[RFC 1/5] INPUT: xpad: Add minimal support for Logitech G920 Wheel

Simon Wood
2015-10-23T17:55:14Z

When plugged in the Logitech G920 wheel starts with USBID 046d:c261
and behaviors as a vendor specific class. If a 'magic' byte sequence
is sent the wheel will detach and reconnect as a HID device with the
USBID 046d:c262.
---
drivers/input/joystick/xpad.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)

diff --git a/drivers/input/joystick/xpad.c b/drivers/input/joystick/xpad.c
index f8850f9..af83f7e 100644
--- a/drivers/input/joystick/xpad.c
+++ b/drivers/input/joystick/xpad.c
@@ -93,6 +93,7 @@
#define MAP_STICKS_TO_NULL (1 << 2)
#define DANCEPAD_MAP_CONFIG (MAP_DPAD_TO_BUTTONS | \
MAP_TRIGGERS_TO_BUTTONS | MAP_STICKS_TO_NULL)
+#define SWITCH_G920_TO_HID_MODE (1 << 3)

#define XTYPE_XBOX 0
#define XTYPE_XBOX360 1
@@ -133,6 +134,7 @@ static const struct xpad_device {
{ 0x046d, 0xc21e, "Logitech Gamepad F510", 0, XTYPE_XBOX360 },
{ 0x046d, 0xc21f, "Logitech Gamepad F710", 0, XTYPE_XBOX360 },
{ 0x046d, 0xc242, "Logitech Chillstream Controller", 0, XTYPE_XBOX360 },
+ { 0x046d, 0xc261, "Logitech G920 Driving Force Racing Wheel", SWITCH_G920_TO_HID_MODE, XTYPE_XBOXONE },
{ 0x046d, 0xca84, "Logitech Xbox Cordless Controller", 0, XTYPE_XBOX },
{ 0x046d, 0xca88, "Logitech Compact Controller for Xbox", 0, XTYPE_XBOX },
{ 0x05fd, 0x1007, "Mad Catz Controller (unverified)", 0, XTYPE_XBOX },
@@ -299,6 +301,7 @@ static struct usb_device_id xpad_table[] = {
XPAD_XBOX360_VENDOR(0x045e), /* Microsoft X-Box 360 controllers */
XPAD_XBOXONE_VENDOR(0x045e), /* Microsoft X-Box One controllers */
XPAD_XBOX360_VENDOR(0x046d), /* Logitech X-Box 360 style controllers */
+ XPAD_XBOXONE_VENDOR(0x046d), /* Logitech X-Box One style controllers */
XPAD_XBOX360_VENDOR(0x0738), /* Mad Catz X-Box 360 controllers */
{ USB_DEVICE(0x0738, 0x4540) }, /* Mad Catz Beat Pad */
XPAD_XBOX360_VENDOR(0x0e6f), /* 0x0e6f X-Box 360 controllers */
@@ -1021,6 +1024,19 @@ static int xpad_open(struct input_dev *dev)
if (usb_submit_urb(xpad->irq_in, GFP_KERNEL))
return -EIO;

+ /* Logitect G920 wheel starts in XBOX mode, but is reconfigured to be HID */
+ /* device with USBID of 046D:C262. Wheel will detach when 'magic' is sent. */
+ if (xpad->mapping & SWITCH_G920_TO_HID_MODE) {
+ xpad->odata[0] = 0x0F;
+ xpad->odata[1] = 0x00;
+ xpad->odata[2] = 0x01;
+ xpad->odata[3] = 0x01;
+ xpad->odata[4] = 0x42;
+ xpad->irq_out->transfer_buffer_length = 5;
+
+ return usb_submit_urb(xpad->irq_out, GFP_KERNEL);
+ }
+
if (xpad->xtype == XTYPE_XBOXONE) {
/* Xbox one controller needs to be initialized. */
xpad->odata[0] = 0x05;
--
2.1.4