rk3566-mcu

This repository is a collection of information and example code for the RISC-V MCU found inside the Rockchip RK3566 SoC used in the Pine64 Quartz64, PineTab2, and PineNote. Documentation is in rk3566_mcu_notes.md.

What's documented:

• Development environment in C
• Info about the core
• How to boot the MCU
• Some system-level MCU configuration registers
• the MCU timer base address (undocumented in the RK356x TRM) and usage
• INTMUX interrupt mapping (needs more testing but should be accurate) and register location
• MCU execution during suspend: due to system architecture and ARM TF-A, this is currently impossible. TF-A requests bus idles on suspend for the MCU and the memory it likes to run from, making it impossible to run during system suspend.

What's left:

• Using the rockchip-mailbox Linux driver---diederik put in a pull request to Debian to enable the CONFIG_ROCKCHIP_MBOX kernel flag, and it has been merged...it will appear in Plebian eventually.

If there's interest in a kernel module for the MCU, open an issue on this repository or contact me some other way and I may be able to write one.

Using the MCU

See examples for code examples. Each folder is a basic kernel module and RISC-V source for the MCU. Make sure you install the linux-headers package for your OS and architecture.

Contributing

If you know anything about the MCU or have done experimentation, open an issue or pull request to add information. I am also interested in the TRM for the RV1126 chip, because this chip has the same MCU core integrated but uses different registers and might have different internal connections.