Real flash chip mode (espressif#7239)

Author: Jason2866

cores/esp32/Esp.cpp

@@ -30,6 +30,7 @@ extern "C" {
 }
 #include <MD5Builder.h>
 
+#include "soc/spi_reg.h"
 #include "esp_system.h"
 #ifdef ESP_IDF_VERSION_MAJOR // IDF 4+
 #if CONFIG_IDF_TARGET_ESP32 // ESP32/PICO-D4
@@ -55,6 +56,14 @@ extern "C" {
 #define ESP_FLASH_IMAGE_BASE 0x1000
 #endif
 
+// REG_SPI_BASE is not defined for S3/C3 ??
+
+#if CONFIG_IDF_TARGET_ESP32S3 || CONFIG_IDF_TARGET_ESP32C3
+ #ifndef REG_SPI_BASE
+ #define REG_SPI_BASE(i) (DR_REG_SPI1_BASE + (((i)>1) ? (((i)* 0x1000) + 0x20000) : (((~(i)) & 1)* 0x1000 )))
+ #endif // REG_SPI_BASE
+#endif // TARGET
+
 /**
  * User-defined Literals
  * usage:
@@ -192,7 +201,7 @@ static uint32_t sketchSize(sketchSize_t response) {
  return data.image_len;
  }
 }
- 
+
 uint32_t EspClass::getSketchSize () {
  return sketchSize(SKETCH_SIZE_TOTAL);
 }
@@ -329,11 +338,26 @@ uint32_t EspClass::getFlashChipSpeed(void)
 
 FlashMode_t EspClass::getFlashChipMode(void)
 {
- esp_image_header_t fhdr;
- if(flashRead(ESP_FLASH_IMAGE_BASE, (uint32_t*)&fhdr, sizeof(esp_image_header_t)) && fhdr.magic != ESP_IMAGE_HEADER_MAGIC) {
- return FM_UNKNOWN;
- }
- return magicFlashChipMode(fhdr.spi_mode);
+ #if CONFIG_IDF_TARGET_ESP32S2
+ uint32_t spi_ctrl = REG_READ(PERIPHS_SPI_FLASH_CTRL);
+ #else
+ uint32_t spi_ctrl = REG_READ(SPI_CTRL_REG(0));
+ #endif
+ /* Not all of the following constants are already defined in older versions of spi_reg.h, so do it manually for now*/
+ if (spi_ctrl & BIT(24)) { //SPI_FREAD_QIO
+ return (FM_QIO);
+ } else if (spi_ctrl & BIT(20)) { //SPI_FREAD_QUAD
+ return (FM_QOUT);
+ } else if (spi_ctrl & BIT(23)) { //SPI_FREAD_DIO
+ return (FM_DIO);
+ } else if (spi_ctrl & BIT(14)) { // SPI_FREAD_DUAL
+ return (FM_DOUT);
+ } else if (spi_ctrl & BIT(13)) { //SPI_FASTRD_MODE
+ return (FM_FAST_READ);
+ } else {
+ return (FM_SLOW_READ);
+ }
+ return (FM_DOUT);
 }
 
 uint32_t EspClass::magicFlashChipSize(uint8_t byte)