123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208 |
- /** @file
- Serial I/O Port library functions with no library constructor/destructor
- Copyright (c) 2008 - 2009, Apple Inc. 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/DebugLib.h>
- #include <Library/SerialPortLib.h>
- #include <Library/PcdLib.h>
- #include <Library/IoLib.h>
- #include <Library/OmapLib.h>
- #include <Omap3530/Omap3530.h>
- /*
- Programmed hardware of Serial port.
- @return Always return EFI_UNSUPPORTED.
- **/
- RETURN_STATUS
- EFIAPI
- SerialPortInitialize (
- VOID
- )
- {
- // assume assembly code at reset vector has setup UART
- return RETURN_SUCCESS;
- }
- /**
- Write data to serial device.
- @param Buffer Point of data buffer which need to be writed.
- @param NumberOfBytes Number of output bytes which are cached in Buffer.
- @retval 0 Write data failed.
- @retval !0 Actual number of bytes writed to serial device.
- **/
- UINTN
- EFIAPI
- SerialPortWrite (
- IN UINT8 *Buffer,
- IN UINTN NumberOfBytes
- )
- {
- UINT32 LSR = UartBase(PcdGet32(PcdOmap35xxConsoleUart)) + UART_LSR_REG;
- UINT32 THR = UartBase(PcdGet32(PcdOmap35xxConsoleUart)) + UART_THR_REG;
- UINTN Count;
- for (Count = 0; Count < NumberOfBytes; Count++, Buffer++) {
- while ((MmioRead8(LSR) & UART_LSR_TX_FIFO_E_MASK) == UART_LSR_TX_FIFO_E_NOT_EMPTY);
- MmioWrite8(THR, *Buffer);
- }
- return NumberOfBytes;
- }
- /**
- Read data from serial device and save the datas in buffer.
- @param Buffer Point of data buffer which need to be writed.
- @param NumberOfBytes Number of output bytes which are cached in Buffer.
- @retval 0 Read data failed.
- @retval !0 Aactual number of bytes read from serial device.
- **/
- UINTN
- EFIAPI
- SerialPortRead (
- OUT UINT8 *Buffer,
- IN UINTN NumberOfBytes
- )
- {
- UINT32 LSR = UartBase(PcdGet32(PcdOmap35xxConsoleUart)) + UART_LSR_REG;
- UINT32 RBR = UartBase(PcdGet32(PcdOmap35xxConsoleUart)) + UART_RBR_REG;
- UINTN Count;
- for (Count = 0; Count < NumberOfBytes; Count++, Buffer++) {
- while ((MmioRead8(LSR) & UART_LSR_RX_FIFO_E_MASK) == UART_LSR_RX_FIFO_E_EMPTY);
- *Buffer = MmioRead8(RBR);
- }
- return NumberOfBytes;
- }
- /**
- Check to see if any data is avaiable to be read from the debug device.
- @retval EFI_SUCCESS At least one byte of data is avaiable to be read
- @retval EFI_NOT_READY No data is avaiable to be read
- @retval EFI_DEVICE_ERROR The serial device is not functioning properly
- **/
- BOOLEAN
- EFIAPI
- SerialPortPoll (
- VOID
- )
- {
- UINT32 LSR = UartBase(PcdGet32(PcdOmap35xxConsoleUart)) + UART_LSR_REG;
- if ((MmioRead8(LSR) & UART_LSR_RX_FIFO_E_MASK) == UART_LSR_RX_FIFO_E_NOT_EMPTY) {
- return TRUE;
- } else {
- return FALSE;
- }
- }
- /**
- Sets the control bits on a serial device.
- @param[in] Control Sets the bits of Control that are settable.
- @retval RETURN_SUCCESS The new control bits were set on the serial device.
- @retval RETURN_UNSUPPORTED The serial device does not support this operation.
- @retval RETURN_DEVICE_ERROR The serial device is not functioning correctly.
- **/
- RETURN_STATUS
- EFIAPI
- SerialPortSetControl (
- IN UINT32 Control
- )
- {
- return RETURN_UNSUPPORTED;
- }
- /**
- Retrieve the status of the control bits on a serial device.
- @param[out] Control A pointer to return the current control signals from the serial device.
- @retval RETURN_SUCCESS The control bits were read from the serial device.
- @retval RETURN_UNSUPPORTED The serial device does not support this operation.
- @retval RETURN_DEVICE_ERROR The serial device is not functioning correctly.
- **/
- RETURN_STATUS
- EFIAPI
- SerialPortGetControl (
- OUT UINT32 *Control
- )
- {
- *Control = 0;
- if (!SerialPortPoll ()) {
- *Control = EFI_SERIAL_INPUT_BUFFER_EMPTY;
- }
- return RETURN_SUCCESS;
- }
- /**
- 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;
- }
|