/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* 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.
*
* $FreeBSD$
*/
#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;
}