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https://github.com/espressif/esp-idf.git
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a6487d4a73
The previous workaround does not work, the backup/restore should apply to RTC IO registers.
114 lines
3.5 KiB
C
114 lines
3.5 KiB
C
/*
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* SPDX-FileCopyrightText: 2015-2025 Espressif Systems (Shanghai) CO LTD
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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// The HAL layer for GPIO (common part)
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//
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#include "esp_attr.h"
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#include "soc/soc.h"
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#include "hal/gpio_hal.h"
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#include "hal/rtc_io_ll.h"
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#include "soc/soc_caps.h"
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#if CONFIG_GPIO_ESP32_SUPPORT_SWITCH_SLP_PULL
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typedef struct gpio_slp_mode_cfg {
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volatile uint32_t fun_pu;
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volatile uint32_t fun_pd;
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} gpio_slp_mode_cfg_t;
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static void gpio_hal_sleep_mode_setup_wrapper(
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gpio_hal_context_t *hal,
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uint32_t gpio_num,
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void (*opt)(gpio_hal_context_t *, uint32_t, void *)
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)
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{
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static DRAM_ATTR gpio_slp_mode_cfg_t gpio_cfg;
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if (opt) {
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(*opt)(hal, gpio_num, (void *)&gpio_cfg);
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}
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}
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/**
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* @brief GPIO pu/pd information backup function
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* @param hal gpio hal
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* @param gpio_num gpio num
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* @param args pointer for bitmap to backup GPIO pu/pd information
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*/
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static void gpio_hal_fun_pupd_backup(gpio_hal_context_t *hal, uint32_t gpio_num, void *args)
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{
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/* On ESP32, setting SLP_PU, SLP_PD couldn't change GPIO status
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* from FUN_PU, FUN_PD to SLP_PU, SLP_PD at sleep.
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* On the ESP32S2, it does.
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* The following code emulates ESP32S2`s behavior:
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*/
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gpio_slp_mode_cfg_t *pcfg = (gpio_slp_mode_cfg_t *)args;
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int rtcio_num = rtc_io_num_map[gpio_num];
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if (rtcio_num >= 0 && gpio_ll_sleep_sel_is_enabled(hal->dev, gpio_num)) {
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if (rtcio_ll_is_pullup_enabled(rtcio_num)) {
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pcfg->fun_pu |= BIT(rtcio_num);
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} else {
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pcfg->fun_pu &= ~BIT(rtcio_num);
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}
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if (rtcio_ll_is_pulldown_enabled(rtcio_num)) {
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pcfg->fun_pd |= BIT(rtcio_num);
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} else {
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pcfg->fun_pd &= ~BIT(rtcio_num);
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}
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if (gpio_ll_sleep_pullup_is_enabled(hal->dev, gpio_num)) {
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rtcio_ll_pullup_enable(rtcio_num);
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} else {
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rtcio_ll_pullup_disable(rtcio_num);
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}
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if (gpio_ll_sleep_pulldown_is_enabled(hal->dev, gpio_num)) {
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rtcio_ll_pulldown_enable(rtcio_num);
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} else {
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rtcio_ll_pulldown_disable(rtcio_num);
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}
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}
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}
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/**
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* @brief GPIO pu/pd information backup function
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* @param hal gpio hal
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* @param gpio_num gpio num
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* @param args pointer for bitmap to restore GPIO pu/pd information
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*/
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static void gpio_hal_fun_pupd_restore(gpio_hal_context_t *hal, uint32_t gpio_num, void *args)
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{
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/* On ESP32, setting SLP_PU, SLP_PD couldn't change GPIO status
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* from SLP_PU, SLP_PD to FUN_PU, FUN_PD when it wakes up.
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* On the ESP32S2, it does.
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* The following code emulates ESP32S2`s behavior:
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*/
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gpio_slp_mode_cfg_t *pcfg = (gpio_slp_mode_cfg_t *)args;
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int rtcio_num = rtc_io_num_map[gpio_num];
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if (rtcio_num >= 0 && gpio_ll_sleep_sel_is_enabled(hal->dev, gpio_num)) {
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if (pcfg->fun_pu & BIT(rtcio_num)) {
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rtcio_ll_pullup_enable(rtcio_num);
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} else {
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rtcio_ll_pullup_disable(rtcio_num);
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}
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if (pcfg->fun_pd & BIT(rtcio_num)) {
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rtcio_ll_pulldown_enable(rtcio_num);
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} else {
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rtcio_ll_pulldown_disable(rtcio_num);
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}
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}
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}
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void gpio_hal_sleep_pupd_config_apply(gpio_hal_context_t *hal, uint32_t gpio_num)
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{
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gpio_hal_sleep_mode_setup_wrapper(hal, gpio_num, gpio_hal_fun_pupd_backup);
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}
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void gpio_hal_sleep_pupd_config_unapply(gpio_hal_context_t *hal, uint32_t gpio_num)
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{
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gpio_hal_sleep_mode_setup_wrapper(hal, gpio_num, gpio_hal_fun_pupd_restore);
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}
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#endif
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