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 * Glorious Model I incorrectly specifes the Usage Minimum for its 26 * keyboard HID report, causing keycodes to be misinterpreted. 27 * Fix this by setting Usage Minimum to 0 in that report. 28 */ 29 static const __u8 *glorious_report_fixup(struct hid_device *hdev, __u8 *rdesc, 30 unsigned int *rsize) 31 { 32 if (*rsize == 213 && 33 rdesc[84] == 129 && rdesc[112] == 129 && rdesc[140] == 129 && 34 rdesc[85] == 3 && rdesc[113] == 3 && rdesc[141] == 3) { 35 hid_info(hdev, "patching Glorious Model O consumer control report descriptor\n"); 36 rdesc[85] = rdesc[113] = rdesc[141] = \ 37 HID_MAIN_ITEM_VARIABLE | HID_MAIN_ITEM_RELATIVE; 38 } 39 if (*rsize == 156 && rdesc[41] == 1) { 40 hid_info(hdev, "patching Glorious Model I keyboard report descriptor\n"); 41 rdesc[41] = 0; 42 } 43 return rdesc; 44 } 45 46 static void glorious_update_name(struct hid_device *hdev) 47 { 48 const char *model = "Device"; 49 50 switch (hdev->product) { 51 case USB_DEVICE_ID_GLORIOUS_MODEL_O: 52 model = "Model O"; break; 53 case USB_DEVICE_ID_GLORIOUS_MODEL_D: 54 model = "Model D"; break; 55 case USB_DEVICE_ID_GLORIOUS_MODEL_I: 56 model = "Model I"; break; 57 } 58 59 snprintf(hdev->name, sizeof(hdev->name), "%s %s", "Glorious", model); 60 } 61 62 static int glorious_probe(struct hid_device *hdev, 63 const struct hid_device_id *id) 64 { 65 int ret; 66 67 hdev->quirks |= HID_QUIRK_INPUT_PER_APP; 68 69 ret = hid_parse(hdev); 70 if (ret) 71 return ret; 72 73 glorious_update_name(hdev); 74 75 return hid_hw_start(hdev, HID_CONNECT_DEFAULT); 76 } 77 78 static const struct hid_device_id glorious_devices[] = { 79 { HID_USB_DEVICE(USB_VENDOR_ID_SINOWEALTH, 80 USB_DEVICE_ID_GLORIOUS_MODEL_O) }, 81 { HID_USB_DEVICE(USB_VENDOR_ID_SINOWEALTH, 82 USB_DEVICE_ID_GLORIOUS_MODEL_D) }, 83 { HID_USB_DEVICE(USB_VENDOR_ID_LAVIEW, 84 USB_DEVICE_ID_GLORIOUS_MODEL_I) }, 85 { } 86 }; 87 MODULE_DEVICE_TABLE(hid, glorious_devices); 88 89 static struct hid_driver glorious_driver = { 90 .name = "glorious", 91 .id_table = glorious_devices, 92 .probe = glorious_probe, 93 .report_fixup = glorious_report_fixup 94 }; 95 96 module_hid_driver(glorious_driver); 97 98 MODULE_LICENSE("GPL"); 99