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Input: ALPS - add V8 protocol documentation 

Tested-by: Michal Hocko <mhocko@suse.com>
Signed-off-by: Ben Gamari <ben@smart-cactus.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Ben Gamari 2016-10-04 11:45:17 -07:00 committed by Dmitry Torokhov
parent aeaa881f9b
commit 574a62c93a
1 changed files with 57 additions and 0 deletions
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Documentation/input/alps.txt
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@ -319,3 +319,60 @@ For touchpad packet, the format is:
otherwise byte 0 bit 4 must be set and byte 0/4/5 are
in NEW fmt
F: Number of fingers - 3, 0 means 3 fingers, 1 means 4 ...
ALPS Absolute Mode - Protocol Version 8
---------------------------------------
Spoken by SS4 (73 03 14) and SS5 (73 03 28) hardware.
The packet type is given by the APD field, bits 4-5 of byte 3.
Touchpad packet (APD = 0x2):
b7 b6 b5 b4 b3 b2 b1 b0
byte 0: SWM SWR SWL 1 1 0 0 X7
byte 1: 0 X6 X5 X4 X3 X2 X1 X0
byte 2: 0 Y6 Y5 Y4 Y3 Y2 Y1 Y0
byte 3: 0 T&P 1 0 1 0 0 Y7
byte 4: 0 Z6 Z5 Z4 Z3 Z2 Z1 Z0
byte 5: 0 0 0 0 0 0 0 0
SWM, SWR, SWL: Middle, Right, and Left button states
Touchpad 1 Finger packet (APD = 0x0):
b7 b6 b5 b4 b3 b2 b1 b0
byte 0: SWM SWR SWL 1 1 X2 X1 X0
byte 1: X9 X8 X7 1 X6 X5 X4 X3
byte 2: 0 X11 X10 LFB Y3 Y2 Y1 Y0
byte 3: Y5 Y4 0 0 1 TAPF2 TAPF1 TAPF0
byte 4: Zv7 Y11 Y10 1 Y9 Y8 Y7 Y6
byte 5: Zv6 Zv5 Zv4 0 Zv3 Zv2 Zv1 Zv0
TAPF: ???
LFB: ???
Touchpad 2 Finger packet (APD = 0x1):
b7 b6 b5 b4 b3 b2 b1 b0
byte 0: SWM SWR SWL 1 1 AX6 AX5 AX4
byte 1: AX11 AX10 AX9 AX8 AX7 AZ1 AY4 AZ0
byte 2: AY11 AY10 AY9 CONT AY8 AY7 AY6 AY5
byte 3: 0 0 0 1 1 BX6 BX5 BX4
byte 4: BX11 BX10 BX9 BX8 BX7 BZ1 BY4 BZ0
byte 5: BY11 BY10 BY9 0 BY8 BY7 BY5 BY5
CONT: A 3-or-4 Finger packet is to follow
Touchpad 3-or-4 Finger packet (APD = 0x3):
b7 b6 b5 b4 b3 b2 b1 b0
byte 0: SWM SWR SWL 1 1 AX6 AX5 AX4
byte 1: AX11 AX10 AX9 AX8 AX7 AZ1 AY4 AZ0
byte 2: AY11 AY10 AY9 OVF AY8 AY7 AY6 AY5
byte 3: 0 0 1 1 1 BX6 BX5 BX4
byte 4: BX11 BX10 BX9 BX8 BX7 BZ1 BY4 BZ0
byte 5: BY11 BY10 BY9 0 BY8 BY7 BY5 BY5
OVF: 5th finger detected