212 lines
6.1 KiB
C
212 lines
6.1 KiB
C
/*
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* Copyright (c) 2015 Intel Corporation.
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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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*
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* 1) Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2) Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* 3) Neither the name of Intel Corporation nor the names of its contributors
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* may be used to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN 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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* @file Public PWM Driver APIs
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*/
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#ifndef __PWM_H__
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#define __PWM_H__
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define PWM_ACCESS_BY_PIN 0
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#define PWM_ACCESS_ALL 1
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#include <stdint.h>
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#include <stddef.h>
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#include <device.h>
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/* driver API definition */
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typedef int (*pwm_config_t)(struct device *dev, int access_op,
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uint32_t pwm, int flags);
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typedef int (*pwm_set_values_t)(struct device *dev, int access_op,
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uint32_t pwm, uint32_t on, uint32_t off);
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typedef int (*pwm_set_duty_cycle_t)(struct device *dev, int access_op,
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uint32_t pwm, uint8_t duty);
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typedef int (*pwm_suspend_dev_t)(struct device *dev);
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typedef int (*pwm_resume_dev_t)(struct device *dev);
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struct pwm_driver_api {
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pwm_config_t config;
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pwm_set_values_t set_values;
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pwm_set_duty_cycle_t set_duty_cycle;
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pwm_suspend_dev_t suspend;
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pwm_resume_dev_t resume;
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};
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/**
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* @brief Configure a single PWM output.
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*
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* @param dev Pointer to device structure for driver instance
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* @param pwm PWM output
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* @param flags PWM configuration flags
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*
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* @return DEV_OK if successful, otherwise failed.
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*/
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static inline int pwm_pin_configure(struct device *dev, uint8_t pwm,
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int flags)
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{
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struct pwm_driver_api *api;
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api = (struct pwm_driver_api *)dev->driver_api;
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return api->config(dev, PWM_ACCESS_BY_PIN, pwm, flags);
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}
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/**
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* @brief Set the ON/OFF values for a single PWM output.
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*
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* @param dev Pointer to device structure for driver instance
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* @param pwm PWM output
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* @param on ON value to set the PWM to
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* @param off OFF value to set the PWM to
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*
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* @return DEV_OK if successful, otherwise failed.
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*/
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static inline int pwm_pin_set_values(struct device *dev, uint32_t pwm,
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uint32_t on, uint32_t off)
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{
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struct pwm_driver_api *api;
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api = (struct pwm_driver_api *)dev->driver_api;
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return api->set_values(dev, PWM_ACCESS_BY_PIN, pwm, on, off);
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}
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/**
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* @brief Set the duty cycle of a single PWM output.
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*
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* This overrides any ON/OFF values being set before.
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*
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* @param dev Pointer to device structure for driver instance.
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* @param pwm PWM output
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* @param duty Duty cycle to set the PWM to (in %, e.g. 50 => 50%)
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*
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* @return DEV_OK if successful, otherwise failed.
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*/
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static inline int pwm_pin_set_duty_cycle(struct device *dev, uint32_t pwm,
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uint8_t duty)
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{
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struct pwm_driver_api *api;
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api = (struct pwm_driver_api *)dev->driver_api;
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return api->set_duty_cycle(dev, PWM_ACCESS_BY_PIN, pwm, duty);
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}
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/**
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* @brief Configure all PWM outputs.
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*
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* @param dev Pointer to device structure for driver instance
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* @param flags PWM configuration flags
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*
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* @return DEV_OK if successful, otherwise failed.
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*/
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static inline int pwm_all_configure(struct device *dev, int flags)
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{
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struct pwm_driver_api *api;
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api = (struct pwm_driver_api *)dev->driver_api;
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return api->config(dev, PWM_ACCESS_ALL, 0, flags);
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}
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/**
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* @brief Set the ON/OFF values for all PWM outputs.
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*
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* @param dev Pointer to device structure for driver instance
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* @param on ON value to set the PWM to
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* @param off OFF value to set the PWM to
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*
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* @return DEV_OK if successful, otherwise failed.
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*/
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static inline int pwm_all_set_values(struct device *dev,
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uint32_t on, uint32_t off)
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{
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struct pwm_driver_api *api;
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api = (struct pwm_driver_api *)dev->driver_api;
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return api->set_values(dev, PWM_ACCESS_ALL, 0, on, off);
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}
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/**
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* @brief Set the duty cycle of all PWM outputs.
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*
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* This overrides any ON/OFF values being set before.
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*
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* @param dev Pointer to device structure for driver instance.
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* @param pwm PWM output
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* @param duty Duty cycle to set the PWM to (in %, e.g. 50 => 50%)
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*
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* @return DEV_OK if successful, otherwise failed.
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*/
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static inline int pwm_all_set_duty_cycle(struct device *dev, uint8_t duty)
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{
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struct pwm_driver_api *api;
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api = (struct pwm_driver_api *)dev->driver_api;
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return api->set_duty_cycle(dev, PWM_ACCESS_ALL, 0, duty);
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}
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/**
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* @brief Save the state of the device and go to low power state
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*
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* @param dev Pointer to device structure for driver instance.
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*
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* @return DEV_OK if successful, otherwise failed.
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*/
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static inline int pwm_suspend(struct device *dev)
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{
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struct pwm_driver_api *api;
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api = (struct pwm_driver_api *)dev->driver_api;
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return api->suspend(dev);
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}
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/**
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* @brief Restore state stored during suspend and resume operation.
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*
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* @param dev Pointer to device structure for driver instance.
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*
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* @return DEV_OK if successful, otherwise failed.
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*/
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static inline int pwm_resume(struct device *dev)
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{
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struct pwm_driver_api *api;
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api = (struct pwm_driver_api *)dev->driver_api;
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return api->resume(dev);
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}
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#ifdef __cplusplus
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}
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#endif
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#endif /* __PWM_H__ */
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