Free Electrons

Embedded Linux Experts

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
/******************************************************************************
 *
 * 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.
 *
 ******************************************************************************/
#define _HCI_OPS_OS_C_

#include <osdep_service.h>
#include <drv_types.h>
#include <osdep_intf.h>
#include <usb_ops.h>
#include <recv_osdep.h>
#include <rtl8723a_hal.h>
#include <rtl8723a_recv.h>

u8 rtl8723au_read8(struct rtw_adapter *padapter, u16 addr)
{
	struct dvobj_priv *pdvobjpriv = adapter_to_dvobj(padapter);
	struct usb_device *udev = pdvobjpriv->pusbdev;
	int len;
	u8 data;

	mutex_lock(&pdvobjpriv->usb_vendor_req_mutex);
	len = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
			      REALTEK_USB_VENQT_CMD_REQ, REALTEK_USB_VENQT_READ,
			      addr, 0, &pdvobjpriv->usb_buf.val8, sizeof(data),
			      RTW_USB_CONTROL_MSG_TIMEOUT);

	data = pdvobjpriv->usb_buf.val8;
	mutex_unlock(&pdvobjpriv->usb_vendor_req_mutex);

	return data;
}

u16 rtl8723au_read16(struct rtw_adapter *padapter, u16 addr)
{
	struct dvobj_priv *pdvobjpriv = adapter_to_dvobj(padapter);
	struct usb_device *udev = pdvobjpriv->pusbdev;
	int len;
	u16 data;

	mutex_lock(&pdvobjpriv->usb_vendor_req_mutex);
	len = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
			      REALTEK_USB_VENQT_CMD_REQ, REALTEK_USB_VENQT_READ,
			      addr, 0, &pdvobjpriv->usb_buf.val16, sizeof(data),
			      RTW_USB_CONTROL_MSG_TIMEOUT);

	data = le16_to_cpu(pdvobjpriv->usb_buf.val16);
	mutex_unlock(&pdvobjpriv->usb_vendor_req_mutex);

	return data;
}

u32 rtl8723au_read32(struct rtw_adapter *padapter, u16 addr)
{
	struct dvobj_priv *pdvobjpriv = adapter_to_dvobj(padapter);
	struct usb_device *udev = pdvobjpriv->pusbdev;
	int len;
	u32 data;

	mutex_lock(&pdvobjpriv->usb_vendor_req_mutex);
	len = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
			      REALTEK_USB_VENQT_CMD_REQ, REALTEK_USB_VENQT_READ,
			      addr, 0, &pdvobjpriv->usb_buf.val32, sizeof(data),
			      RTW_USB_CONTROL_MSG_TIMEOUT);

	data = le32_to_cpu(pdvobjpriv->usb_buf.val32);
	mutex_unlock(&pdvobjpriv->usb_vendor_req_mutex);

	return data;
}

int rtl8723au_write8(struct rtw_adapter *padapter, u16 addr, u8 val)
{
	struct dvobj_priv *pdvobjpriv = adapter_to_dvobj(padapter);
	struct usb_device *udev = pdvobjpriv->pusbdev;
	int ret;

	mutex_lock(&pdvobjpriv->usb_vendor_req_mutex);
	pdvobjpriv->usb_buf.val8 = val;

	ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
			      REALTEK_USB_VENQT_CMD_REQ,
			      REALTEK_USB_VENQT_WRITE,
			      addr, 0, &pdvobjpriv->usb_buf.val8, sizeof(val),
			      RTW_USB_CONTROL_MSG_TIMEOUT);

	if (ret != sizeof(val))
		ret = _FAIL;
	else
		ret = _SUCCESS;

	mutex_unlock(&pdvobjpriv->usb_vendor_req_mutex);
	return ret;
}

int rtl8723au_write16(struct rtw_adapter *padapter, u16 addr, u16 val)
{
	struct dvobj_priv *pdvobjpriv = adapter_to_dvobj(padapter);
	struct usb_device *udev = pdvobjpriv->pusbdev;
	int ret;

	mutex_lock(&pdvobjpriv->usb_vendor_req_mutex);
	pdvobjpriv->usb_buf.val16 = cpu_to_le16(val);

	ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
			      REALTEK_USB_VENQT_CMD_REQ,
			      REALTEK_USB_VENQT_WRITE,
			      addr, 0, &pdvobjpriv->usb_buf.val16, sizeof(val),
			      RTW_USB_CONTROL_MSG_TIMEOUT);

	if (ret != sizeof(val))
		ret = _FAIL;
	else
		ret = _SUCCESS;

	mutex_unlock(&pdvobjpriv->usb_vendor_req_mutex);
	return ret;
}

int rtl8723au_write32(struct rtw_adapter *padapter, u16 addr, u32 val)
{
	struct dvobj_priv *pdvobjpriv = adapter_to_dvobj(padapter);
	struct usb_device *udev = pdvobjpriv->pusbdev;
	int ret;

	mutex_lock(&pdvobjpriv->usb_vendor_req_mutex);
	pdvobjpriv->usb_buf.val32 = cpu_to_le32(val);

	ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
			      REALTEK_USB_VENQT_CMD_REQ,
			      REALTEK_USB_VENQT_WRITE,
			      addr, 0, &pdvobjpriv->usb_buf.val32, sizeof(val),
			      RTW_USB_CONTROL_MSG_TIMEOUT);

	if (ret != sizeof(val))
		ret = _FAIL;
	else
		ret = _SUCCESS;

	mutex_unlock(&pdvobjpriv->usb_vendor_req_mutex);
	return ret;
}

int rtl8723au_writeN(struct rtw_adapter *padapter, u16 addr, u16 len, u8 *buf)
{
	struct dvobj_priv *pdvobjpriv = adapter_to_dvobj(padapter);
	struct usb_device *udev = pdvobjpriv->pusbdev;
	int ret;

	ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
			      REALTEK_USB_VENQT_CMD_REQ,
			      REALTEK_USB_VENQT_WRITE,
			      addr, 0, buf, len, RTW_USB_CONTROL_MSG_TIMEOUT);

	if (ret != len)
		return _FAIL;
	return _SUCCESS;
}

/*
 * Description:
 *	Recognize the interrupt content by reading the interrupt
 *	register or content and masking interrupt mask (IMR)
 *	if it is our NIC's interrupt. After recognizing, we may clear
 *	the all interrupts (ISR).
 * Arguments:
 *	[in] Adapter -
 *		The adapter context.
 *	[in] pContent -
 *		Under PCI interface, this field is ignord.
 *		Under USB interface, the content is the interrupt
 *		content pointer.
 *		Under SDIO interface, this is the interrupt type which
 *		is Local interrupt or system interrupt.
 *	[in] ContentLen -
 *		The length in byte of pContent.
 * Return:
 *	If any interrupt matches the mask (IMR), return true, and
 *	return false otherwise.
 */
static bool
InterruptRecognized8723AU(struct rtw_adapter *Adapter, void *pContent,
			  u32 ContentLen)
{
	struct hal_data_8723a	*pHalData = GET_HAL_DATA(Adapter);
	u8 *buffer = (u8 *)pContent;
	struct reportpwrstate_parm report;

	memcpy(&pHalData->IntArray[0], &buffer[USB_INTR_CONTENT_HISR_OFFSET],
	       4);
	pHalData->IntArray[0] &= pHalData->IntrMask[0];

	/* For HISR extension. Added by tynli. 2009.10.07. */
	memcpy(&pHalData->IntArray[1],
	       &buffer[USB_INTR_CONTENT_HISRE_OFFSET], 4);
	pHalData->IntArray[1] &= pHalData->IntrMask[1];

	/* We sholud remove this function later because DDK suggest
	 * not to executing too many operations in MPISR  */

	memcpy(&report.state, &buffer[USB_INTR_CPWM_OFFSET], 1);

	return (pHalData->IntArray[0] & pHalData->IntrMask[0]) != 0 ||
		(pHalData->IntArray[1] & pHalData->IntrMask[1]) != 0;
}

static void usb_read_interrupt_complete(struct urb *purb)
{
	int err;
	struct rtw_adapter *padapter = (struct rtw_adapter *)purb->context;

	if (padapter->bSurpriseRemoved || padapter->bDriverStopped ||
	    padapter->bReadPortCancel) {
		DBG_8723A("%s() RX Warning! bDriverStopped(%d) OR "
			  "bSurpriseRemoved(%d) bReadPortCancel(%d)\n",
			  __func__, padapter->bDriverStopped,
			  padapter->bSurpriseRemoved,
			  padapter->bReadPortCancel);
		return;
	}

	if (purb->status == 0) {
		struct c2h_evt_hdr *c2h_evt;

		c2h_evt = (struct c2h_evt_hdr *)purb->transfer_buffer;

		if (purb->actual_length > USB_INTR_CONTENT_LENGTH) {
			DBG_8723A("usb_read_interrupt_complete: purb->actual_"
				  "length > USB_INTR_CONTENT_LENGTH\n");
			goto urb_submit;
		}

		InterruptRecognized8723AU(padapter, purb->transfer_buffer,
					  purb->actual_length);

		if (c2h_evt_exist(c2h_evt)) {
			if (c2h_id_filter_ccx_8723a(c2h_evt->id)) {
				/* Handle CCX report here */
				handle_txrpt_ccx_8723a(padapter, (void *)
						       c2h_evt->payload);
				schedule_work(&padapter->evtpriv.irq_wk);
			} else {
				struct evt_work *c2w;
				int res;

				c2w = kmalloc(sizeof(struct evt_work),
						GFP_ATOMIC);

				if (!c2w) {
					printk(KERN_WARNING "%s: unable to "
					       "allocate work buffer\n",
					       __func__);
					goto urb_submit;
				}

				c2w->adapter = padapter;
				INIT_WORK(&c2w->work, rtw_evt_work);
				memcpy(c2w->u.buf, purb->transfer_buffer, 16);

				res = queue_work(padapter->evtpriv.wq,
						 &c2w->work);

				if (!res) {
					printk(KERN_ERR "%s: Call to "
					       "queue_work() failed\n",
					       __func__);
					kfree(c2w);
					goto urb_submit;
				}
			}
		}

urb_submit:
		err = usb_submit_urb(purb, GFP_ATOMIC);
		if (err && (err != -EPERM)) {
			DBG_8723A("cannot submit interrupt in-token(err = "
				  "0x%08x), urb_status = %d\n",
				  err, purb->status);
		}
	} else {
		DBG_8723A("###=> usb_read_interrupt_complete => urb "
			  "status(%d)\n", purb->status);

		switch (purb->status) {
		case -EINVAL:
		case -EPIPE:
		case -ENODEV:
		case -ESHUTDOWN:
			RT_TRACE(_module_hci_ops_os_c_, _drv_err_,
				 ("usb_read_port_complete:bSurpriseRemoved ="
				  "true\n"));
			/* Fall Through here */
		case -ENOENT:
			padapter->bDriverStopped = true;
			RT_TRACE(_module_hci_ops_os_c_, _drv_err_,
				 ("usb_read_port_complete:bDriverStopped ="
				  "true\n"));
			break;
		case -EPROTO:
			break;
		case -EINPROGRESS:
			DBG_8723A("ERROR: URB IS IN PROGRESS!\n");
			break;
		default:
			break;
		}
	}
}

int rtl8723au_read_interrupt(struct rtw_adapter *adapter, u32 addr)
{
	int err;
	unsigned int pipe;
	int ret = _SUCCESS;
	struct dvobj_priv *pdvobj = adapter_to_dvobj(adapter);
	struct recv_priv *precvpriv = &adapter->recvpriv;
	struct usb_device *pusbd = pdvobj->pusbdev;

	/* translate DMA FIFO addr to pipehandle */
	pipe = usb_rcvintpipe(pusbd, pdvobj->RtInPipe[1]);

	usb_fill_int_urb(precvpriv->int_in_urb, pusbd, pipe,
			 precvpriv->int_in_buf, USB_INTR_CONTENT_LENGTH,
			 usb_read_interrupt_complete, adapter, 1);

	err = usb_submit_urb(precvpriv->int_in_urb, GFP_ATOMIC);
	if (err && (err != -EPERM)) {
		DBG_8723A("cannot submit interrupt in-token(err = 0x%08x),"
			  "urb_status = %d\n", err,
			  precvpriv->int_in_urb->status);
		ret = _FAIL;
	}

	return ret;
}

static int recvbuf2recvframe(struct rtw_adapter *padapter, struct sk_buff *pskb)
{
	u8	*pbuf;
	u8	shift_sz = 0;
	u16	pkt_cnt;
	u32	pkt_offset, skb_len, alloc_sz;
	int	transfer_len;
	struct recv_stat *prxstat;
	struct phy_stat	*pphy_info;
	struct sk_buff *pkt_copy;
	struct recv_frame *precvframe;
	struct rx_pkt_attrib *pattrib;
	struct recv_priv *precvpriv = &padapter->recvpriv;
	struct rtw_queue *pfree_recv_queue = &precvpriv->free_recv_queue;

	transfer_len = (int)pskb->len;
	pbuf = pskb->data;

	prxstat = (struct recv_stat *)pbuf;
	pkt_cnt = (le32_to_cpu(prxstat->rxdw2) >> 16) & 0xff;

	do {
		RT_TRACE(_module_rtl871x_recv_c_, _drv_info_,
			 ("recvbuf2recvframe: rxdesc = offsset 0:0x%08x, "
			  "4:0x%08x, 8:0x%08x, C:0x%08x\n", prxstat->rxdw0,
			  prxstat->rxdw1, prxstat->rxdw2, prxstat->rxdw4));

		prxstat = (struct recv_stat *)pbuf;

		precvframe = rtw_alloc_recvframe23a(pfree_recv_queue);
		if (!precvframe) {
			RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
				 ("recvbuf2recvframe: precvframe == NULL\n"));
			DBG_8723A("%s()-%d: rtw_alloc_recvframe23a() failed! RX "
				  "Drop!\n", __func__, __LINE__);
			goto _exit_recvbuf2recvframe;
		}

		INIT_LIST_HEAD(&precvframe->list);

		update_recvframe_attrib(precvframe, prxstat);

		pattrib = &precvframe->attrib;

		if (pattrib->crc_err) {
			DBG_8723A("%s()-%d: RX Warning! rx CRC ERROR !!\n",
				  __func__, __LINE__);
			rtw_free_recvframe23a(precvframe);
			goto _exit_recvbuf2recvframe;
		}

		pkt_offset = RXDESC_SIZE + pattrib->drvinfo_sz +
			pattrib->shift_sz + pattrib->pkt_len;

		if (pattrib->pkt_len <= 0 || pkt_offset > transfer_len) {
			RT_TRACE(_module_rtl871x_recv_c_, _drv_info_,
				 ("recvbuf2recvframe: pkt_len<= 0\n"));
			DBG_8723A("%s()-%d: RX Warning!\n",
				  __func__, __LINE__);
			rtw_free_recvframe23a(precvframe);
			goto _exit_recvbuf2recvframe;
		}

		/*	Modified by Albert 20101213 */
		/*	For 8 bytes IP header alignment. */
		/*	Qos data, wireless lan header length is 26 */
		if (pattrib->qos)
			shift_sz = 6;
		else
			shift_sz = 0;

		skb_len = pattrib->pkt_len;

		/* for first fragment packet, driver need allocate
		 * 1536+drvinfo_sz+RXDESC_SIZE to defrag packet.
		 * modify alloc_sz for recvive crc error packet
		 * by thomas 2011-06-02 */
		if (pattrib->mfrag == 1 && pattrib->frag_num == 0) {
			/* alloc_sz = 1664;	1664 is 128 alignment. */
			if (skb_len <= 1650)
				alloc_sz = 1664;
			else
				alloc_sz = skb_len + 14;
		} else {
			alloc_sz = skb_len;
		/*  6 is for IP header 8 bytes alignment in QoS packet case. */
		/*  8 is for skb->data 4 bytes alignment. */
			alloc_sz += 14;
		}

		pkt_copy = netdev_alloc_skb(padapter->pnetdev, alloc_sz);
		if (pkt_copy) {
			pkt_copy->dev = padapter->pnetdev;
			precvframe->pkt = pkt_copy;
			/* force pkt_copy->data at 8-byte alignment address */
			skb_reserve(pkt_copy, 8 -
				    ((unsigned long)(pkt_copy->data) & 7));
			/*force ip_hdr at 8-byte alignment address
			  according to shift_sz. */
			skb_reserve(pkt_copy, shift_sz);
			memcpy(pkt_copy->data, pbuf + pattrib->shift_sz +
			       pattrib->drvinfo_sz + RXDESC_SIZE, skb_len);
			skb_put(pkt_copy, skb_len);
		} else {
			if (pattrib->mfrag == 1 && pattrib->frag_num == 0) {
				DBG_8723A("recvbuf2recvframe: alloc_skb fail, "
					  "drop frag frame \n");
				rtw_free_recvframe23a(precvframe);
				goto _exit_recvbuf2recvframe;
			}

			precvframe->pkt = skb_clone(pskb, GFP_ATOMIC);
			if (!precvframe->pkt) {
				DBG_8723A("recvbuf2recvframe: skb_clone "
					  "fail\n");
				rtw_free_recvframe23a(precvframe);
				goto _exit_recvbuf2recvframe;
			}
		}

		if (pattrib->physt) {
			pphy_info = (struct phy_stat *)(pbuf + RXDESC_OFFSET);
			update_recvframe_phyinfo(precvframe, pphy_info);
		}

		if (rtw_recv_entry23a(precvframe) != _SUCCESS)
			RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
				 ("recvbuf2recvframe: rtw_recv_entry23a"
				  "(precvframe) != _SUCCESS\n"));

		pkt_cnt--;
		transfer_len -= pkt_offset;
		pbuf += pkt_offset;
		precvframe = NULL;
		pkt_copy = NULL;

		if (transfer_len > 0 && pkt_cnt == 0)
			pkt_cnt = (le32_to_cpu(prxstat->rxdw2)>>16) & 0xff;

	} while (transfer_len > 0 && pkt_cnt > 0);

_exit_recvbuf2recvframe:

	return _SUCCESS;
}

void rtl8723au_recv_tasklet(void *priv)
{
	struct sk_buff *pskb;
	struct rtw_adapter *padapter = (struct rtw_adapter *)priv;
	struct recv_priv *precvpriv = &padapter->recvpriv;

	while (NULL != (pskb = skb_dequeue(&precvpriv->rx_skb_queue))) {
		if (padapter->bDriverStopped || padapter->bSurpriseRemoved) {
			DBG_8723A("recv_tasklet => bDriverStopped or "
				  "bSurpriseRemoved \n");
			dev_kfree_skb_any(pskb);
			break;
		}

		recvbuf2recvframe(padapter, pskb);
		skb_reset_tail_pointer(pskb);

		pskb->len = 0;

		skb_queue_tail(&precvpriv->free_recv_skb_queue, pskb);
	}
}

static void usb_read_port_complete(struct urb *purb)
{
	struct recv_buf *precvbuf = (struct recv_buf *)purb->context;
	struct rtw_adapter *padapter = (struct rtw_adapter *)precvbuf->adapter;
	struct recv_priv *precvpriv = &padapter->recvpriv;

	RT_TRACE(_module_hci_ops_os_c_, _drv_err_,
		 ("usb_read_port_complete!!!\n"));

	precvpriv->rx_pending_cnt--;

	if (padapter->bSurpriseRemoved || padapter->bDriverStopped ||
	    padapter->bReadPortCancel) {
		RT_TRACE(_module_hci_ops_os_c_, _drv_err_,
			 ("usb_read_port_complete:bDriverStopped(%d) OR "
			  "bSurpriseRemoved(%d)\n", padapter->bDriverStopped,
			  padapter->bSurpriseRemoved));

		DBG_8723A("%s()-%d: RX Warning! bDriverStopped(%d) OR "
			  "bSurpriseRemoved(%d) bReadPortCancel(%d)\n",
			  __func__, __LINE__, padapter->bDriverStopped,
			  padapter->bSurpriseRemoved, padapter->bReadPortCancel);
		return;
	}

	if (purb->status == 0) {
		if (purb->actual_length > MAX_RECVBUF_SZ ||
		    purb->actual_length < RXDESC_SIZE) {
			RT_TRACE(_module_hci_ops_os_c_, _drv_err_,
				 ("usb_read_port_complete: (purb->actual_"
				  "length > MAX_RECVBUF_SZ) || (purb->actual_"
				  "length < RXDESC_SIZE)\n"));
			rtl8723au_read_port(padapter, RECV_BULK_IN_ADDR, 0,
					    precvbuf);
			DBG_8723A("%s()-%d: RX Warning!\n",
				  __func__, __LINE__);
		} else {
			rtw_reset_continual_urb_error(
				adapter_to_dvobj(padapter));

			skb_put(precvbuf->pskb, purb->actual_length);
			skb_queue_tail(&precvpriv->rx_skb_queue,
				       precvbuf->pskb);

			if (skb_queue_len(&precvpriv->rx_skb_queue) <= 1)
				tasklet_schedule(&precvpriv->recv_tasklet);

			precvbuf->pskb = NULL;
			rtl8723au_read_port(padapter, RECV_BULK_IN_ADDR, 0,
					    precvbuf);
		}
	} else {
		RT_TRACE(_module_hci_ops_os_c_, _drv_err_,
			 ("usb_read_port_complete : purb->status(%d) != 0 \n",
			  purb->status));
		skb_put(precvbuf->pskb, purb->actual_length);
		precvbuf->pskb = NULL;

		DBG_8723A("###=> usb_read_port_complete => urb status(%d)\n",
			  purb->status);

		if (rtw_inc_and_chk_continual_urb_error(
			    adapter_to_dvobj(padapter))) {
			padapter->bSurpriseRemoved = true;
		}

		switch (purb->status) {
		case -EINVAL:
		case -EPIPE:
		case -ENODEV:
		case -ESHUTDOWN:
			RT_TRACE(_module_hci_ops_os_c_, _drv_err_,
				 ("usb_read_port_complete:bSurprise"
				  "Removed = true\n"));
			/* Intentional fall through here */
		case -ENOENT:
			padapter->bDriverStopped = true;
			RT_TRACE(_module_hci_ops_os_c_, _drv_err_,
				 ("usb_read_port_complete:"
				  "bDriverStopped = true\n"));
			break;
		case -EPROTO:
		case -EOVERFLOW:
			rtl8723au_read_port(padapter, RECV_BULK_IN_ADDR, 0,
					    precvbuf);
			break;
		case -EINPROGRESS:
			DBG_8723A("ERROR: URB IS IN PROGRESS!\n");
			break;
		default:
			break;
		}
	}
}

int rtl8723au_read_port(struct rtw_adapter *adapter, u32 addr, u32 cnt,
			struct recv_buf *precvbuf)
{
	int err;
	unsigned int pipe;
	unsigned long tmpaddr;
	unsigned long alignment;
	int ret = _SUCCESS;
	struct urb *purb;
	struct dvobj_priv *pdvobj = adapter_to_dvobj(adapter);
	struct recv_priv *precvpriv = &adapter->recvpriv;
	struct usb_device *pusbd = pdvobj->pusbdev;

	if (adapter->bDriverStopped || adapter->bSurpriseRemoved) {
		RT_TRACE(_module_hci_ops_os_c_, _drv_err_,
			 ("usb_read_port:(padapter->bDriverStopped ||"
			  "padapter->bSurpriseRemoved)!!!\n"));
		return _FAIL;
	}

	if (!precvbuf) {
		RT_TRACE(_module_hci_ops_os_c_, _drv_err_,
			 ("usb_read_port:precvbuf == NULL\n"));
		return _FAIL;
	}

	if (!precvbuf->pskb)
		precvbuf->pskb = skb_dequeue(&precvpriv->free_recv_skb_queue);

	/* re-assign for linux based on skb */
	if (!precvbuf->pskb) {
		precvbuf->pskb = netdev_alloc_skb(adapter->pnetdev, MAX_RECVBUF_SZ + RECVBUFF_ALIGN_SZ);
		if (precvbuf->pskb == NULL) {
			RT_TRACE(_module_hci_ops_os_c_, _drv_err_, ("init_recvbuf(): alloc_skb fail!\n"));
			return _FAIL;
		}

		tmpaddr = (unsigned long)precvbuf->pskb->data;
		alignment = tmpaddr & (RECVBUFF_ALIGN_SZ-1);
		skb_reserve(precvbuf->pskb, (RECVBUFF_ALIGN_SZ - alignment));
	}

	precvpriv->rx_pending_cnt++;

	purb = precvbuf->purb;

	/* translate DMA FIFO addr to pipehandle */
	pipe = usb_rcvbulkpipe(pusbd, pdvobj->RtInPipe[0]);

	usb_fill_bulk_urb(purb, pusbd, pipe, precvbuf->pskb->data,
			  MAX_RECVBUF_SZ, usb_read_port_complete,
			  precvbuf);/* context is precvbuf */

	err = usb_submit_urb(purb, GFP_ATOMIC);
	if ((err) && (err != -EPERM)) {
		RT_TRACE(_module_hci_ops_os_c_, _drv_err_,
			 ("cannot submit rx in-token(err = 0x%.8x), URB_STATUS "
			  "= 0x%.8x", err, purb->status));
		DBG_8723A("cannot submit rx in-token(err = 0x%08x), urb_status "
			  "= %d\n", err, purb->status);
		ret = _FAIL;
	}
	return ret;
}

void rtl8723au_xmit_tasklet(void *priv)
{
	int ret;
	struct rtw_adapter *padapter = (struct rtw_adapter *)priv;
	struct xmit_priv *pxmitpriv = &padapter->xmitpriv;

	if (check_fwstate(&padapter->mlmepriv, _FW_UNDER_SURVEY))
		return;

	while (1) {
		if (padapter->bDriverStopped || padapter->bSurpriseRemoved ||
		    padapter->bWritePortCancel) {
			DBG_8723A("xmit_tasklet => bDriverStopped or "
				  "bSurpriseRemoved or bWritePortCancel\n");
			break;
		}

		ret = rtl8723au_xmitframe_complete(padapter, pxmitpriv, NULL);

		if (!ret)
			break;
	}
}

void rtl8723au_set_hw_type(struct rtw_adapter *padapter)
{
	padapter->chip_type = RTL8723A;
	padapter->HardwareType = HARDWARE_TYPE_RTL8723AU;
	DBG_8723A("CHIP TYPE: RTL8723A\n");
}