[U-Boot] Tegra board problems

[Stephen Warren]

On 11/24/2014 09:03 PM, Simon Glass wrote:
> Hi,
>
> I'm a bit messed up with my testing now.
>
> 1. Jetson-TK1: While I2C testing I unfortunately erased part of the
> I2C board ID EEPROM, and now it will not boot. It says:
>
> Dummy read for TPS65913
> Board id = 0x1ff
>
> and then dies. I can probably change the board id back, but I'm not
> sure what it should be! It will boot U-Boot but not the AVP boot
> loader. If someone could list out the contents of their EEPROM (bus 1,
> address 56) that might help.

"AVP boot loader" isn't quite the right term; all bootloaders on Tegra 
start out execution on the AVP, and typically transition to the main CPU 
(CCPLEX). "fastboot" is unfortunately (since it's also a protocol name) 
the term we typically use for the Android/L4T/binary bootloader on this 
chip.

Here's my ID EEPROM dump; I don't recall if there's a serial number in 
here, or just board type identification. It probably doesn't matter 
either way though.

(I2C bus IDs are different in Linux I guess)
# i2cdump -f -y 0 0x56
No size specified (using byte-data access)
      0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f    0123456789abcdef
00: 01 00 07 00 77 01 00 00 03 42 00 ff ff ff ff ff    ?.?.w?..?B......
10: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff    ................
20: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff    ................
30: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff    ................
40: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff    ................
50: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff    ................
60: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff    ................
70: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff    ................
80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff    ................
90: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff    ................
a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff    ................
b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff    ................
c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff    ................
d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff    ................
e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff    ................
f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff    ................

> 2. beaver: I cannot get mainline U-Boot to boot a kernel. In fact
> 'part list mmc 0' just prints an error:
>
> ## Unknown partition table
>
> It is getting a partition ID of 0. Is there something wrong with
> Beaver's mmc support in mainline?
>
> The old 2011 U-Boot on the board works though.

Hmm. I haven't tried very recent U-Boot on Beaver; let me check.

> Also a question - are there any Jetson-like Tegra 132 boards available yet?

Not that I know of. Nexus 9 seems to be the best bet, although it's not 
useful for bootloader work.