1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * HID driver for Holtek gaming mice 4 * Copyright (c) 2013 Christian Ohm 5 * Heavily inspired by various other HID drivers that adjust the report 6 * descriptor. 7 */ 8 9 /* 10 */ 11 12 #include <linux/hid.h> 13 #include <linux/module.h> 14 #include <linux/usb.h> 15 16 #include "hid-ids.h" 17 18 /* 19 * The report descriptor of some Holtek based gaming mice specifies an 20 * excessively large number of consumer usages (2^15), which is more than 21 * HID_MAX_USAGES. This prevents proper parsing of the report descriptor. 22 * 23 * This driver fixes the report descriptor for: 24 * - USB ID 04d9:a067, sold as Sharkoon Drakonia and Perixx MX-2000 25 * - USB ID 04d9:a04a, sold as Tracer Sniper TRM-503, NOVA Gaming Slider X200 26 * and Zalman ZM-GM1 27 * - USB ID 04d9:a081, sold as SHARKOON DarkGlider Gaming mouse 28 * - USB ID 04d9:a072, sold as LEETGION Hellion Gaming Mouse 29 * - USB ID 04d9:a0c2, sold as ETEKCITY Scroll T-140 Gaming Mouse 30 */ 31 32 static __u8 *holtek_mouse_report_fixup(struct hid_device *hdev, __u8 *rdesc, 33 unsigned int *rsize) 34 { 35 struct usb_interface *intf = to_usb_interface(hdev->dev.parent); 36 37 if (intf->cur_altsetting->desc.bInterfaceNumber == 1) { 38 /* Change usage maximum and logical maximum from 0x7fff to 39 * 0x2fff, so they don't exceed HID_MAX_USAGES */ 40 switch (hdev->product) { 41 case USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A067: 42 case USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A072: 43 case USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A0C2: 44 if (*rsize >= 122 && rdesc[115] == 0xff && rdesc[116] == 0x7f 45 && rdesc[120] == 0xff && rdesc[121] == 0x7f) { 46 hid_info(hdev, "Fixing up report descriptor\n"); 47 rdesc[116] = rdesc[121] = 0x2f; 48 } 49 break; 50 case USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A04A: 51 case USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A070: 52 case USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A081: 53 if (*rsize >= 113 && rdesc[106] == 0xff && rdesc[107] == 0x7f 54 && rdesc[111] == 0xff && rdesc[112] == 0x7f) { 55 hid_info(hdev, "Fixing up report descriptor\n"); 56 rdesc[107] = rdesc[112] = 0x2f; 57 } 58 break; 59 } 60 61 } 62 return rdesc; 63 } 64 65 static int holtek_mouse_probe(struct hid_device *hdev, 66 const struct hid_device_id *id) 67 { 68 int ret; 69 70 if (!hid_is_usb(hdev)) 71 return -EINVAL; 72 73 ret = hid_parse(hdev); 74 if (ret) { 75 hid_err(hdev, "hid parse failed: %d\n", ret); 76 return ret; 77 } 78 79 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT); 80 if (ret) { 81 hid_err(hdev, "hw start failed: %d\n", ret); 82 return ret; 83 } 84 85 return 0; 86 } 87 88 static const struct hid_device_id holtek_mouse_devices[] = { 89 { HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT, 90 USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A067) }, 91 { HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT, 92 USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A070) }, 93 { HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT, 94 USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A04A) }, 95 { HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT, 96 USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A072) }, 97 { HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT, 98 USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A081) }, 99 { HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT, 100 USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A0C2) }, 101 { } 102 }; 103 MODULE_DEVICE_TABLE(hid, holtek_mouse_devices); 104 105 static struct hid_driver holtek_mouse_driver = { 106 .name = "holtek_mouse", 107 .id_table = holtek_mouse_devices, 108 .report_fixup = holtek_mouse_report_fixup, 109 .probe = holtek_mouse_probe, 110 }; 111 112 module_hid_driver(holtek_mouse_driver); 113 MODULE_LICENSE("GPL"); 114