302 lines
12 KiB
C
302 lines
12 KiB
C
/************************************************************************************
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* arch/arm/src/imx6/imx_gpio.h
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*
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* Copyright (C) 2016 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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************************************************************************************/
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#ifndef __ARCH_ARM_SRC_IMX6_IMX_GPIO_H
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#define __ARCH_ARM_SRC_IMX6_IMX_GPIO_H
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/************************************************************************************
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* Included Files
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************************************************************************************/
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#include <nuttx/config.h>
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#include <stdint.h>
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#include <stdbool.h>
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#include "chip/imx_gpio.h"
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/************************************************************************************
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* Pre-processor Definitions
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************************************************************************************/
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/* 32-bit Encoding:
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*
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* ENCODING IIXX XXXX XXXX XXXX MMMM MMMM MMMM MMMM
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* GPIO INPUT 00.. .... GGGP PPPP MMMM MMMM MMMM MMMM
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* GPIO OUTPUT 01V. .... GGGP PPPP MMMM MMMM MMMM MMMM
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* PERIPHERAL 10AA A... IIII IIII MMMM MMMM MMMM MMMM
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*/
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/* Input/Output Selection:
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*
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* ENCODING II.. .... .... .... .... .... .... ....
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*/
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#define GPIO_MODE_SHIFT (30) /* Bits 30-31: Pin mode */
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#define GPIO_MODE_MASK (3 << GPIO_MODE_SHIFT)
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# define GPIO_INPUT (0 << GPIO_MODE_SHIFT) /* GPIO input */
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# define GPIO_OUTPUT (1 << GPIO_MODE_SHIFT) /* GPIO output */
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# define GPIO_PERIPH (2 << GPIO_MODE_SHIFT) /* Peripheral */
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/* Initial Ouptut Value:
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*
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* GPIO OUTPUT 01V. .... .... .... .... .... .... ....
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*/
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#define GPIO_OUTPUT_ZERO (0) /* Bit 29: 0=Initial output is low */
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#define GPIO_OUTPUT_ONE (1 << 29) /* Bit 29: 1=Initial output is high */
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/* GPIO Port Number
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*
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* GPIO INPUT 00.. .... GGG. .... .... .... .... ....
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* GPIO OUTPUT 01.. .... GGG. .... .... .... .... ....
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*/
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#define GPIO_PORT_SHIFT (21) /* Bits 21-23: GPIO port index */
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#define GPIO_PORT_MASK (7 << GPIO_PORT_SHIFT)
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# define GPIO_PORT1 (0 << GPIO_PORT_SHIFT) /* GPIO1 */
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# define GPIO_PORT2 (1 << GPIO_PORT_SHIFT) /* GPIO2 */
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# define GPIO_PORT3 (2 << GPIO_PORT_SHIFT) /* GPIO3 */
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# define GPIO_PORT4 (3 << GPIO_PORT_SHIFT) /* GPIO4 */
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# define GPIO_PORT5 (4 << GPIO_PORT_SHIFT) /* GPIO5 */
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# define GPIO_PORT6 (5 << GPIO_PORT_SHIFT) /* GPIO6 */
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# define GPIO_PORT7 (6 << GPIO_PORT_SHIFT) /* GPIO7 */
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/* GPIO Pin Number:
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*
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* GPIO INPUT 00.. .... ...P PPPP .... .... .... ....
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* GPIO OUTPUT 01.. .... ...P PPPP .... .... .... ....
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*/
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#define GPIO_PIN_SHIFT (16) /* Bits 16-20: GPIO pin number */
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#define GPIO_PIN_MASK (15 << GPIO_PIN_SHIFT)
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# define GPIO_PIN0 (0 << GPIO_PIN_SHIFT) /* Pin 0 */
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# define GPIO_PIN1 (1 << GPIO_PIN_SHIFT) /* Pin 1 */
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# define GPIO_PIN2 (2 << GPIO_PIN_SHIFT) /* Pin 2 */
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# define GPIO_PIN3 (3 << GPIO_PIN_SHIFT) /* Pin 3 */
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# define GPIO_PIN4 (4 << GPIO_PIN_SHIFT) /* Pin 4 */
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# define GPIO_PIN5 (5 << GPIO_PIN_SHIFT) /* Pin 5 */
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# define GPIO_PIN6 (6 << GPIO_PIN_SHIFT) /* Pin 6 */
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# define GPIO_PIN7 (7 << GPIO_PIN_SHIFT) /* Pin 7 */
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# define GPIO_PIN8 (8 << GPIO_PIN_SHIFT) /* Pin 8 */
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# define GPIO_PIN9 (9 << GPIO_PIN_SHIFT) /* Pin 9 */
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# define GPIO_PIN10 (10 << GPIO_PIN_SHIFT) /* Pin 10 */
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# define GPIO_PIN11 (11 << GPIO_PIN_SHIFT) /* Pin 11 */
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# define GPIO_PIN12 (12 << GPIO_PIN_SHIFT) /* Pin 12 */
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# define GPIO_PIN13 (13 << GPIO_PIN_SHIFT) /* Pin 13 */
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# define GPIO_PIN14 (14 << GPIO_PIN_SHIFT) /* Pin 14 */
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# define GPIO_PIN15 (15 << GPIO_PIN_SHIFT) /* Pin 15 */
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# define GPIO_PIN16 (16 << GPIO_PIN_SHIFT) /* Pin 16 */
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# define GPIO_PIN17 (17 << GPIO_PIN_SHIFT) /* Pin 17 */
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# define GPIO_PIN18 (18 << GPIO_PIN_SHIFT) /* Pin 18 */
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# define GPIO_PIN19 (19 << GPIO_PIN_SHIFT) /* Pin 19 */
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# define GPIO_PIN20 (20 << GPIO_PIN_SHIFT) /* Pin 20 */
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# define GPIO_PIN21 (21 << GPIO_PIN_SHIFT) /* Pin 21 */
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# define GPIO_PIN22 (22 << GPIO_PIN_SHIFT) /* Pin 22 */
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# define GPIO_PIN23 (23 << GPIO_PIN_SHIFT) /* Pin 23 */
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# define GPIO_PIN24 (24 << GPIO_PIN_SHIFT) /* Pin 24 */
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# define GPIO_PIN25 (25 << GPIO_PIN_SHIFT) /* Pin 25 */
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# define GPIO_PIN26 (26 << GPIO_PIN_SHIFT) /* Pin 26 */
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# define GPIO_PIN27 (27 << GPIO_PIN_SHIFT) /* Pin 27 */
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# define GPIO_PIN28 (28 << GPIO_PIN_SHIFT) /* Pin 28 */
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# define GPIO_PIN29 (29 << GPIO_PIN_SHIFT) /* Pin 29 */
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# define GPIO_PIN30 (30 << GPIO_PIN_SHIFT) /* Pin 30 */
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# define GPIO_PIN31 (31 << GPIO_PIN_SHIFT) /* Pin 31 */
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/* Peripheral Alternate Function:
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*
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* PERIPHERAL 10AA A... .... .... MMMM MMMM MMMM MMMM
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*/
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#define GPIO_ALT_SHIFT (27) /* Bits 27-29: Peripheral alternate function */
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#define GPIO_ALT_MASK (15 << GPIO_ALT_SHIFT)
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# define GPIO_ALT0 (0 << GPIO_ALT_SHIFT) /* Alternate function 1 */
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# define GPIO_ALT1 (1 << GPIO_ALT_SHIFT) /* Alternate function 2 */
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# define GPIO_ALT2 (2 << GPIO_ALT_SHIFT) /* Alternate function 3 */
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# define GPIO_ALT3 (3 << GPIO_ALT_SHIFT) /* Alternate function 4 */
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# define GPIO_ALT4 (4 << GPIO_ALT_SHIFT) /* Alternate function 5 */
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/* Alternate function 5 is GPIO */
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# define GPIO_ALT6 (6 << GPIO_ALT_SHIFT) /* Alternate function 1 */
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# define GPIO_ALT7 (7 << GPIO_ALT_SHIFT) /* Alternate function 1 */
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/* Pad Mux Register Index:
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*
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* PERIPHERAL 10.. .... IIII IIII MMMM MMMM MMMM MMMM
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*/
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#define GPIO_PADMUX_SHIFT (16) /* Bits 16-23: Peripheral alternate function */
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#define GPIO_PADMUX_MASK (0xff << GPIO_PADMUX_SHIFT)
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# define GPIO_PADMUX(n) ((uint32_t)(n) << GPIO_PADMUX_SHIFT)
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/* IOMUX Pin Configuration:
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*
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* ENCODING .... .... .... .... MMMM MMMM MMMM MMMM
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*
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* See imx_iomuxc.h for detailed content.
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*/
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#define GPIO_IOMUX_SHIFT (0) /* Bits 9-15: IOMUX pin configuration */
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#define GPIO_IOMUX_MASK (0xffff << GPIO_IOMUX_SHIFT)
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/************************************************************************************
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* Public Types
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************************************************************************************/
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/* The smallest integer type that can hold the GPIO encoding */
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typedef uint32_t gpio_pinset_t;
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/************************************************************************************
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* Public Data
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************************************************************************************/
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#undef EXTERN
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#if defined(__cplusplus)
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#define EXTERN extern "C"
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extern "C"
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{
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#else
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#define EXTERN extern
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#endif
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/************************************************************************************
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* Public Function Prototypes
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************************************************************************************/
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/************************************************************************************
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* Name: imx_gpioirq_initialize
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*
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* Description:
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* Initialize logic to support a second level of interrupt decoding for GPIO pins.
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*
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************************************************************************************/
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#ifdef CONFIG_IMX6_GPIO_IRQ
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void imx_gpioirq_initialize(void);
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#else
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# define imx_gpio_irqinitialize()
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#endif
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/************************************************************************************
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* Name: imx_config_gpio
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*
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* Description:
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* Configure a GPIO pin based on bit-encoded description of the pin.
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*
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************************************************************************************/
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int imx_config_gpio(gpio_pinset_t pinset);
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/************************************************************************************
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* Name: imx_gpio_write
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*
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* Description:
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* Write one or zero to the selected GPIO pin
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*
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************************************************************************************/
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void imx_gpio_write(gpio_pinset_t pinset, bool value);
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/************************************************************************************
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* Name: imx_gpio_read
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*
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* Description:
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* Read one or zero from the selected GPIO pin
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*
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************************************************************************************/
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bool imx_gpio_read(gpio_pinset_t pinset);
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/************************************************************************************
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* Name: imx_gpioirq
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*
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* Description:
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* Configure an interrupt for the specified GPIO pin.
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*
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************************************************************************************/
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#ifdef CONFIG_IMX6_GPIO_IRQ
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void imx_gpioirq(gpio_pinset_t pinset);
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#else
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# define imx_gpioirq(pinset)
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#endif
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/************************************************************************************
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* Name: imx_gpioirq_enable
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*
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* Description:
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* Enable the interrupt for specified GPIO IRQ
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*
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************************************************************************************/
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#ifdef CONFIG_IMX6_GPIO_IRQ
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void imx_gpioirq_enable(int irq);
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#else
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# define imx_gpioirq_enable(irq)
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#endif
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/************************************************************************************
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* Name: imx_gpioirq_disable
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*
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* Description:
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* Disable the interrupt for specified GPIO IRQ
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*
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************************************************************************************/
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#ifdef CONFIG_IMX6_GPIO_IRQ
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void imx_gpioirq_disable(int irq);
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#else
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# define imx_gpioirq_disable(irq)
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#endif
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/************************************************************************************
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* Function: imx_dump_gpio
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*
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* Description:
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* Dump all GPIO registers associated with the base address of the provided pinset.
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*
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************************************************************************************/
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#ifdef CONFIG_DEBUG_GPIO_INFO
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int imx_dump_gpio(uint32_t pinset, const char *msg);
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#else
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# define imx_dumpgpio(p,m)
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#endif
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#undef EXTERN
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#if defined(__cplusplus)
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}
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#endif
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#endif /* __ARCH_ARM_SRC_IMX6_IMX_GPIO_H */
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