1: Create microSD

Jumpers 1100 (microSD)

#microSD in x86: (lsblk shows drive is /dev/sdf)

wget https://rcn-ee.net/rootfs/2018-12-10/elinux/debian-9.6-console-armhf-2018-12-10.tar.xz
tar xf debian-9.6-console-armhf-2018-12-10.tar.xz
cd debian-9.6-console-armhf-2018-12-10/
sudo ./setup_sdcard.sh --mmc /dev/sdf --dtb hwpack/imx8mq-evk.conf

git clone https://github.com/RobertCNelson/imx8-linux-dev
cd ./imx8-linux-dev/
git checkout origin/v4.14.x -b tmp
./build_kernel.sh
#Open system.sh, add MMC=/dev/sdf
./tools/install_kernel.sh

#microSD in imx8

# usb console plugged in, first port is serial..
#[ 6138.065478] usbcore: registered new interface driver cp210x
#[ 6138.065495] usbserial: USB Serial support registered for cp210x
#[ 6138.065541] cp210x 2-10.1.1:1.0: cp210x converter detected
#[ 6138.067665] usb 2-10.1.1: cp210x converter now attached to ttyUSB1
#[ 6138.067708] cp210x 2-10.1.1:1.1: cp210x converter detected
#[ 6138.069469] usb 2-10.1.1: cp210x converter now attached to ttyUSB2

tio /dev/ttyUSB1

user: debian
pass: temppwd

2: Write Base Image to eMMC while booted on microSD

sudo apt update
sudo apt install kpartx parted

#unlock/clear eMMC boot partitions..

sudo sh -c "echo 0 > /sys/block/mmcblk0boot0/force_ro"
sudo sh -c "echo 0 > /sys/block/mmcblk0boot1/force_ro"

sudo dd if=/dev/zero of=/dev/mmcblk0boot0 bs=1M count=4
sudo dd if=/dev/zero of=/dev/mmcblk0boot1 bs=1k count=4

wget https://rcn-ee.net/rootfs/2018-12-10/elinux/debian-9.6-console-armhf-2018-12-10.tar.xz
tar xf debian-9.6-console-armhf-2018-12-10.tar.xz
cd debian-9.6-console-armhf-2018-12-10/
sudo ./setup_sdcard.sh --mmc /dev/mmcblk0 --dtb hwpack/imx8mq-evk.conf

#Actually write the new bootloader for the eMMC..

sudo dd if=/opt/backup/uboot/u-boot.imx8 of=/dev/mmcblk0boot0 bs=1k seek=33
sudo dd if=/opt/backup/uboot/u-boot.imx8 of=/dev/mmcblk0boot1 bs=1k seek=33

#Create a few directories for the eMMC:

sudo mkdir /mnt/emmc/
sudo mkdir /mnt/emmc_boot/

#Open /etc/fstab and make this change: (sudo nano /etc/fstab)

#***************************************************************
# /etc/fstab: static file system information.
#
# Auto generated by RootStock-NG: setup_sdcard.sh
#
#/dev/mmcblk0p2  /  ext4  noatime,errors=remount-ro  0  1
debugfs  /sys/kernel/debug  debugfs  defaults  0  0

/dev/mmcblk1p2  /  ext4  noatime,errors=remount-ro  0  1
/dev/mmcblk1p1  /boot/  auto  noatime  0  1

/dev/mmcblk0p1  /mnt/emmc_boot/  auto  noatime  0  2
/dev/mmcblk0p2  /mnt/emmc/  ext4  noatime,errors=remount-ro  0  2
#***************************************************************

Then type "sudo mount -a" and verify they mounted.. "lsblk | grep mmc"...

debian@arm:~$ lsblk | grep mmc
mmcblk1      179:0    0 14.9G  0 disk 
├─mmcblk1p1  179:1    0   64M  0 part /boot
└─mmcblk1p2  179:2    0 14.8G  0 part /
mmcblk0      179:32   0 13.8G  0 disk 
├─mmcblk0p1  179:33   0   64M  0 part /mnt/emmc_boot
└─mmcblk0p2  179:34   0 13.7G  0 part /mnt/emmc
mmcblk0boot0 179:64   0    4M  0 disk 
mmcblk0boot1 179:96   0    4M  0 disk 
mmcblk0rpmb  179:128  0  128K  0 disk 

3: eMMC Kernel Update script..

sudo rsync -av /boot/ /mnt/emmc_boot/ --delete ;\
sudo rsync -av /lib/modules/ /mnt/emmc/lib/modules/ --delete  ;\
sudo rm /mnt/emmc_boot/fsl-imx8mq-evk.dtb ;\
sudo cp -v /mnt/emmc_boot/fsl-imx8mq-evk-emmc.dtb /mnt/emmc_boot/fsl-imx8mq-evk.dtb  ;\
sudo systemctl poweroff

4: Boot eMMC

Remove microsd, Swap jumper to 0010, insert 340 module, power up...


See brcm error..

debian@arm:~$ dmesg | grep brcm
[    5.731152] brcmfmac: F1 signature read @0x18000000=0xffffffff
[    5.732868] brcmfmac: brcmf_chip_recognition: chip backplane type 15 is not supported
[    5.751421] brcmfmac: brcmf_sdio_probe_attach: brcmf_chip_attach failed!
[    5.761064] brcmfmac: brcmf_sdio_probe: brcmf_sdio_probe_attach failed
[    5.774510] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe failed -19...

looks like a sdio bus failure....