LXR linux/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
  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 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
  58int sr_do_ioctl(Scsi_CD *, struct packet_command *);
  59
  60int sr_lock_door(struct cdrom_device_info *, int);
  61int sr_tray_move(struct cdrom_device_info *, int);
  62int sr_drive_status(struct cdrom_device_info *, int);
  63int sr_disk_status(struct cdrom_device_info *);
  64int sr_get_last_session(struct cdrom_device_info *, struct cdrom_multisession *);
  65int sr_get_mcn(struct cdrom_device_info *, struct cdrom_mcn *);
  66int sr_reset(struct cdrom_device_info *);
  67int sr_select_speed(struct cdrom_device_info *cdi, int speed);
  68int sr_audio_ioctl(struct cdrom_device_info *, unsigned int, void *);
  69
  70int sr_is_xa(Scsi_CD *);
  71
  72/* sr_vendor.c */
  73void sr_vendor_init(Scsi_CD *);
  74int sr_cd_check(struct cdrom_device_info *);
  75int sr_set_blocklength(Scsi_CD *, int blocklength);
  76
  77#endif
  78