/*

 * libiec61883 - Linux IEEE 1394 streaming media library.

 * Copyright (C) 2004 Kristian Hogsberg, Dan Dennedy, and Dan Maas.

 * This code originally written by Andreas Micklei, then revised over the years

 * by Dan Dennedy.

 *

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

 * modify it under the terms of the GNU Lesser General Public

 * License as published by the Free Software Foundation; either

 * version 2.1 of the License, or (at your option) any later version.

 *

 * This library is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public

 * License along with this library; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

 */

#ifdef HAVE_CONFIG_H

#include <config.h>

#endif

#include "cooked.h"

#include <errno.h>

#include <time.h>

/*

 * constants for use with raw1394 ARM

 * The following probably should be in raw1394.h

 */

/* maximum number of retry attempts on raw1394 async transactions */

#define MAXTRIES 20

/* amount of delay in nanoseconds to wait before retrying raw1394 async transaction */

#define RETRY_DELAY 20000

int

iec61883_cooked_read(raw1394handle_t handle, nodeid_t node, nodeaddr_t addr,

                    size_t length, quadlet_t *buffer)

{

    int retval, i;

	struct timespec ts = {0, RETRY_DELAY};

    for (i = 0; i < MAXTRIES; i++) {

        retval = raw1394_read (handle, node, addr, length, buffer);

        if (retval < 0 && errno == EAGAIN)

            nanosleep(&ts, NULL);

        else

            return retval;

    }

    return -1;

}

int

iec61883_cooked_write(raw1394handle_t handle, nodeid_t node, nodeaddr_t addr,

                     size_t length, quadlet_t *data)

{

    int retval, i;

	struct timespec ts = {0, RETRY_DELAY};

    for (i = 0; i < MAXTRIES; i++) {

        retval = raw1394_write (handle, node, addr, length, data);

        if (retval < 0 && errno == EAGAIN)

            nanosleep(&ts, NULL);

        else

            return retval;

    }

    return -1;

}