[mirror_edk2.git] / MdeModulePkg / Library / GenericBdsLib / BdsConnect.c

/** @file\r
  BDS Lib functions which relate with connect the device\r
\r
Copyright (c) 2004 - 2008, Intel Corporation. <BR>\r
All rights reserved. This program and the accompanying materials\r
are licensed and made available under the terms and conditions of the BSD License\r
which accompanies this distribution.  The full text of the license may be found at\r
http://opensource.org/licenses/bsd-license.php\r
\r
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
\r
**/\r
\r
#include "InternalBdsLib.h"\r
\r
\r
/**\r
  This function will connect all the system driver to controller\r
  first, and then special connect the default console, this make\r
  sure all the system controller avialbe and the platform default\r
  console connected.\r
\r
**/\r
VOID\r
EFIAPI\r
BdsLibConnectAll (\r
  VOID\r
  )\r
{\r
  //\r
  // Connect the platform console first\r
  //\r
  BdsLibConnectAllDefaultConsoles ();\r
\r
  //\r
  // Generic way to connect all the drivers\r
  //\r
  BdsLibConnectAllDriversToAllControllers ();\r
\r
  //\r
  // Here we have the assumption that we have already had\r
  // platform default console\r
  //\r
  BdsLibConnectAllDefaultConsoles ();\r
}\r
\r
\r
/**\r
  This function will connect all the system drivers to all controllers\r
  first, and then connect all the console devices the system current\r
  have. After this we should get all the device work and console avariable\r
  if the system have console device.\r
\r
**/\r
VOID\r
BdsLibGenericConnectAll (\r
  VOID\r
  )\r
{\r
  //\r
  // Most generic way to connect all the drivers\r
  //\r
  BdsLibConnectAllDriversToAllControllers ();\r
  BdsLibConnectAllConsoles ();\r
}\r
\r
\r
/**\r
  This function will create all handles associate with every device\r
  path node. If the handle associate with one device path node can not\r
  be created success, then still give one chance to do the dispatch,\r
  which load the missing drivers if possible.\r
\r
  @param  DevicePathToConnect   The device path which will be connected, it can be\r
                                a multi-instance device path\r
\r
  @retval EFI_SUCCESS           All handles associate with every device path  node\r
                                have been created\r
  @retval EFI_OUT_OF_RESOURCES  There is no resource to create new handles\r
  @retval EFI_NOT_FOUND         Create the handle associate with one device  path\r
                                node failed\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
BdsLibConnectDevicePath (\r
  IN EFI_DEVICE_PATH_PROTOCOL  *DevicePathToConnect\r
  )\r
{\r
  EFI_STATUS                Status;\r
  EFI_DEVICE_PATH_PROTOCOL  *DevicePath;\r
  EFI_DEVICE_PATH_PROTOCOL  *CopyOfDevicePath;\r
  EFI_DEVICE_PATH_PROTOCOL  *Instance;\r
  EFI_DEVICE_PATH_PROTOCOL  *RemainingDevicePath;\r
  EFI_DEVICE_PATH_PROTOCOL  *Next;\r
  EFI_HANDLE                Handle;\r
  EFI_HANDLE                PreviousHandle;\r
  UINTN                     Size;\r
\r
  if (DevicePathToConnect == NULL) {\r
    return EFI_SUCCESS;\r
  }\r
\r
  DevicePath        = DuplicateDevicePath (DevicePathToConnect);\r
  CopyOfDevicePath  = DevicePath;\r
  if (DevicePath == NULL) {\r
    return EFI_OUT_OF_RESOURCES;\r
  }\r
\r
  do {\r
    //\r
    // The outer loop handles multi instance device paths.\r
    // Only console variables contain multiple instance device paths.\r
    //\r
    // After this call DevicePath points to the next Instance\r
    //\r
    Instance  = GetNextDevicePathInstance (&DevicePath, &Size);\r
    Next      = Instance;\r
    while (!IsDevicePathEndType (Next)) {\r
      Next = NextDevicePathNode (Next);\r
    }\r
\r
    SetDevicePathEndNode (Next);\r
\r
    //\r
    // Start the real work of connect with RemainingDevicePath\r
    //\r
    PreviousHandle = NULL;\r
    do {\r
      //\r
      // Find the handle that best matches the Device Path. If it is only a\r
      // partial match the remaining part of the device path is returned in\r
      // RemainingDevicePath.\r
      //\r
      RemainingDevicePath = Instance;\r
      Status              = gBS->LocateDevicePath (&gEfiDevicePathProtocolGuid, &RemainingDevicePath, &Handle);\r
\r
      if (!EFI_ERROR (Status)) {\r
        if (Handle == PreviousHandle) {\r
          //\r
          // If no forward progress is made try invoking the Dispatcher.\r
          // A new FV may have been added to the system an new drivers\r
          // may now be found.\r
          // Status == EFI_SUCCESS means a driver was dispatched\r
          // Status == EFI_NOT_FOUND means no new drivers were dispatched\r
          //\r
          Status = gDS->Dispatch ();\r
        }\r
\r
        if (!EFI_ERROR (Status)) {\r
          PreviousHandle = Handle;\r
          //\r
          // Connect all drivers that apply to Handle and RemainingDevicePath,\r
          // the Recursive flag is FALSE so only one level will be expanded.\r
          //\r
          // Do not check the connect status here, if the connect controller fail,\r
          // then still give the chance to do dispatch, because partial\r
          // RemainingDevicepath may be in the new FV\r
          //\r
          // 1. If the connect fail, RemainingDevicepath and handle will not\r
          //    change, so next time will do the dispatch, then dispatch's status\r
          //    will take effect\r
          // 2. If the connect success, the RemainingDevicepath and handle will\r
          //    change, then avoid the dispatch, we have chance to continue the\r
          //    next connection\r
          //\r
          gBS->ConnectController (Handle, NULL, RemainingDevicePath, FALSE);\r
        }\r
      }\r
      //\r
      // Loop until RemainingDevicePath is an empty device path\r
      //\r
    } while (!EFI_ERROR (Status) && !IsDevicePathEnd (RemainingDevicePath));\r
\r
  } while (DevicePath != NULL);\r
\r
  if (CopyOfDevicePath != NULL) {\r
    FreePool (CopyOfDevicePath);\r
  }\r
  //\r
  // All handle with DevicePath exists in the handle database\r
  //\r
  return Status;\r
}\r
\r
\r
/**\r
  This function will connect all current system handles recursively. The\r
  connection will finish until every handle's child handle created if it have.\r
\r
  @retval EFI_SUCCESS           All handles and it's child handle have been\r
                                connected\r
  @retval EFI_STATUS            Return the status of gBS->LocateHandleBuffer().\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
BdsLibConnectAllEfi (\r
  VOID\r
  )\r
{\r
  EFI_STATUS  Status;\r
  UINTN       HandleCount;\r
  EFI_HANDLE  *HandleBuffer;\r
  UINTN       Index;\r
\r
  Status = gBS->LocateHandleBuffer (\r
                  AllHandles,\r
                  NULL,\r
                  NULL,\r
                  &HandleCount,\r
                  &HandleBuffer\r
                  );\r
  if (EFI_ERROR (Status)) {\r
    return Status;\r
  }\r
\r
  for (Index = 0; Index < HandleCount; Index++) {\r
    Status = gBS->ConnectController (HandleBuffer[Index], NULL, NULL, TRUE);\r
  }\r
\r
  if (HandleBuffer != NULL) {\r
    FreePool (HandleBuffer);\r
  }\r
\r
  return EFI_SUCCESS;\r
}\r
\r
\r
/**\r
  This function will disconnect all current system handles. The disconnection\r
  will finish until every handle have been disconnected.\r
\r
  @retval EFI_SUCCESS           All handles have been disconnected\r
  @retval EFI_STATUS            Return the status of gBS->LocateHandleBuffer().\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
BdsLibDisconnectAllEfi (\r
  VOID\r
  )\r
{\r
  EFI_STATUS  Status;\r
  UINTN       HandleCount;\r
  EFI_HANDLE  *HandleBuffer;\r
  UINTN       Index;\r
\r
  //\r
  // Disconnect all\r
  //\r
  Status = gBS->LocateHandleBuffer (\r
                  AllHandles,\r
                  NULL,\r
                  NULL,\r
                  &HandleCount,\r
                  &HandleBuffer\r
                  );\r
  if (EFI_ERROR (Status)) {\r
    return Status;\r
  }\r
\r
  for (Index = 0; Index < HandleCount; Index++) {\r
    Status = gBS->DisconnectController (HandleBuffer[Index], NULL, NULL);\r
  }\r
\r
  if (HandleBuffer != NULL) {\r
    FreePool (HandleBuffer);\r
  }\r
\r
  return EFI_SUCCESS;\r
}\r
\r
\r
/**\r
  Connects all drivers to all controllers.\r
  This function make sure all the current system driver will manage\r
  the correspoinding controllers if have. And at the same time, make\r
  sure all the system controllers have driver to manage it if have.\r
\r
**/\r
VOID\r
EFIAPI\r
BdsLibConnectAllDriversToAllControllers (\r
  VOID\r
  )\r
{\r
  EFI_STATUS  Status;\r
\r
  do {\r
    //\r
    // Connect All EFI 1.10 drivers following EFI 1.10 algorithm\r
    //\r
    BdsLibConnectAllEfi ();\r
\r
    //\r
    // Check to see if it's possible to dispatch an more DXE drivers.\r
    // The BdsLibConnectAllEfi () may have made new DXE drivers show up.\r
    // If anything is Dispatched Status == EFI_SUCCESS and we will try\r
    // the connect again.\r
    //\r
    Status = gDS->Dispatch ();\r
\r
  } while (!EFI_ERROR (Status));\r
\r
}\r
\r
\r
/**\r
  Connect the specific Usb device which match the short form device path,\r
  and whose bus is determined by Host Controller (Uhci or Ehci).\r
\r
  @param  HostControllerPI      Uhci (0x00) or Ehci (0x20) or Both uhci and ehci\r
                                (0xFF)\r
  @param  RemainingDevicePath   a short-form device path that starts with the first\r
                                element  being a USB WWID or a USB Class device\r
                                path\r
\r
  @return EFI_INVALID_PARAMETER\r
  @return EFI_SUCCESS\r
  @return EFI_NOT_FOUND\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
BdsLibConnectUsbDevByShortFormDP(\r
  IN UINT8                      HostControllerPI,\r
  IN EFI_DEVICE_PATH_PROTOCOL   *RemainingDevicePath\r
  )\r
{\r
  EFI_STATUS                            Status;\r
  EFI_HANDLE                            *HandleArray;\r
  UINTN                                 HandleArrayCount;\r
  UINTN                                 Index;\r
  EFI_PCI_IO_PROTOCOL                   *PciIo;\r
  UINT8                                 Class[3];\r
  BOOLEAN                               AtLeastOneConnected;\r
\r
  //\r
  // Check the passed in parameters\r
  //\r
  if (RemainingDevicePath == NULL) {\r
    return EFI_INVALID_PARAMETER;\r
  }\r
\r
  if ((DevicePathType (RemainingDevicePath) != MESSAGING_DEVICE_PATH) ||\r
      ((DevicePathSubType (RemainingDevicePath) != MSG_USB_CLASS_DP)\r
      && (DevicePathSubType (RemainingDevicePath) != MSG_USB_WWID_DP)\r
      )) {\r
    return EFI_INVALID_PARAMETER;\r
  }\r
\r
  if (HostControllerPI != 0xFF &&\r
      HostControllerPI != 0x00 &&\r
      HostControllerPI != 0x20) {\r
    return EFI_INVALID_PARAMETER;\r
  }\r
\r
  //\r
  // Find the usb host controller firstly, then connect with the remaining device path\r
  //\r
  AtLeastOneConnected = FALSE;\r
  Status = gBS->LocateHandleBuffer (\r
                  ByProtocol,\r
                  &gEfiPciIoProtocolGuid,\r
                  NULL,\r
                  &HandleArrayCount,\r
                  &HandleArray\r
                  );\r
  if (!EFI_ERROR (Status)) {\r
    for (Index = 0; Index < HandleArrayCount; Index++) {\r
      Status = gBS->HandleProtocol (\r
                      HandleArray[Index],\r
                      &gEfiPciIoProtocolGuid,\r
                      (VOID **)&PciIo\r
                      );\r
      if (!EFI_ERROR (Status)) {\r
        //\r
        // Check whether the Pci device is the wanted usb host controller\r
        //\r
        Status = PciIo->Pci.Read (PciIo, EfiPciIoWidthUint8, 0x09, 3, &Class);\r
        if (!EFI_ERROR (Status)) {\r
          if ((PCI_CLASS_SERIAL == Class[2]) &&\r
              (PCI_CLASS_SERIAL_USB == Class[1])) {\r
            if (HostControllerPI == Class[0] || HostControllerPI == 0xFF) {\r
              Status = gBS->ConnectController (\r
                              HandleArray[Index],\r
                              NULL,\r
                              RemainingDevicePath,\r
                              FALSE\r
                              );\r
              if (!EFI_ERROR(Status)) {\r
                AtLeastOneConnected = TRUE;\r
              }\r
            }\r
          }\r
        }\r
      }\r
    }\r
\r
    if (AtLeastOneConnected) {\r
      return EFI_SUCCESS;\r
    }\r
  }\r
\r
  return EFI_NOT_FOUND;\r
}\r
Commit	Line	Data
897f0eee	1	/** @file\r
	2	BDS Lib functions which relate with connect the device\r
	3	\r
	4	Copyright (c) 2004 - 2008, Intel Corporation. <BR>\r
	5	All rights reserved. This program and the accompanying materials\r
	6	are licensed and made available under the terms and conditions of the BSD License\r
	7	which accompanies this distribution. The full text of the license may be found at\r
	8	http://opensource.org/licenses/bsd-license.php\r
	9	\r
	10	THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
	11	WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
	12	\r
	13	**/\r
	14	\r
	15	#include "InternalBdsLib.h"\r
	16	\r
	17	\r
	18	/**\r
	19	This function will connect all the system driver to controller\r
	20	first, and then special connect the default console, this make\r
	21	sure all the system controller avialbe and the platform default\r
	22	console connected.\r
	23	\r
	24	**/\r
	25	VOID\r
	26	EFIAPI\r
	27	BdsLibConnectAll (\r
	28	VOID\r
	29	)\r
	30	{\r
	31	//\r
	32	// Connect the platform console first\r
	33	//\r
	34	BdsLibConnectAllDefaultConsoles ();\r
	35	\r
	36	//\r
	37	// Generic way to connect all the drivers\r
	38	//\r
	39	BdsLibConnectAllDriversToAllControllers ();\r
	40	\r
	41	//\r
	42	// Here we have the assumption that we have already had\r
	43	// platform default console\r
	44	//\r
	45	BdsLibConnectAllDefaultConsoles ();\r
	46	}\r
	47	\r
	48	\r
	49	/**\r
	50	This function will connect all the system drivers to all controllers\r
	51	first, and then connect all the console devices the system current\r
	52	have. After this we should get all the device work and console avariable\r
	53	if the system have console device.\r
	54	\r
897f0eee	55	**/\r
	56	VOID\r
	57	BdsLibGenericConnectAll (\r
	58	VOID\r
	59	)\r
	60	{\r
	61	//\r
	62	// Most generic way to connect all the drivers\r
	63	//\r
	64	BdsLibConnectAllDriversToAllControllers ();\r
	65	BdsLibConnectAllConsoles ();\r
	66	}\r
	67	\r
	68	\r
	69	/**\r
	70	This function will create all handles associate with every device\r
	71	path node. If the handle associate with one device path node can not\r
	72	be created success, then still give one chance to do the dispatch,\r
	73	which load the missing drivers if possible.\r
	74	\r
	75	@param DevicePathToConnect The device path which will be connected, it can be\r
	76	a multi-instance device path\r
	77	\r
	78	@retval EFI_SUCCESS All handles associate with every device path node\r
	79	have been created\r
	80	@retval EFI_OUT_OF_RESOURCES There is no resource to create new handles\r
	81	@retval EFI_NOT_FOUND Create the handle associate with one device path\r
	82	node failed\r
	83	\r
	84	**/\r
	85	EFI_STATUS\r
	86	EFIAPI\r
	87	BdsLibConnectDevicePath (\r
	88	IN EFI_DEVICE_PATH_PROTOCOL *DevicePathToConnect\r
	89	)\r
	90	{\r
	91	EFI_STATUS Status;\r
	92	EFI_DEVICE_PATH_PROTOCOL *DevicePath;\r
	93	EFI_DEVICE_PATH_PROTOCOL *CopyOfDevicePath;\r
	94	EFI_DEVICE_PATH_PROTOCOL *Instance;\r
	95	EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath;\r
	96	EFI_DEVICE_PATH_PROTOCOL *Next;\r
	97	EFI_HANDLE Handle;\r
	98	EFI_HANDLE PreviousHandle;\r
	99	UINTN Size;\r
	100	\r
	101	if (DevicePathToConnect == NULL) {\r
	102	return EFI_SUCCESS;\r
	103	}\r
	104	\r
	105	DevicePath = DuplicateDevicePath (DevicePathToConnect);\r
	106	CopyOfDevicePath = DevicePath;\r
	107	if (DevicePath == NULL) {\r
	108	return EFI_OUT_OF_RESOURCES;\r
	109	}\r
	110	\r
	111	do {\r
	112	//\r
	113	// The outer loop handles multi instance device paths.\r
	114	// Only console variables contain multiple instance device paths.\r
	115	//\r
	116	// After this call DevicePath points to the next Instance\r
	117	//\r
	118	Instance = GetNextDevicePathInstance (&DevicePath, &Size);\r
119	Next = Instance;\r
120	while (!IsDevicePathEndType (Next)) {\r
121	Next = NextDevicePathNode (Next);\r
122	}\r
123	\r
124	SetDevicePathEndNode (Next);\r
125	\r
126	//\r
127	// Start the real work of connect with RemainingDevicePath\r
128	//\r
129	PreviousHandle = NULL;\r
130	do {\r
131	//\r
132	// Find the handle that best matches the Device Path. If it is only a\r
133	// partial match the remaining part of the device path is returned in\r
134	// RemainingDevicePath.\r
135	//\r
136	RemainingDevicePath = Instance;\r
137	Status = gBS->LocateDevicePath (&gEfiDevicePathProtocolGuid, &RemainingDevicePath, &Handle);\r
138	\r
139	if (!EFI_ERROR (Status)) {\r
140	if (Handle == PreviousHandle) {\r
141	//\r
142	// If no forward progress is made try invoking the Dispatcher.\r
143	// A new FV may have been added to the system an new drivers\r
144	// may now be found.\r
145	// Status == EFI_SUCCESS means a driver was dispatched\r
146	// Status == EFI_NOT_FOUND means no new drivers were dispatched\r
147	//\r
148	Status = gDS->Dispatch ();\r
149	}\r
150	\r
151	if (!EFI_ERROR (Status)) {\r
152	PreviousHandle = Handle;\r
153	//\r
154	// Connect all drivers that apply to Handle and RemainingDevicePath,\r
155	// the Recursive flag is FALSE so only one level will be expanded.\r
156	//\r
157	// Do not check the connect status here, if the connect controller fail,\r
158	// then still give the chance to do dispatch, because partial\r
159	// RemainingDevicepath may be in the new FV\r
160	//\r
161	// 1. If the connect fail, RemainingDevicepath and handle will not\r
162	// change, so next time will do the dispatch, then dispatch's status\r
163	// will take effect\r
164	// 2. If the connect success, the RemainingDevicepath and handle will\r
165	// change, then avoid the dispatch, we have chance to continue the\r
166	// next connection\r
167	//\r
168	gBS->ConnectController (Handle, NULL, RemainingDevicePath, FALSE);\r
169	}\r
170	}\r
171	//\r
172	// Loop until RemainingDevicePath is an empty device path\r
173	//\r
174	} while (!EFI_ERROR (Status) && !IsDevicePathEnd (RemainingDevicePath));\r
175	\r
176	} while (DevicePath != NULL);\r
177	\r
178	if (CopyOfDevicePath != NULL) {\r
676df92c	179	FreePool (CopyOfDevicePath);\r
897f0eee	180	}\r
	181	//\r
	182	// All handle with DevicePath exists in the handle database\r
	183	//\r
	184	return Status;\r
	185	}\r
	186	\r
	187	\r
	188	/**\r
	189	This function will connect all current system handles recursively. The\r
	190	connection will finish until every handle's child handle created if it have.\r
	191	\r
	192	@retval EFI_SUCCESS All handles and it's child handle have been\r
	193	connected\r
	194	@retval EFI_STATUS Return the status of gBS->LocateHandleBuffer().\r
	195	\r
	196	**/\r
	197	EFI_STATUS\r
	198	EFIAPI\r
	199	BdsLibConnectAllEfi (\r
	200	VOID\r
	201	)\r
	202	{\r
	203	EFI_STATUS Status;\r
	204	UINTN HandleCount;\r
	205	EFI_HANDLE *HandleBuffer;\r
	206	UINTN Index;\r
	207	\r
	208	Status = gBS->LocateHandleBuffer (\r
	209	AllHandles,\r
	210	NULL,\r
	211	NULL,\r
	212	&HandleCount,\r
	213	&HandleBuffer\r
	214	);\r
	215	if (EFI_ERROR (Status)) {\r
	216	return Status;\r
	217	}\r
	218	\r
	219	for (Index = 0; Index < HandleCount; Index++) {\r
	220	Status = gBS->ConnectController (HandleBuffer[Index], NULL, NULL, TRUE);\r
	221	}\r
	222	\r
676df92c	223	if (HandleBuffer != NULL) {\r
	224	FreePool (HandleBuffer);\r
	225	}\r
897f0eee	226	\r
	227	return EFI_SUCCESS;\r
	228	}\r
	229	\r
	230	\r
	231	/**\r
	232	This function will disconnect all current system handles. The disconnection\r
	233	will finish until every handle have been disconnected.\r
	234	\r
	235	@retval EFI_SUCCESS All handles have been disconnected\r
	236	@retval EFI_STATUS Return the status of gBS->LocateHandleBuffer().\r
	237	\r
	238	**/\r
	239	EFI_STATUS\r
	240	EFIAPI\r
	241	BdsLibDisconnectAllEfi (\r
	242	VOID\r
	243	)\r
	244	{\r
	245	EFI_STATUS Status;\r
	246	UINTN HandleCount;\r
	247	EFI_HANDLE *HandleBuffer;\r
	248	UINTN Index;\r
	249	\r
	250	//\r
	251	// Disconnect all\r
	252	//\r
	253	Status = gBS->LocateHandleBuffer (\r
	254	AllHandles,\r
	255	NULL,\r
	256	NULL,\r
	257	&HandleCount,\r
	258	&HandleBuffer\r
	259	);\r
	260	if (EFI_ERROR (Status)) {\r
	261	return Status;\r
	262	}\r
	263	\r
	264	for (Index = 0; Index < HandleCount; Index++) {\r
	265	Status = gBS->DisconnectController (HandleBuffer[Index], NULL, NULL);\r
	266	}\r
	267	\r
676df92c	268	if (HandleBuffer != NULL) {\r
	269	FreePool (HandleBuffer);\r
	270	}\r
897f0eee	271	\r
	272	return EFI_SUCCESS;\r
	273	}\r
	274	\r
	275	\r
	276	/**\r
	277	Connects all drivers to all controllers.\r
	278	This function make sure all the current system driver will manage\r
	279	the correspoinding controllers if have. And at the same time, make\r
	280	sure all the system controllers have driver to manage it if have.\r
	281	\r
	282	**/\r
	283	VOID\r
	284	EFIAPI\r
	285	BdsLibConnectAllDriversToAllControllers (\r
	286	VOID\r
	287	)\r
	288	{\r
	289	EFI_STATUS Status;\r
	290	\r
	291	do {\r
	292	//\r
	293	// Connect All EFI 1.10 drivers following EFI 1.10 algorithm\r
	294	//\r
	295	BdsLibConnectAllEfi ();\r
	296	\r
	297	//\r
	298	// Check to see if it's possible to dispatch an more DXE drivers.\r
	299	// The BdsLibConnectAllEfi () may have made new DXE drivers show up.\r
	300	// If anything is Dispatched Status == EFI_SUCCESS and we will try\r
	301	// the connect again.\r
	302	//\r
	303	Status = gDS->Dispatch ();\r
	304	\r
	305	} while (!EFI_ERROR (Status));\r
	306	\r
	307	}\r
	308	\r
	309	\r
	310	/**\r
	311	Connect the specific Usb device which match the short form device path,\r
11ef23f9	312	and whose bus is determined by Host Controller (Uhci or Ehci).\r
897f0eee	313	\r
	314	@param HostControllerPI Uhci (0x00) or Ehci (0x20) or Both uhci and ehci\r
	315	(0xFF)\r
	316	@param RemainingDevicePath a short-form device path that starts with the first\r
	317	element being a USB WWID or a USB Class device\r
	318	path\r
	319	\r
	320	@return EFI_INVALID_PARAMETER\r
	321	@return EFI_SUCCESS\r
	322	@return EFI_NOT_FOUND\r
	323	\r
	324	**/\r
	325	EFI_STATUS\r
	326	EFIAPI\r
	327	BdsLibConnectUsbDevByShortFormDP(\r
	328	IN UINT8 HostControllerPI,\r
	329	IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath\r
	330	)\r
	331	{\r
	332	EFI_STATUS Status;\r
	333	EFI_HANDLE *HandleArray;\r
	334	UINTN HandleArrayCount;\r
	335	UINTN Index;\r
	336	EFI_PCI_IO_PROTOCOL *PciIo;\r
	337	UINT8 Class[3];\r
	338	BOOLEAN AtLeastOneConnected;\r
	339	\r
	340	//\r
	341	// Check the passed in parameters\r
	342	//\r
	343	if (RemainingDevicePath == NULL) {\r
	344	return EFI_INVALID_PARAMETER;\r
	345	}\r
	346	\r
	347	if ((DevicePathType (RemainingDevicePath) != MESSAGING_DEVICE_PATH) \|\|\r
	348	((DevicePathSubType (RemainingDevicePath) != MSG_USB_CLASS_DP)\r
	349	&& (DevicePathSubType (RemainingDevicePath) != MSG_USB_WWID_DP)\r
	350	)) {\r
	351	return EFI_INVALID_PARAMETER;\r
	352	}\r
	353	\r
	354	if (HostControllerPI != 0xFF &&\r
	355	HostControllerPI != 0x00 &&\r
	356	HostControllerPI != 0x20) {\r
	357	return EFI_INVALID_PARAMETER;\r
	358	}\r
	359	\r
	360	//\r
	361	// Find the usb host controller firstly, then connect with the remaining device path\r
	362	//\r
	363	AtLeastOneConnected = FALSE;\r
	364	Status = gBS->LocateHandleBuffer (\r
	365	ByProtocol,\r
	366	&gEfiPciIoProtocolGuid,\r
	367	NULL,\r
	368	&HandleArrayCount,\r
	369	&HandleArray\r
	370	);\r
	371	if (!EFI_ERROR (Status)) {\r
	372	for (Index = 0; Index < HandleArrayCount; Index++) {\r
	373	Status = gBS->HandleProtocol (\r
	374	HandleArray[Index],\r
	375	&gEfiPciIoProtocolGuid,\r
	376	(VOID **)&PciIo\r
377	);\r
378	if (!EFI_ERROR (Status)) {\r
379	//\r
380	// Check whether the Pci device is the wanted usb host controller\r
381	//\r
382	Status = PciIo->Pci.Read (PciIo, EfiPciIoWidthUint8, 0x09, 3, &Class);\r
383	if (!EFI_ERROR (Status)) {\r
384	if ((PCI_CLASS_SERIAL == Class[2]) &&\r
385	(PCI_CLASS_SERIAL_USB == Class[1])) {\r
386	if (HostControllerPI == Class[0] \|\| HostControllerPI == 0xFF) {\r
387	Status = gBS->ConnectController (\r
388	HandleArray[Index],\r
389	NULL,\r
390	RemainingDevicePath,\r
391	FALSE\r
392	);\r
393	if (!EFI_ERROR(Status)) {\r
394	AtLeastOneConnected = TRUE;\r
395	}\r
396	}\r
397	}\r
398	}\r
399	}\r
400	}\r
401	\r
402	if (AtLeastOneConnected) {\r
403	return EFI_SUCCESS;\r
404	}\r
405	}\r
406	\r
407	return EFI_NOT_FOUND;\r
408	}\r