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/*

 * Copyright (C) 2000 Jens Axboe <axboe@suse.de>

 * Copyright (C) 2001-2004 Peter Osterlund <petero2@telia.com>

 *

 * May be copied or modified under the terms of the GNU General Public

 * License.  See linux/COPYING for more information.

 *

 * Packet writing layer for ATAPI and SCSI CD-R, CD-RW, DVD-R, and

 * DVD-RW devices.

 *

 */

#ifndef __PKTCDVD_H

#define __PKTCDVD_H

#include <linux/types.h>

/*

 * 1 for normal debug messages, 2 is very verbose. 0 to turn it off.

 */

#define PACKET_DEBUG            1

#define MAX_WRITERS             8

#define PKT_RB_POOL_SIZE        512

/*

 * How long we should hold a non-full packet before starting data gathering.

 */

#define PACKET_WAIT_TIME        (HZ * 5 / 1000)

/*

 * use drive write caching -- we need deferred error handling to be

 * able to successfully recover with this option (drive will return good

 * status as soon as the cdb is validated).

 */

#if defined(CONFIG_CDROM_PKTCDVD_WCACHE)

#define USE_WCACHING            1

#else

#define USE_WCACHING            0

#endif

/*

 * No user-servicable parts beyond this point ->

 */

/*

 * device types

 */

#define PACKET_CDR              1

#define PACKET_CDRW             2

#define PACKET_DVDR             3

#define PACKET_DVDRW            4

/*

 * flags

 */

#define PACKET_WRITABLE         1       /* pd is writable */

#define PACKET_NWA_VALID        2       /* next writable address valid */

#define PACKET_LRA_VALID        3       /* last recorded address valid */

#define PACKET_MERGE_SEGS       4       /* perform segment merging to keep */

                                        /* underlying cdrom device happy */

/*

 * Disc status -- from READ_DISC_INFO

 */

#define PACKET_DISC_EMPTY       0

#define PACKET_DISC_INCOMPLETE  1

#define PACKET_DISC_COMPLETE    2

#define PACKET_DISC_OTHER       3

/*

 * write type, and corresponding data block type

 */

#define PACKET_MODE1            1

#define PACKET_MODE2            2

#define PACKET_BLOCK_MODE1      8

#define PACKET_BLOCK_MODE2      10

/*

 * Last session/border status

 */

#define PACKET_SESSION_EMPTY            0

#define PACKET_SESSION_INCOMPLETE       1

#define PACKET_SESSION_RESERVED         2

#define PACKET_SESSION_COMPLETE         3

#define PACKET_MCN                      "4a656e734178626f65323030300000"

#undef PACKET_USE_LS

#define PKT_CTRL_CMD_SETUP      0

#define PKT_CTRL_CMD_TEARDOWN   1

#define PKT_CTRL_CMD_STATUS     2

struct pkt_ctrl_command {

        __u32 command;                          /* in: Setup, teardown, status */

        __u32 dev_index;                        /* in/out: Device index */

        __u32 dev;                              /* in/out: Device nr for cdrw device */

        __u32 pkt_dev;                          /* in/out: Device nr for packet device */

        __u32 num_devices;                      /* out: Largest device index + 1 */

        __u32 padding;                          /* Not used */

};

/*

 * packet ioctls

 */

#define PACKET_IOCTL_MAGIC      ('X')

#define PACKET_CTRL_CMD         _IOWR(PACKET_IOCTL_MAGIC, 1, struct pkt_ctrl_command)

#endif /* __PKTCDVD_H */