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Commit 3166df0d authored by Bastian Hecht's avatar Bastian Hecht Committed by David Woodhouse
Browse files

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: default avatarBastian Hecht <hechtb@gmail.com>
Acked-by: default avatarBrian Norris <computersforpeace@gmail.com>
Signed-off-by: default avatarArtem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: default avatarDavid Woodhouse <David.Woodhouse@intel.com>
parent 6667a6d5

drivers/mtd/nand/sh_flctl.c

+17 −8
Original line number Original line Diff line number Diff line
@@ -275,13 +275,12 @@ static void read_fiforeg(struct sh_flctl *flctl, int rlen, int offset) 
{

{

	int i, len_4align;

	int i, len_4align;

	unsigned long *buf = (unsigned long *)&flctl->done_buff[offset];

	unsigned long *buf = (unsigned long *)&flctl->done_buff[offset];

	void *fifo_addr = (void *)FLDTFIFO(flctl);





	len_4align = (rlen + 3) / 4;

	len_4align = (rlen + 3) / 4;





	for (i = 0; i < len_4align; i++) {

	for (i = 0; i < len_4align; i++) {

		wait_rfifo_ready(flctl);

		wait_rfifo_ready(flctl);

		buf[i] = readl(fifo_addr);

		buf[i] = readl(FLDTFIFO(flctl));

		buf[i] = be32_to_cpu(buf[i]);

		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)

static void set_cmd_regs(struct mtd_info *mtd, uint32_t cmd, uint32_t flcmcdr_val)

{

{

	struct sh_flctl *flctl = mtd_to_flctl(mtd);

	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)

				uint8_t *buf, int oob_required, int page)

{

{

	chip->read_buf(mtd, buf, mtd->writesize);

	chip->read_buf(mtd, buf, mtd->writesize);

	chip->read_buf(mtd, chip->oob_poi, mtd->oobsize);

	return 0;

	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)

				   const uint8_t *buf, int oob_required)

{

{

	chip->write_buf(mtd, buf, mtd->writesize);

	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)

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)

static void execmd_write_page_sector(struct mtd_info *mtd)

{

{

	struct sh_flctl *flctl = mtd_to_flctl(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;

	int sector, page_sectors;





	page_sectors = flctl->page_size ? 4 : 1;

	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++) {

	for (sector = 0; sector < page_sectors; sector++) {

		write_fiforeg(flctl, 512, 512 * sector);

		write_fiforeg(flctl, 512, 512 * sector);



		write_ec_fiforeg(flctl, 16, mtd->writesize + 16 * sector);

		for (i = 0; i < 4; i++) {

			wait_wecfifo_ready(flctl); /* wait for write ready */

			writel(0xFFFFFFFF, FLECFIFO(flctl));

		}

	}

	}





	wait_completion(flctl);

	wait_completion(flctl);