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esp-idf/components/soc/esp32/rtc_clk.c

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soc: add source code of rtc_clk, rtc_pm
2017-04-11 03:44:43 -04:00
// Copyright 2015-2017 Espressif Systems (Shanghai) PTE LTD
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include <stdbool.h>
#include <stdint.h>
#include <stddef.h>
soc/rtc: CPU frequency settings refactoring Previous APIs used to set CPU frequency used CPU frequencies listed in rtc_cpu_freq_t enumeration. This was problematic for two reasons. First, supporting many possible frequency values obtained by dividing XTAL frequency was hard, as every value would have to be listed in the enumeration. Since different base XTAL frequencies are supported, this further complicated things, since not all of these divided frequencies would be valid for any given XTAL frequency. Second, having to deal with enumeration values often involved switch statements to convert between enumeration and MHz values, handle PLL/XTAL frequencies separately, etc. This change introduces rtc_cpu_freq_config_t structure, which contains CPU frequency (in MHz) and information on how this frequency has to be generated: clock source (XTAL/PLL), source frequency, clock divider value. More fields can be added to this structure in the future. This structure simplifies many parts of the code, since both frequency value and frequency generation settings can be accessed in any place in code without the need for conversions. Additionally, this change adds setting of REF_TICK dividers to support frequencies lower then XTAL with DFS.
2018-07-29 03:47:58 -04:00
#include <stdlib.h>
separate rom from esp32 component to esp_rom 1. separate rom include files and linkscript to esp_rom 2. modefiy "include rom/xxx.h" to "include esp32/rom/xxx.h" 3. Forward compatible 4. update mqtt
2019-03-14 05:29:32 -04:00
#include "esp32/rom/ets_sys.h"
#include "esp32/rom/rtc.h"
#include "esp32/rom/uart.h"
#include "esp32/rom/gpio.h"
soc: add source code of rtc_clk, rtc_pm
2017-04-11 03:44:43 -04:00
#include "soc/rtc.h"
all: Using xxx_periph.h Using xxx_periph.h in whole IDF instead of xxx_reg.h, xxx_struct.h, xxx_channel.h ... . Cleaned up header files from unnecessary headers (releated to soc/... headers).
2019-05-13 06:02:45 -04:00
#include "soc/rtc_periph.h"
#include "soc/sens_periph.h"
soc: add source code of rtc_clk, rtc_pm
2017-04-11 03:44:43 -04:00
#include "soc/dport_reg.h"
all: Using xxx_periph.h Using xxx_periph.h in whole IDF instead of xxx_reg.h, xxx_struct.h, xxx_channel.h ... . Cleaned up header files from unnecessary headers (releated to soc/... headers).
2019-05-13 06:02:45 -04:00
#include "soc/efuse_periph.h"
soc: add source code of rtc_clk, rtc_pm
2017-04-11 03:44:43 -04:00
#include "soc/apb_ctrl_reg.h"
#include "i2c_rtc_clk.h"
#include "soc_log.h"
#include "sdkconfig.h"
fix(global, log): fix `esp_log(_early)_timestamp` readings after startup by correct the CCOUNT register when switching CPU clock. TW#13332, Closes #700
2017-09-13 05:34:43 -04:00
#include "xtensa/core-macros.h"
soc/rtc_clk: split rtc_clk_init into separate object file rtc_clk_init and related functions don’t need to be in IRAM/DRAM.
2018-07-29 01:24:20 -04:00
#include "rtc_clk_common.h"
soc: add source code of rtc_clk, rtc_pm
2017-04-11 03:44:43 -04:00
Add support for 32k XTAL as RTC_SLOW_CLK source - RTC_CNTL_SLOWCLK_FREQ define is removed; rtc_clk_slow_freq_get_hz function can be used instead to get an approximate RTC_SLOW_CLK frequency - Clock calibration is performed at startup. The value is saved and used for timekeeping and when entering deep sleep. - When using the 32k XTAL, startup code will wait for the oscillator to start up. This can be possibly optimized by starting a separate task to wait for oscillator startup, and performing clock switch in that task. - Fix a bug that 32k XTAL would be disabled in rtc_clk_init. - Fix a rounding error in rtc_clk_cal, which caused systematic frequency error. - Fix an overflow bug which caused rtc_clk_cal to timeout early if the slow_clk_cycles argument would exceed certain value - Improve 32k XTAL oscillator startup time by introducing bootstrapping code, which uses internal pullup/pulldown resistors on 32K_N/32K_P pins to set better initial conditions for the oscillator.
2017-04-24 06:36:47 -04:00
/* Frequency of the 8M oscillator is 8.5MHz +/- 5%, at the default DCAP setting */
#define RTC_FAST_CLK_FREQ_8M 8500000
#define RTC_SLOW_CLK_FREQ_150K 150000
#define RTC_SLOW_CLK_FREQ_8MD256 (RTC_FAST_CLK_FREQ_8M / 256)
#define RTC_SLOW_CLK_FREQ_32K 32768
soc/rtc: reset BBPLL configuration after enabling it A workaround to reset BBPLL configuration after light sleep. Fixes the issue that Wi-Fi can not receive packets after waking up from light sleep. Ref. https://github.com/espressif/esp-idf/issues/2711
2018-12-06 01:43:24 -05:00
/* BBPLL configuration values */
soc: add source code of rtc_clk, rtc_pm
2017-04-11 03:44:43 -04:00
#define BBPLL_ENDIV5_VAL_320M 0x43
#define BBPLL_BBADC_DSMP_VAL_320M 0x84
#define BBPLL_ENDIV5_VAL_480M 0xc3
#define BBPLL_BBADC_DSMP_VAL_480M 0x74
soc/rtc: reset BBPLL configuration after enabling it A workaround to reset BBPLL configuration after light sleep. Fixes the issue that Wi-Fi can not receive packets after waking up from light sleep. Ref. https://github.com/espressif/esp-idf/issues/2711
2018-12-06 01:43:24 -05:00
#define BBPLL_IR_CAL_DELAY_VAL 0x18
#define BBPLL_IR_CAL_EXT_CAP_VAL 0x20
#define BBPLL_OC_ENB_FCAL_VAL 0x9a
#define BBPLL_OC_ENB_VCON_VAL 0x00
soc/rtc: reset another BBPLL related register Follow-up to b21ffc8a: an additional register needs to be reset. Ref. https://github.com/espressif/esp-idf/issues/2711
2018-12-11 23:22:48 -05:00
#define BBPLL_BBADC_CAL_7_0_VAL 0x00
soc: add source code of rtc_clk, rtc_pm
2017-04-11 03:44:43 -04:00
#define APLL_SDM_STOP_VAL_1 0x09
#define APLL_SDM_STOP_VAL_2_REV0 0x69
#define APLL_SDM_STOP_VAL_2_REV1 0x49
#define APLL_CAL_DELAY_1 0x0f
#define APLL_CAL_DELAY_2 0x3f
#define APLL_CAL_DELAY_3 0x1f
soc/rtc: Bypass touchpad current to external 32k crystal oscillator
2018-05-23 03:24:09 -04:00
#define XTAL_32K_DAC_VAL 3
soc: add source code of rtc_clk, rtc_pm
2017-04-11 03:44:43 -04:00
#define XTAL_32K_DRES_VAL 3
#define XTAL_32K_DBIAS_VAL 0
Add support for 32k XTAL as RTC_SLOW_CLK source - RTC_CNTL_SLOWCLK_FREQ define is removed; rtc_clk_slow_freq_get_hz function can be used instead to get an approximate RTC_SLOW_CLK frequency - Clock calibration is performed at startup. The value is saved and used for timekeeping and when entering deep sleep. - When using the 32k XTAL, startup code will wait for the oscillator to start up. This can be possibly optimized by starting a separate task to wait for oscillator startup, and performing clock switch in that task. - Fix a bug that 32k XTAL would be disabled in rtc_clk_init. - Fix a rounding error in rtc_clk_cal, which caused systematic frequency error. - Fix an overflow bug which caused rtc_clk_cal to timeout early if the slow_clk_cycles argument would exceed certain value - Improve 32k XTAL oscillator startup time by introducing bootstrapping code, which uses internal pullup/pulldown resistors on 32K_N/32K_P pins to set better initial conditions for the oscillator.
2017-04-24 06:36:47 -04:00
#define XTAL_32K_BOOTSTRAP_DAC_VAL 3
#define XTAL_32K_BOOTSTRAP_DRES_VAL 3
#define XTAL_32K_BOOTSTRAP_DBIAS_VAL 0
#define XTAL_32K_BOOTSTRAP_TIME_US 7
soc/rtc: add support for external 32k oscillator Compared to external 32k XTAL, when active oscillator is used as input, some parameters need to be set differently.
2018-08-12 18:10:29 -04:00
#define XTAL_32K_EXT_DAC_VAL 2
#define XTAL_32K_EXT_DRES_VAL 3
#define XTAL_32K_EXT_DBIAS_VAL 1
soc: add source code of rtc_clk, rtc_pm
2017-04-11 03:44:43 -04:00
/* Delays for various clock sources to be enabled/switched.
* All values are in microseconds.
* TODO: some of these are excessive, and should be reduced.
*/
#define DELAY_PLL_DBIAS_RAISE 3
Add support for 32k XTAL as RTC_SLOW_CLK source - RTC_CNTL_SLOWCLK_FREQ define is removed; rtc_clk_slow_freq_get_hz function can be used instead to get an approximate RTC_SLOW_CLK frequency - Clock calibration is performed at startup. The value is saved and used for timekeeping and when entering deep sleep. - When using the 32k XTAL, startup code will wait for the oscillator to start up. This can be possibly optimized by starting a separate task to wait for oscillator startup, and performing clock switch in that task. - Fix a bug that 32k XTAL would be disabled in rtc_clk_init. - Fix a rounding error in rtc_clk_cal, which caused systematic frequency error. - Fix an overflow bug which caused rtc_clk_cal to timeout early if the slow_clk_cycles argument would exceed certain value - Improve 32k XTAL oscillator startup time by introducing bootstrapping code, which uses internal pullup/pulldown resistors on 32K_N/32K_P pins to set better initial conditions for the oscillator.
2017-04-24 06:36:47 -04:00
#define DELAY_PLL_ENABLE_WITH_150K 80
#define DELAY_PLL_ENABLE_WITH_32K 160
soc: add source code of rtc_clk, rtc_pm
2017-04-11 03:44:43 -04:00
#define DELAY_FAST_CLK_SWITCH 3
#define DELAY_SLOW_CLK_SWITCH 300
#define DELAY_8M_ENABLE 50
soc/rtc: raise core voltage when 80MHz flash frequency is used To achieve reliable operation with GD flash at 80MHz, need to raise core voltage. This causes the following current consumption increase: At 80MHz: from 29mA to 33mA At 160MHz: from 41mA to 47mA Test conditions: 2 cores running code from IRAM, remaining peripherals clock gated.
2017-11-08 08:13:02 -05:00
/* Core voltage needs to be increased in two cases:
* 1. running at 240 MHz
* 2. running with 80MHz Flash frequency
Fix external start fail
2018-12-22 01:19:46 -05:00
*
feature: add support for setting core voltage in high performance cases. 1. add definitions of EFUSE_RD_VOL_LEVEL_HP_INV in efuse_reg.h 2. modify the core voltage according to the record in efuse in high performance cases.
2019-01-21 05:14:49 -05:00
* There is a record in efuse which indicates the proper voltage for these two cases.
soc/rtc: raise core voltage when 80MHz flash frequency is used To achieve reliable operation with GD flash at 80MHz, need to raise core voltage. This causes the following current consumption increase: At 80MHz: from 29mA to 33mA At 160MHz: from 41mA to 47mA Test conditions: 2 cores running code from IRAM, remaining peripherals clock gated.
2017-11-08 08:13:02 -05:00
*/
feature: add support for setting core voltage in high performance cases. 1. add definitions of EFUSE_RD_VOL_LEVEL_HP_INV in efuse_reg.h 2. modify the core voltage according to the record in efuse in high performance cases.
2019-01-21 05:14:49 -05:00
#define RTC_CNTL_DBIAS_HP_VOLT (RTC_CNTL_DBIAS_1V25 - (REG_GET_FIELD(EFUSE_BLK0_RDATA5_REG, EFUSE_RD_VOL_LEVEL_HP_INV)))
soc/rtc: raise core voltage when 80MHz flash frequency is used To achieve reliable operation with GD flash at 80MHz, need to raise core voltage. This causes the following current consumption increase: At 80MHz: from 29mA to 33mA At 160MHz: from 41mA to 47mA Test conditions: 2 cores running code from IRAM, remaining peripherals clock gated.
2017-11-08 08:13:02 -05:00
#ifdef CONFIG_ESPTOOLPY_FLASHFREQ_80M
feature: add support for setting core voltage in high performance cases. 1. add definitions of EFUSE_RD_VOL_LEVEL_HP_INV in efuse_reg.h 2. modify the core voltage according to the record in efuse in high performance cases.
2019-01-21 05:14:49 -05:00
#define DIG_DBIAS_80M_160M RTC_CNTL_DBIAS_HP_VOLT
soc/rtc: raise core voltage when 80MHz flash frequency is used To achieve reliable operation with GD flash at 80MHz, need to raise core voltage. This causes the following current consumption increase: At 80MHz: from 29mA to 33mA At 160MHz: from 41mA to 47mA Test conditions: 2 cores running code from IRAM, remaining peripherals clock gated.
2017-11-08 08:13:02 -05:00
#else
#define DIG_DBIAS_80M_160M RTC_CNTL_DBIAS_1V10
#endif
feature: add support for setting core voltage in high performance cases. 1. add definitions of EFUSE_RD_VOL_LEVEL_HP_INV in efuse_reg.h 2. modify the core voltage according to the record in efuse in high performance cases.
2019-01-21 05:14:49 -05:00
#define DIG_DBIAS_240M RTC_CNTL_DBIAS_HP_VOLT
soc/rtc: raise core voltage when 80MHz flash frequency is used To achieve reliable operation with GD flash at 80MHz, need to raise core voltage. This causes the following current consumption increase: At 80MHz: from 29mA to 33mA At 160MHz: from 41mA to 47mA Test conditions: 2 cores running code from IRAM, remaining peripherals clock gated.
2017-11-08 08:13:02 -05:00
#define DIG_DBIAS_XTAL RTC_CNTL_DBIAS_1V10
#define DIG_DBIAS_2M RTC_CNTL_DBIAS_1V00
soc/rtc: CPU frequency settings refactoring Previous APIs used to set CPU frequency used CPU frequencies listed in rtc_cpu_freq_t enumeration. This was problematic for two reasons. First, supporting many possible frequency values obtained by dividing XTAL frequency was hard, as every value would have to be listed in the enumeration. Since different base XTAL frequencies are supported, this further complicated things, since not all of these divided frequencies would be valid for any given XTAL frequency. Second, having to deal with enumeration values often involved switch statements to convert between enumeration and MHz values, handle PLL/XTAL frequencies separately, etc. This change introduces rtc_cpu_freq_config_t structure, which contains CPU frequency (in MHz) and information on how this frequency has to be generated: clock source (XTAL/PLL), source frequency, clock divider value. More fields can be added to this structure in the future. This structure simplifies many parts of the code, since both frequency value and frequency generation settings can be accessed in any place in code without the need for conversions. Additionally, this change adds setting of REF_TICK dividers to support frequencies lower then XTAL with DFS.
2018-07-29 03:47:58 -04:00
#define RTC_PLL_FREQ_320M 320
#define RTC_PLL_FREQ_480M 480
soc/rtc: fix switching between 80/160 and 240MHz Previous code contained a check for PLL frequency to be 240MHz, while in fact 240MHz was a CPU frequency; corresponding PLL frequency is 480MHz. Fixed the comparison and replaced integer MHz values with an enum.
2018-03-22 07:02:41 -04:00
tools: Mass fixing of empty prototypes (for -Wstrict-prototypes)
2019-07-16 05:33:30 -04:00
static void rtc_clk_cpu_freq_to_8m(void);
static void rtc_clk_bbpll_disable(void);
static void rtc_clk_bbpll_enable(void);
soc/rtc: CPU frequency settings refactoring Previous APIs used to set CPU frequency used CPU frequencies listed in rtc_cpu_freq_t enumeration. This was problematic for two reasons. First, supporting many possible frequency values obtained by dividing XTAL frequency was hard, as every value would have to be listed in the enumeration. Since different base XTAL frequencies are supported, this further complicated things, since not all of these divided frequencies would be valid for any given XTAL frequency. Second, having to deal with enumeration values often involved switch statements to convert between enumeration and MHz values, handle PLL/XTAL frequencies separately, etc. This change introduces rtc_cpu_freq_config_t structure, which contains CPU frequency (in MHz) and information on how this frequency has to be generated: clock source (XTAL/PLL), source frequency, clock divider value. More fields can be added to this structure in the future. This structure simplifies many parts of the code, since both frequency value and frequency generation settings can be accessed in any place in code without the need for conversions. Additionally, this change adds setting of REF_TICK dividers to support frequencies lower then XTAL with DFS.
2018-07-29 03:47:58 -04:00
static void rtc_clk_cpu_freq_to_pll_mhz(int cpu_freq_mhz);
// Current PLL frequency, in MHZ (320 or 480). Zero if PLL is not enabled.
soc: fix comparison error in soc component Closes https://github.com/espressif/esp-idf/issues/6120
2020-12-01 23:12:31 -05:00
static size_t s_cur_pll_freq;
soc: add source code of rtc_clk, rtc_pm
2017-04-11 03:44:43 -04:00
soc,sdmmc: fix build failures when NDEBUG is used Use explicit error checking instead of asserts, use SOC_LOG to print error/warning messages where needed.
2018-09-24 22:58:43 -04:00
static const char* TAG = "rtc_clk";
soc/rtc: add support for external 32k oscillator Compared to external 32k XTAL, when active oscillator is used as input, some parameters need to be set differently.
2018-08-12 18:10:29 -04:00
static void rtc_clk_32k_enable_common(int dac, int dres, int dbias)
Add support for 32k XTAL as RTC_SLOW_CLK source - RTC_CNTL_SLOWCLK_FREQ define is removed; rtc_clk_slow_freq_get_hz function can be used instead to get an approximate RTC_SLOW_CLK frequency - Clock calibration is performed at startup. The value is saved and used for timekeeping and when entering deep sleep. - When using the 32k XTAL, startup code will wait for the oscillator to start up. This can be possibly optimized by starting a separate task to wait for oscillator startup, and performing clock switch in that task. - Fix a bug that 32k XTAL would be disabled in rtc_clk_init. - Fix a rounding error in rtc_clk_cal, which caused systematic frequency error. - Fix an overflow bug which caused rtc_clk_cal to timeout early if the slow_clk_cycles argument would exceed certain value - Improve 32k XTAL oscillator startup time by introducing bootstrapping code, which uses internal pullup/pulldown resistors on 32K_N/32K_P pins to set better initial conditions for the oscillator.
2017-04-24 06:36:47 -04:00
{
Revert "Merge branch 'bugfix/external_rtc_start_fail' into 'master'" This reverts merge request !2441
2019-02-18 23:39:47 -05:00
CLEAR_PERI_REG_MASK(RTC_IO_XTAL_32K_PAD_REG,
soc/rtc: Bypass touchpad current to external 32k crystal oscillator
2018-05-23 03:24:09 -04:00
RTC_IO_X32P_RDE | RTC_IO_X32P_RUE | RTC_IO_X32N_RUE |
Fix external start fail
2018-12-22 01:19:46 -05:00
RTC_IO_X32N_RDE | RTC_IO_X32N_FUN_IE | RTC_IO_X32P_FUN_IE);
soc/rtc: Bypass touchpad current to external 32k crystal oscillator
2018-05-23 03:24:09 -04:00
SET_PERI_REG_MASK(RTC_IO_XTAL_32K_PAD_REG, RTC_IO_X32N_MUX_SEL | RTC_IO_X32P_MUX_SEL);
/* Set the parameters of xtal
dac --> current
dres --> resistance
dbias --> bais voltage
*/
Add support for 32k XTAL as RTC_SLOW_CLK source - RTC_CNTL_SLOWCLK_FREQ define is removed; rtc_clk_slow_freq_get_hz function can be used instead to get an approximate RTC_SLOW_CLK frequency - Clock calibration is performed at startup. The value is saved and used for timekeeping and when entering deep sleep. - When using the 32k XTAL, startup code will wait for the oscillator to start up. This can be possibly optimized by starting a separate task to wait for oscillator startup, and performing clock switch in that task. - Fix a bug that 32k XTAL would be disabled in rtc_clk_init. - Fix a rounding error in rtc_clk_cal, which caused systematic frequency error. - Fix an overflow bug which caused rtc_clk_cal to timeout early if the slow_clk_cycles argument would exceed certain value - Improve 32k XTAL oscillator startup time by introducing bootstrapping code, which uses internal pullup/pulldown resistors on 32K_N/32K_P pins to set better initial conditions for the oscillator.
2017-04-24 06:36:47 -04:00
REG_SET_FIELD(RTC_IO_XTAL_32K_PAD_REG, RTC_IO_DAC_XTAL_32K, dac);
REG_SET_FIELD(RTC_IO_XTAL_32K_PAD_REG, RTC_IO_DRES_XTAL_32K, dres);
REG_SET_FIELD(RTC_IO_XTAL_32K_PAD_REG, RTC_IO_DBIAS_XTAL_32K, dbias);
soc/rtc: Bypass touchpad current to external 32k crystal oscillator
2018-05-23 03:24:09 -04:00
Rename Kconfig options (components/esp32)
2019-04-30 06:51:55 -04:00
#ifdef CONFIG_ESP32_RTC_EXT_CRYST_ADDIT_CURRENT
Fix external start fail
2018-12-22 01:19:46 -05:00
/* TOUCH sensor can provide additional current to external XTAL.
soc/rtc: Bypass touchpad current to external 32k crystal oscillator
2018-05-23 03:24:09 -04:00
In some case, X32N and X32P PAD don't have enough drive capability to start XTAL */
SET_PERI_REG_MASK(RTC_IO_TOUCH_CFG_REG, RTC_IO_TOUCH_XPD_BIAS_M);
/* Tie PAD Touch8 to VDD
NOTE: TOUCH8 and TOUCH9 register settings are reversed except for DAC, so we set RTC_IO_TOUCH_PAD9_REG here instead
*/
SET_PERI_REG_MASK(RTC_IO_TOUCH_PAD9_REG, RTC_IO_TOUCH_PAD9_TIE_OPT_M);
/* Set the current used to compensate TOUCH PAD8 */
SET_PERI_REG_BITS(RTC_IO_TOUCH_PAD8_REG, RTC_IO_TOUCH_PAD8_DAC, 4, RTC_IO_TOUCH_PAD8_DAC_S);
/* Power up TOUCH8
So the Touch DAC start to drive some current from VDD to TOUCH8(which is also XTAL-N)
*/
SET_PERI_REG_MASK(RTC_IO_TOUCH_PAD9_REG, RTC_IO_TOUCH_PAD9_XPD_M);
Rename Kconfig options (components/esp32)
2019-04-30 06:51:55 -04:00
#endif // CONFIG_ESP32_RTC_EXT_CRYST_ADDIT_CURRENT
soc/rtc: Bypass touchpad current to external 32k crystal oscillator
2018-05-23 03:24:09 -04:00
/* Power up external xtal */
SET_PERI_REG_MASK(RTC_IO_XTAL_32K_PAD_REG, RTC_IO_XPD_XTAL_32K_M);
Add support for 32k XTAL as RTC_SLOW_CLK source - RTC_CNTL_SLOWCLK_FREQ define is removed; rtc_clk_slow_freq_get_hz function can be used instead to get an approximate RTC_SLOW_CLK frequency - Clock calibration is performed at startup. The value is saved and used for timekeeping and when entering deep sleep. - When using the 32k XTAL, startup code will wait for the oscillator to start up. This can be possibly optimized by starting a separate task to wait for oscillator startup, and performing clock switch in that task. - Fix a bug that 32k XTAL would be disabled in rtc_clk_init. - Fix a rounding error in rtc_clk_cal, which caused systematic frequency error. - Fix an overflow bug which caused rtc_clk_cal to timeout early if the slow_clk_cycles argument would exceed certain value - Improve 32k XTAL oscillator startup time by introducing bootstrapping code, which uses internal pullup/pulldown resistors on 32K_N/32K_P pins to set better initial conditions for the oscillator.
2017-04-24 06:36:47 -04:00
}
soc: add source code of rtc_clk, rtc_pm
2017-04-11 03:44:43 -04:00
void rtc_clk_32k_enable(bool enable)
{
if (enable) {
soc/rtc: add support for external 32k oscillator Compared to external 32k XTAL, when active oscillator is used as input, some parameters need to be set differently.
2018-08-12 18:10:29 -04:00
rtc_clk_32k_enable_common(XTAL_32K_DAC_VAL, XTAL_32K_DRES_VAL, XTAL_32K_DBIAS_VAL);
soc: add source code of rtc_clk, rtc_pm
2017-04-11 03:44:43 -04:00
} else {
soc/rtc: Bypass touchpad current to external 32k crystal oscillator
2018-05-23 03:24:09 -04:00
/* Disable X32N and X32P pad drive external xtal */
Fix external start fail
2018-12-22 01:19:46 -05:00
CLEAR_PERI_REG_MASK(RTC_IO_XTAL_32K_PAD_REG, RTC_IO_XPD_XTAL_32K_M);
CLEAR_PERI_REG_MASK(RTC_IO_XTAL_32K_PAD_REG, RTC_IO_X32N_MUX_SEL | RTC_IO_X32P_MUX_SEL);
Rename Kconfig options (components/esp32)
2019-04-30 06:51:55 -04:00
#ifdef CONFIG_ESP32_RTC_EXT_CRYST_ADDIT_CURRENT
soc/rtc: Bypass touchpad current to external 32k crystal oscillator
2018-05-23 03:24:09 -04:00
/* Power down TOUCH */
CLEAR_PERI_REG_MASK(RTC_IO_TOUCH_PAD9_REG, RTC_IO_TOUCH_PAD9_XPD_M);
Rename Kconfig options (components/esp32)
2019-04-30 06:51:55 -04:00
#endif // CONFIG_ESP32_RTC_EXT_CRYST_ADDIT_CURRENT
soc: add source code of rtc_clk, rtc_pm
2017-04-11 03:44:43 -04:00
}
}
tools: Mass fixing of empty prototypes (for -Wstrict-prototypes)
2019-07-16 05:33:30 -04:00
void rtc_clk_32k_enable_external(void)
soc/rtc: add support for external 32k oscillator Compared to external 32k XTAL, when active oscillator is used as input, some parameters need to be set differently.
2018-08-12 18:10:29 -04:00
{
rtc_clk_32k_enable_common(XTAL_32K_EXT_DAC_VAL, XTAL_32K_EXT_DRES_VAL, XTAL_32K_EXT_DBIAS_VAL);
}
bugfix/rtc_clk_32k_bootstrap: Fix starting 32k RTC 1. External 32kHz crystal is started for too long or it may not start at all. It is often observed at the first start. 2. At the first start, it is possible that the crystal did not start. And the recorded period was recorded as 0. Which led to a division error by zero during the transition to the deep sleep mode (Maybe somewhere else). 3. Added a unit test to test a new method of oscillation an external crystal. 4. Added a new method of oscillating of an external crystal. The legs of the crystal are fed with a 32 kHz frequency. The new method eliminates these errors. Added unit test: `\esp-idf\components\soc\esp32\test\test_rtc_clk.c`: `make TEST_COMPONENTS=soc` - 8 Test starting external RTC crystal. Will pass. `Bootstrap cycles for external 32kHz crystal` - is specified in the file Kconfig by default 100. QA tested a new method of oscillation the crystal on 25 boards. The supply of square waves on the crystal showed a 100% result in contrast to the previous method of launching the crystal. After the tests, the old method was deleted. Closes TW19143
2018-03-19 04:05:32 -04:00
/* Helping external 32kHz crystal to start up.
* External crystal connected to outputs GPIO32 GPIO33.
* Forms N pulses with a frequency of about 32KHz on the outputs of the crystal.
*/
void rtc_clk_32k_bootstrap(uint32_t cycle)
Add support for 32k XTAL as RTC_SLOW_CLK source - RTC_CNTL_SLOWCLK_FREQ define is removed; rtc_clk_slow_freq_get_hz function can be used instead to get an approximate RTC_SLOW_CLK frequency - Clock calibration is performed at startup. The value is saved and used for timekeeping and when entering deep sleep. - When using the 32k XTAL, startup code will wait for the oscillator to start up. This can be possibly optimized by starting a separate task to wait for oscillator startup, and performing clock switch in that task. - Fix a bug that 32k XTAL would be disabled in rtc_clk_init. - Fix a rounding error in rtc_clk_cal, which caused systematic frequency error. - Fix an overflow bug which caused rtc_clk_cal to timeout early if the slow_clk_cycles argument would exceed certain value - Improve 32k XTAL oscillator startup time by introducing bootstrapping code, which uses internal pullup/pulldown resistors on 32K_N/32K_P pins to set better initial conditions for the oscillator.
2017-04-24 06:36:47 -04:00
{
bugfix/rtc_clk_32k_bootstrap: Fix starting 32k RTC 1. External 32kHz crystal is started for too long or it may not start at all. It is often observed at the first start. 2. At the first start, it is possible that the crystal did not start. And the recorded period was recorded as 0. Which led to a division error by zero during the transition to the deep sleep mode (Maybe somewhere else). 3. Added a unit test to test a new method of oscillation an external crystal. 4. Added a new method of oscillating of an external crystal. The legs of the crystal are fed with a 32 kHz frequency. The new method eliminates these errors. Added unit test: `\esp-idf\components\soc\esp32\test\test_rtc_clk.c`: `make TEST_COMPONENTS=soc` - 8 Test starting external RTC crystal. Will pass. `Bootstrap cycles for external 32kHz crystal` - is specified in the file Kconfig by default 100. QA tested a new method of oscillation the crystal on 25 boards. The supply of square waves on the crystal showed a 100% result in contrast to the previous method of launching the crystal. After the tests, the old method was deleted. Closes TW19143
2018-03-19 04:05:32 -04:00
if (cycle){
const uint32_t pin_32 = 32;
const uint32_t pin_33 = 33;
const uint32_t mask_32 = (1 << (pin_32 - 32));
const uint32_t mask_33 = (1 << (pin_33 - 32));
gpio_pad_select_gpio(pin_32);
gpio_pad_select_gpio(pin_33);
gpio_output_set_high(mask_32, mask_33, mask_32 | mask_33, 0);
const uint32_t delay_us = (1000000 / RTC_SLOW_CLK_FREQ_32K / 2);
while(cycle){
gpio_output_set_high(mask_32, mask_33, mask_32 | mask_33, 0);
ets_delay_us(delay_us);
gpio_output_set_high(mask_33, mask_32, mask_32 | mask_33, 0);
ets_delay_us(delay_us);
cycle--;
}
gpio_output_set_high(0, 0, 0, mask_32 | mask_33); // disable pins
}
Add support for 32k XTAL as RTC_SLOW_CLK source - RTC_CNTL_SLOWCLK_FREQ define is removed; rtc_clk_slow_freq_get_hz function can be used instead to get an approximate RTC_SLOW_CLK frequency - Clock calibration is performed at startup. The value is saved and used for timekeeping and when entering deep sleep. - When using the 32k XTAL, startup code will wait for the oscillator to start up. This can be possibly optimized by starting a separate task to wait for oscillator startup, and performing clock switch in that task. - Fix a bug that 32k XTAL would be disabled in rtc_clk_init. - Fix a rounding error in rtc_clk_cal, which caused systematic frequency error. - Fix an overflow bug which caused rtc_clk_cal to timeout early if the slow_clk_cycles argument would exceed certain value - Improve 32k XTAL oscillator startup time by introducing bootstrapping code, which uses internal pullup/pulldown resistors on 32K_N/32K_P pins to set better initial conditions for the oscillator.
2017-04-24 06:36:47 -04:00
CLEAR_PERI_REG_MASK(RTC_IO_XTAL_32K_PAD_REG, RTC_IO_XPD_XTAL_32K);
SET_PERI_REG_MASK(RTC_IO_XTAL_32K_PAD_REG, RTC_IO_X32P_RUE | RTC_IO_X32N_RDE);
ets_delay_us(XTAL_32K_BOOTSTRAP_TIME_US);
bugfix/rtc_clk_32k_bootstrap: Fix starting 32k RTC 1. External 32kHz crystal is started for too long or it may not start at all. It is often observed at the first start. 2. At the first start, it is possible that the crystal did not start. And the recorded period was recorded as 0. Which led to a division error by zero during the transition to the deep sleep mode (Maybe somewhere else). 3. Added a unit test to test a new method of oscillation an external crystal. 4. Added a new method of oscillating of an external crystal. The legs of the crystal are fed with a 32 kHz frequency. The new method eliminates these errors. Added unit test: `\esp-idf\components\soc\esp32\test\test_rtc_clk.c`: `make TEST_COMPONENTS=soc` - 8 Test starting external RTC crystal. Will pass. `Bootstrap cycles for external 32kHz crystal` - is specified in the file Kconfig by default 100. QA tested a new method of oscillation the crystal on 25 boards. The supply of square waves on the crystal showed a 100% result in contrast to the previous method of launching the crystal. After the tests, the old method was deleted. Closes TW19143
2018-03-19 04:05:32 -04:00
soc/rtc: add support for external 32k oscillator Compared to external 32k XTAL, when active oscillator is used as input, some parameters need to be set differently.
2018-08-12 18:10:29 -04:00
rtc_clk_32k_enable_common(XTAL_32K_BOOTSTRAP_DAC_VAL,
Add support for 32k XTAL as RTC_SLOW_CLK source - RTC_CNTL_SLOWCLK_FREQ define is removed; rtc_clk_slow_freq_get_hz function can be used instead to get an approximate RTC_SLOW_CLK frequency - Clock calibration is performed at startup. The value is saved and used for timekeeping and when entering deep sleep. - When using the 32k XTAL, startup code will wait for the oscillator to start up. This can be possibly optimized by starting a separate task to wait for oscillator startup, and performing clock switch in that task. - Fix a bug that 32k XTAL would be disabled in rtc_clk_init. - Fix a rounding error in rtc_clk_cal, which caused systematic frequency error. - Fix an overflow bug which caused rtc_clk_cal to timeout early if the slow_clk_cycles argument would exceed certain value - Improve 32k XTAL oscillator startup time by introducing bootstrapping code, which uses internal pullup/pulldown resistors on 32K_N/32K_P pins to set better initial conditions for the oscillator.
2017-04-24 06:36:47 -04:00
XTAL_32K_BOOTSTRAP_DRES_VAL, XTAL_32K_BOOTSTRAP_DBIAS_VAL);
}
tools: Mass fixing of empty prototypes (for -Wstrict-prototypes)
2019-07-16 05:33:30 -04:00
bool rtc_clk_32k_enabled(void)
soc: add source code of rtc_clk, rtc_pm
2017-04-11 03:44:43 -04:00
{
return GET_PERI_REG_MASK(RTC_IO_XTAL_32K_PAD_REG, RTC_IO_XPD_XTAL_32K) != 0;
}
void rtc_clk_8m_enable(bool clk_8m_en, bool d256_en)
{
if (clk_8m_en) {
CLEAR_PERI_REG_MASK(RTC_CNTL_CLK_CONF_REG, RTC_CNTL_ENB_CK8M);
/* no need to wait once enabled by software */
REG_SET_FIELD(RTC_CNTL_TIMER1_REG, RTC_CNTL_CK8M_WAIT, 1);
if (d256_en) {
CLEAR_PERI_REG_MASK(RTC_CNTL_CLK_CONF_REG, RTC_CNTL_ENB_CK8M_DIV);
} else {
SET_PERI_REG_MASK(RTC_CNTL_CLK_CONF_REG, RTC_CNTL_ENB_CK8M_DIV);
}
ets_delay_us(DELAY_8M_ENABLE);
} else {
SET_PERI_REG_MASK(RTC_CNTL_CLK_CONF_REG, RTC_CNTL_ENB_CK8M);
REG_SET_FIELD(RTC_CNTL_TIMER1_REG, RTC_CNTL_CK8M_WAIT, RTC_CNTL_CK8M_WAIT_DEFAULT);
}
}
tools: Mass fixing of empty prototypes (for -Wstrict-prototypes)
2019-07-16 05:33:30 -04:00
bool rtc_clk_8m_enabled(void)
soc: add source code of rtc_clk, rtc_pm
2017-04-11 03:44:43 -04:00
{
return GET_PERI_REG_MASK(RTC_CNTL_CLK_CONF_REG, RTC_CNTL_ENB_CK8M) == 0;
}
tools: Mass fixing of empty prototypes (for -Wstrict-prototypes)
2019-07-16 05:33:30 -04:00
bool rtc_clk_8md256_enabled(void)
soc: add source code of rtc_clk, rtc_pm
2017-04-11 03:44:43 -04:00
{
return GET_PERI_REG_MASK(RTC_CNTL_CLK_CONF_REG, RTC_CNTL_ENB_CK8M_DIV) == 0;
}
void rtc_clk_apll_enable(bool enable, uint32_t sdm0, uint32_t sdm1, uint32_t sdm2, uint32_t o_div)
{
REG_SET_FIELD(RTC_CNTL_ANA_CONF_REG, RTC_CNTL_PLLA_FORCE_PD, enable ? 0 : 1);
REG_SET_FIELD(RTC_CNTL_ANA_CONF_REG, RTC_CNTL_PLLA_FORCE_PU, enable ? 1 : 0);
if (!enable &&
REG_GET_FIELD(RTC_CNTL_CLK_CONF_REG, RTC_CNTL_SOC_CLK_SEL) != RTC_CNTL_SOC_CLK_SEL_PLL) {
soc/rtc: don't power down BIAS_I2C along with APLL if other PLL is used If enable == false, and SOC_CLK_SEL == PLL, the code would would erroneously set RTC_CNTL_BIAS_I2C_FORCE_PD. This change fixes the logic.
2017-11-20 02:27:16 -05:00
REG_SET_BIT(RTC_CNTL_OPTIONS0_REG, RTC_CNTL_BIAS_I2C_FORCE_PD);
} else {
REG_CLR_BIT(RTC_CNTL_OPTIONS0_REG, RTC_CNTL_BIAS_I2C_FORCE_PD);
soc: add source code of rtc_clk, rtc_pm
2017-04-11 03:44:43 -04:00
}
if (enable) {
uint8_t sdm_stop_val_2 = APLL_SDM_STOP_VAL_2_REV1;
uint32_t is_rev0 = (GET_PERI_REG_BITS2(EFUSE_BLK0_RDATA3_REG, 1, 15) == 0);
if (is_rev0) {
sdm0 = 0;
sdm1 = 0;
sdm_stop_val_2 = APLL_SDM_STOP_VAL_2_REV0;
}
I2C_WRITEREG_MASK_RTC(I2C_APLL, I2C_APLL_DSDM2, sdm2);
I2C_WRITEREG_MASK_RTC(I2C_APLL, I2C_APLL_DSDM0, sdm0);
I2C_WRITEREG_MASK_RTC(I2C_APLL, I2C_APLL_DSDM1, sdm1);
I2C_WRITEREG_RTC(I2C_APLL, I2C_APLL_SDM_STOP, APLL_SDM_STOP_VAL_1);
I2C_WRITEREG_RTC(I2C_APLL, I2C_APLL_SDM_STOP, sdm_stop_val_2);
I2C_WRITEREG_MASK_RTC(I2C_APLL, I2C_APLL_OR_OUTPUT_DIV, o_div);
/* calibration */
I2C_WRITEREG_RTC(I2C_APLL, I2C_APLL_IR_CAL_DELAY, APLL_CAL_DELAY_1);
I2C_WRITEREG_RTC(I2C_APLL, I2C_APLL_IR_CAL_DELAY, APLL_CAL_DELAY_2);
I2C_WRITEREG_RTC(I2C_APLL, I2C_APLL_IR_CAL_DELAY, APLL_CAL_DELAY_3);
/* wait for calibration end */
while (!(I2C_READREG_MASK_RTC(I2C_APLL, I2C_APLL_OR_CAL_END))) {
/* use ets_delay_us so the RTC bus doesn't get flooded */
ets_delay_us(1);
}
}
}
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);
component/bt: implement bluetooth modem sleep mode, one mode for BLE only and another for dual mode bluetooth 1. provide options for bluetooth low power mode 2. provide two options for bluetooth low power clock: main XTAL and external 32kHz XTAL 3. provide function and callbacks to control bluetooth low power mode, including enable/disable sleep, software wakeup request, low power clock settings, check power state, etc 4. modify vhci API vhci_host_send_packet to use blocking mode 5. note that DFS and bluetooth modem sleep can not be used together currently.
2018-04-08 07:19:47 -04:00
REG_SET_FIELD(RTC_CNTL_CLK_CONF_REG, RTC_CNTL_DIG_XTAL32K_EN,
(slow_freq == RTC_SLOW_FREQ_32K_XTAL) ? 1 : 0);
soc: add source code of rtc_clk, rtc_pm
2017-04-11 03:44:43 -04:00
ets_delay_us(DELAY_SLOW_CLK_SWITCH);
}
tools: Mass fixing of empty prototypes (for -Wstrict-prototypes)
2019-07-16 05:33:30 -04:00
rtc_slow_freq_t rtc_clk_slow_freq_get(void)
soc: add source code of rtc_clk, rtc_pm
2017-04-11 03:44:43 -04:00
{
return REG_GET_FIELD(RTC_CNTL_CLK_CONF_REG, RTC_CNTL_ANA_CLK_RTC_SEL);
}
tools: Mass fixing of empty prototypes (for -Wstrict-prototypes)
2019-07-16 05:33:30 -04:00
uint32_t rtc_clk_slow_freq_get_hz(void)
Add support for 32k XTAL as RTC_SLOW_CLK source - RTC_CNTL_SLOWCLK_FREQ define is removed; rtc_clk_slow_freq_get_hz function can be used instead to get an approximate RTC_SLOW_CLK frequency - Clock calibration is performed at startup. The value is saved and used for timekeeping and when entering deep sleep. - When using the 32k XTAL, startup code will wait for the oscillator to start up. This can be possibly optimized by starting a separate task to wait for oscillator startup, and performing clock switch in that task. - Fix a bug that 32k XTAL would be disabled in rtc_clk_init. - Fix a rounding error in rtc_clk_cal, which caused systematic frequency error. - Fix an overflow bug which caused rtc_clk_cal to timeout early if the slow_clk_cycles argument would exceed certain value - Improve 32k XTAL oscillator startup time by introducing bootstrapping code, which uses internal pullup/pulldown resistors on 32K_N/32K_P pins to set better initial conditions for the oscillator.
2017-04-24 06:36:47 -04:00
{
switch(rtc_clk_slow_freq_get()) {
case RTC_SLOW_FREQ_RTC: return RTC_SLOW_CLK_FREQ_150K;
case RTC_SLOW_FREQ_32K_XTAL: return RTC_SLOW_CLK_FREQ_32K;
case RTC_SLOW_FREQ_8MD256: return RTC_SLOW_CLK_FREQ_8MD256;
}
return 0;
}
soc: add source code of rtc_clk, rtc_pm
2017-04-11 03:44:43 -04:00
void rtc_clk_fast_freq_set(rtc_fast_freq_t fast_freq)
{
REG_SET_FIELD(RTC_CNTL_CLK_CONF_REG, RTC_CNTL_FAST_CLK_RTC_SEL, fast_freq);
ets_delay_us(DELAY_FAST_CLK_SWITCH);
}
tools: Mass fixing of empty prototypes (for -Wstrict-prototypes)
2019-07-16 05:33:30 -04:00
rtc_fast_freq_t rtc_clk_fast_freq_get(void)
soc: add source code of rtc_clk, rtc_pm
2017-04-11 03:44:43 -04:00
{
return REG_GET_FIELD(RTC_CNTL_CLK_CONF_REG, RTC_CNTL_FAST_CLK_RTC_SEL);
}
soc/rtc: CPU frequency settings refactoring Previous APIs used to set CPU frequency used CPU frequencies listed in rtc_cpu_freq_t enumeration. This was problematic for two reasons. First, supporting many possible frequency values obtained by dividing XTAL frequency was hard, as every value would have to be listed in the enumeration. Since different base XTAL frequencies are supported, this further complicated things, since not all of these divided frequencies would be valid for any given XTAL frequency. Second, having to deal with enumeration values often involved switch statements to convert between enumeration and MHz values, handle PLL/XTAL frequencies separately, etc. This change introduces rtc_cpu_freq_config_t structure, which contains CPU frequency (in MHz) and information on how this frequency has to be generated: clock source (XTAL/PLL), source frequency, clock divider value. More fields can be added to this structure in the future. This structure simplifies many parts of the code, since both frequency value and frequency generation settings can be accessed in any place in code without the need for conversions. Additionally, this change adds setting of REF_TICK dividers to support frequencies lower then XTAL with DFS.
2018-07-29 03:47:58 -04:00
void rtc_clk_bbpll_configure(rtc_xtal_freq_t xtal_freq, int pll_freq)
soc: add source code of rtc_clk, rtc_pm
2017-04-11 03:44:43 -04:00
{
uint8_t div_ref;
uint8_t div7_0;
uint8_t div10_8;
uint8_t lref;
uint8_t dcur;
uint8_t bw;
soc/rtc: CPU frequency settings refactoring Previous APIs used to set CPU frequency used CPU frequencies listed in rtc_cpu_freq_t enumeration. This was problematic for two reasons. First, supporting many possible frequency values obtained by dividing XTAL frequency was hard, as every value would have to be listed in the enumeration. Since different base XTAL frequencies are supported, this further complicated things, since not all of these divided frequencies would be valid for any given XTAL frequency. Second, having to deal with enumeration values often involved switch statements to convert between enumeration and MHz values, handle PLL/XTAL frequencies separately, etc. This change introduces rtc_cpu_freq_config_t structure, which contains CPU frequency (in MHz) and information on how this frequency has to be generated: clock source (XTAL/PLL), source frequency, clock divider value. More fields can be added to this structure in the future. This structure simplifies many parts of the code, since both frequency value and frequency generation settings can be accessed in any place in code without the need for conversions. Additionally, this change adds setting of REF_TICK dividers to support frequencies lower then XTAL with DFS.
2018-07-29 03:47:58 -04:00
if (pll_freq == RTC_PLL_FREQ_320M) {
soc/rtc: raise core voltage when 80MHz flash frequency is used To achieve reliable operation with GD flash at 80MHz, need to raise core voltage. This causes the following current consumption increase: At 80MHz: from 29mA to 33mA At 160MHz: from 41mA to 47mA Test conditions: 2 cores running code from IRAM, remaining peripherals clock gated.
2017-11-08 08:13:02 -05:00
/* Raise the voltage, if needed */
REG_SET_FIELD(RTC_CNTL_REG, RTC_CNTL_DIG_DBIAS_WAK, DIG_DBIAS_80M_160M);
soc: add source code of rtc_clk, rtc_pm
2017-04-11 03:44:43 -04:00
/* Configure 320M PLL */
switch (xtal_freq) {
case RTC_XTAL_FREQ_40M:
div_ref = 0;
div7_0 = 32;
div10_8 = 0;
lref = 0;
dcur = 6;
bw = 3;
break;
case RTC_XTAL_FREQ_26M:
div_ref = 12;
div7_0 = 224;
div10_8 = 4;
lref = 1;
dcur = 0;
bw = 1;
break;
case RTC_XTAL_FREQ_24M:
div_ref = 11;
div7_0 = 224;
div10_8 = 4;
lref = 1;
dcur = 0;
bw = 1;
break;
default:
div_ref = 12;
div7_0 = 224;
div10_8 = 4;
lref = 0;
dcur = 0;
bw = 0;
break;
}
I2C_WRITEREG_RTC(I2C_BBPLL, I2C_BBPLL_ENDIV5, BBPLL_ENDIV5_VAL_320M);
I2C_WRITEREG_RTC(I2C_BBPLL, I2C_BBPLL_BBADC_DSMP, BBPLL_BBADC_DSMP_VAL_320M);
} else {
/* Raise the voltage */
soc/rtc: raise core voltage when 80MHz flash frequency is used To achieve reliable operation with GD flash at 80MHz, need to raise core voltage. This causes the following current consumption increase: At 80MHz: from 29mA to 33mA At 160MHz: from 41mA to 47mA Test conditions: 2 cores running code from IRAM, remaining peripherals clock gated.
2017-11-08 08:13:02 -05:00
REG_SET_FIELD(RTC_CNTL_REG, RTC_CNTL_DIG_DBIAS_WAK, DIG_DBIAS_240M);
soc: add source code of rtc_clk, rtc_pm
2017-04-11 03:44:43 -04:00
ets_delay_us(DELAY_PLL_DBIAS_RAISE);
/* Configure 480M PLL */
switch (xtal_freq) {
case RTC_XTAL_FREQ_40M:
div_ref = 0;
div7_0 = 28;
div10_8 = 0;
lref = 0;
dcur = 6;
bw = 3;
break;
case RTC_XTAL_FREQ_26M:
div_ref = 12;
div7_0 = 144;
div10_8 = 4;
lref = 1;
dcur = 0;
bw = 1;
break;
case RTC_XTAL_FREQ_24M:
div_ref = 11;
div7_0 = 144;
div10_8 = 4;
lref = 1;
dcur = 0;
bw = 1;
break;
default:
div_ref = 12;
div7_0 = 224;
div10_8 = 4;
lref = 0;
dcur = 0;
bw = 0;
break;
}
I2C_WRITEREG_RTC(I2C_BBPLL, I2C_BBPLL_ENDIV5, BBPLL_ENDIV5_VAL_480M);
I2C_WRITEREG_RTC(I2C_BBPLL, I2C_BBPLL_BBADC_DSMP, BBPLL_BBADC_DSMP_VAL_480M);
}
uint8_t i2c_bbpll_lref = (lref << 7) | (div10_8 << 4) | (div_ref);
uint8_t i2c_bbpll_div_7_0 = div7_0;
uint8_t i2c_bbpll_dcur = (bw << 6) | dcur;
I2C_WRITEREG_RTC(I2C_BBPLL, I2C_BBPLL_OC_LREF, i2c_bbpll_lref);
I2C_WRITEREG_RTC(I2C_BBPLL, I2C_BBPLL_OC_DIV_7_0, i2c_bbpll_div_7_0);
I2C_WRITEREG_RTC(I2C_BBPLL, I2C_BBPLL_OC_DCUR, i2c_bbpll_dcur);
Add support for 32k XTAL as RTC_SLOW_CLK source - RTC_CNTL_SLOWCLK_FREQ define is removed; rtc_clk_slow_freq_get_hz function can be used instead to get an approximate RTC_SLOW_CLK frequency - Clock calibration is performed at startup. The value is saved and used for timekeeping and when entering deep sleep. - When using the 32k XTAL, startup code will wait for the oscillator to start up. This can be possibly optimized by starting a separate task to wait for oscillator startup, and performing clock switch in that task. - Fix a bug that 32k XTAL would be disabled in rtc_clk_init. - Fix a rounding error in rtc_clk_cal, which caused systematic frequency error. - Fix an overflow bug which caused rtc_clk_cal to timeout early if the slow_clk_cycles argument would exceed certain value - Improve 32k XTAL oscillator startup time by introducing bootstrapping code, which uses internal pullup/pulldown resistors on 32K_N/32K_P pins to set better initial conditions for the oscillator.
2017-04-24 06:36:47 -04:00
uint32_t delay_pll_en = (rtc_clk_slow_freq_get() == RTC_SLOW_FREQ_RTC) ?
DELAY_PLL_ENABLE_WITH_150K : DELAY_PLL_ENABLE_WITH_32K;
ets_delay_us(delay_pll_en);
soc/rtc: CPU frequency settings refactoring Previous APIs used to set CPU frequency used CPU frequencies listed in rtc_cpu_freq_t enumeration. This was problematic for two reasons. First, supporting many possible frequency values obtained by dividing XTAL frequency was hard, as every value would have to be listed in the enumeration. Since different base XTAL frequencies are supported, this further complicated things, since not all of these divided frequencies would be valid for any given XTAL frequency. Second, having to deal with enumeration values often involved switch statements to convert between enumeration and MHz values, handle PLL/XTAL frequencies separately, etc. This change introduces rtc_cpu_freq_config_t structure, which contains CPU frequency (in MHz) and information on how this frequency has to be generated: clock source (XTAL/PLL), source frequency, clock divider value. More fields can be added to this structure in the future. This structure simplifies many parts of the code, since both frequency value and frequency generation settings can be accessed in any place in code without the need for conversions. Additionally, this change adds setting of REF_TICK dividers to support frequencies lower then XTAL with DFS.
2018-07-29 03:47:58 -04:00
s_cur_pll_freq = pll_freq;
soc: add source code of rtc_clk, rtc_pm
2017-04-11 03:44:43 -04:00
}
soc/rtc: add fast paths for switching between PLL and XTAL
2017-08-21 10:34:42 -04:00
/**
* Switch to XTAL frequency. Does not disable the PLL.
*/
soc/rtc_clk: split rtc_clk_init into separate object file rtc_clk_init and related functions don’t need to be in IRAM/DRAM.
2018-07-29 01:24:20 -04:00
void rtc_clk_cpu_freq_to_xtal(int freq, int div)
soc/rtc: add fast paths for switching between PLL and XTAL
2017-08-21 10:34:42 -04:00
{
soc/rtc: CPU frequency settings refactoring Previous APIs used to set CPU frequency used CPU frequencies listed in rtc_cpu_freq_t enumeration. This was problematic for two reasons. First, supporting many possible frequency values obtained by dividing XTAL frequency was hard, as every value would have to be listed in the enumeration. Since different base XTAL frequencies are supported, this further complicated things, since not all of these divided frequencies would be valid for any given XTAL frequency. Second, having to deal with enumeration values often involved switch statements to convert between enumeration and MHz values, handle PLL/XTAL frequencies separately, etc. This change introduces rtc_cpu_freq_config_t structure, which contains CPU frequency (in MHz) and information on how this frequency has to be generated: clock source (XTAL/PLL), source frequency, clock divider value. More fields can be added to this structure in the future. This structure simplifies many parts of the code, since both frequency value and frequency generation settings can be accessed in any place in code without the need for conversions. Additionally, this change adds setting of REF_TICK dividers to support frequencies lower then XTAL with DFS.
2018-07-29 03:47:58 -04:00
ets_update_cpu_frequency(freq);
/* set divider from XTAL to APB clock */
REG_SET_FIELD(APB_CTRL_SYSCLK_CONF_REG, APB_CTRL_PRE_DIV_CNT, div - 1);
/* adjust ref_tick */
REG_WRITE(APB_CTRL_XTAL_TICK_CONF_REG, freq * MHZ / REF_CLK_FREQ - 1);
/* switch clock source */
REG_SET_FIELD(RTC_CNTL_CLK_CONF_REG, RTC_CNTL_SOC_CLK_SEL, RTC_CNTL_SOC_CLK_SEL_XTL);
rtc_clk_apb_freq_update(freq * MHZ);
/* lower the voltage */
if (freq <= 2) {
REG_SET_FIELD(RTC_CNTL_REG, RTC_CNTL_DIG_DBIAS_WAK, DIG_DBIAS_2M);
} else {
REG_SET_FIELD(RTC_CNTL_REG, RTC_CNTL_DIG_DBIAS_WAK, DIG_DBIAS_XTAL);
}
}
tools: Mass fixing of empty prototypes (for -Wstrict-prototypes)
2019-07-16 05:33:30 -04:00
static void rtc_clk_cpu_freq_to_8m(void)
soc/rtc: CPU frequency settings refactoring Previous APIs used to set CPU frequency used CPU frequencies listed in rtc_cpu_freq_t enumeration. This was problematic for two reasons. First, supporting many possible frequency values obtained by dividing XTAL frequency was hard, as every value would have to be listed in the enumeration. Since different base XTAL frequencies are supported, this further complicated things, since not all of these divided frequencies would be valid for any given XTAL frequency. Second, having to deal with enumeration values often involved switch statements to convert between enumeration and MHz values, handle PLL/XTAL frequencies separately, etc. This change introduces rtc_cpu_freq_config_t structure, which contains CPU frequency (in MHz) and information on how this frequency has to be generated: clock source (XTAL/PLL), source frequency, clock divider value. More fields can be added to this structure in the future. This structure simplifies many parts of the code, since both frequency value and frequency generation settings can be accessed in any place in code without the need for conversions. Additionally, this change adds setting of REF_TICK dividers to support frequencies lower then XTAL with DFS.
2018-07-29 03:47:58 -04:00
{
ets_update_cpu_frequency(8);
soc/rtc: raise core voltage when 80MHz flash frequency is used To achieve reliable operation with GD flash at 80MHz, need to raise core voltage. This causes the following current consumption increase: At 80MHz: from 29mA to 33mA At 160MHz: from 41mA to 47mA Test conditions: 2 cores running code from IRAM, remaining peripherals clock gated.
2017-11-08 08:13:02 -05:00
REG_SET_FIELD(RTC_CNTL_REG, RTC_CNTL_DIG_DBIAS_WAK, DIG_DBIAS_XTAL);
soc/rtc: add fast paths for switching between PLL and XTAL
2017-08-21 10:34:42 -04:00
REG_SET_FIELD(APB_CTRL_SYSCLK_CONF_REG, APB_CTRL_PRE_DIV_CNT, 0);
soc/rtc: CPU frequency settings refactoring Previous APIs used to set CPU frequency used CPU frequencies listed in rtc_cpu_freq_t enumeration. This was problematic for two reasons. First, supporting many possible frequency values obtained by dividing XTAL frequency was hard, as every value would have to be listed in the enumeration. Since different base XTAL frequencies are supported, this further complicated things, since not all of these divided frequencies would be valid for any given XTAL frequency. Second, having to deal with enumeration values often involved switch statements to convert between enumeration and MHz values, handle PLL/XTAL frequencies separately, etc. This change introduces rtc_cpu_freq_config_t structure, which contains CPU frequency (in MHz) and information on how this frequency has to be generated: clock source (XTAL/PLL), source frequency, clock divider value. More fields can be added to this structure in the future. This structure simplifies many parts of the code, since both frequency value and frequency generation settings can be accessed in any place in code without the need for conversions. Additionally, this change adds setting of REF_TICK dividers to support frequencies lower then XTAL with DFS.
2018-07-29 03:47:58 -04:00
REG_SET_FIELD(RTC_CNTL_CLK_CONF_REG, RTC_CNTL_SOC_CLK_SEL, RTC_CNTL_SOC_CLK_SEL_8M);
rtc_clk_apb_freq_update(RTC_FAST_CLK_FREQ_8M);
}
soc/rtc: add fast paths for switching between PLL and XTAL
2017-08-21 10:34:42 -04:00
tools: Mass fixing of empty prototypes (for -Wstrict-prototypes)
2019-07-16 05:33:30 -04:00
static void rtc_clk_bbpll_disable(void)
soc/rtc: CPU frequency settings refactoring Previous APIs used to set CPU frequency used CPU frequencies listed in rtc_cpu_freq_t enumeration. This was problematic for two reasons. First, supporting many possible frequency values obtained by dividing XTAL frequency was hard, as every value would have to be listed in the enumeration. Since different base XTAL frequencies are supported, this further complicated things, since not all of these divided frequencies would be valid for any given XTAL frequency. Second, having to deal with enumeration values often involved switch statements to convert between enumeration and MHz values, handle PLL/XTAL frequencies separately, etc. This change introduces rtc_cpu_freq_config_t structure, which contains CPU frequency (in MHz) and information on how this frequency has to be generated: clock source (XTAL/PLL), source frequency, clock divider value. More fields can be added to this structure in the future. This structure simplifies many parts of the code, since both frequency value and frequency generation settings can be accessed in any place in code without the need for conversions. Additionally, this change adds setting of REF_TICK dividers to support frequencies lower then XTAL with DFS.
2018-07-29 03:47:58 -04:00
{
SET_PERI_REG_MASK(RTC_CNTL_OPTIONS0_REG,
RTC_CNTL_BB_I2C_FORCE_PD | RTC_CNTL_BBPLL_FORCE_PD |
RTC_CNTL_BBPLL_I2C_FORCE_PD);
s_cur_pll_freq = 0;
/* is APLL under force power down? */
uint32_t apll_fpd = REG_GET_FIELD(RTC_CNTL_ANA_CONF_REG, RTC_CNTL_PLLA_FORCE_PD);
if (apll_fpd) {
/* then also power down the internal I2C bus */
SET_PERI_REG_MASK(RTC_CNTL_OPTIONS0_REG, RTC_CNTL_BIAS_I2C_FORCE_PD);
}
}
tools: Mass fixing of empty prototypes (for -Wstrict-prototypes)
2019-07-16 05:33:30 -04:00
static void rtc_clk_bbpll_enable(void)
soc/rtc: CPU frequency settings refactoring Previous APIs used to set CPU frequency used CPU frequencies listed in rtc_cpu_freq_t enumeration. This was problematic for two reasons. First, supporting many possible frequency values obtained by dividing XTAL frequency was hard, as every value would have to be listed in the enumeration. Since different base XTAL frequencies are supported, this further complicated things, since not all of these divided frequencies would be valid for any given XTAL frequency. Second, having to deal with enumeration values often involved switch statements to convert between enumeration and MHz values, handle PLL/XTAL frequencies separately, etc. This change introduces rtc_cpu_freq_config_t structure, which contains CPU frequency (in MHz) and information on how this frequency has to be generated: clock source (XTAL/PLL), source frequency, clock divider value. More fields can be added to this structure in the future. This structure simplifies many parts of the code, since both frequency value and frequency generation settings can be accessed in any place in code without the need for conversions. Additionally, this change adds setting of REF_TICK dividers to support frequencies lower then XTAL with DFS.
2018-07-29 03:47:58 -04:00
{
CLEAR_PERI_REG_MASK(RTC_CNTL_OPTIONS0_REG,
RTC_CNTL_BIAS_I2C_FORCE_PD | RTC_CNTL_BB_I2C_FORCE_PD |
RTC_CNTL_BBPLL_FORCE_PD | RTC_CNTL_BBPLL_I2C_FORCE_PD);
soc/rtc: reset BBPLL configuration after enabling it A workaround to reset BBPLL configuration after light sleep. Fixes the issue that Wi-Fi can not receive packets after waking up from light sleep. Ref. https://github.com/espressif/esp-idf/issues/2711
2018-12-06 01:43:24 -05:00
/* reset BBPLL configuration */
I2C_WRITEREG_RTC(I2C_BBPLL, I2C_BBPLL_IR_CAL_DELAY, BBPLL_IR_CAL_DELAY_VAL);
I2C_WRITEREG_RTC(I2C_BBPLL, I2C_BBPLL_IR_CAL_EXT_CAP, BBPLL_IR_CAL_EXT_CAP_VAL);
I2C_WRITEREG_RTC(I2C_BBPLL, I2C_BBPLL_OC_ENB_FCAL, BBPLL_OC_ENB_FCAL_VAL);
I2C_WRITEREG_RTC(I2C_BBPLL, I2C_BBPLL_OC_ENB_VCON, BBPLL_OC_ENB_VCON_VAL);
soc/rtc: reset another BBPLL related register Follow-up to b21ffc8a: an additional register needs to be reset. Ref. https://github.com/espressif/esp-idf/issues/2711
2018-12-11 23:22:48 -05:00
I2C_WRITEREG_RTC(I2C_BBPLL, I2C_BBPLL_BBADC_CAL_7_0, BBPLL_BBADC_CAL_7_0_VAL);
soc/rtc: add fast paths for switching between PLL and XTAL
2017-08-21 10:34:42 -04:00
}
/**
* Switch to one of PLL-based frequencies. Current frequency can be XTAL or PLL.
* PLL must already be enabled.
* @param cpu_freq new CPU frequency
*/
soc/rtc: CPU frequency settings refactoring Previous APIs used to set CPU frequency used CPU frequencies listed in rtc_cpu_freq_t enumeration. This was problematic for two reasons. First, supporting many possible frequency values obtained by dividing XTAL frequency was hard, as every value would have to be listed in the enumeration. Since different base XTAL frequencies are supported, this further complicated things, since not all of these divided frequencies would be valid for any given XTAL frequency. Second, having to deal with enumeration values often involved switch statements to convert between enumeration and MHz values, handle PLL/XTAL frequencies separately, etc. This change introduces rtc_cpu_freq_config_t structure, which contains CPU frequency (in MHz) and information on how this frequency has to be generated: clock source (XTAL/PLL), source frequency, clock divider value. More fields can be added to this structure in the future. This structure simplifies many parts of the code, since both frequency value and frequency generation settings can be accessed in any place in code without the need for conversions. Additionally, this change adds setting of REF_TICK dividers to support frequencies lower then XTAL with DFS.
2018-07-29 03:47:58 -04:00
static void rtc_clk_cpu_freq_to_pll_mhz(int cpu_freq_mhz)
{
int dbias = DIG_DBIAS_80M_160M;
soc: define named constants for DPORT_CPUPERIOD_SEL values
2019-02-26 04:07:59 -05:00
int per_conf = DPORT_CPUPERIOD_SEL_80;
soc/rtc: CPU frequency settings refactoring Previous APIs used to set CPU frequency used CPU frequencies listed in rtc_cpu_freq_t enumeration. This was problematic for two reasons. First, supporting many possible frequency values obtained by dividing XTAL frequency was hard, as every value would have to be listed in the enumeration. Since different base XTAL frequencies are supported, this further complicated things, since not all of these divided frequencies would be valid for any given XTAL frequency. Second, having to deal with enumeration values often involved switch statements to convert between enumeration and MHz values, handle PLL/XTAL frequencies separately, etc. This change introduces rtc_cpu_freq_config_t structure, which contains CPU frequency (in MHz) and information on how this frequency has to be generated: clock source (XTAL/PLL), source frequency, clock divider value. More fields can be added to this structure in the future. This structure simplifies many parts of the code, since both frequency value and frequency generation settings can be accessed in any place in code without the need for conversions. Additionally, this change adds setting of REF_TICK dividers to support frequencies lower then XTAL with DFS.
2018-07-29 03:47:58 -04:00
if (cpu_freq_mhz == 80) {
/* nothing to do */
} else if (cpu_freq_mhz == 160) {
soc: define named constants for DPORT_CPUPERIOD_SEL values
2019-02-26 04:07:59 -05:00
per_conf = DPORT_CPUPERIOD_SEL_160;
soc/rtc: CPU frequency settings refactoring Previous APIs used to set CPU frequency used CPU frequencies listed in rtc_cpu_freq_t enumeration. This was problematic for two reasons. First, supporting many possible frequency values obtained by dividing XTAL frequency was hard, as every value would have to be listed in the enumeration. Since different base XTAL frequencies are supported, this further complicated things, since not all of these divided frequencies would be valid for any given XTAL frequency. Second, having to deal with enumeration values often involved switch statements to convert between enumeration and MHz values, handle PLL/XTAL frequencies separately, etc. This change introduces rtc_cpu_freq_config_t structure, which contains CPU frequency (in MHz) and information on how this frequency has to be generated: clock source (XTAL/PLL), source frequency, clock divider value. More fields can be added to this structure in the future. This structure simplifies many parts of the code, since both frequency value and frequency generation settings can be accessed in any place in code without the need for conversions. Additionally, this change adds setting of REF_TICK dividers to support frequencies lower then XTAL with DFS.
2018-07-29 03:47:58 -04:00
} else if (cpu_freq_mhz == 240) {
dbias = DIG_DBIAS_240M;
soc: define named constants for DPORT_CPUPERIOD_SEL values
2019-02-26 04:07:59 -05:00
per_conf = DPORT_CPUPERIOD_SEL_240;
soc/rtc: CPU frequency settings refactoring Previous APIs used to set CPU frequency used CPU frequencies listed in rtc_cpu_freq_t enumeration. This was problematic for two reasons. First, supporting many possible frequency values obtained by dividing XTAL frequency was hard, as every value would have to be listed in the enumeration. Since different base XTAL frequencies are supported, this further complicated things, since not all of these divided frequencies would be valid for any given XTAL frequency. Second, having to deal with enumeration values often involved switch statements to convert between enumeration and MHz values, handle PLL/XTAL frequencies separately, etc. This change introduces rtc_cpu_freq_config_t structure, which contains CPU frequency (in MHz) and information on how this frequency has to be generated: clock source (XTAL/PLL), source frequency, clock divider value. More fields can be added to this structure in the future. This structure simplifies many parts of the code, since both frequency value and frequency generation settings can be accessed in any place in code without the need for conversions. Additionally, this change adds setting of REF_TICK dividers to support frequencies lower then XTAL with DFS.
2018-07-29 03:47:58 -04:00
} else {
soc,sdmmc: fix build failures when NDEBUG is used Use explicit error checking instead of asserts, use SOC_LOG to print error/warning messages where needed.
2018-09-24 22:58:43 -04:00
SOC_LOGE(TAG, "invalid frequency");
abort();
soc/rtc: add fast paths for switching between PLL and XTAL
2017-08-21 10:34:42 -04:00
}
soc/rtc: CPU frequency settings refactoring Previous APIs used to set CPU frequency used CPU frequencies listed in rtc_cpu_freq_t enumeration. This was problematic for two reasons. First, supporting many possible frequency values obtained by dividing XTAL frequency was hard, as every value would have to be listed in the enumeration. Since different base XTAL frequencies are supported, this further complicated things, since not all of these divided frequencies would be valid for any given XTAL frequency. Second, having to deal with enumeration values often involved switch statements to convert between enumeration and MHz values, handle PLL/XTAL frequencies separately, etc. This change introduces rtc_cpu_freq_config_t structure, which contains CPU frequency (in MHz) and information on how this frequency has to be generated: clock source (XTAL/PLL), source frequency, clock divider value. More fields can be added to this structure in the future. This structure simplifies many parts of the code, since both frequency value and frequency generation settings can be accessed in any place in code without the need for conversions. Additionally, this change adds setting of REF_TICK dividers to support frequencies lower then XTAL with DFS.
2018-07-29 03:47:58 -04:00
DPORT_REG_WRITE(DPORT_CPU_PER_CONF_REG, per_conf);
REG_SET_FIELD(RTC_CNTL_REG, RTC_CNTL_DIG_DBIAS_WAK, dbias);
soc/rtc: add fast paths for switching between PLL and XTAL
2017-08-21 10:34:42 -04:00
REG_SET_FIELD(RTC_CNTL_CLK_CONF_REG, RTC_CNTL_SOC_CLK_SEL, RTC_CNTL_SOC_CLK_SEL_PLL);
rtc_clk_apb_freq_update(80 * MHZ);
soc/rtc: CPU frequency settings refactoring Previous APIs used to set CPU frequency used CPU frequencies listed in rtc_cpu_freq_t enumeration. This was problematic for two reasons. First, supporting many possible frequency values obtained by dividing XTAL frequency was hard, as every value would have to be listed in the enumeration. Since different base XTAL frequencies are supported, this further complicated things, since not all of these divided frequencies would be valid for any given XTAL frequency. Second, having to deal with enumeration values often involved switch statements to convert between enumeration and MHz values, handle PLL/XTAL frequencies separately, etc. This change introduces rtc_cpu_freq_config_t structure, which contains CPU frequency (in MHz) and information on how this frequency has to be generated: clock source (XTAL/PLL), source frequency, clock divider value. More fields can be added to this structure in the future. This structure simplifies many parts of the code, since both frequency value and frequency generation settings can be accessed in any place in code without the need for conversions. Additionally, this change adds setting of REF_TICK dividers to support frequencies lower then XTAL with DFS.
2018-07-29 03:47:58 -04:00
ets_update_cpu_frequency(cpu_freq_mhz);
rtc_clk_wait_for_slow_cycle();
}
tools: Mass fixing of empty prototypes (for -Wstrict-prototypes)
2019-07-16 05:33:30 -04:00
void rtc_clk_cpu_freq_set_xtal(void)
soc: add source code of rtc_clk, rtc_pm
2017-04-11 03:44:43 -04:00
{
soc/rtc: CPU frequency settings refactoring Previous APIs used to set CPU frequency used CPU frequencies listed in rtc_cpu_freq_t enumeration. This was problematic for two reasons. First, supporting many possible frequency values obtained by dividing XTAL frequency was hard, as every value would have to be listed in the enumeration. Since different base XTAL frequencies are supported, this further complicated things, since not all of these divided frequencies would be valid for any given XTAL frequency. Second, having to deal with enumeration values often involved switch statements to convert between enumeration and MHz values, handle PLL/XTAL frequencies separately, etc. This change introduces rtc_cpu_freq_config_t structure, which contains CPU frequency (in MHz) and information on how this frequency has to be generated: clock source (XTAL/PLL), source frequency, clock divider value. More fields can be added to this structure in the future. This structure simplifies many parts of the code, since both frequency value and frequency generation settings can be accessed in any place in code without the need for conversions. Additionally, this change adds setting of REF_TICK dividers to support frequencies lower then XTAL with DFS.
2018-07-29 03:47:58 -04:00
int freq_mhz = (int) rtc_clk_xtal_freq_get();
soc/rtc: wait for SLOW_CLK cycle when switching CPU clock Previous implementation waited for 20us after setting RTC_CNTL_SOC_CLK_SEL_XTL register, using ets_delay_us, assuming that the CPU was running at XTAL frequency. In reality, clock switch happened on the next RTC_SLOW_CLK cycle, and CPU could be running at the previous frequency (for example, 240 MHz) until then. ets_delay_us would wait for 20 us * 40 cycles per us = 800 CPU cycles (assuming 40 MHz XTAL; even less with a 26 MHz XTAL). But if CPU was running at 240 MHz, 800 cycles would pass in just 3.3us, while SLOW_CLK cycle could happen as much as 1/150kHz = 6.7us after RTC_CNTL_SOC_CLK_SEL_XTL was set. So the software would not actually wait long enough for the clock switch to happen, and would disable the PLL while CPU was still clocked from PLL, leading to a halt. This implementation uses rtc_clk_wait_for_slow_cycle() function to wait until the clock switch, removing the need to wait for a fixed number of CPU cycles.
2017-10-26 06:46:27 -04:00
soc/rtc: CPU frequency settings refactoring Previous APIs used to set CPU frequency used CPU frequencies listed in rtc_cpu_freq_t enumeration. This was problematic for two reasons. First, supporting many possible frequency values obtained by dividing XTAL frequency was hard, as every value would have to be listed in the enumeration. Since different base XTAL frequencies are supported, this further complicated things, since not all of these divided frequencies would be valid for any given XTAL frequency. Second, having to deal with enumeration values often involved switch statements to convert between enumeration and MHz values, handle PLL/XTAL frequencies separately, etc. This change introduces rtc_cpu_freq_config_t structure, which contains CPU frequency (in MHz) and information on how this frequency has to be generated: clock source (XTAL/PLL), source frequency, clock divider value. More fields can be added to this structure in the future. This structure simplifies many parts of the code, since both frequency value and frequency generation settings can be accessed in any place in code without the need for conversions. Additionally, this change adds setting of REF_TICK dividers to support frequencies lower then XTAL with DFS.
2018-07-29 03:47:58 -04:00
rtc_clk_cpu_freq_to_xtal(freq_mhz, 1);
soc/rtc: wait for SLOW_CLK cycle when switching CPU clock Previous implementation waited for 20us after setting RTC_CNTL_SOC_CLK_SEL_XTL register, using ets_delay_us, assuming that the CPU was running at XTAL frequency. In reality, clock switch happened on the next RTC_SLOW_CLK cycle, and CPU could be running at the previous frequency (for example, 240 MHz) until then. ets_delay_us would wait for 20 us * 40 cycles per us = 800 CPU cycles (assuming 40 MHz XTAL; even less with a 26 MHz XTAL). But if CPU was running at 240 MHz, 800 cycles would pass in just 3.3us, while SLOW_CLK cycle could happen as much as 1/150kHz = 6.7us after RTC_CNTL_SOC_CLK_SEL_XTL was set. So the software would not actually wait long enough for the clock switch to happen, and would disable the PLL while CPU was still clocked from PLL, leading to a halt. This implementation uses rtc_clk_wait_for_slow_cycle() function to wait until the clock switch, removing the need to wait for a fixed number of CPU cycles.
2017-10-26 06:46:27 -04:00
rtc_clk_wait_for_slow_cycle();
soc/rtc: CPU frequency settings refactoring Previous APIs used to set CPU frequency used CPU frequencies listed in rtc_cpu_freq_t enumeration. This was problematic for two reasons. First, supporting many possible frequency values obtained by dividing XTAL frequency was hard, as every value would have to be listed in the enumeration. Since different base XTAL frequencies are supported, this further complicated things, since not all of these divided frequencies would be valid for any given XTAL frequency. Second, having to deal with enumeration values often involved switch statements to convert between enumeration and MHz values, handle PLL/XTAL frequencies separately, etc. This change introduces rtc_cpu_freq_config_t structure, which contains CPU frequency (in MHz) and information on how this frequency has to be generated: clock source (XTAL/PLL), source frequency, clock divider value. More fields can be added to this structure in the future. This structure simplifies many parts of the code, since both frequency value and frequency generation settings can be accessed in any place in code without the need for conversions. Additionally, this change adds setting of REF_TICK dividers to support frequencies lower then XTAL with DFS.
2018-07-29 03:47:58 -04:00
rtc_clk_bbpll_disable();
soc: add source code of rtc_clk, rtc_pm
2017-04-11 03:44:43 -04:00
}
soc/rtc: CPU frequency settings refactoring Previous APIs used to set CPU frequency used CPU frequencies listed in rtc_cpu_freq_t enumeration. This was problematic for two reasons. First, supporting many possible frequency values obtained by dividing XTAL frequency was hard, as every value would have to be listed in the enumeration. Since different base XTAL frequencies are supported, this further complicated things, since not all of these divided frequencies would be valid for any given XTAL frequency. Second, having to deal with enumeration values often involved switch statements to convert between enumeration and MHz values, handle PLL/XTAL frequencies separately, etc. This change introduces rtc_cpu_freq_config_t structure, which contains CPU frequency (in MHz) and information on how this frequency has to be generated: clock source (XTAL/PLL), source frequency, clock divider value. More fields can be added to this structure in the future. This structure simplifies many parts of the code, since both frequency value and frequency generation settings can be accessed in any place in code without the need for conversions. Additionally, this change adds setting of REF_TICK dividers to support frequencies lower then XTAL with DFS.
2018-07-29 03:47:58 -04:00
void rtc_clk_cpu_freq_to_config(rtc_cpu_freq_t cpu_freq, rtc_cpu_freq_config_t* out_config)
{
uint32_t source_freq_mhz;
rtc_cpu_freq_src_t source;
uint32_t freq_mhz;
uint32_t divider;
switch (cpu_freq) {
case RTC_CPU_FREQ_XTAL:
case RTC_CPU_FREQ_2M:
source_freq_mhz = rtc_clk_xtal_freq_get();
source = RTC_CPU_FREQ_SRC_XTAL;
if (cpu_freq == RTC_CPU_FREQ_2M) {
freq_mhz = 2;
rtc_clk: bugfix: incorrect divider setting in rtc_clk_cpu_freq_to_config() Merges https://github.com/espressif/esp-idf/pull/2404
2018-09-12 19:20:58 -04:00
divider = source_freq_mhz / 2;
soc/rtc: CPU frequency settings refactoring Previous APIs used to set CPU frequency used CPU frequencies listed in rtc_cpu_freq_t enumeration. This was problematic for two reasons. First, supporting many possible frequency values obtained by dividing XTAL frequency was hard, as every value would have to be listed in the enumeration. Since different base XTAL frequencies are supported, this further complicated things, since not all of these divided frequencies would be valid for any given XTAL frequency. Second, having to deal with enumeration values often involved switch statements to convert between enumeration and MHz values, handle PLL/XTAL frequencies separately, etc. This change introduces rtc_cpu_freq_config_t structure, which contains CPU frequency (in MHz) and information on how this frequency has to be generated: clock source (XTAL/PLL), source frequency, clock divider value. More fields can be added to this structure in the future. This structure simplifies many parts of the code, since both frequency value and frequency generation settings can be accessed in any place in code without the need for conversions. Additionally, this change adds setting of REF_TICK dividers to support frequencies lower then XTAL with DFS.
2018-07-29 03:47:58 -04:00
} else {
freq_mhz = source_freq_mhz;
divider = 1;
}
break;
case RTC_CPU_FREQ_80M:
source = RTC_CPU_FREQ_SRC_PLL;
source_freq_mhz = RTC_PLL_FREQ_320M;
divider = 4;
freq_mhz = 80;
break;
case RTC_CPU_FREQ_160M:
source = RTC_CPU_FREQ_SRC_PLL;
source_freq_mhz = RTC_PLL_FREQ_320M;
divider = 2;
freq_mhz = 160;
break;
case RTC_CPU_FREQ_240M:
source = RTC_CPU_FREQ_SRC_PLL;
source_freq_mhz = RTC_PLL_FREQ_480M;
divider = 2;
freq_mhz = 240;
break;
default:
soc,sdmmc: fix build failures when NDEBUG is used Use explicit error checking instead of asserts, use SOC_LOG to print error/warning messages where needed.
2018-09-24 22:58:43 -04:00
SOC_LOGE(TAG, "invalid rtc_cpu_freq_t value");
soc/rtc: CPU frequency settings refactoring Previous APIs used to set CPU frequency used CPU frequencies listed in rtc_cpu_freq_t enumeration. This was problematic for two reasons. First, supporting many possible frequency values obtained by dividing XTAL frequency was hard, as every value would have to be listed in the enumeration. Since different base XTAL frequencies are supported, this further complicated things, since not all of these divided frequencies would be valid for any given XTAL frequency. Second, having to deal with enumeration values often involved switch statements to convert between enumeration and MHz values, handle PLL/XTAL frequencies separately, etc. This change introduces rtc_cpu_freq_config_t structure, which contains CPU frequency (in MHz) and information on how this frequency has to be generated: clock source (XTAL/PLL), source frequency, clock divider value. More fields can be added to this structure in the future. This structure simplifies many parts of the code, since both frequency value and frequency generation settings can be accessed in any place in code without the need for conversions. Additionally, this change adds setting of REF_TICK dividers to support frequencies lower then XTAL with DFS.
2018-07-29 03:47:58 -04:00
abort();
}
*out_config = (rtc_cpu_freq_config_t) {
.source = source,
.source_freq_mhz = source_freq_mhz,
.div = divider,
.freq_mhz = freq_mhz
};
}
bool rtc_clk_cpu_freq_mhz_to_config(uint32_t freq_mhz, rtc_cpu_freq_config_t* out_config)
{
uint32_t source_freq_mhz;
rtc_cpu_freq_src_t source;
uint32_t divider;
uint32_t real_freq_mhz;
uint32_t xtal_freq = (uint32_t) rtc_clk_xtal_freq_get();
if (freq_mhz <= xtal_freq) {
divider = xtal_freq / freq_mhz;
real_freq_mhz = (xtal_freq + divider / 2) / divider; /* round */
if (real_freq_mhz != freq_mhz) {
soc/rtc_clk: split rtc_clk_init into separate object file rtc_clk_init and related functions don’t need to be in IRAM/DRAM.
2018-07-29 01:24:20 -04:00
// no suitable divider
soc/rtc: CPU frequency settings refactoring Previous APIs used to set CPU frequency used CPU frequencies listed in rtc_cpu_freq_t enumeration. This was problematic for two reasons. First, supporting many possible frequency values obtained by dividing XTAL frequency was hard, as every value would have to be listed in the enumeration. Since different base XTAL frequencies are supported, this further complicated things, since not all of these divided frequencies would be valid for any given XTAL frequency. Second, having to deal with enumeration values often involved switch statements to convert between enumeration and MHz values, handle PLL/XTAL frequencies separately, etc. This change introduces rtc_cpu_freq_config_t structure, which contains CPU frequency (in MHz) and information on how this frequency has to be generated: clock source (XTAL/PLL), source frequency, clock divider value. More fields can be added to this structure in the future. This structure simplifies many parts of the code, since both frequency value and frequency generation settings can be accessed in any place in code without the need for conversions. Additionally, this change adds setting of REF_TICK dividers to support frequencies lower then XTAL with DFS.
2018-07-29 03:47:58 -04:00
return false;
}
source_freq_mhz = xtal_freq;
source = RTC_CPU_FREQ_SRC_XTAL;
} else if (freq_mhz == 80) {
real_freq_mhz = freq_mhz;
source = RTC_CPU_FREQ_SRC_PLL;
source_freq_mhz = RTC_PLL_FREQ_320M;
divider = 4;
} else if (freq_mhz == 160) {
real_freq_mhz = freq_mhz;
source = RTC_CPU_FREQ_SRC_PLL;
source_freq_mhz = RTC_PLL_FREQ_320M;
divider = 2;
} else if (freq_mhz == 240) {
real_freq_mhz = freq_mhz;
source = RTC_CPU_FREQ_SRC_PLL;
source_freq_mhz = RTC_PLL_FREQ_480M;
divider = 2;
} else {
soc/rtc_clk: split rtc_clk_init into separate object file rtc_clk_init and related functions don’t need to be in IRAM/DRAM.
2018-07-29 01:24:20 -04:00
// unsupported frequency
soc/rtc: CPU frequency settings refactoring Previous APIs used to set CPU frequency used CPU frequencies listed in rtc_cpu_freq_t enumeration. This was problematic for two reasons. First, supporting many possible frequency values obtained by dividing XTAL frequency was hard, as every value would have to be listed in the enumeration. Since different base XTAL frequencies are supported, this further complicated things, since not all of these divided frequencies would be valid for any given XTAL frequency. Second, having to deal with enumeration values often involved switch statements to convert between enumeration and MHz values, handle PLL/XTAL frequencies separately, etc. This change introduces rtc_cpu_freq_config_t structure, which contains CPU frequency (in MHz) and information on how this frequency has to be generated: clock source (XTAL/PLL), source frequency, clock divider value. More fields can be added to this structure in the future. This structure simplifies many parts of the code, since both frequency value and frequency generation settings can be accessed in any place in code without the need for conversions. Additionally, this change adds setting of REF_TICK dividers to support frequencies lower then XTAL with DFS.
2018-07-29 03:47:58 -04:00
return false;
}
*out_config = (rtc_cpu_freq_config_t) {
.source = source,
.div = divider,
.source_freq_mhz = source_freq_mhz,
.freq_mhz = real_freq_mhz
};
return true;
}
void rtc_clk_cpu_freq_set_config(const rtc_cpu_freq_config_t* config)
{
rtc_xtal_freq_t xtal_freq = rtc_clk_xtal_freq_get();
uint32_t soc_clk_sel = REG_GET_FIELD(RTC_CNTL_CLK_CONF_REG, RTC_CNTL_SOC_CLK_SEL);
if (soc_clk_sel != RTC_CNTL_SOC_CLK_SEL_XTL) {
rtc_clk_cpu_freq_to_xtal(xtal_freq, 1);
rtc_clk_wait_for_slow_cycle();
}
if (soc_clk_sel == RTC_CNTL_SOC_CLK_SEL_PLL) {
rtc_clk_bbpll_disable();
}
if (config->source == RTC_CPU_FREQ_SRC_XTAL) {
if (config->div > 1) {
rtc_clk_cpu_freq_to_xtal(config->freq_mhz, config->div);
}
} else if (config->source == RTC_CPU_FREQ_SRC_PLL) {
rtc_clk_bbpll_enable();
rtc_clk_wait_for_slow_cycle();
rtc_clk_bbpll_configure(rtc_clk_xtal_freq_get(), config->source_freq_mhz);
rtc_clk_cpu_freq_to_pll_mhz(config->freq_mhz);
} else if (config->source == RTC_CPU_FREQ_SRC_8M) {
rtc_clk_cpu_freq_to_8m();
}
}
void rtc_clk_cpu_freq_get_config(rtc_cpu_freq_config_t* out_config)
{
rtc_cpu_freq_src_t source;
uint32_t source_freq_mhz;
uint32_t div;
uint32_t freq_mhz;
uint32_t soc_clk_sel = REG_GET_FIELD(RTC_CNTL_CLK_CONF_REG, RTC_CNTL_SOC_CLK_SEL);
switch (soc_clk_sel) {
case RTC_CNTL_SOC_CLK_SEL_XTL: {
source = RTC_CPU_FREQ_SRC_XTAL;
div = REG_GET_FIELD(APB_CTRL_SYSCLK_CONF_REG, APB_CTRL_PRE_DIV_CNT) + 1;
source_freq_mhz = (uint32_t) rtc_clk_xtal_freq_get();
freq_mhz = source_freq_mhz / div;
}
break;
case RTC_CNTL_SOC_CLK_SEL_PLL: {
source = RTC_CPU_FREQ_SRC_PLL;
uint32_t cpuperiod_sel = DPORT_REG_GET_FIELD(DPORT_CPU_PER_CONF_REG, DPORT_CPUPERIOD_SEL);
soc: define named constants for DPORT_CPUPERIOD_SEL values
2019-02-26 04:07:59 -05:00
if (cpuperiod_sel == DPORT_CPUPERIOD_SEL_80) {
soc/rtc: CPU frequency settings refactoring Previous APIs used to set CPU frequency used CPU frequencies listed in rtc_cpu_freq_t enumeration. This was problematic for two reasons. First, supporting many possible frequency values obtained by dividing XTAL frequency was hard, as every value would have to be listed in the enumeration. Since different base XTAL frequencies are supported, this further complicated things, since not all of these divided frequencies would be valid for any given XTAL frequency. Second, having to deal with enumeration values often involved switch statements to convert between enumeration and MHz values, handle PLL/XTAL frequencies separately, etc. This change introduces rtc_cpu_freq_config_t structure, which contains CPU frequency (in MHz) and information on how this frequency has to be generated: clock source (XTAL/PLL), source frequency, clock divider value. More fields can be added to this structure in the future. This structure simplifies many parts of the code, since both frequency value and frequency generation settings can be accessed in any place in code without the need for conversions. Additionally, this change adds setting of REF_TICK dividers to support frequencies lower then XTAL with DFS.
2018-07-29 03:47:58 -04:00
source_freq_mhz = RTC_PLL_FREQ_320M;
div = 4;
freq_mhz = 80;
soc: define named constants for DPORT_CPUPERIOD_SEL values
2019-02-26 04:07:59 -05:00
} else if (cpuperiod_sel == DPORT_CPUPERIOD_SEL_160) {
soc/rtc: CPU frequency settings refactoring Previous APIs used to set CPU frequency used CPU frequencies listed in rtc_cpu_freq_t enumeration. This was problematic for two reasons. First, supporting many possible frequency values obtained by dividing XTAL frequency was hard, as every value would have to be listed in the enumeration. Since different base XTAL frequencies are supported, this further complicated things, since not all of these divided frequencies would be valid for any given XTAL frequency. Second, having to deal with enumeration values often involved switch statements to convert between enumeration and MHz values, handle PLL/XTAL frequencies separately, etc. This change introduces rtc_cpu_freq_config_t structure, which contains CPU frequency (in MHz) and information on how this frequency has to be generated: clock source (XTAL/PLL), source frequency, clock divider value. More fields can be added to this structure in the future. This structure simplifies many parts of the code, since both frequency value and frequency generation settings can be accessed in any place in code without the need for conversions. Additionally, this change adds setting of REF_TICK dividers to support frequencies lower then XTAL with DFS.
2018-07-29 03:47:58 -04:00
source_freq_mhz = RTC_PLL_FREQ_320M;
div = 2;
freq_mhz = 160;
soc: define named constants for DPORT_CPUPERIOD_SEL values
2019-02-26 04:07:59 -05:00
} else if (cpuperiod_sel == DPORT_CPUPERIOD_SEL_240) {
soc/rtc: CPU frequency settings refactoring Previous APIs used to set CPU frequency used CPU frequencies listed in rtc_cpu_freq_t enumeration. This was problematic for two reasons. First, supporting many possible frequency values obtained by dividing XTAL frequency was hard, as every value would have to be listed in the enumeration. Since different base XTAL frequencies are supported, this further complicated things, since not all of these divided frequencies would be valid for any given XTAL frequency. Second, having to deal with enumeration values often involved switch statements to convert between enumeration and MHz values, handle PLL/XTAL frequencies separately, etc. This change introduces rtc_cpu_freq_config_t structure, which contains CPU frequency (in MHz) and information on how this frequency has to be generated: clock source (XTAL/PLL), source frequency, clock divider value. More fields can be added to this structure in the future. This structure simplifies many parts of the code, since both frequency value and frequency generation settings can be accessed in any place in code without the need for conversions. Additionally, this change adds setting of REF_TICK dividers to support frequencies lower then XTAL with DFS.
2018-07-29 03:47:58 -04:00
source_freq_mhz = RTC_PLL_FREQ_480M;
div = 2;
freq_mhz = 240;
} else {
soc,sdmmc: fix build failures when NDEBUG is used Use explicit error checking instead of asserts, use SOC_LOG to print error/warning messages where needed.
2018-09-24 22:58:43 -04:00
SOC_LOGE(TAG, "unsupported frequency configuration");
abort();
soc/rtc: CPU frequency settings refactoring Previous APIs used to set CPU frequency used CPU frequencies listed in rtc_cpu_freq_t enumeration. This was problematic for two reasons. First, supporting many possible frequency values obtained by dividing XTAL frequency was hard, as every value would have to be listed in the enumeration. Since different base XTAL frequencies are supported, this further complicated things, since not all of these divided frequencies would be valid for any given XTAL frequency. Second, having to deal with enumeration values often involved switch statements to convert between enumeration and MHz values, handle PLL/XTAL frequencies separately, etc. This change introduces rtc_cpu_freq_config_t structure, which contains CPU frequency (in MHz) and information on how this frequency has to be generated: clock source (XTAL/PLL), source frequency, clock divider value. More fields can be added to this structure in the future. This structure simplifies many parts of the code, since both frequency value and frequency generation settings can be accessed in any place in code without the need for conversions. Additionally, this change adds setting of REF_TICK dividers to support frequencies lower then XTAL with DFS.
2018-07-29 03:47:58 -04:00
}
break;
}
case RTC_CNTL_SOC_CLK_SEL_8M:
source = RTC_CPU_FREQ_SRC_8M;
source_freq_mhz = 8;
div = 1;
freq_mhz = source_freq_mhz;
break;
case RTC_CNTL_SOC_CLK_SEL_APLL:
default:
soc,sdmmc: fix build failures when NDEBUG is used Use explicit error checking instead of asserts, use SOC_LOG to print error/warning messages where needed.
2018-09-24 22:58:43 -04:00
SOC_LOGE(TAG, "unsupported frequency configuration");
abort();
soc/rtc: CPU frequency settings refactoring Previous APIs used to set CPU frequency used CPU frequencies listed in rtc_cpu_freq_t enumeration. This was problematic for two reasons. First, supporting many possible frequency values obtained by dividing XTAL frequency was hard, as every value would have to be listed in the enumeration. Since different base XTAL frequencies are supported, this further complicated things, since not all of these divided frequencies would be valid for any given XTAL frequency. Second, having to deal with enumeration values often involved switch statements to convert between enumeration and MHz values, handle PLL/XTAL frequencies separately, etc. This change introduces rtc_cpu_freq_config_t structure, which contains CPU frequency (in MHz) and information on how this frequency has to be generated: clock source (XTAL/PLL), source frequency, clock divider value. More fields can be added to this structure in the future. This structure simplifies many parts of the code, since both frequency value and frequency generation settings can be accessed in any place in code without the need for conversions. Additionally, this change adds setting of REF_TICK dividers to support frequencies lower then XTAL with DFS.
2018-07-29 03:47:58 -04:00
}
*out_config = (rtc_cpu_freq_config_t) {
.source = source,
.source_freq_mhz = source_freq_mhz,
.div = div,
.freq_mhz = freq_mhz
};
}
void rtc_clk_cpu_freq_set_config_fast(const rtc_cpu_freq_config_t* config)
{
if (config->source == RTC_CPU_FREQ_SRC_XTAL) {
rtc_clk_cpu_freq_to_xtal(config->freq_mhz, config->div);
} else if (config->source == RTC_CPU_FREQ_SRC_PLL &&
s_cur_pll_freq == config->source_freq_mhz) {
rtc_clk_cpu_freq_to_pll_mhz(config->freq_mhz);
} else {
/* fallback */
rtc_clk_cpu_freq_set_config(config);
}
}
tools: Mass fixing of empty prototypes (for -Wstrict-prototypes)
2019-07-16 05:33:30 -04:00
rtc_xtal_freq_t rtc_clk_xtal_freq_get(void)
soc: add source code of rtc_clk, rtc_pm
2017-04-11 03:44:43 -04:00
{
/* We may have already written XTAL value into RTC_XTAL_FREQ_REG */
uint32_t xtal_freq_reg = READ_PERI_REG(RTC_XTAL_FREQ_REG);
if (!clk_val_is_valid(xtal_freq_reg)) {
return RTC_XTAL_FREQ_AUTO;
}
esp32/sleep: Add a function to disable logging from ROM code
2018-09-04 04:03:18 -04:00
return reg_val_to_clk_val(xtal_freq_reg & ~RTC_DISABLE_ROM_LOG);
soc: add source code of rtc_clk, rtc_pm
2017-04-11 03:44:43 -04:00
}
void rtc_clk_xtal_freq_update(rtc_xtal_freq_t xtal_freq)
{
esp32/sleep: Add a function to disable logging from ROM code
2018-09-04 04:03:18 -04:00
uint32_t reg = READ_PERI_REG(RTC_XTAL_FREQ_REG) & RTC_DISABLE_ROM_LOG;
if (reg == RTC_DISABLE_ROM_LOG) {
xtal_freq |= 1;
}
soc: add source code of rtc_clk, rtc_pm
2017-04-11 03:44:43 -04:00
WRITE_PERI_REG(RTC_XTAL_FREQ_REG, clk_val_to_reg_val(xtal_freq));
}
void rtc_clk_apb_freq_update(uint32_t apb_freq)
{
WRITE_PERI_REG(RTC_APB_FREQ_REG, clk_val_to_reg_val(apb_freq >> 12));
}
tools: Mass fixing of empty prototypes (for -Wstrict-prototypes)
2019-07-16 05:33:30 -04:00
uint32_t rtc_clk_apb_freq_get(void)
soc: add source code of rtc_clk, rtc_pm
2017-04-11 03:44:43 -04:00
{
soc/rtc: round APB clock frequency to nearest MHz
2017-08-21 10:33:52 -04:00
uint32_t freq_hz = reg_val_to_clk_val(READ_PERI_REG(RTC_APB_FREQ_REG)) << 12;
// round to the nearest MHz
freq_hz += MHZ / 2;
uint32_t remainder = freq_hz % MHZ;
return freq_hz - remainder;
soc: add source code of rtc_clk, rtc_pm
2017-04-11 03:44:43 -04:00
}
/* Name used in libphy.a:phy_chip_v7.o
* TODO: update the library to use rtc_clk_xtal_freq_get
*/
tools: Mass fixing of empty prototypes (for -Wstrict-prototypes)
2019-07-16 05:33:30 -04:00
rtc_xtal_freq_t rtc_get_xtal(void) __attribute__((alias("rtc_clk_xtal_freq_get")));
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