diff --git a/src/efinix.cpp b/src/efinix.cpp
index e52448e..0433f55 100644
--- a/src/efinix.cpp
+++ b/src/efinix.cpp
@@ -100,30 +100,8 @@ void Efinix::program(unsigned int offset)
 	flash.erase_and_prog(offset, data, length);
 
 	/* verify write if required */
-	if (_verify) {
-		printInfo("Verifying write");
-		std::string verify_data;
-		verify_data.resize(length);
-		printInfo("Read flash ", false);
-		if (0 != flash.read(offset, (uint8_t*)&verify_data[0], length)) {
-			printError("FAIL");
-			return;
-		} else {
-			printSuccess("DONE");
-		}
-
-		ProgressBar progress("Check", length, 50, _quiet);
-		for (int i = 0; i < length; i++) {
-			if ((uint8_t)verify_data[i] != data[i]) {
-				progress.fail();
-				printError("Verification failed at " +
-						std::to_string(offset + i));
-				return;
-			}
-			progress.display(i);
-		}
-		progress.done();
-	}
+	if (_verify)
+		flash.verify(offset, data, length);
 
 	_spi->gpio_set(_rst_pin);
 	usleep(12000);
@@ -145,37 +123,20 @@ bool Efinix::dumpFlash(const std::string &filename,
 	uint32_t timeout = 1000;
 	_spi->gpio_clear(_rst_pin);
 
-	std::string data;
-	data.resize(len);
-
 	/* prepare SPI access */
 	printInfo("Read Flash ", false);
 	try {
 		SPIFlash flash(reinterpret_cast<SPIInterface *>(_spi), _verbose);
 		flash.reset();
 		flash.power_up();
-		flash.read_id();
-		flash.read_status_reg();
-		flash.read(base_addr, (uint8_t*)&data[0], len);
+		flash.dump(filename, base_addr, len);
 	} catch (std::exception &e) {
 		printError("Fail");
 		printError(std::string(e.what()));
 		return false;
 	}
 
-	FILE *fd = fopen(filename.c_str(), "wb");
-	if (!fd) {
-		printError("Fail");
-		return false;
-	}
-
-	fwrite(data.c_str(), sizeof(uint8_t), len, fd);
-	fclose(fd);
-
-	printSuccess("Done");
-
-	/* prepare SPI access */
-
+	/* release SPI access */
 	_spi->gpio_set(_rst_pin);
 	usleep(12000);
 
diff --git a/src/ice40.cpp b/src/ice40.cpp
index 3fbccdb..f797cc9 100644
--- a/src/ice40.cpp
+++ b/src/ice40.cpp
@@ -80,30 +80,8 @@ void Ice40::program(unsigned int offset)
 	flash.read_id();
 	flash.erase_and_prog(offset, data, length);
 
-	if (_verify) {
-		printInfo("Verifying write");
-		std::string verify_data;
-		verify_data.resize(length);
-		printInfo("Read flash ", false);
-		if (0 != flash.read(offset, (uint8_t*)&verify_data[0], length)) {
-			printError("FAIL");
-			return;
-		} else {
-			printSuccess("DONE");
-		}
-
-		ProgressBar progress("Check", length, 50, _quiet);
-		for (int i = 0; i < length; i++) {
-			if ((uint8_t)verify_data[i] != data[i]) {
-				progress.fail();
-				printError("Verification failed at " +
-						std::to_string(offset + i));
-				return;
-			}
-			progress.display(i);
-		}
-		progress.done();
-	}
+	if (_verify)
+		flash.verify(offset, data, length);
 
 	_spi->gpio_set(_rst_pin);
 	usleep(12000);
@@ -125,36 +103,20 @@ bool Ice40::dumpFlash(const std::string &filename,
 	uint32_t timeout = 1000;
 	_spi->gpio_clear(_rst_pin);
 
-	std::string data;
-	data.resize(len);
-
 	/* prepare SPI access */
 	printInfo("Read Flash ", false);
 	try {
 		SPIFlash flash(reinterpret_cast<SPIInterface *>(_spi), _verbose);
 		flash.reset();
 		flash.power_up();
-		flash.read_id();
-		flash.read_status_reg();
-		flash.read(base_addr, (uint8_t*)&data[0], len);
+		flash.dump(filename, base_addr, len);
 	} catch (std::exception &e) {
 		printError("Fail");
 		printError(std::string(e.what()));
 		return false;
 	}
 
-	FILE *fd = fopen(filename.c_str(), "wb");
-	if (!fd) {
-		printError("Fail");
-		return false;
-	}
-
-	fwrite(data.c_str(), sizeof(uint8_t), len, fd);
-	fclose(fd);
-
-	printSuccess("Done");
-
-	/* prepare SPI access */
+	/* release SPI access */
 
 	_spi->gpio_set(_rst_pin);
 	usleep(12000);
diff --git a/src/lattice.cpp b/src/lattice.cpp
index 8fe4f12..ef9bf46 100644
--- a/src/lattice.cpp
+++ b/src/lattice.cpp
@@ -447,33 +447,12 @@ bool Lattice::program_extFlash(unsigned int offset)
 	flash.read_status_reg();
 	flash.erase_and_prog(offset, data, length);
 
-	if (_verify) {
-		printInfo("Verifying write");
-		string verify_data;
-		verify_data.resize(length);
-		printInfo("Read flash ", false);
-		if (0 != flash.read(offset, (uint8_t*)&verify_data[0], length)) {
-			printError("FAIL");
-			return false;
-		} else {
-			printSuccess("DONE");
-		}
-
-		ProgressBar progress("Check", length, 50, _quiet);
-		for (int i = 0; i < length; i++) {
-			if ((uint8_t)verify_data[i] != data[i]) {
-				progress.fail();
-				printError("Verification failed at " +
-						std::to_string(offset + i));
-				return false;
-			}
-			progress.display(i);
-		}
-		progress.done();
-	}
+	int ret = true;
+	if (_verify)
+		ret = flash.verify(offset, data, length);
 
 	delete _bit;
-	return true;
+	return ret;
 }
 
 bool Lattice::program_flash(unsigned int offset)
@@ -580,8 +559,6 @@ bool Lattice::dumpFlash(const string &filename,
 
 	DisableISC();
 
-	string data;
-	data.resize(len);
 	/* switch to SPI mode */
 	_jtag->shiftIR(0x3A, 8, Jtag::EXIT1_IR);
 	uint8_t tmp[2] = {0xFE, 0x68};
@@ -590,17 +567,7 @@ bool Lattice::dumpFlash(const string &filename,
 	/* prepare SPI access */
 	SPIFlash flash(this, _verbose);
 	flash.reset();
-	flash.read_id();
-	flash.read_status_reg();
-	flash.read(base_addr, (uint8_t*)&data[0], len);
-
-	FILE *fd = fopen(filename.c_str(), "wb");
-	if (!fd) {
-		return false;
-	}
-
-	fwrite(data.c_str(), sizeof(uint8_t), len, fd);
-	fclose(fd);
+	flash.dump(filename, base_addr, len);
 
 	/* ISC REFRESH 0x79 */
 	printInfo("Refresh: ", false);
diff --git a/src/main.cpp b/src/main.cpp
index 0b2d0fa..3399db5 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -203,7 +203,8 @@ int main(int argc, char **argv)
 			flash.reset();
 			flash.read_id();
 
-			if (!args.bit_file.empty() || !args.file_type.empty()) {
+			if (args.prg_type != Device::RD_FLASH &&
+					(!args.bit_file.empty() || !args.file_type.empty())) {
 				printInfo("Open file " + args.bit_file + " ", false);
 				try {
 					bit = new RawParser(args.bit_file, false);
@@ -226,10 +227,13 @@ int main(int argc, char **argv)
 				flash.erase_and_prog(args.offset, bit->getData(), bit->getLength()/8);
 
 				if (args.verify)
-					printWarn("writing verification not supported");
+					flash.verify(args.offset, bit->getData(), bit->getLength() / 8);
 
 				delete bit;
+			} else if (args.prg_type == Device::RD_FLASH) {
+				flash.dump(args.bit_file, args.offset, args.file_size);
 			}
+
 			if (board->reset_pin)
 				spi->gpio_set(board->reset_pin, true);
 		}
diff --git a/src/xilinx.cpp b/src/xilinx.cpp
index 5580ded..4378525 100644
--- a/src/xilinx.cpp
+++ b/src/xilinx.cpp
@@ -172,34 +172,8 @@ void Xilinx::program_spi(ConfigBitstreamParser * bit, unsigned int offset)
 	spiFlash.erase_and_prog(offset, data, length);
 
 	/* verify write if required */
-	if (_verify) {
-		std::string verify_data;
-		verify_data.resize(256);
-
-		ProgressBar progress("Verifying write", length, 50, _quiet);
-		int rd_length = 256;
-		for (int i = 0; i < length; i+=rd_length) {
-			if (rd_length + i > length)
-				rd_length = length - i;
-			if (0 != spiFlash.read(offset + i, (uint8_t*)&verify_data[0],
-						rd_length)) {
-				progress.fail();
-				printError("Failed to read flash");
-				return;
-			}
-
-			for (int ii = 0; ii < rd_length; ii++) {
-				if ((uint8_t)verify_data[ii] != data[i + ii]) {
-					progress.fail();
-					printError("Verification failed at " +
-							std::to_string(offset + i + ii));
-					return;
-				}
-			}
-			progress.display(i);
-		}
-		progress.done();
-	}
+	if (_verify)
+		spiFlash.verify(offset, data, length, 256);
 }
 
 void Xilinx::program_mem(ConfigBitstreamParser *bitfile)
@@ -314,49 +288,26 @@ void Xilinx::program_mem(ConfigBitstreamParser *bitfile)
 bool Xilinx::dumpFlash(const std::string &filename,
 		uint32_t base_addr, uint32_t len)
 {
+	int ret = true;
 	/* first need to have bridge in RAM */
 	if (load_bridge() == false)
 		return false;
 
 	/* prepare SPI access */
 	SPIFlash flash(this, _verbose);
-	flash.reset();
-	flash.read_id();
-	flash.read_status_reg();
 
-	FILE *fd = fopen(filename.c_str(), "wb");
-	if (!fd) {
-		printError("Open dump file failed\n");
-		return false;
+	try {
+		flash.reset();
+		ret = flash.dump(filename, base_addr, len, 256);
+	} catch (std::exception &e) {
+		printError(e.what());
+		ret = false;
 	}
 
-	uint32_t rd_length = 256;
-	std::string data;
-	data.resize(rd_length);
-
-	ProgressBar progress("Dump flash", len, 50, _quiet);
-
-	for (uint32_t i = 0; i < len; i+=rd_length) {
-		if (rd_length + i > len)
-			rd_length = len - i;
-		if (0 != flash.read(base_addr + i, (uint8_t*)&data[0],
-					rd_length)) {
-			progress.fail();
-			printError("Failed to read flash");
-			return false;
-		}
-
-		fwrite(data.c_str(), sizeof(uint8_t), rd_length, fd);
-
-		progress.display(i);
-	}
-	progress.done();
-	fclose(fd);
-
 	/* reset device */
 	reset();
 
-	return false;
+	return ret;
 }
 
 /*