linux-headers (unknown)
1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2 /*
3 * Copyright (C) 2000 Jens Axboe <axboe@suse.de>
4 * Copyright (C) 2001-2004 Peter Osterlund <petero2@telia.com>
5 *
6 * May be copied or modified under the terms of the GNU General Public
7 * License. See linux/COPYING for more information.
8 *
9 * Packet writing layer for ATAPI and SCSI CD-R, CD-RW, DVD-R, and
10 * DVD-RW devices.
11 *
12 */
13 #ifndef __PKTCDVD_H
14 #define __PKTCDVD_H
15
16 #include <linux/types.h>
17
18 /*
19 * 1 for normal debug messages, 2 is very verbose. 0 to turn it off.
20 */
21 #define PACKET_DEBUG 1
22
23 #define MAX_WRITERS 8
24
25 #define PKT_RB_POOL_SIZE 512
26
27 /*
28 * How long we should hold a non-full packet before starting data gathering.
29 */
30 #define PACKET_WAIT_TIME (HZ * 5 / 1000)
31
32 /*
33 * No user-servicable parts beyond this point ->
34 */
35
36 /*
37 * device types
38 */
39 #define PACKET_CDR 1
40 #define PACKET_CDRW 2
41 #define PACKET_DVDR 3
42 #define PACKET_DVDRW 4
43
44 /*
45 * flags
46 */
47 #define PACKET_WRITABLE 1 /* pd is writable */
48 #define PACKET_NWA_VALID 2 /* next writable address valid */
49 #define PACKET_LRA_VALID 3 /* last recorded address valid */
50 #define PACKET_MERGE_SEGS 4 /* perform segment merging to keep */
51 /* underlying cdrom device happy */
52
53 /*
54 * Disc status -- from READ_DISC_INFO
55 */
56 #define PACKET_DISC_EMPTY 0
57 #define PACKET_DISC_INCOMPLETE 1
58 #define PACKET_DISC_COMPLETE 2
59 #define PACKET_DISC_OTHER 3
60
61 /*
62 * write type, and corresponding data block type
63 */
64 #define PACKET_MODE1 1
65 #define PACKET_MODE2 2
66 #define PACKET_BLOCK_MODE1 8
67 #define PACKET_BLOCK_MODE2 10
68
69 /*
70 * Last session/border status
71 */
72 #define PACKET_SESSION_EMPTY 0
73 #define PACKET_SESSION_INCOMPLETE 1
74 #define PACKET_SESSION_RESERVED 2
75 #define PACKET_SESSION_COMPLETE 3
76
77 #define PACKET_MCN "4a656e734178626f65323030300000"
78
79 #undef PACKET_USE_LS
80
81 #define PKT_CTRL_CMD_SETUP 0
82 #define PKT_CTRL_CMD_TEARDOWN 1
83 #define PKT_CTRL_CMD_STATUS 2
84
85 struct pkt_ctrl_command {
86 __u32 command; /* in: Setup, teardown, status */
87 __u32 dev_index; /* in/out: Device index */
88 __u32 dev; /* in/out: Device nr for cdrw device */
89 __u32 pkt_dev; /* in/out: Device nr for packet device */
90 __u32 num_devices; /* out: Largest device index + 1 */
91 __u32 padding; /* Not used */
92 };
93
94 /*
95 * packet ioctls
96 */
97 #define PACKET_IOCTL_MAGIC ('X')
98 #define PACKET_CTRL_CMD _IOWR(PACKET_IOCTL_MAGIC, 1, struct pkt_ctrl_command)
99
100
101 #endif /* __PKTCDVD_H */
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