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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 sucessfully 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 */
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