diff options
| -rw-r--r-- | src/mainboard/google/storm/chromeos.c | 29 |
1 files changed, 28 insertions, 1 deletions
diff --git a/src/mainboard/google/storm/chromeos.c b/src/mainboard/google/storm/chromeos.c index 5913c3fe13..be949a515e 100644 --- a/src/mainboard/google/storm/chromeos.c +++ b/src/mainboard/google/storm/chromeos.c @@ -22,6 +22,7 @@ #include <delay.h> #include <gpio.h> #include <string.h> +#include <timer.h> #include <vendorcode/google/chromeos/chromeos.h> #define DEV_SW 15 @@ -60,9 +61,35 @@ int get_developer_mode_switch(void) return read_gpio(DEV_SW) ^ !DEV_POL; } +/* + * Holding recovery button pressed continuously for 5 seconds at reset time + * is required to trigger recovery mode. + */ +#define RECOVERY_MODE_DELAY_MS (5 * 1000) int get_recovery_mode_switch(void) { - return read_gpio(REC_SW) ^ !REC_POL; + struct stopwatch sw; + static int sampled_value = -1; + + if (sampled_value == -1) + sampled_value = read_gpio(REC_SW) ^ !REC_POL; + + if (!sampled_value) + return 0; + + printk(BIOS_INFO, "recovery button pressed\n"); + stopwatch_init_msecs_expire(&sw, RECOVERY_MODE_DELAY_MS); + + do { + sampled_value = read_gpio(REC_SW) ^ !REC_POL; + if (!sampled_value) + break; + } while (!stopwatch_expired(&sw)); + + if (sampled_value) + printk(BIOS_INFO, "recovery mode requested\n"); + + return sampled_value; } int get_write_protect_state(void) |