linux-imx

/*

*  HID driver for zydacron remote control

*

*  Copyright (c) 2010 Don Prince <dhprince.devel@yahoo.co.uk>

*/

​

/*

* 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/module.h>

​

#include "hid-ids.h"

​

struct zc_device {

    struct input_dev    *input_ep81;

    unsigned short      last_key[4];

};

​

​

/*

* Zydacron remote control has an invalid HID report descriptor,

* that needs fixing before we can parse it.

*/

static __u8 *zc_report_fixup(struct hid_device *hdev, __u8 *rdesc,

    unsigned int *rsize)

{

    if (*rsize >= 253 &&

        rdesc[0x96] == 0xbc && rdesc[0x97] == 0xff &&

        rdesc[0xca] == 0xbc && rdesc[0xcb] == 0xff &&

        rdesc[0xe1] == 0xbc && rdesc[0xe2] == 0xff) {

            hid_info(hdev,

                "fixing up zydacron remote control report descriptor\n");

            rdesc[0x96] = rdesc[0xca] = rdesc[0xe1] = 0x0c;

            rdesc[0x97] = rdesc[0xcb] = rdesc[0xe2] = 0x00;

        }

    return rdesc;

}

​

#define zc_map_key_clear(c) \

    hid_map_usage_clear(hi, usage, bit, max, EV_KEY, (c))

​

static int zc_input_mapping(struct hid_device *hdev, struct hid_input *hi,

    struct hid_field *field, struct hid_usage *usage,

    unsigned long **bit, int *max)

{

    int i;

    struct zc_device *zc = hid_get_drvdata(hdev);

    zc->input_ep81 = hi->input;

​

    if ((usage->hid & HID_USAGE_PAGE) != HID_UP_CONSUMER)

        return 0;

​

    dbg_hid("zynacron input mapping event [0x%x]\n",

        usage->hid & HID_USAGE);

​

    switch (usage->hid & HID_USAGE) {

    /* report 2 */