disk_emu.h

linux下的usb开发

/*************************************************************
 * Philips Mass Storage disk emulation
 *
 * (c) 2002 Koninklijke Philips Electronics N.V., All rights reserved
 * 
 * This  source code and any compilation or derivative thereof is the
 * proprietary information of Koninklijke Philips Electronics N.V.
 * and is confidential in nature.
 * Under no circumstances is this software to be exposed to or placed
 * under an Open Source License of any type without the expressed
 * written permission of Koninklijke Philips Electronics N.V.
 *
 * File Name:	disk_emu.h
 *
 * History:	
 *
 *	Version	Date		Author		Comments
 * -------------------------------------------------
 * 	1.0		09/23/02	SYARRA		Initial Creation
 *
 * Note: use tab space 4
 *************************************************************/
#ifndef __DISK_EMU_H__
#define __DISK_EMU_H__

/* Disk Emulation file */
#ifdef CONFIG_1362_PXA250
#define		MSDISK_FILE						"/mnt/ramdisk/otgdisk"
#else
#define		MSDISK_FILE						"/dev/usb/otg/otgdisk"
#endif /* CONFIG_1362_PXA250 */

#ifdef _8MB_SIZE_
#define		LOGICAL_BLOCKS					0x00004000
#define		LINUX_UNIT_SIZE					16
#else
#define		LOGICAL_BLOCKS					0x00008000
#define		LINUX_UNIT_SIZE					32
#endif /* _8MB_SIZE_ */

#define		BLOCK_SIZE						0x00000200
#define		LAST_LBA						(LOGICAL_BLOCKS-1)

#define		INQUIRY_DATA_SIZE				0x24
#define		READ_CAPACITY_DATA_SIZE			0x08
#define		MODE_SENSE_DATA_SIZE			0x0C
#define		REQUEST_SENSE_DATA_SIZE			0x12

#define		CMD_TEST_UNIT_READY				0x00
#define		CMD_REQUEST_SENSE				0x03
#define		CMD_FORMAT_UNIT					0x04
#define		CMD_INQUIRY						0x12
#define		CMD_RESERVE						0x16
#define		CMD_RELEASE						0x17
#define		CMD_MODE_SENSE					0x1A
#define		CMD_START_STOP_UNIT				0x1B
#define		CMD_SEND_DIAGNOSTIC				0x1D
#define		CMD_MEDIUM_REMOVAL				0x1E
#define		CMD_READ_CAPACITY				0x25
#define		CMD_READ10						0x28
#define		CMD_WRITE10						0x2A
#define		CMD_VERIFY10					0x2F

/* 
 * Definitions for INQUIRY CMD fields 
 */
#define		INQUIRY_EVPD					0x01

/* 
 * Definitions of READ_CAPACITY fields 
 */
#define		READ_CAPACITY_RMI				0x01

/* 
 * Definition of RESERVE RELEASE fields 
 */
#define		RESERVE_EXTENT					0x01


/* REQUEST_SENSE */
/* 
 * Sense Key definitions 
 */
#define		SENSE_KEY_NO_SENSE				0x00
#define		SENSE_KEY_RECOVERED_ERROR		0x01
#define		SENSE_KEY_NOT_READY				0x02
#define		SENSE_KEY_MEDIUM_ERROR			0x03
#define		SENSE_KEY_HARDWARE_ERROR		0x04
#define		SENSE_KEY_ILLEGAL_REQUEST		0x05
#define		SENSE_KEY_UNIT_ATTENTION		0x06
#define		SENSE_KEY_DATA_PROTECT			0x07

/* 
 * Additional Sense Codes (ASC) 
 */
#define		ASC_ADDR_NOT_FOUND_4_ID_FLD		0x12
#define		ASC_ADDR_NOT_FOUND_4_DATA_FLD	0x13
#define		ASC_INV_FIELD_IN_CDB			0x24
#define		ASC_MEDIUM_CHANGE				0x28

/* 
 * Additional Sense Code Qualifiers (ASCQ) 
 */
#define		ASCQ_INV_FIELD_IN_CDB			0x00



#define		MS_DEV_FILE_NAME			"/dev/usb/otg/otgdev0"

/* OTG ms disk status */
typedef struct disk_emu_info {
	unsigned char	prevent;			/* Allow/prevent medium removal */
	unsigned char	sense_key;			/* Sense key */
	unsigned char	asc;				/* Additional sense code */
	unsigned char	ascq;				/* Additional sense code qualifier */
} disk_emu_info_t;

/*
 * Disk emulation states
 */
#define		DISK_EMU_IDLE			0x00
#define		DISK_EMU_CMD			0x01
#define		DISK_EMU_STATUS			0x02
#define		DISK_EMU_DATA_IN		0x03
#define		DISK_EMU_DATA_OUT		0x04

#endif /* __DISK_EMU_H__ */