[linux-block.git] / include / linux / cdrom.h

/* SPDX-License-Identifier: GPL-2.0 */
/*
 * -- <linux/cdrom.h>
 * General header file for linux CD-ROM drivers 
 * Copyright (C) 1992         David Giller, rafetmad@oxy.edu
 *               1994, 1995   Eberhard Mönkeberg, emoenke@gwdg.de
 *               1996         David van Leeuwen, david@tm.tno.nl
 *               1997, 1998   Erik Andersen, andersee@debian.org
 *               1998-2002    Jens Axboe, axboe@suse.de
 */
#ifndef	_LINUX_CDROM_H
#define	_LINUX_CDROM_H

#include <linux/fs.h>		/* not really needed, later.. */
#include <linux/list.h>
#include <scsi/scsi_common.h>
#include <uapi/linux/cdrom.h>

struct packet_command
{
	unsigned char 		cmd[CDROM_PACKET_SIZE];
	unsigned char 		*buffer;
	unsigned int 		buflen;
	int			stat;
	struct scsi_sense_hdr	*sshdr;
	unsigned char		data_direction;
	int			quiet;
	int			timeout;
	void			*reserved[1];
};

/*
 * _OLD will use PIO transfer on atapi devices, _BPC_* will use DMA
 */
#define CDDA_OLD		0	/* old style */
#define CDDA_BPC_SINGLE		1	/* single frame block pc */
#define CDDA_BPC_FULL		2	/* multi frame block pc */

/* Uniform cdrom data structures for cdrom.c */
struct cdrom_device_info {
	const struct cdrom_device_ops *ops; /* link to device_ops */
	struct list_head list;		/* linked list of all device_info */
	struct gendisk *disk;		/* matching block layer disk */
	void *handle;		        /* driver-dependent data */
/* specifications */
	int mask;                       /* mask of capability: disables them */
	int speed;			/* maximum speed for reading data */
	int capacity;			/* number of discs in jukebox */
/* device-related storage */
	unsigned int options	: 30;	/* options flags */
	unsigned mc_flags	: 2;	/* media change buffer flags */
	unsigned int vfs_events;	/* cached events for vfs path */
	unsigned int ioctl_events;	/* cached events for ioctl path */
    	int use_count;                  /* number of times device opened */
    	char name[20];                  /* name of the device type */
/* per-device flags */
        __u8 sanyo_slot		: 2;	/* Sanyo 3 CD changer support */
        __u8 keeplocked		: 1;	/* CDROM_LOCKDOOR status */
        __u8 reserved		: 5;	/* not used yet */
	int cdda_method;		/* see flags */
	__u8 last_sense;
	__u8 media_written;		/* dirty flag, DVD+RW bookkeeping */
	unsigned short mmc3_profile;	/* current MMC3 profile */
	int for_data;
	int (*exit)(struct cdrom_device_info *);
	int mrw_mode_page;
	__s64 last_media_change_ms;
};

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);
	unsigned int (*check_events) (struct cdrom_device_info *cdi,
				      unsigned int clearing, int slot);
	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 (*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 *);

	/* handle uniform packets for scsi type devices (scsi,atapi) */
	int (*generic_packet) (struct cdrom_device_info *,
			       struct packet_command *);
	int (*read_cdda_bpc)(struct cdrom_device_info *cdi, void __user *ubuf,
			       u32 lba, u32 nframes, u8 *last_sense);
/* driver specifications */
	const int capability;   /* capability flags */
};

int cdrom_multisession(struct cdrom_device_info *cdi,
		struct cdrom_multisession *info);
int cdrom_read_tocentry(struct cdrom_device_info *cdi,
		struct cdrom_tocentry *entry);

/* the general block_device operations structure: */
extern int cdrom_open(struct cdrom_device_info *cdi, struct block_device *bdev,
			fmode_t mode);
extern void cdrom_release(struct cdrom_device_info *cdi, fmode_t mode);
extern int cdrom_ioctl(struct cdrom_device_info *cdi, struct block_device *bdev,
		       fmode_t mode, unsigned int cmd, unsigned long arg);
extern unsigned int cdrom_check_events(struct cdrom_device_info *cdi,
				       unsigned int clearing);

extern int register_cdrom(struct gendisk *disk, struct cdrom_device_info *cdi);
extern void unregister_cdrom(struct cdrom_device_info *cdi);

typedef struct {
    int data;
    int audio;
    int cdi;
    int xa;
    long error;
} tracktype;

extern int cdrom_get_last_written(struct cdrom_device_info *cdi, long *last_written);
extern int cdrom_number_of_slots(struct cdrom_device_info *cdi);
extern int cdrom_mode_select(struct cdrom_device_info *cdi,
			     struct packet_command *cgc);
extern int cdrom_mode_sense(struct cdrom_device_info *cdi,
			    struct packet_command *cgc,
			    int page_code, int page_control);
extern void init_cdrom_command(struct packet_command *cgc,
			       void *buffer, int len, int type);
extern int cdrom_dummy_generic_packet(struct cdrom_device_info *cdi,
				      struct packet_command *cgc);

/* The SCSI spec says there could be 256 slots. */
#define CDROM_MAX_SLOTS	256

struct cdrom_mechstat_header {
#if defined(__BIG_ENDIAN_BITFIELD)
	__u8 fault         : 1;
	__u8 changer_state : 2;
	__u8 curslot       : 5;
	__u8 mech_state    : 3;
	__u8 door_open     : 1;
	__u8 reserved1     : 4;
#elif defined(__LITTLE_ENDIAN_BITFIELD)
	__u8 curslot       : 5;
	__u8 changer_state : 2;
	__u8 fault         : 1;
	__u8 reserved1     : 4;
	__u8 door_open     : 1;
	__u8 mech_state    : 3;
#endif
	__u8     curlba[3];
	__u8     nslots;
	__u16 slot_tablelen;
};

struct cdrom_slot {
#if defined(__BIG_ENDIAN_BITFIELD)
	__u8 disc_present : 1;
	__u8 reserved1    : 6;
	__u8 change       : 1;
#elif defined(__LITTLE_ENDIAN_BITFIELD)
	__u8 change       : 1;
	__u8 reserved1    : 6;
	__u8 disc_present : 1;
#endif
	__u8 reserved2[3];
};

struct cdrom_changer_info {
	struct cdrom_mechstat_header hdr;
	struct cdrom_slot slots[CDROM_MAX_SLOTS];
};

typedef enum {
	mechtype_caddy = 0,
	mechtype_tray  = 1,
	mechtype_popup = 2,
	mechtype_individual_changer = 4,
	mechtype_cartridge_changer  = 5
} mechtype_t;

typedef struct {
#if defined(__BIG_ENDIAN_BITFIELD)
	__u8 ps			: 1;
	__u8 reserved1		: 1;
	__u8 page_code		: 6;
        __u8 page_length;
	__u8 reserved2		: 1;
	__u8 bufe		: 1;
	__u8 ls_v		: 1;
	__u8 test_write		: 1;
        __u8 write_type		: 4;
	__u8 multi_session	: 2; /* or border, DVD */
	__u8 fp			: 1;
	__u8 copy		: 1;
	__u8 track_mode		: 4;
	__u8 reserved3		: 4;
	__u8 data_block_type	: 4;
#elif defined(__LITTLE_ENDIAN_BITFIELD)
	__u8 page_code		: 6;
	__u8 reserved1		: 1;
	__u8 ps			: 1;
        __u8 page_length;
        __u8 write_type		: 4;
	__u8 test_write		: 1;
	__u8 ls_v		: 1;
	__u8 bufe		: 1;
	__u8 reserved2		: 1;
	__u8 track_mode		: 4;
	__u8 copy		: 1;
	__u8 fp			: 1;
	__u8 multi_session	: 2; /* or border, DVD */
	__u8 data_block_type	: 4;
	__u8 reserved3		: 4;
#endif
	__u8 link_size;
	__u8 reserved4;
#if defined(__BIG_ENDIAN_BITFIELD)
	__u8 reserved5		: 2;
	__u8 app_code		: 6;
#elif defined(__LITTLE_ENDIAN_BITFIELD)
	__u8 app_code		: 6;
	__u8 reserved5		: 2;
#endif
	__u8 session_format;
	__u8 reserved6;
	__be32 packet_size;
	__u16 audio_pause;
	__u8 mcn[16];
	__u8 isrc[16];
	__u8 subhdr0;
	__u8 subhdr1;
	__u8 subhdr2;
	__u8 subhdr3;
} __attribute__((packed)) write_param_page;

struct modesel_head
{
	__u8	reserved1;
	__u8	medium;
	__u8	reserved2;
	__u8	block_desc_length;
	__u8	density;
	__u8	number_of_blocks_hi;
	__u8	number_of_blocks_med;
	__u8	number_of_blocks_lo;
	__u8	reserved3;
	__u8	block_length_hi;
	__u8	block_length_med;
	__u8	block_length_lo;
};

typedef struct {
	__u16 report_key_length;
	__u8 reserved1;
	__u8 reserved2;
#if defined(__BIG_ENDIAN_BITFIELD)
	__u8 type_code			: 2;
	__u8 vra			: 3;
	__u8 ucca			: 3;
#elif defined(__LITTLE_ENDIAN_BITFIELD)
	__u8 ucca			: 3;
	__u8 vra			: 3;
	__u8 type_code			: 2;
#endif
	__u8 region_mask;
	__u8 rpc_scheme;
	__u8 reserved3;
} rpc_state_t;

struct event_header {
	__be16 data_len;
#if defined(__BIG_ENDIAN_BITFIELD)
	__u8 nea		: 1;
	__u8 reserved1		: 4;
	__u8 notification_class	: 3;
#elif defined(__LITTLE_ENDIAN_BITFIELD)
	__u8 notification_class	: 3;
	__u8 reserved1		: 4;
	__u8 nea		: 1;
#endif
	__u8 supp_event_class;
};

struct media_event_desc {
#if defined(__BIG_ENDIAN_BITFIELD)
	__u8 reserved1		: 4;
	__u8 media_event_code	: 4;
	__u8 reserved2		: 6;
	__u8 media_present	: 1;
	__u8 door_open		: 1;
#elif defined(__LITTLE_ENDIAN_BITFIELD)
	__u8 media_event_code	: 4;
	__u8 reserved1		: 4;
	__u8 door_open		: 1;
	__u8 media_present	: 1;
	__u8 reserved2		: 6;
#endif
	__u8 start_slot;
	__u8 end_slot;
};

extern int cdrom_get_media_event(struct cdrom_device_info *cdi, struct media_event_desc *med);

static inline void lba_to_msf(int lba, u8 *m, u8 *s, u8 *f)
{
	lba += CD_MSF_OFFSET;
	lba &= 0xffffff;  /* negative lbas use only 24 bits */
	*m = lba / (CD_SECS * CD_FRAMES);
	lba %= (CD_SECS * CD_FRAMES);
	*s = lba / CD_FRAMES;
	*f = lba % CD_FRAMES;
}

static inline int msf_to_lba(u8 m, u8 s, u8 f)
{
	return (((m * CD_SECS) + s) * CD_FRAMES + f) - CD_MSF_OFFSET;
}
#endif  /* _LINUX_CDROM_H */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
1da177e4 LT	2	/*
	3	* -- <linux/cdrom.h>
	4	* General header file for linux CD-ROM drivers
	5	* Copyright (C) 1992 David Giller, rafetmad@oxy.edu
96de0e25	6	* 1994, 1995 Eberhard Mönkeberg, emoenke@gwdg.de
1da177e4 LT	7	* 1996 David van Leeuwen, david@tm.tno.nl
	8	* 1997, 1998 Erik Andersen, andersee@debian.org
	9	* 1998-2002 Jens Axboe, axboe@suse.de
	10	*/
1da177e4 LT	11	#ifndef _LINUX_CDROM_H
	12	#define _LINUX_CDROM_H
	13
1da177e4	14	#include <linux/fs.h> /* not really needed, later.. */
7fd097d4	15	#include <linux/list.h>
e7d0748d	16	#include <scsi/scsi_common.h>
607ca46e	17	#include <uapi/linux/cdrom.h>
1da177e4 LT	18
	19	struct packet_command
	20	{
	21	unsigned char cmd[CDROM_PACKET_SIZE];
	22	unsigned char *buffer;
	23	unsigned int buflen;
	24	int stat;
e7d0748d	25	struct scsi_sense_hdr *sshdr;
1da177e4 LT	26	unsigned char data_direction;
	27	int quiet;
	28	int timeout;
	29	void *reserved[1];
	30	};
	31
	32	/*
	33	* _OLD will use PIO transfer on atapi devices, _BPC_* will use DMA
	34	*/
	35	#define CDDA_OLD 0 /* old style */
	36	#define CDDA_BPC_SINGLE 1 /* single frame block pc */
	37	#define CDDA_BPC_FULL 2 /* multi frame block pc */
	38
	39	/* Uniform cdrom data structures for cdrom.c */
	40	struct cdrom_device_info {
853fe1bf	41	const struct cdrom_device_ops ops; / link to device_ops */
7fd097d4	42	struct list_head list; /* linked list of all device_info */
1da177e4 LT	43	struct gendisk disk; / matching block layer disk */
	44	void handle; / driver-dependent data */
	45	/* specifications */
	46	int mask; /* mask of capability: disables them */
	47	int speed; /* maximum speed for reading data */
	48	int capacity; /* number of discs in jukebox */
	49	/* device-related storage */
0cba01db	50	unsigned int options : 30; /* options flags */
1da177e4	51	unsigned mc_flags : 2; /* media change buffer flags */
2d921729 TH	52	unsigned int vfs_events; /* cached events for vfs path */
2d921729 TH	53	unsigned int ioctl_events; /* cached events for ioctl path */
1da177e4 LT	54	int use_count; /* number of times device opened */
	55	char name[20]; /* name of the device type */
	56	/* per-device flags */
	57	__u8 sanyo_slot : 2; /* Sanyo 3 CD changer support */
cdccaa94 PB	58	__u8 keeplocked : 1; /* CDROM_LOCKDOOR status */
cdccaa94 PB	59	__u8 reserved : 5; /* not used yet */
1da177e4 LT	60	int cdda_method; /* see flags */
	61	__u8 last_sense;
	62	__u8 media_written; /* dirty flag, DVD+RW bookkeeping */
	63	unsigned short mmc3_profile; /* current MMC3 profile */
	64	int for_data;
	65	int (exit)(struct cdrom_device_info );
	66	int mrw_mode_page;
67f1e027	67	__s64 last_media_change_ms;
1da177e4 LT	68	};
	69
	70	struct cdrom_device_ops {
	71	/* routines */
	72	int (open) (struct cdrom_device_info , int);
	73	void (release) (struct cdrom_device_info );
	74	int (drive_status) (struct cdrom_device_info , int);
2d921729 TH	75	unsigned int (check_events) (struct cdrom_device_info cdi,
2d921729 TH	76	unsigned int clearing, int slot);
1da177e4 LT	77	int (tray_move) (struct cdrom_device_info , int);
	78	int (lock_door) (struct cdrom_device_info , int);
	79	int (select_speed) (struct cdrom_device_info , int);
1da177e4 LT	80	int (get_last_session) (struct cdrom_device_info ,
	81	struct cdrom_multisession *);
	82	int (get_mcn) (struct cdrom_device_info ,
	83	struct cdrom_mcn *);
	84	/* hard reset device */
	85	int (reset) (struct cdrom_device_info );
	86	/* play stuff */
	87	int (audio_ioctl) (struct cdrom_device_info ,unsigned int, void *);
6a2900b6	88
1da177e4 LT	89	/* handle uniform packets for scsi type devices (scsi,atapi) */
	90	int (generic_packet) (struct cdrom_device_info ,
	91	struct packet_command *);
ba51bdaf CH	92	int (read_cdda_bpc)(struct cdrom_device_info cdi, void __user *ubuf,
	93	u32 lba, u32 nframes, u8 *last_sense);
	94	/* driver specifications */
	95	const int capability; /* capability flags */
1da177e4 LT	96	};
1da177e4 LT	97
eaf8e3e4 CH	98	int cdrom_multisession(struct cdrom_device_info *cdi,
eaf8e3e4 CH	99	struct cdrom_multisession *info);
4c3cfcce CH	100	int cdrom_read_tocentry(struct cdrom_device_info *cdi,
	101	struct cdrom_tocentry *entry);
	102
1da177e4	103	/* the general block_device operations structure: */
bbc1cc97 AV	104	extern int cdrom_open(struct cdrom_device_info cdi, struct block_device bdev,
	105	fmode_t mode);
	106	extern void cdrom_release(struct cdrom_device_info *cdi, fmode_t mode);
	107	extern int cdrom_ioctl(struct cdrom_device_info cdi, struct block_device bdev,
	108	fmode_t mode, unsigned int cmd, unsigned long arg);
2d921729 TH	109	extern unsigned int cdrom_check_events(struct cdrom_device_info *cdi,
2d921729 TH	110	unsigned int clearing);
1da177e4	111
a711d91c	112	extern int register_cdrom(struct gendisk disk, struct cdrom_device_info cdi);
0a0c4114	113	extern void unregister_cdrom(struct cdrom_device_info *cdi);
1da177e4 LT	114
	115	typedef struct {
	116	int data;
	117	int audio;
	118	int cdi;
	119	int xa;
	120	long error;
	121	} tracktype;
	122
	123	extern int cdrom_get_last_written(struct cdrom_device_info cdi, long last_written);
	124	extern int cdrom_number_of_slots(struct cdrom_device_info *cdi);
	125	extern int cdrom_mode_select(struct cdrom_device_info *cdi,
	126	struct packet_command *cgc);
	127	extern int cdrom_mode_sense(struct cdrom_device_info *cdi,
	128	struct packet_command *cgc,
	129	int page_code, int page_control);
	130	extern void init_cdrom_command(struct packet_command *cgc,
	131	void *buffer, int len, int type);
853fe1bf KC	132	extern int cdrom_dummy_generic_packet(struct cdrom_device_info *cdi,
853fe1bf KC	133	struct packet_command *cgc);
1da177e4 LT	134
	135	/* The SCSI spec says there could be 256 slots. */
	136	#define CDROM_MAX_SLOTS 256
	137
	138	struct cdrom_mechstat_header {
	139	#if defined(__BIG_ENDIAN_BITFIELD)
	140	__u8 fault : 1;
	141	__u8 changer_state : 2;
	142	__u8 curslot : 5;
	143	__u8 mech_state : 3;
	144	__u8 door_open : 1;
	145	__u8 reserved1 : 4;
	146	#elif defined(__LITTLE_ENDIAN_BITFIELD)
	147	__u8 curslot : 5;
	148	__u8 changer_state : 2;
	149	__u8 fault : 1;
	150	__u8 reserved1 : 4;
	151	__u8 door_open : 1;
	152	__u8 mech_state : 3;
	153	#endif
	154	__u8 curlba[3];
	155	__u8 nslots;
	156	__u16 slot_tablelen;
	157	};
	158
	159	struct cdrom_slot {
	160	#if defined(__BIG_ENDIAN_BITFIELD)
	161	__u8 disc_present : 1;
	162	__u8 reserved1 : 6;
	163	__u8 change : 1;
	164	#elif defined(__LITTLE_ENDIAN_BITFIELD)
	165	__u8 change : 1;
	166	__u8 reserved1 : 6;
	167	__u8 disc_present : 1;
	168	#endif
	169	__u8 reserved2[3];
	170	};
	171
	172	struct cdrom_changer_info {
	173	struct cdrom_mechstat_header hdr;
	174	struct cdrom_slot slots[CDROM_MAX_SLOTS];
	175	};
	176
	177	typedef enum {
	178	mechtype_caddy = 0,
	179	mechtype_tray = 1,
	180	mechtype_popup = 2,
	181	mechtype_individual_changer = 4,
	182	mechtype_cartridge_changer = 5
	183	} mechtype_t;
	184
	185	typedef struct {
	186	#if defined(__BIG_ENDIAN_BITFIELD)
	187	__u8 ps : 1;
	188	__u8 reserved1 : 1;
	189	__u8 page_code : 6;
	190	__u8 page_length;
	191	__u8 reserved2 : 1;
	192	__u8 bufe : 1;
	193	__u8 ls_v : 1;
	194	__u8 test_write : 1;
	195	__u8 write_type : 4;
	196	__u8 multi_session : 2; /* or border, DVD */
	197	__u8 fp : 1;
198	__u8 copy : 1;
199	__u8 track_mode : 4;
200	__u8 reserved3 : 4;
201	__u8 data_block_type : 4;
202	#elif defined(__LITTLE_ENDIAN_BITFIELD)
203	__u8 page_code : 6;
204	__u8 reserved1 : 1;
205	__u8 ps : 1;
206	__u8 page_length;
207	__u8 write_type : 4;
208	__u8 test_write : 1;
209	__u8 ls_v : 1;
210	__u8 bufe : 1;
211	__u8 reserved2 : 1;
212	__u8 track_mode : 4;
213	__u8 copy : 1;
214	__u8 fp : 1;
215	__u8 multi_session : 2; /* or border, DVD */
216	__u8 data_block_type : 4;
217	__u8 reserved3 : 4;
218	#endif
219	__u8 link_size;
220	__u8 reserved4;
221	#if defined(__BIG_ENDIAN_BITFIELD)
222	__u8 reserved5 : 2;
223	__u8 app_code : 6;
224	#elif defined(__LITTLE_ENDIAN_BITFIELD)
225	__u8 app_code : 6;
226	__u8 reserved5 : 2;
227	#endif
228	__u8 session_format;
229	__u8 reserved6;
56052d52	230	__be32 packet_size;
1da177e4 LT	231	__u16 audio_pause;
	232	__u8 mcn[16];
	233	__u8 isrc[16];
	234	__u8 subhdr0;
	235	__u8 subhdr1;
	236	__u8 subhdr2;
	237	__u8 subhdr3;
	238	} __attribute__((packed)) write_param_page;
	239
	240	struct modesel_head
	241	{
	242	__u8 reserved1;
	243	__u8 medium;
	244	__u8 reserved2;
	245	__u8 block_desc_length;
	246	__u8 density;
	247	__u8 number_of_blocks_hi;
	248	__u8 number_of_blocks_med;
	249	__u8 number_of_blocks_lo;
	250	__u8 reserved3;
	251	__u8 block_length_hi;
	252	__u8 block_length_med;
	253	__u8 block_length_lo;
	254	};
	255
	256	typedef struct {
	257	__u16 report_key_length;
	258	__u8 reserved1;
	259	__u8 reserved2;
	260	#if defined(__BIG_ENDIAN_BITFIELD)
	261	__u8 type_code : 2;
	262	__u8 vra : 3;
	263	__u8 ucca : 3;
	264	#elif defined(__LITTLE_ENDIAN_BITFIELD)
	265	__u8 ucca : 3;
	266	__u8 vra : 3;
	267	__u8 type_code : 2;
	268	#endif
	269	__u8 region_mask;
	270	__u8 rpc_scheme;
	271	__u8 reserved3;
	272	} rpc_state_t;
	273
	274	struct event_header {
56052d52	275	__be16 data_len;
1da177e4 LT	276	#if defined(__BIG_ENDIAN_BITFIELD)
	277	__u8 nea : 1;
	278	__u8 reserved1 : 4;
	279	__u8 notification_class : 3;
	280	#elif defined(__LITTLE_ENDIAN_BITFIELD)
	281	__u8 notification_class : 3;
	282	__u8 reserved1 : 4;
	283	__u8 nea : 1;
	284	#endif
	285	__u8 supp_event_class;
	286	};
	287
	288	struct media_event_desc {
	289	#if defined(__BIG_ENDIAN_BITFIELD)
	290	__u8 reserved1 : 4;
	291	__u8 media_event_code : 4;
	292	__u8 reserved2 : 6;
	293	__u8 media_present : 1;
	294	__u8 door_open : 1;
	295	#elif defined(__LITTLE_ENDIAN_BITFIELD)
	296	__u8 media_event_code : 4;
	297	__u8 reserved1 : 4;
	298	__u8 door_open : 1;
	299	__u8 media_present : 1;
	300	__u8 reserved2 : 6;
	301	#endif
	302	__u8 start_slot;
	303	__u8 end_slot;
	304	};
	305
	306	extern int cdrom_get_media_event(struct cdrom_device_info cdi, struct media_event_desc med);
	307
a1bb9457 BZ	308	static inline void lba_to_msf(int lba, u8 m, u8 s, u8 *f)
	309	{
	310	lba += CD_MSF_OFFSET;
	311	lba &= 0xffffff; /* negative lbas use only 24 bits */
	312	m = lba / (CD_SECS CD_FRAMES);
	313	lba %= (CD_SECS * CD_FRAMES);
	314	*s = lba / CD_FRAMES;
	315	*f = lba % CD_FRAMES;
	316	}
	317
	318	static inline int msf_to_lba(u8 m, u8 s, u8 f)
	319	{
	320	return (((m * CD_SECS) + s) * CD_FRAMES + f) - CD_MSF_OFFSET;
	321	}
1da177e4	322	#endif /* _LINUX_CDROM_H */