Hi Roy Thank you for working on this, I would like to suggest if you could implement separate control commands to switch ECC and Randomisation modes per partitions. I know this is not the best approach but it will provide more controls.
> On 8 Jun 2015, at 7:11 pm, Roy Spliet <r.spl...@ultimaker.com> wrote: > > Dear Michal, > > Op 08-06-15 om 10:54 schreef Michal Suchanek: >> On 8 June 2015 at 10:38, Roy Spliet <r.spl...@ultimaker.com> wrote: >>> Hello Michal, >>> >>> Op 07-06-15 om 18:48 schreef Michal Suchanek: >>> >>> Hello, >>> >>> On 5 June 2015 at 13:52, Roy Spliet <r.spl...@ultimaker.com> wrote: >>> >>> Based on the default layout of the android image used at least on Olimex >>> Lime >>> >>> Signed-off-by: Roy Spliet <r.spl...@ultimaker.com> >>> --- >>> include/configs/sunxi-common.h | 9 +++++++++ >>> 1 file changed, 9 insertions(+) >>> >>> diff --git a/include/configs/sunxi-common.h b/include/configs/sunxi-common.h >>> index ec28c40..b38f2f5 100644 >>> --- a/include/configs/sunxi-common.h >>> +++ b/include/configs/sunxi-common.h >>> @@ -404,8 +404,15 @@ extern int soft_i2c_gpio_scl; >>> #define BOOT_TARGET_DEVICES_USB(func) >>> #endif >>> >>> +#ifdef CONFIG_NAND >>> +#define BOOT_TARGET_DEVICES_NAND(func) func(NAND, nand , 0) >>> +#else >>> +#define BOOT_TARGET_DEVICES_NAND(func) >>> +#endif >>> + >>> #define BOOT_TARGET_DEVICES(func) \ >>> BOOT_TARGET_DEVICES_MMC(func) \ >>> + BOOT_TARGET_DEVICES_NAND(func) \ >>> BOOT_TARGET_DEVICES_SCSI(func) \ >>> BOOT_TARGET_DEVICES_USB(func) \ >>> func(PXE, pxe, na) \ >>> @@ -441,6 +448,8 @@ extern int soft_i2c_gpio_scl; >>> MEM_LAYOUT_ENV_SETTINGS \ >>> "fdtfile=" CONFIG_DEFAULT_DEVICE_TREE ".dtb\0" \ >>> "console=ttyS0,115200\0" \ >>> + "mtdids=nand0=mtd2\0" \ >>> + "mtdparts=mtdparts=mtd2:0xffc00000@0x400000(nand0_main)\0" \ >>> BOOTENV >>> >>> From what I heard the nand boot partition size should be specified in >>> nand pages rather than bytes because the boot rom loads a fixed number >>> of pages and just uses the start of each page regardless of page size. >>> >>> Although I believe you have the facts mostly right, they do not apply in >>> this situation. >>> What you are looking for is the partition definition for U-boot. At this >>> point the boot >>> rom (BROM) is no longer active and thus it's inner workings are mostly >>> irrelevant. >>> The NAND partition lay-out for the boards I have seen (various Olimex + >>> Cubietruck..) >>> are as follows: >>> 0-2MB U-Boot-SPL + U-Boot >> OK, so 0-2 MB has to be read (at least in part) by brom to load the >> SPL so it must be in the format brom understands. The part containing >> the SPL which is read by brom has certain number of pages. The u-boot >> part can contain whatever we define. >> >>> 2-4MB U-Boot SPL + U-Boot (for recovery) >>> 4MB+ Main file system >> The main filesystem has to be in format suitable for UBIFS. It has to >> follow u-boot part possibly with some space in between. >> >> If support for non-uniform flash format is not available then there >> are basically two options: >> >> 1) SPL supports brom format and u-boot binary is part of boot >> partition. SPL can read/write itself and u-boot and u-boot can >> read/write the main partition >> >> 2) SPL and u-boot support the main partition format. While u-boot is >> written to the boot partition its pages are written in the format >> suitable for ubifs. This will get hairy when you want to actually >> write u-boot and SPL. >> >> The problem with counting the partition sizes in bytes is obvious - >> whatever you do the brom reads predefined number of pages from the >> start of the nand to load the SPL and unless you know maximum page >> size of every nand ever made that is compatible with Allwinner brom >> you cannot tell what is even the maximum size of this part in bytes.] > The solution already implemented now and carried to Hans' tree is 1) > with the size of SPL aligned to 8KB blocks (the largest of the page sizes > attempted). The modes tried by BROM are listed in [1]. SPL currently > tries only a single mode whose params are defined in sunxi-common.h, > but this is likely to change to a "brute-force" approach to resemble > BROM in the near future. > Yours, > > Roy >> >> Thanks >> >> Michal > > [1] https://linux-sunxi.org/NAND > > -- > > > IMAGINE IT >> MAKE IT > > Meet us online at Twitter <http://twitter.com/ultimaker>, Facebook > <http://facebook.com/ultimaker>, Google+ <http://google.com/+Ultimaker> > > www.ultimaker.com > > -- > You received this message because you are subscribed to the Google Groups > "linux-sunxi" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to linux-sunxi+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
