HID: add omitted hid-zydacron.c file

/*

*  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 void 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) {

			dev_info(&hdev->dev,

				"fixing up zydacron remote control report "

				"descriptor\n");

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

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

		}

}

#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 */

	case 0x10:

		zc_map_key_clear(KEY_MODE);

		break;

	case 0x30:

		zc_map_key_clear(KEY_SCREEN);

		break;

	case 0x70:

		zc_map_key_clear(KEY_INFO);

		break;

	/* report 3 */

	case 0x04:

		zc_map_key_clear(KEY_RADIO);

		break;

	/* report 4 */

	case 0x0d:

		zc_map_key_clear(KEY_PVR);

		break;

	case 0x25:

		zc_map_key_clear(KEY_TV);

		break;

	case 0x47:

		zc_map_key_clear(KEY_AUDIO);

		break;

	case 0x49:

		zc_map_key_clear(KEY_AUX);

		break;

	case 0x4a:

		zc_map_key_clear(KEY_VIDEO);

		break;

	case 0x48:

		zc_map_key_clear(KEY_DVD);

		break;

	case 0x24:

		zc_map_key_clear(KEY_MENU);

		break;

	case 0x32:

		zc_map_key_clear(KEY_TEXT);

		break;

	default:

		return 0;

	}

	for (i = 0; i < 4; i++)

		zc->last_key[i] = 0;

	return 1;

}

static int zc_raw_event(struct hid_device *hdev, struct hid_report *report,

	 u8 *data, int size)

{

	struct zc_device *zc = hid_get_drvdata(hdev);

	int ret = 0;

	unsigned key;

	unsigned short index;

	if (report->id == data[0]) {

		/* break keys */

		for (index = 0; index < 4; index++) {

			key = zc->last_key[index];

			if (key) {

				input_event(zc->input_ep81, EV_KEY, key, 0);

				zc->last_key[index] = 0;

			}

		}

		key = 0;

		switch (report->id) {

		case 0x02:

		case 0x03:

			switch (data[1]) {

			case 0x10:

				key = KEY_MODE;

				index = 0;

				break;

			case 0x30:

				key = KEY_SCREEN;

				index = 1;

				break;

			case 0x70:

				key = KEY_INFO;

				index = 2;

				break;

			case 0x04:

				key = KEY_RADIO;

				index = 3;

				break;

			}

			if (key) {

				input_event(zc->input_ep81, EV_KEY, key, 1);

				zc->last_key[index] = key;

			}

			ret = 1;

			break;

		}

	}

	return ret;

}

static int zc_probe(struct hid_device *hdev, const struct hid_device_id *id)

{

	int ret;

	struct zc_device *zc;

	zc = kzalloc(sizeof(*zc), GFP_KERNEL);

	if (zc == NULL) {

		dev_err(&hdev->dev, "zydacron: can't alloc descriptor\n");

		return -ENOMEM;

	}

	hid_set_drvdata(hdev, zc);

	ret = hid_parse(hdev);

	if (ret) {

		dev_err(&hdev->dev, "zydacron: parse failed\n");

		goto err_free;

	}

	ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);

	if (ret) {

		dev_err(&hdev->dev, "zydacron: hw start failed\n");

		goto err_free;

	}

	return 0;

err_free:

	kfree(zc);

	return ret;

}

static void zc_remove(struct hid_device *hdev)

{

	struct zc_device *zc = hid_get_drvdata(hdev);

	hid_hw_stop(hdev);

	if (NULL != zc)

		kfree(zc);

}

static const struct hid_device_id zc_devices[] = {

	{ HID_USB_DEVICE(USB_VENDOR_ID_ZYDACRON, USB_DEVICE_ID_ZYDACRON_REMOTE_CONTROL) },

	{ }

};

MODULE_DEVICE_TABLE(hid, zc_devices);

static struct hid_driver zc_driver = {

	.name = "zydacron",

	.id_table = zc_devices,

	.report_fixup = zc_report_fixup,

	.input_mapping = zc_input_mapping,

	.raw_event = zc_raw_event,

	.probe = zc_probe,

	.remove = zc_remove,

};

static int __init zc_init(void)

{

	return hid_register_driver(&zc_driver);

}

static void __exit zc_exit(void)

{

	hid_unregister_driver(&zc_driver);

}

module_init(zc_init);

module_exit(zc_exit);

MODULE_LICENSE("GPL");