Hi Pekon,
On Mon, Feb 17, 2014 at 01:11:22PM +0530, Pekon Gupta wrote:
*changes v2 -> v3*
- re-ordered the patch-set so that eccpos[] is fixed before 'oobfree'
- marked for stable 3.13.x+
*changes v1 -> v2* [PATCH 1/3] fix oobfree->offset calculation + adjust for reserved-marker of last sector [PATCH 2/3] <new patch> [PATCH 3/3] refactor code as suggested by Brian Norris computersforpeace@gmail.com
*original v1* [PATCH 1/2] http://lists.infradead.org/pipermail/linux-mtd/2013-December/050946.html [PATCH 2/2] http://lists.infradead.org/pipermail/linux-mtd/2013-December/050945.html
This patch-set is tested on AM335x-EVM using following end-to-end boot sequence with appropriate u-boot configs [1]
(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
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
[1] u-boot configurations to match above ecc-layout are documented at https://processors.wiki.ti.com/index.php/Linux_Core_NAND_User%27s_Guide
Pushed to linux-mtd.git. I plan to send this to Linus in the 3.14-rc. Thanks!
If you get the time, can you submit some documentation for Documentation/mtd/nand/?
Brian