cdrom.h

linux得一些常用命令,以及linux环境下的c编程

	__u8 information[4];
	__u8 add_sense_len;
	__u8 command_info[4];
	__u8 asc;
	__u8 ascq;
	__u8 fruc;
	__u8 sks[3];
	__u8 asb[46];
};

#ifdef __KERNEL__
#include <linux/devfs_fs_kernel.h>

struct cdrom_write_settings {
	unsigned char fpacket;		/* fixed/variable packets */
	unsigned long packet_size;	/* write out this number of packets */
	unsigned long nwa;		/* next writeable address */
	unsigned char writeable;	/* cdrom is writeable */
};

/* Uniform cdrom data structures for cdrom.c */
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 */
	devfs_handle_t de;		/* real driver should create this  */
	int number;			/* generic driver updates this  */
/* 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 */
    	char name[20];                  /* name of the device type */
/* per-device flags */
        __u8 sanyo_slot		: 2;	/* Sanyo 3 CD changer support */
        __u8 reserved		: 6;	/* not used yet */
	struct cdrom_write_settings write;
};

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 (*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 */
	/* handle uniform packets for scsi type devices (scsi,atapi) */
	int (*generic_packet) (struct cdrom_device_info *,
			       struct cdrom_generic_command *);
};

/* the general block_device operations structure: */
extern int cdrom_open(struct inode *, struct file *);
extern int cdrom_release(struct inode *, struct file *);
extern int cdrom_ioctl(struct inode *, struct file *, unsigned, unsigned long);
extern int cdrom_media_changed(kdev_t);

extern int register_cdrom(struct cdrom_device_info *cdi);
extern int unregister_cdrom(struct cdrom_device_info *cdi);

static inline void devfs_plain_cdrom(struct cdrom_device_info *cdi,
				struct block_device_operations *ops)
{
	char vname[23];

	sprintf (vname, "cdroms/cdrom%d", cdi->number);
	cdi->de = devfs_register (NULL, vname, DEVFS_FL_DEFAULT,
				    MAJOR (cdi->dev), MINOR (cdi->dev),
				    S_IFBLK | S_IRUGO | S_IWUGO,
				    ops, NULL);
}

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

extern void cdrom_count_tracks(struct cdrom_device_info *cdi,tracktype* tracks);
extern int cdrom_get_next_writable(kdev_t dev, long *next_writable);
extern int cdrom_get_last_written(kdev_t dev, long *last_written);
extern int cdrom_number_of_slots(struct cdrom_device_info *cdi);
extern int cdrom_select_disc(struct cdrom_device_info *cdi, int slot);
extern int cdrom_mode_select(struct cdrom_device_info *cdi,
			     struct cdrom_generic_command *cgc);
extern int cdrom_mode_sense(struct cdrom_device_info *cdi,
			    struct cdrom_generic_command *cgc,
			    int page_code, int page_control);
extern void init_cdrom_command(struct cdrom_generic_command *cgc,
			       void *buffer, int len, int type);
extern struct cdrom_device_info *cdrom_find_device(kdev_t dev);

typedef struct {
	__u16 disc_information_length;
#if defined(__BIG_ENDIAN_BITFIELD)
	__u8 reserved1			: 3;
        __u8 erasable			: 1;
        __u8 border_status		: 2;
        __u8 disc_status		: 2;
#elif defined(__LITTLE_ENDIAN_BITFIELD)
        __u8 disc_status		: 2;
        __u8 border_status		: 2;
        __u8 erasable			: 1;
	__u8 reserved1			: 3;
#else
#error "Please fix <asm/byteorder.h>"
#endif
	__u8 n_first_track;
	__u8 n_sessions_lsb;
	__u8 first_track_lsb;
	__u8 last_track_lsb;
#if defined(__BIG_ENDIAN_BITFIELD)
	__u8 did_v			: 1;
        __u8 dbc_v			: 1;
        __u8 uru			: 1;
        __u8 reserved2			: 5;
#elif defined(__LITTLE_ENDIAN_BITFIELD)
        __u8 reserved2			: 5;
        __u8 uru			: 1;
        __u8 dbc_v			: 1;
	__u8 did_v			: 1;
#endif
	__u8 disc_type;
	__u8 n_sessions_msb;
	__u8 first_track_msb;
	__u8 last_track_msb;
	__u32 disc_id;
	__u32 lead_in;
	__u32 lead_out;
	__u8 disc_bar_code[8];
	__u8 reserved3;
	__u8 n_opc;
} disc_information;

typedef struct {
	__u16 track_information_length;
	__u8 track_lsb;
	__u8 session_lsb;
	__u8 reserved1;
#if defined(__BIG_ENDIAN_BITFIELD)
	__u8 reserved2			: 2;
        __u8 damage			: 1;
        __u8 copy			: 1;
        __u8 track_mode			: 4;
	__u8 rt				: 1;
	__u8 blank			: 1;
	__u8 packet			: 1;
	__u8 fp				: 1;
	__u8 data_mode			: 4;
	__u8 reserved3			: 6;
	__u8 lra_v			: 1;
	__u8 nwa_v			: 1;
#elif defined(__LITTLE_ENDIAN_BITFIELD)
        __u8 track_mode			: 4;
        __u8 copy			: 1;
        __u8 damage			: 1;
	__u8 reserved2			: 2;
	__u8 data_mode			: 4;
	__u8 fp				: 1;
	__u8 packet			: 1;
	__u8 blank			: 1;
	__u8 rt				: 1;
	__u8 nwa_v			: 1;
	__u8 lra_v			: 1;
	__u8 reserved3			: 6;
#endif
	__u32 track_start;
	__u32 next_writable;
	__u32 free_blocks;
	__u32 fixed_packet_size;
	__u32 track_size;
	__u32 last_rec_address;
} track_information;

extern int cdrom_get_disc_info(kdev_t dev, disc_information *di);
extern int cdrom_get_track_info(kdev_t dev, __u16 track, __u8 type,
				track_information *ti);

/* 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;

struct mode_page_header {
	__u16 mode_data_length;
	__u8 medium_type;
	__u8 reserved1;
	__u8 reserved2;
	__u8 reserved3;
	__u16 desc_length;
};

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;
	__u32 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;

#endif  /* End of kernel only stuff */ 

#endif  /* _LINUX_CDROM_H */