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| author | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2018-01-02 23:03:02 +0300 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2018-02-03 03:50:24 +0300 |
| commit | 08be954b7a7de6742d3d47e4dc20e3b086410761 (patch) | |
| tree | 78d495c68adc377fbaf5cdbc4b7e839de9cd052e /drivers/input/serio/libps2.c | |
| parent | 3a92dd331f90a33e0f0962b981577eb5078419c4 (diff) | |
| download | linux-08be954b7a7de6742d3d47e4dc20e3b086410761.tar.xz | |
Input: psmouse - move sliced command implementation to libps2
In preparation to adding some debugging statements to PS/2 control
sequences let's move psmouse_sliced_command() into libps2 and rename it
to ps2_sliced_command().
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'drivers/input/serio/libps2.c')
| -rw-r--r-- | drivers/input/serio/libps2.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/drivers/input/serio/libps2.c b/drivers/input/serio/libps2.c index c3712f0a47b5..e96ae477f0b5 100644 --- a/drivers/input/serio/libps2.c +++ b/drivers/input/serio/libps2.c @@ -270,6 +270,38 @@ int ps2_command(struct ps2dev *ps2dev, u8 *param, unsigned int command) EXPORT_SYMBOL(ps2_command); /* + * ps2_sliced_command() sends an extended PS/2 command to the mouse + * using sliced syntax, understood by advanced devices, such as Logitech + * or Synaptics touchpads. The command is encoded as: + * 0xE6 0xE8 rr 0xE8 ss 0xE8 tt 0xE8 uu where (rr*64)+(ss*16)+(tt*4)+uu + * is the command. + */ + +int ps2_sliced_command(struct ps2dev *ps2dev, u8 command) +{ + int i; + int retval; + + ps2_begin_command(ps2dev); + + retval = __ps2_command(ps2dev, NULL, PS2_CMD_SETSCALE11); + if (retval) + goto out; + + for (i = 6; i >= 0; i -= 2) { + u8 d = (command >> i) & 3; + retval = __ps2_command(ps2dev, &d, PS2_CMD_SETRES); + if (retval) + break; + } + +out: + ps2_end_command(ps2dev); + return retval; +} +EXPORT_SYMBOL(ps2_sliced_command); + +/* * ps2_init() initializes ps2dev structure */ |