1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * USB HID driver for Glorious PC Gaming Race 4 * Glorious Model O, O- and D mice. 5 * 6 * Copyright (c) 2020 Samuel Čavoj <sammko@sammserver.com> 7 */ 8 9 /* 10 */ 11 12 #include <linux/hid.h> 13 #include <linux/module.h> 14 15 #include "hid-ids.h" 16 17 MODULE_AUTHOR("Samuel Čavoj <sammko@sammserver.com>"); 18 MODULE_DESCRIPTION("HID driver for Glorious PC Gaming Race mice"); 19 20 /* 21 * Glorious Model O and O- specify the const flag in the consumer input 22 * report descriptor, which leads to inputs being ignored. Fix this 23 * by patching the descriptor. 24 */ 25 static __u8 *glorious_report_fixup(struct hid_device *hdev, __u8 *rdesc, 26 unsigned int *rsize) 27 { 28 if (*rsize == 213 && 29 rdesc[84] == 129 && rdesc[112] == 129 && rdesc[140] == 129 && 30 rdesc[85] == 3 && rdesc[113] == 3 && rdesc[141] == 3) { 31 hid_info(hdev, "patching Glorious Model O consumer control report descriptor\n"); 32 rdesc[85] = rdesc[113] = rdesc[141] = \ 33 HID_MAIN_ITEM_VARIABLE | HID_MAIN_ITEM_RELATIVE; 34 } 35 return rdesc; 36 } 37 38 static void glorious_update_name(struct hid_device *hdev) 39 { 40 const char *model = "Device"; 41 42 switch (hdev->product) { 43 case USB_DEVICE_ID_GLORIOUS_MODEL_O: 44 model = "Model O"; break; 45 case USB_DEVICE_ID_GLORIOUS_MODEL_D: 46 model = "Model D"; break; 47 } 48 49 snprintf(hdev->name, sizeof(hdev->name), "%s %s", "Glorious", model); 50 } 51 52 static int glorious_probe(struct hid_device *hdev, 53 const struct hid_device_id *id) 54 { 55 int ret; 56 57 hdev->quirks |= HID_QUIRK_INPUT_PER_APP; 58 59 ret = hid_parse(hdev); 60 if (ret) 61 return ret; 62 63 glorious_update_name(hdev); 64 65 return hid_hw_start(hdev, HID_CONNECT_DEFAULT); 66 } 67 68 static const struct hid_device_id glorious_devices[] = { 69 { HID_USB_DEVICE(USB_VENDOR_ID_GLORIOUS, 70 USB_DEVICE_ID_GLORIOUS_MODEL_O) }, 71 { HID_USB_DEVICE(USB_VENDOR_ID_GLORIOUS, 72 USB_DEVICE_ID_GLORIOUS_MODEL_D) }, 73 { } 74 }; 75 MODULE_DEVICE_TABLE(hid, glorious_devices); 76 77 static struct hid_driver glorious_driver = { 78 .name = "glorious", 79 .id_table = glorious_devices, 80 .probe = glorious_probe, 81 .report_fixup = glorious_report_fixup 82 }; 83 84 module_hid_driver(glorious_driver); 85 86 MODULE_LICENSE("GPL"); 87