ide-cd.h

基于组件方式开发操作系统的OSKIT源代码

#ifndef _IDE_CD_H
#define _IDE_CD_H
/*
 *  linux/drivers/block/ide_modes.h
 *
 *  Copyright (C) 1996  Erik Andersen
 *  Copyright (C) 1998, 1999 Jens Axboe
 */

#include <asm/byteorder.h>

/* Turn this on to have the driver print out the meanings of the
   ATAPI error codes.  This will use up additional kernel-space
   memory, though. */

#ifndef VERBOSE_IDE_CD_ERRORS
#define VERBOSE_IDE_CD_ERRORS 1
#endif


/* Turning this on will remove code to work around various nonstandard
   ATAPI implementations.  If you know your drive follows the standard,
   this will give you a slightly smaller kernel. */

#ifndef STANDARD_ATAPI
#define STANDARD_ATAPI 0
#endif


/* Turning this on will disable the door-locking functionality.
   This is apparently needed for supermount. */

#ifndef NO_DOOR_LOCKING
#define NO_DOOR_LOCKING 0
#endif


/* Size of buffer to allocate, in blocks, for audio reads. */

#ifndef CDROM_NBLOCKS_BUFFER
#define CDROM_NBLOCKS_BUFFER 8
#endif


/************************************************************************/

#define SECTOR_SIZE 512
#define SECTOR_BITS 9
#define SECTORS_PER_FRAME (CD_FRAMESIZE / SECTOR_SIZE)

#define MIN(a,b) ((a) < (b) ? (a) : (b))

/* special command codes for strategy routine. */
#define PACKET_COMMAND        4315
#define REQUEST_SENSE_COMMAND 4316
#define RESET_DRIVE_COMMAND   4317

/*
 * For controlling drive spindown time.
 */
#define CDROMGETSPINDOWN        0x531d
#define CDROMSETSPINDOWN        0x531e
 

/* Some ATAPI command opcodes (just like SCSI).
   (Some other cdrom-specific codes are in cdrom.h.) */
#define TEST_UNIT_READY         0x00
#define REQUEST_SENSE           0x03
#define INQUIRY                 0x12
#define START_STOP              0x1b
#define ALLOW_MEDIUM_REMOVAL    0x1e
#define READ_CAPACITY           0x25
#define READ_10                 0x28
#define SEEK			0x2b
#define READ_HEADER             0x44
#define STOP_PLAY_SCAN		0x4e
#define MODE_SELECT_10          0x55
#define MODE_SENSE_10           0x5a
#define LOAD_UNLOAD             0xa6
#define READ_12                 0xa8
#define READ_CD_MSF             0xb9
#define SCAN			0xba
#define SET_CD_SPEED            0xbb
#define PLAY_CD                 0xbc
#define MECHANISM_STATUS        0xbd
#define READ_CD                 0xbe

/* DVD Opcodes */
#define DVD_GET_PERFORMANCE	0xac


/* Page codes for mode sense/set */

#define PAGE_READERR            0x01
#define PAGE_CDROM              0x0d
#define PAGE_AUDIO              0x0e
#define PAGE_CAPABILITIES       0x2a
#define PAGE_ALL                0x3f


/* ATAPI sense keys (from table 140 of ATAPI 2.6) */

#define NO_SENSE                0x00
#define RECOVERED_ERROR         0x01
#define NOT_READY               0x02
#define MEDIUM_ERROR            0x03
#define HARDWARE_ERROR          0x04
#define ILLEGAL_REQUEST         0x05
#define UNIT_ATTENTION          0x06
#define DATA_PROTECT            0x07
#define ABORTED_COMMAND         0x0b
#define MISCOMPARE              0x0e

/* We want some additional flags for CDROM drives.
   To save space in the ide_drive_t struct, use some fields which
   doesn't make sense for CDROMs -- `bios_cyl' and `bios_head'. */

/* Configuration flags.  These describe the capabilities of the drive.
   They generally do not change after initialization, unless we learn
   more about the drive from stuff failing. */
struct ide_cd_config_flags {
	__u8 drq_interrupt    : 1; /* Device sends an interrupt when ready
				      for a packet command. */
	__u8 no_doorlock      : 1; /* Drive cannot lock the door. */
	__u8 no_eject         : 1; /* Drive cannot eject the disc. */
	__u8 nec260           : 1; /* Drive is a pre-1.2 NEC 260 drive. */
	__u8 playmsf_as_bcd   : 1; /* PLAYMSF command takes BCD args. */
	__u8 tocaddr_as_bcd   : 1; /* TOC addresses are in BCD. */
	__u8 toctracks_as_bcd : 1; /* TOC track numbers are in BCD. */
	__u8 subchan_as_bcd   : 1; /* Subchannel info is in BCD. */
	__u8 is_changer       : 1; /* Drive is a changer. */
	__u8 cd_r             : 1; /* Drive can write to CD-R media . */
	__u8 cd_rw            : 1; /* Drive can write to CD-R/W media . */
	__u8 dvd              : 1; /* Drive is a DVD-ROM */
	__u8 dvd_r            : 1; /* Drive can write DVD-RAM */
	__u8 dvd_rw           : 1; /* Drive can write DVD-R/W */
	__u8 test_write       : 1; /* Drive can fake writes */
	__u8 supp_disc_present: 1; /* Changer can report exact contents
				      of slots. */
	__u8 limit_nframes    : 1; /* Drive does not provide data in
				      multiples of SECTOR_SIZE when more
				      than one interrupt is needed. */
	__u8 seeking          : 1; /* Seeking in progress */
	__u8 reserved         : 6;
	byte max_speed; 	   /* Max speed of the drive */
};
#define CDROM_CONFIG_FLAGS(drive) (&(((struct cdrom_info *)(drive->driver_data))->config_flags))

 
/* State flags.  These give information about the current state of the
   drive, and will change during normal operation. */
struct ide_cd_state_flags {
	__u8 media_changed : 1; /* Driver has noticed a media change. */
	__u8 toc_valid     : 1; /* Saved TOC information is current. */
	__u8 door_locked   : 1; /* We think that the drive door is locked. */
	__u8 sanyo_slot    : 2; /* Sanyo 3 CD changer support */
	__u8 reserved      : 3;
	byte current_speed;	/* Current speed of the drive */
};
#define CDROM_STATE_FLAGS(drive) (&(((struct cdrom_info *)(drive->driver_data))->state_flags))


struct atapi_request_sense {
#if defined(__BIG_ENDIAN_BITFIELD)
	unsigned char valid      : 1;
	unsigned char error_code : 7;
#elif defined(__LITTLE_ENDIAN_BITFIELD)
	unsigned char error_code : 7;
	unsigned char valid      : 1;
#else
#error "Please fix <asm/byteorder.h>"
#endif
	byte reserved1;
#if defined(__BIG_ENDIAN_BITFIELD)
	unsigned char reserved3  : 2;
	unsigned char ili        : 1;
	unsigned char reserved2  : 1;
	unsigned char sense_key  : 4;
#elif defined(__LITTLE_ENDIAN_BITFIELD)
	unsigned char sense_key  : 4;
	unsigned char reserved2  : 1;
	unsigned char ili        : 1;
	unsigned char reserved3  : 2;
#else
#error "Please fix <asm/byteorder.h>"
#endif
	byte info[4];
	byte sense_len;
	byte command_info[4];
	byte asc;
	byte ascq;
	byte fru;
	byte sense_key_specific[3];
};

struct packet_command {
	char *buffer;
	int buflen;
	int stat;
	struct atapi_request_sense *sense_data;
	unsigned char c[12];
};

/* Structure of a MSF cdrom address. */
struct atapi_msf {
	byte reserved;
	byte minute;
	byte second;
	byte frame;
};

/* Space to hold the disk TOC. */
#define MAX_TRACKS 99
struct atapi_toc_header {
	unsigned short toc_length;
	byte first_track;
	byte last_track;
};

struct atapi_toc_entry {
	byte reserved1;
#if defined(__BIG_ENDIAN_BITFIELD)
	__u8 adr     : 4;
	__u8 control : 4;
#elif defined(__LITTLE_ENDIAN_BITFIELD)
	__u8 control : 4;
	__u8 adr     : 4;
#else
#error "Please fix <asm/byteorder.h>"
#endif
	byte track;
	byte reserved2;
	union {
		unsigned lba;
		struct atapi_msf msf;
	} addr;
};

struct atapi_toc {
	int    last_session_lba;
	int    xa_flag;
	unsigned capacity;
	struct atapi_toc_header hdr;
	struct atapi_toc_entry  ent[MAX_TRACKS+1];
	  /* One extra for the leadout. */
};


/* This structure is annoyingly close to, but not identical with,
   the cdrom_subchnl structure from cdrom.h. */
struct atapi_cdrom_subchnl {
 	u_char  acdsc_reserved;
 	u_char  acdsc_audiostatus;
 	u_short acdsc_length;
	u_char  acdsc_format;

#if defined(__BIG_ENDIAN_BITFIELD)
	u_char  acdsc_ctrl:     4;
	u_char  acdsc_adr:      4;
#elif defined(__LITTLE_ENDIAN_BITFIELD)
	u_char  acdsc_adr:	4;
	u_char  acdsc_ctrl:	4;
#else
#error "Please fix <asm/byteorder.h>"
#endif
	u_char  acdsc_trk;
	u_char  acdsc_ind;
	union {
		struct atapi_msf msf;
		int	lba;
	} acdsc_absaddr;
	union {
		struct atapi_msf msf;
		int	lba;
	} acdsc_reladdr;
};


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


struct atapi_capabilities_page {
#if defined(__BIG_ENDIAN_BITFIELD)
	__u8 parameters_saveable : 1;
	__u8 reserved1           : 1;
	__u8 page_code           : 6;
#elif defined(__LITTLE_ENDIAN_BITFIELD)
	__u8 page_code           : 6;
	__u8 reserved1           : 1;
	__u8 parameters_saveable : 1;
#else
#error "Please fix <asm/byteorder.h>"
#endif

	byte     page_length;

#if defined(__BIG_ENDIAN_BITFIELD)
	__u8 reserved2           : 2;
	/* Drive supports reading of DVD-RAM discs */
	__u8 dvd_ram_read        : 1;
	/* Drive supports reading of DVD-R discs */
	__u8 dvd_r_read          : 1;
	/* Drive supports reading of DVD-ROM discs */
	__u8 dvd_rom             : 1;
	/* Drive supports reading CD-R discs with addressing method 2 */
	__u8 method2             : 1; /* reserved in 1.2 */
	/* Drive can read from CD-R/W (CD-E) discs (orange book, part III) */
	__u8 cd_rw_read		 : 1; /* reserved in 1.2 */
	/* Drive supports read from CD-R discs (orange book, part II) */
	__u8 cd_r_read           : 1; /* reserved in 1.2 */
#elif defined(__LITTLE_ENDIAN_BITFIELD)
	/* Drive supports read from CD-R discs (orange book, part II) */
	__u8 cd_r_read           : 1; /* reserved in 1.2 */
	/* Drive can read from CD-R/W (CD-E) discs (orange book, part III) */
	__u8 cd_rw_read          : 1; /* reserved in 1.2 */
	/* Drive supports reading CD-R discs with addressing method 2 */
	__u8 method2             : 1;
	/* Drive supports reading of DVD-ROM discs */
	__u8 dvd_rom             : 1;
	/* Drive supports reading of DVD-R discs */
	__u8 dvd_r_read          : 1;
	/* Drive supports reading of DVD-RAM discs */
	__u8 dvd_ram_read        : 1;
	__u8 reserved2		 : 2;
#else
#error "Please fix <asm/byteorder.h>"
#endif

#if defined(__BIG_ENDIAN_BITFIELD)
	__u8 reserved3           : 2;
	/* Drive can write DVD-RAM discs */
	__u8 dvd_ram_write       : 1;
	/* Drive can write DVD-R discs */
	__u8 dvd_r_write         : 1;
	__u8 reserved3a          : 1;
	/* Drive can fake writes */
	__u8 test_write          : 1;
	/* Drive can write to CD-R/W (CD-E) discs (orange book, part III) */
	__u8 cd_rw_write	 : 1; /* reserved in 1.2 */
	/* Drive supports write to CD-R discs (orange book, part II) */
	__u8 cd_r_write          : 1; /* reserved in 1.2 */
#elif defined(__LITTLE_ENDIAN_BITFIELD)
	/* Drive can write to CD-R discs (orange book, part II) */
	__u8 cd_r_write          : 1; /* reserved in 1.2 */
	/* Drive can write to CD-R/W (CD-E) discs (orange book, part III) */
	__u8 cd_rw_write	 : 1; /* reserved in 1.2 */
	/* Drive can fake writes */
	__u8 test_write          : 1;
	__u8 reserved3a          : 1;
	/* Drive can write DVD-R discs */
	__u8 dvd_r_write         : 1;
	/* Drive can write DVD-RAM discs */
	__u8 dvd_ram_write       : 1;
	__u8 reserved3           : 2;
#else
#error "Please fix <asm/byteorder.h>"
#endif

#if defined(__BIG_ENDIAN_BITFIELD)
	__u8 reserved4           : 1;
	/* Drive can read multisession discs. */
	__u8 multisession        : 1;
	/* Drive can read mode 2, form 2 data. */
	__u8 mode2_form2         : 1;
	/* Drive can read mode 2, form 1 (XA) data. */
	__u8 mode2_form1         : 1;
	/* Drive supports digital output on port 2. */
	__u8 digport2            : 1;
	/* Drive supports digital output on port 1. */
	__u8 digport1            : 1;
	/* Drive can deliver a composite audio/video data stream. */
	__u8 composite           : 1;
	/* Drive supports audio play operations. */
	__u8 audio_play          : 1;
#elif defined(__LITTLE_ENDIAN_BITFIELD)
	/* Drive supports audio play operations. */
	__u8 audio_play          : 1;
	/* Drive can deliver a composite audio/video data stream. */
	__u8 composite           : 1;
	/* Drive supports digital output on port 1. */
	__u8 digport1            : 1;
	/* Drive supports digital output on port 2. */
	__u8 digport2            : 1;
	/* Drive can read mode 2, form 1 (XA) data. */
	__u8 mode2_form1         : 1;
	/* Drive can read mode 2, form 2 data. */
	__u8 mode2_form2         : 1;
	/* Drive can read multisession discs. */
	__u8 multisession        : 1;
	__u8 reserved4           : 1;