47 struct usb_bus {  struct
49 	struct root_hold_token *bus_roothold;
80 	struct usb_bus_msg explore_msg[2];  argument
81 	struct usb_bus_msg detach_msg[2];  argument
82 	struct usb_bus_msg attach_msg[2];  argument
83 	struct usb_bus_msg suspend_msg[2];  argument
84 	struct usb_bus_msg resume_msg[2];  argument
85 	struct usb_bus_msg reset_msg[2];  argument
86 	struct usb_bus_msg shutdown_msg[2];  argument
88 	struct usb_bus_msg cleanup_msg[2];  argument
106 	const struct usb_bus_methods *methods;	/* filled by HC driver */  argument
107 	struct usb_device **devices;
109 	struct ifnet *ifp;	/* only for USB Packet Filter */
111 	usb_power_mask_t hw_power_state;	/* see USB_HW_POWER_XXX */
112 	usb_size_t uframe_usage[USB_HS_MICRO_FRAMES_MAX];
114 	uint16_t isoc_time_last;	/* in milliseconds */
116 	uint8_t	alloc_failed;		/* Set if memory allocation failed. */
117 	uint8_t	driver_added_refcount;	/* Current driver generation count */
118 	enum usb_revision usbrev;	/* USB revision. See "USB_REV_XXX". */
120 	uint8_t	devices_max;		/* maximum number of USB devices */
121 	uint8_t	do_probe;		/* set if USB should be re-probed */
122 	uint8_t no_explore;		/* don't explore USB ports */
123 	uint8_t dma_bits;		/* number of DMA address lines */
124 	uint8_t control_ep_quirk;	/* need 64kByte buffer for data stage */