HID: Add support for Holtek gaming mouse 04d9:a04a

This mouse is sold as Tracer Sniper TRM-503, NOVA Gaming Slider X200 and
Zalman ZM-GM1, and reports too high usage maximum and logical maximum
(like 04d9:a067, but its report descriptor is different). This patch
adds its USB ID and fixes the report descriptor in the same way.

Note: I don't actually have such a mouse to test, I took the report
descriptor posted at https://bugzilla.novell.com/show_bug.cgi?id=774676,
compared it to the one from 04d9:a067 and changed the offsets
accordingly (all numbers minus 9, since it is 9 bytes shorter, and the
difference is before the values that need changing). That Surely Works™.

Signed-off-by: Christian Ohm <chr.ohm@gmx.net>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

3 files changed, 25 insertions, 6 deletions

diff --git a/drivers/hid/Kconfig b/drivers/hid/Kconfig
index a0e19dc69daf..79e02682b2df 100644
--- a/drivers/hid/Kconfig
+++ b/drivers/hid/Kconfig
@@ -232,6 +232,8 @@ config HID_HOLTEK
           - Holtek On Line Grip based game controller
           - Trust GXT 18 Gaming Keyboard
           - Sharkoon Drakonia / Perixx MX-2000 gaming mice
+          - Tracer Sniper TRM-503 / NOVA Gaming Slider X200 /
+            Zalman ZM-GM1
 
 config HOLTEK_FF
         bool "Holtek On Line Grip force feedback support"
diff --git a/drivers/hid/hid-holtek-mouse.c b/drivers/hid/hid-holtek-mouse.c
index f32e29aea11a..6a23ee678138 100644
--- a/drivers/hid/hid-holtek-mouse.c
+++ b/drivers/hid/hid-holtek-mouse.c
@@ -23,8 +23,10 @@
  * excessively large number of consumer usages (2^15), which is more than
  * HID_MAX_USAGES. This prevents proper parsing of the report descriptor.
  *
- * This driver fixes the report descriptor for USB ID 04d9:a067, sold as
- * Sharkoon Drakonia and Perixx MX-2000.
+ * This driver fixes the report descriptor for:
+ * - USB ID 04d9:a067, sold as Sharkoon Drakonia and Perixx MX-2000
+ * - USB ID 04d9:a04a, sold as Tracer Sniper TRM-503, NOVA Gaming Slider X200
+ *   and Zalman ZM-GM1
  */
 
 static __u8 *holtek_mouse_report_fixup(struct hid_device *hdev, __u8 *rdesc,
@@ -35,11 +37,23 @@ static __u8 *holtek_mouse_report_fixup(struct hid_device *hdev, __u8 *rdesc,
         if (intf->cur_altsetting->desc.bInterfaceNumber == 1) {
                 /* Change usage maximum and logical maximum from 0x7fff to
                  * 0x2fff, so they don't exceed HID_MAX_USAGES */
-                if (*rsize >= 122 && rdesc[115] == 0xff && rdesc[116] == 0x7f
-                                && rdesc[120] == 0xff && rdesc[121] == 0x7f) {
-                        hid_info(hdev, "Fixing up report descriptor\n");
-                        rdesc[116] = rdesc[121] = 0x2f;
+                switch (hdev->product) {
+                case USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A067:
+                        if (*rsize >= 122 && rdesc[115] == 0xff && rdesc[116] == 0x7f
+                                        && rdesc[120] == 0xff && rdesc[121] == 0x7f) {
+                                hid_info(hdev, "Fixing up report descriptor\n");
+                                rdesc[116] = rdesc[121] = 0x2f;
+                        }
+                        break;
+                case USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A04A:
+                        if (*rsize >= 113 && rdesc[106] == 0xff && rdesc[107] == 0x7f
+                                        && rdesc[111] == 0xff && rdesc[112] == 0x7f) {
+                                hid_info(hdev, "Fixing up report descriptor\n");
+                                rdesc[107] = rdesc[112] = 0x2f;
+                        }
+                        break;
                 }
+
         }
         return rdesc;
 }
@@ -47,6 +61,8 @@ static __u8 *holtek_mouse_report_fixup(struct hid_device *hdev, __u8 *rdesc,
 static const struct hid_device_id holtek_mouse_devices[] = {
         { HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT,
                         USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A067) },
+        { HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT,
+                        USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A04A) },
         { }
 };
 MODULE_DEVICE_TABLE(hid, holtek_mouse_devices);
diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
index 59766dfdf761..a9fcb9ea6c16 100644
--- a/drivers/hid/hid-ids.h
+++ b/drivers/hid/hid-ids.h
@@ -441,6 +441,7 @@
 #define USB_VENDOR_ID_HOLTEK_ALT                0x04d9
 #define USB_DEVICE_ID_HOLTEK_ALT_KEYBOARD       0xa055
 #define USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A067     0xa067
+#define USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A04A     0xa04a
 
 #define USB_VENDOR_ID_IMATION           0x0718
 #define USB_DEVICE_ID_DISC_STAKKA       0xd000