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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/drivers/hid/hid-petalynx.c
15109 views
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/*

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 *  HID driver for some petalynx "special" devices

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 *

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 *  Copyright (c) 1999 Andreas Gal

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 *  Copyright (c) 2000-2005 Vojtech Pavlik <[email protected]>

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 *  Copyright (c) 2005 Michael Haboustak <[email protected]> for Concept2, Inc

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 *  Copyright (c) 2006-2007 Jiri Kosina

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 *  Copyright (c) 2007 Paul Walmsley

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 *  Copyright (c) 2008 Jiri Slaby

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 */

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/*

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 * This program is free software; you can redistribute it and/or modify it

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 * under the terms of the GNU General Public License as published by the Free

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 * Software Foundation; either version 2 of the License, or (at your option)

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 * any later version.

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 */

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#include <linux/device.h>

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#include <linux/hid.h>

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#include <linux/module.h>

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#include "hid-ids.h"

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/* Petalynx Maxter Remote has maximum for consumer page set too low */

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

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		unsigned int *rsize)

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{

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	if (*rsize >= 60 && rdesc[39] == 0x2a && rdesc[40] == 0xf5 &&

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			rdesc[41] == 0x00 && rdesc[59] == 0x26 &&

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			rdesc[60] == 0xf9 && rdesc[61] == 0x00) {

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		hid_info(hdev, "fixing up Petalynx Maxter Remote report descriptor\n");

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		rdesc[60] = 0xfa;

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		rdesc[40] = 0xfa;

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	}

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	return rdesc;

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}

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

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					EV_KEY, (c))

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

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		struct hid_field *field, struct hid_usage *usage,

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		unsigned long **bit, int *max)

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{

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	if ((usage->hid & HID_USAGE_PAGE) == HID_UP_LOGIVENDOR) {

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		switch (usage->hid & HID_USAGE) {

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		case 0x05a: pl_map_key_clear(KEY_TEXT);		break;

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		case 0x05b: pl_map_key_clear(KEY_RED);		break;

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		case 0x05c: pl_map_key_clear(KEY_GREEN);	break;

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		case 0x05d: pl_map_key_clear(KEY_YELLOW);	break;

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		case 0x05e: pl_map_key_clear(KEY_BLUE);		break;

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		default:

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			return 0;

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		}

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		return 1;

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	}

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

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		switch (usage->hid & HID_USAGE) {

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		case 0x0f6: pl_map_key_clear(KEY_NEXT);		break;

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		case 0x0fa: pl_map_key_clear(KEY_BACK);		break;

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		default:

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			return 0;

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		}

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		return 1;

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	}

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	return 0;

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}

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

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{

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	int ret;

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	hdev->quirks |= HID_QUIRK_NOGET;

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	ret = hid_parse(hdev);

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	if (ret) {

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		hid_err(hdev, "parse failed\n");

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		goto err_free;

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	}

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	ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);

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	if (ret) {

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		hid_err(hdev, "hw start failed\n");

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		goto err_free;

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	}

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	return 0;

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err_free:

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	return ret;

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}

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static const struct hid_device_id pl_devices[] = {

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	{ HID_USB_DEVICE(USB_VENDOR_ID_PETALYNX, USB_DEVICE_ID_PETALYNX_MAXTER_REMOTE) },

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	{ }

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};

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MODULE_DEVICE_TABLE(hid, pl_devices);

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static struct hid_driver pl_driver = {

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	.name = "petalynx",

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	.id_table = pl_devices,

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	.report_fixup = pl_report_fixup,

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	.input_mapping = pl_input_mapping,

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	.probe = pl_probe,

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};

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static int __init pl_init(void)

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{

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	return hid_register_driver(&pl_driver);

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}

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static void __exit pl_exit(void)

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{

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	hid_unregister_driver(&pl_driver);

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}

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module_init(pl_init);

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module_exit(pl_exit);

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MODULE_LICENSE("GPL");

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