/*
 * Copyright (c) 2010-2011 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 <linux/dma-mapping.h>
#include <linux/slab.h>

#include "ath9k.h"
#include "mci.h"

static const u8 ath_mci_duty_cycle[] = { 55, 50, 60, 70, 80, 85, 90, 95, 98 };

static struct ath_mci_profile_info*
ath_mci_find_profile(struct ath_mci_profile *mci,
                     struct ath_mci_profile_info *info)
{
        struct ath_mci_profile_info *entry;

        if (list_empty(&mci->info))
                return NULL;

        list_for_each_entry(entry, &mci->info, list) {
                if (entry->conn_handle == info->conn_handle)
                        return entry;
        }
        return NULL;
}

static bool ath_mci_add_profile(struct ath_common *common,
                                struct ath_mci_profile *mci,
                                struct ath_mci_profile_info *info)
{
        struct ath_mci_profile_info *entry;
        static const u8 voice_priority[] = { 110, 110, 110, 112, 110, 110, 114, 116, 118 };

        if ((mci->num_sco == ATH_MCI_MAX_SCO_PROFILE) &&
            (info->type == MCI_GPM_COEX_PROFILE_VOICE))
                return false;

        if (((NUM_PROF(mci) - mci->num_sco) == ATH_MCI_MAX_ACL_PROFILE) &&
            (info->type != MCI_GPM_COEX_PROFILE_VOICE))
                return false;

        entry = kzalloc_obj(*entry, GFP_ATOMIC);
        if (!entry)
                return false;

        memcpy(entry, info, 10);
        INC_PROF(mci, info);
        list_add_tail(&entry->list, &mci->info);
        if (info->type == MCI_GPM_COEX_PROFILE_VOICE) {
                if (info->voice_type < sizeof(voice_priority))
                        mci->voice_priority = voice_priority[info->voice_type];
                else
                        mci->voice_priority = 110;
        }

        return true;
}

static void ath_mci_del_profile(struct ath_common *common,
                                struct ath_mci_profile *mci,
                                struct ath_mci_profile_info *entry)
{
        if (!entry)
                return;

        DEC_PROF(mci, entry);
        list_del(&entry->list);
        kfree(entry);
}

void ath_mci_flush_profile(struct ath_mci_profile *mci)
{
        struct ath_mci_profile_info *info, *tinfo;

        mci->aggr_limit = 0;
        mci->num_mgmt = 0;

        if (list_empty(&mci->info))
                return;

        list_for_each_entry_safe(info, tinfo, &mci->info, list) {
                list_del(&info->list);
                DEC_PROF(mci, info);
                kfree(info);
        }
}

static void ath_mci_adjust_aggr_limit(struct ath_btcoex *btcoex)
{
        struct ath_mci_profile *mci = &btcoex->mci;
        u32 wlan_airtime = btcoex->btcoex_period *
                                (100 - btcoex->duty_cycle) / 100;

        /*
         * Scale: wlan_airtime is in ms, aggr_limit is in 0.25 ms.
         * When wlan_airtime is less than 4ms, aggregation limit has to be
         * adjusted half of wlan_airtime to ensure that the aggregation can fit
         * without collision with BT traffic.
         */
        if ((wlan_airtime <= 4) &&
            (!mci->aggr_limit || (mci->aggr_limit > (2 * wlan_airtime))))
                mci->aggr_limit = 2 * wlan_airtime;
}

static void ath_mci_update_scheme(struct ath_softc *sc)
{
        struct ath_common *common = ath9k_hw_common(sc->sc_ah);
        struct ath_btcoex *btcoex = &sc->btcoex;
        struct ath_mci_profile *mci = &btcoex->mci;
        struct ath9k_hw_mci *mci_hw = &sc->sc_ah->btcoex_hw.mci;
        struct ath_mci_profile_info *info;
        u32 num_profile = NUM_PROF(mci);

        if (mci_hw->config & ATH_MCI_CONFIG_DISABLE_TUNING)
                goto skip_tuning;

        mci->aggr_limit = 0;
        btcoex->duty_cycle = ath_mci_duty_cycle[num_profile];
        btcoex->btcoex_period = ATH_MCI_DEF_BT_PERIOD;
        if (NUM_PROF(mci))
                btcoex->bt_stomp_type = ATH_BTCOEX_STOMP_LOW;
        else
                btcoex->bt_stomp_type = mci->num_mgmt ? ATH_BTCOEX_STOMP_ALL :
                                                        ATH_BTCOEX_STOMP_LOW;

        if (num_profile == 1) {
                info = list_first_entry(&mci->info,
                                        struct ath_mci_profile_info,
                                        list);
                if (mci->num_sco) {
                        if (info->T == 12)
                                mci->aggr_limit = 8;
                        else if (info->T == 6) {
                                mci->aggr_limit = 6;
                                btcoex->duty_cycle = 30;
                        } else
                                mci->aggr_limit = 6;
                        ath_dbg(common, MCI,
                                "Single SCO, aggregation limit %d 1/4 ms\n",
                                mci->aggr_limit);
                } else if (mci->num_pan || mci->num_other_acl) {
                        /*
                         * For single PAN/FTP profile, allocate 35% for BT
                         * to improve WLAN throughput.
                         */
                        btcoex->duty_cycle = AR_SREV_9565(sc->sc_ah) ? 40 : 35;
                        btcoex->btcoex_period = 53;
                        ath_dbg(common, MCI,
                                "Single PAN/FTP bt period %d ms dutycycle %d\n",
                                btcoex->duty_cycle, btcoex->btcoex_period);
                } else if (mci->num_hid) {
                        btcoex->duty_cycle = 30;
                        mci->aggr_limit = 6;
                        ath_dbg(common, MCI,
                                "Multiple attempt/timeout single HID "
                                "aggregation limit 1.5 ms dutycycle 30%%\n");
                }
        } else if (num_profile == 2) {
                if (mci->num_hid == 2)
                        btcoex->duty_cycle = 30;
                mci->aggr_limit = 6;
                ath_dbg(common, MCI,
                        "Two BT profiles aggr limit 1.5 ms dutycycle %d%%\n",
                        btcoex->duty_cycle);
        } else if (num_profile >= 3) {
                mci->aggr_limit = 4;
                ath_dbg(common, MCI,
                        "Three or more profiles aggregation limit 1 ms\n");
        }

skip_tuning:
        if (IS_CHAN_2GHZ(sc->sc_ah->curchan)) {
                if (IS_CHAN_HT(sc->sc_ah->curchan))
                        ath_mci_adjust_aggr_limit(btcoex);
                else
                        btcoex->btcoex_period >>= 1;
        }

        ath9k_btcoex_timer_pause(sc);
        ath9k_hw_btcoex_disable(sc->sc_ah);

        if (IS_CHAN_5GHZ(sc->sc_ah->curchan))
                return;

        btcoex->duty_cycle += (mci->num_bdr ? ATH_MCI_BDR_DUTY_CYCLE : 0);
        if (btcoex->duty_cycle > ATH_MCI_MAX_DUTY_CYCLE)
                btcoex->duty_cycle = ATH_MCI_MAX_DUTY_CYCLE;

        btcoex->btcoex_no_stomp =  btcoex->btcoex_period *
                (100 - btcoex->duty_cycle) / 100;

        ath9k_hw_btcoex_enable(sc->sc_ah);
        ath9k_btcoex_timer_resume(sc);
}

static void ath_mci_cal_msg(struct ath_softc *sc, u8 opcode, u8 *rx_payload)
{
        struct ath_hw *ah = sc->sc_ah;
        struct ath_common *common = ath9k_hw_common(ah);
        struct ath9k_hw_mci *mci_hw = &ah->btcoex_hw.mci;
        u32 payload[4] = {0, 0, 0, 0};

        switch (opcode) {
        case MCI_GPM_BT_CAL_REQ:
                if (mci_hw->bt_state == MCI_BT_AWAKE) {
                        mci_hw->bt_state = MCI_BT_CAL_START;
                        ath9k_queue_reset(sc, RESET_TYPE_MCI);
                }
                ath_dbg(common, MCI, "MCI State : %d\n", mci_hw->bt_state);
                break;
        case MCI_GPM_BT_CAL_GRANT:
                MCI_GPM_SET_CAL_TYPE(payload, MCI_GPM_WLAN_CAL_DONE);
                ar9003_mci_send_message(sc->sc_ah, MCI_GPM, 0, payload,
                                        16, false, true);
                break;
        default:
                ath_dbg(common, MCI, "Unknown GPM CAL message\n");
                break;
        }
}

static void ath9k_mci_work(struct work_struct *work)
{
        struct ath_softc *sc = container_of(work, struct ath_softc, mci_work);

        ath_mci_update_scheme(sc);
}

static void ath_mci_update_stomp_txprio(u8 cur_txprio, u8 *stomp_prio)
{
        if (cur_txprio < stomp_prio[ATH_BTCOEX_STOMP_NONE])
                stomp_prio[ATH_BTCOEX_STOMP_NONE] = cur_txprio;

        if (cur_txprio > stomp_prio[ATH_BTCOEX_STOMP_ALL])
                stomp_prio[ATH_BTCOEX_STOMP_ALL] = cur_txprio;

        if ((cur_txprio > ATH_MCI_HI_PRIO) &&
            (cur_txprio < stomp_prio[ATH_BTCOEX_STOMP_LOW]))
                stomp_prio[ATH_BTCOEX_STOMP_LOW] = cur_txprio;
}

static void ath_mci_set_concur_txprio(struct ath_softc *sc)
{
        struct ath_btcoex *btcoex = &sc->btcoex;
        struct ath_mci_profile *mci = &btcoex->mci;
        u8 stomp_txprio[ATH_BTCOEX_STOMP_MAX];

        memset(stomp_txprio, 0, sizeof(stomp_txprio));
        if (mci->num_mgmt) {
                stomp_txprio[ATH_BTCOEX_STOMP_ALL] = ATH_MCI_INQUIRY_PRIO;
                if (!mci->num_pan && !mci->num_other_acl)
                        stomp_txprio[ATH_BTCOEX_STOMP_NONE] =
                                ATH_MCI_INQUIRY_PRIO;
        } else {
                static const u8 prof_prio[] = {
                        50, 90, 94, 52
                }; /* RFCOMM, A2DP, HID, PAN */

                stomp_txprio[ATH_BTCOEX_STOMP_LOW] =
                stomp_txprio[ATH_BTCOEX_STOMP_NONE] = 0xff;

                if (mci->num_sco)
                        ath_mci_update_stomp_txprio(mci->voice_priority,
                                                    stomp_txprio);
                if (mci->num_other_acl)
                        ath_mci_update_stomp_txprio(prof_prio[0], stomp_txprio);
                if (mci->num_a2dp)
                        ath_mci_update_stomp_txprio(prof_prio[1], stomp_txprio);
                if (mci->num_hid)
                        ath_mci_update_stomp_txprio(prof_prio[2], stomp_txprio);
                if (mci->num_pan)
                        ath_mci_update_stomp_txprio(prof_prio[3], stomp_txprio);

                if (stomp_txprio[ATH_BTCOEX_STOMP_NONE] == 0xff)
                        stomp_txprio[ATH_BTCOEX_STOMP_NONE] = 0;

                if (stomp_txprio[ATH_BTCOEX_STOMP_LOW] == 0xff)
                        stomp_txprio[ATH_BTCOEX_STOMP_LOW] = 0;
        }
        ath9k_hw_btcoex_set_concur_txprio(sc->sc_ah, stomp_txprio);
}

static u8 ath_mci_process_profile(struct ath_softc *sc,
                                  struct ath_mci_profile_info *info)
{
        struct ath_common *common = ath9k_hw_common(sc->sc_ah);
        struct ath_btcoex *btcoex = &sc->btcoex;
        struct ath_mci_profile *mci = &btcoex->mci;
        struct ath_mci_profile_info *entry = NULL;

        entry = ath_mci_find_profile(mci, info);
        if (entry) {
                /*
                 * Two MCI interrupts are generated while connecting to
                 * headset and A2DP profile, but only one MCI interrupt
                 * is generated with last added profile type while disconnecting
                 * both profiles.
                 * So while adding second profile type decrement
                 * the first one.
                 */
                if (entry->type != info->type) {
                        DEC_PROF(mci, entry);
                        INC_PROF(mci, info);
                }
                memcpy(entry, info, 10);
        }

        if (info->start) {
                if (!entry && !ath_mci_add_profile(common, mci, info))
                        return 0;
        } else
                ath_mci_del_profile(common, mci, entry);

        ath_mci_set_concur_txprio(sc);
        return 1;
}

static u8 ath_mci_process_status(struct ath_softc *sc,
                                 struct ath_mci_profile_status *status)
{
        struct ath_btcoex *btcoex = &sc->btcoex;
        struct ath_mci_profile *mci = &btcoex->mci;
        struct ath_mci_profile_info info;
        int i = 0, old_num_mgmt = mci->num_mgmt;

        /* Link status type are not handled */
        if (status->is_link)
                return 0;

        info.conn_handle = status->conn_handle;
        if (ath_mci_find_profile(mci, &info))
                return 0;

        if (status->conn_handle >= ATH_MCI_MAX_PROFILE)
                return 0;

        if (status->is_critical)
                __set_bit(status->conn_handle, mci->status);
        else
                __clear_bit(status->conn_handle, mci->status);

        mci->num_mgmt = 0;
        do {
                if (test_bit(i, mci->status))
                        mci->num_mgmt++;
        } while (++i < ATH_MCI_MAX_PROFILE);

        ath_mci_set_concur_txprio(sc);
        if (old_num_mgmt != mci->num_mgmt)
                return 1;

        return 0;
}

static void ath_mci_msg(struct ath_softc *sc, u8 opcode, u8 *rx_payload)
{
        struct ath_hw *ah = sc->sc_ah;
        struct ath_mci_profile_info profile_info;
        struct ath_mci_profile_status profile_status;
        struct ath_common *common = ath9k_hw_common(sc->sc_ah);
        u8 major, minor, update_scheme = 0;
        u32 seq_num;

        if (ar9003_mci_state(ah, MCI_STATE_NEED_FLUSH_BT_INFO) &&
            ar9003_mci_state(ah, MCI_STATE_ENABLE)) {
                ath_dbg(common, MCI, "(MCI) Need to flush BT profiles\n");
                ath_mci_flush_profile(&sc->btcoex.mci);
                ar9003_mci_state(ah, MCI_STATE_SEND_STATUS_QUERY);
        }

        switch (opcode) {
        case MCI_GPM_COEX_VERSION_QUERY:
                ar9003_mci_state(ah, MCI_STATE_SEND_WLAN_COEX_VERSION);
                break;
        case MCI_GPM_COEX_VERSION_RESPONSE:
                major = *(rx_payload + MCI_GPM_COEX_B_MAJOR_VERSION);
                minor = *(rx_payload + MCI_GPM_COEX_B_MINOR_VERSION);
                ar9003_mci_set_bt_version(ah, major, minor);
                break;
        case MCI_GPM_COEX_STATUS_QUERY:
                ar9003_mci_send_wlan_channels(ah);
                break;
        case MCI_GPM_COEX_BT_PROFILE_INFO:
                memcpy(&profile_info,
                       (rx_payload + MCI_GPM_COEX_B_PROFILE_TYPE), 10);

                if ((profile_info.type == MCI_GPM_COEX_PROFILE_UNKNOWN) ||
                    (profile_info.type >= MCI_GPM_COEX_PROFILE_MAX)) {
                        ath_dbg(common, MCI,
                                "Illegal profile type = %d, state = %d\n",
                                profile_info.type,
                                profile_info.start);
                        break;
                }

                update_scheme += ath_mci_process_profile(sc, &profile_info);
                break;
        case MCI_GPM_COEX_BT_STATUS_UPDATE:
                profile_status.is_link = *(rx_payload +
                                           MCI_GPM_COEX_B_STATUS_TYPE);
                profile_status.conn_handle = *(rx_payload +
                                               MCI_GPM_COEX_B_STATUS_LINKID);
                profile_status.is_critical = *(rx_payload +
                                               MCI_GPM_COEX_B_STATUS_STATE);

                seq_num = *((u32 *)(rx_payload + 12));
                ath_dbg(common, MCI,
                        "BT_Status_Update: is_link=%d, linkId=%d, state=%d, SEQ=%u\n",
                        profile_status.is_link, profile_status.conn_handle,
                        profile_status.is_critical, seq_num);

                update_scheme += ath_mci_process_status(sc, &profile_status);
                break;
        default:
                ath_dbg(common, MCI, "Unknown GPM COEX message = 0x%02x\n", opcode);
                break;
        }
        if (update_scheme)
                ieee80211_queue_work(sc->hw, &sc->mci_work);
}

int ath_mci_setup(struct ath_softc *sc)
{
        struct ath_common *common = ath9k_hw_common(sc->sc_ah);
        struct ath_mci_coex *mci = &sc->mci_coex;
        struct ath_mci_buf *buf = &mci->sched_buf;
        int ret;

        buf->bf_addr = dmam_alloc_coherent(sc->dev,
                                  ATH_MCI_SCHED_BUF_SIZE + ATH_MCI_GPM_BUF_SIZE,
                                  &buf->bf_paddr, GFP_KERNEL);

        if (buf->bf_addr == NULL) {
                ath_dbg(common, FATAL, "MCI buffer alloc failed\n");
                return -ENOMEM;
        }

        memset(buf->bf_addr, MCI_GPM_RSVD_PATTERN,
               ATH_MCI_SCHED_BUF_SIZE + ATH_MCI_GPM_BUF_SIZE);

        mci->sched_buf.bf_len = ATH_MCI_SCHED_BUF_SIZE;

        mci->gpm_buf.bf_len = ATH_MCI_GPM_BUF_SIZE;
        mci->gpm_buf.bf_addr = mci->sched_buf.bf_addr + mci->sched_buf.bf_len;
        mci->gpm_buf.bf_paddr = mci->sched_buf.bf_paddr + mci->sched_buf.bf_len;

        ret = ar9003_mci_setup(sc->sc_ah, mci->gpm_buf.bf_paddr,
                               mci->gpm_buf.bf_addr, (mci->gpm_buf.bf_len >> 4),
                               mci->sched_buf.bf_paddr);
        if (ret) {
                ath_err(common, "Failed to initialize MCI\n");
                return ret;
        }

        INIT_WORK(&sc->mci_work, ath9k_mci_work);
        ath_dbg(common, MCI, "MCI Initialized\n");

        return 0;
}

void ath_mci_cleanup(struct ath_softc *sc)
{
        struct ath_common *common = ath9k_hw_common(sc->sc_ah);
        struct ath_hw *ah = sc->sc_ah;

        ar9003_mci_cleanup(ah);

        ath_dbg(common, MCI, "MCI De-Initialized\n");
}

void ath_mci_intr(struct ath_softc *sc)
{
        struct ath_mci_coex *mci = &sc->mci_coex;
        struct ath_hw *ah = sc->sc_ah;
        struct ath_common *common = ath9k_hw_common(ah);
        struct ath9k_hw_mci *mci_hw = &ah->btcoex_hw.mci;
        u32 mci_int, mci_int_rxmsg;
        u32 offset, subtype, opcode;
        u32 *pgpm;
        u32 more_data = MCI_GPM_MORE;
        bool skip_gpm = false;

        ar9003_mci_get_interrupt(sc->sc_ah, &mci_int, &mci_int_rxmsg);

        if (ar9003_mci_state(ah, MCI_STATE_ENABLE) == 0) {
                ar9003_mci_state(ah, MCI_STATE_INIT_GPM_OFFSET);
                return;
        }

        if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_REQ_WAKE) {
                u32 payload[4] = { 0xffffffff, 0xffffffff,
                                   0xffffffff, 0xffffff00};

                /*
                 * The following REMOTE_RESET and SYS_WAKING used to sent
                 * only when BT wake up. Now they are always sent, as a
                 * recovery method to reset BT MCI's RX alignment.
                 */
                ar9003_mci_send_message(ah, MCI_REMOTE_RESET, 0,
                                        payload, 16, true, false);
                ar9003_mci_send_message(ah, MCI_SYS_WAKING, 0,
                                        NULL, 0, true, false);

                mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_REQ_WAKE;
                ar9003_mci_state(ah, MCI_STATE_RESET_REQ_WAKE);

                /*
                 * always do this for recovery and 2G/5G toggling and LNA_TRANS
                 */
                ar9003_mci_state(ah, MCI_STATE_SET_BT_AWAKE);
        }

        if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_SYS_WAKING) {
                mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_SYS_WAKING;

                if ((mci_hw->bt_state == MCI_BT_SLEEP) &&
                    (ar9003_mci_state(ah, MCI_STATE_REMOTE_SLEEP) !=
                     MCI_BT_SLEEP))
                        ar9003_mci_state(ah, MCI_STATE_SET_BT_AWAKE);
        }

        if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_SYS_SLEEPING) {
                mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_SYS_SLEEPING;

                if ((mci_hw->bt_state == MCI_BT_AWAKE) &&
                    (ar9003_mci_state(ah, MCI_STATE_REMOTE_SLEEP) !=
                     MCI_BT_AWAKE))
                        mci_hw->bt_state = MCI_BT_SLEEP;
        }

        if ((mci_int & AR_MCI_INTERRUPT_RX_INVALID_HDR) ||
            (mci_int & AR_MCI_INTERRUPT_CONT_INFO_TIMEOUT)) {
                ar9003_mci_state(ah, MCI_STATE_RECOVER_RX);
                skip_gpm = true;
        }

        if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_SCHD_INFO) {
                mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_SCHD_INFO;
                ar9003_mci_state(ah, MCI_STATE_LAST_SCHD_MSG_OFFSET);
        }

        if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_GPM) {
                mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_GPM;

                while (more_data == MCI_GPM_MORE) {
                        if (test_bit(ATH_OP_HW_RESET, &common->op_flags))
                                return;

                        pgpm = mci->gpm_buf.bf_addr;
                        offset = ar9003_mci_get_next_gpm_offset(ah, &more_data);

                        if (offset == MCI_GPM_INVALID)
                                break;

                        pgpm += (offset >> 2);

                        /*
                         * The first dword is timer.
                         * The real data starts from 2nd dword.
                         */
                        subtype = MCI_GPM_TYPE(pgpm);
                        opcode = MCI_GPM_OPCODE(pgpm);

                        if (skip_gpm)
                                goto recycle;

                        if (MCI_GPM_IS_CAL_TYPE(subtype)) {
                                ath_mci_cal_msg(sc, subtype, (u8 *)pgpm);
                        } else {
                                switch (subtype) {
                                case MCI_GPM_COEX_AGENT:
                                        ath_mci_msg(sc, opcode, (u8 *)pgpm);
                                        break;
                                default:
                                        break;
                                }
                        }
                recycle:
                        MCI_GPM_RECYCLE(pgpm);
                }
        }

        if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_HW_MSG_MASK) {
                if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_LNA_CONTROL)
                        mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_LNA_CONTROL;

                if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_LNA_INFO)
                        mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_LNA_INFO;

                if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_CONT_INFO) {
                        int value_dbm = MS(mci_hw->cont_status,
                                           AR_MCI_CONT_RSSI_POWER);

                        mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_CONT_INFO;

                        ath_dbg(common, MCI,
                                "MCI CONT_INFO: (%s) pri = %d pwr = %d dBm\n",
                                MS(mci_hw->cont_status, AR_MCI_CONT_TXRX) ?
                                "tx" : "rx",
                                MS(mci_hw->cont_status, AR_MCI_CONT_PRIORITY),
                                value_dbm);
                }

                if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_CONT_NACK)
                        mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_CONT_NACK;

                if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_CONT_RST)
                        mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_CONT_RST;
        }

        if ((mci_int & AR_MCI_INTERRUPT_RX_INVALID_HDR) ||
            (mci_int & AR_MCI_INTERRUPT_CONT_INFO_TIMEOUT)) {
                mci_int &= ~(AR_MCI_INTERRUPT_RX_INVALID_HDR |
                             AR_MCI_INTERRUPT_CONT_INFO_TIMEOUT);
                ath_mci_msg(sc, MCI_GPM_COEX_NOOP, NULL);
        }
}

void ath_mci_enable(struct ath_softc *sc)
{
        struct ath_common *common = ath9k_hw_common(sc->sc_ah);

        if (!common->btcoex_enabled)
                return;

        if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_MCI)
                sc->sc_ah->imask |= ATH9K_INT_MCI;
}

void ath9k_mci_update_wlan_channels(struct ath_softc *sc, bool allow_all)
{
        struct ath_hw *ah = sc->sc_ah;
        struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
        struct ath9k_channel *chan = ah->curchan;
        u32 channelmap[] = {0x00000000, 0xffff0000, 0xffffffff, 0x7fffffff};
        int i;
        s16 chan_start, chan_end;
        u16 wlan_chan;

        if (!chan || !IS_CHAN_2GHZ(chan))
                return;

        if (allow_all)
                goto send_wlan_chan;

        wlan_chan = chan->channel - 2402;

        chan_start = wlan_chan - 10;
        chan_end = wlan_chan + 10;

        if (IS_CHAN_HT40PLUS(chan))
                chan_end += 20;
        else if (IS_CHAN_HT40MINUS(chan))
                chan_start -= 20;

        /* adjust side band */
        chan_start -= 7;
        chan_end += 7;

        if (chan_start <= 0)
                chan_start = 0;
        if (chan_end >= ATH_MCI_NUM_BT_CHANNELS)
                chan_end = ATH_MCI_NUM_BT_CHANNELS - 1;

        ath_dbg(ath9k_hw_common(ah), MCI,
                "WLAN current channel %d mask BT channel %d - %d\n",
                wlan_chan, chan_start, chan_end);

        for (i = chan_start; i < chan_end; i++)
                MCI_GPM_CLR_CHANNEL_BIT(&channelmap, i);

send_wlan_chan:
        /* update and send wlan channels info to BT */
        for (i = 0; i < 4; i++)
                mci->wlan_channels[i] = channelmap[i];
        ar9003_mci_send_wlan_channels(ah);
        ar9003_mci_state(ah, MCI_STATE_SEND_VERSION_QUERY);
}

void ath9k_mci_set_txpower(struct ath_softc *sc, bool setchannel,
                           bool concur_tx)
{
        struct ath_hw *ah = sc->sc_ah;
        struct ath9k_hw_mci *mci_hw = &sc->sc_ah->btcoex_hw.mci;
        bool old_concur_tx = mci_hw->concur_tx;

        if (!(mci_hw->config & ATH_MCI_CONFIG_CONCUR_TX)) {
                mci_hw->concur_tx = false;
                return;
        }

        if (!IS_CHAN_2GHZ(ah->curchan))
                return;

        if (setchannel) {
                struct ath9k_hw_cal_data *caldata = &sc->cur_chan->caldata;
                if (IS_CHAN_HT40PLUS(ah->curchan) &&
                    (ah->curchan->channel > caldata->channel) &&
                    (ah->curchan->channel <= caldata->channel + 20))
                        return;
                if (IS_CHAN_HT40MINUS(ah->curchan) &&
                    (ah->curchan->channel < caldata->channel) &&
                    (ah->curchan->channel >= caldata->channel - 20))
                        return;
                mci_hw->concur_tx = false;
        } else
                mci_hw->concur_tx = concur_tx;

        if (old_concur_tx != mci_hw->concur_tx)
                ath9k_hw_set_txpowerlimit(ah, sc->cur_chan->txpower, false);
}

static void ath9k_mci_stomp_audio(struct ath_softc *sc)
{
        struct ath_hw *ah = sc->sc_ah;
        struct ath_btcoex *btcoex = &sc->btcoex;
        struct ath_mci_profile *mci = &btcoex->mci;

        if (!mci->num_sco && !mci->num_a2dp)
                return;

        if (ah->stats.avgbrssi > 25) {
                btcoex->stomp_audio = 0;
                return;
        }

        btcoex->stomp_audio++;
}
void ath9k_mci_update_rssi(struct ath_softc *sc)
{
        struct ath_hw *ah = sc->sc_ah;
        struct ath_btcoex *btcoex = &sc->btcoex;
        struct ath9k_hw_mci *mci_hw = &sc->sc_ah->btcoex_hw.mci;

        ath9k_mci_stomp_audio(sc);

        if (!(mci_hw->config & ATH_MCI_CONFIG_CONCUR_TX))
                return;

        if (ah->stats.avgbrssi >= 40) {
                if (btcoex->rssi_count < 0)
                        btcoex->rssi_count = 0;
                if (++btcoex->rssi_count >= ATH_MCI_CONCUR_TX_SWITCH) {
                        btcoex->rssi_count = 0;
                        ath9k_mci_set_txpower(sc, false, true);
                }
        } else {
                if (btcoex->rssi_count > 0)
                        btcoex->rssi_count = 0;
                if (--btcoex->rssi_count <= -ATH_MCI_CONCUR_TX_SWITCH) {
                        btcoex->rssi_count = 0;
                        ath9k_mci_set_txpower(sc, false, false);
                }
        }
}