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, 1464 insertions, 0 deletions

diff --git a/drivers/net/wireless/mwifiex/join.c b/drivers/net/wireless/mwifiex/join.c
new file mode 100644
index 00000000000..d06f4c2d1d3
--- /dev/null
+++ b/drivers/net/wireless/mwifiex/join.c
@@ -0,0 +1,1464 @@
+/*
+ * Marvell Wireless LAN device driver: association and ad-hoc start/join
+ *
+ * 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"
+
+#define CAPINFO_MASK    (~(BIT(15) | BIT(14) | BIT(12) | BIT(11) | BIT(9)))
+
+/*
+ * Append a generic IE as a pass through TLV to a TLV buffer.
+ *
+ * This function is called from the network join command preparation routine.
+ *
+ * If the IE buffer has been setup by the application, this routine appends
+ * the buffer as a pass through TLV type to the request.
+ */
+static int
+mwifiex_cmd_append_generic_ie(struct mwifiex_private *priv, u8 **buffer)
+{
+	int ret_len = 0;
+	struct mwifiex_ie_types_header ie_header;
+
+	/* Null Checks */
+	if (!buffer)
+		return 0;
+	if (!(*buffer))
+		return 0;
+
+	/*
+	 * If there is a generic ie buffer setup, append it to the return
+	 *   parameter buffer pointer.
+	 */
+	if (priv->gen_ie_buf_len) {
+		dev_dbg(priv->adapter->dev, "info: %s: append generic %d to %p\n",
+				__func__, priv->gen_ie_buf_len, *buffer);
+
+		/* Wrap the generic IE buffer with a pass through TLV type */
+		ie_header.type = cpu_to_le16(TLV_TYPE_PASSTHROUGH);
+		ie_header.len = cpu_to_le16(priv->gen_ie_buf_len);
+		memcpy(*buffer, &ie_header, sizeof(ie_header));
+
+		/* Increment the return size and the return buffer pointer
+		   param */
+		*buffer += sizeof(ie_header);
+		ret_len += sizeof(ie_header);
+
+		/* Copy the generic IE buffer to the output buffer, advance
+		   pointer */
+		memcpy(*buffer, priv->gen_ie_buf, priv->gen_ie_buf_len);
+
+		/* Increment the return size and the return buffer pointer
+		   param */
+		*buffer += priv->gen_ie_buf_len;
+		ret_len += priv->gen_ie_buf_len;
+
+		/* Reset the generic IE buffer */
+		priv->gen_ie_buf_len = 0;
+	}
+
+	/* return the length appended to the buffer */
+	return ret_len;
+}
+
+/*
+ * Append TSF tracking info from the scan table for the target AP.
+ *
+ * This function is called from the network join command preparation routine.
+ *
+ * The TSF table TSF sent to the firmware contains two TSF values:
+ *      - The TSF of the target AP from its previous beacon/probe response
+ *      - The TSF timestamp of our local MAC at the time we observed the
+ *        beacon/probe response.
+ *
+ * The firmware uses the timestamp values to set an initial TSF value
+ * in the MAC for the new association after a reassociation attempt.
+ */
+static int
+mwifiex_cmd_append_tsf_tlv(struct mwifiex_private *priv, u8 **buffer,
+			   struct mwifiex_bssdescriptor *bss_desc)
+{
+	struct mwifiex_ie_types_tsf_timestamp tsf_tlv;
+	long long tsf_val;
+
+	/* Null Checks */
+	if (buffer == NULL)
+		return 0;
+	if (*buffer == NULL)
+		return 0;
+
+	memset(&tsf_tlv, 0x00, sizeof(struct mwifiex_ie_types_tsf_timestamp));
+
+	tsf_tlv.header.type = cpu_to_le16(TLV_TYPE_TSFTIMESTAMP);
+	tsf_tlv.header.len = cpu_to_le16(2 * sizeof(tsf_val));
+
+	memcpy(*buffer, &tsf_tlv, sizeof(tsf_tlv.header));
+	*buffer += sizeof(tsf_tlv.header);
+
+	memcpy(*buffer, &tsf_val, sizeof(tsf_val));
+	*buffer += sizeof(tsf_val);
+
+	memcpy(&tsf_val, bss_desc->time_stamp, sizeof(tsf_val));
+
+	dev_dbg(priv->adapter->dev, "info: %s: TSF offset calc: %016llx - "
+			"%016llx\n", __func__, tsf_val, bss_desc->network_tsf);
+
+	memcpy(*buffer, &tsf_val, sizeof(tsf_val));
+	*buffer += sizeof(tsf_val);
+
+	return sizeof(tsf_tlv.header) + (2 * sizeof(tsf_val));
+}
+
+/*
+ * This function finds out the common rates between rate1 and rate2.
+ *
+ * It will fill common rates in rate1 as output if found.
+ *
+ * NOTE: Setting the MSB of the basic rates needs to be taken
+ * care of, either before or after calling this function.
+ */
+static int mwifiex_get_common_rates(struct mwifiex_private *priv, u8 *rate1,
+				    u32 rate1_size, u8 *rate2, u32 rate2_size)
+{
+	int ret = 0;
+	u8 *ptr = rate1;
+	u8 *tmp = NULL;
+	u32 i, j;
+
+	tmp = kmalloc(rate1_size, GFP_KERNEL);
+	if (!tmp) {
+		dev_err(priv->adapter->dev, "failed to alloc tmp buf\n");
+		return -ENOMEM;
+	}
+
+	memcpy(tmp, rate1, rate1_size);
+	memset(rate1, 0, rate1_size);
+
+	for (i = 0; rate2[i] && i < rate2_size; i++) {
+		for (j = 0; tmp[j] && j < rate1_size; j++) {
+			/* Check common rate, excluding the bit for
+			   basic rate */
+			if ((rate2[i] & 0x7F) == (tmp[j] & 0x7F)) {
+				*rate1++ = tmp[j];
+				break;
+			}
+		}
+	}
+
+	dev_dbg(priv->adapter->dev, "info: Tx data rate set to %#x\n",
+						priv->data_rate);
+
+	if (!priv->is_data_rate_auto) {
+		while (*ptr) {
+			if ((*ptr & 0x7f) == priv->data_rate) {
+				ret = 0;
+				goto done;
+			}
+			ptr++;
+		}
+		dev_err(priv->adapter->dev, "previously set fixed data rate %#x"
+			" is not compatible with the network\n",
+			priv->data_rate);
+
+		ret = -1;
+		goto done;
+	}
+
+	ret = 0;
+done:
+	kfree(tmp);
+	return ret;
+}
+
+/*
+ * This function creates the intersection of the rates supported by a
+ * target BSS and our adapter settings for use in an assoc/join command.
+ */
+static int
+mwifiex_setup_rates_from_bssdesc(struct mwifiex_private *priv,
+				 struct mwifiex_bssdescriptor *bss_desc,
+				 u8 *out_rates, u32 *out_rates_size)
+{
+	u8 card_rates[MWIFIEX_SUPPORTED_RATES];
+	u32 card_rates_size = 0;
+
+	/* Copy AP supported rates */
+	memcpy(out_rates, bss_desc->supported_rates, MWIFIEX_SUPPORTED_RATES);
+	/* Get the STA supported rates */
+	card_rates_size = mwifiex_get_active_data_rates(priv, card_rates);
+	/* Get the common rates between AP and STA supported rates */
+	if (mwifiex_get_common_rates(priv, out_rates, MWIFIEX_SUPPORTED_RATES,
+				     card_rates, card_rates_size)) {
+		*out_rates_size = 0;
+		dev_err(priv->adapter->dev, "%s: cannot get common rates\n",
+						__func__);
+		return -1;
+	}
+
+	*out_rates_size =
+		min_t(size_t, strlen(out_rates), MWIFIEX_SUPPORTED_RATES);
+
+	return 0;
+}
+
+/*
+ * This function updates the scan entry TSF timestamps to reflect
+ * a new association.
+ */
+static void
+mwifiex_update_tsf_timestamps(struct mwifiex_private *priv,
+			      struct mwifiex_bssdescriptor *new_bss_desc)
+{
+	struct mwifiex_adapter *adapter = priv->adapter;
+	u32 table_idx;
+	long long new_tsf_base;
+	signed long long tsf_delta;
+
+	memcpy(&new_tsf_base, new_bss_desc->time_stamp, sizeof(new_tsf_base));
+
+	tsf_delta = new_tsf_base - new_bss_desc->network_tsf;
+
+	dev_dbg(adapter->dev, "info: TSF: update TSF timestamps, "
+		"0x%016llx -> 0x%016llx\n",
+	       new_bss_desc->network_tsf, new_tsf_base);
+
+	for (table_idx = 0; table_idx < adapter->num_in_scan_table;
+	     table_idx++)
+		adapter->scan_table[table_idx].network_tsf += tsf_delta;
+}
+
+/*
+ * This function appends a WAPI IE.
+ *
+ * This function is called from the network join command preparation routine.
+ *
+ * If the IE buffer has been setup by the application, this routine appends
+ * the buffer as a WAPI TLV type to the request.
+ */
+static int
+mwifiex_cmd_append_wapi_ie(struct mwifiex_private *priv, u8 **buffer)
+{
+	int retLen = 0;
+	struct mwifiex_ie_types_header ie_header;
+
+	/* Null Checks */
+	if (buffer == NULL)
+		return 0;
+	if (*buffer == NULL)
+		return 0;
+
+	/*
+	 * If there is a wapi ie buffer setup, append it to the return
+	 *   parameter buffer pointer.
+	 */
+	if (priv->wapi_ie_len) {
+		dev_dbg(priv->adapter->dev, "cmd: append wapi ie %d to %p\n",
+				priv->wapi_ie_len, *buffer);
+
+		/* Wrap the generic IE buffer with a pass through TLV type */
+		ie_header.type = cpu_to_le16(TLV_TYPE_WAPI_IE);
+		ie_header.len = cpu_to_le16(priv->wapi_ie_len);
+		memcpy(*buffer, &ie_header, sizeof(ie_header));
+
+		/* Increment the return size and the return buffer pointer
+		   param */
+		*buffer += sizeof(ie_header);
+		retLen += sizeof(ie_header);
+
+		/* Copy the wapi IE buffer to the output buffer, advance
+		   pointer */
+		memcpy(*buffer, priv->wapi_ie, priv->wapi_ie_len);
+
+		/* Increment the return size and the return buffer pointer
+		   param */
+		*buffer += priv->wapi_ie_len;
+		retLen += priv->wapi_ie_len;
+
+	}
+	/* return the length appended to the buffer */
+	return retLen;
+}
+
+/*
+ * This function appends rsn ie tlv for wpa/wpa2 security modes.
+ * It is called from the network join command preparation routine.
+ */
+static int mwifiex_append_rsn_ie_wpa_wpa2(struct mwifiex_private *priv,
+					  u8 **buffer)
+{
+	struct mwifiex_ie_types_rsn_param_set *rsn_ie_tlv;
+	int rsn_ie_len;
+
+	if (!buffer || !(*buffer))
+		return 0;
+
+	rsn_ie_tlv = (struct mwifiex_ie_types_rsn_param_set *) (*buffer);
+	rsn_ie_tlv->header.type = cpu_to_le16((u16) priv->wpa_ie[0]);
+	rsn_ie_tlv->header.type = cpu_to_le16(
+				 le16_to_cpu(rsn_ie_tlv->header.type) & 0x00FF);
+	rsn_ie_tlv->header.len = cpu_to_le16((u16) priv->wpa_ie[1]);
+	rsn_ie_tlv->header.len = cpu_to_le16(le16_to_cpu(rsn_ie_tlv->header.len)
+							& 0x00FF);
+	if (le16_to_cpu(rsn_ie_tlv->header.len) <= (sizeof(priv->wpa_ie) - 2))
+		memcpy(rsn_ie_tlv->rsn_ie, &priv->wpa_ie[2],
+					le16_to_cpu(rsn_ie_tlv->header.len));
+	else
+		return -1;
+
+	rsn_ie_len = sizeof(rsn_ie_tlv->header) +
+					le16_to_cpu(rsn_ie_tlv->header.len);
+	*buffer += rsn_ie_len;
+
+	return rsn_ie_len;
+}
+
+/*
+ * This function prepares command for association.
+ *
+ * This sets the following parameters -
+ *      - Peer MAC address
+ *      - Listen interval
+ *      - Beacon interval
+ *      - Capability information
+ *
+ * ...and the following TLVs, as required -
+ *      - SSID TLV
+ *      - PHY TLV
+ *      - SS TLV
+ *      - Rates TLV
+ *      - Authentication TLV
+ *      - Channel TLV
+ *      - WPA/WPA2 IE
+ *      - 11n TLV
+ *      - Vendor specific TLV
+ *      - WMM TLV
+ *      - WAPI IE
+ *      - Generic IE
+ *      - TSF TLV
+ *
+ * Preparation also includes -
+ *      - Setting command ID and proper size
+ *      - Ensuring correct endian-ness
+ */
+int mwifiex_cmd_802_11_associate(struct mwifiex_private *priv,
+				 struct host_cmd_ds_command *cmd,
+				 void *data_buf)
+{
+	struct host_cmd_ds_802_11_associate *assoc = &cmd->params.associate;
+	struct mwifiex_bssdescriptor *bss_desc;
+	struct mwifiex_ie_types_ssid_param_set *ssid_tlv;
+	struct mwifiex_ie_types_phy_param_set *phy_tlv;
+	struct mwifiex_ie_types_ss_param_set *ss_tlv;
+	struct mwifiex_ie_types_rates_param_set *rates_tlv;
+	struct mwifiex_ie_types_auth_type *auth_tlv;
+	struct mwifiex_ie_types_chan_list_param_set *chan_tlv;
+	u8 rates[MWIFIEX_SUPPORTED_RATES];
+	u32 rates_size;
+	u16 tmp_cap;
+	u8 *pos;
+	int rsn_ie_len = 0;
+
+	bss_desc = (struct mwifiex_bssdescriptor *) data_buf;
+	pos = (u8 *) assoc;
+
+	mwifiex_cfg_tx_buf(priv, bss_desc);
+
+	cmd->command = cpu_to_le16(HostCmd_CMD_802_11_ASSOCIATE);
+
+	/* Save so we know which BSS Desc to use in the response handler */
+	priv->attempted_bss_desc = bss_desc;
+
+	memcpy(assoc->peer_sta_addr,
+	       bss_desc->mac_address, sizeof(assoc->peer_sta_addr));
+	pos += sizeof(assoc->peer_sta_addr);
+
+	/* Set the listen interval */
+	assoc->listen_interval = cpu_to_le16(priv->listen_interval);
+	/* Set the beacon period */
+	assoc->beacon_period = cpu_to_le16(bss_desc->beacon_period);
+
+	pos += sizeof(assoc->cap_info_bitmap);
+	pos += sizeof(assoc->listen_interval);
+	pos += sizeof(assoc->beacon_period);
+	pos += sizeof(assoc->dtim_period);
+
+	ssid_tlv = (struct mwifiex_ie_types_ssid_param_set *) pos;
+	ssid_tlv->header.type = cpu_to_le16(WLAN_EID_SSID);
+	ssid_tlv->header.len = cpu_to_le16((u16) bss_desc->ssid.ssid_len);
+	memcpy(ssid_tlv->ssid, bss_desc->ssid.ssid,
+		le16_to_cpu(ssid_tlv->header.len));
+	pos += sizeof(ssid_tlv->header) + le16_to_cpu(ssid_tlv->header.len);
+
+	phy_tlv = (struct mwifiex_ie_types_phy_param_set *) pos;
+	phy_tlv->header.type = cpu_to_le16(WLAN_EID_DS_PARAMS);
+	phy_tlv->header.len = cpu_to_le16(sizeof(phy_tlv->fh_ds.ds_param_set));
+	memcpy(&phy_tlv->fh_ds.ds_param_set,
+	       &bss_desc->phy_param_set.ds_param_set.current_chan,
+	       sizeof(phy_tlv->fh_ds.ds_param_set));
+	pos += sizeof(phy_tlv->header) + le16_to_cpu(phy_tlv->header.len);
+
+	ss_tlv = (struct mwifiex_ie_types_ss_param_set *) pos;
+	ss_tlv->header.type = cpu_to_le16(WLAN_EID_CF_PARAMS);
+	ss_tlv->header.len = cpu_to_le16(sizeof(ss_tlv->cf_ibss.cf_param_set));
+	pos += sizeof(ss_tlv->header) + le16_to_cpu(ss_tlv->header.len);
+
+	/* Get the common rates supported between the driver and the BSS Desc */
+	if (mwifiex_setup_rates_from_bssdesc
+	    (priv, bss_desc, rates, &rates_size))
+		return -1;
+
+	/* Save the data rates into Current BSS state structure */
+	priv->curr_bss_params.num_of_rates = rates_size;
+	memcpy(&priv->curr_bss_params.data_rates, rates, rates_size);
+
+	/* Setup the Rates TLV in the association command */
+	rates_tlv = (struct mwifiex_ie_types_rates_param_set *) pos;
+	rates_tlv->header.type = cpu_to_le16(WLAN_EID_SUPP_RATES);
+	rates_tlv->header.len = cpu_to_le16((u16) rates_size);
+	memcpy(rates_tlv->rates, rates, rates_size);
+	pos += sizeof(rates_tlv->header) + rates_size;
+	dev_dbg(priv->adapter->dev, "info: ASSOC_CMD: rates size = %d\n",
+					rates_size);
+
+	/* Add the Authentication type to be used for Auth frames if needed */
+	if (priv->sec_info.authentication_mode != MWIFIEX_AUTH_MODE_AUTO) {
+		auth_tlv = (struct mwifiex_ie_types_auth_type *) pos;
+		auth_tlv->header.type = cpu_to_le16(TLV_TYPE_AUTH_TYPE);
+		auth_tlv->header.len = cpu_to_le16(sizeof(auth_tlv->auth_type));
+		if (priv->sec_info.wep_status == MWIFIEX_802_11_WEP_ENABLED)
+			auth_tlv->auth_type = cpu_to_le16((u16) priv->sec_info.
+							  authentication_mode);
+		else
+			auth_tlv->auth_type =
+				cpu_to_le16(MWIFIEX_AUTH_MODE_OPEN);
+		pos += sizeof(auth_tlv->header) +
+			le16_to_cpu(auth_tlv->header.len);
+	}
+
+	if (IS_SUPPORT_MULTI_BANDS(priv->adapter)
+	    && !(ISSUPP_11NENABLED(priv->adapter->fw_cap_info)
+		&& (!bss_desc->disable_11n)
+		 && (priv->adapter->config_bands & BAND_GN
+		     || priv->adapter->config_bands & BAND_AN)
+		 && (bss_desc->bcn_ht_cap)
+	    )
+		) {
+		/* Append a channel TLV for the channel the attempted AP was
+		   found on */
+		chan_tlv = (struct mwifiex_ie_types_chan_list_param_set *) pos;
+		chan_tlv->header.type = cpu_to_le16(TLV_TYPE_CHANLIST);
+		chan_tlv->header.len =
+			cpu_to_le16(sizeof(struct mwifiex_chan_scan_param_set));
+
+		memset(chan_tlv->chan_scan_param, 0x00,
+		       sizeof(struct mwifiex_chan_scan_param_set));
+		chan_tlv->chan_scan_param[0].chan_number =
+			(bss_desc->phy_param_set.ds_param_set.current_chan);
+		dev_dbg(priv->adapter->dev, "info: Assoc: TLV Chan = %d\n",
+		       chan_tlv->chan_scan_param[0].chan_number);
+
+		chan_tlv->chan_scan_param[0].radio_type =
+			mwifiex_band_to_radio_type((u8) bss_desc->bss_band);
+
+		dev_dbg(priv->adapter->dev, "info: Assoc: TLV Band = %d\n",
+		       chan_tlv->chan_scan_param[0].radio_type);
+		pos += sizeof(chan_tlv->header) +
+			sizeof(struct mwifiex_chan_scan_param_set);
+	}
+
+	if (!priv->wps.session_enable) {
+		if (priv->sec_info.wpa_enabled || priv->sec_info.wpa2_enabled)
+			rsn_ie_len = mwifiex_append_rsn_ie_wpa_wpa2(priv, &pos);
+
+		if (rsn_ie_len == -1)
+			return -1;
+	}
+
+	if (ISSUPP_11NENABLED(priv->adapter->fw_cap_info)
+		&& (!bss_desc->disable_11n)
+	    && (priv->adapter->config_bands & BAND_GN
+		|| priv->adapter->config_bands & BAND_AN))
+		mwifiex_cmd_append_11n_tlv(priv, bss_desc, &pos);
+
+	/* Append vendor specific IE TLV */
+	mwifiex_cmd_append_vsie_tlv(priv, MWIFIEX_VSIE_MASK_ASSOC, &pos);
+
+	mwifiex_wmm_process_association_req(priv, &pos, &bss_desc->wmm_ie,
+					    bss_desc->bcn_ht_cap);
+	if (priv->sec_info.wapi_enabled && priv->wapi_ie_len)
+		mwifiex_cmd_append_wapi_ie(priv, &pos);
+
+
+	mwifiex_cmd_append_generic_ie(priv, &pos);
+
+	mwifiex_cmd_append_tsf_tlv(priv, &pos, bss_desc);
+
+	cmd->size = cpu_to_le16((u16) (pos - (u8 *) assoc) + S_DS_GEN);
+
+	/* Set the Capability info at last */
+	tmp_cap = bss_desc->cap_info_bitmap;
+
+	if (priv->adapter->config_bands == BAND_B)
+		SHORT_SLOT_TIME_DISABLED(tmp_cap);
+
+	tmp_cap &= CAPINFO_MASK;
+	dev_dbg(priv->adapter->dev, "info: ASSOC_CMD: tmp_cap=%4X CAPINFO_MASK=%4lX\n",
+	       tmp_cap, CAPINFO_MASK);
+	assoc->cap_info_bitmap = cpu_to_le16(tmp_cap);
+
+	return 0;
+}
+
+/*
+ * Association firmware command response handler
+ *
+ * The response buffer for the association command has the following
+ * memory layout.
+ *
+ * For cases where an association response was not received (indicated
+ * by the CapInfo and AId field):
+ *
+ *     .------------------------------------------------------------.
+ *     |  Header(4 * sizeof(t_u16)):  Standard command response hdr |
+ *     .------------------------------------------------------------.
+ *     |  cap_info/Error Return(t_u16):                             |
+ *     |           0xFFFF(-1): Internal error                       |
+ *     |           0xFFFE(-2): Authentication unhandled message     |
+ *     |           0xFFFD(-3): Authentication refused               |
+ *     |           0xFFFC(-4): Timeout waiting for AP response      |
+ *     .------------------------------------------------------------.
+ *     |  status_code(t_u16):                                       |
+ *     |        If cap_info is -1:                                  |
+ *     |           An internal firmware failure prevented the       |
+ *     |           command from being processed.  The status_code   |
+ *     |           will be set to 1.                                |
+ *     |                                                            |
+ *     |        If cap_info is -2:                                  |
+ *     |           An authentication frame was received but was     |
+ *     |           not handled by the firmware.  IEEE Status        |
+ *     |           code for the failure is returned.                |
+ *     |                                                            |
+ *     |        If cap_info is -3:                                  |
+ *     |           An authentication frame was received and the     |
+ *     |           status_code is the IEEE Status reported in the   |
+ *     |           response.                                        |
+ *     |                                                            |
+ *     |        If cap_info is -4:                                  |
+ *     |           (1) Association response timeout                 |
+ *     |           (2) Authentication response timeout              |
+ *     .------------------------------------------------------------.
+ *     |  a_id(t_u16): 0xFFFF                                       |
+ *     .------------------------------------------------------------.
+ *
+ *
+ * For cases where an association response was received, the IEEE
+ * standard association response frame is returned:
+ *
+ *     .------------------------------------------------------------.
+ *     |  Header(4 * sizeof(t_u16)):  Standard command response hdr |
+ *     .------------------------------------------------------------.
+ *     |  cap_info(t_u16): IEEE Capability                          |
+ *     .------------------------------------------------------------.
+ *     |  status_code(t_u16): IEEE Status Code                      |
+ *     .------------------------------------------------------------.
+ *     |  a_id(t_u16): IEEE Association ID                          |
+ *     .------------------------------------------------------------.
+ *     |  IEEE IEs(variable): Any received IEs comprising the       |
+ *     |                      remaining portion of a received       |
+ *     |                      association response frame.           |
+ *     .------------------------------------------------------------.
+ *
+ * For simplistic handling, the status_code field can be used to determine
+ * an association success (0) or failure (non-zero).
+ */
+int mwifiex_ret_802_11_associate(struct mwifiex_private *priv,
+			     struct host_cmd_ds_command *resp, void *wq_buf)
+{
+	int ret = 0;
+	struct mwifiex_wait_queue *wait_queue =
+		(struct mwifiex_wait_queue *) wq_buf;
+	struct ieee_types_assoc_rsp *assoc_rsp;
+	struct mwifiex_bssdescriptor *bss_desc;
+	u8 enable_data = true;
+
+	assoc_rsp = (struct ieee_types_assoc_rsp *) &resp->params;
+
+	priv->assoc_rsp_size = min(le16_to_cpu(resp->size) - S_DS_GEN,
+				     sizeof(priv->assoc_rsp_buf));
+
+	memcpy(priv->assoc_rsp_buf, &resp->params, priv->assoc_rsp_size);
+
+	if (le16_to_cpu(assoc_rsp->status_code)) {
+		priv->adapter->dbg.num_cmd_assoc_failure++;
+		dev_err(priv->adapter->dev, "ASSOC_RESP: association failed, "
+		       "status code = %d, error = 0x%x, a_id = 0x%x\n",
+		       le16_to_cpu(assoc_rsp->status_code),
+		       le16_to_cpu(assoc_rsp->cap_info_bitmap),
+		       le16_to_cpu(assoc_rsp->a_id));
+
+		ret = -1;
+		goto done;
+	}
+
+	/* Send a Media Connected event, according to the Spec */
+	priv->media_connected = true;
+
+	priv->adapter->ps_state = PS_STATE_AWAKE;
+	priv->adapter->pps_uapsd_mode = false;
+	priv->adapter->tx_lock_flag = false;
+
+	/* Set the attempted BSSID Index to current */
+	bss_desc = priv->attempted_bss_desc;
+
+	dev_dbg(priv->adapter->dev, "info: ASSOC_RESP: %s\n",
+						bss_desc->ssid.ssid);
+
+	/* Make a copy of current BSSID descriptor */
+	memcpy(&priv->curr_bss_params.bss_descriptor,
+	       bss_desc, sizeof(struct mwifiex_bssdescriptor));
+
+	/* Update curr_bss_params */
+	priv->curr_bss_params.bss_descriptor.channel
+		= bss_desc->phy_param_set.ds_param_set.current_chan;
+
+	priv->curr_bss_params.band = (u8) bss_desc->bss_band;
+
+	/*
+	 * Adjust the timestamps in the scan table to be relative to the newly
+	 * associated AP's TSF
+	 */
+	mwifiex_update_tsf_timestamps(priv, bss_desc);
+
+	if (bss_desc->wmm_ie.vend_hdr.element_id == WLAN_EID_VENDOR_SPECIFIC)
+		priv->curr_bss_params.wmm_enabled = true;
+	else
+		priv->curr_bss_params.wmm_enabled = false;
+
+	if ((priv->wmm_required || bss_desc->bcn_ht_cap)
+			&& priv->curr_bss_params.wmm_enabled)
+		priv->wmm_enabled = true;
+	else
+		priv->wmm_enabled = false;
+
+	priv->curr_bss_params.wmm_uapsd_enabled = false;
+
+	if (priv->wmm_enabled)
+		priv->curr_bss_params.wmm_uapsd_enabled
+			= ((bss_desc->wmm_ie.qos_info_bitmap &
+				IEEE80211_WMM_IE_AP_QOSINFO_UAPSD) ? 1 : 0);
+
+	dev_dbg(priv->adapter->dev, "info: ASSOC_RESP: curr_pkt_filter is %#x\n",
+	       priv->curr_pkt_filter);
+	if (priv->sec_info.wpa_enabled || priv->sec_info.wpa2_enabled)
+		priv->wpa_is_gtk_set = false;
+
+	if (priv->wmm_enabled) {
+		/* Don't re-enable carrier until we get the WMM_GET_STATUS
+		   event */
+		enable_data = false;
+	} else {
+		/* Since WMM is not enabled, setup the queues with the
+		   defaults */
+		mwifiex_wmm_setup_queue_priorities(priv, NULL);
+		mwifiex_wmm_setup_ac_downgrade(priv);
+	}
+
+	if (enable_data)
+		dev_dbg(priv->adapter->dev,
+			"info: post association, re-enabling data flow\n");
+
+	/* Reset SNR/NF/RSSI values */
+	priv->data_rssi_last = 0;
+	priv->data_nf_last = 0;
+	priv->data_rssi_avg = 0;
+	priv->data_nf_avg = 0;
+	priv->bcn_rssi_last = 0;
+	priv->bcn_nf_last = 0;
+	priv->bcn_rssi_avg = 0;
+	priv->bcn_nf_avg = 0;
+	priv->rxpd_rate = 0;
+	priv->rxpd_htinfo = 0;
+
+	mwifiex_save_curr_bcn(priv);
+
+	priv->adapter->dbg.num_cmd_assoc_success++;
+
+	dev_dbg(priv->adapter->dev, "info: ASSOC_RESP: associated\n");
+
+	/* Add the ra_list here for infra mode as there will be only 1 ra
+	   always */
+	mwifiex_ralist_add(priv,
+			   priv->curr_bss_params.bss_descriptor.mac_address);
+
+	if (!netif_carrier_ok(priv->netdev))
+		netif_carrier_on(priv->netdev);
+	if (netif_queue_stopped(priv->netdev))
+		netif_wake_queue(priv->netdev);
+
+	if (priv->sec_info.wpa_enabled || priv->sec_info.wpa2_enabled)
+		priv->scan_block = true;
+
+done:
+	/* Need to indicate IOCTL complete */
+	if (wait_queue) {
+		if (ret) {
+			if (assoc_rsp->status_code)
+				wait_queue->status =
+					le16_to_cpu(assoc_rsp->status_code);
+			else
+				wait_queue->status = MWIFIEX_ERROR_ASSOC_FAIL;
+		} else {
+			wait_queue->status = MWIFIEX_ERROR_NO_ERROR;
+		}
+	}
+
+	return ret;
+}
+
+/*
+ * This function prepares command for ad-hoc start.
+ *
+ * Driver will fill up SSID, BSS mode, IBSS parameters, physical
+ * parameters, probe delay, and capability information. Firmware
+ * will fill up beacon period, basic rates and operational rates.
+ *
+ * In addition, the following TLVs are added -
+ *      - Channel TLV
+ *      - Vendor specific IE
+ *      - WPA/WPA2 IE
+ *      - HT Capabilities IE
+ *      - HT Information IE
+ *
+ * Preparation also includes -
+ *      - Setting command ID and proper size
+ *      - Ensuring correct endian-ness
+ */
+int
+mwifiex_cmd_802_11_ad_hoc_start(struct mwifiex_private *priv,
+				struct host_cmd_ds_command *cmd, void *data_buf)
+{
+	int ret = 0, rsn_ie_len = 0;
+	struct mwifiex_adapter *adapter = priv->adapter;
+	struct host_cmd_ds_802_11_ad_hoc_start *adhoc_start =
+		&cmd->params.adhoc_start;
+	struct mwifiex_bssdescriptor *bss_desc;
+	u32 cmd_append_size = 0;
+	u32 i;
+	u16 tmp_cap;
+	uint16_t ht_cap_info;
+	struct mwifiex_ie_types_chan_list_param_set *chan_tlv;
+
+	struct mwifiex_ie_types_htcap *ht_cap;
+	struct mwifiex_ie_types_htinfo *ht_info;
+	u8 *pos = (u8 *) adhoc_start +
+			sizeof(struct host_cmd_ds_802_11_ad_hoc_start);
+
+	if (!adapter)
+		return -1;
+
+	cmd->command = cpu_to_le16(HostCmd_CMD_802_11_AD_HOC_START);
+
+	bss_desc = &priv->curr_bss_params.bss_descriptor;
+	priv->attempted_bss_desc = bss_desc;
+
+	/*
+	 * Fill in the parameters for 2 data structures:
+	 *   1. struct host_cmd_ds_802_11_ad_hoc_start command
+	 *   2. bss_desc
+	 * Driver will fill up SSID, bss_mode,IBSS param, Physical Param,
+	 * probe delay, and Cap info.
+	 * Firmware will fill up beacon period, Basic rates
+	 * and operational rates.
+	 */
+
+	memset(adhoc_start->ssid, 0, IEEE80211_MAX_SSID_LEN);
+
+	memcpy(adhoc_start->ssid,
+	       ((struct mwifiex_802_11_ssid *) data_buf)->ssid,
+	       ((struct mwifiex_802_11_ssid *) data_buf)->ssid_len);
+
+	dev_dbg(adapter->dev, "info: ADHOC_S_CMD: SSID = %s\n",
+				adhoc_start->ssid);
+
+	memset(bss_desc->ssid.ssid, 0, IEEE80211_MAX_SSID_LEN);
+	memcpy(bss_desc->ssid.ssid,
+	       ((struct mwifiex_802_11_ssid *) data_buf)->ssid,
+	       ((struct mwifiex_802_11_ssid *) data_buf)->ssid_len);
+
+	bss_desc->ssid.ssid_len =
+		((struct mwifiex_802_11_ssid *) data_buf)->ssid_len;
+
+	/* Set the BSS mode */
+	adhoc_start->bss_mode = HostCmd_BSS_MODE_IBSS;
+	bss_desc->bss_mode = MWIFIEX_BSS_MODE_IBSS;
+	adhoc_start->beacon_period = cpu_to_le16(priv->beacon_period);
+	bss_desc->beacon_period = priv->beacon_period;
+
+	/* Set Physical param set */
+/* Parameter IE Id */
+#define DS_PARA_IE_ID   3
+/* Parameter IE length */
+#define DS_PARA_IE_LEN  1
+
+	adhoc_start->phy_param_set.ds_param_set.element_id = DS_PARA_IE_ID;
+	adhoc_start->phy_param_set.ds_param_set.len = DS_PARA_IE_LEN;
+
+	if (!mwifiex_get_cfp_by_band_and_channel_from_cfg80211
+			(priv, adapter->adhoc_start_band, (u16)
+				priv->adhoc_channel)) {
+		struct mwifiex_chan_freq_power *cfp;
+		cfp = mwifiex_get_cfp_by_band_and_channel_from_cfg80211(priv,
+				adapter->adhoc_start_band, FIRST_VALID_CHANNEL);
+		if (cfp)
+			priv->adhoc_channel = (u8) cfp->channel;
+	}
+
+	if (!priv->adhoc_channel) {
+		dev_err(adapter->dev, "ADHOC_S_CMD: adhoc_channel cannot be 0\n");
+		return -1;
+	}
+
+	dev_dbg(adapter->dev, "info: ADHOC_S_CMD: creating ADHOC on channel %d\n",
+				priv->adhoc_channel);
+
+	priv->curr_bss_params.bss_descriptor.channel = priv->adhoc_channel;
+	priv->curr_bss_params.band = adapter->adhoc_start_band;
+
+	bss_desc->channel = priv->adhoc_channel;
+	adhoc_start->phy_param_set.ds_param_set.current_chan =
+		priv->adhoc_channel;
+
+	memcpy(&bss_desc->phy_param_set, &adhoc_start->phy_param_set,
+	       sizeof(union ieee_types_phy_param_set));
+
+	/* Set IBSS param set */
+/* IBSS parameter IE Id */
+#define IBSS_PARA_IE_ID   6
+/* IBSS parameter IE length */
+#define IBSS_PARA_IE_LEN  2
+
+	adhoc_start->ss_param_set.ibss_param_set.element_id = IBSS_PARA_IE_ID;
+	adhoc_start->ss_param_set.ibss_param_set.len = IBSS_PARA_IE_LEN;
+	adhoc_start->ss_param_set.ibss_param_set.atim_window
+		= cpu_to_le16(priv->atim_window);
+	memcpy(&bss_desc->ss_param_set, &adhoc_start->ss_param_set,
+	       sizeof(union ieee_types_ss_param_set));
+
+	/* Set Capability info */
+	bss_desc->cap_info_bitmap |= WLAN_CAPABILITY_IBSS;
+	tmp_cap = le16_to_cpu(adhoc_start->cap_info_bitmap);
+	tmp_cap &= ~WLAN_CAPABILITY_ESS;
+	tmp_cap |= WLAN_CAPABILITY_IBSS;
+
+	/* Set up privacy in bss_desc */
+	if (priv->sec_info.encryption_mode != MWIFIEX_ENCRYPTION_MODE_NONE) {
+		/* Ad-Hoc capability privacy on */
+		dev_dbg(adapter->dev,
+			"info: ADHOC_S_CMD: wep_status set privacy to WEP\n");
+		bss_desc->privacy = MWIFIEX_802_11_PRIV_FILTER_8021X_WEP;
+		tmp_cap |= WLAN_CAPABILITY_PRIVACY;
+	} else {
+		dev_dbg(adapter->dev, "info: ADHOC_S_CMD: wep_status NOT set,"
+				" setting privacy to ACCEPT ALL\n");
+		bss_desc->privacy = MWIFIEX_802_11_PRIV_FILTER_ACCEPT_ALL;
+	}
+
+	memset(adhoc_start->DataRate, 0, sizeof(adhoc_start->DataRate));
+	mwifiex_get_active_data_rates(priv, adhoc_start->DataRate);
+	if ((adapter->adhoc_start_band & BAND_G) &&
+	    (priv->curr_pkt_filter & HostCmd_ACT_MAC_ADHOC_G_PROTECTION_ON)) {
+		ret = mwifiex_prepare_cmd(priv, HostCmd_CMD_MAC_CONTROL,
+					  HostCmd_ACT_GEN_SET,
+					  0, NULL, &priv->curr_pkt_filter);
+
+		if (ret) {
+			dev_err(adapter->dev,
+			       "ADHOC_S_CMD: G Protection config failed\n");
+			return -1;
+		}
+	}
+	/* Find the last non zero */
+	for (i = 0; i < sizeof(adhoc_start->DataRate) &&
+			adhoc_start->DataRate[i];
+			i++)
+			;
+
+	priv->curr_bss_params.num_of_rates = i;
+
+	/* Copy the ad-hoc creating rates into Current BSS rate structure */
+	memcpy(&priv->curr_bss_params.data_rates,
+	       &adhoc_start->DataRate, priv->curr_bss_params.num_of_rates);
+
+	dev_dbg(adapter->dev, "info: ADHOC_S_CMD: rates=%02x %02x %02x %02x\n",
+	       adhoc_start->DataRate[0], adhoc_start->DataRate[1],
+	       adhoc_start->DataRate[2], adhoc_start->DataRate[3]);
+
+	dev_dbg(adapter->dev, "info: ADHOC_S_CMD: AD-HOC Start command is ready\n");
+
+	if (IS_SUPPORT_MULTI_BANDS(adapter)) {
+		/* Append a channel TLV */
+		chan_tlv = (struct mwifiex_ie_types_chan_list_param_set *) pos;
+		chan_tlv->header.type = cpu_to_le16(TLV_TYPE_CHANLIST);
+		chan_tlv->header.len =
+			cpu_to_le16(sizeof(struct mwifiex_chan_scan_param_set));
+
+		memset(chan_tlv->chan_scan_param, 0x00,
+		       sizeof(struct mwifiex_chan_scan_param_set));
+		chan_tlv->chan_scan_param[0].chan_number =
+			(u8) priv->curr_bss_params.bss_descriptor.channel;
+
+		dev_dbg(adapter->dev, "info: ADHOC_S_CMD: TLV Chan = %d\n",
+		       chan_tlv->chan_scan_param[0].chan_number);
+
+		chan_tlv->chan_scan_param[0].radio_type
+		       = mwifiex_band_to_radio_type(priv->curr_bss_params.band);
+		if (adapter->adhoc_start_band & BAND_GN
+		    || adapter->adhoc_start_band & BAND_AN) {
+			if (adapter->chan_offset == SEC_CHANNEL_ABOVE)
+				chan_tlv->chan_scan_param[0].radio_type |=
+					SECOND_CHANNEL_ABOVE;
+			else if (adapter->chan_offset == SEC_CHANNEL_BELOW)
+				chan_tlv->chan_scan_param[0].radio_type |=
+					SECOND_CHANNEL_BELOW;
+		}
+		dev_dbg(adapter->dev, "info: ADHOC_S_CMD: TLV Band = %d\n",
+		       chan_tlv->chan_scan_param[0].radio_type);
+		pos += sizeof(chan_tlv->header) +
+			sizeof(struct mwifiex_chan_scan_param_set);
+		cmd_append_size +=
+			sizeof(chan_tlv->header) +
+			sizeof(struct mwifiex_chan_scan_param_set);
+	}
+
+	/* Append vendor specific IE TLV */
+	cmd_append_size += mwifiex_cmd_append_vsie_tlv(priv,
+				MWIFIEX_VSIE_MASK_ADHOC, &pos);
+
+	if (priv->sec_info.wpa_enabled) {
+		rsn_ie_len = mwifiex_append_rsn_ie_wpa_wpa2(priv, &pos);
+		if (rsn_ie_len == -1)
+			return -1;
+		cmd_append_size += rsn_ie_len;
+	}
+
+	if (adapter->adhoc_11n_enabled) {
+		{
+			ht_cap = (struct mwifiex_ie_types_htcap *) pos;
+			memset(ht_cap, 0,
+			       sizeof(struct mwifiex_ie_types_htcap));
+			ht_cap->header.type =
+				cpu_to_le16(WLAN_EID_HT_CAPABILITY);
+			ht_cap->header.len =
+			       cpu_to_le16(sizeof(struct ieee80211_ht_cap));
+			ht_cap_info = le16_to_cpu(ht_cap->ht_cap.cap_info);
+
+			SETHT_SHORTGI20(ht_cap_info);
+			if (adapter->chan_offset) {
+				SETHT_SHORTGI40(ht_cap_info);
+				SETHT_DSSSCCK40(ht_cap_info);
+				SETHT_SUPPCHANWIDTH(ht_cap_info);
+				SETHT_MCS32(ht_cap->ht_cap.mcs.rx_mask);
+			}
+
+			ht_cap->ht_cap.ampdu_params_info
+					= MAX_RX_AMPDU_SIZE_64K;
+			ht_cap->ht_cap.mcs.rx_mask[0] = 0xff;
+			pos += sizeof(struct mwifiex_ie_types_htcap);
+			cmd_append_size +=
+				sizeof(struct mwifiex_ie_types_htcap);
+		}
+		{
+			ht_info = (struct mwifiex_ie_types_htinfo *) pos;
+			memset(ht_info, 0,
+			       sizeof(struct mwifiex_ie_types_htinfo));
+			ht_info->header.type =
+				cpu_to_le16(WLAN_EID_HT_INFORMATION);
+			ht_info->header.len =
+				cpu_to_le16(sizeof(struct ieee80211_ht_info));
+			ht_info->ht_info.control_chan =
+				(u8) priv->curr_bss_params.bss_descriptor.
+				channel;
+			if (adapter->chan_offset) {
+				ht_info->ht_info.ht_param =
+					adapter->chan_offset;
+				SET_CHANWIDTH40(ht_info->ht_info.ht_param);
+			}
+			ht_info->ht_info.operation_mode =
+				cpu_to_le16(NON_GREENFIELD_STAS);
+			ht_info->ht_info.basic_set[0] = 0xff;
+			pos += sizeof(struct mwifiex_ie_types_htinfo);
+			cmd_append_size +=
+				sizeof(struct mwifiex_ie_types_htinfo);
+		}
+	}
+
+	cmd->size = cpu_to_le16((u16)
+			    (sizeof(struct host_cmd_ds_802_11_ad_hoc_start)
+			     + S_DS_GEN + cmd_append_size));
+
+	if (adapter->adhoc_start_band == BAND_B)
+		SHORT_SLOT_TIME_DISABLED(tmp_cap);
+	else
+		SHORT_SLOT_TIME_ENABLED(tmp_cap);
+
+	adhoc_start->cap_info_bitmap = cpu_to_le16(tmp_cap);
+
+	return 0;
+}
+
+/*
+ * This function prepares command for ad-hoc join.
+ *
+ * Most of the parameters are set up by copying from the target BSS descriptor
+ * from the scan response.
+ *
+ * In addition, the following TLVs are added -
+ *      - Channel TLV
+ *      - Vendor specific IE
+ *      - WPA/WPA2 IE
+ *      - 11n IE
+ *
+ * Preparation also includes -
+ *      - Setting command ID and proper size
+ *      - Ensuring correct endian-ness
+ */
+int
+mwifiex_cmd_802_11_ad_hoc_join(struct mwifiex_private *priv,
+			       struct host_cmd_ds_command *cmd, void *data_buf)
+{
+	int ret = 0, rsn_ie_len = 0;
+	struct host_cmd_ds_802_11_ad_hoc_join *adhoc_join =
+		&cmd->params.adhoc_join;
+	struct mwifiex_bssdescriptor *bss_desc =
+		(struct mwifiex_bssdescriptor *) data_buf;
+	struct mwifiex_ie_types_chan_list_param_set *chan_tlv;
+	u32 cmd_append_size = 0;
+	u16 tmp_cap;
+	u32 i, rates_size = 0;
+	u16 curr_pkt_filter;
+	u8 *pos =
+		(u8 *) adhoc_join +
+		sizeof(struct host_cmd_ds_802_11_ad_hoc_join);
+
+/* Use G protection */
+#define USE_G_PROTECTION        0x02
+	if (bss_desc->erp_flags & USE_G_PROTECTION) {
+		curr_pkt_filter =
+			priv->
+			curr_pkt_filter | HostCmd_ACT_MAC_ADHOC_G_PROTECTION_ON;
+
+		ret = mwifiex_prepare_cmd(priv, HostCmd_CMD_MAC_CONTROL,
+					  HostCmd_ACT_GEN_SET, 0, NULL,
+					  &curr_pkt_filter);
+		if (ret) {
+			dev_err(priv->adapter->dev,
+			       "ADHOC_J_CMD: G Protection config failed\n");
+			return -1;
+		}
+	}
+
+	priv->attempted_bss_desc = bss_desc;
+
+	cmd->command = cpu_to_le16(HostCmd_CMD_802_11_AD_HOC_JOIN);
+
+	adhoc_join->bss_descriptor.bss_mode = HostCmd_BSS_MODE_IBSS;
+
+	adhoc_join->bss_descriptor.beacon_period
+		= cpu_to_le16(bss_desc->beacon_period);
+
+	memcpy(&adhoc_join->bss_descriptor.bssid,
+	       &bss_desc->mac_address, ETH_ALEN);
+
+	memcpy(&adhoc_join->bss_descriptor.ssid,
+	       &bss_desc->ssid.ssid, bss_desc->ssid.ssid_len);
+
+	memcpy(&adhoc_join->bss_descriptor.phy_param_set,
+	       &bss_desc->phy_param_set,
+	       sizeof(union ieee_types_phy_param_set));
+
+	memcpy(&adhoc_join->bss_descriptor.ss_param_set,
+	       &bss_desc->ss_param_set, sizeof(union ieee_types_ss_param_set));
+
+	tmp_cap = bss_desc->cap_info_bitmap;
+
+	tmp_cap &= CAPINFO_MASK;
+
+	dev_dbg(priv->adapter->dev, "info: ADHOC_J_CMD: tmp_cap=%4X"
+			" CAPINFO_MASK=%4lX\n", tmp_cap, CAPINFO_MASK);
+
+	/* Information on BSSID descriptor passed to FW */
+	dev_dbg(priv->adapter->dev, "info: ADHOC_J_CMD: BSSID = %pM, SSID = %s\n",
+				adhoc_join->bss_descriptor.bssid,
+				adhoc_join->bss_descriptor.ssid);
+
+	for (i = 0; bss_desc->supported_rates[i] &&
+			i < MWIFIEX_SUPPORTED_RATES;
+			i++)
+			;
+	rates_size = i;
+
+	/* Copy Data Rates from the Rates recorded in scan response */
+	memset(adhoc_join->bss_descriptor.data_rates, 0,
+	       sizeof(adhoc_join->bss_descriptor.data_rates));
+	memcpy(adhoc_join->bss_descriptor.data_rates,
+	       bss_desc->supported_rates, rates_size);
+
+	/* Copy the adhoc join rates into Current BSS state structure */
+	priv->curr_bss_params.num_of_rates = rates_size;
+	memcpy(&priv->curr_bss_params.data_rates, bss_desc->supported_rates,
+	       rates_size);
+
+	/* Copy the channel information */
+	priv->curr_bss_params.bss_descriptor.channel = bss_desc->channel;
+	priv->curr_bss_params.band = (u8) bss_desc->bss_band;
+
+	if (priv->sec_info.wep_status == MWIFIEX_802_11_WEP_ENABLED
+	    || priv->sec_info.wpa_enabled)
+		tmp_cap |= WLAN_CAPABILITY_PRIVACY;
+
+	if (IS_SUPPORT_MULTI_BANDS(priv->adapter)) {
+		/* Append a channel TLV */
+		chan_tlv = (struct mwifiex_ie_types_chan_list_param_set *) pos;
+		chan_tlv->header.type = cpu_to_le16(TLV_TYPE_CHANLIST);
+		chan_tlv->header.len =
+			cpu_to_le16(sizeof(struct mwifiex_chan_scan_param_set));
+
+		memset(chan_tlv->chan_scan_param, 0x00,
+		       sizeof(struct mwifiex_chan_scan_param_set));
+		chan_tlv->chan_scan_param[0].chan_number =
+			(bss_desc->phy_param_set.ds_param_set.current_chan);
+		dev_dbg(priv->adapter->dev, "info: ADHOC_J_CMD: TLV Chan = %d\n",
+		       chan_tlv->chan_scan_param[0].chan_number);
+
+		chan_tlv->chan_scan_param[0].radio_type =
+			mwifiex_band_to_radio_type((u8) bss_desc->bss_band);
+
+		dev_dbg(priv->adapter->dev, "info: ADHOC_J_CMD: TLV Band = %d\n",
+		       chan_tlv->chan_scan_param[0].radio_type);
+		pos += sizeof(chan_tlv->header) +
+			sizeof(struct mwifiex_chan_scan_param_set);
+		cmd_append_size += sizeof(chan_tlv->header) +
+			sizeof(struct mwifiex_chan_scan_param_set);
+	}
+
+	if (priv->sec_info.wpa_enabled)
+		rsn_ie_len = mwifiex_append_rsn_ie_wpa_wpa2(priv, &pos);
+	if (rsn_ie_len == -1)
+		return -1;
+	cmd_append_size += rsn_ie_len;
+
+	if (ISSUPP_11NENABLED(priv->adapter->fw_cap_info))
+		cmd_append_size += mwifiex_cmd_append_11n_tlv(priv,
+			bss_desc, &pos);
+
+	/* Append vendor specific IE TLV */
+	cmd_append_size += mwifiex_cmd_append_vsie_tlv(priv,
+			MWIFIEX_VSIE_MASK_ADHOC, &pos);
+
+	cmd->size = cpu_to_le16((u16)
+			    (sizeof(struct host_cmd_ds_802_11_ad_hoc_join)
+			     + S_DS_GEN + cmd_append_size));
+
+	adhoc_join->bss_descriptor.cap_info_bitmap = cpu_to_le16(tmp_cap);
+
+	return ret;
+}
+
+/*
+ * This function handles the command response of ad-hoc start and
+ * ad-hoc join.
+ *
+ * The function generates a device-connected event to notify
+ * the applications, in case of successful ad-hoc start/join, and
+ * saves the beacon buffer.
+ */
+int mwifiex_ret_802_11_ad_hoc(struct mwifiex_private *priv,
+			      struct host_cmd_ds_command *resp, void *wq_buf)
+{
+	int ret = 0;
+	struct mwifiex_wait_queue *wait_queue =
+		(struct mwifiex_wait_queue *) wq_buf;
+	struct host_cmd_ds_802_11_ad_hoc_result *adhoc_result;
+	struct mwifiex_bssdescriptor *bss_desc;
+	u16 command = le16_to_cpu(resp->command);
+	u16 result = le16_to_cpu(resp->result);
+
+	adhoc_result = &resp->params.adhoc_result;
+
+	bss_desc = priv->attempted_bss_desc;
+
+	/* Join result code 0 --> SUCCESS */
+	if (result) {
+		dev_err(priv->adapter->dev, "ADHOC_RESP: failed\n");
+		if (priv->media_connected)
+			mwifiex_reset_connect_state(priv);
+
+		memset(&priv->curr_bss_params.bss_descriptor,
+		       0x00, sizeof(struct mwifiex_bssdescriptor));
+
+		ret = -1;
+		goto done;
+	}
+
+	/* Send a Media Connected event, according to the Spec */
+	priv->media_connected = true;
+
+	if (command == HostCmd_CMD_802_11_AD_HOC_START) {
+		dev_dbg(priv->adapter->dev, "info: ADHOC_S_RESP %s\n",
+				bss_desc->ssid.ssid);
+
+		/* Update the created network descriptor with the new BSSID */
+		memcpy(bss_desc->mac_address,
+		       adhoc_result->bssid, ETH_ALEN);
+
+		priv->adhoc_state = ADHOC_STARTED;
+	} else {
+		/*
+		 * Now the join cmd should be successful.
+		 * If BSSID has changed use SSID to compare instead of BSSID
+		 */
+		dev_dbg(priv->adapter->dev, "info: ADHOC_J_RESP %s\n",
+				bss_desc->ssid.ssid);
+
+		/*
+		 * Make a copy of current BSSID descriptor, only needed for
+		 * join since the current descriptor is already being used
+		 * for adhoc start
+		 */
+		memcpy(&priv->curr_bss_params.bss_descriptor,
+		       bss_desc, sizeof(struct mwifiex_bssdescriptor));
+
+		priv->adhoc_state = ADHOC_JOINED;
+	}
+
+	dev_dbg(priv->adapter->dev, "info: ADHOC_RESP: channel = %d\n",
+				priv->adhoc_channel);
+	dev_dbg(priv->adapter->dev, "info: ADHOC_RESP: BSSID = %pM\n",
+	       priv->curr_bss_params.bss_descriptor.mac_address);
+
+	if (!netif_carrier_ok(priv->netdev))
+		netif_carrier_on(priv->netdev);
+	if (netif_queue_stopped(priv->netdev))
+		netif_wake_queue(priv->netdev);
+
+	mwifiex_save_curr_bcn(priv);
+
+done:
+	/* Need to indicate IOCTL complete */
+	if (wait_queue) {
+		if (ret)
+			wait_queue->status = MWIFIEX_ERROR_ASSOC_FAIL;
+		else
+			wait_queue->status = MWIFIEX_ERROR_NO_ERROR;
+
+	}
+
+	return ret;
+}
+
+/*
+ * This function associates to a specific BSS discovered in a scan.
+ *
+ * It clears any past association response stored for application
+ * retrieval and calls the command preparation routine to send the
+ * command to firmware.
+ */
+int mwifiex_associate(struct mwifiex_private *priv,
+		      void *wait_queue, struct mwifiex_bssdescriptor *bss_desc)
+{
+	int ret = 0;
+	u8 current_bssid[ETH_ALEN];
+
+	/* Return error if the adapter or table entry is not marked as infra */
+	if ((priv->bss_mode != MWIFIEX_BSS_MODE_INFRA) ||
+	    (bss_desc->bss_mode != MWIFIEX_BSS_MODE_INFRA))
+		return -1;
+
+	memcpy(&current_bssid,
+	       &priv->curr_bss_params.bss_descriptor.mac_address,
+	       sizeof(current_bssid));
+
+	/* Clear any past association response stored for application
+	   retrieval */
+	priv->assoc_rsp_size = 0;
+
+	ret = mwifiex_prepare_cmd(priv, HostCmd_CMD_802_11_ASSOCIATE,
+				  HostCmd_ACT_GEN_SET, 0, wait_queue,
+				  bss_desc);
+
+	return ret;
+}
+
+/*
+ * This function starts an ad-hoc network.
+ *
+ * It calls the command preparation routine to send the command to firmware.
+ */
+int
+mwifiex_adhoc_start(struct mwifiex_private *priv,
+		    void *wait_queue, struct mwifiex_802_11_ssid *adhoc_ssid)
+{
+	int ret = 0;
+
+	dev_dbg(priv->adapter->dev, "info: Adhoc Channel = %d\n",
+		priv->adhoc_channel);
+	dev_dbg(priv->adapter->dev, "info: curr_bss_params.channel = %d\n",
+	       priv->curr_bss_params.bss_descriptor.channel);
+	dev_dbg(priv->adapter->dev, "info: curr_bss_params.band = %d\n",
+	       priv->curr_bss_params.band);
+
+	ret = mwifiex_prepare_cmd(priv, HostCmd_CMD_802_11_AD_HOC_START,
+				  HostCmd_ACT_GEN_SET, 0, wait_queue,
+				  adhoc_ssid);
+
+	return ret;
+}
+
+/*
+ * This function joins an ad-hoc network found in a previous scan.
+ *
+ * It calls the command preparation routine to send the command to firmware,
+ * if already not connected to the requested SSID.
+ */
+int mwifiex_adhoc_join(struct mwifiex_private *priv,
+		       void *wait_queue, struct mwifiex_bssdescriptor *bss_desc)
+{
+	int ret = 0;
+
+	dev_dbg(priv->adapter->dev, "info: adhoc join: curr_bss ssid =%s\n",
+	       priv->curr_bss_params.bss_descriptor.ssid.ssid);
+	dev_dbg(priv->adapter->dev, "info: adhoc join: curr_bss ssid_len =%u\n",
+	       priv->curr_bss_params.bss_descriptor.ssid.ssid_len);
+	dev_dbg(priv->adapter->dev, "info: adhoc join: ssid =%s\n",
+		bss_desc->ssid.ssid);
+	dev_dbg(priv->adapter->dev, "info: adhoc join: ssid_len =%u\n",
+	       bss_desc->ssid.ssid_len);
+
+	/* Check if the requested SSID is already joined */
+	if (priv->curr_bss_params.bss_descriptor.ssid.ssid_len &&
+	    !mwifiex_ssid_cmp(&bss_desc->ssid,
+			      &priv->curr_bss_params.bss_descriptor.ssid) &&
+	    (priv->curr_bss_params.bss_descriptor.bss_mode ==
+	     MWIFIEX_BSS_MODE_IBSS)) {
+		dev_dbg(priv->adapter->dev, "info: ADHOC_J_CMD: new ad-hoc SSID"
+			" is the same as current; not attempting to re-join\n");
+		return -1;
+	}
+
+	dev_dbg(priv->adapter->dev, "info: curr_bss_params.channel = %d\n",
+	       priv->curr_bss_params.bss_descriptor.channel);
+	dev_dbg(priv->adapter->dev, "info: curr_bss_params.band = %c\n",
+	       priv->curr_bss_params.band);
+
+	ret = mwifiex_prepare_cmd(priv, HostCmd_CMD_802_11_AD_HOC_JOIN,
+				  HostCmd_ACT_GEN_SET, 0, wait_queue,
+				  bss_desc);
+
+	return ret;
+}
+
+/*
+ * This function deauthenticates/disconnects from infra network by sending
+ * deauthentication request.
+ */
+static int mwifiex_deauthenticate_infra(struct mwifiex_private *priv,
+					struct mwifiex_wait_queue *wait,
+					u8 *mac)
+{
+	u8 mac_address[ETH_ALEN];
+	int ret = 0;
+	u8 zero_mac[ETH_ALEN] = { 0, 0, 0, 0, 0, 0 };
+
+	if (mac) {
+		if (!memcmp(mac, zero_mac, sizeof(zero_mac)))
+			memcpy((u8 *) &mac_address,
+			       (u8 *) &priv->curr_bss_params.bss_descriptor.
+			       mac_address, ETH_ALEN);
+		else
+			memcpy((u8 *) &mac_address, (u8 *) mac, ETH_ALEN);
+	} else {
+		memcpy((u8 *) &mac_address, (u8 *) &priv->curr_bss_params.
+		       bss_descriptor.mac_address, ETH_ALEN);
+	}
+
+	ret = mwifiex_prepare_cmd(priv, HostCmd_CMD_802_11_DEAUTHENTICATE,
+				  HostCmd_ACT_GEN_SET, 0, wait, &mac_address);
+
+	if (!ret && wait)
+		ret = -EINPROGRESS;
+
+	return ret;
+}
+
+/*
+ * This function deauthenticates/disconnects from a BSS.
+ *
+ * In case of infra made, it sends deauthentication request, and
+ * in case of ad-hoc mode, a stop network request is sent to the firmware.
+ */
+int mwifiex_deauthenticate(struct mwifiex_private *priv,
+			   struct mwifiex_wait_queue *wait, u8 *mac)
+{
+	int ret = 0;
+
+	if (priv->media_connected) {
+		if (priv->bss_mode == MWIFIEX_BSS_MODE_INFRA) {
+			ret = mwifiex_deauthenticate_infra(priv, wait, mac);
+		} else if (priv->bss_mode == MWIFIEX_BSS_MODE_IBSS) {
+			ret = mwifiex_prepare_cmd(priv,
+					HostCmd_CMD_802_11_AD_HOC_STOP,
+					HostCmd_ACT_GEN_SET, 0, wait, NULL);
+
+			if (!ret && wait)
+				ret = -EINPROGRESS;
+		}
+	}
+
+	return ret;
+}
+
+/*
+ * This function converts band to radio type used in channel TLV.
+ */
+u8
+mwifiex_band_to_radio_type(u8 band)
+{
+	u8 ret_radio_type;
+
+	switch (band) {
+	case BAND_A:
+	case BAND_AN:
+	case BAND_A | BAND_AN:
+		ret_radio_type = HostCmd_SCAN_RADIO_TYPE_A;
+		break;
+	case BAND_B:
+	case BAND_G:
+	case BAND_B | BAND_G:
+	default:
+		ret_radio_type = HostCmd_SCAN_RADIO_TYPE_BG;
+		break;
+	}
+
+	return ret_radio_type;
+}