Commit Graph

69 Commits

Author SHA1 Message Date
Alan Cox 8ce73264b7 tty: Move the vt_tty field from the vc_data into the standard tty_port
This takes all the tty references through the expected interface points so
we can refcount them.

Signed-off-by: Alan Cox <alan@linux.intel.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-08-10 13:47:42 -07:00
Samuel Thibault 53c1f76402 Input: keyboard - also match braille-only keyboards
drivers/char/keyboard.c also handles braille keys, so it should also match
braille-only keyboards.

Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
2010-07-31 02:29:31 -07:00
Dmitry Torokhov e0785572ce Input: keyboard - fix formatting issues
Also convert few variables to 'bool'.

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
2010-04-13 23:26:35 -07:00
Dmitry Torokhov 9272e9a2f8 Input: keyboard - switch to using pr_err() and friends
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
2010-04-13 23:26:14 -07:00
Dmitry Torokhov 97f5f0cd8c Input: implement SysRq as a separate input handler
Instead of keeping SysRq support inside of legacy keyboard driver split
it out into a separate input handler (filter). This stops most SysRq input
events from leaking into evdev clients (some events, such as first SysRq
scancode - not keycode - event, are still leaked into both legacy keyboard
and evdev).

[martinez.javier@gmail.com: fix compile error when CONFIG_MAGIC_SYSRQ is
 not defined]
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
2010-04-13 23:26:02 -07:00
Dmitry Torokhov 0b7024ac4d Input: add match() method to input hanlders
Get rid of blacklist in input handler structure and instead allow
handlers to define their own match() method to perform fine-grained
filtering of supported devices.

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
2010-02-04 00:25:19 -08:00
Dmitry Torokhov 99b089c3c3 Input: Mac button emulation - implement as an input filter
Current implementation of Mac mouse button emulation plugs into legacy
keyboard driver, converts certain keys into button events on a separate
device, and suppresses the real events from reaching tty. This worked
well enough until user space started using evdev which was completely
unaware of this arrangement and kept sending original key presses to
its users. Change the implementation to use newly added input filter
framework so that original key presses are not transmitted to any
handlers.

As a bonus remove SYSCTL dependencies from the code and use Kconfig
instead; also do not create the emulated mouse device until user
activates emulation.

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
2010-01-30 01:47:49 -08:00
Dmitry Torokhov 18f7ad59b0 Input: keyboard - don't override beep with a bell
The commit 66d2a5952e introduces a bug:
for every beep requested, a bell is also generated.

Reported-by: Paul Martin <pm@debian.org>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
2009-12-15 21:48:55 -08:00
Dmitry Torokhov 467832032c Merge commit 'v2.6.32' into next 2009-12-02 23:38:13 -08:00
Dmitry Torokhov 66d2a5952e Input: keyboard - fix lack of locking when traversing handler->h_list
Keyboard handler should not attempt to traverse handler->h_list on
its own, without any locking, otherwise it races with registering
and unregistering of input handles which leads to crashes.

Introduce input_handler_for_each_handle() helper that allows safely
iterate over all handles attached to a particular handler and switch
keyboard handler to use it.

Reported-by: Jim Paradis <jparadis@redhat.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
2009-12-01 21:57:48 -08:00
Dmitry Torokhov 21cea58e49 Input: keyboard - add locking around event handling
Keyboard input handler is multiplexing events form all keyboard-like
devices in the system. Because of that per-device lock provided by
input core is not enough to prevent clashes in ked_event() and we
need our own lock to ensure that only one thread at a time executing
kbd_event().

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
2009-11-29 23:41:15 -08:00
Samuel Thibault 46a965462a Input: keyboard - fix braille keyboard keysym generation
Keysyms stored in key_map[] are not simply K() values, but U(K()) values,
as can be seen in the KDSKBENT ioctl handler.  The kernel-generated
braille keysyms thus need a U() call too.

Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
2009-11-25 23:05:17 -08:00
Alan Jenkins 0c09b2ac35 Input: keyboard - fix theoretical race on vt switch
A VT switch can theoretically change fg_console between

        vc = vc_cons[fg_console].d
and
        kbd = kbd_table + fg_console

Fix it by replacing the second fg_console with vc->vc_num.

Signed-off-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
2009-11-20 00:52:14 -08:00
Dmitry Torokhov e912a30184 Input: keyboard - remove warning about raw mode not supported
This warning made sense when legacy keyboard driver was preferred
driver in X, but now that evdev driver is the default we can remove
the warning.

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
2009-04-20 21:21:24 -07:00
Dmitry Torokhov 161c609173 Input: keyboard - fix potential out of bound access to key_map
Reported-by: Michal Roszkowski <michal@roszkowski.org>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
2008-10-08 23:45:36 -04:00
Dmitry Torokhov 908cf4b925 Merge master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6 into next 2008-07-21 00:55:14 -04:00
Jiri Bohac d2187ebd84 console keyboard mapping broken by 04c71976
Several console keyboard maps are broken since

commit 04c7197650
Author: Samuel Thibault <samuel.thibault@ens-lyon.org>
Date:   Tue Oct 16 23:27:04 2007 -0700

    unicode diacritics support

because that changeset made k_self consider the value as a latin1
character when in Unicode mode, which is wrong; k_self should still take
the console map into account.

Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-06-12 18:05:41 -07:00
Joe Perches 253b00f1e6 Input: remove unused defines
Remove unused to_dev, to_handler, to_handle from include/linux/input.h
Move to_handle_h from include/linux/input.h to drivers/char/keyboard.c

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
2008-05-16 14:51:47 -04:00
Samuel Thibault f7511d5f66 Basic braille screen reader support
This adds a minimalistic braille screen reader support.  This is meant to
be used by blind people e.g.  on boot failures or when / cannot be mounted
etc and thus the userland screen readers can not work.

[akpm@linux-foundation.org: fix exports]
Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Cc: Jiri Kosina <jikos@jikos.cz>
Cc: Dmitry Torokhov <dtor@mail.ru>
Acked-by: Alan Cox <alan@redhat.com>
Cc: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-30 08:29:52 -07:00
Alan Cox f34d7a5b70 tty: The big operations rework
- Operations are now a shared const function block as with most other Linux
  objects

- Introduce wrappers for some optional functions to get consistent behaviour

- Wrap put_char which used to be patched by the tty layer

- Document which functions are needed/optional

- Make put_char report success/fail

- Cache the driver->ops pointer in the tty as tty->ops

- Remove various surplus lock calls we no longer need

- Remove proc_write method as noted by Alexey Dobriyan

- Introduce some missing sanity checks where certain driver/ldisc
  combinations would oops as they didn't check needed methods were present

[akpm@linux-foundation.org: fix fs/compat_ioctl.c build]
[akpm@linux-foundation.org: fix isicom]
[akpm@linux-foundation.org: fix arch/ia64/hp/sim/simserial.c build]
[akpm@linux-foundation.org: fix kgdb]
Signed-off-by: Alan Cox <alan@redhat.com>
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
Cc: Jason Wessel <jason.wessel@windriver.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-30 08:29:47 -07:00
Linus Torvalds ce1d5b23a8 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: (40 commits)
  Input: wacom - add support for Cintiq 20WSX
  Input: ucb1400_ts - IRQ probe fix
  Input: at32psif - update MODULE_AUTHOR with new email
  Input: mac_hid - add lockdep annotation to emumousebtn
  Input: i8042 - fix incorrect usage of strncpy and strncat
  Input: bf54x-keys - add infrastructure for keypad wakeups
  Input: add MODULE_ALIAS() to hotpluggable platform modules
  Input: drivers/char/keyboard.c - use time_after
  Input: fix ordering in joystick Makefile
  Input: wm97xx-core - support use as a wakeup source
  Input: wm97xx-core - use IRQF_SAMPLE_RANDOM
  Input: wm97xx-core - only schedule interrupt handler if not already scheduled
  Input: add Zhen Hua driver
  Input: aiptek - add support for Genius G-PEN 560 tablet
  Input: wacom - implement suspend and autosuspend
  Input: xpad - set proper buffer length for outgoing requests
  Input: omap-keypad - fix build warning
  Input: gpio_keys - irq handling cleanup
  Input: add PS/2 serio driver for AVR32 devices
  Input: put ledstate in the keyboard notifier
  ...
2008-04-25 12:38:14 -07:00
Julia Lawall b39b04403b Input: drivers/char/keyboard.c - use time_after
The functions time_before, time_before_eq, time_after, and time_after_eq
are more robust for comparing jiffies against other values.

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
2008-04-24 13:24:54 -04:00
Hans-Christian Egtvedt 3a4e832ccc Generate raw keyboard codes for AVR32 architecture
This patchs adds the AVR32 architecture to the list of archs to generate a
table of raw keyboard keycodes.

Signed-off-by: Hans-Christian Egtvedt <hcegtvedt@atmel.com>
Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
2008-04-19 20:40:06 -04:00
Karl Dahlke 0beb4f6f29 Input: put ledstate in the keyboard notifier
Led state should be part of the key event, like shiftstate, and not
grabbed asynchronously after the fact.

[samuel.thibault@ens-lyon.org: various fixes]

Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
2008-04-15 01:30:32 -04:00
Francisco Alecrim 3eaeb9c951 Input: remove duplicated headers in drivers/char/keyboard.c
drivers/char/keyboard.c: linux/consolemap.h is included more than once.

Signed-off-by: Francisco Alecrim <francisco.alecrim@indt.org.br>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
2008-01-21 01:11:08 -05:00
Dmitry Torokhov f4f37c8ec7 Input: Add proper locking when changing device's keymap
Take dev->event_lock to make sure that we don't race with input_event() and
also force key up event when removing a key from keymap table.

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
2008-01-21 01:11:06 -05:00
Jiri Slaby 7b19ada2ed get rid of input BIT* duplicate defines
get rid of input BIT* duplicate defines

use newly global defined macros for input layer. Also remove includes of
input.h from non-input sources only for BIT macro definiton. Define the
macro temporarily in local manner, all those local definitons will be
removed further in this patchset (to not break bisecting).
BIT macro will be globally defined (1<<x)

Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Cc: <dtor@mail.ru>
Acked-by: Jiri Kosina <jkosina@suse.cz>
Cc: <lenb@kernel.org>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Cc: <perex@suse.cz>
Acked-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Cc: <vernux@us.ibm.com>
Cc: <malattia@linux.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-19 11:53:42 -07:00
Samuel Thibault 41ab4396e1 Console keyboard events and accessibility
Some blind people use a kernel engine called Speakup which uses hardware
synthesis to speak what gets displayed on the screen.  They use the
PC keyboard to control this engine (start/stop, accelerate, ...) and
also need to get keyboard feedback (to make sure to know what they are
typing, the caps lock status, etc.)

Up to now, the way it was done was very ugly.  Below is a patch to add a
notifier list for permitting a far better implementation, see ChangeLog
above for details.

You may wonder why this can't be done at the input layer.  The problem
is that what people want to monitor is the console keyboard, i.e. all
input keyboards that got attached to the console, and with the currently
active keymap (i.e. keysyms, not only keycodes).

This adds a keyboard notifier that such modules can use to get the keyboard
events and possibly eat them, at several stages:

- keycodes: even before translation into keysym.
- unbound keycodes: when no keysym is bound.
- unicode: when the keycode would get translated into a unicode character.
- keysym: when the keycode would get translated into a keysym.
- post_keysym: after the keysym got interpreted, so as to see the result
  (caps lock, etc.)

This also provides access to k_handler so as to permit simulation of
keypresses.

[akpm@linux-foundation.org: various fixes]
Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Cc: Jiri Kosina <jkosina@suse.cz>
Cc: Dmitry Torokhov <dtor@mail.ru>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-19 11:53:33 -07:00
Bill Nottingham 2e8ecb9db0 add CONFIG_VT_UNICODE
As of now, the kernel defaults to non-unicode and XLATE for the keyboard.
We've been changing this in Fedora, but that requires patching the defaults
in the kernel.

The attached introduces CONFIG_VT_UNICODE, which sets the console in
unicode mode by default on boot, including both the virtual terminal and
the keyboard driver.

Signed-off-by: Bill Nottingham <notting@redhat.com>
Cc: Samuel Thibault <samuel.thibault@ens-lyon.org>
Cc: Dmitry Torokhov <dtor@mail.ru>
Cc: Jiri Kosina <jkosina@suse.cz>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-17 08:42:56 -07:00
Samuel Thibault 04c7197650 unicode diacritics support
There have been issues with non-latin1 diacritics and unicode.
http://bugzilla.kernel.org/show_bug.cgi?id=7746

Git 759448f459 `Kernel utf-8 handling'
partly resolved it by adding conversion between diacritics and
unicode. The patch below goes further by just turning diacritics into
unicode, hence providing better future support. The kbd support can be
fetched from
http://bugzilla.kernel.org/attachment.cgi?id=12313

This was tested in all of latin1, latin9, latin2 and unicode with french
and czech dead keys.

Turn the kernel accent_table into unicode, and extend ioctls KDGKBDIACR
and KDSKBDIACR into their equivalents KDGKBDIACRUC and KDSKBDIACR.

New function int conv_uni_to_8bit(u32 uni) for converting unicode into 8bit
_input_.  No, we don't want to store the translation, as it is potentially
sparse and large.

Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Cc: Jan Engelhardt <jengelh@gmx.de>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-17 08:42:52 -07:00
Geert Uytterhoeven 2301060e2b m68k/mac: Make mac_hid_mouse_emulate_buttons() declaration visible
m68k/mac: Make mac_hid_mouse_emulate_buttons() declaration visible

drivers/char/keyboard.c: In function 'kbd_keycode':
drivers/char/keyboard.c:1142: error: implicit declaration of function 'mac_hid_mouse_emulate_buttons'

The forward declaration of mac_hid_mouse_emulate_buttons() is not visible on
m68k because it's hidden in the middle of a big #ifdef block.

Move it to <linux/kbd_kern.h>, correct the type of the second parameter, and
include <linux/kbd_kern.h> where needed.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-08-22 19:52:45 -07:00
Jan Engelhardt 759448f459 Kernel utf-8 handling
This patch fixes dead keys and copy/paste of non-ASCII characters in UTF-8
mode on Linux console.  See more details about the original patch at:
http://chris.heathens.co.nz/linux/utf8.html

Already posted on
	(Oldest) http://lkml.org/lkml/2003/5/31/148
	         http://lkml.org/lkml/2005/12/24/69
	(Recent) http://lkml.org/lkml/2006/8/7/75

[bunk@stusta.de: make drivers/char/selection.c:store_utf8() static]
Signed-off-by: Jan Engelhardt <jengelh@gmx.de>
Cc: Alexander E. Patrakov <patrakov@ums.usu.ru>
Cc: Dmitry Torokhov <dtor@mail.ru>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Cc: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-16 09:05:46 -07:00
Hans de Goede 72a42f242c Input: atkbd - change mapping for e032 from KEY_WWW to KEY_HOMEPAGE
WWW/Homepage key on Microsoft-compatible keyboards generates KEY_WWW
when connected via PS/2 port but KEY_HOMEPAGE when connected via USB.
This patch changes mapping in atkbd to match one in HID driver.

Signed-off-by: Hans de Goede <j.w.r.degoede@hhs.nl>
Acked-by: Vojtech Pavlik <vojtech@suse.cz>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
2007-07-10 00:35:18 -04:00
Milind Arun Choudhary ccc942567e SPIN_LOCK_UNLOCKED cleanup in drivers/char/keyboard
SPIN_LOCK_UNLOCKED cleanup,use __SPIN_LOCK_UNLOCKED instead

Signed-off-by: Milind Arun Choudhary <milindchoudhary@gmail.com>
Cc: Dmitry Torokhov <dtor@mail.ru>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-08 11:15:11 -07:00
Dmitry Torokhov 9e35d20663 Input: keyboard handler - use printk_ratelimit()
Use printk_ratelimit() to protect ourselves from buggy drivers or
devices endlessly generating invalid events.

Suggested by Andrew Morton.

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
2007-04-12 01:30:52 -04:00
Dmitry Torokhov 5b2a08262a Input: rework handle creation code
- consolidate code for binding handlers to a device
 - return error codes from handlers connect() methods back to input
   core and log failures

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
2007-04-12 01:29:46 -04:00
Marvin Raaijmakers c8e4c77277 Input: add getkeycode and setkeycode methods
Allow drivers to implement their own get and set keycode methods. This
will allow drivers to change their keymaps without allocating huge
tables covering entire range of possible scancodes.

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
2007-03-14 22:50:42 -04:00
Eric W. Biederman 7f1f86a0d0 [PATCH] Fix SAK_work workqueue initialization.
Somewhere in the rewrite of the work queues my cleanup of SAK handling
got broken.  Maybe I didn't retest it properly or possibly the API
was changing so fast I missed something.  Regardless currently
triggering a SAK now generates an ugly BUG_ON and kills the kernel.

Thanks to Alexey Dobriyan <adobriyan@openvz.org> for spotting this.

This modifies the use of SAK_work to initialize it when the data
structure it resides in is initialized, and to simply call
schedule_work when we need to generate a SAK.  I update both
data structures that have a SAK_work member for consistency.

All of the old PREPARE_WORK calls that are now gone.

If we call schedule_work again before it has processed it
has generated the first SAK it will simply ignore the duplicate
schedule_work request.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-02-13 16:07:36 -08:00
Eric W. Biederman 8b6312f4dc [PATCH] vt: refactor console SAK processing
This does several things.
- It moves looking up of the current foreground console into process
  context where we can safely take the semaphore that protects this
  operation.
- It uses the new flavor of work queue processing.
- This generates a factor of do_SAK, __do_SAK that runs immediately.
- This calls __do_SAK with the console semaphore held ensuring nothing
  else happens to the console while we process the SAK operation.
- With the console SAK processing moved into process context this
  patch removes the xchg operations that I used to attempt to attomically
  update struct pid, because of the strange locking used in the SAK processing.
  With SAK using the normal console semaphore nothing special is needed.

Cc: Oleg Nesterov <oleg@tv-sign.ru>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-02-11 10:51:24 -08:00
Brandon Philips e52b29c2a6 Input: drivers/char/keyboard.c - small cleanup in k_cur()
To save a char pointer in the final assembly change to alternate string
form.

Signed-off-by: Brandon Philips <brandon@ifup.org>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
2006-11-04 22:09:08 -05:00
David Howells 7d12e780e0 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 15:10:12 +01:00
Linus Torvalds a12f66fccf Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: (35 commits)
  Input: wistron - add support for Acer TravelMate 2424NWXCi
  Input: wistron - fix setting up special buttons
  Input: add KEY_BLUETOOTH and KEY_WLAN definitions
  Input: add new BUS_VIRTUAL bus type
  Input: add driver for stowaway serial keyboards
  Input: make input_register_handler() return error codes
  Input: remove cruft that was needed for transition to sysfs
  Input: fix input module refcounting
  Input: constify input core
  Input: libps2 - rearrange exports
  Input: atkbd - support Microsoft Natural Elite Pro keyboards
  Input: i8042 - disable MUX mode on Toshiba Equium A110
  Input: i8042 - get rid of polling timer
  Input: send key up events at disconnect
  Input: constify psmouse driver
  Input: i8042 - add Amoi to the MUX blacklist
  Input: logips2pp - add sugnature 56 (Cordless MouseMan Wheel), cleanup
  Input: add driver for Touchwin serial touchscreens
  Input: add driver for Touchright serial touchscreens
  Input: add driver for Penmount serial touchscreens
  ...
2006-10-02 08:20:33 -07:00
Eric W. Biederman 81af8d67d4 [PATCH] vt: rework the console spawning variables
This is such a rare path it took me a while to figure out how to test
this after soring out the locking.

This patch does several things.
- The variables used are moved into a structure and declared in vt_kern.h
- A spinlock is added so we don't have SMP races updating the values.
- Instead of raw pid_t value a struct_pid is used to guard against
  pid wrap around issues, if the daemon to spawn a new console dies.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Cc: Oleg Nesterov <oleg@tv-sign.ru>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-10-02 07:57:13 -07:00
Dmitry Torokhov 0612ec4876 Merge rsync://rsync.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 2006-09-19 01:56:44 -04:00
Dmitry Torokhov 4263cf0fac Input: make input_register_handler() return error codes
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
2006-09-14 01:32:39 -04:00
Dmitry Torokhov 66e6611883 Input: constify input core
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
2006-09-14 01:31:59 -04:00
Dmitry Torokhov 22479e1c0d Input: keyboard - change to use kzalloc
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
2006-08-04 22:51:51 -04:00
Dmitry Torokhov 896cdc7b80 Input: keyboard - simplify emulate_raw() implementation
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
2006-07-19 01:14:25 -04:00
Dmitry Torokhov 2b192908b8 Input: keyboard - remove static variable and clean up initialization
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
2006-07-19 01:13:26 -04:00
Dmitry Torokhov 0e739d2876 Input: introduce input_inject_event() function
Create input_inject_event() function which is to be used by input
handlers as opposed to input_event() which is reserved for drivers
implementing input devices. The difference is that if device is
"grabbed" by some process input_inject_event() will ignore events
unless sent from the handle that is currently owns the device.

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
2006-07-06 00:22:43 -04:00