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Commit 5492606d authored by Simon Wood's avatar Simon Wood Committed by Jiri Kosina
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USB: HID: Steelseries SRW-S1 Add support for dials 



This patch to the SRW-S1 driver re-writes the HID descriptor
to insert a section for the 3 dials on the device, previously
these were contained within a 'Manufacturer Specific' usage
page.

Signed-off-by: default avatarSimon Wood <simon@mungewell.org>
Tested-by: default avatarJohn Murphy <rosegardener@freeode.co.uk>
Signed-off-by: default avatarJiri Kosina <jkosina@suse.cz>
parent 75dbb953

drivers/hid/hid-steelseries-srws1.c

+82 −4
Original line number Diff line number Diff line
@@ -17,16 +17,94 @@ 


#include "hid-ids.h"



/* Fixed report descriptor for Steelseries SRW-S1 wheel controller

 *

 * The original descriptor hides the sensitivity and assists dials

 * a custom vendor usage page. This inserts a patch to make them

 * appear in the 'Generic Desktop' usage.

 */



static __u8 steelseries_srws1_rdesc_fixed[] = {

0x05, 0x01,         /*  Usage Page (Desktop)                */

0x09, 0x08,         /*  Usage (MultiAxis), Changed          */

0xA1, 0x01,         /*  Collection (Application),           */

0xA1, 0x02,         /*      Collection (Logical),           */

0x95, 0x01,         /*          Report Count (1),           */

0x05, 0x01,         /* Changed  Usage Page (Desktop),       */

0x09, 0x30,         /* Changed  Usage (X),                  */

0x16, 0xF8, 0xF8,   /*          Logical Minimum (-1800),    */

0x26, 0x08, 0x07,   /*          Logical Maximum (1800),     */

0x65, 0x14,         /*          Unit (Degrees),             */

0x55, 0x0F,         /*          Unit Exponent (15),         */

0x75, 0x10,         /*          Report Size (16),           */

0x81, 0x02,         /*          Input (Variable),           */

0x09, 0x31,         /* Changed  Usage (Y),                  */

0x15, 0x00,         /*          Logical Minimum (0),        */

0x26, 0xFF, 0x03,   /*          Logical Maximum (1023),     */

0x75, 0x0C,         /*          Report Size (12),           */

0x81, 0x02,         /*          Input (Variable),           */

0x09, 0x32,         /* Changed  Usage (Z),                  */

0x15, 0x00,         /*          Logical Minimum (0),        */

0x26, 0xFF, 0x03,   /*          Logical Maximum (1023),     */

0x75, 0x0C,         /*          Report Size (12),           */

0x81, 0x02,         /*          Input (Variable),           */

0x05, 0x01,         /*          Usage Page (Desktop),       */

0x09, 0x39,         /*          Usage (Hat Switch),         */

0x25, 0x07,         /*          Logical Maximum (7),        */

0x35, 0x00,         /*          Physical Minimum (0),       */

0x46, 0x3B, 0x01,   /*          Physical Maximum (315),     */

0x65, 0x14,         /*          Unit (Degrees),             */

0x75, 0x04,         /*          Report Size (4),            */

0x95, 0x01,         /*          Report Count (1),           */

0x81, 0x02,         /*          Input (Variable),           */

0x25, 0x01,         /*          Logical Maximum (1),        */

0x45, 0x01,         /*          Physical Maximum (1),       */

0x65, 0x00,         /*          Unit,                       */

0x75, 0x01,         /*          Report Size (1),            */

0x95, 0x03,         /*          Report Count (3),           */

0x81, 0x01,         /*          Input (Constant),           */

0x05, 0x09,         /*          Usage Page (Button),        */

0x19, 0x01,         /*          Usage Minimum (01h),        */

0x29, 0x11,         /*          Usage Maximum (11h),        */

0x95, 0x11,         /*          Report Count (17),          */

0x81, 0x02,         /*          Input (Variable),           */

                    /*   ---- Dial patch starts here ----   */

0x05, 0x01,         /*          Usage Page (Desktop),       */

0x09, 0x33,         /*          Usage (RX),                 */

0x75, 0x04,         /*          Report Size (4),            */

0x95, 0x02,         /*          Report Count (2),           */

0x15, 0x00,         /*          Logical Minimum (0),        */

0x25, 0x0b,         /*          Logical Maximum (b),        */

0x81, 0x02,         /*          Input (Variable),           */

0x09, 0x35,         /*          Usage (RZ),                 */

0x75, 0x04,         /*          Report Size (4),            */

0x95, 0x01,         /*          Report Count (1),           */

0x25, 0x03,         /*          Logical Maximum (3),        */

0x81, 0x02,         /*          Input (Variable),           */

                    /*    ---- Dial patch ends here ----    */

0x06, 0x00, 0xFF,   /*          Usage Page (FF00h),         */

0x09, 0x01,         /*          Usage (01h),                */

0x75, 0x04,         /* Changed  Report Size (4),            */

0x95, 0x0D,         /* Changed  Report Count (13),          */

0x81, 0x02,         /*          Input (Variable),           */

0xC0,               /*      End Collection,                 */

0xA1, 0x02,         /*      Collection (Logical),           */

0x09, 0x02,         /*          Usage (02h),                */

0x75, 0x08,         /*          Report Size (8),            */

0x95, 0x10,         /*          Report Count (16),          */

0x91, 0x02,         /*          Output (Variable),          */

0xC0,               /*      End Collection,                 */

0xC0                /*  End Collection                      */

};



static __u8 *steelseries_srws1_report_fixup(struct hid_device *hdev, __u8 *rdesc,

		unsigned int *rsize)

{

	if (*rsize >= 115 && rdesc[11] == 0x02 && rdesc[13] == 0xc8

			&& rdesc[29] == 0xbb && rdesc[40] == 0xc5) {

		hid_info(hdev, "Fixing up Steelseries SRW-S1 report descriptor\n");

		rdesc[11] = 0x01;

		rdesc[13] = 0x30;

		rdesc[29] = 0x31;

		rdesc[40] = 0x32;

		rdesc = steelseries_srws1_rdesc_fixed;

		*rsize = sizeof(steelseries_srws1_rdesc_fixed);

	}

	return rdesc;

}