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pieeprom-2020-11-24: Enable booting from BCM2711 XHCI controller - BETA

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Tim Gover
2020-11-24 15:29:43 +00:00
parent 1443b30f52
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firmware/release-notes.md
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USB MSD boot also requires the firmware from Raspberry Pi OS 2020-08-20 or newer.
https://www.raspberrypi.org/documentation/hardware/raspberrypi/bcm2711_bootloader_config.md
## 2020-11-24 BCM2711 xHC boot support - BETA
* Add support for booting from the BCM2711 XHCI controller which is the
USB-C socket on Pi 4B / Pi 400 and the type A sockets on Compute Module 4
IO board. The controller only supports USB 2.0 and the primary usage is
for USB-MSD support on CM 4 boards without requiring a PCIe XHCI controller.
To use this add '5' to the BOOT_ORDER in the EEPROM config for BCM_USB_MSD boot.
This requires the latest rpi-update firmware.
If start.elf is loaded via the BCM2711 XHCI (BOOT_ORDER 5) then the config.txt
otg_mode setting will be set to 1 so that the OS can continue booting
using the BCM2711 XHCI. This means that the device/gadget mode is not available
when booted in this mode and there is no support for switching back to
the DWC2 controller from the BCM2711 XHCI controller.
* Update halt behavior on Pi 400 to re-enable 'power on' button if the OS
did a reset rather than using the standard mailbox shutdown commands. This
overrides WAKE_ON_GPIO / POWER_OFF_ON_HALT settings on Pi 400 because
it has a dedicated power button.
If a button on GPIO3 really is requried then it can be re-enabled by setting
WAKE_ON_GPIO=2 but that will consume more power.
* Fix short blink before one-shot error pattern - #251
* Validate SDRAM in recovery mode.
* XHCI protocol layer fixes for non-VLI controllers.
* Updated 'tryboot' for new version which also supports Pi3 and earlier.
## 2020-10-28 Defer HDMI diagnostics display, update-timestamps, tryboot support - BETA
* Skip rendering of the diagnostics screen for HDMI_DELAY seconds (default 5).
This means that for SD-card and USB MSD flash boot devices the diagnostics