linux.git/drivers/input/evdev.c, branch v3.7-rc2

Input: extend the number of event (and other) devices

2012-10-08T16:37:55+00:00

Extend the amount of character devices, such as eventX, mouseX and jsX,
from a hard limit of 32 per input handler to about 1024 shared across
all handlers.

To be compatible with legacy installations input handlers will start
creating char devices with minors in their legacy range, however once
legacy range is exhausted they will start allocating minors from the
dynamic range 256-1024.

Reviewed-by: David Herrmann 
Signed-off-by: Dmitry Torokhov

Input: evdev - Add the events() callback

2012-09-19T17:50:18+00:00

By sending a full frame of events at the same time, the irqsoff
latency at heavy load is brought down from 200 us to 100 us.

Cc: Daniel Kurtz 
Tested-by: Benjamin Tissoires 
Tested-by: Ping Cheng 
Acked-by: Dmitry Torokhov 
Signed-off-by: Henrik Rydberg

Input: Break out MT data

2012-09-19T17:50:17+00:00

Move all MT-related things to a separate place. This saves some
bytes for non-mt input devices, and prepares for new MT features.

Reviewed-and-tested-by: Benjamin Tissoires 
Tested-by: Ping Cheng 
Acked-by: Dmitry Torokhov 
Signed-off-by: Henrik Rydberg

Input: evdev - properly handle read/write with count 0

2012-05-02T07:23:58+00:00

According to the standard count 0 is special - no IO should happen but we
can check error conditions (device gone away, etc), and return 0 if there
are no errors. We used to return -EINVAL instead and we also could return 0
if an event was "stolen" by another thread.

Signed-off-by: Dmitry Torokhov

Input: evdev - properly access RCU-protected 'grab' data

2012-05-02T07:23:14+00:00

We should use rcu_dereference_protected() when checking if given client
is the one that grabbed the device. This fixes warnings produced by
sparse.

Signed-off-by: Dmitry Torokhov

Merge branch 'next' into for-linus

2012-03-20T00:02:01+00:00

Merge branch 'for-next' of github.com:rydberg/linux into next

2012-03-09T18:56:35+00:00

Merge commit 'v3.3-rc6' into next

2012-03-09T18:55:17+00:00

Input: evdev - fix variable initialisation

2012-02-24T08:52:43+00:00

Commit 509f87c5f564 (evdev - do not block waiting for an event if fd
is nonblock) created a code path were it was possible to use retval
uninitialized.

This could lead to the xorg evdev input driver getting corrupt data
and refusing to work with log messages like
	AUO-Pixcir touchscreen: Read error: Success
	sg060_keys: Read error: Success
	AUO-Pixcir touchscreen: Read error: Success
	sg060_keys: Read error: Success
(for drivers auo-pixcir-ts and gpio-keys).

Signed-off-by: Heiko Stuebner 
Acked-by: Dima Zavin 
Signed-off-by: Dmitry Torokhov

Input: Add EVIOC mechanism for MT slots

2012-02-09T08:40:57+00:00

This patch adds the ability to extract MT slot data via a new ioctl,
EVIOCGMTSLOTS. The function returns an array of slot values for the
specified ABS_MT event type.

Example of user space usage:

struct { unsigned code; int values[64]; } req;
req.code = ABS_MT_POSITION_X;
if (ioctl(fd, EVIOCGMTSLOTS(sizeof(req)), &req) < 0)
	return -1;
for (i = 0; i < 64; i++)
	printf("slot %d: %d\n", i, req.values[i]);

Reviewed-by: Chase Douglas 
Signed-off-by: Henrik Rydberg