aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/net/dsa/mv88e6xxx.c
blob: 9f0c2b9d58aed868968045ebdb24603e8b81e01e (plain) (blame)
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
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
/*
 * net/dsa/mv88e6xxx.c - Marvell 88e6xxx switch chip support
 * Copyright (c) 2008 Marvell Semiconductor
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 */

#include <linux/delay.h>
#include <linux/etherdevice.h>
#include <linux/if_bridge.h>
#include <linux/jiffies.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/netdevice.h>
#include <linux/phy.h>
#include <net/dsa.h>
#include "mv88e6xxx.h"

/* If the switch's ADDR[4:0] strap pins are strapped to zero, it will
 * use all 32 SMI bus addresses on its SMI bus, and all switch registers
 * will be directly accessible on some {device address,register address}
 * pair.  If the ADDR[4:0] pins are not strapped to zero, the switch
 * will only respond to SMI transactions to that specific address, and
 * an indirect addressing mechanism needs to be used to access its
 * registers.
 */
static int mv88e6xxx_reg_wait_ready(struct mii_bus *bus, int sw_addr)
{
	int ret;
	int i;

	for (i = 0; i < 16; i++) {
		ret = mdiobus_read(bus, sw_addr, SMI_CMD);
		if (ret < 0)
			return ret;

		if ((ret & SMI_CMD_BUSY) == 0)
			return 0;
	}

	return -ETIMEDOUT;
}

int __mv88e6xxx_reg_read(struct mii_bus *bus, int sw_addr, int addr, int reg)
{
	int ret;

	if (sw_addr == 0)
		return mdiobus_read(bus, addr, reg);

	/* Wait for the bus to become free. */
	ret = mv88e6xxx_reg_wait_ready(bus, sw_addr);
	if (ret < 0)
		return ret;

	/* Transmit the read command. */
	ret = mdiobus_write(bus, sw_addr, SMI_CMD,
			    SMI_CMD_OP_22_READ | (addr << 5) | reg);
	if (ret < 0)
		return ret;

	/* Wait for the read command to complete. */
	ret = mv88e6xxx_reg_wait_ready(bus, sw_addr);
	if (ret < 0)
		return ret;

	/* Read the data. */
	ret = mdiobus_read(bus, sw_addr, SMI_DATA);
	if (ret < 0)
		return ret;

	return ret & 0xffff;
}

/* Must be called with SMI mutex held */
static int _mv88e6xxx_reg_read(struct dsa_switch *ds, int addr, int reg)
{
	struct mii_bus *bus = dsa_host_dev_to_mii_bus(ds->master_dev);
	int ret;

	if (bus == NULL)
		return -EINVAL;

	ret = __mv88e6xxx_reg_read(bus, ds->pd->sw_addr, addr, reg);
	if (ret < 0)
		return ret;

	dev_dbg(ds->master_dev, "<- addr: 0x%.2x reg: 0x%.2x val: 0x%.4x\n",
		addr, reg, ret);

	return ret;
}

int mv88e6xxx_reg_read(struct dsa_switch *ds, int addr, int reg)
{
	struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);
	int ret;

	mutex_lock(&ps->smi_mutex);
	ret = _mv88e6xxx_reg_read(ds, addr, reg);
	mutex_unlock(&ps->smi_mutex);

	return ret;
}

int __mv88e6xxx_reg_write(struct mii_bus *bus, int sw_addr, int addr,
			  int reg, u16 val)
{
	int ret;

	if (sw_addr == 0)
		return mdiobus_write(bus, addr, reg, val);

	/* Wait for the bus to become free. */
	ret = mv88e6xxx_reg_wait_ready(bus, sw_addr);
	if (ret < 0)
		return ret;

	/* Transmit the data to write. */
	ret = mdiobus_write(bus, sw_addr, SMI_DATA, val);
	if (ret < 0)
		return ret;

	/* Transmit the write command. */
	ret = mdiobus_write(bus, sw_addr, SMI_CMD,
			    SMI_CMD_OP_22_WRITE | (addr << 5) | reg);
	if (ret < 0)
		return ret;

	/* Wait for the write command to complete. */
	ret = mv88e6xxx_reg_wait_ready(bus, sw_addr);
	if (ret < 0)
		return ret;

	return 0;
}

/* Must be called with SMI mutex held */
static int _mv88e6xxx_reg_write(struct dsa_switch *ds, int addr, int reg,
				u16 val)
{
	struct mii_bus *bus = dsa_host_dev_to_mii_bus(ds->master_dev);

	if (bus == NULL)
		return -EINVAL;

	dev_dbg(ds->master_dev, "-> addr: 0x%.2x reg: 0x%.2x val: 0x%.4x\n",
		addr, reg, val);

	return __mv88e6xxx_reg_write(bus, ds->pd->sw_addr, addr, reg, val);
}

int mv88e6xxx_reg_write(struct dsa_switch *ds, int addr, int reg, u16 val)
{
	struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);
	int ret;

	mutex_lock(&ps->smi_mutex);
	ret = _mv88e6xxx_reg_write(ds, addr, reg, val);
	mutex_unlock(&ps->smi_mutex);

	return ret;
}

int mv88e6xxx_config_prio(struct dsa_switch *ds)
{
	/* Configure the IP ToS mapping registers. */
	REG_WRITE(REG_GLOBAL, GLOBAL_IP_PRI_0, 0x0000);
	REG_WRITE(REG_GLOBAL, GLOBAL_IP_PRI_1, 0x0000);
	REG_WRITE(REG_GLOBAL, GLOBAL_IP_PRI_2, 0x5555);
	REG_WRITE(REG_GLOBAL, GLOBAL_IP_PRI_3, 0x5555);
	REG_WRITE(REG_GLOBAL, GLOBAL_IP_PRI_4, 0xaaaa);
	REG_WRITE(REG_GLOBAL, GLOBAL_IP_PRI_5, 0xaaaa);
	REG_WRITE(REG_GLOBAL, GLOBAL_IP_PRI_6, 0xffff);
	REG_WRITE(REG_GLOBAL, GLOBAL_IP_PRI_7, 0xffff);

	/* Configure the IEEE 802.1p priority mapping register. */
	REG_WRITE(REG_GLOBAL, GLOBAL_IEEE_PRI, 0xfa41);

	return 0;
}

int mv88e6xxx_set_addr_direct(struct dsa_switch *ds, u8 *addr)
{
	REG_WRITE(REG_GLOBAL, GLOBAL_MAC_01, (addr[0] << 8) | addr[1]);
	REG_WRITE(REG_GLOBAL, GLOBAL_MAC_23, (addr[2] << 8) | addr[3]);
	REG_WRITE(REG_GLOBAL, GLOBAL_MAC_45, (addr[4] << 8) | addr[5]);

	return 0;
}

int mv88e6xxx_set_addr_indirect(struct dsa_switch *ds, u8 *addr)
{
	int i;
	int ret;

	for (i = 0; i < 6; i++) {
		int j;

		/* Write the MAC address byte. */
		REG_WRITE(REG_GLOBAL2, GLOBAL2_SWITCH_MAC,
			  GLOBAL2_SWITCH_MAC_BUSY | (i << 8) | addr[i]);

		/* Wait for the write to complete. */
		for (j = 0; j < 16; j++) {
			ret = REG_READ(REG_GLOBAL2, GLOBAL2_SWITCH_MAC);
			if ((ret & GLOBAL2_SWITCH_MAC_BUSY) == 0)
				break;
		}
		if (j == 16)
			return -ETIMEDOUT;
	}

	return 0;
}

/* Must be called with phy mutex held */
static int _mv88e6xxx_phy_read(struct dsa_switch *ds, int addr, int regnum)
{
	if (addr >= 0)
		return mv88e6xxx_reg_read(ds, addr, regnum);
	return 0xffff;
}

/* Must be called with phy mutex held */
static int _mv88e6xxx_phy_write(struct dsa_switch *ds, int addr, int regnum,
				u16 val)
{
	if (addr >= 0)
		return mv88e6xxx_reg_write(ds, addr, regnum, val);
	return 0;
}

#ifdef CONFIG_NET_DSA_MV88E6XXX_NEED_PPU
static int mv88e6xxx_ppu_disable(struct dsa_switch *ds)
{
	int ret;
	unsigned long timeout;

	ret = REG_READ(REG_GLOBAL, GLOBAL_CONTROL);
	REG_WRITE(REG_GLOBAL, GLOBAL_CONTROL,
		  ret & ~GLOBAL_CONTROL_PPU_ENABLE);

	timeout = jiffies + 1 * HZ;
	while (time_before(jiffies, timeout)) {
		ret = REG_READ(REG_GLOBAL, GLOBAL_STATUS);
		usleep_range(1000, 2000);
		if ((ret & GLOBAL_STATUS_PPU_MASK) !=
		    GLOBAL_STATUS_PPU_POLLING)
			return 0;
	}

	return -ETIMEDOUT;
}

static int mv88e6xxx_ppu_enable(struct dsa_switch *ds)
{
	int ret;
	unsigned long timeout;

	ret = REG_READ(REG_GLOBAL, GLOBAL_CONTROL);
	REG_WRITE(REG_GLOBAL, GLOBAL_CONTROL, ret | GLOBAL_CONTROL_PPU_ENABLE);

	timeout = jiffies + 1 * HZ;
	while (time_before(jiffies, timeout)) {
		ret = REG_READ(REG_GLOBAL, GLOBAL_STATUS);
		usleep_range(1000, 2000);
		if ((ret & GLOBAL_STATUS_PPU_MASK) ==
		    GLOBAL_STATUS_PPU_POLLING)
			return 0;
	}

	return -ETIMEDOUT;
}

static void mv88e6xxx_ppu_reenable_work(struct work_struct *ugly)
{
	struct mv88e6xxx_priv_state *ps;

	ps = container_of(ugly, struct mv88e6xxx_priv_state, ppu_work);
	if (mutex_trylock(&ps->ppu_mutex)) {
		struct dsa_switch *ds = ((struct dsa_switch *)ps) - 1;

		if (mv88e6xxx_ppu_enable(ds) == 0)
			ps->ppu_disabled = 0;
		mutex_unlock(&ps->ppu_mutex);
	}
}

static void mv88e6xxx_ppu_reenable_timer(unsigned long _ps)
{
	struct mv88e6xxx_priv_state *ps = (void *)_ps;

	schedule_work(&ps->ppu_work);
}

static int mv88e6xxx_ppu_access_get(struct dsa_switch *ds)
{
	struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);
	int ret;

	mutex_lock(&ps->ppu_mutex);

	/* If the PHY polling unit is enabled, disable it so that
	 * we can access the PHY registers.  If it was already
	 * disabled, cancel the timer that is going to re-enable
	 * it.
	 */
	if (!ps->ppu_disabled) {
		ret = mv88e6xxx_ppu_disable(ds);
		if (ret < 0) {
			mutex_unlock(&ps->ppu_mutex);
			return ret;
		}
		ps->ppu_disabled = 1;
	} else {
		del_timer(&ps->ppu_timer);
		ret = 0;
	}

	return ret;
}

static void mv88e6xxx_ppu_access_put(struct dsa_switch *ds)
{
	struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);

	/* Schedule a timer to re-enable the PHY polling unit. */
	mod_timer(&ps->ppu_timer, jiffies + msecs_to_jiffies(10));
	mutex_unlock(&ps->ppu_mutex);
}

void mv88e6xxx_ppu_state_init(struct dsa_switch *ds)
{
	struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);

	mutex_init(&ps->ppu_mutex);
	INIT_WORK(&ps->ppu_work, mv88e6xxx_ppu_reenable_work);
	init_timer(&ps->ppu_timer);
	ps->ppu_timer.data = (unsigned long)ps;
	ps->ppu_timer.function = mv88e6xxx_ppu_reenable_timer;
}

int mv88e6xxx_phy_read_ppu(struct dsa_switch *ds, int addr, int regnum)
{
	int ret;

	ret = mv88e6xxx_ppu_access_get(ds);
	if (ret >= 0) {
		ret = mv88e6xxx_reg_read(ds, addr, regnum);
		mv88e6xxx_ppu_access_put(ds);
	}

	return ret;
}

int mv88e6xxx_phy_write_ppu(struct dsa_switch *ds, int addr,
			    int regnum, u16 val)
{
	int ret;

	ret = mv88e6xxx_ppu_access_get(ds);
	if (ret >= 0) {
		ret = mv88e6xxx_reg_write(ds, addr, regnum, val);
		mv88e6xxx_ppu_access_put(ds);
	}

	return ret;
}
#endif

void mv88e6xxx_poll_link(struct dsa_switch *ds)
{
	int i;

	for (i = 0; i < DSA_MAX_PORTS; i++) {
		struct net_device *dev;
		int uninitialized_var(port_status);
		int link;
		int speed;
		int duplex;
		int fc;

		dev = ds->ports[i];
		if (dev == NULL)
			continue;

		link = 0;
		if (dev->flags & IFF_UP) {
			port_status = mv88e6xxx_reg_read(ds, REG_PORT(i),
							 PORT_STATUS);
			if (port_status < 0)
				continue;

			link = !!(port_status & PORT_STATUS_LINK);
		}

		if (!link) {
			if (netif_carrier_ok(dev)) {
				netdev_info(dev, "link down\n");
				netif_carrier_off(dev);
			}
			continue;
		}

		switch (port_status & PORT_STATUS_SPEED_MASK) {
		case PORT_STATUS_SPEED_10:
			speed = 10;
			break;
		case PORT_STATUS_SPEED_100:
			speed = 100;
			break;
		case PORT_STATUS_SPEED_1000:
			speed = 1000;
			break;
		default:
			speed = -1;
			break;
		}
		duplex = (port_status & PORT_STATUS_DUPLEX) ? 1 : 0;
		fc = (port_status & PORT_STATUS_PAUSE_EN) ? 1 : 0;

		if (!netif_carrier_ok(dev)) {
			netdev_info(dev,
				    "link up, %d Mb/s, %s duplex, flow control %sabled\n",
				    speed,
				    duplex ? "full" : "half",
				    fc ? "en" : "dis");
			netif_carrier_on(dev);
		}
	}
}

static bool mv88e6xxx_6352_family(struct dsa_switch *ds)
{
	struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);

	switch (ps->id) {
	case PORT_SWITCH_ID_6352:
	case PORT_SWITCH_ID_6172:
	case PORT_SWITCH_ID_6176:
		return true;
	}
	return false;
}

static int mv88e6xxx_stats_wait(struct dsa_switch *ds)
{
	int ret;
	int i;

	for (i = 0; i < 10; i++) {
		ret = REG_READ(REG_GLOBAL, GLOBAL_STATS_OP);
		if ((ret & GLOBAL_STATS_OP_BUSY) == 0)
			return 0;
	}

	return -ETIMEDOUT;
}

static int mv88e6xxx_stats_snapshot(struct dsa_switch *ds, int port)
{
	int ret;

	if (mv88e6xxx_6352_family(ds))
		port = (port + 1) << 5;

	/* Snapshot the hardware statistics counters for this port. */
	REG_WRITE(REG_GLOBAL, GLOBAL_STATS_OP,
		  GLOBAL_STATS_OP_CAPTURE_PORT |
		  GLOBAL_STATS_OP_HIST_RX_TX | port);

	/* Wait for the snapshotting to complete. */
	ret = mv88e6xxx_stats_wait(ds);
	if (ret < 0)
		return ret;

	return 0;
}

static void mv88e6xxx_stats_read(struct dsa_switch *ds, int stat, u32 *val)
{
	u32 _val;
	int ret;

	*val = 0;

	ret = mv88e6xxx_reg_write(ds, REG_GLOBAL, GLOBAL_STATS_OP,
				  GLOBAL_STATS_OP_READ_CAPTURED |
				  GLOBAL_STATS_OP_HIST_RX_TX | stat);
	if (ret < 0)
		return;

	ret = mv88e6xxx_stats_wait(ds);
	if (ret < 0)
		return;

	ret = mv88e6xxx_reg_read(ds, REG_GLOBAL, GLOBAL_STATS_COUNTER_32);
	if (ret < 0)
		return;

	_val = ret << 16;

	ret = mv88e6xxx_reg_read(ds, REG_GLOBAL, GLOBAL_STATS_COUNTER_01);
	if (ret < 0)
		return;

	*val = _val | ret;
}

static struct mv88e6xxx_hw_stat mv88e6xxx_hw_stats[] = {
	{ "in_good_octets", 8, 0x00, },
	{ "in_bad_octets", 4, 0x02, },
	{ "in_unicast", 4, 0x04, },
	{ "in_broadcasts", 4, 0x06, },
	{ "in_multicasts", 4, 0x07, },
	{ "in_pause", 4, 0x16, },
	{ "in_undersize", 4, 0x18, },
	{ "in_fragments", 4, 0x19, },
	{ "in_oversize", 4, 0x1a, },
	{ "in_jabber", 4, 0x1b, },
	{ "in_rx_error", 4, 0x1c, },
	{ "in_fcs_error", 4, 0x1d, },
	{ "out_octets", 8, 0x0e, },
	{ "out_unicast", 4, 0x10, },
	{ "out_broadcasts", 4, 0x13, },
	{ "out_multicasts", 4, 0x12, },
	{ "out_pause", 4, 0x15, },
	{ "excessive", 4, 0x11, },
	{ "collisions", 4, 0x1e, },
	{ "deferred", 4, 0x05, },
	{ "single", 4, 0x14, },
	{ "multiple", 4, 0x17, },
	{ "out_fcs_error", 4, 0x03, },
	{ "late", 4, 0x1f, },
	{ "hist_64bytes", 4, 0x08, },
	{ "hist_65_127bytes", 4, 0x09, },
	{ "hist_128_255bytes", 4, 0x0a, },
	{ "hist_256_511bytes", 4, 0x0b, },
	{ "hist_512_1023bytes", 4, 0x0c, },
	{ "hist_1024_max_bytes", 4, 0x0d, },
	/* Not all devices have the following counters */
	{ "sw_in_discards", 4, 0x110, },
	{ "sw_in_filtered", 2, 0x112, },
	{ "sw_out_filtered", 2, 0x113, },

};

static bool have_sw_in_discards(struct dsa_switch *ds)
{
	struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);

	switch (ps->id) {
	case PORT_SWITCH_ID_6095: case PORT_SWITCH_ID_6161:
	case PORT_SWITCH_ID_6165: case PORT_SWITCH_ID_6171:
	case PORT_SWITCH_ID_6172: case PORT_SWITCH_ID_6176:
	case PORT_SWITCH_ID_6182: case PORT_SWITCH_ID_6185:
	case PORT_SWITCH_ID_6352:
		return true;
	default:
		return false;
	}
}

static void _mv88e6xxx_get_strings(struct dsa_switch *ds,
				   int nr_stats,
				   struct mv88e6xxx_hw_stat *stats,
				   int port, uint8_t *data)
{
	int i;

	for (i = 0; i < nr_stats; i++) {
		memcpy(data + i * ETH_GSTRING_LEN,
		       stats[i].string, ETH_GSTRING_LEN);
	}
}

static void _mv88e6xxx_get_ethtool_stats(struct dsa_switch *ds,
					 int nr_stats,
					 struct mv88e6xxx_hw_stat *stats,
					 int port, uint64_t *data)
{
	struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);
	int ret;
	int i;

	mutex_lock(&ps->stats_mutex);

	ret = mv88e6xxx_stats_snapshot(ds, port);
	if (ret < 0) {
		mutex_unlock(&ps->stats_mutex);
		return;
	}

	/* Read each of the counters. */
	for (i = 0; i < nr_stats; i++) {
		struct mv88e6xxx_hw_stat *s = stats + i;
		u32 low;
		u32 high = 0;

		if (s->reg >= 0x100) {
			ret = mv88e6xxx_reg_read(ds, REG_PORT(port),
						 s->reg - 0x100);
			if (ret < 0)
				goto error;
			low = ret;
			if (s->sizeof_stat == 4) {
				ret = mv88e6xxx_reg_read(ds, REG_PORT(port),
							 s->reg - 0x100 + 1);
				if (ret < 0)
					goto error;
				high = ret;
			}
			data[i] = (((u64)high) << 16) | low;
			continue;
		}
		mv88e6xxx_stats_read(ds, s->reg, &low);
		if (s->sizeof_stat == 8)
			mv88e6xxx_stats_read(ds, s->reg + 1, &high);

		data[i] = (((u64)high) << 32) | low;
	}
error:
	mutex_unlock(&ps->stats_mutex);
}

/* All the statistics in the table */
void
mv88e6xxx_get_strings(struct dsa_switch *ds, int port, uint8_t *data)
{
	if (have_sw_in_discards(ds))
		_mv88e6xxx_get_strings(ds, ARRAY_SIZE(mv88e6xxx_hw_stats),
				       mv88e6xxx_hw_stats, port, data);
	else
		_mv88e6xxx_get_strings(ds, ARRAY_SIZE(mv88e6xxx_hw_stats) - 3,
				       mv88e6xxx_hw_stats, port, data);
}

int mv88e6xxx_get_sset_count(struct dsa_switch *ds)
{
	if (have_sw_in_discards(ds))
		return ARRAY_SIZE(mv88e6xxx_hw_stats);
	return ARRAY_SIZE(mv88e6xxx_hw_stats) - 3;
}

void
mv88e6xxx_get_ethtool_stats(struct dsa_switch *ds,
			    int port, uint64_t *data)
{
	if (have_sw_in_discards(ds))
		_mv88e6xxx_get_ethtool_stats(
			ds, ARRAY_SIZE(mv88e6xxx_hw_stats),
			mv88e6xxx_hw_stats, port, data);
	else
		_mv88e6xxx_get_ethtool_stats(
			ds, ARRAY_SIZE(mv88e6xxx_hw_stats) - 3,
			mv88e6xxx_hw_stats, port, data);
}

int mv88e6xxx_get_regs_len(struct dsa_switch *ds, int port)
{
	return 32 * sizeof(u16);
}

void mv88e6xxx_get_regs(struct dsa_switch *ds, int port,
			struct ethtool_regs *regs, void *_p)
{
	u16 *p = _p;
	int i;

	regs->version = 0;

	memset(p, 0xff, 32 * sizeof(u16));

	for (i = 0; i < 32; i++) {
		int ret;

		ret = mv88e6xxx_reg_read(ds, REG_PORT(port), i);
		if (ret >= 0)
			p[i] = ret;
	}
}

#ifdef CONFIG_NET_DSA_HWMON

int  mv88e6xxx_get_temp(struct dsa_switch *ds, int *temp)
{
	struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);
	int ret;
	int val;

	*temp = 0;

	mutex_lock(&ps->phy_mutex);

	ret = _mv88e6xxx_phy_write(ds, 0x0, 0x16, 0x6);
	if (ret < 0)
		goto error;

	/* Enable temperature sensor */
	ret = _mv88e6xxx_phy_read(ds, 0x0, 0x1a);
	if (ret < 0)
		goto error;

	ret = _mv88e6xxx_phy_write(ds, 0x0, 0x1a, ret | (1 << 5));
	if (ret < 0)
		goto error;

	/* Wait for temperature to stabilize */
	usleep_range(10000, 12000);

	val = _mv88e6xxx_phy_read(ds, 0x0, 0x1a);
	if (val < 0) {
		ret = val;
		goto error;
	}

	/* Disable temperature sensor */
	ret = _mv88e6xxx_phy_write(ds, 0x0, 0x1a, ret & ~(1 << 5));
	if (ret < 0)
		goto error;

	*temp = ((val & 0x1f) - 5) * 5;

error:
	_mv88e6xxx_phy_write(ds, 0x0, 0x16, 0x0);
	mutex_unlock(&ps->phy_mutex);
	return ret;
}
#endif /* CONFIG_NET_DSA_HWMON */

static int mv88e6xxx_wait(struct dsa_switch *ds, int reg, int offset, u16 mask)
{
	unsigned long timeout = jiffies + HZ / 10;

	while (time_before(jiffies, timeout)) {
		int ret;

		ret = REG_READ(reg, offset);
		if (!(ret & mask))
			return 0;

		usleep_range(1000, 2000);
	}
	return -ETIMEDOUT;
}

int mv88e6xxx_phy_wait(struct dsa_switch *ds)
{
	return mv88e6xxx_wait(ds, REG_GLOBAL2, GLOBAL2_SMI_OP,
			      GLOBAL2_SMI_OP_BUSY);
}

int mv88e6xxx_eeprom_load_wait(struct dsa_switch *ds)
{
	return mv88e6xxx_wait(ds, REG_GLOBAL2, GLOBAL2_EEPROM_OP,
			      GLOBAL2_EEPROM_OP_LOAD);
}

int mv88e6xxx_eeprom_busy_wait(struct dsa_switch *ds)
{
	return mv88e6xxx_wait(ds, REG_GLOBAL2, GLOBAL2_EEPROM_OP,
			      GLOBAL2_EEPROM_OP_BUSY);
}

/* Must be called with SMI lock held */
static int _mv88e6xxx_wait(struct dsa_switch *ds, int reg, int offset, u16 mask)
{
	unsigned long timeout = jiffies + HZ / 10;

	while (time_before(jiffies, timeout)) {
		int ret;

		ret = _mv88e6xxx_reg_read(ds, reg, offset);
		if (ret < 0)
			return ret;
		if (!(ret & mask))
			return 0;

		usleep_range(1000, 2000);
	}
	return -ETIMEDOUT;
}

/* Must be called with SMI lock held */
static int _mv88e6xxx_atu_wait(struct dsa_switch *ds)
{
	return _mv88e6xxx_wait(ds, REG_GLOBAL, GLOBAL_ATU_OP,
			       GLOBAL_ATU_OP_BUSY);
}

/* Must be called with phy mutex held */
static int _mv88e6xxx_phy_read_indirect(struct dsa_switch *ds, int addr,
					int regnum)
{
	int ret;

	REG_WRITE(REG_GLOBAL2, GLOBAL2_SMI_OP,
		  GLOBAL2_SMI_OP_22_READ | (addr << 5) | regnum);

	ret = mv88e6xxx_phy_wait(ds);
	if (ret < 0)
		return ret;

	return REG_READ(REG_GLOBAL2, GLOBAL2_SMI_DATA);
}

/* Must be called with phy mutex held */
static int _mv88e6xxx_phy_write_indirect(struct dsa_switch *ds, int addr,
					 int regnum, u16 val)
{
	REG_WRITE(REG_GLOBAL2, GLOBAL2_SMI_DATA, val);
	REG_WRITE(REG_GLOBAL2, GLOBAL2_SMI_OP,
		  GLOBAL2_SMI_OP_22_WRITE | (addr << 5) | regnum);

	return mv88e6xxx_phy_wait(ds);
}

int mv88e6xxx_get_eee(struct dsa_switch *ds, int port, struct ethtool_eee *e)
{
	struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);
	int reg;

	mutex_lock(&ps->phy_mutex);

	reg = _mv88e6xxx_phy_read_indirect(ds, port, 16);
	if (reg < 0)
		goto out;

	e->eee_enabled = !!(reg & 0x0200);
	e->tx_lpi_enabled = !!(reg & 0x0100);

	reg = mv88e6xxx_reg_read(ds, REG_PORT(port), PORT_STATUS);
	if (reg < 0)
		goto out;

	e->eee_active = !!(reg & PORT_STATUS_EEE);
	reg = 0;

out:
	mutex_unlock(&ps->phy_mutex);
	return reg;
}

int mv88e6xxx_set_eee(struct dsa_switch *ds, int port,
		      struct phy_device *phydev, struct ethtool_eee *e)
{
	struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);
	int reg;
	int ret;

	mutex_lock(&ps->phy_mutex);

	ret = _mv88e6xxx_phy_read_indirect(ds, port, 16);
	if (ret < 0)
		goto out;

	reg = ret & ~0x0300;
	if (e->eee_enabled)
		reg |= 0x0200;
	if (e->tx_lpi_enabled)
		reg |= 0x0100;

	ret = _mv88e6xxx_phy_write_indirect(ds, port, 16, reg);
out:
	mutex_unlock(&ps->phy_mutex);

	return ret;
}

static int _mv88e6xxx_atu_cmd(struct dsa_switch *ds, int fid, u16 cmd)
{
	int ret;

	ret = _mv88e6xxx_reg_write(ds, REG_GLOBAL, 0x01, fid);
	if (ret < 0)
		return ret;

	ret = _mv88e6xxx_reg_write(ds, REG_GLOBAL, GLOBAL_ATU_OP, cmd);
	if (ret < 0)
		return ret;

	return _mv88e6xxx_atu_wait(ds);
}

static int _mv88e6xxx_flush_fid(struct dsa_switch *ds, int fid)
{
	int ret;

	ret = _mv88e6xxx_atu_wait(ds);
	if (ret < 0)
		return ret;

	return _mv88e6xxx_atu_cmd(ds, fid, GLOBAL_ATU_OP_FLUSH_NON_STATIC_DB);
}

static int mv88e6xxx_set_port_state(struct dsa_switch *ds, int port, u8 state)
{
	struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);
	int reg, ret = 0;
	u8 oldstate;

	mutex_lock(&ps->smi_mutex);

	reg = _mv88e6xxx_reg_read(ds, REG_PORT(port), PORT_CONTROL);
	if (reg < 0) {
		ret = reg;
		goto abort;
	}

	oldstate = reg & PORT_CONTROL_STATE_MASK;
	if (oldstate != state) {
		/* Flush forwarding database if we're moving a port
		 * from Learning or Forwarding state to Disabled or
		 * Blocking or Listening state.
		 */
		if (oldstate >= PORT_CONTROL_STATE_LEARNING &&
		    state <= PORT_CONTROL_STATE_BLOCKING) {
			ret = _mv88e6xxx_flush_fid(ds, ps->fid[port]);
			if (ret)
				goto abort;
		}
		reg = (reg & ~PORT_CONTROL_STATE_MASK) | state;
		ret = _mv88e6xxx_reg_write(ds, REG_PORT(port), PORT_CONTROL,
					   reg);
	}

abort:
	mutex_unlock(&ps->smi_mutex);
	return ret;
}

/* Must be called with smi lock held */
static int _mv88e6xxx_update_port_config(struct dsa_switch *ds, int port)
{
	struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);
	u8 fid = ps->fid[port];
	u16 reg = fid << 12;

	if (dsa_is_cpu_port(ds, port))
		reg |= ds->phys_port_mask;
	else
		reg |= (ps->bridge_mask[fid] |
		       (1 << dsa_upstream_port(ds))) & ~(1 << port);

	return _mv88e6xxx_reg_write(ds, REG_PORT(port), PORT_BASE_VLAN, reg);
}

/* Must be called with smi lock held */
static int _mv88e6xxx_update_bridge_config(struct dsa_switch *ds, int fid)
{
	struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);
	int port;
	u32 mask;
	int ret;

	mask = ds->phys_port_mask;
	while (mask) {
		port = __ffs(mask);
		mask &= ~(1 << port);
		if (ps->fid[port] != fid)
			continue;

		ret = _mv88e6xxx_update_port_config(ds, port);
		if (ret)
			return ret;
	}

	return _mv88e6xxx_flush_fid(ds, fid);
}

/* Bridge handling functions */

int mv88e6xxx_join_bridge(struct dsa_switch *ds, int port, u32 br_port_mask)
{
	struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);
	int ret = 0;
	u32 nmask;
	int fid;

	/* If the bridge group is not empty, join that group.
	 * Otherwise create a new group.
	 */
	fid = ps->fid[port];
	nmask = br_port_mask & ~(1 << port);
	if (nmask)
		fid = ps->fid[__ffs(nmask)];

	nmask = ps->bridge_mask[fid] | (1 << port);
	if (nmask != br_port_mask) {
		netdev_err(ds->ports[port],
			   "join: Bridge port mask mismatch fid=%d mask=0x%x expected 0x%x\n",
			   fid, br_port_mask, nmask);
		return -EINVAL;
	}

	mutex_lock(&ps->smi_mutex);

	ps->bridge_mask[fid] = br_port_mask;

	if (fid != ps->fid[port]) {
		ps->fid_mask |= 1 << ps->fid[port];
		ps->fid[port] = fid;
		ret = _mv88e6xxx_update_bridge_config(ds, fid);
	}

	mutex_unlock(&ps->smi_mutex);

	return ret;
}

int mv88e6xxx_leave_bridge(struct dsa_switch *ds, int port, u32 br_port_mask)
{
	struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);
	u8 fid, newfid;
	int ret;

	fid = ps->fid[port];

	if (ps->bridge_mask[fid] != br_port_mask) {
		netdev_err(ds->ports[port],
			   "leave: Bridge port mask mismatch fid=%d mask=0x%x expected 0x%x\n",
			   fid, br_port_mask, ps->bridge_mask[fid]);
		return -EINVAL;
	}

	/* If the port was the last port of a bridge, we are done.
	 * Otherwise assign a new fid to the port, and fix up
	 * the bridge configuration.
	 */
	if (br_port_mask == (1 << port))
		return 0;

	mutex_lock(&ps->smi_mutex);

	newfid = __ffs(ps->fid_mask);
	ps->fid[port] = newfid;
	ps->fid_mask &= (1 << newfid);
	ps->bridge_mask[fid] &= ~(1 << port);
	ps->bridge_mask[newfid] = 1 << port;

	ret = _mv88e6xxx_update_bridge_config(ds, fid);
	if (!ret)
		ret = _mv88e6xxx_update_bridge_config(ds, newfid);

	mutex_unlock(&ps->smi_mutex);

	return ret;
}

int mv88e6xxx_port_stp_update(struct dsa_switch *ds, int port, u8 state)
{
	struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);
	int stp_state;

	switch (state) {
	case BR_STATE_DISABLED:
		stp_state = PORT_CONTROL_STATE_DISABLED;
		break;
	case BR_STATE_BLOCKING:
	case BR_STATE_LISTENING:
		stp_state = PORT_CONTROL_STATE_BLOCKING;
		break;
	case BR_STATE_LEARNING:
		stp_state = PORT_CONTROL_STATE_LEARNING;
		break;
	case BR_STATE_FORWARDING:
	default:
		stp_state = PORT_CONTROL_STATE_FORWARDING;
		break;
	}

	netdev_dbg(ds->ports[port], "port state %d [%d]\n", state, stp_state);

	/* mv88e6xxx_port_stp_update may be called with softirqs disabled,
	 * so we can not update the port state directly but need to schedule it.
	 */
	ps->port_state[port] = stp_state;
	set_bit(port, &ps->port_state_update_mask);
	schedule_work(&ps->bridge_work);

	return 0;
}

static int __mv88e6xxx_write_addr(struct dsa_switch *ds,
				  const unsigned char *addr)
{
	int i, ret;

	for (i = 0; i < 3; i++) {
		ret = _mv88e6xxx_reg_write(
			ds, REG_GLOBAL, GLOBAL_ATU_MAC_01 + i,
			(addr[i * 2] << 8) | addr[i * 2 + 1]);
		if (ret < 0)
			return ret;
	}

	return 0;
}

static int __mv88e6xxx_read_addr(struct dsa_switch *ds, unsigned char *addr)
{
	int i, ret;

	for (i = 0; i < 3; i++) {
		ret = _mv88e6xxx_reg_read(ds, REG_GLOBAL,
					  GLOBAL_ATU_MAC_01 + i);
		if (ret < 0)
			return ret;
		addr[i * 2] = ret >> 8;
		addr[i * 2 + 1] = ret & 0xff;
	}

	return 0;
}

static int __mv88e6xxx_port_fdb_cmd(struct dsa_switch *ds, int port,
				    const unsigned char *addr, int state)
{
	struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);
	u8 fid = ps->fid[port];
	int ret;

	ret = _mv88e6xxx_atu_wait(ds);
	if (ret < 0)
		return ret;

	ret = __mv88e6xxx_write_addr(ds, addr);
	if (ret < 0)
		return ret;

	ret = _mv88e6xxx_reg_write(ds, REG_GLOBAL, GLOBAL_ATU_DATA,
				   (0x10 << port) | state);
	if (ret)
		return ret;

	ret = _mv88e6xxx_atu_cmd(ds, fid, GLOBAL_ATU_OP_LOAD_DB);

	return ret;
}

int mv88e6xxx_port_fdb_add(struct dsa_switch *ds, int port,
			   const unsigned char *addr, u16 vid)
{
	int state = is_multicast_ether_addr(addr) ?
		GLOBAL_ATU_DATA_STATE_MC_STATIC :
		GLOBAL_ATU_DATA_STATE_UC_STATIC;
	struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);
	int ret;

	mutex_lock(&ps->smi_mutex);
	ret = __mv88e6xxx_port_fdb_cmd(ds, port, addr, state);
	mutex_unlock(&ps->smi_mutex);

	return ret;
}

int mv88e6xxx_port_fdb_del(struct dsa_switch *ds, int port,
			   const unsigned char *addr, u16 vid)
{
	struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);
	int ret;

	mutex_lock(&ps->smi_mutex);
	ret = __mv88e6xxx_port_fdb_cmd(ds, port, addr,
				       GLOBAL_ATU_DATA_STATE_UNUSED);
	mutex_unlock(&ps->smi_mutex);

	return ret;
}

static int __mv88e6xxx_port_getnext(struct dsa_switch *ds, int port,
				    unsigned char *addr, bool *is_static)
{
	struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);
	u8 fid = ps->fid[port];
	int ret, state;

	ret = _mv88e6xxx_atu_wait(ds);
	if (ret < 0)
		return ret;

	ret = __mv88e6xxx_write_addr(ds, addr);
	if (ret < 0)
		return ret;

	do {
		ret = _mv88e6xxx_atu_cmd(ds, fid,  GLOBAL_ATU_OP_GET_NEXT_DB);
		if (ret < 0)
			return ret;

		ret = _mv88e6xxx_reg_read(ds, REG_GLOBAL, GLOBAL_ATU_DATA);
		if (ret < 0)
			return ret;
		state = ret & GLOBAL_ATU_DATA_STATE_MASK;
		if (state == GLOBAL_ATU_DATA_STATE_UNUSED)
			return -ENOENT;
	} while (!(((ret >> 4) & 0xff) & (1 << port)));

	ret = __mv88e6xxx_read_addr(ds, addr);
	if (ret < 0)
		return ret;

	*is_static = state == (is_multicast_ether_addr(addr) ?
			       GLOBAL_ATU_DATA_STATE_MC_STATIC :
			       GLOBAL_ATU_DATA_STATE_UC_STATIC);

	return 0;
}

/* get next entry for port */
int mv88e6xxx_port_fdb_getnext(struct dsa_switch *ds, int port,
			       unsigned char *addr, bool *is_static)
{
	struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);
	int ret;

	mutex_lock(&ps->smi_mutex);
	ret = __mv88e6xxx_port_getnext(ds, port, addr, is_static);
	mutex_unlock(&ps->smi_mutex);

	return ret;
}

static void mv88e6xxx_bridge_work(struct work_struct *work)
{
	struct mv88e6xxx_priv_state *ps;
	struct dsa_switch *ds;
	int port;

	ps = container_of(work, struct mv88e6xxx_priv_state, bridge_work);
	ds = ((struct dsa_switch *)ps) - 1;

	while (ps->port_state_update_mask) {
		port = __ffs(ps->port_state_update_mask);
		clear_bit(port, &ps->port_state_update_mask);
		mv88e6xxx_set_port_state(ds, port, ps->port_state[port]);
	}
}

int mv88e6xxx_setup_port_common(struct dsa_switch *ds, int port)
{
	struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);
	int ret, fid;

	mutex_lock(&ps->smi_mutex);

	/* Port Control 1: disable trunking, disable sending
	 * learning messages to this port.
	 */
	ret = _mv88e6xxx_reg_write(ds, REG_PORT(port), PORT_DEFAULT_VLAN,
				   0x0000);
	if (ret)
		goto abort;

	/* Port based VLAN map: give each port its own address
	 * database, allow the CPU port to talk to each of the 'real'
	 * ports, and allow each of the 'real' ports to only talk to
	 * the upstream port.
	 */
	fid = __ffs(ps->fid_mask);
	ps->fid[port] = fid;
	ps->fid_mask &= ~(1 << fid);

	if (!dsa_is_cpu_port(ds, port))
		ps->bridge_mask[fid] = 1 << port;

	ret = _mv88e6xxx_update_port_config(ds, port);
	if (ret)
		goto abort;

	/* Default VLAN ID and priority: don't set a default VLAN
	 * ID, and set the default packet priority to zero.
	 */
	ret = _mv88e6xxx_reg_write(ds, REG_PORT(port), 0x07, 0x0000);
abort:
	mutex_unlock(&ps->smi_mutex);
	return ret;
}

int mv88e6xxx_setup_common(struct dsa_switch *ds)
{
	struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);

	mutex_init(&ps->smi_mutex);
	mutex_init(&ps->stats_mutex);
	mutex_init(&ps->phy_mutex);

	ps->id = REG_READ(REG_PORT(0), PORT_SWITCH_ID) & 0xfff0;

	ps->fid_mask = (1 << DSA_MAX_PORTS) - 1;

	INIT_WORK(&ps->bridge_work, mv88e6xxx_bridge_work);

	return 0;
}

int mv88e6xxx_switch_reset(struct dsa_switch *ds, bool ppu_active)
{
	struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);
	u16 is_reset = (ppu_active ? 0x8800 : 0xc800);
	unsigned long timeout;
	int ret;
	int i;

	/* Set all ports to the disabled state. */
	for (i = 0; i < ps->num_ports; i++) {
		ret = REG_READ(REG_PORT(i), PORT_CONTROL);
		REG_WRITE(REG_PORT(i), PORT_CONTROL, ret & 0xfffc);
	}

	/* Wait for transmit queues to drain. */
	usleep_range(2000, 4000);

	/* Reset the switch. Keep the PPU active if requested. The PPU
	 * needs to be active to support indirect phy register access
	 * through global registers 0x18 and 0x19.
	 */
	if (ppu_active)
		REG_WRITE(REG_GLOBAL, 0x04, 0xc000);
	else
		REG_WRITE(REG_GLOBAL, 0x04, 0xc400);

	/* Wait up to one second for reset to complete. */
	timeout = jiffies + 1 * HZ;
	while (time_before(jiffies, timeout)) {
		ret = REG_READ(REG_GLOBAL, 0x00);
		if ((ret & is_reset) == is_reset)
			break;
		usleep_range(1000, 2000);
	}
	if (time_after(jiffies, timeout))
		return -ETIMEDOUT;

	return 0;
}

int mv88e6xxx_phy_page_read(struct dsa_switch *ds, int port, int page, int reg)
{
	struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);
	int ret;

	mutex_lock(&ps->phy_mutex);
	ret = _mv88e6xxx_phy_write_indirect(ds, port, 0x16, page);
	if (ret < 0)
		goto error;
	ret = _mv88e6xxx_phy_read_indirect(ds, port, reg);
error:
	_mv88e6xxx_phy_write_indirect(ds, port, 0x16, 0x0);
	mutex_unlock(&ps->phy_mutex);
	return ret;
}

int mv88e6xxx_phy_page_write(struct dsa_switch *ds, int port, int page,
			     int reg, int val)
{
	struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);
	int ret;

	mutex_lock(&ps->phy_mutex);
	ret = _mv88e6xxx_phy_write_indirect(ds, port, 0x16, page);
	if (ret < 0)
		goto error;

	ret = _mv88e6xxx_phy_write_indirect(ds, port, reg, val);
error:
	_mv88e6xxx_phy_write_indirect(ds, port, 0x16, 0x0);
	mutex_unlock(&ps->phy_mutex);
	return ret;
}

static int mv88e6xxx_port_to_phy_addr(struct dsa_switch *ds, int port)
{
	struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);

	if (port >= 0 && port < ps->num_ports)
		return port;
	return -EINVAL;
}

int
mv88e6xxx_phy_read(struct dsa_switch *ds, int port, int regnum)
{
	struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);
	int addr = mv88e6xxx_port_to_phy_addr(ds, port);
	int ret;

	if (addr < 0)
		return addr;

	mutex_lock(&ps->phy_mutex);
	ret = _mv88e6xxx_phy_read(ds, addr, regnum);
	mutex_unlock(&ps->phy_mutex);
	return ret;
}

int
mv88e6xxx_phy_write(struct dsa_switch *ds, int port, int regnum, u16 val)
{
	struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);
	int addr = mv88e6xxx_port_to_phy_addr(ds, port);
	int ret;

	if (addr < 0)
		return addr;

	mutex_lock(&ps->phy_mutex);
	ret = _mv88e6xxx_phy_write(ds, addr, regnum, val);
	mutex_unlock(&ps->phy_mutex);
	return ret;
}

int
mv88e6xxx_phy_read_indirect(struct dsa_switch *ds, int port, int regnum)
{
	struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);
	int addr = mv88e6xxx_port_to_phy_addr(ds, port);
	int ret;

	if (addr < 0)
		return addr;

	mutex_lock(&ps->phy_mutex);
	ret = _mv88e6xxx_phy_read_indirect(ds, addr, regnum);
	mutex_unlock(&ps->phy_mutex);
	return ret;
}

int
mv88e6xxx_phy_write_indirect(struct dsa_switch *ds, int port, int regnum,
			     u16 val)
{
	struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);
	int addr = mv88e6xxx_port_to_phy_addr(ds, port);
	int ret;

	if (addr < 0)
		return addr;

	mutex_lock(&ps->phy_mutex);
	ret = _mv88e6xxx_phy_write_indirect(ds, addr, regnum, val);
	mutex_unlock(&ps->phy_mutex);
	return ret;
}

static int __init mv88e6xxx_init(void)
{
#if IS_ENABLED(CONFIG_NET_DSA_MV88E6131)
	register_switch_driver(&mv88e6131_switch_driver);
#endif
#if IS_ENABLED(CONFIG_NET_DSA_MV88E6123_61_65)
	register_switch_driver(&mv88e6123_61_65_switch_driver);
#endif
#if IS_ENABLED(CONFIG_NET_DSA_MV88E6352)
	register_switch_driver(&mv88e6352_switch_driver);
#endif
#if IS_ENABLED(CONFIG_NET_DSA_MV88E6171)
	register_switch_driver(&mv88e6171_switch_driver);
#endif
	return 0;
}
module_init(mv88e6xxx_init);

static void __exit mv88e6xxx_cleanup(void)
{
#if IS_ENABLED(CONFIG_NET_DSA_MV88E6171)
	unregister_switch_driver(&mv88e6171_switch_driver);
#endif
#if IS_ENABLED(CONFIG_NET_DSA_MV88E6123_61_65)
	unregister_switch_driver(&mv88e6123_61_65_switch_driver);
#endif
#if IS_ENABLED(CONFIG_NET_DSA_MV88E6131)
	unregister_switch_driver(&mv88e6131_switch_driver);
#endif
}
module_exit(mv88e6xxx_cleanup);

MODULE_AUTHOR("Lennert Buytenhek <buytenh@wantstofly.org>");
MODULE_DESCRIPTION("Driver for Marvell 88E6XXX ethernet switch chips");
MODULE_LICENSE("GPL");