[SeaBIOS] [PATCH 1/2] xhci: Improve port status change debugging
Kevin O'Connor
kevin at koconnor.net
Sun Dec 20 21:56:10 CET 2015
Report the port state on a port status change notification. Clear the
change bits so further change notifications are delivered.
Signed-off-by: Kevin O'Connor <kevin at koconnor.net>
---
src/hw/usb-xhci.c | 12 +++++++++---
1 file changed, 9 insertions(+), 3 deletions(-)
diff --git a/src/hw/usb-xhci.c b/src/hw/usb-xhci.c
index 654feba..5f44239 100644
--- a/src/hw/usb-xhci.c
+++ b/src/hw/usb-xhci.c
@@ -658,9 +658,15 @@ static void xhci_process_events(struct usb_xhci_s *xhci)
}
case ER_PORT_STATUS_CHANGE:
{
- u32 portid = (etrb->ptr_low >> 24) & 0xff;
- dprintf(3, "%s: status change port #%d\n",
- __func__, portid);
+ u32 port = ((etrb->ptr_low >> 24) & 0xff) - 1;
+ // Read status, and clear port status change bits
+ u32 portsc = readl(&xhci->pr[port].portsc);
+ u32 pclear = (((portsc & ~(XHCI_PORTSC_PED|XHCI_PORTSC_PR))
+ & ~(XHCI_PORTSC_PLS_MASK<<XHCI_PORTSC_PLS_SHIFT))
+ | (1<<XHCI_PORTSC_PLS_SHIFT));
+ writel(&xhci->pr[port].portsc, pclear);
+
+ xhci_print_port_state(3, __func__, port, portsc);
break;
}
default:
--
2.5.0
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