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/** @file
Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#ifndef __EMBEDDED_GPIO_H__
#define __EMBEDDED_GPIO_H__
//
// Protocol interface structure
//
typedef struct _EMBEDDED_GPIO EMBEDDED_GPIO;
//
// Data Types
//
typedef UINTN EMBEDDED_GPIO_PIN;
#define GPIO(Port, Pin) ((EMBEDDED_GPIO_PIN)(((Port) << (16)) | (Pin)))
#define GPIO_PIN(x) ((EMBEDDED_GPIO_PIN)(x) & (0xFFFF))
#define GPIO_PORT(x) ((EMBEDDED_GPIO_PIN)(x) >> (16))
typedef enum {
GPIO_MODE_INPUT = 0x00,
GPIO_MODE_OUTPUT_0 = 0x0E,
GPIO_MODE_OUTPUT_1 = 0x0F,
GPIO_MODE_SPECIAL_FUNCTION_2 = 0x02,
GPIO_MODE_SPECIAL_FUNCTION_3 = 0x03,
GPIO_MODE_SPECIAL_FUNCTION_4 = 0x04,
GPIO_MODE_SPECIAL_FUNCTION_5 = 0x05,
GPIO_MODE_SPECIAL_FUNCTION_6 = 0x06,
GPIO_MODE_SPECIAL_FUNCTION_7 = 0x07
} EMBEDDED_GPIO_MODE;
typedef enum {
GPIO_PULL_NONE,
GPIO_PULL_UP,
GPIO_PULL_DOWN
} EMBEDDED_GPIO_PULL;
//
// Function Prototypes
//
typedef
EFI_STATUS
(EFIAPI *EMBEDDED_GPIO_GET)(
IN EMBEDDED_GPIO *This,
IN EMBEDDED_GPIO_PIN Gpio,
OUT UINTN *Value
);
/*++
Routine Description:
Gets the state of a GPIO pin
Arguments:
This - pointer to protocol
Gpio - which pin to read
Value - state of the pin
Returns:
EFI_SUCCESS - GPIO state returned in Value
--*/
typedef
EFI_STATUS
(EFIAPI *EMBEDDED_GPIO_SET)(
IN EMBEDDED_GPIO *This,
IN EMBEDDED_GPIO_PIN Gpio,
IN EMBEDDED_GPIO_MODE Mode
);
/*++
Routine Description:
Sets the state of a GPIO pin
Arguments:
This - pointer to protocol
Gpio - which pin to modify
Mode - mode to set
Returns:
EFI_SUCCESS - GPIO set as requested
--*/
typedef
EFI_STATUS
(EFIAPI *EMBEDDED_GPIO_GET_MODE)(
IN EMBEDDED_GPIO *This,
IN EMBEDDED_GPIO_PIN Gpio,
OUT EMBEDDED_GPIO_MODE *Mode
);
/*++
Routine Description:
Gets the mode (function) of a GPIO pin
Arguments:
This - pointer to protocol
Gpio - which pin
Mode - pointer to output mode value
Returns:
EFI_SUCCESS - mode value retrieved
--*/
typedef
EFI_STATUS
(EFIAPI *EMBEDDED_GPIO_SET_PULL)(
IN EMBEDDED_GPIO *This,
IN EMBEDDED_GPIO_PIN Gpio,
IN EMBEDDED_GPIO_PULL Direction
);
/*++
Routine Description:
Sets the pull-up / pull-down resistor of a GPIO pin
Arguments:
This - pointer to protocol
Gpio - which pin
Direction - pull-up, pull-down, or none
Returns:
EFI_SUCCESS - pin was set
--*/
struct _EMBEDDED_GPIO {
EMBEDDED_GPIO_GET Get;
EMBEDDED_GPIO_SET Set;
EMBEDDED_GPIO_GET_MODE GetMode;
EMBEDDED_GPIO_SET_PULL SetPull;
};
extern EFI_GUID gEmbeddedGpioProtocolGuid;
typedef struct _GPIO_CONTROLLER GPIO_CONTROLLER;
typedef struct _PLATFORM_GPIO_CONTROLLER PLATFORM_GPIO_CONTROLLER;
struct _GPIO_CONTROLLER {
UINTN RegisterBase;
UINTN GpioIndex;
UINTN InternalGpioCount;
};
struct _PLATFORM_GPIO_CONTROLLER {
UINTN GpioCount;
UINTN GpioControllerCount;
GPIO_CONTROLLER *GpioController;
};
extern EFI_GUID gPlatformGpioProtocolGuid;
#endif
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