summaryrefslogtreecommitdiffstats
path: root/common/cmd_i2c.c
blob: 1bc0db860c3344dad85466fc52c0c61cddca3998 (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
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
/*
 * (C) Copyright 2009
 * Sergey Kubushyn, himself, ksi@koi8.net
 *
 * Changes for unified multibus/multiadapter I2C support.
 *
 * (C) Copyright 2001
 * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com.
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

/*
 * I2C Functions similar to the standard memory functions.
 *
 * There are several parameters in many of the commands that bear further
 * explanations:
 *
 * {i2c_chip} is the I2C chip address (the first byte sent on the bus).
 *   Each I2C chip on the bus has a unique address.  On the I2C data bus,
 *   the address is the upper seven bits and the LSB is the "read/write"
 *   bit.  Note that the {i2c_chip} address specified on the command
 *   line is not shifted up: e.g. a typical EEPROM memory chip may have
 *   an I2C address of 0x50, but the data put on the bus will be 0xA0
 *   for write and 0xA1 for read.  This "non shifted" address notation
 *   matches at least half of the data sheets :-/.
 *
 * {addr} is the address (or offset) within the chip.  Small memory
 *   chips have 8 bit addresses.  Large memory chips have 16 bit
 *   addresses.  Other memory chips have 9, 10, or 11 bit addresses.
 *   Many non-memory chips have multiple registers and {addr} is used
 *   as the register index.  Some non-memory chips have only one register
 *   and therefore don't need any {addr} parameter.
 *
 *   The default {addr} parameter is one byte (.1) which works well for
 *   memories and registers with 8 bits of address space.
 *
 *   You can specify the length of the {addr} field with the optional .0,
 *   .1, or .2 modifier (similar to the .b, .w, .l modifier).  If you are
 *   manipulating a single register device which doesn't use an address
 *   field, use "0.0" for the address and the ".0" length field will
 *   suppress the address in the I2C data stream.  This also works for
 *   successive reads using the I2C auto-incrementing memory pointer.
 *
 *   If you are manipulating a large memory with 2-byte addresses, use
 *   the .2 address modifier, e.g. 210.2 addresses location 528 (decimal).
 *
 *   Then there are the unfortunate memory chips that spill the most
 *   significant 1, 2, or 3 bits of address into the chip address byte.
 *   This effectively makes one chip (logically) look like 2, 4, or
 *   8 chips.  This is handled (awkwardly) by #defining
 *   CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW and using the .1 modifier on the
 *   {addr} field (since .1 is the default, it doesn't actually have to
 *   be specified).  Examples: given a memory chip at I2C chip address
 *   0x50, the following would happen...
 *     i2c md 50 0 10   display 16 bytes starting at 0x000
 *                      On the bus: <S> A0 00 <E> <S> A1 <rd> ... <rd>
 *     i2c md 50 100 10 display 16 bytes starting at 0x100
 *                      On the bus: <S> A2 00 <E> <S> A3 <rd> ... <rd>
 *     i2c md 50 210 10 display 16 bytes starting at 0x210
 *                      On the bus: <S> A4 10 <E> <S> A5 <rd> ... <rd>
 *   This is awfully ugly.  It would be nice if someone would think up
 *   a better way of handling this.
 *
 * Adapted from cmd_mem.c which is copyright Wolfgang Denk (wd@denx.de).
 */

#include <common.h>
#include <bootretry.h>
#include <cli.h>
#include <command.h>
#include <dm.h>
#include <edid.h>
#include <environment.h>
#include <errno.h>
#include <i2c.h>
#include <malloc.h>
#include <asm/byteorder.h>
#include <linux/compiler.h>

DECLARE_GLOBAL_DATA_PTR;

/* Display values from last command.
 * Memory modify remembered values are different from display memory.
 */
static uint	i2c_dp_last_chip;
static uint	i2c_dp_last_addr;
static uint	i2c_dp_last_alen;
static uint	i2c_dp_last_length = 0x10;

static uint	i2c_mm_last_chip;
static uint	i2c_mm_last_addr;
static uint	i2c_mm_last_alen;

/* If only one I2C bus is present, the list of devices to ignore when
 * the probe command is issued is represented by a 1D array of addresses.
 * When multiple buses are present, the list is an array of bus-address
 * pairs.  The following macros take care of this */

#if defined(CONFIG_SYS_I2C_NOPROBES)
#if defined(CONFIG_SYS_I2C) || defined(CONFIG_I2C_MULTI_BUS)
static struct
{
	uchar	bus;
	uchar	addr;
} i2c_no_probes[] = CONFIG_SYS_I2C_NOPROBES;
#define GET_BUS_NUM	i2c_get_bus_num()
#define COMPARE_BUS(b,i)	(i2c_no_probes[(i)].bus == (b))
#define COMPARE_ADDR(a,i)	(i2c_no_probes[(i)].addr == (a))
#define NO_PROBE_ADDR(i)	i2c_no_probes[(i)].addr
#else		/* single bus */
static uchar i2c_no_probes[] = CONFIG_SYS_I2C_NOPROBES;
#define GET_BUS_NUM	0
#define COMPARE_BUS(b,i)	((b) == 0)	/* Make compiler happy */
#define COMPARE_ADDR(a,i)	(i2c_no_probes[(i)] == (a))
#define NO_PROBE_ADDR(i)	i2c_no_probes[(i)]
#endif	/* defined(CONFIG_SYS_I2C) */
#endif

#define DISP_LINE_LEN	16

/*
 * Default for driver model is to use the chip's existing address length.
 * For legacy code, this is not stored, so we need to use a suitable
 * default.
 */
#ifdef CONFIG_DM_I2C
#define DEFAULT_ADDR_LEN	(-1)
#else
#define DEFAULT_ADDR_LEN	1
#endif

#ifdef CONFIG_DM_I2C
static struct udevice *i2c_cur_bus;

static int cmd_i2c_set_bus_num(unsigned int busnum)
{
	struct udevice *bus;
	int ret;

	ret = uclass_get_device_by_seq(UCLASS_I2C, busnum, &bus);
	if (ret) {
		debug("%s: No bus %d\n", __func__, busnum);
		return ret;
	}
	i2c_cur_bus = bus;

	return 0;
}

static int i2c_get_cur_bus(struct udevice **busp)
{
	if (!i2c_cur_bus) {
		puts("No I2C bus selected\n");
		return -ENODEV;
	}
	*busp = i2c_cur_bus;

	return 0;
}

static int i2c_get_cur_bus_chip(uint chip_addr, struct udevice **devp)
{
	struct udevice *bus;
	int ret;

	ret = i2c_get_cur_bus(&bus);
	if (ret)
		return ret;

	return i2c_get_chip(bus, chip_addr, 1, devp);
}

#endif

/**
 * i2c_init_board() - Board-specific I2C bus init
 *
 * This function is the default no-op implementation of I2C bus
 * initialization. This function can be overriden by board-specific
 * implementation if needed.
 */
__weak
void i2c_init_board(void)
{
}

/* TODO: Implement architecture-specific get/set functions */

/**
 * i2c_get_bus_speed() - Return I2C bus speed
 *
 * This function is the default implementation of function for retrieveing
 * the current I2C bus speed in Hz.
 *
 * A driver implementing runtime switching of I2C bus speed must override
 * this function to report the speed correctly. Simple or legacy drivers
 * can use this fallback.
 *
 * Returns I2C bus speed in Hz.
 */
#if !defined(CONFIG_SYS_I2C) && !defined(CONFIG_DM_I2C)
/*
 * TODO: Implement architecture-specific get/set functions
 * Should go away, if we switched completely to new multibus support
 */
__weak
unsigned int i2c_get_bus_speed(void)
{
	return CONFIG_SYS_I2C_SPEED;
}

/**
 * i2c_set_bus_speed() - Configure I2C bus speed
 * @speed:	Newly set speed of the I2C bus in Hz
 *
 * This function is the default implementation of function for setting
 * the I2C bus speed in Hz.
 *
 * A driver implementing runtime switching of I2C bus speed must override
 * this function to report the speed correctly. Simple or legacy drivers
 * can use this fallback.
 *
 * Returns zero on success, negative value on error.
 */
__weak
int i2c_set_bus_speed(unsigned int speed)
{
	if (speed != CONFIG_SYS_I2C_SPEED)
		return -1;

	return 0;
}
#endif

/**
 * get_alen() - Small parser helper function to get address length
 *
 * Returns the address length.
 */
static uint get_alen(char *arg, int default_len)
{
	int	j;
	int	alen;

	alen = default_len;
	for (j = 0; j < 8; j++) {
		if (arg[j] == '.') {
			alen = arg[j+1] - '0';
			break;
		} else if (arg[j] == '\0')
			break;
	}
	return alen;
}

enum i2c_err_op {
	I2C_ERR_READ,
	I2C_ERR_WRITE,
};

static int i2c_report_err(int ret, enum i2c_err_op op)
{
	printf("Error %s the chip: %d\n",
	       op == I2C_ERR_READ ? "reading" : "writing", ret);

	return CMD_RET_FAILURE;
}

/**
 * do_i2c_read() - Handle the "i2c read" command-line command
 * @cmdtp:	Command data struct pointer
 * @flag:	Command flag
 * @argc:	Command-line argument count
 * @argv:	Array of command-line arguments
 *
 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
 * on error.
 *
 * Syntax:
 *	i2c read {i2c_chip} {devaddr}{.0, .1, .2} {len} {memaddr}
 */
static int do_i2c_read ( cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
	uint	chip;
	uint	devaddr, length;
	int alen;
	u_char  *memaddr;
	int ret;
#ifdef CONFIG_DM_I2C
	struct udevice *dev;
#endif

	if (argc != 5)
		return CMD_RET_USAGE;

	/*
	 * I2C chip address
	 */
	chip = simple_strtoul(argv[1], NULL, 16);

	/*
	 * I2C data address within the chip.  This can be 1 or
	 * 2 bytes long.  Some day it might be 3 bytes long :-).
	 */
	devaddr = simple_strtoul(argv[2], NULL, 16);
	alen = get_alen(argv[2], DEFAULT_ADDR_LEN);
	if (alen > 3)
		return CMD_RET_USAGE;

	/*
	 * Length is the number of objects, not number of bytes.
	 */
	length = simple_strtoul(argv[3], NULL, 16);

	/*
	 * memaddr is the address where to store things in memory
	 */
	memaddr = (u_char *)simple_strtoul(argv[4], NULL, 16);

#ifdef CONFIG_DM_I2C
	ret = i2c_get_cur_bus_chip(chip, &dev);
	if (!ret && alen != -1)
		ret = i2c_set_chip_offset_len(dev, alen);
	if (!ret)
		ret = dm_i2c_read(dev, devaddr, memaddr, length);
#else
	ret = i2c_read(chip, devaddr, alen, memaddr, length);
#endif
	if (ret)
		return i2c_report_err(ret, I2C_ERR_READ);

	return 0;
}

static int do_i2c_write(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
	uint	chip;
	uint	devaddr, length;
	int alen;
	u_char  *memaddr;
	int ret;
#ifdef CONFIG_DM_I2C
	struct udevice *dev;
	struct dm_i2c_chip *i2c_chip;
#endif

	if ((argc < 5) || (argc > 6))
		return cmd_usage(cmdtp);

	/*
	 * memaddr is the address where to store things in memory
	 */
	memaddr = (u_char *)simple_strtoul(argv[1], NULL, 16);

	/*
	 * I2C chip address
	 */
	chip = simple_strtoul(argv[2], NULL, 16);

	/*
	 * I2C data address within the chip.  This can be 1 or
	 * 2 bytes long.  Some day it might be 3 bytes long :-).
	 */
	devaddr = simple_strtoul(argv[3], NULL, 16);
	alen = get_alen(argv[3], DEFAULT_ADDR_LEN);
	if (alen > 3)
		return cmd_usage(cmdtp);

	/*
	 * Length is the number of bytes.
	 */
	length = simple_strtoul(argv[4], NULL, 16);

#ifdef CONFIG_DM_I2C
	ret = i2c_get_cur_bus_chip(chip, &dev);
	if (!ret && alen != -1)
		ret = i2c_set_chip_offset_len(dev, alen);
	if (ret)
		return i2c_report_err(ret, I2C_ERR_WRITE);
	i2c_chip = dev_get_parent_platdata(dev);
	if (!i2c_chip)
		return i2c_report_err(ret, I2C_ERR_WRITE);
#endif

	if (argc == 6 && !strcmp(argv[5], "-s")) {
		/*
		 * Write all bytes in a single I2C transaction. If the target
		 * device is an EEPROM, it is your responsibility to not cross
		 * a page boundary. No write delay upon completion, take this
		 * into account if linking commands.
		 */
#ifdef CONFIG_DM_I2C
		i2c_chip->flags &= ~DM_I2C_CHIP_WR_ADDRESS;
		ret = dm_i2c_write(dev, devaddr, memaddr, length);
#else
		ret = i2c_write(chip, devaddr, alen, memaddr, length);
#endif
		if (ret)
			return i2c_report_err(ret, I2C_ERR_WRITE);
	} else {
		/*
		 * Repeated addressing - perform <length> separate
		 * write transactions of one byte each
		 */
		while (length-- > 0) {
#ifdef CONFIG_DM_I2C
			i2c_chip->flags |= DM_I2C_CHIP_WR_ADDRESS;
			ret = dm_i2c_write(dev, devaddr++, memaddr++, 1);
#else
			ret = i2c_write(chip, devaddr++, alen, memaddr++, 1);
#endif
			if (ret)
				return i2c_report_err(ret, I2C_ERR_WRITE);
/*
 * No write delay with FRAM devices.
 */
#if !defined(CONFIG_SYS_I2C_FRAM)
			udelay(11000);
#endif
		}
	}
	return 0;
}

#ifdef CONFIG_DM_I2C
static int do_i2c_flags(cmd_tbl_t *cmdtp, int flag, int argc,
			char *const argv[])
{
	struct udevice *dev;
	uint flags;
	int chip;
	int ret;

	if (argc < 2)
		return CMD_RET_USAGE;

	chip = simple_strtoul(argv[1], NULL, 16);
	ret = i2c_get_cur_bus_chip(chip, &dev);
	if (ret)
		return i2c_report_err(ret, I2C_ERR_READ);

	if (argc > 2) {
		flags = simple_strtoul(argv[2], NULL, 16);
		ret = i2c_set_chip_flags(dev, flags);
	} else  {
		ret = i2c_get_chip_flags(dev, &flags);
		if (!ret)
			printf("%x\n", flags);
	}
	if (ret)
		return i2c_report_err(ret, I2C_ERR_READ);

	return 0;
}
#endif

/**
 * do_i2c_md() - Handle the "i2c md" command-line command
 * @cmdtp:	Command data struct pointer
 * @flag:	Command flag
 * @argc:	Command-line argument count
 * @argv:	Array of command-line arguments
 *
 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
 * on error.
 *
 * Syntax:
 *	i2c md {i2c_chip} {addr}{.0, .1, .2} {len}
 */
static int do_i2c_md ( cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
	uint	chip;
	uint	addr, length;
	int alen;
	int	j, nbytes, linebytes;
	int ret;
#ifdef CONFIG_DM_I2C
	struct udevice *dev;
#endif

	/* We use the last specified parameters, unless new ones are
	 * entered.
	 */
	chip   = i2c_dp_last_chip;
	addr   = i2c_dp_last_addr;
	alen   = i2c_dp_last_alen;
	length = i2c_dp_last_length;

	if (argc < 3)
		return CMD_RET_USAGE;

	if ((flag & CMD_FLAG_REPEAT) == 0) {
		/*
		 * New command specified.
		 */

		/*
		 * I2C chip address
		 */
		chip = simple_strtoul(argv[1], NULL, 16);

		/*
		 * I2C data address within the chip.  This can be 1 or
		 * 2 bytes long.  Some day it might be 3 bytes long :-).
		 */
		addr = simple_strtoul(argv[2], NULL, 16);
		alen = get_alen(argv[2], DEFAULT_ADDR_LEN);
		if (alen > 3)
			return CMD_RET_USAGE;

		/*
		 * If another parameter, it is the length to display.
		 * Length is the number of objects, not number of bytes.
		 */
		if (argc > 3)
			length = simple_strtoul(argv[3], NULL, 16);
	}

#ifdef CONFIG_DM_I2C
	ret = i2c_get_cur_bus_chip(chip, &dev);
	if (!ret && alen != -1)
		ret = i2c_set_chip_offset_len(dev, alen);
	if (ret)
		return i2c_report_err(ret, I2C_ERR_READ);
#endif

	/*
	 * Print the lines.
	 *
	 * We buffer all read data, so we can make sure data is read only
	 * once.
	 */
	nbytes = length;
	do {
		unsigned char	linebuf[DISP_LINE_LEN];
		unsigned char	*cp;

		linebytes = (nbytes > DISP_LINE_LEN) ? DISP_LINE_LEN : nbytes;

#ifdef CONFIG_DM_I2C
		ret = dm_i2c_read(dev, addr, linebuf, linebytes);
#else
		ret = i2c_read(chip, addr, alen, linebuf, linebytes);
#endif
		if (ret)
			return i2c_report_err(ret, I2C_ERR_READ);
		else {
			printf("%04x:", addr);
			cp = linebuf;
			for (j=0; j<linebytes; j++) {
				printf(" %02x", *cp++);
				addr++;
			}
			puts ("    ");
			cp = linebuf;
			for (j=0; j<linebytes; j++) {
				if ((*cp < 0x20) || (*cp > 0x7e))
					puts (".");
				else
					printf("%c", *cp);
				cp++;
			}
			putc ('\n');
		}
		nbytes -= linebytes;
	} while (nbytes > 0);

	i2c_dp_last_chip   = chip;
	i2c_dp_last_addr   = addr;
	i2c_dp_last_alen   = alen;
	i2c_dp_last_length = length;

	return 0;
}

/**
 * do_i2c_mw() - Handle the "i2c mw" command-line command
 * @cmdtp:	Command data struct pointer
 * @flag:	Command flag
 * @argc:	Command-line argument count
 * @argv:	Array of command-line arguments
 *
 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
 * on error.
 *
 * Syntax:
 *	i2c mw {i2c_chip} {addr}{.0, .1, .2} {data} [{count}]
 */
static int do_i2c_mw ( cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
	uint	chip;
	ulong	addr;
	int	alen;
	uchar	byte;
	int	count;
	int ret;
#ifdef CONFIG_DM_I2C
	struct udevice *dev;
#endif

	if ((argc < 4) || (argc > 5))
		return CMD_RET_USAGE;

	/*
	 * Chip is always specified.
	 */
	chip = simple_strtoul(argv[1], NULL, 16);

	/*
	 * Address is always specified.
	 */
	addr = simple_strtoul(argv[2], NULL, 16);
	alen = get_alen(argv[2], DEFAULT_ADDR_LEN);
	if (alen > 3)
		return CMD_RET_USAGE;

#ifdef CONFIG_DM_I2C
	ret = i2c_get_cur_bus_chip(chip, &dev);
	if (!ret && alen != -1)
		ret = i2c_set_chip_offset_len(dev, alen);
	if (ret)
		return i2c_report_err(ret, I2C_ERR_WRITE);
#endif
	/*
	 * Value to write is always specified.
	 */
	byte = simple_strtoul(argv[3], NULL, 16);

	/*
	 * Optional count
	 */
	if (argc == 5)
		count = simple_strtoul(argv[4], NULL, 16);
	else
		count = 1;

	while (count-- > 0) {
#ifdef CONFIG_DM_I2C
		ret = dm_i2c_write(dev, addr++, &byte, 1);
#else
		ret = i2c_write(chip, addr++, alen, &byte, 1);
#endif
		if (ret)
			return i2c_report_err(ret, I2C_ERR_WRITE);
		/*
		 * Wait for the write to complete.  The write can take
		 * up to 10mSec (we allow a little more time).
		 */
/*
 * No write delay with FRAM devices.
 */
#if !defined(CONFIG_SYS_I2C_FRAM)
		udelay(11000);
#endif
	}

	return 0;
}

/**
 * do_i2c_crc() - Handle the "i2c crc32" command-line command
 * @cmdtp:	Command data struct pointer
 * @flag:	Command flag
 * @argc:	Command-line argument count
 * @argv:	Array of command-line arguments
 *
 * Calculate a CRC on memory
 *
 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
 * on error.
 *
 * Syntax:
 *	i2c crc32 {i2c_chip} {addr}{.0, .1, .2} {count}
 */
static int do_i2c_crc (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
	uint	chip;
	ulong	addr;
	int	alen;
	int	count;
	uchar	byte;
	ulong	crc;
	ulong	err;
	int ret = 0;
#ifdef CONFIG_DM_I2C
	struct udevice *dev;
#endif

	if (argc < 4)
		return CMD_RET_USAGE;

	/*
	 * Chip is always specified.
	 */
	chip = simple_strtoul(argv[1], NULL, 16);

	/*
	 * Address is always specified.
	 */
	addr = simple_strtoul(argv[2], NULL, 16);
	alen = get_alen(argv[2], DEFAULT_ADDR_LEN);
	if (alen > 3)
		return CMD_RET_USAGE;

#ifdef CONFIG_DM_I2C
	ret = i2c_get_cur_bus_chip(chip, &dev);
	if (!ret && alen != -1)
		ret = i2c_set_chip_offset_len(dev, alen);
	if (ret)
		return i2c_report_err(ret, I2C_ERR_READ);
#endif
	/*
	 * Count is always specified
	 */
	count = simple_strtoul(argv[3], NULL, 16);

	printf ("CRC32 for %08lx ... %08lx ==> ", addr, addr + count - 1);
	/*
	 * CRC a byte at a time.  This is going to be slooow, but hey, the
	 * memories are small and slow too so hopefully nobody notices.
	 */
	crc = 0;
	err = 0;
	while (count-- > 0) {
#ifdef CONFIG_DM_I2C
		ret = dm_i2c_read(dev, addr, &byte, 1);
#else
		ret = i2c_read(chip, addr, alen, &byte, 1);
#endif
		if (ret)
			err++;
		crc = crc32 (crc, &byte, 1);
		addr++;
	}
	if (err > 0)
		i2c_report_err(ret, I2C_ERR_READ);
	else
		printf ("%08lx\n", crc);

	return 0;
}

/**
 * mod_i2c_mem() - Handle the "i2c mm" and "i2c nm" command-line command
 * @cmdtp:	Command data struct pointer
 * @flag:	Command flag
 * @argc:	Command-line argument count
 * @argv:	Array of command-line arguments
 *
 * Modify memory.
 *
 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
 * on error.
 *
 * Syntax:
 *	i2c mm{.b, .w, .l} {i2c_chip} {addr}{.0, .1, .2}
 *	i2c nm{.b, .w, .l} {i2c_chip} {addr}{.0, .1, .2}
 */
static int
mod_i2c_mem(cmd_tbl_t *cmdtp, int incrflag, int flag, int argc, char * const argv[])
{
	uint	chip;
	ulong	addr;
	int	alen;
	ulong	data;
	int	size = 1;
	int	nbytes;
	int ret;
#ifdef CONFIG_DM_I2C
	struct udevice *dev;
#endif

	if (argc != 3)
		return CMD_RET_USAGE;

	bootretry_reset_cmd_timeout();	/* got a good command to get here */
	/*
	 * We use the last specified parameters, unless new ones are
	 * entered.
	 */
	chip = i2c_mm_last_chip;
	addr = i2c_mm_last_addr;
	alen = i2c_mm_last_alen;

	if ((flag & CMD_FLAG_REPEAT) == 0) {
		/*
		 * New command specified.  Check for a size specification.
		 * Defaults to byte if no or incorrect specification.
		 */
		size = cmd_get_data_size(argv[0], 1);

		/*
		 * Chip is always specified.
		 */
		chip = simple_strtoul(argv[1], NULL, 16);

		/*
		 * Address is always specified.
		 */
		addr = simple_strtoul(argv[2], NULL, 16);
		alen = get_alen(argv[2], DEFAULT_ADDR_LEN);
		if (alen > 3)
			return CMD_RET_USAGE;
	}

#ifdef CONFIG_DM_I2C
	ret = i2c_get_cur_bus_chip(chip, &dev);
	if (!ret && alen != -1)
		ret = i2c_set_chip_offset_len(dev, alen);
	if (ret)
		return i2c_report_err(ret, I2C_ERR_WRITE);
#endif

	/*
	 * Print the address, followed by value.  Then accept input for
	 * the next value.  A non-converted value exits.
	 */
	do {
		printf("%08lx:", addr);
#ifdef CONFIG_DM_I2C
		ret = dm_i2c_read(dev, addr, (uchar *)&data, size);
#else
		ret = i2c_read(chip, addr, alen, (uchar *)&data, size);
#endif
		if (ret)
			return i2c_report_err(ret, I2C_ERR_READ);

		data = cpu_to_be32(data);
		if (size == 1)
			printf(" %02lx", (data >> 24) & 0x000000FF);
		else if (size == 2)
			printf(" %04lx", (data >> 16) & 0x0000FFFF);
		else
			printf(" %08lx", data);

		nbytes = cli_readline(" ? ");
		if (nbytes == 0) {
			/*
			 * <CR> pressed as only input, don't modify current
			 * location and move to next.
			 */
			if (incrflag)
				addr += size;
			nbytes = size;
			/* good enough to not time out */
			bootretry_reset_cmd_timeout();
		}
#ifdef CONFIG_BOOT_RETRY_TIME
		else if (nbytes == -2)
			break;	/* timed out, exit the command	*/
#endif
		else {
			char *endp;

			data = simple_strtoul(console_buffer, &endp, 16);
			if (size == 1)
				data = data << 24;
			else if (size == 2)
				data = data << 16;
			data = be32_to_cpu(data);
			nbytes = endp - console_buffer;
			if (nbytes) {
				/*
				 * good enough to not time out
				 */
				bootretry_reset_cmd_timeout();
#ifdef CONFIG_DM_I2C
				ret = dm_i2c_write(dev, addr, (uchar *)&data,
						   size);
#else
				ret = i2c_write(chip, addr, alen,
						(uchar *)&data, size);
#endif
				if (ret)
					return i2c_report_err(ret,
							      I2C_ERR_WRITE);
#ifdef CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS
				udelay(CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS * 1000);
#endif
				if (incrflag)
					addr += size;
			}
		}
	} while (nbytes);

	i2c_mm_last_chip = chip;
	i2c_mm_last_addr = addr;
	i2c_mm_last_alen = alen;

	return 0;
}

/**
 * do_i2c_probe() - Handle the "i2c probe" command-line command
 * @cmdtp:	Command data struct pointer
 * @flag:	Command flag
 * @argc:	Command-line argument count
 * @argv:	Array of command-line arguments
 *
 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
 * on error.
 *
 * Syntax:
 *	i2c probe {addr}
 *
 * Returns zero (success) if one or more I2C devices was found
 */
static int do_i2c_probe (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
	int j;
	int addr = -1;
	int found = 0;
#if defined(CONFIG_SYS_I2C_NOPROBES)
	int k, skip;
	unsigned int bus = GET_BUS_NUM;
#endif	/* NOPROBES */
	int ret;
#ifdef CONFIG_DM_I2C
	struct udevice *bus, *dev;

	if (i2c_get_cur_bus(&bus))
		return CMD_RET_FAILURE;
#endif

	if (argc == 2)
		addr = simple_strtol(argv[1], 0, 16);

	puts ("Valid chip addresses:");
	for (j = 0; j < 128; j++) {
		if ((0 <= addr) && (j != addr))
			continue;

#if defined(CONFIG_SYS_I2C_NOPROBES)
		skip = 0;
		for (k = 0; k < ARRAY_SIZE(i2c_no_probes); k++) {
			if (COMPARE_BUS(bus, k) && COMPARE_ADDR(j, k)) {
				skip = 1;
				break;
			}
		}
		if (skip)
			continue;
#endif
#ifdef CONFIG_DM_I2C
		ret = dm_i2c_probe(bus, j, 0, &dev);
#else
		ret = i2c_probe(j);
#endif
		if (ret == 0) {
			printf(" %02X", j);
			found++;
		}
	}
	putc ('\n');

#if defined(CONFIG_SYS_I2C_NOPROBES)
	puts ("Excluded chip addresses:");
	for (k = 0; k < ARRAY_SIZE(i2c_no_probes); k++) {
		if (COMPARE_BUS(bus,k))
			printf(" %02X", NO_PROBE_ADDR(k));
	}
	putc ('\n');
#endif

	return (0 == found);
}

/**
 * do_i2c_loop() - Handle the "i2c loop" command-line command
 * @cmdtp:	Command data struct pointer
 * @flag:	Command flag
 * @argc:	Command-line argument count
 * @argv:	Array of command-line arguments
 *
 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
 * on error.
 *
 * Syntax:
 *	i2c loop {i2c_chip} {addr}{.0, .1, .2} [{length}] [{delay}]
 *	{length} - Number of bytes to read
 *	{delay}  - A DECIMAL number and defaults to 1000 uSec
 */
static int do_i2c_loop(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
	uint	chip;
	int alen;
	uint	addr;
	uint	length;
	u_char	bytes[16];
	int	delay;
	int ret;
#ifdef CONFIG_DM_I2C
	struct udevice *dev;
#endif

	if (argc < 3)
		return CMD_RET_USAGE;

	/*
	 * Chip is always specified.
	 */
	chip = simple_strtoul(argv[1], NULL, 16);

	/*
	 * Address is always specified.
	 */
	addr = simple_strtoul(argv[2], NULL, 16);
	alen = get_alen(argv[2], DEFAULT_ADDR_LEN);
	if (alen > 3)
		return CMD_RET_USAGE;
#ifdef CONFIG_DM_I2C
	ret = i2c_get_cur_bus_chip(chip, &dev);
	if (!ret && alen != -1)
		ret = i2c_set_chip_offset_len(dev, alen);
	if (ret)
		return i2c_report_err(ret, I2C_ERR_WRITE);
#endif

	/*
	 * Length is the number of objects, not number of bytes.
	 */
	length = 1;
	length = simple_strtoul(argv[3], NULL, 16);
	if (length > sizeof(bytes))
		length = sizeof(bytes);

	/*
	 * The delay time (uSec) is optional.
	 */
	delay = 1000;
	if (argc > 3)
		delay = simple_strtoul(argv[4], NULL, 10);
	/*
	 * Run the loop...
	 */
	while (1) {
#ifdef CONFIG_DM_I2C
		ret = dm_i2c_read(dev, addr, bytes, length);
#else
		ret = i2c_read(chip, addr, alen, bytes, length);
#endif
		if (ret)
			i2c_report_err(ret, I2C_ERR_READ);
		udelay(delay);
	}

	/* NOTREACHED */
	return 0;
}

/*
 * The SDRAM command is separately configured because many
 * (most?) embedded boards don't use SDRAM DIMMs.
 *
 * FIXME: Document and probably move elsewhere!
 */
#if defined(CONFIG_CMD_SDRAM)
static void print_ddr2_tcyc (u_char const b)
{
	printf ("%d.", (b >> 4) & 0x0F);
	switch (b & 0x0F) {
	case 0x0:
	case 0x1:
	case 0x2:
	case 0x3:
	case 0x4:
	case 0x5:
	case 0x6:
	case 0x7:
	case 0x8:
	case 0x9:
		printf ("%d ns\n", b & 0x0F);
		break;
	case 0xA:
		puts ("25 ns\n");
		break;
	case 0xB:
		puts ("33 ns\n");
		break;
	case 0xC:
		puts ("66 ns\n");
		break;
	case 0xD:
		puts ("75 ns\n");
		break;
	default:
		puts ("?? ns\n");
		break;
	}
}

static void decode_bits (u_char const b, char const *str[], int const do_once)
{
	u_char mask;

	for (mask = 0x80; mask != 0x00; mask >>= 1, ++str) {
		if (b & mask) {
			puts (*str);
			if (do_once)
				return;
		}
	}
}

/*
 * Syntax:
 *	i2c sdram {i2c_chip}
 */
static int do_sdram (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
{
	enum { unknown, EDO, SDRAM, DDR2 } type;

	uint	chip;
	u_char	data[128];
	u_char	cksum;
	int	j;

	static const char *decode_CAS_DDR2[] = {
		" TBD", " 6", " 5", " 4", " 3", " 2", " TBD", " TBD"
	};

	static const char *decode_CAS_default[] = {
		" TBD", " 7", " 6", " 5", " 4", " 3", " 2", " 1"
	};

	static const char *decode_CS_WE_default[] = {
		" TBD", " 6", " 5", " 4", " 3", " 2", " 1", " 0"
	};

	static const char *decode_byte21_default[] = {
		"  TBD (bit 7)\n",
		"  Redundant row address\n",
		"  Differential clock input\n",
		"  Registerd DQMB inputs\n",
		"  Buffered DQMB inputs\n",
		"  On-card PLL\n",
		"  Registered address/control lines\n",
		"  Buffered address/control lines\n"
	};

	static const char *decode_byte22_DDR2[] = {
		"  TBD (bit 7)\n",
		"  TBD (bit 6)\n",
		"  TBD (bit 5)\n",
		"  TBD (bit 4)\n",
		"  TBD (bit 3)\n",
		"  Supports partial array self refresh\n",
		"  Supports 50 ohm ODT\n",
		"  Supports weak driver\n"
	};

	static const char *decode_row_density_DDR2[] = {
		"512 MiB", "256 MiB", "128 MiB", "16 GiB",
		"8 GiB", "4 GiB", "2 GiB", "1 GiB"
	};

	static const char *decode_row_density_default[] = {
		"512 MiB", "256 MiB", "128 MiB", "64 MiB",
		"32 MiB", "16 MiB", "8 MiB", "4 MiB"
	};

	if (argc < 2)
		return CMD_RET_USAGE;

	/*
	 * Chip is always specified.
	 */
	chip = simple_strtoul (argv[1], NULL, 16);

	if (i2c_read (chip, 0, 1, data, sizeof (data)) != 0) {
		puts ("No SDRAM Serial Presence Detect found.\n");
		return 1;
	}

	cksum = 0;
	for (j = 0; j < 63; j++) {
		cksum += data[j];
	}
	if (cksum != data[63]) {
		printf ("WARNING: Configuration data checksum failure:\n"
			"  is 0x%02x, calculated 0x%02x\n", data[63], cksum);
	}
	printf ("SPD data revision            %d.%d\n",
		(data[62] >> 4) & 0x0F, data[62] & 0x0F);
	printf ("Bytes used                   0x%02X\n", data[0]);
	printf ("Serial memory size           0x%02X\n", 1 << data[1]);

	puts ("Memory type                  ");
	switch (data[2]) {
	case 2:
		type = EDO;
		puts ("EDO\n");
		break;
	case 4:
		type = SDRAM;
		puts ("SDRAM\n");
		break;
	case 8:
		type = DDR2;
		puts ("DDR2\n");
		break;
	default:
		type = unknown;
		puts ("unknown\n");
		break;
	}

	puts ("Row address bits             ");
	if ((data[3] & 0x00F0) == 0)
		printf ("%d\n", data[3] & 0x0F);
	else
		printf ("%d/%d\n", data[3] & 0x0F, (data[3] >> 4) & 0x0F);

	puts ("Column address bits          ");
	if ((data[4] & 0x00F0) == 0)
		printf ("%d\n", data[4] & 0x0F);
	else
		printf ("%d/%d\n", data[4] & 0x0F, (data[4] >> 4) & 0x0F);

	switch (type) {
	case DDR2:
		printf ("Number of ranks              %d\n",
			(data[5] & 0x07) + 1);
		break;
	default:
		printf ("Module rows                  %d\n", data[5]);
		break;
	}

	switch (type) {
	case DDR2:
		printf ("Module data width            %d bits\n", data[6]);
		break;
	default:
		printf ("Module data width            %d bits\n",
			(data[7] << 8) | data[6]);
		break;
	}

	puts ("Interface signal levels      ");
	switch(data[8]) {
		case 0:  puts ("TTL 5.0 V\n");	break;
		case 1:  puts ("LVTTL\n");	break;
		case 2:  puts ("HSTL 1.5 V\n");	break;
		case 3:  puts ("SSTL 3.3 V\n");	break;
		case 4:  puts ("SSTL 2.5 V\n");	break;
		case 5:  puts ("SSTL 1.8 V\n");	break;
		default: puts ("unknown\n");	break;
	}

	switch (type) {
	case DDR2:
		printf ("SDRAM cycle time             ");
		print_ddr2_tcyc (data[9]);
		break;
	default:
		printf ("SDRAM cycle time             %d.%d ns\n",
			(data[9] >> 4) & 0x0F, data[9] & 0x0F);
		break;
	}

	switch (type) {
	case DDR2:
		printf ("SDRAM access time            0.%d%d ns\n",
			(data[10] >> 4) & 0x0F, data[10] & 0x0F);
		break;
	default:
		printf ("SDRAM access time            %d.%d ns\n",
			(data[10] >> 4) & 0x0F, data[10] & 0x0F);
		break;
	}

	puts ("EDC configuration            ");
	switch (data[11]) {
		case 0:  puts ("None\n");	break;
		case 1:  puts ("Parity\n");	break;
		case 2:  puts ("ECC\n");	break;
		default: puts ("unknown\n");	break;
	}

	if ((data[12] & 0x80) == 0)
		puts ("No self refresh, rate        ");
	else
		puts ("Self refresh, rate           ");

	switch(data[12] & 0x7F) {
		case 0:  puts ("15.625 us\n");	break;
		case 1:  puts ("3.9 us\n");	break;
		case 2:  puts ("7.8 us\n");	break;
		case 3:  puts ("31.3 us\n");	break;
		case 4:  puts ("62.5 us\n");	break;
		case 5:  puts ("125 us\n");	break;
		default: puts ("unknown\n");	break;
	}

	switch (type) {
	case DDR2:
		printf ("SDRAM width (primary)        %d\n", data[13]);
		break;
	default:
		printf ("SDRAM width (primary)        %d\n", data[13] & 0x7F);
		if ((data[13] & 0x80) != 0) {
			printf ("  (second bank)              %d\n",
				2 * (data[13] & 0x7F));
		}
		break;
	}

	switch (type) {
	case DDR2:
		if (data[14] != 0)
			printf ("EDC width                    %d\n", data[14]);
		break;
	default:
		if (data[14] != 0) {
			printf ("EDC width                    %d\n",
				data[14] & 0x7F);

			if ((data[14] & 0x80) != 0) {
				printf ("  (second bank)              %d\n",
					2 * (data[14] & 0x7F));
			}
		}
		break;
	}

	if (DDR2 != type) {
		printf ("Min clock delay, back-to-back random column addresses "
			"%d\n", data[15]);
	}

	puts ("Burst length(s)             ");
	if (data[16] & 0x80) puts (" Page");
	if (data[16] & 0x08) puts (" 8");
	if (data[16] & 0x04) puts (" 4");
	if (data[16] & 0x02) puts (" 2");
	if (data[16] & 0x01) puts (" 1");
	putc ('\n');
	printf ("Number of banks              %d\n", data[17]);

	switch (type) {
	case DDR2:
		puts ("CAS latency(s)              ");
		decode_bits (data[18], decode_CAS_DDR2, 0);
		putc ('\n');
		break;
	default:
		puts ("CAS latency(s)              ");
		decode_bits (data[18], decode_CAS_default, 0);
		putc ('\n');
		break;
	}

	if (DDR2 != type) {
		puts ("CS latency(s)               ");
		decode_bits (data[19], decode_CS_WE_default, 0);
		putc ('\n');
	}

	if (DDR2 != type) {
		puts ("WE latency(s)               ");
		decode_bits (data[20], decode_CS_WE_default, 0);
		putc ('\n');
	}

	switch (type) {
	case DDR2:
		puts ("Module attributes:\n");
		if (data[21] & 0x80)
			puts ("  TBD (bit 7)\n");
		if (data[21] & 0x40)
			puts ("  Analysis probe installed\n");
		if (data[21] & 0x20)
			puts ("  TBD (bit 5)\n");
		if (data[21] & 0x10)
			puts ("  FET switch external enable\n");
		printf ("  %d PLLs on DIMM\n", (data[21] >> 2) & 0x03);
		if (data[20] & 0x11) {
			printf ("  %d active registers on DIMM\n",
				(data[21] & 0x03) + 1);
		}
		break;
	default:
		puts ("Module attributes:\n");
		if (!data[21])
			puts ("  (none)\n");
		else
			decode_bits (data[21], decode_byte21_default, 0);
		break;
	}

	switch (type) {
	case DDR2:
		decode_bits (data[22], decode_byte22_DDR2, 0);
		break;
	default:
		puts ("Device attributes:\n");
		if (data[22] & 0x80) puts ("  TBD (bit 7)\n");
		if (data[22] & 0x40) puts ("  TBD (bit 6)\n");
		if (data[22] & 0x20) puts ("  Upper Vcc tolerance 5%\n");
		else                 puts ("  Upper Vcc tolerance 10%\n");
		if (data[22] & 0x10) puts ("  Lower Vcc tolerance 5%\n");
		else                 puts ("  Lower Vcc tolerance 10%\n");
		if (data[22] & 0x08) puts ("  Supports write1/read burst\n");
		if (data[22] & 0x04) puts ("  Supports precharge all\n");
		if (data[22] & 0x02) puts ("  Supports auto precharge\n");
		if (data[22] & 0x01) puts ("  Supports early RAS# precharge\n");
		break;
	}

	switch (type) {
	case DDR2:
		printf ("SDRAM cycle time (2nd highest CAS latency)        ");
		print_ddr2_tcyc (data[23]);
		break;
	default:
		printf ("SDRAM cycle time (2nd highest CAS latency)        %d."
			"%d ns\n", (data[23] >> 4) & 0x0F, data[23] & 0x0F);
		break;
	}

	switch (type) {
	case DDR2:
		printf ("SDRAM access from clock (2nd highest CAS latency) 0."
			"%d%d ns\n", (data[24] >> 4) & 0x0F, data[24] & 0x0F);
		break;
	default:
		printf ("SDRAM access from clock (2nd highest CAS latency) %d."
			"%d ns\n", (data[24] >> 4) & 0x0F, data[24] & 0x0F);
		break;
	}

	switch (type) {
	case DDR2:
		printf ("SDRAM cycle time (3rd highest CAS latency)        ");
		print_ddr2_tcyc (data[25]);
		break;
	default:
		printf ("SDRAM cycle time (3rd highest CAS latency)        %d."
			"%d ns\n", (data[25] >> 4) & 0x0F, data[25] & 0x0F);
		break;
	}

	switch (type) {
	case DDR2:
		printf ("SDRAM access from clock (3rd highest CAS latency) 0."
			"%d%d ns\n", (data[26] >> 4) & 0x0F, data[26] & 0x0F);
		break;
	default:
		printf ("SDRAM access from clock (3rd highest CAS latency) %d."
			"%d ns\n", (data[26] >> 4) & 0x0F, data[26] & 0x0F);
		break;
	}

	switch (type) {
	case DDR2:
		printf ("Minimum row precharge        %d.%02d ns\n",
			(data[27] >> 2) & 0x3F, 25 * (data[27] & 0x03));
		break;
	default:
		printf ("Minimum row precharge        %d ns\n", data[27]);
		break;
	}

	switch (type) {
	case DDR2:
		printf ("Row active to row active min %d.%02d ns\n",
			(data[28] >> 2) & 0x3F, 25 * (data[28] & 0x03));
		break;
	default:
		printf ("Row active to row active min %d ns\n", data[28]);
		break;
	}

	switch (type) {
	case DDR2:
		printf ("RAS to CAS delay min         %d.%02d ns\n",
			(data[29] >> 2) & 0x3F, 25 * (data[29] & 0x03));
		break;
	default:
		printf ("RAS to CAS delay min         %d ns\n", data[29]);
		break;
	}

	printf ("Minimum RAS pulse width      %d ns\n", data[30]);

	switch (type) {
	case DDR2:
		puts ("Density of each row          ");
		decode_bits (data[31], decode_row_density_DDR2, 1);
		putc ('\n');
		break;
	default:
		puts ("Density of each row          ");
		decode_bits (data[31], decode_row_density_default, 1);
		putc ('\n');
		break;
	}

	switch (type) {
	case DDR2:
		puts ("Command and Address setup    ");
		if (data[32] >= 0xA0) {
			printf ("1.%d%d ns\n",
				((data[32] >> 4) & 0x0F) - 10, data[32] & 0x0F);
		} else {
			printf ("0.%d%d ns\n",
				((data[32] >> 4) & 0x0F), data[32] & 0x0F);
		}
		break;
	default:
		printf ("Command and Address setup    %c%d.%d ns\n",
			(data[32] & 0x80) ? '-' : '+',
			(data[32] >> 4) & 0x07, data[32] & 0x0F);
		break;
	}

	switch (type) {
	case DDR2:
		puts ("Command and Address hold     ");
		if (data[33] >= 0xA0) {
			printf ("1.%d%d ns\n",
				((data[33] >> 4) & 0x0F) - 10, data[33] & 0x0F);
		} else {
			printf ("0.%d%d ns\n",
				((data[33] >> 4) & 0x0F), data[33] & 0x0F);
		}
		break;
	default:
		printf ("Command and Address hold     %c%d.%d ns\n",
			(data[33] & 0x80) ? '-' : '+',
			(data[33] >> 4) & 0x07, data[33] & 0x0F);
		break;
	}

	switch (type) {
	case DDR2:
		printf ("Data signal input setup      0.%d%d ns\n",
			(data[34] >> 4) & 0x0F, data[34] & 0x0F);
		break;
	default:
		printf ("Data signal input setup      %c%d.%d ns\n",
			(data[34] & 0x80) ? '-' : '+',
			(data[34] >> 4) & 0x07, data[34] & 0x0F);
		break;
	}

	switch (type) {
	case DDR2:
		printf ("Data signal input hold       0.%d%d ns\n",
			(data[35] >> 4) & 0x0F, data[35] & 0x0F);
		break;
	default:
		printf ("Data signal input hold       %c%d.%d ns\n",
			(data[35] & 0x80) ? '-' : '+',
			(data[35] >> 4) & 0x07, data[35] & 0x0F);
		break;
	}

	puts ("Manufacturer's JEDEC ID      ");
	for (j = 64; j <= 71; j++)
		printf ("%02X ", data[j]);
	putc ('\n');
	printf ("Manufacturing Location       %02X\n", data[72]);
	puts ("Manufacturer's Part Number   ");
	for (j = 73; j <= 90; j++)
		printf ("%02X ", data[j]);
	putc ('\n');
	printf ("Revision Code                %02X %02X\n", data[91], data[92]);
	printf ("Manufacturing Date           %02X %02X\n", data[93], data[94]);
	puts ("Assembly Serial Number       ");
	for (j = 95; j <= 98; j++)
		printf ("%02X ", data[j]);
	putc ('\n');

	if (DDR2 != type) {
		printf ("Speed rating                 PC%d\n",
			data[126] == 0x66 ? 66 : data[126]);
	}
	return 0;
}
#endif

/*
 * Syntax:
 *	i2c edid {i2c_chip}
 */
#if defined(CONFIG_I2C_EDID)
int do_edid(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
{
	uint chip;
	struct edid1_info edid;
	int ret;
#ifdef CONFIG_DM_I2C
	struct udevice *dev;
#endif

	if (argc < 2) {
		cmd_usage(cmdtp);
		return 1;
	}

	chip = simple_strtoul(argv[1], NULL, 16);
#ifdef CONFIG_DM_I2C
	ret = i2c_get_cur_bus_chip(chip, &dev);
	if (!ret)
		ret = dm_i2c_read(dev, 0, (uchar *)&edid, sizeof(edid));
#else
	ret = i2c_read(chip, 0, 1, (uchar *)&edid, sizeof(edid));
#endif
	if (ret)
		return i2c_report_err(ret, I2C_ERR_READ);

	if (edid_check_info(&edid)) {
		puts("Content isn't valid EDID.\n");
		return 1;
	}

	edid_print_info(&edid);
	return 0;

}
#endif /* CONFIG_I2C_EDID */

#ifdef CONFIG_DM_I2C
static void show_bus(struct udevice *bus)
{
	struct udevice *dev;

	printf("Bus %d:\t%s", bus->req_seq, bus->name);
	if (device_active(bus))
		printf("  (active %d)", bus->seq);
	printf("\n");
	for (device_find_first_child(bus, &dev);
	     dev;
	     device_find_next_child(&dev)) {
		struct dm_i2c_chip *chip = dev_get_parent_platdata(dev);

		printf("   %02x: %s, offset len %x, flags %x\n",
		       chip->chip_addr, dev->name, chip->offset_len,
		       chip->flags);
	}
}
#endif

/**
 * do_i2c_show_bus() - Handle the "i2c bus" command-line command
 * @cmdtp:	Command data struct pointer
 * @flag:	Command flag
 * @argc:	Command-line argument count
 * @argv:	Array of command-line arguments
 *
 * Returns zero always.
 */
#if defined(CONFIG_SYS_I2C) || defined(CONFIG_DM_I2C)
static int do_i2c_show_bus(cmd_tbl_t *cmdtp, int flag, int argc,
				char * const argv[])
{
	if (argc == 1) {
		/* show all busses */
#ifdef CONFIG_DM_I2C
		struct udevice *bus;
		struct uclass *uc;
		int ret;

		ret = uclass_get(UCLASS_I2C, &uc);
		if (ret)
			return CMD_RET_FAILURE;
		uclass_foreach_dev(bus, uc)
			show_bus(bus);
#else
		int i;

		for (i = 0; i < CONFIG_SYS_NUM_I2C_BUSES; i++) {
			printf("Bus %d:\t%s", i, I2C_ADAP_NR(i)->name);
#ifndef CONFIG_SYS_I2C_DIRECT_BUS
			int j;

			for (j = 0; j < CONFIG_SYS_I2C_MAX_HOPS; j++) {
				if (i2c_bus[i].next_hop[j].chip == 0)
					break;
				printf("->%s@0x%2x:%d",
				       i2c_bus[i].next_hop[j].mux.name,
				       i2c_bus[i].next_hop[j].chip,
				       i2c_bus[i].next_hop[j].channel);
			}
#endif
			printf("\n");
		}
#endif
	} else {
		int i;

		/* show specific bus */
		i = simple_strtoul(argv[1], NULL, 10);
#ifdef CONFIG_DM_I2C
		struct udevice *bus;
		int ret;

		ret = uclass_get_device_by_seq(UCLASS_I2C, i, &bus);
		if (ret) {
			printf("Invalid bus %d: err=%d\n", i, ret);
			return CMD_RET_FAILURE;
		}
		show_bus(bus);
#else
		if (i >= CONFIG_SYS_NUM_I2C_BUSES) {
			printf("Invalid bus %d\n", i);
			return -1;
		}
		printf("Bus %d:\t%s", i, I2C_ADAP_NR(i)->name);
#ifndef CONFIG_SYS_I2C_DIRECT_BUS
			int j;
			for (j = 0; j < CONFIG_SYS_I2C_MAX_HOPS; j++) {
				if (i2c_bus[i].next_hop[j].chip == 0)
					break;
				printf("->%s@0x%2x:%d",
				       i2c_bus[i].next_hop[j].mux.name,
				       i2c_bus[i].next_hop[j].chip,
				       i2c_bus[i].next_hop[j].channel);
			}
#endif
		printf("\n");
#endif
	}

	return 0;
}
#endif

/**
 * do_i2c_bus_num() - Handle the "i2c dev" command-line command
 * @cmdtp:	Command data struct pointer
 * @flag:	Command flag
 * @argc:	Command-line argument count
 * @argv:	Array of command-line arguments
 *
 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
 * on error.
 */
#if defined(CONFIG_SYS_I2C) || defined(CONFIG_I2C_MULTI_BUS) || \
		defined(CONFIG_DM_I2C)
static int do_i2c_bus_num(cmd_tbl_t *cmdtp, int flag, int argc,
				char * const argv[])
{
	int		ret = 0;
	int	bus_no;

	if (argc == 1) {
		/* querying current setting */
#ifdef CONFIG_DM_I2C
		struct udevice *bus;

		if (!i2c_get_cur_bus(&bus))
			bus_no = bus->seq;
		else
			bus_no = -1;
#else
		bus_no = i2c_get_bus_num();
#endif
		printf("Current bus is %d\n", bus_no);
	} else {
		bus_no = simple_strtoul(argv[1], NULL, 10);
#if defined(CONFIG_SYS_I2C)
		if (bus_no >= CONFIG_SYS_NUM_I2C_BUSES) {
			printf("Invalid bus %d\n", bus_no);
			return -1;
		}
#endif
		printf("Setting bus to %d\n", bus_no);
#ifdef CONFIG_DM_I2C
		ret = cmd_i2c_set_bus_num(bus_no);
#else
		ret = i2c_set_bus_num(bus_no);
#endif
		if (ret)
			printf("Failure changing bus number (%d)\n", ret);
	}
	return ret;
}
#endif  /* defined(CONFIG_SYS_I2C) */

/**
 * do_i2c_bus_speed() - Handle the "i2c speed" command-line command
 * @cmdtp:	Command data struct pointer
 * @flag:	Command flag
 * @argc:	Command-line argument count
 * @argv:	Array of command-line arguments
 *
 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
 * on error.
 */
static int do_i2c_bus_speed(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
{
	int speed, ret=0;

#ifdef CONFIG_DM_I2C
	struct udevice *bus;

	if (i2c_get_cur_bus(&bus))
		return 1;
#endif
	if (argc == 1) {
#ifdef CONFIG_DM_I2C
		speed = dm_i2c_get_bus_speed(bus);
#else
		speed = i2c_get_bus_speed();
#endif
		/* querying current speed */
		printf("Current bus speed=%d\n", speed);
	} else {
		speed = simple_strtoul(argv[1], NULL, 10);
		printf("Setting bus speed to %d Hz\n", speed);
#ifdef CONFIG_DM_I2C
		ret = dm_i2c_set_bus_speed(bus, speed);
#else
		ret = i2c_set_bus_speed(speed);
#endif
		if (ret)
			printf("Failure changing bus speed (%d)\n", ret);
	}
	return ret;
}

/**
 * do_i2c_mm() - Handle the "i2c mm" command-line command
 * @cmdtp:	Command data struct pointer
 * @flag:	Command flag
 * @argc:	Command-line argument count
 * @argv:	Array of command-line arguments
 *
 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
 * on error.
 */
static int do_i2c_mm(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
{
	return mod_i2c_mem (cmdtp, 1, flag, argc, argv);
}

/**
 * do_i2c_nm() - Handle the "i2c nm" command-line command
 * @cmdtp:	Command data struct pointer
 * @flag:	Command flag
 * @argc:	Command-line argument count
 * @argv:	Array of command-line arguments
 *
 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
 * on error.
 */
static int do_i2c_nm(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
{
	return mod_i2c_mem (cmdtp, 0, flag, argc, argv);
}

/**
 * do_i2c_reset() - Handle the "i2c reset" command-line command
 * @cmdtp:	Command data struct pointer
 * @flag:	Command flag
 * @argc:	Command-line argument count
 * @argv:	Array of command-line arguments
 *
 * Returns zero always.
 */
static int do_i2c_reset(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
{
#if defined(CONFIG_DM_I2C)
	struct udevice *bus;

	if (i2c_get_cur_bus(&bus))
		return CMD_RET_FAILURE;
	if (i2c_deblock(bus)) {
		printf("Error: Not supported by the driver\n");
		return CMD_RET_FAILURE;
	}
#elif defined(CONFIG_SYS_I2C)
	i2c_init(I2C_ADAP->speed, I2C_ADAP->slaveaddr);
#else
	i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
#endif
	return 0;
}

static cmd_tbl_t cmd_i2c_sub[] = {
#if defined(CONFIG_SYS_I2C) || defined(CONFIG_DM_I2C)
	U_BOOT_CMD_MKENT(bus, 1, 1, do_i2c_show_bus, "", ""),
#endif
	U_BOOT_CMD_MKENT(crc32, 3, 1, do_i2c_crc, "", ""),
#if defined(CONFIG_SYS_I2C) || \
	defined(CONFIG_I2C_MULTI_BUS) || defined(CONFIG_DM_I2C)
	U_BOOT_CMD_MKENT(dev, 1, 1, do_i2c_bus_num, "", ""),
#endif  /* CONFIG_I2C_MULTI_BUS */
#if defined(CONFIG_I2C_EDID)
	U_BOOT_CMD_MKENT(edid, 1, 1, do_edid, "", ""),
#endif  /* CONFIG_I2C_EDID */
	U_BOOT_CMD_MKENT(loop, 3, 1, do_i2c_loop, "", ""),
	U_BOOT_CMD_MKENT(md, 3, 1, do_i2c_md, "", ""),
	U_BOOT_CMD_MKENT(mm, 2, 1, do_i2c_mm, "", ""),
	U_BOOT_CMD_MKENT(mw, 3, 1, do_i2c_mw, "", ""),
	U_BOOT_CMD_MKENT(nm, 2, 1, do_i2c_nm, "", ""),
	U_BOOT_CMD_MKENT(probe, 0, 1, do_i2c_probe, "", ""),
	U_BOOT_CMD_MKENT(read, 5, 1, do_i2c_read, "", ""),
	U_BOOT_CMD_MKENT(write, 6, 0, do_i2c_write, "", ""),
#ifdef CONFIG_DM_I2C
	U_BOOT_CMD_MKENT(flags, 2, 1, do_i2c_flags, "", ""),
#endif
	U_BOOT_CMD_MKENT(reset, 0, 1, do_i2c_reset, "", ""),
#if defined(CONFIG_CMD_SDRAM)
	U_BOOT_CMD_MKENT(sdram, 1, 1, do_sdram, "", ""),
#endif
	U_BOOT_CMD_MKENT(speed, 1, 1, do_i2c_bus_speed, "", ""),
};

#ifdef CONFIG_NEEDS_MANUAL_RELOC
void i2c_reloc(void) {
	fixup_cmdtable(cmd_i2c_sub, ARRAY_SIZE(cmd_i2c_sub));
}
#endif

/**
 * do_i2c() - Handle the "i2c" command-line command
 * @cmdtp:	Command data struct pointer
 * @flag:	Command flag
 * @argc:	Command-line argument count
 * @argv:	Array of command-line arguments
 *
 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
 * on error.
 */
static int do_i2c(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
{
	cmd_tbl_t *c;

	if (argc < 2)
		return CMD_RET_USAGE;

	/* Strip off leading 'i2c' command argument */
	argc--;
	argv++;

	c = find_cmd_tbl(argv[0], &cmd_i2c_sub[0], ARRAY_SIZE(cmd_i2c_sub));

	if (c)
		return c->cmd(cmdtp, flag, argc, argv);
	else
		return CMD_RET_USAGE;
}

/***************************************************/
#ifdef CONFIG_SYS_LONGHELP
static char i2c_help_text[] =
#if defined(CONFIG_SYS_I2C) || defined(CONFIG_DM_I2C)
	"bus [muxtype:muxaddr:muxchannel] - show I2C bus info\n"
#endif
	"crc32 chip address[.0, .1, .2] count - compute CRC32 checksum\n"
#if defined(CONFIG_SYS_I2C) || \
	defined(CONFIG_I2C_MULTI_BUS) || defined(CONFIG_DM_I2C)
	"i2c dev [dev] - show or set current I2C bus\n"
#endif  /* CONFIG_I2C_MULTI_BUS */
#if defined(CONFIG_I2C_EDID)
	"i2c edid chip - print EDID configuration information\n"
#endif  /* CONFIG_I2C_EDID */
	"i2c loop chip address[.0, .1, .2] [# of objects] - looping read of device\n"
	"i2c md chip address[.0, .1, .2] [# of objects] - read from I2C device\n"
	"i2c mm chip address[.0, .1, .2] - write to I2C device (auto-incrementing)\n"
	"i2c mw chip address[.0, .1, .2] value [count] - write to I2C device (fill)\n"
	"i2c nm chip address[.0, .1, .2] - write to I2C device (constant address)\n"
	"i2c probe [address] - test for and show device(s) on the I2C bus\n"
	"i2c read chip address[.0, .1, .2] length memaddress - read to memory\n"
	"i2c write memaddress chip address[.0, .1, .2] length [-s] - write memory\n"
	"          to I2C; the -s option selects bulk write in a single transaction\n"
#ifdef CONFIG_DM_I2C
	"i2c flags chip [flags] - set or get chip flags\n"
#endif
	"i2c reset - re-init the I2C Controller\n"
#if defined(CONFIG_CMD_SDRAM)
	"i2c sdram chip - print SDRAM configuration information\n"
#endif
	"i2c speed [speed] - show or set I2C bus speed";
#endif

U_BOOT_CMD(
	i2c, 7, 1, do_i2c,
	"I2C sub-system",
	i2c_help_text
);
OpenPOWER on IntegriCloud