SignalToNoise1.c
Author: cmaier@cmassoc.net

    /*====================================================================*
     *
     *   Copyright (c) 2013 Qualcomm Atheros, Inc.
     *
     *   All rights reserved.
     *
     *   Redistribution and use in source and binary forms, with or
     *   without modification, are permitted (subject to the limitations
     *   in the disclaimer below) provided that the following conditions
     *   are met:
     *
     *   * Redistributions of source code must retain the above copyright
     *     notice, this list of conditions and the following disclaimer.
     *
     *   * Redistributions in binary form must reproduce the above
     *     copyright notice, this list of conditions and the following
     *     disclaimer in the documentation and/or other materials
     *     provided with the distribution.
     *
     *   * Neither the name of Qualcomm Atheros nor the names of
     *     its contributors may be used to endorse or promote products
     *     derived from this software without specific prior written
     *     permission.
     *
     *   NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE
     *   GRANTED BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE
     *   COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
     *   IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     *   WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     *   PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
     *   OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     *   NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     *   LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     *   HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     *   CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
     *   OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
     *   SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     *
     *--------------------------------------------------------------------*/

    /*====================================================================*
     *
     *   signed SignalToNoise1 (struct plc * plc);
     *
     *   plc.h
     *
     *
     *   Contributor(s):
     *      Charles Maier <cmaier@qca.qualcomm.com>
     *
     *--------------------------------------------------------------------*/

    #ifndef SIGNALTONOISE1_SOURCE
    #define SIGNALTONOISE1_SOURCE

    #include <stdio.h>
    #include <stdint.h>

    #include "../tools/flags.h"
    #include "../tools/error.h"
    #include "../tools/endian.h"
    #include "../plc/plc.h"

    #ifndef TONEMAPS1_SOURCE

    static uint8_t const mod2bits [AMP_BITS] =

    {
    	0,
    	1,
    	2,
    	3,
    	4,
    	6,
    	8,
    	10,
    	12
    };

    static uint8_t const mod2db [AMP_BITS] =

    {
    	0,
    	2,
    	4,
    	7,
    	10,
    	16,
    	22,
    	28,
    	36
    };

    #endif

    signed SignalToNoise1 (struct plc * plc)

    {
    	struct channel * channel = (struct channel *)(plc->channel);
    	struct message * message = (struct message *)(plc->message);
    	byte tonemap [PLC_SLOTS + 1][AMP_CARRIERS >> 1];
    	byte GIL [PLC_SLOTS];
    	byte AGC [PLC_SLOTS];
    	double SNR [PLC_SLOTS] =
    	{
    		0.0
    	};
    	double BPC [PLC_SLOTS] =
    	{
    		0.0
    	};
    	double AvgSNR = 0;
    	double AvgBPC = 0;
    	unsigned carriers = 0;
    	unsigned carrier = 0;
    	unsigned slots = 0;
    	unsigned slot = 0;

    #ifndef __GNUC__
    #pragma pack (push,1)
    #endif

    	struct __packed vs_tone_slot_char_request
    	{
    		struct ethernet_hdr ethernet;
    		struct qualcomm_hdr qualcomm;
    		uint8_t MACADDRESS [ETHER_ADDR_LEN];
    		uint8_t TMSLOT;
    	}
    	* request = (struct vs_tone_slot_char_request *) (message);
    	struct __packed vs_tone_slot_char_confirm
    	{
    		struct ethernet_hdr ethernet;
    		struct qualcomm_hdr qualcomm;
    		uint8_t MSTATUS;
    		uint8_t TMSLOT;
    		uint8_t NUMTMS;
    		uint16_t TMNUMACTCARRIERS;
    		uint8_t MOD_CARRIER [(INT_CARRIERS + 1) >> 1];
    		uint8_t GIL;
    		uint8_t AGC;
    	}
    	* confirm = (struct vs_tone_slot_char_confirm *) (message);

    #ifndef __GNUC__
    #pragma pack (pop)
    #endif

    	memset (message, 0, sizeof (* message));
    	EthernetHeader (&request->ethernet, channel->peer, channel->host, channel->type);
    	QualcommHeader (&request->qualcomm, 0, (VS_RX_TONE_MAP_CHAR | MMTYPE_REQ));
    	plc->packetsize = (ETHER_MIN_LEN - ETHER_CRC_LEN);
    	memcpy (request->MACADDRESS, plc->RDA, sizeof (request->MACADDRESS));
    	request->TMSLOT = 0;
    	if (SendMME (plc) <= 0)
    	{
    		error (PLC_EXIT (plc), errno, CHANNEL_CANTSEND);
    		return (-1);
    	}
    	if (ReadMME (plc, 0, (VS_RX_TONE_MAP_CHAR | MMTYPE_CNF)) <= 0)
    	{
    		error (PLC_EXIT (plc), errno, CHANNEL_CANTREAD);
    		return (-1);
    	}
    	carriers = LE16TOH (confirm->TMNUMACTCARRIERS);
    	slots = confirm->NUMTMS;
    	if (!slots)
    	{
    		error (PLC_EXIT (plc), ECANCELED, "No Tone Maps Available");
    		return (-1);
    	}
    	memset (tonemap, 0, sizeof (tonemap));
    	for (slot = 0; slot < slots; slot++)
    	{
    		EthernetHeader (&request->ethernet, channel->peer, channel->host, channel->type);
    		QualcommHeader (&request->qualcomm, 0, (VS_RX_TONE_MAP_CHAR | MMTYPE_REQ));
    		memcpy (request->MACADDRESS, plc->RDA, sizeof (request->MACADDRESS));
    		request->TMSLOT = slot;
    		plc->packetsize = (ETHER_MIN_LEN - ETHER_CRC_LEN);
    		if (SendMME (plc) <= 0)
    		{
    			error (PLC_EXIT (plc), errno, CHANNEL_CANTSEND);
    			return (-1);
    		}
    		if (ReadMME (plc, 0, (VS_RX_TONE_MAP_CHAR | MMTYPE_CNF)) <= 0)
    		{
    			error (PLC_EXIT (plc), errno, CHANNEL_CANTREAD);
    			return (-1);
    		}
    		if (confirm->MSTATUS)
    		{
    			Failure (plc, PLC_WONTDOIT);
    			return (-1);
    		}
    		memcpy (&tonemap [slot][0], confirm->MOD_CARRIER, sizeof (confirm->MOD_CARRIER));
    		GIL [slot] = confirm->GIL;
    		AGC [slot] = confirm->AGC;
    	}
    	while (carrier < carriers)
    	{
    		unsigned value = 0;
    		unsigned index = carrier >> 1;
    		for (slot = 0; slot < PLC_SLOTS; slot++)
    		{
    			value = tonemap [slot][index];
    			if ((carrier & 1))
    			{
    				value >>= 4;
    			}
    			value &= 0x0F;
    			BPC [slot] += mod2bits [value];
    			SNR [slot] += mod2db [value];
    			AvgBPC += mod2bits [value];
    			AvgSNR += mod2db [value];
    		}
    		carrier++;
    	}
    	AvgBPC /= carriers;
    	AvgBPC /= slots;
    	AvgSNR /= carriers;
    	AvgSNR /= slots;
    	printf (" SNR");
    	for (slot = 0; slot < slots; slot++)
    	{
    		printf (" %8.3f", SNR [slot] / carriers);
    	}
    	printf (" %8.3f", AvgSNR);
    	printf (" \n");
    	printf (" ATN");
    	for (slot = 0; slot < slots; slot++)
    	{
    		printf (" %8.3f", SNR [slot] / carriers - 60);
    	}
    	printf (" %8.3f", AvgSNR - 60);
    	printf (" \n");
    	printf (" BPC");
    	for (slot = 0; slot < slots; slot++)
    	{
    		printf (" %8.3f", BPC [slot] / carriers);
    	}
    	printf (" %8.3f", AvgBPC);
    	printf (" \n");
    	printf (" AGC");
    	for (slot = 0; slot < slots; slot++)
    	{
    		printf (" %02d", AGC [slot]);
    	}
    	printf (" \n");
    	printf (" GIL");
    	for (slot = 0; slot < slots; slot++)
    	{
    		printf (" %02d", GIL [slot]);
    	}
    	printf (" \n");
    	return (0);
    }

    #endif

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