As there were parallel set of patches running between u-boot and kernel.
hence, some patch-sets caused regression for OMAP3x platforms when booting
using u-boot specifically for ecc-schemes (like BCH4_SW).
Hence this patch series fixes those regressions, and tests complete
NAND boot sequence for multiple ecc-schemes on AM335x-EVM board.
(following configurations are required for building u-boot driver which is
compatible to kernel ecclayout for selected ecc-scheme)
(BCH8_HW) (HAM1_HW) (HAM1_HW) (HAM1_HW) (UBIFS)
ROM ---------> SPL ---------> U-Boot ---------> Kernel ---------> File-System
(BCH8_HW) (BCH8_SW) (BCH8_SW) (BCH8_SW) (UBIFS)
ROM ---------> SPL ---------> U-Boot ---------> Kernel ---------> File-System
(BCH8_HW) (BCH8_HW) (BCH8_HW) (BCH8_HW) (UBIFS)
ROM ---------> SPL ---------> U-Boot ---------> Kernel ---------> File-System
*Configurations used to build u-boot and kernel for end-to-end NAND boot*
+------------+--------------------------------------------+------------------+
| ecc-scheme | u-boot/SPL configs | kernel DTS |
+------------+--------------------------------------------+------------------+
| | | |
| HAM1_HW | #define CONFIG_NAND_OMAP_ECCSCHEME \ |ti,nand-ecc-opts= |
| | OMAP_ECC_HAM1_CODE_HW | "ham1" |
| (1-bit | #define CONFIG_SYS_NAND_ECCBYTES 3 | |
| Hamming | #define CONFIG_SYS_NAND_ECCPOS \ | |
| using h/w) | { 1, 2, 3, 4, 5, 6, 7, 8, 9, \ | |
| | 10, 11, 12 } | |
| | (for NAND page-size=2048) | |
| | | |
+------------+--------------------------------------------+------------------+
| | | |
| BCH8_SW | #define CONFIG_NAND_OMAP_ECCSCHEME \ |ti,nand-ecc-opts= |
| | OMAP_ECC_BCH8_CODE_HW_DETECTION_SW | "bch8" |
|(8-bit BCH | #define CONFIG_SYS_NAND_ECCBYTES 13 |(without ELM node)|
| using s/w | #define CONFIG_BCH | |
|library for | #undef CONFIG_SPL_NAND_AM33XX_BCH | |
|for ECC | #define CONFIG_SPL_NAND_SIMPLE | |
| error | #define CONFIG_SYS_NAND_ECCPOS \ | |
|correction) | {2, 3, 4, 5, 6, 7, 8, 9, 10, \ | |
| | 11, 12, 13, 14, \ | |
| | 16, 17, 18, 19, 20, 21, 22, 23, 24, \ | |
| | 25, 26, 27, 28, \ | |
| | 30, 31, 32, 33, 34, 35, 36, 37, 38, \ | |
| | 39, 40, 41, 42, \ | |
| | 44, 45, 46, 47, 48, 49, 50, 51, 52, \ | |
| | 53, 54, 55, 56, } | |
| | (for NAND page-size=2048) | |
| | #define CONFIG_SYS_NAND_ECCSIZE 512 | |
| | | |
+------------+--------------------------------------------+------------------+
| | | |
| BCH8_HW | #define CONFIG_NAND_OMAP_ECCSCHEME \ |ti,nand-ecc-opts= |
| | OMAP_ECC_BCH8_CODE_HW | "bch8" |
|(8-bit BCH | #define CONFIG_SYS_NAND_ECCBYTES 14 | |
| using ELM | #define CONFIG_SPL_NAND_AM33XX_BCH |(with ELM node) |
| h/w engine | #define CONFIG_SYS_NAND_ECCPOS \ |ti,elm-id=<&elm> |
|for ECC | {2, 3, 4, 5, 6, 7, 8, 9, \ | |
| error | 10, 11, 12, 13, 14, 15, 16, 17, \ | |
|correction) | 18, 19, 20, 21, 22, 23, 24, 25, \ | |
| | 26, 27, 28, 29, 30, 31, 32, 33, \ | |
| | 34, 35, 36, 37, 38, 39, 40, 41, \ | |
| | 42, 43, 44, 45, 46, 47, 48, 49, \ | |
| | 50, 51, 52, 53, 54, 55, 56, 57, } | |
| | (for NAND page-size=2048) | |
| | #define CONFIG_SYS_NAND_ECCSIZE 512 | |
| | | |
+------------+--------------------------------------------+------------------+
#* In addition following patches need to be pulled for u-boot:
http://lists.denx.de/pipermail/u-boot/2013-December/168506.html
http://lists.denx.de/pipermail/u-boot/2013-December/169021.html
Test1: flash ubi image from u-boot and boot the kernel
U-boot> mw 0x82000000 0xff <u-boot.img size aligned to NAND block boundary>
U-boot> fatload mmc 0 0x82000000 u-boot.img
U-boot> nand erase <u-boot_offset> <u-boot.img size>
U-boot> nand write 0x82000000 <u-boot_offset> <u-boot.img size>
U-boot> setenv bootargs 'console=ttyO0,115200n8 noinitrd mem=256M \
root=ubi0 rw rootfstype=ubifs ubi.mtd=<mtdpart-of-rootfs>,\
<page-size> ip=off init=/init'
U-boot> bootm <kernel_offset>
Test2: update u-boot.img from kernel and re-boot
Kernel> flash_erase /dev/<mtdpart-of-u-boot> 0 0
Kernel> nandwrite -s 0 /dev/<mtdpart-of-u-boot> u-boot.img
Kernel> reboot
Signed-off-by: Pekon Gupta <pekon@xxxxxx>
---
drivers/mtd/nand/omap2.c | 33 +++++++++++++++++++++++++--------
1 file changed, 25 insertions(+), 8 deletions(-)
Pekon Gupta (2):
mtd: nand: omap: fix ecclayout->oobfree->offset
mtd: nand: omap: fix ecclayout to be in sync with u-boot NAND driver
drivers/mtd/nand/omap2.c | 50 ++++++++++++++++++++++++++++--------------------
1 file changed, 29 insertions(+), 21 deletions(-)
--
1.8.1
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