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: Simon Wood <simon@mungewell.org>
Tested-by: John Murphy <rosegardener@freeode.co.uk>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/drivers/hid/hid-steelseries-srws1.c b/drivers/hid/hid-steelseries-srws1.c
index 161917c..e95434d 100644
--- a/drivers/hid/hid-steelseries-srws1.c
+++ b/drivers/hid/hid-steelseries-srws1.c
@@ -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;
}