diff options
Diffstat (limited to 'Documentation/input/alps.txt')
| -rw-r--r-- | Documentation/input/alps.txt | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/Documentation/input/alps.txt b/Documentation/input/alps.txt index 92ae734c00c3..c86f2f1ae4f6 100644 --- a/Documentation/input/alps.txt +++ b/Documentation/input/alps.txt @@ -58,7 +58,7 @@ To exit command mode, PSMOUSE_CMD_SETSTREAM (EA) is sent to the touchpad. While in command mode, register addresses can be set by first sending a specific command, either EC for v3 devices or F5 for v4 devices. Then the address is sent one nibble at a time, where each nibble is encoded as a -command with optional data. This enoding differs slightly between the v3 and +command with optional data. This encoding differs slightly between the v3 and v4 protocols. Once an address has been set, the addressed register can be read by sending @@ -94,6 +94,10 @@ PS/2 packet format Note that the device never signals overflow condition. +For protocol version 2 devices when the trackpoint is used, and no fingers +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 -------------------------------------- @@ -107,7 +111,7 @@ ALPS Absolute Mode - Protocol Version 1 ALPS Absolute Mode - Protocol Version 2 --------------------------------------- - byte 0: 1 ? ? ? 1 ? ? ? + 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 byte 3: 0 y9 y8 y7 1 M R L @@ -115,7 +119,8 @@ ALPS Absolute Mode - Protocol Version 2 byte 5: 0 z6 z5 z4 z3 z2 z1 z0 Protocol Version 2 DualPoint devices send standard PS/2 mouse packets for -the DualPoint Stick. +the DualPoint Stick. For non interleaved dualpoint devices the pointingstick +buttons get reported separately in the PSM, PSR and PSL bits. Dualpoint device -- interleaved packet format --------------------------------------------- @@ -139,7 +144,7 @@ ALPS Absolute Mode - Protocol Version 3 --------------------------------------- ALPS protocol version 3 has three different packet formats. The first two are -associated with touchpad events, and the third is associatd with trackstick +associated with touchpad events, and the third is associated with trackstick events. The first type is the touchpad position packet. |