242 lines
6.6 KiB
C
242 lines
6.6 KiB
C
/***************************************************************************//**
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* @file gpio.c
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* @brief Implementation of the GPIO Interface
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* @author Antoniu Miclaus ([email protected])
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********************************************************************************
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* Copyright 2020(c) Analog Devices, Inc.
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*
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* All rights reserved.
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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 are met:
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* - 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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* - 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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* - Neither the name of Analog Devices, Inc. nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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* - The use of this software may or may not infringe the patent rights
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* of one or more patent holders. This license does not release you
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* from the requirement that you obtain separate licenses from these
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* patent holders to use this software.
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* - Use of the software either in source or binary form, must be run
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* on or directly connected to an Analog Devices Inc. component.
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*
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* THIS SOFTWARE IS PROVIDED BY ANALOG DEVICES "AS IS" AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, NON-INFRINGEMENT,
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL ANALOG DEVICES BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, INTELLECTUAL PROPERTY RIGHTS, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*******************************************************************************/
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#include <inttypes.h>
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#include "gpio.h"
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#include <stdlib.h>
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#include "error.h"
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/******************************************************************************/
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/************************ Functions Definitions *******************************/
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/******************************************************************************/
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/**
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* @brief Obtain the GPIO decriptor.
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* @param desc - The GPIO descriptor.
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* @param param - GPIO Initialization parameters.
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* @return 0 in case of success, -1 otherwise.
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*/
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int32_t gpio_get(struct gpio_desc **desc,
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const struct gpio_init_param *param)
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{
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int32_t ret;
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if (!param || !param->platform_ops)
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return -EINVAL;
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if (!param->platform_ops->gpio_ops_get)
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return -ENOSYS;
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ret = param->platform_ops->gpio_ops_get(desc, param);
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if (ret)
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return ret;
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(*desc)->platform_ops = param->platform_ops;
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return 0;
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}
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/**
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* @brief Get the value of an optional GPIO.
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* @param desc - The GPIO descriptor.
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* @param param - GPIO Initialization parameters.
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* @return 0 in case of success, -1 otherwise.
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*/
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int32_t gpio_get_optional(struct gpio_desc **desc,
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const struct gpio_init_param *param)
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{
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int32_t ret;
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if (!param || (param->number == -1)) {
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*desc = NULL;
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return 0;
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}
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if (!param->platform_ops)
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return -EINVAL;
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if (!param->platform_ops->gpio_ops_get_optional)
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return -ENOSYS;
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ret = param->platform_ops->gpio_ops_get_optional(desc, param);
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if (ret)
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return ret;
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(*desc)->platform_ops = param->platform_ops;
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return 0;
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}
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/**
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* @brief Free the resources allocated by gpio_get().
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* @param desc - The GPIO descriptor.
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* @return 0 in case of success, -1 otherwise.
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*/
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int32_t gpio_remove(struct gpio_desc *desc)
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{
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if (desc) {
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if (!desc->platform_ops)
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return -EINVAL;
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if (!desc->platform_ops->gpio_ops_remove)
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return -ENOSYS;
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return desc->platform_ops->gpio_ops_remove(desc);
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}
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return 0;
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}
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/**
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* @brief Enable the input direction of the specified GPIO.
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* @param desc - The GPIO descriptor.
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* @return 0 in case of success, -1 otherwise.
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*/
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int32_t gpio_direction_input(struct gpio_desc *desc)
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{
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if (desc) {
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if (!desc->platform_ops)
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return -EINVAL;
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if (!desc->platform_ops->gpio_ops_direction_input)
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return -ENOSYS;
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return desc->platform_ops->gpio_ops_direction_input(desc);
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}
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return 0;
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}
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/**
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* @brief Enable the output direction of the specified GPIO.
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* @param desc - The GPIO descriptor.
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* @param value - The value.
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* Example: GPIO_HIGH
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* GPIO_LOW
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* @return 0 in case of success, -1 otherwise.
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*/
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int32_t gpio_direction_output(struct gpio_desc *desc,
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uint8_t value)
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{
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if (desc) {
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if (!desc->platform_ops)
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return -EINVAL;
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if (!desc->platform_ops->gpio_ops_direction_output)
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return -ENOSYS;
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return desc->platform_ops->
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gpio_ops_direction_output(desc, value);
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}
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return 0;
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}
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/**
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* @brief Get the direction of the specified GPIO.
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* @param desc - The GPIO descriptor.
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* @param direction - The direction.
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* Example: GPIO_OUT
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* GPIO_IN
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* @return 0 in case of success, -1 otherwise.
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*/
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int32_t gpio_get_direction(struct gpio_desc *desc,
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uint8_t *direction)
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{
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if (desc) {
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if (!desc->platform_ops)
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return -EINVAL;
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if (!desc->platform_ops->gpio_ops_get_direction)
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return -ENOSYS;
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return desc->platform_ops->
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gpio_ops_get_direction(desc, direction);
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}
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return 0;
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}
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/**
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* @brief Set the value of the specified GPIO.
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* @param desc - The GPIO descriptor.
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* @param value - The value.
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* Example: GPIO_HIGH
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* GPIO_LOW
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* @return 0 in case of success, -1 otherwise.
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*/
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int32_t gpio_set_value(struct gpio_desc *desc,
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uint8_t value)
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{
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if (desc) {
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if (!desc->platform_ops)
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return -EINVAL;
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if (!desc->platform_ops->gpio_ops_set_value)
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return -ENOSYS;
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return desc->platform_ops->gpio_ops_set_value(desc, value);
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}
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return 0;
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}
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/**
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* @brief Get the value of the specified GPIO.
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* @param desc - The GPIO descriptor.
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* @param value - The value.
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* Example: GPIO_HIGH
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* GPIO_LOW
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* @return 0 in case of success, -1 otherwise.
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*/
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int32_t gpio_get_value(struct gpio_desc *desc,
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uint8_t *value)
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{
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if (desc) {
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if (!desc->platform_ops)
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return -EINVAL;
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if (!desc->platform_ops->gpio_ops_set_value)
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return -ENOSYS;
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return desc->platform_ops->gpio_ops_get_value(desc, value);
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}
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return 0;
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}
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