immortalwrt/package/jsda/rtl8192du/hal/usb_ops_linux.c

/******************************************************************************
 *
 * Copyright(c) 2007 - 2011 Realtek Corporation. All rights reserved.
 *
 * 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
 *
 *
 ******************************************************************************/
#define _HCI_OPS_OS_C_

#include <drv_conf.h>
#include <osdep_service.h>
#include <drv_types.h>
#include <osdep_intf.h>
#include <usb_ops.h>
#include <circ_buf.h>
#include <recv_osdep.h>
#include <rtl8192d_hal.h>

static int usbctrl_vendorreq(struct intf_hdl *pintfhdl, u8 request, u16 value, u16 index, void *pdata, u16 len, u8 requesttype)
{
	_adapter *padapter = pintfhdl->padapter ;
	struct dvobj_priv  *pdvobjpriv = adapter_to_dvobj(padapter);
	struct usb_device *udev = pdvobjpriv->pusbdev;

	unsigned int pipe;
	int status = 0;
	u32 tmp_buflen=0;
	u8 reqtype;
	u8 *pIo_buf;
	int vendorreq_times = 0;

	#ifdef CONFIG_USB_VENDOR_REQ_BUFFER_DYNAMIC_ALLOCATE
	u8 *tmp_buf;
	#else // use stack memory
	u8 tmp_buf[MAX_USB_IO_CTL_SIZE];
	#endif

#ifdef CONFIG_CONCURRENT_MODE
	if(padapter->adapter_type > PRIMARY_ADAPTER)
	{
		padapter = padapter->pbuddy_adapter;
		pdvobjpriv = adapter_to_dvobj(padapter);
		udev = pdvobjpriv->pusbdev;
	}
#endif


	//DBG_871X("%s %s:%d\n",__FUNCTION__, current->comm, current->pid);

	if((padapter->bSurpriseRemoved) ||(padapter->pwrctrlpriv.pnp_bstop_trx)){
		RT_TRACE(_module_hci_ops_os_c_,_drv_err_,("usbctrl_vendorreq:(padapter->bSurpriseRemoved ||adapter->pwrctrlpriv.pnp_bstop_trx)!!!\n"));
		status = -EPERM;
		goto exit;
	}

	if(len>MAX_VENDOR_REQ_CMD_SIZE){
		DBG_8192C( "[%s] Buffer len error ,vendor request failed\n", __FUNCTION__ );
		status = -EINVAL;
		goto exit;
	}

	#ifdef CONFIG_USB_VENDOR_REQ_MUTEX
	_enter_critical_mutex(&pdvobjpriv->usb_vendor_req_mutex, NULL);
	#endif


	// Acquire IO memory for vendorreq
#ifdef CONFIG_USB_VENDOR_REQ_BUFFER_PREALLOC
	pIo_buf = pdvobjpriv->usb_vendor_req_buf;
#else
	#ifdef CONFIG_USB_VENDOR_REQ_BUFFER_DYNAMIC_ALLOCATE
	tmp_buf = rtw_malloc( (u32) len + ALIGNMENT_UNIT);
	tmp_buflen =  (u32)len + ALIGNMENT_UNIT;
	#else // use stack memory
	tmp_buflen = MAX_USB_IO_CTL_SIZE;
	#endif

	// Added by Albert 2010/02/09
	// For mstar platform, mstar suggests the address for USB IO should be 16 bytes alignment.
	// Trying to fix it here.
	pIo_buf = (tmp_buf==NULL)?NULL:tmp_buf + ALIGNMENT_UNIT -((SIZE_PTR)(tmp_buf) & 0x0f );
#endif

	if ( pIo_buf== NULL) {
		DBG_8192C( "[%s] pIo_buf == NULL \n", __FUNCTION__ );
		status = -ENOMEM;
		goto release_mutex;
	}

	while(++vendorreq_times<= MAX_USBCTRL_VENDORREQ_TIMES)
	{
		_rtw_memset(pIo_buf, 0, len);

		if (requesttype == 0x01)
		{
			pipe = usb_rcvctrlpipe(udev, 0);//read_in
			reqtype =  REALTEK_USB_VENQT_READ;
		}
		else
		{
			pipe = usb_sndctrlpipe(udev, 0);//write_out
			reqtype =  REALTEK_USB_VENQT_WRITE;
			_rtw_memcpy( pIo_buf, pdata, len);
		}

		#if 0
		//timeout test for firmware downloading
		status = rtw_usb_control_msg(udev, pipe, request, reqtype, value, index, pIo_buf, len
			, (value == FW_8192D_START_ADDRESS) ?RTW_USB_CONTROL_MSG_TIMEOUT_TEST : RTW_USB_CONTROL_MSG_TIMEOUT
		);
		#else
		status = rtw_usb_control_msg(udev, pipe, request, reqtype, value, index, pIo_buf, len, RTW_USB_CONTROL_MSG_TIMEOUT);
		#endif

		if ( status == len)   // Success this control transfer.
		{
			rtw_reset_continual_urb_error(pdvobjpriv);
			if ( requesttype == 0x01 )
			{   // For Control read transfer, we have to copy the read data from pIo_buf to pdata.
				_rtw_memcpy( pdata, pIo_buf,  len );
			}
		}
		else { // error cases
			DBG_8192C("reg 0x%x, usb %s %u fail, status:%d value=0x%x, vendorreq_times:%d\n"
				, value,(requesttype == 0x01)?"read":"write" , len, status, *(u32*)pdata, vendorreq_times);

			if (status < 0) {
				if(status == (-ESHUTDOWN)	|| status == -ENODEV	)
				{
					padapter->bSurpriseRemoved = _TRUE;
				} else {
					#ifdef DBG_CONFIG_ERROR_DETECT
					{
						HAL_DATA_TYPE	*pHalData = GET_HAL_DATA(padapter);
						pHalData->srestpriv.Wifi_Error_Status = USB_VEN_REQ_CMD_FAIL;
					}
					#endif
				}
			}
			else // status != len && status >= 0
			{
				if(status > 0) {
					if ( requesttype == 0x01 )
					{   // For Control read transfer, we have to copy the read data from pIo_buf to pdata.
						_rtw_memcpy( pdata, pIo_buf,  len );
					}
				}
			}

			if(rtw_inc_and_chk_continual_urb_error(pdvobjpriv) == _TRUE ){
				padapter->bSurpriseRemoved = _TRUE;
				break;
			}

		}

		// firmware download is checksumed, don't retry
		if( (value >= FW_8192D_START_ADDRESS && value <= FW_8192D_END_ADDRESS) || status == len )
			break;

	}

	// release IO memory used by vendorreq
	#ifdef CONFIG_USB_VENDOR_REQ_BUFFER_DYNAMIC_ALLOCATE
	rtw_mfree(tmp_buf, tmp_buflen);
	#endif

release_mutex:
	#ifdef CONFIG_USB_VENDOR_REQ_MUTEX
	_exit_critical_mutex(&pdvobjpriv->usb_vendor_req_mutex, NULL);
	#endif
exit:
	return status;

}

static void usb_read_reg_rf_byfw(struct intf_hdl *pintfhdl, u16 byteCount, u32 registerIndex, PVOID buffer)
{
	u16	wPage = 0x0000, offset;
	u32	BufferLengthRead;
	PADAPTER	Adapter = pintfhdl->padapter;
	HAL_DATA_TYPE	*pHalData = GET_HAL_DATA(Adapter);
	u8	RFPath=0,nPHY=0;

	RFPath =(u8) ((registerIndex&0xff0000)>>16);

	if (pHalData->interfaceIndex!=0)
	{
		nPHY = 1; //MAC1
		if(registerIndex&MAC1_ACCESS_PHY0)// MAC1 need to access PHY0
			nPHY = 0;
	}
	else
	{
		if(registerIndex&MAC0_ACCESS_PHY1)
			nPHY = 1;
	}
	registerIndex &= 0xFF;
	wPage = ((nPHY<<7)|(RFPath<<5)|8)<<8;
	offset = (u16)registerIndex;

	//
	// IN a vendor request to read back MAC register.
	//
	usbctrl_vendorreq(pintfhdl, 0x05, offset, wPage, buffer, byteCount, 0x01);

}

static void usb_read_reg(struct intf_hdl *pintfhdl, u16 value, void *pdata, u16 len)
{
	_adapter		*padapter = pintfhdl->padapter;
	HAL_DATA_TYPE	*pHalData = GET_HAL_DATA(padapter);
	u8	request;
	u8	requesttype;
	u16	index;

	request = 0x05;
	requesttype = 0x01;//read_in
	index = 0;//n/a

	if (pHalData->interfaceIndex!=0)
	{
		if(value<0x1000)
			value|=0x4000;
		else if ((value&MAC1_ACCESS_PHY0) && !(value&0x8000))
			value &= 0xFFF;
	}

	usbctrl_vendorreq(pintfhdl, request, value, index, pdata, len, requesttype);
}

static int usb_write_reg(struct intf_hdl *pintfhdl, u16 value, void *pdata, u16 len)
{
	_adapter		*padapter = pintfhdl->padapter;
	HAL_DATA_TYPE	*pHalData = GET_HAL_DATA(padapter);
	u8	request;
	u8	requesttype;
	u16	index;

	request = 0x05;
	requesttype = 0x00;//write_out
	index = 0;//n/a

	if (pHalData->interfaceIndex!=0)
	{
		if(value<0x1000)
			value|=0x4000;
		else if((value&MAC1_ACCESS_PHY0) && !(value&0x8000))// MAC1 need to access PHY0
			value &= 0xFFF;
	}

	return usbctrl_vendorreq(pintfhdl, request, value, index, pdata, len, requesttype);
}

static u8 usb_read8(struct intf_hdl *pintfhdl, u32 addr)
{
	u16 wvalue;
	u16 len;
	u32 data=0;

	_func_enter_;

	wvalue = (u16)(addr&0x0000ffff);
	len = 1;

	usb_read_reg(pintfhdl, wvalue, &data, len);

	_func_exit_;

	return (u8)(le32_to_cpu(data)&0x0ff);

}

static u16 usb_read16(struct intf_hdl *pintfhdl, u32 addr)
{
	u16 wvalue;
	u16 len;
	u32 data=0;

	_func_enter_;

	wvalue = (u16)(addr&0x0000ffff);
	len = 2;

	usb_read_reg(pintfhdl, wvalue, &data, len);

	_func_exit_;

	return (u16)(le32_to_cpu(data)&0xffff);

}

static u32 usb_read32(struct intf_hdl *pintfhdl, u32 addr)
{
	u16 wvalue;
	u16 len;
	u32 data=0;

	_func_enter_;

	wvalue = (u16)(addr&0x0000ffff);
	len = 4;

	if((addr&0xff000000)>>24 == 0x66){
		usb_read_reg_rf_byfw(pintfhdl, len, addr, &data);
	}
	else {
		usb_read_reg(pintfhdl, wvalue, &data, len);
	}

	_func_exit_;

	return le32_to_cpu(data);

}

static int usb_write8(struct intf_hdl *pintfhdl, u32 addr, u8 val)
{
	u16 wvalue;
	u16 len;
	u32 data;
	int ret;

	_func_enter_;

	wvalue = (u16)(addr&0x0000ffff);
	len = 1;

	data = val;
	data = cpu_to_le32(data&0x000000ff);

	ret = usb_write_reg(pintfhdl, wvalue, &data, len);

	_func_exit_;

	return ret;
}

static int usb_write16(struct intf_hdl *pintfhdl, u32 addr, u16 val)
{
	u16 wvalue;
	u16 len;
	u32 data;
	int ret;

	_func_enter_;

	wvalue = (u16)(addr&0x0000ffff);
	len = 2;

	data = val;
	data = cpu_to_le32(data&0x0000ffff);

	ret = usb_write_reg(pintfhdl, wvalue, &data, len);

	_func_exit_;

	return ret;

}

static int usb_write32(struct intf_hdl *pintfhdl, u32 addr, u32 val)
{
	u16 wvalue;
	u16 len;
	u32 data;
	int ret;

	_func_enter_;

	wvalue = (u16)(addr&0x0000ffff);
	len = 4;
	data = cpu_to_le32(val);

	ret = usb_write_reg(pintfhdl, wvalue, &data, len);

	_func_exit_;

	return ret;

}

static int usb_writeN(struct intf_hdl *pintfhdl, u32 addr, u32 length, u8 *pdata)
{
	u16	wvalue;
	u16	len;
	u8	buf[VENDOR_CMD_MAX_DATA_LEN]={0};
	int	ret;

	_func_enter_;

	wvalue = (u16)(addr&0x0000ffff);
	len = length;
	 _rtw_memcpy(buf, pdata, len );

	ret = usb_write_reg(pintfhdl, wvalue, buf, len);

	_func_exit_;

	return ret;

}

#ifdef CONFIG_USB_INTERRUPT_IN_PIPE
static void usb_read_interrupt_complete(struct urb *purb, struct pt_regs *regs)
{
	int	err;
	_adapter		*padapter = (_adapter	 *)purb->context;

	padapter->recvpriv.int_cnt ++;
	if(purb->status==0)//SUCCESS
	{
		if (purb->actual_length > sizeof(INTERRUPT_MSG_FORMAT_EX))
		{
			DBG_8192C("usb_read_interrupt_complete: purb->actual_length > sizeof(INTERRUPT_MSG_FORMAT_EX) \n");
		}

		err = usb_submit_urb(purb, GFP_ATOMIC);
		if((err) && (err != (-EPERM)))
		{
			DBG_8192C("cannot submit interrupt in-token(err = 0x%08x),urb_status = %d\n",err, purb->status);
		}
	}
	else
	{
		DBG_8192C("###=> usb_read_interrupt_complete => urb status(%d)\n", purb->status);

		switch(purb->status) {
			case -EINVAL:
			case -EPIPE:
			case -ENODEV:
			case -ESHUTDOWN:
				//padapter->bSurpriseRemoved=_TRUE;
				RT_TRACE(_module_hci_ops_os_c_,_drv_err_,("usb_read_port_complete:bSurpriseRemoved=TRUE\n"));
			case -ENOENT:
				padapter->bDriverStopped=_TRUE;
				RT_TRACE(_module_hci_ops_os_c_,_drv_err_,("usb_read_port_complete:bDriverStopped=TRUE\n"));
				break;
			case -EPROTO:
				break;
			case -EINPROGRESS:
				DBG_8192C("ERROR: URB IS IN PROGRESS!/n");
				break;
			default:
				break;
		}
	}

}

static u32 usb_read_interrupt(struct intf_hdl *pintfhdl, u32 addr)
{
	int	err, pipe;
	u32	ret = _SUCCESS;
	_adapter			*adapter = pintfhdl->padapter;
	struct dvobj_priv	*pdvobj = adapter_to_dvobj(adapter);
	struct recv_priv	*precvpriv = &adapter->recvpriv;
	struct usb_device	*pusbd = pdvobj->pusbdev;

_func_enter_;

	//translate DMA FIFO addr to pipehandle
	pipe = ffaddr2pipehdl(pdvobj, addr);

	usb_fill_int_urb(precvpriv->int_in_urb, pusbd, pipe,
					precvpriv->int_in_buf,
					sizeof(INTERRUPT_MSG_FORMAT_EX),
					usb_read_interrupt_complete,
					adapter,
					3);

	err = usb_submit_urb(precvpriv->int_in_urb, GFP_ATOMIC);
	if((err) && (err != (-EPERM)))
	{
		DBG_8192C("cannot submit interrupt in-token(err = 0x%08x),urb_status = %d\n",err, precvpriv->int_in_urb->status);
		ret = _FAIL;
	}

_func_exit_;

	return ret;
}
#endif

static s32 pre_recv_entry(union recv_frame *precvframe, struct recv_stat *prxstat, struct phy_stat *pphy_info)
{
	s32 ret=_SUCCESS;
#ifdef CONFIG_CONCURRENT_MODE
	u8 *primary_myid, *secondary_myid, *paddr1;
	union recv_frame	*precvframe_if2 = NULL;
	_adapter *primary_padapter = precvframe->u.hdr.adapter;
	_adapter *secondary_padapter = primary_padapter->pbuddy_adapter;
	struct recv_priv *precvpriv = &primary_padapter->recvpriv;
	_queue *pfree_recv_queue = &precvpriv->free_recv_queue;
	u8	*pbuf = precvframe->u.hdr.rx_data;

	if(!secondary_padapter)
		return ret;

	paddr1 = GetAddr1Ptr(precvframe->u.hdr.rx_data);

	if(IS_MCAST(paddr1) == _FALSE)//unicast packets
	{
		//primary_myid = myid(&primary_padapter->eeprompriv);
		secondary_myid = myid(&secondary_padapter->eeprompriv);

		if(_rtw_memcmp(paddr1, secondary_myid, ETH_ALEN))
		{
			//change to secondary interface
			precvframe->u.hdr.adapter = secondary_padapter;
		}

		//ret = recv_entry(precvframe);

	}
	else // Handle BC/MC Packets
	{

		u8 clone = _TRUE;
#if 0
		u8 type, subtype, *paddr2, *paddr3;

		type =  GetFrameType(pbuf);
		subtype = GetFrameSubType(pbuf); //bit(7)~bit(2)

		switch (type)
		{
			case WIFI_MGT_TYPE: //Handle BC/MC mgnt Packets
				if(subtype == WIFI_BEACON)
				{
					paddr3 = GetAddr3Ptr(precvframe->u.hdr.rx_data);

					if (check_fwstate(&secondary_padapter->mlmepriv, _FW_LINKED) &&
						_rtw_memcmp(paddr3, get_bssid(&secondary_padapter->mlmepriv), ETH_ALEN))
					{
						//change to secondary interface
						precvframe->u.hdr.adapter = secondary_padapter;
						clone = _FALSE;
					}

					if(check_fwstate(&primary_padapter->mlmepriv, _FW_LINKED) &&
						_rtw_memcmp(paddr3, get_bssid(&primary_padapter->mlmepriv), ETH_ALEN))
					{
						if(clone==_FALSE)
						{
							clone = _TRUE;
						}
						else
						{
							clone = _FALSE;
						}

						precvframe->u.hdr.adapter = primary_padapter;
					}

					if(check_fwstate(&primary_padapter->mlmepriv, _FW_UNDER_SURVEY|_FW_UNDER_LINKING) ||
						check_fwstate(&secondary_padapter->mlmepriv, _FW_UNDER_SURVEY|_FW_UNDER_LINKING))
					{
						clone = _TRUE;
						precvframe->u.hdr.adapter = primary_padapter;
					}

				}
				else if(subtype == WIFI_PROBEREQ)
				{
					//probe req frame is only for interface2
					//change to secondary interface
					precvframe->u.hdr.adapter = secondary_padapter;
					clone = _FALSE;
				}
				break;
			case WIFI_CTRL_TYPE: // Handle BC/MC ctrl Packets

				break;
			case WIFI_DATA_TYPE: //Handle BC/MC data Packets
					//Notes: AP MODE never rx BC/MC data packets

				paddr2 = GetAddr2Ptr(precvframe->u.hdr.rx_data);

				if(_rtw_memcmp(paddr2, get_bssid(&secondary_padapter->mlmepriv), ETH_ALEN))
				{
					//change to secondary interface
					precvframe->u.hdr.adapter = secondary_padapter;
					clone = _FALSE;
				}

				break;
			default:

				break;
		}
#endif

		if(_TRUE == clone)
		{
			//clone/copy to if2
			u8 shift_sz = 0;
			u32 alloc_sz, skb_len;
			_pkt	 *pkt_copy = NULL;
			struct rx_pkt_attrib *pattrib = NULL;

			precvframe_if2 = rtw_alloc_recvframe(pfree_recv_queue);
			if(precvframe_if2)
			{
				precvframe_if2->u.hdr.adapter = secondary_padapter;

				_rtw_init_listhead(&precvframe_if2->u.hdr.list);
				precvframe_if2->u.hdr.precvbuf = NULL;	//can't access the precvbuf for new arch.
				precvframe_if2->u.hdr.len=0;

				_rtw_memcpy(&precvframe_if2->u.hdr.attrib, &precvframe->u.hdr.attrib, sizeof(struct rx_pkt_attrib));

				pattrib = &precvframe_if2->u.hdr.attrib;

				//	Modified by Albert 20101213
				//	For 8 bytes IP header alignment.
				if (pattrib->qos)	//	Qos data, wireless lan header length is 26
				{
					shift_sz = 6;
				}
				else
				{
					shift_sz = 0;
				}

				skb_len = pattrib->pkt_len;

				// for first fragment packet, driver need allocate 1536+drvinfo_sz+RXDESC_SIZE to defrag packet.
				// modify alloc_sz for recvive crc error packet by thomas 2011-06-02
				if((pattrib->mfrag == 1)&&(pattrib->frag_num == 0)){
					//alloc_sz = 1664;	//1664 is 128 alignment.
					if(skb_len <= 1650)
						alloc_sz = 1664;
					else
						alloc_sz = skb_len + 14;
				}
				else {
					alloc_sz = skb_len;
					//	6 is for IP header 8 bytes alignment in QoS packet case.
					//	8 is for skb->data 4 bytes alignment.
					alloc_sz += 14;
				}

				pkt_copy = rtw_skb_alloc(alloc_sz);

				if(pkt_copy)
				{
					pkt_copy->dev = secondary_padapter->pnetdev;
					precvframe_if2->u.hdr.pkt = pkt_copy;
					precvframe_if2->u.hdr.rx_head = pkt_copy->data;
					precvframe_if2->u.hdr.rx_end = pkt_copy->data + alloc_sz;
					skb_reserve( pkt_copy, 8 - ((SIZE_PTR)( pkt_copy->data ) & 7 ));//force pkt_copy->data at 8-byte alignment address
					skb_reserve( pkt_copy, shift_sz );//force ip_hdr at 8-byte alignment address according to shift_sz.
					_rtw_memcpy(pkt_copy->data, pbuf, skb_len);
					precvframe_if2->u.hdr.rx_data = precvframe_if2->u.hdr.rx_tail = pkt_copy->data;
				}

				recvframe_put(precvframe_if2, skb_len);
				//recvframe_pull(precvframe_if2, drvinfo_sz + RXDESC_SIZE);

				rtl8192d_translate_rx_signal_stuff(precvframe_if2, pphy_info);

				ret = rtw_recv_entry(precvframe_if2);

			}

		}

	}

	rtl8192d_translate_rx_signal_stuff(precvframe, pphy_info);

	ret = rtw_recv_entry(precvframe);

#endif

	return ret;

}

#ifdef CONFIG_USE_USB_BUFFER_ALLOC_RX
static int recvbuf2recvframe(_adapter *padapter, struct recv_buf *precvbuf)
{
	u8	*pbuf;
	u8	shift_sz = 0;
	u16	pkt_cnt;
	u32	pkt_offset, skb_len, alloc_sz;
	int	transfer_len;
	struct recv_stat	*prxstat;
	struct phy_stat	*pphy_info = NULL;
	_pkt				*pkt_copy = NULL;
	union recv_frame	*precvframe = NULL;
	struct rx_pkt_attrib	*pattrib = NULL;
	HAL_DATA_TYPE		*pHalData = GET_HAL_DATA(padapter);
	struct recv_priv	*precvpriv = &padapter->recvpriv;
	_queue			*pfree_recv_queue = &precvpriv->free_recv_queue;


	transfer_len = (s32)precvbuf->transfer_len;
	pbuf = precvbuf->pbuf;

	prxstat = (struct recv_stat *)pbuf;
	pkt_cnt = (le32_to_cpu(prxstat->rxdw2)>>16) & 0xff;

#if 0 //temp remove when disable usb rx aggregation
	if((pkt_cnt > 10) || (pkt_cnt < 1) || (transfer_len<RXDESC_SIZE) ||(pkt_len<=0))
	{
		return _FAIL;
	}
#endif

	do{
		RT_TRACE(_module_rtl871x_recv_c_, _drv_info_,
			 ("recvbuf2recvframe: rxdesc=offsset 0:0x%08x, 4:0x%08x, 8:0x%08x, C:0x%08x\n",
			  prxstat->rxdw0, prxstat->rxdw1, prxstat->rxdw2, prxstat->rxdw4));

		prxstat = (struct recv_stat *)pbuf;

		precvframe = rtw_alloc_recvframe(pfree_recv_queue);
		if(precvframe==NULL)
		{
			RT_TRACE(_module_rtl871x_recv_c_,_drv_err_,("recvbuf2recvframe: precvframe==NULL\n"));
			DBG_8192C("%s()-%d: rtw_alloc_recvframe() failed! RX Drop!\n", __FUNCTION__, __LINE__);
			goto _exit_recvbuf2recvframe;
		}

		_rtw_init_listhead(&precvframe->u.hdr.list);
		precvframe->u.hdr.precvbuf = NULL;	//can't access the precvbuf for new arch.
		precvframe->u.hdr.len=0;

		rtl8192d_query_rx_desc_status(precvframe, prxstat);

		pattrib = &precvframe->u.hdr.attrib;
		if(pattrib->physt)
		{
			pphy_info = (struct phy_stat *)(pbuf + RXDESC_OFFSET);
		}

		pkt_offset = RXDESC_SIZE + pattrib->drvinfo_sz + pattrib->shift_sz + pattrib->pkt_len;

		if((pattrib->pkt_len<=0) || (pkt_offset>transfer_len))
		{
			RT_TRACE(_module_rtl871x_recv_c_,_drv_info_,("recvbuf2recvframe: pkt_len<=0\n"));
			DBG_8192C("%s()-%d: RX Warning!\n", __FUNCTION__, __LINE__);
			rtw_free_recvframe(precvframe, pfree_recv_queue);
			goto _exit_recvbuf2recvframe;
		}

		//	Modified by Albert 20101213
		//	For 8 bytes IP header alignment.
		if (pattrib->qos)	//	Qos data, wireless lan header length is 26
		{
			shift_sz = 6;
		}
		else
		{
			shift_sz = 0;
		}

		skb_len = pattrib->pkt_len;

		// for first fragment packet, driver need allocate 1536+drvinfo_sz+RXDESC_SIZE to defrag packet.
		// modify alloc_sz for recvive crc error packet by thomas 2011-06-02
		if((pattrib->mfrag == 1)&&(pattrib->frag_num == 0)){
			//alloc_sz = 1664;	//1664 is 128 alignment.
			if(skb_len <= 1650)
				alloc_sz = 1664;
			else
				alloc_sz = skb_len + 14;
		}
		else {
			alloc_sz = skb_len;
			//	6 is for IP header 8 bytes alignment in QoS packet case.
			//	8 is for skb->data 4 bytes alignment.
			alloc_sz += 14;
		}

		pkt_copy = rtw_skb_alloc(alloc_sz);

		if(pkt_copy)
		{
			precvframe->u.hdr.pkt = pkt_copy;
			precvframe->u.hdr.rx_head = pkt_copy->data;
			precvframe->u.hdr.rx_end = pkt_copy->data + alloc_sz;
			skb_reserve( pkt_copy, 8 - ((SIZE_PTR)( pkt_copy->data ) & 7 ));//force pkt_copy->data at 8-byte alignment address
			skb_reserve( pkt_copy, shift_sz );//force ip_hdr at 8-byte alignment address according to shift_sz.
			_rtw_memcpy(pkt_copy->data, (pbuf + pattrib->shift_sz + pattrib->drvinfo_sz + RXDESC_SIZE), skb_len);
			precvframe->u.hdr.rx_data = precvframe->u.hdr.rx_tail = pkt_copy->data;
		}
		else
		{
			DBG_8192C("recvbuf2recvframe:can not allocate memory for skb copy\n");
			//precvframe->u.hdr.pkt = rtw_skb_clone(pskb);
			//precvframe->u.hdr.rx_head = precvframe->u.hdr.rx_data = precvframe->u.hdr.rx_tail = pbuf;
			//precvframe->u.hdr.rx_end = pbuf + (pkt_offset>1612?pkt_offset:1612);

			precvframe->u.hdr.pkt = NULL;
			rtw_free_recvframe(precvframe, pfree_recv_queue);

			goto _exit_recvbuf2recvframe;
		}

		recvframe_put(precvframe, skb_len);
		//recvframe_pull(precvframe, drvinfo_sz + RXDESC_SIZE);

#ifdef CONFIG_USB_RX_AGGREGATION
		switch(pHalData->UsbRxAggMode)
		{
			case USB_RX_AGG_DMA:
			case USB_RX_AGG_DMA_USB:
				pkt_offset = (u16)_RND128(pkt_offset);
				break;
				case USB_RX_AGG_USB:
				pkt_offset = (u16)_RND4(pkt_offset);
				break;
			case USB_RX_AGG_DISABLE:
			default:
				break;
		}
#endif

#ifdef CONFIG_CONCURRENT_MODE
		if(rtw_buddy_adapter_up(padapter))
		{
			if(pre_recv_entry(precvframe, prxstat, pphy_info) != _SUCCESS)
			{
				RT_TRACE(_module_rtl871x_recv_c_,_drv_err_,("recvbuf2recvframe: recv_entry(precvframe) != _SUCCESS\n"));
			}
		}
		else
		{
			rtl8192d_translate_rx_signal_stuff(precvframe, pphy_info);
			if(rtw_recv_entry(precvframe) != _SUCCESS)
			{
				RT_TRACE(_module_rtl871x_recv_c_,_drv_err_,("recvbuf2recvframe: rtw_recv_entry(precvframe) != _SUCCESS\n"));
			}
		}
#else
		rtl8192d_translate_rx_signal_stuff(precvframe, pphy_info);
		if(rtw_recv_entry(precvframe) != _SUCCESS)
		{
			RT_TRACE(_module_rtl871x_recv_c_,_drv_err_,("recvbuf2recvframe: rtw_recv_entry(precvframe) != _SUCCESS\n"));
		}
#endif //CONFIG_CONCURRENT_MODE

		pkt_cnt--;

		transfer_len -= pkt_offset;
		pbuf += pkt_offset;
		precvframe = NULL;
		pkt_copy = NULL;

		if(transfer_len>0 && pkt_cnt==0)
			pkt_cnt = (le32_to_cpu(prxstat->rxdw2)>>16) & 0xff;

	}while((transfer_len>0) && (pkt_cnt>0));

_exit_recvbuf2recvframe:

	return _SUCCESS;
}


void rtl8192du_recv_tasklet(void *priv)
{
	struct recv_buf *precvbuf = NULL;
	_adapter	*padapter = (_adapter*)priv;
	struct recv_priv	*precvpriv = &padapter->recvpriv;

	while (NULL != (precvbuf = rtw_dequeue_recvbuf(&precvpriv->recv_buf_pending_queue)))
	{
		if ((padapter->bDriverStopped == _TRUE)||(padapter->bSurpriseRemoved== _TRUE))
		{
			DBG_8192C("recv_tasklet => bDriverStopped or bSurpriseRemoved \n");

			break;
		}


		recvbuf2recvframe(padapter, precvbuf);

		rtw_read_port(padapter, precvpriv->ff_hwaddr, 0, (unsigned char *)precvbuf);
	}

}

static void usb_read_port_complete(struct urb *purb, struct pt_regs *regs)
{
	struct recv_buf	*precvbuf = (struct recv_buf *)purb->context;
	_adapter			*padapter =(_adapter *)precvbuf->adapter;
	struct recv_priv	*precvpriv = &padapter->recvpriv;

	RT_TRACE(_module_hci_ops_os_c_,_drv_err_,("usb_read_port_complete!!!\n"));

	precvpriv->rx_pending_cnt --;

	if(padapter->bSurpriseRemoved || padapter->bDriverStopped||padapter->bReadPortCancel)
	{
		RT_TRACE(_module_hci_ops_os_c_,_drv_err_,("usb_read_port_complete:bDriverStopped(%d) OR bSurpriseRemoved(%d)\n", padapter->bDriverStopped, padapter->bSurpriseRemoved));

		goto exit;
	}

	if(purb->status==0)//SUCCESS
	{
		if ((purb->actual_length > MAX_RECVBUF_SZ) || (purb->actual_length < RXDESC_SIZE))
		{
			RT_TRACE(_module_hci_ops_os_c_,_drv_err_,("usb_read_port_complete: (purb->actual_length > MAX_RECVBUF_SZ) || (purb->actual_length < RXDESC_SIZE)\n"));

			rtw_read_port(padapter, precvpriv->ff_hwaddr, 0, (unsigned char *)precvbuf);
		}
		else
		{
			precvbuf->transfer_len = purb->actual_length;

			//rtw_enqueue_rx_transfer_buffer(precvpriv, rx_transfer_buf);
			rtw_enqueue_recvbuf(precvbuf, &precvpriv->recv_buf_pending_queue);

			tasklet_schedule(&precvpriv->recv_tasklet);
		}
	}
	else
	{
		RT_TRACE(_module_hci_ops_os_c_,_drv_err_,("usb_read_port_complete : purb->status(%d) != 0 \n", purb->status));

		DBG_8192C("###=> usb_read_port_complete => urb status(%d)\n", purb->status);

		switch(purb->status) {
			case -EINVAL:
			case -EPIPE:
			case -ENODEV:
			case -ESHUTDOWN:
				//padapter->bSurpriseRemoved=_TRUE;
				RT_TRACE(_module_hci_ops_os_c_,_drv_err_,("usb_read_port_complete:bSurpriseRemoved=TRUE\n"));
			case -ENOENT:
				padapter->bDriverStopped=_TRUE;
				RT_TRACE(_module_hci_ops_os_c_,_drv_err_,("usb_read_port_complete:bDriverStopped=TRUE\n"));
				break;
			case -EPROTO:
			case -EILSEQ:
			case -ETIME:
			case -ECOMM:
			case -EOVERFLOW:
				rtw_read_port(padapter, precvpriv->ff_hwaddr, 0, (unsigned char *)precvbuf);
				break;
			case -EINPROGRESS:
				DBG_8192C("ERROR: URB IS IN PROGRESS!/n");
				break;
			default:
				break;
		}

	}

exit:

_func_exit_;

}

static u32 usb_read_port(struct intf_hdl *pintfhdl, u32 addr, u32 cnt, u8 *rmem)
{
	int err, pipe;
	u32 ret = _SUCCESS;
	PURB purb = NULL;
	struct recv_buf	*precvbuf = (struct recv_buf *)rmem;
	_adapter *adapter = pintfhdl->padapter;
	struct dvobj_priv	*pdvobj = adapter_to_dvobj(adapter);
	struct recv_priv	*precvpriv = &adapter->recvpriv;
	struct usb_device	*pusbd = pdvobj->pusbdev;

_func_enter_;

	if(adapter->bDriverStopped || adapter->bSurpriseRemoved ||adapter->pwrctrlpriv.pnp_bstop_trx)
	{
		RT_TRACE(_module_hci_ops_os_c_,_drv_err_,("usb_read_port:( padapter->bDriverStopped ||padapter->bSurpriseRemoved ||adapter->pwrctrlpriv.pnp_bstop_trx)!!!\n"));
		return _FAIL;
	}

	if(precvbuf !=NULL)
	{
		rtl8192du_init_recvbuf(adapter, precvbuf);

		if(precvbuf->pbuf)
		{
			precvpriv->rx_pending_cnt++;

			purb = precvbuf->purb;

			//translate DMA FIFO addr to pipehandle
			pipe = ffaddr2pipehdl(pdvobj, addr);

			usb_fill_bulk_urb(purb, pusbd, pipe,
						precvbuf->pbuf,
						MAX_RECVBUF_SZ,
						usb_read_port_complete,
						precvbuf);//context is precvbuf

			purb->transfer_dma = precvbuf->dma_transfer_addr;
			purb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;

			err = usb_submit_urb(purb, GFP_ATOMIC);
			if((err) && (err != (-EPERM)))
			{
				RT_TRACE(_module_hci_ops_os_c_,_drv_err_,("cannot submit rx in-token(err=0x%.8x), URB_STATUS =0x%.8x", err, purb->status));
				DBG_8192C("cannot submit rx in-token(err = 0x%08x),urb_status = %d\n",err,purb->status);
				ret = _FAIL;
			}

		}

	}
	else
	{
		RT_TRACE(_module_hci_ops_os_c_,_drv_err_,("usb_read_port:precvbuf ==NULL\n"));
		ret = _FAIL;
	}

_func_exit_;

	return ret;
}
#else	// CONFIG_USE_USB_BUFFER_ALLOC_RX
static int recvbuf2recvframe(_adapter *padapter, _pkt *pskb)
{
	u8	*pbuf;
	u8	shift_sz = 0;
	u16	pkt_cnt;
	u32	pkt_offset, skb_len, alloc_sz;
	int	transfer_len;
	struct recv_stat	*prxstat;
	struct phy_stat	*pphy_info = NULL;
	_pkt				*pkt_copy = NULL;
	union recv_frame	*precvframe = NULL;
	struct rx_pkt_attrib	*pattrib = NULL;
	HAL_DATA_TYPE	*pHalData = GET_HAL_DATA(padapter);
	struct recv_priv	*precvpriv = &padapter->recvpriv;
	_queue			*pfree_recv_queue = &precvpriv->free_recv_queue;

	transfer_len = pskb->len;
	pbuf = pskb->data;

	prxstat = (struct recv_stat *)pbuf;
	pkt_cnt = (le32_to_cpu(prxstat->rxdw2)>>16) & 0xff;

#if 0 //temp remove when disable usb rx aggregation
	if((pkt_cnt > 10) || (pkt_cnt < 1) || (transfer_len<RXDESC_SIZE) ||(pkt_len<=0))
	{
		return _FAIL;
	}
#endif

	do{
		RT_TRACE(_module_rtl871x_recv_c_, _drv_info_,
			 ("recvbuf2recvframe: rxdesc=offsset 0:0x%08x, 4:0x%08x, 8:0x%08x, C:0x%08x\n",
			  prxstat->rxdw0, prxstat->rxdw1, prxstat->rxdw2, prxstat->rxdw4));

		prxstat = (struct recv_stat *)pbuf;

		precvframe = rtw_alloc_recvframe(pfree_recv_queue);
		if(precvframe==NULL)
		{
			RT_TRACE(_module_rtl871x_recv_c_,_drv_err_,("recvbuf2recvframe: precvframe==NULL\n"));
			DBG_8192C("%s()-%d: rtw_alloc_recvframe() failed! RX Drop!\n", __FUNCTION__, __LINE__);
			goto _exit_recvbuf2recvframe;
		}

		_rtw_init_listhead(&precvframe->u.hdr.list);
		precvframe->u.hdr.precvbuf = NULL;	//can't access the precvbuf for new arch.
		precvframe->u.hdr.len=0;

		rtl8192d_query_rx_desc_status(precvframe, prxstat);

		pattrib = &precvframe->u.hdr.attrib;
		if(pattrib->physt)
		{
			pphy_info = (struct phy_stat *)(pbuf + RXDESC_OFFSET);
		}

		pkt_offset = RXDESC_SIZE + pattrib->drvinfo_sz + pattrib->shift_sz + pattrib->pkt_len;

		if((pattrib->pkt_len<=0) || (pkt_offset>transfer_len))
		{
			RT_TRACE(_module_rtl871x_recv_c_,_drv_info_,("recvbuf2recvframe: pkt_len<=0\n"));
			DBG_8192C("%s()-%d: RX Warning!\n", __FUNCTION__, __LINE__);
			rtw_free_recvframe(precvframe, pfree_recv_queue);
			goto _exit_recvbuf2recvframe;
		}
#ifdef CONFIG_USB_RX_AGGREGATION //no usb rx aggregation, no skb copy
		//	Modified by Albert 20101213
		//	For 8 bytes IP header alignment.
		if (pattrib->qos)	//	Qos data, wireless lan header length is 26
		{
			shift_sz = 6;
		}
		else
		{
			shift_sz = 0;
		}

		skb_len = pattrib->pkt_len;

		// for first fragment packet, driver need allocate 1536+drvinfo_sz+RXDESC_SIZE to defrag packet.
		// modify alloc_sz for recvive crc error packet by thomas 2011-06-02
		if((pattrib->mfrag == 1)&&(pattrib->frag_num == 0)){
			//alloc_sz = 1664;	//1664 is 128 alignment.
			if(skb_len <= 1650)
				alloc_sz = 1664;
			else
				alloc_sz = skb_len + 14;
		}
		else {
			alloc_sz = skb_len;
			//	6 is for IP header 8 bytes alignment in QoS packet case.
			//	8 is for skb->data 4 bytes alignment.
			alloc_sz += 14;
		}

		pkt_copy = rtw_skb_alloc(alloc_sz);

		if(pkt_copy)
		{
			precvframe->u.hdr.pkt = pkt_copy;
			precvframe->u.hdr.rx_head = pkt_copy->data;
			precvframe->u.hdr.rx_end = pkt_copy->data + alloc_sz;
			skb_reserve( pkt_copy, 8 - ((SIZE_PTR)( pkt_copy->data ) & 7 ));//force pkt_copy->data at 8-byte alignment address
			skb_reserve( pkt_copy, shift_sz );//force ip_hdr at 8-byte alignment address according to shift_sz.
			_rtw_memcpy(pkt_copy->data, (pbuf + pattrib->shift_sz + pattrib->drvinfo_sz + RXDESC_SIZE), skb_len);
			precvframe->u.hdr.rx_data = precvframe->u.hdr.rx_tail = pkt_copy->data;
		}
		else
		{
			precvframe->u.hdr.pkt = rtw_skb_clone(pskb);
			if(pkt_copy)
			{
				precvframe->u.hdr.rx_head = precvframe->u.hdr.rx_data = precvframe->u.hdr.rx_tail = pbuf;
				precvframe->u.hdr.rx_end = pbuf + alloc_sz;
			}
			else
			{
				DBG_8192C("recvbuf2recvframe: rtw_skb_clone fail\n");
				rtw_free_recvframe(precvframe, pfree_recv_queue);
				goto _exit_recvbuf2recvframe;
			}
		}

		recvframe_put(precvframe, skb_len);
		//recvframe_pull(precvframe, drvinfo_sz + RXDESC_SIZE);
#else //CONFIG_USB_RX_AGGREGATION
		precvframe->u.hdr.pkt = pskb;
		precvframe->u.hdr.rx_head = pskb->data;
		precvframe->u.hdr.rx_end = skb_end_pointer(pskb);
		precvframe->u.hdr.rx_data = precvframe->u.hdr.rx_tail = pskb->data;
		recvframe_put(precvframe, pkt_offset);
		recvframe_pull(precvframe, pattrib->drvinfo_sz + RXDESC_SIZE);
#endif //CONFIG_USB_RX_AGGREGATION, no usb rx aggregation, no copy
#ifdef CONFIG_USB_RX_AGGREGATION
		switch(pHalData->UsbRxAggMode)
		{
			case USB_RX_AGG_DMA:
			case USB_RX_AGG_DMA_USB:
				pkt_offset = (u16)_RND128(pkt_offset);
				break;
				case USB_RX_AGG_USB:
				pkt_offset = (u16)_RND4(pkt_offset);
				break;
			case USB_RX_AGG_DISABLE:
			default:
				break;
		}
#endif
#ifdef CONFIG_CONCURRENT_MODE
		if(rtw_buddy_adapter_up(padapter))
		{
			if(pre_recv_entry(precvframe, prxstat, pphy_info) != _SUCCESS)
			{
				RT_TRACE(_module_rtl871x_recv_c_,_drv_err_,("recvbuf2recvframe: recv_entry(precvframe) != _SUCCESS\n"));
			}
		}
		else
		{
			rtl8192d_translate_rx_signal_stuff(precvframe, pphy_info);
			if(rtw_recv_entry(precvframe) != _SUCCESS)
			{
				RT_TRACE(_module_rtl871x_recv_c_,_drv_err_,("recvbuf2recvframe: rtw_recv_entry(precvframe) != _SUCCESS\n"));
			}
		}
#else
		rtl8192d_translate_rx_signal_stuff(precvframe, pphy_info);
		if(rtw_recv_entry(precvframe) != _SUCCESS)
		{
			RT_TRACE(_module_rtl871x_recv_c_,_drv_err_,("recvbuf2recvframe: rtw_recv_entry(precvframe) != _SUCCESS\n"));
		}
#endif //CONFIG_CONCURRENT_MODE
		pkt_cnt--;

		transfer_len -= pkt_offset;
		pbuf += pkt_offset;
		precvframe = NULL;
		pkt_copy = NULL;

		if(transfer_len>0 && pkt_cnt==0)
			pkt_cnt = (le32_to_cpu(prxstat->rxdw2)>>16) & 0xff;

	}while((transfer_len>0) && (pkt_cnt>0));

_exit_recvbuf2recvframe:

	return _SUCCESS;
}


void rtl8192du_recv_tasklet(void *priv)
{
	_pkt			*pskb;
	_adapter		*padapter = (_adapter*)priv;
	struct recv_priv	*precvpriv = &padapter->recvpriv;
	struct recv_buf *precvbuf = NULL;

	while (NULL != (pskb = skb_dequeue(&precvpriv->rx_skb_queue)))
	{
		if ((padapter->bDriverStopped == _TRUE)||(padapter->bSurpriseRemoved== _TRUE))
		{
			DBG_8192C("recv_tasklet => bDriverStopped or bSurpriseRemoved \n");
			rtw_skb_free(pskb);
			break;
		}

		recvbuf2recvframe(padapter, pskb);
#ifdef CONFIG_USB_RX_AGGREGATION //no usb rx aggregation, no copy
#ifdef CONFIG_PREALLOC_RECV_SKB

		skb_reset_tail_pointer(pskb);
		pskb->len = 0;

		skb_queue_tail(&precvpriv->free_recv_skb_queue, pskb);

#else
		rtw_skb_free(pskb);
#endif
#endif //CONFIG_USB_RX_AGGREGATION, no usb rx aggregation, no copy

	}

	while (NULL != (precvbuf = rtw_dequeue_recvbuf(&precvpriv->recv_buf_pending_queue)))
	{
		precvbuf->pskb = NULL;
		precvbuf->reuse = _FALSE;
		rtw_read_port(padapter, precvpriv->ff_hwaddr, 0, (unsigned char *)precvbuf);
	}
}


static void usb_read_port_complete(struct urb *purb, struct pt_regs *regs)
{
	_irqL irqL;
	uint isevt, *pbuf;
	struct recv_buf	*precvbuf = (struct recv_buf *)purb->context;
	_adapter			*padapter =(_adapter *)precvbuf->adapter;
	struct recv_priv	*precvpriv = &padapter->recvpriv;

	RT_TRACE(_module_hci_ops_os_c_,_drv_err_,("usb_read_port_complete!!!\n"));

	//_enter_critical(&precvpriv->lock, &irqL);
	//precvbuf->irp_pending=_FALSE;
	//precvpriv->rx_pending_cnt --;
	//_exit_critical(&precvpriv->lock, &irqL);

	precvpriv->rx_pending_cnt --;

	//if(precvpriv->rx_pending_cnt== 0)
	//{
	//	RT_TRACE(_module_hci_ops_os_c_,_drv_err_,("usb_read_port_complete: rx_pending_cnt== 0, set allrxreturnevt!\n"));
	//	_rtw_up_sema(&precvpriv->allrxreturnevt);
	//}

	if(padapter->bSurpriseRemoved || padapter->bDriverStopped||padapter->bReadPortCancel)
	{
		RT_TRACE(_module_hci_ops_os_c_,_drv_err_,("usb_read_port_complete:bDriverStopped(%d) OR bSurpriseRemoved(%d)\n", padapter->bDriverStopped, padapter->bSurpriseRemoved));

	#ifdef CONFIG_PREALLOC_RECV_SKB
		precvbuf->reuse = _TRUE;
	#else
		if(precvbuf->pskb){
			DBG_8192C("==> free skb(%p)\n",precvbuf->pskb);
			rtw_skb_free(precvbuf->pskb);
		}
	#endif

		goto exit;
	}

	if(purb->status==0)//SUCCESS
	{
		if ((purb->actual_length > MAX_RECVBUF_SZ) || (purb->actual_length < RXDESC_SIZE))
		{
			RT_TRACE(_module_hci_ops_os_c_,_drv_err_,("usb_read_port_complete: (purb->actual_length > MAX_RECVBUF_SZ) || (purb->actual_length < RXDESC_SIZE)\n"));
			precvbuf->reuse = _TRUE;
			rtw_read_port(padapter, precvpriv->ff_hwaddr, 0, (unsigned char *)precvbuf);
		}
		else
		{
			precvbuf->transfer_len = purb->actual_length;

			skb_put(precvbuf->pskb, purb->actual_length);
			skb_queue_tail(&precvpriv->rx_skb_queue, precvbuf->pskb);

			if (skb_queue_len(&precvpriv->rx_skb_queue)<=1)
				tasklet_schedule(&precvpriv->recv_tasklet);

			precvbuf->pskb = NULL;
			precvbuf->reuse = _FALSE;
			rtw_read_port(padapter, precvpriv->ff_hwaddr, 0, (unsigned char *)precvbuf);
		}
	}
	else
	{
		RT_TRACE(_module_hci_ops_os_c_,_drv_err_,("usb_read_port_complete : purb->status(%d) != 0 \n", purb->status));

		DBG_8192C("###=> usb_read_port_complete => urb status(%d)\n", purb->status);

		switch(purb->status) {
			case -EINVAL:
			case -EPIPE:
			case -ENODEV:
			case -ESHUTDOWN:
				//padapter->bSurpriseRemoved=_TRUE;
				RT_TRACE(_module_hci_ops_os_c_,_drv_err_,("usb_read_port_complete:bSurpriseRemoved=TRUE\n"));
			case -ENOENT:
				padapter->bDriverStopped=_TRUE;
				RT_TRACE(_module_hci_ops_os_c_,_drv_err_,("usb_read_port_complete:bDriverStopped=TRUE\n"));
				break;
			case -EPROTO:
			case -EILSEQ:
			case -ETIME:
			case -ECOMM:
			case -EOVERFLOW:
				precvbuf->reuse = _TRUE;
				rtw_read_port(padapter, precvpriv->ff_hwaddr, 0, (unsigned char *)precvbuf);
				break;
			case -EINPROGRESS:
				DBG_8192C("ERROR: URB IS IN PROGRESS!/n");
				break;
			default:
				break;
		}

	}

exit:

_func_exit_;

}

static u32 usb_read_port(struct intf_hdl *pintfhdl, u32 addr, u32 cnt, u8 *rmem)
{
	_irqL irqL;
	int err, pipe;
	SIZE_PTR tmpaddr=0;
	SIZE_PTR alignment=0;
	u32 ret = _SUCCESS;
	PURB purb = NULL;
	struct recv_buf	*precvbuf = (struct recv_buf *)rmem;
	_adapter *adapter = pintfhdl->padapter;
	struct dvobj_priv	*pdvobj = adapter_to_dvobj(adapter);
	struct recv_priv	*precvpriv = &adapter->recvpriv;
	struct usb_device	*pusbd = pdvobj->pusbdev;

_func_enter_;

	if(adapter->bDriverStopped || adapter->bSurpriseRemoved ||adapter->pwrctrlpriv.pnp_bstop_trx)
	{
		RT_TRACE(_module_hci_ops_os_c_,_drv_err_,("usb_read_port:( padapter->bDriverStopped ||padapter->bSurpriseRemoved ||adapter->pwrctrlpriv.pnp_bstop_trx)!!!\n"));
		return _FAIL;
	}

#ifdef CONFIG_PREALLOC_RECV_SKB
	if((precvbuf->reuse == _FALSE) || (precvbuf->pskb == NULL))
	{
		if (NULL != (precvbuf->pskb = skb_dequeue(&precvpriv->free_recv_skb_queue)))
		{
			precvbuf->reuse = _TRUE;
		}
	}
#endif


	if(precvbuf !=NULL)
	{
		rtl8192du_init_recvbuf(adapter, precvbuf);

		//re-assign for linux based on skb
		if((precvbuf->reuse == _FALSE) || (precvbuf->pskb == NULL))
		{
			precvbuf->pskb = rtw_skb_alloc(MAX_RECVBUF_SZ + RECVBUFF_ALIGN_SZ);

			if(precvbuf->pskb == NULL)
			{
				RT_TRACE(_module_hci_ops_os_c_,_drv_err_,("init_recvbuf(): alloc_skb fail!\n"));
				rtw_enqueue_recvbuf(precvbuf, &precvpriv->recv_buf_pending_queue);
				return _FAIL;
			}

			tmpaddr = (SIZE_PTR)precvbuf->pskb->data;
			alignment = tmpaddr & (RECVBUFF_ALIGN_SZ-1);
			skb_reserve(precvbuf->pskb, (RECVBUFF_ALIGN_SZ - alignment));

			precvbuf->phead = precvbuf->pskb->head;
			precvbuf->pdata = precvbuf->pskb->data;
			precvbuf->ptail = skb_tail_pointer(precvbuf->pskb);
			precvbuf->pend = skb_end_pointer(precvbuf->pskb);
			precvbuf->pbuf = precvbuf->pskb->data;
		}
		else//reuse skb
		{
			precvbuf->phead = precvbuf->pskb->head;
			precvbuf->pdata = precvbuf->pskb->data;
			precvbuf->ptail = skb_tail_pointer(precvbuf->pskb);
			precvbuf->pend = skb_end_pointer(precvbuf->pskb);
			precvbuf->pbuf = precvbuf->pskb->data;

			precvbuf->reuse = _FALSE;
		}

		//_enter_critical(&precvpriv->lock, &irqL);
		//precvpriv->rx_pending_cnt++;
		//precvbuf->irp_pending = _TRUE;
		//_exit_critical(&precvpriv->lock, &irqL);

		precvpriv->rx_pending_cnt++;

		purb = precvbuf->purb;

		//translate DMA FIFO addr to pipehandle
		pipe = ffaddr2pipehdl(pdvobj, addr);

		usb_fill_bulk_urb(purb, pusbd, pipe,
						precvbuf->pbuf,
						MAX_RECVBUF_SZ,
						usb_read_port_complete,
						precvbuf);//context is precvbuf

		err = usb_submit_urb(purb, GFP_ATOMIC);
		if((err) && (err != (-EPERM)))
		{
			RT_TRACE(_module_hci_ops_os_c_,_drv_err_,("cannot submit rx in-token(err=0x%.8x), URB_STATUS =0x%.8x", err, purb->status));
			DBG_8192C("cannot submit rx in-token(err = 0x%08x),urb_status = %d\n",err,purb->status);
			ret = _FAIL;
		}
	}
	else
	{
		RT_TRACE(_module_hci_ops_os_c_,_drv_err_,("usb_read_port:precvbuf ==NULL\n"));
		ret = _FAIL;
	}

_func_exit_;

	return ret;
}
#endif	// CONFIG_USE_USB_BUFFER_ALLOC_RX

void rtl8192du_xmit_tasklet(void *priv)
{
	int ret = _FALSE;
	_adapter *padapter = (_adapter*)priv;
	struct xmit_priv *pxmitpriv = &padapter->xmitpriv;

	if(check_fwstate(&padapter->mlmepriv, _FW_UNDER_SURVEY) == _TRUE
#ifdef CONFIG_DUALMAC_CONCURRENT
		|| (dc_check_xmit(padapter)== _FALSE)
#endif
		)
		return;

	while(1)
	{
		if ((padapter->bDriverStopped == _TRUE)||(padapter->bSurpriseRemoved== _TRUE))
		{
			DBG_8192C("xmit_tasklet => bDriverStopped or bSurpriseRemoved \n");
			break;
		}

		ret = rtl8192du_xmitframe_complete(padapter, pxmitpriv, NULL);

		if(ret==_FALSE)
			break;
	}

}

void rtl8192du_set_intf_ops(struct _io_ops	*pops)
{
	_func_enter_;

	_rtw_memset((u8 *)pops, 0, sizeof(struct _io_ops));

	pops->_read8 = &usb_read8;
	pops->_read16 = &usb_read16;
	pops->_read32 = &usb_read32;
	pops->_read_mem = &usb_read_mem;
	pops->_read_port = &usb_read_port;

	pops->_write8 = &usb_write8;
	pops->_write16 = &usb_write16;
	pops->_write32 = &usb_write32;
	pops->_writeN = &usb_writeN;

#ifdef CONFIG_USB_SUPPORT_ASYNC_VDN_REQ
	pops->_write8_async= &usb_async_write8;
	pops->_write16_async = &usb_async_write16;
	pops->_write32_async = &usb_async_write32;
#endif
	pops->_write_mem = &usb_write_mem;
	pops->_write_port = &usb_write_port;

	pops->_read_port_cancel = &usb_read_port_cancel;
	pops->_write_port_cancel = &usb_write_port_cancel;

#ifdef CONFIG_USB_INTERRUPT_IN_PIPE
	pops->_read_interrupt = &usb_read_interrupt;
#endif

	_func_exit_;

}