| Christian Hewitt | 9cb6581 | 2021-09-15 01:46:59 +0000 | [diff] [blame] | 1 | .. SPDX-License-Identifier: GPL-2.0+ |
| 2 | |
| 3 | U-Boot for Radxa Zero |
| 4 | ===================== |
| 5 | |
| 6 | Radxa Zero is a small form factor SBC based on the Amlogic S905Y2 |
| 7 | chipset that ships in a number of RAM/eMMC configurations: |
| 8 | |
| 9 | Boards with 512MB/1GB LPDDR4 RAM have no eMMC storage and BCM43436 |
| 10 | wireless (2.4GHz b/g/n) while 2GB/4GB boards have 8/16/32/64/128GB |
| 11 | eMMC storage and BCM4345 wireless (2.4/5GHz a/b/g/n/ac). |
| 12 | |
| 13 | - Amlogic S905Y2 quad-core Cortex-A53 |
| 14 | - Mali G31-MP2 GPU |
| 15 | - HDMI 2.1 output (micro) |
| 16 | - 1x USB 2.0 port - Type C (OTG) |
| 17 | - 1x USB 3.0 port - Type C (Host) |
| 18 | - 1x micro SD Card slot |
| 19 | - 40 Pin GPIO header |
| 20 | |
| 21 | Schematics are available on the manufacturer website: |
| 22 | |
| 23 | https://dl.radxa.com/zero/docs/hw/RADAX_ZERO_V13_SCH_20210309.pdf |
| 24 | |
| 25 | U-Boot compilation |
| 26 | ------------------ |
| 27 | |
| 28 | .. code-block:: bash |
| 29 | |
| 30 | $ export CROSS_COMPILE=aarch64-none-elf- |
| 31 | $ make radxa-zero_defconfig |
| 32 | $ make |
| 33 | |
| 34 | Image creation |
| 35 | -------------- |
| 36 | |
| 37 | Amlogic does not provide sources for the firmware and for tools needed |
| 38 | to create the bootloader image, so it is necessary to obtain them from |
| 39 | git trees published by the board vendor: |
| 40 | |
| 41 | .. code-block:: bash |
| 42 | |
| 43 | $ git clone -b radxa-zero-v2021.07 https://github.com/radxa/u-boot.git |
| 44 | $ git clone https://github.com/radxa/fip.git |
| 45 | |
| 46 | $ sudo apt-get install -y gcc-aarch64-linux-gnu device-tree-compiler libncurses5 libncurses5-dev |
| 47 | $ sudo apt-get install -y bc python dosfstools flex build-essential libssl-dev mtools |
| 48 | |
| 49 | $ wget https://developer.arm.com/-/media/Files/downloads/gnu-a/10.3-2021.07/binrel/gcc-arm-10.3-2021.07-x86_64-aarch64-none-elf.tar.xz |
| 50 | $ sudo tar xvf gcc-arm-10.3-2021.07-x86_64-aarch64-none-elf.tar.xz -C /opt |
| 51 | |
| 52 | $ export CROSS_COMPILE=/opt/gcc-arm-10.2-2020.11-x86_64-aarch64-none-elf/bin/aarch64-none-elf- |
| 53 | $ export ARCH=arm |
| 54 | $ cd u-boot |
| 55 | $ make radxa-zero_defconfig |
| 56 | $ make |
| 57 | |
| 58 | $ cp u-boot.bin ../fip/radxa-zero/bl33.bin |
| 59 | $ cd ../fip/radxa-zero |
| 60 | $ make |
| 61 | |
| 62 | This will generate: |
| 63 | |
| 64 | .. code-block:: bash |
| 65 | |
| 66 | $ u-boot.bin u-boot.bin.sd.bin u-boot.bin.usb.bl2 u-boot.bin.usb.tpl |
| 67 | |
| 68 | Then write the image to SD with: |
| 69 | |
| 70 | .. code-block:: bash |
| 71 | |
| 72 | $ DEV=/dev/your_sd_device |
| 73 | $ dd if=fip/u-boot.bin.sd.bin of=$DEV conv=fsync,notrunc bs=512 skip=1 seek=1 |
| 74 | $ dd if=fip/u-boot.bin.sd.bin of=$DEV conv=fsync,notrunc bs=1 count=444 |