cmds.h

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/*
 * 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.
 */

#ifndef USB_USBMAST_CMDS_H_
#define USB_USBMAST_CMDS_H_

#include <sys/types.h>
#include <usb/usb.h>

typedef struct {
        uint32_t dCBWSignature;
        uint32_t dCBWTag;
        uint32_t dCBWDataTransferLength;
        uint8_t bmCBWFlags;
        uint8_t bCBWLUN;
        uint8_t bCBWBLength;
        uint8_t CBWCB[16];
} __attribute__((packed)) usb_massstor_cbw_t;

typedef struct {
        uint32_t dCSWSignature;
        uint32_t dCSWTag;
        uint32_t dCSWDataResidue;
        uint8_t dCSWStatus;
} __attribute__((packed)) usb_massstor_csw_t;

static inline 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, 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);
}

#endif

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