BPI-R2 won't boot from SD Card after flashing BPI-R2-EMMC-boot0-DDR1600-20191024-0k.img.gz

furumc · September 29, 2020, 12:28pm

Hi teammates,

after flashing EMMC with BPI-R2-EMMC-boot0-DDR1600-20191024-0k.img.gz it won’t boot anymore from SD. I know it sounds curious to mention EMMC and SD-CARD in respect of booting but I’ll describe what happened :

running OS from SD-CARD since a while ago
decided to move some part of OS from SD-CARD to EMMC
activated write mode on /dev/mmcblk1boot0
checked config with mmc extcsd read /dev/mmcblk1 | grep PARTITION_CONFIG
with bpi-bootsel I’ve flashed BPI-R2-EMMC-boot0-DDR1600-20191024-0k.img.gz onto EMMC
that is the point where I stucked, because I had to reboot, and since then my system is not working!
it was a plan further migrating from SD-CARD to EMMC

I suspect that I flashed accidentally the preloader to the SD-CARD!

After that I made a new SD-CARD with a pure system, and flashed preloader in the way what Frank-w exactly suggested :

gunzip -c BPI-R2-EMMC-boot0-DDR1600-0k-0905.img.gz | sudo dd of=/dev/mmcblk1boot0 bs=1024 seek=0

From this point, BPI-R2 can boot, but obviously there is no OS or anything on EMMC. With the old one ( SD-CARD ), I can’t boot neither from EMMC nor SD-CARD!

I would like to use the OS from SD-CARD again, at best could be migrated onto EMMC.

How should/could I do?

frank-w · September 29, 2020, 1:54pm

Have you checked boot-switch? its position defines first location where bootrom looks for preloader. If it is set to 0 and emmc has preloader installed it will not boot sdcard. So it should be set to 1 to allow sdcard boot (boot sd if it has preloader,if not try emmc)

furumc · September 29, 2020, 2:31pm

If I attach the old SD-CARD, bpi-r2 doesn’t do anything, no UART, no HDMI, just light 3 leds out! With the new SD-CARD it boots. Without SD-CARD I get U-Boot Menu. It’s similar if I delete EMMC partitions. I think somehow the old SD-CARD consists wrong settings. Therefore if boot-switch was set 0, it wouldn’t boot with the new SD-CARD, but I might think it wrong!

frank-w · September 29, 2020, 4:58pm

Maybe your old sd has broken preloader or other headers (boot0/1). If these 3 are there the first output is visible on debug uart

If it works with new sd card all is good now,am i right?

furumc · September 29, 2020, 5:19pm

Unfortunately just partially!

I would like to use it furthermore, because of the kernel and invested work in root fs! I have backup images of boot and root made from old SD-CARD. Now I’m trying install your pure buster image, and than take a backup boot/root. In this way, broken preloader or/and other headers could be fixed.

My main focus is using this kernel and settings, packages, etc…

frank-w · September 29, 2020, 5:31pm

You could dd the first 1M of my image to yours,if you have not changed partition layout (or first 320k if you want to leave your uboot)

furumc · September 29, 2020, 7:41pm

DD-ing the first 1M solved my problem!

Thank you Frank!

frank-w · September 30, 2020, 1:47pm

remember for migrating from sd to emmc you have to configure uboot and your system to use the right device/partition

furumc · September 30, 2020, 6:48pm

Let’s say I can apply this patch with dd onto /dev/mmcblk1boot0 :

BPI-R2-EMMC-boot0-DDR1600-20191024-0k.img.gz

After that on running system I can do this :

mmc bootpart enable 1 1 /dev/mmcblk1
mmc extcsd read /dev/mmcblk1 | grep PARTITION_CONFIG

Making partitions with :

 sfdisk /dev/mmcblk1 
 start=   204800, size=   524288, Id= c
 start=   729088, size= 14540800, Id=83
 mkfs -t vfat /dev/mmcblk1p1
 mkfs -t ext4 /dev/mmcblk1p2
 mkdir -p /mnt/emmc/boot
 mkdir -p /mnt/emmc/root
 mount /dev/mmcblk1p1 /mnt/emmc/boot
 mount /dev/mmcblk1p2 /mnt/emmc/root

Modify fstab :

/dev/mmcblk1p2 / ext4 errors=remount-ro 0 1 /dev/mmcblk1p1 /boot vfat defaults 0 0

And finally BOOT and ROOT should be copied and synced via rsync or tar or cp:

rsync -aAXv --exclude={"/dev/","/proc/","/sys/","/tmp/","/run/","/mnt/","/media/","/lost+found","/boot/"} / /mnt/emmc/root/

mkdir -p /mnt/emmc/boot/bananapi/bpi-r2/linux
cp /boot/bananapi/bpi-r2/linux/uImage /mnt/emmc/boot/bananapi/bpi-r2/linux
mkdir -p /mnt/emmc/root/lib/modules/
cp -r /lib/modules/$(uname -r) /mnt/emmc/root/lib/modules/

But what if my uEnv.txt consist just one line, is it okay ?

kernel=uImage_5.4.51-main

frank-w · September 30, 2020, 7:27pm

You also need to set root

github.com

frank-w/u-boot/blob/2020-04-bpi/uEnv_r2.txt#L16


partition=1:1
bootenv=uEnv.txt
kernel=uImage
loadaddr=0x80200000
#default bootargs will be overidden by buildargs
bootargs=console=ttyS0,115200 root=/dev/mmcblk0p2 rw rootwait ip=dhcp


kernel414=uImage_4.14.91-main


console=earlyprintk console=ttyS0,115200
root=/dev/mmcblk0p2 rootfstype=ext4 rootwait
bootopts=vmalloc=496M debug=7 initcall_debug=0
graphic=video=1920x1080 console=tty1 fbcon=map:0 drm.debug=0x7


buildargs=setenv bootargs "board=${board} ${console} root=${root} ${bootopts} ${graphic}"


checkenv=test -e ${device} ${partition} ${bpi}/${board}/${service}/${bootenv}
importenv=env import -t ${scriptaddr} ${filesize}
loadbootenv=if fatload ${device} ${partition} ${scriptaddr} ${bpi}/${board}/${service}/${bootenv};then run importenv;else echo "fatload (${bootenv}) failed";fi
resetenv=env default -a;printenv;

Partition should be set by my checks (first try sd than emmc)

furumc · October 1, 2020, 2:40pm

It’s absolutely great! Working!

If I attach an SD-CARD, it boots and displays Booting from SD. If I detach it, it starts up and shows Booting from Emmc.

Thank you Frank!

frank-w · October 1, 2020, 3:37pm

This is done by uboot env variable selectmmc/checksd,which checks for sdcard and if none is inserted it uses emmc

github.com

frank-w/u-boot/blob/2020-04-bpi/uEnv_r2.txt#L28


graphic=video=1920x1080 console=tty1 fbcon=map:0 drm.debug=0x7


buildargs=setenv bootargs "board=${board} ${console} root=${root} ${bootopts} ${graphic}"


checkenv=test -e ${device} ${partition} ${bpi}/${board}/${service}/${bootenv}
importenv=env import -t ${scriptaddr} ${filesize}
loadbootenv=if fatload ${device} ${partition} ${scriptaddr} ${bpi}/${board}/${service}/${bootenv};then run importenv;else echo "fatload (${bootenv}) failed";fi
resetenv=env default -a;printenv;


checksd=fatinfo ${device} 1:1
selectmmc=if run checksd; then echo Boot from SD ; setenv partition 1:1;else echo Boot from eMMC; setenv partition 0:1 ; fi;


newboot=run buildargs;printenv bootargs;fatload ${device} ${partition} ${loadaddr} ${bpi}/${board}/${service}/${kernel}; bootm


reloadmenu=run selectmmc;if run checkenv; then run loadbootenv; else echo file not found; fi;bootmenu;


lskernel=ls ${device} ${partition} ${bpi}/${board}/${service};
lsdtb=ls ${device} ${partition} ${bpi}/${board}/${service}/dtb
askkernel=askenv kernelinput "enter uImage-name:";
askdtb=askenv dtbinput "enter dtb-name:";
askuboot=askenv ubootinput "enter uboot-name:";

That is where i set partition to load kernel from. But i do not set root because in mainline-kernel emmc is 0 (like uboot) but in my and bpi kernels it is 1 (and sdcard is 0)