// SPDX-License-Identifier: GPL-2.0

/*
 * As this function is mainly ported from Windows driver, so leave the name
 * little changed. If any confusion caused, tell me. Created by WB. 2008.05.08
 */
#include "ieee80211.h"

u8 MCS_FILTER_ALL[16] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x1f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};

u8 MCS_FILTER_1SS[16] = {0xff, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};

u16 MCS_DATA_RATE[2][2][77] = {
        {       {13, 26, 39, 52, 78, 104, 117, 130, 26, 52, 78, 104, 156, 208, 234, 260,
                 39, 78, 117, 234, 312, 351, 390, 52, 104, 156, 208, 312, 416, 468, 520,
                 0, 78, 104, 130, 117, 156, 195, 104, 130, 130, 156, 182, 182, 208, 156, 195,
                 195, 234, 273, 273, 312, 130, 156, 181, 156, 181, 208, 234, 208, 234, 260, 260,
                 286, 195, 234, 273, 234, 273, 312, 351, 312, 351, 390, 390, 429},                      // Long GI, 20MHz
                {14, 29, 43, 58, 87, 116, 130, 144, 29, 58, 87, 116, 173, 231, 260, 289,
                 43, 87, 130, 173, 260, 347, 390, 433, 58, 116, 173, 231, 347, 462, 520, 578,
                 0, 87, 116, 144, 130, 173, 217, 116, 144, 144, 173, 202, 202, 231, 173, 217,
                 217, 260, 303, 303, 347, 144, 173, 202, 173, 202, 231, 260, 231, 260, 289, 289,
                 318, 217, 260, 303, 260, 303, 347, 390, 347, 390, 433, 433, 477}       },              // Short GI, 20MHz
        {       {27, 54, 81, 108, 162, 216, 243, 270, 54, 108, 162, 216, 324, 432, 486, 540,
                 81, 162, 243, 324, 486, 648, 729, 810, 108, 216, 324, 432, 648, 864, 972, 1080,
                 12, 162, 216, 270, 243, 324, 405, 216, 270, 270, 324, 378, 378, 432, 324, 405,
                 405, 486, 567, 567, 648, 270, 324, 378, 324, 378, 432, 486, 432, 486, 540, 540,
                 594, 405, 486, 567, 486, 567, 648, 729, 648, 729, 810, 810, 891},      // Long GI, 40MHz
                {30, 60, 90, 120, 180, 240, 270, 300, 60, 120, 180, 240, 360, 480, 540, 600,
                 90, 180, 270, 360, 540, 720, 810, 900, 120, 240, 360, 480, 720, 960, 1080, 1200,
                 13, 180, 240, 300, 270, 360, 450, 240, 300, 300, 360, 420, 420, 480, 360, 450,
                 450, 540, 630, 630, 720, 300, 360, 420, 360, 420, 480, 540, 480, 540, 600, 600,
                 660, 450, 540, 630, 540, 630, 720, 810, 720, 810, 900, 900, 990}       }       // Short GI, 40MHz
};

static u8 UNKNOWN_BORADCOM[3] = {0x00, 0x14, 0xbf};
static u8 LINKSYSWRT330_LINKSYSWRT300_BROADCOM[3] = {0x00, 0x1a, 0x70};
static u8 LINKSYSWRT350_LINKSYSWRT150_BROADCOM[3] = {0x00, 0x1d, 0x7e};
static u8 NETGEAR834Bv2_BROADCOM[3] = {0x00, 0x1b, 0x2f};
static u8 BELKINF5D8233V1_RALINK[3] = {0x00, 0x17, 0x3f};       //cosa 03202008
static u8 BELKINF5D82334V3_RALINK[3] = {0x00, 0x1c, 0xdf};
static u8 PCI_RALINK[3] = {0x00, 0x90, 0xcc};
static u8 EDIMAX_RALINK[3] = {0x00, 0x0e, 0x2e};
static u8 AIRLINK_RALINK[3] = {0x00, 0x18, 0x02};
//static u8 DLINK_ATHEROS[3] = {0x00, 0x1c, 0xf0};
static u8 CISCO_BROADCOM[3] = {0x00, 0x17, 0x94};
/*
 * 2008/04/01 MH For Cisco G mode RX TP We need to change FW duration. Should we
 * put the code in other place??
 * static u8 WIFI_CISCO_G_AP[3] = {0x00, 0x40, 0x96};
 */
/*
 *function:  This function update default settings in pHTInfo structure
 *   input:  PRT_HIGH_THROUGHPUT        pHTInfo
 *  output:  none
 *  return:  none
 *  notice:  These value need be modified if any changes.
 */
void HTUpdateDefaultSetting(struct ieee80211_device *ieee)
{
        PRT_HIGH_THROUGHPUT     pHTInfo = ieee->pHTInfo;
        //const typeof( ((struct ieee80211_device *)0)->pHTInfo ) *__mptr = &pHTInfo;

        //printk("pHTinfo:%p, &pHTinfo:%p, mptr:%p,  offsetof:%x\n", pHTInfo, &pHTInfo, __mptr, offsetof(struct ieee80211_device, pHTInfo));
        //printk("===>ieee:%p,\n", ieee);
        // ShortGI support
        pHTInfo->bRegShortGI20MHz = 1;
        pHTInfo->bRegShortGI40MHz = 1;

        // 40MHz channel support
        pHTInfo->bRegBW40MHz = 1;

        // CCK rate support in 40MHz channel
        if (pHTInfo->bRegBW40MHz)
                pHTInfo->bRegSuppCCK = 1;
        else
                pHTInfo->bRegSuppCCK = true;

        // AMSDU related
        pHTInfo->nAMSDU_MaxSize = 7935UL;
        pHTInfo->bAMSDU_Support = 0;

        // AMPDU related
        pHTInfo->bAMPDUEnable = 1;
        pHTInfo->AMPDU_Factor = 2; //// 0: 2n13(8K), 1:2n14(16K), 2:2n15(32K), 3:2n16(64k)
        pHTInfo->MPDU_Density = 0;// 0: No restriction, 1: 1/8usec, 2: 1/4usec, 3: 1/2usec, 4: 1usec, 5: 2usec, 6: 4usec, 7:8usec

        // MIMO Power Save
        pHTInfo->SelfMimoPs = 3;// 0: Static Mimo Ps, 1: Dynamic Mimo Ps, 3: No Limitation, 2: Reserved(Set to 3 automatically.)
        if (pHTInfo->SelfMimoPs == 2)
                pHTInfo->SelfMimoPs = 3;
        // 8190 only. Assign rate operation mode to firmware
        ieee->bTxDisableRateFallBack = 0;
        ieee->bTxUseDriverAssingedRate = 0;

        /*
         * 8190 only, Realtek proprietary aggregation mode
         * Set MPDUDensity=2,   1: Set MPDUDensity=2(32k)  for Realtek AP and set MPDUDensity=0(8k) for others
         */
        pHTInfo->bRegRT2RTAggregation = 1;//0: Set MPDUDensity=2,   1: Set MPDUDensity=2(32k)  for Realtek AP and set MPDUDensity=0(8k) for others

        // For Rx Reorder Control
        pHTInfo->bRegRxReorderEnable = 1;
        pHTInfo->RxReorderWinSize = 64;
        pHTInfo->RxReorderPendingTime = 30;

#ifdef USB_TX_DRIVER_AGGREGATION_ENABLE
        pHTInfo->UsbTxAggrNum = 4;
#endif
#ifdef USB_RX_AGGREGATION_SUPPORT
        pHTInfo->UsbRxFwAggrEn = 1;
        pHTInfo->UsbRxFwAggrPageNum = 24;
        pHTInfo->UsbRxFwAggrPacketNum = 8;
        pHTInfo->UsbRxFwAggrTimeout = 16; ////usb rx FW aggregation timeout threshold.It's in units of 64us
#endif
}

/*
 *function:  This function print out each field on HT capability
 *           IE mainly from (Beacon/ProbeRsp/AssocReq)
 *   input:  u8*        CapIE       //Capability IE to be printed out
 *           u8*        TitleString //mainly print out caller function
 *  output:  none
 *  return:  none
 *  notice:  Driver should not print out this message by default.
 */
void HTDebugHTCapability(u8 *CapIE, u8 *TitleString)
{
        static u8                 EWC11NHTCap[] = {0x00, 0x90, 0x4c, 0x33};     // For 11n EWC definition, 2007.07.17, by Emily
        struct ht_capability_ele *pCapELE;

        if (!memcmp(CapIE, EWC11NHTCap, sizeof(EWC11NHTCap))) {
                //EWC IE
                IEEE80211_DEBUG(IEEE80211_DL_HT, "EWC IE in %s()\n", __func__);
                pCapELE = (struct ht_capability_ele *)(&CapIE[4]);
        } else {
                pCapELE = (struct ht_capability_ele *)(&CapIE[0]);
        }
        IEEE80211_DEBUG(IEEE80211_DL_HT, "<Log HT Capability>. Called by %s\n", TitleString);

        IEEE80211_DEBUG(IEEE80211_DL_HT,  "\tSupported Channel Width = %s\n", (pCapELE->ChlWidth) ? "20MHz" : "20/40MHz");
        IEEE80211_DEBUG(IEEE80211_DL_HT,  "\tSupport Short GI for 20M = %s\n", (pCapELE->ShortGI20Mhz) ? "YES" : "NO");
        IEEE80211_DEBUG(IEEE80211_DL_HT,  "\tSupport Short GI for 40M = %s\n", (pCapELE->ShortGI40Mhz) ? "YES" : "NO");
        IEEE80211_DEBUG(IEEE80211_DL_HT,  "\tSupport TX STBC = %s\n", (pCapELE->TxSTBC) ? "YES" : "NO");
        IEEE80211_DEBUG(IEEE80211_DL_HT,  "\tMax AMSDU Size = %s\n", (pCapELE->MaxAMSDUSize) ? "3839" : "7935");
        IEEE80211_DEBUG(IEEE80211_DL_HT,  "\tSupport CCK in 20/40 mode = %s\n", (pCapELE->DssCCk) ? "YES" : "NO");
        IEEE80211_DEBUG(IEEE80211_DL_HT,  "\tMax AMPDU Factor = %d\n", pCapELE->MaxRxAMPDUFactor);
        IEEE80211_DEBUG(IEEE80211_DL_HT,  "\tMPDU Density = %d\n", pCapELE->MPDUDensity);
        IEEE80211_DEBUG(IEEE80211_DL_HT,  "\tMCS Rate Set = [%x][%x][%x][%x][%x]\n", pCapELE->MCS[0],\
                                pCapELE->MCS[1], pCapELE->MCS[2], pCapELE->MCS[3], pCapELE->MCS[4]);
}

/*
 *function:  This function print out each field on HT Information
 *           IE mainly from (Beacon/ProbeRsp)
 *   input:  u8*        InfoIE       //Capability IE to be printed out
 *           u8*        TitleString //mainly print out caller function
 *  output:  none
 *  return:  none
 *  notice:  Driver should not print out this message by default.
 */
void HTDebugHTInfo(u8 *InfoIE, u8 *TitleString)
{
        static u8       EWC11NHTInfo[] = {0x00, 0x90, 0x4c, 0x34};      // For 11n EWC definition, 2007.07.17, by Emily
        PHT_INFORMATION_ELE             pHTInfoEle;

        if (!memcmp(InfoIE, EWC11NHTInfo, sizeof(EWC11NHTInfo))) {
                // Not EWC IE
                IEEE80211_DEBUG(IEEE80211_DL_HT, "EWC IE in %s()\n", __func__);
                pHTInfoEle = (PHT_INFORMATION_ELE)(&InfoIE[4]);
        } else {
                pHTInfoEle = (PHT_INFORMATION_ELE)(&InfoIE[0]);
        }

        IEEE80211_DEBUG(IEEE80211_DL_HT, "<Log HT Information Element>. Called by %s\n", TitleString);

        IEEE80211_DEBUG(IEEE80211_DL_HT, "\tPrimary channel = %d\n", pHTInfoEle->ControlChl);
        IEEE80211_DEBUG(IEEE80211_DL_HT, "\tSecondary channel =");
        switch (pHTInfoEle->ExtChlOffset) {
        case 0:
                IEEE80211_DEBUG(IEEE80211_DL_HT, "Not Present\n");
                break;
        case 1:
                IEEE80211_DEBUG(IEEE80211_DL_HT, "Upper channel\n");
                break;
        case 2:
                IEEE80211_DEBUG(IEEE80211_DL_HT, "Reserved. Eooro!!!\n");
                break;
        case 3:
                IEEE80211_DEBUG(IEEE80211_DL_HT, "Lower Channel\n");
                break;
        }
        IEEE80211_DEBUG(IEEE80211_DL_HT, "\tRecommended channel width = %s\n", (pHTInfoEle->RecommemdedTxWidth) ? "20Mhz" : "40Mhz");

        IEEE80211_DEBUG(IEEE80211_DL_HT, "\tOperation mode for protection = ");
        switch (pHTInfoEle->OptMode) {
        case 0:
                IEEE80211_DEBUG(IEEE80211_DL_HT, "No Protection\n");
                break;
        case 1:
                IEEE80211_DEBUG(IEEE80211_DL_HT, "HT non-member protection mode\n");
                break;
        case 2:
                IEEE80211_DEBUG(IEEE80211_DL_HT, "Suggest to open protection\n");
                break;
        case 3:
                IEEE80211_DEBUG(IEEE80211_DL_HT, "HT mixed mode\n");
                break;
        }

        IEEE80211_DEBUG(IEEE80211_DL_HT, "\tBasic MCS Rate Set = [%x][%x][%x][%x][%x]\n", pHTInfoEle->BasicMSC[0],\
                                pHTInfoEle->BasicMSC[1], pHTInfoEle->BasicMSC[2], pHTInfoEle->BasicMSC[3], pHTInfoEle->BasicMSC[4]);
}

static u16 HTMcsToDataRate(struct ieee80211_device *ieee, u8 nMcsRate)
{
        PRT_HIGH_THROUGHPUT     pHTInfo = ieee->pHTInfo;

        u8      is40MHz = (pHTInfo->bCurBW40MHz) ? 1 : 0;
        u8      isShortGI = (pHTInfo->bCurBW40MHz) ?
                                                ((pHTInfo->bCurShortGI40MHz) ? 1 : 0) :
                                                ((pHTInfo->bCurShortGI20MHz) ? 1 : 0);
        return MCS_DATA_RATE[is40MHz][isShortGI][(nMcsRate & 0x7f)];
}

/*
 *function:  This function returns current datarate.
 *   input:  struct ieee80211_device*   ieee
 *           u8                         nDataRate
 *  output:  none
 *  return:  tx rate
 *  notice:  quite unsure about how to use this function //wb
 */
u16  TxCountToDataRate(struct ieee80211_device *ieee, u8 nDataRate)
{
        //PRT_HIGH_THROUGHPUT   pHTInfo = ieee->pHTInfo;
        u16             CCKOFDMRate[12] = {0x02, 0x04, 0x0b, 0x16, 0x0c, 0x12, 0x18, 0x24, 0x30, 0x48, 0x60, 0x6c};
        u8      is40MHz = 0;
        u8      isShortGI = 0;

        if (nDataRate < 12) {
                return CCKOFDMRate[nDataRate];
        } else {
                if (nDataRate >= 0x10 && nDataRate <= 0x1f) { //if(nDataRate > 11 && nDataRate < 28 )
                        is40MHz = 0;
                        isShortGI = 0;

                      // nDataRate = nDataRate - 12;
                } else if (nDataRate >= 0x20  && nDataRate <= 0x2f) { //(27, 44)
                        is40MHz = 1;
                        isShortGI = 0;

                        //nDataRate = nDataRate - 28;
                } else if (nDataRate >= 0x30  && nDataRate <= 0x3f) { //(43, 60)
                        is40MHz = 0;
                        isShortGI = 1;

                        //nDataRate = nDataRate - 44;
                } else if (nDataRate >= 0x40  && nDataRate <= 0x4f) { //(59, 76)
                        is40MHz = 1;
                        isShortGI = 1;

                        //nDataRate = nDataRate - 60;
                }
                return MCS_DATA_RATE[is40MHz][isShortGI][nDataRate & 0xf];
        }
}

bool IsHTHalfNmodeAPs(struct ieee80211_device *ieee)
{
        bool                    retValue = false;
        struct ieee80211_network *net = &ieee->current_network;

        if ((memcmp(net->bssid, BELKINF5D8233V1_RALINK, 3) == 0) ||
            (memcmp(net->bssid, BELKINF5D82334V3_RALINK, 3) == 0) ||
            (memcmp(net->bssid, PCI_RALINK, 3) == 0) ||
            (memcmp(net->bssid, EDIMAX_RALINK, 3) == 0) ||
            (memcmp(net->bssid, AIRLINK_RALINK, 3) == 0) ||
            (net->ralink_cap_exist))
                retValue = true;
        else if ((memcmp(net->bssid, UNKNOWN_BORADCOM, 3) == 0) ||
                 (memcmp(net->bssid, LINKSYSWRT330_LINKSYSWRT300_BROADCOM, 3) == 0) ||
                 (memcmp(net->bssid, LINKSYSWRT350_LINKSYSWRT150_BROADCOM, 3) == 0) ||
                 (memcmp(net->bssid, NETGEAR834Bv2_BROADCOM, 3) == 0) ||
                 (net->broadcom_cap_exist))
                retValue = true;
        else if (net->bssht.bdRT2RTAggregation)
                retValue = true;
        else
                retValue = false;

        return retValue;
}

/*
 *function:  This function returns peer IOT.
 *   input:  struct ieee80211_device*   ieee
 *  output:  none
 *  return:
 *  notice:
 */
static void HTIOTPeerDetermine(struct ieee80211_device *ieee)
{
        PRT_HIGH_THROUGHPUT     pHTInfo = ieee->pHTInfo;
        struct ieee80211_network *net = &ieee->current_network;

        if (net->bssht.bdRT2RTAggregation)
                pHTInfo->IOTPeer = HT_IOT_PEER_REALTEK;
        else if (net->broadcom_cap_exist)
                pHTInfo->IOTPeer = HT_IOT_PEER_BROADCOM;
        else if ((memcmp(net->bssid, UNKNOWN_BORADCOM, 3) == 0) ||
                 (memcmp(net->bssid, LINKSYSWRT330_LINKSYSWRT300_BROADCOM, 3) == 0) ||
                 (memcmp(net->bssid, LINKSYSWRT350_LINKSYSWRT150_BROADCOM, 3) == 0) ||
                 (memcmp(net->bssid, NETGEAR834Bv2_BROADCOM, 3) == 0))
                pHTInfo->IOTPeer = HT_IOT_PEER_BROADCOM;
        else if ((memcmp(net->bssid, BELKINF5D8233V1_RALINK, 3) == 0) ||
                 (memcmp(net->bssid, BELKINF5D82334V3_RALINK, 3) == 0) ||
                 (memcmp(net->bssid, PCI_RALINK, 3) == 0) ||
                 (memcmp(net->bssid, EDIMAX_RALINK, 3) == 0) ||
                 (memcmp(net->bssid, AIRLINK_RALINK, 3) == 0) ||
                 net->ralink_cap_exist)
                pHTInfo->IOTPeer = HT_IOT_PEER_RALINK;
        else if (net->atheros_cap_exist)
                pHTInfo->IOTPeer = HT_IOT_PEER_ATHEROS;
        else if (memcmp(net->bssid, CISCO_BROADCOM, 3) == 0)
                pHTInfo->IOTPeer = HT_IOT_PEER_CISCO;
        else
                pHTInfo->IOTPeer = HT_IOT_PEER_UNKNOWN;

        IEEE80211_DEBUG(IEEE80211_DL_IOT, "Joseph debug!! IOTPEER: %x\n", pHTInfo->IOTPeer);
}

/*
 *function:  Check whether driver should declare received rate up to MCS13
 *           only since some chipset is not good at receiving MCS14~15 frame
 *           from some AP.
 *   input:  struct ieee80211_device*   ieee
 *           u8 *                       PeerMacAddr
 *  output:  none
 *  return:  return 1 if driver should declare MCS13 only(otherwise return 0)
 */
static u8 HTIOTActIsDisableMCS14(struct ieee80211_device *ieee, u8 *PeerMacAddr)
{
        return 0;
}

/*
 * Function:    HTIOTActIsDisableMCS15
 *
 * Overview:    Check whether driver should declare capability of receiving
 *              MCS15
 *
 * Input:
 *                      PADAPTER                Adapter,
 *
 * Output:              None
 * Return:      true if driver should disable MCS15
 * 2008.04.15   Emily
 */
static bool HTIOTActIsDisableMCS15(struct ieee80211_device *ieee)
{
        bool retValue = false;

#ifdef TODO
        // Apply for 819u only
#if (HAL_CODE_BASE == RTL8192)

#if (DEV_BUS_TYPE == USB_INTERFACE)
        // Alway disable MCS15 by Jerry Chang's request.by Emily, 2008.04.15
        retValue = true;
#elif (DEV_BUS_TYPE == PCI_INTERFACE)
        // Enable MCS15 if the peer is Cisco AP. by Emily, 2008.05.12
//      if(pBssDesc->bCiscoCapExist)
//              retValue = false;
//      else
                retValue = false;
#endif
#endif
#endif
        // Jerry Chang suggest that 8190 1x2 does not need to disable MCS15

        return retValue;
}

/*
 * Function:    HTIOTActIsDisableMCSTwoSpatialStream
 *
 * Overview:    Check whether driver should declare capability of receiving
 *              All 2 ss packets
 *
 * Input:
 *                      PADAPTER                Adapter,
 *
 * Output:              None
 * Return:      true if driver should disable all two spatial stream packet
 * 2008.04.21   Emily
 */
static bool HTIOTActIsDisableMCSTwoSpatialStream(struct ieee80211_device *ieee,
                                                 u8 *PeerMacAddr)
{
#ifdef TODO
        // Apply for 819u only
#endif
        return false;
}

/*
 *function:  Check whether driver should disable EDCA turbo mode
 *   input:  struct ieee80211_device*   ieee
 *           u8*                        PeerMacAddr
 *  output:  none
 *  return:  return 1 if driver should disable EDCA turbo mode
 *           (otherwise return 0)
 */
static u8 HTIOTActIsDisableEDCATurbo(struct ieee80211_device *ieee,
                                     u8 *PeerMacAddr)
{       /* default enable EDCA Turbo mode. */
        return false;
}

/*
 *function:  Check whether we need to use OFDM to sned MGNT frame for
 *           broadcom AP
 *   input:  struct ieee80211_network *network   //current network we live
 *  output:  none
 *  return:  return 1 if true
 */
static u8 HTIOTActIsMgntUseCCK6M(struct ieee80211_network *network)
{
        u8      retValue = 0;

        // 2008/01/25 MH Judeg if we need to use OFDM to sned MGNT frame for broadcom AP.
        // 2008/01/28 MH We must prevent that we select null bssid to link.

        if (network->broadcom_cap_exist)
                retValue = 1;

        return retValue;
}

static u8 HTIOTActIsCCDFsync(u8 *PeerMacAddr)
{
        u8      retValue = 0;

        if ((memcmp(PeerMacAddr, UNKNOWN_BORADCOM, 3) == 0) ||
            (memcmp(PeerMacAddr, LINKSYSWRT330_LINKSYSWRT300_BROADCOM, 3) == 0) ||
            (memcmp(PeerMacAddr, LINKSYSWRT350_LINKSYSWRT150_BROADCOM, 3) == 0))
                retValue = 1;

        return retValue;
}

void HTResetIOTSetting(PRT_HIGH_THROUGHPUT pHTInfo)
{
        pHTInfo->IOTAction = 0;
        pHTInfo->IOTPeer = HT_IOT_PEER_UNKNOWN;
}

/*
 *function:  Construct Capablility Element in Beacon... if HTEnable is turned on
 *   input:  struct ieee80211_device*   ieee
 *           u8*                     posHTCap //pointer to store Capability Ele
 *           u8*                     len //store length of CE
 *           u8                      IsEncrypt //whether encrypt, needed further
 *  output:  none
 *  return:  none
 *  notice:  posHTCap can't be null and should be initialized before.
 */
void HTConstructCapabilityElement(struct ieee80211_device *ieee, u8 *posHTCap, u8 *len, u8 IsEncrypt)
{
        PRT_HIGH_THROUGHPUT     pHT = ieee->pHTInfo;
        struct ht_capability_ele   *pCapELE = NULL;
        //u8 bIsDeclareMCS13;

        if (!posHTCap || !pHT) {
                IEEE80211_DEBUG(IEEE80211_DL_ERR,
                                "posHTCap or pHTInfo can't be null in %s\n",
                                __func__);
                return;
        }
        memset(posHTCap, 0, *len);
        if (pHT->ePeerHTSpecVer == HT_SPEC_VER_EWC) {
                u8      EWC11NHTCap[] = {0x00, 0x90, 0x4c, 0x33};       // For 11n EWC definition, 2007.07.17, by Emily

                memcpy(posHTCap, EWC11NHTCap, sizeof(EWC11NHTCap));
                pCapELE = (struct ht_capability_ele *)&posHTCap[4];
        } else {
                pCapELE = (struct ht_capability_ele *)posHTCap;
        }

        //HT capability info
        pCapELE->AdvCoding              = 0; // This feature is not supported now!!
        if (ieee->GetHalfNmodeSupportByAPsHandler(ieee->dev))
                pCapELE->ChlWidth = 0;
        else
                pCapELE->ChlWidth = (pHT->bRegBW40MHz ? 1 : 0);

//      pCapELE->ChlWidth               = (pHT->bRegBW40MHz?1:0);
        pCapELE->MimoPwrSave            = pHT->SelfMimoPs;
        pCapELE->GreenField             = 0; // This feature is not supported now!!
        pCapELE->ShortGI20Mhz           = 1; // We can receive Short GI!!
        pCapELE->ShortGI40Mhz           = 1; // We can receive Short GI!!
        //DbgPrint("TX HT cap/info ele BW=%d SG20=%d SG40=%d\n\r",
        //pCapELE->ChlWidth, pCapELE->ShortGI20Mhz, pCapELE->ShortGI40Mhz);
        pCapELE->TxSTBC                 = 1;
        pCapELE->RxSTBC                 = 0;
        pCapELE->DelayBA                = 0;    // Do not support now!!
        pCapELE->MaxAMSDUSize           = (MAX_RECEIVE_BUFFER_SIZE >= 7935) ? 1 : 0;
        pCapELE->DssCCk                 = ((pHT->bRegBW40MHz) ? (pHT->bRegSuppCCK ? 1 : 0) : 0);
        pCapELE->PSMP                   = 0; // Do not support now!!
        pCapELE->LSigTxopProtect        = 0; // Do not support now!!

        /*
         * MAC HT parameters info
         * TODO: Nedd to take care of this part
         */
        IEEE80211_DEBUG(IEEE80211_DL_HT, "TX HT cap/info ele BW=%d MaxAMSDUSize:%d DssCCk:%d\n", pCapELE->ChlWidth, pCapELE->MaxAMSDUSize, pCapELE->DssCCk);

        if (IsEncrypt) {
                pCapELE->MPDUDensity    = 7; // 8us
                pCapELE->MaxRxAMPDUFactor = 2; // 2 is for 32 K and 3 is 64K
        } else {
                pCapELE->MaxRxAMPDUFactor = 3; // 2 is for 32 K and 3 is 64K
                pCapELE->MPDUDensity    = 0; // no density
        }

        //Supported MCS set
        memcpy(pCapELE->MCS, ieee->Regdot11HTOperationalRateSet, 16);
        if (pHT->IOTAction & HT_IOT_ACT_DISABLE_MCS15)
                pCapELE->MCS[1] &= 0x7f;

        if (pHT->IOTAction & HT_IOT_ACT_DISABLE_MCS14)
                pCapELE->MCS[1] &= 0xbf;

        if (pHT->IOTAction & HT_IOT_ACT_DISABLE_ALL_2SS)
                pCapELE->MCS[1] &= 0x00;

        /*
         * 2008.06.12
         * For RTL819X, if pairwisekey = wep/tkip, ap is ralink, we support only MCS0~7.
         */
        if (ieee->GetHalfNmodeSupportByAPsHandler(ieee->dev)) {
                int i;

                for (i = 1; i < 16; i++)
                        pCapELE->MCS[i] = 0;
        }

        //Extended HT Capability Info
        memset(&pCapELE->ExtHTCapInfo, 0, 2);

        //TXBF Capabilities
        memset(pCapELE->TxBFCap, 0, 4);

        //Antenna Selection Capabilities
        pCapELE->ASCap = 0;
//add 2 to give space for element ID and len when construct frames
        if (pHT->ePeerHTSpecVer == HT_SPEC_VER_EWC)
                *len = 30 + 2;
        else
                *len = 26 + 2;

//      IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA | IEEE80211_DL_HT, posHTCap, *len -2);

        /*
         * Print each field in detail. Driver should not print out this message
         * by default
         */
//      HTDebugHTCapability(posHTCap, (u8*)"HTConstructCapability()");
}

/*
 *function:  Construct Information Element in Beacon... if HTEnable is turned on
 *   input:  struct ieee80211_device*   ieee
 *           u8*                     posHTCap //pointer to store Information Ele
 *           u8*                     len   //store len of
 *           u8                      IsEncrypt //whether encrypt, needed further
 *  output:  none
 *  return:  none
 *  notice:  posHTCap can't be null and be initialized before.
 *           Only AP and IBSS sta should do this
 */
void HTConstructInfoElement(struct ieee80211_device *ieee, u8 *posHTInfo, u8 *len, u8 IsEncrypt)
{
        PRT_HIGH_THROUGHPUT     pHT = ieee->pHTInfo;
        PHT_INFORMATION_ELE             pHTInfoEle = (PHT_INFORMATION_ELE)posHTInfo;

        if (!posHTInfo || !pHTInfoEle) {
                IEEE80211_DEBUG(IEEE80211_DL_ERR,
                                "posHTInfo or pHTInfoEle can't be null in %s\n",
                                __func__);
                return;
        }

        memset(posHTInfo, 0, *len);
        if ((ieee->iw_mode == IW_MODE_ADHOC) || (ieee->iw_mode == IW_MODE_MASTER)) { //ap mode is not currently supported
                pHTInfoEle->ControlChl                  = ieee->current_network.channel;
                pHTInfoEle->ExtChlOffset                = ((!pHT->bRegBW40MHz) ? HT_EXTCHNL_OFFSET_NO_EXT :
                                                                                        (ieee->current_network.channel <= 6) ?
                                                                                                HT_EXTCHNL_OFFSET_UPPER : HT_EXTCHNL_OFFSET_LOWER);
                pHTInfoEle->RecommemdedTxWidth  = pHT->bRegBW40MHz;
                pHTInfoEle->RIFS                                        = 0;
                pHTInfoEle->PSMPAccessOnly              = 0;
                pHTInfoEle->SrvIntGranularity           = 0;
                pHTInfoEle->OptMode                             = pHT->CurrentOpMode;
                pHTInfoEle->NonGFDevPresent             = 0;
                pHTInfoEle->DualBeacon                  = 0;
                pHTInfoEle->SecondaryBeacon             = 0;
                pHTInfoEle->LSigTxopProtectFull         = 0;
                pHTInfoEle->PcoActive                           = 0;
                pHTInfoEle->PcoPhase                            = 0;

                memset(pHTInfoEle->BasicMSC, 0, 16);

                *len = 22 + 2; //same above
        } else {
                //STA should not generate High Throughput Information Element
                *len = 0;
        }
        //IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA | IEEE80211_DL_HT, posHTInfo, *len - 2);
        //HTDebugHTInfo(posHTInfo, "HTConstructInforElement");
}

/*
 * According to experiment, Realtek AP to STA (based on rtl8190) may achieve
 * best performance if both STA and AP set limitation of aggregation size to
 * 32K, that is, set AMPDU density to 2 (Ref: IEEE 11n specification).
 * However, if Realtek STA associates to other AP, STA should set limitation of
 * aggregation size to 8K, otherwise, performance of traffic stream from STA to
 * AP will be much less than the traffic stream from AP to STA if both of the
 * stream runs concurrently at the same time.
 *
 *  Frame Format
 *  Element ID          Length          OUI             Type1           Reserved
 *  1 byte              1 byte          3 bytes         1 byte          1 byte
 *
 *  OUI         = 0x00, 0xe0, 0x4c,
 *  Type        = 0x02
 *  Reserved    = 0x00
 *
 *  2007.8.21 by Emily
 */
/*
 *function:  Construct  Information Element in Beacon... in RT2RT condition
 *   input:  struct ieee80211_device*   ieee
 *           u8*                  posRT2RTAgg //pointer to store Information Ele
 *           u8*                  len   //store len
 *  output:  none
 *  return:  none
 *  notice:
 */
void HTConstructRT2RTAggElement(struct ieee80211_device *ieee, u8 *posRT2RTAgg, u8 *len)
{
        if (!posRT2RTAgg) {
                IEEE80211_DEBUG(IEEE80211_DL_ERR,
                                "posRT2RTAgg can't be null in %s\n",
                                __func__);
                return;
        }
        memset(posRT2RTAgg, 0, *len);
        *posRT2RTAgg++ = 0x00;
        *posRT2RTAgg++ = 0xe0;
        *posRT2RTAgg++ = 0x4c;
        *posRT2RTAgg++ = 0x02;
        *posRT2RTAgg++ = 0x01;
        *posRT2RTAgg = 0x10;//*posRT2RTAgg = 0x02;

        if (ieee->bSupportRemoteWakeUp)
                *posRT2RTAgg |= 0x08;//RT_HT_CAP_USE_WOW;

        *len = 6 + 2;
        return;
#ifdef TODO
#if (HAL_CODE_BASE == RTL8192 && DEV_BUS_TYPE == USB_INTERFACE)
        /*
        //Emily. If it is required to Ask Realtek AP to send AMPDU during AES mode, enable this
           section of code.
        if(IS_UNDER_11N_AES_MODE(Adapter))
        {
                posRT2RTAgg->octet[5] |= RT_HT_CAP_USE_AMPDU;
        }else
        {
                posRT2RTAgg->octet[5] &= 0xfb;
        }
        */
#else
        // Do Nothing
#endif

        posRT2RTAgg->Length = 6;
#endif
}

/*
 *function:  Pick the right Rate Adaptive table to use
 *   input:  struct ieee80211_device*   ieee
 *           u8*                      pOperateMCS //A pointer to MCS rate bitmap
 *  return:  always we return true
 *  notice:
 */
static u8 HT_PickMCSRate(struct ieee80211_device *ieee, u8 *pOperateMCS)
{
        if (!pOperateMCS) {
                IEEE80211_DEBUG(IEEE80211_DL_ERR,
                                "pOperateMCS can't be null in %s\n",
                                __func__);
                return false;
        }

        switch (ieee->mode) {
        case IEEE_A:
        case IEEE_B:
        case IEEE_G:
                //legacy rate routine handled at selectedrate

                //no MCS rate
                memset(pOperateMCS, 0, 16);
                break;

        case IEEE_N_24G:        //assume CCK rate ok
        case IEEE_N_5G:
                // Legacy part we only use 6, 5.5,2,1 for N_24G and 6 for N_5G.
                // Legacy part shall be handled at SelectRateSet().

                //HT part
                // TODO: may be different if we have different number of antenna
                pOperateMCS[0] &= RATE_ADPT_1SS_MASK;   //support MCS 0~7
                pOperateMCS[1] &= RATE_ADPT_2SS_MASK;
                pOperateMCS[3] &= RATE_ADPT_MCS32_MASK;
                break;

        //should never reach here
        default:
                break;
        }

        return true;
}

/*
 *      Description:
 *              This function will get the highest speed rate in input MCS set.
 *
 *      /param  Adapter                 Pionter to Adapter entity
 *                      pMCSRateSet             Pointer to MCS rate bitmap
 *                      pMCSFilter              Pointer to MCS rate filter
 *
 *      /return Highest MCS rate included in pMCSRateSet and filtered by pMCSFilter.
 *
 */
/*
 *function:  This function will get the highest speed rate in input MCS set.
 *   input:  struct ieee80211_device*   ieee
 *           u8*                        pMCSRateSet //Pointer to MCS rate bitmap
 *           u8*                        pMCSFilter //Pointer to MCS rate filter
 *  return:  Highest MCS rate included in pMCSRateSet and filtered by pMCSFilter
 *  notice:
 */
u8 HTGetHighestMCSRate(struct ieee80211_device *ieee, u8 *pMCSRateSet, u8 *pMCSFilter)
{
        u8              i, j;
        u8              bitMap;
        u8              mcsRate = 0;
        u8              availableMcsRate[16];

        if (!pMCSRateSet || !pMCSFilter) {
                IEEE80211_DEBUG(IEEE80211_DL_ERR,
                                "pMCSRateSet or pMCSFilter can't be null in %s\n",
                                __func__);
                return false;
        }
        for (i = 0; i < 16; i++)
                availableMcsRate[i] = pMCSRateSet[i] & pMCSFilter[i];

        for (i = 0; i < 16; i++) {
                if (availableMcsRate[i] != 0)
                        break;
        }
        if (i == 16)
                return false;

        for (i = 0; i < 16; i++) {
                if (availableMcsRate[i] != 0) {
                        bitMap = availableMcsRate[i];
                        for (j = 0; j < 8; j++) {
                                if ((bitMap % 2) != 0) {
                                        if (HTMcsToDataRate(ieee, (8 * i + j)) > HTMcsToDataRate(ieee, mcsRate))
                                                mcsRate = (8 * i + j);
                                }
                                bitMap >>= 1;
                        }
                }
        }
        return (mcsRate | 0x80);
}

/*
 * 1.Filter our operation rate set with AP's rate set
 * 2.shall reference channel bandwidth, STBC, Antenna number
 * 3.generate rate adative table for firmware
 * David 20060906
 *
 * \pHTSupportedCap: the connected STA's supported rate Capability element
 */
static u8 HTFilterMCSRate(struct ieee80211_device *ieee, u8 *pSupportMCS,
                          u8 *pOperateMCS)
{
        u8 i = 0;

        // filter out operational rate set not supported by AP, the length of it is 16
        for (i = 0; i <= 15; i++)
                pOperateMCS[i] = ieee->Regdot11HTOperationalRateSet[i] & pSupportMCS[i];

        // TODO: adjust our operational rate set  according to our channel bandwidth, STBC and Antenna number
        /*
         * TODO: fill suggested rate adaptive rate index and give firmware info
         * using Tx command packet we also shall suggested the first start rate
         * set according to our signal strength
         */
        HT_PickMCSRate(ieee, pOperateMCS);

        // For RTL819X, if pairwisekey = wep/tkip, we support only MCS0~7.
        if (ieee->GetHalfNmodeSupportByAPsHandler(ieee->dev))
                pOperateMCS[1] = 0;

        /*
         * For RTL819X, we support only MCS0~15.
         * And also, we do not know how to use MCS32 now.
         */
        for (i = 2; i <= 15; i++)
                pOperateMCS[i] = 0;

        return true;
}

void HTOnAssocRsp(struct ieee80211_device *ieee)
{
        PRT_HIGH_THROUGHPUT     pHTInfo = ieee->pHTInfo;
        struct ht_capability_ele       *pPeerHTCap = NULL;
        PHT_INFORMATION_ELE             pPeerHTInfo = NULL;
        u16     nMaxAMSDUSize = 0;
        u8      *pMcsFilter = NULL;

        static u8                               EWC11NHTCap[] = {0x00, 0x90, 0x4c, 0x33};               // For 11n EWC definition, 2007.07.17, by Emily
        static u8                               EWC11NHTInfo[] = {0x00, 0x90, 0x4c, 0x34};      // For 11n EWC definition, 2007.07.17, by Emily

        if (!pHTInfo->bCurrentHTSupport) {
                IEEE80211_DEBUG(IEEE80211_DL_ERR,
                                "<=== %s: HT_DISABLE\n",
                                __func__);
                return;
        }
        IEEE80211_DEBUG(IEEE80211_DL_HT, "===> HTOnAssocRsp_wq(): HT_ENABLE\n");
//      IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA, pHTInfo->PeerHTCapBuf, sizeof(struct ht_capability_ele));
//      IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA, pHTInfo->PeerHTInfoBuf, sizeof(HT_INFORMATION_ELE));

//      HTDebugHTCapability(pHTInfo->PeerHTCapBuf,"HTOnAssocRsp_wq");
//      HTDebugHTInfo(pHTInfo->PeerHTInfoBuf,"HTOnAssocRsp_wq");
        //
        if (!memcmp(pHTInfo->PeerHTCapBuf, EWC11NHTCap, sizeof(EWC11NHTCap)))
                pPeerHTCap = (struct ht_capability_ele *)(&pHTInfo->PeerHTCapBuf[4]);
        else
                pPeerHTCap = (struct ht_capability_ele *)(pHTInfo->PeerHTCapBuf);

        if (!memcmp(pHTInfo->PeerHTInfoBuf, EWC11NHTInfo, sizeof(EWC11NHTInfo)))
                pPeerHTInfo = (PHT_INFORMATION_ELE)(&pHTInfo->PeerHTInfoBuf[4]);
        else
                pPeerHTInfo = (PHT_INFORMATION_ELE)(pHTInfo->PeerHTInfoBuf);

        ////////////////////////////////////////////////////////
        // Configurations:
        ////////////////////////////////////////////////////////
        IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA | IEEE80211_DL_HT, pPeerHTCap, sizeof(struct ht_capability_ele));
//      IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA|IEEE80211_DL_HT, pPeerHTInfo, sizeof(HT_INFORMATION_ELE));
        // Config Supported Channel Width setting
        //
        HTSetConnectBwMode(ieee, (enum ht_channel_width)(pPeerHTCap->ChlWidth), (enum ht_extension_chan_offset)(pPeerHTInfo->ExtChlOffset));

        pHTInfo->bCurTxBW40MHz = (pPeerHTInfo->RecommemdedTxWidth == 1);

        /*
         * Update short GI/ long GI setting
         *
         * TODO:
         */
        pHTInfo->bCurShortGI20MHz = pHTInfo->bRegShortGI20MHz &&
                                    (pPeerHTCap->ShortGI20Mhz == 1);
        pHTInfo->bCurShortGI40MHz = pHTInfo->bRegShortGI40MHz &&
                                   (pPeerHTCap->ShortGI40Mhz == 1);

        /*
         * Config TX STBC setting
         *
         * TODO:
         */

        /*
         * Config DSSS/CCK  mode in 40MHz mode
         *
         * TODO:
         */
        pHTInfo->bCurSuppCCK = pHTInfo->bRegSuppCCK &&
                               (pPeerHTCap->DssCCk == 1);

        /*
         * Config and configure A-MSDU setting
         */
        pHTInfo->bCurrent_AMSDU_Support = pHTInfo->bAMSDU_Support;

        nMaxAMSDUSize = (pPeerHTCap->MaxAMSDUSize == 0) ? 3839 : 7935;

        if (pHTInfo->nAMSDU_MaxSize > nMaxAMSDUSize)
                pHTInfo->nCurrent_AMSDU_MaxSize = nMaxAMSDUSize;
        else
                pHTInfo->nCurrent_AMSDU_MaxSize = pHTInfo->nAMSDU_MaxSize;
        /*
         * Config A-MPDU setting
         */
        pHTInfo->bCurrentAMPDUEnable = pHTInfo->bAMPDUEnable;

        /*
         * <1> Decide AMPDU Factor
         * By Emily
         */
        if (!pHTInfo->bRegRT2RTAggregation) {
                // Decide AMPDU Factor according to protocol handshake
                if (pHTInfo->AMPDU_Factor > pPeerHTCap->MaxRxAMPDUFactor)
                        pHTInfo->CurrentAMPDUFactor = pPeerHTCap->MaxRxAMPDUFactor;
                else
                        pHTInfo->CurrentAMPDUFactor = pHTInfo->AMPDU_Factor;
        } else {
                /*
                 * Set MPDU density to 2 to Realtek AP, and set it to 0 for others
                 * Replace MPDU factor declared in original association response frame format. 2007.08.20 by Emily
                 */
                if (ieee->current_network.bssht.bdRT2RTAggregation) {
                        if (ieee->pairwise_key_type != KEY_TYPE_NA)
                                // Realtek may set 32k in security mode and 64k for others
                                pHTInfo->CurrentAMPDUFactor = pPeerHTCap->MaxRxAMPDUFactor;
                        else
                                pHTInfo->CurrentAMPDUFactor = HT_AGG_SIZE_64K;
                } else {
                        if (pPeerHTCap->MaxRxAMPDUFactor < HT_AGG_SIZE_32K)
                                pHTInfo->CurrentAMPDUFactor = pPeerHTCap->MaxRxAMPDUFactor;
                        else
                                pHTInfo->CurrentAMPDUFactor = HT_AGG_SIZE_32K;
                }
        }

        /*
         * <2> Set AMPDU Minimum MPDU Start Spacing
         * 802.11n 3.0 section 9.7d.3
         */
        if (pHTInfo->MPDU_Density > pPeerHTCap->MPDUDensity)
                pHTInfo->CurrentMPDUDensity = pHTInfo->MPDU_Density;
        else
                pHTInfo->CurrentMPDUDensity = pPeerHTCap->MPDUDensity;
        if (ieee->pairwise_key_type != KEY_TYPE_NA)
                pHTInfo->CurrentMPDUDensity     = 7; // 8us
        // Force TX AMSDU

        // Lanhsin: mark for tmp to avoid deauth by ap from  s3
        //if(memcmp(pMgntInfo->Bssid, NETGEAR834Bv2_BROADCOM, 3)==0)
        if (0) {
                pHTInfo->bCurrentAMPDUEnable = false;
                pHTInfo->ForcedAMSDUMode = HT_AGG_FORCE_ENABLE;
                pHTInfo->ForcedAMSDUMaxSize = 7935;

                pHTInfo->IOTAction |=  HT_IOT_ACT_TX_USE_AMSDU_8K;
        }

        // Rx Reorder Setting
        pHTInfo->bCurRxReorderEnable = pHTInfo->bRegRxReorderEnable;

        /*
         * Filter out unsupported HT rate for this AP
         * Update RATR table
         * This is only for 8190 ,8192 or later product which using firmware to
         * handle rate adaptive mechanism.
         */

        /*
         * Handle Ralink AP bad MCS rate set condition. Joseph.
         * This fix the bug of Ralink AP. This may be removed in the future.
         */
        if (pPeerHTCap->MCS[0] == 0)
                pPeerHTCap->MCS[0] = 0xff;

        HTFilterMCSRate(ieee, pPeerHTCap->MCS, ieee->dot11HTOperationalRateSet);

        /*
         * Config MIMO Power Save setting
         */
        pHTInfo->PeerMimoPs = pPeerHTCap->MimoPwrSave;
        if (pHTInfo->PeerMimoPs == MIMO_PS_STATIC)
                pMcsFilter = MCS_FILTER_1SS;
        else
                pMcsFilter = MCS_FILTER_ALL;
        //WB add for MCS8 bug
//      pMcsFilter = MCS_FILTER_1SS;

        ieee->HTHighestOperaRate = HTGetHighestMCSRate(ieee, ieee->dot11HTOperationalRateSet, pMcsFilter);
        ieee->HTCurrentOperaRate = ieee->HTHighestOperaRate;

        /*
         * Config current operation mode.
         */
        pHTInfo->CurrentOpMode = pPeerHTInfo->OptMode;
}

/*
 *function:  initialize HT info(struct PRT_HIGH_THROUGHPUT)
 *   input:  struct ieee80211_device*   ieee
 *  output:  none
 *  return:  none
 *  notice: This function is called when
 *                                  *  (1) MPInitialization Phase
 *                                  *  (2) Receiving of Deauthentication from AP
 */
// TODO: Should this funciton be called when receiving of Disassociation?
void HTInitializeHTInfo(struct ieee80211_device *ieee)
{
        PRT_HIGH_THROUGHPUT pHTInfo = ieee->pHTInfo;

        /*
         * These parameters will be reset when receiving deauthentication packet
         */
        IEEE80211_DEBUG(IEEE80211_DL_HT, "===========>%s()\n", __func__);
        pHTInfo->bCurrentHTSupport = false;

        // 40MHz channel support
        pHTInfo->bCurBW40MHz = false;
        pHTInfo->bCurTxBW40MHz = false;

        // Short GI support
        pHTInfo->bCurShortGI20MHz = false;
        pHTInfo->bCurShortGI40MHz = false;
        pHTInfo->bForcedShortGI = false;

        /*
         * CCK rate support
         * This flag is set to true to support CCK rate by default.
         * It will be affected by "pHTInfo->bRegSuppCCK" and AP capabilities
         * only when associate to 11N BSS.
         */
        pHTInfo->bCurSuppCCK = true;

        // AMSDU related
        pHTInfo->bCurrent_AMSDU_Support = false;
        pHTInfo->nCurrent_AMSDU_MaxSize = pHTInfo->nAMSDU_MaxSize;

        // AMPUD related
        pHTInfo->CurrentMPDUDensity = pHTInfo->MPDU_Density;
        pHTInfo->CurrentAMPDUFactor = pHTInfo->AMPDU_Factor;

        // Initialize all of the parameters related to 11n
        memset(&pHTInfo->SelfHTCap, 0, sizeof(pHTInfo->SelfHTCap));
        memset(&pHTInfo->SelfHTInfo, 0, sizeof(pHTInfo->SelfHTInfo));
        memset(&pHTInfo->PeerHTCapBuf, 0, sizeof(pHTInfo->PeerHTCapBuf));
        memset(&pHTInfo->PeerHTInfoBuf, 0, sizeof(pHTInfo->PeerHTInfoBuf));

        pHTInfo->bSwBwInProgress = false;

        // Set default IEEE spec for Draft N
        pHTInfo->ePeerHTSpecVer = HT_SPEC_VER_IEEE;

        // Realtek proprietary aggregation mode
        pHTInfo->bCurrentRT2RTAggregation = false;
        pHTInfo->bCurrentRT2RTLongSlotTime = false;
        pHTInfo->IOTPeer = 0;
        pHTInfo->IOTAction = 0;

        //MCS rate initialized here
        {
                u8 *RegHTSuppRateSets = &ieee->RegHTSuppRateSet[0];

                RegHTSuppRateSets[0] = 0xFF;    //support MCS 0~7
                RegHTSuppRateSets[1] = 0xFF;    //support MCS 8~15
                RegHTSuppRateSets[4] = 0x01;    //support MCS 32
        }
}

/*
 *function:  initialize Bss HT structure(struct PBSS_HT)
 *   input:  PBSS_HT pBssHT //to be initialized
 *  output:  none
 *  return:  none
 *  notice: This function is called when initialize network structure
 */
void HTInitializeBssDesc(PBSS_HT pBssHT)
{
        pBssHT->bdSupportHT = false;
        memset(pBssHT->bdHTCapBuf, 0, sizeof(pBssHT->bdHTCapBuf));
        pBssHT->bdHTCapLen = 0;
        memset(pBssHT->bdHTInfoBuf, 0, sizeof(pBssHT->bdHTInfoBuf));
        pBssHT->bdHTInfoLen = 0;

        pBssHT->bdHTSpecVer = HT_SPEC_VER_IEEE;

        pBssHT->bdRT2RTAggregation = false;
        pBssHT->bdRT2RTLongSlotTime = false;
}

/*
 *function:  initialize Bss HT structure(struct PBSS_HT)
 *   input:  struct ieee80211_device    *ieee
 *           struct ieee80211_network   *pNetwork //usually current network
 *                                                  we are live in
 *  output:  none
 *  return:  none
 *  notice: This function should ONLY be called before association
 */
void HTResetSelfAndSavePeerSetting(struct ieee80211_device *ieee,       struct ieee80211_network *pNetwork)
{
        PRT_HIGH_THROUGHPUT             pHTInfo = ieee->pHTInfo;
//      u16                                             nMaxAMSDUSize;
//      struct ht_capability_ele       *pPeerHTCap = (struct ht_capability_ele *)pNetwork->bssht.bdHTCapBuf;
//      PHT_INFORMATION_ELE             pPeerHTInfo = (PHT_INFORMATION_ELE)pNetwork->bssht.bdHTInfoBuf;
//      u8*     pMcsFilter;
        u8      bIOTAction = 0;

        //
        //  Save Peer Setting before Association
        //
        IEEE80211_DEBUG(IEEE80211_DL_HT, "==============>%s()\n", __func__);
        /*unmark bEnableHT flag here is the same reason why unmarked in function ieee80211_softmac_new_net. WB 2008.09.10*/
//      if( pHTInfo->bEnableHT &&  pNetwork->bssht.bdSupportHT)
        if (pNetwork->bssht.bdSupportHT) {
                pHTInfo->bCurrentHTSupport = true;
                pHTInfo->ePeerHTSpecVer = pNetwork->bssht.bdHTSpecVer;

                // Save HTCap and HTInfo information Element
                if (pNetwork->bssht.bdHTCapLen > 0 &&   pNetwork->bssht.bdHTCapLen <= sizeof(pHTInfo->PeerHTCapBuf))
                        memcpy(pHTInfo->PeerHTCapBuf, pNetwork->bssht.bdHTCapBuf, pNetwork->bssht.bdHTCapLen);

                if (pNetwork->bssht.bdHTInfoLen > 0 && pNetwork->bssht.bdHTInfoLen <= sizeof(pHTInfo->PeerHTInfoBuf))
                        memcpy(pHTInfo->PeerHTInfoBuf, pNetwork->bssht.bdHTInfoBuf, pNetwork->bssht.bdHTInfoLen);

                // Check whether RT to RT aggregation mode is enabled
                if (pHTInfo->bRegRT2RTAggregation) {
                        pHTInfo->bCurrentRT2RTAggregation = pNetwork->bssht.bdRT2RTAggregation;
                        pHTInfo->bCurrentRT2RTLongSlotTime = pNetwork->bssht.bdRT2RTLongSlotTime;
                } else {
                        pHTInfo->bCurrentRT2RTAggregation = false;
                        pHTInfo->bCurrentRT2RTLongSlotTime = false;
                }

                // Determine the IOT Peer Vendor.
                HTIOTPeerDetermine(ieee);

                /*
                 * Decide IOT Action
                 * Must be called after the parameter of pHTInfo->bCurrentRT2RTAggregation is decided
                 */
                pHTInfo->IOTAction = 0;
                bIOTAction = HTIOTActIsDisableMCS14(ieee, pNetwork->bssid);
                if (bIOTAction)
                        pHTInfo->IOTAction |= HT_IOT_ACT_DISABLE_MCS14;

                bIOTAction = HTIOTActIsDisableMCS15(ieee);
                if (bIOTAction)
                        pHTInfo->IOTAction |= HT_IOT_ACT_DISABLE_MCS15;

                bIOTAction = HTIOTActIsDisableMCSTwoSpatialStream(ieee, pNetwork->bssid);
                if (bIOTAction)
                        pHTInfo->IOTAction |= HT_IOT_ACT_DISABLE_ALL_2SS;

                bIOTAction = HTIOTActIsDisableEDCATurbo(ieee, pNetwork->bssid);
                if (bIOTAction)
                        pHTInfo->IOTAction |= HT_IOT_ACT_DISABLE_EDCA_TURBO;

                bIOTAction = HTIOTActIsMgntUseCCK6M(pNetwork);
                if (bIOTAction)
                        pHTInfo->IOTAction |= HT_IOT_ACT_MGNT_USE_CCK_6M;

                bIOTAction = HTIOTActIsCCDFsync(pNetwork->bssid);
                if (bIOTAction)
                        pHTInfo->IOTAction |= HT_IOT_ACT_CDD_FSYNC;
        } else {
                pHTInfo->bCurrentHTSupport = false;
                pHTInfo->bCurrentRT2RTAggregation = false;
                pHTInfo->bCurrentRT2RTLongSlotTime = false;

                pHTInfo->IOTAction = 0;
        }
}

void HTUpdateSelfAndPeerSetting(struct ieee80211_device *ieee,  struct ieee80211_network *pNetwork)
{
        PRT_HIGH_THROUGHPUT             pHTInfo = ieee->pHTInfo;
//      struct ht_capability_ele       *pPeerHTCap = (struct ht_capability_ele *)pNetwork->bssht.bdHTCapBuf;
        PHT_INFORMATION_ELE             pPeerHTInfo = (PHT_INFORMATION_ELE)pNetwork->bssht.bdHTInfoBuf;

        if (pHTInfo->bCurrentHTSupport) {
                /*
                 * Config current operation mode.
                 */
                if (pNetwork->bssht.bdHTInfoLen != 0)
                        pHTInfo->CurrentOpMode = pPeerHTInfo->OptMode;

                /*
                 * <TODO: Config according to OBSS non-HT STA present!!>
                 */
        }
}
EXPORT_SYMBOL(HTUpdateSelfAndPeerSetting);

/*
 *function:  check whether HT control field exists
 *   input:  struct ieee80211_device    *ieee
 *           u8*                        pFrame //coming skb->data
 *  output:  none
 *  return:  return true if HT control field exists(false otherwise)
 *  notice:
 */
u8 HTCCheck(struct ieee80211_device *ieee, u8 *pFrame)
{
        if (ieee->pHTInfo->bCurrentHTSupport) {
                if ((IsQoSDataFrame(pFrame) && Frame_Order(pFrame)) == 1) {
                        IEEE80211_DEBUG(IEEE80211_DL_HT, "HT CONTROL FILED EXIST!!\n");
                        return true;
                }
        }
        return false;
}

static void HTSetConnectBwModeCallback(struct ieee80211_device *ieee)
{
        PRT_HIGH_THROUGHPUT pHTInfo = ieee->pHTInfo;

        IEEE80211_DEBUG(IEEE80211_DL_HT, "======>%s()\n", __func__);

        if (pHTInfo->bCurBW40MHz) {
                if (pHTInfo->CurSTAExtChnlOffset == HT_EXTCHNL_OFFSET_UPPER)
                        ieee->set_chan(ieee->dev, ieee->current_network.channel + 2);
                else if (pHTInfo->CurSTAExtChnlOffset == HT_EXTCHNL_OFFSET_LOWER)
                        ieee->set_chan(ieee->dev, ieee->current_network.channel - 2);
                else
                        ieee->set_chan(ieee->dev, ieee->current_network.channel);

                ieee->SetBWModeHandler(ieee->dev, HT_CHANNEL_WIDTH_20_40, pHTInfo->CurSTAExtChnlOffset);
        } else {
                ieee->set_chan(ieee->dev, ieee->current_network.channel);
                ieee->SetBWModeHandler(ieee->dev, HT_CHANNEL_WIDTH_20, HT_EXTCHNL_OFFSET_NO_EXT);
        }

        pHTInfo->bSwBwInProgress = false;
}

/*
 * This function set bandwidth mode in protocol layer.
 */
void HTSetConnectBwMode(struct ieee80211_device *ieee, enum ht_channel_width Bandwidth, enum ht_extension_chan_offset Offset)
{
        PRT_HIGH_THROUGHPUT pHTInfo = ieee->pHTInfo;
//      u32 flags = 0;

        if (!pHTInfo->bRegBW40MHz)
                return;

        // To reduce dummy operation
//      if((pHTInfo->bCurBW40MHz==false && Bandwidth==HT_CHANNEL_WIDTH_20) ||
//         (pHTInfo->bCurBW40MHz==true && Bandwidth==HT_CHANNEL_WIDTH_20_40 && Offset==pHTInfo->CurSTAExtChnlOffset))
//              return;

//      spin_lock_irqsave(&(ieee->bw_spinlock), flags);
        if (pHTInfo->bSwBwInProgress) {
//              spin_unlock_irqrestore(&(ieee->bw_spinlock), flags);
                return;
        }
        //if in half N mode, set to 20M bandwidth please 09.08.2008 WB.
        if (Bandwidth == HT_CHANNEL_WIDTH_20_40 && (!ieee->GetHalfNmodeSupportByAPsHandler(ieee->dev))) {
                        // Handle Illegal extension channel offset!!
                if (ieee->current_network.channel < 2 && Offset == HT_EXTCHNL_OFFSET_LOWER)
                        Offset = HT_EXTCHNL_OFFSET_NO_EXT;
                if (Offset == HT_EXTCHNL_OFFSET_UPPER || Offset == HT_EXTCHNL_OFFSET_LOWER) {
                        pHTInfo->bCurBW40MHz = true;
                        pHTInfo->CurSTAExtChnlOffset = Offset;
                } else {
                        pHTInfo->bCurBW40MHz = false;
                        pHTInfo->CurSTAExtChnlOffset = HT_EXTCHNL_OFFSET_NO_EXT;
                }
        } else {
                pHTInfo->bCurBW40MHz = false;
                pHTInfo->CurSTAExtChnlOffset = HT_EXTCHNL_OFFSET_NO_EXT;
        }

        pHTInfo->bSwBwInProgress = true;

        /*
         * TODO: 2007.7.13 by Emily Wait 2000ms  in order to guarantee that
         * switching bandwidth is executed after scan is finished. It is a
         * temporal solution because software should ganrantee the last
         * operation of switching bandwidth is executed properlly.
         */
        HTSetConnectBwModeCallback(ieee);

//      spin_unlock_irqrestore(&(ieee->bw_spinlock), flags);
}