123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177 |
- /** @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
|