/*
   * 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");