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

/*
 * Copyright (C) 1999-2003 David Woodhouse <dwmw2@infradead.org> et al.
 *
 * Released under GPL
 */

#ifndef __MTD_MTD_H__
#define __MTD_MTD_H__

#include <linux/types.h>
#include <linux/module.h>
#include <linux/uio.h>
#include <linux/notifier.h>

#include <linux/mtd/compatmac.h>
#include <mtd/mtd-abi.h>

#include <asm/div64.h>

#define MTD_CHAR_MAJOR 90
#define MTD_BLOCK_MAJOR 31
#define MAX_MTD_DEVICES 32

#define MTD_ERASE_PENDING      	0x01
#define MTD_ERASING		0x02
#define MTD_ERASE_SUSPEND	0x04
#define MTD_ERASE_DONE          0x08
#define MTD_ERASE_FAILED        0x10

#define MTD_FAIL_ADDR_UNKNOWN -1LL

/* If the erase fails, fail_addr might indicate exactly which block failed.  If
   fail_addr = MTD_FAIL_ADDR_UNKNOWN, the failure was not at the device level or was not
   specific to any particular block. */
struct erase_info {
	struct mtd_info *mtd;
	uint64_t addr;
	uint64_t len;
	uint64_t fail_addr;
	u_long time;
	u_long retries;
	u_int dev;
	u_int cell;
	void (*callback) (struct erase_info *self);
	u_long priv;
	u_char state;
	struct erase_info *next;
};

struct mtd_erase_region_info {
	uint64_t offset;			/* At which this region starts, from the beginning of the MTD */
	u_int32_t erasesize;		/* For this region */
	u_int32_t numblocks;		/* Number of blocks of erasesize in this region */
	unsigned long *lockmap;		/* If keeping bitmap of locks */
};

/*
 * oob operation modes
 *
 * MTD_OOB_PLACE:	oob data are placed at the given offset
 * MTD_OOB_AUTO:	oob data are automatically placed at the free areas
 *			which are defined by the ecclayout
 * MTD_OOB_RAW:		mode to read raw data+oob in one chunk. The oob data
 *			is inserted into the data. Thats a raw image of the
 *			flash contents.
 */
typedef enum {
	MTD_OOB_PLACE,
	MTD_OOB_AUTO,
	MTD_OOB_RAW,
} mtd_oob_mode_t;

/**
 * struct mtd_oob_ops - oob operation operands
 * @mode:	operation mode
 *
 * @len:	number of data bytes to write/read
 *
 * @retlen:	number of data bytes written/read
 *
 * @ooblen:	number of oob bytes to write/read
 * @oobretlen:	number of oob bytes written/read
 * @ooboffs:	offset of oob data in the oob area (only relevant when
 *		mode = MTD_OOB_PLACE)
 * @datbuf:	data buffer - if NULL only oob data are read/written
 * @oobbuf:	oob data buffer
 *
 * Note, it is allowed to read more then one OOB area at one go, but not write.
 * The interface assumes that the OOB write requests program only one page's
 * OOB area.
 */
struct mtd_oob_ops {
	mtd_oob_mode_t	mode;
	size_t		len;
	size_t		retlen;
	size_t		ooblen;
	size_t		oobretlen;
	uint32_t	ooboffs;
	uint8_t		*datbuf;
	uint8_t		*oobbuf;
};

struct mtd_info {
	u_char type;
	u_int32_t flags;
	uint64_t size;	 // Total size of the MTD

	/* "Major" erase size for the device. Naïve users may take this
	 * to be the only erase size available, or may use the more detailed
	 * information below if they desire
	 */
	u_int32_t erasesize;
	/* Minimal writable flash unit size. In case of NOR flash it is 1 (even
	 * though individual bits can be cleared), in case of NAND flash it is
	 * one NAND page (or half, or one-fourths of it), in case of ECC-ed NOR
	 * it is of ECC block size, etc. It is illegal to have writesize = 0.
	 * Any driver registering a struct mtd_info must ensure a writesize of
	 * 1 or larger.
	 */
	u_int32_t writesize;

	u_int32_t oobsize;   // Amount of OOB data per block (e.g. 16)
	u_int32_t oobavail;  // Available OOB bytes per block

	/*
	 * If erasesize is a power of 2 then the shift is stored in
	 * erasesize_shift otherwise erasesize_shift is zero. Ditto writesize.
	 */
	unsigned int erasesize_shift;
	unsigned int writesize_shift;
	/* Masks based on erasesize_shift and writesize_shift */
	unsigned int erasesize_mask;
	unsigned int writesize_mask;

	// Kernel-only stuff starts here.
	const char *name;
	int index;

	/* ecc layout structure pointer - read only ! */
	struct nand_ecclayout *ecclayout;

	/* Data for variable erase regions. If numeraseregions is zero,
	 * it means that the whole device has erasesize as given above.
	 */
	int numeraseregions;
	struct mtd_erase_region_info *eraseregions;

	/*
	 * Erase is an asynchronous operation.  Device drivers are supposed
	 * to call instr->callback() whenever the operation completes, even
	 * if it completes with a failure.
	 * Callers are supposed to pass a callback function and wait for it
	 * to be called before writing to the block.
	 */
	int (*erase) (struct mtd_info *mtd, struct erase_info *instr);

	/* This stuff for eXecute-In-Place */
	/* phys is optional and may be set to NULL */
	int (*point) (struct mtd_info *mtd, loff_t from, size_t len,
			size_t *retlen, void **virt, resource_size_t *phys);

	/* We probably shouldn't allow XIP if the unpoint isn't a NULL */
	void (*unpoint) (struct mtd_info *mtd, loff_t from, size_t len);


	int (*read) (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf);
	int (*write) (struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const u_char *buf);

	/* In blackbox flight recorder like scenarios we want to make successful
	   writes in interrupt context. panic_write() is only intended to be
	   called when its known the kernel is about to panic and we need the
	   write to succeed. Since the kernel is not going to be running for much
	   longer, this function can break locks and delay to ensure the write
	   succeeds (but not sleep). */

	int (*panic_write) (struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const u_char *buf);

	int (*read_oob) (struct mtd_info *mtd, loff_t from,
			 struct mtd_oob_ops *ops);
	int (*write_oob) (struct mtd_info *mtd, loff_t to,
			 struct mtd_oob_ops *ops);

	/*
	 * Methods to access the protection register area, present in some
	 * flash devices. The user data is one time programmable but the
	 * factory data is read only.
	 */
	int (*get_fact_prot_info) (struct mtd_info *mtd, struct otp_info *buf, size_t len);
	int (*read_fact_prot_reg) (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf);
	int (*get_user_prot_info) (struct mtd_info *mtd, struct otp_info *buf, size_t len);
	int (*read_user_prot_reg) (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf);
	int (*write_user_prot_reg) (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf);
	int (*lock_user_prot_reg) (struct mtd_info *mtd, loff_t from, size_t len);

	/* kvec-based read/write methods.
	   NB: The 'count' parameter is the number of _vectors_, each of
	   which contains an (ofs, len) tuple.
	*/
	int (*writev) (struct mtd_info *mtd, const struct kvec *vecs, unsigned long count, loff_t to, size_t *retlen);

	/* Sync */
	void (*sync) (struct mtd_info *mtd);

	/* Chip-supported device locking */
	int (*lock) (struct mtd_info *mtd, loff_t ofs, uint64_t len);
	int (*unlock) (struct mtd_info *mtd, loff_t ofs, uint64_t len);

	/* Power Management functions */
	int (*suspend) (struct mtd_info *mtd);
	void (*resume) (struct mtd_info *mtd);

	/* Bad block management functions */
	int (*block_isbad) (struct mtd_info *mtd, loff_t ofs);
	int (*block_markbad) (struct mtd_info *mtd, loff_t ofs);

	struct notifier_block reboot_notifier;  /* default mode before reboot */

	/* ECC status information */
	struct mtd_ecc_stats ecc_stats;
	/* Subpage shift (NAND) */
	int subpage_sft;

	void *priv;

	struct module *owner;
	int usecount;

	/* If the driver is something smart, like UBI, it may need to maintain
	 * its own reference counting. The below functions are only for driver.
	 * The driver may register its callbacks. These callbacks are not
	 * supposed to be called by MTD users */
	int (*get_device) (struct mtd_info *mtd);
	void (*put_device) (struct mtd_info *mtd);
};

static inline u_int32_t mtd_div_by_eb(uint64_t sz, struct mtd_info *mtd)
{
	if (mtd->erasesize_shift)
		return sz >> mtd->erasesize_shift;
	do_div(sz, mtd->erasesize);
	return sz;
}

static inline u_int32_t mtd_mod_by_eb(uint64_t sz, struct mtd_info *mtd)
{
	if (mtd->erasesize_shift)
		return sz & mtd->erasesize_mask;
	return do_div(sz, mtd->erasesize);
}

static inline u_int32_t mtd_div_by_ws(uint64_t sz, struct mtd_info *mtd)
{
	if (mtd->writesize_shift)
		return sz >> mtd->writesize_shift;
	do_div(sz, mtd->writesize);
	return sz;
}

static inline u_int32_t mtd_mod_by_ws(uint64_t sz, struct mtd_info *mtd)
{
	if (mtd->writesize_shift)
		return sz & mtd->writesize_mask;
	return do_div(sz, mtd->writesize);
}

	/* Kernel-side ioctl definitions */

extern int add_mtd_device(struct mtd_info *mtd);
extern int del_mtd_device (struct mtd_info *mtd);

extern struct mtd_info *get_mtd_device(struct mtd_info *mtd, int num);
extern struct mtd_info *get_mtd_device_nm(const char *name);

extern void put_mtd_device(struct mtd_info *mtd);


struct mtd_notifier {
	void (*add)(struct mtd_info *mtd);
	void (*remove)(struct mtd_info *mtd);
	struct list_head list;
};


extern void register_mtd_user (struct mtd_notifier *new);
extern int unregister_mtd_user (struct mtd_notifier *old);

int default_mtd_writev(struct mtd_info *mtd, const struct kvec *vecs,
		       unsigned long count, loff_t to, size_t *retlen);

int default_mtd_readv(struct mtd_info *mtd, struct kvec *vecs,
		      unsigned long count, loff_t from, size_t *retlen);

#ifdef CONFIG_MTD_PARTITIONS
void mtd_erase_callback(struct erase_info *instr);
#else
static inline void mtd_erase_callback(struct erase_info *instr)
{
	if (instr->callback)
		instr->callback(instr);
}
#endif

/*
 * Debugging macro and defines
 */
#define MTD_DEBUG_LEVEL0	(0)	/* Quiet   */
#define MTD_DEBUG_LEVEL1	(1)	/* Audible */
#define MTD_DEBUG_LEVEL2	(2)	/* Loud    */
#define MTD_DEBUG_LEVEL3	(3)	/* Noisy   */

#ifdef CONFIG_MTD_DEBUG
#define DEBUG(n, args...)				\
	do {						\
		if (n <= CONFIG_MTD_DEBUG_VERBOSE)	\
			printk(KERN_INFO args);		\
	} while(0)
#else /* CONFIG_MTD_DEBUG */
#define DEBUG(n, args...)				\
	do {						\
		if (0)					\
			printk(KERN_INFO args);		\
	} while(0)

#endif /* CONFIG_MTD_DEBUG */

#endif /* __MTD_MTD_H__ */
Commit	Line	Data
61ecfa87	1	/*
1da177e4 LT	2	* Copyright (C) 1999-2003 David Woodhouse <dwmw2@infradead.org> et al.
	3	*
	4	* Released under GPL
	5	*/
	6
	7	#ifndef __MTD_MTD_H__
	8	#define __MTD_MTD_H__
	9
1da177e4 LT	10	#include <linux/types.h>
	11	#include <linux/module.h>
	12	#include <linux/uio.h>
963a6fb0	13	#include <linux/notifier.h>
1da177e4 LT	14
	15	#include <linux/mtd/compatmac.h>
	16	#include <mtd/mtd-abi.h>
	17
69423d99 AH	18	#include <asm/div64.h>
69423d99 AH	19
1da177e4 LT	20	#define MTD_CHAR_MAJOR 90
1da177e4 LT	21	#define MTD_BLOCK_MAJOR 31
c0fe10ae	22	#define MAX_MTD_DEVICES 32
1da177e4 LT	23
	24	#define MTD_ERASE_PENDING 0x01
	25	#define MTD_ERASING 0x02
	26	#define MTD_ERASE_SUSPEND 0x04
	27	#define MTD_ERASE_DONE 0x08
	28	#define MTD_ERASE_FAILED 0x10
	29
69423d99	30	#define MTD_FAIL_ADDR_UNKNOWN -1LL
bb0eb217	31
1da177e4	32	/* If the erase fails, fail_addr might indicate exactly which block failed. If
bb0eb217	33	fail_addr = MTD_FAIL_ADDR_UNKNOWN, the failure was not at the device level or was not
1da177e4 LT	34	specific to any particular block. */
	35	struct erase_info {
	36	struct mtd_info *mtd;
69423d99 AH	37	uint64_t addr;
	38	uint64_t len;
	39	uint64_t fail_addr;
1da177e4 LT	40	u_long time;
	41	u_long retries;
	42	u_int dev;
	43	u_int cell;
	44	void (callback) (struct erase_info self);
	45	u_long priv;
	46	u_char state;
	47	struct erase_info *next;
	48	};
	49
	50	struct mtd_erase_region_info {
69423d99	51	uint64_t offset; /* At which this region starts, from the beginning of the MTD */
1da177e4 LT	52	u_int32_t erasesize; /* For this region */
1da177e4 LT	53	u_int32_t numblocks; /* Number of blocks of erasesize in this region */
0ecbc81a	54	unsigned long lockmap; / If keeping bitmap of locks */
1da177e4 LT	55	};
1da177e4 LT	56
8593fbc6 TG	57	/*
	58	* oob operation modes
	59	*
	60	* MTD_OOB_PLACE: oob data are placed at the given offset
	61	* MTD_OOB_AUTO: oob data are automatically placed at the free areas
	62	* which are defined by the ecclayout
	63	* MTD_OOB_RAW: mode to read raw data+oob in one chunk. The oob data
	64	* is inserted into the data. Thats a raw image of the
	65	* flash contents.
	66	*/
	67	typedef enum {
	68	MTD_OOB_PLACE,
	69	MTD_OOB_AUTO,
	70	MTD_OOB_RAW,
	71	} mtd_oob_mode_t;
	72
	73	/**
	74	* struct mtd_oob_ops - oob operation operands
	75	* @mode: operation mode
	76	*
7014568b	77	* @len: number of data bytes to write/read
8593fbc6	78	*
7014568b	79	* @retlen: number of data bytes written/read
8593fbc6	80	*
7014568b VW	81	* @ooblen: number of oob bytes to write/read
7014568b VW	82	* @oobretlen: number of oob bytes written/read
8593fbc6 TG	83	* @ooboffs: offset of oob data in the oob area (only relevant when
	84	* mode = MTD_OOB_PLACE)
	85	* @datbuf: data buffer - if NULL only oob data are read/written
	86	* @oobbuf: oob data buffer
73a4421c AB	87	*
	88	* Note, it is allowed to read more then one OOB area at one go, but not write.
	89	* The interface assumes that the OOB write requests program only one page's
	90	* OOB area.
8593fbc6 TG	91	*/
	92	struct mtd_oob_ops {
	93	mtd_oob_mode_t mode;
	94	size_t len;
	95	size_t retlen;
	96	size_t ooblen;
7014568b	97	size_t oobretlen;
8593fbc6 TG	98	uint32_t ooboffs;
	99	uint8_t *datbuf;
	100	uint8_t *oobbuf;
	101	};
	102
1da177e4 LT	103	struct mtd_info {
	104	u_char type;
	105	u_int32_t flags;
69423d99	106	uint64_t size; // Total size of the MTD
1da177e4	107
151e7659	108	/* "Major" erase size for the device. Naïve users may take this
1da177e4 LT	109	* to be the only erase size available, or may use the more detailed
	110	* information below if they desire
	111	*/
	112	u_int32_t erasesize;
783ed81f AB	113	/* Minimal writable flash unit size. In case of NOR flash it is 1 (even
	114	* though individual bits can be cleared), in case of NAND flash it is
	115	* one NAND page (or half, or one-fourths of it), in case of ECC-ed NOR
	116	* it is of ECC block size, etc. It is illegal to have writesize = 0.
	117	* Any driver registering a struct mtd_info must ensure a writesize of
	118	* 1 or larger.
28318776 JE	119	*/
28318776 JE	120	u_int32_t writesize;
1da177e4	121
1da177e4	122	u_int32_t oobsize; // Amount of OOB data per block (e.g. 16)
1f92267c	123	u_int32_t oobavail; // Available OOB bytes per block
638d9838	124
69423d99 AH	125	/*
	126	* If erasesize is a power of 2 then the shift is stored in
	127	* erasesize_shift otherwise erasesize_shift is zero. Ditto writesize.
	128	*/
	129	unsigned int erasesize_shift;
	130	unsigned int writesize_shift;
	131	/* Masks based on erasesize_shift and writesize_shift */
	132	unsigned int erasesize_mask;
	133	unsigned int writesize_mask;
	134
1da177e4	135	// Kernel-only stuff starts here.
eadcf0d7	136	const char *name;
1da177e4 LT	137	int index;
1da177e4 LT	138
5bd34c09 TG	139	/* ecc layout structure pointer - read only ! */
5bd34c09 TG	140	struct nand_ecclayout *ecclayout;
1da177e4 LT	141
1da177e4 LT	142	/* Data for variable erase regions. If numeraseregions is zero,
61ecfa87	143	* it means that the whole device has erasesize as given above.
1da177e4 LT	144	*/
1da177e4 LT	145	int numeraseregions;
61ecfa87	146	struct mtd_erase_region_info *eraseregions;
1da177e4	147
b38178ee JE	148	/*
	149	* Erase is an asynchronous operation. Device drivers are supposed
	150	* to call instr->callback() whenever the operation completes, even
	151	* if it completes with a failure.
	152	* Callers are supposed to pass a callback function and wait for it
	153	* to be called before writing to the block.
	154	*/
1da177e4 LT	155	int (erase) (struct mtd_info mtd, struct erase_info *instr);
	156
	157	/* This stuff for eXecute-In-Place */
a98889f3 JH	158	/* phys is optional and may be set to NULL */
	159	int (point) (struct mtd_info mtd, loff_t from, size_t len,
	160	size_t retlen, void virt, resource_size_t phys);
1da177e4 LT	161
1da177e4 LT	162	/* We probably shouldn't allow XIP if the unpoint isn't a NULL */
a98889f3	163	void (unpoint) (struct mtd_info mtd, loff_t from, size_t len);
1da177e4 LT	164
	165
	166	int (read) (struct mtd_info mtd, loff_t from, size_t len, size_t retlen, u_char buf);
	167	int (write) (struct mtd_info mtd, loff_t to, size_t len, size_t retlen, const u_char buf);
	168
388bbb09 RP	169	/* In blackbox flight recorder like scenarios we want to make successful
	170	writes in interrupt context. panic_write() is only intended to be
	171	called when its known the kernel is about to panic and we need the
	172	write to succeed. Since the kernel is not going to be running for much
	173	longer, this function can break locks and delay to ensure the write
	174	succeeds (but not sleep). */
	175
	176	int (panic_write) (struct mtd_info mtd, loff_t to, size_t len, size_t retlen, const u_char buf);
	177
8593fbc6 TG	178	int (read_oob) (struct mtd_info mtd, loff_t from,
	179	struct mtd_oob_ops *ops);
	180	int (write_oob) (struct mtd_info mtd, loff_t to,
	181	struct mtd_oob_ops *ops);
1da177e4	182
61ecfa87 TG	183	/*
61ecfa87 TG	184	* Methods to access the protection register area, present in some
1da177e4	185	* flash devices. The user data is one time programmable but the
61ecfa87	186	* factory data is read only.
1da177e4	187	*/
f77814dd	188	int (get_fact_prot_info) (struct mtd_info mtd, struct otp_info *buf, size_t len);
1da177e4	189	int (read_fact_prot_reg) (struct mtd_info mtd, loff_t from, size_t len, size_t retlen, u_char buf);
f77814dd NP	190	int (get_user_prot_info) (struct mtd_info mtd, struct otp_info *buf, size_t len);
f77814dd NP	191	int (read_user_prot_reg) (struct mtd_info mtd, loff_t from, size_t len, size_t retlen, u_char buf);
1da177e4	192	int (write_user_prot_reg) (struct mtd_info mtd, loff_t from, size_t len, size_t retlen, u_char buf);
f77814dd	193	int (lock_user_prot_reg) (struct mtd_info mtd, loff_t from, size_t len);
1da177e4	194
2528e8cd	195	/* kvec-based read/write methods.
61ecfa87	196	NB: The 'count' parameter is the number of _vectors_, each of
1da177e4 LT	197	which contains an (ofs, len) tuple.
1da177e4 LT	198	*/
1da177e4	199	int (writev) (struct mtd_info mtd, const struct kvec vecs, unsigned long count, loff_t to, size_t retlen);
1da177e4 LT	200
	201	/* Sync */
	202	void (sync) (struct mtd_info mtd);
	203
	204	/* Chip-supported device locking */
69423d99 AH	205	int (lock) (struct mtd_info mtd, loff_t ofs, uint64_t len);
69423d99 AH	206	int (unlock) (struct mtd_info mtd, loff_t ofs, uint64_t len);
1da177e4 LT	207
	208	/* Power Management functions */
	209	int (suspend) (struct mtd_info mtd);
	210	void (resume) (struct mtd_info mtd);
	211
	212	/* Bad block management functions */
	213	int (block_isbad) (struct mtd_info mtd, loff_t ofs);
	214	int (block_markbad) (struct mtd_info mtd, loff_t ofs);
	215
963a6fb0 NP	216	struct notifier_block reboot_notifier; /* default mode before reboot */
963a6fb0 NP	217
7fac4648 TG	218	/* ECC status information */
7fac4648 TG	219	struct mtd_ecc_stats ecc_stats;
29072b96 TG	220	/* Subpage shift (NAND) */
29072b96 TG	221	int subpage_sft;
7fac4648	222
1da177e4 LT	223	void *priv;
	224
	225	struct module *owner;
	226	int usecount;
9fe912ce AB	227
	228	/* If the driver is something smart, like UBI, it may need to maintain
	229	* its own reference counting. The below functions are only for driver.
	230	* The driver may register its callbacks. These callbacks are not
	231	* supposed to be called by MTD users */
	232	int (get_device) (struct mtd_info mtd);
	233	void (put_device) (struct mtd_info mtd);
1da177e4 LT	234	};
1da177e4 LT	235
69423d99 AH	236	static inline u_int32_t mtd_div_by_eb(uint64_t sz, struct mtd_info *mtd)
	237	{
	238	if (mtd->erasesize_shift)
	239	return sz >> mtd->erasesize_shift;
	240	do_div(sz, mtd->erasesize);
	241	return sz;
	242	}
	243
	244	static inline u_int32_t mtd_mod_by_eb(uint64_t sz, struct mtd_info *mtd)
	245	{
	246	if (mtd->erasesize_shift)
	247	return sz & mtd->erasesize_mask;
	248	return do_div(sz, mtd->erasesize);
	249	}
	250
	251	static inline u_int32_t mtd_div_by_ws(uint64_t sz, struct mtd_info *mtd)
	252	{
	253	if (mtd->writesize_shift)
	254	return sz >> mtd->writesize_shift;
	255	do_div(sz, mtd->writesize);
	256	return sz;
	257	}
	258
	259	static inline u_int32_t mtd_mod_by_ws(uint64_t sz, struct mtd_info *mtd)
	260	{
	261	if (mtd->writesize_shift)
	262	return sz & mtd->writesize_mask;
	263	return do_div(sz, mtd->writesize);
	264	}
1da177e4 LT	265
	266	/* Kernel-side ioctl definitions */
	267
	268	extern int add_mtd_device(struct mtd_info *mtd);
	269	extern int del_mtd_device (struct mtd_info *mtd);
	270
	271	extern struct mtd_info get_mtd_device(struct mtd_info mtd, int num);
7799308f	272	extern struct mtd_info get_mtd_device_nm(const char name);
1da177e4 LT	273
	274	extern void put_mtd_device(struct mtd_info *mtd);
	275
	276
	277	struct mtd_notifier {
	278	void (add)(struct mtd_info mtd);
	279	void (remove)(struct mtd_info mtd);
	280	struct list_head list;
	281	};
	282
	283
	284	extern void register_mtd_user (struct mtd_notifier *new);
	285	extern int unregister_mtd_user (struct mtd_notifier *old);
	286
	287	int default_mtd_writev(struct mtd_info mtd, const struct kvec vecs,
	288	unsigned long count, loff_t to, size_t *retlen);
	289
	290	int default_mtd_readv(struct mtd_info mtd, struct kvec vecs,
	291	unsigned long count, loff_t from, size_t *retlen);
	292
1da177e4 LT	293	#ifdef CONFIG_MTD_PARTITIONS
	294	void mtd_erase_callback(struct erase_info *instr);
	295	#else
	296	static inline void mtd_erase_callback(struct erase_info *instr)
	297	{
	298	if (instr->callback)
	299	instr->callback(instr);
	300	}
	301	#endif
	302
	303	/*
	304	* Debugging macro and defines
	305	*/
	306	#define MTD_DEBUG_LEVEL0 (0) /* Quiet */
	307	#define MTD_DEBUG_LEVEL1 (1) /* Audible */
	308	#define MTD_DEBUG_LEVEL2 (2) /* Loud */
	309	#define MTD_DEBUG_LEVEL3 (3) /* Noisy */
	310
	311	#ifdef CONFIG_MTD_DEBUG
	312	#define DEBUG(n, args...) \
f4a43cfc	313	do { \
1da177e4 LT	314	if (n <= CONFIG_MTD_DEBUG_VERBOSE) \
	315	printk(KERN_INFO args); \
	316	} while(0)
	317	#else /* CONFIG_MTD_DEBUG */
95b1bc20 DB	318	#define DEBUG(n, args...) \
	319	do { \
	320	if (0) \
	321	printk(KERN_INFO args); \
	322	} while(0)
1da177e4 LT	323
	324	#endif /* CONFIG_MTD_DEBUG */
	325
	326	#endif /* __MTD_MTD_H__ */