/*
 * Copyright (c) 1996, 2003 VIA Networking Technologies, Inc.
 * All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * 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 02110-1301 USA.
 *
 * File: main_usb.c
 *
 * Purpose: driver entry for initial, open, close, tx and rx.
 *
 * Author: Lyndon Chen
 *
 * Date: Dec 8, 2005
 *
 * Functions:
 *
 *   vt6656_probe - module initial (insmod) driver entry
 *   device_remove1 - module remove entry
 *   device_open - allocate dma/descripter resource & initial mac/bbp function
 *   device_xmit - asynchronous data tx function
 *   device_set_multi - set mac filter
 *   device_ioctl - ioctl entry
 *   device_close - shutdown mac/bbp & free dma/descriptor resource
 *   device_alloc_frag_buf - rx fragement pre-allocated function
 *   device_free_tx_bufs - free tx buffer function
 *   device_dma0_tx_80211- tx 802.11 frame via dma0
 *   device_dma0_xmit- tx PS buffered frame via dma0
 *   device_init_registers- initial MAC & BBP & RF internal registers.
 *   device_init_rings- initial tx/rx ring buffer
 *   device_init_defrag_cb- initial & allocate de-fragement buffer.
 *   device_tx_srv- tx interrupt service function
 *
 * Revision History:
 */
#undef __NO_VERSION__

#include <linux/file.h>
#include "device.h"
#include "card.h"
#include "baseband.h"
#include "mac.h"
#include "tether.h"
#include "wmgr.h"
#include "wctl.h"
#include "power.h"
#include "wcmd.h"
#include "iocmd.h"
#include "rxtx.h"
#include "bssdb.h"
#include "wpactl.h"
#include "iwctl.h"
#include "dpc.h"
#include "datarate.h"
#include "rf.h"
#include "firmware.h"
#include "usbpipe.h"
#include "channel.h"
#include "int.h"
#include "iowpa.h"

/* static int msglevel = MSG_LEVEL_DEBUG; */
static int          msglevel                =MSG_LEVEL_INFO;

/*
 * define module options
 */

/* version information */
#define DRIVER_AUTHOR \
	"VIA Networking Technologies, Inc., <lyndonchen@vntek.com.tw>"
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION(DEVICE_FULL_DRV_NAM);

#define DEVICE_PARAM(N,D) \
        static int N[MAX_UINTS]=OPTION_DEFAULT;\
        module_param_array(N, int, NULL, 0);\
        MODULE_PARM_DESC(N, D);

#define RX_DESC_DEF0     64
DEVICE_PARAM(RxDescriptors0,"Number of receive usb desc buffer");

#define TX_DESC_DEF0     64
DEVICE_PARAM(TxDescriptors0,"Number of transmit usb desc buffer");

#define CHANNEL_DEF     6
DEVICE_PARAM(Channel, "Channel number");

/* PreambleType[] is the preamble length used for transmit.
   0: indicate allows long preamble type
   1: indicate allows short preamble type
*/

#define PREAMBLE_TYPE_DEF     1

DEVICE_PARAM(PreambleType, "Preamble Type");

#define RTS_THRESH_DEF     2347
DEVICE_PARAM(RTSThreshold, "RTS threshold");

#define FRAG_THRESH_DEF     2346
DEVICE_PARAM(FragThreshold, "Fragmentation threshold");

#define DATA_RATE_DEF     13
/* datarate[] index
   0: indicate 1 Mbps   0x02
   1: indicate 2 Mbps   0x04
   2: indicate 5.5 Mbps 0x0B
   3: indicate 11 Mbps  0x16
   4: indicate 6 Mbps   0x0c
   5: indicate 9 Mbps   0x12
   6: indicate 12 Mbps  0x18
   7: indicate 18 Mbps  0x24
   8: indicate 24 Mbps  0x30
   9: indicate 36 Mbps  0x48
  10: indicate 48 Mbps  0x60
  11: indicate 54 Mbps  0x6c
  12: indicate 72 Mbps  0x90
  13: indicate auto rate
*/

DEVICE_PARAM(ConnectionRate, "Connection data rate");

#define OP_MODE_DEF     0
DEVICE_PARAM(OPMode, "Infrastruct, adhoc, AP mode ");

/* OpMode[] is used for transmit.
   0: indicate infrastruct mode used
   1: indicate adhoc mode used
   2: indicate AP mode used
*/

/* PSMode[]
   0: indicate disable power saving mode
   1: indicate enable power saving mode
*/

#define PS_MODE_DEF     0
DEVICE_PARAM(PSMode, "Power saving mode");

#define SHORT_RETRY_DEF     8
DEVICE_PARAM(ShortRetryLimit, "Short frame retry limits");

#define LONG_RETRY_DEF     4
DEVICE_PARAM(LongRetryLimit, "long frame retry limits");

/* BasebandType[] baseband type selected
   0: indicate 802.11a type
   1: indicate 802.11b type
   2: indicate 802.11g type
*/

#define BBP_TYPE_DEF     2
DEVICE_PARAM(BasebandType, "baseband type");

/* 80211hEnable[]
   0: indicate disable 802.11h
   1: indicate enable 802.11h
*/

#define X80211h_MODE_DEF     0

DEVICE_PARAM(b80211hEnable, "802.11h mode");

/*
 * Static vars definitions
 */

static struct usb_device_id vt6656_table[] = {
	{USB_DEVICE(VNT_USB_VENDOR_ID, VNT_USB_PRODUCT_ID)},
	{}
};

/* frequency list (map channels to frequencies) */
/*
static const long frequency_list[] = {
    2412, 2417, 2422, 2427, 2432, 2437, 2442, 2447, 2452, 2457, 2462, 2467, 2472, 2484,
    4915, 4920, 4925, 4935, 4940, 4945, 4960, 4980,
    5035, 5040, 5045, 5055, 5060, 5080, 5170, 5180, 5190, 5200, 5210, 5220, 5230, 5240,
    5260, 5280, 5300, 5320, 5500, 5520, 5540, 5560, 5580, 5600, 5620, 5640, 5660, 5680,
    5700, 5745, 5765, 5785, 5805, 5825
	};

static const struct iw_handler_def	iwctl_handler_def;
*/

static int vt6656_probe(struct usb_interface *intf,
			const struct usb_device_id *id);
static void vt6656_disconnect(struct usb_interface *intf);

#ifdef CONFIG_PM	/* Minimal support for suspend and resume */
static int vt6656_suspend(struct usb_interface *intf, pm_message_t message);
static int vt6656_resume(struct usb_interface *intf);
#endif /* CONFIG_PM */

static struct net_device_stats *device_get_stats(struct net_device *dev);
static int  device_open(struct net_device *dev);
static int  device_xmit(struct sk_buff *skb, struct net_device *dev);
static void device_set_multi(struct net_device *dev);
static int  device_close(struct net_device *dev);
static int  device_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);

static int device_init_registers(struct vnt_private *pDevice);
static bool device_init_defrag_cb(struct vnt_private *pDevice);

static int  ethtool_ioctl(struct net_device *dev, struct ifreq *);
static void device_free_tx_bufs(struct vnt_private *pDevice);
static void device_free_rx_bufs(struct vnt_private *pDevice);
static void device_free_int_bufs(struct vnt_private *pDevice);
static void device_free_frag_bufs(struct vnt_private *pDevice);
static bool device_alloc_bufs(struct vnt_private *pDevice);

static int Read_config_file(struct vnt_private *pDevice);
static unsigned char *Config_FileOperation(struct vnt_private *pDevice);
static int Config_FileGetParameter(unsigned char *string,
				   unsigned char *dest,
				   unsigned char *source);

static void usb_device_reset(struct vnt_private *pDevice);

static void
device_set_options(struct vnt_private *pDevice) {

    u8    abyBroadcastAddr[ETH_ALEN] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
    u8    abySNAP_RFC1042[ETH_ALEN] = {0xAA, 0xAA, 0x03, 0x00, 0x00, 0x00};
    u8 abySNAP_Bridgetunnel[ETH_ALEN] = {0xAA, 0xAA, 0x03, 0x00, 0x00, 0xF8};

    memcpy(pDevice->abyBroadcastAddr, abyBroadcastAddr, ETH_ALEN);
    memcpy(pDevice->abySNAP_RFC1042, abySNAP_RFC1042, ETH_ALEN);
    memcpy(pDevice->abySNAP_Bridgetunnel, abySNAP_Bridgetunnel, ETH_ALEN);

    pDevice->cbTD = TX_DESC_DEF0;
    pDevice->cbRD = RX_DESC_DEF0;
    pDevice->uChannel = CHANNEL_DEF;
    pDevice->wRTSThreshold = RTS_THRESH_DEF;
    pDevice->wFragmentationThreshold = FRAG_THRESH_DEF;
    pDevice->byShortRetryLimit = SHORT_RETRY_DEF;
    pDevice->byLongRetryLimit = LONG_RETRY_DEF;
    pDevice->wMaxTransmitMSDULifetime = DEFAULT_MSDU_LIFETIME;
    pDevice->byShortPreamble = PREAMBLE_TYPE_DEF;
    pDevice->ePSMode = PS_MODE_DEF;
    pDevice->b11hEnable = X80211h_MODE_DEF;
    pDevice->op_mode = NL80211_IFTYPE_UNSPECIFIED;
    pDevice->uConnectionRate = DATA_RATE_DEF;
    if (pDevice->uConnectionRate < RATE_AUTO) pDevice->bFixRate = true;
    pDevice->byBBType = BBP_TYPE_DEF;
    pDevice->byPacketType = pDevice->byBBType;
    pDevice->byAutoFBCtrl = AUTO_FB_0;
    pDevice->byPreambleType = 0;
    pDevice->bExistSWNetAddr = false;
}

/*
 * initialization of MAC & BBP registers
 */
static int device_init_registers(struct vnt_private *pDevice)
{
	struct vnt_manager *pMgmt = &pDevice->vnt_mgmt;
	struct vnt_cmd_card_init *init_cmd = &pDevice->init_command;
	struct vnt_rsp_card_init *init_rsp = &pDevice->init_response;
	u8 abyBroadcastAddr[ETH_ALEN] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
	u8 abySNAP_RFC1042[ETH_ALEN] = {0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00};
	u8 abySNAP_Bridgetunnel[ETH_ALEN]
		= {0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8};
	u8 byAntenna;
	int ii;
	int ntStatus = STATUS_SUCCESS;
	u8 byTmp;
	u8 byCalibTXIQ = 0, byCalibTXDC = 0, byCalibRXIQ = 0;

	DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO "---->INIbInitAdapter. [%d][%d]\n",
				DEVICE_INIT_COLD, pDevice->byPacketType);

	memcpy(pDevice->abyBroadcastAddr, abyBroadcastAddr, ETH_ALEN);
	memcpy(pDevice->abySNAP_RFC1042, abySNAP_RFC1042, ETH_ALEN);
	memcpy(pDevice->abySNAP_Bridgetunnel, abySNAP_Bridgetunnel, ETH_ALEN);

	if (!FIRMWAREbCheckVersion(pDevice)) {
		if (FIRMWAREbDownload(pDevice) == true) {
			if (FIRMWAREbBrach2Sram(pDevice) == false) {
				DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO
					" FIRMWAREbBrach2Sram fail\n");
				return false;
			}
		} else {
			DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO
				" FIRMWAREbDownload fail\n");
			return false;
		}
	}

	if (!BBbVT3184Init(pDevice)) {
		DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO" BBbVT3184Init fail\n");
		return false;
	}

	init_cmd->init_class = DEVICE_INIT_COLD;
	init_cmd->exist_sw_net_addr = (u8) pDevice->bExistSWNetAddr;
	for (ii = 0; ii < 6; ii++)
		init_cmd->sw_net_addr[ii] = pDevice->abyCurrentNetAddr[ii];
	init_cmd->short_retry_limit = pDevice->byShortRetryLimit;
	init_cmd->long_retry_limit = pDevice->byLongRetryLimit;

	/* issue card_init command to device */
	ntStatus = vnt_control_out(pDevice,
		MESSAGE_TYPE_CARDINIT, 0, 0,
		sizeof(struct vnt_cmd_card_init), (u8 *)init_cmd);
	if (ntStatus != STATUS_SUCCESS) {
		DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO" Issue Card init fail\n");
		return false;
	}

	ntStatus = vnt_control_in(pDevice, MESSAGE_TYPE_INIT_RSP, 0, 0,
		sizeof(struct vnt_rsp_card_init), (u8 *)init_rsp);
	if (ntStatus != STATUS_SUCCESS) {
		DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO
			"Cardinit request in status fail!\n");
		return false;
	}

	/* local ID for AES functions */
	ntStatus = vnt_control_in(pDevice, MESSAGE_TYPE_READ,
		MAC_REG_LOCALID, MESSAGE_REQUEST_MACREG, 1,
			&pDevice->byLocalID);
	if (ntStatus != STATUS_SUCCESS)
		return false;

	/* do MACbSoftwareReset in MACvInitialize */

	pDevice->bProtectMode = false;
	/* only used in 11g type, sync with ERP IE */
	pDevice->bNonERPPresent = false;
	pDevice->bBarkerPreambleMd = false;
	if (pDevice->bFixRate) {
		pDevice->wCurrentRate = (u16)pDevice->uConnectionRate;
	} else {
		if (pDevice->byBBType == BB_TYPE_11B)
			pDevice->wCurrentRate = RATE_11M;
		else
			pDevice->wCurrentRate = RATE_54M;
	}

	CHvInitChannelTable(pDevice);

	pDevice->byTopOFDMBasicRate = RATE_24M;
	pDevice->byTopCCKBasicRate = RATE_1M;

	/* target to IF pin while programming to RF chip */
	pDevice->byCurPwr = 0xFF;

	pDevice->byCCKPwr = pDevice->abyEEPROM[EEP_OFS_PWR_CCK];
	pDevice->byOFDMPwrG = pDevice->abyEEPROM[EEP_OFS_PWR_OFDMG];
	/* load power table */
	for (ii = 0; ii < 14; ii++) {
		pDevice->abyCCKPwrTbl[ii] =
			pDevice->abyEEPROM[ii + EEP_OFS_CCK_PWR_TBL];

		if (pDevice->abyCCKPwrTbl[ii] == 0)
			pDevice->abyCCKPwrTbl[ii] = pDevice->byCCKPwr;
		pDevice->abyOFDMPwrTbl[ii] =
				pDevice->abyEEPROM[ii + EEP_OFS_OFDM_PWR_TBL];
		if (pDevice->abyOFDMPwrTbl[ii] == 0)
			pDevice->abyOFDMPwrTbl[ii] = pDevice->byOFDMPwrG;
	}

	/*
	 * original zonetype is USA, but custom zonetype is Europe,
	 * then need to recover 12, 13, 14 channels with 11 channel
	 */
	if (((pDevice->abyEEPROM[EEP_OFS_ZONETYPE] == ZoneType_Japan) ||
		(pDevice->abyEEPROM[EEP_OFS_ZONETYPE] == ZoneType_Europe)) &&
		(pDevice->byOriginalZonetype == ZoneType_USA)) {
		for (ii = 11; ii < 14; ii++) {
			pDevice->abyCCKPwrTbl[ii] = pDevice->abyCCKPwrTbl[10];
			pDevice->abyOFDMPwrTbl[ii] = pDevice->abyOFDMPwrTbl[10];
		}
	}

	pDevice->byOFDMPwrA = 0x34; /* same as RFbMA2829SelectChannel */

	/* load OFDM A power table */
	for (ii = 0; ii < CB_MAX_CHANNEL_5G; ii++) {
		pDevice->abyOFDMAPwrTbl[ii] =
			pDevice->abyEEPROM[ii + EEP_OFS_OFDMA_PWR_TBL];

		if (pDevice->abyOFDMAPwrTbl[ii] == 0)
			pDevice->abyOFDMAPwrTbl[ii] = pDevice->byOFDMPwrA;
	}

	byAntenna = pDevice->abyEEPROM[EEP_OFS_ANTENNA];

	if (byAntenna & EEP_ANTINV)
		pDevice->bTxRxAntInv = true;
	else
		pDevice->bTxRxAntInv = false;

	byAntenna &= (EEP_ANTENNA_AUX | EEP_ANTENNA_MAIN);

	if (byAntenna == 0) /* if not set default is both */
		byAntenna = (EEP_ANTENNA_AUX | EEP_ANTENNA_MAIN);

	if (byAntenna == (EEP_ANTENNA_AUX | EEP_ANTENNA_MAIN)) {
		pDevice->byAntennaCount = 2;
		pDevice->byTxAntennaMode = ANT_B;
		pDevice->dwTxAntennaSel = 1;
		pDevice->dwRxAntennaSel = 1;

		if (pDevice->bTxRxAntInv == true)
			pDevice->byRxAntennaMode = ANT_A;
		else
			pDevice->byRxAntennaMode = ANT_B;
	} else  {
		pDevice->byAntennaCount = 1;
		pDevice->dwTxAntennaSel = 0;
		pDevice->dwRxAntennaSel = 0;

		if (byAntenna & EEP_ANTENNA_AUX) {
			pDevice->byTxAntennaMode = ANT_A;

			if (pDevice->bTxRxAntInv == true)
				pDevice->byRxAntennaMode = ANT_B;
			else
				pDevice->byRxAntennaMode = ANT_A;
		} else {
			pDevice->byTxAntennaMode = ANT_B;

		if (pDevice->bTxRxAntInv == true)
			pDevice->byRxAntennaMode = ANT_A;
		else
			pDevice->byRxAntennaMode = ANT_B;
		}
	}

	/* get Auto Fall Back type */
	pDevice->byAutoFBCtrl = AUTO_FB_0;

	/* default Auto Mode */
	/* pDevice->NetworkType = Ndis802_11Automode; */
	pDevice->eConfigPHYMode = PHY_TYPE_AUTO;
	pDevice->byBBType = BB_TYPE_11G;

	/* get channel range */
	pDevice->byMinChannel = 1;
	pDevice->byMaxChannel = CB_MAX_CHANNEL;

	/* get RFType */
	pDevice->byRFType = init_rsp->rf_type;

	/* load vt3266 calibration parameters in EEPROM */
	if (pDevice->byRFType == RF_VT3226D0) {
		if ((pDevice->abyEEPROM[EEP_OFS_MAJOR_VER] == 0x1) &&
			(pDevice->abyEEPROM[EEP_OFS_MINOR_VER] >= 0x4)) {

			byCalibTXIQ = pDevice->abyEEPROM[EEP_OFS_CALIB_TX_IQ];
			byCalibTXDC = pDevice->abyEEPROM[EEP_OFS_CALIB_TX_DC];
			byCalibRXIQ = pDevice->abyEEPROM[EEP_OFS_CALIB_RX_IQ];
			if (byCalibTXIQ || byCalibTXDC || byCalibRXIQ) {
			/* CR255, enable TX/RX IQ and DC compensation mode */
				vnt_control_out_u8(pDevice,
					MESSAGE_REQUEST_BBREG,
					0xff,
					0x03);
			/* CR251, TX I/Q Imbalance Calibration */
				vnt_control_out_u8(pDevice,
					MESSAGE_REQUEST_BBREG,
					0xfb,
					byCalibTXIQ);
			/* CR252, TX DC-Offset Calibration */
				vnt_control_out_u8(pDevice,
					MESSAGE_REQUEST_BBREG,
					0xfC,
					byCalibTXDC);
			/* CR253, RX I/Q Imbalance Calibration */
				vnt_control_out_u8(pDevice,
					MESSAGE_REQUEST_BBREG,
					0xfd,
					byCalibRXIQ);
			} else {
			/* CR255, turn off BB Calibration compensation */
				vnt_control_out_u8(pDevice,
					MESSAGE_REQUEST_BBREG,
					0xff,
					0x0);
			}
		}
	}

	pMgmt->eScanType = WMAC_SCAN_PASSIVE;
	pMgmt->uCurrChannel = pDevice->uChannel;
	pMgmt->uIBSSChannel = pDevice->uChannel;
	CARDbSetMediaChannel(pDevice, pMgmt->uCurrChannel);

	/* get permanent network address */
	memcpy(pDevice->abyPermanentNetAddr, init_rsp->net_addr, 6);
	memcpy(pDevice->abyCurrentNetAddr,
				pDevice->abyPermanentNetAddr, ETH_ALEN);

	/* if exist SW network address, use it */
	DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"Network address = %pM\n",
		pDevice->abyCurrentNetAddr);

	/*
	* set BB and packet type at the same time
	* set Short Slot Time, xIFS, and RSPINF
	*/
	if (pDevice->byBBType == BB_TYPE_11A) {
		CARDbAddBasicRate(pDevice, RATE_6M);
		pDevice->bShortSlotTime = true;
	} else {
		CARDbAddBasicRate(pDevice, RATE_1M);
		pDevice->bShortSlotTime = false;
	}

	BBvSetShortSlotTime(pDevice);
	CARDvSetBSSMode(pDevice);

	pDevice->byBBVGACurrent = pDevice->abyBBVGA[0];
	pDevice->byBBVGANew = pDevice->byBBVGACurrent;

	BBvSetVGAGainOffset(pDevice, pDevice->abyBBVGA[0]);

	pDevice->byRadioCtl = pDevice->abyEEPROM[EEP_OFS_RADIOCTL];
	pDevice->bHWRadioOff = false;

	if ((pDevice->byRadioCtl & EEP_RADIOCTL_ENABLE) != 0) {
		ntStatus = vnt_control_in(pDevice, MESSAGE_TYPE_READ,
			MAC_REG_GPIOCTL1, MESSAGE_REQUEST_MACREG, 1, &byTmp);

		if (ntStatus != STATUS_SUCCESS)
			return false;

		if ((byTmp & GPIO3_DATA) == 0) {
			pDevice->bHWRadioOff = true;
			MACvRegBitsOn(pDevice, MAC_REG_GPIOCTL1, GPIO3_INTMD);
		} else {
			MACvRegBitsOff(pDevice, MAC_REG_GPIOCTL1, GPIO3_INTMD);
			pDevice->bHWRadioOff = false;
		}

	}

	vnt_mac_set_led(pDevice, LEDSTS_TMLEN, 0x38);

	vnt_mac_set_led(pDevice, LEDSTS_STS, LEDSTS_SLOW);

	MACvRegBitsOn(pDevice, MAC_REG_GPIOCTL0, 0x01);

	if ((pDevice->bHWRadioOff == true) ||
				(pDevice->bRadioControlOff == true)) {
		CARDbRadioPowerOff(pDevice);
	} else {
		CARDbRadioPowerOn(pDevice);
	}

	DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"<----INIbInitAdapter Exit\n");

	return true;
}

#ifdef CONFIG_PM	/* Minimal support for suspend and resume */

static int vt6656_suspend(struct usb_interface *intf, pm_message_t message)
{
	struct vnt_private *device = usb_get_intfdata(intf);

	if (!device || !device->dev)
		return -ENODEV;

	if (device->flags & DEVICE_FLAGS_OPENED)
		device_close(device->dev);

	return 0;
}

static int vt6656_resume(struct usb_interface *intf)
{
	struct vnt_private *device = usb_get_intfdata(intf);

	if (!device || !device->dev)
		return -ENODEV;

	if (!(device->flags & DEVICE_FLAGS_OPENED))
		device_open(device->dev);

	return 0;
}

#endif /* CONFIG_PM */

static const struct net_device_ops device_netdev_ops = {
    .ndo_open               = device_open,
    .ndo_stop               = device_close,
    .ndo_do_ioctl           = device_ioctl,
    .ndo_get_stats          = device_get_stats,
    .ndo_start_xmit         = device_xmit,
    .ndo_set_rx_mode	    = device_set_multi,
};

static int
vt6656_probe(struct usb_interface *intf, const struct usb_device_id *id)
{
	u8 fake_mac[ETH_ALEN] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x01};
	struct usb_device *udev = interface_to_usbdev(intf);
	int rc = 0;
	struct net_device *netdev = NULL;
	struct vnt_private *pDevice;

	printk(KERN_NOTICE "%s Ver. %s\n", DEVICE_FULL_DRV_NAM, DEVICE_VERSION);
	printk(KERN_NOTICE "Copyright (c) 2004 VIA Networking Technologies, Inc.\n");

	udev = usb_get_dev(udev);
	netdev = alloc_etherdev(sizeof(struct vnt_private));
	if (!netdev) {
		printk(KERN_ERR DEVICE_NAME ": allocate net device failed\n");
		rc = -ENOMEM;
		goto err_nomem;
	}

	pDevice = netdev_priv(netdev);
	memset(pDevice, 0, sizeof(struct vnt_private));

	pDevice->dev = netdev;
	pDevice->usb = udev;

	device_set_options(pDevice);
	spin_lock_init(&pDevice->lock);
	mutex_init(&pDevice->usb_lock);

	INIT_DELAYED_WORK(&pDevice->run_command_work, vRunCommand);
	INIT_DELAYED_WORK(&pDevice->second_callback_work, BSSvSecondCallBack);
	INIT_WORK(&pDevice->read_work_item, RXvWorkItem);
	INIT_WORK(&pDevice->rx_mng_work_item, RXvMngWorkItem);

	pDevice->vnt_mgmt.pAdapter = (void *) pDevice;

	netdev->netdev_ops = &device_netdev_ops;
	netdev->wireless_handlers =
		(struct iw_handler_def *) &iwctl_handler_def;

	usb_set_intfdata(intf, pDevice);
	SET_NETDEV_DEV(netdev, &intf->dev);
	memcpy(pDevice->dev->dev_addr, fake_mac, ETH_ALEN);

	usb_device_reset(pDevice);

	rc = register_netdev(netdev);
	if (rc) {
		printk(KERN_ERR DEVICE_NAME " Failed to register netdev\n");
		goto err_netdev;
	}

	return 0;

err_netdev:
	free_netdev(netdev);
err_nomem:
	usb_put_dev(udev);

	return rc;
}

static void device_free_tx_bufs(struct vnt_private *priv)
{
	struct vnt_usb_send_context *tx_context;
	int ii;

	for (ii = 0; ii < priv->cbTD; ii++) {
		tx_context = priv->apTD[ii];
		/* deallocate URBs */
		if (tx_context->urb) {
			usb_kill_urb(tx_context->urb);
			usb_free_urb(tx_context->urb);
		}

		kfree(tx_context);
	}

	return;
}

static void device_free_rx_bufs(struct vnt_private *priv)
{
	struct vnt_rcb *rcb;
	int ii;

	for (ii = 0; ii < priv->cbRD; ii++) {
		rcb = priv->apRCB[ii];

		/* deallocate URBs */
		if (rcb->pUrb) {
			usb_kill_urb(rcb->pUrb);
			usb_free_urb(rcb->pUrb);
		}

		/* deallocate skb */
		if (rcb->skb)
			dev_kfree_skb(rcb->skb);
	}

	kfree(priv->pRCBMem);

	return;
}

static void usb_device_reset(struct vnt_private *pDevice)
{
 int status;
 status = usb_reset_device(pDevice->usb);
	if (status)
            printk("usb_device_reset fail status=%d\n",status);
	return ;
}

static void device_free_int_bufs(struct vnt_private *priv)
{
	kfree(priv->int_buf.data_buf);

	return;
}

static bool device_alloc_bufs(struct vnt_private *priv)
{
	struct vnt_usb_send_context *tx_context;
	struct vnt_rcb *rcb;
	int ii;

	for (ii = 0; ii < priv->cbTD; ii++) {
		tx_context = kmalloc(sizeof(struct vnt_usb_send_context),
								GFP_KERNEL);
		if (tx_context == NULL) {
			DBG_PRT(MSG_LEVEL_ERR, KERN_ERR
				"%s : allocate tx usb context failed\n",
					priv->dev->name);
			goto free_tx;
		}

		priv->apTD[ii] = tx_context;
		tx_context->priv = priv;

		/* allocate URBs */
		tx_context->urb = usb_alloc_urb(0, GFP_ATOMIC);
		if (!tx_context->urb) {
			DBG_PRT(MSG_LEVEL_ERR,
				KERN_ERR "alloc tx urb failed\n");
			goto free_tx;
		}

		tx_context->in_use = false;
	}

	/* allocate RCB mem */
	priv->pRCBMem = kzalloc((sizeof(struct vnt_rcb) * priv->cbRD),
								GFP_KERNEL);
	if (priv->pRCBMem == NULL) {
		DBG_PRT(MSG_LEVEL_ERR, KERN_ERR
			"%s : alloc rx usb context failed\n",
				priv->dev->name);
		goto free_tx;
	}

	priv->FirstRecvFreeList = NULL;
	priv->LastRecvFreeList = NULL;
	priv->FirstRecvMngList = NULL;
	priv->LastRecvMngList = NULL;
	priv->NumRecvFreeList = 0;

	rcb = (struct vnt_rcb *)priv->pRCBMem;

	for (ii = 0; ii < priv->cbRD; ii++) {
		priv->apRCB[ii] = rcb;
		rcb->pDevice = priv;

		/* allocate URBs */
		rcb->pUrb = usb_alloc_urb(0, GFP_ATOMIC);
		if (rcb->pUrb == NULL) {
			DBG_PRT(MSG_LEVEL_ERR, KERN_ERR
				" Failed to alloc rx urb\n");
			goto free_rx_tx;
		}

		rcb->skb = netdev_alloc_skb(priv->dev, priv->rx_buf_sz);
		if (rcb->skb == NULL) {
			DBG_PRT(MSG_LEVEL_ERR, KERN_ERR
						" Failed to alloc rx skb\n");
			goto free_rx_tx;
		}

		rcb->bBoolInUse = false;

		EnqueueRCB(priv->FirstRecvFreeList,
						priv->LastRecvFreeList, rcb);

		priv->NumRecvFreeList++;
		rcb++;
	}

	priv->pInterruptURB = usb_alloc_urb(0, GFP_ATOMIC);
	if (priv->pInterruptURB == NULL) {
		DBG_PRT(MSG_LEVEL_ERR, KERN_ERR"Failed to alloc int urb\n");
		goto free_rx_tx;
	}

	priv->int_buf.data_buf = kmalloc(MAX_INTERRUPT_SIZE, GFP_KERNEL);
	if (priv->int_buf.data_buf == NULL) {
		DBG_PRT(MSG_LEVEL_ERR, KERN_ERR"Failed to alloc int buf\n");
		usb_free_urb(priv->pInterruptURB);
		goto free_rx_tx;
	}

	return true;

free_rx_tx:
	device_free_rx_bufs(priv);

free_tx:
	device_free_tx_bufs(priv);

	return false;
}

static bool device_init_defrag_cb(struct vnt_private *pDevice)
{
	int i;
	PSDeFragControlBlock pDeF;

    /* Init the fragment ctl entries */
    for (i = 0; i < CB_MAX_RX_FRAG; i++) {
        pDeF = &(pDevice->sRxDFCB[i]);
        if (!device_alloc_frag_buf(pDevice, pDeF)) {
            DBG_PRT(MSG_LEVEL_ERR,KERN_ERR "%s: can not alloc frag bufs\n",
                pDevice->dev->name);
            goto free_frag;
        }
    }
    pDevice->cbDFCB = CB_MAX_RX_FRAG;
    pDevice->cbFreeDFCB = pDevice->cbDFCB;
    return true;

free_frag:
    device_free_frag_bufs(pDevice);
    return false;
}

static void device_free_frag_bufs(struct vnt_private *pDevice)
{
	PSDeFragControlBlock pDeF;
	int i;

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

        pDeF = &(pDevice->sRxDFCB[i]);

        if (pDeF->skb)
            dev_kfree_skb(pDeF->skb);
    }
}

int device_alloc_frag_buf(struct vnt_private *pDevice,
		PSDeFragControlBlock pDeF)
{
	pDeF->skb = netdev_alloc_skb(pDevice->dev, pDevice->rx_buf_sz);
	if (!pDeF->skb)
		return false;

	return true;
}

static int  device_open(struct net_device *dev)
{
	struct vnt_private *pDevice = netdev_priv(dev);

     pDevice->fWPA_Authened = false;

    DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO " device_open...\n");

    pDevice->rx_buf_sz = MAX_TOTAL_SIZE_WITH_ALL_HEADERS;

    if (device_alloc_bufs(pDevice) == false) {
        DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO " device_alloc_bufs fail... \n");
        return -ENOMEM;
    }

    if (device_init_defrag_cb(pDevice)== false) {
        DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO " Initial defragment cb fail \n");
        goto free_rx_tx;
    }

    MP_CLEAR_FLAG(pDevice, fMP_DISCONNECTED);
    MP_SET_FLAG(pDevice, fMP_POST_READS);
    MP_SET_FLAG(pDevice, fMP_POST_WRITES);

    /* read config file */
    Read_config_file(pDevice);

	if (device_init_registers(pDevice) == false) {
		DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO " init register fail\n");
		goto free_all;
	}

    /* init for key management */
    KeyvInitTable(pDevice,&pDevice->sKey);
	memcpy(pDevice->vnt_mgmt.abyMACAddr,
		pDevice->abyCurrentNetAddr, ETH_ALEN);
    memcpy(pDevice->dev->dev_addr, pDevice->abyCurrentNetAddr, ETH_ALEN);
    pDevice->bStopTx0Pkt = false;
    pDevice->bStopDataPkt = false;
    pDevice->bRoaming = false;
    pDevice->bIsRoaming = false;
    pDevice->bEnableRoaming = false;

    vMgrObjectInit(pDevice);

	schedule_delayed_work(&pDevice->second_callback_work, HZ);

	pDevice->int_interval = 1;  /* bInterval is set to 1 */
    pDevice->eEncryptionStatus = Ndis802_11EncryptionDisabled;

    pDevice->bIsRxWorkItemQueued = true;

   pDevice->bWPADEVUp = false;
     pDevice->bwextstep0 = false;
     pDevice->bwextstep1 = false;
     pDevice->bwextstep2 = false;
     pDevice->bwextstep3 = false;
     pDevice->bWPASuppWextEnabled = false;
    pDevice->byReAssocCount = 0;

	schedule_work(&pDevice->read_work_item);
    INTvWorkItem(pDevice);

    /* if WEP key already set by iwconfig but device not yet open */
    if ((pDevice->bEncryptionEnable == true) && (pDevice->bTransmitKey == true)) {
         KeybSetDefaultKey( pDevice,
                            &(pDevice->sKey),
                            pDevice->byKeyIndex | (1 << 31),
                            pDevice->uKeyLength,
                            NULL,
                            pDevice->abyKey,
                            KEY_CTL_WEP
                          );

         pDevice->eEncryptionStatus = Ndis802_11Encryption1Enabled;
    }

	if (pDevice->vnt_mgmt.eConfigMode == WMAC_CONFIG_AP)
		bScheduleCommand((void *) pDevice, WLAN_CMD_RUN_AP, NULL);
	else
		bScheduleCommand((void *) pDevice, WLAN_CMD_BSSID_SCAN, NULL);

    netif_stop_queue(pDevice->dev);
    pDevice->flags |= DEVICE_FLAGS_OPENED;

	DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO "device_open success..\n");
	return 0;

free_all:
    device_free_frag_bufs(pDevice);
free_rx_tx:
    device_free_rx_bufs(pDevice);
    device_free_tx_bufs(pDevice);
    device_free_int_bufs(pDevice);
	usb_kill_urb(pDevice->pInterruptURB);
    usb_free_urb(pDevice->pInterruptURB);

    DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO "device_open fail.. \n");
    return -ENOMEM;
}

static int device_close(struct net_device *dev)
{
	struct vnt_private *pDevice = netdev_priv(dev);
	struct vnt_manager *pMgmt = &pDevice->vnt_mgmt;
	u8 uu;

	DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO "device_close1\n");
    if (pDevice == NULL)
        return -ENODEV;

    if (pDevice->bLinkPass) {
	bScheduleCommand((void *) pDevice, WLAN_CMD_DISASSOCIATE, NULL);
        mdelay(30);
    }

        memset(pMgmt->abyDesireSSID, 0, WLAN_IEHDR_LEN + WLAN_SSID_MAXLEN + 1);
        pMgmt->bShareKeyAlgorithm = false;
        pDevice->bEncryptionEnable = false;
        pDevice->eEncryptionStatus = Ndis802_11EncryptionDisabled;

	for (uu = 0; uu < MAX_KEY_TABLE; uu++)
                MACvDisableKeyEntry(pDevice,uu);

    if ((pDevice->flags & DEVICE_FLAGS_UNPLUG) == false) {
        MACbShutdown(pDevice);
    }
    netif_stop_queue(pDevice->dev);
    MP_SET_FLAG(pDevice, fMP_DISCONNECTED);
    MP_CLEAR_FLAG(pDevice, fMP_POST_WRITES);
    MP_CLEAR_FLAG(pDevice, fMP_POST_READS);

	cancel_delayed_work_sync(&pDevice->run_command_work);
	cancel_delayed_work_sync(&pDevice->second_callback_work);

	cancel_work_sync(&pDevice->rx_mng_work_item);
	cancel_work_sync(&pDevice->read_work_item);

   pDevice->bRoaming = false;
   pDevice->bIsRoaming = false;
   pDevice->bEnableRoaming = false;
    pDevice->bCmdRunning = false;
    pDevice->bLinkPass = false;
    memset(pMgmt->abyCurrBSSID, 0, 6);
    pMgmt->eCurrState = WMAC_STATE_IDLE;

	pDevice->flags &= ~DEVICE_FLAGS_OPENED;

    device_free_tx_bufs(pDevice);
    device_free_rx_bufs(pDevice);
    device_free_int_bufs(pDevice);
    device_free_frag_bufs(pDevice);

	usb_kill_urb(pDevice->pInterruptURB);
    usb_free_urb(pDevice->pInterruptURB);

    BSSvClearNodeDBTable(pDevice, 0);

    DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO "device_close2 \n");

    return 0;
}

static void vt6656_disconnect(struct usb_interface *intf)
{
	struct vnt_private *device = usb_get_intfdata(intf);

	if (!device)
		return;

	usb_set_intfdata(intf, NULL);
	usb_put_dev(interface_to_usbdev(intf));

	device->flags |= DEVICE_FLAGS_UNPLUG;

	if (device->dev) {
		unregister_netdev(device->dev);
		free_netdev(device->dev);
	}
}

static int device_xmit(struct sk_buff *skb, struct net_device *dev)
{
	struct vnt_private *pDevice = netdev_priv(dev);
	struct net_device_stats *stats = &pDevice->stats;
	unsigned long flags;

	spin_lock_irqsave(&pDevice->lock, flags);

	netif_stop_queue(dev);

	if (!pDevice->bLinkPass) {
		dev_kfree_skb_irq(skb);
		goto out;
	}

	if (pDevice->bStopDataPkt) {
		dev_kfree_skb_irq(skb);
		stats->tx_dropped++;
		goto out;
	}

	if (nsDMA_tx_packet(pDevice, skb)) {
		if (netif_queue_stopped(dev))
			netif_wake_queue(dev);
	}

out:
	spin_unlock_irqrestore(&pDevice->lock, flags);

	return NETDEV_TX_OK;
}

/* find out the start position of str2 from str1 */
static unsigned char *kstrstr(const unsigned char *str1,
			      const unsigned char *str2) {
  int str1_len = strlen(str1);
  int str2_len = strlen(str2);

  while (str1_len >= str2_len) {
       str1_len--;
      if(memcmp(str1,str2,str2_len)==0)
	return (unsigned char *) str1;
        str1++;
  }
  return NULL;
}

static int Config_FileGetParameter(unsigned char *string,
				   unsigned char *dest,
				   unsigned char *source)
{
  unsigned char buf1[100];
  unsigned char buf2[100];
  unsigned char *start_p = NULL, *end_p = NULL, *tmp_p = NULL;
  int ii;

    memset(buf1,0,100);
    strcat(buf1, string);
    strcat(buf1, "=");
    source+=strlen(buf1);

    /* find target string start point */
    start_p = kstrstr(source,buf1);
    if (start_p == NULL)
	return false;

    /* check if current config line is marked by "#" */
    for (ii = 1; ; ii++) {
	if (memcmp(start_p - ii, "\n", 1) == 0)
		break;
	if (memcmp(start_p - ii, "#", 1) == 0)
		return false;
    }

    /* find target string end point */
     end_p = kstrstr(start_p,"\n");
     if (end_p == NULL) {       /* can't find "\n", but don't care */
	     end_p = start_p + strlen(start_p);   /* no include "\n" */
     }

   memset(buf2,0,100);
   memcpy(buf2, start_p, end_p-start_p); /* get the target line */
   buf2[end_p-start_p]='\0';

   /* find value */
   start_p = kstrstr(buf2,"=");
   if (start_p == NULL)
      return false;
   memset(buf1,0,100);
   strcpy(buf1,start_p+1);

   /* except space */
  tmp_p = buf1;
  while(*tmp_p != 0x00) {
  	if(*tmp_p==' ')
	    tmp_p++;
         else
	  break;
  }

   memcpy(dest,tmp_p,strlen(tmp_p));
 return true;
}

/* if read fails, return NULL, or return data pointer */
static unsigned char *Config_FileOperation(struct vnt_private *pDevice)
{
	unsigned char *buffer = kmalloc(1024, GFP_KERNEL);
	struct file   *file;

	if (!buffer) {
		printk("allocate mem for file fail?\n");
		return NULL;
	}

	file = filp_open(CONFIG_PATH, O_RDONLY, 0);
	if (IS_ERR(file)) {
		kfree(buffer);
		printk("Config_FileOperation file Not exist\n");
		return NULL;
	}

	if (kernel_read(file, 0, buffer, 1024) < 0) {
		printk("read file error?\n");
		kfree(buffer);
		buffer = NULL;
	}

	fput(file);
	return buffer;
}

/* return --->-1:fail; >=0:successful */
static int Read_config_file(struct vnt_private *pDevice)
{
	int result = 0;
	unsigned char tmpbuffer[100];
	unsigned char *buffer = NULL;

	/* init config setting */
 pDevice->config_file.ZoneType = -1;
 pDevice->config_file.eAuthenMode = -1;
 pDevice->config_file.eEncryptionStatus = -1;

  buffer = Config_FileOperation(pDevice);
  if (buffer == NULL) {
     result =-1;
     return result;
  }

/* get zonetype */
{
    memset(tmpbuffer,0,sizeof(tmpbuffer));
    if(Config_FileGetParameter("ZONETYPE",tmpbuffer,buffer) ==true) {
    if(memcmp(tmpbuffer,"USA",3)==0) {
      pDevice->config_file.ZoneType=ZoneType_USA;
    }
    else if(memcmp(tmpbuffer,"JAPAN",5)==0) {
      pDevice->config_file.ZoneType=ZoneType_Japan;
    }
    else if(memcmp(tmpbuffer,"EUROPE",6)==0) {
     pDevice->config_file.ZoneType=ZoneType_Europe;
    }
    else {
      printk("Unknown Zonetype[%s]?\n",tmpbuffer);
   }
 }
}

/* get other parameter */
  {
	memset(tmpbuffer,0,sizeof(tmpbuffer));
       if(Config_FileGetParameter("AUTHENMODE",tmpbuffer,buffer)==true) {
	 pDevice->config_file.eAuthenMode = (int) simple_strtol(tmpbuffer, NULL, 10);
       }

	memset(tmpbuffer,0,sizeof(tmpbuffer));
       if(Config_FileGetParameter("ENCRYPTIONMODE",tmpbuffer,buffer)==true) {
	 pDevice->config_file.eEncryptionStatus= (int) simple_strtol(tmpbuffer, NULL, 10);
       }
  }

  kfree(buffer);
  return result;
}

static void device_set_multi(struct net_device *dev)
{
	struct vnt_private *priv = netdev_priv(dev);
	unsigned long flags;

	if (priv->flags & DEVICE_FLAGS_OPENED) {
		spin_lock_irqsave(&priv->lock, flags);

		bScheduleCommand(priv, WLAN_CMD_CONFIGURE_FILTER, NULL);

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

void vnt_configure_filter(struct vnt_private *priv)
{
	struct net_device *dev = priv->dev;
	struct vnt_manager *mgmt = &priv->vnt_mgmt;
	struct netdev_hw_addr *ha;
	u64 mc_filter = 0;
	u8 tmp = 0;
	int rc;

	rc = vnt_control_in(priv, MESSAGE_TYPE_READ,
		MAC_REG_RCR, MESSAGE_REQUEST_MACREG, 1, &tmp);
	if (rc == 0)
		priv->byRxMode = tmp;

	DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO "priv->byRxMode in= %x\n",
							priv->byRxMode);

	if (dev->flags & IFF_PROMISC) { /* set promiscuous mode */
		DBG_PRT(MSG_LEVEL_ERR, KERN_NOTICE
			"%s: Promiscuous mode enabled.\n", dev->name);
		/* unconditionally log net taps */
		priv->byRxMode |= (RCR_MULTICAST|RCR_BROADCAST|RCR_UNICAST);
	} else if ((netdev_mc_count(dev) > priv->multicast_limit) ||
			(dev->flags & IFF_ALLMULTI)) {
		mc_filter = ~0x0;
		MACvWriteMultiAddr(priv, mc_filter);

		priv->byRxMode |= (RCR_MULTICAST|RCR_BROADCAST);
	} else {
		netdev_for_each_mc_addr(ha, dev) {
			int bit_nr = ether_crc(ETH_ALEN, ha->addr) >> 26;

			mc_filter |= 1ULL << (bit_nr & 0x3f);
		}

		MACvWriteMultiAddr(priv, mc_filter);

		priv->byRxMode &= ~(RCR_UNICAST);
		priv->byRxMode |= (RCR_MULTICAST|RCR_BROADCAST);
	}

	if (mgmt->eConfigMode == WMAC_CONFIG_AP) {
		/*
		 * If AP mode, don't enable RCR_UNICAST since HW only compares
		 * addr1 with local MAC
		 */
		priv->byRxMode |= (RCR_MULTICAST|RCR_BROADCAST);
		priv->byRxMode &= ~(RCR_UNICAST);
	}

	vnt_control_out_u8(priv, MESSAGE_REQUEST_MACREG,
					MAC_REG_RCR, priv->byRxMode);

	DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO
				"priv->byRxMode out= %x\n", priv->byRxMode);
}

static struct net_device_stats *device_get_stats(struct net_device *dev)
{
	struct vnt_private *pDevice = netdev_priv(dev);

	return &pDevice->stats;
}

static int device_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
{
	int rc = 0;

	switch (cmd) {
	case SIOCETHTOOL:
		return ethtool_ioctl(dev, rq);

	}

	return rc;
}

static int ethtool_ioctl(struct net_device *dev, struct ifreq *rq)
{
	u32 ethcmd;

	if (copy_from_user(&ethcmd, rq->ifr_data, sizeof(ethcmd)))
		return -EFAULT;

        switch (ethcmd) {
	case ETHTOOL_GDRVINFO: {
		struct ethtool_drvinfo info = {ETHTOOL_GDRVINFO};
		strncpy(info.driver, DEVICE_NAME, sizeof(info.driver)-1);
		strncpy(info.version, DEVICE_VERSION, sizeof(info.version)-1);
		if (copy_to_user(rq->ifr_data, &info, sizeof(info)))
			return -EFAULT;
		return 0;
	}

        }

	return -EOPNOTSUPP;
}

MODULE_DEVICE_TABLE(usb, vt6656_table);

static struct usb_driver vt6656_driver = {
	.name =		DEVICE_NAME,
	.probe =	vt6656_probe,
	.disconnect =	vt6656_disconnect,
	.id_table =	vt6656_table,
#ifdef CONFIG_PM
	.suspend = vt6656_suspend,
	.resume = vt6656_resume,
#endif /* CONFIG_PM */
};

module_usb_driver(vt6656_driver);