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Merge branch 'master' of git://git.denx.de/u-boot-nand-flash

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master
Tom Rini 12 years ago
parent 2d65256bb0 fcd0524574
commit ef184040b7
2 changed files with 62 additions and 48 deletions
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  1. 2
      drivers/mtd/nand/nand_util.c
  2. 108
      drivers/mtd/nand/omap_gpmc.c

2
drivers/mtd/nand/nand_util.c
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@ -315,7 +315,7 @@ int nand_unlock(struct mtd_info *mtd, loff_t start, size_t length,
int page;
struct nand_chip *chip = mtd->priv;
debug("nand_unlock%s: start: %08llx, length: %d!\n",
debug("nand_unlock%s: start: %08llx, length: %zd!\n",
allexcept ? " (allexcept)" : "", start, length);
/* select the NAND device */

108
drivers/mtd/nand/omap_gpmc.c
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@ -283,53 +283,55 @@ static void omap_hwecc_init_bch(struct nand_chip *chip, int32_t mode)
if (bch->ecc_scheme == OMAP_ECC_BCH8_CODE_HW) {
wr_mode = BCH_WRAPMODE_1;
switch (bch->nibbles) {
case ECC_BCH4_NIBBLES:
unused_length = 3;
break;
case ECC_BCH8_NIBBLES:
unused_length = 2;
break;
case ECC_BCH16_NIBBLES:
unused_length = 0;
break;
}
/*
* This is ecc_size_config for ELM mode.
* Here we are using different settings for read and write access and
* also depending on BCH strength.
*/
switch (mode) {
case NAND_ECC_WRITE:
/* write access only setup eccsize1 config */
val = ((unused_length + bch->nibbles) << 22);
break;
switch (bch->nibbles) {
case ECC_BCH4_NIBBLES:
unused_length = 3;
break;
case ECC_BCH8_NIBBLES:
unused_length = 2;
break;
case ECC_BCH16_NIBBLES:
unused_length = 0;
break;
}
case NAND_ECC_READ:
default:
/*
* by default eccsize0 selected for ecc1resultsize
* eccsize0 config.
* This is ecc_size_config for ELM mode. Here we are using
* different settings for read and write access and also
* depending on BCH strength.
*/
val = (bch->nibbles << 12);
/* eccsize1 config */
val |= (unused_length << 22);
break;
}
switch (mode) {
case NAND_ECC_WRITE:
/* write access only setup eccsize1 config */
val = ((unused_length + bch->nibbles) << 22);
break;
case NAND_ECC_READ:
default:
/*
* by default eccsize0 selected for ecc1resultsize
* eccsize0 config.
*/
val = (bch->nibbles << 12);
/* eccsize1 config */
val |= (unused_length << 22);
break;
}
} else {
/*
* This ecc_size_config setting is for BCH sw library.
*
* Note: we only support BCH8 currently with BCH sw library!
* Should be really easy to adobt to BCH4, however some omap3 have
* flaws with BCH4.
*
* Here we are using wrapping mode 6 both for reading and writing, with:
* size0 = 0 (no additional protected byte in spare area)
* size1 = 32 (skip 32 nibbles = 16 bytes per sector in spare area)
*/
val = (32 << 22) | (0 << 12);
/*
* This ecc_size_config setting is for BCH sw library.
*
* Note: we only support BCH8 currently with BCH sw library!
* Should be really easy to adobt to BCH4, however some omap3
* have flaws with BCH4.
*
* Here we are using wrapping mode 6 both for reading and
* writing, with:
* size0 = 0 (no additional protected byte in spare area)
* size1 = 32 (skip 32 nibbles = 16 bytes per sector in
* spare area)
*/
val = (32 << 22) | (0 << 12);
}
/* ecc size configuration */
writel(val, &gpmc_cfg->ecc_size_config);
@ -761,7 +763,7 @@ static void __maybe_unused omap_free_bch(struct mtd_info *mtd)
static int omap_select_ecc_scheme(struct nand_chip *nand,
enum omap_ecc ecc_scheme, unsigned int pagesize, unsigned int oobsize) {
struct nand_bch_priv *bch = nand->priv;
struct nand_ecclayout *ecclayout = nand->ecc.layout;
struct nand_ecclayout *ecclayout = &omap_ecclayout;
int eccsteps = pagesize / SECTOR_BYTES;
int i;
@ -774,7 +776,7 @@ static int omap_select_ecc_scheme(struct nand_chip *nand,
bch_priv.type = 0;
nand->ecc.mode = NAND_ECC_SOFT;
nand->ecc.layout = NULL;
nand->ecc.size = pagesize;
nand->ecc.size = 0;
bch->ecc_scheme = OMAP_ECC_HAM1_CODE_SW;
break;
@ -789,6 +791,7 @@ static int omap_select_ecc_scheme(struct nand_chip *nand,
bch_priv.control = NULL;
bch_priv.type = 0;
/* populate ecc specific fields */
memset(&nand->ecc, 0, sizeof(struct nand_ecc_ctrl));
nand->ecc.mode = NAND_ECC_HW;
nand->ecc.strength = 1;
nand->ecc.size = SECTOR_BYTES;
@ -798,8 +801,12 @@ static int omap_select_ecc_scheme(struct nand_chip *nand,
nand->ecc.calculate = omap_calculate_ecc;
/* define ecc-layout */
ecclayout->eccbytes = nand->ecc.bytes * eccsteps;
for (i = 0; i < ecclayout->eccbytes; i++)
ecclayout->eccpos[i] = i + BADBLOCK_MARKER_LENGTH;
for (i = 0; i < ecclayout->eccbytes; i++) {
if (nand->options & NAND_BUSWIDTH_16)
ecclayout->eccpos[i] = i + 2;
else
ecclayout->eccpos[i] = i + 1;
}
ecclayout->oobfree[0].offset = i + BADBLOCK_MARKER_LENGTH;
ecclayout->oobfree[0].length = oobsize - ecclayout->eccbytes -
BADBLOCK_MARKER_LENGTH;
@ -823,6 +830,7 @@ static int omap_select_ecc_scheme(struct nand_chip *nand,
}
bch_priv.type = ECC_BCH8;
/* populate ecc specific fields */
memset(&nand->ecc, 0, sizeof(struct nand_ecc_ctrl));
nand->ecc.mode = NAND_ECC_HW;
nand->ecc.strength = 8;
nand->ecc.size = SECTOR_BYTES;
@ -865,6 +873,7 @@ static int omap_select_ecc_scheme(struct nand_chip *nand,
elm_init();
bch_priv.type = ECC_BCH8;
/* populate ecc specific fields */
memset(&nand->ecc, 0, sizeof(struct nand_ecc_ctrl));
nand->ecc.mode = NAND_ECC_HW;
nand->ecc.strength = 8;
nand->ecc.size = SECTOR_BYTES;
@ -891,6 +900,11 @@ static int omap_select_ecc_scheme(struct nand_chip *nand,
debug("nand: error: ecc scheme not enabled or supported\n");
return -EINVAL;
}
/* nand_scan_tail() sets ham1 sw ecc; hw ecc layout is set by driver */
if (ecc_scheme != OMAP_ECC_HAM1_CODE_SW)
nand->ecc.layout = ecclayout;
return 0;
}

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