linux-imx

/*

 * 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)