1 /******************************************************************************
2  *
3  * Copyright(c) 2009-2012  Realtek Corporation. All rights reserved.
4  *
5  * This program is free software; you can redistribute it and/or modify it
6  * under the terms of version 2 of the GNU General Public License as
7  * published by the Free Software Foundation.
8  *
9  * This program is distributed in the hope that it will be useful, but WITHOUT
10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
12  * more details.
13  *
14  * The full GNU General Public License is included in this distribution in the
15  * file called LICENSE.
16  *
17  * Contact Information:
18  * wlanfae <wlanfae@realtek.com>
19  * Realtek Corporation, No. 2, Innovation Road II, Hsinchu Science Park,
20  * Hsinchu 300, Taiwan.
21  *
22  *****************************************************************************/
23 
24 #include "wifi.h"
25 #include "core.h"
26 #include "usb.h"
27 #include "base.h"
28 #include "ps.h"
29 #include "rtl8192c/fw_common.h"
30 #include <linux/export.h>
31 #include <linux/module.h>
32 
33 MODULE_AUTHOR("lizhaoming	<chaoming_li@realsil.com.cn>");
34 MODULE_AUTHOR("Realtek WlanFAE	<wlanfae@realtek.com>");
35 MODULE_AUTHOR("Larry Finger	<Larry.FInger@lwfinger.net>");
36 MODULE_LICENSE("GPL");
37 MODULE_DESCRIPTION("USB basic driver for rtlwifi");
38 
39 #define	REALTEK_USB_VENQT_READ			0xC0
40 #define	REALTEK_USB_VENQT_WRITE			0x40
41 #define REALTEK_USB_VENQT_CMD_REQ		0x05
42 #define	REALTEK_USB_VENQT_CMD_IDX		0x00
43 
44 #define MAX_USBCTRL_VENDORREQ_TIMES		10
45 
46 static void usbctrl_async_callback(struct urb *urb)
47 {
48 	if (urb) {
49 		/* free dr */
50 		kfree(urb->setup_packet);
51 		/* free databuf */
52 		kfree(urb->transfer_buffer);
53 	}
54 }
55 
56 static int _usbctrl_vendorreq_async_write(struct usb_device *udev, u8 request,
57 					  u16 value, u16 index, void *pdata,
58 					  u16 len)
59 {
60 	int rc;
61 	unsigned int pipe;
62 	u8 reqtype;
63 	struct usb_ctrlrequest *dr;
64 	struct urb *urb;
65 	const u16 databuf_maxlen = REALTEK_USB_VENQT_MAX_BUF_SIZE;
66 	u8 *databuf;
67 
68 	if (WARN_ON_ONCE(len > databuf_maxlen))
69 		len = databuf_maxlen;
70 
71 	pipe = usb_sndctrlpipe(udev, 0); /* write_out */
72 	reqtype =  REALTEK_USB_VENQT_WRITE;
73 
74 	dr = kzalloc(sizeof(*dr), GFP_ATOMIC);
75 	if (!dr)
76 		return -ENOMEM;
77 
78 	databuf = kzalloc(databuf_maxlen, GFP_ATOMIC);
79 	if (!databuf) {
80 		kfree(dr);
81 		return -ENOMEM;
82 	}
83 
84 	urb = usb_alloc_urb(0, GFP_ATOMIC);
85 	if (!urb) {
86 		kfree(databuf);
87 		kfree(dr);
88 		return -ENOMEM;
89 	}
90 
91 	dr->bRequestType = reqtype;
92 	dr->bRequest = request;
93 	dr->wValue = cpu_to_le16(value);
94 	dr->wIndex = cpu_to_le16(index);
95 	dr->wLength = cpu_to_le16(len);
96 	/* data are already in little-endian order */
97 	memcpy(databuf, pdata, len);
98 	usb_fill_control_urb(urb, udev, pipe,
99 			     (unsigned char *)dr, databuf, len,
100 			     usbctrl_async_callback, NULL);
101 	rc = usb_submit_urb(urb, GFP_ATOMIC);
102 	if (rc < 0) {
103 		kfree(databuf);
104 		kfree(dr);
105 	}
106 	usb_free_urb(urb);
107 	return rc;
108 }
109 
110 static int _usbctrl_vendorreq_sync_read(struct usb_device *udev, u8 request,
111 					u16 value, u16 index, void *pdata,
112 					u16 len)
113 {
114 	unsigned int pipe;
115 	int status;
116 	u8 reqtype;
117 	int vendorreq_times = 0;
118 	static int count;
119 
120 	pipe = usb_rcvctrlpipe(udev, 0); /* read_in */
121 	reqtype =  REALTEK_USB_VENQT_READ;
122 
123 	do {
124 		status = usb_control_msg(udev, pipe, request, reqtype, value,
125 					 index, pdata, len, 1000);
126 		if (status < 0) {
127 			/* firmware download is checksumed, don't retry */
128 			if ((value >= FW_8192C_START_ADDRESS &&
129 			    value <= FW_8192C_END_ADDRESS))
130 				break;
131 		} else {
132 			break;
133 		}
134 	} while (++vendorreq_times < MAX_USBCTRL_VENDORREQ_TIMES);
135 
136 	if (status < 0 && count++ < 4)
137 		pr_err("reg 0x%x, usbctrl_vendorreq TimeOut! status:0x%x value=0x%x\n",
138 		       value, status, *(u32 *)pdata);
139 	return status;
140 }
141 
142 static u32 _usb_read_sync(struct rtl_priv *rtlpriv, u32 addr, u16 len)
143 {
144 	struct device *dev = rtlpriv->io.dev;
145 	struct usb_device *udev = to_usb_device(dev);
146 	u8 request;
147 	u16 wvalue;
148 	u16 index;
149 	__le32 *data;
150 	unsigned long flags;
151 
152 	spin_lock_irqsave(&rtlpriv->locks.usb_lock, flags);
153 	if (++rtlpriv->usb_data_index >= RTL_USB_MAX_RX_COUNT)
154 		rtlpriv->usb_data_index = 0;
155 	data = &rtlpriv->usb_data[rtlpriv->usb_data_index];
156 	spin_unlock_irqrestore(&rtlpriv->locks.usb_lock, flags);
157 	request = REALTEK_USB_VENQT_CMD_REQ;
158 	index = REALTEK_USB_VENQT_CMD_IDX; /* n/a */
159 
160 	wvalue = (u16)addr;
161 	_usbctrl_vendorreq_sync_read(udev, request, wvalue, index, data, len);
162 	return le32_to_cpu(*data);
163 }
164 
165 static u8 _usb_read8_sync(struct rtl_priv *rtlpriv, u32 addr)
166 {
167 	return (u8)_usb_read_sync(rtlpriv, addr, 1);
168 }
169 
170 static u16 _usb_read16_sync(struct rtl_priv *rtlpriv, u32 addr)
171 {
172 	return (u16)_usb_read_sync(rtlpriv, addr, 2);
173 }
174 
175 static u32 _usb_read32_sync(struct rtl_priv *rtlpriv, u32 addr)
176 {
177 	return _usb_read_sync(rtlpriv, addr, 4);
178 }
179 
180 static void _usb_write_async(struct usb_device *udev, u32 addr, u32 val,
181 			     u16 len)
182 {
183 	u8 request;
184 	u16 wvalue;
185 	u16 index;
186 	__le32 data;
187 
188 	request = REALTEK_USB_VENQT_CMD_REQ;
189 	index = REALTEK_USB_VENQT_CMD_IDX; /* n/a */
190 	wvalue = (u16)(addr&0x0000ffff);
191 	data = cpu_to_le32(val);
192 	_usbctrl_vendorreq_async_write(udev, request, wvalue, index, &data,
193 				       len);
194 }
195 
196 static void _usb_write8_async(struct rtl_priv *rtlpriv, u32 addr, u8 val)
197 {
198 	struct device *dev = rtlpriv->io.dev;
199 
200 	_usb_write_async(to_usb_device(dev), addr, val, 1);
201 }
202 
203 static void _usb_write16_async(struct rtl_priv *rtlpriv, u32 addr, u16 val)
204 {
205 	struct device *dev = rtlpriv->io.dev;
206 
207 	_usb_write_async(to_usb_device(dev), addr, val, 2);
208 }
209 
210 static void _usb_write32_async(struct rtl_priv *rtlpriv, u32 addr, u32 val)
211 {
212 	struct device *dev = rtlpriv->io.dev;
213 
214 	_usb_write_async(to_usb_device(dev), addr, val, 4);
215 }
216 
217 static void _usb_writeN_sync(struct rtl_priv *rtlpriv, u32 addr, void *data,
218 			     u16 len)
219 {
220 	struct device *dev = rtlpriv->io.dev;
221 	struct usb_device *udev = to_usb_device(dev);
222 	u8 request = REALTEK_USB_VENQT_CMD_REQ;
223 	u8 reqtype =  REALTEK_USB_VENQT_WRITE;
224 	u16 wvalue;
225 	u16 index = REALTEK_USB_VENQT_CMD_IDX;
226 	int pipe = usb_sndctrlpipe(udev, 0); /* write_out */
227 	u8 *buffer;
228 
229 	wvalue = (u16)(addr & 0x0000ffff);
230 	buffer = kmemdup(data, len, GFP_ATOMIC);
231 	if (!buffer)
232 		return;
233 	usb_control_msg(udev, pipe, request, reqtype, wvalue,
234 			index, buffer, len, 50);
235 
236 	kfree(buffer);
237 }
238 
239 static void _rtl_usb_io_handler_init(struct device *dev,
240 				     struct ieee80211_hw *hw)
241 {
242 	struct rtl_priv *rtlpriv = rtl_priv(hw);
243 
244 	rtlpriv->io.dev = dev;
245 	mutex_init(&rtlpriv->io.bb_mutex);
246 	rtlpriv->io.write8_async	= _usb_write8_async;
247 	rtlpriv->io.write16_async	= _usb_write16_async;
248 	rtlpriv->io.write32_async	= _usb_write32_async;
249 	rtlpriv->io.read8_sync		= _usb_read8_sync;
250 	rtlpriv->io.read16_sync		= _usb_read16_sync;
251 	rtlpriv->io.read32_sync		= _usb_read32_sync;
252 	rtlpriv->io.writeN_sync		= _usb_writeN_sync;
253 }
254 
255 static void _rtl_usb_io_handler_release(struct ieee80211_hw *hw)
256 {
257 	struct rtl_priv __maybe_unused *rtlpriv = rtl_priv(hw);
258 
259 	mutex_destroy(&rtlpriv->io.bb_mutex);
260 }
261 
262 /**
263  *
264  *	Default aggregation handler. Do nothing and just return the oldest skb.
265  */
266 static struct sk_buff *_none_usb_tx_aggregate_hdl(struct ieee80211_hw *hw,
267 						  struct sk_buff_head *list)
268 {
269 	return skb_dequeue(list);
270 }
271 
272 #define IS_HIGH_SPEED_USB(udev) \
273 		((USB_SPEED_HIGH == (udev)->speed) ? true : false)
274 
275 static int _rtl_usb_init_tx(struct ieee80211_hw *hw)
276 {
277 	u32 i;
278 	struct rtl_priv *rtlpriv = rtl_priv(hw);
279 	struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
280 
281 	rtlusb->max_bulk_out_size = IS_HIGH_SPEED_USB(rtlusb->udev)
282 						    ? USB_HIGH_SPEED_BULK_SIZE
283 						    : USB_FULL_SPEED_BULK_SIZE;
284 
285 	RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG, "USB Max Bulk-out Size=%d\n",
286 		 rtlusb->max_bulk_out_size);
287 
288 	for (i = 0; i < __RTL_TXQ_NUM; i++) {
289 		u32 ep_num = rtlusb->ep_map.ep_mapping[i];
290 		if (!ep_num) {
291 			RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG,
292 				 "Invalid endpoint map setting!\n");
293 			return -EINVAL;
294 		}
295 	}
296 
297 	rtlusb->usb_tx_post_hdl =
298 		 rtlpriv->cfg->usb_interface_cfg->usb_tx_post_hdl;
299 	rtlusb->usb_tx_cleanup	=
300 		 rtlpriv->cfg->usb_interface_cfg->usb_tx_cleanup;
301 	rtlusb->usb_tx_aggregate_hdl =
302 		 (rtlpriv->cfg->usb_interface_cfg->usb_tx_aggregate_hdl)
303 		 ? rtlpriv->cfg->usb_interface_cfg->usb_tx_aggregate_hdl
304 		 : &_none_usb_tx_aggregate_hdl;
305 
306 	init_usb_anchor(&rtlusb->tx_submitted);
307 	for (i = 0; i < RTL_USB_MAX_EP_NUM; i++) {
308 		skb_queue_head_init(&rtlusb->tx_skb_queue[i]);
309 		init_usb_anchor(&rtlusb->tx_pending[i]);
310 	}
311 	return 0;
312 }
313 
314 static void _rtl_rx_work(unsigned long param);
315 
316 static int _rtl_usb_init_rx(struct ieee80211_hw *hw)
317 {
318 	struct rtl_priv *rtlpriv = rtl_priv(hw);
319 	struct rtl_usb_priv *usb_priv = rtl_usbpriv(hw);
320 	struct rtl_usb *rtlusb = rtl_usbdev(usb_priv);
321 
322 	rtlusb->rx_max_size = rtlpriv->cfg->usb_interface_cfg->rx_max_size;
323 	rtlusb->rx_urb_num = rtlpriv->cfg->usb_interface_cfg->rx_urb_num;
324 	rtlusb->in_ep = rtlpriv->cfg->usb_interface_cfg->in_ep_num;
325 	rtlusb->usb_rx_hdl = rtlpriv->cfg->usb_interface_cfg->usb_rx_hdl;
326 	rtlusb->usb_rx_segregate_hdl =
327 		rtlpriv->cfg->usb_interface_cfg->usb_rx_segregate_hdl;
328 
329 	pr_info("rx_max_size %d, rx_urb_num %d, in_ep %d\n",
330 		rtlusb->rx_max_size, rtlusb->rx_urb_num, rtlusb->in_ep);
331 	init_usb_anchor(&rtlusb->rx_submitted);
332 	init_usb_anchor(&rtlusb->rx_cleanup_urbs);
333 
334 	skb_queue_head_init(&rtlusb->rx_queue);
335 	rtlusb->rx_work_tasklet.func = _rtl_rx_work;
336 	rtlusb->rx_work_tasklet.data = (unsigned long)rtlusb;
337 
338 	return 0;
339 }
340 
341 static int _rtl_usb_init(struct ieee80211_hw *hw)
342 {
343 	struct rtl_priv *rtlpriv = rtl_priv(hw);
344 	struct rtl_usb_priv *usb_priv = rtl_usbpriv(hw);
345 	struct rtl_usb *rtlusb = rtl_usbdev(usb_priv);
346 	int err;
347 	u8 epidx;
348 	struct usb_interface	*usb_intf = rtlusb->intf;
349 	u8 epnums = usb_intf->cur_altsetting->desc.bNumEndpoints;
350 
351 	rtlusb->out_ep_nums = rtlusb->in_ep_nums = 0;
352 	for (epidx = 0; epidx < epnums; epidx++) {
353 		struct usb_endpoint_descriptor *pep_desc;
354 		pep_desc = &usb_intf->cur_altsetting->endpoint[epidx].desc;
355 
356 		if (usb_endpoint_dir_in(pep_desc))
357 			rtlusb->in_ep_nums++;
358 		else if (usb_endpoint_dir_out(pep_desc))
359 			rtlusb->out_ep_nums++;
360 
361 		RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG,
362 			 "USB EP(0x%02x), MaxPacketSize=%d, Interval=%d\n",
363 			 pep_desc->bEndpointAddress, pep_desc->wMaxPacketSize,
364 			 pep_desc->bInterval);
365 	}
366 	if (rtlusb->in_ep_nums <  rtlpriv->cfg->usb_interface_cfg->in_ep_num) {
367 		pr_err("Too few input end points found\n");
368 		return -EINVAL;
369 	}
370 	if (rtlusb->out_ep_nums == 0) {
371 		pr_err("No output end points found\n");
372 		return -EINVAL;
373 	}
374 	/* usb endpoint mapping */
375 	err = rtlpriv->cfg->usb_interface_cfg->usb_endpoint_mapping(hw);
376 	rtlusb->usb_mq_to_hwq =  rtlpriv->cfg->usb_interface_cfg->usb_mq_to_hwq;
377 	_rtl_usb_init_tx(hw);
378 	_rtl_usb_init_rx(hw);
379 	return err;
380 }
381 
382 static void rtl_usb_init_sw(struct ieee80211_hw *hw)
383 {
384 	struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
385 	struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
386 	struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
387 	struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
388 
389 	rtlhal->hw = hw;
390 	ppsc->inactiveps = false;
391 	ppsc->leisure_ps = false;
392 	ppsc->fwctrl_lps = false;
393 	ppsc->reg_fwctrl_lps = 3;
394 	ppsc->reg_max_lps_awakeintvl = 5;
395 	ppsc->fwctrl_psmode = FW_PS_DTIM_MODE;
396 
397 	 /* IBSS */
398 	mac->beacon_interval = 100;
399 
400 	 /* AMPDU */
401 	mac->min_space_cfg = 0;
402 	mac->max_mss_density = 0;
403 
404 	/* set sane AMPDU defaults */
405 	mac->current_ampdu_density = 7;
406 	mac->current_ampdu_factor = 3;
407 
408 	/* QOS */
409 	rtlusb->acm_method = EACMWAY2_SW;
410 
411 	/* IRQ */
412 	/* HIMR - turn all on */
413 	rtlusb->irq_mask[0] = 0xFFFFFFFF;
414 	/* HIMR_EX - turn all on */
415 	rtlusb->irq_mask[1] = 0xFFFFFFFF;
416 	rtlusb->disableHWSM =  true;
417 }
418 
419 static void _rtl_rx_completed(struct urb *urb);
420 
421 static int _rtl_prep_rx_urb(struct ieee80211_hw *hw, struct rtl_usb *rtlusb,
422 			      struct urb *urb, gfp_t gfp_mask)
423 {
424 	void *buf;
425 
426 	buf = usb_alloc_coherent(rtlusb->udev, rtlusb->rx_max_size, gfp_mask,
427 				 &urb->transfer_dma);
428 	if (!buf) {
429 		pr_err("Failed to usb_alloc_coherent!!\n");
430 		return -ENOMEM;
431 	}
432 
433 	usb_fill_bulk_urb(urb, rtlusb->udev,
434 			  usb_rcvbulkpipe(rtlusb->udev, rtlusb->in_ep),
435 			  buf, rtlusb->rx_max_size, _rtl_rx_completed, rtlusb);
436 	urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
437 
438 	return 0;
439 }
440 
441 static void _rtl_usb_rx_process_agg(struct ieee80211_hw *hw,
442 				    struct sk_buff *skb)
443 {
444 	struct rtl_priv *rtlpriv = rtl_priv(hw);
445 	u8 *rxdesc = skb->data;
446 	struct ieee80211_hdr *hdr;
447 	bool unicast = false;
448 	__le16 fc;
449 	struct ieee80211_rx_status rx_status = {0};
450 	struct rtl_stats stats = {
451 		.signal = 0,
452 		.rate = 0,
453 	};
454 
455 	skb_pull(skb, RTL_RX_DESC_SIZE);
456 	rtlpriv->cfg->ops->query_rx_desc(hw, &stats, &rx_status, rxdesc, skb);
457 	skb_pull(skb, (stats.rx_drvinfo_size + stats.rx_bufshift));
458 	hdr = (struct ieee80211_hdr *)(skb->data);
459 	fc = hdr->frame_control;
460 	if (!stats.crc) {
461 		memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
462 
463 		if (is_broadcast_ether_addr(hdr->addr1)) {
464 			/*TODO*/;
465 		} else if (is_multicast_ether_addr(hdr->addr1)) {
466 			/*TODO*/
467 		} else {
468 			unicast = true;
469 			rtlpriv->stats.rxbytesunicast +=  skb->len;
470 		}
471 
472 		if (ieee80211_is_data(fc)) {
473 			rtlpriv->cfg->ops->led_control(hw, LED_CTL_RX);
474 
475 			if (unicast)
476 				rtlpriv->link_info.num_rx_inperiod++;
477 		}
478 		/* static bcn for roaming */
479 		rtl_beacon_statistic(hw, skb);
480 	}
481 }
482 
483 static void _rtl_usb_rx_process_noagg(struct ieee80211_hw *hw,
484 				      struct sk_buff *skb)
485 {
486 	struct rtl_priv *rtlpriv = rtl_priv(hw);
487 	u8 *rxdesc = skb->data;
488 	struct ieee80211_hdr *hdr;
489 	bool unicast = false;
490 	__le16 fc;
491 	struct ieee80211_rx_status rx_status = {0};
492 	struct rtl_stats stats = {
493 		.signal = 0,
494 		.rate = 0,
495 	};
496 
497 	skb_pull(skb, RTL_RX_DESC_SIZE);
498 	rtlpriv->cfg->ops->query_rx_desc(hw, &stats, &rx_status, rxdesc, skb);
499 	skb_pull(skb, (stats.rx_drvinfo_size + stats.rx_bufshift));
500 	hdr = (struct ieee80211_hdr *)(skb->data);
501 	fc = hdr->frame_control;
502 	if (!stats.crc) {
503 		memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
504 
505 		if (is_broadcast_ether_addr(hdr->addr1)) {
506 			/*TODO*/;
507 		} else if (is_multicast_ether_addr(hdr->addr1)) {
508 			/*TODO*/
509 		} else {
510 			unicast = true;
511 			rtlpriv->stats.rxbytesunicast +=  skb->len;
512 		}
513 
514 		if (ieee80211_is_data(fc)) {
515 			rtlpriv->cfg->ops->led_control(hw, LED_CTL_RX);
516 
517 			if (unicast)
518 				rtlpriv->link_info.num_rx_inperiod++;
519 		}
520 
521 		/* static bcn for roaming */
522 		rtl_beacon_statistic(hw, skb);
523 
524 		if (likely(rtl_action_proc(hw, skb, false)))
525 			ieee80211_rx(hw, skb);
526 		else
527 			dev_kfree_skb_any(skb);
528 	} else {
529 		dev_kfree_skb_any(skb);
530 	}
531 }
532 
533 static void _rtl_rx_pre_process(struct ieee80211_hw *hw, struct sk_buff *skb)
534 {
535 	struct sk_buff *_skb;
536 	struct sk_buff_head rx_queue;
537 	struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
538 
539 	skb_queue_head_init(&rx_queue);
540 	if (rtlusb->usb_rx_segregate_hdl)
541 		rtlusb->usb_rx_segregate_hdl(hw, skb, &rx_queue);
542 	WARN_ON(skb_queue_empty(&rx_queue));
543 	while (!skb_queue_empty(&rx_queue)) {
544 		_skb = skb_dequeue(&rx_queue);
545 		_rtl_usb_rx_process_agg(hw, _skb);
546 		ieee80211_rx(hw, _skb);
547 	}
548 }
549 
550 #define __RX_SKB_MAX_QUEUED	64
551 
552 static void _rtl_rx_work(unsigned long param)
553 {
554 	struct rtl_usb *rtlusb = (struct rtl_usb *)param;
555 	struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf);
556 	struct sk_buff *skb;
557 
558 	while ((skb = skb_dequeue(&rtlusb->rx_queue))) {
559 		if (unlikely(IS_USB_STOP(rtlusb))) {
560 			dev_kfree_skb_any(skb);
561 			continue;
562 		}
563 
564 		if (likely(!rtlusb->usb_rx_segregate_hdl)) {
565 			_rtl_usb_rx_process_noagg(hw, skb);
566 		} else {
567 			/* TO DO */
568 			_rtl_rx_pre_process(hw, skb);
569 			pr_err("rx agg not supported\n");
570 		}
571 	}
572 }
573 
574 static unsigned int _rtl_rx_get_padding(struct ieee80211_hdr *hdr,
575 					unsigned int len)
576 {
577 #if NET_IP_ALIGN != 0
578 	unsigned int padding = 0;
579 #endif
580 
581 	/* make function no-op when possible */
582 	if (NET_IP_ALIGN == 0 || len < sizeof(*hdr))
583 		return 0;
584 
585 #if NET_IP_ALIGN != 0
586 	/* alignment calculation as in lbtf_rx() / carl9170_rx_copy_data() */
587 	/* TODO: deduplicate common code, define helper function instead? */
588 
589 	if (ieee80211_is_data_qos(hdr->frame_control)) {
590 		u8 *qc = ieee80211_get_qos_ctl(hdr);
591 
592 		padding ^= NET_IP_ALIGN;
593 
594 		/* Input might be invalid, avoid accessing memory outside
595 		 * the buffer.
596 		 */
597 		if ((unsigned long)qc - (unsigned long)hdr < len &&
598 		    *qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT)
599 			padding ^= NET_IP_ALIGN;
600 	}
601 
602 	if (ieee80211_has_a4(hdr->frame_control))
603 		padding ^= NET_IP_ALIGN;
604 
605 	return padding;
606 #endif
607 }
608 
609 #define __RADIO_TAP_SIZE_RSV	32
610 
611 static void _rtl_rx_completed(struct urb *_urb)
612 {
613 	struct rtl_usb *rtlusb = (struct rtl_usb *)_urb->context;
614 	int err = 0;
615 
616 	if (unlikely(IS_USB_STOP(rtlusb)))
617 		goto free;
618 
619 	if (likely(0 == _urb->status)) {
620 		unsigned int padding;
621 		struct sk_buff *skb;
622 		unsigned int qlen;
623 		unsigned int size = _urb->actual_length;
624 		struct ieee80211_hdr *hdr;
625 
626 		if (size < RTL_RX_DESC_SIZE + sizeof(struct ieee80211_hdr)) {
627 			pr_err("Too short packet from bulk IN! (len: %d)\n",
628 			       size);
629 			goto resubmit;
630 		}
631 
632 		qlen = skb_queue_len(&rtlusb->rx_queue);
633 		if (qlen >= __RX_SKB_MAX_QUEUED) {
634 			pr_err("Pending RX skbuff queue full! (qlen: %d)\n",
635 			       qlen);
636 			goto resubmit;
637 		}
638 
639 		hdr = (void *)(_urb->transfer_buffer + RTL_RX_DESC_SIZE);
640 		padding = _rtl_rx_get_padding(hdr, size - RTL_RX_DESC_SIZE);
641 
642 		skb = dev_alloc_skb(size + __RADIO_TAP_SIZE_RSV + padding);
643 		if (!skb) {
644 			pr_err("Can't allocate skb for bulk IN!\n");
645 			goto resubmit;
646 		}
647 
648 		_rtl_install_trx_info(rtlusb, skb, rtlusb->in_ep);
649 
650 		/* Make sure the payload data is 4 byte aligned. */
651 		skb_reserve(skb, padding);
652 
653 		/* reserve some space for mac80211's radiotap */
654 		skb_reserve(skb, __RADIO_TAP_SIZE_RSV);
655 
656 		skb_put_data(skb, _urb->transfer_buffer, size);
657 
658 		skb_queue_tail(&rtlusb->rx_queue, skb);
659 		tasklet_schedule(&rtlusb->rx_work_tasklet);
660 
661 		goto resubmit;
662 	}
663 
664 	switch (_urb->status) {
665 	/* disconnect */
666 	case -ENOENT:
667 	case -ECONNRESET:
668 	case -ENODEV:
669 	case -ESHUTDOWN:
670 		goto free;
671 	default:
672 		break;
673 	}
674 
675 resubmit:
676 	usb_anchor_urb(_urb, &rtlusb->rx_submitted);
677 	err = usb_submit_urb(_urb, GFP_ATOMIC);
678 	if (unlikely(err)) {
679 		usb_unanchor_urb(_urb);
680 		goto free;
681 	}
682 	return;
683 
684 free:
685 	/* On some architectures, usb_free_coherent must not be called from
686 	 * hardirq context. Queue urb to cleanup list.
687 	 */
688 	usb_anchor_urb(_urb, &rtlusb->rx_cleanup_urbs);
689 }
690 
691 #undef __RADIO_TAP_SIZE_RSV
692 
693 static void _rtl_usb_cleanup_rx(struct ieee80211_hw *hw)
694 {
695 	struct rtl_priv *rtlpriv = rtl_priv(hw);
696 	struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
697 	struct urb *urb;
698 
699 	usb_kill_anchored_urbs(&rtlusb->rx_submitted);
700 
701 	tasklet_kill(&rtlusb->rx_work_tasklet);
702 	cancel_work_sync(&rtlpriv->works.lps_change_work);
703 
704 	flush_workqueue(rtlpriv->works.rtl_wq);
705 	destroy_workqueue(rtlpriv->works.rtl_wq);
706 
707 	skb_queue_purge(&rtlusb->rx_queue);
708 
709 	while ((urb = usb_get_from_anchor(&rtlusb->rx_cleanup_urbs))) {
710 		usb_free_coherent(urb->dev, urb->transfer_buffer_length,
711 				urb->transfer_buffer, urb->transfer_dma);
712 		usb_free_urb(urb);
713 	}
714 }
715 
716 static int _rtl_usb_receive(struct ieee80211_hw *hw)
717 {
718 	struct urb *urb;
719 	int err;
720 	int i;
721 	struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
722 
723 	WARN_ON(0 == rtlusb->rx_urb_num);
724 	/* 1600 == 1514 + max WLAN header + rtk info */
725 	WARN_ON(rtlusb->rx_max_size < 1600);
726 
727 	for (i = 0; i < rtlusb->rx_urb_num; i++) {
728 		err = -ENOMEM;
729 		urb = usb_alloc_urb(0, GFP_KERNEL);
730 		if (!urb)
731 			goto err_out;
732 
733 		err = _rtl_prep_rx_urb(hw, rtlusb, urb, GFP_KERNEL);
734 		if (err < 0) {
735 			pr_err("Failed to prep_rx_urb!!\n");
736 			usb_free_urb(urb);
737 			goto err_out;
738 		}
739 
740 		usb_anchor_urb(urb, &rtlusb->rx_submitted);
741 		err = usb_submit_urb(urb, GFP_KERNEL);
742 		if (err)
743 			goto err_out;
744 		usb_free_urb(urb);
745 	}
746 	return 0;
747 
748 err_out:
749 	usb_kill_anchored_urbs(&rtlusb->rx_submitted);
750 	_rtl_usb_cleanup_rx(hw);
751 	return err;
752 }
753 
754 static int rtl_usb_start(struct ieee80211_hw *hw)
755 {
756 	int err;
757 	struct rtl_priv *rtlpriv = rtl_priv(hw);
758 	struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
759 	struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
760 
761 	err = rtlpriv->cfg->ops->hw_init(hw);
762 	if (!err) {
763 		rtl_init_rx_config(hw);
764 
765 		/* Enable software */
766 		SET_USB_START(rtlusb);
767 		/* should after adapter start and interrupt enable. */
768 		set_hal_start(rtlhal);
769 
770 		/* Start bulk IN */
771 		err = _rtl_usb_receive(hw);
772 	}
773 
774 	return err;
775 }
776 /**
777  *
778  *
779  */
780 
781 /*=======================  tx =========================================*/
782 static void rtl_usb_cleanup(struct ieee80211_hw *hw)
783 {
784 	u32 i;
785 	struct sk_buff *_skb;
786 	struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
787 	struct ieee80211_tx_info *txinfo;
788 
789 	/* clean up rx stuff. */
790 	_rtl_usb_cleanup_rx(hw);
791 
792 	/* clean up tx stuff */
793 	for (i = 0; i < RTL_USB_MAX_EP_NUM; i++) {
794 		while ((_skb = skb_dequeue(&rtlusb->tx_skb_queue[i]))) {
795 			rtlusb->usb_tx_cleanup(hw, _skb);
796 			txinfo = IEEE80211_SKB_CB(_skb);
797 			ieee80211_tx_info_clear_status(txinfo);
798 			txinfo->flags |= IEEE80211_TX_STAT_ACK;
799 			ieee80211_tx_status_irqsafe(hw, _skb);
800 		}
801 		usb_kill_anchored_urbs(&rtlusb->tx_pending[i]);
802 	}
803 	usb_kill_anchored_urbs(&rtlusb->tx_submitted);
804 }
805 
806 /**
807  *
808  * We may add some struct into struct rtl_usb later. Do deinit here.
809  *
810  */
811 static void rtl_usb_deinit(struct ieee80211_hw *hw)
812 {
813 	rtl_usb_cleanup(hw);
814 }
815 
816 static void rtl_usb_stop(struct ieee80211_hw *hw)
817 {
818 	struct rtl_priv *rtlpriv = rtl_priv(hw);
819 	struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
820 	struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
821 	struct urb *urb;
822 
823 	/* should after adapter start and interrupt enable. */
824 	set_hal_stop(rtlhal);
825 	cancel_work_sync(&rtlpriv->works.fill_h2c_cmd);
826 	/* Enable software */
827 	SET_USB_STOP(rtlusb);
828 
829 	/* free pre-allocated URBs from rtl_usb_start() */
830 	usb_kill_anchored_urbs(&rtlusb->rx_submitted);
831 
832 	tasklet_kill(&rtlusb->rx_work_tasklet);
833 	cancel_work_sync(&rtlpriv->works.lps_change_work);
834 
835 	flush_workqueue(rtlpriv->works.rtl_wq);
836 
837 	skb_queue_purge(&rtlusb->rx_queue);
838 
839 	while ((urb = usb_get_from_anchor(&rtlusb->rx_cleanup_urbs))) {
840 		usb_free_coherent(urb->dev, urb->transfer_buffer_length,
841 				urb->transfer_buffer, urb->transfer_dma);
842 		usb_free_urb(urb);
843 	}
844 
845 	rtlpriv->cfg->ops->hw_disable(hw);
846 }
847 
848 static void _rtl_submit_tx_urb(struct ieee80211_hw *hw, struct urb *_urb)
849 {
850 	int err;
851 	struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
852 
853 	usb_anchor_urb(_urb, &rtlusb->tx_submitted);
854 	err = usb_submit_urb(_urb, GFP_ATOMIC);
855 	if (err < 0) {
856 		struct sk_buff *skb;
857 
858 		pr_err("Failed to submit urb\n");
859 		usb_unanchor_urb(_urb);
860 		skb = (struct sk_buff *)_urb->context;
861 		kfree_skb(skb);
862 	}
863 	usb_free_urb(_urb);
864 }
865 
866 static int _usb_tx_post(struct ieee80211_hw *hw, struct urb *urb,
867 			struct sk_buff *skb)
868 {
869 	struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
870 	struct ieee80211_tx_info *txinfo;
871 
872 	rtlusb->usb_tx_post_hdl(hw, urb, skb);
873 	skb_pull(skb, RTL_TX_HEADER_SIZE);
874 	txinfo = IEEE80211_SKB_CB(skb);
875 	ieee80211_tx_info_clear_status(txinfo);
876 	txinfo->flags |= IEEE80211_TX_STAT_ACK;
877 
878 	if (urb->status) {
879 		pr_err("Urb has error status 0x%X\n", urb->status);
880 		goto out;
881 	}
882 	/*  TODO:	statistics */
883 out:
884 	ieee80211_tx_status_irqsafe(hw, skb);
885 	return urb->status;
886 }
887 
888 static void _rtl_tx_complete(struct urb *urb)
889 {
890 	struct sk_buff *skb = (struct sk_buff *)urb->context;
891 	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
892 	struct rtl_usb *rtlusb = (struct rtl_usb *)info->rate_driver_data[0];
893 	struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf);
894 	int err;
895 
896 	if (unlikely(IS_USB_STOP(rtlusb)))
897 		return;
898 	err = _usb_tx_post(hw, urb, skb);
899 	if (err) {
900 		/* Ignore error and keep issuiing other urbs */
901 		return;
902 	}
903 }
904 
905 static struct urb *_rtl_usb_tx_urb_setup(struct ieee80211_hw *hw,
906 				struct sk_buff *skb, u32 ep_num)
907 {
908 	struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
909 	struct urb *_urb;
910 
911 	WARN_ON(NULL == skb);
912 	_urb = usb_alloc_urb(0, GFP_ATOMIC);
913 	if (!_urb) {
914 		kfree_skb(skb);
915 		return NULL;
916 	}
917 	_rtl_install_trx_info(rtlusb, skb, ep_num);
918 	usb_fill_bulk_urb(_urb, rtlusb->udev, usb_sndbulkpipe(rtlusb->udev,
919 			  ep_num), skb->data, skb->len, _rtl_tx_complete, skb);
920 	_urb->transfer_flags |= URB_ZERO_PACKET;
921 	return _urb;
922 }
923 
924 static void _rtl_usb_transmit(struct ieee80211_hw *hw, struct sk_buff *skb,
925 		       enum rtl_txq qnum)
926 {
927 	struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
928 	u32 ep_num;
929 	struct urb *_urb = NULL;
930 	struct sk_buff *_skb = NULL;
931 
932 	WARN_ON(NULL == rtlusb->usb_tx_aggregate_hdl);
933 	if (unlikely(IS_USB_STOP(rtlusb))) {
934 		pr_err("USB device is stopping...\n");
935 		kfree_skb(skb);
936 		return;
937 	}
938 	ep_num = rtlusb->ep_map.ep_mapping[qnum];
939 	_skb = skb;
940 	_urb = _rtl_usb_tx_urb_setup(hw, _skb, ep_num);
941 	if (unlikely(!_urb)) {
942 		pr_err("Can't allocate urb. Drop skb!\n");
943 		kfree_skb(skb);
944 		return;
945 	}
946 	_rtl_submit_tx_urb(hw, _urb);
947 }
948 
949 static void _rtl_usb_tx_preprocess(struct ieee80211_hw *hw,
950 				   struct ieee80211_sta *sta,
951 				   struct sk_buff *skb,
952 				   u16 hw_queue)
953 {
954 	struct rtl_priv *rtlpriv = rtl_priv(hw);
955 	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
956 	struct rtl_tx_desc *pdesc = NULL;
957 	struct rtl_tcb_desc tcb_desc;
958 	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
959 	__le16 fc = hdr->frame_control;
960 	u8 *pda_addr = hdr->addr1;
961 
962 	memset(&tcb_desc, 0, sizeof(struct rtl_tcb_desc));
963 	if (ieee80211_is_auth(fc)) {
964 		RT_TRACE(rtlpriv, COMP_SEND, DBG_DMESG, "MAC80211_LINKING\n");
965 	}
966 
967 	if (rtlpriv->psc.sw_ps_enabled) {
968 		if (ieee80211_is_data(fc) && !ieee80211_is_nullfunc(fc) &&
969 		    !ieee80211_has_pm(fc))
970 			hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
971 	}
972 
973 	rtl_action_proc(hw, skb, true);
974 	if (is_multicast_ether_addr(pda_addr))
975 		rtlpriv->stats.txbytesmulticast += skb->len;
976 	else if (is_broadcast_ether_addr(pda_addr))
977 		rtlpriv->stats.txbytesbroadcast += skb->len;
978 	else
979 		rtlpriv->stats.txbytesunicast += skb->len;
980 	rtlpriv->cfg->ops->fill_tx_desc(hw, hdr, (u8 *)pdesc, NULL, info, sta, skb,
981 					hw_queue, &tcb_desc);
982 	if (ieee80211_is_data(fc))
983 		rtlpriv->cfg->ops->led_control(hw, LED_CTL_TX);
984 }
985 
986 static int rtl_usb_tx(struct ieee80211_hw *hw,
987 		      struct ieee80211_sta *sta,
988 		      struct sk_buff *skb,
989 		      struct rtl_tcb_desc *dummy)
990 {
991 	struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
992 	struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
993 	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
994 	__le16 fc = hdr->frame_control;
995 	u16 hw_queue;
996 
997 	if (unlikely(is_hal_stop(rtlhal)))
998 		goto err_free;
999 	hw_queue = rtlusb->usb_mq_to_hwq(fc, skb_get_queue_mapping(skb));
1000 	_rtl_usb_tx_preprocess(hw, sta, skb, hw_queue);
1001 	_rtl_usb_transmit(hw, skb, hw_queue);
1002 	return NETDEV_TX_OK;
1003 
1004 err_free:
1005 	dev_kfree_skb_any(skb);
1006 	return NETDEV_TX_OK;
1007 }
1008 
1009 static bool rtl_usb_tx_chk_waitq_insert(struct ieee80211_hw *hw,
1010 					struct ieee80211_sta *sta,
1011 					struct sk_buff *skb)
1012 {
1013 	return false;
1014 }
1015 
1016 static void rtl_fill_h2c_cmd_work_callback(struct work_struct *work)
1017 {
1018 	struct rtl_works *rtlworks =
1019 	    container_of(work, struct rtl_works, fill_h2c_cmd);
1020 	struct ieee80211_hw *hw = rtlworks->hw;
1021 	struct rtl_priv *rtlpriv = rtl_priv(hw);
1022 
1023 	rtlpriv->cfg->ops->fill_h2c_cmd(hw, H2C_RA_MASK, 5, rtlpriv->rate_mask);
1024 }
1025 
1026 static const struct rtl_intf_ops rtl_usb_ops = {
1027 	.adapter_start = rtl_usb_start,
1028 	.adapter_stop = rtl_usb_stop,
1029 	.adapter_tx = rtl_usb_tx,
1030 	.waitq_insert = rtl_usb_tx_chk_waitq_insert,
1031 };
1032 
1033 int rtl_usb_probe(struct usb_interface *intf,
1034 		  const struct usb_device_id *id,
1035 		  struct rtl_hal_cfg *rtl_hal_cfg)
1036 {
1037 	int err;
1038 	struct ieee80211_hw *hw = NULL;
1039 	struct rtl_priv *rtlpriv = NULL;
1040 	struct usb_device	*udev;
1041 	struct rtl_usb_priv *usb_priv;
1042 
1043 	hw = ieee80211_alloc_hw(sizeof(struct rtl_priv) +
1044 				sizeof(struct rtl_usb_priv), &rtl_ops);
1045 	if (!hw) {
1046 		WARN_ONCE(true, "rtl_usb: ieee80211 alloc failed\n");
1047 		return -ENOMEM;
1048 	}
1049 	rtlpriv = hw->priv;
1050 	rtlpriv->hw = hw;
1051 	rtlpriv->usb_data = kzalloc(RTL_USB_MAX_RX_COUNT * sizeof(u32),
1052 				    GFP_KERNEL);
1053 	if (!rtlpriv->usb_data)
1054 		return -ENOMEM;
1055 
1056 	/* this spin lock must be initialized early */
1057 	spin_lock_init(&rtlpriv->locks.usb_lock);
1058 	INIT_WORK(&rtlpriv->works.fill_h2c_cmd,
1059 		  rtl_fill_h2c_cmd_work_callback);
1060 	INIT_WORK(&rtlpriv->works.lps_change_work,
1061 		  rtl_lps_change_work_callback);
1062 
1063 	rtlpriv->usb_data_index = 0;
1064 	init_completion(&rtlpriv->firmware_loading_complete);
1065 	SET_IEEE80211_DEV(hw, &intf->dev);
1066 	udev = interface_to_usbdev(intf);
1067 	usb_get_dev(udev);
1068 	usb_priv = rtl_usbpriv(hw);
1069 	memset(usb_priv, 0, sizeof(*usb_priv));
1070 	usb_priv->dev.intf = intf;
1071 	usb_priv->dev.udev = udev;
1072 	usb_set_intfdata(intf, hw);
1073 	/* init cfg & intf_ops */
1074 	rtlpriv->rtlhal.interface = INTF_USB;
1075 	rtlpriv->cfg = rtl_hal_cfg;
1076 	rtlpriv->intf_ops = &rtl_usb_ops;
1077 	/* Init IO handler */
1078 	_rtl_usb_io_handler_init(&udev->dev, hw);
1079 	rtlpriv->cfg->ops->read_chip_version(hw);
1080 	/*like read eeprom and so on */
1081 	rtlpriv->cfg->ops->read_eeprom_info(hw);
1082 	err = _rtl_usb_init(hw);
1083 	if (err)
1084 		goto error_out;
1085 	rtl_usb_init_sw(hw);
1086 	/* Init mac80211 sw */
1087 	err = rtl_init_core(hw);
1088 	if (err) {
1089 		pr_err("Can't allocate sw for mac80211\n");
1090 		goto error_out;
1091 	}
1092 	if (rtlpriv->cfg->ops->init_sw_vars(hw)) {
1093 		pr_err("Can't init_sw_vars\n");
1094 		goto error_out;
1095 	}
1096 	rtlpriv->cfg->ops->init_sw_leds(hw);
1097 
1098 	err = ieee80211_register_hw(hw);
1099 	if (err) {
1100 		pr_err("Can't register mac80211 hw.\n");
1101 		err = -ENODEV;
1102 		goto error_out;
1103 	}
1104 	rtlpriv->mac80211.mac80211_registered = 1;
1105 
1106 	set_bit(RTL_STATUS_INTERFACE_START, &rtlpriv->status);
1107 	return 0;
1108 
1109 error_out:
1110 	rtl_deinit_core(hw);
1111 	_rtl_usb_io_handler_release(hw);
1112 	usb_put_dev(udev);
1113 	complete(&rtlpriv->firmware_loading_complete);
1114 	return -ENODEV;
1115 }
1116 EXPORT_SYMBOL(rtl_usb_probe);
1117 
1118 void rtl_usb_disconnect(struct usb_interface *intf)
1119 {
1120 	struct ieee80211_hw *hw = usb_get_intfdata(intf);
1121 	struct rtl_priv *rtlpriv = rtl_priv(hw);
1122 	struct rtl_mac *rtlmac = rtl_mac(rtl_priv(hw));
1123 	struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
1124 
1125 	if (unlikely(!rtlpriv))
1126 		return;
1127 	/* just in case driver is removed before firmware callback */
1128 	wait_for_completion(&rtlpriv->firmware_loading_complete);
1129 	clear_bit(RTL_STATUS_INTERFACE_START, &rtlpriv->status);
1130 	/*ieee80211_unregister_hw will call ops_stop */
1131 	if (rtlmac->mac80211_registered == 1) {
1132 		ieee80211_unregister_hw(hw);
1133 		rtlmac->mac80211_registered = 0;
1134 	} else {
1135 		rtl_deinit_deferred_work(hw);
1136 		rtlpriv->intf_ops->adapter_stop(hw);
1137 	}
1138 	/*deinit rfkill */
1139 	/* rtl_deinit_rfkill(hw); */
1140 	rtl_usb_deinit(hw);
1141 	rtl_deinit_core(hw);
1142 	kfree(rtlpriv->usb_data);
1143 	rtlpriv->cfg->ops->deinit_sw_leds(hw);
1144 	rtlpriv->cfg->ops->deinit_sw_vars(hw);
1145 	_rtl_usb_io_handler_release(hw);
1146 	usb_put_dev(rtlusb->udev);
1147 	usb_set_intfdata(intf, NULL);
1148 	ieee80211_free_hw(hw);
1149 }
1150 EXPORT_SYMBOL(rtl_usb_disconnect);
1151 
1152 int rtl_usb_suspend(struct usb_interface *pusb_intf, pm_message_t message)
1153 {
1154 	return 0;
1155 }
1156 EXPORT_SYMBOL(rtl_usb_suspend);
1157 
1158 int rtl_usb_resume(struct usb_interface *pusb_intf)
1159 {
1160 	return 0;
1161 }
1162 EXPORT_SYMBOL(rtl_usb_resume);
1163