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