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[Qemu-devel] Wake OHCI up on device attach.

From: Andrzej Zaborowski
Subject: [Qemu-devel] Wake OHCI up on device attach.
Date: Sun, 19 Nov 2006 02:21:10 +0100

This makes linux detect new devices when they're attached with
"usb_add", if anyone cares.

OHCI manual (I checked in PXA27x manual to be exact) says a remote
wake-up should be sent when a device is attached and the host was
suspended.  A more general fix (but only UHCI) was posted in

 hw/usb-ohci.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/hw/usb-ohci.c b/hw/usb-ohci.c
index de113e9..9e4289a 100644
--- a/hw/usb-ohci.c
+++ b/hw/usb-ohci.c
@@ -295,6 +295,11 @@ static void ohci_attach(USBPort *port1,
             port->ctrl &= ~OHCI_PORT_LSDA;
         port->port.dev = dev;
+        /* notify of remote-wakeup */
+        if ((s->ctl & OHCI_CTL_HCFS) == OHCI_USB_SUSPEND)
+            ohci_set_interrupt(s, OHCI_INTR_RD);
         /* send the attach message */
         usb_send_msg(dev, USB_MSG_ATTACH);
         dprintf("usb-ohci: Attached port %d\n", port1->index);

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