summaryrefslogtreecommitdiff
path: root/drivers/net/irda/via-ircc.c
blob: 998bb89ede71c75ea1d67d4c07cbc77963d79c72 (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
/********************************************************************
 Filename:      via-ircc.c
 Version:       1.0 
 Description:   Driver for the VIA VT8231/VT8233 IrDA chipsets
 Author:        VIA Technologies,inc
 Date  :	08/06/2003

Copyright (c) 1998-2003 VIA Technologies, Inc.

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, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTIES OR REPRESENTATIONS; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with
this program; if not, see <http://www.gnu.org/licenses/>.

F01 Oct/02/02: Modify code for V0.11(move out back to back transfer)
F02 Oct/28/02: Add SB device ID for 3147 and 3177.
 Comment :
       jul/09/2002 : only implement two kind of dongle currently.
       Oct/02/2002 : work on VT8231 and VT8233 .
       Aug/06/2003 : change driver format to pci driver .

2004-02-16: <sda@bdit.de>
- Removed unneeded 'legacy' pci stuff.
- Make sure SIR mode is set (hw_init()) before calling mode-dependent stuff.
- On speed change from core, don't send SIR frame with new speed. 
  Use current speed and change speeds later.
- Make module-param dongle_id actually work.
- New dongle_id 17 (0x11): TDFS4500. Single-ended SIR only. 
  Tested with home-grown PCB on EPIA boards.
- Code cleanup.
       
 ********************************************************************/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <linux/ioport.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/rtnetlink.h>
#include <linux/pci.h>
#include <linux/dma-mapping.h>
#include <linux/gfp.h>

#include <asm/io.h>
#include <asm/dma.h>
#include <asm/byteorder.h>

#include <linux/pm.h>

#include <net/irda/wrapper.h>
#include <net/irda/irda.h>
#include <net/irda/irda_device.h>

#include "via-ircc.h"

#define VIA_MODULE_NAME "via-ircc"
#define CHIP_IO_EXTENT 0x40

static char *driver_name = VIA_MODULE_NAME;

/* Module parameters */
static int qos_mtt_bits = 0x07;	/* 1 ms or more */
static int dongle_id = 0;	/* default: probe */

/* We can't guess the type of connected dongle, user *must* supply it. */
module_param(dongle_id, int, 0);

/* Some prototypes */
static int via_ircc_open(struct pci_dev *pdev, chipio_t *info,
			 unsigned int id);
static int via_ircc_dma_receive(struct via_ircc_cb *self);
static int via_ircc_dma_receive_complete(struct via_ircc_cb *self,
					 int iobase);
static netdev_tx_t via_ircc_hard_xmit_sir(struct sk_buff *skb,
						struct net_device *dev);
static netdev_tx_t via_ircc_hard_xmit_fir(struct sk_buff *skb,
						struct net_device *dev);
static void via_hw_init(struct via_ircc_cb *self);
static void via_ircc_change_speed(struct via_ircc_cb *self, __u32 baud);
static irqreturn_t via_ircc_interrupt(int irq, void *dev_id);
static int via_ircc_is_receiving(struct via_ircc_cb *self);
static int via_ircc_read_dongle_id(int iobase);

static int via_ircc_net_open(struct net_device *dev);
static int via_ircc_net_close(struct net_device *dev);
static int via_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq,
			      int cmd);
static void via_ircc_change_dongle_speed(int iobase, int speed,
					 int dongle_id);
static int RxTimerHandler(struct via_ircc_cb *self, int iobase);
static void hwreset(struct via_ircc_cb *self);
static int via_ircc_dma_xmit(struct via_ircc_cb *self, u16 iobase);
static int upload_rxdata(struct via_ircc_cb *self, int iobase);
static int via_init_one(struct pci_dev *pcidev, const struct pci_device_id *id);
static void via_remove_one(struct pci_dev *pdev);

/* FIXME : Should use udelay() instead, even if we are x86 only - Jean II */
static void iodelay(int udelay)
{
	u8 data;
	int i;

	for (i = 0; i < udelay; i++) {
		data = inb(0x80);
	}
}

static DEFINE_PCI_DEVICE_TABLE(via_pci_tbl) = {
	{ PCI_VENDOR_ID_VIA, 0x8231, PCI_ANY_ID, PCI_ANY_ID,0,0,0 },
	{ PCI_VENDOR_ID_VIA, 0x3109, PCI_ANY_ID, PCI_ANY_ID,0,0,1 },
	{ PCI_VENDOR_ID_VIA, 0x3074, PCI_ANY_ID, PCI_ANY_ID,0,0,2 },
	{ PCI_VENDOR_ID_VIA, 0x3147, PCI_ANY_ID, PCI_ANY_ID,0,0,3 },
	{ PCI_VENDOR_ID_VIA, 0x3177, PCI_ANY_ID, PCI_ANY_ID,0,0,4 },
	{ 0, }
};

MODULE_DEVICE_TABLE(pci,via_pci_tbl);


static struct pci_driver via_driver = {
	.name		= VIA_MODULE_NAME,
	.id_table	= via_pci_tbl,
	.probe		= via_init_one,
	.remove		= via_remove_one,
};


/*
 * Function via_ircc_init ()
 *
 *    Initialize chip. Just find out chip type and resource.
 */
static int __init via_ircc_init(void)
{
	int rc;

	IRDA_DEBUG(3, "%s()\n", __func__);

	rc = pci_register_driver(&via_driver);
	if (rc < 0) {
		IRDA_DEBUG(0, "%s(): error rc = %d, returning  -ENODEV...\n",
			   __func__, rc);
		return -ENODEV;
	}
	return 0;
}

static int via_init_one(struct pci_dev *pcidev, const struct pci_device_id *id)
{
	int rc;
        u8 temp,oldPCI_40,oldPCI_44,bTmp,bTmp1;
	u16 Chipset,FirDRQ1,FirDRQ0,FirIRQ,FirIOBase;
	chipio_t info;

	IRDA_DEBUG(2, "%s(): Device ID=(0X%X)\n", __func__, id->device);

	rc = pci_enable_device (pcidev);
	if (rc) {
		IRDA_DEBUG(0, "%s(): error rc = %d\n", __func__, rc);
		return -ENODEV;
	}

	// South Bridge exist
        if ( ReadLPCReg(0x20) != 0x3C )
		Chipset=0x3096;
	else
		Chipset=0x3076;

	if (Chipset==0x3076) {
		IRDA_DEBUG(2, "%s(): Chipset = 3076\n", __func__);

		WriteLPCReg(7,0x0c );
		temp=ReadLPCReg(0x30);//check if BIOS Enable Fir
		if((temp&0x01)==1) {   // BIOS close or no FIR
			WriteLPCReg(0x1d, 0x82 );
			WriteLPCReg(0x23,0x18);
			temp=ReadLPCReg(0xF0);
			if((temp&0x01)==0) {
				temp=(ReadLPCReg(0x74)&0x03);    //DMA
				FirDRQ0=temp + 4;
				temp=(ReadLPCReg(0x74)&0x0C) >> 2;
				FirDRQ1=temp + 4;
			} else {
				temp=(ReadLPCReg(0x74)&0x0C) >> 2;    //DMA
				FirDRQ0=temp + 4;
				FirDRQ1=FirDRQ0;
			}
			FirIRQ=(ReadLPCReg(0x70)&0x0f);		//IRQ
			FirIOBase=ReadLPCReg(0x60 ) << 8;	//IO Space :high byte
			FirIOBase=FirIOBase| ReadLPCReg(0x61) ;	//low byte
			FirIOBase=FirIOBase  ;
			info.fir_base=FirIOBase;
			info.irq=FirIRQ;
			info.dma=FirDRQ1;
			info.dma2=FirDRQ0;
			pci_read_config_byte(pcidev,0x40,&bTmp);
			pci_write_config_byte(pcidev,0x40,((bTmp | 0x08) & 0xfe));
			pci_read_config_byte(pcidev,0x42,&bTmp);
			pci_write_config_byte(pcidev,0x42,(bTmp | 0xf0));
			pci_write_config_byte(pcidev,0x5a,0xc0);
			WriteLPCReg(0x28, 0x70 );
			rc = via_ircc_open(pcidev, &info, 0x3076);
		} else
			rc = -ENODEV; //IR not turn on	 
	} else { //Not VT1211
		IRDA_DEBUG(2, "%s(): Chipset = 3096\n", __func__);

		pci_read_config_byte(pcidev,0x67,&bTmp);//check if BIOS Enable Fir
		if((bTmp&0x01)==1) {  // BIOS enable FIR
			//Enable Double DMA clock
			pci_read_config_byte(pcidev,0x42,&oldPCI_40);
			pci_write_config_byte(pcidev,0x42,oldPCI_40 | 0x80);
			pci_read_config_byte(pcidev,0x40,&oldPCI_40);
			pci_write_config_byte(pcidev,0x40,oldPCI_40 & 0xf7);
			pci_read_config_byte(pcidev,0x44,&oldPCI_44);
			pci_write_config_byte(pcidev,0x44,0x4e);
  //---------- read configuration from Function0 of south bridge
			if((bTmp&0x02)==0) {
				pci_read_config_byte(pcidev,0x44,&bTmp1); //DMA
				FirDRQ0 = (bTmp1 & 0x30) >> 4;
				pci_read_config_byte(pcidev,0x44,&bTmp1);
				FirDRQ1 = (bTmp1 & 0xc0) >> 6;
			} else  {
				pci_read_config_byte(pcidev,0x44,&bTmp1);    //DMA
				FirDRQ0 = (bTmp1 & 0x30) >> 4 ;
				FirDRQ1=0;
			}
			pci_read_config_byte(pcidev,0x47,&bTmp1);  //IRQ
			FirIRQ = bTmp1 & 0x0f;

			pci_read_config_byte(pcidev,0x69,&bTmp);
			FirIOBase = bTmp << 8;//hight byte
			pci_read_config_byte(pcidev,0x68,&bTmp);
			FirIOBase = (FirIOBase | bTmp ) & 0xfff0;
  //-------------------------
			info.fir_base=FirIOBase;
			info.irq=FirIRQ;
			info.dma=FirDRQ1;
			info.dma2=FirDRQ0;
			rc = via_ircc_open(pcidev, &info, 0x3096);
		} else
			rc = -ENODEV; //IR not turn on !!!!!
	}//Not VT1211

	IRDA_DEBUG(2, "%s(): End - rc = %d\n", __func__, rc);
	return rc;
}

static void __exit via_ircc_cleanup(void)
{
	IRDA_DEBUG(3, "%s()\n", __func__);

	/* Cleanup all instances of the driver */
	pci_unregister_driver (&via_driver); 
}

static const struct net_device_ops via_ircc_sir_ops = {
	.ndo_start_xmit = via_ircc_hard_xmit_sir,
	.ndo_open = via_ircc_net_open,
	.ndo_stop = via_ircc_net_close,
	.ndo_do_ioctl = via_ircc_net_ioctl,
};
static const struct net_device_ops via_ircc_fir_ops = {
	.ndo_start_xmit = via_ircc_hard_xmit_fir,
	.ndo_open = via_ircc_net_open,
	.ndo_stop = via_ircc_net_close,
	.ndo_do_ioctl = via_ircc_net_ioctl,
};

/*
 * Function via_ircc_open(pdev, iobase, irq)
 *
 *    Open driver instance
 *
 */
static int via_ircc_open(struct pci_dev *pdev, chipio_t *info, unsigned int id)
{
	struct net_device *dev;
	struct via_ircc_cb *self;
	int err;

	IRDA_DEBUG(3, "%s()\n", __func__);

	/* Allocate new instance of the driver */
	dev = alloc_irdadev(sizeof(struct via_ircc_cb));
	if (dev == NULL) 
		return -ENOMEM;

	self = netdev_priv(dev);
	self->netdev = dev;
	spin_lock_init(&self->lock);

	pci_set_drvdata(pdev, self);

	/* Initialize Resource */
	self->io.cfg_base = info->cfg_base;
	self->io.fir_base = info->fir_base;
	self->io.irq = info->irq;
	self->io.fir_ext = CHIP_IO_EXTENT;
	self->io.dma = info->dma;
	self->io.dma2 = info->dma2;
	self->io.fifo_size = 32;
	self->chip_id = id;
	self->st_fifo.len = 0;
	self->RxDataReady = 0;

	/* Reserve the ioports that we need */
	if (!request_region(self->io.fir_base, self->io.fir_ext, driver_name)) {
		IRDA_DEBUG(0, "%s(), can't get iobase of 0x%03x\n",
			   __func__, self->io.fir_base);
		err = -ENODEV;
		goto err_out1;
	}
	
	/* Initialize QoS for this device */
	irda_init_max_qos_capabilies(&self->qos);

	/* Check if user has supplied the dongle id or not */
	if (!dongle_id)
		dongle_id = via_ircc_read_dongle_id(self->io.fir_base);
	self->io.dongle_id = dongle_id;

	/* The only value we must override it the baudrate */
	/* Maximum speeds and capabilities are dongle-dependent. */
	switch( self->io.dongle_id ){
	case 0x0d:
		self->qos.baud_rate.bits =
		    IR_9600 | IR_19200 | IR_38400 | IR_57600 | IR_115200 |
		    IR_576000 | IR_1152000 | (IR_4000000 << 8);
		break;
	default:
		self->qos.baud_rate.bits =
		    IR_9600 | IR_19200 | IR_38400 | IR_57600 | IR_115200;
		break;
	}

	/* Following was used for testing:
	 *
	 *   self->qos.baud_rate.bits = IR_9600;
	 *
	 * Is is no good, as it prohibits (error-prone) speed-changes.
	 */

	self->qos.min_turn_time.bits = qos_mtt_bits;
	irda_qos_bits_to_value(&self->qos);

	/* Max DMA buffer size needed = (data_size + 6) * (window_size) + 6; */
	self->rx_buff.truesize = 14384 + 2048;
	self->tx_buff.truesize = 14384 + 2048;

	/* Allocate memory if needed */
	self->rx_buff.head =
		dma_zalloc_coherent(&pdev->dev, self->rx_buff.truesize,
				    &self->rx_buff_dma, GFP_KERNEL);
	if (self->rx_buff.head == NULL) {
		err = -ENOMEM;
		goto err_out2;
	}

	self->tx_buff.head =
		dma_zalloc_coherent(&pdev->dev, self->tx_buff.truesize,
				    &self->tx_buff_dma, GFP_KERNEL);
	if (self->tx_buff.head == NULL) {
		err = -ENOMEM;
		goto err_out3;
	}

	self->rx_buff.in_frame = FALSE;
	self->rx_buff.state = OUTSIDE_FRAME;
	self->tx_buff.data = self->tx_buff.head;
	self->rx_buff.data = self->rx_buff.head;

	/* Reset Tx queue info */
	self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0;
	self->tx_fifo.tail = self->tx_buff.head;

	/* Override the network functions we need to use */
	dev->netdev_ops = &via_ircc_sir_ops;

	err = register_netdev(dev);
	if (err)
		goto err_out4;

	IRDA_MESSAGE("IrDA: Registered device %s (via-ircc)\n", dev->name);

	/* Initialise the hardware..
	*/
	self->io.speed = 9600;
	via_hw_init(self);
	return 0;
 err_out4:
	dma_free_coherent(&pdev->dev, self->tx_buff.truesize,
			  self->tx_buff.head, self->tx_buff_dma);
 err_out3:
	dma_free_coherent(&pdev->dev, self->rx_buff.truesize,
			  self->rx_buff.head, self->rx_buff_dma);
 err_out2:
	release_region(self->io.fir_base, self->io.fir_ext);
 err_out1:
	free_netdev(dev);
	return err;
}

/*
 * Function via_remove_one(pdev)
 *
 *    Close driver instance
 *
 */
static void via_remove_one(struct pci_dev *pdev)
{
	struct via_ircc_cb *self = pci_get_drvdata(pdev);
	int iobase;

	IRDA_DEBUG(3, "%s()\n", __func__);

	iobase = self->io.fir_base;

	ResetChip(iobase, 5);	//hardware reset.
	/* Remove netdevice */
	unregister_netdev(self->netdev);

	/* Release the PORT that this driver is using */
	IRDA_DEBUG(2, "%s(), Releasing Region %03x\n",
		   __func__, self->io.fir_base);
	release_region(self->io.fir_base, self->io.fir_ext);
	if (self->tx_buff.head)
		dma_free_coherent(&pdev->dev, self->tx_buff.truesize,
				  self->tx_buff.head, self->tx_buff_dma);
	if (self->rx_buff.head)
		dma_free_coherent(&pdev->dev, self->rx_buff.truesize,
				  self->rx_buff.head, self->rx_buff_dma);

	free_netdev(self->netdev);

	pci_disable_device(pdev);
}

/*
 * Function via_hw_init(self)
 *
 *    Returns non-negative on success.
 *
 * Formerly via_ircc_setup 
 */
static void via_hw_init(struct via_ircc_cb *self)
{
	int iobase = self->io.fir_base;

	IRDA_DEBUG(3, "%s()\n", __func__);

	SetMaxRxPacketSize(iobase, 0x0fff);	//set to max:4095
	// FIFO Init
	EnRXFIFOReadyInt(iobase, OFF);
	EnRXFIFOHalfLevelInt(iobase, OFF);
	EnTXFIFOHalfLevelInt(iobase, OFF);
	EnTXFIFOUnderrunEOMInt(iobase, ON);
	EnTXFIFOReadyInt(iobase, OFF);
	InvertTX(iobase, OFF);
	InvertRX(iobase, OFF);

	if (ReadLPCReg(0x20) == 0x3c)
		WriteLPCReg(0xF0, 0);	// for VT1211
	/* Int Init */
	EnRXSpecInt(iobase, ON);

	/* The following is basically hwreset */
	/* If this is the case, why not just call hwreset() ? Jean II */
	ResetChip(iobase, 5);
	EnableDMA(iobase, OFF);
	EnableTX(iobase, OFF);
	EnableRX(iobase, OFF);
	EnRXDMA(iobase, OFF);
	EnTXDMA(iobase, OFF);
	RXStart(iobase, OFF);
	TXStart(iobase, OFF);
	InitCard(iobase);
	CommonInit(iobase);
	SIRFilter(iobase, ON);
	SetSIR(iobase, ON);
	CRC16(iobase, ON);
	EnTXCRC(iobase, 0);
	WriteReg(iobase, I_ST_CT_0, 0x00);
	SetBaudRate(iobase, 9600);
	SetPulseWidth(iobase, 12);
	SetSendPreambleCount(iobase, 0);

	self->io.speed = 9600;
	self->st_fifo.len = 0;

	via_ircc_change_dongle_speed(iobase, self->io.speed,
				     self->io.dongle_id);

	WriteReg(iobase, I_ST_CT_0, 0x80);
}

/*
 * Function via_ircc_read_dongle_id (void)
 *
 */
static int via_ircc_read_dongle_id(int iobase)
{
	IRDA_ERROR("via-ircc: dongle probing not supported, please specify dongle_id module parameter.\n");
	return 9;	/* Default to IBM */
}

/*
 * Function via_ircc_change_dongle_speed (iobase, speed, dongle_id)
 *    Change speed of the attach dongle
 *    only implement two type of dongle currently.
 */
static void via_ircc_change_dongle_speed(int iobase, int speed,
					 int dongle_id)
{
	u8 mode = 0;

	/* speed is unused, as we use IsSIROn()/IsMIROn() */
	speed = speed;

	IRDA_DEBUG(1, "%s(): change_dongle_speed to %d for 0x%x, %d\n",
		   __func__, speed, iobase, dongle_id);

	switch (dongle_id) {

		/* Note: The dongle_id's listed here are derived from
		 * nsc-ircc.c */ 

	case 0x08:		/* HP HSDL-2300, HP HSDL-3600/HSDL-3610 */
		UseOneRX(iobase, ON);	// use one RX pin   RX1,RX2
		InvertTX(iobase, OFF);
		InvertRX(iobase, OFF);

		EnRX2(iobase, ON);	//sir to rx2
		EnGPIOtoRX2(iobase, OFF);

		if (IsSIROn(iobase)) {	//sir
			// Mode select Off
			SlowIRRXLowActive(iobase, ON);
			udelay(1000);
			SlowIRRXLowActive(iobase, OFF);
		} else {
			if (IsMIROn(iobase)) {	//mir
				// Mode select On
				SlowIRRXLowActive(iobase, OFF);
				udelay(20);
			} else {	// fir
				if (IsFIROn(iobase)) {	//fir
					// Mode select On
					SlowIRRXLowActive(iobase, OFF);
					udelay(20);
				}
			}
		}
		break;

	case 0x09:		/* IBM31T1100 or Temic TFDS6000/TFDS6500 */
		UseOneRX(iobase, ON);	//use ONE RX....RX1
		InvertTX(iobase, OFF);
		InvertRX(iobase, OFF);	// invert RX pin

		EnRX2(iobase, ON);
		EnGPIOtoRX2(iobase, OFF);
		if (IsSIROn(iobase)) {	//sir
			// Mode select On
			SlowIRRXLowActive(iobase, ON);
			udelay(20);
			// Mode select Off
			SlowIRRXLowActive(iobase, OFF);
		}
		if (IsMIROn(iobase)) {	//mir
			// Mode select On
			SlowIRRXLowActive(iobase, OFF);
			udelay(20);
			// Mode select Off
			SlowIRRXLowActive(iobase, ON);
		} else {	// fir
			if (IsFIROn(iobase)) {	//fir
				// Mode select On
				SlowIRRXLowActive(iobase, OFF);
				// TX On
				WriteTX(iobase, ON);
				udelay(20);
				// Mode select OFF
				SlowIRRXLowActive(iobase, ON);
				udelay(20);
				// TX Off
				WriteTX(iobase, OFF);
			}
		}
		break;

	case 0x0d:
		UseOneRX(iobase, OFF);	// use two RX pin   RX1,RX2
		InvertTX(iobase, OFF);
		InvertRX(iobase, OFF);
		SlowIRRXLowActive(iobase, OFF);
		if (IsSIROn(iobase)) {	//sir
			EnGPIOtoRX2(iobase, OFF);
			WriteGIO(iobase, OFF);
			EnRX2(iobase, OFF);	//sir to rx2
		} else {	// fir mir
			EnGPIOtoRX2(iobase, OFF);
			WriteGIO(iobase, OFF);
			EnRX2(iobase, OFF);	//fir to rx
		}
		break;

	case 0x11:		/* Temic TFDS4500 */

		IRDA_DEBUG(2, "%s: Temic TFDS4500: One RX pin, TX normal, RX inverted.\n", __func__);

		UseOneRX(iobase, ON);	//use ONE RX....RX1
		InvertTX(iobase, OFF);
		InvertRX(iobase, ON);	// invert RX pin
	
		EnRX2(iobase, ON);	//sir to rx2
		EnGPIOtoRX2(iobase, OFF);

		if( IsSIROn(iobase) ){	//sir

			// Mode select On
			SlowIRRXLowActive(iobase, ON);
			udelay(20);
			// Mode select Off
			SlowIRRXLowActive(iobase, OFF);

		} else{
			IRDA_DEBUG(0, "%s: Warning: TFDS4500 not running in SIR mode !\n", __func__);
		}
		break;

	case 0x0ff:		/* Vishay */
		if (IsSIROn(iobase))
			mode = 0;
		else if (IsMIROn(iobase))
			mode = 1;
		else if (IsFIROn(iobase))
			mode = 2;
		else if (IsVFIROn(iobase))
			mode = 5;	//VFIR-16
		SI_SetMode(iobase, mode);
		break;

	default:
		IRDA_ERROR("%s: Error: dongle_id %d unsupported !\n",
			   __func__, dongle_id);
	}
}

/*
 * Function via_ircc_change_speed (self, baud)
 *
 *    Change the speed of the device
 *
 */
static void via_ircc_change_speed(struct via_ircc_cb *self, __u32 speed)
{
	struct net_device *dev = self->netdev;
	u16 iobase;
	u8 value = 0, bTmp;

	iobase = self->io.fir_base;
	/* Update accounting for new speed */
	self->io.speed = speed;
	IRDA_DEBUG(1, "%s: change_speed to %d bps.\n", __func__, speed);

	WriteReg(iobase, I_ST_CT_0, 0x0);

	/* Controller mode sellection */
	switch (speed) {
	case 2400:
	case 9600:
	case 19200:
	case 38400:
	case 57600:
	case 115200:
		value = (115200/speed)-1;
		SetSIR(iobase, ON);
		CRC16(iobase, ON);
		break;
	case 576000:
		/* FIXME: this can't be right, as it's the same as 115200,
		 * and 576000 is MIR, not SIR. */
		value = 0;
		SetSIR(iobase, ON);
		CRC16(iobase, ON);
		break;
	case 1152000:
		value = 0;
		SetMIR(iobase, ON);
		/* FIXME: CRC ??? */
		break;
	case 4000000:
		value = 0;
		SetFIR(iobase, ON);
		SetPulseWidth(iobase, 0);
		SetSendPreambleCount(iobase, 14);
		CRC16(iobase, OFF);
		EnTXCRC(iobase, ON);
		break;
	case 16000000:
		value = 0;
		SetVFIR(iobase, ON);
		/* FIXME: CRC ??? */
		break;
	default:
		value = 0;
		break;
	}

	/* Set baudrate to 0x19[2..7] */
	bTmp = (ReadReg(iobase, I_CF_H_1) & 0x03);
	bTmp |= value << 2;
	WriteReg(iobase, I_CF_H_1, bTmp);

	/* Some dongles may need to be informed about speed changes. */
	via_ircc_change_dongle_speed(iobase, speed, self->io.dongle_id);

	/* Set FIFO size to 64 */
	SetFIFO(iobase, 64);

	/* Enable IR */
	WriteReg(iobase, I_ST_CT_0, 0x80);

	// EnTXFIFOHalfLevelInt(iobase,ON);

	/* Enable some interrupts so we can receive frames */
	//EnAllInt(iobase,ON);

	if (IsSIROn(iobase)) {
		SIRFilter(iobase, ON);
		SIRRecvAny(iobase, ON);
	} else {
		SIRFilter(iobase, OFF);
		SIRRecvAny(iobase, OFF);
	}

	if (speed > 115200) {
		/* Install FIR xmit handler */
		dev->netdev_ops = &via_ircc_fir_ops;
		via_ircc_dma_receive(self);
	} else {
		/* Install SIR xmit handler */
		dev->netdev_ops = &via_ircc_sir_ops;
	}
	netif_wake_queue(dev);
}

/*
 * Function via_ircc_hard_xmit (skb, dev)
 *
 *    Transmit the frame!
 *
 */
static netdev_tx_t via_ircc_hard_xmit_sir(struct sk_buff *skb,
						struct net_device *dev)
{
	struct via_ircc_cb *self;
	unsigned long flags;
	u16 iobase;
	__u32 speed;

	self = netdev_priv(dev);
	IRDA_ASSERT(self != NULL, return NETDEV_TX_OK;);
	iobase = self->io.fir_base;

	netif_stop_queue(dev);
	/* Check if we need to change the speed */
	speed = irda_get_next_speed(skb);
	if ((speed != self->io.speed) && (speed != -1)) {
		/* Check for empty frame */
		if (!skb->len) {
			via_ircc_change_speed(self, speed);
			dev->trans_start = jiffies;
			dev_kfree_skb(skb);
			return NETDEV_TX_OK;
		} else
			self->new_speed = speed;
	}
	InitCard(iobase);
	CommonInit(iobase);
	SIRFilter(iobase, ON);
	SetSIR(iobase, ON);
	CRC16(iobase, ON);
	EnTXCRC(iobase, 0);
	WriteReg(iobase, I_ST_CT_0, 0x00);

	spin_lock_irqsave(&self->lock, flags);
	self->tx_buff.data = self->tx_buff.head;
	self->tx_buff.len =
	    async_wrap_skb(skb, self->tx_buff.data,
			   self->tx_buff.truesize);

	dev->stats.tx_bytes += self->tx_buff.len;
	/* Send this frame with old speed */
	SetBaudRate(iobase, self->io.speed);
	SetPulseWidth(iobase, 12);
	SetSendPreambleCount(iobase, 0);
	WriteReg(iobase, I_ST_CT_0, 0x80);

	EnableTX(iobase, ON);
	EnableRX(iobase, OFF);

	ResetChip(iobase, 0);
	ResetChip(iobase, 1);
	ResetChip(iobase, 2);
	ResetChip(iobase, 3);
	ResetChip(iobase, 4);

	EnAllInt(iobase, ON);
	EnTXDMA(iobase, ON);
	EnRXDMA(iobase, OFF);

	irda_setup_dma(self->io.dma, self->tx_buff_dma, self->tx_buff.len,
		       DMA_TX_MODE);

	SetSendByte(iobase, self->tx_buff.len);
	RXStart(iobase, OFF);
	TXStart(iobase, ON);

	dev->trans_start = jiffies;
	spin_unlock_irqrestore(&self->lock, flags);
	dev_kfree_skb(skb);
	return NETDEV_TX_OK;
}

static netdev_tx_t via_ircc_hard_xmit_fir(struct sk_buff *skb,
						struct net_device *dev)
{
	struct via_ircc_cb *self;
	u16 iobase;
	__u32 speed;
	unsigned long flags;

	self = netdev_priv(dev);
	iobase = self->io.fir_base;

	if (self->st_fifo.len)
		return NETDEV_TX_OK;
	if (self->chip_id == 0x3076)
		iodelay(1500);
	else
		udelay(1500);
	netif_stop_queue(dev);
	speed = irda_get_next_speed(skb);
	if ((speed != self->io.speed) && (speed != -1)) {
		if (!skb->len) {
			via_ircc_change_speed(self, speed);
			dev->trans_start = jiffies;
			dev_kfree_skb(skb);
			return NETDEV_TX_OK;
		} else
			self->new_speed = speed;
	}
	spin_lock_irqsave(&self->lock, flags);
	self->tx_fifo.queue[self->tx_fifo.free].start = self->tx_fifo.tail;
	self->tx_fifo.queue[self->tx_fifo.free].len = skb->len;

	self->tx_fifo.tail += skb->len;
	dev->stats.tx_bytes += skb->len;
	skb_copy_from_linear_data(skb,
		      self->tx_fifo.queue[self->tx_fifo.free].start, skb->len);
	self->tx_fifo.len++;
	self->tx_fifo.free++;
//F01   if (self->tx_fifo.len == 1) {
	via_ircc_dma_xmit(self, iobase);
//F01   }
//F01   if (self->tx_fifo.free < (MAX_TX_WINDOW -1 )) netif_wake_queue(self->netdev);
	dev->trans_start = jiffies;
	dev_kfree_skb(skb);
	spin_unlock_irqrestore(&self->lock, flags);
	return NETDEV_TX_OK;

}

static int via_ircc_dma_xmit(struct via_ircc_cb *self, u16 iobase)
{
	EnTXDMA(iobase, OFF);
	self->io.direction = IO_XMIT;
	EnPhys(iobase, ON);
	EnableTX(iobase, ON);
	EnableRX(iobase, OFF);
	ResetChip(iobase, 0);
	ResetChip(iobase, 1);
	ResetChip(iobase, 2);
	ResetChip(iobase, 3);
	ResetChip(iobase, 4);
	EnAllInt(iobase, ON);
	EnTXDMA(iobase, ON);
	EnRXDMA(iobase, OFF);
	irda_setup_dma(self->io.dma,
		       ((u8 *)self->tx_fifo.queue[self->tx_fifo.ptr].start -
			self->tx_buff.head) + self->tx_buff_dma,
		       self->tx_fifo.queue[self->tx_fifo.ptr].len, DMA_TX_MODE);
	IRDA_DEBUG(1, "%s: tx_fifo.ptr=%x,len=%x,tx_fifo.len=%x..\n",
		   __func__, self->tx_fifo.ptr,
		   self->tx_fifo.queue[self->tx_fifo.ptr].len,
		   self->tx_fifo.len);

	SetSendByte(iobase, self->tx_fifo.queue[self->tx_fifo.ptr].len);
	RXStart(iobase, OFF);
	TXStart(iobase, ON);
	return 0;

}

/*
 * Function via_ircc_dma_xmit_complete (self)
 *
 *    The transfer of a frame in finished. This function will only be called 
 *    by the interrupt handler
 *
 */
static int via_ircc_dma_xmit_complete(struct via_ircc_cb *self)
{
	int iobase;
	u8 Tx_status;

	IRDA_DEBUG(3, "%s()\n", __func__);

	iobase = self->io.fir_base;
	/* Disable DMA */
//      DisableDmaChannel(self->io.dma);
	/* Check for underrun! */
	/* Clear bit, by writing 1 into it */
	Tx_status = GetTXStatus(iobase);
	if (Tx_status & 0x08) {
		self->netdev->stats.tx_errors++;
		self->netdev->stats.tx_fifo_errors++;
		hwreset(self);
	/* how to clear underrun? */
	} else {
		self->netdev->stats.tx_packets++;
		ResetChip(iobase, 3);
		ResetChip(iobase, 4);
	}
	/* Check if we need to change the speed */
	if (self->new_speed) {
		via_ircc_change_speed(self, self->new_speed);
		self->new_speed = 0;
	}

	/* Finished with this frame, so prepare for next */
	if (IsFIROn(iobase)) {
		if (self->tx_fifo.len) {
			self->tx_fifo.len--;
			self->tx_fifo.ptr++;
		}
	}
	IRDA_DEBUG(1,
		   "%s: tx_fifo.len=%x ,tx_fifo.ptr=%x,tx_fifo.free=%x...\n",
		   __func__,
		   self->tx_fifo.len, self->tx_fifo.ptr, self->tx_fifo.free);
/* F01_S
	// Any frames to be sent back-to-back? 
	if (self->tx_fifo.len) {
		// Not finished yet! 
	  	via_ircc_dma_xmit(self, iobase);
		ret = FALSE;
	} else { 
F01_E*/
	// Reset Tx FIFO info 
	self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0;
	self->tx_fifo.tail = self->tx_buff.head;
//F01   }

	// Make sure we have room for more frames 
//F01   if (self->tx_fifo.free < (MAX_TX_WINDOW -1 )) {
	// Not busy transmitting anymore 
	// Tell the network layer, that we can accept more frames 
	netif_wake_queue(self->netdev);
//F01   }
	return TRUE;
}

/*
 * Function via_ircc_dma_receive (self)
 *
 *    Set configuration for receive a frame.
 *
 */
static int via_ircc_dma_receive(struct via_ircc_cb *self)
{
	int iobase;

	iobase = self->io.fir_base;

	IRDA_DEBUG(3, "%s()\n", __func__);

	self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0;
	self->tx_fifo.tail = self->tx_buff.head;
	self->RxDataReady = 0;
	self->io.direction = IO_RECV;
	self->rx_buff.data = self->rx_buff.head;
	self->st_fifo.len = self->st_fifo.pending_bytes = 0;
	self->st_fifo.tail = self->st_fifo.head = 0;

	EnPhys(iobase, ON);
	EnableTX(iobase, OFF);
	EnableRX(iobase, ON);

	ResetChip(iobase, 0);
	ResetChip(iobase, 1);
	ResetChip(iobase, 2);
	ResetChip(iobase, 3);
	ResetChip(iobase, 4);

	EnAllInt(iobase, ON);
	EnTXDMA(iobase, OFF);
	EnRXDMA(iobase, ON);
	irda_setup_dma(self->io.dma2, self->rx_buff_dma,
		  self->rx_buff.truesize, DMA_RX_MODE);
	TXStart(iobase, OFF);
	RXStart(iobase, ON);

	return 0;
}

/*
 * Function via_ircc_dma_receive_complete (self)
 *
 *    Controller Finished with receiving frames,
 *    and this routine is call by ISR
 *    
 */
static int via_ircc_dma_receive_complete(struct via_ircc_cb *self,
					 int iobase)
{
	struct st_fifo *st_fifo;
	struct sk_buff *skb;
	int len, i;
	u8 status = 0;

	iobase = self->io.fir_base;
	st_fifo = &self->st_fifo;

	if (self->io.speed < 4000000) {	//Speed below FIR
		len = GetRecvByte(iobase, self);
		skb = dev_alloc_skb(len + 1);
		if (skb == NULL)
			return FALSE;
		// Make sure IP header gets aligned 
		skb_reserve(skb, 1);
		skb_put(skb, len - 2);
		if (self->chip_id == 0x3076) {
			for (i = 0; i < len - 2; i++)
				skb->data[i] = self->rx_buff.data[i * 2];
		} else {
			if (self->chip_id == 0x3096) {
				for (i = 0; i < len - 2; i++)
					skb->data[i] =
					    self->rx_buff.data[i];
			}
		}
		// Move to next frame 
		self->rx_buff.data += len;
		self->netdev->stats.rx_bytes += len;
		self->netdev->stats.rx_packets++;
		skb->dev = self->netdev;
		skb_reset_mac_header(skb);
		skb->protocol = htons(ETH_P_IRDA);
		netif_rx(skb);
		return TRUE;
	}

	else {			//FIR mode
		len = GetRecvByte(iobase, self);
		if (len == 0)
			return TRUE;	//interrupt only, data maybe move by RxT  
		if (((len - 4) < 2) || ((len - 4) > 2048)) {
			IRDA_DEBUG(1, "%s(): Trouble:len=%x,CurCount=%x,LastCount=%x..\n",
				   __func__, len, RxCurCount(iobase, self),
				   self->RxLastCount);
			hwreset(self);
			return FALSE;
		}
		IRDA_DEBUG(2, "%s(): fifo.len=%x,len=%x,CurCount=%x..\n",
			   __func__,
			   st_fifo->len, len - 4, RxCurCount(iobase, self));

		st_fifo->entries[st_fifo->tail].status = status;
		st_fifo->entries[st_fifo->tail].len = len;
		st_fifo->pending_bytes += len;
		st_fifo->tail++;
		st_fifo->len++;
		if (st_fifo->tail > MAX_RX_WINDOW)
			st_fifo->tail = 0;
		self->RxDataReady = 0;

		// It maybe have MAX_RX_WINDOW package receive by
		// receive_complete before Timer IRQ
/* F01_S
          if (st_fifo->len < (MAX_RX_WINDOW+2 )) { 
		  RXStart(iobase,ON);
	  	  SetTimer(iobase,4);
	  }
	  else	  { 
F01_E */
		EnableRX(iobase, OFF);
		EnRXDMA(iobase, OFF);
		RXStart(iobase, OFF);
//F01_S
		// Put this entry back in fifo 
		if (st_fifo->head > MAX_RX_WINDOW)
			st_fifo->head = 0;
		status = st_fifo->entries[st_fifo->head].status;
		len = st_fifo->entries[st_fifo->head].len;
		st_fifo->head++;
		st_fifo->len--;

		skb = dev_alloc_skb(len + 1 - 4);
		/*
		 * if frame size, data ptr, or skb ptr are wrong, then get next
		 * entry.
		 */
		if ((skb == NULL) || (skb->data == NULL) ||
		    (self->rx_buff.data == NULL) || (len < 6)) {
			self->netdev->stats.rx_dropped++;
			kfree_skb(skb);
			return TRUE;
		}
		skb_reserve(skb, 1);
		skb_put(skb, len - 4);

		skb_copy_to_linear_data(skb, self->rx_buff.data, len - 4);
		IRDA_DEBUG(2, "%s(): len=%x.rx_buff=%p\n", __func__,
			   len - 4, self->rx_buff.data);

		// Move to next frame 
		self->rx_buff.data += len;
		self->netdev->stats.rx_bytes += len;
		self->netdev->stats.rx_packets++;
		skb->dev = self->netdev;
		skb_reset_mac_header(skb);
		skb->protocol = htons(ETH_P_IRDA);
		netif_rx(skb);

//F01_E
	}			//FIR
	return TRUE;

}

/*
 * if frame is received , but no INT ,then use this routine to upload frame.
 */
static int upload_rxdata(struct via_ircc_cb *self, int iobase)
{
	struct sk_buff *skb;
	int len;
	struct st_fifo *st_fifo;
	st_fifo = &self->st_fifo;

	len = GetRecvByte(iobase, self);

	IRDA_DEBUG(2, "%s(): len=%x\n", __func__, len);

	if ((len - 4) < 2) {
		self->netdev->stats.rx_dropped++;
		return FALSE;
	}

	skb = dev_alloc_skb(len + 1);
	if (skb == NULL) {
		self->netdev->stats.rx_dropped++;
		return FALSE;
	}
	skb_reserve(skb, 1);
	skb_put(skb, len - 4 + 1);
	skb_copy_to_linear_data(skb, self->rx_buff.data, len - 4 + 1);
	st_fifo->tail++;
	st_fifo->len++;
	if (st_fifo->tail > MAX_RX_WINDOW)
		st_fifo->tail = 0;
	// Move to next frame 
	self->rx_buff.data += len;
	self->netdev->stats.rx_bytes += len;
	self->netdev->stats.rx_packets++;
	skb->dev = self->netdev;
	skb_reset_mac_header(skb);
	skb->protocol = htons(ETH_P_IRDA);
	netif_rx(skb);
	if (st_fifo->len < (MAX_RX_WINDOW + 2)) {
		RXStart(iobase, ON);
	} else {
		EnableRX(iobase, OFF);
		EnRXDMA(iobase, OFF);
		RXStart(iobase, OFF);
	}
	return TRUE;
}

/*
 * Implement back to back receive , use this routine to upload data.
 */

static int RxTimerHandler(struct via_ircc_cb *self, int iobase)
{
	struct st_fifo *st_fifo;
	struct sk_buff *skb;
	int len;
	u8 status;

	st_fifo = &self->st_fifo;

	if (CkRxRecv(iobase, self)) {
		// if still receiving ,then return ,don't upload frame 
		self->RetryCount = 0;
		SetTimer(iobase, 20);
		self->RxDataReady++;
		return FALSE;
	} else
		self->RetryCount++;

	if ((self->RetryCount >= 1) ||
	    ((st_fifo->pending_bytes + 2048) > self->rx_buff.truesize) ||
	    (st_fifo->len >= (MAX_RX_WINDOW))) {
		while (st_fifo->len > 0) {	//upload frame
			// Put this entry back in fifo 
			if (st_fifo->head > MAX_RX_WINDOW)
				st_fifo->head = 0;
			status = st_fifo->entries[st_fifo->head].status;
			len = st_fifo->entries[st_fifo->head].len;
			st_fifo->head++;
			st_fifo->len--;

			skb = dev_alloc_skb(len + 1 - 4);
			/*
			 * if frame size, data ptr, or skb ptr are wrong,
			 * then get next entry.
			 */
			if ((skb == NULL) || (skb->data == NULL) ||
			    (self->rx_buff.data == NULL) || (len < 6)) {
				self->netdev->stats.rx_dropped++;
				continue;
			}
			skb_reserve(skb, 1);
			skb_put(skb, len - 4);
			skb_copy_to_linear_data(skb, self->rx_buff.data, len - 4);

			IRDA_DEBUG(2, "%s(): len=%x.head=%x\n", __func__,
				   len - 4, st_fifo->head);

			// Move to next frame 
			self->rx_buff.data += len;
			self->netdev->stats.rx_bytes += len;
			self->netdev->stats.rx_packets++;
			skb->dev = self->netdev;
			skb_reset_mac_header(skb);
			skb->protocol = htons(ETH_P_IRDA);
			netif_rx(skb);
		}		//while
		self->RetryCount = 0;

		IRDA_DEBUG(2,
			   "%s(): End of upload HostStatus=%x,RxStatus=%x\n",
			   __func__,
			   GetHostStatus(iobase), GetRXStatus(iobase));

		/*
		 * if frame is receive complete at this routine ,then upload
		 * frame.
		 */
		if ((GetRXStatus(iobase) & 0x10) &&
		    (RxCurCount(iobase, self) != self->RxLastCount)) {
			upload_rxdata(self, iobase);
			if (irda_device_txqueue_empty(self->netdev))
				via_ircc_dma_receive(self);
		}
	}			// timer detect complete
	else
		SetTimer(iobase, 4);
	return TRUE;

}



/*
 * Function via_ircc_interrupt (irq, dev_id)
 *
 *    An interrupt from the chip has arrived. Time to do some work
 *
 */
static irqreturn_t via_ircc_interrupt(int dummy, void *dev_id)
{
	struct net_device *dev = dev_id;
	struct via_ircc_cb *self = netdev_priv(dev);
	int iobase;
	u8 iHostIntType, iRxIntType, iTxIntType;

	iobase = self->io.fir_base;
	spin_lock(&self->lock);
	iHostIntType = GetHostStatus(iobase);

	IRDA_DEBUG(4, "%s(): iHostIntType %02x:  %s %s %s  %02x\n",
		   __func__, iHostIntType,
		   (iHostIntType & 0x40) ? "Timer" : "",
		   (iHostIntType & 0x20) ? "Tx" : "",
		   (iHostIntType & 0x10) ? "Rx" : "",
		   (iHostIntType & 0x0e) >> 1);

	if ((iHostIntType & 0x40) != 0) {	//Timer Event
		self->EventFlag.TimeOut++;
		ClearTimerInt(iobase, 1);
		if (self->io.direction == IO_XMIT) {
			via_ircc_dma_xmit(self, iobase);
		}
		if (self->io.direction == IO_RECV) {
			/*
			 * frame ready hold too long, must reset.
			 */
			if (self->RxDataReady > 30) {
				hwreset(self);
				if (irda_device_txqueue_empty(self->netdev)) {
					via_ircc_dma_receive(self);
				}
			} else {	// call this to upload frame.
				RxTimerHandler(self, iobase);
			}
		}		//RECV
	}			//Timer Event
	if ((iHostIntType & 0x20) != 0) {	//Tx Event
		iTxIntType = GetTXStatus(iobase);

		IRDA_DEBUG(4, "%s(): iTxIntType %02x:  %s %s %s %s\n",
			   __func__, iTxIntType,
			   (iTxIntType & 0x08) ? "FIFO underr." : "",
			   (iTxIntType & 0x04) ? "EOM" : "",
			   (iTxIntType & 0x02) ? "FIFO ready" : "",
			   (iTxIntType & 0x01) ? "Early EOM" : "");

		if (iTxIntType & 0x4) {
			self->EventFlag.EOMessage++;	// read and will auto clean
			if (via_ircc_dma_xmit_complete(self)) {
				if (irda_device_txqueue_empty
				    (self->netdev)) {
					via_ircc_dma_receive(self);
				}
			} else {
				self->EventFlag.Unknown++;
			}
		}		//EOP
	}			//Tx Event
	//----------------------------------------
	if ((iHostIntType & 0x10) != 0) {	//Rx Event
		/* Check if DMA has finished */
		iRxIntType = GetRXStatus(iobase);

		IRDA_DEBUG(4, "%s(): iRxIntType %02x:  %s %s %s %s %s %s %s\n",
			   __func__, iRxIntType,
			   (iRxIntType & 0x80) ? "PHY err."	: "",
			   (iRxIntType & 0x40) ? "CRC err"	: "",
			   (iRxIntType & 0x20) ? "FIFO overr."	: "",
			   (iRxIntType & 0x10) ? "EOF"		: "",
			   (iRxIntType & 0x08) ? "RxData"	: "",
			   (iRxIntType & 0x02) ? "RxMaxLen"	: "",
			   (iRxIntType & 0x01) ? "SIR bad"	: "");
		if (!iRxIntType)
			IRDA_DEBUG(3, "%s(): RxIRQ =0\n", __func__);

		if (iRxIntType & 0x10) {
			if (via_ircc_dma_receive_complete(self, iobase)) {
//F01       if(!(IsFIROn(iobase)))  via_ircc_dma_receive(self);
				via_ircc_dma_receive(self);
			}
		}		// No ERR     
		else {		//ERR
			IRDA_DEBUG(4, "%s(): RxIRQ ERR:iRxIntType=%x,HostIntType=%x,CurCount=%x,RxLastCount=%x_____\n",
				   __func__, iRxIntType, iHostIntType,
				   RxCurCount(iobase, self),
				   self->RxLastCount);

			if (iRxIntType & 0x20) {	//FIFO OverRun ERR
				ResetChip(iobase, 0);
				ResetChip(iobase, 1);
			} else {	//PHY,CRC ERR

				if (iRxIntType != 0x08)
					hwreset(self);	//F01
			}
			via_ircc_dma_receive(self);
		}		//ERR

	}			//Rx Event
	spin_unlock(&self->lock);
	return IRQ_RETVAL(iHostIntType);
}

static void hwreset(struct via_ircc_cb *self)
{
	int iobase;
	iobase = self->io.fir_base;

	IRDA_DEBUG(3, "%s()\n", __func__);

	ResetChip(iobase, 5);
	EnableDMA(iobase, OFF);
	EnableTX(iobase, OFF);
	EnableRX(iobase, OFF);
	EnRXDMA(iobase, OFF);
	EnTXDMA(iobase, OFF);
	RXStart(iobase, OFF);
	TXStart(iobase, OFF);
	InitCard(iobase);
	CommonInit(iobase);
	SIRFilter(iobase, ON);
	SetSIR(iobase, ON);
	CRC16(iobase, ON);
	EnTXCRC(iobase, 0);
	WriteReg(iobase, I_ST_CT_0, 0x00);
	SetBaudRate(iobase, 9600);
	SetPulseWidth(iobase, 12);
	SetSendPreambleCount(iobase, 0);
	WriteReg(iobase, I_ST_CT_0, 0x80);

	/* Restore speed. */
	via_ircc_change_speed(self, self->io.speed);

	self->st_fifo.len = 0;
}

/*
 * Function via_ircc_is_receiving (self)
 *
 *    Return TRUE is we are currently receiving a frame
 *
 */
static int via_ircc_is_receiving(struct via_ircc_cb *self)
{
	int status = FALSE;
	int iobase;

	IRDA_ASSERT(self != NULL, return FALSE;);

	iobase = self->io.fir_base;
	if (CkRxRecv(iobase, self))
		status = TRUE;

	IRDA_DEBUG(2, "%s(): status=%x....\n", __func__, status);

	return status;
}


/*
 * Function via_ircc_net_open (dev)
 *
 *    Start the device
 *
 */
static int via_ircc_net_open(struct net_device *dev)
{
	struct via_ircc_cb *self;
	int iobase;
	char hwname[32];

	IRDA_DEBUG(3, "%s()\n", __func__);

	IRDA_ASSERT(dev != NULL, return -1;);
	self = netdev_priv(dev);
	dev->stats.rx_packets = 0;
	IRDA_ASSERT(self != NULL, return 0;);
	iobase = self->io.fir_base;
	if (request_irq(self->io.irq, via_ircc_interrupt, 0, dev->name, dev)) {
		IRDA_WARNING("%s, unable to allocate irq=%d\n", driver_name,
			     self->io.irq);
		return -EAGAIN;
	}
	/*
	 * Always allocate the DMA channel after the IRQ, and clean up on 
	 * failure.
	 */
	if (request_dma(self->io.dma, dev->name)) {
		IRDA_WARNING("%s, unable to allocate dma=%d\n", driver_name,
			     self->io.dma);
		free_irq(self->io.irq, dev);
		return -EAGAIN;
	}
	if (self->io.dma2 != self->io.dma) {
		if (request_dma(self->io.dma2, dev->name)) {
			IRDA_WARNING("%s, unable to allocate dma2=%d\n",
				     driver_name, self->io.dma2);
			free_irq(self->io.irq, dev);
			free_dma(self->io.dma);
			return -EAGAIN;
		}
	}


	/* turn on interrupts */
	EnAllInt(iobase, ON);
	EnInternalLoop(iobase, OFF);
	EnExternalLoop(iobase, OFF);

	/* */
	via_ircc_dma_receive(self);

	/* Ready to play! */
	netif_start_queue(dev);

	/* 
	 * Open new IrLAP layer instance, now that everything should be
	 * initialized properly 
	 */
	sprintf(hwname, "VIA @ 0x%x", iobase);
	self->irlap = irlap_open(dev, &self->qos, hwname);

	self->RxLastCount = 0;

	return 0;
}

/*
 * Function via_ircc_net_close (dev)
 *
 *    Stop the device
 *
 */
static int via_ircc_net_close(struct net_device *dev)
{
	struct via_ircc_cb *self;
	int iobase;

	IRDA_DEBUG(3, "%s()\n", __func__);

	IRDA_ASSERT(dev != NULL, return -1;);
	self = netdev_priv(dev);
	IRDA_ASSERT(self != NULL, return 0;);

	/* Stop device */
	netif_stop_queue(dev);
	/* Stop and remove instance of IrLAP */
	if (self->irlap)
		irlap_close(self->irlap);
	self->irlap = NULL;
	iobase = self->io.fir_base;
	EnTXDMA(iobase, OFF);
	EnRXDMA(iobase, OFF);
	DisableDmaChannel(self->io.dma);

	/* Disable interrupts */
	EnAllInt(iobase, OFF);
	free_irq(self->io.irq, dev);
	free_dma(self->io.dma);
	if (self->io.dma2 != self->io.dma)
		free_dma(self->io.dma2);

	return 0;
}

/*
 * Function via_ircc_net_ioctl (dev, rq, cmd)
 *
 *    Process IOCTL commands for this device
 *
 */
static int via_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq,
			      int cmd)
{
	struct if_irda_req *irq = (struct if_irda_req *) rq;
	struct via_ircc_cb *self;
	unsigned long flags;
	int ret = 0;

	IRDA_ASSERT(dev != NULL, return -1;);
	self = netdev_priv(dev);
	IRDA_ASSERT(self != NULL, return -1;);
	IRDA_DEBUG(1, "%s(), %s, (cmd=0x%X)\n", __func__, dev->name,
		   cmd);
	/* Disable interrupts & save flags */
	spin_lock_irqsave(&self->lock, flags);
	switch (cmd) {
	case SIOCSBANDWIDTH:	/* Set bandwidth */
		if (!capable(CAP_NET_ADMIN)) {
			ret = -EPERM;
			goto out;
		}
		via_ircc_change_speed(self, irq->ifr_baudrate);
		break;
	case SIOCSMEDIABUSY:	/* Set media busy */
		if (!capable(CAP_NET_ADMIN)) {
			ret = -EPERM;
			goto out;
		}
		irda_device_set_media_busy(self->netdev, TRUE);
		break;
	case SIOCGRECEIVING:	/* Check if we are receiving right now */
		irq->ifr_receiving = via_ircc_is_receiving(self);
		break;
	default:
		ret = -EOPNOTSUPP;
	}
      out:
	spin_unlock_irqrestore(&self->lock, flags);
	return ret;
}

MODULE_AUTHOR("VIA Technologies,inc");
MODULE_DESCRIPTION("VIA IrDA Device Driver");
MODULE_LICENSE("GPL");

module_init(via_ircc_init);
module_exit(via_ircc_cleanup);