Commits
Pekon Gupta committed eae39cb4934
mtd: nand: omap: fix ecclayout to be in sync with u-boot NAND driver
Fixes: commit a919e51161b58ed7e6e663daba99ab7d558808f3
mtd: nand: omap2: clean-up BCHx_HW and BCHx_SW ECC configurations in device_probe
Fixes ecclayout mismatch introduced in above commit for following ecc-schemes:
- OMAP_ECC_BCH4_CODE_HW_DETECTION_SW
- OMAP_ECC_BCH8_CODE_HW_DETECTION_SW
However, this patch also touches other ecc-schemes as the fix required
refactoring common code, into ecc-scheme specific code.
This patch aligns ecc-layout for below ecc-schemes as per reference [1],[2],[3]
+---+------------+-------------++-------------+-------------+
|OOB|BCH8_CODE_HW|BCH8_CODE_HW_||HAM1_CODE_HW |HAM1_CODE_HW |
|pos| | DETECTION_SW||(x8 device) |(x16 device) |
+---+------------+-------------++-------------+-------------+
| 0 |BADBLK_MARK | BADBLK_MARK || BADBLK_MARK | BADBLK_MARK |
| 1 |BADBLK_MARK | BADBLK_MARK || eccpos[0] | BADBLK_MARK |
| 2 | eccpos[0] | eccpos[0] || eccpos[1] | eccpos[0] |
| 3 | eccpos[1] | eccpos[1] || eccpos[2] | eccpos[1] |
| 4 | eccpos[2] | eccpos[2] || eccpos[3] | eccpos[2] |
| 5 | eccpos[3] | eccpos[3] || eccpos[4] | eccpos[3] |
| 6 | eccpos[4] | eccpos[4] || eccpos[5] | eccpos[4] |
| 7 | eccpos[5] | eccpos[5] || eccpos[6] | eccpos[5] |
| 8 | eccpos[6] | eccpos[6] || eccpos[7] | eccpos[6] |
| 9 | eccpos[7] | eccpos[7] || eccpos[8] | eccpos[7] |
|10 | eccpos[8] | eccpos[8] || eccpos[9] | eccpos[8] |
|11 | eccpos[9] | eccpos[9] || eccpos[10] | eccpos[9] |
|12 | eccpos[10] | eccpos[10] || eccpos[11] | eccpos[10] |
|13 | eccpos[11] | eccpos[11] || oobfree[0] | eccpos[11] |
|14 | eccpos[12] | eccpos[12] || oobfree[1] | oobfree[0] |
|15 | eccpos[13] | <reserved> || oobfree[2] | oobfree[1] |
+---+------------+-------------++-------------+-------------+
|16 | eccpos[14] | eccpos[13] || oobfree[3] | oobfree[2] |
|...| [...] | [...] || [...] | [...] |
|56 | eccpos[54] | eccpos[51] || oobfree[43] | oobfree[42] |
|57 | eccpos[55] | <reserved> || oobfree[44] | oobfree[43] |
+===+============+=============+==============+=============+
|58 | oobfree[0] | oobfree[0] || oobfree[45] | oobfree[44] |
|59 | oobfree[1] | oobfree[1] || oobfree[46] | oobfree[45] |
|60 | oobfree[2] | oobfree[2] || oobfree[47] | oobfree[46] |
|61 | oobfree[3] | oobfree[3] || oobfree[48] | oobfree[47] |
|62 | oobfree[4] | oobfree[4] || oobfree[49] | oobfree[48] |
|63 | oobfree[5] | oobfree[5] || oobfree[50] | oobfree[49] |
+---+------------+-------------+--------------+-------------+
[1] ecc-layout expected by ROM code, as specified in SoC TRM under:
Chapter="Initialization"
Section="Device Initialization by ROM code"
Sub-Section="Memory Booting"
Heading="NAND"
Figure="ECC Locations in NAND Spare Areas"
[2] ecc-layout updates in u-boot
http://lists.denx.de/pipermail/u-boot/2013-November/167551.html
[3] u-boot configurations to match above ecc-layout are documented at
https://processors.wiki.ti.com/index.php/Linux_Core_NAND_User%27s_Guide
CC: <stable@vger.kernel.org> # 3.13.x+
Reported-by: Enric Balletbo Serra <eballetbo@iseebcn.com>
Tested-by: Enric Balletbo i Serra <eballetbo@gmail.com>
Tested-by: Stefan Roese <sr@denx.de>
Signed-off-by: Pekon Gupta <pekon@ti.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>