staging: r8188eu: Add files for new driver - part 20

This commit adds files os_dep/usb_intf.c, os_dep/usb_ops_linux.c,
and os_dep/xmit_linux.c.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

3 files changed, 1469 insertions, 0 deletions

diff --git a/drivers/staging/rtl8188eu/os_dep/usb_intf.c b/drivers/staging/rtl8188eu/os_dep/usb_intf.c
new file mode 100644
index 0000000..d3078d2
--- /dev/null
+++ b/drivers/staging/rtl8188eu/os_dep/usb_intf.c
@@ -0,0 +1,892 @@
+/******************************************************************************
+ *
+ * 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_INTF_C_
+
+#include <osdep_service.h>
+#include <drv_types.h>
+#include <recv_osdep.h>
+#include <xmit_osdep.h>
+#include <hal_intf.h>
+#include <rtw_version.h>
+#include <linux/usb.h>
+#include <osdep_intf.h>
+
+#include <usb_vendor_req.h>
+#include <usb_ops.h>
+#include <usb_osintf.h>
+#include <usb_hal.h>
+#include <rtw_ioctl.h>
+
+int ui_pid[3] = {0, 0, 0};
+
+static int rtw_suspend(struct usb_interface *intf, pm_message_t message);
+static int rtw_resume(struct usb_interface *intf);
+
+
+static int rtw_drv_init(struct usb_interface *pusb_intf, const struct usb_device_id *pdid);
+static void rtw_dev_remove(struct usb_interface *pusb_intf);
+
+
+#define USB_VENDER_ID_REALTEK		0x0bda
+
+/* DID_USB_v916_20130116 */
+static struct usb_device_id rtw_usb_id_tbl[] = {
+	/*=== Realtek demoboard ===*/
+	{USB_DEVICE(USB_VENDER_ID_REALTEK, 0x8179)}, /* 8188EUS */
+	{USB_DEVICE(USB_VENDER_ID_REALTEK, 0x0179)}, /* 8188ETV */
+	/*=== Customer ID ===*/
+	/****** 8188EUS ********/
+	{USB_DEVICE(0x8179, 0x07B8)}, /* Abocom - Abocom */
+	{}	/* Terminating entry */
+};
+
+MODULE_DEVICE_TABLE(usb, rtw_usb_id_tbl);
+
+static struct specific_device_id specific_device_id_tbl[] = {
+	{}		/* empty table for now */
+};
+
+struct rtw_usb_drv {
+	struct usb_driver usbdrv;
+	int drv_registered;
+	struct mutex hw_init_mutex;
+};
+
+static struct rtw_usb_drv rtl8188e_usb_drv = {
+	.usbdrv.name = (char *)"r8188eu",
+	.usbdrv.probe = rtw_drv_init,
+	.usbdrv.disconnect = rtw_dev_remove,
+	.usbdrv.id_table = rtw_usb_id_tbl,
+	.usbdrv.suspend =  rtw_suspend,
+	.usbdrv.resume = rtw_resume,
+	.usbdrv.reset_resume   = rtw_resume,
+};
+
+static struct rtw_usb_drv *usb_drv = &rtl8188e_usb_drv;
+
+static inline int RT_usb_endpoint_dir_in(const struct usb_endpoint_descriptor *epd)
+{
+	return (epd->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_IN;
+}
+
+static inline int RT_usb_endpoint_dir_out(const struct usb_endpoint_descriptor *epd)
+{
+	return (epd->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT;
+}
+
+static inline int RT_usb_endpoint_xfer_int(const struct usb_endpoint_descriptor *epd)
+{
+	return (epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT;
+}
+
+static inline int RT_usb_endpoint_xfer_bulk(const struct usb_endpoint_descriptor *epd)
+{
+	return (epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_BULK;
+}
+
+static inline int RT_usb_endpoint_is_bulk_in(const struct usb_endpoint_descriptor *epd)
+{
+	return RT_usb_endpoint_xfer_bulk(epd) && RT_usb_endpoint_dir_in(epd);
+}
+
+static inline int RT_usb_endpoint_is_bulk_out(const struct usb_endpoint_descriptor *epd)
+{
+	return RT_usb_endpoint_xfer_bulk(epd) && RT_usb_endpoint_dir_out(epd);
+}
+
+static inline int usb_endpoint_is_int(const struct usb_endpoint_descriptor *epd)
+{
+	return RT_usb_endpoint_xfer_int(epd) && RT_usb_endpoint_dir_in(epd);
+}
+
+static inline int RT_usb_endpoint_num(const struct usb_endpoint_descriptor *epd)
+{
+	return epd->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
+}
+
+static u8 rtw_init_intf_priv(struct dvobj_priv *dvobj)
+{
+	u8 rst = _SUCCESS;
+
+	_rtw_mutex_init(&dvobj->usb_vendor_req_mutex);
+
+	dvobj->usb_alloc_vendor_req_buf = rtw_zmalloc(MAX_USB_IO_CTL_SIZE);
+	if (dvobj->usb_alloc_vendor_req_buf == NULL) {
+		DBG_88E("alloc usb_vendor_req_buf failed... /n");
+		rst = _FAIL;
+		goto exit;
+	}
+	dvobj->usb_vendor_req_buf = (u8 *)N_BYTE_ALIGMENT((size_t)(dvobj->usb_alloc_vendor_req_buf), ALIGNMENT_UNIT);
+exit:
+	return rst;
+}
+
+static u8 rtw_deinit_intf_priv(struct dvobj_priv *dvobj)
+{
+	u8 rst = _SUCCESS;
+
+	kfree(dvobj->usb_alloc_vendor_req_buf);
+	_rtw_mutex_free(&dvobj->usb_vendor_req_mutex);
+	return rst;
+}
+
+static struct dvobj_priv *usb_dvobj_init(struct usb_interface *usb_intf)
+{
+	int	i;
+	int	status = _FAIL;
+	struct dvobj_priv *pdvobjpriv;
+	struct usb_host_config		*phost_conf;
+	struct usb_config_descriptor	*pconf_desc;
+	struct usb_host_interface	*phost_iface;
+	struct usb_interface_descriptor	*piface_desc;
+	struct usb_host_endpoint	*phost_endp;
+	struct usb_endpoint_descriptor	*pendp_desc;
+	struct usb_device	*pusbd;
+
+_func_enter_;
+
+	pdvobjpriv = (struct dvobj_priv *)rtw_zmalloc(sizeof(*pdvobjpriv));
+	if (pdvobjpriv == NULL)
+		goto exit;
+
+	pdvobjpriv->pusbintf = usb_intf;
+	pusbd = interface_to_usbdev(usb_intf);
+	pdvobjpriv->pusbdev = pusbd;
+	usb_set_intfdata(usb_intf, pdvobjpriv);
+
+	pdvobjpriv->RtNumInPipes = 0;
+	pdvobjpriv->RtNumOutPipes = 0;
+
+	phost_conf = pusbd->actconfig;
+	pconf_desc = &phost_conf->desc;
+
+	phost_iface = &usb_intf->altsetting[0];
+	piface_desc = &phost_iface->desc;
+
+	pdvobjpriv->NumInterfaces = pconf_desc->bNumInterfaces;
+	pdvobjpriv->InterfaceNumber = piface_desc->bInterfaceNumber;
+	pdvobjpriv->nr_endpoint = piface_desc->bNumEndpoints;
+
+	for (i = 0; i < pdvobjpriv->nr_endpoint; i++) {
+		phost_endp = phost_iface->endpoint + i;
+		if (phost_endp) {
+			pendp_desc = &phost_endp->desc;
+
+			DBG_88E("\nusb_endpoint_descriptor(%d):\n", i);
+			DBG_88E("bLength=%x\n", pendp_desc->bLength);
+			DBG_88E("bDescriptorType=%x\n",
+				pendp_desc->bDescriptorType);
+			DBG_88E("bEndpointAddress=%x\n",
+				pendp_desc->bEndpointAddress);
+			DBG_88E("wMaxPacketSize=%d\n",
+				le16_to_cpu(pendp_desc->wMaxPacketSize));
+			DBG_88E("bInterval=%x\n", pendp_desc->bInterval);
+
+			if (RT_usb_endpoint_is_bulk_in(pendp_desc)) {
+				DBG_88E("RT_usb_endpoint_is_bulk_in = %x\n",
+					RT_usb_endpoint_num(pendp_desc));
+				pdvobjpriv->RtInPipe[pdvobjpriv->RtNumInPipes] = RT_usb_endpoint_num(pendp_desc);
+				pdvobjpriv->RtNumInPipes++;
+			} else if (usb_endpoint_is_int(pendp_desc)) {
+				DBG_88E("usb_endpoint_is_int = %x, Interval = %x\n",
+					RT_usb_endpoint_num(pendp_desc),
+					pendp_desc->bInterval);
+				pdvobjpriv->RtInPipe[pdvobjpriv->RtNumInPipes] = RT_usb_endpoint_num(pendp_desc);
+				pdvobjpriv->RtNumInPipes++;
+			} else if (RT_usb_endpoint_is_bulk_out(pendp_desc)) {
+				DBG_88E("RT_usb_endpoint_is_bulk_out = %x\n",
+					RT_usb_endpoint_num(pendp_desc));
+				pdvobjpriv->RtOutPipe[pdvobjpriv->RtNumOutPipes] = RT_usb_endpoint_num(pendp_desc);
+				pdvobjpriv->RtNumOutPipes++;
+			}
+			pdvobjpriv->ep_num[i] = RT_usb_endpoint_num(pendp_desc);
+		}
+	}
+
+	DBG_88E("nr_endpoint=%d, in_num=%d, out_num=%d\n\n",
+		pdvobjpriv->nr_endpoint, pdvobjpriv->RtNumInPipes,
+		pdvobjpriv->RtNumOutPipes);
+
+	if (pusbd->speed == USB_SPEED_HIGH) {
+		pdvobjpriv->ishighspeed = true;
+		DBG_88E("USB_SPEED_HIGH\n");
+	} else {
+		pdvobjpriv->ishighspeed = false;
+		DBG_88E("NON USB_SPEED_HIGH\n");
+	}
+
+	if (rtw_init_intf_priv(pdvobjpriv) == _FAIL) {
+		RT_TRACE(_module_os_intfs_c_, _drv_err_,
+			 ("\n Can't INIT rtw_init_intf_priv\n"));
+		goto free_dvobj;
+	}
+
+	/* 3 misc */
+	_rtw_init_sema(&(pdvobjpriv->usb_suspend_sema), 0);
+	rtw_reset_continual_urb_error(pdvobjpriv);
+
+	usb_get_dev(pusbd);
+
+	status = _SUCCESS;
+
+free_dvobj:
+	if (status != _SUCCESS && pdvobjpriv) {
+		usb_set_intfdata(usb_intf, NULL);
+		kfree(pdvobjpriv);
+		pdvobjpriv = NULL;
+	}
+exit:
+_func_exit_;
+	return pdvobjpriv;
+}
+
+static void usb_dvobj_deinit(struct usb_interface *usb_intf)
+{
+	struct dvobj_priv *dvobj = usb_get_intfdata(usb_intf);
+
+_func_enter_;
+
+	usb_set_intfdata(usb_intf, NULL);
+	if (dvobj) {
+		/* Modify condition for 92DU DMDP 2010.11.18, by Thomas */
+		if ((dvobj->NumInterfaces != 2 &&
+		    dvobj->NumInterfaces != 3) ||
+		    (dvobj->InterfaceNumber == 1)) {
+			if (interface_to_usbdev(usb_intf)->state !=
+			    USB_STATE_NOTATTACHED) {
+				/* If we didn't unplug usb dongle and
+				 * remove/insert module, driver fails
+				 * on sitesurvey for the first time when
+				 * device is up . Reset usb port for sitesurvey
+				 * fail issue. */
+				DBG_88E("usb attached..., try to reset usb device\n");
+				usb_reset_device(interface_to_usbdev(usb_intf));
+			}
+		}
+		rtw_deinit_intf_priv(dvobj);
+		kfree(dvobj);
+	}
+
+	usb_put_dev(interface_to_usbdev(usb_intf));
+
+_func_exit_;
+}
+
+static void chip_by_usb_id(struct adapter *padapter,
+			   const struct usb_device_id *pdid)
+{
+	padapter->chip_type = NULL_CHIP_TYPE;
+	hal_set_hw_type(padapter);
+}
+
+static void usb_intf_start(struct adapter *padapter)
+{
+	RT_TRACE(_module_hci_intfs_c_, _drv_err_, ("+usb_intf_start\n"));
+
+	rtw_hal_inirp_init(padapter);
+
+	RT_TRACE(_module_hci_intfs_c_, _drv_err_, ("-usb_intf_start\n"));
+}
+
+static void usb_intf_stop(struct adapter *padapter)
+{
+	RT_TRACE(_module_hci_intfs_c_, _drv_err_, ("+usb_intf_stop\n"));
+
+	/* disabel_hw_interrupt */
+	if (!padapter->bSurpriseRemoved) {
+		/* device still exists, so driver can do i/o operation */
+		/* TODO: */
+		RT_TRACE(_module_hci_intfs_c_, _drv_err_,
+			 ("SurpriseRemoved == false\n"));
+	}
+
+	/* cancel in irp */
+	rtw_hal_inirp_deinit(padapter);
+
+	/* cancel out irp */
+	rtw_write_port_cancel(padapter);
+
+	/* todo:cancel other irps */
+
+	RT_TRACE(_module_hci_intfs_c_, _drv_err_, ("-usb_intf_stop\n"));
+}
+
+static void rtw_dev_unload(struct adapter *padapter)
+{
+	RT_TRACE(_module_hci_intfs_c_, _drv_err_, ("+rtw_dev_unload\n"));
+
+	if (padapter->bup) {
+		DBG_88E("===> rtw_dev_unload\n");
+		padapter->bDriverStopped = true;
+		if (padapter->xmitpriv.ack_tx)
+			rtw_ack_tx_done(&padapter->xmitpriv, RTW_SCTX_DONE_DRV_STOP);
+		/* s3. */
+		if (padapter->intf_stop)
+			padapter->intf_stop(padapter);
+		/* s4. */
+		if (!padapter->pwrctrlpriv.bInternalAutoSuspend)
+			rtw_stop_drv_threads(padapter);
+
+		/* s5. */
+		if (!padapter->bSurpriseRemoved) {
+			rtw_hal_deinit(padapter);
+			padapter->bSurpriseRemoved = true;
+		}
+
+		padapter->bup = false;
+	} else {
+		RT_TRACE(_module_hci_intfs_c_, _drv_err_,
+			 ("r871x_dev_unload():padapter->bup == false\n"));
+	}
+
+	DBG_88E("<=== rtw_dev_unload\n");
+
+	RT_TRACE(_module_hci_intfs_c_, _drv_err_, ("-rtw_dev_unload\n"));
+}
+
+static void process_spec_devid(const struct usb_device_id *pdid)
+{
+	u16 vid, pid;
+	u32 flags;
+	int i;
+	int num = sizeof(specific_device_id_tbl) /
+		  sizeof(struct specific_device_id);
+
+	for (i = 0; i < num; i++) {
+		vid = specific_device_id_tbl[i].idVendor;
+		pid = specific_device_id_tbl[i].idProduct;
+		flags = specific_device_id_tbl[i].flags;
+
+		if ((pdid->idVendor == vid) && (pdid->idProduct == pid) &&
+		    (flags&SPEC_DEV_ID_DISABLE_HT)) {
+			rtw_ht_enable = 0;
+			rtw_cbw40_enable = 0;
+			rtw_ampdu_enable = 0;
+		}
+	}
+}
+
+int rtw_hw_suspend(struct adapter *padapter)
+{
+	struct pwrctrl_priv *pwrpriv = &padapter->pwrctrlpriv;
+	struct net_device *pnetdev = padapter->pnetdev;
+
+	_func_enter_;
+
+	if ((!padapter->bup) || (padapter->bDriverStopped) ||
+	    (padapter->bSurpriseRemoved)) {
+		DBG_88E("padapter->bup=%d bDriverStopped=%d bSurpriseRemoved = %d\n",
+			padapter->bup, padapter->bDriverStopped,
+			padapter->bSurpriseRemoved);
+		goto error_exit;
+	}
+
+	if (padapter) { /* system suspend */
+		LeaveAllPowerSaveMode(padapter);
+
+		DBG_88E("==> rtw_hw_suspend\n");
+		_enter_pwrlock(&pwrpriv->lock);
+		pwrpriv->bips_processing = true;
+		/* s1. */
+		if (pnetdev) {
+			netif_carrier_off(pnetdev);
+			rtw_netif_stop_queue(pnetdev);
+		}
+
+		/* s2. */
+		rtw_disassoc_cmd(padapter, 500, false);
+
+		/* s2-2.  indicate disconnect to os */
+		{
+			struct	mlme_priv *pmlmepriv = &padapter->mlmepriv;
+
+			if (check_fwstate(pmlmepriv, _FW_LINKED)) {
+				_clr_fwstate_(pmlmepriv, _FW_LINKED);
+
+				rtw_led_control(padapter, LED_CTL_NO_LINK);
+
+				rtw_os_indicate_disconnect(padapter);
+
+				/* donnot enqueue cmd */
+				rtw_lps_ctrl_wk_cmd(padapter, LPS_CTRL_DISCONNECT, 0);
+			}
+		}
+		/* s2-3. */
+		rtw_free_assoc_resources(padapter, 1);
+
+		/* s2-4. */
+		rtw_free_network_queue(padapter, true);
+		rtw_ips_dev_unload(padapter);
+		pwrpriv->rf_pwrstate = rf_off;
+		pwrpriv->bips_processing = false;
+
+		_exit_pwrlock(&pwrpriv->lock);
+	} else {
+		goto error_exit;
+	}
+	_func_exit_;
+	return 0;
+
+error_exit:
+	DBG_88E("%s, failed\n", __func__);
+	return -1;
+}
+
+int rtw_hw_resume(struct adapter *padapter)
+{
+	struct pwrctrl_priv *pwrpriv = &padapter->pwrctrlpriv;
+	struct net_device *pnetdev = padapter->pnetdev;
+
+	_func_enter_;
+
+	if (padapter) { /* system resume */
+		DBG_88E("==> rtw_hw_resume\n");
+		_enter_pwrlock(&pwrpriv->lock);
+		pwrpriv->bips_processing = true;
+		rtw_reset_drv_sw(padapter);
+
+		if (pm_netdev_open(pnetdev, false) != 0) {
+			_exit_pwrlock(&pwrpriv->lock);
+			goto error_exit;
+		}
+
+		netif_device_attach(pnetdev);
+		netif_carrier_on(pnetdev);
+
+		if (!netif_queue_stopped(pnetdev))
+			netif_start_queue(pnetdev);
+		else
+			netif_wake_queue(pnetdev);
+
+		pwrpriv->bkeepfwalive = false;
+		pwrpriv->brfoffbyhw = false;
+
+		pwrpriv->rf_pwrstate = rf_on;
+		pwrpriv->bips_processing = false;
+
+		_exit_pwrlock(&pwrpriv->lock);
+	} else {
+		goto error_exit;
+	}
+
+	_func_exit_;
+
+	return 0;
+error_exit:
+	DBG_88E("%s, Open net dev failed\n", __func__);
+	return -1;
+}
+
+static int rtw_suspend(struct usb_interface *pusb_intf, pm_message_t message)
+{
+	struct dvobj_priv *dvobj = usb_get_intfdata(pusb_intf);
+	struct adapter *padapter = dvobj->if1;
+	struct net_device *pnetdev = padapter->pnetdev;
+	struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
+	struct pwrctrl_priv *pwrpriv = &padapter->pwrctrlpriv;
+
+	int ret = 0;
+	u32 start_time = rtw_get_current_time();
+
+	_func_enter_;
+
+	DBG_88E("==> %s (%s:%d)\n", __func__, current->comm, current->pid);
+
+	if ((!padapter->bup) || (padapter->bDriverStopped) ||
+	    (padapter->bSurpriseRemoved)) {
+		DBG_88E("padapter->bup=%d bDriverStopped=%d bSurpriseRemoved = %d\n",
+			padapter->bup, padapter->bDriverStopped,
+			padapter->bSurpriseRemoved);
+		goto exit;
+	}
+
+	pwrpriv->bInSuspend = true;
+	rtw_cancel_all_timer(padapter);
+	LeaveAllPowerSaveMode(padapter);
+
+	_enter_pwrlock(&pwrpriv->lock);
+	/* s1. */
+	if (pnetdev) {
+		netif_carrier_off(pnetdev);
+		rtw_netif_stop_queue(pnetdev);
+	}
+
+	/* s2. */
+	rtw_disassoc_cmd(padapter, 0, false);
+
+	if (check_fwstate(pmlmepriv, WIFI_STATION_STATE) &&
+	    check_fwstate(pmlmepriv, _FW_LINKED)) {
+		DBG_88E("%s:%d %s(%pM), length:%d assoc_ssid.length:%d\n",
+			__func__, __LINE__,
+			pmlmepriv->cur_network.network.Ssid.Ssid,
+			pmlmepriv->cur_network.network.MacAddress,
+			pmlmepriv->cur_network.network.Ssid.SsidLength,
+			pmlmepriv->assoc_ssid.SsidLength);
+
+		pmlmepriv->to_roaming = 1;
+	}
+	/* s2-2.  indicate disconnect to os */
+	rtw_indicate_disconnect(padapter);
+	/* s2-3. */
+	rtw_free_assoc_resources(padapter, 1);
+	/* s2-4. */
+	rtw_free_network_queue(padapter, true);
+
+	rtw_dev_unload(padapter);
+	_exit_pwrlock(&pwrpriv->lock);
+
+	if (check_fwstate(pmlmepriv, _FW_UNDER_SURVEY))
+		rtw_indicate_scan_done(padapter, 1);
+
+	if (check_fwstate(pmlmepriv, _FW_UNDER_LINKING))
+		rtw_indicate_disconnect(padapter);
+
+exit:
+	DBG_88E("<===  %s return %d.............. in %dms\n", __func__
+		, ret, rtw_get_passing_time_ms(start_time));
+
+	_func_exit_;
+	return ret;
+}
+
+static int rtw_resume(struct usb_interface *pusb_intf)
+{
+	struct dvobj_priv *dvobj = usb_get_intfdata(pusb_intf);
+	struct adapter *padapter = dvobj->if1;
+	struct pwrctrl_priv *pwrpriv = &padapter->pwrctrlpriv;
+	 int ret = 0;
+
+	if (pwrpriv->bInternalAutoSuspend)
+		ret = rtw_resume_process(padapter);
+	else
+		ret = rtw_resume_process(padapter);
+	return ret;
+}
+
+int rtw_resume_process(struct adapter *padapter)
+{
+	struct net_device *pnetdev;
+	struct pwrctrl_priv *pwrpriv = NULL;
+	int ret = -1;
+	u32 start_time = rtw_get_current_time();
+	_func_enter_;
+
+	DBG_88E("==> %s (%s:%d)\n", __func__, current->comm, current->pid);
+
+	if (padapter) {
+		pnetdev = padapter->pnetdev;
+		pwrpriv = &padapter->pwrctrlpriv;
+	} else {
+		goto exit;
+	}
+
+	_enter_pwrlock(&pwrpriv->lock);
+	rtw_reset_drv_sw(padapter);
+	if (pwrpriv)
+		pwrpriv->bkeepfwalive = false;
+
+	DBG_88E("bkeepfwalive(%x)\n", pwrpriv->bkeepfwalive);
+	if (pm_netdev_open(pnetdev, true) != 0)
+		goto exit;
+
+	netif_device_attach(pnetdev);
+	netif_carrier_on(pnetdev);
+
+	_exit_pwrlock(&pwrpriv->lock);
+
+	if (padapter->pid[1] != 0) {
+		DBG_88E("pid[1]:%d\n", padapter->pid[1]);
+		rtw_signal_process(padapter->pid[1], SIGUSR2);
+	}
+
+	rtw_roaming(padapter, NULL);
+
+	ret = 0;
+exit:
+	if (pwrpriv)
+		pwrpriv->bInSuspend = false;
+	DBG_88E("<===  %s return %d.............. in %dms\n", __func__,
+		ret, rtw_get_passing_time_ms(start_time));
+
+	_func_exit_;
+
+	return ret;
+}
+
+/*
+ * drv_init() - a device potentially for us
+ *
+ * notes: drv_init() is called when the bus driver has located
+ * a card for us to support.
+ *        We accept the new device by returning 0.
+ */
+
+static struct adapter *rtw_usb_if1_init(struct dvobj_priv *dvobj,
+	struct usb_interface *pusb_intf, const struct usb_device_id *pdid)
+{
+	struct adapter *padapter = NULL;
+	struct net_device *pnetdev = NULL;
+	int status = _FAIL;
+
+	padapter = (struct adapter *)rtw_zvmalloc(sizeof(*padapter));
+	if (padapter == NULL)
+		goto exit;
+	padapter->dvobj = dvobj;
+	dvobj->if1 = padapter;
+
+	padapter->bDriverStopped = true;
+
+	padapter->hw_init_mutex = &usb_drv->hw_init_mutex;
+
+	/* step 1-1., decide the chip_type via vid/pid */
+	padapter->interface_type = RTW_USB;
+	chip_by_usb_id(padapter, pdid);
+
+	if (rtw_handle_dualmac(padapter, 1) != _SUCCESS)
+		goto free_adapter;
+
+	pnetdev = rtw_init_netdev(padapter);
+	if (pnetdev == NULL)
+		goto handle_dualmac;
+	SET_NETDEV_DEV(pnetdev, dvobj_to_dev(dvobj));
+	padapter = rtw_netdev_priv(pnetdev);
+
+	/* step 2. hook HalFunc, allocate HalData */
+	hal_set_hal_ops(padapter);
+
+	padapter->intf_start = &usb_intf_start;
+	padapter->intf_stop = &usb_intf_stop;
+
+	/* step init_io_priv */
+	rtw_init_io_priv(padapter, usb_set_intf_ops);
+
+	/* step read_chip_version */
+	rtw_hal_read_chip_version(padapter);
+
+	/* step usb endpoint mapping */
+	rtw_hal_chip_configure(padapter);
+
+	/* step read efuse/eeprom data and get mac_addr */
+	rtw_hal_read_chip_info(padapter);
+
+	/* step 5. */
+	if (rtw_init_drv_sw(padapter) == _FAIL) {
+		RT_TRACE(_module_hci_intfs_c_, _drv_err_,
+			 ("Initialize driver software resource Failed!\n"));
+		goto free_hal_data;
+	}
+
+#ifdef CONFIG_PM
+	if (padapter->pwrctrlpriv.bSupportRemoteWakeup) {
+		dvobj->pusbdev->do_remote_wakeup = 1;
+		pusb_intf->needs_remote_wakeup = 1;
+		device_init_wakeup(&pusb_intf->dev, 1);
+		DBG_88E("\n  padapter->pwrctrlpriv.bSupportRemoteWakeup~~~~~~\n");
+		DBG_88E("\n  padapter->pwrctrlpriv.bSupportRemoteWakeup~~~[%d]~~~\n",
+			device_may_wakeup(&pusb_intf->dev));
+	}
+#endif
+
+	/* 2012-07-11 Move here to prevent the 8723AS-VAU BT auto
+	 * suspend influence */
+	if (usb_autopm_get_interface(pusb_intf) < 0)
+			DBG_88E("can't get autopm:\n");
+
+	/*  alloc dev name after read efuse. */
+	rtw_init_netdev_name(pnetdev, padapter->registrypriv.ifname);
+	rtw_macaddr_cfg(padapter->eeprompriv.mac_addr);
+#ifdef CONFIG_88EU_P2P
+	rtw_init_wifidirect_addrs(padapter, padapter->eeprompriv.mac_addr,
+				  padapter->eeprompriv.mac_addr);
+#endif
+	memcpy(pnetdev->dev_addr, padapter->eeprompriv.mac_addr, ETH_ALEN);
+	DBG_88E("MAC Address from pnetdev->dev_addr =  %pM\n",
+		pnetdev->dev_addr);
+
+	/* step 6. Tell the network stack we exist */
+	if (register_netdev(pnetdev) != 0) {
+		RT_TRACE(_module_hci_intfs_c_, _drv_err_, ("register_netdev() failed\n"));
+		goto free_hal_data;
+	}
+
+	DBG_88E("bDriverStopped:%d, bSurpriseRemoved:%d, bup:%d, hw_init_completed:%d\n"
+		, padapter->bDriverStopped
+		, padapter->bSurpriseRemoved
+		, padapter->bup
+		, padapter->hw_init_completed
+	);
+
+	status = _SUCCESS;
+
+free_hal_data:
+	if (status != _SUCCESS && padapter->HalData)
+		kfree(padapter->HalData);
+handle_dualmac:
+	if (status != _SUCCESS)
+		rtw_handle_dualmac(padapter, 0);
+free_adapter:
+	if (status != _SUCCESS) {
+		if (pnetdev)
+			rtw_free_netdev(pnetdev);
+		else if (padapter)
+			rtw_vmfree((u8 *)padapter, sizeof(*padapter));
+		padapter = NULL;
+	}
+exit:
+	return padapter;
+}
+
+static void rtw_usb_if1_deinit(struct adapter *if1)
+{
+	struct net_device *pnetdev = if1->pnetdev;
+	struct mlme_priv *pmlmepriv = &if1->mlmepriv;
+
+	if (check_fwstate(pmlmepriv, _FW_LINKED))
+		rtw_disassoc_cmd(if1, 0, false);
+
+#ifdef CONFIG_88EU_AP_MODE
+	free_mlme_ap_info(if1);
+#endif
+
+	if (if1->DriverState != DRIVER_DISAPPEAR) {
+		if (pnetdev) {
+			/* will call netdev_close() */
+			unregister_netdev(pnetdev);
+			rtw_proc_remove_one(pnetdev);
+		}
+	}
+	rtw_cancel_all_timer(if1);
+
+	rtw_dev_unload(if1);
+	DBG_88E("+r871xu_dev_remove, hw_init_completed=%d\n",
+		if1->hw_init_completed);
+	rtw_handle_dualmac(if1, 0);
+	rtw_free_drv_sw(if1);
+	if (pnetdev)
+		rtw_free_netdev(pnetdev);
+}
+
+static int rtw_drv_init(struct usb_interface *pusb_intf, const struct usb_device_id *pdid)
+{
+	struct adapter *if1 = NULL;
+	int status;
+	struct dvobj_priv *dvobj;
+
+	RT_TRACE(_module_hci_intfs_c_, _drv_err_, ("+rtw_drv_init\n"));
+
+	/* step 0. */
+	process_spec_devid(pdid);
+
+	/* Initialize dvobj_priv */
+	dvobj = usb_dvobj_init(pusb_intf);
+	if (dvobj == NULL) {
+		RT_TRACE(_module_hci_intfs_c_, _drv_err_,
+			 ("initialize device object priv Failed!\n"));
+		goto exit;
+	}
+
+	if1 = rtw_usb_if1_init(dvobj, pusb_intf, pdid);
+	if (if1 == NULL) {
+		DBG_88E("rtw_init_primarystruct adapter Failed!\n");
+		goto free_dvobj;
+	}
+
+	if (ui_pid[1] != 0) {
+		DBG_88E("ui_pid[1]:%d\n", ui_pid[1]);
+		rtw_signal_process(ui_pid[1], SIGUSR2);
+	}
+
+	RT_TRACE(_module_hci_intfs_c_, _drv_err_, ("-871x_drv - drv_init, success!\n"));
+
+	status = _SUCCESS;
+
+	if (status != _SUCCESS && if1)
+		rtw_usb_if1_deinit(if1);
+free_dvobj:
+	if (status != _SUCCESS)
+		usb_dvobj_deinit(pusb_intf);
+exit:
+	return status == _SUCCESS ? 0 : -ENODEV;
+}
+
+/*
+ * dev_remove() - our device is being removed
+*/
+/* rmmod module & unplug(SurpriseRemoved) will call r871xu_dev_remove() => how to recognize both */
+static void rtw_dev_remove(struct usb_interface *pusb_intf)
+{
+	struct dvobj_priv *dvobj = usb_get_intfdata(pusb_intf);
+	struct adapter *padapter = dvobj->if1;
+
+_func_enter_;
+
+	DBG_88E("+rtw_dev_remove\n");
+	RT_TRACE(_module_hci_intfs_c_, _drv_err_, ("+dev_remove()\n"));
+
+	if (usb_drv->drv_registered)
+		padapter->bSurpriseRemoved = true;
+
+	rtw_pm_set_ips(padapter, IPS_NONE);
+	rtw_pm_set_lps(padapter, PS_MODE_ACTIVE);
+
+	LeaveAllPowerSaveMode(padapter);
+
+	rtw_usb_if1_deinit(padapter);
+
+	usb_dvobj_deinit(pusb_intf);
+
+	RT_TRACE(_module_hci_intfs_c_, _drv_err_, ("-dev_remove()\n"));
+	DBG_88E("-r871xu_dev_remove, done\n");
+_func_exit_;
+
+	return;
+}
+
+static int __init rtw_drv_entry(void)
+{
+	RT_TRACE(_module_hci_intfs_c_, _drv_err_, ("+rtw_drv_entry\n"));
+
+	DBG_88E(DRV_NAME " driver version=%s\n", DRIVERVERSION);
+	DBG_88E("build time: %s %s\n", __DATE__, __TIME__);
+
+	rtw_suspend_lock_init();
+
+	_rtw_mutex_init(&usb_drv->hw_init_mutex);
+
+	usb_drv->drv_registered = true;
+	return usb_register(&usb_drv->usbdrv);
+}
+
+static void __exit rtw_drv_halt(void)
+{
+	RT_TRACE(_module_hci_intfs_c_, _drv_err_, ("+rtw_drv_halt\n"));
+	DBG_88E("+rtw_drv_halt\n");
+
+	rtw_suspend_lock_uninit();
+
+	usb_drv->drv_registered = false;
+	usb_deregister(&usb_drv->usbdrv);
+
+	_rtw_mutex_free(&usb_drv->hw_init_mutex);
+	DBG_88E("-rtw_drv_halt\n");
+}
+
+module_init(rtw_drv_entry);
+module_exit(rtw_drv_halt);
diff --git a/drivers/staging/rtl8188eu/os_dep/usb_ops_linux.c b/drivers/staging/rtl8188eu/os_dep/usb_ops_linux.c
new file mode 100644
index 0000000..4c71e3b
--- /dev/null
+++ b/drivers/staging/rtl8188eu/os_dep/usb_ops_linux.c
@@ -0,0 +1,288 @@
+/******************************************************************************
+ *
+ * Copyright(c) 2007 - 2012 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 _USB_OPS_LINUX_C_
+
+#include <drv_types.h>
+#include <usb_ops_linux.h>
+#include <rtw_sreset.h>
+
+unsigned int ffaddr2pipehdl(struct dvobj_priv *pdvobj, u32 addr)
+{
+	unsigned int pipe = 0, ep_num = 0;
+	struct usb_device *pusbd = pdvobj->pusbdev;
+
+	if (addr == RECV_BULK_IN_ADDR) {
+		pipe = usb_rcvbulkpipe(pusbd, pdvobj->RtInPipe[0]);
+	} else if (addr == RECV_INT_IN_ADDR) {
+		pipe = usb_rcvbulkpipe(pusbd, pdvobj->RtInPipe[1]);
+	} else if (addr < HW_QUEUE_ENTRY) {
+		ep_num = pdvobj->Queue2Pipe[addr];
+		pipe = usb_sndbulkpipe(pusbd, ep_num);
+	}
+
+	return pipe;
+}
+
+struct zero_bulkout_context {
+	void *pbuf;
+	void *purb;
+	void *pirp;
+	void *padapter;
+};
+
+void usb_read_mem(struct intf_hdl *pintfhdl, u32 addr, u32 cnt, u8 *rmem)
+{
+}
+
+void usb_write_mem(struct intf_hdl *pintfhdl, u32 addr, u32 cnt, u8 *wmem)
+{
+}
+
+void usb_read_port_cancel(struct intf_hdl *pintfhdl)
+{
+	int i;
+	struct recv_buf *precvbuf;
+	struct adapter	*padapter = pintfhdl->padapter;
+	precvbuf = (struct recv_buf *)padapter->recvpriv.precv_buf;
+
+	DBG_88E("%s\n", __func__);
+
+	padapter->bReadPortCancel = true;
+
+	for (i = 0; i < NR_RECVBUFF; i++) {
+		precvbuf->reuse = true;
+		if (precvbuf->purb)
+			usb_kill_urb(precvbuf->purb);
+		precvbuf++;
+	}
+}
+
+static void usb_write_port_complete(struct urb *purb, struct pt_regs *regs)
+{
+	struct xmit_buf *pxmitbuf = (struct xmit_buf *)purb->context;
+	struct adapter	*padapter = pxmitbuf->padapter;
+	struct xmit_priv	*pxmitpriv = &padapter->xmitpriv;
+	struct hal_data_8188e	*haldata;
+
+_func_enter_;
+
+	switch (pxmitbuf->flags) {
+	case VO_QUEUE_INX:
+		pxmitpriv->voq_cnt--;
+		break;
+	case VI_QUEUE_INX:
+		pxmitpriv->viq_cnt--;
+		break;
+	case BE_QUEUE_INX:
+		pxmitpriv->beq_cnt--;
+		break;
+	case BK_QUEUE_INX:
+		pxmitpriv->bkq_cnt--;
+		break;
+	case HIGH_QUEUE_INX:
+#ifdef CONFIG_88EU_AP_MODE
+		rtw_chk_hi_queue_cmd(padapter);
+#endif
+		break;
+	default:
+		break;
+	}
+
+	if (padapter->bSurpriseRemoved || padapter->bDriverStopped ||
+	    padapter->bWritePortCancel) {
+		RT_TRACE(_module_hci_ops_os_c_, _drv_err_,
+			 ("usb_write_port_complete:bDriverStopped(%d) OR bSurpriseRemoved(%d)",
+			 padapter->bDriverStopped, padapter->bSurpriseRemoved));
+		DBG_88E("%s(): TX Warning! bDriverStopped(%d) OR bSurpriseRemoved(%d) bWritePortCancel(%d) pxmitbuf->ext_tag(%x)\n",
+			__func__, padapter->bDriverStopped,
+			padapter->bSurpriseRemoved, padapter->bReadPortCancel,
+			pxmitbuf->ext_tag);
+
+		goto check_completion;
+	}
+
+	if (purb->status) {
+		RT_TRACE(_module_hci_ops_os_c_, _drv_err_, ("usb_write_port_complete : purb->status(%d) != 0\n", purb->status));
+		DBG_88E("###=> urb_write_port_complete status(%d)\n", purb->status);
+		if ((purb->status == -EPIPE) || (purb->status == -EPROTO)) {
+			sreset_set_wifi_error_status(padapter, USB_WRITE_PORT_FAIL);
+		} else if (purb->status == -EINPROGRESS) {
+			RT_TRACE(_module_hci_ops_os_c_, _drv_err_, ("usb_write_port_complete: EINPROGESS\n"));
+			goto check_completion;
+		} else if (purb->status == -ENOENT) {
+			DBG_88E("%s: -ENOENT\n", __func__);
+			goto check_completion;
+		} else if (purb->status == -ECONNRESET) {
+			DBG_88E("%s: -ECONNRESET\n", __func__);
+			goto check_completion;
+		} else if (purb->status == -ESHUTDOWN) {
+			RT_TRACE(_module_hci_ops_os_c_, _drv_err_, ("usb_write_port_complete: ESHUTDOWN\n"));
+			padapter->bDriverStopped = true;
+			RT_TRACE(_module_hci_ops_os_c_, _drv_err_, ("usb_write_port_complete:bDriverStopped = true\n"));
+			goto check_completion;
+		} else {
+			padapter->bSurpriseRemoved = true;
+			DBG_88E("bSurpriseRemoved = true\n");
+			RT_TRACE(_module_hci_ops_os_c_, _drv_err_, ("usb_write_port_complete:bSurpriseRemoved = true\n"));
+
+			goto check_completion;
+		}
+	}
+
+	haldata = GET_HAL_DATA(padapter);
+	haldata->srestpriv.last_tx_complete_time = rtw_get_current_time();
+
+check_completion:
+	rtw_sctx_done_err(&pxmitbuf->sctx,
+			  purb->status ? RTW_SCTX_DONE_WRITE_PORT_ERR :
+			  RTW_SCTX_DONE_SUCCESS);
+
+	rtw_free_xmitbuf(pxmitpriv, pxmitbuf);
+
+	tasklet_hi_schedule(&pxmitpriv->xmit_tasklet);
+
+_func_exit_;
+}
+
+u32 usb_write_port(struct intf_hdl *pintfhdl, u32 addr, u32 cnt, u8 *wmem)
+{
+	unsigned long irqL;
+	unsigned int pipe;
+	int status;
+	u32 ret = _FAIL;
+	struct urb *purb = NULL;
+	struct adapter *padapter = (struct adapter *)pintfhdl->padapter;
+	struct dvobj_priv	*pdvobj = adapter_to_dvobj(padapter);
+	struct xmit_priv	*pxmitpriv = &padapter->xmitpriv;
+	struct xmit_buf *pxmitbuf = (struct xmit_buf *)wmem;
+	struct xmit_frame *pxmitframe = (struct xmit_frame *)pxmitbuf->priv_data;
+	struct usb_device *pusbd = pdvobj->pusbdev;
+
+_func_enter_;
+
+	RT_TRACE(_module_hci_ops_os_c_, _drv_err_, ("+usb_write_port\n"));
+
+	if ((padapter->bDriverStopped) || (padapter->bSurpriseRemoved) ||
+	    (padapter->pwrctrlpriv.pnp_bstop_trx)) {
+		RT_TRACE(_module_hci_ops_os_c_, _drv_err_,
+			 ("usb_write_port:( padapter->bDriverStopped ||padapter->bSurpriseRemoved ||adapter->pwrctrlpriv.pnp_bstop_trx)!!!\n"));
+		rtw_sctx_done_err(&pxmitbuf->sctx, RTW_SCTX_DONE_TX_DENY);
+		goto exit;
+	}
+
+	_enter_critical(&pxmitpriv->lock, &irqL);
+
+	switch (addr) {
+	case VO_QUEUE_INX:
+		pxmitpriv->voq_cnt++;
+		pxmitbuf->flags = VO_QUEUE_INX;
+		break;
+	case VI_QUEUE_INX:
+		pxmitpriv->viq_cnt++;
+		pxmitbuf->flags = VI_QUEUE_INX;
+		break;
+	case BE_QUEUE_INX:
+		pxmitpriv->beq_cnt++;
+		pxmitbuf->flags = BE_QUEUE_INX;
+		break;
+	case BK_QUEUE_INX:
+		pxmitpriv->bkq_cnt++;
+		pxmitbuf->flags = BK_QUEUE_INX;
+		break;
+	case HIGH_QUEUE_INX:
+		pxmitbuf->flags = HIGH_QUEUE_INX;
+		break;
+	default:
+		pxmitbuf->flags = MGT_QUEUE_INX;
+		break;
+	}
+
+	_exit_critical(&pxmitpriv->lock, &irqL);
+
+	purb	= pxmitbuf->pxmit_urb[0];
+
+	/* translate DMA FIFO addr to pipehandle */
+	pipe = ffaddr2pipehdl(pdvobj, addr);
+
+	usb_fill_bulk_urb(purb, pusbd, pipe,
+			  pxmitframe->buf_addr, /*  pxmitbuf->pbuf */
+			  cnt,
+			  usb_write_port_complete,
+			  pxmitbuf);/* context is pxmitbuf */
+
+	status = usb_submit_urb(purb, GFP_ATOMIC);
+	if (!status) {
+		struct hal_data_8188e	*haldata = GET_HAL_DATA(padapter);
+
+		haldata->srestpriv.last_tx_time = rtw_get_current_time();
+	} else {
+		rtw_sctx_done_err(&pxmitbuf->sctx, RTW_SCTX_DONE_WRITE_PORT_ERR);
+		DBG_88E("usb_write_port, status =%d\n", status);
+		RT_TRACE(_module_hci_ops_os_c_, _drv_err_, ("usb_write_port(): usb_submit_urb, status =%x\n", status));
+
+		switch (status) {
+		case -ENODEV:
+			padapter->bDriverStopped = true;
+			break;
+		default:
+			break;
+		}
+		goto exit;
+	}
+
+	ret = _SUCCESS;
+
+/*    We add the URB_ZERO_PACKET flag to urb so that the host will send the zero packet automatically. */
+
+	RT_TRACE(_module_hci_ops_os_c_, _drv_err_, ("-usb_write_port\n"));
+
+exit:
+	if (ret != _SUCCESS)
+		rtw_free_xmitbuf(pxmitpriv, pxmitbuf);
+_func_exit_;
+	return ret;
+}
+
+void usb_write_port_cancel(struct intf_hdl *pintfhdl)
+{
+	int i, j;
+	struct adapter	*padapter = pintfhdl->padapter;
+	struct xmit_buf *pxmitbuf = (struct xmit_buf *)padapter->xmitpriv.pxmitbuf;
+
+	DBG_88E("%s\n", __func__);
+
+	padapter->bWritePortCancel = true;
+
+	for (i = 0; i < NR_XMITBUFF; i++) {
+		for (j = 0; j < 8; j++) {
+			if (pxmitbuf->pxmit_urb[j])
+				usb_kill_urb(pxmitbuf->pxmit_urb[j]);
+		}
+		pxmitbuf++;
+	}
+
+	pxmitbuf = (struct xmit_buf *)padapter->xmitpriv.pxmit_extbuf;
+	for (i = 0; i < NR_XMIT_EXTBUFF; i++) {
+		for (j = 0; j < 8; j++) {
+			if (pxmitbuf->pxmit_urb[j])
+				usb_kill_urb(pxmitbuf->pxmit_urb[j]);
+		}
+		pxmitbuf++;
+	}
+}
diff --git a/drivers/staging/rtl8188eu/os_dep/xmit_linux.c b/drivers/staging/rtl8188eu/os_dep/xmit_linux.c
new file mode 100644
index 0000000..1e2c8ab
--- /dev/null
+++ b/drivers/staging/rtl8188eu/os_dep/xmit_linux.c
@@ -0,0 +1,289 @@
+/******************************************************************************
+ *
+ * Copyright(c) 2007 - 2012 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 _XMIT_OSDEP_C_
+
+#include <osdep_service.h>
+#include <drv_types.h>
+
+#include <if_ether.h>
+#include <ip.h>
+#include <wifi.h>
+#include <mlme_osdep.h>
+#include <xmit_osdep.h>
+#include <osdep_intf.h>
+#include <usb_osintf.h>
+
+uint rtw_remainder_len(struct pkt_file *pfile)
+{
+	return pfile->buf_len - ((size_t)(pfile->cur_addr) -
+	       (size_t)(pfile->buf_start));
+}
+
+void _rtw_open_pktfile(struct sk_buff *pktptr, struct pkt_file *pfile)
+{
+_func_enter_;
+
+	pfile->pkt = pktptr;
+	pfile->cur_addr = pktptr->data;
+	pfile->buf_start = pktptr->data;
+	pfile->pkt_len = pktptr->len;
+	pfile->buf_len = pktptr->len;
+
+	pfile->cur_buffer = pfile->buf_start;
+
+_func_exit_;
+}
+
+uint _rtw_pktfile_read (struct pkt_file *pfile, u8 *rmem, uint rlen)
+{
+	uint	len = 0;
+
+_func_enter_;
+
+	len =  rtw_remainder_len(pfile);
+	len = (rlen > len) ? len : rlen;
+
+	if (rmem)
+		skb_copy_bits(pfile->pkt, pfile->buf_len-pfile->pkt_len, rmem, len);
+
+	pfile->cur_addr += len;
+	pfile->pkt_len -= len;
+
+_func_exit_;
+
+	return len;
+}
+
+int rtw_endofpktfile(struct pkt_file *pfile)
+{
+_func_enter_;
+
+	if (pfile->pkt_len == 0) {
+	_func_exit_;
+		return true;
+	}
+
+_func_exit_;
+
+	return false;
+}
+
+void rtw_set_tx_chksum_offload(struct sk_buff *pkt, struct pkt_attrib *pattrib)
+{
+}
+
+int rtw_os_xmit_resource_alloc(struct adapter *padapter, struct xmit_buf *pxmitbuf, u32 alloc_sz)
+{
+	int i;
+
+	pxmitbuf->pallocated_buf = rtw_zmalloc(alloc_sz);
+	if (pxmitbuf->pallocated_buf == NULL)
+		return _FAIL;
+
+	pxmitbuf->pbuf = (u8 *)N_BYTE_ALIGMENT((size_t)(pxmitbuf->pallocated_buf), XMITBUF_ALIGN_SZ);
+	pxmitbuf->dma_transfer_addr = 0;
+
+	for (i = 0; i < 8; i++) {
+		pxmitbuf->pxmit_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
+		if (pxmitbuf->pxmit_urb[i] == NULL) {
+			DBG_88E("pxmitbuf->pxmit_urb[i]==NULL");
+			return _FAIL;
+		}
+	}
+	return _SUCCESS;
+}
+
+void rtw_os_xmit_resource_free(struct adapter *padapter,
+			       struct xmit_buf *pxmitbuf, u32 free_sz)
+{
+	int i;
+
+	for (i = 0; i < 8; i++)
+		usb_free_urb(pxmitbuf->pxmit_urb[i]);
+
+	kfree(pxmitbuf->pallocated_buf);
+}
+
+#define WMM_XMIT_THRESHOLD	(NR_XMITFRAME*2/5)
+
+void rtw_os_pkt_complete(struct adapter *padapter, struct sk_buff *pkt)
+{
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 35))
+	u16	queue;
+	struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
+
+	queue = skb_get_queue_mapping(pkt);
+	if (padapter->registrypriv.wifi_spec) {
+		if (__netif_subqueue_stopped(padapter->pnetdev, queue) &&
+		    (pxmitpriv->hwxmits[queue].accnt < WMM_XMIT_THRESHOLD))
+			netif_wake_subqueue(padapter->pnetdev, queue);
+	} else {
+		if (__netif_subqueue_stopped(padapter->pnetdev, queue))
+			netif_wake_subqueue(padapter->pnetdev, queue);
+	}
+#else
+	if (netif_queue_stopped(padapter->pnetdev))
+		netif_wake_queue(padapter->pnetdev);
+#endif
+
+	dev_kfree_skb_any(pkt);
+}
+
+void rtw_os_xmit_complete(struct adapter *padapter, struct xmit_frame *pxframe)
+{
+	if (pxframe->pkt)
+		rtw_os_pkt_complete(padapter, pxframe->pkt);
+	pxframe->pkt = NULL;
+}
+
+void rtw_os_xmit_schedule(struct adapter *padapter)
+{
+	unsigned long  irql;
+	struct xmit_priv *pxmitpriv;
+
+	if (!padapter)
+		return;
+
+	pxmitpriv = &padapter->xmitpriv;
+
+	_enter_critical_bh(&pxmitpriv->lock, &irql);
+
+	if (rtw_txframes_pending(padapter))
+		tasklet_hi_schedule(&pxmitpriv->xmit_tasklet);
+
+	_exit_critical_bh(&pxmitpriv->lock, &irql);
+}
+
+static void rtw_check_xmit_resource(struct adapter *padapter, struct sk_buff *pkt)
+{
+	struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
+	u16	queue;
+
+	queue = skb_get_queue_mapping(pkt);
+	if (padapter->registrypriv.wifi_spec) {
+		/* No free space for Tx, tx_worker is too slow */
+		if (pxmitpriv->hwxmits[queue].accnt > WMM_XMIT_THRESHOLD)
+			netif_stop_subqueue(padapter->pnetdev, queue);
+	} else {
+		if (pxmitpriv->free_xmitframe_cnt <= 4) {
+			if (!netif_tx_queue_stopped(netdev_get_tx_queue(padapter->pnetdev, queue)))
+				netif_stop_subqueue(padapter->pnetdev, queue);
+		}
+	}
+}
+
+static int rtw_mlcst2unicst(struct adapter *padapter, struct sk_buff *skb)
+{
+	struct	sta_priv *pstapriv = &padapter->stapriv;
+	struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
+	unsigned long	irql;
+	struct list_head *phead, *plist;
+	struct sk_buff *newskb;
+	struct sta_info *psta = NULL;
+	s32	res;
+
+	_enter_critical_bh(&pstapriv->asoc_list_lock, &irql);
+	phead = &pstapriv->asoc_list;
+	plist = get_next(phead);
+
+	/* free sta asoc_queue */
+	while (!rtw_end_of_queue_search(phead, plist)) {
+		psta = LIST_CONTAINOR(plist, struct sta_info, asoc_list);
+
+		plist = get_next(plist);
+
+		/* avoid   come from STA1 and send back STA1 */
+		if (!memcmp(psta->hwaddr, &skb->data[6], 6))
+			continue;
+
+		newskb = skb_copy(skb, GFP_ATOMIC);
+
+		if (newskb) {
+			memcpy(newskb->data, psta->hwaddr, 6);
+			res = rtw_xmit(padapter, &newskb);
+			if (res < 0) {
+				DBG_88E("%s()-%d: rtw_xmit() return error!\n", __func__, __LINE__);
+				pxmitpriv->tx_drop++;
+				dev_kfree_skb_any(newskb);
+			} else {
+				pxmitpriv->tx_pkts++;
+			}
+		} else {
+			DBG_88E("%s-%d: skb_copy() failed!\n", __func__, __LINE__);
+			pxmitpriv->tx_drop++;
+
+			_exit_critical_bh(&pstapriv->asoc_list_lock, &irql);
+			return false;	/*  Caller shall tx this multicast frame via normal way. */
+		}
+	}
+
+	_exit_critical_bh(&pstapriv->asoc_list_lock, &irql);
+	dev_kfree_skb_any(skb);
+	return true;
+}
+
+
+int rtw_xmit_entry(struct sk_buff *pkt, struct  net_device *pnetdev)
+{
+	struct adapter *padapter = (struct adapter *)rtw_netdev_priv(pnetdev);
+	struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
+	struct mlme_priv	*pmlmepriv = &padapter->mlmepriv;
+	s32 res = 0;
+
+_func_enter_;
+
+	RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_, ("+xmit_enry\n"));
+
+	if (rtw_if_up(padapter) == false) {
+		RT_TRACE(_module_xmit_osdep_c_, _drv_err_, ("rtw_xmit_entry: rtw_if_up fail\n"));
+		goto drop_packet;
+	}
+
+	rtw_check_xmit_resource(padapter, pkt);
+
+	if (!rtw_mc2u_disable && check_fwstate(pmlmepriv, WIFI_AP_STATE) &&
+	    (IP_MCAST_MAC(pkt->data) || ICMPV6_MCAST_MAC(pkt->data)) &&
+	    (padapter->registrypriv.wifi_spec == 0)) {
+		if (pxmitpriv->free_xmitframe_cnt > (NR_XMITFRAME/4)) {
+			res = rtw_mlcst2unicst(padapter, pkt);
+			if (res)
+				goto exit;
+		}
+	}
+
+	res = rtw_xmit(padapter, &pkt);
+	if (res < 0)
+		goto drop_packet;
+
+	pxmitpriv->tx_pkts++;
+	RT_TRACE(_module_xmit_osdep_c_, _drv_info_, ("rtw_xmit_entry: tx_pkts=%d\n", (u32)pxmitpriv->tx_pkts));
+	goto exit;
+
+drop_packet:
+	pxmitpriv->tx_drop++;
+	dev_kfree_skb_any(pkt);
+	RT_TRACE(_module_xmit_osdep_c_, _drv_notice_, ("rtw_xmit_entry: drop, tx_drop=%d\n", (u32)pxmitpriv->tx_drop));
+
+exit:
+
+_func_exit_;
+
+	return 0;
+}