diff options
Diffstat (limited to 'payloads/libpayload/drivers/i8042')
| -rw-r--r-- | payloads/libpayload/drivers/i8042/keyboard.c | 17 |
1 files changed, 9 insertions, 8 deletions
diff --git a/payloads/libpayload/drivers/i8042/keyboard.c b/payloads/libpayload/drivers/i8042/keyboard.c index 42d4fdccf5..46afdc03f0 100644 --- a/payloads/libpayload/drivers/i8042/keyboard.c +++ b/payloads/libpayload/drivers/i8042/keyboard.c @@ -172,6 +172,12 @@ static struct layout_maps keyboard_layouts[] = { #endif }; +static void keyboard_drain_input(void) +{ + while (i8042_data_ready_ps2()) + (void)i8042_read_data_ps2(); +} + static bool keyboard_cmd(unsigned char cmd) { const uint64_t timeout_us = cmd == I8042_KBCMD_RESET ? 1*1000*1000 : 200*1000; @@ -368,9 +374,7 @@ void keyboard_init(void) if (!i8042_probe() || !i8042_has_ps2()) return; - /* Empty keyboard buffer */ - while (keyboard_havechar()) - keyboard_getchar(); + keyboard_drain_input(); /* Enable first PS/2 port */ i8042_cmd(I8042_CMD_EN_KB); @@ -400,9 +404,7 @@ void keyboard_disconnect(void) if (!i8042_has_ps2()) return; - /* Empty keyboard buffer */ - while (keyboard_havechar()) - keyboard_getchar(); + keyboard_drain_input(); /* Disable scanning */ keyboard_cmd(I8042_KBCMD_DEFAULT_DIS); @@ -411,8 +413,7 @@ void keyboard_disconnect(void) i8042_cmd(I8042_CMD_DIS_KB); /* Hand off with empty buffer */ - while (keyboard_havechar()) - keyboard_getchar(); + keyboard_drain_input(); /* Release keyboard controller driver */ i8042_close(); |