esp-idf/components/hal/esp32/efuse_hal.c

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/*
* 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/efuse_ll.h"
#include "hal/assert.h"
#include "hal/efuse_hal.h"
#include "soc/syscon_reg.h"
uint32_t efuse_hal_get_chip_revision(void)
{
uint8_t eco_bit0 = efuse_ll_get_chip_ver_rev1();
uint8_t eco_bit1 = efuse_ll_get_chip_ver_rev2();
uint8_t eco_bit2 = (REG_READ(SYSCON_DATE_REG) & 0x80000000) >> 31;
uint32_t combine_value = (eco_bit2 << 2) | (eco_bit1 << 1) | eco_bit0;
uint32_t chip_ver = 0;
switch (combine_value) {
case 0:
chip_ver = 0;
break;
case 1:
chip_ver = 1;
break;
case 3:
chip_ver = 2;
break;
#if CONFIG_IDF_ENV_FPGA
case 4: /* Empty efuses, but SYSCON_DATE_REG bit is set */
chip_ver = 3;
break;
#endif // CONFIG_IDF_ENV_FPGA
case 7:
chip_ver = 3;
break;
default:
chip_ver = 0;
break;
}
return chip_ver;
}
uint32_t efuse_hal_get_rated_freq_mhz(void)
{
//Check if ESP32 is rated for a CPU frequency of 160MHz only
if (efuse_ll_get_chip_cpu_freq_rated() && efuse_ll_get_chip_cpu_freq_low()) {
return 160;
}
return 240;
}
/******************* eFuse control functions *************************/
void efuse_hal_set_timing(uint32_t apb_freq_mhz)
{
uint32_t clk_sel0;
uint32_t clk_sel1;
uint32_t dac_clk_div;
if (apb_freq_mhz <= 26) {
clk_sel0 = 250;
clk_sel1 = 255;
dac_clk_div = 52;
} else if (apb_freq_mhz <= 40) {
clk_sel0 = 160;
clk_sel1 = 255;
dac_clk_div = 80;
} else {
clk_sel0 = 80;
clk_sel1 = 128;
dac_clk_div = 100;
}
efuse_ll_set_dac_clk_div(dac_clk_div);
efuse_ll_set_dac_clk_sel0(clk_sel0);
efuse_ll_set_dac_clk_sel1(clk_sel1);
}
void efuse_hal_read(void)
{
efuse_ll_set_conf_read_op_code();
efuse_ll_set_read_cmd();
while (efuse_ll_get_cmd() != 0) { };
}
void efuse_hal_clear_program_registers(void)
{
efuse_ll_set_conf_read_op_code();
}
void efuse_hal_program(uint32_t block)
{
(void) block;
// Permanently update values written to the efuse write registers
efuse_ll_set_conf_write_op_code();
efuse_ll_set_pgm_cmd();
while (efuse_ll_get_cmd() != 0) { };
efuse_hal_read();
}
/******************* eFuse control functions *************************/