xref: /openbmc/linux/include/uapi/linux/pktcdvd.h (revision 3a41db53)
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 _UAPI__PKTCDVD_H
14 #define _UAPI__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 
86 struct 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 /* _UAPI__PKTCDVD_H */
103