pktcdvd.h

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/*
 * Copyright (C) 2000 Jens Axboe <[email protected]>
 * Copyright (C) 2001-2004 Peter Osterlund <[email protected]>
 *
 * 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 _UAPI__PKTCDVD_H
#define _UAPI__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 /* _UAPI__PKTCDVD_H */