f66620ad8e7c998f89c74084cffec895b78c463f
[linux-2.6.git] / drivers / isdn / hisax / gazel.c
1 /* $Id: gazel.c,v 2.19.2.4 2004/01/14 16:04:48 keil Exp $
2  *
3  * low level stuff for Gazel isdn cards
4  *
5  * Author       BeWan Systems
6  *              based on source code from Karsten Keil
7  * Copyright    by BeWan Systems
8  * 
9  * This software may be used and distributed according to the terms
10  * of the GNU General Public License, incorporated herein by reference.
11  *
12  */
13
14 #include <linux/init.h>
15 #include "hisax.h"
16 #include "isac.h"
17 #include "hscx.h"
18 #include "isdnl1.h"
19 #include "ipac.h"
20 #include <linux/pci.h>
21
22 extern const char *CardType[];
23 static const char *gazel_revision = "$Revision: 2.19.2.4 $";
24
25 #define R647      1
26 #define R685      2
27 #define R753      3
28 #define R742      4
29
30 #define PLX_CNTRL    0x50       /* registre de controle PLX */
31 #define RESET_GAZEL  0x4
32 #define RESET_9050   0x40000000
33 #define PLX_INCSR    0x4C       /* registre d'IT du 9050 */
34 #define INT_ISAC_EN  0x8        /* 1 = enable IT isac */
35 #define INT_ISAC     0x20       /* 1 = IT isac en cours */
36 #define INT_HSCX_EN  0x1        /* 1 = enable IT hscx */
37 #define INT_HSCX     0x4        /* 1 = IT hscx en cours */
38 #define INT_PCI_EN   0x40       /* 1 = enable IT PCI */
39 #define INT_IPAC_EN  0x3        /* enable IT ipac */
40
41
42 #define byteout(addr,val) outb(val,addr)
43 #define bytein(addr) inb(addr)
44
45 static inline u_char
46 readreg(unsigned int adr, u_short off)
47 {
48         return bytein(adr + off);
49 }
50
51 static inline void
52 writereg(unsigned int adr, u_short off, u_char data)
53 {
54         byteout(adr + off, data);
55 }
56
57
58 static inline void
59 read_fifo(unsigned int adr, u_char * data, int size)
60 {
61         insb(adr, data, size);
62 }
63
64 static void
65 write_fifo(unsigned int adr, u_char * data, int size)
66 {
67         outsb(adr, data, size);
68 }
69
70 static inline u_char
71 readreg_ipac(unsigned int adr, u_short off)
72 {
73         register u_char ret;
74
75         byteout(adr, off);
76         ret = bytein(adr + 4);
77         return ret;
78 }
79
80 static inline void
81 writereg_ipac(unsigned int adr, u_short off, u_char data)
82 {
83         byteout(adr, off);
84         byteout(adr + 4, data);
85 }
86
87
88 static inline void
89 read_fifo_ipac(unsigned int adr, u_short off, u_char * data, int size)
90 {
91         byteout(adr, off);
92         insb(adr + 4, data, size);
93 }
94
95 static void
96 write_fifo_ipac(unsigned int adr, u_short off, u_char * data, int size)
97 {
98         byteout(adr, off);
99         outsb(adr + 4, data, size);
100 }
101
102 /* Interface functions */
103
104 static u_char
105 ReadISAC(struct IsdnCardState *cs, u_char offset)
106 {
107         u_short off2 = offset;
108
109         switch (cs->subtyp) {
110                 case R647:
111                         off2 = ((off2 << 8 & 0xf000) | (off2 & 0xf));
112                 case R685:
113                         return (readreg(cs->hw.gazel.isac, off2));
114                 case R753:
115                 case R742:
116                         return (readreg_ipac(cs->hw.gazel.ipac, 0x80 + off2));
117         }
118         return 0;
119 }
120
121 static void
122 WriteISAC(struct IsdnCardState *cs, u_char offset, u_char value)
123 {
124         u_short off2 = offset;
125
126         switch (cs->subtyp) {
127                 case R647:
128                         off2 = ((off2 << 8 & 0xf000) | (off2 & 0xf));
129                 case R685:
130                         writereg(cs->hw.gazel.isac, off2, value);
131                         break;
132                 case R753:
133                 case R742:
134                         writereg_ipac(cs->hw.gazel.ipac, 0x80 + off2, value);
135                         break;
136         }
137 }
138
139 static void
140 ReadISACfifo(struct IsdnCardState *cs, u_char * data, int size)
141 {
142         switch (cs->subtyp) {
143                 case R647:
144                 case R685:
145                         read_fifo(cs->hw.gazel.isacfifo, data, size);
146                         break;
147                 case R753:
148                 case R742:
149                         read_fifo_ipac(cs->hw.gazel.ipac, 0x80, data, size);
150                         break;
151         }
152 }
153
154 static void
155 WriteISACfifo(struct IsdnCardState *cs, u_char * data, int size)
156 {
157         switch (cs->subtyp) {
158                 case R647:
159                 case R685:
160                         write_fifo(cs->hw.gazel.isacfifo, data, size);
161                         break;
162                 case R753:
163                 case R742:
164                         write_fifo_ipac(cs->hw.gazel.ipac, 0x80, data, size);
165                         break;
166         }
167 }
168
169 static void
170 ReadHSCXfifo(struct IsdnCardState *cs, int hscx, u_char * data, int size)
171 {
172         switch (cs->subtyp) {
173                 case R647:
174                 case R685:
175                         read_fifo(cs->hw.gazel.hscxfifo[hscx], data, size);
176                         break;
177                 case R753:
178                 case R742:
179                         read_fifo_ipac(cs->hw.gazel.ipac, hscx * 0x40, data, size);
180                         break;
181         }
182 }
183
184 static void
185 WriteHSCXfifo(struct IsdnCardState *cs, int hscx, u_char * data, int size)
186 {
187         switch (cs->subtyp) {
188                 case R647:
189                 case R685:
190                         write_fifo(cs->hw.gazel.hscxfifo[hscx], data, size);
191                         break;
192                 case R753:
193                 case R742:
194                         write_fifo_ipac(cs->hw.gazel.ipac, hscx * 0x40, data, size);
195                         break;
196         }
197 }
198
199 static u_char
200 ReadHSCX(struct IsdnCardState *cs, int hscx, u_char offset)
201 {
202         u_short off2 = offset;
203
204         switch (cs->subtyp) {
205                 case R647:
206                         off2 = ((off2 << 8 & 0xf000) | (off2 & 0xf));
207                 case R685:
208                         return (readreg(cs->hw.gazel.hscx[hscx], off2));
209                 case R753:
210                 case R742:
211                         return (readreg_ipac(cs->hw.gazel.ipac, hscx * 0x40 + off2));
212         }
213         return 0;
214 }
215
216 static void
217 WriteHSCX(struct IsdnCardState *cs, int hscx, u_char offset, u_char value)
218 {
219         u_short off2 = offset;
220
221         switch (cs->subtyp) {
222                 case R647:
223                         off2 = ((off2 << 8 & 0xf000) | (off2 & 0xf));
224                 case R685:
225                         writereg(cs->hw.gazel.hscx[hscx], off2, value);
226                         break;
227                 case R753:
228                 case R742:
229                         writereg_ipac(cs->hw.gazel.ipac, hscx * 0x40 + off2, value);
230                         break;
231         }
232 }
233
234 /*
235  * fast interrupt HSCX stuff goes here
236  */
237
238 #define READHSCX(cs, nr, reg) ReadHSCX(cs, nr, reg)
239 #define WRITEHSCX(cs, nr, reg, data) WriteHSCX(cs, nr, reg, data)
240 #define READHSCXFIFO(cs, nr, ptr, cnt) ReadHSCXfifo(cs, nr, ptr, cnt)
241 #define WRITEHSCXFIFO(cs, nr, ptr, cnt) WriteHSCXfifo(cs, nr, ptr, cnt)
242
243 #include "hscx_irq.c"
244
245 static irqreturn_t
246 gazel_interrupt(int intno, void *dev_id)
247 {
248 #define MAXCOUNT 5
249         struct IsdnCardState *cs = dev_id;
250         u_char valisac, valhscx;
251         int count = 0;
252         u_long flags;
253
254         spin_lock_irqsave(&cs->lock, flags);
255         do {
256                 valhscx = ReadHSCX(cs, 1, HSCX_ISTA);
257                 if (valhscx)
258                         hscx_int_main(cs, valhscx);
259                 valisac = ReadISAC(cs, ISAC_ISTA);
260                 if (valisac)
261                         isac_interrupt(cs, valisac);
262                 count++;
263         } while ((valhscx || valisac) && (count < MAXCOUNT));
264
265         WriteHSCX(cs, 0, HSCX_MASK, 0xFF);
266         WriteHSCX(cs, 1, HSCX_MASK, 0xFF);
267         WriteISAC(cs, ISAC_MASK, 0xFF);
268         WriteISAC(cs, ISAC_MASK, 0x0);
269         WriteHSCX(cs, 0, HSCX_MASK, 0x0);
270         WriteHSCX(cs, 1, HSCX_MASK, 0x0);
271         spin_unlock_irqrestore(&cs->lock, flags);
272         return IRQ_HANDLED;
273 }
274
275
276 static irqreturn_t
277 gazel_interrupt_ipac(int intno, void *dev_id)
278 {
279         struct IsdnCardState *cs = dev_id;
280         u_char ista, val;
281         int count = 0;
282         u_long flags;
283         
284         spin_lock_irqsave(&cs->lock, flags);
285         ista = ReadISAC(cs, IPAC_ISTA - 0x80);
286         do {
287                 if (ista & 0x0f) {
288                         val = ReadHSCX(cs, 1, HSCX_ISTA);
289                         if (ista & 0x01)
290                                 val |= 0x01;
291                         if (ista & 0x04)
292                                 val |= 0x02;
293                         if (ista & 0x08)
294                                 val |= 0x04;
295                         if (val) {
296                                 hscx_int_main(cs, val);
297                         }
298                 }
299                 if (ista & 0x20) {
300                         val = 0xfe & ReadISAC(cs, ISAC_ISTA);
301                         if (val) {
302                                 isac_interrupt(cs, val);
303                         }
304                 }
305                 if (ista & 0x10) {
306                         val = 0x01;
307                         isac_interrupt(cs, val);
308                 }
309                 ista = ReadISAC(cs, IPAC_ISTA - 0x80);
310                 count++;
311         }
312         while ((ista & 0x3f) && (count < MAXCOUNT));
313
314         WriteISAC(cs, IPAC_MASK - 0x80, 0xFF);
315         WriteISAC(cs, IPAC_MASK - 0x80, 0xC0);
316         spin_unlock_irqrestore(&cs->lock, flags);
317         return IRQ_HANDLED;
318 }
319
320 static void
321 release_io_gazel(struct IsdnCardState *cs)
322 {
323         unsigned int i;
324
325         switch (cs->subtyp) {
326                 case R647:
327                         for (i = 0x0000; i < 0xC000; i += 0x1000)
328                                 release_region(i + cs->hw.gazel.hscx[0], 16);
329                         release_region(0xC000 + cs->hw.gazel.hscx[0], 1);
330                         break;
331
332                 case R685:
333                         release_region(cs->hw.gazel.hscx[0], 0x100);
334                         release_region(cs->hw.gazel.cfg_reg, 0x80);
335                         break;
336
337                 case R753:
338                         release_region(cs->hw.gazel.ipac, 0x8);
339                         release_region(cs->hw.gazel.cfg_reg, 0x80);
340                         break;
341
342                 case R742:
343                         release_region(cs->hw.gazel.ipac, 8);
344                         break;
345         }
346 }
347
348 static int
349 reset_gazel(struct IsdnCardState *cs)
350 {
351         unsigned long plxcntrl, addr = cs->hw.gazel.cfg_reg;
352
353         switch (cs->subtyp) {
354                 case R647:
355                         writereg(addr, 0, 0);
356                         HZDELAY(10);
357                         writereg(addr, 0, 1);
358                         HZDELAY(2);
359                         break;
360                 case R685:
361                         plxcntrl = inl(addr + PLX_CNTRL);
362                         plxcntrl |= (RESET_9050 + RESET_GAZEL);
363                         outl(plxcntrl, addr + PLX_CNTRL);
364                         plxcntrl &= ~(RESET_9050 + RESET_GAZEL);
365                         HZDELAY(4);
366                         outl(plxcntrl, addr + PLX_CNTRL);
367                         HZDELAY(10);
368                         outb(INT_ISAC_EN + INT_HSCX_EN + INT_PCI_EN, addr + PLX_INCSR);
369                         break;
370                 case R753:
371                         plxcntrl = inl(addr + PLX_CNTRL);
372                         plxcntrl |= (RESET_9050 + RESET_GAZEL);
373                         outl(plxcntrl, addr + PLX_CNTRL);
374                         plxcntrl &= ~(RESET_9050 + RESET_GAZEL);
375                         WriteISAC(cs, IPAC_POTA2 - 0x80, 0x20);
376                         HZDELAY(4);
377                         outl(plxcntrl, addr + PLX_CNTRL);
378                         HZDELAY(10);
379                         WriteISAC(cs, IPAC_POTA2 - 0x80, 0x00);
380                         WriteISAC(cs, IPAC_ACFG - 0x80, 0xff);
381                         WriteISAC(cs, IPAC_AOE - 0x80, 0x0);
382                         WriteISAC(cs, IPAC_MASK - 0x80, 0xff);
383                         WriteISAC(cs, IPAC_CONF - 0x80, 0x1);
384                         outb(INT_IPAC_EN + INT_PCI_EN, addr + PLX_INCSR);
385                         WriteISAC(cs, IPAC_MASK - 0x80, 0xc0);
386                         break;
387                 case R742:
388                         WriteISAC(cs, IPAC_POTA2 - 0x80, 0x20);
389                         HZDELAY(4);
390                         WriteISAC(cs, IPAC_POTA2 - 0x80, 0x00);
391                         WriteISAC(cs, IPAC_ACFG - 0x80, 0xff);
392                         WriteISAC(cs, IPAC_AOE - 0x80, 0x0);
393                         WriteISAC(cs, IPAC_MASK - 0x80, 0xff);
394                         WriteISAC(cs, IPAC_CONF - 0x80, 0x1);
395                         WriteISAC(cs, IPAC_MASK - 0x80, 0xc0);
396                         break;
397         }
398         return (0);
399 }
400
401 static int
402 Gazel_card_msg(struct IsdnCardState *cs, int mt, void *arg)
403 {
404         u_long flags;
405
406         switch (mt) {
407                 case CARD_RESET:
408                         spin_lock_irqsave(&cs->lock, flags);
409                         reset_gazel(cs);
410                         spin_unlock_irqrestore(&cs->lock, flags);
411                         return (0);
412                 case CARD_RELEASE:
413                         release_io_gazel(cs);
414                         return (0);
415                 case CARD_INIT:
416                         spin_lock_irqsave(&cs->lock, flags);
417                         inithscxisac(cs, 1);
418                         if ((cs->subtyp==R647)||(cs->subtyp==R685)) {
419                                 int i;
420                                 for (i=0;i<(2+MAX_WAITING_CALLS);i++) {
421                                         cs->bcs[i].hw.hscx.tsaxr0 = 0x1f;
422                                         cs->bcs[i].hw.hscx.tsaxr1 = 0x23;
423                                 }
424                         }
425                         spin_unlock_irqrestore(&cs->lock, flags);
426                         return (0);
427                 case CARD_TEST:
428                         return (0);
429         }
430         return (0);
431 }
432
433 static int
434 reserve_regions(struct IsdnCard *card, struct IsdnCardState *cs)
435 {
436         unsigned int i, j, base = 0, adr = 0, len = 0;
437
438         switch (cs->subtyp) {
439                 case R647:
440                         base = cs->hw.gazel.hscx[0];
441                         if (!request_region(adr = (0xC000 + base), len = 1, "gazel"))
442                                 goto error;
443                         for (i = 0x0000; i < 0xC000; i += 0x1000) {
444                                 if (!request_region(adr = (i + base), len = 16, "gazel"))
445                                         goto error;
446                         }
447                         if (i != 0xC000) {
448                                 for (j = 0; j < i; j+= 0x1000)
449                                         release_region(j + base, 16);
450                                 release_region(0xC000 + base, 1);
451                                 goto error;
452                         }
453                         break;
454
455                 case R685:
456                         if (!request_region(adr = cs->hw.gazel.hscx[0], len = 0x100, "gazel"))
457                                 goto error;
458                         if (!request_region(adr = cs->hw.gazel.cfg_reg, len = 0x80, "gazel")) {
459                                 release_region(cs->hw.gazel.hscx[0],0x100);
460                                 goto error;
461                         }
462                         break;
463
464                 case R753:
465                         if (!request_region(adr = cs->hw.gazel.ipac, len = 0x8, "gazel"))
466                                 goto error;
467                         if (!request_region(adr = cs->hw.gazel.cfg_reg, len = 0x80, "gazel")) {
468                                 release_region(cs->hw.gazel.ipac, 8);
469                                 goto error;
470                         }
471                         break;
472
473                 case R742:
474                         if (!request_region(adr = cs->hw.gazel.ipac, len = 0x8, "gazel"))
475                                 goto error;
476                         break;
477         }
478
479         return 0;
480
481       error:
482         printk(KERN_WARNING "Gazel: %s io ports 0x%x-0x%x already in use\n",
483                CardType[cs->typ], adr, adr + len);
484         return 1;
485 }
486
487 static int __devinit
488 setup_gazelisa(struct IsdnCard *card, struct IsdnCardState *cs)
489 {
490         printk(KERN_INFO "Gazel: ISA PnP card automatic recognition\n");
491         // we got an irq parameter, assume it is an ISA card
492         // R742 decodes address even in not started...
493         // R647 returns FF if not present or not started
494         // eventually needs improvment
495         if (readreg_ipac(card->para[1], IPAC_ID) == 1)
496                 cs->subtyp = R742;
497         else
498                 cs->subtyp = R647;
499
500         setup_isac(cs);
501         cs->hw.gazel.cfg_reg = card->para[1] + 0xC000;
502         cs->hw.gazel.ipac = card->para[1];
503         cs->hw.gazel.isac = card->para[1] + 0x8000;
504         cs->hw.gazel.hscx[0] = card->para[1];
505         cs->hw.gazel.hscx[1] = card->para[1] + 0x4000;
506         cs->irq = card->para[0];
507         cs->hw.gazel.isacfifo = cs->hw.gazel.isac;
508         cs->hw.gazel.hscxfifo[0] = cs->hw.gazel.hscx[0];
509         cs->hw.gazel.hscxfifo[1] = cs->hw.gazel.hscx[1];
510
511         switch (cs->subtyp) {
512                 case R647:
513                         printk(KERN_INFO "Gazel: Card ISA R647/R648 found\n");
514                         cs->dc.isac.adf2 = 0x87;
515                         printk(KERN_INFO
516                                 "Gazel: config irq:%d isac:0x%X  cfg:0x%X\n",
517                                 cs->irq, cs->hw.gazel.isac, cs->hw.gazel.cfg_reg);
518                         printk(KERN_INFO
519                                 "Gazel: hscx A:0x%X  hscx B:0x%X\n",
520                                 cs->hw.gazel.hscx[0], cs->hw.gazel.hscx[1]);
521
522                         break;
523                 case R742:
524                         printk(KERN_INFO "Gazel: Card ISA R742 found\n");
525                         test_and_set_bit(HW_IPAC, &cs->HW_Flags);
526                         printk(KERN_INFO
527                                "Gazel: config irq:%d ipac:0x%X\n",
528                                cs->irq, cs->hw.gazel.ipac);
529                         break;
530         }
531
532         return (0);
533 }
534
535 #ifdef CONFIG_PCI_LEGACY
536 static struct pci_dev *dev_tel __devinitdata = NULL;
537
538 static int __devinit
539 setup_gazelpci(struct IsdnCardState *cs)
540 {
541         u_int pci_ioaddr0 = 0, pci_ioaddr1 = 0;
542         u_char pci_irq = 0, found;
543         u_int nbseek, seekcard;
544
545         printk(KERN_WARNING "Gazel: PCI card automatic recognition\n");
546
547         found = 0;
548         seekcard = PCI_DEVICE_ID_PLX_R685;
549         for (nbseek = 0; nbseek < 4; nbseek++) {
550                 if ((dev_tel = pci_find_device(PCI_VENDOR_ID_PLX,
551                                         seekcard, dev_tel))) {
552                         if (pci_enable_device(dev_tel))
553                                 return 1;
554                         pci_irq = dev_tel->irq;
555                         pci_ioaddr0 = pci_resource_start(dev_tel, 1);
556                         pci_ioaddr1 = pci_resource_start(dev_tel, 2);
557                         found = 1;
558                 }
559                 if (found)
560                         break;
561                 else {
562                         switch (seekcard) {
563                                 case PCI_DEVICE_ID_PLX_R685:
564                                         seekcard = PCI_DEVICE_ID_PLX_R753;
565                                         break;
566                                 case PCI_DEVICE_ID_PLX_R753:
567                                         seekcard = PCI_DEVICE_ID_PLX_DJINN_ITOO;
568                                         break;
569                                 case PCI_DEVICE_ID_PLX_DJINN_ITOO:
570                                         seekcard = PCI_DEVICE_ID_PLX_OLITEC;
571                                         break;
572                         }
573                 }
574         }
575         if (!found) {
576                 printk(KERN_WARNING "Gazel: No PCI card found\n");
577                 return (1);
578         }
579         if (!pci_irq) {
580                 printk(KERN_WARNING "Gazel: No IRQ for PCI card found\n");
581                 return 1;
582         }
583         cs->hw.gazel.pciaddr[0] = pci_ioaddr0;
584         cs->hw.gazel.pciaddr[1] = pci_ioaddr1;
585         setup_isac(cs);
586         pci_ioaddr1 &= 0xfffe;
587         cs->hw.gazel.cfg_reg = pci_ioaddr0 & 0xfffe;
588         cs->hw.gazel.ipac = pci_ioaddr1;
589         cs->hw.gazel.isac = pci_ioaddr1 + 0x80;
590         cs->hw.gazel.hscx[0] = pci_ioaddr1;
591         cs->hw.gazel.hscx[1] = pci_ioaddr1 + 0x40;
592         cs->hw.gazel.isacfifo = cs->hw.gazel.isac;
593         cs->hw.gazel.hscxfifo[0] = cs->hw.gazel.hscx[0];
594         cs->hw.gazel.hscxfifo[1] = cs->hw.gazel.hscx[1];
595         cs->irq = pci_irq;
596         cs->irq_flags |= IRQF_SHARED;
597
598         switch (seekcard) {
599                 case PCI_DEVICE_ID_PLX_R685:
600                         printk(KERN_INFO "Gazel: Card PCI R685 found\n");
601                         cs->subtyp = R685;
602                         cs->dc.isac.adf2 = 0x87;
603                         printk(KERN_INFO
604                             "Gazel: config irq:%d isac:0x%X  cfg:0x%X\n",
605                         cs->irq, cs->hw.gazel.isac, cs->hw.gazel.cfg_reg);
606                         printk(KERN_INFO
607                                "Gazel: hscx A:0x%X  hscx B:0x%X\n",
608                              cs->hw.gazel.hscx[0], cs->hw.gazel.hscx[1]);
609                         break;
610                 case PCI_DEVICE_ID_PLX_R753:
611                 case PCI_DEVICE_ID_PLX_DJINN_ITOO:
612                 case PCI_DEVICE_ID_PLX_OLITEC:
613                         printk(KERN_INFO "Gazel: Card PCI R753 found\n");
614                         cs->subtyp = R753;
615                         test_and_set_bit(HW_IPAC, &cs->HW_Flags);
616                         printk(KERN_INFO
617                             "Gazel: config irq:%d ipac:0x%X  cfg:0x%X\n",
618                         cs->irq, cs->hw.gazel.ipac, cs->hw.gazel.cfg_reg);
619                         break;
620         }
621
622         return (0);
623 }
624 #endif /* CONFIG_PCI_LEGACY */
625
626 int __devinit
627 setup_gazel(struct IsdnCard *card)
628 {
629         struct IsdnCardState *cs = card->cs;
630         char tmp[64];
631         u_char val;
632
633         strcpy(tmp, gazel_revision);
634         printk(KERN_INFO "Gazel: Driver Revision %s\n", HiSax_getrev(tmp));
635
636         if (cs->typ != ISDN_CTYPE_GAZEL)
637                 return (0);
638
639         if (card->para[0]) {
640                 if (setup_gazelisa(card, cs))
641                         return (0);
642         } else {
643
644 #ifdef CONFIG_PCI_LEGACY
645                 if (setup_gazelpci(cs))
646                         return (0);
647 #else
648                 printk(KERN_WARNING "Gazel: Card PCI requested and NO_PCI_BIOS, unable to config\n");
649                 return (0);
650 #endif                          /* CONFIG_PCI */
651         }
652
653         if (reserve_regions(card, cs)) {
654                 return (0);
655         }
656         if (reset_gazel(cs)) {
657                 printk(KERN_WARNING "Gazel: wrong IRQ\n");
658                 release_io_gazel(cs);
659                 return (0);
660         }
661         cs->readisac = &ReadISAC;
662         cs->writeisac = &WriteISAC;
663         cs->readisacfifo = &ReadISACfifo;
664         cs->writeisacfifo = &WriteISACfifo;
665         cs->BC_Read_Reg = &ReadHSCX;
666         cs->BC_Write_Reg = &WriteHSCX;
667         cs->BC_Send_Data = &hscx_fill_fifo;
668         cs->cardmsg = &Gazel_card_msg;
669
670         switch (cs->subtyp) {
671                 case R647:
672                 case R685:
673                         cs->irq_func = &gazel_interrupt;
674                         ISACVersion(cs, "Gazel:");
675                         if (HscxVersion(cs, "Gazel:")) {
676                                 printk(KERN_WARNING
677                                        "Gazel: wrong HSCX versions check IO address\n");
678                                 release_io_gazel(cs);
679                                 return (0);
680                         }
681                         break;
682                 case R742:
683                 case R753:
684                         cs->irq_func = &gazel_interrupt_ipac;
685                         val = ReadISAC(cs, IPAC_ID - 0x80);
686                         printk(KERN_INFO "Gazel: IPAC version %x\n", val);
687                         break;
688         }
689
690         return (1);
691 }