kopia lustrzana https://github.com/espressif/esp-idf
304 wiersze
13 KiB
C
304 wiersze
13 KiB
C
/*
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* SPDX-FileCopyrightText: 2015-2022 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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#include <stdint.h>
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#include "soc/soc.h"
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#include "soc/rtc.h"
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#include "soc/rtc_cntl_reg.h"
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#include "soc/dport_reg.h"
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#include "soc/gpio_reg.h"
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#include "soc/syscon_reg.h"
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#include "soc/spi_mem_reg.h"
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#include "soc/extmem_reg.h"
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#include "soc/syscon_reg.h"
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#include "regi2c_ctrl.h"
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#include "soc/regi2c_lp_bias.h"
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#include "soc/regi2c_ulp.h"
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#include "soc/regi2c_dig_reg.h"
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#include "esp_hw_log.h"
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#include "esp_err.h"
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#include "esp_attr.h"
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#include "esp_efuse.h"
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#include "esp_efuse_table.h"
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#include "esp_private/spi_flash_os.h"
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#define RTC_CNTL_MEM_FORCE_NOISO (RTC_CNTL_SLOWMEM_FORCE_NOISO | RTC_CNTL_FASTMEM_FORCE_NOISO)
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static const char *TAG = "rtcinit";
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static void set_ocode_by_efuse(int calib_version);
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static void calibrate_ocode(void);
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void rtc_init(rtc_config_t cfg)
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{
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REGI2C_WRITE_MASK(I2C_DIG_REG, I2C_DIG_REG_XPD_RTC_REG, 0);
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REGI2C_WRITE_MASK(I2C_DIG_REG, I2C_DIG_REG_XPD_DIG_REG, 0);
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CLEAR_PERI_REG_MASK(RTC_CNTL_ANA_CONF_REG, RTC_CNTL_PVTMON_PU);
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REG_SET_FIELD(RTC_CNTL_TIMER1_REG, RTC_CNTL_PLL_BUF_WAIT, cfg.pll_wait);
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REG_SET_FIELD(RTC_CNTL_TIMER1_REG, RTC_CNTL_CK8M_WAIT, cfg.ck8m_wait);
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/* Moved from rtc sleep to rtc init to save sleep function running time */
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// set shortest possible sleep time limit
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REG_SET_FIELD(RTC_CNTL_TIMER5_REG, RTC_CNTL_MIN_SLP_VAL, RTC_CNTL_MIN_SLP_VAL_MIN);
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// set wifi timer
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rtc_init_config_t rtc_init_cfg = RTC_INIT_CONFIG_DEFAULT();
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REG_SET_FIELD(RTC_CNTL_TIMER3_REG, RTC_CNTL_WIFI_POWERUP_TIMER, rtc_init_cfg.wifi_powerup_cycles);
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REG_SET_FIELD(RTC_CNTL_TIMER3_REG, RTC_CNTL_WIFI_WAIT_TIMER, rtc_init_cfg.wifi_wait_cycles);
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// set bt timer
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REG_SET_FIELD(RTC_CNTL_TIMER3_REG, RTC_CNTL_BT_POWERUP_TIMER, rtc_init_cfg.bt_powerup_cycles);
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REG_SET_FIELD(RTC_CNTL_TIMER3_REG, RTC_CNTL_BT_WAIT_TIMER, rtc_init_cfg.bt_wait_cycles);
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REG_SET_FIELD(RTC_CNTL_TIMER6_REG, RTC_CNTL_CPU_TOP_POWERUP_TIMER, rtc_init_cfg.cpu_top_powerup_cycles);
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REG_SET_FIELD(RTC_CNTL_TIMER6_REG, RTC_CNTL_CPU_TOP_WAIT_TIMER, rtc_init_cfg.cpu_top_wait_cycles);
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// set rtc peri timer
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REG_SET_FIELD(RTC_CNTL_TIMER4_REG, RTC_CNTL_POWERUP_TIMER, rtc_init_cfg.rtc_powerup_cycles);
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REG_SET_FIELD(RTC_CNTL_TIMER4_REG, RTC_CNTL_WAIT_TIMER, rtc_init_cfg.rtc_wait_cycles);
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// set digital wrap timer
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REG_SET_FIELD(RTC_CNTL_TIMER4_REG, RTC_CNTL_DG_WRAP_POWERUP_TIMER, rtc_init_cfg.dg_wrap_powerup_cycles);
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REG_SET_FIELD(RTC_CNTL_TIMER4_REG, RTC_CNTL_DG_WRAP_WAIT_TIMER, rtc_init_cfg.dg_wrap_wait_cycles);
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REG_SET_FIELD(RTC_CNTL_TIMER6_REG, RTC_CNTL_DG_PERI_POWERUP_TIMER, rtc_init_cfg.dg_peri_powerup_cycles);
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REG_SET_FIELD(RTC_CNTL_TIMER6_REG, RTC_CNTL_DG_PERI_WAIT_TIMER, rtc_init_cfg.dg_peri_wait_cycles);
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/* Reset RTC bias to default value (needed if waking up from deep sleep) */
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REGI2C_WRITE_MASK(I2C_DIG_REG, I2C_DIG_REG_EXT_RTC_DREG_SLEEP, RTC_CNTL_DBIAS_1V10);
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REGI2C_WRITE_MASK(I2C_DIG_REG, I2C_DIG_REG_EXT_RTC_DREG, RTC_CNTL_DBIAS_1V10);
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/* Set the wait time to the default value. */
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REG_SET_FIELD(RTC_CNTL_TIMER2_REG, RTC_CNTL_ULPCP_TOUCH_START_WAIT, RTC_CNTL_ULPCP_TOUCH_START_WAIT_DEFAULT);
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if (cfg.cali_ocode) {
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uint32_t blk_ver_major = 0;
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esp_err_t err = esp_efuse_read_field_blob(ESP_EFUSE_BLK_VERSION_MAJOR, &blk_ver_major, ESP_EFUSE_BLK_VERSION_MAJOR[0]->bit_count); // IDF-5366
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if (err != ESP_OK) {
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blk_ver_major = 0;
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ESP_HW_LOGW(TAG, "efuse read fail, set default blk_ver_major: %d\n", blk_ver_major);
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}
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//default blk_ver_major will fallback to using the self-calibration way for OCode
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bool ocode_efuse_cali = (blk_ver_major == 1);
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if (ocode_efuse_cali) {
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set_ocode_by_efuse(blk_ver_major);
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} else {
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calibrate_ocode();
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}
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}
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if (cfg.clkctl_init) {
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//clear CMMU clock force on
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CLEAR_PERI_REG_MASK(EXTMEM_CACHE_MMU_POWER_CTRL_REG, EXTMEM_CACHE_MMU_MEM_FORCE_ON);
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//clear clkgate force on
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REG_WRITE(SYSCON_CLKGATE_FORCE_ON_REG, 0);
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//clear tag clock force on
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CLEAR_PERI_REG_MASK(EXTMEM_DCACHE_TAG_POWER_CTRL_REG, EXTMEM_DCACHE_TAG_MEM_FORCE_ON);
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CLEAR_PERI_REG_MASK(EXTMEM_ICACHE_TAG_POWER_CTRL_REG, EXTMEM_ICACHE_TAG_MEM_FORCE_ON);
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//clear register clock force on
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CLEAR_PERI_REG_MASK(SPI_MEM_CLOCK_GATE_REG(0), SPI_MEM_CLK_EN);
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CLEAR_PERI_REG_MASK(SPI_MEM_CLOCK_GATE_REG(1), SPI_MEM_CLK_EN);
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}
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if (cfg.pwrctl_init) {
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CLEAR_PERI_REG_MASK(RTC_CNTL_CLK_CONF_REG, RTC_CNTL_CK8M_FORCE_PU);
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//cancel xtal force pu if no need to force power up
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//cannot cancel xtal force pu if pll is force power on
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if (!(cfg.xtal_fpu | cfg.bbpll_fpu)) {
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CLEAR_PERI_REG_MASK(RTC_CNTL_OPTIONS0_REG, RTC_CNTL_XTL_FORCE_PU);
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} else {
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SET_PERI_REG_MASK(RTC_CNTL_OPTIONS0_REG, RTC_CNTL_XTL_FORCE_PU);
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}
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//open sar_i2c protect function to avoid sar_i2c reset when rtc_ldo is low.
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CLEAR_PERI_REG_MASK(RTC_CNTL_ANA_CONF_REG, RTC_CNTL_I2C_RESET_POR_FORCE_PD);
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//cancel bbpll force pu if setting no force power up
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if (!cfg.bbpll_fpu) {
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CLEAR_PERI_REG_MASK(RTC_CNTL_OPTIONS0_REG, RTC_CNTL_BBPLL_FORCE_PU);
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CLEAR_PERI_REG_MASK(RTC_CNTL_OPTIONS0_REG, RTC_CNTL_BBPLL_I2C_FORCE_PU);
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CLEAR_PERI_REG_MASK(RTC_CNTL_OPTIONS0_REG, RTC_CNTL_BB_I2C_FORCE_PU);
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} else {
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SET_PERI_REG_MASK(RTC_CNTL_OPTIONS0_REG, RTC_CNTL_BBPLL_FORCE_PU);
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SET_PERI_REG_MASK(RTC_CNTL_OPTIONS0_REG, RTC_CNTL_BBPLL_I2C_FORCE_PU);
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SET_PERI_REG_MASK(RTC_CNTL_OPTIONS0_REG, RTC_CNTL_BB_I2C_FORCE_PU);
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}
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//cancel RTC REG force PU
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CLEAR_PERI_REG_MASK(RTC_CNTL_PWC_REG, RTC_CNTL_FORCE_PU);
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CLEAR_PERI_REG_MASK(RTC_CNTL_REG, RTC_CNTL_REGULATOR_FORCE_PU);
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CLEAR_PERI_REG_MASK(RTC_CNTL_REG, RTC_CNTL_DBOOST_FORCE_PU);
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CLEAR_PERI_REG_MASK(RTC_CNTL_PWC_REG, RTC_CNTL_SLOWMEM_FORCE_NOISO | RTC_CNTL_FASTMEM_FORCE_NOISO);
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if (cfg.rtc_dboost_fpd) {
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SET_PERI_REG_MASK(RTC_CNTL_REG, RTC_CNTL_DBOOST_FORCE_PD);
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} else {
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CLEAR_PERI_REG_MASK(RTC_CNTL_REG, RTC_CNTL_DBOOST_FORCE_PD);
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}
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//clear i2c_reset_protect pd force, need tested in low temperature.
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CLEAR_PERI_REG_MASK(RTC_CNTL_ANA_CONF_REG, RTC_CNTL_I2C_RESET_POR_FORCE_PD);
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/* If this mask is enabled, all soc memories cannot enter power down mode */
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/* We should control soc memory power down mode from RTC, so we will not touch this register any more */
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CLEAR_PERI_REG_MASK(SYSTEM_MEM_PD_MASK_REG, SYSTEM_LSLP_MEM_PD_MASK);
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/* If this pd_cfg is set to 1, all memory won't enter low power mode during light sleep */
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/* If this pd_cfg is set to 0, all memory will enter low power mode during light sleep */
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rtc_sleep_pu_config_t pu_cfg = RTC_SLEEP_PU_CONFIG_ALL(0);
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rtc_sleep_pu(pu_cfg);
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REG_CLR_BIT(RTC_CNTL_DIG_PWC_REG, RTC_CNTL_DG_WRAP_FORCE_PU);
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REG_CLR_BIT(RTC_CNTL_DIG_ISO_REG, RTC_CNTL_DG_WRAP_FORCE_NOISO | RTC_CNTL_DG_WRAP_FORCE_ISO);
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REG_CLR_BIT(RTC_CNTL_DIG_ISO_REG, RTC_CNTL_WIFI_FORCE_NOISO | RTC_CNTL_WIFI_FORCE_ISO);
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REG_CLR_BIT(RTC_CNTL_DIG_PWC_REG, RTC_CNTL_WIFI_FORCE_PU);
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REG_CLR_BIT(RTC_CNTL_DIG_ISO_REG, RTC_CNTL_BT_FORCE_NOISO | RTC_CNTL_BT_FORCE_ISO);
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REG_CLR_BIT(RTC_CNTL_DIG_PWC_REG, RTC_CNTL_BT_FORCE_PU);
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REG_CLR_BIT(RTC_CNTL_DIG_ISO_REG, RTC_CNTL_CPU_TOP_FORCE_NOISO | RTC_CNTL_CPU_TOP_FORCE_ISO);
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REG_CLR_BIT(RTC_CNTL_DIG_PWC_REG, RTC_CNTL_CPU_TOP_FORCE_PU);
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REG_CLR_BIT(RTC_CNTL_DIG_ISO_REG, RTC_CNTL_DG_PERI_FORCE_NOISO | RTC_CNTL_DG_PERI_FORCE_ISO);
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REG_CLR_BIT(RTC_CNTL_DIG_PWC_REG, RTC_CNTL_DG_PERI_FORCE_PU);
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REG_CLR_BIT(RTC_CNTL_PWC_REG, RTC_CNTL_FORCE_NOISO);
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REG_CLR_BIT(RTC_CNTL_PWC_REG, RTC_CNTL_FORCE_ISO);
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REG_CLR_BIT(RTC_CNTL_PWC_REG, RTC_CNTL_FORCE_PU);
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//cancel digital PADS force no iso
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if (cfg.cpu_waiti_clk_gate) {
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CLEAR_PERI_REG_MASK(SYSTEM_CPU_PER_CONF_REG, SYSTEM_CPU_WAIT_MODE_FORCE_ON);
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} else {
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SET_PERI_REG_MASK(SYSTEM_CPU_PER_CONF_REG, SYSTEM_CPU_WAIT_MODE_FORCE_ON);
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}
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/*if SYSTEM_CPU_WAIT_MODE_FORCE_ON == 0 , the cpu clk will be closed when cpu enter WAITI mode*/
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CLEAR_PERI_REG_MASK(RTC_CNTL_DIG_ISO_REG, RTC_CNTL_DG_PAD_FORCE_UNHOLD);
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CLEAR_PERI_REG_MASK(RTC_CNTL_DIG_ISO_REG, RTC_CNTL_DG_PAD_FORCE_NOISO);
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}
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/* force power down wifi and bt power domain */
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SET_PERI_REG_MASK(RTC_CNTL_DIG_ISO_REG, RTC_CNTL_WIFI_FORCE_ISO);
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SET_PERI_REG_MASK(RTC_CNTL_DIG_PWC_REG, RTC_CNTL_WIFI_FORCE_PD);
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REG_WRITE(RTC_CNTL_INT_ENA_REG, 0);
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REG_WRITE(RTC_CNTL_INT_CLR_REG, UINT32_MAX);
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}
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rtc_vddsdio_config_t rtc_vddsdio_get_config(void)
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{
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rtc_vddsdio_config_t result;
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uint32_t sdio_conf_reg = REG_READ(RTC_CNTL_SDIO_CONF_REG);
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result.drefh = (sdio_conf_reg & RTC_CNTL_DREFH_SDIO_M) >> RTC_CNTL_DREFH_SDIO_S;
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result.drefm = (sdio_conf_reg & RTC_CNTL_DREFM_SDIO_M) >> RTC_CNTL_DREFM_SDIO_S;
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result.drefl = (sdio_conf_reg & RTC_CNTL_DREFL_SDIO_M) >> RTC_CNTL_DREFL_SDIO_S;
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if (sdio_conf_reg & RTC_CNTL_SDIO_FORCE) {
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// Get configuration from RTC
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result.force = 1;
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result.enable = (sdio_conf_reg & RTC_CNTL_XPD_SDIO_REG_M) >> RTC_CNTL_XPD_SDIO_REG_S;
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result.tieh = (sdio_conf_reg & RTC_CNTL_SDIO_TIEH_M) >> RTC_CNTL_SDIO_TIEH_S;
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return result;
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} else {
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result.force = 0;
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}
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// Otherwise, VDD_SDIO is controlled by bootstrapping pin
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uint32_t strap_reg = REG_READ(GPIO_STRAP_REG);
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result.tieh = (strap_reg & BIT(5)) ? RTC_VDDSDIO_TIEH_1_8V : RTC_VDDSDIO_TIEH_3_3V;
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result.enable = 1;
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return result;
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}
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void rtc_vddsdio_set_config(rtc_vddsdio_config_t config)
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{
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uint32_t val = 0;
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val |= (config.force << RTC_CNTL_SDIO_FORCE_S);
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val |= (config.enable << RTC_CNTL_XPD_SDIO_REG_S);
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val |= (config.drefh << RTC_CNTL_DREFH_SDIO_S);
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val |= (config.drefm << RTC_CNTL_DREFM_SDIO_S);
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val |= (config.drefl << RTC_CNTL_DREFL_SDIO_S);
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val |= (config.tieh << RTC_CNTL_SDIO_TIEH_S);
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val |= RTC_CNTL_SDIO_PD_EN;
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REG_WRITE(RTC_CNTL_SDIO_CONF_REG, val);
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}
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static void set_ocode_by_efuse(int calib_version)
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{
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assert(calib_version == 1);
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// use efuse ocode.
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uint32_t ocode;
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esp_err_t err = esp_efuse_read_field_blob(ESP_EFUSE_OCODE, &ocode, 8);
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assert(err == ESP_OK);
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(void) err;
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REGI2C_WRITE_MASK(I2C_ULP, I2C_ULP_EXT_CODE, ocode);
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REGI2C_WRITE_MASK(I2C_ULP, I2C_ULP_IR_FORCE_CODE, 1);
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}
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/**
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* TODO: IDF-4141
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* 1. This function will change the system clock source to XTAL. Under lower frequency (e.g. XTAL), MSPI timing tuning configures should be modified accordingly.
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* 2. RTC related should be done before SPI0 initialisation
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*/
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static void calibrate_ocode(void)
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{
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#ifndef BOOTLOADER_BUILD
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/**
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* Background:
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* 1. Following code will switch the system clock to XTAL first, to self-calibrate the OCode.
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* 2. For some of the MSPI high frequency setting (e.g. 80M DDR mode Flash or PSRAM), timing tuning is required.
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* Certain delay will be added to the MSPI RX direction.
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*
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* When CPU clock switches down, the delay should be cleared. Therefore here we call this function to remove the delays.
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*/
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spi_timing_change_speed_mode_cache_safe(true);
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#endif
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/*
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Bandgap output voltage is not precise when calibrate o-code by hardware sometimes, so need software o-code calibration (must turn off PLL).
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Method:
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1. read current cpu config, save in old_config;
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2. switch cpu to xtal because PLL will be closed when o-code calibration;
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3. begin o-code calibration;
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4. wait o-code calibration done flag(odone_flag & bg_odone_flag) or timeout;
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5. set cpu to old-config.
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*/
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soc_rtc_slow_clk_src_t slow_clk_src = rtc_clk_slow_src_get();
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rtc_cal_sel_t cal_clk = RTC_CAL_RTC_MUX;
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if (slow_clk_src == SOC_RTC_SLOW_CLK_SRC_XTAL32K) {
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cal_clk = RTC_CAL_32K_XTAL;
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} else if (slow_clk_src == SOC_RTC_SLOW_CLK_SRC_RC_FAST_D256) {
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cal_clk = RTC_CAL_8MD256;
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}
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uint64_t max_delay_time_us = 10000;
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uint32_t slow_clk_period = rtc_clk_cal(cal_clk, 100);
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uint64_t max_delay_cycle = rtc_time_us_to_slowclk(max_delay_time_us, slow_clk_period);
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uint64_t cycle0 = rtc_time_get();
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uint64_t timeout_cycle = cycle0 + max_delay_cycle;
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uint64_t cycle1 = 0;
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rtc_cpu_freq_config_t old_config;
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rtc_clk_cpu_freq_get_config(&old_config);
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rtc_clk_cpu_freq_set_xtal();
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REGI2C_WRITE_MASK(I2C_ULP, I2C_ULP_IR_RESETB, 0);
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REGI2C_WRITE_MASK(I2C_ULP, I2C_ULP_IR_RESETB, 1);
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bool odone_flag = 0;
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bool bg_odone_flag = 0;
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while (1) {
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odone_flag = REGI2C_READ_MASK(I2C_ULP, I2C_ULP_O_DONE_FLAG);
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bg_odone_flag = REGI2C_READ_MASK(I2C_ULP, I2C_ULP_BG_O_DONE_FLAG);
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cycle1 = rtc_time_get();
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if (odone_flag && bg_odone_flag) {
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break;
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}
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if (cycle1 >= timeout_cycle) {
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ESP_HW_LOGW(TAG, "o_code calibration fail\n");
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break;
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}
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}
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rtc_clk_cpu_freq_set_config(&old_config);
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#ifndef BOOTLOADER_BUILD
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//System clock is switched back to PLL. Here we switch to the MSPI high speed mode, add the delays back
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spi_timing_change_speed_mode_cache_safe(false);
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#endif
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}
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