linux-imx

/*

 *  HID driver for some cherry "special" devices

 *

 *  Copyright (c) 1999 Andreas Gal

 *  Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>

 *  Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc

 *  Copyright (c) 2006-2007 Jiri Kosina

 *  Copyright (c) 2008 Jiri Slaby

 */

​

/*

 * 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"

​

/*

 * Cherry Cymotion keyboard have an invalid HID report descriptor,

 * that needs fixing before we can parse it.

 */

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

        unsigned int *rsize)

{

    if (*rsize >= 18 && rdesc[11] == 0x3c && rdesc[12] == 0x02) {

        hid_info(hdev, "fixing up Cherry Cymotion report descriptor\n");

        rdesc[11] = rdesc[16] = 0xff;

        rdesc[12] = rdesc[17] = 0x03;

    }

    return rdesc;

}

​

#define ch_map_key_clear(c) hid_map_usage_clear(hi, usage, bit, max, \

                    EV_KEY, (c))

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

        struct hid_field *field, struct hid_usage *usage,

        unsigned long **bit, int *max)

{

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

        return 0;

​

    switch (usage->hid & HID_USAGE) {

    case 0x301: ch_map_key_clear(KEY_PROG1);    break;

    case 0x302: ch_map_key_clear(KEY_PROG2);    break;

    case 0x303: ch_map_key_clear(KEY_PROG3);    break;

    default:

        return 0;

    }

​

    return 1;

}

​

static const struct hid_device_id ch_devices[] = {

    { HID_USB_DEVICE(USB_VENDOR_ID_CHERRY, USB_DEVICE_ID_CHERRY_CYMOTION) },

    { HID_USB_DEVICE(USB_VENDOR_ID_CHERRY, USB_DEVICE_ID_CHERRY_CYMOTION_SOLAR) },

    { }

};