Record SMBIOS Wake-up Type

Wake-up Type identifies the event that caused the system to power on.
Only power switch and Wake-on-LAN are currently implemented.

The list of values is defined in section 7.2.2 System - Wake-up Type.

Ref: SMBIOS Reference Specification 3.6.0
Signed-off-by: Tim Crawford <tcrawford@system76.com>

Author: crawfxrd

src/board/system76/common/include/board/power.h

@@ -13,6 +13,21 @@ enum PowerState {
 extern enum PowerState power_state;
 void update_power_state(void);
 
+// SMBIOS Wake-up Type
+enum PowerWakeupType {
+    POWER_WAKEUP_TYPE_RESERVED = 0,
+    POWER_WAKEUP_TYPE_OTHER = 1,
+    POWER_WAKEUP_TYPE_UNKNOWN = 2,
+    POWER_WAKEUP_TYPE_APM_TIMER = 3,
+    POWER_WAKEUP_TYPE_MODEM_RING = 4,
+    POWER_WAKEUP_TYPE_LAN_REMOTE = 5,
+    POWER_WAKEUP_TYPE_POWER_SWITCH = 6,
+    POWER_WAKEUP_TYPE_PCI_PME = 7,
+    POWER_WAKEUP_TYPE_AC_POWER_RESTORED = 8,
+};
+
+extern enum PowerWakeupType power_wakeup_type;
+
 void power_init(void);
 void power_on(void);
 void power_off(void);

src/board/system76/common/power.c

@@ -124,6 +124,10 @@ extern uint8_t main_cycle;
 
 enum PowerState power_state = POWER_STATE_OFF;
 
+// Event that caused the system to power on.
+// Note: Must not be Reserved (0x00) or Unknown (0x02) when reported.
+enum PowerWakeupType power_wakeup_type = POWER_WAKEUP_TYPE_UNKNOWN;
+
 enum PowerState calculate_power_state(void) {
     if (!gpio_get(&EC_RSMRST_N)) {
         // S5 plane not powered
@@ -437,6 +441,7 @@ void power_event(void) {
                 if (config_should_reset())
                     config_reset();
                 power_on();
+                power_wakeup_type = POWER_WAKEUP_TYPE_POWER_SWITCH;
 
                 // After power on ensure there is no secondary press sent to PCH
                 ps_new = ps_last;
@@ -564,6 +569,7 @@ void power_event(void) {
         DEBUG("%02X: LAN_WAKEUP# asserted\n", main_cycle);
         if (power_state == POWER_STATE_OFF) {
             power_on();
+            power_wakeup_type = POWER_WAKEUP_TYPE_LAN_REMOTE;
         }
     }
 #if LEVEL >= LEVEL_DEBUG