Some USB devices cause the USB stack to get stuck with a stall error.
This adds a patch which recovers from this situation.
This avoids an U-Boot crash when Arduino Mega R3 devices are connected,
which cause an USB stall when trying to read the product string.
When a USB keyboard is connected to Raspberry Pi 32-bit versions of
U-Boot crashed in certain situations just before booting Linux. This
seems to be cause by a buffer overflow when removing the USB keyboard
before hand-over to Linux.
Since 0001-CMD-read-string-from-fileinto-env.patch is in the global
directory to be applied for U-Boot, drop it from the Raspberry Pi
specific patch directory.
* Re-add patches missed with U-Boot 2021.04-rc4 upgrade
Also add patches for Raspberry Pi again.
* Regenerate patches for U-Boot 2021.04
* Update to U-Boot 2021.04
Bump to the latest U-Boot release 2021.04-rc4. This alows to drop quite
some patches which have been sent to the mailing list or picked from the
mailing list and have been merged upstream now.
Move to the new Linux 5.10 based kernel for all Raspberry Pi boards.
This uses the version of the last OS version used in Raspberry Pi OS
raspberrypi-kernel_1.20210201-1.
* Bump Raspberry Pi kernel to 5.4
Bump kernel to the downstream Raspberry Pi 5.4 kernel. Drop patches
already merged upstream and use rebased patches for USB reset
controller (required for U-Boot 2020.10 for USB SSD boot).
* Add compatible node for upstream U-Boot
Add brcm,bcm2835-pl011 to make upstream U-Boot bind with the
bcm283x_pl011 driver. This allows to boot with the device tree provided
by the Raspberry Pi Linux kernel 5.4 even without enable_uart=1.
The patch causes U-Boot freezes in some configurations. The root cause
is that U-Boot does not allow to use the bss section in pre-relocation
code (which is where the UART is used). Drop the patch as it is not
required currently.
See also:
http://u-boot.10912.n7.nabble.com/RPi4-U-Boot-freeze-td424432.html#a427198
* Backport USB PCIe/XHCI patches to U-Boot 2020.07
Backport relevant patches required to make PCIe/USB XHCI work.
* Backport/integrate PCIe device tree changes from upstream Linux
U-Boot uses the device tree provided by upstream Linux. Make sure the
device tree has the relevant chanages to make VL805 USB controller
reset work.
* Document RPi 4 USB mass storage support (#746)
