mirror of https://github.com/acidanthera/audk.git
168 lines
3.1 KiB
C
168 lines
3.1 KiB
C
/** @file
|
|
|
|
Copyright (c) 2008 - 2009, Apple Inc. 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.
|
|
|
|
**/
|
|
|
|
#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;
|
|
|
|
#endif
|