/** @file

    USB bus enumeration interface.

Copyright (c) 2007, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution.  The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php

THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.

**/

#ifndef _USB_ENUMERATION_H_
#define _USB_ENUMERATION_H_

//
// Advance the byte and bit to the next bit, adjust byte accordingly.
//
#define USB_NEXT_BIT(Byte, Bit)   \
          do {                \
            (Bit)++;          \
            if ((Bit) > 7) {  \
              (Byte)++;       \
              (Bit) = 0;      \
            }                 \
          } while (0)


//
// Common interface used by usb bus enumeration process.
// This interface is defined to mask the difference between
// the root hub and normal hub. So, bus enumeration code
// can be shared by both root hub and normal hub
//
typedef
EFI_STATUS
(*USB_HUB_INIT) (
  IN USB_INTERFACE        *UsbIf
  );

//
// Get the port status. This function is required to
// ACK the port change bits although it will return
// the port changes in PortState. Bus enumeration code
// doesn't need to ACK the port change bits.
//
typedef
EFI_STATUS
(*USB_HUB_GET_PORT_STATUS) (
  IN  USB_INTERFACE       *UsbIf,
  IN  UINT8               Port,
  OUT EFI_USB_PORT_STATUS *PortState
  );

typedef
VOID
(*USB_HUB_CLEAR_PORT_CHANGE) (
  IN USB_INTERFACE        *HubIf,
  IN UINT8                Port
  );

typedef
EFI_STATUS
(*USB_HUB_SET_PORT_FEATURE) (
  IN USB_INTERFACE        *UsbIf,
  IN UINT8                Port,
  IN EFI_USB_PORT_FEATURE Feature
  );

typedef
EFI_STATUS
(*USB_HUB_CLEAR_PORT_FEATURE) (
  IN USB_INTERFACE        *UsbIf,
  IN UINT8                Port,
  IN EFI_USB_PORT_FEATURE Feature
  );

typedef
EFI_STATUS
(*USB_HUB_RESET_PORT) (
  IN USB_INTERFACE        *UsbIf,
  IN UINT8                Port
  );

typedef
EFI_STATUS
(*USB_HUB_RELEASE) (
  IN USB_INTERFACE        *UsbIf
  );

/**
  Return the endpoint descriptor in this interface.

  @param  UsbIf                 The interface to search in.
  @param  EpAddr                The address of the endpoint to return.

  @return The endpoint descriptor or NULL.

**/
USB_ENDPOINT_DESC*
UsbGetEndpointDesc (
  IN USB_INTERFACE        *UsbIf,
  IN UINT8                EpAddr
  );

/**
  Select an alternate setting for the interface.
  Each interface can have several mutually exclusive
  settings. Only one setting is active. It will
  also reset its endpoints' toggle to zero.

  @param  IfDesc                The interface descriptor to set.
  @param  Alternate             The alternate setting number to locate.

  @retval EFI_NOT_FOUND         There is no setting with this alternate index.
  @retval EFI_SUCCESS           The interface is set to Alternate setting.

**/
EFI_STATUS
UsbSelectSetting (
  IN USB_INTERFACE_DESC   *IfDesc,
  IN UINT8                Alternate
  );

/**
  Select a new configuration for the device. Each
  device may support several configurations.

  @param  Device                The device to select configuration.
  @param  ConfigIndex           The index of the configuration ( != 0).

  @retval EFI_NOT_FOUND         There is no configuration with the index.
  @retval EFI_OUT_OF_RESOURCES  Failed to allocate resource.
  @retval EFI_SUCCESS           The configuration is selected.

**/
EFI_STATUS
UsbSelectConfig (
  IN USB_DEVICE           *Device,
  IN UINT8                ConfigIndex
  );

/**
  Remove the current device configuration.

  @param  Device                The USB device to remove configuration from.

  @return None.

**/
EFI_STATUS
UsbRemoveConfig (
  IN USB_DEVICE           *Device
  );

/**
  Remove the device and all its children from the bus.

  @param  Device                The device to remove.

  @retval EFI_SUCCESS           The device is removed.

**/
EFI_STATUS
UsbRemoveDevice (
  IN USB_DEVICE           *Device
  );

/**
  Enumerate all the changed hub ports.

  @param  Event                 The event that is triggered.
  @param  Context               The context to the event.

  @return None.

**/
VOID
EFIAPI
UsbHubEnumeration (
  IN EFI_EVENT            Event,
  IN VOID                 *Context
  );

/**
  Enumerate all the changed hub ports.

  @param  Event                 The event that is triggered.
  @param  Context               The context to the event.

  @return None.

**/
VOID
EFIAPI
UsbRootHubEnumeration (
  IN EFI_EVENT            Event,
  IN VOID                 *Context
  );
#endif