wireless: mwifiex: initial commit for Marvell mwifiex driver

This driver adds WiFi support for Marvell 802.11n based chipsets
with SDIO interface. Currently only SD8787 is supported. More
chipsets will be supported later.

drivers/net/wireless/mwifiex/

Signed-off-by: Nishant Sarmukadam <nishants@marvell.com>
Signed-off-by: Amitkumar Karwar <akarwar@marvell.com>
Signed-off-by: Kiran Divekar <dkiran@marvell.com>
Signed-off-by: Bing Zhao <bzhao@marvell.com>
Signed-off-by: Yogesh Ashok Powar <yogeshp@marvell.com>
Signed-off-by: Marc Yang <yangyang@marvell.com>
Signed-off-by: Ramesh Radhakrishnan <rramesh@marvell.com>
Signed-off-by: Frank Huang <frankh@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 1463 insertions, 0 deletions

diff --git a/drivers/net/wireless/mwifiex/cmdevt.c b/drivers/net/wireless/mwifiex/cmdevt.c
new file mode 100644
index 0000000..3a8fe1e
--- /dev/null
+++ b/drivers/net/wireless/mwifiex/cmdevt.c
@@ -0,0 +1,1463 @@
+/*
+ * Marvell Wireless LAN device driver: commands and events
+ *
+ * Copyright (C) 2011, Marvell International Ltd.
+ *
+ * This software file (the "File") is distributed by Marvell International
+ * Ltd. under the terms of the GNU General Public License Version 2, June 1991
+ * (the "License").  You may use, redistribute and/or modify this File in
+ * accordance with the terms and conditions of the License, a copy of which
+ * is available by writing to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
+ * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
+ *
+ * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
+ * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
+ * this warranty disclaimer.
+ */
+
+#include "decl.h"
+#include "ioctl.h"
+#include "util.h"
+#include "fw.h"
+#include "main.h"
+#include "wmm.h"
+#include "11n.h"
+
+/*
+ * This function initializes a command node.
+ *
+ * The actual allocation of the node is not done by this function. It only
+ * initiates a node by filling it with default parameters. Similarly,
+ * allocation of the different buffers used (IOCTL buffer, data buffer) are
+ * not done by this function either.
+ */
+static void
+mwifiex_init_cmd_node(struct mwifiex_private *priv,
+		      struct cmd_ctrl_node *cmd_node,
+		      u32 cmd_oid, void *wait_queue, void *data_buf)
+{
+	cmd_node->priv = priv;
+	cmd_node->cmd_oid = cmd_oid;
+	cmd_node->wq_buf = wait_queue;
+	cmd_node->data_buf = data_buf;
+	cmd_node->cmd_skb = cmd_node->skb;
+}
+
+/*
+ * This function returns a command node from the free queue depending upon
+ * availability.
+ */
+static struct cmd_ctrl_node *
+mwifiex_get_cmd_node(struct mwifiex_adapter *adapter)
+{
+	struct cmd_ctrl_node *cmd_node;
+	unsigned long flags;
+
+	spin_lock_irqsave(&adapter->cmd_free_q_lock, flags);
+	if (list_empty(&adapter->cmd_free_q)) {
+		dev_err(adapter->dev, "GET_CMD_NODE: cmd node not available\n");
+		spin_unlock_irqrestore(&adapter->cmd_free_q_lock, flags);
+		return NULL;
+	}
+	cmd_node = list_first_entry(&adapter->cmd_free_q,
+			struct cmd_ctrl_node, list);
+	list_del(&cmd_node->list);
+	spin_unlock_irqrestore(&adapter->cmd_free_q_lock, flags);
+
+	return cmd_node;
+}
+
+/*
+ * This function cleans up a command node.
+ *
+ * The function resets the fields including the buffer pointers.
+ * This function does not try to free the buffers. They must be
+ * freed before calling this function.
+ *
+ * This function will however call the receive completion callback
+ * in case a response buffer is still available before resetting
+ * the pointer.
+ */
+static void
+mwifiex_clean_cmd_node(struct mwifiex_adapter *adapter,
+		       struct cmd_ctrl_node *cmd_node)
+{
+	cmd_node->cmd_oid = 0;
+	cmd_node->cmd_flag = 0;
+	cmd_node->wq_buf = NULL;
+	cmd_node->data_buf = NULL;
+
+	if (cmd_node->resp_skb) {
+		mwifiex_recv_complete(adapter, cmd_node->resp_skb, 0);
+		cmd_node->resp_skb = NULL;
+	}
+
+	return;
+}
+
+/*
+ * This function returns a command node from the pending queue which
+ * matches the given IOCTL request.
+ */
+static struct cmd_ctrl_node *
+mwifiex_get_pending_ioctl_cmd(struct mwifiex_adapter *adapter,
+			      struct mwifiex_wait_queue *wait_queue)
+{
+	unsigned long flags;
+	struct cmd_ctrl_node *cmd_node;
+
+	spin_lock_irqsave(&adapter->cmd_pending_q_lock, flags);
+	list_for_each_entry(cmd_node, &adapter->cmd_pending_q, list) {
+		if (cmd_node->wq_buf == wait_queue) {
+			spin_unlock_irqrestore(&adapter->cmd_pending_q_lock,
+					       flags);
+			return cmd_node;
+		}
+	}
+	spin_unlock_irqrestore(&adapter->cmd_pending_q_lock, flags);
+
+	return NULL;
+}
+
+/*
+ * This function sends a host command to the firmware.
+ *
+ * The function copies the host command into the driver command
+ * buffer, which will be transferred to the firmware later by the
+ * main thread.
+ */
+static int mwifiex_cmd_host_cmd(struct mwifiex_private *priv,
+				struct host_cmd_ds_command *cmd, void *data_buf)
+{
+	struct mwifiex_ds_misc_cmd *pcmd_ptr =
+		(struct mwifiex_ds_misc_cmd *) data_buf;
+
+	/* Copy the HOST command to command buffer */
+	memcpy((void *) cmd, pcmd_ptr->cmd, pcmd_ptr->len);
+	dev_dbg(priv->adapter->dev, "cmd: host cmd size = %d\n", pcmd_ptr->len);
+	return 0;
+}
+
+/*
+ * This function downloads a command to the firmware.
+ *
+ * The function performs sanity tests, sets the command sequence
+ * number and size, converts the header fields to CPU format before
+ * sending. Afterwards, it logs the command ID and action for debugging
+ * and sets up the command timeout timer.
+ */
+static int mwifiex_dnld_cmd_to_fw(struct mwifiex_private *priv,
+				  struct cmd_ctrl_node *cmd_node)
+{
+
+	struct mwifiex_adapter *adapter = priv->adapter;
+	int ret = 0;
+	struct host_cmd_ds_command *host_cmd;
+	struct mwifiex_wait_queue *wait_queue = NULL;
+	uint16_t cmd_code;
+	uint16_t cmd_size;
+	struct timeval tstamp;
+	unsigned long flags;
+
+	if (!adapter || !cmd_node)
+		return -1;
+
+	host_cmd = (struct host_cmd_ds_command *) (cmd_node->cmd_skb->data);
+	if (cmd_node->wq_buf)
+		wait_queue = (struct mwifiex_wait_queue *) cmd_node->wq_buf;
+
+	/* Sanity test */
+	if (host_cmd == NULL || host_cmd->size == 0) {
+		dev_err(adapter->dev, "DNLD_CMD: host_cmd is null"
+			" or cmd size is 0, not sending\n");
+		if (wait_queue)
+			wait_queue->status = MWIFIEX_ERROR_CMD_DNLD_FAIL;
+		mwifiex_insert_cmd_to_free_q(adapter, cmd_node);
+		return -1;
+	}
+
+	/* Set command sequence number */
+	adapter->seq_num++;
+	host_cmd->seq_num = cpu_to_le16(HostCmd_SET_SEQ_NO_BSS_INFO
+			    (adapter->seq_num, cmd_node->priv->bss_num,
+			     cmd_node->priv->bss_type));
+
+	spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
+	adapter->curr_cmd = cmd_node;
+	spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
+
+	cmd_code = le16_to_cpu(host_cmd->command);
+	cmd_size = le16_to_cpu(host_cmd->size);
+
+	skb_trim(cmd_node->cmd_skb, cmd_size);
+
+	do_gettimeofday(&tstamp);
+	dev_dbg(adapter->dev, "cmd: DNLD_CMD: (%lu.%lu): %#x, act %#x, len %d,"
+		" seqno %#x\n",
+		tstamp.tv_sec, tstamp.tv_usec, cmd_code,
+	       le16_to_cpu(*(__le16 *) ((u8 *) host_cmd + S_DS_GEN)), cmd_size,
+	       le16_to_cpu(host_cmd->seq_num));
+
+	skb_push(cmd_node->cmd_skb, INTF_HEADER_LEN);
+
+	ret = adapter->if_ops.host_to_card(adapter, MWIFIEX_TYPE_CMD,
+					     cmd_node->cmd_skb->data,
+					     cmd_node->cmd_skb->len, NULL);
+
+	if (ret == -1) {
+		dev_err(adapter->dev, "DNLD_CMD: host to card failed\n");
+		if (wait_queue)
+			wait_queue->status = MWIFIEX_ERROR_CMD_DNLD_FAIL;
+		mwifiex_insert_cmd_to_free_q(adapter, adapter->curr_cmd);
+
+		spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
+		adapter->curr_cmd = NULL;
+		spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
+
+		adapter->dbg.num_cmd_host_to_card_failure++;
+		return -1;
+	}
+
+	/* Save the last command id and action to debug log */
+	adapter->dbg.last_cmd_index =
+		(adapter->dbg.last_cmd_index + 1) % DBG_CMD_NUM;
+	adapter->dbg.last_cmd_id[adapter->dbg.last_cmd_index] = cmd_code;
+	adapter->dbg.last_cmd_act[adapter->dbg.last_cmd_index] =
+		le16_to_cpu(*(__le16 *) ((u8 *) host_cmd + S_DS_GEN));
+
+	/* Clear BSS_NO_BITS from HostCmd */
+	cmd_code &= HostCmd_CMD_ID_MASK;
+
+	/* Setup the timer after transmit command */
+	mod_timer(&adapter->cmd_timer,
+		jiffies + (MWIFIEX_TIMER_10S * HZ) / 1000);
+
+	return 0;
+}
+
+/*
+ * This function downloads a sleep confirm command to the firmware.
+ *
+ * The function performs sanity tests, sets the command sequence
+ * number and size, converts the header fields to CPU format before
+ * sending.
+ *
+ * No responses are needed for sleep confirm command.
+ */
+static int mwifiex_dnld_sleep_confirm_cmd(struct mwifiex_adapter *adapter)
+{
+	int ret = 0;
+	u16 cmd_len = 0;
+	struct mwifiex_private *priv;
+	struct mwifiex_opt_sleep_confirm_buffer *sleep_cfm_buf =
+				(struct mwifiex_opt_sleep_confirm_buffer *)
+				adapter->sleep_cfm->data;
+	cmd_len = sizeof(struct mwifiex_opt_sleep_confirm);
+	priv = mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY);
+
+	sleep_cfm_buf->ps_cfm_sleep.seq_num =
+		cpu_to_le16((HostCmd_SET_SEQ_NO_BSS_INFO
+					(adapter->seq_num, priv->bss_num,
+					 priv->bss_type)));
+	adapter->seq_num++;
+
+	ret = adapter->if_ops.host_to_card(adapter, MWIFIEX_TYPE_CMD,
+					     adapter->sleep_cfm->data,
+					     adapter->sleep_cfm->len +
+					     INTF_HEADER_LEN, NULL);
+
+	if (ret == -1) {
+		dev_err(adapter->dev, "SLEEP_CFM: failed\n");
+		adapter->dbg.num_cmd_sleep_cfm_host_to_card_failure++;
+		return -1;
+	}
+	if (GET_BSS_ROLE(mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY))
+			== MWIFIEX_BSS_ROLE_STA) {
+		if (!sleep_cfm_buf->ps_cfm_sleep.sleep_cfm.resp_ctrl)
+			/* Response is not needed for sleep
+			   confirm command */
+			adapter->ps_state = PS_STATE_SLEEP;
+		else
+			adapter->ps_state = PS_STATE_SLEEP_CFM;
+
+		if (!sleep_cfm_buf->ps_cfm_sleep.sleep_cfm.resp_ctrl
+				&& (adapter->is_hs_configured
+					&& !adapter->sleep_period.period)) {
+			adapter->pm_wakeup_card_req = true;
+			mwifiex_hs_activated_event(mwifiex_get_priv(adapter,
+						MWIFIEX_BSS_ROLE_STA), true);
+		}
+	}
+
+	return ret;
+}
+
+/*
+ * This function allocates the command buffers and links them to
+ * the command free queue.
+ *
+ * The driver uses a pre allocated number of command buffers, which
+ * are created at driver initializations and freed at driver cleanup.
+ * Every command needs to obtain a command buffer from this pool before
+ * it can be issued. The command free queue lists the command buffers
+ * currently free to use, while the command pending queue lists the
+ * command buffers already in use and awaiting handling. Command buffers
+ * are returned to the free queue after use.
+ */
+int mwifiex_alloc_cmd_buffer(struct mwifiex_adapter *adapter)
+{
+	struct cmd_ctrl_node *cmd_array;
+	u32 buf_size;
+	u32 i;
+
+	/* Allocate and initialize struct cmd_ctrl_node */
+	buf_size = sizeof(struct cmd_ctrl_node) * MWIFIEX_NUM_OF_CMD_BUFFER;
+	cmd_array = kzalloc(buf_size, GFP_KERNEL);
+	if (!cmd_array) {
+		dev_err(adapter->dev, "%s: failed to alloc cmd_array\n",
+				__func__);
+		return -1;
+	}
+
+	adapter->cmd_pool = cmd_array;
+	memset(adapter->cmd_pool, 0, buf_size);
+
+	/* Allocate and initialize command buffers */
+	for (i = 0; i < MWIFIEX_NUM_OF_CMD_BUFFER; i++) {
+		cmd_array[i].skb = dev_alloc_skb(MWIFIEX_SIZE_OF_CMD_BUFFER);
+		if (!cmd_array[i].skb) {
+			dev_err(adapter->dev, "ALLOC_CMD_BUF: out of memory\n");
+			return -1;
+		}
+	}
+
+	for (i = 0; i < MWIFIEX_NUM_OF_CMD_BUFFER; i++)
+		mwifiex_insert_cmd_to_free_q(adapter, &cmd_array[i]);
+
+	return 0;
+}
+
+/*
+ * This function frees the command buffers.
+ *
+ * The function calls the completion callback for all the command
+ * buffers that still have response buffers associated with them.
+ */
+int mwifiex_free_cmd_buffer(struct mwifiex_adapter *adapter)
+{
+	struct cmd_ctrl_node *cmd_array;
+	u32 i;
+
+	/* Need to check if cmd pool is allocated or not */
+	if (!adapter->cmd_pool) {
+		dev_dbg(adapter->dev, "info: FREE_CMD_BUF: cmd_pool is null\n");
+		return 0;
+	}
+
+	cmd_array = adapter->cmd_pool;
+
+	/* Release shared memory buffers */
+	for (i = 0; i < MWIFIEX_NUM_OF_CMD_BUFFER; i++) {
+		if (cmd_array[i].skb) {
+			dev_dbg(adapter->dev, "cmd: free cmd buffer %d\n", i);
+			dev_kfree_skb_any(cmd_array[i].skb);
+		}
+		if (!cmd_array[i].resp_skb)
+			continue;
+		mwifiex_recv_complete(adapter, cmd_array[i].resp_skb, 0);
+	}
+	/* Release struct cmd_ctrl_node */
+	if (adapter->cmd_pool) {
+		dev_dbg(adapter->dev, "cmd: free cmd pool\n");
+		kfree(adapter->cmd_pool);
+		adapter->cmd_pool = NULL;
+	}
+
+	return 0;
+}
+
+/*
+ * This function handles events generated by firmware.
+ *
+ * Event body of events received from firmware are not used (though they are
+ * saved), only the event ID is used. Some events are re-invoked by
+ * the driver, with a new event body.
+ *
+ * After processing, the function calls the completion callback
+ * for cleanup.
+ */
+int mwifiex_process_event(struct mwifiex_adapter *adapter)
+{
+	int ret = 0;
+	struct mwifiex_private *priv =
+		mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY);
+	struct sk_buff *skb = adapter->event_skb;
+	u32 eventcause = adapter->event_cause;
+	struct timeval tstamp;
+	struct mwifiex_rxinfo *rx_info = NULL;
+
+	/* Save the last event to debug log */
+	adapter->dbg.last_event_index =
+		(adapter->dbg.last_event_index + 1) % DBG_CMD_NUM;
+	adapter->dbg.last_event[adapter->dbg.last_event_index] =
+		(u16) eventcause;
+
+	/* Get BSS number and corresponding priv */
+	priv = mwifiex_get_priv_by_id(adapter, EVENT_GET_BSS_NUM(eventcause),
+				      EVENT_GET_BSS_TYPE(eventcause));
+	if (!priv)
+		priv = mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY);
+	/* Clear BSS_NO_BITS from event */
+	eventcause &= EVENT_ID_MASK;
+	adapter->event_cause = eventcause;
+
+	if (skb) {
+		rx_info = MWIFIEX_SKB_RXCB(skb);
+		rx_info->bss_index = priv->bss_index;
+	}
+
+	if (eventcause != EVENT_PS_SLEEP && eventcause != EVENT_PS_AWAKE) {
+		do_gettimeofday(&tstamp);
+		dev_dbg(adapter->dev, "event: %lu.%lu: cause: %#x\n",
+		       tstamp.tv_sec, tstamp.tv_usec, eventcause);
+	}
+
+	ret = mwifiex_process_sta_event(priv);
+
+	adapter->event_cause = 0;
+	adapter->event_skb = NULL;
+
+	mwifiex_recv_complete(adapter, skb, 0);
+
+	return ret;
+}
+
+/*
+ * This function prepares a command before sending it to the firmware.
+ *
+ * Preparation includes -
+ *      - Sanity tests to make sure the card is still present or the FW
+ *        is not reset
+ *      - Getting a new command node from the command free queue
+ *      - Initializing the command node for default parameters
+ *      - Fill up the non-default parameters and buffer pointers
+ *      - Add the command to pending queue
+ */
+int mwifiex_prepare_cmd(struct mwifiex_private *priv, uint16_t cmd_no,
+			u16 cmd_action, u32 cmd_oid,
+			void *wait_queue, void *data_buf)
+{
+	int ret = 0;
+	struct mwifiex_adapter *adapter = priv->adapter;
+	struct cmd_ctrl_node *cmd_node = NULL;
+	struct host_cmd_ds_command *cmd_ptr = NULL;
+
+	if (!adapter) {
+		pr_err("PREP_CMD: adapter is NULL\n");
+		return -1;
+	}
+
+	if (adapter->is_suspended) {
+		dev_err(adapter->dev, "PREP_CMD: device in suspended state\n");
+		return -1;
+	}
+
+	if (adapter->surprise_removed) {
+		dev_err(adapter->dev, "PREP_CMD: card is removed\n");
+		return -1;
+	}
+
+	if (adapter->hw_status == MWIFIEX_HW_STATUS_RESET) {
+		if (cmd_no != HostCmd_CMD_FUNC_INIT) {
+			dev_err(adapter->dev, "PREP_CMD: FW in reset state\n");
+			return -1;
+		}
+	}
+
+	/* Get a new command node */
+	cmd_node = mwifiex_get_cmd_node(adapter);
+
+	if (!cmd_node) {
+		dev_err(adapter->dev, "PREP_CMD: no free cmd node\n");
+		return -1;
+	}
+
+	/* Initialize the command node */
+	mwifiex_init_cmd_node(priv, cmd_node, cmd_oid, wait_queue, data_buf);
+
+	if (!cmd_node->cmd_skb) {
+		dev_err(adapter->dev, "PREP_CMD: no free cmd buf\n");
+		return -1;
+	}
+
+	memset(skb_put(cmd_node->cmd_skb, sizeof(struct host_cmd_ds_command)),
+	       0, sizeof(struct host_cmd_ds_command));
+
+	cmd_ptr = (struct host_cmd_ds_command *) (cmd_node->cmd_skb->data);
+	cmd_ptr->command = cpu_to_le16(cmd_no);
+	cmd_ptr->result = 0;
+
+	/* Prepare command */
+	if (cmd_no) {
+		ret = mwifiex_sta_prepare_cmd(priv, cmd_no, cmd_action,
+					      cmd_oid, data_buf, cmd_ptr);
+	} else {
+		ret = mwifiex_cmd_host_cmd(priv, cmd_ptr, data_buf);
+		cmd_node->cmd_flag |= CMD_F_HOSTCMD;
+	}
+
+	/* Return error, since the command preparation failed */
+	if (ret) {
+		dev_err(adapter->dev, "PREP_CMD: cmd %#x preparation failed\n",
+							cmd_no);
+		mwifiex_insert_cmd_to_free_q(adapter, cmd_node);
+		return -1;
+	}
+
+	/* Send command */
+	if (cmd_no == HostCmd_CMD_802_11_SCAN)
+		mwifiex_queue_scan_cmd(priv, cmd_node);
+	else
+		mwifiex_insert_cmd_to_pending_q(adapter, cmd_node, true);
+
+	return ret;
+}
+
+/*
+ * This function returns a command to the command free queue.
+ *
+ * The function also calls the completion callback if required, before
+ * cleaning the command node and re-inserting it into the free queue.
+ */
+void
+mwifiex_insert_cmd_to_free_q(struct mwifiex_adapter *adapter,
+			     struct cmd_ctrl_node *cmd_node)
+{
+	struct mwifiex_wait_queue *wait_queue = NULL;
+	unsigned long flags;
+
+	if (cmd_node == NULL)
+		return;
+	if (cmd_node->wq_buf) {
+		wait_queue = (struct mwifiex_wait_queue *) cmd_node->wq_buf;
+		if (wait_queue->status != MWIFIEX_ERROR_NO_ERROR)
+			mwifiex_ioctl_complete(adapter, wait_queue, -1);
+		else
+			mwifiex_ioctl_complete(adapter, wait_queue, 0);
+	}
+	/* Clean the node */
+	mwifiex_clean_cmd_node(adapter, cmd_node);
+
+	/* Insert node into cmd_free_q */
+	spin_lock_irqsave(&adapter->cmd_free_q_lock, flags);
+	list_add_tail(&cmd_node->list, &adapter->cmd_free_q);
+	spin_unlock_irqrestore(&adapter->cmd_free_q_lock, flags);
+
+	return;
+}
+
+/*
+ * This function queues a command to the command pending queue.
+ *
+ * This in effect adds the command to the command list to be executed.
+ * Exit PS command is handled specially, by placing it always to the
+ * front of the command queue.
+ */
+void
+mwifiex_insert_cmd_to_pending_q(struct mwifiex_adapter *adapter,
+				struct cmd_ctrl_node *cmd_node, u32 add_tail)
+{
+	struct host_cmd_ds_command *host_cmd = NULL;
+	u16 command;
+	unsigned long flags;
+
+	host_cmd = (struct host_cmd_ds_command *) (cmd_node->cmd_skb->data);
+	if (!host_cmd) {
+		dev_err(adapter->dev, "QUEUE_CMD: host_cmd is NULL\n");
+		return;
+	}
+
+	command = le16_to_cpu(host_cmd->command);
+
+	/* Exit_PS command needs to be queued in the header always. */
+	if (command == HostCmd_CMD_802_11_PS_MODE_ENH) {
+		struct host_cmd_ds_802_11_ps_mode_enh *pm =
+			&host_cmd->params.psmode_enh;
+		if ((le16_to_cpu(pm->action) == DIS_PS)
+		    || (le16_to_cpu(pm->action) == DIS_AUTO_PS)) {
+			if (adapter->ps_state != PS_STATE_AWAKE)
+				add_tail = false;
+		}
+	}
+
+	spin_lock_irqsave(&adapter->cmd_pending_q_lock, flags);
+	if (add_tail)
+		list_add_tail(&cmd_node->list, &adapter->cmd_pending_q);
+	else
+		list_add(&cmd_node->list, &adapter->cmd_pending_q);
+	spin_unlock_irqrestore(&adapter->cmd_pending_q_lock, flags);
+
+	dev_dbg(adapter->dev, "cmd: QUEUE_CMD: cmd=%#x is queued\n", command);
+
+	return;
+}
+
+/*
+ * This function executes the next command in command pending queue.
+ *
+ * This function will fail if a command is already in processing stage,
+ * otherwise it will dequeue the first command from the command pending
+ * queue and send to the firmware.
+ *
+ * If the device is currently in host sleep mode, any commands, except the
+ * host sleep configuration command will de-activate the host sleep. For PS
+ * mode, the function will put the firmware back to sleep if applicable.
+ */
+int mwifiex_exec_next_cmd(struct mwifiex_adapter *adapter)
+{
+	struct mwifiex_private *priv = NULL;
+	struct cmd_ctrl_node *cmd_node = NULL;
+	int ret = 0;
+	struct host_cmd_ds_command *host_cmd;
+	unsigned long cmd_flags;
+	unsigned long cmd_pending_q_flags;
+
+	/* Check if already in processing */
+	if (adapter->curr_cmd) {
+		dev_err(adapter->dev, "EXEC_NEXT_CMD: cmd in processing\n");
+		return -1;
+	}
+
+	spin_lock_irqsave(&adapter->mwifiex_cmd_lock, cmd_flags);
+	/* Check if any command is pending */
+	spin_lock_irqsave(&adapter->cmd_pending_q_lock, cmd_pending_q_flags);
+	if (list_empty(&adapter->cmd_pending_q)) {
+		spin_unlock_irqrestore(&adapter->cmd_pending_q_lock,
+				       cmd_pending_q_flags);
+		spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, cmd_flags);
+		return 0;
+	}
+	cmd_node = list_first_entry(&adapter->cmd_pending_q,
+				    struct cmd_ctrl_node, list);
+	spin_unlock_irqrestore(&adapter->cmd_pending_q_lock,
+			       cmd_pending_q_flags);
+
+	host_cmd = (struct host_cmd_ds_command *) (cmd_node->cmd_skb->data);
+	priv = cmd_node->priv;
+
+	if (adapter->ps_state != PS_STATE_AWAKE) {
+		dev_err(adapter->dev, "%s: cannot send cmd in sleep state,"
+				" this should not happen\n", __func__);
+		spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, cmd_flags);
+		return ret;
+	}
+
+	spin_lock_irqsave(&adapter->cmd_pending_q_lock, cmd_pending_q_flags);
+	list_del(&cmd_node->list);
+	spin_unlock_irqrestore(&adapter->cmd_pending_q_lock,
+			       cmd_pending_q_flags);
+
+	spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, cmd_flags);
+	ret = mwifiex_dnld_cmd_to_fw(priv, cmd_node);
+	priv = mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY);
+	/* Any command sent to the firmware when host is in sleep
+	 * mode should de-configure host sleep. We should skip the
+	 * host sleep configuration command itself though
+	 */
+	if (priv && (host_cmd->command !=
+	     cpu_to_le16(HostCmd_CMD_802_11_HS_CFG_ENH))) {
+		if (adapter->hs_activated) {
+			adapter->is_hs_configured = false;
+			mwifiex_hs_activated_event(priv, false);
+		}
+	}
+
+	return ret;
+}
+
+/*
+ * This function handles the command response.
+ *
+ * After processing, the function cleans the command node and puts
+ * it back to the command free queue.
+ */
+int mwifiex_process_cmdresp(struct mwifiex_adapter *adapter)
+{
+	struct host_cmd_ds_command *resp = NULL;
+	struct mwifiex_private *priv =
+		mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY);
+	int ret = 0;
+	uint16_t orig_cmdresp_no;
+	uint16_t cmdresp_no;
+	uint16_t cmdresp_result;
+	struct mwifiex_wait_queue *wait_queue = NULL;
+	struct timeval tstamp;
+	unsigned long flags;
+
+	/* Now we got response from FW, cancel the command timer */
+	del_timer(&adapter->cmd_timer);
+
+	if (!adapter->curr_cmd || !adapter->curr_cmd->resp_skb) {
+		resp = (struct host_cmd_ds_command *) adapter->upld_buf;
+		dev_err(adapter->dev, "CMD_RESP: NULL curr_cmd, %#x\n",
+		       le16_to_cpu(resp->command));
+		return -1;
+	}
+
+	if (adapter->curr_cmd->wq_buf)
+		wait_queue = (struct mwifiex_wait_queue *)
+				adapter->curr_cmd->wq_buf;
+
+	adapter->num_cmd_timeout = 0;
+
+	resp = (struct host_cmd_ds_command *) adapter->curr_cmd->resp_skb->data;
+	if (adapter->curr_cmd->cmd_flag & CMD_F_CANCELED) {
+		dev_err(adapter->dev, "CMD_RESP: %#x been canceled\n",
+				le16_to_cpu(resp->command));
+		mwifiex_insert_cmd_to_free_q(adapter, adapter->curr_cmd);
+		spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
+		adapter->curr_cmd = NULL;
+		spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
+		return -1;
+	}
+
+	if (adapter->curr_cmd->cmd_flag & CMD_F_HOSTCMD) {
+		/* Copy original response back to response buffer */
+		struct mwifiex_ds_misc_cmd *hostcmd = NULL;
+		uint16_t size = le16_to_cpu(resp->size);
+		dev_dbg(adapter->dev, "info: host cmd resp size = %d\n", size);
+		size = min_t(u16, size, MWIFIEX_SIZE_OF_CMD_BUFFER);
+		if (adapter->curr_cmd->data_buf) {
+			hostcmd = (struct mwifiex_ds_misc_cmd *)
+						adapter->curr_cmd->data_buf;
+			hostcmd->len = size;
+			memcpy(hostcmd->cmd, (void *) resp, size);
+		}
+	}
+	orig_cmdresp_no = le16_to_cpu(resp->command);
+
+	/* Get BSS number and corresponding priv */
+	priv = mwifiex_get_priv_by_id(adapter,
+			HostCmd_GET_BSS_NO(le16_to_cpu(resp->seq_num)),
+			HostCmd_GET_BSS_TYPE(le16_to_cpu(resp->seq_num)));
+	if (!priv)
+		priv = mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY);
+	/* Clear RET_BIT from HostCmd */
+	resp->command = cpu_to_le16(orig_cmdresp_no & HostCmd_CMD_ID_MASK);
+
+	cmdresp_no = le16_to_cpu(resp->command);
+	cmdresp_result = le16_to_cpu(resp->result);
+
+	/* Save the last command response to debug log */
+	adapter->dbg.last_cmd_resp_index =
+		(adapter->dbg.last_cmd_resp_index + 1) % DBG_CMD_NUM;
+	adapter->dbg.last_cmd_resp_id[adapter->dbg.last_cmd_resp_index] =
+		orig_cmdresp_no;
+
+	do_gettimeofday(&tstamp);
+	dev_dbg(adapter->dev, "cmd: CMD_RESP: (%lu.%lu): 0x%x, result %d,"
+		" len %d, seqno 0x%x\n",
+	       tstamp.tv_sec, tstamp.tv_usec, orig_cmdresp_no, cmdresp_result,
+	       le16_to_cpu(resp->size), le16_to_cpu(resp->seq_num));
+
+	if (!(orig_cmdresp_no & HostCmd_RET_BIT)) {
+		dev_err(adapter->dev, "CMD_RESP: invalid cmd resp\n");
+		if (wait_queue)
+			wait_queue->status = MWIFIEX_ERROR_FW_CMDRESP;
+
+		mwifiex_insert_cmd_to_free_q(adapter, adapter->curr_cmd);
+		spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
+		adapter->curr_cmd = NULL;
+		spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
+		return -1;
+	}
+
+	if (adapter->curr_cmd->cmd_flag & CMD_F_HOSTCMD) {
+		adapter->curr_cmd->cmd_flag &= ~CMD_F_HOSTCMD;
+		if ((cmdresp_result == HostCmd_RESULT_OK)
+		    && (cmdresp_no == HostCmd_CMD_802_11_HS_CFG_ENH))
+			ret = mwifiex_ret_802_11_hs_cfg(priv, resp);
+	} else {
+		/* handle response */
+		ret = mwifiex_process_sta_cmdresp(priv, cmdresp_no, resp,
+						  wait_queue);
+	}
+
+	/* Check init command response */
+	if (adapter->hw_status == MWIFIEX_HW_STATUS_INITIALIZING) {
+		if (ret == -1) {
+			dev_err(adapter->dev, "%s: cmd %#x failed during "
+				"initialization\n", __func__, cmdresp_no);
+			mwifiex_init_fw_complete(adapter);
+			return -1;
+		} else if (adapter->last_init_cmd == cmdresp_no)
+			adapter->hw_status = MWIFIEX_HW_STATUS_INIT_DONE;
+	}
+
+	if (adapter->curr_cmd) {
+		if (wait_queue && (!ret))
+			wait_queue->status = MWIFIEX_ERROR_NO_ERROR;
+		else if (wait_queue && (ret == -1))
+			wait_queue->status = MWIFIEX_ERROR_CMD_RESP_FAIL;
+
+		/* Clean up and put current command back to cmd_free_q */
+		mwifiex_insert_cmd_to_free_q(adapter, adapter->curr_cmd);
+
+		spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
+		adapter->curr_cmd = NULL;
+		spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
+	}
+
+	return ret;
+}
+
+/*
+ * This function handles the timeout of command sending.
+ *
+ * It will re-send the same command again.
+ */
+void
+mwifiex_cmd_timeout_func(unsigned long function_context)
+{
+	struct mwifiex_adapter *adapter =
+		(struct mwifiex_adapter *) function_context;
+	struct cmd_ctrl_node *cmd_node = NULL;
+	struct mwifiex_wait_queue *wait_queue = NULL;
+	struct timeval tstamp;
+
+	adapter->num_cmd_timeout++;
+	adapter->dbg.num_cmd_timeout++;
+	if (!adapter->curr_cmd) {
+		dev_dbg(adapter->dev, "cmd: empty curr_cmd\n");
+		return;
+	}
+	cmd_node = adapter->curr_cmd;
+	if (cmd_node->wq_buf) {
+		wait_queue = (struct mwifiex_wait_queue *) cmd_node->wq_buf;
+		wait_queue->status = MWIFIEX_ERROR_CMD_TIMEOUT;
+	}
+
+	if (cmd_node) {
+		adapter->dbg.timeout_cmd_id =
+			adapter->dbg.last_cmd_id[adapter->dbg.last_cmd_index];
+		adapter->dbg.timeout_cmd_act =
+			adapter->dbg.last_cmd_act[adapter->dbg.last_cmd_index];
+		do_gettimeofday(&tstamp);
+		dev_err(adapter->dev, "%s: Timeout cmd id (%lu.%lu) = %#x,"
+			" act = %#x\n", __func__,
+		       tstamp.tv_sec, tstamp.tv_usec,
+		       adapter->dbg.timeout_cmd_id,
+		       adapter->dbg.timeout_cmd_act);
+
+		dev_err(adapter->dev, "num_data_h2c_failure = %d\n",
+		       adapter->dbg.num_tx_host_to_card_failure);
+		dev_err(adapter->dev, "num_cmd_h2c_failure = %d\n",
+		       adapter->dbg.num_cmd_host_to_card_failure);
+
+		dev_err(adapter->dev, "num_cmd_timeout = %d\n",
+		       adapter->dbg.num_cmd_timeout);
+		dev_err(adapter->dev, "num_tx_timeout = %d\n",
+		       adapter->dbg.num_tx_timeout);
+
+		dev_err(adapter->dev, "last_cmd_index = %d\n",
+		       adapter->dbg.last_cmd_index);
+		print_hex_dump_bytes("last_cmd_id: ", DUMP_PREFIX_OFFSET,
+				adapter->dbg.last_cmd_id, DBG_CMD_NUM);
+		print_hex_dump_bytes("last_cmd_act: ", DUMP_PREFIX_OFFSET,
+				adapter->dbg.last_cmd_act, DBG_CMD_NUM);
+
+		dev_err(adapter->dev, "last_cmd_resp_index = %d\n",
+		       adapter->dbg.last_cmd_resp_index);
+		print_hex_dump_bytes("last_cmd_resp_id: ", DUMP_PREFIX_OFFSET,
+				adapter->dbg.last_cmd_resp_id, DBG_CMD_NUM);
+
+		dev_err(adapter->dev, "last_event_index = %d\n",
+		       adapter->dbg.last_event_index);
+		print_hex_dump_bytes("last_event: ", DUMP_PREFIX_OFFSET,
+				adapter->dbg.last_event, DBG_CMD_NUM);
+
+		dev_err(adapter->dev, "data_sent=%d cmd_sent=%d\n",
+		       adapter->data_sent, adapter->cmd_sent);
+
+		dev_err(adapter->dev, "ps_mode=%d ps_state=%d\n",
+				adapter->ps_mode, adapter->ps_state);
+	}
+	if (adapter->hw_status == MWIFIEX_HW_STATUS_INITIALIZING)
+		mwifiex_init_fw_complete(adapter);
+
+	return;
+}
+
+/*
+ * This function cancels all the pending commands.
+ *
+ * The current command, all commands in command pending queue and all scan
+ * commands in scan pending queue are cancelled. All the completion callbacks
+ * are called with failure status to ensure cleanup.
+ */
+void
+mwifiex_cancel_all_pending_cmd(struct mwifiex_adapter *adapter)
+{
+	struct cmd_ctrl_node *cmd_node = NULL, *tmp_node = NULL;
+	struct mwifiex_wait_queue *wait_queue = NULL;
+	unsigned long flags;
+
+	/* Cancel current cmd */
+	if ((adapter->curr_cmd) && (adapter->curr_cmd->wq_buf)) {
+		wait_queue =
+			(struct mwifiex_wait_queue *) adapter->curr_cmd->wq_buf;
+		spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
+		adapter->curr_cmd->wq_buf = NULL;
+		spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
+		wait_queue->status = MWIFIEX_ERROR_CMD_CANCEL;
+		mwifiex_ioctl_complete(adapter, wait_queue, -1);
+	}
+	/* Cancel all pending command */
+	spin_lock_irqsave(&adapter->cmd_pending_q_lock, flags);
+	list_for_each_entry_safe(cmd_node, tmp_node,
+				 &adapter->cmd_pending_q, list) {
+		list_del(&cmd_node->list);
+		spin_unlock_irqrestore(&adapter->cmd_pending_q_lock, flags);
+
+		if (cmd_node->wq_buf) {
+			wait_queue =
+				(struct mwifiex_wait_queue *) cmd_node->wq_buf;
+			wait_queue->status = MWIFIEX_ERROR_CMD_CANCEL;
+			mwifiex_ioctl_complete(adapter, wait_queue, -1);
+			cmd_node->wq_buf = NULL;
+		}
+		mwifiex_insert_cmd_to_free_q(adapter, cmd_node);
+		spin_lock_irqsave(&adapter->cmd_pending_q_lock, flags);
+	}
+	spin_unlock_irqrestore(&adapter->cmd_pending_q_lock, flags);
+
+	/* Cancel all pending scan command */
+	spin_lock_irqsave(&adapter->scan_pending_q_lock, flags);
+	list_for_each_entry_safe(cmd_node, tmp_node,
+				 &adapter->scan_pending_q, list) {
+		list_del(&cmd_node->list);
+		spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags);
+
+		cmd_node->wq_buf = NULL;
+		mwifiex_insert_cmd_to_free_q(adapter, cmd_node);
+		spin_lock_irqsave(&adapter->scan_pending_q_lock, flags);
+	}
+	spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags);
+
+	spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
+	adapter->scan_processing = false;
+	spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
+}
+
+/*
+ * This function cancels all pending commands that matches with
+ * the given IOCTL request.
+ *
+ * Both the current command buffer and the pending command queue are
+ * searched for matching IOCTL request. The completion callback of
+ * the matched command is called with failure status to ensure cleanup.
+ * In case of scan commands, all pending commands in scan pending queue
+ * are cancelled.
+ */
+void
+mwifiex_cancel_pending_ioctl(struct mwifiex_adapter *adapter,
+			     struct mwifiex_wait_queue *wait_queue)
+{
+	struct cmd_ctrl_node *cmd_node = NULL, *tmp_node = NULL;
+	unsigned long cmd_flags;
+	unsigned long cmd_pending_q_flags;
+	unsigned long scan_pending_q_flags;
+	uint16_t cancel_scan_cmd = false;
+
+	if ((adapter->curr_cmd) &&
+	    (adapter->curr_cmd->wq_buf == wait_queue)) {
+		spin_lock_irqsave(&adapter->mwifiex_cmd_lock, cmd_flags);
+		cmd_node = adapter->curr_cmd;
+		cmd_node->wq_buf = NULL;
+		cmd_node->cmd_flag |= CMD_F_CANCELED;
+		spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, cmd_flags);
+	}
+
+	spin_lock_irqsave(&adapter->mwifiex_cmd_lock, cmd_flags);
+	while (1) {
+		cmd_node = mwifiex_get_pending_ioctl_cmd(adapter, wait_queue);
+		if (!cmd_node)
+			break;
+
+		spin_lock_irqsave(&adapter->cmd_pending_q_lock,
+				  cmd_pending_q_flags);
+		list_del(&cmd_node->list);
+		spin_unlock_irqrestore(&adapter->cmd_pending_q_lock,
+				       cmd_pending_q_flags);
+
+		cmd_node->wq_buf = NULL;
+		mwifiex_insert_cmd_to_free_q(adapter, cmd_node);
+	}
+	spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, cmd_flags);
+	/* Cancel all pending scan command */
+	spin_lock_irqsave(&adapter->scan_pending_q_lock,
+			  scan_pending_q_flags);
+	list_for_each_entry_safe(cmd_node, tmp_node,
+				 &adapter->scan_pending_q, list) {
+		if (cmd_node->wq_buf == wait_queue) {
+			list_del(&cmd_node->list);
+			spin_unlock_irqrestore(&adapter->scan_pending_q_lock,
+					       scan_pending_q_flags);
+			cmd_node->wq_buf = NULL;
+			mwifiex_insert_cmd_to_free_q(adapter, cmd_node);
+			spin_lock_irqsave(&adapter->scan_pending_q_lock,
+					  scan_pending_q_flags);
+			cancel_scan_cmd = true;
+		}
+	}
+	spin_unlock_irqrestore(&adapter->scan_pending_q_lock,
+			       scan_pending_q_flags);
+
+	if (cancel_scan_cmd) {
+		spin_lock_irqsave(&adapter->mwifiex_cmd_lock, cmd_flags);
+		adapter->scan_processing = false;
+		spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, cmd_flags);
+	}
+	wait_queue->status = MWIFIEX_ERROR_CMD_CANCEL;
+	mwifiex_ioctl_complete(adapter, wait_queue, -1);
+
+	return;
+}
+
+/*
+ * This function sends the sleep confirm command to firmware, if
+ * possible.
+ *
+ * The sleep confirm command cannot be issued if command response,
+ * data response or event response is awaiting handling, or if we
+ * are in the middle of sending a command, or expecting a command
+ * response.
+ */
+void
+mwifiex_check_ps_cond(struct mwifiex_adapter *adapter)
+{
+	if (!adapter->cmd_sent &&
+	    !adapter->curr_cmd && !IS_CARD_RX_RCVD(adapter))
+		mwifiex_dnld_sleep_confirm_cmd(adapter);
+	else
+		dev_dbg(adapter->dev,
+			"cmd: Delay Sleep Confirm (%s%s%s)\n",
+		       (adapter->cmd_sent) ? "D" : "",
+		       (adapter->curr_cmd) ? "C" : "",
+		       (IS_CARD_RX_RCVD(adapter)) ? "R" : "");
+}
+
+/*
+ * This function sends a Host Sleep activated event to applications.
+ *
+ * This event is generated by the driver, with a blank event body.
+ */
+void
+mwifiex_hs_activated_event(struct mwifiex_private *priv, u8 activated)
+{
+	if (activated) {
+		if (priv->adapter->is_hs_configured) {
+			priv->adapter->hs_activated = true;
+			dev_dbg(priv->adapter->dev, "event: hs_activated\n");
+			priv->adapter->hs_activate_wait_q_woken = true;
+			wake_up_interruptible(
+				&priv->adapter->hs_activate_wait_q);
+		} else {
+			dev_dbg(priv->adapter->dev, "event: HS not configured\n");
+		}
+	} else {
+		dev_dbg(priv->adapter->dev, "event: hs_deactivated\n");
+		priv->adapter->hs_activated = false;
+	}
+}
+
+/*
+ * This function handles the command response of a Host Sleep configuration
+ * command.
+ *
+ * Handling includes changing the header fields into CPU format
+ * and setting the current host sleep activation status in driver.
+ *
+ * In case host sleep status change, the function generates an event to
+ * notify the applications.
+ */
+int mwifiex_ret_802_11_hs_cfg(struct mwifiex_private *priv,
+			      struct host_cmd_ds_command *resp)
+{
+	struct mwifiex_adapter *adapter = priv->adapter;
+	struct host_cmd_ds_802_11_hs_cfg_enh *phs_cfg =
+		&resp->params.opt_hs_cfg;
+	uint32_t conditions = le32_to_cpu(phs_cfg->params.hs_config.conditions);
+
+	if (phs_cfg->action == cpu_to_le16(HS_ACTIVATE)) {
+		mwifiex_hs_activated_event(priv, true);
+		return 0;
+	} else {
+		dev_dbg(adapter->dev, "cmd: CMD_RESP: HS_CFG cmd reply"
+			" result=%#x, conditions=0x%x gpio=0x%x gap=0x%x\n",
+			resp->result, conditions,
+		       phs_cfg->params.hs_config.gpio,
+		       phs_cfg->params.hs_config.gap);
+	}
+	if (conditions != HOST_SLEEP_CFG_CANCEL) {
+		adapter->is_hs_configured = true;
+	} else {
+		adapter->is_hs_configured = false;
+		if (adapter->hs_activated)
+			mwifiex_hs_activated_event(priv, false);
+	}
+
+	return 0;
+}
+
+/*
+ * This function wakes up the adapter and generates a Host Sleep
+ * cancel event on receiving the power up interrupt.
+ */
+void
+mwifiex_process_hs_config(struct mwifiex_adapter *adapter)
+{
+	dev_dbg(adapter->dev, "info: %s: auto cancelling host sleep"
+		" since there is interrupt from the firmware\n", __func__);
+
+	adapter->if_ops.wakeup(adapter);
+	adapter->hs_activated = false;
+	adapter->is_hs_configured = false;
+	mwifiex_hs_activated_event(mwifiex_get_priv(adapter,
+				   MWIFIEX_BSS_ROLE_ANY), false);
+	return;
+}
+
+/*
+ * This function handles the command response of a sleep confirm command.
+ *
+ * The function sets the card state to SLEEP if the response indicates success.
+ */
+void
+mwifiex_process_sleep_confirm_resp(struct mwifiex_adapter *adapter,
+				   u8 *pbuf, u32 upld_len)
+{
+	struct host_cmd_ds_command *cmd = (struct host_cmd_ds_command *) pbuf;
+	struct mwifiex_private *priv =
+		mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY);
+	uint16_t result = le16_to_cpu(cmd->result);
+	uint16_t command = le16_to_cpu(cmd->command);
+	uint16_t seq_num = le16_to_cpu(cmd->seq_num);
+
+	if (!upld_len) {
+		dev_err(adapter->dev, "%s: cmd size is 0\n", __func__);
+		return;
+	}
+
+	/* Get BSS number and corresponding priv */
+	priv = mwifiex_get_priv_by_id(adapter, HostCmd_GET_BSS_NO(seq_num),
+				      HostCmd_GET_BSS_TYPE(seq_num));
+	if (!priv)
+		priv = mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY);
+
+	/* Update sequence number */
+	seq_num = HostCmd_GET_SEQ_NO(seq_num);
+	/* Clear RET_BIT from HostCmd */
+	command &= HostCmd_CMD_ID_MASK;
+
+	if (command != HostCmd_CMD_802_11_PS_MODE_ENH) {
+		dev_err(adapter->dev, "%s: received unexpected response for"
+			" cmd %x, result = %x\n", __func__, command, result);
+		return;
+	}
+
+	if (result) {
+		dev_err(adapter->dev, "%s: sleep confirm cmd failed\n",
+						__func__);
+		adapter->pm_wakeup_card_req = false;
+		adapter->ps_state = PS_STATE_AWAKE;
+		return;
+	}
+	adapter->pm_wakeup_card_req = true;
+	if (adapter->is_hs_configured)
+		mwifiex_hs_activated_event(mwifiex_get_priv(adapter,
+					   MWIFIEX_BSS_ROLE_ANY), true);
+	adapter->ps_state = PS_STATE_SLEEP;
+	cmd->command = cpu_to_le16(command);
+	cmd->seq_num = cpu_to_le16(seq_num);
+}
+EXPORT_SYMBOL_GPL(mwifiex_process_sleep_confirm_resp);
+
+/*
+ * This function prepares an enhanced power mode command.
+ *
+ * This function can be used to disable power save or to configure
+ * power save with auto PS or STA PS or auto deep sleep.
+ *
+ * Preparation includes -
+ *      - Setting command ID, action and proper size
+ *      - Setting Power Save bitmap, PS parameters TLV, PS mode TLV,
+ *        auto deep sleep TLV (as required)
+ *      - Ensuring correct endian-ness
+ */
+int mwifiex_cmd_enh_power_mode(struct mwifiex_private *priv,
+			       struct host_cmd_ds_command *cmd,
+			       u16 cmd_action, uint16_t ps_bitmap,
+			       void *data_buf)
+{
+	struct host_cmd_ds_802_11_ps_mode_enh *psmode_enh =
+		&cmd->params.psmode_enh;
+	u8 *tlv = NULL;
+	u16 cmd_size = 0;
+
+	cmd->command = cpu_to_le16(HostCmd_CMD_802_11_PS_MODE_ENH);
+	if (cmd_action == DIS_AUTO_PS) {
+		psmode_enh->action = cpu_to_le16(DIS_AUTO_PS);
+		psmode_enh->params.ps_bitmap = cpu_to_le16(ps_bitmap);
+		cmd->size = cpu_to_le16(S_DS_GEN + AUTO_PS_FIX_SIZE);
+	} else if (cmd_action == GET_PS) {
+		psmode_enh->action = cpu_to_le16(GET_PS);
+		psmode_enh->params.ps_bitmap = cpu_to_le16(ps_bitmap);
+		cmd->size = cpu_to_le16(S_DS_GEN + AUTO_PS_FIX_SIZE);
+	} else if (cmd_action == EN_AUTO_PS) {
+		psmode_enh->action = cpu_to_le16(EN_AUTO_PS);
+		psmode_enh->params.auto_ps.ps_bitmap = cpu_to_le16(ps_bitmap);
+		cmd_size = S_DS_GEN + AUTO_PS_FIX_SIZE;
+		tlv = (u8 *) cmd + cmd_size;
+		if (ps_bitmap & BITMAP_STA_PS) {
+			struct mwifiex_adapter *adapter = priv->adapter;
+			struct mwifiex_ie_types_ps_param *ps_tlv =
+				(struct mwifiex_ie_types_ps_param *) tlv;
+			struct mwifiex_ps_param *ps_mode = &ps_tlv->param;
+			ps_tlv->header.type = cpu_to_le16(TLV_TYPE_PS_PARAM);
+			ps_tlv->header.len = cpu_to_le16(sizeof(*ps_tlv) -
+					sizeof(struct mwifiex_ie_types_header));
+			cmd_size += sizeof(*ps_tlv);
+			tlv += sizeof(*ps_tlv);
+			dev_dbg(adapter->dev, "cmd: PS Command: Enter PS\n");
+			ps_mode->null_pkt_interval =
+				cpu_to_le16(adapter->null_pkt_interval);
+			ps_mode->multiple_dtims =
+				cpu_to_le16(adapter->multiple_dtim);
+			ps_mode->bcn_miss_timeout =
+				cpu_to_le16(adapter->bcn_miss_time_out);
+			ps_mode->local_listen_interval =
+				cpu_to_le16(adapter->local_listen_interval);
+			ps_mode->adhoc_wake_period =
+				cpu_to_le16(adapter->adhoc_awake_period);
+			ps_mode->delay_to_ps =
+				cpu_to_le16(adapter->delay_to_ps);
+			ps_mode->mode =
+				cpu_to_le16(adapter->enhanced_ps_mode);
+
+		}
+		if (ps_bitmap & BITMAP_AUTO_DS) {
+			struct mwifiex_ie_types_auto_ds_param *auto_ps_tlv =
+				(struct mwifiex_ie_types_auto_ds_param *) tlv;
+			struct mwifiex_auto_ds_param *auto_ds =
+				&auto_ps_tlv->param;
+			u16 idletime = 0;
+			auto_ps_tlv->header.type =
+				cpu_to_le16(TLV_TYPE_AUTO_DS_PARAM);
+			auto_ps_tlv->header.len =
+				cpu_to_le16(sizeof(*auto_ps_tlv) -
+					sizeof(struct mwifiex_ie_types_header));
+			cmd_size += sizeof(*auto_ps_tlv);
+			tlv += sizeof(*auto_ps_tlv);
+			if (data_buf)
+				idletime = ((struct mwifiex_ds_auto_ds *)
+					     data_buf)->idle_time;
+			dev_dbg(priv->adapter->dev,
+					"cmd: PS Command: Enter Auto Deep Sleep\n");
+			auto_ds->deep_sleep_timeout = cpu_to_le16(idletime);
+		}
+		cmd->size = cpu_to_le16(cmd_size);
+	}
+	return 0;
+}
+
+/*
+ * This function handles the command response of an enhanced power mode
+ * command.
+ *
+ * Handling includes changing the header fields into CPU format
+ * and setting the current enhanced power mode in driver.
+ */
+int mwifiex_ret_enh_power_mode(struct mwifiex_private *priv,
+			       struct host_cmd_ds_command *resp,
+			       void *data_buf)
+{
+	struct mwifiex_adapter *adapter = priv->adapter;
+	struct host_cmd_ds_802_11_ps_mode_enh *ps_mode =
+		&resp->params.psmode_enh;
+	uint16_t action = le16_to_cpu(ps_mode->action);
+	uint16_t ps_bitmap = le16_to_cpu(ps_mode->params.ps_bitmap);
+	uint16_t auto_ps_bitmap =
+		le16_to_cpu(ps_mode->params.auto_ps.ps_bitmap);
+
+	dev_dbg(adapter->dev, "info: %s: PS_MODE cmd reply result=%#x action=%#X\n",
+					__func__, resp->result, action);
+	if (action == EN_AUTO_PS) {
+		if (auto_ps_bitmap & BITMAP_AUTO_DS) {
+			dev_dbg(adapter->dev, "cmd: Enabled auto deep sleep\n");
+			priv->adapter->is_deep_sleep = true;
+		}
+		if (auto_ps_bitmap & BITMAP_STA_PS) {
+			dev_dbg(adapter->dev, "cmd: Enabled STA power save\n");
+			if (adapter->sleep_period.period)
+				dev_dbg(adapter->dev, "cmd: set to uapsd/pps mode\n");
+		}
+	} else if (action == DIS_AUTO_PS) {
+		if (ps_bitmap & BITMAP_AUTO_DS) {
+			priv->adapter->is_deep_sleep = false;
+			dev_dbg(adapter->dev, "cmd: Disabled auto deep sleep\n");
+		}
+		if (ps_bitmap & BITMAP_STA_PS) {
+			dev_dbg(adapter->dev, "cmd: Disabled STA power save\n");
+			if (adapter->sleep_period.period) {
+				adapter->delay_null_pkt = false;
+				adapter->tx_lock_flag = false;
+				adapter->pps_uapsd_mode = false;
+			}
+		}
+	} else if (action == GET_PS) {
+		if (ps_bitmap & (BITMAP_STA_PS | BITMAP_UAP_INACT_PS
+							| BITMAP_UAP_DTIM_PS))
+			adapter->ps_mode = MWIFIEX_802_11_POWER_MODE_PSP;
+		else
+			adapter->ps_mode = MWIFIEX_802_11_POWER_MODE_CAM;
+
+		dev_dbg(adapter->dev, "cmd: ps_bitmap=%#x\n", ps_bitmap);
+
+		if (data_buf) {
+			/* This section is for get power save mode */
+			struct mwifiex_ds_pm_cfg *pm_cfg =
+					(struct mwifiex_ds_pm_cfg *)data_buf;
+			if (ps_bitmap & BITMAP_STA_PS)
+				pm_cfg->param.ps_mode = 1;
+			else
+				pm_cfg->param.ps_mode = 0;
+		}
+	}
+	return 0;
+}
+
+/*
+ * This function prepares command to get hardware specifications.
+ *
+ * Preparation includes -
+ *      - Setting command ID, action and proper size
+ *      - Setting permanent address parameter
+ *      - Ensuring correct endian-ness
+ */
+int mwifiex_cmd_get_hw_spec(struct mwifiex_private *priv,
+			    struct host_cmd_ds_command *cmd)
+{
+	struct host_cmd_ds_get_hw_spec *hw_spec = &cmd->params.hw_spec;
+
+	cmd->command = cpu_to_le16(HostCmd_CMD_GET_HW_SPEC);
+	cmd->size =
+		cpu_to_le16(sizeof(struct host_cmd_ds_get_hw_spec) + S_DS_GEN);
+	memcpy(hw_spec->permanent_addr, priv->curr_addr, ETH_ALEN);
+
+	return 0;
+}
+
+/*
+ * This function handles the command response of get hardware
+ * specifications.
+ *
+ * Handling includes changing the header fields into CPU format
+ * and saving/updating the following parameters in driver -
+ *      - Firmware capability information
+ *      - Firmware band settings
+ *      - Ad-hoc start band and channel
+ *      - Ad-hoc 11n activation status
+ *      - Firmware release number
+ *      - Number of antennas
+ *      - Hardware address
+ *      - Hardware interface version
+ *      - Firmware version
+ *      - Region code
+ *      - 11n capabilities
+ *      - MCS support fields
+ *      - MP end port
+ */
+int mwifiex_ret_get_hw_spec(struct mwifiex_private *priv,
+			    struct host_cmd_ds_command *resp)
+{
+	struct host_cmd_ds_get_hw_spec *hw_spec = &resp->params.hw_spec;
+	struct mwifiex_adapter *adapter = priv->adapter;
+	int i;
+
+	adapter->fw_cap_info = le32_to_cpu(hw_spec->fw_cap_info);
+
+	if (IS_SUPPORT_MULTI_BANDS(adapter))
+		adapter->fw_bands = (u8) GET_FW_DEFAULT_BANDS(adapter);
+	else
+		adapter->fw_bands = BAND_B;
+
+	adapter->config_bands = adapter->fw_bands;
+
+	if (adapter->fw_bands & BAND_A) {
+		if (adapter->fw_bands & BAND_GN) {
+			adapter->config_bands |= BAND_AN;
+			adapter->fw_bands |= BAND_AN;
+		}
+		if (adapter->fw_bands & BAND_AN) {
+			adapter->adhoc_start_band = BAND_A | BAND_AN;
+			adapter->adhoc_11n_enabled = true;
+		} else {
+			adapter->adhoc_start_band = BAND_A;
+		}
+		priv->adhoc_channel = DEFAULT_AD_HOC_CHANNEL_A;
+	} else if (adapter->fw_bands & BAND_GN) {
+		adapter->adhoc_start_band = BAND_G | BAND_B | BAND_GN;
+		priv->adhoc_channel = DEFAULT_AD_HOC_CHANNEL;
+		adapter->adhoc_11n_enabled = true;
+	} else if (adapter->fw_bands & BAND_G) {
+		adapter->adhoc_start_band = BAND_G | BAND_B;
+		priv->adhoc_channel = DEFAULT_AD_HOC_CHANNEL;
+	} else if (adapter->fw_bands & BAND_B) {
+		adapter->adhoc_start_band = BAND_B;
+		priv->adhoc_channel = DEFAULT_AD_HOC_CHANNEL;
+	}
+
+	adapter->fw_release_number = le32_to_cpu(hw_spec->fw_release_number);
+	adapter->number_of_antenna = le16_to_cpu(hw_spec->number_of_antenna);
+
+	dev_dbg(adapter->dev, "info: GET_HW_SPEC: fw_release_number- %#x\n",
+	       adapter->fw_release_number);
+	dev_dbg(adapter->dev, "info: GET_HW_SPEC: permanent addr: %pM\n",
+					hw_spec->permanent_addr);
+	dev_dbg(adapter->dev, "info: GET_HW_SPEC: hw_if_version=%#x  version=%#x\n",
+		le16_to_cpu(hw_spec->hw_if_version),
+	       le16_to_cpu(hw_spec->version));
+
+	if (priv->curr_addr[0] == 0xff)
+		memmove(priv->curr_addr, hw_spec->permanent_addr, ETH_ALEN);
+
+	adapter->region_code = le16_to_cpu(hw_spec->region_code);
+
+	for (i = 0; i < MWIFIEX_MAX_REGION_CODE; i++)
+		/* Use the region code to search for the index */
+		if (adapter->region_code == region_code_index[i])
+			break;
+
+	/* If it's unidentified region code, use the default (USA) */
+	if (i >= MWIFIEX_MAX_REGION_CODE) {
+		adapter->region_code = 0x10;
+		dev_dbg(adapter->dev, "cmd: unknown region code, use default (USA)\n");
+	}
+
+	adapter->hw_dot_11n_dev_cap = le32_to_cpu(hw_spec->dot_11n_dev_cap);
+	adapter->usr_dot_11n_dev_cap = adapter->hw_dot_11n_dev_cap &
+		DEFAULT_11N_CAP_MASK;
+	adapter->hw_dev_mcs_support = hw_spec->dev_mcs_support;
+	adapter->usr_dev_mcs_support = adapter->hw_dev_mcs_support;
+	mwifiex_show_dot_11n_dev_cap(adapter, adapter->hw_dot_11n_dev_cap);
+	mwifiex_show_dev_mcs_support(adapter, adapter->hw_dev_mcs_support);
+
+	if (adapter->if_ops.update_mp_end_port)
+		adapter->if_ops.update_mp_end_port(adapter,
+					le16_to_cpu(hw_spec->mp_end_port));
+
+	return 0;
+}