nes-proj/cpu/cc26xx/lpm.h

/*
 * Copyright (c) 2014, Texas Instruments Incorporated - http://www.ti.com/
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the copyright holder nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 */
/*---------------------------------------------------------------------------*/
/**
 * \addtogroup cc26xx
 * @{
 *
 * \defgroup cc26xx-lpm CC26xx Low-Power management
 *
 * CC26xx low-power operation
 *
 * @{
 *
 * \file
 * Header file for the management of CC26xx low-power operation
 */
/*---------------------------------------------------------------------------*/
#ifndef LPM_H_
#define LPM_H_
/*---------------------------------------------------------------------------*/
#include "pwr_ctrl.h"

#include <stdint.h>
/*---------------------------------------------------------------------------*/
#define LPM_MODE_SLEEP         1
#define LPM_MODE_DEEP_SLEEP    2
#define LPM_MODE_SHUTDOWN      3

#define LPM_MODE_MAX_SUPPORTED LPM_MODE_DEEP_SLEEP
/*---------------------------------------------------------------------------*/
#define LPM_DOMAIN_NONE        0
#define LPM_DOMAIN_SERIAL      PRCM_DOMAIN_SERIAL
#define LPM_DOMAIN_PERIPH      PRCM_DOMAIN_PERIPH
/*---------------------------------------------------------------------------*/
typedef struct lpm_registered_module {
  struct lpm_registered_module *next;
  uint8_t (*request_max_pm)(void);
  void (*shutdown)(uint8_t mode);
  void (*wakeup)(void);
  uint32_t domain_lock;
} lpm_registered_module_t;
/*---------------------------------------------------------------------------*/
/**
 * \brief Declare a variable to be used in order to get notifications from LPM
 * \param n the variable name to be declared
 * \param m A pointer to a function which will tell the LPM module the max
 *          PM this module is willing to handle. This function will return
 *          LPM_MODE_SLEEP, LPM_MODE_DEEP_SLEEP etc. The LPM module will ask all
 *          registered modules and will trigger the highest LPM permitted
 * \param s A pointer to a function which will receive a notification just
 *          before entering the low power mode. The callee can prepare for the
 *          imminent LPM state. The argument to this function will be the
 *          upcoming low power mode. This function can e.g. turn off a
 *          peripheral before the LPM module shuts down the power domain.
 * \param w A pointer to a function which will be called just after we have
 *          woken up. This can be used to e.g. turn a peripheral back on. This
 *          function is in charge of turning power domains back on. This
 *          function will normally be called within an interrupt context.
 * \param l Power domain locks, if any are required. The module can request
 *          that the SERIAL or PERIPH PD be kept powered up at the transition
 *          to deep sleep. This field can be a bitwise OR of LPM_DOMAIN_x, so
 *          if required multiple domains can be kept powered.
 */
#define LPM_MODULE(n, m, s, w, l) static lpm_registered_module_t n = \
  { NULL, m, s, w, l }
/*---------------------------------------------------------------------------*/
/**
 * \brief Drop the cortex to sleep / deep sleep and shut down peripherals
 *
 * Whether the cortex will drop to sleep or deep sleep is configurable. The
 * exact peripherals which will be shut down is also configurable
 */
void lpm_drop(void);

/**
 * \brief Enter sleep mode
 */
void lpm_sleep(void);

/**
 * \brief Put the chip in shutdown power mode
 * \param wakeup_pin The GPIO pin which will wake us up. Must be IOID_0 etc...
 * \param io_pull Pull configuration for the shutdown pin: IOC_NO_IOPULL,
 *        IOC_IOPULL_UP or IOC_IOPULL_DOWN
 * \param wake_on High or Low (IOC_WAKE_ON_LOW or IOC_WAKE_ON_HIGH)
 */
void lpm_shutdown(uint32_t wakeup_pin, uint32_t io_pull, uint32_t wake_on);

/**
 * \brief Register a module for LPM notifications.
 * \param module A pointer to the data structure with the module definition
 *
 * When the LPM module is about to drop to some low power mode, it will first
 * notify all modules about this.
 *
 * This function must not be called before the module has been initialised
 * with lpm_init(). The code does not perform checks: This is the caller's
 * responsibility.
 */
void lpm_register_module(lpm_registered_module_t *module);

/**
 * \brief Unregister a module from LPM notifications.
 * \param module A pointer to the data structure with the module definition
 *
 * When a previously registered module is no longer interested in LPM
 * notifications, this function can be used to unregister it.
 */
void lpm_unregister_module(lpm_registered_module_t *module);

/**
 * \brief Initialise the low-power mode management module
 */
void lpm_init(void);

/**
 * \brief Sets an IOID to a default state
 * \param ioid IOID_0...
 *
 * This will set ioid to sw control, input, no pull. Input buffer and output
 * driver will both be disabled
 *
 * The function will do nothing if ioid == IOID_UNUSED, so the caller does not
 * have to check board configuration before calling this.
 */
void lpm_pin_set_default_state(uint32_t ioid);
/*---------------------------------------------------------------------------*/
#endif /* LPM_H_ */
/*---------------------------------------------------------------------------*/
/**
 * @}
 * @}
 */