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-rw-r--r--payloads/libpayload/drivers/i8042/keyboard.c33
1 files changed, 31 insertions, 2 deletions
diff --git a/payloads/libpayload/drivers/i8042/keyboard.c b/payloads/libpayload/drivers/i8042/keyboard.c
index cb386e919f..91a51bb0ee 100644
--- a/payloads/libpayload/drivers/i8042/keyboard.c
+++ b/payloads/libpayload/drivers/i8042/keyboard.c
@@ -253,6 +253,31 @@ static enum keyboard_state {
STATE_IGNORE,
} keyboard_state;
+#define STATE_NAMES_ENTRY(name) [STATE_##name] = #name
+static const char *const state_names[] = {
+ STATE_NAMES_ENTRY(INIT),
+ STATE_NAMES_ENTRY(SIMPLIFIED_INIT),
+ STATE_NAMES_ENTRY(DISABLE_SCAN),
+ STATE_NAMES_ENTRY(DRAIN_INPUT),
+ STATE_NAMES_ENTRY(DISABLE_TRANSLATION),
+ STATE_NAMES_ENTRY(START_SELF_TEST),
+ STATE_NAMES_ENTRY(SELF_TEST),
+ STATE_NAMES_ENTRY(CONFIGURE),
+ STATE_NAMES_ENTRY(CONFIGURE_SET1),
+ STATE_NAMES_ENTRY(ENABLE_TRANSLATION),
+ STATE_NAMES_ENTRY(ENABLE_SCAN),
+ STATE_NAMES_ENTRY(RUNNING),
+ STATE_NAMES_ENTRY(IGNORE),
+};
+
+__attribute__((unused))
+static const char *state_name(enum keyboard_state state)
+{
+ if (state >= ARRAY_SIZE(state_names) || !state_names[state])
+ return "<unknown>";
+ return state_names[state];
+}
+
static uint64_t keyboard_time;
static uint64_t state_time;
@@ -305,20 +330,23 @@ static void keyboard_poll(void)
case STATE_SELF_TEST:
if (!i8042_data_ready_ps2()) {
- if (timer_us(state_time) > 5*1000*1000)
+ if (timer_us(state_time) > 5*1000*1000) {
+ debug("WARNING: Keyboard self-test timed out.\n");
next_state = STATE_DISABLE_SCAN;
+ }
break;
}
const uint8_t self_test_result = i8042_read_data_ps2();
switch (self_test_result) {
case 0xaa:
- /* Success! */
+ debug("INFO: Keyboard self-test succeeded.\n");
next_state = STATE_CONFIGURE;
break;
case 0xfc:
case 0xfd:
/* Failure. Try again. */
+ debug("WARNING: Keyboard self-test failed.\n");
next_state = STATE_START_SELF_TEST;
break;
default:
@@ -387,6 +415,7 @@ static void keyboard_poll(void)
}
if (keyboard_state != next_state) {
+ debug("INFO: Keyboard advancing state to '%s'.\n", state_name(next_state));
keyboard_state = next_state;
state_time = timer_us(0);
}