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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 */