/*
* Copyright (c) 2011 Vojtech Horky
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* - The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/** @addtogroup drvusbmast
* @{
*/
/** @file
* USB mass storage commands.
*/
#include <byteorder.h>
#include <mem.h>
#include <stdint.h>
#include <usb/usb.h>
#include "cmdw.h"
void usb_massstor_cbw_prepare(usb_massstor_cbw_t *cbw,
uint32_t tag, uint32_t transfer_length, usb_direction_t dir,
uint8_t lun, uint8_t cmd_len, const uint8_t *cmd)
{
cbw->dCBWSignature = uint32_host2usb(0x43425355);
cbw->dCBWTag = tag;
cbw->dCBWDataTransferLength = transfer_length;
cbw->bmCBWFlags = 0;
if (dir == USB_DIRECTION_IN) {
cbw->bmCBWFlags |= (1 << 7);
}
/* Only lowest 4 bits. */
cbw->bCBWLUN = lun & 0x0F;
/* Only lowest 5 bits. */
cbw->bCBWBLength = cmd_len & 0x1F;
memcpy(cbw->CBWCB, cmd, cbw->bCBWBLength);
}
/**
* @}
*/