summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
-rw-r--r--payloads/libpayload/drivers/keyboard.c9
1 files changed, 7 insertions, 2 deletions
diff --git a/payloads/libpayload/drivers/keyboard.c b/payloads/libpayload/drivers/keyboard.c
index 0bf7c56161..95827463ca 100644
--- a/payloads/libpayload/drivers/keyboard.c
+++ b/payloads/libpayload/drivers/keyboard.c
@@ -175,11 +175,10 @@ static void keyboard_cmd(unsigned char cmd, unsigned char val)
while (inb(0x64) & 2);
}
-
int keyboard_havechar(void)
{
unsigned char c = inb(0x64);
- return c & 1;
+ return (c == 0xFF) ? 0 : c & 1;
}
unsigned char keyboard_get_scancode(void)
@@ -332,6 +331,12 @@ void keyboard_init(void)
u8 mode;
map = &keyboard_layouts[0];
+ /* If 0x64 returns 0xff, then we have no keyboard
+ * controller */
+
+ if (inb(0x64) == 0xFF)
+ return;
+
/* Empty keyboard buffer */
while (keyboard_havechar()) keyboard_getchar();