[net-next-2.6.git] / include / linux / mtd / onenand.h

/*
 *  linux/include/linux/mtd/onenand.h
 *
 *  Copyright (C) 2005-2006 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/spinlock.h>
#include <linux/completion.h>
#include <linux/mtd/onenand_regs.h>
#include <linux/mtd/bbm.h>

#define MAX_BUFFERRAM		2

/* 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);

/*
 * onenand_state_t - chip states
 * Enumeration for OneNAND flash chip state
 */
typedef enum {
	FL_READY,
	FL_READING,
	FL_WRITING,
	FL_ERASING,
	FL_SYNCING,
	FL_UNLOCKING,
	FL_LOCKING,
	FL_RESETING,
	FL_OTPING,
	FL_PM_SUSPENDED,
} onenand_state_t;

/**
 * struct onenand_bufferram - OneNAND BufferRAM Data
 * @block:		block address in BufferRAM
 * @page:		page address in BufferRAM
 * @valid:		valid flag
 */
struct onenand_bufferram {
	int block;
	int page;
	int valid;
};

/**
 * struct onenand_chip - OneNAND Private Flash Chip Data
 * @base:		[BOARDSPECIFIC] address to access OneNAND
 * @chipsize:		[INTERN] the size of one chip for multichip arrays
 * @device_id:		[INTERN] device ID
 * @density_mask:	chip density, used for DDP devices
 * @verstion_id:	[INTERN] version ID
 * @options:		[BOARDSPECIFIC] various chip options. They can
 *			partly be set to inform onenand_scan about
 * @erase_shift:	[INTERN] number of address bits in a block
 * @page_shift:		[INTERN] number of address bits in a page
 * @ppb_shift:		[INTERN] number of address bits in a pages per block
 * @page_mask:		[INTERN] a page per block mask
 * @bufferram_index:	[INTERN] BufferRAM index
 * @bufferram:		[INTERN] BufferRAM info
 * @readw:		[REPLACEABLE] hardware specific function for read short
 * @writew:		[REPLACEABLE] hardware specific function for write short
 * @command:		[REPLACEABLE] hardware specific function for writing
 *			commands to the chip
 * @wait:		[REPLACEABLE] hardware specific function for wait on ready
 * @read_bufferram:	[REPLACEABLE] hardware specific function for BufferRAM Area
 * @write_bufferram:	[REPLACEABLE] hardware specific function for BufferRAM Area
 * @read_word:		[REPLACEABLE] hardware specific function for read
 *			register of OneNAND
 * @write_word:		[REPLACEABLE] hardware specific function for write
 *			register of OneNAND
 * @mmcontrol:		sync burst read function
 * @block_markbad:	function to mark a block as bad
 * @scan_bbt:		[REPLACEALBE] hardware specific function for scanning
 *			Bad block Table
 * @chip_lock:		[INTERN] spinlock used to protect access to this
 *			structure and the chip
 * @wq:			[INTERN] wait queue to sleep on if a OneNAND
 *			operation is in progress
 * @state:		[INTERN] the current state of the OneNAND device
 * @page_buf:		data buffer
 * @ecclayout:		[REPLACEABLE] the default ecc placement scheme
 * @bbm:		[REPLACEABLE] pointer to Bad Block Management
 * @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		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 (*read_bufferram)(struct mtd_info *mtd, int area,
			unsigned char *buffer, int offset, size_t count);
	int (*write_bufferram)(struct mtd_info *mtd, 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);

	struct completion	complete;
	int			irq;

	spinlock_t		chip_lock;
	wait_queue_head_t	wq;
	onenand_state_t		state;
	unsigned char		*page_buf;

	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_GET_SYS_CFG1(this)					\
	(this->read_word(this->base + ONENAND_REG_SYS_CFG1))
#define ONENAND_SET_SYS_CFG1(v, this)					\
	(this->write_word(v, this->base + ONENAND_REG_SYS_CFG1))

/* Check byte access in OneNAND */
#define ONENAND_CHECK_BYTE_ACCESS(addr)		(addr & 0x1)

/*
 * Options bits
 */
#define ONENAND_HAS_CONT_LOCK		(0x0001)
#define ONENAND_HAS_UNLOCK_ALL		(0x0002)
#define ONENAND_PAGEBUF_ALLOC		(0x1000)

/*
 * OneNAND Flash Manufacturer ID Codes
 */
#define ONENAND_MFR_SAMSUNG	0xec

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

#endif	/* __LINUX_MTD_ONENAND_H */
Commit	Line	Data
cd5f6346 KP	1	/*
	2	* linux/include/linux/mtd/onenand.h
	3	*
28b79ff9	4	* Copyright (C) 2005-2006 Samsung Electronics
cd5f6346 KP	5	* Kyungmin Park <kyungmin.park@samsung.com>
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License version 2 as
	9	* published by the Free Software Foundation.
	10	*/
	11
	12	#ifndef __LINUX_MTD_ONENAND_H
	13	#define __LINUX_MTD_ONENAND_H
	14
	15	#include <linux/spinlock.h>
2c22120f	16	#include <linux/completion.h>
cd5f6346	17	#include <linux/mtd/onenand_regs.h>
cdc00130	18	#include <linux/mtd/bbm.h>
cd5f6346 KP	19
	20	#define MAX_BUFFERRAM 2
	21
	22	/* Scan and identify a OneNAND device */
	23	extern int onenand_scan(struct mtd_info *mtd, int max_chips);
	24	/* Free resources held by the OneNAND device */
	25	extern void onenand_release(struct mtd_info *mtd);
	26
ea9b6dcc	27	/*
cd5f6346 KP	28	* onenand_state_t - chip states
	29	* Enumeration for OneNAND flash chip state
	30	*/
	31	typedef enum {
	32	FL_READY,
	33	FL_READING,
	34	FL_WRITING,
	35	FL_ERASING,
	36	FL_SYNCING,
	37	FL_UNLOCKING,
	38	FL_LOCKING,
493c6460 KP	39	FL_RESETING,
493c6460 KP	40	FL_OTPING,
a41371eb	41	FL_PM_SUSPENDED,
cd5f6346 KP	42	} onenand_state_t;
	43
	44	/**
	45	* struct onenand_bufferram - OneNAND BufferRAM Data
ea9b6dcc RD	46	* @block: block address in BufferRAM
	47	* @page: page address in BufferRAM
	48	* @valid: valid flag
cd5f6346 KP	49	*/
	50	struct onenand_bufferram {
	51	int block;
	52	int page;
	53	int valid;
	54	};
	55
	56	/**
	57	* struct onenand_chip - OneNAND Private Flash Chip Data
ea9b6dcc RD	58	* @base: [BOARDSPECIFIC] address to access OneNAND
	59	* @chipsize: [INTERN] the size of one chip for multichip arrays
	60	* @device_id: [INTERN] device ID
	61	* @density_mask: chip density, used for DDP devices
	62	* @verstion_id: [INTERN] version ID
	63	* @options: [BOARDSPECIFIC] various chip options. They can
	64	* partly be set to inform onenand_scan about
	65	* @erase_shift: [INTERN] number of address bits in a block
	66	* @page_shift: [INTERN] number of address bits in a page
	67	* @ppb_shift: [INTERN] number of address bits in a pages per block
	68	* @page_mask: [INTERN] a page per block mask
	69	* @bufferram_index: [INTERN] BufferRAM index
	70	* @bufferram: [INTERN] BufferRAM info
	71	* @readw: [REPLACEABLE] hardware specific function for read short
	72	* @writew: [REPLACEABLE] hardware specific function for write short
	73	* @command: [REPLACEABLE] hardware specific function for writing
	74	* commands to the chip
	75	* @wait: [REPLACEABLE] hardware specific function for wait on ready
	76	* @read_bufferram: [REPLACEABLE] hardware specific function for BufferRAM Area
	77	* @write_bufferram: [REPLACEABLE] hardware specific function for BufferRAM Area
	78	* @read_word: [REPLACEABLE] hardware specific function for read
	79	* register of OneNAND
	80	* @write_word: [REPLACEABLE] hardware specific function for write
	81	* register of OneNAND
	82	* @mmcontrol: sync burst read function
	83	* @block_markbad: function to mark a block as bad
	84	* @scan_bbt: [REPLACEALBE] hardware specific function for scanning
	85	* Bad block Table
	86	* @chip_lock: [INTERN] spinlock used to protect access to this
	87	* structure and the chip
	88	* @wq: [INTERN] wait queue to sleep on if a OneNAND
	89	* operation is in progress
	90	* @state: [INTERN] the current state of the OneNAND device
	91	* @page_buf: data buffer
	92	* @ecclayout: [REPLACEABLE] the default ecc placement scheme
	93	* @bbm: [REPLACEABLE] pointer to Bad Block Management
	94	* @priv: [OPTIONAL] pointer to private chip date
cd5f6346 KP	95	*/
	96	struct onenand_chip {
	97	void __iomem *base;
	98	unsigned int chipsize;
	99	unsigned int device_id;
28b79ff9	100	unsigned int version_id;
83a36838	101	unsigned int density_mask;
cd5f6346 KP	102	unsigned int options;
	103
	104	unsigned int erase_shift;
	105	unsigned int page_shift;
	106	unsigned int ppb_shift; /* Pages per block shift */
	107	unsigned int page_mask;
	108
	109	unsigned int bufferram_index;
	110	struct onenand_bufferram bufferram[MAX_BUFFERRAM];
	111
	112	int (command)(struct mtd_info mtd, int cmd, loff_t address, size_t len);
	113	int (wait)(struct mtd_info mtd, int state);
	114	int (read_bufferram)(struct mtd_info mtd, int area,
	115	unsigned char *buffer, int offset, size_t count);
	116	int (write_bufferram)(struct mtd_info mtd, int area,
	117	const unsigned char *buffer, int offset, size_t count);
	118	unsigned short (read_word)(void __iomem addr);
	119	void (write_word)(unsigned short value, void __iomem addr);
52b0eea7	120	void (mmcontrol)(struct mtd_info mtd, int sync_read);
cdc00130 KP	121	int (block_markbad)(struct mtd_info mtd, loff_t ofs);
cdc00130 KP	122	int (scan_bbt)(struct mtd_info mtd);
cd5f6346	123
2c22120f KP	124	struct completion complete;
	125	int irq;
	126
cd5f6346 KP	127	spinlock_t chip_lock;
	128	wait_queue_head_t wq;
	129	onenand_state_t state;
532a37cf	130	unsigned char *page_buf;
cd5f6346	131
5bd34c09	132	struct nand_ecclayout *ecclayout;
cd5f6346	133
5bd34c09	134	void *bbm;
cdc00130	135
cd5f6346 KP	136	void *priv;
	137	};
	138
fcc31470 KP	139	/*
	140	* Helper macros
	141	*/
cd5f6346 KP	142	#define ONENAND_CURRENT_BUFFERRAM(this) (this->bufferram_index)
	143	#define ONENAND_NEXT_BUFFERRAM(this) (this->bufferram_index ^ 1)
	144	#define ONENAND_SET_NEXT_BUFFERRAM(this) (this->bufferram_index ^= 1)
	145
fcc31470 KP	146	#define ONENAND_GET_SYS_CFG1(this) \
	147	(this->read_word(this->base + ONENAND_REG_SYS_CFG1))
	148	#define ONENAND_SET_SYS_CFG1(v, this) \
	149	(this->write_word(v, this->base + ONENAND_REG_SYS_CFG1))
	150
9c01f87d KP	151	/* Check byte access in OneNAND */
	152	#define ONENAND_CHECK_BYTE_ACCESS(addr) (addr & 0x1)
	153
cd5f6346 KP	154	/*
	155	* Options bits
	156	*/
28b79ff9 KP	157	#define ONENAND_HAS_CONT_LOCK (0x0001)
28b79ff9 KP	158	#define ONENAND_HAS_UNLOCK_ALL (0x0002)
532a37cf	159	#define ONENAND_PAGEBUF_ALLOC (0x1000)
cd5f6346 KP	160
	161	/*
	162	* OneNAND Flash Manufacturer ID Codes
	163	*/
	164	#define ONENAND_MFR_SAMSUNG 0xec
cd5f6346 KP	165
cd5f6346 KP	166	/**
ea9b6dcc RD	167	* struct onenand_manufacturers - NAND Flash Manufacturer ID Structure
	168	* @name: Manufacturer name
	169	* @id: manufacturer ID code of device.
cd5f6346 KP	170	*/
	171	struct onenand_manufacturers {
	172	int id;
	173	char *name;
	174	};
	175
	176	#endif /* __LINUX_MTD_ONENAND_H */