On 02/07/2021 19:22, Ethin Probst wrote:
Update: I just realized I'd made a typo -- the unknown request is
actually a get_min request.
On 7/2/21, Ethin Probst wrote:
Setup Data
bmRequestType: 0xa1
1... = Direction: Device-to-host
.01. = Type: Class (0x1)
Update: I just realized I'd made a typo -- the unknown request is
actually a get_min request.
On 7/2/21, Ethin Probst wrote:
> Thank you for all that information, both of you. I didn't realize that
> VirtIO sound would be so complicated. The specification seemed simple
> enough -- but, alas, all
Thank you for all that information, both of you. I didn't realize that
VirtIO sound would be so complicated. The specification seemed simple
enough -- but, alas, all things seem simple until you actually go and
try to implement them.
I did manage to retrieve a packet dump, from both myself and fro
On 02/07/2021 10:41, Michael Brown wrote:
UsbIo->UsbControlTransfer(UsbIo, &Req, EfiUsbDataIn,
PcdGet32 (PcdUsbTransferTimeoutValue),
&Header, sizeof(Header), &Status);
(Error handling etc omitted for brevity)
That would get you the first 8
On 01/07/2021 19:10, Ethin Probst wrote:
The first: I don't know how to retrieve the descriptors on the UEFI
API. I've looked at the Chaos Key DXE, if memory serves, or the
display port one -- one of the two. One of them contained a
ReadDescriptor() function, and so I've borrowed that, but that d
On 07/01/21 20:10, Ethin Probst wrote:
> The first: I don't know how to retrieve the descriptors on the UEFI
> API. I've looked at the Chaos Key DXE, if memory serves, or the
> display port one -- one of the two. One of them contained a
> ReadDescriptor() function, and so I've borrowed that, but th
On 07/01/21 01:01, Ethin Probst wrote:
> Hi all,
> So Leif and I have been working on USB Audio but we've run into a snag. We've
> encountered a problem -- neither of us knows enough about USB to figure out
> how to get the class-specific AC interface descriptors, and those contain
> vital infor
The first: I don't know how to retrieve the descriptors on the UEFI
API. I've looked at the Chaos Key DXE, if memory serves, or the
display port one -- one of the two. One of them contained a
ReadDescriptor() function, and so I've borrowed that, but that doesn't
really help much.
On 7/1/21, Michae
On 01/07/2021 00:01, Ethin Probst wrote:
So Leif and I have been working on USB Audio but we've run into a snag.
We've encountered a problem -- neither of us knows enough about USB to
figure out how to get the class-specific AC interface descriptors, and
those contain vital information that I n
Hi all,
So Leif and I have been working on USB Audio but we've run into a snag. We've
encountered a problem -- neither of us knows enough about USB to figure out how
to get the class-specific AC interface descriptors, and those contain vital
information that I need to be able to control the audi
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