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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
24static u8 search_key_dn[3] = {0x40, 0x21, 0x02};
25static u8 search_key_up[3] = {0x40, 0x00, 0x00};
26
27static 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
50static 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
87static 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
98static 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);
122done:
123 return ret;
124}
125
126static 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};
133MODULE_DEVICE_TABLE(hid, gfrm_devices);
134
135static 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
144module_hid_driver(gfrm_driver);
145
146MODULE_AUTHOR("Petri Gynther <pgynther@google.com>");
147MODULE_DESCRIPTION("Google Fiber TV Box remote control driver");
148MODULE_LICENSE("GPL");
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
24static u8 search_key_dn[3] = {0x40, 0x21, 0x02};
25static u8 search_key_up[3] = {0x40, 0x00, 0x00};
26
27static 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
50static 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
87static 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
98static 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);
122done:
123 return ret;
124}
125
126static 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};
133MODULE_DEVICE_TABLE(hid, gfrm_devices);
134
135static 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
144module_hid_driver(gfrm_driver);
145
146MODULE_AUTHOR("Petri Gynther <pgynther@google.com>");
147MODULE_DESCRIPTION("Google Fiber TV Box remote control driver");
148MODULE_LICENSE("GPL");