mirror of https://gitee.com/openkylin/linux.git
[MTD] OneNAND: Add support for auto-placement of out-of-band data
Enable the use of oob operation mode MTD_OOB_AUTO with OneNAND. Note that MTD_OOB_RAW is still not supported. Signed-off-by: Adrian Hunter <ext-adrian.hunter@nokia.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
This commit is contained in:
Adrian Hunter
Kyungmin Park
parent
9bfbc9b24f
commit
a5e7c7b447
|
|
@ -786,6 +786,45 @@ 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 + readcol,
|
||||
readcol, readend - readcol);
|
||||
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
|
||||
|
|
@ -793,14 +832,15 @@ 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)
|
||||
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);
|
||||
|
|
@ -808,21 +848,33 @@ 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)) {
|
||||
DEBUG(MTD_DEBUG_LEVEL0, "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)) {
|
||||
DEBUG(MTD_DEBUG_LEVEL0, "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);
|
||||
|
|
@ -832,7 +884,10 @@ 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);
|
||||
|
|
@ -871,10 +926,18 @@ int onenand_do_read_oob(struct mtd_info *mtd, loff_t from, size_t len,
|
|||
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:
|
||||
return -EINVAL; /* 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);
|
||||
}
|
||||
|
||||
#ifdef CONFIG_MTD_ONENAND_VERIFY_WRITE
|
||||
|
|
@ -883,14 +946,12 @@ 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);
|
||||
|
|
@ -899,9 +960,8 @@ 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;
|
||||
|
||||
|
|
@ -1059,6 +1119,44 @@ 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;
|
||||
}
|
||||
writeend = mtd->oobsize;
|
||||
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
|
||||
|
|
@ -1066,14 +1164,15 @@ 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);
|
||||
|
|
@ -1081,9 +1180,23 @@ 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)) {
|
||||
DEBUG(MTD_DEBUG_LEVEL0, "onenand_write_oob: Attempted to start write outside oob\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)) {
|
||||
DEBUG(MTD_DEBUG_LEVEL0, "onenand_write_oob: Attempted to write past end of device\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
|
|
@ -1092,18 +1205,19 @@ 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);
|
||||
|
|
@ -1112,11 +1226,11 @@ 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);
|
||||
DEBUG(MTD_DEBUG_LEVEL0, "onenand_write_oob: write failed %d\n", ret);
|
||||
goto out;
|
||||
}
|
||||
|
||||
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;
|
||||
|
|
@ -1127,8 +1241,9 @@ static int onenand_do_write_oob(struct mtd_info *mtd, loff_t to, size_t len,
|
|||
if (written == len)
|
||||
break;
|
||||
|
||||
to += thislen;
|
||||
to += mtd->writesize;
|
||||
buf += thislen;
|
||||
column = 0;
|
||||
}
|
||||
|
||||
out:
|
||||
|
|
@ -1149,10 +1264,18 @@ static int onenand_do_write_oob(struct mtd_info *mtd, loff_t to, size_t len,
|
|||
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:
|
||||
return -EINVAL; /* 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);
|
||||
}
|
||||
|
||||
/**
|
||||
|
|
@ -1318,7 +1441,7 @@ 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);
|
||||
}
|
||||
|
||||
/**
|
||||
|
|
@ -1612,7 +1735,7 @@ 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);
|
||||
|
|
@ -2019,6 +2142,7 @@ 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)
|
||||
|
|
@ -2090,6 +2214,16 @@ 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 */
|
||||
|
|
|
|||
|
|
@ -18,7 +18,7 @@
|
|||
#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);
|
||||
size_t *retlen, u_char *buf, mtd_oob_mode_t mode);
|
||||
|
||||
/**
|
||||
* check_short_pattern - [GENERIC] check if a pattern is in the buffer
|
||||
|
|
@ -91,7 +91,7 @@ static int create_bbt(struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr
|
|||
/* 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]);
|
||||
readlen, &retlen, &buf[0], MTD_OOB_PLACE);
|
||||
|
||||
/* If it is a initial bad block, just ignore it */
|
||||
if (ret && !(ret & ONENAND_CTRL_LOAD))
|
||||
|
|
|
|||
Loading…
Reference in New Issue