On 4/4/24 8:25 AM, Janne Grunau via B4 Relay wrote:
Apple USB Keyboards from 2021 need quirks to be useable. The boot HID keyboard protocol is unfortunately not described in the first interface descriptor but the second. This needs several changes. The USB keyboard driver has to look at all (2) interface descriptors during probing. Since I didn't want to rebuild the USB driver probe code the Apple keyboards are bound to the keyboard driver via USB vendor and product IDs. To make the keyboards useable on Apple silicon devices the xhci driver needs to initializes rings for the endpoints of the first two interface descriptors. If this is causes concerns regarding regressions or memory use the USB_MAX_ACTIVE_INTERFACES define could be turned into a CONFIG option. Even after this changes the keyboards still do not probe successfully since they apparently do not behave HID standard compliant. They only generate reports on key events. This leads the final check whether the keyboard is operational to fail unless the user presses keys during the probe. Skip this check for known keyboards. Keychron seems to emulate Apple keyboards (some models even "re-use" Apple's USB vendor ID) so apply this quirk as well.
Some devices like Yubikeys emulate a keyboard. since u-boot only binds a single keyboard block this kind of devices from the USB keyboard driver.
Signed-off-by: Janne Grunau j@jannau.net
I picked the series, but CI indicates build errors, can you have a look ?
https://source.denx.de/u-boot/custodians/u-boot-usb/-/pipelines/20215
Thanks !