Sdhost / rpisdhc boot support #33
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Building, using, etc. Signed-off-by: Andrei Warkentin <andrey.warkentin@gmail.com>
This is much faster than the Arasan controller, which in turn is freed up for use with SDIO. For some reason, this won't work with the edk2 in-tree MmcDxe, so import Microsoft's version from the IoT UEFI. The UEFI driver for Arasan needs to be disabled, otherwise it will hang up for a long time on startup, trying to enumerate the SDIO WiFi chip as a storage device.
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Thanks for your contribution. Very cool.
It will take a bit of time to merge this. Namely, because:
- Need to be able to choose default controller at compile and setup time.
- Need to figure out why MmcDxe doesn't work and fix it appropriately without regressing Arasan support. E.g. taking in MS's MmcDxe is not a solution... their approach to handling high speed switching is even worse than what the old edk2 MmcDxe is/was doing).
I'll put more comments here as I make forward progress on the merge.
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Hey guys, could you please, join to our Window ARM64 on Raspberry Pi group? You can join to share our experiences / updates regarding this project : it's here https://t.me/joinchat/ACWtmw7G42XInm3lAronmw We're already 11 members and growing! |
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I wouldn't be too worried about Arasan support, since the Arasan is necessary for WiFi and (on the 3B+ at least) Bluetooth (sdhost doesn't support SDIO). So, setting the Arasan to handle the SD card disables WiFi. |
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@SuperJMN please don't spam and split the efforts like that, ugh. @Googulator Bluetooth should be over UART actually. Also note that MS uses Arasan on RPi2 for SD storage. (and that the Pi2 is 64-bit these days). Anyway, once USB drivers are ready, it'll matter less. |
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Bluetooth...Maybe we need to disable UART and get sth. from ms-iot bsp? |
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Bluetooth is connected to PL011, not the miniUART. UEFI only uses the miniUART.
A
… 12 июня 2018 г., в 18:23, thchi12 ***@***.***> написал(а):
Bluetooth...Maybe we need to disable UART and get sth. from ms-iot bsp?
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I found this a little bit unstable? |
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Put the card in a PC, and run chkdsk on it. Sometimes the filesystem is left in an inconsistent state on shutdown, due to lack of clean ACPI shutdown support. |
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SdHost is the "other" proprietary BCM
SD controller, vaguely similar to SDHCI but
(of course, of course) completely incompatible.
The Arasan SDHCI controller is SDIO capable,
so if the OS wishes to use the WiFi SDIO
adapter, the SD card needs to be routed
to SdHost.
You can switch the SD card between Arasan
and SdHost in the UEFI setup screen
("Device Manager"->"Raspberry Pi Configuration"->
"Chipset"). At compile time this is the
SdIsArasan Pcd.
The SdHost driver today is in mildly better shape
over the Arasan one, supporting 4-bit and HS (50Mhz)
modes. Both, of course, can't support any of the 1.8v
modes.
The Arasan driver is still the default pending
OS boot integration testing.
This merges #33
Signed-off-by: Andrei Warkentin <andrey.warkentin@gmail.com>
Expose both SD controllers to HLOS. UEFI can use either to route uSD slot to. This merges #33 Signed-off-by: Andrei Warkentin <andrey.warkentin@gmail.com>
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Merged. |
SdHost is the "other" proprietary BCM
SD controller, vaguely similar to SDHCI but
(of course, of course) completely incompatible.
The Arasan SDHCI controller is SDIO capable,
so if the OS wishes to use the WiFi SDIO
adapter, the SD card needs to be routed
to SdHost.
You can switch the SD card between Arasan
and SdHost in the UEFI setup screen
("Device Manager"->"Raspberry Pi Configuration"->
"Chipset"). At compile time this is the
SdIsArasan Pcd.
The SdHost driver today is in mildly better shape
over the Arasan one, supporting 4-bit and HS (50Mhz)
modes. Both, of course, can't support any of the 1.8v
modes.
The Arasan driver is still the default pending
OS boot integration testing.
This merges #33
Signed-off-by: Andrei Warkentin <andrey.warkentin@gmail.com>
Expose both SD controllers to HLOS. UEFI can use either to route uSD slot to. This merges #33 Signed-off-by: Andrei Warkentin <andrey.warkentin@gmail.com>
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