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Commit 84ce6faf authored by Mauro Carvalho Chehab's avatar Mauro Carvalho Chehab Committed by Dmitry Torokhov
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Input: ALPS - convert documentation into ReST format 



Turn ALPS documentation into a valid ReST file, so it could be parsed with
Sphinx.

Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: default avatarDmitry Torokhov <dmitry.torokhov@gmail.com>
parent b0f355f3

Documentation/input/alps.txt

+26 −17
Original line number Diff line number Diff line 
----------------------

ALPS Touchpad Protocol

----------------------
@@ -78,7 +79,7 @@ of the EC response. 
Packet Format

-------------



In the following tables, the following notation is used.

In the following tables, the following notation is used::



 CAPITALS = stick, miniscules = touchpad
@@ -88,6 +89,8 @@ extra buttons, stick buttons on a dualpoint, etc. 
PS/2 packet format

------------------



::



 byte 0:  0    0 YSGN XSGN    1    M    R    L

 byte 1: X7   X6   X5   X4   X3   X2   X1   X0

 byte 2: Y7   Y6   Y5   Y4   Y3   Y2   Y1   Y0
@@ -99,7 +102,9 @@ are on the touchpad, the M R L bits signal the combined status of both the 
pointingstick and touchpad buttons.



ALPS Absolute Mode - Protocol Version 1

--------------------------------------

---------------------------------------



::



 byte 0:  1    0    0    0    1   x9   x8   x7

 byte 1:  0   x6   x5   x4   x3   x2   x1   x0
@@ -111,6 +116,8 @@ ALPS Absolute Mode - Protocol Version 1 
ALPS Absolute Mode - Protocol Version 2

---------------------------------------



::



 byte 0:  1    ?    ?    ?    1  PSM  PSR  PSL

 byte 1:  0   x6   x5   x4   x3   x2   x1   x0

 byte 2:  0  x10   x9   x8   x7    ?  fin  ges
@@ -127,6 +134,8 @@ and PSL bits. 
Dualpoint device -- interleaved packet format

---------------------------------------------



::



 byte 0:    1    1    0    0    1    1    1    1

 byte 1:    0   x6   x5   x4   x3   x2   x1   x0

 byte 2:    0  x10   x9   x8   x7    0  fin  ges
@@ -149,7 +158,7 @@ ALPS protocol version 3 has three different packet formats. The first two are 
associated with touchpad events, and the third is associated with trackstick

events.



The first type is the touchpad position packet.

The first type is the touchpad position packet::



 byte 0:    1    ?   x1   x0    1    1    1    1

 byte 1:    0  x10   x9   x8   x7   x6   x5   x4
@@ -165,7 +174,7 @@ The second packet type contains bitmaps representing the x and y axes. In the 
bitmaps a given bit is set if there is a finger covering that position on the

given axis. Thus the bitmap packet can be used for low-resolution multi-touch

data, although finger tracking is not possible.  This packet also encodes the

number of contacts (f1 and f0 in the table below).

number of contacts (f1 and f0 in the table below)::



 byte 0:    1    1   x1   x0    1    1    1    1

 byte 1:    0   x8   x7   x6   x5   x4   x3   x2
@@ -178,7 +187,7 @@ This packet only appears after a position packet with the mt bit set, and 
usually only appears when there are two or more contacts (although

occasionally it's seen with only a single contact).



The final v3 packet type is the trackstick packet.

The final v3 packet type is the trackstick packet::



 byte 0:    1    1   x7   y7    1    1    1    1

 byte 1:    0   x6   x5   x4   x3   x2   x1   x0
@@ -190,7 +199,7 @@ The final v3 packet type is the trackstick packet. 
ALPS Absolute Mode - Protocol Version 4

---------------------------------------



Protocol version 4 has an 8-byte packet format.

Protocol version 4 has an 8-byte packet format::



 byte 0:    1    ?   x1   x0    1    1    1    1

 byte 1:    0  x10   x9   x8   x7   x6   x5   x4
@@ -203,7 +212,7 @@ Protocol version 4 has an 8-byte packet format. 


The last two bytes represent a partial bitmap packet, with 3 full packets

required to construct a complete bitmap packet.  Once assembled, the 6-byte

bitmap packet has the following format:

bitmap packet has the following format::



 byte 0:    0    1   x7   x6   x5   x4   x3   x2

 byte 1:    0   x1   x0   y4   y3   y2   y1   y0
@@ -238,7 +247,7 @@ decode. It uses the same alps_process_touchpad_packet_v3 call with a 
specialized decode_fields function pointer to correctly interpret the

packets.  This appears to only be used by the Dolphin devices.



For single-touch, the 6-byte packet format is:

For single-touch, the 6-byte packet format is::



 byte 0:    1    1    0    0    1    0    0    0

 byte 1:    0   x6   x5   x4   x3   x2   x1   x0
@@ -247,7 +256,7 @@ For single-touch, the 6-byte packet format is: 
 byte 4:   y10  y9   y8   y7  x10   x9   x8   x7

 byte 5:    0   z6   z5   z4   z3   z2   z1   z0



For mt, the format is:

For mt, the format is::



 byte 0:    1    1    1    n3   1   n2   n1   x24

 byte 1:    1   y7   y6    y5  y4   y3   y2    y1
@@ -259,7 +268,7 @@ For mt, the format is: 
ALPS Absolute Mode - Protocol Version 6

---------------------------------------



For trackstick packet, the format is:

For trackstick packet, the format is::



 byte 0:    1    1    1    1    1    1    1    1

 byte 1:    0   X6   X5   X4   X3   X2   X1   X0
@@ -268,7 +277,7 @@ For trackstick packet, the format is: 
 byte 4:   Z7   Z6   Z5   Z4   Z3   Z2   Z1   Z0

 byte 5:    0    1    1    1    1    1    1    1



For touchpad packet, the format is:

For touchpad packet, the format is::



 byte 0:    1    1    1    1    1    1    1    1

 byte 1:    0    0    0    0   x3   x2   x1   x0
@@ -282,7 +291,7 @@ For touchpad packet, the format is: 
ALPS Absolute Mode - Protocol Version 7

---------------------------------------



For trackstick packet, the format is:

For trackstick packet, the format is::



 byte 0:    0    1    0    0    1    0    0    0

 byte 1:    1    1    *    *    1    M    R    L
@@ -291,7 +300,7 @@ For trackstick packet, the format is: 
 byte 4:   Y7    0   Y5   Y4   Y3    1    1    0

 byte 5:  T&P    0   Z5   Z4   Z3   Z2   Z1   Z0



For touchpad packet, the format is:

For touchpad packet, the format is::



         packet-fmt     b7     b6     b5     b4     b3     b2     b1     b0

 byte 0: TWO & MULTI     L      1      R      M      1   Y0-2   Y0-1   Y0-0
@@ -328,7 +337,7 @@ 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):

Touchpad packet (APD = 0x2)::



           b7   b6   b5   b4   b3   b2   b1   b0

 byte 0:  SWM  SWR  SWL    1    1    0    0   X7
@@ -340,7 +349,7 @@ Touchpad packet (APD = 0x2): 


SWM, SWR, SWL: Middle, Right, and Left button states



Touchpad 1 Finger packet (APD = 0x0):

Touchpad 1 Finger packet (APD = 0x0)::



           b7   b6   b5   b4   b3   b2   b1   b0

 byte 0:  SWM  SWR  SWL    1    1   X2   X1   X0
@@ -353,7 +362,7 @@ Touchpad 1 Finger packet (APD = 0x0): 
TAPF: ???

LFB:  ???



Touchpad 2 Finger packet (APD = 0x1):

Touchpad 2 Finger packet (APD = 0x1)::



           b7   b6   b5   b4   b3   b2   b1   b0

 byte 0:  SWM  SWR  SWL    1    1  AX6  AX5  AX4
@@ -365,7 +374,7 @@ Touchpad 2 Finger packet (APD = 0x1): 


CONT: A 3-or-4 Finger packet is to follow



Touchpad 3-or-4 Finger packet (APD = 0x3):

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