summaryrefslogtreecommitdiff
path: root/drivers/smc91111.c
blob: 69cbb1713da91853b0c68f2d58252e18e1ff8302 (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
/*------------------------------------------------------------------------
 . smc91111.c
 . This is a driver for SMSC's 91C111 single-chip Ethernet device.
 .
 . (C) Copyright 2002
 . Sysgo Real-Time Solutions, GmbH <www.elinos.com>
 . Rolf Offermanns <rof@sysgo.de>
 .
 . Copyright (C) 2001 Standard Microsystems Corporation (SMSC)
 .	 Developed by Simple Network Magic Corporation (SNMC)
 . Copyright (C) 1996 by Erik Stahlman (ES)
 .
 . This program is free software; you can redistribute it and/or modify
 . it under the terms of the GNU General Public License as published by
 . the Free Software Foundation; either version 2 of the License, or
 . (at your option) any later version.
 .
 . This program is distributed in the hope that 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, write to the Free Software
 . Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307	 USA
 .
 . Information contained in this file was obtained from the LAN91C111
 . manual from SMC.  To get a copy, if you really want one, you can find
 . information under www.smsc.com.
 .
 .
 . "Features" of the SMC chip:
 .   Integrated PHY/MAC for 10/100BaseT Operation
 .   Supports internal and external MII
 .   Integrated 8K packet memory
 .   EEPROM interface for configuration
 .
 . Arguments:
 .	io	= for the base address
 .	irq	= for the IRQ
 .
 . author:
 .	Erik Stahlman				( erik@vt.edu )
 .	Daris A Nevil				( dnevil@snmc.com )
 .
 .
 . Hardware multicast code from Peter Cammaert ( pc@denkart.be )
 .
 . Sources:
 .    o	  SMSC LAN91C111 databook (www.smsc.com)
 .    o	  smc9194.c by Erik Stahlman
 .    o	  skeleton.c by Donald Becker ( becker@cesdis.gsfc.nasa.gov )
 .
 . History:
 .	06/19/03  Richard Woodruff Made u-boot environment aware and added mac addr checks.
 .	10/17/01  Marco Hasewinkel Modify for DNP/1110
 .	07/25/01  Woojung Huh	   Modify for ADS Bitsy
 .	04/25/01  Daris A Nevil	   Initial public release through SMSC
 .	03/16/01  Daris A Nevil	   Modified smc9194.c for use with LAN91C111
 ----------------------------------------------------------------------------*/

#include <common.h>
#include <command.h>
#include <config.h>
#include "smc91111.h"
#include <net.h>

#ifdef CONFIG_DRIVER_SMC91111

/* Use power-down feature of the chip */
#define POWER_DOWN	0

#define NO_AUTOPROBE

#define SMC_DEBUG 0

#if SMC_DEBUG > 1
static const char version[] =
	"smc91111.c:v1.0 04/25/01 by Daris A Nevil (dnevil@snmc.com)\n";
#endif

/* Autonegotiation timeout in seconds */
#ifndef CONFIG_SMC_AUTONEG_TIMEOUT
#define CONFIG_SMC_AUTONEG_TIMEOUT 10
#endif

/*------------------------------------------------------------------------
 .
 . Configuration options, for the experienced user to change.
 .
 -------------------------------------------------------------------------*/

/*
 . Wait time for memory to be free.  This probably shouldn't be
 . tuned that much, as waiting for this means nothing else happens
 . in the system
*/
#define MEMORY_WAIT_TIME 16


#if (SMC_DEBUG > 2 )
#define PRINTK3(args...) printf(args)
#else
#define PRINTK3(args...)
#endif

#if SMC_DEBUG > 1
#define PRINTK2(args...) printf(args)
#else
#define PRINTK2(args...)
#endif

#ifdef SMC_DEBUG
#define PRINTK(args...) printf(args)
#else
#define PRINTK(args...)
#endif


/*------------------------------------------------------------------------
 .
 . The internal workings of the driver.	 If you are changing anything
 . here with the SMC stuff, you should have the datasheet and know
 . what you are doing.
 .
 -------------------------------------------------------------------------*/
#define CARDNAME "LAN91C111"

/* Memory sizing constant */
#define LAN91C111_MEMORY_MULTIPLIER	(1024*2)

#ifndef CONFIG_SMC91111_BASE
#define CONFIG_SMC91111_BASE 0x20000300
#endif

#define SMC_BASE_ADDRESS CONFIG_SMC91111_BASE

#define SMC_DEV_NAME "SMC91111"
#define SMC_PHY_ADDR 0x0000
#define SMC_ALLOC_MAX_TRY 5
#define SMC_TX_TIMEOUT 30

#define SMC_PHY_CLOCK_DELAY 1000

#define ETH_ZLEN 60

#ifdef	CONFIG_SMC_USE_32_BIT
#define USE_32_BIT  1
#else
#undef USE_32_BIT
#endif
/*-----------------------------------------------------------------
 .
 .  The driver can be entered at any of the following entry points.
 .
 .------------------------------------------------------------------  */

extern int eth_init(bd_t *bd);
extern void eth_halt(void);
extern int eth_rx(void);
extern int eth_send(volatile void *packet, int length);


/*
 . This is called by  register_netdev().  It is responsible for
 . checking the portlist for the SMC9000 series chipset.  If it finds
 . one, then it will initialize the device, find the hardware information,
 . and sets up the appropriate device parameters.
 . NOTE: Interrupts are *OFF* when this procedure is called.
 .
 . NB:This shouldn't be static since it is referred to externally.
*/
int smc_init(void);

/*
 . This is called by  unregister_netdev().  It is responsible for
 . cleaning up before the driver is finally unregistered and discarded.
*/
void smc_destructor(void);

/*
 . The kernel calls this function when someone wants to use the device,
 . typically 'ifconfig ethX up'.
*/
static int smc_open(bd_t *bd);


/*
 . This is called by the kernel in response to 'ifconfig ethX down'.  It
 . is responsible for cleaning up everything that the open routine
 . does, and maybe putting the card into a powerdown state.
*/
static int smc_close(void);

/*
 . Configures the PHY through the MII Management interface
*/
#ifndef CONFIG_SMC91111_EXT_PHY
static void smc_phy_configure(void);
#endif /* !CONFIG_SMC91111_EXT_PHY */

/*
 . This is a separate procedure to handle the receipt of a packet, to
 . leave the interrupt code looking slightly cleaner
*/
static int smc_rcv(void);

/* See if a MAC address is defined in the current environment. If so use it. If not
 . print a warning and set the environment and other globals with the default.
 . If an EEPROM is present it really should be consulted.
*/
int smc_get_ethaddr(bd_t *bd);
int get_rom_mac(char *v_rom_mac);

/*
 ------------------------------------------------------------
 .
 . Internal routines
 .
 ------------------------------------------------------------
*/

#ifdef CONFIG_SMC_USE_IOFUNCS
/*
 * input and output functions
 *
 * Implemented due to inx,outx macros accessing the device improperly
 * and putting the device into an unkown state.
 *
 * For instance, on Sharp LPD7A400 SDK, affects were chip memory
 * could not be free'd (hence the alloc failures), duplicate packets,
 * packets being corrupt (shifted) on the wire, etc.  Switching to the
 * inx,outx functions fixed this problem.
 */
static inline word SMC_inw(dword offset);
static inline void SMC_outw(word value, dword offset);
static inline byte SMC_inb(dword offset);
static inline void SMC_outb(byte value, dword offset);
static inline void SMC_insw(dword offset, volatile uchar* buf, dword len);
static inline void SMC_outsw(dword offset, uchar* buf, dword len);

#define barrier() __asm__ __volatile__("": : :"memory")

static inline word SMC_inw(dword offset)
{
	word v;
	v = *((volatile word*)(SMC_BASE_ADDRESS+offset));
	barrier(); *(volatile u32*)(0xc0000000);
	return v;
}

static inline void SMC_outw(word value, dword offset)
{
	*((volatile word*)(SMC_BASE_ADDRESS+offset)) = value;
	barrier(); *(volatile u32*)(0xc0000000);
}

static inline byte SMC_inb(dword offset)
{
	word  _w;

	_w = SMC_inw(offset & ~((dword)1));
	return (offset & 1) ? (byte)(_w >> 8) : (byte)(_w);
}

static inline void SMC_outb(byte value, dword offset)
{
	word  _w;

	_w = SMC_inw(offset & ~((dword)1));
	if (offset & 1)
			*((volatile word*)(SMC_BASE_ADDRESS+(offset & ~((dword)1)))) = (value<<8) | (_w & 0x00ff);
	else
			*((volatile word*)(SMC_BASE_ADDRESS+offset)) = value | (_w & 0xff00);
}

static inline void SMC_insw(dword offset, volatile uchar* buf, dword len)
{
	while (len-- > 0) {
		*((word*)buf)++ = SMC_inw(offset);
		barrier(); *((volatile u32*)(0xc0000000));
	}
}

static inline void SMC_outsw(dword offset, uchar* buf, dword len)
{
	while (len-- > 0) {
		SMC_outw(*((word*)buf)++, offset);
		barrier(); *(volatile u32*)(0xc0000000);
	}
}
#endif  /* CONFIG_SMC_USE_IOFUNCS */

static char unsigned smc_mac_addr[6] = {0x02, 0x80, 0xad, 0x20, 0x31, 0xb8};

/*
 * This function must be called before smc_open() if you want to override
 * the default mac address.
 */

void smc_set_mac_addr(const char *addr) {
	int i;

	for (i=0; i < sizeof(smc_mac_addr); i++){
		smc_mac_addr[i] = addr[i];
	}
}

/*
 * smc_get_macaddr is no longer used. If you want to override the default
 * mac address, call smc_get_mac_addr as a part of the board initialization.
 */

#if 0
void smc_get_macaddr( byte *addr ) {
	/* MAC ADDRESS AT FLASHBLOCK 1 / OFFSET 0x10 */
	unsigned char *dnp1110_mac = (unsigned char *) (0xE8000000 + 0x20010);
	int i;


	for (i=0; i<6; i++) {
	    addr[0] = *(dnp1110_mac+0);
	    addr[1] = *(dnp1110_mac+1);
	    addr[2] = *(dnp1110_mac+2);
	    addr[3] = *(dnp1110_mac+3);
	    addr[4] = *(dnp1110_mac+4);
	    addr[5] = *(dnp1110_mac+5);
	}
}
#endif /* 0 */

/***********************************************
 * Show available memory		       *
 ***********************************************/
void dump_memory_info(void)
{
	word mem_info;
	word old_bank;

	old_bank = SMC_inw(BANK_SELECT)&0xF;

	SMC_SELECT_BANK(0);
	mem_info = SMC_inw( MIR_REG );
	PRINTK2("Memory: %4d available\n", (mem_info >> 8)*2048);

	SMC_SELECT_BANK(old_bank);
}
/*
 . A rather simple routine to print out a packet for debugging purposes.
*/
#if SMC_DEBUG > 2
static void print_packet( byte *, int );
#endif

#define tx_done(dev) 1


/* this does a soft reset on the device */
static void smc_reset( void );

/* Enable Interrupts, Receive, and Transmit */
static void smc_enable( void );

/* this puts the device in an inactive state */
static void smc_shutdown( void );

/* Routines to Read and Write the PHY Registers across the
   MII Management Interface
*/

#ifndef CONFIG_SMC91111_EXT_PHY
static word smc_read_phy_register(byte phyreg);
static void smc_write_phy_register(byte phyreg, word phydata);
#endif /* !CONFIG_SMC91111_EXT_PHY */


static int poll4int (byte mask, int timeout)
{
	int tmo = get_timer (0) + timeout * CFG_HZ;
	int is_timeout = 0;
	word old_bank = SMC_inw (BSR_REG);

	PRINTK2 ("Polling...\n");
	SMC_SELECT_BANK (2);
	while ((SMC_inw (SMC91111_INT_REG) & mask) == 0) {
		if (get_timer (0) >= tmo) {
			is_timeout = 1;
			break;
		}
	}

	/* restore old bank selection */
	SMC_SELECT_BANK (old_bank);

	if (is_timeout)
		return 1;
	else
		return 0;
}

/* Only one release command at a time, please */
static inline void smc_wait_mmu_release_complete (void)
{
	int count = 0;

	/* assume bank 2 selected */
	while (SMC_inw (MMU_CMD_REG) & MC_BUSY) {
		udelay (1);	/* Wait until not busy */
		if (++count > 200)
			break;
	}
}

/*
 . Function: smc_reset( void )
 . Purpose:
 .	This sets the SMC91111 chip to its normal state, hopefully from whatever
 .	mess that any other DOS driver has put it in.
 .
 . Maybe I should reset more registers to defaults in here?  SOFTRST  should
 . do that for me.
 .
 . Method:
 .	1.  send a SOFT RESET
 .	2.  wait for it to finish
 .	3.  enable autorelease mode
 .	4.  reset the memory management unit
 .	5.  clear all interrupts
 .
*/
static void smc_reset (void)
{
	PRINTK2 ("%s: smc_reset\n", SMC_DEV_NAME);

	/* This resets the registers mostly to defaults, but doesn't
	   affect EEPROM.  That seems unnecessary */
	SMC_SELECT_BANK (0);
	SMC_outw (RCR_SOFTRST, RCR_REG);

	/* Setup the Configuration Register */
	/* This is necessary because the CONFIG_REG is not affected */
	/* by a soft reset */

	SMC_SELECT_BANK (1);
#if defined(CONFIG_SMC91111_EXT_PHY)
	SMC_outw (CONFIG_DEFAULT | CONFIG_EXT_PHY, CONFIG_REG);
#else
	SMC_outw (CONFIG_DEFAULT, CONFIG_REG);
#endif


	/* Release from possible power-down state */
	/* Configuration register is not affected by Soft Reset */
	SMC_outw (SMC_inw (CONFIG_REG) | CONFIG_EPH_POWER_EN, CONFIG_REG);

	SMC_SELECT_BANK (0);

	/* this should pause enough for the chip to be happy */
	udelay (10);

	/* Disable transmit and receive functionality */
	SMC_outw (RCR_CLEAR, RCR_REG);
	SMC_outw (TCR_CLEAR, TCR_REG);

	/* set the control register */
	SMC_SELECT_BANK (1);
	SMC_outw (CTL_DEFAULT, CTL_REG);

	/* Reset the MMU */
	SMC_SELECT_BANK (2);
	smc_wait_mmu_release_complete ();
	SMC_outw (MC_RESET, MMU_CMD_REG);
	while (SMC_inw (MMU_CMD_REG) & MC_BUSY)
		udelay (1);	/* Wait until not busy */

	/* Note:  It doesn't seem that waiting for the MMU busy is needed here,
	   but this is a place where future chipsets _COULD_ break.  Be wary
	   of issuing another MMU command right after this */

	/* Disable all interrupts */
	SMC_outb (0, IM_REG);
}

/*
 . Function: smc_enable
 . Purpose: let the chip talk to the outside work
 . Method:
 .	1.  Enable the transmitter
 .	2.  Enable the receiver
 .	3.  Enable interrupts
*/
static void smc_enable()
{
	PRINTK2("%s: smc_enable\n", SMC_DEV_NAME);
	SMC_SELECT_BANK( 0 );
	/* see the header file for options in TCR/RCR DEFAULT*/
	SMC_outw( TCR_DEFAULT, TCR_REG );
	SMC_outw( RCR_DEFAULT, RCR_REG );

	/* clear MII_DIS */
/*	smc_write_phy_register(PHY_CNTL_REG, 0x0000); */
}

/*
 . Function: smc_shutdown
 . Purpose:  closes down the SMC91xxx chip.
 . Method:
 .	1. zero the interrupt mask
 .	2. clear the enable receive flag
 .	3. clear the enable xmit flags
 .
 . TODO:
 .   (1) maybe utilize power down mode.
 .	Why not yet?  Because while the chip will go into power down mode,
 .	the manual says that it will wake up in response to any I/O requests
 .	in the register space.	 Empirical results do not show this working.
*/
static void smc_shutdown()
{
	PRINTK2(CARDNAME ": smc_shutdown\n");

	/* no more interrupts for me */
	SMC_SELECT_BANK( 2 );
	SMC_outb( 0, IM_REG );

	/* and tell the card to stay away from that nasty outside world */
	SMC_SELECT_BANK( 0 );
	SMC_outb( RCR_CLEAR, RCR_REG );
	SMC_outb( TCR_CLEAR, TCR_REG );
}


/*
 . Function:  smc_hardware_send_packet(struct net_device * )
 . Purpose:
 .	This sends the actual packet to the SMC9xxx chip.
 .
 . Algorithm:
 .	First, see if a saved_skb is available.
 .		( this should NOT be called if there is no 'saved_skb'
 .	Now, find the packet number that the chip allocated
 .	Point the data pointers at it in memory
 .	Set the length word in the chip's memory
 .	Dump the packet to chip memory
 .	Check if a last byte is needed ( odd length packet )
 .		if so, set the control flag right
 .	Tell the card to send it
 .	Enable the transmit interrupt, so I know if it failed
 .	Free the kernel data if I actually sent it.
*/
static int smc_send_packet (volatile void *packet, int packet_length)
{
	byte packet_no;
	unsigned long ioaddr;
	byte *buf;
	int length;
	int numPages;
	int try = 0;
	int time_out;
	byte status;
	byte saved_pnr;
	word saved_ptr;

	/* save PTR and PNR registers before manipulation */
	SMC_SELECT_BANK (2);
	saved_pnr = SMC_inb( PN_REG );
	saved_ptr = SMC_inw( PTR_REG );

	PRINTK3 ("%s: smc_hardware_send_packet\n", SMC_DEV_NAME);

	length = ETH_ZLEN < packet_length ? packet_length : ETH_ZLEN;

	/* allocate memory
	 ** The MMU wants the number of pages to be the number of 256 bytes
	 ** 'pages', minus 1 ( since a packet can't ever have 0 pages :) )
	 **
	 ** The 91C111 ignores the size bits, but the code is left intact
	 ** for backwards and future compatibility.
	 **
	 ** Pkt size for allocating is data length +6 (for additional status
	 ** words, length and ctl!)
	 **
	 ** If odd size then last byte is included in this header.
	 */
	numPages = ((length & 0xfffe) + 6);
	numPages >>= 8;		/* Divide by 256 */

	if (numPages > 7) {
		printf ("%s: Far too big packet error. \n", SMC_DEV_NAME);
		return 0;
	}

	/* now, try to allocate the memory */
	SMC_SELECT_BANK (2);
	SMC_outw (MC_ALLOC | numPages, MMU_CMD_REG);

	/* FIXME: the ALLOC_INT bit never gets set *
	 * so the following will always give a	   *
	 * memory allocation error.		   *
	 * same code works in armboot though	   *
	 * -ro
	 */

again:
	try++;
	time_out = MEMORY_WAIT_TIME;
	do {
		status = SMC_inb (SMC91111_INT_REG);
		if (status & IM_ALLOC_INT) {
			/* acknowledge the interrupt */
			SMC_outb (IM_ALLOC_INT, SMC91111_INT_REG);
			break;
		}
	} while (--time_out);

	if (!time_out) {
		PRINTK2 ("%s: memory allocation, try %d failed ...\n",
			 SMC_DEV_NAME, try);
		if (try < SMC_ALLOC_MAX_TRY)
			goto again;
		else
			return 0;
	}

	PRINTK2 ("%s: memory allocation, try %d succeeded ...\n",
		 SMC_DEV_NAME, try);

	/* I can send the packet now.. */

	ioaddr = SMC_BASE_ADDRESS;

	buf = (byte *) packet;

	/* If I get here, I _know_ there is a packet slot waiting for me */
	packet_no = SMC_inb (AR_REG);
	if (packet_no & AR_FAILED) {
		/* or isn't there?  BAD CHIP! */
		printf ("%s: Memory allocation failed. \n", SMC_DEV_NAME);
		return 0;
	}

	/* we have a packet address, so tell the card to use it */
#ifndef CONFIG_XAENIAX
	SMC_outb (packet_no, PN_REG);
#else
	/* On Xaeniax board, we can't use SMC_outb here because that way
	 * the Allocate MMU command will end up written to the command register
	 * as well, which will lead to a problem.
	 */
	SMC_outl (packet_no << 16, 0);
#endif
	/* do not write new ptr value if Write data fifo not empty */
	while ( saved_ptr & PTR_NOTEMPTY )
		printf ("Write data fifo not empty!\n");

	/* point to the beginning of the packet */
	SMC_outw (PTR_AUTOINC, PTR_REG);

	PRINTK3 ("%s: Trying to xmit packet of length %x\n",
		 SMC_DEV_NAME, length);

#if SMC_DEBUG > 2
	printf ("Transmitting Packet\n");
	print_packet (buf, length);
#endif

	/* send the packet length ( +6 for status, length and ctl byte )
	   and the status word ( set to zeros ) */
#ifdef USE_32_BIT
	SMC_outl ((length + 6) << 16, SMC91111_DATA_REG);
#else
	SMC_outw (0, SMC91111_DATA_REG);
	/* send the packet length ( +6 for status words, length, and ctl */
	SMC_outw ((length + 6), SMC91111_DATA_REG);
#endif

	/* send the actual data
	   . I _think_ it's faster to send the longs first, and then
	   . mop up by sending the last word.  It depends heavily
	   . on alignment, at least on the 486.	 Maybe it would be
	   . a good idea to check which is optimal?  But that could take
	   . almost as much time as is saved?
	 */
#ifdef USE_32_BIT
	SMC_outsl (SMC91111_DATA_REG, buf, length >> 2);
	if (length & 0x2)
		SMC_outw (*((word *) (buf + (length & 0xFFFFFFFC))),
			  SMC91111_DATA_REG);
#else
	SMC_outsw (SMC91111_DATA_REG, buf, (length) >> 1);
#endif /* USE_32_BIT */

	/* Send the last byte, if there is one.	  */
	if ((length & 1) == 0) {
		SMC_outw (0, SMC91111_DATA_REG);
	} else {
		SMC_outw (buf[length - 1] | 0x2000, SMC91111_DATA_REG);
	}

	/* and let the chipset deal with it */
	SMC_outw (MC_ENQUEUE, MMU_CMD_REG);

	/* poll for TX INT */
	/* if (poll4int (IM_TX_INT, SMC_TX_TIMEOUT)) { */
	/* poll for TX_EMPTY INT - autorelease enabled */
	if (poll4int(IM_TX_EMPTY_INT, SMC_TX_TIMEOUT)) {
		/* sending failed */
		PRINTK2 ("%s: TX timeout, sending failed...\n", SMC_DEV_NAME);

		/* release packet */
		/* no need to release, MMU does that now */
#ifdef CONFIG_XAENIAX
		 SMC_outw (MC_FREEPKT, MMU_CMD_REG);
#endif

		/* wait for MMU getting ready (low) */
		while (SMC_inw (MMU_CMD_REG) & MC_BUSY) {
			udelay (10);
		}

		PRINTK2 ("MMU ready\n");


		return 0;
	} else {
		/* ack. int */
		SMC_outb (IM_TX_EMPTY_INT, SMC91111_INT_REG);
		/* SMC_outb (IM_TX_INT, SMC91111_INT_REG); */
		PRINTK2 ("%s: Sent packet of length %d \n", SMC_DEV_NAME,
			 length);

		/* release packet */
		/* no need to release, MMU does that now */
#ifdef CONFIG_XAENIAX
		SMC_outw (MC_FREEPKT, MMU_CMD_REG);
#endif

		/* wait for MMU getting ready (low) */
		while (SMC_inw (MMU_CMD_REG) & MC_BUSY) {
			udelay (10);
		}

		PRINTK2 ("MMU ready\n");


	}

	/* restore previously saved registers */
#ifndef CONFIG_XAENIAX
	SMC_outb( saved_pnr, PN_REG );
#else
	/* On Xaeniax board, we can't use SMC_outb here because that way
	 * the Allocate MMU command will end up written to the command register
	 * as well, which will lead to a problem.
	 */
	SMC_outl(saved_pnr << 16, 0);
#endif
	SMC_outw( saved_ptr, PTR_REG );

	return length;
}

/*-------------------------------------------------------------------------
 |
 | smc_destructor( struct net_device * dev )
 |   Input parameters:
 |	dev, pointer to the device structure
 |
 |   Output:
 |	None.
 |
 ---------------------------------------------------------------------------
*/
void smc_destructor()
{
	PRINTK2(CARDNAME ": smc_destructor\n");
}


/*
 * Open and Initialize the board
 *
 * Set up everything, reset the card, etc ..
 *
 */
static int smc_open (bd_t * bd)
{
	int i, err;

	PRINTK2 ("%s: smc_open\n", SMC_DEV_NAME);

	/* reset the hardware */
	smc_reset ();
	smc_enable ();

	/* Configure the PHY */
#ifndef CONFIG_SMC91111_EXT_PHY
	smc_phy_configure ();
#endif

	/* conservative setting (10Mbps, HalfDuplex, no AutoNeg.) */
/*	SMC_SELECT_BANK(0); */
/*	SMC_outw(0, RPC_REG); */
	SMC_SELECT_BANK (1);

	err = smc_get_ethaddr (bd);	/* set smc_mac_addr, and sync it with u-boot globals */
	if (err < 0) {
		memset (bd->bi_enetaddr, 0, 6); /* hack to make error stick! upper code will abort if not set */
		return (-1);	/* upper code ignores this, but NOT bi_enetaddr */
	}
#ifdef USE_32_BIT
	for (i = 0; i < 6; i += 2) {
		word address;

		address = smc_mac_addr[i + 1] << 8;
		address |= smc_mac_addr[i];
		SMC_outw (address, (ADDR0_REG + i));
	}
#else
	for (i = 0; i < 6; i++)
		SMC_outb (smc_mac_addr[i], (ADDR0_REG + i));
#endif

	return 0;
}

/*-------------------------------------------------------------
 .
 . smc_rcv -  receive a packet from the card
 .
 . There is ( at least ) a packet waiting to be read from
 . chip-memory.
 .
 . o Read the status
 . o If an error, record it
 . o otherwise, read in the packet
 --------------------------------------------------------------
*/
static int smc_rcv()
{
	int	packet_number;
	word	status;
	word	packet_length;
	int	is_error = 0;
#ifdef USE_32_BIT
	dword stat_len;
#endif
	byte saved_pnr;
	word saved_ptr;

	SMC_SELECT_BANK(2);
	/* save PTR and PTR registers */
	saved_pnr = SMC_inb( PN_REG );
	saved_ptr = SMC_inw( PTR_REG );

	packet_number = SMC_inw( RXFIFO_REG );

	if ( packet_number & RXFIFO_REMPTY ) {

		return 0;
	}

	PRINTK3("%s: smc_rcv\n", SMC_DEV_NAME);
	/*  start reading from the start of the packet */
	SMC_outw( PTR_READ | PTR_RCV | PTR_AUTOINC, PTR_REG );

	/* First two words are status and packet_length */
#ifdef USE_32_BIT
	stat_len = SMC_inl(SMC91111_DATA_REG);
	status = stat_len & 0xffff;
	packet_length = stat_len >> 16;
#else
	status		= SMC_inw( SMC91111_DATA_REG );
	packet_length	= SMC_inw( SMC91111_DATA_REG );
#endif

	packet_length &= 0x07ff;  /* mask off top bits */

	PRINTK2("RCV: STATUS %4x LENGTH %4x\n", status, packet_length );

	if ( !(status & RS_ERRORS ) ){
		/* Adjust for having already read the first two words */
		packet_length -= 4; /*4; */


		/* set odd length for bug in LAN91C111, */
		/* which never sets RS_ODDFRAME */
		/* TODO ? */


#ifdef USE_32_BIT
		PRINTK3(" Reading %d dwords (and %d bytes) \n",
			packet_length >> 2, packet_length & 3 );
		/* QUESTION:  Like in the TX routine, do I want
		   to send the DWORDs or the bytes first, or some
		   mixture.  A mixture might improve already slow PIO
		   performance	*/
		SMC_insl( SMC91111_DATA_REG , NetRxPackets[0], packet_length >> 2 );
		/* read the left over bytes */
		if (packet_length & 3) {
			int i;

			byte *tail = (byte *)(NetRxPackets[0] + (packet_length & ~3));
			dword leftover = SMC_inl(SMC91111_DATA_REG);
			for (i=0; i<(packet_length & 3); i++)
				*tail++ = (byte) (leftover >> (8*i)) & 0xff;
		}
#else
		PRINTK3(" Reading %d words and %d byte(s) \n",
			(packet_length >> 1 ), packet_length & 1 );
		SMC_insw(SMC91111_DATA_REG , NetRxPackets[0], packet_length >> 1);

#endif /* USE_32_BIT */

#if	SMC_DEBUG > 2
		printf("Receiving Packet\n");
		print_packet( NetRxPackets[0], packet_length );
#endif
	} else {
		/* error ... */
		/* TODO ? */
		is_error = 1;
	}

	while ( SMC_inw( MMU_CMD_REG ) & MC_BUSY )
		udelay(1); /* Wait until not busy */

	/*  error or good, tell the card to get rid of this packet */
	SMC_outw( MC_RELEASE, MMU_CMD_REG );

	while ( SMC_inw( MMU_CMD_REG ) & MC_BUSY )
		udelay(1); /* Wait until not busy */

	/* restore saved registers */
#ifndef CONFIG_XAENIAX
	SMC_outb( saved_pnr, PN_REG );
#else
	/* On Xaeniax board, we can't use SMC_outb here because that way
	 * the Allocate MMU command will end up written to the command register
	 * as well, which will lead to a problem.
	 */
	SMC_outl( saved_pnr << 16, 0);
#endif
	SMC_outw( saved_ptr, PTR_REG );

	if (!is_error) {
		/* Pass the packet up to the protocol layers. */
		NetReceive(NetRxPackets[0], packet_length);
		return packet_length;
	} else {
		return 0;
	}

}


/*----------------------------------------------------
 . smc_close
 .
 . this makes the board clean up everything that it can
 . and not talk to the outside world.	Caused by
 . an 'ifconfig ethX down'
 .
 -----------------------------------------------------*/
static int smc_close()
{
	PRINTK2("%s: smc_close\n", SMC_DEV_NAME);

	/* clear everything */
	smc_shutdown();

	return 0;
}


#if 0
/*------------------------------------------------------------
 . Modify a bit in the LAN91C111 register set
 .-------------------------------------------------------------*/
static word smc_modify_regbit(int bank, int ioaddr, int reg,
	unsigned int bit, int val)
{
	word regval;

	SMC_SELECT_BANK( bank );

	regval = SMC_inw( reg );
	if (val)
		regval |= bit;
	else
		regval &= ~bit;

	SMC_outw( regval, 0 );
	return(regval);
}


/*------------------------------------------------------------
 . Retrieve a bit in the LAN91C111 register set
 .-------------------------------------------------------------*/
static int smc_get_regbit(int bank, int ioaddr, int reg, unsigned int bit)
{
	SMC_SELECT_BANK( bank );
	if ( SMC_inw( reg ) & bit)
		return(1);
	else
		return(0);
}


/*------------------------------------------------------------
 . Modify a LAN91C111 register (word access only)
 .-------------------------------------------------------------*/
static void smc_modify_reg(int bank, int ioaddr, int reg, word val)
{
	SMC_SELECT_BANK( bank );
	SMC_outw( val, reg );
}


/*------------------------------------------------------------
 . Retrieve a LAN91C111 register (word access only)
 .-------------------------------------------------------------*/
static int smc_get_reg(int bank, int ioaddr, int reg)
{
	SMC_SELECT_BANK( bank );
	return(SMC_inw( reg ));
}

#endif /* 0 */

/*---PHY CONTROL AND CONFIGURATION----------------------------------------- */

#if (SMC_DEBUG > 2 )

/*------------------------------------------------------------
 . Debugging function for viewing MII Management serial bitstream
 .-------------------------------------------------------------*/
static void smc_dump_mii_stream (byte * bits, int size)
{
	int i;

	printf ("BIT#:");
	for (i = 0; i < size; ++i) {
		printf ("%d", i % 10);
	}

	printf ("\nMDOE:");
	for (i = 0; i < size; ++i) {
		if (bits[i] & MII_MDOE)
			printf ("1");
		else
			printf ("0");
	}

	printf ("\nMDO :");
	for (i = 0; i < size; ++i) {
		if (bits[i] & MII_MDO)
			printf ("1");
		else
			printf ("0");
	}

	printf ("\nMDI :");
	for (i = 0; i < size; ++i) {
		if (bits[i] & MII_MDI)
			printf ("1");
		else
			printf ("0");
	}

	printf ("\n");
}
#endif

/*------------------------------------------------------------
 . Reads a register from the MII Management serial interface
 .-------------------------------------------------------------*/
#ifndef CONFIG_SMC91111_EXT_PHY
static word smc_read_phy_register (byte phyreg)
{
	int oldBank;
	int i;
	byte mask;
	word mii_reg;
	byte bits[64];
	int clk_idx = 0;
	int input_idx;
	word phydata;
	byte phyaddr = SMC_PHY_ADDR;

	/* 32 consecutive ones on MDO to establish sync */
	for (i = 0; i < 32; ++i)
		bits[clk_idx++] = MII_MDOE | MII_MDO;

	/* Start code <01> */
	bits[clk_idx++] = MII_MDOE;
	bits[clk_idx++] = MII_MDOE | MII_MDO;

	/* Read command <10> */
	bits[clk_idx++] = MII_MDOE | MII_MDO;
	bits[clk_idx++] = MII_MDOE;

	/* Output the PHY address, msb first */
	mask = (byte) 0x10;
	for (i = 0; i < 5; ++i) {
		if (phyaddr & mask)
			bits[clk_idx++] = MII_MDOE | MII_MDO;
		else
			bits[clk_idx++] = MII_MDOE;

		/* Shift to next lowest bit */
		mask >>= 1;
	}

	/* Output the phy register number, msb first */
	mask = (byte) 0x10;
	for (i = 0; i < 5; ++i) {
		if (phyreg & mask)
			bits[clk_idx++] = MII_MDOE | MII_MDO;
		else
			bits[clk_idx++] = MII_MDOE;

		/* Shift to next lowest bit */
		mask >>= 1;
	}

	/* Tristate and turnaround (2 bit times) */
	bits[clk_idx++] = 0;
	/*bits[clk_idx++] = 0; */

	/* Input starts at this bit time */
	input_idx = clk_idx;

	/* Will input 16 bits */
	for (i = 0; i < 16; ++i)
		bits[clk_idx++] = 0;

	/* Final clock bit */
	bits[clk_idx++] = 0;

	/* Save the current bank */
	oldBank = SMC_inw (BANK_SELECT);

	/* Select bank 3 */
	SMC_SELECT_BANK (3);

	/* Get the current MII register value */
	mii_reg = SMC_inw (MII_REG);

	/* Turn off all MII Interface bits */
	mii_reg &= ~(MII_MDOE | MII_MCLK | MII_MDI | MII_MDO);

	/* Clock all 64 cycles */
	for (i = 0; i < sizeof bits; ++i) {
		/* Clock Low - output data */
		SMC_outw (mii_reg | bits[i], MII_REG);
		udelay (SMC_PHY_CLOCK_DELAY);


		/* Clock Hi - input data */
		SMC_outw (mii_reg | bits[i] | MII_MCLK, MII_REG);
		udelay (SMC_PHY_CLOCK_DELAY);
		bits[i] |= SMC_inw (MII_REG) & MII_MDI;
	}

	/* Return to idle state */
	/* Set clock to low, data to low, and output tristated */
	SMC_outw (mii_reg, MII_REG);
	udelay (SMC_PHY_CLOCK_DELAY);

	/* Restore original bank select */
	SMC_SELECT_BANK (oldBank);

	/* Recover input data */
	phydata = 0;
	for (i = 0; i < 16; ++i) {
		phydata <<= 1;

		if (bits[input_idx++] & MII_MDI)
			phydata |= 0x0001;
	}

#if (SMC_DEBUG > 2 )
	printf ("smc_read_phy_register(): phyaddr=%x,phyreg=%x,phydata=%x\n",
		phyaddr, phyreg, phydata);
	smc_dump_mii_stream (bits, sizeof bits);
#endif

	return (phydata);
}


/*------------------------------------------------------------
 . Writes a register to the MII Management serial interface
 .-------------------------------------------------------------*/
static void smc_write_phy_register (byte phyreg, word phydata)
{
	int oldBank;
	int i;
	word mask;
	word mii_reg;
	byte bits[65];
	int clk_idx = 0;
	byte phyaddr = SMC_PHY_ADDR;

	/* 32 consecutive ones on MDO to establish sync */
	for (i = 0; i < 32; ++i)
		bits[clk_idx++] = MII_MDOE | MII_MDO;

	/* Start code <01> */
	bits[clk_idx++] = MII_MDOE;
	bits[clk_idx++] = MII_MDOE | MII_MDO;

	/* Write command <01> */
	bits[clk_idx++] = MII_MDOE;
	bits[clk_idx++] = MII_MDOE | MII_MDO;

	/* Output the PHY address, msb first */
	mask = (byte) 0x10;
	for (i = 0; i < 5; ++i) {
		if (phyaddr & mask)
			bits[clk_idx++] = MII_MDOE | MII_MDO;
		else
			bits[clk_idx++] = MII_MDOE;

		/* Shift to next lowest bit */
		mask >>= 1;
	}

	/* Output the phy register number, msb first */
	mask = (byte) 0x10;
	for (i = 0; i < 5; ++i) {
		if (phyreg & mask)
			bits[clk_idx++] = MII_MDOE | MII_MDO;
		else
			bits[clk_idx++] = MII_MDOE;

		/* Shift to next lowest bit */
		mask >>= 1;
	}

	/* Tristate and turnaround (2 bit times) */
	bits[clk_idx++] = 0;
	bits[clk_idx++] = 0;

	/* Write out 16 bits of data, msb first */
	mask = 0x8000;
	for (i = 0; i < 16; ++i) {
		if (phydata & mask)
			bits[clk_idx++] = MII_MDOE | MII_MDO;
		else
			bits[clk_idx++] = MII_MDOE;

		/* Shift to next lowest bit */
		mask >>= 1;
	}

	/* Final clock bit (tristate) */
	bits[clk_idx++] = 0;

	/* Save the current bank */
	oldBank = SMC_inw (BANK_SELECT);

	/* Select bank 3 */
	SMC_SELECT_BANK (3);

	/* Get the current MII register value */
	mii_reg = SMC_inw (MII_REG);

	/* Turn off all MII Interface bits */
	mii_reg &= ~(MII_MDOE | MII_MCLK | MII_MDI | MII_MDO);

	/* Clock all cycles */
	for (i = 0; i < sizeof bits; ++i) {
		/* Clock Low - output data */
		SMC_outw (mii_reg | bits[i], MII_REG);
		udelay (SMC_PHY_CLOCK_DELAY);


		/* Clock Hi - input data */
		SMC_outw (mii_reg | bits[i] | MII_MCLK, MII_REG);
		udelay (SMC_PHY_CLOCK_DELAY);
		bits[i] |= SMC_inw (MII_REG) & MII_MDI;
	}

	/* Return to idle state */
	/* Set clock to low, data to low, and output tristated */
	SMC_outw (mii_reg, MII_REG);
	udelay (SMC_PHY_CLOCK_DELAY);

	/* Restore original bank select */
	SMC_SELECT_BANK (oldBank);

#if (SMC_DEBUG > 2 )
	printf ("smc_write_phy_register(): phyaddr=%x,phyreg=%x,phydata=%x\n",
		phyaddr, phyreg, phydata);
	smc_dump_mii_stream (bits, sizeof bits);
#endif
}
#endif /* !CONFIG_SMC91111_EXT_PHY */


/*------------------------------------------------------------
 . Waits the specified number of milliseconds - kernel friendly
 .-------------------------------------------------------------*/
#ifndef CONFIG_SMC91111_EXT_PHY
static void smc_wait_ms(unsigned int ms)
{
	udelay(ms*1000);
}
#endif /* !CONFIG_SMC91111_EXT_PHY */


/*------------------------------------------------------------
 . Configures the specified PHY using Autonegotiation. Calls
 . smc_phy_fixed() if the user has requested a certain config.
 .-------------------------------------------------------------*/
#ifndef CONFIG_SMC91111_EXT_PHY
static void smc_phy_configure ()
{
	int timeout;
	byte phyaddr;
	word my_phy_caps;	/* My PHY capabilities */
	word my_ad_caps;	/* My Advertised capabilities */
	word status = 0;	/*;my status = 0 */
	int failed = 0;

	PRINTK3 ("%s: smc_program_phy()\n", SMC_DEV_NAME);


	/* Get the detected phy address */
	phyaddr = SMC_PHY_ADDR;

	/* Reset the PHY, setting all other bits to zero */
	smc_write_phy_register (PHY_CNTL_REG, PHY_CNTL_RST);

	/* Wait for the reset to complete, or time out */
	timeout = 6;		/* Wait up to 3 seconds */
	while (timeout--) {
		if (!(smc_read_phy_register (PHY_CNTL_REG)
		      & PHY_CNTL_RST)) {
			/* reset complete */
			break;
		}

		smc_wait_ms (500);	/* wait 500 millisecs */
	}

	if (timeout < 1) {
		printf ("%s:PHY reset timed out\n", SMC_DEV_NAME);
		goto smc_phy_configure_exit;
	}

	/* Read PHY Register 18, Status Output */
	/* lp->lastPhy18 = smc_read_phy_register(PHY_INT_REG); */

	/* Enable PHY Interrupts (for register 18) */
	/* Interrupts listed here are disabled */
	smc_write_phy_register (PHY_MASK_REG, 0xffff);

	/* Configure the Receive/Phy Control register */
	SMC_SELECT_BANK (0);
	SMC_outw (RPC_DEFAULT, RPC_REG);

	/* Copy our capabilities from PHY_STAT_REG to PHY_AD_REG */
	my_phy_caps = smc_read_phy_register (PHY_STAT_REG);
	my_ad_caps = PHY_AD_CSMA;	/* I am CSMA capable */

	if (my_phy_caps & PHY_STAT_CAP_T4)
		my_ad_caps |= PHY_AD_T4;

	if (my_phy_caps & PHY_STAT_CAP_TXF)
		my_ad_caps |= PHY_AD_TX_FDX;

	if (my_phy_caps & PHY_STAT_CAP_TXH)
		my_ad_caps |= PHY_AD_TX_HDX;

	if (my_phy_caps & PHY_STAT_CAP_TF)
		my_ad_caps |= PHY_AD_10_FDX;

	if (my_phy_caps & PHY_STAT_CAP_TH)
		my_ad_caps |= PHY_AD_10_HDX;

	/* Update our Auto-Neg Advertisement Register */
	smc_write_phy_register (PHY_AD_REG, my_ad_caps);

	/* Read the register back.  Without this, it appears that when */
	/* auto-negotiation is restarted, sometimes it isn't ready and */
	/* the link does not come up. */
	smc_read_phy_register(PHY_AD_REG);

	PRINTK2 ("%s: phy caps=%x\n", SMC_DEV_NAME, my_phy_caps);
	PRINTK2 ("%s: phy advertised caps=%x\n", SMC_DEV_NAME, my_ad_caps);

	/* Restart auto-negotiation process in order to advertise my caps */
	smc_write_phy_register (PHY_CNTL_REG,
				PHY_CNTL_ANEG_EN | PHY_CNTL_ANEG_RST);

	/* Wait for the auto-negotiation to complete.  This may take from */
	/* 2 to 3 seconds. */
	/* Wait for the reset to complete, or time out */
	timeout = CONFIG_SMC_AUTONEG_TIMEOUT * 2;
	while (timeout--) {

		status = smc_read_phy_register (PHY_STAT_REG);
		if (status & PHY_STAT_ANEG_ACK) {
			/* auto-negotiate complete */
			break;
		}

		smc_wait_ms (500);	/* wait 500 millisecs */

		/* Restart auto-negotiation if remote fault */
		if (status & PHY_STAT_REM_FLT) {
			printf ("%s: PHY remote fault detected\n",
				SMC_DEV_NAME);

			/* Restart auto-negotiation */
			printf ("%s: PHY restarting auto-negotiation\n",
				SMC_DEV_NAME);
			smc_write_phy_register (PHY_CNTL_REG,
						PHY_CNTL_ANEG_EN |
						PHY_CNTL_ANEG_RST |
						PHY_CNTL_SPEED |
						PHY_CNTL_DPLX);
		}
	}

	if (timeout < 1) {
		printf ("%s: PHY auto-negotiate timed out\n", SMC_DEV_NAME);
		failed = 1;
	}

	/* Fail if we detected an auto-negotiate remote fault */
	if (status & PHY_STAT_REM_FLT) {
		printf ("%s: PHY remote fault detected\n", SMC_DEV_NAME);
		failed = 1;
	}

	/* Re-Configure the Receive/Phy Control register */
	SMC_outw (RPC_DEFAULT, RPC_REG);

smc_phy_configure_exit:	;

}
#endif /* !CONFIG_SMC91111_EXT_PHY */


#if SMC_DEBUG > 2
static void print_packet( byte * buf, int length )
{
	int i;
	int remainder;
	int lines;

	printf("Packet of length %d \n", length );

#if SMC_DEBUG > 3
	lines = length / 16;
	remainder = length % 16;

	for ( i = 0; i < lines ; i ++ ) {
		int cur;

		for ( cur = 0; cur < 8; cur ++ ) {
			byte a, b;

			a = *(buf ++ );
			b = *(buf ++ );
			printf("%02x%02x ", a, b );
		}
		printf("\n");
	}
	for ( i = 0; i < remainder/2 ; i++ ) {
		byte a, b;

		a = *(buf ++ );
		b = *(buf ++ );
		printf("%02x%02x ", a, b );
	}
	printf("\n");
#endif
}
#endif

int eth_init(bd_t *bd) {
	return (smc_open(bd));
}

void eth_halt() {
	smc_close();
}

int eth_rx() {
	return smc_rcv();
}

int eth_send(volatile void *packet, int length) {
	return smc_send_packet(packet, length);
}

int smc_get_ethaddr (bd_t * bd)
{
	int env_size, rom_valid, env_present = 0, reg;
	char *s = NULL, *e, *v_mac, es[] = "11:22:33:44:55:66";
	uchar s_env_mac[64], v_env_mac[6], v_rom_mac[6];

	env_size = getenv_r ("ethaddr", s_env_mac, sizeof (s_env_mac));
	if ((env_size > 0) && (env_size < sizeof (es))) {	/* exit if env is bad */
		printf ("\n*** ERROR: ethaddr is not set properly!!\n");
		return (-1);
	}

	if (env_size > 0) {
		env_present = 1;
		s = s_env_mac;
	}

	for (reg = 0; reg < 6; ++reg) { /* turn string into mac value */
		v_env_mac[reg] = s ? simple_strtoul (s, &e, 16) : 0;
		if (s)
			s = (*e) ? e + 1 : e;
	}

	rom_valid = get_rom_mac (v_rom_mac);	/* get ROM mac value if any */

	if (!env_present) {	/* if NO env */
		if (rom_valid) {	/* but ROM is valid */
			v_mac = v_rom_mac;
			sprintf (s_env_mac, "%02X:%02X:%02X:%02X:%02X:%02X",
				 v_mac[0], v_mac[1], v_mac[2], v_mac[3],
				 v_mac[4], v_mac[5]);
			setenv ("ethaddr", s_env_mac);
		} else {	/* no env, bad ROM */
			printf ("\n*** ERROR: ethaddr is NOT set !!\n");
			return (-1);
		}
	} else {		/* good env, don't care ROM */
		v_mac = v_env_mac;	/* always use a good env over a ROM */
	}

	if (env_present && rom_valid) { /* if both env and ROM are good */
		if (memcmp (v_env_mac, v_rom_mac, 6) != 0) {
			printf ("\nWarning: MAC addresses don't match:\n");
			printf ("\tHW MAC address:  "
				"%02X:%02X:%02X:%02X:%02X:%02X\n",
				v_rom_mac[0], v_rom_mac[1],
				v_rom_mac[2], v_rom_mac[3],
				v_rom_mac[4], v_rom_mac[5] );
			printf ("\t\"ethaddr\" value: "
				"%02X:%02X:%02X:%02X:%02X:%02X\n",
				v_env_mac[0], v_env_mac[1],
				v_env_mac[2], v_env_mac[3],
				v_env_mac[4], v_env_mac[5]) ;
			debug ("### Set MAC addr from environment\n");
		}
	}
	memcpy (bd->bi_enetaddr, v_mac, 6);	/* update global address to match env (allows env changing) */
	smc_set_mac_addr (v_mac);	/* use old function to update smc default */
	PRINTK("Using MAC Address %02X:%02X:%02X:%02X:%02X:%02X\n", v_mac[0], v_mac[1],
		v_mac[2], v_mac[3], v_mac[4], v_mac[5]);
	return (0);
}

int get_rom_mac (char *v_rom_mac)
{
#ifdef HARDCODE_MAC	/* used for testing or to supress run time warnings */
	char hw_mac_addr[] = { 0x02, 0x80, 0xad, 0x20, 0x31, 0xb8 };

	memcpy (v_rom_mac, hw_mac_addr, 6);
	return (1);
#else
	int i;
	int valid_mac = 0;

	SMC_SELECT_BANK (1);
	for (i=0; i<6; i++)
	{
		v_rom_mac[i] = SMC_inb ((ADDR0_REG + i));
		valid_mac |= v_rom_mac[i];
	}

	return (valid_mac ? 1 : 0);
#endif
}
#endif /* CONFIG_DRIVER_SMC91111 */