projects / mirror_ubuntu-artful-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 34fc1322 PG |
1 | /* |
| 2 | * HID driver for Google Fiber TV Box remote controls | |
| 3 | * | |
| 4 | * Copyright (c) 2014-2015 Google Inc. | |
| 5 | * | |
| 6 | * Author: Petri Gynther <pgynther@google.com> | |
| 7 | * | |
| 8 | * This program is free software; you can redistribute it and/or modify it | |
| 9 | * under the terms of the GNU General Public License as published by the Free | |
| 10 | * Software Foundation; either version 2 of the License, or (at your option) | |
| 11 | * any later version. | |
| 12 | */ | |
| 13 | #include <linux/device.h> | |
| 14 | #include <linux/hid.h> | |
| 15 | #include <linux/input.h> | |
| 16 | #include <linux/module.h> | |
| 17 | ||
| 18 | #include "hid-ids.h" | |
| 19 | ||
| 20 | #define GFRM100 1 /* Google Fiber GFRM100 (Bluetooth classic) */ | |
| 21 | #define GFRM200 2 /* Google Fiber GFRM200 (Bluetooth LE) */ | |
| 22 | ||
| 23 | #define GFRM100_SEARCH_KEY_REPORT_ID 0xF7 | |
| 24 | #define GFRM100_SEARCH_KEY_DOWN 0x0 | |
| 25 | #define GFRM100_SEARCH_KEY_AUDIO_DATA 0x1 | |
| 26 | #define GFRM100_SEARCH_KEY_UP 0x2 | |
| 27 | ||
| 28 | static u8 search_key_dn[3] = {0x40, 0x21, 0x02}; | |
| 29 | static u8 search_key_up[3] = {0x40, 0x00, 0x00}; | |
| 30 | ||
| 31 | static int gfrm_input_mapping(struct hid_device *hdev, struct hid_input *hi, | |
| 32 | struct hid_field *field, struct hid_usage *usage, | |
| 33 | unsigned long **bit, int *max) | |
| 34 | { | |
| 35 | unsigned long hdev_type = (unsigned long) hid_get_drvdata(hdev); | |
| 36 | ||
| 37 | if (hdev_type == GFRM100) { | |
| 38 | if (usage->hid == (HID_UP_CONSUMER | 0x4)) { | |
| 39 | /* Consumer.0004 -> KEY_INFO */ | |
| 40 | hid_map_usage_clear(hi, usage, bit, max, EV_KEY, KEY_INFO); | |
| 41 | return 1; | |
| 42 | } | |
| 43 | ||
| 44 | if (usage->hid == (HID_UP_CONSUMER | 0x41)) { | |
| 45 | /* Consumer.0041 -> KEY_OK */ | |
| 46 | hid_map_usage_clear(hi, usage, bit, max, EV_KEY, KEY_OK); | |
| 47 | return 1; | |
| 48 | } | |
| 49 | } | |
| 50 | ||
| 51 | return 0; | |
| 52 | } | |
| 53 | ||
| 54 | static int gfrm_raw_event(struct hid_device *hdev, struct hid_report *report, | |
| 55 | u8 *data, int size) | |
| 56 | { | |
| 57 | unsigned long hdev_type = (unsigned long) hid_get_drvdata(hdev); | |
| 58 | int ret = 0; | |
| 59 | ||
| 60 | if (hdev_type != GFRM100) | |
| 61 | return 0; | |
| 62 | ||
| 63 | if (size < 2 || data[0] != GFRM100_SEARCH_KEY_REPORT_ID) | |
| 64 | return 0; | |
| 65 | ||
| 66 | /* | |
| 67 | * Convert GFRM100 Search key reports into Consumer.0221 (Key.Search) | |
| 68 | * reports. Ignore audio data. | |
| 69 | */ | |
| 70 | switch (data[1]) { | |
| 71 | case GFRM100_SEARCH_KEY_DOWN: | |
| 72 | ret = hid_report_raw_event(hdev, HID_INPUT_REPORT, search_key_dn, | |
| 73 | sizeof(search_key_dn), 1); | |
| 74 | break; | |
| 75 | ||
| 76 | case GFRM100_SEARCH_KEY_AUDIO_DATA: | |
| 77 | break; | |
| 78 | ||
| 79 | case GFRM100_SEARCH_KEY_UP: | |
| 80 | ret = hid_report_raw_event(hdev, HID_INPUT_REPORT, search_key_up, | |
| 81 | sizeof(search_key_up), 1); | |
| 82 | break; | |
| 83 | ||
| 84 | default: | |
| 85 | break; | |
| 86 | } | |
| 87 | ||
| 88 | return (ret < 0) ? ret : -1; | |
| 89 | } | |
| 90 | ||
| e60e063c | 91 | static int gfrm_input_configured(struct hid_device *hid, struct hid_input *hidinput) |
| 34fc1322 PG |
92 | { |
| 93 | /* | |
| 94 | * Enable software autorepeat with: | |
| 95 | * - repeat delay: 400 msec | |
| 96 | * - repeat period: 100 msec | |
| 97 | */ | |
| 98 | input_enable_softrepeat(hidinput->input, 400, 100); | |
| e60e063c | 99 | return 0; |
| 34fc1322 PG |
100 | } |
| 101 | ||
| 102 | static int gfrm_probe(struct hid_device *hdev, const struct hid_device_id *id) | |
| 103 | { | |
| 104 | int ret; | |
| 105 | ||
| 106 | hid_set_drvdata(hdev, (void *) id->driver_data); | |
| 107 | ||
| 108 | ret = hid_parse(hdev); | |
| 109 | if (ret) | |
| 110 | goto done; | |
| 111 | ||
| 112 | if (id->driver_data == GFRM100) { | |
| 113 | /* | |
| 114 | * GFRM100 HID Report Descriptor does not describe the Search | |
| 115 | * key reports. Thus, we need to add it manually here, so that | |
| 116 | * those reports reach gfrm_raw_event() from hid_input_report(). | |
| 117 | */ | |
| 118 | if (!hid_register_report(hdev, HID_INPUT_REPORT, | |
| 119 | GFRM100_SEARCH_KEY_REPORT_ID)) { | |
| 120 | ret = -ENOMEM; | |
| 121 | goto done; | |
| 122 | } | |
| 123 | } | |
| 124 | ||
| 125 | ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT); | |
| 126 | done: | |
| 127 | return ret; | |
| 128 | } | |
| 129 | ||
| 130 | static void gfrm_remove(struct hid_device *hdev) | |
| 131 | { | |
| 132 | hid_hw_stop(hdev); | |
| 133 | hid_set_drvdata(hdev, NULL); | |
| 134 | } | |
| 135 | ||
| 136 | static const struct hid_device_id gfrm_devices[] = { | |
| 137 | { HID_BLUETOOTH_DEVICE(0x58, 0x2000), | |
| 138 | .driver_data = GFRM100 }, | |
| 139 | { HID_BLUETOOTH_DEVICE(0x471, 0x2210), | |
| 140 | .driver_data = GFRM200 }, | |
| 141 | { } | |
| 142 | }; | |
| 143 | MODULE_DEVICE_TABLE(hid, gfrm_devices); | |
| 144 | ||
| 145 | static struct hid_driver gfrm_driver = { | |
| 146 | .name = "gfrm", | |
| 147 | .id_table = gfrm_devices, | |
| 148 | .probe = gfrm_probe, | |
| 149 | .remove = gfrm_remove, | |
| 150 | .input_mapping = gfrm_input_mapping, | |
| 151 | .raw_event = gfrm_raw_event, | |
| 152 | .input_configured = gfrm_input_configured, | |
| 153 | }; | |
| 154 | ||
| 155 | module_hid_driver(gfrm_driver); | |
| 156 | ||
| 157 | MODULE_AUTHOR("Petri Gynther <pgynther@google.com>"); | |
| 158 | MODULE_DESCRIPTION("Google Fiber TV Box remote control driver"); | |
| 159 | MODULE_LICENSE("GPL"); |