diff --git a/dp/inc/cdp_txrx_stats_struct.h b/dp/inc/cdp_txrx_stats_struct.h
index 3c8e76622095..24684cfdd36c 100644
--- a/dp/inc/cdp_txrx_stats_struct.h
+++ b/dp/inc/cdp_txrx_stats_struct.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016 The Linux Foundation. All rights reserved.
+ * Copyright (c) 2016-2017 The Linux Foundation. All rights reserved.
  *
  * Previously licensed under the ISC license by Qualcomm Atheros, Inc.
  *
@@ -472,6 +472,7 @@ typedef enum _ol_ath_param_t {
 	OL_ATH_PARAM_PREFERRED_UPLINK = 344,
 	OL_ATH_PARAM_PRECAC_ENABLE = 345,
 	OL_ATH_PARAM_PRECAC_TIMEOUT = 346,
+	OL_ATH_COEX_VER_CFG = 347,
 } ol_ath_param_t;
 
 /*
diff --git a/wmi/inc/wmi_unified_api.h b/wmi/inc/wmi_unified_api.h
index aec58834a8e2..c3414bd13a77 100644
--- a/wmi/inc/wmi_unified_api.h
+++ b/wmi/inc/wmi_unified_api.h
@@ -929,6 +929,9 @@ QDF_STATUS wmi_unified_send_btcoex_wlan_priority_cmd(void *wmi_hdl,
 QDF_STATUS wmi_unified_send_btcoex_duty_cycle_cmd(void *wmi_hdl,
 				struct btcoex_cfg_params *param);
 
+QDF_STATUS wmi_unified_send_coex_ver_cfg_cmd(void *wmi_hdl,
+				coex_ver_cfg_t *param);
+
 QDF_STATUS wmi_unified_set_atf_cmd_send(void *wmi_hdl,
 				struct set_atf_params *param);
 
diff --git a/wmi/inc/wmi_unified_param.h b/wmi/inc/wmi_unified_param.h
index 220ac23f0313..8bd6c5607dae 100644
--- a/wmi/inc/wmi_unified_param.h
+++ b/wmi/inc/wmi_unified_param.h
@@ -3457,6 +3457,49 @@ typedef struct {
 	 */
 	uint32_t wlan_priority_gpio;
 
+	/* Host will notify target which coex algorithm has to be
+	 * enabled based on HW, FW capability and device tree config.
+	 * Till now the coex algorithms were target specific. Now the
+	 * same target can choose between multiple coex algorithms
+	 * depending on device tree config on host. For backward
+	 * compatibility, version support will have option 0 and will
+	 * rely on FW compile time flags to decide the coex version
+	 * between VERSION_1, VERSION_2 and VERSION_3. Version info is
+	 * mandatory from VERSION_4 onwards for any new coex algorithms.
+	 *
+	 * 0 = no version support
+	 * 1 = COEX_VERSION_1 (3 wire coex)
+	 * 2 = COEX_VERSION_2 (2.5 wire coex)
+	 * 3 = COEX_VERSION_3 (2.5 wire coex+duty cycle)
+	 * 4 = COEX_VERSION_4 (4 wire coex)
+	 */
+	uint32_t coex_version;
+
+	/* There are multiple coex implementations on FW to support different
+	 * hardwares. Since the coex algos are mutually exclusive, host will
+	 * use below fields to send GPIO info to FW and these GPIO pins will
+	 * have different usages depending on the feature enabled. This is to
+	 * avoid adding multiple GPIO fields here for different features.
+	 *
+	 * COEX VERSION_4 (4 wire coex) :
+	 * 4 wire coex feature uses 1 common input request line from BT/ZB/
+	 * Thread which interrupts the WLAN target processor directly, 1 input
+	 * priority line from BT and ZB each, 1 output line to grant access to
+	 * requesting IOT subsystem. WLAN uses the input priority line to
+	 * identify the requesting IOT subsystem. Request is granted based on
+	 * IOT interface priority and WLAN traffic. GPIO pin usage is as below:
+	 * coex_gpio_pin_1 = BT PRIORITY INPUT GPIO
+	 * coex_gpio_pin_2 = ZIGBEE PRIORITY INPUT GPIO
+	 * coex_gpio_pin_3 = GRANT OUTPUT GPIO
+	 * when a BT active interrupt is raised, WLAN reads
+	 * BT and ZB priority input GPIO pins to compare against the coex
+	 * priority table and accordingly sets the grant output GPIO to give
+	 * access to requesting IOT subsystem.
+	 */
+	uint32_t coex_gpio_pin_1;
+	uint32_t coex_gpio_pin_2;
+	uint32_t coex_gpio_pin_3;
+
 	/* add new members here */
 } wmi_host_ext_resource_config;
 
@@ -4276,6 +4319,25 @@ struct btcoex_cfg_params {
 	uint32_t wlan_duration;
 };
 
+#define WMI_HOST_COEX_CONFIG_BUF_MAX_LEN 32 /* 128 bytes */
+/**
+ * coex_ver_cfg_t
+ * @coex_version: Version for 4 wire coex
+ * @length: Length of payload buffer based on version
+ * @config_buf: Payload Buffer
+ */
+typedef struct {
+	/* VERSION_4 (4 wire coex) */
+	uint32_t coex_version;
+
+	/* No. of A_UINT32 elements in payload buffer. Will depend on the coex
+	 * version
+	 */
+	uint32_t length;
+
+	/* Payload buffer */
+	uint32_t config_buf[WMI_HOST_COEX_CONFIG_BUF_MAX_LEN];
+} coex_ver_cfg_t;
 
 #define WMI_HOST_RTT_REPORT_CFR	0
 #define WMI_HOST_RTT_NO_REPORT_CFR	1
@@ -5120,6 +5182,7 @@ typedef enum {
 	wmi_pdev_param_tx_chain_mask_1ss,
 	wmi_pdev_param_enable_btcoex,
 	wmi_pdev_param_atf_peer_stats,
+	wmi_pdev_param_btcoex_cfg,
 
 	wmi_pdev_param_max,
 } wmi_conv_pdev_params_id;
@@ -5339,6 +5402,7 @@ typedef enum {
 	wmi_service_tx_mode_dynamic,
 	wmi_service_check_cal_version,
 	wmi_service_btcoex_duty_cycle,
+	wmi_service_4_wire_coex_support,
 
 	wmi_services_max,
 } wmi_conv_service_ids;
diff --git a/wmi/inc/wmi_unified_priv.h b/wmi/inc/wmi_unified_priv.h
index 58d6c127d1a8..72a058e37450 100644
--- a/wmi/inc/wmi_unified_priv.h
+++ b/wmi/inc/wmi_unified_priv.h
@@ -996,6 +996,9 @@ QDF_STATUS
 (*send_btcoex_duty_cycle_cmd)(wmi_unified_t wmi_handle,
 			struct btcoex_cfg_params *param);
 
+QDF_STATUS
+(*send_coex_ver_cfg_cmd)(wmi_unified_t wmi_handle, coex_ver_cfg_t *param);
+
 QDF_STATUS (*extract_wds_addr_event)(wmi_unified_t wmi_handle,
 	void *evt_buf, uint16_t len, wds_addr_event_t *wds_ev);
 
diff --git a/wmi/src/wmi_unified_api.c b/wmi/src/wmi_unified_api.c
index 44d06e637e19..83d201d102e7 100644
--- a/wmi/src/wmi_unified_api.c
+++ b/wmi/src/wmi_unified_api.c
@@ -6555,6 +6555,27 @@ QDF_STATUS wmi_extract_pdev_utf_event(void *wmi_hdl,
 	return QDF_STATUS_E_FAILURE;
 }
 
+/**
+ * wmi_unified_send_coex_ver_cfg_cmd() - send coex ver cfg command
+ * @wmi_handle: wmi handle
+ * @param:      wmi coex ver cfg params
+ *
+ * Send WMI_COEX_VERSION_CFG_CMID parameters to fw.
+ *
+ * Return: QDF_STATUS_SUCCESS on success, QDF_STATUS_E_** on error
+ */
+QDF_STATUS wmi_unified_send_coex_ver_cfg_cmd(void *wmi_hdl,
+				coex_ver_cfg_t *param)
+{
+	wmi_unified_t wmi_handle = (wmi_unified_t) wmi_hdl;
+
+	if (wmi_handle->ops->send_coex_ver_cfg_cmd)
+		return wmi_handle->ops->send_coex_ver_cfg_cmd(wmi_handle,
+			param);
+
+	return QDF_STATUS_E_FAILURE;
+}
+
 /**
  * wmi_extract_peer_delete_response_event() -
  *       extract vdev id and peer mac addresse from peer delete response event
diff --git a/wmi/src/wmi_unified_non_tlv.c b/wmi/src/wmi_unified_non_tlv.c
index 98c303e2599d..fa5b0e55e75e 100644
--- a/wmi/src/wmi_unified_non_tlv.c
+++ b/wmi/src/wmi_unified_non_tlv.c
@@ -5216,6 +5216,40 @@ send_btcoex_duty_cycle_cmd_non_tlv(wmi_unified_t wmi_handle,
 
 	return QDF_STATUS_SUCCESS;
 }
+
+/**
+ * send_coex_ver_cfg_cmd_non_tlv() - send coex ver cfg
+ * @wmi_handle: wmi handle
+ * @param:     coex ver and configuration
+ *
+ * Return: 0 for success or error code
+ */
+QDF_STATUS
+send_coex_ver_cfg_cmd_non_tlv(wmi_unified_t wmi_handle, coex_ver_cfg_t *param)
+{
+	wmi_buf_t buf;
+	coex_ver_cfg_t *cmd;
+	int len = sizeof(wmi_coex_ver_cfg_cmd);
+
+	buf = wmi_buf_alloc(wmi_handle, len);
+	if (!buf) {
+		qdf_print("%s:wmi_buf_alloc failed\n", __func__);
+		return QDF_STATUS_E_FAILURE;
+	}
+	cmd = (coex_ver_cfg_t *)wmi_buf_data(buf);
+	cmd->coex_version = param->coex_version;
+	cmd->length = param->length;
+	qdf_mem_copy(cmd->config_buf, param->config_buf,
+		     sizeof(cmd->config_buf));
+	if (wmi_unified_cmd_send(wmi_handle, buf, len,
+				 WMI_COEX_VERSION_CFG_CMID)) {
+		wmi_buf_free(buf);
+		return QDF_STATUS_E_FAILURE;
+	}
+
+	return QDF_STATUS_SUCCESS;
+}
+
 /**
  * wmi_copy_resource_config_non_tlv() - copy resource configuration function
  * @param resource_cfg: pointer to resource configuration
@@ -7959,6 +7993,7 @@ struct wmi_ops non_tlv_ops =  {
 			send_pdev_caldata_version_check_cmd_non_tlv,
 	.send_btcoex_wlan_priority_cmd = send_btcoex_wlan_priority_cmd_non_tlv,
 	.send_btcoex_duty_cycle_cmd = send_btcoex_duty_cycle_cmd_non_tlv,
+	.send_coex_ver_cfg_cmd = send_coex_ver_cfg_cmd_non_tlv,
 
 	.get_target_cap_from_service_ready = extract_service_ready_non_tlv,
 	.extract_fw_version = extract_fw_version_non_tlv,
@@ -8120,6 +8155,8 @@ static void populate_non_tlv_service(uint32_t *wmi_service)
 				WMI_SERVICE_CHECK_CAL_VERSION;
 	wmi_service[wmi_service_btcoex_duty_cycle] =
 				WMI_SERVICE_BTCOEX_DUTY_CYCLE;
+	wmi_service[wmi_service_4_wire_coex_support] =
+				WMI_SERVICE_4_WIRE_COEX_SUPPORT;
 
 	wmi_service[wmi_service_roam_scan_offload] = WMI_SERVICE_UNAVAILABLE;
 	wmi_service[wmi_service_arpns_offload] = WMI_SERVICE_UNAVAILABLE;
diff --git a/wmi/src/wmi_unified_tlv.c b/wmi/src/wmi_unified_tlv.c
index 246a96331e77..c396f6787d48 100644
--- a/wmi/src/wmi_unified_tlv.c
+++ b/wmi/src/wmi_unified_tlv.c
@@ -14008,6 +14008,7 @@ static void populate_tlv_service(uint32_t *wmi_service)
 	wmi_service[wmi_service_tx_mode_push_pull] = WMI_SERVICE_UNAVAILABLE;
 	wmi_service[wmi_service_tx_mode_dynamic] = WMI_SERVICE_UNAVAILABLE;
 	wmi_service[wmi_service_btcoex_duty_cycle] = WMI_SERVICE_UNAVAILABLE;
+	wmi_service[wmi_service_4_wire_coex_support] = WMI_SERVICE_UNAVAILABLE;
 }
 
 /**