rtc: update from bringup branch

components/soc/esp32s2beta/include/soc/rtc.h

@@ -247,6 +247,11 @@ bool rtc_clk_8md256_enabled(void);
  */
 void rtc_clk_apll_enable(bool enable, uint32_t sdm0, uint32_t sdm1, uint32_t sdm2, uint32_t o_div);
 
+/**
+ * @brief Set XTAL wait cycles by RTC slow clock's period
+ */
+void rtc_clk_set_xtal_wait(void);
+
 /**
  * @brief Select source for RTC_SLOW_CLK
  * @param slow_freq clock source (one of rtc_slow_freq_t values)

components/soc/esp32s2beta/rtc_clk.c

@@ -265,6 +265,29 @@ void rtc_clk_apll_enable(bool enable, uint32_t sdm0, uint32_t sdm1, uint32_t sdm
     }
 }
 
+void rtc_clk_set_xtal_wait(void)
+{
+    /*
+     the `xtal_wait` time need 1ms, so we need calibrate slow clk period,
+     and `RTC_CNTL_XTL_BUF_WAIT` depend on it.
+    */
+    rtc_slow_freq_t slow_clk_freq = rtc_clk_slow_freq_get();
+    rtc_slow_freq_t rtc_slow_freq_x32k = RTC_SLOW_FREQ_32K_XTAL;
+    rtc_slow_freq_t rtc_slow_freq_8MD256 = RTC_SLOW_FREQ_8MD256;
+    rtc_cal_sel_t cal_clk = RTC_CAL_RTC_MUX;
+    if (slow_clk_freq == (rtc_slow_freq_x32k)) {
+        cal_clk = RTC_CAL_32K_XTAL;
+    } else if (slow_clk_freq == rtc_slow_freq_8MD256) {
+        cal_clk  = RTC_CAL_8MD256;
+    }
+    uint32_t slow_clk_period = rtc_clk_cal(cal_clk, 2000);
+    uint32_t xtal_wait_1ms = 100;
+    if (slow_clk_period) {
+        xtal_wait_1ms = (1000 << RTC_CLK_CAL_FRACT) / slow_clk_period;
+    }
+    REG_SET_FIELD(RTC_CNTL_TIMER1_REG, RTC_CNTL_XTL_BUF_WAIT, xtal_wait_1ms);
+}
+
 void rtc_clk_slow_freq_set(rtc_slow_freq_t slow_freq)
 {
     REG_SET_FIELD(RTC_CNTL_CLK_CONF_REG, RTC_CNTL_ANA_CLK_RTC_SEL, slow_freq);
@@ -275,6 +298,11 @@ void rtc_clk_slow_freq_set(rtc_slow_freq_t slow_freq)
     REG_SET_FIELD(RTC_CNTL_CLK_CONF_REG, RTC_CNTL_DIG_XTAL32K_EN,
             (slow_freq == RTC_SLOW_FREQ_32K_XTAL) ? 1 : 0);
 
+    /* The clk_8m_d256 will be closed when rtc_state in SLEEP,
+    so if the slow_clk is 8md256, clk_8m must be force power on
+    */
+    REG_SET_FIELD(RTC_CNTL_CLK_CONF_REG,RTC_CNTL_CK8M_FORCE_PU, (slow_freq == RTC_SLOW_FREQ_8MD256) ? 1 : 0);
+    rtc_clk_set_xtal_wait();
     ets_delay_us(DELAY_SLOW_CLK_SWITCH);
 }
 
@@ -458,6 +486,7 @@ static void rtc_clk_cpu_freq_to_xtal(void)
 
     rtc_clk_apb_freq_update(xtal_freq * MHZ);
     s_cur_freq = RTC_CPU_FREQ_XTAL;
+    s_cur_pll  = RTC_PLL_NONE;
 }
 
 /**
@@ -570,12 +599,15 @@ void rtc_clk_cpu_freq_set(rtc_cpu_freq_t cpu_freq)
         }
 
         if ((cpu_freq == RTC_CPU_FREQ_80M) || (cpu_freq == RTC_CPU_320M_80M)) {
+            REG_SET_FIELD(RTC_CNTL_REG, RTC_CNTL_DIG_DBIAS_WAK, DIG_DBIAS_80M_160M);
             DPORT_REG_SET_FIELD(DPORT_CPU_PER_CONF_REG, DPORT_CPUPERIOD_SEL, 0);
             ets_update_cpu_frequency(80);
         } else if ((cpu_freq == RTC_CPU_FREQ_160M) || (cpu_freq == RTC_CPU_320M_160M)) {
+            REG_SET_FIELD(RTC_CNTL_REG, RTC_CNTL_DIG_DBIAS_WAK, DIG_DBIAS_80M_160M);
             DPORT_REG_SET_FIELD(DPORT_CPU_PER_CONF_REG, DPORT_CPUPERIOD_SEL, 1);
             ets_update_cpu_frequency(160);
         } else if (cpu_freq == RTC_CPU_FREQ_240M) {
+            REG_SET_FIELD(RTC_CNTL_REG, RTC_CNTL_DIG_DBIAS_WAK, DIG_DBIAS_240M);
             DPORT_REG_SET_FIELD(DPORT_CPU_PER_CONF_REG, DPORT_CPUPERIOD_SEL, 2);
             ets_update_cpu_frequency(240);
         }

components/soc/esp32s2beta/rtc_init.c

@@ -49,9 +49,8 @@
 void rtc_init(rtc_config_t cfg)
 {
     CLEAR_PERI_REG_MASK(RTC_CNTL_ANA_CONF_REG, RTC_CNTL_PVTMON_PU);
-
+    rtc_clk_set_xtal_wait();
     REG_SET_FIELD(RTC_CNTL_TIMER1_REG, RTC_CNTL_PLL_BUF_WAIT, cfg.pll_wait);
-    REG_SET_FIELD(RTC_CNTL_TIMER1_REG, RTC_CNTL_XTL_BUF_WAIT, cfg.xtal_wait);
     REG_SET_FIELD(RTC_CNTL_TIMER1_REG, RTC_CNTL_CK8M_WAIT, cfg.ck8m_wait);
 
     /* Moved from rtc sleep to rtc init to save sleep function running time */

components/soc/esp32s2beta/rtc_sleep.c

@@ -144,7 +144,7 @@ void rtc_sleep_init(rtc_sleep_config_t cfg)
                 RTC_CNTL_RFRX_PBUS_PU | RTC_CNTL_TXRF_I2C_PU);
     } else {
         CLEAR_PERI_REG_MASK(RTC_CNTL_DIG_PWC_REG, RTC_CNTL_DG_WRAP_PD_EN);
-        REG_SET_FIELD(RTC_CNTL_BIAS_CONF_REG, RTC_CNTL_DBG_ATTEN, 0);
+        REG_SET_FIELD(RTC_CNTL_BIAS_CONF_REG, RTC_CNTL_DBG_ATTEN, 6);
     }
 
     /* enable VDDSDIO control by state machine */

components/soc/esp32s2beta/rtc_time.c

@@ -51,6 +51,14 @@ uint32_t rtc_clk_cal_internal(rtc_cal_sel_t cal_clk, uint32_t slowclk_cycles)
     }
     /* Prepare calibration */
     REG_SET_FIELD(TIMG_RTCCALICFG_REG(0), TIMG_RTC_CALI_CLK_SEL, cal_clk);
+    /* There may be another calibration process already running during we call this function,
+     * so we should wait the last process is done.
+     */
+    if (!GET_PERI_REG_MASK(TIMG_RTCCALICFG2_REG(0), TIMG_RTC_CALI_TIMEOUT)) {
+        if (GET_PERI_REG_MASK(TIMG_RTCCALICFG_REG(0), TIMG_RTC_CALI_START_CYCLING)) {
+            while(!GET_PERI_REG_MASK(TIMG_RTCCALICFG_REG(0), TIMG_RTC_CALI_RDY));
+        }
+    }
     CLEAR_PERI_REG_MASK(TIMG_RTCCALICFG_REG(0), TIMG_RTC_CALI_START_CYCLING);
     REG_SET_FIELD(TIMG_RTCCALICFG_REG(0), TIMG_RTC_CALI_MAX, slowclk_cycles);
     /* Figure out how long to wait for calibration to finish */
@@ -58,14 +66,14 @@ uint32_t rtc_clk_cal_internal(rtc_cal_sel_t cal_clk, uint32_t slowclk_cycles)
     /* Set timeout reg and expect time delay*/
     uint32_t expected_freq;
     if (cal_clk == RTC_CAL_32K_XTAL) {
-        REG_SET_FIELD(TIMG_RTCCALICFG2_REG(0), TIMG_RTC_CALI_TIMEOUT_THRES, (slowclk_cycles << 12));
+        REG_SET_FIELD(TIMG_RTCCALICFG2_REG(0), TIMG_RTC_CALI_TIMEOUT_THRES, (slowclk_cycles << 13));
         expected_freq = 32768;
     } else if (cal_clk == RTC_CAL_8MD256) {
-        REG_SET_FIELD(TIMG_RTCCALICFG2_REG(0), TIMG_RTC_CALI_TIMEOUT_THRES, (slowclk_cycles << 12));
+        REG_SET_FIELD(TIMG_RTCCALICFG2_REG(0), TIMG_RTC_CALI_TIMEOUT_THRES, (slowclk_cycles << 13));
         expected_freq = RTC_FAST_CLK_FREQ_APPROX / 256;
     } else {
-        REG_SET_FIELD(TIMG_RTCCALICFG2_REG(0), TIMG_RTC_CALI_TIMEOUT_THRES, (slowclk_cycles << 10));
-        expected_freq = 150000;
+        REG_SET_FIELD(TIMG_RTCCALICFG2_REG(0), TIMG_RTC_CALI_TIMEOUT_THRES, (slowclk_cycles << 11));
+        expected_freq = 90000;
     }
     uint32_t us_time_estimate = (uint32_t) (((uint64_t) slowclk_cycles) * MHZ / expected_freq);
     /* Start calibration */
@@ -85,6 +93,7 @@ uint32_t rtc_clk_cal_internal(rtc_cal_sel_t cal_clk, uint32_t slowclk_cycles)
             break;
         }
     }
+    CLEAR_PERI_REG_MASK(TIMG_RTCCALICFG_REG(0), TIMG_RTC_CALI_START);
 
     REG_SET_FIELD(RTC_CNTL_CLK_CONF_REG, RTC_CNTL_DIG_XTAL32K_EN, dig_32k_xtal_state);