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/* ucdrom.h. Uniform cdrom data structures for cdrom.c. -*- linux-c -*-
Copyright (c) 1996 David van Leeuwen.
*/
#ifndef LINUX_UCDROM_H
#define LINUX_UCDROM_H
#ifdef __KERNEL__
struct cdrom_device_info {
struct cdrom_device_ops *ops; /* link to device_ops */
struct cdrom_device_info *next; /* next device_info for this major */
void *handle; /* driver-dependent data */
/* specifications */
kdev_t dev; /* device number */
int mask; /* mask of capability: disables them */
int speed; /* maximum speed for reading data */
int capacity; /* number of discs in jukebox */
/* device-related storage */
int options : 30; /* options flags */
unsigned mc_flags : 2; /* media change buffer flags */
int use_count; /* number of times device opened */
};
struct cdrom_device_ops {
/* routines */
int (*open) (struct cdrom_device_info *, int);
void (*release) (struct cdrom_device_info *);
int (*drive_status) (struct cdrom_device_info *, int);
int (*disc_status) (struct cdrom_device_info *);
int (*media_changed) (struct cdrom_device_info *, int);
int (*tray_move) (struct cdrom_device_info *, int);
int (*lock_door) (struct cdrom_device_info *, int);
int (*select_speed) (struct cdrom_device_info *, int);
int (*select_disc) (struct cdrom_device_info *, int);
int (*get_last_session) (struct cdrom_device_info *,
struct cdrom_multisession *);
int (*get_mcn) (struct cdrom_device_info *,
struct cdrom_mcn *);
/* hard reset device */
int (*reset) (struct cdrom_device_info *);
/* play stuff */
int (*audio_ioctl) (struct cdrom_device_info *,unsigned int, void *);
/* dev-specific */
int (*dev_ioctl) (struct cdrom_device_info *,
unsigned int, unsigned long);
/* driver specifications */
const int capability; /* capability flags */
int n_minors; /* number of active minor devices */
};
#endif
/* capability flags */
#define CDC_CLOSE_TRAY 0x1 /* caddy systems _can't_ close */
#define CDC_OPEN_TRAY 0x2 /* but _can_ eject. */
#define CDC_LOCK 0x4 /* disable manual eject */
#define CDC_SELECT_SPEED 0x8 /* programmable speed */
#define CDC_SELECT_DISC 0x10 /* select disc from juke-box */
#define CDC_MULTI_SESSION 0x20 /* read sessions>1 */
#define CDC_MCN 0x40 /* Medium Catalog Number */
#define CDC_MEDIA_CHANGED 0x80 /* media changed */
#define CDC_PLAY_AUDIO 0x100 /* audio functions */
/* drive status possibilities */
#define CDS_NO_INFO 0 /* if not implemented */
#define CDS_NO_DISC 1
#define CDS_TRAY_OPEN 2
#define CDS_DRIVE_NOT_READY 3
#define CDS_DISC_OK 4
/* disc status possibilities, other than CDS_NO_DISC */
#define CDS_AUDIO 100
#define CDS_DATA_1 101
#define CDS_DATA_2 102
#define CDS_XA_2_1 103
#define CDS_XA_2_2 104
/* User-configurable behavior options */
#define CDO_AUTO_CLOSE 0x1 /* close tray on first open() */
#define CDO_AUTO_EJECT 0x2 /* open tray on last release() */
#define CDO_USE_FFLAGS 0x4 /* use O_NONBLOCK information on open */
#define CDO_LOCK 0x8 /* lock tray on open files */
#define CDO_CHECK_TYPE 0x10 /* check type on open for data */
/* Special codes for specifying changer slots. */
#define CDSL_NONE ((int) (~0U>>1)-1)
#define CDSL_CURRENT ((int) (~0U>>1))
/* Some more ioctls to control these options */
#define CDROM_SET_OPTIONS 0x5320
#define CDROM_CLEAR_OPTIONS 0x5321
#define CDROM_SELECT_SPEED 0x5322 /* head-speed */
#define CDROM_SELECT_DISC 0x5323 /* for juke-boxes */
#define CDROM_MEDIA_CHANGED 0x5325
#define CDROM_DRIVE_STATUS 0x5326 /* tray position, etc. */
#define CDROM_DISC_STATUS 0x5327 /* disc type etc. */
#define CDROM_CHANGER_NSLOTS 0x5328
/* Rename an old ioctl */
#define CDROM_GET_MCN CDROM_GET_UPC /* medium catalog number */
#ifdef __KERNEL__
/* the general file operations structure: */
extern struct file_operations cdrom_fops;
extern int register_cdrom(struct cdrom_device_info *cdi, char *name);
extern int unregister_cdrom(struct cdrom_device_info *cdi);
#endif
#endif /* LINUX_UCDROM_H */
/*
* Local variables:
* comment-column: 40
* End:
*/
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