drivers/scsi/sr.h

   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 media_present:1;       /* media is present */
  44
  45         /* GET_EVENT spurious event handling, blk layer guarantees exclusion */
  46         int tur_mismatch;               /* nr of get_event TUR mismatches */
  47         bool tur_changed:1;             /* changed according to TUR */
  48         bool get_event_changed:1;       /* changed according to GET_EVENT */
  49         bool ignore_get_event:1;        /* GET_EVENT is unreliable, use TUR */
  50
  51         struct cdrom_device_info cdi;
  52         /* We hold gendisk and scsi_device references on probe and use
  53          * the refs on this kref to decide when to release them */
  54         struct kref kref;
  55         struct gendisk *disk;
  56 } Scsi_CD;
  57
  58 int sr_do_ioctl(Scsi_CD *, struct packet_command *);
  59
  60 int sr_lock_door(struct cdrom_device_info *, int);
  61 int sr_tray_move(struct cdrom_device_info *, int);
  62 int sr_drive_status(struct cdrom_device_info *, int);
  63 int sr_disk_status(struct cdrom_device_info *);
  64 int sr_get_last_session(struct cdrom_device_info *, struct cdrom_multisession *);
  65 int sr_get_mcn(struct cdrom_device_info *, struct cdrom_mcn *);
  66 int sr_reset(struct cdrom_device_info *);
  67 int sr_select_speed(struct cdrom_device_info *cdi, int speed);
  68 int sr_audio_ioctl(struct cdrom_device_info *, unsigned int, void *);
  69
  70 int sr_is_xa(Scsi_CD *);
  71
  72 /* sr_vendor.c */
  73 void sr_vendor_init(Scsi_CD *);
  74 int sr_cd_check(struct cdrom_device_info *);
  75 int sr_set_blocklength(Scsi_CD *, int blocklength);
  76
  77 #endif