nand.h

powerpc的u-boot ppcuboot-2

/*
 *  ppcboot/include/linux/mtd/nand.h
 *
 *  Copyright (c) 2000 David Woodhouse <[e-mail]>
 *                     Steven J. Hill <[e-mail]>
 *
 * $Id: nand.h,v 1.8 2000/10/30 17:16:17 sjhill Exp $
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 *  Info:
 *   Contains standard defines and IDs for NAND flash devices
 *
 *  Changelog:
 *   01-31-2000 DMW     Created
 *   09-18-2000 SJH     Moved structure out of the Disk-On-Chip drivers
 *			so it can be used by other NAND flash device
 *			drivers. I also changed the copyright since none
 *			of the original contents of this file are specific
 *			to DoC devices. David can whack me with a baseball
 *			bat later if I did something naughty.
 *   10-11-2000 SJH     Added private NAND flash structure for driver
 *   10-24-2000 SJH     Added prototype for 'nand_scan' function
 */
#ifndef __LINUX_MTD_NAND_H
#define __LINUX_MTD_NAND_H

/*
 * Standard NAND flash commands
 */
#define NAND_CMD_READ0		0
#define NAND_CMD_READ1		1
#define NAND_CMD_PAGEPROG	0x10
#define NAND_CMD_READOOB	0x50
#define NAND_CMD_ERASE1		0x60
#define NAND_CMD_STATUS		0x70
#define NAND_CMD_SEQIN		0x80
#define NAND_CMD_READID		0x90
#define NAND_CMD_ERASE2		0xd0
#define NAND_CMD_RESET		0xff

/*
 * NAND Flash Manufacturer ID Codes
 */
#define NAND_MFR_TOSHIBA	0x98
#define NAND_MFR_SAMSUNG	0xec

/*
 * NAND Flash Device ID Structure
 *
 * Structure overview:
 *
 *  name - Complete name of device
 *
 *  manufacture_id - manufacturer ID code of device.
 *
 *  model_id - model ID code of device.
 *
 *  chipshift - total number of address bits for the device which
 *              is used to calculate address offsets and the total
 *              number of bytes the device is capable of.
 *
 *  page256 - denotes if flash device has 256 byte pages or not.
 *
 *  pageadrlen - number of bytes minus one needed to hold the
 *               complete address into the flash array. Keep in
 *               mind that when a read or write is done to a
 *               specific address, the address is input serially
 *               8 bits at a time. This structure member is used
 *               by the read/write routines as a loop index for
 *               shifting the address out 8 bits at a time.
 *
 *  erasesize - size of an erase block in the flash device.
 */
struct nand_flash_dev {
	char * name;
	int manufacture_id;
	int model_id;
	int chipshift;
	char page256;
	char pageadrlen;
	unsigned long erasesize;
};

#endif /* __LINUX_MTD_NAND_H */