[people/ms/u-boot.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 <div64.h>
#include <linux/mtd/mtd-abi.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

/*
 * Enumeration for NAND/OneNAND flash chip state
 */
enum {
	FL_READY,
	FL_READING,
	FL_WRITING,
	FL_ERASING,
	FL_SYNCING,
	FL_CACHEDPRG,
	FL_RESETING,
	FL_UNLOCKING,
	FL_LOCKING,
	FL_PM_SUSPENDED,
};

/* 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 */

	/* 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, phys_addr_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);

/* XXX U-BOOT XXX */
#if 0
	/* 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);
#endif

	/* 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);

/* XXX U-BOOT XXX */
#if 0
	struct notifier_block reboot_notifier;  /* default mode before reboot */
#endif

	/* 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 uint32_t mtd_div_by_eb(uint64_t sz, struct mtd_info *mtd)
{
	do_div(sz, mtd->erasesize);
	return sz;
}

static inline uint32_t mtd_mod_by_eb(uint64_t sz, struct mtd_info *mtd)
{
	return do_div(sz, mtd->erasesize);
}

	/* 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);

/* XXX U-BOOT XXX */
#if 0
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);
#endif

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

#endif /* __MTD_MTD_H__ */
Commit	Line	Data
ac7eb8a3	1	/*
932394ac WD	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__
cfa460ad	9
932394ac	10	#include <linux/types.h>
8d2effea	11	#include <div64.h>
932394ac WD	12	#include <linux/mtd/mtd-abi.h>
932394ac WD	13
cfa460ad WJ	14	#define MTD_CHAR_MAJOR 90
	15	#define MTD_BLOCK_MAJOR 31
	16	#define MAX_MTD_DEVICES 32
932394ac	17
53677ef1	18	#define MTD_ERASE_PENDING 0x01
932394ac WD	19	#define MTD_ERASING 0x02
	20	#define MTD_ERASE_SUSPEND 0x04
	21	#define MTD_ERASE_DONE 0x08
	22	#define MTD_ERASE_FAILED 0x10
	23
8d2effea SR	24	#define MTD_FAIL_ADDR_UNKNOWN -1LL
8d2effea SR	25
d438d508 KP	26	/*
	27	* Enumeration for NAND/OneNAND flash chip state
	28	*/
	29	enum {
	30	FL_READY,
	31	FL_READING,
	32	FL_WRITING,
	33	FL_ERASING,
	34	FL_SYNCING,
	35	FL_CACHEDPRG,
	36	FL_RESETING,
	37	FL_UNLOCKING,
	38	FL_LOCKING,
	39	FL_PM_SUSPENDED,
	40	};
	41
932394ac	42	/* If the erase fails, fail_addr might indicate exactly which block failed. If
8d2effea	43	fail_addr = MTD_FAIL_ADDR_UNKNOWN, the failure was not at the device level or was not
932394ac WD	44	specific to any particular block. */
	45	struct erase_info {
	46	struct mtd_info *mtd;
8d2effea SR	47	uint64_t addr;
	48	uint64_t len;
	49	uint64_t fail_addr;
932394ac WD	50	u_long time;
	51	u_long retries;
	52	u_int dev;
	53	u_int cell;
	54	void (callback) (struct erase_info self);
	55	u_long priv;
	56	u_char state;
	57	struct erase_info *next;
	58	};
	59
	60	struct mtd_erase_region_info {
8d2effea	61	uint64_t offset; /* At which this region starts, from the beginning of the MTD */
932394ac WD	62	u_int32_t erasesize; /* For this region */
932394ac WD	63	u_int32_t numblocks; /* Number of blocks of erasesize in this region */
cfa460ad WJ	64	unsigned long lockmap; / If keeping bitmap of locks */
	65	};
	66
	67	/*
	68	* oob operation modes
	69	*
	70	* MTD_OOB_PLACE: oob data are placed at the given offset
	71	* MTD_OOB_AUTO: oob data are automatically placed at the free areas
	72	* which are defined by the ecclayout
	73	* MTD_OOB_RAW: mode to read raw data+oob in one chunk. The oob data
	74	* is inserted into the data. Thats a raw image of the
	75	* flash contents.
	76	*/
	77	typedef enum {
	78	MTD_OOB_PLACE,
	79	MTD_OOB_AUTO,
	80	MTD_OOB_RAW,
	81	} mtd_oob_mode_t;
	82
	83	/**
	84	* struct mtd_oob_ops - oob operation operands
	85	* @mode: operation mode
	86	*
	87	* @len: number of data bytes to write/read
	88	*
	89	* @retlen: number of data bytes written/read
	90	*
	91	* @ooblen: number of oob bytes to write/read
	92	* @oobretlen: number of oob bytes written/read
	93	* @ooboffs: offset of oob data in the oob area (only relevant when
	94	* mode = MTD_OOB_PLACE)
	95	* @datbuf: data buffer - if NULL only oob data are read/written
	96	* @oobbuf: oob data buffer
	97	*
	98	* Note, it is allowed to read more then one OOB area at one go, but not write.
	99	* The interface assumes that the OOB write requests program only one page's
	100	* OOB area.
	101	*/
	102	struct mtd_oob_ops {
	103	mtd_oob_mode_t mode;
	104	size_t len;
	105	size_t retlen;
	106	size_t ooblen;
	107	size_t oobretlen;
	108	uint32_t ooboffs;
	109	uint8_t *datbuf;
	110	uint8_t *oobbuf;
932394ac WD	111	};
	112
	113	struct mtd_info {
	114	u_char type;
	115	u_int32_t flags;
8d2effea	116	uint64_t size; // Total size of the MTD
932394ac	117
cfa460ad	118	/* "Major" erase size for the device. Naïve users may take this
932394ac WD	119	* to be the only erase size available, or may use the more detailed
	120	* information below if they desire
	121	*/
	122	u_int32_t erasesize;
cfa460ad WJ	123	/* Minimal writable flash unit size. In case of NOR flash it is 1 (even
	124	* though individual bits can be cleared), in case of NAND flash it is
	125	* one NAND page (or half, or one-fourths of it), in case of ECC-ed NOR
	126	* it is of ECC block size, etc. It is illegal to have writesize = 0.
	127	* Any driver registering a struct mtd_info must ensure a writesize of
	128	* 1 or larger.
	129	*/
	130	u_int32_t writesize;
932394ac	131
4b070809 WD	132	u_int32_t oobsize; /* Amount of OOB data per block (e.g. 16) */
4b070809 WD	133	u_int32_t oobavail; /* Available OOB bytes per block */
ac7eb8a3	134
4b070809	135	/* Kernel-only stuff starts here. */
c45912d8	136	const char *name;
932394ac WD	137	int index;
932394ac WD	138
cfa460ad WJ	139	/* ecc layout structure pointer - read only ! */
cfa460ad WJ	140	struct nand_ecclayout *ecclayout;
932394ac WD	141
932394ac WD	142	/* Data for variable erase regions. If numeraseregions is zero,
ac7eb8a3	143	* it means that the whole device has erasesize as given above.
932394ac WD	144	*/
932394ac WD	145	int numeraseregions;
ac7eb8a3	146	struct mtd_erase_region_info *eraseregions;
932394ac	147
c45912d8 SW	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	*/
932394ac WD	155	int (erase) (struct mtd_info mtd, struct erase_info *instr);
	156
	157	/* This stuff for eXecute-In-Place */
c45912d8 SW	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, phys_addr_t phys);
932394ac WD	161
932394ac WD	162	/* We probably shouldn't allow XIP if the unpoint isn't a NULL */
c45912d8	163	void (unpoint) (struct mtd_info mtd, loff_t from, size_t len);
932394ac WD	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
c45912d8 SW	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
cfa460ad WJ	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);
932394ac	182
ac7eb8a3 WD	183	/*
ac7eb8a3 WD	184	* Methods to access the protection register area, present in some
932394ac	185	* flash devices. The user data is one time programmable but the
ac7eb8a3	186	* factory data is read only.
932394ac	187	*/
cfa460ad	188	int (get_fact_prot_info) (struct mtd_info mtd, struct otp_info *buf, size_t len);
932394ac	189	int (read_fact_prot_reg) (struct mtd_info mtd, loff_t from, size_t len, size_t retlen, u_char buf);
cfa460ad WJ	190	int (get_user_prot_info) (struct mtd_info mtd, struct otp_info *buf, size_t len);
cfa460ad WJ	191	int (read_user_prot_reg) (struct mtd_info mtd, loff_t from, size_t len, size_t retlen, u_char buf);
932394ac	192	int (write_user_prot_reg) (struct mtd_info mtd, loff_t from, size_t len, size_t retlen, u_char buf);
cfa460ad WJ	193	int (lock_user_prot_reg) (struct mtd_info mtd, loff_t from, size_t len);
	194
	195	/* XXX U-BOOT XXX */
932394ac	196	#if 0
cfa460ad	197	/* kvec-based read/write methods.
ac7eb8a3	198	NB: The 'count' parameter is the number of _vectors_, each of
932394ac WD	199	which contains an (ofs, len) tuple.
932394ac WD	200	*/
932394ac	201	int (writev) (struct mtd_info mtd, const struct kvec vecs, unsigned long count, loff_t to, size_t retlen);
932394ac	202	#endif
cfa460ad	203
932394ac WD	204	/* Sync */
932394ac WD	205	void (sync) (struct mtd_info mtd);
cfa460ad	206
932394ac	207	/* Chip-supported device locking */
8d2effea SR	208	int (lock) (struct mtd_info mtd, loff_t ofs, uint64_t len);
8d2effea SR	209	int (unlock) (struct mtd_info mtd, loff_t ofs, uint64_t len);
932394ac WD	210
	211	/* Power Management functions */
	212	int (suspend) (struct mtd_info mtd);
	213	void (resume) (struct mtd_info mtd);
cfa460ad	214
932394ac WD	215	/* Bad block management functions */
	216	int (block_isbad) (struct mtd_info mtd, loff_t ofs);
	217	int (block_markbad) (struct mtd_info mtd, loff_t ofs);
	218
cfa460ad WJ	219	/* XXX U-BOOT XXX */
	220	#if 0
	221	struct notifier_block reboot_notifier; /* default mode before reboot */
	222	#endif
	223
	224	/* ECC status information */
	225	struct mtd_ecc_stats ecc_stats;
	226	/* Subpage shift (NAND) */
	227	int subpage_sft;
	228
932394ac WD	229	void *priv;
	230
	231	struct module *owner;
	232	int usecount;
cfa460ad WJ	233
	234	/* If the driver is something smart, like UBI, it may need to maintain
	235	* its own reference counting. The below functions are only for driver.
	236	* The driver may register its callbacks. These callbacks are not
	237	* supposed to be called by MTD users */
	238	int (get_device) (struct mtd_info mtd);
	239	void (put_device) (struct mtd_info mtd);
932394ac WD	240	};
932394ac WD	241
8d2effea SR	242	static inline uint32_t mtd_div_by_eb(uint64_t sz, struct mtd_info *mtd)
	243	{
	244	do_div(sz, mtd->erasesize);
	245	return sz;
	246	}
	247
	248	static inline uint32_t mtd_mod_by_eb(uint64_t sz, struct mtd_info *mtd)
	249	{
	250	return do_div(sz, mtd->erasesize);
	251	}
932394ac WD	252
	253	/* Kernel-side ioctl definitions */
	254
	255	extern int add_mtd_device(struct mtd_info *mtd);
	256	extern int del_mtd_device (struct mtd_info *mtd);
	257
	258	extern struct mtd_info get_mtd_device(struct mtd_info mtd, int num);
cfa460ad	259	extern struct mtd_info get_mtd_device_nm(const char name);
932394ac WD	260
	261	extern void put_mtd_device(struct mtd_info *mtd);
	262
cfa460ad	263	/* XXX U-BOOT XXX */
932394ac WD	264	#if 0
	265	struct mtd_notifier {
	266	void (add)(struct mtd_info mtd);
	267	void (remove)(struct mtd_info mtd);
	268	struct list_head list;
	269	};
	270
932394ac WD	271	extern void register_mtd_user (struct mtd_notifier *new);
	272	extern int unregister_mtd_user (struct mtd_notifier *old);
	273
	274	int default_mtd_writev(struct mtd_info mtd, const struct kvec vecs,
	275	unsigned long count, loff_t to, size_t *retlen);
	276
	277	int default_mtd_readv(struct mtd_info mtd, struct kvec vecs,
	278	unsigned long count, loff_t from, size_t *retlen);
	279	#endif
	280
932394ac WD	281	#ifdef CONFIG_MTD_PARTITIONS
	282	void mtd_erase_callback(struct erase_info *instr);
	283	#else
	284	static inline void mtd_erase_callback(struct erase_info *instr)
	285	{
	286	if (instr->callback)
	287	instr->callback(instr);
	288	}
	289	#endif
	290
	291	/*
	292	* Debugging macro and defines
	293	*/
	294	#define MTD_DEBUG_LEVEL0 (0) /* Quiet */
	295	#define MTD_DEBUG_LEVEL1 (1) /* Audible */
	296	#define MTD_DEBUG_LEVEL2 (2) /* Loud */
	297	#define MTD_DEBUG_LEVEL3 (3) /* Noisy */
	298
	299	#ifdef CONFIG_MTD_DEBUG
3167c538	300	#define MTDDEBUG(n, args...) \
53677ef1	301	do { \
932394ac WD	302	if (n <= CONFIG_MTD_DEBUG_VERBOSE) \
	303	printk(KERN_INFO args); \
	304	} while(0)
	305	#else /* CONFIG_MTD_DEBUG */
c45912d8 SW	306	#define MTDDEBUG(n, args...) \
	307	do { \
	308	if (0) \
	309	printk(KERN_INFO args); \
	310	} while(0)
932394ac WD	311	#endif /* CONFIG_MTD_DEBUG */
	312
	313	#endif /* __MTD_MTD_H__ */