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

[Akshay Saraswat]

Hi Simon,

>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.
>

IROM USB entry point is same but the function prototype for USB download
has changed in this SoC. Vadim has already done changes to fix this issue.
I am pushing a new patch-set with that patch included. I have tested USB
download and SD boot over PV1 and 2 and both works fine for me.
Please let me know if it works at your end.

>>
>>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

Regards,
Akshay Saraswat