+++ /dev/null
-/** @file
- Serial I/O Port library functions with no library constructor/destructor
-
- Copyright (c) 2006 - 2017, Intel Corporation. All rights reserved.<BR>
- \r
- SPDX-License-Identifier: BSD-2-Clause-Patent
-
-**/
-
-#include "PlatformSerialPortLib.h"
-
-UINT16 gComBase = 0x3f8;
-UINTN gBps = 115200;
-UINT8 gData = 8;
-UINT8 gStop = 1;
-UINT8 gParity = 0;
-UINT8 gBreakSet = 0;
-
-/**
- Initialize Serial Port
-
- The Baud Rate Divisor registers are programmed and the LCR
- is used to configure the communications format. Hard coded
- UART config comes from globals in DebugSerialPlatform lib.
-
- @param None
-
- @retval None
-
-**/
-RETURN_STATUS
-EFIAPI
-UARTInitialize (
- VOID
- )
-{
- UINTN Divisor;
- UINT8 OutputData;
- UINT8 Data;
-
- //
- // Map 5..8 to 0..3
- //
- Data = (UINT8) (gData - (UINT8) 5);
-
- //
- // Calculate divisor for baud generator
- //
- Divisor = 115200 / gBps;
-
- //
- // Set communications format
- //
- OutputData = (UINT8) ((DLAB << 7) | ((gBreakSet << 6) | ((gParity << 3) | ((gStop << 2) | Data))));
- IoWrite8 (gComBase + LCR_OFFSET, OutputData);
-
- //
- // Configure baud rate
- //
- IoWrite8 (gComBase + BAUD_HIGH_OFFSET, (UINT8) (Divisor >> 8));
- IoWrite8 (gComBase + BAUD_LOW_OFFSET, (UINT8) (Divisor & 0xff));
-
- //
- // Switch back to bank 0
- //
- OutputData = (UINT8) ((~DLAB << 7) | ((gBreakSet << 6) | ((gParity << 3) | ((gStop << 2) | Data))));
- IoWrite8 (gComBase + LCR_OFFSET, OutputData);
-
- return RETURN_SUCCESS;
-}
-
-/**
- Common function to initialize UART Serial device and USB Serial device.
-
- @param None
-
- @retval None
-
-**/
-RETURN_STATUS
-EFIAPI
-SerialPortInitialize (
- VOID
- )
-{
-
- UARTInitialize ();
-
-
- return RETURN_SUCCESS;
-}
-
-/**
- Write data to serial device.
-
- If the buffer is NULL, then return 0;
- if NumberOfBytes is zero, then return 0.
-
- @param Buffer Point of data buffer which need to be writed.
- @param NumberOfBytes Number of output bytes which are cached in Buffer.
-
- @retval 0 Write data failed.
- @retval !0 Actual number of bytes writed to serial device.
-
-**/
-UINTN
-EFIAPI
-UARTDbgOut (
- IN UINT8 *Buffer,
- IN UINTN NumberOfBytes
-)
-{
- UINTN Result;
- UINT8 Data;
-
- if (NULL == Buffer) {
- return 0;
- }
-
- Result = NumberOfBytes;
-
- while (NumberOfBytes--) {
- //
- // Wait for the serial port to be ready.
- //
- do {
- Data = IoRead8 ((UINT16) PcdGet64 (PcdSerialRegisterBase) + LSR_OFFSET);
- } while ((Data & LSR_TXRDY) == 0);
- IoWrite8 ((UINT16) PcdGet64 (PcdSerialRegisterBase), *Buffer++);
- }
-
- return Result;
-}
-
-/**
- Common function to write data to UART Serial device and USB Serial device.
-
- @param Buffer Point of data buffer which need to be writed.
- @param NumberOfBytes Number of output bytes which are cached in Buffer.
-
-**/
-UINTN
-EFIAPI
-SerialPortWrite (
- IN UINT8 *Buffer,
- IN UINTN NumberOfBytes
-)
-{
- if (FeaturePcdGet (PcdStatusCodeUseIsaSerial)) {
- UARTDbgOut (Buffer, NumberOfBytes);
- }
-
- return RETURN_SUCCESS;
-}
-
-/**
- Read data from serial device and save the datas in buffer.
-
- If the buffer is NULL, then return 0;
- if NumberOfBytes is zero, then return 0.
-
- @param Buffer Point of data buffer which need to be writed.
- @param NumberOfBytes Number of output bytes which are cached in Buffer.
-
- @retval 0 Read data failed.
- @retval !0 Actual number of bytes raed to serial device.
-
-**/
-UINTN
-EFIAPI
-UARTDbgIn (
- OUT UINT8 *Buffer,
- IN UINTN NumberOfBytes
-)
-{
- UINTN Result;
- UINT8 Data;
-
- if (NULL == Buffer) {
- return 0;
- }
-
- Result = NumberOfBytes;
-
- while (NumberOfBytes--) {
- //
- // Wait for the serial port to be ready.
- //
- do {
- Data = IoRead8 ((UINT16) PcdGet64 (PcdSerialRegisterBase) + LSR_OFFSET);
- } while ((Data & LSR_RXDA) == 0);
-
- *Buffer++ = IoRead8 ((UINT16) PcdGet64 (PcdSerialRegisterBase));
- }
-
- return Result;
-}
-
-/**
- Common function to Read data from UART serial device, USB serial device and save the datas in buffer.
-
- @param Buffer Point of data buffer which need to be writed.
- @param NumberOfBytes Number of output bytes which are cached in Buffer.
-
-**/
-UINTN
-EFIAPI
-SerialPortRead (
- OUT UINT8 *Buffer,
- IN UINTN NumberOfBytes
-)
-{
- if (FeaturePcdGet (PcdStatusCodeUseIsaSerial)) {
- UARTDbgIn (Buffer, NumberOfBytes);
- }
-
- return RETURN_SUCCESS;
-}
-
-
-/**
- Polls a serial device to see if there is any data waiting to be read.
-
- Polls aserial 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
- )
-{
- UINT8 Data;
-
- //
- // Read the serial port status.
- //
- Data = IoRead8 ((UINT16) PcdGet64 (PcdSerialRegisterBase) + LSR_OFFSET);
-
- return (BOOLEAN) ((Data & LSR_RXDA) != 0);
-}