[U-Boot] [PATCH v2 0/6] Addition of new board Peach-Pi

[Akshay Saraswat]

Hi Simon,

Apologies for the delay in reply. I was out of office.

>Hi Akshay,
>
>
>On 17 October 2014 11:52, Simon Glass wrote:
>>
>> Hi Akshay,
>>
>> On 15 October 2014 18:38, Akshay Saraswat wrote:
>> > Now we are adding a new Peach-Pi board which is a variant of Peach-Pit
>> > and is based on Exynos5800. Exynos5800 itself is a variant of Exynos5420,
>> > hence, most of the hardware config and settings are reused for this board.
>> >
>> > Changes since v1:
>> >         - Rebased all the patches.
>>
>> Sadly this still doesn't work for me. I'll try to debug it.
>
>Here's what I found. I am using Pi MP dated in April.
>
>1. It won't boot at all with the patches, but if I change ARM
>frequency in the device tree from 1700 MHz to 900 MHz then it will
>boot into SPL OK. This is the same issue as I have on Pit. I'm not
>sure why this is. See U-Boot mainline commit e4d7610 for what I did.
>

I don't know why this is happening because, as far as I know, right
now we are running both 5420 and 5800 at 900 MHz. We are not using
dmc node to extract and scale to the max freq value. I will check
again and fix any side effects due to this.

>2. USB boot hangs in the IROM - it gets as far as calling the IROM to
>load from USB, but dies in the IROM and does not return. So USB loads
>BL1, BL2 but will not load U-Boot. I wonder if the IROM USB entry
>point has changed for this chip?

No, as far as I know, IROM USB entry points are same because we are
using same entry point in firmware-pit-4482.B branch, which works fine.

>
>3. SD boot works OK and gets as far as U-Boot, but it dies inside
>initcall_run_list() called from board_init_f(). It seems to crash on
>the first function call. I can't really explain that at all. The first
>call is to setup_mon_len() and if I call that explicitly then it works
>fine.

On my board SD boot works fine and I see U-Boot prompt everytime I boot.

>
>So I wonder if the SDRAM init is broken in some way, and there is some
>other problem with USB.
>

I compared and found SDRAM init same as the one in firmware-pit-4482.B
branch. It should not be the cause.

>In terms of testing with USB download, you should be able to use a
>simple script that calls smdk_usbdl three times, once each with BL1,
>BL2 and U-Boot. You might need a short sleep before the first one. I
>can help you debug cros_bundle_firmware but at present there is not
>much point since there seems to be some other problem.
>

I changed download_list in ExynosFlashImage of write_firmware.py
script to load my bins instead of the ones residing in firmware
directory. It works fine for Pit but for Pi, it fails while loading
u-boot-dtb.bin and EC log shows "XPSHOLD not seen in time" which is
very strange because if SPL was not executed who was trying to download
u-boot binary. 
I will now try to fix this download failure.

>Regards,
>Simon

I couldn't find any MP board here.
Tested these patches over PV1 and PV2.

Steps I followed for testing -

$ make peach-pi_config
$ make -j32
$ sudo dd if=u-boot.bl1.bin of=/dev/sdc bs=512 seek=1
$ sudo dd if=spl/smdk5420-spl.bin of=/dev/sdc bs=512 seek=17
$ sudo dd if=u-boot-dtb.bin of=/dev/sdc bs=512 seek=49

Console Log -

U-Boot 2014.10-rc2-17295-g8ecd390-dirty (Oct 30 2014 - 17:23:07) for Peach-Pi
CPU:	Exynos5800 at 900MHz
Board: Samsung/Google Peach Pi board based on Exynos5800
I2C:   ready
DRAM:  3.5 GiB
trace: copying 0008bb3c bytes of early data from 50000000 to febfb000
trace: enabled
MMC:   EXYNOS DWMMC: 0, EXYNOS DWMMC: 1
SF: Detected W25Q32DW with page size 256 Bytes, erase size 4 KiB, total 4 MiB
TPS65090 PMIC EC init
exynos_lcd_power_on: ps8625_init() failed
DP Change lane bw to 1.62Gbps
DP dp_sw_link_traning() failed
DP link training fail
In:    serial
Out:   lcd
Err:   lcd
Net:   No ethernet found.
Hit any key to stop autoboot:  0 
Peach-Pi # 
Peach-Pi # 

Thanks & Regards,
Akshay Saraswat