2 Serial I/O Port library functions with no library constructor/destructor
4 Copyright (c) 2008 - 2010, Apple Inc. All rights reserved.<BR>
5 Copyright (c) 2012, ARM Ltd. All rights reserved.<BR>
7 This program and the accompanying materials
8 are licensed and made available under the terms and conditions of the BSD License
9 which accompanies this distribution. The full text of the license may be found at
10 http://opensource.org/licenses/bsd-license.php
12 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
13 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
19 #include <Library/IoLib.h>
20 #include <Library/PcdLib.h>
21 #include <Library/SerialPortLib.h>
23 #include <Drivers/PL011Uart.h>
28 Programmed hardware of Serial port.
30 @return Always return RETURN_UNSUPPORTED.
35 SerialPortInitialize (
39 return PL011UartInitializePort (
40 (UINTN
)PcdGet64 (PcdSerialRegisterBase
),
41 (UINTN
)PcdGet64 (PcdUartDefaultBaudRate
),
42 0, // Use the default value for Fifo depth
43 (EFI_PARITY_TYPE
)PcdGet8 (PcdUartDefaultParity
),
44 PcdGet8 (PcdUartDefaultDataBits
),
45 (EFI_STOP_BITS_TYPE
) PcdGet8 (PcdUartDefaultStopBits
));
49 Write data to serial device.
51 @param Buffer Point of data buffer which need to be written.
52 @param NumberOfBytes Number of output bytes which are cached in Buffer.
54 @retval 0 Write data failed.
55 @retval !0 Actual number of bytes written to serial device.
62 IN UINTN NumberOfBytes
65 return PL011UartWrite ((UINTN
)PcdGet64 (PcdSerialRegisterBase
), Buffer
, NumberOfBytes
);
69 Read data from serial device and save the data in buffer.
71 @param Buffer Point of data buffer which need to be written.
72 @param NumberOfBytes Number of output bytes which are cached in Buffer.
74 @retval 0 Read data failed.
75 @retval !0 Actual number of bytes read from serial device.
82 IN UINTN NumberOfBytes
85 return PL011UartRead ((UINTN
)PcdGet64 (PcdSerialRegisterBase
), Buffer
, NumberOfBytes
);
89 Check to see if any data is available to be read from the debug device.
91 @retval EFI_SUCCESS At least one byte of data is available to be read
92 @retval EFI_NOT_READY No data is available to be read
93 @retval EFI_DEVICE_ERROR The serial device is not functioning properly
102 return PL011UartPoll ((UINTN
)PcdGet64 (PcdSerialRegisterBase
));