rtw88: add BT co-existence support

Both RTL8822BE/RTL8822CE are WiFi + BT combo chips. Since
WiFi and BT use 2.4GHz to transmit, it is important to
make sure they run concurrently without interfering each
other. To achieve this, WiFi driver requires a mechanism
to collaborate with BT, whether they share the antenna(s)
or not.

The final decision made by the co-existence mechanism is
to choose a proper strategy, or called "tdma/table", and
inform either firmware or hardware of the strategy.
To choose a strategy, co-existence mechanism needs to
have enough information from WiFi and BT.

BT information is provided through firmware C2H.
The contents describe the current status of BT, such as
if BT is connected or is idle, or the profile that is
being used.

WiFi information can be provided by WiFi itself. The WiFi
driver will call various of "notify" functions each time
the state of WiFi changed, such as WiFi is going to switch
channel or is connected. Also WiFi driver can know if it
shares antenna with BT by reading efuse content. Antenna
configuration of the module will finally get a different
strategy.

Upon receiving any information from WiFi or BT, the WiFi
driver will run the co-existence mechanism immediately.
It will set the RF antenna configuration according to the
strategy through the TDMA H2C to firmware and a hardware
table. Based on the tdma/table, WiFi + BT should work with
each other, and having a better user experience.

Signed-off-by: Yan-Hsuan Chuang <yhchuang@realtek.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

1 files changed, 2507 insertions, 0 deletions

diff --git a/drivers/net/wireless/realtek/rtw88/coex.c b/drivers/net/wireless/realtek/rtw88/coex.c
new file mode 100644
index 000000000000..4577fceddc5e
--- /dev/null
+++ b/drivers/net/wireless/realtek/rtw88/coex.c
@@ -0,0 +1,2507 @@
+// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
+/* Copyright(c) 2018-2019  Realtek Corporation
+ */
+
+#include "main.h"
+#include "coex.h"
+#include "fw.h"
+#include "ps.h"
+#include "debug.h"
+#include "reg.h"
+
+static u8 rtw_coex_next_rssi_state(struct rtw_dev *rtwdev, u8 pre_state,
+				   u8 rssi, u8 rssi_thresh)
+{
+	struct rtw_chip_info *chip = rtwdev->chip;
+	u8 tol = chip->rssi_tolerance;
+	u8 next_state;
+
+	if (pre_state == COEX_RSSI_STATE_LOW ||
+	    pre_state == COEX_RSSI_STATE_STAY_LOW) {
+		if (rssi >= (rssi_thresh + tol))
+			next_state = COEX_RSSI_STATE_HIGH;
+		else
+			next_state = COEX_RSSI_STATE_STAY_LOW;
+	} else {
+		if (rssi < rssi_thresh)
+			next_state = COEX_RSSI_STATE_LOW;
+		else
+			next_state = COEX_RSSI_STATE_STAY_HIGH;
+	}
+
+	return next_state;
+}
+
+static void rtw_coex_limited_tx(struct rtw_dev *rtwdev,
+				bool tx_limit_en, bool ampdu_limit_en)
+{
+	struct rtw_chip_info *chip = rtwdev->chip;
+	struct rtw_coex *coex = &rtwdev->coex;
+	struct rtw_coex_stat *coex_stat = &coex->stat;
+	bool wifi_under_b_mode = false;
+
+	if (!chip->scbd_support)
+		return;
+
+	/* force max tx retry limit = 8 */
+	if (coex_stat->wl_tx_limit_en == tx_limit_en &&
+	    coex_stat->wl_ampdu_limit_en == ampdu_limit_en)
+		return;
+
+	if (!coex_stat->wl_tx_limit_en) {
+		coex_stat->darfrc = rtw_read32(rtwdev, REG_DARFRC);
+		coex_stat->darfrch = rtw_read32(rtwdev, REG_DARFRCH);
+		coex_stat->retry_limit = rtw_read16(rtwdev, REG_RETRY_LIMIT);
+	}
+
+	if (!coex_stat->wl_ampdu_limit_en)
+		coex_stat->ampdu_max_time =
+				rtw_read8(rtwdev, REG_AMPDU_MAX_TIME_V1);
+
+	coex_stat->wl_tx_limit_en = tx_limit_en;
+	coex_stat->wl_ampdu_limit_en = ampdu_limit_en;
+
+	if (tx_limit_en) {
+		/* set BT polluted packet on for tx rate adaptive,
+		 * not including tx retry broken by PTA
+		 */
+		rtw_write8_set(rtwdev, REG_TX_HANG_CTRL, BIT_EN_GNT_BT_AWAKE);
+
+		/* set queue life time to avoid can't reach tx retry limit
+		 * if tx is always broken by GNT_BT
+		 */
+		rtw_write8_set(rtwdev, REG_LIFETIME_EN, 0xf);
+		rtw_write16(rtwdev, REG_RETRY_LIMIT, 0x0808);
+
+		/* auto rate fallback step within 8 retries */
+		if (wifi_under_b_mode) {
+			rtw_write32(rtwdev, REG_DARFRC, 0x1000000);
+			rtw_write32(rtwdev, REG_DARFRCH, 0x1010101);
+		} else {
+			rtw_write32(rtwdev, REG_DARFRC, 0x1000000);
+			rtw_write32(rtwdev, REG_DARFRCH, 0x4030201);
+		}
+	} else {
+		rtw_write8_clr(rtwdev, REG_TX_HANG_CTRL, BIT_EN_GNT_BT_AWAKE);
+		rtw_write8_clr(rtwdev, REG_LIFETIME_EN, 0xf);
+
+		rtw_write16(rtwdev, REG_RETRY_LIMIT, coex_stat->retry_limit);
+		rtw_write32(rtwdev, REG_DARFRC, coex_stat->darfrc);
+		rtw_write32(rtwdev, REG_DARFRCH, coex_stat->darfrch);
+	}
+
+	if (ampdu_limit_en)
+		rtw_write8(rtwdev, REG_AMPDU_MAX_TIME_V1, 0x20);
+	else
+		rtw_write8(rtwdev, REG_AMPDU_MAX_TIME_V1,
+			   coex_stat->ampdu_max_time);
+}
+
+static void rtw_coex_limited_wl(struct rtw_dev *rtwdev)
+{
+	struct rtw_coex *coex = &rtwdev->coex;
+	struct rtw_coex_dm *coex_dm = &coex->dm;
+	struct rtw_coex_stat *coex_stat = &coex->stat;
+	bool tx_limit = false;
+	bool tx_agg_ctrl = false;
+
+	if (coex->under_5g ||
+	    coex_dm->bt_status == COEX_BTSTATUS_NCON_IDLE) {
+		/* no need to limit tx */
+	} else {
+		tx_limit = true;
+		if (coex_stat->bt_hid_exist || coex_stat->bt_hfp_exist ||
+		    coex_stat->bt_hid_pair_num > 0)
+			tx_agg_ctrl = true;
+	}
+
+	rtw_coex_limited_tx(rtwdev, tx_limit, tx_agg_ctrl);
+}
+
+static void rtw_coex_wl_ccklock_action(struct rtw_dev *rtwdev)
+{
+	struct rtw_coex *coex = &rtwdev->coex;
+	struct rtw_coex_stat *coex_stat = &coex->stat;
+	u8 para[6] = {0};
+
+	if (coex->stop_dm)
+		return;
+
+	para[0] = COEX_H2C69_WL_LEAKAP;
+
+	if (coex_stat->tdma_timer_base == 3 && coex_stat->wl_slot_extend) {
+		para[1] = PARA1_H2C69_DIS_5MS; /* disable 5ms extend */
+		rtw_fw_bt_wifi_control(rtwdev, para[0], &para[1]);
+		coex_stat->wl_slot_extend = false;
+		coex_stat->cnt_wl[COEX_CNT_WL_5MS_NOEXTEND] = 0;
+		return;
+	}
+
+	if (coex_stat->wl_slot_extend && coex_stat->wl_force_lps_ctrl &&
+	    !coex_stat->wl_cck_lock_ever) {
+		if (coex_stat->wl_fw_dbg_info[7] <= 5)
+			coex_stat->cnt_wl[COEX_CNT_WL_5MS_NOEXTEND]++;
+		else
+			coex_stat->cnt_wl[COEX_CNT_WL_5MS_NOEXTEND] = 0;
+
+		if (coex_stat->cnt_wl[COEX_CNT_WL_5MS_NOEXTEND] == 7) {
+			para[1] = 0x1; /* disable 5ms extend */
+			rtw_fw_bt_wifi_control(rtwdev, para[0], &para[1]);
+			coex_stat->wl_slot_extend = false;
+			coex_stat->cnt_wl[COEX_CNT_WL_5MS_NOEXTEND] = 0;
+		}
+	} else if (!coex_stat->wl_slot_extend && coex_stat->wl_cck_lock) {
+		para[1] = 0x0; /* enable 5ms extend */
+		rtw_fw_bt_wifi_control(rtwdev, para[0], &para[1]);
+		coex_stat->wl_slot_extend = true;
+	}
+}
+
+static void rtw_coex_wl_ccklock_detect(struct rtw_dev *rtwdev)
+{
+	struct rtw_coex *coex = &rtwdev->coex;
+	struct rtw_coex_stat *coex_stat = &coex->stat;
+
+	/* TODO: wait for rx_rate_change_notify implement */
+	coex_stat->wl_cck_lock = false;
+	coex_stat->wl_cck_lock_pre = false;
+	coex_stat->wl_cck_lock_ever = false;
+}
+
+static void rtw_coex_wl_noisy_detect(struct rtw_dev *rtwdev)
+{
+	struct rtw_coex *coex = &rtwdev->coex;
+	struct rtw_coex_stat *coex_stat = &coex->stat;
+	struct rtw_dm_info *dm_info = &rtwdev->dm_info;
+	u32 cnt_cck;
+
+	/* wifi noisy environment identification */
+	cnt_cck = dm_info->cck_ok_cnt + dm_info->cck_err_cnt;
+
+	if (!coex_stat->wl_gl_busy) {
+		if (cnt_cck > 250) {
+			if (coex_stat->cnt_wl[COEX_CNT_WL_NOISY2] < 5)
+				coex_stat->cnt_wl[COEX_CNT_WL_NOISY2]++;
+
+			if (coex_stat->cnt_wl[COEX_CNT_WL_NOISY2] == 5) {
+				coex_stat->cnt_wl[COEX_CNT_WL_NOISY0] = 0;
+				coex_stat->cnt_wl[COEX_CNT_WL_NOISY1] = 0;
+			}
+		} else if (cnt_cck < 100) {
+			if (coex_stat->cnt_wl[COEX_CNT_WL_NOISY0] < 5)
+				coex_stat->cnt_wl[COEX_CNT_WL_NOISY0]++;
+
+			if (coex_stat->cnt_wl[COEX_CNT_WL_NOISY0] == 5) {
+				coex_stat->cnt_wl[COEX_CNT_WL_NOISY1] = 0;
+				coex_stat->cnt_wl[COEX_CNT_WL_NOISY2] = 0;
+			}
+		} else {
+			if (coex_stat->cnt_wl[COEX_CNT_WL_NOISY1] < 5)
+				coex_stat->cnt_wl[COEX_CNT_WL_NOISY1]++;
+
+			if (coex_stat->cnt_wl[COEX_CNT_WL_NOISY1] == 5) {
+				coex_stat->cnt_wl[COEX_CNT_WL_NOISY0] = 0;
+				coex_stat->cnt_wl[COEX_CNT_WL_NOISY2] = 0;
+			}
+		}
+
+		if (coex_stat->cnt_wl[COEX_CNT_WL_NOISY2] == 5)
+			coex_stat->wl_noisy_level = 2;
+		else if (coex_stat->cnt_wl[COEX_CNT_WL_NOISY1] == 5)
+			coex_stat->wl_noisy_level = 1;
+		else
+			coex_stat->wl_noisy_level = 0;
+	}
+}
+
+static void rtw_coex_tdma_timer_base(struct rtw_dev *rtwdev, u8 type)
+{
+	struct rtw_coex *coex = &rtwdev->coex;
+	struct rtw_coex_stat *coex_stat = &coex->stat;
+	u8 para[2] = {0};
+
+	if (coex_stat->tdma_timer_base == type)
+		return;
+
+	coex_stat->tdma_timer_base = type;
+
+	para[0] = COEX_H2C69_TDMA_SLOT;
+
+	if (type == 3) /* 4-slot  */
+		para[1] = PARA1_H2C69_TDMA_4SLOT; /* 4-slot */
+	else /* 2-slot  */
+		para[1] = PARA1_H2C69_TDMA_2SLOT;
+
+	rtw_fw_bt_wifi_control(rtwdev, para[0], &para[1]);
+
+	/* no 5ms_wl_slot_extend for 4-slot mode  */
+	if (coex_stat->tdma_timer_base == 3)
+		rtw_coex_wl_ccklock_action(rtwdev);
+}
+
+static void rtw_coex_set_wl_pri_mask(struct rtw_dev *rtwdev, u8 bitmap,
+				     u8 data)
+{
+	u32 addr;
+
+	addr = REG_BT_COEX_TABLE_H + (bitmap / 8);
+	bitmap = bitmap % 8;
+
+	rtw_write8_mask(rtwdev, addr, BIT(bitmap), data);
+}
+
+void rtw_coex_write_scbd(struct rtw_dev *rtwdev, u16 bitpos, bool set)
+{
+	struct rtw_chip_info *chip = rtwdev->chip;
+	struct rtw_coex *coex = &rtwdev->coex;
+	struct rtw_coex_stat *coex_stat = &coex->stat;
+	u16 val = 0x2;
+
+	if (!chip->scbd_support)
+		return;
+
+	val |= coex_stat->score_board;
+
+	/* for 8822b, scbd[10] is CQDDR on
+	 * for 8822c, scbd[10] is no fix 2M
+	 */
+	if (!chip->new_scbd10_def && (bitpos & COEX_SCBD_FIX2M)) {
+		if (set)
+			val &= ~COEX_SCBD_FIX2M;
+		else
+			val |= COEX_SCBD_FIX2M;
+	} else {
+		if (set)
+			val |= bitpos;
+		else
+			val &= ~bitpos;
+	}
+
+	if (val != coex_stat->score_board) {
+		coex_stat->score_board = val;
+		val |= BIT_BT_INT_EN;
+		rtw_write16(rtwdev, REG_WIFI_BT_INFO, val);
+	}
+}
+
+static u16 rtw_coex_read_scbd(struct rtw_dev *rtwdev)
+{
+	struct rtw_chip_info *chip = rtwdev->chip;
+
+	if (!chip->scbd_support)
+		return 0;
+
+	return (rtw_read16(rtwdev, REG_WIFI_BT_INFO)) & ~(BIT_BT_INT_EN);
+}
+
+static void rtw_coex_check_rfk(struct rtw_dev *rtwdev)
+{
+	struct rtw_chip_info *chip = rtwdev->chip;
+	struct rtw_coex *coex = &rtwdev->coex;
+	struct rtw_coex_stat *coex_stat = &coex->stat;
+	struct rtw_coex_rfe *coex_rfe = &coex->rfe;
+	u8 cnt = 0;
+	u32 wait_cnt;
+	bool btk, wlk;
+
+	if (coex_rfe->wlg_at_btg && chip->scbd_support &&
+	    coex_stat->bt_iqk_state != 0xff) {
+		wait_cnt = COEX_RFK_TIMEOUT / COEX_MIN_DELAY;
+		do {
+			/* BT RFK */
+			btk = !!(rtw_coex_read_scbd(rtwdev) & COEX_SCBD_BT_RFK);
+
+			/* WL RFK */
+			wlk = !!(rtw_read8(rtwdev, REG_ARFR4) & BIT_WL_RFK);
+
+			if (!btk && !wlk)
+				break;
+
+			mdelay(COEX_MIN_DELAY);
+		} while (++cnt < wait_cnt);
+
+		if (cnt >= wait_cnt)
+			coex_stat->bt_iqk_state = 0xff;
+	}
+}
+
+static void rtw_coex_query_bt_info(struct rtw_dev *rtwdev)
+{
+	struct rtw_coex *coex = &rtwdev->coex;
+	struct rtw_coex_stat *coex_stat = &coex->stat;
+
+	if (coex_stat->bt_disabled)
+		return;
+
+	rtw_fw_query_bt_info(rtwdev);
+}
+
+static void rtw_coex_monitor_bt_enable(struct rtw_dev *rtwdev)
+{
+	struct rtw_chip_info *chip = rtwdev->chip;
+	struct rtw_coex *coex = &rtwdev->coex;
+	struct rtw_coex_stat *coex_stat = &coex->stat;
+	struct rtw_coex_dm *coex_dm = &coex->dm;
+	bool bt_disabled = false;
+	u16 score_board;
+
+	if (chip->scbd_support) {
+		score_board = rtw_coex_read_scbd(rtwdev);
+		bt_disabled = !(score_board & COEX_SCBD_ONOFF);
+	}
+
+	if (coex_stat->bt_disabled != bt_disabled) {
+		rtw_dbg(rtwdev, RTW_DBG_COEX, "coex: BT state changed (%d) -> (%d)\n",
+			coex_stat->bt_disabled, bt_disabled);
+
+		coex_stat->bt_disabled = bt_disabled;
+		coex_stat->bt_ble_scan_type = 0;
+		coex_dm->cur_bt_lna_lvl = 0;
+	}
+
+	if (!coex_stat->bt_disabled) {
+		coex_stat->bt_reenable = true;
+		ieee80211_queue_delayed_work(rtwdev->hw,
+					     &coex->bt_reenable_work, 15 * HZ);
+	} else {
+		coex_stat->bt_mailbox_reply = false;
+		coex_stat->bt_reenable = false;
+	}
+}
+
+static void rtw_coex_update_wl_link_info(struct rtw_dev *rtwdev, u8 reason)
+{
+	struct rtw_coex *coex = &rtwdev->coex;
+	struct rtw_coex_stat *coex_stat = &coex->stat;
+	struct rtw_coex_dm *coex_dm = &coex->dm;
+	struct rtw_chip_info *chip = rtwdev->chip;
+	struct rtw_traffic_stats *stats = &rtwdev->stats;
+	bool is_5G = false;
+	bool scan = false, link = false;
+	int i;
+	u8 rssi_state;
+	u8 rssi_step;
+	u8 rssi;
+
+	scan = rtw_flag_check(rtwdev, RTW_FLAG_SCANNING);
+	coex_stat->wl_connected = !!rtwdev->sta_cnt;
+	coex_stat->wl_gl_busy = rtw_flag_check(rtwdev, RTW_FLAG_BUSY_TRAFFIC);
+
+	if (stats->tx_throughput > stats->rx_throughput)
+		coex_stat->wl_tput_dir = COEX_WL_TPUT_TX;
+	else
+		coex_stat->wl_tput_dir = COEX_WL_TPUT_RX;
+
+	if (scan || link || reason == COEX_RSN_2GCONSTART ||
+	    reason == COEX_RSN_2GSCANSTART || reason == COEX_RSN_2GSWITCHBAND)
+		coex_stat->wl_linkscan_proc = true;
+	else
+		coex_stat->wl_linkscan_proc = false;
+
+	rtw_coex_wl_noisy_detect(rtwdev);
+
+	for (i = 0; i < 4; i++) {
+		rssi_state = coex_dm->wl_rssi_state[i];
+		rssi_step = chip->wl_rssi_step[i];
+		rssi = rtwdev->dm_info.min_rssi;
+		rssi_state = rtw_coex_next_rssi_state(rtwdev, rssi_state,
+						      rssi, rssi_step);
+		coex_dm->wl_rssi_state[i] = rssi_state;
+	}
+
+	switch (reason) {
+	case COEX_RSN_5GSCANSTART:
+	case COEX_RSN_5GSWITCHBAND:
+	case COEX_RSN_5GCONSTART:
+
+		is_5G = true;
+		break;
+	case COEX_RSN_2GSCANSTART:
+	case COEX_RSN_2GSWITCHBAND:
+	case COEX_RSN_2GCONSTART:
+
+		is_5G = false;
+		break;
+	default:
+		if (rtwdev->hal.current_band_type == RTW_BAND_5G)
+			is_5G = true;
+		else
+			is_5G = false;
+		break;
+	}
+
+	coex->under_5g = is_5G;
+}
+
+static inline u8 *get_payload_from_coex_resp(struct sk_buff *resp)
+{
+	struct rtw_c2h_cmd *c2h;
+	u32 pkt_offset;
+
+	pkt_offset = *((u32 *)resp->cb);
+	c2h = (struct rtw_c2h_cmd *)(resp->data + pkt_offset);
+
+	return c2h->payload;
+}
+
+void rtw_coex_info_response(struct rtw_dev *rtwdev, struct sk_buff *skb)
+{
+	struct rtw_coex *coex = &rtwdev->coex;
+	u8 *payload = get_payload_from_coex_resp(skb);
+
+	if (payload[0] != COEX_RESP_ACK_BY_WL_FW)
+		return;
+
+	skb_queue_tail(&coex->queue, skb);
+	wake_up(&coex->wait);
+}
+
+static struct sk_buff *rtw_coex_info_request(struct rtw_dev *rtwdev,
+					     struct rtw_coex_info_req *req)
+{
+	struct rtw_coex *coex = &rtwdev->coex;
+	struct sk_buff *skb_resp = NULL;
+
+	mutex_lock(&coex->mutex);
+
+	rtw_fw_query_bt_mp_info(rtwdev, req);
+
+	if (!wait_event_timeout(coex->wait, !skb_queue_empty(&coex->queue),
+				COEX_REQUEST_TIMEOUT)) {
+		rtw_err(rtwdev, "coex request time out\n");
+		goto out;
+	}
+
+	skb_resp = skb_dequeue(&coex->queue);
+	if (!skb_resp) {
+		rtw_err(rtwdev, "failed to get coex info response\n");
+		goto out;
+	}
+
+out:
+	mutex_unlock(&coex->mutex);
+	return skb_resp;
+}
+
+static bool rtw_coex_get_bt_scan_type(struct rtw_dev *rtwdev, u8 *scan_type)
+{
+	struct rtw_coex_info_req req = {0};
+	struct sk_buff *skb;
+	u8 *payload;
+	bool ret = false;
+
+	req.op_code = BT_MP_INFO_OP_SCAN_TYPE;
+	skb = rtw_coex_info_request(rtwdev, &req);
+	if (!skb)
+		goto out;
+
+	payload = get_payload_from_coex_resp(skb);
+	*scan_type = GET_COEX_RESP_BT_SCAN_TYPE(payload);
+	dev_kfree_skb_any(skb);
+	ret = true;
+
+out:
+	return ret;
+}
+
+static bool rtw_coex_set_lna_constrain_level(struct rtw_dev *rtwdev,
+					     u8 lna_constrain_level)
+{
+	struct rtw_coex_info_req req = {0};
+	struct sk_buff *skb;
+	bool ret = false;
+
+	req.op_code = BT_MP_INFO_OP_LNA_CONSTRAINT;
+	req.para1 = lna_constrain_level;
+	skb = rtw_coex_info_request(rtwdev, &req);
+	if (!skb)
+		goto out;
+
+	dev_kfree_skb_any(skb);
+	ret = true;
+
+out:
+	return ret;
+}
+
+static void rtw_coex_update_bt_link_info(struct rtw_dev *rtwdev)
+{
+	struct rtw_coex *coex = &rtwdev->coex;
+	struct rtw_coex_stat *coex_stat = &coex->stat;
+	struct rtw_coex_dm *coex_dm = &coex->dm;
+	struct rtw_chip_info *chip = rtwdev->chip;
+	u8 i;
+	u8 rssi_state;
+	u8 rssi_step;
+	u8 rssi;
+
+	/* update wl/bt rssi by btinfo */
+	for (i = 0; i < COEX_RSSI_STEP; i++) {
+		rssi_state = coex_dm->bt_rssi_state[i];
+		rssi_step = chip->bt_rssi_step[i];
+		rssi = coex_stat->bt_rssi;
+		rssi_state = rtw_coex_next_rssi_state(rtwdev, rssi_state,
+						      rssi, rssi_step);
+		coex_dm->bt_rssi_state[i] = rssi_state;
+	}
+
+	for (i = 0; i < COEX_RSSI_STEP; i++) {
+		rssi_state = coex_dm->wl_rssi_state[i];
+		rssi_step = chip->wl_rssi_step[i];
+		rssi = rtwdev->dm_info.min_rssi;
+		rssi_state = rtw_coex_next_rssi_state(rtwdev, rssi_state,
+						      rssi, rssi_step);
+		coex_dm->wl_rssi_state[i] = rssi_state;
+	}
+
+	if (coex_stat->bt_ble_scan_en &&
+	    coex_stat->cnt_bt[COEX_CNT_BT_INFOUPDATE] % 3 == 0) {
+		u8 scan_type;
+
+		if (rtw_coex_get_bt_scan_type(rtwdev, &scan_type)) {
+			coex_stat->bt_ble_scan_type = scan_type;
+			if ((coex_stat->bt_ble_scan_type & 0x1) == 0x1)
+				coex_stat->bt_init_scan = true;
+			else
+				coex_stat->bt_init_scan = false;
+		}
+	}
+
+	coex_stat->bt_profile_num = 0;
+
+	/* set link exist status */
+	if (!(coex_stat->bt_info_lb2 & COEX_INFO_CONNECTION)) {
+		coex_stat->bt_link_exist = false;
+		coex_stat->bt_pan_exist = false;
+		coex_stat->bt_a2dp_exist = false;
+		coex_stat->bt_hid_exist = false;
+		coex_stat->bt_hfp_exist = false;
+	} else {
+		/* connection exists */
+		coex_stat->bt_link_exist = true;
+		if (coex_stat->bt_info_lb2 & COEX_INFO_FTP) {
+			coex_stat->bt_pan_exist = true;
+			coex_stat->bt_profile_num++;
+		} else {
+			coex_stat->bt_pan_exist = false;
+		}
+
+		if (coex_stat->bt_info_lb2 & COEX_INFO_A2DP) {
+			coex_stat->bt_a2dp_exist = true;
+			coex_stat->bt_profile_num++;
+		} else {
+			coex_stat->bt_a2dp_exist = false;
+		}
+
+		if (coex_stat->bt_info_lb2 & COEX_INFO_HID) {
+			coex_stat->bt_hid_exist = true;
+			coex_stat->bt_profile_num++;
+		} else {
+			coex_stat->bt_hid_exist = false;
+		}
+
+		if (coex_stat->bt_info_lb2 & COEX_INFO_SCO_ESCO) {
+			coex_stat->bt_hfp_exist = true;
+			coex_stat->bt_profile_num++;
+		} else {
+			coex_stat->bt_hfp_exist = false;
+		}
+	}
+
+	if (coex_stat->bt_info_lb2 & COEX_INFO_INQ_PAGE) {
+		coex_dm->bt_status = COEX_BTSTATUS_INQ_PAGE;
+	} else if (!(coex_stat->bt_info_lb2 & COEX_INFO_CONNECTION)) {
+		coex_dm->bt_status = COEX_BTSTATUS_NCON_IDLE;
+	} else if (coex_stat->bt_info_lb2 == COEX_INFO_CONNECTION) {
+		coex_dm->bt_status = COEX_BTSTATUS_CON_IDLE;
+	} else if ((coex_stat->bt_info_lb2 & COEX_INFO_SCO_ESCO) ||
+		   (coex_stat->bt_info_lb2 & COEX_INFO_SCO_BUSY)) {
+		if (coex_stat->bt_info_lb2 & COEX_INFO_ACL_BUSY)
+			coex_dm->bt_status = COEX_BTSTATUS_ACL_SCO_BUSY;
+		else
+			coex_dm->bt_status = COEX_BTSTATUS_SCO_BUSY;
+	} else if (coex_stat->bt_info_lb2 & COEX_INFO_ACL_BUSY) {
+		coex_dm->bt_status = COEX_BTSTATUS_ACL_BUSY;
+	} else {
+		coex_dm->bt_status = COEX_BTSTATUS_MAX;
+	}
+
+	coex_stat->cnt_bt[COEX_CNT_BT_INFOUPDATE]++;
+
+	rtw_dbg(rtwdev, RTW_DBG_COEX, "coex: bt status(%d)\n", coex_dm->bt_status);
+}
+
+static void rtw_coex_update_wl_ch_info(struct rtw_dev *rtwdev, u8 type)
+{
+	struct rtw_chip_info *chip = rtwdev->chip;
+	struct rtw_coex_dm *coex_dm = &rtwdev->coex.dm;
+	struct rtw_efuse *efuse = &rtwdev->efuse;
+	u8 link = 0;
+	u8 center_chan = 0;
+	u8 bw;
+	int i;
+
+	bw = rtwdev->hal.current_band_width;
+
+	if (type != COEX_MEDIA_DISCONNECT)
+		center_chan = rtwdev->hal.current_channel;
+
+	if (center_chan == 0 || (efuse->share_ant && center_chan <= 14)) {
+		link = 0;
+	} else if (center_chan <= 14) {
+		link = 0x1;
+
+		if (bw == RTW_CHANNEL_WIDTH_40)
+			bw = chip->bt_afh_span_bw40;
+		else
+			bw = chip->bt_afh_span_bw20;
+	} else if (chip->afh_5g_num > 1) {
+		for (i = 0; i < chip->afh_5g_num; i++) {
+			if (center_chan == chip->afh_5g[i].wl_5g_ch) {
+				link = 0x3;
+				center_chan = chip->afh_5g[i].bt_skip_ch;
+				bw = chip->afh_5g[i].bt_skip_span;
+				break;
+			}
+		}
+	}
+
+	coex_dm->wl_ch_info[0] = link;
+	coex_dm->wl_ch_info[1] = center_chan;
+	coex_dm->wl_ch_info[2] = bw;
+
+	rtw_fw_wl_ch_info(rtwdev, link, center_chan, bw);
+}
+
+static void rtw_coex_set_bt_tx_power(struct rtw_dev *rtwdev, u8 bt_pwr_dec_lvl)
+{
+	struct rtw_coex *coex = &rtwdev->coex;
+	struct rtw_coex_dm *coex_dm = &coex->dm;
+
+	if (bt_pwr_dec_lvl == coex_dm->cur_bt_pwr_lvl)
+		return;
+
+	coex_dm->cur_bt_pwr_lvl = bt_pwr_dec_lvl;
+
+	rtw_fw_force_bt_tx_power(rtwdev, bt_pwr_dec_lvl);
+}
+
+static void rtw_coex_set_bt_rx_gain(struct rtw_dev *rtwdev, u8 bt_lna_lvl)
+{
+	struct rtw_coex *coex = &rtwdev->coex;
+	struct rtw_coex_dm *coex_dm = &coex->dm;
+
+	if (bt_lna_lvl == coex_dm->cur_bt_lna_lvl)
+		return;
+
+	coex_dm->cur_bt_lna_lvl = bt_lna_lvl;
+
+	/* notify BT rx gain table changed */
+	if (bt_lna_lvl < 7) {
+		rtw_coex_set_lna_constrain_level(rtwdev, bt_lna_lvl);
+		rtw_coex_write_scbd(rtwdev, COEX_SCBD_RXGAIN, true);
+	} else {
+		rtw_coex_write_scbd(rtwdev, COEX_SCBD_RXGAIN, false);
+	}
+}
+
+static void rtw_coex_set_rf_para(struct rtw_dev *rtwdev,
+				 struct coex_rf_para para)
+{
+	struct rtw_coex *coex = &rtwdev->coex;
+	struct rtw_coex_stat *coex_stat = &coex->stat;
+	u8 offset = 0;
+
+	if (coex->freerun && coex_stat->wl_noisy_level <= 1)
+		offset = 3;
+
+	rtw_coex_set_wl_tx_power(rtwdev, para.wl_pwr_dec_lvl);
+	rtw_coex_set_bt_tx_power(rtwdev, para.bt_pwr_dec_lvl + offset);
+	rtw_coex_set_wl_rx_gain(rtwdev, para.wl_low_gain_en);
+	rtw_coex_set_bt_rx_gain(rtwdev, para.bt_lna_lvl);
+}
+
+static u32 rtw_coex_read_indirect_reg(struct rtw_dev *rtwdev, u16 addr)
+{
+	u32 val;
+
+	if (!ltecoex_read_reg(rtwdev, addr, &val)) {
+		rtw_err(rtwdev, "failed to read indirect register\n");
+		return 0;
+	}
+
+	return val;
+}
+
+void rtw_coex_write_indirect_reg(struct rtw_dev *rtwdev, u16 addr,
+				 u32 mask, u32 val)
+{
+	u32 shift = __ffs(mask);
+	u32 tmp;
+
+	tmp = rtw_coex_read_indirect_reg(rtwdev, addr);
+	tmp = (tmp & (~mask)) | ((val << shift) & mask);
+
+	if (!ltecoex_reg_write(rtwdev, addr, tmp))
+		rtw_err(rtwdev, "failed to write indirect register\n");
+}
+
+static void rtw_coex_coex_ctrl_owner(struct rtw_dev *rtwdev, bool wifi_control)
+{
+	if (wifi_control)
+		rtw_write32_set(rtwdev, REG_SYS_SDIO_CTRL, BIT_LTE_MUX_CTRL_PATH);
+	else
+		rtw_write32_clr(rtwdev, REG_SYS_SDIO_CTRL, BIT_LTE_MUX_CTRL_PATH);
+}
+
+static void rtw_coex_set_gnt_bt(struct rtw_dev *rtwdev, u8 state)
+{
+	rtw_coex_write_indirect_reg(rtwdev, 0x38, 0xc000, state);
+	rtw_coex_write_indirect_reg(rtwdev, 0x38, 0x0c00, state);
+}
+
+static void rtw_coex_set_gnt_wl(struct rtw_dev *rtwdev, u8 state)
+{
+	rtw_coex_write_indirect_reg(rtwdev, 0x38, 0x3000, state);
+	rtw_coex_write_indirect_reg(rtwdev, 0x38, 0x0300, state);
+}
+
+static void rtw_coex_set_table(struct rtw_dev *rtwdev, u32 table0, u32 table1)
+{
+#define DEF_BRK_TABLE_VAL	0xf0ffffff
+	rtw_write32(rtwdev, REG_BT_COEX_TABLE0, table0);
+	rtw_write32(rtwdev, REG_BT_COEX_TABLE1, table1);
+	rtw_write32(rtwdev, REG_BT_COEX_BRK_TABLE, DEF_BRK_TABLE_VAL);
+}
+
+static void rtw_coex_table(struct rtw_dev *rtwdev, u8 type)
+{
+	struct rtw_coex *coex = &rtwdev->coex;
+	struct rtw_coex_dm *coex_dm = &coex->dm;
+	struct rtw_chip_info *chip = rtwdev->chip;
+	struct rtw_efuse *efuse = &rtwdev->efuse;
+
+	coex_dm->cur_table = type;
+
+	if (efuse->share_ant) {
+		if (type < chip->table_sant_num)
+			rtw_coex_set_table(rtwdev,
+					   chip->table_sant[type].bt,
+					   chip->table_sant[type].wl);
+	} else {
+		type = type - 100;
+		if (type < chip->table_nsant_num)
+			rtw_coex_set_table(rtwdev,
+					   chip->table_nsant[type].bt,
+					   chip->table_nsant[type].wl);
+	}
+}
+
+static void rtw_coex_ignore_wlan_act(struct rtw_dev *rtwdev, bool enable)
+{
+	struct rtw_coex *coex = &rtwdev->coex;
+
+	if (coex->stop_dm)
+		return;
+
+	rtw_fw_bt_ignore_wlan_action(rtwdev, enable);
+}
+
+static void rtw_coex_power_save_state(struct rtw_dev *rtwdev, u8 ps_type,
+				      u8 lps_val, u8 rpwm_val)
+{
+	struct rtw_lps_conf *lps_conf = &rtwdev->lps_conf;
+	struct rtw_vif *rtwvif;
+	struct rtw_coex *coex = &rtwdev->coex;
+	struct rtw_coex_stat *coex_stat = &coex->stat;
+	u8 lps_mode = 0x0;
+
+	lps_mode = rtwdev->lps_conf.mode;
+
+	switch (ps_type) {
+	case COEX_PS_WIFI_NATIVE:
+		/* recover to original 32k low power setting */
+		coex_stat->wl_force_lps_ctrl = false;
+
+		rtwvif = lps_conf->rtwvif;
+		if (rtwvif && rtw_in_lps(rtwdev))
+			rtw_leave_lps(rtwdev, rtwvif);
+		break;
+	case COEX_PS_LPS_OFF:
+		coex_stat->wl_force_lps_ctrl = true;
+		if (lps_mode)
+			rtw_fw_coex_tdma_type(rtwdev, 0x8, 0, 0, 0, 0);
+
+		rtwvif = lps_conf->rtwvif;
+		if (rtwvif && rtw_in_lps(rtwdev))
+			rtw_leave_lps(rtwdev, rtwvif);
+		break;
+	default:
+		break;
+	}
+}
+
+static void rtw_coex_set_tdma(struct rtw_dev *rtwdev, u8 byte1, u8 byte2,
+			      u8 byte3, u8 byte4, u8 byte5)
+{
+	struct rtw_coex *coex = &rtwdev->coex;
+	struct rtw_coex_dm *coex_dm = &coex->dm;
+	struct rtw_chip_info *chip = rtwdev->chip;
+	u8 ps_type = COEX_PS_WIFI_NATIVE;
+	bool ap_enable = false;
+
+	if (ap_enable && (byte1 & BIT(4) && !(byte1 & BIT(5)))) {
+		byte1 &= ~BIT(4);
+		byte1 |= BIT(5);
+
+		byte5 |= BIT(5);
+		byte5 &= ~BIT(6);
+
+		ps_type = COEX_PS_WIFI_NATIVE;
+		rtw_coex_power_save_state(rtwdev, ps_type, 0x0, 0x0);
+	} else if (byte1 & BIT(4) && !(byte1 & BIT(5))) {
+		if (chip->pstdma_type == COEX_PSTDMA_FORCE_LPSOFF)
+			ps_type = COEX_PS_LPS_OFF;
+		else
+			ps_type = COEX_PS_LPS_ON;
+		rtw_coex_power_save_state(rtwdev, ps_type, 0x50, 0x4);
+	} else {
+		ps_type = COEX_PS_WIFI_NATIVE;
+		rtw_coex_power_save_state(rtwdev, ps_type, 0x0, 0x0);
+	}
+
+	coex_dm->ps_tdma_para[0] = byte1;
+	coex_dm->ps_tdma_para[1] = byte2;
+	coex_dm->ps_tdma_para[2] = byte3;
+	coex_dm->ps_tdma_para[3] = byte4;
+	coex_dm->ps_tdma_para[4] = byte5;
+
+	rtw_fw_coex_tdma_type(rtwdev, byte1, byte2, byte3, byte4, byte5);
+}
+
+static void rtw_coex_tdma(struct rtw_dev *rtwdev, bool force, u32 tcase)
+{
+	struct rtw_coex *coex = &rtwdev->coex;
+	struct rtw_coex_dm *coex_dm = &coex->dm;
+	struct rtw_chip_info *chip = rtwdev->chip;
+	struct rtw_efuse *efuse = &rtwdev->efuse;
+	u8 n, type;
+	bool turn_on;
+
+	if (tcase & TDMA_4SLOT)/* 4-slot (50ms) mode */
+		rtw_coex_tdma_timer_base(rtwdev, 3);
+	else
+		rtw_coex_tdma_timer_base(rtwdev, 0);
+
+	type = (u8)(tcase & 0xff);
+
+	turn_on = (type == 0 || type == 100) ? false : true;
+
+	if (!force) {
+		if (turn_on == coex_dm->cur_ps_tdma_on &&
+		    type == coex_dm->cur_ps_tdma) {
+			return;
+		}
+	}
+
+	if (turn_on) {
+		/* enable TBTT interrupt */
+		rtw_write8_set(rtwdev, REG_BCN_CTRL, BIT_EN_BCN_FUNCTION);
+		rtw_coex_write_scbd(rtwdev, COEX_SCBD_TDMA, true);
+	} else {
+		rtw_coex_write_scbd(rtwdev, COEX_SCBD_TDMA, false);
+	}
+
+	if (efuse->share_ant) {
+		if (type < chip->tdma_sant_num)
+			rtw_coex_set_tdma(rtwdev,
+					  chip->tdma_sant[type].para[0],
+					  chip->tdma_sant[type].para[1],
+					  chip->tdma_sant[type].para[2],
+					  chip->tdma_sant[type].para[3],
+					  chip->tdma_sant[type].para[4]);
+	} else {
+		n = type - 100;
+		if (n < chip->tdma_nsant_num)
+			rtw_coex_set_tdma(rtwdev,
+					  chip->tdma_nsant[n].para[0],
+					  chip->tdma_nsant[n].para[1],
+					  chip->tdma_nsant[n].para[2],
+					  chip->tdma_nsant[n].para[3],
+					  chip->tdma_nsant[n].para[4]);
+	}
+
+	/* update pre state */
+	coex_dm->cur_ps_tdma_on = turn_on;
+	coex_dm->cur_ps_tdma = type;
+
+	rtw_dbg(rtwdev, RTW_DBG_COEX, "coex: coex tdma type (%d)\n", type);
+}
+
+static void rtw_coex_set_ant_path(struct rtw_dev *rtwdev, bool force, u8 phase)
+{
+	struct rtw_coex *coex = &rtwdev->coex;
+	struct rtw_coex_stat *coex_stat = &coex->stat;
+	struct rtw_coex_dm *coex_dm = &coex->dm;
+	u8 ctrl_type = COEX_SWITCH_CTRL_MAX;
+	u8 pos_type = COEX_SWITCH_TO_MAX;
+
+	if (!force && coex_dm->cur_ant_pos_type == phase)
+		return;
+
+	coex_dm->cur_ant_pos_type = phase;
+
+	/* avoid switch coex_ctrl_owner during BT IQK */
+	rtw_coex_check_rfk(rtwdev);
+
+	switch (phase) {
+	case COEX_SET_ANT_POWERON:
+		/* set path control owner to BT at power-on */
+		if (coex_stat->bt_disabled)
+			rtw_coex_coex_ctrl_owner(rtwdev, true);
+		else
+			rtw_coex_coex_ctrl_owner(rtwdev, false);
+
+		ctrl_type = COEX_SWITCH_CTRL_BY_BBSW;
+		pos_type = COEX_SWITCH_TO_BT;
+		break;
+	case COEX_SET_ANT_INIT:
+		if (coex_stat->bt_disabled) {
+			/* set GNT_BT to SW low */
+			rtw_coex_set_gnt_bt(rtwdev, COEX_GNT_SET_SW_LOW);
+
+			/* set GNT_WL to SW high */
+			rtw_coex_set_gnt_wl(rtwdev, COEX_GNT_SET_SW_HIGH);
+		} else {
+			/* set GNT_BT to SW high */
+			rtw_coex_set_gnt_bt(rtwdev, COEX_GNT_SET_SW_HIGH);
+
+			/* set GNT_WL to SW low */
+			rtw_coex_set_gnt_wl(rtwdev, COEX_GNT_SET_SW_LOW);
+		}
+
+		/* set path control owner to wl at initial step */
+		rtw_coex_coex_ctrl_owner(rtwdev, true);
+
+		ctrl_type = COEX_SWITCH_CTRL_BY_BBSW;
+		pos_type = COEX_SWITCH_TO_BT;
+		break;
+	case COEX_SET_ANT_WONLY:
+		/* set GNT_BT to SW Low */
+		rtw_coex_set_gnt_bt(rtwdev, COEX_GNT_SET_SW_LOW);
+
+		/* Set GNT_WL to SW high */
+		rtw_coex_set_gnt_wl(rtwdev, COEX_GNT_SET_SW_HIGH);
+
+		/* set path control owner to wl at initial step */
+		rtw_coex_coex_ctrl_owner(rtwdev, true);
+
+		ctrl_type = COEX_SWITCH_CTRL_BY_BBSW;
+		pos_type = COEX_SWITCH_TO_WLG;
+		break;
+	case COEX_SET_ANT_WOFF:
+		/* set path control owner to BT */
+		rtw_coex_coex_ctrl_owner(rtwdev, false);
+
+		ctrl_type = COEX_SWITCH_CTRL_BY_BT;
+		pos_type = COEX_SWITCH_TO_NOCARE;
+		break;
+	case COEX_SET_ANT_2G:
+		/* set GNT_BT to PTA */
+		rtw_coex_set_gnt_bt(rtwdev, COEX_GNT_SET_HW_PTA);
+
+		/* set GNT_WL to PTA */
+		rtw_coex_set_gnt_wl(rtwdev, COEX_GNT_SET_HW_PTA);
+
+		/* set path control owner to wl at runtime step */
+		rtw_coex_coex_ctrl_owner(rtwdev, true);
+
+		ctrl_type = COEX_SWITCH_CTRL_BY_PTA;
+		pos_type = COEX_SWITCH_TO_NOCARE;
+		break;
+	case COEX_SET_ANT_5G:
+		/* set GNT_BT to PTA */
+		rtw_coex_set_gnt_bt(rtwdev, COEX_GNT_SET_SW_HIGH);
+
+		/* set GNT_WL to SW high */
+		rtw_coex_set_gnt_wl(rtwdev, COEX_GNT_SET_SW_HIGH);
+
+		/* set path control owner to wl at runtime step */
+		rtw_coex_coex_ctrl_owner(rtwdev, true);
+
+		ctrl_type = COEX_SWITCH_CTRL_BY_BBSW;
+		pos_type = COEX_SWITCH_TO_WLA;
+		break;
+	case COEX_SET_ANT_2G_FREERUN:
+		/* set GNT_BT to SW high */
+		rtw_coex_set_gnt_bt(rtwdev, COEX_GNT_SET_SW_HIGH);
+
+		/* Set GNT_WL to SW high */
+		rtw_coex_set_gnt_wl(rtwdev, COEX_GNT_SET_SW_HIGH);
+
+		/* set path control owner to wl at runtime step */
+		rtw_coex_coex_ctrl_owner(rtwdev, true);
+
+		ctrl_type = COEX_SWITCH_CTRL_BY_BBSW;
+		pos_type = COEX_SWITCH_TO_WLG_BT;
+		break;
+	case COEX_SET_ANT_2G_WLBT:
+		/* set GNT_BT to SW high */
+		rtw_coex_set_gnt_bt(rtwdev, COEX_GNT_SET_HW_PTA);
+
+		/* Set GNT_WL to SW high */
+		rtw_coex_set_gnt_wl(rtwdev, COEX_GNT_SET_HW_PTA);
+
+		/* set path control owner to wl at runtime step */
+		rtw_coex_coex_ctrl_owner(rtwdev, true);
+
+		ctrl_type = COEX_SWITCH_CTRL_BY_BBSW;
+		pos_type = COEX_SWITCH_TO_WLG_BT;
+		break;
+	default:
+		WARN_ON("unknown phase when setting antenna path\n");
+		return;
+	}
+
+	if (ctrl_type < COEX_SWITCH_CTRL_MAX && pos_type < COEX_SWITCH_TO_MAX)
+		rtw_coex_set_ant_switch(rtwdev, ctrl_type, pos_type);
+}
+
+static u8 rtw_coex_algorithm(struct rtw_dev *rtwdev)
+{
+	struct rtw_coex *coex = &rtwdev->coex;
+	struct rtw_coex_stat *coex_stat = &coex->stat;
+	u8 algorithm = COEX_ALGO_NOPROFILE;
+	u8 profile_map = 0;
+
+	if (coex_stat->bt_hfp_exist)
+		profile_map |= BPM_HFP;
+	if (coex_stat->bt_hid_exist)
+		profile_map |= BPM_HID;
+	if (coex_stat->bt_a2dp_exist)
+		profile_map |= BPM_A2DP;
+	if (coex_stat->bt_pan_exist)
+		profile_map |= BPM_PAN;
+
+	switch (profile_map) {
+	case BPM_HFP:
+		algorithm = COEX_ALGO_HFP;
+		break;
+	case           BPM_HID:
+	case BPM_HFP + BPM_HID:
+		algorithm = COEX_ALGO_HID;
+		break;
+	case BPM_HFP           + BPM_A2DP:
+	case           BPM_HID + BPM_A2DP:
+	case BPM_HFP + BPM_HID + BPM_A2DP:
+		algorithm = COEX_ALGO_A2DP_HID;
+		break;
+	case BPM_HFP                      + BPM_PAN:
+	case           BPM_HID            + BPM_PAN:
+	case BPM_HFP + BPM_HID            + BPM_PAN:
+		algorithm = COEX_ALGO_PAN_HID;
+		break;
+	case BPM_HFP           + BPM_A2DP + BPM_PAN:
+	case           BPM_HID + BPM_A2DP + BPM_PAN:
+	case BPM_HFP + BPM_HID + BPM