/*- * SPDX-License-Identifier: BSD-2-Clause * * Copyright (c) 2008-2010 Atheros Communications Inc. * Copyright (c) 2011 Adrian Chadd, Xenion Pty Ltd. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. 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. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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. */ #include "opt_ah.h" #include "ah.h" #include "ah_desc.h" #include "ah_internal.h" #include "ah_eeprom_v4k.h" #include "ar9002/ar9280.h" #include "ar9002/ar9285.h" #include "ar5416/ar5416reg.h" #include "ar5416/ar5416phy.h" #include "ar9002/ar9285phy.h" #include "ar9002/ar9285_phy.h" #include "ar9002/ar9285_diversity.h" /* * Set the antenna switch to control RX antenna diversity. * * If a fixed configuration is used, the LNA and div bias * settings are fixed and the antenna diversity scanning routine * is disabled. * * If a variable configuration is used, a default is programmed * in and sampling commences per RXed packet. * * Since this is called from ar9285SetBoardValues() to setup * diversity, it means that after a reset or scan, any current * software diversity combining settings will be lost and won't * re-appear until after the first successful sample run. * Please keep this in mind if you're seeing weird performance * that happens to relate to scan/diversity timing. */ HAL_BOOL ar9285SetAntennaSwitch(struct ath_hal *ah, HAL_ANT_SETTING settings) { int regVal; const HAL_EEPROM_v4k *ee = AH_PRIVATE(ah)->ah_eeprom; const MODAL_EEP4K_HEADER *pModal = &ee->ee_base.modalHeader; uint8_t ant_div_control1, ant_div_control2; if (pModal->version < 3) { HALDEBUG(ah, HAL_DEBUG_DIVERSITY, "%s: not supported\n", __func__); return AH_FALSE; /* Can't do diversity */ } /* Store settings */ AH5212(ah)->ah_antControl = settings; AH5212(ah)->ah_diversity = (settings == HAL_ANT_VARIABLE); /* XXX don't fiddle if the PHY is in sleep mode or ! chan */ /* Begin setting the relevant registers */ ant_div_control1 = pModal->antdiv_ctl1; ant_div_control2 = pModal->antdiv_ctl2; regVal = OS_REG_READ(ah, AR_PHY_MULTICHAIN_GAIN_CTL); regVal &= (~(AR_PHY_9285_ANT_DIV_CTL_ALL)); /* enable antenna diversity only if diversityControl == HAL_ANT_VARIABLE */ if (settings == HAL_ANT_VARIABLE) regVal |= SM(ant_div_control1, AR_PHY_9285_ANT_DIV_CTL); if (settings == HAL_ANT_VARIABLE) { HALDEBUG(ah, HAL_DEBUG_DIVERSITY, "%s: HAL_ANT_VARIABLE\n", __func__); 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); } else { if (settings == HAL_ANT_FIXED_A) { /* Diversity disabled, RX = LNA1 */ HALDEBUG(ah, HAL_DEBUG_DIVERSITY, "%s: HAL_ANT_FIXED_A\n", __func__); regVal |= SM(HAL_ANT_DIV_COMB_LNA2, AR_PHY_9285_ANT_DIV_ALT_LNACONF); regVal |= SM(HAL_ANT_DIV_COMB_LNA1, AR_PHY_9285_ANT_DIV_MAIN_LNACONF); regVal |= SM(AR_PHY_9285_ANT_DIV_GAINTB_0, AR_PHY_9285_ANT_DIV_ALT_GAINTB); regVal |= SM(AR_PHY_9285_ANT_DIV_GAINTB_1, AR_PHY_9285_ANT_DIV_MAIN_GAINTB); } else if (settings == HAL_ANT_FIXED_B) { /* Diversity disabled, RX = LNA2 */ HALDEBUG(ah, HAL_DEBUG_DIVERSITY, "%s: HAL_ANT_FIXED_B\n", __func__); regVal |= SM(HAL_ANT_DIV_COMB_LNA1, AR_PHY_9285_ANT_DIV_ALT_LNACONF); regVal |= SM(HAL_ANT_DIV_COMB_LNA2, AR_PHY_9285_ANT_DIV_MAIN_LNACONF); regVal |= SM(AR_PHY_9285_ANT_DIV_GAINTB_1, AR_PHY_9285_ANT_DIV_ALT_GAINTB); regVal |= SM(AR_PHY_9285_ANT_DIV_GAINTB_0, AR_PHY_9285_ANT_DIV_MAIN_GAINTB); } } OS_REG_WRITE(ah, AR_PHY_MULTICHAIN_GAIN_CTL, regVal); regVal = OS_REG_READ(ah, AR_PHY_MULTICHAIN_GAIN_CTL); regVal = OS_REG_READ(ah, AR_PHY_CCK_DETECT); regVal &= (~AR_PHY_CCK_DETECT_BB_ENABLE_ANT_FAST_DIV); if (settings == HAL_ANT_VARIABLE) regVal |= SM((ant_div_control1 >> 3), AR_PHY_CCK_DETECT_BB_ENABLE_ANT_FAST_DIV); OS_REG_WRITE(ah, AR_PHY_CCK_DETECT, regVal); regVal = OS_REG_READ(ah, AR_PHY_CCK_DETECT); /* * If Diversity combining is available and the diversity setting * is to allow variable diversity, enable it by default. * * This will be eventually overridden by the software antenna * diversity logic. * * Note that yes, this following section overrides the above * settings for the LNA configuration and fast-bias. */ if (ar9285_check_div_comb(ah) && AH5212(ah)->ah_diversity == AH_TRUE) { // If support DivComb, set MAIN to LNA1 and ALT to LNA2 at the first beginning HALDEBUG(ah, HAL_DEBUG_DIVERSITY, "%s: Enable initial settings for combined diversity\n", __func__); regVal = OS_REG_READ(ah, AR_PHY_MULTICHAIN_GAIN_CTL); regVal &= (~(AR_PHY_9285_ANT_DIV_MAIN_LNACONF | AR_PHY_9285_ANT_DIV_ALT_LNACONF)); regVal |= (HAL_ANT_DIV_COMB_LNA1 << AR_PHY_9285_ANT_DIV_MAIN_LNACONF_S); regVal |= (HAL_ANT_DIV_COMB_LNA2 << AR_PHY_9285_ANT_DIV_ALT_LNACONF_S); regVal &= (~(AR_PHY_9285_FAST_DIV_BIAS)); regVal |= (0 << AR_PHY_9285_FAST_DIV_BIAS_S); OS_REG_WRITE(ah, AR_PHY_MULTICHAIN_GAIN_CTL, regVal); } return AH_TRUE; }