at91_nand.h

at91rm9200的256M bytes Nand flash的Ads12测试代码

/*
 * AT91RM9200 specific NAND (SmartMedia) defines
 *
 * (c) 2003 Rick Bronson
 *
 * 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 of the License, 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; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#ifndef __AT91_NAND_H
#define __AT91_NAND_H
#include "types.h"
#define AT91_SMART_MEDIA_ALE (1 << 22)  /* our ALE is AD22 */
#define AT91_SMART_MEDIA_CLE (1 << 21)  /* our CLE is AD21 */

/*
 * NAND Flash Manufacturer ID Codes
 */
#define NAND_MFR_TOSHIBA	0x98
#define NAND_MFR_SAMSUNG	0xec
#define NAND_MFR_FUJITSU	0x04
#define NAND_MFR_NATIONAL	0x8f

/*
 * NAND Flash Device ID Structure
 *
 * Structure overview:
 *
 *  name - Identify the device type
 *
 *  id -  device ID code
 *
 *  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 id;
	int chipshift;
	unsigned long erasesize;
	char page256;
};

/*
 * NAND Flash Manufacturer ID Structure
 *
 *  name - Manufacturer name
 *
 *  id - manufacturer ID code of device.
*/
struct nand_manufacturers {
	int id;
	char * name;
};

/*
* Constants for oob configuration
*/
#define NAND_BADBLOCK_POS		5

#define NAND_NONE_OOB			0
#define NAND_JFFS2_OOB			1
#define NAND_YAFFS_OOB			2

#define NAND_NOOB_ECCPOS0		0
#define NAND_NOOB_ECCPOS1		1
#define NAND_NOOB_ECCPOS2		2
#define NAND_NOOB_ECCPOS3		3
#define NAND_NOOB_ECCPOS4		6
#define NAND_NOOB_ECCPOS5		7

#define NAND_JFFS2_OOB_ECCPOS0		0
#define NAND_JFFS2_OOB_ECCPOS1		1
#define NAND_JFFS2_OOB_ECCPOS2		2
#define NAND_JFFS2_OOB_ECCPOS3		3
#define NAND_JFFS2_OOB_ECCPOS4		6
#define NAND_JFFS2_OOB_ECCPOS5		7

#define NAND_YAFFS_OOB_ECCPOS0		8
#define NAND_YAFFS_OOB_ECCPOS1		9
#define NAND_YAFFS_OOB_ECCPOS2		10
#define NAND_YAFFS_OOB_ECCPOS3		13
#define NAND_YAFFS_OOB_ECCPOS4		14
#define NAND_YAFFS_OOB_ECCPOS5		15

#define NAND_JFFS2_OOB8_FSDAPOS		6
#define NAND_JFFS2_OOB16_FSDAPOS	8
#define NAND_JFFS2_OOB8_FSDALEN		2
#define NAND_JFFS2_OOB16_FSDALEN	8


#endif