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