1048 lines
28 KiB
C
1048 lines
28 KiB
C
/*
|
||
* de620.c $Revision: 1.40 $ BETA
|
||
*
|
||
*
|
||
* Linux driver for the D-Link DE-620 Ethernet pocket adapter.
|
||
*
|
||
* Portions (C) Copyright 1993, 1994 by Bjorn Ekwall <bj0rn@blox.se>
|
||
*
|
||
* Based on adapter information gathered from DOS packetdriver
|
||
* sources from D-Link Inc: (Special thanks to Henry Ngai of D-Link.)
|
||
* Portions (C) Copyright D-Link SYSTEM Inc. 1991, 1992
|
||
* Copyright, 1988, Russell Nelson, Crynwr Software
|
||
*
|
||
* Adapted to the sample network driver core for linux,
|
||
* written by: Donald Becker <becker@super.org>
|
||
* (Now at <becker@scyld.com>)
|
||
*
|
||
* Valuable assistance from:
|
||
* J. Joshua Kopper <kopper@rtsg.mot.com>
|
||
* Olav Kvittem <Olav.Kvittem@uninett.no>
|
||
* Germano Caronni <caronni@nessie.cs.id.ethz.ch>
|
||
* Jeremy Fitzhardinge <jeremy@suite.sw.oz.au>
|
||
*
|
||
*****************************************************************************/
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||
/*
|
||
* This program is free software; you can redistribute it and/or modify
|
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* it under the terms of the GNU General Public License as published by
|
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
|
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
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* GNU General Public License for more details.
|
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*
|
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
|
||
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
||
*
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||
*****************************************************************************/
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||
static const char version[] =
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||
"de620.c: $Revision: 1.40 $, Bjorn Ekwall <bj0rn@blox.se>\n";
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||
|
||
/***********************************************************************
|
||
*
|
||
* "Tuning" section.
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*
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||
* Compile-time options: (see below for descriptions)
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* -DDE620_IO=0x378 (lpt1)
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||
* -DDE620_IRQ=7 (lpt1)
|
||
* -DDE602_DEBUG=...
|
||
* -DSHUTDOWN_WHEN_LOST
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||
* -DCOUNT_LOOPS
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||
* -DLOWSPEED
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||
* -DREAD_DELAY
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||
* -DWRITE_DELAY
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||
*/
|
||
|
||
/*
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||
* This driver assumes that the printer port is a "normal",
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* dumb, uni-directional port!
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* If your port is "fancy" in any way, please try to set it to "normal"
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* with your BIOS setup. I have no access to machines with bi-directional
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||
* ports, so I can't test such a driver :-(
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* (Yes, I _know_ it is possible to use DE620 with bidirectional ports...)
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||
*
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||
* There are some clones of DE620 out there, with different names.
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* If the current driver does not recognize a clone, try to change
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* the following #define to:
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*
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* #define DE620_CLONE 1
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||
*/
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#define DE620_CLONE 0
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/*
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* If the adapter has problems with high speeds, enable this #define
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* otherwise full printerport speed will be attempted.
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*
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* You can tune the READ_DELAY/WRITE_DELAY below if you enable LOWSPEED
|
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*
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#define LOWSPEED
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||
*/
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||
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#ifndef READ_DELAY
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#define READ_DELAY 100 /* adapter internal read delay in 100ns units */
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#endif
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||
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#ifndef WRITE_DELAY
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#define WRITE_DELAY 100 /* adapter internal write delay in 100ns units */
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||
#endif
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||
|
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/*
|
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* Enable this #define if you want the adapter to do a "ifconfig down" on
|
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* itself when we have detected that something is possibly wrong with it.
|
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* The default behaviour is to retry with "adapter_init()" until success.
|
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* This should be used for debugging purposes only.
|
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*
|
||
#define SHUTDOWN_WHEN_LOST
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||
*/
|
||
|
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/*
|
||
* Enable debugging by "-DDE620_DEBUG=3" when compiling,
|
||
* OR by enabling the following #define
|
||
*
|
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* use 0 for production, 1 for verification, >2 for debug
|
||
*
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#define DE620_DEBUG 3
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||
*/
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||
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#ifdef LOWSPEED
|
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/*
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* Enable this #define if you want to see debugging output that show how long
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* we have to wait before the DE-620 is ready for the next read/write/command.
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*
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||
#define COUNT_LOOPS
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||
*/
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#endif
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/fcntl.h>
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#include <linux/string.h>
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#include <linux/interrupt.h>
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#include <linux/ioport.h>
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#include <linux/in.h>
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#include <linux/errno.h>
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#include <linux/init.h>
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#include <linux/inet.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/skbuff.h>
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||
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#include <asm/io.h>
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#include <asm/system.h>
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||
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||
/* Constant definitions for the DE-620 registers, commands and bits */
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#include "de620.h"
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||
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typedef unsigned char byte;
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||
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/*******************************************************
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* *
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* Definition of D-Link DE-620 Ethernet Pocket adapter *
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* See also "de620.h" *
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||
* *
|
||
*******************************************************/
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#ifndef DE620_IO /* Compile-time configurable */
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#define DE620_IO 0x378
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#endif
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#ifndef DE620_IRQ /* Compile-time configurable */
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#define DE620_IRQ 7
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#endif
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#define DATA_PORT (dev->base_addr)
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#define STATUS_PORT (dev->base_addr + 1)
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#define COMMAND_PORT (dev->base_addr + 2)
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#define RUNT 60 /* Too small Ethernet packet */
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#define GIANT 1514 /* largest legal size packet, no fcs */
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#ifdef DE620_DEBUG /* Compile-time configurable */
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#define PRINTK(x) if (de620_debug >= 2) printk x
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#else
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#define DE620_DEBUG 0
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#define PRINTK(x) /**/
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#endif
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/*
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* Force media with insmod:
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* insmod de620.o bnc=1
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* or
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* insmod de620.o utp=1
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*
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* Force io and/or irq with insmod:
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* insmod de620.o io=0x378 irq=7
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*
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* Make a clone skip the Ethernet-address range check:
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* insmod de620.o clone=1
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||
*/
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static int bnc;
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||
static int utp;
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static int io = DE620_IO;
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static int irq = DE620_IRQ;
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static int clone = DE620_CLONE;
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static unsigned int de620_debug = DE620_DEBUG;
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static spinlock_t de620_lock;
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module_param(bnc, int, 0);
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module_param(utp, int, 0);
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module_param(io, int, 0);
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module_param(irq, int, 0);
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module_param(clone, int, 0);
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module_param(de620_debug, int, 0);
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MODULE_PARM_DESC(bnc, "DE-620 set BNC medium (0-1)");
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MODULE_PARM_DESC(utp, "DE-620 set UTP medium (0-1)");
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MODULE_PARM_DESC(io, "DE-620 I/O base address,required");
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MODULE_PARM_DESC(irq, "DE-620 IRQ number,required");
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MODULE_PARM_DESC(clone, "Check also for non-D-Link DE-620 clones (0-1)");
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MODULE_PARM_DESC(de620_debug, "DE-620 debug level (0-2)");
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/***********************************************
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* *
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* Index to functions, as function prototypes. *
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||
* *
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||
***********************************************/
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/*
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* Routines used internally. (See also "convenience macros.. below")
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*/
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/* Put in the device structure. */
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static int de620_open(struct net_device *);
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static int de620_close(struct net_device *);
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static struct net_device_stats *get_stats(struct net_device *);
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static void de620_set_multicast_list(struct net_device *);
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static int de620_start_xmit(struct sk_buff *, struct net_device *);
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/* Dispatch from interrupts. */
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static irqreturn_t de620_interrupt(int, void *, struct pt_regs *);
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static int de620_rx_intr(struct net_device *);
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/* Initialization */
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static int adapter_init(struct net_device *);
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static int read_eeprom(struct net_device *);
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/*
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* D-Link driver variables:
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*/
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#define SCR_DEF NIBBLEMODE |INTON | SLEEP | AUTOTX
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#define TCR_DEF RXPB /* not used: | TXSUCINT | T16INT */
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#define DE620_RX_START_PAGE 12 /* 12 pages (=3k) reserved for tx */
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#define DEF_NIC_CMD IRQEN | ICEN | DS1
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static volatile byte NIC_Cmd;
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static volatile byte next_rx_page;
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static byte first_rx_page;
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static byte last_rx_page;
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static byte EIPRegister;
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static struct nic {
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byte NodeID[6];
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byte RAM_Size;
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byte Model;
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byte Media;
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byte SCR;
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} nic_data;
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||
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/**********************************************************
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* *
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* Convenience macros/functions for D-Link DE-620 adapter *
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||
* *
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**********************************************************/
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#define de620_tx_buffs(dd) (inb(STATUS_PORT) & (TXBF0 | TXBF1))
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#define de620_flip_ds(dd) NIC_Cmd ^= DS0 | DS1; outb(NIC_Cmd, COMMAND_PORT);
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/* Check for ready-status, and return a nibble (high 4 bits) for data input */
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#ifdef COUNT_LOOPS
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static int tot_cnt;
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#endif
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static inline byte
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de620_ready(struct net_device *dev)
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{
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byte value;
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register short int cnt = 0;
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while ((((value = inb(STATUS_PORT)) & READY) == 0) && (cnt <= 1000))
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++cnt;
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#ifdef COUNT_LOOPS
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tot_cnt += cnt;
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#endif
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return value & 0xf0; /* nibble */
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}
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static inline void
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de620_send_command(struct net_device *dev, byte cmd)
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{
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de620_ready(dev);
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if (cmd == W_DUMMY)
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outb(NIC_Cmd, COMMAND_PORT);
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outb(cmd, DATA_PORT);
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outb(NIC_Cmd ^ CS0, COMMAND_PORT);
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de620_ready(dev);
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outb(NIC_Cmd, COMMAND_PORT);
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}
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static inline void
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de620_put_byte(struct net_device *dev, byte value)
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{
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/* The de620_ready() makes 7 loops, on the average, on a DX2/66 */
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de620_ready(dev);
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outb(value, DATA_PORT);
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de620_flip_ds(dev);
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}
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static inline byte
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de620_read_byte(struct net_device *dev)
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{
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byte value;
|
||
|
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/* The de620_ready() makes 7 loops, on the average, on a DX2/66 */
|
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value = de620_ready(dev); /* High nibble */
|
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de620_flip_ds(dev);
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value |= de620_ready(dev) >> 4; /* Low nibble */
|
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return value;
|
||
}
|
||
|
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static inline void
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de620_write_block(struct net_device *dev, byte *buffer, int count, int pad)
|
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{
|
||
#ifndef LOWSPEED
|
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byte uflip = NIC_Cmd ^ (DS0 | DS1);
|
||
byte dflip = NIC_Cmd;
|
||
#else /* LOWSPEED */
|
||
#ifdef COUNT_LOOPS
|
||
int bytes = count;
|
||
#endif /* COUNT_LOOPS */
|
||
#endif /* LOWSPEED */
|
||
|
||
#ifdef LOWSPEED
|
||
#ifdef COUNT_LOOPS
|
||
tot_cnt = 0;
|
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#endif /* COUNT_LOOPS */
|
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/* No further optimization useful, the limit is in the adapter. */
|
||
for ( ; count > 0; --count, ++buffer) {
|
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de620_put_byte(dev,*buffer);
|
||
}
|
||
for ( count = pad ; count > 0; --count, ++buffer) {
|
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de620_put_byte(dev, 0);
|
||
}
|
||
de620_send_command(dev,W_DUMMY);
|
||
#ifdef COUNT_LOOPS
|
||
/* trial debug output: loops per byte in de620_ready() */
|
||
printk("WRITE(%d)\n", tot_cnt/((bytes?bytes:1)));
|
||
#endif /* COUNT_LOOPS */
|
||
#else /* not LOWSPEED */
|
||
for ( ; count > 0; count -=2) {
|
||
outb(*buffer++, DATA_PORT);
|
||
outb(uflip, COMMAND_PORT);
|
||
outb(*buffer++, DATA_PORT);
|
||
outb(dflip, COMMAND_PORT);
|
||
}
|
||
de620_send_command(dev,W_DUMMY);
|
||
#endif /* LOWSPEED */
|
||
}
|
||
|
||
static inline void
|
||
de620_read_block(struct net_device *dev, byte *data, int count)
|
||
{
|
||
#ifndef LOWSPEED
|
||
byte value;
|
||
byte uflip = NIC_Cmd ^ (DS0 | DS1);
|
||
byte dflip = NIC_Cmd;
|
||
#else /* LOWSPEED */
|
||
#ifdef COUNT_LOOPS
|
||
int bytes = count;
|
||
|
||
tot_cnt = 0;
|
||
#endif /* COUNT_LOOPS */
|
||
#endif /* LOWSPEED */
|
||
|
||
#ifdef LOWSPEED
|
||
/* No further optimization useful, the limit is in the adapter. */
|
||
while (count-- > 0) {
|
||
*data++ = de620_read_byte(dev);
|
||
de620_flip_ds(dev);
|
||
}
|
||
#ifdef COUNT_LOOPS
|
||
/* trial debug output: loops per byte in de620_ready() */
|
||
printk("READ(%d)\n", tot_cnt/(2*(bytes?bytes:1)));
|
||
#endif /* COUNT_LOOPS */
|
||
#else /* not LOWSPEED */
|
||
while (count-- > 0) {
|
||
value = inb(STATUS_PORT) & 0xf0; /* High nibble */
|
||
outb(uflip, COMMAND_PORT);
|
||
*data++ = value | inb(STATUS_PORT) >> 4; /* Low nibble */
|
||
outb(dflip , COMMAND_PORT);
|
||
}
|
||
#endif /* LOWSPEED */
|
||
}
|
||
|
||
static inline void
|
||
de620_set_delay(struct net_device *dev)
|
||
{
|
||
de620_ready(dev);
|
||
outb(W_DFR, DATA_PORT);
|
||
outb(NIC_Cmd ^ CS0, COMMAND_PORT);
|
||
|
||
de620_ready(dev);
|
||
#ifdef LOWSPEED
|
||
outb(WRITE_DELAY, DATA_PORT);
|
||
#else
|
||
outb(0, DATA_PORT);
|
||
#endif
|
||
de620_flip_ds(dev);
|
||
|
||
de620_ready(dev);
|
||
#ifdef LOWSPEED
|
||
outb(READ_DELAY, DATA_PORT);
|
||
#else
|
||
outb(0, DATA_PORT);
|
||
#endif
|
||
de620_flip_ds(dev);
|
||
}
|
||
|
||
static inline void
|
||
de620_set_register(struct net_device *dev, byte reg, byte value)
|
||
{
|
||
de620_ready(dev);
|
||
outb(reg, DATA_PORT);
|
||
outb(NIC_Cmd ^ CS0, COMMAND_PORT);
|
||
|
||
de620_put_byte(dev, value);
|
||
}
|
||
|
||
static inline byte
|
||
de620_get_register(struct net_device *dev, byte reg)
|
||
{
|
||
byte value;
|
||
|
||
de620_send_command(dev,reg);
|
||
value = de620_read_byte(dev);
|
||
de620_send_command(dev,W_DUMMY);
|
||
|
||
return value;
|
||
}
|
||
|
||
/*********************************************************************
|
||
*
|
||
* Open/initialize the board.
|
||
*
|
||
* This routine should set everything up anew at each open, even
|
||
* registers that "should" only need to be set once at boot, so that
|
||
* there is a non-reboot way to recover if something goes wrong.
|
||
*
|
||
*/
|
||
static int de620_open(struct net_device *dev)
|
||
{
|
||
int ret = request_irq(dev->irq, de620_interrupt, 0, dev->name, dev);
|
||
if (ret) {
|
||
printk (KERN_ERR "%s: unable to get IRQ %d\n", dev->name, dev->irq);
|
||
return ret;
|
||
}
|
||
|
||
if (adapter_init(dev)) {
|
||
ret = -EIO;
|
||
goto out_free_irq;
|
||
}
|
||
|
||
netif_start_queue(dev);
|
||
return 0;
|
||
|
||
out_free_irq:
|
||
free_irq(dev->irq, dev);
|
||
return ret;
|
||
}
|
||
|
||
/************************************************
|
||
*
|
||
* The inverse routine to de620_open().
|
||
*
|
||
*/
|
||
|
||
static int de620_close(struct net_device *dev)
|
||
{
|
||
netif_stop_queue(dev);
|
||
/* disable recv */
|
||
de620_set_register(dev, W_TCR, RXOFF);
|
||
free_irq(dev->irq, dev);
|
||
return 0;
|
||
}
|
||
|
||
/*********************************************
|
||
*
|
||
* Return current statistics
|
||
*
|
||
*/
|
||
static struct net_device_stats *get_stats(struct net_device *dev)
|
||
{
|
||
return (struct net_device_stats *)(dev->priv);
|
||
}
|
||
|
||
/*********************************************
|
||
*
|
||
* Set or clear the multicast filter for this adaptor.
|
||
* (no real multicast implemented for the DE-620, but she can be promiscuous...)
|
||
*
|
||
*/
|
||
|
||
static void de620_set_multicast_list(struct net_device *dev)
|
||
{
|
||
if (dev->mc_count || dev->flags&(IFF_ALLMULTI|IFF_PROMISC))
|
||
{ /* Enable promiscuous mode */
|
||
/*
|
||
* We must make the kernel realise we had to move
|
||
* into promisc mode or we start all out war on
|
||
* the cable. - AC
|
||
*/
|
||
dev->flags|=IFF_PROMISC;
|
||
|
||
de620_set_register(dev, W_TCR, (TCR_DEF & ~RXPBM) | RXALL);
|
||
}
|
||
else
|
||
{ /* Disable promiscuous mode, use normal mode */
|
||
de620_set_register(dev, W_TCR, TCR_DEF);
|
||
}
|
||
}
|
||
|
||
/*******************************************************
|
||
*
|
||
* Handle timeouts on transmit
|
||
*/
|
||
|
||
static void de620_timeout(struct net_device *dev)
|
||
{
|
||
printk(KERN_WARNING "%s: transmit timed out, %s?\n", dev->name, "network cable problem");
|
||
/* Restart the adapter. */
|
||
if (!adapter_init(dev)) /* maybe close it */
|
||
netif_wake_queue(dev);
|
||
}
|
||
|
||
/*******************************************************
|
||
*
|
||
* Copy a buffer to the adapter transmit page memory.
|
||
* Start sending.
|
||
*/
|
||
static int de620_start_xmit(struct sk_buff *skb, struct net_device *dev)
|
||
{
|
||
unsigned long flags;
|
||
int len;
|
||
byte *buffer = skb->data;
|
||
byte using_txbuf;
|
||
|
||
using_txbuf = de620_tx_buffs(dev); /* Peek at the adapter */
|
||
|
||
netif_stop_queue(dev);
|
||
|
||
|
||
if ((len = skb->len) < RUNT)
|
||
len = RUNT;
|
||
if (len & 1) /* send an even number of bytes */
|
||
++len;
|
||
|
||
/* Start real output */
|
||
|
||
spin_lock_irqsave(&de620_lock, flags)
|
||
PRINTK(("de620_start_xmit: len=%d, bufs 0x%02x\n",
|
||
(int)skb->len, using_txbuf));
|
||
|
||
/* select a free tx buffer. if there is one... */
|
||
switch (using_txbuf) {
|
||
default: /* both are free: use TXBF0 */
|
||
case TXBF1: /* use TXBF0 */
|
||
de620_send_command(dev,W_CR | RW0);
|
||
using_txbuf |= TXBF0;
|
||
break;
|
||
|
||
case TXBF0: /* use TXBF1 */
|
||
de620_send_command(dev,W_CR | RW1);
|
||
using_txbuf |= TXBF1;
|
||
break;
|
||
|
||
case (TXBF0 | TXBF1): /* NONE!!! */
|
||
printk(KERN_WARNING "%s: No tx-buffer available!\n", dev->name);
|
||
spin_unlock_irqrestore(&de620_lock, flags);
|
||
return 1;
|
||
}
|
||
de620_write_block(dev, buffer, skb->len, len-skb->len);
|
||
|
||
dev->trans_start = jiffies;
|
||
if(!(using_txbuf == (TXBF0 | TXBF1)))
|
||
netif_wake_queue(dev);
|
||
|
||
((struct net_device_stats *)(dev->priv))->tx_packets++;
|
||
spin_unlock_irqrestore(&de620_lock, flags);
|
||
dev_kfree_skb (skb);
|
||
return 0;
|
||
}
|
||
|
||
/*****************************************************
|
||
*
|
||
* Handle the network interface interrupts.
|
||
*
|
||
*/
|
||
static irqreturn_t
|
||
de620_interrupt(int irq_in, void *dev_id, struct pt_regs *regs)
|
||
{
|
||
struct net_device *dev = dev_id;
|
||
byte irq_status;
|
||
int bogus_count = 0;
|
||
int again = 0;
|
||
|
||
spin_lock(&de620_lock);
|
||
|
||
/* Read the status register (_not_ the status port) */
|
||
irq_status = de620_get_register(dev, R_STS);
|
||
|
||
PRINTK(("de620_interrupt (%2.2X)\n", irq_status));
|
||
|
||
if (irq_status & RXGOOD) {
|
||
do {
|
||
again = de620_rx_intr(dev);
|
||
PRINTK(("again=%d\n", again));
|
||
}
|
||
while (again && (++bogus_count < 100));
|
||
}
|
||
|
||
if(de620_tx_buffs(dev) != (TXBF0 | TXBF1))
|
||
netif_wake_queue(dev);
|
||
|
||
spin_unlock(&de620_lock);
|
||
return IRQ_HANDLED;
|
||
}
|
||
|
||
/**************************************
|
||
*
|
||
* Get a packet from the adapter
|
||
*
|
||
* Send it "upstairs"
|
||
*
|
||
*/
|
||
static int de620_rx_intr(struct net_device *dev)
|
||
{
|
||
struct header_buf {
|
||
byte status;
|
||
byte Rx_NextPage;
|
||
unsigned short Rx_ByteCount;
|
||
} header_buf;
|
||
struct sk_buff *skb;
|
||
int size;
|
||
byte *buffer;
|
||
byte pagelink;
|
||
byte curr_page;
|
||
|
||
PRINTK(("de620_rx_intr: next_rx_page = %d\n", next_rx_page));
|
||
|
||
/* Tell the adapter that we are going to read data, and from where */
|
||
de620_send_command(dev, W_CR | RRN);
|
||
de620_set_register(dev, W_RSA1, next_rx_page);
|
||
de620_set_register(dev, W_RSA0, 0);
|
||
|
||
/* Deep breath, and away we goooooo */
|
||
de620_read_block(dev, (byte *)&header_buf, sizeof(struct header_buf));
|
||
PRINTK(("page status=0x%02x, nextpage=%d, packetsize=%d\n",
|
||
header_buf.status, header_buf.Rx_NextPage, header_buf.Rx_ByteCount));
|
||
|
||
/* Plausible page header? */
|
||
pagelink = header_buf.Rx_NextPage;
|
||
if ((pagelink < first_rx_page) || (last_rx_page < pagelink)) {
|
||
/* Ouch... Forget it! Skip all and start afresh... */
|
||
printk(KERN_WARNING "%s: Ring overrun? Restoring...\n", dev->name);
|
||
/* You win some, you lose some. And sometimes plenty... */
|
||
adapter_init(dev);
|
||
netif_wake_queue(dev);
|
||
((struct net_device_stats *)(dev->priv))->rx_over_errors++;
|
||
return 0;
|
||
}
|
||
|
||
/* OK, this look good, so far. Let's see if it's consistent... */
|
||
/* Let's compute the start of the next packet, based on where we are */
|
||
pagelink = next_rx_page +
|
||
((header_buf.Rx_ByteCount + (4 - 1 + 0x100)) >> 8);
|
||
|
||
/* Are we going to wrap around the page counter? */
|
||
if (pagelink > last_rx_page)
|
||
pagelink -= (last_rx_page - first_rx_page + 1);
|
||
|
||
/* Is the _computed_ next page number equal to what the adapter says? */
|
||
if (pagelink != header_buf.Rx_NextPage) {
|
||
/* Naah, we'll skip this packet. Probably bogus data as well */
|
||
printk(KERN_WARNING "%s: Page link out of sync! Restoring...\n", dev->name);
|
||
next_rx_page = header_buf.Rx_NextPage; /* at least a try... */
|
||
de620_send_command(dev, W_DUMMY);
|
||
de620_set_register(dev, W_NPRF, next_rx_page);
|
||
((struct net_device_stats *)(dev->priv))->rx_over_errors++;
|
||
return 0;
|
||
}
|
||
next_rx_page = pagelink;
|
||
|
||
size = header_buf.Rx_ByteCount - 4;
|
||
if ((size < RUNT) || (GIANT < size)) {
|
||
printk(KERN_WARNING "%s: Illegal packet size: %d!\n", dev->name, size);
|
||
}
|
||
else { /* Good packet? */
|
||
skb = dev_alloc_skb(size+2);
|
||
if (skb == NULL) { /* Yeah, but no place to put it... */
|
||
printk(KERN_WARNING "%s: Couldn't allocate a sk_buff of size %d.\n", dev->name, size);
|
||
((struct net_device_stats *)(dev->priv))->rx_dropped++;
|
||
}
|
||
else { /* Yep! Go get it! */
|
||
skb_reserve(skb,2); /* Align */
|
||
skb->dev = dev;
|
||
/* skb->data points to the start of sk_buff data area */
|
||
buffer = skb_put(skb,size);
|
||
/* copy the packet into the buffer */
|
||
de620_read_block(dev, buffer, size);
|
||
PRINTK(("Read %d bytes\n", size));
|
||
skb->protocol=eth_type_trans(skb,dev);
|
||
netif_rx(skb); /* deliver it "upstairs" */
|
||
dev->last_rx = jiffies;
|
||
/* count all receives */
|
||
((struct net_device_stats *)(dev->priv))->rx_packets++;
|
||
((struct net_device_stats *)(dev->priv))->rx_bytes += size;
|
||
}
|
||
}
|
||
|
||
/* Let's peek ahead to see if we have read the last current packet */
|
||
/* NOTE! We're _not_ checking the 'EMPTY'-flag! This seems better... */
|
||
curr_page = de620_get_register(dev, R_CPR);
|
||
de620_set_register(dev, W_NPRF, next_rx_page);
|
||
PRINTK(("next_rx_page=%d CPR=%d\n", next_rx_page, curr_page));
|
||
|
||
return (next_rx_page != curr_page); /* That was slightly tricky... */
|
||
}
|
||
|
||
/*********************************************
|
||
*
|
||
* Reset the adapter to a known state
|
||
*
|
||
*/
|
||
static int adapter_init(struct net_device *dev)
|
||
{
|
||
int i;
|
||
static int was_down;
|
||
|
||
if ((nic_data.Model == 3) || (nic_data.Model == 0)) { /* CT */
|
||
EIPRegister = NCTL0;
|
||
if (nic_data.Media != 1)
|
||
EIPRegister |= NIS0; /* not BNC */
|
||
}
|
||
else if (nic_data.Model == 2) { /* UTP */
|
||
EIPRegister = NCTL0 | NIS0;
|
||
}
|
||
|
||
if (utp)
|
||
EIPRegister = NCTL0 | NIS0;
|
||
if (bnc)
|
||
EIPRegister = NCTL0;
|
||
|
||
de620_send_command(dev, W_CR | RNOP | CLEAR);
|
||
de620_send_command(dev, W_CR | RNOP);
|
||
|
||
de620_set_register(dev, W_SCR, SCR_DEF);
|
||
/* disable recv to wait init */
|
||
de620_set_register(dev, W_TCR, RXOFF);
|
||
|
||
/* Set the node ID in the adapter */
|
||
for (i = 0; i < 6; ++i) { /* W_PARn = 0xaa + n */
|
||
de620_set_register(dev, W_PAR0 + i, dev->dev_addr[i]);
|
||
}
|
||
|
||
de620_set_register(dev, W_EIP, EIPRegister);
|
||
|
||
next_rx_page = first_rx_page = DE620_RX_START_PAGE;
|
||
if (nic_data.RAM_Size)
|
||
last_rx_page = nic_data.RAM_Size - 1;
|
||
else /* 64k RAM */
|
||
last_rx_page = 255;
|
||
|
||
de620_set_register(dev, W_SPR, first_rx_page); /* Start Page Register*/
|
||
de620_set_register(dev, W_EPR, last_rx_page); /* End Page Register */
|
||
de620_set_register(dev, W_CPR, first_rx_page);/*Current Page Register*/
|
||
de620_send_command(dev, W_NPR | first_rx_page); /* Next Page Register*/
|
||
de620_send_command(dev, W_DUMMY);
|
||
de620_set_delay(dev);
|
||
|
||
/* Final sanity check: Anybody out there? */
|
||
/* Let's hope some bits from the statusregister make a good check */
|
||
#define CHECK_MASK ( 0 | TXSUC | T16 | 0 | RXCRC | RXSHORT | 0 | 0 )
|
||
#define CHECK_OK ( 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 )
|
||
/* success: X 0 0 X 0 0 X X */
|
||
/* ignore: EEDI RXGOOD COLS LNKS*/
|
||
|
||
if (((i = de620_get_register(dev, R_STS)) & CHECK_MASK) != CHECK_OK) {
|
||
printk(KERN_ERR "%s: Something has happened to the DE-620! Please check it"
|
||
#ifdef SHUTDOWN_WHEN_LOST
|
||
" and do a new ifconfig"
|
||
#endif
|
||
"! (%02x)\n", dev->name, i);
|
||
#ifdef SHUTDOWN_WHEN_LOST
|
||
/* Goodbye, cruel world... */
|
||
dev->flags &= ~IFF_UP;
|
||
de620_close(dev);
|
||
#endif
|
||
was_down = 1;
|
||
return 1; /* failed */
|
||
}
|
||
if (was_down) {
|
||
printk(KERN_WARNING "%s: Thanks, I feel much better now!\n", dev->name);
|
||
was_down = 0;
|
||
}
|
||
|
||
/* All OK, go ahead... */
|
||
de620_set_register(dev, W_TCR, TCR_DEF);
|
||
|
||
return 0; /* all ok */
|
||
}
|
||
|
||
/******************************************************************************
|
||
*
|
||
* Only start-up code below
|
||
*
|
||
*/
|
||
/****************************************
|
||
*
|
||
* Check if there is a DE-620 connected
|
||
*/
|
||
struct net_device * __init de620_probe(int unit)
|
||
{
|
||
byte checkbyte = 0xa5;
|
||
struct net_device *dev;
|
||
int err = -ENOMEM;
|
||
int i;
|
||
|
||
dev = alloc_etherdev(sizeof(struct net_device_stats));
|
||
if (!dev)
|
||
goto out;
|
||
|
||
SET_MODULE_OWNER(dev);
|
||
|
||
spin_lock_init(&de620_lock);
|
||
|
||
/*
|
||
* This is where the base_addr and irq gets set.
|
||
* Tunable at compile-time and insmod-time
|
||
*/
|
||
dev->base_addr = io;
|
||
dev->irq = irq;
|
||
|
||
/* allow overriding parameters on command line */
|
||
if (unit >= 0) {
|
||
sprintf(dev->name, "eth%d", unit);
|
||
netdev_boot_setup_check(dev);
|
||
}
|
||
|
||
if (de620_debug)
|
||
printk(version);
|
||
|
||
printk(KERN_INFO "D-Link DE-620 pocket adapter");
|
||
|
||
if (!request_region(dev->base_addr, 3, "de620")) {
|
||
printk(" io 0x%3lX, which is busy.\n", dev->base_addr);
|
||
err = -EBUSY;
|
||
goto out1;
|
||
}
|
||
|
||
/* Initially, configure basic nibble mode, so we can read the EEPROM */
|
||
NIC_Cmd = DEF_NIC_CMD;
|
||
de620_set_register(dev, W_EIP, EIPRegister);
|
||
|
||
/* Anybody out there? */
|
||
de620_set_register(dev, W_CPR, checkbyte);
|
||
checkbyte = de620_get_register(dev, R_CPR);
|
||
|
||
if ((checkbyte != 0xa5) || (read_eeprom(dev) != 0)) {
|
||
printk(" not identified in the printer port\n");
|
||
err = -ENODEV;
|
||
goto out2;
|
||
}
|
||
|
||
/* else, got it! */
|
||
printk(", Ethernet Address: %2.2X",
|
||
dev->dev_addr[0] = nic_data.NodeID[0]);
|
||
for (i = 1; i < ETH_ALEN; i++) {
|
||
printk(":%2.2X", dev->dev_addr[i] = nic_data.NodeID[i]);
|
||
dev->broadcast[i] = 0xff;
|
||
}
|
||
|
||
printk(" (%dk RAM,",
|
||
(nic_data.RAM_Size) ? (nic_data.RAM_Size >> 2) : 64);
|
||
|
||
if (nic_data.Media == 1)
|
||
printk(" BNC)\n");
|
||
else
|
||
printk(" UTP)\n");
|
||
|
||
dev->get_stats = get_stats;
|
||
dev->open = de620_open;
|
||
dev->stop = de620_close;
|
||
dev->hard_start_xmit = de620_start_xmit;
|
||
dev->tx_timeout = de620_timeout;
|
||
dev->watchdog_timeo = HZ*2;
|
||
dev->set_multicast_list = de620_set_multicast_list;
|
||
|
||
/* base_addr and irq are already set, see above! */
|
||
|
||
/* dump eeprom */
|
||
if (de620_debug) {
|
||
printk("\nEEPROM contents:\n");
|
||
printk("RAM_Size = 0x%02X\n", nic_data.RAM_Size);
|
||
printk("NodeID = %02X:%02X:%02X:%02X:%02X:%02X\n",
|
||
nic_data.NodeID[0], nic_data.NodeID[1],
|
||
nic_data.NodeID[2], nic_data.NodeID[3],
|
||
nic_data.NodeID[4], nic_data.NodeID[5]);
|
||
printk("Model = %d\n", nic_data.Model);
|
||
printk("Media = %d\n", nic_data.Media);
|
||
printk("SCR = 0x%02x\n", nic_data.SCR);
|
||
}
|
||
|
||
err = register_netdev(dev);
|
||
if (err)
|
||
goto out2;
|
||
return dev;
|
||
|
||
out2:
|
||
release_region(dev->base_addr, 3);
|
||
out1:
|
||
free_netdev(dev);
|
||
out:
|
||
return ERR_PTR(err);
|
||
}
|
||
|
||
/**********************************
|
||
*
|
||
* Read info from on-board EEPROM
|
||
*
|
||
* Note: Bitwise serial I/O to/from the EEPROM vi the status _register_!
|
||
*/
|
||
#define sendit(dev,data) de620_set_register(dev, W_EIP, data | EIPRegister);
|
||
|
||
static unsigned short __init ReadAWord(struct net_device *dev, int from)
|
||
{
|
||
unsigned short data;
|
||
int nbits;
|
||
|
||
/* cs [__~~] SET SEND STATE */
|
||
/* di [____] */
|
||
/* sck [_~~_] */
|
||
sendit(dev, 0); sendit(dev, 1); sendit(dev, 5); sendit(dev, 4);
|
||
|
||
/* Send the 9-bit address from where we want to read the 16-bit word */
|
||
for (nbits = 9; nbits > 0; --nbits, from <<= 1) {
|
||
if (from & 0x0100) { /* bit set? */
|
||
/* cs [~~~~] SEND 1 */
|
||
/* di [~~~~] */
|
||
/* sck [_~~_] */
|
||
sendit(dev, 6); sendit(dev, 7); sendit(dev, 7); sendit(dev, 6);
|
||
}
|
||
else {
|
||
/* cs [~~~~] SEND 0 */
|
||
/* di [____] */
|
||
/* sck [_~~_] */
|
||
sendit(dev, 4); sendit(dev, 5); sendit(dev, 5); sendit(dev, 4);
|
||
}
|
||
}
|
||
|
||
/* Shift in the 16-bit word. The bits appear serially in EEDI (=0x80) */
|
||
for (data = 0, nbits = 16; nbits > 0; --nbits) {
|
||
/* cs [~~~~] SEND 0 */
|
||
/* di [____] */
|
||
/* sck [_~~_] */
|
||
sendit(dev, 4); sendit(dev, 5); sendit(dev, 5); sendit(dev, 4);
|
||
data = (data << 1) | ((de620_get_register(dev, R_STS) & EEDI) >> 7);
|
||
}
|
||
/* cs [____] RESET SEND STATE */
|
||
/* di [____] */
|
||
/* sck [_~~_] */
|
||
sendit(dev, 0); sendit(dev, 1); sendit(dev, 1); sendit(dev, 0);
|
||
|
||
return data;
|
||
}
|
||
|
||
static int __init read_eeprom(struct net_device *dev)
|
||
{
|
||
unsigned short wrd;
|
||
|
||
/* D-Link Ethernet addresses are in the series 00:80:c8:7X:XX:XX:XX */
|
||
wrd = ReadAWord(dev, 0x1aa); /* bytes 0 + 1 of NodeID */
|
||
if (!clone && (wrd != htons(0x0080))) /* Valid D-Link ether sequence? */
|
||
return -1; /* Nope, not a DE-620 */
|
||
nic_data.NodeID[0] = wrd & 0xff;
|
||
nic_data.NodeID[1] = wrd >> 8;
|
||
|
||
wrd = ReadAWord(dev, 0x1ab); /* bytes 2 + 3 of NodeID */
|
||
if (!clone && ((wrd & 0xff) != 0xc8)) /* Valid D-Link ether sequence? */
|
||
return -1; /* Nope, not a DE-620 */
|
||
nic_data.NodeID[2] = wrd & 0xff;
|
||
nic_data.NodeID[3] = wrd >> 8;
|
||
|
||
wrd = ReadAWord(dev, 0x1ac); /* bytes 4 + 5 of NodeID */
|
||
nic_data.NodeID[4] = wrd & 0xff;
|
||
nic_data.NodeID[5] = wrd >> 8;
|
||
|
||
wrd = ReadAWord(dev, 0x1ad); /* RAM size in pages (256 bytes). 0 = 64k */
|
||
nic_data.RAM_Size = (wrd >> 8);
|
||
|
||
wrd = ReadAWord(dev, 0x1ae); /* hardware model (CT = 3) */
|
||
nic_data.Model = (wrd & 0xff);
|
||
|
||
wrd = ReadAWord(dev, 0x1af); /* media (indicates BNC/UTP) */
|
||
nic_data.Media = (wrd & 0xff);
|
||
|
||
wrd = ReadAWord(dev, 0x1a8); /* System Configuration Register */
|
||
nic_data.SCR = (wrd >> 8);
|
||
|
||
return 0; /* no errors */
|
||
}
|
||
|
||
/******************************************************************************
|
||
*
|
||
* Loadable module skeleton
|
||
*
|
||
*/
|
||
#ifdef MODULE
|
||
static struct net_device *de620_dev;
|
||
|
||
int __init init_module(void)
|
||
{
|
||
de620_dev = de620_probe(-1);
|
||
if (IS_ERR(de620_dev))
|
||
return PTR_ERR(de620_dev);
|
||
return 0;
|
||
}
|
||
|
||
void cleanup_module(void)
|
||
{
|
||
unregister_netdev(de620_dev);
|
||
release_region(de620_dev->base_addr, 3);
|
||
free_netdev(de620_dev);
|
||
}
|
||
#endif /* MODULE */
|
||
MODULE_LICENSE("GPL");
|
||
|
||
|
||
/*
|
||
* (add '-DMODULE' when compiling as loadable module)
|
||
*
|
||
* compile-command:
|
||
* gcc -D__KERNEL__ -Wall -Wstrict-prototypes -O2 \
|
||
* -fomit-frame-pointer -m486 \
|
||
* -I/usr/src/linux/include -I../../net/inet -c de620.c
|
||
*/
|
||
/*
|
||
* Local variables:
|
||
* kernel-compile-command: "gcc -D__KERNEL__ -Ilinux/include -I../../net/inet -Wall -Wstrict-prototypes -O2 -m486 -c de620.c"
|
||
* module-compile-command: "gcc -D__KERNEL__ -DMODULE -Ilinux/include -I../../net/inet -Wall -Wstrict-prototypes -O2 -m486 -c de620.c"
|
||
* compile-command: "gcc -D__KERNEL__ -DMODULE -Ilinux/include -I../../net/inet -Wall -Wstrict-prototypes -O2 -m486 -c de620.c"
|
||
* End:
|
||
*/
|