Fixed Steam Controller battery state

src/joystick/hidapi/SDL_hidapi_steam_triton.c

@@ -228,14 +228,20 @@ static void HIDAPI_DriverSteamTriton_HandleBatteryStatus(SDL_HIDAPI_Device *devi
 {
     SDL_PowerState state;
 
-    if (device->is_bluetooth) {
+    switch (pTritonBatteryStatus->ucChargeState) {
+    case k_EChargeStateDischarging:
         state = SDL_POWERSTATE_ON_BATTERY;
-    } else if (IsProteusDongle(device->product_id)) {
-        state = SDL_POWERSTATE_ON_BATTERY;
-    } else if (pTritonBatteryStatus->ucBatteryLevel == 100) {
-        state = SDL_POWERSTATE_CHARGED;
-    } else {
+        break;
+    case k_EChargeStateCharging:
         state = SDL_POWERSTATE_CHARGING;
+        break;
+    case k_EChargeStateChargingDone:
+        state = SDL_POWERSTATE_CHARGED;
+        break;
+    default:
+        // Error state?
+        state = SDL_POWERSTATE_UNKNOWN;
+        break;
     }
     SDL_SendJoystickPowerInfo(joystick, state, pTritonBatteryStatus->ucBatteryLevel);
 }

src/joystick/hidapi/steam/controller_structs.h

@@ -603,15 +603,25 @@ typedef struct
     TritonMTUIMU_t imu;
 } TritonMTUFull_t;
 
+enum EChargeState
+{
+    k_EChargeStateReset,
+    k_EChargeStateDischarging,
+    k_EChargeStateCharging,
+    k_EChargeStateSrcValidate,
+    k_EChargeStateChargingDone,
+};
+
 typedef struct
 {
+    unsigned char ucChargeState; // EChargeState
     unsigned char ucBatteryLevel;
     unsigned short sBatteryVoltage;
     unsigned short sSystemVoltage;
     unsigned short sInputVoltage;
     unsigned short sCurrent;
     unsigned short sInputCurrent;
-    char cTemperature;
+    unsigned short sTemperature;
 } TritonBatteryStatus_t;
 
 typedef struct