-/** @file
- Serial I/O Port library functions with no library constructor/destructor
-
-
- Copyright (c) 2008 - 2010, Apple Inc. All rights reserved.<BR>
-
- 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.
-
-**/
-
-#include <Include/Uefi.h>
-
-#include <Library/IoLib.h>
-
-#include <Drivers/PL011Uart.h>
-
-/*
-
- Programmed hardware of Serial port.
-
- @return Always return EFI_UNSUPPORTED.
-
-**/
-RETURN_STATUS
-EFIAPI
-PL011UartInitialize (
- IN UINTN UartBase,
- IN UINTN BaudRate,
- IN UINTN LineControl
- )
-{
- if (BaudRate == 115200) {
- // Initialize baud rate generator
- MmioWrite32 (UartBase + UARTIBRD, UART_115200_IDIV);
- MmioWrite32 (UartBase + UARTFBRD, UART_115200_FDIV);
- } else if (BaudRate == 38400) {
- // Initialize baud rate generator
- MmioWrite32 (UartBase + UARTIBRD, UART_38400_IDIV);
- MmioWrite32 (UartBase + UARTFBRD, UART_38400_FDIV);
- } else if (BaudRate == 19200) {
- // Initialize baud rate generator
- MmioWrite32 (UartBase + UARTIBRD, UART_19200_IDIV);
- MmioWrite32 (UartBase + UARTFBRD, UART_19200_FDIV);
- } else {
- return EFI_INVALID_PARAMETER;
- }
-
- // No parity, 1 stop, no fifo, 8 data bits
- MmioWrite32 (UartBase + UARTLCR_H, LineControl);
-
- // Clear any pending errors
- MmioWrite32 (UartBase + UARTECR, 0);
-
- // Enable tx, rx, and uart overall
- MmioWrite32 (UartBase + UARTCR, PL011_UARTCR_RXE | PL011_UARTCR_TXE | PL011_UARTCR_UARTEN);
-
- return EFI_SUCCESS;
-}
-
-/**
- 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
-PL011UartWrite (
- IN UINTN UartBase,
- IN UINT8 *Buffer,
- IN UINTN NumberOfBytes
- )
-{
- UINTN Count;
-
- for (Count = 0; Count < NumberOfBytes; Count++, Buffer++) {
- while ((MmioRead32 (UartBase + UARTFR) & UART_TX_EMPTY_FLAG_MASK) == 0);
- MmioWrite8 (UartBase + UARTDR, *Buffer);
- }
-
- return 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
-PL011UartRead (
- IN UINTN UartBase,
- OUT UINT8 *Buffer,
- IN UINTN NumberOfBytes
- )
-{
- UINTN Count;
-
- for (Count = 0; Count < NumberOfBytes; Count++, Buffer++) {
- while ((MmioRead32 (UartBase + UARTFR) & UART_RX_EMPTY_FLAG_MASK) != 0);
- *Buffer = MmioRead8 (UartBase + UARTDR);
- }
-
- return NumberOfBytes;
-}
-
-/**
- Check to see if any data is available to be read from the debug device.
-
- @retval EFI_SUCCESS At least one byte of data is available to be read
- @retval EFI_NOT_READY No data is available to be read
- @retval EFI_DEVICE_ERROR The serial device is not functioning properly
-
-**/
-BOOLEAN
-EFIAPI
-PL011UartPoll (
- IN UINTN UartBase
- )
-{
- return ((MmioRead32 (UartBase + UARTFR) & UART_RX_EMPTY_FLAG_MASK) == 0);
-}
+/** @file\r
+ Serial I/O Port library functions with no library constructor/destructor\r
+\r
+ Copyright (c) 2008 - 2010, Apple Inc. All rights reserved.<BR>\r
+ Copyright (c) 2011 - 2012, ARM Ltd. All rights reserved.<BR>\r
+ \r
+ This program and the accompanying materials\r
+ are licensed and made available under the terms and conditions of the BSD License\r
+ which accompanies this distribution. The full text of the license may be found at\r
+ http://opensource.org/licenses/bsd-license.php\r
+\r
+ THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
+ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
+\r
+**/\r
+\r
+#include <Library/DebugLib.h>\r
+#include <Library/IoLib.h>\r
+#include <Library/PcdLib.h>\r
+\r
+#include <Drivers/PL011Uart.h>\r
+\r
+/*\r
+\r
+ Initialise the serial port to the specified settings.\r
+ All unspecified settings will be set to the default values.\r
+\r
+ @return Always return EFI_SUCCESS or EFI_INVALID_PARAMETER.\r
+\r
+**/\r
+RETURN_STATUS\r
+EFIAPI\r
+PL011UartInitializePort (\r
+ IN UINTN UartBase,\r
+ IN UINT64 BaudRate,\r
+ IN UINT32 ReceiveFifoDepth,\r
+ IN UINT32 Timeout,\r
+ IN EFI_PARITY_TYPE Parity,\r
+ IN UINT8 DataBits,\r
+ IN EFI_STOP_BITS_TYPE StopBits\r
+ )\r
+{\r
+ UINT32 LineControl;\r
+ UINT32 Divisor;\r
+\r
+ // The BaudRate must be passed\r
+ if (BaudRate == 0) {\r
+ return RETURN_INVALID_PARAMETER;\r
+ }\r
+ \r
+ LineControl = 0;\r
+\r
+ // The PL011 supports a buffer of either 1 or 32 chars. Therefore we can accept\r
+ // 1 char buffer as the minimum fifo size. Because everything can be rounded down,\r
+ // there is no maximum fifo size.\r
+ if (ReceiveFifoDepth == 0) {\r
+ LineControl |= PL011_UARTLCR_H_FEN;\r
+ } else if (ReceiveFifoDepth < 32) {\r
+ // Nothing else to do. 1 byte fifo is default.\r
+ } else if (ReceiveFifoDepth >= 32) {\r
+ LineControl |= PL011_UARTLCR_H_FEN;\r
+ }\r
+\r
+ //\r
+ // Parity\r
+ //\r
+ switch (Parity) {\r
+ case DefaultParity:\r
+ case NoParity:\r
+ // Nothing to do. Parity is disabled by default.\r
+ break;\r
+ case EvenParity:\r
+ LineControl |= (PL011_UARTLCR_H_PEN | PL011_UARTLCR_H_EPS);\r
+ break;\r
+ case OddParity:\r
+ LineControl |= PL011_UARTLCR_H_PEN;\r
+ break;\r
+ case MarkParity:\r
+ LineControl |= (PL011_UARTLCR_H_PEN | PL011_UARTLCR_H_SPS | PL011_UARTLCR_H_EPS);\r
+ break;\r
+ case SpaceParity:\r
+ LineControl |= (PL011_UARTLCR_H_PEN | PL011_UARTLCR_H_SPS);\r
+ break;\r
+ default:\r
+ return RETURN_INVALID_PARAMETER;\r
+ }\r
+\r
+ //\r
+ // Data Bits\r
+ //\r
+ switch (DataBits) {\r
+ case 0:\r
+ case 8:\r
+ LineControl |= PL011_UARTLCR_H_WLEN_8;\r
+ break;\r
+ case 7:\r
+ LineControl |= PL011_UARTLCR_H_WLEN_7;\r
+ break;\r
+ case 6:\r
+ LineControl |= PL011_UARTLCR_H_WLEN_6;\r
+ break;\r
+ case 5:\r
+ LineControl |= PL011_UARTLCR_H_WLEN_5;\r
+ break;\r
+ default:\r
+ return RETURN_INVALID_PARAMETER;\r
+ }\r
+\r
+ //\r
+ // Stop Bits\r
+ //\r
+ switch (StopBits) {\r
+ case DefaultStopBits:\r
+ case OneStopBit:\r
+ // Nothing to do. One stop bit is enabled by default.\r
+ break;\r
+ case TwoStopBits:\r
+ LineControl |= PL011_UARTLCR_H_STP2;\r
+ break;\r
+ case OneFiveStopBits:\r
+ // Only 1 or 2 stops bits are supported\r
+ default:\r
+ return RETURN_INVALID_PARAMETER;\r
+ }\r
+ \r
+ // Don't send the LineControl value to the PL011 yet,\r
+ // wait until after the Baud Rate setting.\r
+ // This ensures we do not mess up the UART settings halfway through\r
+ // in the rare case when there is an error with the Baud Rate.\r
+\r
+ //\r
+ // Baud Rate\r
+ //\r
+ if (PcdGet32(PL011UartInteger) != 0) {\r
+ // Integer and Factional part must be different of 0\r
+ ASSERT(PcdGet32(PL011UartFractional) != 0);\r
+ \r
+ MmioWrite32 (UartBase + UARTIBRD, PcdGet32(PL011UartInteger));\r
+ MmioWrite32 (UartBase + UARTFBRD, PcdGet32(PL011UartFractional));\r
+ } else {\r
+ Divisor = (PcdGet32 (PL011UartClkInHz) * 4) / BaudRate;\r
+ MmioWrite32 (UartBase + UARTIBRD, Divisor >> 6);\r
+ MmioWrite32 (UartBase + UARTFBRD, Divisor & 0x3F);\r
+ }\r
+\r
+ // No parity, 1 stop, no fifo, 8 data bits\r
+ MmioWrite32 (UartBase + UARTLCR_H, LineControl);\r
+\r
+ // Clear any pending errors\r
+ MmioWrite32 (UartBase + UARTECR, 0);\r
+\r
+ // Enable tx, rx, and uart overall\r
+ MmioWrite32 (UartBase + UARTCR, PL011_UARTCR_RXE | PL011_UARTCR_TXE | PL011_UARTCR_UARTEN);\r
+\r
+ return RETURN_SUCCESS;\r
+}\r
+\r
+/**\r
+ Set the serial device control bits.\r
+\r
+ @param UartBase The base address of the PL011 UART.\r
+ @param Control Control bits which are to be set on the serial device.\r
+\r
+ @retval EFI_SUCCESS The new control bits were set on the serial device.\r
+ @retval EFI_UNSUPPORTED The serial device does not support this operation.\r
+ @retval EFI_DEVICE_ERROR The serial device is not functioning correctly.\r
+\r
+**/\r
+RETURN_STATUS\r
+EFIAPI\r
+PL011UartSetControl (\r
+ IN UINTN UartBase,\r
+ IN UINT32 Control\r
+ )\r
+{\r
+ UINT32 Bits;\r
+ UINT32 ValidControlBits;\r
+\r
+ ValidControlBits = ( EFI_SERIAL_REQUEST_TO_SEND\r
+ | EFI_SERIAL_DATA_TERMINAL_READY\r
+ // | EFI_SERIAL_HARDWARE_LOOPBACK_ENABLE // Not implemented yet.\r
+ // | EFI_SERIAL_SOFTWARE_LOOPBACK_ENABLE // Not implemented yet.\r
+ | EFI_SERIAL_HARDWARE_FLOW_CONTROL_ENABLE\r
+ );\r
+\r
+ if (Control & (~ValidControlBits)) {\r
+ return EFI_UNSUPPORTED;\r
+ }\r
+\r
+ Bits = MmioRead32 (UartBase + UARTCR);\r
+\r
+ if (Control & EFI_SERIAL_REQUEST_TO_SEND) {\r
+ Bits |= PL011_UARTCR_RTS;\r
+ }\r
+\r
+ if (Control & EFI_SERIAL_DATA_TERMINAL_READY) {\r
+ Bits |= PL011_UARTCR_DTR;\r
+ }\r
+\r
+ if (Control & EFI_SERIAL_HARDWARE_LOOPBACK_ENABLE) {\r
+ Bits |= PL011_UARTCR_LBE;\r
+ }\r
+\r
+ if (Control & EFI_SERIAL_HARDWARE_FLOW_CONTROL_ENABLE) {\r
+ Bits |= (PL011_UARTCR_CTSEN & PL011_UARTCR_RTSEN);\r
+ }\r
+\r
+ MmioWrite32 (UartBase + UARTCR, Bits);\r
+\r
+ return RETURN_SUCCESS;\r
+}\r
+\r
+/**\r
+ Get the serial device control bits.\r
+\r
+ @param UartBase The base address of the PL011 UART.\r
+ @param Control Control signals read from the serial device.\r
+\r
+ @retval EFI_SUCCESS The control bits were read from the serial device.\r
+ @retval EFI_DEVICE_ERROR The serial device is not functioning correctly.\r
+\r
+**/\r
+RETURN_STATUS\r
+EFIAPI\r
+PL011UartGetControl (\r
+ IN UINTN UartBase,\r
+ OUT UINT32 *Control\r
+ )\r
+{\r
+ UINT32 FlagRegister;\r
+ UINT32 ControlRegister;\r
+\r
+\r
+ FlagRegister = MmioRead32 (UartBase + UARTFR);\r
+ ControlRegister = MmioRead32 (UartBase + UARTCR);\r
+\r
+ *Control = 0;\r
+\r
+ if ((FlagRegister & PL011_UARTFR_CTS) == PL011_UARTFR_CTS) {\r
+ *Control |= EFI_SERIAL_CLEAR_TO_SEND;\r
+ }\r
+\r
+ if ((FlagRegister & PL011_UARTFR_DSR) == PL011_UARTFR_DSR) {\r
+ *Control |= EFI_SERIAL_DATA_SET_READY;\r
+ }\r
+\r
+ if ((FlagRegister & PL011_UARTFR_RI) == PL011_UARTFR_RI) {\r
+ *Control |= EFI_SERIAL_RING_INDICATE;\r
+ }\r
+\r
+ if ((FlagRegister & PL011_UARTFR_DCD) == PL011_UARTFR_DCD) {\r
+ *Control |= EFI_SERIAL_CARRIER_DETECT;\r
+ }\r
+\r
+ if ((ControlRegister & PL011_UARTCR_RTS) == PL011_UARTCR_RTS) {\r
+ *Control |= EFI_SERIAL_REQUEST_TO_SEND;\r
+ }\r
+\r
+ if ((ControlRegister & PL011_UARTCR_DTR) == PL011_UARTCR_DTR) {\r
+ *Control |= EFI_SERIAL_DATA_TERMINAL_READY;\r
+ }\r
+\r
+ if ((FlagRegister & PL011_UARTFR_RXFE) == PL011_UARTFR_RXFE) {\r
+ *Control |= EFI_SERIAL_INPUT_BUFFER_EMPTY;\r
+ }\r
+\r
+ if ((FlagRegister & PL011_UARTFR_TXFE) == PL011_UARTFR_TXFE) {\r
+ *Control |= EFI_SERIAL_OUTPUT_BUFFER_EMPTY;\r
+ }\r
+\r
+ if ((ControlRegister & (PL011_UARTCR_CTSEN | PL011_UARTCR_RTSEN)) == (PL011_UARTCR_CTSEN | PL011_UARTCR_RTSEN)) {\r
+ *Control |= EFI_SERIAL_HARDWARE_FLOW_CONTROL_ENABLE;\r
+ }\r
+\r
+#ifdef NEVER\r
+ // ToDo: Implement EFI_SERIAL_HARDWARE_LOOPBACK_ENABLE\r
+ if ((ControlRegister & PL011_UARTCR_LBE) == PL011_UARTCR_LBE) {\r
+ *Control |= EFI_SERIAL_HARDWARE_LOOPBACK_ENABLE;\r
+ }\r
+\r
+ // ToDo: Implement EFI_SERIAL_SOFTWARE_LOOPBACK_ENABLE\r
+ if (SoftwareLoopbackEnable) {\r
+ *Control |= EFI_SERIAL_SOFTWARE_LOOPBACK_ENABLE;\r
+ }\r
+#endif\r
+\r
+ return RETURN_SUCCESS;\r
+}\r
+\r
+/**\r
+ Write data to serial device.\r
+\r
+ @param Buffer Point of data buffer which need to be written.\r
+ @param NumberOfBytes Number of output bytes which are cached in Buffer.\r
+\r
+ @retval 0 Write data failed.\r
+ @retval !0 Actual number of bytes written to serial device.\r
+\r
+**/\r
+UINTN\r
+EFIAPI\r
+PL011UartWrite (\r
+ IN UINTN UartBase,\r
+ IN UINT8 *Buffer,\r
+ IN UINTN NumberOfBytes\r
+ )\r
+{\r
+ UINTN Count;\r
+\r
+ for (Count = 0; Count < NumberOfBytes; Count++, Buffer++) {\r
+ while ((MmioRead32 (UartBase + UARTFR) & UART_TX_EMPTY_FLAG_MASK) == 0);\r
+ MmioWrite8 (UartBase + UARTDR, *Buffer);\r
+ }\r
+\r
+ return NumberOfBytes;\r
+}\r
+\r
+/**\r
+ Read data from serial device and save the data in buffer.\r
+\r
+ @param Buffer Point of data buffer which need to be written.\r
+ @param NumberOfBytes Number of output bytes which are cached in Buffer.\r
+\r
+ @retval 0 Read data failed.\r
+ @retval !0 Actual number of bytes read from serial device.\r
+\r
+**/\r
+UINTN\r
+EFIAPI\r
+PL011UartRead (\r
+ IN UINTN UartBase,\r
+ OUT UINT8 *Buffer,\r
+ IN UINTN NumberOfBytes\r
+ )\r
+{\r
+ UINTN Count;\r
+\r
+ for (Count = 0; Count < NumberOfBytes; Count++, Buffer++) {\r
+ while ((MmioRead32 (UartBase + UARTFR) & UART_RX_EMPTY_FLAG_MASK) != 0);\r
+ *Buffer = MmioRead8 (UartBase + UARTDR);\r
+ }\r
+\r
+ return NumberOfBytes;\r
+}\r
+\r
+/**\r
+ Check to see if any data is available to be read from the debug device.\r
+\r
+ @retval EFI_SUCCESS At least one byte of data is available to be read\r
+ @retval EFI_NOT_READY No data is available to be read\r
+ @retval EFI_DEVICE_ERROR The serial device is not functioning properly\r
+\r
+**/\r
+BOOLEAN\r
+EFIAPI\r
+PL011UartPoll (\r
+ IN UINTN UartBase\r
+ )\r
+{\r
+ return ((MmioRead32 (UartBase + UARTFR) & UART_RX_EMPTY_FLAG_MASK) == 0);\r
+}\r
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