/*-
 * 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.
 */

#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 "ar5416/ar5416_btcoex.h"

void
ar5416SetBTCoexInfo(struct ath_hal *ah, HAL_BT_COEX_INFO *btinfo)
{
        struct ath_hal_5416 *ahp = AH5416(ah);

        ahp->ah_btModule = btinfo->bt_module;
        ahp->ah_btCoexConfigType = btinfo->bt_coex_config;
        ahp->ah_btActiveGpioSelect = btinfo->bt_gpio_bt_active;
        ahp->ah_btPriorityGpioSelect = btinfo->bt_gpio_bt_priority;
        ahp->ah_wlanActiveGpioSelect = btinfo->bt_gpio_wlan_active;
        ahp->ah_btActivePolarity = btinfo->bt_active_polarity;
        ahp->ah_btCoexSingleAnt = btinfo->bt_single_ant;
        ahp->ah_btWlanIsolation = btinfo->bt_isolation;
}

void
ar5416BTCoexConfig(struct ath_hal *ah, HAL_BT_COEX_CONFIG *btconf)
{
        struct ath_hal_5416 *ahp = AH5416(ah);
        HAL_BOOL rxClearPolarity = btconf->bt_rxclear_polarity;

        /*
         * For Kiwi and Osprey, the polarity of rx_clear is active high.
         * The bt_rxclear_polarity flag from ath(4) needs to be inverted.
         */
        if (AR_SREV_KIWI(ah)) {
                rxClearPolarity = !btconf->bt_rxclear_polarity;
        }

        ahp->ah_btCoexMode = (ahp->ah_btCoexMode & AR_BT_QCU_THRESH) |
            SM(btconf->bt_time_extend, AR_BT_TIME_EXTEND) |
            SM(btconf->bt_txstate_extend, AR_BT_TXSTATE_EXTEND) |
            SM(btconf->bt_txframe_extend, AR_BT_TX_FRAME_EXTEND) |
            SM(btconf->bt_mode, AR_BT_MODE) |
            SM(btconf->bt_quiet_collision, AR_BT_QUIET) |
            SM(rxClearPolarity, AR_BT_RX_CLEAR_POLARITY) |
            SM(btconf->bt_priority_time, AR_BT_PRIORITY_TIME) |
            SM(btconf->bt_first_slot_time, AR_BT_FIRST_SLOT_TIME);

        ahp->ah_btCoexMode2 |= SM(btconf->bt_hold_rxclear,
            AR_BT_HOLD_RX_CLEAR);

        if (ahp->ah_btCoexSingleAnt == AH_FALSE) {
                /* Enable ACK to go out even though BT has higher priority. */
                ahp->ah_btCoexMode2 |= AR_BT_DISABLE_BT_ANT;
        }
}

void
ar5416BTCoexSetQcuThresh(struct ath_hal *ah, int qnum)
{
        struct ath_hal_5416 *ahp = AH5416(ah);

        ahp->ah_btCoexMode |= SM(qnum, AR_BT_QCU_THRESH);
}

void
ar5416BTCoexSetWeights(struct ath_hal *ah, u_int32_t stompType)
{
        struct ath_hal_5416 *ahp = AH5416(ah);

        if (AR_SREV_KIWI_10_OR_LATER(ah)) {
                /* TODO: TX RX separate is not enabled. */
                switch (stompType) {
                case HAL_BT_COEX_STOMP_AUDIO:
                        /* XXX TODO */
                case HAL_BT_COEX_STOMP_ALL:
                        ahp->ah_btCoexBTWeight = AR5416_BT_WGHT;
                        ahp->ah_btCoexWLANWeight = AR5416_STOMP_ALL_WLAN_WGHT;
                        break;
                case HAL_BT_COEX_STOMP_LOW:
                        ahp->ah_btCoexBTWeight = AR5416_BT_WGHT;
                        ahp->ah_btCoexWLANWeight = AR5416_STOMP_LOW_WLAN_WGHT;
                        break;
                case HAL_BT_COEX_STOMP_ALL_FORCE:
                        ahp->ah_btCoexBTWeight = AR5416_BT_WGHT;
                        ahp->ah_btCoexWLANWeight =
                            AR5416_STOMP_ALL_FORCE_WLAN_WGHT;
                        break;
                case HAL_BT_COEX_STOMP_LOW_FORCE:
                        ahp->ah_btCoexBTWeight = AR5416_BT_WGHT;
                        ahp->ah_btCoexWLANWeight =
                            AR5416_STOMP_LOW_FORCE_WLAN_WGHT;
                        break;
                case HAL_BT_COEX_STOMP_NONE:
                case HAL_BT_COEX_NO_STOMP:
                        ahp->ah_btCoexBTWeight = AR5416_BT_WGHT;
                        ahp->ah_btCoexWLANWeight = AR5416_STOMP_NONE_WLAN_WGHT;
                        break;
                default:
                        /* There is a forceWeight from registry */
                        ahp->ah_btCoexBTWeight = stompType & 0xffff;
                        ahp->ah_btCoexWLANWeight = stompType >> 16;
                        break;
                }
        } else {
                switch (stompType) {
                case HAL_BT_COEX_STOMP_AUDIO:
                        /* XXX TODO */
                case HAL_BT_COEX_STOMP_ALL:
                        ahp->ah_btCoexBTWeight = AR5416_BT_WGHT;
                        ahp->ah_btCoexWLANWeight = AR5416_STOMP_ALL_WLAN_WGHT;
                        break;
                case HAL_BT_COEX_STOMP_LOW:
                        ahp->ah_btCoexBTWeight = AR5416_BT_WGHT;
                        ahp->ah_btCoexWLANWeight = AR5416_STOMP_LOW_WLAN_WGHT;
                        break;
                case HAL_BT_COEX_STOMP_ALL_FORCE:
                        ahp->ah_btCoexBTWeight = AR5416_BT_WGHT;
                        ahp->ah_btCoexWLANWeight =
                            AR5416_STOMP_ALL_FORCE_WLAN_WGHT;
                        break;
                case HAL_BT_COEX_STOMP_LOW_FORCE:
                        ahp->ah_btCoexBTWeight = AR5416_BT_WGHT;
                        ahp->ah_btCoexWLANWeight =
                            AR5416_STOMP_LOW_FORCE_WLAN_WGHT;
                        break;
                case HAL_BT_COEX_STOMP_NONE:
                case HAL_BT_COEX_NO_STOMP:
                        ahp->ah_btCoexBTWeight = AR5416_BT_WGHT;
                        ahp->ah_btCoexWLANWeight = AR5416_STOMP_NONE_WLAN_WGHT;
                        break;
                default:
                        /* There is a forceWeight from registry */
                        ahp->ah_btCoexBTWeight = stompType & 0xffff;
                        ahp->ah_btCoexWLANWeight = stompType >> 16;
                        break;
                }
        }
}

void
ar5416BTCoexSetupBmissThresh(struct ath_hal *ah, u_int32_t thresh)
{
        struct ath_hal_5416 *ahp = AH5416(ah);

        ahp->ah_btCoexMode2 |= SM(thresh, AR_BT_BCN_MISS_THRESH);
}

/*
 * There is no antenna diversity for Owl, Kiwi, etc.
 *
 * Kite will override this particular method.
 */
void
ar5416BTCoexAntennaDiversity(struct ath_hal *ah)
{
}

void
ar5416BTCoexSetParameter(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_SET_ACK_PWR:
                if (value) {
                        ahp->ah_btCoexFlag |= HAL_BT_COEX_FLAG_LOW_ACK_PWR;
                        OS_REG_WRITE(ah, AR_TPC, HAL_BT_COEX_LOW_ACK_POWER);
                } else {
                        ahp->ah_btCoexFlag &= ~HAL_BT_COEX_FLAG_LOW_ACK_PWR;
                        OS_REG_WRITE(ah, AR_TPC, HAL_BT_COEX_HIGH_ACK_POWER);
                }
                break;
        case HAL_BT_COEX_ANTENNA_DIVERSITY:
                /* This is overridden for Kite */
                break;
#if 0
        case HAL_BT_COEX_LOWER_TX_PWR:
            if (value) {
                if ((ahp->ah_btCoexFlag & HAL_BT_COEX_FLAG_LOWER_TX_PWR) == 0) {
                    ahp->ah_btCoexFlag |= HAL_BT_COEX_FLAG_LOWER_TX_PWR;
                    AH_PRIVATE(ah)->ah_config.ath_hal_desc_tpc = 1;
                    ar5416SetTxPowerLimit(ah, AH_PRIVATE(ah)->ah_power_limit, AH_PRIVATE(ah)->ah_extra_txpow, 0);
                }
            }
            else {
                if (ahp->ah_btCoexFlag & HAL_BT_COEX_FLAG_LOWER_TX_PWR) {
                    ahp->ah_btCoexFlag &= ~HAL_BT_COEX_FLAG_LOWER_TX_PWR;
                    AH_PRIVATE(ah)->ah_config.ath_hal_desc_tpc = 0;
                    ar5416SetTxPowerLimit(ah, AH_PRIVATE(ah)->ah_power_limit, AH_PRIVATE(ah)->ah_extra_txpow, 0);
                }
            }
            break;
#endif
        default:
                        break;
        }
}

void
ar5416BTCoexDisable(struct ath_hal *ah)
{
        struct ath_hal_5416 *ahp = AH5416(ah);

        /* Always drive rx_clear_external output as 0 */
        ar5416GpioSet(ah, ahp->ah_wlanActiveGpioSelect, 0);
        ar5416GpioCfgOutput(ah, ahp->ah_wlanActiveGpioSelect,
            HAL_GPIO_OUTPUT_MUX_AS_OUTPUT);

        if (AR_SREV_9271(ah)) {
                /*
                 * Set wlanActiveGpio to input when disabling BT-COEX to
                 * reduce power consumption
                 */
                ar5416GpioCfgInput(ah, ahp->ah_wlanActiveGpioSelect);
        }

        if (ahp->ah_btCoexSingleAnt == AH_TRUE) {
                OS_REG_RMW_FIELD(ah, AR_QUIET1, AR_QUIET1_QUIET_ACK_CTS_ENABLE,
                    1);
                OS_REG_RMW_FIELD(ah, AR_MISC_MODE, AR_PCU_BT_ANT_PREVENT_RX,
                    0);
        }

        OS_REG_WRITE(ah, AR_BT_COEX_MODE, AR_BT_QUIET | AR_BT_MODE);
        OS_REG_WRITE(ah, AR_BT_COEX_WEIGHT, 0);
        if (AR_SREV_KIWI_10_OR_LATER(ah))
                OS_REG_WRITE(ah, AR_BT_COEX_WEIGHT2, 0);
        OS_REG_WRITE(ah, AR_BT_COEX_MODE2, 0);

        ahp->ah_btCoexEnabled = AH_FALSE;
}

int
ar5416BTCoexEnable(struct ath_hal *ah)
{
        struct ath_hal_5416 *ahp = AH5416(ah);

        /* Program coex mode and weight registers to actually enable coex */
        OS_REG_WRITE(ah, AR_BT_COEX_MODE, ahp->ah_btCoexMode);
        OS_REG_WRITE(ah, AR_BT_COEX_WEIGHT,
            SM(ahp->ah_btCoexWLANWeight & 0xFFFF, AR_BT_WL_WGHT) |
            SM(ahp->ah_btCoexBTWeight & 0xFFFF, AR_BT_BT_WGHT));
        if (AR_SREV_KIWI_10_OR_LATER(ah)) {
        OS_REG_WRITE(ah, AR_BT_COEX_WEIGHT2,
            SM(ahp->ah_btCoexWLANWeight >> 16, AR_BT_WL_WGHT));
        }
        OS_REG_WRITE(ah, AR_BT_COEX_MODE2, ahp->ah_btCoexMode2);

        /* Added Select GPIO5~8 instaed SPI */
        if (AR_SREV_9271(ah)) {
                uint32_t val;

                val = OS_REG_READ(ah, AR9271_CLOCK_CONTROL);
                val &= 0xFFFFFEFF;
                OS_REG_WRITE(ah, AR9271_CLOCK_CONTROL, val);
        }

        if (ahp->ah_btCoexFlag & HAL_BT_COEX_FLAG_LOW_ACK_PWR)
                OS_REG_WRITE(ah, AR_TPC, HAL_BT_COEX_LOW_ACK_POWER);
        else
                OS_REG_WRITE(ah, AR_TPC, HAL_BT_COEX_HIGH_ACK_POWER);

        if (ahp->ah_btCoexSingleAnt == AH_TRUE) {
                OS_REG_RMW_FIELD(ah, AR_QUIET1,
                    AR_QUIET1_QUIET_ACK_CTS_ENABLE, 1);
                /* XXX should update miscMode? */
                OS_REG_RMW_FIELD(ah, AR_MISC_MODE,
                    AR_PCU_BT_ANT_PREVENT_RX, 1);
        } else {
                OS_REG_RMW_FIELD(ah, AR_QUIET1,
                    AR_QUIET1_QUIET_ACK_CTS_ENABLE, 1);
                /* XXX should update miscMode? */
                OS_REG_RMW_FIELD(ah, AR_MISC_MODE,
                    AR_PCU_BT_ANT_PREVENT_RX, 0);
        }

        if (ahp->ah_btCoexConfigType == HAL_BT_COEX_CFG_3WIRE) {
                /* For 3-wire, configure the desired GPIO port for rx_clear */
                ar5416GpioCfgOutput(ah, ahp->ah_wlanActiveGpioSelect,
                    HAL_GPIO_OUTPUT_MUX_AS_WLAN_ACTIVE);
        } else {
                /*
                 * For 2-wire, configure the desired GPIO port
                 * for TX_FRAME output
                 */
                ar5416GpioCfgOutput(ah, ahp->ah_wlanActiveGpioSelect,
                    HAL_GPIO_OUTPUT_MUX_AS_TX_FRAME);
        }

        /*
         * Enable a weak pull down on BT_ACTIVE.
         * When BT device is disabled, BT_ACTIVE might be floating.
         */
        OS_REG_RMW(ah, AR_GPIO_PDPU,
            (0x2 << (ahp->ah_btActiveGpioSelect * 2)),
            (0x3 << (ahp->ah_btActiveGpioSelect * 2)));

        ahp->ah_btCoexEnabled = AH_TRUE;

        return (0);
}

void
ar5416InitBTCoex(struct ath_hal *ah)
{
        struct ath_hal_5416 *ahp = AH5416(ah);

        HALDEBUG(ah, HAL_DEBUG_BT_COEX,
            "%s: called; configType=%d\n",
            __func__,
            ahp->ah_btCoexConfigType);

        if (ahp->ah_btCoexConfigType == HAL_BT_COEX_CFG_3WIRE) {
                OS_REG_SET_BIT(ah, AR_GPIO_INPUT_EN_VAL,
                    (AR_GPIO_INPUT_EN_VAL_BT_PRIORITY_BB |
                    AR_GPIO_INPUT_EN_VAL_BT_ACTIVE_BB));

                /*
                 * Set input mux for bt_prority_async and
                 * bt_active_async to GPIO pins
                 */
                OS_REG_RMW_FIELD(ah, AR_GPIO_INPUT_MUX1,
                    AR_GPIO_INPUT_MUX1_BT_ACTIVE,
                    ahp->ah_btActiveGpioSelect);
                OS_REG_RMW_FIELD(ah, AR_GPIO_INPUT_MUX1,
                    AR_GPIO_INPUT_MUX1_BT_PRIORITY,
                    ahp->ah_btPriorityGpioSelect);

                /*
                 * Configure the desired GPIO ports for input
                 */
                ar5416GpioCfgInput(ah, ahp->ah_btActiveGpioSelect);
                ar5416GpioCfgInput(ah, ahp->ah_btPriorityGpioSelect);

                /*
                 * Configure the antenna diversity setup.
                 * It's a no-op for AR9287; AR9285 overrides this
                 * as required.
                 */
                AH5416(ah)->ah_btCoexSetDiversity(ah);

                if (ahp->ah_btCoexEnabled)
                        ar5416BTCoexEnable(ah);
                else
                        ar5416BTCoexDisable(ah);
        } else if (ahp->ah_btCoexConfigType != HAL_BT_COEX_CFG_NONE) {
                /* 2-wire */
                if (ahp->ah_btCoexEnabled) {
                        /* Connect bt_active_async to baseband */
                        OS_REG_CLR_BIT(ah, AR_GPIO_INPUT_EN_VAL,
                            (AR_GPIO_INPUT_EN_VAL_BT_PRIORITY_DEF |
                             AR_GPIO_INPUT_EN_VAL_BT_FREQUENCY_DEF));
                        OS_REG_SET_BIT(ah, AR_GPIO_INPUT_EN_VAL,
                            AR_GPIO_INPUT_EN_VAL_BT_ACTIVE_BB);

                        /*
                         * Set input mux for bt_prority_async and
                         * bt_active_async to GPIO pins
                         */
                        OS_REG_RMW_FIELD(ah, AR_GPIO_INPUT_MUX1,
                            AR_GPIO_INPUT_MUX1_BT_ACTIVE,
                            ahp->ah_btActiveGpioSelect);

                        /* Configure the desired GPIO ports for input */
                        ar5416GpioCfgInput(ah, ahp->ah_btActiveGpioSelect);

                        /* Enable coexistence on initialization */
                        ar5416BTCoexEnable(ah);
                }
        }
}