1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * sr.h by David Giller
4 * CD-ROM disk driver header file
5 *
6 * adapted from:
7 * sd.h Copyright (C) 1992 Drew Eckhardt
8 * SCSI disk driver header file by
9 * Drew Eckhardt
10 *
11 * <drew@colorado.edu>
12 *
13 * Modified by Eric Youngdale eric@andante.org to
14 * add scatter-gather, multiple outstanding request, and other
15 * enhancements.
16 */
17
18#ifndef _SR_H
19#define _SR_H
20
21#include <linux/genhd.h>
22#include <linux/kref.h>
23
24#define MAX_RETRIES 3
25#define SR_TIMEOUT (30 * HZ)
26
27struct scsi_device;
28
29/* The CDROM is fairly slow, so we need a little extra time */
30/* In fact, it is very slow if it has to spin up first */
31#define IOCTL_TIMEOUT 30*HZ
32
33
34typedef struct scsi_cd {
35 struct scsi_driver *driver;
36 unsigned capacity; /* size in blocks */
37 struct scsi_device *device;
38 unsigned int vendor; /* vendor code, see sr_vendor.c */
39 unsigned long ms_offset; /* for reading multisession-CD's */
40 unsigned writeable : 1;
41 unsigned use:1; /* is this device still supportable */
42 unsigned xa_flag:1; /* CD has XA sectors ? */
43 unsigned readcd_known:1; /* drive supports READ_CD (0xbe) */
44 unsigned readcd_cdda:1; /* reading audio data using READ_CD */
45 unsigned media_present:1; /* media is present */
46
47 /* GET_EVENT spurious event handling, blk layer guarantees exclusion */
48 int tur_mismatch; /* nr of get_event TUR mismatches */
49 bool tur_changed:1; /* changed according to TUR */
50 bool get_event_changed:1; /* changed according to GET_EVENT */
51 bool ignore_get_event:1; /* GET_EVENT is unreliable, use TUR */
52
53 struct cdrom_device_info cdi;
54 /* We hold gendisk and scsi_device references on probe and use
55 * the refs on this kref to decide when to release them */
56 struct kref kref;
57 struct gendisk *disk;
58} Scsi_CD;
59
60#define sr_printk(prefix, cd, fmt, a...) \
61 sdev_prefix_printk(prefix, (cd)->device, (cd)->cdi.name, fmt, ##a)
62
63int sr_do_ioctl(Scsi_CD *, struct packet_command *);
64
65int sr_lock_door(struct cdrom_device_info *, int);
66int sr_tray_move(struct cdrom_device_info *, int);
67int sr_drive_status(struct cdrom_device_info *, int);
68int sr_disk_status(struct cdrom_device_info *);
69int sr_get_last_session(struct cdrom_device_info *, struct cdrom_multisession *);
70int sr_get_mcn(struct cdrom_device_info *, struct cdrom_mcn *);
71int sr_reset(struct cdrom_device_info *);
72int sr_select_speed(struct cdrom_device_info *cdi, int speed);
73int sr_audio_ioctl(struct cdrom_device_info *, unsigned int, void *);
74
75int sr_is_xa(Scsi_CD *);
76
77/* sr_vendor.c */
78void sr_vendor_init(Scsi_CD *);
79int sr_cd_check(struct cdrom_device_info *);
80int sr_set_blocklength(Scsi_CD *, int blocklength);
81
82#endif
83