On 1/8/21 7:14 AM, Jeremy Linton wrote:
> The rpi4 has a secondary SD controller at offset
> 0xfe340000. This controller appears to be a mostly
> compliant SDHCI controller (a newer more bugfree
> Arasan?). So the existing Arasan driver should be
> bound to it. This allows the rpi4 to boot
> with its normal eMMC2->SD card, Arasan->wifi
> configuration that is described in the Linux DT.
>
> To achieve this, it appears we should be tweaking
> some of the expansion gpios, and probably telling
> the firmware to power everything up. To do that
> the vpu mailbox headers are synced with a more recent
> list of the mailbox commands, then the rpi
> firmware dxe is extended to support some futher
> gpio/power commands. Once that is complete we tweak
> the arasan driver to use an alternate register base,
> add a workaround for a known clock crossing bug, and
> set the card voltage.
>
> Of note, this set does _NOT_ change the HID/CID's
> and add the additional eMMC2 controller to the
> DSDT table.
>
> v4->v5: variable rename
> v3->v4: Commit message tweaks, variable rename.
> v1->v3: Use some mailbox defines rather than opencoded constants
>
> Jeremy Linton (7):
> Platform/RaspberryPi: Update VPU mailbox constants
> Platform/RaspberryPi: Add further mailbox helpers
> Platform/RaspberryPi: Split MMC register definitions
> Platform/RaspberryPi/Arasan: Add write delay and voltage/clock config
> Platform/RaspberryPi/Arasan: Select the correct base frequency
> Platform/RaspberryPi: Power up SD, and tweak GPIOs
> Platform/RaspberryPi: Correct device path removal.
>
Pushed as f8958b86e886..dcb1fbff08bb
Thanks all,
> .../Drivers/ArasanMmcHostDxe/ArasanMmcHostDxe.c | 131 ++++++++---
> .../Drivers/ArasanMmcHostDxe/ArasanMmcHostDxe.h | 1 +
> Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxe.c | 7 +
> .../Drivers/RpiFirmwareDxe/RpiFirmwareDxe.c | 240 ++++++++++++++++++++-
> .../RaspberryPi/Include/IndustryStandard/RpiMbox.h | 94 +++++++-
> .../RaspberryPi/Include/Protocol/RpiFirmware.h | 25 +++
> .../Library/PlatformBootManagerLib/PlatformBm.c | 2 +-
> .../Bcm283x/Include/IndustryStandard/Bcm2836Sdio.h | 42 ++--
> 8 files changed, 484 insertions(+), 58 deletions(-)
>
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