Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit cde36b37 authored by Adrian Hunter's avatar Adrian Hunter Committed by Kyungmin Park
Browse files

[MTD] OneNAND: Select correct chip's bufferRAM for DDP 



OneNAND double-density package (DDP) has two chips, each with
their own bufferRAM.  The driver will skip loading data from
the NAND core if the data can be found in a bufferRAM, however
in that case, the correct chip's bufferRAM must be selected
before reading from bufferRAM.

Signed-off-by: default avatarAdrian Hunter <ext-adrian.hunter@nokia.com>
Signed-off-by: default avatarKyungmin Park <kyungmin.park@samsung.com>
parent 211ac75f

drivers/mtd/onenand/onenand_base.c

+16 −8
Original line number Diff line number Diff line
@@ -577,7 +577,7 @@ static int onenand_write_bufferram(struct mtd_info *mtd, int area, 
static int onenand_check_bufferram(struct mtd_info *mtd, loff_t addr)

{

	struct onenand_chip *this = mtd->priv;

	int blockpage;

	int blockpage, found = 0;

	unsigned int i;



	blockpage = (int) (addr >> this->page_shift);
@@ -585,16 +585,24 @@ static int onenand_check_bufferram(struct mtd_info *mtd, loff_t addr) 
	/* Is there valid data? */

	i = ONENAND_CURRENT_BUFFERRAM(this);

	if (this->bufferram[i].blockpage == blockpage)

		return 1;



		found = 1;

	else {

		/* Check another BufferRAM */

		i = ONENAND_NEXT_BUFFERRAM(this);

		if (this->bufferram[i].blockpage == blockpage) {

			ONENAND_SET_NEXT_BUFFERRAM(this);

		return 1;

			found = 1;

		}

	}



	return 0;

	if (found && ONENAND_IS_DDP(this)) {

		/* Select DataRAM for DDP */

		int block = (int) (addr >> this->erase_shift);

		int value = onenand_bufferram_address(this, block);

		this->write_word(value, this->base + ONENAND_REG_START_ADDRESS2);

	}



	return found;

}



/**