C++ (Cpp) UsbOpenHostProtoByChildの例

コード例 #1

ファイル: UsbEnumer.c プロジェクト: Clover-EFI-Bootloader/clover

/**
  Create an interface for the descriptor IfDesc. Each
  device's configuration can have several interfaces.

  @param  Device                The device has the interface descriptor.
  @param  IfDesc                The interface descriptor.

  @return The created USB interface for the descriptor, or NULL.

**/
USB_INTERFACE *
UsbCreateInterface (
  IN USB_DEVICE           *Device,
  IN USB_INTERFACE_DESC   *IfDesc
  )
{
  USB_DEVICE_PATH         UsbNode;
  USB_INTERFACE           *UsbIf;
  USB_INTERFACE           *HubIf;
  EFI_STATUS              Status;

  UsbIf = AllocateZeroPool (sizeof (USB_INTERFACE));

  if (UsbIf == NULL) {
    return NULL;
  }

  UsbIf->Signature  = USB_INTERFACE_SIGNATURE;
  UsbIf->Device     = Device;
  UsbIf->IfDesc     = IfDesc;
//  ASSERT (IfDesc->ActiveIndex < USB_MAX_INTERFACE_SETTING);
  if (IfDesc->ActiveIndex >= USB_MAX_INTERFACE_SETTING) {
    FreePool(UsbIf);
    return NULL;
  }
  UsbIf->IfSetting  = IfDesc->Settings[IfDesc->ActiveIndex];

  CopyMem (
    &(UsbIf->UsbIo),
    &mUsbIoProtocol,
    sizeof (EFI_USB_IO_PROTOCOL)
    );

  //
  // Install protocols for USBIO and device path
  //
  UsbNode.Header.Type       = MESSAGING_DEVICE_PATH;
  UsbNode.Header.SubType    = MSG_USB_DP;
  UsbNode.ParentPortNumber  = Device->ParentPort;
  UsbNode.InterfaceNumber   = UsbIf->IfSetting->Desc.InterfaceNumber;

  SetDevicePathNodeLength (&UsbNode.Header, sizeof (UsbNode));

  HubIf = Device->ParentIf;
//  ASSERT (HubIf != NULL);
  if (!HubIf) {
    return NULL;
  }

  UsbIf->DevicePath = AppendDevicePathNode (HubIf->DevicePath, &UsbNode.Header);

  if (UsbIf->DevicePath == NULL) {
 //   DEBUG ((EFI_D_ERROR, "UsbCreateInterface: failed to create device path\n"));
    DBG("UsbCreateInterface: failed to create device path\n");
    Status = EFI_OUT_OF_RESOURCES;
    goto ON_ERROR;
  }

  Status = gBS->InstallMultipleProtocolInterfaces (
                  &UsbIf->Handle,
                  &gEfiDevicePathProtocolGuid,
                  UsbIf->DevicePath,
                  &gEfiUsbIoProtocolGuid,
                  &UsbIf->UsbIo,
                  NULL
                  );

  if (EFI_ERROR (Status)) {
 //   DEBUG ((EFI_D_ERROR, "UsbCreateInterface: failed to install UsbIo - %r\n", Status));
    goto ON_ERROR;
  }

  //
  // Open USB Host Controller Protocol by Child
  //
  Status = UsbOpenHostProtoByChild (Device->Bus, UsbIf->Handle);

  if (EFI_ERROR (Status)) {
    gBS->UninstallMultipleProtocolInterfaces (
           &UsbIf->Handle,
           &gEfiDevicePathProtocolGuid,
           UsbIf->DevicePath,
           &gEfiUsbIoProtocolGuid,
           &UsbIf->UsbIo,
           NULL
           );

 //   DEBUG ((EFI_D_ERROR, "UsbCreateInterface: failed to open host for child - %r\n", Status));
    DBG("UsbCreateInterface: failed to open host for child - %r\n", Status);
    goto ON_ERROR;
  }

  return UsbIf;

ON_ERROR:
  if (UsbIf->DevicePath != NULL) {
    FreePool (UsbIf->DevicePath);
  }

  FreePool (UsbIf);
  return NULL;
}

コード例 #2

ファイル: UsbEnumer.c プロジェクト: Kohrara/edk

STATIC
USB_INTERFACE *
UsbCreateInterface (
  IN USB_DEVICE           *Device,
  IN USB_INTERFACE_DESC   *IfDesc
  )
/*++

Routine Description:

  Create an interface for the descriptor IfDesc. Each
  device's configuration can have several interfaces.

Arguments:

  Device  - The device has the interface descriptor
  IfDesc  - The interface descriptor

Returns:

  The created USB interface for the descriptor, or NULL.

--*/
{
  USB_DEVICE_PATH         UsbNode;
  USB_INTERFACE           *UsbIf;
  USB_INTERFACE           *HubIf;
  EFI_STATUS              Status;

  UsbIf = EfiLibAllocateZeroPool (sizeof (USB_INTERFACE));

  if (UsbIf == NULL) {
    return NULL;
  }

  UsbIf->Signature  = USB_INTERFACE_SIGNATURE;
  UsbIf->Device     = Device;
  UsbIf->IfDesc     = IfDesc;
  UsbIf->IfSetting  = IfDesc->Settings[IfDesc->ActiveIndex];
  UsbIf->UsbIo      = mUsbIoProtocol;
  
  //
  // Install protocols for USBIO and device path
  //
  UsbNode.Header.Type       = MESSAGING_DEVICE_PATH;
  UsbNode.Header.SubType    = MSG_USB_DP;
  UsbNode.ParentPortNumber  = Device->ParentPort;
  UsbNode.InterfaceNumber   = UsbIf->IfSetting->Desc.InterfaceNumber;

  SetDevicePathNodeLength (&UsbNode.Header, sizeof (UsbNode));

  HubIf = Device->ParentIf;
  ASSERT (HubIf != NULL);

  UsbIf->DevicePath = EfiAppendDevicePathNode (HubIf->DevicePath, &UsbNode.Header);

  if (UsbIf->DevicePath == NULL) {
    USB_ERROR (("UsbCreateInterface: failed to create device path\n"));

    Status = EFI_OUT_OF_RESOURCES;
    goto ON_ERROR;
  }

  Status = gBS->InstallMultipleProtocolInterfaces (
                  &UsbIf->Handle,
                  &gEfiDevicePathProtocolGuid,
                  UsbIf->DevicePath,
                  &gEfiUsbIoProtocolGuid,
                  &UsbIf->UsbIo,
                  NULL
                  );

  if (EFI_ERROR (Status)) {
    USB_ERROR (("UsbCreateInterface: failed to install UsbIo - %r\n", Status));
    goto ON_ERROR;
  }

  //
  // Open USB Host Controller Protocol by Child
  //
  Status = UsbOpenHostProtoByChild (Device->Bus, UsbIf->Handle);

  if (EFI_ERROR (Status)) {
    gBS->UninstallMultipleProtocolInterfaces (
           &UsbIf->Handle,
           &gEfiDevicePathProtocolGuid,
           UsbIf->DevicePath,
           &gEfiUsbIoProtocolGuid,
           &UsbIf->UsbIo,
           NULL
           );

    USB_ERROR (("UsbCreateInterface: failed to open host for child - %r\n", Status));
    goto ON_ERROR;
  }

  return UsbIf;

ON_ERROR:
  if (UsbIf->DevicePath) {
    gBS->FreePool (UsbIf->DevicePath);
  }

  gBS->FreePool (UsbIf);
  return NULL;
}