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- /** @file
- Serial Port Lib that thunks back to Emulator services to write to StdErr.
- All read functions are stubed out.
- Copyright (c) 2006 - 2015, Intel Corporation. All rights reserved.<BR>
- Portions copyright (c) 2011, Apple Inc. All rights reserved.<BR>
- SPDX-License-Identifier: BSD-2-Clause-Patent
- **/
- #include <PiDxe.h>
- #include <Library/SerialPortLib.h>
- #include <Library/EmuThunkLib.h>
- /**
- Initialize the serial device hardware.
- If no initialization is required, then return RETURN_SUCCESS.
- If the serial device was successfully initialized, then return RETURN_SUCCESS.
- If the serial device could not be initialized, then return RETURN_DEVICE_ERROR.
- @retval RETURN_SUCCESS The serial device was initialized.
- @retval RETURN_DEVICE_ERROR The serial device could not be initialized.
- **/
- RETURN_STATUS
- EFIAPI
- SerialPortInitialize (
- VOID
- )
- {
- return gEmuThunk->ConfigStdIn ();
- }
- /**
- Write data from buffer to serial device.
- Writes NumberOfBytes data bytes from Buffer to the serial device.
- The number of bytes actually written to the serial device is returned.
- If the return value is less than NumberOfBytes, then the write operation failed.
- If Buffer is NULL, then ASSERT().
- If NumberOfBytes is zero, then return 0.
- @param Buffer The pointer to the data buffer to be written.
- @param NumberOfBytes The number of bytes to written to the serial device.
- @retval 0 NumberOfBytes is 0.
- @retval >0 The number of bytes written to the serial device.
- If this value is less than NumberOfBytes, then the read operation failed.
- **/
- UINTN
- EFIAPI
- SerialPortWrite (
- IN UINT8 *Buffer,
- IN UINTN NumberOfBytes
- )
- {
- return gEmuThunk->WriteStdOut (Buffer, NumberOfBytes);
- }
- /**
- Read data from serial device and save the datas in buffer.
- Reads NumberOfBytes data bytes from a serial device into the buffer
- specified by Buffer. The number of bytes actually read is returned.
- If the return value is less than NumberOfBytes, then the rest operation failed.
- If Buffer is NULL, then ASSERT().
- If NumberOfBytes is zero, then return 0.
- @param Buffer The pointer to the data buffer to store the data read from the serial device.
- @param NumberOfBytes The number of bytes which will be read.
- @retval 0 Read data failed; No data is to be read.
- @retval >0 The actual number of bytes read from serial device.
- **/
- UINTN
- EFIAPI
- SerialPortRead (
- OUT UINT8 *Buffer,
- IN UINTN NumberOfBytes
- )
- {
- return gEmuThunk->ReadStdIn (Buffer, NumberOfBytes);
- }
- /**
- Polls a serial device to see if there is any data waiting to be read.
- Polls a serial device to see if there is any data waiting to be read.
- If there is data waiting to be read from the serial device, then TRUE is returned.
- If there is no data waiting to be read from the serial device, then FALSE is returned.
- @retval TRUE Data is waiting to be read from the serial device.
- @retval FALSE There is no data waiting to be read from the serial device.
- **/
- BOOLEAN
- EFIAPI
- SerialPortPoll (
- VOID
- )
- {
- return gEmuThunk->PollStdIn ();
- }
- /**
- Sets the control bits on a serial device.
- @param Control Sets the bits of Control that are settable.
- @retval RETURN_SUCCESS The new control bits were set on the serial device.
- @retval RETURN_UNSUPPORTED The serial device does not support this operation.
- @retval RETURN_DEVICE_ERROR The serial device is not functioning correctly.
- **/
- RETURN_STATUS
- EFIAPI
- SerialPortSetControl (
- IN UINT32 Control
- )
- {
- return RETURN_UNSUPPORTED;
- }
- /**
- Retrieve the status of the control bits on a serial device.
- @param Control A pointer to return the current control signals from the serial device.
- @retval RETURN_SUCCESS The control bits were read from the serial device.
- @retval RETURN_UNSUPPORTED The serial device does not support this operation.
- @retval RETURN_DEVICE_ERROR The serial device is not functioning correctly.
- **/
- RETURN_STATUS
- EFIAPI
- SerialPortGetControl (
- OUT UINT32 *Control
- )
- {
- *Control = 0;
- if (!SerialPortPoll ()) {
- *Control = EFI_SERIAL_INPUT_BUFFER_EMPTY;
- }
- return RETURN_SUCCESS;
- }
- /**
- Sets the baud rate, receive FIFO depth, transmit/receice time out, parity,
- data bits, and stop bits on a serial device.
- @param BaudRate The requested baud rate. A BaudRate value of 0 will use the
- device's default interface speed.
- On output, the value actually set.
- @param ReveiveFifoDepth The requested depth of the FIFO on the receive side of the
- serial interface. A ReceiveFifoDepth value of 0 will use
- the device's default FIFO depth.
- On output, the value actually set.
- @param Timeout The requested time out for a single character in microseconds.
- This timeout applies to both the transmit and receive side of the
- interface. A Timeout value of 0 will use the device's default time
- out value.
- On output, the value actually set.
- @param Parity The type of parity to use on this serial device. A Parity value of
- DefaultParity will use the device's default parity value.
- On output, the value actually set.
- @param DataBits The number of data bits to use on the serial device. A DataBits
- vaule of 0 will use the device's default data bit setting.
- On output, the value actually set.
- @param StopBits The number of stop bits to use on this serial device. A StopBits
- value of DefaultStopBits will use the device's default number of
- stop bits.
- On output, the value actually set.
- @retval RETURN_SUCCESS The new attributes were set on the serial device.
- @retval RETURN_UNSUPPORTED The serial device does not support this operation.
- @retval RETURN_INVALID_PARAMETER One or more of the attributes has an unsupported value.
- @retval RETURN_DEVICE_ERROR The serial device is not functioning correctly.
- **/
- RETURN_STATUS
- EFIAPI
- SerialPortSetAttributes (
- IN OUT UINT64 *BaudRate,
- IN OUT UINT32 *ReceiveFifoDepth,
- IN OUT UINT32 *Timeout,
- IN OUT EFI_PARITY_TYPE *Parity,
- IN OUT UINT8 *DataBits,
- IN OUT EFI_STOP_BITS_TYPE *StopBits
- )
- {
- return RETURN_UNSUPPORTED;
- }
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