xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

[MTD] Remove read/write _ecc variants

Browse Source 
MTD clients are agnostic of FLASH which needs ECC suppport.
Remove the functions and fixup the callers.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Thomas Gleixner
2006-05-23 17:21:03 +02:00
parent 2528e8cdf3
commit 9223a456da
15 changed files with 209 additions and 404 deletions
Download Patch File Download Diff File Expand all files Collapse all files

104
drivers/mtd/nand/nand_bbt.c
View File

@@ -156,7 +156,7 @@ static int read_bbt(struct mtd_info *mtd, uint8_t *buf, int page, int num,
while (totlen) {
len = min(totlen, (size_t) (1 << this->bbt_erase_shift));
res = mtd->read_ecc(mtd, from, len, &retlen, buf, NULL, this->autooob);
res = mtd->read(mtd, from, len, &retlen, buf);
if (res < 0) {
if (retlen != len) {
printk(KERN_INFO "nand_bbt: Error reading bad block table\n");
@@ -471,17 +471,17 @@ static int search_read_bbts(struct mtd_info *mtd, uint8_t * buf, struct nand_bbt
*
*/
static int write_bbt(struct mtd_info *mtd, uint8_t *buf,
struct nand_bbt_descr *td, struct nand_bbt_descr *md, int chipsel)
struct nand_bbt_descr *td, struct nand_bbt_descr *md,
int chipsel)
{
struct nand_chip *this = mtd->priv;
struct nand_oobinfo oobinfo;
struct erase_info einfo;
int i, j, res, chip = 0;
int bits, startblock, dir, page, offs, numblocks, sft, sftmsk;
int nrchips, bbtoffs, pageoffs;
int nrchips, bbtoffs, pageoffs, ooboffs;
uint8_t msk[4];
uint8_t rcode = td->reserved_block_code;
size_t retlen, len = 0;
size_t retlen, len = 0, ooblen;
loff_t to;
if (!rcode)
@@ -526,12 +526,14 @@ static int write_bbt(struct mtd_info *mtd, uint8_t *buf,
for (i = 0; i < td->maxblocks; i++) {
int block = startblock + dir * i;
/* Check, if the block is bad */
switch ((this->bbt[block >> 2] >> (2 * (block & 0x03))) & 0x03) {
switch ((this->bbt[block >> 2] >>
(2 * (block & 0x03))) & 0x03) {
case 0x01:
case 0x03:
continue;
}
page = block << (this->bbt_erase_shift - this->page_shift);
page = block <<
(this->bbt_erase_shift - this->page_shift);
/* Check, if the block is used by the mirror table */
if (!md || md->pages[chip] != page)
goto write;
@@ -542,11 +544,20 @@ static int write_bbt(struct mtd_info *mtd, uint8_t *buf,
/* Set up shift count and masks for the flash table */
bits = td->options & NAND_BBT_NRBITS_MSK;
msk[2] = ~rcode;
switch (bits) {
case 1: sft = 3; sftmsk = 0x07; msk[0] = 0x00; msk[1] = 0x01; msk[2] = ~rcode; msk[3] = 0x01; break;
case 2: sft = 2; sftmsk = 0x06; msk[0] = 0x00; msk[1] = 0x01; msk[2] = ~rcode; msk[3] = 0x03; break;
case 4: sft = 1; sftmsk = 0x04; msk[0] = 0x00; msk[1] = 0x0C; msk[2] = ~rcode; msk[3] = 0x0f; break;
case 8: sft = 0; sftmsk = 0x00; msk[0] = 0x00; msk[1] = 0x0F; msk[2] = ~rcode; msk[3] = 0xff; break;
case 1: sft = 3; sftmsk = 0x07; msk[0] = 0x00; msk[1] = 0x01;
msk[3] = 0x01;
break;
case 2: sft = 2; sftmsk = 0x06; msk[0] = 0x00; msk[1] = 0x01;
msk[3] = 0x03;
break;
case 4: sft = 1; sftmsk = 0x04; msk[0] = 0x00; msk[1] = 0x0C;
msk[3] = 0x0f;
break;
case 8: sft = 0; sftmsk = 0x00; msk[0] = 0x00; msk[1] = 0x0F;
msk[3] = 0xff;
break;
default: return -EINVAL;
}
@@ -554,49 +565,55 @@ static int write_bbt(struct mtd_info *mtd, uint8_t *buf,
to = ((loff_t) page) << this->page_shift;
memcpy(&oobinfo, this->autooob, sizeof(oobinfo));
oobinfo.useecc = MTD_NANDECC_PLACEONLY;
/* Must we save the block contents ? */
if (td->options & NAND_BBT_SAVECONTENT) {
/* Make it block aligned */
to &= ~((loff_t) ((1 << this->bbt_erase_shift) - 1));
len = 1 << this->bbt_erase_shift;
res = mtd->read_ecc(mtd, to, len, &retlen, buf, &buf[len], &oobinfo);
res = mtd->read(mtd, to, len, &retlen, buf);
if (res < 0) {
if (retlen != len) {
printk(KERN_INFO
"nand_bbt: Error reading block for writing the bad block table\n");
printk(KERN_INFO "nand_bbt: Error "
"reading block for writing "
"the bad block table\n");
return res;
}
printk(KERN_WARNING "nand_bbt: ECC error while reading block for writing bad block table\n");
printk(KERN_WARNING "nand_bbt: ECC error "
"while reading block for writing "
"bad block table\n");
}
/* Read oob data */
ooblen = (len >> this->page_shift) * mtd->oobsize;
res = mtd->read_oob(mtd, to + mtd->writesize, ooblen,
&retlen, &buf[len]);
if (res < 0 || retlen != ooblen)
goto outerr;
/* Calc the byte offset in the buffer */
pageoffs = page - (int)(to >> this->page_shift);
offs = pageoffs << this->page_shift;
/* Preset the bbt area with 0xff */
memset(&buf[offs], 0xff, (size_t) (numblocks >> sft));
/* Preset the bbt's oob area with 0xff */
memset(&buf[len + pageoffs * mtd->oobsize], 0xff,
((len >> this->page_shift) - pageoffs) * mtd->oobsize);
if (td->options & NAND_BBT_VERSION) {
buf[len + (pageoffs * mtd->oobsize) + td->veroffs] = td->version[chip];
}
ooboffs = len + (pageoffs * mtd->oobsize);
} else {
/* Calc length */
len = (size_t) (numblocks >> sft);
/* Make it page aligned ! */
len = (len + (mtd->writesize - 1)) & ~(mtd->writesize - 1);
len = (len + (mtd->writesize - 1)) &
~(mtd->writesize - 1);
/* Preset the buffer with 0xff */
memset(buf, 0xff, len + (len >> this->page_shift) * mtd->oobsize);
memset(buf, 0xff, len +
(len >> this->page_shift)* mtd->oobsize);
offs = 0;
ooboffs = len;
/* Pattern is located in oob area of first page */
memcpy(&buf[len + td->offs], td->pattern, td->len);
if (td->options & NAND_BBT_VERSION) {
buf[len + td->veroffs] = td->version[chip];
}
memcpy(&buf[ooboffs + td->offs], td->pattern, td->len);
}
if (td->options & NAND_BBT_VERSION)
buf[ooboffs + td->veroffs] = td->version[chip];
/* walk through the memory table */
for (i = 0; i < numblocks;) {
uint8_t dat;
@@ -604,7 +621,8 @@ static int write_bbt(struct mtd_info *mtd, uint8_t *buf,
for (j = 0; j < 4; j++, i++) {
int sftcnt = (i << (3 - sft)) & sftmsk;
/* Do not store the reserved bbt blocks ! */
buf[offs + (i >> sft)] &= ~(msk[dat & 0x03] << sftcnt);
buf[offs + (i >> sft)] &=
~(msk[dat & 0x03] << sftcnt);
dat >>= 2;
}
}
@@ -614,23 +632,25 @@ static int write_bbt(struct mtd_info *mtd, uint8_t *buf,
einfo.addr = (unsigned long)to;
einfo.len = 1 << this->bbt_erase_shift;
res = nand_erase_nand(mtd, &einfo, 1);
if (res < 0) {
printk(KERN_WARNING "nand_bbt: Error during block erase: %d\n", res);
return res;
}
if (res < 0)
goto outerr;
res = mtd->write_ecc(mtd, to, len, &retlen, buf, &buf[len], &oobinfo);
if (res < 0) {
printk(KERN_WARNING "nand_bbt: Error while writing bad block table %d\n", res);
return res;
}
printk(KERN_DEBUG "Bad block table written to 0x%08x, version 0x%02X\n",
(unsigned int)to, td->version[chip]);
res = nand_write_raw(mtd, to, len, &retlen, buf, &buf[len]);
if (res < 0)
goto outerr;
printk(KERN_DEBUG "Bad block table written to 0x%08x, version "
"0x%02X\n", (unsigned int)to, td->version[chip]);
/* Mark it as used */
td->pages[chip] = page;
}
return 0;
outerr:
printk(KERN_WARNING
"nand_bbt: Error while writing bad block table %d\n", res);
return res;
}
/**