ice40: fix detect_flash

Author: trabucayre

src/ice40.cpp

@@ -148,6 +148,25 @@ void Ice40::program(unsigned int offset, bool unprotect_flash)
 	post_flash_access();
 }
 
+bool Ice40::detect_flash()
+{
+	/* prepare SPI access */
+	prepare_flash_access();
+	printInfo("Read Flash ", false);
+	try {
+		SPIFlash flash(reinterpret_cast<SPIInterface *>(_spi), false, _verbose_level);
+		flash.read_id();
+		flash.display_status_reg();
+	} catch (std::exception &e) {
+		printError("Fail");
+		printError(std::string(e.what()));
+		return false;
+	}
+
+	/* release SPI access / reload */
+	return post_flash_access();
+}
+
 bool Ice40::dumpFlash(uint32_t base_addr, uint32_t len)
 {
 	/* prepare SPI access */

src/ice40.hpp

@@ -24,9 +24,7 @@ class Ice40: public Device, SPIInterface {
 		void program(unsigned int offset, bool unprotect_flash) override;
 		bool program_cram(const uint8_t *data, uint32_t length);
 		bool dumpFlash(uint32_t base_addr, uint32_t len) override;
-		bool detect_flash() override {
-			return SPIInterface::detect_flash();
-		}
+		bool detect_flash() override;
 		bool protect_flash(uint32_t len) override;
 		bool unprotect_flash() override;
 		bool bulk_erase_flash() override;