Functions
EFI_STATUS	EhcInitSched (IN USB2_HC_DEV *Ehc)

VOID	EhcFreeSched (IN USB2_HC_DEV *Ehc)

VOID	EhcLinkQhToAsync (IN USB2_HC_DEV Ehc, IN EHC_QH Qh)

VOID	EhcUnlinkQhFromAsync (IN USB2_HC_DEV Ehc, IN EHC_QH Qh)

VOID	EhcLinkQhToPeriod (IN USB2_HC_DEV Ehc, IN EHC_QH Qh)

VOID	EhcUnlinkQhFromPeriod (IN USB2_HC_DEV Ehc, IN EHC_QH Qh)

EFI_STATUS	EhcExecTransfer (IN USB2_HC_DEV Ehc, IN URB Urb, IN UINTN TimeOut)

EFI_STATUS	EhciDelAsyncIntTransfer (IN USB2_HC_DEV Ehc, IN UINT8 DevAddr, IN UINT8 EpNum, OUT UINT8 DataToggle)

VOID	EhciDelAllAsyncIntTransfers (IN USB2_HC_DEV *Ehc)

URB *	EhciInsertAsyncIntTransfer (IN USB2_HC_DEV Ehc, IN UINT8 DevAddr, IN UINT8 EpAddr, IN UINT8 DevSpeed, IN UINT8 Toggle, IN UINTN MaxPacket, IN EFI_USB2_HC_TRANSACTION_TRANSLATOR Hub, IN UINTN DataLen, IN EFI_ASYNC_USB_TRANSFER_CALLBACK Callback, IN VOID *Context, IN UINTN Interval)

VOID EFIAPI	EhcMonitorAsyncRequests (IN EFI_EVENT Event, IN VOID *Context)

Detailed Description

This file contains the definination for host controller schedule routines.

Copyright (c) 2007 - 2018, Intel Corporation. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent

Definition in file EhciSched.h.

Function Documentation

◆ EhcExecTransfer()

EFI_STATUS EhcExecTransfer	(	IN USB2_HC_DEV *	Ehc,
		IN URB *	Urb,
		IN UINTN	TimeOut
	)

Execute the transfer by polling the URB. This is a synchronous operation.

Parameters

Ehc	The EHCI device.
Urb	The URB to execute.
TimeOut	The time to wait before abort, in millisecond.

Return values

EFI_DEVICE_ERROR	The transfer failed due to transfer error.
EFI_TIMEOUT	The transfer failed due to time out.
EFI_SUCCESS	The transfer finished OK.

Execute the transfer by polling the URB. This is a synchronous operation.

Parameters

Ehc	The EHCI device.
Urb	The URB to execute.
TimeOut	The time to wait before abort, in millisecond.

Returns: EFI_DEVICE_ERROR The transfer failed due to transfer error.; EFI_TIMEOUT The transfer failed due to time out.; EFI_SUCCESS The transfer finished OK.

Definition at line 668 of file EhciSched.c.

◆ EhcFreeSched()

VOID EhcFreeSched ( IN USB2_HC_DEV * Ehc )

Free the schedule data. It may be partially initialized.

Parameters

Ehc	The EHCI device.

Definition at line 250 of file EhciSched.c.

◆ EhciDelAllAsyncIntTransfers()

VOID EhciDelAllAsyncIntTransfers ( IN USB2_HC_DEV * Ehc )

Remove all the asynchronous interrutp transfers.

Parameters

Ehc	The EHCI device.

Definition at line 780 of file EhciSched.c.

◆ EhciDelAsyncIntTransfer()

EFI_STATUS EhciDelAsyncIntTransfer	(	IN USB2_HC_DEV *	Ehc,
		IN UINT8	DevAddr,
		IN UINT8	EpNum,
		OUT UINT8 *	DataToggle
	)

Delete a single asynchronous interrupt transfer for the device and endpoint.

Parameters

Ehc	The EHCI device.
DevAddr	The address of the target device.
EpNum	The endpoint of the target.
DataToggle	Return the next data toggle to use.

Return values

EFI_SUCCESS	An asynchronous transfer is removed.
EFI_NOT_FOUND	No transfer for the device is found.

Definition at line 733 of file EhciSched.c.

◆ EhciInsertAsyncIntTransfer()

URB * EhciInsertAsyncIntTransfer	(	IN USB2_HC_DEV *	Ehc,
		IN UINT8	DevAddr,
		IN UINT8	EpAddr,
		IN UINT8	DevSpeed,
		IN UINT8	Toggle,
		IN UINTN	MaxPacket,
		IN EFI_USB2_HC_TRANSACTION_TRANSLATOR *	Hub,
		IN UINTN	DataLen,
		IN EFI_ASYNC_USB_TRANSFER_CALLBACK	Callback,
		IN VOID *	Context,
		IN UINTN	Interval
	)

Insert a single asynchronous interrupt transfer for the device and endpoint.

Parameters

Ehc	The EHCI device.
DevAddr	The device address.
EpAddr	Endpoint addrress & its direction.
DevSpeed	The device speed.
Toggle	Initial data toggle to use.
MaxPacket	The max packet length of the endpoint.
Hub	The transaction translator to use.
DataLen	The length of data buffer.
Callback	The function to call when data is transferred.
Context	The context to the callback.
Interval	The interval for interrupt transfer.

Returns: Created URB or NULL.

Definition at line 819 of file EhciSched.c.

◆ EhcInitSched()

EFI_STATUS EhcInitSched ( IN USB2_HC_DEV * Ehc )

Initialize the schedule data structure such as frame list.

Parameters

Ehc	The EHCI device to init schedule data for.

Return values

EFI_OUT_OF_RESOURCES	Failed to allocate resource to init schedule data.
EFI_SUCCESS	The schedule data is initialized.

Initialize the schedule data structure such as frame list.

Parameters

Ehc	The EHCI device to init schedule data.

Return values

EFI_OUT_OF_RESOURCES	Failed to allocate resource to init schedule data.
EFI_SUCCESS	The schedule data is initialized.

Definition at line 102 of file EhciSched.c.

◆ EhcLinkQhToAsync()

VOID EhcLinkQhToAsync	(	IN USB2_HC_DEV *	Ehc,
		IN EHC_QH *	Qh
	)

Link the queue head to the asynchronous schedule list. UEFI only supports one CTRL/BULK transfer at a time due to its interfaces. This simplifies the AsynList management: A reclamation header is always linked to the AsyncListAddr, the only active QH is appended to it.

Parameters

Ehc	The EHCI device.
Qh	The queue head to link.

Definition at line 312 of file EhciSched.c.

◆ EhcLinkQhToPeriod()

VOID EhcLinkQhToPeriod	(	IN USB2_HC_DEV *	Ehc,
		IN EHC_QH *	Qh
	)

Link a queue head for interrupt transfer to the periodic schedule frame list. This code is very much the same as that in UHCI.

Parameters

Ehc	The EHCI device.
Qh	The queue head to link.

Definition at line 389 of file EhciSched.c.

◆ EhcMonitorAsyncRequests()

VOID EFIAPI EhcMonitorAsyncRequests	(	IN EFI_EVENT	Event,
		IN VOID *	Context
	)

Interrupt transfer periodic check handler.

Parameters

Event	Interrupt event.
Context	Pointer to USB2_HC_DEV.

Definition at line 1021 of file EhciSched.c.

◆ EhcUnlinkQhFromAsync()

VOID EhcUnlinkQhFromAsync	(	IN USB2_HC_DEV *	Ehc,
		IN EHC_QH *	Qh
	)

Unlink a queue head from the asynchronous schedule list. Need to synchronize with hardware.

Parameters

Ehc	The EHCI device.
Qh	The queue head to unlink.

Definition at line 345 of file EhciSched.c.

◆ EhcUnlinkQhFromPeriod()

VOID EhcUnlinkQhFromPeriod	(	IN USB2_HC_DEV *	Ehc,
		IN EHC_QH *	Qh
	)

Unlink an interrupt queue head from the periodic schedule frame list.

Parameters

Ehc	The EHCI device.
Qh	The queue head to unlink.

Definition at line 490 of file EhciSched.c.

Functions

Detailed Description

Function Documentation

◆ EhcExecTransfer()

◆ EhcFreeSched()

◆ EhciDelAllAsyncIntTransfers()

◆ EhciDelAsyncIntTransfer()

◆ EhciInsertAsyncIntTransfer()

◆ EhcInitSched()

◆ EhcLinkQhToAsync()

◆ EhcLinkQhToPeriod()

◆ EhcMonitorAsyncRequests()

◆ EhcUnlinkQhFromAsync()

◆ EhcUnlinkQhFromPeriod()