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.. SPDX-License-Identifier: GPL-2.0+
Sipeed's Lichee PI 4A based on T-HEAD TH1520 SoC
================================================
The LicheePi4A is a high-performance RISC-V SBC based on TH1520(4xC910@1.85GHz),
comes with 4/8/16 GB RAM, and up to 128GB eMMC, and rich peripherals.
- SoC T-HEAD TH1520 SoC
- System Memory 4GB, 8GB, or 16GB LPDDR4X
- Storage eMMC flash with 8/32/128 GB
- external microSD slot
- Networking 2x Gigabit Ethernet
- WiFi+BT
- Display HDMI2.0, 4-lane MIPI DSI
- Camera 4-lane MIPI CSI + 2x2-lane MIPI CSI
- Audio Onboard Speaker, 2xMEMS MIC, 3.5mm headphone jack
- USB 4xUSB3.0 Type-A, 1xUSB2.0 Type-C
- GPIO 2x10Pin breakout, UART/IIC/SPI
- Power DC 12V/2A, POE 5V/2.4A, USB Type-C 5V/2A
TH1520 RISC-V SoC
-----------------
The TH1520 SoC consist of quad-core RISC-V Xuantie C910 (RV64GCV) processor,
Xuantie C906 audio DSP, low power Xuantie E902 core, it also integrate
Imagination GPU for graphics, and 4 TOPS NPU for AI acceleration.
Mainline support
----------------
The support for following drivers are already enabled:
1. ns16550 UART Driver.
2. eMMC and SD card
Building
~~~~~~~~
1. Add the RISC-V toolchain to your PATH.
2. Setup ARCH & cross compilation environment variable:
.. code-block:: none
export CROSS_COMPILE=<riscv64 toolchain prefix>
3. Build DDR firmware
DDR driver requires a firmware to function, to build it:
.. code-block:: bash
git clone --depth 1 https://github.com/ziyao233/th1520-firmware
cd th1520-firmware
lua5.4 ddr-generate.lua src/<CONFIGURATION_NAME>.lua th1520-ddr-firmware.bin
4. Build OpenSBI Firmware
TH1520 port of proper U-Boot runs in S mode, thus OpenSBI is required as
SBI firmware to setup S-mode environment and provide SBI calls. It could
be cloned and built for TH1520 as below,
.. code-block:: bash
git clone https://github.com/riscv-software-src/opensbi.git
cd opensbi
make PLATFORM=generic
TH1520 support in OpenSBI requires v1.2 or a more recent version.
More detailed description of steps required to build fw_dynamic firmware
is beyond the scope of this document. Please refer to OpenSBI
documenation.
5. Build U-Boot images
The DDR firmware should be copied to U-Boot source directory before
building.
.. code-block:: bash
cd <U-Boot-dir>
cp <path-to-ddr-firmware> th1520-ddr-firmware.bin
make th1520_lpi4a_defconfig
make OPENSBI=<opensbi_dir>/build/platform/generic/firmware/fw_dynamic.bin
This will generate u-boot-with-spl.bin, which contains SPL, DDR firmware,
OpenSBI firmware and proper U-Boot.
Booting
~~~~~~~
u-boot-with-spl.bin should be loaded to SRAM through fastboot. Connect
the board to computer with Type-C cable and run
.. code-block:: bash
fastboot flash ram u-boot-with-spl.bin
fastboot reboot
Sample boot log from Lichee PI 4A board via fastboot
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
.. code-block:: none
[APP][E] protocol_connect failed, exit.
Starting download of 940681 bytes
downloading of 940681 bytes finished
U-Boot SPL 2025.07-rc3-00005-g3a0ef515b8bb (May 29 2025 - 10:42:46 +0000)
Trying to boot from RAM
U-Boot 2025.07-rc3-00005-g3a0ef515b8bb (May 29 2025 - 10:42:46 +0000)
CPU: thead,c910
Model: Sipeed Lichee Pi 4A
DRAM: 8 GiB
Core: 110 devices, 9 uclasses, devicetree: separate
MMC: mmc@ffe7080000: 0, mmc@ffe7090000: 1
Loading Environment from <NULL>... OK
In: serial@ffe7014000
Out: serial@ffe7014000
Err: serial@ffe7014000
Model: Sipeed Lichee Pi 4A
LPI4A=>
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