/*
 * Copyright (C) 2023 Great Scott Gadgets
 *
 * This file is part of PortaPack.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; see the file COPYING.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street,
 * Boston, MA 02110-1301, USA.
 */

#ifndef __MAX283X_H__
#define __MAX283X_H__

#include "rf_path.hpp"

namespace max283x {

/*************************************************************************/

namespace lo {

constexpr std::array<rf::FrequencyRange, 4> band { {
	{ 2300000000, 2400000000 },
	{ 2400000000, 2500000000 },
	{ 2500000000, 2600000000 },
	{ 2600000000, 2700000000 },
} };

} /* namespace lo */

/*************************************************************************/

namespace lna {

constexpr range_t<int8_t> gain_db_range { 0, 40 };
constexpr int8_t gain_db_step = 8;

constexpr std::array<rf::FrequencyRange, 2> band { {
	{ 2300000000, 2500000000 },
	{ 2500000000, 2700000000 },
} };

} /* namespace lna */

/*************************************************************************/

namespace vga {

constexpr range_t<int8_t> gain_db_range { 0, 62 };
constexpr int8_t gain_db_step = 2;

} /* namespace vga */

/*************************************************************************/

namespace tx {

constexpr range_t<int8_t> gain_db_range { 0, 47 };
constexpr int8_t gain_db_step = 1;
}

/*************************************************************************/

namespace filter {

constexpr std::array<uint32_t, 16> bandwidths {
	/* Assumption: these values are in ascending order */
	 1750000,
	 2500000,	/* Some documentation says 2.25MHz */
	 3500000,
	 5000000,
	 5500000,
	 6000000,
	 7000000,
	 8000000,
	 9000000,
	10000000,
	12000000,
	14000000,
	15000000,
	20000000,
	24000000,
	28000000,
};

constexpr auto bandwidth_minimum = bandwidths[0];
constexpr auto bandwidth_maximum = bandwidths[bandwidths.size() - 1];

} /* namespace filter */

/*************************************************************************/

enum Mode {
	Shutdown,
	Standby,
	Receive,
	Transmit,
};

using reg_t = uint16_t;
using address_t = uint8_t;

class MAX283x {
public:
	virtual ~MAX283x() = default;

	virtual void init();
	virtual void set_mode(const Mode mode);

	virtual void set_tx_vga_gain(const int_fast8_t db);
	virtual void set_lna_gain(const int_fast8_t db);
	virtual void set_vga_gain(const int_fast8_t db);
	virtual void set_lpf_rf_bandwidth(const uint32_t bandwidth_minimum);

	virtual bool set_frequency(const rf::Frequency lo_frequency);

	virtual void set_rx_lo_iq_calibration(const size_t v);
	virtual void set_rx_buff_vcm(const size_t v);

	virtual reg_t temp_sense();

	virtual reg_t read(const address_t reg_num);
};

}

#endif/*__MAX283X_H__*/