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hidapi: Add support for NSO GameCube controller via libusb.

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Thanks to Nohzockt for the initial libusb init and hidapi polling work!
This commit is contained in:
Ethan Lee
2025-07-05 14:52:06 -04:00
committed by Sam Lantinga
parent efea62ed61
commit a798da2ec7
6 changed files with 225 additions and 4 deletions
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127
src/joystick/hidapi/SDL_hidapi_switch2.c
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@@ -51,6 +51,9 @@ static bool HIDAPI_DriverSwitch2_IsEnabled(void)
static bool HIDAPI_DriverSwitch2_IsSupportedDevice(SDL_HIDAPI_Device *device, const char *name, SDL_GamepadType type, Uint16 vendor_id, Uint16 product_id, Uint16 version, int interface_number, int interface_class, int interface_subclass, int interface_protocol)
{
if (vendor_id == USB_VENDOR_NINTENDO) {
if (product_id == USB_PRODUCT_NINTENDO_SWITCH2_PRO) {
return true;
}
if (product_id == USB_PRODUCT_NINTENDO_SWITCH2_GAMECUBE_CONTROLLER) {
return true;
}
@@ -61,7 +64,7 @@ static bool HIDAPI_DriverSwitch2_IsSupportedDevice(SDL_HIDAPI_Device *device, co
static bool HIDAPI_DriverSwitch2_InitDevice(SDL_HIDAPI_Device *device)
{
return SDL_Unsupported();
return HIDAPI_JoystickConnected(device, NULL);
}
static int HIDAPI_DriverSwitch2_GetDevicePlayerIndex(SDL_HIDAPI_Device *device, SDL_JoystickID instance_id)
@@ -75,12 +78,130 @@ static void HIDAPI_DriverSwitch2_SetDevicePlayerIndex(SDL_HIDAPI_Device *device,
static bool HIDAPI_DriverSwitch2_UpdateDevice(SDL_HIDAPI_Device *device)
{
return SDL_Unsupported();
const struct {
int byte;
unsigned char mask;
} buttons[] = {
{3, 0x01}, // B
{3, 0x02}, // A
{3, 0x04}, // Y
{3, 0x08}, // X
{3, 0x10}, // R (GameCube R Click)
{3, 0x20}, // ZR (GameCube Z)
{3, 0x40}, // PLUS (GameCube Start)
{3, 0x80}, // RS (not on GameCube)
{4, 0x01}, // DPAD_DOWN
{4, 0x02}, // DPAD_RIGHT
{4, 0x04}, // DPAD_LEFT
{4, 0x08}, // DPAD_UP
{4, 0x10}, // L (GameCube L Click)
{4, 0x20}, // ZL
{4, 0x40}, // MINUS (not on GameCube)
{4, 0x80}, // LS (not on GameCube)
{5, 0x01}, // Home
{5, 0x02}, // Capture
{5, 0x04}, // GR (not on GameCube)
{5, 0x08}, // GL (not on GameCube)
{5, 0x10}, // C
};
SDL_Joystick *joystick = NULL;
if (device->num_joysticks > 0) {
joystick = SDL_GetJoystickFromID(device->joysticks[0]);
}
if (joystick == NULL) {
return true;
}
// Read input packet
Uint8 packet[USB_PACKET_LENGTH];
int size;
while ((size = SDL_hid_read_timeout(device->dev, packet, sizeof(packet), 0)) > 0) {
if (size < 15) {
continue;
}
Uint64 timestamp = SDL_GetTicksNS();
for (size_t i = 0; i < SDL_arraysize(buttons); ++i) {
SDL_SendJoystickButton(
timestamp,
joystick,
(Uint8) i,
(packet[buttons[i].byte] & buttons[i].mask) != 0
);
}
SDL_SendJoystickAxis(
timestamp,
joystick,
SDL_GAMEPAD_AXIS_LEFTX,
(Sint16) HIDAPI_RemapVal(
(float) (packet[6] | ((packet[7] & 0x0F) << 8)),
0,
4096,
SDL_MIN_SINT16,
SDL_MAX_SINT16
)
);
SDL_SendJoystickAxis(
timestamp,
joystick,
SDL_GAMEPAD_AXIS_LEFTY,
(Sint16) HIDAPI_RemapVal(
(float) ((packet[7] >> 4) | (packet[8] << 4)),
0,
4096,
SDL_MIN_SINT16,
SDL_MAX_SINT16
)
);
SDL_SendJoystickAxis(
timestamp,
joystick,
SDL_GAMEPAD_AXIS_RIGHTX,
(Sint16) HIDAPI_RemapVal(
(float) (packet[9] | ((packet[10] & 0x0F) << 8)),
0,
4096,
SDL_MIN_SINT16,
SDL_MAX_SINT16
)
);
SDL_SendJoystickAxis(
timestamp,
joystick,
SDL_GAMEPAD_AXIS_RIGHTY,
(Sint16) HIDAPI_RemapVal(
(float) ((packet[10] >> 4) | (packet[11] << 4)),
0,
4096,
SDL_MIN_SINT16,
SDL_MAX_SINT16
)
);
SDL_SendJoystickAxis(
timestamp,
joystick,
SDL_GAMEPAD_AXIS_LEFT_TRIGGER,
(Sint16) HIDAPI_RemapVal(packet[13], 0, 255, SDL_MIN_SINT16, SDL_MAX_SINT16)
);
SDL_SendJoystickAxis(
timestamp,
joystick,
SDL_GAMEPAD_AXIS_RIGHT_TRIGGER,
(Sint16) HIDAPI_RemapVal(packet[14], 0, 255, SDL_MIN_SINT16, SDL_MAX_SINT16)
);
}
return true;
}
static bool HIDAPI_DriverSwitch2_OpenJoystick(SDL_HIDAPI_Device *device, SDL_Joystick *joystick)
{
return SDL_Unsupported();
// Initialize the joystick capabilities
joystick->nbuttons = 21;
joystick->naxes = SDL_GAMEPAD_AXIS_COUNT;
return true;
}
static bool HIDAPI_DriverSwitch2_RumbleJoystick(SDL_HIDAPI_Device *device, SDL_Joystick *joystick, Uint16 low_frequency_rumble, Uint16 high_frequency_rumble)