From mboxrd@z Thu Jan 1 00:00:00 1970 From: Roy Spliet Date: Fri, 22 May 2015 09:04:36 +0200 Subject: [U-Boot] Proposal to add NAND-boot support for Sunxi SPL In-Reply-To: <8f6eb28e-558d-4ac9-ad95-e5c6be4cb870@googlegroups.com> References: <1432216765-8421-1-git-send-email-r.spliet@ultimaker.com> <555E1F0F.5000001@redhat.com> <8f6eb28e-558d-4ac9-ad95-e5c6be4cb870@googlegroups.com> Message-ID: <555ED504.6020904@ultimaker.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de Hello, For my set-up I made use of Boris Brezillon's sunxi-nand tree[1], or actually I rebased his patches on top of 4.0rc7. This basically adds support for NAND-chip partitioning, ECC and randomisation. Docs for the DT specification in Documentation/devicetree/bindings/mtd/sunxi-nand.txt , and an example can be found in arch/arm/boot/dts/sun7i-a20-cubietruck.dts . [2] lists the acceptable configuration options for the boot and boot_rescue partitions, make sure to pick one of these (which should be no problem for MLC-type nand). The ECC mode for these boot partitions is called hw_syndrome. Assuming you now have a Linux set-up kernel based on this tree with NAND support on an MMC, for U-boot what you should currently do is: 1) in include/configs/sunxi-common.h, adjust the parameters PAGE_SIZE, ECC_STEP, ECC_STRENGTH to match your NAND chip and DT configuration. 2) Build 3) Use your MMC to flash u-boot-sunxi-with-spl.bin onto NAND: # flash_erase /dev/mtd0 # nandwrite -p /dev/mtd0 u-boot-sunxi-with-spl.bin 4) Reboot without the MMC card and see U-boot load That should be all. @Alex: To answer your question specifically: It's likely that the parameters in sunxi-common.h mentioned above might not match your NAND-chip configuration in the Linux kernel. I can't tell you precisely how to fetch these details from the 3.4 kernel, sorry. I recall Daniel using 24-bit strength ECC with otherwise equal parameters, but perhaps he can help you with this better than I can. Cheers, Roy [1] https://github.com/bbrezillon/linux-sunxi/commits/sunxi-nand [2] https://linux-sunxi.org/NAND#More_information_on_BROM_NAND Op 22-05-15 om 04:23 schreef kaplan2539 at gmail.com: > Hi Roy, > > I could definitely use such a howto. I have applied the patches to the > current mainline u-boot head and try to boot my A13-OlinXino Wifi > board in FEL mode. > I can compile and boot into u-boot via FEL. However, I get these > errors when I have CONFIG_SPL_NAND_SUPPORT defined: > > U-Boot SPL 2015.07-rc1-00276-g77792f9-dirty (May 21 2015 - 19:15:54) > DRAM: 512 MiB > Failed to set core voltage! Can't set CPU frequency > sunxi board_nand_init() > Nand initialised > Error: 1 ECC failures detected > Error: 512 ECC failures detected > > This is my configs/A13-OLinuXino_defconfig looks like this: > CONFIG_SYS_EXTRA_OPTIONS="CONS_INDEX=2,AXP209_POWER,USB_EHCI,SYS_MAX_NAND_DEVICE=1,SYS_NAND_BASE=0x00" > CONFIG_NAND=y > CONFIG_SUNXI_NAND=y > CONFIG_SUNXI_DMA=y > CONFIG_CMD_NAND=y > CONFIG_SPL_NAND_SUPPORT=y > CONFIG_SPL=y > CONFIG_FDTFILE="sun5i-a13-olinuxino.dtb" > CONFIG_USB1_VBUS_PIN="PG11" > CONFIG_VIDEO_HDMI=n > CONFIG_VIDEO_VGA_VIA_LCD=y > CONFIG_VIDEO_VGA_VIA_LCD_FORCE_SYNC_ACTIVE_HIGH=y > # For use with the Olimex 7" LCD module, adjust timings for other > displays > # Set video-mode=sunxi:800x600-24 at 60,monitor=lcd in the env. to enable > CONFIG_VIDEO_LCD_MODE="x:800,y:480,depth:18,pclk_khz:33000,le:16,ri:209,up:22,lo:22,hs:30,vs:1,sync:3,vmode:0" > CONFIG_VIDEO_LCD_POWER="AXP0-0" > CONFIG_VIDEO_LCD_BL_PWM="PB2" > CONFIG_ARM=y > CONFIG_ARCH_SUNXI=y > CONFIG_MACH_SUN5I=y > CONFIG_DRAM_CLK=408 > CONFIG_DRAM_ZQ=123 > CONFIG_DRAM_EMR1=0 > CONFIG_DEFAULT_DEVICE_TREE="sun5i-a13-olinuxino" > > I just found out in the sun5i-a13-olinuxino.dts file are no nand settings. > I guess I can find the information in the linux-sunxi 3.4 kernels fex > file for the olinuxio and need to convert to dts, correct? > > I am happy about any hints / comments. > > Thanks > Alex > > > > On Thursday, May 21, 2015 at 11:08:24 AM UTC-7, Hans de Goede wrote: > > Hi Roy, > > On 21-05-15 15:59, Roy Spliet wrote: > > The following patches take the work by Daniel Kochm?nski, and > make some > > heavy modifications for readability and functionality, based on > Boris > > Brezillon's Linux driver. Tested on an Olimex Lime w/ A20. > > Patches are sent as RFC. Open questions: > > - Config options added are partially NAND-chip specific. Some > options can > > be autodetected based on the NAND ID, others require either > brute-forcing > > or config options like these. Do they belong in sunxi-common? > Should > > we make a Kconfig option for this? If bikeshedding is desired, > are defines > > in sunxi-common.h good enough for now? > > - Style is mostly kernel-like. Satisfied? > > - Daniel: do you think we can work from here? > > > > Please comment away! > > Cool stuff. Overall this looks good I'll reply with more detailed > feedback > to your individual patches, 2 questions: > > 1) Can you provide a quick howto (at developer level) on how to > actually > get the spl and u-boot into the nand, what I'm looking for is > unstructions > like this: > > a) Take this git repo + branch, build a kernel from it > b) Look at this dts file for a nand settings example, adjust it > for your board > c) Once booted into the kernel using an updated dts you should > have these > block devices, dd spl to this one, and u-boot to this one. > > No more to go more detailed then that :) > > 2) What is the plan to add support for loading files from nand in > u-boot proper, > so that we can get (e.g.) extlinux.conf + kernel +dtb from a /boot > on nand ? > > Regards, > > Hans > -- IMAGINE IT >> MAKE IT Meet us online at Twitter , Facebook , Google+ www.ultimaker.com