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Diffstat (limited to 'CorebootModulePkg/SerialDxe/SerialIo.c')
| -rw-r--r-- | CorebootModulePkg/SerialDxe/SerialIo.c | 528 |
1 files changed, 528 insertions, 0 deletions
diff --git a/CorebootModulePkg/SerialDxe/SerialIo.c b/CorebootModulePkg/SerialDxe/SerialIo.c new file mode 100644 index 0000000000..380e19b734 --- /dev/null +++ b/CorebootModulePkg/SerialDxe/SerialIo.c @@ -0,0 +1,528 @@ +/** @file + Serial driver that layers on top of a Serial Port Library instance. + + Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR> + Copyright (c) 2013-2014, ARM Ltd. All rights reserved.<BR> + Copyright (c) 2015, 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 <Library/UefiBootServicesTableLib.h> +#include <Library/SerialPortLib.h> +#include <Library/DebugLib.h> +#include <Library/PcdLib.h> +#include <Protocol/SerialIo.h> +#include <Protocol/DevicePath.h> + +typedef struct { + VENDOR_DEVICE_PATH Guid; + UART_DEVICE_PATH Uart; + EFI_DEVICE_PATH_PROTOCOL End; +} SERIAL_DEVICE_PATH; + +/** + Reset the serial device. + + @param This Protocol instance pointer. + + @retval EFI_SUCCESS The device was reset. + @retval EFI_DEVICE_ERROR The serial device could not be reset. + +**/ +EFI_STATUS +EFIAPI +SerialReset ( + IN EFI_SERIAL_IO_PROTOCOL *This + ); + +/** + Sets the baud rate, receive FIFO depth, transmit/receive time out, parity, + data bits, and stop bits on a serial device. + + @param This Protocol instance pointer. + @param BaudRate The requested baud rate. A BaudRate value of 0 will use the the + device's default interface speed. + @param ReceiveFifoDepth 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. + @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. + @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. + @param DataBits The number of data bits to use on the serial device. A DataBits + value of 0 will use the device's default data bit setting. + @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. + + @retval EFI_SUCCESS The device was reset. + @retval EFI_DEVICE_ERROR The serial device could not be reset. + +**/ +EFI_STATUS +EFIAPI +SerialSetAttributes ( + IN EFI_SERIAL_IO_PROTOCOL *This, + IN UINT64 BaudRate, + IN UINT32 ReceiveFifoDepth, + IN UINT32 Timeout, + IN EFI_PARITY_TYPE Parity, + IN UINT8 DataBits, + IN EFI_STOP_BITS_TYPE StopBits + ); + +/** + Set the control bits on a serial device + + @param This Protocol instance pointer. + @param Control Set the bits of Control that are settable. + + @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. + +**/ +EFI_STATUS +EFIAPI +SerialSetControl ( + IN EFI_SERIAL_IO_PROTOCOL *This, + IN UINT32 Control + ); + +/** + Retrieves the status of the control bits on a serial device + + @param This Protocol instance pointer. + @param Control A pointer to return the current Control signals 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. + +**/ +EFI_STATUS +EFIAPI +SerialGetControl ( + IN EFI_SERIAL_IO_PROTOCOL *This, + OUT UINT32 *Control + ); + +/** + Writes data to a serial device. + + @param This Protocol instance pointer. + @param BufferSize On input, the size of the Buffer. On output, the amount of + data actually written. + @param Buffer The buffer of data to write + + @retval EFI_SUCCESS The data was written. + @retval EFI_DEVICE_ERROR The device reported an error. + @retval EFI_TIMEOUT The data write was stopped due to a timeout. + +**/ +EFI_STATUS +EFIAPI +SerialWrite ( + IN EFI_SERIAL_IO_PROTOCOL *This, + IN OUT UINTN *BufferSize, + IN VOID *Buffer + ); + +/** + Reads data from a serial device. + + @param This Protocol instance pointer. + @param BufferSize On input, the size of the Buffer. On output, the amount of + data returned in Buffer. + @param Buffer The buffer to return the data into. + + @retval EFI_SUCCESS The data was read. + @retval EFI_DEVICE_ERROR The device reported an error. + @retval EFI_TIMEOUT The data write was stopped due to a timeout. + +**/ +EFI_STATUS +EFIAPI +SerialRead ( + IN EFI_SERIAL_IO_PROTOCOL *This, + IN OUT UINTN *BufferSize, + OUT VOID *Buffer + ); + +EFI_HANDLE mSerialHandle = NULL; + +SERIAL_DEVICE_PATH mSerialDevicePath = { + { + { HARDWARE_DEVICE_PATH, HW_VENDOR_DP, { sizeof (VENDOR_DEVICE_PATH), 0} }, + EFI_CALLER_ID_GUID // Use the driver's GUID + }, + { + { MESSAGING_DEVICE_PATH, MSG_UART_DP, { sizeof (UART_DEVICE_PATH), 0} }, + 0, // Reserved + 0, // BaudRate + 0, // DataBits + 0, // Parity + 0 // StopBits + }, + { END_DEVICE_PATH_TYPE, END_ENTIRE_DEVICE_PATH_SUBTYPE, { sizeof (EFI_DEVICE_PATH_PROTOCOL), 0 } } +}; + +// +// Template used to initialize the Serial IO protocols. +// +EFI_SERIAL_IO_MODE mSerialIoMode = { + // + // value field set in SerialDxeInitialize()? + //--------- ------------------- ----------------------------- + 0, // ControlMask + 1000 * 1000, // Timeout + 0, // BaudRate yes + 1, // ReceiveFifoDepth + 0, // DataBits yes + 0, // Parity yes + 0 // StopBits yes +}; + +EFI_SERIAL_IO_PROTOCOL mSerialIoTemplate = { + SERIAL_IO_INTERFACE_REVISION, + SerialReset, + SerialSetAttributes, + SerialSetControl, + SerialGetControl, + SerialWrite, + SerialRead, + &mSerialIoMode +}; + +/** + Reset the serial device. + + @param This Protocol instance pointer. + + @retval EFI_SUCCESS The device was reset. + @retval EFI_DEVICE_ERROR The serial device could not be reset. + +**/ +EFI_STATUS +EFIAPI +SerialReset ( + IN EFI_SERIAL_IO_PROTOCOL *This + ) +{ + EFI_STATUS Status; + EFI_TPL Tpl; + + Status = SerialPortInitialize (); + if (EFI_ERROR (Status)) { + return Status; + } + + // + // Set the Serial I/O mode and update the device path + // + + Tpl = gBS->RaiseTPL (TPL_NOTIFY); + + // + // Set the Serial I/O mode + // + This->Mode->ReceiveFifoDepth = 1; + This->Mode->Timeout = 1000 * 1000; + This->Mode->BaudRate = PcdGet64 (PcdUartDefaultBaudRate); + This->Mode->DataBits = (UINT32) PcdGet8 (PcdUartDefaultDataBits); + This->Mode->Parity = (UINT32) PcdGet8 (PcdUartDefaultParity); + This->Mode->StopBits = (UINT32) PcdGet8 (PcdUartDefaultStopBits); + + // + // Check if the device path has actually changed + // + if (mSerialDevicePath.Uart.BaudRate == This->Mode->BaudRate && + mSerialDevicePath.Uart.DataBits == (UINT8) This->Mode->DataBits && + mSerialDevicePath.Uart.Parity == (UINT8) This->Mode->Parity && + mSerialDevicePath.Uart.StopBits == (UINT8) This->Mode->StopBits + ) { + gBS->RestoreTPL (Tpl); + return EFI_SUCCESS; + } + + // + // Update the device path + // + mSerialDevicePath.Uart.BaudRate = This->Mode->BaudRate; + mSerialDevicePath.Uart.DataBits = (UINT8) This->Mode->DataBits; + mSerialDevicePath.Uart.Parity = (UINT8) This->Mode->Parity; + mSerialDevicePath.Uart.StopBits = (UINT8) This->Mode->StopBits; + + Status = gBS->ReinstallProtocolInterface ( + mSerialHandle, + &gEfiDevicePathProtocolGuid, + &mSerialDevicePath, + &mSerialDevicePath + ); + + gBS->RestoreTPL (Tpl); + + return Status; +} + +/** + Sets the baud rate, receive FIFO depth, transmit/receive time out, parity, + data bits, and stop bits on a serial device. + + @param This Protocol instance pointer. + @param BaudRate The requested baud rate. A BaudRate value of 0 will use the the + device's default interface speed. + @param ReceiveFifoDepth 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. + @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. + @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. + @param DataBits The number of data bits to use on the serial device. A DataBits + value of 0 will use the device's default data bit setting. + @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. + + @retval EFI_SUCCESS The device was reset. + @retval EFI_DEVICE_ERROR The serial device could not be reset. + +**/ +EFI_STATUS +EFIAPI +SerialSetAttributes ( + IN EFI_SERIAL_IO_PROTOCOL *This, + IN UINT64 BaudRate, + IN UINT32 ReceiveFifoDepth, + IN UINT32 Timeout, + IN EFI_PARITY_TYPE Parity, + IN UINT8 DataBits, + IN EFI_STOP_BITS_TYPE StopBits + ) +{ + EFI_STATUS Status; + EFI_TPL Tpl; + + Status = SerialPortSetAttributes (&BaudRate, &ReceiveFifoDepth, &Timeout, &Parity, &DataBits, &StopBits); + if (EFI_ERROR (Status)) { + return Status; + } + + // + // Set the Serial I/O mode and update the device path + // + + Tpl = gBS->RaiseTPL (TPL_NOTIFY); + + // + // Set the Serial I/O mode + // + This->Mode->ReceiveFifoDepth = ReceiveFifoDepth; + This->Mode->Timeout = Timeout; + This->Mode->BaudRate = BaudRate; + This->Mode->DataBits = (UINT32) DataBits; + This->Mode->Parity = (UINT32) Parity; + This->Mode->StopBits = (UINT32) StopBits; + + // + // Check if the device path has actually changed + // + if (mSerialDevicePath.Uart.BaudRate == BaudRate && + mSerialDevicePath.Uart.DataBits == DataBits && + mSerialDevicePath.Uart.Parity == (UINT8) Parity && + mSerialDevicePath.Uart.StopBits == (UINT8) StopBits + ) { + gBS->RestoreTPL (Tpl); + return EFI_SUCCESS; + } + + // + // Update the device path + // + mSerialDevicePath.Uart.BaudRate = BaudRate; + mSerialDevicePath.Uart.DataBits = DataBits; + mSerialDevicePath.Uart.Parity = (UINT8) Parity; + mSerialDevicePath.Uart.StopBits = (UINT8) StopBits; + + Status = gBS->ReinstallProtocolInterface ( + mSerialHandle, + &gEfiDevicePathProtocolGuid, + &mSerialDevicePath, + &mSerialDevicePath + ); + + gBS->RestoreTPL (Tpl); + + return Status; +} + +/** + Set the control bits on a serial device + + @param This Protocol instance pointer. + @param Control Set the bits of Control that are settable. + + @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. + +**/ +EFI_STATUS +EFIAPI +SerialSetControl ( + IN EFI_SERIAL_IO_PROTOCOL *This, + IN UINT32 Control + ) +{ + return SerialPortSetControl (Control); +} + +/** + Retrieves the status of the control bits on a serial device + + @param This Protocol instance pointer. + @param Control A pointer to return the current Control signals 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. + +**/ +EFI_STATUS +EFIAPI +SerialGetControl ( + IN EFI_SERIAL_IO_PROTOCOL *This, + OUT UINT32 *Control + ) +{ + return SerialPortGetControl (Control); +} + +/** + Writes data to a serial device. + + @param This Protocol instance pointer. + @param BufferSize On input, the size of the Buffer. On output, the amount of + data actually written. + @param Buffer The buffer of data to write + + @retval EFI_SUCCESS The data was written. + @retval EFI_DEVICE_ERROR The device reported an error. + @retval EFI_TIMEOUT The data write was stopped due to a timeout. + +**/ +EFI_STATUS +EFIAPI +SerialWrite ( + IN EFI_SERIAL_IO_PROTOCOL *This, + IN OUT UINTN *BufferSize, + IN VOID *Buffer + ) +{ + UINTN Count; + + Count = SerialPortWrite (Buffer, *BufferSize); + + if (Count != *BufferSize) { + *BufferSize = Count; + return EFI_TIMEOUT; + } + + return EFI_SUCCESS; +} + +/** + Reads data from a serial device. + + @param This Protocol instance pointer. + @param BufferSize On input, the size of the Buffer. On output, the amount of + data returned in Buffer. + @param Buffer The buffer to return the data into. + + @retval EFI_SUCCESS The data was read. + @retval EFI_DEVICE_ERROR The device reported an error. + @retval EFI_TIMEOUT The data write was stopped due to a timeout. + +**/ +EFI_STATUS +EFIAPI +SerialRead ( + IN EFI_SERIAL_IO_PROTOCOL *This, + IN OUT UINTN *BufferSize, + OUT VOID *Buffer + ) +{ + UINTN Count; + + Count = 0; + + if (SerialPortPoll ()) { + Count = SerialPortRead (Buffer, *BufferSize); + } + + if (Count != *BufferSize) { + *BufferSize = Count; + return EFI_TIMEOUT; + } + + return EFI_SUCCESS; +} + +/** + Initialization for the Serial Io Protocol. + + @param[in] ImageHandle The firmware allocated handle for the EFI image. + @param[in] SystemTable A pointer to the EFI System Table. + + @retval EFI_SUCCESS The entry point is executed successfully. + @retval other Some error occurs when executing this entry point. + +**/ +EFI_STATUS +EFIAPI +SerialDxeInitialize ( + IN EFI_HANDLE ImageHandle, + IN EFI_SYSTEM_TABLE *SystemTable + ) +{ + EFI_STATUS Status; + + Status = SerialPortInitialize (); + if (EFI_ERROR (Status)) { + return Status; + } + + mSerialIoMode.BaudRate = PcdGet64 (PcdUartDefaultBaudRate); + mSerialIoMode.DataBits = (UINT32) PcdGet8 (PcdUartDefaultDataBits); + mSerialIoMode.Parity = (UINT32) PcdGet8 (PcdUartDefaultParity); + mSerialIoMode.StopBits = (UINT32) PcdGet8 (PcdUartDefaultStopBits); + mSerialDevicePath.Uart.BaudRate = PcdGet64 (PcdUartDefaultBaudRate); + mSerialDevicePath.Uart.DataBits = PcdGet8 (PcdUartDefaultDataBits); + mSerialDevicePath.Uart.Parity = PcdGet8 (PcdUartDefaultParity); + mSerialDevicePath.Uart.StopBits = PcdGet8 (PcdUartDefaultStopBits); + + // + // Make a new handle with Serial IO protocol and its device path on it. + // + Status = gBS->InstallMultipleProtocolInterfaces ( + &mSerialHandle, + &gEfiSerialIoProtocolGuid, &mSerialIoTemplate, + &gEfiDevicePathProtocolGuid, &mSerialDevicePath, + NULL + ); + ASSERT_EFI_ERROR (Status); + + return Status; +} + |