hid-keytouch.c

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/*
 *  HID driver for Keytouch devices not fully compliant with HID standard
 *
 *  Copyright (c) 2011 Jiri Kosina
 */

/*
 * 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"

/* Replace the broken report descriptor of this device with rather
 * a default one */
static __u8 keytouch_fixed_rdesc[] = {
0x05, 0x01, 0x09, 0x06, 0xa1, 0x01, 0x05, 0x07, 0x19, 0xe0, 0x29, 0xe7, 0x15,
0x00, 0x25, 0x01, 0x75, 0x01, 0x95, 0x08, 0x81, 0x02, 0x95, 0x01, 0x75, 0x08,
0x81, 0x01, 0x95, 0x03, 0x75, 0x01, 0x05, 0x08, 0x19, 0x01, 0x29, 0x03, 0x91,
0x02, 0x95, 0x05, 0x75, 0x01, 0x91, 0x01, 0x95, 0x06, 0x75, 0x08, 0x15, 0x00,
0x26, 0xff, 0x00, 0x05, 0x07, 0x19, 0x00, 0x2a, 0xff, 0x00, 0x81, 0x00, 0xc0
};

static __u8 *keytouch_report_fixup(struct hid_device *hdev, __u8 *rdesc,
        unsigned int *rsize)
{
    hid_info(hdev, "fixing up Keytouch IEC report descriptor\n");

    rdesc = keytouch_fixed_rdesc;
    *rsize = sizeof(keytouch_fixed_rdesc);

    return rdesc;
}

static const struct hid_device_id keytouch_devices[] = {
    { HID_USB_DEVICE(USB_VENDOR_ID_KEYTOUCH, USB_DEVICE_ID_KEYTOUCH_IEC) },
    { }
};
MODULE_DEVICE_TABLE(hid, keytouch_devices);

static struct hid_driver keytouch_driver = {
    .name = "keytouch",
    .id_table = keytouch_devices,
    .report_fixup = keytouch_report_fixup,
};

static int __init keytouch_init(void)
{
    return hid_register_driver(&keytouch_driver);
}

static void __exit keytouch_exit(void)
{
    hid_unregister_driver(&keytouch_driver);
}

module_init(keytouch_init);
module_exit(keytouch_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Jiri Kosina");