3 Provides some data structure definitions used by the XHCI host controller driver.
5 Copyright (c) 2011 - 2014, Intel Corporation. All rights reserved.<BR>
6 This program and the accompanying materials
7 are licensed and made available under the terms and conditions of the BSD License
8 which accompanies this distribution. The full text of the license may be found at
9 http://opensource.org/licenses/bsd-license.php
11 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
12 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
21 #include <Protocol/Usb2HostController.h>
22 #include <Protocol/PciIo.h>
24 #include <Guid/EventGroup.h>
26 #include <Library/BaseLib.h>
27 #include <Library/BaseMemoryLib.h>
28 #include <Library/UefiDriverEntryPoint.h>
29 #include <Library/UefiBootServicesTableLib.h>
30 #include <Library/MemoryAllocationLib.h>
31 #include <Library/UefiLib.h>
32 #include <Library/DebugLib.h>
33 #include <Library/ReportStatusCodeLib.h>
35 #include <IndustryStandard/Pci.h>
37 typedef struct _USB_XHCI_INSTANCE USB_XHCI_INSTANCE
;
38 typedef struct _USB_DEV_CONTEXT USB_DEV_CONTEXT
;
41 #include "XhciSched.h"
42 #include "ComponentName.h"
46 // The unit is microsecond, setting it as 1us.
48 #define XHC_1_MICROSECOND (1)
50 // Convert millisecond to microsecond.
52 #define XHC_1_MILLISECOND (1000)
54 // XHC generic timeout experience values.
55 // The unit is microsecond, setting it as 10ms.
57 #define XHC_GENERIC_TIMEOUT (10 * 1000)
59 // XHC reset timeout experience values.
60 // The unit is microsecond, setting it as 1s.
62 #define XHC_RESET_TIMEOUT (1000 * 1000)
64 // XHC delay experience value for polling operation.
65 // The unit is microsecond, set it as 1ms.
67 #define XHC_POLL_DELAY (1000)
69 // XHC async transfer timer interval, set by experience.
70 // The unit is 100us, takes 50ms as interval.
72 #define XHC_ASYNC_TIMER_INTERVAL EFI_TIMER_PERIOD_MILLISECONDS(50)
75 // XHC raises TPL to TPL_NOTIFY to serialize all its operations
76 // to protect shared data structures.
78 #define XHC_TPL TPL_NOTIFY
80 #define CMD_RING_TRB_NUMBER 0x100
81 #define TR_RING_TRB_NUMBER 0x100
82 #define ERST_NUMBER 0x01
83 #define EVENT_RING_TRB_NUMBER 0x200
89 #define INT_INTER_ASYNC 4
92 // Iterate through the doule linked list. This is delete-safe.
93 // Don't touch NextEntry
95 #define EFI_LIST_FOR_EACH_SAFE(Entry, NextEntry, ListHead) \
96 for (Entry = (ListHead)->ForwardLink, NextEntry = Entry->ForwardLink;\
97 Entry != (ListHead); Entry = NextEntry, NextEntry = Entry->ForwardLink)
99 #define EFI_LIST_CONTAINER(Entry, Type, Field) BASE_CR(Entry, Type, Field)
101 #define XHC_LOW_32BIT(Addr64) ((UINT32)(((UINTN)(Addr64)) & 0xFFFFFFFF))
102 #define XHC_HIGH_32BIT(Addr64) ((UINT32)(RShiftU64((UINT64)(UINTN)(Addr64), 32) & 0xFFFFFFFF))
103 #define XHC_BIT_IS_SET(Data, Bit) ((BOOLEAN)(((Data) & (Bit)) == (Bit)))
105 #define XHC_REG_BIT_IS_SET(Xhc, Offset, Bit) \
106 (XHC_BIT_IS_SET(XhcReadOpReg ((Xhc), (Offset)), (Bit)))
108 #define XHCI_IS_DATAIN(EndpointAddr) XHC_BIT_IS_SET((EndpointAddr), 0x80)
110 #define XHCI_INSTANCE_SIG SIGNATURE_32 ('x', 'h', 'c', 'i')
111 #define XHC_FROM_THIS(a) CR(a, USB_XHCI_INSTANCE, Usb2Hc, XHCI_INSTANCE_SIG)
113 #define USB_DESC_TYPE_HUB 0x29
114 #define USB_DESC_TYPE_HUB_SUPER_SPEED 0x2a
117 // The RequestType in EFI_USB_DEVICE_REQUEST is composed of
118 // three fields: One bit direction, 2 bit type, and 5 bit
121 #define USB_REQUEST_TYPE(Dir, Type, Target) \
122 ((UINT8)((((Dir) == EfiUsbDataIn ? 0x01 : 0) << 7) | (Type) | (Target)))
125 // Xhci Data and Ctrl Structures
140 UINT8 HubContrCurrent
;
142 } EFI_USB_HUB_DESCRIPTOR
;
145 struct _USB_DEV_CONTEXT
{
147 // Whether this entry in UsbDevContext array is used or not.
151 // The slot id assigned to the new device through XHCI's Enable_Slot cmd.
155 // The route string presented an attached usb device.
157 USB_DEV_ROUTE RouteString
;
159 // The route string of parent device if it exists. Otherwise it's zero.
161 USB_DEV_ROUTE ParentRouteString
;
163 // The actual device address assigned by XHCI through Address_Device command.
167 // The requested device address from UsbBus driver through Set_Address standard usb request.
168 // As XHCI spec replaces this request with Address_Device command, we have to record the
169 // requested device address and establish a mapping relationship with the actual device address.
170 // Then UsbBus driver just need to be aware of the requested device address to access usb device
171 // through EFI_USB2_HC_PROTOCOL. Xhci driver would be responsible for translating it to actual
172 // device address and access the actual device.
176 // The pointer to the input device context.
180 // The pointer to the output device context.
184 // The transfer queue for every endpoint.
186 VOID
*EndpointTransferRing
[31];
188 // The device descriptor which is stored to support XHCI's Evaluate_Context cmd.
190 EFI_USB_DEVICE_DESCRIPTOR DevDesc
;
192 // As a usb device may include multiple configuration descriptors, we dynamically allocate an array
194 // Note that every configuration descriptor stored here includes those lower level descriptors,
195 // such as Interface descriptor, Endpoint descriptor, and so on.
196 // These information is used to support XHCI's Config_Endpoint cmd.
198 EFI_USB_CONFIG_DESCRIPTOR
**ConfDesc
;
200 // A device has an active Configuration.
202 UINT8 ActiveConfiguration
;
204 // Every interface has an active AlternateSetting.
206 UINT8
*ActiveAlternateSetting
;
209 struct _USB_XHCI_INSTANCE
{
211 EFI_PCI_IO_PROTOCOL
*PciIo
;
212 UINT64 OriginalPciAttributes
;
213 USBHC_MEM_POOL
*MemPool
;
215 EFI_USB2_HC_PROTOCOL Usb2Hc
;
217 EFI_DEVICE_PATH_PROTOCOL
*DevicePath
;
220 // ExitBootServicesEvent is used to set OS semaphore and
221 // stop the XHC DMA operation after exit boot service.
223 EFI_EVENT ExitBootServiceEvent
;
225 LIST_ENTRY AsyncIntTransfers
;
227 UINT8 CapLength
; ///< Capability Register Length
228 XHC_HCSPARAMS1 HcSParams1
; ///< Structural Parameters 1
229 XHC_HCSPARAMS2 HcSParams2
; ///< Structural Parameters 2
230 XHC_HCCPARAMS HcCParams
; ///< Capability Parameters
231 UINT32 DBOff
; ///< Doorbell Offset
232 UINT32 RTSOff
; ///< Runtime Register Space Offset
237 UINT32 MaxScratchpadBufs
;
238 UINT64
*ScratchEntry
;
239 UINTN
*ScratchEntryMap
;
240 UINT32 ExtCapRegBase
;
241 UINT32 UsbLegSupOffset
;
242 UINT32 DebugCapSupOffset
;
249 TRANSFER_RING CmdRing
;
253 EVENT_RING EventRing
;
257 EFI_UNICODE_STRING_TABLE
*ControllerNameTable
;
260 // Store device contexts managed by XHCI instance
261 // The array supports up to 255 devices, entry 0 is reserved and should not be used.
263 USB_DEV_CONTEXT UsbDevContext
[256];
267 extern EFI_DRIVER_BINDING_PROTOCOL gXhciDriverBinding
;
268 extern EFI_COMPONENT_NAME_PROTOCOL gXhciComponentName
;
269 extern EFI_COMPONENT_NAME2_PROTOCOL gXhciComponentName2
;
272 Test to see if this driver supports ControllerHandle. Any
273 ControllerHandle that has Usb2HcProtocol installed will
276 @param This Protocol instance pointer.
277 @param Controller Handle of device to test.
278 @param RemainingDevicePath Not used.
280 @return EFI_SUCCESS This driver supports this device.
281 @return EFI_UNSUPPORTED This driver does not support this device.
286 XhcDriverBindingSupported (
287 IN EFI_DRIVER_BINDING_PROTOCOL
*This
,
288 IN EFI_HANDLE Controller
,
289 IN EFI_DEVICE_PATH_PROTOCOL
*RemainingDevicePath
293 Starting the Usb XHCI Driver.
295 @param This Protocol instance pointer.
296 @param Controller Handle of device to test.
297 @param RemainingDevicePath Not used.
299 @return EFI_SUCCESS supports this device.
300 @return EFI_UNSUPPORTED do not support this device.
301 @return EFI_DEVICE_ERROR cannot be started due to device Error.
302 @return EFI_OUT_OF_RESOURCES cannot allocate resources.
307 XhcDriverBindingStart (
308 IN EFI_DRIVER_BINDING_PROTOCOL
*This
,
309 IN EFI_HANDLE Controller
,
310 IN EFI_DEVICE_PATH_PROTOCOL
*RemainingDevicePath
314 Stop this driver on ControllerHandle. Support stoping any child handles
315 created by this driver.
317 @param This Protocol instance pointer.
318 @param Controller Handle of device to stop driver on.
319 @param NumberOfChildren Number of Children in the ChildHandleBuffer.
320 @param ChildHandleBuffer List of handles for the children we need to stop.
322 @return EFI_SUCCESS Success.
323 @return EFI_DEVICE_ERROR Fail.
328 XhcDriverBindingStop (
329 IN EFI_DRIVER_BINDING_PROTOCOL
*This
,
330 IN EFI_HANDLE Controller
,
331 IN UINTN NumberOfChildren
,
332 IN EFI_HANDLE
*ChildHandleBuffer
336 Retrieves the capability of root hub ports.
338 @param This The EFI_USB2_HC_PROTOCOL instance.
339 @param MaxSpeed Max speed supported by the controller.
340 @param PortNumber Number of the root hub ports.
341 @param Is64BitCapable Whether the controller supports 64-bit memory
344 @retval EFI_SUCCESS Host controller capability were retrieved successfully.
345 @retval EFI_INVALID_PARAMETER Either of the three capability pointer is NULL.
351 IN EFI_USB2_HC_PROTOCOL
*This
,
353 OUT UINT8
*PortNumber
,
354 OUT UINT8
*Is64BitCapable
358 Provides software reset for the USB host controller.
360 @param This This EFI_USB2_HC_PROTOCOL instance.
361 @param Attributes A bit mask of the reset operation to perform.
363 @retval EFI_SUCCESS The reset operation succeeded.
364 @retval EFI_INVALID_PARAMETER Attributes is not valid.
365 @retval EFI_UNSUPPOURTED The type of reset specified by Attributes is
366 not currently supported by the host controller.
367 @retval EFI_DEVICE_ERROR Host controller isn't halted to reset.
373 IN EFI_USB2_HC_PROTOCOL
*This
,
378 Retrieve the current state of the USB host controller.
380 @param This This EFI_USB2_HC_PROTOCOL instance.
381 @param State Variable to return the current host controller
384 @retval EFI_SUCCESS Host controller state was returned in State.
385 @retval EFI_INVALID_PARAMETER State is NULL.
386 @retval EFI_DEVICE_ERROR An error was encountered while attempting to
387 retrieve the host controller's current state.
393 IN EFI_USB2_HC_PROTOCOL
*This
,
394 OUT EFI_USB_HC_STATE
*State
398 Sets the USB host controller to a specific state.
400 @param This This EFI_USB2_HC_PROTOCOL instance.
401 @param State The state of the host controller that will be set.
403 @retval EFI_SUCCESS The USB host controller was successfully placed
404 in the state specified by State.
405 @retval EFI_INVALID_PARAMETER State is invalid.
406 @retval EFI_DEVICE_ERROR Failed to set the state due to device error.
412 IN EFI_USB2_HC_PROTOCOL
*This
,
413 IN EFI_USB_HC_STATE State
417 Retrieves the current status of a USB root hub port.
419 @param This This EFI_USB2_HC_PROTOCOL instance.
420 @param PortNumber The root hub port to retrieve the state from.
421 This value is zero-based.
422 @param PortStatus Variable to receive the port state.
424 @retval EFI_SUCCESS The status of the USB root hub port specified.
425 by PortNumber was returned in PortStatus.
426 @retval EFI_INVALID_PARAMETER PortNumber is invalid.
427 @retval EFI_DEVICE_ERROR Can't read register.
432 XhcGetRootHubPortStatus (
433 IN EFI_USB2_HC_PROTOCOL
*This
,
435 OUT EFI_USB_PORT_STATUS
*PortStatus
439 Sets a feature for the specified root hub port.
441 @param This This EFI_USB2_HC_PROTOCOL instance.
442 @param PortNumber Root hub port to set.
443 @param PortFeature Feature to set.
445 @retval EFI_SUCCESS The feature specified by PortFeature was set.
446 @retval EFI_INVALID_PARAMETER PortNumber is invalid or PortFeature is invalid.
447 @retval EFI_DEVICE_ERROR Can't read register.
452 XhcSetRootHubPortFeature (
453 IN EFI_USB2_HC_PROTOCOL
*This
,
455 IN EFI_USB_PORT_FEATURE PortFeature
459 Clears a feature for the specified root hub port.
461 @param This A pointer to the EFI_USB2_HC_PROTOCOL instance.
462 @param PortNumber Specifies the root hub port whose feature is
463 requested to be cleared.
464 @param PortFeature Indicates the feature selector associated with the
465 feature clear request.
467 @retval EFI_SUCCESS The feature specified by PortFeature was cleared
468 for the USB root hub port specified by PortNumber.
469 @retval EFI_INVALID_PARAMETER PortNumber is invalid or PortFeature is invalid.
470 @retval EFI_DEVICE_ERROR Can't read register.
475 XhcClearRootHubPortFeature (
476 IN EFI_USB2_HC_PROTOCOL
*This
,
478 IN EFI_USB_PORT_FEATURE PortFeature
482 Submits control transfer to a target USB device.
484 @param This This EFI_USB2_HC_PROTOCOL instance.
485 @param DeviceAddress The target device address.
486 @param DeviceSpeed Target device speed.
487 @param MaximumPacketLength Maximum packet size the default control transfer
488 endpoint is capable of sending or receiving.
489 @param Request USB device request to send.
490 @param TransferDirection Specifies the data direction for the data stage
491 @param Data Data buffer to be transmitted or received from USB
493 @param DataLength The size (in bytes) of the data buffer.
494 @param Timeout Indicates the maximum timeout, in millisecond.
495 @param Translator Transaction translator to be used by this device.
496 @param TransferResult Return the result of this control transfer.
498 @retval EFI_SUCCESS Transfer was completed successfully.
499 @retval EFI_OUT_OF_RESOURCES The transfer failed due to lack of resources.
500 @retval EFI_INVALID_PARAMETER Some parameters are invalid.
501 @retval EFI_TIMEOUT Transfer failed due to timeout.
502 @retval EFI_DEVICE_ERROR Transfer failed due to host controller or device error.
508 IN EFI_USB2_HC_PROTOCOL
*This
,
509 IN UINT8 DeviceAddress
,
510 IN UINT8 DeviceSpeed
,
511 IN UINTN MaximumPacketLength
,
512 IN EFI_USB_DEVICE_REQUEST
*Request
,
513 IN EFI_USB_DATA_DIRECTION TransferDirection
,
515 IN OUT UINTN
*DataLength
,
517 IN EFI_USB2_HC_TRANSACTION_TRANSLATOR
*Translator
,
518 OUT UINT32
*TransferResult
522 Submits bulk transfer to a bulk endpoint of a USB device.
524 @param This This EFI_USB2_HC_PROTOCOL instance.
525 @param DeviceAddress Target device address.
526 @param EndPointAddress Endpoint number and its direction in bit 7.
527 @param DeviceSpeed Device speed, Low speed device doesn't support bulk
529 @param MaximumPacketLength Maximum packet size the endpoint is capable of
530 sending or receiving.
531 @param DataBuffersNumber Number of data buffers prepared for the transfer.
532 @param Data Array of pointers to the buffers of data to transmit
533 from or receive into.
534 @param DataLength The lenght of the data buffer.
535 @param DataToggle On input, the initial data toggle for the transfer;
536 On output, it is updated to to next data toggle to
537 use of the subsequent bulk transfer.
538 @param Timeout Indicates the maximum time, in millisecond, which
539 the transfer is allowed to complete.
540 @param Translator A pointr to the transaction translator data.
541 @param TransferResult A pointer to the detailed result information of the
544 @retval EFI_SUCCESS The transfer was completed successfully.
545 @retval EFI_OUT_OF_RESOURCES The transfer failed due to lack of resource.
546 @retval EFI_INVALID_PARAMETER Some parameters are invalid.
547 @retval EFI_TIMEOUT The transfer failed due to timeout.
548 @retval EFI_DEVICE_ERROR The transfer failed due to host controller error.
554 IN EFI_USB2_HC_PROTOCOL
*This
,
555 IN UINT8 DeviceAddress
,
556 IN UINT8 EndPointAddress
,
557 IN UINT8 DeviceSpeed
,
558 IN UINTN MaximumPacketLength
,
559 IN UINT8 DataBuffersNumber
,
560 IN OUT VOID
*Data
[EFI_USB_MAX_BULK_BUFFER_NUM
],
561 IN OUT UINTN
*DataLength
,
562 IN OUT UINT8
*DataToggle
,
564 IN EFI_USB2_HC_TRANSACTION_TRANSLATOR
*Translator
,
565 OUT UINT32
*TransferResult
569 Submits an asynchronous interrupt transfer to an
570 interrupt endpoint of a USB device.
572 @param This This EFI_USB2_HC_PROTOCOL instance.
573 @param DeviceAddress Target device address.
574 @param EndPointAddress Endpoint number and its direction encoded in bit 7
575 @param DeviceSpeed Indicates device speed.
576 @param MaximumPacketLength Maximum packet size the target endpoint is capable
577 @param IsNewTransfer If TRUE, to submit an new asynchronous interrupt
578 transfer If FALSE, to remove the specified
579 asynchronous interrupt.
580 @param DataToggle On input, the initial data toggle to use; on output,
581 it is updated to indicate the next data toggle.
582 @param PollingInterval The he interval, in milliseconds, that the transfer
584 @param DataLength The length of data to receive at the rate specified
586 @param Translator Transaction translator to use.
587 @param CallBackFunction Function to call at the rate specified by
589 @param Context Context to CallBackFunction.
591 @retval EFI_SUCCESS The request has been successfully submitted or canceled.
592 @retval EFI_INVALID_PARAMETER Some parameters are invalid.
593 @retval EFI_OUT_OF_RESOURCES The request failed due to a lack of resources.
594 @retval EFI_DEVICE_ERROR The transfer failed due to host controller error.
599 XhcAsyncInterruptTransfer (
600 IN EFI_USB2_HC_PROTOCOL
*This
,
601 IN UINT8 DeviceAddress
,
602 IN UINT8 EndPointAddress
,
603 IN UINT8 DeviceSpeed
,
604 IN UINTN MaximumPacketLength
,
605 IN BOOLEAN IsNewTransfer
,
606 IN OUT UINT8
*DataToggle
,
607 IN UINTN PollingInterval
,
609 IN EFI_USB2_HC_TRANSACTION_TRANSLATOR
*Translator
,
610 IN EFI_ASYNC_USB_TRANSFER_CALLBACK CallBackFunction
,
611 IN VOID
*Context OPTIONAL
615 Submits synchronous interrupt transfer to an interrupt endpoint
618 @param This This EFI_USB2_HC_PROTOCOL instance.
619 @param DeviceAddress Target device address.
620 @param EndPointAddress Endpoint number and its direction encoded in bit 7
621 @param DeviceSpeed Indicates device speed.
622 @param MaximumPacketLength Maximum packet size the target endpoint is capable
623 of sending or receiving.
624 @param Data Buffer of data that will be transmitted to USB
625 device or received from USB device.
626 @param DataLength On input, the size, in bytes, of the data buffer; On
627 output, the number of bytes transferred.
628 @param DataToggle On input, the initial data toggle to use; on output,
629 it is updated to indicate the next data toggle.
630 @param Timeout Maximum time, in second, to complete.
631 @param Translator Transaction translator to use.
632 @param TransferResult Variable to receive the transfer result.
634 @return EFI_SUCCESS The transfer was completed successfully.
635 @return EFI_OUT_OF_RESOURCES The transfer failed due to lack of resource.
636 @return EFI_INVALID_PARAMETER Some parameters are invalid.
637 @return EFI_TIMEOUT The transfer failed due to timeout.
638 @return EFI_DEVICE_ERROR The failed due to host controller or device error
643 XhcSyncInterruptTransfer (
644 IN EFI_USB2_HC_PROTOCOL
*This
,
645 IN UINT8 DeviceAddress
,
646 IN UINT8 EndPointAddress
,
647 IN UINT8 DeviceSpeed
,
648 IN UINTN MaximumPacketLength
,
650 IN OUT UINTN
*DataLength
,
651 IN OUT UINT8
*DataToggle
,
653 IN EFI_USB2_HC_TRANSACTION_TRANSLATOR
*Translator
,
654 OUT UINT32
*TransferResult
658 Submits isochronous transfer to a target USB device.
660 @param This This EFI_USB2_HC_PROTOCOL instance.
661 @param DeviceAddress Target device address.
662 @param EndPointAddress End point address with its direction.
663 @param DeviceSpeed Device speed, Low speed device doesn't support this
665 @param MaximumPacketLength Maximum packet size that the endpoint is capable of
666 sending or receiving.
667 @param DataBuffersNumber Number of data buffers prepared for the transfer.
668 @param Data Array of pointers to the buffers of data that will
669 be transmitted to USB device or received from USB
671 @param DataLength The size, in bytes, of the data buffer.
672 @param Translator Transaction translator to use.
673 @param TransferResult Variable to receive the transfer result.
675 @return EFI_UNSUPPORTED Isochronous transfer is unsupported.
680 XhcIsochronousTransfer (
681 IN EFI_USB2_HC_PROTOCOL
*This
,
682 IN UINT8 DeviceAddress
,
683 IN UINT8 EndPointAddress
,
684 IN UINT8 DeviceSpeed
,
685 IN UINTN MaximumPacketLength
,
686 IN UINT8 DataBuffersNumber
,
687 IN OUT VOID
*Data
[EFI_USB_MAX_ISO_BUFFER_NUM
],
689 IN EFI_USB2_HC_TRANSACTION_TRANSLATOR
*Translator
,
690 OUT UINT32
*TransferResult
694 Submits Async isochronous transfer to a target USB device.
696 @param This This EFI_USB2_HC_PROTOCOL instance.
697 @param DeviceAddress Target device address.
698 @param EndPointAddress End point address with its direction.
699 @param DeviceSpeed Device speed, Low speed device doesn't support this
701 @param MaximumPacketLength Maximum packet size that the endpoint is capable of
702 sending or receiving.
703 @param DataBuffersNumber Number of data buffers prepared for the transfer.
704 @param Data Array of pointers to the buffers of data that will
705 be transmitted to USB device or received from USB
707 @param DataLength The size, in bytes, of the data buffer.
708 @param Translator Transaction translator to use.
709 @param IsochronousCallBack Function to be called when the transfer complete.
710 @param Context Context passed to the call back function as
713 @return EFI_UNSUPPORTED Isochronous transfer isn't supported.
718 XhcAsyncIsochronousTransfer (
719 IN EFI_USB2_HC_PROTOCOL
*This
,
720 IN UINT8 DeviceAddress
,
721 IN UINT8 EndPointAddress
,
722 IN UINT8 DeviceSpeed
,
723 IN UINTN MaximumPacketLength
,
724 IN UINT8 DataBuffersNumber
,
725 IN OUT VOID
*Data
[EFI_USB_MAX_ISO_BUFFER_NUM
],
727 IN EFI_USB2_HC_TRANSACTION_TRANSLATOR
*Translator
,
728 IN EFI_ASYNC_USB_TRANSFER_CALLBACK IsochronousCallBack
,