| /** @file | |
| Definitions and prototypes for DebugPort driver. | |
| Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR> | |
| SPDX-License-Identifier: BSD-2-Clause-Patent | |
| **/ | |
| #ifndef __DEBUGPORT_H__ | |
| #define __DEBUGPORT_H__ | |
| #include <Uefi.h> | |
| #include <Protocol/DevicePath.h> | |
| #include <Protocol/ComponentName.h> | |
| #include <Protocol/DriverBinding.h> | |
| #include <Protocol/SerialIo.h> | |
| #include <Protocol/DebugPort.h> | |
| #include <Library/DebugLib.h> | |
| #include <Library/UefiDriverEntryPoint.h> | |
| #include <Library/UefiLib.h> | |
| #include <Library/BaseMemoryLib.h> | |
| #include <Library/MemoryAllocationLib.h> | |
| #include <Library/UefiBootServicesTableLib.h> | |
| #include <Library/UefiRuntimeServicesTableLib.h> | |
| #include <Library/DevicePathLib.h> | |
| // | |
| // Driver Binding Externs | |
| // | |
| extern EFI_DRIVER_BINDING_PROTOCOL gDebugPortDriverBinding; | |
| extern EFI_COMPONENT_NAME_PROTOCOL gDebugPortComponentName; | |
| extern EFI_COMPONENT_NAME2_PROTOCOL gDebugPortComponentName2; | |
| // | |
| // local type definitions | |
| // | |
| #define DEBUGPORT_DEVICE_SIGNATURE SIGNATURE_32 ('D', 'B', 'G', 'P') | |
| // | |
| // Device structure used by driver | |
| // | |
| typedef struct { | |
| UINT32 Signature; | |
| EFI_HANDLE DriverBindingHandle; | |
| EFI_HANDLE DebugPortDeviceHandle; | |
| EFI_DEVICE_PATH_PROTOCOL *DebugPortDevicePath; | |
| EFI_DEBUGPORT_PROTOCOL DebugPortInterface; | |
| EFI_HANDLE SerialIoDeviceHandle; | |
| EFI_SERIAL_IO_PROTOCOL *SerialIoBinding; | |
| UINT64 BaudRate; | |
| UINT32 ReceiveFifoDepth; | |
| UINT32 Timeout; | |
| EFI_PARITY_TYPE Parity; | |
| UINT8 DataBits; | |
| EFI_STOP_BITS_TYPE StopBits; | |
| } DEBUGPORT_DEVICE; | |
| #define DEBUGPORT_DEVICE_FROM_THIS(a) CR (a, DEBUGPORT_DEVICE, DebugPortInterface, DEBUGPORT_DEVICE_SIGNATURE) | |
| #define EFI_ACPI_PC_COMPORT_HID EISA_PNP_ID (0x0500) | |
| #define EFI_ACPI_16550UART_HID EISA_PNP_ID (0x0501) | |
| #define DEBUGPORT_UART_DEFAULT_BAUDRATE 115200 | |
| #define DEBUGPORT_UART_DEFAULT_PARITY 0 | |
| #define DEBUGPORT_UART_DEFAULT_FIFO_DEPTH 16 | |
| #define DEBUGPORT_UART_DEFAULT_TIMEOUT 50000///< 5 ms | |
| #define DEBUGPORT_UART_DEFAULT_DATA_BITS 8 | |
| #define DEBUGPORT_UART_DEFAULT_STOP_BITS 1 | |
| #define DEBUGPORT_DRIVER_VERSION 1 | |
| #define IS_UART_DEVICEPATH(dp) (DevicePathType (dp) == MESSAGING_DEVICE_PATH && DevicePathSubType (dp) == MSG_UART_DP) | |
| /** | |
| Debug Port Driver entry point. | |
| Reads DebugPort variable to determine what device and settings to use as the | |
| debug port. Binds exclusively to SerialIo. Reverts to defaults if no variable | |
| is found. | |
| @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 EFI_OUT_OF_RESOURCES Fails to allocate memory for device. | |
| @retval other Some error occurs when executing this entry point. | |
| **/ | |
| EFI_STATUS | |
| EFIAPI | |
| InitializeDebugPortDriver ( | |
| IN EFI_HANDLE ImageHandle, | |
| IN EFI_SYSTEM_TABLE *SystemTable | |
| ); | |
| /** | |
| Checks to see if there's not already a DebugPort interface somewhere. | |
| If there's a DEBUGPORT variable, the device path must match exactly. If there's | |
| no DEBUGPORT variable, then device path is not checked and does not matter. | |
| Checks to see that there's a serial io interface on the controller handle | |
| that can be bound BY_DRIVER | EXCLUSIVE. | |
| If all these tests succeed, then we return EFI_SUCCESS, else, EFI_UNSUPPORTED | |
| or other error returned by OpenProtocol. | |
| @param This Protocol instance pointer. | |
| @param ControllerHandle Handle of device to test. | |
| @param RemainingDevicePath Optional parameter use to pick a specific child | |
| device to start. | |
| @retval EFI_SUCCESS This driver supports this device. | |
| @retval EFI_UNSUPPORTED Debug Port device is not supported. | |
| @retval EFI_OUT_OF_RESOURCES Fails to allocate memory for device. | |
| @retval others Some error occurs. | |
| **/ | |
| EFI_STATUS | |
| EFIAPI | |
| DebugPortSupported ( | |
| IN EFI_DRIVER_BINDING_PROTOCOL *This, | |
| IN EFI_HANDLE Controller, | |
| IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath | |
| ); | |
| /** | |
| Binds exclusively to serial io on the controller handle, Produces DebugPort | |
| protocol and DevicePath on new handle. | |
| @param This Protocol instance pointer. | |
| @param ControllerHandle Handle of device to bind driver to. | |
| @param RemainingDevicePath Optional parameter use to pick a specific child | |
| device to start. | |
| @retval EFI_SUCCESS This driver is added to ControllerHandle. | |
| @retval EFI_OUT_OF_RESOURCES Fails to allocate memory for device. | |
| @retval others Some error occurs. | |
| **/ | |
| EFI_STATUS | |
| EFIAPI | |
| DebugPortStart ( | |
| IN EFI_DRIVER_BINDING_PROTOCOL *This, | |
| IN EFI_HANDLE Controller, | |
| IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath | |
| ); | |
| /** | |
| Stop this driver on ControllerHandle by removing Serial IO protocol on | |
| the ControllerHandle. | |
| @param This Protocol instance pointer. | |
| @param ControllerHandle Handle of device to stop driver on | |
| @param NumberOfChildren Number of Handles in ChildHandleBuffer. If number of | |
| children is zero stop the entire bus driver. | |
| @param ChildHandleBuffer List of Child Handles to Stop. | |
| @retval EFI_SUCCESS This driver is removed ControllerHandle. | |
| @retval other This driver was not removed from this device. | |
| **/ | |
| EFI_STATUS | |
| EFIAPI | |
| DebugPortStop ( | |
| IN EFI_DRIVER_BINDING_PROTOCOL *This, | |
| IN EFI_HANDLE Controller, | |
| IN UINTN NumberOfChildren, | |
| IN EFI_HANDLE *ChildHandleBuffer | |
| ); | |
| // | |
| // EFI Component Name Functions | |
| // | |
| /** | |
| Retrieves a Unicode string that is the user readable name of the driver. | |
| This function retrieves the user readable name of a driver in the form of a | |
| Unicode string. If the driver specified by This has a user readable name in | |
| the language specified by Language, then a pointer to the driver name is | |
| returned in DriverName, and EFI_SUCCESS is returned. If the driver specified | |
| by This does not support the language specified by Language, | |
| then EFI_UNSUPPORTED is returned. | |
| @param This[in] A pointer to the EFI_COMPONENT_NAME2_PROTOCOL or | |
| EFI_COMPONENT_NAME_PROTOCOL instance. | |
| @param Language[in] A pointer to a Null-terminated ASCII string | |
| array indicating the language. This is the | |
| language of the driver name that the caller is | |
| requesting, and it must match one of the | |
| languages specified in SupportedLanguages. The | |
| number of languages supported by a driver is up | |
| to the driver writer. Language is specified | |
| in RFC 4646 or ISO 639-2 language code format. | |
| @param DriverName[out] A pointer to the Unicode string to return. | |
| This Unicode string is the name of the | |
| driver specified by This in the language | |
| specified by Language. | |
| @retval EFI_SUCCESS The Unicode string for the Driver specified by | |
| This and the language specified by Language was | |
| returned in DriverName. | |
| @retval EFI_INVALID_PARAMETER Language is NULL. | |
| @retval EFI_INVALID_PARAMETER DriverName is NULL. | |
| @retval EFI_UNSUPPORTED The driver specified by This does not support | |
| the language specified by Language. | |
| **/ | |
| EFI_STATUS | |
| EFIAPI | |
| DebugPortComponentNameGetDriverName ( | |
| IN EFI_COMPONENT_NAME_PROTOCOL *This, | |
| IN CHAR8 *Language, | |
| OUT CHAR16 **DriverName | |
| ); | |
| /** | |
| Retrieves a Unicode string that is the user readable name of the controller | |
| that is being managed by a driver. | |
| This function retrieves the user readable name of the controller specified by | |
| ControllerHandle and ChildHandle in the form of a Unicode string. If the | |
| driver specified by This has a user readable name in the language specified by | |
| Language, then a pointer to the controller name is returned in ControllerName, | |
| and EFI_SUCCESS is returned. If the driver specified by This is not currently | |
| managing the controller specified by ControllerHandle and ChildHandle, | |
| then EFI_UNSUPPORTED is returned. If the driver specified by This does not | |
| support the language specified by Language, then EFI_UNSUPPORTED is returned. | |
| @param This[in] A pointer to the EFI_COMPONENT_NAME2_PROTOCOL or | |
| EFI_COMPONENT_NAME_PROTOCOL instance. | |
| @param ControllerHandle[in] The handle of a controller that the driver | |
| specified by This is managing. This handle | |
| specifies the controller whose name is to be | |
| returned. | |
| @param ChildHandle[in] The handle of the child controller to retrieve | |
| the name of. This is an optional parameter that | |
| may be NULL. It will be NULL for device | |
| drivers. It will also be NULL for a bus drivers | |
| that wish to retrieve the name of the bus | |
| controller. It will not be NULL for a bus | |
| driver that wishes to retrieve the name of a | |
| child controller. | |
| @param Language[in] A pointer to a Null-terminated ASCII string | |
| array indicating the language. This is the | |
| language of the driver name that the caller is | |
| requesting, and it must match one of the | |
| languages specified in SupportedLanguages. The | |
| number of languages supported by a driver is up | |
| to the driver writer. Language is specified in | |
| RFC 4646 or ISO 639-2 language code format. | |
| @param ControllerName[out] A pointer to the Unicode string to return. | |
| This Unicode string is the name of the | |
| controller specified by ControllerHandle and | |
| ChildHandle in the language specified by | |
| Language from the point of view of the driver | |
| specified by This. | |
| @retval EFI_SUCCESS The Unicode string for the user readable name in | |
| the language specified by Language for the | |
| driver specified by This was returned in | |
| DriverName. | |
| @retval EFI_INVALID_PARAMETER ControllerHandle is NULL. | |
| @retval EFI_INVALID_PARAMETER ChildHandle is not NULL and it is not a valid | |
| EFI_HANDLE. | |
| @retval EFI_INVALID_PARAMETER Language is NULL. | |
| @retval EFI_INVALID_PARAMETER ControllerName is NULL. | |
| @retval EFI_UNSUPPORTED The driver specified by This is not currently | |
| managing the controller specified by | |
| ControllerHandle and ChildHandle. | |
| @retval EFI_UNSUPPORTED The driver specified by This does not support | |
| the language specified by Language. | |
| **/ | |
| EFI_STATUS | |
| EFIAPI | |
| DebugPortComponentNameGetControllerName ( | |
| IN EFI_COMPONENT_NAME_PROTOCOL *This, | |
| IN EFI_HANDLE ControllerHandle, | |
| IN EFI_HANDLE ChildHandle OPTIONAL, | |
| IN CHAR8 *Language, | |
| OUT CHAR16 **ControllerName | |
| ); | |
| /** | |
| DebugPort protocol member function. Calls SerialIo:GetControl to flush buffer. | |
| We cannot call SerialIo:SetAttributes because it uses pool services, which use | |
| locks, which affect TPL, so it's not interrupt context safe or re-entrant. | |
| SerialIo:Reset() calls SetAttributes, so it can't be used either. | |
| The port itself should be fine since it was set up during initialization. | |
| @param This Protocol instance pointer. | |
| @return EFI_SUCCESS Always. | |
| **/ | |
| EFI_STATUS | |
| EFIAPI | |
| DebugPortReset ( | |
| IN EFI_DEBUGPORT_PROTOCOL *This | |
| ); | |
| /** | |
| DebugPort protocol member function. Calls SerialIo:Read() after setting | |
| if it's different than the last SerialIo access. | |
| @param This Pointer to DebugPort protocol. | |
| @param Timeout Timeout value. | |
| @param BufferSize On input, the size of Buffer. | |
| On output, the amount of data actually written. | |
| @param Buffer Pointer to buffer to read. | |
| @retval EFI_SUCCESS | |
| @retval others | |
| **/ | |
| EFI_STATUS | |
| EFIAPI | |
| DebugPortRead ( | |
| IN EFI_DEBUGPORT_PROTOCOL *This, | |
| IN UINT32 Timeout, | |
| IN OUT UINTN *BufferSize, | |
| IN VOID *Buffer | |
| ); | |
| /** | |
| DebugPort protocol member function. Calls SerialIo:Write() Writes 8 bytes at | |
| a time and does a GetControl between 8 byte writes to help insure reads are | |
| interspersed This is poor-man's flow control. | |
| @param This Pointer to DebugPort protocol. | |
| @param Timeout Timeout value. | |
| @param BufferSize On input, the size of Buffer. | |
| On output, the amount of data actually written. | |
| @param Buffer Pointer to buffer to read. | |
| @retval EFI_SUCCESS The data was written. | |
| @retval others Fails when writting datas to debug port device. | |
| **/ | |
| EFI_STATUS | |
| EFIAPI | |
| DebugPortWrite ( | |
| IN EFI_DEBUGPORT_PROTOCOL *This, | |
| IN UINT32 Timeout, | |
| IN OUT UINTN *BufferSize, | |
| OUT VOID *Buffer | |
| ); | |
| /** | |
| DebugPort protocol member function. Calls SerialIo:Write() after setting | |
| if it's different than the last SerialIo access. | |
| @param This Pointer to DebugPort protocol. | |
| @retval EFI_SUCCESS At least 1 character is ready to be read from | |
| the DebugPort interface. | |
| @retval EFI_NOT_READY There are no characters ready to read from the | |
| DebugPort interface | |
| @retval EFI_DEVICE_ERROR A hardware failure occurred... (from SerialIo) | |
| **/ | |
| EFI_STATUS | |
| EFIAPI | |
| DebugPortPoll ( | |
| IN EFI_DEBUGPORT_PROTOCOL *This | |
| ); | |
| #endif |