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[MTD] NAND modularize write function 

Modularize the write function and reorganaize the internal buffer
management. Remove obsolete chip options and fixup all affected
users.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Thomas Gleixner 2006-05-26 18:52:08 +02:00
parent e4d222ff18
commit f75e5097ef
7 changed files with 334 additions and 574 deletions
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2
drivers/mtd/nand/diskonchip.c
View File

@ -1666,7 +1666,7 @@ static int __init doc_probe(unsigned long physadr)
nand->ecc.mode = NAND_ECC_HW_SYNDROME;
nand->ecc.size = 512;
nand->ecc.bytes = 6;
nand->options = NAND_USE_FLASH_BBT | NAND_HWECC_SYNDROME;
nand->options = NAND_USE_FLASH_BBT;
doc->physadr = physadr;
doc->virtadr = virtadr;

3
drivers/mtd/nand/edb7312.c
View File

@ -198,9 +198,6 @@ static void __exit ep7312_cleanup(void)
/* Release resources, unregister device */
nand_release(ap7312_mtd);
/* Free internal data buffer */
kfree(this->data_buf);
/* Free the MTD device structure */
kfree(ep7312_mtd);
}

827
drivers/mtd/nand/nand_base.c
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File diff suppressed because it is too large Load Diff

2
drivers/mtd/nand/nand_bbt.c
View File

@ -666,7 +666,7 @@ static inline int nand_memory_bbt(struct mtd_info *mtd, struct nand_bbt_descr *b
struct nand_chip *this = mtd->priv;
bd->options &= ~NAND_BBT_SCANEMPTY;
return create_bbt(mtd, this->data_buf, bd, -1);
return create_bbt(mtd, this->buffers.databuf, bd, -1);
}
/**

1
drivers/mtd/nand/rtc_from4.c
View File

@ -571,7 +571,6 @@ static int __init rtc_from4_init(void)
this->ecc.mode = NAND_ECC_HW_SYNDROME;
this->ecc.size = 512;
this->ecc.bytes = 8;
this->options |= NAND_HWECC_SYNDROME;
/* return the status of extra status and ECC checks */
this->errstat = rtc_from4_errstat;
/* set the nand_oobinfo to support FPGA H/W error detection */

2
drivers/mtd/nand/toto.c
View File

@ -175,8 +175,6 @@ static int __init toto_init(void)
goto out;
out_buf:
kfree(this->data_buf);
out_mtd:
kfree(toto_mtd);
out:

71
include/linux/mtd/nand.h
View File

@ -37,7 +37,7 @@ extern int nand_read_raw (struct mtd_info *mtd, uint8_t *buf, loff_t from,
extern int nand_write_raw(struct mtd_info *mtd, loff_t to, size_t len,
size_t *retlen, uint8_t *buf, uint8_t *oob);
size_t *retlen, const uint8_t *buf, uint8_t *oob);
/* The maximum number of NAND chips in an array */
#define NAND_MAX_CHIPS 8
@ -47,6 +47,7 @@ extern int nand_write_raw(struct mtd_info *mtd, loff_t to, size_t len,
* adjust this accordingly.
*/
#define NAND_MAX_OOBSIZE 64
#define NAND_MAX_PAGESIZE 2048
/*
* Constants for hardware specific CLE/ALE/NCE function
@ -181,20 +182,12 @@ typedef enum {
/* Use a flash based bad block table. This option is passed to the
* default bad block table function. */
#define NAND_USE_FLASH_BBT 0x00010000
/* The hw ecc generator provides a syndrome instead a ecc value on read
* This can only work if we have the ecc bytes directly behind the
* data bytes. Applies for DOC and AG-AND Renesas HW Reed Solomon generators */
#define NAND_HWECC_SYNDROME 0x00020000
/* This option skips the bbt scan during initialization. */
#define NAND_SKIP_BBTSCAN 0x00040000
#define NAND_SKIP_BBTSCAN 0x00020000
/* Options set by nand scan */
/* Nand scan has allocated controller struct */
#define NAND_CONTROLLER_ALLOC 0x20000000
/* Nand scan has allocated oob_buf */
#define NAND_OOBBUF_ALLOC 0x40000000
/* Nand scan has allocated data_buf */
#define NAND_DATABUF_ALLOC 0x80000000
#define NAND_CONTROLLER_ALLOC 0x80000000
/*
@ -240,6 +233,7 @@ struct nand_hw_control {
* be provided if an hardware ECC is available
* @calculate: function for ecc calculation or readback from ecc hardware
* @correct: function for ecc correction, matching to ecc generator (sw/hw)
* @read_page: function to read a page according to the ecc generator requirements
* @write_page: function to write a page according to the ecc generator requirements
*/
struct nand_ecc_ctrl {
@ -260,9 +254,28 @@ struct nand_ecc_ctrl {
int (*read_page)(struct mtd_info *mtd,
struct nand_chip *chip,
uint8_t *buf);
int (*write_page)(struct mtd_info *mtd,
void (*write_page)(struct mtd_info *mtd,
struct nand_chip *chip,
uint8_t *buf, int cached);
const uint8_t *buf);
};
/**
* struct nand_buffers - buffer structure for read/write
* @ecccalc: buffer for calculated ecc
* @ecccode: buffer for ecc read from flash
* @oobwbuf: buffer for write oob data
* @databuf: buffer for data - dynamically sized
* @oobrbuf: buffer to read oob data
*
* Do not change the order of buffers. databuf and oobrbuf must be in
* consecutive order.
*/
struct nand_buffers {
uint8_t ecccalc[NAND_MAX_OOBSIZE];
uint8_t ecccode[NAND_MAX_OOBSIZE];
uint8_t oobwbuf[NAND_MAX_OOBSIZE];
uint8_t databuf[NAND_MAX_PAGESIZE];
uint8_t oobrbuf[NAND_MAX_OOBSIZE];
};
/**
@ -294,8 +307,8 @@ struct nand_ecc_ctrl {
* @phys_erase_shift: [INTERN] number of address bits in a physical eraseblock
* @bbt_erase_shift: [INTERN] number of address bits in a bbt entry
* @chip_shift: [INTERN] number of address bits in one chip
* @data_buf: [INTERN] internal buffer for one page + oob
* @oob_buf: [INTERN] oob buffer for one eraseblock
* @datbuf: [INTERN] internal buffer for one page + oob
* @oobbuf: [INTERN] oob buffer for one eraseblock
* @oobdirty: [INTERN] indicates that oob_buf must be reinitialized
* @data_poi: [INTERN] pointer to a data buffer
* @options: [BOARDSPECIFIC] various chip options. They can partly be set to inform nand_scan about
@ -336,32 +349,38 @@ struct nand_chip {
int (*waitfunc)(struct mtd_info *mtd, struct nand_chip *this, int state);
void (*erase_cmd)(struct mtd_info *mtd, int page);
int (*scan_bbt)(struct mtd_info *mtd);
struct nand_ecc_ctrl ecc;
int (*errstat)(struct mtd_info *mtd, struct nand_chip *this, int state, int status, int page);
int chip_delay;
wait_queue_head_t wq;
nand_state_t state;
unsigned int options;
int page_shift;
int phys_erase_shift;
int bbt_erase_shift;
int chip_shift;
uint8_t *data_buf;
uint8_t *oob_buf;
int oobdirty;
uint8_t *data_poi;
unsigned int options;
int badblockpos;
int numchips;
unsigned long chipsize;
int pagemask;
int pagebuf;
int badblockpos;
nand_state_t state;
uint8_t *oob_poi;
struct nand_hw_control *controller;
struct nand_oobinfo *autooob;
struct nand_ecc_ctrl ecc;
struct nand_buffers buffers;
struct nand_hw_control hwcontrol;
uint8_t *bbt;
struct nand_bbt_descr *bbt_td;
struct nand_bbt_descr *bbt_md;
struct nand_bbt_descr *badblock_pattern;
struct nand_hw_control *controller;
void *priv;
int (*errstat)(struct mtd_info *mtd, struct nand_chip *this, int state, int status, int page);
};
/*