Tianocore/edk2-platforms.git/Platform/RaspberryPi/Drivers/SdHostDxe, branch CodeCleanup

Platform/RaspberryPi/Drivers: Add SD/(e)MMC card detection

2020-07-14T14:41:45+00:00

The Raspberry Pi 3 and Pi 4 platforms (with latest EEPROM) can boot straight from USB, without the need for an SD card being present. However, the IsCardPresent () calls from the ArasanMmcHost and SdHost drivers are currently hardwired to return TRUE, which results in straight to USB boot failing due to the SD drivers looping on errors while trying to poke at a non-existent card... Ideally, we would use the Card Detect signal from the uSD slot, to report on the presence or absence of a card, but the Raspberry Pi Foundation did not wire those signals in the Pi 2 and subsequent models, leaving us with only potentially interfering SD commands as means to perform card detection. As a result of this, we are left with no other choice but limit detection to occurring only once, prior to formal SD card init, and then return the detected value for subsequent calls. This, however, is more than good enough for the intended purpose, which is to allow straight to USB boot. The sequence is a simplified variant of the identification code in MmcDxe. Tested on Raspberry Pi 2B, 3B and CM3 (for both SD controllers) and Pi 4 (for Arasan, as that's the only controller available today) Addresses pftf/RPi3#13, pftf/RPi3#14, pftf/RPi4#37. Co-authored-by: Andrei Warkentin Signed-off-by: Pete Batard Reviewed-by: Andrei Warkentin Tested-by: Andrei Warkentin Reviewed-by: Leif Lindholm

Platform/RPi: Replace Bcm283x SoC base register address with a PCD

2019-11-19T18:13:57+00:00

Define BCM2836_SOC_REGISTERS from PcdBcm283xRegistersAddress. This is needed in preparation for adding Raspberry Pi 4 support, since the two Pi's have a different base addresses for the Bcm283x specific registers. Signed-off-by: Pete Batard Reviewed-by: Philippe Mathieu-Daude Reviewed-by: Leif Lindholm

Platforms/RPi3: Restructure platform in preparation for Pi 4

2019-10-21T14:32:32+00:00

In preparation for adding Raspberry Pi 4 support, the Pi 3 platform is restructured by factorizing all the drivers and libraries that are going to be commonly used by the two platforms. Because much of the Pi 4 SoC is an extension of the Pi 3 one this means that almost everything, except the ACPI tables, is moved up into a new common RaspberryPi/ subdirectory that will serve both platforms. The .dec is also moved to this directory, under a new RaspberryPi.dec name, and existing references to it are updated. This commit requires the edk2-non-osi in use to contain commit 243e55f622ea in order to build. Signed-off-by: Pete Batard Reviewed-by: Philippe Mathieu-Daude Reviewed-by: Leif Lindholm