/*
 * Copyright (c) 2010 Broadcom Corporation
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

/* Toplevel file. Relies on dhd_linux.c to send commands to the dongle. */

#include <linux/kernel.h>
#include <linux/if_arp.h>
#include <linux/sched.h>
#include <linux/kthread.h>
#include <linux/netdevice.h>
#include <linux/bitops.h>
#include <linux/etherdevice.h>
#include <linux/ieee80211.h>
#include <linux/uaccess.h>
#include <net/cfg80211.h>

#include <brcmu_utils.h>
#include <defs.h>
#include <brcmu_wifi.h>
#include "dhd.h"
#include "wl_cfg80211.h"

#define BRCMF_ASSOC_PARAMS_FIXED_SIZE \
        (sizeof(struct brcmf_assoc_params_le) - sizeof(u16))

static const u8 ether_bcast[ETH_ALEN] = {255, 255, 255, 255, 255, 255};

static u32 brcmf_dbg_level = WL_DBG_ERR;

static void brcmf_set_drvdata(struct brcmf_cfg80211_dev *dev, void *data)
{
        dev->driver_data = data;
}

static void *brcmf_get_drvdata(struct brcmf_cfg80211_dev *dev)
{
        void *data = NULL;

        if (dev)
                data = dev->driver_data;
        return data;
}

static
struct brcmf_cfg80211_priv *brcmf_priv_get(struct brcmf_cfg80211_dev *cfg_dev)
{
        struct brcmf_cfg80211_iface *ci = brcmf_get_drvdata(cfg_dev);
        return ci->cfg_priv;
}

static bool check_sys_up(struct wiphy *wiphy)
{
        struct brcmf_cfg80211_priv *cfg_priv = wiphy_to_cfg(wiphy);
        if (!test_bit(WL_STATUS_READY, &cfg_priv->status)) {
                WL_INFO("device is not ready : status (%d)\n",
                        (int)cfg_priv->status);
                return false;
        }
        return true;
}

#define CHAN2G(_channel, _freq, _flags) {                       \
        .band                   = IEEE80211_BAND_2GHZ,          \
        .center_freq            = (_freq),                      \
        .hw_value               = (_channel),                   \
        .flags                  = (_flags),                     \
        .max_antenna_gain       = 0,                            \
        .max_power              = 30,                           \
}

#define CHAN5G(_channel, _flags) {                              \
        .band                   = IEEE80211_BAND_5GHZ,          \
        .center_freq            = 5000 + (5 * (_channel)),      \
        .hw_value               = (_channel),                   \
        .flags                  = (_flags),                     \
        .max_antenna_gain       = 0,                            \
        .max_power              = 30,                           \
}

#define RATE_TO_BASE100KBPS(rate)   (((rate) * 10) / 2)
#define RATETAB_ENT(_rateid, _flags) \
        {                                                               \
                .bitrate        = RATE_TO_BASE100KBPS(_rateid),     \
                .hw_value       = (_rateid),                            \
                .flags          = (_flags),                             \
        }

static struct ieee80211_rate __wl_rates[] = {
        RATETAB_ENT(BRCM_RATE_1M, 0),
        RATETAB_ENT(BRCM_RATE_2M, IEEE80211_RATE_SHORT_PREAMBLE),
        RATETAB_ENT(BRCM_RATE_5M5, IEEE80211_RATE_SHORT_PREAMBLE),
        RATETAB_ENT(BRCM_RATE_11M, IEEE80211_RATE_SHORT_PREAMBLE),
        RATETAB_ENT(BRCM_RATE_6M, 0),
        RATETAB_ENT(BRCM_RATE_9M, 0),
        RATETAB_ENT(BRCM_RATE_12M, 0),
        RATETAB_ENT(BRCM_RATE_18M, 0),
        RATETAB_ENT(BRCM_RATE_24M, 0),
        RATETAB_ENT(BRCM_RATE_36M, 0),
        RATETAB_ENT(BRCM_RATE_48M, 0),
        RATETAB_ENT(BRCM_RATE_54M, 0),
};

#define wl_a_rates              (__wl_rates + 4)
#define wl_a_rates_size 8
#define wl_g_rates              (__wl_rates + 0)
#define wl_g_rates_size 12

static struct ieee80211_channel __wl_2ghz_channels[] = {
        CHAN2G(1, 2412, 0),
        CHAN2G(2, 2417, 0),
        CHAN2G(3, 2422, 0),
        CHAN2G(4, 2427, 0),
        CHAN2G(5, 2432, 0),
        CHAN2G(6, 2437, 0),
        CHAN2G(7, 2442, 0),
        CHAN2G(8, 2447, 0),
        CHAN2G(9, 2452, 0),
        CHAN2G(10, 2457, 0),
        CHAN2G(11, 2462, 0),
        CHAN2G(12, 2467, 0),
        CHAN2G(13, 2472, 0),
        CHAN2G(14, 2484, 0),
};

static struct ieee80211_channel __wl_5ghz_a_channels[] = {
        CHAN5G(34, 0), CHAN5G(36, 0),
        CHAN5G(38, 0), CHAN5G(40, 0),
        CHAN5G(42, 0), CHAN5G(44, 0),
        CHAN5G(46, 0), CHAN5G(48, 0),
        CHAN5G(52, 0), CHAN5G(56, 0),
        CHAN5G(60, 0), CHAN5G(64, 0),
        CHAN5G(100, 0), CHAN5G(104, 0),
        CHAN5G(108, 0), CHAN5G(112, 0),
        CHAN5G(116, 0), CHAN5G(120, 0),
        CHAN5G(124, 0), CHAN5G(128, 0),
        CHAN5G(132, 0), CHAN5G(136, 0),
        CHAN5G(140, 0), CHAN5G(149, 0),
        CHAN5G(153, 0), CHAN5G(157, 0),
        CHAN5G(161, 0), CHAN5G(165, 0),
        CHAN5G(184, 0), CHAN5G(188, 0),
        CHAN5G(192, 0), CHAN5G(196, 0),
        CHAN5G(200, 0), CHAN5G(204, 0),
        CHAN5G(208, 0), CHAN5G(212, 0),
        CHAN5G(216, 0),
};

static struct ieee80211_channel __wl_5ghz_n_channels[] = {
        CHAN5G(32, 0), CHAN5G(34, 0),
        CHAN5G(36, 0), CHAN5G(38, 0),
        CHAN5G(40, 0), CHAN5G(42, 0),
        CHAN5G(44, 0), CHAN5G(46, 0),
        CHAN5G(48, 0), CHAN5G(50, 0),
        CHAN5G(52, 0), CHAN5G(54, 0),
        CHAN5G(56, 0), CHAN5G(58, 0),
        CHAN5G(60, 0), CHAN5G(62, 0),
        CHAN5G(64, 0), CHAN5G(66, 0),
        CHAN5G(68, 0), CHAN5G(70, 0),
        CHAN5G(72, 0), CHAN5G(74, 0),
        CHAN5G(76, 0), CHAN5G(78, 0),
        CHAN5G(80, 0), CHAN5G(82, 0),
        CHAN5G(84, 0), CHAN5G(86, 0),
        CHAN5G(88, 0), CHAN5G(90, 0),
        CHAN5G(92, 0), CHAN5G(94, 0),
        CHAN5G(96, 0), CHAN5G(98, 0),
        CHAN5G(100, 0), CHAN5G(102, 0),
        CHAN5G(104, 0), CHAN5G(106, 0),
        CHAN5G(108, 0), CHAN5G(110, 0),
        CHAN5G(112, 0), CHAN5G(114, 0),
        CHAN5G(116, 0), CHAN5G(118, 0),
        CHAN5G(120, 0), CHAN5G(122, 0),
        CHAN5G(124, 0), CHAN5G(126, 0),
        CHAN5G(128, 0), CHAN5G(130, 0),
        CHAN5G(132, 0), CHAN5G(134, 0),
        CHAN5G(136, 0), CHAN5G(138, 0),
        CHAN5G(140, 0), CHAN5G(142, 0),
        CHAN5G(144, 0), CHAN5G(145, 0),
        CHAN5G(146, 0), CHAN5G(147, 0),
        CHAN5G(148, 0), CHAN5G(149, 0),
        CHAN5G(150, 0), CHAN5G(151, 0),
        CHAN5G(152, 0), CHAN5G(153, 0),
        CHAN5G(154, 0), CHAN5G(155, 0),
        CHAN5G(156, 0), CHAN5G(157, 0),
        CHAN5G(158, 0), CHAN5G(159, 0),
        CHAN5G(160, 0), CHAN5G(161, 0),
        CHAN5G(162, 0), CHAN5G(163, 0),
        CHAN5G(164, 0), CHAN5G(165, 0),
        CHAN5G(166, 0), CHAN5G(168, 0),
        CHAN5G(170, 0), CHAN5G(172, 0),
        CHAN5G(174, 0), CHAN5G(176, 0),
        CHAN5G(178, 0), CHAN5G(180, 0),
        CHAN5G(182, 0), CHAN5G(184, 0),
        CHAN5G(186, 0), CHAN5G(188, 0),
        CHAN5G(190, 0), CHAN5G(192, 0),
        CHAN5G(194, 0), CHAN5G(196, 0),
        CHAN5G(198, 0), CHAN5G(200, 0),
        CHAN5G(202, 0), CHAN5G(204, 0),
        CHAN5G(206, 0), CHAN5G(208, 0),
        CHAN5G(210, 0), CHAN5G(212, 0),
        CHAN5G(214, 0), CHAN5G(216, 0),
        CHAN5G(218, 0), CHAN5G(220, 0),
        CHAN5G(222, 0), CHAN5G(224, 0),
        CHAN5G(226, 0), CHAN5G(228, 0),
};

static struct ieee80211_supported_band __wl_band_2ghz = {
        .band = IEEE80211_BAND_2GHZ,
        .channels = __wl_2ghz_channels,
        .n_channels = ARRAY_SIZE(__wl_2ghz_channels),
        .bitrates = wl_g_rates,
        .n_bitrates = wl_g_rates_size,
};

static struct ieee80211_supported_band __wl_band_5ghz_a = {
        .band = IEEE80211_BAND_5GHZ,
        .channels = __wl_5ghz_a_channels,
        .n_channels = ARRAY_SIZE(__wl_5ghz_a_channels),
        .bitrates = wl_a_rates,
        .n_bitrates = wl_a_rates_size,
};

static struct ieee80211_supported_band __wl_band_5ghz_n = {
        .band = IEEE80211_BAND_5GHZ,
        .channels = __wl_5ghz_n_channels,
        .n_channels = ARRAY_SIZE(__wl_5ghz_n_channels),
        .bitrates = wl_a_rates,
        .n_bitrates = wl_a_rates_size,
};

static const u32 __wl_cipher_suites[] = {
        WLAN_CIPHER_SUITE_WEP40,
        WLAN_CIPHER_SUITE_WEP104,
        WLAN_CIPHER_SUITE_TKIP,
        WLAN_CIPHER_SUITE_CCMP,
        WLAN_CIPHER_SUITE_AES_CMAC,
};

/* tag_ID/length/value_buffer tuple */
struct brcmf_tlv {
        u8 id;
        u8 len;
        u8 data[1];
};

/* Quarter dBm units to mW
 * Table starts at QDBM_OFFSET, so the first entry is mW for qdBm=153
 * Table is offset so the last entry is largest mW value that fits in
 * a u16.
 */

#define QDBM_OFFSET 153         /* Offset for first entry */
#define QDBM_TABLE_LEN 40       /* Table size */

/* Smallest mW value that will round up to the first table entry, QDBM_OFFSET.
 * Value is ( mW(QDBM_OFFSET - 1) + mW(QDBM_OFFSET) ) / 2
 */
#define QDBM_TABLE_LOW_BOUND 6493       /* Low bound */

/* Largest mW value that will round down to the last table entry,
 * QDBM_OFFSET + QDBM_TABLE_LEN-1.
 * Value is ( mW(QDBM_OFFSET + QDBM_TABLE_LEN - 1) +
 * mW(QDBM_OFFSET + QDBM_TABLE_LEN) ) / 2.
 */
#define QDBM_TABLE_HIGH_BOUND 64938     /* High bound */

static const u16 nqdBm_to_mW_map[QDBM_TABLE_LEN] = {
/* qdBm:        +0      +1      +2      +3      +4      +5      +6      +7 */
/* 153: */ 6683, 7079, 7499, 7943, 8414, 8913, 9441, 10000,
/* 161: */ 10593, 11220, 11885, 12589, 13335, 14125, 14962, 15849,
/* 169: */ 16788, 17783, 18836, 19953, 21135, 22387, 23714, 25119,
/* 177: */ 26607, 28184, 29854, 31623, 33497, 35481, 37584, 39811,
/* 185: */ 42170, 44668, 47315, 50119, 53088, 56234, 59566, 63096
};

static u16 brcmf_qdbm_to_mw(u8 qdbm)
{
        uint factor = 1;
        int idx = qdbm - QDBM_OFFSET;

        if (idx >= QDBM_TABLE_LEN)
                /* clamp to max u16 mW value */
                return 0xFFFF;

        /* scale the qdBm index up to the range of the table 0-40
         * where an offset of 40 qdBm equals a factor of 10 mW.
         */
        while (idx < 0) {
                idx += 40;
                factor *= 10;
        }

        /* return the mW value scaled down to the correct factor of 10,
         * adding in factor/2 to get proper rounding.
         */
        return (nqdBm_to_mW_map[idx] + factor / 2) / factor;
}

static u8 brcmf_mw_to_qdbm(u16 mw)
{
        u8 qdbm;
        int offset;
        uint mw_uint = mw;
        uint boundary;

        /* handle boundary case */
        if (mw_uint <= 1)
                return 0;

        offset = QDBM_OFFSET;

        /* move mw into the range of the table */
        while (mw_uint < QDBM_TABLE_LOW_BOUND) {
                mw_uint *= 10;
                offset -= 40;
        }

        for (qdbm = 0; qdbm < QDBM_TABLE_LEN - 1; qdbm++) {
                boundary = nqdBm_to_mW_map[qdbm] + (nqdBm_to_mW_map[qdbm + 1] -
                                                    nqdBm_to_mW_map[qdbm]) / 2;
                if (mw_uint < boundary)
                        break;
        }

        qdbm += (u8) offset;

        return qdbm;
}

/* function for reading/writing a single u32 from/to the dongle */
static int
brcmf_exec_dcmd_u32(struct net_device *ndev, u32 cmd, u32 *par)
{
        int err;
        __le32 par_le = cpu_to_le32(*par);

        err = brcmf_exec_dcmd(ndev, cmd, &par_le, sizeof(__le32));
        *par = le32_to_cpu(par_le);

        return err;
}

static void convert_key_from_CPU(struct brcmf_wsec_key *key,
                                 struct brcmf_wsec_key_le *key_le)
{
        key_le->index = cpu_to_le32(key->index);
        key_le->len = cpu_to_le32(key->len);
        key_le->algo = cpu_to_le32(key->algo);
        key_le->flags = cpu_to_le32(key->flags);
        key_le->rxiv.hi = cpu_to_le32(key->rxiv.hi);
        key_le->rxiv.lo = cpu_to_le16(key->rxiv.lo);
        key_le->iv_initialized = cpu_to_le32(key->iv_initialized);
        memcpy(key_le->data, key->data, sizeof(key->data));
        memcpy(key_le->ea, key->ea, sizeof(key->ea));
}

static int send_key_to_dongle(struct net_device *ndev,
                              struct brcmf_wsec_key *key)
{
        int err;
        struct brcmf_wsec_key_le key_le;

        convert_key_from_CPU(key, &key_le);
        err = brcmf_exec_dcmd(ndev, BRCMF_C_SET_KEY, &key_le, sizeof(key_le));
        if (err)
                WL_ERR("WLC_SET_KEY error (%d)\n", err);
        return err;
}

static s32
brcmf_cfg80211_change_iface(struct wiphy *wiphy, struct net_device *ndev,
                         enum nl80211_iftype type, u32 *flags,
                         struct vif_params *params)
{
        struct brcmf_cfg80211_priv *cfg_priv = wiphy_to_cfg(wiphy);
        struct wireless_dev *wdev;
        s32 infra = 0;
        s32 err = 0;

        WL_TRACE("Enter\n");
        if (!check_sys_up(wiphy))
                return -EIO;

        switch (type) {
        case NL80211_IFTYPE_MONITOR:
        case NL80211_IFTYPE_WDS:
                WL_ERR("type (%d) : currently we do not support this type\n",
                       type);
                return -EOPNOTSUPP;
        case NL80211_IFTYPE_ADHOC:
                cfg_priv->conf->mode = WL_MODE_IBSS;
                infra = 0;
                break;
        case NL80211_IFTYPE_STATION:
                cfg_priv->conf->mode = WL_MODE_BSS;
                infra = 1;
                break;
        default:
                err = -EINVAL;
                goto done;
        }

        err = brcmf_exec_dcmd_u32(ndev, BRCMF_C_SET_INFRA, &infra);
        if (err) {
                WL_ERR("WLC_SET_INFRA error (%d)\n", err);
                err = -EAGAIN;
        } else {
                wdev = ndev->ieee80211_ptr;
                wdev->iftype = type;
        }

        WL_INFO("IF Type = %s\n",
                (cfg_priv->conf->mode == WL_MODE_IBSS) ? "Adhoc" : "Infra");

done:
        WL_TRACE("Exit\n");

        return err;
}

static s32 brcmf_dev_intvar_set(struct net_device *ndev, s8 *name, s32 val)
{
        s8 buf[BRCMF_DCMD_SMLEN];
        u32 len;
        s32 err = 0;
        __le32 val_le;

        val_le = cpu_to_le32(val);
        len = brcmf_c_mkiovar(name, (char *)(&val_le), sizeof(val_le), buf,
                            sizeof(buf));
        BUG_ON(!len);

        err = brcmf_exec_dcmd(ndev, BRCMF_C_SET_VAR, buf, len);
        if (err)
                WL_ERR("error (%d)\n", err);

        return err;
}

static s32
brcmf_dev_intvar_get(struct net_device *ndev, s8 *name, s32 *retval)
{
        union {
                s8 buf[BRCMF_DCMD_SMLEN];
                __le32 val;
        } var;
        u32 len;
        u32 data_null;
        s32 err = 0;

        len =
            brcmf_c_mkiovar(name, (char *)(&data_null), 0, (char *)(&var),
                        sizeof(var.buf));
        BUG_ON(!len);
        err = brcmf_exec_dcmd(ndev, BRCMF_C_GET_VAR, &var, len);
        if (err)
                WL_ERR("error (%d)\n", err);

        *retval = le32_to_cpu(var.val);

        return err;
}

static void brcmf_set_mpc(struct net_device *ndev, int mpc)
{
        s32 err = 0;
        struct brcmf_cfg80211_priv *cfg_priv = ndev_to_cfg(ndev);

        if (test_bit(WL_STATUS_READY, &cfg_priv->status)) {
                err = brcmf_dev_intvar_set(ndev, "mpc", mpc);
                if (err) {
                        WL_ERR("fail to set mpc\n");
                        return;
                }
                WL_INFO("MPC : %d\n", mpc);
        }
}

static void wl_iscan_prep(struct brcmf_scan_params_le *params_le,
                          struct brcmf_ssid *ssid)
{
        memcpy(params_le->bssid, ether_bcast, ETH_ALEN);
        params_le->bss_type = DOT11_BSSTYPE_ANY;
        params_le->scan_type = 0;
        params_le->channel_num = 0;
        params_le->nprobes = cpu_to_le32(-1);
        params_le->active_time = cpu_to_le32(-1);
        params_le->passive_time = cpu_to_le32(-1);
        params_le->home_time = cpu_to_le32(-1);
        if (ssid && ssid->SSID_len)
                memcpy(&params_le->ssid_le, ssid, sizeof(struct brcmf_ssid));
}

static s32
brcmf_dev_iovar_setbuf(struct net_device *ndev, s8 * iovar, void *param,
                    s32 paramlen, void *bufptr, s32 buflen)
{
        s32 iolen;

        iolen = brcmf_c_mkiovar(iovar, param, paramlen, bufptr, buflen);
        BUG_ON(!iolen);

        return brcmf_exec_dcmd(ndev, BRCMF_C_SET_VAR, bufptr, iolen);
}

static s32
brcmf_dev_iovar_getbuf(struct net_device *ndev, s8 * iovar, void *param,
                    s32 paramlen, void *bufptr, s32 buflen)
{
        s32 iolen;

        iolen = brcmf_c_mkiovar(iovar, param, paramlen, bufptr, buflen);
        BUG_ON(!iolen);

        return brcmf_exec_dcmd(ndev, BRCMF_C_GET_VAR, bufptr, buflen);
}

static s32
brcmf_run_iscan(struct brcmf_cfg80211_iscan_ctrl *iscan,
                struct brcmf_ssid *ssid, u16 action)
{
        s32 params_size = BRCMF_SCAN_PARAMS_FIXED_SIZE +
                          offsetof(struct brcmf_iscan_params_le, params_le);
        struct brcmf_iscan_params_le *params;
        s32 err = 0;

        if (ssid && ssid->SSID_len)
                params_size += sizeof(struct brcmf_ssid);
        params = kzalloc(params_size, GFP_KERNEL);
        if (!params)
                return -ENOMEM;
        BUG_ON(params_size >= BRCMF_DCMD_SMLEN);

        wl_iscan_prep(&params->params_le, ssid);

        params->version = cpu_to_le32(BRCMF_ISCAN_REQ_VERSION);
        params->action = cpu_to_le16(action);
        params->scan_duration = cpu_to_le16(0);

        err = brcmf_dev_iovar_setbuf(iscan->ndev, "iscan", params, params_size,
                                     iscan->dcmd_buf, BRCMF_DCMD_SMLEN);
        if (err) {
                if (err == -EBUSY)
                        WL_INFO("system busy : iscan canceled\n");
                else
                        WL_ERR("error (%d)\n", err);
        }

        kfree(params);
        return err;
}

static s32 brcmf_do_iscan(struct brcmf_cfg80211_priv *cfg_priv)
{
        struct brcmf_cfg80211_iscan_ctrl *iscan = cfg_to_iscan(cfg_priv);
        struct net_device *ndev = cfg_to_ndev(cfg_priv);
        struct brcmf_ssid ssid;
        __le32 passive_scan;
        s32 err = 0;

        /* Broadcast scan by default */
        memset(&ssid, 0, sizeof(ssid));

        iscan->state = WL_ISCAN_STATE_SCANING;

        passive_scan = cfg_priv->active_scan ? 0 : cpu_to_le32(1);
        err = brcmf_exec_dcmd(cfg_to_ndev(cfg_priv), BRCMF_C_SET_PASSIVE_SCAN,
                        &passive_scan, sizeof(passive_scan));
        if (err) {
                WL_ERR("error (%d)\n", err);
                return err;
        }
        brcmf_set_mpc(ndev, 0);
        cfg_priv->iscan_kickstart = true;
        err = brcmf_run_iscan(iscan, &ssid, BRCMF_SCAN_ACTION_START);
        if (err) {
                brcmf_set_mpc(ndev, 1);
                cfg_priv->iscan_kickstart = false;
                return err;
        }
        mod_timer(&iscan->timer, jiffies + iscan->timer_ms * HZ / 1000);
        iscan->timer_on = 1;
        return err;
}

static s32
__brcmf_cfg80211_scan(struct wiphy *wiphy, struct net_device *ndev,
                   struct cfg80211_scan_request *request,
                   struct cfg80211_ssid *this_ssid)
{
        struct brcmf_cfg80211_priv *cfg_priv = ndev_to_cfg(ndev);
        struct cfg80211_ssid *ssids;
        struct brcmf_cfg80211_scan_req *sr = cfg_priv->scan_req_int;
        __le32 passive_scan;
        bool iscan_req;
        bool spec_scan;
        s32 err = 0;
        u32 SSID_len;

        if (test_bit(WL_STATUS_SCANNING, &cfg_priv->status)) {
                WL_ERR("Scanning already : status (%lu)\n", cfg_priv->status);
                return -EAGAIN;
        }
        if (test_bit(WL_STATUS_SCAN_ABORTING, &cfg_priv->status)) {
                WL_ERR("Scanning being aborted : status (%lu)\n",
                       cfg_priv->status);
                return -EAGAIN;
        }
        if (test_bit(WL_STATUS_CONNECTING, &cfg_priv->status)) {
                WL_ERR("Connecting : status (%lu)\n",
                       cfg_priv->status);
                return -EAGAIN;
        }

        iscan_req = false;
        spec_scan = false;
        if (request) {
                /* scan bss */
                ssids = request->ssids;
                if (cfg_priv->iscan_on && (!ssids || !ssids->ssid_len))
                        iscan_req = true;
        } else {
                /* scan in ibss */
                /* we don't do iscan in ibss */
                ssids = this_ssid;
        }

        cfg_priv->scan_request = request;
        set_bit(WL_STATUS_SCANNING, &cfg_priv->status);
        if (iscan_req) {
                err = brcmf_do_iscan(cfg_priv);
                if (!err)
                        return err;
                else
                        goto scan_out;
        } else {
                WL_SCAN("ssid \"%s\", ssid_len (%d)\n",
                       ssids->ssid, ssids->ssid_len);
                memset(&sr->ssid_le, 0, sizeof(sr->ssid_le));
                SSID_len = min_t(u8, sizeof(sr->ssid_le.SSID), ssids->ssid_len);
                sr->ssid_le.SSID_len = cpu_to_le32(0);
                if (SSID_len) {
                        memcpy(sr->ssid_le.SSID, ssids->ssid, SSID_len);
                        sr->ssid_le.SSID_len = cpu_to_le32(SSID_len);
                        spec_scan = true;
                } else {
                        WL_SCAN("Broadcast scan\n");
                }

                passive_scan = cfg_priv->active_scan ? 0 : cpu_to_le32(1);
                err = brcmf_exec_dcmd(ndev, BRCMF_C_SET_PASSIVE_SCAN,
                                &passive_scan, sizeof(passive_scan));
                if (err) {
                        WL_ERR("WLC_SET_PASSIVE_SCAN error (%d)\n", err);
                        goto scan_out;
                }
                brcmf_set_mpc(ndev, 0);
                err = brcmf_exec_dcmd(ndev, BRCMF_C_SCAN, &sr->ssid_le,
                                      sizeof(sr->ssid_le));
                if (err) {
                        if (err == -EBUSY)
                                WL_INFO("system busy : scan for \"%s\" "
                                        "canceled\n", sr->ssid_le.SSID);
                        else
                                WL_ERR("WLC_SCAN error (%d)\n", err);

                        brcmf_set_mpc(ndev, 1);
                        goto scan_out;
                }
        }

        return 0;

scan_out:
        clear_bit(WL_STATUS_SCANNING, &cfg_priv->status);
        cfg_priv->scan_request = NULL;
        return err;
}

static s32
brcmf_cfg80211_scan(struct wiphy *wiphy, struct net_device *ndev,
                 struct cfg80211_scan_request *request)
{
        s32 err = 0;

        WL_TRACE("Enter\n");

        if (!check_sys_up(wiphy))
                return -EIO;

        err = __brcmf_cfg80211_scan(wiphy, ndev, request, NULL);
        if (err)
                WL_ERR("scan error (%d)\n", err);

        WL_TRACE("Exit\n");
        return err;
}

static s32 brcmf_set_rts(struct net_device *ndev, u32 rts_threshold)
{
        s32 err = 0;

        err = brcmf_dev_intvar_set(ndev, "rtsthresh", rts_threshold);
        if (err)
                WL_ERR("Error (%d)\n", err);

        return err;
}

static s32 brcmf_set_frag(struct net_device *ndev, u32 frag_threshold)
{
        s32 err = 0;

        err = brcmf_dev_intvar_set(ndev, "fragthresh", frag_threshold);
        if (err)
                WL_ERR("Error (%d)\n", err);

        return err;
}

static s32 brcmf_set_retry(struct net_device *ndev, u32 retry, bool l)
{
        s32 err = 0;
        u32 cmd = (l ? BRCM_SET_LRL : BRCM_SET_SRL);

        err = brcmf_exec_dcmd_u32(ndev, cmd, &retry);
        if (err) {
                WL_ERR("cmd (%d) , error (%d)\n", cmd, err);
                return err;
        }
        return err;
}

static s32 brcmf_cfg80211_set_wiphy_params(struct wiphy *wiphy, u32 changed)
{
        struct brcmf_cfg80211_priv *cfg_priv = wiphy_to_cfg(wiphy);
        struct net_device *ndev = cfg_to_ndev(cfg_priv);
        s32 err = 0;

        WL_TRACE("Enter\n");
        if (!check_sys_up(wiphy))
                return -EIO;

        if (changed & WIPHY_PARAM_RTS_THRESHOLD &&
            (cfg_priv->conf->rts_threshold != wiphy->rts_threshold)) {
                cfg_priv->conf->rts_threshold = wiphy->rts_threshold;
                err = brcmf_set_rts(ndev, cfg_priv->conf->rts_threshold);
                if (!err)
                        goto done;
        }
        if (changed & WIPHY_PARAM_FRAG_THRESHOLD &&
            (cfg_priv->conf->frag_threshold != wiphy->frag_threshold)) {
                cfg_priv->conf->frag_threshold = wiphy->frag_threshold;
                err = brcmf_set_frag(ndev, cfg_priv->conf->frag_threshold);
                if (!err)
                        goto done;
        }
        if (changed & WIPHY_PARAM_RETRY_LONG
            && (cfg_priv->conf->retry_long != wiphy->retry_long)) {
                cfg_priv->conf->retry_long = wiphy->retry_long;
                err = brcmf_set_retry(ndev, cfg_priv->conf->retry_long, true);
                if (!err)
                        goto done;
        }
        if (changed & WIPHY_PARAM_RETRY_SHORT
            && (cfg_priv->conf->retry_short != wiphy->retry_short)) {
                cfg_priv->conf->retry_short = wiphy->retry_short;
                err = brcmf_set_retry(ndev, cfg_priv->conf->retry_short, false);
                if (!err)
                        goto done;
        }

done:
        WL_TRACE("Exit\n");
        return err;
}

static void *brcmf_read_prof(struct brcmf_cfg80211_priv *cfg_priv, s32 item)
{
        switch (item) {
        case WL_PROF_SEC:
                return &cfg_priv->profile->sec;
        case WL_PROF_BSSID:
                return &cfg_priv->profile->bssid;
        case WL_PROF_SSID:
                return &cfg_priv->profile->ssid;
        }
        WL_ERR("invalid item (%d)\n", item);
        return NULL;
}

static s32
brcmf_update_prof(struct brcmf_cfg80211_priv *cfg_priv,
                  const struct brcmf_event_msg *e, void *data, s32 item)
{
        s32 err = 0;
        struct brcmf_ssid *ssid;

        switch (item) {
        case WL_PROF_SSID:
                ssid = (struct brcmf_ssid *) data;
                memset(cfg_priv->profile->ssid.SSID, 0,
                       sizeof(cfg_priv->profile->ssid.SSID));
                memcpy(cfg_priv->profile->ssid.SSID,
                       ssid->SSID, ssid->SSID_len);
                cfg_priv->profile->ssid.SSID_len = ssid->SSID_len;
                break;
        case WL_PROF_BSSID:
                if (data)
                        memcpy(cfg_priv->profile->bssid, data, ETH_ALEN);
                else
                        memset(cfg_priv->profile->bssid, 0, ETH_ALEN);
                break;
        case WL_PROF_SEC:
                memcpy(&cfg_priv->profile->sec, data,
                       sizeof(cfg_priv->profile->sec));
                break;
        case WL_PROF_BEACONINT:
                cfg_priv->profile->beacon_interval = *(u16 *)data;
                break;
        case WL_PROF_DTIMPERIOD:
                cfg_priv->profile->dtim_period = *(u8 *)data;
                break;
        default:
                WL_ERR("unsupported item (%d)\n", item);
                err = -EOPNOTSUPP;
                break;
        }

        return err;
}

static void brcmf_init_prof(struct brcmf_cfg80211_profile *prof)
{
        memset(prof, 0, sizeof(*prof));
}

static void brcmf_ch_to_chanspec(int ch, struct brcmf_join_params *join_params,
        size_t *join_params_size)
{
        u16 chanspec = 0;

        if (ch != 0) {
                if (ch <= CH_MAX_2G_CHANNEL)
                        chanspec |= WL_CHANSPEC_BAND_2G;
                else
                        chanspec |= WL_CHANSPEC_BAND_5G;

                chanspec |= WL_CHANSPEC_BW_20;
                chanspec |= WL_CHANSPEC_CTL_SB_NONE;

                *join_params_size += BRCMF_ASSOC_PARAMS_FIXED_SIZE +
                                     sizeof(u16);

                chanspec |= (ch & WL_CHANSPEC_CHAN_MASK);
                join_params->params_le.chanspec_list[0] = cpu_to_le16(chanspec);
                join_params->params_le.chanspec_num = cpu_to_le32(1);

                WL_CONN("join_params->params.chanspec_list[0]= %#X,"
                        "channel %d, chanspec %#X\n",
                        chanspec, ch, chanspec);
        }
}

static void brcmf_link_down(struct brcmf_cfg80211_priv *cfg_priv)
{
        struct net_device *ndev = NULL;
        s32 err = 0;

        WL_TRACE("Enter\n");

        if (cfg_priv->link_up) {
                ndev = cfg_to_ndev(cfg_priv);
                WL_INFO("Call WLC_DISASSOC to stop excess roaming\n ");
                err = brcmf_exec_dcmd(ndev, BRCMF_C_DISASSOC, NULL, 0);
                if (err)
                        WL_ERR("WLC_DISASSOC failed (%d)\n", err);
                cfg_priv->link_up = false;
        }
        WL_TRACE("Exit\n");
}

static s32
brcmf_cfg80211_join_ibss(struct wiphy *wiphy, struct net_device *ndev,
                      struct cfg80211_ibss_params *params)
{
        struct brcmf_cfg80211_priv *cfg_priv = wiphy_to_cfg(wiphy);
        struct brcmf_join_params join_params;
        size_t join_params_size = 0;
        s32 err = 0;
        s32 wsec = 0;
        s32 bcnprd;
        struct brcmf_ssid ssid;

        WL_TRACE("Enter\n");
        if (!check_sys_up(wiphy))
                return -EIO;

        if (params->ssid)
                WL_CONN("SSID: %s\n", params->ssid);
        else {
                WL_CONN("SSID: NULL, Not supported\n");
                return -EOPNOTSUPP;
        }

        set_bit(WL_STATUS_CONNECTING, &cfg_priv->status);

        if (params->bssid)
                WL_CONN("BSSID: %02X %02X %02X %02X %02X %02X\n",
                params->bssid[0], params->bssid[1], params->bssid[2],
                params->bssid[3], params->bssid[4], params->bssid[5]);
        else
                WL_CONN("No BSSID specified\n");

        if (params->channel)
                WL_CONN("channel: %d\n", params->channel->center_freq);
        else
                WL_CONN("no channel specified\n");

        if (params->channel_fixed)
                WL_CONN("fixed channel required\n");
        else
                WL_CONN("no fixed channel required\n");

        if (params->ie && params->ie_len)
                WL_CONN("ie len: %d\n", params->ie_len);
        else
                WL_CONN("no ie specified\n");

        if (params->beacon_interval)
                WL_CONN("beacon interval: %d\n", params->beacon_interval);
        else
                WL_CONN("no beacon interval specified\n");

        if (params->basic_rates)
                WL_CONN("basic rates: %08X\n", params->basic_rates);
        else
                WL_CONN("no basic rates specified\n");

        if (params->privacy)
                WL_CONN("privacy required\n");
        else
                WL_CONN("no privacy required\n");

        /* Configure Privacy for starter */
        if (params->privacy)
                wsec |= WEP_ENABLED;

        err = brcmf_dev_intvar_set(ndev, "wsec", wsec);
        if (err) {
                WL_ERR("wsec failed (%d)\n", err);
                goto done;
        }

        /* Configure Beacon Interval for starter */
        if (params->beacon_interval)
                bcnprd = params->beacon_interval;
        else
                bcnprd = 100;

        err = brcmf_exec_dcmd_u32(ndev, BRCM_SET_BCNPRD, &bcnprd);
        if (err) {
                WL_ERR("WLC_SET_BCNPRD failed (%d)\n", err);
                goto done;
        }

        /* Configure required join parameter */
        memset(&join_params, 0, sizeof(struct brcmf_join_params));

        /* SSID */
        ssid.SSID_len = min_t(u32, params->ssid_len, 32);
        memcpy(ssid.SSID, params->ssid, ssid.SSID_len);
        memcpy(join_params.ssid_le.SSID, params->ssid, ssid.SSID_len);
        join_params.ssid_le.SSID_len = cpu_to_le32(ssid.SSID_len);
        join_params_size = sizeof(join_params.ssid_le);
        brcmf_update_prof(cfg_priv, NULL, &ssid, WL_PROF_SSID);

        /* BSSID */
        if (params->bssid) {
                memcpy(join_params.params_le.bssid, params->bssid, ETH_ALEN);
                join_params_size = sizeof(join_params.ssid_le) +
                                   BRCMF_ASSOC_PARAMS_FIXED_SIZE;
        } else {
                memcpy(join_params.params_le.bssid, ether_bcast, ETH_ALEN);
        }

        brcmf_update_prof(cfg_priv, NULL,
                          &join_params.params_le.bssid, WL_PROF_BSSID);

        /* Channel */
        if (params->channel) {
                u32 target_channel;

                cfg_priv->channel =
                        ieee80211_frequency_to_channel(
                                params->channel->center_freq);
                if (params->channel_fixed) {
                        /* adding chanspec */
                        brcmf_ch_to_chanspec(cfg_priv->channel,
                                &join_params, &join_params_size);
                }

                /* set channel for starter */
                target_channel = cfg_priv->channel;
                err = brcmf_exec_dcmd_u32(ndev, BRCM_SET_CHANNEL,
                                          &target_channel);
                if (err) {
                        WL_ERR("WLC_SET_CHANNEL failed (%d)\n", err);
                        goto done;
                }
        } else
                cfg_priv->channel = 0;

        cfg_priv->ibss_starter = false;


        err = brcmf_exec_dcmd(ndev, BRCMF_C_SET_SSID,
                           &join_params, join_params_size);
        if (err) {
                WL_ERR("WLC_SET_SSID failed (%d)\n", err);
                goto done;
        }

done:
        if (err)
                clear_bit(WL_STATUS_CONNECTING, &cfg_priv->status);
        WL_TRACE("Exit\n");
        return err;
}

static s32
brcmf_cfg80211_leave_ibss(struct wiphy *wiphy, struct net_device *ndev)
{
        struct brcmf_cfg80211_priv *cfg_priv = wiphy_to_cfg(wiphy);
        s32 err = 0;

        WL_TRACE("Enter\n");
        if (!check_sys_up(wiphy))
                return -EIO;

        brcmf_link_down(cfg_priv);

        WL_TRACE("Exit\n");

        return err;
}

static s32 brcmf_set_wpa_version(struct net_device *ndev,
                                 struct cfg80211_connect_params *sme)
{
        struct brcmf_cfg80211_priv *cfg_priv = ndev_to_cfg(ndev);
        struct brcmf_cfg80211_security *sec;
        s32 val = 0;
        s32 err = 0;

        if (sme->crypto.wpa_versions & NL80211_WPA_VERSION_1)
                val = WPA_AUTH_PSK | WPA_AUTH_UNSPECIFIED;
        else if (sme->crypto.wpa_versions & NL80211_WPA_VERSION_2)
                val = WPA2_AUTH_PSK | WPA2_AUTH_UNSPECIFIED;
        else
                val = WPA_AUTH_DISABLED;
        WL_CONN("setting wpa_auth to 0x%0x\n", val);
        err = brcmf_dev_intvar_set(ndev, "wpa_auth", val);
        if (err) {
                WL_ERR("set wpa_auth failed (%d)\n", err);
                return err;
        }
        sec = brcmf_read_prof(cfg_priv, WL_PROF_SEC);
        sec->wpa_versions = sme->crypto.wpa_versions;
        return err;
}

static s32 brcmf_set_auth_type(struct net_device *ndev,
                               struct cfg80211_connect_params *sme)
{
        struct brcmf_cfg80211_priv *cfg_priv = ndev_to_cfg(ndev);
        struct brcmf_cfg80211_security *sec;
        s32 val = 0;
        s32 err = 0;

        switch (sme->auth_type) {
        case NL80211_AUTHTYPE_OPEN_SYSTEM:
                val = 0;
                WL_CONN("open system\n");
                break;
        case NL80211_AUTHTYPE_SHARED_KEY:
                val = 1;
                WL_CONN("shared key\n");
                break;
        case NL80211_AUTHTYPE_AUTOMATIC:
                val = 2;
                WL_CONN("automatic\n");
                break;
        case NL80211_AUTHTYPE_NETWORK_EAP:
                WL_CONN("network eap\n");
        default:
                val = 2;
                WL_ERR("invalid auth type (%d)\n", sme->auth_type);
                break;
        }

        err = brcmf_dev_intvar_set(ndev, "auth", val);
        if (err) {
                WL_ERR("set auth failed (%d)\n", err);
                return err;
        }
        sec = brcmf_read_prof(cfg_priv, WL_PROF_SEC);
        sec->auth_type = sme->auth_type;
        return err;
}

static s32
brcmf_set_set_cipher(struct net_device *ndev,
                     struct cfg80211_connect_params *sme)
{
        struct brcmf_cfg80211_priv *cfg_priv = ndev_to_cfg(ndev);
        struct brcmf_cfg80211_security *sec;
        s32 pval = 0;
        s32 gval = 0;
        s32 err = 0;

        if (sme->crypto.n_ciphers_pairwise) {
                switch (sme->crypto.ciphers_pairwise[0]) {
                case WLAN_CIPHER_SUITE_WEP40:
                case WLAN_CIPHER_SUITE_WEP104:
                        pval = WEP_ENABLED;
                        break;
                case WLAN_CIPHER_SUITE_TKIP:
                        pval = TKIP_ENABLED;
                        break;
                case WLAN_CIPHER_SUITE_CCMP:
                        pval = AES_ENABLED;
                        break;
                case WLAN_CIPHER_SUITE_AES_CMAC:
                        pval = AES_ENABLED;
                        break;
                default:
                        WL_ERR("invalid cipher pairwise (%d)\n",
                               sme->crypto.ciphers_pairwise[0]);
                        return -EINVAL;
                }
        }
        if (sme->crypto.cipher_group) {
                switch (sme->crypto.cipher_group) {
                case WLAN_CIPHER_SUITE_WEP40:
                case WLAN_CIPHER_SUITE_WEP104:
                        gval = WEP_ENABLED;
                        break;
                case WLAN_CIPHER_SUITE_TKIP:
                        gval = TKIP_ENABLED;
                        break;
                case WLAN_CIPHER_SUITE_CCMP:
                        gval = AES_ENABLED;
                        break;
                case WLAN_CIPHER_SUITE_AES_CMAC:
                        gval = AES_ENABLED;
                        break;
                default:
                        WL_ERR("invalid cipher group (%d)\n",
                               sme->crypto.cipher_group);
                        return -EINVAL;
                }
        }

        WL_CONN("pval (%d) gval (%d)\n", pval, gval);
        err = brcmf_dev_intvar_set(ndev, "wsec", pval | gval);
        if (err) {
                WL_ERR("error (%d)\n", err);
                return err;
        }

        sec = brcmf_read_prof(cfg_priv, WL_PROF_SEC);
        sec->cipher_pairwise = sme->crypto.ciphers_pairwise[0];
        sec->cipher_group = sme->crypto.cipher_group;

        return err;
}

static s32
brcmf_set_key_mgmt(struct net_device *ndev, struct cfg80211_connect_params *sme)
{
        struct brcmf_cfg80211_priv *cfg_priv = ndev_to_cfg(ndev);
        struct brcmf_cfg80211_security *sec;
        s32 val = 0;
        s32 err = 0;

        if (sme->crypto.n_akm_suites) {
                err = brcmf_dev_intvar_get(ndev, "wpa_auth", &val);
                if (err) {
                        WL_ERR("could not get wpa_auth (%d)\n", err);
                        return err;
                }
                if (val & (WPA_AUTH_PSK | WPA_AUTH_UNSPECIFIED)) {
                        switch (sme->crypto.akm_suites[0]) {
                        case WLAN_AKM_SUITE_8021X:
                                val = WPA_AUTH_UNSPECIFIED;
                                break;
                        case WLAN_AKM_SUITE_PSK:
                                val = WPA_AUTH_PSK;
                                break;
                        default:
                                WL_ERR("invalid cipher group (%d)\n",
                                       sme->crypto.cipher_group);
                                return -EINVAL;
                        }
                } else if (val & (WPA2_AUTH_PSK | WPA2_AUTH_UNSPECIFIED)) {
                        switch (sme->crypto.akm_suites[0]) {
                        case WLAN_AKM_SUITE_8021X:
                                val = WPA2_AUTH_UNSPECIFIED;
                                break;
                        case WLAN_AKM_SUITE_PSK:
                                val = WPA2_AUTH_PSK;
                                break;
                        default:
                                WL_ERR("invalid cipher group (%d)\n",
                                       sme->crypto.cipher_group);
                                return -EINVAL;
                        }
                }

                WL_CONN("setting wpa_auth to %d\n", val);
                err = brcmf_dev_intvar_set(ndev, "wpa_auth", val);
                if (err) {
                        WL_ERR("could not set wpa_auth (%d)\n", err);
                        return err;
                }
        }
        sec = brcmf_read_prof(cfg_priv, WL_PROF_SEC);
        sec->wpa_auth = sme->crypto.akm_suites[0];

        return err;
}

static s32
brcmf_set_wep_sharedkey(struct net_device *ndev,
                     struct cfg80211_connect_params *sme)
{
        struct brcmf_cfg80211_priv *cfg_priv = ndev_to_cfg(ndev);
        struct brcmf_cfg80211_security *sec;
        struct brcmf_wsec_key key;
        s32 val;
        s32 err = 0;

        WL_CONN("key len (%d)\n", sme->key_len);

        if (sme->key_len == 0)
                return 0;

        sec = brcmf_read_prof(cfg_priv, WL_PROF_SEC);
        WL_CONN("wpa_versions 0x%x cipher_pairwise 0x%x\n",
                sec->wpa_versions, sec->cipher_pairwise);

        if (sec->wpa_versions & (NL80211_WPA_VERSION_1 | NL80211_WPA_VERSION_2))
                return 0;

        if (sec->cipher_pairwise &
            (WLAN_CIPHER_SUITE_WEP40 | WLAN_CIPHER_SUITE_WEP104)) {
                memset(&key, 0, sizeof(key));
                key.len = (u32) sme->key_len;
                key.index = (u32) sme->key_idx;
                if (key.len > sizeof(key.data)) {
                        WL_ERR("Too long key length (%u)\n", key.len);
                        return -EINVAL;
                }
                memcpy(key.data, sme->key, key.len);
                key.flags = BRCMF_PRIMARY_KEY;
                switch (sec->cipher_pairwise) {
                case WLAN_CIPHER_SUITE_WEP40:
                        key.algo = CRYPTO_ALGO_WEP1;
                        break;
                case WLAN_CIPHER_SUITE_WEP104:
                        key.algo = CRYPTO_ALGO_WEP128;
                        break;
                default:
                        WL_ERR("Invalid algorithm (%d)\n",
                               sme->crypto.ciphers_pairwise[0]);
                        return -EINVAL;
                }
                /* Set the new key/index */
                WL_CONN("key length (%d) key index (%d) algo (%d)\n",
                        key.len, key.index, key.algo);
                WL_CONN("key \"%s\"\n", key.data);
                err = send_key_to_dongle(ndev, &key);
                if (err)
                        return err;

                if (sec->auth_type == NL80211_AUTHTYPE_OPEN_SYSTEM) {
                        WL_CONN("set auth_type to shared key\n");
                        val = 1;        /* shared key */
                        err = brcmf_dev_intvar_set(ndev, "auth", val);
                        if (err) {
                                WL_ERR("set auth failed (%d)\n", err);
                                return err;
                        }
                }
        }
        return err;
}

static s32
brcmf_cfg80211_connect(struct wiphy *wiphy, struct net_device *ndev,
                    struct cfg80211_connect_params *sme)
{
        struct brcmf_cfg80211_priv *cfg_priv = wiphy_to_cfg(wiphy);
        struct ieee80211_channel *chan = sme->channel;
        struct brcmf_join_params join_params;
        size_t join_params_size;
        struct brcmf_ssid ssid;

        s32 err = 0;

        WL_TRACE("Enter\n");
        if (!check_sys_up(wiphy))
                return -EIO;

        if (!sme->ssid) {
                WL_ERR("Invalid ssid\n");
                return -EOPNOTSUPP;
        }

        set_bit(WL_STATUS_CONNECTING, &cfg_priv->status);

        if (chan) {
                cfg_priv->channel =
                        ieee80211_frequency_to_channel(chan->center_freq);
                WL_CONN("channel (%d), center_req (%d)\n",
                                cfg_priv->channel, chan->center_freq);
        } else
                cfg_priv->channel = 0;

        WL_INFO("ie (%p), ie_len (%zd)\n", sme->ie, sme->ie_len);

        err = brcmf_set_wpa_version(ndev, sme);
        if (err) {
                WL_ERR("wl_set_wpa_version failed (%d)\n", err);
                goto done;
        }

        err = brcmf_set_auth_type(ndev, sme);
        if (err) {
                WL_ERR("wl_set_auth_type failed (%d)\n", err);
                goto done;
        }

        err = brcmf_set_set_cipher(ndev, sme);
        if (err) {
                WL_ERR("wl_set_set_cipher failed (%d)\n", err);
                goto done;
        }

        err = brcmf_set_key_mgmt(ndev, sme);
        if (err) {
                WL_ERR("wl_set_key_mgmt failed (%d)\n", err);
                goto done;
        }

        err = brcmf_set_wep_sharedkey(ndev, sme);
        if (err) {
                WL_ERR("brcmf_set_wep_sharedkey failed (%d)\n", err);
                goto done;
        }

        memset(&join_params, 0, sizeof(join_params));
        join_params_size = sizeof(join_params.ssid_le);

        ssid.SSID_len = min_t(u32, sizeof(ssid.SSID), sme->ssid_len);
        memcpy(&join_params.ssid_le.SSID, sme->ssid, ssid.SSID_len);
        memcpy(&ssid.SSID, sme->ssid, ssid.SSID_len);
        join_params.ssid_le.SSID_len = cpu_to_le32(ssid.SSID_len);
        brcmf_update_prof(cfg_priv, NULL, &ssid, WL_PROF_SSID);

        memcpy(join_params.params_le.bssid, ether_bcast, ETH_ALEN);

        if (ssid.SSID_len < IEEE80211_MAX_SSID_LEN)
                WL_CONN("ssid \"%s\", len (%d)\n",
                       ssid.SSID, ssid.SSID_len);

        brcmf_ch_to_chanspec(cfg_priv->channel,
                             &join_params, &join_params_size);
        err = brcmf_exec_dcmd(ndev, BRCMF_C_SET_SSID,
                           &join_params, join_params_size);
        if (err)
                WL_ERR("WLC_SET_SSID failed (%d)\n", err);

done:
        if (err)
                clear_bit(WL_STATUS_CONNECTING, &cfg_priv->status);
        WL_TRACE("Exit\n");
        return err;
}

static s32
brcmf_cfg80211_disconnect(struct wiphy *wiphy, struct net_device *ndev,
                       u16 reason_code)
{
        struct brcmf_cfg80211_priv *cfg_priv = wiphy_to_cfg(wiphy);
        struct brcmf_scb_val_le scbval;
        s32 err = 0;

        WL_TRACE("Enter. Reason code = %d\n", reason_code);
        if (!check_sys_up(wiphy))
                return -EIO;

        clear_bit(WL_STATUS_CONNECTED, &cfg_priv->status);

        memcpy(&scbval.ea, brcmf_read_prof(cfg_priv, WL_PROF_BSSID), ETH_ALEN);
        scbval.val = cpu_to_le32(reason_code);
        err = brcmf_exec_dcmd(ndev, BRCMF_C_DISASSOC, &scbval,
                              sizeof(struct brcmf_scb_val_le));
        if (err)
                WL_ERR("error (%d)\n", err);

        cfg_priv->link_up = false;

        WL_TRACE("Exit\n");
        return err;
}

static s32
brcmf_cfg80211_set_tx_power(struct wiphy *wiphy,
                         enum nl80211_tx_power_setting type, s32 dbm)
{

        struct brcmf_cfg80211_priv *cfg_priv = wiphy_to_cfg(wiphy);
        struct net_device *ndev = cfg_to_ndev(cfg_priv);
        u16 txpwrmw;
        s32 err = 0;
        s32 disable = 0;

        WL_TRACE("Enter\n");
        if (!check_sys_up(wiphy))
                return -EIO;

        switch (type) {
        case NL80211_TX_POWER_AUTOMATIC:
                break;
        case NL80211_TX_POWER_LIMITED:
                if (dbm < 0) {
                        WL_ERR("TX_POWER_LIMITED - dbm is negative\n");
                        err = -EINVAL;
                        goto done;
                }
                break;
        case NL80211_TX_POWER_FIXED:
                if (dbm < 0) {
                        WL_ERR("TX_POWER_FIXED - dbm is negative\n");
                        err = -EINVAL;
                        goto done;
                }
                break;
        }
        /* Make sure radio is off or on as far as software is concerned */
        disable = WL_RADIO_SW_DISABLE << 16;
        err = brcmf_exec_dcmd_u32(ndev, BRCMF_C_SET_RADIO, &disable);
        if (err)
                WL_ERR("WLC_SET_RADIO error (%d)\n", err);

        if (dbm > 0xffff)
                txpwrmw = 0xffff;
        else
                txpwrmw = (u16) dbm;
        err = brcmf_dev_intvar_set(ndev, "qtxpower",
                        (s32) (brcmf_mw_to_qdbm(txpwrmw)));
        if (err)
                WL_ERR("qtxpower error (%d)\n", err);
        cfg_priv->conf->tx_power = dbm;

done:
        WL_TRACE("Exit\n");
        return err;
}

static s32 brcmf_cfg80211_get_tx_power(struct wiphy *wiphy, s32 *dbm)
{
        struct brcmf_cfg80211_priv *cfg_priv = wiphy_to_cfg(wiphy);
        struct net_device *ndev = cfg_to_ndev(cfg_priv);
        s32 txpwrdbm;
        u8 result;
        s32 err = 0;

        WL_TRACE("Enter\n");
        if (!check_sys_up(wiphy))
                return -EIO;

        err = brcmf_dev_intvar_get(ndev, "qtxpower", &txpwrdbm);
        if (err) {
                WL_ERR("error (%d)\n", err);
                goto done;
        }

        result = (u8) (txpwrdbm & ~WL_TXPWR_OVERRIDE);
        *dbm = (s32) brcmf_qdbm_to_mw(result);

done:
        WL_TRACE("Exit\n");
        return err;
}

static s32
brcmf_cfg80211_config_default_key(struct wiphy *wiphy, struct net_device *ndev,
                               u8 key_idx, bool unicast, bool multicast)
{
        u32 index;
        u32 wsec;
        s32 err = 0;

        WL_TRACE("Enter\n");
        WL_CONN("key index (%d)\n", key_idx);
        if (!check_sys_up(wiphy))
                return -EIO;

        err = brcmf_exec_dcmd_u32(ndev, BRCMF_C_GET_WSEC, &wsec);
        if (err) {
                WL_ERR("WLC_GET_WSEC error (%d)\n", err);
                goto done;
        }

        if (wsec & WEP_ENABLED) {
                /* Just select a new current key */
                index = key_idx;
                err = brcmf_exec_dcmd_u32(ndev, BRCMF_C_SET_KEY_PRIMARY,
                                          &index);
                if (err)
                        WL_ERR("error (%d)\n", err);
        }
done:
        WL_TRACE("Exit\n");
        return err;
}

static s32
brcmf_add_keyext(struct wiphy *wiphy, struct net_device *ndev,
              u8 key_idx, const u8 *mac_addr, struct key_params *params)
{
        struct brcmf_wsec_key key;
        struct brcmf_wsec_key_le key_le;
        s32 err = 0;

        memset(&key, 0, sizeof(key));
        key.index = (u32) key_idx;
        /* Instead of bcast for ea address for default wep keys,
                 driver needs it to be Null */
        if (!is_multicast_ether_addr(mac_addr))
                memcpy((char *)&key.ea, (void *)mac_addr, ETH_ALEN);
        key.len = (u32) params->key_len;
        /* check for key index change */
        if (key.len == 0) {
                /* key delete */
                err = send_key_to_dongle(ndev, &key);
                if (err)
                        return err;
        } else {
                if (key.len > sizeof(key.data)) {
                        WL_ERR("Invalid key length (%d)\n", key.len);
                        return -EINVAL;
                }

                WL_CONN("Setting the key index %d\n", key.index);
                memcpy(key.data, params->key, key.len);

                if (params->cipher == WLAN_CIPHER_SUITE_TKIP) {
                        u8 keybuf[8];
                        memcpy(keybuf, &key.data[24], sizeof(keybuf));
                        memcpy(&key.data[24], &key.data[16], sizeof(keybuf));
                        memcpy(&key.data[16], keybuf, sizeof(keybuf));
                }

                /* if IW_ENCODE_EXT_RX_SEQ_VALID set */
                if (params->seq && params->seq_len == 6) {
                        /* rx iv */
                        u8 *ivptr;
                        ivptr = (u8 *) params->seq;
                        key.rxiv.hi = (ivptr[5] << 24) | (ivptr[4] << 16) |
                            (ivptr[3] << 8) | ivptr[2];
                        key.rxiv.lo = (ivptr[1] << 8) | ivptr[0];
                        key.iv_initialized = true;
                }

                switch (params->cipher) {
                case WLAN_CIPHER_SUITE_WEP40:
                        key.algo = CRYPTO_ALGO_WEP1;
                        WL_CONN("WLAN_CIPHER_SUITE_WEP40\n");
                        break;
                case WLAN_CIPHER_SUITE_WEP104:
                        key.algo = CRYPTO_ALGO_WEP128;
                        WL_CONN("WLAN_CIPHER_SUITE_WEP104\n");
                        break;
                case WLAN_CIPHER_SUITE_TKIP:
                        key.algo = CRYPTO_ALGO_TKIP;
                        WL_CONN("WLAN_CIPHER_SUITE_TKIP\n");
                        break;
                case WLAN_CIPHER_SUITE_AES_CMAC:
                        key.algo = CRYPTO_ALGO_AES_CCM;
                        WL_CONN("WLAN_CIPHER_SUITE_AES_CMAC\n");
                        break;
                case WLAN_CIPHER_SUITE_CCMP:
                        key.algo = CRYPTO_ALGO_AES_CCM;
                        WL_CONN("WLAN_CIPHER_SUITE_CCMP\n");
                        break;
                default:
                        WL_ERR("Invalid cipher (0x%x)\n", params->cipher);
                        return -EINVAL;
                }
                convert_key_from_CPU(&key, &key_le);

                brcmf_netdev_wait_pend8021x(ndev);
                err = brcmf_exec_dcmd(ndev, BRCMF_C_SET_KEY, &key_le,
                                      sizeof(key_le));
                if (err) {
                        WL_ERR("WLC_SET_KEY error (%d)\n", err);
                        return err;
                }
        }
        return err;
}

static s32
brcmf_cfg80211_add_key(struct wiphy *wiphy, struct net_device *ndev,
                    u8 key_idx, bool pairwise, const u8 *mac_addr,
                    struct key_params *params)
{
        struct brcmf_wsec_key key;
        s32 val;
        s32 wsec;
        s32 err = 0;
        u8 keybuf[8];

        WL_TRACE("Enter\n");
        WL_CONN("key index (%d)\n", key_idx);
        if (!check_sys_up(wiphy))
                return -EIO;

        if (mac_addr) {
                WL_TRACE("Exit");
                return brcmf_add_keyext(wiphy, ndev, key_idx, mac_addr, params);
        }
        memset(&key, 0, sizeof(key));

        key.len = (u32) params->key_len;
        key.index = (u32) key_idx;

        if (key.len > sizeof(key.data)) {
                WL_ERR("Too long key length (%u)\n", key.len);
                err = -EINVAL;
                goto done;
        }
        memcpy(key.data, params->key, key.len);

        key.flags = BRCMF_PRIMARY_KEY;
        switch (params->cipher) {
        case WLAN_CIPHER_SUITE_WEP40:
                key.algo = CRYPTO_ALGO_WEP1;
                WL_CONN("WLAN_CIPHER_SUITE_WEP40\n");
                break;
        case WLAN_CIPHER_SUITE_WEP104:
                key.algo = CRYPTO_ALGO_WEP128;
                WL_CONN("WLAN_CIPHER_SUITE_WEP104\n");
                break;
        case WLAN_CIPHER_SUITE_TKIP:
                memcpy(keybuf, &key.data[24], sizeof(keybuf));
                memcpy(&key.data[24], &key.data[16], sizeof(keybuf));
                memcpy(&key.data[16], keybuf, sizeof(keybuf));
                key.algo = CRYPTO_ALGO_TKIP;
                WL_CONN("WLAN_CIPHER_SUITE_TKIP\n");
                break;
        case WLAN_CIPHER_SUITE_AES_CMAC:
                key.algo = CRYPTO_ALGO_AES_CCM;
                WL_CONN("WLAN_CIPHER_SUITE_AES_CMAC\n");
                break;
        case WLAN_CIPHER_SUITE_CCMP:
                key.algo = CRYPTO_ALGO_AES_CCM;
                WL_CONN("WLAN_CIPHER_SUITE_CCMP\n");
                break;
        default:
                WL_ERR("Invalid cipher (0x%x)\n", params->cipher);
                err = -EINVAL;
                goto done;
        }

        err = send_key_to_dongle(ndev, &key); /* Set the new key/index */
        if (err)
                goto done;

        val = WEP_ENABLED;
        err = brcmf_dev_intvar_get(ndev, "wsec", &wsec);
        if (err) {
                WL_ERR("get wsec error (%d)\n", err);
                goto done;
        }
        wsec &= ~(WEP_ENABLED);
        wsec |= val;
        err = brcmf_dev_intvar_set(ndev, "wsec", wsec);
        if (err) {
                WL_ERR("set wsec error (%d)\n", err);
                goto done;
        }

        val = 1;                /* assume shared key. otherwise 0 */
        err = brcmf_exec_dcmd_u32(ndev, BRCMF_C_SET_AUTH, &val);
        if (err)
                WL_ERR("WLC_SET_AUTH error (%d)\n", err);
done:
        WL_TRACE("Exit\n");
        return err;
}

static s32
brcmf_cfg80211_del_key(struct wiphy *wiphy, struct net_device *ndev,
                    u8 key_idx, bool pairwise, const u8 *mac_addr)
{
        struct brcmf_wsec_key key;
        s32 err = 0;
        s32 val;
        s32 wsec;

        WL_TRACE("Enter\n");
        if (!check_sys_up(wiphy))
                return -EIO;

        memset(&key, 0, sizeof(key));

        key.index = (u32) key_idx;
        key.flags = BRCMF_PRIMARY_KEY;
        key.algo = CRYPTO_ALGO_OFF;

        WL_CONN("key index (%d)\n", key_idx);

        /* Set the new key/index */
        err = send_key_to_dongle(ndev, &key);
        if (err) {
                if (err == -EINVAL) {
                        if (key.index >= DOT11_MAX_DEFAULT_KEYS)
                                /* we ignore this key index in this case */
                                WL_ERR("invalid key index (%d)\n", key_idx);
                }
                /* Ignore this error, may happen during DISASSOC */
                err = -EAGAIN;
                goto done;
        }

        val = 0;
        err = brcmf_dev_intvar_get(ndev, "wsec", &wsec);
        if (err) {
                WL_ERR("get wsec error (%d)\n", err);
                /* Ignore this error, may happen during DISASSOC */
                err = -EAGAIN;
                goto done;
        }
        wsec &= ~(WEP_ENABLED);
        wsec |= val;
        err = brcmf_dev_intvar_set(ndev, "wsec", wsec);
        if (err) {
                WL_ERR("set wsec error (%d)\n", err);
                /* Ignore this error, may happen during DISASSOC */
                err = -EAGAIN;
                goto done;
        }

        val = 0;                /* assume open key. otherwise 1 */
        err = brcmf_exec_dcmd_u32(ndev, BRCMF_C_SET_AUTH, &val);
        if (err) {
                WL_ERR("WLC_SET_AUTH error (%d)\n", err);
                /* Ignore this error, may happen during DISASSOC */
                err = -EAGAIN;
        }
done:
        WL_TRACE("Exit\n");
        return err;
}

static s32
brcmf_cfg80211_get_key(struct wiphy *wiphy, struct net_device *ndev,
                    u8 key_idx, bool pairwise, const u8 *mac_addr, void *cookie,
                    void (*callback) (void *cookie, struct key_params * params))
{
        struct key_params params;
        struct brcmf_cfg80211_priv *cfg_priv = wiphy_to_cfg(wiphy);
        struct brcmf_cfg80211_security *sec;
        s32 wsec;
        s32 err = 0;

        WL_TRACE("Enter\n");
        WL_CONN("key index (%d)\n", key_idx);
        if (!check_sys_up(wiphy))
                return -EIO;

        memset(&params, 0, sizeof(params));

        err = brcmf_exec_dcmd_u32(ndev, BRCMF_C_GET_WSEC, &wsec);
        if (err) {
                WL_ERR("WLC_GET_WSEC error (%d)\n", err);
                /* Ignore this error, may happen during DISASSOC */
                err = -EAGAIN;
                goto done;
        }
        switch (wsec) {
        case WEP_ENABLED:
                sec = brcmf_read_prof(cfg_priv, WL_PROF_SEC);
                if (sec->cipher_pairwise & WLAN_CIPHER_SUITE_WEP40) {
                        params.cipher = WLAN_CIPHER_SUITE_WEP40;
                        WL_CONN("WLAN_CIPHER_SUITE_WEP40\n");
                } else if (sec->cipher_pairwise & WLAN_CIPHER_SUITE_WEP104) {
                        params.cipher = WLAN_CIPHER_SUITE_WEP104;
                        WL_CONN("WLAN_CIPHER_SUITE_WEP104\n");
                }
                break;
        case TKIP_ENABLED:
                params.cipher = WLAN_CIPHER_SUITE_TKIP;
                WL_CONN("WLAN_CIPHER_SUITE_TKIP\n");
                break;
        case AES_ENABLED:
                params.cipher = WLAN_CIPHER_SUITE_AES_CMAC;
                WL_CONN("WLAN_CIPHER_SUITE_AES_CMAC\n");
                break;
        default:
                WL_ERR("Invalid algo (0x%x)\n", wsec);
                err = -EINVAL;
                goto done;
        }
        callback(cookie, &params);

done:
        WL_TRACE("Exit\n");
        return err;
}

static s32
brcmf_cfg80211_config_default_mgmt_key(struct wiphy *wiphy,
                                    struct net_device *ndev, u8 key_idx)
{
        WL_INFO("Not supported\n");

        return -EOPNOTSUPP;
}

static s32
brcmf_cfg80211_get_station(struct wiphy *wiphy, struct net_device *ndev,
                        u8 *mac, struct station_info *sinfo)
{
        struct brcmf_cfg80211_priv *cfg_priv = wiphy_to_cfg(wiphy);
        struct brcmf_scb_val_le scb_val;
        int rssi;
        s32 rate;
        s32 err = 0;
        u8 *bssid = brcmf_read_prof(cfg_priv, WL_PROF_BSSID);

        WL_TRACE("Enter\n");
        if (!check_sys_up(wiphy))
                return -EIO;

        if (memcmp(mac, bssid, ETH_ALEN)) {
                WL_ERR("Wrong Mac address cfg_mac-%X:%X:%X:%X:%X:%X"
                        "wl_bssid-%X:%X:%X:%X:%X:%X\n",
                        mac[0], mac[1], mac[2], mac[3], mac[4], mac[5],
                        bssid[0], bssid[1], bssid[2], bssid[3],
                        bssid[4], bssid[5]);
                err = -ENOENT;
                goto done;
        }

        /* Report the current tx rate */
        err = brcmf_exec_dcmd_u32(ndev, BRCMF_C_GET_RATE, &rate);
        if (err) {
                WL_ERR("Could not get rate (%d)\n", err);
        } else {
                sinfo->filled |= STATION_INFO_TX_BITRATE;
                sinfo->txrate.legacy = rate * 5;
                WL_CONN("Rate %d Mbps\n", rate / 2);
        }

        if (test_bit(WL_STATUS_CONNECTED, &cfg_priv->status)) {
                scb_val.val = cpu_to_le32(0);
                err = brcmf_exec_dcmd(ndev, BRCMF_C_GET_RSSI, &scb_val,
                                      sizeof(struct brcmf_scb_val_le));
                if (err)
                        WL_ERR("Could not get rssi (%d)\n", err);

                rssi = le32_to_cpu(scb_val.val);
                sinfo->filled |= STATION_INFO_SIGNAL;
                sinfo->signal = rssi;
                WL_CONN("RSSI %d dBm\n", rssi);
        }

done:
        WL_TRACE("Exit\n");
        return err;
}

static s32
brcmf_cfg80211_set_power_mgmt(struct wiphy *wiphy, struct net_device *ndev,
                           bool enabled, s32 timeout)
{
        s32 pm;
        s32 err = 0;
        struct brcmf_cfg80211_priv *cfg_priv = wiphy_to_cfg(wiphy);

        WL_TRACE("Enter\n");

        /*
         * Powersave enable/disable request is coming from the
         * cfg80211 even before the interface is up. In that
         * scenario, driver will be storing the power save
         * preference in cfg_priv struct to apply this to
         * FW later while initializing the dongle
         */
        cfg_priv->pwr_save = enabled;
        if (!test_bit(WL_STATUS_READY, &cfg_priv->status)) {

                WL_INFO("Device is not ready,"
                        "storing the value in cfg_priv struct\n");
                goto done;
        }

        pm = enabled ? PM_FAST : PM_OFF;
        WL_INFO("power save %s\n", (pm ? "enabled" : "disabled"));

        err = brcmf_exec_dcmd_u32(ndev, BRCMF_C_SET_PM, &pm);
        if (err) {
                if (err == -ENODEV)
                        WL_ERR("net_device is not ready yet\n");
                else
                        WL_ERR("error (%d)\n", err);
        }
done:
        WL_TRACE("Exit\n");
        return err;
}

static s32
brcmf_cfg80211_set_bitrate_mask(struct wiphy *wiphy, struct net_device *ndev,
                             const u8 *addr,
                             const struct cfg80211_bitrate_mask *mask)
{
        struct brcm_rateset_le rateset_le;
        s32 rate;
        s32 val;
        s32 err_bg;
        s32 err_a;
        u32 legacy;
        s32 err = 0;

        WL_TRACE("Enter\n");
        if (!check_sys_up(wiphy))
                return -EIO;

        /* addr param is always NULL. ignore it */
        /* Get current rateset */
        err = brcmf_exec_dcmd(ndev, BRCM_GET_CURR_RATESET, &rateset_le,
                              sizeof(rateset_le));
        if (err) {
                WL_ERR("could not get current rateset (%d)\n", err);
                goto done;
        }

        legacy = ffs(mask->control[IEEE80211_BAND_2GHZ].legacy & 0xFFFF);
        if (!legacy)
                legacy = ffs(mask->control[IEEE80211_BAND_5GHZ].legacy &
                             0xFFFF);

        val = wl_g_rates[legacy - 1].bitrate * 100000;

        if (val < le32_to_cpu(rateset_le.count))
                /* Select rate by rateset index */
                rate = rateset_le.rates[val] & 0x7f;
        else
                /* Specified rate in bps */
                rate = val / 500000;

        WL_CONN("rate %d mbps\n", rate / 2);

        /*
         *
         *      Set rate override,
         *      Since the is a/b/g-blind, both a/bg_rate are enforced.
         */
        err_bg = brcmf_dev_intvar_set(ndev, "bg_rate", rate);
        err_a = brcmf_dev_intvar_set(ndev, "a_rate", rate);
        if (err_bg && err_a) {
                WL_ERR("could not set fixed rate (%d) (%d)\n", err_bg, err_a);
                err = err_bg | err_a;
        }

done:
        WL_TRACE("Exit\n");
        return err;
}

static s32 brcmf_inform_single_bss(struct brcmf_cfg80211_priv *cfg_priv,
                                   struct brcmf_bss_info *bi)

{
        struct wiphy *wiphy = cfg_to_wiphy(cfg_priv);
        struct ieee80211_channel *notify_channel;
        struct cfg80211_bss *bss;
        struct ieee80211_supported_band *band;
        s32 err = 0;
        u16 channel;
        u32 freq;
        u64 notify_timestamp;
        u16 notify_capability;
        u16 notify_interval;
        u8 *notify_ie;
        size_t notify_ielen;
        s32 notify_signal;

        if (le32_to_cpu(bi->length) > WL_BSS_INFO_MAX) {
                WL_ERR("Bss info is larger than buffer. Discarding\n");
                return 0;
        }

        channel = bi->ctl_ch ? bi->ctl_ch :
                                CHSPEC_CHANNEL(le16_to_cpu(bi->chanspec));

        if (channel <= CH_MAX_2G_CHANNEL)
                band = wiphy->bands[IEEE80211_BAND_2GHZ];
        else
                band = wiphy->bands[IEEE80211_BAND_5GHZ];

        freq = ieee80211_channel_to_frequency(channel, band->band);
        notify_channel = ieee80211_get_channel(wiphy, freq);

        notify_timestamp = jiffies_to_msecs(jiffies)*1000; /* uSec */
        notify_capability = le16_to_cpu(bi->capability);
        notify_interval = le16_to_cpu(bi->beacon_period);
        notify_ie = (u8 *)bi + le16_to_cpu(bi->ie_offset);
        notify_ielen = le32_to_cpu(bi->ie_length);
        notify_signal = (s16)le16_to_cpu(bi->RSSI) * 100;

        WL_CONN("bssid: %2.2X:%2.2X:%2.2X:%2.2X:%2.2X:%2.2X\n",
                        bi->BSSID[0], bi->BSSID[1], bi->BSSID[2],
                        bi->BSSID[3], bi->BSSID[4], bi->BSSID[5]);
        WL_CONN("Channel: %d(%d)\n", channel, freq);
        WL_CONN("Capability: %X\n", notify_capability);
        WL_CONN("Beacon interval: %d\n", notify_interval);
        WL_CONN("Signal: %d\n", notify_signal);
        WL_CONN("notify_timestamp: %#018llx\n", notify_timestamp);

        bss = cfg80211_inform_bss(wiphy, notify_channel, (const u8 *)bi->BSSID,
                notify_timestamp, notify_capability, notify_interval, notify_ie,
                notify_ielen, notify_signal, GFP_KERNEL);

        if (!bss) {
                WL_ERR("cfg80211_inform_bss_frame error\n");
                return -EINVAL;
        }

        return err;
}

static s32 brcmf_inform_bss(struct brcmf_cfg80211_priv *cfg_priv)
{
        struct brcmf_scan_results *bss_list;
        struct brcmf_bss_info *bi = NULL;       /* must be initialized */
        s32 err = 0;
        int i;

        bss_list = cfg_priv->bss_list;
        if (bss_list->version != BRCMF_BSS_INFO_VERSION) {
                WL_ERR("Version %d != WL_BSS_INFO_VERSION\n",
                       bss_list->version);
                return -EOPNOTSUPP;
        }
        WL_SCAN("scanned AP count (%d)\n", bss_list->count);
        for (i = 0; i < bss_list->count && i < WL_AP_MAX; i++) {
                bi = next_bss(bss_list, bi);
                err = brcmf_inform_single_bss(cfg_priv, bi);
                if (err)
                        break;
        }
        return err;
}

static s32 wl_inform_ibss(struct brcmf_cfg80211_priv *cfg_priv,
                          struct net_device *ndev, const u8 *bssid)
{
        struct wiphy *wiphy = cfg_to_wiphy(cfg_priv);
        struct ieee80211_channel *notify_channel;
        struct brcmf_bss_info *bi = NULL;
        struct ieee80211_supported_band *band;
        u8 *buf = NULL;
        s32 err = 0;
        u16 channel;
        u32 freq;
        u64 notify_timestamp;
        u16 notify_capability;
        u16 notify_interval;
        u8 *notify_ie;
        size_t notify_ielen;
        s32 notify_signal;

        WL_TRACE("Enter\n");

        buf = kzalloc(WL_BSS_INFO_MAX, GFP_KERNEL);
        if (buf == NULL) {
                err = -ENOMEM;
                goto CleanUp;
        }

        *(__le32 *)buf = cpu_to_le32(WL_BSS_INFO_MAX);

        err = brcmf_exec_dcmd(ndev, BRCMF_C_GET_BSS_INFO, buf, WL_BSS_INFO_MAX);
        if (err) {
                WL_ERR("WLC_GET_BSS_INFO failed: %d\n", err);
                goto CleanUp;
        }

        bi = (struct brcmf_bss_info *)(buf + 4);

        channel = bi->ctl_ch ? bi->ctl_ch :
                                CHSPEC_CHANNEL(le16_to_cpu(bi->chanspec));

        if (channel <= CH_MAX_2G_CHANNEL)
                band = wiphy->bands[IEEE80211_BAND_2GHZ];
        else
                band = wiphy->bands[IEEE80211_BAND_5GHZ];

        freq = ieee80211_channel_to_frequency(channel, band->band);
        notify_channel = ieee80211_get_channel(wiphy, freq);

        notify_timestamp = jiffies_to_msecs(jiffies)*1000; /* uSec */
        notify_capability = le16_to_cpu(bi->capability);
        notify_interval = le16_to_cpu(bi->beacon_period);
        notify_ie = (u8 *)bi + le16_to_cpu(bi->ie_offset);
        notify_ielen = le32_to_cpu(bi->ie_length);
        notify_signal = (s16)le16_to_cpu(bi->RSSI) * 100;

        WL_CONN("channel: %d(%d)\n", channel, freq);
        WL_CONN("capability: %X\n", notify_capability);
        WL_CONN("beacon interval: %d\n", notify_interval);
        WL_CONN("signal: %d\n", notify_signal);
        WL_CONN("notify_timestamp: %#018llx\n", notify_timestamp);

        cfg80211_inform_bss(wiphy, notify_channel, bssid,
                notify_timestamp, notify_capability, notify_interval,
                notify_ie, notify_ielen, notify_signal, GFP_KERNEL);

CleanUp:

        kfree(buf);

        WL_TRACE("Exit\n");

        return err;
}

static bool brcmf_is_ibssmode(struct brcmf_cfg80211_priv *cfg_priv)
{
        return cfg_priv->conf->mode == WL_MODE_IBSS;
}

/*
 * Traverse a string of 1-byte tag/1-byte length/variable-length value
 * triples, returning a pointer to the substring whose first element
 * matches tag
 */
static struct brcmf_tlv *brcmf_parse_tlvs(void *buf, int buflen, uint key)
{
        struct brcmf_tlv *elt;
        int totlen;

        elt = (struct brcmf_tlv *) buf;
        totlen = buflen;

        /* find tagged parameter */
        while (totlen >= 2) {
                int len = elt->len;

                /* validate remaining totlen */
                if ((elt->id == key) && (totlen >= (len + 2)))
                        return elt;

                elt = (struct brcmf_tlv *) ((u8 *) elt + (len + 2));
                totlen -= (len + 2);
        }

        return NULL;
}

static s32 brcmf_update_bss_info(struct brcmf_cfg80211_priv *cfg_priv)
{
        struct brcmf_bss_info *bi;
        struct brcmf_ssid *ssid;
        struct brcmf_tlv *tim;
        u16 beacon_interval;
        u8 dtim_period;
        size_t ie_len;
        u8 *ie;
        s32 err = 0;

        WL_TRACE("Enter\n");
        if (brcmf_is_ibssmode(cfg_priv))
                return err;

        ssid = (struct brcmf_ssid *)brcmf_read_prof(cfg_priv, WL_PROF_SSID);

        *(__le32 *)cfg_priv->extra_buf = cpu_to_le32(WL_EXTRA_BUF_MAX);
        err = brcmf_exec_dcmd(cfg_to_ndev(cfg_priv), BRCMF_C_GET_BSS_INFO,
                        cfg_priv->extra_buf, WL_EXTRA_BUF_MAX);
        if (err) {
                WL_ERR("Could not get bss info %d\n", err);
                goto update_bss_info_out;
        }

        bi = (struct brcmf_bss_info *)(cfg_priv->extra_buf + 4);
        err = brcmf_inform_single_bss(cfg_priv, bi);
        if (err)
                goto update_bss_info_out;

        ie = ((u8 *)bi) + le16_to_cpu(bi->ie_offset);
        ie_len = le32_to_cpu(bi->ie_length);
        beacon_interval = le16_to_cpu(bi->beacon_period);

        tim = brcmf_parse_tlvs(ie, ie_len, WLAN_EID_TIM);
        if (tim)
                dtim_period = tim->data[1];
        else {
                /*
                * active scan was done so we could not get dtim
                * information out of probe response.
                * so we speficially query dtim information to dongle.
                */
                u32 var;
                err = brcmf_dev_intvar_get(cfg_to_ndev(cfg_priv),
                                           "dtim_assoc", &var);
                if (err) {
                        WL_ERR("wl dtim_assoc failed (%d)\n", err);
                        goto update_bss_info_out;
                }
                dtim_period = (u8)var;
        }

        brcmf_update_prof(cfg_priv, NULL, &beacon_interval, WL_PROF_BEACONINT);
        brcmf_update_prof(cfg_priv, NULL, &dtim_period, WL_PROF_DTIMPERIOD);

update_bss_info_out:
        WL_TRACE("Exit");
        return err;
}

static void brcmf_term_iscan(struct brcmf_cfg80211_priv *cfg_priv)
{
        struct brcmf_cfg80211_iscan_ctrl *iscan = cfg_to_iscan(cfg_priv);
        struct brcmf_ssid ssid;

        if (cfg_priv->iscan_on) {
                iscan->state = WL_ISCAN_STATE_IDLE;

                if (iscan->timer_on) {
                        del_timer_sync(&iscan->timer);
                        iscan->timer_on = 0;
                }

                cancel_work_sync(&iscan->work);

                /* Abort iscan running in FW */
                memset(&ssid, 0, sizeof(ssid));
                brcmf_run_iscan(iscan, &ssid, WL_SCAN_ACTION_ABORT);
        }
}

static void brcmf_notify_iscan_complete(struct brcmf_cfg80211_iscan_ctrl *iscan,
                                        bool aborted)
{
        struct brcmf_cfg80211_priv *cfg_priv = iscan_to_cfg(iscan);
        struct net_device *ndev = cfg_to_ndev(cfg_priv);

        if (!test_and_clear_bit(WL_STATUS_SCANNING, &cfg_priv->status)) {
                WL_ERR("Scan complete while device not scanning\n");
                return;
        }
        if (cfg_priv->scan_request) {
                WL_SCAN("ISCAN Completed scan: %s\n",
                                aborted ? "Aborted" : "Done");
                cfg80211_scan_done(cfg_priv->scan_request, aborted);
                brcmf_set_mpc(ndev, 1);
                cfg_priv->scan_request = NULL;
        }
        cfg_priv->iscan_kickstart = false;
}

static s32 brcmf_wakeup_iscan(struct brcmf_cfg80211_iscan_ctrl *iscan)
{
        if (iscan->state != WL_ISCAN_STATE_IDLE) {
                WL_SCAN("wake up iscan\n");
                schedule_work(&iscan->work);
                return 0;
        }

        return -EIO;
}

static s32
brcmf_get_iscan_results(struct brcmf_cfg80211_iscan_ctrl *iscan, u32 *status,
                     struct brcmf_scan_results **bss_list)
{
        struct brcmf_iscan_results list;
        struct brcmf_scan_results *results;
        struct brcmf_scan_results_le *results_le;
        struct brcmf_iscan_results *list_buf;
        s32 err = 0;

        memset(iscan->scan_buf, 0, WL_ISCAN_BUF_MAX);
        list_buf = (struct brcmf_iscan_results *)iscan->scan_buf;
        results = &list_buf->results;
        results_le = &list_buf->results_le;
        results->buflen = BRCMF_ISCAN_RESULTS_FIXED_SIZE;
        results->version = 0;
        results->count = 0;

        memset(&list, 0, sizeof(list));
        list.results_le.buflen = cpu_to_le32(WL_ISCAN_BUF_MAX);
        err = brcmf_dev_iovar_getbuf(iscan->ndev, "iscanresults", &list,
                                     BRCMF_ISCAN_RESULTS_FIXED_SIZE,
                                     iscan->scan_buf, WL_ISCAN_BUF_MAX);
        if (err) {
                WL_ERR("error (%d)\n", err);
                return err;
        }
        results->buflen = le32_to_cpu(results_le->buflen);
        results->version = le32_to_cpu(results_le->version);
        results->count = le32_to_cpu(results_le->count);
        WL_SCAN("results->count = %d\n", results_le->count);
        WL_SCAN("results->buflen = %d\n", results_le->buflen);
        *status = le32_to_cpu(list_buf->status_le);
        WL_SCAN("status = %d\n", *status);
        *bss_list = results;

        return err;
}

static s32 brcmf_iscan_done(struct brcmf_cfg80211_priv *cfg_priv)
{
        struct brcmf_cfg80211_iscan_ctrl *iscan = cfg_priv->iscan;
        s32 err = 0;

        iscan->state = WL_ISCAN_STATE_IDLE;
        brcmf_inform_bss(cfg_priv);
        brcmf_notify_iscan_complete(iscan, false);

        return err;
}

static s32 brcmf_iscan_pending(struct brcmf_cfg80211_priv *cfg_priv)
{
        struct brcmf_cfg80211_iscan_ctrl *iscan = cfg_priv->iscan;
        s32 err = 0;

        /* Reschedule the timer */
        mod_timer(&iscan->timer, jiffies + iscan->timer_ms * HZ / 1000);
        iscan->timer_on = 1;

        return err;
}

static s32 brcmf_iscan_inprogress(struct brcmf_cfg80211_priv *cfg_priv)
{
        struct brcmf_cfg80211_iscan_ctrl *iscan = cfg_priv->iscan;
        s32 err = 0;

        brcmf_inform_bss(cfg_priv);
        brcmf_run_iscan(iscan, NULL, BRCMF_SCAN_ACTION_CONTINUE);
        /* Reschedule the timer */
        mod_timer(&iscan->timer, jiffies + iscan->timer_ms * HZ / 1000);
        iscan->timer_on = 1;

        return err;
}

static s32 brcmf_iscan_aborted(struct brcmf_cfg80211_priv *cfg_priv)
{
        struct brcmf_cfg80211_iscan_ctrl *iscan = cfg_priv->iscan;
        s32 err = 0;

        iscan->state = WL_ISCAN_STATE_IDLE;
        brcmf_notify_iscan_complete(iscan, true);

        return err;
}

static void brcmf_cfg80211_iscan_handler(struct work_struct *work)
{
        struct brcmf_cfg80211_iscan_ctrl *iscan =
                        container_of(work, struct brcmf_cfg80211_iscan_ctrl,
                                     work);
        struct brcmf_cfg80211_priv *cfg_priv = iscan_to_cfg(iscan);
        struct brcmf_cfg80211_iscan_eloop *el = &iscan->el;
        u32 status = BRCMF_SCAN_RESULTS_PARTIAL;

        if (iscan->timer_on) {
                del_timer_sync(&iscan->timer);
                iscan->timer_on = 0;
        }

        if (brcmf_get_iscan_results(iscan, &status, &cfg_priv->bss_list)) {
                status = BRCMF_SCAN_RESULTS_ABORTED;
                WL_ERR("Abort iscan\n");
        }

        el->handler[status](cfg_priv);
}

static void brcmf_iscan_timer(unsigned long data)
{
        struct brcmf_cfg80211_iscan_ctrl *iscan =
                        (struct brcmf_cfg80211_iscan_ctrl *)data;

        if (iscan) {
                iscan->timer_on = 0;
                WL_SCAN("timer expired\n");
                brcmf_wakeup_iscan(iscan);
        }
}

static s32 brcmf_invoke_iscan(struct brcmf_cfg80211_priv *cfg_priv)
{
        struct brcmf_cfg80211_iscan_ctrl *iscan = cfg_to_iscan(cfg_priv);

        if (cfg_priv->iscan_on) {
                iscan->state = WL_ISCAN_STATE_IDLE;
                INIT_WORK(&iscan->work, brcmf_cfg80211_iscan_handler);
        }

        return 0;
}

static void brcmf_init_iscan_eloop(struct brcmf_cfg80211_iscan_eloop *el)
{
        memset(el, 0, sizeof(*el));
        el->handler[BRCMF_SCAN_RESULTS_SUCCESS] = brcmf_iscan_done;
        el->handler[BRCMF_SCAN_RESULTS_PARTIAL] = brcmf_iscan_inprogress;
        el->handler[BRCMF_SCAN_RESULTS_PENDING] = brcmf_iscan_pending;
        el->handler[BRCMF_SCAN_RESULTS_ABORTED] = brcmf_iscan_aborted;
        el->handler[BRCMF_SCAN_RESULTS_NO_MEM] = brcmf_iscan_aborted;
}

static s32 brcmf_init_iscan(struct brcmf_cfg80211_priv *cfg_priv)
{
        struct brcmf_cfg80211_iscan_ctrl *iscan = cfg_to_iscan(cfg_priv);
        int err = 0;

        if (cfg_priv->iscan_on) {
                iscan->ndev = cfg_to_ndev(cfg_priv);
                brcmf_init_iscan_eloop(&iscan->el);
                iscan->timer_ms = WL_ISCAN_TIMER_INTERVAL_MS;
                init_timer(&iscan->timer);
                iscan->timer.data = (unsigned long) iscan;
                iscan->timer.function = brcmf_iscan_timer;
                err = brcmf_invoke_iscan(cfg_priv);
                if (!err)
                        iscan->data = cfg_priv;
        }

        return err;
}

static void brcmf_delay(u32 ms)
{
        if (ms < 1000 / HZ) {
                cond_resched();
                mdelay(ms);
        } else {
                msleep(ms);
        }
}

static s32 brcmf_cfg80211_resume(struct wiphy *wiphy)
{
        struct brcmf_cfg80211_priv *cfg_priv = wiphy_to_cfg(wiphy);

        /*
         * Check for WL_STATUS_READY before any function call which
         * could result is bus access. Don't block the resume for
         * any driver error conditions
         */
        WL_TRACE("Enter\n");

        if (test_bit(WL_STATUS_READY, &cfg_priv->status))
                brcmf_invoke_iscan(wiphy_to_cfg(wiphy));

        WL_TRACE("Exit\n");
        return 0;
}

static s32 brcmf_cfg80211_suspend(struct wiphy *wiphy,
                                  struct cfg80211_wowlan *wow)
{
        struct brcmf_cfg80211_priv *cfg_priv = wiphy_to_cfg(wiphy);
        struct net_device *ndev = cfg_to_ndev(cfg_priv);

        WL_TRACE("Enter\n");

        /*
         * Check for WL_STATUS_READY before any function call which
         * could result is bus access. Don't block the suspend for
         * any driver error conditions
         */

        /*
         * While going to suspend if associated with AP disassociate
         * from AP to save power while system is in suspended state
         */
        if ((test_bit(WL_STATUS_CONNECTED, &cfg_priv->status) ||
             test_bit(WL_STATUS_CONNECTING, &cfg_priv->status)) &&
             test_bit(WL_STATUS_READY, &cfg_priv->status)) {
                WL_INFO("Disassociating from AP"
                        " while entering suspend state\n");
                brcmf_link_down(cfg_priv);

                /*
                 * Make sure WPA_Supplicant receives all the event
                 * generated due to DISASSOC call to the fw to keep
                 * the state fw and WPA_Supplicant state consistent
                 */
                brcmf_delay(500);
        }

        set_bit(WL_STATUS_SCAN_ABORTING, &cfg_priv->status);
        if (test_bit(WL_STATUS_READY, &cfg_priv->status))
                brcmf_term_iscan(cfg_priv);

        if (cfg_priv->scan_request) {
                /* Indidate scan abort to cfg80211 layer */
                WL_INFO("Terminating scan in progress\n");
                cfg80211_scan_done(cfg_priv->scan_request, true);
                cfg_priv->scan_request = NULL;
        }
        clear_bit(WL_STATUS_SCANNING, &cfg_priv->status);
        clear_bit(WL_STATUS_SCAN_ABORTING, &cfg_priv->status);

        /* Turn off watchdog timer */
        if (test_bit(WL_STATUS_READY, &cfg_priv->status)) {
                WL_INFO("Enable MPC\n");
                brcmf_set_mpc(ndev, 1);
        }

        WL_TRACE("Exit\n");

        return 0;
}

static __used s32
brcmf_dev_bufvar_set(struct net_device *ndev, s8 *name, s8 *buf, s32 len)
{
        struct brcmf_cfg80211_priv *cfg_priv = ndev_to_cfg(ndev);
        u32 buflen;

        buflen = brcmf_c_mkiovar(name, buf, len, cfg_priv->dcmd_buf,
                               WL_DCMD_LEN_MAX);
        BUG_ON(!buflen);

        return brcmf_exec_dcmd(ndev, BRCMF_C_SET_VAR, cfg_priv->dcmd_buf,
                               buflen);
}

static s32
brcmf_dev_bufvar_get(struct net_device *ndev, s8 *name, s8 *buf,
                  s32 buf_len)
{
        struct brcmf_cfg80211_priv *cfg_priv = ndev_to_cfg(ndev);
        u32 len;
        s32 err = 0;

        len = brcmf_c_mkiovar(name, NULL, 0, cfg_priv->dcmd_buf,
                            WL_DCMD_LEN_MAX);
        BUG_ON(!len);
        err = brcmf_exec_dcmd(ndev, BRCMF_C_GET_VAR, cfg_priv->dcmd_buf,
                              WL_DCMD_LEN_MAX);
        if (err) {
                WL_ERR("error (%d)\n", err);
                return err;
        }
        memcpy(buf, cfg_priv->dcmd_buf, buf_len);

        return err;
}

static __used s32
brcmf_update_pmklist(struct net_device *ndev,
                     struct brcmf_cfg80211_pmk_list *pmk_list, s32 err)
{
        int i, j;
        int pmkid_len;

        pmkid_len = le32_to_cpu(pmk_list->pmkids.npmkid);

        WL_CONN("No of elements %d\n", pmkid_len);
        for (i = 0; i < pmkid_len; i++) {
                WL_CONN("PMKID[%d]: %pM =\n", i,
                        &pmk_list->pmkids.pmkid[i].BSSID);
                for (j = 0; j < WLAN_PMKID_LEN; j++)
                        WL_CONN("%02x\n", pmk_list->pmkids.pmkid[i].PMKID[j]);
        }

        if (!err)
                brcmf_dev_bufvar_set(ndev, "pmkid_info", (char *)pmk_list,
                                        sizeof(*pmk_list));

        return err;
}

static s32
brcmf_cfg80211_set_pmksa(struct wiphy *wiphy, struct net_device *ndev,
                         struct cfg80211_pmksa *pmksa)
{
        struct brcmf_cfg80211_priv *cfg_priv = wiphy_to_cfg(wiphy);
        struct pmkid_list *pmkids = &cfg_priv->pmk_list->pmkids;
        s32 err = 0;
        int i;
        int pmkid_len;

        WL_TRACE("Enter\n");
        if (!check_sys_up(wiphy))
                return -EIO;

        pmkid_len = le32_to_cpu(pmkids->npmkid);
        for (i = 0; i < pmkid_len; i++)
                if (!memcmp(pmksa->bssid, pmkids->pmkid[i].BSSID, ETH_ALEN))
                        break;
        if (i < WL_NUM_PMKIDS_MAX) {
                memcpy(pmkids->pmkid[i].BSSID, pmksa->bssid, ETH_ALEN);
                memcpy(pmkids->pmkid[i].PMKID, pmksa->pmkid, WLAN_PMKID_LEN);
                if (i == pmkid_len) {
                        pmkid_len++;
                        pmkids->npmkid = cpu_to_le32(pmkid_len);
                }
        } else
                err = -EINVAL;

        WL_CONN("set_pmksa,IW_PMKSA_ADD - PMKID: %pM =\n",
                pmkids->pmkid[pmkid_len].BSSID);
        for (i = 0; i < WLAN_PMKID_LEN; i++)
                WL_CONN("%02x\n", pmkids->pmkid[pmkid_len].PMKID[i]);

        err = brcmf_update_pmklist(ndev, cfg_priv->pmk_list, err);

        WL_TRACE("Exit\n");
        return err;
}

static s32
brcmf_cfg80211_del_pmksa(struct wiphy *wiphy, struct net_device *ndev,
                      struct cfg80211_pmksa *pmksa)
{
        struct brcmf_cfg80211_priv *cfg_priv = wiphy_to_cfg(wiphy);
        struct pmkid_list pmkid;
        s32 err = 0;
        int i, pmkid_len;

        WL_TRACE("Enter\n");
        if (!check_sys_up(wiphy))
                return -EIO;

        memcpy(&pmkid.pmkid[0].BSSID, pmksa->bssid, ETH_ALEN);
        memcpy(&pmkid.pmkid[0].PMKID, pmksa->pmkid, WLAN_PMKID_LEN);

        WL_CONN("del_pmksa,IW_PMKSA_REMOVE - PMKID: %pM =\n",
               &pmkid.pmkid[0].BSSID);
        for (i = 0; i < WLAN_PMKID_LEN; i++)
                WL_CONN("%02x\n", pmkid.pmkid[0].PMKID[i]);

        pmkid_len = le32_to_cpu(cfg_priv->pmk_list->pmkids.npmkid);
        for (i = 0; i < pmkid_len; i++)
                if (!memcmp
                    (pmksa->bssid, &cfg_priv->pmk_list->pmkids.pmkid[i].BSSID,
                     ETH_ALEN))
                        break;

        if ((pmkid_len > 0)
            && (i < pmkid_len)) {
                memset(&cfg_priv->pmk_list->pmkids.pmkid[i], 0,
                       sizeof(struct pmkid));
                for (; i < (pmkid_len - 1); i++) {
                        memcpy(&cfg_priv->pmk_list->pmkids.pmkid[i].BSSID,
                               &cfg_priv->pmk_list->pmkids.pmkid[i + 1].BSSID,
                               ETH_ALEN);
                        memcpy(&cfg_priv->pmk_list->pmkids.pmkid[i].PMKID,
                               &cfg_priv->pmk_list->pmkids.pmkid[i + 1].PMKID,
                               WLAN_PMKID_LEN);
                }
                cfg_priv->pmk_list->pmkids.npmkid = cpu_to_le32(pmkid_len - 1);
        } else
                err = -EINVAL;

        err = brcmf_update_pmklist(ndev, cfg_priv->pmk_list, err);

        WL_TRACE("Exit\n");
        return err;

}

static s32
brcmf_cfg80211_flush_pmksa(struct wiphy *wiphy, struct net_device *ndev)
{
        struct brcmf_cfg80211_priv *cfg_priv = wiphy_to_cfg(wiphy);
        s32 err = 0;

        WL_TRACE("Enter\n");
        if (!check_sys_up(wiphy))
                return -EIO;

        memset(cfg_priv->pmk_list, 0, sizeof(*cfg_priv->pmk_list));
        err = brcmf_update_pmklist(ndev, cfg_priv->pmk_list, err);

        WL_TRACE("Exit\n");
        return err;

}

static struct cfg80211_ops wl_cfg80211_ops = {
        .change_virtual_intf = brcmf_cfg80211_change_iface,
        .scan = brcmf_cfg80211_scan,
        .set_wiphy_params = brcmf_cfg80211_set_wiphy_params,
        .join_ibss = brcmf_cfg80211_join_ibss,
        .leave_ibss = brcmf_cfg80211_leave_ibss,
        .get_station = brcmf_cfg80211_get_station,
        .set_tx_power = brcmf_cfg80211_set_tx_power,
        .get_tx_power = brcmf_cfg80211_get_tx_power,
        .add_key = brcmf_cfg80211_add_key,
        .del_key = brcmf_cfg80211_del_key,
        .get_key = brcmf_cfg80211_get_key,
        .set_default_key = brcmf_cfg80211_config_default_key,
        .set_default_mgmt_key = brcmf_cfg80211_config_default_mgmt_key,
        .set_power_mgmt = brcmf_cfg80211_set_power_mgmt,
        .set_bitrate_mask = brcmf_cfg80211_set_bitrate_mask,
        .connect = brcmf_cfg80211_connect,
        .disconnect = brcmf_cfg80211_disconnect,
        .suspend = brcmf_cfg80211_suspend,
        .resume = brcmf_cfg80211_resume,
        .set_pmksa = brcmf_cfg80211_set_pmksa,
        .del_pmksa = brcmf_cfg80211_del_pmksa,
        .flush_pmksa = brcmf_cfg80211_flush_pmksa
};

static s32 brcmf_mode_to_nl80211_iftype(s32 mode)
{
        s32 err = 0;

        switch (mode) {
        case WL_MODE_BSS:
                return NL80211_IFTYPE_STATION;
        case WL_MODE_IBSS:
                return NL80211_IFTYPE_ADHOC;
        default:
                return NL80211_IFTYPE_UNSPECIFIED;
        }

        return err;
}

static struct wireless_dev *brcmf_alloc_wdev(s32 sizeof_iface,
                                          struct device *ndev)
{
        struct wireless_dev *wdev;
        s32 err = 0;

        wdev = kzalloc(sizeof(*wdev), GFP_KERNEL);
        if (!wdev)
                return ERR_PTR(-ENOMEM);

        wdev->wiphy =
            wiphy_new(&wl_cfg80211_ops,
                      sizeof(struct brcmf_cfg80211_priv) + sizeof_iface);
        if (!wdev->wiphy) {
                WL_ERR("Couldn not allocate wiphy device\n");
                err = -ENOMEM;
                goto wiphy_new_out;
        }
        set_wiphy_dev(wdev->wiphy, ndev);
        wdev->wiphy->max_scan_ssids = WL_NUM_SCAN_MAX;
        wdev->wiphy->max_num_pmkids = WL_NUM_PMKIDS_MAX;
        wdev->wiphy->interface_modes =
            BIT(NL80211_IFTYPE_STATION) | BIT(NL80211_IFTYPE_ADHOC);
        wdev->wiphy->bands[IEEE80211_BAND_2GHZ] = &__wl_band_2ghz;
        wdev->wiphy->bands[IEEE80211_BAND_5GHZ] = &__wl_band_5ghz_a;    /* Set
                                                * it as 11a by default.
                                                * This will be updated with
                                                * 11n phy tables in
                                                * "ifconfig up"
                                                * if phy has 11n capability
                                                */
        wdev->wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
        wdev->wiphy->cipher_suites = __wl_cipher_suites;
        wdev->wiphy->n_cipher_suites = ARRAY_SIZE(__wl_cipher_suites);
        wdev->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;      /* enable power
                                                                 * save mode
                                                                 * by default
                                                                 */
        err = wiphy_register(wdev->wiphy);
        if (err < 0) {
                WL_ERR("Couldn not register wiphy device (%d)\n", err);
                goto wiphy_register_out;
        }
        return wdev;

wiphy_register_out:
        wiphy_free(wdev->wiphy);

wiphy_new_out:
        kfree(wdev);

        return ERR_PTR(err);
}

static void brcmf_free_wdev(struct brcmf_cfg80211_priv *cfg_priv)
{
        struct wireless_dev *wdev = cfg_priv->wdev;

        if (!wdev) {
                WL_ERR("wdev is invalid\n");
                return;
        }
        wiphy_unregister(wdev->wiphy);
        wiphy_free(wdev->wiphy);
        kfree(wdev);
        cfg_priv->wdev = NULL;
}

static bool brcmf_is_linkup(struct brcmf_cfg80211_priv *cfg_priv,
                            const struct brcmf_event_msg *e)
{
        u32 event = be32_to_cpu(e->event_type);
        u32 status = be32_to_cpu(e->status);

        if (event == BRCMF_E_SET_SSID && status == BRCMF_E_STATUS_SUCCESS) {
                WL_CONN("Processing set ssid\n");
                cfg_priv->link_up = true;
                return true;
        }

        return false;
}

static bool brcmf_is_linkdown(struct brcmf_cfg80211_priv *cfg_priv,
                              const struct brcmf_event_msg *e)
{
        u32 event = be32_to_cpu(e->event_type);
        u16 flags = be16_to_cpu(e->flags);

        if (event == BRCMF_E_LINK && (!(flags & BRCMF_EVENT_MSG_LINK))) {
                WL_CONN("Processing link down\n");
                return true;
        }
        return false;
}

static bool brcmf_is_nonetwork(struct brcmf_cfg80211_priv *cfg_priv,
                               const struct brcmf_event_msg *e)
{
        u32 event = be32_to_cpu(e->event_type);
        u32 status = be32_to_cpu(e->status);

        if (event == BRCMF_E_LINK && status == BRCMF_E_STATUS_NO_NETWORKS) {
                WL_CONN("Processing Link %s & no network found\n",
                                be16_to_cpu(e->flags) & BRCMF_EVENT_MSG_LINK ?
                                "up" : "down");
                return true;
        }

        if (event == BRCMF_E_SET_SSID && status != BRCMF_E_STATUS_SUCCESS) {
                WL_CONN("Processing connecting & no network found\n");
                return true;
        }

        return false;
}

static void brcmf_clear_assoc_ies(struct brcmf_cfg80211_priv *cfg_priv)
{
        struct brcmf_cfg80211_connect_info *conn_info = cfg_to_conn(cfg_priv);

        kfree(conn_info->req_ie);
        conn_info->req_ie = NULL;
        conn_info->req_ie_len = 0;
        kfree(conn_info->resp_ie);
        conn_info->resp_ie = NULL;
        conn_info->resp_ie_len = 0;
}

static s32 brcmf_get_assoc_ies(struct brcmf_cfg80211_priv *cfg_priv)
{
        struct net_device *ndev = cfg_to_ndev(cfg_priv);
        struct brcmf_cfg80211_assoc_ielen_le *assoc_info;
        struct brcmf_cfg80211_connect_info *conn_info = cfg_to_conn(cfg_priv);
        u32 req_len;
        u32 resp_len;
        s32 err = 0;

        brcmf_clear_assoc_ies(cfg_priv);

        err = brcmf_dev_bufvar_get(ndev, "assoc_info", cfg_priv->extra_buf,
                                WL_ASSOC_INFO_MAX);
        if (err) {
                WL_ERR("could not get assoc info (%d)\n", err);
                return err;
        }
        assoc_info =
                (struct brcmf_cfg80211_assoc_ielen_le *)cfg_priv->extra_buf;
        req_len = le32_to_cpu(assoc_info->req_len);
        resp_len = le32_to_cpu(assoc_info->resp_len);
        if (req_len) {
                err = brcmf_dev_bufvar_get(ndev, "assoc_req_ies",
                                           cfg_priv->extra_buf,
                                           WL_ASSOC_INFO_MAX);
                if (err) {
                        WL_ERR("could not get assoc req (%d)\n", err);
                        return err;
                }
                conn_info->req_ie_len = req_len;
                conn_info->req_ie =
                    kmemdup(cfg_priv->extra_buf, conn_info->req_ie_len,
                            GFP_KERNEL);
        } else {
                conn_info->req_ie_len = 0;
                conn_info->req_ie = NULL;
        }
        if (resp_len) {
                err = brcmf_dev_bufvar_get(ndev, "assoc_resp_ies",
                                           cfg_priv->extra_buf,
                                           WL_ASSOC_INFO_MAX);
                if (err) {
                        WL_ERR("could not get assoc resp (%d)\n", err);
                        return err;
                }
                conn_info->resp_ie_len = resp_len;
                conn_info->resp_ie =
                    kmemdup(cfg_priv->extra_buf, conn_info->resp_ie_len,
                            GFP_KERNEL);
        } else {
                conn_info->resp_ie_len = 0;
                conn_info->resp_ie = NULL;
        }
        WL_CONN("req len (%d) resp len (%d)\n",
               conn_info->req_ie_len, conn_info->resp_ie_len);

        return err;
}

static s32
brcmf_bss_roaming_done(struct brcmf_cfg80211_priv *cfg_priv,
                       struct net_device *ndev,
                       const struct brcmf_event_msg *e)
{
        struct brcmf_cfg80211_connect_info *conn_info = cfg_to_conn(cfg_priv);
        struct wiphy *wiphy = cfg_to_wiphy(cfg_priv);
        struct brcmf_channel_info_le channel_le;
        struct ieee80211_channel *notify_channel;
        struct ieee80211_supported_band *band;
        u32 freq;
        s32 err = 0;
        u32 target_channel;

        WL_TRACE("Enter\n");

        brcmf_get_assoc_ies(cfg_priv);
        brcmf_update_prof(cfg_priv, NULL, &e->addr, WL_PROF_BSSID);
        brcmf_update_bss_info(cfg_priv);

        brcmf_exec_dcmd(ndev, BRCMF_C_GET_CHANNEL, &channel_le,
                        sizeof(channel_le));

        target_channel = le32_to_cpu(channel_le.target_channel);
        WL_CONN("Roamed to channel %d\n", target_channel);

        if (target_channel <= CH_MAX_2G_CHANNEL)
                band = wiphy->bands[IEEE80211_BAND_2GHZ];
        else
                band = wiphy->bands[IEEE80211_BAND_5GHZ];

        freq = ieee80211_channel_to_frequency(target_channel, band->band);
        notify_channel = ieee80211_get_channel(wiphy, freq);

        cfg80211_roamed(ndev, notify_channel,
                        (u8 *)brcmf_read_prof(cfg_priv, WL_PROF_BSSID),
                        conn_info->req_ie, conn_info->req_ie_len,
                        conn_info->resp_ie, conn_info->resp_ie_len, GFP_KERNEL);
        WL_CONN("Report roaming result\n");

        set_bit(WL_STATUS_CONNECTED, &cfg_priv->status);
        WL_TRACE("Exit\n");
        return err;
}

static s32
brcmf_bss_connect_done(struct brcmf_cfg80211_priv *cfg_priv,
                       struct net_device *ndev, const struct brcmf_event_msg *e,
                       bool completed)
{
        struct brcmf_cfg80211_connect_info *conn_info = cfg_to_conn(cfg_priv);
        s32 err = 0;