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 * UNUSED:
20 * 1 for normal debug messages, 2 is very verbose. 0 to turn it off.
21 */
22#define PACKET_DEBUG 1
23
24#define MAX_WRITERS 8
25
26#define PKT_RB_POOL_SIZE 512
27
28/*
29 * How long we should hold a non-full packet before starting data gathering.
30 */
31#define PACKET_WAIT_TIME (HZ * 5 / 1000)
32
33/*
34 * No user-servicable parts beyond this point ->
35 */
36
37/*
38 * device types
39 */
40#define PACKET_CDR 1
41#define PACKET_CDRW 2
42#define PACKET_DVDR 3
43#define PACKET_DVDRW 4
44
45/*
46 * flags
47 */
48#define PACKET_WRITABLE 1 /* pd is writable */
49#define PACKET_NWA_VALID 2 /* next writable address valid */
50#define PACKET_LRA_VALID 3 /* last recorded address valid */
51#define PACKET_MERGE_SEGS 4 /* perform segment merging to keep */
52 /* underlying cdrom device happy */
53
54/*
55 * Disc status -- from READ_DISC_INFO
56 */
57#define PACKET_DISC_EMPTY 0
58#define PACKET_DISC_INCOMPLETE 1
59#define PACKET_DISC_COMPLETE 2
60#define PACKET_DISC_OTHER 3
61
62/*
63 * write type, and corresponding data block type
64 */
65#define PACKET_MODE1 1
66#define PACKET_MODE2 2
67#define PACKET_BLOCK_MODE1 8
68#define PACKET_BLOCK_MODE2 10
69
70/*
71 * Last session/border status
72 */
73#define PACKET_SESSION_EMPTY 0
74#define PACKET_SESSION_INCOMPLETE 1
75#define PACKET_SESSION_RESERVED 2
76#define PACKET_SESSION_COMPLETE 3
77
78#define PACKET_MCN "4a656e734178626f65323030300000"
79
80#undef PACKET_USE_LS
81
82#define PKT_CTRL_CMD_SETUP 0
83#define PKT_CTRL_CMD_TEARDOWN 1
84#define PKT_CTRL_CMD_STATUS 2
85
86struct pkt_ctrl_command {
87 __u32 command; /* in: Setup, teardown, status */
88 __u32 dev_index; /* in/out: Device index */
89 __u32 dev; /* in/out: Device nr for cdrw device */
90 __u32 pkt_dev; /* in/out: Device nr for packet device */
91 __u32 num_devices; /* out: Largest device index + 1 */
92 __u32 padding; /* Not used */
93};
94
95/*
96 * packet ioctls
97 */
98#define PACKET_IOCTL_MAGIC ('X')
99#define PACKET_CTRL_CMD _IOWR(PACKET_IOCTL_MAGIC, 1, struct pkt_ctrl_command)
100
101
102#endif /* __PKTCDVD_H */