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148 lines
3.6 KiB
148 lines
3.6 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* HID driver for Google Fiber TV Box remote controls |
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* |
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* Copyright (c) 2014-2015 Google Inc. |
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* |
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* Author: Petri Gynther <[email protected]> |
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*/ |
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#include <linux/device.h> |
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#include <linux/hid.h> |
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#include <linux/input.h> |
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#include <linux/module.h> |
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#include "hid-ids.h" |
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#define GFRM100 1 /* Google Fiber GFRM100 (Bluetooth classic) */ |
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#define GFRM200 2 /* Google Fiber GFRM200 (Bluetooth LE) */ |
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#define GFRM100_SEARCH_KEY_REPORT_ID 0xF7 |
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#define GFRM100_SEARCH_KEY_DOWN 0x0 |
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#define GFRM100_SEARCH_KEY_AUDIO_DATA 0x1 |
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#define GFRM100_SEARCH_KEY_UP 0x2 |
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static u8 search_key_dn[3] = {0x40, 0x21, 0x02}; |
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static u8 search_key_up[3] = {0x40, 0x00, 0x00}; |
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static int gfrm_input_mapping(struct hid_device *hdev, struct hid_input *hi, |
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struct hid_field *field, struct hid_usage *usage, |
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unsigned long **bit, int *max) |
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{ |
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unsigned long hdev_type = (unsigned long) hid_get_drvdata(hdev); |
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if (hdev_type == GFRM100) { |
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if (usage->hid == (HID_UP_CONSUMER | 0x4)) { |
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/* Consumer.0004 -> KEY_INFO */ |
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hid_map_usage_clear(hi, usage, bit, max, EV_KEY, KEY_INFO); |
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return 1; |
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} |
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if (usage->hid == (HID_UP_CONSUMER | 0x41)) { |
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/* Consumer.0041 -> KEY_OK */ |
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hid_map_usage_clear(hi, usage, bit, max, EV_KEY, KEY_OK); |
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return 1; |
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} |
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} |
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return 0; |
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} |
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static int gfrm_raw_event(struct hid_device *hdev, struct hid_report *report, |
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u8 *data, int size) |
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{ |
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unsigned long hdev_type = (unsigned long) hid_get_drvdata(hdev); |
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int ret = 0; |
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if (hdev_type != GFRM100) |
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return 0; |
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if (size < 2 || data[0] != GFRM100_SEARCH_KEY_REPORT_ID) |
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return 0; |
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/* |
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* Convert GFRM100 Search key reports into Consumer.0221 (Key.Search) |
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* reports. Ignore audio data. |
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*/ |
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switch (data[1]) { |
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case GFRM100_SEARCH_KEY_DOWN: |
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ret = hid_report_raw_event(hdev, HID_INPUT_REPORT, search_key_dn, |
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sizeof(search_key_dn), 1); |
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break; |
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case GFRM100_SEARCH_KEY_AUDIO_DATA: |
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break; |
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case GFRM100_SEARCH_KEY_UP: |
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ret = hid_report_raw_event(hdev, HID_INPUT_REPORT, search_key_up, |
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sizeof(search_key_up), 1); |
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break; |
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default: |
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break; |
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} |
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return (ret < 0) ? ret : -1; |
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} |
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static int gfrm_input_configured(struct hid_device *hid, struct hid_input *hidinput) |
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{ |
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/* |
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* Enable software autorepeat with: |
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* - repeat delay: 400 msec |
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* - repeat period: 100 msec |
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*/ |
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input_enable_softrepeat(hidinput->input, 400, 100); |
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return 0; |
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} |
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static int gfrm_probe(struct hid_device *hdev, const struct hid_device_id *id) |
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{ |
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int ret; |
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hid_set_drvdata(hdev, (void *) id->driver_data); |
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ret = hid_parse(hdev); |
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if (ret) |
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goto done; |
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if (id->driver_data == GFRM100) { |
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/* |
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* GFRM100 HID Report Descriptor does not describe the Search |
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* key reports. Thus, we need to add it manually here, so that |
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* those reports reach gfrm_raw_event() from hid_input_report(). |
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*/ |
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if (!hid_register_report(hdev, HID_INPUT_REPORT, |
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GFRM100_SEARCH_KEY_REPORT_ID, 0)) { |
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ret = -ENOMEM; |
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goto done; |
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} |
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} |
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ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT); |
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done: |
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return ret; |
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} |
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static const struct hid_device_id gfrm_devices[] = { |
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{ HID_BLUETOOTH_DEVICE(0x58, 0x2000), |
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.driver_data = GFRM100 }, |
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{ HID_BLUETOOTH_DEVICE(0x471, 0x2210), |
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.driver_data = GFRM200 }, |
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{ } |
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}; |
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MODULE_DEVICE_TABLE(hid, gfrm_devices); |
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static struct hid_driver gfrm_driver = { |
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.name = "gfrm", |
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.id_table = gfrm_devices, |
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.probe = gfrm_probe, |
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.input_mapping = gfrm_input_mapping, |
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.raw_event = gfrm_raw_event, |
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.input_configured = gfrm_input_configured, |
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}; |
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module_hid_driver(gfrm_driver); |
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MODULE_AUTHOR("Petri Gynther <[email protected]>"); |
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MODULE_DESCRIPTION("Google Fiber TV Box remote control driver"); |
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MODULE_LICENSE("GPL");
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