Isaac Christensen (isaac.christensen@se-eng.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/6608
-gerrit
commit 67f6c2b4b74afd03522fac027bdfeacd5ec0f81d Author: Julius Werner jwerner@chromium.org Date: Thu Aug 22 16:24:09 2013 -0700
libpayload: ehci: Set explicit terminate bits in dummy_qh next pointers.
The EHCI host controllers in Samsung Exynos SoC seem to be a little more picky than Intel ones. When they reach the dummy_qh in the periodic frame list, they try to access the next qTD pointer even though it's NULL, an run into a HostSystemError. This patch explicitly sets the Terminate bit on those pointers to mark them invalid.
Change-Id: I50fa79bbf1c5fab306d7885c01efd66b13e279b8 Signed-off-by: Julius Werner jwerner@chromium.org Reviewed-on: https://gerrit.chromium.org/gerrit/66884 Reviewed-by: Vincent Palatin vpalatin@chromium.org (cherry picked from commit c575a5c958ce88732d28044352c89418bcd5ea86) Signed-off-by: Isaac Christensen isaac.christensen@se-eng.com --- payloads/libpayload/drivers/usb/ehci.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/payloads/libpayload/drivers/usb/ehci.c b/payloads/libpayload/drivers/usb/ehci.c index 0764592..af7daf1 100644 --- a/payloads/libpayload/drivers/usb/ehci.c +++ b/payloads/libpayload/drivers/usb/ehci.c @@ -793,6 +793,8 @@ ehci_init (unsigned long physical_bar) memset((void *)EHCI_INST(controller)->dummy_qh, 0, sizeof(*EHCI_INST(controller)->dummy_qh)); EHCI_INST(controller)->dummy_qh->horiz_link_ptr = QH_TERMINATE; + EHCI_INST(controller)->dummy_qh->td.next_qtd = QH_TERMINATE; + EHCI_INST(controller)->dummy_qh->td.alt_next_qtd = QH_TERMINATE; for (i = 0; i < 1024; ++i) periodic_list[i] = virt_to_phys(EHCI_INST(controller)->dummy_qh) | PS_TYPE_QH;