summaryrefslogtreecommitdiff
path: root/drivers/net/wireless/rtl818x/rtl8180_dev.c
blob: 7e65d7c31802097ff7194430589e6b10e0705e46 (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
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089

/*
 * Linux device driver for RTL8180 / RTL8185
 *
 * Copyright 2007 Michael Wu <flamingice@sourmilk.net>
 * Copyright 2007 Andrea Merello <andreamrl@tiscali.it>
 *
 * Based on the r8180 driver, which is:
 * Copyright 2004-2005 Andrea Merello <andreamrl@tiscali.it>, et al.
 *
 * Thanks to Realtek for their support!
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/init.h>
#include <linux/pci.h>
#include <linux/delay.h>
#include <linux/etherdevice.h>
#include <linux/eeprom_93cx6.h>
#include <net/mac80211.h>

#include "rtl8180.h"
#include "rtl8180_rtl8225.h"
#include "rtl8180_sa2400.h"
#include "rtl8180_max2820.h"
#include "rtl8180_grf5101.h"

MODULE_AUTHOR("Michael Wu <flamingice@sourmilk.net>");
MODULE_AUTHOR("Andrea Merello <andreamrl@tiscali.it>");
MODULE_DESCRIPTION("RTL8180 / RTL8185 PCI wireless driver");
MODULE_LICENSE("GPL");

static struct pci_device_id rtl8180_table[] __devinitdata = {
	/* rtl8185 */
	{ PCI_DEVICE(PCI_VENDOR_ID_REALTEK, 0x8185) },
	{ PCI_DEVICE(PCI_VENDOR_ID_BELKIN, 0x700f) },
	{ PCI_DEVICE(PCI_VENDOR_ID_BELKIN, 0x701f) },

	/* rtl8180 */
	{ PCI_DEVICE(PCI_VENDOR_ID_REALTEK, 0x8180) },
	{ PCI_DEVICE(0x1799, 0x6001) },
	{ PCI_DEVICE(0x1799, 0x6020) },
	{ PCI_DEVICE(PCI_VENDOR_ID_DLINK, 0x3300) },
	{ }
};

MODULE_DEVICE_TABLE(pci, rtl8180_table);

static const struct ieee80211_rate rtl818x_rates[] = {
	{ .bitrate = 10, .hw_value = 0, },
	{ .bitrate = 20, .hw_value = 1, },
	{ .bitrate = 55, .hw_value = 2, },
	{ .bitrate = 110, .hw_value = 3, },
	{ .bitrate = 60, .hw_value = 4, },
	{ .bitrate = 90, .hw_value = 5, },
	{ .bitrate = 120, .hw_value = 6, },
	{ .bitrate = 180, .hw_value = 7, },
	{ .bitrate = 240, .hw_value = 8, },
	{ .bitrate = 360, .hw_value = 9, },
	{ .bitrate = 480, .hw_value = 10, },
	{ .bitrate = 540, .hw_value = 11, },
};

static const struct ieee80211_channel rtl818x_channels[] = {
	{ .center_freq = 2412 },
	{ .center_freq = 2417 },
	{ .center_freq = 2422 },
	{ .center_freq = 2427 },
	{ .center_freq = 2432 },
	{ .center_freq = 2437 },
	{ .center_freq = 2442 },
	{ .center_freq = 2447 },
	{ .center_freq = 2452 },
	{ .center_freq = 2457 },
	{ .center_freq = 2462 },
	{ .center_freq = 2467 },
	{ .center_freq = 2472 },
	{ .center_freq = 2484 },
};




void rtl8180_write_phy(struct ieee80211_hw *dev, u8 addr, u32 data)
{
	struct rtl8180_priv *priv = dev->priv;
	int i = 10;
	u32 buf;

	buf = (data << 8) | addr;

	rtl818x_iowrite32(priv, (__le32 __iomem *)&priv->map->PHY[0], buf | 0x80);
	while (i--) {
		rtl818x_iowrite32(priv, (__le32 __iomem *)&priv->map->PHY[0], buf);
		if (rtl818x_ioread8(priv, &priv->map->PHY[2]) == (data & 0xFF))
			return;
	}
}

static void rtl8180_handle_rx(struct ieee80211_hw *dev)
{
	struct rtl8180_priv *priv = dev->priv;
	unsigned int count = 32;

	while (count--) {
		struct rtl8180_rx_desc *entry = &priv->rx_ring[priv->rx_idx];
		struct sk_buff *skb = priv->rx_buf[priv->rx_idx];
		u32 flags = le32_to_cpu(entry->flags);

		if (flags & RTL818X_RX_DESC_FLAG_OWN)
			return;

		if (unlikely(flags & (RTL818X_RX_DESC_FLAG_DMA_FAIL |
				      RTL818X_RX_DESC_FLAG_FOF |
				      RTL818X_RX_DESC_FLAG_RX_ERR)))
			goto done;
		else {
			u32 flags2 = le32_to_cpu(entry->flags2);
			struct ieee80211_rx_status rx_status = {0};
			struct sk_buff *new_skb = dev_alloc_skb(MAX_RX_SIZE);

			if (unlikely(!new_skb))
				goto done;

			pci_unmap_single(priv->pdev,
					 *((dma_addr_t *)skb->cb),
					 MAX_RX_SIZE, PCI_DMA_FROMDEVICE);
			skb_put(skb, flags & 0xFFF);

			rx_status.antenna = (flags2 >> 15) & 1;
			/* TODO: improve signal/rssi reporting */
			rx_status.qual = flags2 & 0xFF;
			rx_status.signal = (flags2 >> 8) & 0x7F;
			/* XXX: is this correct? */
			rx_status.rate_idx = (flags >> 20) & 0xF;
			rx_status.freq = dev->conf.channel->center_freq;
			rx_status.band = dev->conf.channel->band;
			rx_status.mactime = le64_to_cpu(entry->tsft);
			rx_status.flag |= RX_FLAG_TSFT;
			if (flags & RTL818X_RX_DESC_FLAG_CRC32_ERR)
				rx_status.flag |= RX_FLAG_FAILED_FCS_CRC;

			ieee80211_rx_irqsafe(dev, skb, &rx_status);

			skb = new_skb;
			priv->rx_buf[priv->rx_idx] = skb;
			*((dma_addr_t *) skb->cb) =
				pci_map_single(priv->pdev, skb_tail_pointer(skb),
					       MAX_RX_SIZE, PCI_DMA_FROMDEVICE);
		}

	done:
		entry->rx_buf = cpu_to_le32(*((dma_addr_t *)skb->cb));
		entry->flags = cpu_to_le32(RTL818X_RX_DESC_FLAG_OWN |
					   MAX_RX_SIZE);
		if (priv->rx_idx == 31)
			entry->flags |= cpu_to_le32(RTL818X_RX_DESC_FLAG_EOR);
		priv->rx_idx = (priv->rx_idx + 1) % 32;
	}
}

static void rtl8180_handle_tx(struct ieee80211_hw *dev, unsigned int prio)
{
	struct rtl8180_priv *priv = dev->priv;
	struct rtl8180_tx_ring *ring = &priv->tx_ring[prio];

	while (skb_queue_len(&ring->queue)) {
		struct rtl8180_tx_desc *entry = &ring->desc[ring->idx];
		struct sk_buff *skb;
		struct ieee80211_tx_info *info;
		u32 flags = le32_to_cpu(entry->flags);

		if (flags & RTL818X_TX_DESC_FLAG_OWN)
			return;

		ring->idx = (ring->idx + 1) % ring->entries;
		skb = __skb_dequeue(&ring->queue);
		pci_unmap_single(priv->pdev, le32_to_cpu(entry->tx_buf),
				 skb->len, PCI_DMA_TODEVICE);

		info = IEEE80211_SKB_CB(skb);
		ieee80211_tx_info_clear_status(info);

		if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) &&
		    (flags & RTL818X_TX_DESC_FLAG_TX_OK))
			info->flags |= IEEE80211_TX_STAT_ACK;

		info->status.rates[0].count = (flags & 0xFF) + 1;

		ieee80211_tx_status_irqsafe(dev, skb);
		if (ring->entries - skb_queue_len(&ring->queue) == 2)
			ieee80211_wake_queue(dev, prio);
	}
}

static irqreturn_t rtl8180_interrupt(int irq, void *dev_id)
{
	struct ieee80211_hw *dev = dev_id;
	struct rtl8180_priv *priv = dev->priv;
	u16 reg;

	spin_lock(&priv->lock);
	reg = rtl818x_ioread16(priv, &priv->map->INT_STATUS);
	if (unlikely(reg == 0xFFFF)) {
		spin_unlock(&priv->lock);
		return IRQ_HANDLED;
	}

	rtl818x_iowrite16(priv, &priv->map->INT_STATUS, reg);

	if (reg & (RTL818X_INT_TXB_OK | RTL818X_INT_TXB_ERR))
		rtl8180_handle_tx(dev, 3);

	if (reg & (RTL818X_INT_TXH_OK | RTL818X_INT_TXH_ERR))
		rtl8180_handle_tx(dev, 2);

	if (reg & (RTL818X_INT_TXN_OK | RTL818X_INT_TXN_ERR))
		rtl8180_handle_tx(dev, 1);

	if (reg & (RTL818X_INT_TXL_OK | RTL818X_INT_TXL_ERR))
		rtl8180_handle_tx(dev, 0);

	if (reg & (RTL818X_INT_RX_OK | RTL818X_INT_RX_ERR))
		rtl8180_handle_rx(dev);

	spin_unlock(&priv->lock);

	return IRQ_HANDLED;
}

static int rtl8180_tx(struct ieee80211_hw *dev, struct sk_buff *skb)
{
	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
	struct rtl8180_priv *priv = dev->priv;
	struct rtl8180_tx_ring *ring;
	struct rtl8180_tx_desc *entry;
	unsigned long flags;
	unsigned int idx, prio;
	dma_addr_t mapping;
	u32 tx_flags;
	u8 rc_flags;
	u16 plcp_len = 0;
	__le16 rts_duration = 0;

	prio = skb_get_queue_mapping(skb);
	ring = &priv->tx_ring[prio];

	mapping = pci_map_single(priv->pdev, skb->data,
				 skb->len, PCI_DMA_TODEVICE);

	tx_flags = RTL818X_TX_DESC_FLAG_OWN | RTL818X_TX_DESC_FLAG_FS |
		   RTL818X_TX_DESC_FLAG_LS |
		   (ieee80211_get_tx_rate(dev, info)->hw_value << 24) |
		   skb->len;

	if (priv->r8185)
		tx_flags |= RTL818X_TX_DESC_FLAG_DMA |
			    RTL818X_TX_DESC_FLAG_NO_ENC;

	rc_flags = info->control.rates[0].flags;
	if (rc_flags & IEEE80211_TX_RC_USE_RTS_CTS) {
		tx_flags |= RTL818X_TX_DESC_FLAG_RTS;
		tx_flags |= ieee80211_get_rts_cts_rate(dev, info)->hw_value << 19;
	} else if (rc_flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
		tx_flags |= RTL818X_TX_DESC_FLAG_CTS;
		tx_flags |= ieee80211_get_rts_cts_rate(dev, info)->hw_value << 19;
	}

	if (rc_flags & IEEE80211_TX_RC_USE_RTS_CTS)
		rts_duration = ieee80211_rts_duration(dev, priv->vif, skb->len,
						      info);

	if (!priv->r8185) {
		unsigned int remainder;

		plcp_len = DIV_ROUND_UP(16 * (skb->len + 4),
				(ieee80211_get_tx_rate(dev, info)->bitrate * 2) / 10);
		remainder = (16 * (skb->len + 4)) %
			    ((ieee80211_get_tx_rate(dev, info)->bitrate * 2) / 10);
		if (remainder > 0 && remainder <= 6)
			plcp_len |= 1 << 15;
	}

	spin_lock_irqsave(&priv->lock, flags);
	idx = (ring->idx + skb_queue_len(&ring->queue)) % ring->entries;
	entry = &ring->desc[idx];

	entry->rts_duration = rts_duration;
	entry->plcp_len = cpu_to_le16(plcp_len);
	entry->tx_buf = cpu_to_le32(mapping);
	entry->frame_len = cpu_to_le32(skb->len);
	entry->flags2 = info->control.rates[1].idx >= 0 ?
		ieee80211_get_alt_retry_rate(dev, info, 0)->bitrate << 4 : 0;
	entry->retry_limit = info->control.rates[0].count;
	entry->flags = cpu_to_le32(tx_flags);
	__skb_queue_tail(&ring->queue, skb);
	if (ring->entries - skb_queue_len(&ring->queue) < 2)
		ieee80211_stop_queue(dev, skb_get_queue_mapping(skb));
	spin_unlock_irqrestore(&priv->lock, flags);

	rtl818x_iowrite8(priv, &priv->map->TX_DMA_POLLING, (1 << (prio + 4)));

	return 0;
}

void rtl8180_set_anaparam(struct rtl8180_priv *priv, u32 anaparam)
{
	u8 reg;

	rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_CONFIG);
	reg = rtl818x_ioread8(priv, &priv->map->CONFIG3);
	rtl818x_iowrite8(priv, &priv->map->CONFIG3,
		 reg | RTL818X_CONFIG3_ANAPARAM_WRITE);
	rtl818x_iowrite32(priv, &priv->map->ANAPARAM, anaparam);
	rtl818x_iowrite8(priv, &priv->map->CONFIG3,
		 reg & ~RTL818X_CONFIG3_ANAPARAM_WRITE);
	rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_NORMAL);
}

static int rtl8180_init_hw(struct ieee80211_hw *dev)
{
	struct rtl8180_priv *priv = dev->priv;
	u16 reg;

	rtl818x_iowrite8(priv, &priv->map->CMD, 0);
	rtl818x_ioread8(priv, &priv->map->CMD);
	msleep(10);

	/* reset */
	rtl818x_iowrite16(priv, &priv->map->INT_MASK, 0);
	rtl818x_ioread8(priv, &priv->map->CMD);

	reg = rtl818x_ioread8(priv, &priv->map->CMD);
	reg &= (1 << 1);
	reg |= RTL818X_CMD_RESET;
	rtl818x_iowrite8(priv, &priv->map->CMD, RTL818X_CMD_RESET);
	rtl818x_ioread8(priv, &priv->map->CMD);
	msleep(200);

	/* check success of reset */
	if (rtl818x_ioread8(priv, &priv->map->CMD) & RTL818X_CMD_RESET) {
		printk(KERN_ERR "%s: reset timeout!\n", wiphy_name(dev->wiphy));
		return -ETIMEDOUT;
	}

	rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_LOAD);
	rtl818x_ioread8(priv, &priv->map->CMD);
	msleep(200);

	if (rtl818x_ioread8(priv, &priv->map->CONFIG3) & (1 << 3)) {
		/* For cardbus */
		reg = rtl818x_ioread8(priv, &priv->map->CONFIG3);
		reg |= 1 << 1;
		rtl818x_iowrite8(priv, &priv->map->CONFIG3, reg);
		reg = rtl818x_ioread16(priv, &priv->map->FEMR);
		reg |= (1 << 15) | (1 << 14) | (1 << 4);
		rtl818x_iowrite16(priv, &priv->map->FEMR, reg);
	}

	rtl818x_iowrite8(priv, &priv->map->MSR, 0);

	if (!priv->r8185)
		rtl8180_set_anaparam(priv, priv->anaparam);

	rtl818x_iowrite32(priv, &priv->map->RDSAR, priv->rx_ring_dma);
	rtl818x_iowrite32(priv, &priv->map->TBDA, priv->tx_ring[3].dma);
	rtl818x_iowrite32(priv, &priv->map->THPDA, priv->tx_ring[2].dma);
	rtl818x_iowrite32(priv, &priv->map->TNPDA, priv->tx_ring[1].dma);
	rtl818x_iowrite32(priv, &priv->map->TLPDA, priv->tx_ring[0].dma);

	/* TODO: necessary? specs indicate not */
	rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_CONFIG);
	reg = rtl818x_ioread8(priv, &priv->map->CONFIG2);
	rtl818x_iowrite8(priv, &priv->map->CONFIG2, reg & ~(1 << 3));
	if (priv->r8185) {
		reg = rtl818x_ioread8(priv, &priv->map->CONFIG2);
		rtl818x_iowrite8(priv, &priv->map->CONFIG2, reg | (1 << 4));
	}
	rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_NORMAL);

	/* TODO: set CONFIG5 for calibrating AGC on rtl8180 + philips radio? */

	/* TODO: turn off hw wep on rtl8180 */

	rtl818x_iowrite32(priv, &priv->map->INT_TIMEOUT, 0);

	if (priv->r8185) {
		rtl818x_iowrite8(priv, &priv->map->WPA_CONF, 0);
		rtl818x_iowrite8(priv, &priv->map->RATE_FALLBACK, 0x81);
		rtl818x_iowrite8(priv, &priv->map->RESP_RATE, (8 << 4) | 0);

		rtl818x_iowrite16(priv, &priv->map->BRSR, 0x01F3);

		/* TODO: set ClkRun enable? necessary? */
		reg = rtl818x_ioread8(priv, &priv->map->GP_ENABLE);
		rtl818x_iowrite8(priv, &priv->map->GP_ENABLE, reg & ~(1 << 6));
		rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_CONFIG);
		reg = rtl818x_ioread8(priv, &priv->map->CONFIG3);
		rtl818x_iowrite8(priv, &priv->map->CONFIG3, reg | (1 << 2));
		rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_NORMAL);
	} else {
		rtl818x_iowrite16(priv, &priv->map->BRSR, 0x1);
		rtl818x_iowrite8(priv, &priv->map->SECURITY, 0);

		rtl818x_iowrite8(priv, &priv->map->PHY_DELAY, 0x6);
		rtl818x_iowrite8(priv, &priv->map->CARRIER_SENSE_COUNTER, 0x4C);
	}

	priv->rf->init(dev);
	if (priv->r8185)
		rtl818x_iowrite16(priv, &priv->map->BRSR, 0x01F3);
	return 0;
}

static int rtl8180_init_rx_ring(struct ieee80211_hw *dev)
{
	struct rtl8180_priv *priv = dev->priv;
	struct rtl8180_rx_desc *entry;
	int i;

	priv->rx_ring = pci_alloc_consistent(priv->pdev,
					     sizeof(*priv->rx_ring) * 32,
					     &priv->rx_ring_dma);

	if (!priv->rx_ring || (unsigned long)priv->rx_ring & 0xFF) {
		printk(KERN_ERR "%s: Cannot allocate RX ring\n",
		       wiphy_name(dev->wiphy));
		return -ENOMEM;
	}

	memset(priv->rx_ring, 0, sizeof(*priv->rx_ring) * 32);
	priv->rx_idx = 0;

	for (i = 0; i < 32; i++) {
		struct sk_buff *skb = dev_alloc_skb(MAX_RX_SIZE);
		dma_addr_t *mapping;
		entry = &priv->rx_ring[i];
		if (!skb)
			return 0;

		priv->rx_buf[i] = skb;
		mapping = (dma_addr_t *)skb->cb;
		*mapping = pci_map_single(priv->pdev, skb_tail_pointer(skb),
					  MAX_RX_SIZE, PCI_DMA_FROMDEVICE);
		entry->rx_buf = cpu_to_le32(*mapping);
		entry->flags = cpu_to_le32(RTL818X_RX_DESC_FLAG_OWN |
					   MAX_RX_SIZE);
	}
	entry->flags |= cpu_to_le32(RTL818X_RX_DESC_FLAG_EOR);
	return 0;
}

static void rtl8180_free_rx_ring(struct ieee80211_hw *dev)
{
	struct rtl8180_priv *priv = dev->priv;
	int i;

	for (i = 0; i < 32; i++) {
		struct sk_buff *skb = priv->rx_buf[i];
		if (!skb)
			continue;

		pci_unmap_single(priv->pdev,
				 *((dma_addr_t *)skb->cb),
				 MAX_RX_SIZE, PCI_DMA_FROMDEVICE);
		kfree_skb(skb);
	}

	pci_free_consistent(priv->pdev, sizeof(*priv->rx_ring) * 32,
			    priv->rx_ring, priv->rx_ring_dma);
	priv->rx_ring = NULL;
}

static int rtl8180_init_tx_ring(struct ieee80211_hw *dev,
				unsigned int prio, unsigned int entries)
{
	struct rtl8180_priv *priv = dev->priv;
	struct rtl8180_tx_desc *ring;
	dma_addr_t dma;
	int i;

	ring = pci_alloc_consistent(priv->pdev, sizeof(*ring) * entries, &dma);
	if (!ring || (unsigned long)ring & 0xFF) {
		printk(KERN_ERR "%s: Cannot allocate TX ring (prio = %d)\n",
		       wiphy_name(dev->wiphy), prio);
		return -ENOMEM;
	}

	memset(ring, 0, sizeof(*ring)*entries);
	priv->tx_ring[prio].desc = ring;
	priv->tx_ring[prio].dma = dma;
	priv->tx_ring[prio].idx = 0;
	priv->tx_ring[prio].entries = entries;
	skb_queue_head_init(&priv->tx_ring[prio].queue);

	for (i = 0; i < entries; i++)
		ring[i].next_tx_desc =
			cpu_to_le32((u32)dma + ((i + 1) % entries) * sizeof(*ring));

	return 0;
}

static void rtl8180_free_tx_ring(struct ieee80211_hw *dev, unsigned int prio)
{
	struct rtl8180_priv *priv = dev->priv;
	struct rtl8180_tx_ring *ring = &priv->tx_ring[prio];

	while (skb_queue_len(&ring->queue)) {
		struct rtl8180_tx_desc *entry = &ring->desc[ring->idx];
		struct sk_buff *skb = __skb_dequeue(&ring->queue);

		pci_unmap_single(priv->pdev, le32_to_cpu(entry->tx_buf),
				 skb->len, PCI_DMA_TODEVICE);
		kfree_skb(skb);
		ring->idx = (ring->idx + 1) % ring->entries;
	}

	pci_free_consistent(priv->pdev, sizeof(*ring->desc)*ring->entries,
			    ring->desc, ring->dma);
	ring->desc = NULL;
}

static int rtl8180_start(struct ieee80211_hw *dev)
{
	struct rtl8180_priv *priv = dev->priv;
	int ret, i;
	u32 reg;

	ret = rtl8180_init_rx_ring(dev);
	if (ret)
		return ret;

	for (i = 0; i < 4; i++)
		if ((ret = rtl8180_init_tx_ring(dev, i, 16)))
			goto err_free_rings;

	ret = rtl8180_init_hw(dev);
	if (ret)
		goto err_free_rings;

	rtl818x_iowrite32(priv, &priv->map->RDSAR, priv->rx_ring_dma);
	rtl818x_iowrite32(priv, &priv->map->TBDA, priv->tx_ring[3].dma);
	rtl818x_iowrite32(priv, &priv->map->THPDA, priv->tx_ring[2].dma);
	rtl818x_iowrite32(priv, &priv->map->TNPDA, priv->tx_ring[1].dma);
	rtl818x_iowrite32(priv, &priv->map->TLPDA, priv->tx_ring[0].dma);

	ret = request_irq(priv->pdev->irq, &rtl8180_interrupt,
			  IRQF_SHARED, KBUILD_MODNAME, dev);
	if (ret) {
		printk(KERN_ERR "%s: failed to register IRQ handler\n",
		       wiphy_name(dev->wiphy));
		goto err_free_rings;
	}

	rtl818x_iowrite16(priv, &priv->map->INT_MASK, 0xFFFF);

	rtl818x_iowrite32(priv, &priv->map->MAR[0], ~0);
	rtl818x_iowrite32(priv, &priv->map->MAR[1], ~0);

	reg = RTL818X_RX_CONF_ONLYERLPKT |
	      RTL818X_RX_CONF_RX_AUTORESETPHY |
	      RTL818X_RX_CONF_MGMT |
	      RTL818X_RX_CONF_DATA |
	      (7 << 8 /* MAX RX DMA */) |
	      RTL818X_RX_CONF_BROADCAST |
	      RTL818X_RX_CONF_NICMAC;

	if (priv->r8185)
		reg |= RTL818X_RX_CONF_CSDM1 | RTL818X_RX_CONF_CSDM2;
	else {
		reg |= (priv->rfparam & RF_PARAM_CARRIERSENSE1)
			? RTL818X_RX_CONF_CSDM1 : 0;
		reg |= (priv->rfparam & RF_PARAM_CARRIERSENSE2)
			? RTL818X_RX_CONF_CSDM2 : 0;
	}

	priv->rx_conf = reg;
	rtl818x_iowrite32(priv, &priv->map->RX_CONF, reg);

	if (priv->r8185) {
		reg = rtl818x_ioread8(priv, &priv->map->CW_CONF);
		reg &= ~RTL818X_CW_CONF_PERPACKET_CW_SHIFT;
		reg |= RTL818X_CW_CONF_PERPACKET_RETRY_SHIFT;
		rtl818x_iowrite8(priv, &priv->map->CW_CONF, reg);

		reg = rtl818x_ioread8(priv, &priv->map->TX_AGC_CTL);
		reg &= ~RTL818X_TX_AGC_CTL_PERPACKET_GAIN_SHIFT;
		reg &= ~RTL818X_TX_AGC_CTL_PERPACKET_ANTSEL_SHIFT;
		reg |=  RTL818X_TX_AGC_CTL_FEEDBACK_ANT;
		rtl818x_iowrite8(priv, &priv->map->TX_AGC_CTL, reg);

		/* disable early TX */
		rtl818x_iowrite8(priv, (u8 __iomem *)priv->map + 0xec, 0x3f);
	}

	reg = rtl818x_ioread32(priv, &priv->map->TX_CONF);
	reg |= (6 << 21 /* MAX TX DMA */) |
	       RTL818X_TX_CONF_NO_ICV;

	if (priv->r8185)
		reg &= ~RTL818X_TX_CONF_PROBE_DTS;
	else
		reg &= ~RTL818X_TX_CONF_HW_SEQNUM;

	/* different meaning, same value on both rtl8185 and rtl8180 */
	reg &= ~RTL818X_TX_CONF_SAT_HWPLCP;

	rtl818x_iowrite32(priv, &priv->map->TX_CONF, reg);

	reg = rtl818x_ioread8(priv, &priv->map->CMD);
	reg |= RTL818X_CMD_RX_ENABLE;
	reg |= RTL818X_CMD_TX_ENABLE;
	rtl818x_iowrite8(priv, &priv->map->CMD, reg);

	priv->mode = NL80211_IFTYPE_MONITOR;
	return 0;

 err_free_rings:
	rtl8180_free_rx_ring(dev);
	for (i = 0; i < 4; i++)
		if (priv->tx_ring[i].desc)
			rtl8180_free_tx_ring(dev, i);

	return ret;
}

static void rtl8180_stop(struct ieee80211_hw *dev)
{
	struct rtl8180_priv *priv = dev->priv;
	u8 reg;
	int i;

	priv->mode = NL80211_IFTYPE_UNSPECIFIED;

	rtl818x_iowrite16(priv, &priv->map->INT_MASK, 0);

	reg = rtl818x_ioread8(priv, &priv->map->CMD);
	reg &= ~RTL818X_CMD_TX_ENABLE;
	reg &= ~RTL818X_CMD_RX_ENABLE;
	rtl818x_iowrite8(priv, &priv->map->CMD, reg);

	priv->rf->stop(dev);

	rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_CONFIG);
	reg = rtl818x_ioread8(priv, &priv->map->CONFIG4);
	rtl818x_iowrite8(priv, &priv->map->CONFIG4, reg | RTL818X_CONFIG4_VCOOFF);
	rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_NORMAL);

	free_irq(priv->pdev->irq, dev);

	rtl8180_free_rx_ring(dev);
	for (i = 0; i < 4; i++)
		rtl8180_free_tx_ring(dev, i);
}

static int rtl8180_add_interface(struct ieee80211_hw *dev,
				 struct ieee80211_if_init_conf *conf)
{
	struct rtl8180_priv *priv = dev->priv;

	if (priv->mode != NL80211_IFTYPE_MONITOR)
		return -EOPNOTSUPP;

	switch (conf->type) {
	case NL80211_IFTYPE_STATION:
		priv->mode = conf->type;
		break;
	default:
		return -EOPNOTSUPP;
	}

	priv->vif = conf->vif;

	rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_CONFIG);
	rtl818x_iowrite32(priv, (__le32 __iomem *)&priv->map->MAC[0],
			  le32_to_cpu(*(__le32 *)conf->mac_addr));
	rtl818x_iowrite16(priv, (__le16 __iomem *)&priv->map->MAC[4],
			  le16_to_cpu(*(__le16 *)(conf->mac_addr + 4)));
	rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_NORMAL);

	return 0;
}

static void rtl8180_remove_interface(struct ieee80211_hw *dev,
				     struct ieee80211_if_init_conf *conf)
{
	struct rtl8180_priv *priv = dev->priv;
	priv->mode = NL80211_IFTYPE_MONITOR;
	priv->vif = NULL;
}

static int rtl8180_config(struct ieee80211_hw *dev, u32 changed)
{
	struct rtl8180_priv *priv = dev->priv;
	struct ieee80211_conf *conf = &dev->conf;

	priv->rf->set_chan(dev, conf);

	return 0;
}

static void rtl8180_bss_info_changed(struct ieee80211_hw *dev,
				     struct ieee80211_vif *vif,
				     struct ieee80211_bss_conf *info,
				     u32 changed)
{
	struct rtl8180_priv *priv = dev->priv;
	int i;

	if (changed & BSS_CHANGED_BSSID) {
		for (i = 0; i < ETH_ALEN; i++)
			rtl818x_iowrite8(priv, &priv->map->BSSID[i],
					 info->bssid[i]);

		if (is_valid_ether_addr(info->bssid))
			rtl818x_iowrite8(priv, &priv->map->MSR,
					 RTL818X_MSR_INFRA);
		else
			rtl818x_iowrite8(priv, &priv->map->MSR,
					 RTL818X_MSR_NO_LINK);
	}

	if (changed & BSS_CHANGED_ERP_SLOT && priv->rf->conf_erp)
	        priv->rf->conf_erp(dev, info);
}

static void rtl8180_configure_filter(struct ieee80211_hw *dev,
				     unsigned int changed_flags,
				     unsigned int *total_flags,
				     int mc_count, struct dev_addr_list *mclist)
{
	struct rtl8180_priv *priv = dev->priv;

	if (changed_flags & FIF_FCSFAIL)
		priv->rx_conf ^= RTL818X_RX_CONF_FCS;
	if (changed_flags & FIF_CONTROL)
		priv->rx_conf ^= RTL818X_RX_CONF_CTRL;
	if (changed_flags & FIF_OTHER_BSS)
		priv->rx_conf ^= RTL818X_RX_CONF_MONITOR;
	if (*total_flags & FIF_ALLMULTI || mc_count > 0)
		priv->rx_conf |= RTL818X_RX_CONF_MULTICAST;
	else
		priv->rx_conf &= ~RTL818X_RX_CONF_MULTICAST;

	*total_flags = 0;

	if (priv->rx_conf & RTL818X_RX_CONF_FCS)
		*total_flags |= FIF_FCSFAIL;
	if (priv->rx_conf & RTL818X_RX_CONF_CTRL)
		*total_flags |= FIF_CONTROL;
	if (priv->rx_conf & RTL818X_RX_CONF_MONITOR)
		*total_flags |= FIF_OTHER_BSS;
	if (priv->rx_conf & RTL818X_RX_CONF_MULTICAST)
		*total_flags |= FIF_ALLMULTI;

	rtl818x_iowrite32(priv, &priv->map->RX_CONF, priv->rx_conf);
}

static const struct ieee80211_ops rtl8180_ops = {
	.tx			= rtl8180_tx,
	.start			= rtl8180_start,
	.stop			= rtl8180_stop,
	.add_interface		= rtl8180_add_interface,
	.remove_interface	= rtl8180_remove_interface,
	.config			= rtl8180_config,
	.bss_info_changed	= rtl8180_bss_info_changed,
	.configure_filter	= rtl8180_configure_filter,
};

static void rtl8180_eeprom_register_read(struct eeprom_93cx6 *eeprom)
{
	struct ieee80211_hw *dev = eeprom->data;
	struct rtl8180_priv *priv = dev->priv;
	u8 reg = rtl818x_ioread8(priv, &priv->map->EEPROM_CMD);

	eeprom->reg_data_in = reg & RTL818X_EEPROM_CMD_WRITE;
	eeprom->reg_data_out = reg & RTL818X_EEPROM_CMD_READ;
	eeprom->reg_data_clock = reg & RTL818X_EEPROM_CMD_CK;
	eeprom->reg_chip_select = reg & RTL818X_EEPROM_CMD_CS;
}

static void rtl8180_eeprom_register_write(struct eeprom_93cx6 *eeprom)
{
	struct ieee80211_hw *dev = eeprom->data;
	struct rtl8180_priv *priv = dev->priv;
	u8 reg = 2 << 6;

	if (eeprom->reg_data_in)
		reg |= RTL818X_EEPROM_CMD_WRITE;
	if (eeprom->reg_data_out)
		reg |= RTL818X_EEPROM_CMD_READ;
	if (eeprom->reg_data_clock)
		reg |= RTL818X_EEPROM_CMD_CK;
	if (eeprom->reg_chip_select)
		reg |= RTL818X_EEPROM_CMD_CS;

	rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, reg);
	rtl818x_ioread8(priv, &priv->map->EEPROM_CMD);
	udelay(10);
}

static int __devinit rtl8180_probe(struct pci_dev *pdev,
				   const struct pci_device_id *id)
{
	struct ieee80211_hw *dev;
	struct rtl8180_priv *priv;
	unsigned long mem_addr, mem_len;
	unsigned int io_addr, io_len;
	int err, i;
	struct eeprom_93cx6 eeprom;
	const char *chip_name, *rf_name = NULL;
	u32 reg;
	u16 eeprom_val;

	err = pci_enable_device(pdev);
	if (err) {
		printk(KERN_ERR "%s (rtl8180): Cannot enable new PCI device\n",
		       pci_name(pdev));
		return err;
	}

	err = pci_request_regions(pdev, KBUILD_MODNAME);
	if (err) {
		printk(KERN_ERR "%s (rtl8180): Cannot obtain PCI resources\n",
		       pci_name(pdev));
		return err;
	}

	io_addr = pci_resource_start(pdev, 0);
	io_len = pci_resource_len(pdev, 0);
	mem_addr = pci_resource_start(pdev, 1);
	mem_len = pci_resource_len(pdev, 1);

	if (mem_len < sizeof(struct rtl818x_csr) ||
	    io_len < sizeof(struct rtl818x_csr)) {
		printk(KERN_ERR "%s (rtl8180): Too short PCI resources\n",
		       pci_name(pdev));
		err = -ENOMEM;
		goto err_free_reg;
	}

	if ((err = pci_set_dma_mask(pdev, 0xFFFFFF00ULL)) ||
	    (err = pci_set_consistent_dma_mask(pdev, 0xFFFFFF00ULL))) {
		printk(KERN_ERR "%s (rtl8180): No suitable DMA available\n",
		       pci_name(pdev));
		goto err_free_reg;
	}

	pci_set_master(pdev);

	dev = ieee80211_alloc_hw(sizeof(*priv), &rtl8180_ops);
	if (!dev) {
		printk(KERN_ERR "%s (rtl8180): ieee80211 alloc failed\n",
		       pci_name(pdev));
		err = -ENOMEM;
		goto err_free_reg;
	}

	priv = dev->priv;
	priv->pdev = pdev;

	dev->max_rates = 2;
	SET_IEEE80211_DEV(dev, &pdev->dev);
	pci_set_drvdata(pdev, dev);

	priv->map = pci_iomap(pdev, 1, mem_len);
	if (!priv->map)
		priv->map = pci_iomap(pdev, 0, io_len);

	if (!priv->map) {
		printk(KERN_ERR "%s (rtl8180): Cannot map device memory\n",
		       pci_name(pdev));
		goto err_free_dev;
	}

	BUILD_BUG_ON(sizeof(priv->channels) != sizeof(rtl818x_channels));
	BUILD_BUG_ON(sizeof(priv->rates) != sizeof(rtl818x_rates));

	memcpy(priv->channels, rtl818x_channels, sizeof(rtl818x_channels));
	memcpy(priv->rates, rtl818x_rates, sizeof(rtl818x_rates));

	priv->band.band = IEEE80211_BAND_2GHZ;
	priv->band.channels = priv->channels;
	priv->band.n_channels = ARRAY_SIZE(rtl818x_channels);
	priv->band.bitrates = priv->rates;
	priv->band.n_bitrates = 4;
	dev->wiphy->bands[IEEE80211_BAND_2GHZ] = &priv->band;

	dev->flags = IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING |
		     IEEE80211_HW_RX_INCLUDES_FCS |
		     IEEE80211_HW_SIGNAL_UNSPEC;
	dev->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
	dev->queues = 1;
	dev->max_signal = 65;

	reg = rtl818x_ioread32(priv, &priv->map->TX_CONF);
	reg &= RTL818X_TX_CONF_HWVER_MASK;
	switch (reg) {
	case RTL818X_TX_CONF_R8180_ABCD:
		chip_name = "RTL8180";
		break;
	case RTL818X_TX_CONF_R8180_F:
		chip_name = "RTL8180vF";
		break;
	case RTL818X_TX_CONF_R8185_ABC:
		chip_name = "RTL8185";
		break;
	case RTL818X_TX_CONF_R8185_D:
		chip_name = "RTL8185vD";
		break;
	default:
		printk(KERN_ERR "%s (rtl8180): Unknown chip! (0x%x)\n",
		       pci_name(pdev), reg >> 25);
		goto err_iounmap;
	}

	priv->r8185 = reg & RTL818X_TX_CONF_R8185_ABC;
	if (priv->r8185) {
		priv->band.n_bitrates = ARRAY_SIZE(rtl818x_rates);
		pci_try_set_mwi(pdev);
	}

	eeprom.data = dev;
	eeprom.register_read = rtl8180_eeprom_register_read;
	eeprom.register_write = rtl8180_eeprom_register_write;
	if (rtl818x_ioread32(priv, &priv->map->RX_CONF) & (1 << 6))
		eeprom.width = PCI_EEPROM_WIDTH_93C66;
	else
		eeprom.width = PCI_EEPROM_WIDTH_93C46;

	rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_PROGRAM);
	rtl818x_ioread8(priv, &priv->map->EEPROM_CMD);
	udelay(10);

	eeprom_93cx6_read(&eeprom, 0x06, &eeprom_val);
	eeprom_val &= 0xFF;
	switch (eeprom_val) {
	case 1:	rf_name = "Intersil";
		break;
	case 2:	rf_name = "RFMD";
		break;
	case 3:	priv->rf = &sa2400_rf_ops;
		break;
	case 4:	priv->rf = &max2820_rf_ops;
		break;
	case 5:	priv->rf = &grf5101_rf_ops;
		break;
	case 9:	priv->rf = rtl8180_detect_rf(dev);
		break;
	case 10:
		rf_name = "RTL8255";
		break;
	default:
		printk(KERN_ERR "%s (rtl8180): Unknown RF! (0x%x)\n",
		       pci_name(pdev), eeprom_val);
		goto err_iounmap;
	}

	if (!priv->rf) {
		printk(KERN_ERR "%s (rtl8180): %s RF frontend not supported!\n",
		       pci_name(pdev), rf_name);
		goto err_iounmap;
	}

	eeprom_93cx6_read(&eeprom, 0x17, &eeprom_val);
	priv->csthreshold = eeprom_val >> 8;
	if (!priv->r8185) {
		__le32 anaparam;
		eeprom_93cx6_multiread(&eeprom, 0xD, (__le16 *)&anaparam, 2);
		priv->anaparam = le32_to_cpu(anaparam);
		eeprom_93cx6_read(&eeprom, 0x19, &priv->rfparam);
	}

	eeprom_93cx6_multiread(&eeprom, 0x7, (__le16 *)dev->wiphy->perm_addr, 3);
	if (!is_valid_ether_addr(dev->wiphy->perm_addr)) {
		printk(KERN_WARNING "%s (rtl8180): Invalid hwaddr! Using"
		       " randomly generated MAC addr\n", pci_name(pdev));
		random_ether_addr(dev->wiphy->perm_addr);
	}

	/* CCK TX power */
	for (i = 0; i < 14; i += 2) {
		u16 txpwr;
		eeprom_93cx6_read(&eeprom, 0x10 + (i >> 1), &txpwr);
		priv->channels[i].hw_value = txpwr & 0xFF;
		priv->channels[i + 1].hw_value = txpwr >> 8;
	}

	/* OFDM TX power */
	if (priv->r8185) {
		for (i = 0; i < 14; i += 2) {
			u16 txpwr;
			eeprom_93cx6_read(&eeprom, 0x20 + (i >> 1), &txpwr);
			priv->channels[i].hw_value |= (txpwr & 0xFF) << 8;
			priv->channels[i + 1].hw_value |= txpwr & 0xFF00;
		}
	}

	rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_NORMAL);

	spin_lock_init(&priv->lock);

	err = ieee80211_register_hw(dev);
	if (err) {
		printk(KERN_ERR "%s (rtl8180): Cannot register device\n",
		       pci_name(pdev));
		goto err_iounmap;
	}

	printk(KERN_INFO "%s: hwaddr %pM, %s + %s\n",
	       wiphy_name(dev->wiphy), dev->wiphy->perm_addr,
	       chip_name, priv->rf->name);

	return 0;

 err_iounmap:
	iounmap(priv->map);

 err_free_dev:
	pci_set_drvdata(pdev, NULL);
	ieee80211_free_hw(dev);

 err_free_reg:
	pci_release_regions(pdev);
	pci_disable_device(pdev);
	return err;
}

static void __devexit rtl8180_remove(struct pci_dev *pdev)
{
	struct ieee80211_hw *dev = pci_get_drvdata(pdev);
	struct rtl8180_priv *priv;

	if (!dev)
		return;

	ieee80211_unregister_hw(dev);

	priv = dev->priv;

	pci_iounmap(pdev, priv->map);
	pci_release_regions(pdev);
	pci_disable_device(pdev);
	ieee80211_free_hw(dev);
}

#ifdef CONFIG_PM
static int rtl8180_suspend(struct pci_dev *pdev, pm_message_t state)
{
	pci_save_state(pdev);
	pci_set_power_state(pdev, pci_choose_state(pdev, state));
	return 0;
}

static int rtl8180_resume(struct pci_dev *pdev)
{
	pci_set_power_state(pdev, PCI_D0);
	pci_restore_state(pdev);
	return 0;
}

#endif /* CONFIG_PM */

static struct pci_driver rtl8180_driver = {
	.name		= KBUILD_MODNAME,
	.id_table	= rtl8180_table,
	.probe		= rtl8180_probe,
	.remove		= __devexit_p(rtl8180_remove),
#ifdef CONFIG_PM
	.suspend	= rtl8180_suspend,
	.resume		= rtl8180_resume,
#endif /* CONFIG_PM */
};

static int __init rtl8180_init(void)
{
	return pci_register_driver(&rtl8180_driver);
}

static void __exit rtl8180_exit(void)
{
	pci_unregister_driver(&rtl8180_driver);
}

module_init(rtl8180_init);
module_exit(rtl8180_exit);