fbmem: don't allow too huge resolutions
[linux-2.6-microblaze.git] / 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 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");