Merge tag 'afs-fixes-20231124' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowe...
[linux-2.6-microblaze.git] / drivers / hid / hid-gfrm.c
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * HID driver for Google Fiber TV Box remote controls
4  *
5  * Copyright (c) 2014-2015 Google Inc.
6  *
7  * Author: Petri Gynther <pgynther@google.com>
8  */
9 #include <linux/device.h>
10 #include <linux/hid.h>
11 #include <linux/input.h>
12 #include <linux/module.h>
13
14 #include "hid-ids.h"
15
16 #define GFRM100  1  /* Google Fiber GFRM100 (Bluetooth classic) */
17 #define GFRM200  2  /* Google Fiber GFRM200 (Bluetooth LE) */
18
19 #define GFRM100_SEARCH_KEY_REPORT_ID   0xF7
20 #define GFRM100_SEARCH_KEY_DOWN        0x0
21 #define GFRM100_SEARCH_KEY_AUDIO_DATA  0x1
22 #define GFRM100_SEARCH_KEY_UP          0x2
23
24 static u8 search_key_dn[3] = {0x40, 0x21, 0x02};
25 static u8 search_key_up[3] = {0x40, 0x00, 0x00};
26
27 static int gfrm_input_mapping(struct hid_device *hdev, struct hid_input *hi,
28                 struct hid_field *field, struct hid_usage *usage,
29                 unsigned long **bit, int *max)
30 {
31         unsigned long hdev_type = (unsigned long) hid_get_drvdata(hdev);
32
33         if (hdev_type == GFRM100) {
34                 if (usage->hid == (HID_UP_CONSUMER | 0x4)) {
35                         /* Consumer.0004 -> KEY_INFO */
36                         hid_map_usage_clear(hi, usage, bit, max, EV_KEY, KEY_INFO);
37                         return 1;
38                 }
39
40                 if (usage->hid == (HID_UP_CONSUMER | 0x41)) {
41                         /* Consumer.0041 -> KEY_OK */
42                         hid_map_usage_clear(hi, usage, bit, max, EV_KEY, KEY_OK);
43                         return 1;
44                 }
45         }
46
47         return 0;
48 }
49
50 static int gfrm_raw_event(struct hid_device *hdev, struct hid_report *report,
51                 u8 *data, int size)
52 {
53         unsigned long hdev_type = (unsigned long) hid_get_drvdata(hdev);
54         int ret = 0;
55
56         if (hdev_type != GFRM100)
57                 return 0;
58
59         if (size < 2 || data[0] != GFRM100_SEARCH_KEY_REPORT_ID)
60                 return 0;
61
62         /*
63          * Convert GFRM100 Search key reports into Consumer.0221 (Key.Search)
64          * reports. Ignore audio data.
65          */
66         switch (data[1]) {
67         case GFRM100_SEARCH_KEY_DOWN:
68                 ret = hid_report_raw_event(hdev, HID_INPUT_REPORT, search_key_dn,
69                                            sizeof(search_key_dn), 1);
70                 break;
71
72         case GFRM100_SEARCH_KEY_AUDIO_DATA:
73                 break;
74
75         case GFRM100_SEARCH_KEY_UP:
76                 ret = hid_report_raw_event(hdev, HID_INPUT_REPORT, search_key_up,
77                                            sizeof(search_key_up), 1);
78                 break;
79
80         default:
81                 break;
82         }
83
84         return (ret < 0) ? ret : -1;
85 }
86
87 static int gfrm_input_configured(struct hid_device *hid, struct hid_input *hidinput)
88 {
89         /*
90          * Enable software autorepeat with:
91          * - repeat delay: 400 msec
92          * - repeat period: 100 msec
93          */
94         input_enable_softrepeat(hidinput->input, 400, 100);
95         return 0;
96 }
97
98 static int gfrm_probe(struct hid_device *hdev, const struct hid_device_id *id)
99 {
100         int ret;
101
102         hid_set_drvdata(hdev, (void *) id->driver_data);
103
104         ret = hid_parse(hdev);
105         if (ret)
106                 goto done;
107
108         if (id->driver_data == GFRM100) {
109                 /*
110                  * GFRM100 HID Report Descriptor does not describe the Search
111                  * key reports. Thus, we need to add it manually here, so that
112                  * those reports reach gfrm_raw_event() from hid_input_report().
113                  */
114                 if (!hid_register_report(hdev, HID_INPUT_REPORT,
115                                          GFRM100_SEARCH_KEY_REPORT_ID, 0)) {
116                         ret = -ENOMEM;
117                         goto done;
118                 }
119         }
120
121         ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
122 done:
123         return ret;
124 }
125
126 static const struct hid_device_id gfrm_devices[] = {
127         { HID_BLUETOOTH_DEVICE(0x58, 0x2000),
128                 .driver_data = GFRM100 },
129         { HID_BLUETOOTH_DEVICE(0x471, 0x2210),
130                 .driver_data = GFRM200 },
131         { }
132 };
133 MODULE_DEVICE_TABLE(hid, gfrm_devices);
134
135 static struct hid_driver gfrm_driver = {
136         .name = "gfrm",
137         .id_table = gfrm_devices,
138         .probe = gfrm_probe,
139         .input_mapping = gfrm_input_mapping,
140         .raw_event = gfrm_raw_event,
141         .input_configured = gfrm_input_configured,
142 };
143
144 module_hid_driver(gfrm_driver);
145
146 MODULE_AUTHOR("Petri Gynther <pgynther@google.com>");
147 MODULE_DESCRIPTION("Google Fiber TV Box remote control driver");
148 MODULE_LICENSE("GPL");