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Input: alps - document stick behavior for protocol V2
Document that protocol V2 uses standard (bare) PS/2 mouse packets for the
DualPoint stick.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-By: Pali Rohár <pali.rohar@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
authored by Hans de Goede and committed by Dmitry Torokhov 58d8a3be e3a79212
+8
Documentation/input/alps.txt
+8
Documentation/input/alps.txt
···
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byte 4: 0 y6 y5 y4 y3 y2 y1 y0
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byte 5: 0 z6 z5 z4 z3 z2 z1 z0
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Dualpoint device -- interleaved packet format
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---------------------------------------------
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···
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byte 6: 0 y9 y8 y7 1 m r l
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byte 7: 0 y6 y5 y4 y3 y2 y1 y0
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byte 8: 0 z6 z5 z4 z3 z2 z1 z0
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ALPS Absolute Mode - Protocol Version 3
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---------------------------------------
···
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byte 4: 0 y6 y5 y4 y3 y2 y1 y0
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byte 5: 0 z6 z5 z4 z3 z2 z1 z0
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+
Protocol Version 2 DualPoint devices send standard PS/2 mouse packets for
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the DualPoint Stick.
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+
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Dualpoint device -- interleaved packet format
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---------------------------------------------
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···
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byte 6: 0 y9 y8 y7 1 m r l
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byte 7: 0 y6 y5 y4 y3 y2 y1 y0
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byte 8: 0 z6 z5 z4 z3 z2 z1 z0
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+
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Devices which use the interleaving format normally send standard PS/2 mouse
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packets for the DualPoint Stick + ALPS Absolute Mode packets for the
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touchpad, switching to the interleaved packet format when both the stick and
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the touchpad are used at the same time.
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ALPS Absolute Mode - Protocol Version 3
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---------------------------------------