On Thu, May 30, 2024 at 2:14 PM Alex Bennée <alex.ben...@linaro.org> wrote:
> David Hubbard <dmamf...@gmail.com> writes: > > > From: Cord Amfmgm <dmamf...@gmail.com> > > > > This changes the way the ohci emulation handles a Transfer Descriptor > with > > "Current Buffer Pointer" set to "Buffer End" + 1. > > > > The OHCI spec 4.3.1.2 Table 4-2 allows td.cbp to be one byte more than > td.be > > to signal the buffer has zero length. Currently qemu only accepts > zero-length > > Transfer Descriptors if the td.cbp is equal to 0, while actual OHCI > hardware > > accepts both cases. > > Which version of the OHCI spec is this? I can't find it in the one copy > Google throws up: > > > http://download.microsoft.com/download/1/6/1/161ba512-40e2-4cc9-843a-923143f3456c/ohci_11.pdf > > Replace http with https in that URL and it downloads the PDF OK - it is for IEEE-1394 Firewire though. Try this link: https://www.cs.usfca.edu/~cruse/cs698s10/hcir1_0a.pdf - I am on page 35/160 (the page is numbered "21" on the bottom) for the Table 4-2.
