/******************************************************************************
 * Copyright(c) 2008 - 2010 Realtek Corporation. All rights reserved.
 * Linux device driver for RTL8192U
 *
 * Based on the r8187 driver, which is:
 * Copyright 2004-2005 Andrea Merello <andrea.merello@gmail.com>, et al.
 * 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:
 * Jerry chuang <wlanfae@realtek.com>
 */

#ifndef CONFIG_FORCE_HARD_FLOAT
double __floatsidf(int i)
{
	return i;
}

unsigned int __fixunsdfsi(double d)
{
	return d;
}

double __adddf3(double a, double b)
{
	return a+b;
}

double __addsf3(float a, float b)
{
	return a+b;
}

double __subdf3(double a, double b)
{
	return a-b;
}

double __extendsfdf2(float a)
{
	return a;
}
#endif

#define CONFIG_RTL8192_IO_MAP

#include <asm/uaccess.h>
#include "r8192U_hw.h"
#include "r8192U.h"
#include "r8190_rtl8256.h" /* RTL8225 Radio frontend */
#include "r8180_93cx6.h"   /* Card EEPROM */
#include "r8192U_wx.h"
#include "r819xU_phy.h" //added by WB 4.30.2008
#include "r819xU_phyreg.h"
#include "r819xU_cmdpkt.h"
#include "r8192U_dm.h"
#include <linux/usb.h>
#include <linux/slab.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
// FIXME: check if 2.6.7 is ok

#include "dot11d.h"
//set here to open your trace code. //WB
u32 rt_global_debug_component = COMP_DOWN	|
				COMP_SEC	|
				COMP_ERR; //always open err flags on

#define TOTAL_CAM_ENTRY 32
#define CAM_CONTENT_COUNT 8

static const struct usb_device_id rtl8192_usb_id_tbl[] = {
	/* Realtek */
	{USB_DEVICE(0x0bda, 0x8709)},
	/* Corega */
	{USB_DEVICE(0x07aa, 0x0043)},
	/* Belkin */
	{USB_DEVICE(0x050d, 0x805E)},
	/* Sitecom */
	{USB_DEVICE(0x0df6, 0x0031)},
	/* EnGenius */
	{USB_DEVICE(0x1740, 0x9201)},
	/* Dlink */
	{USB_DEVICE(0x2001, 0x3301)},
	/* Zinwell */
	{USB_DEVICE(0x5a57, 0x0290)},
	/* LG */
	{USB_DEVICE(0x043e, 0x7a01)},
	{}
};

MODULE_LICENSE("GPL");
MODULE_VERSION("V 1.1");
MODULE_DEVICE_TABLE(usb, rtl8192_usb_id_tbl);
MODULE_DESCRIPTION("Linux driver for Realtek RTL8192 USB WiFi cards");

static char *ifname = "wlan%d";
static int hwwep = 1;  //default use hw. set 0 to use software security
static int channels = 0x3fff;


module_param(ifname, charp, S_IRUGO|S_IWUSR);
module_param(hwwep, int, S_IRUGO|S_IWUSR);
module_param(channels, int, S_IRUGO|S_IWUSR);

MODULE_PARM_DESC(ifname, " Net interface name, wlan%d=default");
MODULE_PARM_DESC(hwwep, " Try to use hardware security support. ");
MODULE_PARM_DESC(channels, " Channel bitmask for specific locales. NYI");

static int rtl8192_usb_probe(struct usb_interface *intf,
			     const struct usb_device_id *id);
static void rtl8192_usb_disconnect(struct usb_interface *intf);


static struct usb_driver rtl8192_usb_driver = {
	.name		= RTL819xU_MODULE_NAME,		  /* Driver name   */
	.id_table	= rtl8192_usb_id_tbl,		  /* PCI_ID table  */
	.probe		= rtl8192_usb_probe,		  /* probe fn      */
	.disconnect	= rtl8192_usb_disconnect,	  /* remove fn     */
	.suspend	= NULL,				  /* PM suspend fn */
	.resume		= NULL,				  /* PM resume fn  */
};


struct CHANNEL_LIST {
	u8	Channel[32];
	u8	Len;
};

static struct CHANNEL_LIST ChannelPlan[] = {
	{{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 36, 40, 44, 48, 52, 56, 60, 64, 149, 153, 157, 161, 165}, 24},		//FCC
	{{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11}, 11},							//IC
	{{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 36, 40, 44, 48, 52, 56, 60, 64}, 21},	//ETSI
	{{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13}, 13},    //Spain. Change to ETSI.
	{{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13}, 13},	//France. Change to ETSI.
	{{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 36, 40, 44, 48, 52, 56, 60, 64}, 22},	//MKK					//MKK
	{{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 36, 40, 44, 48, 52, 56, 60, 64}, 22},//MKK1
	{{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13}, 13},	//Israel.
	{{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 36, 40, 44, 48, 52, 56, 60, 64}, 22},			// For 11a , TELEC
	{{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 36, 40, 44, 48, 52, 56, 60, 64}, 22},    //MIC
	{{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14}, 14}					//For Global Domain. 1-11:active scan, 12-14 passive scan. //+YJ, 080626
};

static void rtl819x_set_channel_map(u8 channel_plan, struct r8192_priv *priv)
{
	int i, max_chan = -1, min_chan = -1;
	struct ieee80211_device *ieee = priv->ieee80211;
	switch (channel_plan) {
	case COUNTRY_CODE_FCC:
	case COUNTRY_CODE_IC:
	case COUNTRY_CODE_ETSI:
	case COUNTRY_CODE_SPAIN:
	case COUNTRY_CODE_FRANCE:
	case COUNTRY_CODE_MKK:
	case COUNTRY_CODE_MKK1:
	case COUNTRY_CODE_ISRAEL:
	case COUNTRY_CODE_TELEC:
	case COUNTRY_CODE_MIC:
		Dot11d_Init(ieee);
		ieee->bGlobalDomain = false;
		//actually 8225 & 8256 rf chips only support B,G,24N mode
		if ((priv->rf_chip == RF_8225) || (priv->rf_chip == RF_8256)) {
			min_chan = 1;
			max_chan = 14;
		} else {
			RT_TRACE(COMP_ERR, "unknown rf chip, can't set channel map in function:%s()\n", __func__);
		}
		if (ChannelPlan[channel_plan].Len != 0) {
			// Clear old channel map
			memset(GET_DOT11D_INFO(ieee)->channel_map, 0, sizeof(GET_DOT11D_INFO(ieee)->channel_map));
			// Set new channel map
			for (i = 0; i < ChannelPlan[channel_plan].Len; i++) {
				if (ChannelPlan[channel_plan].Channel[i] < min_chan || ChannelPlan[channel_plan].Channel[i] > max_chan)
					break;
				GET_DOT11D_INFO(ieee)->channel_map[ChannelPlan[channel_plan].Channel[i]] = 1;
			}
		}
		break;

	case COUNTRY_CODE_GLOBAL_DOMAIN:
		GET_DOT11D_INFO(ieee)->bEnabled = 0;//this flag enabled to follow 11d country IE setting, otherwise, it shall follow global domain settings.
		Dot11d_Reset(ieee);
		ieee->bGlobalDomain = true;
		break;

	default:
		break;
	}
}


static void CamResetAllEntry(struct net_device *dev)
{
	u32 ulcommand = 0;
	//2004/02/11  In static WEP, OID_ADD_KEY or OID_ADD_WEP are set before STA associate to AP.
	// However, ResetKey is called on OID_802_11_INFRASTRUCTURE_MODE and MlmeAssociateRequest
	// In this condition, Cam can not be reset because upper layer will not set this static key again.
	ulcommand |= BIT31|BIT30;
	write_nic_dword(dev, RWCAM, ulcommand);

}


void write_cam(struct net_device *dev, u8 addr, u32 data)
{
	write_nic_dword(dev, WCAMI, data);
	write_nic_dword(dev, RWCAM, BIT31|BIT16|(addr&0xff));
}

u32 read_cam(struct net_device *dev, u8 addr)
{
	u32 data;

	write_nic_dword(dev, RWCAM, 0x80000000|(addr&0xff));
	read_nic_dword(dev, 0xa8, &data);
	return data;
}

void write_nic_byte_E(struct net_device *dev, int indx, u8 data)
{
	int status;
	struct r8192_priv *priv = (struct r8192_priv *)ieee80211_priv(dev);
	struct usb_device *udev = priv->udev;

	status = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
				 RTL8187_REQ_SET_REGS, RTL8187_REQT_WRITE,
				 indx|0xfe00, 0, &data, 1, HZ / 2);

	if (status < 0)
		netdev_err(dev, "write_nic_byte_E TimeOut! status: %d\n", status);
}

int read_nic_byte_E(struct net_device *dev, int indx, u8 *data)
{
	int status;
	struct r8192_priv *priv = (struct r8192_priv *)ieee80211_priv(dev);
	struct usb_device *udev = priv->udev;

	status = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
				 RTL8187_REQ_GET_REGS, RTL8187_REQT_READ,
				 indx|0xfe00, 0, data, 1, HZ / 2);

	if (status < 0) {
		netdev_err(dev, "%s failure status: %d\n", __func__, status);
		return status;
	}

	return 0;
}
//as 92U has extend page from 4 to 16, so modify functions below.
void write_nic_byte(struct net_device *dev, int indx, u8 data)
{
	int status;

	struct r8192_priv *priv = (struct r8192_priv *)ieee80211_priv(dev);
	struct usb_device *udev = priv->udev;

	status = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
				 RTL8187_REQ_SET_REGS, RTL8187_REQT_WRITE,
				 (indx&0xff)|0xff00, (indx>>8)&0x0f, &data, 1, HZ / 2);

	if (status < 0)
		netdev_err(dev, "write_nic_byte TimeOut! status: %d\n", status);


}


void write_nic_word(struct net_device *dev, int indx, u16 data)
{

	int status;

	struct r8192_priv *priv = (struct r8192_priv *)ieee80211_priv(dev);
	struct usb_device *udev = priv->udev;

	status = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
				 RTL8187_REQ_SET_REGS, RTL8187_REQT_WRITE,
				 (indx&0xff)|0xff00, (indx>>8)&0x0f, &data, 2, HZ / 2);

	if (status < 0)
		netdev_err(dev, "write_nic_word TimeOut! status: %d\n", status);

}


void write_nic_dword(struct net_device *dev, int indx, u32 data)
{

	int status;

	struct r8192_priv *priv = (struct r8192_priv *)ieee80211_priv(dev);
	struct usb_device *udev = priv->udev;

	status = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
				 RTL8187_REQ_SET_REGS, RTL8187_REQT_WRITE,
				 (indx&0xff)|0xff00, (indx>>8)&0x0f, &data, 4, HZ / 2);


	if (status < 0)
		netdev_err(dev, "write_nic_dword TimeOut! status: %d\n", status);

}


int read_nic_byte(struct net_device *dev, int indx, u8 *data)
{
	int status;
	struct r8192_priv *priv = (struct r8192_priv *)ieee80211_priv(dev);
	struct usb_device *udev = priv->udev;

	status = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
				 RTL8187_REQ_GET_REGS, RTL8187_REQT_READ,
				 (indx&0xff)|0xff00, (indx>>8)&0x0f, data, 1, HZ / 2);

	if (status < 0) {
		netdev_err(dev, "%s failure status: %d\n", __func__, status);
		return status;
	}

	return 0;
}


int read_nic_word(struct net_device *dev, int indx, u16 *data)
{
	int status;
	struct r8192_priv *priv = (struct r8192_priv *)ieee80211_priv(dev);
	struct usb_device *udev = priv->udev;

	status = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
				 RTL8187_REQ_GET_REGS, RTL8187_REQT_READ,
				 (indx&0xff)|0xff00, (indx>>8)&0x0f,
				 data, 2, HZ / 2);

	if (status < 0) {
		netdev_err(dev, "%s failure status: %d\n", __func__, status);
		return status;
	}

	return 0;
}

static int read_nic_word_E(struct net_device *dev, int indx, u16 *data)
{
	int status;
	struct r8192_priv *priv = (struct r8192_priv *)ieee80211_priv(dev);
	struct usb_device *udev = priv->udev;

	status = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
				 RTL8187_REQ_GET_REGS, RTL8187_REQT_READ,
				 indx|0xfe00, 0, data, 2, HZ / 2);

	if (status < 0) {
		netdev_err(dev, "%s failure status: %d\n", __func__, status);
		return status;
	}

	return 0;
}

int read_nic_dword(struct net_device *dev, int indx, u32 *data)
{
	int status;

	struct r8192_priv *priv = (struct r8192_priv *)ieee80211_priv(dev);
	struct usb_device *udev = priv->udev;

	status = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
				 RTL8187_REQ_GET_REGS, RTL8187_REQT_READ,
				 (indx&0xff)|0xff00, (indx>>8)&0x0f,
				 data, 4, HZ / 2);

	if (status < 0) {
		netdev_err(dev, "%s failure status: %d\n", __func__, status);
		return status;
	}

	return 0;
}

/* u8 read_phy_cck(struct net_device *dev, u8 adr); */
/* u8 read_phy_ofdm(struct net_device *dev, u8 adr); */
/* this might still called in what was the PHY rtl8185/rtl8192 common code
 * plans are to possibility turn it again in one common code...
 */
inline void force_pci_posting(struct net_device *dev)
{
}

static struct net_device_stats *rtl8192_stats(struct net_device *dev);
void rtl8192_commit(struct net_device *dev);
void rtl8192_restart(struct work_struct *work);
void watch_dog_timer_callback(unsigned long data);

/****************************************************************************
 *   -----------------------------PROCFS STUFF-------------------------
*****************************************************************************
 */

static struct proc_dir_entry *rtl8192_proc;

static int proc_get_stats_ap(struct seq_file *m, void *v)
{
	struct net_device *dev = m->private;
	struct r8192_priv *priv = (struct r8192_priv *)ieee80211_priv(dev);
	struct ieee80211_device *ieee = priv->ieee80211;
	struct ieee80211_network *target;

	list_for_each_entry(target, &ieee->network_list, list) {
		const char *wpa = "non_WPA";
		if (target->wpa_ie_len > 0 || target->rsn_ie_len > 0)
			wpa = "WPA";

		seq_printf(m, "%s %s\n", target->ssid, wpa);
	}

	return 0;
}

static int proc_get_registers(struct seq_file *m, void *v)
{
	struct net_device *dev = m->private;
	int i, n, max = 0xff;
	u8 byte_rd;

	seq_puts(m, "\n####################page 0##################\n ");

	for (n = 0; n <= max;) {
		seq_printf(m, "\nD:  %2x > ", n);

		for (i = 0; i < 16 && n <= max; i++, n++) {
			read_nic_byte(dev, 0x000|n, &byte_rd);
			seq_printf(m, "%2x ", byte_rd);
		}
	}

	seq_puts(m, "\n####################page 1##################\n ");
	for (n = 0; n <= max;) {
		seq_printf(m, "\nD:  %2x > ", n);

		for (i = 0; i < 16 && n <= max; i++, n++) {
			read_nic_byte(dev, 0x100|n, &byte_rd);
			seq_printf(m, "%2x ", byte_rd);
		}
	}

	seq_puts(m, "\n####################page 3##################\n ");
	for (n = 0; n <= max;) {
		seq_printf(m, "\nD:  %2x > ", n);

		for (i = 0; i < 16 && n <= max; i++, n++) {
			read_nic_byte(dev, 0x300|n, &byte_rd);
			seq_printf(m, "%2x ", byte_rd);
		}
	}

	seq_putc(m, '\n');
	return 0;
}

static int proc_get_stats_tx(struct seq_file *m, void *v)
{
	struct net_device *dev = m->private;
	struct r8192_priv *priv = (struct r8192_priv *)ieee80211_priv(dev);

	seq_printf(m,
		   "TX VI priority ok int: %lu\n"
		   "TX VI priority error int: %lu\n"
		   "TX VO priority ok int: %lu\n"
		   "TX VO priority error int: %lu\n"
		   "TX BE priority ok int: %lu\n"
		   "TX BE priority error int: %lu\n"
		   "TX BK priority ok int: %lu\n"
		   "TX BK priority error int: %lu\n"
		   "TX MANAGE priority ok int: %lu\n"
		   "TX MANAGE priority error int: %lu\n"
		   "TX BEACON priority ok int: %lu\n"
		   "TX BEACON priority error int: %lu\n"
		   "TX queue resume: %lu\n"
		   "TX queue stopped?: %d\n"
		   "TX fifo overflow: %lu\n"
		   "TX VI queue: %d\n"
		   "TX VO queue: %d\n"
		   "TX BE queue: %d\n"
		   "TX BK queue: %d\n"
		   "TX VI dropped: %lu\n"
		   "TX VO dropped: %lu\n"
		   "TX BE dropped: %lu\n"
		   "TX BK dropped: %lu\n"
		   "TX total data packets %lu\n",
		   priv->stats.txviokint,
		   priv->stats.txvierr,
		   priv->stats.txvookint,
		   priv->stats.txvoerr,
		   priv->stats.txbeokint,
		   priv->stats.txbeerr,
		   priv->stats.txbkokint,
		   priv->stats.txbkerr,
		   priv->stats.txmanageokint,
		   priv->stats.txmanageerr,
		   priv->stats.txbeaconokint,
		   priv->stats.txbeaconerr,
		   priv->stats.txresumed,
		   netif_queue_stopped(dev),
		   priv->stats.txoverflow,
		   atomic_read(&(priv->tx_pending[VI_PRIORITY])),
		   atomic_read(&(priv->tx_pending[VO_PRIORITY])),
		   atomic_read(&(priv->tx_pending[BE_PRIORITY])),
		   atomic_read(&(priv->tx_pending[BK_PRIORITY])),
		   priv->stats.txvidrop,
		   priv->stats.txvodrop,
		   priv->stats.txbedrop,
		   priv->stats.txbkdrop,
		   priv->stats.txdatapkt
		);

	return 0;
}

static int proc_get_stats_rx(struct seq_file *m, void *v)
{
	struct net_device *dev = m->private;
	struct r8192_priv *priv = (struct r8192_priv *)ieee80211_priv(dev);

	seq_printf(m,
		   "RX packets: %lu\n"
		   "RX urb status error: %lu\n"
		   "RX invalid urb error: %lu\n",
		   priv->stats.rxoktotal,
		   priv->stats.rxstaterr,
		   priv->stats.rxurberr);

	return 0;
}

static void rtl8192_proc_module_init(void)
{
	RT_TRACE(COMP_INIT, "Initializing proc filesystem");
	rtl8192_proc = proc_mkdir(RTL819xU_MODULE_NAME, init_net.proc_net);
}

/*
 * seq_file wrappers for procfile show routines.
 */
static int rtl8192_proc_open(struct inode *inode, struct file *file)
{
	struct net_device *dev = proc_get_parent_data(inode);
	int (*show)(struct seq_file *, void *) = PDE_DATA(inode);

	return single_open(file, show, dev);
}

static const struct file_operations rtl8192_proc_fops = {
	.open		= rtl8192_proc_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= single_release,
};

/*
 * Table of proc files we need to create.
 */
struct rtl8192_proc_file {
	char name[12];
	int (*show)(struct seq_file *, void *);
};

static const struct rtl8192_proc_file rtl8192_proc_files[] = {
	{ "stats-rx",	&proc_get_stats_rx },
	{ "stats-tx",	&proc_get_stats_tx },
	{ "stats-ap",	&proc_get_stats_ap },
	{ "registers",	&proc_get_registers },
	{ "" }
};

static void rtl8192_proc_init_one(struct net_device *dev)
{
	const struct rtl8192_proc_file *f;
	struct proc_dir_entry *dir;

	if (rtl8192_proc) {
		dir = proc_mkdir_data(dev->name, 0, rtl8192_proc, dev);
		if (!dir) {
			RT_TRACE(COMP_ERR, "Unable to initialize /proc/net/rtl8192/%s\n",
				 dev->name);
			return;
		}

		for (f = rtl8192_proc_files; f->name[0]; f++) {
			if (!proc_create_data(f->name, S_IFREG | S_IRUGO, dir,
					      &rtl8192_proc_fops, f->show)) {
				RT_TRACE(COMP_ERR, "Unable to initialize "
					 "/proc/net/rtl8192/%s/%s\n",
					 dev->name, f->name);
				return;
			}
		}
	}
}

static void rtl8192_proc_remove_one(struct net_device *dev)
{
	remove_proc_subtree(dev->name, rtl8192_proc);
}

/****************************************************************************
   -----------------------------MISC STUFF-------------------------
*****************************************************************************/

short check_nic_enough_desc(struct net_device *dev, int queue_index)
{
	struct r8192_priv *priv = ieee80211_priv(dev);
	int used = atomic_read(&priv->tx_pending[queue_index]);

	return (used < MAX_TX_URB);
}

static void tx_timeout(struct net_device *dev)
{
	struct r8192_priv *priv = ieee80211_priv(dev);

	schedule_work(&priv->reset_wq);
}

void rtl8192_update_msr(struct net_device *dev)
{
	struct r8192_priv *priv = ieee80211_priv(dev);
	u8 msr;

	read_nic_byte(dev, MSR, &msr);
	msr &= ~MSR_LINK_MASK;

	/* do not change in link_state != WLAN_LINK_ASSOCIATED.
	 * msr must be updated if the state is ASSOCIATING.
	 * this is intentional and make sense for ad-hoc and
	 * master (see the create BSS/IBSS func)
	 */
	if (priv->ieee80211->state == IEEE80211_LINKED) {

		if (priv->ieee80211->iw_mode == IW_MODE_INFRA)
			msr |= (MSR_LINK_MANAGED<<MSR_LINK_SHIFT);
		else if (priv->ieee80211->iw_mode == IW_MODE_ADHOC)
			msr |= (MSR_LINK_ADHOC<<MSR_LINK_SHIFT);
		else if (priv->ieee80211->iw_mode == IW_MODE_MASTER)
			msr |= (MSR_LINK_MASTER<<MSR_LINK_SHIFT);

	} else {
		msr |= (MSR_LINK_NONE<<MSR_LINK_SHIFT);
	}

	write_nic_byte(dev, MSR, msr);
}

void rtl8192_set_chan(struct net_device *dev, short ch)
{
	struct r8192_priv *priv = (struct r8192_priv *)ieee80211_priv(dev);
	RT_TRACE(COMP_CH, "=====>%s()====ch:%d\n", __func__, ch);
	priv->chan = ch;

	/* this hack should avoid frame TX during channel setting*/

	//need to implement rf set channel here WB

	if (priv->rf_set_chan)
		priv->rf_set_chan(dev, priv->chan);
	mdelay(10);
}

static void rtl8192_rx_isr(struct urb *urb);

static u32 get_rxpacket_shiftbytes_819xusb(struct ieee80211_rx_stats *pstats)
{

	return (sizeof(rx_desc_819x_usb) + pstats->RxDrvInfoSize
		+ pstats->RxBufShift);

}
static int rtl8192_rx_initiate(struct net_device *dev)
{
	struct r8192_priv *priv = (struct r8192_priv *)ieee80211_priv(dev);
	struct urb *entry;
	struct sk_buff *skb;
	struct rtl8192_rx_info *info;

	/* nomal packet rx procedure */
	while (skb_queue_len(&priv->rx_queue) < MAX_RX_URB) {
		skb = __dev_alloc_skb(RX_URB_SIZE, GFP_KERNEL);
		if (!skb)
			break;
		entry = usb_alloc_urb(0, GFP_KERNEL);
		if (!entry) {
			kfree_skb(skb);
			break;
		}
		usb_fill_bulk_urb(entry, priv->udev,
				  usb_rcvbulkpipe(priv->udev, 3), skb_tail_pointer(skb),
				  RX_URB_SIZE, rtl8192_rx_isr, skb);
		info = (struct rtl8192_rx_info *) skb->cb;
		info->urb = entry;
		info->dev = dev;
		info->out_pipe = 3; //denote rx normal packet queue
		skb_queue_tail(&priv->rx_queue, skb);
		usb_submit_urb(entry, GFP_KERNEL);
	}

	/* command packet rx procedure */
	while (skb_queue_len(&priv->rx_queue) < MAX_RX_URB + 3) {
		skb = __dev_alloc_skb(RX_URB_SIZE, GFP_KERNEL);
		if (!skb)
			break;
		entry = usb_alloc_urb(0, GFP_KERNEL);
		if (!entry) {
			kfree_skb(skb);
			break;
		}
		usb_fill_bulk_urb(entry, priv->udev,
				  usb_rcvbulkpipe(priv->udev, 9), skb_tail_pointer(skb),
				  RX_URB_SIZE, rtl8192_rx_isr, skb);
		info = (struct rtl8192_rx_info *) skb->cb;
		info->urb = entry;
		info->dev = dev;
		info->out_pipe = 9; //denote rx cmd packet queue
		skb_queue_tail(&priv->rx_queue, skb);
		usb_submit_urb(entry, GFP_KERNEL);
	}

	return 0;
}

void rtl8192_set_rxconf(struct net_device *dev)
{
	struct r8192_priv *priv = (struct r8192_priv *)ieee80211_priv(dev);
	u32 rxconf;

	read_nic_dword(dev, RCR, &rxconf);
	rxconf = rxconf & ~MAC_FILTER_MASK;
	rxconf = rxconf | RCR_AMF;
	rxconf = rxconf | RCR_ADF;
	rxconf = rxconf | RCR_AB;
	rxconf = rxconf | RCR_AM;

	if (dev->flags & IFF_PROMISC)
		DMESG("NIC in promisc mode");

	if (priv->ieee80211->iw_mode == IW_MODE_MONITOR ||
	    dev->flags & IFF_PROMISC) {
		rxconf = rxconf | RCR_AAP;
	} else {
		rxconf = rxconf | RCR_APM;
		rxconf = rxconf | RCR_CBSSID;
	}


	if (priv->ieee80211->iw_mode == IW_MODE_MONITOR) {
		rxconf = rxconf | RCR_AICV;
		rxconf = rxconf | RCR_APWRMGT;
	}

	if (priv->crcmon == 1 && priv->ieee80211->iw_mode == IW_MODE_MONITOR)
		rxconf = rxconf | RCR_ACRC32;


	rxconf = rxconf & ~RX_FIFO_THRESHOLD_MASK;
	rxconf = rxconf | (RX_FIFO_THRESHOLD_NONE<<RX_FIFO_THRESHOLD_SHIFT);
	rxconf = rxconf & ~MAX_RX_DMA_MASK;
	rxconf = rxconf | ((u32)7<<RCR_MXDMA_OFFSET);

	rxconf = rxconf | RCR_ONLYERLPKT;

	write_nic_dword(dev, RCR, rxconf);
}
//wait to be removed
void rtl8192_rx_enable(struct net_device *dev)
{
	rtl8192_rx_initiate(dev);
}


void rtl8192_tx_enable(struct net_device *dev)
{
}


void rtl8192_rtx_disable(struct net_device *dev)
{
	u8 cmd;
	struct r8192_priv *priv = ieee80211_priv(dev);
	struct sk_buff *skb;
	struct rtl8192_rx_info *info;

	read_nic_byte(dev, CMDR, &cmd);
	write_nic_byte(dev, CMDR, cmd & ~(CR_TE|CR_RE));
	force_pci_posting(dev);
	mdelay(10);

	while ((skb = __skb_dequeue(&priv->rx_queue))) {
		info = (struct rtl8192_rx_info *) skb->cb;
		if (!info->urb)
			continue;

		usb_kill_urb(info->urb);
		kfree_skb(skb);
	}

	if (skb_queue_len(&priv->skb_queue))
		netdev_warn(dev, "skb_queue not empty\n");

	skb_queue_purge(&priv->skb_queue);
	return;
}

inline u16 ieeerate2rtlrate(int rate)
{
	switch (rate) {
	case 10:
		return 0;
	case 20:
		return 1;
	case 55:
		return 2;
	case 110:
		return 3;
	case 60:
		return 4;
	case 90:
		return 5;
	case 120:
		return 6;
	case 180:
		return 7;
	case 240:
		return 8;
	case 360:
		return 9;
	case 480:
		return 10;
	case 540:
		return 11;
	default:
		return 3;

	}
}
static u16 rtl_rate[] = {10, 20, 55, 110, 60, 90, 120, 180, 240, 360, 480, 540};
inline u16 rtl8192_rate2rate(short rate)
{
	if (rate > 11)
		return 0;
	return rtl_rate[rate];
}


/* The prototype of rx_isr has changed since one version of Linux Kernel */
static void rtl8192_rx_isr(struct urb *urb)
{
	struct sk_buff *skb = (struct sk_buff *) urb->context;
	struct rtl8192_rx_info *info = (struct rtl8192_rx_info *)skb->cb;
	struct net_device *dev = info->dev;
	struct r8192_priv *priv = ieee80211_priv(dev);
	int out_pipe = info->out_pipe;
	int err;
	if (!priv->up)
		return;
	if (unlikely(urb->status)) {
		info->urb = NULL;
		priv->stats.rxstaterr++;
		priv->ieee80211->stats.rx_errors++;
		usb_free_urb(urb);
		return;
	}
	skb_unlink(skb, &priv->rx_queue);
	skb_put(skb, urb->actual_length);

	skb_queue_tail(&priv->skb_queue, skb);
	tasklet_schedule(&priv->irq_rx_tasklet);

	skb = dev_alloc_skb(RX_URB_SIZE);
	if (unlikely(!skb)) {
		usb_free_urb(urb);
		netdev_err(dev, "%s(): can't alloc skb\n", __func__);
		/* TODO check rx queue length and refill *somewhere* */
		return;
	}

	usb_fill_bulk_urb(urb, priv->udev,
			  usb_rcvbulkpipe(priv->udev, out_pipe), skb_tail_pointer(skb),
			  RX_URB_SIZE, rtl8192_rx_isr, skb);

	info = (struct rtl8192_rx_info *) skb->cb;
	info->urb = urb;
	info->dev = dev;
	info->out_pipe = out_pipe;

	urb->transfer_buffer = skb_tail_pointer(skb);
	urb->context = skb;
	skb_queue_tail(&priv->rx_queue, skb);
	err = usb_submit_urb(urb, GFP_ATOMIC);
	if (err && err != EPERM)
		netdev_err(dev, "can not submit rxurb, err is %x, URB status is %x\n", err, urb->status);
}

static u32 rtl819xusb_rx_command_packet(struct net_device *dev,
					struct ieee80211_rx_stats *pstats)
{
	u32	status;

	status = cmpk_message_handle_rx(dev, pstats);
	if (status)
		DMESG("rxcommandpackethandle819xusb: It is a command packet\n");

	return status;
}


static void rtl8192_data_hard_stop(struct net_device *dev)
{
	//FIXME !!
}


static void rtl8192_data_hard_resume(struct net_device *dev)
{
	// FIXME !!
}

/* this function TX data frames when the ieee80211 stack requires this.
 * It checks also if we need to stop the ieee tx queue, eventually do it
 */
static void rtl8192_hard_data_xmit(struct sk_buff *skb, struct net_device *dev, int rate)
{
	struct r8192_priv *priv = (struct r8192_priv *)ieee80211_priv(dev);
	int ret;
	unsigned long flags;
	cb_desc *tcb_desc = (cb_desc *)(skb->cb + MAX_DEV_ADDR_SIZE);
	u8 queue_index = tcb_desc->queue_index;

	/* shall not be referred by command packet */
	RTL8192U_ASSERT(queue_index != TXCMD_QUEUE);

	spin_lock_irqsave(&priv->tx_lock, flags);

	memcpy((unsigned char *)(skb->cb), &dev, sizeof(dev));
	tcb_desc->bTxEnableFwCalcDur = 1;
	skb_push(skb, priv->ieee80211->tx_headroom);
	ret = rtl8192_tx(dev, skb);

	spin_unlock_irqrestore(&priv->tx_lock, flags);

	return;
}

/* This is a rough attempt to TX a frame
 * This is called by the ieee 80211 stack to TX management frames.
 * If the ring is full packet are dropped (for data frame the queue
 * is stopped before this can happen).
 */
static int rtl8192_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
	struct r8192_priv *priv = (struct r8192_priv *)ieee80211_priv(dev);
	int ret;
	unsigned long flags;
	cb_desc *tcb_desc = (cb_desc *)(skb->cb + MAX_DEV_ADDR_SIZE);
	u8 queue_index = tcb_desc->queue_index;


	spin_lock_irqsave(&priv->tx_lock, flags);

	memcpy((unsigned char *)(skb->cb), &dev, sizeof(dev));
	if (queue_index == TXCMD_QUEUE) {
		skb_push(skb, USB_HWDESC_HEADER_LEN);
		rtl819xU_tx_cmd(dev, skb);
		ret = 1;
		spin_unlock_irqrestore(&priv->tx_lock, flags);
		return ret;
	} else {
		skb_push(skb, priv->ieee80211->tx_headroom);
		ret = rtl8192_tx(dev, skb);
	}

	spin_unlock_irqrestore(&priv->tx_lock, flags);

	return ret;
}


void rtl8192_try_wake_queue(struct net_device *dev, int pri);

static void rtl8192_tx_isr(struct urb *tx_urb)
{
	struct sk_buff *skb = (struct sk_buff *)tx_urb->context;
	struct net_device *dev = (struct net_device *)(skb->cb);
	struct r8192_priv *priv = NULL;
	cb_desc *tcb_desc = (cb_desc *)(skb->cb + MAX_DEV_ADDR_SIZE);
	u8  queue_index = tcb_desc->queue_index;

	priv = ieee80211_priv(dev);

	if (tcb_desc->queue_index != TXCMD_QUEUE) {
		if (tx_urb->status == 0) {
			dev->trans_start = jiffies;
			priv->stats.txoktotal++;
			priv->ieee80211->LinkDetectInfo.NumTxOkInPeriod++;
			priv->stats.txbytesunicast += (skb->len - priv->ieee80211->tx_headroom);
		} else {
			priv->ieee80211->stats.tx_errors++;
			/* TODO */
		}
	}

	/* free skb and tx_urb */
	if (skb != NULL) {
		dev_kfree_skb_any(skb);
		usb_free_urb(tx_urb);
		atomic_dec(&priv->tx_pending[queue_index]);
	}

	//
	// Handle HW Beacon:
	// We had transfer our beacon frame to host controller at this moment.
	//
	//
	// Caution:
	// Handling the wait queue of command packets.
	// For Tx command packets, we must not do TCB fragment because it is not handled right now.
	// We must cut the packets to match the size of TX_CMD_PKT before we send it.
	//

	/* Handle MPDU in wait queue. */
	if (queue_index != BEACON_QUEUE) {
		/* Don't send data frame during scanning.*/
		if ((skb_queue_len(&priv->ieee80211->skb_waitQ[queue_index]) != 0) &&
		    (!(priv->ieee80211->queue_stop))) {
			skb = skb_dequeue(&(priv->ieee80211->skb_waitQ[queue_index]));
			if (skb)
				priv->ieee80211->softmac_hard_start_xmit(skb, dev);

			return; //modified by david to avoid further processing AMSDU
		}
	}

}

static void rtl8192_config_rate(struct net_device *dev, u16 *rate_config)
{
	struct r8192_priv *priv = ieee80211_priv(dev);
	struct ieee80211_network *net;
	u8 i = 0, basic_rate = 0;
	net = &priv->ieee80211->current_network;

	for (i = 0; i < net->rates_len; i++) {
		basic_rate = net->rates[i]&0x7f;
		switch (basic_rate) {
		case MGN_1M:
			*rate_config |= RRSR_1M;
			break;
		case MGN_2M:
			*rate_config |= RRSR_2M;
			break;
		case MGN_5_5M:
			*rate_config |= RRSR_5_5M;
			break;
		case MGN_11M:
			*rate_config |= RRSR_11M;
			break;
		case MGN_6M:
			*rate_config |= RRSR_6M;
			break;
		case MGN_9M:
			*rate_config |= RRSR_9M;
			break;
		case MGN_12M:
			*rate_config |= RRSR_12M;
			break;
		case MGN_18M:
			*rate_config |= RRSR_18M;
			break;
		case MGN_24M:
			*rate_config |= RRSR_24M;
			break;
		case MGN_36M:
			*rate_config |= RRSR_36M;
			break;
		case MGN_48M:
			*rate_config |= RRSR_48M;
			break;
		case MGN_54M:
			*rate_config |= RRSR_54M;
			break;
		}
	}
	for (i = 0; i < net->rates_ex_len; i++) {
		basic_rate = net->rates_ex[i]&0x7f;
		switch (basic_rate) {
		case MGN_1M:
			*rate_config |= RRSR_1M;
			break;
		case MGN_2M:
			*rate_config |= RRSR_2M;
			break;
		case MGN_5_5M:
			*rate_config |= RRSR_5_5M;
			break;
		case MGN_11M:
			*rate_config |= RRSR_11M;
			break;
		case MGN_6M:
			*rate_config |= RRSR_6M;
			break;
		case MGN_9M:
			*rate_config |= RRSR_9M;
			break;
		case MGN_12M:
			*rate_config |= RRSR_12M;
			break;
		case MGN_18M:
			*rate_config |= RRSR_18M;
			break;
		case MGN_24M:
			*rate_config |= RRSR_24M;
			break;
		case MGN_36M:
			*rate_config |= RRSR_36M;
			break;
		case MGN_48M:
			*rate_config |= RRSR_48M;
			break;
		case MGN_54M:
			*rate_config |= RRSR_54M;
			break;
		}
	}
}


#define SHORT_SLOT_TIME 9
#define NON_SHORT_SLOT_TIME 20

static void rtl8192_update_cap(struct net_device *dev, u16 cap)
{
	u32 tmp = 0;
	struct r8192_priv *priv = ieee80211_priv(dev);
	struct ieee80211_network *net = &priv->ieee80211->current_network;
	priv->short_preamble = cap & WLAN_CAPABILITY_SHORT_PREAMBLE;
	tmp = priv->basic_rate;
	if (priv->short_preamble)
		tmp |= BRSR_AckShortPmb;
	write_nic_dword(dev, RRSR, tmp);

	if (net->mode & (IEEE_G|IEEE_N_24G)) {
		u8 slot_time = 0;
		if ((cap & WLAN_CAPABILITY_SHORT_SLOT) && (!priv->ieee80211->pHTInfo->bCurrentRT2RTLongSlotTime)) /* short slot time */
			slot_time = SHORT_SLOT_TIME;
		else //long slot time
			slot_time = NON_SHORT_SLOT_TIME;
		priv->slot_time = slot_time;
		write_nic_byte(dev, SLOT_TIME, slot_time);
	}

}
static void rtl8192_net_update(struct net_device *dev)
{

	struct r8192_priv *priv = ieee80211_priv(dev);
	struct ieee80211_network *net;
	u16 BcnTimeCfg = 0, BcnCW = 6, BcnIFS = 0xf;
	u16 rate_config = 0;
	net = &priv->ieee80211->current_network;

	rtl8192_config_rate(dev, &rate_config);
	priv->basic_rate = rate_config & 0x15f;

	write_nic_dword(dev, BSSIDR, ((u32 *)net->bssid)[0]);
	write_nic_word(dev, BSSIDR+4, ((u16 *)net->bssid)[2]);

	rtl8192_update_msr(dev);
	if (priv->ieee80211->iw_mode == IW_MODE_ADHOC) {
		write_nic_word(dev, ATIMWND, 2);
		write_nic_word(dev, BCN_DMATIME, 1023);
		write_nic_word(dev, BCN_INTERVAL, net->beacon_interval);
		write_nic_word(dev, BCN_DRV_EARLY_INT, 1);
		write_nic_byte(dev, BCN_ERR_THRESH, 100);
		BcnTimeCfg |= (BcnCW<<BCN_TCFG_CW_SHIFT);
		// TODO: BcnIFS may required to be changed on ASIC
		BcnTimeCfg |= BcnIFS<<BCN_TCFG_IFS;

		write_nic_word(dev, BCN_TCFG, BcnTimeCfg);
	}


}

//temporary hw beacon is not used any more.
//open it when necessary
void rtl819xusb_beacon_tx(struct net_device *dev, u16  tx_rate)
{

}
inline u8 rtl8192_IsWirelessBMode(u16 rate)
{
	if (((rate <= 110) && (rate != 60) && (rate != 90)) || (rate == 220))
		return 1;
	else
		return 0;
}

u16 N_DBPSOfRate(u16 DataRate);


u16 N_DBPSOfRate(u16 DataRate)
{
	u16 N_DBPS = 24;

	switch (DataRate) {
	case 60:
		N_DBPS = 24;
		break;

	case 90:
		N_DBPS = 36;
		break;

	case 120:
		N_DBPS = 48;
		break;

	case 180:
		N_DBPS = 72;
		break;

	case 240:
		N_DBPS = 96;
		break;

	case 360:
		N_DBPS = 144;
		break;

	case 480:
		N_DBPS = 192;
		break;

	case 540:
		N_DBPS = 216;
		break;

	default:
		break;
	}

	return N_DBPS;
}

short rtl819xU_tx_cmd(struct net_device *dev, struct sk_buff *skb)
{
	struct r8192_priv *priv = ieee80211_priv(dev);
	int			status;
	struct urb		*tx_urb;
	unsigned int		idx_pipe;
	tx_desc_cmd_819x_usb *pdesc = (tx_desc_cmd_819x_usb *)skb->data;
	cb_desc *tcb_desc = (cb_desc *)(skb->cb + MAX_DEV_ADDR_SIZE);
	u8 queue_index = tcb_desc->queue_index;

	atomic_inc(&priv->tx_pending[queue_index]);
	tx_urb = usb_alloc_urb(0, GFP_ATOMIC);
	if (!tx_urb) {
		dev_kfree_skb(skb);
		return -ENOMEM;
	}

	memset(pdesc, 0, USB_HWDESC_HEADER_LEN);
	/* Tx descriptor ought to be set according to the skb->cb */
	pdesc->FirstSeg = 1;//bFirstSeg;
	pdesc->LastSeg = 1;//bLastSeg;
	pdesc->CmdInit = tcb_desc->bCmdOrInit;
	pdesc->TxBufferSize = tcb_desc->txbuf_size;
	pdesc->OWN = 1;
	pdesc->LINIP = tcb_desc->bLastIniPkt;

	//----------------------------------------------------------------------------
	// Fill up USB_OUT_CONTEXT.
	//----------------------------------------------------------------------------
	idx_pipe = 0x04;
	usb_fill_bulk_urb(tx_urb, priv->udev, usb_sndbulkpipe(priv->udev, idx_pipe),
			  skb->data, skb->len, rtl8192_tx_isr, skb);

	status = usb_submit_urb(tx_urb, GFP_ATOMIC);

	if (!status) {
		return 0;
	} else {
		DMESGE("Error TX CMD URB, error %d", status);
		return -1;
	}
}

/*
 * Mapping Software/Hardware descriptor queue id to "Queue Select Field"
 * in TxFwInfo data structure
 * 2006.10.30 by Emily
 *
 * \param QUEUEID       Software Queue
*/
static u8 MapHwQueueToFirmwareQueue(u8 QueueID)
{
	u8 QueueSelect = 0x0;       //defualt set to

	switch (QueueID) {
	case BE_QUEUE:
		QueueSelect = QSLT_BE;
		break;

	case BK_QUEUE:
		QueueSelect = QSLT_BK;
		break;

	case VO_QUEUE:
		QueueSelect = QSLT_VO;
		break;

	case VI_QUEUE:
		QueueSelect = QSLT_VI;
		break;
	case MGNT_QUEUE:
		QueueSelect = QSLT_MGNT;
		break;

	case BEACON_QUEUE:
		QueueSelect = QSLT_BEACON;
		break;

		// TODO: 2006.10.30 mark other queue selection until we verify it is OK
		// TODO: Remove Assertions
	case TXCMD_QUEUE:
		QueueSelect = QSLT_CMD;
		break;
	case HIGH_QUEUE:
		QueueSelect = QSLT_HIGH;
		break;

	default:
		RT_TRACE(COMP_ERR, "TransmitTCB(): Impossible Queue Selection: %d \n", QueueID);
		break;
	}
	return QueueSelect;
}

static u8 MRateToHwRate8190Pci(u8 rate)
{
	u8  ret = DESC90_RATE1M;

	switch (rate) {
	case MGN_1M:
		ret = DESC90_RATE1M;
		break;
	case MGN_2M:
		ret = DESC90_RATE2M;
		break;
	case MGN_5_5M:
		ret = DESC90_RATE5_5M;
		break;
	case MGN_11M:
		ret = DESC90_RATE11M;
		break;
	case MGN_6M:
		ret = DESC90_RATE6M;
		break;
	case MGN_9M:
		ret = DESC90_RATE9M;
		break;
	case MGN_12M:
		ret = DESC90_RATE12M;
		break;
	case MGN_18M:
		ret = DESC90_RATE18M;
		break;
	case MGN_24M:
		ret = DESC90_RATE24M;
		break;
	case MGN_36M:
		ret = DESC90_RATE36M;
		break;
	case MGN_48M:
		ret = DESC90_RATE48M;
		break;
	case MGN_54M:
		ret = DESC90_RATE54M;
		break;

	/* HT rate since here */
	case MGN_MCS0:
		ret = DESC90_RATEMCS0;
		break;
	case MGN_MCS1:
		ret = DESC90_RATEMCS1;
		break;
	case MGN_MCS2:
		ret = DESC90_RATEMCS2;
		break;
	case MGN_MCS3:
		ret = DESC90_RATEMCS3;
		break;
	case MGN_MCS4:
		ret = DESC90_RATEMCS4;
		break;
	case MGN_MCS5:
		ret = DESC90_RATEMCS5;
		break;
	case MGN_MCS6:
		ret = DESC90_RATEMCS6;
		break;
	case MGN_MCS7:
		ret = DESC90_RATEMCS7;
		break;
	case MGN_MCS8:
		ret = DESC90_RATEMCS8;
		break;
	case MGN_MCS9:
		ret = DESC90_RATEMCS9;
		break;
	case MGN_MCS10:
		ret = DESC90_RATEMCS10;
		break;
	case MGN_MCS11:
		ret = DESC90_RATEMCS11;
		break;
	case MGN_MCS12:
		ret = DESC90_RATEMCS12;
		break;
	case MGN_MCS13:
		ret = DESC90_RATEMCS13;
		break;
	case MGN_MCS14:
		ret = DESC90_RATEMCS14;
		break;
	case MGN_MCS15:
		ret = DESC90_RATEMCS15;
		break;
	case (0x80|0x20):
		ret = DESC90_RATEMCS32;
		break;

	default:
		break;
	}
	return ret;
}


static u8 QueryIsShort(u8 TxHT, u8 TxRate, cb_desc *tcb_desc)
{
	u8   tmp_Short;

	tmp_Short = (TxHT == 1) ? ((tcb_desc->bUseShortGI) ? 1 : 0) : ((tcb_desc->bUseShortPreamble) ? 1 : 0);

	if (TxHT == 1 && TxRate != DESC90_RATEMCS15)
		tmp_Short = 0;

	return tmp_Short;
}

static void tx_zero_isr(struct urb *tx_urb)
{
	return;
}

/*
 * The tx procedure is just as following,
 * skb->cb will contain all the following information,
 * priority, morefrag, rate, &dev.
 * */
short rtl8192_tx(struct net_device *dev, struct sk_buff *skb)
{
	struct r8192_priv *priv = ieee80211_priv(dev);
	cb_desc *tcb_desc = (cb_desc *)(skb->cb + MAX_DEV_ADDR_SIZE);
	tx_desc_819x_usb *tx_desc = (tx_desc_819x_usb *)skb->data;
	tx_fwinfo_819x_usb *tx_fwinfo = (tx_fwinfo_819x_usb *)(skb->data + USB_HWDESC_HEADER_LEN);
	struct usb_device *udev = priv->udev;
	int pend;
	int status;
	struct urb *tx_urb = NULL, *tx_urb_zero = NULL;
	unsigned int idx_pipe;
	pend = atomic_read(&priv->tx_pending[tcb_desc->queue_index]);
	/* we are locked here so the two atomic_read and inc are executed
	 * without interleaves
	 * !!! For debug purpose
	 */
	if (pend > MAX_TX_URB) {
		netdev_dbg(dev, "To discard skb packet!\n");
		dev_kfree_skb_any(skb);
		return -1;
	}

	tx_urb = usb_alloc_urb(0, GFP_ATOMIC);
	if (!tx_urb) {
		dev_kfree_skb_any(skb);
		return -ENOMEM;
	}

	/* Fill Tx firmware info */
	memset(tx_fwinfo, 0, sizeof(tx_fwinfo_819x_usb));
	/* DWORD 0 */
	tx_fwinfo->TxHT = (tcb_desc->data_rate&0x80) ? 1 : 0;
	tx_fwinfo->TxRate = MRateToHwRate8190Pci(tcb_desc->data_rate);
	tx_fwinfo->EnableCPUDur = tcb_desc->bTxEnableFwCalcDur;
	tx_fwinfo->Short = QueryIsShort(tx_fwinfo->TxHT, tx_fwinfo->TxRate, tcb_desc);
	if (tcb_desc->bAMPDUEnable) { /* AMPDU enabled */
		tx_fwinfo->AllowAggregation = 1;
		/* DWORD 1 */
		tx_fwinfo->RxMF = tcb_desc->ampdu_factor;
		tx_fwinfo->RxAMD = tcb_desc->ampdu_density&0x07;//ampdudensity
	} else {
		tx_fwinfo->AllowAggregation = 0;
		/* DWORD 1 */
		tx_fwinfo->RxMF = 0;
		tx_fwinfo->RxAMD = 0;
	}

	/* Protection mode related */
	tx_fwinfo->RtsEnable = (tcb_desc->bRTSEnable) ? 1 : 0;
	tx_fwinfo->CtsEnable = (tcb_desc->bCTSEnable) ? 1 : 0;
	tx_fwinfo->RtsSTBC = (tcb_desc->bRTSSTBC) ? 1 : 0;
	tx_fwinfo->RtsHT = (tcb_desc->rts_rate&0x80) ? 1 : 0;
	tx_fwinfo->RtsRate =  MRateToHwRate8190Pci((u8)tcb_desc->rts_rate);
	tx_fwinfo->RtsSubcarrier = (tx_fwinfo->RtsHT == 0) ? (tcb_desc->RTSSC) : 0;
	tx_fwinfo->RtsBandwidth = (tx_fwinfo->RtsHT == 1) ? ((tcb_desc->bRTSBW) ? 1 : 0) : 0;
	tx_fwinfo->RtsShort = (tx_fwinfo->RtsHT == 0) ? (tcb_desc->bRTSUseShortPreamble ? 1 : 0) :
		              (tcb_desc->bRTSUseShortGI ? 1 : 0);

	/* Set Bandwidth and sub-channel settings. */
	if (priv->CurrentChannelBW == HT_CHANNEL_WIDTH_20_40) {
		if (tcb_desc->bPacketBW) {
			tx_fwinfo->TxBandwidth = 1;
			tx_fwinfo->TxSubCarrier = 0;    //By SD3's Jerry suggestion, use duplicated mode
		} else {
			tx_fwinfo->TxBandwidth = 0;
			tx_fwinfo->TxSubCarrier = priv->nCur40MhzPrimeSC;
		}
	} else {
		tx_fwinfo->TxBandwidth = 0;
		tx_fwinfo->TxSubCarrier = 0;
	}

	/* Fill Tx descriptor */
	memset(tx_desc, 0, sizeof(tx_desc_819x_usb));
	/* DWORD 0 */
	tx_desc->LINIP = 0;
	tx_desc->CmdInit = 1;
	tx_desc->Offset =  sizeof(tx_fwinfo_819x_usb) + 8;
	tx_desc->PktSize = (skb->len - TX_PACKET_SHIFT_BYTES) & 0xffff;

	/*DWORD 1*/
	tx_desc->SecCAMID = 0;
	tx_desc->RATid = tcb_desc->RATRIndex;
	tx_desc->NoEnc = 1;
	tx_desc->SecType = 0x0;
	if (tcb_desc->bHwSec) {
		switch (priv->ieee80211->pairwise_key_type) {
		case KEY_TYPE_WEP40:
		case KEY_TYPE_WEP104:
			tx_desc->SecType = 0x1;
			tx_desc->NoEnc = 0;
			break;
		case KEY_TYPE_TKIP:
			tx_desc->SecType = 0x2;
			tx_desc->NoEnc = 0;
			break;
		case KEY_TYPE_CCMP:
			tx_desc->SecType = 0x3;
			tx_desc->NoEnc = 0;
			break;
		case KEY_TYPE_NA:
			tx_desc->SecType = 0x0;
			tx_desc->NoEnc = 1;
			break;
		}
	}

	tx_desc->QueueSelect = MapHwQueueToFirmwareQueue(tcb_desc->queue_index);
	tx_desc->TxFWInfoSize =  sizeof(tx_fwinfo_819x_usb);

	tx_desc->DISFB = tcb_desc->bTxDisableRateFallBack;
	tx_desc->USERATE = tcb_desc->bTxUseDriverAssingedRate;

	/* Fill fields that are required to be initialized in all of the descriptors */
	//DWORD 0
	tx_desc->FirstSeg = 1;
	tx_desc->LastSeg = 1;
	tx_desc->OWN = 1;

	/* DWORD 2 */
	tx_desc->TxBufferSize = (u32)(skb->len - USB_HWDESC_HEADER_LEN);
	idx_pipe = 0x5;

	/* To submit bulk urb */
	usb_fill_bulk_urb(tx_urb, udev,
			  usb_sndbulkpipe(udev, idx_pipe), skb->data,
			  skb->len, rtl8192_tx_isr, skb);

	status = usb_submit_urb(tx_urb, GFP_ATOMIC);
	if (!status) {
		//we need to send 0 byte packet whenever 512N bytes/64N(HIGN SPEED/NORMAL SPEED) bytes packet has been transmitted. Otherwise, it will be halt to wait for another packet. WB. 2008.08.27
		bool bSend0Byte = false;
		u8 zero = 0;
		if (udev->speed == USB_SPEED_HIGH) {
			if (skb->len > 0 && skb->len % 512 == 0)
				bSend0Byte = true;
		} else {
			if (skb->len > 0 && skb->len % 64 == 0)
				bSend0Byte = true;
		}
		if (bSend0Byte) {
			tx_urb_zero = usb_alloc_urb(0, GFP_ATOMIC);
			if (!tx_urb_zero) {
				RT_TRACE(COMP_ERR, "can't alloc urb for zero byte\n");
				return -ENOMEM;
			}
			usb_fill_bulk_urb(tx_urb_zero, udev,
					  usb_sndbulkpipe(udev, idx_pipe), &zero,
					  0, tx_zero_isr, dev);
			status = usb_submit_urb(tx_urb_zero, GFP_ATOMIC);
			if (status) {
				RT_TRACE(COMP_ERR, "Error TX URB for zero byte %d, error %d", atomic_read(&priv->tx_pending[tcb_desc->queue_index]), status);
				return -1;
			}
		}
		dev->trans_start = jiffies;
		atomic_inc(&priv->tx_pending[tcb_desc->queue_index]);
		return 0;
	} else {
		RT_TRACE(COMP_ERR, "Error TX URB %d, error %d", atomic_read(&priv->tx_pending[tcb_desc->queue_index]),
			 status);
		return -1;
	}
}

static short rtl8192_usb_initendpoints(struct net_device *dev)
{
	struct r8192_priv *priv = ieee80211_priv(dev);

	priv->rx_urb = kmalloc(sizeof(struct urb *) * (MAX_RX_URB+1),
			       GFP_KERNEL);
	if (priv->rx_urb == NULL)
		return -ENOMEM;

#ifndef JACKSON_NEW_RX
	for (i = 0; i < (MAX_RX_URB+1); i++) {

		priv->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL);

		priv->rx_urb[i]->transfer_buffer = kmalloc(RX_URB_SIZE, GFP_KERNEL);

		priv->rx_urb[i]->transfer_buffer_length = RX_URB_SIZE;
	}
#endif

#ifdef THOMAS_BEACON
	{
		long align = 0;
		void *oldaddr, *newaddr;

		priv->rx_urb[16] = usb_alloc_urb(0, GFP_KERNEL);
		priv->oldaddr = kmalloc(16, GFP_KERNEL);
		oldaddr = priv->oldaddr;
		align = ((long)oldaddr) & 3;
		if (align) {
			newaddr = oldaddr + 4 - align;
			priv->rx_urb[16]->transfer_buffer_length = 16 - 4 + align;
		} else {
			newaddr = oldaddr;
			priv->rx_urb[16]->transfer_buffer_length = 16;
		}
		priv->rx_urb[16]->transfer_buffer = newaddr;
	}
#endif

	memset(priv->rx_urb, 0, sizeof(struct urb *) * MAX_RX_URB);
	priv->pp_rxskb = kcalloc(MAX_RX_URB, sizeof(struct sk_buff *),
				 GFP_KERNEL);
	if (!priv->pp_rxskb) {
		kfree(priv->rx_urb);

		priv->pp_rxskb = NULL;
		priv->rx_urb = NULL;

		DMESGE("Endpoint Alloc Failure");
		return -ENOMEM;
	}

	netdev_dbg(dev, "End of initendpoints\n");
	return 0;

}
#ifdef THOMAS_BEACON
static void rtl8192_usb_deleteendpoints(struct net_device *dev)
{
	int i;
	struct r8192_priv *priv = ieee80211_priv(dev);

	if (priv->rx_urb) {
		for (i = 0; i < (MAX_RX_URB+1); i++) {
			usb_kill_urb(priv->rx_urb[i]);
			usb_free_urb(priv->rx_urb[i]);
		}
		kfree(priv->rx_urb);
		priv->rx_urb = NULL;
	}
	kfree(priv->oldaddr);
	priv->oldaddr = NULL;
	if (priv->pp_rxskb) {
		kfree(priv->pp_rxskb);
		priv->pp_rxskb = NULL;
	}
}
#else
void rtl8192_usb_deleteendpoints(struct net_device *dev)
{
	int i;
	struct r8192_priv *priv = ieee80211_priv(dev);

#ifndef JACKSON_NEW_RX

	if (priv->rx_urb) {
		for (i = 0; i < (MAX_RX_URB+1); i++) {
			usb_kill_urb(priv->rx_urb[i]);
			kfree(priv->rx_urb[i]->transfer_buffer);
			usb_free_urb(priv->rx_urb[i]);
		}
		kfree(priv->rx_urb);
		priv->rx_urb = NULL;

	}
#else
	kfree(priv->rx_urb);
	priv->rx_urb = NULL;
	kfree(priv->oldaddr);
	priv->oldaddr = NULL;
	if (priv->pp_rxskb) {
		kfree(priv->pp_rxskb);
		priv->pp_rxskb = 0;

	}

#endif
}
#endif

extern void rtl8192_update_ratr_table(struct net_device *dev);
static void rtl8192_link_change(struct net_device *dev)
{
	struct r8192_priv *priv = ieee80211_priv(dev);
	struct ieee80211_device *ieee = priv->ieee80211;
	if (ieee->state == IEEE80211_LINKED) {
		rtl8192_net_update(dev);
		rtl8192_update_ratr_table(dev);
		//add this as in pure N mode, wep encryption will use software way, but there is no chance to set this as wep will not set group key in wext. WB.2008.07.08
		if ((KEY_TYPE_WEP40 == ieee->pairwise_key_type) || (KEY_TYPE_WEP104 == ieee->pairwise_key_type))
			EnableHWSecurityConfig8192(dev);
	}
	/*update timing params*/
	if (ieee->iw_mode == IW_MODE_INFRA || ieee->iw_mode == IW_MODE_ADHOC) {
		u32 reg = 0;
		read_nic_dword(dev, RCR, &reg);
		if (priv->ieee80211->state == IEEE80211_LINKED)
			priv->ReceiveConfig = reg |= RCR_CBSSID;
		else
			priv->ReceiveConfig = reg &= ~RCR_CBSSID;
		write_nic_dword(dev, RCR, reg);
	}
}

static struct ieee80211_qos_parameters def_qos_parameters = {
	{3, 3, 3, 3},/* cw_min */
	{7, 7, 7, 7},/* cw_max */
	{2, 2, 2, 2},/* aifs */
	{0, 0, 0, 0},/* flags */
	{0, 0, 0, 0} /* tx_op_limit */
};


static void rtl8192_update_beacon(struct work_struct *work)
{
	struct r8192_priv *priv = container_of(work, struct r8192_priv, update_beacon_wq.work);
	struct net_device *dev = priv->ieee80211->dev;
	struct ieee80211_device *ieee = priv->ieee80211;
	struct ieee80211_network *net = &ieee->current_network;

	if (ieee->pHTInfo->bCurrentHTSupport)
		HTUpdateSelfAndPeerSetting(ieee, net);
	ieee->pHTInfo->bCurrentRT2RTLongSlotTime = net->bssht.bdRT2RTLongSlotTime;
	rtl8192_update_cap(dev, net->capability);
}
/*
* background support to run QoS activate functionality
*/
static int WDCAPARA_ADD[] = {EDCAPARA_BE, EDCAPARA_BK, EDCAPARA_VI, EDCAPARA_VO};
static void rtl8192_qos_activate(struct work_struct *work)
{
	struct r8192_priv *priv = container_of(work, struct r8192_priv, qos_activate);
	struct net_device *dev = priv->ieee80211->dev;
	struct ieee80211_qos_parameters *qos_parameters = &priv->ieee80211->current_network.qos_data.parameters;
	u8 mode = priv->ieee80211->current_network.mode;
	u8  u1bAIFS;
	u32 u4bAcParam;
	int i;

	mutex_lock(&priv->mutex);
	if (priv->ieee80211->state != IEEE80211_LINKED)
		goto success;
	RT_TRACE(COMP_QOS, "qos active process with associate response received\n");
	/* It better set slot time at first */
	/* For we just support b/g mode at present, let the slot time at 9/20 selection */
	/* update the ac parameter to related registers */
	for (i = 0; i <  QOS_QUEUE_NUM; i++) {
		//Mode G/A: slotTimeTimer = 9; Mode B: 20
		u1bAIFS = qos_parameters->aifs[i] * ((mode&(IEEE_G|IEEE_N_24G)) ? 9 : 20) + aSifsTime;
		u4bAcParam = ((((u32)(qos_parameters->tx_op_limit[i]))<< AC_PARAM_TXOP_LIMIT_OFFSET)|
			      (((u32)(qos_parameters->cw_max[i]))<< AC_PARAM_ECW_MAX_OFFSET)|
			      (((u32)(qos_parameters->cw_min[i]))<< AC_PARAM_ECW_MIN_OFFSET)|
			      ((u32)u1bAIFS << AC_PARAM_AIFS_OFFSET));

		write_nic_dword(dev, WDCAPARA_ADD[i], u4bAcParam);
	}

success:
	mutex_unlock(&priv->mutex);
}

static int rtl8192_qos_handle_probe_response(struct r8192_priv *priv,
					     int active_network,
					     struct ieee80211_network *network)
{
	int ret = 0;
	u32 size = sizeof(struct ieee80211_qos_parameters);

	if (priv->ieee80211->state != IEEE80211_LINKED)
		return ret;

	if ((priv->ieee80211->iw_mode != IW_MODE_INFRA))
		return ret;

	if (network->flags & NETWORK_HAS_QOS_MASK) {
		if (active_network &&
		    (network->flags & NETWORK_HAS_QOS_PARAMETERS))
			network->qos_data.active = network->qos_data.supported;

		if ((network->qos_data.active == 1) && (active_network == 1) &&
		    (network->flags & NETWORK_HAS_QOS_PARAMETERS) &&
		    (network->qos_data.old_param_count !=
		     network->qos_data.param_count)) {
			network->qos_data.old_param_count =
				network->qos_data.param_count;
			queue_work(priv->priv_wq, &priv->qos_activate);
			RT_TRACE(COMP_QOS, "QoS parameters change call "
				 "qos_activate\n");
		}
	} else {
		memcpy(&priv->ieee80211->current_network.qos_data.parameters,
		       &def_qos_parameters, size);

		if ((network->qos_data.active == 1) && (active_network == 1)) {
			queue_work(priv->priv_wq, &priv->qos_activate);
			RT_TRACE(COMP_QOS, "QoS was disabled call qos_activate \n");
		}
		network->qos_data.active = 0;
		network->qos_data.supported = 0;
	}

	return 0;
}

/* handle and manage frame from beacon and probe response */
static int rtl8192_handle_beacon(struct net_device *dev,
				 struct ieee80211_beacon *beacon,
				 struct ieee80211_network *network)
{
	struct r8192_priv *priv = ieee80211_priv(dev);

	rtl8192_qos_handle_probe_response(priv, 1, network);
	queue_delayed_work(priv->priv_wq, &priv->update_beacon_wq, 0);
	return 0;

}

/*
* handling the beaconing responses. if we get different QoS setting
* off the network from the associated setting, adjust the QoS
* setting
*/
static int rtl8192_qos_association_resp(struct r8192_priv *priv,
					struct ieee80211_network *network)
{
	unsigned long flags;
	u32 size = sizeof(struct ieee80211_qos_parameters);
	int set_qos_param = 0;

	if ((priv == NULL) || (network == NULL))
		return 0;

	if (priv->ieee80211->state != IEEE80211_LINKED)
		return 0;

	if ((priv->ieee80211->iw_mode != IW_MODE_INFRA))
		return 0;

	spin_lock_irqsave(&priv->ieee80211->lock, flags);
	if (network->flags & NETWORK_HAS_QOS_PARAMETERS) {
		memcpy(&priv->ieee80211->current_network.qos_data.parameters,
		       &network->qos_data.parameters,
		       sizeof(struct ieee80211_qos_parameters));
		priv->ieee80211->current_network.qos_data.active = 1;
		set_qos_param = 1;
		/* update qos parameter for current network */
		priv->ieee80211->current_network.qos_data.old_param_count =
			priv->ieee80211->current_network.qos_data.param_count;
		priv->ieee80211->current_network.qos_data.param_count =
			network->qos_data.param_count;
	} else {
		memcpy(&priv->ieee80211->current_network.qos_data.parameters,
		       &def_qos_parameters, size);
		priv->ieee80211->current_network.qos_data.active = 0;
		priv->ieee80211->current_network.qos_data.supported = 0;
		set_qos_param = 1;
	}

	spin_unlock_irqrestore(&priv->ieee80211->lock, flags);

	RT_TRACE(COMP_QOS, "%s: network->flags = %d,%d\n", __func__, network->flags, priv->ieee80211->current_network.qos_data.active);
	if (set_qos_param == 1)
		queue_work(priv->priv_wq, &priv->qos_activate);


	return 0;
}


static int rtl8192_handle_assoc_response(struct net_device *dev,
					 struct ieee80211_assoc_response_frame *resp,
					 struct ieee80211_network *network)
{
	struct r8192_priv *priv = ieee80211_priv(dev);
	rtl8192_qos_association_resp(priv, network);
	return 0;
}


void rtl8192_update_ratr_table(struct net_device *dev)
{
	struct r8192_priv *priv = ieee80211_priv(dev);
	struct ieee80211_device *ieee = priv->ieee80211;
	u8 *pMcsRate = ieee->dot11HTOperationalRateSet;
	u32 ratr_value = 0;
	u8 rate_index = 0;
	rtl8192_config_rate(dev, (u16 *)(&ratr_value));
	ratr_value |= (*(u16 *)(pMcsRate)) << 12;
	switch (ieee->mode) {
	case IEEE_A:
		ratr_value &= 0x00000FF0;
		break;
	case IEEE_B:
		ratr_value &= 0x0000000F;
		break;
	case IEEE_G:
		ratr_value &= 0x00000FF7;
		break;
	case IEEE_N_24G:
	case IEEE_N_5G:
		if (ieee->pHTInfo->PeerMimoPs == 0) { /* MIMO_PS_STATIC */
			ratr_value &= 0x0007F007;
		} else {
			if (priv->rf_type == RF_1T2R)
				ratr_value &= 0x000FF007;
			else
				ratr_value &= 0x0F81F007;
		}
		break;
	default:
		break;
	}
	ratr_value &= 0x0FFFFFFF;
	if (ieee->pHTInfo->bCurTxBW40MHz && ieee->pHTInfo->bCurShortGI40MHz)
		ratr_value |= 0x80000000;
	else if (!ieee->pHTInfo->bCurTxBW40MHz && ieee->pHTInfo->bCurShortGI20MHz)
		ratr_value |= 0x80000000;
	write_nic_dword(dev, RATR0+rate_index*4, ratr_value);
	write_nic_byte(dev, UFWP, 1);
}

static u8 ccmp_ie[4] = {0x00, 0x50, 0xf2, 0x04};
static u8 ccmp_rsn_ie[4] = {0x00, 0x0f, 0xac, 0x04};
static bool GetNmodeSupportBySecCfg8192(struct net_device *dev)
{
	struct r8192_priv *priv = ieee80211_priv(dev);
	struct ieee80211_device *ieee = priv->ieee80211;
	struct ieee80211_network *network = &ieee->current_network;
	int wpa_ie_len = ieee->wpa_ie_len;
	struct ieee80211_crypt_data *crypt;
	int encrypt;

	crypt = ieee->crypt[ieee->tx_keyidx];
	//we use connecting AP's capability instead of only security config on our driver to distinguish whether it should use N mode or G mode
	encrypt = (network->capability & WLAN_CAPABILITY_PRIVACY) || (ieee->host_encrypt && crypt && crypt->ops && (0 == strcmp(crypt->ops->name, "WEP")));

	/* simply judge  */
	if (encrypt && (wpa_ie_len == 0)) {
		/* wep encryption, no N mode setting */
		return false;
	} else if ((wpa_ie_len != 0)) {
		/* parse pairwise key type */
		if (((ieee->wpa_ie[0] == 0xdd) && (!memcmp(&(ieee->wpa_ie[14]), ccmp_ie, 4))) || ((ieee->wpa_ie[0] == 0x30) && (!memcmp(&ieee->wpa_ie[10], ccmp_rsn_ie, 4))))
			return true;
		else
			return false;
	} else {
		return true;
	}

	return true;
}

static bool GetHalfNmodeSupportByAPs819xUsb(struct net_device *dev)
{
	bool			Reval;
	struct r8192_priv *priv = ieee80211_priv(dev);
	struct ieee80211_device *ieee = priv->ieee80211;

	if (ieee->bHalfWirelessN24GMode == true)
		Reval = true;
	else
		Reval =  false;

	return Reval;
}

static void rtl8192_refresh_supportrate(struct r8192_priv *priv)
{
	struct ieee80211_device *ieee = priv->ieee80211;
	//we do not consider set support rate for ABG mode, only HT MCS rate is set here.
	if (ieee->mode == WIRELESS_MODE_N_24G || ieee->mode == WIRELESS_MODE_N_5G)
		memcpy(ieee->Regdot11HTOperationalRateSet, ieee->RegHTSuppRateSet, 16);
	else
		memset(ieee->Regdot11HTOperationalRateSet, 0, 16);
	return;
}

static u8 rtl8192_getSupportedWireleeMode(struct net_device *dev)
{
	struct r8192_priv *priv = ieee80211_priv(dev);
	u8 ret = 0;
	switch (priv->rf_chip) {
	case RF_8225:
	case RF_8256:
	case RF_PSEUDO_11N:
		ret = (WIRELESS_MODE_N_24G|WIRELESS_MODE_G|WIRELESS_MODE_B);
		break;
	case RF_8258:
		ret = (WIRELESS_MODE_A|WIRELESS_MODE_N_5G);
		break;
	default:
		ret = WIRELESS_MODE_B;
		break;
	}
	return ret;
}
static void rtl8192_SetWirelessMode(struct net_device *dev, u8 wireless_mode)
{
	struct r8192_priv *priv = ieee80211_priv(dev);
	u8 bSupportMode = rtl8192_getSupportedWireleeMode(dev);

	if ((wireless_mode == WIRELESS_MODE_AUTO) || ((wireless_mode&bSupportMode) == 0)) {
		if (bSupportMode & WIRELESS_MODE_N_24G) {
			wireless_mode = WIRELESS_MODE_N_24G;
		} else if (bSupportMode & WIRELESS_MODE_N_5G) {
			wireless_mode = WIRELESS_MODE_N_5G;
		} else if ((bSupportMode & WIRELESS_MODE_A)) {
			wireless_mode = WIRELESS_MODE_A;
		} else if ((bSupportMode & WIRELESS_MODE_G)) {
			wireless_mode = WIRELESS_MODE_G;
		} else if ((bSupportMode & WIRELESS_MODE_B)) {
			wireless_mode = WIRELESS_MODE_B;
		} else {
			RT_TRACE(COMP_ERR, "%s(), No valid wireless mode supported, SupportedWirelessMode(%x)!!!\n", __func__, bSupportMode);
			wireless_mode = WIRELESS_MODE_B;
		}
	}
#ifdef TO_DO_LIST //// TODO: this function doesn't work well at this time, we should wait for FPGA
	ActUpdateChannelAccessSetting(pAdapter, pHalData->CurrentWirelessMode, &pAdapter->MgntInfo.Info8185.ChannelAccessSetting);
#endif
	priv->ieee80211->mode = wireless_mode;

	if ((wireless_mode == WIRELESS_MODE_N_24G) ||  (wireless_mode == WIRELESS_MODE_N_5G))
		priv->ieee80211->pHTInfo->bEnableHT = 1;
	else
		priv->ieee80211->pHTInfo->bEnableHT = 0;
	RT_TRACE(COMP_INIT, "Current Wireless Mode is %x\n", wireless_mode);
	rtl8192_refresh_supportrate(priv);

}
//init priv variables here. only non_zero value should be initialized here.
static void rtl8192_init_priv_variable(struct net_device *dev)
{
	struct r8192_priv *priv = ieee80211_priv(dev);
	u8 i;
	priv->card_8192 = NIC_8192U;
	priv->chan = 1; //set to channel 1
	priv->ieee80211->mode = WIRELESS_MODE_AUTO; //SET AUTO
	priv->ieee80211->iw_mode = IW_MODE_INFRA;
	priv->ieee80211->ieee_up = 0;
	priv->retry_rts = DEFAULT_RETRY_RTS;
	priv->retry_data = DEFAULT_RETRY_DATA;
	priv->ieee80211->rts = DEFAULT_RTS_THRESHOLD;
	priv->ieee80211->rate = 110; //11 mbps
	priv->ieee80211->short_slot = 1;
	priv->promisc = (dev->flags & IFF_PROMISC) ? 1 : 0;
	priv->CckPwEnl = 6;
	//for silent reset
	priv->IrpPendingCount = 1;
	priv->ResetProgress = RESET_TYPE_NORESET;
	priv->bForcedSilentReset = 0;
	priv->bDisableNormalResetCheck = false;
	priv->force_reset = false;

	priv->ieee80211->FwRWRF = 0;	//we don't use FW read/write RF until stable firmware is available.
	priv->ieee80211->current_network.beacon_interval = DEFAULT_BEACONINTERVAL;
	priv->ieee80211->softmac_features  = IEEE_SOFTMAC_SCAN |
		IEEE_SOFTMAC_ASSOCIATE | IEEE_SOFTMAC_PROBERQ |
		IEEE_SOFTMAC_PROBERS | IEEE_SOFTMAC_TX_QUEUE |
		IEEE_SOFTMAC_BEACONS;//added by amy 080604

	priv->ieee80211->active_scan = 1;
	priv->ieee80211->modulation = IEEE80211_CCK_MODULATION | IEEE80211_OFDM_MODULATION;
	priv->ieee80211->host_encrypt = 1;
	priv->ieee80211->host_decrypt = 1;
	priv->ieee80211->start_send_beacons = NULL; //-by amy 080604
	priv->ieee80211->stop_send_beacons = NULL;  //-by amy 080604
	priv->ieee80211->softmac_hard_start_xmit = rtl8192_hard_start_xmit;
	priv->ieee80211->set_chan = rtl8192_set_chan;
	priv->ieee80211->link_change = rtl8192_link_change;
	priv->ieee80211->softmac_data_hard_start_xmit = rtl8192_hard_data_xmit;
	priv->ieee80211->data_hard_stop = rtl8192_data_hard_stop;
	priv->ieee80211->data_hard_resume = rtl8192_data_hard_resume;
	priv->ieee80211->init_wmmparam_flag = 0;
	priv->ieee80211->fts = DEFAULT_FRAG_THRESHOLD;
	priv->ieee80211->check_nic_enough_desc = check_nic_enough_desc;
	priv->ieee80211->tx_headroom = TX_PACKET_SHIFT_BYTES;
	priv->ieee80211->qos_support = 1;

	//added by WB
	priv->ieee80211->SetBWModeHandler = rtl8192_SetBWMode;
	priv->ieee80211->handle_assoc_response = rtl8192_handle_assoc_response;
	priv->ieee80211->handle_beacon = rtl8192_handle_beacon;
	//added by david
	priv->ieee80211->GetNmodeSupportBySecCfg = GetNmodeSupportBySecCfg8192;
	priv->ieee80211->GetHalfNmodeSupportByAPsHandler = GetHalfNmodeSupportByAPs819xUsb;
	priv->ieee80211->SetWirelessMode = rtl8192_SetWirelessMode;
	//added by amy
	priv->ieee80211->InitialGainHandler = InitialGain819xUsb;
	priv->card_type = USB;
#ifdef TO_DO_LIST
	if (Adapter->bInHctTest) {
		pHalData->ShortRetryLimit = 7;
		pHalData->LongRetryLimit = 7;
	}
#endif
	priv->ShortRetryLimit = 0x30;
	priv->LongRetryLimit = 0x30;
	priv->EarlyRxThreshold = 7;
	priv->enable_gpio0 = 0;
	priv->TransmitConfig =
		(TCR_MXDMA_2048<<TCR_MXDMA_OFFSET)|  // Max DMA Burst Size per Tx DMA Burst, 7: reserved.
		(priv->ShortRetryLimit<<TCR_SRL_OFFSET)|	// Short retry limit
		(priv->LongRetryLimit<<TCR_LRL_OFFSET) |	// Long retry limit
		(false ? TCR_SAT : 0);	// FALSE: HW provides PLCP length and LENGEXT, TRUE: SW provides them
#ifdef TO_DO_LIST
	if (Adapter->bInHctTest)
		pHalData->ReceiveConfig	=	pHalData->CSMethod |
						RCR_AMF | RCR_ADF |	//accept management/data
						//guangan200710
						RCR_ACF |	//accept control frame for SW AP needs PS-poll, 2005.07.07, by rcnjko.
						RCR_AB | RCR_AM | RCR_APM |		//accept BC/MC/UC
						RCR_AICV | RCR_ACRC32 |			//accept ICV/CRC error packet
						((u32)7<<RCR_MXDMA_OFFSET) | // Max DMA Burst Size per Rx DMA Burst, 7: unlimited.
						(pHalData->EarlyRxThreshold<<RCR_FIFO_OFFSET) | // Rx FIFO Threshold, 7: No Rx threshold.
						(pHalData->EarlyRxThreshold == 7 ? RCR_OnlyErlPkt : 0);
	else

#endif
	priv->ReceiveConfig	=
		RCR_AMF | RCR_ADF |		//accept management/data
		RCR_ACF |			//accept control frame for SW AP needs PS-poll, 2005.07.07, by rcnjko.
		RCR_AB | RCR_AM | RCR_APM |	//accept BC/MC/UC
		((u32)7<<RCR_MXDMA_OFFSET)| // Max DMA Burst Size per Rx DMA Burst, 7: unlimited.
		(priv->EarlyRxThreshold<<RX_FIFO_THRESHOLD_SHIFT) | // Rx FIFO Threshold, 7: No Rx threshold.
		(priv->EarlyRxThreshold == 7 ? RCR_ONLYERLPKT : 0);

	priv->AcmControl = 0;
	priv->pFirmware = kzalloc(sizeof(rt_firmware), GFP_KERNEL);

	/* rx related queue */
	skb_queue_head_init(&priv->rx_queue);
	skb_queue_head_init(&priv->skb_queue);

	/* Tx related queue */
	for (i = 0; i < MAX_QUEUE_SIZE; i++)
		skb_queue_head_init(&priv->ieee80211->skb_waitQ[i]);
	for (i = 0; i < MAX_QUEUE_SIZE; i++)
		skb_queue_head_init(&priv->ieee80211->skb_aggQ[i]);
	for (i = 0; i < MAX_QUEUE_SIZE; i++)
		skb_queue_head_init(&priv->ieee80211->skb_drv_aggQ[i]);
	priv->rf_set_chan = rtl8192_phy_SwChnl;
}

//init lock here
static void rtl8192_init_priv_lock(struct r8192_priv *priv)
{
	spin_lock_init(&priv->tx_lock);
	spin_lock_init(&priv->irq_lock);//added by thomas
	sema_init(&priv->wx_sem, 1);
	sema_init(&priv->rf_sem, 1);
	mutex_init(&priv->mutex);
}

extern  void    rtl819x_watchdog_wqcallback(struct work_struct *work);

void rtl8192_irq_rx_tasklet(struct r8192_priv *priv);
//init tasklet and wait_queue here. only 2.6 above kernel is considered
#define DRV_NAME "wlan0"
static void rtl8192_init_priv_task(struct net_device *dev)
{
	struct r8192_priv *priv = ieee80211_priv(dev);

	priv->priv_wq = create_workqueue(DRV_NAME);

	INIT_WORK(&priv->reset_wq, rtl8192_restart);

	INIT_DELAYED_WORK(&priv->watch_dog_wq, rtl819x_watchdog_wqcallback);
	INIT_DELAYED_WORK(&priv->txpower_tracking_wq,  dm_txpower_trackingcallback);
	INIT_DELAYED_WORK(&priv->rfpath_check_wq,  dm_rf_pathcheck_workitemcallback);
	INIT_DELAYED_WORK(&priv->update_beacon_wq, rtl8192_update_beacon);
	INIT_DELAYED_WORK(&priv->initialgain_operate_wq, InitialGainOperateWorkItemCallBack);
	INIT_WORK(&priv->qos_activate, rtl8192_qos_activate);

	tasklet_init(&priv->irq_rx_tasklet,
		     (void(*)(unsigned long))rtl8192_irq_rx_tasklet,
		     (unsigned long)priv);
}

static void rtl8192_get_eeprom_size(struct net_device *dev)
{
	u16 curCR = 0;
	struct r8192_priv *priv = ieee80211_priv(dev);
	RT_TRACE(COMP_EPROM, "===========>%s()\n", __func__);
	read_nic_word_E(dev, EPROM_CMD, &curCR);
	RT_TRACE(COMP_EPROM, "read from Reg EPROM_CMD(%x):%x\n", EPROM_CMD, curCR);
	//whether need I consider BIT5?
	priv->epromtype = (curCR & Cmd9346CR_9356SEL) ? EPROM_93c56 : EPROM_93c46;
	RT_TRACE(COMP_EPROM, "<===========%s(), epromtype:%d\n", __func__, priv->epromtype);
}

//used to swap endian. as ntohl & htonl are not necessary to swap endian, so use this instead.
static inline u16 endian_swap(u16 *data)
{
	u16 tmp = *data;
	*data = (tmp >> 8) | (tmp << 8);
	return *data;
}
static void rtl8192_read_eeprom_info(struct net_device *dev)
{
	u16 wEPROM_ID = 0;
	u8 bMac_Tmp_Addr[6] = {0x00, 0xe0, 0x4c, 0x00, 0x00, 0x02};
	u8 bLoad_From_EEPOM = false;
	struct r8192_priv *priv = ieee80211_priv(dev);
	u16 tmpValue = 0;
	int i;
	RT_TRACE(COMP_EPROM, "===========>%s()\n", __func__);
	wEPROM_ID = eprom_read(dev, 0); //first read EEPROM ID out;
	RT_TRACE(COMP_EPROM, "EEPROM ID is 0x%x\n", wEPROM_ID);

	if (wEPROM_ID != RTL8190_EEPROM_ID) {
		RT_TRACE(COMP_ERR, "EEPROM ID is invalid(is 0x%x(should be 0x%x)\n", wEPROM_ID, RTL8190_EEPROM_ID);
	} else {
		bLoad_From_EEPOM = true;
	}

	if (bLoad_From_EEPOM) {
		tmpValue = eprom_read(dev, (EEPROM_VID>>1));
		priv->eeprom_vid = endian_swap(&tmpValue);
		priv->eeprom_pid = eprom_read(dev, (EEPROM_PID>>1));
		tmpValue = eprom_read(dev, (EEPROM_ChannelPlan>>1));
		priv->eeprom_ChannelPlan = ((tmpValue&0xff00)>>8);
		priv->btxpowerdata_readfromEEPORM = true;
		priv->eeprom_CustomerID = eprom_read(dev, (EEPROM_Customer_ID>>1)) >>8;
	} else {
		priv->eeprom_vid = 0;
		priv->eeprom_pid = 0;
		priv->card_8192_version = VERSION_819xU_B;
		priv->eeprom_ChannelPlan = 0;
		priv->eeprom_CustomerID = 0;
	}
	RT_TRACE(COMP_EPROM, "vid:0x%4x, pid:0x%4x, CustomID:0x%2x, ChanPlan:0x%x\n", priv->eeprom_vid, priv->eeprom_pid, priv->eeprom_CustomerID, priv->eeprom_ChannelPlan);
	//set channelplan from eeprom
	priv->ChannelPlan = priv->eeprom_ChannelPlan;
	if (bLoad_From_EEPOM) {
		int i;
		for (i = 0; i < 6; i += 2) {
			u16 tmp = 0;
			tmp = eprom_read(dev, (u16)((EEPROM_NODE_ADDRESS_BYTE_0 + i)>>1));
			*(u16 *)(&dev->dev_addr[i]) = tmp;
		}
	} else {
		memcpy(dev->dev_addr, bMac_Tmp_Addr, 6);
		//should I set IDR0 here?
	}
	RT_TRACE(COMP_EPROM, "MAC addr:%pM\n", dev->dev_addr);
	priv->rf_type = RTL819X_DEFAULT_RF_TYPE; //default 1T2R
	priv->rf_chip = RF_8256;

	if (priv->card_8192_version == (u8)VERSION_819xU_A) {
		//read Tx power gain offset of legacy OFDM to HT rate
		if (bLoad_From_EEPOM)
			priv->EEPROMTxPowerDiff = (eprom_read(dev, (EEPROM_TxPowerDiff>>1))&0xff00) >> 8;
		else
			priv->EEPROMTxPowerDiff = EEPROM_Default_TxPower;
		RT_TRACE(COMP_EPROM, "TxPowerDiff:%d\n", priv->EEPROMTxPowerDiff);
		//read ThermalMeter from EEPROM
		if (bLoad_From_EEPOM)
			priv->EEPROMThermalMeter = (u8)(eprom_read(dev, (EEPROM_ThermalMeter>>1))&0x00ff);
		else
			priv->EEPROMThermalMeter = EEPROM_Default_ThermalMeter;
		RT_TRACE(COMP_EPROM, "ThermalMeter:%d\n", priv->EEPROMThermalMeter);
		//vivi, for tx power track
		priv->TSSI_13dBm = priv->EEPROMThermalMeter *100;
		//read antenna tx power offset of B/C/D to A from EEPROM
		if (bLoad_From_EEPOM)
			priv->EEPROMPwDiff = (eprom_read(dev, (EEPROM_PwDiff>>1))&0x0f00)>>8;
		else
			priv->EEPROMPwDiff = EEPROM_Default_PwDiff;
		RT_TRACE(COMP_EPROM, "TxPwDiff:%d\n", priv->EEPROMPwDiff);
		// Read CrystalCap from EEPROM
		if (bLoad_From_EEPOM)
			priv->EEPROMCrystalCap = (eprom_read(dev, (EEPROM_CrystalCap>>1))&0x0f);
		else
			priv->EEPROMCrystalCap = EEPROM_Default_CrystalCap;
		RT_TRACE(COMP_EPROM, "CrystalCap = %d\n", priv->EEPROMCrystalCap);
		//get per-channel Tx power level
		if (bLoad_From_EEPOM)
			priv->EEPROM_Def_Ver = (eprom_read(dev, (EEPROM_TxPwIndex_Ver>>1))&0xff00)>>8;
		else
			priv->EEPROM_Def_Ver = 1;
		RT_TRACE(COMP_EPROM, "EEPROM_DEF_VER:%d\n", priv->EEPROM_Def_Ver);
		if (priv->EEPROM_Def_Ver == 0) { /* old eeprom definition */
			int i;
			if (bLoad_From_EEPOM)
				priv->EEPROMTxPowerLevelCCK = (eprom_read(dev, (EEPROM_TxPwIndex_CCK>>1))&0xff) >> 8;
			else
				priv->EEPROMTxPowerLevelCCK = 0x10;
			RT_TRACE(COMP_EPROM, "CCK Tx Power Levl: 0x%02x\n", priv->EEPROMTxPowerLevelCCK);
			for (i = 0; i < 3; i++) {
				if (bLoad_From_EEPOM) {
					tmpValue = eprom_read(dev, (EEPROM_TxPwIndex_OFDM_24G+i)>>1);
					if (((EEPROM_TxPwIndex_OFDM_24G+i) % 2) == 0)
						tmpValue = tmpValue & 0x00ff;
					else
						tmpValue = (tmpValue & 0xff00) >> 8;
				} else {
					tmpValue = 0x10;
				}
				priv->EEPROMTxPowerLevelOFDM24G[i] = (u8) tmpValue;
				RT_TRACE(COMP_EPROM, "OFDM 2.4G Tx Power Level, Index %d = 0x%02x\n", i, priv->EEPROMTxPowerLevelCCK);
			}
		} else if (priv->EEPROM_Def_Ver == 1) {
			if (bLoad_From_EEPOM) {
				tmpValue = eprom_read(dev, (EEPROM_TxPwIndex_CCK_V1>>1));
				tmpValue = (tmpValue & 0xff00) >> 8;
			} else {
				tmpValue = 0x10;
			}
			priv->EEPROMTxPowerLevelCCK_V1[0] = (u8)tmpValue;

			if (bLoad_From_EEPOM)
				tmpValue = eprom_read(dev, (EEPROM_TxPwIndex_CCK_V1 + 2)>>1);
			else
				tmpValue = 0x1010;
			*((u16 *)(&priv->EEPROMTxPowerLevelCCK_V1[1])) = tmpValue;
			if (bLoad_From_EEPOM)
				tmpValue = eprom_read(dev, (EEPROM_TxPwIndex_OFDM_24G_V1>>1));
			else
				tmpValue = 0x1010;
			*((u16 *)(&priv->EEPROMTxPowerLevelOFDM24G[0])) = tmpValue;
			if (bLoad_From_EEPOM)
				tmpValue = eprom_read(dev, (EEPROM_TxPwIndex_OFDM_24G_V1+2)>>1);
			else
				tmpValue = 0x10;
			priv->EEPROMTxPowerLevelOFDM24G[2] = (u8)tmpValue;
		}//endif EEPROM_Def_Ver == 1

		//update HAL variables
		//
		for (i = 0; i < 14; i++) {
			if (i <= 3)
				priv->TxPowerLevelOFDM24G[i] = priv->EEPROMTxPowerLevelOFDM24G[0];
			else if (i >= 4 && i <= 9)
				priv->TxPowerLevelOFDM24G[i] = priv->EEPROMTxPowerLevelOFDM24G[1];
			else
				priv->TxPowerLevelOFDM24G[i] = priv->EEPROMTxPowerLevelOFDM24G[2];
		}

		for (i = 0; i < 14; i++) {
			if (priv->EEPROM_Def_Ver == 0) {
				if (i <= 3)
					priv->TxPowerLevelCCK[i] = priv->EEPROMTxPowerLevelOFDM24G[0] + (priv->EEPROMTxPowerLevelCCK - priv->EEPROMTxPowerLevelOFDM24G[1]);
				else if (i >= 4 && i <= 9)
					priv->TxPowerLevelCCK[i] = priv->EEPROMTxPowerLevelCCK;
				else
					priv->TxPowerLevelCCK[i] = priv->EEPROMTxPowerLevelOFDM24G[2] + (priv->EEPROMTxPowerLevelCCK - priv->EEPROMTxPowerLevelOFDM24G[1]);
			} else if (priv->EEPROM_Def_Ver == 1) {
				if (i <= 3)
					priv->TxPowerLevelCCK[i] = priv->EEPROMTxPowerLevelCCK_V1[0];
				else if (i >= 4 && i <= 9)
					priv->TxPowerLevelCCK[i] = priv->EEPROMTxPowerLevelCCK_V1[1];
				else
					priv->TxPowerLevelCCK[i] = priv->EEPROMTxPowerLevelCCK_V1[2];
			}
		}
		priv->TxPowerDiff = priv->EEPROMPwDiff;
		// Antenna B gain offset to antenna A, bit0~3
		priv->AntennaTxPwDiff[0] = (priv->EEPROMTxPowerDiff & 0xf);
		// Antenna C gain offset to antenna A, bit4~7
		priv->AntennaTxPwDiff[1] = ((priv->EEPROMTxPowerDiff & 0xf0)>>4);
		// CrystalCap, bit12~15
		priv->CrystalCap = priv->EEPROMCrystalCap;
		// ThermalMeter, bit0~3 for RFIC1, bit4~7 for RFIC2
		// 92U does not enable TX power tracking.
		priv->ThermalMeter[0] = priv->EEPROMThermalMeter;
	}//end if VersionID == VERSION_819xU_A

	//added by vivi, for dlink led, 20080416
	switch (priv->eeprom_CustomerID) {
	case EEPROM_CID_RUNTOP:
		priv->CustomerID = RT_CID_819x_RUNTOP;
		break;

	case EEPROM_CID_DLINK:
		priv->CustomerID = RT_CID_DLINK;
		break;

	default:
		priv->CustomerID = RT_CID_DEFAULT;
		break;

	}

	switch (priv->CustomerID) {
	case RT_CID_819x_RUNTOP:
		priv->LedStrategy = SW_LED_MODE2;
		break;

	case RT_CID_DLINK:
		priv->LedStrategy = SW_LED_MODE4;
		break;

	default:
		priv->LedStrategy = SW_LED_MODE0;
		break;

	}


	if (priv->rf_type == RF_1T2R) {
		RT_TRACE(COMP_EPROM, "\n1T2R config\n");
	} else {
		RT_TRACE(COMP_EPROM, "\n2T4R config\n");
	}

	// 2008/01/16 MH We can only know RF type in the function. So we have to init
	// DIG RATR table again.
	init_rate_adaptive(dev);
	//we need init DIG RATR table here again.

	RT_TRACE(COMP_EPROM, "<===========%s()\n", __func__);
	return;
}

static short rtl8192_get_channel_map(struct net_device *dev)
{
	struct r8192_priv *priv = ieee80211_priv(dev);
	if (priv->ChannelPlan > COUNTRY_CODE_GLOBAL_DOMAIN) {
		netdev_err(dev, "rtl8180_init: Error channel plan! Set to default.\n");
		priv->ChannelPlan = 0;
	}
	RT_TRACE(COMP_INIT, "Channel plan is %d\n", priv->ChannelPlan);

	rtl819x_set_channel_map(priv->ChannelPlan, priv);
	return 0;
}

static short rtl8192_init(struct net_device *dev)
{

	struct r8192_priv *priv = ieee80211_priv(dev);

	memset(&(priv->stats), 0, sizeof(struct Stats));
	memset(priv->txqueue_to_outpipemap, 0, 9);
#ifdef PIPE12
	{
		int i = 0;
		u8 queuetopipe[] = {3, 2, 1, 0, 4, 8, 7, 6, 5};
		memcpy(priv->txqueue_to_outpipemap, queuetopipe, 9);
	}
#else
	{
		u8 queuetopipe[] = {3, 2, 1, 0, 4, 4, 0, 4, 4};
		memcpy(priv->txqueue_to_outpipemap, queuetopipe, 9);
	}
#endif
	rtl8192_init_priv_variable(dev);
	rtl8192_init_priv_lock(priv);
	rtl8192_init_priv_task(dev);
	rtl8192_get_eeprom_size(dev);
	rtl8192_read_eeprom_info(dev);
	rtl8192_get_channel_map(dev);
	init_hal_dm(dev);
	init_timer(&priv->watch_dog_timer);
	priv->watch_dog_timer.data = (unsigned long)dev;
	priv->watch_dog_timer.function = watch_dog_timer_callback;
	if (rtl8192_usb_initendpoints(dev) != 0) {
		DMESG("Endopoints initialization failed");
		return -ENOMEM;
	}

	return 0;
}

/******************************************************************************
 *function:  This function actually only set RRSR, RATR and BW_OPMODE registers
 *	     not to do all the hw config as its name says
 *   input:  net_device dev
 *  output:  none
 *  return:  none
 *  notice:  This part need to modified according to the rate set we filtered
 * ****************************************************************************/
static void rtl8192_hwconfig(struct net_device *dev)
{
	u32 regRATR = 0, regRRSR = 0;
	u8 regBwOpMode = 0, regTmp = 0;
	struct r8192_priv *priv = ieee80211_priv(dev);
	u32 ratr_value = 0;

	// Set RRSR, RATR, and BW_OPMODE registers
	//
	switch (priv->ieee80211->mode) {
	case WIRELESS_MODE_B:
		regBwOpMode = BW_OPMODE_20MHZ;
		regRATR = RATE_ALL_CCK;
		regRRSR = RATE_ALL_CCK;
		break;
	case WIRELESS_MODE_A:
		regBwOpMode = BW_OPMODE_5G |BW_OPMODE_20MHZ;
		regRATR = RATE_ALL_OFDM_AG;
		regRRSR = RATE_ALL_OFDM_AG;
		break;
	case WIRELESS_MODE_G:
		regBwOpMode = BW_OPMODE_20MHZ;
		regRATR = RATE_ALL_CCK | RATE_ALL_OFDM_AG;
		regRRSR = RATE_ALL_CCK | RATE_ALL_OFDM_AG;
		break;
	case WIRELESS_MODE_AUTO:
#ifdef TO_DO_LIST
		if (Adapter->bInHctTest) {
			regBwOpMode = BW_OPMODE_20MHZ;
			regRATR = RATE_ALL_CCK | RATE_ALL_OFDM_AG;
			regRRSR = RATE_ALL_CCK | RATE_ALL_OFDM_AG;
		}
		else
#endif
		{
			regBwOpMode = BW_OPMODE_20MHZ;
			regRATR = RATE_ALL_CCK | RATE_ALL_OFDM_AG | RATE_ALL_OFDM_1SS | RATE_ALL_OFDM_2SS;
			regRRSR = RATE_ALL_CCK | RATE_ALL_OFDM_AG;
		}
		break;
	case WIRELESS_MODE_N_24G:
		// It support CCK rate by default.
		// CCK rate will be filtered out only when associated AP does not support it.
		regBwOpMode = BW_OPMODE_20MHZ;
		regRATR = RATE_ALL_CCK | RATE_ALL_OFDM_AG | RATE_ALL_OFDM_1SS | RATE_ALL_OFDM_2SS;
		regRRSR = RATE_ALL_CCK | RATE_ALL_OFDM_AG;
		break;
	case WIRELESS_MODE_N_5G:
		regBwOpMode = BW_OPMODE_5G;
		regRATR = RATE_ALL_OFDM_AG | RATE_ALL_OFDM_1SS | RATE_ALL_OFDM_2SS;
		regRRSR = RATE_ALL_OFDM_AG;
		break;
	}

	write_nic_byte(dev, BW_OPMODE, regBwOpMode);
	ratr_value = regRATR;
	if (priv->rf_type == RF_1T2R)
		ratr_value &= ~(RATE_ALL_OFDM_2SS);
	write_nic_dword(dev, RATR0, ratr_value);
	write_nic_byte(dev, UFWP, 1);
	read_nic_byte(dev, 0x313, &regTmp);
	regRRSR = ((regTmp) << 24) | (regRRSR & 0x00ffffff);
	write_nic_dword(dev, RRSR, regRRSR);

	//
	// Set Retry Limit here
	//
	write_nic_word(dev, RETRY_LIMIT,
		       priv->ShortRetryLimit << RETRY_LIMIT_SHORT_SHIFT |
		       priv->LongRetryLimit << RETRY_LIMIT_LONG_SHIFT);
	// Set Contention Window here

	// Set Tx AGC

	// Set Tx Antenna including Feedback control

	// Set Auto Rate fallback control


}


//InitializeAdapter and PhyCfg
static bool rtl8192_adapter_start(struct net_device *dev)
{
	struct r8192_priv *priv = ieee80211_priv(dev);
	u32 dwRegRead = 0;
	bool init_status = true;
	u8 SECR_value = 0x0;
	u8 tmp;
	RT_TRACE(COMP_INIT, "====>%s()\n", __func__);
	priv->Rf_Mode = RF_OP_By_SW_3wire;
	//for ASIC power on sequence
	write_nic_byte_E(dev, 0x5f, 0x80);
	mdelay(50);
	write_nic_byte_E(dev, 0x5f, 0xf0);
	write_nic_byte_E(dev, 0x5d, 0x00);
	write_nic_byte_E(dev, 0x5e, 0x80);
	write_nic_byte(dev, 0x17, 0x37);
	mdelay(10);
	priv->pFirmware->firmware_status = FW_STATUS_0_INIT;
	//config CPUReset Register
	//Firmware Reset or not?
	read_nic_dword(dev, CPU_GEN, &dwRegRead);
	if (priv->pFirmware->firmware_status == FW_STATUS_0_INIT)
		dwRegRead |= CPU_GEN_SYSTEM_RESET; //do nothing here?
	else if (priv->pFirmware->firmware_status == FW_STATUS_5_READY)
		dwRegRead |= CPU_GEN_FIRMWARE_RESET;
	else
		RT_TRACE(COMP_ERR, "ERROR in %s(): undefined firmware state(%d)\n", __func__,   priv->pFirmware->firmware_status);

	write_nic_dword(dev, CPU_GEN, dwRegRead);
	//config BB.
	rtl8192_BBConfig(dev);

	//Loopback mode or not
	priv->LoopbackMode = RTL819xU_NO_LOOPBACK;

	read_nic_dword(dev, CPU_GEN, &dwRegRead);
	if (priv->LoopbackMode == RTL819xU_NO_LOOPBACK)
		dwRegRead = ((dwRegRead & CPU_GEN_NO_LOOPBACK_MSK) | CPU_GEN_NO_LOOPBACK_SET);
	else if (priv->LoopbackMode == RTL819xU_MAC_LOOPBACK)
		dwRegRead |= CPU_CCK_LOOPBACK;
	else
		RT_TRACE(COMP_ERR, "Serious error in %s(): wrong loopback mode setting(%d)\n", __func__,  priv->LoopbackMode);

	write_nic_dword(dev, CPU_GEN, dwRegRead);

	//after reset cpu, we need wait for a seconds to write in register.
	udelay(500);

	//xiong add for new bitfile:usb suspend reset pin set to 1. //do we need?
	read_nic_byte_E(dev, 0x5f, &tmp);
	write_nic_byte_E(dev, 0x5f, tmp|0x20);

	//Set Hardware
	rtl8192_hwconfig(dev);

	//turn on Tx/Rx
	write_nic_byte(dev, CMDR, CR_RE|CR_TE);

	//set IDR0 here
	write_nic_dword(dev, MAC0, ((u32 *)dev->dev_addr)[0]);
	write_nic_word(dev, MAC4, ((u16 *)(dev->dev_addr + 4))[0]);

	//set RCR
	write_nic_dword(dev, RCR, priv->ReceiveConfig);

	//Initialize Number of Reserved Pages in Firmware Queue
	write_nic_dword(dev, RQPN1,  NUM_OF_PAGE_IN_FW_QUEUE_BK << RSVD_FW_QUEUE_PAGE_BK_SHIFT |
			NUM_OF_PAGE_IN_FW_QUEUE_BE << RSVD_FW_QUEUE_PAGE_BE_SHIFT |
			NUM_OF_PAGE_IN_FW_QUEUE_VI << RSVD_FW_QUEUE_PAGE_VI_SHIFT |
			NUM_OF_PAGE_IN_FW_QUEUE_VO <<RSVD_FW_QUEUE_PAGE_VO_SHIFT);
	write_nic_dword(dev, RQPN2, NUM_OF_PAGE_IN_FW_QUEUE_MGNT << RSVD_FW_QUEUE_PAGE_MGNT_SHIFT |
			NUM_OF_PAGE_IN_FW_QUEUE_CMD << RSVD_FW_QUEUE_PAGE_CMD_SHIFT);
	write_nic_dword(dev, RQPN3, APPLIED_RESERVED_QUEUE_IN_FW|
			NUM_OF_PAGE_IN_FW_QUEUE_BCN<<RSVD_FW_QUEUE_PAGE_BCN_SHIFT);
	write_nic_dword(dev, RATR0+4*7, (RATE_ALL_OFDM_AG | RATE_ALL_CCK));

	//Set AckTimeout
	// TODO: (it value is only for FPGA version). need to be changed!!2006.12.18, by Emily
	write_nic_byte(dev, ACK_TIMEOUT, 0x30);

	if (priv->ResetProgress == RESET_TYPE_NORESET)
		rtl8192_SetWirelessMode(dev, priv->ieee80211->mode);
	if (priv->ResetProgress == RESET_TYPE_NORESET) {
		CamResetAllEntry(dev);
		SECR_value |= SCR_TxEncEnable;
		SECR_value |= SCR_RxDecEnable;
		SECR_value |= SCR_NoSKMC;
		write_nic_byte(dev, SECR, SECR_value);
	}

	//Beacon related
	write_nic_word(dev, ATIMWND, 2);
	write_nic_word(dev, BCN_INTERVAL, 100);

#define DEFAULT_EDCA 0x005e4332
	{
		int i;
		for (i = 0; i < QOS_QUEUE_NUM; i++)
			write_nic_dword(dev, WDCAPARA_ADD[i], DEFAULT_EDCA);
	}

	rtl8192_phy_configmac(dev);

	if (priv->card_8192_version == (u8) VERSION_819xU_A) {
		rtl8192_phy_getTxPower(dev);
		rtl8192_phy_setTxPower(dev, priv->chan);
	}

	//Firmware download
	init_status = init_firmware(dev);
	if (!init_status) {
		RT_TRACE(COMP_ERR, "ERR!!! %s(): Firmware download is failed\n", __func__);
		return init_status;
	}
	RT_TRACE(COMP_INIT, "%s():after firmware download\n", __func__);
	//
#ifdef TO_DO_LIST
	if (Adapter->ResetProgress == RESET_TYPE_NORESET) {
		if (pMgntInfo->RegRfOff == TRUE) { /* User disable RF via registry. */
			RT_TRACE((COMP_INIT|COMP_RF), DBG_LOUD, ("InitializeAdapter819xUsb(): Turn off RF for RegRfOff ----------\n"));
			MgntActSet_RF_State(Adapter, eRfOff, RF_CHANGE_BY_SW);
			// Those actions will be discard in MgntActSet_RF_State because of the same state
			for (eRFPath = 0; eRFPath < pHalData->NumTotalRFPath; eRFPath++)
				PHY_SetRFReg(Adapter, (RF90_RADIO_PATH_E)eRFPath, 0x4, 0xC00, 0x0);
		} else if (pMgntInfo->RfOffReason > RF_CHANGE_BY_PS) { /* H/W or S/W RF OFF before sleep. */
			RT_TRACE((COMP_INIT|COMP_RF), DBG_LOUD, ("InitializeAdapter819xUsb(): Turn off RF for RfOffReason(%d) ----------\n", pMgntInfo->RfOffReason));
			MgntActSet_RF_State(Adapter, eRfOff, pMgntInfo->RfOffReason);
		} else {
			pHalData->eRFPowerState = eRfOn;
			pMgntInfo->RfOffReason = 0;
			RT_TRACE((COMP_INIT|COMP_RF), DBG_LOUD, ("InitializeAdapter819xUsb(): RF is on ----------\n"));
		}
	} else {
		if (pHalData->eRFPowerState == eRfOff) {
			MgntActSet_RF_State(Adapter, eRfOff, pMgntInfo->RfOffReason);
			// Those actions will be discard in MgntActSet_RF_State because of the same state
			for (eRFPath = 0; eRFPath < pHalData->NumTotalRFPath; eRFPath++)
				PHY_SetRFReg(Adapter, (RF90_RADIO_PATH_E)eRFPath, 0x4, 0xC00, 0x0);
		}
	}
#endif
	//config RF.
	if (priv->ResetProgress == RESET_TYPE_NORESET) {
		rtl8192_phy_RFConfig(dev);
		RT_TRACE(COMP_INIT, "%s():after phy RF config\n", __func__);
	}


	if (priv->ieee80211->FwRWRF)
		// We can force firmware to do RF-R/W
		priv->Rf_Mode = RF_OP_By_FW;
	else
		priv->Rf_Mode = RF_OP_By_SW_3wire;


	rtl8192_phy_updateInitGain(dev);
	/*--set CCK and OFDM Block "ON"--*/
	rtl8192_setBBreg(dev, rFPGA0_RFMOD, bCCKEn, 0x1);
	rtl8192_setBBreg(dev, rFPGA0_RFMOD, bOFDMEn, 0x1);

	if (priv->ResetProgress == RESET_TYPE_NORESET) {
		//if D or C cut
		u8 tmpvalue;
		read_nic_byte(dev, 0x301, &tmpvalue);
		if (tmpvalue == 0x03) {
			priv->bDcut = TRUE;
			RT_TRACE(COMP_POWER_TRACKING, "D-cut\n");
		} else {
			priv->bDcut = FALSE;
			RT_TRACE(COMP_POWER_TRACKING, "C-cut\n");
		}
		dm_initialize_txpower_tracking(dev);

		if (priv->bDcut == TRUE) {
			u32 i, TempCCk;
			u32 tmpRegA = rtl8192_QueryBBReg(dev, rOFDM0_XATxIQImbalance, bMaskDWord);
			for (i = 0; i < TxBBGainTableLength; i++) {
				if (tmpRegA == priv->txbbgain_table[i].txbbgain_value) {
					priv->rfa_txpowertrackingindex = (u8)i;
					priv->rfa_txpowertrackingindex_real = (u8)i;
					priv->rfa_txpowertracking_default = priv->rfa_txpowertrackingindex;
					break;
				}
			}

			TempCCk = rtl8192_QueryBBReg(dev, rCCK0_TxFilter1, bMaskByte2);

			for (i = 0; i < CCKTxBBGainTableLength; i++) {

				if (TempCCk == priv->cck_txbbgain_table[i].ccktxbb_valuearray[0]) {
					priv->cck_present_attentuation_20Mdefault = (u8) i;
					break;
				}
			}
			priv->cck_present_attentuation_40Mdefault = 0;
			priv->cck_present_attentuation_difference = 0;
			priv->cck_present_attentuation = priv->cck_present_attentuation_20Mdefault;

		}
	}
	write_nic_byte(dev, 0x87, 0x0);


	return init_status;
}

/* this configures registers for beacon tx and enables it via
 * rtl8192_beacon_tx_enable(). rtl8192_beacon_tx_disable() might
 * be used to stop beacon transmission
 */
/***************************************************************************
    -------------------------------NET STUFF---------------------------
***************************************************************************/

static struct net_device_stats *rtl8192_stats(struct net_device *dev)
{
	struct r8192_priv *priv = ieee80211_priv(dev);

	return &priv->ieee80211->stats;
}

static bool HalTxCheckStuck819xUsb(struct net_device *dev)
{
	struct r8192_priv *priv = ieee80211_priv(dev);
	u16		RegTxCounter;
	bool		bStuck = FALSE;
	read_nic_word(dev, 0x128, &RegTxCounter);
	RT_TRACE(COMP_RESET, "%s():RegTxCounter is %d,TxCounter is %d\n", __func__, RegTxCounter, priv->TxCounter);
	if (priv->TxCounter == RegTxCounter)
		bStuck = TRUE;

	priv->TxCounter = RegTxCounter;

	return bStuck;
}

/*
*	<Assumption: RT_TX_SPINLOCK is acquired.>
*	First added: 2006.11.19 by emily
*/
static RESET_TYPE TxCheckStuck(struct net_device *dev)
{
	struct r8192_priv *priv = ieee80211_priv(dev);
	u8			QueueID;
	bool			bCheckFwTxCnt = false;

	//
	// Decide such threshold according to current power save mode
	//

	for (QueueID = 0; QueueID <= BEACON_QUEUE; QueueID++) {
		if (QueueID == TXCMD_QUEUE)
			continue;
		if ((skb_queue_len(&priv->ieee80211->skb_waitQ[QueueID]) == 0)  && (skb_queue_len(&priv->ieee80211->skb_aggQ[QueueID]) == 0))
			continue;

		bCheckFwTxCnt = true;
	}
	if (bCheckFwTxCnt) {
		if (HalTxCheckStuck819xUsb(dev)) {
			RT_TRACE(COMP_RESET, "TxCheckStuck(): Fw indicates no Tx condition! \n");
			return RESET_TYPE_SILENT;
		}
	}
	return RESET_TYPE_NORESET;
}

static bool HalRxCheckStuck819xUsb(struct net_device *dev)
{
	u16	RegRxCounter;
	struct r8192_priv *priv = ieee80211_priv(dev);
	bool bStuck = FALSE;
	static u8	rx_chk_cnt;
	read_nic_word(dev, 0x130, &RegRxCounter);
	RT_TRACE(COMP_RESET, "%s(): RegRxCounter is %d,RxCounter is %d\n", __func__, RegRxCounter, priv->RxCounter);
	// If rssi is small, we should check rx for long time because of bad rx.
	// or maybe it will continuous silent reset every 2 seconds.
	rx_chk_cnt++;
	if (priv->undecorated_smoothed_pwdb >= (RateAdaptiveTH_High+5)) {
		rx_chk_cnt = 0;	//high rssi, check rx stuck right now.
	} else if (priv->undecorated_smoothed_pwdb < (RateAdaptiveTH_High+5) &&
		   ((priv->CurrentChannelBW != HT_CHANNEL_WIDTH_20 && priv->undecorated_smoothed_pwdb >= RateAdaptiveTH_Low_40M) ||
		    (priv->CurrentChannelBW == HT_CHANNEL_WIDTH_20 && priv->undecorated_smoothed_pwdb >= RateAdaptiveTH_Low_20M))) {
		if (rx_chk_cnt < 2)
			return bStuck;
		else
			rx_chk_cnt = 0;
	} else if (((priv->CurrentChannelBW != HT_CHANNEL_WIDTH_20 && priv->undecorated_smoothed_pwdb < RateAdaptiveTH_Low_40M) ||
		    (priv->CurrentChannelBW == HT_CHANNEL_WIDTH_20 && priv->undecorated_smoothed_pwdb < RateAdaptiveTH_Low_20M)) &&
		     priv->undecorated_smoothed_pwdb >= VeryLowRSSI) {
		if (rx_chk_cnt < 4)
			return bStuck;
		else
			rx_chk_cnt = 0;
	} else {
		if (rx_chk_cnt < 8)
			return bStuck;
		else
			rx_chk_cnt = 0;
	}

	if (priv->RxCounter == RegRxCounter)
		bStuck = TRUE;

	priv->RxCounter = RegRxCounter;

	return bStuck;
}

static RESET_TYPE RxCheckStuck(struct net_device *dev)
{
	struct r8192_priv *priv = ieee80211_priv(dev);
	bool        bRxCheck = FALSE;

	if (priv->IrpPendingCount > 1)
		bRxCheck = TRUE;

	if (bRxCheck) {
		if (HalRxCheckStuck819xUsb(dev)) {
			RT_TRACE(COMP_RESET, "RxStuck Condition\n");
			return RESET_TYPE_SILENT;
		}
	}
	return RESET_TYPE_NORESET;
}


/**
*	This function is called by Checkforhang to check whether we should ask OS to reset driver
*
*	\param pAdapter	The adapter context for this miniport
*
*	Note:NIC with USB interface sholud not call this function because we cannot scan descriptor
*	to judge whether there is tx stuck.
*	Note: This function may be required to be rewrite for Vista OS.
*	<<<Assumption: Tx spinlock has been acquired >>>
*
*	8185 and 8185b does not implement this function. This is added by Emily at 2006.11.24
*/
static RESET_TYPE rtl819x_ifcheck_resetornot(struct net_device *dev)
{
	struct r8192_priv *priv = ieee80211_priv(dev);
	RESET_TYPE	TxResetType = RESET_TYPE_NORESET;
	RESET_TYPE	RxResetType = RESET_TYPE_NORESET;
	RT_RF_POWER_STATE	rfState;

	rfState = priv->ieee80211->eRFPowerState;

	TxResetType = TxCheckStuck(dev);
	if (rfState != eRfOff ||
	    (priv->ieee80211->iw_mode != IW_MODE_ADHOC)) {
		// If driver is in the status of firmware download failure , driver skips RF initialization and RF is
		// in turned off state. Driver should check whether Rx stuck and do silent reset. And
		// if driver is in firmware download failure status, driver should initialize RF in the following
		// silent reset procedure Emily, 2008.01.21

		// Driver should not check RX stuck in IBSS mode because it is required to
		// set Check BSSID in order to send beacon, however, if check BSSID is
		// set, STA cannot hear any packet at all. Emily, 2008.04.12
		RxResetType = RxCheckStuck(dev);
	}
	if (TxResetType == RESET_TYPE_NORMAL || RxResetType == RESET_TYPE_NORMAL) {
		return RESET_TYPE_NORMAL;
	} else if (TxResetType == RESET_TYPE_SILENT || RxResetType == RESET_TYPE_SILENT) {
		RT_TRACE(COMP_RESET, "%s():silent reset\n", __func__);
		return RESET_TYPE_SILENT;
	} else {
		return RESET_TYPE_NORESET;
	}

}

void rtl8192_cancel_deferred_work(struct r8192_priv *priv);
int _rtl8192_up(struct net_device *dev);
int rtl8192_close(struct net_device *dev);


static void CamRestoreAllEntry(struct net_device *dev)
{
	u8 EntryId = 0;
	struct r8192_priv *priv = ieee80211_priv(dev);
	u8	*MacAddr = priv->ieee80211->current_network.bssid;

	static u8	CAM_CONST_ADDR[4][6] = {
		{0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
		{0x00, 0x00, 0x00, 0x00, 0x00, 0x01},
		{0x00, 0x00, 0x00, 0x00, 0x00, 0x02},
		{0x00, 0x00, 0x00, 0x00, 0x00, 0x03} };
	static u8	CAM_CONST_BROAD[] = {
		0xff, 0xff, 0xff, 0xff, 0xff, 0xff};

	RT_TRACE(COMP_SEC, "CamRestoreAllEntry: \n");


	if ((priv->ieee80211->pairwise_key_type == KEY_TYPE_WEP40) ||
	    (priv->ieee80211->pairwise_key_type == KEY_TYPE_WEP104)) {

		for (EntryId = 0; EntryId < 4; EntryId++) {
			MacAddr = CAM_CONST_ADDR[EntryId];
			setKey(dev, EntryId, EntryId,
			       priv->ieee80211->pairwise_key_type,
			       MacAddr, 0, NULL);
		}

	} else if (priv->ieee80211->pairwise_key_type == KEY_TYPE_TKIP) {

		if (priv->ieee80211->iw_mode == IW_MODE_ADHOC)
			setKey(dev, 4, 0, priv->ieee80211->pairwise_key_type,
			       (u8 *)dev->dev_addr, 0, NULL);
		else
			setKey(dev, 4, 0, priv->ieee80211->pairwise_key_type,
			       MacAddr, 0, NULL);
	} else if (priv->ieee80211->pairwise_key_type == KEY_TYPE_CCMP) {

		if (priv->ieee80211->iw_mode == IW_MODE_ADHOC)
			setKey(dev, 4, 0, priv->ieee80211->pairwise_key_type,
			       (u8 *)dev->dev_addr, 0, NULL);
		else
			setKey(dev, 4, 0, priv->ieee80211->pairwise_key_type,
			       MacAddr, 0, NULL);
	}


	if (priv->ieee80211->group_key_type == KEY_TYPE_TKIP) {
		MacAddr = CAM_CONST_BROAD;
		for (EntryId = 1; EntryId < 4; EntryId++) {
			setKey(dev, EntryId, EntryId,
			       priv->ieee80211->group_key_type,
			       MacAddr, 0, NULL);
		}
		if (priv->ieee80211->iw_mode == IW_MODE_ADHOC)
			setKey(dev, 0, 0, priv->ieee80211->group_key_type,
			       CAM_CONST_ADDR[0], 0, NULL);
	} else if (priv->ieee80211->group_key_type == KEY_TYPE_CCMP) {
		MacAddr = CAM_CONST_BROAD;
		for (EntryId = 1; EntryId < 4; EntryId++) {
			setKey(dev, EntryId, EntryId,
			       priv->ieee80211->group_key_type,
			       MacAddr, 0, NULL);
		}

		if (priv->ieee80211->iw_mode == IW_MODE_ADHOC)
			setKey(dev, 0, 0, priv->ieee80211->group_key_type,
			       CAM_CONST_ADDR[0], 0, NULL);
	}
}
//////////////////////////////////////////////////////////////
// This function is used to fix Tx/Rx stop bug temporarily.
// This function will do "system reset" to NIC when Tx or Rx is stuck.
// The method checking Tx/Rx stuck of this function is supported by FW,
// which reports Tx and Rx counter to register 0x128 and 0x130.
//////////////////////////////////////////////////////////////
static void rtl819x_ifsilentreset(struct net_device *dev)
{
	struct r8192_priv *priv = ieee80211_priv(dev);
	u8	reset_times = 0;
	int reset_status = 0;
	struct ieee80211_device *ieee = priv->ieee80211;


	// 2007.07.20. If we need to check CCK stop, please uncomment this line.
	//bStuck = Adapter->HalFunc.CheckHWStopHandler(Adapter);

	if (priv->ResetProgress == RESET_TYPE_NORESET) {
RESET_START:

		RT_TRACE(COMP_RESET, "=========>Reset progress!! \n");

		// Set the variable for reset.
		priv->ResetProgress = RESET_TYPE_SILENT;
		down(&priv->wx_sem);
		if (priv->up == 0) {
			RT_TRACE(COMP_ERR, "%s():the driver is not up! return\n", __func__);
			up(&priv->wx_sem);
			return;
		}
		priv->up = 0;
		RT_TRACE(COMP_RESET, "%s():======>start to down the driver\n", __func__);

		rtl8192_rtx_disable(dev);
		rtl8192_cancel_deferred_work(priv);
		deinit_hal_dm(dev);
		del_timer_sync(&priv->watch_dog_timer);

		ieee->sync_scan_hurryup = 1;
		if (ieee->state == IEEE80211_LINKED) {
			down(&ieee->wx_sem);
			netdev_dbg(dev, "ieee->state is IEEE80211_LINKED\n");
			ieee80211_stop_send_beacons(priv->ieee80211);
			del_timer_sync(&ieee->associate_timer);
			cancel_delayed_work(&ieee->associate_retry_wq);
			ieee80211_stop_scan(ieee);
			netif_carrier_off(dev);
			up(&ieee->wx_sem);
		} else {
			netdev_dbg(dev, "ieee->state is NOT LINKED\n");
			ieee80211_softmac_stop_protocol(priv->ieee80211);
		}
		up(&priv->wx_sem);
		RT_TRACE(COMP_RESET, "%s():<==========down process is finished\n", __func__);
		RT_TRACE(COMP_RESET, "%s():===========>start up the driver\n", __func__);
		reset_status = _rtl8192_up(dev);

		RT_TRACE(COMP_RESET, "%s():<===========up process is finished\n", __func__);
		if (reset_status == -EAGAIN) {
			if (reset_times < 3) {
				reset_times++;
				goto RESET_START;
			} else {
				RT_TRACE(COMP_ERR, " ERR!!! %s():  Reset Failed!!\n", __func__);
			}
		}
		ieee->is_silent_reset = 1;
		EnableHWSecurityConfig8192(dev);
		if (ieee->state == IEEE80211_LINKED && ieee->iw_mode == IW_MODE_INFRA) {
			ieee->set_chan(ieee->dev, ieee->current_network.channel);

			queue_work(ieee->wq, &ieee->associate_complete_wq);

		} else if (ieee->state == IEEE80211_LINKED && ieee->iw_mode == IW_MODE_ADHOC) {
			ieee->set_chan(ieee->dev, ieee->current_network.channel);
			ieee->link_change(ieee->dev);

			ieee80211_start_send_beacons(ieee);

			if (ieee->data_hard_resume)
				ieee->data_hard_resume(ieee->dev);
			netif_carrier_on(ieee->dev);
		}

		CamRestoreAllEntry(dev);

		priv->ResetProgress = RESET_TYPE_NORESET;
		priv->reset_count++;

		priv->bForcedSilentReset = false;
		priv->bResetInProgress = false;

		// For test --> force write UFWP.
		write_nic_byte(dev, UFWP, 1);
		RT_TRACE(COMP_RESET, "Reset finished!! ====>[%d]\n", priv->reset_count);
	}
}

static void rtl819x_update_rxcounts(struct r8192_priv *priv, u32 *TotalRxBcnNum,
			     u32 *TotalRxDataNum)
{
	u16			SlotIndex;
	u8			i;

	*TotalRxBcnNum = 0;
	*TotalRxDataNum = 0;

	SlotIndex = (priv->ieee80211->LinkDetectInfo.SlotIndex++)%(priv->ieee80211->LinkDetectInfo.SlotNum);
	priv->ieee80211->LinkDetectInfo.RxBcnNum[SlotIndex] = priv->ieee80211->LinkDetectInfo.NumRecvBcnInPeriod;
	priv->ieee80211->LinkDetectInfo.RxDataNum[SlotIndex] = priv->ieee80211->LinkDetectInfo.NumRecvDataInPeriod;
	for (i = 0; i < priv->ieee80211->LinkDetectInfo.SlotNum; i++) {
		*TotalRxBcnNum += priv->ieee80211->LinkDetectInfo.RxBcnNum[i];
		*TotalRxDataNum += priv->ieee80211->LinkDetectInfo.RxDataNum[i];
	}
}


void rtl819x_watchdog_wqcallback(struct work_struct *work)
{
	struct delayed_work *dwork = container_of(work, struct delayed_work, work);
	struct r8192_priv *priv = container_of(dwork, struct r8192_priv, watch_dog_wq);
	struct net_device *dev = priv->ieee80211->dev;
	struct ieee80211_device *ieee = priv->ieee80211;
	RESET_TYPE	ResetType = RESET_TYPE_NORESET;
	static u8	check_reset_cnt;
	bool bBusyTraffic = false;
	u32	TotalRxBcnNum = 0;
	u32	TotalRxDataNum = 0;

	if (!priv->up)
		return;
	hal_dm_watchdog(dev);

	//to get busy traffic condition
	if (ieee->state == IEEE80211_LINKED) {
		if (ieee->LinkDetectInfo.NumRxOkInPeriod > 666 ||
		    ieee->LinkDetectInfo.NumTxOkInPeriod > 666 ) {
			bBusyTraffic = true;
		}
		ieee->LinkDetectInfo.NumRxOkInPeriod = 0;
		ieee->LinkDetectInfo.NumTxOkInPeriod = 0;
		ieee->LinkDetectInfo.bBusyTraffic = bBusyTraffic;
	}
	//added by amy for AP roaming
	if (priv->ieee80211->state == IEEE80211_LINKED && priv->ieee80211->iw_mode == IW_MODE_INFRA) {

		rtl819x_update_rxcounts(priv, &TotalRxBcnNum, &TotalRxDataNum);
		if ((TotalRxBcnNum+TotalRxDataNum) == 0) {
#ifdef TODO
			if (rfState == eRfOff)
				RT_TRACE(COMP_ERR, "========>%s()\n", __func__);
#endif
			netdev_dbg(dev, "===>%s(): AP is power off, connect another one\n", __func__);
			priv->ieee80211->state = IEEE80211_ASSOCIATING;
			notify_wx_assoc_event(priv->ieee80211);
			RemovePeerTS(priv->ieee80211, priv->ieee80211->current_network.bssid);
			priv->ieee80211->link_change(dev);
			queue_work(priv->ieee80211->wq, &priv->ieee80211->associate_procedure_wq);

		}
	}
	priv->ieee80211->LinkDetectInfo.NumRecvBcnInPeriod = 0;
	priv->ieee80211->LinkDetectInfo.NumRecvDataInPeriod = 0;
	//check if reset the driver
	if (check_reset_cnt++ >= 3) {
		ResetType = rtl819x_ifcheck_resetornot(dev);
		check_reset_cnt = 3;
	}
	if ((priv->force_reset) || (priv->ResetProgress == RESET_TYPE_NORESET &&
	    (priv->bForcedSilentReset ||
	    (!priv->bDisableNormalResetCheck && ResetType == RESET_TYPE_SILENT)))) { /* This is control by OID set in Pomelo */
		RT_TRACE(COMP_RESET, "%s():priv->force_reset is %d,priv->ResetProgress is %d, priv->bForcedSilentReset is %d,priv->bDisableNormalResetCheck is %d,ResetType is %d\n", __func__, priv->force_reset, priv->ResetProgress, priv->bForcedSilentReset, priv->bDisableNormalResetCheck, ResetType);
		rtl819x_ifsilentreset(dev);
	}
	priv->force_reset = false;
	priv->bForcedSilentReset = false;
	priv->bResetInProgress = false;
	RT_TRACE(COMP_TRACE, " <==RtUsbCheckForHangWorkItemCallback()\n");

}

void watch_dog_timer_callback(unsigned long data)
{
	struct r8192_priv *priv = ieee80211_priv((struct net_device *) data);
	queue_delayed_work(priv->priv_wq, &priv->watch_dog_wq, 0);
	mod_timer(&priv->watch_dog_timer, jiffies + MSECS(IEEE80211_WATCH_DOG_TIME));
}
int _rtl8192_up(struct net_device *dev)
{
	struct r8192_priv *priv = ieee80211_priv(dev);
	int init_status = 0;
	priv->up = 1;
	priv->ieee80211->ieee_up = 1;
	RT_TRACE(COMP_INIT, "Bringing up iface");
	init_status = rtl8192_adapter_start(dev);
	if (!init_status) {
		RT_TRACE(COMP_ERR, "ERR!!! %s(): initialization failed!\n", __func__);
		priv->up = priv->ieee80211->ieee_up = 0;
		return -EAGAIN;
	}
	RT_TRACE(COMP_INIT, "start adapter finished\n");
	rtl8192_rx_enable(dev);
	if (priv->ieee80211->state != IEEE80211_LINKED)
		ieee80211_softmac_start_protocol(priv->ieee80211);
	ieee80211_reset_queue(priv->ieee80211);
	watch_dog_timer_callback((unsigned long) dev);
	if (!netif_queue_stopped(dev))
		netif_start_queue(dev);
	else
		netif_wake_queue(dev);

	return 0;
}


static int rtl8192_open(struct net_device *dev)
{
	struct r8192_priv *priv = ieee80211_priv(dev);
	int ret;
	down(&priv->wx_sem);
	ret = rtl8192_up(dev);
	up(&priv->wx_sem);
	return ret;

}


int rtl8192_up(struct net_device *dev)
{
	struct r8192_priv *priv = ieee80211_priv(dev);

	if (priv->up == 1)
		return -1;

	return _rtl8192_up(dev);
}


int rtl8192_close(struct net_device *dev)
{
	struct r8192_priv *priv = ieee80211_priv(dev);
	int ret;

	down(&priv->wx_sem);

	ret = rtl8192_down(dev);

	up(&priv->wx_sem);

	return ret;

}

int rtl8192_down(struct net_device *dev)
{
	struct r8192_priv *priv = ieee80211_priv(dev);
	int i;

	if (priv->up == 0)
		return -1;

	priv->up = 0;
	priv->ieee80211->ieee_up = 0;
	RT_TRACE(COMP_DOWN, "==========>%s()\n", __func__);
	/* FIXME */
	if (!netif_queue_stopped(dev))
		netif_stop_queue(dev);

	rtl8192_rtx_disable(dev);

	/* Tx related queue release */
	for (i = 0; i < MAX_QUEUE_SIZE; i++)
		skb_queue_purge(&priv->ieee80211->skb_waitQ[i]);
	for (i = 0; i < MAX_QUEUE_SIZE; i++)
		skb_queue_purge(&priv->ieee80211->skb_aggQ[i]);

	for (i = 0; i < MAX_QUEUE_SIZE; i++)
		skb_queue_purge(&priv->ieee80211->skb_drv_aggQ[i]);

	//as cancel_delayed_work will del work->timer, so if work is not defined as struct delayed_work, it will corrupt
	rtl8192_cancel_deferred_work(priv);
	deinit_hal_dm(dev);
	del_timer_sync(&priv->watch_dog_timer);


	ieee80211_softmac_stop_protocol(priv->ieee80211);
	memset(&priv->ieee80211->current_network, 0, offsetof(struct ieee80211_network, list));
	RT_TRACE(COMP_DOWN, "<==========%s()\n", __func__);

	return 0;
}


void rtl8192_commit(struct net_device *dev)
{
	struct r8192_priv *priv = ieee80211_priv(dev);
	int reset_status = 0;
	if (priv->up == 0)
		return;
	priv->up = 0;

	rtl8192_cancel_deferred_work(priv);
	del_timer_sync(&priv->watch_dog_timer);

	ieee80211_softmac_stop_protocol(priv->ieee80211);

	rtl8192_rtx_disable(dev);
	reset_status = _rtl8192_up(dev);

}

void rtl8192_restart(struct work_struct *work)
{
	struct r8192_priv *priv = container_of(work, struct r8192_priv, reset_wq);
	struct net_device *dev = priv->ieee80211->dev;

	down(&priv->wx_sem);

	rtl8192_commit(dev);

	up(&priv->wx_sem);
}

static void r8192_set_multicast(struct net_device *dev)
{
	struct r8192_priv *priv = ieee80211_priv(dev);
	short promisc;

	/* FIXME FIXME */

	promisc = (dev->flags & IFF_PROMISC) ? 1 : 0;

	if (promisc != priv->promisc)

		priv->promisc = promisc;
}


static int r8192_set_mac_adr(struct net_device *dev, void *mac)
{
	struct r8192_priv *priv = ieee80211_priv(dev);
	struct sockaddr *addr = mac;

	down(&priv->wx_sem);

	memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);

	schedule_work(&priv->reset_wq);
	up(&priv->wx_sem);

	return 0;
}

/* based on ipw2200 driver */
static int rtl8192_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
{
	struct r8192_priv *priv = (struct r8192_priv *)ieee80211_priv(dev);
	struct iwreq *wrq = (struct iwreq *)rq;
	int ret = -1;
	struct ieee80211_device *ieee = priv->ieee80211;
	u32 key[4];
	u8 broadcast_addr[6] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
	struct iw_point *p = &wrq->u.data;
	struct ieee_param *ipw = NULL;

	down(&priv->wx_sem);


	if (p->length < sizeof(struct ieee_param) || !p->pointer) {
		ret = -EINVAL;
		goto out;
	}

	ipw = memdup_user(p->pointer, p->length);
	if (IS_ERR(ipw)) {
		ret = PTR_ERR(ipw);
		goto out;
	}

	switch (cmd) {
	case RTL_IOCTL_WPA_SUPPLICANT:
		//parse here for HW security
		if (ipw->cmd == IEEE_CMD_SET_ENCRYPTION) {
			if (ipw->u.crypt.set_tx) {
				if (strcmp(ipw->u.crypt.alg, "CCMP") == 0) {
					ieee->pairwise_key_type = KEY_TYPE_CCMP;
				} else if (strcmp(ipw->u.crypt.alg, "TKIP") == 0) {
					ieee->pairwise_key_type = KEY_TYPE_TKIP;
				} else if (strcmp(ipw->u.crypt.alg, "WEP") == 0) {
					if (ipw->u.crypt.key_len == 13)
						ieee->pairwise_key_type = KEY_TYPE_WEP104;
					else if (ipw->u.crypt.key_len == 5)
						ieee->pairwise_key_type = KEY_TYPE_WEP40;
				} else {
					ieee->pairwise_key_type = KEY_TYPE_NA;
				}

				if (ieee->pairwise_key_type) {
					memcpy((u8 *)key, ipw->u.crypt.key, 16);
					EnableHWSecurityConfig8192(dev);
					//we fill both index entry and 4th entry for pairwise key as in IPW interface, adhoc will only get here, so we need index entry for its default key serching!
					//added by WB.
					setKey(dev, 4, ipw->u.crypt.idx, ieee->pairwise_key_type, (u8 *)ieee->ap_mac_addr, 0, key);
					if (ieee->auth_mode != 2)
						setKey(dev, ipw->u.crypt.idx, ipw->u.crypt.idx, ieee->pairwise_key_type, (u8 *)ieee->ap_mac_addr, 0, key);
				}
			} else {
				memcpy((u8 *)key, ipw->u.crypt.key, 16);
				if (strcmp(ipw->u.crypt.alg, "CCMP") == 0) {
					ieee->group_key_type = KEY_TYPE_CCMP;
				} else if (strcmp(ipw->u.crypt.alg, "TKIP") == 0) {
					ieee->group_key_type = KEY_TYPE_TKIP;
				} else if (strcmp(ipw->u.crypt.alg, "WEP") == 0) {
					if (ipw->u.crypt.key_len == 13)
						ieee->group_key_type = KEY_TYPE_WEP104;
					else if (ipw->u.crypt.key_len == 5)
						ieee->group_key_type = KEY_TYPE_WEP40;
				} else {
					ieee->group_key_type = KEY_TYPE_NA;
				}

				if (ieee->group_key_type) {
					setKey(dev, ipw->u.crypt.idx,
					       ipw->u.crypt.idx,		//KeyIndex
					       ieee->group_key_type,	//KeyType
					       broadcast_addr,	//MacAddr
					       0,		//DefaultKey
					       key);		//KeyContent
				}
			}
		}
		ret = ieee80211_wpa_supplicant_ioctl(priv->ieee80211, &wrq->u.data);
		break;

	default:
		ret = -EOPNOTSUPP;
		break;
	}
	kfree(ipw);
	ipw = NULL;
out:
	up(&priv->wx_sem);
	return ret;
}

static u8 HwRateToMRate90(bool bIsHT, u8 rate)
{
	u8  ret_rate = 0xff;

	if (!bIsHT) {
		switch (rate) {
			case DESC90_RATE1M:
				ret_rate = MGN_1M;
				break;
			case DESC90_RATE2M:
				ret_rate = MGN_2M;
				break;
			case DESC90_RATE5_5M:
				ret_rate = MGN_5_5M;
				break;
			case DESC90_RATE11M:
				ret_rate = MGN_11M;
				break;
			case DESC90_RATE6M:
				ret_rate = MGN_6M;
				break;
			case DESC90_RATE9M:
				ret_rate = MGN_9M;
				break;
			case DESC90_RATE12M:
				ret_rate = MGN_12M;
				break;
			case DESC90_RATE18M:
				ret_rate = MGN_18M;
				break;
			case DESC90_RATE24M:
				ret_rate = MGN_24M;
				break;
			case DESC90_RATE36M:
				ret_rate = MGN_36M;
				break;
			case DESC90_RATE48M:
				ret_rate = MGN_48M;
				break;
			case DESC90_RATE54M:
				ret_rate = MGN_54M;
				break;

			default:
				ret_rate = 0xff;
				RT_TRACE(COMP_RECV, "HwRateToMRate90(): Non supported Rate [%x], bIsHT = %d!!!\n", rate, bIsHT);
				break;
		}

	} else {
		switch (rate) {
			case DESC90_RATEMCS0:
				ret_rate = MGN_MCS0;
				break;
			case DESC90_RATEMCS1:
				ret_rate = MGN_MCS1;
				break;
			case DESC90_RATEMCS2:
				ret_rate = MGN_MCS2;
				break;
			case DESC90_RATEMCS3:
				ret_rate = MGN_MCS3;
				break;
			case DESC90_RATEMCS4:
				ret_rate = MGN_MCS4;
				break;
			case DESC90_RATEMCS5:
				ret_rate = MGN_MCS5;
				break;
			case DESC90_RATEMCS6:
				ret_rate = MGN_MCS6;
				break;
			case DESC90_RATEMCS7:
				ret_rate = MGN_MCS7;
				break;
			case DESC90_RATEMCS8:
				ret_rate = MGN_MCS8;
				break;
			case DESC90_RATEMCS9:
				ret_rate = MGN_MCS9;
				break;
			case DESC90_RATEMCS10:
				ret_rate = MGN_MCS10;
				break;
			case DESC90_RATEMCS11:
				ret_rate = MGN_MCS11;
				break;
			case DESC90_RATEMCS12:
				ret_rate = MGN_MCS12;
				break;
			case DESC90_RATEMCS13:
				ret_rate = MGN_MCS13;
				break;
			case DESC90_RATEMCS14:
				ret_rate = MGN_MCS14;
				break;
			case DESC90_RATEMCS15:
				ret_rate = MGN_MCS15;
				break;
			case DESC90_RATEMCS32:
				ret_rate = (0x80|0x20);
				break;

			default:
				ret_rate = 0xff;
				RT_TRACE(COMP_RECV, "HwRateToMRate90(): Non supported Rate [%x], bIsHT = %d!!!\n", rate, bIsHT);
				break;
		}
	}

	return ret_rate;
}

/**
 * Function:     UpdateRxPktTimeStamp
 * Overview:     Record the TSF time stamp when receiving a packet
 *
 * Input:
 *       PADAPTER        Adapter
 *       PRT_RFD         pRfd,
 *
 * Output:
 *       PRT_RFD         pRfd
 *                               (pRfd->Status.TimeStampHigh is updated)
 *                               (pRfd->Status.TimeStampLow is updated)
 * Return:
 *               None
 */
static void UpdateRxPktTimeStamp8190(struct net_device *dev,
				     struct ieee80211_rx_stats *stats)
{
	struct r8192_priv *priv = (struct r8192_priv *)ieee80211_priv(dev);

	if (stats->bIsAMPDU && !stats->bFirstMPDU) {
		stats->mac_time[0] = priv->LastRxDescTSFLow;
		stats->mac_time[1] = priv->LastRxDescTSFHigh;
	} else {
		priv->LastRxDescTSFLow = stats->mac_time[0];
		priv->LastRxDescTSFHigh = stats->mac_time[1];
	}
}

//by amy 080606

static long rtl819x_translate_todbm(u8 signal_strength_index)// 0-100 index.
{
	long	signal_power; // in dBm.

	// Translate to dBm (x=0.5y-95).
	signal_power = (long)((signal_strength_index + 1) >> 1);
	signal_power -= 95;

	return signal_power;
}


/* 2008/01/22 MH We can not declare RSSI/EVM total value of sliding window to
    be a local static. Otherwise, it may increase when we return from S3/S4. The
    value will be kept in memory or disk. Declare the value in the adaptor
    and it will be reinitialized when returned from S3/S4. */
static void rtl8192_process_phyinfo(struct r8192_priv *priv, u8 *buffer,
				    struct ieee80211_rx_stats *pprevious_stats,
				    struct ieee80211_rx_stats *pcurrent_stats)
{
	bool bcheck = false;
	u8	rfpath;
	u32	nspatial_stream, tmp_val;
	static u32 slide_rssi_index, slide_rssi_statistics;
	static u32 slide_evm_index, slide_evm_statistics;
	static u32 last_rssi, last_evm;

	static u32 slide_beacon_adc_pwdb_index, slide_beacon_adc_pwdb_statistics;
	static u32 last_beacon_adc_pwdb;

	struct ieee80211_hdr_3addr *hdr;
	u16 sc;
	unsigned int frag, seq;
	hdr = (struct ieee80211_hdr_3addr *)buffer;
	sc = le16_to_cpu(hdr->seq_ctl);
	frag = WLAN_GET_SEQ_FRAG(sc);
	seq = WLAN_GET_SEQ_SEQ(sc);
	//cosa add 04292008 to record the sequence number
	pcurrent_stats->Seq_Num = seq;
	//
	// Check whether we should take the previous packet into accounting
	//
	if (!pprevious_stats->bIsAMPDU) {
		// if previous packet is not aggregated packet
		bcheck = true;
	}

	if (slide_rssi_statistics++ >= PHY_RSSI_SLID_WIN_MAX) {
		slide_rssi_statistics = PHY_RSSI_SLID_WIN_MAX;
		last_rssi = priv->stats.slide_signal_strength[slide_rssi_index];
		priv->stats.slide_rssi_total -= last_rssi;
	}
	priv->stats.slide_rssi_total += pprevious_stats->SignalStrength;

	priv->stats.slide_signal_strength[slide_rssi_index++] = pprevious_stats->SignalStrength;
	if (slide_rssi_index >= PHY_RSSI_SLID_WIN_MAX)
		slide_rssi_index = 0;

	// <1> Showed on UI for user, in dbm
	tmp_val = priv->stats.slide_rssi_total/slide_rssi_statistics;
	priv->stats.signal_strength = rtl819x_translate_todbm((u8)tmp_val);
	pcurrent_stats->rssi = priv->stats.signal_strength;
	//
	// If the previous packet does not match the criteria, neglect it
	//
	if (!pprevious_stats->bPacketMatchBSSID) {
		if (!pprevious_stats->bToSelfBA)
			return;
	}

	if (!bcheck)
		return;


	//rtl8190_process_cck_rxpathsel(priv,pprevious_stats);//only rtl8190 supported

	//
	// Check RSSI
	//
	priv->stats.num_process_phyinfo++;

	/* record the general signal strength to the sliding window. */


	// <2> Showed on UI for engineering
	// hardware does not provide rssi information for each rf path in CCK
	if (!pprevious_stats->bIsCCK && (pprevious_stats->bPacketToSelf || pprevious_stats->bToSelfBA)) {
		for (rfpath = RF90_PATH_A; rfpath < priv->NumTotalRFPath; rfpath++) {
			if (!rtl8192_phy_CheckIsLegalRFPath(priv->ieee80211->dev, rfpath))
				continue;

			//Fixed by Jacken 2008-03-20
			if (priv->stats.rx_rssi_percentage[rfpath] == 0)
				priv->stats.rx_rssi_percentage[rfpath] = pprevious_stats->RxMIMOSignalStrength[rfpath];
			if (pprevious_stats->RxMIMOSignalStrength[rfpath]  > priv->stats.rx_rssi_percentage[rfpath]) {
				priv->stats.rx_rssi_percentage[rfpath] =
					((priv->stats.rx_rssi_percentage[rfpath]*(Rx_Smooth_Factor-1)) +
					 (pprevious_stats->RxMIMOSignalStrength[rfpath])) /(Rx_Smooth_Factor);
				priv->stats.rx_rssi_percentage[rfpath] = priv->stats.rx_rssi_percentage[rfpath]  + 1;
			} else {
				priv->stats.rx_rssi_percentage[rfpath] =
					((priv->stats.rx_rssi_percentage[rfpath]*(Rx_Smooth_Factor-1)) +
					 (pprevious_stats->RxMIMOSignalStrength[rfpath])) /(Rx_Smooth_Factor);
			}
			RT_TRACE(COMP_DBG, "priv->stats.rx_rssi_percentage[rfPath]  = %d \n", priv->stats.rx_rssi_percentage[rfpath]);
		}
	}


	//
	// Check PWDB.
	//
	RT_TRACE(COMP_RXDESC, "Smooth %s PWDB = %d\n",
		 pprevious_stats->bIsCCK ? "CCK" : "OFDM",
		 pprevious_stats->RxPWDBAll);

	if (pprevious_stats->bPacketBeacon) {
		/* record the beacon pwdb to the sliding window. */
		if (slide_beacon_adc_pwdb_statistics++ >= PHY_Beacon_RSSI_SLID_WIN_MAX) {
			slide_beacon_adc_pwdb_statistics = PHY_Beacon_RSSI_SLID_WIN_MAX;
			last_beacon_adc_pwdb = priv->stats.Slide_Beacon_pwdb[slide_beacon_adc_pwdb_index];
			priv->stats.Slide_Beacon_Total -= last_beacon_adc_pwdb;
		}
		priv->stats.Slide_Beacon_Total += pprevious_stats->RxPWDBAll;
		priv->stats.Slide_Beacon_pwdb[slide_beacon_adc_pwdb_index] = pprevious_stats->RxPWDBAll;
		slide_beacon_adc_pwdb_index++;
		if (slide_beacon_adc_pwdb_index >= PHY_Beacon_RSSI_SLID_WIN_MAX)
			slide_beacon_adc_pwdb_index = 0;
		pprevious_stats->RxPWDBAll = priv->stats.Slide_Beacon_Total/slide_beacon_adc_pwdb_statistics;
		if (pprevious_stats->RxPWDBAll >= 3)
			pprevious_stats->RxPWDBAll -= 3;
	}

	RT_TRACE(COMP_RXDESC, "Smooth %s PWDB = %d\n",
		 pprevious_stats->bIsCCK ? "CCK" : "OFDM",
		 pprevious_stats->RxPWDBAll);


	if (pprevious_stats->bPacketToSelf || pprevious_stats->bPacketBeacon || pprevious_stats->bToSelfBA) {
		if (priv->undecorated_smoothed_pwdb < 0)	/* initialize */
			priv->undecorated_smoothed_pwdb = pprevious_stats->RxPWDBAll;
		if (pprevious_stats->RxPWDBAll > (u32)priv->undecorated_smoothed_pwdb) {
			priv->undecorated_smoothed_pwdb =
				(((priv->undecorated_smoothed_pwdb)*(Rx_Smooth_Factor-1)) +
				 (pprevious_stats->RxPWDBAll)) /(Rx_Smooth_Factor);
			priv->undecorated_smoothed_pwdb = priv->undecorated_smoothed_pwdb + 1;
		} else {
			priv->undecorated_smoothed_pwdb =
				(((priv->undecorated_smoothed_pwdb)*(Rx_Smooth_Factor-1)) +
				 (pprevious_stats->RxPWDBAll)) /(Rx_Smooth_Factor);
		}

	}

	//
	// Check EVM
	//
	/* record the general EVM to the sliding window. */
	if (pprevious_stats->SignalQuality) {
		if (pprevious_stats->bPacketToSelf || pprevious_stats->bPacketBeacon || pprevious_stats->bToSelfBA) {
			if (slide_evm_statistics++ >= PHY_RSSI_SLID_WIN_MAX) {
				slide_evm_statistics = PHY_RSSI_SLID_WIN_MAX;
				last_evm = priv->stats.slide_evm[slide_evm_index];
				priv->stats.slide_evm_total -= last_evm;
			}

			priv->stats.slide_evm_total += pprevious_stats->SignalQuality;

			priv->stats.slide_evm[slide_evm_index++] = pprevious_stats->SignalQuality;
			if (slide_evm_index >= PHY_RSSI_SLID_WIN_MAX)
				slide_evm_index = 0;

			// <1> Showed on UI for user, in percentage.
			tmp_val = priv->stats.slide_evm_total/slide_evm_statistics;
			priv->stats.signal_quality = tmp_val;
			//cosa add 10/11/2007, Showed on UI for user in Windows Vista, for Link quality.
			priv->stats.last_signal_strength_inpercent = tmp_val;
		}

		// <2> Showed on UI for engineering
		if (pprevious_stats->bPacketToSelf || pprevious_stats->bPacketBeacon || pprevious_stats->bToSelfBA) {
			for (nspatial_stream = 0; nspatial_stream < 2; nspatial_stream++) { /* 2 spatial stream */
				if (pprevious_stats->RxMIMOSignalQuality[nspatial_stream] != -1) {
					if (priv->stats.rx_evm_percentage[nspatial_stream] == 0) /* initialize */
						priv->stats.rx_evm_percentage[nspatial_stream] = pprevious_stats->RxMIMOSignalQuality[nspatial_stream];
					priv->stats.rx_evm_percentage[nspatial_stream] =
						((priv->stats.rx_evm_percentage[nspatial_stream]* (Rx_Smooth_Factor-1)) +
						 (pprevious_stats->RxMIMOSignalQuality[nspatial_stream]* 1)) / (Rx_Smooth_Factor);
				}
			}
		}
	}


}

/*-----------------------------------------------------------------------------
 * Function:	rtl819x_query_rxpwrpercentage()
 *
 * Overview:
 *
 * Input:		char		antpower
 *
 * Output:		NONE
 *
 * Return:		0-100 percentage
 *
 * Revised History:
 *	When		Who		Remark
 *	05/26/2008	amy		Create Version 0 porting from windows code.
 *
 *---------------------------------------------------------------------------*/
static u8 rtl819x_query_rxpwrpercentage(char antpower)
{
	if ((antpower <= -100) || (antpower >= 20))
		return	0;
	else if (antpower >= 0)
		return	100;
	else
		return	100 + antpower;

}	/* QueryRxPwrPercentage */

static u8 rtl819x_evm_dbtopercentage(char value)
{
	char ret_val;

	ret_val = value;

	if (ret_val >= 0)
		ret_val = 0;
	if (ret_val <= -33)
		ret_val = -33;
	ret_val = 0 - ret_val;
	ret_val *= 3;
	if (ret_val == 99)
		ret_val = 100;
	return ret_val;
}
//
//	Description:
//	We want good-looking for signal strength/quality
//	2007/7/19 01:09, by cosa.
//
static long rtl819x_signal_scale_mapping(long currsig)
{
	long retsig;

	// Step 1. Scale mapping.
	if (currsig >= 61 && currsig <= 100)
		retsig = 90 + ((currsig - 60) / 4);
	else if (currsig >= 41 && currsig <= 60)
		retsig = 78 + ((currsig - 40) / 2);
	else if (currsig >= 31 && currsig <= 40)
		retsig = 66 + (currsig - 30);
	else if (currsig >= 21 && currsig <= 30)
		retsig = 54 + (currsig - 20);
	else if (currsig >= 5 && currsig <= 20)
		retsig = 42 + (((currsig - 5) * 2) / 3);
	else if (currsig == 4)
		retsig = 36;
	else if (currsig == 3)
		retsig = 27;
	else if (currsig == 2)
		retsig = 18;
	else if (currsig == 1)
		retsig = 9;
	else
		retsig = currsig;

	return retsig;
}

static inline bool rx_hal_is_cck_rate(struct rx_drvinfo_819x_usb *pdrvinfo)
{
	if (pdrvinfo->RxHT)
		return false;

	switch (pdrvinfo->RxRate) {
	case DESC90_RATE1M:
	case DESC90_RATE2M:
	case DESC90_RATE5_5M:
	case DESC90_RATE11M:
		return true;
	default:
		return false;
	}
}

static void rtl8192_query_rxphystatus(struct r8192_priv *priv,
				      struct ieee80211_rx_stats *pstats,
				      rx_drvinfo_819x_usb  *pdrvinfo,
				      struct ieee80211_rx_stats *precord_stats,
				      bool bpacket_match_bssid,
				      bool bpacket_toself,
				      bool bPacketBeacon,
				      bool bToSelfBA)
{
	phy_sts_ofdm_819xusb_t *pofdm_buf;
	phy_sts_cck_819xusb_t	*pcck_buf;
	phy_ofdm_rx_status_rxsc_sgien_exintfflag *prxsc;
	u8				*prxpkt;
	u8				i, max_spatial_stream, tmp_rxsnr, tmp_rxevm, rxsc_sgien_exflg;
	char				rx_pwr[4], rx_pwr_all = 0;
	char				rx_snrX, rx_evmX;
	u8				evm, pwdb_all;
	u32				RSSI, total_rssi = 0;
	u8				is_cck_rate = 0;
	u8				rf_rx_num = 0;
	u8				sq;


	priv->stats.numqry_phystatus++;

	is_cck_rate = rx_hal_is_cck_rate(pdrvinfo);

	// Record it for next packet processing
	memset(precord_stats, 0, sizeof(struct ieee80211_rx_stats));
	pstats->bPacketMatchBSSID = precord_stats->bPacketMatchBSSID = bpacket_match_bssid;
	pstats->bPacketToSelf = precord_stats->bPacketToSelf = bpacket_toself;
	pstats->bIsCCK = precord_stats->bIsCCK = is_cck_rate;
	pstats->bPacketBeacon = precord_stats->bPacketBeacon = bPacketBeacon;
	pstats->bToSelfBA = precord_stats->bToSelfBA = bToSelfBA;

	prxpkt = (u8 *)pdrvinfo;

	/* Move pointer to the 16th bytes. Phy status start address. */
	prxpkt += sizeof(rx_drvinfo_819x_usb);

	/* Initial the cck and ofdm buffer pointer */
	pcck_buf = (phy_sts_cck_819xusb_t *)prxpkt;
	pofdm_buf = (phy_sts_ofdm_819xusb_t *)prxpkt;

	pstats->RxMIMOSignalQuality[0] = -1;
	pstats->RxMIMOSignalQuality[1] = -1;
	precord_stats->RxMIMOSignalQuality[0] = -1;
	precord_stats->RxMIMOSignalQuality[1] = -1;

	if (is_cck_rate) {
		//
		// (1)Hardware does not provide RSSI for CCK
		//

		//
		// (2)PWDB, Average PWDB cacluated by hardware (for rate adaptive)
		//
		u8 report;

		priv->stats.numqry_phystatusCCK++;

		if (!priv->bCckHighPower) {
			report = pcck_buf->cck_agc_rpt & 0xc0;
			report = report>>6;
			switch (report) {
				//Fixed by Jacken from Bryant 2008-03-20
				//Original value is -38 , -26 , -14 , -2
				//Fixed value is -35 , -23 , -11 , 6
			case 0x3:
				rx_pwr_all = -35 - (pcck_buf->cck_agc_rpt & 0x3e);
				break;
			case 0x2:
				rx_pwr_all = -23 - (pcck_buf->cck_agc_rpt & 0x3e);
				break;
			case 0x1:
				rx_pwr_all = -11 - (pcck_buf->cck_agc_rpt & 0x3e);
				break;
			case 0x0:
				rx_pwr_all = 6 - (pcck_buf->cck_agc_rpt & 0x3e);
				break;
			}
		} else {
			report = pcck_buf->cck_agc_rpt & 0x60;
			report = report>>5;
			switch (report) {
			case 0x3:
				rx_pwr_all = -35 - ((pcck_buf->cck_agc_rpt & 0x1f)<<1);
				break;
			case 0x2:
				rx_pwr_all = -23 - ((pcck_buf->cck_agc_rpt & 0x1f)<<1);
				break;
			case 0x1:
				rx_pwr_all = -11 - ((pcck_buf->cck_agc_rpt & 0x1f)<<1);
				break;
			case 0x0:
				rx_pwr_all = 6 - ((pcck_buf->cck_agc_rpt & 0x1f)<<1);
				break;
			}
		}

		pwdb_all = rtl819x_query_rxpwrpercentage(rx_pwr_all);
		pstats->RxPWDBAll = precord_stats->RxPWDBAll = pwdb_all;
		pstats->RecvSignalPower = pwdb_all;

		//
		// (3) Get Signal Quality (EVM)
		//

		if (pstats->RxPWDBAll > 40) {
			sq = 100;
		} else {
			sq = pcck_buf->sq_rpt;

			if (pcck_buf->sq_rpt > 64)
				sq = 0;
			else if (pcck_buf->sq_rpt < 20)
				sq = 100;
			else
				sq = ((64-sq) * 100) / 44;
		}
		pstats->SignalQuality = precord_stats->SignalQuality = sq;
		pstats->RxMIMOSignalQuality[0] = precord_stats->RxMIMOSignalQuality[0] = sq;
		pstats->RxMIMOSignalQuality[1] = precord_stats->RxMIMOSignalQuality[1] = -1;

	} else {
		priv->stats.numqry_phystatusHT++;
		//
		// (1)Get RSSI for HT rate
		//
		for (i = RF90_PATH_A; i < priv->NumTotalRFPath; i++) {
			// 2008/01/30 MH we will judge RF RX path now.
			if (priv->brfpath_rxenable[i])
				rf_rx_num++;
			else
				continue;

			if (!rtl8192_phy_CheckIsLegalRFPath(priv->ieee80211->dev, i))
				continue;

			//Fixed by Jacken from Bryant 2008-03-20
			//Original value is 106
			rx_pwr[i] = ((pofdm_buf->trsw_gain_X[i]&0x3F)*2) - 106;

			//Get Rx snr value in DB
			tmp_rxsnr =	pofdm_buf->rxsnr_X[i];
			rx_snrX = (char)(tmp_rxsnr);
			rx_snrX /= 2;
			priv->stats.rxSNRdB[i] = (long)rx_snrX;

			/* Translate DBM to percentage. */
			RSSI = rtl819x_query_rxpwrpercentage(rx_pwr[i]);
			total_rssi += RSSI;

			/* Record Signal Strength for next packet */
			pstats->RxMIMOSignalStrength[i] = (u8) RSSI;
			precord_stats->RxMIMOSignalStrength[i] = (u8) RSSI;
		}


		//
		// (2)PWDB, Average PWDB cacluated by hardware (for rate adaptive)
		//
		//Fixed by Jacken from Bryant 2008-03-20
		//Original value is 106
		rx_pwr_all = (((pofdm_buf->pwdb_all) >> 1)& 0x7f) -106;
		pwdb_all = rtl819x_query_rxpwrpercentage(rx_pwr_all);

		pstats->RxPWDBAll = precord_stats->RxPWDBAll = pwdb_all;
		pstats->RxPower = precord_stats->RxPower =  rx_pwr_all;

		//
		// (3)EVM of HT rate
		//
		if (pdrvinfo->RxHT && pdrvinfo->RxRate >= DESC90_RATEMCS8 &&
		    pdrvinfo->RxRate <= DESC90_RATEMCS15)
			max_spatial_stream = 2; //both spatial stream make sense
		else
			max_spatial_stream = 1; //only spatial stream 1 makes sense

		for (i = 0; i < max_spatial_stream; i++) {
			tmp_rxevm =	pofdm_buf->rxevm_X[i];
			rx_evmX = (char)(tmp_rxevm);

			// Do not use shift operation like "rx_evmX >>= 1" because the compiler of free build environment
			// will set the most significant bit to "zero" when doing shifting operation which may change a negative
			// value to positive one, then the dbm value (which is supposed to be negative)  is not correct anymore.
			rx_evmX /= 2;	//dbm

			evm = rtl819x_evm_dbtopercentage(rx_evmX);
			if (i == 0) /* Fill value in RFD, Get the first spatial stream only */
				pstats->SignalQuality = precord_stats->SignalQuality = (u8)(evm & 0xff);
			pstats->RxMIMOSignalQuality[i] = precord_stats->RxMIMOSignalQuality[i] = (u8)(evm & 0xff);
		}


		/* record rx statistics for debug */
		rxsc_sgien_exflg = pofdm_buf->rxsc_sgien_exflg;
		prxsc =	(phy_ofdm_rx_status_rxsc_sgien_exintfflag *)&rxsc_sgien_exflg;
		if (pdrvinfo->BW)	/* 40M channel */
			priv->stats.received_bwtype[1+prxsc->rxsc]++;
		else				//20M channel
			priv->stats.received_bwtype[0]++;
	}

	//UI BSS List signal strength(in percentage), make it good looking, from 0~100.
	//It is assigned to the BSS List in GetValueFromBeaconOrProbeRsp().
	if (is_cck_rate) {
		pstats->SignalStrength = precord_stats->SignalStrength = (u8)(rtl819x_signal_scale_mapping((long)pwdb_all));
	} else {
		// We can judge RX path number now.
		if (rf_rx_num != 0)
			pstats->SignalStrength = precord_stats->SignalStrength = (u8)(rtl819x_signal_scale_mapping((long)(total_rssi /= rf_rx_num)));
	}
}	/* QueryRxPhyStatus8190Pci */

static void rtl8192_record_rxdesc_forlateruse(struct ieee80211_rx_stats *psrc_stats,
					      struct ieee80211_rx_stats *ptarget_stats)
{
	ptarget_stats->bIsAMPDU = psrc_stats->bIsAMPDU;
	ptarget_stats->bFirstMPDU = psrc_stats->bFirstMPDU;
	ptarget_stats->Seq_Num = psrc_stats->Seq_Num;
}


static void TranslateRxSignalStuff819xUsb(struct sk_buff *skb,
					  struct ieee80211_rx_stats *pstats,
					  rx_drvinfo_819x_usb  *pdrvinfo)
{
	// TODO: We must only check packet for current MAC address. Not finish
	rtl8192_rx_info *info = (struct rtl8192_rx_info *)skb->cb;
	struct net_device *dev = info->dev;
	struct r8192_priv *priv = (struct r8192_priv *)ieee80211_priv(dev);
	bool bpacket_match_bssid, bpacket_toself;
	bool bPacketBeacon = FALSE, bToSelfBA = FALSE;
	static struct ieee80211_rx_stats  previous_stats;
	struct ieee80211_hdr_3addr *hdr;//by amy
	u16 fc, type;

	// Get Signal Quality for only RX data queue (but not command queue)

	u8 *tmp_buf;
	u8  *praddr;

	/* Get MAC frame start address. */
	tmp_buf = (u8 *)skb->data;

	hdr = (struct ieee80211_hdr_3addr *)tmp_buf;
	fc = le16_to_cpu(hdr->frame_ctl);
	type = WLAN_FC_GET_TYPE(fc);
	praddr = hdr->addr1;

	/* Check if the received packet is acceptable. */
	bpacket_match_bssid = ((IEEE80211_FTYPE_CTL != type) &&
			       (eqMacAddr(priv->ieee80211->current_network.bssid,  (fc & IEEE80211_FCTL_TODS) ? hdr->addr1 : (fc & IEEE80211_FCTL_FROMDS) ? hdr->addr2 : hdr->addr3))
			       && (!pstats->bHwError) && (!pstats->bCRC) && (!pstats->bICV));
	bpacket_toself =  bpacket_match_bssid & (eqMacAddr(praddr, priv->ieee80211->dev->dev_addr));

	if (WLAN_FC_GET_FRAMETYPE(fc) == IEEE80211_STYPE_BEACON)
		bPacketBeacon = true;
	if (WLAN_FC_GET_FRAMETYPE(fc) == IEEE80211_STYPE_BLOCKACK) {
		if ((eqMacAddr(praddr, dev->dev_addr)))
			bToSelfBA = true;
	}


	if (bpacket_match_bssid)
		priv->stats.numpacket_matchbssid++;
	if (bpacket_toself)
		priv->stats.numpacket_toself++;
	//
	// Process PHY information for previous packet (RSSI/PWDB/EVM)
	//
	// Because phy information is contained in the last packet of AMPDU only, so driver
	// should process phy information of previous packet
	rtl8192_process_phyinfo(priv, tmp_buf, &previous_stats, pstats);
	rtl8192_query_rxphystatus(priv, pstats, pdrvinfo, &previous_stats, bpacket_match_bssid, bpacket_toself, bPacketBeacon, bToSelfBA);
	rtl8192_record_rxdesc_forlateruse(pstats, &previous_stats);

}

/**
* Function:	UpdateReceivedRateHistogramStatistics
* Overview:	Record the received data rate
*
* Input:
*	struct net_device *dev
*	struct ieee80211_rx_stats *stats
*
* Output:
*
*			(priv->stats.ReceivedRateHistogram[] is updated)
* Return:
*		None
*/
static void
UpdateReceivedRateHistogramStatistics8190(struct net_device *dev,
					  struct ieee80211_rx_stats *stats)
{
	struct r8192_priv *priv = (struct r8192_priv *)ieee80211_priv(dev);
	u32 rcvType = 1;   //0: Total, 1:OK, 2:CRC, 3:ICV
	u32 rateIndex;
	u32 preamble_guardinterval;  //1: short preamble/GI, 0: long preamble/GI


	if (stats->bCRC)
		rcvType = 2;
	else if (stats->bICV)
		rcvType = 3;

	if (stats->bShortPreamble)
		preamble_guardinterval = 1;// short
	else
		preamble_guardinterval = 0;// long

	switch (stats->rate) {
	/* CCK rate */
	case MGN_1M:
		rateIndex = 0;
		break;
	case MGN_2M:
		rateIndex = 1;
		break;
	case MGN_5_5M:
		rateIndex = 2;
		break;
	case MGN_11M:
		rateIndex = 3;
		break;
	/* Legacy OFDM rate */
	case MGN_6M:
		rateIndex = 4;
		break;
	case MGN_9M:
		rateIndex = 5;
		break;
	case MGN_12M:
		rateIndex = 6;
		break;
	case MGN_18M:
		rateIndex = 7;
		break;
	case MGN_24M:
		rateIndex = 8;
		break;
	case MGN_36M:
		rateIndex = 9;
		break;
	case MGN_48M:
		rateIndex = 10;
		break;
	case MGN_54M:
		rateIndex = 11;
		break;
	/* 11n High throughput rate */
	case MGN_MCS0:
		rateIndex = 12;
		break;
	case MGN_MCS1:
		rateIndex = 13;
		break;
	case MGN_MCS2:
		rateIndex = 14;
		break;
	case MGN_MCS3:
		rateIndex = 15;
		break;
	case MGN_MCS4:
		rateIndex = 16;
		break;
	case MGN_MCS5:
		rateIndex = 17;
		break;
	case MGN_MCS6:
		rateIndex = 18;
		break;
	case MGN_MCS7:
		rateIndex = 19;
		break;
	case MGN_MCS8:
		rateIndex = 20;
		break;
	case MGN_MCS9:
		rateIndex = 21;
		break;
	case MGN_MCS10:
		rateIndex = 22;
		break;
	case MGN_MCS11:
		rateIndex = 23;
		break;
	case MGN_MCS12:
		rateIndex = 24;
		break;
	case MGN_MCS13:
		rateIndex = 25;
		break;
	case MGN_MCS14:
		rateIndex = 26;
		break;
	case MGN_MCS15:
		rateIndex = 27;
		break;
	default:
		rateIndex = 28;
		break;
	}
	priv->stats.received_preamble_GI[preamble_guardinterval][rateIndex]++;
	priv->stats.received_rate_histogram[0][rateIndex]++; //total
	priv->stats.received_rate_histogram[rcvType][rateIndex]++;
}


static void query_rxdesc_status(struct sk_buff *skb,
				struct ieee80211_rx_stats *stats,
				bool bIsRxAggrSubframe)
{
	rtl8192_rx_info *info = (struct rtl8192_rx_info *)skb->cb;
	struct net_device *dev = info->dev;
	struct r8192_priv *priv = (struct r8192_priv *)ieee80211_priv(dev);
	rx_drvinfo_819x_usb  *driver_info = NULL;

	//
	//Get Rx Descriptor Information
	//
	rx_desc_819x_usb *desc = (rx_desc_819x_usb *)skb->data;

	stats->Length = desc->Length;
	stats->RxDrvInfoSize = desc->RxDrvInfoSize;
	stats->RxBufShift = 0;
	stats->bICV = desc->ICV;
	stats->bCRC = desc->CRC32;
	stats->bHwError = stats->bCRC|stats->bICV;
	/* RTL8190 set this bit to indicate that Hw does not decrypt packet */
	stats->Decrypted = !desc->SWDec;

	if ((priv->ieee80211->pHTInfo->bCurrentHTSupport == true) && (priv->ieee80211->pairwise_key_type == KEY_TYPE_CCMP))
		stats->bHwError = false;
	else
		stats->bHwError = stats->bCRC|stats->bICV;

	if (stats->Length < 24 || stats->Length > MAX_8192U_RX_SIZE)
		stats->bHwError |= 1;
	//
	//Get Driver Info
	//
	// TODO: Need to verify it on FGPA platform
	//Driver info are written to the RxBuffer following rx desc
	if (stats->RxDrvInfoSize != 0) {
		driver_info = (rx_drvinfo_819x_usb *)(skb->data + sizeof(rx_desc_819x_usb) +
						      stats->RxBufShift);
		/* unit: 0.5M */
		/* TODO */
		if (!stats->bHwError) {
			u8	ret_rate;
			ret_rate = HwRateToMRate90(driver_info->RxHT, driver_info->RxRate);
			if (ret_rate == 0xff) {
				// Abnormal Case: Receive CRC OK packet with Rx descriptor indicating non supported rate.
				// Special Error Handling here, 2008.05.16, by Emily

				stats->bHwError = 1;
				stats->rate = MGN_1M;	//Set 1M rate by default
			} else {
				stats->rate = ret_rate;
			}
		} else {
			stats->rate = 0x02;
		}

		stats->bShortPreamble = driver_info->SPLCP;


		UpdateReceivedRateHistogramStatistics8190(dev, stats);

		stats->bIsAMPDU = (driver_info->PartAggr == 1);
		stats->bFirstMPDU = (driver_info->PartAggr == 1) && (driver_info->FirstAGGR == 1);
		stats->TimeStampLow = driver_info->TSFL;
		// xiong mask it, 070514

		UpdateRxPktTimeStamp8190(dev, stats);

		//
		// Rx A-MPDU
		//
		if (driver_info->FirstAGGR == 1 || driver_info->PartAggr == 1)
			RT_TRACE(COMP_RXDESC, "driver_info->FirstAGGR = %d, driver_info->PartAggr = %d\n",
				 driver_info->FirstAGGR, driver_info->PartAggr);

	}

	skb_pull(skb, sizeof(rx_desc_819x_usb));
	//
	// Get Total offset of MPDU Frame Body
	//
	if ((stats->RxBufShift + stats->RxDrvInfoSize) > 0) {
		stats->bShift = 1;
		skb_pull(skb, stats->RxBufShift + stats->RxDrvInfoSize);
	}

	/* for debug 2008.5.29 */

	//added by vivi, for MP, 20080108
	stats->RxIs40MHzPacket = driver_info->BW;
	if (stats->RxDrvInfoSize != 0)
		TranslateRxSignalStuff819xUsb(skb, stats, driver_info);

}

static void rtl8192_rx_nomal(struct sk_buff *skb)
{
	rtl8192_rx_info *info = (struct rtl8192_rx_info *)skb->cb;
	struct net_device *dev = info->dev;
	struct r8192_priv *priv = (struct r8192_priv *)ieee80211_priv(dev);
	struct ieee80211_rx_stats stats = {
		.signal = 0,
		.noise = -98,
		.rate = 0,
		.freq = IEEE80211_24GHZ_BAND,
	};
	u32 rx_pkt_len = 0;
	struct ieee80211_hdr_1addr *ieee80211_hdr = NULL;
	bool unicast_packet = false;

	/* 20 is for ps-poll */
	if ((skb->len >= (20 + sizeof(rx_desc_819x_usb))) && (skb->len < RX_URB_SIZE)) {
		/* first packet should not contain Rx aggregation header */
		query_rxdesc_status(skb, &stats, false);
		/* TODO */
		/* hardware related info */
		/* Process the MPDU received */
		skb_trim(skb, skb->len - 4/*sCrcLng*/);

		rx_pkt_len = skb->len;
		ieee80211_hdr = (struct ieee80211_hdr_1addr *)skb->data;
		unicast_packet = false;
		if (is_broadcast_ether_addr(ieee80211_hdr->addr1)) {
			//TODO
		} else if (is_multicast_ether_addr(ieee80211_hdr->addr1)) {
			//TODO
		} else {
			/* unicast packet */
			unicast_packet = true;
		}

		if (!ieee80211_rx(priv->ieee80211, skb, &stats)) {
			dev_kfree_skb_any(skb);
		} else {
			priv->stats.rxoktotal++;
			if (unicast_packet)
				priv->stats.rxbytesunicast += rx_pkt_len;
		}
	} else {
		priv->stats.rxurberr++;
		netdev_dbg(dev, "actual_length: %d\n", skb->len);
		dev_kfree_skb_any(skb);
	}

}

static void rtl819xusb_process_received_packet(struct net_device *dev,
					       struct ieee80211_rx_stats *pstats)
{
	u8	*frame;
	u16     frame_len = 0;
	struct r8192_priv *priv = ieee80211_priv(dev);

	// Get shifted bytes of Starting address of 802.11 header. 2006.09.28, by Emily
	//porting by amy 080508
	pstats->virtual_address += get_rxpacket_shiftbytes_819xusb(pstats);
	frame = pstats->virtual_address;
	frame_len = pstats->packetlength;
#ifdef TODO	// by amy about HCT
	if (!Adapter->bInHctTest)
		CountRxErrStatistics(Adapter, pRfd);
#endif
#ifdef ENABLE_PS  //by amy for adding ps function in future
	RT_RF_POWER_STATE rtState;
	// When RF is off, we should not count the packet for hw/sw synchronize
	// reason, ie. there may be a duration while sw switch is changed and hw
	// switch is being changed. 2006.12.04, by shien chang.
	Adapter->HalFunc.GetHwRegHandler(Adapter, HW_VAR_RF_STATE, (u8 *)(&rtState));
	if (rtState == eRfOff)
		return;
#endif
	priv->stats.rxframgment++;

#ifdef TODO
	RmMonitorSignalStrength(Adapter, pRfd);
#endif
	/* 2007/01/16 MH Add RX command packet handle here. */
	/* 2007/03/01 MH We have to release RFD and return if rx pkt is cmd pkt. */
	if (rtl819xusb_rx_command_packet(dev, pstats))
		return;

#ifdef SW_CRC_CHECK
	SwCrcCheck();
#endif


}

static void query_rx_cmdpkt_desc_status(struct sk_buff *skb,
					struct ieee80211_rx_stats *stats)
{
	rx_desc_819x_usb *desc = (rx_desc_819x_usb *)skb->data;

	//
	//Get Rx Descriptor Information
	//
	stats->virtual_address = (u8 *)skb->data;
	stats->Length = desc->Length;
	stats->RxDrvInfoSize = 0;
	stats->RxBufShift = 0;
	stats->packetlength = stats->Length-scrclng;
	stats->fraglength = stats->packetlength;
	stats->fragoffset = 0;
	stats->ntotalfrag = 1;
}


static void rtl8192_rx_cmd(struct sk_buff *skb)
{
	struct rtl8192_rx_info *info = (struct rtl8192_rx_info *)skb->cb;
	struct net_device *dev = info->dev;
	/* TODO */
	struct ieee80211_rx_stats stats = {
		.signal = 0,
		.noise = -98,
		.rate = 0,
		.freq = IEEE80211_24GHZ_BAND,
	};

	if ((skb->len >= (20 + sizeof(rx_desc_819x_usb))) && (skb->len < RX_URB_SIZE)) {

		query_rx_cmdpkt_desc_status(skb, &stats);
		// this is to be done by amy 080508     prfd->queue_id = 1;


		//
		//  Process the command packet received.
		//

		rtl819xusb_process_received_packet(dev, &stats);

		dev_kfree_skb_any(skb);
	}
}

void rtl8192_irq_rx_tasklet(struct r8192_priv *priv)
{
	struct sk_buff *skb;
	struct rtl8192_rx_info *info;

	while (NULL != (skb = skb_dequeue(&priv->skb_queue))) {
		info = (struct rtl8192_rx_info *)skb->cb;
		switch (info->out_pipe) {
		/* Nomal packet pipe */
		case 3:
			priv->IrpPendingCount--;
			rtl8192_rx_nomal(skb);
			break;

		/* Command packet pipe */
		case 9:
			RT_TRACE(COMP_RECV, "command in-pipe index(%d)\n",
				 info->out_pipe);

			rtl8192_rx_cmd(skb);
			break;

		default: /* should never get here! */
			RT_TRACE(COMP_ERR, "Unknown in-pipe index(%d)\n",
				 info->out_pipe);
			dev_kfree_skb(skb);
			break;

		}
	}
}

static const struct net_device_ops rtl8192_netdev_ops = {
	.ndo_open               = rtl8192_open,
	.ndo_stop               = rtl8192_close,
	.ndo_get_stats          = rtl8192_stats,
	.ndo_tx_timeout         = tx_timeout,
	.ndo_do_ioctl           = rtl8192_ioctl,
	.ndo_set_rx_mode	= r8192_set_multicast,
	.ndo_set_mac_address    = r8192_set_mac_adr,
	.ndo_validate_addr      = eth_validate_addr,
	.ndo_change_mtu         = eth_change_mtu,
	.ndo_start_xmit         = ieee80211_xmit,
};


/****************************************************************************
     ---------------------------- USB_STUFF---------------------------
*****************************************************************************/

static int rtl8192_usb_probe(struct usb_interface *intf,
			     const struct usb_device_id *id)
{
	struct net_device *dev = NULL;
	struct r8192_priv *priv = NULL;
	struct usb_device *udev = interface_to_usbdev(intf);
	int ret;
	RT_TRACE(COMP_INIT, "Oops: i'm coming\n");

	dev = alloc_ieee80211(sizeof(struct r8192_priv));
	if (dev == NULL)
		return -ENOMEM;

	usb_set_intfdata(intf, dev);
	SET_NETDEV_DEV(dev, &intf->dev);
	priv = ieee80211_priv(dev);
	priv->ieee80211 = netdev_priv(dev);
	priv->udev = udev;

	dev->netdev_ops = &rtl8192_netdev_ops;

	dev->wireless_handlers = (struct iw_handler_def *) &r8192_wx_handlers_def;

	dev->type = ARPHRD_ETHER;

	dev->watchdog_timeo = HZ*3;	//modified by john, 0805

	if (dev_alloc_name(dev, ifname) < 0) {
		RT_TRACE(COMP_INIT, "Oops: devname already taken! Trying wlan%%d...\n");
		ifname = "wlan%d";
		dev_alloc_name(dev, ifname);
	}

	RT_TRACE(COMP_INIT, "Driver probe completed1\n");
	if (rtl8192_init(dev) != 0) {
		RT_TRACE(COMP_ERR, "Initialization failed");
		ret = -ENODEV;
		goto fail;
	}
	netif_carrier_off(dev);
	netif_stop_queue(dev);

	ret = register_netdev(dev);
	if (ret)
		goto fail2;

	RT_TRACE(COMP_INIT, "dev name=======> %s\n", dev->name);
	rtl8192_proc_init_one(dev);


	RT_TRACE(COMP_INIT, "Driver probe completed\n");
	return 0;

fail2:
	rtl8192_down(dev);
	kfree(priv->pFirmware);
	priv->pFirmware = NULL;
	rtl8192_usb_deleteendpoints(dev);
	destroy_workqueue(priv->priv_wq);
	mdelay(10);
fail:
	free_ieee80211(dev);

	RT_TRACE(COMP_ERR, "wlan driver load failed\n");
	return ret;
}

//detach all the work and timer structure declared or inititialize in r8192U_init function.
void rtl8192_cancel_deferred_work(struct r8192_priv *priv)
{

	cancel_work_sync(&priv->reset_wq);
	cancel_delayed_work(&priv->watch_dog_wq);
	cancel_delayed_work(&priv->update_beacon_wq);
	cancel_work_sync(&priv->qos_activate);
}


static void rtl8192_usb_disconnect(struct usb_interface *intf)
{
	struct net_device *dev = usb_get_intfdata(intf);

	struct r8192_priv *priv = ieee80211_priv(dev);
	if (dev) {

		unregister_netdev(dev);

		RT_TRACE(COMP_DOWN, "=============>wlan driver to be removed\n");
		rtl8192_proc_remove_one(dev);

		rtl8192_down(dev);
		kfree(priv->pFirmware);
		priv->pFirmware = NULL;
		rtl8192_usb_deleteendpoints(dev);
		destroy_workqueue(priv->priv_wq);
		mdelay(10);

	}
	free_ieee80211(dev);
	RT_TRACE(COMP_DOWN, "wlan driver removed\n");
}

static int __init rtl8192_usb_module_init(void)
{
	int ret;

#ifdef CONFIG_IEEE80211_DEBUG
	ret = ieee80211_debug_init();
	if (ret) {
		pr_err("ieee80211_debug_init() failed %d\n", ret);
		return ret;
	}
#endif
	ret = ieee80211_crypto_init();
	if (ret) {
		pr_err("ieee80211_crypto_init() failed %d\n", ret);
		return ret;
	}

	ret = ieee80211_crypto_tkip_init();
	if (ret) {
		pr_err("ieee80211_crypto_tkip_init() failed %d\n", ret);
		return ret;
	}

	ret = ieee80211_crypto_ccmp_init();
	if (ret) {
		pr_err("ieee80211_crypto_ccmp_init() failed %d\n", ret);
		return ret;
	}

	ret = ieee80211_crypto_wep_init();
	if (ret) {
		pr_err("ieee80211_crypto_wep_init() failed %d\n", ret);
		return ret;
	}

	pr_info("\nLinux kernel driver for RTL8192 based WLAN cards\n");
	pr_info("Copyright (c) 2007-2008, Realsil Wlan\n");
	RT_TRACE(COMP_INIT, "Initializing module");
	RT_TRACE(COMP_INIT, "Wireless extensions version %d", WIRELESS_EXT);
	rtl8192_proc_module_init();
	return usb_register(&rtl8192_usb_driver);
}


static void __exit rtl8192_usb_module_exit(void)
{
	usb_deregister(&rtl8192_usb_driver);

	RT_TRACE(COMP_DOWN, "Exiting");
}


void rtl8192_try_wake_queue(struct net_device *dev, int pri)
{
	unsigned long flags;
	short enough_desc;
	struct r8192_priv *priv = (struct r8192_priv *)ieee80211_priv(dev);

	spin_lock_irqsave(&priv->tx_lock, flags);
	enough_desc = check_nic_enough_desc(dev, pri);
	spin_unlock_irqrestore(&priv->tx_lock, flags);

	if (enough_desc)
		ieee80211_wake_queue(priv->ieee80211);
}

void EnableHWSecurityConfig8192(struct net_device *dev)
{
	u8 SECR_value = 0x0;
	struct r8192_priv *priv = (struct r8192_priv *)ieee80211_priv(dev);
	struct ieee80211_device *ieee = priv->ieee80211;
	SECR_value = SCR_TxEncEnable | SCR_RxDecEnable;
	if (((KEY_TYPE_WEP40 == ieee->pairwise_key_type) || (KEY_TYPE_WEP104 == ieee->pairwise_key_type)) && (priv->ieee80211->auth_mode != 2)) {
		SECR_value |= SCR_RxUseDK;
		SECR_value |= SCR_TxUseDK;
	} else if ((ieee->iw_mode == IW_MODE_ADHOC) && (ieee->pairwise_key_type & (KEY_TYPE_CCMP | KEY_TYPE_TKIP))) {
		SECR_value |= SCR_RxUseDK;
		SECR_value |= SCR_TxUseDK;
	}
	//add HWSec active enable here.
	//default using hwsec. when peer AP is in N mode only and pairwise_key_type is none_aes(which HT_IOT_ACT_PURE_N_MODE indicates it), use software security. when peer AP is in b,g,n mode mixed and pairwise_key_type is none_aes, use g mode hw security. WB on 2008.7.4

	ieee->hwsec_active = 1;

	if ((ieee->pHTInfo->IOTAction&HT_IOT_ACT_PURE_N_MODE) || !hwwep) { /* add hwsec_support flag to totol control hw_sec on/off */
		ieee->hwsec_active = 0;
		SECR_value &= ~SCR_RxDecEnable;
	}
	RT_TRACE(COMP_SEC, "%s:, hwsec:%d, pairwise_key:%d, SECR_value:%x\n", __func__,
		 ieee->hwsec_active, ieee->pairwise_key_type, SECR_value);
	write_nic_byte(dev, SECR,  SECR_value);
}


void setKey(struct net_device *dev, u8 EntryNo, u8 KeyIndex, u16 KeyType,
	    u8 *MacAddr, u8 DefaultKey, u32 *KeyContent)
{
	u32 TargetCommand = 0;
	u32 TargetContent = 0;
	u16 usConfig = 0;
	u8 i;
	if (EntryNo >= TOTAL_CAM_ENTRY)
		RT_TRACE(COMP_ERR, "cam entry exceeds in setKey()\n");

	RT_TRACE(COMP_SEC, "====>to setKey(), dev:%p, EntryNo:%d, KeyIndex:%d, KeyType:%d, MacAddr%pM\n", dev, EntryNo, KeyIndex, KeyType, MacAddr);

	if (DefaultKey)
		usConfig |= BIT15 | (KeyType<<2);
	else
		usConfig |= BIT15 | (KeyType<<2) | KeyIndex;


	for (i = 0; i < CAM_CONTENT_COUNT; i++) {
		TargetCommand  = i+CAM_CONTENT_COUNT*EntryNo;
		TargetCommand |= BIT31|BIT16;

		if (i == 0) { /* MAC|Config */
			TargetContent = (u32)(*(MacAddr+0)) << 16|
					(u32)(*(MacAddr+1)) << 24|
					(u32)usConfig;

			write_nic_dword(dev, WCAMI, TargetContent);
			write_nic_dword(dev, RWCAM, TargetCommand);
		} else if (i == 1) { /* MAC */
			TargetContent = (u32)(*(MacAddr+2))	 |
					(u32)(*(MacAddr+3)) <<  8|
					(u32)(*(MacAddr+4)) << 16|
					(u32)(*(MacAddr+5)) << 24;
			write_nic_dword(dev, WCAMI, TargetContent);
			write_nic_dword(dev, RWCAM, TargetCommand);
		} else {
			//Key Material
			if (KeyContent != NULL) {
				write_nic_dword(dev, WCAMI, (u32)(*(KeyContent+i-2)));
				write_nic_dword(dev, RWCAM, TargetCommand);
			}
		}
	}

}

/***************************************************************************
     ------------------- module init / exit stubs ----------------
****************************************************************************/
module_init(rtl8192_usb_module_init);
module_exit(rtl8192_usb_module_exit);