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