Commit d3f4b828 authored by Larry Finger's avatar Larry Finger Committed by Greg Kroah-Hartman
Browse files

staging: r8188eu: Add files for new driver - part 18 



This commit adds files hal/usb_halinit.c and hal/usb_ops_linux.c.

Signed-off-by: default avatarLarry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 7bc88639

drivers/staging/rtl8188eu/hal/usb_halinit.c

0 → 100644
+2346 −0

File added.

Preview size limit exceeded, changes collapsed.

drivers/staging/rtl8188eu/hal/usb_ops_linux.c

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+726 −0
Original line number Diff line number Diff line 
/******************************************************************************

 *

 * 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 <osdep_service.h>

#include <drv_types.h>

#include <osdep_intf.h>

#include <usb_ops.h>

#include <recv_osdep.h>

#include <rtl8188e_hal.h>



static int usbctrl_vendorreq(struct intf_hdl *pintfhdl, u8 request, u16 value, u16 index, void *pdata, u16 len, u8 requesttype)

{

	struct adapter	*adapt = pintfhdl->padapter;

	struct dvobj_priv  *dvobjpriv = adapter_to_dvobj(adapt);

	struct usb_device *udev = dvobjpriv->pusbdev;

	unsigned int pipe;

	int status = 0;

	u8 reqtype;

	u8 *pIo_buf;

	int vendorreq_times = 0;



	if ((adapt->bSurpriseRemoved) || (adapt->pwrctrlpriv.pnp_bstop_trx)) {

		RT_TRACE(_module_hci_ops_os_c_, _drv_err_, ("usbctrl_vendorreq:(adapt->bSurpriseRemoved ||adapter->pwrctrlpriv.pnp_bstop_trx)!!!\n"));

		status = -EPERM;

		goto exit;

	}



	if (len > MAX_VENDOR_REQ_CMD_SIZE) {

		DBG_88E("[%s] Buffer len error ,vendor request failed\n", __func__);

		status = -EINVAL;

		goto exit;

	}



	_enter_critical_mutex(&dvobjpriv->usb_vendor_req_mutex, NULL);



	/*  Acquire IO memory for vendorreq */

	pIo_buf = dvobjpriv->usb_vendor_req_buf;



	if (pIo_buf == NULL) {

		DBG_88E("[%s] pIo_buf == NULL\n", __func__);

		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;

			memcpy(pIo_buf, pdata, len);

		}



		status = rtw_usb_control_msg(udev, pipe, request, reqtype, value, index, pIo_buf, len, RTW_USB_CONTROL_MSG_TIMEOUT);



		if (status == len) {   /*  Success this control transfer. */

			rtw_reset_continual_urb_error(dvobjpriv);

			if (requesttype == 0x01)

				memcpy(pdata, pIo_buf,  len);

		} else { /*  error cases */

			DBG_88E("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) {

					adapt->bSurpriseRemoved = true;

				} else {

					struct hal_data_8188e	*haldata = GET_HAL_DATA(adapt);

					haldata->srestpriv.Wifi_Error_Status = USB_VEN_REQ_CMD_FAIL;

				}

			} 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. */

						memcpy(pdata, pIo_buf,  len);

					}

				}

			}



			if (rtw_inc_and_chk_continual_urb_error(dvobjpriv)) {

				adapt->bSurpriseRemoved = true;

				break;

			}



		}



		/*  firmware download is checksumed, don't retry */

		if ((value >= FW_8188E_START_ADDRESS && value <= FW_8188E_END_ADDRESS) || status == len)

			break;

	}

release_mutex:

	_exit_critical_mutex(&dvobjpriv->usb_vendor_req_mutex, NULL);

exit:

	return status;

}



static u8 usb_read8(struct intf_hdl *pintfhdl, u32 addr)

{

	u8 request;

	u8 requesttype;

	u16 wvalue;

	u16 index;

	u16 len;

	u8 data = 0;



	_func_enter_;



	request = 0x05;

	requesttype = 0x01;/* read_in */

	index = 0;/* n/a */



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

	len = 1;



	usbctrl_vendorreq(pintfhdl, request, wvalue, index, &data, len, requesttype);



	_func_exit_;



	return data;



}



static u16 usb_read16(struct intf_hdl *pintfhdl, u32 addr)

{

	u8 request;

	u8 requesttype;

	u16 wvalue;

	u16 index;

	u16 len;

	__le32 data;



_func_enter_;

	request = 0x05;

	requesttype = 0x01;/* read_in */

	index = 0;/* n/a */

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

	len = 2;

	usbctrl_vendorreq(pintfhdl, request, wvalue, index, &data, len, requesttype);

_func_exit_;



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

}



static u32 usb_read32(struct intf_hdl *pintfhdl, u32 addr)

{

	u8 request;

	u8 requesttype;

	u16 wvalue;

	u16 index;

	u16 len;

	__le32 data;



_func_enter_;



	request = 0x05;

	requesttype = 0x01;/* read_in */

	index = 0;/* n/a */



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

	len = 4;



	usbctrl_vendorreq(pintfhdl, request, wvalue, index, &data, len, requesttype);



_func_exit_;



	return le32_to_cpu(data);

}



static int usb_write8(struct intf_hdl *pintfhdl, u32 addr, u8 val)

{

	u8 request;

	u8 requesttype;

	u16 wvalue;

	u16 index;

	u16 len;

	u8 data;

	int ret;



	_func_enter_;

	request = 0x05;

	requesttype = 0x00;/* write_out */

	index = 0;/* n/a */

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

	len = 1;

	data = val;

	ret = usbctrl_vendorreq(pintfhdl, request, wvalue, index, &data, len, requesttype);

	_func_exit_;

	return ret;

}



static int usb_write16(struct intf_hdl *pintfhdl, u32 addr, u16 val)

{

	u8 request;

	u8 requesttype;

	u16 wvalue;

	u16 index;

	u16 len;

	__le32 data;

	int ret;



	_func_enter_;



	request = 0x05;

	requesttype = 0x00;/* write_out */

	index = 0;/* n/a */



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

	len = 2;



	data = cpu_to_le32(val & 0x0000ffff);



	ret = usbctrl_vendorreq(pintfhdl, request, wvalue, index, &data, len, requesttype);



	_func_exit_;



	return ret;

}



static int usb_write32(struct intf_hdl *pintfhdl, u32 addr, u32 val)

{

	u8 request;

	u8 requesttype;

	u16 wvalue;

	u16 index;

	u16 len;

	__le32 data;

	int ret;



	_func_enter_;



	request = 0x05;

	requesttype = 0x00;/* write_out */

	index = 0;/* n/a */



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

	len = 4;

	data = cpu_to_le32(val);



	ret = usbctrl_vendorreq(pintfhdl, request, wvalue, index, &data, len, requesttype);



	_func_exit_;



	return ret;

}



static int usb_writeN(struct intf_hdl *pintfhdl, u32 addr, u32 length, u8 *pdata)

{

	u8 request;

	u8 requesttype;

	u16 wvalue;

	u16 index;

	u16 len;

	u8 buf[VENDOR_CMD_MAX_DATA_LEN] = {0};

	int ret;



	_func_enter_;



	request = 0x05;

	requesttype = 0x00;/* write_out */

	index = 0;/* n/a */



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

	len = length;

	 memcpy(buf, pdata, len);



	ret = usbctrl_vendorreq(pintfhdl, request, wvalue, index, buf, len, requesttype);



	_func_exit_;



	return ret;

}



static void interrupt_handler_8188eu(struct adapter *adapt, u16 pkt_len, u8 *pbuf)

{

	struct hal_data_8188e	*haldata = GET_HAL_DATA(adapt);



	if (pkt_len != INTERRUPT_MSG_FORMAT_LEN) {

		DBG_88E("%s Invalid interrupt content length (%d)!\n", __func__, pkt_len);

		return;

	}



	/*  HISR */

	memcpy(&(haldata->IntArray[0]), &(pbuf[USB_INTR_CONTENT_HISR_OFFSET]), 4);

	memcpy(&(haldata->IntArray[1]), &(pbuf[USB_INTR_CONTENT_HISRE_OFFSET]), 4);



	/*  C2H Event */

	if (pbuf[0] != 0)

		memcpy(&(haldata->C2hArray[0]), &(pbuf[USB_INTR_CONTENT_C2H_OFFSET]), 16);

}



static int recvbuf2recvframe(struct adapter *adapt, struct sk_buff *pskb)

{

	u8	*pbuf;

	u8	shift_sz = 0;

	u16	pkt_cnt;

	u32	pkt_offset, skb_len, alloc_sz;

	s32	transfer_len;

	struct recv_stat	*prxstat;

	struct phy_stat	*pphy_status = NULL;

	struct sk_buff *pkt_copy = NULL;

	union recv_frame	*precvframe = NULL;

	struct rx_pkt_attrib	*pattrib = NULL;

	struct hal_data_8188e	*haldata = GET_HAL_DATA(adapt);

	struct recv_priv	*precvpriv = &adapt->recvpriv;

	struct __queue *pfree_recv_queue = &precvpriv->free_recv_queue;



	transfer_len = (s32)pskb->len;

	pbuf = pskb->data;



	prxstat = (struct recv_stat *)pbuf;

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



	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_88E("%s()-%d: rtw_alloc_recvframe() failed! RX Drop!\n", __func__, __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;



		update_recvframe_attrib_88e(precvframe, prxstat);



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



		if ((pattrib->crc_err) || (pattrib->icv_err)) {

			DBG_88E("%s: RX Warning! crc_err=%d icv_err=%d, skip!\n", __func__, pattrib->crc_err, pattrib->icv_err);



			rtw_free_recvframe(precvframe, pfree_recv_queue);

			goto _exit_recvbuf2recvframe;

		}



		if ((pattrib->physt) && (pattrib->pkt_rpt_type == NORMAL_RX))

			pphy_status = (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_88E("%s()-%d: RX Warning!,pkt_len<=0 or pkt_offset> transfoer_len\n", __func__, __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)) {

			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 = netdev_alloc_skb(adapt->pnetdev, alloc_sz);

		if (pkt_copy) {

			pkt_copy->dev = adapt->pnetdev;

			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_t)(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. */

			memcpy(pkt_copy->data, (pbuf + pattrib->drvinfo_sz + RXDESC_SIZE), skb_len);

			precvframe->u.hdr.rx_tail = pkt_copy->data;

			precvframe->u.hdr.rx_data = pkt_copy->data;

		} else {

			if ((pattrib->mfrag == 1) && (pattrib->frag_num == 0)) {

				DBG_88E("recvbuf2recvframe: alloc_skb fail , drop frag frame\n");

				rtw_free_recvframe(precvframe, pfree_recv_queue);

				goto _exit_recvbuf2recvframe;

			}

			precvframe->u.hdr.pkt = skb_clone(pskb, GFP_ATOMIC);

			if (precvframe->u.hdr.pkt) {

				precvframe->u.hdr.rx_tail = pbuf + pattrib->drvinfo_sz + RXDESC_SIZE;

				precvframe->u.hdr.rx_head = precvframe->u.hdr.rx_tail;

				precvframe->u.hdr.rx_data = precvframe->u.hdr.rx_tail;

				precvframe->u.hdr.rx_end =  pbuf + pattrib->drvinfo_sz + RXDESC_SIZE + alloc_sz;

			} else {

				DBG_88E("recvbuf2recvframe: skb_clone fail\n");

				rtw_free_recvframe(precvframe, pfree_recv_queue);

				goto _exit_recvbuf2recvframe;

			}

		}



		recvframe_put(precvframe, skb_len);



		switch (haldata->UsbRxAggMode) {

		case USB_RX_AGG_DMA:

		case USB_RX_AGG_MIX:

			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;

		}

		if (pattrib->pkt_rpt_type == NORMAL_RX) { /* Normal rx packet */

			if (pattrib->physt)

				update_recvframe_phyinfo_88e(precvframe, (struct phy_stat *)pphy_status);

			if (rtw_recv_entry(precvframe) != _SUCCESS) {

				RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,

					("recvbuf2recvframe: rtw_recv_entry(precvframe) != _SUCCESS\n"));

			}

		} else {

			/* enqueue recvframe to txrtp queue */

			if (pattrib->pkt_rpt_type == TX_REPORT1) {

				/* CCX-TXRPT ack for xmit mgmt frames. */

				handle_txrpt_ccx_88e(adapt, precvframe->u.hdr.rx_data);

			} else if (pattrib->pkt_rpt_type == TX_REPORT2) {

				ODM_RA_TxRPT2Handle_8188E(

							&haldata->odmpriv,

							precvframe->u.hdr.rx_data,

							pattrib->pkt_len,

							pattrib->MacIDValidEntry[0],

							pattrib->MacIDValidEntry[1]

							);

			} else if (pattrib->pkt_rpt_type == HIS_REPORT) {

				interrupt_handler_8188eu(adapt, pattrib->pkt_len, precvframe->u.hdr.rx_data);

			}

			rtw_free_recvframe(precvframe, pfree_recv_queue);

		}

		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 rtl8188eu_recv_tasklet(void *priv)

{

	struct sk_buff *pskb;

	struct adapter *adapt = (struct adapter *)priv;

	struct recv_priv *precvpriv = &adapt->recvpriv;



	while (NULL != (pskb = skb_dequeue(&precvpriv->rx_skb_queue))) {

		if ((adapt->bDriverStopped) || (adapt->bSurpriseRemoved)) {

			DBG_88E("recv_tasklet => bDriverStopped or bSurpriseRemoved\n");

			dev_kfree_skb_any(pskb);

			break;

		}

		recvbuf2recvframe(adapt, pskb);

		skb_reset_tail_pointer(pskb);

		pskb->len = 0;

		skb_queue_tail(&precvpriv->free_recv_skb_queue, pskb);

	}

}



static void usb_read_port_complete(struct urb *purb, struct pt_regs *regs)

{

	struct recv_buf	*precvbuf = (struct recv_buf *)purb->context;

	struct adapter	*adapt = (struct adapter *)precvbuf->adapter;

	struct recv_priv *precvpriv = &adapt->recvpriv;



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



	precvpriv->rx_pending_cnt--;



	if (adapt->bSurpriseRemoved || adapt->bDriverStopped || adapt->bReadPortCancel) {

		RT_TRACE(_module_hci_ops_os_c_, _drv_err_,

			 ("usb_read_port_complete:bDriverStopped(%d) OR bSurpriseRemoved(%d)\n",

			 adapt->bDriverStopped, adapt->bSurpriseRemoved));



		precvbuf->reuse = true;

		DBG_88E("%s() RX Warning! bDriverStopped(%d) OR bSurpriseRemoved(%d) bReadPortCancel(%d)\n",

			__func__, adapt->bDriverStopped,

			adapt->bSurpriseRemoved, adapt->bReadPortCancel);

		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(adapt, precvpriv->ff_hwaddr, 0, (unsigned char *)precvbuf);

			DBG_88E("%s()-%d: RX Warning!\n", __func__, __LINE__);

		} else {

			rtw_reset_continual_urb_error(adapter_to_dvobj(adapt));



			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(adapt, 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_88E("###=> usb_read_port_complete => urb status(%d)\n", purb->status);



		if (rtw_inc_and_chk_continual_urb_error(adapter_to_dvobj(adapt)))

			adapt->bSurpriseRemoved = true;



		switch (purb->status) {

		case -EINVAL:

		case -EPIPE:

		case -ENODEV:

		case -ESHUTDOWN:

			RT_TRACE(_module_hci_ops_os_c_, _drv_err_, ("usb_read_port_complete:bSurpriseRemoved=true\n"));

		case -ENOENT:

			adapt->bDriverStopped = true;

			RT_TRACE(_module_hci_ops_os_c_, _drv_err_, ("usb_read_port_complete:bDriverStopped=true\n"));

			break;

		case -EPROTO:

		case -EOVERFLOW:

			{

				struct hal_data_8188e	*haldata = GET_HAL_DATA(adapt);

				haldata->srestpriv.Wifi_Error_Status = USB_READ_PORT_FAIL;

			}

			precvbuf->reuse = true;

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

			break;

		case -EINPROGRESS:

			DBG_88E("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)

{

	struct urb *purb = NULL;

	struct recv_buf	*precvbuf = (struct recv_buf *)rmem;

	struct adapter		*adapter = pintfhdl->padapter;

	struct dvobj_priv	*pdvobj = adapter_to_dvobj(adapter);

	struct recv_priv	*precvpriv = &adapter->recvpriv;

	struct usb_device	*pusbd = pdvobj->pusbdev;

	int err;

	unsigned int pipe;

	size_t tmpaddr = 0;

	size_t alignment = 0;

	u32 ret = _SUCCESS;



_func_enter_;



	if (adapter->bDriverStopped || adapter->bSurpriseRemoved ||

	    adapter->pwrctrlpriv.pnp_bstop_trx) {

		RT_TRACE(_module_hci_ops_os_c_, _drv_err_,

			 ("usb_read_port:(adapt->bDriverStopped ||adapt->bSurpriseRemoved ||adapter->pwrctrlpriv.pnp_bstop_trx)!!!\n"));

		return _FAIL;

	}



	if ((!precvbuf->reuse) || (precvbuf->pskb == NULL)) {

		precvbuf->pskb = skb_dequeue(&precvpriv->free_recv_skb_queue);

		if (NULL != precvbuf->pskb)

			precvbuf->reuse = true;

	}



	if (precvbuf != NULL) {

		rtl8188eu_init_recvbuf(adapter, precvbuf);



		/* re-assign for linux based on skb */

		if ((!precvbuf->reuse) || (precvbuf->pskb == NULL)) {

			precvbuf->pskb = netdev_alloc_skb(adapter->pnetdev, 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"));

				DBG_88E("#### usb_read_port() alloc_skb fail!#####\n");

				return _FAIL;

			}



			tmpaddr = (size_t)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;

		}



		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_88E("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;

}



void rtl8188eu_xmit_tasklet(void *priv)

{

	int ret = false;

	struct adapter *adapt = (struct adapter *)priv;

	struct xmit_priv *pxmitpriv = &adapt->xmitpriv;



	if (check_fwstate(&adapt->mlmepriv, _FW_UNDER_SURVEY))

		return;



	while (1) {

		if ((adapt->bDriverStopped) ||

		    (adapt->bSurpriseRemoved) ||

		    (adapt->bWritePortCancel)) {

			DBG_88E("xmit_tasklet => bDriverStopped or bSurpriseRemoved or bWritePortCancel\n");

			break;

		}



		ret = rtl8188eu_xmitframe_complete(adapt, pxmitpriv, NULL);



		if (!ret)

			break;

	}

}



void rtl8188eu_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;

	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;

	_func_exit_;

}



void rtl8188eu_set_hw_type(struct adapter *adapt)

{

	adapt->chip_type = RTL8188E;

	adapt->HardwareType = HARDWARE_TYPE_RTL8188EU;

	DBG_88E("CHIP TYPE: RTL8188E\n");

}