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ps2_drv: reset mouse at startup

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This patch replaces the set-defaults command by a reset command, which
is needed to use the Lenovo x250 trackpoint. (original patch by
Christian Prochaska)
This commit is contained in:
Norman Feske 2017-04-19 17:30:09 +02:00 committed by Christian Helmuth
parent 61551e4d76
commit 7729398105
1 changed files with 7 additions and 2 deletions
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9
repos/os/src/drivers/input/spec/ps2/ps2_mouse.h
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@ -31,6 +31,7 @@ class Ps2::Mouse : public Input_driver
CMD_ENABLE_STREAM = 0xf4, CMD_ENABLE_STREAM = 0xf4,
CMD_DISABLE_STREAM = 0xf5, CMD_DISABLE_STREAM = 0xf5,
CMD_SET_DEFAULTS = 0xf6, CMD_SET_DEFAULTS = 0xf6,
CMD_RESET = 0xff,
}; };
enum Return enum Return
@ -174,9 +175,13 @@ class Ps2::Mouse : public Input_driver
void reset() void reset()
{ {
_aux.write(CMD_SET_DEFAULTS); _aux.write(CMD_RESET);
if (_aux.read() != RET_ACK) if (_aux.read() != RET_ACK)
Genode::warning("could not set defaults"); Genode::warning("could not reset mouse (missing ack)");
if (_aux.read() != 0xaa)
Genode::warning("could not reset mouse (unexpected response)");
if (_aux.read() != 0x00)
Genode::warning("could not reset mouse (unexpected secondary response)");
_aux.write(CMD_ENABLE_STREAM); _aux.write(CMD_ENABLE_STREAM);
if (_aux.read() != RET_ACK) if (_aux.read() != RET_ACK)