/**
USB standard control transfer support routine. This
function is used by USB device. It is possible that
the device's interfaces are still waiting to be
enumerated.
@param UsbDev The usb device.
@param Direction The direction of data transfer.
@param Type Standard / class specific / vendor specific.
@param Target The receiving target.
@param Request Which request.
@param Value The wValue parameter of the request.
@param Index The wIndex parameter of the request.
@param Buf The buffer to receive data into / transmit from.
@param Length The length of the buffer.
@retval EFI_SUCCESS The control request is executed.
@retval EFI_DEVICE_ERROR Failed to execute the control transfer.
**/
EFI_STATUS
UsbCtrlRequest (
IN USB_DEVICE *UsbDev,
IN EFI_USB_DATA_DIRECTION Direction,
IN UINTN Type,
IN UINTN Target,
IN UINTN Request,
IN UINT16 Value,
IN UINT16 Index,
IN OUT VOID *Buf,
IN UINTN Length
)
{
EFI_USB_DEVICE_REQUEST DevReq;
EFI_STATUS Status;
UINT32 Result;
UINTN Len;
// ASSERT ((UsbDev != NULL) && (UsbDev->Bus != NULL));
if (!UsbDev || !(UsbDev->Bus)) {
return EFI_DEVICE_ERROR;
}
DevReq.RequestType = USB_REQUEST_TYPE (Direction, Type, Target);
DevReq.Request = (UINT8) Request;
DevReq.Value = Value;
DevReq.Index = Index;
DevReq.Length = (UINT16) Length;
Len = Length;
Status = UsbHcControlTransfer (
UsbDev->Bus,
UsbDev->Address,
UsbDev->Speed,
UsbDev->MaxPacket0,
&DevReq,
Direction,
Buf,
&Len,
USB_GENERAL_DEVICE_REQUEST_TIMEOUT,
&UsbDev->Translator,
&Result
);
return Status;
}
/**
USB_IO function to execute a control transfer. This
function will execute the USB transfer. If transfer
successes, it will sync the internal state of USB bus
with device state.
@param This The USB_IO instance
@param Request The control transfer request
@param Direction Direction for data stage
@param Timeout The time to wait before timeout
@param Data The buffer holding the data
@param DataLength Then length of the data
@param UsbStatus USB result
@retval EFI_INVALID_PARAMETER The parameters are invalid
@retval EFI_SUCCESS The control transfer succeeded.
@retval Others Failed to execute the transfer
**/
EFI_STATUS
EFIAPI
UsbIoControlTransfer (
IN EFI_USB_IO_PROTOCOL *This,
IN EFI_USB_DEVICE_REQUEST *Request,
IN EFI_USB_DATA_DIRECTION Direction,
IN UINT32 Timeout,
IN OUT VOID *Data, OPTIONAL
IN UINTN DataLength, OPTIONAL
OUT UINT32 *UsbStatus
)
{
USB_DEVICE *Dev;
USB_INTERFACE *UsbIf;
USB_ENDPOINT_DESC *EpDesc;
EFI_TPL OldTpl;
EFI_STATUS Status;
if (UsbStatus == NULL) {
return EFI_INVALID_PARAMETER;
}
OldTpl = gBS->RaiseTPL (USB_BUS_TPL);
UsbIf = USB_INTERFACE_FROM_USBIO (This);
Dev = UsbIf->Device;
Status = UsbHcControlTransfer (
Dev->Bus,
Dev->Address,
Dev->Speed,
Dev->MaxPacket0,
Request,
Direction,
Data,
&DataLength,
(UINTN) Timeout,
&Dev->Translator,
UsbStatus
);
if (EFI_ERROR (Status) || (*UsbStatus != EFI_USB_NOERROR)) {
//
// Clear TT buffer when CTRL/BULK split transaction failes
// Clear the TRANSLATOR TT buffer, not parent's buffer
//
ASSERT (Dev->Translator.TranslatorHubAddress < Dev->Bus->MaxDevices);
if (Dev->Translator.TranslatorHubAddress != 0) {
UsbHubCtrlClearTTBuffer (
Dev->Bus->Devices[Dev->Translator.TranslatorHubAddress],
Dev->Translator.TranslatorPortNumber,
Dev->Address,
0,
USB_ENDPOINT_CONTROL
);
}
goto ON_EXIT;
}
//
// Some control transfer will change the device's internal
// status, such as Set_Configuration and Set_Interface.
// We must synchronize the bus driver's status with that in
// device. We ignore the Set_Descriptor request because it's
// hardly used by any device, especially in pre-boot environment
//
//
// Reset the endpoint toggle when endpoint stall is cleared
//
if ((Request->Request == USB_REQ_CLEAR_FEATURE) &&
(Request->RequestType == USB_REQUEST_TYPE (EfiUsbNoData, USB_REQ_TYPE_STANDARD,
USB_TARGET_ENDPOINT)) &&
(Request->Value == USB_FEATURE_ENDPOINT_HALT)) {
EpDesc = UsbGetEndpointDesc (UsbIf, (UINT8) Request->Index);
if (EpDesc != NULL) {
EpDesc->Toggle = 0;
}
}
//
// Select a new configuration. This is a dangerous action. Upper driver
// should stop use its current UsbIo after calling this driver. The old
// UsbIo will be uninstalled and new UsbIo be installed. We can't use
// ReinstallProtocol since interfaces in different configuration may be
// completely irrelevant.
//
if ((Request->Request == USB_REQ_SET_CONFIG) &&
(Request->RequestType == USB_REQUEST_TYPE (EfiUsbNoData, USB_REQ_TYPE_STANDARD,
USB_TARGET_DEVICE))) {
//
// Don't re-create the USB interfaces if configuration isn't changed.
//
if ((Dev->ActiveConfig != NULL) &&
(Request->Value == Dev->ActiveConfig->Desc.ConfigurationValue)) {
goto ON_EXIT;
}
DEBUG ((EFI_D_INFO, "UsbIoControlTransfer: configure changed!!! Do NOT use old UsbIo!!!\n"));
if (Dev->ActiveConfig != NULL) {
UsbRemoveConfig (Dev);
}
if (Request->Value != 0) {
Status = UsbSelectConfig (Dev, (UINT8) Request->Value);
}
//
// Exit now, Old USB_IO is invalid now
//
goto ON_EXIT;
}
//
// A new alternative setting is selected for the interface.
// No need to reinstall UsbIo in this case because only
// underlying communication endpoints are changed. Functionality
// should remains the same.
//
if ((Request->Request == USB_REQ_SET_INTERFACE) &&
(Request->RequestType == USB_REQUEST_TYPE (EfiUsbNoData, USB_REQ_TYPE_STANDARD,
USB_TARGET_INTERFACE)) &&
(Request->Index == UsbIf->IfSetting->Desc.InterfaceNumber)) {
Status = UsbSelectSetting (UsbIf->IfDesc, (UINT8) Request->Value);
if (!EFI_ERROR (Status)) {
ASSERT (UsbIf->IfDesc->ActiveIndex < USB_MAX_INTERFACE_SETTING);
UsbIf->IfSetting = UsbIf->IfDesc->Settings[UsbIf->IfDesc->ActiveIndex];
}
}
ON_EXIT:
gBS->RestoreTPL (OldTpl);
return Status;
}
