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Commit 7363b25a authored by Simon Wood's avatar Simon Wood Committed by Jiri Kosina
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HID: hid-logitech: Rewrite of descriptor for all DF wheels 



Rewrite the HID descriptor for _all_ Driving Force wheels (real
or emulated) so that they can report separate Accelerator and
Brake axis.

If the user wants a combined accel/brake axis, they can use the
'combined pedals' feature.

$ echo 1 > /sys/bus/hid/devices/<device-id>/combine_pedals

Signed-off-by: default avatarSimon Wood <simon@mungewell.org>
Signed-off-by: default avatarJiri Kosina <jkosina@suse.cz>
parent b456634b

drivers/hid/hid-lg.c

+1 −14
Original line number Diff line number Diff line
@@ -343,8 +343,6 @@ static __u8 *lg_report_fixup(struct hid_device *hdev, __u8 *rdesc, 
		unsigned int *rsize)

{

	struct lg_drv_data *drv_data = hid_get_drvdata(hdev);

	struct usb_device_descriptor *udesc;

	__u16 bcdDevice, rev_maj, rev_min;



	if ((drv_data->quirks & LG_RDESC) && *rsize >= 91 && rdesc[83] == 0x26 &&

			rdesc[84] == 0x8c && rdesc[85] == 0x02) {
@@ -365,18 +363,7 @@ static __u8 *lg_report_fixup(struct hid_device *hdev, __u8 *rdesc, 


	/* Several wheels report as this id when operating in emulation mode. */

	case USB_DEVICE_ID_LOGITECH_WHEEL:

		udesc = &(hid_to_usb_dev(hdev)->descriptor);

		if (!udesc) {

			hid_err(hdev, "NULL USB device descriptor\n");

			break;

		}

		bcdDevice = le16_to_cpu(udesc->bcdDevice);

		rev_maj = bcdDevice >> 8;

		rev_min = bcdDevice & 0xff;



		/* Update the report descriptor for only the Driving Force wheel */

		if (rev_maj == 1 && rev_min == 2 &&

				*rsize == DF_RDESC_ORIG_SIZE) {

		if (*rsize == DF_RDESC_ORIG_SIZE) {

			hid_info(hdev,

				"fixing up Logitech Driving Force report descriptor\n");

			rdesc = df_rdesc_fixed;