ath9k_hw: Add MCI h/w code and state machine

Cc: Wilson Tsao <wtsao@qca.qualcomm.com>
Cc: Senthil Balasubramanian <senthilb@qca.qualcomm.com>
Signed-off-by: Rajkumar Manoharan <rmanohar@qca.qualcomm.com>
Signed-off-by: Mohammed Shafi Shajakhan <mohammed@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath/ath9k/Makefile

@@ -34,7 +34,8 @@ ath9k_hw-y:=	\
 		ar9002_mac.o \
 		ar9003_mac.o \
 		ar9003_eeprom.o \
-		ar9003_paprd.o
+		ar9003_paprd.o \
+		ar9003_mci.o
 
 obj-$(CONFIG_ATH9K_HW) += ath9k_hw.o
 

drivers/net/wireless/ath/ath9k/ar9003_mci.c

+/*
+ * Copyright (c) 2008-2011 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/export.h>
+#include "hw.h"
+#include "ar9003_phy.h"
+#include "ar9003_mci.h"
+
+static void ar9003_mci_reset_req_wakeup(struct ath_hw *ah)
+{
+	if (!AR_SREV_9462_20(ah))
+		return;
+
+	REG_RMW_FIELD(ah, AR_MCI_COMMAND2,
+		      AR_MCI_COMMAND2_RESET_REQ_WAKEUP, 1);
+	udelay(1);
+	REG_RMW_FIELD(ah, AR_MCI_COMMAND2,
+		      AR_MCI_COMMAND2_RESET_REQ_WAKEUP, 0);
+}
+
+static int ar9003_mci_wait_for_interrupt(struct ath_hw *ah, u32 address,
+					u32 bit_position, int time_out)
+{
+	struct ath_common *common = ath9k_hw_common(ah);
+
+	while (time_out) {
+
+		if (REG_READ(ah, address) & bit_position) {
+
+			REG_WRITE(ah, address, bit_position);
+
+			if (address == AR_MCI_INTERRUPT_RX_MSG_RAW) {
+
+				if (bit_position &
+				    AR_MCI_INTERRUPT_RX_MSG_REQ_WAKE)
+					ar9003_mci_reset_req_wakeup(ah);
+
+				if (bit_position &
+				    (AR_MCI_INTERRUPT_RX_MSG_SYS_SLEEPING |
+				     AR_MCI_INTERRUPT_RX_MSG_SYS_WAKING))
+					REG_WRITE(ah, AR_MCI_INTERRUPT_RAW,
+					AR_MCI_INTERRUPT_REMOTE_SLEEP_UPDATE);
+
+				REG_WRITE(ah, AR_MCI_INTERRUPT_RAW,
+					  AR_MCI_INTERRUPT_RX_MSG);
+			}
+			break;
+		}
+
+		udelay(10);
+		time_out -= 10;
+
+		if (time_out < 0)
+			break;
+	}
+
+	if (time_out <= 0) {
+		ath_dbg(common, ATH_DBG_MCI,
+			"MCI Wait for Reg 0x%08x = 0x%08x timeout.\n",
+			address, bit_position);
+		ath_dbg(common, ATH_DBG_MCI,
+			"MCI INT_RAW = 0x%08x, RX_MSG_RAW = 0x%08x",
+			REG_READ(ah, AR_MCI_INTERRUPT_RAW),
+			REG_READ(ah, AR_MCI_INTERRUPT_RX_MSG_RAW));
+		time_out = 0;
+	}
+
+	return time_out;
+}
+
+void ar9003_mci_remote_reset(struct ath_hw *ah, bool wait_done)
+{
+	u32 payload[4] = { 0xffffffff, 0xffffffff, 0xffffffff, 0xffffff00};
+
+	ar9003_mci_send_message(ah, MCI_REMOTE_RESET, 0, payload, 16,
+				wait_done, false);
+	udelay(5);
+}
+
+void ar9003_mci_send_lna_transfer(struct ath_hw *ah, bool wait_done)
+{
+	u32 payload = 0x00000000;
+
+	ar9003_mci_send_message(ah, MCI_LNA_TRANS, 0, &payload, 1,
+				wait_done, false);
+}
+
+static void ar9003_mci_send_req_wake(struct ath_hw *ah, bool wait_done)
+{
+	ar9003_mci_send_message(ah, MCI_REQ_WAKE, MCI_FLAG_DISABLE_TIMESTAMP,
+				NULL, 0, wait_done, false);
+	udelay(5);
+}
+
+void ar9003_mci_send_sys_waking(struct ath_hw *ah, bool wait_done)
+{
+	ar9003_mci_send_message(ah, MCI_SYS_WAKING, MCI_FLAG_DISABLE_TIMESTAMP,
+				NULL, 0, wait_done, false);
+}
+
+static void ar9003_mci_send_lna_take(struct ath_hw *ah, bool wait_done)
+{
+	u32 payload = 0x70000000;
+
+	ar9003_mci_send_message(ah, MCI_LNA_TAKE, 0, &payload, 1,
+				wait_done, false);
+}
+
+static void ar9003_mci_send_sys_sleeping(struct ath_hw *ah, bool wait_done)
+{
+	ar9003_mci_send_message(ah, MCI_SYS_SLEEPING,
+				MCI_FLAG_DISABLE_TIMESTAMP,
+				NULL, 0, wait_done, false);
+}
+
+static void ar9003_mci_send_coex_version_query(struct ath_hw *ah,
+					       bool wait_done)
+{
+	struct ath_common *common = ath9k_hw_common(ah);
+	struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
+	u32 payload[4] = {0, 0, 0, 0};
+
+	if (!mci->bt_version_known &&
+			(mci->bt_state != MCI_BT_SLEEP)) {
+		ath_dbg(common, ATH_DBG_MCI, "MCI Send Coex version query\n");
+		MCI_GPM_SET_TYPE_OPCODE(payload,
+				MCI_GPM_COEX_AGENT, MCI_GPM_COEX_VERSION_QUERY);
+		ar9003_mci_send_message(ah, MCI_GPM, 0, payload, 16,
+				wait_done, true);
+	}
+}
+
+static void ar9003_mci_send_coex_version_response(struct ath_hw *ah,
+						     bool wait_done)
+{
+	struct ath_common *common = ath9k_hw_common(ah);
+	struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
+	u32 payload[4] = {0, 0, 0, 0};
+
+	ath_dbg(common, ATH_DBG_MCI, "MCI Send Coex version response\n");
+	MCI_GPM_SET_TYPE_OPCODE(payload, MCI_GPM_COEX_AGENT,
+			MCI_GPM_COEX_VERSION_RESPONSE);
+	*(((u8 *)payload) + MCI_GPM_COEX_B_MAJOR_VERSION) =
+		mci->wlan_ver_major;
+	*(((u8 *)payload) + MCI_GPM_COEX_B_MINOR_VERSION) =
+		mci->wlan_ver_minor;
+	ar9003_mci_send_message(ah, MCI_GPM, 0, payload, 16, wait_done, true);
+}
+
+static void ar9003_mci_send_coex_wlan_channels(struct ath_hw *ah,
+						  bool wait_done)
+{
+	struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
+	u32 *payload = &mci->wlan_channels[0];
+
+	if ((mci->wlan_channels_update == true) &&
+			(mci->bt_state != MCI_BT_SLEEP)) {
+		MCI_GPM_SET_TYPE_OPCODE(payload,
+		MCI_GPM_COEX_AGENT, MCI_GPM_COEX_WLAN_CHANNELS);
+		ar9003_mci_send_message(ah, MCI_GPM, 0, payload, 16,
+					wait_done, true);
+		MCI_GPM_SET_TYPE_OPCODE(payload, 0xff, 0xff);
+	}
+}
+
+static void ar9003_mci_send_coex_bt_status_query(struct ath_hw *ah,
+						bool wait_done, u8 query_type)
+{
+	struct ath_common *common = ath9k_hw_common(ah);
+	struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
+	u32 payload[4] = {0, 0, 0, 0};
+	bool query_btinfo = !!(query_type & (MCI_GPM_COEX_QUERY_BT_ALL_INFO |
+					     MCI_GPM_COEX_QUERY_BT_TOPOLOGY));
+
+	if (mci->bt_state != MCI_BT_SLEEP) {
+
+		ath_dbg(common, ATH_DBG_MCI,
+			"MCI Send Coex BT Status Query 0x%02X\n", query_type);
+
+		MCI_GPM_SET_TYPE_OPCODE(payload,
+				MCI_GPM_COEX_AGENT, MCI_GPM_COEX_STATUS_QUERY);
+
+		*(((u8 *)payload) + MCI_GPM_COEX_B_BT_BITMAP) = query_type;
+		/*
+		 * If bt_status_query message is  not sent successfully,
+		 * then need_flush_btinfo should be set again.
+		 */
+		if (!ar9003_mci_send_message(ah, MCI_GPM, 0, payload, 16,
+					     wait_done, true)) {
+			if (query_btinfo) {
+				mci->need_flush_btinfo = true;
+
+				ath_dbg(common, ATH_DBG_MCI,
+					"MCI send bt_status_query fail, "
+					"set flush flag again\n");
+			}
+		}
+
+		if (query_btinfo)
+			mci->query_bt = false;
+	}
+}
+
+void ar9003_mci_send_coex_halt_bt_gpm(struct ath_hw *ah, bool halt,
+				      bool wait_done)
+{
+	struct ath_common *common = ath9k_hw_common(ah);
+	struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
+	u32 payload[4] = {0, 0, 0, 0};
+
+	ath_dbg(common, ATH_DBG_MCI, "MCI Send Coex %s BT GPM.\n",
+		(halt) ? "halt" : "unhalt");
+
+	MCI_GPM_SET_TYPE_OPCODE(payload,
+				MCI_GPM_COEX_AGENT, MCI_GPM_COEX_HALT_BT_GPM);
+
+	if (halt) {
+		mci->query_bt = true;
+		/* Send next unhalt no matter halt sent or not */
+		mci->unhalt_bt_gpm = true;
+		mci->need_flush_btinfo = true;
+		*(((u8 *)payload) + MCI_GPM_COEX_B_HALT_STATE) =
+			MCI_GPM_COEX_BT_GPM_HALT;
+	} else
+		*(((u8 *)payload) + MCI_GPM_COEX_B_HALT_STATE) =
+			MCI_GPM_COEX_BT_GPM_UNHALT;
+
+	ar9003_mci_send_message(ah, MCI_GPM, 0, payload, 16, wait_done, true);
+}
+
+
+static void ar9003_mci_prep_interface(struct ath_hw *ah)
+{
+	struct ath_common *common = ath9k_hw_common(ah);
+	struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
+	u32 saved_mci_int_en;
+	u32 mci_timeout = 150;
+
+	mci->bt_state = MCI_BT_SLEEP;
+	saved_mci_int_en = REG_READ(ah, AR_MCI_INTERRUPT_EN);
+
+	REG_WRITE(ah, AR_MCI_INTERRUPT_EN, 0);
+	REG_WRITE(ah, AR_MCI_INTERRUPT_RX_MSG_RAW,
+		  REG_READ(ah, AR_MCI_INTERRUPT_RX_MSG_RAW));
+	REG_WRITE(ah, AR_MCI_INTERRUPT_RAW,
+		  REG_READ(ah, AR_MCI_INTERRUPT_RAW));
+
+	/* Remote Reset */
+	ath_dbg(common, ATH_DBG_MCI, "MCI Reset sequence start\n");
+	ath_dbg(common, ATH_DBG_MCI, "MCI send REMOTE_RESET\n");
+	ar9003_mci_remote_reset(ah, true);
+
+	/*
+	 * This delay is required for the reset delay worst case value 255 in
+	 * MCI_COMMAND2 register
+	 */
+
+	if (AR_SREV_9462_10(ah))
+		udelay(252);
+
+	ath_dbg(common, ATH_DBG_MCI, "MCI Send REQ_WAKE to remoter(BT)\n");
+	ar9003_mci_send_req_wake(ah, true);
+
+	if (ar9003_mci_wait_for_interrupt(ah, AR_MCI_INTERRUPT_RX_MSG_RAW,
+				AR_MCI_INTERRUPT_RX_MSG_SYS_WAKING, 500)) {
+
+		ath_dbg(common, ATH_DBG_MCI,
+				"MCI SYS_WAKING from remote(BT)\n");
+		mci->bt_state = MCI_BT_AWAKE;
+
+		if (AR_SREV_9462_10(ah))
+			udelay(10);
+		/*
+		 * we don't need to send more remote_reset at this moment.
+		 * If BT receive first remote_reset, then BT HW will
+		 * be cleaned up and will be able to receive req_wake
+		 * and BT HW will respond sys_waking.
+		 * In this case, WLAN will receive BT's HW sys_waking.
+		 * Otherwise, if BT SW missed initial remote_reset,
+		 * that remote_reset will still clean up BT MCI RX,
+		 * and the req_wake will wake BT up,
+		 * and BT SW will respond this req_wake with a remote_reset and
+		 * sys_waking. In this case, WLAN will receive BT's SW
+		 * sys_waking. In either case, BT's RX is cleaned up. So we
+		 * don't need to reply BT's remote_reset now, if any.
+		 * Similarly, if in any case, WLAN can receive BT's sys_waking,
+		 * that means WLAN's RX is also fine.
+		 */
+
+		/* Send SYS_WAKING to BT */
+
+		ath_dbg(common, ATH_DBG_MCI,
+			"MCI send SW SYS_WAKING to remote BT\n");
+
+		ar9003_mci_send_sys_waking(ah, true);
+		udelay(10);
+
+		/*
+		 * Set BT priority interrupt value to be 0xff to
+		 * avoid having too many BT PRIORITY interrupts.
+		 */
+
+		REG_WRITE(ah, AR_MCI_BT_PRI0, 0xFFFFFFFF);
+		REG_WRITE(ah, AR_MCI_BT_PRI1, 0xFFFFFFFF);
+		REG_WRITE(ah, AR_MCI_BT_PRI2, 0xFFFFFFFF);
+		REG_WRITE(ah, AR_MCI_BT_PRI3, 0xFFFFFFFF);
+		REG_WRITE(ah, AR_MCI_BT_PRI, 0X000000FF);
+
+		/*
+		 * A contention reset will be received after send out
+		 * sys_waking. Also BT priority interrupt bits will be set.
+		 * Clear those bits before the next step.
+		 */
+
+		REG_WRITE(ah, AR_MCI_INTERRUPT_RX_MSG_RAW,
+			  AR_MCI_INTERRUPT_RX_MSG_CONT_RST);
+		REG_WRITE(ah, AR_MCI_INTERRUPT_RAW,
+			  AR_MCI_INTERRUPT_BT_PRI);
+
+		if (AR_SREV_9462_10(ah) || mci->is_2g) {
+			/* Send LNA_TRANS */
+			ath_dbg(common, ATH_DBG_MCI,
+				"MCI send LNA_TRANS to BT\n");
+			ar9003_mci_send_lna_transfer(ah, true);
+			udelay(5);
+		}
+
+		if (AR_SREV_9462_10(ah) || (mci->is_2g &&
+					    !mci->update_2g5g)) {
+			if (ar9003_mci_wait_for_interrupt(ah,
+				AR_MCI_INTERRUPT_RX_MSG_RAW,
+				AR_MCI_INTERRUPT_RX_MSG_LNA_INFO,
+				mci_timeout))
+				ath_dbg(common, ATH_DBG_MCI,
+					"MCI WLAN has control over the LNA & "
+					"BT obeys it\n");
+			else
+				ath_dbg(common, ATH_DBG_MCI,
+					"MCI BT didn't respond to"
+					"LNA_TRANS\n");
+		}
+
+		if (AR_SREV_9462_10(ah)) {
+			/* Send another remote_reset to deassert BT clk_req. */
+			ath_dbg(common, ATH_DBG_MCI,
+				"MCI another remote_reset to "
+				"deassert clk_req\n");
+			ar9003_mci_remote_reset(ah, true);
+			udelay(252);
+		}
+	}
+
+	/* Clear the extra redundant SYS_WAKING from BT */
+	if ((mci->bt_state == MCI_BT_AWAKE) &&
+		(REG_READ_FIELD(ah, AR_MCI_INTERRUPT_RX_MSG_RAW,
+				AR_MCI_INTERRUPT_RX_MSG_SYS_WAKING)) &&
+		(REG_READ_FIELD(ah, AR_MCI_INTERRUPT_RX_MSG_RAW,
+				AR_MCI_INTERRUPT_RX_MSG_SYS_SLEEPING) == 0)) {
+
+			REG_WRITE(ah, AR_MCI_INTERRUPT_RX_MSG_RAW,
+				  AR_MCI_INTERRUPT_RX_MSG_SYS_WAKING);
+			REG_WRITE(ah, AR_MCI_INTERRUPT_RAW,
+				  AR_MCI_INTERRUPT_REMOTE_SLEEP_UPDATE);
+	}
+
+	REG_WRITE(ah, AR_MCI_INTERRUPT_EN, saved_mci_int_en);
+}
+
+void ar9003_mci_disable_interrupt(struct ath_hw *ah)
+{
+	REG_WRITE(ah, AR_MCI_INTERRUPT_EN, 0);
+	REG_WRITE(ah, AR_MCI_INTERRUPT_RX_MSG_EN, 0);
+}
+
+void ar9003_mci_enable_interrupt(struct ath_hw *ah)
+{
+
+	REG_WRITE(ah, AR_MCI_INTERRUPT_EN, AR_MCI_INTERRUPT_DEFAULT);
+	REG_WRITE(ah, AR_MCI_INTERRUPT_RX_MSG_EN,
+		  AR_MCI_INTERRUPT_RX_MSG_DEFAULT);
+}
+
+bool ar9003_mci_check_int(struct ath_hw *ah, u32 ints)
+{
+	u32 intr;
+
+	intr = REG_READ(ah, AR_MCI_INTERRUPT_RX_MSG_RAW);
+	return ((intr & ints) == ints);
+}
+
+void ar9003_mci_get_interrupt(struct ath_hw *ah, u32 *raw_intr,
+			      u32 *rx_msg_intr)
+{
+	struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
+	*raw_intr = mci->raw_intr;
+	*rx_msg_intr = mci->rx_msg_intr;
+
+	/* Clean int bits after the values are read. */
+	mci->raw_intr = 0;
+	mci->rx_msg_intr = 0;
+}
+EXPORT_SYMBOL(ar9003_mci_get_interrupt);
+
+void ar9003_mci_2g5g_changed(struct ath_hw *ah, bool is_2g)
+{
+	struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
+
+	if (!mci->update_2g5g &&
+	    (mci->is_2g != is_2g))
+		mci->update_2g5g = true;
+
+	mci->is_2g = is_2g;
+}
+
+static bool ar9003_mci_is_gpm_valid(struct ath_hw *ah, u32 msg_index)
+{
+	struct ath_common *common = ath9k_hw_common(ah);
+	struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
+	u32 *payload;
+	u32 recv_type, offset;
+
+	if (msg_index == MCI_GPM_INVALID)
+		return false;
+
+	offset = msg_index << 4;
+
+	payload = (u32 *)(mci->gpm_buf + offset);
+	recv_type = MCI_GPM_TYPE(payload);
+
+	if (recv_type == MCI_GPM_RSVD_PATTERN) {
+		ath_dbg(common, ATH_DBG_MCI, "MCI Skip RSVD GPM\n");
+		return false;
+	}
+
+	return true;
+}
+
+static void ar9003_mci_observation_set_up(struct ath_hw *ah)
+{
+	struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
+	if (mci->config & ATH_MCI_CONFIG_MCI_OBS_MCI) {
+
+		ath9k_hw_cfg_output(ah, 3,
+					AR_GPIO_OUTPUT_MUX_AS_MCI_WLAN_DATA);
+		ath9k_hw_cfg_output(ah, 2, AR_GPIO_OUTPUT_MUX_AS_MCI_WLAN_CLK);
+		ath9k_hw_cfg_output(ah, 1, AR_GPIO_OUTPUT_MUX_AS_MCI_BT_DATA);
+		ath9k_hw_cfg_output(ah, 0, AR_GPIO_OUTPUT_MUX_AS_MCI_BT_CLK);
+
+	} else if (mci->config & ATH_MCI_CONFIG_MCI_OBS_TXRX) {
+
+		ath9k_hw_cfg_output(ah, 3, AR_GPIO_OUTPUT_MUX_AS_WL_IN_TX);
+		ath9k_hw_cfg_output(ah, 2, AR_GPIO_OUTPUT_MUX_AS_WL_IN_RX);
+		ath9k_hw_cfg_output(ah, 1, AR_GPIO_OUTPUT_MUX_AS_BT_IN_TX);
+		ath9k_hw_cfg_output(ah, 0, AR_GPIO_OUTPUT_MUX_AS_BT_IN_RX);
+		ath9k_hw_cfg_output(ah, 5, AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
+
+	} else if (mci->config & ATH_MCI_CONFIG_MCI_OBS_BT) {
+
+		ath9k_hw_cfg_output(ah, 3, AR_GPIO_OUTPUT_MUX_AS_BT_IN_TX);
+		ath9k_hw_cfg_output(ah, 2, AR_GPIO_OUTPUT_MUX_AS_BT_IN_RX);
+		ath9k_hw_cfg_output(ah, 1, AR_GPIO_OUTPUT_MUX_AS_MCI_BT_DATA);
+		ath9k_hw_cfg_output(ah, 0, AR_GPIO_OUTPUT_MUX_AS_MCI_BT_CLK);
+
+	} else
+		return;
+
+	REG_SET_BIT(ah, AR_GPIO_INPUT_EN_VAL, AR_GPIO_JTAG_DISABLE);
+
+	if (AR_SREV_9462_20_OR_LATER(ah)) {
+		REG_RMW_FIELD(ah, AR_PHY_GLB_CONTROL,
+			      AR_GLB_DS_JTAG_DISABLE, 1);
+		REG_RMW_FIELD(ah, AR_PHY_GLB_CONTROL,
+			      AR_GLB_WLAN_UART_INTF_EN, 0);
+		REG_SET_BIT(ah, AR_GLB_GPIO_CONTROL,
+			    ATH_MCI_CONFIG_MCI_OBS_GPIO);
+	}
+
+	REG_RMW_FIELD(ah, AR_BTCOEX_CTRL2, AR_BTCOEX_CTRL2_GPIO_OBS_SEL, 0);
+	REG_RMW_FIELD(ah, AR_BTCOEX_CTRL2, AR_BTCOEX_CTRL2_MAC_BB_OBS_SEL, 1);
+	REG_WRITE(ah, AR_OBS, 0x4b);
+	REG_RMW_FIELD(ah, AR_DIAG_SW, AR_DIAG_OBS_PT_SEL1, 0x03);
+	REG_RMW_FIELD(ah, AR_DIAG_SW, AR_DIAG_OBS_PT_SEL2, 0x01);
+	REG_RMW_FIELD(ah, AR_MACMISC, AR_MACMISC_MISC_OBS_BUS_LSB, 0x02);
+	REG_RMW_FIELD(ah, AR_MACMISC, AR_MACMISC_MISC_OBS_BUS_MSB, 0x03);
+	REG_RMW_FIELD(ah, AR_PHY_TEST_CTL_STATUS,
+		      AR_PHY_TEST_CTL_DEBUGPORT_SEL, 0x07);
+}
+
+static bool ar9003_mci_send_coex_bt_flags(struct ath_hw *ah, bool wait_done,
+						u8 opcode, u32 bt_flags)
+{
+	struct ath_common *common = ath9k_hw_common(ah);
+	u32 pld[4] = {0, 0, 0, 0};
+
+	MCI_GPM_SET_TYPE_OPCODE(pld,
+			MCI_GPM_COEX_AGENT, MCI_GPM_COEX_BT_UPDATE_FLAGS);
+
+	*(((u8 *)pld) + MCI_GPM_COEX_B_BT_FLAGS_OP)  = opcode;
+	*(((u8 *)pld) + MCI_GPM_COEX_W_BT_FLAGS + 0) = bt_flags & 0xFF;
+	*(((u8 *)pld) + MCI_GPM_COEX_W_BT_FLAGS + 1) = (bt_flags >> 8) & 0xFF;
+	*(((u8 *)pld) + MCI_GPM_COEX_W_BT_FLAGS + 2) = (bt_flags >> 16) & 0xFF;
+	*(((u8 *)pld) + MCI_GPM_COEX_W_BT_FLAGS + 3) = (bt_flags >> 24) & 0xFF;
+
+	ath_dbg(common, ATH_DBG_MCI,
+		"MCI BT_MCI_FLAGS: Send Coex BT Update Flags %s 0x%08x\n",
+		(opcode == MCI_GPM_COEX_BT_FLAGS_READ) ? "READ" :
+		((opcode == MCI_GPM_COEX_BT_FLAGS_SET) ? "SET" : "CLEAR"),
+								bt_flags);
+
+	return ar9003_mci_send_message(ah, MCI_GPM, 0, pld, 16,
+							wait_done, true);
+}
+
+void ar9003_mci_reset(struct ath_hw *ah, bool en_int, bool is_2g,
+		      bool is_full_sleep)
+{
+	struct ath_common *common = ath9k_hw_common(ah);
+	struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
+	u32 regval, thresh;
+
+	ath_dbg(common, ATH_DBG_MCI, "MCI full_sleep = %d, is_2g = %d\n",
+		is_full_sleep, is_2g);
+
+	/*
+	 * GPM buffer and scheduling message buffer are not allocated
+	 */
+
+	if (!mci->gpm_addr && !mci->sched_addr) {
+		ath_dbg(common, ATH_DBG_MCI,
+			"MCI GPM and schedule buffers are not allocated");
+		return;
+	}
+
+	if (REG_READ(ah, AR_BTCOEX_CTRL) == 0xdeadbeef) {
+		ath_dbg(common, ATH_DBG_MCI,
+			"MCI it's deadbeef, quit mci_reset\n");
+		return;
+	}
+
+	/* Program MCI DMA related registers */
+	REG_WRITE(ah, AR_MCI_GPM_0, mci->gpm_addr);
+	REG_WRITE(ah, AR_MCI_GPM_1, mci->gpm_len);
+	REG_WRITE(ah, AR_MCI_SCHD_TABLE_0, mci->sched_addr);
+
+	/*
+	* To avoid MCI state machine be affected by incoming remote MCI msgs,
+	* MCI mode will be enabled later, right before reset the MCI TX and RX.
+	*/
+
+	regval = SM(1, AR_BTCOEX_CTRL_AR9462_MODE) |
+		 SM(1, AR_BTCOEX_CTRL_WBTIMER_EN) |
+		 SM(1, AR_BTCOEX_CTRL_PA_SHARED) |
+		 SM(1, AR_BTCOEX_CTRL_LNA_SHARED) |
+		 SM(2, AR_BTCOEX_CTRL_NUM_ANTENNAS) |
+		 SM(3, AR_BTCOEX_CTRL_RX_CHAIN_MASK) |
+		 SM(0, AR_BTCOEX_CTRL_1_CHAIN_ACK) |
+		 SM(0, AR_BTCOEX_CTRL_1_CHAIN_BCN) |
+		 SM(0, AR_BTCOEX_CTRL_ONE_STEP_LOOK_AHEAD_EN);
+
+	if (is_2g && (AR_SREV_9462_20(ah)) &&
+		!(mci->config & ATH_MCI_CONFIG_DISABLE_OSLA)) {
+
+		regval |= SM(1, AR_BTCOEX_CTRL_ONE_STEP_LOOK_AHEAD_EN);
+		ath_dbg(common, ATH_DBG_MCI,
+				"MCI sched one step look ahead\n");
+
+		if (!(mci->config &
+		      ATH_MCI_CONFIG_DISABLE_AGGR_THRESH)) {
+
+			thresh = MS(mci->config,
+				    ATH_MCI_CONFIG_AGGR_THRESH);
+			thresh &= 7;
+			regval |= SM(1,
+				     AR_BTCOEX_CTRL_TIME_TO_NEXT_BT_THRESH_EN);
+			regval |= SM(thresh, AR_BTCOEX_CTRL_AGGR_THRESH);
+
+			REG_RMW_FIELD(ah, AR_MCI_SCHD_TABLE_2,
+				      AR_MCI_SCHD_TABLE_2_HW_BASED, 1);
+			REG_RMW_FIELD(ah, AR_MCI_SCHD_TABLE_2,
+				      AR_MCI_SCHD_TABLE_2_MEM_BASED, 1);
+
+		} else
+			ath_dbg(common, ATH_DBG_MCI,
+				"MCI sched aggr thresh: off\n");
+	} else
+		ath_dbg(common, ATH_DBG_MCI,
+			"MCI SCHED one step look ahead off\n");
+
+	if (AR_SREV_9462_10(ah))
+		regval |= SM(1, AR_BTCOEX_CTRL_SPDT_ENABLE_10);
+
+	REG_WRITE(ah, AR_BTCOEX_CTRL, regval);
+
+	if (AR_SREV_9462_20(ah)) {
+		REG_SET_BIT(ah, AR_PHY_GLB_CONTROL,
+			    AR_BTCOEX_CTRL_SPDT_ENABLE);
+		REG_RMW_FIELD(ah, AR_BTCOEX_CTRL3,
+			      AR_BTCOEX_CTRL3_CONT_INFO_TIMEOUT, 20);
+	}
+
+	REG_RMW_FIELD(ah, AR_BTCOEX_CTRL2, AR_BTCOEX_CTRL2_RX_DEWEIGHT, 1);
+	REG_RMW_FIELD(ah, AR_PCU_MISC, AR_PCU_BT_ANT_PREVENT_RX, 0);
+
+	thresh = MS(mci->config, ATH_MCI_CONFIG_CLK_DIV);
+	REG_RMW_FIELD(ah, AR_MCI_TX_CTRL, AR_MCI_TX_CTRL_CLK_DIV, thresh);
+	REG_SET_BIT(ah, AR_BTCOEX_CTRL, AR_BTCOEX_CTRL_MCI_MODE_EN);
+
+	/* Resetting the Rx and Tx paths of MCI */
+	regval = REG_READ(ah, AR_MCI_COMMAND2);
+	regval |= SM(1, AR_MCI_COMMAND2_RESET_TX);
+	REG_WRITE(ah, AR_MCI_COMMAND2, regval);
+
+	udelay(1);
+
+	regval &= ~SM(1, AR_MCI_COMMAND2_RESET_TX);
+	REG_WRITE(ah, AR_MCI_COMMAND2, regval);
+
+	if (is_full_sleep) {
+		ar9003_mci_mute_bt(ah);
+		udelay(100);
+	}
+
+	regval |= SM(1, AR_MCI_COMMAND2_RESET_RX);
+	REG_WRITE(ah, AR_MCI_COMMAND2, regval);
+	udelay(1);
+	regval &= ~SM(1, AR_MCI_COMMAND2_RESET_RX);
+	REG_WRITE(ah, AR_MCI_COMMAND2, regval);
+
+	ar9003_mci_state(ah, MCI_STATE_INIT_GPM_OFFSET, NULL);
+	REG_WRITE(ah, AR_MCI_MSG_ATTRIBUTES_TABLE,
+		  (SM(0xe801, AR_MCI_MSG_ATTRIBUTES_TABLE_INVALID_HDR) |
+		   SM(0x0000, AR_MCI_MSG_ATTRIBUTES_TABLE_CHECKSUM)));
+
+	REG_CLR_BIT(ah, AR_MCI_TX_CTRL,
+			AR_MCI_TX_CTRL_DISABLE_LNA_UPDATE);
+
+	if (AR_SREV_9462_20_OR_LATER(ah))
+		ar9003_mci_observation_set_up(ah);
+
+	mci->ready = true;
+	ar9003_mci_prep_interface(ah);
+
+	if (en_int)
+		ar9003_mci_enable_interrupt(ah);
+}
+
+void ar9003_mci_mute_bt(struct ath_hw *ah)
+{
+	struct ath_common *common = ath9k_hw_common(ah);
+
+	/* disable all MCI messages */
+	REG_WRITE(ah, AR_MCI_MSG_ATTRIBUTES_TABLE, 0xffff0000);
+	REG_WRITE(ah, AR_BTCOEX_WL_WEIGHTS0, 0xffffffff);
+	REG_WRITE(ah, AR_BTCOEX_WL_WEIGHTS1, 0xffffffff);
+	REG_WRITE(ah, AR_BTCOEX_WL_WEIGHTS2, 0xffffffff);
+	REG_WRITE(ah, AR_BTCOEX_WL_WEIGHTS3, 0xffffffff);
+	REG_SET_BIT(ah, AR_MCI_TX_CTRL, AR_MCI_TX_CTRL_DISABLE_LNA_UPDATE);
+
+	/* wait pending HW messages to flush out */
+	udelay(10);
+
+	/*
+	 * Send LNA_TAKE and SYS_SLEEPING when
+	 * 1. reset not after resuming from full sleep
+	 * 2. before reset MCI RX, to quiet BT and avoid MCI RX misalignment
+	 */
+
+	ath_dbg(common, ATH_DBG_MCI, "MCI Send LNA take\n");
+	ar9003_mci_send_lna_take(ah, true);
+
+	udelay(5);
+
+	ath_dbg(common, ATH_DBG_MCI, "MCI Send sys sleeping\n");
+	ar9003_mci_send_sys_sleeping(ah, true);
+}
+
+void ar9003_mci_sync_bt_state(struct ath_hw *ah)
+{
+	struct ath_common *common = ath9k_hw_common(ah);
+	struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
+	u32 cur_bt_state;
+
+	cur_bt_state = ar9003_mci_state(ah, MCI_STATE_REMOTE_SLEEP, NULL);
+
+	if (mci->bt_state != cur_bt_state) {
+		ath_dbg(common, ATH_DBG_MCI,
+			"MCI BT state mismatches. old: %d, new: %d\n",
+			mci->bt_state, cur_bt_state);
+		mci->bt_state = cur_bt_state;
+	}
+
+	if (mci->bt_state != MCI_BT_SLEEP) {
+
+		ar9003_mci_send_coex_version_query(ah, true);
+		ar9003_mci_send_coex_wlan_channels(ah, true);
+
+		if (mci->unhalt_bt_gpm == true) {
+			ath_dbg(common, ATH_DBG_MCI, "MCI unhalt BT GPM");
+			ar9003_mci_send_coex_halt_bt_gpm(ah, false, true);
+		}
+	}
+}
+
+static void ar9003_mci_send_2g5g_status(struct ath_hw *ah, bool wait_done)
+{
+	struct ath_common *common = ath9k_hw_common(ah);
+	struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
+	u32 new_flags, to_set, to_clear;
+
+	if (AR_SREV_9462_20(ah) &&
+	    mci->update_2g5g &&
+	    (mci->bt_state != MCI_BT_SLEEP)) {
+
+		if (mci->is_2g) {
+			new_flags = MCI_2G_FLAGS;
+			to_clear = MCI_2G_FLAGS_CLEAR_MASK;
+			to_set = MCI_2G_FLAGS_SET_MASK;
+		} else {
+			new_flags = MCI_5G_FLAGS;
+			to_clear = MCI_5G_FLAGS_CLEAR_MASK;
+			to_set = MCI_5G_FLAGS_SET_MASK;
+		}
+
+		ath_dbg(common, ATH_DBG_MCI,
+			"MCI BT_MCI_FLAGS: %s 0x%08x clr=0x%08x, set=0x%08x\n",
+		mci->is_2g ? "2G" : "5G", new_flags, to_clear, to_set);
+
+		if (to_clear)
+			ar9003_mci_send_coex_bt_flags(ah, wait_done,
+					MCI_GPM_COEX_BT_FLAGS_CLEAR, to_clear);
+
+		if (to_set)
+			ar9003_mci_send_coex_bt_flags(ah, wait_done,
+					MCI_GPM_COEX_BT_FLAGS_SET, to_set);
+	}
+
+	if (AR_SREV_9462_10(ah) && (mci->bt_state != MCI_BT_SLEEP))
+		mci->update_2g5g = false;
+}
+
+static void ar9003_mci_queue_unsent_gpm(struct ath_hw *ah, u8 header,
+					u32 *payload, bool queue)
+{
+	struct ath_common *common = ath9k_hw_common(ah);
+	struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
+	u8 type, opcode;
+
+	if (queue) {
+
+		if (payload)
+			ath_dbg(common, ATH_DBG_MCI,
+				"MCI ERROR: Send fail: %02x: %02x %02x %02x\n",
+				header,
+				*(((u8 *)payload) + 4),
+				*(((u8 *)payload) + 5),
+				*(((u8 *)payload) + 6));
+		else
+			ath_dbg(common, ATH_DBG_MCI,
+				"MCI ERROR: Send fail: %02x\n", header);
+	}
+
+	/* check if the message is to be queued */
+	if (header != MCI_GPM)
+		return;
+
+	type = MCI_GPM_TYPE(payload);
+	opcode = MCI_GPM_OPCODE(payload);
+
+	if (type != MCI_GPM_COEX_AGENT)
+		return;
+
+	switch (opcode) {
+	case MCI_GPM_COEX_BT_UPDATE_FLAGS:
+
+		if (AR_SREV_9462_10(ah))
+			break;
+
+		if (*(((u8 *)payload) + MCI_GPM_COEX_B_BT_FLAGS_OP) ==
+				MCI_GPM_COEX_BT_FLAGS_READ)
+			break;
+
+		mci->update_2g5g = queue;
+
+		if (queue)
+			ath_dbg(common, ATH_DBG_MCI,
+				"MCI BT_MCI_FLAGS: 2G5G status <queued> %s.\n",
+				mci->is_2g ? "2G" : "5G");
+		else
+			ath_dbg(common, ATH_DBG_MCI,
+				"MCI BT_MCI_FLAGS: 2G5G status <sent> %s.\n",
+				mci->is_2g ? "2G" : "5G");
+
+		break;
+
+	case MCI_GPM_COEX_WLAN_CHANNELS:
+
+		mci->wlan_channels_update = queue;
+		if (queue)
+			ath_dbg(common, ATH_DBG_MCI,
+				"MCI WLAN channel map <queued>\n");
+		else
+			ath_dbg(common, ATH_DBG_MCI,
+				"MCI WLAN channel map <sent>\n");
+		break;
+
+	case MCI_GPM_COEX_HALT_BT_GPM:
+
+		if (*(((u8 *)payload) + MCI_GPM_COEX_B_HALT_STATE) ==
+				MCI_GPM_COEX_BT_GPM_UNHALT) {
+
+			mci->unhalt_bt_gpm = queue;
+
+			if (queue)
+				ath_dbg(common, ATH_DBG_MCI,
+					"MCI UNHALT BT GPM <queued>\n");
+			else {
+				mci->halted_bt_gpm = false;
+				ath_dbg(common, ATH_DBG_MCI,
+					"MCI UNHALT BT GPM <sent>\n");
+			}
+		}
+
+		if (*(((u8 *)payload) + MCI_GPM_COEX_B_HALT_STATE) ==
+				MCI_GPM_COEX_BT_GPM_HALT) {
+
+			mci->halted_bt_gpm = !queue;
+
+			if (queue)
+				ath_dbg(common, ATH_DBG_MCI,
+					"MCI HALT BT GPM <not sent>\n");
+			else
+				ath_dbg(common, ATH_DBG_MCI,
+					"MCI UNHALT BT GPM <sent>\n");
+		}
+
+		break;
+	default:
+		break;
+	}
+}
+
+void ar9003_mci_2g5g_switch(struct ath_hw *ah, bool wait_done)
+{
+	struct ath_common *common = ath9k_hw_common(ah);
+	struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
+
+	if (mci->update_2g5g) {
+		if (mci->is_2g) {
+
+			ar9003_mci_send_2g5g_status(ah, true);
+			ath_dbg(common, ATH_DBG_MCI, "MCI Send LNA trans\n");
+			ar9003_mci_send_lna_transfer(ah, true);
+			udelay(5);
+
+			REG_CLR_BIT(ah, AR_MCI_TX_CTRL,
+				    AR_MCI_TX_CTRL_DISABLE_LNA_UPDATE);
+
+			if (AR_SREV_9462_20(ah)) {
+				REG_CLR_BIT(ah, AR_PHY_GLB_CONTROL,
+					    AR_BTCOEX_CTRL_BT_OWN_SPDT_CTRL);
+				if (!(mci->config &
+				      ATH_MCI_CONFIG_DISABLE_OSLA)) {
+					REG_SET_BIT(ah, AR_BTCOEX_CTRL,
+					AR_BTCOEX_CTRL_ONE_STEP_LOOK_AHEAD_EN);
+				}
+			}
+		} else {
+			ath_dbg(common, ATH_DBG_MCI, "MCI Send LNA take\n");
+			ar9003_mci_send_lna_take(ah, true);
+			udelay(5);
+
+			REG_SET_BIT(ah, AR_MCI_TX_CTRL,
+				    AR_MCI_TX_CTRL_DISABLE_LNA_UPDATE);
+
+			if (AR_SREV_9462_20(ah)) {
+				REG_SET_BIT(ah, AR_PHY_GLB_CONTROL,
+					    AR_BTCOEX_CTRL_BT_OWN_SPDT_CTRL);
+				REG_CLR_BIT(ah, AR_BTCOEX_CTRL,
+					AR_BTCOEX_CTRL_ONE_STEP_LOOK_AHEAD_EN);
+			}
+
+			ar9003_mci_send_2g5g_status(ah, true);
+		}
+	}
+}
+
+bool ar9003_mci_send_message(struct ath_hw *ah, u8 header, u32 flag,
+			     u32 *payload, u8 len, bool wait_done,
+			     bool check_bt)
+{
+	struct ath_common *common = ath9k_hw_common(ah);
+	struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
+	bool msg_sent = false;
+	u32 regval;
+	u32 saved_mci_int_en;
+	int i;
+
+	saved_mci_int_en = REG_READ(ah, AR_MCI_INTERRUPT_EN);
+	regval = REG_READ(ah, AR_BTCOEX_CTRL);
+
+	if ((regval == 0xdeadbeef) || !(regval & AR_BTCOEX_CTRL_MCI_MODE_EN)) {
+
+		ath_dbg(common, ATH_DBG_MCI,
+			"MCI Not sending 0x%x. MCI is not enabled. "
+			"full_sleep = %d\n", header,
+			(ah->power_mode == ATH9K_PM_FULL_SLEEP) ? 1 : 0);
+
+		ar9003_mci_queue_unsent_gpm(ah, header, payload, true);
+		return false;
+
+	} else if (check_bt && (mci->bt_state == MCI_BT_SLEEP)) {
+
+		ath_dbg(common, ATH_DBG_MCI,
+		"MCI Don't send message 0x%x. BT is in sleep state\n", header);
+
+		ar9003_mci_queue_unsent_gpm(ah, header, payload, true);
+		return false;
+	}
+
+	if (wait_done)
+		REG_WRITE(ah, AR_MCI_INTERRUPT_EN, 0);
+
+	/* Need to clear SW_MSG_DONE raw bit before wait */
+
+	REG_WRITE(ah, AR_MCI_INTERRUPT_RAW,
+		  (AR_MCI_INTERRUPT_SW_MSG_DONE |
+		   AR_MCI_INTERRUPT_MSG_FAIL_MASK));
+
+	if (payload) {
+		for (i = 0; (i * 4) < len; i++)
+			REG_WRITE(ah, (AR_MCI_TX_PAYLOAD0 + i * 4),
+				  *(payload + i));
+	}
+
+	REG_WRITE(ah, AR_MCI_COMMAND0,
+		  (SM((flag & MCI_FLAG_DISABLE_TIMESTAMP),
+		      AR_MCI_COMMAND0_DISABLE_TIMESTAMP) |
+		   SM(len, AR_MCI_COMMAND0_LEN) |
+		   SM(header, AR_MCI_COMMAND0_HEADER)));
+
+	if (wait_done &&
+	    !(ar9003_mci_wait_for_interrupt(ah, AR_MCI_INTERRUPT_RAW,
+					AR_MCI_INTERRUPT_SW_MSG_DONE, 500)))
+		ar9003_mci_queue_unsent_gpm(ah, header, payload, true);
+	else {
+		ar9003_mci_queue_unsent_gpm(ah, header, payload, false);
+		msg_sent = true;
+	}
+
+	if (wait_done)
+		REG_WRITE(ah, AR_MCI_INTERRUPT_EN, saved_mci_int_en);
+
+	return msg_sent;
+}
+EXPORT_SYMBOL(ar9003_mci_send_message);
+
+void ar9003_mci_setup(struct ath_hw *ah, u32 gpm_addr, void *gpm_buf,
+		      u16 len, u32 sched_addr)
+{
+	struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
+	void *sched_buf = (void *)((char *) gpm_buf + (sched_addr - gpm_addr));
+
+	mci->gpm_addr = gpm_addr;
+	mci->gpm_buf = gpm_buf;
+	mci->gpm_len = len;
+	mci->sched_addr = sched_addr;
+	mci->sched_buf = sched_buf;
+
+	ar9003_mci_reset(ah, true, true, true);
+}
+EXPORT_SYMBOL(ar9003_mci_setup);
+
+void ar9003_mci_cleanup(struct ath_hw *ah)
+{
+	struct ath_common *common = ath9k_hw_common(ah);
+
+	/* Turn off MCI and Jupiter mode. */
+	REG_WRITE(ah, AR_BTCOEX_CTRL, 0x00);
+	ath_dbg(common, ATH_DBG_MCI, "MCI ar9003_mci_cleanup\n");
+	ar9003_mci_disable_interrupt(ah);
+}
+EXPORT_SYMBOL(ar9003_mci_cleanup);
+
+static void ar9003_mci_process_gpm_extra(struct ath_hw *ah, u8 gpm_type,
+					 u8 gpm_opcode, u32 *p_gpm)
+{
+	struct ath_common *common = ath9k_hw_common(ah);
+	struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
+	u8 *p_data = (u8 *) p_gpm;
+
+	if (gpm_type != MCI_GPM_COEX_AGENT)
+		return;
+
+	switch (gpm_opcode) {
+	case MCI_GPM_COEX_VERSION_QUERY:
+		ath_dbg(common, ATH_DBG_MCI,
+			"MCI Recv GPM COEX Version Query\n");
+		ar9003_mci_send_coex_version_response(ah, true);
+		break;
+	case MCI_GPM_COEX_VERSION_RESPONSE:
+		ath_dbg(common, ATH_DBG_MCI,
+			"MCI Recv GPM COEX Version Response\n");
+		mci->bt_ver_major =
+			*(p_data + MCI_GPM_COEX_B_MAJOR_VERSION);
+		mci->bt_ver_minor =
+			*(p_data + MCI_GPM_COEX_B_MINOR_VERSION);
+		mci->bt_version_known = true;
+		ath_dbg(common, ATH_DBG_MCI,
+			"MCI BT Coex version: %d.%d\n",
+			mci->bt_ver_major,
+			mci->bt_ver_minor);
+		break;
+	case MCI_GPM_COEX_STATUS_QUERY:
+		ath_dbg(common, ATH_DBG_MCI,
+			"MCI Recv GPM COEX Status Query = 0x%02X.\n",
+			*(p_data + MCI_GPM_COEX_B_WLAN_BITMAP));
+		mci->wlan_channels_update = true;
+		ar9003_mci_send_coex_wlan_channels(ah, true);
+		break;
+	case MCI_GPM_COEX_BT_PROFILE_INFO:
+		mci->query_bt = true;
+		ath_dbg(common, ATH_DBG_MCI,
+			"MCI Recv GPM COEX BT_Profile_Info\n");
+		break;
+	case MCI_GPM_COEX_BT_STATUS_UPDATE:
+		mci->query_bt = true;
+		ath_dbg(common, ATH_DBG_MCI,
+			"MCI Recv GPM COEX BT_Status_Update "
+			"SEQ=%d (drop&query)\n", *(p_gpm + 3));
+		break;
+	default:
+		break;
+	}
+}
+
+u32 ar9003_mci_wait_for_gpm(struct ath_hw *ah, u8 gpm_type,
+			    u8 gpm_opcode, int time_out)
+{
+	struct ath_common *common = ath9k_hw_common(ah);
+	struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
+	u32 *p_gpm = NULL, mismatch = 0, more_data;
+	u32 offset;
+	u8 recv_type = 0, recv_opcode = 0;
+	bool b_is_bt_cal_done = (gpm_type == MCI_GPM_BT_CAL_DONE);
+
+	more_data = time_out ? MCI_GPM_NOMORE : MCI_GPM_MORE;
+
+	while (time_out > 0) {
+		if (p_gpm) {
+			MCI_GPM_RECYCLE(p_gpm);
+			p_gpm = NULL;
+		}
+
+		if (more_data != MCI_GPM_MORE)
+			time_out = ar9003_mci_wait_for_interrupt(ah,
+					AR_MCI_INTERRUPT_RX_MSG_RAW,
+					AR_MCI_INTERRUPT_RX_MSG_GPM,
+					time_out);
+
+		if (!time_out)
+			break;
+
+		offset = ar9003_mci_state(ah,
+				MCI_STATE_NEXT_GPM_OFFSET, &more_data);
+
+		if (offset == MCI_GPM_INVALID)
+			continue;
+
+		p_gpm = (u32 *) (mci->gpm_buf + offset);
+		recv_type = MCI_GPM_TYPE(p_gpm);
+		recv_opcode = MCI_GPM_OPCODE(p_gpm);
+
+		if (MCI_GPM_IS_CAL_TYPE(recv_type)) {
+
+			if (recv_type == gpm_type) {
+
+				if ((gpm_type == MCI_GPM_BT_CAL_DONE) &&
+				    !b_is_bt_cal_done) {
+					gpm_type = MCI_GPM_BT_CAL_GRANT;
+					ath_dbg(common, ATH_DBG_MCI,
+						"MCI Recv BT_CAL_DONE"
+						"wait BT_CAL_GRANT\n");
+					continue;
+				}
+
+				break;
+			}
+		} else if ((recv_type == gpm_type) &&
+			   (recv_opcode == gpm_opcode))
+			break;
+
+		/* not expected message */
+
+		/*
+		 * check if it's cal_grant
+		 *
+		 * When we're waiting for cal_grant in reset routine,
+		 * it's possible that BT sends out cal_request at the
+		 * same time. Since BT's calibration doesn't happen
+		 * that often, we'll let BT completes calibration then
+		 * we continue to wait for cal_grant from BT.
+		 * Orginal: Wait BT_CAL_GRANT.
+		 * New: Receive BT_CAL_REQ -> send WLAN_CAL_GRANT->wait
+		 * BT_CAL_DONE -> Wait BT_CAL_GRANT.
+		 */
+
+		if ((gpm_type == MCI_GPM_BT_CAL_GRANT) &&
+		    (recv_type == MCI_GPM_BT_CAL_REQ)) {
+
+			u32 payload[4] = {0, 0, 0, 0};
+
+			gpm_type = MCI_GPM_BT_CAL_DONE;
+			ath_dbg(common, ATH_DBG_MCI,
+				"MCI Rcv BT_CAL_REQ, send WLAN_CAL_GRANT\n");
+
+			MCI_GPM_SET_CAL_TYPE(payload,
+					MCI_GPM_WLAN_CAL_GRANT);
+
+			ar9003_mci_send_message(ah, MCI_GPM, 0, payload, 16,
+						false, false);
+
+			ath_dbg(common, ATH_DBG_MCI,
+				"MCI now wait for BT_CAL_DONE\n");
+
+			continue;
+		} else {
+			ath_dbg(common, ATH_DBG_MCI, "MCI GPM subtype"
+					"not match 0x%x\n", *(p_gpm + 1));
+			mismatch++;
+			ar9003_mci_process_gpm_extra(ah, recv_type,
+					recv_opcode, p_gpm);
+		}
+	}
+	if (p_gpm) {
+		MCI_GPM_RECYCLE(p_gpm);
+		p_gpm = NULL;
+	}
+
+	if (time_out <= 0) {
+		time_out = 0;
+		ath_dbg(common, ATH_DBG_MCI,
+			"MCI GPM received timeout, mismatch = %d\n", mismatch);
+	} else
+		ath_dbg(common, ATH_DBG_MCI,
+			"MCI Receive GPM type=0x%x, code=0x%x\n",
+			gpm_type, gpm_opcode);
+
+	while (more_data == MCI_GPM_MORE) {
+
+		ath_dbg(common, ATH_DBG_MCI, "MCI discard remaining GPM\n");
+		offset = ar9003_mci_state(ah, MCI_STATE_NEXT_GPM_OFFSET,
+					  &more_data);
+
+		if (offset == MCI_GPM_INVALID)
+			break;
+
+		p_gpm = (u32 *) (mci->gpm_buf + offset);
+		recv_type = MCI_GPM_TYPE(p_gpm);
+		recv_opcode = MCI_GPM_OPCODE(p_gpm);
+
+		if (!MCI_GPM_IS_CAL_TYPE(recv_type))
+			ar9003_mci_process_gpm_extra(ah, recv_type,
+						     recv_opcode, p_gpm);
+
+		MCI_GPM_RECYCLE(p_gpm);
+	}
+
+	return time_out;
+}
+
+u32 ar9003_mci_state(struct ath_hw *ah, u32 state_type, u32 *p_data)
+{
+	struct ath_common *common = ath9k_hw_common(ah);
+	struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
+	u32 value = 0, more_gpm = 0, gpm_ptr;
+	u8 query_type;
+
+	switch (state_type) {
+	case MCI_STATE_ENABLE:
+		if (mci->ready) {
+
+			value = REG_READ(ah, AR_BTCOEX_CTRL);
+
+			if ((value == 0xdeadbeef) || (value == 0xffffffff))
+				value = 0;
+		}
+		value &= AR_BTCOEX_CTRL_MCI_MODE_EN;
+		break;
+	case MCI_STATE_INIT_GPM_OFFSET:
+		value = MS(REG_READ(ah, AR_MCI_GPM_1), AR_MCI_GPM_WRITE_PTR);
+		ath_dbg(common, ATH_DBG_MCI,
+			"MCI GPM initial WRITE_PTR=%d\n", value);
+		mci->gpm_idx = value;
+		break;
+	case MCI_STATE_NEXT_GPM_OFFSET:
+	case MCI_STATE_LAST_GPM_OFFSET:
+		/*
+		* This could be useful to avoid new GPM message interrupt which
+		* may lead to spurious interrupt after power sleep, or multiple
+		* entry of ath_mci_intr().
+		* Adding empty GPM check by returning HAL_MCI_GPM_INVALID can
+		* alleviate this effect, but clearing GPM RX interrupt bit is
+		* safe, because whether this is called from hw or driver code
+		* there must be an interrupt bit set/triggered initially
+		*/
+		REG_WRITE(ah, AR_MCI_INTERRUPT_RX_MSG_RAW,
+			  AR_MCI_INTERRUPT_RX_MSG_GPM);
+
+		gpm_ptr = MS(REG_READ(ah, AR_MCI_GPM_1), AR_MCI_GPM_WRITE_PTR);
+		value = gpm_ptr;
+
+		if (value == 0)
+			value = mci->gpm_len - 1;
+		else if (value >= mci->gpm_len) {
+			if (value != 0xFFFF) {
+				value = 0;
+				ath_dbg(common, ATH_DBG_MCI, "MCI GPM offset"
+					"out of range\n");
+			}
+		} else
+			value--;
+
+		if (value == 0xFFFF) {
+			value = MCI_GPM_INVALID;
+			more_gpm = MCI_GPM_NOMORE;
+			ath_dbg(common, ATH_DBG_MCI, "MCI GPM ptr invalid"
+				"@ptr=%d, offset=%d, more=GPM_NOMORE\n",
+				gpm_ptr, value);
+		} else if (state_type == MCI_STATE_NEXT_GPM_OFFSET) {
+
+			if (gpm_ptr == mci->gpm_idx) {
+				value = MCI_GPM_INVALID;
+				more_gpm = MCI_GPM_NOMORE;
+
+				ath_dbg(common, ATH_DBG_MCI, "MCI GPM message"
+					"not available @ptr=%d, @offset=%d,"
+					"more=GPM_NOMORE\n", gpm_ptr, value);
+			} else {
+				for (;;) {
+
+					u32 temp_index;
+
+					/* skip reserved GPM if any */
+
+					if (value != mci->gpm_idx)
+						more_gpm = MCI_GPM_MORE;
+					else
+						more_gpm = MCI_GPM_NOMORE;
+
+					temp_index = mci->gpm_idx;
+					mci->gpm_idx++;
+
+					if (mci->gpm_idx >=
+					    mci->gpm_len)
+						mci->gpm_idx = 0;
+
+					ath_dbg(common, ATH_DBG_MCI,
+						"MCI GPM message got ptr=%d,"
+						"@offset=%d, more=%d\n",
+						gpm_ptr, temp_index,
+						(more_gpm == MCI_GPM_MORE));
+
+					if (ar9003_mci_is_gpm_valid(ah,
+								temp_index)) {
+						value = temp_index;
+						break;
+					}
+
+					if (more_gpm == MCI_GPM_NOMORE) {
+						value = MCI_GPM_INVALID;
+						break;
+					}
+				}
+			}
+			if (p_data)
+				*p_data = more_gpm;
+			}
+
+			if (value != MCI_GPM_INVALID)
+				value <<= 4;
+
+			break;
+	case MCI_STATE_LAST_SCHD_MSG_OFFSET:
+		value = MS(REG_READ(ah, AR_MCI_RX_STATUS),
+				    AR_MCI_RX_LAST_SCHD_MSG_INDEX);
+		/* Make it in bytes */
+		value <<= 4;
+		break;
+
+	case MCI_STATE_REMOTE_SLEEP:
+		value = MS(REG_READ(ah, AR_MCI_RX_STATUS),
+			   AR_MCI_RX_REMOTE_SLEEP) ?
+			MCI_BT_SLEEP : MCI_BT_AWAKE;
+		break;
+
+	case MCI_STATE_CONT_RSSI_POWER:
+		value = MS(mci->cont_status, AR_MCI_CONT_RSSI_POWER);
+			break;
+
+	case MCI_STATE_CONT_PRIORITY:
+		value = MS(mci->cont_status, AR_MCI_CONT_RRIORITY);
+		break;
+
+	case MCI_STATE_CONT_TXRX:
+		value = MS(mci->cont_status, AR_MCI_CONT_TXRX);
+		break;
+
+	case MCI_STATE_BT:
+		value = mci->bt_state;
+		break;
+
+	case MCI_STATE_SET_BT_SLEEP:
+		mci->bt_state = MCI_BT_SLEEP;
+		break;
+
+	case MCI_STATE_SET_BT_AWAKE:
+		mci->bt_state = MCI_BT_AWAKE;
+		ar9003_mci_send_coex_version_query(ah, true);
+		ar9003_mci_send_coex_wlan_channels(ah, true);
+
+		if (mci->unhalt_bt_gpm) {
+
+			ath_dbg(common, ATH_DBG_MCI,
+				"MCI unhalt BT GPM\n");
+			ar9003_mci_send_coex_halt_bt_gpm(ah, false, true);
+		}
+
+		ar9003_mci_2g5g_switch(ah, true);
+		break;
+
+	case MCI_STATE_SET_BT_CAL_START:
+		mci->bt_state = MCI_BT_CAL_START;
+		break;
+
+	case MCI_STATE_SET_BT_CAL:
+		mci->bt_state = MCI_BT_CAL;
+		break;
+
+	case MCI_STATE_RESET_REQ_WAKE:
+		ar9003_mci_reset_req_wakeup(ah);
+		mci->update_2g5g = true;
+
+		if ((AR_SREV_9462_20_OR_LATER(ah)) &&
+		    (mci->config & ATH_MCI_CONFIG_MCI_OBS_MASK)) {
+			/* Check if we still have control of the GPIOs */
+			if ((REG_READ(ah, AR_GLB_GPIO_CONTROL) &
+				      ATH_MCI_CONFIG_MCI_OBS_GPIO) !=
+					ATH_MCI_CONFIG_MCI_OBS_GPIO) {
+
+				ath_dbg(common, ATH_DBG_MCI,
+					"MCI reconfigure observation");
+				ar9003_mci_observation_set_up(ah);
+			}
+		}
+		break;
+
+	case MCI_STATE_SEND_WLAN_COEX_VERSION:
+		ar9003_mci_send_coex_version_response(ah, true);
+		break;
+
+	case MCI_STATE_SET_BT_COEX_VERSION:
+
+		if (!p_data)
+			ath_dbg(common, ATH_DBG_MCI,
+				"MCI Set BT Coex version with NULL data!!\n");
+		else {
+			mci->bt_ver_major = (*p_data >> 8) & 0xff;
+			mci->bt_ver_minor = (*p_data) & 0xff;
+			mci->bt_version_known = true;
+			ath_dbg(common, ATH_DBG_MCI,
+				"MCI BT version set: %d.%d\n",
+				mci->bt_ver_major,
+				mci->bt_ver_minor);
+		}
+		break;
+
+	case MCI_STATE_SEND_WLAN_CHANNELS:
+		if (p_data) {
+			if (((mci->wlan_channels[1] & 0xffff0000) ==
+			     (*(p_data + 1) & 0xffff0000)) &&
+			    (mci->wlan_channels[2] == *(p_data + 2)) &&
+			    (mci->wlan_channels[3] == *(p_data + 3)))
+				break;
+
+			mci->wlan_channels[0] = *p_data++;
+			mci->wlan_channels[1] = *p_data++;
+			mci->wlan_channels[2] = *p_data++;
+			mci->wlan_channels[3] = *p_data++;
+		}
+		mci->wlan_channels_update = true;
+		ar9003_mci_send_coex_wlan_channels(ah, true);
+		break;
+
+	case MCI_STATE_SEND_VERSION_QUERY:
+		ar9003_mci_send_coex_version_query(ah, true);
+		break;
+
+	case MCI_STATE_SEND_STATUS_QUERY:
+		query_type = (AR_SREV_9462_10(ah)) ?
+				MCI_GPM_COEX_QUERY_BT_ALL_INFO :
+				MCI_GPM_COEX_QUERY_BT_TOPOLOGY;
+
+		ar9003_mci_send_coex_bt_status_query(ah, true, query_type);
+		break;
+
+	case MCI_STATE_NEED_FLUSH_BT_INFO:
+			/*
+			 * btcoex_hw.mci.unhalt_bt_gpm means whether it's
+			 * needed to send UNHALT message. It's set whenever
+			 * there's a request to send HALT message.
+			 * mci_halted_bt_gpm means whether HALT message is sent
+			 * out successfully.
+			 *
+			 * Checking (mci_unhalt_bt_gpm == false) instead of
+			 * checking (ah->mci_halted_bt_gpm == false) will make
+			 * sure currently is in UNHALT-ed mode and BT can
+			 * respond to status query.
+			 */
+			value = (!mci->unhalt_bt_gpm &&
+				 mci->need_flush_btinfo) ? 1 : 0;
+			if (p_data)
+				mci->need_flush_btinfo =
+					(*p_data != 0) ? true : false;
+			break;
+
+	case MCI_STATE_RECOVER_RX:
+
+		ath_dbg(common, ATH_DBG_MCI, "MCI hw RECOVER_RX\n");
+		ar9003_mci_prep_interface(ah);
+		mci->query_bt = true;
+		mci->need_flush_btinfo = true;
+		ar9003_mci_send_coex_wlan_channels(ah, true);
+		ar9003_mci_2g5g_switch(ah, true);
+		break;
+
+	case MCI_STATE_NEED_FTP_STOMP:
+		value = !(mci->config & ATH_MCI_CONFIG_DISABLE_FTP_STOMP);
+		break;
+
+	case MCI_STATE_NEED_TUNING:
+		value = !(mci->config & ATH_MCI_CONFIG_DISABLE_TUNING);
+		break;
+
+	default:
+		break;
+
+	}
+
+	return value;
+}
+EXPORT_SYMBOL(ar9003_mci_state);

drivers/net/wireless/ath/ath9k/hw.h

@@ -1203,6 +1203,32 @@ void ath9k_ani_reset(struct ath_hw *ah, bool is_scanning);
 void ath9k_hw_proc_mib_event(struct ath_hw *ah);
 void ath9k_hw_ani_monitor(struct ath_hw *ah, struct ath9k_channel *chan);
 
+bool ar9003_mci_send_message(struct ath_hw *ah, u8 header, u32 flag,
+			     u32 *payload, u8 len, bool wait_done,
+			     bool check_bt);
+void ar9003_mci_mute_bt(struct ath_hw *ah);
+u32 ar9003_mci_state(struct ath_hw *ah, u32 state_type, u32 *p_data);
+void ar9003_mci_setup(struct ath_hw *ah, u32 gpm_addr, void *gpm_buf,
+		      u16 len, u32 sched_addr);
+void ar9003_mci_cleanup(struct ath_hw *ah);
+void ar9003_mci_send_coex_halt_bt_gpm(struct ath_hw *ah, bool halt,
+				      bool wait_done);
+u32 ar9003_mci_wait_for_gpm(struct ath_hw *ah, u8 gpm_type,
+			    u8 gpm_opcode, int time_out);
+void ar9003_mci_2g5g_changed(struct ath_hw *ah, bool is_2g);
+void ar9003_mci_disable_interrupt(struct ath_hw *ah);
+void ar9003_mci_enable_interrupt(struct ath_hw *ah);
+void ar9003_mci_2g5g_switch(struct ath_hw *ah, bool wait_done);
+void ar9003_mci_reset(struct ath_hw *ah, bool en_int, bool is_2g,
+		      bool is_full_sleep);
+bool ar9003_mci_check_int(struct ath_hw *ah, u32 ints);
+void ar9003_mci_remote_reset(struct ath_hw *ah, bool wait_done);
+void ar9003_mci_send_sys_waking(struct ath_hw *ah, bool wait_done);
+void ar9003_mci_send_lna_transfer(struct ath_hw *ah, bool wait_done);
+void ar9003_mci_sync_bt_state(struct ath_hw *ah);
+void ar9003_mci_get_interrupt(struct ath_hw *ah, u32 *raw_intr,
+			      u32 *rx_msg_intr);
+
 #define ATH9K_CLOCK_RATE_CCK		22
 #define ATH9K_CLOCK_RATE_5GHZ_OFDM	40
 #define ATH9K_CLOCK_RATE_2GHZ_OFDM	44