[linux-2.6-block.git] / drivers / hid / hid-roccat-common.c

/*
 * Roccat common functions for device specific drivers
 *
 * Copyright (c) 2011 Stefan Achatz <erazor_de@users.sourceforge.net>
 */

/*
 * 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/hid.h>
#include <linux/slab.h>
#include <linux/module.h>
#include "hid-roccat-common.h"

static inline uint16_t roccat_common_feature_report(uint8_t report_id)
{
	return 0x300 | report_id;
}

int roccat_common_receive(struct usb_device *usb_dev, uint report_id,
		void *data, uint size)
{
	char *buf;
	int len;

	buf = kmalloc(size, GFP_KERNEL);
	if (buf == NULL)
		return -ENOMEM;

	len = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0),
			HID_REQ_GET_REPORT,
			USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
			roccat_common_feature_report(report_id),
			0, buf, size, USB_CTRL_SET_TIMEOUT);

	memcpy(data, buf, size);
	kfree(buf);
	return ((len < 0) ? len : ((len != size) ? -EIO : 0));
}
EXPORT_SYMBOL_GPL(roccat_common_receive);

int roccat_common_send(struct usb_device *usb_dev, uint report_id,
		void const *data, uint size)
{
	char *buf;
	int len;

	buf = kmemdup(data, size, GFP_KERNEL);
	if (buf == NULL)
		return -ENOMEM;

	len = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0),
			HID_REQ_SET_REPORT,
			USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_OUT,
			roccat_common_feature_report(report_id),
			0, buf, size, USB_CTRL_SET_TIMEOUT);

	kfree(buf);
	return ((len < 0) ? len : ((len != size) ? -EIO : 0));
}
EXPORT_SYMBOL_GPL(roccat_common_send);

MODULE_AUTHOR("Stefan Achatz");
MODULE_DESCRIPTION("USB Roccat common driver");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
5772f636 SA	1	/*
	2	* Roccat common functions for device specific drivers
	3	*
	4	* Copyright (c) 2011 Stefan Achatz <erazor_de@users.sourceforge.net>
	5	*/
	6
	7	/*
	8	* This program is free software; you can redistribute it and/or modify it
	9	* under the terms of the GNU General Public License as published by the Free
	10	* Software Foundation; either version 2 of the License, or (at your option)
	11	* any later version.
	12	*/
	13
1edd5b42	14	#include <linux/hid.h>
5772f636	15	#include <linux/slab.h>
8f86a2c3	16	#include <linux/module.h>
5772f636 SA	17	#include "hid-roccat-common.h"
5772f636 SA	18
1edd5b42 SA	19	static inline uint16_t roccat_common_feature_report(uint8_t report_id)
	20	{
	21	return 0x300 \| report_id;
	22	}
	23
	24	int roccat_common_receive(struct usb_device *usb_dev, uint report_id,
5772f636 SA	25	void *data, uint size)
	26	{
	27	char *buf;
	28	int len;
	29
	30	buf = kmalloc(size, GFP_KERNEL);
	31	if (buf == NULL)
	32	return -ENOMEM;
	33
	34	len = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0),
1edd5b42	35	HID_REQ_GET_REPORT,
5772f636	36	USB_TYPE_CLASS \| USB_RECIP_INTERFACE \| USB_DIR_IN,
1edd5b42 SA	37	roccat_common_feature_report(report_id),
1edd5b42 SA	38	0, buf, size, USB_CTRL_SET_TIMEOUT);
5772f636 SA	39
	40	memcpy(data, buf, size);
	41	kfree(buf);
	42	return ((len < 0) ? len : ((len != size) ? -EIO : 0));
	43	}
	44	EXPORT_SYMBOL_GPL(roccat_common_receive);
	45
1edd5b42	46	int roccat_common_send(struct usb_device *usb_dev, uint report_id,
5772f636 SA	47	void const *data, uint size)
	48	{
	49	char *buf;
	50	int len;
	51
4c33a885	52	buf = kmemdup(data, size, GFP_KERNEL);
5772f636 SA	53	if (buf == NULL)
	54	return -ENOMEM;
	55
5772f636	56	len = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0),
1edd5b42	57	HID_REQ_SET_REPORT,
5772f636	58	USB_TYPE_CLASS \| USB_RECIP_INTERFACE \| USB_DIR_OUT,
1edd5b42 SA	59	roccat_common_feature_report(report_id),
1edd5b42 SA	60	0, buf, size, USB_CTRL_SET_TIMEOUT);
5772f636 SA	61
	62	kfree(buf);
	63	return ((len < 0) ? len : ((len != size) ? -EIO : 0));
	64	}
	65	EXPORT_SYMBOL_GPL(roccat_common_send);
	66
	67	MODULE_AUTHOR("Stefan Achatz");
	68	MODULE_DESCRIPTION("USB Roccat common driver");
	69	MODULE_LICENSE("GPL v2");