Added a function to get the controller firmware version

src/dynapi/SDL2.exports

@@ -841,3 +841,5 @@
 ++'_SDL_JoystickPathForIndex'.'SDL2.dll'.'SDL_JoystickPathForIndex'
 ++'_SDL_JoystickPath'.'SDL2.dll'.'SDL_JoystickPath'
 ++'_SDL_JoystickAttachVirtualEx'.'SDL2.dll'.'SDL_JoystickAttachVirtualEx'
+++'_SDL_GameControllerGetFirmwareVersion'.'SDL2.dll'.'SDL_GameControllerGetFirmwareVersion'
+++'_SDL_JoystickGetFirmwareVersion'.'SDL2.dll'.'SDL_JoystickGetFirmwareVersion'

src/dynapi/SDL_dynapi_overrides.h

@@ -867,3 +867,5 @@
 #define SDL_JoystickPathForIndex SDL_JoystickPathForIndex_REAL
 #define SDL_JoystickPath SDL_JoystickPath_REAL
 #define SDL_JoystickAttachVirtualEx SDL_JoystickAttachVirtualEx_REAL
+#define SDL_GameControllerGetFirmwareVersion SDL_GameControllerGetFirmwareVersion_REAL
+#define SDL_JoystickGetFirmwareVersion SDL_JoystickGetFirmwareVersion_REAL

src/dynapi/SDL_dynapi_procs.h

@@ -942,3 +942,5 @@ SDL_DYNAPI_PROC(const char*,SDL_GameControllerPath,(SDL_GameController *a),(a),r
 SDL_DYNAPI_PROC(const char*,SDL_JoystickPathForIndex,(int a),(a),return)
 SDL_DYNAPI_PROC(const char*,SDL_JoystickPath,(SDL_Joystick *a),(a),return)
 SDL_DYNAPI_PROC(int,SDL_JoystickAttachVirtualEx,(const SDL_VirtualJoystickDesc *a),(a),return)
+SDL_DYNAPI_PROC(Uint16,SDL_GameControllerGetFirmwareVersion,(SDL_GameController *a),(a),return)
+SDL_DYNAPI_PROC(Uint16,SDL_JoystickGetFirmwareVersion,(SDL_Joystick *a),(a),return)

src/joystick/SDL_gamecontroller.c

@@ -2360,6 +2360,12 @@ SDL_GameControllerGetProductVersion(SDL_GameController *gamecontroller)
     return SDL_JoystickGetProductVersion(SDL_GameControllerGetJoystick(gamecontroller));
 }
 
+Uint16
+SDL_GameControllerGetFirmwareVersion(SDL_GameController *gamecontroller)
+{
+    return SDL_JoystickGetFirmwareVersion(SDL_GameControllerGetJoystick(gamecontroller));
+}
+
 const char *
 SDL_GameControllerGetSerial(SDL_GameController *gamecontroller)
 {

src/joystick/SDL_joystick.c

@@ -2702,6 +2702,14 @@ Uint16 SDL_JoystickGetProductVersion(SDL_Joystick *joystick)
     return version;
 }
 
+Uint16 SDL_JoystickGetFirmwareVersion(SDL_Joystick *joystick)
+{
+    if (!SDL_PrivateJoystickValid(joystick)) {
+        return 0;
+    }
+    return joystick->firmware_version;
+}
+
 const char *SDL_JoystickGetSerial(SDL_Joystick *joystick)
 {
     if (!SDL_PrivateJoystickValid(joystick)) {

src/joystick/SDL_sysjoystick.h

@@ -68,6 +68,7 @@ struct _SDL_Joystick
     char *path;                 /* Joystick path - system dependent */
     char *serial;               /* Joystick serial */
     SDL_JoystickGUID guid;      /* Joystick guid */
+    Uint16 firmware_version;    /* Firmware version, if available */
 
     int naxes;                  /* Number of axis controls on the joystick */
     SDL_JoystickAxisInfo *axes;