C++ (Cpp) usb_bus_powerd示例

示例#1

文件： usb_controller.c 项目： FreeBSDFoundation/freebsd

/*------------------------------------------------------------------------*
 *	usb_bus_explore
 *
 * This function is used to explore the device tree from the root.
 *------------------------------------------------------------------------*/
static void
usb_bus_explore(struct usb_proc_msg *pm)
{
	struct usb_bus *bus;
	struct usb_device *udev;

	bus = ((struct usb_bus_msg *)pm)->bus;
	udev = bus->devices[USB_ROOT_HUB_ADDR];

	if (bus->no_explore != 0)
		return;

	if (udev != NULL) {
		USB_BUS_UNLOCK(bus);
		uhub_explore_handle_re_enumerate(udev);
		USB_BUS_LOCK(bus);
	}

	if (udev != NULL && udev->hub != NULL) {

		if (bus->do_probe) {
			bus->do_probe = 0;
			bus->driver_added_refcount++;
		}
		if (bus->driver_added_refcount == 0) {
			/* avoid zero, hence that is memory default */
			bus->driver_added_refcount = 1;
		}

#ifdef DDB
		/*
		 * The following three lines of code are only here to
		 * recover from DDB:
		 */
		usb_proc_rewakeup(USB_BUS_CONTROL_XFER_PROC(bus));
		usb_proc_rewakeup(USB_BUS_GIANT_PROC(bus));
		usb_proc_rewakeup(USB_BUS_NON_GIANT_ISOC_PROC(bus));
		usb_proc_rewakeup(USB_BUS_NON_GIANT_BULK_PROC(bus));
#endif

		USB_BUS_UNLOCK(bus);

#if USB_HAVE_POWERD
		/*
		 * First update the USB power state!
		 */
		usb_bus_powerd(bus);
#endif
		 /* Explore the Root USB HUB. */
		(udev->hub->explore) (udev);
		USB_BUS_LOCK(bus);
	}
#if USB_HAVE_ROOT_MOUNT_HOLD
	usb_root_mount_rel(bus);
#endif
}

示例#2

文件： usb_controller.c 项目： Gwenio/DragonFlyBSD

/*------------------------------------------------------------------------*
 *	usb_bus_explore
 *
 * This function is used to explore the device tree from the root.
 *------------------------------------------------------------------------*/
static void
usb_bus_explore(struct usb_proc_msg *pm)
{
	struct usb_bus *bus;
	struct usb_device *udev;

	bus = ((struct usb_bus_msg *)pm)->bus;
	udev = bus->devices[USB_ROOT_HUB_ADDR];

	if (bus->no_explore != 0)
		return;

	if (udev && udev->hub) {

		if (bus->do_probe) {
			bus->do_probe = 0;
			bus->driver_added_refcount++;
		}
		if (bus->driver_added_refcount == 0) {
			/* avoid zero, hence that is memory default */
			bus->driver_added_refcount = 1;
		}

#ifdef DDB
		/*
		 * The following three lines of code are only here to
		 * recover from DDB:
		 */
		usb_proc_rewakeup(&bus->control_xfer_proc);
		usb_proc_rewakeup(&bus->giant_callback_proc);
		usb_proc_rewakeup(&bus->non_giant_callback_proc);
#endif

		USB_BUS_UNLOCK(bus);

#if USB_HAVE_POWERD
		/*
		 * First update the USB power state!
		 */
		usb_bus_powerd(bus);
#endif
		 /* Explore the Root USB HUB. */
		(udev->hub->explore) (udev);
		USB_BUS_LOCK(bus);
	}
	usb_root_mount_rel(bus);
}