3 Provides some data structure definitions used by the XHCI host controller driver.
5 Copyright (c) 2011 - 2015, 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 // The unit is microsecond, setting it as 1ms.
52 #define XHC_1_MILLISECOND (1000)
54 // XHC generic timeout experience values.
55 // The unit is millisecond, setting it as 10s.
57 #define XHC_GENERIC_TIMEOUT (10 * 1000)
59 // XHC reset timeout experience values.
60 // The unit is millisecond, setting it as 1s.
62 #define XHC_RESET_TIMEOUT (1000)
64 // XHC async transfer timer interval, set by experience.
65 // The unit is 100us, takes 1ms as interval.
67 #define XHC_ASYNC_TIMER_INTERVAL EFI_TIMER_PERIOD_MILLISECONDS(1)
70 // XHC raises TPL to TPL_NOTIFY to serialize all its operations
71 // to protect shared data structures.
73 #define XHC_TPL TPL_NOTIFY
75 #define CMD_RING_TRB_NUMBER 0x100
76 #define TR_RING_TRB_NUMBER 0x100
77 #define ERST_NUMBER 0x01
78 #define EVENT_RING_TRB_NUMBER 0x200
84 #define INT_INTER_ASYNC 4
87 // Iterate through the doule linked list. This is delete-safe.
88 // Don't touch NextEntry
90 #define EFI_LIST_FOR_EACH_SAFE(Entry, NextEntry, ListHead) \
91 for (Entry = (ListHead)->ForwardLink, NextEntry = Entry->ForwardLink;\
92 Entry != (ListHead); Entry = NextEntry, NextEntry = Entry->ForwardLink)
94 #define EFI_LIST_CONTAINER(Entry, Type, Field) BASE_CR(Entry, Type, Field)
96 #define XHC_LOW_32BIT(Addr64) ((UINT32)(((UINTN)(Addr64)) & 0xFFFFFFFF))
97 #define XHC_HIGH_32BIT(Addr64) ((UINT32)(RShiftU64((UINT64)(UINTN)(Addr64), 32) & 0xFFFFFFFF))
98 #define XHC_BIT_IS_SET(Data, Bit) ((BOOLEAN)(((Data) & (Bit)) == (Bit)))
100 #define XHC_REG_BIT_IS_SET(Xhc, Offset, Bit) \
101 (XHC_BIT_IS_SET(XhcReadOpReg ((Xhc), (Offset)), (Bit)))
103 #define XHCI_IS_DATAIN(EndpointAddr) XHC_BIT_IS_SET((EndpointAddr), 0x80)
105 #define XHCI_INSTANCE_SIG SIGNATURE_32 ('x', 'h', 'c', 'i')
106 #define XHC_FROM_THIS(a) CR(a, USB_XHCI_INSTANCE, Usb2Hc, XHCI_INSTANCE_SIG)
108 #define USB_DESC_TYPE_HUB 0x29
109 #define USB_DESC_TYPE_HUB_SUPER_SPEED 0x2a
112 // The RequestType in EFI_USB_DEVICE_REQUEST is composed of
113 // three fields: One bit direction, 2 bit type, and 5 bit
116 #define USB_REQUEST_TYPE(Dir, Type, Target) \
117 ((UINT8)((((Dir) == EfiUsbDataIn ? 0x01 : 0) << 7) | (Type) | (Target)))
120 // Xhci Data and Ctrl Structures
135 UINT8 HubContrCurrent
;
137 } EFI_USB_HUB_DESCRIPTOR
;
140 struct _USB_DEV_CONTEXT
{
142 // Whether this entry in UsbDevContext array is used or not.
146 // The slot id assigned to the new device through XHCI's Enable_Slot cmd.
150 // The route string presented an attached usb device.
152 USB_DEV_ROUTE RouteString
;
154 // The route string of parent device if it exists. Otherwise it's zero.
156 USB_DEV_ROUTE ParentRouteString
;
158 // The actual device address assigned by XHCI through Address_Device command.
162 // The requested device address from UsbBus driver through Set_Address standard usb request.
163 // As XHCI spec replaces this request with Address_Device command, we have to record the
164 // requested device address and establish a mapping relationship with the actual device address.
165 // Then UsbBus driver just need to be aware of the requested device address to access usb device
166 // through EFI_USB2_HC_PROTOCOL. Xhci driver would be responsible for translating it to actual
167 // device address and access the actual device.
171 // The pointer to the input device context.
175 // The pointer to the output device context.
179 // The transfer queue for every endpoint.
181 VOID
*EndpointTransferRing
[31];
183 // The device descriptor which is stored to support XHCI's Evaluate_Context cmd.
185 EFI_USB_DEVICE_DESCRIPTOR DevDesc
;
187 // As a usb device may include multiple configuration descriptors, we dynamically allocate an array
189 // Note that every configuration descriptor stored here includes those lower level descriptors,
190 // such as Interface descriptor, Endpoint descriptor, and so on.
191 // These information is used to support XHCI's Config_Endpoint cmd.
193 EFI_USB_CONFIG_DESCRIPTOR
**ConfDesc
;
195 // A device has an active Configuration.
197 UINT8 ActiveConfiguration
;
199 // Every interface has an active AlternateSetting.
201 UINT8
*ActiveAlternateSetting
;
204 struct _USB_XHCI_INSTANCE
{
206 EFI_PCI_IO_PROTOCOL
*PciIo
;
207 UINT64 OriginalPciAttributes
;
208 USBHC_MEM_POOL
*MemPool
;
210 EFI_USB2_HC_PROTOCOL Usb2Hc
;
212 EFI_DEVICE_PATH_PROTOCOL
*DevicePath
;
215 // ExitBootServicesEvent is used to set OS semaphore and
216 // stop the XHC DMA operation after exit boot service.
218 EFI_EVENT ExitBootServiceEvent
;
220 LIST_ENTRY AsyncIntTransfers
;
222 UINT8 CapLength
; ///< Capability Register Length
223 XHC_HCSPARAMS1 HcSParams1
; ///< Structural Parameters 1
224 XHC_HCSPARAMS2 HcSParams2
; ///< Structural Parameters 2
225 XHC_HCCPARAMS HcCParams
; ///< Capability Parameters
226 UINT32 DBOff
; ///< Doorbell Offset
227 UINT32 RTSOff
; ///< Runtime Register Space Offset
232 UINT32 MaxScratchpadBufs
;
233 UINT64
*ScratchEntry
;
234 UINTN
*ScratchEntryMap
;
235 UINT32 ExtCapRegBase
;
236 UINT32 UsbLegSupOffset
;
237 UINT32 DebugCapSupOffset
;
244 TRANSFER_RING CmdRing
;
248 EVENT_RING EventRing
;
252 EFI_UNICODE_STRING_TABLE
*ControllerNameTable
;
255 // Store device contexts managed by XHCI instance
256 // The array supports up to 255 devices, entry 0 is reserved and should not be used.
258 USB_DEV_CONTEXT UsbDevContext
[256];
262 extern EFI_DRIVER_BINDING_PROTOCOL gXhciDriverBinding
;
263 extern EFI_COMPONENT_NAME_PROTOCOL gXhciComponentName
;
264 extern EFI_COMPONENT_NAME2_PROTOCOL gXhciComponentName2
;
267 Test to see if this driver supports ControllerHandle. Any
268 ControllerHandle that has Usb2HcProtocol installed will
271 @param This Protocol instance pointer.
272 @param Controller Handle of device to test.
273 @param RemainingDevicePath Not used.
275 @return EFI_SUCCESS This driver supports this device.
276 @return EFI_UNSUPPORTED This driver does not support this device.
281 XhcDriverBindingSupported (
282 IN EFI_DRIVER_BINDING_PROTOCOL
*This
,
283 IN EFI_HANDLE Controller
,
284 IN EFI_DEVICE_PATH_PROTOCOL
*RemainingDevicePath
288 Starting the Usb XHCI Driver.
290 @param This Protocol instance pointer.
291 @param Controller Handle of device to test.
292 @param RemainingDevicePath Not used.
294 @return EFI_SUCCESS supports this device.
295 @return EFI_UNSUPPORTED do not support this device.
296 @return EFI_DEVICE_ERROR cannot be started due to device Error.
297 @return EFI_OUT_OF_RESOURCES cannot allocate resources.
302 XhcDriverBindingStart (
303 IN EFI_DRIVER_BINDING_PROTOCOL
*This
,
304 IN EFI_HANDLE Controller
,
305 IN EFI_DEVICE_PATH_PROTOCOL
*RemainingDevicePath
309 Stop this driver on ControllerHandle. Support stoping any child handles
310 created by this driver.
312 @param This Protocol instance pointer.
313 @param Controller Handle of device to stop driver on.
314 @param NumberOfChildren Number of Children in the ChildHandleBuffer.
315 @param ChildHandleBuffer List of handles for the children we need to stop.
317 @return EFI_SUCCESS Success.
318 @return EFI_DEVICE_ERROR Fail.
323 XhcDriverBindingStop (
324 IN EFI_DRIVER_BINDING_PROTOCOL
*This
,
325 IN EFI_HANDLE Controller
,
326 IN UINTN NumberOfChildren
,
327 IN EFI_HANDLE
*ChildHandleBuffer
331 Retrieves the capability of root hub ports.
333 @param This The EFI_USB2_HC_PROTOCOL instance.
334 @param MaxSpeed Max speed supported by the controller.
335 @param PortNumber Number of the root hub ports.
336 @param Is64BitCapable Whether the controller supports 64-bit memory
339 @retval EFI_SUCCESS Host controller capability were retrieved successfully.
340 @retval EFI_INVALID_PARAMETER Either of the three capability pointer is NULL.
346 IN EFI_USB2_HC_PROTOCOL
*This
,
348 OUT UINT8
*PortNumber
,
349 OUT UINT8
*Is64BitCapable
353 Provides software reset for the USB host controller.
355 @param This This EFI_USB2_HC_PROTOCOL instance.
356 @param Attributes A bit mask of the reset operation to perform.
358 @retval EFI_SUCCESS The reset operation succeeded.
359 @retval EFI_INVALID_PARAMETER Attributes is not valid.
360 @retval EFI_UNSUPPOURTED The type of reset specified by Attributes is
361 not currently supported by the host controller.
362 @retval EFI_DEVICE_ERROR Host controller isn't halted to reset.
368 IN EFI_USB2_HC_PROTOCOL
*This
,
373 Retrieve the current state of the USB host controller.
375 @param This This EFI_USB2_HC_PROTOCOL instance.
376 @param State Variable to return the current host controller
379 @retval EFI_SUCCESS Host controller state was returned in State.
380 @retval EFI_INVALID_PARAMETER State is NULL.
381 @retval EFI_DEVICE_ERROR An error was encountered while attempting to
382 retrieve the host controller's current state.
388 IN EFI_USB2_HC_PROTOCOL
*This
,
389 OUT EFI_USB_HC_STATE
*State
393 Sets the USB host controller to a specific state.
395 @param This This EFI_USB2_HC_PROTOCOL instance.
396 @param State The state of the host controller that will be set.
398 @retval EFI_SUCCESS The USB host controller was successfully placed
399 in the state specified by State.
400 @retval EFI_INVALID_PARAMETER State is invalid.
401 @retval EFI_DEVICE_ERROR Failed to set the state due to device error.
407 IN EFI_USB2_HC_PROTOCOL
*This
,
408 IN EFI_USB_HC_STATE State
412 Retrieves the current status of a USB root hub port.
414 @param This This EFI_USB2_HC_PROTOCOL instance.
415 @param PortNumber The root hub port to retrieve the state from.
416 This value is zero-based.
417 @param PortStatus Variable to receive the port state.
419 @retval EFI_SUCCESS The status of the USB root hub port specified.
420 by PortNumber was returned in PortStatus.
421 @retval EFI_INVALID_PARAMETER PortNumber is invalid.
422 @retval EFI_DEVICE_ERROR Can't read register.
427 XhcGetRootHubPortStatus (
428 IN EFI_USB2_HC_PROTOCOL
*This
,
430 OUT EFI_USB_PORT_STATUS
*PortStatus
434 Sets a feature for the specified root hub port.
436 @param This This EFI_USB2_HC_PROTOCOL instance.
437 @param PortNumber Root hub port to set.
438 @param PortFeature Feature to set.
440 @retval EFI_SUCCESS The feature specified by PortFeature was set.
441 @retval EFI_INVALID_PARAMETER PortNumber is invalid or PortFeature is invalid.
442 @retval EFI_DEVICE_ERROR Can't read register.
447 XhcSetRootHubPortFeature (
448 IN EFI_USB2_HC_PROTOCOL
*This
,
450 IN EFI_USB_PORT_FEATURE PortFeature
454 Clears a feature for the specified root hub port.
456 @param This A pointer to the EFI_USB2_HC_PROTOCOL instance.
457 @param PortNumber Specifies the root hub port whose feature is
458 requested to be cleared.
459 @param PortFeature Indicates the feature selector associated with the
460 feature clear request.
462 @retval EFI_SUCCESS The feature specified by PortFeature was cleared
463 for the USB root hub port specified by PortNumber.
464 @retval EFI_INVALID_PARAMETER PortNumber is invalid or PortFeature is invalid.
465 @retval EFI_DEVICE_ERROR Can't read register.
470 XhcClearRootHubPortFeature (
471 IN EFI_USB2_HC_PROTOCOL
*This
,
473 IN EFI_USB_PORT_FEATURE PortFeature
477 Submits control transfer to a target USB device.
479 @param This This EFI_USB2_HC_PROTOCOL instance.
480 @param DeviceAddress The target device address.
481 @param DeviceSpeed Target device speed.
482 @param MaximumPacketLength Maximum packet size the default control transfer
483 endpoint is capable of sending or receiving.
484 @param Request USB device request to send.
485 @param TransferDirection Specifies the data direction for the data stage
486 @param Data Data buffer to be transmitted or received from USB
488 @param DataLength The size (in bytes) of the data buffer.
489 @param Timeout Indicates the maximum timeout, in millisecond.
490 @param Translator Transaction translator to be used by this device.
491 @param TransferResult Return the result of this control transfer.
493 @retval EFI_SUCCESS Transfer was completed successfully.
494 @retval EFI_OUT_OF_RESOURCES The transfer failed due to lack of resources.
495 @retval EFI_INVALID_PARAMETER Some parameters are invalid.
496 @retval EFI_TIMEOUT Transfer failed due to timeout.
497 @retval EFI_DEVICE_ERROR Transfer failed due to host controller or device error.
503 IN EFI_USB2_HC_PROTOCOL
*This
,
504 IN UINT8 DeviceAddress
,
505 IN UINT8 DeviceSpeed
,
506 IN UINTN MaximumPacketLength
,
507 IN EFI_USB_DEVICE_REQUEST
*Request
,
508 IN EFI_USB_DATA_DIRECTION TransferDirection
,
510 IN OUT UINTN
*DataLength
,
512 IN EFI_USB2_HC_TRANSACTION_TRANSLATOR
*Translator
,
513 OUT UINT32
*TransferResult
517 Submits bulk transfer to a bulk endpoint of a USB device.
519 @param This This EFI_USB2_HC_PROTOCOL instance.
520 @param DeviceAddress Target device address.
521 @param EndPointAddress Endpoint number and its direction in bit 7.
522 @param DeviceSpeed Device speed, Low speed device doesn't support bulk
524 @param MaximumPacketLength Maximum packet size the endpoint is capable of
525 sending or receiving.
526 @param DataBuffersNumber Number of data buffers prepared for the transfer.
527 @param Data Array of pointers to the buffers of data to transmit
528 from or receive into.
529 @param DataLength The lenght of the data buffer.
530 @param DataToggle On input, the initial data toggle for the transfer;
531 On output, it is updated to to next data toggle to
532 use of the subsequent bulk transfer.
533 @param Timeout Indicates the maximum time, in millisecond, which
534 the transfer is allowed to complete.
535 @param Translator A pointr to the transaction translator data.
536 @param TransferResult A pointer to the detailed result information of the
539 @retval EFI_SUCCESS The transfer was completed successfully.
540 @retval EFI_OUT_OF_RESOURCES The transfer failed due to lack of resource.
541 @retval EFI_INVALID_PARAMETER Some parameters are invalid.
542 @retval EFI_TIMEOUT The transfer failed due to timeout.
543 @retval EFI_DEVICE_ERROR The transfer failed due to host controller error.
549 IN EFI_USB2_HC_PROTOCOL
*This
,
550 IN UINT8 DeviceAddress
,
551 IN UINT8 EndPointAddress
,
552 IN UINT8 DeviceSpeed
,
553 IN UINTN MaximumPacketLength
,
554 IN UINT8 DataBuffersNumber
,
555 IN OUT VOID
*Data
[EFI_USB_MAX_BULK_BUFFER_NUM
],
556 IN OUT UINTN
*DataLength
,
557 IN OUT UINT8
*DataToggle
,
559 IN EFI_USB2_HC_TRANSACTION_TRANSLATOR
*Translator
,
560 OUT UINT32
*TransferResult
564 Submits an asynchronous interrupt transfer to an
565 interrupt endpoint of a USB device.
567 @param This This EFI_USB2_HC_PROTOCOL instance.
568 @param DeviceAddress Target device address.
569 @param EndPointAddress Endpoint number and its direction encoded in bit 7
570 @param DeviceSpeed Indicates device speed.
571 @param MaximumPacketLength Maximum packet size the target endpoint is capable
572 @param IsNewTransfer If TRUE, to submit an new asynchronous interrupt
573 transfer If FALSE, to remove the specified
574 asynchronous interrupt.
575 @param DataToggle On input, the initial data toggle to use; on output,
576 it is updated to indicate the next data toggle.
577 @param PollingInterval The he interval, in milliseconds, that the transfer
579 @param DataLength The length of data to receive at the rate specified
581 @param Translator Transaction translator to use.
582 @param CallBackFunction Function to call at the rate specified by
584 @param Context Context to CallBackFunction.
586 @retval EFI_SUCCESS The request has been successfully submitted or canceled.
587 @retval EFI_INVALID_PARAMETER Some parameters are invalid.
588 @retval EFI_OUT_OF_RESOURCES The request failed due to a lack of resources.
589 @retval EFI_DEVICE_ERROR The transfer failed due to host controller error.
594 XhcAsyncInterruptTransfer (
595 IN EFI_USB2_HC_PROTOCOL
*This
,
596 IN UINT8 DeviceAddress
,
597 IN UINT8 EndPointAddress
,
598 IN UINT8 DeviceSpeed
,
599 IN UINTN MaximumPacketLength
,
600 IN BOOLEAN IsNewTransfer
,
601 IN OUT UINT8
*DataToggle
,
602 IN UINTN PollingInterval
,
604 IN EFI_USB2_HC_TRANSACTION_TRANSLATOR
*Translator
,
605 IN EFI_ASYNC_USB_TRANSFER_CALLBACK CallBackFunction
,
606 IN VOID
*Context OPTIONAL
610 Submits synchronous interrupt transfer to an interrupt endpoint
613 @param This This EFI_USB2_HC_PROTOCOL instance.
614 @param DeviceAddress Target device address.
615 @param EndPointAddress Endpoint number and its direction encoded in bit 7
616 @param DeviceSpeed Indicates device speed.
617 @param MaximumPacketLength Maximum packet size the target endpoint is capable
618 of sending or receiving.
619 @param Data Buffer of data that will be transmitted to USB
620 device or received from USB device.
621 @param DataLength On input, the size, in bytes, of the data buffer; On
622 output, the number of bytes transferred.
623 @param DataToggle On input, the initial data toggle to use; on output,
624 it is updated to indicate the next data toggle.
625 @param Timeout Maximum time, in second, to complete.
626 @param Translator Transaction translator to use.
627 @param TransferResult Variable to receive the transfer result.
629 @return EFI_SUCCESS The transfer was completed successfully.
630 @return EFI_OUT_OF_RESOURCES The transfer failed due to lack of resource.
631 @return EFI_INVALID_PARAMETER Some parameters are invalid.
632 @return EFI_TIMEOUT The transfer failed due to timeout.
633 @return EFI_DEVICE_ERROR The failed due to host controller or device error
638 XhcSyncInterruptTransfer (
639 IN EFI_USB2_HC_PROTOCOL
*This
,
640 IN UINT8 DeviceAddress
,
641 IN UINT8 EndPointAddress
,
642 IN UINT8 DeviceSpeed
,
643 IN UINTN MaximumPacketLength
,
645 IN OUT UINTN
*DataLength
,
646 IN OUT UINT8
*DataToggle
,
648 IN EFI_USB2_HC_TRANSACTION_TRANSLATOR
*Translator
,
649 OUT UINT32
*TransferResult
653 Submits isochronous transfer to a target USB device.
655 @param This This EFI_USB2_HC_PROTOCOL instance.
656 @param DeviceAddress Target device address.
657 @param EndPointAddress End point address with its direction.
658 @param DeviceSpeed Device speed, Low speed device doesn't support this
660 @param MaximumPacketLength Maximum packet size that the endpoint is capable of
661 sending or receiving.
662 @param DataBuffersNumber Number of data buffers prepared for the transfer.
663 @param Data Array of pointers to the buffers of data that will
664 be transmitted to USB device or received from USB
666 @param DataLength The size, in bytes, of the data buffer.
667 @param Translator Transaction translator to use.
668 @param TransferResult Variable to receive the transfer result.
670 @return EFI_UNSUPPORTED Isochronous transfer is unsupported.
675 XhcIsochronousTransfer (
676 IN EFI_USB2_HC_PROTOCOL
*This
,
677 IN UINT8 DeviceAddress
,
678 IN UINT8 EndPointAddress
,
679 IN UINT8 DeviceSpeed
,
680 IN UINTN MaximumPacketLength
,
681 IN UINT8 DataBuffersNumber
,
682 IN OUT VOID
*Data
[EFI_USB_MAX_ISO_BUFFER_NUM
],
684 IN EFI_USB2_HC_TRANSACTION_TRANSLATOR
*Translator
,
685 OUT UINT32
*TransferResult
689 Submits Async isochronous transfer to a target USB device.
691 @param This This EFI_USB2_HC_PROTOCOL instance.
692 @param DeviceAddress Target device address.
693 @param EndPointAddress End point address with its direction.
694 @param DeviceSpeed Device speed, Low speed device doesn't support this
696 @param MaximumPacketLength Maximum packet size that the endpoint is capable of
697 sending or receiving.
698 @param DataBuffersNumber Number of data buffers prepared for the transfer.
699 @param Data Array of pointers to the buffers of data that will
700 be transmitted to USB device or received from USB
702 @param DataLength The size, in bytes, of the data buffer.
703 @param Translator Transaction translator to use.
704 @param IsochronousCallBack Function to be called when the transfer complete.
705 @param Context Context passed to the call back function as
708 @return EFI_UNSUPPORTED Isochronous transfer isn't supported.
713 XhcAsyncIsochronousTransfer (
714 IN EFI_USB2_HC_PROTOCOL
*This
,
715 IN UINT8 DeviceAddress
,
716 IN UINT8 EndPointAddress
,
717 IN UINT8 DeviceSpeed
,
718 IN UINTN MaximumPacketLength
,
719 IN UINT8 DataBuffersNumber
,
720 IN OUT VOID
*Data
[EFI_USB_MAX_ISO_BUFFER_NUM
],
722 IN EFI_USB2_HC_TRANSACTION_TRANSLATOR
*Translator
,
723 IN EFI_ASYNC_USB_TRANSFER_CALLBACK IsochronousCallBack
,