scgcmd.h

读取/刻录光盘的程序

/* @(#)scgcmd.h	2.14 98/11/29 Copyright 1986 J. Schilling */
/*
 *	Definitions for the SCSI general driver 'scg'
 *
 *	Copyright (c) 1986 J. Schilling
 */
/*
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; see the file COPYING.  If not, write to
 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#ifndef	_SCGCMD_H
#define	_SCGCMD_H

#include <utypes.h>
#include <btorder.h>

#if	defined(_BIT_FIELDS_LTOH)	/* Intel byteorder */
#elif	defined(_BIT_FIELDS_HTOL)	/* Motorola byteorder */
#else 
/*
 * #error will not work for all compilers (e.g. sunos4)
 * The following line will abort compilation on all compilers
 * if none of the above is defines. And that's  what we want.
 */
error  One of _BIT_FIELDS_LTOH or _BIT_FIELDS_HTOL must be defined
#endif

/*
 * SCSI status completion block.
 */
#define	SCSI_EXTENDED_STATUS

#if	defined(_BIT_FIELDS_LTOH)	/* Intel byteorder */

struct	scsi_status {
	Ucbit	vu_00	: 1;	/* vendor unique */
	Ucbit	chk	: 1;	/* check condition: sense data available */
	Ucbit	cm	: 1;	/* condition met */
	Ucbit	busy	: 1;	/* device busy or reserved */
	Ucbit	is	: 1;	/* intermediate status sent */
	Ucbit	vu_05	: 1;	/* vendor unique */
#define st_scsi2	vu_05	/* SCSI-2 modifier bit */
	Ucbit	vu_06	: 1;	/* vendor unique */
	Ucbit	st_rsvd	: 1;	/* reserved */

#ifdef	SCSI_EXTENDED_STATUS
#define	ext_st1	st_rsvd		/* extended status (next byte valid) */
	/* byte 1 */
	Ucbit	ha_er	: 1;	/* host adapter detected error */
	Ucbit	reserved: 6;	/* reserved */
	Ucbit	ext_st2	: 1;	/* extended status (next byte valid) */
	/* byte 2 */
	u_char	byte2;		/* third byte */
#endif	/* SCSI_EXTENDED_STATUS */
};

#else	/* Motorola byteorder */

struct	scsi_status {
	Ucbit	st_rsvd	: 1;	/* reserved */
	Ucbit	vu_06	: 1;	/* vendor unique */
	Ucbit	vu_05	: 1;	/* vendor unique */
#define st_scsi2	vu_05	/* SCSI-2 modifier bit */
	Ucbit	is	: 1;	/* intermediate status sent */
	Ucbit	busy	: 1;	/* device busy or reserved */
	Ucbit	cm	: 1;	/* condition met */
	Ucbit	chk	: 1;	/* check condition: sense data available */
	Ucbit	vu_00	: 1;	/* vendor unique */
#ifdef	SCSI_EXTENDED_STATUS
#define	ext_st1	st_rsvd		/* extended status (next byte valid) */
	/* byte 1 */
	Ucbit	ext_st2	: 1;	/* extended status (next byte valid) */
	Ucbit	reserved: 6;	/* reserved */
	Ucbit	ha_er	: 1;	/* host adapter detected error */
	/* byte 2 */
	u_char	byte2;		/* third byte */
#endif	/* SCSI_EXTENDED_STATUS */
};
#endif

/*
 * OLD Standard (Non Extended) SCSI Sense. Used mainly by the
 * Adaptec ACB 4000 which is the only controller that
 * does not support the Extended sense format.
 */
#if	defined(_BIT_FIELDS_LTOH)	/* Intel byteorder */

struct	scsi_sense {		/* scsi sense for error classes 0-6 */
	Ucbit	code	: 7;	/* error class/code */
	Ucbit	adr_val	: 1;	/* sense data is valid */
#ifdef	comment
	Ucbit	high_addr:5;	/* high byte of block addr */
	Ucbit	rsvd	: 3;
#else
	u_char	high_addr;	/* high byte of block addr */
#endif
	u_char	mid_addr;	/* middle byte of block addr */
	u_char	low_addr;	/* low byte of block addr */
};

#else	/* Motorola byteorder */

struct	scsi_sense {		/* scsi sense for error classes 0-6 */
	Ucbit	adr_val	: 1;	/* sense data is valid */
	Ucbit	code	: 7;	/* error class/code */
#ifdef	comment
	Ucbit	rsvd	: 3;
	Ucbit	high_addr:5;	/* high byte of block addr */
#else
	u_char	high_addr;	/* high byte of block addr */
#endif
	u_char	mid_addr;	/* middle byte of block addr */
	u_char	low_addr;	/* low byte of block addr */
};
#endif

/*
 * SCSI extended sense parameter block.
 */
#ifdef	comment
#define SC_CLASS_EXTENDED_SENSE 0x7     /* indicates extended sense */
#endif

#if	defined(_BIT_FIELDS_LTOH)	/* Intel byteorder */

struct	scsi_ext_sense {	/* scsi extended sense for error class 7 */
	/* byte 0 */
	Ucbit	type	: 7;	/* fixed at 0x70 */
	Ucbit	adr_val	: 1;	/* sense data is valid */
	/* byte 1 */
	u_char	seg_num;	/* segment number, applies to copy cmd only */
	/* byte 2 */
	Ucbit	key	: 4;	/* sense key, see below */
	Ucbit		: 1;	/* reserved */
	Ucbit	ili	: 1;	/* incorrect length indicator */
	Ucbit	eom	: 1;	/* end of media */
	Ucbit	fil_mk	: 1;	/* file mark on device */
	/* bytes 3 through 7 */
	u_char	info_1;		/* information byte 1 */
	u_char	info_2;		/* information byte 2 */
	u_char	info_3;		/* information byte 3 */
	u_char	info_4;		/* information byte 4 */
	u_char	add_len;	/* number of additional bytes */
	/* bytes 8 through 13, CCS additions */
	u_char	optional_8;	/* CCS search and copy only */
	u_char	optional_9;	/* CCS search and copy only */
	u_char	optional_10;	/* CCS search and copy only */
	u_char	optional_11;	/* CCS search and copy only */
	u_char 	sense_code;	/* sense code */
	u_char	qual_code;	/* sense code qualifier */
	u_char	fru_code;	/* Field replacable unit code */
	Ucbit	bptr	: 3;	/* bit pointer for failure (if bpv) */
	Ucbit	bpv	: 1;	/* bit pointer is valid */
	Ucbit		: 2;
	Ucbit	cd	: 1;	/* pointers refer to command not data */
	Ucbit	sksv	: 1;	/* sense key specific valid */
	u_char	field_ptr[2];	/* field pointer for failure */
	u_char	add_info[2];	/* round up to 20 bytes */
};

#else	/* Motorola byteorder */

struct	scsi_ext_sense {	/* scsi extended sense for error class 7 */
	/* byte 0 */
	Ucbit	adr_val	: 1;	/* sense data is valid */
	Ucbit	type	: 7;	/* fixed at 0x70 */
	/* byte 1 */
	u_char	seg_num;	/* segment number, applies to copy cmd only */
	/* byte 2 */
	Ucbit	fil_mk	: 1;	/* file mark on device */
	Ucbit	eom	: 1;	/* end of media */
	Ucbit	ili	: 1;	/* incorrect length indicator */
	Ucbit		: 1;	/* reserved */
	Ucbit	key	: 4;	/* sense key, see below */
	/* bytes 3 through 7 */
	u_char	info_1;		/* information byte 1 */
	u_char	info_2;		/* information byte 2 */
	u_char	info_3;		/* information byte 3 */
	u_char	info_4;		/* information byte 4 */
	u_char	add_len;	/* number of additional bytes */
	/* bytes 8 through 13, CCS additions */
	u_char	optional_8;	/* CCS search and copy only */
	u_char	optional_9;	/* CCS search and copy only */
	u_char	optional_10;	/* CCS search and copy only */
	u_char	optional_11;	/* CCS search and copy only */
	u_char 	sense_code;	/* sense code */
	u_char	qual_code;	/* sense code qualifier */
	u_char	fru_code;	/* Field replacable unit code */
	Ucbit	sksv	: 1;	/* sense key specific valid */
	Ucbit	cd	: 1;	/* pointers refer to command not data */
	Ucbit		: 2;
	Ucbit	bpv	: 1;	/* bit pointer is valid */
	Ucbit	bptr	: 3;	/* bit pointer for failure (if bpv) */
	u_char	field_ptr[2];	/* field pointer for failure */
	u_char	add_info[2];	/* round up to 20 bytes */
};
#endif

/*
 * SCSI Operation codes. 
 */
#define SC_TEST_UNIT_READY	0x00
#define SC_REZERO_UNIT		0x01
#define SC_REQUEST_SENSE	0x03
#define SC_FORMAT		0x04
#define SC_FORMAT_TRACK		0x06
#define SC_REASSIGN_BLOCK	0x07		/* CCS only */
#define SC_SEEK			0x0b
#define SC_TRANSLATE		0x0f		/* ACB4000 only */
#define SC_INQUIRY		0x12		/* CCS only */
#define SC_MODE_SELECT		0x15
#define SC_RESERVE		0x16
#define SC_RELEASE		0x17
#define SC_MODE_SENSE		0x1a
#define SC_START		0x1b
#define SC_READ_DEFECT_LIST	0x37		/* CCS only, group 1 */
#define SC_READ_BUFFER          0x3c            /* CCS only, group 1 */
	/*
	 * Note, these two commands use identical command blocks for all
 	 * controllers except the Adaptec ACB 4000 which sets bit 1 of byte 1.
	 */
#define SC_READ			0x08
#define SC_WRITE		0x0a
#define SC_EREAD		0x28		/* 10 byte read */
#define SC_EWRITE		0x2a		/* 10 byte write */
#define SC_WRITE_VERIFY		0x2e            /* 10 byte write+verify */
#define SC_WRITE_FILE_MARK	0x10
#define SC_UNKNOWN		0xff		/* cmd list terminator */


/*
 * Messages that SCSI can send.
 */
#define SC_COMMAND_COMPLETE	0x00
#define SC_SYNCHRONOUS		0x01
#define SC_SAVE_DATA_PTR	0x02
#define SC_RESTORE_PTRS		0x03
#define SC_DISCONNECT		0x04
#define SC_ABORT		0x06
#define SC_MSG_REJECT		0x07
#define SC_NO_OP		0x08
#define SC_PARITY		0x09
#define SC_IDENTIFY		0x80
#define SC_DR_IDENTIFY		0xc0
#define SC_DEVICE_RESET		0x0c

/*
 * Standard SCSI control blocks.