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OneNAND: Additional sync with 2.6.27

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- Add subpage write support
- Add onenand_oob_64/32 ecclayout

This has been missing and without it UBI has some incompatibilies issues
with the current (>= 2.6.27) Linux kernel version. vid_hdr_offset is
placed differently (2048 instead of 512) without this fix.

Signed-off-by: Stefan Roese <sr@denx.de>
Signed-off-by: Scott Wood <scottwood@freescale.com>
This commit is contained in:
Stefan Roese 2008-12-02 11:06:47 +01:00 committed by Scott Wood
parent 1714f51a20
commit 1ae3986204
2 changed files with 72 additions and 1 deletions
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72
drivers/mtd/onenand/onenand_base.c
View File

@ -36,6 +36,35 @@ static inline void *memcpy_16(void *dst, const void *src, unsigned int len)
return ret;
}
/**
* onenand_oob_64 - oob info for large (2KB) page
*/
static struct nand_ecclayout onenand_oob_64 = {
.eccbytes = 20,
.eccpos = {
8, 9, 10, 11, 12,
24, 25, 26, 27, 28,
40, 41, 42, 43, 44,
56, 57, 58, 59, 60,
},
.oobfree = {
{2, 3}, {14, 2}, {18, 3}, {30, 2},
{34, 3}, {46, 2}, {50, 3}, {62, 2}
}
};
/**
* onenand_oob_32 - oob info for middle (1KB) page
*/
static struct nand_ecclayout onenand_oob_32 = {
.eccbytes = 10,
.eccpos = {
8, 9, 10, 11, 12,
24, 25, 26, 27, 28,
},
.oobfree = { {2, 3}, {14, 2}, {18, 3}, {30, 2} }
};
static const unsigned char ffchars[] = {
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 16 */
@ -1079,7 +1108,7 @@ static int onenand_verify(struct mtd_info *mtd, const u_char *buf, loff_t addr,
#define onenand_verify_oob(...) (0)
#endif
#define NOTALIGNED(x) ((x & (mtd->writesize - 1)) != 0)
#define NOTALIGNED(x) ((x & (this->subpagesize - 1)) != 0)
/**
* onenand_fill_auto_oob - [Internal] oob auto-placement transfer
@ -2058,6 +2087,7 @@ static int onenand_probe(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)
@ -2115,6 +2145,46 @@ int onenand_scan(struct mtd_info *mtd, int maxchips)
this->options |= ONENAND_OOBBUF_ALLOC;
}
this->state = FL_READY;
/*
* Allow subpage writes up to oobsize.
*/
switch (mtd->oobsize) {
case 64:
this->ecclayout = &onenand_oob_64;
mtd->subpage_sft = 2;
break;
case 32:
this->ecclayout = &onenand_oob_32;
mtd->subpage_sft = 1;
break;
default:
printk(KERN_WARNING "No OOB scheme defined for oobsize %d\n",
mtd->oobsize);
mtd->subpage_sft = 0;
/* To prevent kernel oops */
this->ecclayout = &onenand_oob_32;
break;
}
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; i < MTD_MAX_OOBFREE_ENTRIES &&
this->ecclayout->oobfree[i].length; i++)
this->ecclayout->oobavail +=
this->ecclayout->oobfree[i].length;
mtd->oobavail = this->ecclayout->oobavail;
mtd->ecclayout = this->ecclayout;
/* Unlock whole block */
onenand_unlock_all(mtd);

1
include/linux/mtd/onenand.h
View File

@ -107,6 +107,7 @@ struct onenand_chip {
unsigned char *oob_buf;
struct nand_oobinfo *autooob;
int subpagesize;
struct nand_ecclayout *ecclayout;
void *bbm;