drivers/hid/hid-holtek-mouse.c

0001 // SPDX-License-Identifier: GPL-2.0-or-later
0002 /*
0003  * HID driver for Holtek gaming mice
0004  * Copyright (c) 2013 Christian Ohm
0005  * Heavily inspired by various other HID drivers that adjust the report
0006  * descriptor.
0007 */
0008
0009 /*
0010  */
0011
0012 #include <linux/hid.h>
0013 #include <linux/module.h>
0014 #include <linux/usb.h>
0015
0016 #include "hid-ids.h"
0017
0018 /*
0019  * The report descriptor of some Holtek based gaming mice specifies an
0020  * excessively large number of consumer usages (2^15), which is more than
0021  * HID_MAX_USAGES. This prevents proper parsing of the report descriptor.
0022  *
0023  * This driver fixes the report descriptor for:
0024  * - USB ID 04d9:a067, sold as Sharkoon Drakonia and Perixx MX-2000
0025  * - USB ID 04d9:a04a, sold as Tracer Sniper TRM-503, NOVA Gaming Slider X200
0026  *   and Zalman ZM-GM1
0027  * - USB ID 04d9:a081, sold as SHARKOON DarkGlider Gaming mouse
0028  * - USB ID 04d9:a072, sold as LEETGION Hellion Gaming Mouse
0029  * - USB ID 04d9:a0c2, sold as ETEKCITY Scroll T-140 Gaming Mouse
0030  */
0031
0032 static __u8 *holtek_mouse_report_fixup(struct hid_device *hdev, __u8 *rdesc,
0033         unsigned int *rsize)
0034 {
0035     struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
0036
0037     if (intf->cur_altsetting->desc.bInterfaceNumber == 1) {
0038         /* Change usage maximum and logical maximum from 0x7fff to
0039          * 0x2fff, so they don't exceed HID_MAX_USAGES */
0040         switch (hdev->product) {
0041         case USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A067:
0042         case USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A072:
0043         case USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A0C2:
0044             if (*rsize >= 122 && rdesc[115] == 0xff && rdesc[116] == 0x7f
0045                     && rdesc[120] == 0xff && rdesc[121] == 0x7f) {
0046                 hid_info(hdev, "Fixing up report descriptor\n");
0047                 rdesc[116] = rdesc[121] = 0x2f;
0048             }
0049             break;
0050         case USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A04A:
0051         case USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A070:
0052         case USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A081:
0053             if (*rsize >= 113 && rdesc[106] == 0xff && rdesc[107] == 0x7f
0054                     && rdesc[111] == 0xff && rdesc[112] == 0x7f) {
0055                 hid_info(hdev, "Fixing up report descriptor\n");
0056                 rdesc[107] = rdesc[112] = 0x2f;
0057             }
0058             break;
0059         }
0060
0061     }
0062     return rdesc;
0063 }
0064
0065 static int holtek_mouse_probe(struct hid_device *hdev,
0066                   const struct hid_device_id *id)
0067 {
0068     int ret;
0069
0070     if (!hid_is_usb(hdev))
0071         return -EINVAL;
0072
0073     ret = hid_parse(hdev);
0074     if (ret) {
0075         hid_err(hdev, "hid parse failed: %d\n", ret);
0076         return ret;
0077     }
0078
0079     ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
0080     if (ret) {
0081         hid_err(hdev, "hw start failed: %d\n", ret);
0082         return ret;
0083     }
0084
0085     return 0;
0086 }
0087
0088 static const struct hid_device_id holtek_mouse_devices[] = {
0089     { HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT,
0090             USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A067) },
0091         { HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT,
0092             USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A070) },
0093     { HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT,
0094             USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A04A) },
0095     { HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT,
0096             USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A072) },
0097     { HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT,
0098             USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A081) },
0099     { HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT,
0100             USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A0C2) },
0101     { }
0102 };
0103 MODULE_DEVICE_TABLE(hid, holtek_mouse_devices);
0104
0105 static struct hid_driver holtek_mouse_driver = {
0106     .name = "holtek_mouse",
0107     .id_table = holtek_mouse_devices,
0108     .report_fixup = holtek_mouse_report_fixup,
0109     .probe = holtek_mouse_probe,
0110 };
0111
0112 module_hid_driver(holtek_mouse_driver);
0113 MODULE_LICENSE("GPL");