src/ec/google/chromeec/switches.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <bootmode.h>
   4 #include <ec/google/chromeec/ec.h>
   5 #include <elog.h>
   6
   7 #if CONFIG(EC_GOOGLE_CHROMEEC_LPC)
   8 int get_lid_switch(void)
   9 {
  10         if (!CONFIG(VBOOT_LID_SWITCH))
  11                 return -1;
  12
  13         return !!(google_chromeec_get_switches() & EC_SWITCH_LID_OPEN);
  14 }
  15 #endif
  16
  17 int get_recovery_mode_switch(void)
  18 {
  19         /* Check for dedicated recovery switch first. */
  20         if (CONFIG(EC_GOOGLE_CHROMEEC_LPC) &&
  21             (google_chromeec_get_switches() & EC_SWITCH_DEDICATED_RECOVERY))
  22                 return 1;
  23
  24         /* Check if the EC has posted the keyboard recovery event. */
  25         return !!(google_chromeec_get_events_b() &
  26                   EC_HOST_EVENT_MASK(EC_HOST_EVENT_KEYBOARD_RECOVERY));
  27 }
  28
  29 int get_recovery_mode_retrain_switch(void)
  30 {
  31         /*
  32          * Check if the EC has posted the keyboard recovery event with memory
  33          * retrain.
  34          */
  35         return !!(google_chromeec_get_events_b() &
  36                   EC_HOST_EVENT_MASK(EC_HOST_EVENT_KEYBOARD_RECOVERY_HW_REINIT));
  37 }
  38
  39 static void elog_add_recovery_mode_switch_event(void)
  40 {
  41         uint64_t events = google_chromeec_get_events_b();
  42         uint8_t event_byte = EC_HOST_EVENT_KEYBOARD_RECOVERY;
  43
  44         if (!(events & EC_HOST_EVENT_MASK(EC_HOST_EVENT_KEYBOARD_RECOVERY)))
  45                 return;
  46
  47         if (events & EC_HOST_EVENT_MASK(EC_HOST_EVENT_KEYBOARD_RECOVERY_HW_REINIT))
  48                 event_byte = EC_HOST_EVENT_KEYBOARD_RECOVERY_HW_REINIT;
  49
  50         elog_add_event_byte(ELOG_TYPE_EC_EVENT, event_byte);
  51 }
  52
  53 int clear_recovery_mode_switch(void)
  54 {
  55         /* Log elog event before clearing */
  56         elog_add_recovery_mode_switch_event();
  57
  58         /* Clear all host event bits requesting recovery mode. */
  59         return google_chromeec_clear_events_b(
  60                 EC_HOST_EVENT_MASK(EC_HOST_EVENT_KEYBOARD_RECOVERY) |
  61                 EC_HOST_EVENT_MASK(EC_HOST_EVENT_KEYBOARD_RECOVERY_HW_REINIT));
  62 }