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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * USB HID driver for Glorious PC Gaming Race4 * 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 17MODULE_AUTHOR("Samuel Čavoj <sammko@sammserver.com>");18MODULE_DESCRIPTION("HID driver for Glorious PC Gaming Race mice");19 20/*21 * Glorious Model O and O- specify the const flag in the consumer input22 * report descriptor, which leads to inputs being ignored. Fix this23 * by patching the descriptor.24 *25 * Glorious Model I incorrectly specifes the Usage Minimum for its26 * keyboard HID report, causing keycodes to be misinterpreted.27 * Fix this by setting Usage Minimum to 0 in that report.28 */29static 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 46static 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 62static 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 78static 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};87MODULE_DEVICE_TABLE(hid, glorious_devices);88 89static struct hid_driver glorious_driver = {90 .name = "glorious",91 .id_table = glorious_devices,92 .probe = glorious_probe,93 .report_fixup = glorious_report_fixup94};95 96module_hid_driver(glorious_driver);97 98MODULE_LICENSE("GPL");99