colognechip: added a workaround to drive reset pin with DirtyJTAG cable

(requires a recent DirtyJTAG firmware)

Author: trabucayre

src/colognechip.cpp

@@ -46,6 +46,12 @@ CologneChip::CologneChip(Jtag* jtag, const std::string &filename,
 		ftdi_board_name = std::regex_replace(board_name, std::regex("jtag"), "spi");
 	} else if (cable_name == "gatemate_pgm") {
 		ftdi_board_name = "gatemate_pgm_spi";
+	} else if (cable_name == "dirtyJtag") {
+		_dirtyjtag = reinterpret_cast<DirtyJtag *>(_jtag->_jtag);
+		_rstn_pin = (1 << 6);
+		_done_pin = 0;
+		_fail_pin = 0;
+		_oen_pin  = 0;
 	}
 
 	if (ftdi_board_name != "") {
@@ -84,6 +90,10 @@ void CologneChip::reset()
 		_ftdi_jtag->gpio_clear(_rstn_pin | _oen_pin);
 		usleep(SLEEP_US);
 		_ftdi_jtag->gpio_set(_rstn_pin);
+	} else if (_dirtyjtag) {
+		_dirtyjtag->gpio_clear(_rstn_pin);
+		_dirtyjtag->gpio_set(_rstn_pin);
+		usleep(SLEEP_US);
 	}
 }
 
@@ -123,10 +133,7 @@ void CologneChip::waitCfgDone()
 	}
 }
 
-/**
- * Dump flash contents to file. Works in both SPI and JTAG-SPI-bypass mode.
- */
-bool CologneChip::detect_flash()
+bool CologneChip::prepare_flash_access()
 {
 	if (_spi) {
 		/* enable output and hold reset */
@@ -135,9 +142,37 @@ bool CologneChip::detect_flash()
 		/* enable output and disable reset */
 		_ftdi_jtag->gpio_clear(_oen_pin);
 		_ftdi_jtag->gpio_set(_rstn_pin);
+	} else if (_dirtyjtag) {
+		_dirtyjtag->gpio_clear(_rstn_pin);
+		_dirtyjtag->gpio_set(_rstn_pin);
+		usleep(SLEEP_US);
 	}
 
+	return true;
+}
+
+bool CologneChip::post_flash_access()
+{
+	if (_spi) {
+		/* disable output and release reset */
+		_spi->gpio_set(_rstn_pin | _oen_pin);
+	} else if (_ftdi_jtag) {
+		/* disable output */
+		_ftdi_jtag->gpio_set(_oen_pin);
+	}
+	usleep(SLEEP_US);
+
+	return true;
+}
+
+/**
+ * Dump flash contents to file. Works in both SPI and JTAG-SPI-bypass mode.
+ */
+bool CologneChip::detect_flash()
+{
 	/* prepare SPI access */
+	prepare_flash_access();
+
 	printInfo("Read Flash ", false);
 	try {
 		std::unique_ptr<SPIFlash> flash(_spi ?
@@ -151,33 +186,17 @@ bool CologneChip::detect_flash()
 		return false;
 	}
 
-	if (_spi) {
-		/* disable output and release reset */
-		_spi->gpio_set(_rstn_pin | _oen_pin);
-	} else if (_ftdi_jtag) {
-		/* disable output */
-		_ftdi_jtag->gpio_set(_oen_pin);
-	}
-	usleep(SLEEP_US);
-
-	return true;
+	return post_flash_access();
 }
 
 /**
  * Dump flash contents to file. Works in both SPI and JTAG-SPI-bypass mode.
  */
 bool CologneChip::dumpFlash(uint32_t base_addr, uint32_t len)
 {
-	if (_spi) {
-		/* enable output and hold reset */
-		_spi->gpio_clear(_rstn_pin | _oen_pin);
-	} else if (_ftdi_jtag) {
-		/* enable output and disable reset */
-		_ftdi_jtag->gpio_clear(_oen_pin);
-		_ftdi_jtag->gpio_set(_rstn_pin);
-	}
-
 	/* prepare SPI access */
+	prepare_flash_access();
+
 	printInfo("Read Flash ", false);
 	try {
 		std::unique_ptr<SPIFlash> flash(_spi ?
@@ -190,16 +209,7 @@ bool CologneChip::dumpFlash(uint32_t base_addr, uint32_t len)
 		return false;
 	}
 
-	if (_spi) {
-		/* disable output and release reset */
-		_spi->gpio_set(_rstn_pin | _oen_pin);
-	} else if (_ftdi_jtag) {
-		/* disable output */
-		_ftdi_jtag->gpio_set(_oen_pin);
-	}
-	usleep(SLEEP_US);
-
-	return true;
+	return post_flash_access();
 }
 
 /**

src/colognechip.hpp

@@ -12,6 +12,7 @@
 #include <string>
 
 #include "device.hpp"
+#include "dirtyJtag.hpp"
 #include "jtag.hpp"
 #include "ftdispi.hpp"
 #include "ftdiJtagMPSSE.hpp"
@@ -48,6 +49,10 @@ class CologneChip: public Device, SPIInterface {
 		uint32_t idCode() override {return 0;}
 		void reset() override;
 
+	protected:
+		bool prepare_flash_access() override;
+		bool post_flash_access() override;
+
 	private:
 		void programSPI_sram(const uint8_t *data, int length);
 		void programSPI_flash(unsigned int offset, const uint8_t *data, int length,
@@ -65,6 +70,7 @@ class CologneChip: public Device, SPIInterface {
 
 		FtdiSpi *_spi = NULL;
 		FtdiJtagMPSSE *_ftdi_jtag = NULL;
+		DirtyJtag *_dirtyjtag = NULL;
 		uint16_t _rstn_pin;
 		uint16_t _done_pin;
 		uint16_t _fail_pin;