From 6cda4f68619ec139be7897ea61b7f22c72c38b59 Mon Sep 17 00:00:00 2001
From: Vladimir Vid <vladimir.vid@sartura.hr>
Date: Mon, 9 Jul 2018 11:09:53 +0200
Subject: imx6: Initial support for SolidRun CuBox-i devices based on i.MX6
 processors (i1, i2, i2eX, and i4Pro).

- Specifications -

CuBox i1:
- SoC: i.MX6 Solo
- Cores: 1
- Memory Size: 512MB
- GPU: GC880
- Wifi/Bluetooth: Optional
- USB 2.0 ports: 2
- Ethernet: 10/100/1000 Mbps

CuBox i2 | i2eX:
- SoC: i.MX6 Dual Lite
- Cores: 2
- Memory Size: 1GB
- GPU: GC2000
- Wifi/Bluetooth: Optional
- USB 2.0 ports: 2
- Ethernet: 10/100/1000 Mbps

CuBox i4Pro | i4x4:
- SoC: i.MX6 Quad
- Cores: 4
- Memory Size: 2/4 GB
- GPU: GC2000
- Wifi/Bluetooth: Build In
- USB 2.0 ports: 2
- Ethernet: 10/100/1000 Mbps

Built-in u-boot requires SPL (secondary program loader) to be present on the SD-card regardless of the image type which will be loaded.
SPL is generated by the u-boot-mx6cuboxi package which is preselected by the target device and can be found in bin/u-boot-mx6cuboxi directory.

Flashing the SPL:
dd if=/dev/zero of=/dev/mmcblk0 bs=1M count=4
dd if=bin/targets/imx6/generic/u-boot-mx6cuboxi/SPL of=/dev/mmcblk0 bs=1K seek=1

Preparing the firmware on the SD-card:
(echo o; echo n; echo p; echo 1; echo ''; echo ''; echo w) | fdisk /dev/mmcblk0
mkfs.ext4 /dev/mmcblk0p1
mount /dev/mmcblk0p1 /mnt
tar -xzf bin/targets/imx6/generic/openwrt-imx6-device-cubox-i-rootfs.tar.gz -C /mnt/
mkdir -p /mnt/boot
cp bin/targets/imx6/generic/{*-uImage,*.dtb,*.scr} /mnt/boot/

Generated u-boot.img needs to be placed on the first partition:
cp bin/targets/imx6/generic/u-boot-mx6cuboxi/u-boot.img /mnt/

To boot from the SD card:

Boot script which sets mmc/dtb parameters and boots the board is automatically sourced.
If this does not work for any reason:
mmc dev 0; load mmc 0:1 $scriptaddr boot/boot.scr; source $scriptaddr

Currently imx6dl-cubox-i.dtb (Dual Lite) and imx6q-cubox-i.dtb (Quad) device trees are available.

Tested on i4Pro, MMC, USB (+ HiD), HDMI and ethernet ports are working.
Wireless and bluetooth are broken ATM. According to SolidRun forums, BCM4329/BCM4330 firmware is used which works fine on older kernels.

Signed-off-by: Vladimir Vid <vladimir.vid@sartura.hr>
---
 target/linux/imx6/image/bootscript-cubox | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)
 create mode 100644 target/linux/imx6/image/bootscript-cubox

(limited to 'target/linux/imx6/image/bootscript-cubox')

diff --git a/target/linux/imx6/image/bootscript-cubox b/target/linux/imx6/image/bootscript-cubox
new file mode 100644
index 0000000000..b639590720
--- /dev/null
+++ b/target/linux/imx6/image/bootscript-cubox
@@ -0,0 +1,26 @@
+echo "CuBox OpenWrt Boot script"
+
+# Set console variable for both UART and HDMI
+setenv console console=ttymxc0,115200 video=mxcfb0:dev=hdmi,1920x1080M@60,if=RGB24,bpp=32
+
+# Find correct dtb
+if test ${board_name} = CUBOXI && test ${board_rev} = MX6DL; then
+	setenv fdt_name imx6dl.dtb;
+elif test ${board_name} = CUBOXI && test ${board_rev} = MX6Q; then
+	setenv fdt_name imx6q-cubox-i.dtb;
+fi
+
+# Set correct devtype and partition
+if test ${devtype} != mmc; then setenv devtype mmc; fi
+if mmc dev 0; then
+	setenv mmcdev 0
+elif mmc dev 1; then
+	setenv mmcdev 1
+fi
+
+# Boot from the SD card is supported at the moment
+setenv bootargs "${console} root=/dev/mmcblk1p1 rw rootwait"
+mmc dev ${mmcdev}
+load ${devtype} ${mmcdev}:${devplist} ${kernel_addr_r} /boot/openwrt-imx6-cubox-i-uImage
+load ${devtype} ${mmcdev}:${devplist} ${fdt_addr_r} /boot/openwrt-imx6-${fdt_name}
+bootz ${kernel_addr_r} - ${fdt_addr_r}
-- 
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