[SeaBIOS] [PATCH] xhci: allocate scratch pad buffers

[Kevin O'Connor]

On Sun, Dec 22, 2013 at 09:54:02PM -0500, Kevin O'Connor wrote:
> On Fri, Dec 13, 2013 at 02:25:39PM -0500, Kevin O'Connor wrote:
> > On Fri, Dec 13, 2013 at 01:27:45PM -0500, Kevin O'Connor wrote:
> > > 01.342: xhci hcc=40050af hcs=4000440
> > > 
> > > I think this means that Context Size (CSZ) == 64 bytes and the
> > > controller isn't compatible with the seabios driver?
> > 
> > FYI, with the (incredibly ugly) patch below, I get a little further.
> 
> FYI, with the (incredibly ugly) patch from the previous mail and with
> a USB3 flash drive I seem to get slightly further.

FYI, it seems my USB3 controller really wants to see 64bit writes to
pci registers.  With the change below (on top of the other changes) I
can now boot my e350m1 from a USB3 flash drive.

I'm still seeing failures on my keyboard/mouse though:

01.146: XHCI port #2: 0x00200a03, powered, enabled, pls 0, speed 2 [Low]
01.163: xhci_control: control xfer failed (cc 6)

and on my USB2 flash drive:

01.132: XHCI port #1: 0x00200e03, powered, enabled, pls 0, speed 3 [High]
01.163: xhci_update_pipe: reconf ctl endpoint pkt size: 8 -> 64
01.168: xhci_alloc_pipe: configure endpoint: failed (cc 17)
01.169: xhci_alloc_pipe: configure endpoint: failed (cc 17)
01.169: Unable to configure USB MSC device.

-Kevin


diff --git a/src/hw/usb-xhci.c b/src/hw/usb-xhci.c
index dc98e5d..d0df6ee 100644
--- a/src/hw/usb-xhci.c
+++ b/src/hw/usb-xhci.c
@@ -379,6 +379,7 @@ static void xhci_process_events(struct usb_xhci_s *xhci)
         u32 addr = (u32)(&ir->erdp_low);
         u32 erdp = (u32)(evts->ring + nidx);
         pci_writel(addr, erdp);
+        pci_writel((u32)(&ir->erdp_high), 0);
     }
 }