2005-04-16 22:20:36 +00:00
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#undef BLOCKMOVE
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#define Z_WAKE
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#undef Z_EXT_CHARS_IN_BUFFER
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static char rcsid[] =
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"$Revision: 2.3.2.20 $$Date: 2004/02/25 18:14:16 $";
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/*
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* linux/drivers/char/cyclades.c
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*
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* This file contains the driver for the Cyclades async multiport
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* serial boards.
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*
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* Initially written by Randolph Bentson <bentson@grieg.seaslug.org>.
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* Modified and maintained by Marcio Saito <marcio@cyclades.com>.
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* Currently maintained by Cyclades team <async@cyclades.com>.
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*
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* For Technical support and installation problems, please send e-mail
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* to support@cyclades.com.
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*
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* Much of the design and some of the code came from serial.c
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* which was copyright (C) 1991, 1992 Linus Torvalds. It was
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* extensively rewritten by Theodore Ts'o, 8/16/92 -- 9/14/92,
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* and then fixed as suggested by Michael K. Johnson 12/12/92.
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*
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* This version supports shared IRQ's (only for PCI boards).
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*
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* $Log: cyclades.c,v $
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* Prevent users from opening non-existing Z ports.
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*
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* Revision 2.3.2.8 2000/07/06 18:14:16 ivan
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* Fixed the PCI detection function to work properly on Alpha systems.
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* Implemented support for TIOCSERGETLSR ioctl.
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* Implemented full support for non-standard baud rates.
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*
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* Revision 2.3.2.7 2000/06/01 18:26:34 ivan
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* Request PLX I/O region, although driver doesn't use it, to avoid
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* problems with other drivers accessing it.
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* Removed count for on-board buffer characters in cy_chars_in_buffer
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* (Cyclades-Z only).
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*
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* Revision 2.3.2.6 2000/05/05 13:56:05 ivan
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* Driver now reports physical instead of virtual memory addresses.
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* Masks were added to some Cyclades-Z read accesses.
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* Implemented workaround for PLX9050 bug that would cause a system lockup
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* in certain systems, depending on the MMIO addresses allocated to the
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* board.
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* Changed the Tx interrupt programming in the CD1400 chips to boost up
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* performance (Cyclom-Y only).
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* Code is now compliant with the new module interface (module_[init|exit]).
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* Make use of the PCI helper functions to access PCI resources.
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* Did some code "housekeeping".
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*
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* Revision 2.3.2.5 2000/01/19 14:35:33 ivan
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* Fixed bug in cy_set_termios on CRTSCTS flag turnoff.
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*
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* Revision 2.3.2.4 2000/01/17 09:19:40 ivan
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* Fixed SMP locking in Cyclom-Y interrupt handler.
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*
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* Revision 2.3.2.3 1999/12/28 12:11:39 ivan
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* Added a new cyclades_card field called nports to allow the driver to
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* know the exact number of ports found by the Z firmware after its load;
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* RX buffer contention prevention logic on interrupt op mode revisited
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* (Cyclades-Z only);
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* Revisited printk's for Z debug;
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* Driver now makes sure that the constant SERIAL_XMIT_SIZE is defined;
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*
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* Revision 2.3.2.2 1999/10/01 11:27:43 ivan
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* Fixed bug in cyz_poll that would make all ports but port 0
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* unable to transmit/receive data (Cyclades-Z only);
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* Implemented logic to prevent the RX buffer from being stuck with data
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* due to a driver / firmware race condition in interrupt op mode
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* (Cyclades-Z only);
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* Fixed bug in block_til_ready logic that would lead to a system crash;
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* Revisited cy_close spinlock usage;
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*
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* Revision 2.3.2.1 1999/09/28 11:01:22 ivan
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* Revisited CONFIG_PCI conditional compilation for PCI board support;
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* Implemented TIOCGICOUNT and TIOCMIWAIT ioctl support;
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* _Major_ cleanup on the Cyclades-Z interrupt support code / logic;
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* Removed CTS handling from the driver -- this is now completely handled
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* by the firmware (Cyclades-Z only);
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* Flush RX on-board buffers on a port open (Cyclades-Z only);
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* Fixed handling of ASYNC_SPD_* TTY flags;
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* Module unload now unmaps all memory area allocated by ioremap;
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*
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* Revision 2.3.1.1 1999/07/15 16:45:53 ivan
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* Removed CY_PROC conditional compilation;
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* Implemented SMP-awareness for the driver;
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* Implemented a new ISA IRQ autoprobe that uses the irq_probe_[on|off]
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* functions;
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* The driver now accepts memory addresses (maddr=0xMMMMM) and IRQs
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* (irq=NN) as parameters (only for ISA boards);
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* Fixed bug in set_line_char that would prevent the Cyclades-Z
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* ports from being configured at speeds above 115.2Kbps;
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* Fixed bug in cy_set_termios that would prevent XON/XOFF flow control
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* switching from working properly;
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* The driver now only prints IRQ info for the Cyclades-Z if it's
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* configured to work in interrupt mode;
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*
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* Revision 2.2.2.3 1999/06/28 11:13:29 ivan
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* Added support for interrupt mode operation for the Z cards;
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* Removed the driver inactivity control for the Z;
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* Added a missing MOD_DEC_USE_COUNT in the cy_open function for when
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* the Z firmware is not loaded yet;
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* Replaced the "manual" Z Tx flush buffer by a call to a FW command of
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* same functionality;
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* Implemented workaround for IRQ setting loss on the PCI configuration
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* registers after a PCI bridge EEPROM reload (affects PLX9060 only);
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*
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* Revision 2.2.2.2 1999/05/14 17:18:15 ivan
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* /proc entry location changed to /proc/tty/driver/cyclades;
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* Added support to shared IRQ's (only for PCI boards);
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* Added support for Cobalt Qube2 systems;
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* IRQ [de]allocation scheme revisited;
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* BREAK implementation changed in order to make use of the 'break_ctl'
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* TTY facility;
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* Fixed typo in TTY structure field 'driver_name';
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* Included a PCI bridge reset and EEPROM reload in the board
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* initialization code (for both Y and Z series).
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*
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* Revision 2.2.2.1 1999/04/08 16:17:43 ivan
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* Fixed a bug in cy_wait_until_sent that was preventing the port to be
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* closed properly after a SIGINT;
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* Module usage counter scheme revisited;
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* Added support to the upcoming Y PCI boards (i.e., support to additional
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* PCI Device ID's).
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*
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* Revision 2.2.1.10 1999/01/20 16:14:29 ivan
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* Removed all unnecessary page-alignement operations in ioremap calls
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* (ioremap is currently safe for these operations).
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*
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* Revision 2.2.1.9 1998/12/30 18:18:30 ivan
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* Changed access to PLX PCI bridge registers from I/O to MMIO, in
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* order to make PLX9050-based boards work with certain motherboards.
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*
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* Revision 2.2.1.8 1998/11/13 12:46:20 ivan
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* cy_close function now resets (correctly) the tty->closing flag;
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* JIFFIES_DIFF macro fixed.
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*
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* Revision 2.2.1.7 1998/09/03 12:07:28 ivan
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* Fixed bug in cy_close function, which was not informing HW of
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* which port should have the reception disabled before doing so;
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* fixed Cyclom-8YoP hardware detection bug.
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*
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* Revision 2.2.1.6 1998/08/20 17:15:39 ivan
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* Fixed bug in cy_close function, which causes malfunction
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* of one of the first 4 ports when a higher port is closed
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* (Cyclom-Y only).
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*
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* Revision 2.2.1.5 1998/08/10 18:10:28 ivan
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* Fixed Cyclom-4Yo hardware detection bug.
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*
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* Revision 2.2.1.4 1998/08/04 11:02:50 ivan
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* /proc/cyclades implementation with great collaboration of
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* Marc Lewis <marc@blarg.net>;
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* cyy_interrupt was changed to avoid occurrence of kernel oopses
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* during PPP operation.
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*
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* Revision 2.2.1.3 1998/06/01 12:09:10 ivan
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* General code review in order to comply with 2.1 kernel standards;
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* data loss prevention for slow devices revisited (cy_wait_until_sent
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* was created);
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* removed conditional compilation for new/old PCI structure support
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* (now the driver only supports the new PCI structure).
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*
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* Revision 2.2.1.1 1998/03/19 16:43:12 ivan
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* added conditional compilation for new/old PCI structure support;
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* removed kernel series (2.0.x / 2.1.x) conditional compilation.
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*
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* Revision 2.1.1.3 1998/03/16 18:01:12 ivan
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* cleaned up the data loss fix;
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* fixed XON/XOFF handling once more (Cyclades-Z);
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* general review of the driver routines;
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* introduction of a mechanism to prevent data loss with slow
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* printers, by forcing a delay before closing the port.
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*
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* Revision 2.1.1.2 1998/02/17 16:50:00 ivan
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* fixed detection/handling of new CD1400 in Ye boards;
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* fixed XON/XOFF handling (Cyclades-Z);
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* fixed data loss caused by a premature port close;
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* introduction of a flag that holds the CD1400 version ID per port
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* (used by the CYGETCD1400VER new ioctl).
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*
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* Revision 2.1.1.1 1997/12/03 17:31:19 ivan
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* Code review for the module cleanup routine;
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* fixed RTS and DTR status report for new CD1400's in get_modem_info;
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* includes anonymous changes regarding signal_pending.
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*
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* Revision 2.1 1997/11/01 17:42:41 ivan
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* Changes in the driver to support Alpha systems (except 8Zo V_1);
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* BREAK fix for the Cyclades-Z boards;
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* driver inactivity control by FW implemented;
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* introduction of flag that allows driver to take advantage of
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* a special CD1400 feature related to HW flow control;
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* added support for the CD1400 rev. J (Cyclom-Y boards);
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* introduction of ioctls to:
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* - control the rtsdtr_inv flag (Cyclom-Y);
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* - control the rflow flag (Cyclom-Y);
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* - adjust the polling interval (Cyclades-Z);
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*
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* Revision 1.36.4.33 1997/06/27 19:00:00 ivan
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* Fixes related to kernel version conditional
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* compilation.
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*
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* Revision 1.36.4.32 1997/06/14 19:30:00 ivan
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* Compatibility issues between kernels 2.0.x and
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* 2.1.x (mainly related to clear_bit function).
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*
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* Revision 1.36.4.31 1997/06/03 15:30:00 ivan
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* Changes to define the memory window according to the
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* board type.
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*
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* Revision 1.36.4.30 1997/05/16 15:30:00 daniel
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* Changes to support new cycladesZ boards.
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*
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* Revision 1.36.4.29 1997/05/12 11:30:00 daniel
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* Merge of Bentson's and Daniel's version 1.36.4.28.
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* Corrects bug in cy_detect_pci: check if there are more
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* ports than the number of static structs allocated.
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* Warning message during initialization if this driver is
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* used with the new generation of cycladesZ boards. Those
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* will be supported only in next release of the driver.
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* Corrects bug in cy_detect_pci and cy_detect_isa that
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* returned wrong number of VALID boards, when a cyclomY
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* was found with no serial modules connected.
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* Changes to use current (2.1.x) kernel subroutine names
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* and created macros for compilation with 2.0.x kernel,
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* instead of the other way around.
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*
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* Revision 1.36.4.28 1997/05/?? ??:00:00 bentson
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* Change queue_task_irq_off to queue_task_irq.
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* The inline function queue_task_irq_off (tqueue.h)
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* was removed from latest releases of 2.1.x kernel.
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* Use of macro __init to mark the initialization
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* routines, so memory can be reused.
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* Also incorporate implementation of critical region
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* in function cleanup_module() created by anonymous
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* linuxer.
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*
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* Revision 1.36.4.28 1997/04/25 16:00:00 daniel
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* Change to support new firmware that solves DCD problem:
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* application could fail to receive SIGHUP signal when DCD
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* varying too fast.
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*
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* Revision 1.36.4.27 1997/03/26 10:30:00 daniel
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* Changed for support linux versions 2.1.X.
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* Backward compatible with linux versions 2.0.X.
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* Corrected illegal use of filler field in
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* CH_CTRL struct.
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* Deleted some debug messages.
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*
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* Revision 1.36.4.26 1997/02/27 12:00:00 daniel
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* Included check for NULL tty pointer in cyz_poll.
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*
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* Revision 1.36.4.25 1997/02/26 16:28:30 bentson
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* Bill Foster at Blarg! Online services noticed that
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* some of the switch elements of -Z modem control
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* lacked a closing "break;"
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*
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* Revision 1.36.4.24 1997/02/24 11:00:00 daniel
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* Changed low water threshold for buffer xmit_buf
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*
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* Revision 1.36.4.23 1996/12/02 21:50:16 bentson
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* Marcio provided fix to modem status fetch for -Z
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*
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* Revision 1.36.4.22 1996/10/28 22:41:17 bentson
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* improve mapping of -Z control page (thanks to Steve
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* Price <stevep@fa.tdktca.com> for help on this)
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*
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* Revision 1.36.4.21 1996/09/10 17:00:10 bentson
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* shift from CPU-bound to memcopy in cyz_polling operation
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*
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* Revision 1.36.4.20 1996/09/09 18:30:32 Bentson
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* Added support to set and report higher speeds.
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*
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* Revision 1.36.4.19c 1996/08/09 10:00:00 Marcio Saito
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* Some fixes in the HW flow control for the BETA release.
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* Don't try to register the IRQ.
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*
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* Revision 1.36.4.19 1996/08/08 16:23:18 Bentson
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* make sure "cyc" appears in all kernel messages; all soft interrupts
|
|
|
|
|
* handled by same routine; recognize out-of-band reception; comment
|
|
|
|
|
* out some diagnostic messages; leave RTS/CTS flow control to hardware;
|
2005-10-30 23:02:20 +00:00
|
|
|
* fix race condition in -Z buffer management; only -Y needs to explicitly
|
2005-04-16 22:20:36 +00:00
|
|
|
* flush chars; tidy up some startup messages;
|
|
|
|
|
*
|
|
|
|
|
* Revision 1.36.4.18 1996/07/25 18:57:31 bentson
|
|
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|
|
* shift MOD_INC_USE_COUNT location to match
|
|
|
|
|
* serial.c; purge some diagnostic messages;
|
|
|
|
|
*
|
|
|
|
|
* Revision 1.36.4.17 1996/07/25 18:01:08 bentson
|
|
|
|
|
* enable modem status messages and fetch & process them; note
|
|
|
|
|
* time of last activity type for each port; set_line_char now
|
|
|
|
|
* supports more than line 0 and treats 0 baud correctly;
|
|
|
|
|
* get_modem_info senses rs_status;
|
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|
|
|
*
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|
|
|
* Revision 1.36.4.16 1996/07/20 08:43:15 bentson
|
|
|
|
|
* barely works--now's time to turn on
|
|
|
|
|
* more features 'til it breaks
|
|
|
|
|
*
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|
|
|
* Revision 1.36.4.15 1996/07/19 22:30:06 bentson
|
|
|
|
|
* check more -Z board status; shorten boot message
|
|
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|
*
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|
|
* Revision 1.36.4.14 1996/07/19 22:20:37 bentson
|
|
|
|
|
* fix reference to ch_ctrl in startup; verify return
|
|
|
|
|
* values from cyz_issue_cmd and cyz_update_channel;
|
|
|
|
|
* more stuff to get modem control correct;
|
|
|
|
|
*
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|
|
* Revision 1.36.4.13 1996/07/11 19:53:33 bentson
|
|
|
|
|
* more -Z stuff folded in; re-order changes to put -Z stuff
|
|
|
|
|
* after -Y stuff (to make changes clearer)
|
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*
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|
* Revision 1.36.4.12 1996/07/11 15:40:55 bentson
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|
|
* Add code to poll Cyclades-Z. Add code to get & set RS-232 control.
|
|
|
|
|
* Add code to send break. Clear firmware ID word at startup (so
|
|
|
|
|
* that other code won't talk to inactive board).
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|
*
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|
|
* Revision 1.36.4.11 1996/07/09 05:28:29 bentson
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|
|
* add code for -Z in set_line_char
|
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*
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|
|
* Revision 1.36.4.10 1996/07/08 19:28:37 bentson
|
|
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|
|
* fold more -Z stuff (or in some cases, error messages)
|
|
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|
|
* into driver; add text to "don't know what to do" messages.
|
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|
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*
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|
|
* Revision 1.36.4.9 1996/07/08 18:38:38 bentson
|
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|
|
* moved compile-time flags near top of file; cosmetic changes
|
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|
|
|
* to narrow text (to allow 2-up printing); changed many declarations
|
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|
|
|
* to "static" to limit external symbols; shuffled code order to
|
|
|
|
|
* coalesce -Y and -Z specific code, also to put internal functions
|
|
|
|
|
* in order of tty_driver structure; added code to recognize -Z
|
|
|
|
|
* ports (and for moment, do nothing or report error); add cy_startup
|
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|
|
|
* to parse boot command line for extra base addresses for ISA probes;
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|
*
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|
|
* Revision 1.36.4.8 1996/06/25 17:40:19 bentson
|
|
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|
|
* reorder some code, fix types of some vars (int vs. long),
|
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|
|
* add cy_setup to support user declared ISA addresses
|
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|
*
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|
|
* Revision 1.36.4.7 1996/06/21 23:06:18 bentson
|
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|
|
* dump ioctl based firmware load (it's now a user level
|
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|
|
* program); ensure uninitialzed ports cannot be used
|
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|
*
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|
|
* Revision 1.36.4.6 1996/06/20 23:17:19 bentson
|
|
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|
|
* rename vars and restructure some code
|
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|
|
*
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|
|
* Revision 1.36.4.5 1996/06/14 15:09:44 bentson
|
|
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|
|
* get right status back after boot load
|
|
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|
|
*
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|
|
* Revision 1.36.4.4 1996/06/13 19:51:44 bentson
|
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|
|
* successfully loads firmware
|
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|
|
|
*
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|
|
|
* Revision 1.36.4.3 1996/06/13 06:08:33 bentson
|
|
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|
|
* add more of the code for the boot/load ioctls
|
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|
|
*
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|
|
* Revision 1.36.4.2 1996/06/11 21:00:51 bentson
|
|
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|
|
* start to add Z functionality--starting with ioctl
|
|
|
|
|
* for loading firmware
|
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|
|
|
*
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|
|
* Revision 1.36.4.1 1996/06/10 18:03:02 bentson
|
|
|
|
|
* added code to recognize Z/PCI card at initialization; report
|
|
|
|
|
* presence, but card is not initialized (because firmware needs
|
|
|
|
|
* to be loaded)
|
|
|
|
|
*
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|
|
|
|
* Revision 1.36.3.8 1996/06/07 16:29:00 bentson
|
|
|
|
|
* starting minor number at zero; added missing verify_area
|
|
|
|
|
* as noted by Heiko Eissfeldt <heiko@colossus.escape.de>
|
|
|
|
|
*
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|
|
|
* Revision 1.36.3.7 1996/04/19 21:06:18 bentson
|
|
|
|
|
* remove unneeded boot message & fix CLOCAL hardware flow
|
|
|
|
|
* control (Miquel van Smoorenburg <miquels@Q.cistron.nl>);
|
|
|
|
|
* remove unused diagnostic statements; minor 0 is first;
|
|
|
|
|
*
|
|
|
|
|
* Revision 1.36.3.6 1996/03/13 13:21:17 marcio
|
|
|
|
|
* The kernel function vremap (available only in later 1.3.xx kernels)
|
|
|
|
|
* allows the access to memory addresses above the RAM. This revision
|
|
|
|
|
* of the driver supports PCI boards below 1Mb (device id 0x100) and
|
|
|
|
|
* above 1Mb (device id 0x101).
|
|
|
|
|
*
|
|
|
|
|
* Revision 1.36.3.5 1996/03/07 15:20:17 bentson
|
|
|
|
|
* Some global changes to interrupt handling spilled into
|
|
|
|
|
* this driver--mostly unused arguments in system function
|
|
|
|
|
* calls. Also added change by Marcio Saito which should
|
|
|
|
|
* reduce lost interrupts at startup by fast processors.
|
|
|
|
|
*
|
|
|
|
|
* Revision 1.36.3.4 1995/11/13 20:45:10 bentson
|
|
|
|
|
* Changes by Corey Minyard <minyard@wf-rch.cirr.com> distributed
|
|
|
|
|
* in 1.3.41 kernel to remove a possible race condition, extend
|
|
|
|
|
* some error messages, and let the driver run as a loadable module
|
|
|
|
|
* Change by Alan Wendt <alan@ez0.ezlink.com> to remove a
|
|
|
|
|
* possible race condition.
|
|
|
|
|
* Change by Marcio Saito <marcio@cyclades.com> to fix PCI addressing.
|
|
|
|
|
*
|
|
|
|
|
* Revision 1.36.3.3 1995/11/13 19:44:48 bentson
|
|
|
|
|
* Changes by Linus Torvalds in 1.3.33 kernel distribution
|
|
|
|
|
* required due to reordering of driver initialization.
|
|
|
|
|
* Drivers are now initialized *after* memory management.
|
|
|
|
|
*
|
|
|
|
|
* Revision 1.36.3.2 1995/09/08 22:07:14 bentson
|
|
|
|
|
* remove printk from ISR; fix typo
|
|
|
|
|
*
|
|
|
|
|
* Revision 1.36.3.1 1995/09/01 12:00:42 marcio
|
|
|
|
|
* Minor fixes in the PCI board support. PCI function calls in
|
|
|
|
|
* conditional compilation (CONFIG_PCI). Thanks to Jim Duncan
|
|
|
|
|
* <duncan@okay.com>. "bad serial count" message removed.
|
|
|
|
|
*
|
|
|
|
|
* Revision 1.36.3 1995/08/22 09:19:42 marcio
|
|
|
|
|
* Cyclom-Y/PCI support added. Changes in the cy_init routine and
|
|
|
|
|
* board initialization. Changes in the boot messages. The driver
|
|
|
|
|
* supports up to 4 boards and 64 ports by default.
|
|
|
|
|
*
|
|
|
|
|
* Revision 1.36.1.4 1995/03/29 06:14:14 bentson
|
|
|
|
|
* disambiguate between Cyclom-16Y and Cyclom-32Ye;
|
|
|
|
|
*
|
|
|
|
|
* Revision 1.36.1.3 1995/03/23 22:15:35 bentson
|
|
|
|
|
* add missing break in modem control block in ioctl switch statement
|
|
|
|
|
* (discovered by Michael Edward Chastain <mec@jobe.shell.portal.com>);
|
|
|
|
|
*
|
|
|
|
|
* Revision 1.36.1.2 1995/03/22 19:16:22 bentson
|
|
|
|
|
* make sure CTS flow control is set as soon as possible (thanks
|
|
|
|
|
* to note from David Lambert <lambert@chesapeake.rps.slb.com>);
|
|
|
|
|
*
|
|
|
|
|
* Revision 1.36.1.1 1995/03/13 15:44:43 bentson
|
|
|
|
|
* initialize defaults for receive threshold and stale data timeout;
|
|
|
|
|
* cosmetic changes;
|
|
|
|
|
*
|
|
|
|
|
* Revision 1.36 1995/03/10 23:33:53 bentson
|
|
|
|
|
* added support of chips 4-7 in 32 port Cyclom-Ye;
|
|
|
|
|
* fix cy_interrupt pointer dereference problem
|
|
|
|
|
* (Joe Portman <baron@aa.net>);
|
|
|
|
|
* give better error response if open is attempted on non-existent port
|
|
|
|
|
* (Zachariah Vaum <jchryslr@netcom.com>);
|
|
|
|
|
* correct command timeout (Kenneth Lerman <lerman@@seltd.newnet.com>);
|
|
|
|
|
* conditional compilation for -16Y on systems with fast, noisy bus;
|
|
|
|
|
* comment out diagnostic print function;
|
|
|
|
|
* cleaned up table of base addresses;
|
|
|
|
|
* set receiver time-out period register to correct value,
|
|
|
|
|
* set receive threshold to better default values,
|
|
|
|
|
* set chip timer to more accurate 200 Hz ticking,
|
|
|
|
|
* add code to monitor and modify receive parameters
|
|
|
|
|
* (Rik Faith <faith@cs.unc.edu> Nick Simicich
|
|
|
|
|
* <njs@scifi.emi.net>);
|
|
|
|
|
*
|
|
|
|
|
* Revision 1.35 1994/12/16 13:54:18 steffen
|
|
|
|
|
* additional patch by Marcio Saito for board detection
|
|
|
|
|
* Accidently left out in 1.34
|
|
|
|
|
*
|
|
|
|
|
* Revision 1.34 1994/12/10 12:37:12 steffen
|
|
|
|
|
* This is the corrected version as suggested by Marcio Saito
|
|
|
|
|
*
|
|
|
|
|
* Revision 1.33 1994/12/01 22:41:18 bentson
|
|
|
|
|
* add hooks to support more high speeds directly; add tytso
|
|
|
|
|
* patch regarding CLOCAL wakeups
|
|
|
|
|
*
|
|
|
|
|
* Revision 1.32 1994/11/23 19:50:04 bentson
|
|
|
|
|
* allow direct kernel control of higher signalling rates;
|
|
|
|
|
* look for cards at additional locations
|
|
|
|
|
*
|
|
|
|
|
* Revision 1.31 1994/11/16 04:33:28 bentson
|
|
|
|
|
* ANOTHER fix from Corey Minyard, minyard@wf-rch.cirr.com--
|
|
|
|
|
* a problem in chars_in_buffer has been resolved by some
|
|
|
|
|
* small changes; this should yield smoother output
|
|
|
|
|
*
|
|
|
|
|
* Revision 1.30 1994/11/16 04:28:05 bentson
|
|
|
|
|
* Fix from Corey Minyard, Internet: minyard@metronet.com,
|
|
|
|
|
* UUCP: minyard@wf-rch.cirr.com, WORK: minyardbnr.ca, to
|
|
|
|
|
* cy_hangup that appears to clear up much (all?) of the
|
|
|
|
|
* DTR glitches; also he's added/cleaned-up diagnostic messages
|
|
|
|
|
*
|
|
|
|
|
* Revision 1.29 1994/11/16 04:16:07 bentson
|
|
|
|
|
* add change proposed by Ralph Sims, ralphs@halcyon.com, to
|
|
|
|
|
* operate higher speeds in same way as other serial ports;
|
|
|
|
|
* add more serial ports (for up to two 16-port muxes).
|
|
|
|
|
*
|
|
|
|
|
* Revision 1.28 1994/11/04 00:13:16 root
|
|
|
|
|
* turn off diagnostic messages
|
|
|
|
|
*
|
|
|
|
|
* Revision 1.27 1994/11/03 23:46:37 root
|
|
|
|
|
* bunch of changes to bring driver into greater conformance
|
|
|
|
|
* with the serial.c driver (looking for missed fixes)
|
|
|
|
|
*
|
|
|
|
|
* Revision 1.26 1994/11/03 22:40:36 root
|
|
|
|
|
* automatic interrupt probing fixed.
|
|
|
|
|
*
|
|
|
|
|
* Revision 1.25 1994/11/03 20:17:02 root
|
|
|
|
|
* start to implement auto-irq
|
|
|
|
|
*
|
|
|
|
|
* Revision 1.24 1994/11/03 18:01:55 root
|
|
|
|
|
* still working on modem signals--trying not to drop DTR
|
|
|
|
|
* during the getty/login processes
|
|
|
|
|
*
|
|
|
|
|
* Revision 1.23 1994/11/03 17:51:36 root
|
|
|
|
|
* extend baud rate support; set receive threshold as function
|
|
|
|
|
* of baud rate; fix some problems with RTS/CTS;
|
|
|
|
|
*
|
|
|
|
|
* Revision 1.22 1994/11/02 18:05:35 root
|
|
|
|
|
* changed arguments to udelay to type long to get
|
|
|
|
|
* delays to be of correct duration
|
|
|
|
|
*
|
|
|
|
|
* Revision 1.21 1994/11/02 17:37:30 root
|
|
|
|
|
* employ udelay (after calibrating loops_per_second earlier
|
|
|
|
|
* in init/main.c) instead of using home-grown delay routines
|
|
|
|
|
*
|
|
|
|
|
* Revision 1.20 1994/11/02 03:11:38 root
|
|
|
|
|
* cy_chars_in_buffer forces a return value of 0 to let
|
|
|
|
|
* login work (don't know why it does); some functions
|
|
|
|
|
* that were returning EFAULT, now executes the code;
|
|
|
|
|
* more work on deciding when to disable xmit interrupts;
|
|
|
|
|
*
|
|
|
|
|
* Revision 1.19 1994/11/01 20:10:14 root
|
|
|
|
|
* define routine to start transmission interrupts (by enabling
|
|
|
|
|
* transmit interrupts); directly enable/disable modem interrupts;
|
|
|
|
|
*
|
|
|
|
|
* Revision 1.18 1994/11/01 18:40:45 bentson
|
|
|
|
|
* Don't always enable transmit interrupts in startup; interrupt on
|
|
|
|
|
* TxMpty instead of TxRdy to help characters get out before shutdown;
|
|
|
|
|
* restructure xmit interrupt to check for chars first and quit if
|
|
|
|
|
* none are ready to go; modem status (MXVRx) is upright, _not_ inverted
|
|
|
|
|
* (to my view);
|
|
|
|
|
*
|
|
|
|
|
* Revision 1.17 1994/10/30 04:39:45 bentson
|
|
|
|
|
* rename serial_driver and callout_driver to cy_serial_driver and
|
|
|
|
|
* cy_callout_driver to avoid linkage interference; initialize
|
|
|
|
|
* info->type to PORT_CIRRUS; ruggedize paranoia test; elide ->port
|
|
|
|
|
* from cyclades_port structure; add paranoia check to cy_close;
|
|
|
|
|
*
|
|
|
|
|
* Revision 1.16 1994/10/30 01:14:33 bentson
|
|
|
|
|
* change major numbers; add some _early_ return statements;
|
|
|
|
|
*
|
|
|
|
|
* Revision 1.15 1994/10/29 06:43:15 bentson
|
|
|
|
|
* final tidying up for clean compile; enable some error reporting
|
|
|
|
|
*
|
|
|
|
|
* Revision 1.14 1994/10/28 20:30:22 Bentson
|
|
|
|
|
* lots of changes to drag the driver towards the new tty_io
|
|
|
|
|
* structures and operation. not expected to work, but may
|
|
|
|
|
* compile cleanly.
|
|
|
|
|
*
|
|
|
|
|
* Revision 1.13 1994/07/21 23:08:57 Bentson
|
|
|
|
|
* add some diagnostic cruft; support 24 lines (for testing
|
|
|
|
|
* both -8Y and -16Y cards; be more thorough in servicing all
|
|
|
|
|
* chips during interrupt; add "volatile" a few places to
|
|
|
|
|
* circumvent compiler optimizations; fix base & offset
|
|
|
|
|
* computations in block_til_ready (was causing chip 0 to
|
|
|
|
|
* stop operation)
|
|
|
|
|
*
|
|
|
|
|
* Revision 1.12 1994/07/19 16:42:11 Bentson
|
|
|
|
|
* add some hackery for kernel version 1.1.8; expand
|
|
|
|
|
* error messages; refine timing for delay loops and
|
|
|
|
|
* declare loop params volatile
|
|
|
|
|
*
|
|
|
|
|
* Revision 1.11 1994/06/11 21:53:10 bentson
|
|
|
|
|
* get use of save_car right in transmit interrupt service
|
|
|
|
|
*
|
|
|
|
|
* Revision 1.10.1.1 1994/06/11 21:31:18 bentson
|
|
|
|
|
* add some diagnostic printing; try to fix save_car stuff
|
|
|
|
|
*
|
|
|
|
|
* Revision 1.10 1994/06/11 20:36:08 bentson
|
|
|
|
|
* clean up compiler warnings
|
|
|
|
|
*
|
|
|
|
|
* Revision 1.9 1994/06/11 19:42:46 bentson
|
|
|
|
|
* added a bunch of code to support modem signalling
|
|
|
|
|
*
|
|
|
|
|
* Revision 1.8 1994/06/11 17:57:07 bentson
|
|
|
|
|
* recognize break & parity error
|
|
|
|
|
*
|
|
|
|
|
* Revision 1.7 1994/06/05 05:51:34 bentson
|
|
|
|
|
* Reorder baud table to be monotonic; add cli to CP; discard
|
|
|
|
|
* incoming characters and status if the line isn't open; start to
|
|
|
|
|
* fold code into cy_throttle; start to port get_serial_info,
|
|
|
|
|
* set_serial_info, get_modem_info, set_modem_info, and send_break
|
|
|
|
|
* from serial.c; expand cy_ioctl; relocate and expand config_setup;
|
|
|
|
|
* get flow control characters from tty struct; invalidate ports w/o
|
|
|
|
|
* hardware;
|
|
|
|
|
*
|
|
|
|
|
* Revision 1.6 1994/05/31 18:42:21 bentson
|
|
|
|
|
* add a loop-breaker in the interrupt service routine;
|
|
|
|
|
* note when port is initialized so that it can be shut
|
|
|
|
|
* down under the right conditions; receive works without
|
|
|
|
|
* any obvious errors
|
|
|
|
|
*
|
|
|
|
|
* Revision 1.5 1994/05/30 00:55:02 bentson
|
|
|
|
|
* transmit works without obvious errors
|
|
|
|
|
*
|
|
|
|
|
* Revision 1.4 1994/05/27 18:46:27 bentson
|
|
|
|
|
* incorporated more code from lib_y.c; can now print short
|
|
|
|
|
* strings under interrupt control to port zero; seems to
|
|
|
|
|
* select ports/channels/lines correctly
|
|
|
|
|
*
|
|
|
|
|
* Revision 1.3 1994/05/25 22:12:44 bentson
|
|
|
|
|
* shifting from multi-port on a card to proper multiplexor
|
|
|
|
|
* data structures; added skeletons of most routines
|
|
|
|
|
*
|
|
|
|
|
* Revision 1.2 1994/05/19 13:21:43 bentson
|
|
|
|
|
* start to crib from other sources
|
|
|
|
|
*
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
/* If you need to install more boards than NR_CARDS, change the constant
|
|
|
|
|
in the definition below. No other change is necessary to support up to
|
|
|
|
|
eight boards. Beyond that you'll have to extend cy_isa_addresses. */
|
|
|
|
|
|
|
|
|
|
#define NR_CARDS 4
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
If the total number of ports is larger than NR_PORTS, change this
|
|
|
|
|
constant in the definition below. No other change is necessary to
|
|
|
|
|
support more boards/ports. */
|
|
|
|
|
|
|
|
|
|
#define NR_PORTS 256
|
|
|
|
|
|
|
|
|
|
#define ZE_V1_NPORTS 64
|
|
|
|
|
#define ZO_V1 0
|
|
|
|
|
#define ZO_V2 1
|
|
|
|
|
#define ZE_V1 2
|
|
|
|
|
|
|
|
|
|
#define SERIAL_PARANOIA_CHECK
|
|
|
|
|
#undef CY_DEBUG_OPEN
|
|
|
|
|
#undef CY_DEBUG_THROTTLE
|
|
|
|
|
#undef CY_DEBUG_OTHER
|
|
|
|
|
#undef CY_DEBUG_IO
|
|
|
|
|
#undef CY_DEBUG_COUNT
|
|
|
|
|
#undef CY_DEBUG_DTR
|
|
|
|
|
#undef CY_DEBUG_WAIT_UNTIL_SENT
|
|
|
|
|
#undef CY_DEBUG_INTERRUPTS
|
|
|
|
|
#undef CY_16Y_HACK
|
|
|
|
|
#undef CY_ENABLE_MONITORING
|
|
|
|
|
#undef CY_PCI_DEBUG
|
|
|
|
|
|
|
|
|
|
#if 0
|
|
|
|
|
#define PAUSE __asm__("nop");
|
|
|
|
|
#else
|
|
|
|
|
#define PAUSE ;
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Include section
|
|
|
|
|
*/
|
|
|
|
|
#include <linux/module.h>
|
|
|
|
|
#include <linux/errno.h>
|
|
|
|
|
#include <linux/signal.h>
|
|
|
|
|
#include <linux/sched.h>
|
|
|
|
|
#include <linux/timer.h>
|
|
|
|
|
#include <linux/interrupt.h>
|
|
|
|
|
#include <linux/tty.h>
|
[PATCH] TTY layer buffering revamp
The API and code have been through various bits of initial review by
serial driver people but they definitely need to live somewhere for a
while so the unconverted drivers can get knocked into shape, existing
drivers that have been updated can be better tuned and bugs whacked out.
This replaces the tty flip buffers with kmalloc objects in rings. In the
normal situation for an IRQ driven serial port at typical speeds the
behaviour is pretty much the same, two buffers end up allocated and the
kernel cycles between them as before.
When there are delays or at high speed we now behave far better as the
buffer pool can grow a bit rather than lose characters. This also means
that we can operate at higher speeds reliably.
For drivers that receive characters in blocks (DMA based, USB and
especially virtualisation) the layer allows a lot of driver specific
code that works around the tty layer with private secondary queues to be
removed. The IBM folks need this sort of layer, the smart serial port
people do, the virtualisers do (because a virtualised tty typically
operates at infinite speed rather than emulating 9600 baud).
Finally many drivers had invalid and unsafe attempts to avoid buffer
overflows by directly invoking tty methods extracted out of the innards
of work queue structs. These are no longer needed and all go away. That
fixes various random hangs with serial ports on overflow.
The other change in here is to optimise the receive_room path that is
used by some callers. It turns out that only one ldisc uses receive room
except asa constant and it updates it far far less than the value is
read. We thus make it a variable not a function call.
I expect the code to contain bugs due to the size alone but I'll be
watching and squashing them and feeding out new patches as it goes.
Because the buffers now dynamically expand you should only run out of
buffering when the kernel runs out of memory for real. That means a lot of
the horrible hacks high performance drivers used to do just aren't needed any
more.
Description:
tty_insert_flip_char is an old API and continues to work as before, as does
tty_flip_buffer_push() [this is why many drivers dont need modification]. It
does now also return the number of chars inserted
There are also
tty_buffer_request_room(tty, len)
which asks for a buffer block of the length requested and returns the space
found. This improves efficiency with hardware that knows how much to
transfer.
and tty_insert_flip_string_flags(tty, str, flags, len)
to insert a string of characters and flags
For a smart interface the usual code is
len = tty_request_buffer_room(tty, amount_hardware_says);
tty_insert_flip_string(tty, buffer_from_card, len);
More description!
At the moment tty buffers are attached directly to the tty. This is causing a
lot of the problems related to tty layer locking, also problems at high speed
and also with bursty data (such as occurs in virtualised environments)
I'm working on ripping out the flip buffers and replacing them with a pool of
dynamically allocated buffers. This allows both for old style "byte I/O"
devices and also helps virtualisation and smart devices where large blocks of
data suddenely materialise and need storing.
So far so good. Lots of drivers reference tty->flip.*. Several of them also
call directly and unsafely into function pointers it provides. This will all
break. Most drivers can use tty_insert_flip_char which can be kept as an API
but others need more.
At the moment I've added the following interfaces, if people think more will
be needed now is a good time to say
int tty_buffer_request_room(tty, size)
Try and ensure at least size bytes are available, returns actual room (may be
zero). At the moment it just uses the flipbuf space but that will change.
Repeated calls without characters being added are not cumulative. (ie if you
call it with 1, 1, 1, and then 4 you'll have four characters of space. The
other functions will also try and grow buffers in future but this will be a
more efficient way when you know block sizes.
int tty_insert_flip_char(tty, ch, flag)
As before insert a character if there is room. Now returns 1 for success, 0
for failure.
int tty_insert_flip_string(tty, str, len)
Insert a block of non error characters. Returns the number inserted.
int tty_prepare_flip_string(tty, strptr, len)
Adjust the buffer to allow len characters to be added. Returns a buffer
pointer in strptr and the length available. This allows for hardware that
needs to use functions like insl or mencpy_fromio.
Signed-off-by: Alan Cox <alan@redhat.com>
Cc: Paul Fulghum <paulkf@microgate.com>
Signed-off-by: Hirokazu Takata <takata@linux-m32r.org>
Signed-off-by: Serge Hallyn <serue@us.ibm.com>
Signed-off-by: Jeff Dike <jdike@addtoit.com>
Signed-off-by: John Hawkes <hawkes@sgi.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10 04:54:13 +00:00
|
|
|
#include <linux/tty_flip.h>
|
2005-04-16 22:20:36 +00:00
|
|
|
#include <linux/serial.h>
|
|
|
|
|
#include <linux/major.h>
|
|
|
|
|
#include <linux/string.h>
|
|
|
|
|
#include <linux/fcntl.h>
|
|
|
|
|
#include <linux/ptrace.h>
|
|
|
|
|
#include <linux/cyclades.h>
|
|
|
|
|
#include <linux/mm.h>
|
|
|
|
|
#include <linux/ioport.h>
|
|
|
|
|
#include <linux/init.h>
|
|
|
|
|
#include <linux/delay.h>
|
|
|
|
|
#include <linux/spinlock.h>
|
|
|
|
|
#include <linux/bitops.h>
|
|
|
|
|
|
|
|
|
|
#include <asm/system.h>
|
|
|
|
|
#include <asm/io.h>
|
|
|
|
|
#include <asm/irq.h>
|
|
|
|
|
#include <asm/uaccess.h>
|
|
|
|
|
|
|
|
|
|
#define CY_LOCK(info,flags) \
|
|
|
|
|
do { \
|
|
|
|
|
spin_lock_irqsave(&cy_card[info->card].card_lock, flags); \
|
|
|
|
|
} while (0)
|
|
|
|
|
|
|
|
|
|
#define CY_UNLOCK(info,flags) \
|
|
|
|
|
do { \
|
|
|
|
|
spin_unlock_irqrestore(&cy_card[info->card].card_lock, flags); \
|
|
|
|
|
} while (0)
|
|
|
|
|
|
|
|
|
|
#include <linux/types.h>
|
|
|
|
|
#include <linux/kernel.h>
|
|
|
|
|
#include <linux/pci.h>
|
|
|
|
|
|
|
|
|
|
#include <linux/stat.h>
|
|
|
|
|
#include <linux/proc_fs.h>
|
|
|
|
|
|
|
|
|
|
static void cy_throttle (struct tty_struct *tty);
|
|
|
|
|
static void cy_send_xchar (struct tty_struct *tty, char ch);
|
|
|
|
|
|
|
|
|
|
#define IS_CYC_Z(card) ((card).num_chips == -1)
|
|
|
|
|
|
|
|
|
|
#define Z_FPGA_CHECK(card) \
|
|
|
|
|
((cy_readl(&((struct RUNTIME_9060 __iomem *) \
|
|
|
|
|
((card).ctl_addr))->init_ctrl) & (1<<17)) != 0)
|
|
|
|
|
|
|
|
|
|
#define ISZLOADED(card) (((ZO_V1==cy_readl(&((struct RUNTIME_9060 __iomem *) \
|
|
|
|
|
((card).ctl_addr))->mail_box_0)) || \
|
|
|
|
|
Z_FPGA_CHECK(card)) && \
|
|
|
|
|
(ZFIRM_ID==cy_readl(&((struct FIRM_ID __iomem *) \
|
|
|
|
|
((card).base_addr+ID_ADDRESS))->signature)))
|
|
|
|
|
|
|
|
|
|
#ifndef SERIAL_XMIT_SIZE
|
|
|
|
|
#define SERIAL_XMIT_SIZE (min(PAGE_SIZE, 4096))
|
|
|
|
|
#endif
|
|
|
|
|
#define WAKEUP_CHARS 256
|
|
|
|
|
|
|
|
|
|
#define STD_COM_FLAGS (0)
|
|
|
|
|
|
|
|
|
|
#define JIFFIES_DIFF(n, j) ((j) - (n))
|
|
|
|
|
|
|
|
|
|
static struct tty_driver *cy_serial_driver;
|
|
|
|
|
|
|
|
|
|
#ifdef CONFIG_ISA
|
|
|
|
|
/* This is the address lookup table. The driver will probe for
|
|
|
|
|
Cyclom-Y/ISA boards at all addresses in here. If you want the
|
|
|
|
|
driver to probe addresses at a different address, add it to
|
|
|
|
|
this table. If the driver is probing some other board and
|
|
|
|
|
causing problems, remove the offending address from this table.
|
|
|
|
|
The cy_setup function extracts additional addresses from the
|
|
|
|
|
boot options line. The form is "cyclades=address,address..."
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
static unsigned int cy_isa_addresses[] = {
|
|
|
|
|
0xD0000,
|
|
|
|
|
0xD2000,
|
|
|
|
|
0xD4000,
|
|
|
|
|
0xD6000,
|
|
|
|
|
0xD8000,
|
|
|
|
|
0xDA000,
|
|
|
|
|
0xDC000,
|
|
|
|
|
0xDE000,
|
|
|
|
|
0,0,0,0,0,0,0,0
|
|
|
|
|
};
|
2006-01-10 04:54:02 +00:00
|
|
|
#define NR_ISA_ADDRS ARRAY_SIZE(cy_isa_addresses)
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
|
#ifdef MODULE
|
|
|
|
|
static long maddr[NR_CARDS] = { 0, };
|
|
|
|
|
static int irq[NR_CARDS] = { 0, };
|
|
|
|
|
|
|
|
|
|
module_param_array(maddr, long, NULL, 0);
|
|
|
|
|
module_param_array(irq, int, NULL, 0);
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
#endif /* CONFIG_ISA */
|
|
|
|
|
|
|
|
|
|
/* This is the per-card data structure containing address, irq, number of
|
|
|
|
|
channels, etc. This driver supports a maximum of NR_CARDS cards.
|
|
|
|
|
*/
|
|
|
|
|
static struct cyclades_card cy_card[NR_CARDS];
|
|
|
|
|
|
|
|
|
|
/* This is the per-channel data structure containing pointers, flags
|
|
|
|
|
and variables for the port. This driver supports a maximum of NR_PORTS.
|
|
|
|
|
*/
|
|
|
|
|
static struct cyclades_port cy_port[NR_PORTS];
|
|
|
|
|
|
|
|
|
|
static int cy_next_channel; /* next minor available */
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* This is used to look up the divisor speeds and the timeouts
|
|
|
|
|
* We're normally limited to 15 distinct baud rates. The extra
|
|
|
|
|
* are accessed via settings in info->flags.
|
|
|
|
|
* 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
|
|
|
|
|
* 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
|
|
|
|
|
* HI VHI
|
|
|
|
|
* 20
|
|
|
|
|
*/
|
|
|
|
|
static int baud_table[] = {
|
|
|
|
|
0, 50, 75, 110, 134, 150, 200, 300, 600, 1200,
|
|
|
|
|
1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800,115200,150000,
|
|
|
|
|
230400, 0};
|
|
|
|
|
|
|
|
|
|
static char baud_co_25[] = { /* 25 MHz clock option table */
|
|
|
|
|
/* value => 00 01 02 03 04 */
|
|
|
|
|
/* divide by 8 32 128 512 2048 */
|
|
|
|
|
0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02,
|
|
|
|
|
0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
|
|
|
|
|
|
|
|
|
|
static char baud_bpr_25[] = { /* 25 MHz baud rate period table */
|
|
|
|
|
0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3,
|
|
|
|
|
0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15};
|
|
|
|
|
|
|
|
|
|
static char baud_co_60[] = { /* 60 MHz clock option table (CD1400 J) */
|
|
|
|
|
/* value => 00 01 02 03 04 */
|
|
|
|
|
/* divide by 8 32 128 512 2048 */
|
|
|
|
|
0x00, 0x00, 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03,
|
|
|
|
|
0x03, 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
|
|
|
0x00};
|
|
|
|
|
|
|
|
|
|
static char baud_bpr_60[] = { /* 60 MHz baud rate period table (CD1400 J) */
|
|
|
|
|
0x00, 0x82, 0x21, 0xff, 0xdb, 0xc3, 0x92, 0x62, 0xc3, 0x62,
|
|
|
|
|
0x41, 0xc3, 0x62, 0xc3, 0x62, 0xc3, 0x82, 0x62, 0x41, 0x32,
|
|
|
|
|
0x21};
|
|
|
|
|
|
|
|
|
|
static char baud_cor3[] = { /* receive threshold */
|
|
|
|
|
0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
|
|
|
|
|
0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07,
|
|
|
|
|
0x07};
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* The Cyclades driver implements HW flow control as any serial driver.
|
|
|
|
|
* The cyclades_port structure member rflow and the vector rflow_thr
|
|
|
|
|
* allows us to take advantage of a special feature in the CD1400 to avoid
|
|
|
|
|
* data loss even when the system interrupt latency is too high. These flags
|
|
|
|
|
* are to be used only with very special applications. Setting these flags
|
|
|
|
|
* requires the use of a special cable (DTR and RTS reversed). In the new
|
|
|
|
|
* CD1400-based boards (rev. 6.00 or later), there is no need for special
|
|
|
|
|
* cables.
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
static char rflow_thr[] = { /* rflow threshold */
|
|
|
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
|
|
|
0x00, 0x00, 0x00, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
|
|
|
|
|
0x0a};
|
|
|
|
|
|
|
|
|
|
/* The Cyclom-Ye has placed the sequential chips in non-sequential
|
|
|
|
|
* address order. This look-up table overcomes that problem.
|
|
|
|
|
*/
|
|
|
|
|
static int cy_chip_offset [] =
|
|
|
|
|
{ 0x0000,
|
|
|
|
|
0x0400,
|
|
|
|
|
0x0800,
|
|
|
|
|
0x0C00,
|
|
|
|
|
0x0200,
|
|
|
|
|
0x0600,
|
|
|
|
|
0x0A00,
|
|
|
|
|
0x0E00
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
/* PCI related definitions */
|
|
|
|
|
|
|
|
|
|
static unsigned short cy_pci_nboard;
|
|
|
|
|
static unsigned short cy_isa_nboard;
|
|
|
|
|
static unsigned short cy_nboard;
|
|
|
|
|
#ifdef CONFIG_PCI
|
|
|
|
|
static unsigned short cy_pci_dev_id[] = {
|
|
|
|
|
PCI_DEVICE_ID_CYCLOM_Y_Lo, /* PCI < 1Mb */
|
|
|
|
|
PCI_DEVICE_ID_CYCLOM_Y_Hi, /* PCI > 1Mb */
|
|
|
|
|
PCI_DEVICE_ID_CYCLOM_4Y_Lo, /* 4Y PCI < 1Mb */
|
|
|
|
|
PCI_DEVICE_ID_CYCLOM_4Y_Hi, /* 4Y PCI > 1Mb */
|
|
|
|
|
PCI_DEVICE_ID_CYCLOM_8Y_Lo, /* 8Y PCI < 1Mb */
|
|
|
|
|
PCI_DEVICE_ID_CYCLOM_8Y_Hi, /* 8Y PCI > 1Mb */
|
|
|
|
|
PCI_DEVICE_ID_CYCLOM_Z_Lo, /* Z PCI < 1Mb */
|
|
|
|
|
PCI_DEVICE_ID_CYCLOM_Z_Hi, /* Z PCI > 1Mb */
|
|
|
|
|
0 /* end of table */
|
|
|
|
|
};
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
static void cy_start(struct tty_struct *);
|
|
|
|
|
static void set_line_char(struct cyclades_port *);
|
|
|
|
|
static int cyz_issue_cmd(struct cyclades_card *, uclong, ucchar, uclong);
|
|
|
|
|
#ifdef CONFIG_ISA
|
|
|
|
|
static unsigned detect_isa_irq(void __iomem *);
|
|
|
|
|
#endif /* CONFIG_ISA */
|
|
|
|
|
|
|
|
|
|
static int cyclades_get_proc_info(char *, char **, off_t , int , int *, void *);
|
|
|
|
|
|
|
|
|
|
#ifndef CONFIG_CYZ_INTR
|
|
|
|
|
static void cyz_poll(unsigned long);
|
|
|
|
|
|
|
|
|
|
/* The Cyclades-Z polling cycle is defined by this variable */
|
|
|
|
|
static long cyz_polling_cycle = CZ_DEF_POLL;
|
|
|
|
|
|
|
|
|
|
static int cyz_timeron = 0;
|
2005-09-09 20:10:40 +00:00
|
|
|
static DEFINE_TIMER(cyz_timerlist, cyz_poll, 0, 0);
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
|
#else /* CONFIG_CYZ_INTR */
|
|
|
|
|
static void cyz_rx_restart(unsigned long);
|
|
|
|
|
static struct timer_list cyz_rx_full_timer[NR_PORTS];
|
|
|
|
|
#endif /* CONFIG_CYZ_INTR */
|
|
|
|
|
|
|
|
|
|
static inline int
|
|
|
|
|
serial_paranoia_check(struct cyclades_port *info,
|
|
|
|
|
char *name, const char *routine)
|
|
|
|
|
{
|
|
|
|
|
#ifdef SERIAL_PARANOIA_CHECK
|
|
|
|
|
static const char *badmagic =
|
|
|
|
|
"cyc Warning: bad magic number for serial struct (%s) in %s\n";
|
|
|
|
|
static const char *badinfo =
|
|
|
|
|
"cyc Warning: null cyclades_port for (%s) in %s\n";
|
|
|
|
|
static const char *badrange =
|
|
|
|
|
"cyc Warning: cyclades_port out of range for (%s) in %s\n";
|
|
|
|
|
|
|
|
|
|
if (!info) {
|
|
|
|
|
printk(badinfo, name, routine);
|
|
|
|
|
return 1;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if( (long)info < (long)(&cy_port[0])
|
|
|
|
|
|| (long)(&cy_port[NR_PORTS]) < (long)info ){
|
|
|
|
|
printk(badrange, name, routine);
|
|
|
|
|
return 1;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (info->magic != CYCLADES_MAGIC) {
|
|
|
|
|
printk(badmagic, name, routine);
|
|
|
|
|
return 1;
|
|
|
|
|
}
|
|
|
|
|
#endif
|
|
|
|
|
return 0;
|
|
|
|
|
} /* serial_paranoia_check */
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* This routine is used by the interrupt handler to schedule
|
|
|
|
|
* processing in the software interrupt portion of the driver
|
|
|
|
|
* (also known as the "bottom half"). This can be called any
|
|
|
|
|
* number of times for any channel without harm.
|
|
|
|
|
*/
|
|
|
|
|
static inline void
|
|
|
|
|
cy_sched_event(struct cyclades_port *info, int event)
|
|
|
|
|
{
|
|
|
|
|
info->event |= 1 << event; /* remember what kind of event and who */
|
|
|
|
|
schedule_work(&info->tqueue);
|
|
|
|
|
} /* cy_sched_event */
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* This routine is used to handle the "bottom half" processing for the
|
|
|
|
|
* serial driver, known also the "software interrupt" processing.
|
|
|
|
|
* This processing is done at the kernel interrupt level, after the
|
|
|
|
|
* cy#/_interrupt() has returned, BUT WITH INTERRUPTS TURNED ON. This
|
|
|
|
|
* is where time-consuming activities which can not be done in the
|
|
|
|
|
* interrupt driver proper are done; the interrupt driver schedules
|
|
|
|
|
* them using cy_sched_event(), and they get done here.
|
|
|
|
|
*
|
|
|
|
|
* This is done through one level of indirection--the task queue.
|
|
|
|
|
* When a hardware interrupt service routine wants service by the
|
|
|
|
|
* driver's bottom half, it enqueues the appropriate tq_struct (one
|
|
|
|
|
* per port) to the keventd work queue and sets a request flag
|
|
|
|
|
* that the work queue be processed.
|
|
|
|
|
*
|
|
|
|
|
* Although this may seem unwieldy, it gives the system a way to
|
|
|
|
|
* pass an argument (in this case the pointer to the cyclades_port
|
|
|
|
|
* structure) to the bottom half of the driver. Previous kernels
|
|
|
|
|
* had to poll every port to see if that port needed servicing.
|
|
|
|
|
*/
|
|
|
|
|
static void
|
|
|
|
|
do_softint(void *private_)
|
|
|
|
|
{
|
|
|
|
|
struct cyclades_port *info = (struct cyclades_port *) private_;
|
|
|
|
|
struct tty_struct *tty;
|
|
|
|
|
|
|
|
|
|
tty = info->tty;
|
|
|
|
|
if (!tty)
|
|
|
|
|
return;
|
|
|
|
|
|
|
|
|
|
if (test_and_clear_bit(Cy_EVENT_HANGUP, &info->event)) {
|
|
|
|
|
tty_hangup(info->tty);
|
|
|
|
|
wake_up_interruptible(&info->open_wait);
|
|
|
|
|
info->flags &= ~ASYNC_NORMAL_ACTIVE;
|
|
|
|
|
}
|
|
|
|
|
if (test_and_clear_bit(Cy_EVENT_OPEN_WAKEUP, &info->event)) {
|
|
|
|
|
wake_up_interruptible(&info->open_wait);
|
|
|
|
|
}
|
|
|
|
|
#ifdef CONFIG_CYZ_INTR
|
|
|
|
|
if (test_and_clear_bit(Cy_EVENT_Z_RX_FULL, &info->event)) {
|
|
|
|
|
if (cyz_rx_full_timer[info->line].function == NULL) {
|
|
|
|
|
cyz_rx_full_timer[info->line].expires = jiffies + 1;
|
|
|
|
|
cyz_rx_full_timer[info->line].function = cyz_rx_restart;
|
|
|
|
|
cyz_rx_full_timer[info->line].data = (unsigned long)info;
|
|
|
|
|
add_timer(&cyz_rx_full_timer[info->line]);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
#endif
|
|
|
|
|
if (test_and_clear_bit(Cy_EVENT_DELTA_WAKEUP, &info->event)) {
|
|
|
|
|
wake_up_interruptible(&info->delta_msr_wait);
|
|
|
|
|
}
|
|
|
|
|
if (test_and_clear_bit(Cy_EVENT_WRITE_WAKEUP, &info->event)) {
|
|
|
|
|
tty_wakeup(tty);
|
|
|
|
|
wake_up_interruptible(&tty->write_wait);
|
|
|
|
|
}
|
|
|
|
|
#ifdef Z_WAKE
|
|
|
|
|
if (test_and_clear_bit(Cy_EVENT_SHUTDOWN_WAKEUP, &info->event)) {
|
|
|
|
|
wake_up_interruptible(&info->shutdown_wait);
|
|
|
|
|
}
|
|
|
|
|
#endif
|
|
|
|
|
} /* do_softint */
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/***********************************************************/
|
|
|
|
|
/********* Start of block of Cyclom-Y specific code ********/
|
|
|
|
|
|
|
|
|
|
/* This routine waits up to 1000 micro-seconds for the previous
|
|
|
|
|
command to the Cirrus chip to complete and then issues the
|
|
|
|
|
new command. An error is returned if the previous command
|
|
|
|
|
didn't finish within the time limit.
|
|
|
|
|
|
|
|
|
|
This function is only called from inside spinlock-protected code.
|
|
|
|
|
*/
|
|
|
|
|
static int
|
|
|
|
|
cyy_issue_cmd(void __iomem *base_addr, u_char cmd, int index)
|
|
|
|
|
{
|
|
|
|
|
volatile int i;
|
|
|
|
|
|
|
|
|
|
/* Check to see that the previous command has completed */
|
|
|
|
|
for(i = 0 ; i < 100 ; i++){
|
|
|
|
|
if (cy_readb(base_addr+(CyCCR<<index)) == 0){
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
udelay(10L);
|
|
|
|
|
}
|
|
|
|
|
/* if the CCR never cleared, the previous command
|
|
|
|
|
didn't finish within the "reasonable time" */
|
|
|
|
|
if (i == 100) return (-1);
|
|
|
|
|
|
|
|
|
|
/* Issue the new command */
|
|
|
|
|
cy_writeb(base_addr+(CyCCR<<index), cmd);
|
|
|
|
|
|
|
|
|
|
return(0);
|
|
|
|
|
} /* cyy_issue_cmd */
|
|
|
|
|
|
|
|
|
|
#ifdef CONFIG_ISA
|
|
|
|
|
/* ISA interrupt detection code */
|
|
|
|
|
static unsigned
|
|
|
|
|
detect_isa_irq(void __iomem *address)
|
|
|
|
|
{
|
|
|
|
|
int irq;
|
|
|
|
|
unsigned long irqs, flags;
|
|
|
|
|
int save_xir, save_car;
|
|
|
|
|
int index = 0; /* IRQ probing is only for ISA */
|
|
|
|
|
|
|
|
|
|
/* forget possible initially masked and pending IRQ */
|
|
|
|
|
irq = probe_irq_off(probe_irq_on());
|
|
|
|
|
|
|
|
|
|
/* Clear interrupts on the board first */
|
|
|
|
|
cy_writeb(address + (Cy_ClrIntr<<index), 0);
|
|
|
|
|
/* Cy_ClrIntr is 0x1800 */
|
|
|
|
|
|
|
|
|
|
irqs = probe_irq_on();
|
|
|
|
|
/* Wait ... */
|
|
|
|
|
udelay(5000L);
|
|
|
|
|
|
|
|
|
|
/* Enable the Tx interrupts on the CD1400 */
|
|
|
|
|
local_irq_save(flags);
|
|
|
|
|
cy_writeb(address + (CyCAR<<index), 0);
|
|
|
|
|
cyy_issue_cmd(address, CyCHAN_CTL|CyENB_XMTR, index);
|
|
|
|
|
|
|
|
|
|
cy_writeb(address + (CyCAR<<index), 0);
|
|
|
|
|
cy_writeb(address + (CySRER<<index),
|
|
|
|
|
cy_readb(address + (CySRER<<index)) | CyTxRdy);
|
|
|
|
|
local_irq_restore(flags);
|
|
|
|
|
|
|
|
|
|
/* Wait ... */
|
|
|
|
|
udelay(5000L);
|
|
|
|
|
|
|
|
|
|
/* Check which interrupt is in use */
|
|
|
|
|
irq = probe_irq_off(irqs);
|
|
|
|
|
|
|
|
|
|
/* Clean up */
|
|
|
|
|
save_xir = (u_char) cy_readb(address + (CyTIR<<index));
|
|
|
|
|
save_car = cy_readb(address + (CyCAR<<index));
|
|
|
|
|
cy_writeb(address + (CyCAR<<index), (save_xir & 0x3));
|
|
|
|
|
cy_writeb(address + (CySRER<<index),
|
|
|
|
|
cy_readb(address + (CySRER<<index)) & ~CyTxRdy);
|
|
|
|
|
cy_writeb(address + (CyTIR<<index), (save_xir & 0x3f));
|
|
|
|
|
cy_writeb(address + (CyCAR<<index), (save_car));
|
|
|
|
|
cy_writeb(address + (Cy_ClrIntr<<index), 0);
|
|
|
|
|
/* Cy_ClrIntr is 0x1800 */
|
|
|
|
|
|
|
|
|
|
return (irq > 0)? irq : 0;
|
|
|
|
|
}
|
|
|
|
|
#endif /* CONFIG_ISA */
|
|
|
|
|
|
|
|
|
|
/* The real interrupt service routine is called
|
|
|
|
|
whenever the card wants its hand held--chars
|
|
|
|
|
received, out buffer empty, modem change, etc.
|
|
|
|
|
*/
|
|
|
|
|
static irqreturn_t
|
IRQ: Maintain regs pointer globally rather than passing to IRQ handlers
Maintain a per-CPU global "struct pt_regs *" variable which can be used instead
of passing regs around manually through all ~1800 interrupt handlers in the
Linux kernel.
The regs pointer is used in few places, but it potentially costs both stack
space and code to pass it around. On the FRV arch, removing the regs parameter
from all the genirq function results in a 20% speed up of the IRQ exit path
(ie: from leaving timer_interrupt() to leaving do_IRQ()).
Where appropriate, an arch may override the generic storage facility and do
something different with the variable. On FRV, for instance, the address is
maintained in GR28 at all times inside the kernel as part of general exception
handling.
Having looked over the code, it appears that the parameter may be handed down
through up to twenty or so layers of functions. Consider a USB character
device attached to a USB hub, attached to a USB controller that posts its
interrupts through a cascaded auxiliary interrupt controller. A character
device driver may want to pass regs to the sysrq handler through the input
layer which adds another few layers of parameter passing.
I've build this code with allyesconfig for x86_64 and i386. I've runtested the
main part of the code on FRV and i386, though I can't test most of the drivers.
I've also done partial conversion for powerpc and MIPS - these at least compile
with minimal configurations.
This will affect all archs. Mostly the changes should be relatively easy.
Take do_IRQ(), store the regs pointer at the beginning, saving the old one:
struct pt_regs *old_regs = set_irq_regs(regs);
And put the old one back at the end:
set_irq_regs(old_regs);
Don't pass regs through to generic_handle_irq() or __do_IRQ().
In timer_interrupt(), this sort of change will be necessary:
- update_process_times(user_mode(regs));
- profile_tick(CPU_PROFILING, regs);
+ update_process_times(user_mode(get_irq_regs()));
+ profile_tick(CPU_PROFILING);
I'd like to move update_process_times()'s use of get_irq_regs() into itself,
except that i386, alone of the archs, uses something other than user_mode().
Some notes on the interrupt handling in the drivers:
(*) input_dev() is now gone entirely. The regs pointer is no longer stored in
the input_dev struct.
(*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking. It does
something different depending on whether it's been supplied with a regs
pointer or not.
(*) Various IRQ handler function pointers have been moved to type
irq_handler_t.
Signed-Off-By: David Howells <dhowells@redhat.com>
(cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-05 13:55:46 +00:00
|
|
|
cyy_interrupt(int irq, void *dev_id)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
|
|
|
|
struct tty_struct *tty;
|
|
|
|
|
int status;
|
|
|
|
|
struct cyclades_card *cinfo;
|
|
|
|
|
struct cyclades_port *info;
|
|
|
|
|
void __iomem *base_addr, *card_base_addr;
|
|
|
|
|
int chip;
|
|
|
|
|
int save_xir, channel, save_car;
|
|
|
|
|
char data;
|
|
|
|
|
volatile int char_count;
|
|
|
|
|
int outch;
|
|
|
|
|
int i,j,index;
|
|
|
|
|
int too_many;
|
|
|
|
|
int had_work;
|
|
|
|
|
int mdm_change;
|
|
|
|
|
int mdm_status;
|
[PATCH] TTY layer buffering revamp
The API and code have been through various bits of initial review by
serial driver people but they definitely need to live somewhere for a
while so the unconverted drivers can get knocked into shape, existing
drivers that have been updated can be better tuned and bugs whacked out.
This replaces the tty flip buffers with kmalloc objects in rings. In the
normal situation for an IRQ driven serial port at typical speeds the
behaviour is pretty much the same, two buffers end up allocated and the
kernel cycles between them as before.
When there are delays or at high speed we now behave far better as the
buffer pool can grow a bit rather than lose characters. This also means
that we can operate at higher speeds reliably.
For drivers that receive characters in blocks (DMA based, USB and
especially virtualisation) the layer allows a lot of driver specific
code that works around the tty layer with private secondary queues to be
removed. The IBM folks need this sort of layer, the smart serial port
people do, the virtualisers do (because a virtualised tty typically
operates at infinite speed rather than emulating 9600 baud).
Finally many drivers had invalid and unsafe attempts to avoid buffer
overflows by directly invoking tty methods extracted out of the innards
of work queue structs. These are no longer needed and all go away. That
fixes various random hangs with serial ports on overflow.
The other change in here is to optimise the receive_room path that is
used by some callers. It turns out that only one ldisc uses receive room
except asa constant and it updates it far far less than the value is
read. We thus make it a variable not a function call.
I expect the code to contain bugs due to the size alone but I'll be
watching and squashing them and feeding out new patches as it goes.
Because the buffers now dynamically expand you should only run out of
buffering when the kernel runs out of memory for real. That means a lot of
the horrible hacks high performance drivers used to do just aren't needed any
more.
Description:
tty_insert_flip_char is an old API and continues to work as before, as does
tty_flip_buffer_push() [this is why many drivers dont need modification]. It
does now also return the number of chars inserted
There are also
tty_buffer_request_room(tty, len)
which asks for a buffer block of the length requested and returns the space
found. This improves efficiency with hardware that knows how much to
transfer.
and tty_insert_flip_string_flags(tty, str, flags, len)
to insert a string of characters and flags
For a smart interface the usual code is
len = tty_request_buffer_room(tty, amount_hardware_says);
tty_insert_flip_string(tty, buffer_from_card, len);
More description!
At the moment tty buffers are attached directly to the tty. This is causing a
lot of the problems related to tty layer locking, also problems at high speed
and also with bursty data (such as occurs in virtualised environments)
I'm working on ripping out the flip buffers and replacing them with a pool of
dynamically allocated buffers. This allows both for old style "byte I/O"
devices and also helps virtualisation and smart devices where large blocks of
data suddenely materialise and need storing.
So far so good. Lots of drivers reference tty->flip.*. Several of them also
call directly and unsafely into function pointers it provides. This will all
break. Most drivers can use tty_insert_flip_char which can be kept as an API
but others need more.
At the moment I've added the following interfaces, if people think more will
be needed now is a good time to say
int tty_buffer_request_room(tty, size)
Try and ensure at least size bytes are available, returns actual room (may be
zero). At the moment it just uses the flipbuf space but that will change.
Repeated calls without characters being added are not cumulative. (ie if you
call it with 1, 1, 1, and then 4 you'll have four characters of space. The
other functions will also try and grow buffers in future but this will be a
more efficient way when you know block sizes.
int tty_insert_flip_char(tty, ch, flag)
As before insert a character if there is room. Now returns 1 for success, 0
for failure.
int tty_insert_flip_string(tty, str, len)
Insert a block of non error characters. Returns the number inserted.
int tty_prepare_flip_string(tty, strptr, len)
Adjust the buffer to allow len characters to be added. Returns a buffer
pointer in strptr and the length available. This allows for hardware that
needs to use functions like insl or mencpy_fromio.
Signed-off-by: Alan Cox <alan@redhat.com>
Cc: Paul Fulghum <paulkf@microgate.com>
Signed-off-by: Hirokazu Takata <takata@linux-m32r.org>
Signed-off-by: Serge Hallyn <serue@us.ibm.com>
Signed-off-by: Jeff Dike <jdike@addtoit.com>
Signed-off-by: John Hawkes <hawkes@sgi.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10 04:54:13 +00:00
|
|
|
int len;
|
2005-04-16 22:20:36 +00:00
|
|
|
if((cinfo = (struct cyclades_card *)dev_id) == 0){
|
|
|
|
|
#ifdef CY_DEBUG_INTERRUPTS
|
|
|
|
|
printk("cyy_interrupt: spurious interrupt %d\n\r", irq);
|
|
|
|
|
#endif
|
|
|
|
|
return IRQ_NONE; /* spurious interrupt */
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
card_base_addr = cinfo->base_addr;
|
|
|
|
|
index = cinfo->bus_index;
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/* This loop checks all chips in the card. Make a note whenever
|
|
|
|
|
_any_ chip had some work to do, as this is considered an
|
|
|
|
|
indication that there will be more to do. Only when no chip
|
|
|
|
|
has any work does this outermost loop exit.
|
|
|
|
|
*/
|
|
|
|
|
do{
|
|
|
|
|
had_work = 0;
|
|
|
|
|
for ( chip = 0 ; chip < cinfo->num_chips ; chip ++) {
|
|
|
|
|
base_addr = cinfo->base_addr + (cy_chip_offset[chip]<<index);
|
|
|
|
|
too_many = 0;
|
|
|
|
|
while ( (status = cy_readb(base_addr+(CySVRR<<index))) != 0x00) {
|
|
|
|
|
had_work++;
|
|
|
|
|
/* The purpose of the following test is to ensure that
|
|
|
|
|
no chip can monopolize the driver. This forces the
|
|
|
|
|
chips to be checked in a round-robin fashion (after
|
|
|
|
|
draining each of a bunch (1000) of characters).
|
|
|
|
|
*/
|
|
|
|
|
if(1000<too_many++){
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
if (status & CySRReceive) { /* reception interrupt */
|
|
|
|
|
#ifdef CY_DEBUG_INTERRUPTS
|
|
|
|
|
printk("cyy_interrupt: rcvd intr, chip %d\n\r", chip);
|
|
|
|
|
#endif
|
|
|
|
|
/* determine the channel & change to that context */
|
|
|
|
|
spin_lock(&cinfo->card_lock);
|
|
|
|
|
save_xir = (u_char) cy_readb(base_addr+(CyRIR<<index));
|
|
|
|
|
channel = (u_short ) (save_xir & CyIRChannel);
|
|
|
|
|
i = channel + chip * 4 + cinfo->first_line;
|
|
|
|
|
info = &cy_port[i];
|
|
|
|
|
info->last_active = jiffies;
|
|
|
|
|
save_car = cy_readb(base_addr+(CyCAR<<index));
|
|
|
|
|
cy_writeb(base_addr+(CyCAR<<index), save_xir);
|
|
|
|
|
|
|
|
|
|
/* if there is nowhere to put the data, discard it */
|
|
|
|
|
if(info->tty == 0){
|
|
|
|
|
j = (cy_readb(base_addr+(CyRIVR<<index)) & CyIVRMask);
|
|
|
|
|
if ( j == CyIVRRxEx ) { /* exception */
|
|
|
|
|
data = cy_readb(base_addr+(CyRDSR<<index));
|
|
|
|
|
} else { /* normal character reception */
|
|
|
|
|
char_count = cy_readb(base_addr+(CyRDCR<<index));
|
|
|
|
|
while(char_count--){
|
|
|
|
|
data = cy_readb(base_addr+(CyRDSR<<index));
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}else{ /* there is an open port for this data */
|
|
|
|
|
tty = info->tty;
|
|
|
|
|
j = (cy_readb(base_addr+(CyRIVR<<index)) & CyIVRMask);
|
|
|
|
|
if ( j == CyIVRRxEx ) { /* exception */
|
|
|
|
|
data = cy_readb(base_addr+(CyRDSR<<index));
|
|
|
|
|
|
|
|
|
|
/* For statistics only */
|
|
|
|
|
if (data & CyBREAK)
|
|
|
|
|
info->icount.brk++;
|
|
|
|
|
else if(data & CyFRAME)
|
|
|
|
|
info->icount.frame++;
|
|
|
|
|
else if(data & CyPARITY)
|
|
|
|
|
info->icount.parity++;
|
|
|
|
|
else if(data & CyOVERRUN)
|
|
|
|
|
info->icount.overrun++;
|
|
|
|
|
|
|
|
|
|
if(data & info->ignore_status_mask){
|
|
|
|
|
info->icount.rx++;
|
|
|
|
|
continue;
|
|
|
|
|
}
|
[PATCH] TTY layer buffering revamp
The API and code have been through various bits of initial review by
serial driver people but they definitely need to live somewhere for a
while so the unconverted drivers can get knocked into shape, existing
drivers that have been updated can be better tuned and bugs whacked out.
This replaces the tty flip buffers with kmalloc objects in rings. In the
normal situation for an IRQ driven serial port at typical speeds the
behaviour is pretty much the same, two buffers end up allocated and the
kernel cycles between them as before.
When there are delays or at high speed we now behave far better as the
buffer pool can grow a bit rather than lose characters. This also means
that we can operate at higher speeds reliably.
For drivers that receive characters in blocks (DMA based, USB and
especially virtualisation) the layer allows a lot of driver specific
code that works around the tty layer with private secondary queues to be
removed. The IBM folks need this sort of layer, the smart serial port
people do, the virtualisers do (because a virtualised tty typically
operates at infinite speed rather than emulating 9600 baud).
Finally many drivers had invalid and unsafe attempts to avoid buffer
overflows by directly invoking tty methods extracted out of the innards
of work queue structs. These are no longer needed and all go away. That
fixes various random hangs with serial ports on overflow.
The other change in here is to optimise the receive_room path that is
used by some callers. It turns out that only one ldisc uses receive room
except asa constant and it updates it far far less than the value is
read. We thus make it a variable not a function call.
I expect the code to contain bugs due to the size alone but I'll be
watching and squashing them and feeding out new patches as it goes.
Because the buffers now dynamically expand you should only run out of
buffering when the kernel runs out of memory for real. That means a lot of
the horrible hacks high performance drivers used to do just aren't needed any
more.
Description:
tty_insert_flip_char is an old API and continues to work as before, as does
tty_flip_buffer_push() [this is why many drivers dont need modification]. It
does now also return the number of chars inserted
There are also
tty_buffer_request_room(tty, len)
which asks for a buffer block of the length requested and returns the space
found. This improves efficiency with hardware that knows how much to
transfer.
and tty_insert_flip_string_flags(tty, str, flags, len)
to insert a string of characters and flags
For a smart interface the usual code is
len = tty_request_buffer_room(tty, amount_hardware_says);
tty_insert_flip_string(tty, buffer_from_card, len);
More description!
At the moment tty buffers are attached directly to the tty. This is causing a
lot of the problems related to tty layer locking, also problems at high speed
and also with bursty data (such as occurs in virtualised environments)
I'm working on ripping out the flip buffers and replacing them with a pool of
dynamically allocated buffers. This allows both for old style "byte I/O"
devices and also helps virtualisation and smart devices where large blocks of
data suddenely materialise and need storing.
So far so good. Lots of drivers reference tty->flip.*. Several of them also
call directly and unsafely into function pointers it provides. This will all
break. Most drivers can use tty_insert_flip_char which can be kept as an API
but others need more.
At the moment I've added the following interfaces, if people think more will
be needed now is a good time to say
int tty_buffer_request_room(tty, size)
Try and ensure at least size bytes are available, returns actual room (may be
zero). At the moment it just uses the flipbuf space but that will change.
Repeated calls without characters being added are not cumulative. (ie if you
call it with 1, 1, 1, and then 4 you'll have four characters of space. The
other functions will also try and grow buffers in future but this will be a
more efficient way when you know block sizes.
int tty_insert_flip_char(tty, ch, flag)
As before insert a character if there is room. Now returns 1 for success, 0
for failure.
int tty_insert_flip_string(tty, str, len)
Insert a block of non error characters. Returns the number inserted.
int tty_prepare_flip_string(tty, strptr, len)
Adjust the buffer to allow len characters to be added. Returns a buffer
pointer in strptr and the length available. This allows for hardware that
needs to use functions like insl or mencpy_fromio.
Signed-off-by: Alan Cox <alan@redhat.com>
Cc: Paul Fulghum <paulkf@microgate.com>
Signed-off-by: Hirokazu Takata <takata@linux-m32r.org>
Signed-off-by: Serge Hallyn <serue@us.ibm.com>
Signed-off-by: Jeff Dike <jdike@addtoit.com>
Signed-off-by: John Hawkes <hawkes@sgi.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10 04:54:13 +00:00
|
|
|
if (tty_buffer_request_room(tty, 1)) {
|
2005-04-16 22:20:36 +00:00
|
|
|
if (data & info->read_status_mask){
|
|
|
|
|
if(data & CyBREAK){
|
[PATCH] TTY layer buffering revamp
The API and code have been through various bits of initial review by
serial driver people but they definitely need to live somewhere for a
while so the unconverted drivers can get knocked into shape, existing
drivers that have been updated can be better tuned and bugs whacked out.
This replaces the tty flip buffers with kmalloc objects in rings. In the
normal situation for an IRQ driven serial port at typical speeds the
behaviour is pretty much the same, two buffers end up allocated and the
kernel cycles between them as before.
When there are delays or at high speed we now behave far better as the
buffer pool can grow a bit rather than lose characters. This also means
that we can operate at higher speeds reliably.
For drivers that receive characters in blocks (DMA based, USB and
especially virtualisation) the layer allows a lot of driver specific
code that works around the tty layer with private secondary queues to be
removed. The IBM folks need this sort of layer, the smart serial port
people do, the virtualisers do (because a virtualised tty typically
operates at infinite speed rather than emulating 9600 baud).
Finally many drivers had invalid and unsafe attempts to avoid buffer
overflows by directly invoking tty methods extracted out of the innards
of work queue structs. These are no longer needed and all go away. That
fixes various random hangs with serial ports on overflow.
The other change in here is to optimise the receive_room path that is
used by some callers. It turns out that only one ldisc uses receive room
except asa constant and it updates it far far less than the value is
read. We thus make it a variable not a function call.
I expect the code to contain bugs due to the size alone but I'll be
watching and squashing them and feeding out new patches as it goes.
Because the buffers now dynamically expand you should only run out of
buffering when the kernel runs out of memory for real. That means a lot of
the horrible hacks high performance drivers used to do just aren't needed any
more.
Description:
tty_insert_flip_char is an old API and continues to work as before, as does
tty_flip_buffer_push() [this is why many drivers dont need modification]. It
does now also return the number of chars inserted
There are also
tty_buffer_request_room(tty, len)
which asks for a buffer block of the length requested and returns the space
found. This improves efficiency with hardware that knows how much to
transfer.
and tty_insert_flip_string_flags(tty, str, flags, len)
to insert a string of characters and flags
For a smart interface the usual code is
len = tty_request_buffer_room(tty, amount_hardware_says);
tty_insert_flip_string(tty, buffer_from_card, len);
More description!
At the moment tty buffers are attached directly to the tty. This is causing a
lot of the problems related to tty layer locking, also problems at high speed
and also with bursty data (such as occurs in virtualised environments)
I'm working on ripping out the flip buffers and replacing them with a pool of
dynamically allocated buffers. This allows both for old style "byte I/O"
devices and also helps virtualisation and smart devices where large blocks of
data suddenely materialise and need storing.
So far so good. Lots of drivers reference tty->flip.*. Several of them also
call directly and unsafely into function pointers it provides. This will all
break. Most drivers can use tty_insert_flip_char which can be kept as an API
but others need more.
At the moment I've added the following interfaces, if people think more will
be needed now is a good time to say
int tty_buffer_request_room(tty, size)
Try and ensure at least size bytes are available, returns actual room (may be
zero). At the moment it just uses the flipbuf space but that will change.
Repeated calls without characters being added are not cumulative. (ie if you
call it with 1, 1, 1, and then 4 you'll have four characters of space. The
other functions will also try and grow buffers in future but this will be a
more efficient way when you know block sizes.
int tty_insert_flip_char(tty, ch, flag)
As before insert a character if there is room. Now returns 1 for success, 0
for failure.
int tty_insert_flip_string(tty, str, len)
Insert a block of non error characters. Returns the number inserted.
int tty_prepare_flip_string(tty, strptr, len)
Adjust the buffer to allow len characters to be added. Returns a buffer
pointer in strptr and the length available. This allows for hardware that
needs to use functions like insl or mencpy_fromio.
Signed-off-by: Alan Cox <alan@redhat.com>
Cc: Paul Fulghum <paulkf@microgate.com>
Signed-off-by: Hirokazu Takata <takata@linux-m32r.org>
Signed-off-by: Serge Hallyn <serue@us.ibm.com>
Signed-off-by: Jeff Dike <jdike@addtoit.com>
Signed-off-by: John Hawkes <hawkes@sgi.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10 04:54:13 +00:00
|
|
|
tty_insert_flip_char(tty, cy_readb(base_addr+(CyRDSR<<index)), TTY_BREAK);
|
2005-04-16 22:20:36 +00:00
|
|
|
info->icount.rx++;
|
|
|
|
|
if (info->flags & ASYNC_SAK){
|
|
|
|
|
do_SAK(tty);
|
|
|
|
|
}
|
|
|
|
|
}else if(data & CyFRAME){
|
[PATCH] TTY layer buffering revamp
The API and code have been through various bits of initial review by
serial driver people but they definitely need to live somewhere for a
while so the unconverted drivers can get knocked into shape, existing
drivers that have been updated can be better tuned and bugs whacked out.
This replaces the tty flip buffers with kmalloc objects in rings. In the
normal situation for an IRQ driven serial port at typical speeds the
behaviour is pretty much the same, two buffers end up allocated and the
kernel cycles between them as before.
When there are delays or at high speed we now behave far better as the
buffer pool can grow a bit rather than lose characters. This also means
that we can operate at higher speeds reliably.
For drivers that receive characters in blocks (DMA based, USB and
especially virtualisation) the layer allows a lot of driver specific
code that works around the tty layer with private secondary queues to be
removed. The IBM folks need this sort of layer, the smart serial port
people do, the virtualisers do (because a virtualised tty typically
operates at infinite speed rather than emulating 9600 baud).
Finally many drivers had invalid and unsafe attempts to avoid buffer
overflows by directly invoking tty methods extracted out of the innards
of work queue structs. These are no longer needed and all go away. That
fixes various random hangs with serial ports on overflow.
The other change in here is to optimise the receive_room path that is
used by some callers. It turns out that only one ldisc uses receive room
except asa constant and it updates it far far less than the value is
read. We thus make it a variable not a function call.
I expect the code to contain bugs due to the size alone but I'll be
watching and squashing them and feeding out new patches as it goes.
Because the buffers now dynamically expand you should only run out of
buffering when the kernel runs out of memory for real. That means a lot of
the horrible hacks high performance drivers used to do just aren't needed any
more.
Description:
tty_insert_flip_char is an old API and continues to work as before, as does
tty_flip_buffer_push() [this is why many drivers dont need modification]. It
does now also return the number of chars inserted
There are also
tty_buffer_request_room(tty, len)
which asks for a buffer block of the length requested and returns the space
found. This improves efficiency with hardware that knows how much to
transfer.
and tty_insert_flip_string_flags(tty, str, flags, len)
to insert a string of characters and flags
For a smart interface the usual code is
len = tty_request_buffer_room(tty, amount_hardware_says);
tty_insert_flip_string(tty, buffer_from_card, len);
More description!
At the moment tty buffers are attached directly to the tty. This is causing a
lot of the problems related to tty layer locking, also problems at high speed
and also with bursty data (such as occurs in virtualised environments)
I'm working on ripping out the flip buffers and replacing them with a pool of
dynamically allocated buffers. This allows both for old style "byte I/O"
devices and also helps virtualisation and smart devices where large blocks of
data suddenely materialise and need storing.
So far so good. Lots of drivers reference tty->flip.*. Several of them also
call directly and unsafely into function pointers it provides. This will all
break. Most drivers can use tty_insert_flip_char which can be kept as an API
but others need more.
At the moment I've added the following interfaces, if people think more will
be needed now is a good time to say
int tty_buffer_request_room(tty, size)
Try and ensure at least size bytes are available, returns actual room (may be
zero). At the moment it just uses the flipbuf space but that will change.
Repeated calls without characters being added are not cumulative. (ie if you
call it with 1, 1, 1, and then 4 you'll have four characters of space. The
other functions will also try and grow buffers in future but this will be a
more efficient way when you know block sizes.
int tty_insert_flip_char(tty, ch, flag)
As before insert a character if there is room. Now returns 1 for success, 0
for failure.
int tty_insert_flip_string(tty, str, len)
Insert a block of non error characters. Returns the number inserted.
int tty_prepare_flip_string(tty, strptr, len)
Adjust the buffer to allow len characters to be added. Returns a buffer
pointer in strptr and the length available. This allows for hardware that
needs to use functions like insl or mencpy_fromio.
Signed-off-by: Alan Cox <alan@redhat.com>
Cc: Paul Fulghum <paulkf@microgate.com>
Signed-off-by: Hirokazu Takata <takata@linux-m32r.org>
Signed-off-by: Serge Hallyn <serue@us.ibm.com>
Signed-off-by: Jeff Dike <jdike@addtoit.com>
Signed-off-by: John Hawkes <hawkes@sgi.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10 04:54:13 +00:00
|
|
|
tty_insert_flip_char(tty, cy_readb(base_addr+(CyRDSR<<index)), TTY_FRAME);
|
2005-04-16 22:20:36 +00:00
|
|
|
info->icount.rx++;
|
|
|
|
|
info->idle_stats.frame_errs++;
|
|
|
|
|
}else if(data & CyPARITY){
|
[PATCH] TTY layer buffering revamp
The API and code have been through various bits of initial review by
serial driver people but they definitely need to live somewhere for a
while so the unconverted drivers can get knocked into shape, existing
drivers that have been updated can be better tuned and bugs whacked out.
This replaces the tty flip buffers with kmalloc objects in rings. In the
normal situation for an IRQ driven serial port at typical speeds the
behaviour is pretty much the same, two buffers end up allocated and the
kernel cycles between them as before.
When there are delays or at high speed we now behave far better as the
buffer pool can grow a bit rather than lose characters. This also means
that we can operate at higher speeds reliably.
For drivers that receive characters in blocks (DMA based, USB and
especially virtualisation) the layer allows a lot of driver specific
code that works around the tty layer with private secondary queues to be
removed. The IBM folks need this sort of layer, the smart serial port
people do, the virtualisers do (because a virtualised tty typically
operates at infinite speed rather than emulating 9600 baud).
Finally many drivers had invalid and unsafe attempts to avoid buffer
overflows by directly invoking tty methods extracted out of the innards
of work queue structs. These are no longer needed and all go away. That
fixes various random hangs with serial ports on overflow.
The other change in here is to optimise the receive_room path that is
used by some callers. It turns out that only one ldisc uses receive room
except asa constant and it updates it far far less than the value is
read. We thus make it a variable not a function call.
I expect the code to contain bugs due to the size alone but I'll be
watching and squashing them and feeding out new patches as it goes.
Because the buffers now dynamically expand you should only run out of
buffering when the kernel runs out of memory for real. That means a lot of
the horrible hacks high performance drivers used to do just aren't needed any
more.
Description:
tty_insert_flip_char is an old API and continues to work as before, as does
tty_flip_buffer_push() [this is why many drivers dont need modification]. It
does now also return the number of chars inserted
There are also
tty_buffer_request_room(tty, len)
which asks for a buffer block of the length requested and returns the space
found. This improves efficiency with hardware that knows how much to
transfer.
and tty_insert_flip_string_flags(tty, str, flags, len)
to insert a string of characters and flags
For a smart interface the usual code is
len = tty_request_buffer_room(tty, amount_hardware_says);
tty_insert_flip_string(tty, buffer_from_card, len);
More description!
At the moment tty buffers are attached directly to the tty. This is causing a
lot of the problems related to tty layer locking, also problems at high speed
and also with bursty data (such as occurs in virtualised environments)
I'm working on ripping out the flip buffers and replacing them with a pool of
dynamically allocated buffers. This allows both for old style "byte I/O"
devices and also helps virtualisation and smart devices where large blocks of
data suddenely materialise and need storing.
So far so good. Lots of drivers reference tty->flip.*. Several of them also
call directly and unsafely into function pointers it provides. This will all
break. Most drivers can use tty_insert_flip_char which can be kept as an API
but others need more.
At the moment I've added the following interfaces, if people think more will
be needed now is a good time to say
int tty_buffer_request_room(tty, size)
Try and ensure at least size bytes are available, returns actual room (may be
zero). At the moment it just uses the flipbuf space but that will change.
Repeated calls without characters being added are not cumulative. (ie if you
call it with 1, 1, 1, and then 4 you'll have four characters of space. The
other functions will also try and grow buffers in future but this will be a
more efficient way when you know block sizes.
int tty_insert_flip_char(tty, ch, flag)
As before insert a character if there is room. Now returns 1 for success, 0
for failure.
int tty_insert_flip_string(tty, str, len)
Insert a block of non error characters. Returns the number inserted.
int tty_prepare_flip_string(tty, strptr, len)
Adjust the buffer to allow len characters to be added. Returns a buffer
pointer in strptr and the length available. This allows for hardware that
needs to use functions like insl or mencpy_fromio.
Signed-off-by: Alan Cox <alan@redhat.com>
Cc: Paul Fulghum <paulkf@microgate.com>
Signed-off-by: Hirokazu Takata <takata@linux-m32r.org>
Signed-off-by: Serge Hallyn <serue@us.ibm.com>
Signed-off-by: Jeff Dike <jdike@addtoit.com>
Signed-off-by: John Hawkes <hawkes@sgi.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10 04:54:13 +00:00
|
|
|
/* Pieces of seven... */
|
|
|
|
|
tty_insert_flip_char(tty, cy_readb(base_addr+(CyRDSR<<index)), TTY_PARITY);
|
2005-04-16 22:20:36 +00:00
|
|
|
info->icount.rx++;
|
|
|
|
|
info->idle_stats.parity_errs++;
|
|
|
|
|
}else if(data & CyOVERRUN){
|
[PATCH] TTY layer buffering revamp
The API and code have been through various bits of initial review by
serial driver people but they definitely need to live somewhere for a
while so the unconverted drivers can get knocked into shape, existing
drivers that have been updated can be better tuned and bugs whacked out.
This replaces the tty flip buffers with kmalloc objects in rings. In the
normal situation for an IRQ driven serial port at typical speeds the
behaviour is pretty much the same, two buffers end up allocated and the
kernel cycles between them as before.
When there are delays or at high speed we now behave far better as the
buffer pool can grow a bit rather than lose characters. This also means
that we can operate at higher speeds reliably.
For drivers that receive characters in blocks (DMA based, USB and
especially virtualisation) the layer allows a lot of driver specific
code that works around the tty layer with private secondary queues to be
removed. The IBM folks need this sort of layer, the smart serial port
people do, the virtualisers do (because a virtualised tty typically
operates at infinite speed rather than emulating 9600 baud).
Finally many drivers had invalid and unsafe attempts to avoid buffer
overflows by directly invoking tty methods extracted out of the innards
of work queue structs. These are no longer needed and all go away. That
fixes various random hangs with serial ports on overflow.
The other change in here is to optimise the receive_room path that is
used by some callers. It turns out that only one ldisc uses receive room
except asa constant and it updates it far far less than the value is
read. We thus make it a variable not a function call.
I expect the code to contain bugs due to the size alone but I'll be
watching and squashing them and feeding out new patches as it goes.
Because the buffers now dynamically expand you should only run out of
buffering when the kernel runs out of memory for real. That means a lot of
the horrible hacks high performance drivers used to do just aren't needed any
more.
Description:
tty_insert_flip_char is an old API and continues to work as before, as does
tty_flip_buffer_push() [this is why many drivers dont need modification]. It
does now also return the number of chars inserted
There are also
tty_buffer_request_room(tty, len)
which asks for a buffer block of the length requested and returns the space
found. This improves efficiency with hardware that knows how much to
transfer.
and tty_insert_flip_string_flags(tty, str, flags, len)
to insert a string of characters and flags
For a smart interface the usual code is
len = tty_request_buffer_room(tty, amount_hardware_says);
tty_insert_flip_string(tty, buffer_from_card, len);
More description!
At the moment tty buffers are attached directly to the tty. This is causing a
lot of the problems related to tty layer locking, also problems at high speed
and also with bursty data (such as occurs in virtualised environments)
I'm working on ripping out the flip buffers and replacing them with a pool of
dynamically allocated buffers. This allows both for old style "byte I/O"
devices and also helps virtualisation and smart devices where large blocks of
data suddenely materialise and need storing.
So far so good. Lots of drivers reference tty->flip.*. Several of them also
call directly and unsafely into function pointers it provides. This will all
break. Most drivers can use tty_insert_flip_char which can be kept as an API
but others need more.
At the moment I've added the following interfaces, if people think more will
be needed now is a good time to say
int tty_buffer_request_room(tty, size)
Try and ensure at least size bytes are available, returns actual room (may be
zero). At the moment it just uses the flipbuf space but that will change.
Repeated calls without characters being added are not cumulative. (ie if you
call it with 1, 1, 1, and then 4 you'll have four characters of space. The
other functions will also try and grow buffers in future but this will be a
more efficient way when you know block sizes.
int tty_insert_flip_char(tty, ch, flag)
As before insert a character if there is room. Now returns 1 for success, 0
for failure.
int tty_insert_flip_string(tty, str, len)
Insert a block of non error characters. Returns the number inserted.
int tty_prepare_flip_string(tty, strptr, len)
Adjust the buffer to allow len characters to be added. Returns a buffer
pointer in strptr and the length available. This allows for hardware that
needs to use functions like insl or mencpy_fromio.
Signed-off-by: Alan Cox <alan@redhat.com>
Cc: Paul Fulghum <paulkf@microgate.com>
Signed-off-by: Hirokazu Takata <takata@linux-m32r.org>
Signed-off-by: Serge Hallyn <serue@us.ibm.com>
Signed-off-by: Jeff Dike <jdike@addtoit.com>
Signed-off-by: John Hawkes <hawkes@sgi.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10 04:54:13 +00:00
|
|
|
tty_insert_flip_char(tty, 0, TTY_OVERRUN);
|
2005-04-16 22:20:36 +00:00
|
|
|
info->icount.rx++;
|
|
|
|
|
/* If the flip buffer itself is
|
|
|
|
|
overflowing, we still lose
|
|
|
|
|
the next incoming character.
|
|
|
|
|
*/
|
[PATCH] TTY layer buffering revamp
The API and code have been through various bits of initial review by
serial driver people but they definitely need to live somewhere for a
while so the unconverted drivers can get knocked into shape, existing
drivers that have been updated can be better tuned and bugs whacked out.
This replaces the tty flip buffers with kmalloc objects in rings. In the
normal situation for an IRQ driven serial port at typical speeds the
behaviour is pretty much the same, two buffers end up allocated and the
kernel cycles between them as before.
When there are delays or at high speed we now behave far better as the
buffer pool can grow a bit rather than lose characters. This also means
that we can operate at higher speeds reliably.
For drivers that receive characters in blocks (DMA based, USB and
especially virtualisation) the layer allows a lot of driver specific
code that works around the tty layer with private secondary queues to be
removed. The IBM folks need this sort of layer, the smart serial port
people do, the virtualisers do (because a virtualised tty typically
operates at infinite speed rather than emulating 9600 baud).
Finally many drivers had invalid and unsafe attempts to avoid buffer
overflows by directly invoking tty methods extracted out of the innards
of work queue structs. These are no longer needed and all go away. That
fixes various random hangs with serial ports on overflow.
The other change in here is to optimise the receive_room path that is
used by some callers. It turns out that only one ldisc uses receive room
except asa constant and it updates it far far less than the value is
read. We thus make it a variable not a function call.
I expect the code to contain bugs due to the size alone but I'll be
watching and squashing them and feeding out new patches as it goes.
Because the buffers now dynamically expand you should only run out of
buffering when the kernel runs out of memory for real. That means a lot of
the horrible hacks high performance drivers used to do just aren't needed any
more.
Description:
tty_insert_flip_char is an old API and continues to work as before, as does
tty_flip_buffer_push() [this is why many drivers dont need modification]. It
does now also return the number of chars inserted
There are also
tty_buffer_request_room(tty, len)
which asks for a buffer block of the length requested and returns the space
found. This improves efficiency with hardware that knows how much to
transfer.
and tty_insert_flip_string_flags(tty, str, flags, len)
to insert a string of characters and flags
For a smart interface the usual code is
len = tty_request_buffer_room(tty, amount_hardware_says);
tty_insert_flip_string(tty, buffer_from_card, len);
More description!
At the moment tty buffers are attached directly to the tty. This is causing a
lot of the problems related to tty layer locking, also problems at high speed
and also with bursty data (such as occurs in virtualised environments)
I'm working on ripping out the flip buffers and replacing them with a pool of
dynamically allocated buffers. This allows both for old style "byte I/O"
devices and also helps virtualisation and smart devices where large blocks of
data suddenely materialise and need storing.
So far so good. Lots of drivers reference tty->flip.*. Several of them also
call directly and unsafely into function pointers it provides. This will all
break. Most drivers can use tty_insert_flip_char which can be kept as an API
but others need more.
At the moment I've added the following interfaces, if people think more will
be needed now is a good time to say
int tty_buffer_request_room(tty, size)
Try and ensure at least size bytes are available, returns actual room (may be
zero). At the moment it just uses the flipbuf space but that will change.
Repeated calls without characters being added are not cumulative. (ie if you
call it with 1, 1, 1, and then 4 you'll have four characters of space. The
other functions will also try and grow buffers in future but this will be a
more efficient way when you know block sizes.
int tty_insert_flip_char(tty, ch, flag)
As before insert a character if there is room. Now returns 1 for success, 0
for failure.
int tty_insert_flip_string(tty, str, len)
Insert a block of non error characters. Returns the number inserted.
int tty_prepare_flip_string(tty, strptr, len)
Adjust the buffer to allow len characters to be added. Returns a buffer
pointer in strptr and the length available. This allows for hardware that
needs to use functions like insl or mencpy_fromio.
Signed-off-by: Alan Cox <alan@redhat.com>
Cc: Paul Fulghum <paulkf@microgate.com>
Signed-off-by: Hirokazu Takata <takata@linux-m32r.org>
Signed-off-by: Serge Hallyn <serue@us.ibm.com>
Signed-off-by: Jeff Dike <jdike@addtoit.com>
Signed-off-by: John Hawkes <hawkes@sgi.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10 04:54:13 +00:00
|
|
|
tty_insert_flip_char(tty, cy_readb(base_addr+(CyRDSR<<index)), TTY_FRAME);
|
|
|
|
|
info->icount.rx++;
|
2005-04-16 22:20:36 +00:00
|
|
|
info->idle_stats.overruns++;
|
|
|
|
|
/* These two conditions may imply */
|
|
|
|
|
/* a normal read should be done. */
|
|
|
|
|
/* }else if(data & CyTIMEOUT){ */
|
|
|
|
|
/* }else if(data & CySPECHAR){ */
|
[PATCH] TTY layer buffering revamp
The API and code have been through various bits of initial review by
serial driver people but they definitely need to live somewhere for a
while so the unconverted drivers can get knocked into shape, existing
drivers that have been updated can be better tuned and bugs whacked out.
This replaces the tty flip buffers with kmalloc objects in rings. In the
normal situation for an IRQ driven serial port at typical speeds the
behaviour is pretty much the same, two buffers end up allocated and the
kernel cycles between them as before.
When there are delays or at high speed we now behave far better as the
buffer pool can grow a bit rather than lose characters. This also means
that we can operate at higher speeds reliably.
For drivers that receive characters in blocks (DMA based, USB and
especially virtualisation) the layer allows a lot of driver specific
code that works around the tty layer with private secondary queues to be
removed. The IBM folks need this sort of layer, the smart serial port
people do, the virtualisers do (because a virtualised tty typically
operates at infinite speed rather than emulating 9600 baud).
Finally many drivers had invalid and unsafe attempts to avoid buffer
overflows by directly invoking tty methods extracted out of the innards
of work queue structs. These are no longer needed and all go away. That
fixes various random hangs with serial ports on overflow.
The other change in here is to optimise the receive_room path that is
used by some callers. It turns out that only one ldisc uses receive room
except asa constant and it updates it far far less than the value is
read. We thus make it a variable not a function call.
I expect the code to contain bugs due to the size alone but I'll be
watching and squashing them and feeding out new patches as it goes.
Because the buffers now dynamically expand you should only run out of
buffering when the kernel runs out of memory for real. That means a lot of
the horrible hacks high performance drivers used to do just aren't needed any
more.
Description:
tty_insert_flip_char is an old API and continues to work as before, as does
tty_flip_buffer_push() [this is why many drivers dont need modification]. It
does now also return the number of chars inserted
There are also
tty_buffer_request_room(tty, len)
which asks for a buffer block of the length requested and returns the space
found. This improves efficiency with hardware that knows how much to
transfer.
and tty_insert_flip_string_flags(tty, str, flags, len)
to insert a string of characters and flags
For a smart interface the usual code is
len = tty_request_buffer_room(tty, amount_hardware_says);
tty_insert_flip_string(tty, buffer_from_card, len);
More description!
At the moment tty buffers are attached directly to the tty. This is causing a
lot of the problems related to tty layer locking, also problems at high speed
and also with bursty data (such as occurs in virtualised environments)
I'm working on ripping out the flip buffers and replacing them with a pool of
dynamically allocated buffers. This allows both for old style "byte I/O"
devices and also helps virtualisation and smart devices where large blocks of
data suddenely materialise and need storing.
So far so good. Lots of drivers reference tty->flip.*. Several of them also
call directly and unsafely into function pointers it provides. This will all
break. Most drivers can use tty_insert_flip_char which can be kept as an API
but others need more.
At the moment I've added the following interfaces, if people think more will
be needed now is a good time to say
int tty_buffer_request_room(tty, size)
Try and ensure at least size bytes are available, returns actual room (may be
zero). At the moment it just uses the flipbuf space but that will change.
Repeated calls without characters being added are not cumulative. (ie if you
call it with 1, 1, 1, and then 4 you'll have four characters of space. The
other functions will also try and grow buffers in future but this will be a
more efficient way when you know block sizes.
int tty_insert_flip_char(tty, ch, flag)
As before insert a character if there is room. Now returns 1 for success, 0
for failure.
int tty_insert_flip_string(tty, str, len)
Insert a block of non error characters. Returns the number inserted.
int tty_prepare_flip_string(tty, strptr, len)
Adjust the buffer to allow len characters to be added. Returns a buffer
pointer in strptr and the length available. This allows for hardware that
needs to use functions like insl or mencpy_fromio.
Signed-off-by: Alan Cox <alan@redhat.com>
Cc: Paul Fulghum <paulkf@microgate.com>
Signed-off-by: Hirokazu Takata <takata@linux-m32r.org>
Signed-off-by: Serge Hallyn <serue@us.ibm.com>
Signed-off-by: Jeff Dike <jdike@addtoit.com>
Signed-off-by: John Hawkes <hawkes@sgi.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10 04:54:13 +00:00
|
|
|
}else {
|
|
|
|
|
tty_insert_flip_char(tty, 0, TTY_NORMAL);
|
|
|
|
|
info->icount.rx++;
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
|
}else{
|
[PATCH] TTY layer buffering revamp
The API and code have been through various bits of initial review by
serial driver people but they definitely need to live somewhere for a
while so the unconverted drivers can get knocked into shape, existing
drivers that have been updated can be better tuned and bugs whacked out.
This replaces the tty flip buffers with kmalloc objects in rings. In the
normal situation for an IRQ driven serial port at typical speeds the
behaviour is pretty much the same, two buffers end up allocated and the
kernel cycles between them as before.
When there are delays or at high speed we now behave far better as the
buffer pool can grow a bit rather than lose characters. This also means
that we can operate at higher speeds reliably.
For drivers that receive characters in blocks (DMA based, USB and
especially virtualisation) the layer allows a lot of driver specific
code that works around the tty layer with private secondary queues to be
removed. The IBM folks need this sort of layer, the smart serial port
people do, the virtualisers do (because a virtualised tty typically
operates at infinite speed rather than emulating 9600 baud).
Finally many drivers had invalid and unsafe attempts to avoid buffer
overflows by directly invoking tty methods extracted out of the innards
of work queue structs. These are no longer needed and all go away. That
fixes various random hangs with serial ports on overflow.
The other change in here is to optimise the receive_room path that is
used by some callers. It turns out that only one ldisc uses receive room
except asa constant and it updates it far far less than the value is
read. We thus make it a variable not a function call.
I expect the code to contain bugs due to the size alone but I'll be
watching and squashing them and feeding out new patches as it goes.
Because the buffers now dynamically expand you should only run out of
buffering when the kernel runs out of memory for real. That means a lot of
the horrible hacks high performance drivers used to do just aren't needed any
more.
Description:
tty_insert_flip_char is an old API and continues to work as before, as does
tty_flip_buffer_push() [this is why many drivers dont need modification]. It
does now also return the number of chars inserted
There are also
tty_buffer_request_room(tty, len)
which asks for a buffer block of the length requested and returns the space
found. This improves efficiency with hardware that knows how much to
transfer.
and tty_insert_flip_string_flags(tty, str, flags, len)
to insert a string of characters and flags
For a smart interface the usual code is
len = tty_request_buffer_room(tty, amount_hardware_says);
tty_insert_flip_string(tty, buffer_from_card, len);
More description!
At the moment tty buffers are attached directly to the tty. This is causing a
lot of the problems related to tty layer locking, also problems at high speed
and also with bursty data (such as occurs in virtualised environments)
I'm working on ripping out the flip buffers and replacing them with a pool of
dynamically allocated buffers. This allows both for old style "byte I/O"
devices and also helps virtualisation and smart devices where large blocks of
data suddenely materialise and need storing.
So far so good. Lots of drivers reference tty->flip.*. Several of them also
call directly and unsafely into function pointers it provides. This will all
break. Most drivers can use tty_insert_flip_char which can be kept as an API
but others need more.
At the moment I've added the following interfaces, if people think more will
be needed now is a good time to say
int tty_buffer_request_room(tty, size)
Try and ensure at least size bytes are available, returns actual room (may be
zero). At the moment it just uses the flipbuf space but that will change.
Repeated calls without characters being added are not cumulative. (ie if you
call it with 1, 1, 1, and then 4 you'll have four characters of space. The
other functions will also try and grow buffers in future but this will be a
more efficient way when you know block sizes.
int tty_insert_flip_char(tty, ch, flag)
As before insert a character if there is room. Now returns 1 for success, 0
for failure.
int tty_insert_flip_string(tty, str, len)
Insert a block of non error characters. Returns the number inserted.
int tty_prepare_flip_string(tty, strptr, len)
Adjust the buffer to allow len characters to be added. Returns a buffer
pointer in strptr and the length available. This allows for hardware that
needs to use functions like insl or mencpy_fromio.
Signed-off-by: Alan Cox <alan@redhat.com>
Cc: Paul Fulghum <paulkf@microgate.com>
Signed-off-by: Hirokazu Takata <takata@linux-m32r.org>
Signed-off-by: Serge Hallyn <serue@us.ibm.com>
Signed-off-by: Jeff Dike <jdike@addtoit.com>
Signed-off-by: John Hawkes <hawkes@sgi.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10 04:54:13 +00:00
|
|
|
tty_insert_flip_char(tty, 0, TTY_NORMAL);
|
2005-04-16 22:20:36 +00:00
|
|
|
info->icount.rx++;
|
|
|
|
|
}
|
|
|
|
|
}else{
|
|
|
|
|
/* there was a software buffer
|
|
|
|
|
overrun and nothing could be
|
|
|
|
|
done about it!!! */
|
|
|
|
|
info->icount.buf_overrun++;
|
|
|
|
|
info->idle_stats.overruns++;
|
|
|
|
|
}
|
|
|
|
|
} else { /* normal character reception */
|
|
|
|
|
/* load # chars available from the chip */
|
|
|
|
|
char_count = cy_readb(base_addr+(CyRDCR<<index));
|
|
|
|
|
|
|
|
|
|
#ifdef CY_ENABLE_MONITORING
|
|
|
|
|
++info->mon.int_count;
|
|
|
|
|
info->mon.char_count += char_count;
|
|
|
|
|
if (char_count > info->mon.char_max)
|
|
|
|
|
info->mon.char_max = char_count;
|
|
|
|
|
info->mon.char_last = char_count;
|
|
|
|
|
#endif
|
[PATCH] TTY layer buffering revamp
The API and code have been through various bits of initial review by
serial driver people but they definitely need to live somewhere for a
while so the unconverted drivers can get knocked into shape, existing
drivers that have been updated can be better tuned and bugs whacked out.
This replaces the tty flip buffers with kmalloc objects in rings. In the
normal situation for an IRQ driven serial port at typical speeds the
behaviour is pretty much the same, two buffers end up allocated and the
kernel cycles between them as before.
When there are delays or at high speed we now behave far better as the
buffer pool can grow a bit rather than lose characters. This also means
that we can operate at higher speeds reliably.
For drivers that receive characters in blocks (DMA based, USB and
especially virtualisation) the layer allows a lot of driver specific
code that works around the tty layer with private secondary queues to be
removed. The IBM folks need this sort of layer, the smart serial port
people do, the virtualisers do (because a virtualised tty typically
operates at infinite speed rather than emulating 9600 baud).
Finally many drivers had invalid and unsafe attempts to avoid buffer
overflows by directly invoking tty methods extracted out of the innards
of work queue structs. These are no longer needed and all go away. That
fixes various random hangs with serial ports on overflow.
The other change in here is to optimise the receive_room path that is
used by some callers. It turns out that only one ldisc uses receive room
except asa constant and it updates it far far less than the value is
read. We thus make it a variable not a function call.
I expect the code to contain bugs due to the size alone but I'll be
watching and squashing them and feeding out new patches as it goes.
Because the buffers now dynamically expand you should only run out of
buffering when the kernel runs out of memory for real. That means a lot of
the horrible hacks high performance drivers used to do just aren't needed any
more.
Description:
tty_insert_flip_char is an old API and continues to work as before, as does
tty_flip_buffer_push() [this is why many drivers dont need modification]. It
does now also return the number of chars inserted
There are also
tty_buffer_request_room(tty, len)
which asks for a buffer block of the length requested and returns the space
found. This improves efficiency with hardware that knows how much to
transfer.
and tty_insert_flip_string_flags(tty, str, flags, len)
to insert a string of characters and flags
For a smart interface the usual code is
len = tty_request_buffer_room(tty, amount_hardware_says);
tty_insert_flip_string(tty, buffer_from_card, len);
More description!
At the moment tty buffers are attached directly to the tty. This is causing a
lot of the problems related to tty layer locking, also problems at high speed
and also with bursty data (such as occurs in virtualised environments)
I'm working on ripping out the flip buffers and replacing them with a pool of
dynamically allocated buffers. This allows both for old style "byte I/O"
devices and also helps virtualisation and smart devices where large blocks of
data suddenely materialise and need storing.
So far so good. Lots of drivers reference tty->flip.*. Several of them also
call directly and unsafely into function pointers it provides. This will all
break. Most drivers can use tty_insert_flip_char which can be kept as an API
but others need more.
At the moment I've added the following interfaces, if people think more will
be needed now is a good time to say
int tty_buffer_request_room(tty, size)
Try and ensure at least size bytes are available, returns actual room (may be
zero). At the moment it just uses the flipbuf space but that will change.
Repeated calls without characters being added are not cumulative. (ie if you
call it with 1, 1, 1, and then 4 you'll have four characters of space. The
other functions will also try and grow buffers in future but this will be a
more efficient way when you know block sizes.
int tty_insert_flip_char(tty, ch, flag)
As before insert a character if there is room. Now returns 1 for success, 0
for failure.
int tty_insert_flip_string(tty, str, len)
Insert a block of non error characters. Returns the number inserted.
int tty_prepare_flip_string(tty, strptr, len)
Adjust the buffer to allow len characters to be added. Returns a buffer
pointer in strptr and the length available. This allows for hardware that
needs to use functions like insl or mencpy_fromio.
Signed-off-by: Alan Cox <alan@redhat.com>
Cc: Paul Fulghum <paulkf@microgate.com>
Signed-off-by: Hirokazu Takata <takata@linux-m32r.org>
Signed-off-by: Serge Hallyn <serue@us.ibm.com>
Signed-off-by: Jeff Dike <jdike@addtoit.com>
Signed-off-by: John Hawkes <hawkes@sgi.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10 04:54:13 +00:00
|
|
|
len = tty_buffer_request_room(tty, char_count);
|
|
|
|
|
while(len--){
|
2005-04-16 22:20:36 +00:00
|
|
|
data = cy_readb(base_addr+(CyRDSR<<index));
|
[PATCH] TTY layer buffering revamp
The API and code have been through various bits of initial review by
serial driver people but they definitely need to live somewhere for a
while so the unconverted drivers can get knocked into shape, existing
drivers that have been updated can be better tuned and bugs whacked out.
This replaces the tty flip buffers with kmalloc objects in rings. In the
normal situation for an IRQ driven serial port at typical speeds the
behaviour is pretty much the same, two buffers end up allocated and the
kernel cycles between them as before.
When there are delays or at high speed we now behave far better as the
buffer pool can grow a bit rather than lose characters. This also means
that we can operate at higher speeds reliably.
For drivers that receive characters in blocks (DMA based, USB and
especially virtualisation) the layer allows a lot of driver specific
code that works around the tty layer with private secondary queues to be
removed. The IBM folks need this sort of layer, the smart serial port
people do, the virtualisers do (because a virtualised tty typically
operates at infinite speed rather than emulating 9600 baud).
Finally many drivers had invalid and unsafe attempts to avoid buffer
overflows by directly invoking tty methods extracted out of the innards
of work queue structs. These are no longer needed and all go away. That
fixes various random hangs with serial ports on overflow.
The other change in here is to optimise the receive_room path that is
used by some callers. It turns out that only one ldisc uses receive room
except asa constant and it updates it far far less than the value is
read. We thus make it a variable not a function call.
I expect the code to contain bugs due to the size alone but I'll be
watching and squashing them and feeding out new patches as it goes.
Because the buffers now dynamically expand you should only run out of
buffering when the kernel runs out of memory for real. That means a lot of
the horrible hacks high performance drivers used to do just aren't needed any
more.
Description:
tty_insert_flip_char is an old API and continues to work as before, as does
tty_flip_buffer_push() [this is why many drivers dont need modification]. It
does now also return the number of chars inserted
There are also
tty_buffer_request_room(tty, len)
which asks for a buffer block of the length requested and returns the space
found. This improves efficiency with hardware that knows how much to
transfer.
and tty_insert_flip_string_flags(tty, str, flags, len)
to insert a string of characters and flags
For a smart interface the usual code is
len = tty_request_buffer_room(tty, amount_hardware_says);
tty_insert_flip_string(tty, buffer_from_card, len);
More description!
At the moment tty buffers are attached directly to the tty. This is causing a
lot of the problems related to tty layer locking, also problems at high speed
and also with bursty data (such as occurs in virtualised environments)
I'm working on ripping out the flip buffers and replacing them with a pool of
dynamically allocated buffers. This allows both for old style "byte I/O"
devices and also helps virtualisation and smart devices where large blocks of
data suddenely materialise and need storing.
So far so good. Lots of drivers reference tty->flip.*. Several of them also
call directly and unsafely into function pointers it provides. This will all
break. Most drivers can use tty_insert_flip_char which can be kept as an API
but others need more.
At the moment I've added the following interfaces, if people think more will
be needed now is a good time to say
int tty_buffer_request_room(tty, size)
Try and ensure at least size bytes are available, returns actual room (may be
zero). At the moment it just uses the flipbuf space but that will change.
Repeated calls without characters being added are not cumulative. (ie if you
call it with 1, 1, 1, and then 4 you'll have four characters of space. The
other functions will also try and grow buffers in future but this will be a
more efficient way when you know block sizes.
int tty_insert_flip_char(tty, ch, flag)
As before insert a character if there is room. Now returns 1 for success, 0
for failure.
int tty_insert_flip_string(tty, str, len)
Insert a block of non error characters. Returns the number inserted.
int tty_prepare_flip_string(tty, strptr, len)
Adjust the buffer to allow len characters to be added. Returns a buffer
pointer in strptr and the length available. This allows for hardware that
needs to use functions like insl or mencpy_fromio.
Signed-off-by: Alan Cox <alan@redhat.com>
Cc: Paul Fulghum <paulkf@microgate.com>
Signed-off-by: Hirokazu Takata <takata@linux-m32r.org>
Signed-off-by: Serge Hallyn <serue@us.ibm.com>
Signed-off-by: Jeff Dike <jdike@addtoit.com>
Signed-off-by: John Hawkes <hawkes@sgi.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10 04:54:13 +00:00
|
|
|
tty_insert_flip_char(tty, data, TTY_NORMAL);
|
2005-04-16 22:20:36 +00:00
|
|
|
info->idle_stats.recv_bytes++;
|
|
|
|
|
info->icount.rx++;
|
|
|
|
|
#ifdef CY_16Y_HACK
|
|
|
|
|
udelay(10L);
|
|
|
|
|
#endif
|
|
|
|
|
}
|
|
|
|
|
info->idle_stats.recv_idle = jiffies;
|
|
|
|
|
}
|
2006-02-03 11:04:41 +00:00
|
|
|
tty_schedule_flip(tty);
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
|
/* end of service */
|
|
|
|
|
cy_writeb(base_addr+(CyRIR<<index), (save_xir & 0x3f));
|
|
|
|
|
cy_writeb(base_addr+(CyCAR<<index), (save_car));
|
|
|
|
|
spin_unlock(&cinfo->card_lock);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
if (status & CySRTransmit) { /* transmission interrupt */
|
|
|
|
|
/* Since we only get here when the transmit buffer
|
|
|
|
|
is empty, we know we can always stuff a dozen
|
|
|
|
|
characters. */
|
|
|
|
|
#ifdef CY_DEBUG_INTERRUPTS
|
|
|
|
|
printk("cyy_interrupt: xmit intr, chip %d\n\r", chip);
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
/* determine the channel & change to that context */
|
|
|
|
|
spin_lock(&cinfo->card_lock);
|
|
|
|
|
save_xir = (u_char) cy_readb(base_addr+(CyTIR<<index));
|
|
|
|
|
channel = (u_short ) (save_xir & CyIRChannel);
|
|
|
|
|
i = channel + chip * 4 + cinfo->first_line;
|
|
|
|
|
save_car = cy_readb(base_addr+(CyCAR<<index));
|
|
|
|
|
cy_writeb(base_addr+(CyCAR<<index), save_xir);
|
|
|
|
|
|
|
|
|
|
/* validate the port# (as configured and open) */
|
|
|
|
|
if( (i < 0) || (NR_PORTS <= i) ){
|
|
|
|
|
cy_writeb(base_addr+(CySRER<<index),
|
|
|
|
|
cy_readb(base_addr+(CySRER<<index)) & ~CyTxRdy);
|
|
|
|
|
goto txend;
|
|
|
|
|
}
|
|
|
|
|
info = &cy_port[i];
|
|
|
|
|
info->last_active = jiffies;
|
|
|
|
|
if(info->tty == 0){
|
|
|
|
|
cy_writeb(base_addr+(CySRER<<index),
|
|
|
|
|
cy_readb(base_addr+(CySRER<<index)) & ~CyTxRdy);
|
|
|
|
|
goto txdone;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* load the on-chip space for outbound data */
|
|
|
|
|
char_count = info->xmit_fifo_size;
|
|
|
|
|
|
|
|
|
|
if(info->x_char) { /* send special char */
|
|
|
|
|
outch = info->x_char;
|
|
|
|
|
cy_writeb(base_addr+(CyTDR<<index), outch);
|
|
|
|
|
char_count--;
|
|
|
|
|
info->icount.tx++;
|
|
|
|
|
info->x_char = 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (info->breakon || info->breakoff) {
|
|
|
|
|
if (info->breakon) {
|
|
|
|
|
cy_writeb(base_addr + (CyTDR<<index), 0);
|
|
|
|
|
cy_writeb(base_addr + (CyTDR<<index), 0x81);
|
|
|
|
|
info->breakon = 0;
|
|
|
|
|
char_count -= 2;
|
|
|
|
|
}
|
|
|
|
|
if (info->breakoff) {
|
|
|
|
|
cy_writeb(base_addr + (CyTDR<<index), 0);
|
|
|
|
|
cy_writeb(base_addr + (CyTDR<<index), 0x83);
|
|
|
|
|
info->breakoff = 0;
|
|
|
|
|
char_count -= 2;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
while (char_count-- > 0){
|
|
|
|
|
if (!info->xmit_cnt){
|
|
|
|
|
if (cy_readb(base_addr+(CySRER<<index))&CyTxMpty) {
|
|
|
|
|
cy_writeb(base_addr+(CySRER<<index),
|
|
|
|
|
cy_readb(base_addr+(CySRER<<index)) &
|
|
|
|
|
~CyTxMpty);
|
|
|
|
|
} else {
|
|
|
|
|
cy_writeb(base_addr+(CySRER<<index),
|
|
|
|
|
((cy_readb(base_addr+(CySRER<<index))
|
|
|
|
|
& ~CyTxRdy)
|
|
|
|
|
| CyTxMpty));
|
|
|
|
|
}
|
|
|
|
|
goto txdone;
|
|
|
|
|
}
|
|
|
|
|
if (info->xmit_buf == 0){
|
|
|
|
|
cy_writeb(base_addr+(CySRER<<index),
|
|
|
|
|
cy_readb(base_addr+(CySRER<<index)) &
|
|
|
|
|
~CyTxRdy);
|
|
|
|
|
goto txdone;
|
|
|
|
|
}
|
|
|
|
|
if (info->tty->stopped || info->tty->hw_stopped){
|
|
|
|
|
cy_writeb(base_addr+(CySRER<<index),
|
|
|
|
|
cy_readb(base_addr+(CySRER<<index)) &
|
|
|
|
|
~CyTxRdy);
|
|
|
|
|
goto txdone;
|
|
|
|
|
}
|
|
|
|
|
/* Because the Embedded Transmit Commands have
|
|
|
|
|
been enabled, we must check to see if the
|
|
|
|
|
escape character, NULL, is being sent. If it
|
|
|
|
|
is, we must ensure that there is room for it
|
|
|
|
|
to be doubled in the output stream. Therefore
|
|
|
|
|
we no longer advance the pointer when the
|
|
|
|
|
character is fetched, but rather wait until
|
|
|
|
|
after the check for a NULL output character.
|
|
|
|
|
This is necessary because there may not be
|
|
|
|
|
room for the two chars needed to send a NULL.)
|
|
|
|
|
*/
|
|
|
|
|
outch = info->xmit_buf[info->xmit_tail];
|
|
|
|
|
if( outch ){
|
|
|
|
|
info->xmit_cnt--;
|
|
|
|
|
info->xmit_tail = (info->xmit_tail + 1)
|
|
|
|
|
& (SERIAL_XMIT_SIZE - 1);
|
|
|
|
|
cy_writeb(base_addr+(CyTDR<<index), outch);
|
|
|
|
|
info->icount.tx++;
|
|
|
|
|
}else{
|
|
|
|
|
if(char_count > 1){
|
|
|
|
|
info->xmit_cnt--;
|
|
|
|
|
info->xmit_tail = (info->xmit_tail + 1)
|
|
|
|
|
& (SERIAL_XMIT_SIZE - 1);
|
|
|
|
|
cy_writeb(base_addr+(CyTDR<<index),
|
|
|
|
|
outch);
|
|
|
|
|
cy_writeb(base_addr+(CyTDR<<index), 0);
|
|
|
|
|
info->icount.tx++;
|
|
|
|
|
char_count--;
|
|
|
|
|
}else{
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
txdone:
|
|
|
|
|
if (info->xmit_cnt < WAKEUP_CHARS) {
|
|
|
|
|
cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP);
|
|
|
|
|
}
|
|
|
|
|
txend:
|
|
|
|
|
/* end of service */
|
|
|
|
|
cy_writeb(base_addr+(CyTIR<<index),
|
|
|
|
|
(save_xir & 0x3f));
|
|
|
|
|
cy_writeb(base_addr+(CyCAR<<index), (save_car));
|
|
|
|
|
spin_unlock(&cinfo->card_lock);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (status & CySRModem) { /* modem interrupt */
|
|
|
|
|
|
|
|
|
|
/* determine the channel & change to that context */
|
|
|
|
|
spin_lock(&cinfo->card_lock);
|
|
|
|
|
save_xir = (u_char) cy_readb(base_addr+(CyMIR<<index));
|
|
|
|
|
channel = (u_short ) (save_xir & CyIRChannel);
|
|
|
|
|
info = &cy_port[channel + chip * 4
|
|
|
|
|
+ cinfo->first_line];
|
|
|
|
|
info->last_active = jiffies;
|
|
|
|
|
save_car = cy_readb(base_addr+(CyCAR<<index));
|
|
|
|
|
cy_writeb(base_addr+(CyCAR<<index), save_xir);
|
|
|
|
|
|
|
|
|
|
mdm_change = cy_readb(base_addr+(CyMISR<<index));
|
|
|
|
|
mdm_status = cy_readb(base_addr+(CyMSVR1<<index));
|
|
|
|
|
|
|
|
|
|
if(info->tty == 0){/* no place for data, ignore it*/
|
|
|
|
|
;
|
|
|
|
|
}else{
|
|
|
|
|
if (mdm_change & CyANY_DELTA) {
|
|
|
|
|
/* For statistics only */
|
|
|
|
|
if (mdm_change & CyDCD) info->icount.dcd++;
|
|
|
|
|
if (mdm_change & CyCTS) info->icount.cts++;
|
|
|
|
|
if (mdm_change & CyDSR) info->icount.dsr++;
|
|
|
|
|
if (mdm_change & CyRI) info->icount.rng++;
|
|
|
|
|
|
|
|
|
|
cy_sched_event(info, Cy_EVENT_DELTA_WAKEUP);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if((mdm_change & CyDCD)
|
|
|
|
|
&& (info->flags & ASYNC_CHECK_CD)){
|
|
|
|
|
if(mdm_status & CyDCD){
|
|
|
|
|
cy_sched_event(info,
|
|
|
|
|
Cy_EVENT_OPEN_WAKEUP);
|
|
|
|
|
}else{
|
|
|
|
|
cy_sched_event(info,
|
|
|
|
|
Cy_EVENT_HANGUP);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
if((mdm_change & CyCTS)
|
|
|
|
|
&& (info->flags & ASYNC_CTS_FLOW)){
|
|
|
|
|
if(info->tty->hw_stopped){
|
|
|
|
|
if(mdm_status & CyCTS){
|
|
|
|
|
/* cy_start isn't used
|
|
|
|
|
because... !!! */
|
|
|
|
|
info->tty->hw_stopped = 0;
|
|
|
|
|
cy_writeb(base_addr+(CySRER<<index),
|
|
|
|
|
cy_readb(base_addr+(CySRER<<index)) |
|
|
|
|
|
CyTxRdy);
|
|
|
|
|
cy_sched_event(info,
|
|
|
|
|
Cy_EVENT_WRITE_WAKEUP);
|
|
|
|
|
}
|
|
|
|
|
}else{
|
|
|
|
|
if(!(mdm_status & CyCTS)){
|
|
|
|
|
/* cy_stop isn't used
|
|
|
|
|
because ... !!! */
|
|
|
|
|
info->tty->hw_stopped = 1;
|
|
|
|
|
cy_writeb(base_addr+(CySRER<<index),
|
|
|
|
|
cy_readb(base_addr+(CySRER<<index)) &
|
|
|
|
|
~CyTxRdy);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
if(mdm_change & CyDSR){
|
|
|
|
|
}
|
|
|
|
|
if(mdm_change & CyRI){
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
/* end of service */
|
|
|
|
|
cy_writeb(base_addr+(CyMIR<<index),
|
|
|
|
|
(save_xir & 0x3f));
|
|
|
|
|
cy_writeb(base_addr+(CyCAR<<index), save_car);
|
|
|
|
|
spin_unlock(&cinfo->card_lock);
|
|
|
|
|
}
|
|
|
|
|
} /* end while status != 0 */
|
|
|
|
|
} /* end loop for chips... */
|
|
|
|
|
} while(had_work);
|
|
|
|
|
|
|
|
|
|
/* clear interrupts */
|
|
|
|
|
spin_lock(&cinfo->card_lock);
|
|
|
|
|
cy_writeb(card_base_addr + (Cy_ClrIntr<<index), 0);
|
|
|
|
|
/* Cy_ClrIntr is 0x1800 */
|
|
|
|
|
spin_unlock(&cinfo->card_lock);
|
|
|
|
|
return IRQ_HANDLED;
|
|
|
|
|
} /* cyy_interrupt */
|
|
|
|
|
|
|
|
|
|
/***********************************************************/
|
|
|
|
|
/********* End of block of Cyclom-Y specific code **********/
|
|
|
|
|
/******** Start of block of Cyclades-Z specific code *********/
|
|
|
|
|
/***********************************************************/
|
|
|
|
|
|
|
|
|
|
static int
|
|
|
|
|
cyz_fetch_msg( struct cyclades_card *cinfo,
|
|
|
|
|
uclong *channel, ucchar *cmd, uclong *param)
|
|
|
|
|
{
|
|
|
|
|
struct FIRM_ID __iomem *firm_id;
|
|
|
|
|
struct ZFW_CTRL __iomem *zfw_ctrl;
|
|
|
|
|
struct BOARD_CTRL __iomem *board_ctrl;
|
|
|
|
|
unsigned long loc_doorbell;
|
|
|
|
|
|
|
|
|
|
firm_id = cinfo->base_addr + ID_ADDRESS;
|
|
|
|
|
if (!ISZLOADED(*cinfo)){
|
|
|
|
|
return (-1);
|
|
|
|
|
}
|
|
|
|
|
zfw_ctrl = cinfo->base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
|
|
|
|
|
board_ctrl = &zfw_ctrl->board_ctrl;
|
|
|
|
|
|
|
|
|
|
loc_doorbell = cy_readl(&((struct RUNTIME_9060 __iomem *)
|
|
|
|
|
(cinfo->ctl_addr))->loc_doorbell);
|
|
|
|
|
if (loc_doorbell){
|
|
|
|
|
*cmd = (char)(0xff & loc_doorbell);
|
|
|
|
|
*channel = cy_readl(&board_ctrl->fwcmd_channel);
|
|
|
|
|
*param = (uclong)cy_readl(&board_ctrl->fwcmd_param);
|
|
|
|
|
cy_writel(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->loc_doorbell,
|
|
|
|
|
0xffffffff);
|
|
|
|
|
return 1;
|
|
|
|
|
}
|
|
|
|
|
return 0;
|
|
|
|
|
} /* cyz_fetch_msg */
|
|
|
|
|
|
|
|
|
|
static int
|
|
|
|
|
cyz_issue_cmd( struct cyclades_card *cinfo,
|
|
|
|
|
uclong channel, ucchar cmd, uclong param)
|
|
|
|
|
{
|
|
|
|
|
struct FIRM_ID __iomem *firm_id;
|
|
|
|
|
struct ZFW_CTRL __iomem *zfw_ctrl;
|
|
|
|
|
struct BOARD_CTRL __iomem *board_ctrl;
|
|
|
|
|
unsigned long __iomem *pci_doorbell;
|
|
|
|
|
int index;
|
|
|
|
|
|
|
|
|
|
firm_id = cinfo->base_addr + ID_ADDRESS;
|
|
|
|
|
if (!ISZLOADED(*cinfo)){
|
|
|
|
|
return (-1);
|
|
|
|
|
}
|
|
|
|
|
zfw_ctrl = cinfo->base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
|
|
|
|
|
board_ctrl = &zfw_ctrl->board_ctrl;
|
|
|
|
|
|
|
|
|
|
index = 0;
|
|
|
|
|
pci_doorbell = &((struct RUNTIME_9060 __iomem *) (cinfo->ctl_addr))->pci_doorbell;
|
|
|
|
|
while( (cy_readl(pci_doorbell) & 0xff) != 0){
|
|
|
|
|
if (index++ == 1000){
|
|
|
|
|
return((int)(cy_readl(pci_doorbell) & 0xff));
|
|
|
|
|
}
|
|
|
|
|
udelay(50L);
|
|
|
|
|
}
|
|
|
|
|
cy_writel(&board_ctrl->hcmd_channel, channel);
|
|
|
|
|
cy_writel(&board_ctrl->hcmd_param , param);
|
|
|
|
|
cy_writel(pci_doorbell, (long)cmd);
|
|
|
|
|
|
|
|
|
|
return(0);
|
|
|
|
|
} /* cyz_issue_cmd */
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
|
cyz_handle_rx(struct cyclades_port *info,
|
|
|
|
|
volatile struct CH_CTRL __iomem *ch_ctrl,
|
|
|
|
|
volatile struct BUF_CTRL __iomem *buf_ctrl)
|
|
|
|
|
{
|
|
|
|
|
struct cyclades_card *cinfo = &cy_card[info->card];
|
|
|
|
|
struct tty_struct *tty = info->tty;
|
|
|
|
|
volatile int char_count;
|
[PATCH] TTY layer buffering revamp
The API and code have been through various bits of initial review by
serial driver people but they definitely need to live somewhere for a
while so the unconverted drivers can get knocked into shape, existing
drivers that have been updated can be better tuned and bugs whacked out.
This replaces the tty flip buffers with kmalloc objects in rings. In the
normal situation for an IRQ driven serial port at typical speeds the
behaviour is pretty much the same, two buffers end up allocated and the
kernel cycles between them as before.
When there are delays or at high speed we now behave far better as the
buffer pool can grow a bit rather than lose characters. This also means
that we can operate at higher speeds reliably.
For drivers that receive characters in blocks (DMA based, USB and
especially virtualisation) the layer allows a lot of driver specific
code that works around the tty layer with private secondary queues to be
removed. The IBM folks need this sort of layer, the smart serial port
people do, the virtualisers do (because a virtualised tty typically
operates at infinite speed rather than emulating 9600 baud).
Finally many drivers had invalid and unsafe attempts to avoid buffer
overflows by directly invoking tty methods extracted out of the innards
of work queue structs. These are no longer needed and all go away. That
fixes various random hangs with serial ports on overflow.
The other change in here is to optimise the receive_room path that is
used by some callers. It turns out that only one ldisc uses receive room
except asa constant and it updates it far far less than the value is
read. We thus make it a variable not a function call.
I expect the code to contain bugs due to the size alone but I'll be
watching and squashing them and feeding out new patches as it goes.
Because the buffers now dynamically expand you should only run out of
buffering when the kernel runs out of memory for real. That means a lot of
the horrible hacks high performance drivers used to do just aren't needed any
more.
Description:
tty_insert_flip_char is an old API and continues to work as before, as does
tty_flip_buffer_push() [this is why many drivers dont need modification]. It
does now also return the number of chars inserted
There are also
tty_buffer_request_room(tty, len)
which asks for a buffer block of the length requested and returns the space
found. This improves efficiency with hardware that knows how much to
transfer.
and tty_insert_flip_string_flags(tty, str, flags, len)
to insert a string of characters and flags
For a smart interface the usual code is
len = tty_request_buffer_room(tty, amount_hardware_says);
tty_insert_flip_string(tty, buffer_from_card, len);
More description!
At the moment tty buffers are attached directly to the tty. This is causing a
lot of the problems related to tty layer locking, also problems at high speed
and also with bursty data (such as occurs in virtualised environments)
I'm working on ripping out the flip buffers and replacing them with a pool of
dynamically allocated buffers. This allows both for old style "byte I/O"
devices and also helps virtualisation and smart devices where large blocks of
data suddenely materialise and need storing.
So far so good. Lots of drivers reference tty->flip.*. Several of them also
call directly and unsafely into function pointers it provides. This will all
break. Most drivers can use tty_insert_flip_char which can be kept as an API
but others need more.
At the moment I've added the following interfaces, if people think more will
be needed now is a good time to say
int tty_buffer_request_room(tty, size)
Try and ensure at least size bytes are available, returns actual room (may be
zero). At the moment it just uses the flipbuf space but that will change.
Repeated calls without characters being added are not cumulative. (ie if you
call it with 1, 1, 1, and then 4 you'll have four characters of space. The
other functions will also try and grow buffers in future but this will be a
more efficient way when you know block sizes.
int tty_insert_flip_char(tty, ch, flag)
As before insert a character if there is room. Now returns 1 for success, 0
for failure.
int tty_insert_flip_string(tty, str, len)
Insert a block of non error characters. Returns the number inserted.
int tty_prepare_flip_string(tty, strptr, len)
Adjust the buffer to allow len characters to be added. Returns a buffer
pointer in strptr and the length available. This allows for hardware that
needs to use functions like insl or mencpy_fromio.
Signed-off-by: Alan Cox <alan@redhat.com>
Cc: Paul Fulghum <paulkf@microgate.com>
Signed-off-by: Hirokazu Takata <takata@linux-m32r.org>
Signed-off-by: Serge Hallyn <serue@us.ibm.com>
Signed-off-by: Jeff Dike <jdike@addtoit.com>
Signed-off-by: John Hawkes <hawkes@sgi.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10 04:54:13 +00:00
|
|
|
int len;
|
2005-04-16 22:20:36 +00:00
|
|
|
#ifdef BLOCKMOVE
|
|
|
|
|
int small_count;
|
|
|
|
|
#else
|
|
|
|
|
char data;
|
|
|
|
|
#endif
|
|
|
|
|
volatile uclong rx_put, rx_get, new_rx_get, rx_bufsize, rx_bufaddr;
|
|
|
|
|
|
|
|
|
|
rx_get = new_rx_get = cy_readl(&buf_ctrl->rx_get);
|
|
|
|
|
rx_put = cy_readl(&buf_ctrl->rx_put);
|
|
|
|
|
rx_bufsize = cy_readl(&buf_ctrl->rx_bufsize);
|
|
|
|
|
rx_bufaddr = cy_readl(&buf_ctrl->rx_bufaddr);
|
|
|
|
|
if (rx_put >= rx_get)
|
|
|
|
|
char_count = rx_put - rx_get;
|
|
|
|
|
else
|
|
|
|
|
char_count = rx_put - rx_get + rx_bufsize;
|
|
|
|
|
|
|
|
|
|
if ( char_count ) {
|
|
|
|
|
info->last_active = jiffies;
|
|
|
|
|
info->jiffies[1] = jiffies;
|
|
|
|
|
|
|
|
|
|
#ifdef CY_ENABLE_MONITORING
|
|
|
|
|
info->mon.int_count++;
|
|
|
|
|
info->mon.char_count += char_count;
|
|
|
|
|
if (char_count > info->mon.char_max)
|
|
|
|
|
info->mon.char_max = char_count;
|
|
|
|
|
info->mon.char_last = char_count;
|
|
|
|
|
#endif
|
|
|
|
|
if(tty == 0){
|
|
|
|
|
/* flush received characters */
|
|
|
|
|
new_rx_get = (new_rx_get + char_count) & (rx_bufsize - 1);
|
|
|
|
|
info->rflush_count++;
|
|
|
|
|
}else{
|
|
|
|
|
#ifdef BLOCKMOVE
|
|
|
|
|
/* we'd like to use memcpy(t, f, n) and memset(s, c, count)
|
|
|
|
|
for performance, but because of buffer boundaries, there
|
|
|
|
|
may be several steps to the operation */
|
|
|
|
|
while(0 < (small_count =
|
|
|
|
|
min_t(unsigned int, (rx_bufsize - new_rx_get),
|
|
|
|
|
min_t(unsigned int, (TTY_FLIPBUF_SIZE - tty->flip.count), char_count))
|
|
|
|
|
)) {
|
|
|
|
|
memcpy_fromio(tty->flip.char_buf_ptr,
|
|
|
|
|
(char *)(cinfo->base_addr
|
|
|
|
|
+ rx_bufaddr + new_rx_get),
|
|
|
|
|
small_count);
|
|
|
|
|
|
|
|
|
|
tty->flip.char_buf_ptr += small_count;
|
|
|
|
|
memset(tty->flip.flag_buf_ptr, TTY_NORMAL, small_count);
|
|
|
|
|
tty->flip.flag_buf_ptr += small_count;
|
|
|
|
|
new_rx_get = (new_rx_get + small_count) & (rx_bufsize - 1);
|
|
|
|
|
char_count -= small_count;
|
|
|
|
|
info->icount.rx += small_count;
|
|
|
|
|
info->idle_stats.recv_bytes += small_count;
|
|
|
|
|
tty->flip.count += small_count;
|
|
|
|
|
}
|
|
|
|
|
#else
|
[PATCH] TTY layer buffering revamp
The API and code have been through various bits of initial review by
serial driver people but they definitely need to live somewhere for a
while so the unconverted drivers can get knocked into shape, existing
drivers that have been updated can be better tuned and bugs whacked out.
This replaces the tty flip buffers with kmalloc objects in rings. In the
normal situation for an IRQ driven serial port at typical speeds the
behaviour is pretty much the same, two buffers end up allocated and the
kernel cycles between them as before.
When there are delays or at high speed we now behave far better as the
buffer pool can grow a bit rather than lose characters. This also means
that we can operate at higher speeds reliably.
For drivers that receive characters in blocks (DMA based, USB and
especially virtualisation) the layer allows a lot of driver specific
code that works around the tty layer with private secondary queues to be
removed. The IBM folks need this sort of layer, the smart serial port
people do, the virtualisers do (because a virtualised tty typically
operates at infinite speed rather than emulating 9600 baud).
Finally many drivers had invalid and unsafe attempts to avoid buffer
overflows by directly invoking tty methods extracted out of the innards
of work queue structs. These are no longer needed and all go away. That
fixes various random hangs with serial ports on overflow.
The other change in here is to optimise the receive_room path that is
used by some callers. It turns out that only one ldisc uses receive room
except asa constant and it updates it far far less than the value is
read. We thus make it a variable not a function call.
I expect the code to contain bugs due to the size alone but I'll be
watching and squashing them and feeding out new patches as it goes.
Because the buffers now dynamically expand you should only run out of
buffering when the kernel runs out of memory for real. That means a lot of
the horrible hacks high performance drivers used to do just aren't needed any
more.
Description:
tty_insert_flip_char is an old API and continues to work as before, as does
tty_flip_buffer_push() [this is why many drivers dont need modification]. It
does now also return the number of chars inserted
There are also
tty_buffer_request_room(tty, len)
which asks for a buffer block of the length requested and returns the space
found. This improves efficiency with hardware that knows how much to
transfer.
and tty_insert_flip_string_flags(tty, str, flags, len)
to insert a string of characters and flags
For a smart interface the usual code is
len = tty_request_buffer_room(tty, amount_hardware_says);
tty_insert_flip_string(tty, buffer_from_card, len);
More description!
At the moment tty buffers are attached directly to the tty. This is causing a
lot of the problems related to tty layer locking, also problems at high speed
and also with bursty data (such as occurs in virtualised environments)
I'm working on ripping out the flip buffers and replacing them with a pool of
dynamically allocated buffers. This allows both for old style "byte I/O"
devices and also helps virtualisation and smart devices where large blocks of
data suddenely materialise and need storing.
So far so good. Lots of drivers reference tty->flip.*. Several of them also
call directly and unsafely into function pointers it provides. This will all
break. Most drivers can use tty_insert_flip_char which can be kept as an API
but others need more.
At the moment I've added the following interfaces, if people think more will
be needed now is a good time to say
int tty_buffer_request_room(tty, size)
Try and ensure at least size bytes are available, returns actual room (may be
zero). At the moment it just uses the flipbuf space but that will change.
Repeated calls without characters being added are not cumulative. (ie if you
call it with 1, 1, 1, and then 4 you'll have four characters of space. The
other functions will also try and grow buffers in future but this will be a
more efficient way when you know block sizes.
int tty_insert_flip_char(tty, ch, flag)
As before insert a character if there is room. Now returns 1 for success, 0
for failure.
int tty_insert_flip_string(tty, str, len)
Insert a block of non error characters. Returns the number inserted.
int tty_prepare_flip_string(tty, strptr, len)
Adjust the buffer to allow len characters to be added. Returns a buffer
pointer in strptr and the length available. This allows for hardware that
needs to use functions like insl or mencpy_fromio.
Signed-off-by: Alan Cox <alan@redhat.com>
Cc: Paul Fulghum <paulkf@microgate.com>
Signed-off-by: Hirokazu Takata <takata@linux-m32r.org>
Signed-off-by: Serge Hallyn <serue@us.ibm.com>
Signed-off-by: Jeff Dike <jdike@addtoit.com>
Signed-off-by: John Hawkes <hawkes@sgi.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10 04:54:13 +00:00
|
|
|
len = tty_buffer_request_room(tty, char_count);
|
|
|
|
|
while(len--){
|
2005-04-16 22:20:36 +00:00
|
|
|
data = cy_readb(cinfo->base_addr + rx_bufaddr + new_rx_get);
|
|
|
|
|
new_rx_get = (new_rx_get + 1) & (rx_bufsize - 1);
|
[PATCH] TTY layer buffering revamp
The API and code have been through various bits of initial review by
serial driver people but they definitely need to live somewhere for a
while so the unconverted drivers can get knocked into shape, existing
drivers that have been updated can be better tuned and bugs whacked out.
This replaces the tty flip buffers with kmalloc objects in rings. In the
normal situation for an IRQ driven serial port at typical speeds the
behaviour is pretty much the same, two buffers end up allocated and the
kernel cycles between them as before.
When there are delays or at high speed we now behave far better as the
buffer pool can grow a bit rather than lose characters. This also means
that we can operate at higher speeds reliably.
For drivers that receive characters in blocks (DMA based, USB and
especially virtualisation) the layer allows a lot of driver specific
code that works around the tty layer with private secondary queues to be
removed. The IBM folks need this sort of layer, the smart serial port
people do, the virtualisers do (because a virtualised tty typically
operates at infinite speed rather than emulating 9600 baud).
Finally many drivers had invalid and unsafe attempts to avoid buffer
overflows by directly invoking tty methods extracted out of the innards
of work queue structs. These are no longer needed and all go away. That
fixes various random hangs with serial ports on overflow.
The other change in here is to optimise the receive_room path that is
used by some callers. It turns out that only one ldisc uses receive room
except asa constant and it updates it far far less than the value is
read. We thus make it a variable not a function call.
I expect the code to contain bugs due to the size alone but I'll be
watching and squashing them and feeding out new patches as it goes.
Because the buffers now dynamically expand you should only run out of
buffering when the kernel runs out of memory for real. That means a lot of
the horrible hacks high performance drivers used to do just aren't needed any
more.
Description:
tty_insert_flip_char is an old API and continues to work as before, as does
tty_flip_buffer_push() [this is why many drivers dont need modification]. It
does now also return the number of chars inserted
There are also
tty_buffer_request_room(tty, len)
which asks for a buffer block of the length requested and returns the space
found. This improves efficiency with hardware that knows how much to
transfer.
and tty_insert_flip_string_flags(tty, str, flags, len)
to insert a string of characters and flags
For a smart interface the usual code is
len = tty_request_buffer_room(tty, amount_hardware_says);
tty_insert_flip_string(tty, buffer_from_card, len);
More description!
At the moment tty buffers are attached directly to the tty. This is causing a
lot of the problems related to tty layer locking, also problems at high speed
and also with bursty data (such as occurs in virtualised environments)
I'm working on ripping out the flip buffers and replacing them with a pool of
dynamically allocated buffers. This allows both for old style "byte I/O"
devices and also helps virtualisation and smart devices where large blocks of
data suddenely materialise and need storing.
So far so good. Lots of drivers reference tty->flip.*. Several of them also
call directly and unsafely into function pointers it provides. This will all
break. Most drivers can use tty_insert_flip_char which can be kept as an API
but others need more.
At the moment I've added the following interfaces, if people think more will
be needed now is a good time to say
int tty_buffer_request_room(tty, size)
Try and ensure at least size bytes are available, returns actual room (may be
zero). At the moment it just uses the flipbuf space but that will change.
Repeated calls without characters being added are not cumulative. (ie if you
call it with 1, 1, 1, and then 4 you'll have four characters of space. The
other functions will also try and grow buffers in future but this will be a
more efficient way when you know block sizes.
int tty_insert_flip_char(tty, ch, flag)
As before insert a character if there is room. Now returns 1 for success, 0
for failure.
int tty_insert_flip_string(tty, str, len)
Insert a block of non error characters. Returns the number inserted.
int tty_prepare_flip_string(tty, strptr, len)
Adjust the buffer to allow len characters to be added. Returns a buffer
pointer in strptr and the length available. This allows for hardware that
needs to use functions like insl or mencpy_fromio.
Signed-off-by: Alan Cox <alan@redhat.com>
Cc: Paul Fulghum <paulkf@microgate.com>
Signed-off-by: Hirokazu Takata <takata@linux-m32r.org>
Signed-off-by: Serge Hallyn <serue@us.ibm.com>
Signed-off-by: Jeff Dike <jdike@addtoit.com>
Signed-off-by: John Hawkes <hawkes@sgi.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10 04:54:13 +00:00
|
|
|
tty_insert_flip_char(tty, data, TTY_NORMAL);
|
2005-04-16 22:20:36 +00:00
|
|
|
info->idle_stats.recv_bytes++;
|
|
|
|
|
info->icount.rx++;
|
|
|
|
|
}
|
|
|
|
|
#endif
|
|
|
|
|
#ifdef CONFIG_CYZ_INTR
|
|
|
|
|
/* Recalculate the number of chars in the RX buffer and issue
|
|
|
|
|
a cmd in case it's higher than the RX high water mark */
|
|
|
|
|
rx_put = cy_readl(&buf_ctrl->rx_put);
|
|
|
|
|
if (rx_put >= rx_get)
|
|
|
|
|
char_count = rx_put - rx_get;
|
|
|
|
|
else
|
|
|
|
|
char_count = rx_put - rx_get + rx_bufsize;
|
|
|
|
|
if(char_count >= cy_readl(&buf_ctrl->rx_threshold)) {
|
|
|
|
|
cy_sched_event(info, Cy_EVENT_Z_RX_FULL);
|
|
|
|
|
}
|
|
|
|
|
#endif
|
|
|
|
|
info->idle_stats.recv_idle = jiffies;
|
2006-02-03 11:04:41 +00:00
|
|
|
tty_schedule_flip(tty);
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
|
/* Update rx_get */
|
|
|
|
|
cy_writel(&buf_ctrl->rx_get, new_rx_get);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
|
cyz_handle_tx(struct cyclades_port *info,
|
|
|
|
|
volatile struct CH_CTRL __iomem *ch_ctrl,
|
|
|
|
|
volatile struct BUF_CTRL __iomem *buf_ctrl)
|
|
|
|
|
{
|
|
|
|
|
struct cyclades_card *cinfo = &cy_card[info->card];
|
|
|
|
|
struct tty_struct *tty = info->tty;
|
|
|
|
|
char data;
|
|
|
|
|
volatile int char_count;
|
|
|
|
|
#ifdef BLOCKMOVE
|
|
|
|
|
int small_count;
|
|
|
|
|
#endif
|
|
|
|
|
volatile uclong tx_put, tx_get, tx_bufsize, tx_bufaddr;
|
|
|
|
|
|
|
|
|
|
if (info->xmit_cnt <= 0) /* Nothing to transmit */
|
|
|
|
|
return;
|
|
|
|
|
|
|
|
|
|
tx_get = cy_readl(&buf_ctrl->tx_get);
|
|
|
|
|
tx_put = cy_readl(&buf_ctrl->tx_put);
|
|
|
|
|
tx_bufsize = cy_readl(&buf_ctrl->tx_bufsize);
|
|
|
|
|
tx_bufaddr = cy_readl(&buf_ctrl->tx_bufaddr);
|
|
|
|
|
if (tx_put >= tx_get)
|
|
|
|
|
char_count = tx_get - tx_put - 1 + tx_bufsize;
|
|
|
|
|
else
|
|
|
|
|
char_count = tx_get - tx_put - 1;
|
|
|
|
|
|
|
|
|
|
if ( char_count ) {
|
|
|
|
|
|
|
|
|
|
if( tty == 0 ){
|
|
|
|
|
goto ztxdone;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if(info->x_char) { /* send special char */
|
|
|
|
|
data = info->x_char;
|
|
|
|
|
|
|
|
|
|
cy_writeb((cinfo->base_addr + tx_bufaddr + tx_put), data);
|
|
|
|
|
tx_put = (tx_put + 1) & (tx_bufsize - 1);
|
|
|
|
|
info->x_char = 0;
|
|
|
|
|
char_count--;
|
|
|
|
|
info->icount.tx++;
|
|
|
|
|
info->last_active = jiffies;
|
|
|
|
|
info->jiffies[2] = jiffies;
|
|
|
|
|
}
|
|
|
|
|
#ifdef BLOCKMOVE
|
|
|
|
|
while(0 < (small_count =
|
|
|
|
|
min_t(unsigned int, (tx_bufsize - tx_put),
|
|
|
|
|
min_t(unsigned int, (SERIAL_XMIT_SIZE - info->xmit_tail),
|
|
|
|
|
min_t(unsigned int, info->xmit_cnt, char_count))))) {
|
|
|
|
|
|
|
|
|
|
memcpy_toio((char *)(cinfo->base_addr + tx_bufaddr + tx_put),
|
|
|
|
|
&info->xmit_buf[info->xmit_tail],
|
|
|
|
|
small_count);
|
|
|
|
|
|
|
|
|
|
tx_put = (tx_put + small_count) & (tx_bufsize - 1);
|
|
|
|
|
char_count -= small_count;
|
|
|
|
|
info->icount.tx += small_count;
|
|
|
|
|
info->xmit_cnt -= small_count;
|
|
|
|
|
info->xmit_tail =
|
|
|
|
|
(info->xmit_tail + small_count) & (SERIAL_XMIT_SIZE - 1);
|
|
|
|
|
info->last_active = jiffies;
|
|
|
|
|
info->jiffies[2] = jiffies;
|
|
|
|
|
}
|
|
|
|
|
#else
|
|
|
|
|
while (info->xmit_cnt && char_count){
|
|
|
|
|
data = info->xmit_buf[info->xmit_tail];
|
|
|
|
|
info->xmit_cnt--;
|
|
|
|
|
info->xmit_tail = (info->xmit_tail + 1) & (SERIAL_XMIT_SIZE - 1);
|
|
|
|
|
|
|
|
|
|
cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
|
|
|
|
|
tx_put = (tx_put + 1) & (tx_bufsize - 1);
|
|
|
|
|
char_count--;
|
|
|
|
|
info->icount.tx++;
|
|
|
|
|
info->last_active = jiffies;
|
|
|
|
|
info->jiffies[2] = jiffies;
|
|
|
|
|
}
|
|
|
|
|
#endif
|
|
|
|
|
ztxdone:
|
|
|
|
|
if (info->xmit_cnt < WAKEUP_CHARS) {
|
|
|
|
|
cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP);
|
|
|
|
|
}
|
|
|
|
|
/* Update tx_put */
|
|
|
|
|
cy_writel(&buf_ctrl->tx_put, tx_put);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
|
cyz_handle_cmd(struct cyclades_card *cinfo)
|
|
|
|
|
{
|
|
|
|
|
struct tty_struct *tty;
|
|
|
|
|
struct cyclades_port *info;
|
|
|
|
|
static volatile struct FIRM_ID __iomem *firm_id;
|
|
|
|
|
static volatile struct ZFW_CTRL __iomem *zfw_ctrl;
|
|
|
|
|
static volatile struct BOARD_CTRL __iomem *board_ctrl;
|
|
|
|
|
static volatile struct CH_CTRL __iomem *ch_ctrl;
|
|
|
|
|
static volatile struct BUF_CTRL __iomem *buf_ctrl;
|
|
|
|
|
uclong channel;
|
|
|
|
|
ucchar cmd;
|
|
|
|
|
uclong param;
|
|
|
|
|
uclong hw_ver, fw_ver;
|
|
|
|
|
int special_count;
|
|
|
|
|
int delta_count;
|
|
|
|
|
|
|
|
|
|
firm_id = cinfo->base_addr + ID_ADDRESS;
|
|
|
|
|
zfw_ctrl = cinfo->base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
|
|
|
|
|
board_ctrl = &zfw_ctrl->board_ctrl;
|
|
|
|
|
fw_ver = cy_readl(&board_ctrl->fw_version);
|
|
|
|
|
hw_ver = cy_readl(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->mail_box_0);
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
while(cyz_fetch_msg(cinfo, &channel, &cmd, ¶m) == 1) {
|
|
|
|
|
special_count = 0;
|
|
|
|
|
delta_count = 0;
|
|
|
|
|
info = &cy_port[channel + cinfo->first_line];
|
|
|
|
|
if((tty = info->tty) == 0) {
|
|
|
|
|
continue;
|
|
|
|
|
}
|
|
|
|
|
ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
|
|
|
|
|
buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
|
|
|
|
|
|
|
|
|
|
switch(cmd) {
|
|
|
|
|
case C_CM_PR_ERROR:
|
[PATCH] TTY layer buffering revamp
The API and code have been through various bits of initial review by
serial driver people but they definitely need to live somewhere for a
while so the unconverted drivers can get knocked into shape, existing
drivers that have been updated can be better tuned and bugs whacked out.
This replaces the tty flip buffers with kmalloc objects in rings. In the
normal situation for an IRQ driven serial port at typical speeds the
behaviour is pretty much the same, two buffers end up allocated and the
kernel cycles between them as before.
When there are delays or at high speed we now behave far better as the
buffer pool can grow a bit rather than lose characters. This also means
that we can operate at higher speeds reliably.
For drivers that receive characters in blocks (DMA based, USB and
especially virtualisation) the layer allows a lot of driver specific
code that works around the tty layer with private secondary queues to be
removed. The IBM folks need this sort of layer, the smart serial port
people do, the virtualisers do (because a virtualised tty typically
operates at infinite speed rather than emulating 9600 baud).
Finally many drivers had invalid and unsafe attempts to avoid buffer
overflows by directly invoking tty methods extracted out of the innards
of work queue structs. These are no longer needed and all go away. That
fixes various random hangs with serial ports on overflow.
The other change in here is to optimise the receive_room path that is
used by some callers. It turns out that only one ldisc uses receive room
except asa constant and it updates it far far less than the value is
read. We thus make it a variable not a function call.
I expect the code to contain bugs due to the size alone but I'll be
watching and squashing them and feeding out new patches as it goes.
Because the buffers now dynamically expand you should only run out of
buffering when the kernel runs out of memory for real. That means a lot of
the horrible hacks high performance drivers used to do just aren't needed any
more.
Description:
tty_insert_flip_char is an old API and continues to work as before, as does
tty_flip_buffer_push() [this is why many drivers dont need modification]. It
does now also return the number of chars inserted
There are also
tty_buffer_request_room(tty, len)
which asks for a buffer block of the length requested and returns the space
found. This improves efficiency with hardware that knows how much to
transfer.
and tty_insert_flip_string_flags(tty, str, flags, len)
to insert a string of characters and flags
For a smart interface the usual code is
len = tty_request_buffer_room(tty, amount_hardware_says);
tty_insert_flip_string(tty, buffer_from_card, len);
More description!
At the moment tty buffers are attached directly to the tty. This is causing a
lot of the problems related to tty layer locking, also problems at high speed
and also with bursty data (such as occurs in virtualised environments)
I'm working on ripping out the flip buffers and replacing them with a pool of
dynamically allocated buffers. This allows both for old style "byte I/O"
devices and also helps virtualisation and smart devices where large blocks of
data suddenely materialise and need storing.
So far so good. Lots of drivers reference tty->flip.*. Several of them also
call directly and unsafely into function pointers it provides. This will all
break. Most drivers can use tty_insert_flip_char which can be kept as an API
but others need more.
At the moment I've added the following interfaces, if people think more will
be needed now is a good time to say
int tty_buffer_request_room(tty, size)
Try and ensure at least size bytes are available, returns actual room (may be
zero). At the moment it just uses the flipbuf space but that will change.
Repeated calls without characters being added are not cumulative. (ie if you
call it with 1, 1, 1, and then 4 you'll have four characters of space. The
other functions will also try and grow buffers in future but this will be a
more efficient way when you know block sizes.
int tty_insert_flip_char(tty, ch, flag)
As before insert a character if there is room. Now returns 1 for success, 0
for failure.
int tty_insert_flip_string(tty, str, len)
Insert a block of non error characters. Returns the number inserted.
int tty_prepare_flip_string(tty, strptr, len)
Adjust the buffer to allow len characters to be added. Returns a buffer
pointer in strptr and the length available. This allows for hardware that
needs to use functions like insl or mencpy_fromio.
Signed-off-by: Alan Cox <alan@redhat.com>
Cc: Paul Fulghum <paulkf@microgate.com>
Signed-off-by: Hirokazu Takata <takata@linux-m32r.org>
Signed-off-by: Serge Hallyn <serue@us.ibm.com>
Signed-off-by: Jeff Dike <jdike@addtoit.com>
Signed-off-by: John Hawkes <hawkes@sgi.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10 04:54:13 +00:00
|
|
|
tty_insert_flip_char(tty, 0, TTY_PARITY);
|
2005-04-16 22:20:36 +00:00
|
|
|
info->icount.rx++;
|
|
|
|
|
special_count++;
|
|
|
|
|
break;
|
|
|
|
|
case C_CM_FR_ERROR:
|
[PATCH] TTY layer buffering revamp
The API and code have been through various bits of initial review by
serial driver people but they definitely need to live somewhere for a
while so the unconverted drivers can get knocked into shape, existing
drivers that have been updated can be better tuned and bugs whacked out.
This replaces the tty flip buffers with kmalloc objects in rings. In the
normal situation for an IRQ driven serial port at typical speeds the
behaviour is pretty much the same, two buffers end up allocated and the
kernel cycles between them as before.
When there are delays or at high speed we now behave far better as the
buffer pool can grow a bit rather than lose characters. This also means
that we can operate at higher speeds reliably.
For drivers that receive characters in blocks (DMA based, USB and
especially virtualisation) the layer allows a lot of driver specific
code that works around the tty layer with private secondary queues to be
removed. The IBM folks need this sort of layer, the smart serial port
people do, the virtualisers do (because a virtualised tty typically
operates at infinite speed rather than emulating 9600 baud).
Finally many drivers had invalid and unsafe attempts to avoid buffer
overflows by directly invoking tty methods extracted out of the innards
of work queue structs. These are no longer needed and all go away. That
fixes various random hangs with serial ports on overflow.
The other change in here is to optimise the receive_room path that is
used by some callers. It turns out that only one ldisc uses receive room
except asa constant and it updates it far far less than the value is
read. We thus make it a variable not a function call.
I expect the code to contain bugs due to the size alone but I'll be
watching and squashing them and feeding out new patches as it goes.
Because the buffers now dynamically expand you should only run out of
buffering when the kernel runs out of memory for real. That means a lot of
the horrible hacks high performance drivers used to do just aren't needed any
more.
Description:
tty_insert_flip_char is an old API and continues to work as before, as does
tty_flip_buffer_push() [this is why many drivers dont need modification]. It
does now also return the number of chars inserted
There are also
tty_buffer_request_room(tty, len)
which asks for a buffer block of the length requested and returns the space
found. This improves efficiency with hardware that knows how much to
transfer.
and tty_insert_flip_string_flags(tty, str, flags, len)
to insert a string of characters and flags
For a smart interface the usual code is
len = tty_request_buffer_room(tty, amount_hardware_says);
tty_insert_flip_string(tty, buffer_from_card, len);
More description!
At the moment tty buffers are attached directly to the tty. This is causing a
lot of the problems related to tty layer locking, also problems at high speed
and also with bursty data (such as occurs in virtualised environments)
I'm working on ripping out the flip buffers and replacing them with a pool of
dynamically allocated buffers. This allows both for old style "byte I/O"
devices and also helps virtualisation and smart devices where large blocks of
data suddenely materialise and need storing.
So far so good. Lots of drivers reference tty->flip.*. Several of them also
call directly and unsafely into function pointers it provides. This will all
break. Most drivers can use tty_insert_flip_char which can be kept as an API
but others need more.
At the moment I've added the following interfaces, if people think more will
be needed now is a good time to say
int tty_buffer_request_room(tty, size)
Try and ensure at least size bytes are available, returns actual room (may be
zero). At the moment it just uses the flipbuf space but that will change.
Repeated calls without characters being added are not cumulative. (ie if you
call it with 1, 1, 1, and then 4 you'll have four characters of space. The
other functions will also try and grow buffers in future but this will be a
more efficient way when you know block sizes.
int tty_insert_flip_char(tty, ch, flag)
As before insert a character if there is room. Now returns 1 for success, 0
for failure.
int tty_insert_flip_string(tty, str, len)
Insert a block of non error characters. Returns the number inserted.
int tty_prepare_flip_string(tty, strptr, len)
Adjust the buffer to allow len characters to be added. Returns a buffer
pointer in strptr and the length available. This allows for hardware that
needs to use functions like insl or mencpy_fromio.
Signed-off-by: Alan Cox <alan@redhat.com>
Cc: Paul Fulghum <paulkf@microgate.com>
Signed-off-by: Hirokazu Takata <takata@linux-m32r.org>
Signed-off-by: Serge Hallyn <serue@us.ibm.com>
Signed-off-by: Jeff Dike <jdike@addtoit.com>
Signed-off-by: John Hawkes <hawkes@sgi.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10 04:54:13 +00:00
|
|
|
tty_insert_flip_char(tty, 0, TTY_FRAME);
|
2005-04-16 22:20:36 +00:00
|
|
|
info->icount.rx++;
|
|
|
|
|
special_count++;
|
|
|
|
|
break;
|
|
|
|
|
case C_CM_RXBRK:
|
[PATCH] TTY layer buffering revamp
The API and code have been through various bits of initial review by
serial driver people but they definitely need to live somewhere for a
while so the unconverted drivers can get knocked into shape, existing
drivers that have been updated can be better tuned and bugs whacked out.
This replaces the tty flip buffers with kmalloc objects in rings. In the
normal situation for an IRQ driven serial port at typical speeds the
behaviour is pretty much the same, two buffers end up allocated and the
kernel cycles between them as before.
When there are delays or at high speed we now behave far better as the
buffer pool can grow a bit rather than lose characters. This also means
that we can operate at higher speeds reliably.
For drivers that receive characters in blocks (DMA based, USB and
especially virtualisation) the layer allows a lot of driver specific
code that works around the tty layer with private secondary queues to be
removed. The IBM folks need this sort of layer, the smart serial port
people do, the virtualisers do (because a virtualised tty typically
operates at infinite speed rather than emulating 9600 baud).
Finally many drivers had invalid and unsafe attempts to avoid buffer
overflows by directly invoking tty methods extracted out of the innards
of work queue structs. These are no longer needed and all go away. That
fixes various random hangs with serial ports on overflow.
The other change in here is to optimise the receive_room path that is
used by some callers. It turns out that only one ldisc uses receive room
except asa constant and it updates it far far less than the value is
read. We thus make it a variable not a function call.
I expect the code to contain bugs due to the size alone but I'll be
watching and squashing them and feeding out new patches as it goes.
Because the buffers now dynamically expand you should only run out of
buffering when the kernel runs out of memory for real. That means a lot of
the horrible hacks high performance drivers used to do just aren't needed any
more.
Description:
tty_insert_flip_char is an old API and continues to work as before, as does
tty_flip_buffer_push() [this is why many drivers dont need modification]. It
does now also return the number of chars inserted
There are also
tty_buffer_request_room(tty, len)
which asks for a buffer block of the length requested and returns the space
found. This improves efficiency with hardware that knows how much to
transfer.
and tty_insert_flip_string_flags(tty, str, flags, len)
to insert a string of characters and flags
For a smart interface the usual code is
len = tty_request_buffer_room(tty, amount_hardware_says);
tty_insert_flip_string(tty, buffer_from_card, len);
More description!
At the moment tty buffers are attached directly to the tty. This is causing a
lot of the problems related to tty layer locking, also problems at high speed
and also with bursty data (such as occurs in virtualised environments)
I'm working on ripping out the flip buffers and replacing them with a pool of
dynamically allocated buffers. This allows both for old style "byte I/O"
devices and also helps virtualisation and smart devices where large blocks of
data suddenely materialise and need storing.
So far so good. Lots of drivers reference tty->flip.*. Several of them also
call directly and unsafely into function pointers it provides. This will all
break. Most drivers can use tty_insert_flip_char which can be kept as an API
but others need more.
At the moment I've added the following interfaces, if people think more will
be needed now is a good time to say
int tty_buffer_request_room(tty, size)
Try and ensure at least size bytes are available, returns actual room (may be
zero). At the moment it just uses the flipbuf space but that will change.
Repeated calls without characters being added are not cumulative. (ie if you
call it with 1, 1, 1, and then 4 you'll have four characters of space. The
other functions will also try and grow buffers in future but this will be a
more efficient way when you know block sizes.
int tty_insert_flip_char(tty, ch, flag)
As before insert a character if there is room. Now returns 1 for success, 0
for failure.
int tty_insert_flip_string(tty, str, len)
Insert a block of non error characters. Returns the number inserted.
int tty_prepare_flip_string(tty, strptr, len)
Adjust the buffer to allow len characters to be added. Returns a buffer
pointer in strptr and the length available. This allows for hardware that
needs to use functions like insl or mencpy_fromio.
Signed-off-by: Alan Cox <alan@redhat.com>
Cc: Paul Fulghum <paulkf@microgate.com>
Signed-off-by: Hirokazu Takata <takata@linux-m32r.org>
Signed-off-by: Serge Hallyn <serue@us.ibm.com>
Signed-off-by: Jeff Dike <jdike@addtoit.com>
Signed-off-by: John Hawkes <hawkes@sgi.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10 04:54:13 +00:00
|
|
|
tty_insert_flip_char(tty, 0, TTY_BREAK);
|
2005-04-16 22:20:36 +00:00
|
|
|
info->icount.rx++;
|
|
|
|
|
special_count++;
|
|
|
|
|
break;
|
|
|
|
|
case C_CM_MDCD:
|
|
|
|
|
info->icount.dcd++;
|
|
|
|
|
delta_count++;
|
|
|
|
|
if (info->flags & ASYNC_CHECK_CD){
|
|
|
|
|
if ((fw_ver > 241 ?
|
|
|
|
|
((u_long)param) :
|
|
|
|
|
cy_readl(&ch_ctrl->rs_status)) & C_RS_DCD) {
|
|
|
|
|
cy_sched_event(info, Cy_EVENT_OPEN_WAKEUP);
|
|
|
|
|
}else{
|
|
|
|
|
cy_sched_event(info, Cy_EVENT_HANGUP);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
break;
|
|
|
|
|
case C_CM_MCTS:
|
|
|
|
|
info->icount.cts++;
|
|
|
|
|
delta_count++;
|
|
|
|
|
break;
|
|
|
|
|
case C_CM_MRI:
|
|
|
|
|
info->icount.rng++;
|
|
|
|
|
delta_count++;
|
|
|
|
|
break;
|
|
|
|
|
case C_CM_MDSR:
|
|
|
|
|
info->icount.dsr++;
|
|
|
|
|
delta_count++;
|
|
|
|
|
break;
|
|
|
|
|
#ifdef Z_WAKE
|
|
|
|
|
case C_CM_IOCTLW:
|
|
|
|
|
cy_sched_event(info, Cy_EVENT_SHUTDOWN_WAKEUP);
|
|
|
|
|
break;
|
|
|
|
|
#endif
|
|
|
|
|
#ifdef CONFIG_CYZ_INTR
|
|
|
|
|
case C_CM_RXHIWM:
|
|
|
|
|
case C_CM_RXNNDT:
|
|
|
|
|
case C_CM_INTBACK2:
|
|
|
|
|
/* Reception Interrupt */
|
|
|
|
|
#ifdef CY_DEBUG_INTERRUPTS
|
|
|
|
|
printk("cyz_interrupt: rcvd intr, card %d, port %ld\n\r",
|
|
|
|
|
info->card, channel);
|
|
|
|
|
#endif
|
|
|
|
|
cyz_handle_rx(info, ch_ctrl, buf_ctrl);
|
|
|
|
|
break;
|
|
|
|
|
case C_CM_TXBEMPTY:
|
|
|
|
|
case C_CM_TXLOWWM:
|
|
|
|
|
case C_CM_INTBACK:
|
|
|
|
|
/* Transmission Interrupt */
|
|
|
|
|
#ifdef CY_DEBUG_INTERRUPTS
|
|
|
|
|
printk("cyz_interrupt: xmit intr, card %d, port %ld\n\r",
|
|
|
|
|
info->card, channel);
|
|
|
|
|
#endif
|
|
|
|
|
cyz_handle_tx(info, ch_ctrl, buf_ctrl);
|
|
|
|
|
break;
|
|
|
|
|
#endif /* CONFIG_CYZ_INTR */
|
|
|
|
|
case C_CM_FATAL:
|
|
|
|
|
/* should do something with this !!! */
|
|
|
|
|
break;
|
|
|
|
|
default:
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
if(delta_count)
|
|
|
|
|
cy_sched_event(info, Cy_EVENT_DELTA_WAKEUP);
|
|
|
|
|
if(special_count)
|
2006-02-03 11:04:41 +00:00
|
|
|
tty_schedule_flip(tty);
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
#ifdef CONFIG_CYZ_INTR
|
|
|
|
|
static irqreturn_t
|
IRQ: Maintain regs pointer globally rather than passing to IRQ handlers
Maintain a per-CPU global "struct pt_regs *" variable which can be used instead
of passing regs around manually through all ~1800 interrupt handlers in the
Linux kernel.
The regs pointer is used in few places, but it potentially costs both stack
space and code to pass it around. On the FRV arch, removing the regs parameter
from all the genirq function results in a 20% speed up of the IRQ exit path
(ie: from leaving timer_interrupt() to leaving do_IRQ()).
Where appropriate, an arch may override the generic storage facility and do
something different with the variable. On FRV, for instance, the address is
maintained in GR28 at all times inside the kernel as part of general exception
handling.
Having looked over the code, it appears that the parameter may be handed down
through up to twenty or so layers of functions. Consider a USB character
device attached to a USB hub, attached to a USB controller that posts its
interrupts through a cascaded auxiliary interrupt controller. A character
device driver may want to pass regs to the sysrq handler through the input
layer which adds another few layers of parameter passing.
I've build this code with allyesconfig for x86_64 and i386. I've runtested the
main part of the code on FRV and i386, though I can't test most of the drivers.
I've also done partial conversion for powerpc and MIPS - these at least compile
with minimal configurations.
This will affect all archs. Mostly the changes should be relatively easy.
Take do_IRQ(), store the regs pointer at the beginning, saving the old one:
struct pt_regs *old_regs = set_irq_regs(regs);
And put the old one back at the end:
set_irq_regs(old_regs);
Don't pass regs through to generic_handle_irq() or __do_IRQ().
In timer_interrupt(), this sort of change will be necessary:
- update_process_times(user_mode(regs));
- profile_tick(CPU_PROFILING, regs);
+ update_process_times(user_mode(get_irq_regs()));
+ profile_tick(CPU_PROFILING);
I'd like to move update_process_times()'s use of get_irq_regs() into itself,
except that i386, alone of the archs, uses something other than user_mode().
Some notes on the interrupt handling in the drivers:
(*) input_dev() is now gone entirely. The regs pointer is no longer stored in
the input_dev struct.
(*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking. It does
something different depending on whether it's been supplied with a regs
pointer or not.
(*) Various IRQ handler function pointers have been moved to type
irq_handler_t.
Signed-Off-By: David Howells <dhowells@redhat.com>
(cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-05 13:55:46 +00:00
|
|
|
cyz_interrupt(int irq, void *dev_id)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
|
|
|
|
struct cyclades_card *cinfo;
|
|
|
|
|
|
|
|
|
|
if((cinfo = (struct cyclades_card *)dev_id) == 0){
|
|
|
|
|
#ifdef CY_DEBUG_INTERRUPTS
|
|
|
|
|
printk("cyz_interrupt: spurious interrupt %d\n\r", irq);
|
|
|
|
|
#endif
|
|
|
|
|
return IRQ_NONE; /* spurious interrupt */
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (!ISZLOADED(*cinfo)) {
|
|
|
|
|
#ifdef CY_DEBUG_INTERRUPTS
|
|
|
|
|
printk("cyz_interrupt: board not yet loaded (IRQ%d).\n\r", irq);
|
|
|
|
|
#endif
|
|
|
|
|
return IRQ_NONE;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Handle the interrupts */
|
|
|
|
|
cyz_handle_cmd(cinfo);
|
|
|
|
|
|
|
|
|
|
return IRQ_HANDLED;
|
|
|
|
|
} /* cyz_interrupt */
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
|
cyz_rx_restart(unsigned long arg)
|
|
|
|
|
{
|
|
|
|
|
struct cyclades_port *info = (struct cyclades_port *)arg;
|
|
|
|
|
int retval;
|
|
|
|
|
int card = info->card;
|
|
|
|
|
uclong channel = (info->line) - (cy_card[card].first_line);
|
|
|
|
|
unsigned long flags;
|
|
|
|
|
|
|
|
|
|
CY_LOCK(info, flags);
|
|
|
|
|
retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_INTBACK2, 0L);
|
|
|
|
|
if (retval != 0){
|
|
|
|
|
printk("cyc:cyz_rx_restart retval on ttyC%d was %x\n",
|
|
|
|
|
info->line, retval);
|
|
|
|
|
}
|
|
|
|
|
cyz_rx_full_timer[info->line].function = NULL;
|
|
|
|
|
CY_UNLOCK(info, flags);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
#else /* CONFIG_CYZ_INTR */
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
|
cyz_poll(unsigned long arg)
|
|
|
|
|
{
|
|
|
|
|
struct cyclades_card *cinfo;
|
|
|
|
|
struct cyclades_port *info;
|
|
|
|
|
struct tty_struct *tty;
|
|
|
|
|
static volatile struct FIRM_ID *firm_id;
|
|
|
|
|
static volatile struct ZFW_CTRL *zfw_ctrl;
|
|
|
|
|
static volatile struct BOARD_CTRL *board_ctrl;
|
|
|
|
|
static volatile struct CH_CTRL *ch_ctrl;
|
|
|
|
|
static volatile struct BUF_CTRL *buf_ctrl;
|
|
|
|
|
int card, port;
|
|
|
|
|
|
|
|
|
|
cyz_timerlist.expires = jiffies + (HZ);
|
|
|
|
|
for (card = 0 ; card < NR_CARDS ; card++){
|
|
|
|
|
cinfo = &cy_card[card];
|
|
|
|
|
|
|
|
|
|
if (!IS_CYC_Z(*cinfo)) continue;
|
|
|
|
|
if (!ISZLOADED(*cinfo)) continue;
|
|
|
|
|
|
|
|
|
|
firm_id = cinfo->base_addr + ID_ADDRESS;
|
|
|
|
|
zfw_ctrl = cinfo->base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
|
|
|
|
|
board_ctrl = &(zfw_ctrl->board_ctrl);
|
|
|
|
|
|
|
|
|
|
/* Skip first polling cycle to avoid racing conditions with the FW */
|
|
|
|
|
if (!cinfo->intr_enabled) {
|
|
|
|
|
cinfo->nports = (int) cy_readl(&board_ctrl->n_channel);
|
|
|
|
|
cinfo->intr_enabled = 1;
|
|
|
|
|
continue;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
cyz_handle_cmd(cinfo);
|
|
|
|
|
|
|
|
|
|
for (port = 0 ; port < cinfo->nports ; port++) {
|
|
|
|
|
info = &cy_port[ port + cinfo->first_line ];
|
|
|
|
|
tty = info->tty;
|
|
|
|
|
ch_ctrl = &(zfw_ctrl->ch_ctrl[port]);
|
|
|
|
|
buf_ctrl = &(zfw_ctrl->buf_ctrl[port]);
|
|
|
|
|
|
|
|
|
|
if (!info->throttle)
|
|
|
|
|
cyz_handle_rx(info, ch_ctrl, buf_ctrl);
|
|
|
|
|
cyz_handle_tx(info, ch_ctrl, buf_ctrl);
|
|
|
|
|
}
|
|
|
|
|
/* poll every 'cyz_polling_cycle' period */
|
|
|
|
|
cyz_timerlist.expires = jiffies + cyz_polling_cycle;
|
|
|
|
|
}
|
|
|
|
|
add_timer(&cyz_timerlist);
|
|
|
|
|
|
|
|
|
|
return;
|
|
|
|
|
} /* cyz_poll */
|
|
|
|
|
|
|
|
|
|
#endif /* CONFIG_CYZ_INTR */
|
|
|
|
|
|
|
|
|
|
/********** End of block of Cyclades-Z specific code *********/
|
|
|
|
|
/***********************************************************/
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/* This is called whenever a port becomes active;
|
|
|
|
|
interrupts are enabled and DTR & RTS are turned on.
|
|
|
|
|
*/
|
|
|
|
|
static int
|
|
|
|
|
startup(struct cyclades_port * info)
|
|
|
|
|
{
|
|
|
|
|
unsigned long flags;
|
|
|
|
|
int retval = 0;
|
|
|
|
|
void __iomem *base_addr;
|
|
|
|
|
int card,chip,channel,index;
|
|
|
|
|
unsigned long page;
|
|
|
|
|
|
|
|
|
|
card = info->card;
|
|
|
|
|
channel = (info->line) - (cy_card[card].first_line);
|
|
|
|
|
|
|
|
|
|
page = get_zeroed_page(GFP_KERNEL);
|
|
|
|
|
if (!page)
|
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
|
|
CY_LOCK(info, flags);
|
|
|
|
|
|
|
|
|
|
if (info->flags & ASYNC_INITIALIZED){
|
|
|
|
|
free_page(page);
|
|
|
|
|
goto errout;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (!info->type){
|
|
|
|
|
if (info->tty){
|
|
|
|
|
set_bit(TTY_IO_ERROR, &info->tty->flags);
|
|
|
|
|
}
|
|
|
|
|
free_page(page);
|
|
|
|
|
goto errout;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (info->xmit_buf)
|
|
|
|
|
free_page(page);
|
|
|
|
|
else
|
|
|
|
|
info->xmit_buf = (unsigned char *) page;
|
|
|
|
|
|
|
|
|
|
CY_UNLOCK(info, flags);
|
|
|
|
|
|
|
|
|
|
set_line_char(info);
|
|
|
|
|
|
|
|
|
|
if (!IS_CYC_Z(cy_card[card])) {
|
|
|
|
|
chip = channel>>2;
|
|
|
|
|
channel &= 0x03;
|
|
|
|
|
index = cy_card[card].bus_index;
|
|
|
|
|
base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
|
|
|
|
|
|
|
|
|
|
#ifdef CY_DEBUG_OPEN
|
|
|
|
|
printk("cyc startup card %d, chip %d, channel %d, base_addr %lx\n",
|
|
|
|
|
card, chip, channel, (long)base_addr);/**/
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
CY_LOCK(info, flags);
|
|
|
|
|
|
|
|
|
|
cy_writeb(base_addr+(CyCAR<<index), (u_char)channel);
|
|
|
|
|
|
|
|
|
|
cy_writeb(base_addr+(CyRTPR<<index), (info->default_timeout
|
|
|
|
|
? info->default_timeout : 0x02)); /* 10ms rx timeout */
|
|
|
|
|
|
|
|
|
|
cyy_issue_cmd(base_addr,CyCHAN_CTL|CyENB_RCVR|CyENB_XMTR,index);
|
|
|
|
|
|
|
|
|
|
cy_writeb(base_addr+(CyCAR<<index), (u_char)channel);
|
|
|
|
|
cy_writeb(base_addr+(CyMSVR1<<index), CyRTS);
|
|
|
|
|
cy_writeb(base_addr+(CyMSVR2<<index), CyDTR);
|
|
|
|
|
|
|
|
|
|
#ifdef CY_DEBUG_DTR
|
|
|
|
|
printk("cyc:startup raising DTR\n");
|
|
|
|
|
printk(" status: 0x%x, 0x%x\n",
|
|
|
|
|
cy_readb(base_addr+(CyMSVR1<<index)),
|
|
|
|
|
cy_readb(base_addr+(CyMSVR2<<index)));
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
cy_writeb(base_addr+(CySRER<<index),
|
|
|
|
|
cy_readb(base_addr+(CySRER<<index)) | CyRxData);
|
|
|
|
|
info->flags |= ASYNC_INITIALIZED;
|
|
|
|
|
|
|
|
|
|
if (info->tty){
|
|
|
|
|
clear_bit(TTY_IO_ERROR, &info->tty->flags);
|
|
|
|
|
}
|
|
|
|
|
info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
|
|
|
|
|
info->breakon = info->breakoff = 0;
|
|
|
|
|
memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
|
|
|
|
|
info->idle_stats.in_use =
|
|
|
|
|
info->idle_stats.recv_idle =
|
|
|
|
|
info->idle_stats.xmit_idle = jiffies;
|
|
|
|
|
|
|
|
|
|
CY_UNLOCK(info, flags);
|
|
|
|
|
|
|
|
|
|
} else {
|
|
|
|
|
struct FIRM_ID __iomem *firm_id;
|
|
|
|
|
struct ZFW_CTRL __iomem *zfw_ctrl;
|
|
|
|
|
struct BOARD_CTRL __iomem *board_ctrl;
|
|
|
|
|
struct CH_CTRL __iomem *ch_ctrl;
|
|
|
|
|
int retval;
|
|
|
|
|
|
|
|
|
|
base_addr = cy_card[card].base_addr;
|
|
|
|
|
|
|
|
|
|
firm_id = base_addr + ID_ADDRESS;
|
|
|
|
|
if (!ISZLOADED(cy_card[card])){
|
|
|
|
|
return -ENODEV;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
zfw_ctrl = cy_card[card].base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
|
|
|
|
|
board_ctrl = &zfw_ctrl->board_ctrl;
|
|
|
|
|
ch_ctrl = zfw_ctrl->ch_ctrl;
|
|
|
|
|
|
|
|
|
|
#ifdef CY_DEBUG_OPEN
|
|
|
|
|
printk("cyc startup Z card %d, channel %d, base_addr %lx\n",
|
|
|
|
|
card, channel, (long)base_addr);/**/
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
CY_LOCK(info, flags);
|
|
|
|
|
|
|
|
|
|
cy_writel(&ch_ctrl[channel].op_mode, C_CH_ENABLE);
|
|
|
|
|
#ifdef Z_WAKE
|
|
|
|
|
#ifdef CONFIG_CYZ_INTR
|
|
|
|
|
cy_writel(&ch_ctrl[channel].intr_enable,
|
|
|
|
|
C_IN_TXBEMPTY|C_IN_TXLOWWM|C_IN_RXHIWM|C_IN_RXNNDT|
|
|
|
|
|
C_IN_IOCTLW|
|
|
|
|
|
C_IN_MDCD);
|
|
|
|
|
#else
|
|
|
|
|
cy_writel(&ch_ctrl[channel].intr_enable,
|
|
|
|
|
C_IN_IOCTLW|
|
|
|
|
|
C_IN_MDCD);
|
|
|
|
|
#endif /* CONFIG_CYZ_INTR */
|
|
|
|
|
#else
|
|
|
|
|
#ifdef CONFIG_CYZ_INTR
|
|
|
|
|
cy_writel(&ch_ctrl[channel].intr_enable,
|
|
|
|
|
C_IN_TXBEMPTY|C_IN_TXLOWWM|C_IN_RXHIWM|C_IN_RXNNDT|
|
|
|
|
|
C_IN_MDCD);
|
|
|
|
|
#else
|
|
|
|
|
cy_writel(&ch_ctrl[channel].intr_enable,
|
|
|
|
|
C_IN_MDCD);
|
|
|
|
|
#endif /* CONFIG_CYZ_INTR */
|
|
|
|
|
#endif /* Z_WAKE */
|
|
|
|
|
|
|
|
|
|
retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_IOCTL, 0L);
|
|
|
|
|
if (retval != 0){
|
|
|
|
|
printk("cyc:startup(1) retval on ttyC%d was %x\n",
|
|
|
|
|
info->line, retval);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Flush RX buffers before raising DTR and RTS */
|
|
|
|
|
retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_FLUSH_RX, 0L);
|
|
|
|
|
if (retval != 0){
|
|
|
|
|
printk("cyc:startup(2) retval on ttyC%d was %x\n",
|
|
|
|
|
info->line, retval);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* set timeout !!! */
|
|
|
|
|
/* set RTS and DTR !!! */
|
|
|
|
|
cy_writel(&ch_ctrl[channel].rs_control,
|
|
|
|
|
cy_readl(&ch_ctrl[channel].rs_control) | C_RS_RTS | C_RS_DTR) ;
|
|
|
|
|
retval = cyz_issue_cmd(&cy_card[info->card],
|
|
|
|
|
channel, C_CM_IOCTLM, 0L);
|
|
|
|
|
if (retval != 0){
|
|
|
|
|
printk("cyc:startup(3) retval on ttyC%d was %x\n",
|
|
|
|
|
info->line, retval);
|
|
|
|
|
}
|
|
|
|
|
#ifdef CY_DEBUG_DTR
|
|
|
|
|
printk("cyc:startup raising Z DTR\n");
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
/* enable send, recv, modem !!! */
|
|
|
|
|
|
|
|
|
|
info->flags |= ASYNC_INITIALIZED;
|
|
|
|
|
if (info->tty){
|
|
|
|
|
clear_bit(TTY_IO_ERROR, &info->tty->flags);
|
|
|
|
|
}
|
|
|
|
|
info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
|
|
|
|
|
info->breakon = info->breakoff = 0;
|
|
|
|
|
memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
|
|
|
|
|
info->idle_stats.in_use =
|
|
|
|
|
info->idle_stats.recv_idle =
|
|
|
|
|
info->idle_stats.xmit_idle = jiffies;
|
|
|
|
|
|
|
|
|
|
CY_UNLOCK(info, flags);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
#ifdef CY_DEBUG_OPEN
|
|
|
|
|
printk(" cyc startup done\n");
|
|
|
|
|
#endif
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
|
|
errout:
|
|
|
|
|
CY_UNLOCK(info, flags);
|
|
|
|
|
return retval;
|
|
|
|
|
} /* startup */
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
|
start_xmit( struct cyclades_port *info )
|
|
|
|
|
{
|
|
|
|
|
unsigned long flags;
|
|
|
|
|
void __iomem *base_addr;
|
|
|
|
|
int card,chip,channel,index;
|
|
|
|
|
|
|
|
|
|
card = info->card;
|
|
|
|
|
channel = (info->line) - (cy_card[card].first_line);
|
|
|
|
|
if (!IS_CYC_Z(cy_card[card])) {
|
|
|
|
|
chip = channel>>2;
|
|
|
|
|
channel &= 0x03;
|
|
|
|
|
index = cy_card[card].bus_index;
|
|
|
|
|
base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
|
|
|
|
|
|
|
|
|
|
CY_LOCK(info, flags);
|
|
|
|
|
cy_writeb(base_addr+(CyCAR<<index), channel);
|
|
|
|
|
cy_writeb(base_addr+(CySRER<<index),
|
|
|
|
|
cy_readb(base_addr+(CySRER<<index)) | CyTxRdy);
|
|
|
|
|
CY_UNLOCK(info, flags);
|
|
|
|
|
} else {
|
|
|
|
|
#ifdef CONFIG_CYZ_INTR
|
|
|
|
|
int retval;
|
|
|
|
|
|
|
|
|
|
CY_LOCK(info, flags);
|
|
|
|
|
retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_INTBACK, 0L);
|
|
|
|
|
if (retval != 0){
|
|
|
|
|
printk("cyc:start_xmit retval on ttyC%d was %x\n",
|
|
|
|
|
info->line, retval);
|
|
|
|
|
}
|
|
|
|
|
CY_UNLOCK(info, flags);
|
|
|
|
|
#else /* CONFIG_CYZ_INTR */
|
|
|
|
|
/* Don't have to do anything at this time */
|
|
|
|
|
#endif /* CONFIG_CYZ_INTR */
|
|
|
|
|
}
|
|
|
|
|
} /* start_xmit */
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* This routine shuts down a serial port; interrupts are disabled,
|
|
|
|
|
* and DTR is dropped if the hangup on close termio flag is on.
|
|
|
|
|
*/
|
|
|
|
|
static void
|
|
|
|
|
shutdown(struct cyclades_port * info)
|
|
|
|
|
{
|
|
|
|
|
unsigned long flags;
|
|
|
|
|
void __iomem *base_addr;
|
|
|
|
|
int card,chip,channel,index;
|
|
|
|
|
|
|
|
|
|
if (!(info->flags & ASYNC_INITIALIZED)){
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
card = info->card;
|
|
|
|
|
channel = info->line - cy_card[card].first_line;
|
|
|
|
|
if (!IS_CYC_Z(cy_card[card])) {
|
|
|
|
|
chip = channel>>2;
|
|
|
|
|
channel &= 0x03;
|
|
|
|
|
index = cy_card[card].bus_index;
|
|
|
|
|
base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
|
|
|
|
|
|
|
|
|
|
#ifdef CY_DEBUG_OPEN
|
|
|
|
|
printk("cyc shutdown Y card %d, chip %d, channel %d, base_addr %lx\n",
|
|
|
|
|
card, chip, channel, (long)base_addr);
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
CY_LOCK(info, flags);
|
|
|
|
|
|
|
|
|
|
/* Clear delta_msr_wait queue to avoid mem leaks. */
|
|
|
|
|
wake_up_interruptible(&info->delta_msr_wait);
|
|
|
|
|
|
|
|
|
|
if (info->xmit_buf){
|
|
|
|
|
unsigned char * temp;
|
|
|
|
|
temp = info->xmit_buf;
|
|
|
|
|
info->xmit_buf = NULL;
|
|
|
|
|
free_page((unsigned long) temp);
|
|
|
|
|
}
|
|
|
|
|
cy_writeb(base_addr+(CyCAR<<index), (u_char)channel);
|
|
|
|
|
if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
|
|
|
|
|
cy_writeb(base_addr+(CyMSVR1<<index), ~CyRTS);
|
|
|
|
|
cy_writeb(base_addr+(CyMSVR2<<index), ~CyDTR);
|
|
|
|
|
#ifdef CY_DEBUG_DTR
|
|
|
|
|
printk("cyc shutdown dropping DTR\n");
|
|
|
|
|
printk(" status: 0x%x, 0x%x\n",
|
|
|
|
|
cy_readb(base_addr+(CyMSVR1<<index)),
|
|
|
|
|
cy_readb(base_addr+(CyMSVR2<<index)));
|
|
|
|
|
#endif
|
|
|
|
|
}
|
|
|
|
|
cyy_issue_cmd(base_addr,CyCHAN_CTL|CyDIS_RCVR,index);
|
|
|
|
|
/* it may be appropriate to clear _XMIT at
|
|
|
|
|
some later date (after testing)!!! */
|
|
|
|
|
|
|
|
|
|
if (info->tty){
|
|
|
|
|
set_bit(TTY_IO_ERROR, &info->tty->flags);
|
|
|
|
|
}
|
|
|
|
|
info->flags &= ~ASYNC_INITIALIZED;
|
|
|
|
|
CY_UNLOCK(info, flags);
|
|
|
|
|
} else {
|
|
|
|
|
struct FIRM_ID __iomem *firm_id;
|
|
|
|
|
struct ZFW_CTRL __iomem *zfw_ctrl;
|
|
|
|
|
struct BOARD_CTRL __iomem *board_ctrl;
|
|
|
|
|
struct CH_CTRL __iomem *ch_ctrl;
|
|
|
|
|
int retval;
|
|
|
|
|
|
|
|
|
|
base_addr = cy_card[card].base_addr;
|
|
|
|
|
#ifdef CY_DEBUG_OPEN
|
|
|
|
|
printk("cyc shutdown Z card %d, channel %d, base_addr %lx\n",
|
|
|
|
|
card, channel, (long)base_addr);
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
firm_id = base_addr + ID_ADDRESS;
|
|
|
|
|
if (!ISZLOADED(cy_card[card])) {
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
zfw_ctrl = cy_card[card].base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
|
|
|
|
|
board_ctrl = &zfw_ctrl->board_ctrl;
|
|
|
|
|
ch_ctrl = zfw_ctrl->ch_ctrl;
|
|
|
|
|
|
|
|
|
|
CY_LOCK(info, flags);
|
|
|
|
|
|
|
|
|
|
if (info->xmit_buf){
|
|
|
|
|
unsigned char * temp;
|
|
|
|
|
temp = info->xmit_buf;
|
|
|
|
|
info->xmit_buf = NULL;
|
|
|
|
|
free_page((unsigned long) temp);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
|
|
|
|
|
cy_writel(&ch_ctrl[channel].rs_control,
|
|
|
|
|
(uclong)(cy_readl(&ch_ctrl[channel].rs_control) &
|
|
|
|
|
~(C_RS_RTS | C_RS_DTR)));
|
|
|
|
|
retval = cyz_issue_cmd(&cy_card[info->card],
|
|
|
|
|
channel, C_CM_IOCTLM, 0L);
|
|
|
|
|
if (retval != 0){
|
|
|
|
|
printk("cyc:shutdown retval on ttyC%d was %x\n",
|
|
|
|
|
info->line, retval);
|
|
|
|
|
}
|
|
|
|
|
#ifdef CY_DEBUG_DTR
|
|
|
|
|
printk("cyc:shutdown dropping Z DTR\n");
|
|
|
|
|
#endif
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (info->tty){
|
|
|
|
|
set_bit(TTY_IO_ERROR, &info->tty->flags);
|
|
|
|
|
}
|
|
|
|
|
info->flags &= ~ASYNC_INITIALIZED;
|
|
|
|
|
|
|
|
|
|
CY_UNLOCK(info, flags);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
#ifdef CY_DEBUG_OPEN
|
|
|
|
|
printk(" cyc shutdown done\n");
|
|
|
|
|
#endif
|
|
|
|
|
return;
|
|
|
|
|
} /* shutdown */
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* ------------------------------------------------------------
|
|
|
|
|
* cy_open() and friends
|
|
|
|
|
* ------------------------------------------------------------
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
static int
|
|
|
|
|
block_til_ready(struct tty_struct *tty, struct file * filp,
|
|
|
|
|
struct cyclades_port *info)
|
|
|
|
|
{
|
|
|
|
|
DECLARE_WAITQUEUE(wait, current);
|
|
|
|
|
struct cyclades_card *cinfo;
|
|
|
|
|
unsigned long flags;
|
|
|
|
|
int chip, channel,index;
|
|
|
|
|
int retval;
|
|
|
|
|
void __iomem *base_addr;
|
|
|
|
|
|
|
|
|
|
cinfo = &cy_card[info->card];
|
|
|
|
|
channel = info->line - cinfo->first_line;
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* If the device is in the middle of being closed, then block
|
|
|
|
|
* until it's done, and then try again.
|
|
|
|
|
*/
|
|
|
|
|
if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
|
|
|
|
|
if (info->flags & ASYNC_CLOSING) {
|
|
|
|
|
interruptible_sleep_on(&info->close_wait);
|
|
|
|
|
}
|
|
|
|
|
return ((info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN : -ERESTARTSYS);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* If non-blocking mode is set, then make the check up front
|
|
|
|
|
* and then exit.
|
|
|
|
|
*/
|
|
|
|
|
if ((filp->f_flags & O_NONBLOCK) ||
|
|
|
|
|
(tty->flags & (1 << TTY_IO_ERROR))) {
|
|
|
|
|
info->flags |= ASYNC_NORMAL_ACTIVE;
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Block waiting for the carrier detect and the line to become
|
|
|
|
|
* free (i.e., not in use by the callout). While we are in
|
|
|
|
|
* this loop, info->count is dropped by one, so that
|
|
|
|
|
* cy_close() knows when to free things. We restore it upon
|
|
|
|
|
* exit, either normal or abnormal.
|
|
|
|
|
*/
|
|
|
|
|
retval = 0;
|
|
|
|
|
add_wait_queue(&info->open_wait, &wait);
|
|
|
|
|
#ifdef CY_DEBUG_OPEN
|
|
|
|
|
printk("cyc block_til_ready before block: ttyC%d, count = %d\n",
|
|
|
|
|
info->line, info->count);/**/
|
|
|
|
|
#endif
|
|
|
|
|
CY_LOCK(info, flags);
|
|
|
|
|
if (!tty_hung_up_p(filp))
|
|
|
|
|
info->count--;
|
|
|
|
|
CY_UNLOCK(info, flags);
|
|
|
|
|
#ifdef CY_DEBUG_COUNT
|
|
|
|
|
printk("cyc block_til_ready: (%d): decrementing count to %d\n",
|
|
|
|
|
current->pid, info->count);
|
|
|
|
|
#endif
|
|
|
|
|
info->blocked_open++;
|
|
|
|
|
|
|
|
|
|
if (!IS_CYC_Z(*cinfo)) {
|
|
|
|
|
chip = channel>>2;
|
|
|
|
|
channel &= 0x03;
|
|
|
|
|
index = cinfo->bus_index;
|
|
|
|
|
base_addr = cinfo->base_addr + (cy_chip_offset[chip]<<index);
|
|
|
|
|
|
|
|
|
|
while (1) {
|
|
|
|
|
CY_LOCK(info, flags);
|
|
|
|
|
if ((tty->termios->c_cflag & CBAUD)){
|
|
|
|
|
cy_writeb(base_addr+(CyCAR<<index), (u_char)channel);
|
|
|
|
|
cy_writeb(base_addr+(CyMSVR1<<index), CyRTS);
|
|
|
|
|
cy_writeb(base_addr+(CyMSVR2<<index), CyDTR);
|
|
|
|
|
#ifdef CY_DEBUG_DTR
|
|
|
|
|
printk("cyc:block_til_ready raising DTR\n");
|
|
|
|
|
printk(" status: 0x%x, 0x%x\n",
|
|
|
|
|
cy_readb(base_addr+(CyMSVR1<<index)),
|
|
|
|
|
cy_readb(base_addr+(CyMSVR2<<index)));
|
|
|
|
|
#endif
|
|
|
|
|
}
|
|
|
|
|
CY_UNLOCK(info, flags);
|
|
|
|
|
|
|
|
|
|
set_current_state(TASK_INTERRUPTIBLE);
|
|
|
|
|
if (tty_hung_up_p(filp)
|
|
|
|
|
|| !(info->flags & ASYNC_INITIALIZED) ){
|
|
|
|
|
retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
|
|
|
|
|
-EAGAIN : -ERESTARTSYS);
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
CY_LOCK(info, flags);
|
|
|
|
|
cy_writeb(base_addr+(CyCAR<<index), (u_char)channel);
|
|
|
|
|
if (!(info->flags & ASYNC_CLOSING)
|
|
|
|
|
&& (C_CLOCAL(tty)
|
|
|
|
|
|| (cy_readb(base_addr+(CyMSVR1<<index)) & CyDCD))) {
|
|
|
|
|
CY_UNLOCK(info, flags);
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
CY_UNLOCK(info, flags);
|
|
|
|
|
|
|
|
|
|
if (signal_pending(current)) {
|
|
|
|
|
retval = -ERESTARTSYS;
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
#ifdef CY_DEBUG_OPEN
|
|
|
|
|
printk("cyc block_til_ready blocking: ttyC%d, count = %d\n",
|
|
|
|
|
info->line, info->count);/**/
|
|
|
|
|
#endif
|
|
|
|
|
schedule();
|
|
|
|
|
}
|
|
|
|
|
} else {
|
|
|
|
|
struct FIRM_ID __iomem *firm_id;
|
|
|
|
|
struct ZFW_CTRL __iomem *zfw_ctrl;
|
|
|
|
|
struct BOARD_CTRL __iomem *board_ctrl;
|
|
|
|
|
struct CH_CTRL __iomem *ch_ctrl;
|
|
|
|
|
int retval;
|
|
|
|
|
|
|
|
|
|
base_addr = cinfo->base_addr;
|
|
|
|
|
firm_id = base_addr + ID_ADDRESS;
|
|
|
|
|
if (!ISZLOADED(*cinfo)){
|
|
|
|
|
current->state = TASK_RUNNING;
|
|
|
|
|
remove_wait_queue(&info->open_wait, &wait);
|
|
|
|
|
return -EINVAL;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
zfw_ctrl = base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
|
|
|
|
|
board_ctrl = &zfw_ctrl->board_ctrl;
|
|
|
|
|
ch_ctrl = zfw_ctrl->ch_ctrl;
|
|
|
|
|
|
|
|
|
|
while (1) {
|
|
|
|
|
if ((tty->termios->c_cflag & CBAUD)){
|
|
|
|
|
cy_writel(&ch_ctrl[channel].rs_control,
|
|
|
|
|
cy_readl(&ch_ctrl[channel].rs_control) |
|
|
|
|
|
(C_RS_RTS | C_RS_DTR));
|
|
|
|
|
retval = cyz_issue_cmd(&cy_card[info->card],
|
|
|
|
|
channel, C_CM_IOCTLM, 0L);
|
|
|
|
|
if (retval != 0){
|
|
|
|
|
printk("cyc:block_til_ready retval on ttyC%d was %x\n",
|
|
|
|
|
info->line, retval);
|
|
|
|
|
}
|
|
|
|
|
#ifdef CY_DEBUG_DTR
|
|
|
|
|
printk("cyc:block_til_ready raising Z DTR\n");
|
|
|
|
|
#endif
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
set_current_state(TASK_INTERRUPTIBLE);
|
|
|
|
|
if (tty_hung_up_p(filp)
|
|
|
|
|
|| !(info->flags & ASYNC_INITIALIZED) ){
|
|
|
|
|
retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
|
|
|
|
|
-EAGAIN : -ERESTARTSYS);
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
if (!(info->flags & ASYNC_CLOSING)
|
|
|
|
|
&& (C_CLOCAL(tty)
|
|
|
|
|
|| (cy_readl(&ch_ctrl[channel].rs_status) & C_RS_DCD))) {
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
if (signal_pending(current)) {
|
|
|
|
|
retval = -ERESTARTSYS;
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
#ifdef CY_DEBUG_OPEN
|
|
|
|
|
printk("cyc block_til_ready blocking: ttyC%d, count = %d\n",
|
|
|
|
|
info->line, info->count);/**/
|
|
|
|
|
#endif
|
|
|
|
|
schedule();
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
current->state = TASK_RUNNING;
|
|
|
|
|
remove_wait_queue(&info->open_wait, &wait);
|
|
|
|
|
if (!tty_hung_up_p(filp)){
|
|
|
|
|
info->count++;
|
|
|
|
|
#ifdef CY_DEBUG_COUNT
|
|
|
|
|
printk("cyc:block_til_ready (%d): incrementing count to %d\n",
|
|
|
|
|
current->pid, info->count);
|
|
|
|
|
#endif
|
|
|
|
|
}
|
|
|
|
|
info->blocked_open--;
|
|
|
|
|
#ifdef CY_DEBUG_OPEN
|
|
|
|
|
printk("cyc:block_til_ready after blocking: ttyC%d, count = %d\n",
|
|
|
|
|
info->line, info->count);/**/
|
|
|
|
|
#endif
|
|
|
|
|
if (retval)
|
|
|
|
|
return retval;
|
|
|
|
|
info->flags |= ASYNC_NORMAL_ACTIVE;
|
|
|
|
|
return 0;
|
|
|
|
|
} /* block_til_ready */
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* This routine is called whenever a serial port is opened. It
|
|
|
|
|
* performs the serial-specific initialization for the tty structure.
|
|
|
|
|
*/
|
|
|
|
|
static int
|
|
|
|
|
cy_open(struct tty_struct *tty, struct file * filp)
|
|
|
|
|
{
|
|
|
|
|
struct cyclades_port *info;
|
|
|
|
|
int retval, line;
|
|
|
|
|
|
|
|
|
|
line = tty->index;
|
|
|
|
|
if ((line < 0) || (NR_PORTS <= line)){
|
|
|
|
|
return -ENODEV;
|
|
|
|
|
}
|
|
|
|
|
info = &cy_port[line];
|
|
|
|
|
if (info->line < 0){
|
|
|
|
|
return -ENODEV;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* If the card's firmware hasn't been loaded,
|
|
|
|
|
treat it as absent from the system. This
|
|
|
|
|
will make the user pay attention.
|
|
|
|
|
*/
|
|
|
|
|
if (IS_CYC_Z(cy_card[info->card])) {
|
|
|
|
|
struct cyclades_card *cinfo = &cy_card[info->card];
|
|
|
|
|
struct FIRM_ID __iomem *firm_id = cinfo->base_addr + ID_ADDRESS;
|
|
|
|
|
|
|
|
|
|
if (!ISZLOADED(*cinfo)) {
|
|
|
|
|
if (((ZE_V1 ==cy_readl(&((struct RUNTIME_9060 __iomem *)
|
|
|
|
|
(cinfo->ctl_addr))->mail_box_0)) &&
|
|
|
|
|
Z_FPGA_CHECK (*cinfo)) &&
|
|
|
|
|
(ZFIRM_HLT == cy_readl (&firm_id->signature)))
|
|
|
|
|
{
|
|
|
|
|
printk ("cyc:Cyclades-Z Error: you need an external power supply for this number of ports.\n\rFirmware halted.\r\n");
|
|
|
|
|
} else {
|
|
|
|
|
printk("cyc:Cyclades-Z firmware not yet loaded\n");
|
|
|
|
|
}
|
|
|
|
|
return -ENODEV;
|
|
|
|
|
}
|
|
|
|
|
#ifdef CONFIG_CYZ_INTR
|
|
|
|
|
else {
|
|
|
|
|
/* In case this Z board is operating in interrupt mode, its
|
|
|
|
|
interrupts should be enabled as soon as the first open happens
|
|
|
|
|
to one of its ports. */
|
|
|
|
|
if (!cinfo->intr_enabled) {
|
|
|
|
|
struct ZFW_CTRL __iomem *zfw_ctrl;
|
|
|
|
|
struct BOARD_CTRL __iomem *board_ctrl;
|
|
|
|
|
|
|
|
|
|
zfw_ctrl = cinfo->base_addr + (cy_readl (&firm_id->zfwctrl_addr) & 0xfffff);
|
|
|
|
|
|
|
|
|
|
board_ctrl = &zfw_ctrl->board_ctrl;
|
|
|
|
|
|
|
|
|
|
/* Enable interrupts on the PLX chip */
|
|
|
|
|
cy_writew(cinfo->ctl_addr+0x68,
|
|
|
|
|
cy_readw(cinfo->ctl_addr+0x68)|0x0900);
|
|
|
|
|
/* Enable interrupts on the FW */
|
|
|
|
|
retval = cyz_issue_cmd(cinfo,
|
|
|
|
|
0, C_CM_IRQ_ENBL, 0L);
|
|
|
|
|
if (retval != 0){
|
|
|
|
|
printk("cyc:IRQ enable retval was %x\n", retval);
|
|
|
|
|
}
|
|
|
|
|
cinfo->nports = (int) cy_readl (&board_ctrl->n_channel);
|
|
|
|
|
cinfo->intr_enabled = 1;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
#endif /* CONFIG_CYZ_INTR */
|
|
|
|
|
/* Make sure this Z port really exists in hardware */
|
|
|
|
|
if (info->line > (cinfo->first_line + cinfo->nports - 1))
|
|
|
|
|
return -ENODEV;
|
|
|
|
|
}
|
|
|
|
|
#ifdef CY_DEBUG_OTHER
|
|
|
|
|
printk("cyc:cy_open ttyC%d\n", info->line); /* */
|
|
|
|
|
#endif
|
|
|
|
|
tty->driver_data = info;
|
|
|
|
|
info->tty = tty;
|
|
|
|
|
if (serial_paranoia_check(info, tty->name, "cy_open")){
|
|
|
|
|
return -ENODEV;
|
|
|
|
|
}
|
|
|
|
|
#ifdef CY_DEBUG_OPEN
|
|
|
|
|
printk("cyc:cy_open ttyC%d, count = %d\n",
|
|
|
|
|
info->line, info->count);/**/
|
|
|
|
|
#endif
|
|
|
|
|
info->count++;
|
|
|
|
|
#ifdef CY_DEBUG_COUNT
|
|
|
|
|
printk("cyc:cy_open (%d): incrementing count to %d\n",
|
|
|
|
|
current->pid, info->count);
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* If the port is the middle of closing, bail out now
|
|
|
|
|
*/
|
|
|
|
|
if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
|
|
|
|
|
if (info->flags & ASYNC_CLOSING)
|
|
|
|
|
interruptible_sleep_on(&info->close_wait);
|
|
|
|
|
return ((info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN : -ERESTARTSYS);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Start up serial port
|
|
|
|
|
*/
|
|
|
|
|
retval = startup(info);
|
|
|
|
|
if (retval){
|
|
|
|
|
return retval;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
retval = block_til_ready(tty, filp, info);
|
|
|
|
|
if (retval) {
|
|
|
|
|
#ifdef CY_DEBUG_OPEN
|
|
|
|
|
printk("cyc:cy_open returning after block_til_ready with %d\n",
|
|
|
|
|
retval);
|
|
|
|
|
#endif
|
|
|
|
|
return retval;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
info->throttle = 0;
|
|
|
|
|
|
|
|
|
|
#ifdef CY_DEBUG_OPEN
|
|
|
|
|
printk(" cyc:cy_open done\n");/**/
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
} /* cy_open */
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* cy_wait_until_sent() --- wait until the transmitter is empty
|
|
|
|
|
*/
|
|
|
|
|
static void
|
|
|
|
|
cy_wait_until_sent(struct tty_struct *tty, int timeout)
|
|
|
|
|
{
|
|
|
|
|
struct cyclades_port * info = (struct cyclades_port *)tty->driver_data;
|
|
|
|
|
void __iomem *base_addr;
|
|
|
|
|
int card,chip,channel,index;
|
|
|
|
|
unsigned long orig_jiffies;
|
|
|
|
|
int char_time;
|
|
|
|
|
|
|
|
|
|
if (serial_paranoia_check(info, tty->name, "cy_wait_until_sent"))
|
|
|
|
|
return;
|
|
|
|
|
|
|
|
|
|
if (info->xmit_fifo_size == 0)
|
|
|
|
|
return; /* Just in case.... */
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
orig_jiffies = jiffies;
|
|
|
|
|
/*
|
|
|
|
|
* Set the check interval to be 1/5 of the estimated time to
|
|
|
|
|
* send a single character, and make it at least 1. The check
|
|
|
|
|
* interval should also be less than the timeout.
|
|
|
|
|
*
|
|
|
|
|
* Note: we have to use pretty tight timings here to satisfy
|
|
|
|
|
* the NIST-PCTS.
|
|
|
|
|
*/
|
|
|
|
|
char_time = (info->timeout - HZ/50) / info->xmit_fifo_size;
|
|
|
|
|
char_time = char_time / 5;
|
|
|
|
|
if (char_time <= 0)
|
|
|
|
|
char_time = 1;
|
|
|
|
|
if (timeout < 0)
|
|
|
|
|
timeout = 0;
|
|
|
|
|
if (timeout)
|
|
|
|
|
char_time = min(char_time, timeout);
|
|
|
|
|
/*
|
|
|
|
|
* If the transmitter hasn't cleared in twice the approximate
|
|
|
|
|
* amount of time to send the entire FIFO, it probably won't
|
|
|
|
|
* ever clear. This assumes the UART isn't doing flow
|
|
|
|
|
* control, which is currently the case. Hence, if it ever
|
|
|
|
|
* takes longer than info->timeout, this is probably due to a
|
|
|
|
|
* UART bug of some kind. So, we clamp the timeout parameter at
|
|
|
|
|
* 2*info->timeout.
|
|
|
|
|
*/
|
|
|
|
|
if (!timeout || timeout > 2*info->timeout)
|
|
|
|
|
timeout = 2*info->timeout;
|
|
|
|
|
#ifdef CY_DEBUG_WAIT_UNTIL_SENT
|
|
|
|
|
printk("In cy_wait_until_sent(%d) check=%lu...", timeout, char_time);
|
|
|
|
|
printk("jiff=%lu...", jiffies);
|
|
|
|
|
#endif
|
|
|
|
|
card = info->card;
|
|
|
|
|
channel = (info->line) - (cy_card[card].first_line);
|
|
|
|
|
if (!IS_CYC_Z(cy_card[card])) {
|
|
|
|
|
chip = channel>>2;
|
|
|
|
|
channel &= 0x03;
|
|
|
|
|
index = cy_card[card].bus_index;
|
|
|
|
|
base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
|
|
|
|
|
while (cy_readb(base_addr+(CySRER<<index)) & CyTxRdy) {
|
|
|
|
|
#ifdef CY_DEBUG_WAIT_UNTIL_SENT
|
|
|
|
|
printk("Not clean (jiff=%lu)...", jiffies);
|
|
|
|
|
#endif
|
|
|
|
|
if (msleep_interruptible(jiffies_to_msecs(char_time)))
|
|
|
|
|
break;
|
|
|
|
|
if (timeout && time_after(jiffies, orig_jiffies + timeout))
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
} else {
|
|
|
|
|
// Nothing to do!
|
|
|
|
|
}
|
|
|
|
|
/* Run one more char cycle */
|
|
|
|
|
msleep_interruptible(jiffies_to_msecs(char_time * 5));
|
|
|
|
|
#ifdef CY_DEBUG_WAIT_UNTIL_SENT
|
|
|
|
|
printk("Clean (jiff=%lu)...done\n", jiffies);
|
|
|
|
|
#endif
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* This routine is called when a particular tty device is closed.
|
|
|
|
|
*/
|
|
|
|
|
static void
|
|
|
|
|
cy_close(struct tty_struct *tty, struct file *filp)
|
|
|
|
|
{
|
|
|
|
|
struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
|
|
|
|
|
unsigned long flags;
|
|
|
|
|
|
|
|
|
|
#ifdef CY_DEBUG_OTHER
|
|
|
|
|
printk("cyc:cy_close ttyC%d\n", info->line);
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
if (!info || serial_paranoia_check(info, tty->name, "cy_close")){
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
CY_LOCK(info, flags);
|
|
|
|
|
/* If the TTY is being hung up, nothing to do */
|
|
|
|
|
if (tty_hung_up_p(filp)) {
|
|
|
|
|
CY_UNLOCK(info, flags);
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
#ifdef CY_DEBUG_OPEN
|
|
|
|
|
printk("cyc:cy_close ttyC%d, count = %d\n", info->line, info->count);
|
|
|
|
|
#endif
|
|
|
|
|
if ((tty->count == 1) && (info->count != 1)) {
|
|
|
|
|
/*
|
|
|
|
|
* Uh, oh. tty->count is 1, which means that the tty
|
|
|
|
|
* structure will be freed. Info->count should always
|
|
|
|
|
* be one in these conditions. If it's greater than
|
|
|
|
|
* one, we've got real problems, since it means the
|
|
|
|
|
* serial port won't be shutdown.
|
|
|
|
|
*/
|
|
|
|
|
printk("cyc:cy_close: bad serial port count; tty->count is 1, "
|
|
|
|
|
"info->count is %d\n", info->count);
|
|
|
|
|
info->count = 1;
|
|
|
|
|
}
|
|
|
|
|
#ifdef CY_DEBUG_COUNT
|
|
|
|
|
printk("cyc:cy_close at (%d): decrementing count to %d\n",
|
|
|
|
|
current->pid, info->count - 1);
|
|
|
|
|
#endif
|
|
|
|
|
if (--info->count < 0) {
|
|
|
|
|
#ifdef CY_DEBUG_COUNT
|
|
|
|
|
printk("cyc:cyc_close setting count to 0\n");
|
|
|
|
|
#endif
|
|
|
|
|
info->count = 0;
|
|
|
|
|
}
|
|
|
|
|
if (info->count) {
|
|
|
|
|
CY_UNLOCK(info, flags);
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
info->flags |= ASYNC_CLOSING;
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Now we wait for the transmit buffer to clear; and we notify
|
|
|
|
|
* the line discipline to only process XON/XOFF characters.
|
|
|
|
|
*/
|
|
|
|
|
tty->closing = 1;
|
|
|
|
|
CY_UNLOCK(info, flags);
|
|
|
|
|
if (info->closing_wait != CY_CLOSING_WAIT_NONE) {
|
|
|
|
|
tty_wait_until_sent(tty, info->closing_wait);
|
|
|
|
|
}
|
|
|
|
|
CY_LOCK(info, flags);
|
|
|
|
|
|
|
|
|
|
if (!IS_CYC_Z(cy_card[info->card])) {
|
|
|
|
|
int channel = info->line - cy_card[info->card].first_line;
|
|
|
|
|
int index = cy_card[info->card].bus_index;
|
|
|
|
|
void __iomem *base_addr = cy_card[info->card].base_addr + (cy_chip_offset[channel>>2] << index);
|
|
|
|
|
/* Stop accepting input */
|
|
|
|
|
channel &= 0x03;
|
|
|
|
|
cy_writeb(base_addr+(CyCAR<<index), (u_char)channel);
|
|
|
|
|
cy_writeb(base_addr+(CySRER<<index),
|
|
|
|
|
cy_readb(base_addr+(CySRER<<index)) & ~CyRxData);
|
|
|
|
|
if (info->flags & ASYNC_INITIALIZED) {
|
|
|
|
|
/* Waiting for on-board buffers to be empty before closing
|
|
|
|
|
the port */
|
|
|
|
|
CY_UNLOCK(info, flags);
|
|
|
|
|
cy_wait_until_sent(tty, info->timeout);
|
|
|
|
|
CY_LOCK(info, flags);
|
|
|
|
|
}
|
|
|
|
|
} else {
|
|
|
|
|
#ifdef Z_WAKE
|
|
|
|
|
/* Waiting for on-board buffers to be empty before closing the port */
|
|
|
|
|
void __iomem *base_addr = cy_card[info->card].base_addr;
|
|
|
|
|
struct FIRM_ID __iomem *firm_id = base_addr + ID_ADDRESS;
|
|
|
|
|
struct ZFW_CTRL __iomem *zfw_ctrl = base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
|
|
|
|
|
struct CH_CTRL __iomem *ch_ctrl = zfw_ctrl->ch_ctrl;
|
|
|
|
|
int channel = info->line - cy_card[info->card].first_line;
|
|
|
|
|
int retval;
|
|
|
|
|
|
|
|
|
|
if (cy_readl(&ch_ctrl[channel].flow_status) != C_FS_TXIDLE) {
|
|
|
|
|
retval = cyz_issue_cmd(&cy_card[info->card], channel,
|
|
|
|
|
C_CM_IOCTLW, 0L);
|
|
|
|
|
if (retval != 0){
|
|
|
|
|
printk("cyc:cy_close retval on ttyC%d was %x\n",
|
|
|
|
|
info->line, retval);
|
|
|
|
|
}
|
|
|
|
|
CY_UNLOCK(info, flags);
|
|
|
|
|
interruptible_sleep_on(&info->shutdown_wait);
|
|
|
|
|
CY_LOCK(info, flags);
|
|
|
|
|
}
|
|
|
|
|
#endif
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
CY_UNLOCK(info, flags);
|
|
|
|
|
shutdown(info);
|
|
|
|
|
if (tty->driver->flush_buffer)
|
|
|
|
|
tty->driver->flush_buffer(tty);
|
|
|
|
|
tty_ldisc_flush(tty);
|
|
|
|
|
CY_LOCK(info, flags);
|
|
|
|
|
|
|
|
|
|
tty->closing = 0;
|
|
|
|
|
info->event = 0;
|
|
|
|
|
info->tty = NULL;
|
|
|
|
|
if (info->blocked_open) {
|
|
|
|
|
CY_UNLOCK(info, flags);
|
|
|
|
|
if (info->close_delay) {
|
|
|
|
|
msleep_interruptible(jiffies_to_msecs(info->close_delay));
|
|
|
|
|
}
|
|
|
|
|
wake_up_interruptible(&info->open_wait);
|
|
|
|
|
CY_LOCK(info, flags);
|
|
|
|
|
}
|
|
|
|
|
info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
|
|
|
|
|
wake_up_interruptible(&info->close_wait);
|
|
|
|
|
|
|
|
|
|
#ifdef CY_DEBUG_OTHER
|
|
|
|
|
printk(" cyc:cy_close done\n");
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
CY_UNLOCK(info, flags);
|
|
|
|
|
return;
|
|
|
|
|
} /* cy_close */
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/* This routine gets called when tty_write has put something into
|
|
|
|
|
* the write_queue. The characters may come from user space or
|
|
|
|
|
* kernel space.
|
|
|
|
|
*
|
|
|
|
|
* This routine will return the number of characters actually
|
|
|
|
|
* accepted for writing.
|
|
|
|
|
*
|
|
|
|
|
* If the port is not already transmitting stuff, start it off by
|
|
|
|
|
* enabling interrupts. The interrupt service routine will then
|
|
|
|
|
* ensure that the characters are sent.
|
|
|
|
|
* If the port is already active, there is no need to kick it.
|
|
|
|
|
*
|
|
|
|
|
*/
|
|
|
|
|
static int
|
|
|
|
|
cy_write(struct tty_struct * tty, const unsigned char *buf, int count)
|
|
|
|
|
{
|
|
|
|
|
struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
|
|
|
|
|
unsigned long flags;
|
|
|
|
|
int c, ret = 0;
|
|
|
|
|
|
|
|
|
|
#ifdef CY_DEBUG_IO
|
|
|
|
|
printk("cyc:cy_write ttyC%d\n", info->line); /* */
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
if (serial_paranoia_check(info, tty->name, "cy_write")){
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
2006-10-04 09:15:27 +00:00
|
|
|
if (!info->xmit_buf)
|
2006-06-25 12:48:45 +00:00
|
|
|
return 0;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
|
CY_LOCK(info, flags);
|
|
|
|
|
while (1) {
|
|
|
|
|
c = min(count, min((int)(SERIAL_XMIT_SIZE - info->xmit_cnt - 1),
|
|
|
|
|
(int)(SERIAL_XMIT_SIZE - info->xmit_head)));
|
|
|
|
|
|
|
|
|
|
if (c <= 0)
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
memcpy(info->xmit_buf + info->xmit_head, buf, c);
|
|
|
|
|
info->xmit_head = (info->xmit_head + c) & (SERIAL_XMIT_SIZE-1);
|
|
|
|
|
info->xmit_cnt += c;
|
|
|
|
|
buf += c;
|
|
|
|
|
count -= c;
|
|
|
|
|
ret += c;
|
|
|
|
|
}
|
|
|
|
|
CY_UNLOCK(info, flags);
|
|
|
|
|
|
|
|
|
|
info->idle_stats.xmit_bytes += ret;
|
|
|
|
|
info->idle_stats.xmit_idle = jiffies;
|
|
|
|
|
|
|
|
|
|
if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped) {
|
|
|
|
|
start_xmit(info);
|
|
|
|
|
}
|
|
|
|
|
return ret;
|
|
|
|
|
} /* cy_write */
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* This routine is called by the kernel to write a single
|
|
|
|
|
* character to the tty device. If the kernel uses this routine,
|
|
|
|
|
* it must call the flush_chars() routine (if defined) when it is
|
|
|
|
|
* done stuffing characters into the driver. If there is no room
|
|
|
|
|
* in the queue, the character is ignored.
|
|
|
|
|
*/
|
|
|
|
|
static void
|
|
|
|
|
cy_put_char(struct tty_struct *tty, unsigned char ch)
|
|
|
|
|
{
|
|
|
|
|
struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
|
|
|
|
|
unsigned long flags;
|
|
|
|
|
|
|
|
|
|
#ifdef CY_DEBUG_IO
|
|
|
|
|
printk("cyc:cy_put_char ttyC%d\n", info->line);
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
if (serial_paranoia_check(info, tty->name, "cy_put_char"))
|
|
|
|
|
return;
|
|
|
|
|
|
2006-06-25 12:48:45 +00:00
|
|
|
if (!info->xmit_buf)
|
2005-04-16 22:20:36 +00:00
|
|
|
return;
|
|
|
|
|
|
|
|
|
|
CY_LOCK(info, flags);
|
|
|
|
|
if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1) {
|
|
|
|
|
CY_UNLOCK(info, flags);
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
info->xmit_buf[info->xmit_head++] = ch;
|
|
|
|
|
info->xmit_head &= SERIAL_XMIT_SIZE - 1;
|
|
|
|
|
info->xmit_cnt++;
|
|
|
|
|
info->idle_stats.xmit_bytes++;
|
|
|
|
|
info->idle_stats.xmit_idle = jiffies;
|
|
|
|
|
CY_UNLOCK(info, flags);
|
|
|
|
|
} /* cy_put_char */
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* This routine is called by the kernel after it has written a
|
|
|
|
|
* series of characters to the tty device using put_char().
|
|
|
|
|
*/
|
|
|
|
|
static void
|
|
|
|
|
cy_flush_chars(struct tty_struct *tty)
|
|
|
|
|
{
|
|
|
|
|
struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
|
|
|
|
|
|
|
|
|
|
#ifdef CY_DEBUG_IO
|
|
|
|
|
printk("cyc:cy_flush_chars ttyC%d\n", info->line); /* */
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
if (serial_paranoia_check(info, tty->name, "cy_flush_chars"))
|
|
|
|
|
return;
|
|
|
|
|
|
|
|
|
|
if (info->xmit_cnt <= 0 || tty->stopped
|
|
|
|
|
|| tty->hw_stopped || !info->xmit_buf)
|
|
|
|
|
return;
|
|
|
|
|
|
|
|
|
|
start_xmit(info);
|
|
|
|
|
} /* cy_flush_chars */
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* This routine returns the numbers of characters the tty driver
|
|
|
|
|
* will accept for queuing to be written. This number is subject
|
|
|
|
|
* to change as output buffers get emptied, or if the output flow
|
|
|
|
|
* control is activated.
|
|
|
|
|
*/
|
|
|
|
|
static int
|
|
|
|
|
cy_write_room(struct tty_struct *tty)
|
|
|
|
|
{
|
|
|
|
|
struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
|
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
|
|
#ifdef CY_DEBUG_IO
|
|
|
|
|
printk("cyc:cy_write_room ttyC%d\n", info->line); /* */
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
if (serial_paranoia_check(info, tty->name, "cy_write_room"))
|
|
|
|
|
return 0;
|
|
|
|
|
ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
|
|
|
|
|
if (ret < 0)
|
|
|
|
|
ret = 0;
|
|
|
|
|
return ret;
|
|
|
|
|
} /* cy_write_room */
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
static int
|
|
|
|
|
cy_chars_in_buffer(struct tty_struct *tty)
|
|
|
|
|
{
|
|
|
|
|
struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
|
|
|
|
|
int card, channel;
|
|
|
|
|
|
|
|
|
|
if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer"))
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
|
|
card = info->card;
|
|
|
|
|
channel = (info->line) - (cy_card[card].first_line);
|
|
|
|
|
|
|
|
|
|
#ifdef Z_EXT_CHARS_IN_BUFFER
|
|
|
|
|
if (!IS_CYC_Z(cy_card[card])) {
|
|
|
|
|
#endif /* Z_EXT_CHARS_IN_BUFFER */
|
|
|
|
|
#ifdef CY_DEBUG_IO
|
|
|
|
|
printk("cyc:cy_chars_in_buffer ttyC%d %d\n",
|
|
|
|
|
info->line, info->xmit_cnt); /* */
|
|
|
|
|
#endif
|
|
|
|
|
return info->xmit_cnt;
|
|
|
|
|
#ifdef Z_EXT_CHARS_IN_BUFFER
|
|
|
|
|
} else {
|
|
|
|
|
static volatile struct FIRM_ID *firm_id;
|
|
|
|
|
static volatile struct ZFW_CTRL *zfw_ctrl;
|
|
|
|
|
static volatile struct CH_CTRL *ch_ctrl;
|
|
|
|
|
static volatile struct BUF_CTRL *buf_ctrl;
|
|
|
|
|
int char_count;
|
|
|
|
|
volatile uclong tx_put, tx_get, tx_bufsize;
|
|
|
|
|
|
|
|
|
|
firm_id = cy_card[card].base_addr + ID_ADDRESS;
|
|
|
|
|
zfw_ctrl = cy_card[card].base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
|
|
|
|
|
ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
|
|
|
|
|
buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
|
|
|
|
|
|
|
|
|
|
tx_get = cy_readl(&buf_ctrl->tx_get);
|
|
|
|
|
tx_put = cy_readl(&buf_ctrl->tx_put);
|
|
|
|
|
tx_bufsize = cy_readl(&buf_ctrl->tx_bufsize);
|
|
|
|
|
if (tx_put >= tx_get)
|
|
|
|
|
char_count = tx_put - tx_get;
|
|
|
|
|
else
|
|
|
|
|
char_count = tx_put - tx_get + tx_bufsize;
|
|
|
|
|
#ifdef CY_DEBUG_IO
|
|
|
|
|
printk("cyc:cy_chars_in_buffer ttyC%d %d\n",
|
|
|
|
|
info->line, info->xmit_cnt + char_count); /* */
|
|
|
|
|
#endif
|
|
|
|
|
return (info->xmit_cnt + char_count);
|
|
|
|
|
}
|
|
|
|
|
#endif /* Z_EXT_CHARS_IN_BUFFER */
|
|
|
|
|
} /* cy_chars_in_buffer */
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* ------------------------------------------------------------
|
|
|
|
|
* cy_ioctl() and friends
|
|
|
|
|
* ------------------------------------------------------------
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
|
cyy_baud_calc(struct cyclades_port *info, uclong baud)
|
|
|
|
|
{
|
|
|
|
|
int co, co_val, bpr;
|
|
|
|
|
uclong cy_clock = ((info->chip_rev >= CD1400_REV_J) ? 60000000 : 25000000);
|
|
|
|
|
|
|
|
|
|
if (baud == 0) {
|
|
|
|
|
info->tbpr = info->tco = info->rbpr = info->rco = 0;
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* determine which prescaler to use */
|
|
|
|
|
for (co = 4, co_val = 2048; co; co--, co_val >>= 2) {
|
|
|
|
|
if (cy_clock / co_val / baud > 63)
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
bpr = (cy_clock / co_val * 2 / baud + 1) / 2;
|
|
|
|
|
if (bpr > 255)
|
|
|
|
|
bpr = 255;
|
|
|
|
|
|
|
|
|
|
info->tbpr = info->rbpr = bpr;
|
|
|
|
|
info->tco = info->rco = co;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* This routine finds or computes the various line characteristics.
|
|
|
|
|
* It used to be called config_setup
|
|
|
|
|
*/
|
|
|
|
|
static void
|
|
|
|
|
set_line_char(struct cyclades_port * info)
|
|
|
|
|
{
|
|
|
|
|
unsigned long flags;
|
|
|
|
|
void __iomem *base_addr;
|
|
|
|
|
int card,chip,channel,index;
|
|
|
|
|
unsigned cflag, iflag;
|
|
|
|
|
unsigned short chip_number;
|
|
|
|
|
int baud, baud_rate = 0;
|
|
|
|
|
int i;
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
if (!info->tty || !info->tty->termios){
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
if (info->line == -1){
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
cflag = info->tty->termios->c_cflag;
|
|
|
|
|
iflag = info->tty->termios->c_iflag;
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Set up the tty->alt_speed kludge
|
|
|
|
|
*/
|
|
|
|
|
if (info->tty) {
|
|
|
|
|
if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
|
|
|
|
|
info->tty->alt_speed = 57600;
|
|
|
|
|
if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
|
|
|
|
|
info->tty->alt_speed = 115200;
|
|
|
|
|
if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
|
|
|
|
|
info->tty->alt_speed = 230400;
|
|
|
|
|
if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
|
|
|
|
|
info->tty->alt_speed = 460800;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
card = info->card;
|
|
|
|
|
channel = (info->line) - (cy_card[card].first_line);
|
|
|
|
|
chip_number = channel / 4;
|
|
|
|
|
|
|
|
|
|
if (!IS_CYC_Z(cy_card[card])) {
|
|
|
|
|
|
|
|
|
|
index = cy_card[card].bus_index;
|
|
|
|
|
|
|
|
|
|
/* baud rate */
|
|
|
|
|
baud = tty_get_baud_rate(info->tty);
|
|
|
|
|
if ((baud == 38400) &&
|
|
|
|
|
((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)) {
|
|
|
|
|
if (info->custom_divisor)
|
|
|
|
|
baud_rate = info->baud / info->custom_divisor;
|
|
|
|
|
else
|
|
|
|
|
baud_rate = info->baud;
|
|
|
|
|
} else if (baud > CD1400_MAX_SPEED) {
|
|
|
|
|
baud = CD1400_MAX_SPEED;
|
|
|
|
|
}
|
|
|
|
|
/* find the baud index */
|
|
|
|
|
for (i = 0; i < 20; i++) {
|
|
|
|
|
if (baud == baud_table[i]) {
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
if (i == 20) {
|
|
|
|
|
i = 19; /* CD1400_MAX_SPEED */
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if ((baud == 38400) &&
|
|
|
|
|
((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)) {
|
|
|
|
|
cyy_baud_calc(info, baud_rate);
|
|
|
|
|
} else {
|
|
|
|
|
if(info->chip_rev >= CD1400_REV_J) {
|
|
|
|
|
/* It is a CD1400 rev. J or later */
|
|
|
|
|
info->tbpr = baud_bpr_60[i]; /* Tx BPR */
|
|
|
|
|
info->tco = baud_co_60[i]; /* Tx CO */
|
|
|
|
|
info->rbpr = baud_bpr_60[i]; /* Rx BPR */
|
|
|
|
|
info->rco = baud_co_60[i]; /* Rx CO */
|
|
|
|
|
} else {
|
|
|
|
|
info->tbpr = baud_bpr_25[i]; /* Tx BPR */
|
|
|
|
|
info->tco = baud_co_25[i]; /* Tx CO */
|
|
|
|
|
info->rbpr = baud_bpr_25[i]; /* Rx BPR */
|
|
|
|
|
info->rco = baud_co_25[i]; /* Rx CO */
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
if (baud_table[i] == 134) {
|
|
|
|
|
/* get it right for 134.5 baud */
|
|
|
|
|
info->timeout = (info->xmit_fifo_size*HZ*30/269) + 2;
|
|
|
|
|
} else if ((baud == 38400) &&
|
|
|
|
|
((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)) {
|
|
|
|
|
info->timeout = (info->xmit_fifo_size*HZ*15/baud_rate) + 2;
|
|
|
|
|
} else if (baud_table[i]) {
|
|
|
|
|
info->timeout = (info->xmit_fifo_size*HZ*15/baud_table[i]) + 2;
|
|
|
|
|
/* this needs to be propagated into the card info */
|
|
|
|
|
} else {
|
|
|
|
|
info->timeout = 0;
|
|
|
|
|
}
|
|
|
|
|
/* By tradition (is it a standard?) a baud rate of zero
|
|
|
|
|
implies the line should be/has been closed. A bit
|
|
|
|
|
later in this routine such a test is performed. */
|
|
|
|
|
|
|
|
|
|
/* byte size and parity */
|
|
|
|
|
info->cor5 = 0;
|
|
|
|
|
info->cor4 = 0;
|
|
|
|
|
info->cor3 = (info->default_threshold
|
|
|
|
|
? info->default_threshold
|
|
|
|
|
: baud_cor3[i]); /* receive threshold */
|
|
|
|
|
info->cor2 = CyETC;
|
|
|
|
|
switch(cflag & CSIZE){
|
|
|
|
|
case CS5:
|
|
|
|
|
info->cor1 = Cy_5_BITS;
|
|
|
|
|
break;
|
|
|
|
|
case CS6:
|
|
|
|
|
info->cor1 = Cy_6_BITS;
|
|
|
|
|
break;
|
|
|
|
|
case CS7:
|
|
|
|
|
info->cor1 = Cy_7_BITS;
|
|
|
|
|
break;
|
|
|
|
|
case CS8:
|
|
|
|
|
info->cor1 = Cy_8_BITS;
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
if(cflag & CSTOPB){
|
|
|
|
|
info->cor1 |= Cy_2_STOP;
|
|
|
|
|
}
|
|
|
|
|
if (cflag & PARENB){
|
|
|
|
|
if (cflag & PARODD){
|
|
|
|
|
info->cor1 |= CyPARITY_O;
|
|
|
|
|
}else{
|
|
|
|
|
info->cor1 |= CyPARITY_E;
|
|
|
|
|
}
|
|
|
|
|
}else{
|
|
|
|
|
info->cor1 |= CyPARITY_NONE;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* CTS flow control flag */
|
|
|
|
|
if (cflag & CRTSCTS){
|
|
|
|
|
info->flags |= ASYNC_CTS_FLOW;
|
|
|
|
|
info->cor2 |= CyCtsAE;
|
|
|
|
|
}else{
|
|
|
|
|
info->flags &= ~ASYNC_CTS_FLOW;
|
|
|
|
|
info->cor2 &= ~CyCtsAE;
|
|
|
|
|
}
|
|
|
|
|
if (cflag & CLOCAL)
|
|
|
|
|
info->flags &= ~ASYNC_CHECK_CD;
|
|
|
|
|
else
|
|
|
|
|
info->flags |= ASYNC_CHECK_CD;
|
|
|
|
|
|
|
|
|
|
/***********************************************
|
|
|
|
|
The hardware option, CyRtsAO, presents RTS when
|
|
|
|
|
the chip has characters to send. Since most modems
|
|
|
|
|
use RTS as reverse (inbound) flow control, this
|
|
|
|
|
option is not used. If inbound flow control is
|
|
|
|
|
necessary, DTR can be programmed to provide the
|
|
|
|
|
appropriate signals for use with a non-standard
|
|
|
|
|
cable. Contact Marcio Saito for details.
|
|
|
|
|
***********************************************/
|
|
|
|
|
|
|
|
|
|
chip = channel>>2;
|
|
|
|
|
channel &= 0x03;
|
|
|
|
|
base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
|
|
|
|
|
|
|
|
|
|
CY_LOCK(info, flags);
|
|
|
|
|
cy_writeb(base_addr+(CyCAR<<index), (u_char)channel);
|
|
|
|
|
|
|
|
|
|
/* tx and rx baud rate */
|
|
|
|
|
|
|
|
|
|
cy_writeb(base_addr+(CyTCOR<<index), info->tco);
|
|
|
|
|
cy_writeb(base_addr+(CyTBPR<<index), info->tbpr);
|
|
|
|
|
cy_writeb(base_addr+(CyRCOR<<index), info->rco);
|
|
|
|
|
cy_writeb(base_addr+(CyRBPR<<index), info->rbpr);
|
|
|
|
|
|
|
|
|
|
/* set line characteristics according configuration */
|
|
|
|
|
|
|
|
|
|
cy_writeb(base_addr+(CySCHR1<<index),
|
|
|
|
|
START_CHAR(info->tty));
|
|
|
|
|
cy_writeb(base_addr+(CySCHR2<<index),
|
|
|
|
|
STOP_CHAR(info->tty));
|
|
|
|
|
cy_writeb(base_addr+(CyCOR1<<index), info->cor1);
|
|
|
|
|
cy_writeb(base_addr+(CyCOR2<<index), info->cor2);
|
|
|
|
|
cy_writeb(base_addr+(CyCOR3<<index), info->cor3);
|
|
|
|
|
cy_writeb(base_addr+(CyCOR4<<index), info->cor4);
|
|
|
|
|
cy_writeb(base_addr+(CyCOR5<<index), info->cor5);
|
|
|
|
|
|
|
|
|
|
cyy_issue_cmd(base_addr,
|
|
|
|
|
CyCOR_CHANGE|CyCOR1ch|CyCOR2ch|CyCOR3ch,index);
|
|
|
|
|
|
|
|
|
|
cy_writeb(base_addr+(CyCAR<<index),
|
|
|
|
|
(u_char)channel); /* !!! Is this needed? */
|
|
|
|
|
cy_writeb(base_addr+(CyRTPR<<index), (info->default_timeout
|
|
|
|
|
? info->default_timeout
|
|
|
|
|
: 0x02)); /* 10ms rx timeout */
|
|
|
|
|
|
|
|
|
|
if (C_CLOCAL(info->tty)) {
|
|
|
|
|
/* without modem intr */
|
|
|
|
|
cy_writeb(base_addr+(CySRER<<index),
|
|
|
|
|
cy_readb(base_addr+(CySRER<<index)) | CyMdmCh);
|
|
|
|
|
/* act on 1->0 modem transitions */
|
|
|
|
|
if ((cflag & CRTSCTS) && info->rflow) {
|
|
|
|
|
cy_writeb(base_addr+(CyMCOR1<<index),
|
|
|
|
|
(CyCTS|rflow_thr[i]));
|
|
|
|
|
} else {
|
|
|
|
|
cy_writeb(base_addr+(CyMCOR1<<index), CyCTS);
|
|
|
|
|
}
|
|
|
|
|
/* act on 0->1 modem transitions */
|
|
|
|
|
cy_writeb(base_addr+(CyMCOR2<<index), CyCTS);
|
|
|
|
|
} else {
|
|
|
|
|
/* without modem intr */
|
|
|
|
|
cy_writeb(base_addr+(CySRER<<index),
|
|
|
|
|
cy_readb(base_addr+(CySRER<<index)) | CyMdmCh);
|
|
|
|
|
/* act on 1->0 modem transitions */
|
|
|
|
|
if ((cflag & CRTSCTS) && info->rflow) {
|
|
|
|
|
cy_writeb(base_addr+(CyMCOR1<<index),
|
|
|
|
|
(CyDSR|CyCTS|CyRI|CyDCD|rflow_thr[i]));
|
|
|
|
|
} else {
|
|
|
|
|
cy_writeb(base_addr+(CyMCOR1<<index),
|
|
|
|
|
CyDSR|CyCTS|CyRI|CyDCD);
|
|
|
|
|
}
|
|
|
|
|
/* act on 0->1 modem transitions */
|
|
|
|
|
cy_writeb(base_addr+(CyMCOR2<<index),
|
|
|
|
|
CyDSR|CyCTS|CyRI|CyDCD);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if(i == 0){ /* baud rate is zero, turn off line */
|
|
|
|
|
if (info->rtsdtr_inv) {
|
|
|
|
|
cy_writeb(base_addr+(CyMSVR1<<index), ~CyRTS);
|
|
|
|
|
} else {
|
|
|
|
|
cy_writeb(base_addr+(CyMSVR2<<index), ~CyDTR);
|
|
|
|
|
}
|
|
|
|
|
#ifdef CY_DEBUG_DTR
|
|
|
|
|
printk("cyc:set_line_char dropping DTR\n");
|
|
|
|
|
printk(" status: 0x%x, 0x%x\n",
|
|
|
|
|
cy_readb(base_addr+(CyMSVR1<<index)),
|
|
|
|
|
cy_readb(base_addr+(CyMSVR2<<index)));
|
|
|
|
|
#endif
|
|
|
|
|
}else{
|
|
|
|
|
if (info->rtsdtr_inv) {
|
|
|
|
|
cy_writeb(base_addr+(CyMSVR1<<index), CyRTS);
|
|
|
|
|
} else {
|
|
|
|
|
cy_writeb(base_addr+(CyMSVR2<<index), CyDTR);
|
|
|
|
|
}
|
|
|
|
|
#ifdef CY_DEBUG_DTR
|
|
|
|
|
printk("cyc:set_line_char raising DTR\n");
|
|
|
|
|
printk(" status: 0x%x, 0x%x\n",
|
|
|
|
|
cy_readb(base_addr+(CyMSVR1<<index)),
|
|
|
|
|
cy_readb(base_addr+(CyMSVR2<<index)));
|
|
|
|
|
#endif
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (info->tty){
|
|
|
|
|
clear_bit(TTY_IO_ERROR, &info->tty->flags);
|
|
|
|
|
}
|
|
|
|
|
CY_UNLOCK(info, flags);
|
|
|
|
|
|
|
|
|
|
} else {
|
|
|
|
|
struct FIRM_ID __iomem *firm_id;
|
|
|
|
|
struct ZFW_CTRL __iomem *zfw_ctrl;
|
|
|
|
|
struct BOARD_CTRL __iomem *board_ctrl;
|
|
|
|
|
struct CH_CTRL __iomem *ch_ctrl;
|
|
|
|
|
struct BUF_CTRL __iomem *buf_ctrl;
|
|
|
|
|
uclong sw_flow;
|
|
|
|
|
int retval;
|
|
|
|
|
|
|
|
|
|
firm_id = cy_card[card].base_addr + ID_ADDRESS;
|
|
|
|
|
if (!ISZLOADED(cy_card[card])) {
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
zfw_ctrl = cy_card[card].base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
|
|
|
|
|
board_ctrl = &zfw_ctrl->board_ctrl;
|
|
|
|
|
ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
|
|
|
|
|
buf_ctrl = &zfw_ctrl->buf_ctrl[channel];
|
|
|
|
|
|
|
|
|
|
/* baud rate */
|
|
|
|
|
baud = tty_get_baud_rate(info->tty);
|
|
|
|
|
if ((baud == 38400) &&
|
|
|
|
|
((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)) {
|
|
|
|
|
if (info->custom_divisor)
|
|
|
|
|
baud_rate = info->baud / info->custom_divisor;
|
|
|
|
|
else
|
|
|
|
|
baud_rate = info->baud;
|
|
|
|
|
} else if (baud > CYZ_MAX_SPEED) {
|
|
|
|
|
baud = CYZ_MAX_SPEED;
|
|
|
|
|
}
|
|
|
|
|
cy_writel(&ch_ctrl->comm_baud , baud);
|
|
|
|
|
|
|
|
|
|
if (baud == 134) {
|
|
|
|
|
/* get it right for 134.5 baud */
|
|
|
|
|
info->timeout = (info->xmit_fifo_size*HZ*30/269) + 2;
|
|
|
|
|
} else if ((baud == 38400) &&
|
|
|
|
|
((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)) {
|
|
|
|
|
info->timeout = (info->xmit_fifo_size*HZ*15/baud_rate) + 2;
|
|
|
|
|
} else if (baud) {
|
|
|
|
|
info->timeout = (info->xmit_fifo_size*HZ*15/baud) + 2;
|
|
|
|
|
/* this needs to be propagated into the card info */
|
|
|
|
|
} else {
|
|
|
|
|
info->timeout = 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* byte size and parity */
|
|
|
|
|
switch(cflag & CSIZE){
|
|
|
|
|
case CS5: cy_writel(&ch_ctrl->comm_data_l , C_DL_CS5); break;
|
|
|
|
|
case CS6: cy_writel(&ch_ctrl->comm_data_l , C_DL_CS6); break;
|
|
|
|
|
case CS7: cy_writel(&ch_ctrl->comm_data_l , C_DL_CS7); break;
|
|
|
|
|
case CS8: cy_writel(&ch_ctrl->comm_data_l , C_DL_CS8); break;
|
|
|
|
|
}
|
|
|
|
|
if(cflag & CSTOPB){
|
|
|
|
|
cy_writel(&ch_ctrl->comm_data_l,
|
|
|
|
|
cy_readl(&ch_ctrl->comm_data_l) | C_DL_2STOP);
|
|
|
|
|
}else{
|
|
|
|
|
cy_writel(&ch_ctrl->comm_data_l,
|
|
|
|
|
cy_readl(&ch_ctrl->comm_data_l) | C_DL_1STOP);
|
|
|
|
|
}
|
|
|
|
|
if (cflag & PARENB){
|
|
|
|
|
if (cflag & PARODD){
|
|
|
|
|
cy_writel(&ch_ctrl->comm_parity , C_PR_ODD);
|
|
|
|
|
}else{
|
|
|
|
|
cy_writel(&ch_ctrl->comm_parity , C_PR_EVEN);
|
|
|
|
|
}
|
|
|
|
|
}else{
|
|
|
|
|
cy_writel(&ch_ctrl->comm_parity , C_PR_NONE);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* CTS flow control flag */
|
|
|
|
|
if (cflag & CRTSCTS){
|
|
|
|
|
cy_writel(&ch_ctrl->hw_flow,
|
|
|
|
|
cy_readl(&ch_ctrl->hw_flow) | C_RS_CTS | C_RS_RTS);
|
|
|
|
|
}else{
|
|
|
|
|
cy_writel(&ch_ctrl->hw_flow,
|
|
|
|
|
cy_readl(&ch_ctrl->hw_flow) & ~(C_RS_CTS | C_RS_RTS));
|
|
|
|
|
}
|
|
|
|
|
/* As the HW flow control is done in firmware, the driver doesn't
|
|
|
|
|
need to care about it */
|
|
|
|
|
info->flags &= ~ASYNC_CTS_FLOW;
|
|
|
|
|
|
|
|
|
|
/* XON/XOFF/XANY flow control flags */
|
|
|
|
|
sw_flow = 0;
|
|
|
|
|
if (iflag & IXON){
|
|
|
|
|
sw_flow |= C_FL_OXX;
|
|
|
|
|
if (iflag & IXANY)
|
|
|
|
|
sw_flow |= C_FL_OIXANY;
|
|
|
|
|
}
|
|
|
|
|
cy_writel(&ch_ctrl->sw_flow, sw_flow);
|
|
|
|
|
|
|
|
|
|
retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_IOCTL, 0L);
|
|
|
|
|
if (retval != 0){
|
|
|
|
|
printk("cyc:set_line_char retval on ttyC%d was %x\n",
|
|
|
|
|
info->line, retval);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* CD sensitivity */
|
|
|
|
|
if (cflag & CLOCAL){
|
|
|
|
|
info->flags &= ~ASYNC_CHECK_CD;
|
|
|
|
|
}else{
|
|
|
|
|
info->flags |= ASYNC_CHECK_CD;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if(baud == 0){ /* baud rate is zero, turn off line */
|
|
|
|
|
cy_writel(&ch_ctrl->rs_control,
|
|
|
|
|
cy_readl(&ch_ctrl->rs_control) & ~C_RS_DTR);
|
|
|
|
|
#ifdef CY_DEBUG_DTR
|
|
|
|
|
printk("cyc:set_line_char dropping Z DTR\n");
|
|
|
|
|
#endif
|
|
|
|
|
}else{
|
|
|
|
|
cy_writel(&ch_ctrl->rs_control,
|
|
|
|
|
cy_readl(&ch_ctrl->rs_control) | C_RS_DTR);
|
|
|
|
|
#ifdef CY_DEBUG_DTR
|
|
|
|
|
printk("cyc:set_line_char raising Z DTR\n");
|
|
|
|
|
#endif
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
retval = cyz_issue_cmd( &cy_card[card], channel, C_CM_IOCTLM, 0L);
|
|
|
|
|
if (retval != 0){
|
|
|
|
|
printk("cyc:set_line_char(2) retval on ttyC%d was %x\n",
|
|
|
|
|
info->line, retval);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (info->tty){
|
|
|
|
|
clear_bit(TTY_IO_ERROR, &info->tty->flags);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
} /* set_line_char */
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
static int
|
|
|
|
|
get_serial_info(struct cyclades_port * info,
|
|
|
|
|
struct serial_struct __user * retinfo)
|
|
|
|
|
{
|
|
|
|
|
struct serial_struct tmp;
|
|
|
|
|
struct cyclades_card *cinfo = &cy_card[info->card];
|
|
|
|
|
|
|
|
|
|
if (!retinfo)
|
|
|
|
|
return -EFAULT;
|
|
|
|
|
memset(&tmp, 0, sizeof(tmp));
|
|
|
|
|
tmp.type = info->type;
|
|
|
|
|
tmp.line = info->line;
|
|
|
|
|
tmp.port = info->card * 0x100 + info->line - cinfo->first_line;
|
|
|
|
|
tmp.irq = cinfo->irq;
|
|
|
|
|
tmp.flags = info->flags;
|
|
|
|
|
tmp.close_delay = info->close_delay;
|
|
|
|
|
tmp.baud_base = info->baud;
|
|
|
|
|
tmp.custom_divisor = info->custom_divisor;
|
|
|
|
|
tmp.hub6 = 0; /*!!!*/
|
|
|
|
|
return copy_to_user(retinfo,&tmp,sizeof(*retinfo))?-EFAULT:0;
|
|
|
|
|
} /* get_serial_info */
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
static int
|
|
|
|
|
set_serial_info(struct cyclades_port * info,
|
|
|
|
|
struct serial_struct __user * new_info)
|
|
|
|
|
{
|
|
|
|
|
struct serial_struct new_serial;
|
|
|
|
|
struct cyclades_port old_info;
|
|
|
|
|
|
|
|
|
|
if (copy_from_user(&new_serial,new_info,sizeof(new_serial)))
|
|
|
|
|
return -EFAULT;
|
|
|
|
|
old_info = *info;
|
|
|
|
|
|
|
|
|
|
if (!capable(CAP_SYS_ADMIN)) {
|
|
|
|
|
if ((new_serial.close_delay != info->close_delay) ||
|
|
|
|
|
(new_serial.baud_base != info->baud) ||
|
|
|
|
|
((new_serial.flags & ASYNC_FLAGS & ~ASYNC_USR_MASK) !=
|
|
|
|
|
(info->flags & ASYNC_FLAGS & ~ASYNC_USR_MASK)))
|
|
|
|
|
return -EPERM;
|
|
|
|
|
info->flags = ((info->flags & ~ASYNC_USR_MASK) |
|
|
|
|
|
(new_serial.flags & ASYNC_USR_MASK));
|
|
|
|
|
info->baud = new_serial.baud_base;
|
|
|
|
|
info->custom_divisor = new_serial.custom_divisor;
|
|
|
|
|
goto check_and_exit;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* OK, past this point, all the error checking has been done.
|
|
|
|
|
* At this point, we start making changes.....
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
info->baud = new_serial.baud_base;
|
|
|
|
|
info->custom_divisor = new_serial.custom_divisor;
|
|
|
|
|
info->flags = ((info->flags & ~ASYNC_FLAGS) |
|
|
|
|
|
(new_serial.flags & ASYNC_FLAGS));
|
|
|
|
|
info->close_delay = new_serial.close_delay * HZ/100;
|
|
|
|
|
info->closing_wait = new_serial.closing_wait * HZ/100;
|
|
|
|
|
|
|
|
|
|
check_and_exit:
|
|
|
|
|
if (info->flags & ASYNC_INITIALIZED){
|
|
|
|
|
set_line_char(info);
|
|
|
|
|
return 0;
|
|
|
|
|
}else{
|
|
|
|
|
return startup(info);
|
|
|
|
|
}
|
|
|
|
|
} /* set_serial_info */
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* get_lsr_info - get line status register info
|
|
|
|
|
*
|
|
|
|
|
* Purpose: Let user call ioctl() to get info when the UART physically
|
|
|
|
|
* is emptied. On bus types like RS485, the transmitter must
|
|
|
|
|
* release the bus after transmitting. This must be done when
|
|
|
|
|
* the transmit shift register is empty, not be done when the
|
|
|
|
|
* transmit holding register is empty. This functionality
|
|
|
|
|
* allows an RS485 driver to be written in user space.
|
|
|
|
|
*/
|
|
|
|
|
static int get_lsr_info(struct cyclades_port *info, unsigned int __user *value)
|
|
|
|
|
{
|
|
|
|
|
int card, chip, channel, index;
|
|
|
|
|
unsigned char status;
|
|
|
|
|
unsigned int result;
|
|
|
|
|
unsigned long flags;
|
|
|
|
|
void __iomem *base_addr;
|
|
|
|
|
|
|
|
|
|
card = info->card;
|
|
|
|
|
channel = (info->line) - (cy_card[card].first_line);
|
|
|
|
|
if (!IS_CYC_Z(cy_card[card])) {
|
|
|
|
|
chip = channel>>2;
|
|
|
|
|
channel &= 0x03;
|
|
|
|
|
index = cy_card[card].bus_index;
|
|
|
|
|
base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
|
|
|
|
|
|
|
|
|
|
CY_LOCK(info, flags);
|
|
|
|
|
status = cy_readb(base_addr+(CySRER<<index)) & (CyTxRdy|CyTxMpty);
|
|
|
|
|
CY_UNLOCK(info, flags);
|
|
|
|
|
result = (status ? 0 : TIOCSER_TEMT);
|
|
|
|
|
} else {
|
|
|
|
|
/* Not supported yet */
|
|
|
|
|
return -EINVAL;
|
|
|
|
|
}
|
|
|
|
|
return put_user(result, (unsigned long __user *) value);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int
|
|
|
|
|
cy_tiocmget(struct tty_struct *tty, struct file *file)
|
|
|
|
|
{
|
|
|
|
|
struct cyclades_port * info = (struct cyclades_port *)tty->driver_data;
|
|
|
|
|
int card,chip,channel,index;
|
|
|
|
|
void __iomem *base_addr;
|
|
|
|
|
unsigned long flags;
|
|
|
|
|
unsigned char status;
|
|
|
|
|
unsigned long lstatus;
|
|
|
|
|
unsigned int result;
|
|
|
|
|
struct FIRM_ID __iomem *firm_id;
|
|
|
|
|
struct ZFW_CTRL __iomem *zfw_ctrl;
|
|
|
|
|
struct BOARD_CTRL __iomem *board_ctrl;
|
|
|
|
|
struct CH_CTRL __iomem *ch_ctrl;
|
|
|
|
|
|
|
|
|
|
if (serial_paranoia_check(info, tty->name, __FUNCTION__))
|
|
|
|
|
return -ENODEV;
|
|
|
|
|
|
|
|
|
|
card = info->card;
|
|
|
|
|
channel = (info->line) - (cy_card[card].first_line);
|
|
|
|
|
if (!IS_CYC_Z(cy_card[card])) {
|
|
|
|
|
chip = channel>>2;
|
|
|
|
|
channel &= 0x03;
|
|
|
|
|
index = cy_card[card].bus_index;
|
|
|
|
|
base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
|
|
|
|
|
|
|
|
|
|
CY_LOCK(info, flags);
|
|
|
|
|
cy_writeb(base_addr+(CyCAR<<index), (u_char)channel);
|
|
|
|
|
status = cy_readb(base_addr+(CyMSVR1<<index));
|
|
|
|
|
status |= cy_readb(base_addr+(CyMSVR2<<index));
|
|
|
|
|
CY_UNLOCK(info, flags);
|
|
|
|
|
|
|
|
|
|
if (info->rtsdtr_inv) {
|
|
|
|
|
result = ((status & CyRTS) ? TIOCM_DTR : 0)
|
|
|
|
|
| ((status & CyDTR) ? TIOCM_RTS : 0);
|
|
|
|
|
} else {
|
|
|
|
|
result = ((status & CyRTS) ? TIOCM_RTS : 0)
|
|
|
|
|
| ((status & CyDTR) ? TIOCM_DTR : 0);
|
|
|
|
|
}
|
|
|
|
|
result |= ((status & CyDCD) ? TIOCM_CAR : 0)
|
|
|
|
|
| ((status & CyRI) ? TIOCM_RNG : 0)
|
|
|
|
|
| ((status & CyDSR) ? TIOCM_DSR : 0)
|
|
|
|
|
| ((status & CyCTS) ? TIOCM_CTS : 0);
|
|
|
|
|
} else {
|
|
|
|
|
base_addr = cy_card[card].base_addr;
|
|
|
|
|
|
|
|
|
|
if (cy_card[card].num_chips != -1){
|
|
|
|
|
return -EINVAL;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
firm_id = cy_card[card].base_addr + ID_ADDRESS;
|
|
|
|
|
if (ISZLOADED(cy_card[card])) {
|
|
|
|
|
zfw_ctrl = cy_card[card].base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
|
|
|
|
|
board_ctrl = &zfw_ctrl->board_ctrl;
|
|
|
|
|
ch_ctrl = zfw_ctrl->ch_ctrl;
|
|
|
|
|
lstatus = cy_readl(&ch_ctrl[channel].rs_status);
|
|
|
|
|
result = ((lstatus & C_RS_RTS) ? TIOCM_RTS : 0)
|
|
|
|
|
| ((lstatus & C_RS_DTR) ? TIOCM_DTR : 0)
|
|
|
|
|
| ((lstatus & C_RS_DCD) ? TIOCM_CAR : 0)
|
|
|
|
|
| ((lstatus & C_RS_RI) ? TIOCM_RNG : 0)
|
|
|
|
|
| ((lstatus & C_RS_DSR) ? TIOCM_DSR : 0)
|
|
|
|
|
| ((lstatus & C_RS_CTS) ? TIOCM_CTS : 0);
|
|
|
|
|
}else{
|
|
|
|
|
result = 0;
|
|
|
|
|
return -ENODEV;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
}
|
|
|
|
|
return result;
|
|
|
|
|
} /* cy_tiomget */
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
static int
|
|
|
|
|
cy_tiocmset(struct tty_struct *tty, struct file *file,
|
|
|
|
|
unsigned int set, unsigned int clear)
|
|
|
|
|
{
|
|
|
|
|
struct cyclades_port * info = (struct cyclades_port *)tty->driver_data;
|
|
|
|
|
int card,chip,channel,index;
|
|
|
|
|
void __iomem *base_addr;
|
|
|
|
|
unsigned long flags;
|
|
|
|
|
struct FIRM_ID __iomem *firm_id;
|
|
|
|
|
struct ZFW_CTRL __iomem *zfw_ctrl;
|
|
|
|
|
struct BOARD_CTRL __iomem *board_ctrl;
|
|
|
|
|
struct CH_CTRL __iomem *ch_ctrl;
|
|
|
|
|
int retval;
|
|
|
|
|
|
|
|
|
|
if (serial_paranoia_check(info, tty->name, __FUNCTION__))
|
|
|
|
|
return -ENODEV;
|
|
|
|
|
|
|
|
|
|
card = info->card;
|
|
|
|
|
channel = (info->line) - (cy_card[card].first_line);
|
|
|
|
|
if (!IS_CYC_Z(cy_card[card])) {
|
|
|
|
|
chip = channel>>2;
|
|
|
|
|
channel &= 0x03;
|
|
|
|
|
index = cy_card[card].bus_index;
|
|
|
|
|
base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
|
|
|
|
|
|
|
|
|
|
if (set & TIOCM_RTS){
|
|
|
|
|
CY_LOCK(info, flags);
|
|
|
|
|
cy_writeb(base_addr+(CyCAR<<index), (u_char)channel);
|
|
|
|
|
if (info->rtsdtr_inv) {
|
|
|
|
|
cy_writeb(base_addr+(CyMSVR2<<index), CyDTR);
|
|
|
|
|
} else {
|
|
|
|
|
cy_writeb(base_addr+(CyMSVR1<<index), CyRTS);
|
|
|
|
|
}
|
|
|
|
|
CY_UNLOCK(info, flags);
|
|
|
|
|
}
|
|
|
|
|
if (clear & TIOCM_RTS) {
|
|
|
|
|
CY_LOCK(info, flags);
|
|
|
|
|
cy_writeb(base_addr+(CyCAR<<index), (u_char)channel);
|
|
|
|
|
if (info->rtsdtr_inv) {
|
|
|
|
|
cy_writeb(base_addr+(CyMSVR2<<index), ~CyDTR);
|
|
|
|
|
} else {
|
|
|
|
|
cy_writeb(base_addr+(CyMSVR1<<index), ~CyRTS);
|
|
|
|
|
}
|
|
|
|
|
CY_UNLOCK(info, flags);
|
|
|
|
|
}
|
|
|
|
|
if (set & TIOCM_DTR){
|
|
|
|
|
CY_LOCK(info, flags);
|
|
|
|
|
cy_writeb(base_addr+(CyCAR<<index), (u_char)channel);
|
|
|
|
|
if (info->rtsdtr_inv) {
|
|
|
|
|
cy_writeb(base_addr+(CyMSVR1<<index), CyRTS);
|
|
|
|
|
} else {
|
|
|
|
|
cy_writeb(base_addr+(CyMSVR2<<index), CyDTR);
|
|
|
|
|
}
|
|
|
|
|
#ifdef CY_DEBUG_DTR
|
|
|
|
|
printk("cyc:set_modem_info raising DTR\n");
|
|
|
|
|
printk(" status: 0x%x, 0x%x\n",
|
|
|
|
|
cy_readb(base_addr+(CyMSVR1<<index)),
|
|
|
|
|
cy_readb(base_addr+(CyMSVR2<<index)));
|
|
|
|
|
#endif
|
|
|
|
|
CY_UNLOCK(info, flags);
|
|
|
|
|
}
|
|
|
|
|
if (clear & TIOCM_DTR) {
|
|
|
|
|
CY_LOCK(info, flags);
|
|
|
|
|
cy_writeb(base_addr+(CyCAR<<index), (u_char)channel);
|
|
|
|
|
if (info->rtsdtr_inv) {
|
|
|
|
|
cy_writeb(base_addr+(CyMSVR1<<index), ~CyRTS);
|
|
|
|
|
} else {
|
|
|
|
|
cy_writeb(base_addr+(CyMSVR2<<index), ~CyDTR);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
#ifdef CY_DEBUG_DTR
|
|
|
|
|
printk("cyc:set_modem_info dropping DTR\n");
|
|
|
|
|
printk(" status: 0x%x, 0x%x\n",
|
|
|
|
|
cy_readb(base_addr+(CyMSVR1<<index)),
|
|
|
|
|
cy_readb(base_addr+(CyMSVR2<<index)));
|
|
|
|
|
#endif
|
|
|
|
|
CY_UNLOCK(info, flags);
|
|
|
|
|
}
|
|
|
|
|
} else {
|
|
|
|
|
base_addr = cy_card[card].base_addr;
|
|
|
|
|
|
|
|
|
|
firm_id = cy_card[card].base_addr + ID_ADDRESS;
|
|
|
|
|
if (ISZLOADED(cy_card[card])) {
|
|
|
|
|
zfw_ctrl = cy_card[card].base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
|
|
|
|
|
board_ctrl = &zfw_ctrl->board_ctrl;
|
|
|
|
|
ch_ctrl = zfw_ctrl->ch_ctrl;
|
|
|
|
|
|
|
|
|
|
if (set & TIOCM_RTS){
|
|
|
|
|
CY_LOCK(info, flags);
|
|
|
|
|
cy_writel(&ch_ctrl[channel].rs_control,
|
|
|
|
|
cy_readl(&ch_ctrl[channel].rs_control) | C_RS_RTS);
|
|
|
|
|
CY_UNLOCK(info, flags);
|
|
|
|
|
}
|
|
|
|
|
if (clear & TIOCM_RTS) {
|
|
|
|
|
CY_LOCK(info, flags);
|
|
|
|
|
cy_writel(&ch_ctrl[channel].rs_control,
|
|
|
|
|
cy_readl(&ch_ctrl[channel].rs_control) & ~C_RS_RTS);
|
|
|
|
|
CY_UNLOCK(info, flags);
|
|
|
|
|
}
|
|
|
|
|
if (set & TIOCM_DTR){
|
|
|
|
|
CY_LOCK(info, flags);
|
|
|
|
|
cy_writel(&ch_ctrl[channel].rs_control,
|
|
|
|
|
cy_readl(&ch_ctrl[channel].rs_control) | C_RS_DTR);
|
|
|
|
|
#ifdef CY_DEBUG_DTR
|
|
|
|
|
printk("cyc:set_modem_info raising Z DTR\n");
|
|
|
|
|
#endif
|
|
|
|
|
CY_UNLOCK(info, flags);
|
|
|
|
|
}
|
|
|
|
|
if (clear & TIOCM_DTR) {
|
|
|
|
|
CY_LOCK(info, flags);
|
|
|
|
|
cy_writel(&ch_ctrl[channel].rs_control,
|
|
|
|
|
cy_readl(&ch_ctrl[channel].rs_control) & ~C_RS_DTR);
|
|
|
|
|
#ifdef CY_DEBUG_DTR
|
|
|
|
|
printk("cyc:set_modem_info clearing Z DTR\n");
|
|
|
|
|
#endif
|
|
|
|
|
CY_UNLOCK(info, flags);
|
|
|
|
|
}
|
|
|
|
|
}else{
|
|
|
|
|
return -ENODEV;
|
|
|
|
|
}
|
|
|
|
|
CY_LOCK(info, flags);
|
|
|
|
|
retval = cyz_issue_cmd(&cy_card[info->card],
|
|
|
|
|
channel, C_CM_IOCTLM,0L);
|
|
|
|
|
if (retval != 0){
|
|
|
|
|
printk("cyc:set_modem_info retval on ttyC%d was %x\n",
|
|
|
|
|
info->line, retval);
|
|
|
|
|
}
|
|
|
|
|
CY_UNLOCK(info, flags);
|
|
|
|
|
}
|
|
|
|
|
return 0;
|
|
|
|
|
} /* cy_tiocmset */
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* cy_break() --- routine which turns the break handling on or off
|
|
|
|
|
*/
|
|
|
|
|
static void
|
|
|
|
|
cy_break(struct tty_struct *tty, int break_state)
|
|
|
|
|
{
|
|
|
|
|
struct cyclades_port * info = (struct cyclades_port *)tty->driver_data;
|
|
|
|
|
unsigned long flags;
|
|
|
|
|
|
|
|
|
|
if (serial_paranoia_check(info, tty->name, "cy_break"))
|
|
|
|
|
return;
|
|
|
|
|
|
|
|
|
|
CY_LOCK(info, flags);
|
|
|
|
|
if (!IS_CYC_Z(cy_card[info->card])) {
|
|
|
|
|
/* Let the transmit ISR take care of this (since it
|
|
|
|
|
requires stuffing characters into the output stream).
|
|
|
|
|
*/
|
|
|
|
|
if (break_state == -1) {
|
|
|
|
|
if (!info->breakon) {
|
|
|
|
|
info->breakon = 1;
|
|
|
|
|
if (!info->xmit_cnt) {
|
|
|
|
|
CY_UNLOCK(info, flags);
|
|
|
|
|
start_xmit(info);
|
|
|
|
|
CY_LOCK(info, flags);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
} else {
|
|
|
|
|
if (!info->breakoff) {
|
|
|
|
|
info->breakoff = 1;
|
|
|
|
|
if (!info->xmit_cnt) {
|
|
|
|
|
CY_UNLOCK(info, flags);
|
|
|
|
|
start_xmit(info);
|
|
|
|
|
CY_LOCK(info, flags);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
} else {
|
|
|
|
|
int retval;
|
|
|
|
|
|
|
|
|
|
if (break_state == -1) {
|
|
|
|
|
retval = cyz_issue_cmd(&cy_card[info->card],
|
|
|
|
|
(info->line) - (cy_card[info->card].first_line),
|
|
|
|
|
C_CM_SET_BREAK, 0L);
|
|
|
|
|
if (retval != 0) {
|
|
|
|
|
printk("cyc:cy_break (set) retval on ttyC%d was %x\n",
|
|
|
|
|
info->line, retval);
|
|
|
|
|
}
|
|
|
|
|
} else {
|
|
|
|
|
retval = cyz_issue_cmd(&cy_card[info->card],
|
|
|
|
|
(info->line) - (cy_card[info->card].first_line),
|
|
|
|
|
C_CM_CLR_BREAK, 0L);
|
|
|
|
|
if (retval != 0) {
|
|
|
|
|
printk("cyc:cy_break (clr) retval on ttyC%d was %x\n",
|
|
|
|
|
info->line, retval);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
CY_UNLOCK(info, flags);
|
|
|
|
|
} /* cy_break */
|
|
|
|
|
|
|
|
|
|
static int
|
|
|
|
|
get_mon_info(struct cyclades_port * info, struct cyclades_monitor __user * mon)
|
|
|
|
|
{
|
|
|
|
|
|
|
|
|
|
if(copy_to_user(mon, &info->mon, sizeof(struct cyclades_monitor)))
|
|
|
|
|
return -EFAULT;
|
|
|
|
|
info->mon.int_count = 0;
|
|
|
|
|
info->mon.char_count = 0;
|
|
|
|
|
info->mon.char_max = 0;
|
|
|
|
|
info->mon.char_last = 0;
|
|
|
|
|
return 0;
|
|
|
|
|
}/* get_mon_info */
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
static int
|
|
|
|
|
set_threshold(struct cyclades_port * info, unsigned long value)
|
|
|
|
|
{
|
|
|
|
|
void __iomem *base_addr;
|
|
|
|
|
int card,channel,chip,index;
|
|
|
|
|
unsigned long flags;
|
|
|
|
|
|
|
|
|
|
card = info->card;
|
|
|
|
|
channel = info->line - cy_card[card].first_line;
|
|
|
|
|
if (!IS_CYC_Z(cy_card[card])) {
|
|
|
|
|
chip = channel>>2;
|
|
|
|
|
channel &= 0x03;
|
|
|
|
|
index = cy_card[card].bus_index;
|
|
|
|
|
base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
|
|
|
|
|
|
|
|
|
|
info->cor3 &= ~CyREC_FIFO;
|
|
|
|
|
info->cor3 |= value & CyREC_FIFO;
|
|
|
|
|
|
|
|
|
|
CY_LOCK(info, flags);
|
|
|
|
|
cy_writeb(base_addr+(CyCOR3<<index), info->cor3);
|
|
|
|
|
cyy_issue_cmd(base_addr,CyCOR_CHANGE|CyCOR3ch,index);
|
|
|
|
|
CY_UNLOCK(info, flags);
|
|
|
|
|
} else {
|
|
|
|
|
// Nothing to do!
|
|
|
|
|
}
|
|
|
|
|
return 0;
|
|
|
|
|
}/* set_threshold */
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
static int
|
|
|
|
|
get_threshold(struct cyclades_port * info, unsigned long __user *value)
|
|
|
|
|
{
|
|
|
|
|
void __iomem *base_addr;
|
|
|
|
|
int card,channel,chip,index;
|
|
|
|
|
unsigned long tmp;
|
|
|
|
|
|
|
|
|
|
card = info->card;
|
|
|
|
|
channel = info->line - cy_card[card].first_line;
|
|
|
|
|
if (!IS_CYC_Z(cy_card[card])) {
|
|
|
|
|
chip = channel>>2;
|
|
|
|
|
channel &= 0x03;
|
|
|
|
|
index = cy_card[card].bus_index;
|
|
|
|
|
base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
|
|
|
|
|
|
|
|
|
|
tmp = cy_readb(base_addr+(CyCOR3<<index)) & CyREC_FIFO;
|
|
|
|
|
return put_user(tmp,value);
|
|
|
|
|
} else {
|
|
|
|
|
// Nothing to do!
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
}/* get_threshold */
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
static int
|
|
|
|
|
set_default_threshold(struct cyclades_port * info, unsigned long value)
|
|
|
|
|
{
|
|
|
|
|
info->default_threshold = value & 0x0f;
|
|
|
|
|
return 0;
|
|
|
|
|
}/* set_default_threshold */
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
static int
|
|
|
|
|
get_default_threshold(struct cyclades_port * info, unsigned long __user *value)
|
|
|
|
|
{
|
|
|
|
|
return put_user(info->default_threshold,value);
|
|
|
|
|
}/* get_default_threshold */
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
static int
|
|
|
|
|
set_timeout(struct cyclades_port * info, unsigned long value)
|
|
|
|
|
{
|
|
|
|
|
void __iomem *base_addr;
|
|
|
|
|
int card,channel,chip,index;
|
|
|
|
|
unsigned long flags;
|
|
|
|
|
|
|
|
|
|
card = info->card;
|
|
|
|
|
channel = info->line - cy_card[card].first_line;
|
|
|
|
|
if (!IS_CYC_Z(cy_card[card])) {
|
|
|
|
|
chip = channel>>2;
|
|
|
|
|
channel &= 0x03;
|
|
|
|
|
index = cy_card[card].bus_index;
|
|
|
|
|
base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
|
|
|
|
|
|
|
|
|
|
CY_LOCK(info, flags);
|
|
|
|
|
cy_writeb(base_addr+(CyRTPR<<index), value & 0xff);
|
|
|
|
|
CY_UNLOCK(info, flags);
|
|
|
|
|
} else {
|
|
|
|
|
// Nothing to do!
|
|
|
|
|
}
|
|
|
|
|
return 0;
|
|
|
|
|
}/* set_timeout */
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
static int
|
|
|
|
|
get_timeout(struct cyclades_port * info, unsigned long __user *value)
|
|
|
|
|
{
|
|
|
|
|
void __iomem *base_addr;
|
|
|
|
|
int card,channel,chip,index;
|
|
|
|
|
unsigned long tmp;
|
|
|
|
|
|
|
|
|
|
card = info->card;
|
|
|
|
|
channel = info->line - cy_card[card].first_line;
|
|
|
|
|
if (!IS_CYC_Z(cy_card[card])) {
|
|
|
|
|
chip = channel>>2;
|
|
|
|
|
channel &= 0x03;
|
|
|
|
|
index = cy_card[card].bus_index;
|
|
|
|
|
base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
|
|
|
|
|
|
|
|
|
|
tmp = cy_readb(base_addr+(CyRTPR<<index));
|
|
|
|
|
return put_user(tmp,value);
|
|
|
|
|
} else {
|
|
|
|
|
// Nothing to do!
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
}/* get_timeout */
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
static int
|
|
|
|
|
set_default_timeout(struct cyclades_port * info, unsigned long value)
|
|
|
|
|
{
|
|
|
|
|
info->default_timeout = value & 0xff;
|
|
|
|
|
return 0;
|
|
|
|
|
}/* set_default_timeout */
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
static int
|
|
|
|
|
get_default_timeout(struct cyclades_port * info, unsigned long __user *value)
|
|
|
|
|
{
|
|
|
|
|
return put_user(info->default_timeout,value);
|
|
|
|
|
}/* get_default_timeout */
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* This routine allows the tty driver to implement device-
|
|
|
|
|
* specific ioctl's. If the ioctl number passed in cmd is
|
|
|
|
|
* not recognized by the driver, it should return ENOIOCTLCMD.
|
|
|
|
|
*/
|
|
|
|
|
static int
|
|
|
|
|
cy_ioctl(struct tty_struct *tty, struct file * file,
|
|
|
|
|
unsigned int cmd, unsigned long arg)
|
|
|
|
|
{
|
|
|
|
|
struct cyclades_port * info = (struct cyclades_port *)tty->driver_data;
|
|
|
|
|
struct cyclades_icount cprev, cnow; /* kernel counter temps */
|
|
|
|
|
struct serial_icounter_struct __user *p_cuser; /* user space */
|
|
|
|
|
int ret_val = 0;
|
|
|
|
|
unsigned long flags;
|
|
|
|
|
void __user *argp = (void __user *)arg;
|
|
|
|
|
|
|
|
|
|
if (serial_paranoia_check(info, tty->name, "cy_ioctl"))
|
|
|
|
|
return -ENODEV;
|
|
|
|
|
|
|
|
|
|
#ifdef CY_DEBUG_OTHER
|
|
|
|
|
printk("cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n",
|
|
|
|
|
info->line, cmd, arg); /* */
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
switch (cmd) {
|
|
|
|
|
case CYGETMON:
|
|
|
|
|
ret_val = get_mon_info(info, argp);
|
|
|
|
|
break;
|
|
|
|
|
case CYGETTHRESH:
|
|
|
|
|
ret_val = get_threshold(info, argp);
|
|
|
|
|
break;
|
|
|
|
|
case CYSETTHRESH:
|
|
|
|
|
ret_val = set_threshold(info, arg);
|
|
|
|
|
break;
|
|
|
|
|
case CYGETDEFTHRESH:
|
|
|
|
|
ret_val = get_default_threshold(info, argp);
|
|
|
|
|
break;
|
|
|
|
|
case CYSETDEFTHRESH:
|
|
|
|
|
ret_val = set_default_threshold(info, arg);
|
|
|
|
|
break;
|
|
|
|
|
case CYGETTIMEOUT:
|
|
|
|
|
ret_val = get_timeout(info, argp);
|
|
|
|
|
break;
|
|
|
|
|
case CYSETTIMEOUT:
|
|
|
|
|
ret_val = set_timeout(info, arg);
|
|
|
|
|
break;
|
|
|
|
|
case CYGETDEFTIMEOUT:
|
|
|
|
|
ret_val = get_default_timeout(info, argp);
|
|
|
|
|
break;
|
|
|
|
|
case CYSETDEFTIMEOUT:
|
|
|
|
|
ret_val = set_default_timeout(info, arg);
|
|
|
|
|
break;
|
|
|
|
|
case CYSETRFLOW:
|
|
|
|
|
info->rflow = (int)arg;
|
|
|
|
|
ret_val = 0;
|
|
|
|
|
break;
|
|
|
|
|
case CYGETRFLOW:
|
|
|
|
|
ret_val = info->rflow;
|
|
|
|
|
break;
|
|
|
|
|
case CYSETRTSDTR_INV:
|
|
|
|
|
info->rtsdtr_inv = (int)arg;
|
|
|
|
|
ret_val = 0;
|
|
|
|
|
break;
|
|
|
|
|
case CYGETRTSDTR_INV:
|
|
|
|
|
ret_val = info->rtsdtr_inv;
|
|
|
|
|
break;
|
|
|
|
|
case CYGETCARDINFO:
|
|
|
|
|
if (copy_to_user(argp, &cy_card[info->card],
|
|
|
|
|
sizeof (struct cyclades_card))) {
|
|
|
|
|
ret_val = -EFAULT;
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
ret_val = 0;
|
|
|
|
|
break;
|
|
|
|
|
case CYGETCD1400VER:
|
|
|
|
|
ret_val = info->chip_rev;
|
|
|
|
|
break;
|
|
|
|
|
#ifndef CONFIG_CYZ_INTR
|
|
|
|
|
case CYZSETPOLLCYCLE:
|
|
|
|
|
cyz_polling_cycle = (arg * HZ) / 1000;
|
|
|
|
|
ret_val = 0;
|
|
|
|
|
break;
|
|
|
|
|
case CYZGETPOLLCYCLE:
|
|
|
|
|
ret_val = (cyz_polling_cycle * 1000) / HZ;
|
|
|
|
|
break;
|
|
|
|
|
#endif /* CONFIG_CYZ_INTR */
|
|
|
|
|
case CYSETWAIT:
|
|
|
|
|
info->closing_wait = (unsigned short)arg * HZ/100;
|
|
|
|
|
ret_val = 0;
|
|
|
|
|
break;
|
|
|
|
|
case CYGETWAIT:
|
|
|
|
|
ret_val = info->closing_wait / (HZ/100);
|
|
|
|
|
break;
|
|
|
|
|
case TIOCGSERIAL:
|
|
|
|
|
ret_val = get_serial_info(info, argp);
|
|
|
|
|
break;
|
|
|
|
|
case TIOCSSERIAL:
|
|
|
|
|
ret_val = set_serial_info(info, argp);
|
|
|
|
|
break;
|
|
|
|
|
case TIOCSERGETLSR: /* Get line status register */
|
|
|
|
|
ret_val = get_lsr_info(info, argp);
|
|
|
|
|
break;
|
|
|
|
|
/*
|
|
|
|
|
* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
|
|
|
|
|
* - mask passed in arg for lines of interest
|
|
|
|
|
* (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
|
|
|
|
|
* Caller should use TIOCGICOUNT to see which one it was
|
|
|
|
|
*/
|
|
|
|
|
case TIOCMIWAIT:
|
|
|
|
|
CY_LOCK(info, flags);
|
|
|
|
|
/* note the counters on entry */
|
|
|
|
|
cprev = info->icount;
|
|
|
|
|
CY_UNLOCK(info, flags);
|
|
|
|
|
while (1) {
|
|
|
|
|
interruptible_sleep_on(&info->delta_msr_wait);
|
|
|
|
|
/* see if a signal did it */
|
|
|
|
|
if (signal_pending(current)) {
|
|
|
|
|
return -ERESTARTSYS;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
CY_LOCK(info, flags);
|
|
|
|
|
cnow = info->icount; /* atomic copy */
|
|
|
|
|
CY_UNLOCK(info, flags);
|
|
|
|
|
|
|
|
|
|
if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
|
|
|
|
|
cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) {
|
|
|
|
|
return -EIO; /* no change => error */
|
|
|
|
|
}
|
|
|
|
|
if ( ((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
|
|
|
|
|
((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
|
|
|
|
|
((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
|
|
|
|
|
((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)) ) {
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
cprev = cnow;
|
|
|
|
|
}
|
|
|
|
|
/* NOTREACHED */
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
|
|
|
|
|
* Return: write counters to the user passed counter struct
|
|
|
|
|
* NB: both 1->0 and 0->1 transitions are counted except for
|
|
|
|
|
* RI where only 0->1 is counted.
|
|
|
|
|
*/
|
|
|
|
|
case TIOCGICOUNT:
|
|
|
|
|
CY_LOCK(info, flags);
|
|
|
|
|
cnow = info->icount;
|
|
|
|
|
CY_UNLOCK(info, flags);
|
|
|
|
|
p_cuser = argp;
|
|
|
|
|
ret_val = put_user(cnow.cts, &p_cuser->cts);
|
|
|
|
|
if (ret_val) return ret_val;
|
|
|
|
|
ret_val = put_user(cnow.dsr, &p_cuser->dsr);
|
|
|
|
|
if (ret_val) return ret_val;
|
|
|
|
|
ret_val = put_user(cnow.rng, &p_cuser->rng);
|
|
|
|
|
if (ret_val) return ret_val;
|
|
|
|
|
ret_val = put_user(cnow.dcd, &p_cuser->dcd);
|
|
|
|
|
if (ret_val) return ret_val;
|
|
|
|
|
ret_val = put_user(cnow.rx, &p_cuser->rx);
|
|
|
|
|
if (ret_val) return ret_val;
|
|
|
|
|
ret_val = put_user(cnow.tx, &p_cuser->tx);
|
|
|
|
|
if (ret_val) return ret_val;
|
|
|
|
|
ret_val = put_user(cnow.frame, &p_cuser->frame);
|
|
|
|
|
if (ret_val) return ret_val;
|
|
|
|
|
ret_val = put_user(cnow.overrun, &p_cuser->overrun);
|
|
|
|
|
if (ret_val) return ret_val;
|
|
|
|
|
ret_val = put_user(cnow.parity, &p_cuser->parity);
|
|
|
|
|
if (ret_val) return ret_val;
|
|
|
|
|
ret_val = put_user(cnow.brk, &p_cuser->brk);
|
|
|
|
|
if (ret_val) return ret_val;
|
|
|
|
|
ret_val = put_user(cnow.buf_overrun, &p_cuser->buf_overrun);
|
|
|
|
|
if (ret_val) return ret_val;
|
|
|
|
|
ret_val = 0;
|
|
|
|
|
break;
|
|
|
|
|
default:
|
|
|
|
|
ret_val = -ENOIOCTLCMD;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
#ifdef CY_DEBUG_OTHER
|
|
|
|
|
printk(" cyc:cy_ioctl done\n");
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
return ret_val;
|
|
|
|
|
} /* cy_ioctl */
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* This routine allows the tty driver to be notified when
|
|
|
|
|
* device's termios settings have changed. Note that a
|
|
|
|
|
* well-designed tty driver should be prepared to accept the case
|
|
|
|
|
* where old == NULL, and try to do something rational.
|
|
|
|
|
*/
|
|
|
|
|
static void
|
|
|
|
|
cy_set_termios(struct tty_struct *tty, struct termios * old_termios)
|
|
|
|
|
{
|
|
|
|
|
struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
|
|
|
|
|
|
|
|
|
|
#ifdef CY_DEBUG_OTHER
|
|
|
|
|
printk("cyc:cy_set_termios ttyC%d\n", info->line);
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
if ((tty->termios->c_cflag == old_termios->c_cflag) &&
|
|
|
|
|
((tty->termios->c_iflag & (IXON|IXANY)) ==
|
|
|
|
|
(old_termios->c_iflag & (IXON|IXANY))))
|
|
|
|
|
return;
|
|
|
|
|
set_line_char(info);
|
|
|
|
|
|
|
|
|
|
if ((old_termios->c_cflag & CRTSCTS) &&
|
|
|
|
|
!(tty->termios->c_cflag & CRTSCTS)) {
|
|
|
|
|
tty->hw_stopped = 0;
|
|
|
|
|
cy_start(tty);
|
|
|
|
|
}
|
|
|
|
|
#if 0
|
|
|
|
|
/*
|
|
|
|
|
* No need to wake up processes in open wait, since they
|
|
|
|
|
* sample the CLOCAL flag once, and don't recheck it.
|
|
|
|
|
* XXX It's not clear whether the current behavior is correct
|
|
|
|
|
* or not. Hence, this may change.....
|
|
|
|
|
*/
|
|
|
|
|
if (!(old_termios->c_cflag & CLOCAL) &&
|
|
|
|
|
(tty->termios->c_cflag & CLOCAL))
|
|
|
|
|
wake_up_interruptible(&info->open_wait);
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
return;
|
|
|
|
|
} /* cy_set_termios */
|
|
|
|
|
|
|
|
|
|
/* This function is used to send a high-priority XON/XOFF character to
|
|
|
|
|
the device.
|
|
|
|
|
*/
|
|
|
|
|
static void
|
|
|
|
|
cy_send_xchar (struct tty_struct *tty, char ch)
|
|
|
|
|
{
|
|
|
|
|
struct cyclades_port *info = (struct cyclades_port *) tty->driver_data;
|
|
|
|
|
int card, channel;
|
|
|
|
|
|
|
|
|
|
if (serial_paranoia_check (info, tty->name, "cy_send_xchar"))
|
|
|
|
|
return;
|
|
|
|
|
|
|
|
|
|
info->x_char = ch;
|
|
|
|
|
|
|
|
|
|
if (ch)
|
|
|
|
|
cy_start (tty);
|
|
|
|
|
|
|
|
|
|
card = info->card;
|
|
|
|
|
channel = info->line - cy_card[card].first_line;
|
|
|
|
|
|
|
|
|
|
if (IS_CYC_Z (cy_card[card])) {
|
|
|
|
|
if (ch == STOP_CHAR (tty))
|
|
|
|
|
cyz_issue_cmd (&cy_card[card], channel, C_CM_SENDXOFF, 0L);
|
|
|
|
|
else if (ch == START_CHAR (tty))
|
|
|
|
|
cyz_issue_cmd (&cy_card[card], channel, C_CM_SENDXON, 0L);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* This routine is called by the upper-layer tty layer to signal
|
|
|
|
|
that incoming characters should be throttled because the input
|
|
|
|
|
buffers are close to full.
|
|
|
|
|
*/
|
|
|
|
|
static void
|
|
|
|
|
cy_throttle(struct tty_struct * tty)
|
|
|
|
|
{
|
|
|
|
|
struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
|
|
|
|
|
unsigned long flags;
|
|
|
|
|
void __iomem *base_addr;
|
|
|
|
|
int card,chip,channel,index;
|
|
|
|
|
|
|
|
|
|
#ifdef CY_DEBUG_THROTTLE
|
|
|
|
|
char buf[64];
|
|
|
|
|
|
|
|
|
|
printk("cyc:throttle %s: %d....ttyC%d\n",
|
|
|
|
|
tty_name(tty, buf),
|
|
|
|
|
tty->ldisc.chars_in_buffer(tty), info->line);
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
if (serial_paranoia_check(info, tty->name, "cy_throttle")){
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
card = info->card;
|
|
|
|
|
|
|
|
|
|
if (I_IXOFF(tty)) {
|
|
|
|
|
if (!IS_CYC_Z (cy_card[card]))
|
|
|
|
|
cy_send_xchar (tty, STOP_CHAR (tty));
|
|
|
|
|
else
|
|
|
|
|
info->throttle = 1;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (tty->termios->c_cflag & CRTSCTS) {
|
|
|
|
|
channel = info->line - cy_card[card].first_line;
|
|
|
|
|
if (!IS_CYC_Z(cy_card[card])) {
|
|
|
|
|
chip = channel>>2;
|
|
|
|
|
channel &= 0x03;
|
|
|
|
|
index = cy_card[card].bus_index;
|
|
|
|
|
base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
|
|
|
|
|
|
|
|
|
|
CY_LOCK(info, flags);
|
|
|
|
|
cy_writeb(base_addr+(CyCAR<<index), (u_char)channel);
|
|
|
|
|
if (info->rtsdtr_inv) {
|
|
|
|
|
cy_writeb(base_addr+(CyMSVR2<<index), ~CyDTR);
|
|
|
|
|
} else {
|
|
|
|
|
cy_writeb(base_addr+(CyMSVR1<<index), ~CyRTS);
|
|
|
|
|
}
|
|
|
|
|
CY_UNLOCK(info, flags);
|
|
|
|
|
} else {
|
|
|
|
|
info->throttle = 1;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return;
|
|
|
|
|
} /* cy_throttle */
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* This routine notifies the tty driver that it should signal
|
|
|
|
|
* that characters can now be sent to the tty without fear of
|
|
|
|
|
* overrunning the input buffers of the line disciplines.
|
|
|
|
|
*/
|
|
|
|
|
static void
|
|
|
|
|
cy_unthrottle(struct tty_struct * tty)
|
|
|
|
|
{
|
|
|
|
|
struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
|
|
|
|
|
unsigned long flags;
|
|
|
|
|
void __iomem *base_addr;
|
|
|
|
|
int card,chip,channel,index;
|
|
|
|
|
|
|
|
|
|
#ifdef CY_DEBUG_THROTTLE
|
|
|
|
|
char buf[64];
|
|
|
|
|
|
|
|
|
|
printk("cyc:unthrottle %s: %d....ttyC%d\n",
|
|
|
|
|
tty_name(tty, buf),
|
|
|
|
|
tty->ldisc.chars_in_buffer(tty), info->line);
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
if (serial_paranoia_check(info, tty->name, "cy_unthrottle")){
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (I_IXOFF(tty)) {
|
|
|
|
|
if (info->x_char)
|
|
|
|
|
info->x_char = 0;
|
|
|
|
|
else
|
|
|
|
|
cy_send_xchar (tty, START_CHAR (tty));
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (tty->termios->c_cflag & CRTSCTS) {
|
|
|
|
|
card = info->card;
|
|
|
|
|
channel = info->line - cy_card[card].first_line;
|
|
|
|
|
if (!IS_CYC_Z(cy_card[card])) {
|
|
|
|
|
chip = channel>>2;
|
|
|
|
|
channel &= 0x03;
|
|
|
|
|
index = cy_card[card].bus_index;
|
|
|
|
|
base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
|
|
|
|
|
|
|
|
|
|
CY_LOCK(info, flags);
|
|
|
|
|
cy_writeb(base_addr+(CyCAR<<index), (u_char)channel);
|
|
|
|
|
if (info->rtsdtr_inv) {
|
|
|
|
|
cy_writeb(base_addr+(CyMSVR2<<index), CyDTR);
|
|
|
|
|
} else {
|
|
|
|
|
cy_writeb(base_addr+(CyMSVR1<<index), CyRTS);
|
|
|
|
|
}
|
|
|
|
|
CY_UNLOCK(info, flags);
|
|
|
|
|
} else {
|
|
|
|
|
info->throttle = 0;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return;
|
|
|
|
|
} /* cy_unthrottle */
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/* cy_start and cy_stop provide software output flow control as a
|
|
|
|
|
function of XON/XOFF, software CTS, and other such stuff.
|
|
|
|
|
*/
|
|
|
|
|
static void
|
|
|
|
|
cy_stop(struct tty_struct *tty)
|
|
|
|
|
{
|
|
|
|
|
struct cyclades_card *cinfo;
|
|
|
|
|
struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
|
|
|
|
|
void __iomem *base_addr;
|
|
|
|
|
int chip,channel,index;
|
|
|
|
|
unsigned long flags;
|
|
|
|
|
|
|
|
|
|
#ifdef CY_DEBUG_OTHER
|
|
|
|
|
printk("cyc:cy_stop ttyC%d\n", info->line); /* */
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
if (serial_paranoia_check(info, tty->name, "cy_stop"))
|
|
|
|
|
return;
|
|
|
|
|
|
|
|
|
|
cinfo = &cy_card[info->card];
|
|
|
|
|
channel = info->line - cinfo->first_line;
|
|
|
|
|
if (!IS_CYC_Z(*cinfo)) {
|
|
|
|
|
index = cinfo->bus_index;
|
|
|
|
|
chip = channel>>2;
|
|
|
|
|
channel &= 0x03;
|
|
|
|
|
base_addr = cy_card[info->card].base_addr + (cy_chip_offset[chip]<<index);
|
|
|
|
|
|
|
|
|
|
CY_LOCK(info, flags);
|
|
|
|
|
cy_writeb(base_addr+(CyCAR<<index),
|
|
|
|
|
(u_char)(channel & 0x0003)); /* index channel */
|
|
|
|
|
cy_writeb(base_addr+(CySRER<<index),
|
|
|
|
|
cy_readb(base_addr+(CySRER<<index)) & ~CyTxRdy);
|
|
|
|
|
CY_UNLOCK(info, flags);
|
|
|
|
|
} else {
|
|
|
|
|
// Nothing to do!
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return;
|
|
|
|
|
} /* cy_stop */
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
|
cy_start(struct tty_struct *tty)
|
|
|
|
|
{
|
|
|
|
|
struct cyclades_card *cinfo;
|
|
|
|
|
struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
|
|
|
|
|
void __iomem *base_addr;
|
|
|
|
|
int chip,channel,index;
|
|
|
|
|
unsigned long flags;
|
|
|
|
|
|
|
|
|
|
#ifdef CY_DEBUG_OTHER
|
|
|
|
|
printk("cyc:cy_start ttyC%d\n", info->line); /* */
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
if (serial_paranoia_check(info, tty->name, "cy_start"))
|
|
|
|
|
return;
|
|
|
|
|
|
|
|
|
|
cinfo = &cy_card[info->card];
|
|
|
|
|
channel = info->line - cinfo->first_line;
|
|
|
|
|
index = cinfo->bus_index;
|
|
|
|
|
if (!IS_CYC_Z(*cinfo)) {
|
|
|
|
|
chip = channel>>2;
|
|
|
|
|
channel &= 0x03;
|
|
|
|
|
base_addr = cy_card[info->card].base_addr + (cy_chip_offset[chip]<<index);
|
|
|
|
|
|
|
|
|
|
CY_LOCK(info, flags);
|
|
|
|
|
cy_writeb(base_addr+(CyCAR<<index),
|
|
|
|
|
(u_char)(channel & 0x0003)); /* index channel */
|
|
|
|
|
cy_writeb(base_addr+(CySRER<<index),
|
|
|
|
|
cy_readb(base_addr+(CySRER<<index)) | CyTxRdy);
|
|
|
|
|
CY_UNLOCK(info, flags);
|
|
|
|
|
} else {
|
|
|
|
|
// Nothing to do!
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return;
|
|
|
|
|
} /* cy_start */
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
|
cy_flush_buffer(struct tty_struct *tty)
|
|
|
|
|
{
|
|
|
|
|
struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
|
|
|
|
|
int card, channel, retval;
|
|
|
|
|
unsigned long flags;
|
|
|
|
|
|
|
|
|
|
#ifdef CY_DEBUG_IO
|
|
|
|
|
printk("cyc:cy_flush_buffer ttyC%d\n", info->line); /* */
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
if (serial_paranoia_check(info, tty->name, "cy_flush_buffer"))
|
|
|
|
|
return;
|
|
|
|
|
|
|
|
|
|
card = info->card;
|
|
|
|
|
channel = (info->line) - (cy_card[card].first_line);
|
|
|
|
|
|
|
|
|
|
CY_LOCK(info, flags);
|
|
|
|
|
info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
|
|
|
|
|
CY_UNLOCK(info, flags);
|
|
|
|
|
|
|
|
|
|
if (IS_CYC_Z(cy_card[card])) { /* If it is a Z card, flush the on-board
|
|
|
|
|
buffers as well */
|
|
|
|
|
CY_LOCK(info, flags);
|
|
|
|
|
retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_FLUSH_TX, 0L);
|
|
|
|
|
if (retval != 0) {
|
|
|
|
|
printk("cyc: flush_buffer retval on ttyC%d was %x\n",
|
|
|
|
|
info->line, retval);
|
|
|
|
|
}
|
|
|
|
|
CY_UNLOCK(info, flags);
|
|
|
|
|
}
|
|
|
|
|
tty_wakeup(tty);
|
|
|
|
|
wake_up_interruptible(&tty->write_wait);
|
|
|
|
|
} /* cy_flush_buffer */
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* cy_hangup() --- called by tty_hangup() when a hangup is signaled.
|
|
|
|
|
*/
|
|
|
|
|
static void
|
|
|
|
|
cy_hangup(struct tty_struct *tty)
|
|
|
|
|
{
|
|
|
|
|
struct cyclades_port * info = (struct cyclades_port *)tty->driver_data;
|
|
|
|
|
|
|
|
|
|
#ifdef CY_DEBUG_OTHER
|
|
|
|
|
printk("cyc:cy_hangup ttyC%d\n", info->line); /* */
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
if (serial_paranoia_check(info, tty->name, "cy_hangup"))
|
|
|
|
|
return;
|
|
|
|
|
|
|
|
|
|
cy_flush_buffer(tty);
|
|
|
|
|
shutdown(info);
|
|
|
|
|
info->event = 0;
|
|
|
|
|
info->count = 0;
|
|
|
|
|
#ifdef CY_DEBUG_COUNT
|
|
|
|
|
printk("cyc:cy_hangup (%d): setting count to 0\n", current->pid);
|
|
|
|
|
#endif
|
|
|
|
|
info->tty = NULL;
|
|
|
|
|
info->flags &= ~ASYNC_NORMAL_ACTIVE;
|
|
|
|
|
wake_up_interruptible(&info->open_wait);
|
|
|
|
|
} /* cy_hangup */
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* ---------------------------------------------------------------------
|
|
|
|
|
* cy_init() and friends
|
|
|
|
|
*
|
|
|
|
|
* cy_init() is called at boot-time to initialize the serial driver.
|
|
|
|
|
* ---------------------------------------------------------------------
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
/* initialize chips on Cyclom-Y card -- return number of valid
|
|
|
|
|
chips (which is number of ports/4) */
|
|
|
|
|
static unsigned short __init
|
|
|
|
|
cyy_init_card(void __iomem *true_base_addr,int index)
|
|
|
|
|
{
|
|
|
|
|
unsigned int chip_number;
|
|
|
|
|
void __iomem *base_addr;
|
|
|
|
|
|
|
|
|
|
cy_writeb(true_base_addr+(Cy_HwReset<<index), 0);
|
|
|
|
|
/* Cy_HwReset is 0x1400 */
|
|
|
|
|
cy_writeb(true_base_addr+(Cy_ClrIntr<<index), 0);
|
|
|
|
|
/* Cy_ClrIntr is 0x1800 */
|
|
|
|
|
udelay(500L);
|
|
|
|
|
|
|
|
|
|
for(chip_number=0; chip_number<CyMAX_CHIPS_PER_CARD; chip_number++){
|
|
|
|
|
base_addr = true_base_addr + (cy_chip_offset[chip_number]<<index);
|
|
|
|
|
mdelay(1);
|
|
|
|
|
if(cy_readb(base_addr+(CyCCR<<index)) != 0x00){
|
|
|
|
|
/*************
|
|
|
|
|
printk(" chip #%d at %#6lx is never idle (CCR != 0)\n",
|
|
|
|
|
chip_number, (unsigned long)base_addr);
|
|
|
|
|
*************/
|
|
|
|
|
return chip_number;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
cy_writeb(base_addr+(CyGFRCR<<index), 0);
|
|
|
|
|
udelay(10L);
|
|
|
|
|
|
|
|
|
|
/* The Cyclom-16Y does not decode address bit 9 and therefore
|
|
|
|
|
cannot distinguish between references to chip 0 and a non-
|
|
|
|
|
existent chip 4. If the preceding clearing of the supposed
|
|
|
|
|
chip 4 GFRCR register appears at chip 0, there is no chip 4
|
|
|
|
|
and this must be a Cyclom-16Y, not a Cyclom-32Ye.
|
|
|
|
|
*/
|
|
|
|
|
if (chip_number == 4
|
|
|
|
|
&& cy_readb(true_base_addr
|
|
|
|
|
+ (cy_chip_offset[0]<<index)
|
|
|
|
|
+ (CyGFRCR<<index)) == 0){
|
|
|
|
|
return chip_number;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
cy_writeb(base_addr+(CyCCR<<index), CyCHIP_RESET);
|
|
|
|
|
mdelay(1);
|
|
|
|
|
|
|
|
|
|
if(cy_readb(base_addr+(CyGFRCR<<index)) == 0x00){
|
|
|
|
|
/*
|
|
|
|
|
printk(" chip #%d at %#6lx is not responding ",
|
|
|
|
|
chip_number, (unsigned long)base_addr);
|
|
|
|
|
printk("(GFRCR stayed 0)\n",
|
|
|
|
|
*/
|
|
|
|
|
return chip_number;
|
|
|
|
|
}
|
|
|
|
|
if((0xf0 & (cy_readb(base_addr+(CyGFRCR<<index)))) != 0x40){
|
|
|
|
|
/*
|
|
|
|
|
printk(" chip #%d at %#6lx is not valid (GFRCR == %#2x)\n",
|
|
|
|
|
chip_number, (unsigned long)base_addr,
|
|
|
|
|
base_addr[CyGFRCR<<index]);
|
|
|
|
|
*/
|
|
|
|
|
return chip_number;
|
|
|
|
|
}
|
|
|
|
|
cy_writeb(base_addr+(CyGCR<<index), CyCH0_SERIAL);
|
|
|
|
|
if (cy_readb(base_addr+(CyGFRCR<<index)) >= CD1400_REV_J){
|
|
|
|
|
/* It is a CD1400 rev. J or later */
|
|
|
|
|
/* Impossible to reach 5ms with this chip.
|
|
|
|
|
Changed to 2ms instead (f = 500 Hz). */
|
|
|
|
|
cy_writeb(base_addr+(CyPPR<<index), CyCLOCK_60_2MS);
|
|
|
|
|
} else {
|
|
|
|
|
/* f = 200 Hz */
|
|
|
|
|
cy_writeb(base_addr+(CyPPR<<index), CyCLOCK_25_5MS);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
printk(" chip #%d at %#6lx is rev 0x%2x\n",
|
|
|
|
|
chip_number, (unsigned long)base_addr,
|
|
|
|
|
cy_readb(base_addr+(CyGFRCR<<index)));
|
|
|
|
|
*/
|
|
|
|
|
}
|
|
|
|
|
return chip_number;
|
|
|
|
|
} /* cyy_init_card */
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* ---------------------------------------------------------------------
|
|
|
|
|
* cy_detect_isa() - Probe for Cyclom-Y/ISA boards.
|
|
|
|
|
* sets global variables and return the number of ISA boards found.
|
|
|
|
|
* ---------------------------------------------------------------------
|
|
|
|
|
*/
|
|
|
|
|
static int __init
|
|
|
|
|
cy_detect_isa(void)
|
|
|
|
|
{
|
|
|
|
|
#ifdef CONFIG_ISA
|
|
|
|
|
unsigned short cy_isa_irq,nboard;
|
|
|
|
|
void __iomem *cy_isa_address;
|
|
|
|
|
unsigned short i,j,cy_isa_nchan;
|
|
|
|
|
#ifdef MODULE
|
|
|
|
|
int isparam = 0;
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
nboard = 0;
|
|
|
|
|
|
|
|
|
|
#ifdef MODULE
|
|
|
|
|
/* Check for module parameters */
|
|
|
|
|
for(i = 0 ; i < NR_CARDS; i++) {
|
|
|
|
|
if (maddr[i] || i) {
|
|
|
|
|
isparam = 1;
|
|
|
|
|
cy_isa_addresses[i] = maddr[i];
|
|
|
|
|
}
|
|
|
|
|
if (!maddr[i])
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
/* scan the address table probing for Cyclom-Y/ISA boards */
|
|
|
|
|
for (i = 0 ; i < NR_ISA_ADDRS ; i++) {
|
|
|
|
|
unsigned int isa_address = cy_isa_addresses[i];
|
|
|
|
|
if (isa_address == 0x0000) {
|
|
|
|
|
return(nboard);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* probe for CD1400... */
|
|
|
|
|
cy_isa_address = ioremap(isa_address, CyISA_Ywin);
|
|
|
|
|
cy_isa_nchan = CyPORTS_PER_CHIP *
|
|
|
|
|
cyy_init_card(cy_isa_address,0);
|
|
|
|
|
if (cy_isa_nchan == 0) {
|
|
|
|
|
continue;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
#ifdef MODULE
|
|
|
|
|
if (isparam && irq[i])
|
|
|
|
|
cy_isa_irq = irq[i];
|
|
|
|
|
else
|
|
|
|
|
#endif
|
|
|
|
|
/* find out the board's irq by probing */
|
|
|
|
|
cy_isa_irq = detect_isa_irq(cy_isa_address);
|
|
|
|
|
if (cy_isa_irq == 0) {
|
|
|
|
|
printk("Cyclom-Y/ISA found at 0x%lx ",
|
|
|
|
|
(unsigned long) cy_isa_address);
|
|
|
|
|
printk("but the IRQ could not be detected.\n");
|
|
|
|
|
continue;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if((cy_next_channel+cy_isa_nchan) > NR_PORTS) {
|
|
|
|
|
printk("Cyclom-Y/ISA found at 0x%lx ",
|
|
|
|
|
(unsigned long) cy_isa_address);
|
|
|
|
|
printk("but no more channels are available.\n");
|
|
|
|
|
printk("Change NR_PORTS in cyclades.c and recompile kernel.\n");
|
|
|
|
|
return(nboard);
|
|
|
|
|
}
|
|
|
|
|
/* fill the next cy_card structure available */
|
|
|
|
|
for (j = 0 ; j < NR_CARDS ; j++) {
|
|
|
|
|
if (cy_card[j].base_addr == 0) break;
|
|
|
|
|
}
|
|
|
|
|
if (j == NR_CARDS) { /* no more cy_cards available */
|
|
|
|
|
printk("Cyclom-Y/ISA found at 0x%lx ",
|
|
|
|
|
(unsigned long) cy_isa_address);
|
|
|
|
|
printk("but no more cards can be used .\n");
|
|
|
|
|
printk("Change NR_CARDS in cyclades.c and recompile kernel.\n");
|
|
|
|
|
return(nboard);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* allocate IRQ */
|
|
|
|
|
if(request_irq(cy_isa_irq, cyy_interrupt,
|
2006-07-02 02:29:33 +00:00
|
|
|
IRQF_DISABLED, "Cyclom-Y", &cy_card[j]))
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
|
|
|
|
printk("Cyclom-Y/ISA found at 0x%lx ",
|
|
|
|
|
(unsigned long) cy_isa_address);
|
|
|
|
|
printk("but could not allocate IRQ#%d.\n",
|
|
|
|
|
cy_isa_irq);
|
|
|
|
|
return(nboard);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* set cy_card */
|
|
|
|
|
cy_card[j].base_addr = cy_isa_address;
|
|
|
|
|
cy_card[j].ctl_addr = NULL;
|
|
|
|
|
cy_card[j].irq = (int) cy_isa_irq;
|
|
|
|
|
cy_card[j].bus_index = 0;
|
|
|
|
|
cy_card[j].first_line = cy_next_channel;
|
|
|
|
|
cy_card[j].num_chips = cy_isa_nchan/4;
|
|
|
|
|
nboard++;
|
|
|
|
|
|
|
|
|
|
/* print message */
|
|
|
|
|
printk("Cyclom-Y/ISA #%d: 0x%lx-0x%lx, IRQ%d, ",
|
|
|
|
|
j+1, (unsigned long) cy_isa_address,
|
|
|
|
|
(unsigned long)(cy_isa_address + (CyISA_Ywin - 1)),
|
|
|
|
|
cy_isa_irq);
|
|
|
|
|
printk("%d channels starting from port %d.\n",
|
|
|
|
|
cy_isa_nchan, cy_next_channel);
|
|
|
|
|
cy_next_channel += cy_isa_nchan;
|
|
|
|
|
}
|
|
|
|
|
return(nboard);
|
|
|
|
|
#else
|
|
|
|
|
return(0);
|
|
|
|
|
#endif /* CONFIG_ISA */
|
|
|
|
|
} /* cy_detect_isa */
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
|
plx_init(void __iomem *addr, uclong initctl)
|
|
|
|
|
{
|
|
|
|
|
/* Reset PLX */
|
|
|
|
|
cy_writel(addr + initctl, cy_readl(addr + initctl) | 0x40000000);
|
|
|
|
|
udelay(100L);
|
|
|
|
|
cy_writel(addr + initctl, cy_readl(addr + initctl) & ~0x40000000);
|
|
|
|
|
|
|
|
|
|
/* Reload Config. Registers from EEPROM */
|
|
|
|
|
cy_writel(addr + initctl, cy_readl(addr + initctl) | 0x20000000);
|
|
|
|
|
udelay(100L);
|
|
|
|
|
cy_writel(addr + initctl, cy_readl(addr + initctl) & ~0x20000000);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* ---------------------------------------------------------------------
|
|
|
|
|
* cy_detect_pci() - Test PCI bus presence and Cyclom-Ye/PCI.
|
|
|
|
|
* sets global variables and return the number of PCI boards found.
|
|
|
|
|
* ---------------------------------------------------------------------
|
|
|
|
|
*/
|
|
|
|
|
static int __init
|
|
|
|
|
cy_detect_pci(void)
|
|
|
|
|
{
|
|
|
|
|
#ifdef CONFIG_PCI
|
|
|
|
|
|
|
|
|
|
struct pci_dev *pdev = NULL;
|
|
|
|
|
unsigned char cyy_rev_id;
|
|
|
|
|
unsigned char cy_pci_irq = 0;
|
|
|
|
|
uclong cy_pci_phys0, cy_pci_phys2;
|
|
|
|
|
void __iomem *cy_pci_addr0, *cy_pci_addr2;
|
|
|
|
|
unsigned short i,j,cy_pci_nchan, plx_ver;
|
|
|
|
|
unsigned short device_id,dev_index = 0;
|
|
|
|
|
uclong mailbox;
|
|
|
|
|
uclong ZeIndex = 0;
|
|
|
|
|
void __iomem *Ze_addr0[NR_CARDS], *Ze_addr2[NR_CARDS];
|
|
|
|
|
uclong Ze_phys0[NR_CARDS], Ze_phys2[NR_CARDS];
|
|
|
|
|
unsigned char Ze_irq[NR_CARDS];
|
|
|
|
|
struct pci_dev *Ze_pdev[NR_CARDS];
|
|
|
|
|
|
|
|
|
|
for (i = 0; i < NR_CARDS; i++) {
|
|
|
|
|
/* look for a Cyclades card by vendor and device id */
|
|
|
|
|
while((device_id = cy_pci_dev_id[dev_index]) != 0) {
|
|
|
|
|
if((pdev = pci_get_device(PCI_VENDOR_ID_CYCLADES,
|
|
|
|
|
device_id, pdev)) == NULL) {
|
|
|
|
|
dev_index++; /* try next device id */
|
|
|
|
|
} else {
|
|
|
|
|
break; /* found a board */
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (device_id == 0)
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
if (pci_enable_device(pdev))
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
/* read PCI configuration area */
|
|
|
|
|
cy_pci_irq = pdev->irq;
|
|
|
|
|
cy_pci_phys0 = pci_resource_start(pdev, 0);
|
|
|
|
|
cy_pci_phys2 = pci_resource_start(pdev, 2);
|
|
|
|
|
pci_read_config_byte(pdev, PCI_REVISION_ID, &cyy_rev_id);
|
|
|
|
|
|
|
|
|
|
device_id &= ~PCI_DEVICE_ID_MASK;
|
|
|
|
|
|
|
|
|
|
if ((device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo)
|
|
|
|
|
|| (device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi)){
|
|
|
|
|
#ifdef CY_PCI_DEBUG
|
|
|
|
|
printk("Cyclom-Y/PCI (bus=0x0%x, pci_id=0x%x, ",
|
|
|
|
|
pdev->bus->number, pdev->devfn);
|
|
|
|
|
printk("rev_id=%d) IRQ%d\n",
|
|
|
|
|
cyy_rev_id, (int)cy_pci_irq);
|
|
|
|
|
printk("Cyclom-Y/PCI:found winaddr=0x%lx ctladdr=0x%lx\n",
|
|
|
|
|
(ulong)cy_pci_phys2, (ulong)cy_pci_phys0);
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
|
|
|
|
|
printk(" Warning: PCI I/O bit incorrectly set. "
|
|
|
|
|
"Ignoring it...\n");
|
|
|
|
|
pdev->resource[2].flags &= ~IORESOURCE_IO;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Although we don't use this I/O region, we should
|
|
|
|
|
request it from the kernel anyway, to avoid problems
|
|
|
|
|
with other drivers accessing it. */
|
|
|
|
|
if (pci_request_regions(pdev, "Cyclom-Y") != 0) {
|
|
|
|
|
printk(KERN_ERR "cyclades: failed to reserve PCI resources\n");
|
|
|
|
|
continue;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
#if defined(__alpha__)
|
|
|
|
|
if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo) { /* below 1M? */
|
|
|
|
|
printk("Cyclom-Y/PCI (bus=0x0%x, pci_id=0x%x, ",
|
|
|
|
|
pdev->bus->number, pdev->devfn);
|
|
|
|
|
printk("rev_id=%d) IRQ%d\n",
|
|
|
|
|
cyy_rev_id, (int)cy_pci_irq);
|
|
|
|
|
printk("Cyclom-Y/PCI:found winaddr=0x%lx ctladdr=0x%lx\n",
|
|
|
|
|
(ulong)cy_pci_phys2, (ulong)cy_pci_phys0);
|
|
|
|
|
printk("Cyclom-Y/PCI not supported for low addresses in "
|
|
|
|
|
"Alpha systems.\n");
|
|
|
|
|
i--;
|
|
|
|
|
continue;
|
|
|
|
|
}
|
|
|
|
|
#endif
|
|
|
|
|
cy_pci_addr0 = ioremap(cy_pci_phys0, CyPCI_Yctl);
|
|
|
|
|
cy_pci_addr2 = ioremap(cy_pci_phys2, CyPCI_Ywin);
|
|
|
|
|
|
|
|
|
|
#ifdef CY_PCI_DEBUG
|
|
|
|
|
printk("Cyclom-Y/PCI: relocate winaddr=0x%lx ctladdr=0x%lx\n",
|
|
|
|
|
(u_long)cy_pci_addr2, (u_long)cy_pci_addr0);
|
|
|
|
|
#endif
|
|
|
|
|
cy_pci_nchan = (unsigned short)(CyPORTS_PER_CHIP *
|
|
|
|
|
cyy_init_card(cy_pci_addr2, 1));
|
|
|
|
|
if(cy_pci_nchan == 0) {
|
|
|
|
|
printk("Cyclom-Y PCI host card with ");
|
|
|
|
|
printk("no Serial-Modules at 0x%lx.\n",
|
|
|
|
|
(ulong) cy_pci_phys2);
|
|
|
|
|
i--;
|
|
|
|
|
continue;
|
|
|
|
|
}
|
|
|
|
|
if((cy_next_channel+cy_pci_nchan) > NR_PORTS) {
|
|
|
|
|
printk("Cyclom-Y/PCI found at 0x%lx ",
|
|
|
|
|
(ulong) cy_pci_phys2);
|
|
|
|
|
printk("but no channels are available.\n");
|
|
|
|
|
printk("Change NR_PORTS in cyclades.c and recompile kernel.\n");
|
|
|
|
|
return(i);
|
|
|
|
|
}
|
|
|
|
|
/* fill the next cy_card structure available */
|
|
|
|
|
for (j = 0 ; j < NR_CARDS ; j++) {
|
|
|
|
|
if (cy_card[j].base_addr == 0) break;
|
|
|
|
|
}
|
|
|
|
|
if (j == NR_CARDS) { /* no more cy_cards available */
|
|
|
|
|
printk("Cyclom-Y/PCI found at 0x%lx ",
|
|
|
|
|
(ulong) cy_pci_phys2);
|
|
|
|
|
printk("but no more cards can be used.\n");
|
|
|
|
|
printk("Change NR_CARDS in cyclades.c and recompile kernel.\n");
|
|
|
|
|
return(i);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* allocate IRQ */
|
|
|
|
|
if(request_irq(cy_pci_irq, cyy_interrupt,
|
2006-07-02 02:29:33 +00:00
|
|
|
IRQF_SHARED, "Cyclom-Y", &cy_card[j]))
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
|
|
|
|
printk("Cyclom-Y/PCI found at 0x%lx ",
|
|
|
|
|
(ulong) cy_pci_phys2);
|
|
|
|
|
printk("but could not allocate IRQ%d.\n",
|
|
|
|
|
cy_pci_irq);
|
|
|
|
|
return(i);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* set cy_card */
|
|
|
|
|
cy_card[j].base_phys = (ulong)cy_pci_phys2;
|
|
|
|
|
cy_card[j].ctl_phys = (ulong)cy_pci_phys0;
|
|
|
|
|
cy_card[j].base_addr = cy_pci_addr2;
|
|
|
|
|
cy_card[j].ctl_addr = cy_pci_addr0;
|
|
|
|
|
cy_card[j].irq = (int) cy_pci_irq;
|
|
|
|
|
cy_card[j].bus_index = 1;
|
|
|
|
|
cy_card[j].first_line = cy_next_channel;
|
|
|
|
|
cy_card[j].num_chips = cy_pci_nchan/4;
|
|
|
|
|
cy_card[j].pdev = pdev;
|
|
|
|
|
|
|
|
|
|
/* enable interrupts in the PCI interface */
|
|
|
|
|
plx_ver = cy_readb(cy_pci_addr2 + CyPLX_VER) & 0x0f;
|
|
|
|
|
switch (plx_ver) {
|
|
|
|
|
case PLX_9050:
|
|
|
|
|
|
|
|
|
|
cy_writeb(cy_pci_addr0+0x4c, 0x43);
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case PLX_9060:
|
|
|
|
|
case PLX_9080:
|
|
|
|
|
default: /* Old boards, use PLX_9060 */
|
|
|
|
|
|
|
|
|
|
plx_init(cy_pci_addr0, 0x6c);
|
|
|
|
|
/* For some yet unknown reason, once the PLX9060 reloads
|
|
|
|
|
the EEPROM, the IRQ is lost and, thus, we have to
|
|
|
|
|
re-write it to the PCI config. registers.
|
|
|
|
|
This will remain here until we find a permanent fix. */
|
|
|
|
|
pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, cy_pci_irq);
|
|
|
|
|
|
|
|
|
|
cy_writew(cy_pci_addr0+0x68,
|
|
|
|
|
cy_readw(cy_pci_addr0+0x68)|0x0900);
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* print message */
|
|
|
|
|
printk("Cyclom-Y/PCI #%d: 0x%lx-0x%lx, IRQ%d, ",
|
|
|
|
|
j+1,
|
|
|
|
|
(ulong)cy_pci_phys2,
|
|
|
|
|
(ulong)(cy_pci_phys2 + CyPCI_Ywin - 1),
|
|
|
|
|
(int)cy_pci_irq);
|
|
|
|
|
printk("%d channels starting from port %d.\n",
|
|
|
|
|
cy_pci_nchan, cy_next_channel);
|
|
|
|
|
|
|
|
|
|
cy_next_channel += cy_pci_nchan;
|
|
|
|
|
}else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Lo){
|
|
|
|
|
/* print message */
|
|
|
|
|
printk("Cyclades-Z/PCI (bus=0x0%x, pci_id=0x%x, ",
|
|
|
|
|
pdev->bus->number, pdev->devfn);
|
|
|
|
|
printk("rev_id=%d) IRQ%d\n",
|
|
|
|
|
cyy_rev_id, (int)cy_pci_irq);
|
|
|
|
|
printk("Cyclades-Z/PCI: found winaddr=0x%lx ctladdr=0x%lx\n",
|
|
|
|
|
(ulong)cy_pci_phys2, (ulong)cy_pci_phys0);
|
|
|
|
|
printk("Cyclades-Z/PCI not supported for low addresses\n");
|
|
|
|
|
break;
|
|
|
|
|
}else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi){
|
|
|
|
|
#ifdef CY_PCI_DEBUG
|
|
|
|
|
printk("Cyclades-Z/PCI (bus=0x0%x, pci_id=0x%x, ",
|
|
|
|
|
pdev->bus->number, pdev->devfn);
|
|
|
|
|
printk("rev_id=%d) IRQ%d\n",
|
|
|
|
|
cyy_rev_id, (int)cy_pci_irq);
|
|
|
|
|
printk("Cyclades-Z/PCI: found winaddr=0x%lx ctladdr=0x%lx\n",
|
|
|
|
|
(ulong)cy_pci_phys2, (ulong)cy_pci_phys0);
|
|
|
|
|
#endif
|
|
|
|
|
cy_pci_addr0 = ioremap(cy_pci_phys0, CyPCI_Zctl);
|
|
|
|
|
|
|
|
|
|
/* Disable interrupts on the PLX before resetting it */
|
|
|
|
|
cy_writew(cy_pci_addr0+0x68,
|
|
|
|
|
cy_readw(cy_pci_addr0+0x68) & ~0x0900);
|
|
|
|
|
|
|
|
|
|
plx_init(cy_pci_addr0, 0x6c);
|
|
|
|
|
/* For some yet unknown reason, once the PLX9060 reloads
|
|
|
|
|
the EEPROM, the IRQ is lost and, thus, we have to
|
|
|
|
|
re-write it to the PCI config. registers.
|
|
|
|
|
This will remain here until we find a permanent fix. */
|
|
|
|
|
pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, cy_pci_irq);
|
|
|
|
|
|
|
|
|
|
mailbox = (uclong)cy_readl(&((struct RUNTIME_9060 __iomem *)
|
|
|
|
|
cy_pci_addr0)->mail_box_0);
|
|
|
|
|
|
|
|
|
|
if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
|
|
|
|
|
printk(" Warning: PCI I/O bit incorrectly set. "
|
|
|
|
|
"Ignoring it...\n");
|
|
|
|
|
pdev->resource[2].flags &= ~IORESOURCE_IO;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Although we don't use this I/O region, we should
|
|
|
|
|
request it from the kernel anyway, to avoid problems
|
|
|
|
|
with other drivers accessing it. */
|
|
|
|
|
if (pci_request_regions(pdev, "Cyclades-Z") != 0) {
|
|
|
|
|
printk(KERN_ERR "cyclades: failed to reserve PCI resources\n");
|
|
|
|
|
continue;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (mailbox == ZE_V1) {
|
|
|
|
|
cy_pci_addr2 = ioremap(cy_pci_phys2, CyPCI_Ze_win);
|
|
|
|
|
if (ZeIndex == NR_CARDS) {
|
|
|
|
|
printk("Cyclades-Ze/PCI found at 0x%lx ",
|
|
|
|
|
(ulong)cy_pci_phys2);
|
|
|
|
|
printk("but no more cards can be used.\n");
|
|
|
|
|
printk("Change NR_CARDS in cyclades.c and recompile kernel.\n");
|
|
|
|
|
} else {
|
|
|
|
|
Ze_phys0[ZeIndex] = cy_pci_phys0;
|
|
|
|
|
Ze_phys2[ZeIndex] = cy_pci_phys2;
|
|
|
|
|
Ze_addr0[ZeIndex] = cy_pci_addr0;
|
|
|
|
|
Ze_addr2[ZeIndex] = cy_pci_addr2;
|
|
|
|
|
Ze_irq[ZeIndex] = cy_pci_irq;
|
|
|
|
|
Ze_pdev[ZeIndex] = pdev;
|
|
|
|
|
ZeIndex++;
|
|
|
|
|
}
|
|
|
|
|
i--;
|
|
|
|
|
continue;
|
|
|
|
|
} else {
|
|
|
|
|
cy_pci_addr2 = ioremap(cy_pci_phys2, CyPCI_Zwin);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
#ifdef CY_PCI_DEBUG
|
|
|
|
|
printk("Cyclades-Z/PCI: relocate winaddr=0x%lx ctladdr=0x%lx\n",
|
|
|
|
|
(ulong)cy_pci_addr2, (ulong)cy_pci_addr0);
|
|
|
|
|
if (mailbox == ZO_V1) {
|
|
|
|
|
cy_writel(&((struct RUNTIME_9060 *)
|
|
|
|
|
(cy_pci_addr0))->loc_addr_base, WIN_CREG);
|
|
|
|
|
PAUSE
|
|
|
|
|
printk("Cyclades-8Zo/PCI: FPGA id %lx, ver %lx\n",
|
|
|
|
|
(ulong)(0xff & cy_readl(&((struct CUSTOM_REG *)
|
|
|
|
|
(cy_pci_addr2))->fpga_id)),
|
|
|
|
|
(ulong)(0xff & cy_readl(&((struct CUSTOM_REG *)
|
|
|
|
|
(cy_pci_addr2))->fpga_version)));
|
|
|
|
|
cy_writel(&((struct RUNTIME_9060 *)
|
|
|
|
|
(cy_pci_addr0))->loc_addr_base, WIN_RAM);
|
|
|
|
|
} else {
|
|
|
|
|
printk("Cyclades-Z/PCI: New Cyclades-Z board. FPGA not loaded\n");
|
|
|
|
|
}
|
|
|
|
|
#endif
|
|
|
|
|
/* The following clears the firmware id word. This ensures
|
|
|
|
|
that the driver will not attempt to talk to the board
|
|
|
|
|
until it has been properly initialized.
|
|
|
|
|
*/
|
|
|
|
|
PAUSE
|
|
|
|
|
if ((mailbox == ZO_V1) || (mailbox == ZO_V2))
|
|
|
|
|
cy_writel(cy_pci_addr2 + ID_ADDRESS, 0L);
|
|
|
|
|
|
|
|
|
|
/* This must be a Cyclades-8Zo/PCI. The extendable
|
|
|
|
|
version will have a different device_id and will
|
|
|
|
|
be allocated its maximum number of ports. */
|
|
|
|
|
cy_pci_nchan = 8;
|
|
|
|
|
|
|
|
|
|
if((cy_next_channel+cy_pci_nchan) > NR_PORTS) {
|
|
|
|
|
printk("Cyclades-8Zo/PCI found at 0x%lx ",
|
|
|
|
|
(ulong)cy_pci_phys2);
|
|
|
|
|
printk("but no channels are available.\n");
|
|
|
|
|
printk("Change NR_PORTS in cyclades.c and recompile kernel.\n");
|
|
|
|
|
return(i);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* fill the next cy_card structure available */
|
|
|
|
|
for (j = 0 ; j < NR_CARDS ; j++) {
|
|
|
|
|
if (cy_card[j].base_addr == 0) break;
|
|
|
|
|
}
|
|
|
|
|
if (j == NR_CARDS) { /* no more cy_cards available */
|
|
|
|
|
printk("Cyclades-8Zo/PCI found at 0x%lx ",
|
|
|
|
|
(ulong)cy_pci_phys2);
|
|
|
|
|
printk("but no more cards can be used.\n");
|
|
|
|
|
printk("Change NR_CARDS in cyclades.c and recompile kernel.\n");
|
|
|
|
|
return(i);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
#ifdef CONFIG_CYZ_INTR
|
|
|
|
|
/* allocate IRQ only if board has an IRQ */
|
|
|
|
|
if( (cy_pci_irq != 0) && (cy_pci_irq != 255) ) {
|
|
|
|
|
if(request_irq(cy_pci_irq, cyz_interrupt,
|
2006-07-02 02:29:33 +00:00
|
|
|
IRQF_SHARED, "Cyclades-Z", &cy_card[j]))
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
|
|
|
|
printk("Cyclom-8Zo/PCI found at 0x%lx ",
|
|
|
|
|
(ulong) cy_pci_phys2);
|
|
|
|
|
printk("but could not allocate IRQ%d.\n",
|
|
|
|
|
cy_pci_irq);
|
|
|
|
|
return(i);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
#endif /* CONFIG_CYZ_INTR */
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/* set cy_card */
|
|
|
|
|
cy_card[j].base_phys = cy_pci_phys2;
|
|
|
|
|
cy_card[j].ctl_phys = cy_pci_phys0;
|
|
|
|
|
cy_card[j].base_addr = cy_pci_addr2;
|
|
|
|
|
cy_card[j].ctl_addr = cy_pci_addr0;
|
|
|
|
|
cy_card[j].irq = (int) cy_pci_irq;
|
|
|
|
|
cy_card[j].bus_index = 1;
|
|
|
|
|
cy_card[j].first_line = cy_next_channel;
|
|
|
|
|
cy_card[j].num_chips = -1;
|
|
|
|
|
cy_card[j].pdev = pdev;
|
|
|
|
|
|
|
|
|
|
/* print message */
|
|
|
|
|
#ifdef CONFIG_CYZ_INTR
|
|
|
|
|
/* don't report IRQ if board is no IRQ */
|
|
|
|
|
if( (cy_pci_irq != 0) && (cy_pci_irq != 255) )
|
|
|
|
|
printk("Cyclades-8Zo/PCI #%d: 0x%lx-0x%lx, IRQ%d, ",
|
|
|
|
|
j+1,(ulong)cy_pci_phys2,
|
|
|
|
|
(ulong)(cy_pci_phys2 + CyPCI_Zwin - 1),
|
|
|
|
|
(int)cy_pci_irq);
|
|
|
|
|
else
|
|
|
|
|
#endif /* CONFIG_CYZ_INTR */
|
|
|
|
|
printk("Cyclades-8Zo/PCI #%d: 0x%lx-0x%lx, ",
|
|
|
|
|
j+1,(ulong)cy_pci_phys2,
|
|
|
|
|
(ulong)(cy_pci_phys2 + CyPCI_Zwin - 1));
|
|
|
|
|
|
|
|
|
|
printk("%d channels starting from port %d.\n",
|
|
|
|
|
cy_pci_nchan,cy_next_channel);
|
|
|
|
|
cy_next_channel += cy_pci_nchan;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
for (; ZeIndex != 0 && i < NR_CARDS; i++) {
|
|
|
|
|
cy_pci_phys0 = Ze_phys0[0];
|
|
|
|
|
cy_pci_phys2 = Ze_phys2[0];
|
|
|
|
|
cy_pci_addr0 = Ze_addr0[0];
|
|
|
|
|
cy_pci_addr2 = Ze_addr2[0];
|
|
|
|
|
cy_pci_irq = Ze_irq[0];
|
|
|
|
|
pdev = Ze_pdev[0];
|
|
|
|
|
for (j = 0 ; j < ZeIndex-1 ; j++) {
|
|
|
|
|
Ze_phys0[j] = Ze_phys0[j+1];
|
|
|
|
|
Ze_phys2[j] = Ze_phys2[j+1];
|
|
|
|
|
Ze_addr0[j] = Ze_addr0[j+1];
|
|
|
|
|
Ze_addr2[j] = Ze_addr2[j+1];
|
|
|
|
|
Ze_irq[j] = Ze_irq[j+1];
|
|
|
|
|
Ze_pdev[j] = Ze_pdev[j+1];
|
|
|
|
|
}
|
|
|
|
|
ZeIndex--;
|
|
|
|
|
mailbox = (uclong)cy_readl(&((struct RUNTIME_9060 __iomem *)
|
|
|
|
|
cy_pci_addr0)->mail_box_0);
|
|
|
|
|
#ifdef CY_PCI_DEBUG
|
|
|
|
|
printk("Cyclades-Z/PCI: relocate winaddr=0x%lx ctladdr=0x%lx\n",
|
|
|
|
|
(ulong)cy_pci_addr2, (ulong)cy_pci_addr0);
|
|
|
|
|
printk("Cyclades-Z/PCI: New Cyclades-Z board. FPGA not loaded\n");
|
|
|
|
|
#endif
|
|
|
|
|
PAUSE
|
|
|
|
|
/* This must be the new Cyclades-Ze/PCI. */
|
|
|
|
|
cy_pci_nchan = ZE_V1_NPORTS;
|
|
|
|
|
|
|
|
|
|
if((cy_next_channel+cy_pci_nchan) > NR_PORTS) {
|
|
|
|
|
printk("Cyclades-Ze/PCI found at 0x%lx ",
|
|
|
|
|
(ulong)cy_pci_phys2);
|
|
|
|
|
printk("but no channels are available.\n");
|
|
|
|
|
printk("Change NR_PORTS in cyclades.c and recompile kernel.\n");
|
|
|
|
|
return(i);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* fill the next cy_card structure available */
|
|
|
|
|
for (j = 0 ; j < NR_CARDS ; j++) {
|
|
|
|
|
if (cy_card[j].base_addr == 0) break;
|
|
|
|
|
}
|
|
|
|
|
if (j == NR_CARDS) { /* no more cy_cards available */
|
|
|
|
|
printk("Cyclades-Ze/PCI found at 0x%lx ",
|
|
|
|
|
(ulong)cy_pci_phys2);
|
|
|
|
|
printk("but no more cards can be used.\n");
|
|
|
|
|
printk("Change NR_CARDS in cyclades.c and recompile kernel.\n");
|
|
|
|
|
return(i);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
#ifdef CONFIG_CYZ_INTR
|
|
|
|
|
/* allocate IRQ only if board has an IRQ */
|
|
|
|
|
if( (cy_pci_irq != 0) && (cy_pci_irq != 255) ) {
|
|
|
|
|
if(request_irq(cy_pci_irq, cyz_interrupt,
|
2006-07-02 02:29:33 +00:00
|
|
|
IRQF_SHARED, "Cyclades-Z", &cy_card[j]))
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
|
|
|
|
printk("Cyclom-Ze/PCI found at 0x%lx ",
|
|
|
|
|
(ulong) cy_pci_phys2);
|
|
|
|
|
printk("but could not allocate IRQ%d.\n",
|
|
|
|
|
cy_pci_irq);
|
|
|
|
|
return(i);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
#endif /* CONFIG_CYZ_INTR */
|
|
|
|
|
|
|
|
|
|
/* set cy_card */
|
|
|
|
|
cy_card[j].base_phys = cy_pci_phys2;
|
|
|
|
|
cy_card[j].ctl_phys = cy_pci_phys0;
|
|
|
|
|
cy_card[j].base_addr = cy_pci_addr2;
|
|
|
|
|
cy_card[j].ctl_addr = cy_pci_addr0;
|
|
|
|
|
cy_card[j].irq = (int) cy_pci_irq;
|
|
|
|
|
cy_card[j].bus_index = 1;
|
|
|
|
|
cy_card[j].first_line = cy_next_channel;
|
|
|
|
|
cy_card[j].num_chips = -1;
|
|
|
|
|
cy_card[j].pdev = pdev;
|
|
|
|
|
|
|
|
|
|
/* print message */
|
|
|
|
|
#ifdef CONFIG_CYZ_INTR
|
|
|
|
|
/* don't report IRQ if board is no IRQ */
|
|
|
|
|
if( (cy_pci_irq != 0) && (cy_pci_irq != 255) )
|
|
|
|
|
printk("Cyclades-Ze/PCI #%d: 0x%lx-0x%lx, IRQ%d, ",
|
|
|
|
|
j+1,(ulong)cy_pci_phys2,
|
|
|
|
|
(ulong)(cy_pci_phys2 + CyPCI_Ze_win - 1),
|
|
|
|
|
(int)cy_pci_irq);
|
|
|
|
|
else
|
|
|
|
|
#endif /* CONFIG_CYZ_INTR */
|
|
|
|
|
printk("Cyclades-Ze/PCI #%d: 0x%lx-0x%lx, ",
|
|
|
|
|
j+1,(ulong)cy_pci_phys2,
|
|
|
|
|
(ulong)(cy_pci_phys2 + CyPCI_Ze_win - 1));
|
|
|
|
|
|
|
|
|
|
printk("%d channels starting from port %d.\n",
|
|
|
|
|
cy_pci_nchan,cy_next_channel);
|
|
|
|
|
cy_next_channel += cy_pci_nchan;
|
|
|
|
|
}
|
|
|
|
|
if (ZeIndex != 0) {
|
|
|
|
|
printk("Cyclades-Ze/PCI found at 0x%x ",
|
|
|
|
|
(unsigned int) Ze_phys2[0]);
|
|
|
|
|
printk("but no more cards can be used.\n");
|
|
|
|
|
printk("Change NR_CARDS in cyclades.c and recompile kernel.\n");
|
|
|
|
|
}
|
|
|
|
|
return(i);
|
|
|
|
|
#else
|
|
|
|
|
return(0);
|
|
|
|
|
#endif /* ifdef CONFIG_PCI */
|
|
|
|
|
} /* cy_detect_pci */
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* This routine prints out the appropriate serial driver version number
|
|
|
|
|
* and identifies which options were configured into this driver.
|
|
|
|
|
*/
|
|
|
|
|
static inline void
|
|
|
|
|
show_version(void)
|
|
|
|
|
{
|
|
|
|
|
char *rcsvers, *rcsdate, *tmp;
|
|
|
|
|
rcsvers = strchr(rcsid, ' '); rcsvers++;
|
|
|
|
|
tmp = strchr(rcsvers, ' '); *tmp++ = '\0';
|
|
|
|
|
rcsdate = strchr(tmp, ' '); rcsdate++;
|
|
|
|
|
tmp = strrchr(rcsdate, ' '); *tmp = '\0';
|
|
|
|
|
printk("Cyclades driver %s %s\n",
|
|
|
|
|
rcsvers, rcsdate);
|
|
|
|
|
printk(" built %s %s\n",
|
|
|
|
|
__DATE__, __TIME__);
|
|
|
|
|
} /* show_version */
|
|
|
|
|
|
|
|
|
|
static int
|
|
|
|
|
cyclades_get_proc_info(char *buf, char **start, off_t offset, int length,
|
|
|
|
|
int *eof, void *data)
|
|
|
|
|
{
|
|
|
|
|
struct cyclades_port *info;
|
|
|
|
|
int i;
|
|
|
|
|
int len=0;
|
|
|
|
|
off_t begin=0;
|
|
|
|
|
off_t pos=0;
|
|
|
|
|
int size;
|
|
|
|
|
__u32 cur_jifs = jiffies;
|
|
|
|
|
|
|
|
|
|
size = sprintf(buf, "Dev TimeOpen BytesOut IdleOut BytesIn IdleIn Overruns Ldisc\n");
|
|
|
|
|
|
|
|
|
|
pos += size;
|
|
|
|
|
len += size;
|
|
|
|
|
|
|
|
|
|
/* Output one line for each known port */
|
|
|
|
|
for (i = 0; i < NR_PORTS && cy_port[i].line >= 0; i++) {
|
|
|
|
|
info = &cy_port[i];
|
|
|
|
|
|
|
|
|
|
if (info->count)
|
|
|
|
|
size = sprintf(buf+len,
|
|
|
|
|
"%3d %8lu %10lu %8lu %10lu %8lu %9lu %6ld\n",
|
|
|
|
|
info->line,
|
|
|
|
|
JIFFIES_DIFF(info->idle_stats.in_use, cur_jifs) / HZ,
|
|
|
|
|
info->idle_stats.xmit_bytes,
|
|
|
|
|
JIFFIES_DIFF(info->idle_stats.xmit_idle, cur_jifs) / HZ,
|
|
|
|
|
info->idle_stats.recv_bytes,
|
|
|
|
|
JIFFIES_DIFF(info->idle_stats.recv_idle, cur_jifs) / HZ,
|
|
|
|
|
info->idle_stats.overruns,
|
|
|
|
|
(long) info->tty->ldisc.num);
|
|
|
|
|
else
|
|
|
|
|
size = sprintf(buf+len,
|
|
|
|
|
"%3d %8lu %10lu %8lu %10lu %8lu %9lu %6ld\n",
|
|
|
|
|
info->line, 0L, 0L, 0L, 0L, 0L, 0L, 0L);
|
|
|
|
|
len += size;
|
|
|
|
|
pos = begin + len;
|
|
|
|
|
|
|
|
|
|
if (pos < offset) {
|
|
|
|
|
len = 0;
|
|
|
|
|
begin = pos;
|
|
|
|
|
}
|
|
|
|
|
if (pos > offset + length)
|
|
|
|
|
goto done;
|
|
|
|
|
}
|
|
|
|
|
*eof = 1;
|
|
|
|
|
done:
|
|
|
|
|
*start = buf + (offset - begin); /* Start of wanted data */
|
|
|
|
|
len -= (offset - begin); /* Start slop */
|
|
|
|
|
if (len > length)
|
|
|
|
|
len = length; /* Ending slop */
|
|
|
|
|
if (len < 0)
|
|
|
|
|
len = 0;
|
|
|
|
|
return len;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* The serial driver boot-time initialization code!
|
|
|
|
|
Hardware I/O ports are mapped to character special devices on a
|
|
|
|
|
first found, first allocated manner. That is, this code searches
|
|
|
|
|
for Cyclom cards in the system. As each is found, it is probed
|
|
|
|
|
to discover how many chips (and thus how many ports) are present.
|
|
|
|
|
These ports are mapped to the tty ports 32 and upward in monotonic
|
|
|
|
|
fashion. If an 8-port card is replaced with a 16-port card, the
|
|
|
|
|
port mapping on a following card will shift.
|
|
|
|
|
|
|
|
|
|
This approach is different from what is used in the other serial
|
|
|
|
|
device driver because the Cyclom is more properly a multiplexer,
|
|
|
|
|
not just an aggregation of serial ports on one card.
|
|
|
|
|
|
|
|
|
|
If there are more cards with more ports than have been
|
|
|
|
|
statically allocated above, a warning is printed and the
|
|
|
|
|
extra ports are ignored.
|
|
|
|
|
*/
|
|
|
|
|
|
2006-10-02 09:17:18 +00:00
|
|
|
static const struct tty_operations cy_ops = {
|
2005-04-16 22:20:36 +00:00
|
|
|
.open = cy_open,
|
|
|
|
|
.close = cy_close,
|
|
|
|
|
.write = cy_write,
|
|
|
|
|
.put_char = cy_put_char,
|
|
|
|
|
.flush_chars = cy_flush_chars,
|
|
|
|
|
.write_room = cy_write_room,
|
|
|
|
|
.chars_in_buffer = cy_chars_in_buffer,
|
|
|
|
|
.flush_buffer = cy_flush_buffer,
|
|
|
|
|
.ioctl = cy_ioctl,
|
|
|
|
|
.throttle = cy_throttle,
|
|
|
|
|
.unthrottle = cy_unthrottle,
|
|
|
|
|
.set_termios = cy_set_termios,
|
|
|
|
|
.stop = cy_stop,
|
|
|
|
|
.start = cy_start,
|
|
|
|
|
.hangup = cy_hangup,
|
|
|
|
|
.break_ctl = cy_break,
|
|
|
|
|
.wait_until_sent = cy_wait_until_sent,
|
|
|
|
|
.read_proc = cyclades_get_proc_info,
|
|
|
|
|
.tiocmget = cy_tiocmget,
|
|
|
|
|
.tiocmset = cy_tiocmset,
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
static int __init
|
|
|
|
|
cy_init(void)
|
|
|
|
|
{
|
|
|
|
|
struct cyclades_port *info;
|
|
|
|
|
struct cyclades_card *cinfo;
|
|
|
|
|
int number_z_boards = 0;
|
|
|
|
|
int board,port,i,index;
|
|
|
|
|
unsigned long mailbox;
|
|
|
|
|
unsigned short chip_number;
|
|
|
|
|
int nports;
|
|
|
|
|
|
|
|
|
|
cy_serial_driver = alloc_tty_driver(NR_PORTS);
|
|
|
|
|
if (!cy_serial_driver)
|
|
|
|
|
return -ENOMEM;
|
|
|
|
|
show_version();
|
|
|
|
|
|
|
|
|
|
/* Initialize the tty_driver structure */
|
|
|
|
|
|
|
|
|
|
cy_serial_driver->owner = THIS_MODULE;
|
|
|
|
|
cy_serial_driver->driver_name = "cyclades";
|
|
|
|
|
cy_serial_driver->name = "ttyC";
|
|
|
|
|
cy_serial_driver->major = CYCLADES_MAJOR;
|
|
|
|
|
cy_serial_driver->minor_start = 0;
|
|
|
|
|
cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
|
|
|
|
|
cy_serial_driver->subtype = SERIAL_TYPE_NORMAL;
|
|
|
|
|
cy_serial_driver->init_termios = tty_std_termios;
|
|
|
|
|
cy_serial_driver->init_termios.c_cflag =
|
|
|
|
|
B9600 | CS8 | CREAD | HUPCL | CLOCAL;
|
|
|
|
|
cy_serial_driver->flags = TTY_DRIVER_REAL_RAW;
|
|
|
|
|
tty_set_operations(cy_serial_driver, &cy_ops);
|
|
|
|
|
|
|
|
|
|
if (tty_register_driver(cy_serial_driver))
|
|
|
|
|
panic("Couldn't register Cyclades serial driver\n");
|
|
|
|
|
|
|
|
|
|
for (i = 0; i < NR_CARDS; i++) {
|
|
|
|
|
/* base_addr=0 indicates board not found */
|
|
|
|
|
cy_card[i].base_addr = NULL;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* the code below is responsible to find the boards. Each different
|
|
|
|
|
type of board has its own detection routine. If a board is found,
|
|
|
|
|
the next cy_card structure available is set by the detection
|
|
|
|
|
routine. These functions are responsible for checking the
|
|
|
|
|
availability of cy_card and cy_port data structures and updating
|
|
|
|
|
the cy_next_channel. */
|
|
|
|
|
|
|
|
|
|
/* look for isa boards */
|
|
|
|
|
cy_isa_nboard = cy_detect_isa();
|
|
|
|
|
|
|
|
|
|
/* look for pci boards */
|
|
|
|
|
cy_pci_nboard = cy_detect_pci();
|
|
|
|
|
|
|
|
|
|
cy_nboard = cy_isa_nboard + cy_pci_nboard;
|
|
|
|
|
|
|
|
|
|
/* invalidate remaining cy_card structures */
|
|
|
|
|
for (i = 0 ; i < NR_CARDS ; i++) {
|
|
|
|
|
if (cy_card[i].base_addr == 0) {
|
|
|
|
|
cy_card[i].first_line = -1;
|
|
|
|
|
cy_card[i].ctl_addr = NULL;
|
|
|
|
|
cy_card[i].irq = 0;
|
|
|
|
|
cy_card[i].bus_index = 0;
|
|
|
|
|
cy_card[i].first_line = 0;
|
|
|
|
|
cy_card[i].num_chips = 0;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
/* invalidate remaining cy_port structures */
|
|
|
|
|
for (i = cy_next_channel ; i < NR_PORTS ; i++) {
|
|
|
|
|
cy_port[i].line = -1;
|
|
|
|
|
cy_port[i].magic = -1;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* initialize per-port data structures for each valid board found */
|
|
|
|
|
for (board = 0 ; board < cy_nboard ; board++) {
|
|
|
|
|
cinfo = &cy_card[board];
|
|
|
|
|
if (cinfo->num_chips == -1) { /* Cyclades-Z */
|
|
|
|
|
number_z_boards++;
|
|
|
|
|
mailbox = cy_readl(&((struct RUNTIME_9060 __iomem *)
|
|
|
|
|
cy_card[board].ctl_addr)->mail_box_0);
|
|
|
|
|
nports = (mailbox == ZE_V1) ? ZE_V1_NPORTS : 8;
|
|
|
|
|
cinfo->intr_enabled = 0;
|
|
|
|
|
cinfo->nports = 0; /* Will be correctly set later, after
|
|
|
|
|
Z FW is loaded */
|
|
|
|
|
spin_lock_init(&cinfo->card_lock);
|
|
|
|
|
for (port = cinfo->first_line ;
|
|
|
|
|
port < cinfo->first_line + nports;
|
|
|
|
|
port++)
|
|
|
|
|
{
|
|
|
|
|
info = &cy_port[port];
|
|
|
|
|
info->magic = CYCLADES_MAGIC;
|
|
|
|
|
info->type = PORT_STARTECH;
|
|
|
|
|
info->card = board;
|
|
|
|
|
info->line = port;
|
|
|
|
|
info->chip_rev = 0;
|
|
|
|
|
info->flags = STD_COM_FLAGS;
|
|
|
|
|
info->tty = NULL;
|
|
|
|
|
if (mailbox == ZO_V1)
|
|
|
|
|
info->xmit_fifo_size = CYZ_FIFO_SIZE;
|
|
|
|
|
else
|
|
|
|
|
info->xmit_fifo_size = 4 * CYZ_FIFO_SIZE;
|
|
|
|
|
info->cor1 = 0;
|
|
|
|
|
info->cor2 = 0;
|
|
|
|
|
info->cor3 = 0;
|
|
|
|
|
info->cor4 = 0;
|
|
|
|
|
info->cor5 = 0;
|
|
|
|
|
info->tbpr = 0;
|
|
|
|
|
info->tco = 0;
|
|
|
|
|
info->rbpr = 0;
|
|
|
|
|
info->rco = 0;
|
|
|
|
|
info->custom_divisor = 0;
|
|
|
|
|
info->close_delay = 5*HZ/10;
|
|
|
|
|
info->closing_wait = CLOSING_WAIT_DELAY;
|
|
|
|
|
info->icount.cts = info->icount.dsr =
|
|
|
|
|
info->icount.rng = info->icount.dcd = 0;
|
|
|
|
|
info->icount.rx = info->icount.tx = 0;
|
|
|
|
|
info->icount.frame = info->icount.parity = 0;
|
|
|
|
|
info->icount.overrun = info->icount.brk = 0;
|
|
|
|
|
info->x_char = 0;
|
|
|
|
|
info->event = 0;
|
|
|
|
|
info->count = 0;
|
|
|
|
|
info->blocked_open = 0;
|
|
|
|
|
info->default_threshold = 0;
|
|
|
|
|
info->default_timeout = 0;
|
|
|
|
|
INIT_WORK(&info->tqueue, do_softint, info);
|
|
|
|
|
init_waitqueue_head(&info->open_wait);
|
|
|
|
|
init_waitqueue_head(&info->close_wait);
|
|
|
|
|
init_waitqueue_head(&info->shutdown_wait);
|
|
|
|
|
init_waitqueue_head(&info->delta_msr_wait);
|
|
|
|
|
/* info->session */
|
|
|
|
|
/* info->pgrp */
|
|
|
|
|
info->read_status_mask = 0;
|
|
|
|
|
/* info->timeout */
|
|
|
|
|
/* Bentson's vars */
|
|
|
|
|
info->jiffies[0] = 0;
|
|
|
|
|
info->jiffies[1] = 0;
|
|
|
|
|
info->jiffies[2] = 0;
|
|
|
|
|
info->rflush_count = 0;
|
|
|
|
|
#ifdef CONFIG_CYZ_INTR
|
|
|
|
|
init_timer(&cyz_rx_full_timer[port]);
|
|
|
|
|
cyz_rx_full_timer[port].function = NULL;
|
|
|
|
|
#endif
|
|
|
|
|
}
|
|
|
|
|
continue;
|
|
|
|
|
}else{ /* Cyclom-Y of some kind*/
|
|
|
|
|
index = cinfo->bus_index;
|
|
|
|
|
spin_lock_init(&cinfo->card_lock);
|
|
|
|
|
cinfo->nports = CyPORTS_PER_CHIP * cinfo->num_chips;
|
|
|
|
|
for (port = cinfo->first_line ;
|
|
|
|
|
port < cinfo->first_line + cinfo->nports ;
|
|
|
|
|
port++)
|
|
|
|
|
{
|
|
|
|
|
info = &cy_port[port];
|
|
|
|
|
info->magic = CYCLADES_MAGIC;
|
|
|
|
|
info->type = PORT_CIRRUS;
|
|
|
|
|
info->card = board;
|
|
|
|
|
info->line = port;
|
|
|
|
|
info->flags = STD_COM_FLAGS;
|
|
|
|
|
info->tty = NULL;
|
|
|
|
|
info->xmit_fifo_size = CyMAX_CHAR_FIFO;
|
|
|
|
|
info->cor1 = CyPARITY_NONE|Cy_1_STOP|Cy_8_BITS;
|
|
|
|
|
info->cor2 = CyETC;
|
|
|
|
|
info->cor3 = 0x08; /* _very_ small rcv threshold */
|
|
|
|
|
info->cor4 = 0;
|
|
|
|
|
info->cor5 = 0;
|
|
|
|
|
info->custom_divisor = 0;
|
|
|
|
|
info->close_delay = 5*HZ/10;
|
|
|
|
|
info->closing_wait = CLOSING_WAIT_DELAY;
|
|
|
|
|
info->icount.cts = info->icount.dsr =
|
|
|
|
|
info->icount.rng = info->icount.dcd = 0;
|
|
|
|
|
info->icount.rx = info->icount.tx = 0;
|
|
|
|
|
info->icount.frame = info->icount.parity = 0;
|
|
|
|
|
info->icount.overrun = info->icount.brk = 0;
|
|
|
|
|
chip_number = (port - cinfo->first_line) / 4;
|
|
|
|
|
if ((info->chip_rev =
|
|
|
|
|
cy_readb(cinfo->base_addr +
|
|
|
|
|
(cy_chip_offset[chip_number]<<index) +
|
|
|
|
|
(CyGFRCR<<index))) >= CD1400_REV_J) {
|
|
|
|
|
/* It is a CD1400 rev. J or later */
|
|
|
|
|
info->tbpr = baud_bpr_60[13]; /* Tx BPR */
|
|
|
|
|
info->tco = baud_co_60[13]; /* Tx CO */
|
|
|
|
|
info->rbpr = baud_bpr_60[13]; /* Rx BPR */
|
|
|
|
|
info->rco = baud_co_60[13]; /* Rx CO */
|
|
|
|
|
info->rflow = 0;
|
|
|
|
|
info->rtsdtr_inv = 1;
|
|
|
|
|
} else {
|
|
|
|
|
info->tbpr = baud_bpr_25[13]; /* Tx BPR */
|
|
|
|
|
info->tco = baud_co_25[13]; /* Tx CO */
|
|
|
|
|
info->rbpr = baud_bpr_25[13]; /* Rx BPR */
|
|
|
|
|
info->rco = baud_co_25[13]; /* Rx CO */
|
|
|
|
|
info->rflow = 0;
|
|
|
|
|
info->rtsdtr_inv = 0;
|
|
|
|
|
}
|
|
|
|
|
info->x_char = 0;
|
|
|
|
|
info->event = 0;
|
|
|
|
|
info->count = 0;
|
|
|
|
|
info->blocked_open = 0;
|
|
|
|
|
info->default_threshold = 0;
|
|
|
|
|
info->default_timeout = 0;
|
|
|
|
|
INIT_WORK(&info->tqueue, do_softint, info);
|
|
|
|
|
init_waitqueue_head(&info->open_wait);
|
|
|
|
|
init_waitqueue_head(&info->close_wait);
|
|
|
|
|
init_waitqueue_head(&info->shutdown_wait);
|
|
|
|
|
init_waitqueue_head(&info->delta_msr_wait);
|
|
|
|
|
/* info->session */
|
|
|
|
|
/* info->pgrp */
|
|
|
|
|
info->read_status_mask =
|
|
|
|
|
CyTIMEOUT| CySPECHAR| CyBREAK
|
|
|
|
|
| CyPARITY| CyFRAME| CyOVERRUN;
|
|
|
|
|
/* info->timeout */
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
#ifndef CONFIG_CYZ_INTR
|
|
|
|
|
if (number_z_boards && !cyz_timeron){
|
|
|
|
|
cyz_timeron++;
|
|
|
|
|
cyz_timerlist.expires = jiffies + 1;
|
|
|
|
|
add_timer(&cyz_timerlist);
|
|
|
|
|
#ifdef CY_PCI_DEBUG
|
|
|
|
|
printk("Cyclades-Z polling initialized\n");
|
|
|
|
|
#endif
|
|
|
|
|
}
|
|
|
|
|
#endif /* CONFIG_CYZ_INTR */
|
|
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
|
|
} /* cy_init */
|
|
|
|
|
|
|
|
|
|
static void __exit
|
|
|
|
|
cy_cleanup_module(void)
|
|
|
|
|
{
|
|
|
|
|
int i, e1;
|
|
|
|
|
|
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#ifndef CONFIG_CYZ_INTR
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if (cyz_timeron){
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cyz_timeron = 0;
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del_timer(&cyz_timerlist);
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}
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#endif /* CONFIG_CYZ_INTR */
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if ((e1 = tty_unregister_driver(cy_serial_driver)))
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printk("cyc: failed to unregister Cyclades serial driver(%d)\n",
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e1);
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put_tty_driver(cy_serial_driver);
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for (i = 0; i < NR_CARDS; i++) {
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if (cy_card[i].base_addr) {
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iounmap(cy_card[i].base_addr);
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if (cy_card[i].ctl_addr)
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iounmap(cy_card[i].ctl_addr);
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if (cy_card[i].irq
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#ifndef CONFIG_CYZ_INTR
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&& cy_card[i].num_chips != -1 /* not a Z card */
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#endif /* CONFIG_CYZ_INTR */
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)
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free_irq(cy_card[i].irq, &cy_card[i]);
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#ifdef CONFIG_PCI
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if (cy_card[i].pdev)
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pci_release_regions(cy_card[i].pdev);
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#endif
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}
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}
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} /* cy_cleanup_module */
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module_init(cy_init);
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module_exit(cy_cleanup_module);
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MODULE_LICENSE("GPL");
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