osd-contiki/cpu/cc26xx/lpm.h

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2015-02-25 13:09:56 +01:00
/*
* 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 PWRCTRL_ACTIVE
#define LPM_MODE_DEEP_SLEEP PWRCTRL_POWER_DOWN
#define LPM_MODE_SHUTDOWN PWRCTRL_SHUTDOWN
#define LPM_MODE_MAX_SUPPORTED LPM_MODE_DEEP_SLEEP
/*---------------------------------------------------------------------------*/
typedef struct lpm_registered_module {
struct lpm_registered_module *next;
uint8_t (*request_max_pm)(void);
void (*shutdown)(uint8_t mode);
void (*wakeup)(void);
} 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.
*/
#define LPM_MODULE(n, m, s, w) static lpm_registered_module_t n = \
{ NULL, m, s, w }
/*---------------------------------------------------------------------------*/
/**
*
* \brief Data type used to control whether a PD will get shut down when the
* CM3 drops to deep sleep
*
* Modules using these facilities must allocate a variable of this type, but
* they must not try to manipulate it directly. Instead, the respective
* functions must be used
*
* \sa lpm_pd_lock_obtain(), lpm_pd_lock_release()
*/
typedef struct lpm_power_domain_lock {
struct lpm_power_domain_lock *next;
uint32_t domains;
} lpm_power_domain_lock_t;
/*---------------------------------------------------------------------------*/
/**
* \brief Prohibit a PD from turning off in standby mode
* \param lock A pointer to a lpm_power_domain_lock_t
* \param domains Bitwise OR from PRCM_DOMAIN_PERIPH, PRCM_DOMAIN_SERIAL
*
* The caller is responsible for allocating lpm_power_domain_lock_t
*
* Only the domains listed above can be locked / released, but a single lock
* can be used for multiple domains
*/
void lpm_pd_lock_obtain(lpm_power_domain_lock_t *lock, uint32_t domains);
/**
* \brief Permit a PD to turn off in standby mode
* \param pd A pointer to a previously used lock
*
* \sa lpm_pd_lock_obtain()
*/
void lpm_pd_lock_release(lpm_power_domain_lock_t *pd);
/**
* \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...
*/
void lpm_shutdown(uint32_t wakeup_pin);
/**
* \brief Wake up from sleep mode
*
* This function must be called at the start of any interrupt context which
* may bring us out of sleep. Current interrupts do this already, but make sure
* to do the same when adding new ISRs
*/
void lpm_wake_up(void);
/**
* \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 Initialise the low-power mode management module
*/
void lpm_init(void);
/*---------------------------------------------------------------------------*/
#endif /* LPM_H_ */
/*---------------------------------------------------------------------------*/
/**
* @}
* @}
*/