Commit graph

67 commits

Author SHA1 Message Date
Russell King
ba899dbc03 [SERIAL] Make port->ops constant
No one should write to the port->ops structure, so make it constant.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-01-21 22:45:50 +00:00
Ingo Molnar
e2862f6a83 [SERIAL] convert uart_state.sem to uart_state.mutex
semaphore to mutex conversion.

the conversion was generated via scripts, and the result was validated
automatically via a script as well.

build and boot tested.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-01-13 21:37:07 +00:00
Arjan van de Ven
f392ecfa12 [SERIAL] turn serial semaphores into mutexes
Turn several drivers/serial/ semaphores-used-as-mutex into mutexes

Signed-off-by: Arjan van de Ven <arjan@infradead.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-01-12 18:44:32 +00:00
Russell King
f61051cd2f [SERIAL] Fix clocal wakeup problem
Jim Alexander reported a problem where "if one calls open() in
blocking mode with CLOCAL off, the 8250.c driver under the 2.6
kernel (or at least 2.6.8 and 2.6.10) does not wake up the
blocked process when DCD is asserted."

Fix this by enabling modem status interrupts immediately before
we read the carrier detect status.

Thanks to Jim for reporting the problem and testing the fix.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-01-07 23:11:23 +00:00
Benjamin Herrenschmidt
1624f00334 [SERIAL] Fix matching of MMIO ports
The function uart_match_port() incorrectly compares the ioremap'd
virtual addresses of ports instead of the physical address to find
duplicate ports for MMIO based UARTs. This fixes it.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-01-04 18:09:44 +00:00
Arjan van de Ven
cb3592be27 [SERIAL] mark several serial tables const
This patch marks a few serial data structures const, moving them to
.rodata where they won't false-share cachelines with things that get
written to.

Signed-off-by: Arjan van de Ven <arjan@infradead.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-11-28 21:04:11 +00:00
Russell King
ee31b33785 [SERIAL] Fix Bug 4900: S3 resume oops with irattach - Thinkpad A21m
If we fail to re-startup a serial port on resume, shut it down
immediately and mark it as an error condition.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-11-13 15:28:51 +00:00
Pantelis Antoniou
21c614a789 [SERIAL] Support Au1x00 8250 UARTs using the generic 8250 driver.
The offsets of the registers are in a different place, and
some parts cannot handle a full set of modem control signals.

Signed-off-by: Pantelis Antoniou <pantelis@embeddedalley.ocm>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-11-06 09:07:03 +00:00
Russell King
0cf669d5c5 [SERIAL] Arrange better identification of ports
Folk seem to get confused when they see two or more ttyS0 ports
appearing at boot time.  One comes from the legacy table, and
one from PNP.

Hence, display the bus ID of the device which supplied the port.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-10-31 11:42:22 +00:00
Jayachandran C
a2436b22de [SERIAL] remove unneeded code from serial_core.c
This patch fixes an issue reported by Coverity in serial/serial_core.c

Error reported: Variable "&((info)->tty)->flags" tracked as NULL was passed to a
function that dereferences it.

The later statements in the function assumes 'info->tty != NULL', so this
check is not necessary.  Probably a 'BUG_ON(info->tty == NULL)' can be added.

Signed-off-by: Jayachandran C. <c.jayachandran at gmail.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-10-30 23:26:16 +00:00
Russell King
30b7a3bc13 [SERIAL] Prefix serial printks with KERN_INFO and pre-format
Pre-format the IO part of the ttyS printks, and prefix them with
KERN_INFO to avoid bootsplash corruption.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-09-03 15:30:21 +01:00
Sascha Hauer
0f302dc354 [ARM] 2866/1: add i.MX set_mctrl / get_mctrl functions
Patch from Sascha Hauer

This patch adds support for setting and getting RTS / CTS via
set_mtctrl / get_mctrl functions.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-08-31 21:48:47 +01:00
Russell King
b129a8ccd5 [SERIAL] Clean up and fix tty transmission start/stoping
The start_tx and stop_tx methods were passed a flag to indicate
whether the start/stop was from the tty start/stop callbacks, and
some drivers used this flag to decide whether to ask the UART to
immediately stop transmission (where the UART supports such a
feature.)

There are other cases when we wish this to occur - when CTS is
lowered, or if we change from soft to hard flow control and CTS
is inactive.  In these cases, this flag was false, and we would
allow the transmitter to drain before stopping.

There is really only one case where we want to let the transmitter
drain before disabling, and that's when we run out of characters
to send.

Hence, re-jig the start_tx and stop_tx methods to eliminate this
flag, and introduce new functions for the special "disable and
allow transmitter to drain" case.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-08-31 10:12:14 +01:00
Russell King
976ecd12b8 [PATCH] Serial: Fix console port spinlock initialisation
Initialise the spinlock for port being used by the console early, but
don't re-initialise it again later.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-07-03 21:05:45 +01:00
Russell King
0dd7a1aed7 [PATCH] Serial: Check status of CTS when using flow control
Fix bugme #4712: read the CTS status and set hw_stopped if CTS
is not active when opening the port and/or enabling CRTSCTS

Thanks to Stefan Wolff for spotting this problem.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-29 18:40:53 +01:00
Russell King
c5f4644e6c [PATCH] Serial: Adjust serial locking
This patch changes the way serial ports are locked when getting modem
status.  This change is necessary because we will need to atomically
read the modem status and take action depending on the CTS status.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-29 09:42:38 +01:00
Linus Torvalds
1da177e4c3 Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
2005-04-16 15:20:36 -07:00