238 lines
8.1 KiB
C
238 lines
8.1 KiB
C
/*
|
|
* $Id: mtd.h,v 1.61 2005/11/07 11:14:54 gleixner Exp $
|
|
*
|
|
* Copyright (C) 1999-2003 David Woodhouse <dwmw2@infradead.org> et al.
|
|
*
|
|
* Released under GPL
|
|
*/
|
|
|
|
#ifndef __MTD_MTD_H__
|
|
#define __MTD_MTD_H__
|
|
|
|
#ifndef __KERNEL__
|
|
#error This is a kernel header. Perhaps include mtd-user.h instead?
|
|
#endif
|
|
|
|
#include <linux/config.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>
|
|
|
|
#define MTD_CHAR_MAJOR 90
|
|
#define MTD_BLOCK_MAJOR 31
|
|
#define MAX_MTD_DEVICES 16
|
|
|
|
#define MTD_ERASE_PENDING 0x01
|
|
#define MTD_ERASING 0x02
|
|
#define MTD_ERASE_SUSPEND 0x04
|
|
#define MTD_ERASE_DONE 0x08
|
|
#define MTD_ERASE_FAILED 0x10
|
|
|
|
/* If the erase fails, fail_addr might indicate exactly which block failed. If
|
|
fail_addr = 0xffffffff, the failure was not at the device level or was not
|
|
specific to any particular block. */
|
|
struct erase_info {
|
|
struct mtd_info *mtd;
|
|
u_int32_t addr;
|
|
u_int32_t len;
|
|
u_int32_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 {
|
|
u_int32_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 */
|
|
};
|
|
|
|
struct mtd_info {
|
|
u_char type;
|
|
u_int32_t flags;
|
|
u_int32_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;
|
|
|
|
u_int32_t oobblock; // Size of OOB blocks (e.g. 512)
|
|
u_int32_t oobsize; // Amount of OOB data per block (e.g. 16)
|
|
u_int32_t ecctype;
|
|
u_int32_t eccsize;
|
|
|
|
/*
|
|
* Reuse some of the above unused fields in the case of NOR flash
|
|
* with configurable programming regions to avoid modifying the
|
|
* user visible structure layout/size. Only valid when the
|
|
* MTD_PROGRAM_REGIONS flag is set.
|
|
* (Maybe we should have an union for those?)
|
|
*/
|
|
#define MTD_PROGREGION_SIZE(mtd) (mtd)->oobblock
|
|
#define MTD_PROGREGION_CTRLMODE_VALID(mtd) (mtd)->oobsize
|
|
#define MTD_PROGREGION_CTRLMODE_INVALID(mtd) (mtd)->ecctype
|
|
|
|
// Kernel-only stuff starts here.
|
|
char *name;
|
|
int index;
|
|
|
|
// oobinfo is a nand_oobinfo structure, which can be set by iotcl (MEMSETOOBINFO)
|
|
struct nand_oobinfo oobinfo;
|
|
u_int32_t oobavail; // Number of bytes in OOB area available for fs
|
|
|
|
/* 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;
|
|
|
|
/* This really shouldn't be here. It can go away in 2.5 */
|
|
u_int32_t bank_size;
|
|
|
|
int (*erase) (struct mtd_info *mtd, struct erase_info *instr);
|
|
|
|
/* This stuff for eXecute-In-Place */
|
|
int (*point) (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char **mtdbuf);
|
|
|
|
/* We probably shouldn't allow XIP if the unpoint isn't a NULL */
|
|
void (*unpoint) (struct mtd_info *mtd, u_char * addr, 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);
|
|
|
|
int (*read_ecc) (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf, u_char *eccbuf, struct nand_oobinfo *oobsel);
|
|
int (*write_ecc) (struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const u_char *buf, u_char *eccbuf, struct nand_oobinfo *oobsel);
|
|
|
|
int (*read_oob) (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf);
|
|
int (*write_oob) (struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const u_char *buf);
|
|
|
|
/*
|
|
* 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. We need these especially for NAND flash,
|
|
with its limited number of write cycles per erase.
|
|
NB: The 'count' parameter is the number of _vectors_, each of
|
|
which contains an (ofs, len) tuple.
|
|
*/
|
|
int (*readv) (struct mtd_info *mtd, struct kvec *vecs, unsigned long count, loff_t from, size_t *retlen);
|
|
int (*readv_ecc) (struct mtd_info *mtd, struct kvec *vecs, unsigned long count, loff_t from,
|
|
size_t *retlen, u_char *eccbuf, struct nand_oobinfo *oobsel);
|
|
int (*writev) (struct mtd_info *mtd, const struct kvec *vecs, unsigned long count, loff_t to, size_t *retlen);
|
|
int (*writev_ecc) (struct mtd_info *mtd, const struct kvec *vecs, unsigned long count, loff_t to,
|
|
size_t *retlen, u_char *eccbuf, struct nand_oobinfo *oobsel);
|
|
|
|
/* Sync */
|
|
void (*sync) (struct mtd_info *mtd);
|
|
|
|
/* Chip-supported device locking */
|
|
int (*lock) (struct mtd_info *mtd, loff_t ofs, size_t len);
|
|
int (*unlock) (struct mtd_info *mtd, loff_t ofs, size_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 */
|
|
|
|
void *priv;
|
|
|
|
struct module *owner;
|
|
int usecount;
|
|
};
|
|
|
|
|
|
/* 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 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);
|
|
|
|
#define MTD_ERASE(mtd, args...) (*(mtd->erase))(mtd, args)
|
|
#define MTD_POINT(mtd, a,b,c,d) (*(mtd->point))(mtd, a,b,c, (u_char **)(d))
|
|
#define MTD_UNPOINT(mtd, arg) (*(mtd->unpoint))(mtd, (u_char *)arg)
|
|
#define MTD_READ(mtd, args...) (*(mtd->read))(mtd, args)
|
|
#define MTD_WRITE(mtd, args...) (*(mtd->write))(mtd, args)
|
|
#define MTD_READV(mtd, args...) (*(mtd->readv))(mtd, args)
|
|
#define MTD_WRITEV(mtd, args...) (*(mtd->writev))(mtd, args)
|
|
#define MTD_READECC(mtd, args...) (*(mtd->read_ecc))(mtd, args)
|
|
#define MTD_WRITEECC(mtd, args...) (*(mtd->write_ecc))(mtd, args)
|
|
#define MTD_READOOB(mtd, args...) (*(mtd->read_oob))(mtd, args)
|
|
#define MTD_WRITEOOB(mtd, args...) (*(mtd->write_oob))(mtd, args)
|
|
#define MTD_SYNC(mtd) do { if (mtd->sync) (*(mtd->sync))(mtd); } while (0)
|
|
|
|
|
|
#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 { } while(0)
|
|
|
|
#endif /* CONFIG_MTD_DEBUG */
|
|
|
|
#endif /* __MTD_MTD_H__ */
|