drivers/scsi/sr.h

0001 /* SPDX-License-Identifier: GPL-2.0 */
0002 /*
0003  *      sr.h by David Giller
0004  *      CD-ROM disk driver header file
0005  *
0006  *      adapted from:
0007  *      sd.h Copyright (C) 1992 Drew Eckhardt
0008  *      SCSI disk driver header file by
0009  *              Drew Eckhardt
0010  *
0011  *      <drew@colorado.edu>
0012  *
0013  *       Modified by Eric Youngdale eric@andante.org to
0014  *       add scatter-gather, multiple outstanding request, and other
0015  *       enhancements.
0016  */
0017
0018 #ifndef _SR_H
0019 #define _SR_H
0020
0021 #include <linux/mutex.h>
0022
0023 #define MAX_RETRIES 3
0024 #define SR_TIMEOUT  (30 * HZ)
0025
0026 struct scsi_device;
0027
0028 /* The CDROM is fairly slow, so we need a little extra time */
0029 /* In fact, it is very slow if it has to spin up first */
0030 #define IOCTL_TIMEOUT 30*HZ
0031
0032
0033 typedef struct scsi_cd {
0034     unsigned capacity;  /* size in blocks                       */
0035     struct scsi_device *device;
0036     unsigned int vendor;    /* vendor code, see sr_vendor.c         */
0037     unsigned long ms_offset;    /* for reading multisession-CD's        */
0038     unsigned writeable : 1;
0039     unsigned use:1;     /* is this device still supportable     */
0040     unsigned xa_flag:1; /* CD has XA sectors ? */
0041     unsigned readcd_known:1;    /* drive supports READ_CD (0xbe) */
0042     unsigned readcd_cdda:1; /* reading audio data using READ_CD */
0043     unsigned media_present:1;   /* media is present */
0044
0045     /* GET_EVENT spurious event handling, blk layer guarantees exclusion */
0046     int tur_mismatch;       /* nr of get_event TUR mismatches */
0047     bool tur_changed:1;     /* changed according to TUR */
0048     bool get_event_changed:1;   /* changed according to GET_EVENT */
0049     bool ignore_get_event:1;    /* GET_EVENT is unreliable, use TUR */
0050
0051     struct cdrom_device_info cdi;
0052     struct mutex lock;
0053     struct gendisk *disk;
0054 } Scsi_CD;
0055
0056 #define sr_printk(prefix, cd, fmt, a...) \
0057     sdev_prefix_printk(prefix, (cd)->device, (cd)->cdi.name, fmt, ##a)
0058
0059 int sr_do_ioctl(Scsi_CD *, struct packet_command *);
0060
0061 int sr_lock_door(struct cdrom_device_info *, int);
0062 int sr_tray_move(struct cdrom_device_info *, int);
0063 int sr_drive_status(struct cdrom_device_info *, int);
0064 int sr_disk_status(struct cdrom_device_info *);
0065 int sr_get_last_session(struct cdrom_device_info *, struct cdrom_multisession *);
0066 int sr_get_mcn(struct cdrom_device_info *, struct cdrom_mcn *);
0067 int sr_reset(struct cdrom_device_info *);
0068 int sr_select_speed(struct cdrom_device_info *cdi, int speed);
0069 int sr_audio_ioctl(struct cdrom_device_info *, unsigned int, void *);
0070
0071 int sr_is_xa(Scsi_CD *);
0072
0073 /* sr_vendor.c */
0074 void sr_vendor_init(Scsi_CD *);
0075 int sr_cd_check(struct cdrom_device_info *);
0076 int sr_set_blocklength(Scsi_CD *, int blocklength);
0077
0078 #endif