mirror of https://github.com/acidanthera/audk.git
168 lines
3.1 KiB
C
168 lines
3.1 KiB
C
/** @file
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Copyright (c) 2008-2009 Apple Inc. All rights reserved.<BR>
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All rights reserved. This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#ifndef __EMBEDDED_GPIO_H__
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#define __EMBEDDED_GPIO_H__
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//
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// Protocol interface structure
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//
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typedef struct _EMBEDDED_GPIO EMBEDDED_GPIO;
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//
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// Data Types
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//
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typedef UINTN EMBEDDED_GPIO_PIN;
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#define GPIO(Port, Pin) ((EMBEDDED_GPIO_PIN)(((Port) << (16)) | (Pin)))
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#define GPIO_PIN(x) ((EMBEDDED_GPIO_PIN)(x) & (0xFFFF))
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#define GPIO_PORT(x) ((EMBEDDED_GPIO_PIN)(x) >> (16))
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typedef enum {
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GPIO_MODE_INPUT = 0x00,
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GPIO_MODE_OUTPUT_0 = 0x0E,
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GPIO_MODE_OUTPUT_1 = 0x0F,
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GPIO_MODE_SPECIAL_FUNCTION_2 = 0x02,
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GPIO_MODE_SPECIAL_FUNCTION_3 = 0x03,
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GPIO_MODE_SPECIAL_FUNCTION_4 = 0x04,
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GPIO_MODE_SPECIAL_FUNCTION_5 = 0x05,
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GPIO_MODE_SPECIAL_FUNCTION_6 = 0x06,
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GPIO_MODE_SPECIAL_FUNCTION_7 = 0x07
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} EMBEDDED_GPIO_MODE;
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typedef enum {
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GPIO_PULL_NONE,
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GPIO_PULL_UP,
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GPIO_PULL_DOWN
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} EMBEDDED_GPIO_PULL;
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//
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// Function Prototypes
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//
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typedef
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EFI_STATUS
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(EFIAPI *EMBEDDED_GPIO_GET) (
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IN EMBEDDED_GPIO *This,
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IN EMBEDDED_GPIO_PIN Gpio,
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OUT UINTN *Value
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);
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/*++
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Routine Description:
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Gets the state of a GPIO pin
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Arguments:
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This - pointer to protocol
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Gpio - which pin to read
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Value - state of the pin
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Returns:
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EFI_SUCCESS - GPIO state returned in Value
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--*/
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typedef
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EFI_STATUS
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(EFIAPI *EMBEDDED_GPIO_SET) (
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IN EMBEDDED_GPIO *This,
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IN EMBEDDED_GPIO_PIN Gpio,
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IN EMBEDDED_GPIO_MODE Mode
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);
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/*++
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Routine Description:
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Sets the state of a GPIO pin
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Arguments:
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This - pointer to protocol
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Gpio - which pin to modify
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Mode - mode to set
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Returns:
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EFI_SUCCESS - GPIO set as requested
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--*/
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typedef
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EFI_STATUS
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(EFIAPI *EMBEDDED_GPIO_GET_MODE) (
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IN EMBEDDED_GPIO *This,
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IN EMBEDDED_GPIO_PIN Gpio,
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OUT EMBEDDED_GPIO_MODE *Mode
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);
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/*++
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Routine Description:
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Gets the mode (function) of a GPIO pin
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Arguments:
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This - pointer to protocol
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Gpio - which pin
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Mode - pointer to output mode value
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Returns:
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EFI_SUCCESS - mode value retrieved
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--*/
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typedef
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EFI_STATUS
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(EFIAPI *EMBEDDED_GPIO_SET_PULL) (
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IN EMBEDDED_GPIO *This,
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IN EMBEDDED_GPIO_PIN Gpio,
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IN EMBEDDED_GPIO_PULL Direction
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);
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/*++
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Routine Description:
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Sets the pull-up / pull-down resistor of a GPIO pin
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Arguments:
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This - pointer to protocol
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Gpio - which pin
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Direction - pull-up, pull-down, or none
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Returns:
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EFI_SUCCESS - pin was set
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--*/
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struct _EMBEDDED_GPIO {
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EMBEDDED_GPIO_GET Get;
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EMBEDDED_GPIO_SET Set;
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EMBEDDED_GPIO_GET_MODE GetMode;
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EMBEDDED_GPIO_SET_PULL SetPull;
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};
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extern EFI_GUID gEmbeddedGpioProtocolGuid;
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#endif
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