/* *  linux/include/linux/mtd/onenand.h * *  Copyright (C) 2005-2007 Samsung Electronics *  Kyungmin Park <kyungmin.park@samsung.com> * * 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. */#ifndef __LINUX_MTD_ONENAND_H#define __LINUX_MTD_ONENAND_H#include <linux/mtd/onenand_regs.h>/* Note: The header order is impoertant */#include <onenand_uboot.h>#include <linux/mtd/compat.h>#include <linux/mtd/bbm.h>#define MAX_BUFFERRAM		2#define MAX_ONENAND_PAGESIZE	(2048 + 64)/* Scan and identify a OneNAND device */extern int onenand_scan (struct mtd_info *mtd, int max_chips);/* Free resources held by the OneNAND device */extern void onenand_release (struct mtd_info *mtd);/** * struct onenand_bufferram - OneNAND BufferRAM Data * @param blockpage	block & page address in BufferRAM */struct onenand_bufferram {	int blockpage;};/** * struct onenand_chip - OneNAND Private Flash Chip Data * @param base		[BOARDSPECIFIC] address to access OneNAND * @param chipsize	[INTERN] the size of one chip for multichip arrays * @param device_id	[INTERN] device ID * @param verstion_id	[INTERN] version ID * @param options	[BOARDSPECIFIC] various chip options. They can partly be set to inform onenand_scan about * @param erase_shift	[INTERN] number of address bits in a block * @param page_shift	[INTERN] number of address bits in a page * @param ppb_shift	[INTERN] number of address bits in a pages per block * @param page_mask	[INTERN] a page per block mask * @param writesize	[INTERN] a real page size * @param bufferam_index	[INTERN] BufferRAM index * @param bufferam	[INTERN] BufferRAM info * @param readw		[REPLACEABLE] hardware specific function for read short * @param writew	[REPLACEABLE] hardware specific function for write short * @param command	[REPLACEABLE] hardware specific function for writing commands to the chip * @param wait		[REPLACEABLE] hardware specific function for wait on ready * @param read_bufferram	[REPLACEABLE] hardware specific function for BufferRAM Area * @param write_bufferram	[REPLACEABLE] hardware specific function for BufferRAM Area * @param chip_lock	[INTERN] spinlock used to protect access to this structure and the chip * @param wq		[INTERN] wait queue to sleep on if a OneNAND operation is in progress * @param state		[INTERN] the current state of the OneNAND device * @param autooob	[REPLACEABLE] the default (auto)placement scheme * @param priv		[OPTIONAL] pointer to private chip date */struct onenand_chip {	void __iomem *base;	unsigned int chipsize;	unsigned int device_id;	unsigned int version_id;	unsigned int density_mask;	unsigned int options;	unsigned int erase_shift;	unsigned int page_shift;	unsigned int ppb_shift;	/* Pages per block shift */	unsigned int page_mask;	unsigned int writesize;	unsigned int bufferram_index;	struct onenand_bufferram bufferram[MAX_BUFFERRAM];	int (*command) (struct mtd_info *mtd, int cmd, loff_t address,			size_t len);	int (*wait) (struct mtd_info *mtd, int state);	int (*bbt_wait) (struct mtd_info *mtd, int state);	int (*read_bufferram) (struct mtd_info *mtd, loff_t addr, int area,			       unsigned char *buffer, int offset, size_t count);	int (*read_spareram) (struct mtd_info *mtd, loff_t addr, int area,			       unsigned char *buffer, int offset, size_t count);	int (*write_bufferram) (struct mtd_info *mtd, loff_t addr, int area,				const unsigned char *buffer, int offset,				size_t count);	unsigned short (*read_word) (void __iomem *addr);	void (*write_word) (unsigned short value, void __iomem *addr);	void (*mmcontrol) (struct mtd_info *mtd, int sync_read);	int (*block_markbad)(struct mtd_info *mtd, loff_t ofs);	int (*scan_bbt)(struct mtd_info *mtd);	unsigned char		*main_buf;	unsigned char		*spare_buf;#ifdef DONT_USE_UBOOT	spinlock_t chip_lock;	wait_queue_head_t wq;#endif	int state;	unsigned char		*page_buf;	unsigned char		*oob_buf;	struct nand_oobinfo *autooob;	int			subpagesize;	struct nand_ecclayout	*ecclayout;	void *bbm;	void *priv;};/* * Helper macros */#define ONENAND_CURRENT_BUFFERRAM(this)		(this->bufferram_index)#define ONENAND_NEXT_BUFFERRAM(this)		(this->bufferram_index ^ 1)#define ONENAND_SET_NEXT_BUFFERRAM(this)	(this->bufferram_index ^= 1)#define ONENAND_SET_PREV_BUFFERRAM(this)	(this->bufferram_index ^= 1)#define ONENAND_SET_BUFFERRAM0(this)		(this->bufferram_index = 0)#define ONENAND_SET_BUFFERRAM1(this)		(this->bufferram_index = 1)#define ONENAND_IS_DDP(this)						\	(this->device_id & ONENAND_DEVICE_IS_DDP)#define ONENAND_IS_2PLANE(this)			(0)/* * Options bits */#define ONENAND_HAS_CONT_LOCK		(0x0001)#define ONENAND_HAS_UNLOCK_ALL		(0x0002)#define ONENAND_HAS_2PLANE		(0x0004)#define ONENAND_PAGEBUF_ALLOC		(0x1000)#define ONENAND_OOBBUF_ALLOC		(0x2000)/* * OneNAND Flash Manufacturer ID Codes */#define ONENAND_MFR_SAMSUNG	0xec/** * struct nand_manufacturers - NAND Flash Manufacturer ID Structure * @param name:		Manufacturer name * @param id:		manufacturer ID code of device.*/struct onenand_manufacturers {	int id;	char *name;};int onenand_bbt_read_oob(struct mtd_info *mtd, loff_t from,			struct mtd_oob_ops *ops);#endif				/* __LINUX_MTD_ONENAND_H */