1 files changed, 726 insertions, 0 deletions

diff --git a/drivers/staging/rtl8188eu/hal/usb_ops_linux.c b/drivers/staging/rtl8188eu/hal/usb_ops_linux.c
new file mode 100644
index 000000000000..bc564169b2f0
--- /dev/null
+++ b/drivers/staging/rtl8188eu/hal/usb_ops_linux.c
@@ -0,0 +1,726 @@
+/******************************************************************************
+ *
+ * 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");
+}