[PATCH] serio_raw: add support for translated (SERIO_I8042XL) ports

serio_raw only binds to non-translated devices. Enable serio_raw to
bind to normal (translated) keyboards which can have non-standard
extensions (like POS Keyboards). With this it is possible to send
commands to the device over /dev/serio_raw<n>.

Signed-off-by: Niels de Vos <redacted>
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---
In ReplyTo: "[RFC][PATCH] POSKeyboard driver for exclusive keyboard access"

On Fri, Aug 22, 2008 at 8:02 PM, Dmitry Torokhov
[off-list ref] wrote:

Hi Niels,

On Fri, Aug 22, 2008 at 06:17:28PM +0200, Niels de Vos wrote:

quoted

This new driver makes it possible for middleware like JavaPOS to use
a POSKeyboard (connected to PS/2) with exclusive access. This is
required by the UnifiedPOS Specification which is available from
http://www.nrf-arts.org/UnifiedPOS. Any middleware using this driver
should implement the full exception-handling in user-space. Therefor
it is possible to use specific POS-extensions of POSKeyboards, without
abusing other keyboard-drivers.

Opening /dev/poskeyboard will route all scancodes to this device. The
scancodes will not be processes by the input-subsystem anymore. Reading
/dev/poskeyboard results in receiving the scancodes as raw data for
further processing by the reader. Sending commands to the hardware can
be done by writing to /dev/poskeyboard.

If the driver is loaded and /dev/poskeyboard is not opened, all
scancodes are given to the input-subsystem. This allows 'normal' use of
the keyboard.

Making the driver active involves some commands like the following:
   echo -n serio1 > /sys/bus/serio/drivers/atkbd/unbind
   echo -n serio1 > /sys/bus/serio/drivers/poskbd/bind

It seems you have just reimplemented serio_raw driver, therefore NAK.
Right now serio_raw is limited to untranslated ports but adding
SERIO_I8042XL signature should be easy.

---

diff --git a/drivers/input/serio/serio_raw.c b/drivers/input/serio/serio_raw.c
index c9397c8..470770c 100644
--- a/drivers/input/serio/serio_raw.c
+++ b/drivers/input/serio/serio_raw.c

@@ -373,6 +373,12 @@ static struct serio_device_id serio_raw_serio_ids[] = {
                .id     = SERIO_ANY,
                .extra  = SERIO_ANY,
        },
+       {
+               .type   = SERIO_8042_XL,
+               .proto  = SERIO_ANY,
+               .id     = SERIO_ANY,
+               .extra  = SERIO_ANY,
+       },
        { 0 }
 };