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mtd: sh_flctl: Use user oob data in hardware ECC mode 

In hardware ecc mode, the flctl now writes and reads the oob data
provided by the user. Additionally the ECC is now returned in normal
page reads, not only when using the explicit NAND_CMD_READOOB command.

Signed-off-by: Bastian Hecht <hechtb@gmail.com>
Acked-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
Bastian Hecht 2012-05-14 14:14:47 +02:00 committed by David Woodhouse
parent 6667a6d58e
commit 3166df0d04
1 changed files with 17 additions and 8 deletions
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25
drivers/mtd/nand/sh_flctl.c
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@ -275,13 +275,12 @@ static void read_fiforeg(struct sh_flctl *flctl, int rlen, int offset)
{
int i, len_4align;
unsigned long *buf = (unsigned long *)&flctl->done_buff[offset];
void *fifo_addr = (void *)FLDTFIFO(flctl);
len_4align = (rlen + 3) / 4;
for (i = 0; i < len_4align; i++) {
wait_rfifo_ready(flctl);
buf[i] = readl(fifo_addr);
buf[i] = readl(FLDTFIFO(flctl));
buf[i] = be32_to_cpu(buf[i]);
}
}
@ -318,6 +317,18 @@ static void write_fiforeg(struct sh_flctl *flctl, int rlen, int offset)
}
}
static void write_ec_fiforeg(struct sh_flctl *flctl, int rlen, int offset)
{
int i, len_4align;
unsigned long *data = (unsigned long *)&flctl->done_buff[offset];
len_4align = (rlen + 3) / 4;
for (i = 0; i < len_4align; i++) {
wait_wecfifo_ready(flctl);
writel(cpu_to_be32(data[i]), FLECFIFO(flctl));
}
}
static void set_cmd_regs(struct mtd_info *mtd, uint32_t cmd, uint32_t flcmcdr_val)
{
struct sh_flctl *flctl = mtd_to_flctl(mtd);
@ -384,6 +395,7 @@ static int flctl_read_page_hwecc(struct mtd_info *mtd, struct nand_chip *chip,
uint8_t *buf, int oob_required, int page)
{
chip->read_buf(mtd, buf, mtd->writesize);
chip->read_buf(mtd, chip->oob_poi, mtd->oobsize);
return 0;
}
@ -391,6 +403,7 @@ static void flctl_write_page_hwecc(struct mtd_info *mtd, struct nand_chip *chip,
const uint8_t *buf, int oob_required)
{
chip->write_buf(mtd, buf, mtd->writesize);
chip->write_buf(mtd, chip->oob_poi, mtd->oobsize);
}
static void execmd_read_page_sector(struct mtd_info *mtd, int page_addr)
@ -466,7 +479,7 @@ static void execmd_read_oob(struct mtd_info *mtd, int page_addr)
static void execmd_write_page_sector(struct mtd_info *mtd)
{
struct sh_flctl *flctl = mtd_to_flctl(mtd);
int i, page_addr = flctl->seqin_page_addr;
int page_addr = flctl->seqin_page_addr;
int sector, page_sectors;
page_sectors = flctl->page_size ? 4 : 1;
@ -482,11 +495,7 @@ static void execmd_write_page_sector(struct mtd_info *mtd)
for (sector = 0; sector < page_sectors; sector++) {
write_fiforeg(flctl, 512, 512 * sector);
for (i = 0; i < 4; i++) {
wait_wecfifo_ready(flctl); /* wait for write ready */
writel(0xFFFFFFFF, FLECFIFO(flctl));
}
write_ec_fiforeg(flctl, 16, mtd->writesize + 16 * sector);
}
wait_completion(flctl);