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Merge branch 'feature/support_7.2.8_soc/pvt-dig' into 'master'
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rtc: auto adjust LDO voltage based on pvt-dig saved in efuse

Closes IDF-4873

See merge request espressif/esp-idf!16365
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@ginkgm
ginkgm committed Aug 22, 2022
2 parents 4b9d55f + 80c821a commit e7dbfd6
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Showing 7 changed files with 267 additions and 35 deletions.
47 changes: 46 additions & 1 deletion components/efuse/esp32s3/esp_efuse_table.c
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Original file line number Diff line number Diff line change
Expand Up @@ -9,7 +9,7 @@
#include <assert.h>
#include "esp_efuse_table.h"

// md5_digest_table 8c7a031bb0def28f2123ac5ee2a48d43
// md5_digest_table 87c5ae68b74dbafb114e14f6febff9e2
// This file was generated from the file esp_efuse_table.csv. DO NOT CHANGE THIS FILE MANUALLY.
// If you want to change some fields, you need to change esp_efuse_table.csv file
// then run `efuse_common_table` or `efuse_custom_table` command it will generate this file.
Expand Down Expand Up @@ -549,6 +549,26 @@ static const esp_efuse_desc_t SYS_DATA_PART2[] = {
{EFUSE_BLK10, 0, 256}, // System configuration,
};

static const esp_efuse_desc_t K_RTC_LDO[] = {
{EFUSE_BLK1, 141, 7}, // BLOCK1 K_RTC_LDO,
};

static const esp_efuse_desc_t K_DIG_LDO[] = {
{EFUSE_BLK1, 148, 7}, // BLOCK1 K_DIG_LDO,
};

static const esp_efuse_desc_t V_RTC_DBIAS20[] = {
{EFUSE_BLK1, 155, 8}, // BLOCK1 voltage of rtc dbias20,
};

static const esp_efuse_desc_t V_DIG_DBIAS20[] = {
{EFUSE_BLK1, 163, 8}, // BLOCK1 voltage of digital dbias20,
};

static const esp_efuse_desc_t DIG_DBIAS_HVT[] = {
{EFUSE_BLK1, 171, 5}, // BLOCK1 digital dbias when hvt,
};




Expand Down Expand Up @@ -1218,3 +1238,28 @@ const esp_efuse_desc_t* ESP_EFUSE_SYS_DATA_PART2[] = {
&SYS_DATA_PART2[0], // System configuration
NULL
};

const esp_efuse_desc_t* ESP_EFUSE_K_RTC_LDO[] = {
&K_RTC_LDO[0], // BLOCK1 K_RTC_LDO
NULL
};

const esp_efuse_desc_t* ESP_EFUSE_K_DIG_LDO[] = {
&K_DIG_LDO[0], // BLOCK1 K_DIG_LDO
NULL
};

const esp_efuse_desc_t* ESP_EFUSE_V_RTC_DBIAS20[] = {
&V_RTC_DBIAS20[0], // BLOCK1 voltage of rtc dbias20
NULL
};

const esp_efuse_desc_t* ESP_EFUSE_V_DIG_DBIAS20[] = {
&V_DIG_DBIAS20[0], // BLOCK1 voltage of digital dbias20
NULL
};

const esp_efuse_desc_t* ESP_EFUSE_DIG_DBIAS_HVT[] = {
&DIG_DBIAS_HVT[0], // BLOCK1 digital dbias when hvt
NULL
};
8 changes: 8 additions & 0 deletions components/efuse/esp32s3/esp_efuse_table.csv
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Original file line number Diff line number Diff line change
Expand Up @@ -183,3 +183,11 @@ KEY3, EFUSE_BLK7, 0, 256, Key3 or us
KEY4, EFUSE_BLK8, 0, 256, Key4 or user data
KEY5, EFUSE_BLK9, 0, 256, Key5 or user data
SYS_DATA_PART2, EFUSE_BLK10, 0, 256, System configuration

# AUTO CONFIG DIG&RTC DBIAS#
################
K_RTC_LDO, EFUSE_BLK1, 141, 7, BLOCK1 K_RTC_LDO
K_DIG_LDO, EFUSE_BLK1, 148, 7, BLOCK1 K_DIG_LDO
V_RTC_DBIAS20, EFUSE_BLK1, 155, 8, BLOCK1 voltage of rtc dbias20
V_DIG_DBIAS20, EFUSE_BLK1, 163, 8, BLOCK1 voltage of digital dbias20
DIG_DBIAS_HVT, EFUSE_BLK1, 171, 5, BLOCK1 digital dbias when hvt
7 changes: 6 additions & 1 deletion components/efuse/esp32s3/include/esp_efuse_table.h
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Original file line number Diff line number Diff line change
Expand Up @@ -10,7 +10,7 @@ extern "C" {

#include "esp_efuse.h"

// md5_digest_table 8c7a031bb0def28f2123ac5ee2a48d43
// md5_digest_table 87c5ae68b74dbafb114e14f6febff9e2
// This file was generated from the file esp_efuse_table.csv. DO NOT CHANGE THIS FILE MANUALLY.
// If you want to change some fields, you need to change esp_efuse_table.csv file
// then run `efuse_common_table` or `efuse_custom_table` command it will generate this file.
Expand Down Expand Up @@ -149,6 +149,11 @@ extern const esp_efuse_desc_t* ESP_EFUSE_KEY3[];
extern const esp_efuse_desc_t* ESP_EFUSE_KEY4[];
extern const esp_efuse_desc_t* ESP_EFUSE_KEY5[];
extern const esp_efuse_desc_t* ESP_EFUSE_SYS_DATA_PART2[];
extern const esp_efuse_desc_t* ESP_EFUSE_K_RTC_LDO[];
extern const esp_efuse_desc_t* ESP_EFUSE_K_DIG_LDO[];
extern const esp_efuse_desc_t* ESP_EFUSE_V_RTC_DBIAS20[];
extern const esp_efuse_desc_t* ESP_EFUSE_V_DIG_DBIAS20[];
extern const esp_efuse_desc_t* ESP_EFUSE_DIG_DBIAS_HVT[];

#ifdef __cplusplus
}
Expand Down
86 changes: 55 additions & 31 deletions components/esp_hw_support/port/esp32s3/rtc_clk.c
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Original file line number Diff line number Diff line change
Expand Up @@ -30,10 +30,15 @@ static uint32_t s_cur_pll_freq;

static uint32_t s_apb_freq;

static void rtc_clk_cpu_freq_to_xtal(int freq, int div);
void rtc_clk_cpu_freq_to_xtal(int freq, int div);
static void rtc_clk_cpu_freq_to_8m(void);
static bool rtc_clk_set_bbpll_always_on(void);

extern uint32_t g_dig_dbias_pvt_240m;
extern uint32_t g_rtc_dbias_pvt_240m;
extern uint32_t g_dig_dbias_pvt_non_240m;
extern uint32_t g_rtc_dbias_pvt_non_240m;

void rtc_clk_32k_enable(bool enable)
{
if (enable) {
Expand Down Expand Up @@ -94,18 +99,6 @@ bool rtc_clk_8md256_enabled(void)
return clk_ll_rc_fast_d256_is_enabled();
}

static void wait_dig_dbias_valid(uint64_t rtc_cycles)
{
soc_rtc_slow_clk_src_t slow_clk_freq = rtc_clk_slow_src_get();
rtc_cal_sel_t cal_clk = RTC_CAL_RTC_MUX;
if (slow_clk_freq == SOC_RTC_SLOW_CLK_SRC_XTAL32K) {
cal_clk = RTC_CAL_32K_XTAL;
} else if (slow_clk_freq == SOC_RTC_SLOW_CLK_SRC_RC_FAST_D256) {
cal_clk = RTC_CAL_8MD256;
}
rtc_clk_cal(cal_clk, rtc_cycles);
}

void rtc_clk_slow_src_set(soc_rtc_slow_clk_src_t clk_src)
{
clk_ll_rtc_slow_set_src(clk_src);
Expand Down Expand Up @@ -182,17 +175,45 @@ static void rtc_clk_bbpll_configure(rtc_xtal_freq_t xtal_freq, int pll_freq)
*/
static void rtc_clk_cpu_freq_to_pll_mhz(int cpu_freq_mhz)
{
int dbias = (cpu_freq_mhz == 240) ? DIG_DBIAS_240M : DIG_DBIAS_80M_160M;
REGI2C_WRITE_MASK(I2C_DIG_REG, I2C_DIG_REG_EXT_DIG_DREG, dbias);
REGI2C_WRITE_MASK(I2C_DIG_REG, I2C_DIG_REG_EXT_RTC_DREG, dbias);
wait_dig_dbias_valid(2);

clk_ll_cpu_set_freq_mhz_from_pll(cpu_freq_mhz);
clk_ll_cpu_set_divider(1);
/* switch clock source */
clk_ll_cpu_set_src(SOC_CPU_CLK_SRC_PLL);
rtc_clk_apb_freq_update(80 * MHZ);
ets_update_cpu_frequency(cpu_freq_mhz);
/* cpu_frequency < 240M: dbias = pvt-dig + 2;
cpu_frequency = 240M: dbias = pvt-dig + 3;
*/
if (cpu_freq_mhz != 240) {
REGI2C_WRITE_MASK(I2C_DIG_REG, I2C_DIG_REG_EXT_RTC_DREG, g_rtc_dbias_pvt_non_240m);
REGI2C_WRITE_MASK(I2C_DIG_REG, I2C_DIG_REG_EXT_DIG_DREG, g_dig_dbias_pvt_non_240m);
} else {
REGI2C_WRITE_MASK(I2C_DIG_REG, I2C_DIG_REG_EXT_RTC_DREG, g_rtc_dbias_pvt_240m);
REGI2C_WRITE_MASK(I2C_DIG_REG, I2C_DIG_REG_EXT_DIG_DREG, g_dig_dbias_pvt_240m);
}
esp_rom_delay_us(40);

/* There are totally 6 LDO slaves(all on by default). At the moment of swithing LDO slave, LDO voltage will also change instantaneously.
* LDO slave can reduce the voltage change caused by switching frequency.
* CPU frequency <= 40M : just open 3 LDO slaves; CPU frequency = 80M : open 4 LDO slaves; CPU frequency = 160M : open 5 LDO slaves; CPU frequency = 240M : open 6 LDO slaves;
*
* LDO voltage will decrease at the moment of switching from low frequency to high frequency; otherwise, LDO voltage will increase.
* In order to reduce LDO voltage drop, LDO voltage should rise first then fall.
*/
int pd_slave = cpu_freq_mhz / 80;
rtc_cpu_freq_config_t cur_config;
rtc_clk_cpu_freq_get_config(&cur_config);
if (cpu_freq_mhz > cur_config.freq_mhz) {
REG_SET_FIELD(RTC_CNTL_DATE_REG, RTC_CNTL_SLAVE_PD, DEFAULT_LDO_SLAVE >> pd_slave);
clk_ll_cpu_set_freq_mhz_from_pll(cpu_freq_mhz);
clk_ll_cpu_set_divider(1);
/* switch clock source */
clk_ll_cpu_set_src(SOC_CPU_CLK_SRC_PLL);
rtc_clk_apb_freq_update(80 * MHZ);
ets_update_cpu_frequency(cpu_freq_mhz);
} else {
clk_ll_cpu_set_freq_mhz_from_pll(cpu_freq_mhz);
clk_ll_cpu_set_divider(1);
/* switch clock source */
clk_ll_cpu_set_src(SOC_CPU_CLK_SRC_PLL);
rtc_clk_apb_freq_update(80 * MHZ);
ets_update_cpu_frequency(cpu_freq_mhz);
REG_SET_FIELD(RTC_CNTL_DATE_REG, RTC_CNTL_SLAVE_PD, DEFAULT_LDO_SLAVE >> pd_slave);
}
}

bool rtc_clk_cpu_freq_mhz_to_config(uint32_t freq_mhz, rtc_cpu_freq_config_t *out_config)
Expand Down Expand Up @@ -336,30 +357,33 @@ void rtc_clk_cpu_freq_set_xtal(void)

/**
* Switch to XTAL frequency. Does not disable the PLL.
* Public function for testing only.
*/
static void rtc_clk_cpu_freq_to_xtal(int freq, int div)
void rtc_clk_cpu_freq_to_xtal(int freq, int div)
{
REGI2C_WRITE_MASK(I2C_DIG_REG, I2C_DIG_REG_EXT_RTC_DREG, g_rtc_dbias_pvt_non_240m);
REGI2C_WRITE_MASK(I2C_DIG_REG, I2C_DIG_REG_EXT_DIG_DREG, g_dig_dbias_pvt_non_240m);
esp_rom_delay_us(40);
ets_update_cpu_frequency(freq);
/* set digital voltage for different cpu freq from xtal */
int dbias = (freq <= 2) ? DIG_DBIAS_2M : DIG_DBIAS_XTAL;
REGI2C_WRITE_MASK(I2C_DIG_REG, I2C_DIG_REG_EXT_DIG_DREG, dbias);
wait_dig_dbias_valid(2);
/* Set divider from XTAL to APB clock. Need to set divider to 1 (reg. value 0) first. */
clk_ll_cpu_set_divider(1);
clk_ll_cpu_set_divider(div);
/* switch clock source */
clk_ll_cpu_set_src(SOC_CPU_CLK_SRC_XTAL);
rtc_clk_apb_freq_update(freq * MHZ);
REG_SET_FIELD(RTC_CNTL_DATE_REG, RTC_CNTL_SLAVE_PD, DEFAULT_LDO_SLAVE);
}

static void rtc_clk_cpu_freq_to_8m(void)
{
ets_update_cpu_frequency(20);
REGI2C_WRITE_MASK(I2C_DIG_REG, I2C_DIG_REG_EXT_DIG_DREG, DIG_DBIAS_XTAL);
wait_dig_dbias_valid(2);
REGI2C_WRITE_MASK(I2C_DIG_REG, I2C_DIG_REG_EXT_RTC_DREG, g_rtc_dbias_pvt_non_240m);
REGI2C_WRITE_MASK(I2C_DIG_REG, I2C_DIG_REG_EXT_DIG_DREG, g_dig_dbias_pvt_non_240m);
esp_rom_delay_us(40);
clk_ll_cpu_set_divider(1);
clk_ll_cpu_set_src(SOC_CPU_CLK_SRC_RC_FAST);
rtc_clk_apb_freq_update(SOC_CLK_RC_FAST_FREQ_APPROX);
REG_SET_FIELD(RTC_CNTL_DATE_REG, RTC_CNTL_SLAVE_PD, DEFAULT_LDO_SLAVE);
}

rtc_xtal_freq_t rtc_clk_xtal_freq_get(void)
Expand Down
128 changes: 127 additions & 1 deletion components/esp_hw_support/port/esp32s3/rtc_init.c
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Original file line number Diff line number Diff line change
Expand Up @@ -24,14 +24,21 @@
#include "esp_efuse.h"
#include "esp_efuse_table.h"
#include "esp_private/spi_flash_os.h"

#include "hal/efuse_hal.h"

#define RTC_CNTL_MEM_FORCE_NOISO (RTC_CNTL_SLOWMEM_FORCE_NOISO | RTC_CNTL_FASTMEM_FORCE_NOISO)

static const char *TAG = "rtcinit";

static void set_ocode_by_efuse(int calib_version);
static void calibrate_ocode(void);
static void rtc_set_stored_dbias(void);

// Initial values are used for bootloader, and these variables will be re-assigned based on efuse values during application startup
uint32_t g_dig_dbias_pvt_240m = 28;
uint32_t g_rtc_dbias_pvt_240m = 28;
uint32_t g_dig_dbias_pvt_non_240m = 27;
uint32_t g_rtc_dbias_pvt_non_240m = 27;

void rtc_init(rtc_config_t cfg)
{
Expand Down Expand Up @@ -89,6 +96,12 @@ void rtc_init(rtc_config_t cfg)
}
}

//LDO dbias initialization
rtc_set_stored_dbias();

REGI2C_WRITE_MASK(I2C_DIG_REG, I2C_DIG_REG_EXT_RTC_DREG, g_rtc_dbias_pvt_non_240m);
REGI2C_WRITE_MASK(I2C_DIG_REG, I2C_DIG_REG_EXT_DIG_DREG, g_dig_dbias_pvt_non_240m);

if (cfg.clkctl_init) {
//clear CMMU clock force on
CLEAR_PERI_REG_MASK(EXTMEM_CACHE_MMU_POWER_CTRL_REG, EXTMEM_CACHE_MMU_MEM_FORCE_ON);
Expand Down Expand Up @@ -301,3 +314,116 @@ static void calibrate_ocode(void)
spi_timing_change_speed_mode_cache_safe(false);
#endif
}

static uint32_t get_dig_dbias_by_efuse(uint8_t pvt_scheme_ver)
{
assert(pvt_scheme_ver == 1);
uint32_t dig_dbias = 28;
esp_err_t err = esp_efuse_read_field_blob(ESP_EFUSE_DIG_DBIAS_HVT, &dig_dbias, ESP_EFUSE_DIG_DBIAS_HVT[0]->bit_count);
if (err != ESP_OK) {
dig_dbias = 28;
ESP_HW_LOGW(TAG, "efuse read fail, set default dig_dbias value: %d\n", dig_dbias);
}
return dig_dbias;
}

static uint32_t get_rtc_dbias_by_efuse(uint8_t pvt_scheme_ver, uint32_t dig_dbias)
{
assert(pvt_scheme_ver == 1);
uint32_t rtc_dbias = 0;
signed int k_rtc_ldo = 0, k_dig_ldo = 0, v_rtc_bias20 = 0, v_dig_bias20 = 0;
esp_err_t err0 = esp_efuse_read_field_blob(ESP_EFUSE_K_RTC_LDO, &k_rtc_ldo, ESP_EFUSE_K_RTC_LDO[0]->bit_count);
esp_err_t err1 = esp_efuse_read_field_blob(ESP_EFUSE_K_DIG_LDO, &k_dig_ldo, ESP_EFUSE_K_DIG_LDO[0]->bit_count);
esp_err_t err2 = esp_efuse_read_field_blob(ESP_EFUSE_V_RTC_DBIAS20, &v_rtc_bias20, ESP_EFUSE_V_RTC_DBIAS20[0]->bit_count);
esp_err_t err3 = esp_efuse_read_field_blob(ESP_EFUSE_V_DIG_DBIAS20, &v_dig_bias20, ESP_EFUSE_V_DIG_DBIAS20[0]->bit_count);
if ((err0 != ESP_OK) | (err1 != ESP_OK) | (err2 != ESP_OK) | (err3 != ESP_OK)) {
k_rtc_ldo = 0;
k_dig_ldo = 0;
v_rtc_bias20 = 0;
v_dig_bias20 = 0;
ESP_HW_LOGW(TAG, "efuse read fail, k_rtc_ldo: %d, k_dig_ldo: %d, v_rtc_bias20: %d, v_dig_bias20: %d\n", k_rtc_ldo, k_dig_ldo, v_rtc_bias20, v_dig_bias20);
}

k_rtc_ldo = ((k_rtc_ldo & BIT(6)) != 0)? -(k_rtc_ldo & 0x3f): (uint8_t)k_rtc_ldo;
k_dig_ldo = ((k_dig_ldo & BIT(6)) != 0)? -(k_dig_ldo & 0x3f): (uint8_t)k_dig_ldo;
v_rtc_bias20 = ((v_rtc_bias20 & BIT(7)) != 0)? -(v_rtc_bias20 & 0x7f): (uint8_t)v_rtc_bias20;
v_dig_bias20 = ((v_dig_bias20 & BIT(7)) != 0)? -(v_dig_bias20 & 0x7f): (uint8_t)v_dig_bias20;

uint32_t v_rtc_dbias20_real_mul10000 = V_RTC_MID_MUL10000 + v_rtc_bias20 * 10000 / 500;
uint32_t v_dig_dbias20_real_mul10000 = V_DIG_MID_MUL10000 + v_dig_bias20 * 10000 / 500;
signed int k_rtc_ldo_real_mul10000 = K_RTC_MID_MUL10000 + k_rtc_ldo;
signed int k_dig_ldo_real_mul10000 = K_DIG_MID_MUL10000 + k_dig_ldo;
uint32_t v_dig_nearest_1v15_mul10000 = v_dig_dbias20_real_mul10000 + k_dig_ldo_real_mul10000 * (dig_dbias - 20);
for (rtc_dbias = 15; rtc_dbias < 31; rtc_dbias++) {
uint32_t v_rtc_nearest_1v15_mul10000 = 0;
v_rtc_nearest_1v15_mul10000 = v_rtc_dbias20_real_mul10000 + k_rtc_ldo_real_mul10000 * (rtc_dbias - 20);
if (v_rtc_nearest_1v15_mul10000 >= v_dig_nearest_1v15_mul10000 - 250) {
break;
}
}
return rtc_dbias;
}

static uint32_t get_dig1v3_dbias_by_efuse(uint8_t pvt_scheme_ver)
{
assert(pvt_scheme_ver == 1);
signed int k_dig_ldo = 0, v_dig_bias20 = 0;
esp_err_t err0 = esp_efuse_read_field_blob(ESP_EFUSE_K_DIG_LDO, &k_dig_ldo, ESP_EFUSE_K_DIG_LDO[0]->bit_count);
esp_err_t err1 = esp_efuse_read_field_blob(ESP_EFUSE_V_DIG_DBIAS20, &v_dig_bias20, ESP_EFUSE_V_DIG_DBIAS20[0]->bit_count);
if ((err0 != ESP_OK) | (err1 != ESP_OK)) {
k_dig_ldo = 0;
v_dig_bias20 = 0;
ESP_HW_LOGW(TAG, "efuse read fail, k_dig_ldo: %d, v_dig_bias20: %d\n", k_dig_ldo, v_dig_bias20);
}

k_dig_ldo = ((k_dig_ldo & BIT(6)) != 0)? -(k_dig_ldo & 0x3f): (uint8_t)k_dig_ldo;
v_dig_bias20 = ((v_dig_bias20 & BIT(7)) != 0)? -(v_dig_bias20 & 0x7f): (uint8_t)v_dig_bias20;

uint32_t v_dig_dbias20_real_mul10000 = V_DIG_MID_MUL10000 + v_dig_bias20 * 10000 / 500;
signed int k_dig_ldo_real_mul10000 = K_DIG_MID_MUL10000 + k_dig_ldo;
uint32_t dig_dbias =15;
for (dig_dbias = 15; dig_dbias < 31; dig_dbias++) {
uint32_t v_dig_nearest_1v3_mul10000 = 0;
v_dig_nearest_1v3_mul10000 = v_dig_dbias20_real_mul10000 + k_dig_ldo_real_mul10000 * (dig_dbias - 20);
if (v_dig_nearest_1v3_mul10000 >= 13000) {
break;
}
}
return dig_dbias;
}

static void rtc_set_stored_dbias(void)
{
/*
1. a reasonable dig_dbias which by scaning pvt to make 240 CPU run successful stored in efuse;
2. also we store some value in efuse, include:
k_rtc_ldo (slope of rtc voltage & rtc_dbias);
k_dig_ldo (slope of digital voltage & digital_dbias);
v_rtc_bias20 (rtc voltage when rtc dbais is 20);
v_dig_bias20 (digital voltage when digital dbais is 20).
3. a reasonable rtc_dbias can be calculated by a certion formula.
4. save these values for reuse
*/
uint8_t blk_minor = efuse_ll_get_blk_version_minor();
uint8_t blk_major = efuse_ll_get_blk_version_major();
uint8_t pvt_scheme_ver = 0;
if ( (blk_major <= 1 && blk_minor == 1) || blk_major > 1 || (blk_major == 1 && blk_minor >= 2) ) {
/* PVT supported after blk_ver 1.2 */
pvt_scheme_ver = 1;
}

if (pvt_scheme_ver == 1) {
uint32_t dig1v3_dbias = get_dig1v3_dbias_by_efuse(pvt_scheme_ver);
uint32_t dig_dbias = get_dig_dbias_by_efuse(pvt_scheme_ver);
if (dig_dbias != 0) {
g_dig_dbias_pvt_240m = MIN(dig1v3_dbias, dig_dbias + 3);
g_dig_dbias_pvt_non_240m = MIN(dig1v3_dbias, dig_dbias + 2);
g_rtc_dbias_pvt_240m = get_rtc_dbias_by_efuse(pvt_scheme_ver, g_dig_dbias_pvt_240m);
g_rtc_dbias_pvt_non_240m = get_rtc_dbias_by_efuse(pvt_scheme_ver, g_dig_dbias_pvt_non_240m);
} else {
ESP_HW_LOGD(TAG, "not burn core voltage in efuse or burn wrong voltage value in blk version: 0%d\n", pvt_scheme_ver);
}
} else {
ESP_HW_LOGD(TAG, "core voltage not decided in efuse, use default value.");
}
}
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