GNU Linux-libre 4.19.286-gnu1
[releases.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 static const char *gazel_revision = "$Revision: 2.19.2.4 $";
23
24 #define R647      1
25 #define R685      2
26 #define R753      3
27 #define R742      4
28
29 #define PLX_CNTRL    0x50       /* registre de controle PLX */
30 #define RESET_GAZEL  0x4
31 #define RESET_9050   0x40000000
32 #define PLX_INCSR    0x4C       /* registre d'IT du 9050 */
33 #define INT_ISAC_EN  0x8        /* 1 = enable IT isac */
34 #define INT_ISAC     0x20       /* 1 = IT isac en cours */
35 #define INT_HSCX_EN  0x1        /* 1 = enable IT hscx */
36 #define INT_HSCX     0x4        /* 1 = IT hscx en cours */
37 #define INT_PCI_EN   0x40       /* 1 = enable IT PCI */
38 #define INT_IPAC_EN  0x3        /* enable IT ipac */
39
40
41 #define byteout(addr, val) outb(val, addr)
42 #define bytein(addr) inb(addr)
43
44 static inline u_char
45 readreg(unsigned int adr, u_short off)
46 {
47         return bytein(adr + off);
48 }
49
50 static inline void
51 writereg(unsigned int adr, u_short off, u_char data)
52 {
53         byteout(adr + off, data);
54 }
55
56
57 static inline void
58 read_fifo(unsigned int adr, u_char *data, int size)
59 {
60         insb(adr, data, size);
61 }
62
63 static void
64 write_fifo(unsigned int adr, u_char *data, int size)
65 {
66         outsb(adr, data, size);
67 }
68
69 static inline u_char
70 readreg_ipac(unsigned int adr, u_short off)
71 {
72         register u_char ret;
73
74         byteout(adr, off);
75         ret = bytein(adr + 4);
76         return ret;
77 }
78
79 static inline void
80 writereg_ipac(unsigned int adr, u_short off, u_char data)
81 {
82         byteout(adr, off);
83         byteout(adr + 4, data);
84 }
85
86
87 static inline void
88 read_fifo_ipac(unsigned int adr, u_short off, u_char *data, int size)
89 {
90         byteout(adr, off);
91         insb(adr + 4, data, size);
92 }
93
94 static void
95 write_fifo_ipac(unsigned int adr, u_short off, u_char *data, int size)
96 {
97         byteout(adr, off);
98         outsb(adr + 4, data, size);
99 }
100
101 /* Interface functions */
102
103 static u_char
104 ReadISAC(struct IsdnCardState *cs, u_char offset)
105 {
106         u_short off2 = offset;
107
108         switch (cs->subtyp) {
109         case R647:
110                 off2 = ((off2 << 8 & 0xf000) | (off2 & 0xf));
111                 /* fall through */
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                 /* fall through */
130         case R685:
131                 writereg(cs->hw.gazel.isac, off2, value);
132                 break;
133         case R753:
134         case R742:
135                 writereg_ipac(cs->hw.gazel.ipac, 0x80 + off2, value);
136                 break;
137         }
138 }
139
140 static void
141 ReadISACfifo(struct IsdnCardState *cs, u_char *data, int size)
142 {
143         switch (cs->subtyp) {
144         case R647:
145         case R685:
146                 read_fifo(cs->hw.gazel.isacfifo, data, size);
147                 break;
148         case R753:
149         case R742:
150                 read_fifo_ipac(cs->hw.gazel.ipac, 0x80, data, size);
151                 break;
152         }
153 }
154
155 static void
156 WriteISACfifo(struct IsdnCardState *cs, u_char *data, int size)
157 {
158         switch (cs->subtyp) {
159         case R647:
160         case R685:
161                 write_fifo(cs->hw.gazel.isacfifo, data, size);
162                 break;
163         case R753:
164         case R742:
165                 write_fifo_ipac(cs->hw.gazel.ipac, 0x80, data, size);
166                 break;
167         }
168 }
169
170 static void
171 ReadHSCXfifo(struct IsdnCardState *cs, int hscx, u_char *data, int size)
172 {
173         switch (cs->subtyp) {
174         case R647:
175         case R685:
176                 read_fifo(cs->hw.gazel.hscxfifo[hscx], data, size);
177                 break;
178         case R753:
179         case R742:
180                 read_fifo_ipac(cs->hw.gazel.ipac, hscx * 0x40, data, size);
181                 break;
182         }
183 }
184
185 static void
186 WriteHSCXfifo(struct IsdnCardState *cs, int hscx, u_char *data, int size)
187 {
188         switch (cs->subtyp) {
189         case R647:
190         case R685:
191                 write_fifo(cs->hw.gazel.hscxfifo[hscx], data, size);
192                 break;
193         case R753:
194         case R742:
195                 write_fifo_ipac(cs->hw.gazel.ipac, hscx * 0x40, data, size);
196                 break;
197         }
198 }
199
200 static u_char
201 ReadHSCX(struct IsdnCardState *cs, int hscx, u_char offset)
202 {
203         u_short off2 = offset;
204
205         switch (cs->subtyp) {
206         case R647:
207                 off2 = ((off2 << 8 & 0xf000) | (off2 & 0xf));
208                 /* fall through */
209         case R685:
210                 return (readreg(cs->hw.gazel.hscx[hscx], off2));
211         case R753:
212         case R742:
213                 return (readreg_ipac(cs->hw.gazel.ipac, hscx * 0x40 + off2));
214         }
215         return 0;
216 }
217
218 static void
219 WriteHSCX(struct IsdnCardState *cs, int hscx, u_char offset, u_char value)
220 {
221         u_short off2 = offset;
222
223         switch (cs->subtyp) {
224         case R647:
225                 off2 = ((off2 << 8 & 0xf000) | (off2 & 0xf));
226                 /* fall through */
227         case R685:
228                 writereg(cs->hw.gazel.hscx[hscx], off2, value);
229                 break;
230         case R753:
231         case R742:
232                 writereg_ipac(cs->hw.gazel.ipac, hscx * 0x40 + off2, value);
233                 break;
234         }
235 }
236
237 /*
238  * fast interrupt HSCX stuff goes here
239  */
240
241 #define READHSCX(cs, nr, reg) ReadHSCX(cs, nr, reg)
242 #define WRITEHSCX(cs, nr, reg, data) WriteHSCX(cs, nr, reg, data)
243 #define READHSCXFIFO(cs, nr, ptr, cnt) ReadHSCXfifo(cs, nr, ptr, cnt)
244 #define WRITEHSCXFIFO(cs, nr, ptr, cnt) WriteHSCXfifo(cs, nr, ptr, cnt)
245
246 #include "hscx_irq.c"
247
248 static irqreturn_t
249 gazel_interrupt(int intno, void *dev_id)
250 {
251 #define MAXCOUNT 5
252         struct IsdnCardState *cs = dev_id;
253         u_char valisac, valhscx;
254         int count = 0;
255         u_long flags;
256
257         spin_lock_irqsave(&cs->lock, flags);
258         do {
259                 valhscx = ReadHSCX(cs, 1, HSCX_ISTA);
260                 if (valhscx)
261                         hscx_int_main(cs, valhscx);
262                 valisac = ReadISAC(cs, ISAC_ISTA);
263                 if (valisac)
264                         isac_interrupt(cs, valisac);
265                 count++;
266         } while ((valhscx || valisac) && (count < MAXCOUNT));
267
268         WriteHSCX(cs, 0, HSCX_MASK, 0xFF);
269         WriteHSCX(cs, 1, HSCX_MASK, 0xFF);
270         WriteISAC(cs, ISAC_MASK, 0xFF);
271         WriteISAC(cs, ISAC_MASK, 0x0);
272         WriteHSCX(cs, 0, HSCX_MASK, 0x0);
273         WriteHSCX(cs, 1, HSCX_MASK, 0x0);
274         spin_unlock_irqrestore(&cs->lock, flags);
275         return IRQ_HANDLED;
276 }
277
278
279 static irqreturn_t
280 gazel_interrupt_ipac(int intno, void *dev_id)
281 {
282         struct IsdnCardState *cs = dev_id;
283         u_char ista, val;
284         int count = 0;
285         u_long flags;
286
287         spin_lock_irqsave(&cs->lock, flags);
288         ista = ReadISAC(cs, IPAC_ISTA - 0x80);
289         do {
290                 if (ista & 0x0f) {
291                         val = ReadHSCX(cs, 1, HSCX_ISTA);
292                         if (ista & 0x01)
293                                 val |= 0x01;
294                         if (ista & 0x04)
295                                 val |= 0x02;
296                         if (ista & 0x08)
297                                 val |= 0x04;
298                         if (val) {
299                                 hscx_int_main(cs, val);
300                         }
301                 }
302                 if (ista & 0x20) {
303                         val = 0xfe & ReadISAC(cs, ISAC_ISTA);
304                         if (val) {
305                                 isac_interrupt(cs, val);
306                         }
307                 }
308                 if (ista & 0x10) {
309                         val = 0x01;
310                         isac_interrupt(cs, val);
311                 }
312                 ista = ReadISAC(cs, IPAC_ISTA - 0x80);
313                 count++;
314         }
315         while ((ista & 0x3f) && (count < MAXCOUNT));
316
317         WriteISAC(cs, IPAC_MASK - 0x80, 0xFF);
318         WriteISAC(cs, IPAC_MASK - 0x80, 0xC0);
319         spin_unlock_irqrestore(&cs->lock, flags);
320         return IRQ_HANDLED;
321 }
322
323 static void
324 release_io_gazel(struct IsdnCardState *cs)
325 {
326         unsigned int i;
327
328         switch (cs->subtyp) {
329         case R647:
330                 for (i = 0x0000; i < 0xC000; i += 0x1000)
331                         release_region(i + cs->hw.gazel.hscx[0], 16);
332                 release_region(0xC000 + cs->hw.gazel.hscx[0], 1);
333                 break;
334
335         case R685:
336                 release_region(cs->hw.gazel.hscx[0], 0x100);
337                 release_region(cs->hw.gazel.cfg_reg, 0x80);
338                 break;
339
340         case R753:
341                 release_region(cs->hw.gazel.ipac, 0x8);
342                 release_region(cs->hw.gazel.cfg_reg, 0x80);
343                 break;
344
345         case R742:
346                 release_region(cs->hw.gazel.ipac, 8);
347                 break;
348         }
349 }
350
351 static int
352 reset_gazel(struct IsdnCardState *cs)
353 {
354         unsigned long plxcntrl, addr = cs->hw.gazel.cfg_reg;
355
356         switch (cs->subtyp) {
357         case R647:
358                 writereg(addr, 0, 0);
359                 HZDELAY(10);
360                 writereg(addr, 0, 1);
361                 HZDELAY(2);
362                 break;
363         case R685:
364                 plxcntrl = inl(addr + PLX_CNTRL);
365                 plxcntrl |= (RESET_9050 + RESET_GAZEL);
366                 outl(plxcntrl, addr + PLX_CNTRL);
367                 plxcntrl &= ~(RESET_9050 + RESET_GAZEL);
368                 HZDELAY(4);
369                 outl(plxcntrl, addr + PLX_CNTRL);
370                 HZDELAY(10);
371                 outb(INT_ISAC_EN + INT_HSCX_EN + INT_PCI_EN, addr + PLX_INCSR);
372                 break;
373         case R753:
374                 plxcntrl = inl(addr + PLX_CNTRL);
375                 plxcntrl |= (RESET_9050 + RESET_GAZEL);
376                 outl(plxcntrl, addr + PLX_CNTRL);
377                 plxcntrl &= ~(RESET_9050 + RESET_GAZEL);
378                 WriteISAC(cs, IPAC_POTA2 - 0x80, 0x20);
379                 HZDELAY(4);
380                 outl(plxcntrl, addr + PLX_CNTRL);
381                 HZDELAY(10);
382                 WriteISAC(cs, IPAC_POTA2 - 0x80, 0x00);
383                 WriteISAC(cs, IPAC_ACFG - 0x80, 0xff);
384                 WriteISAC(cs, IPAC_AOE - 0x80, 0x0);
385                 WriteISAC(cs, IPAC_MASK - 0x80, 0xff);
386                 WriteISAC(cs, IPAC_CONF - 0x80, 0x1);
387                 outb(INT_IPAC_EN + INT_PCI_EN, addr + PLX_INCSR);
388                 WriteISAC(cs, IPAC_MASK - 0x80, 0xc0);
389                 break;
390         case R742:
391                 WriteISAC(cs, IPAC_POTA2 - 0x80, 0x20);
392                 HZDELAY(4);
393                 WriteISAC(cs, IPAC_POTA2 - 0x80, 0x00);
394                 WriteISAC(cs, IPAC_ACFG - 0x80, 0xff);
395                 WriteISAC(cs, IPAC_AOE - 0x80, 0x0);
396                 WriteISAC(cs, IPAC_MASK - 0x80, 0xff);
397                 WriteISAC(cs, IPAC_CONF - 0x80, 0x1);
398                 WriteISAC(cs, IPAC_MASK - 0x80, 0xc0);
399                 break;
400         }
401         return (0);
402 }
403
404 static int
405 Gazel_card_msg(struct IsdnCardState *cs, int mt, void *arg)
406 {
407         u_long flags;
408
409         switch (mt) {
410         case CARD_RESET:
411                 spin_lock_irqsave(&cs->lock, flags);
412                 reset_gazel(cs);
413                 spin_unlock_irqrestore(&cs->lock, flags);
414                 return (0);
415         case CARD_RELEASE:
416                 release_io_gazel(cs);
417                 return (0);
418         case CARD_INIT:
419                 spin_lock_irqsave(&cs->lock, flags);
420                 inithscxisac(cs, 1);
421                 if ((cs->subtyp == R647) || (cs->subtyp == R685)) {
422                         int i;
423                         for (i = 0; i < (2 + MAX_WAITING_CALLS); i++) {
424                                 cs->bcs[i].hw.hscx.tsaxr0 = 0x1f;
425                                 cs->bcs[i].hw.hscx.tsaxr1 = 0x23;
426                         }
427                 }
428                 spin_unlock_irqrestore(&cs->lock, flags);
429                 return (0);
430         case CARD_TEST:
431                 return (0);
432         }
433         return (0);
434 }
435
436 static int
437 reserve_regions(struct IsdnCard *card, struct IsdnCardState *cs)
438 {
439         unsigned int i, j, base = 0, adr = 0, len = 0;
440
441         switch (cs->subtyp) {
442         case R647:
443                 base = cs->hw.gazel.hscx[0];
444                 if (!request_region(adr = (0xC000 + base), len = 1, "gazel"))
445                         goto error;
446                 for (i = 0x0000; i < 0xC000; i += 0x1000) {
447                         if (!request_region(adr = (i + base), len = 16, "gazel"))
448                                 goto error;
449                 }
450                 if (i != 0xC000) {
451                         for (j = 0; j < i; j += 0x1000)
452                                 release_region(j + base, 16);
453                         release_region(0xC000 + base, 1);
454                         goto error;
455                 }
456                 break;
457
458         case R685:
459                 if (!request_region(adr = cs->hw.gazel.hscx[0], len = 0x100, "gazel"))
460                         goto error;
461                 if (!request_region(adr = cs->hw.gazel.cfg_reg, len = 0x80, "gazel")) {
462                         release_region(cs->hw.gazel.hscx[0], 0x100);
463                         goto error;
464                 }
465                 break;
466
467         case R753:
468                 if (!request_region(adr = cs->hw.gazel.ipac, len = 0x8, "gazel"))
469                         goto error;
470                 if (!request_region(adr = cs->hw.gazel.cfg_reg, len = 0x80, "gazel")) {
471                         release_region(cs->hw.gazel.ipac, 8);
472                         goto error;
473                 }
474                 break;
475
476         case R742:
477                 if (!request_region(adr = cs->hw.gazel.ipac, len = 0x8, "gazel"))
478                         goto error;
479                 break;
480         }
481
482         return 0;
483
484 error:
485         printk(KERN_WARNING "Gazel: io ports 0x%x-0x%x already in use\n",
486                adr, adr + len);
487         return 1;
488 }
489
490 static int setup_gazelisa(struct IsdnCard *card, struct IsdnCardState *cs)
491 {
492         printk(KERN_INFO "Gazel: ISA PnP card automatic recognition\n");
493         // we got an irq parameter, assume it is an ISA card
494         // R742 decodes address even in not started...
495         // R647 returns FF if not present or not started
496         // eventually needs improvment
497         if (readreg_ipac(card->para[1], IPAC_ID) == 1)
498                 cs->subtyp = R742;
499         else
500                 cs->subtyp = R647;
501
502         setup_isac(cs);
503         cs->hw.gazel.cfg_reg = card->para[1] + 0xC000;
504         cs->hw.gazel.ipac = card->para[1];
505         cs->hw.gazel.isac = card->para[1] + 0x8000;
506         cs->hw.gazel.hscx[0] = card->para[1];
507         cs->hw.gazel.hscx[1] = card->para[1] + 0x4000;
508         cs->irq = card->para[0];
509         cs->hw.gazel.isacfifo = cs->hw.gazel.isac;
510         cs->hw.gazel.hscxfifo[0] = cs->hw.gazel.hscx[0];
511         cs->hw.gazel.hscxfifo[1] = cs->hw.gazel.hscx[1];
512
513         switch (cs->subtyp) {
514         case R647:
515                 printk(KERN_INFO "Gazel: Card ISA R647/R648 found\n");
516                 cs->dc.isac.adf2 = 0x87;
517                 printk(KERN_INFO
518                        "Gazel: config irq:%d isac:0x%X  cfg:0x%X\n",
519                        cs->irq, cs->hw.gazel.isac, cs->hw.gazel.cfg_reg);
520                 printk(KERN_INFO
521                        "Gazel: hscx A:0x%X  hscx B:0x%X\n",
522                        cs->hw.gazel.hscx[0], cs->hw.gazel.hscx[1]);
523
524                 break;
525         case R742:
526                 printk(KERN_INFO "Gazel: Card ISA R742 found\n");
527                 test_and_set_bit(HW_IPAC, &cs->HW_Flags);
528                 printk(KERN_INFO
529                        "Gazel: config irq:%d ipac:0x%X\n",
530                        cs->irq, cs->hw.gazel.ipac);
531                 break;
532         }
533
534         return (0);
535 }
536
537 #ifdef CONFIG_PCI
538 static struct pci_dev *dev_tel = NULL;
539
540 static int setup_gazelpci(struct IsdnCardState *cs)
541 {
542         u_int pci_ioaddr0 = 0, pci_ioaddr1 = 0;
543         u_char pci_irq = 0, found;
544         u_int nbseek, seekcard;
545
546         printk(KERN_WARNING "Gazel: PCI card automatic recognition\n");
547
548         found = 0;
549         seekcard = PCI_DEVICE_ID_PLX_R685;
550         for (nbseek = 0; nbseek < 4; nbseek++) {
551                 if ((dev_tel = hisax_find_pci_device(PCI_VENDOR_ID_PLX,
552                                                      seekcard, dev_tel))) {
553                         if (pci_enable_device(dev_tel))
554                                 return 1;
555                         pci_irq = dev_tel->irq;
556                         pci_ioaddr0 = pci_resource_start(dev_tel, 1);
557                         pci_ioaddr1 = pci_resource_start(dev_tel, 2);
558                         found = 1;
559                 }
560                 if (found)
561                         break;
562                 else {
563                         switch (seekcard) {
564                         case PCI_DEVICE_ID_PLX_R685:
565                                 seekcard = PCI_DEVICE_ID_PLX_R753;
566                                 break;
567                         case PCI_DEVICE_ID_PLX_R753:
568                                 seekcard = PCI_DEVICE_ID_PLX_DJINN_ITOO;
569                                 break;
570                         case PCI_DEVICE_ID_PLX_DJINN_ITOO:
571                                 seekcard = PCI_DEVICE_ID_PLX_OLITEC;
572                                 break;
573                         }
574                 }
575         }
576         if (!found) {
577                 printk(KERN_WARNING "Gazel: No PCI card found\n");
578                 return (1);
579         }
580         if (!pci_irq) {
581                 printk(KERN_WARNING "Gazel: No IRQ for PCI card found\n");
582                 return 1;
583         }
584         cs->hw.gazel.pciaddr[0] = pci_ioaddr0;
585         cs->hw.gazel.pciaddr[1] = pci_ioaddr1;
586         setup_isac(cs);
587         pci_ioaddr1 &= 0xfffe;
588         cs->hw.gazel.cfg_reg = pci_ioaddr0 & 0xfffe;
589         cs->hw.gazel.ipac = pci_ioaddr1;
590         cs->hw.gazel.isac = pci_ioaddr1 + 0x80;
591         cs->hw.gazel.hscx[0] = pci_ioaddr1;
592         cs->hw.gazel.hscx[1] = pci_ioaddr1 + 0x40;
593         cs->hw.gazel.isacfifo = cs->hw.gazel.isac;
594         cs->hw.gazel.hscxfifo[0] = cs->hw.gazel.hscx[0];
595         cs->hw.gazel.hscxfifo[1] = cs->hw.gazel.hscx[1];
596         cs->irq = pci_irq;
597         cs->irq_flags |= IRQF_SHARED;
598
599         switch (seekcard) {
600         case PCI_DEVICE_ID_PLX_R685:
601                 printk(KERN_INFO "Gazel: Card PCI R685 found\n");
602                 cs->subtyp = R685;
603                 cs->dc.isac.adf2 = 0x87;
604                 printk(KERN_INFO
605                        "Gazel: config irq:%d isac:0x%X  cfg:0x%X\n",
606                        cs->irq, cs->hw.gazel.isac, cs->hw.gazel.cfg_reg);
607                 printk(KERN_INFO
608                        "Gazel: hscx A:0x%X  hscx B:0x%X\n",
609                        cs->hw.gazel.hscx[0], cs->hw.gazel.hscx[1]);
610                 break;
611         case PCI_DEVICE_ID_PLX_R753:
612         case PCI_DEVICE_ID_PLX_DJINN_ITOO:
613         case PCI_DEVICE_ID_PLX_OLITEC:
614                 printk(KERN_INFO "Gazel: Card PCI R753 found\n");
615                 cs->subtyp = R753;
616                 test_and_set_bit(HW_IPAC, &cs->HW_Flags);
617                 printk(KERN_INFO
618                        "Gazel: config irq:%d ipac:0x%X  cfg:0x%X\n",
619                        cs->irq, cs->hw.gazel.ipac, cs->hw.gazel.cfg_reg);
620                 break;
621         }
622
623         return (0);
624 }
625 #endif /* CONFIG_PCI */
626
627 int 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
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 }