espressif/esp-idf
1
0
Fork 1
mirror of https://github.com/espressif/esp-idf.git synced 2026-05-05 12:25:03 +02:00
Code Issues Packages Projects Releases Wiki Activity

mspi: make cpu clock source switch safe

Browse Source 
For some of the MSPI high frequency setting (e.g. 80M DDR mode Flash or PSRAM), timing tuning is required.
Certain delays will be added to the MSPI RX direction. When system clock switches down, the delays should be
cleared. When system clock switches up, the delays should be restored.
This commit is contained in:
Armando
2021-10-19 12:25:08 +08:00
parent 7c3a37977f
commit c331c85318
8 changed files with 81 additions and 70 deletions
Download Patch File Download Diff File Expand all files Collapse all files
components/spi_flash/spi_flash_timing_tuning.c
+29 -3
View File
@@ -17,6 +17,7 @@
#include "soc/soc.h"
#if CONFIG_IDF_TARGET_ESP32S3
#include "esp32s3/spi_timing_config.h"
#include "esp32s3/rom/cache.h"
#endif
#define ARRAY_SIZE(arr) (sizeof(arr)/sizeof(*(arr)))
@@ -377,6 +378,7 @@ void spi_timing_psram_tuning(void)
}
#endif //SPI_TIMING_PSRAM_NEEDS_TUNING
/*------------------------------------------------------------------------------
* APIs to make SPI0 (and SPI1) FLASH work for high/low freq
*----------------------------------------------------------------------------*/
@@ -460,9 +462,33 @@ void spi_timing_enter_mspi_high_speed_mode(bool control_spi1)
#endif
}
/**
* Should be only used by SPI1 Flash driver to know the necessary timing registers
*/
void spi_timing_change_speed_mode_cache_safe(bool switch_down)
{
Cache_Freeze_ICache_Enable(1);
Cache_Freeze_DCache_Enable(1);
if (switch_down) {
//enter MSPI low speed mode, extra delays should be removed
spi_timing_enter_mspi_low_speed_mode(false);
} else {
//enter MSPI high speed mode, extra delays should be considered
spi_timing_enter_mspi_high_speed_mode(false);
}
Cache_Freeze_DCache_Disable();
Cache_Freeze_ICache_Disable();
}
/*------------------------------------------------------------------------------
* APIs to inform SPI1 Flash driver of necessary timing configurations
*----------------------------------------------------------------------------*/
bool spi_timing_is_tuned(void)
{
#if SPI_TIMING_FLASH_NEEDS_TUNING || SPI_TIMING_PSRAM_NEEDS_TUNING
return true;
#else
return false;
#endif
}
#if SPI_TIMING_FLASH_NEEDS_TUNING || SPI_TIMING_PSRAM_NEEDS_TUNING
void spi_timing_get_flash_timing_param(spi_flash_hal_timing_config_t *out_timing_config)
{