127 lines
3.7 KiB
C
127 lines
3.7 KiB
C
/** @file
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Implementation of BaseSerialIoUartDebugHelperLib.
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@copyright
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INTEL CONFIDENTIAL
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Copyright 2019 Intel Corporation.
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The source code contained or described herein and all documents related to the
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source code ("Material") are owned by Intel Corporation or its suppliers or
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licensors. Title to the Material remains with Intel Corporation or its suppliers
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and licensors. The Material may contain trade secrets and proprietary and
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confidential information of Intel Corporation and its suppliers and licensors,
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and is protected by worldwide copyright and trade secret laws and treaty
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provisions. No part of the Material may be used, copied, reproduced, modified,
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published, uploaded, posted, transmitted, distributed, or disclosed in any way
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without Intel's prior express written permission.
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No license under any patent, copyright, trade secret or other intellectual
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property right is granted to or conferred upon you by disclosure or delivery
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of the Materials, either expressly, by implication, inducement, estoppel or
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otherwise. Any license under such intellectual property rights must be
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express and approved by Intel in writing.
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Unless otherwise agreed by Intel in writing, you may not remove or alter
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this notice or any other notice embedded in Materials by Intel or
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Intel's suppliers or licensors in any way.
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This file contains a 'Sample Driver' and is licensed as such under the terms
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of your license agreement with Intel or your vendor. This file may be modified
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by the user, subject to the additional terms of the license agreement.
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@par Specification Reference:
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**/
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#include <Base.h>
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#include <Uefi/UefiBaseType.h>
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#include <Library/SerialIoAccessLib.h>
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#include <Library/SerialIoUartLib.h>
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#include <Library/SerialIoUartDebugPropertyLib.h>
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/**
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Initialize SerialIo UART for debug.
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**/
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VOID
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EFIAPI
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SerialIoUartDebugInit (
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VOID
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)
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{
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UINT64 PciCfgBase;
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UINT64 Bar0;
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SERIAL_IO_UART_ATTRIBUTES UartAttributes;
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UINT8 UartNumber;
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EFI_STATUS Status;
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UartNumber = SerialIoUartDebugGetControllerNumber ();
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PciCfgBase = GetSerialIoUartPciCfg (UartNumber);
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Bar0 = GetSerialIoBar (PciCfgBase);
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SerialIoUartDebugGetAttributes (&UartAttributes);
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//
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// Check BAR0 whether is assigned value in either Hidden or PCI Mode.
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//
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if ((Bar0 != 0x0) && (Bar0 != 0xFFFFF000)) {
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SerialIoUartSetAttributes (
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UartNumber,
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UartAttributes.BaudRate,
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UartAttributes.Parity,
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UartAttributes.DataBits,
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UartAttributes.StopBits,
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UartAttributes.AutoFlow
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);
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return;
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}
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//
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// Assign MMIO for HS-UART used in PCI Mode.
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//
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if (!IsSerialIoUartInPciMode (UartNumber)) {
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return;
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}
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Bar0 = SerialIoUartDebugGetPciDefaultMmioBase ();
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Status = SerialIoUartSetMmioInPciMode (UartNumber, Bar0);
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if (Status == EFI_UNSUPPORTED) {
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return;
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}
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//
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// UART Reset
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//
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SerialIoUartGetOutOfReset (Bar0);
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//
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// Initialize UART Attributes
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//
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SerialIoUartSetAttributes (
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UartNumber,
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UartAttributes.BaudRate,
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UartAttributes.Parity,
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UartAttributes.DataBits,
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UartAttributes.StopBits,
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UartAttributes.AutoFlow
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);
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}
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/**
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Write data to serial device.
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If the buffer is NULL, then return 0;
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if NumberOfBytes is zero, then return 0.
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@param[in] Buffer Data pointer
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@param[in] NumberOfBytes Number of output bytes which are cached in Buffer.
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@retval Actual number of bytes written to serial device.
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**/
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UINTN
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EFIAPI
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SerialIoUartDebugWrite (
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IN UINT8 *Buffer,
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IN UINTN NumberOfBytes
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)
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{
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return SerialIoUartWrite (SerialIoUartDebugGetControllerNumber (), Buffer, NumberOfBytes);
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}
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