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esp-idf/components/esp_hw_support/port/esp32c2/rtc_init.c

273 wiersze
11 KiB
C
Czysty Wina Historia

/*
* SPDX-FileCopyrightText: 2020-2022 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <stdint.h>
#include "sdkconfig.h"
#include "soc/soc.h"
#include "soc/rtc.h"
#include "soc/rtc_cntl_reg.h"
#include "soc/efuse_periph.h"
#include "soc/gpio_reg.h"
#include "soc/spi_mem_reg.h"
#include "soc/extmem_reg.h"
#include "soc/system_reg.h"
#include "hal/efuse_hal.h"
#include "regi2c_ctrl.h"
#include "soc/regi2c_dig_reg.h"
#include "soc/regi2c_lp_bias.h"
#include "esp_hw_log.h"
#include "esp_efuse.h"
#include "esp_efuse_table.h"
static const char *TAG = "rtc_init";
static void set_ocode_by_efuse(int calib_version);
static void calibrate_ocode(void);
static void set_rtc_dig_dbias(void);
void rtc_init(rtc_config_t cfg)
{
REGI2C_WRITE_MASK(I2C_DIG_REG, I2C_DIG_REG_XPD_DIG_REG, 0);
REGI2C_WRITE_MASK(I2C_DIG_REG, I2C_DIG_REG_XPD_RTC_REG, 0);
REG_SET_FIELD(RTC_CNTL_TIMER1_REG, RTC_CNTL_PLL_BUF_WAIT, cfg.pll_wait);
REG_SET_FIELD(RTC_CNTL_TIMER1_REG, RTC_CNTL_CK8M_WAIT, cfg.ck8m_wait);
REG_SET_FIELD(RTC_CNTL_TIMER5_REG, RTC_CNTL_MIN_SLP_VAL, RTC_CNTL_MIN_SLP_VAL_MIN);
if (cfg.cali_ocode) {
uint32_t rtc_calib_version = 0;
esp_err_t err = esp_efuse_read_field_blob(ESP_EFUSE_BLK_VERSION_MINOR, &rtc_calib_version, ESP_EFUSE_BLK_VERSION_MINOR[0]->bit_count); // IDF-5366
if (err != ESP_OK) {
rtc_calib_version = 0;
ESP_HW_LOGW(TAG, "efuse read fail, set default rtc_calib_version: %d\n", rtc_calib_version);
}
if (rtc_calib_version == 1) {
set_ocode_by_efuse(rtc_calib_version);
} else {
calibrate_ocode();
}
}
set_rtc_dig_dbias();
if (cfg.clkctl_init) {
//clear CMMU clock force on
CLEAR_PERI_REG_MASK(EXTMEM_CACHE_MMU_POWER_CTRL_REG, EXTMEM_CACHE_MMU_MEM_FORCE_ON);
//clear tag clock force on
CLEAR_PERI_REG_MASK(EXTMEM_ICACHE_TAG_POWER_CTRL_REG, EXTMEM_ICACHE_TAG_MEM_FORCE_ON);
//clear register clock force on
CLEAR_PERI_REG_MASK(SPI_MEM_CLOCK_GATE_REG(0), SPI_MEM_CLK_EN);
CLEAR_PERI_REG_MASK(SPI_MEM_CLOCK_GATE_REG(1), SPI_MEM_CLK_EN);
}
if (cfg.pwrctl_init) {
CLEAR_PERI_REG_MASK(RTC_CNTL_CLK_CONF_REG, RTC_CNTL_CK8M_FORCE_PU);
//cancel xtal force pu if no need to force power up
//cannot cancel xtal force pu if pll is force power on
if (!(cfg.xtal_fpu | cfg.bbpll_fpu)) {
CLEAR_PERI_REG_MASK(RTC_CNTL_OPTIONS0_REG, RTC_CNTL_XTL_FORCE_PU);
} else {
SET_PERI_REG_MASK(RTC_CNTL_OPTIONS0_REG, RTC_CNTL_XTL_FORCE_PU);
}
//cancel bbpll force pu if setting no force power up
if (!cfg.bbpll_fpu) {
CLEAR_PERI_REG_MASK(RTC_CNTL_OPTIONS0_REG, RTC_CNTL_BBPLL_FORCE_PU);
CLEAR_PERI_REG_MASK(RTC_CNTL_OPTIONS0_REG, RTC_CNTL_BBPLL_I2C_FORCE_PU);
CLEAR_PERI_REG_MASK(RTC_CNTL_OPTIONS0_REG, RTC_CNTL_BB_I2C_FORCE_PU);
} else {
SET_PERI_REG_MASK(RTC_CNTL_OPTIONS0_REG, RTC_CNTL_BBPLL_FORCE_PU);
SET_PERI_REG_MASK(RTC_CNTL_OPTIONS0_REG, RTC_CNTL_BBPLL_I2C_FORCE_PU);
SET_PERI_REG_MASK(RTC_CNTL_OPTIONS0_REG, RTC_CNTL_BB_I2C_FORCE_PU);
}
CLEAR_PERI_REG_MASK(RTC_CNTL_REG, RTC_CNTL_REGULATOR_FORCE_PU);
//clear i2c_reset_protect pd force, need tested in low temperature.
//CLEAR_PERI_REG_MASK(RTC_CNTL_ANA_CONF_REG,RTC_CNTL_I2C_RESET_POR_FORCE_PD);
/* If this mask is enabled, all soc memories cannot enter power down mode */
/* We should control soc memory power down mode from RTC, so we will not touch this register any more */
CLEAR_PERI_REG_MASK(SYSTEM_MEM_PD_MASK_REG, SYSTEM_LSLP_MEM_PD_MASK);
/* If this pd_cfg is set to 1, all memory won't enter low power mode during light sleep */
/* If this pd_cfg is set to 0, all memory will enter low power mode during light sleep */
rtc_sleep_pu_config_t pu_cfg = RTC_SLEEP_PU_CONFIG_ALL(0);
rtc_sleep_pu(pu_cfg);
CLEAR_PERI_REG_MASK(RTC_CNTL_DIG_PWC_REG, RTC_CNTL_DG_WRAP_FORCE_PU);
CLEAR_PERI_REG_MASK(RTC_CNTL_DIG_ISO_REG, RTC_CNTL_DG_WRAP_FORCE_NOISO);
//cancel digital PADS force no iso
if (cfg.cpu_waiti_clk_gate) {
CLEAR_PERI_REG_MASK(SYSTEM_CPU_PER_CONF_REG, SYSTEM_CPU_WAIT_MODE_FORCE_ON);
} else {
SET_PERI_REG_MASK(SYSTEM_CPU_PER_CONF_REG, SYSTEM_CPU_WAIT_MODE_FORCE_ON);
}
/*if SYSTEM_CPU_WAIT_MODE_FORCE_ON == 0 , the cpu clk will be closed when cpu enter WAITI mode*/
CLEAR_PERI_REG_MASK(RTC_CNTL_DIG_ISO_REG, RTC_CNTL_DG_PAD_FORCE_UNHOLD);
CLEAR_PERI_REG_MASK(RTC_CNTL_DIG_ISO_REG, RTC_CNTL_DG_PAD_FORCE_NOISO);
}
REG_WRITE(RTC_CNTL_INT_ENA_REG, 0);
REG_WRITE(RTC_CNTL_INT_CLR_REG, UINT32_MAX);
REGI2C_WRITE_MASK(I2C_ULP, I2C_ULP_IR_FORCE_XPD_CK, 1);
}
rtc_vddsdio_config_t rtc_vddsdio_get_config(void)
{
rtc_vddsdio_config_t result = {0};
return result;
}
void rtc_vddsdio_set_config(rtc_vddsdio_config_t config)
{
}
static void set_ocode_by_efuse(int calib_version)
{
// ESP32C2-TODO: IDF-4940
ESP_HW_LOGW(TAG, "set_ocode_by_efuse not supported yet");
}
static void calibrate_ocode(void)
{
/*
Bandgap output voltage is not precise when calibrate o-code by hardware sometimes, so need software o-code calibration (must turn off PLL).
Method:
1. read current cpu config, save in old_config;
2. switch cpu to xtal because PLL will be closed when o-code calibration;
3. begin o-code calibration;
4. wait o-code calibration done flag(odone_flag & bg_odone_flag) or timeout;
5. set cpu to old-config.
*/
soc_rtc_slow_clk_src_t slow_clk_src = rtc_clk_slow_src_get();
rtc_cal_sel_t cal_clk = RTC_CAL_RTC_MUX;
if (slow_clk_src == SOC_RTC_SLOW_CLK_SRC_OSC_SLOW) {
cal_clk = RTC_CAL_EXT_CLK;
} else if (slow_clk_src == SOC_RTC_SLOW_CLK_SRC_RC_FAST_D256) {
cal_clk = RTC_CAL_8MD256;
}
uint64_t max_delay_time_us = 10000;
uint32_t slow_clk_period = rtc_clk_cal(cal_clk, 100);
uint64_t max_delay_cycle = rtc_time_us_to_slowclk(max_delay_time_us, slow_clk_period);
uint64_t cycle0 = rtc_time_get();
uint64_t timeout_cycle = cycle0 + max_delay_cycle;
uint64_t cycle1 = 0;
rtc_cpu_freq_config_t old_config;
rtc_clk_cpu_freq_get_config(&old_config);
rtc_clk_cpu_freq_set_xtal();
REGI2C_WRITE_MASK(I2C_ULP, I2C_ULP_IR_RESETB, 0);
REGI2C_WRITE_MASK(I2C_ULP, I2C_ULP_IR_RESETB, 1);
bool odone_flag = 0;
bool bg_odone_flag = 0;
while (1) {
odone_flag = REGI2C_READ_MASK(I2C_ULP, I2C_ULP_O_DONE_FLAG);
bg_odone_flag = REGI2C_READ_MASK(I2C_ULP, I2C_ULP_BG_O_DONE_FLAG);
cycle1 = rtc_time_get();
if (odone_flag && bg_odone_flag) {
break;
}
if (cycle1 >= timeout_cycle) {
ESP_HW_LOGW(TAG, "o_code calibration fail\n");
break;
}
}
rtc_clk_cpu_freq_set_config(&old_config);
}
static uint32_t get_dig_dbias_by_efuse(uint8_t chip_version)
{
#if CONFIG_IDF_TARGET_ESP32C2 //TODO: Need check for esp32c2
return 0;
#else
assert(chip_version >= 3);
uint32_t dig_dbias = 28;
esp_err_t err = esp_efuse_read_field_blob(ESP_EFUSE_DIG_DBIAS_HVT, &dig_dbias, 5);
if (err != ESP_OK) {
dig_dbias = 28;
ESP_HW_LOGW(TAG, "efuse read fail, set default dig_dbias value: %d\n", dig_dbias);
}
return dig_dbias;
#endif
}
uint32_t get_rtc_dbias_by_efuse(uint8_t chip_version, uint32_t dig_dbias)
{
#if CONFIG_IDF_TARGET_ESP32C2 //TODO: Need check for esp32c2
return 0;
#else
assert(chip_version >= 3);
uint32_t rtc_dbias = 0;
signed int k_rtc_ldo = 0, k_dig_ldo = 0, v_rtc_bias20 = 0, v_dig_bias20 = 0;
esp_err_t err0 = esp_efuse_read_field_blob(ESP_EFUSE_K_RTC_LDO, &k_rtc_ldo, 7);
esp_err_t err1 = esp_efuse_read_field_blob(ESP_EFUSE_K_DIG_LDO, &k_dig_ldo, 7);
esp_err_t err2 = esp_efuse_read_field_blob(ESP_EFUSE_V_RTC_DBIAS20, &v_rtc_bias20, 8);
esp_err_t err3 = esp_efuse_read_field_blob(ESP_EFUSE_V_DIG_DBIAS20, &v_dig_bias20, 8);
if ((err0 != ESP_OK) | (err1 != ESP_OK) | (err2 != ESP_OK) | (err3 != ESP_OK)) {
k_rtc_ldo = 0;
k_dig_ldo = 0;
v_rtc_bias20 = 0;
v_dig_bias20 = 0;
ESP_HW_LOGW(TAG, "efuse read fail, k_rtc_ldo: %d, k_dig_ldo: %d, v_rtc_bias20: %d, v_dig_bias20: %d\n", k_rtc_ldo, k_dig_ldo, v_rtc_bias20, v_dig_bias20);
}
k_rtc_ldo = ((k_rtc_ldo & BIT(6)) != 0)? -(k_rtc_ldo & 0x3f): k_rtc_ldo;
k_dig_ldo = ((k_dig_ldo & BIT(6)) != 0)? -(k_dig_ldo & 0x3f): (uint8_t)k_dig_ldo;
v_rtc_bias20 = ((v_rtc_bias20 & BIT(7)) != 0)? -(v_rtc_bias20 & 0x7f): (uint8_t)v_rtc_bias20;
v_dig_bias20 = ((v_dig_bias20 & BIT(7)) != 0)? -(v_dig_bias20 & 0x7f): (uint8_t)v_dig_bias20;
uint32_t v_rtc_dbias20_real_mul10000 = V_RTC_MID_MUL10000 + v_rtc_bias20 * 10000 / 500;
uint32_t v_dig_dbias20_real_mul10000 = V_DIG_MID_MUL10000 + v_dig_bias20 * 10000 / 500;
signed int k_rtc_ldo_real_mul10000 = K_RTC_MID_MUL10000 + k_rtc_ldo;
signed int k_dig_ldo_real_mul10000 = K_DIG_MID_MUL10000 + k_dig_ldo;
uint32_t v_dig_nearest_1v15_mul10000 = v_dig_dbias20_real_mul10000 + k_dig_ldo_real_mul10000 * (dig_dbias - 20);
uint32_t v_rtc_nearest_1v15_mul10000 = 0;
for (rtc_dbias = 15; rtc_dbias < 32; rtc_dbias++) {
v_rtc_nearest_1v15_mul10000 = v_rtc_dbias20_real_mul10000 + k_rtc_ldo_real_mul10000 * (rtc_dbias - 20);
if (v_rtc_nearest_1v15_mul10000 >= v_dig_nearest_1v15_mul10000 - 250)
break;
}
return rtc_dbias;
#endif
}
static void set_rtc_dig_dbias()
{
/*
1. a reasonable dig_dbias which by scaning pvt to make 120 CPU run successful stored in efuse;
2. also we store some value in efuse, include:
k_rtc_ldo (slope of rtc voltage & rtc_dbias);
k_dig_ldo (slope of digital voltage & digital_dbias);
v_rtc_bias20 (rtc voltage when rtc dbais is 20);
v_dig_bias20 (digital voltage when digital dbais is 20).
3. a reasonable rtc_dbias can be calculated by a certion formula.
*/
uint32_t rtc_dbias = 31, dig_dbias = 26;
uint8_t chip_version = efuse_hal_get_minor_chip_version();
if (chip_version >= 3) {
dig_dbias = get_dig_dbias_by_efuse(chip_version);
if (dig_dbias != 0) {
if (dig_dbias + 4 > 28) {
dig_dbias = 28;
} else {
dig_dbias += 4;
}
rtc_dbias = get_rtc_dbias_by_efuse(chip_version, dig_dbias); // already burn dig_dbias in efuse
} else {
dig_dbias = 28;
ESP_HW_LOGD(TAG, "not burn core voltage in efuse or burn wrong voltage value in chip version: 0%d\n", chip_version);
}
}
else {
ESP_HW_LOGD(TAG, "chip_version is less than 3, not burn core voltage in efuse\n");
}
REGI2C_WRITE_MASK(I2C_DIG_REG, I2C_DIG_REG_EXT_RTC_DREG, rtc_dbias);
REGI2C_WRITE_MASK(I2C_DIG_REG, I2C_DIG_REG_EXT_DIG_DREG, dig_dbias);
}
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