mirror of
https://github.com/CloverHackyColor/CloverBootloader.git
synced 2024-11-28 12:25:19 +01:00
563 lines
18 KiB
C
563 lines
18 KiB
C
/** @file
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Serial driver that layers on top of a Serial Port Library instance.
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Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
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Copyright (c) 2013-2014, ARM Ltd. All rights reserved.<BR>
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Copyright (c) 2015, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include <Library/UefiBootServicesTableLib.h>
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#include <Library/SerialPortLib.h>
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#include <Library/DebugLib.h>
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#include <Library/PcdLib.h>
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#include <Protocol/SerialIo.h>
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#include <Protocol/DevicePath.h>
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#include <Guid/SerialPortLibVendor.h>
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typedef struct {
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VENDOR_DEVICE_PATH Guid;
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UART_DEVICE_PATH Uart;
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EFI_DEVICE_PATH_PROTOCOL End;
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} SERIAL_DEVICE_PATH;
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/**
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Reset the serial device.
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@param This Protocol instance pointer.
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@retval EFI_SUCCESS The device was reset.
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@retval EFI_DEVICE_ERROR The serial device could not be reset.
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**/
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EFI_STATUS
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EFIAPI
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SerialReset (
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IN EFI_SERIAL_IO_PROTOCOL *This
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);
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/**
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Sets the baud rate, receive FIFO depth, transmit/receive time out, parity,
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data bits, and stop bits on a serial device.
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@param This Protocol instance pointer.
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@param BaudRate The requested baud rate. A BaudRate value of 0 will use the the
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device's default interface speed.
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@param ReceiveFifoDepth The requested depth of the FIFO on the receive side of the
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serial interface. A ReceiveFifoDepth value of 0 will use
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the device's default FIFO depth.
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@param Timeout The requested time out for a single character in microseconds.
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This timeout applies to both the transmit and receive side of the
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interface. A Timeout value of 0 will use the device's default time
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out value.
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@param Parity The type of parity to use on this serial device. A Parity value of
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DefaultParity will use the device's default parity value.
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@param DataBits The number of data bits to use on the serial device. A DataBits
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value of 0 will use the device's default data bit setting.
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@param StopBits The number of stop bits to use on this serial device. A StopBits
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value of DefaultStopBits will use the device's default number of
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stop bits.
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@retval EFI_SUCCESS The device was reset.
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@retval EFI_INVALID_PARAMETER One or more attributes has an unsupported value.
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@retval EFI_DEVICE_ERROR The serial device is not functioning correctly.
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**/
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EFI_STATUS
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EFIAPI
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SerialSetAttributes (
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IN EFI_SERIAL_IO_PROTOCOL *This,
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IN UINT64 BaudRate,
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IN UINT32 ReceiveFifoDepth,
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IN UINT32 Timeout,
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IN EFI_PARITY_TYPE Parity,
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IN UINT8 DataBits,
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IN EFI_STOP_BITS_TYPE StopBits
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);
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/**
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Set the control bits on a serial device
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@param This Protocol instance pointer.
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@param Control Set the bits of Control that are settable.
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@retval EFI_SUCCESS The new control bits were set on the serial device.
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@retval EFI_UNSUPPORTED The serial device does not support this operation.
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@retval EFI_DEVICE_ERROR The serial device is not functioning correctly.
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**/
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EFI_STATUS
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EFIAPI
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SerialSetControl (
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IN EFI_SERIAL_IO_PROTOCOL *This,
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IN UINT32 Control
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);
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/**
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Retrieves the status of the control bits on a serial device
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@param This Protocol instance pointer.
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@param Control A pointer to return the current Control signals from the serial device.
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@retval EFI_SUCCESS The control bits were read from the serial device.
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@retval EFI_DEVICE_ERROR The serial device is not functioning correctly.
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**/
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EFI_STATUS
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EFIAPI
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SerialGetControl (
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IN EFI_SERIAL_IO_PROTOCOL *This,
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OUT UINT32 *Control
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);
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/**
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Writes data to a serial device.
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@param This Protocol instance pointer.
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@param BufferSize On input, the size of the Buffer. On output, the amount of
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data actually written.
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@param Buffer The buffer of data to write
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@retval EFI_SUCCESS The data was written.
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@retval EFI_DEVICE_ERROR The device reported an error.
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@retval EFI_TIMEOUT The data write was stopped due to a timeout.
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**/
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EFI_STATUS
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EFIAPI
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SerialWrite (
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IN EFI_SERIAL_IO_PROTOCOL *This,
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IN OUT UINTN *BufferSize,
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IN VOID *Buffer
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);
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/**
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Reads data from a serial device.
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@param This Protocol instance pointer.
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@param BufferSize On input, the size of the Buffer. On output, the amount of
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data returned in Buffer.
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@param Buffer The buffer to return the data into.
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@retval EFI_SUCCESS The data was read.
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@retval EFI_DEVICE_ERROR The device reported an error.
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@retval EFI_TIMEOUT The data write was stopped due to a timeout.
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**/
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EFI_STATUS
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EFIAPI
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SerialRead (
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IN EFI_SERIAL_IO_PROTOCOL *This,
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IN OUT UINTN *BufferSize,
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OUT VOID *Buffer
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);
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EFI_HANDLE mSerialHandle = NULL;
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SERIAL_DEVICE_PATH mSerialDevicePath = {
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{
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{ HARDWARE_DEVICE_PATH, HW_VENDOR_DP, { sizeof (VENDOR_DEVICE_PATH), 0} },
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EDKII_SERIAL_PORT_LIB_VENDOR_GUID
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},
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{
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{ MESSAGING_DEVICE_PATH, MSG_UART_DP, { sizeof (UART_DEVICE_PATH), 0} },
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0, // Reserved
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0, // BaudRate
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0, // DataBits
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0, // Parity
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0 // StopBits
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},
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{ END_DEVICE_PATH_TYPE, END_ENTIRE_DEVICE_PATH_SUBTYPE, { sizeof (EFI_DEVICE_PATH_PROTOCOL), 0 } }
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};
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//
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// Template used to initialize the Serial IO protocols.
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//
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EFI_SERIAL_IO_MODE mSerialIoMode = {
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//
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// value field set in SerialDxeInitialize()?
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//--------- ------------------- -----------------------------
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0, // ControlMask
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1000 * 1000, // Timeout
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0, // BaudRate yes
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1, // ReceiveFifoDepth
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0, // DataBits yes
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0, // Parity yes
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0 // StopBits yes
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};
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EFI_SERIAL_IO_PROTOCOL mSerialIoTemplate = {
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SERIAL_IO_INTERFACE_REVISION,
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SerialReset,
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SerialSetAttributes,
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SerialSetControl,
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SerialGetControl,
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SerialWrite,
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SerialRead,
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&mSerialIoMode
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};
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/**
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Reset the serial device.
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@param This Protocol instance pointer.
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@retval EFI_SUCCESS The device was reset.
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@retval EFI_DEVICE_ERROR The serial device could not be reset.
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**/
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EFI_STATUS
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EFIAPI
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SerialReset (
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IN EFI_SERIAL_IO_PROTOCOL *This
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)
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{
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EFI_STATUS Status;
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Status = SerialPortInitialize ();
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if (EFI_ERROR (Status)) {
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return Status;
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}
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//
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// Go set the current attributes
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//
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Status = This->SetAttributes (
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This,
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This->Mode->BaudRate,
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This->Mode->ReceiveFifoDepth,
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This->Mode->Timeout,
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(EFI_PARITY_TYPE) This->Mode->Parity,
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(UINT8) This->Mode->DataBits,
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(EFI_STOP_BITS_TYPE) This->Mode->StopBits
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);
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//
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// The serial device may not support some of the attributes. To prevent
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// later failure, always return EFI_SUCCESS when SetAttributes is returning
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// EFI_INVALID_PARAMETER.
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//
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if (Status == EFI_INVALID_PARAMETER) {
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return EFI_SUCCESS;
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}
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return Status;
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}
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/**
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Sets the baud rate, receive FIFO depth, transmit/receive time out, parity,
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data bits, and stop bits on a serial device.
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@param This Protocol instance pointer.
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@param BaudRate The requested baud rate. A BaudRate value of 0 will use the the
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device's default interface speed.
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@param ReceiveFifoDepth The requested depth of the FIFO on the receive side of the
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serial interface. A ReceiveFifoDepth value of 0 will use
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the device's default FIFO depth.
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@param Timeout The requested time out for a single character in microseconds.
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This timeout applies to both the transmit and receive side of the
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interface. A Timeout value of 0 will use the device's default time
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out value.
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@param Parity The type of parity to use on this serial device. A Parity value of
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DefaultParity will use the device's default parity value.
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@param DataBits The number of data bits to use on the serial device. A DataBits
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value of 0 will use the device's default data bit setting.
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@param StopBits The number of stop bits to use on this serial device. A StopBits
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value of DefaultStopBits will use the device's default number of
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stop bits.
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@retval EFI_SUCCESS The device was reset.
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@retval EFI_INVALID_PARAMETER One or more attributes has an unsupported value.
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@retval EFI_DEVICE_ERROR The serial device is not functioning correctly.
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**/
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EFI_STATUS
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EFIAPI
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SerialSetAttributes (
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IN EFI_SERIAL_IO_PROTOCOL *This,
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IN UINT64 BaudRate,
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IN UINT32 ReceiveFifoDepth,
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IN UINT32 Timeout,
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IN EFI_PARITY_TYPE Parity,
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IN UINT8 DataBits,
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IN EFI_STOP_BITS_TYPE StopBits
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)
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{
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EFI_STATUS Status;
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EFI_TPL Tpl;
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UINT64 OriginalBaudRate;
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UINT32 OriginalReceiveFifoDepth;
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UINT32 OriginalTimeout;
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EFI_PARITY_TYPE OriginalParity;
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UINT8 OriginalDataBits;
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EFI_STOP_BITS_TYPE OriginalStopBits;
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//
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// Preserve the original input values in case
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// SerialPortSetAttributes() updates the input/output
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// parameters even on error.
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//
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OriginalBaudRate = BaudRate;
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OriginalReceiveFifoDepth = ReceiveFifoDepth;
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OriginalTimeout = Timeout;
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OriginalParity = Parity;
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OriginalDataBits = DataBits;
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OriginalStopBits = StopBits;
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Status = SerialPortSetAttributes (&BaudRate, &ReceiveFifoDepth, &Timeout, &Parity, &DataBits, &StopBits);
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if (EFI_ERROR (Status)) {
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//
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// If it is just to set Timeout value and unsupported is returned,
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// do not return error.
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//
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if ((Status == EFI_UNSUPPORTED) &&
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(This->Mode->Timeout != OriginalTimeout) &&
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(This->Mode->ReceiveFifoDepth == OriginalReceiveFifoDepth) &&
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(This->Mode->BaudRate == OriginalBaudRate) &&
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(This->Mode->DataBits == (UINT32) OriginalDataBits) &&
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(This->Mode->Parity == (UINT32) OriginalParity) &&
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(This->Mode->StopBits == (UINT32) OriginalStopBits)) {
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//
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// Restore to the original input values.
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//
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BaudRate = OriginalBaudRate;
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ReceiveFifoDepth = OriginalReceiveFifoDepth;
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Timeout = OriginalTimeout;
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Parity = OriginalParity;
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DataBits = OriginalDataBits;
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StopBits = OriginalStopBits;
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Status = EFI_SUCCESS;
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} else if (Status == EFI_INVALID_PARAMETER || Status == EFI_UNSUPPORTED) {
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return EFI_INVALID_PARAMETER;
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} else {
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return EFI_DEVICE_ERROR;
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}
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}
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//
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// Set the Serial I/O mode and update the device path
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//
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Tpl = gBS->RaiseTPL (TPL_NOTIFY);
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//
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// Set the Serial I/O mode
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//
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This->Mode->ReceiveFifoDepth = ReceiveFifoDepth;
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This->Mode->Timeout = Timeout;
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This->Mode->BaudRate = BaudRate;
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This->Mode->DataBits = (UINT32) DataBits;
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This->Mode->Parity = (UINT32) Parity;
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This->Mode->StopBits = (UINT32) StopBits;
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//
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// Check if the device path has actually changed
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//
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if (mSerialDevicePath.Uart.BaudRate == BaudRate &&
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mSerialDevicePath.Uart.DataBits == DataBits &&
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mSerialDevicePath.Uart.Parity == (UINT8) Parity &&
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mSerialDevicePath.Uart.StopBits == (UINT8) StopBits
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) {
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gBS->RestoreTPL (Tpl);
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return EFI_SUCCESS;
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}
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//
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// Update the device path
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//
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mSerialDevicePath.Uart.BaudRate = BaudRate;
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mSerialDevicePath.Uart.DataBits = DataBits;
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mSerialDevicePath.Uart.Parity = (UINT8) Parity;
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mSerialDevicePath.Uart.StopBits = (UINT8) StopBits;
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Status = gBS->ReinstallProtocolInterface (
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mSerialHandle,
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&gEfiDevicePathProtocolGuid,
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&mSerialDevicePath,
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&mSerialDevicePath
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);
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gBS->RestoreTPL (Tpl);
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return Status;
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}
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/**
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Set the control bits on a serial device
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@param This Protocol instance pointer.
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@param Control Set the bits of Control that are settable.
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@retval EFI_SUCCESS The new control bits were set on the serial device.
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@retval EFI_UNSUPPORTED The serial device does not support this operation.
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@retval EFI_DEVICE_ERROR The serial device is not functioning correctly.
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**/
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EFI_STATUS
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EFIAPI
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SerialSetControl (
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IN EFI_SERIAL_IO_PROTOCOL *This,
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IN UINT32 Control
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)
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{
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return SerialPortSetControl (Control);
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}
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/**
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Retrieves the status of the control bits on a serial device
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@param This Protocol instance pointer.
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@param Control A pointer to return the current Control signals from the serial device.
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@retval EFI_SUCCESS The control bits were read from the serial device.
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@retval EFI_DEVICE_ERROR The serial device is not functioning correctly.
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**/
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EFI_STATUS
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EFIAPI
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SerialGetControl (
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IN EFI_SERIAL_IO_PROTOCOL *This,
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OUT UINT32 *Control
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)
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{
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return SerialPortGetControl (Control);
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}
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/**
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Writes data to a serial device.
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@param This Protocol instance pointer.
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@param BufferSize On input, the size of the Buffer. On output, the amount of
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data actually written.
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@param Buffer The buffer of data to write
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@retval EFI_SUCCESS The data was written.
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@retval EFI_DEVICE_ERROR The device reported an error.
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@retval EFI_TIMEOUT The data write was stopped due to a timeout.
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**/
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EFI_STATUS
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EFIAPI
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SerialWrite (
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IN EFI_SERIAL_IO_PROTOCOL *This,
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IN OUT UINTN *BufferSize,
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IN VOID *Buffer
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)
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{
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UINTN Count;
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Count = SerialPortWrite (Buffer, *BufferSize);
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if (Count != *BufferSize) {
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*BufferSize = Count;
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return EFI_TIMEOUT;
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}
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return EFI_SUCCESS;
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}
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/**
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Reads data from a serial device.
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@param This Protocol instance pointer.
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@param BufferSize On input, the size of the Buffer. On output, the amount of
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data returned in Buffer.
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@param Buffer The buffer to return the data into.
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@retval EFI_SUCCESS The data was read.
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@retval EFI_DEVICE_ERROR The device reported an error.
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@retval EFI_TIMEOUT The data write was stopped due to a timeout.
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**/
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EFI_STATUS
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EFIAPI
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SerialRead (
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IN EFI_SERIAL_IO_PROTOCOL *This,
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IN OUT UINTN *BufferSize,
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OUT VOID *Buffer
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)
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{
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UINTN Count;
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UINTN TimeOut;
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Count = 0;
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while (Count < *BufferSize) {
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TimeOut = 0;
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while (TimeOut < mSerialIoMode.Timeout) {
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if (SerialPortPoll ()) {
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break;
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}
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gBS->Stall (10);
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TimeOut += 10;
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}
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if (TimeOut >= mSerialIoMode.Timeout) {
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break;
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}
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SerialPortRead (Buffer, 1);
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Count++;
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Buffer = (VOID *) ((UINT8 *) Buffer + 1);
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}
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if (Count != *BufferSize) {
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*BufferSize = Count;
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return EFI_TIMEOUT;
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}
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return EFI_SUCCESS;
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}
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/**
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Initialization for the Serial Io Protocol.
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@param[in] ImageHandle The firmware allocated handle for the EFI image.
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@param[in] SystemTable A pointer to the EFI System Table.
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@retval EFI_SUCCESS The entry point is executed successfully.
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@retval other Some error occurs when executing this entry point.
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**/
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EFI_STATUS
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EFIAPI
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SerialDxeInitialize (
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IN EFI_HANDLE ImageHandle,
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IN EFI_SYSTEM_TABLE *SystemTable
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)
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{
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EFI_STATUS Status;
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mSerialIoMode.BaudRate = PcdGet64 (PcdUartDefaultBaudRate);
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mSerialIoMode.DataBits = (UINT32) PcdGet8 (PcdUartDefaultDataBits);
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mSerialIoMode.Parity = (UINT32) PcdGet8 (PcdUartDefaultParity);
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mSerialIoMode.StopBits = (UINT32) PcdGet8 (PcdUartDefaultStopBits);
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mSerialIoMode.ReceiveFifoDepth = PcdGet16 (PcdUartDefaultReceiveFifoDepth);
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mSerialDevicePath.Uart.BaudRate = PcdGet64 (PcdUartDefaultBaudRate);
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mSerialDevicePath.Uart.DataBits = PcdGet8 (PcdUartDefaultDataBits);
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mSerialDevicePath.Uart.Parity = PcdGet8 (PcdUartDefaultParity);
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mSerialDevicePath.Uart.StopBits = PcdGet8 (PcdUartDefaultStopBits);
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//
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// Issue a reset to initialize the Serial Port
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//
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Status = mSerialIoTemplate.Reset (&mSerialIoTemplate);
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if (EFI_ERROR (Status)) {
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return Status;
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}
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//
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|
// Make a new handle with Serial IO protocol and its device path on it.
|
|
//
|
|
Status = gBS->InstallMultipleProtocolInterfaces (
|
|
&mSerialHandle,
|
|
&gEfiSerialIoProtocolGuid, &mSerialIoTemplate,
|
|
&gEfiDevicePathProtocolGuid, &mSerialDevicePath,
|
|
NULL
|
|
);
|
|
ASSERT_EFI_ERROR (Status);
|
|
|
|
return Status;
|
|
}
|
|
|