Hello Hilbert,
Am 21.08.18 um 12:09 schrieb Hilbert Tu(杜睿哲_Pegatron):
From BWG(BIOS Write Guide), there are two steps needed to be done for USB to work:
Pre-Operating Software InitializationEHCI Initialization for Pre-OS Software UsageDoes anyone know where these steps are implemented in Coreboot? Thanks.
I don't but my educated guess is:
1. In FSP.
2. Your payload.
Though, there is a pitfall I guess. If the public datasheet for Den- verton is correct, there is *no* EHCI. And this might be your actual problem: If you only have an xHCI controller, it doesn't work with GRUB simply because GRUB doesn't have a driver for xHCI. AFAIK, nobody wrote one yet.
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This footer makes absolutely no sense when you address a mailing list. I wouldn't be surprised if you get less answers because of it.
Nico