The motivation for this is to emulate I2C transactions between an emulated host machine running Windows and the emulated EC. This will allow us to test a hidi2c service fully in software.
The basic idea is:
- Create a custom i2c device in QEMU that exposes a simple register interface and performs transfers over a socket that acts as bus
- This custom i2c device will likely be designed to just be symmetrical so it can be used by both host (controller) and EC (target)
- Windows communicates using existing inbox HID driver, but we will need to plug in a custom Windows driver somewhere that can speak the register interface of our custom i2c device
- Update the qemu-risv HAL to provide an interface around this that implements I2C target traits so it can be consumed by a hidi2c service.
- Then emulate a simple keyboard or something that can make use of the keyboard-service that talks over hidi2c.
The motivation for this is to emulate I2C transactions between an emulated host machine running Windows and the emulated EC. This will allow us to test a hidi2c service fully in software.
The basic idea is: