//
// Copyright 2010 Ettus Research LLC
//
// 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 3 of the License, 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.  If not, see <http://www.gnu.org/licenses/>.
//

#include "usrp2_impl.hpp"
#include "usrp2_regs.hpp"
#include <uhd/usrp/misc_utils.hpp>
#include <uhd/usrp/dsp_utils.hpp>
#include <uhd/usrp/mboard_props.hpp>
#include <uhd/utils/assert.hpp>
#include <uhd/utils/algorithm.hpp>
#include <boost/bind.hpp>
#include <iostream>

using namespace uhd;
using namespace uhd::usrp;

/***********************************************************************
 * Structors
 **********************************************************************/
usrp2_mboard_impl::usrp2_mboard_impl(
    size_t index,
    transport::udp_simple::sptr ctrl_transport,
    size_t recv_frame_size
):
    _index(index),
    _recv_frame_size(recv_frame_size),
    _iface(usrp2_iface::make(ctrl_transport))
{
    //contruct the interfaces to mboard perifs
    _clock_ctrl = usrp2_clock_ctrl::make(_iface);
    _codec_ctrl = usrp2_codec_ctrl::make(_iface);
    _serdes_ctrl = usrp2_serdes_ctrl::make(_iface);

    //TODO move to dsp impl...
    //load the allowed decim/interp rates
    //_USRP2_RATES = range(4, 128+1, 1) + range(130, 256+1, 2) + range(260, 512+1, 4)
    _allowed_decim_and_interp_rates.clear();
    for (size_t i = 4; i <= 128; i+=1){
        _allowed_decim_and_interp_rates.push_back(i);
    }
    for (size_t i = 130; i <= 256; i+=2){
        _allowed_decim_and_interp_rates.push_back(i);
    }
    for (size_t i = 260; i <= 512; i+=4){
        _allowed_decim_and_interp_rates.push_back(i);
    }

    //Issue a stop streaming command (in case it was left running).
    //Since this command is issued before the networking is setup,
    //most if not all junk packets will never make it to the socket.
    this->issue_ddc_stream_cmd(stream_cmd_t::STREAM_MODE_STOP_CONTINUOUS);

    //init the rx control registers
    _iface->poke32(U2_REG_RX_CTRL_NSAMPS_PER_PKT, _recv_frame_size);
    _iface->poke32(U2_REG_RX_CTRL_NCHANNELS, 1);
    _iface->poke32(U2_REG_RX_CTRL_CLEAR_OVERRUN, 1); //reset
    _iface->poke32(U2_REG_RX_CTRL_VRT_HEADER, 0
        | (0x1 << 28) //if data with stream id
        | (0x1 << 26) //has trailer
        | (0x3 << 22) //integer time other
        | (0x1 << 20) //fractional time sample count
    );
    _iface->poke32(U2_REG_RX_CTRL_VRT_STREAM_ID, 0);
    _iface->poke32(U2_REG_RX_CTRL_VRT_TRAILER, 0);
    _iface->poke32(U2_REG_TIME64_TPS, size_t(get_master_clock_freq()));

    //init the tx control registers
    _iface->poke32(U2_REG_TX_CTRL_NUM_CHAN, 0);    //1 channel
    _iface->poke32(U2_REG_TX_CTRL_CLEAR_STATE, 1); //reset
    _iface->poke32(U2_REG_TX_CTRL_REPORT_SID, 1);  //sid 1 (different from rx)
    _iface->poke32(U2_REG_TX_CTRL_POLICY, U2_FLAG_TX_CTRL_POLICY_NEXT_PACKET);

    //init the ddc
    init_ddc_config();

    //init the duc
    init_duc_config();

    //initialize the clock configuration
    init_clock_config();

    //init the codec before the dboard
    codec_init();

    //init the tx and rx dboards (do last)
    dboard_init();

    //set default subdev specs
    (*this)[MBOARD_PROP_RX_SUBDEV_SPEC] = subdev_spec_t();
    (*this)[MBOARD_PROP_TX_SUBDEV_SPEC] = subdev_spec_t();
}

usrp2_mboard_impl::~usrp2_mboard_impl(void){
    /* NOP */
}

/***********************************************************************
 * Helper Methods
 **********************************************************************/
void usrp2_mboard_impl::init_clock_config(void){
    //setup the clock configuration settings
    _clock_config.ref_source = clock_config_t::REF_INT;
    _clock_config.pps_source = clock_config_t::PPS_SMA;
    _clock_config.pps_polarity = clock_config_t::PPS_NEG;

    //update the clock config (sends a control packet)
    update_clock_config();
}

void usrp2_mboard_impl::update_clock_config(void){
    boost::uint32_t pps_flags = 0;

    //translate pps source enums
    switch(_clock_config.pps_source){
    case clock_config_t::PPS_SMA:  pps_flags |= U2_FLAG_TIME64_PPS_SMA;  break;
    case clock_config_t::PPS_MIMO: pps_flags |= U2_FLAG_TIME64_PPS_MIMO; break;
    default: throw std::runtime_error("usrp2: unhandled clock configuration pps source");
    }

    //translate pps polarity enums
    switch(_clock_config.pps_polarity){
    case clock_config_t::PPS_POS: pps_flags |= U2_FLAG_TIME64_PPS_POSEDGE; break;
    case clock_config_t::PPS_NEG: pps_flags |= U2_FLAG_TIME64_PPS_NEGEDGE; break;
    default: throw std::runtime_error("usrp2: unhandled clock configuration pps polarity");
    }

    //set the pps flags
    _iface->poke32(U2_REG_TIME64_FLAGS, pps_flags);

    //clock source ref 10mhz
    switch(_clock_config.ref_source){
    case clock_config_t::REF_INT : _iface->poke32(U2_REG_MISC_CTRL_CLOCK, 0x10); break;
    case clock_config_t::REF_SMA : _iface->poke32(U2_REG_MISC_CTRL_CLOCK, 0x1C); break;
    case clock_config_t::REF_MIMO: _iface->poke32(U2_REG_MISC_CTRL_CLOCK, 0x15); break;
    default: throw std::runtime_error("usrp2: unhandled clock configuration reference source");
    }

    //clock source ref 10mhz
    bool use_external = _clock_config.ref_source != clock_config_t::REF_INT;
    _clock_ctrl->enable_external_ref(use_external);
}

void usrp2_mboard_impl::set_time_spec(const time_spec_t &time_spec, bool now){
    //set the ticks
    _iface->poke32(U2_REG_TIME64_TICKS, time_spec.get_tick_count(get_master_clock_freq()));

    //set the flags register
    boost::uint32_t imm_flags = (now)? U2_FLAG_TIME64_LATCH_NOW : U2_FLAG_TIME64_LATCH_NEXT_PPS;
    _iface->poke32(U2_REG_TIME64_IMM, imm_flags);

    //set the seconds (latches in all 3 registers)
    _iface->poke32(U2_REG_TIME64_SECS, boost::uint32_t(time_spec.get_full_secs()));
}

void usrp2_mboard_impl::handle_overflow(void){
    _iface->poke32(U2_REG_RX_CTRL_CLEAR_OVERRUN, 1);
    if (_continuous_streaming){ //re-issue the stream command if already continuous
        this->issue_ddc_stream_cmd(stream_cmd_t::STREAM_MODE_START_CONTINUOUS);
    }
}

void usrp2_mboard_impl::issue_ddc_stream_cmd(const stream_cmd_t &stream_cmd){
    _continuous_streaming = stream_cmd.stream_mode == stream_cmd_t::STREAM_MODE_START_CONTINUOUS;
    _iface->poke32(U2_REG_RX_CTRL_STREAM_CMD, dsp_type1::calc_stream_cmd_word(
        stream_cmd, _recv_frame_size
    ));
    _iface->poke32(U2_REG_RX_CTRL_TIME_SECS,  boost::uint32_t(stream_cmd.time_spec.get_full_secs()));
    _iface->poke32(U2_REG_RX_CTRL_TIME_TICKS, stream_cmd.time_spec.get_tick_count(get_master_clock_freq()));
}

/***********************************************************************
 * MBoard Get Properties
 **********************************************************************/
static const std::string dboard_name = "0";

void usrp2_mboard_impl::get(const wax::obj &key_, wax::obj &val){
    named_prop_t key = named_prop_t::extract(key_);

    //handle the get request conditioned on the key
    switch(key.as<mboard_prop_t>()){
    case MBOARD_PROP_NAME:
        val = str(boost::format("usrp2 mboard%d - rev %s") % _index % _iface->mb_eeprom["rev"]);
        return;

    case MBOARD_PROP_OTHERS:
        val = prop_names_t();
        return;

    case MBOARD_PROP_RX_DBOARD:
        UHD_ASSERT_THROW(key.name == dboard_name);
        val = _rx_dboard_proxy->get_link();
        return;

    case MBOARD_PROP_RX_DBOARD_NAMES:
        val = prop_names_t(1, dboard_name);
        return;

    case MBOARD_PROP_TX_DBOARD:
        UHD_ASSERT_THROW(key.name == dboard_name);
        val = _tx_dboard_proxy->get_link();
        return;

    case MBOARD_PROP_TX_DBOARD_NAMES:
        val = prop_names_t(1, dboard_name);
        return;

    case MBOARD_PROP_RX_DSP:
        UHD_ASSERT_THROW(key.name == "");
        val = _rx_dsp_proxy->get_link();
        return;

    case MBOARD_PROP_RX_DSP_NAMES:
        val = prop_names_t(1, "");
        return;

    case MBOARD_PROP_TX_DSP:
        UHD_ASSERT_THROW(key.name == "");
        val = _tx_dsp_proxy->get_link();
        return;

    case MBOARD_PROP_TX_DSP_NAMES:
        val = prop_names_t(1, "");
        return;

    case MBOARD_PROP_CLOCK_CONFIG:
        val = _clock_config;
        return;

    case MBOARD_PROP_TIME_NOW:{
            usrp2_iface::pair64 time64(
                _iface->peek64(U2_REG_TIME64_SECS_RB, U2_REG_TIME64_TICKS_RB)
            );
            val = time_spec_t(
                time64.first, time64.second, get_master_clock_freq()
            );
        }
        return;

    case MBOARD_PROP_RX_SUBDEV_SPEC:
        val = _rx_subdev_spec;
        return;

    case MBOARD_PROP_TX_SUBDEV_SPEC:
        val = _tx_subdev_spec;
        return;

    case MBOARD_PROP_EEPROM_MAP:
        val = _iface->mb_eeprom;
        return;

    default: UHD_THROW_PROP_GET_ERROR();
    }
}

/***********************************************************************
 * MBoard Set Properties
 **********************************************************************/
void usrp2_mboard_impl::set(const wax::obj &key, const wax::obj &val){

    //handle the get request conditioned on the key
    switch(key.as<mboard_prop_t>()){

    case MBOARD_PROP_CLOCK_CONFIG:
        _clock_config = val.as<clock_config_t>();
        update_clock_config();
        return;

    case MBOARD_PROP_TIME_NOW:
        set_time_spec(val.as<time_spec_t>(), true);
        return;

    case MBOARD_PROP_TIME_NEXT_PPS:
        set_time_spec(val.as<time_spec_t>(), false);
        return;

    case MBOARD_PROP_STREAM_CMD:
        issue_ddc_stream_cmd(val.as<stream_cmd_t>());
        return;

    case MBOARD_PROP_RX_SUBDEV_SPEC:
        _rx_subdev_spec = val.as<subdev_spec_t>();
        verify_rx_subdev_spec(_rx_subdev_spec, this->get_link());
        //sanity check
        UHD_ASSERT_THROW(_rx_subdev_spec.size() == 1);
        //set the mux
        _iface->poke32(U2_REG_DSP_RX_MUX, dsp_type1::calc_rx_mux_word(
            _dboard_manager->get_rx_subdev(_rx_subdev_spec.front().sd_name)[SUBDEV_PROP_CONNECTION].as<subdev_conn_t>()
        ));
        return;

    case MBOARD_PROP_TX_SUBDEV_SPEC:
        _tx_subdev_spec = val.as<subdev_spec_t>();
        verify_tx_subdev_spec(_tx_subdev_spec, this->get_link());
        //sanity check
        UHD_ASSERT_THROW(_tx_subdev_spec.size() == 1);
        //set the mux
        _iface->poke32(U2_REG_DSP_TX_MUX, dsp_type1::calc_tx_mux_word(
            _dboard_manager->get_tx_subdev(_tx_subdev_spec.front().sd_name)[SUBDEV_PROP_CONNECTION].as<subdev_conn_t>()
        ));
        return;

    case MBOARD_PROP_EEPROM_MAP:
        // Step1: commit the map, writing only those values set.
        // Step2: readback the entire eeprom map into the iface.
        val.as<mboard_eeprom_t>().commit(*_iface, mboard_eeprom_t::MAP_N100);
        _iface->mb_eeprom = mboard_eeprom_t(*_iface, mboard_eeprom_t::MAP_N100);
        return;

    default: UHD_THROW_PROP_SET_ERROR();
    }
}