--- /dev/null
+#ifndef __USB_HUB_H
+#define __USB_HUB_H
+
+// usb-hub.c
+struct usb_pipe;
+int usb_hub_init(struct usb_pipe *pipe);
+
+
+/****************************************************************
+ * hub flags
+ ****************************************************************/
+
+#define USB_DT_HUB (USB_TYPE_CLASS | 0x09)
+
+struct usb_hub_descriptor {
+ u8 bDescLength;
+ u8 bDescriptorType;
+ u8 bNbrPorts;
+ u16 wHubCharacteristics;
+ u8 bPwrOn2PwrGood;
+ u8 bHubContrCurrent;
+ // Variable length fields for DeviceRemovable[], PortPwrCtrlMask[] follow.
+} PACKED;
+
+#define USB_PORT_FEAT_CONNECTION 0
+#define USB_PORT_FEAT_ENABLE 1
+#define USB_PORT_FEAT_SUSPEND 2
+#define USB_PORT_FEAT_OVER_CURRENT 3
+#define USB_PORT_FEAT_RESET 4
+#define USB_PORT_FEAT_POWER 8
+#define USB_PORT_FEAT_LOWSPEED 9
+#define USB_PORT_FEAT_C_CONNECTION 16
+#define USB_PORT_FEAT_C_ENABLE 17
+#define USB_PORT_FEAT_C_SUSPEND 18
+#define USB_PORT_FEAT_C_OVER_CURRENT 19
+#define USB_PORT_FEAT_C_RESET 20
+#define USB_PORT_FEAT_TEST 21
+#define USB_PORT_FEAT_INDICATOR 22
+#define USB_PORT_FEAT_C_PORT_L1 23
+
+struct usb_port_status {
+ u16 wPortStatus;
+ u16 wPortChange;
+} PACKED;
+
+#define USB_PORT_STAT_CONNECTION 0x0001
+#define USB_PORT_STAT_ENABLE 0x0002
+#define USB_PORT_STAT_SUSPEND 0x0004
+#define USB_PORT_STAT_OVERCURRENT 0x0008
+#define USB_PORT_STAT_RESET 0x0010
+#define USB_PORT_STAT_L1 0x0020
+#define USB_PORT_STAT_POWER 0x0100
+#define USB_PORT_STAT_SPEED_SHIFT 9
+#define USB_PORT_STAT_SPEED_MASK (0x3 << USB_PORT_STAT_SPEED_SHIFT)
+#define USB_PORT_STAT_LOW_SPEED 0x0200
+#define USB_PORT_STAT_HIGH_SPEED 0x0400
+#define USB_PORT_STAT_TEST 0x0800
+#define USB_PORT_STAT_INDICATOR 0x1000
+
+#endif // ush-hid.h
