diff options
Diffstat (limited to 'MdeModulePkg/Bus/Pci/XhciDxe/XhciReg.c')
| -rw-r--r-- | MdeModulePkg/Bus/Pci/XhciDxe/XhciReg.c | 827 |
1 files changed, 827 insertions, 0 deletions
diff --git a/MdeModulePkg/Bus/Pci/XhciDxe/XhciReg.c b/MdeModulePkg/Bus/Pci/XhciDxe/XhciReg.c new file mode 100644 index 0000000000..f5e66e4f3b --- /dev/null +++ b/MdeModulePkg/Bus/Pci/XhciDxe/XhciReg.c @@ -0,0 +1,827 @@ +/** @file
+
+ The XHCI register operation routines.
+
+Copyright (c) 2011, 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.
+
+**/
+
+#include "Xhci.h"
+
+/**
+ Read 1-byte width XHCI capability register.
+
+ @param Xhc The XHCI device.
+ @param Offset The offset of the 1-byte width capability register.
+
+ @return The register content read.
+ @retval If err, return 0xFF.
+
+**/
+UINT8
+XhcReadCapReg8 (
+ IN USB_XHCI_DEV *Xhc,
+ IN UINT32 Offset
+ )
+{
+ UINT8 Data;
+ EFI_STATUS Status;
+
+ Status = Xhc->PciIo->Mem.Read (
+ Xhc->PciIo,
+ EfiPciIoWidthUint8,
+ XHC_BAR_INDEX,
+ (UINT64) Offset,
+ 1,
+ &Data
+ );
+
+ if (EFI_ERROR (Status)) {
+ DEBUG ((EFI_D_ERROR, "XhcReadCapReg: Pci Io read error - %r at %d\n", Status, Offset));
+ Data = 0xFF;
+ }
+
+ return Data;
+}
+
+/**
+ Read 4-bytes width XHCI capability register.
+
+ @param Xhc The XHCI device.
+ @param Offset The offset of the 4-bytes width capability register.
+
+ @return The register content read.
+ @retval If err, return 0xFFFFFFFF.
+
+**/
+UINT32
+XhcReadCapReg (
+ IN USB_XHCI_DEV *Xhc,
+ IN UINT32 Offset
+ )
+{
+ UINT32 Data;
+ EFI_STATUS Status;
+
+ Status = Xhc->PciIo->Mem.Read (
+ Xhc->PciIo,
+ EfiPciIoWidthUint32,
+ XHC_BAR_INDEX,
+ (UINT64) Offset,
+ 1,
+ &Data
+ );
+
+ if (EFI_ERROR (Status)) {
+ DEBUG ((EFI_D_ERROR, "XhcReadCapReg: Pci Io read error - %r at %d\n", Status, Offset));
+ Data = 0xFFFFFFFF;
+ }
+
+ return Data;
+}
+
+/**
+ Read 4-bytes width XHCI Operational register.
+
+ @param Xhc The XHCI device.
+ @param Offset The offset of the 4-bytes width operational register.
+
+ @return The register content read.
+ @retval If err, return 0xFFFFFFFF.
+
+**/
+UINT32
+XhcReadOpReg (
+ IN USB_XHCI_DEV *Xhc,
+ IN UINT32 Offset
+ )
+{
+ UINT32 Data;
+ EFI_STATUS Status;
+
+ ASSERT (Xhc->CapLength != 0);
+
+ Status = Xhc->PciIo->Mem.Read (
+ Xhc->PciIo,
+ EfiPciIoWidthUint32,
+ XHC_BAR_INDEX,
+ (UINT64) (Xhc->CapLength + Offset),
+ 1,
+ &Data
+ );
+
+ if (EFI_ERROR (Status)) {
+ DEBUG ((EFI_D_ERROR, "XhcReadOpReg: Pci Io Read error - %r at %d\n", Status, Offset));
+ Data = 0xFFFFFFFF;
+ }
+
+ return Data;
+}
+
+/**
+ Write the data to the 4-bytes width XHCI operational register.
+
+ @param Xhc The XHCI device.
+ @param Offset The offset of the 4-bytes width operational register.
+ @param Data The data to write.
+
+**/
+VOID
+XhcWriteOpReg (
+ IN USB_XHCI_DEV *Xhc,
+ IN UINT32 Offset,
+ IN UINT32 Data
+ )
+{
+ EFI_STATUS Status;
+
+ ASSERT (Xhc->CapLength != 0);
+
+ Status = Xhc->PciIo->Mem.Write (
+ Xhc->PciIo,
+ EfiPciIoWidthUint32,
+ XHC_BAR_INDEX,
+ (UINT64) (Xhc->CapLength + Offset),
+ 1,
+ &Data
+ );
+
+ if (EFI_ERROR (Status)) {
+ DEBUG ((EFI_D_ERROR, "XhcWriteOpReg: Pci Io Write error: %r at %d\n", Status, Offset));
+ }
+}
+
+/**
+ Write the data to the 2-bytes width XHCI operational register.
+
+ @param Xhc The XHCI device.
+ @param Offset The offset of the 2-bytes width operational register.
+ @param Data The data to write.
+
+**/
+VOID
+XhcWriteOpReg16 (
+ IN USB_XHCI_DEV *Xhc,
+ IN UINT32 Offset,
+ IN UINT16 Data
+ )
+{
+ EFI_STATUS Status;
+
+ ASSERT (Xhc->CapLength != 0);
+
+ Status = Xhc->PciIo->Mem.Write (
+ Xhc->PciIo,
+ EfiPciIoWidthUint16,
+ XHC_BAR_INDEX,
+ (UINT64) (Xhc->CapLength + Offset),
+ 1,
+ &Data
+ );
+
+ if (EFI_ERROR (Status)) {
+ DEBUG ((EFI_D_ERROR, "XhcWriteOpReg16: Pci Io Write error: %r at %d\n", Status, Offset));
+ }
+}
+
+/**
+ Write the data to the 8-bytes width XHCI operational register.
+
+ @param Xhc The XHCI device.
+ @param Offset The offset of the 8-bytes width operational register.
+ @param Data The data to write.
+
+**/
+VOID
+XhcWriteOpReg64 (
+ IN USB_XHCI_DEV *Xhc,
+ IN UINT32 Offset,
+ IN UINT64 Data
+ )
+{
+ EFI_STATUS Status;
+
+ ASSERT (Xhc->CapLength != 0);
+
+ Status = Xhc->PciIo->Mem.Write (
+ Xhc->PciIo,
+ EfiPciIoWidthUint64,
+ XHC_BAR_INDEX,
+ (UINT64) (Xhc->CapLength + Offset),
+ 1,
+ &Data
+ );
+
+ if (EFI_ERROR (Status)) {
+ DEBUG ((EFI_D_ERROR, "XhcWriteOpReg64: Pci Io Write error: %r at %d\n", Status, Offset));
+ }
+}
+
+/**
+ Read XHCI door bell register.
+
+ @param Xhc The XHCI device.
+ @param Offset The offset of the door bell register.
+
+ @return The register content read
+
+**/
+UINT32
+XhcReadDoorBellReg (
+ IN USB_XHCI_DEV *Xhc,
+ IN UINT32 Offset
+ )
+{
+ UINT32 Data;
+ EFI_STATUS Status;
+
+ ASSERT (Xhc->DBOff != 0);
+
+ Status = Xhc->PciIo->Mem.Read (
+ Xhc->PciIo,
+ EfiPciIoWidthUint32,
+ XHC_BAR_INDEX,
+ (UINT64) (Xhc->DBOff + Offset),
+ 1,
+ &Data
+ );
+
+ if (EFI_ERROR (Status)) {
+ DEBUG ((EFI_D_ERROR, "XhcReadDoorBellReg: Pci Io Read error - %r at %d\n", Status, Offset));
+ Data = 0xFFFFFFFF;
+ }
+
+ return Data;
+}
+
+/**
+ Write the data to the XHCI door bell register.
+
+ @param Xhc The XHCI device.
+ @param Offset The offset of the door bell register.
+ @param Data The data to write.
+
+**/
+VOID
+XhcWriteDoorBellReg (
+ IN USB_XHCI_DEV *Xhc,
+ IN UINT32 Offset,
+ IN UINT32 Data
+ )
+{
+ EFI_STATUS Status;
+
+ ASSERT (Xhc->DBOff != 0);
+
+ Status = Xhc->PciIo->Mem.Write (
+ Xhc->PciIo,
+ EfiPciIoWidthUint32,
+ XHC_BAR_INDEX,
+ (UINT64) (Xhc->DBOff + Offset),
+ 1,
+ &Data
+ );
+
+ if (EFI_ERROR (Status)) {
+ DEBUG ((EFI_D_ERROR, "XhcWriteOpReg: Pci Io Write error: %r at %d\n", Status, Offset));
+ }
+}
+
+/**
+ Read XHCI runtime register.
+
+ @param Xhc The XHCI device.
+ @param Offset The offset of the runtime register.
+
+ @return The register content read
+
+**/
+UINT32
+XhcReadRuntimeReg (
+ IN USB_XHCI_DEV *Xhc,
+ IN UINT32 Offset
+ )
+{
+ UINT32 Data;
+ EFI_STATUS Status;
+
+ ASSERT (Xhc->RTSOff != 0);
+
+ Status = Xhc->PciIo->Mem.Read (
+ Xhc->PciIo,
+ EfiPciIoWidthUint32,
+ XHC_BAR_INDEX,
+ (UINT64) (Xhc->RTSOff + Offset),
+ 1,
+ &Data
+ );
+
+ if (EFI_ERROR (Status)) {
+ DEBUG ((EFI_D_ERROR, "XhcReadRuntimeReg: Pci Io Read error - %r at %d\n", Status, Offset));
+ Data = 0xFFFFFFFF;
+ }
+
+ return Data;
+}
+
+/**
+ Read 8-bytes width XHCI runtime register.
+
+ @param Xhc The XHCI device.
+ @param Offset The offset of the 8-bytes width runtime register.
+
+ @return The register content read
+
+**/
+UINT64
+XhcReadRuntimeReg64 (
+ IN USB_XHCI_DEV *Xhc,
+ IN UINT32 Offset
+ )
+{
+ UINT64 Data;
+ EFI_STATUS Status;
+
+ ASSERT (Xhc->RTSOff != 0);
+
+ Status = Xhc->PciIo->Mem.Read (
+ Xhc->PciIo,
+ EfiPciIoWidthUint64,
+ XHC_BAR_INDEX,
+ (UINT64) (Xhc->RTSOff + Offset),
+ 1,
+ &Data
+ );
+
+ if (EFI_ERROR (Status)) {
+ DEBUG ((EFI_D_ERROR, "XhcReadRuntimeReg64: Pci Io Read error - %r at %d\n", Status, Offset));
+ Data = 0xFFFFFFFFFFFFFFFF;
+ }
+
+ return Data;
+}
+
+/**
+ Write the data to the XHCI runtime register.
+
+ @param Xhc The XHCI device.
+ @param Offset The offset of the runtime register.
+ @param Data The data to write.
+
+**/
+VOID
+XhcWriteRuntimeReg (
+ IN USB_XHCI_DEV *Xhc,
+ IN UINT32 Offset,
+ IN UINT32 Data
+ )
+{
+ EFI_STATUS Status;
+
+ ASSERT (Xhc->RTSOff != 0);
+
+ Status = Xhc->PciIo->Mem.Write (
+ Xhc->PciIo,
+ EfiPciIoWidthUint32,
+ XHC_BAR_INDEX,
+ (UINT64) (Xhc->RTSOff + Offset),
+ 1,
+ &Data
+ );
+
+ if (EFI_ERROR (Status)) {
+ DEBUG ((EFI_D_ERROR, "XhcWriteRuntimeReg: Pci Io Write error: %r at %d\n", Status, Offset));
+ }
+}
+
+/**
+ Write the data to the 8-bytes width XHCI runtime register.
+
+ @param Xhc The XHCI device.
+ @param Offset The offset of the 8-bytes width runtime register.
+ @param Data The data to write.
+
+**/
+VOID
+XhcWriteRuntimeReg64 (
+ IN USB_XHCI_DEV *Xhc,
+ IN UINT32 Offset,
+ IN UINT64 Data
+ )
+{
+ EFI_STATUS Status;
+
+ ASSERT (Xhc->RTSOff != 0);
+
+ Status = Xhc->PciIo->Mem.Write (
+ Xhc->PciIo,
+ EfiPciIoWidthUint64,
+ XHC_BAR_INDEX,
+ (UINT64) (Xhc->RTSOff + Offset),
+ 1,
+ &Data
+ );
+
+ if (EFI_ERROR (Status)) {
+ DEBUG ((EFI_D_ERROR, "XhcWriteRuntimeReg64: Pci Io Write error: %r at %d\n", Status, Offset));
+ }
+}
+
+/**
+ Read XHCI extended capability register.
+
+ @param Xhc The XHCI device.
+ @param Offset The offset of the extended capability register.
+
+ @return The register content read
+
+**/
+UINT32
+XhcReadExtCapReg (
+ IN USB_XHCI_DEV *Xhc,
+ IN UINT32 Offset
+ )
+{
+ UINT32 Data;
+ EFI_STATUS Status;
+
+ ASSERT (Xhc->ExtCapRegBase != 0);
+
+ Status = Xhc->PciIo->Mem.Read (
+ Xhc->PciIo,
+ EfiPciIoWidthUint32,
+ XHC_BAR_INDEX,
+ (UINT64) (Xhc->ExtCapRegBase + Offset),
+ 1,
+ &Data
+ );
+
+ if (EFI_ERROR (Status)) {
+ DEBUG ((EFI_D_ERROR, "XhcReadExtCapReg: Pci Io Read error - %r at %d\n", Status, Offset));
+ Data = 0xFFFFFFFF;
+ }
+
+ return Data;
+}
+
+/**
+ Write the data to the XHCI extended capability register.
+
+ @param Xhc The XHCI device.
+ @param Offset The offset of the extended capability register.
+ @param Data The data to write.
+
+**/
+VOID
+XhcWriteExtCapReg (
+ IN USB_XHCI_DEV *Xhc,
+ IN UINT32 Offset,
+ IN UINT32 Data
+ )
+{
+ EFI_STATUS Status;
+
+ ASSERT (Xhc->ExtCapRegBase != 0);
+
+ Status = Xhc->PciIo->Mem.Write (
+ Xhc->PciIo,
+ EfiPciIoWidthUint32,
+ XHC_BAR_INDEX,
+ (UINT64) (Xhc->ExtCapRegBase + Offset),
+ 1,
+ &Data
+ );
+
+ if (EFI_ERROR (Status)) {
+ DEBUG ((EFI_D_ERROR, "XhcWriteExtCapReg: Pci Io Write error: %r at %d\n", Status, Offset));
+ }
+}
+
+
+/**
+ Set one bit of the runtime register while keeping other bits.
+
+ @param Xhc The XHCI device.
+ @param Offset The offset of the runtime register.
+ @param Bit The bit mask of the register to set.
+
+**/
+VOID
+XhcSetRuntimeRegBit (
+ IN USB_XHCI_DEV *Xhc,
+ IN UINT32 Offset,
+ IN UINT32 Bit
+ )
+{
+ UINT32 Data;
+
+ Data = XhcReadRuntimeReg (Xhc, Offset);
+ Data |= Bit;
+ XhcWriteRuntimeReg (Xhc, Offset, Data);
+}
+
+/**
+ Clear one bit of the runtime register while keeping other bits.
+
+ @param Xhc The XHCI device.
+ @param Offset The offset of the runtime register.
+ @param Bit The bit mask of the register to set.
+
+**/
+VOID
+XhcClearRuntimeRegBit (
+ IN USB_XHCI_DEV *Xhc,
+ IN UINT32 Offset,
+ IN UINT32 Bit
+ )
+{
+ UINT32 Data;
+
+ Data = XhcReadRuntimeReg (Xhc, Offset);
+ Data &= ~Bit;
+ XhcWriteRuntimeReg (Xhc, Offset, Data);
+}
+
+/**
+ Set one bit of the operational register while keeping other bits.
+
+ @param Xhc The XHCI device.
+ @param Offset The offset of the operational register.
+ @param Bit The bit mask of the register to set.
+
+**/
+VOID
+XhcSetOpRegBit (
+ IN USB_XHCI_DEV *Xhc,
+ IN UINT32 Offset,
+ IN UINT32 Bit
+ )
+{
+ UINT32 Data;
+
+ Data = XhcReadOpReg (Xhc, Offset);
+ Data |= Bit;
+ XhcWriteOpReg (Xhc, Offset, Data);
+}
+
+
+/**
+ Clear one bit of the operational register while keeping other bits.
+
+ @param Xhc The XHCI device.
+ @param Offset The offset of the operational register.
+ @param Bit The bit mask of the register to clear.
+
+**/
+VOID
+XhcClearOpRegBit (
+ IN USB_XHCI_DEV *Xhc,
+ IN UINT32 Offset,
+ IN UINT32 Bit
+ )
+{
+ UINT32 Data;
+
+ Data = XhcReadOpReg (Xhc, Offset);
+ Data &= ~Bit;
+ XhcWriteOpReg (Xhc, Offset, Data);
+}
+
+/**
+ Wait the operation register's bit as specified by Bit
+ to become set (or clear).
+
+ @param Xhc The XHCI device.
+ @param Offset The offset of the operation register.
+ @param Bit The bit of the register to wait for.
+ @param WaitToSet Wait the bit to set or clear.
+ @param Timeout The time to wait before abort (in millisecond, ms).
+
+ @retval EFI_SUCCESS The bit successfully changed by host controller.
+ @retval EFI_TIMEOUT The time out occurred.
+
+**/
+EFI_STATUS
+XhcWaitOpRegBit (
+ IN USB_XHCI_DEV *Xhc,
+ IN UINT32 Offset,
+ IN UINT32 Bit,
+ IN BOOLEAN WaitToSet,
+ IN UINT32 Timeout
+ )
+{
+ UINT32 Index;
+
+ for (Index = 0; Index < Timeout / XHC_SYNC_POLL_INTERVAL + 1; Index++) {
+ if (XHC_REG_BIT_IS_SET (Xhc, Offset, Bit) == WaitToSet) {
+ return EFI_SUCCESS;
+ }
+
+ gBS->Stall (XHC_SYNC_POLL_INTERVAL);
+ }
+
+ return EFI_TIMEOUT;
+}
+
+/**
+ Set Bios Ownership
+
+ @param Xhc The XHCI device.
+
+**/
+VOID
+XhcSetBiosOwnership (
+ IN USB_XHCI_DEV *Xhc
+ )
+{
+ UINT32 Buffer;
+
+ DEBUG ((EFI_D_INFO, "XhcSetBiosOwnership: called to set BIOS ownership\n"));
+
+ Buffer = XhcReadExtCapReg (Xhc, Xhc->UsbLegSupOffset);
+ Buffer = ((Buffer & (~USBLEGSP_OS_SEMAPHORE)) | USBLEGSP_BIOS_SEMAPHORE);
+ XhcWriteExtCapReg (Xhc, Xhc->UsbLegSupOffset, Buffer);
+}
+
+/**
+ Clear Bios Ownership
+
+ @param Xhc The XHCI device.
+
+**/
+VOID
+XhcClearBiosOwnership (
+ IN USB_XHCI_DEV *Xhc
+ )
+{
+ UINT32 Buffer;
+
+ DEBUG ((EFI_D_INFO, "XhcClearBiosOwnership: called to clear BIOS ownership\n"));
+
+ Buffer = XhcReadExtCapReg (Xhc, Xhc->UsbLegSupOffset);
+ Buffer = ((Buffer & (~USBLEGSP_BIOS_SEMAPHORE)) | USBLEGSP_OS_SEMAPHORE);
+ XhcWriteExtCapReg (Xhc, Xhc->UsbLegSupOffset, Buffer);
+}
+
+/**
+ Calculate the XHCI legacy support capability register offset.
+
+ @param Xhc The XHCI device.
+
+ @return The offset of XHCI legacy support capability register.
+
+**/
+UINT32
+XhcGetLegSupCapAddr (
+ IN USB_XHCI_DEV *Xhc
+ )
+{
+ UINT32 ExtCapOffset;
+ UINT8 NextExtCapReg;
+ UINT32 Data;
+
+ ExtCapOffset = 0;
+
+ do {
+ //
+ // Check if the extended capability register's capability id is USB Legacy Support.
+ //
+ Data = XhcReadExtCapReg (Xhc, ExtCapOffset);
+ if ((Data & 0xFF) == 0x1) {
+ return ExtCapOffset;
+ }
+ //
+ // If not, then traverse all of the ext capability registers till finding out it.
+ //
+ NextExtCapReg = (Data >> 8) & 0xFF;
+ ExtCapOffset += (NextExtCapReg << 2);
+ } while (NextExtCapReg != 0);
+
+ return 0;
+}
+
+/**
+ Whether the XHCI host controller is halted.
+
+ @param Xhc The XHCI device.
+
+ @retval TRUE The controller is halted.
+ @retval FALSE It isn't halted.
+
+**/
+BOOLEAN
+XhcIsHalt (
+ IN USB_XHCI_DEV *Xhc
+ )
+{
+ return XHC_REG_BIT_IS_SET (Xhc, XHC_USBSTS_OFFSET, XHC_USBSTS_HALT);
+}
+
+
+/**
+ Whether system error occurred.
+
+ @param Xhc The XHCI device.
+
+ @retval TRUE System error happened.
+ @retval FALSE No system error.
+
+**/
+BOOLEAN
+XhcIsSysError (
+ IN USB_XHCI_DEV *Xhc
+ )
+{
+ return XHC_REG_BIT_IS_SET (Xhc, XHC_USBSTS_OFFSET, XHC_USBSTS_HSE);
+}
+
+/**
+ Reset the XHCI host controller.
+
+ @param Xhc The XHCI device.
+ @param Timeout Time to wait before abort (in millisecond, ms).
+
+ @retval EFI_SUCCESS The XHCI host controller is reset.
+ @return Others Failed to reset the XHCI before Timeout.
+
+**/
+EFI_STATUS
+XhcResetHC (
+ IN USB_XHCI_DEV *Xhc,
+ IN UINT32 Timeout
+ )
+{
+ EFI_STATUS Status;
+
+ DEBUG ((EFI_D_INFO, "XhcResetHC!\n"));
+ //
+ // Host can only be reset when it is halt. If not so, halt it
+ //
+ if (!XHC_REG_BIT_IS_SET (Xhc, XHC_USBSTS_OFFSET, XHC_USBSTS_HALT)) {
+ Status = XhcHaltHC (Xhc, Timeout);
+
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+ }
+
+ XhcSetOpRegBit (Xhc, XHC_USBCMD_OFFSET, XHC_USBCMD_RESET);
+ Status = XhcWaitOpRegBit (Xhc, XHC_USBCMD_OFFSET, XHC_USBCMD_RESET, FALSE, Timeout);
+ return Status;
+}
+
+
+/**
+ Halt the XHCI host controller.
+
+ @param Xhc The XHCI device.
+ @param Timeout Time to wait before abort (in millisecond, ms).
+
+ @return EFI_SUCCESS The XHCI host controller is halt.
+ @return EFI_TIMEOUT Failed to halt the XHCI before Timeout.
+
+**/
+EFI_STATUS
+XhcHaltHC (
+ IN USB_XHCI_DEV *Xhc,
+ IN UINT32 Timeout
+ )
+{
+ EFI_STATUS Status;
+
+ XhcClearOpRegBit (Xhc, XHC_USBCMD_OFFSET, XHC_USBCMD_RUN);
+ Status = XhcWaitOpRegBit (Xhc, XHC_USBSTS_OFFSET, XHC_USBSTS_HALT, TRUE, Timeout);
+ return Status;
+}
+
+
+/**
+ Set the XHCI host controller to run.
+
+ @param Xhc The XHCI device.
+ @param Timeout Time to wait before abort (in millisecond, ms).
+
+ @return EFI_SUCCESS The XHCI host controller is running.
+ @return EFI_TIMEOUT Failed to set the XHCI to run before Timeout.
+
+**/
+EFI_STATUS
+XhcRunHC (
+ IN USB_XHCI_DEV *Xhc,
+ IN UINT32 Timeout
+ )
+{
+ EFI_STATUS Status;
+
+ XhcSetOpRegBit (Xhc, XHC_USBCMD_OFFSET, XHC_USBCMD_RUN);
+ Status = XhcWaitOpRegBit (Xhc, XHC_USBSTS_OFFSET, XHC_USBSTS_HALT, FALSE, Timeout);
+ return Status;
+}
+
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