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.
-Hilbert This e-mail and its attachment may contain information that is confidential or privileged, and are solely for the use of the individual to whom this e-mail is addressed. If you are not the intended recipient or have received it accidentally, please immediately notify the sender by reply e-mail and destroy all copies of this email and its attachment. Please be advised that any unauthorized use, disclosure, distribution or copying of this email or its attachment is strictly prohibited.
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
Hi Nico,
Maybe you are right. But as I know, CRB Harcuvar is one of supported board of Coreboot and it includes xHCI controller and USB interfaces.
-Hilbert
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Hilbert Tu(杜睿哲_Pegatron) -
Nico Huber