esp-idf/components/hal/esp32c3/efuse_hal.c

/*
 * SPDX-FileCopyrightText: 2021-2022 Espressif Systems (Shanghai) CO LTD
 *
 * SPDX-License-Identifier: Apache-2.0
 */

#include "sdkconfig.h"
#include <sys/param.h>
#include "soc/soc_caps.h"
#include "hal/assert.h"
#include "hal/efuse_hal.h"
#include "hal/efuse_ll.h"

#define ESP_EFUSE_BLOCK_ERROR_BITS(error_reg, block) ((error_reg) & (0x08 << (4 * (block))))
#define ESP_EFUSE_BLOCK_ERROR_NUM_BITS(error_reg, block) ((error_reg) & (0x07 << (4 * (block))))

uint32_t efuse_hal_get_chip_revision(void)
{
    return efuse_ll_get_chip_revision();
}

/******************* eFuse control functions *************************/

void efuse_hal_set_timing(uint32_t apb_freq_hz)
{
    (void) apb_freq_hz;
    efuse_ll_set_pwr_off_num(0x190);
}

void efuse_hal_read(void)
{
    efuse_hal_set_timing(0);

    efuse_ll_set_conf_read_op_code();
    efuse_ll_set_read_cmd();

    while (efuse_ll_get_read_cmd() != 0) { }
    /*Due to a hardware error, we have to read READ_CMD again to make sure the efuse clock is normal*/
    while (efuse_ll_get_read_cmd() != 0) { }
}

void efuse_hal_clear_program_registers(void)
{
    ets_efuse_clear_program_registers();
}

void efuse_hal_program(uint32_t block)
{
    efuse_hal_set_timing(0);

    efuse_ll_set_conf_write_op_code();
    efuse_ll_set_pgm_cmd(block);

    while (efuse_ll_get_pgm_cmd() != 0) { }

    efuse_hal_clear_program_registers();
    efuse_hal_read();
}

void efuse_hal_rs_calculate(const void *data, void *rs_values)
{
    ets_efuse_rs_calculate(data, rs_values);
}

/******************* eFuse control functions *************************/

bool efuse_hal_is_coding_error_in_block(unsigned block)
{
    if (block == 0) {
        for (unsigned i = 0; i < 5; i++) {
            if (REG_READ(EFUSE_RD_REPEAT_ERR0_REG + i * 4)) {
                return true;
            }
        }
    } else if (block <= 10) {
        // The order of error in these regs is different only for the C3 chip.
        // Fail bit (mask=0x8):
        // EFUSE_RD_RS_ERR0_REG: (hi) BLOCK7, BLOCK6, BLOCK5, BLOCK4, BLOCK3, BLOCK2, BLOCK1, ------ (low)
        // EFUSE_RD_RS_ERR1_REG:                                                      BLOCK9, BLOCK8
        // Error num bits (mask=0x7):
        // EFUSE_RD_RS_ERR0_REG: (hi) BLOCK8, BLOCK7, BLOCK6, BLOCK5, BLOCK4, BLOCK3, BLOCK2, BLOCK1 (low)
        // EFUSE_RD_RS_ERR1_REG:                                                      BLOCK10, BLOCK9
        // BLOCK10 is not presented in the error regs.
        uint32_t err_fail_reg = REG_READ(EFUSE_RD_RS_ERR0_REG + (block / 8) * 4);
        uint32_t err_num_reg = REG_READ(EFUSE_RD_RS_ERR0_REG + ((block - 1) / 8) * 4);
        return (ESP_EFUSE_BLOCK_ERROR_BITS(err_fail_reg, block % 8) != 0) || (ESP_EFUSE_BLOCK_ERROR_NUM_BITS(err_num_reg, (block - 1) % 8) != 0);
    }
    return false;
}