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/*
* SPDX-FileCopyrightText: 2022-2023 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
/**
* SAR related peripherals are interdependent. This file
* provides a united control to these registers, as multiple
* components require these controls.
*
* Related peripherals are:
* - ADC
* - PWDET
*/
#include "sdkconfig.h"
#include "esp_log.h"
#include "freertos/FreeRTOS.h"
#include "esp_private/sar_periph_ctrl.h"
#include "hal/sar_ctrl_ll.h"
static const char *TAG = "sar_periph_ctrl";
extern portMUX_TYPE rtc_spinlock;
void sar_periph_ctrl_init(void)
{
//Put SAR control mux to ON state
sar_ctrl_ll_set_power_mode(SAR_CTRL_LL_POWER_ON);
//Add other periph power control initialisation here
}
void sar_periph_ctrl_power_enable(void)
{
portENTER_CRITICAL_SAFE(&rtc_spinlock);
sar_ctrl_ll_set_power_mode(SAR_CTRL_LL_POWER_ON);
portEXIT_CRITICAL_SAFE(&rtc_spinlock);
}
void sar_periph_ctrl_power_disable(void)
{
portENTER_CRITICAL_SAFE(&rtc_spinlock);
sar_ctrl_ll_set_power_mode(SAR_CTRL_LL_POWER_OFF);
portEXIT_CRITICAL_SAFE(&rtc_spinlock);
}
/**
* This gets incremented when s_sar_power_acquire() is called,
* and decremented when s_sar_power_release() is called.
* PWDET is powered down when the value reaches zero.
* Should be modified within critical section.
*/
static int s_sar_power_on_cnt;
static void s_sar_power_acquire(void)
{
portENTER_CRITICAL_SAFE(&rtc_spinlock);
s_sar_power_on_cnt++;
if (s_sar_power_on_cnt == 1) {
sar_ctrl_ll_set_power_mode(SAR_CTRL_LL_POWER_ON);
}
portEXIT_CRITICAL_SAFE(&rtc_spinlock);
}
static void s_sar_power_release(void)
{
portENTER_CRITICAL_SAFE(&rtc_spinlock);
s_sar_power_on_cnt--;
if (s_sar_power_on_cnt < 0) {
portEXIT_CRITICAL(&rtc_spinlock);
ESP_LOGE(TAG, "%s called, but s_sar_power_on_cnt == 0", __func__);
abort();
} else if (s_sar_power_on_cnt == 0) {
sar_ctrl_ll_set_power_mode(SAR_CTRL_LL_POWER_FSM);
}
portEXIT_CRITICAL_SAFE(&rtc_spinlock);
}
/*------------------------------------------------------------------------------
* PWDET Power
*----------------------------------------------------------------------------*/
void sar_periph_ctrl_pwdet_power_acquire(void)
{
s_sar_power_acquire();
}
void sar_periph_ctrl_pwdet_power_release(void)
{
s_sar_power_release();
}
/*------------------------------------------------------------------------------
* ADC Power
*----------------------------------------------------------------------------*/
void sar_periph_ctrl_adc_oneshot_power_acquire(void)
{
s_sar_power_acquire();
}
void sar_periph_ctrl_adc_oneshot_power_release(void)
{
s_sar_power_release();
}
void sar_periph_ctrl_adc_continuous_power_acquire(void)
{
s_sar_power_acquire();
}
void sar_periph_ctrl_adc_continuous_power_release(void)
{
s_sar_power_release();
}
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