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Linux 4.2.1
[linux/fpc-iii.git] / drivers / net / wireless / rtlwifi / usb.c
blob2721cf89fb160f0d3f4e6106474c5da101707a18
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 * You should have received a copy of the GNU General Public License along with
15 * this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
17 *
18 * The full GNU General Public License is included in this distribution in the
19 * file called LICENSE.
20 *
21 * Contact Information:
22 * wlanfae <wlanfae@realtek.com>
23 * Realtek Corporation, No. 2, Innovation Road II, Hsinchu Science Park,
24 * Hsinchu 300, Taiwan.
25 *
26 *****************************************************************************/
27
28 #include "wifi.h"
29 #include "core.h"
30 #include "usb.h"
31 #include "base.h"
32 #include "ps.h"
33 #include "rtl8192c/fw_common.h"
34 #include <linux/export.h>
35 #include <linux/module.h>
36
37 MODULE_AUTHOR("lizhaoming <chaoming_li@realsil.com.cn>");
38 MODULE_AUTHOR("Realtek WlanFAE <wlanfae@realtek.com>");
39 MODULE_AUTHOR("Larry Finger <Larry.FInger@lwfinger.net>");
40 MODULE_LICENSE("GPL");
41 MODULE_DESCRIPTION("USB basic driver for rtlwifi");
42
43 #define REALTEK_USB_VENQT_READ 0xC0
44 #define REALTEK_USB_VENQT_WRITE 0x40
45 #define REALTEK_USB_VENQT_CMD_REQ 0x05
46 #define REALTEK_USB_VENQT_CMD_IDX 0x00
47
48 #define MAX_USBCTRL_VENDORREQ_TIMES 10
49
50 static void usbctrl_async_callback(struct urb *urb)
51 {
52 if (urb) {
53 /* free dr */
54 kfree(urb->setup_packet);
55 /* free databuf */
56 kfree(urb->transfer_buffer);
57 }
58 }
59
60 static int _usbctrl_vendorreq_async_write(struct usb_device *udev, u8 request,
61 u16 value, u16 index, void *pdata,
62 u16 len)
63 {
64 int rc;
65 unsigned int pipe;
66 u8 reqtype;
67 struct usb_ctrlrequest *dr;
68 struct urb *urb;
69 const u16 databuf_maxlen = REALTEK_USB_VENQT_MAX_BUF_SIZE;
70 u8 *databuf;
71
72 if (WARN_ON_ONCE(len > databuf_maxlen))
73 len = databuf_maxlen;
74
75 pipe = usb_sndctrlpipe(udev, 0); /* write_out */
76 reqtype = REALTEK_USB_VENQT_WRITE;
77
78 dr = kzalloc(sizeof(*dr), GFP_ATOMIC);
79 if (!dr)
80 return -ENOMEM;
81
82 databuf = kzalloc(databuf_maxlen, GFP_ATOMIC);
83 if (!databuf) {
84 kfree(dr);
85 return -ENOMEM;
86 }
87
88 urb = usb_alloc_urb(0, GFP_ATOMIC);
89 if (!urb) {
90 kfree(databuf);
91 kfree(dr);
92 return -ENOMEM;
93 }
94
95 dr->bRequestType = reqtype;
96 dr->bRequest = request;
97 dr->wValue = cpu_to_le16(value);
98 dr->wIndex = cpu_to_le16(index);
99 dr->wLength = cpu_to_le16(len);
100 /* data are already in little-endian order */
101 memcpy(databuf, pdata, len);
102 usb_fill_control_urb(urb, udev, pipe,
103 (unsigned char *)dr, databuf, len,
104 usbctrl_async_callback, NULL);
105 rc = usb_submit_urb(urb, GFP_ATOMIC);
106 if (rc < 0) {
107 kfree(databuf);
108 kfree(dr);
109 }
110 usb_free_urb(urb);
111 return rc;
112 }
113
114 static int _usbctrl_vendorreq_sync_read(struct usb_device *udev, u8 request,
115 u16 value, u16 index, void *pdata,
116 u16 len)
117 {
118 unsigned int pipe;
119 int status;
120 u8 reqtype;
121 int vendorreq_times = 0;
122 static int count;
123
124 pipe = usb_rcvctrlpipe(udev, 0); /* read_in */
125 reqtype = REALTEK_USB_VENQT_READ;
126
127 do {
128 status = usb_control_msg(udev, pipe, request, reqtype, value,
129 index, pdata, len, 1000);
130 if (status < 0) {
131 /* firmware download is checksumed, don't retry */
132 if ((value >= FW_8192C_START_ADDRESS &&
133 value <= FW_8192C_END_ADDRESS))
134 break;
135 } else {
136 break;
137 }
138 } while (++vendorreq_times < MAX_USBCTRL_VENDORREQ_TIMES);
139
140 if (status < 0 && count++ < 4)
141 pr_err("reg 0x%x, usbctrl_vendorreq TimeOut! status:0x%x value=0x%x\n",
142 value, status, *(u32 *)pdata);
143 return status;
144 }
145
146 static u32 _usb_read_sync(struct rtl_priv *rtlpriv, u32 addr, u16 len)
147 {
148 struct device *dev = rtlpriv->io.dev;
149 struct usb_device *udev = to_usb_device(dev);
150 u8 request;
151 u16 wvalue;
152 u16 index;
153 __le32 *data;
154 unsigned long flags;
155
156 spin_lock_irqsave(&rtlpriv->locks.usb_lock, flags);
157 if (++rtlpriv->usb_data_index >= RTL_USB_MAX_RX_COUNT)
158 rtlpriv->usb_data_index = 0;
159 data = &rtlpriv->usb_data[rtlpriv->usb_data_index];
160 spin_unlock_irqrestore(&rtlpriv->locks.usb_lock, flags);
161 request = REALTEK_USB_VENQT_CMD_REQ;
162 index = REALTEK_USB_VENQT_CMD_IDX; /* n/a */
163
164 wvalue = (u16)addr;
165 _usbctrl_vendorreq_sync_read(udev, request, wvalue, index, data, len);
166 return le32_to_cpu(*data);
167 }
168
169 static u8 _usb_read8_sync(struct rtl_priv *rtlpriv, u32 addr)
170 {
171 return (u8)_usb_read_sync(rtlpriv, addr, 1);
172 }
173
174 static u16 _usb_read16_sync(struct rtl_priv *rtlpriv, u32 addr)
175 {
176 return (u16)_usb_read_sync(rtlpriv, addr, 2);
177 }
178
179 static u32 _usb_read32_sync(struct rtl_priv *rtlpriv, u32 addr)
180 {
181 return _usb_read_sync(rtlpriv, addr, 4);
182 }
183
184 static void _usb_write_async(struct usb_device *udev, u32 addr, u32 val,
185 u16 len)
186 {
187 u8 request;
188 u16 wvalue;
189 u16 index;
190 __le32 data;
191
192 request = REALTEK_USB_VENQT_CMD_REQ;
193 index = REALTEK_USB_VENQT_CMD_IDX; /* n/a */
194 wvalue = (u16)(addr&0x0000ffff);
195 data = cpu_to_le32(val);
196 _usbctrl_vendorreq_async_write(udev, request, wvalue, index, &data,
197 len);
198 }
199
200 static void _usb_write8_async(struct rtl_priv *rtlpriv, u32 addr, u8 val)
201 {
202 struct device *dev = rtlpriv->io.dev;
203
204 _usb_write_async(to_usb_device(dev), addr, val, 1);
205 }
206
207 static void _usb_write16_async(struct rtl_priv *rtlpriv, u32 addr, u16 val)
208 {
209 struct device *dev = rtlpriv->io.dev;
210
211 _usb_write_async(to_usb_device(dev), addr, val, 2);
212 }
213
214 static void _usb_write32_async(struct rtl_priv *rtlpriv, u32 addr, u32 val)
215 {
216 struct device *dev = rtlpriv->io.dev;
217
218 _usb_write_async(to_usb_device(dev), addr, val, 4);
219 }
220
221 static void _usb_writeN_sync(struct rtl_priv *rtlpriv, u32 addr, void *data,
222 u16 len)
223 {
224 struct device *dev = rtlpriv->io.dev;
225 struct usb_device *udev = to_usb_device(dev);
226 u8 request = REALTEK_USB_VENQT_CMD_REQ;
227 u8 reqtype = REALTEK_USB_VENQT_WRITE;
228 u16 wvalue;
229 u16 index = REALTEK_USB_VENQT_CMD_IDX;
230 int pipe = usb_sndctrlpipe(udev, 0); /* write_out */
231 u8 *buffer;
232
233 wvalue = (u16)(addr & 0x0000ffff);
234 buffer = kmemdup(data, len, GFP_ATOMIC);
235 if (!buffer)
236 return;
237 usb_control_msg(udev, pipe, request, reqtype, wvalue,
238 index, buffer, len, 50);
239
240 kfree(buffer);
241 }
242
243 static void _rtl_usb_io_handler_init(struct device *dev,
244 struct ieee80211_hw *hw)
245 {
246 struct rtl_priv *rtlpriv = rtl_priv(hw);
247
248 rtlpriv->io.dev = dev;
249 mutex_init(&rtlpriv->io.bb_mutex);
250 rtlpriv->io.write8_async = _usb_write8_async;
251 rtlpriv->io.write16_async = _usb_write16_async;
252 rtlpriv->io.write32_async = _usb_write32_async;
253 rtlpriv->io.read8_sync = _usb_read8_sync;
254 rtlpriv->io.read16_sync = _usb_read16_sync;
255 rtlpriv->io.read32_sync = _usb_read32_sync;
256 rtlpriv->io.writeN_sync = _usb_writeN_sync;
257 }
258
259 static void _rtl_usb_io_handler_release(struct ieee80211_hw *hw)
260 {
261 struct rtl_priv __maybe_unused *rtlpriv = rtl_priv(hw);
262
263 mutex_destroy(&rtlpriv->io.bb_mutex);
264 }
265
266 /**
267 *
268 * Default aggregation handler. Do nothing and just return the oldest skb.
269 */
270 static struct sk_buff *_none_usb_tx_aggregate_hdl(struct ieee80211_hw *hw,
271 struct sk_buff_head *list)
272 {
273 return skb_dequeue(list);
274 }
275
276 #define IS_HIGH_SPEED_USB(udev) \
277 ((USB_SPEED_HIGH == (udev)->speed) ? true : false)
278
279 static int _rtl_usb_init_tx(struct ieee80211_hw *hw)
280 {
281 u32 i;
282 struct rtl_priv *rtlpriv = rtl_priv(hw);
283 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
284
285 rtlusb->max_bulk_out_size = IS_HIGH_SPEED_USB(rtlusb->udev)
286 ? USB_HIGH_SPEED_BULK_SIZE
287 : USB_FULL_SPEED_BULK_SIZE;
288
289 RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG, "USB Max Bulk-out Size=%d\n",
290 rtlusb->max_bulk_out_size);
291
292 for (i = 0; i < __RTL_TXQ_NUM; i++) {
293 u32 ep_num = rtlusb->ep_map.ep_mapping[i];
294 if (!ep_num) {
295 RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG,
296 "Invalid endpoint map setting!\n");
297 return -EINVAL;
298 }
299 }
300
301 rtlusb->usb_tx_post_hdl =
302 rtlpriv->cfg->usb_interface_cfg->usb_tx_post_hdl;
303 rtlusb->usb_tx_cleanup =
304 rtlpriv->cfg->usb_interface_cfg->usb_tx_cleanup;
305 rtlusb->usb_tx_aggregate_hdl =
306 (rtlpriv->cfg->usb_interface_cfg->usb_tx_aggregate_hdl)
307 ? rtlpriv->cfg->usb_interface_cfg->usb_tx_aggregate_hdl
308 : &_none_usb_tx_aggregate_hdl;
309
310 init_usb_anchor(&rtlusb->tx_submitted);
311 for (i = 0; i < RTL_USB_MAX_EP_NUM; i++) {
312 skb_queue_head_init(&rtlusb->tx_skb_queue[i]);
313 init_usb_anchor(&rtlusb->tx_pending[i]);
314 }
315 return 0;
316 }
317
318 static void _rtl_rx_work(unsigned long param);
319
320 static int _rtl_usb_init_rx(struct ieee80211_hw *hw)
321 {
322 struct rtl_priv *rtlpriv = rtl_priv(hw);
323 struct rtl_usb_priv *usb_priv = rtl_usbpriv(hw);
324 struct rtl_usb *rtlusb = rtl_usbdev(usb_priv);
325
326 rtlusb->rx_max_size = rtlpriv->cfg->usb_interface_cfg->rx_max_size;
327 rtlusb->rx_urb_num = rtlpriv->cfg->usb_interface_cfg->rx_urb_num;
328 rtlusb->in_ep = rtlpriv->cfg->usb_interface_cfg->in_ep_num;
329 rtlusb->usb_rx_hdl = rtlpriv->cfg->usb_interface_cfg->usb_rx_hdl;
330 rtlusb->usb_rx_segregate_hdl =
331 rtlpriv->cfg->usb_interface_cfg->usb_rx_segregate_hdl;
332
333 pr_info("rx_max_size %d, rx_urb_num %d, in_ep %d\n",
334 rtlusb->rx_max_size, rtlusb->rx_urb_num, rtlusb->in_ep);
335 init_usb_anchor(&rtlusb->rx_submitted);
336 init_usb_anchor(&rtlusb->rx_cleanup_urbs);
337
338 skb_queue_head_init(&rtlusb->rx_queue);
339 rtlusb->rx_work_tasklet.func = _rtl_rx_work;
340 rtlusb->rx_work_tasklet.data = (unsigned long)rtlusb;
341
342 return 0;
343 }
344
345 static int _rtl_usb_init(struct ieee80211_hw *hw)
346 {
347 struct rtl_priv *rtlpriv = rtl_priv(hw);
348 struct rtl_usb_priv *usb_priv = rtl_usbpriv(hw);
349 struct rtl_usb *rtlusb = rtl_usbdev(usb_priv);
350 int err;
351 u8 epidx;
352 struct usb_interface *usb_intf = rtlusb->intf;
353 u8 epnums = usb_intf->cur_altsetting->desc.bNumEndpoints;
354
355 rtlusb->out_ep_nums = rtlusb->in_ep_nums = 0;
356 for (epidx = 0; epidx < epnums; epidx++) {
357 struct usb_endpoint_descriptor *pep_desc;
358 pep_desc = &usb_intf->cur_altsetting->endpoint[epidx].desc;
359
360 if (usb_endpoint_dir_in(pep_desc))
361 rtlusb->in_ep_nums++;
362 else if (usb_endpoint_dir_out(pep_desc))
363 rtlusb->out_ep_nums++;
364
365 RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG,
366 "USB EP(0x%02x), MaxPacketSize=%d, Interval=%d\n",
367 pep_desc->bEndpointAddress, pep_desc->wMaxPacketSize,
368 pep_desc->bInterval);
369 }
370 if (rtlusb->in_ep_nums < rtlpriv->cfg->usb_interface_cfg->in_ep_num) {
371 pr_err("Too few input end points found\n");
372 return -EINVAL;
373 }
374 if (rtlusb->out_ep_nums == 0) {
375 pr_err("No output end points found\n");
376 return -EINVAL;
377 }
378 /* usb endpoint mapping */
379 err = rtlpriv->cfg->usb_interface_cfg->usb_endpoint_mapping(hw);
380 rtlusb->usb_mq_to_hwq = rtlpriv->cfg->usb_interface_cfg->usb_mq_to_hwq;
381 _rtl_usb_init_tx(hw);
382 _rtl_usb_init_rx(hw);
383 return err;
384 }
385
386 static void rtl_usb_init_sw(struct ieee80211_hw *hw)
387 {
388 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
389 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
390 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
391 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
392
393 rtlhal->hw = hw;
394 ppsc->inactiveps = false;
395 ppsc->leisure_ps = false;
396 ppsc->fwctrl_lps = false;
397 ppsc->reg_fwctrl_lps = 3;
398 ppsc->reg_max_lps_awakeintvl = 5;
399 ppsc->fwctrl_psmode = FW_PS_DTIM_MODE;
400
401 /* IBSS */
402 mac->beacon_interval = 100;
403
404 /* AMPDU */
405 mac->min_space_cfg = 0;
406 mac->max_mss_density = 0;
407
408 /* set sane AMPDU defaults */
409 mac->current_ampdu_density = 7;
410 mac->current_ampdu_factor = 3;
411
412 /* QOS */
413 rtlusb->acm_method = EACMWAY2_SW;
414
415 /* IRQ */
416 /* HIMR - turn all on */
417 rtlusb->irq_mask[0] = 0xFFFFFFFF;
418 /* HIMR_EX - turn all on */
419 rtlusb->irq_mask[1] = 0xFFFFFFFF;
420 rtlusb->disableHWSM = true;
421 }
422
423 static void _rtl_rx_completed(struct urb *urb);
424
425 static int _rtl_prep_rx_urb(struct ieee80211_hw *hw, struct rtl_usb *rtlusb,
426 struct urb *urb, gfp_t gfp_mask)
427 {
428 struct rtl_priv *rtlpriv = rtl_priv(hw);
429 void *buf;
430
431 buf = usb_alloc_coherent(rtlusb->udev, rtlusb->rx_max_size, gfp_mask,
432 &urb->transfer_dma);
433 if (!buf) {
434 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
435 "Failed to usb_alloc_coherent!!\n");
436 return -ENOMEM;
437 }
438
439 usb_fill_bulk_urb(urb, rtlusb->udev,
440 usb_rcvbulkpipe(rtlusb->udev, rtlusb->in_ep),
441 buf, rtlusb->rx_max_size, _rtl_rx_completed, rtlusb);
442 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
443
444 return 0;
445 }
446
447 static void _rtl_usb_rx_process_agg(struct ieee80211_hw *hw,
448 struct sk_buff *skb)
449 {
450 struct rtl_priv *rtlpriv = rtl_priv(hw);
451 u8 *rxdesc = skb->data;
452 struct ieee80211_hdr *hdr;
453 bool unicast = false;
454 __le16 fc;
455 struct ieee80211_rx_status rx_status = {0};
456 struct rtl_stats stats = {
457 .signal = 0,
458 .rate = 0,
459 };
460
461 skb_pull(skb, RTL_RX_DESC_SIZE);
462 rtlpriv->cfg->ops->query_rx_desc(hw, &stats, &rx_status, rxdesc, skb);
463 skb_pull(skb, (stats.rx_drvinfo_size + stats.rx_bufshift));
464 hdr = (struct ieee80211_hdr *)(skb->data);
465 fc = hdr->frame_control;
466 if (!stats.crc) {
467 memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
468
469 if (is_broadcast_ether_addr(hdr->addr1)) {
470 /*TODO*/;
471 } else if (is_multicast_ether_addr(hdr->addr1)) {
472 /*TODO*/
473 } else {
474 unicast = true;
475 rtlpriv->stats.rxbytesunicast += skb->len;
476 }
477
478 if (ieee80211_is_data(fc)) {
479 rtlpriv->cfg->ops->led_control(hw, LED_CTL_RX);
480
481 if (unicast)
482 rtlpriv->link_info.num_rx_inperiod++;
483 }
484 /* static bcn for roaming */
485 rtl_beacon_statistic(hw, skb);
486 }
487 }
488
489 static void _rtl_usb_rx_process_noagg(struct ieee80211_hw *hw,
490 struct sk_buff *skb)
491 {
492 struct rtl_priv *rtlpriv = rtl_priv(hw);
493 u8 *rxdesc = skb->data;
494 struct ieee80211_hdr *hdr;
495 bool unicast = false;
496 __le16 fc;
497 struct ieee80211_rx_status rx_status = {0};
498 struct rtl_stats stats = {
499 .signal = 0,
500 .rate = 0,
501 };
502
503 skb_pull(skb, RTL_RX_DESC_SIZE);
504 rtlpriv->cfg->ops->query_rx_desc(hw, &stats, &rx_status, rxdesc, skb);
505 skb_pull(skb, (stats.rx_drvinfo_size + stats.rx_bufshift));
506 hdr = (struct ieee80211_hdr *)(skb->data);
507 fc = hdr->frame_control;
508 if (!stats.crc) {
509 memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
510
511 if (is_broadcast_ether_addr(hdr->addr1)) {
512 /*TODO*/;
513 } else if (is_multicast_ether_addr(hdr->addr1)) {
514 /*TODO*/
515 } else {
516 unicast = true;
517 rtlpriv->stats.rxbytesunicast += skb->len;
518 }
519
520 if (ieee80211_is_data(fc)) {
521 rtlpriv->cfg->ops->led_control(hw, LED_CTL_RX);
522
523 if (unicast)
524 rtlpriv->link_info.num_rx_inperiod++;
525 }
526
527 /* static bcn for roaming */
528 rtl_beacon_statistic(hw, skb);
529
530 if (likely(rtl_action_proc(hw, skb, false)))
531 ieee80211_rx(hw, skb);
532 else
533 dev_kfree_skb_any(skb);
534 }
535 }
536
537 static void _rtl_rx_pre_process(struct ieee80211_hw *hw, struct sk_buff *skb)
538 {
539 struct sk_buff *_skb;
540 struct sk_buff_head rx_queue;
541 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
542
543 skb_queue_head_init(&rx_queue);
544 if (rtlusb->usb_rx_segregate_hdl)
545 rtlusb->usb_rx_segregate_hdl(hw, skb, &rx_queue);
546 WARN_ON(skb_queue_empty(&rx_queue));
547 while (!skb_queue_empty(&rx_queue)) {
548 _skb = skb_dequeue(&rx_queue);
549 _rtl_usb_rx_process_agg(hw, _skb);
550 ieee80211_rx(hw, _skb);
551 }
552 }
553
554 #define __RX_SKB_MAX_QUEUED 64
555
556 static void _rtl_rx_work(unsigned long param)
557 {
558 struct rtl_usb *rtlusb = (struct rtl_usb *)param;
559 struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf);
560 struct sk_buff *skb;
561
562 while ((skb = skb_dequeue(&rtlusb->rx_queue))) {
563 if (unlikely(IS_USB_STOP(rtlusb))) {
564 dev_kfree_skb_any(skb);
565 continue;
566 }
567
568 if (likely(!rtlusb->usb_rx_segregate_hdl)) {
569 _rtl_usb_rx_process_noagg(hw, skb);
570 } else {
571 /* TO DO */
572 _rtl_rx_pre_process(hw, skb);
573 pr_err("rx agg not supported\n");
574 }
575 }
576 }
577
578 static unsigned int _rtl_rx_get_padding(struct ieee80211_hdr *hdr,
579 unsigned int len)
580 {
581 #if NET_IP_ALIGN != 0
582 unsigned int padding = 0;
583 #endif
584
585 /* make function no-op when possible */
586 if (NET_IP_ALIGN == 0 || len < sizeof(*hdr))
587 return 0;
588
589 #if NET_IP_ALIGN != 0
590 /* alignment calculation as in lbtf_rx() / carl9170_rx_copy_data() */
591 /* TODO: deduplicate common code, define helper function instead? */
592
593 if (ieee80211_is_data_qos(hdr->frame_control)) {
594 u8 *qc = ieee80211_get_qos_ctl(hdr);
595
596 padding ^= NET_IP_ALIGN;
597
598 /* Input might be invalid, avoid accessing memory outside
599 * the buffer.
600 */
601 if ((unsigned long)qc - (unsigned long)hdr < len &&
602 *qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT)
603 padding ^= NET_IP_ALIGN;
604 }
605
606 if (ieee80211_has_a4(hdr->frame_control))
607 padding ^= NET_IP_ALIGN;
608
609 return padding;
610 #endif
611 }
612
613 #define __RADIO_TAP_SIZE_RSV 32
614
615 static void _rtl_rx_completed(struct urb *_urb)
616 {
617 struct rtl_usb *rtlusb = (struct rtl_usb *)_urb->context;
618 struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf);
619 struct rtl_priv *rtlpriv = rtl_priv(hw);
620 int err = 0;
621
622 if (unlikely(IS_USB_STOP(rtlusb)))
623 goto free;
624
625 if (likely(0 == _urb->status)) {
626 unsigned int padding;
627 struct sk_buff *skb;
628 unsigned int qlen;
629 unsigned int size = _urb->actual_length;
630 struct ieee80211_hdr *hdr;
631
632 if (size < RTL_RX_DESC_SIZE + sizeof(struct ieee80211_hdr)) {
633 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
634 "Too short packet from bulk IN! (len: %d)\n",
635 size);
636 goto resubmit;
637 }
638
639 qlen = skb_queue_len(&rtlusb->rx_queue);
640 if (qlen >= __RX_SKB_MAX_QUEUED) {
641 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
642 "Pending RX skbuff queue full! (qlen: %d)\n",
643 qlen);
644 goto resubmit;
645 }
646
647 hdr = (void *)(_urb->transfer_buffer + RTL_RX_DESC_SIZE);
648 padding = _rtl_rx_get_padding(hdr, size - RTL_RX_DESC_SIZE);
649
650 skb = dev_alloc_skb(size + __RADIO_TAP_SIZE_RSV + padding);
651 if (!skb) {
652 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
653 "Can't allocate skb for bulk IN!\n");
654 goto resubmit;
655 }
656
657 _rtl_install_trx_info(rtlusb, skb, rtlusb->in_ep);
658
659 /* Make sure the payload data is 4 byte aligned. */
660 skb_reserve(skb, padding);
661
662 /* reserve some space for mac80211's radiotap */
663 skb_reserve(skb, __RADIO_TAP_SIZE_RSV);
664
665 memcpy(skb_put(skb, size), _urb->transfer_buffer, size);
666
667 skb_queue_tail(&rtlusb->rx_queue, skb);
668 tasklet_schedule(&rtlusb->rx_work_tasklet);
669
670 goto resubmit;
671 }
672
673 switch (_urb->status) {
674 /* disconnect */
675 case -ENOENT:
676 case -ECONNRESET:
677 case -ENODEV:
678 case -ESHUTDOWN:
679 goto free;
680 default:
681 break;
682 }
683
684 resubmit:
685 usb_anchor_urb(_urb, &rtlusb->rx_submitted);
686 err = usb_submit_urb(_urb, GFP_ATOMIC);
687 if (unlikely(err)) {
688 usb_unanchor_urb(_urb);
689 goto free;
690 }
691 return;
692
693 free:
694 /* On some architectures, usb_free_coherent must not be called from
695 * hardirq context. Queue urb to cleanup list.
696 */
697 usb_anchor_urb(_urb, &rtlusb->rx_cleanup_urbs);
698 }
699
700 #undef __RADIO_TAP_SIZE_RSV
701
702 static void _rtl_usb_cleanup_rx(struct ieee80211_hw *hw)
703 {
704 struct rtl_priv *rtlpriv = rtl_priv(hw);
705 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
706 struct urb *urb;
707
708 usb_kill_anchored_urbs(&rtlusb->rx_submitted);
709
710 tasklet_kill(&rtlusb->rx_work_tasklet);
711 cancel_work_sync(&rtlpriv->works.lps_change_work);
712
713 flush_workqueue(rtlpriv->works.rtl_wq);
714 destroy_workqueue(rtlpriv->works.rtl_wq);
715
716 skb_queue_purge(&rtlusb->rx_queue);
717
718 while ((urb = usb_get_from_anchor(&rtlusb->rx_cleanup_urbs))) {
719 usb_free_coherent(urb->dev, urb->transfer_buffer_length,
720 urb->transfer_buffer, urb->transfer_dma);
721 usb_free_urb(urb);
722 }
723 }
724
725 static int _rtl_usb_receive(struct ieee80211_hw *hw)
726 {
727 struct urb *urb;
728 int err;
729 int i;
730 struct rtl_priv *rtlpriv = rtl_priv(hw);
731 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
732
733 WARN_ON(0 == rtlusb->rx_urb_num);
734 /* 1600 == 1514 + max WLAN header + rtk info */
735 WARN_ON(rtlusb->rx_max_size < 1600);
736
737 for (i = 0; i < rtlusb->rx_urb_num; i++) {
738 err = -ENOMEM;
739 urb = usb_alloc_urb(0, GFP_KERNEL);
740 if (!urb) {
741 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
742 "Failed to alloc URB!!\n");
743 goto err_out;
744 }
745
746 err = _rtl_prep_rx_urb(hw, rtlusb, urb, GFP_KERNEL);
747 if (err < 0) {
748 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
749 "Failed to prep_rx_urb!!\n");
750 usb_free_urb(urb);
751 goto err_out;
752 }
753
754 usb_anchor_urb(urb, &rtlusb->rx_submitted);
755 err = usb_submit_urb(urb, GFP_KERNEL);
756 if (err)
757 goto err_out;
758 usb_free_urb(urb);
759 }
760 return 0;
761
762 err_out:
763 usb_kill_anchored_urbs(&rtlusb->rx_submitted);
764 _rtl_usb_cleanup_rx(hw);
765 return err;
766 }
767
768 static int rtl_usb_start(struct ieee80211_hw *hw)
769 {
770 int err;
771 struct rtl_priv *rtlpriv = rtl_priv(hw);
772 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
773 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
774
775 err = rtlpriv->cfg->ops->hw_init(hw);
776 if (!err) {
777 rtl_init_rx_config(hw);
778
779 /* Enable software */
780 SET_USB_START(rtlusb);
781 /* should after adapter start and interrupt enable. */
782 set_hal_start(rtlhal);
783
784 /* Start bulk IN */
785 err = _rtl_usb_receive(hw);
786 }
787
788 return err;
789 }
790 /**
791 *
792 *
793 */
794
795 /*======================= tx =========================================*/
796 static void rtl_usb_cleanup(struct ieee80211_hw *hw)
797 {
798 u32 i;
799 struct sk_buff *_skb;
800 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
801 struct ieee80211_tx_info *txinfo;
802
803 /* clean up rx stuff. */
804 _rtl_usb_cleanup_rx(hw);
805
806 /* clean up tx stuff */
807 for (i = 0; i < RTL_USB_MAX_EP_NUM; i++) {
808 while ((_skb = skb_dequeue(&rtlusb->tx_skb_queue[i]))) {
809 rtlusb->usb_tx_cleanup(hw, _skb);
810 txinfo = IEEE80211_SKB_CB(_skb);
811 ieee80211_tx_info_clear_status(txinfo);
812 txinfo->flags |= IEEE80211_TX_STAT_ACK;
813 ieee80211_tx_status_irqsafe(hw, _skb);
814 }
815 usb_kill_anchored_urbs(&rtlusb->tx_pending[i]);
816 }
817 usb_kill_anchored_urbs(&rtlusb->tx_submitted);
818 }
819
820 /**
821 *
822 * We may add some struct into struct rtl_usb later. Do deinit here.
823 *
824 */
825 static void rtl_usb_deinit(struct ieee80211_hw *hw)
826 {
827 rtl_usb_cleanup(hw);
828 }
829
830 static void rtl_usb_stop(struct ieee80211_hw *hw)
831 {
832 struct rtl_priv *rtlpriv = rtl_priv(hw);
833 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
834 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
835
836 /* should after adapter start and interrupt enable. */
837 set_hal_stop(rtlhal);
838 cancel_work_sync(&rtlpriv->works.fill_h2c_cmd);
839 /* Enable software */
840 SET_USB_STOP(rtlusb);
841 rtlpriv->cfg->ops->hw_disable(hw);
842 }
843
844 static void _rtl_submit_tx_urb(struct ieee80211_hw *hw, struct urb *_urb)
845 {
846 int err;
847 struct rtl_priv *rtlpriv = rtl_priv(hw);
848 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
849
850 usb_anchor_urb(_urb, &rtlusb->tx_submitted);
851 err = usb_submit_urb(_urb, GFP_ATOMIC);
852 if (err < 0) {
853 struct sk_buff *skb;
854
855 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
856 "Failed to submit urb\n");
857 usb_unanchor_urb(_urb);
858 skb = (struct sk_buff *)_urb->context;
859 kfree_skb(skb);
860 }
861 usb_free_urb(_urb);
862 }
863
864 static int _usb_tx_post(struct ieee80211_hw *hw, struct urb *urb,
865 struct sk_buff *skb)
866 {
867 struct rtl_priv *rtlpriv = rtl_priv(hw);
868 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
869 struct ieee80211_tx_info *txinfo;
870
871 rtlusb->usb_tx_post_hdl(hw, urb, skb);
872 skb_pull(skb, RTL_TX_HEADER_SIZE);
873 txinfo = IEEE80211_SKB_CB(skb);
874 ieee80211_tx_info_clear_status(txinfo);
875 txinfo->flags |= IEEE80211_TX_STAT_ACK;
876
877 if (urb->status) {
878 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
879 "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_priv *rtlpriv = rtl_priv(hw);
909 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
910 struct urb *_urb;
911
912 WARN_ON(NULL == skb);
913 _urb = usb_alloc_urb(0, GFP_ATOMIC);
914 if (!_urb) {
915 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
916 "Can't allocate URB for bulk out!\n");
917 kfree_skb(skb);
918 return NULL;
919 }
920 _rtl_install_trx_info(rtlusb, skb, ep_num);
921 usb_fill_bulk_urb(_urb, rtlusb->udev, usb_sndbulkpipe(rtlusb->udev,
922 ep_num), skb->data, skb->len, _rtl_tx_complete, skb);
923 _urb->transfer_flags |= URB_ZERO_PACKET;
924 return _urb;
925 }
926
927 static void _rtl_usb_transmit(struct ieee80211_hw *hw, struct sk_buff *skb,
928 enum rtl_txq qnum)
929 {
930 struct rtl_priv *rtlpriv = rtl_priv(hw);
931 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
932 u32 ep_num;
933 struct urb *_urb = NULL;
934 struct sk_buff *_skb = NULL;
935
936 WARN_ON(NULL == rtlusb->usb_tx_aggregate_hdl);
937 if (unlikely(IS_USB_STOP(rtlusb))) {
938 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
939 "USB device is stopping...\n");
940 kfree_skb(skb);
941 return;
942 }
943 ep_num = rtlusb->ep_map.ep_mapping[qnum];
944 _skb = skb;
945 _urb = _rtl_usb_tx_urb_setup(hw, _skb, ep_num);
946 if (unlikely(!_urb)) {
947 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG,
948 "Can't allocate urb. Drop skb!\n");
949 kfree_skb(skb);
950 return;
951 }
952 _rtl_submit_tx_urb(hw, _urb);
953 }
954
955 static void _rtl_usb_tx_preprocess(struct ieee80211_hw *hw,
956 struct ieee80211_sta *sta,
957 struct sk_buff *skb,
958 u16 hw_queue)
959 {
960 struct rtl_priv *rtlpriv = rtl_priv(hw);
961 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
962 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
963 struct rtl_tx_desc *pdesc = NULL;
964 struct rtl_tcb_desc tcb_desc;
965 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
966 __le16 fc = hdr->frame_control;
967 u8 *pda_addr = hdr->addr1;
968 /* ssn */
969 u8 *qc = NULL;
970 u8 tid = 0;
971 u16 seq_number = 0;
972
973 memset(&tcb_desc, 0, sizeof(struct rtl_tcb_desc));
974 if (ieee80211_is_auth(fc)) {
975 RT_TRACE(rtlpriv, COMP_SEND, DBG_DMESG, "MAC80211_LINKING\n");
976 rtl_ips_nic_on(hw);
977 }
978
979 if (rtlpriv->psc.sw_ps_enabled) {
980 if (ieee80211_is_data(fc) && !ieee80211_is_nullfunc(fc) &&
981 !ieee80211_has_pm(fc))
982 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
983 }
984
985 rtl_action_proc(hw, skb, true);
986 if (is_multicast_ether_addr(pda_addr))
987 rtlpriv->stats.txbytesmulticast += skb->len;
988 else if (is_broadcast_ether_addr(pda_addr))
989 rtlpriv->stats.txbytesbroadcast += skb->len;
990 else
991 rtlpriv->stats.txbytesunicast += skb->len;
992 if (ieee80211_is_data_qos(fc)) {
993 qc = ieee80211_get_qos_ctl(hdr);
994 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
995 seq_number = (le16_to_cpu(hdr->seq_ctrl) &
996 IEEE80211_SCTL_SEQ) >> 4;
997 seq_number += 1;
998 seq_number <<= 4;
999 }
1000 rtlpriv->cfg->ops->fill_tx_desc(hw, hdr, (u8 *)pdesc, NULL, info, sta, skb,
1001 hw_queue, &tcb_desc);
1002 if (!ieee80211_has_morefrags(hdr->frame_control)) {
1003 if (qc)
1004 mac->tids[tid].seq_number = seq_number;
1005 }
1006 if (ieee80211_is_data(fc))
1007 rtlpriv->cfg->ops->led_control(hw, LED_CTL_TX);
1008 }
1009
1010 static int rtl_usb_tx(struct ieee80211_hw *hw,
1011 struct ieee80211_sta *sta,
1012 struct sk_buff *skb,
1013 struct rtl_tcb_desc *dummy)
1014 {
1015 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
1016 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
1017 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
1018 __le16 fc = hdr->frame_control;
1019 u16 hw_queue;
1020
1021 if (unlikely(is_hal_stop(rtlhal)))
1022 goto err_free;
1023 hw_queue = rtlusb->usb_mq_to_hwq(fc, skb_get_queue_mapping(skb));
1024 _rtl_usb_tx_preprocess(hw, sta, skb, hw_queue);
1025 _rtl_usb_transmit(hw, skb, hw_queue);
1026 return NETDEV_TX_OK;
1027
1028 err_free:
1029 dev_kfree_skb_any(skb);
1030 return NETDEV_TX_OK;
1031 }
1032
1033 static bool rtl_usb_tx_chk_waitq_insert(struct ieee80211_hw *hw,
1034 struct ieee80211_sta *sta,
1035 struct sk_buff *skb)
1036 {
1037 return false;
1038 }
1039
1040 static void rtl_fill_h2c_cmd_work_callback(struct work_struct *work)
1041 {
1042 struct rtl_works *rtlworks =
1043 container_of(work, struct rtl_works, fill_h2c_cmd);
1044 struct ieee80211_hw *hw = rtlworks->hw;
1045 struct rtl_priv *rtlpriv = rtl_priv(hw);
1046
1047 rtlpriv->cfg->ops->fill_h2c_cmd(hw, H2C_RA_MASK, 5, rtlpriv->rate_mask);
1048 }
1049
1050 static struct rtl_intf_ops rtl_usb_ops = {
1051 .adapter_start = rtl_usb_start,
1052 .adapter_stop = rtl_usb_stop,
1053 .adapter_tx = rtl_usb_tx,
1054 .waitq_insert = rtl_usb_tx_chk_waitq_insert,
1055 };
1056
1057 int rtl_usb_probe(struct usb_interface *intf,
1058 const struct usb_device_id *id,
1059 struct rtl_hal_cfg *rtl_hal_cfg)
1060 {
1061 int err;
1062 struct ieee80211_hw *hw = NULL;
1063 struct rtl_priv *rtlpriv = NULL;
1064 struct usb_device *udev;
1065 struct rtl_usb_priv *usb_priv;
1066
1067 hw = ieee80211_alloc_hw(sizeof(struct rtl_priv) +
1068 sizeof(struct rtl_usb_priv), &rtl_ops);
1069 if (!hw) {
1070 RT_ASSERT(false, "ieee80211 alloc failed\n");
1071 return -ENOMEM;
1072 }
1073 rtlpriv = hw->priv;
1074 rtlpriv->usb_data = kzalloc(RTL_USB_MAX_RX_COUNT * sizeof(u32),
1075 GFP_KERNEL);
1076 if (!rtlpriv->usb_data)
1077 return -ENOMEM;
1078
1079 /* this spin lock must be initialized early */
1080 spin_lock_init(&rtlpriv->locks.usb_lock);
1081 INIT_WORK(&rtlpriv->works.fill_h2c_cmd,
1082 rtl_fill_h2c_cmd_work_callback);
1083 INIT_WORK(&rtlpriv->works.lps_change_work,
1084 rtl_lps_change_work_callback);
1085
1086 rtlpriv->usb_data_index = 0;
1087 init_completion(&rtlpriv->firmware_loading_complete);
1088 SET_IEEE80211_DEV(hw, &intf->dev);
1089 udev = interface_to_usbdev(intf);
1090 usb_get_dev(udev);
1091 usb_priv = rtl_usbpriv(hw);
1092 memset(usb_priv, 0, sizeof(*usb_priv));
1093 usb_priv->dev.intf = intf;
1094 usb_priv->dev.udev = udev;
1095 usb_set_intfdata(intf, hw);
1096 /* init cfg & intf_ops */
1097 rtlpriv->rtlhal.interface = INTF_USB;
1098 rtlpriv->cfg = rtl_hal_cfg;
1099 rtlpriv->intf_ops = &rtl_usb_ops;
1100 rtl_dbgp_flag_init(hw);
1101 /* Init IO handler */
1102 _rtl_usb_io_handler_init(&udev->dev, hw);
1103 rtlpriv->cfg->ops->read_chip_version(hw);
1104 /*like read eeprom and so on */
1105 rtlpriv->cfg->ops->read_eeprom_info(hw);
1106 err = _rtl_usb_init(hw);
1107 if (err)
1108 goto error_out;
1109 rtl_usb_init_sw(hw);
1110 /* Init mac80211 sw */
1111 err = rtl_init_core(hw);
1112 if (err) {
1113 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG,
1114 "Can't allocate sw for mac80211\n");
1115 goto error_out;
1116 }
1117 if (rtlpriv->cfg->ops->init_sw_vars(hw)) {
1118 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG, "Can't init_sw_vars\n");
1119 goto error_out;
1120 }
1121 rtlpriv->cfg->ops->init_sw_leds(hw);
1122
1123 err = ieee80211_register_hw(hw);
1124 if (err) {
1125 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG,
1126 "Can't register mac80211 hw.\n");
1127 err = -ENODEV;
1128 goto error_out;
1129 }
1130 rtlpriv->mac80211.mac80211_registered = 1;
1131
1132 set_bit(RTL_STATUS_INTERFACE_START, &rtlpriv->status);
1133 return 0;
1134
1135 error_out:
1136 rtl_deinit_core(hw);
1137 _rtl_usb_io_handler_release(hw);
1138 usb_put_dev(udev);
1139 complete(&rtlpriv->firmware_loading_complete);
1140 return -ENODEV;
1141 }
1142 EXPORT_SYMBOL(rtl_usb_probe);
1143
1144 void rtl_usb_disconnect(struct usb_interface *intf)
1145 {
1146 struct ieee80211_hw *hw = usb_get_intfdata(intf);
1147 struct rtl_priv *rtlpriv = rtl_priv(hw);
1148 struct rtl_mac *rtlmac = rtl_mac(rtl_priv(hw));
1149 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
1150
1151 if (unlikely(!rtlpriv))
1152 return;
1153 /* just in case driver is removed before firmware callback */
1154 wait_for_completion(&rtlpriv->firmware_loading_complete);
1155 clear_bit(RTL_STATUS_INTERFACE_START, &rtlpriv->status);
1156 /*ieee80211_unregister_hw will call ops_stop */
1157 if (rtlmac->mac80211_registered == 1) {
1158 ieee80211_unregister_hw(hw);
1159 rtlmac->mac80211_registered = 0;
1160 } else {
1161 rtl_deinit_deferred_work(hw);
1162 rtlpriv->intf_ops->adapter_stop(hw);
1163 }
1164 /*deinit rfkill */
1165 /* rtl_deinit_rfkill(hw); */
1166 rtl_usb_deinit(hw);
1167 rtl_deinit_core(hw);
1168 kfree(rtlpriv->usb_data);
1169 rtlpriv->cfg->ops->deinit_sw_leds(hw);
1170 rtlpriv->cfg->ops->deinit_sw_vars(hw);
1171 _rtl_usb_io_handler_release(hw);
1172 usb_put_dev(rtlusb->udev);
1173 usb_set_intfdata(intf, NULL);
1174 ieee80211_free_hw(hw);
1175 }
1176 EXPORT_SYMBOL(rtl_usb_disconnect);
1177
1178 int rtl_usb_suspend(struct usb_interface *pusb_intf, pm_message_t message)
1179 {
1180 return 0;
1181 }
1182 EXPORT_SYMBOL(rtl_usb_suspend);
1183
1184 int rtl_usb_resume(struct usb_interface *pusb_intf)
1185 {
1186 return 0;
1187 }
1188 EXPORT_SYMBOL(rtl_usb_resume);
Linux with added FPC-III support