summaryrefslogtreecommitdiffstats
path: root/drivers/net/wireless/rtlwifi/usb.c
blob: b42c2e2b2055463089c0de2a6cc1882f13d9e5c0 (plain)
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
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
/******************************************************************************
 *
 * Copyright(c) 2009-2011  Realtek Corporation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
 *
 * The full GNU General Public License is included in this distribution in the
 * file called LICENSE.
 *
 * Contact Information:
 * wlanfae <wlanfae@realtek.com>
 * Realtek Corporation, No. 2, Innovation Road II, Hsinchu Science Park,
 * Hsinchu 300, Taiwan.
 *
 *****************************************************************************/

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/usb.h>
#include "core.h"
#include "wifi.h"
#include "usb.h"
#include "base.h"
#include "ps.h"

#define	REALTEK_USB_VENQT_READ			0xC0
#define	REALTEK_USB_VENQT_WRITE			0x40
#define REALTEK_USB_VENQT_CMD_REQ		0x05
#define	REALTEK_USB_VENQT_CMD_IDX		0x00

#define REALTEK_USB_VENQT_MAX_BUF_SIZE		254

static void usbctrl_async_callback(struct urb *urb)
{
	if (urb)
		kfree(urb->context);
}

static int _usbctrl_vendorreq_async_write(struct usb_device *udev, u8 request,
					  u16 value, u16 index, void *pdata,
					  u16 len)
{
	int rc;
	unsigned int pipe;
	u8 reqtype;
	struct usb_ctrlrequest *dr;
	struct urb *urb;
	struct rtl819x_async_write_data {
		u8 data[REALTEK_USB_VENQT_MAX_BUF_SIZE];
		struct usb_ctrlrequest dr;
	} *buf;

	pipe = usb_sndctrlpipe(udev, 0); /* write_out */
	reqtype =  REALTEK_USB_VENQT_WRITE;

	buf = kmalloc(sizeof(*buf), GFP_ATOMIC);
	if (!buf)
		return -ENOMEM;

	urb = usb_alloc_urb(0, GFP_ATOMIC);
	if (!urb) {
		kfree(buf);
		return -ENOMEM;
	}

	dr = &buf->dr;

	dr->bRequestType = reqtype;
	dr->bRequest = request;
	dr->wValue = cpu_to_le16(value);
	dr->wIndex = cpu_to_le16(index);
	dr->wLength = cpu_to_le16(len);
	memcpy(buf, pdata, len);
	usb_fill_control_urb(urb, udev, pipe,
			     (unsigned char *)dr, buf, len,
			     usbctrl_async_callback, buf);
	rc = usb_submit_urb(urb, GFP_ATOMIC);
	if (rc < 0)
		kfree(buf);
	usb_free_urb(urb);
	return rc;
}

static int _usbctrl_vendorreq_sync_read(struct usb_device *udev, u8 request,
					u16 value, u16 index, void *pdata,
					u16 len)
{
	unsigned int pipe;
	int status;
	u8 reqtype;

	pipe = usb_rcvctrlpipe(udev, 0); /* read_in */
	reqtype =  REALTEK_USB_VENQT_READ;

	status = usb_control_msg(udev, pipe, request, reqtype, value, index,
				 pdata, len, 0); /* max. timeout */

	if (status < 0)
		pr_err("reg 0x%x, usbctrl_vendorreq TimeOut! status:0x%x value=0x%x\n",
		       value, status, *(u32 *)pdata);
	return status;
}

static u32 _usb_read_sync(struct usb_device *udev, u32 addr, u16 len)
{
	u8 request;
	u16 wvalue;
	u16 index;
	u32 *data;
	u32 ret;

	data = kmalloc(sizeof(u32), GFP_KERNEL);
	if (!data)
		return -ENOMEM;
	request = REALTEK_USB_VENQT_CMD_REQ;
	index = REALTEK_USB_VENQT_CMD_IDX; /* n/a */

	wvalue = (u16)addr;
	_usbctrl_vendorreq_sync_read(udev, request, wvalue, index, data, len);
	ret = *data;
	kfree(data);
	return ret;
}

static u8 _usb_read8_sync(struct rtl_priv *rtlpriv, u32 addr)
{
	struct device *dev = rtlpriv->io.dev;

	return (u8)_usb_read_sync(to_usb_device(dev), addr, 1);
}

static u16 _usb_read16_sync(struct rtl_priv *rtlpriv, u32 addr)
{
	struct device *dev = rtlpriv->io.dev;

	return (u16)_usb_read_sync(to_usb_device(dev), addr, 2);
}

static u32 _usb_read32_sync(struct rtl_priv *rtlpriv, u32 addr)
{
	struct device *dev = rtlpriv->io.dev;

	return _usb_read_sync(to_usb_device(dev), addr, 4);
}

static void _usb_write_async(struct usb_device *udev, u32 addr, u32 val,
			     u16 len)
{
	u8 request;
	u16 wvalue;
	u16 index;
	u32 data;

	request = REALTEK_USB_VENQT_CMD_REQ;
	index = REALTEK_USB_VENQT_CMD_IDX; /* n/a */
	wvalue = (u16)(addr&0x0000ffff);
	data = val;
	_usbctrl_vendorreq_async_write(udev, request, wvalue, index, &data,
				       len);
}

static void _usb_write8_async(struct rtl_priv *rtlpriv, u32 addr, u8 val)
{
	struct device *dev = rtlpriv->io.dev;

	_usb_write_async(to_usb_device(dev), addr, val, 1);
}

static void _usb_write16_async(struct rtl_priv *rtlpriv, u32 addr, u16 val)
{
	struct device *dev = rtlpriv->io.dev;

	_usb_write_async(to_usb_device(dev), addr, val, 2);
}

static void _usb_write32_async(struct rtl_priv *rtlpriv, u32 addr, u32 val)
{
	struct device *dev = rtlpriv->io.dev;

	_usb_write_async(to_usb_device(dev), addr, val, 4);
}

static void _rtl_usb_io_handler_init(struct device *dev,
				     struct ieee80211_hw *hw)
{
	struct rtl_priv *rtlpriv = rtl_priv(hw);

	rtlpriv->io.dev = dev;
	mutex_init(&rtlpriv->io.bb_mutex);
	rtlpriv->io.write8_async	= _usb_write8_async;
	rtlpriv->io.write16_async	= _usb_write16_async;
	rtlpriv->io.write32_async	= _usb_write32_async;
	rtlpriv->io.read8_sync		= _usb_read8_sync;
	rtlpriv->io.read16_sync		= _usb_read16_sync;
	rtlpriv->io.read32_sync		= _usb_read32_sync;
}

static void _rtl_usb_io_handler_release(struct ieee80211_hw *hw)
{
	struct rtl_priv __maybe_unused *rtlpriv = rtl_priv(hw);

	mutex_destroy(&rtlpriv->io.bb_mutex);
}

/**
 *
 *	Default aggregation handler. Do nothing and just return the oldest skb.
 */
static struct sk_buff *_none_usb_tx_aggregate_hdl(struct ieee80211_hw *hw,
						  struct sk_buff_head *list)
{
	return skb_dequeue(list);
}

#define IS_HIGH_SPEED_USB(udev) \
		((USB_SPEED_HIGH == (udev)->speed) ? true : false)

static int _rtl_usb_init_tx(struct ieee80211_hw *hw)
{
	u32 i;
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));

	rtlusb->max_bulk_out_size = IS_HIGH_SPEED_USB(rtlusb->udev)
						    ? USB_HIGH_SPEED_BULK_SIZE
						    : USB_FULL_SPEED_BULK_SIZE;

	RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG, ("USB Max Bulk-out Size=%d\n",
		 rtlusb->max_bulk_out_size));

	for (i = 0; i < __RTL_TXQ_NUM; i++) {
		u32 ep_num = rtlusb->ep_map.ep_mapping[i];
		if (!ep_num) {
			RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG,
				 ("Invalid endpoint map setting!\n"));
			return -EINVAL;
		}
	}

	rtlusb->usb_tx_post_hdl =
		 rtlpriv->cfg->usb_interface_cfg->usb_tx_post_hdl;
	rtlusb->usb_tx_cleanup	=
		 rtlpriv->cfg->usb_interface_cfg->usb_tx_cleanup;
	rtlusb->usb_tx_aggregate_hdl =
		 (rtlpriv->cfg->usb_interface_cfg->usb_tx_aggregate_hdl)
		 ? rtlpriv->cfg->usb_interface_cfg->usb_tx_aggregate_hdl
		 : &_none_usb_tx_aggregate_hdl;

	init_usb_anchor(&rtlusb->tx_submitted);
	for (i = 0; i < RTL_USB_MAX_EP_NUM; i++) {
		skb_queue_head_init(&rtlusb->tx_skb_queue[i]);
		init_usb_anchor(&rtlusb->tx_pending[i]);
	}
	return 0;
}

static int _rtl_usb_init_rx(struct ieee80211_hw *hw)
{
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	struct rtl_usb_priv *usb_priv = rtl_usbpriv(hw);
	struct rtl_usb *rtlusb = rtl_usbdev(usb_priv);

	rtlusb->rx_max_size = rtlpriv->cfg->usb_interface_cfg->rx_max_size;
	rtlusb->rx_urb_num = rtlpriv->cfg->usb_interface_cfg->rx_urb_num;
	rtlusb->in_ep = rtlpriv->cfg->usb_interface_cfg->in_ep_num;
	rtlusb->usb_rx_hdl = rtlpriv->cfg->usb_interface_cfg->usb_rx_hdl;
	rtlusb->usb_rx_segregate_hdl =
		rtlpriv->cfg->usb_interface_cfg->usb_rx_segregate_hdl;

	pr_info("rx_max_size %d, rx_urb_num %d, in_ep %d\n",
		rtlusb->rx_max_size, rtlusb->rx_urb_num, rtlusb->in_ep);
	init_usb_anchor(&rtlusb->rx_submitted);
	return 0;
}

static int _rtl_usb_init(struct ieee80211_hw *hw)
{
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	struct rtl_usb_priv *usb_priv = rtl_usbpriv(hw);
	struct rtl_usb *rtlusb = rtl_usbdev(usb_priv);
	int err;
	u8 epidx;
	struct usb_interface	*usb_intf = rtlusb->intf;
	u8 epnums = usb_intf->cur_altsetting->desc.bNumEndpoints;

	rtlusb->out_ep_nums = rtlusb->in_ep_nums = 0;
	for (epidx = 0; epidx < epnums; epidx++) {
		struct usb_endpoint_descriptor *pep_desc;
		pep_desc = &usb_intf->cur_altsetting->endpoint[epidx].desc;

		if (usb_endpoint_dir_in(pep_desc))
			rtlusb->in_ep_nums++;
		else if (usb_endpoint_dir_out(pep_desc))
			rtlusb->out_ep_nums++;

		RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG,
			 ("USB EP(0x%02x), MaxPacketSize=%d ,Interval=%d.\n",
			 pep_desc->bEndpointAddress, pep_desc->wMaxPacketSize,
			 pep_desc->bInterval));
	}
	if (rtlusb->in_ep_nums <  rtlpriv->cfg->usb_interface_cfg->in_ep_num)
		return -EINVAL ;

	/* usb endpoint mapping */
	err = rtlpriv->cfg->usb_interface_cfg->usb_endpoint_mapping(hw);
	rtlusb->usb_mq_to_hwq =  rtlpriv->cfg->usb_interface_cfg->usb_mq_to_hwq;
	_rtl_usb_init_tx(hw);
	_rtl_usb_init_rx(hw);
	return err;
}

static int _rtl_usb_init_sw(struct ieee80211_hw *hw)
{
	struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
	struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
	struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
	struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));

	rtlhal->hw = hw;
	ppsc->inactiveps = false;
	ppsc->leisure_ps = false;
	ppsc->fwctrl_lps = false;
	ppsc->reg_fwctrl_lps = 3;
	ppsc->reg_max_lps_awakeintvl = 5;
	ppsc->fwctrl_psmode = FW_PS_DTIM_MODE;

	 /* IBSS */
	mac->beacon_interval = 100;

	 /* AMPDU */
	mac->min_space_cfg = 0;
	mac->max_mss_density = 0;

	/* set sane AMPDU defaults */
	mac->current_ampdu_density = 7;
	mac->current_ampdu_factor = 3;

	/* QOS */
	rtlusb->acm_method = eAcmWay2_SW;

	/* IRQ */
	/* HIMR - turn all on */
	rtlusb->irq_mask[0] = 0xFFFFFFFF;
	/* HIMR_EX - turn all on */
	rtlusb->irq_mask[1] = 0xFFFFFFFF;
	rtlusb->disableHWSM =  true;
	return 0;
}

#define __RADIO_TAP_SIZE_RSV	32

static void _rtl_rx_completed(struct urb *urb);

static struct sk_buff *_rtl_prep_rx_urb(struct ieee80211_hw *hw,
					struct rtl_usb *rtlusb,
					struct urb *urb,
					gfp_t gfp_mask)
{
	struct sk_buff *skb;
	struct rtl_priv *rtlpriv = rtl_priv(hw);

	skb = __dev_alloc_skb((rtlusb->rx_max_size + __RADIO_TAP_SIZE_RSV),
			       gfp_mask);
	if (!skb) {
		RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
			 ("Failed to __dev_alloc_skb!!\n"))
		return ERR_PTR(-ENOMEM);
	}

	/* reserve some space for mac80211's radiotap */
	skb_reserve(skb, __RADIO_TAP_SIZE_RSV);
	usb_fill_bulk_urb(urb, rtlusb->udev,
			  usb_rcvbulkpipe(rtlusb->udev, rtlusb->in_ep),
			  skb->data, min(skb_tailroom(skb),
			  (int)rtlusb->rx_max_size),
			  _rtl_rx_completed, skb);

	_rtl_install_trx_info(rtlusb, skb, rtlusb->in_ep);
	return skb;
}

#undef __RADIO_TAP_SIZE_RSV

static void _rtl_usb_rx_process_agg(struct ieee80211_hw *hw,
				    struct sk_buff *skb)
{
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	u8 *rxdesc = skb->data;
	struct ieee80211_hdr *hdr;
	bool unicast = false;
	__le16 fc;
	struct ieee80211_rx_status rx_status = {0};
	struct rtl_stats stats = {
		.signal = 0,
		.noise = -98,
		.rate = 0,
	};

	skb_pull(skb, RTL_RX_DESC_SIZE);
	rtlpriv->cfg->ops->query_rx_desc(hw, &stats, &rx_status, rxdesc, skb);
	skb_pull(skb, (stats.rx_drvinfo_size + stats.rx_bufshift));
	hdr = (struct ieee80211_hdr *)(skb->data);
	fc = hdr->frame_control;
	if (!stats.crc) {
		memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));

		if (is_broadcast_ether_addr(hdr->addr1)) {
			/*TODO*/;
		} else if (is_multicast_ether_addr(hdr->addr1)) {
			/*TODO*/
		} else {
			unicast = true;
			rtlpriv->stats.rxbytesunicast +=  skb->len;
		}

		rtl_is_special_data(hw, skb, false);

		if (ieee80211_is_data(fc)) {
			rtlpriv->cfg->ops->led_control(hw, LED_CTL_RX);

			if (unicast)
				rtlpriv->link_info.num_rx_inperiod++;
		}
	}
}

static void _rtl_usb_rx_process_noagg(struct ieee80211_hw *hw,
				      struct sk_buff *skb)
{
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	u8 *rxdesc = skb->data;
	struct ieee80211_hdr *hdr;
	bool unicast = false;
	__le16 fc;
	struct ieee80211_rx_status rx_status = {0};
	struct rtl_stats stats = {
		.signal = 0,
		.noise = -98,
		.rate = 0,
	};

	skb_pull(skb, RTL_RX_DESC_SIZE);
	rtlpriv->cfg->ops->query_rx_desc(hw, &stats, &rx_status, rxdesc, skb);
	skb_pull(skb, (stats.rx_drvinfo_size + stats.rx_bufshift));
	hdr = (struct ieee80211_hdr *)(skb->data);
	fc = hdr->frame_control;
	if (!stats.crc) {
		memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));

		if (is_broadcast_ether_addr(hdr->addr1)) {
			/*TODO*/;
		} else if (is_multicast_ether_addr(hdr->addr1)) {
			/*TODO*/
		} else {
			unicast = true;
			rtlpriv->stats.rxbytesunicast +=  skb->len;
		}

		rtl_is_special_data(hw, skb, false);

		if (ieee80211_is_data(fc)) {
			rtlpriv->cfg->ops->led_control(hw, LED_CTL_RX);

			if (unicast)
				rtlpriv->link_info.num_rx_inperiod++;
		}
		if (likely(rtl_action_proc(hw, skb, false))) {
			struct sk_buff *uskb = NULL;
			u8 *pdata;

			uskb = dev_alloc_skb(skb->len + 128);
			memcpy(IEEE80211_SKB_RXCB(uskb), &rx_status,
			       sizeof(rx_status));
			pdata = (u8 *)skb_put(uskb, skb->len);
			memcpy(pdata, skb->data, skb->len);
			dev_kfree_skb_any(skb);
			ieee80211_rx_irqsafe(hw, uskb);
		} else {
			dev_kfree_skb_any(skb);
		}
	}
}

static void _rtl_rx_pre_process(struct ieee80211_hw *hw, struct sk_buff *skb)
{
	struct sk_buff *_skb;
	struct sk_buff_head rx_queue;
	struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));

	skb_queue_head_init(&rx_queue);
	if (rtlusb->usb_rx_segregate_hdl)
		rtlusb->usb_rx_segregate_hdl(hw, skb, &rx_queue);
	WARN_ON(skb_queue_empty(&rx_queue));
	while (!skb_queue_empty(&rx_queue)) {
		_skb = skb_dequeue(&rx_queue);
		_rtl_usb_rx_process_agg(hw, skb);
		ieee80211_rx_irqsafe(hw, skb);
	}
}

static void _rtl_rx_completed(struct urb *_urb)
{
	struct sk_buff *skb = (struct sk_buff *)_urb->context;
	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
	struct rtl_usb *rtlusb = (struct rtl_usb *)info->rate_driver_data[0];
	struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf);
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	int err = 0;

	if (unlikely(IS_USB_STOP(rtlusb)))
		goto free;

	if (likely(0 == _urb->status)) {
		/* If this code were moved to work queue, would CPU
		 * utilization be improved?  NOTE: We shall allocate another skb
		 * and reuse the original one.
		 */
		skb_put(skb, _urb->actual_length);

		if (likely(!rtlusb->usb_rx_segregate_hdl)) {
			struct sk_buff *_skb;
			_rtl_usb_rx_process_noagg(hw, skb);
			_skb = _rtl_prep_rx_urb(hw, rtlusb, _urb, GFP_ATOMIC);
			if (IS_ERR(_skb)) {
				err = PTR_ERR(_skb);
				RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
					("Can't allocate skb for bulk IN!\n"));
				return;
			}
			skb = _skb;
		} else{
			/* TO DO */
			_rtl_rx_pre_process(hw, skb);
			pr_err("rx agg not supported\n");
		}
		goto resubmit;
	}

	switch (_urb->status) {
	/* disconnect */
	case -ENOENT:
	case -ECONNRESET:
	case -ENODEV:
	case -ESHUTDOWN:
		goto free;
	default:
		break;
	}

resubmit:
	skb_reset_tail_pointer(skb);
	skb_trim(skb, 0);

	usb_anchor_urb(_urb, &rtlusb->rx_submitted);
	err = usb_submit_urb(_urb, GFP_ATOMIC);
	if (unlikely(err)) {
		usb_unanchor_urb(_urb);
		goto free;
	}
	return;

free:
	dev_kfree_skb_irq(skb);
}

static int _rtl_usb_receive(struct ieee80211_hw *hw)
{
	struct urb *urb;
	struct sk_buff *skb;
	int err;
	int i;
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));

	WARN_ON(0 == rtlusb->rx_urb_num);
	/* 1600 == 1514 + max WLAN header + rtk info */
	WARN_ON(rtlusb->rx_max_size < 1600);

	for (i = 0; i < rtlusb->rx_urb_num; i++) {
		err = -ENOMEM;
		urb = usb_alloc_urb(0, GFP_KERNEL);
		if (!urb) {
			RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
				 ("Failed to alloc URB!!\n"))
			goto err_out;
		}

		skb = _rtl_prep_rx_urb(hw, rtlusb, urb, GFP_KERNEL);
		if (IS_ERR(skb)) {
			RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
				 ("Failed to prep_rx_urb!!\n"))
			err = PTR_ERR(skb);
			goto err_out;
		}

		usb_anchor_urb(urb, &rtlusb->rx_submitted);
		err = usb_submit_urb(urb, GFP_KERNEL);
		if (err)
			goto err_out;
		usb_free_urb(urb);
	}
	return 0;

err_out:
	usb_kill_anchored_urbs(&rtlusb->rx_submitted);
	return err;
}

static int rtl_usb_start(struct ieee80211_hw *hw)
{
	int err;
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
	struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));

	err = rtlpriv->cfg->ops->hw_init(hw);
	rtl_init_rx_config(hw);

	/* Enable software */
	SET_USB_START(rtlusb);
	/* should after adapter start and interrupt enable. */
	set_hal_start(rtlhal);

	/* Start bulk IN */
	_rtl_usb_receive(hw);

	return err;
}
/**
 *
 *
 */

/*=======================  tx =========================================*/
static void rtl_usb_cleanup(struct ieee80211_hw *hw)
{
	u32 i;
	struct sk_buff *_skb;
	struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
	struct ieee80211_tx_info *txinfo;

	SET_USB_STOP(rtlusb);

	/* clean up rx stuff. */
	usb_kill_anchored_urbs(&rtlusb->rx_submitted);

	/* clean up tx stuff */
	for (i = 0; i < RTL_USB_MAX_EP_NUM; i++) {
		while ((_skb = skb_dequeue(&rtlusb->tx_skb_queue[i]))) {
			rtlusb->usb_tx_cleanup(hw, _skb);
			txinfo = IEEE80211_SKB_CB(_skb);
			ieee80211_tx_info_clear_status(txinfo);
			txinfo->flags |= IEEE80211_TX_STAT_ACK;
			ieee80211_tx_status_irqsafe(hw, _skb);
		}
		usb_kill_anchored_urbs(&rtlusb->tx_pending[i]);
	}
	usb_kill_anchored_urbs(&rtlusb->tx_submitted);
}

/**
 *
 * We may add some struct into struct rtl_usb later. Do deinit here.
 *
 */
static void rtl_usb_deinit(struct ieee80211_hw *hw)
{
	rtl_usb_cleanup(hw);
}

static void rtl_usb_stop(struct ieee80211_hw *hw)
{
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
	struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));

	/* should after adapter start and interrupt enable. */
	set_hal_stop(rtlhal);
	/* Enable software */
	SET_USB_STOP(rtlusb);
	rtl_usb_deinit(hw);
	rtlpriv->cfg->ops->hw_disable(hw);
}

static void _rtl_submit_tx_urb(struct ieee80211_hw *hw, struct urb *_urb)
{
	int err;
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));

	usb_anchor_urb(_urb, &rtlusb->tx_submitted);
	err = usb_submit_urb(_urb, GFP_ATOMIC);
	if (err < 0) {
		struct sk_buff *skb;

		RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
			 ("Failed to submit urb.\n"));
		usb_unanchor_urb(_urb);
		skb = (struct sk_buff *)_urb->context;
		kfree_skb(skb);
	}
	usb_free_urb(_urb);
}

static int _usb_tx_post(struct ieee80211_hw *hw, struct urb *urb,
			struct sk_buff *skb)
{
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
	struct ieee80211_tx_info *txinfo;

	rtlusb->usb_tx_post_hdl(hw, urb, skb);
	skb_pull(skb, RTL_TX_HEADER_SIZE);
	txinfo = IEEE80211_SKB_CB(skb);
	ieee80211_tx_info_clear_status(txinfo);
	txinfo->flags |= IEEE80211_TX_STAT_ACK;

	if (urb->status) {
		RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
			 ("Urb has error status 0x%X\n", urb->status));
		goto out;
	}
	/*  TODO:	statistics */
out:
	ieee80211_tx_status_irqsafe(hw, skb);
	return urb->status;
}

static void _rtl_tx_complete(struct urb *urb)
{
	struct sk_buff *skb = (struct sk_buff *)urb->context;
	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
	struct rtl_usb *rtlusb = (struct rtl_usb *)info->rate_driver_data[0];
	struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf);
	int err;

	if (unlikely(IS_USB_STOP(rtlusb)))
		return;
	err = _usb_tx_post(hw, urb, skb);
	if (err) {
		/* Ignore error and keep issuiing other urbs */
		return;
	}
}

static struct urb *_rtl_usb_tx_urb_setup(struct ieee80211_hw *hw,
				struct sk_buff *skb, u32 ep_num)
{
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
	struct urb *_urb;

	WARN_ON(NULL == skb);
	_urb = usb_alloc_urb(0, GFP_ATOMIC);
	if (!_urb) {
		RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
			 ("Can't allocate URB for bulk out!\n"));
		kfree_skb(skb);
		return NULL;
	}
	_rtl_install_trx_info(rtlusb, skb, ep_num);
	usb_fill_bulk_urb(_urb, rtlusb->udev, usb_sndbulkpipe(rtlusb->udev,
			  ep_num), skb->data, skb->len, _rtl_tx_complete, skb);
	_urb->transfer_flags |= URB_ZERO_PACKET;
	return _urb;
}

static void _rtl_usb_transmit(struct ieee80211_hw *hw, struct sk_buff *skb,
		       enum rtl_txq qnum)
{
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
	u32 ep_num;
	struct urb *_urb = NULL;
	struct sk_buff *_skb = NULL;
	struct sk_buff_head *skb_list;
	struct usb_anchor *urb_list;

	WARN_ON(NULL == rtlusb->usb_tx_aggregate_hdl);
	if (unlikely(IS_USB_STOP(rtlusb))) {
		RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
			 ("USB device is stopping...\n"));
		kfree_skb(skb);
		return;
	}
	ep_num = rtlusb->ep_map.ep_mapping[qnum];
	skb_list = &rtlusb->tx_skb_queue[ep_num];
	_skb = skb;
	_urb = _rtl_usb_tx_urb_setup(hw, _skb, ep_num);
	if (unlikely(!_urb)) {
		RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG,
			 ("Can't allocate urb. Drop skb!\n"));
		return;
	}
	urb_list = &rtlusb->tx_pending[ep_num];
	_rtl_submit_tx_urb(hw, _urb);
}

static void _rtl_usb_tx_preprocess(struct ieee80211_hw *hw, struct sk_buff *skb,
			    u16 hw_queue)
{
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
	struct rtl_tx_desc *pdesc = NULL;
	struct rtl_tcb_desc tcb_desc;
	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
	__le16 fc = hdr->frame_control;
	u8 *pda_addr = hdr->addr1;
	/* ssn */
	u8 *qc = NULL;
	u8 tid = 0;
	u16 seq_number = 0;

	memset(&tcb_desc, 0, sizeof(struct rtl_tcb_desc));
	if (ieee80211_is_auth(fc)) {
		RT_TRACE(rtlpriv, COMP_SEND, DBG_DMESG, ("MAC80211_LINKING\n"));
		rtl_ips_nic_on(hw);
	}

	if (rtlpriv->psc.sw_ps_enabled) {
		if (ieee80211_is_data(fc) && !ieee80211_is_nullfunc(fc) &&
		    !ieee80211_has_pm(fc))
			hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
	}

	rtl_action_proc(hw, skb, true);
	if (is_multicast_ether_addr(pda_addr))
		rtlpriv->stats.txbytesmulticast += skb->len;
	else if (is_broadcast_ether_addr(pda_addr))
		rtlpriv->stats.txbytesbroadcast += skb->len;
	else
		rtlpriv->stats.txbytesunicast += skb->len;
	if (ieee80211_is_data_qos(fc)) {
		qc = ieee80211_get_qos_ctl(hdr);
		tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
		seq_number = (le16_to_cpu(hdr->seq_ctrl) &
			     IEEE80211_SCTL_SEQ) >> 4;
		seq_number += 1;
		seq_number <<= 4;
	}
	rtlpriv->cfg->ops->fill_tx_desc(hw, hdr, (u8 *)pdesc, info, skb,
					hw_queue, &tcb_desc);
	if (!ieee80211_has_morefrags(hdr->frame_control)) {
		if (qc)
			mac->tids[tid].seq_number = seq_number;
	}
	if (ieee80211_is_data(fc))
		rtlpriv->cfg->ops->led_control(hw, LED_CTL_TX);
}

static int rtl_usb_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
		      struct rtl_tcb_desc *dummy)
{
	struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
	struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
	__le16 fc = hdr->frame_control;
	u16 hw_queue;

	if (unlikely(is_hal_stop(rtlhal)))
		goto err_free;
	hw_queue = rtlusb->usb_mq_to_hwq(fc, skb_get_queue_mapping(skb));
	_rtl_usb_tx_preprocess(hw, skb, hw_queue);
	_rtl_usb_transmit(hw, skb, hw_queue);
	return NETDEV_TX_OK;

err_free:
	dev_kfree_skb_any(skb);
	return NETDEV_TX_OK;
}

static bool rtl_usb_tx_chk_waitq_insert(struct ieee80211_hw *hw,
					struct sk_buff *skb)
{
	return false;
}

static struct rtl_intf_ops rtl_usb_ops = {
	.adapter_start = rtl_usb_start,
	.adapter_stop = rtl_usb_stop,
	.adapter_tx = rtl_usb_tx,
	.waitq_insert = rtl_usb_tx_chk_waitq_insert,
};

int __devinit rtl_usb_probe(struct usb_interface *intf,
			const struct usb_device_id *id)
{
	int err;
	struct ieee80211_hw *hw = NULL;
	struct rtl_priv *rtlpriv = NULL;
	struct usb_device	*udev;
	struct rtl_usb_priv *usb_priv;

	hw = ieee80211_alloc_hw(sizeof(struct rtl_priv) +
				sizeof(struct rtl_usb_priv), &rtl_ops);
	if (!hw) {
		RT_ASSERT(false, ("%s : ieee80211 alloc failed\n", __func__));
		return -ENOMEM;
	}
	rtlpriv = hw->priv;
	SET_IEEE80211_DEV(hw, &intf->dev);
	udev = interface_to_usbdev(intf);
	usb_get_dev(udev);
	usb_priv = rtl_usbpriv(hw);
	memset(usb_priv, 0, sizeof(*usb_priv));
	usb_priv->dev.intf = intf;
	usb_priv->dev.udev = udev;
	usb_set_intfdata(intf, hw);
	/* init cfg & intf_ops */
	rtlpriv->rtlhal.interface = INTF_USB;
	rtlpriv->cfg = (struct rtl_hal_cfg *)(id->driver_info);
	rtlpriv->intf_ops = &rtl_usb_ops;
	rtl_dbgp_flag_init(hw);
	/* Init IO handler */
	_rtl_usb_io_handler_init(&udev->dev, hw);
	rtlpriv->cfg->ops->read_chip_version(hw);
	/*like read eeprom and so on */
	rtlpriv->cfg->ops->read_eeprom_info(hw);
	if (rtlpriv->cfg->ops->init_sw_vars(hw)) {
		RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG,
			 ("Can't init_sw_vars.\n"));
		goto error_out;
	}
	rtlpriv->cfg->ops->init_sw_leds(hw);
	err = _rtl_usb_init(hw);
	err = _rtl_usb_init_sw(hw);
	/* Init mac80211 sw */
	err = rtl_init_core(hw);
	if (err) {
		RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG,
			 ("Can't allocate sw for mac80211.\n"));
		goto error_out;
	}

	/*init rfkill */
	/* rtl_init_rfkill(hw); */

	err = ieee80211_register_hw(hw);
	if (err) {
		RT_TRACE(rtlpriv, COMP_INIT, DBG_EMERG,
			 ("Can't register mac80211 hw.\n"));
		goto error_out;
	} else {
		rtlpriv->mac80211.mac80211_registered = 1;
	}
	set_bit(RTL_STATUS_INTERFACE_START, &rtlpriv->status);
	return 0;
error_out:
	rtl_deinit_core(hw);
	_rtl_usb_io_handler_release(hw);
	ieee80211_free_hw(hw);
	usb_put_dev(udev);
	return -ENODEV;
}
EXPORT_SYMBOL(rtl_usb_probe);

void rtl_usb_disconnect(struct usb_interface *intf)
{
	struct ieee80211_hw *hw = usb_get_intfdata(intf);
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	struct rtl_mac *rtlmac = rtl_mac(rtl_priv(hw));
	struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));

	if (unlikely(!rtlpriv))
		return;
	/*ieee80211_unregister_hw will call ops_stop */
	if (rtlmac->mac80211_registered == 1) {
		ieee80211_unregister_hw(hw);
		rtlmac->mac80211_registered = 0;
	} else {
		rtl_deinit_deferred_work(hw);
		rtlpriv->intf_ops->adapter_stop(hw);
	}
	/*deinit rfkill */
	/* rtl_deinit_rfkill(hw); */
	rtl_usb_deinit(hw);
	rtl_deinit_core(hw);
	rtlpriv->cfg->ops->deinit_sw_leds(hw);
	rtlpriv->cfg->ops->deinit_sw_vars(hw);
	_rtl_usb_io_handler_release(hw);
	usb_put_dev(rtlusb->udev);
	usb_set_intfdata(intf, NULL);
	ieee80211_free_hw(hw);
}
EXPORT_SYMBOL(rtl_usb_disconnect);

int rtl_usb_suspend(struct usb_interface *pusb_intf, pm_message_t message)
{
	return 0;
}
EXPORT_SYMBOL(rtl_usb_suspend);

int rtl_usb_resume(struct usb_interface *pusb_intf)
{
	return 0;
}
EXPORT_SYMBOL(rtl_usb_resume);
OpenPOWER on IntegriCloud