#ifndef __LINUX_HUB_H
#define __LINUX_HUB_H

#include <linux/list.h>

/*
 * Hub feature numbers
 */
#define C_HUB_LOCAL_POWER	0
#define C_HUB_OVER_CURRENT	1

/*
 * Port feature numbers
 */
#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

/* wPortStatus */
#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_POWER		0x0100
#define USB_PORT_STAT_LOW_SPEED		0x0200

/* wPortChange */
#define USB_PORT_STAT_C_CONNECTION	0x0001
#define USB_PORT_STAT_C_ENABLE		0x0002
#define USB_PORT_STAT_C_SUSPEND		0x0004
#define USB_PORT_STAT_C_OVERCURRENT	0x0008
#define USB_PORT_STAT_C_RESET		0x0010

/* wHubCharacteristics (masks) */
#define HUB_CHAR_LPSM		0x0003
#define HUB_CHAR_COMPOUND	0x0004
#define HUB_CHAR_OCPM		0x0018

/* Hub descriptor */
struct usb_hub_descriptor {
	__u8  bLength;
	__u8  bDescriptorType;
	__u8  bNbrPorts;
	__u16 wHubCharacteristics;
#if 0
	__u8  wHubCharacteristics[2];   /* __u16 but not aligned! */
#endif
	__u8  bPwrOn2PwrGood;
	__u8  bHubContrCurrent;
	/* DeviceRemovable and PortPwrCtrlMask want to be variable-length 
	   bitmaps that hold max 256 entries, but for now they're ignored */
#if 0
	__u8  filler;
#endif
} __attribute__ ((packed));

struct usb_device;

typedef enum {
	USB_PORT_UNPOWERED = 0,		/* Default state */
	USB_PORT_POWERED,		/* When we've put power to it */
	USB_PORT_ENABLED,		/* When it's been enabled */
	USB_PORT_DISABLED,		/* If it's been disabled */
	USB_PORT_ADMINDISABLED,		/* Forced down */
} usb_hub_port_state;

struct usb_hub_port {
	usb_hub_port_state cstate;	/* Configuration state */

	struct usb_device *child;	/* Device attached to this port */

	struct usb_hub *parent;		/* Parent hub */
};

struct usb_hub {
	/* Device structure */
	struct usb_device *dev;

	/* Reference to the hub's polling IRQ and its associated pipe */
	void *irq_handle;
	unsigned int irqpipe;

	/* List of hubs */
	struct list_head hub_list;

	/* Temporary event list */
	struct list_head event_list;

	/* Number of ports on the hub */
	int nports;

	struct usb_hub_port ports[0];	/* Dynamically allocated */
};

#endif