Input: sentelic - document the latest hardware

- Add documentation for the Cx/Dx hardware release;
- Fix wrong register offset for retrieving button information;
- Document programming sequence for page register R/W;
- Document a couple of supported gesture IDs.

Signed-off-by: Tai-hwa Liang <avatar@sentelic.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

1 files changed, 333 insertions, 31 deletions

diff --git a/Documentation/input/sentelic.txt b/Documentation/input/sentelic.txt
index b2ef125b71f8..89251e2a3eba 100644
--- a/Documentation/input/sentelic.txt
+++ b/Documentation/input/sentelic.txt
@@ -1,5 +1,5 @@
-Copyright (C) 2002-2010 Sentelic Corporation.
-Last update: Jan-13-2010
+Copyright (C) 2002-2011 Sentelic Corporation.
+Last update: Dec-07-2011
 
 ==============================================================================
 * Finger Sensing Pad Intellimouse Mode(scrolling wheel, 4th and 5th buttons)
@@ -140,6 +140,7 @@ BYTE  |---------------|BYTE |---------------|BYTE|---------------|BYTE|---------
 Byte 1: Bit7~Bit6 => 00, Normal data packet
                   => 01, Absolute coordination packet
                   => 10, Notify packet
+                  => 11, Normal data packet with on-pad click
         Bit5 => Valid bit, 0 means that the coordinate is invalid or finger up.
                 When both fingers are up, the last two reports have zero valid
                 bit.
@@ -164,6 +165,7 @@ BYTE  |---------------|BYTE |---------------|BYTE|---------------|BYTE|---------
 Byte 1: Bit7~Bit6 => 00, Normal data packet
                   => 01, Absolute coordinates packet
                   => 10, Notify packet
+                  => 11, Normal data packet with on-pad click
         Bit5 => Valid bit, 0 means that the coordinate is invalid or finger up.
                 When both fingers are up, the last two reports have zero valid
                 bit.
@@ -188,6 +190,7 @@ BYTE  |---------------|BYTE |---------------|BYTE|---------------|BYTE|---------
 Byte 1: Bit7~Bit6 => 00, Normal data packet
                   => 01, Absolute coordinates packet
                   => 10, Notify packet
+                  => 11, Normal data packet with on-pad click
         Bit5 => 1
         Bit4 => when in absolute coordinates mode (valid when EN_PKT_GO is 1):
                 0: left button is generated by the on-pad command
@@ -205,7 +208,7 @@ Byte 4: Bit7 => scroll right button
         Bit6 => scroll left button
         Bit5 => scroll down button
         Bit4 => scroll up button
-            * Note that if gesture and additional buttoni (Bit4~Bit7)
+            * Note that if gesture and additional button (Bit4~Bit7)
               happen at the same time, the button information will not
               be sent.
         Bit3~Bit0 => Reserved
@@ -227,6 +230,7 @@ BYTE  |---------------|BYTE |---------------|BYTE|---------------|BYTE|---------
 Byte 1: Bit7~Bit6 => 00, Normal data packet
                   => 01, Absolute coordinates packet
                   => 10, Notify packet
+                  => 11, Normal data packet with on-pad click
         Bit5 => Valid bit, 0 means that the coordinate is invalid or finger up.
                 When both fingers are up, the last two reports have zero valid
                 bit.
@@ -253,6 +257,7 @@ BYTE  |---------------|BYTE |---------------|BYTE|---------------|BYTE|---------
 Byte 1: Bit7~Bit6 => 00, Normal data packet
                   => 01, Absolute coordination packet
                   => 10, Notify packet
+                  => 11, Normal data packet with on-pad click
         Bit5 => Valid bit, 0 means that the coordinate is invalid or finger up.
                 When both fingers are up, the last two reports have zero valid
                 bit.
@@ -279,8 +284,9 @@ BYTE  |---------------|BYTE |---------------|BYTE|---------------|BYTE|---------
 Byte 1: Bit7~Bit6 => 00, Normal data packet
                   => 01, Absolute coordination packet
                   => 10, Notify packet
+                  => 11, Normal data packet with on-pad click
         Bit5 => 1
-        Bit4 => when in absolute coordinate mode (valid when EN_PKT_GO is 1):
+        Bit4 => when in absolute coordinates mode (valid when EN_PKT_GO is 1):
                 0: left button is generated by the on-pad command
                 1: left button is generated by the external button
         Bit3 => 1
@@ -307,6 +313,110 @@ Sample sequence of Multi-finger, Multi-coordinate mode:
         abs pkt 2, ..., notify packet (valid bit == 0)
 
 ==============================================================================
+* Absolute position for STL3888-Cx and STL3888-Dx.
+==============================================================================
+Single Finger, Absolute Coordinate Mode (SFAC)
+   Bit 7 6 5 4 3 2 1 0       7 6 5 4 3 2 1 0      7 6 5 4 3 2 1 0      7 6 5 4 3 2 1 0
+BYTE  |---------------|BYTE |---------------|BYTE|---------------|BYTE|---------------|
+  1   |0|1|0|P|1|M|R|L|  2  |X|X|X|X|X|X|X|X|  3 |Y|Y|Y|Y|Y|Y|Y|Y|  4 |r|l|B|F|X|X|Y|Y|
+      |---------------|     |---------------|    |---------------|    |---------------|
+
+Byte 1: Bit7~Bit6 => 00, Normal data packet
+                  => 01, Absolute coordinates packet
+                  => 10, Notify packet
+        Bit5 => Coordinate mode(always 0 in SFAC mode):
+                0: single-finger absolute coordinates (SFAC) mode
+                1: multi-finger, multiple coordinates (MFMC) mode
+        Bit4 => 0: The LEFT button is generated by on-pad command (OPC)
+                1: The LEFT button is generated by external button
+                Default is 1 even if the LEFT button is not pressed.
+        Bit3 => Always 1, as specified by PS/2 protocol.
+        Bit2 => Middle Button, 1 is pressed, 0 is not pressed.
+        Bit1 => Right Button, 1 is pressed, 0 is not pressed.
+        Bit0 => Left Button, 1 is pressed, 0 is not pressed.
+Byte 2: X coordinate (xpos[9:2])
+Byte 3: Y coordinate (ypos[9:2])
+Byte 4: Bit1~Bit0 => Y coordinate (xpos[1:0])
+        Bit3~Bit2 => X coordinate (ypos[1:0])
+        Bit4 => 4th mouse button(forward one page)
+        Bit5 => 5th mouse button(backward one page)
+        Bit6 => scroll left button
+        Bit7 => scroll right button
+
+Multi Finger, Multiple Coordinates Mode (MFMC):
+   Bit 7 6 5 4 3 2 1 0       7 6 5 4 3 2 1 0      7 6 5 4 3 2 1 0      7 6 5 4 3 2 1 0
+BYTE  |---------------|BYTE |---------------|BYTE|---------------|BYTE|---------------|
+  1   |0|1|1|P|1|F|R|L|  2  |X|X|X|X|X|X|X|X|  3 |Y|Y|Y|Y|Y|Y|Y|Y|  4 |r|l|B|F|X|X|Y|Y|
+      |---------------|     |---------------|    |---------------|    |---------------|
+
+Byte 1: Bit7~Bit6 => 00, Normal data packet
+                  => 01, Absolute coordination packet
+                  => 10, Notify packet
+        Bit5 => Coordinate mode (always 1 in MFMC mode):
+                0: single-finger absolute coordinates (SFAC) mode
+                1: multi-finger, multiple coordinates (MFMC) mode
+        Bit4 => 0: The LEFT button is generated by on-pad command (OPC)
+                1: The LEFT button is generated by external button
+                Default is 1 even if the LEFT button is not pressed.
+        Bit3 => Always 1, as specified by PS/2 protocol.
+        Bit2 => Finger index, 0 is the first finger, 1 is the second finger.
+                If bit 1 and 0 are all 1 and bit 4 is 0, the middle external
+                button is pressed.
+        Bit1 => Right Button, 1 is pressed, 0 is not pressed.
+        Bit0 => Left Button, 1 is pressed, 0 is not pressed.
+Byte 2: X coordinate (xpos[9:2])
+Byte 3: Y coordinate (ypos[9:2])
+Byte 4: Bit1~Bit0 => Y coordinate (xpos[1:0])
+        Bit3~Bit2 => X coordinate (ypos[1:0])
+        Bit4 => 4th mouse button(forward one page)
+        Bit5 => 5th mouse button(backward one page)
+        Bit6 => scroll left button
+        Bit7 => scroll right button
+
+  When one of the two fingers is up, the device will output four consecutive
+MFMC#0 report packets with zero X and Y to represent 1st finger is up or
+four consecutive MFMC#1 report packets with zero X and Y to represent that
+the 2nd finger is up.  On the other hand, if both fingers are up, the device
+will output four consecutive single-finger, absolute coordinate(SFAC) packets
+with zero X and Y.
+
+Notify Packet for STL3888-Cx/Dx
+   Bit 7 6 5 4 3 2 1 0       7 6 5 4 3 2 1 0      7 6 5 4 3 2 1 0      7 6 5 4 3 2 1 0
+BYTE  |---------------|BYTE |---------------|BYTE|---------------|BYTE|---------------|
+  1   |1|0|0|P|1|M|R|L|  2  |C|C|C|C|C|C|C|C|  3 |0|0|F|F|0|0|0|i|  4 |r|l|u|d|0|0|0|0|
+      |---------------|     |---------------|    |---------------|    |---------------|
+
+Byte 1: Bit7~Bit6 => 00, Normal data packet
+                  => 01, Absolute coordinates packet
+                  => 10, Notify packet
+        Bit5 => Always 0
+        Bit4 => 0: The LEFT button is generated by on-pad command(OPC)
+                1: The LEFT button is generated by external button
+                Default is 1 even if the LEFT button is not pressed.
+        Bit3 => 1
+        Bit2 => Middle Button, 1 is pressed, 0 is not pressed.
+        Bit1 => Right Button, 1 is pressed, 0 is not pressed.
+        Bit0 => Left Button, 1 is pressed, 0 is not pressed.
+Byte 2: Message type:
+        0xba => gesture information
+        0xc0 => one finger hold-rotating gesture
+Byte 3: The first parameter for the received message:
+        0xba => gesture ID (refer to the 'Gesture ID' section)
+        0xc0 => region ID
+Byte 4: The second parameter for the received message:
+        0xba => N/A
+        0xc0 => finger up/down information
+
+Sample sequence of Multi-finger, Multi-coordinates mode:
+
+        notify packet (valid bit == 1), MFMC packet 1 (byte 1, bit 2 == 0),
+        MFMC packet 2 (byte 1, bit 2 == 1), MFMC packet 1, MFMC packet 2,
+        ..., notify packet (valid bit == 0)
+
+        That is, when the device is in MFMC mode, the host will receive
+        interleaved absolute coordinate packets for each finger.
+
+==============================================================================
 * FSP Enable/Disable packet
 ==============================================================================
    Bit 7 6 5 4 3 2 1 0       7 6 5 4 3 2 1 0      7 6 5 4 3 2 1 0      7 6 5 4 3 2 1 0
@@ -348,9 +458,10 @@ http://www.computer-engineering.org/ps2mouse/
 ==============================================================================
 1. Identify FSP by reading device ID(0x00) and version(0x01) register
 
-2. Determine number of buttons by reading status2 (0x0b) register
+2a. For FSP version < STL3888 Cx, determine number of buttons by reading
+    the 'test mode status' (0x20) register:
 
-        buttons = reg[0x0b] & 0x30
+        buttons = reg[0x20] & 0x30
 
         if buttons == 0x30 or buttons == 0x20:
                 # two/four buttons
@@ -365,6 +476,10 @@ http://www.computer-engineering.org/ps2mouse/
                 Refer to 'Finger Sensing Pad PS/2 Mouse Intellimouse'
                 section A for packet parsing detail
 
+2b. For FSP version >= STL3888 Cx:
+        Refer to 'Finger Sensing Pad PS/2 Mouse Intellimouse'
+        section A for packet parsing detail (ignore byte 4, bit ~ 7)
+
 ==============================================================================
 * Programming Sequence for Register Reading/Writing
 ==============================================================================
@@ -374,7 +489,7 @@ Register inversion requirement:
   Following values needed to be inverted(the '~' operator in C) before being
 sent to FSP:
 
-        0xe9, 0xee, 0xf2 and 0xff.
+        0xe8, 0xe9, 0xee, 0xf2, 0xf3 and 0xff.
 
 Register swapping requirement:
 
@@ -415,7 +530,18 @@ Register reading sequence:
 
         8. send 0xe9(status request) PS/2 command to FSP;
 
-        9. the response read from FSP should be the requested register value.
+        9. the 4th byte of the response read from FSP should be the
+        requested register value(?? indicates don't care byte):
+
+                host: 0xe9
+                3888: 0xfa (??) (??) (val)
+
+        * Note that since the Cx release, the hardware will return 1's
+        complement of the register value at the 3rd byte of status request
+        result:
+
+                host: 0xe9
+                3888: 0xfa (??) (~val) (val)
 
 Register writing sequence:
 
@@ -465,71 +591,194 @@ Register writing sequence:
 
         9. the register writing sequence is completed.
 
+        * Note that since the Cx release, the hardware will return 1's
+        complement of the register value at the 3rd byte of status request
+        result. Host can optionally send another 0xe9 (status request) PS/2
+        command to FSP at the end of register writing to verify that the
+        register writing operation is successful (?? indicates don't care
+        byte):
+
+                host: 0xe9
+                3888: 0xfa (??) (~val) (val)
+
+==============================================================================
+* Programming Sequence for Page Register Reading/Writing
+==============================================================================
+
+  In order to overcome the limitation of maximum number of registers
+supported, the hardware separates register into different groups called
+'pages.' Each page is able to include up to 255 registers.
+
+  The default page after power up is 0x82; therefore, if one has to get
+access to register 0x8301, one has to use following sequence to switch
+to page 0x83, then start reading/writing from/to offset 0x01 by using
+the register read/write sequence described in previous section.
+
+Page register reading sequence:
+
+        1. send 0xf3 PS/2 command to FSP;
+
+        2. send 0x66 PS/2 command to FSP;
+
+        3. send 0x88 PS/2 command to FSP;
+
+        4. send 0xf3 PS/2 command to FSP;
+
+        5. send 0x83 PS/2 command to FSP;
+
+        6. send 0x88 PS/2 command to FSP;
+
+        7. send 0xe9(status request) PS/2 command to FSP;
+
+        8. the response read from FSP should be the requested page value.
+
+Page register writing sequence:
+
+        1. send 0xf3 PS/2 command to FSP;
+
+        2. send 0x38 PS/2 command to FSP;
+
+        3. send 0x88 PS/2 command to FSP;
+
+        4. send 0xf3 PS/2 command to FSP;
+
+        5. if the page address being written is not required to be
+        inverted(refer to the 'Register inversion requirement' section),
+        goto step 6
+
+        5a. send 0x47 PS/2 command to FSP;
+
+        5b. send the inverted page address to FSP and goto step 9;
+
+        6. if the page address being written is not required to be
+        swapped(refer to the 'Register swapping requirement' section),
+        goto step 7
+
+        6a. send 0x44 PS/2 command to FSP;
+
+        6b. send the swapped page address to FSP and goto step 9;
+
+        7. send 0x33 PS/2 command to FSP;
+
+        8. send the page address to FSP;
+
+        9. the page register writing sequence is completed.
+
+==============================================================================
+* Gesture ID
+==============================================================================
+
+  Unlike other devices which sends multiple fingers' coordinates to host,
+FSP processes multiple fingers' coordinates internally and convert them
+into a 8 bits integer, namely 'Gesture ID.'  Following is a list of
+supported gesture IDs:
+
+        ID      Description
+        0x86    2 finger straight up
+        0x82    2 finger straight down
+        0x80    2 finger straight right
+        0x84    2 finger straight left
+        0x8f    2 finger zoom in
+        0x8b    2 finger zoom out
+        0xc0    2 finger curve, counter clockwise
+        0xc4    2 finger curve, clockwise
+        0x2e    3 finger straight up
+        0x2a    3 finger straight down
+        0x28    3 finger straight right
+        0x2c    3 finger straight left
+        0x38    palm
+
 ==============================================================================
 * Register Listing
 ==============================================================================
 
+  Registers are represented in 16 bits values. The higher 8 bits represent
+the page address and the lower 8 bits represent the relative offset within
+that particular page.  Refer to the 'Programming Sequence for Page Register
+Reading/Writing' section for instructions on how to change current page
+address.
+
 offset  width           default r/w     name
-0x00    bit7~bit0       0x01    RO      device ID
+0x8200  bit7~bit0       0x01    RO      device ID
 
-0x01    bit7~bit0       0xc0    RW      version ID
+0x8201  bit7~bit0               RW      version ID
+                                        0xc1: STL3888 Ax
+                                        0xd0 ~ 0xd2: STL3888 Bx
+                                        0xe0 ~ 0xe1: STL3888 Cx
+                                        0xe2 ~ 0xe3: STL3888 Dx
 
-0x02    bit7~bit0       0x01    RO      vendor ID
+0x8202  bit7~bit0       0x01    RO      vendor ID
 
-0x03    bit7~bit0       0x01    RO      product ID
+0x8203  bit7~bit0       0x01    RO      product ID
 
-0x04    bit3~bit0       0x01    RW      revision ID
+0x8204  bit3~bit0       0x01    RW      revision ID
 
-0x0b                            RO      test mode status 1
-        bit3            1       RO      0: rotate 180 degree, 1: no rotation
+0x820b                                  test mode status 1
+        bit3            1       RO      0: rotate 180 degree
+                                        1: no rotation
+                                        *only supported by H/W prior to Cx
 
-        bit5~bit4               RO      number of buttons
-                        11 => 2, lbtn/rbtn
-                        10 => 4, lbtn/rbtn/scru/scrd
-                        01 => 6, lbtn/rbtn/scru/scrd/scrl/scrr
-                        00 => 6, lbtn/rbtn/scru/scrd/fbtn/bbtn
+0x820f                                  register file page control
+        bit2            0       RW      1: rotate 180 degree
+                                        0: no rotation
+                                        *supported since Cx
 
-0x0f                            RW      register file page control
         bit0            0       RW      1 to enable page 1 register files
+                                        *only supported by H/W prior to Cx
 
-0x10                            RW      system control 1
+0x8210                          RW      system control 1
         bit0            1       RW      Reserved, must be 1
         bit1            0       RW      Reserved, must be 0
-        bit4            1       RW      Reserved, must be 0
-        bit5            0       RW      register clock gating enable
+        bit4            0       RW      Reserved, must be 0
+        bit5            1       RW      register clock gating enable
                                         0: read only, 1: read/write enable
         (Note that following registers does not require clock gating being
         enabled prior to write: 05 06 07 08 09 0c 0f 10 11 12 16 17 18 23 2e
         40 41 42 43.  In addition to that, this bit must be 1 when gesture
         mode is enabled)
 
-0x31                            RW      on-pad command detection
+0x8220                                  test mode status
+        bit5~bit4               RO      number of buttons
+                                        11 => 2, lbtn/rbtn
+                                        10 => 4, lbtn/rbtn/scru/scrd
+                                        01 => 6, lbtn/rbtn/scru/scrd/scrl/scrr
+                                        00 => 6, lbtn/rbtn/scru/scrd/fbtn/bbtn
+                                        *only supported by H/W prior to Cx
+
+0x8231                          RW      on-pad command detection
         bit7            0       RW      on-pad command left button down tag
                                         enable
                                         0: disable, 1: enable
+                                        *only supported by H/W prior to Cx
 
-0x34                            RW      on-pad command control 5
+0x8234                          RW      on-pad command control 5
         bit4~bit0       0x05    RW      XLO in 0s/4/1, so 03h = 0010.1b = 2.5
         (Note that position unit is in 0.5 scanline)
+                                        *only supported by H/W prior to Cx
 
         bit7            0       RW      on-pad tap zone enable
                                         0: disable, 1: enable
+                                        *only supported by H/W prior to Cx
 
-0x35                            RW      on-pad command control 6
+0x8235                          RW      on-pad command control 6
         bit4~bit0       0x1d    RW      XHI in 0s/4/1, so 19h = 1100.1b = 12.5
         (Note that position unit is in 0.5 scanline)
+                                        *only supported by H/W prior to Cx
 
-0x36                            RW      on-pad command control 7
+0x8236                          RW      on-pad command control 7
         bit4~bit0       0x04    RW      YLO in 0s/4/1, so 03h = 0010.1b = 2.5
         (Note that position unit is in 0.5 scanline)
+                                        *only supported by H/W prior to Cx
 
-0x37                            RW      on-pad command control 8
+0x8237                          RW      on-pad command control 8
         bit4~bit0       0x13    RW      YHI in 0s/4/1, so 11h = 1000.1b = 8.5
         (Note that position unit is in 0.5 scanline)
+                                        *only supported by H/W prior to Cx
 
-0x40                            RW      system control 5
+0x8240                          RW      system control 5
         bit1            0       RW      FSP Intellimouse mode enable
                                         0: disable, 1: enable
+                                        *only supported by H/W prior to Cx
 
         bit2            0       RW      movement + abs. coordinate mode enable
                                         0: disable, 1: enable
@@ -537,6 +786,7 @@ offset	width		default	r/w	name
         bit 1 is not set. However, the format is different from that of bit 1.
         In addition, when bit 1 and bit 2 are set at the same time, bit 2 will
         override bit 1.)
+                                        *only supported by H/W prior to Cx
 
         bit3            0       RW      abs. coordinate only mode enable
                                         0: disable, 1: enable
@@ -544,9 +794,11 @@ offset	width		default	r/w	name
         bit 1 is not set. However, the format is different from that of bit 1.
         In addition, when bit 1, bit 2 and bit 3 are set at the same time,
         bit 3 will override bit 1 and 2.)
+                                        *only supported by H/W prior to Cx
 
         bit5            0       RW      auto switch enable
                                         0: disable, 1: enable
+                                        *only supported by H/W prior to Cx
 
         bit6            0       RW      G0 abs. + notify packet format enable
                                         0: disable, 1: enable
@@ -554,18 +806,68 @@ offset	width		default	r/w	name
         bit 2 and 3.  That is, if any of those bit is 1, host will receive
         absolute coordinates; otherwise, host only receives packets with
         relative coordinate.)
+                                        *only supported by H/W prior to Cx
 
         bit7            0       RW      EN_PS2_F2: PS/2 gesture mode 2nd
                                         finger packet enable
                                         0: disable, 1: enable
+                                        *only supported by H/W prior to Cx
 
-0x43                            RW      on-pad control
+0x8243                          RW      on-pad control
         bit0            0       RW      on-pad control enable
                                         0: disable, 1: enable
         (Note that if this bit is cleared, bit 3/5 will be ineffective)
+                                        *only supported by H/W prior to Cx
 
         bit3            0       RW      on-pad fix vertical scrolling enable
                                         0: disable, 1: enable
+                                        *only supported by H/W prior to Cx
 
         bit5            0       RW      on-pad fix horizontal scrolling enable
                                         0: disable, 1: enable
+                                        *only supported by H/W prior to Cx
+
+0x8290                          RW      software control register 1
+        bit0            0       RW      absolute coordination mode
+                                        0: disable, 1: enable
+                                        *supported since Cx
+
+        bit1            0       RW      gesture ID output
+                                        0: disable, 1: enable
+                                        *supported since Cx
+
+        bit2            0       RW      two fingers' coordinates output
+                                        0: disable, 1: enable
+                                        *supported since Cx
+
+        bit3            0       RW      finger up one packet output
+                                        0: disable, 1: enable
+                                        *supported since Cx
+
+        bit4            0       RW      absolute coordination continuous mode
+                                        0: disable, 1: enable
+                                        *supported since Cx
+
+        bit6~bit5       00      RW      gesture group selection
+                                        00: basic
+                                        01: suite
+                                        10: suite pro
+                                        11: advanced
+                                        *supported since Cx
+
+        bit7            0       RW      Bx packet output compatible mode
+                                        0: disable, 1: enable                                   *supported since Cx
+                                        *supported since Cx
+
+
+0x833d                          RW      on-pad command control 1
+        bit7            1       RW      on-pad command detection enable
+                                        0: disable, 1: enable
+                                        *supported since Cx
+
+0x833e                          RW      on-pad command detection
+        bit7            0       RW      on-pad command left button down tag
+                                        enable. Works only in H/W based PS/2
+                                        data packet mode.
+                                        0: disable, 1: enable
+                                        *supported since Cx