f4dfad05dd
https://bugzilla.tianocore.org/show_bug.cgi?id=1373 Replace BSD 2-Clause License with BSD+Patent License. This change is based on the following emails: https://lists.01.org/pipermail/edk2-devel/2019-February/036260.html https://lists.01.org/pipermail/edk2-devel/2018-October/030385.html RFCs with detailed process for the license change: V3: https://lists.01.org/pipermail/edk2-devel/2019-March/038116.html V2: https://lists.01.org/pipermail/edk2-devel/2019-March/037669.html V1: https://lists.01.org/pipermail/edk2-devel/2019-March/037500.html Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Michael D Kinney <michael.d.kinney@intel.com> Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org>
238 lines
8.6 KiB
C
238 lines
8.6 KiB
C
/** @file
|
|
Serial I/O Port library functions with no library constructor/destructor
|
|
|
|
Copyright (c) 2008 - 2010, Apple Inc. All rights reserved.<BR>
|
|
Copyright (c) 2012 - 2016, ARM Ltd. All rights reserved.<BR>
|
|
Copyright (c) 2015, Intel Corporation. All rights reserved.<BR>
|
|
|
|
SPDX-License-Identifier: BSD-2-Clause-Patent
|
|
|
|
**/
|
|
|
|
#include <Base.h>
|
|
|
|
#include <Library/IoLib.h>
|
|
#include <Library/PcdLib.h>
|
|
#include <Library/PL011UartClockLib.h>
|
|
#include <Library/PL011UartLib.h>
|
|
#include <Library/SerialPortLib.h>
|
|
|
|
/** Initialise the serial device hardware with default settings.
|
|
|
|
@retval RETURN_SUCCESS The serial device was initialised.
|
|
@retval RETURN_INVALID_PARAMETER One or more of the default settings
|
|
has an unsupported value.
|
|
**/
|
|
RETURN_STATUS
|
|
EFIAPI
|
|
SerialPortInitialize (
|
|
VOID
|
|
)
|
|
{
|
|
UINT64 BaudRate;
|
|
UINT32 ReceiveFifoDepth;
|
|
EFI_PARITY_TYPE Parity;
|
|
UINT8 DataBits;
|
|
EFI_STOP_BITS_TYPE StopBits;
|
|
|
|
BaudRate = FixedPcdGet64 (PcdUartDefaultBaudRate);
|
|
ReceiveFifoDepth = 0; // Use default FIFO depth
|
|
Parity = (EFI_PARITY_TYPE)FixedPcdGet8 (PcdUartDefaultParity);
|
|
DataBits = FixedPcdGet8 (PcdUartDefaultDataBits);
|
|
StopBits = (EFI_STOP_BITS_TYPE) FixedPcdGet8 (PcdUartDefaultStopBits);
|
|
|
|
return PL011UartInitializePort (
|
|
(UINTN)PcdGet64 (PcdSerialRegisterBase),
|
|
PL011UartClockGetFreq(),
|
|
&BaudRate,
|
|
&ReceiveFifoDepth,
|
|
&Parity,
|
|
&DataBits,
|
|
&StopBits
|
|
);
|
|
}
|
|
|
|
/**
|
|
Write data to serial device.
|
|
|
|
@param Buffer Point of data buffer which need to be written.
|
|
@param NumberOfBytes Number of output bytes which are cached in Buffer.
|
|
|
|
@retval 0 Write data failed.
|
|
@retval !0 Actual number of bytes written to serial device.
|
|
|
|
**/
|
|
UINTN
|
|
EFIAPI
|
|
SerialPortWrite (
|
|
IN UINT8 *Buffer,
|
|
IN UINTN NumberOfBytes
|
|
)
|
|
{
|
|
return PL011UartWrite ((UINTN)PcdGet64 (PcdSerialRegisterBase), Buffer, NumberOfBytes);
|
|
}
|
|
|
|
/**
|
|
Read data from serial device and save the data in buffer.
|
|
|
|
@param Buffer Point of data buffer which need to be written.
|
|
@param NumberOfBytes Number of output bytes which are cached in Buffer.
|
|
|
|
@retval 0 Read data failed.
|
|
@retval !0 Actual number of bytes read from serial device.
|
|
|
|
**/
|
|
UINTN
|
|
EFIAPI
|
|
SerialPortRead (
|
|
OUT UINT8 *Buffer,
|
|
IN UINTN NumberOfBytes
|
|
)
|
|
{
|
|
return PL011UartRead ((UINTN)PcdGet64 (PcdSerialRegisterBase), Buffer, NumberOfBytes);
|
|
}
|
|
|
|
/**
|
|
Check to see if any data is available to be read from the debug device.
|
|
|
|
@retval TRUE At least one byte of data is available to be read
|
|
@retval FALSE No data is available to be read
|
|
|
|
**/
|
|
BOOLEAN
|
|
EFIAPI
|
|
SerialPortPoll (
|
|
VOID
|
|
)
|
|
{
|
|
return PL011UartPoll ((UINTN)PcdGet64 (PcdSerialRegisterBase));
|
|
}
|
|
/**
|
|
Set new attributes to PL011.
|
|
|
|
@param BaudRate The baud rate of the serial device. If the
|
|
baud rate is not supported, the speed will
|
|
be reduced down to the nearest supported one
|
|
and the variable's value will be updated
|
|
accordingly.
|
|
@param ReceiveFifoDepth The number of characters the device will
|
|
buffer on input. If the specified value is
|
|
not supported, the variable's value will
|
|
be reduced down to the nearest supported one.
|
|
@param Timeout If applicable, the number of microseconds the
|
|
device will wait before timing out a Read or
|
|
a Write operation.
|
|
@param Parity If applicable, this is the EFI_PARITY_TYPE
|
|
that is computed or checked as each character
|
|
is transmitted or received. If the device
|
|
does not support parity, the value is the
|
|
default parity value.
|
|
@param DataBits The number of data bits in each character
|
|
@param StopBits If applicable, the EFI_STOP_BITS_TYPE number
|
|
of stop bits per character. If the device
|
|
does not support stop bits, the value is the
|
|
default stop bit value.
|
|
|
|
@retval EFI_SUCCESS All attributes were set correctly.
|
|
@retval EFI_INVALID_PARAMETERS One or more attributes has an unsupported
|
|
value.
|
|
|
|
**/
|
|
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 PL011UartInitializePort (
|
|
(UINTN)PcdGet64 (PcdSerialRegisterBase),
|
|
PL011UartClockGetFreq(),
|
|
BaudRate,
|
|
ReceiveFifoDepth,
|
|
Parity,
|
|
DataBits,
|
|
StopBits
|
|
);
|
|
}
|
|
|
|
/**
|
|
|
|
Assert or deassert the control signals on a serial port.
|
|
The following control signals are set according their bit settings :
|
|
. Request to Send
|
|
. Data Terminal Ready
|
|
|
|
@param[in] Control The following bits are taken into account :
|
|
. EFI_SERIAL_REQUEST_TO_SEND : assert/deassert the
|
|
"Request To Send" control signal if this bit is
|
|
equal to one/zero.
|
|
. EFI_SERIAL_DATA_TERMINAL_READY : assert/deassert
|
|
the "Data Terminal Ready" control signal if this
|
|
bit is equal to one/zero.
|
|
. EFI_SERIAL_HARDWARE_LOOPBACK_ENABLE : enable/disable
|
|
the hardware loopback if this bit is equal to
|
|
one/zero.
|
|
. EFI_SERIAL_SOFTWARE_LOOPBACK_ENABLE : not supported.
|
|
. EFI_SERIAL_HARDWARE_FLOW_CONTROL_ENABLE : enable/
|
|
disable the hardware flow control based on CTS (Clear
|
|
To Send) and RTS (Ready To Send) control signals.
|
|
|
|
@retval RETURN_SUCCESS The new control bits were set on the device.
|
|
@retval RETURN_UNSUPPORTED The device does not support this operation.
|
|
|
|
**/
|
|
RETURN_STATUS
|
|
EFIAPI
|
|
SerialPortSetControl (
|
|
IN UINT32 Control
|
|
)
|
|
{
|
|
return PL011UartSetControl ((UINTN)PcdGet64 (PcdSerialRegisterBase), Control);
|
|
}
|
|
|
|
/**
|
|
|
|
Retrieve the status of the control bits on a serial device.
|
|
|
|
@param[out] Control Status of the control bits on a serial device :
|
|
|
|
. EFI_SERIAL_DATA_CLEAR_TO_SEND,
|
|
EFI_SERIAL_DATA_SET_READY,
|
|
EFI_SERIAL_RING_INDICATE,
|
|
EFI_SERIAL_CARRIER_DETECT,
|
|
EFI_SERIAL_REQUEST_TO_SEND,
|
|
EFI_SERIAL_DATA_TERMINAL_READY
|
|
are all related to the DTE (Data Terminal Equipment)
|
|
and DCE (Data Communication Equipment) modes of
|
|
operation of the serial device.
|
|
. EFI_SERIAL_INPUT_BUFFER_EMPTY : equal to one if the
|
|
receive buffer is empty, 0 otherwise.
|
|
. EFI_SERIAL_OUTPUT_BUFFER_EMPTY : equal to one if the
|
|
transmit buffer is empty, 0 otherwise.
|
|
. EFI_SERIAL_HARDWARE_LOOPBACK_ENABLE : equal to one if
|
|
the hardware loopback is enabled (the output feeds
|
|
the receive buffer), 0 otherwise.
|
|
. EFI_SERIAL_SOFTWARE_LOOPBACK_ENABLE : equal to one
|
|
if a loopback is accomplished by software, else 0.
|
|
. EFI_SERIAL_HARDWARE_FLOW_CONTROL_ENABLE : equal to
|
|
one if the hardware flow control based on CTS (Clear
|
|
To Send) and RTS (Ready To Send) control signals is
|
|
enabled, 0 otherwise.
|
|
|
|
@retval RETURN_SUCCESS The control bits were read from the device.
|
|
|
|
**/
|
|
RETURN_STATUS
|
|
EFIAPI
|
|
SerialPortGetControl (
|
|
OUT UINT32 *Control
|
|
)
|
|
{
|
|
return PL011UartGetControl ((UINTN)PcdGet64 (PcdSerialRegisterBase), Control);
|
|
}
|