1 /******************************************************************************
2 *
3 * Copyright(c) 2007 - 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 *******************************************************************************/
19 #define _USB_OPS_C_
20
21 #include <rtl8723b_hal.h>
22
23 #ifdef CONFIG_SUPPORT_USB_INT
interrupt_handler_8723bu(_adapter * padapter,u16 pkt_len,u8 * pbuf)24 void interrupt_handler_8723bu(_adapter *padapter,u16 pkt_len,u8 *pbuf)
25 {
26 HAL_DATA_TYPE *pHalData=GET_HAL_DATA(padapter);
27 struct reportpwrstate_parm pwr_rpt;
28
29 if ( pkt_len != INTERRUPT_MSG_FORMAT_LEN )
30 {
31 DBG_8192C("%s Invalid interrupt content length (%d)!\n", __FUNCTION__, pkt_len);
32 return ;
33 }
34
35 // HISR
36 _rtw_memcpy(&(pHalData->IntArray[0]), &(pbuf[USB_INTR_CONTENT_HISR_OFFSET]), 4);
37 _rtw_memcpy(&(pHalData->IntArray[1]), &(pbuf[USB_INTR_CONTENT_HISRE_OFFSET]), 4);
38
39 #if 0 //DBG
40 {
41 u32 hisr=0 ,hisr_ex=0;
42 _rtw_memcpy(&hisr,&(pHalData->IntArray[0]),4);
43 hisr = le32_to_cpu(hisr);
44
45 _rtw_memcpy(&hisr_ex,&(pHalData->IntArray[1]),4);
46 hisr_ex = le32_to_cpu(hisr_ex);
47
48 if((hisr != 0) || (hisr_ex!=0))
49 DBG_871X("===> %s hisr:0x%08x ,hisr_ex:0x%08x \n",__FUNCTION__,hisr,hisr_ex);
50 }
51 #endif
52
53
54 #ifdef CONFIG_LPS_LCLK
55 if( pHalData->IntArray[0] & IMR_CPWM_88E )
56 {
57 _rtw_memcpy(&pwr_rpt.state, &(pbuf[USB_INTR_CONTENT_CPWM1_OFFSET]), 1);
58 //_rtw_memcpy(&pwr_rpt.state2, &(pbuf[USB_INTR_CONTENT_CPWM2_OFFSET]), 1);
59
60 //88e's cpwm value only change BIT0, so driver need to add PS_STATE_S2 for LPS flow.
61 pwr_rpt.state |= PS_STATE_S2;
62 _set_workitem(&(adapter_to_pwrctl(padapter)->cpwm_event));
63 }
64 #endif//CONFIG_LPS_LCLK
65
66 #ifdef CONFIG_INTERRUPT_BASED_TXBCN
67
68 #ifdef CONFIG_INTERRUPT_BASED_TXBCN_EARLY_INT
69 if (pHalData->IntArray[0] & IMR_BCNDMAINT0_88E)
70 #endif
71 #ifdef CONFIG_INTERRUPT_BASED_TXBCN_BCN_OK_ERR
72 if (pHalData->IntArray[0] & (IMR_TBDER_88E|IMR_TBDOK_88E))
73 #endif
74 {
75 struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
76 #if 0
77 if(pHalData->IntArray[0] & IMR_BCNDMAINT0_88E)
78 DBG_8192C("%s: HISR_BCNERLY_INT\n", __func__);
79 if(pHalData->IntArray[0] & IMR_TBDOK_88E)
80 DBG_8192C("%s: HISR_TXBCNOK\n", __func__);
81 if(pHalData->IntArray[0] & IMR_TBDER_88E)
82 DBG_8192C("%s: HISR_TXBCNERR\n", __func__);
83 #endif
84
85
86 if(check_fwstate(pmlmepriv, WIFI_AP_STATE))
87 {
88 //send_beacon(padapter);
89 if(pmlmepriv->update_bcn == _TRUE)
90 {
91 //tx_beacon_hdl(padapter, NULL);
92 set_tx_beacon_cmd(padapter);
93 }
94 }
95 #ifdef CONFIG_CONCURRENT_MODE
96 if(check_buddy_fwstate(padapter, WIFI_AP_STATE))
97 {
98 //send_beacon(padapter);
99 if(padapter->pbuddy_adapter->mlmepriv.update_bcn == _TRUE)
100 {
101 //tx_beacon_hdl(padapter, NULL);
102 set_tx_beacon_cmd(padapter->pbuddy_adapter);
103 }
104 }
105 #endif
106
107 }
108 #endif //CONFIG_INTERRUPT_BASED_TXBCN
109
110
111
112
113 #ifdef DBG_CONFIG_ERROR_DETECT_INT
114 if( pHalData->IntArray[1] & IMR_TXERR_8723B )
115 DBG_871X("===> %s Tx Error Flag Interrupt Status \n",__FUNCTION__);
116 if( pHalData->IntArray[1] & IMR_RXERR_8723B )
117 DBG_871X("===> %s Rx Error Flag INT Status \n",__FUNCTION__);
118 if( pHalData->IntArray[1] & IMR_TXFOVW_8723B )
119 DBG_871X("===> %s Transmit FIFO Overflow \n",__FUNCTION__);
120 if( pHalData->IntArray[1] & IMR_RXFOVW_8723B )
121 DBG_871X("===> %s Receive FIFO Overflow \n",__FUNCTION__);
122 #endif//DBG_CONFIG_ERROR_DETECT_INT
123
124
125 // C2H Event
126 if(pbuf[0]!= 0){
127 _rtw_memcpy(&(pHalData->C2hArray[0]), &(pbuf[USB_INTR_CONTENT_C2H_OFFSET]), 16);
128 //rtw_c2h_wk_cmd(padapter); to do..
129 }
130
131 }
132 #endif
133
pre_recv_entry(union recv_frame * precvframe,u8 * pphy_status)134 static s32 pre_recv_entry(union recv_frame *precvframe, u8 *pphy_status)
135 {
136 s32 ret=_SUCCESS;
137 #ifdef CONFIG_CONCURRENT_MODE
138 u8 *secondary_myid, *paddr1;
139 union recv_frame *precvframe_if2 = NULL;
140 _adapter *primary_padapter = precvframe->u.hdr.adapter;
141 _adapter *secondary_padapter = primary_padapter->pbuddy_adapter;
142 struct recv_priv *precvpriv = &primary_padapter->recvpriv;
143 _queue *pfree_recv_queue = &precvpriv->free_recv_queue;
144 HAL_DATA_TYPE *pHalData = GET_HAL_DATA(primary_padapter);
145
146 if(!secondary_padapter)
147 return ret;
148
149 paddr1 = GetAddr1Ptr(precvframe->u.hdr.rx_data);
150
151 if(IS_MCAST(paddr1) == _FALSE)//unicast packets
152 {
153 secondary_myid = adapter_mac_addr(secondary_padapter);
154
155 if(_rtw_memcmp(paddr1, secondary_myid, ETH_ALEN))
156 {
157 //change to secondary interface
158 precvframe->u.hdr.adapter = secondary_padapter;
159 }
160
161 //ret = recv_entry(precvframe);
162
163 }
164 else // Handle BC/MC Packets
165 {
166 //clone/copy to if2
167 _pkt *pkt_copy = NULL;
168 struct rx_pkt_attrib *pattrib = NULL;
169
170 precvframe_if2 = rtw_alloc_recvframe(pfree_recv_queue);
171
172 if(!precvframe_if2)
173 return _FAIL;
174
175 precvframe_if2->u.hdr.adapter = secondary_padapter;
176 _rtw_memcpy(&precvframe_if2->u.hdr.attrib, &precvframe->u.hdr.attrib, sizeof(struct rx_pkt_attrib));
177 pattrib = &precvframe_if2->u.hdr.attrib;
178
179 //driver need to set skb len for skb_copy().
180 //If skb->len is zero, skb_copy() will not copy data from original skb.
181 skb_put(precvframe->u.hdr.pkt, pattrib->pkt_len);
182
183 pkt_copy = rtw_skb_copy( precvframe->u.hdr.pkt);
184 if (pkt_copy == NULL)
185 {
186 if((pattrib->mfrag == 1)&&(pattrib->frag_num == 0))
187 {
188 DBG_8192C("pre_recv_entry(): rtw_skb_copy fail , drop frag frame \n");
189 rtw_free_recvframe(precvframe, &precvpriv->free_recv_queue);
190 return ret;
191 }
192
193 pkt_copy = rtw_skb_clone( precvframe->u.hdr.pkt);
194 if(pkt_copy == NULL)
195 {
196 DBG_8192C("pre_recv_entry(): rtw_skb_clone fail , drop frame\n");
197 rtw_free_recvframe(precvframe, &precvpriv->free_recv_queue);
198 return ret;
199 }
200 }
201
202 pkt_copy->dev = secondary_padapter->pnetdev;
203
204 precvframe_if2->u.hdr.pkt = pkt_copy;
205 precvframe_if2->u.hdr.rx_head = pkt_copy->head;
206 precvframe_if2->u.hdr.rx_data = pkt_copy->data;
207 precvframe_if2->u.hdr.rx_tail = skb_tail_pointer(pkt_copy);
208 precvframe_if2->u.hdr.rx_end = skb_end_pointer(pkt_copy);
209 precvframe_if2->u.hdr.len = pkt_copy->len;
210
211 //recvframe_put(precvframe_if2, pattrib->pkt_len);
212
213 if ( pHalData->ReceiveConfig & RCR_APPFCS)
214 recvframe_pull_tail(precvframe_if2, IEEE80211_FCS_LEN);
215
216 if (pattrib->physt)
217 rx_query_phy_status(precvframe_if2, pphy_status);
218
219 if(rtw_recv_entry(precvframe_if2) != _SUCCESS)
220 {
221 RT_TRACE(_module_rtl871x_recv_c_,_drv_err_,
222 ("recvbuf2recvframe: rtw_recv_entry(precvframe) != _SUCCESS\n"));
223 }
224 }
225
226 //if (precvframe->u.hdr.attrib.physt)
227 // rx_query_phy_status(precvframe, pphy_status);
228
229 //ret = rtw_recv_entry(precvframe);
230 #endif
231
232 return ret;
233
234 }
235
236 #if 0
237 static s32 pre_recv_entry(union recv_frame *precvframe, u8 *pphy_status)
238 {
239 s32 ret=_SUCCESS;
240 #ifdef CONFIG_CONCURRENT_MODE
241 u8 *secondary_myid, *paddr1;
242 union recv_frame *precvframe_if2 = NULL;
243 _adapter *primary_padapter = precvframe->u.hdr.adapter;
244 _adapter *secondary_padapter = primary_padapter->pbuddy_adapter;
245 struct recv_priv *precvpriv = &primary_padapter->recvpriv;
246 _queue *pfree_recv_queue = &precvpriv->free_recv_queue;
247 u8 *pbuf = precvframe->u.hdr.rx_data;
248
249 if(!secondary_padapter)
250 return ret;
251
252 paddr1 = GetAddr1Ptr(pbuf);
253
254 if(IS_MCAST(paddr1) == _FALSE)//unicast packets
255 {
256 secondary_myid = adapter_mac_addr(secondary_padapter);
257
258 if(_rtw_memcmp(paddr1, secondary_myid, ETH_ALEN))
259 {
260 //change to secondary interface
261 precvframe->u.hdr.adapter = secondary_padapter;
262 }
263
264 //ret = recv_entry(precvframe);
265
266 }
267 else // Handle BC/MC Packets
268 {
269
270 u8 clone = _TRUE;
271 #if 0
272 u8 type, subtype, *paddr2, *paddr3;
273
274 type = GetFrameType(pbuf);
275 subtype = GetFrameSubType(pbuf); //bit(7)~bit(2)
276
277 switch (type)
278 {
279 case WIFI_MGT_TYPE: //Handle BC/MC mgnt Packets
280 if(subtype == WIFI_BEACON)
281 {
282 paddr3 = GetAddr3Ptr(precvframe->u.hdr.rx_data);
283
284 if (check_fwstate(&secondary_padapter->mlmepriv, _FW_LINKED) &&
285 _rtw_memcmp(paddr3, get_bssid(&secondary_padapter->mlmepriv), ETH_ALEN))
286 {
287 //change to secondary interface
288 precvframe->u.hdr.adapter = secondary_padapter;
289 clone = _FALSE;
290 }
291
292 if(check_fwstate(&primary_padapter->mlmepriv, _FW_LINKED) &&
293 _rtw_memcmp(paddr3, get_bssid(&primary_padapter->mlmepriv), ETH_ALEN))
294 {
295 if(clone==_FALSE)
296 {
297 clone = _TRUE;
298 }
299 else
300 {
301 clone = _FALSE;
302 }
303
304 precvframe->u.hdr.adapter = primary_padapter;
305 }
306
307 if(check_fwstate(&primary_padapter->mlmepriv, _FW_UNDER_SURVEY|_FW_UNDER_LINKING) ||
308 check_fwstate(&secondary_padapter->mlmepriv, _FW_UNDER_SURVEY|_FW_UNDER_LINKING))
309 {
310 clone = _TRUE;
311 precvframe->u.hdr.adapter = primary_padapter;
312 }
313
314 }
315 else if(subtype == WIFI_PROBEREQ)
316 {
317 //probe req frame is only for interface2
318 //change to secondary interface
319 precvframe->u.hdr.adapter = secondary_padapter;
320 clone = _FALSE;
321 }
322 break;
323 case WIFI_CTRL_TYPE: // Handle BC/MC ctrl Packets
324
325 break;
326 case WIFI_DATA_TYPE: //Handle BC/MC data Packets
327 //Notes: AP MODE never rx BC/MC data packets
328
329 paddr2 = GetAddr2Ptr(precvframe->u.hdr.rx_data);
330
331 if(_rtw_memcmp(paddr2, get_bssid(&secondary_padapter->mlmepriv), ETH_ALEN))
332 {
333 //change to secondary interface
334 precvframe->u.hdr.adapter = secondary_padapter;
335 clone = _FALSE;
336 }
337
338 break;
339 default:
340
341 break;
342 }
343 #endif
344
345 if(_TRUE == clone)
346 {
347 //clone/copy to if2
348 struct rx_pkt_attrib *pattrib = NULL;
349
350 precvframe_if2 = rtw_alloc_recvframe(pfree_recv_queue);
351 if(precvframe_if2)
352 {
353 precvframe_if2->u.hdr.adapter = secondary_padapter;
354
355 _rtw_init_listhead(&precvframe_if2->u.hdr.list);
356 precvframe_if2->u.hdr.precvbuf = NULL; //can't access the precvbuf for new arch.
357 precvframe_if2->u.hdr.len=0;
358
359 _rtw_memcpy(&precvframe_if2->u.hdr.attrib, &precvframe->u.hdr.attrib, sizeof(struct rx_pkt_attrib));
360
361 pattrib = &precvframe_if2->u.hdr.attrib;
362
363 if(rtw_os_alloc_recvframe(secondary_padapter, precvframe_if2, pbuf, NULL) == _SUCCESS)
364 {
365 recvframe_put(precvframe_if2, pattrib->pkt_len);
366 //recvframe_pull(precvframe_if2, drvinfo_sz + RXDESC_SIZE);
367
368 if (pattrib->physt && pphy_status)
369 rx_query_phy_status(precvframe_if2, pphy_status);
370
371 ret = rtw_recv_entry(precvframe_if2);
372 }
373 else
374 {
375 rtw_free_recvframe(precvframe_if2, pfree_recv_queue);
376 DBG_8192C("%s()-%d: alloc_skb() failed!\n", __FUNCTION__, __LINE__);
377 }
378
379 }
380
381 }
382
383 }
384 //if (precvframe->u.hdr.attrib.physt)
385 // rx_query_phy_status(precvframe, pphy_status);
386
387 //ret = rtw_recv_entry(precvframe);
388
389 #endif
390
391 return ret;
392
393 }
394 #endif
395
recvbuf2recvframe(PADAPTER padapter,void * ptr)396 int recvbuf2recvframe(PADAPTER padapter, void *ptr)
397 {
398 u8 *pbuf;
399 u8 pkt_cnt = 0;
400 u32 pkt_offset;
401 s32 transfer_len;
402 u8 *pdata, *pphy_status;
403 union recv_frame *precvframe = NULL;
404 struct rx_pkt_attrib *pattrib = NULL;
405 PHAL_DATA_TYPE pHalData;
406 struct recv_priv *precvpriv;
407 _queue *pfree_recv_queue;
408 _pkt *pskb;
409
410
411 pHalData = GET_HAL_DATA(padapter);
412 precvpriv = &padapter->recvpriv;
413 pfree_recv_queue = &precvpriv->free_recv_queue;
414
415 #ifdef CONFIG_USE_USB_BUFFER_ALLOC_RX
416 pskb = NULL;
417 transfer_len = (s32)((struct recv_buf*)ptr)->transfer_len;
418 pbuf = ((struct recv_buf*)ptr)->pbuf;
419 #else // !CONFIG_USE_USB_BUFFER_ALLOC_RX
420 pskb = (_pkt*)ptr;
421 transfer_len = (s32)pskb->len;
422 pbuf = pskb->data;
423 #endif // !CONFIG_USE_USB_BUFFER_ALLOC_RX
424
425 #ifdef CONFIG_USB_RX_AGGREGATION
426 pkt_cnt = GET_RX_STATUS_DESC_USB_AGG_PKTNUM_8723B(pbuf);
427 #endif
428
429 do {
430 precvframe = rtw_alloc_recvframe(pfree_recv_queue);
431 if (precvframe == NULL) {
432 DBG_8192C("%s: rtw_alloc_recvframe() failed! RX Drop!\n", __FUNCTION__);
433 goto _exit_recvbuf2recvframe;
434 }
435
436 if (transfer_len >1500)
437 _rtw_init_listhead(&precvframe->u.hdr.list);
438 precvframe->u.hdr.precvbuf = NULL; //can't access the precvbuf for new arch.
439 precvframe->u.hdr.len = 0;
440
441 rtl8723b_query_rx_desc_status(precvframe, pbuf);
442
443 pattrib = &precvframe->u.hdr.attrib;
444
445 if ((padapter->registrypriv.mp_mode == 0)
446 && ((pattrib->crc_err) || (pattrib->icv_err))) {
447 DBG_8192C("%s: RX Warning! crc_err=%d icv_err=%d, skip!\n",
448 __FUNCTION__, pattrib->crc_err, pattrib->icv_err);
449
450 rtw_free_recvframe(precvframe, pfree_recv_queue);
451 goto _exit_recvbuf2recvframe;
452 }
453
454 pkt_offset = RXDESC_SIZE + pattrib->drvinfo_sz + pattrib->shift_sz + pattrib->pkt_len;
455 if ((pattrib->pkt_len <= 0) || (pkt_offset > transfer_len)) {
456 DBG_8192C("%s: RX Error! pkt_len=%d pkt_offset=%d transfer_len=%d\n",
457 __FUNCTION__, pattrib->pkt_len, pkt_offset, transfer_len);
458
459 rtw_free_recvframe(precvframe, pfree_recv_queue);
460 goto _exit_recvbuf2recvframe;
461 }
462
463 pdata = pbuf + RXDESC_SIZE + pattrib->drvinfo_sz + pattrib->shift_sz;
464 if (rtw_os_alloc_recvframe(padapter, precvframe, pdata, pskb) == _FAIL) {
465 DBG_8192C("%s: RX Error! rtw_os_alloc_recvframe FAIL!\n", __FUNCTION__);
466
467 rtw_free_recvframe(precvframe, pfree_recv_queue);
468 goto _exit_recvbuf2recvframe;
469 }
470
471 recvframe_put(precvframe, pattrib->pkt_len);
472
473 if (pattrib->pkt_rpt_type == NORMAL_RX) {
474 if (pattrib->physt)
475 pphy_status = pbuf + RXDESC_OFFSET;
476 else
477 pphy_status = NULL;
478
479 #ifdef CONFIG_CONCURRENT_MODE
480 if (rtw_buddy_adapter_up(padapter)) {
481 if (pre_recv_entry(precvframe, pphy_status) != _SUCCESS) {
482 // Return fail except data frame
483 //DBG_8192C("%s: RX Error! (concurrent)pre_recv_entry FAIL!\n", __FUNCTION__);
484 }
485 }
486 #endif // CONFIG_CONCURRENT_MODE
487
488 if (pphy_status)
489 rx_query_phy_status(precvframe, pphy_status);
490
491 if (rtw_recv_entry(precvframe) != _SUCCESS) {
492 // Return fail except data frame
493 //DBG_8192C("%s: RX Error! rtw_recv_entry FAIL!\n", __FUNCTION__);
494 }
495 }
496 else {
497 #ifdef CONFIG_C2H_PACKET_EN
498 if (pattrib->pkt_rpt_type == C2H_PACKET) {
499 rtl8723b_c2h_packet_handler(padapter, precvframe->u.hdr.rx_data, pattrib->pkt_len);
500 }
501 else {
502 DBG_8192C("%s: [WARNNING] RX type(%d) not be handled!\n",
503 __FUNCTION__, pattrib->pkt_rpt_type);
504 }
505 #endif // CONFIG_C2H_PACKET_EN
506 rtw_free_recvframe(precvframe, pfree_recv_queue);
507 }
508
509 #ifdef CONFIG_USB_RX_AGGREGATION
510 // jaguar 8-byte alignment
511 pkt_offset = (u16)_RND8(pkt_offset);
512 pkt_cnt--;
513 pbuf += pkt_offset;
514 #endif
515 transfer_len -= pkt_offset;
516 precvframe = NULL;
517 } while (transfer_len > 0);
518
519 _exit_recvbuf2recvframe:
520
521 return _SUCCESS;
522 }
523
524
rtl8723bu_xmit_tasklet(void * priv)525 void rtl8723bu_xmit_tasklet(void *priv)
526 {
527 int ret = _FALSE;
528 _adapter *padapter = (_adapter*)priv;
529 struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
530
531 while(1)
532 {
533 if (RTW_CANNOT_TX(padapter))
534 {
535 DBG_8192C("xmit_tasklet => bDriverStopped or bSurpriseRemoved or bWritePortCancel\n");
536 break;
537 }
538
539 if (rtw_xmit_ac_blocked(padapter) == _TRUE)
540 break;
541
542 ret = rtl8723bu_xmitframe_complete(padapter, pxmitpriv, NULL);
543
544 if(ret==_FALSE)
545 break;
546
547 }
548
549 }
550
551
552
rtl8723bu_set_intf_ops(struct _io_ops * pops)553 void rtl8723bu_set_intf_ops(struct _io_ops *pops)
554 {
555 _func_enter_;
556
557 _rtw_memset((u8 *)pops, 0, sizeof(struct _io_ops));
558
559 pops->_read8 = &usb_read8;
560 pops->_read16 = &usb_read16;
561 pops->_read32 = &usb_read32;
562 pops->_read_mem = &usb_read_mem;
563 pops->_read_port = &usb_read_port;
564
565 pops->_write8 = &usb_write8;
566 pops->_write16 = &usb_write16;
567 pops->_write32 = &usb_write32;
568 pops->_writeN = &usb_writeN;
569
570 #ifdef CONFIG_USB_SUPPORT_ASYNC_VDN_REQ
571 pops->_write8_async= &usb_async_write8;
572 pops->_write16_async = &usb_async_write16;
573 pops->_write32_async = &usb_async_write32;
574 #endif
575 pops->_write_mem = &usb_write_mem;
576 pops->_write_port = &usb_write_port;
577
578 pops->_read_port_cancel = &usb_read_port_cancel;
579 pops->_write_port_cancel = &usb_write_port_cancel;
580
581 #ifdef CONFIG_USB_INTERRUPT_IN_PIPE
582 pops->_read_interrupt = &usb_read_interrupt;
583 #endif
584
585 _func_exit_;
586
587 }
rtl8723bu_set_hw_type(struct dvobj_priv * pdvobj)588 void rtl8723bu_set_hw_type(struct dvobj_priv *pdvobj)
589 {
590 pdvobj->HardwareType = HARDWARE_TYPE_RTL8723BU;
591 DBG_871X("CHIP TYPE: RTL8723BU\n");
592 }
593