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NAND: Added support for 128-bit OOB, adapted 

Signed-off-by: Sergei Poselenov <sposelenov@emcraft.com>
This commit is contained in:
Sergei Poselenov 2008-06-06 15:42:43 +02:00 committed by Andrew Fleming-AFLEMING
parent 31ca020861
commit 248ae5cfc8
2 changed files with 34 additions and 14 deletions
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46
drivers/mtd/nand/nand_base.c
View File

@ -113,18 +113,22 @@ static struct nand_oobinfo nand_oob_64 = {
.oobfree = { {2, 38} }
};
/* This is used for padding purposes in nand_write_oob */
static u_char ffchars[] = {
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
static struct nand_oobinfo nand_oob_128 = {
.useecc = MTD_NANDECC_AUTOPLACE,
.eccbytes = 48,
.eccpos = {
80, 81, 82, 83, 84, 85, 86, 87,
88, 89, 90, 91, 92, 93, 94, 95,
96, 97, 98, 99, 100, 101, 102, 103,
104, 105, 106, 107, 108, 109, 110, 111,
112, 113, 114, 115, 116, 117, 118, 119,
120, 121, 122, 123, 124, 125, 126, 127},
.oobfree = { {2, 78} }
};
/* This is used for padding purposes in nand_write_oob */
static u_char *ffchars;
/*
* NAND low-level MTD interface functions
*/
@ -193,6 +197,10 @@ static void nand_release_device (struct mtd_info *mtd)
{
struct nand_chip *this = mtd->priv;
this->select_chip(mtd, -1); /* De-select the NAND device */
if (ffchars) {
kfree(ffchars);
ffchars = NULL;
}
}
#endif
@ -891,7 +899,7 @@ static int nand_write_page (struct mtd_info *mtd, struct nand_chip *this, int pa
u_char *oob_buf, struct nand_oobinfo *oobsel, int cached)
{
int i, status;
u_char ecc_code[32];
u_char ecc_code[NAND_MAX_OOBSIZE];
int eccmode = oobsel->useecc ? this->eccmode : NAND_ECC_NONE;
uint *oob_config = oobsel->eccpos;
int datidx = 0, eccidx = 0, eccsteps = this->eccsteps;
@ -1112,8 +1120,8 @@ static int nand_read_ecc (struct mtd_info *mtd, loff_t from, size_t len,
int read = 0, oob = 0, ecc_status = 0, ecc_failed = 0;
struct nand_chip *this = mtd->priv;
u_char *data_poi, *oob_data = oob_buf;
u_char ecc_calc[32];
u_char ecc_code[32];
u_char ecc_calc[NAND_MAX_OOBSIZE];
u_char ecc_code[NAND_MAX_OOBSIZE];
int eccmode, eccsteps;
unsigned *oob_config;
int datidx;
@ -1811,6 +1819,15 @@ static int nand_write_oob (struct mtd_info *mtd, loff_t to, size_t len, size_t *
if (NAND_MUST_PAD(this)) {
/* Write out desired data */
this->cmdfunc (mtd, NAND_CMD_SEQIN, mtd->oobblock, page & this->pagemask);
if (!ffchars) {
if (!(ffchars = kmalloc (mtd->oobsize, GFP_KERNEL))) {
DEBUG (MTD_DEBUG_LEVEL0, "nand_write_oob: "
"No memory for padding array, need %d bytes", mtd->oobsize);
ret = -ENOMEM;
goto out;
}
memset(ffchars, 0xff, mtd->oobsize);
}
/* prepad 0xff for partial programming */
this->write_buf(mtd, ffchars, column);
/* write data */
@ -2479,6 +2496,9 @@ int nand_scan (struct mtd_info *mtd, int maxchips)
case 64:
this->autooob = &nand_oob_64;
break;
case 128:
this->autooob = &nand_oob_128;
break;
default:
printk (KERN_WARNING "No oob scheme defined for oobsize %d\n",
mtd->oobsize);

2
include/linux/mtd/mtd-abi.h
View File

@ -93,7 +93,7 @@ struct nand_oobinfo {
uint32_t useecc;
uint32_t eccbytes;
uint32_t oobfree[8][2];
uint32_t eccpos[32];
uint32_t eccpos[48];
};
#endif /* __MTD_ABI_H__ */