hid-sunplus.c

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/*
 *  HID driver for some sunplus "special" devices
 *
 *  Copyright (c) 1999 Andreas Gal
 *  Copyright (c) 2000-2005 Vojtech Pavlik <[email protected]>
 *  Copyright (c) 2005 Michael Haboustak <[email protected]> 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"

static __u8 *sp_report_fixup(struct hid_device *hdev, __u8 *rdesc,
        unsigned int *rsize)
{
    if (*rsize >= 107 && rdesc[104] == 0x26 && rdesc[105] == 0x80 &&
            rdesc[106] == 0x03) {
        hid_info(hdev, "fixing up Sunplus Wireless Desktop report descriptor\n");
        rdesc[105] = rdesc[110] = 0x03;
        rdesc[106] = rdesc[111] = 0x21;
    }
    return rdesc;
}

#define sp_map_key_clear(c) hid_map_usage_clear(hi, usage, bit, max, \
        EV_KEY, (c))
static int sp_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 0x2003: sp_map_key_clear(KEY_ZOOMIN);      break;
    case 0x2103: sp_map_key_clear(KEY_ZOOMOUT); break;
    default:
        return 0;
    }
    return 1;
}

static const struct hid_device_id sp_devices[] = {
    { HID_USB_DEVICE(USB_VENDOR_ID_SUNPLUS, USB_DEVICE_ID_SUNPLUS_WDESKTOP) },
    { }
};
MODULE_DEVICE_TABLE(hid, sp_devices);

static struct hid_driver sp_driver = {
    .name = "sunplus",
    .id_table = sp_devices,
    .report_fixup = sp_report_fixup,
    .input_mapping = sp_input_mapping,
};

static int __init sp_init(void)
{
    return hid_register_driver(&sp_driver);
}

static void __exit sp_exit(void)
{
    hid_unregister_driver(&sp_driver);
}

module_init(sp_init);
module_exit(sp_exit);
MODULE_LICENSE("GPL");