diff options
Diffstat (limited to 'Silicon/Hisilicon/Library/Dw8250SerialPortRuntimeLib/Dw8250SerialPortRuntimeLib.c')
| -rw-r--r-- | Silicon/Hisilicon/Library/Dw8250SerialPortRuntimeLib/Dw8250SerialPortRuntimeLib.c | 356 |
1 files changed, 356 insertions, 0 deletions
diff --git a/Silicon/Hisilicon/Library/Dw8250SerialPortRuntimeLib/Dw8250SerialPortRuntimeLib.c b/Silicon/Hisilicon/Library/Dw8250SerialPortRuntimeLib/Dw8250SerialPortRuntimeLib.c new file mode 100644 index 0000000000..d092659228 --- /dev/null +++ b/Silicon/Hisilicon/Library/Dw8250SerialPortRuntimeLib/Dw8250SerialPortRuntimeLib.c @@ -0,0 +1,356 @@ +/** @file
+*
+* Copyright (c) 2011-2015, ARM Limited. All rights reserved.
+* Copyright (c) 2015, Hisilicon Limited. All rights reserved.
+* Copyright (c) 2015, Linaro Limited. All rights reserved.
+*
+* This program and the accompanying materials
+* are licensed and made available under the terms and conditions of the BSD License
+* which accompanies this distribution. The full text of the license may be found at
+* http://opensource.org/licenses/bsd-license.php
+*
+* THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+* WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+*
+* Based on the files under ArmPlatformPkg/Library/PL011SerialPortLib/
+**/
+#include <Uefi.h>
+#include <PiDxe.h>
+
+#include <Library/PcdLib.h>
+#include <Library/SerialPortLib.h>
+#include <Library/IoLib.h>
+#include <Library/UefiRuntimeLib.h>
+#include <Library/UefiBootServicesTableLib.h>
+#include <Library/DxeServicesTableLib.h>
+
+#include <Protocol/SerialIo.h>
+#include <Guid/EventGroup.h>
+#include "Dw8250SerialPortRuntimeLib.h"
+
+UINT64 mSerialRegBaseAddr = 0;
+
+EFI_EVENT mSerialVirtualAddressChangeEvent = NULL;
+
+VOID
+EFIAPI
+SerialVirtualAddressChangeCallBack (
+ IN EFI_EVENT Event,
+ IN VOID *Context
+ )
+{
+ EfiConvertPointer (0, (VOID **) &mSerialRegBaseAddr);
+
+ return;
+}
+
+
+EFI_STATUS
+EFIAPI
+SerialPortLibDestructor (
+ IN EFI_HANDLE ImageHandle,
+ IN EFI_SYSTEM_TABLE *SystemTable
+ )
+{
+ EFI_STATUS Status = EFI_SUCCESS;
+
+ if(!mSerialVirtualAddressChangeEvent ){
+ return Status;
+ }
+
+ Status = gBS->CloseEvent(mSerialVirtualAddressChangeEvent);
+ return Status;
+}
+
+/**
+ Initialize the serial device hardware.
+
+ If no initialization is required, then return RETURN_SUCCESS.
+ If the serial device was successfuly initialized, then return RETURN_SUCCESS.
+ If the serial device could not be initialized, then return RETURN_DEVICE_ERROR.
+
+ @retval RETURN_SUCCESS The serial device was initialized.
+ @retval RETURN_DEVICE_ERROR The serail device could not be initialized.
+
+**/
+RETURN_STATUS
+EFIAPI
+SerialPortInitialize (
+ VOID
+ )
+{
+ EFI_STATUS Status = EFI_SUCCESS;
+ EFI_GCD_MEMORY_SPACE_DESCRIPTOR desp = {0};
+
+ mSerialRegBaseAddr = PcdGet64(PcdSerialRegisterBase);
+
+ Status = gDS->GetMemorySpaceDescriptor(PcdGet64(PcdSerialRegisterBase),&desp);
+ if(EFI_ERROR(Status)){
+ return Status;
+ }
+ desp.Attributes |= EFI_MEMORY_RUNTIME;
+ Status = gDS->SetMemorySpaceAttributes(PcdGet64(PcdSerialRegisterBase),PcdGet64(PcdSerialRegisterSpaceSize), desp.Attributes);
+ if(EFI_ERROR(Status)){
+ return Status;
+ }
+
+ Status = gBS->CreateEventEx (
+ EVT_NOTIFY_SIGNAL,
+ TPL_NOTIFY,
+ SerialVirtualAddressChangeCallBack,
+ NULL,
+ &gEfiEventVirtualAddressChangeGuid,
+ &mSerialVirtualAddressChangeEvent
+ );
+
+ if(EFI_ERROR(Status)){
+ mSerialVirtualAddressChangeEvent = NULL;
+ }
+
+ return Status;
+}
+
+
+/**
+ Write data from buffer to serial device.
+
+ Writes NumberOfBytes data bytes from Buffer to the serial device.
+ The number of bytes actually written to the serial device is returned.
+ If the return value is less than NumberOfBytes, then the write operation failed.
+
+ If Buffer is NULL, then ASSERT().
+
+ If NumberOfBytes is zero, then return 0.
+
+ @param Buffer Pointer to the data buffer to be written.
+ @param NumberOfBytes Number of bytes to written to the serial device.
+
+ @retval 0 NumberOfBytes is 0.
+ @retval >0 The number of bytes written to the serial device.
+ If this value is less than NumberOfBytes, then the read operation failed.
+
+**/
+UINTN
+EFIAPI
+SerialPortWrite (
+ IN UINT8 *Buffer,
+ IN UINTN NumberOfBytes
+)
+{
+ UINTN Result;
+
+ if (NULL == Buffer) {
+ return 0;
+ }
+
+ Result = NumberOfBytes;
+
+ while (NumberOfBytes--) {
+
+ SerialPortWriteChar(*Buffer);
+ Buffer++;
+ }
+
+ return Result;
+}
+
+
+/**
+ Reads data from a serial device into a buffer.
+
+ @param Buffer Pointer to the data buffer to store the data read from the serial device.
+ @param NumberOfBytes Number of bytes to read from the serial device.
+
+ @retval 0 NumberOfBytes is 0.
+ @retval >0 The number of bytes read from the serial device.
+ If this value is less than NumberOfBytes, then the read operation failed.
+
+**/
+UINTN
+EFIAPI
+SerialPortRead (
+ OUT UINT8 *Buffer,
+ IN UINTN NumberOfBytes
+)
+{
+ UINTN Result;
+
+ if (NULL == Buffer) {
+ return 0;
+ }
+
+ Result = 0;
+
+ while (NumberOfBytes--) {
+ //
+ // Wait for the serail port to be ready.
+ //
+ *Buffer=SerialPortReadChar();
+ Buffer++ ;
+ Result++;
+ }
+
+ return Result;
+}
+
+/**
+ Polls a serial device to see if there is any data waiting to be read.
+
+ Polls aserial device to see if there is any data waiting to be read.
+ If there is data waiting to be read from the serial device, then TRUE is returned.
+ If there is no data waiting to be read from the serial device, then FALSE is returned.
+
+ @retval TRUE Data is waiting to be read from the serial device.
+ @retval FALSE There is no data waiting to be read from the serial device.
+
+**/
+BOOLEAN
+EFIAPI
+SerialPortPoll (
+ VOID
+ )
+{
+
+ return (BOOLEAN) ((MmioRead8 (UART_LSR_REG) & UART_LSR_DR) == UART_LSR_DR);
+
+}
+
+
+VOID SerialPortWriteChar(UINT8 scShowChar)
+{
+ UINT32 ulLoop = 0;
+
+ while(ulLoop < (UINT32)UART_SEND_DELAY)
+ {
+
+ if ((MmioRead8 (UART_USR_REG) & 0x02) == 0x02)
+ {
+ break;
+ }
+
+ ulLoop++;
+ }
+ MmioWrite8 (UART_THR_REG, (UINT8)scShowChar);
+
+ ulLoop = 0;
+ while(ulLoop < (UINT32)UART_SEND_DELAY)
+ {
+ if ((MmioRead8 (UART_USR_REG) & 0x04) == 0x04)
+ {
+ break;
+ }
+ ulLoop++;
+ }
+
+ return;
+}
+
+
+UINT8 SerialPortReadChar(VOID)
+{
+ UINT8 recvchar = 0;
+
+ do
+ {
+ if ((MmioRead8 (UART_LSR_REG) & UART_LSR_DR) == UART_LSR_DR) {
+ break;
+ }
+
+ }while(MmioRead8 (UART_USR_REG) & UART_USR_BUSY);
+
+ recvchar = MmioRead8 (UART_RBR_REG);
+
+ return recvchar;
+}
+
+/**
+ Sets the baud rate, receive FIFO depth, transmit/receice time out, parity,
+ data bits, and stop bits on a serial device.
+
+ @param BaudRate The requested baud rate. A BaudRate value of 0 will use the
+ device's default interface speed.
+ On output, the value actually set.
+ @param ReveiveFifoDepth The requested depth of the FIFO on the receive side of the
+ serial interface. A ReceiveFifoDepth value of 0 will use
+ the device's default FIFO depth.
+ On output, the value actually set.
+ @param Timeout The requested time out for a single character in microseconds.
+ This timeout applies to both the transmit and receive side of the
+ interface. A Timeout value of 0 will use the device's default time
+ out value.
+ On output, the value actually set.
+ @param Parity The type of parity to use on this serial device. A Parity value of
+ DefaultParity will use the device's default parity value.
+ On output, the value actually set.
+ @param DataBits The number of data bits to use on the serial device. A DataBits
+ vaule of 0 will use the device's default data bit setting.
+ On output, the value actually set.
+ @param StopBits The number of stop bits to use on this serial device. A StopBits
+ value of DefaultStopBits will use the device's default number of
+ stop bits.
+ On output, the value actually set.
+
+ @retval RETURN_SUCCESS The new attributes were set on the serial device.
+ @retval RETURN_UNSUPPORTED The serial device does not support this operation.
+ @retval RETURN_INVALID_PARAMETER One or more of the attributes has an unsupported value.
+ @retval RETURN_DEVICE_ERROR The serial device is not functioning correctly.
+
+**/
+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 RETURN_UNSUPPORTED;
+}
+
+/**
+ Set the serial device control bits.
+
+ @param Control Control bits which are to be set on the serial device.
+
+ @retval EFI_SUCCESS The new control bits were set on the serial device.
+ @retval EFI_UNSUPPORTED The serial device does not support this operation.
+ @retval EFI_DEVICE_ERROR The serial device is not functioning correctly.
+
+**/
+RETURN_STATUS
+EFIAPI
+SerialPortSetControl (
+ IN UINT32 Control
+ )
+{
+ return EFI_UNSUPPORTED;
+}
+
+/**
+ Get the serial device control bits.
+
+ @param Control Control signals read from the serial device.
+
+ @retval EFI_SUCCESS The control bits were read from the serial device.
+ @retval EFI_DEVICE_ERROR The serial device is not functioning correctly.
+
+**/
+RETURN_STATUS
+EFIAPI
+SerialPortGetControl (
+ OUT UINT32 *Control
+ )
+{
+
+ if (SerialPortPoll ()) {
+ // If a character is pending don't set EFI_SERIAL_INPUT_BUFFER_EMPTY
+ *Control = EFI_SERIAL_OUTPUT_BUFFER_EMPTY;
+ } else {
+ *Control = EFI_SERIAL_INPUT_BUFFER_EMPTY | EFI_SERIAL_OUTPUT_BUFFER_EMPTY;
+ }
+ return EFI_SUCCESS;
+}
+
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