Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input

[linux-btrfs-devel.git] / drivers / net / wireless / mwifiex / join.c

/*
 * 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;
        __le64 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);

        /* TSF at the time when beacon/probe_response was received */
        tsf_val = cpu_to_le64(bss_desc->network_tsf);
        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;
        u8 *ptr = rate1, *tmp;
        u32 i, j;

        tmp = kmemdup(rate1, rate1_size, GFP_KERNEL);
        if (!tmp) {
                dev_err(priv->adapter->dev, "failed to alloc tmp buf\n");
                return -ENOMEM;
        }

        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;

        /* 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 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,
                                 struct mwifiex_bssdescriptor *bss_desc)
{
        struct host_cmd_ds_802_11_associate *assoc = &cmd->params.associate;
        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;

        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 */
        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(NL80211_AUTHTYPE_OPEN_SYSTEM);

        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)
                tmp_cap &= ~WLAN_CAPABILITY_SHORT_SLOT_TIME;

        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)
{
        struct mwifiex_adapter *adapter = priv->adapter;
        int ret = 0;
        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;

        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 (adapter->curr_cmd->wait_q_enabled) {
                if (ret)
                        adapter->cmd_wait_q.status = -1;
                else
                        adapter->cmd_wait_q.status = 0;
        }

        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,
                                struct mwifiex_802_11_ssid *req_ssid)
{
        int 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, req_ssid->ssid, req_ssid->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, req_ssid->ssid, req_ssid->ssid_len);

        bss_desc->ssid.ssid_len = req_ssid->ssid_len;

        /* Set the BSS mode */
        adhoc_start->bss_mode = HostCmd_BSS_MODE_IBSS;
        bss_desc->bss_mode = NL80211_IFTYPE_ADHOC;
        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) {
                /* 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)) {
                if (mwifiex_send_cmd_async(priv, HostCmd_CMD_MAC_CONTROL,
                                             HostCmd_ACT_GEN_SET, 0,
                                             &priv->curr_pkt_filter)) {
                        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);

                        ht_cap_info |= IEEE80211_HT_CAP_SGI_20;
                        if (adapter->chan_offset) {
                                ht_cap_info |= IEEE80211_HT_CAP_SGI_40;
                                ht_cap_info |= IEEE80211_HT_CAP_DSSSCCK40;
                                ht_cap_info |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
                                SETHT_MCS32(ht_cap->ht_cap.mcs.rx_mask);
                        }

                        ht_cap->ht_cap.ampdu_params_info
                                        = IEEE80211_HT_MAX_AMPDU_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;
                                ht_info->ht_info.ht_param |=
                                        IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
                        }
                        ht_info->ht_info.operation_mode =
                             cpu_to_le16(IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
                        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)
                tmp_cap &= ~WLAN_CAPABILITY_SHORT_SLOT_TIME;
        else
                tmp_cap |= WLAN_CAPABILITY_SHORT_SLOT_TIME;

        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,
                               struct mwifiex_bssdescriptor *bss_desc)
{
        int rsn_ie_len = 0;
        struct host_cmd_ds_802_11_ad_hoc_join *adhoc_join =
                &cmd->params.adhoc_join;
        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;

                if (mwifiex_send_cmd_async(priv, HostCmd_CMD_MAC_CONTROL,
                                             HostCmd_ACT_GEN_SET, 0,
                                             &curr_pkt_filter)) {
                        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 0;
}

/*
 * 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)
{
        int ret = 0;
        struct mwifiex_adapter *adapter = priv->adapter;
        struct host_cmd_ds_802_11_ad_hoc_result *adhoc_result;
        struct mwifiex_bssdescriptor *bss_desc;

        adhoc_result = &resp->params.adhoc_result;

        bss_desc = priv->attempted_bss_desc;

        /* Join result code 0 --> SUCCESS */
        if (le16_to_cpu(resp->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 (le16_to_cpu(resp->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 (adapter->curr_cmd->wait_q_enabled) {
                if (ret)
                        adapter->cmd_wait_q.status = -1;
                else
                        adapter->cmd_wait_q.status = 0;

        }

        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,
                      struct mwifiex_bssdescriptor *bss_desc)
{
        u8 current_bssid[ETH_ALEN];

        /* Return error if the adapter or table entry is not marked as infra */
        if ((priv->bss_mode != NL80211_IFTYPE_STATION) ||
            (bss_desc->bss_mode != NL80211_IFTYPE_STATION))
                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;

        return mwifiex_send_cmd_sync(priv, HostCmd_CMD_802_11_ASSOCIATE,
                                    HostCmd_ACT_GEN_SET, 0, bss_desc);
}

/*
 * 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,
                    struct mwifiex_802_11_ssid *adhoc_ssid)
{
        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);

        return mwifiex_send_cmd_sync(priv, HostCmd_CMD_802_11_AD_HOC_START,
                                    HostCmd_ACT_GEN_SET, 0, adhoc_ssid);
}

/*
 * 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,
                       struct mwifiex_bssdescriptor *bss_desc)
{
        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 ==
                                                        NL80211_IFTYPE_ADHOC)) {
                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);

        return mwifiex_send_cmd_sync(priv, HostCmd_CMD_802_11_AD_HOC_JOIN,
                                    HostCmd_ACT_GEN_SET, 0, bss_desc);
}

/*
 * This function deauthenticates/disconnects from infra network by sending
 * deauthentication request.
 */
static int mwifiex_deauthenticate_infra(struct mwifiex_private *priv, u8 *mac)
{
        u8 mac_address[ETH_ALEN];
        int ret;
        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_send_cmd_sync(priv, HostCmd_CMD_802_11_DEAUTHENTICATE,
                                    HostCmd_ACT_GEN_SET, 0, &mac_address);

        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, u8 *mac)
{
        int ret = 0;

        if (priv->media_connected) {
                if (priv->bss_mode == NL80211_IFTYPE_STATION) {
                        ret = mwifiex_deauthenticate_infra(priv, mac);
                } else if (priv->bss_mode == NL80211_IFTYPE_ADHOC) {
                        ret = mwifiex_send_cmd_sync(priv,
                                                HostCmd_CMD_802_11_AD_HOC_STOP,
                                                HostCmd_ACT_GEN_SET, 0, NULL);
                }
        }

        return ret;
}
EXPORT_SYMBOL_GPL(mwifiex_deauthenticate);

/*
 * This function converts band to radio type used in channel TLV.
 */
u8
mwifiex_band_to_radio_type(u8 band)
{
        switch (band) {
        case BAND_A:
        case BAND_AN:
        case BAND_A | BAND_AN:
                return HostCmd_SCAN_RADIO_TYPE_A;
        case BAND_B:
        case BAND_G:
        case BAND_B | BAND_G:
        default:
                return HostCmd_SCAN_RADIO_TYPE_BG;
        }
}