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03:07
<
levd >
naobsd: I'd like to erase the bootloader on eMMC using Rockchip's upgrade_tool:
03:07
<
levd >
EraseBlock:EB <CS> <BeginBlock> <BlokcLen> [--Force]
03:07
<
levd >
What's <CS> for?
03:13
<
naobsd >
levd: I guess it's "Chip Select"? try "RFI" comman in upgrade_tool interactive mode
03:13
<
naobsd >
Flash CS: Flash<0>
03:14
<
naobsd >
CS should be 0 in this case
03:15
<
naobsd >
btw erase (upgrade_tool eb) may not work on some(eMMC, I guess) case
03:15
<
levd >
then how can I erase the bootloader?
03:17
<
levd >
In upgrade_tool interactive mode, it does not complain CS value.
03:18
<
naobsd >
that's what I tried very recently :) I did "dd if=/dev/zero of=/dev/mmcblk0 ..." from running system on firefly. can you boot any system on the board you want to erase?
03:18
<
naobsd >
or broken bootloader prevents booting?
03:19
<
levd >
I'd like to fix the problem with broken bootloader.
03:21
<
naobsd >
then you cannot run any system?
03:23
<
levd >
yes, i can run. your command works.
03:24
<
naobsd >
if my memory is correct, first 4MiB is the area for loader
03:25
<
levd >
Ethernet and HDMI work like a charm.
03:25
<
naobsd >
and sorry, it also contain serial number, you need to restore it if you erased whole 4MiB area...
03:27
<
naobsd >
to stop booting broken loader, erasing few sectors should be enough...
03:27
<
naobsd >
# dd if=/dev/zero of=/dev/mmcblk0 seek=$((0+64)) count=1 conv=fsync
03:27
<
naobsd >
# dd if=/dev/zero of=/dev/mmcblk0 seek=$((1024+64)) count=1 conv=fsync
03:27
<
naobsd >
# dd if=/dev/zero of=/dev/mmcblk0 seek=$((2048+64)) count=1 conv=fsync
03:27
<
naobsd >
# dd if=/dev/zero of=/dev/mmcblk0 seek=$((3072+64)) count=1 conv=fsync
03:27
<
naobsd >
# dd if=/dev/zero of=/dev/mmcblk0 seek=$((4096+64)) count=1 conv=fsync
03:27
<
naobsd >
this erases header at sector 64 and its 4 backups
03:29
<
naobsd >
or, enforcing mask rom mode & reflash working bootloader might be another answer
03:29
<
naobsd >
but I never tried to enforce mask rom mode on firefly
03:29
<
naobsd >
I can see description about test points named T13/T14 in eMMC page in schematic pdf
03:30
<
naobsd >
I guess if T13-T14 is connected when power-on, it enforces mask rom mode
03:31
<
naobsd >
btw, working ethernet and hdmi, sounds good :)
03:32
<
levd >
Thanks for the detailed instructions.
03:32
<
naobsd >
if you know how to enforce mask rom mode, please tell me ;)
03:36
<
naobsd >
levd: btw, boot loader binary in firefly firmware images supports mainline kernel?
03:37
<
naobsd >
I think u-boot source tree in Rockchip SDK doesn't support it, and I'm not sure which u-boot is used for firefly firmware images
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03:52
<
levd1 >
RKTools/bootloader/uboot-emmc/RK3288Loader_uboot_V2.17.02.bin is used in the firefly firmware.
03:52
<
levd1 >
I try the mainline kernel using the linux-rockchip uboot.
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09:26
<
realloverme >
hello everybody
09:27
<
realloverme >
i want to get rkimage from a tablet pc
09:27
<
realloverme >
its chip is rockchip rk 2928g
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<
realloverme >
are you here
09:34
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09:36
<
realloverme >
are you here
09:36
<
realloverme >
please answer me
09:36
<
realloverme >
i want to get rkimage from a rockchip tablet
09:37
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09:51
<
realloverme >
hello
09:51
<
realloverme >
rockchip lovers
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<
naobsd >
levd: thanks!
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