Added support for a ShanWan PS2 -> PS3 USB converter to the HIDAPI driver

src/joystick/hidapi/SDL_hidapi_ps3.c

@@ -18,9 +18,6 @@
      misrepresented as being the original software.
   3. This notice may not be removed or altered from any source distribution.
 */
-/* This driver supports both simplified reports and the extended input reports enabled by Steam.
-   Code and logic contributed by Valve Corporation under the SDL zlib license.
-*/
 #include "../../SDL_internal.h"
 
 #ifdef SDL_JOYSTICK_HIDAPI
@@ -109,6 +106,9 @@ HIDAPI_DriverPS3_IsSupportedDevice(SDL_HIDAPI_Device *device, const char *name,
     if (vendor_id == USB_VENDOR_SONY && product_id == USB_PRODUCT_SONY_DS3) {
         return SDL_TRUE;
     }
+    if (vendor_id == USB_VENDOR_SHANWAN && product_id == USB_PRODUCT_SHANWAN_DS3) {
+        return SDL_TRUE;
+    }
     return SDL_FALSE;
 }
 
@@ -323,6 +323,83 @@ HIDAPI_DriverPS3_ScaleAccel(Sint16 value)
     return (float)(value - 511) / 113.0f;
 }
 
+static void
+HIDAPI_DriverPS3_HandleMiniStatePacket(SDL_Joystick *joystick, SDL_DriverPS3_Context *ctx, Uint8 *data, int size)
+{
+    Sint16 axis;
+
+    if (ctx->last_state[4] != data[4]) {
+        SDL_bool dpad_up = SDL_FALSE;
+        SDL_bool dpad_down = SDL_FALSE;
+        SDL_bool dpad_left = SDL_FALSE;
+        SDL_bool dpad_right = SDL_FALSE;
+
+        switch (data[4] & 0x0f) {
+        case 0:
+            dpad_up = SDL_TRUE;
+            break;
+        case 1:
+            dpad_up = SDL_TRUE;
+            dpad_right = SDL_TRUE;
+            break;
+        case 2:
+            dpad_right = SDL_TRUE;
+            break;
+        case 3:
+            dpad_right = SDL_TRUE;
+            dpad_down = SDL_TRUE;
+            break;
+        case 4:
+            dpad_down = SDL_TRUE;
+            break;
+        case 5:
+            dpad_left = SDL_TRUE;
+            dpad_down = SDL_TRUE;
+            break;
+        case 6:
+            dpad_left = SDL_TRUE;
+            break;
+        case 7:
+            dpad_up = SDL_TRUE;
+            dpad_left = SDL_TRUE;
+            break;
+        default:
+            break;
+        }
+        SDL_PrivateJoystickButton(joystick, SDL_CONTROLLER_BUTTON_DPAD_DOWN, dpad_down);
+        SDL_PrivateJoystickButton(joystick, SDL_CONTROLLER_BUTTON_DPAD_UP, dpad_up);
+        SDL_PrivateJoystickButton(joystick, SDL_CONTROLLER_BUTTON_DPAD_RIGHT, dpad_right);
+        SDL_PrivateJoystickButton(joystick, SDL_CONTROLLER_BUTTON_DPAD_LEFT, dpad_left);
+
+        SDL_PrivateJoystickButton(joystick, SDL_CONTROLLER_BUTTON_Y, (data[4] & 0x10) ? SDL_PRESSED : SDL_RELEASED);
+        SDL_PrivateJoystickButton(joystick, SDL_CONTROLLER_BUTTON_B, (data[4] & 0x20) ? SDL_PRESSED : SDL_RELEASED);
+        SDL_PrivateJoystickButton(joystick, SDL_CONTROLLER_BUTTON_A, (data[4] & 0x40) ? SDL_PRESSED : SDL_RELEASED);
+        SDL_PrivateJoystickButton(joystick, SDL_CONTROLLER_BUTTON_X, (data[4] & 0x80) ? SDL_PRESSED : SDL_RELEASED);
+    }
+
+    if (ctx->last_state[5] != data[5]) {
+        SDL_PrivateJoystickButton(joystick, SDL_CONTROLLER_BUTTON_LEFTSHOULDER, (data[5] & 0x01) ? SDL_PRESSED : SDL_RELEASED);
+        SDL_PrivateJoystickButton(joystick, SDL_CONTROLLER_BUTTON_RIGHTSHOULDER, (data[5] & 0x02) ? SDL_PRESSED : SDL_RELEASED);
+        SDL_PrivateJoystickAxis(joystick, SDL_CONTROLLER_AXIS_TRIGGERLEFT, (data[5] & 0x04) ? SDL_JOYSTICK_AXIS_MAX : SDL_JOYSTICK_AXIS_MIN);
+        SDL_PrivateJoystickAxis(joystick, SDL_CONTROLLER_AXIS_TRIGGERRIGHT, (data[5] & 0x08) ? SDL_JOYSTICK_AXIS_MAX : SDL_JOYSTICK_AXIS_MIN);
+        SDL_PrivateJoystickButton(joystick, SDL_CONTROLLER_BUTTON_BACK, (data[5] & 0x10) ? SDL_PRESSED : SDL_RELEASED);
+        SDL_PrivateJoystickButton(joystick, SDL_CONTROLLER_BUTTON_START, (data[5] & 0x20) ? SDL_PRESSED : SDL_RELEASED);
+        SDL_PrivateJoystickButton(joystick, SDL_CONTROLLER_BUTTON_LEFTSTICK, (data[5] & 0x40) ? SDL_PRESSED : SDL_RELEASED);
+        SDL_PrivateJoystickButton(joystick, SDL_CONTROLLER_BUTTON_RIGHTSTICK, (data[5] & 0x80) ? SDL_PRESSED : SDL_RELEASED);
+    }
+
+    axis = ((int)data[2] * 257) - 32768;
+    SDL_PrivateJoystickAxis(joystick, SDL_CONTROLLER_AXIS_LEFTX, axis);
+    axis = ((int)data[3] * 257) - 32768;
+    SDL_PrivateJoystickAxis(joystick, SDL_CONTROLLER_AXIS_LEFTY, axis);
+    axis = ((int)data[0] * 257) - 32768;
+    SDL_PrivateJoystickAxis(joystick, SDL_CONTROLLER_AXIS_RIGHTX, axis);
+    axis = ((int)data[1] * 257) - 32768;
+    SDL_PrivateJoystickAxis(joystick, SDL_CONTROLLER_AXIS_RIGHTY, axis);
+
+    SDL_memcpy(ctx->last_state, data, SDL_min(size, sizeof(ctx->last_state)));
+}
+
 static void
 HIDAPI_DriverPS3_HandleStatePacket(SDL_Joystick *joystick, SDL_DriverPS3_Context *ctx, Uint8 *data, int size)
 {
@@ -431,6 +508,12 @@ HIDAPI_DriverPS3_UpdateDevice(SDL_HIDAPI_Device *device)
         HIDAPI_DumpPacket("PS3 packet: size = %d", data, size);
 #endif
 
+        if (size == 7) {
+            /* Seen on a ShanWan PS2 -> PS3 USB converter */
+            HIDAPI_DriverPS3_HandleMiniStatePacket(joystick, ctx, data, size);
+            continue;
+        }
+
         switch (data[0]) {
         case k_EPS3ReportIdState:
             if (data[1] == 0xFF) {

src/joystick/usb_ids.h

@@ -37,6 +37,7 @@
 #define USB_VENDOR_POWERA       0x24c6
 #define USB_VENDOR_POWERA_ALT   0x20d6
 #define USB_VENDOR_RAZER        0x1532
+#define USB_VENDOR_SHANWAN      0x2563
 #define USB_VENDOR_SHENZHEN     0x0079
 #define USB_VENDOR_SONY         0x054c
 #define USB_VENDOR_VALVE        0x28de
@@ -62,6 +63,7 @@
 #define USB_PRODUCT_RAZER_PANTHERA                          0x0401
 #define USB_PRODUCT_RAZER_PANTHERA_EVO                      0x1008
 #define USB_PRODUCT_RAZER_ATROX                             0x0a00
+#define USB_PRODUCT_SHANWAN_DS3                             0x0523
 #define USB_PRODUCT_SONY_DS3                                0x0268
 #define USB_PRODUCT_SONY_DS4                                0x05c4
 #define USB_PRODUCT_SONY_DS4_DONGLE                         0x0ba0