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esp-idf/components/esp_hw_support/mspi_timing_tuning.c

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/*
* SPDX-FileCopyrightText: 2019-2023 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <stdlib.h>
#include <string.h>
#include "sdkconfig.h"
#include "esp_attr.h"
#include "esp_err.h"
#include "esp_types.h"
#include "esp_log.h"
#include "soc/io_mux_reg.h"
#include "soc/soc.h"
#include "hal/spi_flash_hal.h"
#include "hal/cache_hal.h"
#include "esp_private/mspi_timing_tuning.h"
#include "mspi_timing_config.h"
#include "mspi_timing_by_mspi_delay.h"
#if SOC_MEMSPI_TIMING_TUNING_BY_MSPI_DELAY
#include "mspi_timing_tuning_configs.h"
#include "hal/mspi_timing_tuning_ll.h"
#endif
#if SOC_MEMSPI_CLK_SRC_IS_INDEPENDENT
#include "hal/spimem_flash_ll.h"
#endif
#if CONFIG_ESPTOOLPY_FLASHFREQ_120M
#define FLASH_FREQUENCY_MHZ 120
#elif CONFIG_ESPTOOLPY_FLASHFREQ_80M
#define FLASH_FREQUENCY_MHZ 80
#elif CONFIG_ESPTOOLPY_FLASHFREQ_64M
#define FLASH_FREQUENCY_MHZ 64
#elif CONFIG_ESPTOOLPY_FLASHFREQ_60M
#define FLASH_FREQUENCY_MHZ 60
#elif CONFIG_ESPTOOLPY_FLASHFREQ_48M
#define FLASH_FREQUENCY_MHZ 48
#elif CONFIG_ESPTOOLPY_FLASHFREQ_40M
#define FLASH_FREQUENCY_MHZ 40
#elif CONFIG_ESPTOOLPY_FLASHFREQ_32M
#define FLASH_FREQUENCY_MHZ 32
#elif CONFIG_ESPTOOLPY_FLASHFREQ_30M
#define FLASH_FREQUENCY_MHZ 30
#elif CONFIG_ESPTOOLPY_FLASHFREQ_26M
#define FLASH_FREQUENCY_MHZ 26
#elif CONFIG_ESPTOOLPY_FLASHFREQ_24M
#define FLASH_FREQUENCY_MHZ 24
#elif CONFIG_ESPTOOLPY_FLASHFREQ_20M
#define FLASH_FREQUENCY_MHZ 20
#elif CONFIG_ESPTOOLPY_FLASHFREQ_16M
#define FLASH_FREQUENCY_MHZ 16
#elif CONFIG_ESPTOOLPY_FLASHFREQ_15M
#define FLASH_FREQUENCY_MHZ 15
#endif
/**
* @brief MSPI timing tuning type
*/
typedef enum {
MSPI_TIMING_TUNING_MSPI_DIN_DUMMY, //tune by mspi din and dummy
} mspi_timing_tuning_t;
typedef struct mspi_tuning_cfg_drv_s mspi_tuning_cfg_drv_t;
__attribute__((unused)) const static char *TAG = "MSPI Timing";
struct mspi_tuning_cfg_drv_s {
/**
* @brief Flash tuning scheme type
*/
mspi_timing_tuning_t flash_tuning_type;
/**
* @brief Init MSPI for Flash timing tuning
*
* @param[in] flash_freq_mhz Flash frequency in MHz
*/
void (*flash_init_mspi)(uint32_t flash_freq_mhz);
/**
* @brief Configure MSPI for Flash timing tuning
*
* @param[in] params Timing tuning parameters
*/
void (*flash_tune_mspi)(const void *params);
/**
* @brief Flash read
*
* @param[in] buf Read buffer
* @param[in] addr Read address
* @param[in] len Read length
*/
void (*flash_read)(uint8_t *buf, uint32_t addr, uint32_t len);
/**
* @brief Select best tuning configs for Flash
*
* @param[in] configs Timing tuning configurations
* @param[in] consecutive_length Length of the consecutive successful sample results
* @param[in] end End of the consecutive successful sample results
* @param[in] reference_data Reference data
* @param[in] is_ddr DDR or SDR
*
* @return Best config ID
*/
uint32_t (*flash_select_best_tuning_config)(const void *configs, uint32_t consecutive_length, uint32_t end, const uint8_t *reference_data, bool is_ddr);
/**
* @brief Set best Flash tuning configs.
* After this, calling `mspi_timing_enter_high_speed_mode` will set these configs correctly
*
* @param[in] params Timing tuning parameters
*/
void (*flash_set_best_tuning_config)(const void *params);
/**
* @brief PSRAM tuning scheme type
*/
mspi_timing_tuning_t psram_tuning_type;
/**
* @brief Init MSPI for PSRAM timing tuning
*
* @param[in] flash_freq_mhz PSRAM frequency in MHz
*/
void (*psram_init_mspi)(uint32_t psram_freq_mhz);
/**
* @brief Configure MSPI for PSRAM timing tuning
*
* @param[in] params Timing tuning parameters
*/
void (*psram_tune_mspi)(const void *params);
/**
* @brief PSRAM read
*
* @param[in] buf Read buffer
* @param[in] addr Read address
* @param[in] len Read length
*/
void (*psram_read)(uint8_t *buf, uint32_t addr, uint32_t len);
/**
* @brief Select best tuning configs for PSRAM
*
* @param[in] configs Timing tuning configurations
* @param[in] consecutive_length Length of the consecutive successful sample results
* @param[in] end End of the consecutive successful sample results
* @param[in] reference_data Reference data
* @param[in] is_ddr DDR or SDR
*
* @return Best config ID
*/
uint32_t (*psram_select_best_tuning_config)(const void *configs, uint32_t consecutive_length, uint32_t end, const uint8_t *reference_data, bool is_ddr);
/**
* @brief Set best PSRAM tuning configs.
* After this, calling `mspi_timing_enter_high_speed_mode` will set these configs correctly
*
* @param[in] params Timing tuning parameters
*/
void (*psram_set_best_tuning_config)(const void *params);
};
static mspi_tuning_cfg_drv_t s_tuning_cfg_drv = {};
void s_register_config_driver(mspi_tuning_cfg_drv_t *cfg_drv, bool is_flash)
{
if (is_flash) {
s_tuning_cfg_drv.flash_tuning_type = cfg_drv->flash_tuning_type;
s_tuning_cfg_drv.flash_init_mspi = cfg_drv->flash_init_mspi;
s_tuning_cfg_drv.flash_tune_mspi = cfg_drv->flash_tune_mspi;
s_tuning_cfg_drv.flash_read = cfg_drv->flash_read;
s_tuning_cfg_drv.flash_select_best_tuning_config = cfg_drv->flash_select_best_tuning_config;
s_tuning_cfg_drv.flash_set_best_tuning_config = cfg_drv->flash_set_best_tuning_config;
} else {
s_tuning_cfg_drv.psram_tuning_type = cfg_drv->psram_tuning_type;
s_tuning_cfg_drv.psram_init_mspi = cfg_drv->psram_init_mspi;
s_tuning_cfg_drv.psram_tune_mspi = cfg_drv->psram_tune_mspi;
s_tuning_cfg_drv.psram_read = cfg_drv->psram_read;
s_tuning_cfg_drv.psram_select_best_tuning_config = cfg_drv->psram_select_best_tuning_config;
s_tuning_cfg_drv.psram_set_best_tuning_config = cfg_drv->psram_set_best_tuning_config;
}
}
#if MSPI_TIMING_FLASH_NEEDS_TUNING || MSPI_TIMING_PSRAM_NEEDS_TUNING
/**
* We use different MSPI timing tuning config to read data to see if current MSPI sampling is successful.
* The sampling result will be stored in an array. In this array, successful item will be 1, failed item will be 0.
*/
static void s_sweep_for_success_sample_points(uint8_t *reference_data, void *config, bool is_flash, uint8_t *out_array)
{
const mspi_timing_config_t *timing_config = (const mspi_timing_config_t *)config;
uint32_t config_idx = 0;
uint8_t read_data[MSPI_TIMING_TEST_DATA_LEN] = {0};
for (config_idx = 0; config_idx < timing_config->available_config_num; config_idx++) {
memset(read_data, 0, MSPI_TIMING_TEST_DATA_LEN);
#if MSPI_TIMING_FLASH_NEEDS_TUNING
if (is_flash) {
s_tuning_cfg_drv.flash_tune_mspi(&(timing_config->tuning_config_table[config_idx]));
s_tuning_cfg_drv.flash_read(read_data, MSPI_TIMING_FLASH_TEST_DATA_ADDR, sizeof(read_data));
}
#endif
#if MSPI_TIMING_PSRAM_NEEDS_TUNING
if (!is_flash) {
s_tuning_cfg_drv.psram_tune_mspi(&(timing_config->tuning_config_table[config_idx]));
s_tuning_cfg_drv.psram_read(read_data, MSPI_TIMING_PSRAM_TEST_DATA_ADDR, MSPI_TIMING_TEST_DATA_LEN);
}
#endif
if (memcmp(reference_data, read_data, sizeof(read_data)) == 0) {
out_array[config_idx] = 1;
ESP_EARLY_LOGD(TAG, "%d, good", config_idx);
} else {
ESP_EARLY_LOGD(TAG, "%d, bad", config_idx);
}
}
}
/**
* Find consecutive successful sampling points.
* e.g. array: {1, 1, 0, 0, 1, 1, 1, 0}
* out_length: 3
* outout_end_index: 6
*/
static void s_find_max_consecutive_success_points(uint8_t *array, uint32_t size, uint32_t *out_length, uint32_t *out_end_index)
{
uint32_t max = 0;
uint32_t match_num = 0;
uint32_t i = 0;
uint32_t end = 0;
while (i < size) {
if (array[i]) {
match_num++;
} else {
if (match_num > max) {
max = match_num;
end = i - 1;
}
match_num = 0;
}
i++;
}
*out_length = match_num > max ? match_num : max;
*out_end_index = match_num == size ? size : end;
}
static void s_select_best_tuning_config(mspi_timing_config_t *config, uint32_t consecutive_length, uint32_t end, const uint8_t *reference_data, bool is_flash)
{
const mspi_timing_config_t *timing_config = (const mspi_timing_config_t *)config;
uint32_t best_point = 0;
if (is_flash) {
#if MSPI_TIMING_FLASH_DTR_MODE
best_point = s_tuning_cfg_drv.flash_select_best_tuning_config(timing_config, consecutive_length, end, reference_data, IS_DDR);
#elif MSPI_TIMING_FLASH_STR_MODE
best_point = s_tuning_cfg_drv.flash_select_best_tuning_config(timing_config, consecutive_length, end, NULL, IS_SDR);
#endif
s_tuning_cfg_drv.flash_set_best_tuning_config(&(timing_config->tuning_config_table[best_point]));
} else {
#if MSPI_TIMING_PSRAM_DTR_MODE
best_point = s_tuning_cfg_drv.psram_select_best_tuning_config(timing_config, consecutive_length, end, reference_data, IS_DDR);
#elif MSPI_TIMING_PSRAM_STR_MODE
best_point = s_tuning_cfg_drv.psram_select_best_tuning_config(timing_config, consecutive_length, end, NULL, IS_SDR);
#endif
s_tuning_cfg_drv.psram_set_best_tuning_config(&(timing_config->tuning_config_table[best_point]));
}
}
static void s_do_tuning(uint8_t *reference_data, void *timing_config, bool is_flash)
{
/**
* We use MSPI to tune the timing:
* 1. Get all MSPI sampling results.
* 2. Find the longest consecutive successful sampling points from the result above.
* 3. The middle one will be the best sampling point.
*/
uint32_t consecutive_length = 0;
uint32_t last_success_point = 0;
uint8_t sample_result[MSPI_TIMING_CONFIG_NUM_DEFAULT] = {0};
#if MSPI_TIMING_FLASH_NEEDS_TUNING
if (is_flash) {
s_tuning_cfg_drv.flash_init_mspi(FLASH_FREQUENCY_MHZ);
}
#endif
#if MSPI_TIMING_PSRAM_NEEDS_TUNING
if (!is_flash) {
s_tuning_cfg_drv.psram_init_mspi(CONFIG_SPIRAM_SPEED);
}
#endif
s_sweep_for_success_sample_points(reference_data, timing_config, is_flash, sample_result);
s_find_max_consecutive_success_points(sample_result, MSPI_TIMING_CONFIG_NUM_DEFAULT, &consecutive_length, &last_success_point);
s_select_best_tuning_config(timing_config, consecutive_length, last_success_point, reference_data, is_flash);
}
#endif //#if MSPI_TIMING_FLASH_NEEDS_TUNING || MSPI_TIMING_PSRAM_NEEDS_TUNING
/*------------------------------------------------------------------------------
* FLASH Timing Tuning
*----------------------------------------------------------------------------*/
#if MSPI_TIMING_FLASH_NEEDS_TUNING
void mspi_timing_flash_tuning(void)
{
/**
* set MSPI related regs to 20mhz configuration, to get reference data from FLASH
* see detailed comments in this function (`mspi_timing_enter_low_speed_mode`)
*/
mspi_timing_enter_low_speed_mode(true);
#if SOC_MEMSPI_TIMING_TUNING_BY_MSPI_DELAY
mspi_tuning_cfg_drv_t drv = {
.flash_tuning_type = MSPI_TIMING_TUNING_MSPI_DIN_DUMMY,
.flash_init_mspi = mspi_timing_flash_init,
.flash_tune_mspi = mspi_timing_config_flash_set_tuning_regs,
.flash_read = mspi_timing_config_flash_read_data,
.flash_select_best_tuning_config = mspi_timing_flash_select_best_tuning_config,
.flash_set_best_tuning_config = mspi_timing_flash_set_best_tuning_config,
};
bool is_flash = true;
s_register_config_driver(&drv, is_flash);
//Disable the variable dummy mode when doing timing tuning
mspi_timing_ll_enable_flash_variable_dummy(1, false); //GD flash will read error in variable mode with 20MHz
uint8_t reference_data[MSPI_TIMING_TEST_DATA_LEN] = {0};
s_tuning_cfg_drv.flash_read(reference_data, MSPI_TIMING_FLASH_TEST_DATA_ADDR, sizeof(reference_data));
mspi_timing_config_t timing_configs = {0};
mspi_timing_get_flash_tuning_configs(&timing_configs);
#endif //SOC_MEMSPI_TIMING_TUNING_BY_MSPI_DELAY
s_do_tuning(reference_data, &timing_configs, true);
mspi_timing_enter_high_speed_mode(true);
}
#else
void mspi_timing_flash_tuning(void)
{
//Empty function for compatibility, therefore upper layer won't need to know that FLASH in which operation mode and frequency config needs to be tuned
}
#endif //MSPI_TIMING_FLASH_NEEDS_TUNING
/*------------------------------------------------------------------------------
* PSRAM Timing Tuning
*----------------------------------------------------------------------------*/
#if MSPI_TIMING_PSRAM_NEEDS_TUNING
void mspi_timing_psram_tuning(void)
{
/**
* set MSPI related regs to 20mhz configuration, to write reference data to PSRAM
* see detailed comments in this function (`mspi_timing_enter_low_speed_mode`)
*/
mspi_timing_enter_low_speed_mode(true);
#if SOC_MEMSPI_TIMING_TUNING_BY_MSPI_DELAY
// write data into psram, used to do timing tuning test.
uint8_t reference_data[MSPI_TIMING_TEST_DATA_LEN];
for (int i=0; i < MSPI_TIMING_TEST_DATA_LEN/4; i++) {
((uint32_t *)reference_data)[i] = 0xa5ff005a;
}
mspi_timing_config_psram_write_data(reference_data, MSPI_TIMING_PSRAM_TEST_DATA_ADDR, MSPI_TIMING_TEST_DATA_LEN);
mspi_tuning_cfg_drv_t drv = {
.psram_tuning_type = MSPI_TIMING_TUNING_MSPI_DIN_DUMMY,
.psram_init_mspi = mspi_timing_psram_init,
.psram_tune_mspi = mspi_timing_config_psram_set_tuning_regs,
.psram_read = mspi_timing_config_psram_read_data,
.psram_select_best_tuning_config = mspi_timing_psram_select_best_tuning_config,
.psram_set_best_tuning_config = mspi_timing_psram_set_best_tuning_config,
};
bool is_flash = false;
s_register_config_driver(&drv, is_flash);
mspi_timing_config_t timing_configs = {0};
mspi_timing_get_psram_tuning_configs(&timing_configs);
#endif //#if SOC_MEMSPI_TIMING_TUNING_BY_MSPI_DELAY
//Disable the variable dummy mode when doing timing tuning
mspi_timing_ll_enable_flash_variable_dummy(1, false);
//Get required config, and set them to PSRAM related registers
s_do_tuning(reference_data, &timing_configs, false);
mspi_timing_enter_high_speed_mode(true);
}
#else
void mspi_timing_psram_tuning(void)
{
//Empty function for compatibility, therefore upper layer won't need to know that FLASH in which operation mode and frequency config needs to be tuned
}
#endif //MSPI_TIMING_PSRAM_NEEDS_TUNING
/*------------------------------------------------------------------------------
* APIs to make SPI0 (and SPI1) FLASH work for high/low freq
*----------------------------------------------------------------------------*/
void mspi_timing_enter_low_speed_mode(bool control_spi1)
{
#if SOC_MEMSPI_FLASH_CLK_SRC_IS_INDEPENDENT
spimem_flash_ll_set_clock_source(MSPI_CLK_SRC_ROM_DEFAULT);
#endif //SOC_MEMSPI_FLASH_CLK_SRC_IS_INDEPENDENT
#if SOC_SPI_MEM_SUPPORT_TIMING_TUNING
/**
* Here we are going to slow the SPI1 frequency to 20Mhz, so we need to set SPI1 din_num and din_mode regs.
*
* Because SPI0 and SPI1 share the din_num and din_mode regs, so if we clear SPI1 din_num and din_mode to
* 0, if the SPI0 flash module clock is still in high freq, it may not work correctly.
*
* Therefore, here we need to slow both the SPI0 and SPI1 and related timing tuning regs to 20Mhz configuration.
*
* Currently we only need to change these clocks on chips with timing tuning
* Should be extended to other no-timing-tuning chips if needed. e.g.:
* we still need to turn down Flash / PSRAM clock speed at a certain period of time
*/
mspi_timing_config_set_flash_clock(20, MSPI_TIMING_SPEED_MODE_LOW_PERF, control_spi1);
mspi_timing_config_set_psram_clock(20, MSPI_TIMING_SPEED_MODE_LOW_PERF, control_spi1);
#endif //#if SOC_SPI_MEM_SUPPORT_TIMING_TUNING
#if MSPI_TIMING_FLASH_NEEDS_TUNING || MSPI_TIMING_PSRAM_NEEDS_TUNING
mspi_timing_flash_config_clear_tuning_regs(control_spi1);
mspi_timing_psram_config_clear_tuning_regs(control_spi1);
#endif //#if MSPI_TIMING_FLASH_NEEDS_TUNING || MSPI_TIMING_PSRAM_NEEDS_TUNING
}
/**
* Set FLASH and PSRAM module clock, din_num, din_mode and extra dummy,
* according to the configuration got from timing tuning function (`calculate_best_flash_tuning_config`).
* iF control_spi1 == 1, will also update SPI1 timing registers. Should only be set to 1 when do tuning.
*
* This function should always be called after `mspi_timing_flash_tuning` or `calculate_best_flash_tuning_config`
*/
void mspi_timing_enter_high_speed_mode(bool control_spi1)
{
#if SOC_MEMSPI_FLASH_CLK_SRC_IS_INDEPENDENT
spimem_flash_ll_set_clock_source(MSPI_CLK_SRC_DEFAULT);
#endif //SOC_MEMSPI_FLASH_CLK_SRC_IS_INDEPENDENT
#if SOC_SPI_MEM_SUPPORT_TIMING_TUNING
/**
* Currently we only need to change these clocks on chips with timing tuning
* Should be extended to other no-timing-tuning chips if needed. e.g.:
* we still need to turn down Flash / PSRAM clock speed at a certain period of time
*/
mspi_timing_config_set_flash_clock(FLASH_FREQUENCY_MHZ, MSPI_TIMING_SPEED_MODE_NORMAL_PERF, control_spi1);
#if CONFIG_SPIRAM
mspi_timing_config_set_psram_clock(CONFIG_SPIRAM_SPEED, MSPI_TIMING_SPEED_MODE_NORMAL_PERF, control_spi1);
#endif //#if CONFIG_SPIRAM
#endif //#if SOC_SPI_MEM_SUPPORT_TIMING_TUNING
#if MSPI_TIMING_FLASH_NEEDS_TUNING || MSPI_TIMING_PSRAM_NEEDS_TUNING
mspi_timing_flash_config_set_tuning_regs(control_spi1);
mspi_timing_psram_config_set_tuning_regs(control_spi1);
#endif //#if MSPI_TIMING_FLASH_NEEDS_TUNING || MSPI_TIMING_PSRAM_NEEDS_TUNING
}
void mspi_timing_change_speed_mode_cache_safe(bool switch_down)
{
/**
* If a no-cache-freeze-supported chip needs timing tuning, add a protection way:
* - spinlock
* - or other way
*
* for preventing concurrent from MSPI to external memory
*/
#if SOC_CACHE_FREEZE_SUPPORTED
cache_hal_freeze(CACHE_TYPE_ALL);
#endif //#if SOC_CACHE_FREEZE_SUPPORTED
if (switch_down) {
//enter MSPI low speed mode, extra delays should be removed
mspi_timing_enter_low_speed_mode(false);
} else {
//enter MSPI high speed mode, extra delays should be considered
mspi_timing_enter_high_speed_mode(false);
}
#if SOC_CACHE_FREEZE_SUPPORTED
cache_hal_unfreeze(CACHE_TYPE_ALL);
#endif //#if SOC_CACHE_FREEZE_SUPPORTED
}
/*------------------------------------------------------------------------------
* APIs to inform SPI1 Flash driver of necessary timing configurations
*----------------------------------------------------------------------------*/
bool spi_timing_is_tuned(void)
{
#if MSPI_TIMING_FLASH_NEEDS_TUNING || MSPI_TIMING_PSRAM_NEEDS_TUNING
return true;
#else
return false;
#endif
}
#if MSPI_TIMING_FLASH_NEEDS_TUNING || MSPI_TIMING_PSRAM_NEEDS_TUNING
void spi_timing_get_flash_timing_param(spi_flash_hal_timing_config_t *out_timing_config)
{
// Get clock configuration directly from system.
out_timing_config->clock_config.spimem = mspi_timing_config_get_flash_clock_reg();
// Get extra dummy length here. Therefore, no matter what freq, or mode.
// If it needs tuning, it will return correct extra dummy len. If no tuning, it will return 0.
out_timing_config->extra_dummy = mspi_timing_config_get_flash_extra_dummy();
// Get CS setup/hold value here.
mspi_timing_config_get_cs_timing(&out_timing_config->cs_setup, &out_timing_config->cs_hold);
}
#else
void spi_timing_get_flash_timing_param(spi_flash_hal_timing_config_t *out_timing_config)
{
// This function shouldn't be called if timing tuning is not used.
abort();
}
#endif // MSPI_TIMING_FLASH_NEEDS_TUNING || MSPI_TIMING_PSRAM_NEEDS_TUNING
/*------------------------------------------------------------------------------
* Common settings
*----------------------------------------------------------------------------*/
void mspi_timing_set_pin_drive_strength(void)
{
#if SOC_MEMSPI_TIMING_TUNING_BY_MSPI_DELAY
//For now, set them all to 3. Need to check after QVL test results are out. TODO: IDF-3663
//Set default pin drive
mspi_timing_ll_set_all_pin_drive(0, 3);
#endif // #if SOC_MEMSPI_TIMING_TUNING_BY_MSPI_DELAY
}
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