esp-idf/components/driver/periph_ctrl.c

/*
 * SPDX-FileCopyrightText: 2015-2021 Espressif Systems (Shanghai) CO LTD
 *
 * SPDX-License-Identifier: Apache-2.0
 */
#include "freertos/FreeRTOS.h"
#include "hal/clk_gate_ll.h"
#include "esp_attr.h"
#include "esp_private/periph_ctrl.h"

static portMUX_TYPE periph_spinlock = portMUX_INITIALIZER_UNLOCKED;

static uint8_t ref_counts[PERIPH_MODULE_MAX] = {0};

void periph_module_enable(periph_module_t periph)
{
    assert(periph < PERIPH_MODULE_MAX);
    portENTER_CRITICAL_SAFE(&periph_spinlock);
    if (ref_counts[periph] == 0) {
        periph_ll_enable_clk_clear_rst(periph);
    }
    ref_counts[periph]++;
    portEXIT_CRITICAL_SAFE(&periph_spinlock);
}

void periph_module_disable(periph_module_t periph)
{
    assert(periph < PERIPH_MODULE_MAX);
    portENTER_CRITICAL_SAFE(&periph_spinlock);
    ref_counts[periph]--;
    if (ref_counts[periph] == 0) {
        periph_ll_disable_clk_set_rst(periph);
    }
    portEXIT_CRITICAL_SAFE(&periph_spinlock);
}

void periph_module_reset(periph_module_t periph)
{
    assert(periph < PERIPH_MODULE_MAX);
    portENTER_CRITICAL_SAFE(&periph_spinlock);
    periph_ll_reset(periph);
    portEXIT_CRITICAL_SAFE(&periph_spinlock);
}

#if CONFIG_ESP32_WIFI_ENABLED
IRAM_ATTR void wifi_bt_common_module_enable(void)
{
    portENTER_CRITICAL_SAFE(&periph_spinlock);
    if (ref_counts[PERIPH_WIFI_BT_COMMON_MODULE] == 0) {
        periph_ll_wifi_bt_module_enable_clk_clear_rst();
    }
    ref_counts[PERIPH_WIFI_BT_COMMON_MODULE]++;
    portEXIT_CRITICAL_SAFE(&periph_spinlock);
}

IRAM_ATTR void wifi_bt_common_module_disable(void)
{
    portENTER_CRITICAL_SAFE(&periph_spinlock);
    ref_counts[PERIPH_WIFI_BT_COMMON_MODULE]--;
    if (ref_counts[PERIPH_WIFI_BT_COMMON_MODULE] == 0) {
        periph_ll_wifi_bt_module_disable_clk_set_rst();
    }
    portEXIT_CRITICAL_SAFE(&periph_spinlock);
}

void wifi_module_enable(void)
{
    periph_ll_wifi_module_enable_clk_clear_rst();
}

void wifi_module_disable(void)
{
    periph_ll_wifi_module_disable_clk_set_rst();
}
#endif // CONFIG_ESP32_WIFI_ENABLED