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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
34fc1322 PG |
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> | |
34fc1322 PG |
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 | ||
e60e063c | 87 | static int gfrm_input_configured(struct hid_device *hid, struct hid_input *hidinput) |
34fc1322 PG |
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); | |
e60e063c | 95 | return 0; |
34fc1322 PG |
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, | |
f07b3c1d | 115 | GFRM100_SEARCH_KEY_REPORT_ID, 0)) { |
34fc1322 PG |
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 | ||
34fc1322 PG |
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, | |
34fc1322 PG |
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"); |