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
26 struct 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
33 typedef 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 use:1; /* is this device still supportable */
40 unsigned xa_flag:1; /* CD has XA sectors ? */
41 unsigned readcd_known:1; /* drive supports READ_CD (0xbe) */
42 unsigned readcd_cdda:1; /* reading audio data using READ_CD */
43 unsigned previous_state:1; /* media has changed */
44 struct cdrom_device_info cdi;
45 /* We hold gendisk and scsi_device references on probe and use
46 * the refs on this kref to decide when to release them */
47 struct kref kref;
48 struct gendisk *disk;
49 } Scsi_CD;
50
51 int sr_do_ioctl(Scsi_CD *, struct packet_command *);
52
53 int sr_lock_door(struct cdrom_device_info *, int);
54 int sr_tray_move(struct cdrom_device_info *, int);
55 int sr_drive_status(struct cdrom_device_info *, int);
56 int sr_disk_status(struct cdrom_device_info *);
57 int sr_get_last_session(struct cdrom_device_info *, struct cdrom_multisession *);
58 int sr_get_mcn(struct cdrom_device_info *, struct cdrom_mcn *);
59 int sr_reset(struct cdrom_device_info *);
60 int sr_select_speed(struct cdrom_device_info *cdi, int speed);
61 int sr_audio_ioctl(struct cdrom_device_info *, unsigned int, void *);
62
63 int sr_is_xa(Scsi_CD *);
64 int sr_test_unit_ready(struct scsi_device *sdev, struct scsi_sense_hdr *sshdr);
65
66 /* sr_vendor.c */
67 void sr_vendor_init(Scsi_CD *);
68 int sr_cd_check(struct cdrom_device_info *);
69 int sr_set_blocklength(Scsi_CD *, int blocklength);
70
71 #endif
72
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