mtd: get the ECC info from the Extended Parameter Page
authorHuang Shijie <b32955@freescale.com>
Wed, 22 May 2013 02:28:27 +0000 (10:28 +0800)
committerDavid Woodhouse <David.Woodhouse@intel.com>
Fri, 30 Aug 2013 20:34:42 +0000 (21:34 +0100)
commit6dcbe0cdd83fb5f77be4f44c9e06c535281c375a
treea82e2da0e8bf5fb0b313055a8382d0e271f4a4f8
parent5b40db68cb1bd14b3d5b159754c9c1bc3bdeb080
mtd: get the ECC info from the Extended Parameter Page

Since the ONFI 2.1, the onfi spec adds the Extended Parameter Page
to store the ECC info.

The onfi spec tells us that if the nand chip's recommended ECC codeword
size is not 512 bytes, then the @ecc_bits is 0xff. The host _SHOULD_ then
read the Extended ECC information that is part of the extended parameter
page to retrieve the ECC requirements for this device.

This patch implement the reading of the Extended Parameter Page, and parses
the sections for ECC type, and get the ECC info from the ECC section.

Tested this patch with Micron MT29F64G08CBABAWP.

Acked-by: Pekon Gupta <pekon@ti.com>
Signed-off-by: Huang Shijie <b32955@freescale.com>
Reviewed-and-tested-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
drivers/mtd/nand/nand_base.c