HID: Add Holtek USB ID 04d9:a0c2 ETEKCITY Scroll

The report descriptor for the HOLTEK USB ID 04d9:a0c2 (ETEKCITY Scroll
T-140 Gaming Mouse) is set to a very large amount of consumer usages
(2^16), exceeding HID_MAX_USAGES. Added id, bindings and comments for
the mouse, added to hid_have_special_driver, and reduced the usage and
logical maximums to 0x2fff, consistent with the other mice in the
category. Tested on the hardware.

Signed-off-by: John C. DeSilva <desilvjo@umich.edu>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

3 files changed, 6 insertions, 0 deletions

diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
index c527f5ec4cfc..eb50818de41f 100644
--- a/drivers/hid/hid-core.c
+++ b/drivers/hid/hid-core.c
@@ -1793,6 +1793,7 @@ static const struct hid_device_id hid_have_special_driver[] = {
         { HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT, USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A070) },
         { HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT, USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A072) },
         { HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT, USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A081) },
+        { HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT, USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A0C2) },
         { HID_USB_DEVICE(USB_VENDOR_ID_HUION, USB_DEVICE_ID_HUION_TABLET) },
         { HID_USB_DEVICE(USB_VENDOR_ID_JESS2, USB_DEVICE_ID_JESS2_COLOR_RUMBLE_PAD) },
         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ION, USB_DEVICE_ID_ICADE) },
diff --git a/drivers/hid/hid-holtek-mouse.c b/drivers/hid/hid-holtek-mouse.c
index d60fbd0adc0c..78b3a0c76775 100644
--- a/drivers/hid/hid-holtek-mouse.c
+++ b/drivers/hid/hid-holtek-mouse.c
@@ -29,6 +29,7 @@
  *   and Zalman ZM-GM1
  * - USB ID 04d9:a081, sold as SHARKOON DarkGlider Gaming mouse
  * - USB ID 04d9:a072, sold as LEETGION Hellion Gaming Mouse
+ * - USB ID 04d9:a0c2, sold as ETEKCITY Scroll T-140 Gaming Mouse
  */
 
 static __u8 *holtek_mouse_report_fixup(struct hid_device *hdev, __u8 *rdesc,
@@ -42,6 +43,7 @@ static __u8 *holtek_mouse_report_fixup(struct hid_device *hdev, __u8 *rdesc,
                 switch (hdev->product) {
                 case USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A067:
                 case USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A072:
+                case USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A0C2:
                         if (*rsize >= 122 && rdesc[115] == 0xff && rdesc[116] == 0x7f
                                         && rdesc[120] == 0xff && rdesc[121] == 0x7f) {
                                 hid_info(hdev, "Fixing up report descriptor\n");
@@ -74,6 +76,8 @@ static const struct hid_device_id holtek_mouse_devices[] = {
                         USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A072) },
         { HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT,
                         USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A081) },
+        { HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT,
+                        USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A0C2) },
         { }
 };
 MODULE_DEVICE_TABLE(hid, holtek_mouse_devices);
diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
index 3943ffe1a333..29e9b4872ebd 100644
--- a/drivers/hid/hid-ids.h
+++ b/drivers/hid/hid-ids.h
@@ -479,6 +479,7 @@
 #define USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A070     0xa070
 #define USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A072     0xa072
 #define USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A081     0xa081
+#define USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A0C2     0xa0c2
 #define USB_DEVICE_ID_HOLTEK_ALT_KEYBOARD_A096  0xa096
 
 #define USB_VENDOR_ID_IMATION           0x0718