/*
   *      sr.h by David Giller
   *      CD-ROM disk driver header file
   *      
   *      adapted from:
   *      sd.h Copyright (C) 1992 Drew Eckhardt 
   *      SCSI disk driver header file by
   *              Drew Eckhardt 
   *
   *      <drew@colorado.edu>
   *
   *       Modified by Eric Youngdale eric@andante.org to
   *       add scatter-gather, multiple outstanding request, and other
   *       enhancements.
   */
  
  #ifndef _SR_H
  #define _SR_H
  
  #include <linux/genhd.h>
  #include <linux/kref.h>
  
  #define MAX_RETRIES	3
  #define SR_TIMEOUT	(30 * HZ)
  
  struct scsi_device;
  
  /* The CDROM is fairly slow, so we need a little extra time */
  /* In fact, it is very slow if it has to spin up first */
  #define IOCTL_TIMEOUT 30*HZ
  
  
  typedef struct scsi_cd {
  	struct scsi_driver *driver;
  	unsigned capacity;	/* size in blocks                       */
  	struct scsi_device *device;
  	unsigned int vendor;	/* vendor code, see sr_vendor.c         */
  	unsigned long ms_offset;	/* for reading multisession-CD's        */
  	unsigned use:1;		/* is this device still supportable     */
  	unsigned xa_flag:1;	/* CD has XA sectors ? */
  	unsigned readcd_known:1;	/* drive supports READ_CD (0xbe) */
  	unsigned readcd_cdda:1;	/* reading audio data using READ_CD */
  	unsigned media_present:1;	/* media is present */
  
  	/* GET_EVENT spurious event handling, blk layer guarantees exclusion */
  	int tur_mismatch;		/* nr of get_event TUR mismatches */
  	bool tur_changed:1;		/* changed according to TUR */
  	bool get_event_changed:1;	/* changed according to GET_EVENT */
  	bool ignore_get_event:1;	/* GET_EVENT is unreliable, use TUR */
  
  	struct cdrom_device_info cdi;
  	/* We hold gendisk and scsi_device references on probe and use
  	 * the refs on this kref to decide when to release them */
  	struct kref kref;
  	struct gendisk *disk;
  } Scsi_CD;
  
  int sr_do_ioctl(Scsi_CD *, struct packet_command *);
  
  int sr_lock_door(struct cdrom_device_info *, int);
  int sr_tray_move(struct cdrom_device_info *, int);
  int sr_drive_status(struct cdrom_device_info *, int);
  int sr_disk_status(struct cdrom_device_info *);
  int sr_get_last_session(struct cdrom_device_info *, struct cdrom_multisession *);
  int sr_get_mcn(struct cdrom_device_info *, struct cdrom_mcn *);
  int sr_reset(struct cdrom_device_info *);
  int sr_select_speed(struct cdrom_device_info *cdi, int speed);
  int sr_audio_ioctl(struct cdrom_device_info *, unsigned int, void *);
  
  int sr_is_xa(Scsi_CD *);
  
  /* sr_vendor.c */
  void sr_vendor_init(Scsi_CD *);
  int sr_cd_check(struct cdrom_device_info *);
  int sr_set_blocklength(Scsi_CD *, int blocklength);
  
  #endif