[U-Boot] u-boot on raspberry pi cm3

[Jan Leonhardt]

Hello List,

i am new here and in embedded development (more a Javascript/Java developer)

currently i have to port android to an raspberry pi cm3 and like to use
u-boot.

what works already:
* boot into u-boot
* boot into android
* boot into u-boot into android

so far so good. now i have to store a variable into the environment of
u-boot. here i got stuck. any try to write somewhere from u-boot leads
in a endless loop of the following message:
fsm 1, hsts 00000001

it doesn't matter if i use saveenv, fatwrite or ext4write

some google result on that says the sd-card is bat and should be
changed. but on cm3 there is no sd-card. its a flash storage directly on
the compute module itself. and i tried more than on module. all with the
same result. and i can write in usb-storage mode from any other device
and from inside the booted android to this storage. so i think there
might be a fundamental problem with writing to the flash from u-boot.

does anybody have some hints/points to look into?

i tried current master (v2018.05) and next branches. same result.


here some serial output:

U-Boot 2018.05-00181-g62d77cea31-dirty (May 14 2018 - 13:41:23 +0200)

DRAM:  944 MiB
RPI Compute Module 3 (0xa020a0)
MMC:   mmc at 7e202000: 0, sdhci at 7e300000: 1
Loading Environment from FAT... WARNING at
drivers/mmc/bcm2835_sdhost.c:435/bcm2835_send_command()!
WARNING at drivers/mmc/bcm2835_sdhost.c:435/bcm2835_send_command()!
*** Warning - bad CRC, using default environment

Failed (-5)
In:    serial
Out:   vidconsole
Err:   vidconsole
Net:   No ethernet found.
starting USB...
USB0:   scanning bus 0 for devices...
Error: smsc95xx_eth address not set.
2 USB Device(s) found
       scanning usb for storage devices... 0 Storage Device(s) found
Hit any key to stop autoboot:  0
WARNING at drivers/mmc/bcm2835_sdhost.c:435/bcm2835_send_command()!
WARNING at drivers/mmc/bcm2835_sdhost.c:435/bcm2835_send_command()!
switch to partitions #0, OK
mmc0(part 0) is current device
Scanning mmc 0:1...
Found U-Boot script /boot.scr.uimg
4489 bytes read in 3 ms (1.4 MiB/s)
## Executing script at 02000000
Loading uImage...
6143256 bytes read in 785 ms (7.5 MiB/s)
Loading uRamdisk...
1562965 bytes read in 202 ms (7.4 MiB/s)

-- 
Mit freundlichen Grüßen / With kind regards

Jan Leonhardt

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