Home Home > GIT Browse
summaryrefslogtreecommitdiff
blob: 075b1c020846594dbe26a908ee04379a7444224e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
/*
 * HID driver for Google Fiber TV Box remote controls
 *
 * Copyright (c) 2014-2015 Google Inc.
 *
 * Author: Petri Gynther <pgynther@google.com>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the Free
 * Software Foundation; either version 2 of the License, or (at your option)
 * any later version.
 */
#include <linux/device.h>
#include <linux/hid.h>
#include <linux/input.h>
#include <linux/module.h>

#include "hid-ids.h"

#define GFRM100  1  /* Google Fiber GFRM100 (Bluetooth classic) */
#define GFRM200  2  /* Google Fiber GFRM200 (Bluetooth LE) */

#define GFRM100_SEARCH_KEY_REPORT_ID   0xF7
#define GFRM100_SEARCH_KEY_DOWN        0x0
#define GFRM100_SEARCH_KEY_AUDIO_DATA  0x1
#define GFRM100_SEARCH_KEY_UP          0x2

static u8 search_key_dn[3] = {0x40, 0x21, 0x02};
static u8 search_key_up[3] = {0x40, 0x00, 0x00};

static int gfrm_input_mapping(struct hid_device *hdev, struct hid_input *hi,
		struct hid_field *field, struct hid_usage *usage,
		unsigned long **bit, int *max)
{
	unsigned long hdev_type = (unsigned long) hid_get_drvdata(hdev);

	if (hdev_type == GFRM100) {
		if (usage->hid == (HID_UP_CONSUMER | 0x4)) {
			/* Consumer.0004 -> KEY_INFO */
			hid_map_usage_clear(hi, usage, bit, max, EV_KEY, KEY_INFO);
			return 1;
		}

		if (usage->hid == (HID_UP_CONSUMER | 0x41)) {
			/* Consumer.0041 -> KEY_OK */
			hid_map_usage_clear(hi, usage, bit, max, EV_KEY, KEY_OK);
			return 1;
		}
	}

	return 0;
}

static int gfrm_raw_event(struct hid_device *hdev, struct hid_report *report,
		u8 *data, int size)
{
	unsigned long hdev_type = (unsigned long) hid_get_drvdata(hdev);
	int ret = 0;

	if (hdev_type != GFRM100)
		return 0;

	if (size < 2 || data[0] != GFRM100_SEARCH_KEY_REPORT_ID)
		return 0;

	/*
	 * Convert GFRM100 Search key reports into Consumer.0221 (Key.Search)
	 * reports. Ignore audio data.
	 */
	switch (data[1]) {
	case GFRM100_SEARCH_KEY_DOWN:
		ret = hid_report_raw_event(hdev, HID_INPUT_REPORT, search_key_dn,
					   sizeof(search_key_dn), 1);
		break;

	case GFRM100_SEARCH_KEY_AUDIO_DATA:
		break;

	case GFRM100_SEARCH_KEY_UP:
		ret = hid_report_raw_event(hdev, HID_INPUT_REPORT, search_key_up,
					   sizeof(search_key_up), 1);
		break;

	default:
		break;
	}

	return (ret < 0) ? ret : -1;
}

static int gfrm_input_configured(struct hid_device *hid, struct hid_input *hidinput)
{
	/*
	 * Enable software autorepeat with:
	 * - repeat delay: 400 msec
	 * - repeat period: 100 msec
	 */
	input_enable_softrepeat(hidinput->input, 400, 100);
	return 0;
}

static int gfrm_probe(struct hid_device *hdev, const struct hid_device_id *id)
{
	int ret;

	hid_set_drvdata(hdev, (void *) id->driver_data);

	ret = hid_parse(hdev);
	if (ret)
		goto done;

	if (id->driver_data == GFRM100) {
		/*
		 * GFRM100 HID Report Descriptor does not describe the Search
		 * key reports. Thus, we need to add it manually here, so that
		 * those reports reach gfrm_raw_event() from hid_input_report().
		 */
		if (!hid_register_report(hdev, HID_INPUT_REPORT,
					 GFRM100_SEARCH_KEY_REPORT_ID)) {
			ret = -ENOMEM;
			goto done;
		}
	}

	ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
done:
	return ret;
}

static void gfrm_remove(struct hid_device *hdev)
{
	hid_hw_stop(hdev);
	hid_set_drvdata(hdev, NULL);
}

static const struct hid_device_id gfrm_devices[] = {
	{ HID_BLUETOOTH_DEVICE(0x58, 0x2000),
		.driver_data = GFRM100 },
	{ HID_BLUETOOTH_DEVICE(0x471, 0x2210),
		.driver_data = GFRM200 },
	{ }
};
MODULE_DEVICE_TABLE(hid, gfrm_devices);

static struct hid_driver gfrm_driver = {
	.name = "gfrm",
	.id_table = gfrm_devices,
	.probe = gfrm_probe,
	.remove = gfrm_remove,
	.input_mapping = gfrm_input_mapping,
	.raw_event = gfrm_raw_event,
	.input_configured = gfrm_input_configured,
};

module_hid_driver(gfrm_driver);

MODULE_AUTHOR("Petri Gynther <pgynther@google.com>");
MODULE_DESCRIPTION("Google Fiber TV Box remote control driver");
MODULE_LICENSE("GPL");