Merge pull request #364 from Icenowy/gw5ast-138k

Add GW5AST-138 support

src/fsparser.cpp

@@ -180,6 +180,13 @@ int FsParser::parse()
 		case 0x0000281b: /* GW2A-55    */
 			nb_line = 2038;
 			break;
+		case 0x0001081b: /* GW5AST-138 */
+			/*
+			 * FIXME: Lack of information,
+			 * so just accept everything.
+			 */
+			nb_line = 65535;
+			break;
 		default:
 			printWarn("Warning: Unknown IDCODE");
 			nb_line = 0;

src/gowin.cpp

@@ -78,6 +78,7 @@ Gowin::Gowin(Jtag *jtag, const string filename, const string &file_type, std::st
 		Device::prog_type_t prg_type, bool external_flash,
 		bool verify, int8_t verbose): Device(jtag, filename, file_type,
 		verify, verbose), is_gw1n1(false), is_gw2a(false),
+		is_gw5a(false),
 		_external_flash(external_flash),
 		_spi_sck(BSCAN_SPI_SCK), _spi_cs(BSCAN_SPI_CS),
 		_spi_di(BSCAN_SPI_DI), _spi_do(BSCAN_SPI_DO),
@@ -160,6 +161,15 @@ Gowin::Gowin(Jtag *jtag, const string filename, const string &file_type, std::st
 			/* FIXME: implement GW2 checksum calculation */
 			skip_checksum = true;
 			is_gw2a = true;
+			break;
+		case 0x0001081b: /* GW5AST-138 */
+		case 0x0001181b: /* GW5AT-138 */
+		case 0x0001281b: /* GW5A-25 */
+			_external_flash = true;
+			/* FIXME: implement GW5 checksum calculation */
+			skip_checksum = true;
+			is_gw5a = true;
+			break;
 	};
 
 	if (mcufw.size() > 0) {
@@ -256,6 +266,8 @@ void Gowin::program(unsigned int offset, bool unprotect_flash)
 	length = _fs->getLength();
 
 	if (_mode == FLASH_MODE) {
+		if (is_gw5a)
+			throw std::runtime_error("Error: write to flash on GW5A is not yet supported");
 		if (!_external_flash) { /* write into internal flash */
 			programFlash();
 		} else { /* write bitstream into external flash */
@@ -302,6 +314,13 @@ void Gowin::program(unsigned int offset, bool unprotect_flash)
 
 	wr_rd(READ_IDCODE, NULL, 0, NULL, 0);
 
+	/* Work around FPGA stuck in Bad Command status */
+	if (is_gw5a) {
+		reset();
+		_jtag->set_state(Jtag::RUN_TEST_IDLE);
+		_jtag->toggleClk(1000000);
+	}
+
 	/* erase SRAM */
 	if (!EnableCfg())
 		return;
@@ -618,6 +637,11 @@ bool Gowin::flashSRAM(uint8_t *data, int length)
 
 	ProgressBar progress("Flash SRAM", byte_length, 50, _quiet);
 
+	/* UG704 3.4.3 */
+	if (is_gw5a) {
+		wr_rd(INIT_ADDR, NULL, 0, NULL, 0);
+	}
+
 	/* 2.2.6.4 */
 	wr_rd(XFER_WRITE, NULL, 0, NULL, 0);
 

src/gowin.hpp

@@ -63,6 +63,7 @@ class Gowin: public Device, SPIInterface {
 		ConfigBitstreamParser *_fs;
 		bool is_gw1n1;
 		bool is_gw2a;
+		bool is_gw5a;
 		bool skip_checksum;   /**< bypass checksum verification (GW2A) */
 		bool _external_flash; /**< select between int or ext flash */
 		uint8_t _spi_sck;     /**< clk signal offset in bscan SPI */

src/part.hpp

@@ -227,6 +227,11 @@ static std::map <uint32_t, fpga_model> fpga_list = {
 	/* Gowin GW2 */
 	{0x0000081b, {"Gowin", "GW2A", "GW2A(R)-18(C)", 8}},
 
+	/* Gowin GW5 */
+	{0x0001081b, {"Gowin", "GW5AST", "GW5AST-138", 8}},
+	{0x0001181b, {"Gowin", "GW5AT",  "GW5AT-138",  8}},
+	{0x0001281b, {"Gowin", "GW5A",   "GW5A-25",    8}},
+
 	/**************************************************************************/
 	/*                           CologneChip                                  */
 	/**************************************************************************/