/* 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;}; 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 (*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 *); /* driver specifications */	const int capability;   /* capability flags */	/* handle uniform packets for scsi type devices (scsi,atapi) */	int (*generic_packet) (struct cdrom_device_info *,			       struct packet_command *);}; /* 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 cdrom_media_changed(struct cdrom_device_info *); extern int register_cdrom(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 */