Commit dad5b9ea authored by Gerd Hoffmann's avatar Gerd Hoffmann
Browse files

xhci: implement warm port reset 

Without this patch windows can't do port resets for usb3 devices.

https://bugzilla.redhat.com/show_bug.cgi?id=949514



Signed-off-by: default avatarGerd Hoffmann <kraxel@redhat.com>
parent 6fdf98f2

hw/usb/hcd-xhci.c

+11 −2
Original line number Diff line number Diff line
@@ -2672,7 +2672,7 @@ static void xhci_port_update(XHCIPort *port, int is_detach) 
    xhci_port_notify(port, PORTSC_CSC);

}



static void xhci_port_reset(XHCIPort *port)

static void xhci_port_reset(XHCIPort *port, bool warm_reset)

{

    trace_usb_xhci_port_reset(port->portnr);
@@ -2683,6 +2683,11 @@ static void xhci_port_reset(XHCIPort *port) 
    usb_device_reset(port->uport->dev);



    switch (port->uport->dev->speed) {

    case USB_SPEED_SUPER:

        if (warm_reset) {

            port->portsc |= PORTSC_WRC;

        }

        /* fall through */

    case USB_SPEED_LOW:

    case USB_SPEED_FULL:

    case USB_SPEED_HIGH:
@@ -2845,8 +2850,12 @@ static void xhci_port_write(void *ptr, hwaddr reg, 
    switch (reg) {

    case 0x00: /* PORTSC */

        /* write-1-to-start bits */

        if (val & PORTSC_WPR) {

            xhci_port_reset(port, true);

            break;

        }

        if (val & PORTSC_PR) {

            xhci_port_reset(port);

            xhci_port_reset(port, false);

            break;

        }