Ariaboard G2E Guide

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Spec

CPU Dual Cortex®[email protected]
GPU PowerVR GE8300@600MHz
RAM 4x512M DDR3L@1856MHz
USB 1xUSB 3.0, 1xUSB 2.0
Video Output 1xHDMI(From RGB), 2xLVDS
Ethernet RGMII 1Gbps
External port PCI-E x1
Storage eMMC 16G, SD Card slot

Image Installation

Ubuntu 20.04 pre-install apts

apt install git build-essential flex bison

Fetch RZ/G2E Linux SDK

git clone ****/rzg2-linux-sdk.git
cd rzg2-linux-sdk
git submodule update --init

Build RZG2 Flash Burner

cd rzg2-flash-writer
./build-g2e-emmc.sh

Build ARM Trusted Firmware

cd arm-trusted-firmware
./build-ek874-emmc.sh

Build U-Boot

cd renesas-u-boot-cip
./build-g2e-emmc.sh

Boot Flash Burner from serial port

Set serial port of PC to 115200bps, 8N1. Set boot mode of board to download mode. Connect Debug port of board to the serial port of PC. Power on the board, then something like "please send !" will be printed on terminal.

Upload file rzg2-flash-writer/AArch64_output/AArch64_Flash_writer_SCIF_DUMMY_CERT_E6300400_ek874.mot with ASCII mode. After uploading, prompt ">" will appear in terminal.

Install ARM Trusted Firmware & U-Boot

Filename Program Top Address eMMC Save Partition eMMC Save Sectors Description
arm-trusted-firmware/deploy/bootparam_sa0.srec E6320000 boot partition1 000000 Loader(Boot parameter)
arm-trusted-firmware/deploy/bl2.srec E6304000 boot partition1 00001E Loader
arm-trusted-firmware/deploy/cert_header_sa6.srec E6320000 boot partition1 000180 Loader(Certification)
arm-trusted-firmware/deploy/bl31.srec 44000000 boot partition1 000200 ARM Trusted Firmware
renesas-u-boot-cip/deploy/u-boot-elf.srec 50000000 boot partition2 000000 U-boot

Use EM_W command to write S-record file into eMMC. e.g: 

>EM_W
EM_W Start --------------
---------------------------------------------------------
Please select,eMMC Partition Area.
 0:User Partition Area   : 30535680 KBytes
  eMMC Sector Cnt : H'0 - H'03A3DFFF
 1:Boot Partition 1      : 16384 KBytes
  eMMC Sector Cnt : H'0 - H'00007FFF
 2:Boot Partition 2      : 16384 KBytes
  eMMC Sector Cnt : H'0 - H'00007FFF
---------------------------------------------------------
  Select area(0-2)>1                                         <<<< Enter "1" here
-- Boot Partition 1 Program -----------------------------
Please Input Start Address in sector :0000                   <<<< Enter "0000" here
Please Input Program Start Address : E6320000                <<<< Enter "E6320000" here
Work RAM(H'50000000-H'50FFFFFF) Clear....
please send ! ('.' & CR stop load)
SAVE -FLASH.......
EM_W Complete!

eMMC Boot Settings

Please note that for eMMC booting, the following EXT_CSD registers need to be modified: 

EXT_CSD[B1] = 0x0A
EXT_CSD[B3] = 0x08

Use EM_SECSD command to modify EXT CSD registers: 

>EM_SECSD
  Please Input EXT_CSD Index(H'00 - H'1FF) :b1
  EXT_CSD[B1] = 0x00
  Please Input Value(H'00 - H'FF) :a
  EXT_CSD[B1] = 0x0A

>EM_SECSD
  Please Input EXT_CSD Index(H'00 - H'1FF) :b3
  EXT_CSD[B1] = 0x00
  Please Input Value(H'00 - H'FF) :8
  EXT_CSD[B1] = 0x08

Check Bootloader

Power off the board. Set boot mode to eMMC boot. Then power on. It should be able to boot into u-boot: 

[    0.000096] NOTICE:  BL2: RZ G2E Initial Program Loader(CA53)
[    0.004372] NOTICE:  BL2: Initial Program Loader(Rev.2.0.7)
[    0.009905] NOTICE:  BL2: PRR is RZG G2E Ver.1.1
[    0.014478] NOTICE:  BL2: PLL1 nonSSCG Clock select
[    0.019327] NOTICE:  BL2: Board is EK874 RZ/G2E Rev.1.0
[    0.024502] NOTICE:  BL2: Boot device is eMMC(50MHz x8)
[    0.029682] NOTICE:  BL2: LCM state is CM
[    0.033647] NOTICE:  BL2: 0x400000000 - 0x47fffffff, 2 GiB
[    0.039080] NOTICE:  BL2: DDR1856(rev.0.12)
[    0.043231] NOTICE:  BL2: [COLD_BOOT]
[    0.048483] NOTICE:  BL2: DRAM Split is OFF
[    0.051179] NOTICE:  BL2: QoS is default setting(rev.0.05)
[    0.056622] NOTICE:  BL2: DRAM refresh interval 3.9 usec
[    0.068842] NOTICE:  BL2: v1.5(release):61eac60f5-dirty
[    0.072573] NOTICE:  BL2: Built : 19:44:42, Dec 16 2020
[    0.077761] NOTICE:  BL2: Normal boot
[    0.081399] NOTICE:  BL2: eMMC boot from partition 1
[    0.086539] NOTICE:  BL2: Load dst=0xe6312100 src=(p:1)0x30000(384) len=0x200(1)
[    0.093922] NOTICE:  BL2: Load dst=0x43f00000 src=(p:1)0x30400(386) len=0x1800(12)
[    0.101589] NOTICE:  BL2: Load dst=0x44000000 src=(p:1)0x40000(512) len=0x10000(128)
[    0.110783] NOTICE:  BL2: Load dst=0x50000000 src=(p:2)0x0(0) len=0x100000(2048)
[    0.139578] NOTICE:  BL2: Booting BL31


U-Boot 2018.09-g3bc3f7369f-dirty (Dec 17 2020 - 16:51:50 +0900)

CPU: Renesas Electronics R8A774C0 rev 1.1
Model: Silicon Linux EK874 RZ/G2E board
DRAM:  1.9 GiB
Bank #0: 0x048000000 - 0x0bfffffff, 1.9 GiB

Watchdog: Not found by seq!
WDT:   watchdog@00000000e6020000
Watchdog: Started!
MMC:   sd@ee100000: 0, sd@ee160000: 1
Loading Environment from MMC... OK
In:    serial@e6e88000
Out:   serial@e6e88000
Err:   serial@e6e88000
Net:   
Error: ethernet@e6800000 address not set.
eth-1: ethernet@e6800000
Hit any key to stop autoboot:  2

Build Linux Kernel

cd linux-cip
./build-g2e.sh

Create Linux root filesystem

Prepare a SD card with capacity of 16GB or more. Use partition tool like fdisk, create 2 partitions on SD card: first partition should be FAT16/32, with size at least 64MiB, secord partition should be ext4, size should be at least 8GiB. Copy files below into first partition: 

linux-cip/deploy/g2e/Image
linux-cip/deploy/g2e/r8a774c0-rzg2e-novotech.dtb
linux-cip/deploy/g2e/modules.tar.gz

Extract any Linux rootfs for AArch64 platform into second partition, and extract modules.tar.gz into the partition.

Boot kernel & rootfs from SD card

At u-boot auto booting count down, press enter to break into u-boot command-line. Use commands below to boot from SD card: 

setenv bootargs 'root=/dev/mmcblk0p2 rootwait rw'
fatload mmc 0:1 0x48080000 Image; fatload mmc 0:1 0x48000000 r8a774c0-rzg2e-novotech.dtb; booti 0x48080000 - 0x48000000

The device path of SD card is /dev/mmcblk0, and the path of eMMC is /dev/mmcblk2. Kernel and rootfs can be written into eMMC with the same partition structure as SD card.

Using GPIO

GPIO Bank Address
GPIO 0 494
GPIO 1 471
GPIO 2 445
GPIO 3 429
GPIO 4 418
GPIO 5 398
GPIO 6 380

GPIO Number = GPIO Bank Address + Pin Number. e.g, GPIO number of GPIO 2-2 is 445+2=447.

You use user level interfaces in /sys/class/gpio to operate GPIOs. Just like other ARM platforms.

You can check GPIO stats by reading /sys/kernel/debug/gpio: 

sudo cat /sys/kernel/debug/gpio

Using Audio SoC

At first running, ALSA should be configured with the commands below: 

amixer cset name="HP Playback Switch" on
amixer cset name="HPO MIDAC1 Switch" on
amixer cset name="Stereo DAC MIXL DAC L1 Switch" on
amixer cset name="Stereo DAC MIXR DAC R1 Switch" on
amixer cset name="DAC MIXL INF1 Switch" on
amixer cset name="DAC MIXR INF1 Switch" on
amixer cset name="DAC MIXL Stereo ADC Switch" off
amixer cset name="DAC MIXR Stereo ADC Switch" off
amixer cset name="ADC Capture Switch" on
amixer cset name="Stereo1 ADC MIXL ADC1 Switch" on
amixer cset name="Stereo1 ADC MIXR ADC1 Switch" on


amixer cset name="RECMIXL INL1 Switch" on
amixer cset name="RECMIXR INR1 Switch" on
amixer cset name="RECMIXL BST1 Switch" on
amixer cset name="RECMIXR BST1 Switch" on

alsactl store

If you are using non-standard Linux distributions (like customized Yocto or buildroot), you should write the mixer configurations in startup script.

Using Camera

Camera Module: Sony IMX219

Use commands below to initialize media controller:

FHD(1920x1080) mode: 

media-ctl -d /dev/media0 -r
media-ctl -d /dev/media0 -l "'rcar_csi2 feaa0000.csi2':1 -> 'VIN4 output':0 [1]"
media-ctl -d /dev/media0 -V "'rcar_csi2 feaa0000.csi2':1 [fmt:SRGGB8_1X8/1920x1080 field:none]"
media-ctl -d /dev/media0 -V "'imx219 0-0010':0 [fmt:SRGGB8_1X8/1920x1080 field:none]"

VGA(640x480) mode: 

media-ctl -d /dev/media0 -r
media-ctl -d /dev/media0 -l "'rcar_csi2 feaa0000.csi2':1 -> 'VIN4 output':0 [1]"
media-ctl -d /dev/media0 -V "'rcar_csi2 feaa0000.csi2':1 [fmt:SRGGB8_2X8/640x480 field:none]"
media-ctl -d /dev/media0 -V "'imx219 0-0010':0 [fmt:SRGGB8_1X8/640x480 field:none]"

Camera device will be /dev/video0 on Debian rootfs, and /dev/video8 on Yocto rootfs.

Camera subdev device will be /dev/v4l-subdev1 on Debian rootfs, and /dev/v4l-subdev18 on Yocto rootfs.

You can use mediactl -d /dev/media0 -p to check device status.

You can use commands below to configure camera parameters (on Debian rootfs): 

#Set exposure
v4l2-ctl -d /dev/v4l-subdev1 --set-ctrl exposure=1600

#Set analog gain
v4l2-ctl -d /dev/v4l-subdev1 --set-ctrl analogue_gain=232

#Check camera controllers
v4l2-ctl -d /dev/v4l-subdev1 --list-ctrls

Use GStreamer to get a photo (on Debian rootfs): 

gst-launch-1.0 v4l2src device=/dev/video0 num-buffers=1 ! video/x-bayer,format=rggb,width=1920,height=1080,framerate=30/1 ! bayer2rgb ! videoflip video-direction=4 ! videoflip video-direction=5 ! jpegenc ! filesink location=camsnap.jpg

Use GStreamer to show video from camera (on Yocto rootfs, need Wayland support): 

gst-launch-1.0 v4l2src device=/dev/video8 io-mode=dmabuf ! video/x-bayer,format=rggb,width=640,height=480,framerate=30/1 ! bayersink

Known problems

WiFi module does not support random MAC

By default, Network Manager will use random MAC for better security, somehow the module used on this board does not support it. You should disable it by edit file /etc/NetworkManager/NetworkManager.conf, add add lines below: 

[device]
wifi.scan-rand-mac-address=no

Set MAC address of ethernet card

There is no EEPROM or SPI Flash to save MAC address for ethernet card. So you can set MAC address by yourself. e.g. Using Network Manager: 

sudo nmtui

Edit your ethernet connection, unfold ETHERNET option, set "Cloned MAC address" to the address you want. Then exit the tool to save your settings.

Or you can set MAC address in u-boot, press Enter key when u-boot is waiting for interrupting, then set MAC address with commands below: 

setenv ethaddr "AC:F3:5F:1E:87:53"
saveenv

You can replace the address with the one you want.

No Graphic Accelerations on Debian rootfs

2D/3D Graphic Accelerations are only supported in Renesas's customized Yocto, and only Wayland is supported.

No Bayer Color Encoding Support

Some cameras (like Sony IMX219) can only output RAW bayer video data, which is not supported by hardware encoders on the board. Even through you can convert color space with GStreamer element like bayer2rgb, it will cost lots of CPU resources and RAM bandwidth.

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