diff options
Diffstat (limited to 'drivers/input/i8042.c')
| -rw-r--r-- | drivers/input/i8042.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/drivers/input/i8042.c b/drivers/input/i8042.c index 83b1bf46e..c3bc5360c 100644 --- a/drivers/input/i8042.c +++ b/drivers/input/i8042.c @@ -313,6 +313,13 @@ static unsigned char ext_key_map[] = { 0x00 /* map end */ }; +/******************************************************************************/ + +static int kbd_controller_present(void) +{ + return in8(I8042_STATUS_REG) != 0xff; +} + /******************************************************************************* * * i8042_kbd_init - reset keyboard and init state flags @@ -322,6 +329,9 @@ int i8042_kbd_init(void) int keymap, try; char *penv; + if (!kbd_controller_present()) + return -1; + #ifdef CONFIG_USE_CPCIDVI penv = getenv("console"); if (penv != NULL) { @@ -603,7 +613,7 @@ static int kbd_input_empty(void) while ((in8(I8042_STATUS_REG) & 0x02) && kbdTimeout--) udelay(1000); - return kbdTimeout; + return kbdTimeout != -1; } /******************************************************************************/ |