/******************************************************************************
 *
 * Copyright(c) 2009-2012  Realtek Corporation.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
 *
 * The full GNU General Public License is included in this distribution in the
 * file called LICENSE.
 *
 * Contact Information:
 * wlanfae <wlanfae@realtek.com>
 * Realtek Corporation, No. 2, Innovation Road II, Hsinchu Science Park,
 * Hsinchu 300, Taiwan.
 *
 * Larry Finger <Larry.Finger@lwfinger.net>
 *
 *****************************************************************************/

#include "wifi.h"
#include "rc.h"
#include "base.h"
#include "efuse.h"
#include "cam.h"
#include "ps.h"
#include "regd.h"

#include <linux/ip.h>
#include <linux/module.h>

/*
 *NOTICE!!!: This file will be very big, we should
 *keep it clear under following roles:
 *
 *This file include following parts, so, if you add new
 *functions into this file, please check which part it
 *should includes. or check if you should add new part
 *for this file:
 *
 *1) mac80211 init functions
 *2) tx information functions
 *3) functions called by core.c
 *4) wq & timer callback functions
 *5) frame process functions
 *6) IOT functions
 *7) sysfs functions
 *8) ...
 */

/*********************************************************
 *
 * mac80211 init functions
 *
 *********************************************************/
static struct ieee80211_channel rtl_channeltable_2g[] = {
        {.center_freq = 2412, .hw_value = 1,},
        {.center_freq = 2417, .hw_value = 2,},
        {.center_freq = 2422, .hw_value = 3,},
        {.center_freq = 2427, .hw_value = 4,},
        {.center_freq = 2432, .hw_value = 5,},
        {.center_freq = 2437, .hw_value = 6,},
        {.center_freq = 2442, .hw_value = 7,},
        {.center_freq = 2447, .hw_value = 8,},
        {.center_freq = 2452, .hw_value = 9,},
        {.center_freq = 2457, .hw_value = 10,},
        {.center_freq = 2462, .hw_value = 11,},
        {.center_freq = 2467, .hw_value = 12,},
        {.center_freq = 2472, .hw_value = 13,},
        {.center_freq = 2484, .hw_value = 14,},
};

static struct ieee80211_channel rtl_channeltable_5g[] = {
        {.center_freq = 5180, .hw_value = 36,},
        {.center_freq = 5200, .hw_value = 40,},
        {.center_freq = 5220, .hw_value = 44,},
        {.center_freq = 5240, .hw_value = 48,},
        {.center_freq = 5260, .hw_value = 52,},
        {.center_freq = 5280, .hw_value = 56,},
        {.center_freq = 5300, .hw_value = 60,},
        {.center_freq = 5320, .hw_value = 64,},
        {.center_freq = 5500, .hw_value = 100,},
        {.center_freq = 5520, .hw_value = 104,},
        {.center_freq = 5540, .hw_value = 108,},
        {.center_freq = 5560, .hw_value = 112,},
        {.center_freq = 5580, .hw_value = 116,},
        {.center_freq = 5600, .hw_value = 120,},
        {.center_freq = 5620, .hw_value = 124,},
        {.center_freq = 5640, .hw_value = 128,},
        {.center_freq = 5660, .hw_value = 132,},
        {.center_freq = 5680, .hw_value = 136,},
        {.center_freq = 5700, .hw_value = 140,},
        {.center_freq = 5745, .hw_value = 149,},
        {.center_freq = 5765, .hw_value = 153,},
        {.center_freq = 5785, .hw_value = 157,},
        {.center_freq = 5805, .hw_value = 161,},
        {.center_freq = 5825, .hw_value = 165,},
};

static struct ieee80211_rate rtl_ratetable_2g[] = {
        {.bitrate = 10, .hw_value = 0x00,},
        {.bitrate = 20, .hw_value = 0x01,},
        {.bitrate = 55, .hw_value = 0x02,},
        {.bitrate = 110, .hw_value = 0x03,},
        {.bitrate = 60, .hw_value = 0x04,},
        {.bitrate = 90, .hw_value = 0x05,},
        {.bitrate = 120, .hw_value = 0x06,},
        {.bitrate = 180, .hw_value = 0x07,},
        {.bitrate = 240, .hw_value = 0x08,},
        {.bitrate = 360, .hw_value = 0x09,},
        {.bitrate = 480, .hw_value = 0x0a,},
        {.bitrate = 540, .hw_value = 0x0b,},
};

static struct ieee80211_rate rtl_ratetable_5g[] = {
        {.bitrate = 60, .hw_value = 0x04,},
        {.bitrate = 90, .hw_value = 0x05,},
        {.bitrate = 120, .hw_value = 0x06,},
        {.bitrate = 180, .hw_value = 0x07,},
        {.bitrate = 240, .hw_value = 0x08,},
        {.bitrate = 360, .hw_value = 0x09,},
        {.bitrate = 480, .hw_value = 0x0a,},
        {.bitrate = 540, .hw_value = 0x0b,},
};

static const struct ieee80211_supported_band rtl_band_2ghz = {
        .band = IEEE80211_BAND_2GHZ,

        .channels = rtl_channeltable_2g,
        .n_channels = ARRAY_SIZE(rtl_channeltable_2g),

        .bitrates = rtl_ratetable_2g,
        .n_bitrates = ARRAY_SIZE(rtl_ratetable_2g),

        .ht_cap = {0},
};

static struct ieee80211_supported_band rtl_band_5ghz = {
        .band = IEEE80211_BAND_5GHZ,

        .channels = rtl_channeltable_5g,
        .n_channels = ARRAY_SIZE(rtl_channeltable_5g),

        .bitrates = rtl_ratetable_5g,
        .n_bitrates = ARRAY_SIZE(rtl_ratetable_5g),

        .ht_cap = {0},
};

static const u8 tid_to_ac[] = {
        2, /* IEEE80211_AC_BE */
        3, /* IEEE80211_AC_BK */
        3, /* IEEE80211_AC_BK */
        2, /* IEEE80211_AC_BE */
        1, /* IEEE80211_AC_VI */
        1, /* IEEE80211_AC_VI */
        0, /* IEEE80211_AC_VO */
        0, /* IEEE80211_AC_VO */
};

u8 rtl_tid_to_ac(u8 tid)
{
        return tid_to_ac[tid];
}

static void _rtl_init_hw_ht_capab(struct ieee80211_hw *hw,
                                  struct ieee80211_sta_ht_cap *ht_cap)
{
        struct rtl_priv *rtlpriv = rtl_priv(hw);
        struct rtl_phy *rtlphy = &(rtlpriv->phy);

        ht_cap->ht_supported = true;
        ht_cap->cap = IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
            IEEE80211_HT_CAP_SGI_40 |
            IEEE80211_HT_CAP_SGI_20 |
            IEEE80211_HT_CAP_DSSSCCK40 | IEEE80211_HT_CAP_MAX_AMSDU;

        if (rtlpriv->rtlhal.disable_amsdu_8k)
                ht_cap->cap &= ~IEEE80211_HT_CAP_MAX_AMSDU;

        /*
         *Maximum length of AMPDU that the STA can receive.
         *Length = 2 ^ (13 + max_ampdu_length_exp) - 1 (octets)
         */
        ht_cap->ampdu_factor = IEEE80211_HT_MAX_AMPDU_64K;

        /*Minimum MPDU start spacing , */
        ht_cap->ampdu_density = IEEE80211_HT_MPDU_DENSITY_16;

        ht_cap->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;

        /*
         *hw->wiphy->bands[IEEE80211_BAND_2GHZ]
         *base on ant_num
         *rx_mask: RX mask
         *if rx_ant =1 rx_mask[0]=0xff;==>MCS0-MCS7
         *if rx_ant =2 rx_mask[1]=0xff;==>MCS8-MCS15
         *if rx_ant >=3 rx_mask[2]=0xff;
         *if BW_40 rx_mask[4]=0x01;
         *highest supported RX rate
         */
        if (get_rf_type(rtlphy) == RF_1T2R || get_rf_type(rtlphy) == RF_2T2R) {

                RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG, "1T2R or 2T2R\n");

                ht_cap->mcs.rx_mask[0] = 0xFF;
                ht_cap->mcs.rx_mask[1] = 0xFF;
                ht_cap->mcs.rx_mask[4] = 0x01;

                ht_cap->mcs.rx_highest = cpu_to_le16(MAX_BIT_RATE_40MHZ_MCS15);
        } else if (get_rf_type(rtlphy) == RF_1T1R) {

                RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG, "1T1R\n");

                ht_cap->mcs.rx_mask[0] = 0xFF;
                ht_cap->mcs.rx_mask[1] = 0x00;
                ht_cap->mcs.rx_mask[4] = 0x01;

                ht_cap->mcs.rx_highest = cpu_to_le16(MAX_BIT_RATE_40MHZ_MCS7);
        }
}

static void _rtl_init_mac80211(struct ieee80211_hw *hw)
{
        struct rtl_priv *rtlpriv = rtl_priv(hw);
        struct rtl_hal *rtlhal = rtl_hal(rtlpriv);
        struct rtl_mac *rtlmac = rtl_mac(rtl_priv(hw));
        struct rtl_efuse *rtlefuse = rtl_efuse(rtl_priv(hw));
        struct ieee80211_supported_band *sband;


        if (rtlhal->macphymode == SINGLEMAC_SINGLEPHY && rtlhal->bandset ==
            BAND_ON_BOTH) {
                /* 1: 2.4 G bands */
                /* <1> use  mac->bands as mem for hw->wiphy->bands */
                sband = &(rtlmac->bands[IEEE80211_BAND_2GHZ]);

                /* <2> set hw->wiphy->bands[IEEE80211_BAND_2GHZ]
                 * to default value(1T1R) */
                memcpy(&(rtlmac->bands[IEEE80211_BAND_2GHZ]), &rtl_band_2ghz,
                                sizeof(struct ieee80211_supported_band));

                /* <3> init ht cap base on ant_num */
                _rtl_init_hw_ht_capab(hw, &sband->ht_cap);

                /* <4> set mac->sband to wiphy->sband */
                hw->wiphy->bands[IEEE80211_BAND_2GHZ] = sband;

                /* 2: 5 G bands */
                /* <1> use  mac->bands as mem for hw->wiphy->bands */
                sband = &(rtlmac->bands[IEEE80211_BAND_5GHZ]);

                /* <2> set hw->wiphy->bands[IEEE80211_BAND_5GHZ]
                 * to default value(1T1R) */
                memcpy(&(rtlmac->bands[IEEE80211_BAND_5GHZ]), &rtl_band_5ghz,
                                sizeof(struct ieee80211_supported_band));

                /* <3> init ht cap base on ant_num */
                _rtl_init_hw_ht_capab(hw, &sband->ht_cap);

                /* <4> set mac->sband to wiphy->sband */
                hw->wiphy->bands[IEEE80211_BAND_5GHZ] = sband;
        } else {
                if (rtlhal->current_bandtype == BAND_ON_2_4G) {
                        /* <1> use  mac->bands as mem for hw->wiphy->bands */
                        sband = &(rtlmac->bands[IEEE80211_BAND_2GHZ]);

                        /* <2> set hw->wiphy->bands[IEEE80211_BAND_2GHZ]
                         * to default value(1T1R) */
                        memcpy(&(rtlmac->bands[IEEE80211_BAND_2GHZ]),
                                 &rtl_band_2ghz,
                                 sizeof(struct ieee80211_supported_band));

                        /* <3> init ht cap base on ant_num */
                        _rtl_init_hw_ht_capab(hw, &sband->ht_cap);

                        /* <4> set mac->sband to wiphy->sband */
                        hw->wiphy->bands[IEEE80211_BAND_2GHZ] = sband;
                } else if (rtlhal->current_bandtype == BAND_ON_5G) {
                        /* <1> use  mac->bands as mem for hw->wiphy->bands */
                        sband = &(rtlmac->bands[IEEE80211_BAND_5GHZ]);

                        /* <2> set hw->wiphy->bands[IEEE80211_BAND_5GHZ]
                         * to default value(1T1R) */
                        memcpy(&(rtlmac->bands[IEEE80211_BAND_5GHZ]),
                                 &rtl_band_5ghz,
                                 sizeof(struct ieee80211_supported_band));

                        /* <3> init ht cap base on ant_num */
                        _rtl_init_hw_ht_capab(hw, &sband->ht_cap);

                        /* <4> set mac->sband to wiphy->sband */
                        hw->wiphy->bands[IEEE80211_BAND_5GHZ] = sband;
                } else {
                        RT_TRACE(rtlpriv, COMP_INIT, DBG_EMERG, "Err BAND %d\n",
                                 rtlhal->current_bandtype);
                }
        }
        /* <5> set hw caps */
        hw->flags = IEEE80211_HW_SIGNAL_DBM |
            IEEE80211_HW_RX_INCLUDES_FCS |
            IEEE80211_HW_AMPDU_AGGREGATION |
            IEEE80211_HW_CONNECTION_MONITOR |
            /* IEEE80211_HW_SUPPORTS_CQM_RSSI | */
            IEEE80211_HW_REPORTS_TX_ACK_STATUS | 0;

        /* swlps or hwlps has been set in diff chip in init_sw_vars */
        if (rtlpriv->psc.swctrl_lps)
                hw->flags |= IEEE80211_HW_SUPPORTS_PS |
                        IEEE80211_HW_PS_NULLFUNC_STACK |
                        /* IEEE80211_HW_SUPPORTS_DYNAMIC_PS | */
                        0;

        hw->wiphy->interface_modes =
            BIT(NL80211_IFTYPE_AP) |
            BIT(NL80211_IFTYPE_STATION) |
            BIT(NL80211_IFTYPE_ADHOC);

        hw->wiphy->rts_threshold = 2347;

        hw->queues = AC_MAX;
        hw->extra_tx_headroom = RTL_TX_HEADER_SIZE;

        /* TODO: Correct this value for our hw */
        /* TODO: define these hard code value */
        hw->channel_change_time = 100;
        hw->max_listen_interval = 10;
        hw->max_rate_tries = 4;
        /* hw->max_rates = 1; */
        hw->sta_data_size = sizeof(struct rtl_sta_info);

        /* <6> mac address */
        if (is_valid_ether_addr(rtlefuse->dev_addr)) {
                SET_IEEE80211_PERM_ADDR(hw, rtlefuse->dev_addr);
        } else {
                u8 rtlmac1[] = { 0x00, 0xe0, 0x4c, 0x81, 0x92, 0x00 };
                get_random_bytes((rtlmac1 + (ETH_ALEN - 1)), 1);
                SET_IEEE80211_PERM_ADDR(hw, rtlmac1);
        }

}

static void _rtl_init_deferred_work(struct ieee80211_hw *hw)
{
        struct rtl_priv *rtlpriv = rtl_priv(hw);

        /* <1> timer */
        init_timer(&rtlpriv->works.watchdog_timer);
        setup_timer(&rtlpriv->works.watchdog_timer,
                    rtl_watch_dog_timer_callback, (unsigned long)hw);

        /* <2> work queue */
        rtlpriv->works.hw = hw;
        rtlpriv->works.rtl_wq = alloc_workqueue(rtlpriv->cfg->name, 0, 0);
        INIT_DELAYED_WORK(&rtlpriv->works.watchdog_wq,
                          (void *)rtl_watchdog_wq_callback);
        INIT_DELAYED_WORK(&rtlpriv->works.ips_nic_off_wq,
                          (void *)rtl_ips_nic_off_wq_callback);
        INIT_DELAYED_WORK(&rtlpriv->works.ps_work,
                          (void *)rtl_swlps_wq_callback);
        INIT_DELAYED_WORK(&rtlpriv->works.ps_rfon_wq,
                          (void *)rtl_swlps_rfon_wq_callback);

}

void rtl_deinit_deferred_work(struct ieee80211_hw *hw)
{
        struct rtl_priv *rtlpriv = rtl_priv(hw);

        del_timer_sync(&rtlpriv->works.watchdog_timer);

        cancel_delayed_work(&rtlpriv->works.watchdog_wq);
        cancel_delayed_work(&rtlpriv->works.ips_nic_off_wq);
        cancel_delayed_work(&rtlpriv->works.ps_work);
        cancel_delayed_work(&rtlpriv->works.ps_rfon_wq);
}

void rtl_init_rfkill(struct ieee80211_hw *hw)
{
        struct rtl_priv *rtlpriv = rtl_priv(hw);

        bool radio_state;
        bool blocked;
        u8 valid = 0;

        /*set init state to on */
        rtlpriv->rfkill.rfkill_state = true;
        wiphy_rfkill_set_hw_state(hw->wiphy, 0);

        radio_state = rtlpriv->cfg->ops->radio_onoff_checking(hw, &valid);

        if (valid) {
                pr_info("wireless switch is %s\n",
                        rtlpriv->rfkill.rfkill_state ? "on" : "off");

                rtlpriv->rfkill.rfkill_state = radio_state;

                blocked = (rtlpriv->rfkill.rfkill_state == 1) ? 0 : 1;
                wiphy_rfkill_set_hw_state(hw->wiphy, blocked);
        }

        wiphy_rfkill_start_polling(hw->wiphy);
}
EXPORT_SYMBOL(rtl_init_rfkill);

void rtl_deinit_rfkill(struct ieee80211_hw *hw)
{
        wiphy_rfkill_stop_polling(hw->wiphy);
}

int rtl_init_core(struct ieee80211_hw *hw)
{
        struct rtl_priv *rtlpriv = rtl_priv(hw);
        struct rtl_mac *rtlmac = rtl_mac(rtl_priv(hw));

        /* <1> init mac80211 */
        _rtl_init_mac80211(hw);
        rtlmac->hw = hw;

        /* <2> rate control register */
        hw->rate_control_algorithm = "rtl_rc";

        /*
         * <3> init CRDA must come after init
         * mac80211 hw  in _rtl_init_mac80211.
         */
        if (rtl_regd_init(hw, rtl_reg_notifier)) {
                RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG, "REGD init failed\n");
                return 1;
        } else {
                /* CRDA regd hint must after init CRDA */
                if (regulatory_hint(hw->wiphy, rtlpriv->regd.alpha2)) {
                        RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING,
                                 "regulatory_hint fail\n");
                }
        }

        /* <4> locks */
        mutex_init(&rtlpriv->locks.conf_mutex);
        mutex_init(&rtlpriv->locks.ps_mutex);
        spin_lock_init(&rtlpriv->locks.ips_lock);
        spin_lock_init(&rtlpriv->locks.irq_th_lock);
        spin_lock_init(&rtlpriv->locks.h2c_lock);
        spin_lock_init(&rtlpriv->locks.rf_ps_lock);
        spin_lock_init(&rtlpriv->locks.rf_lock);
        spin_lock_init(&rtlpriv->locks.waitq_lock);
        spin_lock_init(&rtlpriv->locks.cck_and_rw_pagea_lock);

        rtlmac->link_state = MAC80211_NOLINK;

        /* <5> init deferred work */
        _rtl_init_deferred_work(hw);

        return 0;
}

void rtl_deinit_core(struct ieee80211_hw *hw)
{
}

void rtl_init_rx_config(struct ieee80211_hw *hw)
{
        struct rtl_priv *rtlpriv = rtl_priv(hw);
        struct rtl_mac *mac = rtl_mac(rtl_priv(hw));

        rtlpriv->cfg->ops->get_hw_reg(hw, HW_VAR_RCR, (u8 *) (&mac->rx_conf));
}

/*********************************************************
 *
 * tx information functions
 *
 *********************************************************/
static void _rtl_qurey_shortpreamble_mode(struct ieee80211_hw *hw,
                                          struct rtl_tcb_desc *tcb_desc,
                                          struct ieee80211_tx_info *info)
{
        struct rtl_priv *rtlpriv = rtl_priv(hw);
        u8 rate_flag = info->control.rates[0].flags;

        tcb_desc->use_shortpreamble = false;

        /* 1M can only use Long Preamble. 11B spec */
        if (tcb_desc->hw_rate == rtlpriv->cfg->maps[RTL_RC_CCK_RATE1M])
                return;
        else if (rate_flag & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)
                tcb_desc->use_shortpreamble = true;

        return;
}

static void _rtl_query_shortgi(struct ieee80211_hw *hw,
                               struct ieee80211_sta *sta,
                               struct rtl_tcb_desc *tcb_desc,
                               struct ieee80211_tx_info *info)
{
        struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
        u8 rate_flag = info->control.rates[0].flags;
        u8 sgi_40 = 0, sgi_20 = 0, bw_40 = 0;
        tcb_desc->use_shortgi = false;

        if (sta == NULL)
                return;

        sgi_40 = sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_40;
        sgi_20 = sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_20;

        if (!(sta->ht_cap.ht_supported))
                return;

        if (!sgi_40 && !sgi_20)
                return;

        if (mac->opmode == NL80211_IFTYPE_STATION)
                bw_40 = mac->bw_40;
        else if (mac->opmode == NL80211_IFTYPE_AP ||
                mac->opmode == NL80211_IFTYPE_ADHOC)
                bw_40 = sta->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40;

        if (bw_40 && sgi_40)
                tcb_desc->use_shortgi = true;
        else if ((bw_40 == false) && sgi_20)
                tcb_desc->use_shortgi = true;

        if (!(rate_flag & IEEE80211_TX_RC_SHORT_GI))
                tcb_desc->use_shortgi = false;
}

static void _rtl_query_protection_mode(struct ieee80211_hw *hw,
                                       struct rtl_tcb_desc *tcb_desc,
                                       struct ieee80211_tx_info *info)
{
        struct rtl_priv *rtlpriv = rtl_priv(hw);
        u8 rate_flag = info->control.rates[0].flags;

        /* Common Settings */
        tcb_desc->rts_stbc = false;
        tcb_desc->cts_enable = false;
        tcb_desc->rts_sc = 0;
        tcb_desc->rts_bw = false;
        tcb_desc->rts_use_shortpreamble = false;
        tcb_desc->rts_use_shortgi = false;

        if (rate_flag & IEEE80211_TX_RC_USE_CTS_PROTECT) {
                /* Use CTS-to-SELF in protection mode. */
                tcb_desc->rts_enable = true;
                tcb_desc->cts_enable = true;
                tcb_desc->rts_rate = rtlpriv->cfg->maps[RTL_RC_OFDM_RATE24M];
        } else if (rate_flag & IEEE80211_TX_RC_USE_RTS_CTS) {
                /* Use RTS-CTS in protection mode. */
                tcb_desc->rts_enable = true;
                tcb_desc->rts_rate = rtlpriv->cfg->maps[RTL_RC_OFDM_RATE24M];
        }
}

static void _rtl_txrate_selectmode(struct ieee80211_hw *hw,
                                   struct ieee80211_sta *sta,
                                   struct rtl_tcb_desc *tcb_desc)
{
        struct rtl_priv *rtlpriv = rtl_priv(hw);
        struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
        struct rtl_sta_info *sta_entry = NULL;
        u8 ratr_index = 7;

        if (sta) {
                sta_entry = (struct rtl_sta_info *) sta->drv_priv;
                ratr_index = sta_entry->ratr_index;
        }
        if (!tcb_desc->disable_ratefallback || !tcb_desc->use_driver_rate) {
                if (mac->opmode == NL80211_IFTYPE_STATION) {
                        tcb_desc->ratr_index = 0;
                } else if (mac->opmode == NL80211_IFTYPE_ADHOC) {
                        if (tcb_desc->multicast || tcb_desc->broadcast) {
                                tcb_desc->hw_rate =
                                    rtlpriv->cfg->maps[RTL_RC_CCK_RATE2M];
                                tcb_desc->use_driver_rate = 1;
                        } else {
                                /* TODO */
                        }
                        tcb_desc->ratr_index = ratr_index;
                } else if (mac->opmode == NL80211_IFTYPE_AP) {
                        tcb_desc->ratr_index = ratr_index;
                }
        }

        if (rtlpriv->dm.useramask) {
                /* TODO we will differentiate adhoc and station futrue  */
                if (mac->opmode == NL80211_IFTYPE_STATION) {
                        tcb_desc->mac_id = 0;

                        if (mac->mode == WIRELESS_MODE_N_24G)
                                tcb_desc->ratr_index = RATR_INX_WIRELESS_NGB;
                        else if (mac->mode == WIRELESS_MODE_N_5G)
                                tcb_desc->ratr_index = RATR_INX_WIRELESS_NG;
                        else if (mac->mode & WIRELESS_MODE_G)
                                tcb_desc->ratr_index = RATR_INX_WIRELESS_GB;
                        else if (mac->mode & WIRELESS_MODE_B)
                                tcb_desc->ratr_index = RATR_INX_WIRELESS_B;
                        else if (mac->mode & WIRELESS_MODE_A)
                                tcb_desc->ratr_index = RATR_INX_WIRELESS_G;
                } else if (mac->opmode == NL80211_IFTYPE_AP ||
                        mac->opmode == NL80211_IFTYPE_ADHOC) {
                        if (NULL != sta) {
                                if (sta->aid > 0)
                                        tcb_desc->mac_id = sta->aid + 1;
                                else
                                        tcb_desc->mac_id = 1;
                        } else {
                                tcb_desc->mac_id = 0;
                        }
                }
        }

}

static void _rtl_query_bandwidth_mode(struct ieee80211_hw *hw,
                                      struct ieee80211_sta *sta,
                                      struct rtl_tcb_desc *tcb_desc)
{
        struct rtl_priv *rtlpriv = rtl_priv(hw);
        struct rtl_mac *mac = rtl_mac(rtl_priv(hw));

        tcb_desc->packet_bw = false;
        if (!sta)
                return;
        if (mac->opmode == NL80211_IFTYPE_AP ||
            mac->opmode == NL80211_IFTYPE_ADHOC) {
                if (!(sta->ht_cap.ht_supported) ||
                    !(sta->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
                        return;
        } else if (mac->opmode == NL80211_IFTYPE_STATION) {
                if (!mac->bw_40 || !(sta->ht_cap.ht_supported))
                        return;
        }
        if (tcb_desc->multicast || tcb_desc->broadcast)
                return;

        /*use legency rate, shall use 20MHz */
        if (tcb_desc->hw_rate <= rtlpriv->cfg->maps[RTL_RC_OFDM_RATE54M])
                return;

        tcb_desc->packet_bw = true;
}

static u8 _rtl_get_highest_n_rate(struct ieee80211_hw *hw)
{
        struct rtl_priv *rtlpriv = rtl_priv(hw);
        struct rtl_phy *rtlphy = &(rtlpriv->phy);
        u8 hw_rate;

        if (get_rf_type(rtlphy) == RF_2T2R)
                hw_rate = rtlpriv->cfg->maps[RTL_RC_HT_RATEMCS15];
        else
                hw_rate = rtlpriv->cfg->maps[RTL_RC_HT_RATEMCS7];

        return hw_rate;
}

/* mac80211's rate_idx is like this:
 *
 * 2.4G band:rx_status->band == IEEE80211_BAND_2GHZ
 *
 * B/G rate:
 * (rx_status->flag & RX_FLAG_HT) = 0,
 * DESC92_RATE1M-->DESC92_RATE54M ==> idx is 0-->11,
 *
 * N rate:
 * (rx_status->flag & RX_FLAG_HT) = 1,
 * DESC92_RATEMCS0-->DESC92_RATEMCS15 ==> idx is 0-->15
 *
 * 5G band:rx_status->band == IEEE80211_BAND_5GHZ
 * A rate:
 * (rx_status->flag & RX_FLAG_HT) = 0,
 * DESC92_RATE6M-->DESC92_RATE54M ==> idx is 0-->7,
 *
 * N rate:
 * (rx_status->flag & RX_FLAG_HT) = 1,
 * DESC92_RATEMCS0-->DESC92_RATEMCS15 ==> idx is 0-->15
 */
int rtlwifi_rate_mapping(struct ieee80211_hw *hw,
                         bool isht, u8 desc_rate, bool first_ampdu)
{
        int rate_idx;

        if (false == isht) {
                if (IEEE80211_BAND_2GHZ == hw->conf.channel->band) {
                        switch (desc_rate) {
                        case DESC92_RATE1M:
                                rate_idx = 0;
                                break;
                        case DESC92_RATE2M:
                                rate_idx = 1;
                                break;
                        case DESC92_RATE5_5M:
                                rate_idx = 2;
                                break;
                        case DESC92_RATE11M:
                                rate_idx = 3;
                                break;
                        case DESC92_RATE6M:
                                rate_idx = 4;
                                break;
                        case DESC92_RATE9M:
                                rate_idx = 5;
                                break;
                        case DESC92_RATE12M:
                                rate_idx = 6;
                                break;
                        case DESC92_RATE18M:
                                rate_idx = 7;
                                break;
                        case DESC92_RATE24M:
                                rate_idx = 8;
                                break;
                        case DESC92_RATE36M:
                                rate_idx = 9;
                                break;
                        case DESC92_RATE48M:
                                rate_idx = 10;
                                break;
                        case DESC92_RATE54M:
                                rate_idx = 11;
                                break;
                        default:
                                rate_idx = 0;
                                break;
                        }
                } else {
                        switch (desc_rate) {
                        case DESC92_RATE6M:
                                rate_idx = 0;
                                break;
                        case DESC92_RATE9M:
                                rate_idx = 1;
                                break;
                        case DESC92_RATE12M:
                                rate_idx = 2;
                                break;
                        case DESC92_RATE18M:
                                rate_idx = 3;
                                break;
                        case DESC92_RATE24M:
                                rate_idx = 4;
                                break;
                        case DESC92_RATE36M:
                                rate_idx = 5;
                                break;
                        case DESC92_RATE48M:
                                rate_idx = 6;
                                break;
                        case DESC92_RATE54M:
                                rate_idx = 7;
                                break;
                        default:
                                rate_idx = 0;
                                break;
                        }
                }

        } else {

                switch (desc_rate) {
                case DESC92_RATEMCS0:
                        rate_idx = 0;
                        break;
                case DESC92_RATEMCS1:
                        rate_idx = 1;
                        break;
                case DESC92_RATEMCS2:
                        rate_idx = 2;
                        break;
                case DESC92_RATEMCS3:
                        rate_idx = 3;
                        break;
                case DESC92_RATEMCS4:
                        rate_idx = 4;
                        break;
                case DESC92_RATEMCS5:
                        rate_idx = 5;
                        break;
                case DESC92_RATEMCS6:
                        rate_idx = 6;
                        break;
                case DESC92_RATEMCS7:
                        rate_idx = 7;
                        break;
                case DESC92_RATEMCS8:
                        rate_idx = 8;
                        break;
                case DESC92_RATEMCS9:
                        rate_idx = 9;
                        break;
                case DESC92_RATEMCS10:
                        rate_idx = 10;
                        break;
                case DESC92_RATEMCS11:
                        rate_idx = 11;
                        break;
                case DESC92_RATEMCS12:
                        rate_idx = 12;
                        break;
                case DESC92_RATEMCS13:
                        rate_idx = 13;
                        break;
                case DESC92_RATEMCS14:
                        rate_idx = 14;
                        break;
                case DESC92_RATEMCS15:
                        rate_idx = 15;
                        break;
                default:
                        rate_idx = 0;
                        break;
                }
        }
        return rate_idx;
}
EXPORT_SYMBOL(rtlwifi_rate_mapping);

void rtl_get_tcb_desc(struct ieee80211_hw *hw,
                      struct ieee80211_tx_info *info,
                      struct ieee80211_sta *sta,
                      struct sk_buff *skb, struct rtl_tcb_desc *tcb_desc)
{
        struct rtl_priv *rtlpriv = rtl_priv(hw);
        struct rtl_mac *rtlmac = rtl_mac(rtl_priv(hw));
        struct ieee80211_hdr *hdr = rtl_get_hdr(skb);
        struct ieee80211_rate *txrate;
        __le16 fc = hdr->frame_control;

        txrate = ieee80211_get_tx_rate(hw, info);
        if (txrate)
                tcb_desc->hw_rate = txrate->hw_value;
        else
                tcb_desc->hw_rate = 0;

        if (ieee80211_is_data(fc)) {
                /*
                 *we set data rate INX 0
                 *in rtl_rc.c   if skb is special data or
                 *mgt which need low data rate.
                 */

                /*
                 *So tcb_desc->hw_rate is just used for
                 *special data and mgt frames
                 */
                if (info->control.rates[0].idx == 0 ||
                                ieee80211_is_nullfunc(fc)) {
                        tcb_desc->use_driver_rate = true;
                        tcb_desc->ratr_index = RATR_INX_WIRELESS_MC;

                        tcb_desc->disable_ratefallback = 1;
                } else {
                        /*
                         *because hw will nerver use hw_rate
                         *when tcb_desc->use_driver_rate = false
                         *so we never set highest N rate here,
                         *and N rate will all be controlled by FW
                         *when tcb_desc->use_driver_rate = false
                         */
                        if (sta && (sta->ht_cap.ht_supported)) {
                                tcb_desc->hw_rate = _rtl_get_highest_n_rate(hw);
                        } else {
                                if (rtlmac->mode == WIRELESS_MODE_B) {
                                        tcb_desc->hw_rate =
                                           rtlpriv->cfg->maps[RTL_RC_CCK_RATE11M];
                                } else {
                                        tcb_desc->hw_rate =
                                           rtlpriv->cfg->maps[RTL_RC_OFDM_RATE54M];
                                }
                        }
                }

                if (is_multicast_ether_addr(ieee80211_get_DA(hdr)))
                        tcb_desc->multicast = 1;
                else if (is_broadcast_ether_addr(ieee80211_get_DA(hdr)))
                        tcb_desc->broadcast = 1;

                _rtl_txrate_selectmode(hw, sta, tcb_desc);
                _rtl_query_bandwidth_mode(hw, sta, tcb_desc);
                _rtl_qurey_shortpreamble_mode(hw, tcb_desc, info);
                _rtl_query_shortgi(hw, sta, tcb_desc, info);
                _rtl_query_protection_mode(hw, tcb_desc, info);
        } else {
                tcb_desc->use_driver_rate = true;
                tcb_desc->ratr_index = RATR_INX_WIRELESS_MC;
                tcb_desc->disable_ratefallback = 1;
                tcb_desc->mac_id = 0;
                tcb_desc->packet_bw = false;
        }
}
EXPORT_SYMBOL(rtl_get_tcb_desc);

bool rtl_action_proc(struct ieee80211_hw *hw, struct sk_buff *skb, u8 is_tx)
{
        struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
        struct ieee80211_hdr *hdr = rtl_get_hdr(skb);
        struct rtl_priv *rtlpriv = rtl_priv(hw);
        __le16 fc = hdr->frame_control;
        u8 *act = (u8 *)skb->data + MAC80211_3ADDR_LEN;
        u8 category;

        if (!ieee80211_is_action(fc))
                return true;

        category = *act;
        act++;
        switch (category) {
        case ACT_CAT_BA:
                switch (*act) {
                case ACT_ADDBAREQ:
                        if (mac->act_scanning)
                                return false;

                        RT_TRACE(rtlpriv, (COMP_SEND | COMP_RECV), DBG_DMESG,
                                 "%s ACT_ADDBAREQ From :%pM\n",
                                 is_tx ? "Tx" : "Rx", hdr->addr2);
                        break;
                case ACT_ADDBARSP:
                        RT_TRACE(rtlpriv, (COMP_SEND | COMP_RECV), DBG_DMESG,
                                 "%s ACT_ADDBARSP From :%pM\n",
                                 is_tx ? "Tx" : "Rx", hdr->addr2);
                        break;
                case ACT_DELBA:
                        RT_TRACE(rtlpriv, (COMP_SEND | COMP_RECV), DBG_DMESG,
                                 "ACT_ADDBADEL From :%pM\n", hdr->addr2);
                        break;
                }
                break;
        default:
                break;
        }

        return true;
}

/*should call before software enc*/
u8 rtl_is_special_data(struct ieee80211_hw *hw, struct sk_buff *skb, u8 is_tx)
{
        struct rtl_priv *rtlpriv = rtl_priv(hw);
        struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
        __le16 fc = rtl_get_fc(skb);
        u16 ether_type;
        u8 mac_hdr_len = ieee80211_get_hdrlen_from_skb(skb);
        const struct iphdr *ip;

        if (!ieee80211_is_data(fc))
                return false;


        ip = (struct iphdr *)((u8 *) skb->data + mac_hdr_len +
                              SNAP_SIZE + PROTOC_TYPE_SIZE);
        ether_type = *(u16 *) ((u8 *) skb->data + mac_hdr_len + SNAP_SIZE);
        /*      ether_type = ntohs(ether_type); */

        if (ETH_P_IP == ether_type) {
                if (IPPROTO_UDP == ip->protocol) {
                        struct udphdr *udp = (struct udphdr *)((u8 *) ip +
                                                               (ip->ihl << 2));
                        if (((((u8 *) udp)[1] == 68) &&
                             (((u8 *) udp)[3] == 67)) ||
                            ((((u8 *) udp)[1] == 67) &&
                             (((u8 *) udp)[3] == 68))) {
                                /*
                                 * 68 : UDP BOOTP client
                                 * 67 : UDP BOOTP server
                                 */
                                RT_TRACE(rtlpriv, (COMP_SEND | COMP_RECV),
                                         DBG_DMESG, "dhcp %s !!\n",
                                         is_tx ? "Tx" : "Rx");

                                if (is_tx) {
                                        rtl_lps_leave(hw);
                                        ppsc->last_delaylps_stamp_jiffies =
                                            jiffies;
                                }

                                return true;
                        }
                }
        } else if (ETH_P_ARP == ether_type) {
                if (is_tx) {
                        rtl_lps_leave(hw);
                        ppsc->last_delaylps_stamp_jiffies = jiffies;
                }

                return true;
        } else if (ETH_P_PAE == ether_type) {
                RT_TRACE(rtlpriv, (COMP_SEND | COMP_RECV), DBG_DMESG,
                         "802.1X %s EAPOL pkt!!\n", is_tx ? "Tx" : "Rx");

                if (is_tx) {
                        rtl_lps_leave(hw);
                        ppsc->last_delaylps_stamp_jiffies = jiffies;
                }

                return true;
        } else if (ETH_P_IPV6 == ether_type) {
                /* IPv6 */
                return true;
        }

        return false;
}

/*********************************************************
 *
 * functions called by core.c
 *
 *********************************************************/
int rtl_tx_agg_start(struct ieee80211_hw *hw,
                struct ieee80211_sta *sta, u16 tid, u16 *ssn)
{
        struct rtl_priv *rtlpriv = rtl_priv(hw);
        struct rtl_tid_data *tid_data;
        struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
        struct rtl_sta_info *sta_entry = NULL;

        if (sta == NULL)
                return -EINVAL;

        if (unlikely(tid >= MAX_TID_COUNT))
                return -EINVAL;

        sta_entry = (struct rtl_sta_info *)sta->drv_priv;
        if (!sta_entry)
                return -ENXIO;
        tid_data = &sta_entry->tids[tid];

        RT_TRACE(rtlpriv, COMP_SEND, DBG_DMESG, "on ra = %pM tid = %d seq:%d\n",
                 sta->addr, tid, tid_data->seq_number);

        *ssn = tid_data->seq_number;
        tid_data->agg.agg_state = RTL_AGG_START;

        ieee80211_start_tx_ba_cb_irqsafe(mac->vif, sta->addr, tid);

        return 0;
}

int rtl_tx_agg_stop(struct ieee80211_hw *hw,
                struct ieee80211_sta *sta, u16 tid)
{
        struct rtl_priv *rtlpriv = rtl_priv(hw);
        struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
        struct rtl_sta_info *sta_entry = NULL;

        if (sta == NULL)
                return -EINVAL;

        if (!sta->addr) {
                RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG, "ra = NULL\n");
                return -EINVAL;
        }

        RT_TRACE(rtlpriv, COMP_SEND, DBG_DMESG, "on ra = %pM tid = %d\n",
                 sta->addr, tid);

        if (unlikely(tid >= MAX_TID_COUNT))
                return -EINVAL;

        sta_entry = (struct rtl_sta_info *)sta->drv_priv;
        sta_entry->tids[tid].agg.agg_state = RTL_AGG_STOP;

        ieee80211_stop_tx_ba_cb_irqsafe(mac->vif, sta->addr, tid);

        return 0;
}

int rtl_tx_agg_oper(struct ieee80211_hw *hw,
                struct ieee80211_sta *sta, u16 tid)
{
        struct rtl_priv *rtlpriv = rtl_priv(hw);
        struct rtl_sta_info *sta_entry = NULL;

        if (sta == NULL)
                return -EINVAL;

        if (!sta->addr) {
                RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG, "ra = NULL\n");
                return -EINVAL;
        }

        RT_TRACE(rtlpriv, COMP_SEND, DBG_DMESG, "on ra = %pM tid = %d\n",
                 sta->addr, tid);

        if (unlikely(tid >= MAX_TID_COUNT))
                return -EINVAL;

        sta_entry = (struct rtl_sta_info *)sta->drv_priv;
        sta_entry->tids[tid].agg.agg_state = RTL_AGG_OPERATIONAL;

        return 0;
}

/*********************************************************
 *
 * wq & timer callback functions
 *
 *********************************************************/
void rtl_watchdog_wq_callback(void *data)
{
        struct rtl_works *rtlworks = container_of_dwork_rtl(data,
                                                            struct rtl_works,
                                                            watchdog_wq);
        struct ieee80211_hw *hw = rtlworks->hw;
        struct rtl_priv *rtlpriv = rtl_priv(hw);
        struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
        struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
        bool busytraffic = false;
        bool higher_busytraffic = false;
        bool higher_busyrxtraffic = false;
        u8 idx, tid;
        u32 rx_cnt_inp4eriod = 0;
        u32 tx_cnt_inp4eriod = 0;
        u32 aver_rx_cnt_inperiod = 0;
        u32 aver_tx_cnt_inperiod = 0;
        u32 aver_tidtx_inperiod[MAX_TID_COUNT] = {0};
        u32 tidtx_inp4eriod[MAX_TID_COUNT] = {0};
        bool enter_ps = false;

        if (is_hal_stop(rtlhal))
                return;

        /* <1> Determine if action frame is allowed */
        if (mac->link_state > MAC80211_NOLINK) {
                if (mac->cnt_after_linked < 20)
                        mac->cnt_after_linked++;
        } else {
                mac->cnt_after_linked = 0;
        }

        /*
         *<2> to check if traffic busy, if
         * busytraffic we don't change channel
         */
        if (mac->link_state >= MAC80211_LINKED) {

                /* (1) get aver_rx_cnt_inperiod & aver_tx_cnt_inperiod */
                for (idx = 0; idx <= 2; idx++) {
                        rtlpriv->link_info.num_rx_in4period[idx] =
                            rtlpriv->link_info.num_rx_in4period[idx + 1];
                        rtlpriv->link_info.num_tx_in4period[idx] =
                            rtlpriv->link_info.num_tx_in4period[idx + 1];
                }
                rtlpriv->link_info.num_rx_in4period[3] =
                    rtlpriv->link_info.num_rx_inperiod;
                rtlpriv->link_info.num_tx_in4period[3] =
                    rtlpriv->link_info.num_tx_inperiod;
                for (idx = 0; idx <= 3; idx++) {
                        rx_cnt_inp4eriod +=
                            rtlpriv->link_info.num_rx_in4period[idx];
                        tx_cnt_inp4eriod +=
                            rtlpriv->link_info.num_tx_in4period[idx];
                }
                aver_rx_cnt_inperiod = rx_cnt_inp4eriod / 4;
                aver_tx_cnt_inperiod = tx_cnt_inp4eriod / 4;

                /* (2) check traffic busy */
                if (aver_rx_cnt_inperiod > 100 || aver_tx_cnt_inperiod > 100)
                        busytraffic = true;

                /* Higher Tx/Rx data. */
                if (aver_rx_cnt_inperiod > 4000 ||
                    aver_tx_cnt_inperiod > 4000) {
                        higher_busytraffic = true;

                        /* Extremely high Rx data. */
                        if (aver_rx_cnt_inperiod > 5000)
                                higher_busyrxtraffic = true;
                }

                /* check every tid's tx traffic */
                for (tid = 0; tid <= 7; tid++) {
                        for (idx = 0; idx <= 2; idx++)
                                rtlpriv->link_info.tidtx_in4period[tid][idx] =
                                  rtlpriv->link_info.tidtx_in4period[tid]
                                  [idx + 1];
                        rtlpriv->link_info.tidtx_in4period[tid][3] =
                                rtlpriv->link_info.tidtx_inperiod[tid];

                        for (idx = 0; idx <= 3; idx++)
                                tidtx_inp4eriod[tid] +=
                                  rtlpriv->link_info.tidtx_in4period[tid][idx];
                        aver_tidtx_inperiod[tid] = tidtx_inp4eriod[tid] / 4;
                        if (aver_tidtx_inperiod[tid] > 5000)
                                rtlpriv->link_info.higher_busytxtraffic[tid] =
                                                   true;
                        else
                                rtlpriv->link_info.higher_busytxtraffic[tid] =
                                                   false;
                }

                if (((rtlpriv->link_info.num_rx_inperiod +
                      rtlpriv->link_info.num_tx_inperiod) > 8) ||
                    (rtlpriv->link_info.num_rx_inperiod > 2))
                        enter_ps = false;
                else
                        enter_ps = true;

                /* LeisurePS only work in infra mode. */
                if (enter_ps)
                        rtl_lps_enter(hw);
                else
                        rtl_lps_leave(hw);
        }

        rtlpriv->link_info.num_rx_inperiod = 0;
        rtlpriv->link_info.num_tx_inperiod = 0;
        for (tid = 0; tid <= 7; tid++)
                rtlpriv->link_info.tidtx_inperiod[tid] = 0;

        rtlpriv->link_info.busytraffic = busytraffic;
        rtlpriv->link_info.higher_busytraffic = higher_busytraffic;
        rtlpriv->link_info.higher_busyrxtraffic = higher_busyrxtraffic;

        /* <3> DM */
        rtlpriv->cfg->ops->dm_watchdog(hw);
}

void rtl_watch_dog_timer_callback(unsigned long data)
{
        struct ieee80211_hw *hw = (struct ieee80211_hw *)data;
        struct rtl_priv *rtlpriv = rtl_priv(hw);

        queue_delayed_work(rtlpriv->works.rtl_wq,
                           &rtlpriv->works.watchdog_wq, 0);

        mod_timer(&rtlpriv->works.watchdog_timer,
                  jiffies + MSECS(RTL_WATCH_DOG_TIME));
}

/*********************************************************
 *
 * frame process functions
 *
 *********************************************************/
u8 *rtl_find_ie(u8 *data, unsigned int len, u8 ie)
{
        struct ieee80211_mgmt *mgmt = (void *)data;
        u8 *pos, *end;

        pos = (u8 *)mgmt->u.beacon.variable;
        end = data + len;
        while (pos < end) {
                if (pos + 2 + pos[1] > end)
                        return NULL;

                if (pos[0] == ie)
                        return pos;

                pos += 2 + pos[1];
        }
        return NULL;
}

/* when we use 2 rx ants we send IEEE80211_SMPS_OFF */
/* when we use 1 rx ant we send IEEE80211_SMPS_STATIC */
static struct sk_buff *rtl_make_smps_action(struct ieee80211_hw *hw,
                enum ieee80211_smps_mode smps, u8 *da, u8 *bssid)
{
        struct rtl_efuse *rtlefuse = rtl_efuse(rtl_priv(hw));
        struct sk_buff *skb;
        struct ieee80211_mgmt *action_frame;

        /* 27 = header + category + action + smps mode */
        skb = dev_alloc_skb(27 + hw->extra_tx_headroom);
        if (!skb)
                return NULL;

        skb_reserve(skb, hw->extra_tx_headroom);
        action_frame = (void *)skb_put(skb, 27);
        memset(action_frame, 0, 27);
        memcpy(action_frame->da, da, ETH_ALEN);
        memcpy(action_frame->sa, rtlefuse->dev_addr, ETH_ALEN);
        memcpy(action_frame->bssid, bssid, ETH_ALEN);
        action_frame->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
                                                  IEEE80211_STYPE_ACTION);
        action_frame->u.action.category = WLAN_CATEGORY_HT;
        action_frame->u.action.u.ht_smps.action = WLAN_HT_ACTION_SMPS;
        switch (smps) {
        case IEEE80211_SMPS_AUTOMATIC:/* 0 */
        case IEEE80211_SMPS_NUM_MODES:/* 4 */
                WARN_ON(1);
        case IEEE80211_SMPS_OFF:/* 1 */ /*MIMO_PS_NOLIMIT*/
                action_frame->u.action.u.ht_smps.smps_control =
                                WLAN_HT_SMPS_CONTROL_DISABLED;/* 0 */
                break;
        case IEEE80211_SMPS_STATIC:/* 2 */ /*MIMO_PS_STATIC*/
                action_frame->u.action.u.ht_smps.smps_control =
                                WLAN_HT_SMPS_CONTROL_STATIC;/* 1 */
                break;
        case IEEE80211_SMPS_DYNAMIC:/* 3 */ /*MIMO_PS_DYNAMIC*/
                action_frame->u.action.u.ht_smps.smps_control =
                                WLAN_HT_SMPS_CONTROL_DYNAMIC;/* 3 */
                break;
        }

        return skb;
}

int rtl_send_smps_action(struct ieee80211_hw *hw,
                struct ieee80211_sta *sta, u8 *da, u8 *bssid,
                enum ieee80211_smps_mode smps)
{
        struct rtl_priv *rtlpriv = rtl_priv(hw);
        struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
        struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
        struct sk_buff *skb = rtl_make_smps_action(hw, smps, da, bssid);
        struct rtl_tcb_desc tcb_desc;
        memset(&tcb_desc, 0, sizeof(struct rtl_tcb_desc));

        if (rtlpriv->mac80211.act_scanning)
                goto err_free;

        if (!sta)
                goto err_free;

        if (unlikely(is_hal_stop(rtlhal) || ppsc->rfpwr_state != ERFON))
                goto err_free;

        if (!test_bit(RTL_STATUS_INTERFACE_START, &rtlpriv->status))
                goto err_free;

        /* this is a type = mgmt * stype = action frame */
        if (skb) {
                struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
                struct rtl_sta_info *sta_entry =
                        (struct rtl_sta_info *) sta->drv_priv;
                sta_entry->mimo_ps = smps;
                rtlpriv->cfg->ops->update_rate_tbl(hw, sta, 0);

                info->control.rates[0].idx = 0;
                info->band = hw->conf.channel->band;
                rtlpriv->intf_ops->adapter_tx(hw, sta, skb, &tcb_desc);
        }
err_free:
        return 0;
}

/*********************************************************
 *
 * IOT functions
 *
 *********************************************************/
static bool rtl_chk_vendor_ouisub(struct ieee80211_hw *hw,
                struct octet_string vendor_ie)
{
        struct rtl_priv *rtlpriv = rtl_priv(hw);
        bool matched = false;
        static u8 athcap_1[] = { 0x00, 0x03, 0x7F };
        static u8 athcap_2[] = { 0x00, 0x13, 0x74 };
        static u8 broadcap_1[] = { 0x00, 0x10, 0x18 };
        static u8 broadcap_2[] = { 0x00, 0x0a, 0xf7 };
        static u8 broadcap_3[] = { 0x00, 0x05, 0xb5 };
        static u8 racap[] = { 0x00, 0x0c, 0x43 };
        static u8 ciscocap[] = { 0x00, 0x40, 0x96 };
        static u8 marvcap[] = { 0x00, 0x50, 0x43 };

        if (memcmp(vendor_ie.octet, athcap_1, 3) == 0 ||
                memcmp(vendor_ie.octet, athcap_2, 3) == 0) {
                rtlpriv->mac80211.vendor = PEER_ATH;
                matched = true;
        } else if (memcmp(vendor_ie.octet, broadcap_1, 3) == 0 ||
                memcmp(vendor_ie.octet, broadcap_2, 3) == 0 ||
                memcmp(vendor_ie.octet, broadcap_3, 3) == 0) {
                rtlpriv->mac80211.vendor = PEER_BROAD;
                matched = true;
        } else if (memcmp(vendor_ie.octet, racap, 3) == 0) {
                rtlpriv->mac80211.vendor = PEER_RAL;
                matched = true;
        } else if (memcmp(vendor_ie.octet, ciscocap, 3) == 0) {
                rtlpriv->mac80211.vendor = PEER_CISCO;
                matched = true;
        } else if (memcmp(vendor_ie.octet, marvcap, 3) == 0) {
                rtlpriv->mac80211.vendor = PEER_MARV;
                matched = true;
        }

        return matched;
}

static bool rtl_find_221_ie(struct ieee80211_hw *hw, u8 *data,
                unsigned int len)
{
        struct ieee80211_mgmt *mgmt = (void *)data;
        struct octet_string vendor_ie;
        u8 *pos, *end;

        pos = (u8 *)mgmt->u.beacon.variable;
        end = data + len;
        while (pos < end) {
                if (pos[0] == 221) {
                        vendor_ie.length = pos[1];
                        vendor_ie.octet = &pos[2];
                        if (rtl_chk_vendor_ouisub(hw, vendor_ie))
                                return true;
                }

                if (pos + 2 + pos[1] > end)
                        return false;

                pos += 2 + pos[1];
        }
        return false;
}

void rtl_recognize_peer(struct ieee80211_hw *hw, u8 *data, unsigned int len)
{
        struct rtl_priv *rtlpriv = rtl_priv(hw);
        struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
        struct ieee80211_hdr *hdr = (void *)data;
        u32 vendor = PEER_UNKNOWN;

        static u8 ap3_1[3] = { 0x00, 0x14, 0xbf };
        static u8 ap3_2[3] = { 0x00, 0x1a, 0x70 };
        static u8 ap3_3[3] = { 0x00, 0x1d, 0x7e };
        static u8 ap4_1[3] = { 0x00, 0x90, 0xcc };
        static u8 ap4_2[3] = { 0x00, 0x0e, 0x2e };
        static u8 ap4_3[3] = { 0x00, 0x18, 0x02 };
        static u8 ap4_4[3] = { 0x00, 0x17, 0x3f };
        static u8 ap4_5[3] = { 0x00, 0x1c, 0xdf };
        static u8 ap5_1[3] = { 0x00, 0x1c, 0xf0 };
        static u8 ap5_2[3] = { 0x00, 0x21, 0x91 };
        static u8 ap5_3[3] = { 0x00, 0x24, 0x01 };
        static u8 ap5_4[3] = { 0x00, 0x15, 0xe9 };
        static u8 ap5_5[3] = { 0x00, 0x17, 0x9A };
        static u8 ap5_6[3] = { 0x00, 0x18, 0xE7 };
        static u8 ap6_1[3] = { 0x00, 0x17, 0x94 };
        static u8 ap7_1[3] = { 0x00, 0x14, 0xa4 };

        if (mac->opmode != NL80211_IFTYPE_STATION)
                return;

        if (mac->link_state == MAC80211_NOLINK) {
                mac->vendor = PEER_UNKNOWN;
                return;
        }

        if (mac->cnt_after_linked > 2)
                return;

        /* check if this really is a beacon */
        if (!ieee80211_is_beacon(hdr->frame_control))
                return;

        /* min. beacon length + FCS_LEN */
        if (len <= 40 + FCS_LEN)
                return;

        /* and only beacons from the associated BSSID, please */
        if (!ether_addr_equal(hdr->addr3, rtlpriv->mac80211.bssid))
                return;

        if (rtl_find_221_ie(hw, data, len))
                vendor = mac->vendor;

        if ((memcmp(mac->bssid, ap5_1, 3) == 0) ||
                (memcmp(mac->bssid, ap5_2, 3) == 0) ||
                (memcmp(mac->bssid, ap5_3, 3) == 0) ||
                (memcmp(mac->bssid, ap5_4, 3) == 0) ||
                (memcmp(mac->bssid, ap5_5, 3) == 0) ||
                (memcmp(mac->bssid, ap5_6, 3) == 0) ||
                vendor == PEER_ATH) {
                vendor = PEER_ATH;
                RT_TRACE(rtlpriv, COMP_MAC80211, DBG_LOUD, "=>ath find\n");
        } else if ((memcmp(mac->bssid, ap4_4, 3) == 0) ||
                (memcmp(mac->bssid, ap4_5, 3) == 0) ||
                (memcmp(mac->bssid, ap4_1, 3) == 0) ||
                (memcmp(mac->bssid, ap4_2, 3) == 0) ||
                (memcmp(mac->bssid, ap4_3, 3) == 0) ||
                vendor == PEER_RAL) {
                RT_TRACE(rtlpriv, COMP_MAC80211, DBG_LOUD, "=>ral find\n");
                vendor = PEER_RAL;
        } else if (memcmp(mac->bssid, ap6_1, 3) == 0 ||
                vendor == PEER_CISCO) {
                vendor = PEER_CISCO;
                RT_TRACE(rtlpriv, COMP_MAC80211, DBG_LOUD, "=>cisco find\n");
        } else if ((memcmp(mac->bssid, ap3_1, 3) == 0) ||
                (memcmp(mac->bssid, ap3_2, 3) == 0) ||
                (memcmp(mac->bssid, ap3_3, 3) == 0) ||
                vendor == PEER_BROAD) {
                RT_TRACE(rtlpriv, COMP_MAC80211, DBG_LOUD, "=>broad find\n");
                vendor = PEER_BROAD;
        } else if (memcmp(mac->bssid, ap7_1, 3) == 0 ||
                vendor == PEER_MARV) {
                vendor = PEER_MARV;
                RT_TRACE(rtlpriv, COMP_MAC80211, DBG_LOUD, "=>marv find\n");
        }

        mac->vendor = vendor;
}

/*********************************************************
 *
 * sysfs functions
 *
 *********************************************************/
static ssize_t rtl_show_debug_level(struct device *d,
                                    struct device_attribute *attr, char *buf)
{
        struct ieee80211_hw *hw = dev_get_drvdata(d);
        struct rtl_priv *rtlpriv = rtl_priv(hw);

        return sprintf(buf, "0x%08X\n", rtlpriv->dbg.global_debuglevel);
}

static ssize_t rtl_store_debug_level(struct device *d,
                                     struct device_attribute *attr,
                                     const char *buf, size_t count)
{
        struct ieee80211_hw *hw = dev_get_drvdata(d);
        struct rtl_priv *rtlpriv = rtl_priv(hw);
        unsigned long val;
        int ret;

        ret = strict_strtoul(buf, 0, &val);
        if (ret) {
                printk(KERN_DEBUG "%s is not in hex or decimal form.\n", buf);
        } else {
                rtlpriv->dbg.global_debuglevel = val;
                printk(KERN_DEBUG "debuglevel:%x\n",
                       rtlpriv->dbg.global_debuglevel);
        }

        return strnlen(buf, count);
}

static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
                   rtl_show_debug_level, rtl_store_debug_level);

static struct attribute *rtl_sysfs_entries[] = {

        &dev_attr_debug_level.attr,

        NULL
};

/*
 * "name" is folder name witch will be
 * put in device directory like :
 * sys/devices/pci0000:00/0000:00:1c.4/
 * 0000:06:00.0/rtl_sysfs
 */
struct attribute_group rtl_attribute_group = {
        .name = "rtlsysfs",
        .attrs = rtl_sysfs_entries,
};

MODULE_AUTHOR("lizhaoming       <chaoming_li@realsil.com.cn>");
MODULE_AUTHOR("Realtek WlanFAE  <wlanfae@realtek.com>");
MODULE_AUTHOR("Larry Finger     <Larry.FInger@lwfinger.net>");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Realtek 802.11n PCI wireless core");

static int __init rtl_core_module_init(void)
{
        if (rtl_rate_control_register())
                pr_err("Unable to register rtl_rc, use default RC !!\n");

        return 0;
}

static void __exit rtl_core_module_exit(void)
{
        /*RC*/
        rtl_rate_control_unregister();
}

module_init(rtl_core_module_init);
module_exit(rtl_core_module_exit);