Contributors: 5
Author Tokens Token Proportion Commits Commit Proportion
Phillip Potter 1843 95.39% 1 6.67%
Michael Straube 64 3.31% 10 66.67%
Martin Kaiser 13 0.67% 1 6.67%
Larry Finger 10 0.52% 2 13.33%
Haowen Bai 2 0.10% 1 6.67%
Total 1932 15 


// SPDX-License-Identifier: GPL-2.0
/* Copyright(c) 2007 - 2011 Realtek Corporation. */

#include "../include/drv_types.h"

static u8 odm_query_rxpwrpercentage(s8 antpower)
{
	if ((antpower <= -100) || (antpower >= 20))
		return 0;
	else if (antpower >= 0)
		return 100;
	else
		return 100 + antpower;
}

static s32 odm_signal_scale_mapping(struct odm_dm_struct *dm_odm, s32 currsig)
{
	s32 retsig;

	if (currsig >= 51 && currsig <= 100)
		retsig = 100;
	else if (currsig >= 41 && currsig <= 50)
		retsig = 80 + ((currsig - 40) * 2);
	else if (currsig >= 31 && currsig <= 40)
		retsig = 66 + (currsig - 30);
	else if (currsig >= 21 && currsig <= 30)
		retsig = 54 + (currsig - 20);
	else if (currsig >= 10 && currsig <= 20)
		retsig = 42 + (((currsig - 10) * 2) / 3);
	else if (currsig >= 5 && currsig <= 9)
		retsig = 22 + (((currsig - 5) * 3) / 2);
	else if (currsig >= 1 && currsig <= 4)
		retsig = 6 + (((currsig - 1) * 3) / 2);
	else
		retsig = currsig;

	return retsig;
}

static u8 odm_evm_db_to_percentage(s8 value)
{
	/*  -33dB~0dB to 0%~99% */
	s8 ret_val = clamp(-value, 0, 33) * 3;

	if (ret_val == 99)
		ret_val = 100;

	return ret_val;
}

static void odm_RxPhyStatus92CSeries_Parsing(struct odm_dm_struct *dm_odm,
			struct phy_info *pPhyInfo,
			u8 *pPhyStatus,
			struct odm_per_pkt_info *pPktinfo,
			struct adapter *adapt)
{
	u8 i, Max_spatial_stream;
	s8 rx_pwr[4], rx_pwr_all = 0;
	u8 EVM, PWDB_ALL = 0;
	u8 RSSI, total_rssi = 0;
	u8 isCCKrate = 0;
	u8 rf_rx_num = 0;
	u8 cck_highpwr = 0;
	u8 LNA_idx, VGA_idx;

	struct phy_status_rpt *pPhyStaRpt = (struct phy_status_rpt *)pPhyStatus;

	isCCKrate = pPktinfo->Rate >= DESC92C_RATE1M && pPktinfo->Rate <= DESC92C_RATE11M;

	if (isCCKrate) {
		u8 cck_agc_rpt;

		/*  (1)Hardware does not provide RSSI for CCK */
		/*  (2)PWDB, Average PWDB calculated by hardware (for rate adaptive) */

		cck_highpwr = dm_odm->bCckHighPower;

		cck_agc_rpt =  pPhyStaRpt->cck_agc_rpt_ofdm_cfosho_a;

		/* 2011.11.28 LukeLee: 88E use different LNA & VGA gain table */
		/* The RSSI formula should be modified according to the gain table */
		/* In 88E, cck_highpwr is always set to 1 */
		LNA_idx = ((cck_agc_rpt & 0xE0) >> 5);
		VGA_idx = (cck_agc_rpt & 0x1F);
		switch (LNA_idx) {
		case 7:
			if (VGA_idx <= 27)
				rx_pwr_all = -100 + 2 * (27 - VGA_idx); /* VGA_idx = 27~2 */
			else
				rx_pwr_all = -100;
			break;
		case 6:
			rx_pwr_all = -48 + 2 * (2 - VGA_idx); /* VGA_idx = 2~0 */
			break;
		case 5:
			rx_pwr_all = -42 + 2 * (7 - VGA_idx); /* VGA_idx = 7~5 */
			break;
		case 4:
			rx_pwr_all = -36 + 2 * (7 - VGA_idx); /* VGA_idx = 7~4 */
			break;
		case 3:
			rx_pwr_all = -24 + 2 * (7 - VGA_idx); /* VGA_idx = 7~0 */
			break;
		case 2:
			if (cck_highpwr)
				rx_pwr_all = -12 + 2 * (5 - VGA_idx); /* VGA_idx = 5~0 */
			else
				rx_pwr_all = -6 + 2 * (5 - VGA_idx);
			break;
		case 1:
				rx_pwr_all = 8 - 2 * VGA_idx;
			break;
		case 0:
				rx_pwr_all = 14 - 2 * VGA_idx;
			break;
		default:
			break;
		}
		rx_pwr_all += 6;
		PWDB_ALL = odm_query_rxpwrpercentage(rx_pwr_all);
		if (!cck_highpwr) {
			if (PWDB_ALL >= 80)
				PWDB_ALL = ((PWDB_ALL - 80) << 1) + ((PWDB_ALL - 80) >> 1) + 80;
			else if ((PWDB_ALL <= 78) && (PWDB_ALL >= 20))
				PWDB_ALL += 3;
			if (PWDB_ALL > 100)
				PWDB_ALL = 100;
		}

		pPhyInfo->RxPWDBAll = PWDB_ALL;
		pPhyInfo->recvpower = rx_pwr_all;
		/*  (3) Get Signal Quality (EVM) */
		if (pPktinfo->bPacketMatchBSSID) {
			u8 SQ, SQ_rpt;

			if (pPhyInfo->RxPWDBAll > 40) {
				SQ = 100;
			} else {
				SQ_rpt = pPhyStaRpt->cck_sig_qual_ofdm_pwdb_all;

				if (SQ_rpt > 64)
					SQ = 0;
				else if (SQ_rpt < 20)
					SQ = 100;
				else
					SQ = ((64 - SQ_rpt) * 100) / 44;
			}
			pPhyInfo->SignalQuality = SQ;
		}
	} else { /* is OFDM rate */
		/*  (1)Get RSSI for HT rate */

		for (i = RF_PATH_A; i < RF_PATH_MAX; i++) {
			/*  2008/01/30 MH we will judge RF RX path now. */
			if (dm_odm->RFPathRxEnable & BIT(i))
				rf_rx_num++;

			rx_pwr[i] = ((pPhyStaRpt->path_agc[i].gain & 0x3F) * 2) - 110;
			if (i == RF_PATH_A)
				adapt->signal_strength = rx_pwr[i];

			pPhyInfo->RxPwr[i] = rx_pwr[i];

			/* Translate DBM to percentage. */
			RSSI = odm_query_rxpwrpercentage(rx_pwr[i]);
			total_rssi += RSSI;

			pPhyInfo->RxMIMOSignalStrength[i] = (u8)RSSI;

			/* Get Rx snr value in DB */
			dm_odm->PhyDbgInfo.RxSNRdB[i] = (s32)(pPhyStaRpt->path_rxsnr[i] / 2);
		}
		/*  (2)PWDB, Average PWDB calculated by hardware (for rate adaptive) */
		rx_pwr_all = (((pPhyStaRpt->cck_sig_qual_ofdm_pwdb_all) >> 1) & 0x7f) - 110;

		PWDB_ALL = odm_query_rxpwrpercentage(rx_pwr_all);

		pPhyInfo->RxPWDBAll = PWDB_ALL;
		pPhyInfo->RxPower = rx_pwr_all;
		pPhyInfo->recvpower = rx_pwr_all;

		/*  (3)EVM of HT rate */
		if (pPktinfo->Rate >= DESC92C_RATEMCS8 && pPktinfo->Rate <= DESC92C_RATEMCS15)
			Max_spatial_stream = 2; /* both spatial stream make sense */
		else
			Max_spatial_stream = 1; /* only spatial stream 1 makes sense */

		for (i = 0; i < Max_spatial_stream; i++) {
			/*  Do not use shift operation like "rx_evmX >>= 1" because the compilor of free build environment */
			/*  fill most significant bit to "zero" when doing shifting operation which may change a negative */
			/*  value to positive one, then the dbm value (which is supposed to be negative)  is not correct anymore. */
			EVM = odm_evm_db_to_percentage((pPhyStaRpt->stream_rxevm[i]));	/* dbm */

			if (pPktinfo->bPacketMatchBSSID) {
				if (i == RF_PATH_A) /*  Fill value in RFD, Get the first spatial stream only */
					pPhyInfo->SignalQuality = (u8)(EVM & 0xff);
			}
		}
	}
	/* UI BSS List signal strength(in percentage), make it good looking, from 0~100. */
	/* It is assigned to the BSS List in GetValueFromBeaconOrProbeRsp(). */
	if (isCCKrate) {
		pPhyInfo->SignalStrength = (u8)(odm_signal_scale_mapping(dm_odm, PWDB_ALL));/* PWDB_ALL; */
	} else {
		if (rf_rx_num != 0)
			pPhyInfo->SignalStrength = (u8)(odm_signal_scale_mapping(dm_odm, total_rssi /= rf_rx_num));
	}

	/* For 88E HW Antenna Diversity */
	dm_odm->DM_FatTable.antsel_rx_keep_0 = pPhyStaRpt->ant_sel;
	dm_odm->DM_FatTable.antsel_rx_keep_1 = pPhyStaRpt->ant_sel_b;
	dm_odm->DM_FatTable.antsel_rx_keep_2 = pPhyStaRpt->antsel_rx_keep_2;
}

static void odm_Process_RSSIForDM(struct odm_dm_struct *dm_odm,
				  struct phy_info *pPhyInfo,
				  struct odm_per_pkt_info *pPktinfo)
{
	s32 UndecoratedSmoothedPWDB, UndecoratedSmoothedCCK;
	s32 UndecoratedSmoothedOFDM, RSSI_Ave;
	u8 isCCKrate = 0;
	u8 RSSI_max, RSSI_min, i;
	u32 OFDM_pkt = 0;
	u32 Weighting = 0;
	struct sta_info *pEntry;
	u8 antsel_tr_mux;
	struct fast_ant_train *pDM_FatTable = &dm_odm->DM_FatTable;

	if (pPktinfo->StationID == 0xFF)
		return;
	pEntry = dm_odm->pODM_StaInfo[pPktinfo->StationID];
	if (!IS_STA_VALID(pEntry))
		return;
	if ((!pPktinfo->bPacketMatchBSSID))
		return;

	isCCKrate = pPktinfo->Rate >= DESC92C_RATE1M && pPktinfo->Rate <= DESC92C_RATE11M;

	/* Smart Antenna Debug Message------------------  */
	if ((dm_odm->AntDivType == CG_TRX_HW_ANTDIV) || (dm_odm->AntDivType == CGCS_RX_HW_ANTDIV)) {
		if (pPktinfo->bPacketToSelf || pPktinfo->bPacketBeacon) {
			antsel_tr_mux = (pDM_FatTable->antsel_rx_keep_2 << 2) |
					(pDM_FatTable->antsel_rx_keep_1 << 1) | pDM_FatTable->antsel_rx_keep_0;
			ODM_AntselStatistics_88E(dm_odm, antsel_tr_mux, pPktinfo->StationID, pPhyInfo->RxPWDBAll);
		}
	}

	/* Smart Antenna Debug Message------------------ */

	UndecoratedSmoothedCCK =  pEntry->rssi_stat.UndecoratedSmoothedCCK;
	UndecoratedSmoothedOFDM = pEntry->rssi_stat.UndecoratedSmoothedOFDM;
	UndecoratedSmoothedPWDB = pEntry->rssi_stat.UndecoratedSmoothedPWDB;

	if (pPktinfo->bPacketToSelf || pPktinfo->bPacketBeacon) {
		if (!isCCKrate) { /* ofdm rate */
			if (pPhyInfo->RxMIMOSignalStrength[RF_PATH_B] == 0) {
				RSSI_Ave = pPhyInfo->RxMIMOSignalStrength[RF_PATH_A];
			} else {
				if (pPhyInfo->RxMIMOSignalStrength[RF_PATH_A] > pPhyInfo->RxMIMOSignalStrength[RF_PATH_B]) {
					RSSI_max = pPhyInfo->RxMIMOSignalStrength[RF_PATH_A];
					RSSI_min = pPhyInfo->RxMIMOSignalStrength[RF_PATH_B];
				} else {
					RSSI_max = pPhyInfo->RxMIMOSignalStrength[RF_PATH_B];
					RSSI_min = pPhyInfo->RxMIMOSignalStrength[RF_PATH_A];
				}
				if ((RSSI_max - RSSI_min) < 3)
					RSSI_Ave = RSSI_max;
				else if ((RSSI_max - RSSI_min) < 6)
					RSSI_Ave = RSSI_max - 1;
				else if ((RSSI_max - RSSI_min) < 10)
					RSSI_Ave = RSSI_max - 2;
				else
					RSSI_Ave = RSSI_max - 3;
			}

			/* 1 Process OFDM RSSI */
			if (UndecoratedSmoothedOFDM <= 0) {	/*  initialize */
				UndecoratedSmoothedOFDM = pPhyInfo->RxPWDBAll;
			} else {
				if (pPhyInfo->RxPWDBAll > (u32)UndecoratedSmoothedOFDM) {
					UndecoratedSmoothedOFDM =
							(((UndecoratedSmoothedOFDM) * (Rx_Smooth_Factor - 1)) +
							(RSSI_Ave)) / (Rx_Smooth_Factor);
					UndecoratedSmoothedOFDM = UndecoratedSmoothedOFDM + 1;
				} else {
					UndecoratedSmoothedOFDM =
							(((UndecoratedSmoothedOFDM) * (Rx_Smooth_Factor - 1)) +
							(RSSI_Ave)) / (Rx_Smooth_Factor);
				}
			}

			pEntry->rssi_stat.PacketMap = (pEntry->rssi_stat.PacketMap << 1) | BIT(0);

		} else {
			RSSI_Ave = pPhyInfo->RxPWDBAll;

			/* 1 Process CCK RSSI */
			if (UndecoratedSmoothedCCK <= 0) {	/*  initialize */
				UndecoratedSmoothedCCK = pPhyInfo->RxPWDBAll;
			} else {
				if (pPhyInfo->RxPWDBAll > (u32)UndecoratedSmoothedCCK) {
					UndecoratedSmoothedCCK =
							((UndecoratedSmoothedCCK * (Rx_Smooth_Factor - 1)) +
							pPhyInfo->RxPWDBAll) / Rx_Smooth_Factor;
					UndecoratedSmoothedCCK = UndecoratedSmoothedCCK + 1;
				} else {
					UndecoratedSmoothedCCK =
							((UndecoratedSmoothedCCK * (Rx_Smooth_Factor - 1)) +
							pPhyInfo->RxPWDBAll) / Rx_Smooth_Factor;
				}
			}
			pEntry->rssi_stat.PacketMap = pEntry->rssi_stat.PacketMap << 1;
		}
		/* 2011.07.28 LukeLee: modified to prevent unstable CCK RSSI */
		if (pEntry->rssi_stat.ValidBit >= 64)
			pEntry->rssi_stat.ValidBit = 64;
		else
			pEntry->rssi_stat.ValidBit++;

		for (i = 0; i < pEntry->rssi_stat.ValidBit; i++)
			OFDM_pkt += (u8)(pEntry->rssi_stat.PacketMap >> i) & BIT(0);

		if (pEntry->rssi_stat.ValidBit == 64) {
			Weighting = ((OFDM_pkt << 4) > 64) ? 64 : (OFDM_pkt << 4);
			UndecoratedSmoothedPWDB = (Weighting * UndecoratedSmoothedOFDM + (64 - Weighting) * UndecoratedSmoothedCCK) >> 6;
		} else {
			if (pEntry->rssi_stat.ValidBit != 0)
				UndecoratedSmoothedPWDB = (OFDM_pkt * UndecoratedSmoothedOFDM +
							  (pEntry->rssi_stat.ValidBit - OFDM_pkt) *
							  UndecoratedSmoothedCCK) / pEntry->rssi_stat.ValidBit;
			else
				UndecoratedSmoothedPWDB = 0;
		}
		pEntry->rssi_stat.UndecoratedSmoothedCCK = UndecoratedSmoothedCCK;
		pEntry->rssi_stat.UndecoratedSmoothedOFDM = UndecoratedSmoothedOFDM;
		pEntry->rssi_stat.UndecoratedSmoothedPWDB = UndecoratedSmoothedPWDB;
	}
}

/*  Endianness before calling this API */
void ODM_PhyStatusQuery(struct odm_dm_struct *dm_odm,
			struct phy_info *pPhyInfo,
			u8 *pPhyStatus,
			struct odm_per_pkt_info *pPktinfo,
			struct adapter *adapt)
{
	odm_RxPhyStatus92CSeries_Parsing(dm_odm, pPhyInfo, pPhyStatus, pPktinfo, adapt);
	odm_Process_RSSIForDM(dm_odm, pPhyInfo, pPktinfo);
}