summaryrefslogtreecommitdiff
path: root/drivers/edac/altera_edac.c
blob: 6037efa94c9bab5e25f493edcaa7c28e1e057423 (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
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
/*
 *  Copyright Altera Corporation (C) 2014-2016. All rights reserved.
 *  Copyright 2011-2012 Calxeda, Inc.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * Adapted from the highbank_mc_edac driver.
 */

#include <asm/cacheflush.h>
#include <linux/ctype.h>
#include <linux/delay.h>
#include <linux/edac.h>
#include <linux/genalloc.h>
#include <linux/interrupt.h>
#include <linux/irqchip/chained_irq.h>
#include <linux/kernel.h>
#include <linux/mfd/syscon.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/types.h>
#include <linux/uaccess.h>

#include "altera_edac.h"
#include "edac_core.h"
#include "edac_module.h"

#define EDAC_MOD_STR		"altera_edac"
#define EDAC_VERSION		"1"
#define EDAC_DEVICE		"Altera"

static const struct altr_sdram_prv_data c5_data = {
	.ecc_ctrl_offset    = CV_CTLCFG_OFST,
	.ecc_ctl_en_mask    = CV_CTLCFG_ECC_AUTO_EN,
	.ecc_stat_offset    = CV_DRAMSTS_OFST,
	.ecc_stat_ce_mask   = CV_DRAMSTS_SBEERR,
	.ecc_stat_ue_mask   = CV_DRAMSTS_DBEERR,
	.ecc_saddr_offset   = CV_ERRADDR_OFST,
	.ecc_daddr_offset   = CV_ERRADDR_OFST,
	.ecc_cecnt_offset   = CV_SBECOUNT_OFST,
	.ecc_uecnt_offset   = CV_DBECOUNT_OFST,
	.ecc_irq_en_offset  = CV_DRAMINTR_OFST,
	.ecc_irq_en_mask    = CV_DRAMINTR_INTREN,
	.ecc_irq_clr_offset = CV_DRAMINTR_OFST,
	.ecc_irq_clr_mask   = (CV_DRAMINTR_INTRCLR | CV_DRAMINTR_INTREN),
	.ecc_cnt_rst_offset = CV_DRAMINTR_OFST,
	.ecc_cnt_rst_mask   = CV_DRAMINTR_INTRCLR,
	.ce_ue_trgr_offset  = CV_CTLCFG_OFST,
	.ce_set_mask        = CV_CTLCFG_GEN_SB_ERR,
	.ue_set_mask        = CV_CTLCFG_GEN_DB_ERR,
};

static const struct altr_sdram_prv_data a10_data = {
	.ecc_ctrl_offset    = A10_ECCCTRL1_OFST,
	.ecc_ctl_en_mask    = A10_ECCCTRL1_ECC_EN,
	.ecc_stat_offset    = A10_INTSTAT_OFST,
	.ecc_stat_ce_mask   = A10_INTSTAT_SBEERR,
	.ecc_stat_ue_mask   = A10_INTSTAT_DBEERR,
	.ecc_saddr_offset   = A10_SERRADDR_OFST,
	.ecc_daddr_offset   = A10_DERRADDR_OFST,
	.ecc_irq_en_offset  = A10_ERRINTEN_OFST,
	.ecc_irq_en_mask    = A10_ECC_IRQ_EN_MASK,
	.ecc_irq_clr_offset = A10_INTSTAT_OFST,
	.ecc_irq_clr_mask   = (A10_INTSTAT_SBEERR | A10_INTSTAT_DBEERR),
	.ecc_cnt_rst_offset = A10_ECCCTRL1_OFST,
	.ecc_cnt_rst_mask   = A10_ECC_CNT_RESET_MASK,
	.ce_ue_trgr_offset  = A10_DIAGINTTEST_OFST,
	.ce_set_mask        = A10_DIAGINT_TSERRA_MASK,
	.ue_set_mask        = A10_DIAGINT_TDERRA_MASK,
};

/*********************** EDAC Memory Controller Functions ****************/

/* The SDRAM controller uses the EDAC Memory Controller framework.       */

static irqreturn_t altr_sdram_mc_err_handler(int irq, void *dev_id)
{
	struct mem_ctl_info *mci = dev_id;
	struct altr_sdram_mc_data *drvdata = mci->pvt_info;
	const struct altr_sdram_prv_data *priv = drvdata->data;
	u32 status, err_count = 1, err_addr;

	regmap_read(drvdata->mc_vbase, priv->ecc_stat_offset, &status);

	if (status & priv->ecc_stat_ue_mask) {
		regmap_read(drvdata->mc_vbase, priv->ecc_daddr_offset,
			    &err_addr);
		if (priv->ecc_uecnt_offset)
			regmap_read(drvdata->mc_vbase, priv->ecc_uecnt_offset,
				    &err_count);
		panic("\nEDAC: [%d Uncorrectable errors @ 0x%08X]\n",
		      err_count, err_addr);
	}
	if (status & priv->ecc_stat_ce_mask) {
		regmap_read(drvdata->mc_vbase, priv->ecc_saddr_offset,
			    &err_addr);
		if (priv->ecc_uecnt_offset)
			regmap_read(drvdata->mc_vbase,  priv->ecc_cecnt_offset,
				    &err_count);
		edac_mc_handle_error(HW_EVENT_ERR_CORRECTED, mci, err_count,
				     err_addr >> PAGE_SHIFT,
				     err_addr & ~PAGE_MASK, 0,
				     0, 0, -1, mci->ctl_name, "");
		/* Clear IRQ to resume */
		regmap_write(drvdata->mc_vbase,	priv->ecc_irq_clr_offset,
			     priv->ecc_irq_clr_mask);

		return IRQ_HANDLED;
	}
	return IRQ_NONE;
}

static ssize_t altr_sdr_mc_err_inject_write(struct file *file,
					    const char __user *data,
					    size_t count, loff_t *ppos)
{
	struct mem_ctl_info *mci = file->private_data;
	struct altr_sdram_mc_data *drvdata = mci->pvt_info;
	const struct altr_sdram_prv_data *priv = drvdata->data;
	u32 *ptemp;
	dma_addr_t dma_handle;
	u32 reg, read_reg;

	ptemp = dma_alloc_coherent(mci->pdev, 16, &dma_handle, GFP_KERNEL);
	if (!ptemp) {
		dma_free_coherent(mci->pdev, 16, ptemp, dma_handle);
		edac_printk(KERN_ERR, EDAC_MC,
			    "Inject: Buffer Allocation error\n");
		return -ENOMEM;
	}

	regmap_read(drvdata->mc_vbase, priv->ce_ue_trgr_offset,
		    &read_reg);
	read_reg &= ~(priv->ce_set_mask | priv->ue_set_mask);

	/* Error are injected by writing a word while the SBE or DBE
	 * bit in the CTLCFG register is set. Reading the word will
	 * trigger the SBE or DBE error and the corresponding IRQ.
	 */
	if (count == 3) {
		edac_printk(KERN_ALERT, EDAC_MC,
			    "Inject Double bit error\n");
		regmap_write(drvdata->mc_vbase, priv->ce_ue_trgr_offset,
			     (read_reg | priv->ue_set_mask));
	} else {
		edac_printk(KERN_ALERT, EDAC_MC,
			    "Inject Single bit error\n");
		regmap_write(drvdata->mc_vbase,	priv->ce_ue_trgr_offset,
			     (read_reg | priv->ce_set_mask));
	}

	ptemp[0] = 0x5A5A5A5A;
	ptemp[1] = 0xA5A5A5A5;

	/* Clear the error injection bits */
	regmap_write(drvdata->mc_vbase,	priv->ce_ue_trgr_offset, read_reg);
	/* Ensure it has been written out */
	wmb();

	/*
	 * To trigger the error, we need to read the data back
	 * (the data was written with errors above).
	 * The ACCESS_ONCE macros and printk are used to prevent the
	 * the compiler optimizing these reads out.
	 */
	reg = ACCESS_ONCE(ptemp[0]);
	read_reg = ACCESS_ONCE(ptemp[1]);
	/* Force Read */
	rmb();

	edac_printk(KERN_ALERT, EDAC_MC, "Read Data [0x%X, 0x%X]\n",
		    reg, read_reg);

	dma_free_coherent(mci->pdev, 16, ptemp, dma_handle);

	return count;
}

static const struct file_operations altr_sdr_mc_debug_inject_fops = {
	.open = simple_open,
	.write = altr_sdr_mc_err_inject_write,
	.llseek = generic_file_llseek,
};

static void altr_sdr_mc_create_debugfs_nodes(struct mem_ctl_info *mci)
{
	if (!IS_ENABLED(CONFIG_EDAC_DEBUG))
		return;

	if (!mci->debugfs)
		return;

	edac_debugfs_create_file("altr_trigger", S_IWUSR, mci->debugfs, mci,
				 &altr_sdr_mc_debug_inject_fops);
}

/* Get total memory size from Open Firmware DTB */
static unsigned long get_total_mem(void)
{
	struct device_node *np = NULL;
	const unsigned int *reg, *reg_end;
	int len, sw, aw;
	unsigned long start, size, total_mem = 0;

	for_each_node_by_type(np, "memory") {
		aw = of_n_addr_cells(np);
		sw = of_n_size_cells(np);
		reg = (const unsigned int *)of_get_property(np, "reg", &len);
		reg_end = reg + (len / sizeof(u32));

		total_mem = 0;
		do {
			start = of_read_number(reg, aw);
			reg += aw;
			size = of_read_number(reg, sw);
			reg += sw;
			total_mem += size;
		} while (reg < reg_end);
	}
	edac_dbg(0, "total_mem 0x%lx\n", total_mem);
	return total_mem;
}

static const struct of_device_id altr_sdram_ctrl_of_match[] = {
	{ .compatible = "altr,sdram-edac", .data = &c5_data},
	{ .compatible = "altr,sdram-edac-a10", .data = &a10_data},
	{},
};
MODULE_DEVICE_TABLE(of, altr_sdram_ctrl_of_match);

static int a10_init(struct regmap *mc_vbase)
{
	if (regmap_update_bits(mc_vbase, A10_INTMODE_OFST,
			       A10_INTMODE_SB_INT, A10_INTMODE_SB_INT)) {
		edac_printk(KERN_ERR, EDAC_MC,
			    "Error setting SB IRQ mode\n");
		return -ENODEV;
	}

	if (regmap_write(mc_vbase, A10_SERRCNTREG_OFST, 1)) {
		edac_printk(KERN_ERR, EDAC_MC,
			    "Error setting trigger count\n");
		return -ENODEV;
	}

	return 0;
}

static int a10_unmask_irq(struct platform_device *pdev, u32 mask)
{
	void __iomem  *sm_base;
	int  ret = 0;

	if (!request_mem_region(A10_SYMAN_INTMASK_CLR, sizeof(u32),
				dev_name(&pdev->dev))) {
		edac_printk(KERN_ERR, EDAC_MC,
			    "Unable to request mem region\n");
		return -EBUSY;
	}

	sm_base = ioremap(A10_SYMAN_INTMASK_CLR, sizeof(u32));
	if (!sm_base) {
		edac_printk(KERN_ERR, EDAC_MC,
			    "Unable to ioremap device\n");

		ret = -ENOMEM;
		goto release;
	}

	iowrite32(mask, sm_base);

	iounmap(sm_base);

release:
	release_mem_region(A10_SYMAN_INTMASK_CLR, sizeof(u32));

	return ret;
}

static int altr_sdram_probe(struct platform_device *pdev)
{
	const struct of_device_id *id;
	struct edac_mc_layer layers[2];
	struct mem_ctl_info *mci;
	struct altr_sdram_mc_data *drvdata;
	const struct altr_sdram_prv_data *priv;
	struct regmap *mc_vbase;
	struct dimm_info *dimm;
	u32 read_reg;
	int irq, irq2, res = 0;
	unsigned long mem_size, irqflags = 0;

	id = of_match_device(altr_sdram_ctrl_of_match, &pdev->dev);
	if (!id)
		return -ENODEV;

	/* Grab the register range from the sdr controller in device tree */
	mc_vbase = syscon_regmap_lookup_by_phandle(pdev->dev.of_node,
						   "altr,sdr-syscon");
	if (IS_ERR(mc_vbase)) {
		edac_printk(KERN_ERR, EDAC_MC,
			    "regmap for altr,sdr-syscon lookup failed.\n");
		return -ENODEV;
	}

	/* Check specific dependencies for the module */
	priv = of_match_node(altr_sdram_ctrl_of_match,
			     pdev->dev.of_node)->data;

	/* Validate the SDRAM controller has ECC enabled */
	if (regmap_read(mc_vbase, priv->ecc_ctrl_offset, &read_reg) ||
	    ((read_reg & priv->ecc_ctl_en_mask) != priv->ecc_ctl_en_mask)) {
		edac_printk(KERN_ERR, EDAC_MC,
			    "No ECC/ECC disabled [0x%08X]\n", read_reg);
		return -ENODEV;
	}

	/* Grab memory size from device tree. */
	mem_size = get_total_mem();
	if (!mem_size) {
		edac_printk(KERN_ERR, EDAC_MC, "Unable to calculate memory size\n");
		return -ENODEV;
	}

	/* Ensure the SDRAM Interrupt is disabled */
	if (regmap_update_bits(mc_vbase, priv->ecc_irq_en_offset,
			       priv->ecc_irq_en_mask, 0)) {
		edac_printk(KERN_ERR, EDAC_MC,
			    "Error disabling SDRAM ECC IRQ\n");
		return -ENODEV;
	}

	/* Toggle to clear the SDRAM Error count */
	if (regmap_update_bits(mc_vbase, priv->ecc_cnt_rst_offset,
			       priv->ecc_cnt_rst_mask,
			       priv->ecc_cnt_rst_mask)) {
		edac_printk(KERN_ERR, EDAC_MC,
			    "Error clearing SDRAM ECC count\n");
		return -ENODEV;
	}

	if (regmap_update_bits(mc_vbase, priv->ecc_cnt_rst_offset,
			       priv->ecc_cnt_rst_mask, 0)) {
		edac_printk(KERN_ERR, EDAC_MC,
			    "Error clearing SDRAM ECC count\n");
		return -ENODEV;
	}

	irq = platform_get_irq(pdev, 0);
	if (irq < 0) {
		edac_printk(KERN_ERR, EDAC_MC,
			    "No irq %d in DT\n", irq);
		return -ENODEV;
	}

	/* Arria10 has a 2nd IRQ */
	irq2 = platform_get_irq(pdev, 1);

	layers[0].type = EDAC_MC_LAYER_CHIP_SELECT;
	layers[0].size = 1;
	layers[0].is_virt_csrow = true;
	layers[1].type = EDAC_MC_LAYER_CHANNEL;
	layers[1].size = 1;
	layers[1].is_virt_csrow = false;
	mci = edac_mc_alloc(0, ARRAY_SIZE(layers), layers,
			    sizeof(struct altr_sdram_mc_data));
	if (!mci)
		return -ENOMEM;

	mci->pdev = &pdev->dev;
	drvdata = mci->pvt_info;
	drvdata->mc_vbase = mc_vbase;
	drvdata->data = priv;
	platform_set_drvdata(pdev, mci);

	if (!devres_open_group(&pdev->dev, NULL, GFP_KERNEL)) {
		edac_printk(KERN_ERR, EDAC_MC,
			    "Unable to get managed device resource\n");
		res = -ENOMEM;
		goto free;
	}

	mci->mtype_cap = MEM_FLAG_DDR3;
	mci->edac_ctl_cap = EDAC_FLAG_NONE | EDAC_FLAG_SECDED;
	mci->edac_cap = EDAC_FLAG_SECDED;
	mci->mod_name = EDAC_MOD_STR;
	mci->mod_ver = EDAC_VERSION;
	mci->ctl_name = dev_name(&pdev->dev);
	mci->scrub_mode = SCRUB_SW_SRC;
	mci->dev_name = dev_name(&pdev->dev);

	dimm = *mci->dimms;
	dimm->nr_pages = ((mem_size - 1) >> PAGE_SHIFT) + 1;
	dimm->grain = 8;
	dimm->dtype = DEV_X8;
	dimm->mtype = MEM_DDR3;
	dimm->edac_mode = EDAC_SECDED;

	res = edac_mc_add_mc(mci);
	if (res < 0)
		goto err;

	/* Only the Arria10 has separate IRQs */
	if (irq2 > 0) {
		/* Arria10 specific initialization */
		res = a10_init(mc_vbase);
		if (res < 0)
			goto err2;

		res = devm_request_irq(&pdev->dev, irq2,
				       altr_sdram_mc_err_handler,
				       IRQF_SHARED, dev_name(&pdev->dev), mci);
		if (res < 0) {
			edac_mc_printk(mci, KERN_ERR,
				       "Unable to request irq %d\n", irq2);
			res = -ENODEV;
			goto err2;
		}

		res = a10_unmask_irq(pdev, A10_DDR0_IRQ_MASK);
		if (res < 0)
			goto err2;

		irqflags = IRQF_SHARED;
	}

	res = devm_request_irq(&pdev->dev, irq, altr_sdram_mc_err_handler,
			       irqflags, dev_name(&pdev->dev), mci);
	if (res < 0) {
		edac_mc_printk(mci, KERN_ERR,
			       "Unable to request irq %d\n", irq);
		res = -ENODEV;
		goto err2;
	}

	/* Infrastructure ready - enable the IRQ */
	if (regmap_update_bits(drvdata->mc_vbase, priv->ecc_irq_en_offset,
			       priv->ecc_irq_en_mask, priv->ecc_irq_en_mask)) {
		edac_mc_printk(mci, KERN_ERR,
			       "Error enabling SDRAM ECC IRQ\n");
		res = -ENODEV;
		goto err2;
	}

	altr_sdr_mc_create_debugfs_nodes(mci);

	devres_close_group(&pdev->dev, NULL);

	return 0;

err2:
	edac_mc_del_mc(&pdev->dev);
err:
	devres_release_group(&pdev->dev, NULL);
free:
	edac_mc_free(mci);
	edac_printk(KERN_ERR, EDAC_MC,
		    "EDAC Probe Failed; Error %d\n", res);

	return res;
}

static int altr_sdram_remove(struct platform_device *pdev)
{
	struct mem_ctl_info *mci = platform_get_drvdata(pdev);

	edac_mc_del_mc(&pdev->dev);
	edac_mc_free(mci);
	platform_set_drvdata(pdev, NULL);

	return 0;
}

/*
 * If you want to suspend, need to disable EDAC by removing it
 * from the device tree or defconfig.
 */
#ifdef CONFIG_PM
static int altr_sdram_prepare(struct device *dev)
{
	pr_err("Suspend not allowed when EDAC is enabled.\n");

	return -EPERM;
}

static const struct dev_pm_ops altr_sdram_pm_ops = {
	.prepare = altr_sdram_prepare,
};
#endif

static struct platform_driver altr_sdram_edac_driver = {
	.probe = altr_sdram_probe,
	.remove = altr_sdram_remove,
	.driver = {
		.name = "altr_sdram_edac",
#ifdef CONFIG_PM
		.pm = &altr_sdram_pm_ops,
#endif
		.of_match_table = altr_sdram_ctrl_of_match,
	},
};

module_platform_driver(altr_sdram_edac_driver);

/************************* EDAC Parent Probe *************************/

static const struct of_device_id altr_edac_device_of_match[];

static const struct of_device_id altr_edac_of_match[] = {
	{ .compatible = "altr,socfpga-ecc-manager" },
	{},
};
MODULE_DEVICE_TABLE(of, altr_edac_of_match);

static int altr_edac_probe(struct platform_device *pdev)
{
	of_platform_populate(pdev->dev.of_node, altr_edac_device_of_match,
			     NULL, &pdev->dev);
	return 0;
}

static struct platform_driver altr_edac_driver = {
	.probe =  altr_edac_probe,
	.driver = {
		.name = "socfpga_ecc_manager",
		.of_match_table = altr_edac_of_match,
	},
};
module_platform_driver(altr_edac_driver);

/************************* EDAC Device Functions *************************/

/*
 * EDAC Device Functions (shared between various IPs).
 * The discrete memories use the EDAC Device framework. The probe
 * and error handling functions are very similar between memories
 * so they are shared. The memory allocation and freeing for EDAC
 * trigger testing are different for each memory.
 */

static const struct edac_device_prv_data ocramecc_data;
static const struct edac_device_prv_data l2ecc_data;
static const struct edac_device_prv_data a10_ocramecc_data;
static const struct edac_device_prv_data a10_l2ecc_data;

static irqreturn_t altr_edac_device_handler(int irq, void *dev_id)
{
	irqreturn_t ret_value = IRQ_NONE;
	struct edac_device_ctl_info *dci = dev_id;
	struct altr_edac_device_dev *drvdata = dci->pvt_info;
	const struct edac_device_prv_data *priv = drvdata->data;

	if (irq == drvdata->sb_irq) {
		if (priv->ce_clear_mask)
			writel(priv->ce_clear_mask, drvdata->base);
		edac_device_handle_ce(dci, 0, 0, drvdata->edac_dev_name);
		ret_value = IRQ_HANDLED;
	} else if (irq == drvdata->db_irq) {
		if (priv->ue_clear_mask)
			writel(priv->ue_clear_mask, drvdata->base);
		edac_device_handle_ue(dci, 0, 0, drvdata->edac_dev_name);
		panic("\nEDAC:ECC_DEVICE[Uncorrectable errors]\n");
		ret_value = IRQ_HANDLED;
	} else {
		WARN_ON(1);
	}

	return ret_value;
}

static ssize_t altr_edac_device_trig(struct file *file,
				     const char __user *user_buf,
				     size_t count, loff_t *ppos)

{
	u32 *ptemp, i, error_mask;
	int result = 0;
	u8 trig_type;
	unsigned long flags;
	struct edac_device_ctl_info *edac_dci = file->private_data;
	struct altr_edac_device_dev *drvdata = edac_dci->pvt_info;
	const struct edac_device_prv_data *priv = drvdata->data;
	void *generic_ptr = edac_dci->dev;

	if (!user_buf || get_user(trig_type, user_buf))
		return -EFAULT;

	if (!priv->alloc_mem)
		return -ENOMEM;

	/*
	 * Note that generic_ptr is initialized to the device * but in
	 * some alloc_functions, this is overridden and returns data.
	 */
	ptemp = priv->alloc_mem(priv->trig_alloc_sz, &generic_ptr);
	if (!ptemp) {
		edac_printk(KERN_ERR, EDAC_DEVICE,
			    "Inject: Buffer Allocation error\n");
		return -ENOMEM;
	}

	if (trig_type == ALTR_UE_TRIGGER_CHAR)
		error_mask = priv->ue_set_mask;
	else
		error_mask = priv->ce_set_mask;

	edac_printk(KERN_ALERT, EDAC_DEVICE,
		    "Trigger Error Mask (0x%X)\n", error_mask);

	local_irq_save(flags);
	/* write ECC corrupted data out. */
	for (i = 0; i < (priv->trig_alloc_sz / sizeof(*ptemp)); i++) {
		/* Read data so we're in the correct state */
		rmb();
		if (ACCESS_ONCE(ptemp[i]))
			result = -1;
		/* Toggle Error bit (it is latched), leave ECC enabled */
		writel(error_mask, (drvdata->base + priv->set_err_ofst));
		writel(priv->ecc_enable_mask, (drvdata->base +
					       priv->set_err_ofst));
		ptemp[i] = i;
	}
	/* Ensure it has been written out */
	wmb();
	local_irq_restore(flags);

	if (result)
		edac_printk(KERN_ERR, EDAC_DEVICE, "Mem Not Cleared\n");

	/* Read out written data. ECC error caused here */
	for (i = 0; i < ALTR_TRIGGER_READ_WRD_CNT; i++)
		if (ACCESS_ONCE(ptemp[i]) != i)
			edac_printk(KERN_ERR, EDAC_DEVICE,
				    "Read doesn't match written data\n");

	if (priv->free_mem)
		priv->free_mem(ptemp, priv->trig_alloc_sz, generic_ptr);

	return count;
}

static const struct file_operations altr_edac_device_inject_fops = {
	.open = simple_open,
	.write = altr_edac_device_trig,
	.llseek = generic_file_llseek,
};

static ssize_t altr_edac_a10_device_trig(struct file *file,
					 const char __user *user_buf,
					 size_t count, loff_t *ppos);

static const struct file_operations altr_edac_a10_device_inject_fops = {
	.open = simple_open,
	.write = altr_edac_a10_device_trig,
	.llseek = generic_file_llseek,
};

static void altr_create_edacdev_dbgfs(struct edac_device_ctl_info *edac_dci,
				      const struct edac_device_prv_data *priv)
{
	struct altr_edac_device_dev *drvdata = edac_dci->pvt_info;

	if (!IS_ENABLED(CONFIG_EDAC_DEBUG))
		return;

	drvdata->debugfs_dir = edac_debugfs_create_dir(drvdata->edac_dev_name);
	if (!drvdata->debugfs_dir)
		return;

	if (!edac_debugfs_create_file("altr_trigger", S_IWUSR,
				      drvdata->debugfs_dir, edac_dci,
				      priv->inject_fops))
		debugfs_remove_recursive(drvdata->debugfs_dir);
}

static const struct of_device_id altr_edac_device_of_match[] = {
#ifdef CONFIG_EDAC_ALTERA_L2C
	{ .compatible = "altr,socfpga-l2-ecc", .data = &l2ecc_data },
#endif
#ifdef CONFIG_EDAC_ALTERA_OCRAM
	{ .compatible = "altr,socfpga-ocram-ecc", .data = &ocramecc_data },
#endif
	{},
};
MODULE_DEVICE_TABLE(of, altr_edac_device_of_match);

/*
 * altr_edac_device_probe()
 *	This is a generic EDAC device driver that will support
 *	various Altera memory devices such as the L2 cache ECC and
 *	OCRAM ECC as well as the memories for other peripherals.
 *	Module specific initialization is done by passing the
 *	function index in the device tree.
 */
static int altr_edac_device_probe(struct platform_device *pdev)
{
	struct edac_device_ctl_info *dci;
	struct altr_edac_device_dev *drvdata;
	struct resource *r;
	int res = 0;
	struct device_node *np = pdev->dev.of_node;
	char *ecc_name = (char *)np->name;
	static int dev_instance;

	if (!devres_open_group(&pdev->dev, NULL, GFP_KERNEL)) {
		edac_printk(KERN_ERR, EDAC_DEVICE,
			    "Unable to open devm\n");
		return -ENOMEM;
	}

	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!r) {
		edac_printk(KERN_ERR, EDAC_DEVICE,
			    "Unable to get mem resource\n");
		res = -ENODEV;
		goto fail;
	}

	if (!devm_request_mem_region(&pdev->dev, r->start, resource_size(r),
				     dev_name(&pdev->dev))) {
		edac_printk(KERN_ERR, EDAC_DEVICE,
			    "%s:Error requesting mem region\n", ecc_name);
		res = -EBUSY;
		goto fail;
	}

	dci = edac_device_alloc_ctl_info(sizeof(*drvdata), ecc_name,
					 1, ecc_name, 1, 0, NULL, 0,
					 dev_instance++);

	if (!dci) {
		edac_printk(KERN_ERR, EDAC_DEVICE,
			    "%s: Unable to allocate EDAC device\n", ecc_name);
		res = -ENOMEM;
		goto fail;
	}

	drvdata = dci->pvt_info;
	dci->dev = &pdev->dev;
	platform_set_drvdata(pdev, dci);
	drvdata->edac_dev_name = ecc_name;

	drvdata->base = devm_ioremap(&pdev->dev, r->start, resource_size(r));
	if (!drvdata->base)
		goto fail1;

	/* Get driver specific data for this EDAC device */
	drvdata->data = of_match_node(altr_edac_device_of_match, np)->data;

	/* Check specific dependencies for the module */
	if (drvdata->data->setup) {
		res = drvdata->data->setup(drvdata);
		if (res)
			goto fail1;
	}

	drvdata->sb_irq = platform_get_irq(pdev, 0);
	res = devm_request_irq(&pdev->dev, drvdata->sb_irq,
			       altr_edac_device_handler,
			       0, dev_name(&pdev->dev), dci);
	if (res)
		goto fail1;

	drvdata->db_irq = platform_get_irq(pdev, 1);
	res = devm_request_irq(&pdev->dev, drvdata->db_irq,
			       altr_edac_device_handler,
			       0, dev_name(&pdev->dev), dci);
	if (res)
		goto fail1;

	dci->mod_name = "Altera ECC Manager";
	dci->dev_name = drvdata->edac_dev_name;

	res = edac_device_add_device(dci);
	if (res)
		goto fail1;

	altr_create_edacdev_dbgfs(dci, drvdata->data);

	devres_close_group(&pdev->dev, NULL);

	return 0;

fail1:
	edac_device_free_ctl_info(dci);
fail:
	devres_release_group(&pdev->dev, NULL);
	edac_printk(KERN_ERR, EDAC_DEVICE,
		    "%s:Error setting up EDAC device: %d\n", ecc_name, res);

	return res;
}

static int altr_edac_device_remove(struct platform_device *pdev)
{
	struct edac_device_ctl_info *dci = platform_get_drvdata(pdev);
	struct altr_edac_device_dev *drvdata = dci->pvt_info;

	debugfs_remove_recursive(drvdata->debugfs_dir);
	edac_device_del_device(&pdev->dev);
	edac_device_free_ctl_info(dci);

	return 0;
}

static struct platform_driver altr_edac_device_driver = {
	.probe =  altr_edac_device_probe,
	.remove = altr_edac_device_remove,
	.driver = {
		.name = "altr_edac_device",
		.of_match_table = altr_edac_device_of_match,
	},
};
module_platform_driver(altr_edac_device_driver);

/******************* Arria10 Device ECC Shared Functions *****************/

/*
 *  Test for memory's ECC dependencies upon entry because platform specific
 *  startup should have initialized the memory and enabled the ECC.
 *  Can't turn on ECC here because accessing un-initialized memory will
 *  cause CE/UE errors possibly causing an ABORT.
 */
static int __maybe_unused
altr_check_ecc_deps(struct altr_edac_device_dev *device)
{
	void __iomem  *base = device->base;
	const struct edac_device_prv_data *prv = device->data;

	if (readl(base + prv->ecc_en_ofst) & prv->ecc_enable_mask)
		return 0;

	edac_printk(KERN_ERR, EDAC_DEVICE,
		    "%s: No ECC present or ECC disabled.\n",
		    device->edac_dev_name);
	return -ENODEV;
}

static irqreturn_t __maybe_unused altr_edac_a10_ecc_irq(int irq, void *dev_id)
{
	struct altr_edac_device_dev *dci = dev_id;
	void __iomem  *base = dci->base;

	if (irq == dci->sb_irq) {
		writel(ALTR_A10_ECC_SERRPENA,
		       base + ALTR_A10_ECC_INTSTAT_OFST);
		edac_device_handle_ce(dci->edac_dev, 0, 0, dci->edac_dev_name);

		return IRQ_HANDLED;
	} else if (irq == dci->db_irq) {
		writel(ALTR_A10_ECC_DERRPENA,
		       base + ALTR_A10_ECC_INTSTAT_OFST);
		edac_device_handle_ue(dci->edac_dev, 0, 0, dci->edac_dev_name);
		if (dci->data->panic)
			panic("\nEDAC:ECC_DEVICE[Uncorrectable errors]\n");

		return IRQ_HANDLED;
	}

	WARN_ON(1);

	return IRQ_NONE;
}

/******************* Arria10 Memory Buffer Functions *********************/

static inline int a10_get_irq_mask(struct device_node *np)
{
	int irq;
	const u32 *handle = of_get_property(np, "interrupts", NULL);

	if (!handle)
		return -ENODEV;
	irq = be32_to_cpup(handle);
	return irq;
}

static inline void ecc_set_bits(u32 bit_mask, void __iomem *ioaddr)
{
	u32 value = readl(ioaddr);

	value |= bit_mask;
	writel(value, ioaddr);
}

static inline void ecc_clear_bits(u32 bit_mask, void __iomem *ioaddr)
{
	u32 value = readl(ioaddr);

	value &= ~bit_mask;
	writel(value, ioaddr);
}

static inline int ecc_test_bits(u32 bit_mask, void __iomem *ioaddr)
{
	u32 value = readl(ioaddr);

	return (value & bit_mask) ? 1 : 0;
}

/*
 * This function uses the memory initialization block in the Arria10 ECC
 * controller to initialize/clear the entire memory data and ECC data.
 */
static int __maybe_unused altr_init_memory_port(void __iomem *ioaddr, int port)
{
	int limit = ALTR_A10_ECC_INIT_WATCHDOG_10US;
	u32 init_mask, stat_mask, clear_mask;
	int ret = 0;

	if (port) {
		init_mask = ALTR_A10_ECC_INITB;
		stat_mask = ALTR_A10_ECC_INITCOMPLETEB;
		clear_mask = ALTR_A10_ECC_ERRPENB_MASK;
	} else {
		init_mask = ALTR_A10_ECC_INITA;
		stat_mask = ALTR_A10_ECC_INITCOMPLETEA;
		clear_mask = ALTR_A10_ECC_ERRPENA_MASK;
	}

	ecc_set_bits(init_mask, (ioaddr + ALTR_A10_ECC_CTRL_OFST));
	while (limit--) {
		if (ecc_test_bits(stat_mask,
				  (ioaddr + ALTR_A10_ECC_INITSTAT_OFST)))
			break;
		udelay(1);
	}
	if (limit < 0)
		ret = -EBUSY;

	/* Clear any pending ECC interrupts */
	writel(clear_mask, (ioaddr + ALTR_A10_ECC_INTSTAT_OFST));

	return ret;
}

static __init int __maybe_unused
altr_init_a10_ecc_block(struct device_node *np, u32 irq_mask,
			u32 ecc_ctrl_en_mask, bool dual_port)
{
	int ret = 0;
	void __iomem *ecc_block_base;
	struct regmap *ecc_mgr_map;
	char *ecc_name;
	struct device_node *np_eccmgr;

	ecc_name = (char *)np->name;

	/* Get the ECC Manager - parent of the device EDACs */
	np_eccmgr = of_get_parent(np);
	ecc_mgr_map = syscon_regmap_lookup_by_phandle(np_eccmgr,
						      "altr,sysmgr-syscon");
	of_node_put(np_eccmgr);
	if (IS_ERR(ecc_mgr_map)) {
		edac_printk(KERN_ERR, EDAC_DEVICE,
			    "Unable to get syscon altr,sysmgr-syscon\n");
		return -ENODEV;
	}

	/* Map the ECC Block */
	ecc_block_base = of_iomap(np, 0);
	if (!ecc_block_base) {
		edac_printk(KERN_ERR, EDAC_DEVICE,
			    "Unable to map %s ECC block\n", ecc_name);
		return -ENODEV;
	}

	/* Disable ECC */
	regmap_write(ecc_mgr_map, A10_SYSMGR_ECC_INTMASK_SET_OFST, irq_mask);
	writel(ALTR_A10_ECC_SERRINTEN,
	       (ecc_block_base + ALTR_A10_ECC_ERRINTENR_OFST));
	ecc_clear_bits(ecc_ctrl_en_mask,
		       (ecc_block_base + ALTR_A10_ECC_CTRL_OFST));
	/* Ensure all writes complete */
	wmb();
	/* Use HW initialization block to initialize memory for ECC */
	ret = altr_init_memory_port(ecc_block_base, 0);
	if (ret) {
		edac_printk(KERN_ERR, EDAC_DEVICE,
			    "ECC: cannot init %s PORTA memory\n", ecc_name);
		goto out;
	}

	if (dual_port) {
		ret = altr_init_memory_port(ecc_block_base, 1);
		if (ret) {
			edac_printk(KERN_ERR, EDAC_DEVICE,
				    "ECC: cannot init %s PORTB memory\n",
				    ecc_name);
			goto out;
		}
	}

	/* Interrupt mode set to every SBERR */
	regmap_write(ecc_mgr_map, ALTR_A10_ECC_INTMODE_OFST,
		     ALTR_A10_ECC_INTMODE);
	/* Enable ECC */
	ecc_set_bits(ecc_ctrl_en_mask, (ecc_block_base +
					ALTR_A10_ECC_CTRL_OFST));
	writel(ALTR_A10_ECC_SERRINTEN,
	       (ecc_block_base + ALTR_A10_ECC_ERRINTENS_OFST));
	regmap_write(ecc_mgr_map, A10_SYSMGR_ECC_INTMASK_CLR_OFST, irq_mask);
	/* Ensure all writes complete */
	wmb();
out:
	iounmap(ecc_block_base);
	return ret;
}

static int socfpga_is_a10(void)
{
	return of_machine_is_compatible("altr,socfpga-arria10");
}

static int validate_parent_available(struct device_node *np);
static const struct of_device_id altr_edac_a10_device_of_match[];
static int __init __maybe_unused altr_init_a10_ecc_device_type(char *compat)
{
	int irq;
	struct device_node *child, *np;

	if (!socfpga_is_a10())
		return -ENODEV;

	np = of_find_compatible_node(NULL, NULL,
				     "altr,socfpga-a10-ecc-manager");
	if (!np) {
		edac_printk(KERN_ERR, EDAC_DEVICE, "ECC Manager not found\n");
		return -ENODEV;
	}

	for_each_child_of_node(np, child) {
		const struct of_device_id *pdev_id;
		const struct edac_device_prv_data *prv;

		if (!of_device_is_available(child))
			continue;
		if (!of_device_is_compatible(child, compat))
			continue;

		if (validate_parent_available(child))
			continue;

		irq = a10_get_irq_mask(child);
		if (irq < 0)
			continue;

		/* Get matching node and check for valid result */
		pdev_id = of_match_node(altr_edac_a10_device_of_match, child);
		if (IS_ERR_OR_NULL(pdev_id))
			continue;

		/* Validate private data pointer before dereferencing */
		prv = pdev_id->data;
		if (!prv)
			continue;

		altr_init_a10_ecc_block(child, BIT(irq),
					prv->ecc_enable_mask, 0);
	}

	of_node_put(np);
	return 0;
}

/*********************** OCRAM EDAC Device Functions *********************/

#ifdef CONFIG_EDAC_ALTERA_OCRAM

static void *ocram_alloc_mem(size_t size, void **other)
{
	struct device_node *np;
	struct gen_pool *gp;
	void *sram_addr;

	np = of_find_compatible_node(NULL, NULL, "altr,socfpga-ocram-ecc");
	if (!np)
		return NULL;

	gp = of_gen_pool_get(np, "iram", 0);
	of_node_put(np);
	if (!gp)
		return NULL;

	sram_addr = (void *)gen_pool_alloc(gp, size);
	if (!sram_addr)
		return NULL;

	memset(sram_addr, 0, size);
	/* Ensure data is written out */
	wmb();

	/* Remember this handle for freeing  later */
	*other = gp;

	return sram_addr;
}

static void ocram_free_mem(void *p, size_t size, void *other)
{
	gen_pool_free((struct gen_pool *)other, (unsigned long)p, size);
}

static const struct edac_device_prv_data ocramecc_data = {
	.setup = altr_check_ecc_deps,
	.ce_clear_mask = (ALTR_OCR_ECC_EN | ALTR_OCR_ECC_SERR),
	.ue_clear_mask = (ALTR_OCR_ECC_EN | ALTR_OCR_ECC_DERR),
	.alloc_mem = ocram_alloc_mem,
	.free_mem = ocram_free_mem,
	.ecc_enable_mask = ALTR_OCR_ECC_EN,
	.ecc_en_ofst = ALTR_OCR_ECC_REG_OFFSET,
	.ce_set_mask = (ALTR_OCR_ECC_EN | ALTR_OCR_ECC_INJS),
	.ue_set_mask = (ALTR_OCR_ECC_EN | ALTR_OCR_ECC_INJD),
	.set_err_ofst = ALTR_OCR_ECC_REG_OFFSET,
	.trig_alloc_sz = ALTR_TRIG_OCRAM_BYTE_SIZE,
	.inject_fops = &altr_edac_device_inject_fops,
};

static const struct edac_device_prv_data a10_ocramecc_data = {
	.setup = altr_check_ecc_deps,
	.ce_clear_mask = ALTR_A10_ECC_SERRPENA,
	.ue_clear_mask = ALTR_A10_ECC_DERRPENA,
	.irq_status_mask = A10_SYSMGR_ECC_INTSTAT_OCRAM,
	.ecc_enable_mask = ALTR_A10_OCRAM_ECC_EN_CTL,
	.ecc_en_ofst = ALTR_A10_ECC_CTRL_OFST,
	.ce_set_mask = ALTR_A10_ECC_TSERRA,
	.ue_set_mask = ALTR_A10_ECC_TDERRA,
	.set_err_ofst = ALTR_A10_ECC_INTTEST_OFST,
	.ecc_irq_handler = altr_edac_a10_ecc_irq,
	.inject_fops = &altr_edac_a10_device_inject_fops,
	/*
	 * OCRAM panic on uncorrectable error because sleep/resume
	 * functions and FPGA contents are stored in OCRAM. Prefer
	 * a kernel panic over executing/loading corrupted data.
	 */
	.panic = true,
};

#endif	/* CONFIG_EDAC_ALTERA_OCRAM */

/********************* L2 Cache EDAC Device Functions ********************/

#ifdef CONFIG_EDAC_ALTERA_L2C

static void *l2_alloc_mem(size_t size, void **other)
{
	struct device *dev = *other;
	void *ptemp = devm_kzalloc(dev, size, GFP_KERNEL);

	if (!ptemp)
		return NULL;

	/* Make sure everything is written out */
	wmb();

	/*
	 * Clean all cache levels up to LoC (includes L2)
	 * This ensures the corrupted data is written into
	 * L2 cache for readback test (which causes ECC error).
	 */
	flush_cache_all();

	return ptemp;
}

static void l2_free_mem(void *p, size_t size, void *other)
{
	struct device *dev = other;

	if (dev && p)
		devm_kfree(dev, p);
}

/*
 * altr_l2_check_deps()
 *	Test for L2 cache ECC dependencies upon entry because
 *	platform specific startup should have initialized the L2
 *	memory and enabled the ECC.
 *	Bail if ECC is not enabled.
 *	Note that L2 Cache Enable is forced at build time.
 */
static int altr_l2_check_deps(struct altr_edac_device_dev *device)
{
	void __iomem *base = device->base;
	const struct edac_device_prv_data *prv = device->data;

	if ((readl(base) & prv->ecc_enable_mask) ==
	     prv->ecc_enable_mask)
		return 0;

	edac_printk(KERN_ERR, EDAC_DEVICE,
		    "L2: No ECC present, or ECC disabled\n");
	return -ENODEV;
}

static irqreturn_t altr_edac_a10_l2_irq(int irq, void *dev_id)
{
	struct altr_edac_device_dev *dci = dev_id;

	if (irq == dci->sb_irq) {
		regmap_write(dci->edac->ecc_mgr_map,
			     A10_SYSGMR_MPU_CLEAR_L2_ECC_OFST,
			     A10_SYSGMR_MPU_CLEAR_L2_ECC_SB);
		edac_device_handle_ce(dci->edac_dev, 0, 0, dci->edac_dev_name);

		return IRQ_HANDLED;
	} else if (irq == dci->db_irq) {
		regmap_write(dci->edac->ecc_mgr_map,
			     A10_SYSGMR_MPU_CLEAR_L2_ECC_OFST,
			     A10_SYSGMR_MPU_CLEAR_L2_ECC_MB);
		edac_device_handle_ue(dci->edac_dev, 0, 0, dci->edac_dev_name);
		panic("\nEDAC:ECC_DEVICE[Uncorrectable errors]\n");

		return IRQ_HANDLED;
	}

	WARN_ON(1);

	return IRQ_NONE;
}

static const struct edac_device_prv_data l2ecc_data = {
	.setup = altr_l2_check_deps,
	.ce_clear_mask = 0,
	.ue_clear_mask = 0,
	.alloc_mem = l2_alloc_mem,
	.free_mem = l2_free_mem,
	.ecc_enable_mask = ALTR_L2_ECC_EN,
	.ce_set_mask = (ALTR_L2_ECC_EN | ALTR_L2_ECC_INJS),
	.ue_set_mask = (ALTR_L2_ECC_EN | ALTR_L2_ECC_INJD),
	.set_err_ofst = ALTR_L2_ECC_REG_OFFSET,
	.trig_alloc_sz = ALTR_TRIG_L2C_BYTE_SIZE,
	.inject_fops = &altr_edac_device_inject_fops,
};

static const struct edac_device_prv_data a10_l2ecc_data = {
	.setup = altr_l2_check_deps,
	.ce_clear_mask = ALTR_A10_L2_ECC_SERR_CLR,
	.ue_clear_mask = ALTR_A10_L2_ECC_MERR_CLR,
	.irq_status_mask = A10_SYSMGR_ECC_INTSTAT_L2,
	.alloc_mem = l2_alloc_mem,
	.free_mem = l2_free_mem,
	.ecc_enable_mask = ALTR_A10_L2_ECC_EN_CTL,
	.ce_set_mask = ALTR_A10_L2_ECC_CE_INJ_MASK,
	.ue_set_mask = ALTR_A10_L2_ECC_UE_INJ_MASK,
	.set_err_ofst = ALTR_A10_L2_ECC_INJ_OFST,
	.ecc_irq_handler = altr_edac_a10_l2_irq,
	.trig_alloc_sz = ALTR_TRIG_L2C_BYTE_SIZE,
	.inject_fops = &altr_edac_device_inject_fops,
};

#endif	/* CONFIG_EDAC_ALTERA_L2C */

/********************* Ethernet Device Functions ********************/

#ifdef CONFIG_EDAC_ALTERA_ETHERNET

static const struct edac_device_prv_data a10_enetecc_data = {
	.setup = altr_check_ecc_deps,
	.ce_clear_mask = ALTR_A10_ECC_SERRPENA,
	.ue_clear_mask = ALTR_A10_ECC_DERRPENA,
	.ecc_enable_mask = ALTR_A10_COMMON_ECC_EN_CTL,
	.ecc_en_ofst = ALTR_A10_ECC_CTRL_OFST,
	.ce_set_mask = ALTR_A10_ECC_TSERRA,
	.ue_set_mask = ALTR_A10_ECC_TDERRA,
	.set_err_ofst = ALTR_A10_ECC_INTTEST_OFST,
	.ecc_irq_handler = altr_edac_a10_ecc_irq,
	.inject_fops = &altr_edac_a10_device_inject_fops,
};

static int __init socfpga_init_ethernet_ecc(void)
{
	return altr_init_a10_ecc_device_type("altr,socfpga-eth-mac-ecc");
}

early_initcall(socfpga_init_ethernet_ecc);

#endif	/* CONFIG_EDAC_ALTERA_ETHERNET */

/********************** NAND Device Functions **********************/

#ifdef CONFIG_EDAC_ALTERA_NAND

static const struct edac_device_prv_data a10_nandecc_data = {
	.setup = altr_check_ecc_deps,
	.ce_clear_mask = ALTR_A10_ECC_SERRPENA,
	.ue_clear_mask = ALTR_A10_ECC_DERRPENA,
	.ecc_enable_mask = ALTR_A10_COMMON_ECC_EN_CTL,
	.ecc_en_ofst = ALTR_A10_ECC_CTRL_OFST,
	.ce_set_mask = ALTR_A10_ECC_TSERRA,
	.ue_set_mask = ALTR_A10_ECC_TDERRA,
	.set_err_ofst = ALTR_A10_ECC_INTTEST_OFST,
	.ecc_irq_handler = altr_edac_a10_ecc_irq,
	.inject_fops = &altr_edac_a10_device_inject_fops,
};

static int __init socfpga_init_nand_ecc(void)
{
	return altr_init_a10_ecc_device_type("altr,socfpga-nand-ecc");
}

early_initcall(socfpga_init_nand_ecc);

#endif	/* CONFIG_EDAC_ALTERA_NAND */

/********************** DMA Device Functions **********************/

#ifdef CONFIG_EDAC_ALTERA_DMA

static const struct edac_device_prv_data a10_dmaecc_data = {
	.setup = altr_check_ecc_deps,
	.ce_clear_mask = ALTR_A10_ECC_SERRPENA,
	.ue_clear_mask = ALTR_A10_ECC_DERRPENA,
	.ecc_enable_mask = ALTR_A10_COMMON_ECC_EN_CTL,
	.ecc_en_ofst = ALTR_A10_ECC_CTRL_OFST,
	.ce_set_mask = ALTR_A10_ECC_TSERRA,
	.ue_set_mask = ALTR_A10_ECC_TDERRA,
	.set_err_ofst = ALTR_A10_ECC_INTTEST_OFST,
	.ecc_irq_handler = altr_edac_a10_ecc_irq,
	.inject_fops = &altr_edac_a10_device_inject_fops,
};

static int __init socfpga_init_dma_ecc(void)
{
	return altr_init_a10_ecc_device_type("altr,socfpga-dma-ecc");
}

early_initcall(socfpga_init_dma_ecc);

#endif	/* CONFIG_EDAC_ALTERA_DMA */

/********************** USB Device Functions **********************/

#ifdef CONFIG_EDAC_ALTERA_USB

static const struct edac_device_prv_data a10_usbecc_data = {
	.setup = altr_check_ecc_deps,
	.ce_clear_mask = ALTR_A10_ECC_SERRPENA,
	.ue_clear_mask = ALTR_A10_ECC_DERRPENA,
	.ecc_enable_mask = ALTR_A10_COMMON_ECC_EN_CTL,
	.ecc_en_ofst = ALTR_A10_ECC_CTRL_OFST,
	.ce_set_mask = ALTR_A10_ECC_TSERRA,
	.ue_set_mask = ALTR_A10_ECC_TDERRA,
	.set_err_ofst = ALTR_A10_ECC_INTTEST_OFST,
	.ecc_irq_handler = altr_edac_a10_ecc_irq,
	.inject_fops = &altr_edac_a10_device_inject_fops,
};

static int __init socfpga_init_usb_ecc(void)
{
	return altr_init_a10_ecc_device_type("altr,socfpga-usb-ecc");
}

early_initcall(socfpga_init_usb_ecc);

#endif	/* CONFIG_EDAC_ALTERA_USB */

/********************** QSPI Device Functions **********************/

#ifdef CONFIG_EDAC_ALTERA_QSPI

static const struct edac_device_prv_data a10_qspiecc_data = {
	.setup = altr_check_ecc_deps,
	.ce_clear_mask = ALTR_A10_ECC_SERRPENA,
	.ue_clear_mask = ALTR_A10_ECC_DERRPENA,
	.ecc_enable_mask = ALTR_A10_COMMON_ECC_EN_CTL,
	.ecc_en_ofst = ALTR_A10_ECC_CTRL_OFST,
	.ce_set_mask = ALTR_A10_ECC_TSERRA,
	.ue_set_mask = ALTR_A10_ECC_TDERRA,
	.set_err_ofst = ALTR_A10_ECC_INTTEST_OFST,
	.ecc_irq_handler = altr_edac_a10_ecc_irq,
	.inject_fops = &altr_edac_a10_device_inject_fops,
};

static int __init socfpga_init_qspi_ecc(void)
{
	return altr_init_a10_ecc_device_type("altr,socfpga-qspi-ecc");
}

early_initcall(socfpga_init_qspi_ecc);

#endif	/* CONFIG_EDAC_ALTERA_QSPI */

/********************* SDMMC Device Functions **********************/

#ifdef CONFIG_EDAC_ALTERA_SDMMC

static const struct edac_device_prv_data a10_sdmmceccb_data;
static int altr_portb_setup(struct altr_edac_device_dev *device)
{
	struct edac_device_ctl_info *dci;
	struct altr_edac_device_dev *altdev;
	char *ecc_name = "sdmmcb-ecc";
	int edac_idx, rc;
	struct device_node *np;
	const struct edac_device_prv_data *prv = &a10_sdmmceccb_data;

	rc = altr_check_ecc_deps(device);
	if (rc)
		return rc;

	np = of_find_compatible_node(NULL, NULL, "altr,socfpga-sdmmc-ecc");
	if (!np) {
		edac_printk(KERN_WARNING, EDAC_DEVICE, "SDMMC node not found\n");
		return -ENODEV;
	}

	/* Create the PortB EDAC device */
	edac_idx = edac_device_alloc_index();
	dci = edac_device_alloc_ctl_info(sizeof(*altdev), ecc_name, 1,
					 ecc_name, 1, 0, NULL, 0, edac_idx);
	if (!dci) {
		edac_printk(KERN_ERR, EDAC_DEVICE,
			    "%s: Unable to allocate PortB EDAC device\n",
			    ecc_name);
		return -ENOMEM;
	}

	/* Initialize the PortB EDAC device structure from PortA structure */
	altdev = dci->pvt_info;
	*altdev = *device;

	if (!devres_open_group(&altdev->ddev, altr_portb_setup, GFP_KERNEL))
		return -ENOMEM;

	/* Update PortB specific values */
	altdev->edac_dev_name = ecc_name;
	altdev->edac_idx = edac_idx;
	altdev->edac_dev = dci;
	altdev->data = prv;
	dci->dev = &altdev->ddev;
	dci->ctl_name = "Altera ECC Manager";
	dci->mod_name = ecc_name;
	dci->dev_name = ecc_name;

	/* Update the IRQs for PortB */
	altdev->sb_irq = irq_of_parse_and_map(np, 2);
	if (!altdev->sb_irq) {
		edac_printk(KERN_ERR, EDAC_DEVICE, "Error PortB SBIRQ alloc\n");
		rc = -ENODEV;
		goto err_release_group_1;
	}
	rc = devm_request_irq(&altdev->ddev, altdev->sb_irq,
			      prv->ecc_irq_handler,
			      IRQF_ONESHOT | IRQF_TRIGGER_HIGH,
			      ecc_name, altdev);
	if (rc) {
		edac_printk(KERN_ERR, EDAC_DEVICE, "PortB SBERR IRQ error\n");
		goto err_release_group_1;
	}

	altdev->db_irq = irq_of_parse_and_map(np, 3);
	if (!altdev->db_irq) {
		edac_printk(KERN_ERR, EDAC_DEVICE, "Error PortB DBIRQ alloc\n");
		rc = -ENODEV;
		goto err_release_group_1;
	}
	rc = devm_request_irq(&altdev->ddev, altdev->db_irq,
			      prv->ecc_irq_handler,
			      IRQF_ONESHOT | IRQF_TRIGGER_HIGH,
			      ecc_name, altdev);
	if (rc) {
		edac_printk(KERN_ERR, EDAC_DEVICE, "PortB DBERR IRQ error\n");
		goto err_release_group_1;
	}

	rc = edac_device_add_device(dci);
	if (rc) {
		edac_printk(KERN_ERR, EDAC_DEVICE,
			    "edac_device_add_device portB failed\n");
		rc = -ENOMEM;
		goto err_release_group_1;
	}
	altr_create_edacdev_dbgfs(dci, prv);

	list_add(&altdev->next, &altdev->edac->a10_ecc_devices);

	devres_remove_group(&altdev->ddev, altr_portb_setup);

	return 0;

err_release_group_1:
	edac_device_free_ctl_info(dci);
	devres_release_group(&altdev->ddev, altr_portb_setup);
	edac_printk(KERN_ERR, EDAC_DEVICE,
		    "%s:Error setting up EDAC device: %d\n", ecc_name, rc);
	return rc;
}

static irqreturn_t altr_edac_a10_ecc_irq_portb(int irq, void *dev_id)
{
	struct altr_edac_device_dev *ad = dev_id;
	void __iomem  *base = ad->base;
	const struct edac_device_prv_data *priv = ad->data;

	if (irq == ad->sb_irq) {
		writel(priv->ce_clear_mask,
		       base + ALTR_A10_ECC_INTSTAT_OFST);
		edac_device_handle_ce(ad->edac_dev, 0, 0, ad->edac_dev_name);
		return IRQ_HANDLED;
	} else if (irq == ad->db_irq) {
		writel(priv->ue_clear_mask,
		       base + ALTR_A10_ECC_INTSTAT_OFST);
		edac_device_handle_ue(ad->edac_dev, 0, 0, ad->edac_dev_name);
		return IRQ_HANDLED;
	}

	WARN_ONCE(1, "Unhandled IRQ%d on Port B.", irq);

	return IRQ_NONE;
}

static const struct edac_device_prv_data a10_sdmmcecca_data = {
	.setup = altr_portb_setup,
	.ce_clear_mask = ALTR_A10_ECC_SERRPENA,
	.ue_clear_mask = ALTR_A10_ECC_DERRPENA,
	.ecc_enable_mask = ALTR_A10_COMMON_ECC_EN_CTL,
	.ecc_en_ofst = ALTR_A10_ECC_CTRL_OFST,
	.ce_set_mask = ALTR_A10_ECC_SERRPENA,
	.ue_set_mask = ALTR_A10_ECC_DERRPENA,
	.set_err_ofst = ALTR_A10_ECC_INTTEST_OFST,
	.ecc_irq_handler = altr_edac_a10_ecc_irq,
	.inject_fops = &altr_edac_a10_device_inject_fops,
};

static const struct edac_device_prv_data a10_sdmmceccb_data = {
	.setup = altr_portb_setup,
	.ce_clear_mask = ALTR_A10_ECC_SERRPENB,
	.ue_clear_mask = ALTR_A10_ECC_DERRPENB,
	.ecc_enable_mask = ALTR_A10_COMMON_ECC_EN_CTL,
	.ecc_en_ofst = ALTR_A10_ECC_CTRL_OFST,
	.ce_set_mask = ALTR_A10_ECC_TSERRB,
	.ue_set_mask = ALTR_A10_ECC_TDERRB,
	.set_err_ofst = ALTR_A10_ECC_INTTEST_OFST,
	.ecc_irq_handler = altr_edac_a10_ecc_irq_portb,
	.inject_fops = &altr_edac_a10_device_inject_fops,
};

static int __init socfpga_init_sdmmc_ecc(void)
{
	int rc = -ENODEV;
	struct device_node *child;

	if (!socfpga_is_a10())
		return -ENODEV;

	child = of_find_compatible_node(NULL, NULL, "altr,socfpga-sdmmc-ecc");
	if (!child) {
		edac_printk(KERN_WARNING, EDAC_DEVICE, "SDMMC node not found\n");
		return -ENODEV;
	}

	if (!of_device_is_available(child))
		goto exit;

	if (validate_parent_available(child))
		goto exit;

	rc = altr_init_a10_ecc_block(child, ALTR_A10_SDMMC_IRQ_MASK,
				     a10_sdmmcecca_data.ecc_enable_mask, 1);
exit:
	of_node_put(child);
	return rc;
}

early_initcall(socfpga_init_sdmmc_ecc);

#endif	/* CONFIG_EDAC_ALTERA_SDMMC */

/********************* Arria10 EDAC Device Functions *************************/
static const struct of_device_id altr_edac_a10_device_of_match[] = {
#ifdef CONFIG_EDAC_ALTERA_L2C
	{ .compatible = "altr,socfpga-a10-l2-ecc", .data = &a10_l2ecc_data },
#endif
#ifdef CONFIG_EDAC_ALTERA_OCRAM
	{ .compatible = "altr,socfpga-a10-ocram-ecc",
	  .data = &a10_ocramecc_data },
#endif
#ifdef CONFIG_EDAC_ALTERA_ETHERNET
	{ .compatible = "altr,socfpga-eth-mac-ecc",
	  .data = &a10_enetecc_data },
#endif
#ifdef CONFIG_EDAC_ALTERA_NAND
	{ .compatible = "altr,socfpga-nand-ecc", .data = &a10_nandecc_data },
#endif
#ifdef CONFIG_EDAC_ALTERA_DMA
	{ .compatible = "altr,socfpga-dma-ecc", .data = &a10_dmaecc_data },
#endif
#ifdef CONFIG_EDAC_ALTERA_USB
	{ .compatible = "altr,socfpga-usb-ecc", .data = &a10_usbecc_data },
#endif
#ifdef CONFIG_EDAC_ALTERA_QSPI
	{ .compatible = "altr,socfpga-qspi-ecc", .data = &a10_qspiecc_data },
#endif
#ifdef CONFIG_EDAC_ALTERA_SDMMC
	{ .compatible = "altr,socfpga-sdmmc-ecc", .data = &a10_sdmmcecca_data },
#endif
	{},
};
MODULE_DEVICE_TABLE(of, altr_edac_a10_device_of_match);

/*
 * The Arria10 EDAC Device Functions differ from the Cyclone5/Arria5
 * because 2 IRQs are shared among the all ECC peripherals. The ECC
 * manager manages the IRQs and the children.
 * Based on xgene_edac.c peripheral code.
 */

static ssize_t altr_edac_a10_device_trig(struct file *file,
					 const char __user *user_buf,
					 size_t count, loff_t *ppos)
{
	struct edac_device_ctl_info *edac_dci = file->private_data;
	struct altr_edac_device_dev *drvdata = edac_dci->pvt_info;
	const struct edac_device_prv_data *priv = drvdata->data;
	void __iomem *set_addr = (drvdata->base + priv->set_err_ofst);
	unsigned long flags;
	u8 trig_type;

	if (!user_buf || get_user(trig_type, user_buf))
		return -EFAULT;

	local_irq_save(flags);
	if (trig_type == ALTR_UE_TRIGGER_CHAR)
		writel(priv->ue_set_mask, set_addr);
	else
		writel(priv->ce_set_mask, set_addr);
	/* Ensure the interrupt test bits are set */
	wmb();
	local_irq_restore(flags);

	return count;
}

static void altr_edac_a10_irq_handler(struct irq_desc *desc)
{
	int dberr, bit, sm_offset, irq_status;
	struct altr_arria10_edac *edac = irq_desc_get_handler_data(desc);
	struct irq_chip *chip = irq_desc_get_chip(desc);
	int irq = irq_desc_get_irq(desc);
	unsigned long bits;

	dberr = (irq == edac->db_irq) ? 1 : 0;
	sm_offset = dberr ? A10_SYSMGR_ECC_INTSTAT_DERR_OFST :
			    A10_SYSMGR_ECC_INTSTAT_SERR_OFST;

	chained_irq_enter(chip, desc);

	regmap_read(edac->ecc_mgr_map, sm_offset, &irq_status);

	bits = irq_status;
	for_each_set_bit(bit, &bits, 32) {
		irq = irq_linear_revmap(edac->domain, dberr * 32 + bit);
		if (irq)
			generic_handle_irq(irq);
	}

	chained_irq_exit(chip, desc);
}

static int validate_parent_available(struct device_node *np)
{
	struct device_node *parent;
	int ret = 0;

	/* Ensure parent device is enabled if parent node exists */
	parent = of_parse_phandle(np, "altr,ecc-parent", 0);
	if (parent && !of_device_is_available(parent))
		ret = -ENODEV;

	of_node_put(parent);
	return ret;
}

static int altr_edac_a10_device_add(struct altr_arria10_edac *edac,
				    struct device_node *np)
{
	struct edac_device_ctl_info *dci;
	struct altr_edac_device_dev *altdev;
	char *ecc_name = (char *)np->name;
	struct resource res;
	int edac_idx;
	int rc = 0;
	const struct edac_device_prv_data *prv;
	/* Get matching node and check for valid result */
	const struct of_device_id *pdev_id =
		of_match_node(altr_edac_a10_device_of_match, np);
	if (IS_ERR_OR_NULL(pdev_id))
		return -ENODEV;

	/* Get driver specific data for this EDAC device */
	prv = pdev_id->data;
	if (IS_ERR_OR_NULL(prv))
		return -ENODEV;

	if (validate_parent_available(np))
		return -ENODEV;

	if (!devres_open_group(edac->dev, altr_edac_a10_device_add, GFP_KERNEL))
		return -ENOMEM;

	rc = of_address_to_resource(np, 0, &res);
	if (rc < 0) {
		edac_printk(KERN_ERR, EDAC_DEVICE,
			    "%s: no resource address\n", ecc_name);
		goto err_release_group;
	}

	edac_idx = edac_device_alloc_index();
	dci = edac_device_alloc_ctl_info(sizeof(*altdev), ecc_name,
					 1, ecc_name, 1, 0, NULL, 0,
					 edac_idx);

	if (!dci) {
		edac_printk(KERN_ERR, EDAC_DEVICE,
			    "%s: Unable to allocate EDAC device\n", ecc_name);
		rc = -ENOMEM;
		goto err_release_group;
	}

	altdev = dci->pvt_info;
	dci->dev = edac->dev;
	altdev->edac_dev_name = ecc_name;
	altdev->edac_idx = edac_idx;
	altdev->edac = edac;
	altdev->edac_dev = dci;
	altdev->data = prv;
	altdev->ddev = *edac->dev;
	dci->dev = &altdev->ddev;
	dci->ctl_name = "Altera ECC Manager";
	dci->mod_name = ecc_name;
	dci->dev_name = ecc_name;

	altdev->base = devm_ioremap_resource(edac->dev, &res);
	if (IS_ERR(altdev->base)) {
		rc = PTR_ERR(altdev->base);
		goto err_release_group1;
	}

	/* Check specific dependencies for the module */
	if (altdev->data->setup) {
		rc = altdev->data->setup(altdev);
		if (rc)
			goto err_release_group1;
	}

	altdev->sb_irq = irq_of_parse_and_map(np, 0);
	if (!altdev->sb_irq) {
		edac_printk(KERN_ERR, EDAC_DEVICE, "Error allocating SBIRQ\n");
		rc = -ENODEV;
		goto err_release_group1;
	}
	rc = devm_request_irq(edac->dev, altdev->sb_irq, prv->ecc_irq_handler,
			      IRQF_ONESHOT | IRQF_TRIGGER_HIGH,
			      ecc_name, altdev);
	if (rc) {
		edac_printk(KERN_ERR, EDAC_DEVICE, "No SBERR IRQ resource\n");
		goto err_release_group1;
	}

	altdev->db_irq = irq_of_parse_and_map(np, 1);
	if (!altdev->db_irq) {
		edac_printk(KERN_ERR, EDAC_DEVICE, "Error allocating DBIRQ\n");
		rc = -ENODEV;
		goto err_release_group1;
	}
	rc = devm_request_irq(edac->dev, altdev->db_irq, prv->ecc_irq_handler,
			      IRQF_ONESHOT | IRQF_TRIGGER_HIGH,
			      ecc_name, altdev);
	if (rc) {
		edac_printk(KERN_ERR, EDAC_DEVICE, "No DBERR IRQ resource\n");
		goto err_release_group1;
	}

	rc = edac_device_add_device(dci);
	if (rc) {
		dev_err(edac->dev, "edac_device_add_device failed\n");
		rc = -ENOMEM;
		goto err_release_group1;
	}

	altr_create_edacdev_dbgfs(dci, prv);

	list_add(&altdev->next, &edac->a10_ecc_devices);

	devres_remove_group(edac->dev, altr_edac_a10_device_add);

	return 0;

err_release_group1:
	edac_device_free_ctl_info(dci);
err_release_group:
	devres_release_group(edac->dev, NULL);
	edac_printk(KERN_ERR, EDAC_DEVICE,
		    "%s:Error setting up EDAC device: %d\n", ecc_name, rc);

	return rc;
}

static void a10_eccmgr_irq_mask(struct irq_data *d)
{
	struct altr_arria10_edac *edac = irq_data_get_irq_chip_data(d);

	regmap_write(edac->ecc_mgr_map,	A10_SYSMGR_ECC_INTMASK_SET_OFST,
		     BIT(d->hwirq));
}

static void a10_eccmgr_irq_unmask(struct irq_data *d)
{
	struct altr_arria10_edac *edac = irq_data_get_irq_chip_data(d);

	regmap_write(edac->ecc_mgr_map,	A10_SYSMGR_ECC_INTMASK_CLR_OFST,
		     BIT(d->hwirq));
}

static int a10_eccmgr_irqdomain_map(struct irq_domain *d, unsigned int irq,
				    irq_hw_number_t hwirq)
{
	struct altr_arria10_edac *edac = d->host_data;

	irq_set_chip_and_handler(irq, &edac->irq_chip, handle_simple_irq);
	irq_set_chip_data(irq, edac);
	irq_set_noprobe(irq);

	return 0;
}

static struct irq_domain_ops a10_eccmgr_ic_ops = {
	.map = a10_eccmgr_irqdomain_map,
	.xlate = irq_domain_xlate_twocell,
};

static int altr_edac_a10_probe(struct platform_device *pdev)
{
	struct altr_arria10_edac *edac;
	struct device_node *child;

	edac = devm_kzalloc(&pdev->dev, sizeof(*edac), GFP_KERNEL);
	if (!edac)
		return -ENOMEM;

	edac->dev = &pdev->dev;
	platform_set_drvdata(pdev, edac);
	INIT_LIST_HEAD(&edac->a10_ecc_devices);

	edac->ecc_mgr_map = syscon_regmap_lookup_by_phandle(pdev->dev.of_node,
							"altr,sysmgr-syscon");
	if (IS_ERR(edac->ecc_mgr_map)) {
		edac_printk(KERN_ERR, EDAC_DEVICE,
			    "Unable to get syscon altr,sysmgr-syscon\n");
		return PTR_ERR(edac->ecc_mgr_map);
	}

	edac->irq_chip.name = pdev->dev.of_node->name;
	edac->irq_chip.irq_mask = a10_eccmgr_irq_mask;
	edac->irq_chip.irq_unmask = a10_eccmgr_irq_unmask;
	edac->domain = irq_domain_add_linear(pdev->dev.of_node, 64,
					     &a10_eccmgr_ic_ops, edac);
	if (!edac->domain) {
		dev_err(&pdev->dev, "Error adding IRQ domain\n");
		return -ENOMEM;
	}

	edac->sb_irq = platform_get_irq(pdev, 0);
	if (edac->sb_irq < 0) {
		dev_err(&pdev->dev, "No SBERR IRQ resource\n");
		return edac->sb_irq;
	}

	irq_set_chained_handler_and_data(edac->sb_irq,
					 altr_edac_a10_irq_handler,
					 edac);

	edac->db_irq = platform_get_irq(pdev, 1);
	if (edac->db_irq < 0) {
		dev_err(&pdev->dev, "No DBERR IRQ resource\n");
		return edac->db_irq;
	}
	irq_set_chained_handler_and_data(edac->db_irq,
					 altr_edac_a10_irq_handler,
					 edac);

	for_each_child_of_node(pdev->dev.of_node, child) {
		if (!of_device_is_available(child))
			continue;

		if (of_device_is_compatible(child, "altr,socfpga-a10-l2-ecc") || 
		    of_device_is_compatible(child, "altr,socfpga-a10-ocram-ecc") ||
		    of_device_is_compatible(child, "altr,socfpga-eth-mac-ecc") ||
		    of_device_is_compatible(child, "altr,socfpga-nand-ecc") ||
		    of_device_is_compatible(child, "altr,socfpga-dma-ecc") ||
		    of_device_is_compatible(child, "altr,socfpga-usb-ecc") ||
		    of_device_is_compatible(child, "altr,socfpga-qspi-ecc") ||
		    of_device_is_compatible(child, "altr,socfpga-sdmmc-ecc"))

			altr_edac_a10_device_add(edac, child);

		else if (of_device_is_compatible(child, "altr,sdram-edac-a10"))
			of_platform_populate(pdev->dev.of_node,
					     altr_sdram_ctrl_of_match,
					     NULL, &pdev->dev);
	}

	return 0;
}

static const struct of_device_id altr_edac_a10_of_match[] = {
	{ .compatible = "altr,socfpga-a10-ecc-manager" },
	{},
};
MODULE_DEVICE_TABLE(of, altr_edac_a10_of_match);

static struct platform_driver altr_edac_a10_driver = {
	.probe =  altr_edac_a10_probe,
	.driver = {
		.name = "socfpga_a10_ecc_manager",
		.of_match_table = altr_edac_a10_of_match,
	},
};
module_platform_driver(altr_edac_a10_driver);

MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Thor Thayer");
MODULE_DESCRIPTION("EDAC Driver for Altera Memories");