aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/char/rio/rio_linux.c
blob: 7085a38532b3ccc9cc1a73fe5f68eb2e3f064c70 (plain) (blame)
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

/* rio_linux.c -- Linux driver for the Specialix RIO series cards. 
 *
 *
 *   (C) 1999 R.E.Wolff@BitWizard.nl
 *
 * Specialix pays for the development and support of this driver.
 * Please DO contact support@specialix.co.uk if you require
 * support. But please read the documentation (rio.txt) first.
 *
 *
 *
 *      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., 675 Mass Ave, Cambridge, MA 02139,
 *      USA.
 *
 * Revision history:
 * $Log: rio.c,v $
 * Revision 1.1  1999/07/11 10:13:54  wolff
 * Initial revision
 *
 * */

#include <linux/module.h>
#include <linux/config.h> 
#include <linux/kdev_t.h>
#include <asm/io.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/ioport.h>
#include <linux/interrupt.h>
#include <linux/errno.h>
#include <linux/tty.h>
#include <linux/tty_flip.h>
#include <linux/mm.h>
#include <linux/serial.h>
#include <linux/fcntl.h>
#include <linux/major.h>
#include <linux/delay.h>
#include <linux/pci.h>
#include <linux/slab.h>
#include <linux/miscdevice.h>
#include <linux/init.h>

#include <linux/generic_serial.h>
#include <asm/uaccess.h>

#include "linux_compat.h"
#include "typdef.h"
#include "pkt.h"
#include "daemon.h"
#include "rio.h"
#include "riospace.h"
#include "top.h"
#include "cmdpkt.h"
#include "map.h"
#include "riotypes.h"
#include "rup.h"
#include "port.h"
#include "riodrvr.h"
#include "rioinfo.h"
#include "func.h"
#include "errors.h"
#include "pci.h"

#include "parmmap.h"
#include "unixrup.h"
#include "board.h"
#include "host.h"
#include "error.h"
#include "phb.h"
#include "link.h"
#include "cmdblk.h"
#include "route.h"
#include "control.h"
#include "cirrus.h"
#include "rioioctl.h"
#include "param.h"
#include "list.h"
#include "sam.h"
#include "protsts.h"
#include "rioboard.h"


#include "rio_linux.h"

/* I don't think that this driver can handle more than 512 ports on
one machine.  Specialix specifies max 4 boards in one machine. I don't
know why. If you want to try anyway you'll have to increase the number
of boards in rio.h.  You'll have to allocate more majors if you need
more than 512 ports.... */

#ifndef RIO_NORMAL_MAJOR0
/* This allows overriding on the compiler commandline, or in a "major.h" 
   include or something like that */
#define RIO_NORMAL_MAJOR0  154
#define RIO_NORMAL_MAJOR1  156
#endif

#ifndef PCI_DEVICE_ID_SPECIALIX_SX_XIO_IO8
#define PCI_DEVICE_ID_SPECIALIX_SX_XIO_IO8 0x2000
#endif

#ifndef RIO_WINDOW_LEN 
#define RIO_WINDOW_LEN 0x10000
#endif


/* Configurable options: 
   (Don't be too sure that it'll work if you toggle them) */

/* Am I paranoid or not ? ;-) */
#undef RIO_PARANOIA_CHECK


/* 20 -> 2000 per second. The card should rate-limit interrupts at 1000
   Hz, but it is user configurable. I don't recommend going above 1000
   Hz. The interrupt ratelimit might trigger if the interrupt is
   shared with a very active other device. 
   undef this if you want to disable the check....
*/
#define IRQ_RATE_LIMIT 200

#if 0
/* Not implemented */
/* 
 * The following defines are mostly for testing purposes. But if you need
 * some nice reporting in your syslog, you can define them also.
 */
#define RIO_REPORT_FIFO
#define RIO_REPORT_OVERRUN
#endif 


/* These constants are derived from SCO Source */
static struct Conf
RIOConf =
{
  /* locator */         "RIO Config here",
  /* startuptime */     HZ*2,           /* how long to wait for card to run */
  /* slowcook */        0,              /* TRUE -> always use line disc. */
  /* intrpolltime */    1,              /* The frequency of OUR polls */
  /* breakinterval */   25,             /* x10 mS XXX: units seem to be 1ms not 10! -- REW*/
  /* timer */           10,             /* mS */
  /* RtaLoadBase */     0x7000,
  /* HostLoadBase */    0x7C00,
  /* XpHz */            5,              /* number of Xprint hits per second */
  /* XpCps */           120,            /* Xprint characters per second */
  /* XpOn */            "\033d#",       /* start Xprint for a wyse 60 */
  /* XpOff */           "\024",         /* end Xprint for a wyse 60 */
  /* MaxXpCps */        2000,           /* highest Xprint speed */
  /* MinXpCps */        10,             /* slowest Xprint speed */
  /* SpinCmds */        1,              /* non-zero for mega fast boots */
  /* First Addr */      0x0A0000,       /* First address to look at */
  /* Last Addr */       0xFF0000,       /* Last address looked at */
  /* BufferSize */      1024,           /* Bytes per port of buffering */
  /* LowWater */        256,            /* how much data left before wakeup */
  /* LineLength */      80,             /* how wide is the console? */
  /* CmdTimeout */      HZ,             /* how long a close command may take */
};




/* Function prototypes */

static void rio_disable_tx_interrupts (void * ptr); 
static void rio_enable_tx_interrupts (void * ptr); 
static void rio_disable_rx_interrupts (void * ptr); 
static void rio_enable_rx_interrupts (void * ptr); 
static int  rio_get_CD (void * ptr); 
static void rio_shutdown_port (void * ptr);
static int  rio_set_real_termios (void  *ptr);
static void rio_hungup (void  *ptr);
static void rio_close (void  *ptr);
static int rio_chars_in_buffer (void * ptr);
static int rio_fw_ioctl (struct inode *inode, struct file *filp,
		         unsigned int cmd, unsigned long arg);
static int rio_init_drivers(void);

static void my_hd (void *addr, int len);

static struct tty_driver *rio_driver, *rio_driver2;

/* The name "p" is a bit non-descript. But that's what the rio-lynxos
sources use all over the place. */
struct rio_info *p;

int rio_debug;


/* You can have the driver poll your card. 
    - Set rio_poll to 1 to poll every timer tick (10ms on Intel). 
      This is used when the card cannot use an interrupt for some reason.
*/
static int rio_poll = 1;


/* These are the only open spaces in my computer. Yours may have more
   or less.... */
static int rio_probe_addrs[]= {0xc0000, 0xd0000, 0xe0000};

#define NR_RIO_ADDRS ARRAY_SIZE(rio_probe_addrs)


/* Set the mask to all-ones. This alas, only supports 32 interrupts. 
   Some architectures may need more. -- Changed to LONG to
   support up to 64 bits on 64bit architectures. -- REW 20/06/99 */
static long rio_irqmask = -1;

MODULE_AUTHOR("Rogier Wolff <R.E.Wolff@bitwizard.nl>, Patrick van de Lageweg <patrick@bitwizard.nl>");
MODULE_DESCRIPTION("RIO driver");
MODULE_LICENSE("GPL");
module_param(rio_poll, int, 0);
module_param(rio_debug, int, 0644);
module_param(rio_irqmask, long, 0);

static struct real_driver rio_real_driver = {
  rio_disable_tx_interrupts,
  rio_enable_tx_interrupts,
  rio_disable_rx_interrupts,
  rio_enable_rx_interrupts,
  rio_get_CD,
  rio_shutdown_port, 
  rio_set_real_termios, 
  rio_chars_in_buffer,
  rio_close,
  rio_hungup,
  NULL
};

/* 
 *  Firmware loader driver specific routines
 *
 */

static struct file_operations rio_fw_fops = {
	.owner		= THIS_MODULE,
	.ioctl		= rio_fw_ioctl,
};

static struct miscdevice rio_fw_device = {
	RIOCTL_MISC_MINOR, "rioctl", &rio_fw_fops
};





#ifdef RIO_PARANOIA_CHECK

/* This doesn't work. Who's paranoid around here? Not me! */

static inline int rio_paranoia_check(struct rio_port const * port,
				    char *name, const char *routine)
{

  static const char *badmagic =
    KERN_ERR "rio: Warning: bad rio port magic number for device %s in %s\n";
  static const char *badinfo =
    KERN_ERR "rio: Warning: null rio port for device %s in %s\n";
 
  if (!port) {
    printk (badinfo, name, routine);
    return 1;
  }
  if (port->magic != RIO_MAGIC) {
    printk (badmagic, name, routine);
    return 1;
  }

  return 0;
}
#else
#define rio_paranoia_check(a,b,c) 0
#endif


#ifdef DEBUG
static void my_hd (void *ad, int len)
{
  int i, j, ch;
  unsigned char *addr = ad;
  
  for (i=0;i<len;i+=16) {
    rio_dprintk (RIO_DEBUG_PARAM, "%08x ", (int) addr+i);
    for (j=0;j<16;j++) {
      rio_dprintk (RIO_DEBUG_PARAM, "%02x %s", addr[j+i], (j==7)?" ":"");
    }
    for (j=0;j<16;j++) {
      ch = addr[j+i];
      rio_dprintk (RIO_DEBUG_PARAM, "%c", (ch < 0x20)?'.':((ch > 0x7f)?'.':ch));
    }
    rio_dprintk (RIO_DEBUG_PARAM, "\n");
  }
}
#else
#define my_hd(ad,len) do{/* nothing*/ } while (0)
#endif


/* Delay a number of jiffies, allowing a signal to interrupt */ 
int RIODelay (struct Port *PortP, int njiffies)
{
  func_enter ();

  rio_dprintk (RIO_DEBUG_DELAY, "delaying %d jiffies\n", njiffies);  
  msleep_interruptible(jiffies_to_msecs(njiffies));
  func_exit();

  if (signal_pending(current))
    return RIO_FAIL;
  else
    return !RIO_FAIL;
}


/* Delay a number of jiffies, disallowing a signal to interrupt */ 
int RIODelay_ni (struct Port *PortP, int njiffies)
{
  func_enter ();

  rio_dprintk (RIO_DEBUG_DELAY, "delaying %d jiffies (ni)\n", njiffies);  
  msleep(jiffies_to_msecs(njiffies));
  func_exit();
  return !RIO_FAIL;
}


int rio_minor(struct tty_struct *tty)
{
	return tty->index + (tty->driver == rio_driver) ? 0 : 256;
}


int rio_ismodem(struct tty_struct *tty)
{
	return 1;
}


static int rio_set_real_termios (void *ptr)
{
  int rv, modem;
  struct tty_struct *tty;
  func_enter();

  tty = ((struct Port *)ptr)->gs.tty;

  modem = rio_ismodem(tty);

  rv = RIOParam( (struct Port *) ptr, CONFIG, modem, 1);

  func_exit ();

  return rv;
}


static void rio_reset_interrupt (struct Host *HostP)
{
  func_enter();

  switch( HostP->Type ) {
  case RIO_AT:
  case RIO_MCA:
  case RIO_PCI:
    WBYTE(HostP->ResetInt , 0xff);
  }

  func_exit();
}


static irqreturn_t rio_interrupt (int irq, void *ptr, struct pt_regs *regs)
{
  struct Host *HostP;
  func_enter ();

  HostP = (struct Host*)ptr; /* &p->RIOHosts[(long)ptr]; */
  rio_dprintk (RIO_DEBUG_IFLOW, "rio: enter rio_interrupt (%d/%d)\n", 
               irq, HostP->Ivec); 

  /* AAargh! The order in which to do these things is essential and
     not trivial. 
     
     - Rate limit goes before "recursive". Otherwise a series of
       recursive calls will hang the machine in the interrupt routine. 

     - hardware twiddling goes before "recursive". Otherwise when we
       poll the card, and a recursive interrupt happens, we won't
       ack the card, so it might keep on interrupting us. (especially
       level sensitive interrupt systems like PCI).

     - Rate limit goes before hardware twiddling. Otherwise we won't
       catch a card that has gone bonkers.

     - The "initialized" test goes after the hardware twiddling. Otherwise
       the card will stick us in the interrupt routine again.

     - The initialized test goes before recursive. 
  */



#ifdef IRQ_RATE_LIMIT
  /* Aaargh! I'm ashamed. This costs more lines-of-code than the
     actual interrupt routine!. (Well, used to when I wrote that comment) */
  {
    static int lastjif;
    static int nintr=0;

    if (lastjif == jiffies) {
      if (++nintr > IRQ_RATE_LIMIT) {
        free_irq (HostP->Ivec, ptr);
        printk (KERN_ERR "rio: Too many interrupts. Turning off interrupt %d.\n", 
                HostP->Ivec);
      }
    } else {
      lastjif = jiffies;
      nintr = 0;
    }
  }
#endif
  rio_dprintk (RIO_DEBUG_IFLOW, "rio: We've have noticed the interrupt\n"); 
  if (HostP->Ivec == irq) {
    /* Tell the card we've noticed the interrupt. */
    rio_reset_interrupt (HostP);
  }

  if ((HostP->Flags & RUN_STATE) != RC_RUNNING)
  	return IRQ_HANDLED;

  if (test_and_set_bit (RIO_BOARD_INTR_LOCK, &HostP->locks)) {
    printk (KERN_ERR "Recursive interrupt! (host %d/irq%d)\n", 
            (int) ptr, HostP->Ivec);
    return IRQ_HANDLED;
  }

  RIOServiceHost(p, HostP, irq);

  rio_dprintk ( RIO_DEBUG_IFLOW, "riointr() doing host %d type %d\n", 
                (int) ptr, HostP->Type);

  clear_bit (RIO_BOARD_INTR_LOCK, &HostP->locks);
  rio_dprintk (RIO_DEBUG_IFLOW, "rio: exit rio_interrupt (%d/%d)\n", 
               irq, HostP->Ivec); 
  func_exit ();
  return IRQ_HANDLED;
}


static void rio_pollfunc (unsigned long data)
{
  func_enter ();

  rio_interrupt (0, &p->RIOHosts[data], NULL);
  p->RIOHosts[data].timer.expires = jiffies + rio_poll;
  add_timer (&p->RIOHosts[data].timer);

  func_exit ();
}


/* ********************************************************************** *
 *                Here are the routines that actually                     *
 *              interface with the generic_serial driver                  *
 * ********************************************************************** */

/* Ehhm. I don't know how to fiddle with interrupts on the Specialix 
   cards. ....   Hmm. Ok I figured it out. You don't.  -- REW */

static void rio_disable_tx_interrupts (void * ptr) 
{
  func_enter();

  /*  port->gs.flags &= ~GS_TX_INTEN; */

  func_exit();
}


static void rio_enable_tx_interrupts (void * ptr) 
{
  struct Port *PortP = ptr;
  /* int hn; */

  func_enter();

  /* hn = PortP->HostP - p->RIOHosts;

     rio_dprintk (RIO_DEBUG_TTY, "Pushing host %d\n", hn);
     rio_interrupt (-1,(void *) hn, NULL); */

  RIOTxEnable((char *) PortP);

  /* 
   * In general we cannot count on "tx empty" interrupts, although
   * the interrupt routine seems to be able to tell the difference. 
   */
  PortP->gs.flags &= ~GS_TX_INTEN;

  func_exit();
}


static void rio_disable_rx_interrupts (void * ptr) 
{
  func_enter();
  func_exit();
}

static void rio_enable_rx_interrupts (void * ptr) 
{
  /*  struct rio_port *port = ptr; */
  func_enter();
  func_exit();
}


/* Jeez. Isn't this simple?  */
static int rio_get_CD (void * ptr) 
{
  struct Port *PortP = ptr;
  int rv;

  func_enter();
  rv = (PortP->ModemState & MSVR1_CD) != 0;

  rio_dprintk (RIO_DEBUG_INIT, "Getting CD status: %d\n", rv);
  
  func_exit();  
  return rv;
}


/* Jeez. Isn't this simple? Actually, we can sync with the actual port
   by just pushing stuff into the queue going to the port... */
static int rio_chars_in_buffer (void * ptr) 
{
  func_enter();

  func_exit();  
  return 0;
}


/* Nothing special here... */
static void rio_shutdown_port (void * ptr) 
{
  struct Port *PortP;

  func_enter();

  PortP = (struct Port *)ptr;
  PortP->gs.tty = NULL;
#if 0
  port->gs.flags &= ~ GS_ACTIVE;
  if (!port->gs.tty) {
    rio_dprintk (RIO_DBUG_TTY, "No tty.\n");
    return;
  }
  if (!port->gs.tty->termios) {
    rio_dprintk (RIO_DEBUG_TTY, "No termios.\n");
    return;
  }
  if (port->gs.tty->termios->c_cflag & HUPCL) {
    rio_setsignals (port, 0, 0);
  }
#endif

  func_exit();
}


/* I haven't the foggiest why the decrement use count has to happen
   here. The whole linux serial drivers stuff needs to be redesigned.
   My guess is that this is a hack to minimize the impact of a bug
   elsewhere. Thinking about it some more. (try it sometime) Try
   running minicom on a serial port that is driven by a modularized
   driver. Have the modem hangup. Then remove the driver module. Then
   exit minicom.  I expect an "oops".  -- REW */
static void rio_hungup (void *ptr)
{
  struct Port *PortP;

  func_enter();
  
  PortP = (struct Port *)ptr;
  PortP->gs.tty = NULL;

  func_exit ();
}


/* The standard serial_close would become shorter if you'd wrap it like
   this. 
   rs_close (...){save_flags;cli;real_close();dec_use_count;restore_flags;}
 */
static void rio_close (void *ptr)
{
  struct Port *PortP;

  func_enter ();

  PortP = (struct Port *)ptr;

  riotclose (ptr);

  if(PortP->gs.count) {
    printk (KERN_ERR "WARNING port count:%d\n", PortP->gs.count);
    PortP->gs.count = 0; 
  }                

  PortP->gs.tty = NULL;
  func_exit ();
}



static int rio_fw_ioctl (struct inode *inode, struct file *filp,
		         unsigned int cmd, unsigned long arg)
{
  int rc = 0;
  func_enter();

  /* The "dev" argument isn't used. */
  rc = riocontrol (p, 0, cmd, (void *)arg, capable(CAP_SYS_ADMIN));

  func_exit ();
  return rc;
}

extern int RIOShortCommand(struct rio_info *p, struct Port *PortP,
               int command, int len, int arg);

static int rio_ioctl (struct tty_struct * tty, struct file * filp, 
                     unsigned int cmd, unsigned long arg)
{
  int rc;
  struct Port *PortP;
  int ival;

  func_enter();

  PortP = (struct Port *)tty->driver_data;

  rc  = 0;
  switch (cmd) {
#if 0
  case TIOCGSOFTCAR:
    rc = put_user(((tty->termios->c_cflag & CLOCAL) ? 1 : 0),
                  (unsigned int *) arg);
    break;
#endif
  case TIOCSSOFTCAR:
    if ((rc = get_user(ival, (unsigned int *) arg)) == 0) {
      tty->termios->c_cflag =
        (tty->termios->c_cflag & ~CLOCAL) |
        (ival ? CLOCAL : 0);
    }
    break;
  case TIOCGSERIAL:
    rc = -EFAULT;
    if (access_ok(VERIFY_WRITE, (void *) arg,
                          sizeof(struct serial_struct)))
      rc = gs_getserial(&PortP->gs, (struct serial_struct *) arg);
    break;
  case TCSBRK:
    if ( PortP->State & RIO_DELETED ) {
      rio_dprintk (RIO_DEBUG_TTY, "BREAK on deleted RTA\n");
      rc = -EIO;      
    } else {
      if (RIOShortCommand(p, PortP, SBREAK, 2, 250) == RIO_FAIL) {
         rio_dprintk (RIO_DEBUG_INTR, "SBREAK RIOShortCommand failed\n");
         rc = -EIO;
      }          
    }
    break;
  case TCSBRKP:
    if ( PortP->State & RIO_DELETED ) {
      rio_dprintk (RIO_DEBUG_TTY, "BREAK on deleted RTA\n");
      rc = -EIO;      
    } else {
      int l;
      l = arg?arg*100:250;
      if (l > 255) l = 255;
      if (RIOShortCommand(p, PortP, SBREAK, 2, arg?arg*100:250) == RIO_FAIL) {
         rio_dprintk (RIO_DEBUG_INTR, "SBREAK RIOShortCommand failed\n");
         rc = -EIO;
      }          
    }
    break;
  case TIOCSSERIAL:
    rc = -EFAULT;
    if (access_ok(VERIFY_READ, (void *) arg,
                          sizeof(struct serial_struct)))
      rc = gs_setserial(&PortP->gs, (struct serial_struct *) arg);
    break;
#if 0
  /*
   * note: these IOCTLs no longer reach here.  Use
   * tiocmset/tiocmget driver methods instead.  The
   * #if 0 disablement predates this comment.
   */
  case TIOCMGET:
    rc = -EFAULT;
    if (access_ok(VERIFY_WRITE, (void *) arg,
                          sizeof(unsigned int))) {
      rc = 0;
      ival = rio_getsignals(port);
      put_user(ival, (unsigned int *) arg);
    }
    break;
  case TIOCMBIS:
    if ((rc = get_user(ival, (unsigned int *) arg)) == 0) {
      rio_setsignals(port, ((ival & TIOCM_DTR) ? 1 : -1),
                           ((ival & TIOCM_RTS) ? 1 : -1));
    }
    break;
  case TIOCMBIC:
    if ((rc = get_user(ival, (unsigned int *) arg)) == 0) {
      rio_setsignals(port, ((ival & TIOCM_DTR) ? 0 : -1),
                           ((ival & TIOCM_RTS) ? 0 : -1));
    }
    break;
  case TIOCMSET:
    if ((rc = get_user(ival, (unsigned int *) arg)) == 0) {
      rio_setsignals(port, ((ival & TIOCM_DTR) ? 1 : 0),
                           ((ival & TIOCM_RTS) ? 1 : 0));
    }
    break;
#endif
  default:
    rc = -ENOIOCTLCMD;
    break;
  }
  func_exit();
  return rc;
}


/* The throttle/unthrottle scheme for the Specialix card is different
 * from other drivers and deserves some explanation. 
 * The Specialix hardware takes care of XON/XOFF
 * and CTS/RTS flow control itself.  This means that all we have to
 * do when signalled by the upper tty layer to throttle/unthrottle is
 * to make a note of it here.  When we come to read characters from the
 * rx buffers on the card (rio_receive_chars()) we look to see if the
 * upper layer can accept more (as noted here in rio_rx_throt[]). 
 * If it can't we simply don't remove chars from the cards buffer. 
 * When the tty layer can accept chars, we again note that here and when
 * rio_receive_chars() is called it will remove them from the cards buffer.
 * The card will notice that a ports buffer has drained below some low
 * water mark and will unflow control the line itself, using whatever
 * flow control scheme is in use for that port. -- Simon Allen
 */

static void rio_throttle (struct tty_struct * tty)
{
  struct Port *port = (struct Port *)tty->driver_data;
  
  func_enter();
  /* If the port is using any type of input flow
   * control then throttle the port.
   */

  if((tty->termios->c_cflag & CRTSCTS) || (I_IXOFF(tty)) ) {
    port->State |= RIO_THROTTLE_RX;
  }

  func_exit();
}


static void rio_unthrottle (struct tty_struct * tty)
{
  struct Port *port = (struct Port *)tty->driver_data;

  func_enter();
  /* Always unthrottle even if flow control is not enabled on
   * this port in case we disabled flow control while the port
   * was throttled
   */

  port->State &= ~RIO_THROTTLE_RX;

  func_exit();
  return;
}





/* ********************************************************************** *
 *                    Here are the initialization routines.               *
 * ********************************************************************** */


static struct vpd_prom *get_VPD_PROM (struct Host *hp)
{
  static struct vpd_prom vpdp;
  char *p;
  int i;

  func_enter();
  rio_dprintk (RIO_DEBUG_PROBE, "Going to verify vpd prom at %p.\n", 
              hp->Caddr + RIO_VPD_ROM);

  p = (char *) &vpdp;
  for (i=0;i< sizeof (struct vpd_prom);i++)
    *p++ = readb (hp->Caddr+RIO_VPD_ROM + i*2);
      /* read_rio_byte (hp, RIO_VPD_ROM + i*2); */

  /* Terminate the identifier string. 
     *** requires one extra byte in struct vpd_prom *** */
  *p++=0; 

  if (rio_debug & RIO_DEBUG_PROBE)
    my_hd ((char *)&vpdp, 0x20);
  
  func_exit();

  return &vpdp;
}

static struct tty_operations rio_ops = {
	.open  = riotopen,
	.close = gs_close,
	.write = gs_write,
	.put_char = gs_put_char,
	.flush_chars = gs_flush_chars,
	.write_room = gs_write_room,
	.chars_in_buffer = gs_chars_in_buffer,
	.flush_buffer = gs_flush_buffer,
	.ioctl = rio_ioctl,
	.throttle = rio_throttle,
	.unthrottle = rio_unthrottle,
	.set_termios = gs_set_termios,
	.stop = gs_stop,
	.start = gs_start,
	.hangup = gs_hangup,
};

static int rio_init_drivers(void)
{
	int error = -ENOMEM;

	rio_driver = alloc_tty_driver(256);
	if (!rio_driver)
		goto out;
	rio_driver2 = alloc_tty_driver(256);
	if (!rio_driver2)
		goto out1;

	func_enter();

	rio_driver->owner = THIS_MODULE;
	rio_driver->driver_name = "specialix_rio";
	rio_driver->name = "ttySR";
	rio_driver->major = RIO_NORMAL_MAJOR0;
	rio_driver->type = TTY_DRIVER_TYPE_SERIAL;
	rio_driver->subtype = SERIAL_TYPE_NORMAL;
	rio_driver->init_termios = tty_std_termios;
	rio_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
	rio_driver->flags = TTY_DRIVER_REAL_RAW;
	tty_set_operations(rio_driver, &rio_ops);

	rio_driver2->owner = THIS_MODULE;
	rio_driver2->driver_name = "specialix_rio";
	rio_driver2->name = "ttySR";
	rio_driver2->major = RIO_NORMAL_MAJOR1;
	rio_driver2->type = TTY_DRIVER_TYPE_SERIAL;
	rio_driver2->subtype = SERIAL_TYPE_NORMAL;
	rio_driver2->init_termios = tty_std_termios;
	rio_driver2->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
	rio_driver2->flags = TTY_DRIVER_REAL_RAW;
	tty_set_operations(rio_driver2, &rio_ops);

	rio_dprintk (RIO_DEBUG_INIT, "set_termios = %p\n", gs_set_termios);

	if ((error = tty_register_driver(rio_driver)))
		goto out2;
	if ((error = tty_register_driver(rio_driver2)))
		goto out3;
	func_exit();
	return 0;
out3:
	tty_unregister_driver(rio_driver);
out2:
	put_tty_driver(rio_driver2);
out1:
	put_tty_driver(rio_driver);
out:
	printk(KERN_ERR "rio: Couldn't register a rio driver, error = %d\n",
	     error);
	return 1;
}


static void * ckmalloc (int size)
{
  void *p;

  p = kmalloc(size, GFP_KERNEL);
  if (p) 
    memset(p, 0, size);
  return p;
}



static int rio_init_datastructures (void)
{
  int i;
  struct Port *port;
  func_enter();

  /* Many drivers statically allocate the maximum number of ports
     There is no reason not to allocate them dynamically. Is there? -- REW */
  /* However, the RIO driver allows users to configure their first
     RTA as the ports numbered 504-511. We therefore need to allocate 
     the whole range. :-(   -- REW */
  
#define RI_SZ   sizeof(struct rio_info)
#define HOST_SZ sizeof(struct Host)
#define PORT_SZ sizeof(struct Port *)
#define TMIO_SZ sizeof(struct termios *)
  rio_dprintk (RIO_DEBUG_INIT, "getting : %d %d %d %d %d bytes\n", 
               RI_SZ, 
               RIO_HOSTS * HOST_SZ,
               RIO_PORTS * PORT_SZ,
               RIO_PORTS * TMIO_SZ,
               RIO_PORTS * TMIO_SZ);
  
  if (!(p                  = ckmalloc (              RI_SZ))) goto free0;
  if (!(p->RIOHosts        = ckmalloc (RIO_HOSTS * HOST_SZ))) goto free1;
  if (!(p->RIOPortp        = ckmalloc (RIO_PORTS * PORT_SZ))) goto free2;
  p->RIOConf = RIOConf;
  rio_dprintk (RIO_DEBUG_INIT, "Got : %p %p %p\n", 
               p, p->RIOHosts, p->RIOPortp);

#if 1
  for (i = 0; i < RIO_PORTS; i++) {
    port = p->RIOPortp[i] = ckmalloc (sizeof (struct Port));
    if (!port) {
      goto free6;
    }
    rio_dprintk (RIO_DEBUG_INIT, "initing port %d (%d)\n", i, port->Mapped);
    port->PortNum = i;
    port->gs.magic = RIO_MAGIC;
    port->gs.close_delay = HZ/2;
    port->gs.closing_wait = 30 * HZ;
    port->gs.rd = &rio_real_driver;
    spin_lock_init(&port->portSem);
    /*
     * Initializing wait queue
     */
    init_waitqueue_head(&port->gs.open_wait);
    init_waitqueue_head(&port->gs.close_wait);
  }
#else
  /* We could postpone initializing them to when they are configured. */
#endif


  
  if (rio_debug & RIO_DEBUG_INIT) {
    my_hd (&rio_real_driver, sizeof (rio_real_driver));
  }

  
  func_exit();
  return 0;

 free6:for (i--;i>=0;i--)
        kfree (p->RIOPortp[i]);
/*free5:
 free4:
 free3:*/kfree (p->RIOPortp);
 free2:kfree (p->RIOHosts);
 free1:
  rio_dprintk (RIO_DEBUG_INIT, "Not enough memory! %p %p %p\n", 
        	       p, p->RIOHosts, p->RIOPortp);
  kfree(p);        	      
 free0:
  return -ENOMEM;
}

static void  __exit rio_release_drivers(void)
{
  func_enter();
  tty_unregister_driver(rio_driver2);
  tty_unregister_driver(rio_driver);
  put_tty_driver(rio_driver2);
  put_tty_driver(rio_driver);
  func_exit();
}


#ifdef CONFIG_PCI
 /* This was written for SX, but applies to RIO too...
    (including bugs....)

    There is another bit besides Bit 17. Turning that bit off
    (on boards shipped with the fix in the eeprom) results in a 
    hang on the next access to the card. 
 */

 /******************************************************** 
 * Setting bit 17 in the CNTRL register of the PLX 9050  * 
 * chip forces a retry on writes while a read is pending.*
 * This is to prevent the card locking up on Intel Xeon  *
 * multiprocessor systems with the NX chipset.    -- NV  *
 ********************************************************/

/* Newer cards are produced with this bit set from the configuration
   EEprom.  As the bit is read/write for the CPU, we can fix it here,
   if we detect that it isn't set correctly. -- REW */

static void fix_rio_pci (struct pci_dev *pdev)
{
  unsigned int hwbase;
  unsigned long rebase;
  unsigned int t;

#define CNTRL_REG_OFFSET        0x50
#define CNTRL_REG_GOODVALUE     0x18260000

  pci_read_config_dword(pdev, PCI_BASE_ADDRESS_0, &hwbase);
  hwbase &= PCI_BASE_ADDRESS_MEM_MASK;
  rebase =  (ulong) ioremap(hwbase, 0x80);
  t = readl (rebase + CNTRL_REG_OFFSET);
  if (t != CNTRL_REG_GOODVALUE) {
    printk (KERN_DEBUG "rio: performing cntrl reg fix: %08x -> %08x\n", 
            t, CNTRL_REG_GOODVALUE); 
    writel (CNTRL_REG_GOODVALUE, rebase + CNTRL_REG_OFFSET);  
  }
  iounmap((char*) rebase);
}
#endif


static int __init rio_init(void) 
{
  int found = 0;
  int i;
  struct Host *hp;
  int retval;
  struct vpd_prom *vpdp;
  int okboard;

#ifdef CONFIG_PCI
  struct pci_dev *pdev = NULL;
  unsigned int tint;
  unsigned short tshort;
#endif

  func_enter();
  rio_dprintk (RIO_DEBUG_INIT, "Initing rio module... (rio_debug=%d)\n", 
	       rio_debug);

  if (abs ((long) (&rio_debug) - rio_debug) < 0x10000) {
    printk (KERN_WARNING "rio: rio_debug is an address, instead of a value. "
            "Assuming -1. Was %x/%p.\n", rio_debug, &rio_debug);
    rio_debug=-1;
  }

  if (misc_register(&rio_fw_device) < 0) {
    printk(KERN_ERR "RIO: Unable to register firmware loader driver.\n");
    return -EIO;
  }

  retval = rio_init_datastructures ();
  if (retval < 0) {
    misc_deregister(&rio_fw_device);
    return retval;
  }

#ifdef CONFIG_PCI
    /* First look for the JET devices: */
    while ((pdev = pci_get_device (PCI_VENDOR_ID_SPECIALIX,
                                    PCI_DEVICE_ID_SPECIALIX_SX_XIO_IO8, 
                                    pdev))) {
       if (pci_enable_device(pdev)) continue;

      /* Specialix has a whole bunch of cards with
         0x2000 as the device ID. They say its because
         the standard requires it. Stupid standard. */
      /* It seems that reading a word doesn't work reliably on 2.0.
         Also, reading a non-aligned dword doesn't work. So we read the
         whole dword at 0x2c and extract the word at 0x2e (SUBSYSTEM_ID)
         ourselves */
      /* I don't know why the define doesn't work, constant 0x2c does --REW */ 
      pci_read_config_dword (pdev, 0x2c, &tint);
      tshort = (tint >> 16) & 0xffff;
      rio_dprintk (RIO_DEBUG_PROBE, "Got a specialix card: %x.\n", tint);
      if (tshort != 0x0100) {
        rio_dprintk (RIO_DEBUG_PROBE, "But it's not a RIO card (%d)...\n", 
                    tshort);
        continue;
      }
      rio_dprintk (RIO_DEBUG_PROBE, "cp1\n");

      pci_read_config_dword(pdev, PCI_BASE_ADDRESS_2, &tint);

      hp = &p->RIOHosts[p->RIONumHosts];
      hp->PaddrP =  tint & PCI_BASE_ADDRESS_MEM_MASK;
      hp->Ivec = pdev->irq;
      if (((1 << hp->Ivec) & rio_irqmask) == 0)
              hp->Ivec = 0;
      hp->Caddr = ioremap(p->RIOHosts[p->RIONumHosts].PaddrP, RIO_WINDOW_LEN);
      hp->CardP	= (struct DpRam *) hp->Caddr;
      hp->Type  = RIO_PCI;
      hp->Copy  = rio_pcicopy; 
      hp->Mode  = RIO_PCI_BOOT_FROM_RAM;
      spin_lock_init(&hp->HostLock);
      rio_reset_interrupt (hp);
      rio_start_card_running (hp);

      rio_dprintk (RIO_DEBUG_PROBE, "Going to test it (%p/%p).\n",
                   (void *)p->RIOHosts[p->RIONumHosts].PaddrP,
                   p->RIOHosts[p->RIONumHosts].Caddr);
      if (RIOBoardTest( p->RIOHosts[p->RIONumHosts].PaddrP,
                        p->RIOHosts[p->RIONumHosts].Caddr, 
                        RIO_PCI, 0 ) == RIO_SUCCESS) {
              rio_dprintk (RIO_DEBUG_INIT, "Done RIOBoardTest\n");
              WBYTE(p->RIOHosts[p->RIONumHosts].ResetInt, 0xff);
              p->RIOHosts[p->RIONumHosts].UniqueNum  =
                      ((RBYTE(p->RIOHosts[p->RIONumHosts].Unique[0]) &0xFF)<< 0)|
                      ((RBYTE(p->RIOHosts[p->RIONumHosts].Unique[1]) &0xFF)<< 8)|
                      ((RBYTE(p->RIOHosts[p->RIONumHosts].Unique[2]) &0xFF)<<16)|
                      ((RBYTE(p->RIOHosts[p->RIONumHosts].Unique[3]) &0xFF)<<24);
              rio_dprintk (RIO_DEBUG_PROBE, "Hmm Tested ok, uniqid = %x.\n",
                           p->RIOHosts[p->RIONumHosts].UniqueNum);
              
              fix_rio_pci (pdev);
              p->RIOLastPCISearch = RIO_SUCCESS;
              p->RIONumHosts++;
              found++;
      } else {
              iounmap((char*) (p->RIOHosts[p->RIONumHosts].Caddr));
      }
    }
    
    /* Then look for the older PCI card.... : */

  /* These older PCI cards have problems (only byte-mode access is
     supported), which makes them a bit awkward to support. 
     They also have problems sharing interrupts. Be careful. 
     (The driver now refuses to share interrupts for these
     cards. This should be sufficient).
  */

    /* Then look for the older RIO/PCI devices: */
    while ((pdev = pci_get_device (PCI_VENDOR_ID_SPECIALIX,
                                    PCI_DEVICE_ID_SPECIALIX_RIO, 
                                    pdev))) {
       if (pci_enable_device(pdev)) continue;

#ifdef CONFIG_RIO_OLDPCI
      pci_read_config_dword(pdev, PCI_BASE_ADDRESS_0, &tint);

      hp = &p->RIOHosts[p->RIONumHosts];
      hp->PaddrP =  tint & PCI_BASE_ADDRESS_MEM_MASK;
      hp->Ivec = pdev->irq;
      if (((1 << hp->Ivec) & rio_irqmask) == 0) 
      	hp->Ivec = 0;
      hp->Ivec |= 0x8000; /* Mark as non-sharable */
      hp->Caddr = ioremap(p->RIOHosts[p->RIONumHosts].PaddrP, RIO_WINDOW_LEN);
      hp->CardP	= (struct DpRam *) hp->Caddr;
      hp->Type  = RIO_PCI;
      hp->Copy  = rio_pcicopy;
      hp->Mode  = RIO_PCI_BOOT_FROM_RAM;
      spin_lock_init(&hp->HostLock);

      rio_dprintk (RIO_DEBUG_PROBE, "Ivec: %x\n", hp->Ivec);
      rio_dprintk (RIO_DEBUG_PROBE, "Mode: %x\n", hp->Mode);

      rio_reset_interrupt (hp);
      rio_start_card_running (hp);
       rio_dprintk (RIO_DEBUG_PROBE, "Going to test it (%p/%p).\n",
                   (void *)p->RIOHosts[p->RIONumHosts].PaddrP,
                   p->RIOHosts[p->RIONumHosts].Caddr);
      if (RIOBoardTest( p->RIOHosts[p->RIONumHosts].PaddrP,
                        p->RIOHosts[p->RIONumHosts].Caddr, 
                        RIO_PCI, 0 ) == RIO_SUCCESS) {
        WBYTE(p->RIOHosts[p->RIONumHosts].ResetInt, 0xff);
        p->RIOHosts[p->RIONumHosts].UniqueNum  =
          ((RBYTE(p->RIOHosts[p->RIONumHosts].Unique[0]) &0xFF)<< 0)|
          ((RBYTE(p->RIOHosts[p->RIONumHosts].Unique[1]) &0xFF)<< 8)|
          ((RBYTE(p->RIOHosts[p->RIONumHosts].Unique[2]) &0xFF)<<16)|
          ((RBYTE(p->RIOHosts[p->RIONumHosts].Unique[3]) &0xFF)<<24);
        rio_dprintk (RIO_DEBUG_PROBE, "Hmm Tested ok, uniqid = %x.\n",
                   p->RIOHosts[p->RIONumHosts].UniqueNum);

        p->RIOLastPCISearch = RIO_SUCCESS;
        p->RIONumHosts++;
        found++;
      } else {
        iounmap((char*) (p->RIOHosts[p->RIONumHosts].Caddr));
      }
#else
      printk (KERN_ERR "Found an older RIO PCI card, but the driver is not "
              "compiled to support it.\n");
#endif
    }
#endif /* PCI */

  /* Now probe for ISA cards... */
  for (i=0;i<NR_RIO_ADDRS;i++) {
    hp = &p->RIOHosts[p->RIONumHosts];
    hp->PaddrP = rio_probe_addrs[i];
    /* There was something about the IRQs of these cards. 'Forget what.--REW */
    hp->Ivec = 0;
    hp->Caddr = ioremap(p->RIOHosts[p->RIONumHosts].PaddrP, RIO_WINDOW_LEN);
    hp->CardP = (struct DpRam *) hp->Caddr;
    hp->Type = RIO_AT;
    hp->Copy = rio_pcicopy; /* AT card PCI???? - PVDL
                             * -- YES! this is now a normal copy. Only the 
                             * old PCI card uses the special PCI copy. 
                             * Moreover, the ISA card will work with the 
                             * special PCI copy anyway. -- REW */
    hp->Mode = 0;
    spin_lock_init(&hp->HostLock);

    vpdp = get_VPD_PROM (hp);
    rio_dprintk (RIO_DEBUG_PROBE, "Got VPD ROM\n");
    okboard = 0;
    if ((strncmp (vpdp->identifier, RIO_ISA_IDENT, 16) == 0) ||
        (strncmp (vpdp->identifier, RIO_ISA2_IDENT, 16) == 0) ||
        (strncmp (vpdp->identifier, RIO_ISA3_IDENT, 16) == 0)) {
      /* Board is present... */
      if (RIOBoardTest (hp->PaddrP, 
                        hp->Caddr, RIO_AT, 0) == RIO_SUCCESS) {
        /* ... and feeling fine!!!! */
        rio_dprintk (RIO_DEBUG_PROBE, "Hmm Tested ok, uniqid = %x.\n",
                   p->RIOHosts[p->RIONumHosts].UniqueNum);
        if (RIOAssignAT(p, hp->PaddrP, hp->Caddr, 0)) {        
          rio_dprintk (RIO_DEBUG_PROBE, "Hmm Tested ok, host%d uniqid = %x.\n",
                       p->RIONumHosts, 
                       p->RIOHosts[p->RIONumHosts-1].UniqueNum);
          okboard++;
          found++;
        }
      }

    if (!okboard)
      iounmap ((char*) (hp->Caddr));
    }
  }


  for (i=0;i<p->RIONumHosts;i++) {
    hp = &p->RIOHosts[i];
    if (hp->Ivec) {
      int mode = SA_SHIRQ;
      if (hp->Ivec & 0x8000) {mode = 0; hp->Ivec &= 0x7fff;}
      rio_dprintk (RIO_DEBUG_INIT, "Requesting interrupt hp: %p rio_interrupt: %d Mode: %x\n", hp,hp->Ivec, hp->Mode);
      retval = request_irq (hp->Ivec, rio_interrupt, mode, "rio", hp);
      rio_dprintk (RIO_DEBUG_INIT, "Return value from request_irq: %d\n", retval);
      if (retval) {
              printk(KERN_ERR "rio: Cannot allocate irq %d.\n", hp->Ivec);
              hp->Ivec = 0;
      }
      rio_dprintk (RIO_DEBUG_INIT, "Got irq %d.\n", hp->Ivec);
      if (hp->Ivec != 0){
              rio_dprintk (RIO_DEBUG_INIT, "Enabling interrupts on rio card.\n"); 
              hp->Mode |= RIO_PCI_INT_ENABLE;
      } else
              hp->Mode &= !RIO_PCI_INT_ENABLE;
      rio_dprintk (RIO_DEBUG_INIT, "New Mode: %x\n", hp->Mode);
      rio_start_card_running (hp);
    }
    /* Init the timer "always" to make sure that it can safely be 
       deleted when we unload... */

    init_timer (&hp->timer);
    if (!hp->Ivec) {
      rio_dprintk (RIO_DEBUG_INIT, "Starting polling at %dj intervals.\n", 
                   rio_poll);
      hp->timer.data = i;
      hp->timer.function = rio_pollfunc;
      hp->timer.expires = jiffies + rio_poll;
      add_timer (&hp->timer);
    }
  }

  if (found) {
    rio_dprintk (RIO_DEBUG_INIT, "rio: total of %d boards detected.\n", found);
    rio_init_drivers ();
  } else {
    /* deregister the misc device we created earlier */
    misc_deregister(&rio_fw_device);
  }

  func_exit();
  return found?0:-EIO;
}


static void __exit rio_exit (void)
{
  int i; 
  struct Host *hp;
  
  func_enter();

  for (i=0,hp=p->RIOHosts;i<p->RIONumHosts;i++, hp++) {
    RIOHostReset (hp->Type, hp->CardP, hp->Slot);
    if (hp->Ivec) {
      free_irq (hp->Ivec, hp);
      rio_dprintk (RIO_DEBUG_INIT, "freed irq %d.\n", hp->Ivec);
    }
    /* It is safe/allowed to del_timer a non-active timer */
    del_timer (&hp->timer);
  }

  if (misc_deregister(&rio_fw_device) < 0) {
    printk (KERN_INFO "rio: couldn't deregister control-device\n");
  }


  rio_dprintk (RIO_DEBUG_CLEANUP, "Cleaning up drivers\n");

  rio_release_drivers ();

  /* Release dynamically allocated memory */
  kfree (p->RIOPortp);
  kfree (p->RIOHosts);
  kfree (p);

  func_exit();
}

module_init(rio_init);
module_exit(rio_exit);

/*
 * Anybody who knows why this doesn't work for me, please tell me -- REW.
 * Snatched from scsi.c (fixed one spelling error):
 * Overrides for Emacs so that we follow Linus' tabbing style.
 * Emacs will notice this stuff at the end of the file and automatically
 * adjust the settings for this buffer only.  This must remain at the end
 * of the file.
 * ---------------------------------------------------------------------------
 * Local Variables:
 * c-indent-level: 4
 * c-brace-imaginary-offset: 0
 * c-brace-offset: -4
 * c-argdecl-indent: 4
 * c-label-offset: -4
 * c-continued-statement-offset: 4
 * c-continued-brace-offset: 0
 * indent-tabs-mode: nil
 * tab-width: 8
 * End:
 */