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xhci: implement warm port reset

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

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

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Gerd Hoffmann 2013-08-01 15:51:08 +02:00
parent 6fdf98f281
commit dad5b9ea08
1 changed files with 11 additions and 2 deletions
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13
hw/usb/hcd-xhci.c
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@ -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;
}