This initial implementation sets up support for the EMMC interfaces on
the BCM2711. Only EMMC2 is tested since it is the interface of interest
(connects to uSD card). MMCSD communication is functional and the boot
partition of the SD card can be mounted and interacted with.
Insertion/removal interrupts do not fire after initial boot, and
sdstress fails with any byte size larger than 1023. 32GB card works
perfectly, while 64GB card exhibits strange behaviour when interacting
with VFAT filesystem.
Signed-off-by: Matteo Golin <matteo.golin@gmail.com>
Added autoled implementation for the Pi4B. Status LED is used as NuttX
start indicator, while power LED is used for panic/assert indication.
Signed-off-by: Matteo Golin <matteo.golin@gmail.com>
A basic implementation of mailbox API with some helpers for accessing
properties implemented. Uses busy-wait due to documentation challenges
with mailbox API.
Signed-off-by: Matteo Golin <matteo.golin@gmail.com>
Includes a Mini-UART NSH console for the 4B, tested on the 4GB RAM
model. Part of an I2C driver which can only read, boiler-plate for a SPI
driver, and a GPIO driver with limited pins. Some tools are present for
automatically fetching the boot files and creating the `config.txt` file
based on selected Kconfig options.
