mirror of https://github.com/acidanthera/audk.git
138 lines
6.0 KiB
C
138 lines
6.0 KiB
C
/** @file
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Serial I/O Port library functions with no library constructor/destructor
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Copyright (c) 2012-2014, ARM Ltd. All rights reserved.<BR>
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This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#include <Base.h>
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#include <Library/IoLib.h>
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#include <Library/PcdLib.h>
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#include <Library/SerialPortExtLib.h>
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#include <Drivers/PL011Uart.h>
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/**
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Set new attributes to PL011.
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@param BaudRate The baud rate of the serial device. If the baud rate is not supported,
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the speed will be reduced down to the nearest supported one and the
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variable's value will be updated accordingly.
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@param ReceiveFifoDepth The number of characters the device will buffer on input. If the specified
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value is not supported, the variable's value will be reduced down to the
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nearest supported one.
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@param Timeout If applicable, the number of microseconds the device will wait
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before timing out a Read or a Write operation.
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@param Parity If applicable, this is the EFI_PARITY_TYPE that is computed or checked
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as each character is transmitted or received. If the device does not
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support parity, the value is the default parity value.
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@param DataBits The number of data bits in each character
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@param StopBits If applicable, the EFI_STOP_BITS_TYPE number of stop bits per character.
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If the device does not support stop bits, the value is the default stop
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bit value.
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@retval EFI_SUCCESS All attributes were set correctly on the serial device.
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@retval EFI_INVALID_PARAMETERS One or more of the attributes has an unsupported value.
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**/
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RETURN_STATUS
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EFIAPI
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SerialPortSetAttributes (
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IN OUT UINT64 *BaudRate,
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IN OUT UINT32 *ReceiveFifoDepth,
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IN OUT UINT32 *Timeout,
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IN OUT EFI_PARITY_TYPE *Parity,
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IN OUT UINT8 *DataBits,
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IN OUT EFI_STOP_BITS_TYPE *StopBits
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)
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{
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return PL011UartInitializePort (
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(UINTN)PcdGet64 (PcdSerialRegisterBase),
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BaudRate,
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ReceiveFifoDepth,
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Parity,
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DataBits,
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StopBits);
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}
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/**
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Assert or deassert the control signals on a serial port.
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The following control signals are set according their bit settings :
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. Request to Send
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. Data Terminal Ready
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@param[in] Control The following bits are taken into account :
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. EFI_SERIAL_REQUEST_TO_SEND : assert/deassert the
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"Request To Send" control signal if this bit is
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equal to one/zero.
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. EFI_SERIAL_DATA_TERMINAL_READY : assert/deassert
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the "Data Terminal Ready" control signal if this
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bit is equal to one/zero.
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. EFI_SERIAL_HARDWARE_LOOPBACK_ENABLE : enable/disable
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the hardware loopback if this bit is equal to
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one/zero.
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. EFI_SERIAL_SOFTWARE_LOOPBACK_ENABLE : not supported.
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. EFI_SERIAL_HARDWARE_FLOW_CONTROL_ENABLE : enable/
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disable the hardware flow control based on CTS (Clear
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To Send) and RTS (Ready To Send) control signals.
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@retval RETURN_SUCCESS The new control bits were set on the serial device.
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@retval RETURN_UNSUPPORTED The serial device does not support this operation.
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**/
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RETURN_STATUS
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EFIAPI
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SerialPortSetControl (
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IN UINT32 Control
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)
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{
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return PL011UartSetControl ((UINTN)PcdGet64 (PcdSerialRegisterBase), Control);
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}
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/**
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Retrieve the status of the control bits on a serial device.
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@param[out] Control Status of the control bits on a serial device :
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. EFI_SERIAL_DATA_CLEAR_TO_SEND, EFI_SERIAL_DATA_SET_READY,
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EFI_SERIAL_RING_INDICATE, EFI_SERIAL_CARRIER_DETECT,
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EFI_SERIAL_REQUEST_TO_SEND, EFI_SERIAL_DATA_TERMINAL_READY
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are all related to the DTE (Data Terminal Equipment) and
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DCE (Data Communication Equipment) modes of operation of
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the serial device.
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. EFI_SERIAL_INPUT_BUFFER_EMPTY : equal to one if the receive
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buffer is empty, 0 otherwise.
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. EFI_SERIAL_OUTPUT_BUFFER_EMPTY : equal to one if the transmit
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buffer is empty, 0 otherwise.
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. EFI_SERIAL_HARDWARE_LOOPBACK_ENABLE : equal to one if the
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hardware loopback is enabled (the ouput feeds the receive
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buffer), 0 otherwise.
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. EFI_SERIAL_SOFTWARE_LOOPBACK_ENABLE : equal to one if a
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loopback is accomplished by software, 0 otherwise.
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. EFI_SERIAL_HARDWARE_FLOW_CONTROL_ENABLE : equal to one if the
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hardware flow control based on CTS (Clear To Send) and RTS
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(Ready To Send) control signals is enabled, 0 otherwise.
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@retval RETURN_SUCCESS The control bits were read from the serial device.
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**/
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RETURN_STATUS
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EFIAPI
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SerialPortGetControl (
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OUT UINT32 *Control
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)
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{
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return PL011UartGetControl ((UINTN)PcdGet64 (PcdSerialRegisterBase), Control);
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}
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