| 1 | /* |
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| 2 | * Copyright (C) 2000 Jens Axboe <axboe@suse.de> |
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| 3 | * Copyright (C) 2001-2004 Peter Osterlund <petero2@telia.com> |
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| 4 | * |
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| 5 | * May be copied or modified under the terms of the GNU General Public |
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| 6 | * License. See linux/COPYING for more information. |
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| 7 | * |
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| 8 | * Packet writing layer for ATAPI and SCSI CD-R, CD-RW, DVD-R, and |
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| 9 | * DVD-RW devices. |
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| 10 | * |
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| 11 | */ |
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| 12 | #ifndef __PKTCDVD_H |
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| 13 | #define __PKTCDVD_H |
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| 14 | |
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| 15 | #include <linux/types.h> |
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| 16 | |
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| 17 | /* |
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| 18 | * 1 for normal debug messages, 2 is very verbose. 0 to turn it off. |
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| 19 | */ |
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| 20 | #define PACKET_DEBUG 1 |
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| 21 | |
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| 22 | #define MAX_WRITERS 8 |
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| 23 | |
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| 24 | #define PKT_RB_POOL_SIZE 512 |
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| 25 | |
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| 26 | /* |
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| 27 | * How long we should hold a non-full packet before starting data gathering. |
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| 28 | */ |
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| 29 | #define PACKET_WAIT_TIME (HZ * 5 / 1000) |
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| 30 | |
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| 31 | /* |
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| 32 | * use drive write caching -- we need deferred error handling to be |
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| 33 | * able to sucessfully recover with this option (drive will return good |
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| 34 | * status as soon as the cdb is validated). |
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| 35 | */ |
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| 36 | #if defined(CONFIG_CDROM_PKTCDVD_WCACHE) |
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| 37 | #define USE_WCACHING 1 |
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| 38 | #else |
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| 39 | #define USE_WCACHING 0 |
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| 40 | #endif |
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| 41 | |
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| 42 | /* |
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| 43 | * No user-servicable parts beyond this point -> |
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| 44 | */ |
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| 45 | |
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| 46 | /* |
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| 47 | * device types |
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| 48 | */ |
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| 49 | #define PACKET_CDR 1 |
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| 50 | #define PACKET_CDRW 2 |
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| 51 | #define PACKET_DVDR 3 |
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| 52 | #define PACKET_DVDRW 4 |
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| 53 | |
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| 54 | /* |
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| 55 | * flags |
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| 56 | */ |
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| 57 | #define PACKET_WRITABLE 1 /* pd is writable */ |
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| 58 | #define PACKET_NWA_VALID 2 /* next writable address valid */ |
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| 59 | #define PACKET_LRA_VALID 3 /* last recorded address valid */ |
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| 60 | #define PACKET_MERGE_SEGS 4 /* perform segment merging to keep */ |
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| 61 | /* underlying cdrom device happy */ |
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| 62 | |
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| 63 | /* |
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| 64 | * Disc status -- from READ_DISC_INFO |
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| 65 | */ |
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| 66 | #define PACKET_DISC_EMPTY 0 |
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| 67 | #define PACKET_DISC_INCOMPLETE 1 |
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| 68 | #define PACKET_DISC_COMPLETE 2 |
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| 69 | #define PACKET_DISC_OTHER 3 |
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| 70 | |
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| 71 | /* |
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| 72 | * write type, and corresponding data block type |
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| 73 | */ |
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| 74 | #define PACKET_MODE1 1 |
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| 75 | #define PACKET_MODE2 2 |
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| 76 | #define PACKET_BLOCK_MODE1 8 |
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| 77 | #define PACKET_BLOCK_MODE2 10 |
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| 78 | |
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| 79 | /* |
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| 80 | * Last session/border status |
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| 81 | */ |
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| 82 | #define PACKET_SESSION_EMPTY 0 |
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| 83 | #define PACKET_SESSION_INCOMPLETE 1 |
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| 84 | #define PACKET_SESSION_RESERVED 2 |
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| 85 | #define PACKET_SESSION_COMPLETE 3 |
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| 86 | |
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| 87 | #define PACKET_MCN "4a656e734178626f65323030300000" |
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| 88 | |
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| 89 | #undef PACKET_USE_LS |
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| 90 | |
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| 91 | #define PKT_CTRL_CMD_SETUP 0 |
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| 92 | #define PKT_CTRL_CMD_TEARDOWN 1 |
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| 93 | #define PKT_CTRL_CMD_STATUS 2 |
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| 94 | |
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| 95 | struct pkt_ctrl_command { |
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| 96 | __u32 command; /* in: Setup, teardown, status */ |
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| 97 | __u32 dev_index; /* in/out: Device index */ |
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| 98 | __u32 dev; /* in/out: Device nr for cdrw device */ |
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| 99 | __u32 pkt_dev; /* in/out: Device nr for packet device */ |
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| 100 | __u32 num_devices; /* out: Largest device index + 1 */ |
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| 101 | __u32 padding; /* Not used */ |
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| 102 | }; |
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| 103 | |
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| 104 | /* |
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| 105 | * packet ioctls |
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| 106 | */ |
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| 107 | #define PACKET_IOCTL_MAGIC ('X') |
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| 108 | #define PACKET_CTRL_CMD _IOWR(PACKET_IOCTL_MAGIC, 1, struct pkt_ctrl_command) |
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| 109 | |
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| 110 | #endif /* __PKTCDVD_H */ |
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