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Merge branch 'master' of git://git.infradead.org/~kmpark/onenand-mtd-2.6

This commit is contained in:
David Woodhouse 2007-02-09 12:36:22 +00:00
parent 552a8278d0 cde36b37d6
commit c1f1625860
5 changed files with 448 additions and 184 deletions
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576
drivers/mtd/onenand/onenand_base.c
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@ -1,7 +1,7 @@
/*
* linux/drivers/mtd/onenand/onenand_base.c
*
* Copyright (C) 2005-2006 Samsung Electronics
* Copyright (C) 2005-2007 Samsung Electronics
* Kyungmin Park <kyungmin.park@samsung.com>
*
* This program is free software; you can redistribute it and/or modify
@ -94,16 +94,9 @@ static void onenand_writew(unsigned short value, void __iomem *addr)
*/
static int onenand_block_address(struct onenand_chip *this, int block)
{
if (this->device_id & ONENAND_DEVICE_IS_DDP) {
/* Device Flash Core select, NAND Flash Block Address */
int dfs = 0;
if (block & this->density_mask)
dfs = 1;
return (dfs << ONENAND_DDP_SHIFT) |
(block & (this->density_mask - 1));
}
/* Device Flash Core select, NAND Flash Block Address */
if (block & this->density_mask)
return ONENAND_DDP_CHIP1 | (block ^ this->density_mask);
return block;
}
@ -118,17 +111,11 @@ static int onenand_block_address(struct onenand_chip *this, int block)
*/
static int onenand_bufferram_address(struct onenand_chip *this, int block)
{
if (this->device_id & ONENAND_DEVICE_IS_DDP) {
/* Device BufferRAM Select */
int dbs = 0;
/* Device BufferRAM Select */
if (block & this->density_mask)
return ONENAND_DDP_CHIP1;
if (block & this->density_mask)
dbs = 1;
return (dbs << ONENAND_DDP_SHIFT);
}
return 0;
return ONENAND_DDP_CHIP0;
}
/**
@ -317,22 +304,25 @@ static int onenand_wait(struct mtd_info *mtd, int state)
ctrl = this->read_word(this->base + ONENAND_REG_CTRL_STATUS);
if (ctrl & ONENAND_CTRL_ERROR) {
DEBUG(MTD_DEBUG_LEVEL0, "onenand_wait: controller error = 0x%04x\n", ctrl);
printk(KERN_ERR "onenand_wait: controller error = 0x%04x\n", ctrl);
if (ctrl & ONENAND_CTRL_LOCK)
DEBUG(MTD_DEBUG_LEVEL0, "onenand_wait: it's locked error.\n");
printk(KERN_ERR "onenand_wait: it's locked error.\n");
return ctrl;
}
if (interrupt & ONENAND_INT_READ) {
int ecc = this->read_word(this->base + ONENAND_REG_ECC_STATUS);
if (ecc) {
DEBUG(MTD_DEBUG_LEVEL0, "onenand_wait: ECC error = 0x%04x\n", ecc);
printk(KERN_ERR "onenand_wait: ECC error = 0x%04x\n", ecc);
if (ecc & ONENAND_ECC_2BIT_ALL) {
mtd->ecc_stats.failed++;
return ecc;
} else if (ecc & ONENAND_ECC_1BIT_ALL)
mtd->ecc_stats.corrected++;
}
} else if (state == FL_READING) {
printk(KERN_ERR "onenand_wait: read timeout! ctrl=0x%04x intr=0x%04x\n", ctrl, interrupt);
return -EIO;
}
return 0;
@ -587,22 +577,32 @@ static int onenand_write_bufferram(struct mtd_info *mtd, int area,
static int onenand_check_bufferram(struct mtd_info *mtd, loff_t addr)
{
struct onenand_chip *this = mtd->priv;
int block, page;
int i;
int blockpage, found = 0;
unsigned int i;
block = (int) (addr >> this->erase_shift);
page = (int) (addr >> this->page_shift);
page &= this->page_mask;
i = ONENAND_CURRENT_BUFFERRAM(this);
blockpage = (int) (addr >> this->page_shift);
/* Is there valid data? */
if (this->bufferram[i].block == block &&
this->bufferram[i].page == page &&
this->bufferram[i].valid)
return 1;
i = ONENAND_CURRENT_BUFFERRAM(this);
if (this->bufferram[i].blockpage == blockpage)
found = 1;
else {
/* Check another BufferRAM */
i = ONENAND_NEXT_BUFFERRAM(this);
if (this->bufferram[i].blockpage == blockpage) {
ONENAND_SET_NEXT_BUFFERRAM(this);
found = 1;
}
}
return 0;
if (found && ONENAND_IS_DDP(this)) {
/* Select DataRAM for DDP */
int block = (int) (addr >> this->erase_shift);
int value = onenand_bufferram_address(this, block);
this->write_word(value, this->base + ONENAND_REG_START_ADDRESS2);
}
return found;
}
/**
@ -613,31 +613,26 @@ static int onenand_check_bufferram(struct mtd_info *mtd, loff_t addr)
*
* Update BufferRAM information
*/
static int onenand_update_bufferram(struct mtd_info *mtd, loff_t addr,
static void onenand_update_bufferram(struct mtd_info *mtd, loff_t addr,
int valid)
{
struct onenand_chip *this = mtd->priv;
int block, page;
int i;
int blockpage;
unsigned int i;
block = (int) (addr >> this->erase_shift);
page = (int) (addr >> this->page_shift);
page &= this->page_mask;
blockpage = (int) (addr >> this->page_shift);
/* Invalidate BufferRAM */
for (i = 0; i < MAX_BUFFERRAM; i++) {
if (this->bufferram[i].block == block &&
this->bufferram[i].page == page)
this->bufferram[i].valid = 0;
}
/* Invalidate another BufferRAM */
i = ONENAND_NEXT_BUFFERRAM(this);
if (this->bufferram[i].blockpage == blockpage)
this->bufferram[i].blockpage = -1;
/* Update BufferRAM */
i = ONENAND_CURRENT_BUFFERRAM(this);
this->bufferram[i].block = block;
this->bufferram[i].page = page;
this->bufferram[i].valid = valid;
return 0;
if (valid)
this->bufferram[i].blockpage = blockpage;
else
this->bufferram[i].blockpage = -1;
}
/**
@ -716,7 +711,7 @@ static int onenand_read(struct mtd_info *mtd, loff_t from, size_t len,
/* Do not allow reads past end of device */
if ((from + len) > mtd->size) {
DEBUG(MTD_DEBUG_LEVEL0, "onenand_read: Attempt read beyond end of device\n");
printk(KERN_ERR "onenand_read: Attempt read beyond end of device\n");
*retlen = 0;
return -EINVAL;
}
@ -724,8 +719,6 @@ static int onenand_read(struct mtd_info *mtd, loff_t from, size_t len,
/* Grab the lock and see if the device is available */
onenand_get_device(mtd, FL_READING);
/* TODO handling oob */
stats = mtd->ecc_stats;
/* Read-while-load method */
@ -754,9 +747,9 @@ static int onenand_read(struct mtd_info *mtd, loff_t from, size_t len,
* Now we issued chip 1 read and pointed chip 1
* bufferam so we have to point chip 0 bufferam.
*/
if (this->device_id & ONENAND_DEVICE_IS_DDP &&
unlikely(from == (this->chipsize >> 1))) {
this->write_word(0, this->base + ONENAND_REG_START_ADDRESS2);
if (ONENAND_IS_DDP(this) &&
unlikely(from == (this->chipsize >> 1))) {
this->write_word(ONENAND_DDP_CHIP0, this->base + ONENAND_REG_START_ADDRESS2);
boundary = 1;
} else
boundary = 0;
@ -770,7 +763,7 @@ static int onenand_read(struct mtd_info *mtd, loff_t from, size_t len,
break;
/* Set up for next read from bufferRAM */
if (unlikely(boundary))
this->write_word(0x8000, this->base + ONENAND_REG_START_ADDRESS2);
this->write_word(ONENAND_DDP_CHIP1, this->base + ONENAND_REG_START_ADDRESS2);
ONENAND_SET_NEXT_BUFFERRAM(this);
buf += thislen;
thislen = min_t(int, mtd->writesize, len - read);
@ -800,6 +793,44 @@ static int onenand_read(struct mtd_info *mtd, loff_t from, size_t len,
return mtd->ecc_stats.corrected - stats.corrected ? -EUCLEAN : 0;
}
/**
* onenand_transfer_auto_oob - [Internal] oob auto-placement transfer
* @param mtd MTD device structure
* @param buf destination address
* @param column oob offset to read from
* @param thislen oob length to read
*/
static int onenand_transfer_auto_oob(struct mtd_info *mtd, uint8_t *buf, int column,
int thislen)
{
struct onenand_chip *this = mtd->priv;
struct nand_oobfree *free;
int readcol = column;
int readend = column + thislen;
int lastgap = 0;
uint8_t *oob_buf = this->page_buf + mtd->writesize;
for (free = this->ecclayout->oobfree; free->length; ++free) {
if (readcol >= lastgap)
readcol += free->offset - lastgap;
if (readend >= lastgap)
readend += free->offset - lastgap;
lastgap = free->offset + free->length;
}
this->read_bufferram(mtd, ONENAND_SPARERAM, oob_buf, 0, mtd->oobsize);
for (free = this->ecclayout->oobfree; free->length; ++free) {
int free_end = free->offset + free->length;
if (free->offset < readend && free_end > readcol) {
int st = max_t(int,free->offset,readcol);
int ed = min_t(int,free_end,readend);
int n = ed - st;
memcpy(buf, oob_buf + st, n);
buf += n;
}
}
return 0;
}
/**
* onenand_do_read_oob - [MTD Interface] OneNAND read out-of-band
* @param mtd MTD device structure
@ -807,14 +838,15 @@ static int onenand_read(struct mtd_info *mtd, loff_t from, size_t len,
* @param len number of bytes to read
* @param retlen pointer to variable to store the number of read bytes
* @param buf the databuffer to put data
* @param mode operation mode
*
* OneNAND read out-of-band data from the spare area
*/
int onenand_do_read_oob(struct mtd_info *mtd, loff_t from, size_t len,
size_t *retlen, u_char *buf)
static int onenand_do_read_oob(struct mtd_info *mtd, loff_t from, size_t len,
size_t *retlen, u_char *buf, mtd_oob_mode_t mode)
{
struct onenand_chip *this = mtd->priv;
int read = 0, thislen, column;
int read = 0, thislen, column, oobsize;
int ret = 0;
DEBUG(MTD_DEBUG_LEVEL3, "onenand_read_oob: from = 0x%08x, len = %i\n", (unsigned int) from, (int) len);
@ -822,21 +854,33 @@ int onenand_do_read_oob(struct mtd_info *mtd, loff_t from, size_t len,
/* Initialize return length value */
*retlen = 0;
if (mode == MTD_OOB_AUTO)
oobsize = this->ecclayout->oobavail;
else
oobsize = mtd->oobsize;
column = from & (mtd->oobsize - 1);
if (unlikely(column >= oobsize)) {
printk(KERN_ERR "onenand_read_oob: Attempted to start read outside oob\n");
return -EINVAL;
}
/* Do not allow reads past end of device */
if (unlikely((from + len) > mtd->size)) {
DEBUG(MTD_DEBUG_LEVEL0, "onenand_read_oob: Attempt read beyond end of device\n");
if (unlikely(from >= mtd->size ||
column + len > ((mtd->size >> this->page_shift) -
(from >> this->page_shift)) * oobsize)) {
printk(KERN_ERR "onenand_read_oob: Attempted to read beyond end of device\n");
return -EINVAL;
}
/* Grab the lock and see if the device is available */
onenand_get_device(mtd, FL_READING);
column = from & (mtd->oobsize - 1);
while (read < len) {
cond_resched();
thislen = mtd->oobsize - column;
thislen = oobsize - column;
thislen = min_t(int, thislen, len);
this->command(mtd, ONENAND_CMD_READOOB, from, mtd->oobsize);
@ -846,11 +890,14 @@ int onenand_do_read_oob(struct mtd_info *mtd, loff_t from, size_t len,
ret = this->wait(mtd, FL_READING);
/* First copy data and check return value for ECC handling */
this->read_bufferram(mtd, ONENAND_SPARERAM, buf, column, thislen);
if (mode == MTD_OOB_AUTO)
onenand_transfer_auto_oob(mtd, buf, column, thislen);
else
this->read_bufferram(mtd, ONENAND_SPARERAM, buf, column, thislen);
if (ret) {
DEBUG(MTD_DEBUG_LEVEL0, "onenand_read_oob: read failed = 0x%x\n", ret);
goto out;
printk(KERN_ERR "onenand_read_oob: read failed = 0x%x\n", ret);
break;
}
read += thislen;
@ -868,7 +915,6 @@ int onenand_do_read_oob(struct mtd_info *mtd, loff_t from, size_t len,
}
}
out:
/* Deselect and wake up anyone waiting on the device */
onenand_release_device(mtd);
@ -885,10 +931,132 @@ out:
static int onenand_read_oob(struct mtd_info *mtd, loff_t from,
struct mtd_oob_ops *ops)
{
BUG_ON(ops->mode != MTD_OOB_PLACE);
switch (ops->mode) {
case MTD_OOB_PLACE:
case MTD_OOB_AUTO:
break;
case MTD_OOB_RAW:
/* Not implemented yet */
default:
return -EINVAL;
}
return onenand_do_read_oob(mtd, from + ops->ooboffs, ops->ooblen,
&ops->oobretlen, ops->oobbuf);
&ops->oobretlen, ops->oobbuf, ops->mode);
}
/**
* onenand_bbt_wait - [DEFAULT] wait until the command is done
* @param mtd MTD device structure
* @param state state to select the max. timeout value
*
* Wait for command done.
*/
static int onenand_bbt_wait(struct mtd_info *mtd, int state)
{
struct onenand_chip *this = mtd->priv;
unsigned long timeout;
unsigned int interrupt;
unsigned int ctrl;
/* The 20 msec is enough */
timeout = jiffies + msecs_to_jiffies(20);
while (time_before(jiffies, timeout)) {
interrupt = this->read_word(this->base + ONENAND_REG_INTERRUPT);
if (interrupt & ONENAND_INT_MASTER)
break;
}
/* To get correct interrupt status in timeout case */
interrupt = this->read_word(this->base + ONENAND_REG_INTERRUPT);
ctrl = this->read_word(this->base + ONENAND_REG_CTRL_STATUS);
if (ctrl & ONENAND_CTRL_ERROR) {
printk(KERN_DEBUG "onenand_bbt_wait: controller error = 0x%04x\n", ctrl);
/* Initial bad block case */
if (ctrl & ONENAND_CTRL_LOAD)
return ONENAND_BBT_READ_ERROR;
return ONENAND_BBT_READ_FATAL_ERROR;
}
if (interrupt & ONENAND_INT_READ) {
int ecc = this->read_word(this->base + ONENAND_REG_ECC_STATUS);
if (ecc & ONENAND_ECC_2BIT_ALL)
return ONENAND_BBT_READ_ERROR;
} else {
printk(KERN_ERR "onenand_bbt_wait: read timeout!"
"ctrl=0x%04x intr=0x%04x\n", ctrl, interrupt);
return ONENAND_BBT_READ_FATAL_ERROR;
}
return 0;
}
/**
* onenand_bbt_read_oob - [MTD Interface] OneNAND read out-of-band for bbt scan
* @param mtd MTD device structure
* @param from offset to read from
* @param @ops oob operation description structure
*
* OneNAND read out-of-band data from the spare area for bbt scan
*/
int onenand_bbt_read_oob(struct mtd_info *mtd, loff_t from,
struct mtd_oob_ops *ops)
{
struct onenand_chip *this = mtd->priv;
int read = 0, thislen, column;
int ret = 0;
size_t len = ops->ooblen;
u_char *buf = ops->oobbuf;
DEBUG(MTD_DEBUG_LEVEL3, "onenand_bbt_read_oob: from = 0x%08x, len = %i\n", (unsigned int) from, len);
/* Initialize return value */
ops->oobretlen = 0;
/* Do not allow reads past end of device */
if (unlikely((from + len) > mtd->size)) {
printk(KERN_ERR "onenand_bbt_read_oob: Attempt read beyond end of device\n");
return ONENAND_BBT_READ_FATAL_ERROR;
}
/* Grab the lock and see if the device is available */
onenand_get_device(mtd, FL_READING);
column = from & (mtd->oobsize - 1);
while (read < len) {
cond_resched();
thislen = mtd->oobsize - column;
thislen = min_t(int, thislen, len);
this->command(mtd, ONENAND_CMD_READOOB, from, mtd->oobsize);
onenand_update_bufferram(mtd, from, 0);
ret = onenand_bbt_wait(mtd, FL_READING);
if (ret)
break;
this->read_bufferram(mtd, ONENAND_SPARERAM, buf, column, thislen);
read += thislen;
if (read == len)
break;
buf += thislen;
/* Read more? */
if (read < len) {
/* Update Page size */
from += mtd->writesize;
column = 0;
}
}
/* Deselect and wake up anyone waiting on the device */
onenand_release_device(mtd);
ops->oobretlen = read;
return ret;
}
#ifdef CONFIG_MTD_ONENAND_VERIFY_WRITE
@ -897,14 +1065,12 @@ static int onenand_read_oob(struct mtd_info *mtd, loff_t from,
* @param mtd MTD device structure
* @param buf the databuffer to verify
* @param to offset to read from
* @param len number of bytes to read and compare
*
*/
static int onenand_verify_oob(struct mtd_info *mtd, const u_char *buf, loff_t to, int len)
static int onenand_verify_oob(struct mtd_info *mtd, const u_char *buf, loff_t to)
{
struct onenand_chip *this = mtd->priv;
char *readp = this->page_buf;
int column = to & (mtd->oobsize - 1);
char *readp = this->page_buf + mtd->writesize;
int status, i;
this->command(mtd, ONENAND_CMD_READOOB, to, mtd->oobsize);
@ -913,9 +1079,8 @@ static int onenand_verify_oob(struct mtd_info *mtd, const u_char *buf, loff_t to
if (status)
return status;
this->read_bufferram(mtd, ONENAND_SPARERAM, readp, column, len);
for(i = 0; i < len; i++)
this->read_bufferram(mtd, ONENAND_SPARERAM, readp, 0, mtd->oobsize);
for(i = 0; i < mtd->oobsize; i++)
if (buf[i] != 0xFF && buf[i] != readp[i])
return -EBADMSG;
@ -923,41 +1088,51 @@ static int onenand_verify_oob(struct mtd_info *mtd, const u_char *buf, loff_t to
}
/**
* onenand_verify_page - [GENERIC] verify the chip contents after a write
* @param mtd MTD device structure
* @param buf the databuffer to verify
* onenand_verify - [GENERIC] verify the chip contents after a write
* @param mtd MTD device structure
* @param buf the databuffer to verify
* @param addr offset to read from
* @param len number of bytes to read and compare
*
* Check DataRAM area directly
*/
static int onenand_verify_page(struct mtd_info *mtd, u_char *buf, loff_t addr)
static int onenand_verify(struct mtd_info *mtd, const u_char *buf, loff_t addr, size_t len)
{
struct onenand_chip *this = mtd->priv;
void __iomem *dataram0, *dataram1;
void __iomem *dataram;
int ret = 0;
int thislen, column;
/* In partial page write, just skip it */
if ((addr & (mtd->writesize - 1)) != 0)
return 0;
while (len != 0) {
thislen = min_t(int, mtd->writesize, len);
column = addr & (mtd->writesize - 1);
if (column + thislen > mtd->writesize)
thislen = mtd->writesize - column;
this->command(mtd, ONENAND_CMD_READ, addr, mtd->writesize);
this->command(mtd, ONENAND_CMD_READ, addr, mtd->writesize);
ret = this->wait(mtd, FL_READING);
if (ret)
return ret;
onenand_update_bufferram(mtd, addr, 0);
onenand_update_bufferram(mtd, addr, 1);
ret = this->wait(mtd, FL_READING);
if (ret)
return ret;
/* Check, if the two dataram areas are same */
dataram0 = this->base + ONENAND_DATARAM;
dataram1 = dataram0 + mtd->writesize;
onenand_update_bufferram(mtd, addr, 1);
if (memcmp(dataram0, dataram1, mtd->writesize))
return -EBADMSG;
dataram = this->base + ONENAND_DATARAM;
dataram += onenand_bufferram_offset(mtd, ONENAND_DATARAM);
if (memcmp(buf, dataram + column, thislen))
return -EBADMSG;
len -= thislen;
buf += thislen;
addr += thislen;
}
return 0;
}
#else
#define onenand_verify_page(...) (0)
#define onenand_verify(...) (0)
#define onenand_verify_oob(...) (0)
#endif
@ -988,60 +1163,57 @@ static int onenand_write(struct mtd_info *mtd, loff_t to, size_t len,
/* Do not allow writes past end of device */
if (unlikely((to + len) > mtd->size)) {
DEBUG(MTD_DEBUG_LEVEL0, "onenand_write: Attempt write to past end of device\n");
printk(KERN_ERR "onenand_write: Attempt write to past end of device\n");
return -EINVAL;
}
/* Reject writes, which are not page aligned */
if (unlikely(NOTALIGNED(to)) || unlikely(NOTALIGNED(len))) {
DEBUG(MTD_DEBUG_LEVEL0, "onenand_write: Attempt to write not page aligned data\n");
printk(KERN_ERR "onenand_write: Attempt to write not page aligned data\n");
return -EINVAL;
}
column = to & (mtd->writesize - 1);
subpage = column || (len & (mtd->writesize - 1));
/* Grab the lock and see if the device is available */
onenand_get_device(mtd, FL_WRITING);
/* Loop until all data write */
while (written < len) {
int bytes = mtd->writesize;
int thislen = min_t(int, bytes, len - written);
int thislen = min_t(int, mtd->writesize - column, len - written);
u_char *wbuf = (u_char *) buf;
cond_resched();
this->command(mtd, ONENAND_CMD_BUFFERRAM, to, bytes);
this->command(mtd, ONENAND_CMD_BUFFERRAM, to, thislen);
/* Partial page write */
subpage = thislen < mtd->writesize;
if (subpage) {
bytes = min_t(int, bytes - column, (int) len);
memset(this->page_buf, 0xff, mtd->writesize);
memcpy(this->page_buf + column, buf, bytes);
memcpy(this->page_buf + column, buf, thislen);
wbuf = this->page_buf;
/* Even though partial write, we need page size */
thislen = mtd->writesize;
}
this->write_bufferram(mtd, ONENAND_DATARAM, wbuf, 0, thislen);
this->write_bufferram(mtd, ONENAND_DATARAM, wbuf, 0, mtd->writesize);
this->write_bufferram(mtd, ONENAND_SPARERAM, ffchars, 0, mtd->oobsize);
this->command(mtd, ONENAND_CMD_PROG, to, mtd->writesize);
/* In partial page write we don't update bufferram */
onenand_update_bufferram(mtd, to, !subpage);
ret = this->wait(mtd, FL_WRITING);
/* In partial page write we don't update bufferram */
onenand_update_bufferram(mtd, to, !ret && !subpage);
if (ret) {
DEBUG(MTD_DEBUG_LEVEL0, "onenand_write: write filaed %d\n", ret);
printk(KERN_ERR "onenand_write: write filaed %d\n", ret);
break;
}
/* Only check verify write turn on */
ret = onenand_verify_page(mtd, (u_char *) wbuf, to);
ret = onenand_verify(mtd, (u_char *) wbuf, to, thislen);
if (ret) {
DEBUG(MTD_DEBUG_LEVEL0, "onenand_write: verify failed %d\n", ret);
printk(KERN_ERR "onenand_write: verify failed %d\n", ret);
break;
}
@ -1063,6 +1235,43 @@ static int onenand_write(struct mtd_info *mtd, loff_t to, size_t len,
return ret;
}
/**
* onenand_fill_auto_oob - [Internal] oob auto-placement transfer
* @param mtd MTD device structure
* @param oob_buf oob buffer
* @param buf source address
* @param column oob offset to write to
* @param thislen oob length to write
*/
static int onenand_fill_auto_oob(struct mtd_info *mtd, u_char *oob_buf,
const u_char *buf, int column, int thislen)
{
struct onenand_chip *this = mtd->priv;
struct nand_oobfree *free;
int writecol = column;
int writeend = column + thislen;
int lastgap = 0;
for (free = this->ecclayout->oobfree; free->length; ++free) {
if (writecol >= lastgap)
writecol += free->offset - lastgap;
if (writeend >= lastgap)
writeend += free->offset - lastgap;
lastgap = free->offset + free->length;
}
for (free = this->ecclayout->oobfree; free->length; ++free) {
int free_end = free->offset + free->length;
if (free->offset < writeend && free_end > writecol) {
int st = max_t(int,free->offset,writecol);
int ed = min_t(int,free_end,writeend);
int n = ed - st;
memcpy(oob_buf + st, buf, n);
buf += n;
}
}
return 0;
}
/**
* onenand_do_write_oob - [Internal] OneNAND write out-of-band
* @param mtd MTD device structure
@ -1070,14 +1279,15 @@ static int onenand_write(struct mtd_info *mtd, loff_t to, size_t len,
* @param len number of bytes to write
* @param retlen pointer to variable to store the number of written bytes
* @param buf the data to write
* @param mode operation mode
*
* OneNAND write out-of-band
*/
static int onenand_do_write_oob(struct mtd_info *mtd, loff_t to, size_t len,
size_t *retlen, const u_char *buf)
size_t *retlen, const u_char *buf, mtd_oob_mode_t mode)
{
struct onenand_chip *this = mtd->priv;
int column, ret = 0;
int column, ret = 0, oobsize;
int written = 0;
DEBUG(MTD_DEBUG_LEVEL3, "onenand_write_oob: to = 0x%08x, len = %i\n", (unsigned int) to, (int) len);
@ -1085,9 +1295,30 @@ static int onenand_do_write_oob(struct mtd_info *mtd, loff_t to, size_t len,
/* Initialize retlen, in case of early exit */
*retlen = 0;
/* Do not allow writes past end of device */
if (unlikely((to + len) > mtd->size)) {
DEBUG(MTD_DEBUG_LEVEL0, "onenand_write_oob: Attempt write to past end of device\n");
if (mode == MTD_OOB_AUTO)
oobsize = this->ecclayout->oobavail;
else
oobsize = mtd->oobsize;
column = to & (mtd->oobsize - 1);
if (unlikely(column >= oobsize)) {
printk(KERN_ERR "onenand_write_oob: Attempted to start write outside oob\n");
return -EINVAL;
}
/* For compatibility with NAND: Do not allow write past end of page */
if (column + len > oobsize) {
printk(KERN_ERR "onenand_write_oob: "
"Attempt to write past end of page\n");
return -EINVAL;
}
/* Do not allow reads past end of device */
if (unlikely(to >= mtd->size ||
column + len > ((mtd->size >> this->page_shift) -
(to >> this->page_shift)) * oobsize)) {
printk(KERN_ERR "onenand_write_oob: Attempted to write past end of device\n");
return -EINVAL;
}
@ -1096,18 +1327,19 @@ static int onenand_do_write_oob(struct mtd_info *mtd, loff_t to, size_t len,
/* Loop until all data write */
while (written < len) {
int thislen = min_t(int, mtd->oobsize, len - written);
int thislen = min_t(int, oobsize, len - written);
cond_resched();
column = to & (mtd->oobsize - 1);
this->command(mtd, ONENAND_CMD_BUFFERRAM, to, mtd->oobsize);
/* We send data to spare ram with oobsize
* to prevent byte access */
memset(this->page_buf, 0xff, mtd->oobsize);
memcpy(this->page_buf + column, buf, thislen);
if (mode == MTD_OOB_AUTO)
onenand_fill_auto_oob(mtd, this->page_buf, buf, column, thislen);
else
memcpy(this->page_buf + column, buf, thislen);
this->write_bufferram(mtd, ONENAND_SPARERAM, this->page_buf, 0, mtd->oobsize);
this->command(mtd, ONENAND_CMD_PROGOOB, to, mtd->oobsize);
@ -1116,26 +1348,25 @@ static int onenand_do_write_oob(struct mtd_info *mtd, loff_t to, size_t len,
ret = this->wait(mtd, FL_WRITING);
if (ret) {
DEBUG(MTD_DEBUG_LEVEL0, "onenand_write_oob: write filaed %d\n", ret);
goto out;
printk(KERN_ERR "onenand_write_oob: write failed %d\n", ret);
break;
}
ret = onenand_verify_oob(mtd, buf, to, thislen);
ret = onenand_verify_oob(mtd, this->page_buf, to);
if (ret) {
DEBUG(MTD_DEBUG_LEVEL0, "onenand_write_oob: verify failed %d\n", ret);
goto out;
printk(KERN_ERR "onenand_write_oob: verify failed %d\n", ret);
break;
}
written += thislen;
if (written == len)
break;
to += thislen;
to += mtd->writesize;
buf += thislen;
column = 0;
}
out:
/* Deselect and wake up anyone waiting on the device */
onenand_release_device(mtd);
@ -1153,10 +1384,17 @@ out:
static int onenand_write_oob(struct mtd_info *mtd, loff_t to,
struct mtd_oob_ops *ops)
{
BUG_ON(ops->mode != MTD_OOB_PLACE);
switch (ops->mode) {
case MTD_OOB_PLACE:
case MTD_OOB_AUTO:
break;
case MTD_OOB_RAW:
/* Not implemented yet */
default:
return -EINVAL;
}
return onenand_do_write_oob(mtd, to + ops->ooboffs, ops->ooblen,
&ops->oobretlen, ops->oobbuf);
&ops->oobretlen, ops->oobbuf, ops->mode);
}
/**
@ -1199,19 +1437,19 @@ static int onenand_erase(struct mtd_info *mtd, struct erase_info *instr)
/* Start address must align on block boundary */
if (unlikely(instr->addr & (block_size - 1))) {
DEBUG(MTD_DEBUG_LEVEL0, "onenand_erase: Unaligned address\n");
printk(KERN_ERR "onenand_erase: Unaligned address\n");
return -EINVAL;
}
/* Length must align on block boundary */
if (unlikely(instr->len & (block_size - 1))) {
DEBUG(MTD_DEBUG_LEVEL0, "onenand_erase: Length not block aligned\n");
printk(KERN_ERR "onenand_erase: Length not block aligned\n");
return -EINVAL;
}
/* Do not allow erase past end of device */
if (unlikely((instr->len + instr->addr) > mtd->size)) {
DEBUG(MTD_DEBUG_LEVEL0, "onenand_erase: Erase past end of device\n");
printk(KERN_ERR "onenand_erase: Erase past end of device\n");
return -EINVAL;
}
@ -1241,7 +1479,7 @@ static int onenand_erase(struct mtd_info *mtd, struct erase_info *instr)
ret = this->wait(mtd, FL_ERASING);
/* Check, if it is write protected */
if (ret) {
DEBUG(MTD_DEBUG_LEVEL0, "onenand_erase: Failed erase, block %d\n", (unsigned) (addr >> this->erase_shift));
printk(KERN_ERR "onenand_erase: Failed erase, block %d\n", (unsigned) (addr >> this->erase_shift));
instr->state = MTD_ERASE_FAILED;
instr->fail_addr = addr;
goto erase_exit;
@ -1322,7 +1560,7 @@ static int onenand_default_block_markbad(struct mtd_info *mtd, loff_t ofs)
/* We write two bytes, so we dont have to mess with 16 bit access */
ofs += mtd->oobsize + (bbm->badblockpos & ~0x01);
return onenand_do_write_oob(mtd, ofs , 2, &retlen, buf);
return onenand_do_write_oob(mtd, ofs , 2, &retlen, buf, MTD_OOB_PLACE);
}
/**
@ -1491,6 +1729,8 @@ static int onenand_unlock_all(struct mtd_info *mtd)
struct onenand_chip *this = mtd->priv;
if (this->options & ONENAND_HAS_UNLOCK_ALL) {
/* Set start block address */
this->write_word(0, this->base + ONENAND_REG_START_BLOCK_ADDRESS);
/* Write unlock command */
this->command(mtd, ONENAND_CMD_UNLOCK_ALL, 0, 0);
@ -1503,13 +1743,10 @@ static int onenand_unlock_all(struct mtd_info *mtd)
continue;
/* Workaround for all block unlock in DDP */
if (this->device_id & ONENAND_DEVICE_IS_DDP) {
loff_t ofs;
size_t len;
if (ONENAND_IS_DDP(this)) {
/* 1st block on another chip */
ofs = this->chipsize >> 1;
len = 1 << this->erase_shift;
loff_t ofs = this->chipsize >> 1;
size_t len = mtd->erasesize;
onenand_unlock(mtd, ofs, len);
}
@ -1617,7 +1854,7 @@ static int do_otp_lock(struct mtd_info *mtd, loff_t from, size_t len,
this->command(mtd, ONENAND_CMD_OTP_ACCESS, 0, 0);
this->wait(mtd, FL_OTPING);
ret = onenand_do_write_oob(mtd, from, len, retlen, buf);
ret = onenand_do_write_oob(mtd, from, len, retlen, buf, MTD_OOB_PLACE);
/* Exit OTP access mode */
this->command(mtd, ONENAND_CMD_RESET, 0, 0);
@ -1823,12 +2060,13 @@ static int onenand_lock_user_prot_reg(struct mtd_info *mtd, loff_t from,
#endif /* CONFIG_MTD_ONENAND_OTP */
/**
* onenand_lock_scheme - Check and set OneNAND lock scheme
* onenand_check_features - Check and set OneNAND features
* @param mtd MTD data structure
*
* Check and set OneNAND lock scheme
* Check and set OneNAND features
* - lock scheme
*/
static void onenand_lock_scheme(struct mtd_info *mtd)
static void onenand_check_features(struct mtd_info *mtd)
{
struct onenand_chip *this = mtd->priv;
unsigned int density, process;
@ -1961,26 +2199,28 @@ static int onenand_probe(struct mtd_info *mtd)
density = dev_id >> ONENAND_DEVICE_DENSITY_SHIFT;
this->chipsize = (16 << density) << 20;
/* Set density mask. it is used for DDP */
this->density_mask = (1 << (density + 6));
if (ONENAND_IS_DDP(this))
this->density_mask = (1 << (density + 6));
else
this->density_mask = 0;
/* OneNAND page size & block size */
/* The data buffer size is equal to page size */
mtd->writesize = this->read_word(this->base + ONENAND_REG_DATA_BUFFER_SIZE);
mtd->oobsize = mtd->writesize >> 5;
/* Pagers per block is always 64 in OneNAND */
/* Pages per a block are always 64 in OneNAND */
mtd->erasesize = mtd->writesize << 6;
this->erase_shift = ffs(mtd->erasesize) - 1;
this->page_shift = ffs(mtd->writesize) - 1;
this->ppb_shift = (this->erase_shift - this->page_shift);
this->page_mask = (mtd->erasesize / mtd->writesize) - 1;
this->page_mask = (1 << (this->erase_shift - this->page_shift)) - 1;
/* REVIST: Multichip handling */
mtd->size = this->chipsize;
/* Check OneNAND lock scheme */
onenand_lock_scheme(mtd);
/* Check OneNAND features */
onenand_check_features(mtd);
return 0;
}
@ -2021,6 +2261,7 @@ static void onenand_resume(struct mtd_info *mtd)
*/
int onenand_scan(struct mtd_info *mtd, int maxchips)
{
int i;
struct onenand_chip *this = mtd->priv;
if (!this->read_word)
@ -2092,6 +2333,16 @@ int onenand_scan(struct mtd_info *mtd, int maxchips)
}
this->subpagesize = mtd->writesize >> mtd->subpage_sft;
/*
* The number of bytes available for a client to place data into
* the out of band area
*/
this->ecclayout->oobavail = 0;
for (i = 0; this->ecclayout->oobfree[i].length; i++)
this->ecclayout->oobavail +=
this->ecclayout->oobfree[i].length;
mtd->ecclayout = this->ecclayout;
/* Fill in remaining MTD driver data */
@ -2144,8 +2395,11 @@ void onenand_release(struct mtd_info *mtd)
del_mtd_device (mtd);
/* Free bad block table memory, if allocated */
if (this->bbm)
if (this->bbm) {
struct bbm_info *bbm = this->bbm;
kfree(bbm->bbt);
kfree(this->bbm);
}
/* Buffer allocated by onenand_scan */
if (this->options & ONENAND_PAGEBUF_ALLOC)
kfree(this->page_buf);

27
drivers/mtd/onenand/onenand_bbt.c
View File

@ -17,8 +17,8 @@
#include <linux/mtd/onenand.h>
#include <linux/mtd/compatmac.h>
extern int onenand_do_read_oob(struct mtd_info *mtd, loff_t from, size_t len,
size_t *retlen, u_char *buf);
extern int onenand_bbt_read_oob(struct mtd_info *mtd, loff_t from,
struct mtd_oob_ops *ops);
/**
* check_short_pattern - [GENERIC] check if a pattern is in the buffer
@ -65,10 +65,11 @@ static int create_bbt(struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr
int startblock;
loff_t from;
size_t readlen, ooblen;
struct mtd_oob_ops ops;
printk(KERN_INFO "Scanning device for bad blocks\n");
len = 1;
len = 2;
/* We need only read few bytes from the OOB area */
scanlen = ooblen = 0;
@ -82,22 +83,24 @@ static int create_bbt(struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr
startblock = 0;
from = 0;
ops.mode = MTD_OOB_PLACE;
ops.ooblen = readlen;
ops.oobbuf = buf;
ops.len = ops.ooboffs = ops.retlen = ops.oobretlen = 0;
for (i = startblock; i < numblocks; ) {
int ret;
for (j = 0; j < len; j++) {
size_t retlen;
/* No need to read pages fully,
* just read required OOB bytes */
ret = onenand_do_read_oob(mtd, from + j * mtd->writesize + bd->offs,
readlen, &retlen, &buf[0]);
ret = onenand_bbt_read_oob(mtd, from + j * mtd->writesize + bd->offs, &ops);
/* If it is a initial bad block, just ignore it */
if (ret && !(ret & ONENAND_CTRL_LOAD))
return ret;
if (ret == ONENAND_BBT_READ_FATAL_ERROR)
return -EIO;
if (check_short_pattern(&buf[j * scanlen], scanlen, mtd->writesize, bd)) {
if (ret || check_short_pattern(&buf[j * scanlen], scanlen, mtd->writesize, bd)) {
bbm->bbt[i >> 3] |= 0x03 << (i & 0x6);
printk(KERN_WARNING "Bad eraseblock %d at 0x%08x\n",
i >> 1, (unsigned int) from);
@ -168,8 +171,8 @@ static int onenand_isbad_bbt(struct mtd_info *mtd, loff_t offs, int allowbbt)
* marked good / bad blocks and writes the bad block table(s) to
* the selected place.
*
* The bad block table memory is allocated here. It must be freed
* by calling the onenand_free_bbt function.
* The bad block table memory is allocated here. It is freed
* by the onenand_release function.
*
*/
int onenand_scan_bbt(struct mtd_info *mtd, struct nand_bbt_descr *bd)

7
include/linux/mtd/bbm.h
View File

@ -92,6 +92,13 @@ struct nand_bbt_descr {
*/
#define ONENAND_BADBLOCK_POS 0
/*
* Bad block scanning errors
*/
#define ONENAND_BBT_READ_ERROR 1
#define ONENAND_BBT_READ_ECC_ERROR 2
#define ONENAND_BBT_READ_FATAL_ERROR 4
/**
* struct bbm_info - [GENERIC] Bad Block Table data structure
* @bbt_erase_shift: [INTERN] number of address bits in a bbt entry

15
include/linux/mtd/onenand.h
View File

@ -1,7 +1,7 @@
/*
* linux/include/linux/mtd/onenand.h
*
* Copyright (C) 2005-2006 Samsung Electronics
* Copyright (C) 2005-2007 Samsung Electronics
* Kyungmin Park <kyungmin.park@samsung.com>
*
* This program is free software; you can redistribute it and/or modify
@ -42,14 +42,10 @@ typedef enum {
/**
* struct onenand_bufferram - OneNAND BufferRAM Data
* @block: block address in BufferRAM
* @page: page address in BufferRAM
* @valid: valid flag
* @blockpage: block & page address in BufferRAM
*/
struct onenand_bufferram {
int block;
int page;
int valid;
int blockpage;
};
/**
@ -63,7 +59,6 @@ struct onenand_bufferram {
* 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
@ -103,7 +98,6 @@ struct onenand_chip {
unsigned int erase_shift;
unsigned int page_shift;
unsigned int ppb_shift; /* Pages per block shift */
unsigned int page_mask;
unsigned int bufferram_index;
@ -150,6 +144,9 @@ struct onenand_chip {
#define ONENAND_SET_SYS_CFG1(v, this) \
(this->write_word(v, this->base + ONENAND_REG_SYS_CFG1))
#define ONENAND_IS_DDP(this) \
(this->device_id & ONENAND_DEVICE_IS_DDP)
/* Check byte access in OneNAND */
#define ONENAND_CHECK_BYTE_ACCESS(addr) (addr & 0x1)

7
include/linux/mtd/onenand_regs.h
View File

@ -3,7 +3,8 @@
*
* OneNAND Register header file
*
* Copyright (C) 2005-2006 Samsung Electronics
* Copyright (C) 2005-2007 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
@ -80,9 +81,11 @@
#define ONENAND_VERSION_PROCESS_SHIFT (8)
/*
* Start Address 1 F100h (R/W)
* Start Address 1 F100h (R/W) & Start Address 2 F101h (R/W)
*/
#define ONENAND_DDP_SHIFT (15)
#define ONENAND_DDP_CHIP0 (0)
#define ONENAND_DDP_CHIP1 (1 << ONENAND_DDP_SHIFT)
/*
* Start Address 8 F107h (R/W)