// SPDX-License-Identifier: Apache-2.0
/*
 * Copyright (C) 2019 Gwenhael Goavec-Merou <gwenhael.goavec-merou@trabucayre.com>
 */

#include "altera.hpp"

#include <string.h>

#include <string>

#include "common.hpp"
#include "jtag.hpp"
#include "device.hpp"
#include "epcq.hpp"
#include "progressBar.hpp"
#include "rawParser.hpp"
#include "pofParser.hpp"
#if defined (_WIN64) || defined (_WIN32)
#include "pathHelper.hpp"
#endif

#define IDCODE 6
#define USER0  0x0C
#define USER1  0x0E
#define BYPASS 0x3FF
#define IRLENGTH 10

Altera::Altera(Jtag *jtag, const std::string &filename,
	const std::string &file_type, Device::prog_type_t prg_type,
	const std::string &device_package,
	const std::string &spiOverJtagPath, bool verify, int8_t verbose,
	bool skip_load_bridge, bool skip_reset):
	Device(jtag, filename, file_type, verify, verbose),
	SPIInterface(filename, verbose, 256, verify, skip_load_bridge,
				 skip_reset),
	_device_package(device_package), _spiOverJtagPath(spiOverJtagPath),
	_vir_addr(0x1000), _vir_length(14), _clk_period(1)
{
	if (prg_type == Device::RD_FLASH) {
		_mode = Device::READ_MODE;
	} else {
		if (!_file_extension.empty()) {
			if (_file_extension == "svf") {
				_mode = Device::MEM_MODE;
			} else if (_file_extension == "rpd" ||
					_file_extension == "rbf") {
				if (prg_type == Device::WR_SRAM)
					_mode = Device::MEM_MODE;
				else
					_mode = Device::SPI_MODE;
			} else if (_file_extension == "pof") { // MAX10
				_mode = Device::FLASH_MODE;
			} else { // unknown type -> sanity check
				if (prg_type == Device::WR_SRAM) {
					printError("file has an unknown type:");
					printError("\tplease use rbf or svf file");
					printError("\tor use --write-flash with: ", false);
					printError("-b board_name or --fpga_part xxxx");
					throw std::runtime_error("Error: wrong file");
				} else {
					_mode = Device::SPI_MODE;
				}
			}
		}
	}

	/* check device family */
	_idcode = _jtag->get_target_device_id();
	string family = fpga_list[_idcode].family;
	if (family == "MAX 10") {
		_fpga_family = MAX10_FAMILY;
	} else {
		_fpga_family = CYCLONE_MISC; // FIXME
	}

}

Altera::~Altera()
{}
void Altera::reset()
{
	/* PULSE_NCONFIG */
	unsigned char tx_buff[2] = {0x01, 0x00};
	_jtag->set_state(Jtag::TEST_LOGIC_RESET);
	_jtag->shiftIR(tx_buff, NULL, IRLENGTH);
	_jtag->toggleClk(1);
	_jtag->set_state(Jtag::TEST_LOGIC_RESET);
}

void Altera::programMem(RawParser &_bit)
{
	int byte_length = _bit.getLength()/8;
	const uint8_t *data = _bit.getData();

	unsigned char cmd[2];
	unsigned char tx[864/8], rx[864/8];

	memset(tx, 0, 864/8);
	/* enddr idle
	 * endir irpause
	 * state idle
	 */
	/* ir 0x02 IRLENGTH */
	*reinterpret_cast<uint16_t *>(cmd) = 0x02;
	_jtag->shiftIR(cmd, NULL, IRLENGTH, Jtag::PAUSE_IR);
	/* RUNTEST IDLE 12000 TCK ENDSTATE IDLE; */
	_jtag->set_state(Jtag::RUN_TEST_IDLE);
	_jtag->toggleClk(1000000/_clk_period);
	/* write */
	ProgressBar progress("Load SRAM", byte_length, 50, _quiet);

	int xfer_len = 512;
	int tx_len;
	Jtag::tapState_t tx_end;

	for (int i=0; i < byte_length; i+=xfer_len) {
		if (i + xfer_len > byte_length) {  // last packet with some size
			tx_len = (byte_length - i) * 8;
			tx_end = Jtag::EXIT1_DR;
		} else {
			tx_len = xfer_len * 8;
			tx_end = Jtag::SHIFT_DR;
		}
		_jtag->shiftDR(data+i, NULL, tx_len, tx_end);
		progress.display(i);
	}
	progress.done();

	/* reboot */
	/* SIR 10 TDI (004); */
	*reinterpret_cast<uint16_t *>(cmd) = 0x04;
	_jtag->shiftIR(cmd, NULL, IRLENGTH, Jtag::PAUSE_IR);
	/* RUNTEST 60 TCK; */
	_jtag->set_state(Jtag::RUN_TEST_IDLE);
	_jtag->toggleClk(5000/_clk_period);
	/*
	 * SDR 864 TDI
	 * (000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000)
	 * TDO (00000000000000000000
	 *     0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000080000000000000000000000000000000000000000)
	 *     MASK (00000000000000000000000000000000000000000000000000
	 *         0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000080000000000000000000000000000000000000000);
	 */
	_jtag->shiftDR(tx, rx, 864, Jtag::RUN_TEST_IDLE);
	/* TBD -> something to check */
	/* SIR 10 TDI (003); */
	*reinterpret_cast<uint16_t *>(cmd) = 0x003;
	_jtag->shiftIR(cmd, NULL, IRLENGTH, Jtag::PAUSE_IR);
	/* RUNTEST 49152 TCK; */
	_jtag->set_state(Jtag::RUN_TEST_IDLE);
	_jtag->toggleClk(4099645/_clk_period);
	/* RUNTEST 512 TCK; */
	_jtag->set_state(Jtag::RUN_TEST_IDLE);
	_jtag->toggleClk(512);
	 /* SIR 10 TDI (3FF); */
	*reinterpret_cast<uint16_t *>(cmd) = BYPASS;
	_jtag->shiftIR(cmd, NULL, IRLENGTH, Jtag::PAUSE_IR);

	/* RUNTEST 12000 TCK; */
	_jtag->set_state(Jtag::RUN_TEST_IDLE);
	_jtag->toggleClk(1000000/_clk_period);
	/* -> idle */
	_jtag->set_state(Jtag::RUN_TEST_IDLE);
}

bool Altera::post_flash_access()
{
	if (_skip_reset)
		printInfo("Skip resetting device");
	else
		reset();
	return true;
}

bool Altera::prepare_flash_access()
{
	if (_skip_load_bridge) {
		printInfo("Skip loading bridge for spiOverjtag");
		return true;
	}
	return load_bridge();
}

bool Altera::load_bridge()
{
	std::string bitname;
	if (!_spiOverJtagPath.empty()) {
		bitname = _spiOverJtagPath;
	} else {
		if (_device_package.empty()) {
			printError("Can't program SPI flash: missing device-package information");
			return false;
		}

		bitname = get_shell_env_var("OPENFPGALOADER_SOJ_DIR", DATA_DIR "/openFPGALoader");
#ifdef HAS_ZLIB
		bitname += "/spiOverJtag_" + _device_package + ".rbf.gz";
#else
		bitname += "/spiOverJtag_" + _device_package + ".rbf";
#endif
	}

#if defined (_WIN64) || defined (_WIN32)
	/* Convert relative path embedded at compile time to an absolute path */
	bitname = PathHelper::absolutePath(bitname);
#endif

	std::cout << "use: " << bitname << std::endl;

	/* first: load spi over jtag */
	try {
		RawParser bridge(bitname, false);
		bridge.parse();
		programMem(bridge);
	} catch (std::exception &e) {
		printError(e.what());
		throw std::runtime_error(e.what());
	}

	return true;
}

void Altera::program(unsigned int offset, bool unprotect_flash)
{
	if (_mode == Device::NONE_MODE)
		return;

	/* Access clk frequency to store clk_period required
	 * for all operations. Can't be done at CTOR because
	 * frequency be changed between these 2 methods.
	 *
	 */
	_clk_period = 1e9/static_cast<float>(_jtag->getClkFreq());

	/* Specific case for MAX10 */
	if (_fpga_family == MAX10_FAMILY) {
		max10_program();
		return;
	}

	/* in all case we consider svf is mandatory
	 * MEM_MODE : svf file provided for constructor
	 *            is the bitstream to use
	 * SPI_MODE : svf file provided is bridge to have
	 *            access to the SPI flash
	 */
	/* mem mode -> svf */
	if (_mode == Device::MEM_MODE) {
		RawParser _bit(_filename, false);
		_bit.parse();
		programMem(_bit);
	} else if (_mode == Device::SPI_MODE) {
		// reverse only bitstream raw binaries data no
		bool reverseOrder = false;
		if (_file_extension == "rbf" || _file_extension == "rpd")
			reverseOrder = true;

		/* prepare data to write */
		const uint8_t *data = NULL;
		int length = 0;

		RawParser bit(_filename, reverseOrder);
		try {
			bit.parse();
			data = bit.getData();
			length = bit.getLength() / 8;
		} catch (std::exception &e) {
			printError(e.what());
			throw std::runtime_error(e.what());
		}

		if (!SPIInterface::write(offset, data, length, unprotect_flash))
			throw std::runtime_error("Fail to write data");
	}
}

uint32_t Altera::idCode()
{
	unsigned char tx_data[4] = {IDCODE};
	unsigned char rx_data[4];
	_jtag->go_test_logic_reset();
	_jtag->shiftIR(tx_data, NULL, IRLENGTH);
	memset(tx_data, 0, 4);
	_jtag->shiftDR(tx_data, rx_data, 32);
	return ((rx_data[0] & 0x000000ff) |
		((rx_data[1] << 8) & 0x0000ff00) |
		((rx_data[2] << 16) & 0x00ff0000) |
		((rx_data[3] << 24) & 0xff000000));
}

/* MAX 10 specifics methods */
/* ------------------------ */
#define MAX10_ISC_ADDRESS_SHIFT {0x03, 0x02}
#define MAX10_ISC_READ          {0x05, 0x02}
#define MAX10_ISC_ENABLE        {0xcc, 0x02}
#define MAX10_ISC_DISABLE       {0x01, 0x02}
#define MAX10_ISC_ADDRESS_SHIFT {0x03, 0x02}
#define MAX10_ISC_PROGRAM       {0xf4, 0x02}
#define MAX10_DSM_ICB_PROGRAM   {0xF4, 0x03}
#define MAX10_DSM_VERIFY        {0x07, 0x03}
#define MAX10_DSM_CLEAR         {0xf2, 0x03}
#define MAX10_BYPASS            {0xFF, 0x03}

typedef struct {
	uint32_t dsm_addr;
	uint32_t dsm_len;  // 32bits
	uint32_t ufm_addr; // UFM1 addr
	uint32_t ufm_len[2];
	uint32_t cfm_addr; // CFM2 addr
	uint32_t cfm_len[3];
} max10_mem_t;

static const std::map<uint32_t, max10_mem_t> max10_memory_map = {
	{0x031820dd, {
		0x0000, 512, // DSM
		0x0200, {4096, 4096}, // UFM
		0x2200, {35840, 14848, 20992}} // CFM
	},
};

void Altera::max10_program()
{
	POFParser _bit(_filename, true);
	_bit.parse();
	_bit.displayHeader();

	uint32_t base_addr; // CFM2 addr
	uint32_t offset = 0;

	auto mem_map = max10_memory_map.find(_idcode);
	if (mem_map == max10_memory_map.end()) {
		printError("Model not supported. Please update max10_memory_map.");
		throw std::runtime_error("Model not supported. Please update max10_memory_map.");
	}
	max10_mem_t mem = mem_map->second;

	const uint8_t *cfm_data = _bit.getData("CFM0");
	const uint8_t *ufm_data = _bit.getData("UFM");
	const uint8_t *dsm_data = _bit.getData("ICB");
	const int dsm_len = _bit.getLength("ICB") / 32; // getLength (bits) dsm_len in 32bits word

	max_10_flow_enable();

	max10_flow_erase();
	max10_dsm_verify();

	/* Write */
	// CFM2->0
	offset = 0;
	base_addr = mem.cfm_addr;
	for (int i = 2; i >= 0; i--) {
		printInfo("Write CFM" + std::to_string(i));
		writeXFM(cfm_data, base_addr, offset, mem.cfm_len[i]);
		base_addr += mem.cfm_len[i];
		offset += (mem.cfm_len[i] * 4);
	}
	// UFM1->0
	offset = 0;
	base_addr = mem.ufm_addr;
	for (int i = 1; i >= 0; i--) {
		printInfo("Write UFM" + std::to_string(i));
		writeXFM(ufm_data, base_addr, offset, mem.ufm_len[i]);
		offset += mem.ufm_len[i] * 4;
		base_addr += mem.ufm_len[i];
	}

	/* Verify */
	if (_verify) {
		// CFM2->0
		offset = 0;
		base_addr = mem.cfm_addr;
		for (int i = 2; i >= 0; i--) {
			printInfo("Verify CFM" + std::to_string(i));
			verifyxFM(cfm_data, base_addr, offset, mem.cfm_len[i]);
			base_addr += mem.cfm_len[i];
			offset += (mem.cfm_len[i] * 4);
		}

		// UFM1->0
		offset = 0;
		base_addr = mem.ufm_addr;
		for (int i = 1; i >= 0; i--) {
			printInfo("Verify UFM" + std::to_string(i));
			verifyxFM(ufm_data, base_addr, offset, mem.ufm_len[i]);
			offset += mem.ufm_len[i] * 4;
			base_addr += mem.ufm_len[i];
		}
	}

	// DSM

	max10_dsm_program(dsm_data, dsm_len);
	max10_dsm_verify();

	max10_flow_program_donebit();
	max10_dsm_verify();
	max10_dsm_program_success();
	max10_dsm_verify();

	/* disable ISC flow */
	max_10_flow_disable();
	_jtag->set_state(Jtag::RUN_TEST_IDLE);
}

static void word_to_array(uint32_t in, uint8_t *out) {
	out[0] = (in >>  0) & 0xff;
	out[1] = (in >>  8) & 0xff;
	out[2] = (in >> 16) & 0xff;
	out[3] = (in >> 24) & 0xff;
}

void Altera::max10_flow_erase()
{
	const uint32_t dsm_clear_delay = 350000120 / _clk_period;
	const uint8_t dsm_clear[2] = MAX10_DSM_CLEAR;

	max10_addr_shift(0x000000);

	_jtag->shiftIR((unsigned char *)dsm_clear, NULL, IRLENGTH);
	_jtag->set_state(Jtag::RUN_TEST_IDLE);
	_jtag->toggleClk(dsm_clear_delay);
}

void Altera::writeXFM(const uint8_t *cfg_data, uint32_t base_addr, uint32_t offset, uint32_t len)
{
	uint8_t *ptr = (uint8_t *)cfg_data + offset; // FIXME: maybe adding offset here ?
	const uint8_t isc_program[2] = MAX10_ISC_PROGRAM;

	/* precompute some delays required during loop */
	const uint32_t isc_program2_delay = 320000 / _clk_period; // ns must be 350us

	ProgressBar progress("Verify", len, 50, _quiet);
	for (uint32_t i = 0; i < len; i+=512) {
		bool must_send_sir = true;
		uint32_t max = (i + 512 <= len)? 512 : len - i;
		for (uint32_t ii = 0; ii < max; ii++) {
			const uint32_t data = ARRAY2INT32(ptr);
			progress.display(i);

			/* flash was erased before: to save time skip write when cfg_data
			 * contains only bit set to high
			 */
			if (data == 0xffffffff) {
				must_send_sir = true;
				ptr += 4;
				continue;
			}

			/* TODO: match more or less svf but not bsdl */
			if (must_send_sir) {
				/* Set base addr */
				max10_addr_shift(base_addr + i + ii);

				/* set ISC_PROGRAM/DSM_PROGRAM */
				_jtag->shiftIR((unsigned char *)isc_program, NULL, IRLENGTH, Jtag::PAUSE_IR);
				must_send_sir = false;
			}

			_jtag->shiftDR(ptr, NULL, 32, Jtag::RUN_TEST_IDLE);
			_jtag->toggleClk(isc_program2_delay);
			ptr += 4;
		}
	}
	progress.done();
}

uint32_t Altera::verifyxFM(const uint8_t *cfg_data, uint32_t base_addr, uint32_t offset,
	uint32_t len)
{
	uint8_t *ptr = (uint8_t *)cfg_data + offset; // avoid passing offset ?

	//const uint32_t isc_read_delay = 5120 / _clk_period;

	const uint8_t read_cmd[2] = MAX10_ISC_READ;
	uint32_t errors = 0;

	ProgressBar progress("Verify", len, 50, _quiet);
	for (uint32_t i = 0; i < len; i+=512) {
		const uint32_t max = (i + 512 <= len)? 512 : len - i;
		progress.display(i);

		/* send address */
		max10_addr_shift(base_addr + i);

		/* send read command */
		_jtag->shiftIR((unsigned char *)read_cmd, NULL, IRLENGTH, Jtag::PAUSE_IR);

		for (uint32_t ii = 0; ii < max; ii++) {
			uint8_t data[4];

			_jtag->shiftDR(NULL, data, 32, Jtag::RUN_TEST_IDLE);
			/* TODO: compare */
			for (uint8_t pos = 0; pos < 4; pos++) {
				if (ptr[pos] != data[pos]) {
					printf("Error@%d: %02x %02x %02x %02x ", pos, data[0], data[1], data[2], data[3]);
					printf("%02x %02x %02x %02x\n", ptr[0], ptr[1], ptr[2], ptr[3]);
					errors++;
					break;
				}
			}
			ptr += 4;
		}
	}
	if (errors == 0)
		progress.done();
	else
		progress.fail();

	return errors;
}

void Altera::max_10_flow_enable()
{
	const int enable_delay  = 350000120 / _clk_period; // must be 1 tck
	const uint8_t cmd[2] = MAX10_ISC_ENABLE;

	_jtag->shiftIR((unsigned char *)cmd, NULL, IRLENGTH);
	_jtag->set_state(Jtag::RUN_TEST_IDLE);
	_jtag->toggleClk(enable_delay);
}

void Altera::max_10_flow_disable()
{
	//ISC_DISABLE  WAIT  100.0e-3)
	//BYPASS	   WAIT  305.0e-6
	const int disable_len = (1e9 * 350e-3) / _clk_period;
	const int bypass_len = (3 + (1e9 * 1e-3) / _clk_period);
	const uint8_t cmd0[2] = MAX10_ISC_DISABLE;
	const uint8_t cmd1[2] = MAX10_BYPASS;

	_jtag->shiftIR((unsigned char *)cmd0, NULL, IRLENGTH);
	_jtag->set_state(Jtag::RUN_TEST_IDLE);
	_jtag->toggleClk(disable_len);

	_jtag->shiftIR((unsigned char *)cmd1, NULL, IRLENGTH);
	_jtag->set_state(Jtag::RUN_TEST_IDLE);
	_jtag->toggleClk(bypass_len);
}

void Altera::max10_dsm_program(const uint8_t *dsm_data, const uint32_t dsm_len)
{
	const int program_del = 5120 / _clk_period;
	const int write_del = 320000 / _clk_period;

	uint32_t *icb_dat = (uint32_t *)dsm_data;
	const int len = dsm_len / 32;
	const uint8_t cmd[2] = MAX10_DSM_ICB_PROGRAM;
	uint8_t dat[4];
	/* Instead of writing the full section
	 * only write word with a value != 0xffffffff
	 */
	for (int i = 0; i < len; i++) {
		if (icb_dat[i] != 0xffffffff) {
			/* send addr */
			max10_addr_shift(i);
			word_to_array(icb_dat[i], dat);

			_jtag->shiftIR((unsigned char *)cmd, NULL, IRLENGTH);
			_jtag->set_state(Jtag::RUN_TEST_IDLE);
			_jtag->toggleClk(program_del);
			_jtag->shiftDR(dat, NULL, 32, Jtag::RUN_TEST_IDLE);
			_jtag->toggleClk(write_del); // 305.0e-6
		}
	}
}

bool Altera::max10_dsm_verify()
{
	const uint32_t dsm_delay = 5120 / _clk_period;
	const uint8_t cmd[2] = MAX10_DSM_VERIFY;

	const uint8_t tx = 0x00; // 1 in bsdl, 0 in svf
	uint8_t rx=0;

	_jtag->shiftIR((unsigned char *)cmd, NULL, IRLENGTH);
	_jtag->set_state(Jtag::RUN_TEST_IDLE);
	_jtag->toggleClk(dsm_delay);
	_jtag->shiftDR(&tx, &rx, 1, Jtag::RUN_TEST_IDLE);

	printf("BSM: %02x\n", rx);
	if ((rx & 0x01) == 0x01) {
		printInfo("DSM Verify: OK");
		return true;
	}
	printError("DSM Verify: KO");
	return false;
}

void Altera::max10_addr_shift(uint32_t addr)
{
	const uint8_t cmd[2] = MAX10_ISC_ADDRESS_SHIFT;
	const uint32_t base_addr = POFParser::reverse_32(addr) >> 9;

	uint8_t addr_arr[4];
	word_to_array(base_addr, addr_arr);
	//printf("%08x %08x\n", addr, base_addr);

	/* FIXME/TODO:
	 * 1. in bsdl file no delay between IR and DR
	 *	but 1TCK after DR
	 * 2. PAUSE IR is a state where loop is possible -> required to move
	 *	to RUN_TEST_IDLE ?
	 */
	_jtag->shiftIR((unsigned char *)cmd, NULL, IRLENGTH, Jtag::PAUSE_IR);
	_jtag->set_state(Jtag::RUN_TEST_IDLE);
	_jtag->toggleClk(5120 / _clk_period); // fine delay ?
	_jtag->shiftDR(addr_arr, NULL, 23, Jtag::RUN_TEST_IDLE);
}

void Altera::max10_dsm_program_success()
{
	const uint32_t prog_len = 5120 / _clk_period; // ??
	const uint32_t prog2_len = 320000 / _clk_period; // ??
													 //
	const uint8_t cmd[2] = MAX10_DSM_ICB_PROGRAM;

	uint8_t magic[4];
	word_to_array(0x6C48A50F, magic); // FIXME: uses define instead

	max10_addr_shift(0x00000b);

	/* Send 'Magic' code */
	_jtag->shiftIR((unsigned char *)cmd, NULL, IRLENGTH, Jtag::PAUSE_IR);
	_jtag->set_state(Jtag::RUN_TEST_IDLE);
	_jtag->toggleClk(prog_len); // fine delay ?
	_jtag->shiftDR(magic, NULL, 32, Jtag::RUN_TEST_IDLE);
	_jtag->toggleClk(prog2_len); // must wait 305.0e-6
}

void Altera::max10_flow_program_donebit()
{
	const uint32_t addr_shift_delay = 5120 / _clk_period; // ??
	const uint32_t icb_program_delay = 320000 / _clk_period; // ??

	uint8_t cmd[2] = MAX10_DSM_ICB_PROGRAM;

	uint8_t magic[4];
	word_to_array(0x6C48A50F, magic); // FIXME: uses define instead

	/* Send target address */
	max10_addr_shift(0x000009);

	/* Send 'Magic' code */
	_jtag->shiftIR(cmd, NULL, IRLENGTH, Jtag::PAUSE_IR);
	_jtag->set_state(Jtag::RUN_TEST_IDLE);
	_jtag->toggleClk(addr_shift_delay); // fine delay ?
	_jtag->shiftDR(magic, NULL, 32, Jtag::RUN_TEST_IDLE);
	_jtag->toggleClk(icb_program_delay); // must wait 305.0e-6
}

/* SPI interface */

int Altera::spi_put(uint8_t cmd, const uint8_t *tx, uint8_t *rx, uint32_t len)
{
	/* +1 because send first cmd + len byte + 1 for rx due to a delay of
	 * one bit
	 */
	int xfer_len = len + 1 + ((rx == NULL) ? 0 : 1);
	uint8_t jtx[xfer_len];
	uint8_t jrx[xfer_len];

	if (tx != NULL) {
		for (uint32_t i = 0; i < len; i++)
			jtx[i] = RawParser::reverseByte(tx[i]);
	}

	shiftVIR(RawParser::reverseByte(cmd));
	shiftVDR(jtx, (rx) ? jrx : NULL, 8 * xfer_len);

	if (rx) {
		for (uint32_t i = 0; i < len; i++) {
			rx[i] = RawParser::reverseByte(jrx[i+1] >> 1) | (jrx[i+2] & 0x01);
		}
	}

	return 0;
}

int Altera::spi_put(const uint8_t *tx, uint8_t *rx, uint32_t len)
{
	return spi_put(tx[0], &tx[1], rx, len-1);
}

int Altera::spi_wait(uint8_t cmd, uint8_t mask, uint8_t cond,
		uint32_t timeout, bool verbose)
{
	uint8_t rx[3];
	uint8_t tmp;
	uint32_t count = 0;
	bool first = true;

	shiftVIR(RawParser::reverseByte(cmd));
	do {
		if (first) {
			first = false;
			shiftVDR(NULL, rx, 24, Jtag::SHIFT_DR);
			tmp = RawParser::reverseByte(rx[1] >> 1) | (rx[2] & 0x01);
		} else {
			_jtag->shiftDR(NULL, rx, 16, Jtag::SHIFT_DR);
			tmp = RawParser::reverseByte(rx[0] >> 1) | (rx[1] & 0x01);
		}

		count++;
		if (count == timeout){
			printf("timeout: %x %x %x\n", tmp, rx[0], rx[1]);
			break;
		}

		if (verbose) {
			printf("%x %x %x %u\n", tmp, mask, cond, count);
		}
	} while ((tmp & mask) != cond);
	_jtag->set_state(Jtag::UPDATE_DR);

	if (count == timeout) {
		printf("%x\n", tmp);
		std::cout << "wait: Error" << std::endl;
		return -1;
	}
	return 0;
}

/* VIrtual Jtag Access */
void Altera::shiftVIR(uint32_t reg)
{
	uint32_t len = _vir_length;
	uint32_t mask = (1 << len) - 1;
	uint32_t tmp = (reg & mask) | _vir_addr;
	uint8_t *tx = (uint8_t *) & tmp;
	uint8_t tx_ir[2] = {USER1, 0};

	_jtag->set_state(Jtag::RUN_TEST_IDLE);

	_jtag->shiftIR(tx_ir, NULL, IRLENGTH, Jtag::UPDATE_IR);
	/* len + 1 + 1 => IRLENGTH + Slave ID + 1 (ASMI/SFL) */
	_jtag->shiftDR(tx, NULL, len/* + 2*/, Jtag::UPDATE_DR);
}

void Altera::shiftVDR(uint8_t * tx, uint8_t * rx, uint32_t len,
		Jtag::tapState_t end_state, bool debug)
{
	(void) debug;
	uint8_t tx_ir[2] = {USER0, 0};
	_jtag->shiftIR(tx_ir, NULL, IRLENGTH, Jtag::UPDATE_IR);
	_jtag->shiftDR(tx, rx, len, end_state);
}