/*
 * SPDX-FileCopyrightText: 2018-2023 Espressif Systems (Shanghai) CO LTD
 *
 * SPDX-License-Identifier: Apache-2.0
 */
#include <stdbool.h>
#include <assert.h>
#include "string.h"
#include "sdkconfig.h"
#include "esp_err.h"
#include "esp_log.h"
#include "esp_rom_spiflash.h"
#include "esp_rom_crc.h"
#include "esp_rom_gpio.h"
#include "esp_rom_sys.h"
#include "esp_flash_partitions.h"
#include "bootloader_flash_priv.h"
#include "bootloader_common.h"
#include "bootloader_utility.h"
#include "soc/gpio_periph.h"
#include "soc/rtc.h"
#include "soc/efuse_reg.h"
#include "hal/gpio_ll.h"
#include "esp_image_format.h"
#include "bootloader_sha.h"
#include "sys/param.h"

#define ESP_PARTITION_HASH_LEN 32 /* SHA-256 digest length */

esp_comm_gpio_hold_t bootloader_common_check_long_hold_gpio(uint32_t num_pin, uint32_t delay_sec)
{
    return bootloader_common_check_long_hold_gpio_level(num_pin, delay_sec, false);
}

esp_comm_gpio_hold_t bootloader_common_check_long_hold_gpio_level(uint32_t num_pin, uint32_t delay_sec, bool level)
{
    esp_rom_gpio_pad_select_gpio(num_pin);
    if (GPIO_PIN_MUX_REG[num_pin]) {
        PIN_INPUT_ENABLE(GPIO_PIN_MUX_REG[num_pin]);
    }
    esp_rom_gpio_pad_pullup_only(num_pin);
    uint32_t tm_start = esp_log_early_timestamp();
    if (gpio_ll_get_level(&GPIO, num_pin) != level) {
        return GPIO_NOT_HOLD;
    }
    do {
        if (gpio_ll_get_level(&GPIO, num_pin) != level) {
            return GPIO_SHORT_HOLD;
        }
    } while (delay_sec > ((esp_log_early_timestamp() - tm_start) / 1000L));
    return GPIO_LONG_HOLD;
}

// Search for a label in the list. list = "nvs1, nvs2, otadata, nvs"; label = "nvs".
bool bootloader_common_label_search(const char *list, char *label)
{
    if (list == NULL || label == NULL) {
        return false;
    }
    const char *sub_list_start_like_label = strstr(list, label);
    while (sub_list_start_like_label != NULL) {

        // ["," or " "] + label + ["," or " " or "\0"]
        // first character before the label found there must be a delimiter ["," or " "].
        int idx_first = sub_list_start_like_label - list;
        if (idx_first == 0 || (idx_first != 0 && (list[idx_first - 1] == ',' || list[idx_first - 1] == ' '))) {
            // next character after the label found there must be a delimiter ["," or " " or "\0"].
            int len_label = strlen(label);
            if (sub_list_start_like_label[len_label] == 0   ||
                sub_list_start_like_label[len_label] == ',' ||
                sub_list_start_like_label[len_label] == ' ') {
                return true;
            }
        }

        // [start_delim] + label + [end_delim] was not found.
        // Position is moving to next delimiter if it is not the end of list.
        size_t pos_delim = strcspn(sub_list_start_like_label, ", ");
        if (pos_delim == strlen(sub_list_start_like_label)) {
            break;
        }
        sub_list_start_like_label = strstr(&sub_list_start_like_label[pos_delim], label);
    }
    return false;
}

void bootloader_common_vddsdio_configure(void)
{
#if CONFIG_BOOTLOADER_VDDSDIO_BOOST_1_9V
    rtc_vddsdio_config_t cfg = rtc_vddsdio_get_config();
    if (cfg.enable == 1 && cfg.tieh == RTC_VDDSDIO_TIEH_1_8V) {    // VDDSDIO regulator is enabled @ 1.8V
        cfg.drefh = 3;
        cfg.drefm = 3;
        cfg.drefl = 3;
        cfg.force = 1;
        rtc_vddsdio_set_config(cfg);
        esp_rom_delay_us(10); // wait for regulator to become stable
    }
#endif // CONFIG_BOOTLOADER_VDDSDIO_BOOST
}