linux-imx

/*

 * HID driver for CMedia CM6533 audio jack controls

 *

 * Copyright (C) 2015 Ben Chen <ben_chen@bizlinktech.com>

 *

 * This software is licensed under the terms of the GNU General Public

 * License version 2, as published by the Free Software Foundation, and

 * may be copied, distributed, and modified under those terms.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 */

​

#include <linux/device.h>

#include <linux/hid.h>

#include <linux/module.h>

#include "hid-ids.h"

​

MODULE_AUTHOR("Ben Chen");

MODULE_DESCRIPTION("CM6533 HID jack controls");

MODULE_LICENSE("GPL");

​

#define CM6533_JD_TYPE_COUNT      1

#define CM6533_JD_RAWEV_LEN  16

#define CM6533_JD_SFX_OFFSET      8

​

/*

*

*CM6533 audio jack HID raw events:

*

*Plug in:

*01000600 002083xx 080008c0 10000000

*about 3 seconds later...

*01000a00 002083xx 08000380 10000000

*01000600 002083xx 08000380 10000000

*

*Plug out:

*01000400 002083xx 080008c0 x0000000

*/

​

static const u8 ji_sfx[] = { 0x08, 0x00, 0x08, 0xc0 };

static const u8 ji_in[]  = { 0x01, 0x00, 0x06, 0x00 };

static const u8 ji_out[] = { 0x01, 0x00, 0x04, 0x00 };

​

static int jack_switch_types[CM6533_JD_TYPE_COUNT] = {

    SW_HEADPHONE_INSERT,

};

​

struct cmhid {

    struct input_dev *input_dev;

    struct hid_device *hid;

    unsigned short switch_map[CM6533_JD_TYPE_COUNT];

};

​

static void hp_ev(struct hid_device *hid, struct cmhid *cm, int value)

{

    input_report_switch(cm->input_dev, SW_HEADPHONE_INSERT, value);

    input_sync(cm->input_dev);

}

​

static int cmhid_raw_event(struct hid_device *hid, struct hid_report *report,