/* *  linux/include/linux/mtd/nand.h * *  Copyright (c) 2000 David Woodhouse <dwmw2@mvhi.com> *                     Steven J. Hill <sjhill@cotw.com> * * $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#include <linux/config.h>#include <linux/sched.h>/* * Searches for a NAND device */extern int nand_scan (struct mtd_info *mtd);/* * 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/* * Enumeration for NAND flash chip state */typedef enum {	FL_READY,	FL_READING,	FL_WRITING,	FL_ERASING,	FL_SYNCING} nand_state_t;/* * NAND Private Flash Chip Data * * Structure overview: * *  IO_ADDR - address to access the 8 I/O lines to the flash device * *  CTRL_ADDR - address where ALE, CLE and CE control bits are accessed * *  CLE - location in control word for Command Latch Enable bit * *  ALE - location in control word for Address Latch Enable bit * *  NCE - location in control word for nChip Enable bit * *  chip_lock - spinlock used to protect access to this structure * *  wq - wait queue to sleep on if a NAND operation is in progress * *  state - give the current state of the NAND device * *  page_shift - number of address bits in a page (column address bits) * *  data_buf - data buffer passed to/from MTD user modules * *  ecc_code_buf - used only for holding calculated or read ECCs for *                 a page read or written when ECC is in use * *  reserved - padding to make structure fall on word boundary if *             when ECC is in use */struct nand_chip {	unsigned long IO_ADDR;	unsigned long CTRL_ADDR;	unsigned int CLE;	unsigned int ALE;	unsigned int NCE;	spinlock_t chip_lock;	wait_queue_head_t wq;	nand_state_t state;	int page_shift;	u_char *data_buf;#ifdef CONFIG_MTD_NAND_ECC	u_char ecc_code_buf[6];	u_char reserved[2];#endif};/* * 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 */