ar9285_btcoex.c

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/*-
 * SPDX-License-Identifier: ISC
 *
 * Copyright (c) 2002-2005 Sam Leffler, Errno Consulting
 * Copyright (c) 2002-2005 Atheros Communications, Inc.
 * Copyright (c) 2008-2010, Atheros Communications Inc.
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 *
 * $FreeBSD$
 */
 
#include "opt_ah.h"
 
#include "ah.h"
#include "ah_internal.h"
#include "ah_devid.h"
#ifdef AH_DEBUG
#include "ah_desc.h"                /* NB: for HAL_PHYERR* */
#endif
 
#include "ar5416/ar5416.h"
#include "ar5416/ar5416reg.h"
#include "ar5416/ar5416phy.h"
#include "ar5416/ar5416desc.h" /* AR5416_CONTTXMODE */
 
#include "ar9002/ar9285phy.h"
#include "ar9002/ar9285.h"
 
/*
 * This is specific to Kite.
 *
 * Kiwi and others don't have antenna diversity like this.
 */
void
ar9285BTCoexAntennaDiversity(struct ath_hal *ah)
{
        struct ath_hal_5416 *ahp = AH5416(ah);
        u_int32_t regVal;
        u_int8_t ant_div_control1, ant_div_control2;
 
        HALDEBUG(ah, HAL_DEBUG_BT_COEX,
            "%s: btCoexFlag: ALLOW=%d, ENABLE=%d\n",
            __func__,
            !! (ahp->ah_btCoexFlag & HAL_BT_COEX_FLAG_ANT_DIV_ALLOW),
            !! (ahp->ah_btCoexFlag & HAL_BT_COEX_FLAG_ANT_DIV_ENABLE));
 
        if ((ahp->ah_btCoexFlag & HAL_BT_COEX_FLAG_ANT_DIV_ALLOW) ||
            (AH5212(ah)->ah_diversity != HAL_ANT_VARIABLE)) {
        if ((ahp->ah_btCoexFlag & HAL_BT_COEX_FLAG_ANT_DIV_ENABLE) &&
             (AH5212(ah)->ah_antControl == HAL_ANT_VARIABLE)) {
                /* Enable antenna diversity */
                ant_div_control1 = HAL_BT_COEX_ANTDIV_CONTROL1_ENABLE;
                ant_div_control2 = HAL_BT_COEX_ANTDIV_CONTROL2_ENABLE;
 
                /* Don't disable BT ant to allow BB to control SWCOM */
                ahp->ah_btCoexMode2 &= (~(AR_BT_DISABLE_BT_ANT));
                OS_REG_WRITE(ah, AR_BT_COEX_MODE2, ahp->ah_btCoexMode2);
 
                /* Program the correct SWCOM table */
                OS_REG_WRITE(ah, AR_PHY_SWITCH_COM,
                    HAL_BT_COEX_ANT_DIV_SWITCH_COM);
                OS_REG_RMW(ah, AR_PHY_SWITCH_CHAIN_0, 0, 0xf0000000);
        } else if (AH5212(ah)->ah_antControl == HAL_ANT_FIXED_B) {
                /* Disable antenna diversity. Use antenna B(LNA2) only. */
                ant_div_control1 = HAL_BT_COEX_ANTDIV_CONTROL1_FIXED_B;
                ant_div_control2 = HAL_BT_COEX_ANTDIV_CONTROL2_FIXED_B;
 
                /* Disable BT ant to allow concurrent BT and WLAN receive */
                ahp->ah_btCoexMode2 |= AR_BT_DISABLE_BT_ANT;
                OS_REG_WRITE(ah, AR_BT_COEX_MODE2, ahp->ah_btCoexMode2);
 
                /*
                 * Program SWCOM table to make sure RF switch always parks
                 * at WLAN side
                 */
                OS_REG_WRITE(ah, AR_PHY_SWITCH_COM,
                    HAL_BT_COEX_ANT_DIV_SWITCH_COM);
                OS_REG_RMW(ah, AR_PHY_SWITCH_CHAIN_0, 0x60000000, 0xf0000000);
        } else {
                /* Disable antenna diversity. Use antenna A(LNA1) only */
                ant_div_control1 = HAL_BT_COEX_ANTDIV_CONTROL1_FIXED_A;
                ant_div_control2 = HAL_BT_COEX_ANTDIV_CONTROL2_FIXED_A;
 
                /* Disable BT ant to allow concurrent BT and WLAN receive */
                ahp->ah_btCoexMode2 |= AR_BT_DISABLE_BT_ANT;
                OS_REG_WRITE(ah, AR_BT_COEX_MODE2, ahp->ah_btCoexMode2);
 
                /*
                 * Program SWCOM table to make sure RF switch always
                 * parks at BT side
                 */
                OS_REG_WRITE(ah, AR_PHY_SWITCH_COM, 0);
                OS_REG_RMW(ah, AR_PHY_SWITCH_CHAIN_0, 0, 0xf0000000);
        }
 
        regVal = OS_REG_READ(ah, AR_PHY_MULTICHAIN_GAIN_CTL);
        regVal &= (~(AR_PHY_9285_ANT_DIV_CTL_ALL));
        /*
         * Clear ant_fast_div_bias [14:9] since for Janus the main LNA is
         * always LNA1.
         */
        regVal &= (~(AR_PHY_9285_FAST_DIV_BIAS));
 
        regVal |= SM(ant_div_control1, AR_PHY_9285_ANT_DIV_CTL);
        regVal |= SM(ant_div_control2, AR_PHY_9285_ANT_DIV_ALT_LNACONF);
        regVal |= SM((ant_div_control2 >> 2), AR_PHY_9285_ANT_DIV_MAIN_LNACONF);
        regVal |= SM((ant_div_control1 >> 1), AR_PHY_9285_ANT_DIV_ALT_GAINTB);
        regVal |= SM((ant_div_control1 >> 2), AR_PHY_9285_ANT_DIV_MAIN_GAINTB);
        OS_REG_WRITE(ah, AR_PHY_MULTICHAIN_GAIN_CTL, regVal);
 
        regVal = OS_REG_READ(ah, AR_PHY_CCK_DETECT);
        regVal &= (~AR_PHY_CCK_DETECT_BB_ENABLE_ANT_FAST_DIV);
        regVal |= SM((ant_div_control1 >> 3),
            AR_PHY_CCK_DETECT_BB_ENABLE_ANT_FAST_DIV);
        OS_REG_WRITE(ah, AR_PHY_CCK_DETECT, regVal);
    }
}
 
void
ar9285BTCoexSetParameter(struct ath_hal *ah, u_int32_t type, u_int32_t value)
{
        struct ath_hal_5416 *ahp = AH5416(ah);
 
        switch (type) {
        case HAL_BT_COEX_ANTENNA_DIVERSITY:
                if (AR_SREV_KITE(ah)) {
                        ahp->ah_btCoexFlag |= HAL_BT_COEX_FLAG_ANT_DIV_ALLOW;
                        if (value)
                                ahp->ah_btCoexFlag |=
                                    HAL_BT_COEX_FLAG_ANT_DIV_ENABLE;
                        else
                                ahp->ah_btCoexFlag &=
                                    ~HAL_BT_COEX_FLAG_ANT_DIV_ENABLE;
                        ar9285BTCoexAntennaDiversity(ah);
                }
                break;
        default:
                ar5416BTCoexSetParameter(ah, type, value);
                break;
        }
}