summaryrefslogtreecommitdiffstats
path: root/drivers/net/dsa/microchip/ksz9477.c
blob: 854e25f43fa708157cf4785ca1c170763b96c0ee (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
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
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
// SPDX-License-Identifier: GPL-2.0
/*
 * Microchip KSZ9477 switch driver main logic
 *
 * Copyright (C) 2017-2019 Microchip Technology Inc.
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/iopoll.h>
#include <linux/platform_data/microchip-ksz.h>
#include <linux/phy.h>
#include <linux/if_bridge.h>
#include <net/dsa.h>
#include <net/switchdev.h>

#include "ksz9477_reg.h"
#include "ksz_common.h"

/* Used with variable features to indicate capabilities. */
#define GBIT_SUPPORT			BIT(0)
#define NEW_XMII			BIT(1)
#define IS_9893				BIT(2)

static const struct {
	int index;
	char string[ETH_GSTRING_LEN];
} ksz9477_mib_names[TOTAL_SWITCH_COUNTER_NUM] = {
	{ 0x00, "rx_hi" },
	{ 0x01, "rx_undersize" },
	{ 0x02, "rx_fragments" },
	{ 0x03, "rx_oversize" },
	{ 0x04, "rx_jabbers" },
	{ 0x05, "rx_symbol_err" },
	{ 0x06, "rx_crc_err" },
	{ 0x07, "rx_align_err" },
	{ 0x08, "rx_mac_ctrl" },
	{ 0x09, "rx_pause" },
	{ 0x0A, "rx_bcast" },
	{ 0x0B, "rx_mcast" },
	{ 0x0C, "rx_ucast" },
	{ 0x0D, "rx_64_or_less" },
	{ 0x0E, "rx_65_127" },
	{ 0x0F, "rx_128_255" },
	{ 0x10, "rx_256_511" },
	{ 0x11, "rx_512_1023" },
	{ 0x12, "rx_1024_1522" },
	{ 0x13, "rx_1523_2000" },
	{ 0x14, "rx_2001" },
	{ 0x15, "tx_hi" },
	{ 0x16, "tx_late_col" },
	{ 0x17, "tx_pause" },
	{ 0x18, "tx_bcast" },
	{ 0x19, "tx_mcast" },
	{ 0x1A, "tx_ucast" },
	{ 0x1B, "tx_deferred" },
	{ 0x1C, "tx_total_col" },
	{ 0x1D, "tx_exc_col" },
	{ 0x1E, "tx_single_col" },
	{ 0x1F, "tx_mult_col" },
	{ 0x80, "rx_total" },
	{ 0x81, "tx_total" },
	{ 0x82, "rx_discards" },
	{ 0x83, "tx_discards" },
};

static void ksz_cfg(struct ksz_device *dev, u32 addr, u8 bits, bool set)
{
	regmap_update_bits(dev->regmap[0], addr, bits, set ? bits : 0);
}

static void ksz_port_cfg(struct ksz_device *dev, int port, int offset, u8 bits,
			 bool set)
{
	regmap_update_bits(dev->regmap[0], PORT_CTRL_ADDR(port, offset),
			   bits, set ? bits : 0);
}

static void ksz9477_cfg32(struct ksz_device *dev, u32 addr, u32 bits, bool set)
{
	regmap_update_bits(dev->regmap[2], addr, bits, set ? bits : 0);
}

static void ksz9477_port_cfg32(struct ksz_device *dev, int port, int offset,
			       u32 bits, bool set)
{
	regmap_update_bits(dev->regmap[2], PORT_CTRL_ADDR(port, offset),
			   bits, set ? bits : 0);
}

static int ksz9477_wait_vlan_ctrl_ready(struct ksz_device *dev)
{
	unsigned int val;

	return regmap_read_poll_timeout(dev->regmap[0], REG_SW_VLAN_CTRL,
					val, !(val & VLAN_START), 10, 1000);
}

static int ksz9477_get_vlan_table(struct ksz_device *dev, u16 vid,
				  u32 *vlan_table)
{
	int ret;

	mutex_lock(&dev->vlan_mutex);

	ksz_write16(dev, REG_SW_VLAN_ENTRY_INDEX__2, vid & VLAN_INDEX_M);
	ksz_write8(dev, REG_SW_VLAN_CTRL, VLAN_READ | VLAN_START);

	/* wait to be cleared */
	ret = ksz9477_wait_vlan_ctrl_ready(dev);
	if (ret) {
		dev_dbg(dev->dev, "Failed to read vlan table\n");
		goto exit;
	}

	ksz_read32(dev, REG_SW_VLAN_ENTRY__4, &vlan_table[0]);
	ksz_read32(dev, REG_SW_VLAN_ENTRY_UNTAG__4, &vlan_table[1]);
	ksz_read32(dev, REG_SW_VLAN_ENTRY_PORTS__4, &vlan_table[2]);

	ksz_write8(dev, REG_SW_VLAN_CTRL, 0);

exit:
	mutex_unlock(&dev->vlan_mutex);

	return ret;
}

static int ksz9477_set_vlan_table(struct ksz_device *dev, u16 vid,
				  u32 *vlan_table)
{
	int ret;

	mutex_lock(&dev->vlan_mutex);

	ksz_write32(dev, REG_SW_VLAN_ENTRY__4, vlan_table[0]);
	ksz_write32(dev, REG_SW_VLAN_ENTRY_UNTAG__4, vlan_table[1]);
	ksz_write32(dev, REG_SW_VLAN_ENTRY_PORTS__4, vlan_table[2]);

	ksz_write16(dev, REG_SW_VLAN_ENTRY_INDEX__2, vid & VLAN_INDEX_M);
	ksz_write8(dev, REG_SW_VLAN_CTRL, VLAN_START | VLAN_WRITE);

	/* wait to be cleared */
	ret = ksz9477_wait_vlan_ctrl_ready(dev);
	if (ret) {
		dev_dbg(dev->dev, "Failed to write vlan table\n");
		goto exit;
	}

	ksz_write8(dev, REG_SW_VLAN_CTRL, 0);

	/* update vlan cache table */
	dev->vlan_cache[vid].table[0] = vlan_table[0];
	dev->vlan_cache[vid].table[1] = vlan_table[1];
	dev->vlan_cache[vid].table[2] = vlan_table[2];

exit:
	mutex_unlock(&dev->vlan_mutex);

	return ret;
}

static void ksz9477_read_table(struct ksz_device *dev, u32 *table)
{
	ksz_read32(dev, REG_SW_ALU_VAL_A, &table[0]);
	ksz_read32(dev, REG_SW_ALU_VAL_B, &table[1]);
	ksz_read32(dev, REG_SW_ALU_VAL_C, &table[2]);
	ksz_read32(dev, REG_SW_ALU_VAL_D, &table[3]);
}

static void ksz9477_write_table(struct ksz_device *dev, u32 *table)
{
	ksz_write32(dev, REG_SW_ALU_VAL_A, table[0]);
	ksz_write32(dev, REG_SW_ALU_VAL_B, table[1]);
	ksz_write32(dev, REG_SW_ALU_VAL_C, table[2]);
	ksz_write32(dev, REG_SW_ALU_VAL_D, table[3]);
}

static int ksz9477_wait_alu_ready(struct ksz_device *dev)
{
	unsigned int val;

	return regmap_read_poll_timeout(dev->regmap[2], REG_SW_ALU_CTRL__4,
					val, !(val & ALU_START), 10, 1000);
}

static int ksz9477_wait_alu_sta_ready(struct ksz_device *dev)
{
	unsigned int val;

	return regmap_read_poll_timeout(dev->regmap[2],
					REG_SW_ALU_STAT_CTRL__4,
					val, !(val & ALU_STAT_START),
					10, 1000);
}

static int ksz9477_reset_switch(struct ksz_device *dev)
{
	u8 data8;
	u32 data32;

	/* reset switch */
	ksz_cfg(dev, REG_SW_OPERATION, SW_RESET, true);

	/* turn off SPI DO Edge select */
	regmap_update_bits(dev->regmap[0], REG_SW_GLOBAL_SERIAL_CTRL_0,
			   SPI_AUTO_EDGE_DETECTION, 0);

	/* default configuration */
	ksz_read8(dev, REG_SW_LUE_CTRL_1, &data8);
	data8 = SW_AGING_ENABLE | SW_LINK_AUTO_AGING |
	      SW_SRC_ADDR_FILTER | SW_FLUSH_STP_TABLE | SW_FLUSH_MSTP_TABLE;
	ksz_write8(dev, REG_SW_LUE_CTRL_1, data8);

	/* disable interrupts */
	ksz_write32(dev, REG_SW_INT_MASK__4, SWITCH_INT_MASK);
	ksz_write32(dev, REG_SW_PORT_INT_MASK__4, 0x7F);
	ksz_read32(dev, REG_SW_PORT_INT_STATUS__4, &data32);

	/* set broadcast storm protection 10% rate */
	regmap_update_bits(dev->regmap[1], REG_SW_MAC_CTRL_2,
			   BROADCAST_STORM_RATE,
			   (BROADCAST_STORM_VALUE *
			   BROADCAST_STORM_PROT_RATE) / 100);

	if (dev->synclko_125)
		ksz_write8(dev, REG_SW_GLOBAL_OUTPUT_CTRL__1,
			   SW_ENABLE_REFCLKO | SW_REFCLKO_IS_125MHZ);

	return 0;
}

static void ksz9477_r_mib_cnt(struct ksz_device *dev, int port, u16 addr,
			      u64 *cnt)
{
	struct ksz_port *p = &dev->ports[port];
	unsigned int val;
	u32 data;
	int ret;

	/* retain the flush/freeze bit */
	data = p->freeze ? MIB_COUNTER_FLUSH_FREEZE : 0;
	data |= MIB_COUNTER_READ;
	data |= (addr << MIB_COUNTER_INDEX_S);
	ksz_pwrite32(dev, port, REG_PORT_MIB_CTRL_STAT__4, data);

	ret = regmap_read_poll_timeout(dev->regmap[2],
			PORT_CTRL_ADDR(port, REG_PORT_MIB_CTRL_STAT__4),
			val, !(val & MIB_COUNTER_READ), 10, 1000);
	/* failed to read MIB. get out of loop */
	if (ret) {
		dev_dbg(dev->dev, "Failed to get MIB\n");
		return;
	}

	/* count resets upon read */
	ksz_pread32(dev, port, REG_PORT_MIB_DATA, &data);
	*cnt += data;
}

static void ksz9477_r_mib_pkt(struct ksz_device *dev, int port, u16 addr,
			      u64 *dropped, u64 *cnt)
{
	addr = ksz9477_mib_names[addr].index;
	ksz9477_r_mib_cnt(dev, port, addr, cnt);
}

static void ksz9477_freeze_mib(struct ksz_device *dev, int port, bool freeze)
{
	u32 val = freeze ? MIB_COUNTER_FLUSH_FREEZE : 0;
	struct ksz_port *p = &dev->ports[port];

	/* enable/disable the port for flush/freeze function */
	mutex_lock(&p->mib.cnt_mutex);
	ksz_pwrite32(dev, port, REG_PORT_MIB_CTRL_STAT__4, val);

	/* used by MIB counter reading code to know freeze is enabled */
	p->freeze = freeze;
	mutex_unlock(&p->mib.cnt_mutex);
}

static void ksz9477_port_init_cnt(struct ksz_device *dev, int port)
{
	struct ksz_port_mib *mib = &dev->ports[port].mib;

	/* flush all enabled port MIB counters */
	mutex_lock(&mib->cnt_mutex);
	ksz_pwrite32(dev, port, REG_PORT_MIB_CTRL_STAT__4,
		     MIB_COUNTER_FLUSH_FREEZE);
	ksz_write8(dev, REG_SW_MAC_CTRL_6, SW_MIB_COUNTER_FLUSH);
	ksz_pwrite32(dev, port, REG_PORT_MIB_CTRL_STAT__4, 0);
	mutex_unlock(&mib->cnt_mutex);

	mib->cnt_ptr = 0;
	memset(mib->counters, 0, dev->mib_cnt * sizeof(u64));
}

static enum dsa_tag_protocol ksz9477_get_tag_protocol(struct dsa_switch *ds,
						      int port,
						      enum dsa_tag_protocol mp)
{
	enum dsa_tag_protocol proto = DSA_TAG_PROTO_KSZ9477;
	struct ksz_device *dev = ds->priv;

	if (dev->features & IS_9893)
		proto = DSA_TAG_PROTO_KSZ9893;
	return proto;
}

static int ksz9477_phy_read16(struct dsa_switch *ds, int addr, int reg)
{
	struct ksz_device *dev = ds->priv;
	u16 val = 0xffff;

	/* No real PHY after this. Simulate the PHY.
	 * A fixed PHY can be setup in the device tree, but this function is
	 * still called for that port during initialization.
	 * For RGMII PHY there is no way to access it so the fixed PHY should
	 * be used.  For SGMII PHY the supporting code will be added later.
	 */
	if (addr >= dev->phy_port_cnt) {
		struct ksz_port *p = &dev->ports[addr];

		switch (reg) {
		case MII_BMCR:
			val = 0x1140;
			break;
		case MII_BMSR:
			val = 0x796d;
			break;
		case MII_PHYSID1:
			val = 0x0022;
			break;
		case MII_PHYSID2:
			val = 0x1631;
			break;
		case MII_ADVERTISE:
			val = 0x05e1;
			break;
		case MII_LPA:
			val = 0xc5e1;
			break;
		case MII_CTRL1000:
			val = 0x0700;
			break;
		case MII_STAT1000:
			if (p->phydev.speed == SPEED_1000)
				val = 0x3800;
			else
				val = 0;
			break;
		}
	} else {
		ksz_pread16(dev, addr, 0x100 + (reg << 1), &val);
	}

	return val;
}

static int ksz9477_phy_write16(struct dsa_switch *ds, int addr, int reg,
			       u16 val)
{
	struct ksz_device *dev = ds->priv;

	/* No real PHY after this. */
	if (addr >= dev->phy_port_cnt)
		return 0;

	/* No gigabit support.  Do not write to this register. */
	if (!(dev->features & GBIT_SUPPORT) && reg == MII_CTRL1000)
		return 0;
	ksz_pwrite16(dev, addr, 0x100 + (reg << 1), val);

	return 0;
}

static void ksz9477_get_strings(struct dsa_switch *ds, int port,
				u32 stringset, uint8_t *buf)
{
	int i;

	if (stringset != ETH_SS_STATS)
		return;

	for (i = 0; i < TOTAL_SWITCH_COUNTER_NUM; i++) {
		memcpy(buf + i * ETH_GSTRING_LEN, ksz9477_mib_names[i].string,
		       ETH_GSTRING_LEN);
	}
}

static void ksz9477_cfg_port_member(struct ksz_device *dev, int port,
				    u8 member)
{
	ksz_pwrite32(dev, port, REG_PORT_VLAN_MEMBERSHIP__4, member);
	dev->ports[port].member = member;
}

static void ksz9477_port_stp_state_set(struct dsa_switch *ds, int port,
				       u8 state)
{
	struct ksz_device *dev = ds->priv;
	struct ksz_port *p = &dev->ports[port];
	u8 data;
	int member = -1;
	int forward = dev->member;

	ksz_pread8(dev, port, P_STP_CTRL, &data);
	data &= ~(PORT_TX_ENABLE | PORT_RX_ENABLE | PORT_LEARN_DISABLE);

	switch (state) {
	case BR_STATE_DISABLED:
		data |= PORT_LEARN_DISABLE;
		if (port != dev->cpu_port)
			member = 0;
		break;
	case BR_STATE_LISTENING:
		data |= (PORT_RX_ENABLE | PORT_LEARN_DISABLE);
		if (port != dev->cpu_port &&
		    p->stp_state == BR_STATE_DISABLED)
			member = dev->host_mask | p->vid_member;
		break;
	case BR_STATE_LEARNING:
		data |= PORT_RX_ENABLE;
		break;
	case BR_STATE_FORWARDING:
		data |= (PORT_TX_ENABLE | PORT_RX_ENABLE);

		/* This function is also used internally. */
		if (port == dev->cpu_port)
			break;

		member = dev->host_mask | p->vid_member;
		mutex_lock(&dev->dev_mutex);

		/* Port is a member of a bridge. */
		if (dev->br_member & (1 << port)) {
			dev->member |= (1 << port);
			member = dev->member;
		}
		mutex_unlock(&dev->dev_mutex);
		break;
	case BR_STATE_BLOCKING:
		data |= PORT_LEARN_DISABLE;
		if (port != dev->cpu_port &&
		    p->stp_state == BR_STATE_DISABLED)
			member = dev->host_mask | p->vid_member;
		break;
	default:
		dev_err(ds->dev, "invalid STP state: %d\n", state);
		return;
	}

	ksz_pwrite8(dev, port, P_STP_CTRL, data);
	p->stp_state = state;
	mutex_lock(&dev->dev_mutex);
	/* Port membership may share register with STP state. */
	if (member >= 0 && member != p->member)
		ksz9477_cfg_port_member(dev, port, (u8)member);

	/* Check if forwarding needs to be updated. */
	if (state != BR_STATE_FORWARDING) {
		if (dev->br_member & (1 << port))
			dev->member &= ~(1 << port);
	}

	/* When topology has changed the function ksz_update_port_member
	 * should be called to modify port forwarding behavior.
	 */
	if (forward != dev->member)
		ksz_update_port_member(dev, port);
	mutex_unlock(&dev->dev_mutex);
}

static void ksz9477_flush_dyn_mac_table(struct ksz_device *dev, int port)
{
	u8 data;

	regmap_update_bits(dev->regmap[0], REG_SW_LUE_CTRL_2,
			   SW_FLUSH_OPTION_M << SW_FLUSH_OPTION_S,
			   SW_FLUSH_OPTION_DYN_MAC << SW_FLUSH_OPTION_S);

	if (port < dev->port_cnt) {
		/* flush individual port */
		ksz_pread8(dev, port, P_STP_CTRL, &data);
		if (!(data & PORT_LEARN_DISABLE))
			ksz_pwrite8(dev, port, P_STP_CTRL,
				    data | PORT_LEARN_DISABLE);
		ksz_cfg(dev, S_FLUSH_TABLE_CTRL, SW_FLUSH_DYN_MAC_TABLE, true);
		ksz_pwrite8(dev, port, P_STP_CTRL, data);
	} else {
		/* flush all */
		ksz_cfg(dev, S_FLUSH_TABLE_CTRL, SW_FLUSH_STP_TABLE, true);
	}
}

static int ksz9477_port_vlan_filtering(struct dsa_switch *ds, int port,
				       bool flag,
				       struct netlink_ext_ack *extack)
{
	struct ksz_device *dev = ds->priv;

	if (flag) {
		ksz_port_cfg(dev, port, REG_PORT_LUE_CTRL,
			     PORT_VLAN_LOOKUP_VID_0, true);
		ksz_cfg(dev, REG_SW_LUE_CTRL_0, SW_VLAN_ENABLE, true);
	} else {
		ksz_cfg(dev, REG_SW_LUE_CTRL_0, SW_VLAN_ENABLE, false);
		ksz_port_cfg(dev, port, REG_PORT_LUE_CTRL,
			     PORT_VLAN_LOOKUP_VID_0, false);
	}

	return 0;
}

static int ksz9477_port_vlan_add(struct dsa_switch *ds, int port,
				 const struct switchdev_obj_port_vlan *vlan,
				 struct netlink_ext_ack *extack)
{
	struct ksz_device *dev = ds->priv;
	u32 vlan_table[3];
	bool untagged = vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED;
	int err;

	err = ksz9477_get_vlan_table(dev, vlan->vid, vlan_table);
	if (err) {
		NL_SET_ERR_MSG_MOD(extack, "Failed to get vlan table");
		return err;
	}

	vlan_table[0] = VLAN_VALID | (vlan->vid & VLAN_FID_M);
	if (untagged)
		vlan_table[1] |= BIT(port);
	else
		vlan_table[1] &= ~BIT(port);
	vlan_table[1] &= ~(BIT(dev->cpu_port));

	vlan_table[2] |= BIT(port) | BIT(dev->cpu_port);

	err = ksz9477_set_vlan_table(dev, vlan->vid, vlan_table);
	if (err) {
		NL_SET_ERR_MSG_MOD(extack, "Failed to set vlan table");
		return err;
	}

	/* change PVID */
	if (vlan->flags & BRIDGE_VLAN_INFO_PVID)
		ksz_pwrite16(dev, port, REG_PORT_DEFAULT_VID, vlan->vid);

	return 0;
}

static int ksz9477_port_vlan_del(struct dsa_switch *ds, int port,
				 const struct switchdev_obj_port_vlan *vlan)
{
	struct ksz_device *dev = ds->priv;
	bool untagged = vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED;
	u32 vlan_table[3];
	u16 pvid;

	ksz_pread16(dev, port, REG_PORT_DEFAULT_VID, &pvid);
	pvid = pvid & 0xFFF;

	if (ksz9477_get_vlan_table(dev, vlan->vid, vlan_table)) {
		dev_dbg(dev->dev, "Failed to get vlan table\n");
		return -ETIMEDOUT;
	}

	vlan_table[2] &= ~BIT(port);

	if (pvid == vlan->vid)
		pvid = 1;

	if (untagged)
		vlan_table[1] &= ~BIT(port);

	if (ksz9477_set_vlan_table(dev, vlan->vid, vlan_table)) {
		dev_dbg(dev->dev, "Failed to set vlan table\n");
		return -ETIMEDOUT;
	}

	ksz_pwrite16(dev, port, REG_PORT_DEFAULT_VID, pvid);

	return 0;
}

static int ksz9477_port_fdb_add(struct dsa_switch *ds, int port,
				const unsigned char *addr, u16 vid)
{
	struct ksz_device *dev = ds->priv;
	u32 alu_table[4];
	u32 data;
	int ret = 0;

	mutex_lock(&dev->alu_mutex);

	/* find any entry with mac & vid */
	data = vid << ALU_FID_INDEX_S;
	data |= ((addr[0] << 8) | addr[1]);
	ksz_write32(dev, REG_SW_ALU_INDEX_0, data);

	data = ((addr[2] << 24) | (addr[3] << 16));
	data |= ((addr[4] << 8) | addr[5]);
	ksz_write32(dev, REG_SW_ALU_INDEX_1, data);

	/* start read operation */
	ksz_write32(dev, REG_SW_ALU_CTRL__4, ALU_READ | ALU_START);

	/* wait to be finished */
	ret = ksz9477_wait_alu_ready(dev);
	if (ret) {
		dev_dbg(dev->dev, "Failed to read ALU\n");
		goto exit;
	}

	/* read ALU entry */
	ksz9477_read_table(dev, alu_table);

	/* update ALU entry */
	alu_table[0] = ALU_V_STATIC_VALID;
	alu_table[1] |= BIT(port);
	if (vid)
		alu_table[1] |= ALU_V_USE_FID;
	alu_table[2] = (vid << ALU_V_FID_S);
	alu_table[2] |= ((addr[0] << 8) | addr[1]);
	alu_table[3] = ((addr[2] << 24) | (addr[3] << 16));
	alu_table[3] |= ((addr[4] << 8) | addr[5]);

	ksz9477_write_table(dev, alu_table);

	ksz_write32(dev, REG_SW_ALU_CTRL__4, ALU_WRITE | ALU_START);

	/* wait to be finished */
	ret = ksz9477_wait_alu_ready(dev);
	if (ret)
		dev_dbg(dev->dev, "Failed to write ALU\n");

exit:
	mutex_unlock(&dev->alu_mutex);

	return ret;
}

static int ksz9477_port_fdb_del(struct dsa_switch *ds, int port,
				const unsigned char *addr, u16 vid)
{
	struct ksz_device *dev = ds->priv;
	u32 alu_table[4];
	u32 data;
	int ret = 0;

	mutex_lock(&dev->alu_mutex);

	/* read any entry with mac & vid */
	data = vid << ALU_FID_INDEX_S;
	data |= ((addr[0] << 8) | addr[1]);
	ksz_write32(dev, REG_SW_ALU_INDEX_0, data);

	data = ((addr[2] << 24) | (addr[3] << 16));
	data |= ((addr[4] << 8) | addr[5]);
	ksz_write32(dev, REG_SW_ALU_INDEX_1, data);

	/* start read operation */
	ksz_write32(dev, REG_SW_ALU_CTRL__4, ALU_READ | ALU_START);

	/* wait to be finished */
	ret = ksz9477_wait_alu_ready(dev);
	if (ret) {
		dev_dbg(dev->dev, "Failed to read ALU\n");
		goto exit;
	}

	ksz_read32(dev, REG_SW_ALU_VAL_A, &alu_table[0]);
	if (alu_table[0] & ALU_V_STATIC_VALID) {
		ksz_read32(dev, REG_SW_ALU_VAL_B, &alu_table[1]);
		ksz_read32(dev, REG_SW_ALU_VAL_C, &alu_table[2]);
		ksz_read32(dev, REG_SW_ALU_VAL_D, &alu_table[3]);

		/* clear forwarding port */
		alu_table[2] &= ~BIT(port);

		/* if there is no port to forward, clear table */
		if ((alu_table[2] & ALU_V_PORT_MAP) == 0) {
			alu_table[0] = 0;
			alu_table[1] = 0;
			alu_table[2] = 0;
			alu_table[3] = 0;
		}
	} else {
		alu_table[0] = 0;
		alu_table[1] = 0;
		alu_table[2] = 0;
		alu_table[3] = 0;
	}

	ksz9477_write_table(dev, alu_table);

	ksz_write32(dev, REG_SW_ALU_CTRL__4, ALU_WRITE | ALU_START);

	/* wait to be finished */
	ret = ksz9477_wait_alu_ready(dev);
	if (ret)
		dev_dbg(dev->dev, "Failed to write ALU\n");

exit:
	mutex_unlock(&dev->alu_mutex);

	return ret;
}

static void ksz9477_convert_alu(struct alu_struct *alu, u32 *alu_table)
{
	alu->is_static = !!(alu_table[0] & ALU_V_STATIC_VALID);
	alu->is_src_filter = !!(alu_table[0] & ALU_V_SRC_FILTER);
	alu->is_dst_filter = !!(alu_table[0] & ALU_V_DST_FILTER);
	alu->prio_age = (alu_table[0] >> ALU_V_PRIO_AGE_CNT_S) &
			ALU_V_PRIO_AGE_CNT_M;
	alu->mstp = alu_table[0] & ALU_V_MSTP_M;

	alu->is_override = !!(alu_table[1] & ALU_V_OVERRIDE);
	alu->is_use_fid = !!(alu_table[1] & ALU_V_USE_FID);
	alu->port_forward = alu_table[1] & ALU_V_PORT_MAP;

	alu->fid = (alu_table[2] >> ALU_V_FID_S) & ALU_V_FID_M;

	alu->mac[0] = (alu_table[2] >> 8) & 0xFF;
	alu->mac[1] = alu_table[2] & 0xFF;
	alu->mac[2] = (alu_table[3] >> 24) & 0xFF;
	alu->mac[3] = (alu_table[3] >> 16) & 0xFF;
	alu->mac[4] = (alu_table[3] >> 8) & 0xFF;
	alu->mac[5] = alu_table[3] & 0xFF;
}

static int ksz9477_port_fdb_dump(struct dsa_switch *ds, int port,
				 dsa_fdb_dump_cb_t *cb, void *data)
{
	struct ksz_device *dev = ds->priv;
	int ret = 0;
	u32 ksz_data;
	u32 alu_table[4];
	struct alu_struct alu;
	int timeout;

	mutex_lock(&dev->alu_mutex);

	/* start ALU search */
	ksz_write32(dev, REG_SW_ALU_CTRL__4, ALU_START | ALU_SEARCH);

	do {
		timeout = 1000;
		do {
			ksz_read32(dev, REG_SW_ALU_CTRL__4, &ksz_data);
			if ((ksz_data & ALU_VALID) || !(ksz_data & ALU_START))
				break;
			usleep_range(1, 10);
		} while (timeout-- > 0);

		if (!timeout) {
			dev_dbg(dev->dev, "Failed to search ALU\n");
			ret = -ETIMEDOUT;
			goto exit;
		}

		/* read ALU table */
		ksz9477_read_table(dev, alu_table);

		ksz9477_convert_alu(&alu, alu_table);

		if (alu.port_forward & BIT(port)) {
			ret = cb(alu.mac, alu.fid, alu.is_static, data);
			if (ret)
				goto exit;
		}
	} while (ksz_data & ALU_START);

exit:

	/* stop ALU search */
	ksz_write32(dev, REG_SW_ALU_CTRL__4, 0);

	mutex_unlock(&dev->alu_mutex);

	return ret;
}

static int ksz9477_port_mdb_add(struct dsa_switch *ds, int port,
				const struct switchdev_obj_port_mdb *mdb)
{
	struct ksz_device *dev = ds->priv;
	u32 static_table[4];
	u32 data;
	int index;
	u32 mac_hi, mac_lo;
	int err = 0;

	mac_hi = ((mdb->addr[0] << 8) | mdb->addr[1]);
	mac_lo = ((mdb->addr[2] << 24) | (mdb->addr[3] << 16));
	mac_lo |= ((mdb->addr[4] << 8) | mdb->addr[5]);

	mutex_lock(&dev->alu_mutex);

	for (index = 0; index < dev->num_statics; index++) {
		/* find empty slot first */
		data = (index << ALU_STAT_INDEX_S) |
			ALU_STAT_READ | ALU_STAT_START;
		ksz_write32(dev, REG_SW_ALU_STAT_CTRL__4, data);

		/* wait to be finished */
		err = ksz9477_wait_alu_sta_ready(dev);
		if (err) {
			dev_dbg(dev->dev, "Failed to read ALU STATIC\n");
			goto exit;
		}

		/* read ALU static table */
		ksz9477_read_table(dev, static_table);

		if (static_table[0] & ALU_V_STATIC_VALID) {
			/* check this has same vid & mac address */
			if (((static_table[2] >> ALU_V_FID_S) == mdb->vid) &&
			    ((static_table[2] & ALU_V_MAC_ADDR_HI) == mac_hi) &&
			    static_table[3] == mac_lo) {
				/* found matching one */
				break;
			}
		} else {
			/* found empty one */
			break;
		}
	}

	/* no available entry */
	if (index == dev->num_statics) {
		err = -ENOSPC;
		goto exit;
	}

	/* add entry */
	static_table[0] = ALU_V_STATIC_VALID;
	static_table[1] |= BIT(port);
	if (mdb->vid)
		static_table[1] |= ALU_V_USE_FID;
	static_table[2] = (mdb->vid << ALU_V_FID_S);
	static_table[2] |= mac_hi;
	static_table[3] = mac_lo;

	ksz9477_write_table(dev, static_table);

	data = (index << ALU_STAT_INDEX_S) | ALU_STAT_START;
	ksz_write32(dev, REG_SW_ALU_STAT_CTRL__4, data);

	/* wait to be finished */
	if (ksz9477_wait_alu_sta_ready(dev))
		dev_dbg(dev->dev, "Failed to read ALU STATIC\n");

exit:
	mutex_unlock(&dev->alu_mutex);
	return err;
}

static int ksz9477_port_mdb_del(struct dsa_switch *ds, int port,
				const struct switchdev_obj_port_mdb *mdb)
{
	struct ksz_device *dev = ds->priv;
	u32 static_table[4];
	u32 data;
	int index;
	int ret = 0;
	u32 mac_hi, mac_lo;

	mac_hi = ((mdb->addr[0] << 8) | mdb->addr[1]);
	mac_lo = ((mdb->addr[2] << 24) | (mdb->addr[3] << 16));
	mac_lo |= ((mdb->addr[4] << 8) | mdb->addr[5]);

	mutex_lock(&dev->alu_mutex);

	for (index = 0; index < dev->num_statics; index++) {
		/* find empty slot first */
		data = (index << ALU_STAT_INDEX_S) |
			ALU_STAT_READ | ALU_STAT_START;
		ksz_write32(dev, REG_SW_ALU_STAT_CTRL__4, data);

		/* wait to be finished */
		ret = ksz9477_wait_alu_sta_ready(dev);
		if (ret) {
			dev_dbg(dev->dev, "Failed to read ALU STATIC\n");
			goto exit;
		}

		/* read ALU static table */
		ksz9477_read_table(dev, static_table);

		if (static_table[0] & ALU_V_STATIC_VALID) {
			/* check this has same vid & mac address */

			if (((static_table[2] >> ALU_V_FID_S) == mdb->vid) &&
			    ((static_table[2] & ALU_V_MAC_ADDR_HI) == mac_hi) &&
			    static_table[3] == mac_lo) {
				/* found matching one */
				break;
			}
		}
	}

	/* no available entry */
	if (index == dev->num_statics)
		goto exit;

	/* clear port */
	static_table[1] &= ~BIT(port);

	if ((static_table[1] & ALU_V_PORT_MAP) == 0) {
		/* delete entry */
		static_table[0] = 0;
		static_table[1] = 0;
		static_table[2] = 0;
		static_table[3] = 0;
	}

	ksz9477_write_table(dev, static_table);

	data = (index << ALU_STAT_INDEX_S) | ALU_STAT_START;
	ksz_write32(dev, REG_SW_ALU_STAT_CTRL__4, data);

	/* wait to be finished */
	ret = ksz9477_wait_alu_sta_ready(dev);
	if (ret)
		dev_dbg(dev->dev, "Failed to read ALU STATIC\n");

exit:
	mutex_unlock(&dev->alu_mutex);

	return ret;
}

static int ksz9477_port_mirror_add(struct dsa_switch *ds, int port,
				   struct dsa_mall_mirror_tc_entry *mirror,
				   bool ingress)
{
	struct ksz_device *dev = ds->priv;

	if (ingress)
		ksz_port_cfg(dev, port, P_MIRROR_CTRL, PORT_MIRROR_RX, true);
	else
		ksz_port_cfg(dev, port, P_MIRROR_CTRL, PORT_MIRROR_TX, true);

	ksz_port_cfg(dev, port, P_MIRROR_CTRL, PORT_MIRROR_SNIFFER, false);

	/* configure mirror port */
	ksz_port_cfg(dev, mirror->to_local_port, P_MIRROR_CTRL,
		     PORT_MIRROR_SNIFFER, true);

	ksz_cfg(dev, S_MIRROR_CTRL, SW_MIRROR_RX_TX, false);

	return 0;
}

static void ksz9477_port_mirror_del(struct dsa_switch *ds, int port,
				    struct dsa_mall_mirror_tc_entry *mirror)
{
	struct ksz_device *dev = ds->priv;
	u8 data;

	if (mirror->ingress)
		ksz_port_cfg(dev, port, P_MIRROR_CTRL, PORT_MIRROR_RX, false);
	else
		ksz_port_cfg(dev, port, P_MIRROR_CTRL, PORT_MIRROR_TX, false);

	ksz_pread8(dev, port, P_MIRROR_CTRL, &data);

	if (!(data & (PORT_MIRROR_RX | PORT_MIRROR_TX)))
		ksz_port_cfg(dev, mirror->to_local_port, P_MIRROR_CTRL,
			     PORT_MIRROR_SNIFFER, false);
}

static bool ksz9477_get_gbit(struct ksz_device *dev, u8 data)
{
	bool gbit;

	if (dev->features & NEW_XMII)
		gbit = !(data & PORT_MII_NOT_1GBIT);
	else
		gbit = !!(data & PORT_MII_1000MBIT_S1);
	return gbit;
}

static void ksz9477_set_gbit(struct ksz_device *dev, bool gbit, u8 *data)
{
	if (dev->features & NEW_XMII) {
		if (gbit)
			*data &= ~PORT_MII_NOT_1GBIT;
		else
			*data |= PORT_MII_NOT_1GBIT;
	} else {
		if (gbit)
			*data |= PORT_MII_1000MBIT_S1;
		else
			*data &= ~PORT_MII_1000MBIT_S1;
	}
}

static int ksz9477_get_xmii(struct ksz_device *dev, u8 data)
{
	int mode;

	if (dev->features & NEW_XMII) {
		switch (data & PORT_MII_SEL_M) {
		case PORT_MII_SEL:
			mode = 0;
			break;
		case PORT_RMII_SEL:
			mode = 1;
			break;
		case PORT_GMII_SEL:
			mode = 2;
			break;
		default:
			mode = 3;
		}
	} else {
		switch (data & PORT_MII_SEL_M) {
		case PORT_MII_SEL_S1:
			mode = 0;
			break;
		case PORT_RMII_SEL_S1:
			mode = 1;
			break;
		case PORT_GMII_SEL_S1:
			mode = 2;
			break;
		default:
			mode = 3;
		}
	}
	return mode;
}

static void ksz9477_set_xmii(struct ksz_device *dev, int mode, u8 *data)
{
	u8 xmii;

	if (dev->features & NEW_XMII) {
		switch (mode) {
		case 0:
			xmii = PORT_MII_SEL;
			break;
		case 1:
			xmii = PORT_RMII_SEL;
			break;
		case 2:
			xmii = PORT_GMII_SEL;
			break;
		default:
			xmii = PORT_RGMII_SEL;
			break;
		}
	} else {
		switch (mode) {
		case 0:
			xmii = PORT_MII_SEL_S1;
			break;
		case 1:
			xmii = PORT_RMII_SEL_S1;
			break;
		case 2:
			xmii = PORT_GMII_SEL_S1;
			break;
		default:
			xmii = PORT_RGMII_SEL_S1;
			break;
		}
	}
	*data &= ~PORT_MII_SEL_M;
	*data |= xmii;
}

static phy_interface_t ksz9477_get_interface(struct ksz_device *dev, int port)
{
	phy_interface_t interface;
	bool gbit;
	int mode;
	u8 data8;

	if (port < dev->phy_port_cnt)
		return PHY_INTERFACE_MODE_NA;
	ksz_pread8(dev, port, REG_PORT_XMII_CTRL_1, &data8);
	gbit = ksz9477_get_gbit(dev, data8);
	mode = ksz9477_get_xmii(dev, data8);
	switch (mode) {
	case 2:
		interface = PHY_INTERFACE_MODE_GMII;
		if (gbit)
			break;
		fallthrough;
	case 0:
		interface = PHY_INTERFACE_MODE_MII;
		break;
	case 1:
		interface = PHY_INTERFACE_MODE_RMII;
		break;
	default:
		interface = PHY_INTERFACE_MODE_RGMII;
		if (data8 & PORT_RGMII_ID_EG_ENABLE)
			interface = PHY_INTERFACE_MODE_RGMII_TXID;
		if (data8 & PORT_RGMII_ID_IG_ENABLE) {
			interface = PHY_INTERFACE_MODE_RGMII_RXID;
			if (data8 & PORT_RGMII_ID_EG_ENABLE)
				interface = PHY_INTERFACE_MODE_RGMII_ID;
		}
		break;
	}
	return interface;
}

static void ksz9477_port_mmd_write(struct ksz_device *dev, int port,
				   u8 dev_addr, u16 reg_addr, u16 val)
{
	ksz_pwrite16(dev, port, REG_PORT_PHY_MMD_SETUP,
		     MMD_SETUP(PORT_MMD_OP_INDEX, dev_addr));
	ksz_pwrite16(dev, port, REG_PORT_PHY_MMD_INDEX_DATA, reg_addr);
	ksz_pwrite16(dev, port, REG_PORT_PHY_MMD_SETUP,
		     MMD_SETUP(PORT_MMD_OP_DATA_NO_INCR, dev_addr));
	ksz_pwrite16(dev, port, REG_PORT_PHY_MMD_INDEX_DATA, val);
}

static void ksz9477_phy_errata_setup(struct ksz_device *dev, int port)
{
	/* Apply PHY settings to address errata listed in
	 * KSZ9477, KSZ9897, KSZ9896, KSZ9567, KSZ8565
	 * Silicon Errata and Data Sheet Clarification documents:
	 *
	 * Register settings are needed to improve PHY receive performance
	 */
	ksz9477_port_mmd_write(dev, port, 0x01, 0x6f, 0xdd0b);
	ksz9477_port_mmd_write(dev, port, 0x01, 0x8f, 0x6032);
	ksz9477_port_mmd_write(dev, port, 0x01, 0x9d, 0x248c);
	ksz9477_port_mmd_write(dev, port, 0x01, 0x75, 0x0060);
	ksz9477_port_mmd_write(dev, port, 0x01, 0xd3, 0x7777);
	ksz9477_port_mmd_write(dev, port, 0x1c, 0x06, 0x3008);
	ksz9477_port_mmd_write(dev, port, 0x1c, 0x08, 0x2001);

	/* Transmit waveform amplitude can be improved
	 * (1000BASE-T, 100BASE-TX, 10BASE-Te)
	 */
	ksz9477_port_mmd_write(dev, port, 0x1c, 0x04, 0x00d0);

	/* Energy Efficient Ethernet (EEE) feature select must
	 * be manually disabled (except on KSZ8565 which is 100Mbit)
	 */
	if (dev->features & GBIT_SUPPORT)
		ksz9477_port_mmd_write(dev, port, 0x07, 0x3c, 0x0000);

	/* Register settings are required to meet data sheet
	 * supply current specifications
	 */
	ksz9477_port_mmd_write(dev, port, 0x1c, 0x13, 0x6eff);
	ksz9477_port_mmd_write(dev, port, 0x1c, 0x14, 0xe6ff);
	ksz9477_port_mmd_write(dev, port, 0x1c, 0x15, 0x6eff);
	ksz9477_port_mmd_write(dev, port, 0x1c, 0x16, 0xe6ff);
	ksz9477_port_mmd_write(dev, port, 0x1c, 0x17, 0x00ff);
	ksz9477_port_mmd_write(dev, port, 0x1c, 0x18, 0x43ff);
	ksz9477_port_mmd_write(dev, port, 0x1c, 0x19, 0xc3ff);
	ksz9477_port_mmd_write(dev, port, 0x1c, 0x1a, 0x6fff);
	ksz9477_port_mmd_write(dev, port, 0x1c, 0x1b, 0x07ff);
	ksz9477_port_mmd_write(dev, port, 0x1c, 0x1c, 0x0fff);
	ksz9477_port_mmd_write(dev, port, 0x1c, 0x1d, 0xe7ff);
	ksz9477_port_mmd_write(dev, port, 0x1c, 0x1e, 0xefff);
	ksz9477_port_mmd_write(dev, port, 0x1c, 0x20, 0xeeee);
}

static void ksz9477_port_setup(struct ksz_device *dev, int port, bool cpu_port)
{
	u8 data8;
	u8 member;
	u16 data16;
	struct ksz_port *p = &dev->ports[port];

	/* enable tag tail for host port */
	if (cpu_port)
		ksz_port_cfg(dev, port, REG_PORT_CTRL_0, PORT_TAIL_TAG_ENABLE,
			     true);

	ksz_port_cfg(dev, port, REG_PORT_CTRL_0, PORT_MAC_LOOPBACK, false);

	/* set back pressure */
	ksz_port_cfg(dev, port, REG_PORT_MAC_CTRL_1, PORT_BACK_PRESSURE, true);

	/* enable broadcast storm limit */
	ksz_port_cfg(dev, port, P_BCAST_STORM_CTRL, PORT_BROADCAST_STORM, true);

	/* disable DiffServ priority */
	ksz_port_cfg(dev, port, P_PRIO_CTRL, PORT_DIFFSERV_PRIO_ENABLE, false);

	/* replace priority */
	ksz_port_cfg(dev, port, REG_PORT_MRI_MAC_CTRL, PORT_USER_PRIO_CEILING,
		     false);
	ksz9477_port_cfg32(dev, port, REG_PORT_MTI_QUEUE_CTRL_0__4,
			   MTI_PVID_REPLACE, false);

	/* enable 802.1p priority */
	ksz_port_cfg(dev, port, P_PRIO_CTRL, PORT_802_1P_PRIO_ENABLE, true);

	if (port < dev->phy_port_cnt) {
		/* do not force flow control */
		ksz_port_cfg(dev, port, REG_PORT_CTRL_0,
			     PORT_FORCE_TX_FLOW_CTRL | PORT_FORCE_RX_FLOW_CTRL,
			     false);

		if (dev->phy_errata_9477)
			ksz9477_phy_errata_setup(dev, port);
	} else {
		/* force flow control */
		ksz_port_cfg(dev, port, REG_PORT_CTRL_0,
			     PORT_FORCE_TX_FLOW_CTRL | PORT_FORCE_RX_FLOW_CTRL,
			     true);

		/* configure MAC to 1G & RGMII mode */
		ksz_pread8(dev, port, REG_PORT_XMII_CTRL_1, &data8);
		switch (p->interface) {
		case PHY_INTERFACE_MODE_MII:
			ksz9477_set_xmii(dev, 0, &data8);
			ksz9477_set_gbit(dev, false, &data8);
			p->phydev.speed = SPEED_100;
			break;
		case PHY_INTERFACE_MODE_RMII:
			ksz9477_set_xmii(dev, 1, &data8);
			ksz9477_set_gbit(dev, false, &data8);
			p->phydev.speed = SPEED_100;
			break;
		case PHY_INTERFACE_MODE_GMII:
			ksz9477_set_xmii(dev, 2, &data8);
			ksz9477_set_gbit(dev, true, &data8);
			p->phydev.speed = SPEED_1000;
			break;
		default:
			ksz9477_set_xmii(dev, 3, &data8);
			ksz9477_set_gbit(dev, true, &data8);
			data8 &= ~PORT_RGMII_ID_IG_ENABLE;
			data8 &= ~PORT_RGMII_ID_EG_ENABLE;
			if (p->interface == PHY_INTERFACE_MODE_RGMII_ID ||
			    p->interface == PHY_INTERFACE_MODE_RGMII_RXID)
				data8 |= PORT_RGMII_ID_IG_ENABLE;
			if (p->interface == PHY_INTERFACE_MODE_RGMII_ID ||
			    p->interface == PHY_INTERFACE_MODE_RGMII_TXID)
				data8 |= PORT_RGMII_ID_EG_ENABLE;
			/* On KSZ9893, disable RGMII in-band status support */
			if (dev->features & IS_9893)
				data8 &= ~PORT_MII_MAC_MODE;
			p->phydev.speed = SPEED_1000;
			break;
		}
		ksz_pwrite8(dev, port, REG_PORT_XMII_CTRL_1, data8);
		p->phydev.duplex = 1;
	}
	mutex_lock(&dev->dev_mutex);
	if (cpu_port)
		member = dev->port_mask;
	else
		member = dev->host_mask | p->vid_member;
	mutex_unlock(&dev->dev_mutex);
	ksz9477_cfg_port_member(dev, port, member);

	/* clear pending interrupts */
	if (port < dev->phy_port_cnt)
		ksz_pread16(dev, port, REG_PORT_PHY_INT_ENABLE, &data16);
}

static void ksz9477_config_cpu_port(struct dsa_switch *ds)
{
	struct ksz_device *dev = ds->priv;
	struct ksz_port *p;
	int i;

	for (i = 0; i < dev->port_cnt; i++) {
		if (dsa_is_cpu_port(ds, i) && (dev->cpu_ports & (1 << i))) {
			phy_interface_t interface;
			const char *prev_msg;
			const char *prev_mode;

			dev->cpu_port = i;
			dev->host_mask = (1 << dev->cpu_port);
			dev->port_mask |= dev->host_mask;
			p = &dev->ports[i];

			/* Read from XMII register to determine host port
			 * interface.  If set specifically in device tree
			 * note the difference to help debugging.
			 */
			interface = ksz9477_get_interface(dev, i);
			if (!p->interface) {
				if (dev->compat_interface) {
					dev_warn(dev->dev,
						 "Using legacy switch \"phy-mode\" property, because it is missing on port %d node. "
						 "Please update your device tree.\n",
						 i);
					p->interface = dev->compat_interface;
				} else {
					p->interface = interface;
				}
			}
			if (interface && interface != p->interface) {
				prev_msg = " instead of ";
				prev_mode = phy_modes(interface);
			} else {
				prev_msg = "";
				prev_mode = "";
			}
			dev_info(dev->dev,
				 "Port%d: using phy mode %s%s%s\n",
				 i,
				 phy_modes(p->interface),
				 prev_msg,
				 prev_mode);

			/* enable cpu port */
			ksz9477_port_setup(dev, i, true);
			p->vid_member = dev->port_mask;
			p->on = 1;
		}
	}

	dev->member = dev->host_mask;

	for (i = 0; i < dev->port_cnt; i++) {
		if (i == dev->cpu_port)
			continue;
		p = &dev->ports[i];

		/* Initialize to non-zero so that ksz_cfg_port_member() will
		 * be called.
		 */
		p->vid_member = (1 << i);
		p->member = dev->port_mask;
		ksz9477_port_stp_state_set(ds, i, BR_STATE_DISABLED);
		p->on = 1;
		if (i < dev->phy_port_cnt)
			p->phy = 1;
		if (dev->chip_id == 0x00947700 && i == 6) {
			p->sgmii = 1;

			/* SGMII PHY detection code is not implemented yet. */
			p->phy = 0;
		}
	}
}

static int ksz9477_setup(struct dsa_switch *ds)
{
	struct ksz_device *dev = ds->priv;
	int ret = 0;

	dev->vlan_cache = devm_kcalloc(dev->dev, sizeof(struct vlan_table),
				       dev->num_vlans, GFP_KERNEL);
	if (!dev->vlan_cache)
		return -ENOMEM;

	ret = ksz9477_reset_switch(dev);
	if (ret) {
		dev_err(ds->dev, "failed to reset switch\n");
		return ret;
	}

	/* Required for port partitioning. */
	ksz9477_cfg32(dev, REG_SW_QM_CTRL__4, UNICAST_VLAN_BOUNDARY,
		      true);

	/* Do not work correctly with tail tagging. */
	ksz_cfg(dev, REG_SW_MAC_CTRL_0, SW_CHECK_LENGTH, false);

	/* accept packet up to 2000bytes */
	ksz_cfg(dev, REG_SW_MAC_CTRL_1, SW_LEGAL_PACKET_DISABLE, true);

	ksz9477_config_cpu_port(ds);

	ksz_cfg(dev, REG_SW_MAC_CTRL_1, MULTICAST_STORM_DISABLE, true);

	/* queue based egress rate limit */
	ksz_cfg(dev, REG_SW_MAC_CTRL_5, SW_OUT_RATE_LIMIT_QUEUE_BASED, true);

	/* enable global MIB counter freeze function */
	ksz_cfg(dev, REG_SW_MAC_CTRL_6, SW_MIB_COUNTER_FREEZE, true);

	/* start switch */
	ksz_cfg(dev, REG_SW_OPERATION, SW_START, true);

	ksz_init_mib_timer(dev);

	ds->configure_vlan_while_not_filtering = false;

	return 0;
}

static const struct dsa_switch_ops ksz9477_switch_ops = {
	.get_tag_protocol	= ksz9477_get_tag_protocol,
	.setup			= ksz9477_setup,
	.phy_read		= ksz9477_phy_read16,
	.phy_write		= ksz9477_phy_write16,
	.phylink_mac_link_down	= ksz_mac_link_down,
	.port_enable		= ksz_enable_port,
	.get_strings		= ksz9477_get_strings,
	.get_ethtool_stats	= ksz_get_ethtool_stats,
	.get_sset_count		= ksz_sset_count,
	.port_bridge_join	= ksz_port_bridge_join,
	.port_bridge_leave	= ksz_port_bridge_leave,
	.port_stp_state_set	= ksz9477_port_stp_state_set,
	.port_fast_age		= ksz_port_fast_age,
	.port_vlan_filtering	= ksz9477_port_vlan_filtering,
	.port_vlan_add		= ksz9477_port_vlan_add,
	.port_vlan_del		= ksz9477_port_vlan_del,
	.port_fdb_dump		= ksz9477_port_fdb_dump,
	.port_fdb_add		= ksz9477_port_fdb_add,
	.port_fdb_del		= ksz9477_port_fdb_del,
	.port_mdb_add           = ksz9477_port_mdb_add,
	.port_mdb_del           = ksz9477_port_mdb_del,
	.port_mirror_add	= ksz9477_port_mirror_add,
	.port_mirror_del	= ksz9477_port_mirror_del,
};

static u32 ksz9477_get_port_addr(int port, int offset)
{
	return PORT_CTRL_ADDR(port, offset);
}

static int ksz9477_switch_detect(struct ksz_device *dev)
{
	u8 data8;
	u8 id_hi;
	u8 id_lo;
	u32 id32;
	int ret;

	/* turn off SPI DO Edge select */
	ret = ksz_read8(dev, REG_SW_GLOBAL_SERIAL_CTRL_0, &data8);
	if (ret)
		return ret;

	data8 &= ~SPI_AUTO_EDGE_DETECTION;
	ret = ksz_write8(dev, REG_SW_GLOBAL_SERIAL_CTRL_0, data8);
	if (ret)
		return ret;

	/* read chip id */
	ret = ksz_read32(dev, REG_CHIP_ID0__1, &id32);
	if (ret)
		return ret;
	ret = ksz_read8(dev, REG_GLOBAL_OPTIONS, &data8);
	if (ret)
		return ret;

	/* Number of ports can be reduced depending on chip. */
	dev->phy_port_cnt = 5;

	/* Default capability is gigabit capable. */
	dev->features = GBIT_SUPPORT;

	dev_dbg(dev->dev, "Switch detect: ID=%08x%02x\n", id32, data8);
	id_hi = (u8)(id32 >> 16);
	id_lo = (u8)(id32 >> 8);
	if ((id_lo & 0xf) == 3) {
		/* Chip is from KSZ9893 design. */
		dev_info(dev->dev, "Found KSZ9893\n");
		dev->features |= IS_9893;

		/* Chip does not support gigabit. */
		if (data8 & SW_QW_ABLE)
			dev->features &= ~GBIT_SUPPORT;
		dev->phy_port_cnt = 2;
	} else {
		dev_info(dev->dev, "Found KSZ9477 or compatible\n");
		/* Chip uses new XMII register definitions. */
		dev->features |= NEW_XMII;

		/* Chip does not support gigabit. */
		if (!(data8 & SW_GIGABIT_ABLE))
			dev->features &= ~GBIT_SUPPORT;
	}

	/* Change chip id to known ones so it can be matched against them. */
	id32 = (id_hi << 16) | (id_lo << 8);

	dev->chip_id = id32;

	return 0;
}

struct ksz_chip_data {
	u32 chip_id;
	const char *dev_name;
	int num_vlans;
	int num_alus;
	int num_statics;
	int cpu_ports;
	int port_cnt;
	bool phy_errata_9477;
};

static const struct ksz_chip_data ksz9477_switch_chips[] = {
	{
		.chip_id = 0x00947700,
		.dev_name = "KSZ9477",
		.num_vlans = 4096,
		.num_alus = 4096,
		.num_statics = 16,
		.cpu_ports = 0x7F,	/* can be configured as cpu port */
		.port_cnt = 7,		/* total physical port count */
		.phy_errata_9477 = true,
	},
	{
		.chip_id = 0x00989700,
		.dev_name = "KSZ9897",
		.num_vlans = 4096,
		.num_alus = 4096,
		.num_statics = 16,
		.cpu_ports = 0x7F,	/* can be configured as cpu port */
		.port_cnt = 7,		/* total physical port count */
		.phy_errata_9477 = true,
	},
	{
		.chip_id = 0x00989300,
		.dev_name = "KSZ9893",
		.num_vlans = 4096,
		.num_alus = 4096,
		.num_statics = 16,
		.cpu_ports = 0x07,	/* can be configured as cpu port */
		.port_cnt = 3,		/* total port count */
	},
	{
		.chip_id = 0x00956700,
		.dev_name = "KSZ9567",
		.num_vlans = 4096,
		.num_alus = 4096,
		.num_statics = 16,
		.cpu_ports = 0x7F,	/* can be configured as cpu port */
		.port_cnt = 7,		/* total physical port count */
		.phy_errata_9477 = true,
	},
};

static int ksz9477_switch_init(struct ksz_device *dev)
{
	int i;

	dev->ds->ops = &ksz9477_switch_ops;

	for (i = 0; i < ARRAY_SIZE(ksz9477_switch_chips); i++) {
		const struct ksz_chip_data *chip = &ksz9477_switch_chips[i];

		if (dev->chip_id == chip->chip_id) {
			dev->name = chip->dev_name;
			dev->num_vlans = chip->num_vlans;
			dev->num_alus = chip->num_alus;
			dev->num_statics = chip->num_statics;
			dev->port_cnt = chip->port_cnt;
			dev->cpu_ports = chip->cpu_ports;
			dev->phy_errata_9477 = chip->phy_errata_9477;

			break;
		}
	}

	/* no switch found */
	if (!dev->port_cnt)
		return -ENODEV;

	dev->port_mask = (1 << dev->port_cnt) - 1;

	dev->reg_mib_cnt = SWITCH_COUNTER_NUM;
	dev->mib_cnt = TOTAL_SWITCH_COUNTER_NUM;

	dev->ports = devm_kzalloc(dev->dev,
				  dev->port_cnt * sizeof(struct ksz_port),
				  GFP_KERNEL);
	if (!dev->ports)
		return -ENOMEM;
	for (i = 0; i < dev->port_cnt; i++) {
		mutex_init(&dev->ports[i].mib.cnt_mutex);
		dev->ports[i].mib.counters =
			devm_kzalloc(dev->dev,
				     sizeof(u64) *
				     (TOTAL_SWITCH_COUNTER_NUM + 1),
				     GFP_KERNEL);
		if (!dev->ports[i].mib.counters)
			return -ENOMEM;
	}

	/* set the real number of ports */
	dev->ds->num_ports = dev->port_cnt;

	return 0;
}

static void ksz9477_switch_exit(struct ksz_device *dev)
{
	ksz9477_reset_switch(dev);
}

static const struct ksz_dev_ops ksz9477_dev_ops = {
	.get_port_addr = ksz9477_get_port_addr,
	.cfg_port_member = ksz9477_cfg_port_member,
	.flush_dyn_mac_table = ksz9477_flush_dyn_mac_table,
	.port_setup = ksz9477_port_setup,
	.r_mib_cnt = ksz9477_r_mib_cnt,
	.r_mib_pkt = ksz9477_r_mib_pkt,
	.freeze_mib = ksz9477_freeze_mib,
	.port_init_cnt = ksz9477_port_init_cnt,
	.shutdown = ksz9477_reset_switch,
	.detect = ksz9477_switch_detect,
	.init = ksz9477_switch_init,
	.exit = ksz9477_switch_exit,
};

int ksz9477_switch_register(struct ksz_device *dev)
{
	int ret, i;
	struct phy_device *phydev;

	ret = ksz_switch_register(dev, &ksz9477_dev_ops);
	if (ret)
		return ret;

	for (i = 0; i < dev->phy_port_cnt; ++i) {
		if (!dsa_is_user_port(dev->ds, i))
			continue;

		phydev = dsa_to_port(dev->ds, i)->slave->phydev;

		/* The MAC actually cannot run in 1000 half-duplex mode. */
		phy_remove_link_mode(phydev,
				     ETHTOOL_LINK_MODE_1000baseT_Half_BIT);

		/* PHY does not support gigabit. */
		if (!(dev->features & GBIT_SUPPORT))
			phy_remove_link_mode(phydev,
					     ETHTOOL_LINK_MODE_1000baseT_Full_BIT);
	}
	return ret;
}
EXPORT_SYMBOL(ksz9477_switch_register);

MODULE_AUTHOR("Woojung Huh <Woojung.Huh@microchip.com>");
MODULE_DESCRIPTION("Microchip KSZ9477 Series Switch DSA Driver");
MODULE_LICENSE("GPL");