drivers/hid/hid-glorious.c

   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 __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");