diff options
Diffstat (limited to 'CorebootPayloadPkg/Library/SerialPortLib/SerialPortLib.c')
| -rw-r--r-- | CorebootPayloadPkg/Library/SerialPortLib/SerialPortLib.c | 316 |
1 files changed, 0 insertions, 316 deletions
diff --git a/CorebootPayloadPkg/Library/SerialPortLib/SerialPortLib.c b/CorebootPayloadPkg/Library/SerialPortLib/SerialPortLib.c deleted file mode 100644 index 0d87e62b1..000000000 --- a/CorebootPayloadPkg/Library/SerialPortLib/SerialPortLib.c +++ /dev/null @@ -1,316 +0,0 @@ -/** @file
- SerialPortLib instance for UART device upon coreboot
-
- Copyright (c) 2014, Intel Corporation. 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 <Uefi/UefiBaseType.h>
-#include <Library/SerialPortLib.h>
-#include <Library/PcdLib.h>
-#include <Library/IoLib.h>
-#include <Library/CbParseLib.h>
-
-//
-// 16550 UART register offsets and bitfields
-//
-#define R_UART_RXBUF 0
-#define R_UART_TXBUF 0
-#define R_UART_BAUD_LOW 0
-#define R_UART_BAUD_HIGH 1
-#define R_UART_FCR 2
-#define B_UART_FCR_FIFOE BIT0
-#define B_UART_FCR_FIFO64 BIT5
-#define R_UART_LCR 3
-#define B_UART_LCR_DLAB BIT7
-#define R_UART_MCR 4
-#define B_UART_MCR_RTS BIT1
-#define R_UART_LSR 5
-#define B_UART_LSR_RXRDY BIT0
-#define B_UART_LSR_TXRDY BIT5
-#define B_UART_LSR_TEMT BIT6
-#define R_UART_MSR 6
-#define B_UART_MSR_CTS BIT4
-#define B_UART_MSR_DSR BIT5
-
-UINT32 mSerialRegBase = 0;
-UINT32 mSerialRegAccessType = 0;
-
-/**
- Read an 8-bit 16550 register. If PcdSerialUseMmio is TRUE, then the value is read from
- MMIO space. If PcdSerialUseMmio is FALSE, then the value is read from I/O space. The
- parameter Offset is added to the base address of the 16550 registers that is specified
- by PcdSerialRegisterBase.
-
- @param Offset The offset of the 16550 register to read.
-
- @return The value read from the 16550 register.
-
-**/
-UINT8
-SerialPortReadRegister (
- UINTN Offset
- )
-{
- if (mSerialRegAccessType == 2) { //MMIO
- return MmioRead8 (mSerialRegBase + Offset);
- } else { //IO
- return IoRead8 ((UINT16)mSerialRegBase + Offset);
- }
-}
-
-/**
- Write an 8-bit 16550 register. If PcdSerialUseMmio is TRUE, then the value is written to
- MMIO space. If PcdSerialUseMmio is FALSE, then the value is written to I/O space. The
- parameter Offset is added to the base address of the 16550 registers that is specified
- by PcdSerialRegisterBase.
-
- @param Offset The offset of the 16550 register to write.
- @param Value The value to write to the 16550 register specified by Offset.
-
- @return The value written to the 16550 register.
-
-**/
-UINT8
-SerialPortWriteRegister (
- UINTN Offset,
- UINT8 Value
- )
-{
- if (mSerialRegAccessType == 2) { //MMIO
- return MmioWrite8 (mSerialRegBase + Offset, Value);
- } else {// IO
- return IoWrite8 ((UINT16)mSerialRegBase + Offset, Value);
- }
-}
-
-/**
- Initialize the serial device hardware.
-
- If no initialization is required, then return RETURN_SUCCESS.
- If the serial device was successfully 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 serial device could not be initialized.
-
-**/
-RETURN_STATUS
-EFIAPI
-SerialPortInitialize (
- VOID
- )
-{
- RETURN_STATUS Status;
- UINTN Divisor;
- BOOLEAN Initialized;
-
- Status = CbParseSerialInfo (&mSerialRegBase, &mSerialRegAccessType, NULL);
- if (RETURN_ERROR (Status)) {
- return Status;
- }
-
- //
- // See if the serial port is already initialized
- //
- Initialized = TRUE;
- if ((SerialPortReadRegister (R_UART_FCR) & (B_UART_FCR_FIFOE | B_UART_FCR_FIFO64)) !=
- (PcdGet8 (PcdSerialFifoControl) & (B_UART_FCR_FIFOE | B_UART_FCR_FIFO64)) ) {
- Initialized = FALSE;
- }
-
- if ((SerialPortReadRegister (R_UART_LCR) & 0x3F) != (PcdGet8 (PcdSerialLineControl) & 0x3F)) {
- Initialized = FALSE;
- }
- SerialPortWriteRegister (R_UART_LCR, (UINT8)(SerialPortReadRegister (R_UART_LCR) | B_UART_LCR_DLAB));
- Divisor = SerialPortReadRegister (R_UART_BAUD_HIGH) << 8;
- Divisor |= SerialPortReadRegister (R_UART_BAUD_LOW);
- SerialPortWriteRegister (R_UART_LCR, (UINT8)(SerialPortReadRegister (R_UART_LCR) & ~B_UART_LCR_DLAB));
- if (Divisor != 115200 / PcdGet32 (PcdSerialBaudRate)) {
- Initialized = FALSE;
- }
- if (Initialized) {
- return RETURN_SUCCESS;
- }
-
- //
- // Configure baud rate
- //
- Divisor = 115200 / PcdGet32 (PcdSerialBaudRate);
- SerialPortWriteRegister (R_UART_LCR, B_UART_LCR_DLAB);
- SerialPortWriteRegister (R_UART_BAUD_HIGH, (UINT8) (Divisor >> 8));
- SerialPortWriteRegister (R_UART_BAUD_LOW, (UINT8) (Divisor & 0xff));
-
- //
- // Clear DLAB and configure Data Bits, Parity, and Stop Bits.
- // Strip reserved bits from PcdSerialLineControl
- //
- SerialPortWriteRegister (R_UART_LCR, (UINT8)(PcdGet8 (PcdSerialLineControl) & 0x3F));
-
- //
- // Enable and reset FIFOs
- // Strip reserved bits from PcdSerialFifoControl
- //
- SerialPortWriteRegister (R_UART_FCR, (UINT8)(PcdGet8 (PcdSerialFifoControl) & 0x27));
-
- //
- // Put Modem Control Register(MCR) into its reset state of 0x00.
- //
- SerialPortWriteRegister (R_UART_MCR, 0x00);
-
- return RETURN_SUCCESS;
-}
-
-/**
- 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;
- UINTN Index;
- UINTN FifoSize;
-
- if (Buffer == NULL) {
- return 0;
- }
-
- if (NumberOfBytes == 0) {
- //
- // Flush the hardware
- //
-
- //
- // Wait for both the transmit FIFO and shift register empty.
- //
- while ((SerialPortReadRegister (R_UART_LSR) & B_UART_LSR_TEMT) == 0);
-
- return 0;
- }
-
- //
- // Compute the maximum size of the Tx FIFO
- //
- FifoSize = 1;
- if ((PcdGet8 (PcdSerialFifoControl) & B_UART_FCR_FIFOE) != 0) {
- if ((PcdGet8 (PcdSerialFifoControl) & B_UART_FCR_FIFO64) == 0) {
- FifoSize = 16;
- } else {
- FifoSize = 64;
- }
- }
-
- Result = NumberOfBytes;
- while (NumberOfBytes != 0) {
- //
- // Wait for the serial port to be ready, to make sure both the transmit FIFO
- // and shift register empty.
- //
- while ((SerialPortReadRegister (R_UART_LSR) & B_UART_LSR_TEMT) == 0);
-
- //
- // Fill then entire Tx FIFO
- //
- for (Index = 0; Index < FifoSize && NumberOfBytes != 0; Index++, NumberOfBytes--, Buffer++) {
-
- //
- // Write byte to the transmit buffer.
- //
- SerialPortWriteRegister (R_UART_TXBUF, *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;
- }
-
- for (Result = 0; NumberOfBytes-- != 0; Result++, Buffer++) {
- //
- // Wait for the serial port to have some data.
- //
- while ((SerialPortReadRegister (R_UART_LSR) & B_UART_LSR_RXRDY) == 0);
-
- //
- // Read byte from the receive buffer.
- //
- *Buffer = SerialPortReadRegister (R_UART_RXBUF);
- }
-
- 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
- )
-{
- //
- // Read the serial port status
- //
- if ((SerialPortReadRegister (R_UART_LSR) & B_UART_LSR_RXRDY) != 0) {
- return TRUE;
- }
-
- return FALSE;
-}
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