some kmalloc/memset ->kzalloc (tree wide)
[linux-2.6.git] / drivers / sn / ioc3.c
1 /*
2  * SGI IOC3 master driver and IRQ demuxer
3  *
4  * Copyright (c) 2005 Stanislaw Skowronek <skylark@linux-mips.org>
5  * Heavily based on similar work by:
6  *   Brent Casavant <bcasavan@sgi.com> - IOC4 master driver
7  *   Pat Gefre <pfg@sgi.com> - IOC3 serial port IRQ demuxer
8  */
9
10 #include <linux/errno.h>
11 #include <linux/module.h>
12 #include <linux/pci.h>
13 #include <linux/dma-mapping.h>
14 #include <linux/interrupt.h>
15 #include <linux/spinlock.h>
16 #include <linux/delay.h>
17 #include <linux/ioc3.h>
18 #include <linux/rwsem.h>
19
20 #define IOC3_PCI_SIZE 0x100000
21
22 static LIST_HEAD(ioc3_devices);
23 static int ioc3_counter;
24 static DECLARE_RWSEM(ioc3_devices_rwsem);
25
26 static struct ioc3_submodule *ioc3_submodules[IOC3_MAX_SUBMODULES];
27 static struct ioc3_submodule *ioc3_ethernet;
28 static DEFINE_RWLOCK(ioc3_submodules_lock);
29
30 /* NIC probing code */
31
32 #define GPCR_MLAN_EN    0x00200000      /* enable MCR to pin 8 */
33
34 static inline unsigned mcr_pack(unsigned pulse, unsigned sample)
35 {
36         return (pulse << 10) | (sample << 2);
37 }
38
39 static int nic_wait(struct ioc3_driver_data *idd)
40 {
41         unsigned mcr;
42
43         do {
44                 mcr = readl(&idd->vma->mcr);
45         } while (!(mcr & 2));
46
47         return mcr & 1;
48 }
49
50 static int nic_reset(struct ioc3_driver_data *idd)
51 {
52         int presence;
53         unsigned long flags;
54
55         local_irq_save(flags);
56         writel(mcr_pack(500, 65), &idd->vma->mcr);
57         presence = nic_wait(idd);
58         local_irq_restore(flags);
59
60         udelay(500);
61
62         return presence;
63 }
64
65 static int nic_read_bit(struct ioc3_driver_data *idd)
66 {
67         int result;
68         unsigned long flags;
69
70         local_irq_save(flags);
71         writel(mcr_pack(6, 13), &idd->vma->mcr);
72         result = nic_wait(idd);
73         local_irq_restore(flags);
74
75         udelay(500);
76
77         return result;
78 }
79
80 static void nic_write_bit(struct ioc3_driver_data *idd, int bit)
81 {
82         if (bit)
83                 writel(mcr_pack(6, 110), &idd->vma->mcr);
84         else
85                 writel(mcr_pack(80, 30), &idd->vma->mcr);
86
87         nic_wait(idd);
88 }
89
90 static unsigned nic_read_byte(struct ioc3_driver_data *idd)
91 {
92         unsigned result = 0;
93         int i;
94
95         for (i = 0; i < 8; i++)
96                 result = (result >> 1) | (nic_read_bit(idd) << 7);
97
98         return result;
99 }
100
101 static void nic_write_byte(struct ioc3_driver_data *idd, int byte)
102 {
103         int i, bit;
104
105         for (i = 8; i; i--) {
106                 bit = byte & 1;
107                 byte >>= 1;
108
109                 nic_write_bit(idd, bit);
110         }
111 }
112
113 static unsigned long
114 nic_find(struct ioc3_driver_data *idd, int *last, unsigned long addr)
115 {
116         int a, b, index, disc;
117
118         nic_reset(idd);
119
120         /* Search ROM.  */
121         nic_write_byte(idd, 0xF0);
122
123         /* Algorithm from ``Book of iButton Standards''.  */
124         for (index = 0, disc = 0; index < 64; index++) {
125                 a = nic_read_bit(idd);
126                 b = nic_read_bit(idd);
127
128                 if (a && b) {
129                         printk(KERN_WARNING "IOC3 NIC search failed.\n");
130                         *last = 0;
131                         return 0;
132                 }
133
134                 if (!a && !b) {
135                         if (index == *last) {
136                                 addr |= 1UL << index;
137                         } else if (index > *last) {
138                                 addr &= ~(1UL << index);
139                                 disc = index;
140                         } else if ((addr & (1UL << index)) == 0)
141                                 disc = index;
142                         nic_write_bit(idd, (addr>>index)&1);
143                         continue;
144                 } else {
145                         if (a)
146                                 addr |= 1UL << index;
147                         else
148                                 addr &= ~(1UL << index);
149                         nic_write_bit(idd, a);
150                         continue;
151                 }
152         }
153         *last = disc;
154         return addr;
155 }
156
157 static void nic_addr(struct ioc3_driver_data *idd, unsigned long addr)
158 {
159         int index;
160
161         nic_reset(idd);
162         nic_write_byte(idd, 0xF0);
163         for (index = 0; index < 64; index++) {
164                 nic_read_bit(idd);
165                 nic_read_bit(idd);
166                 nic_write_bit(idd, (addr>>index)&1);
167         }
168 }
169
170 static void crc16_byte(unsigned int *crc, unsigned char db)
171 {
172         int i;
173
174         for(i=0;i<8;i++) {
175                 *crc <<= 1;
176                 if((db^(*crc>>16)) & 1)
177                         *crc ^= 0x8005;
178                 db >>= 1;
179         }
180         *crc &= 0xFFFF;
181 }
182
183 static unsigned int crc16_area(unsigned char *dbs, int size, unsigned int crc)
184 {
185         while(size--)
186                 crc16_byte(&crc, *(dbs++));
187         return crc;
188 }
189
190 static void crc8_byte(unsigned int *crc, unsigned char db)
191 {
192         int i,f;
193
194         for(i=0;i<8;i++) {
195                 f = (*crc ^ db) & 1;
196                 *crc >>= 1;
197                 db >>= 1;
198                 if(f)
199                         *crc ^= 0x8c;
200         }
201         *crc &= 0xff;
202 }
203
204 static unsigned int crc8_addr(unsigned long addr)
205 {
206         int i;
207         unsigned int crc = 0x00;
208
209         for(i=0;i<8;i++)
210                 crc8_byte(&crc, addr>>(i<<3));
211         return crc;
212 }
213
214 static void
215 read_redir_page(struct ioc3_driver_data *idd, unsigned long addr, int page,
216                         unsigned char *redir, unsigned char *data)
217 {
218         int loops = 16, i;
219
220         while(redir[page] != 0xFF) {
221                 page = redir[page]^0xFF;
222                 loops--;
223                 if(loops<0) {
224                         printk(KERN_ERR "IOC3: NIC circular redirection\n");
225                         return;
226                 }
227         }
228         loops = 3;
229         while(loops>0) {
230                 nic_addr(idd, addr);
231                 nic_write_byte(idd, 0xF0);
232                 nic_write_byte(idd, (page << 5) & 0xE0);
233                 nic_write_byte(idd, (page >> 3) & 0x1F);
234                 for(i=0;i<0x20;i++)
235                         data[i] = nic_read_byte(idd);
236                 if(crc16_area(data, 0x20, 0x0000) == 0x800d)
237                         return;
238                 loops--;
239         }
240         printk(KERN_ERR "IOC3: CRC error in data page\n");
241         for(i=0;i<0x20;i++)
242                 data[i] = 0x00;
243 }
244
245 static void
246 read_redir_map(struct ioc3_driver_data *idd, unsigned long addr,
247                                          unsigned char *redir)
248 {
249         int i,j,loops = 3,crc_ok;
250         unsigned int crc;
251
252         while(loops>0) {
253                 crc_ok = 1;
254                 nic_addr(idd, addr);
255                 nic_write_byte(idd, 0xAA);
256                 nic_write_byte(idd, 0x00);
257                 nic_write_byte(idd, 0x01);
258                 for(i=0;i<64;i+=8) {
259                         for(j=0;j<8;j++)
260                                 redir[i+j] = nic_read_byte(idd);
261                         crc = crc16_area(redir+i, 8, (i==0)?0x8707:0x0000);
262                         crc16_byte(&crc, nic_read_byte(idd));
263                         crc16_byte(&crc, nic_read_byte(idd));
264                         if(crc != 0x800d)
265                                 crc_ok = 0;
266                 }
267                 if(crc_ok)
268                         return;
269                 loops--;
270         }
271         printk(KERN_ERR "IOC3: CRC error in redirection page\n");
272         for(i=0;i<64;i++)
273                 redir[i] = 0xFF;
274 }
275
276 static void read_nic(struct ioc3_driver_data *idd, unsigned long addr)
277 {
278         unsigned char redir[64];
279         unsigned char data[64],part[32];
280         int i,j;
281
282         /* read redirections */
283         read_redir_map(idd, addr, redir);
284         /* read data pages */
285         read_redir_page(idd, addr, 0, redir, data);
286         read_redir_page(idd, addr, 1, redir, data+32);
287         /* assemble the part # */
288         j=0;
289         for(i=0;i<19;i++)
290                 if(data[i+11] != ' ')
291                         part[j++] = data[i+11];
292         for(i=0;i<6;i++)
293                 if(data[i+32] != ' ')
294                         part[j++] = data[i+32];
295         part[j] = 0;
296         /* skip Octane power supplies */
297         if(!strncmp(part, "060-0035-", 9))
298                 return;
299         if(!strncmp(part, "060-0038-", 9))
300                 return;
301         strcpy(idd->nic_part, part);
302         /* assemble the serial # */
303         j=0;
304         for(i=0;i<10;i++)
305                 if(data[i+1] != ' ')
306                         idd->nic_serial[j++] = data[i+1];
307         idd->nic_serial[j] = 0;
308 }
309
310 static void read_mac(struct ioc3_driver_data *idd, unsigned long addr)
311 {
312         int i, loops = 3;
313         unsigned char data[13];
314
315         while(loops>0) {
316                 nic_addr(idd, addr);
317                 nic_write_byte(idd, 0xF0);
318                 nic_write_byte(idd, 0x00);
319                 nic_write_byte(idd, 0x00);
320                 nic_read_byte(idd);
321                 for(i=0;i<13;i++)
322                         data[i] = nic_read_byte(idd);
323                 if(crc16_area(data, 13, 0x0000) == 0x800d) {
324                         for(i=10;i>4;i--)
325                                 idd->nic_mac[10-i] = data[i];
326                         return;
327                 }
328                 loops--;
329         }
330         printk(KERN_ERR "IOC3: CRC error in MAC address\n");
331         for(i=0;i<6;i++)
332                 idd->nic_mac[i] = 0x00;
333 }
334
335 static void probe_nic(struct ioc3_driver_data *idd)
336 {
337         int save = 0, loops = 3;
338         unsigned long first, addr;
339
340         writel(GPCR_MLAN_EN, &idd->vma->gpcr_s);
341
342         while(loops>0) {
343                 idd->nic_part[0] = 0;
344                 idd->nic_serial[0] = 0;
345                 addr = first = nic_find(idd, &save, 0);
346                 if(!first)
347                         return;
348                 while(1) {
349                         if(crc8_addr(addr))
350                                 break;
351                         else {
352                                 switch(addr & 0xFF) {
353                                 case 0x0B:
354                                         read_nic(idd, addr);
355                                         break;
356                                 case 0x09:
357                                 case 0x89:
358                                 case 0x91:
359                                         read_mac(idd, addr);
360                                         break;
361                                 }
362                         }
363                         addr = nic_find(idd, &save, addr);
364                         if(addr == first)
365                                 return;
366                 }
367                 loops--;
368         }
369         printk(KERN_ERR "IOC3: CRC error in NIC address\n");
370 }
371
372 /* Interrupts */
373
374 static void write_ireg(struct ioc3_driver_data *idd, uint32_t val, int which)
375 {
376         unsigned long flags;
377
378         spin_lock_irqsave(&idd->ir_lock, flags);
379         switch (which) {
380         case IOC3_W_IES:
381                 writel(val, &idd->vma->sio_ies);
382                 break;
383         case IOC3_W_IEC:
384                 writel(val, &idd->vma->sio_iec);
385                 break;
386         }
387         spin_unlock_irqrestore(&idd->ir_lock, flags);
388 }
389 static inline uint32_t get_pending_intrs(struct ioc3_driver_data *idd)
390 {
391         unsigned long flag;
392         uint32_t intrs = 0;
393
394         spin_lock_irqsave(&idd->ir_lock, flag);
395         intrs = readl(&idd->vma->sio_ir);
396         intrs &= readl(&idd->vma->sio_ies);
397         spin_unlock_irqrestore(&idd->ir_lock, flag);
398         return intrs;
399 }
400
401 static irqreturn_t ioc3_intr_io(int irq, void *arg)
402 {
403         unsigned long flags;
404         struct ioc3_driver_data *idd = arg;
405         int handled = 1, id;
406         unsigned int pending;
407
408         read_lock_irqsave(&ioc3_submodules_lock, flags);
409
410         if(idd->dual_irq && readb(&idd->vma->eisr)) {
411                 /* send Ethernet IRQ to the driver */
412                 if(ioc3_ethernet && idd->active[ioc3_ethernet->id] &&
413                                                 ioc3_ethernet->intr) {
414                         handled = handled && !ioc3_ethernet->intr(ioc3_ethernet,
415                                                         idd, 0);
416                 }
417         }
418         pending = get_pending_intrs(idd);       /* look at the IO IRQs */
419
420         for(id=0;id<IOC3_MAX_SUBMODULES;id++) {
421                 if(idd->active[id] && ioc3_submodules[id]
422                                 && (pending & ioc3_submodules[id]->irq_mask)
423                                 && ioc3_submodules[id]->intr) {
424                         write_ireg(idd, ioc3_submodules[id]->irq_mask,
425                                                         IOC3_W_IEC);
426                         if(!ioc3_submodules[id]->intr(ioc3_submodules[id],
427                                    idd, pending & ioc3_submodules[id]->irq_mask))
428                                 pending &= ~ioc3_submodules[id]->irq_mask;
429                         if (ioc3_submodules[id]->reset_mask)
430                                 write_ireg(idd, ioc3_submodules[id]->irq_mask,
431                                                         IOC3_W_IES);
432                 }
433         }
434         read_unlock_irqrestore(&ioc3_submodules_lock, flags);
435         if(pending) {
436                 printk(KERN_WARNING
437                   "IOC3: Pending IRQs 0x%08x discarded and disabled\n",pending);
438                 write_ireg(idd, pending, IOC3_W_IEC);
439                 handled = 1;
440         }
441         return handled?IRQ_HANDLED:IRQ_NONE;
442 }
443
444 static irqreturn_t ioc3_intr_eth(int irq, void *arg)
445 {
446         unsigned long flags;
447         struct ioc3_driver_data *idd = (struct ioc3_driver_data *)arg;
448         int handled = 1;
449
450         if(!idd->dual_irq)
451                 return IRQ_NONE;
452         read_lock_irqsave(&ioc3_submodules_lock, flags);
453         if(ioc3_ethernet && idd->active[ioc3_ethernet->id]
454                                 && ioc3_ethernet->intr)
455                 handled = handled && !ioc3_ethernet->intr(ioc3_ethernet, idd, 0);
456         read_unlock_irqrestore(&ioc3_submodules_lock, flags);
457         return handled?IRQ_HANDLED:IRQ_NONE;
458 }
459
460 void ioc3_enable(struct ioc3_submodule *is,
461                                 struct ioc3_driver_data *idd, unsigned int irqs)
462 {
463         write_ireg(idd, irqs & is->irq_mask, IOC3_W_IES);
464 }
465
466 void ioc3_ack(struct ioc3_submodule *is, struct ioc3_driver_data *idd,
467                                 unsigned int irqs)
468 {
469         writel(irqs & is->irq_mask, &idd->vma->sio_ir);
470 }
471
472 void ioc3_disable(struct ioc3_submodule *is,
473                                 struct ioc3_driver_data *idd, unsigned int irqs)
474 {
475         write_ireg(idd, irqs & is->irq_mask, IOC3_W_IEC);
476 }
477
478 void ioc3_gpcr_set(struct ioc3_driver_data *idd, unsigned int val)
479 {
480         unsigned long flags;
481         spin_lock_irqsave(&idd->gpio_lock, flags);
482         writel(val, &idd->vma->gpcr_s);
483         spin_unlock_irqrestore(&idd->gpio_lock, flags);
484 }
485
486 /* Keep it simple, stupid! */
487 static int find_slot(void **tab, int max)
488 {
489         int i;
490         for(i=0;i<max;i++)
491                 if(!(tab[i]))
492                         return i;
493         return -1;
494 }
495
496 /* Register an IOC3 submodule */
497 int ioc3_register_submodule(struct ioc3_submodule *is)
498 {
499         struct ioc3_driver_data *idd;
500         int alloc_id;
501         unsigned long flags;
502
503         write_lock_irqsave(&ioc3_submodules_lock, flags);
504         alloc_id = find_slot((void **)ioc3_submodules, IOC3_MAX_SUBMODULES);
505         if(alloc_id != -1) {
506                 ioc3_submodules[alloc_id] = is;
507                 if(is->ethernet) {
508                         if(ioc3_ethernet==NULL)
509                                 ioc3_ethernet=is;
510                         else
511                                 printk(KERN_WARNING
512                                   "IOC3 Ethernet module already registered!\n");
513                 }
514         }
515         write_unlock_irqrestore(&ioc3_submodules_lock, flags);
516
517         if(alloc_id == -1) {
518                 printk(KERN_WARNING "Increase IOC3_MAX_SUBMODULES!\n");
519                 return -ENOMEM;
520         }
521
522         is->id=alloc_id;
523
524         /* Initialize submodule for each IOC3 */
525         if (!is->probe)
526                 return 0;
527
528         down_read(&ioc3_devices_rwsem);
529         list_for_each_entry(idd, &ioc3_devices, list) {
530                 /* set to 1 for IRQs in probe */
531                 idd->active[alloc_id] = 1;
532                 idd->active[alloc_id] = !is->probe(is, idd);
533         }
534         up_read(&ioc3_devices_rwsem);
535
536         return 0;
537 }
538
539 /* Unregister an IOC3 submodule */
540 void ioc3_unregister_submodule(struct ioc3_submodule *is)
541 {
542         struct ioc3_driver_data *idd;
543         unsigned long flags;
544
545         write_lock_irqsave(&ioc3_submodules_lock, flags);
546         if(ioc3_submodules[is->id]==is)
547                 ioc3_submodules[is->id]=NULL;
548         else
549                 printk(KERN_WARNING
550                         "IOC3 submodule %s has wrong ID.\n",is->name);
551         if(ioc3_ethernet==is)
552                 ioc3_ethernet = NULL;
553         write_unlock_irqrestore(&ioc3_submodules_lock, flags);
554
555         /* Remove submodule for each IOC3 */
556         down_read(&ioc3_devices_rwsem);
557         list_for_each_entry(idd, &ioc3_devices, list)
558                 if(idd->active[is->id]) {
559                         if(is->remove)
560                                 if(is->remove(is, idd))
561                                         printk(KERN_WARNING
562                                                "%s: IOC3 submodule %s remove failed "
563                                                "for pci_dev %s.\n",
564                                                __FUNCTION__, module_name(is->owner),
565                                                pci_name(idd->pdev));
566                         idd->active[is->id] = 0;
567                         if(is->irq_mask)
568                                 write_ireg(idd, is->irq_mask, IOC3_W_IEC);
569                 }
570         up_read(&ioc3_devices_rwsem);
571 }
572
573 /*********************
574  * Device management *
575  *********************/
576
577 static char *
578 ioc3_class_names[]={"unknown", "IP27 BaseIO", "IP30 system", "MENET 1/2/3",
579                         "MENET 4", "CADduo", "Altix Serial"};
580
581 static int ioc3_class(struct ioc3_driver_data *idd)
582 {
583         int res = IOC3_CLASS_NONE;
584         /* NIC-based logic */
585         if(!strncmp(idd->nic_part, "030-0891-", 9))
586                 res = IOC3_CLASS_BASE_IP30;
587         if(!strncmp(idd->nic_part, "030-1155-", 9))
588                 res = IOC3_CLASS_CADDUO;
589         if(!strncmp(idd->nic_part, "030-1657-", 9))
590                 res = IOC3_CLASS_SERIAL;
591         if(!strncmp(idd->nic_part, "030-1664-", 9))
592                 res = IOC3_CLASS_SERIAL;
593         /* total random heuristics */
594 #ifdef CONFIG_SGI_IP27
595         if(!idd->nic_part[0])
596                 res = IOC3_CLASS_BASE_IP27;
597 #endif
598         /* print educational message */
599         printk(KERN_INFO "IOC3 part: [%s], serial: [%s] => class %s\n",
600                         idd->nic_part, idd->nic_serial, ioc3_class_names[res]);
601         return res;
602 }
603 /* Adds a new instance of an IOC3 card */
604 static int ioc3_probe(struct pci_dev *pdev, const struct pci_device_id *pci_id)
605 {
606         struct ioc3_driver_data *idd;
607         uint32_t pcmd;
608         int ret, id;
609
610         /* Enable IOC3 and take ownership of it */
611         if ((ret = pci_enable_device(pdev))) {
612                 printk(KERN_WARNING
613                        "%s: Failed to enable IOC3 device for pci_dev %s.\n",
614                        __FUNCTION__, pci_name(pdev));
615                 goto out;
616         }
617         pci_set_master(pdev);
618
619 #ifdef USE_64BIT_DMA
620         ret = pci_set_dma_mask(pdev, DMA_64BIT_MASK);
621         if (!ret) {
622                 ret = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK);
623                 if (ret < 0) {
624                         printk(KERN_WARNING "%s: Unable to obtain 64 bit DMA "
625                                "for consistent allocations\n",
626                                 __FUNCTION__);
627                 }
628         }
629 #endif
630
631         /* Set up per-IOC3 data */
632         idd = kzalloc(sizeof(struct ioc3_driver_data), GFP_KERNEL);
633         if (!idd) {
634                 printk(KERN_WARNING
635                        "%s: Failed to allocate IOC3 data for pci_dev %s.\n",
636                        __FUNCTION__, pci_name(pdev));
637                 ret = -ENODEV;
638                 goto out_idd;
639         }
640         spin_lock_init(&idd->ir_lock);
641         spin_lock_init(&idd->gpio_lock);
642         idd->pdev = pdev;
643
644         /* Map all IOC3 registers.  These are shared between subdevices
645          * so the main IOC3 module manages them.
646          */
647         idd->pma = pci_resource_start(pdev, 0);
648         if (!idd->pma) {
649                 printk(KERN_WARNING
650                        "%s: Unable to find IOC3 resource "
651                        "for pci_dev %s.\n",
652                        __FUNCTION__, pci_name(pdev));
653                 ret = -ENODEV;
654                 goto out_pci;
655         }
656         if (!request_mem_region(idd->pma, IOC3_PCI_SIZE, "ioc3")) {
657                 printk(KERN_WARNING
658                        "%s: Unable to request IOC3 region "
659                        "for pci_dev %s.\n",
660                        __FUNCTION__, pci_name(pdev));
661                 ret = -ENODEV;
662                 goto out_pci;
663         }
664         idd->vma = ioremap(idd->pma, IOC3_PCI_SIZE);
665         if (!idd->vma) {
666                 printk(KERN_WARNING
667                        "%s: Unable to remap IOC3 region "
668                        "for pci_dev %s.\n",
669                        __FUNCTION__, pci_name(pdev));
670                 ret = -ENODEV;
671                 goto out_misc_region;
672         }
673
674         /* Track PCI-device specific data */
675         pci_set_drvdata(pdev, idd);
676         down_write(&ioc3_devices_rwsem);
677         list_add_tail(&idd->list, &ioc3_devices);
678         idd->id = ioc3_counter++;
679         up_write(&ioc3_devices_rwsem);
680
681         idd->gpdr_shadow = readl(&idd->vma->gpdr);
682
683         /* Read IOC3 NIC contents */
684         probe_nic(idd);
685
686         /* Detect IOC3 class */
687         idd->class = ioc3_class(idd);
688
689         /* Initialize IOC3 */
690        pci_read_config_dword(pdev, PCI_COMMAND, &pcmd);
691        pci_write_config_dword(pdev, PCI_COMMAND,
692                                pcmd | PCI_COMMAND_MEMORY |
693                                PCI_COMMAND_PARITY | PCI_COMMAND_SERR |
694                                PCI_SCR_DROP_MODE_EN);
695
696         write_ireg(idd, ~0, IOC3_W_IEC);
697         writel(~0, &idd->vma->sio_ir);
698
699         /* Set up IRQs */
700         if(idd->class == IOC3_CLASS_BASE_IP30
701                                 || idd->class == IOC3_CLASS_BASE_IP27) {
702                 writel(0, &idd->vma->eier);
703                 writel(~0, &idd->vma->eisr);
704
705                 idd->dual_irq = 1;
706                 if (!request_irq(pdev->irq, ioc3_intr_eth, IRQF_SHARED,
707                                  "ioc3-eth", (void *)idd)) {
708                         idd->irq_eth = pdev->irq;
709                 } else {
710                         printk(KERN_WARNING
711                                "%s : request_irq fails for IRQ 0x%x\n ",
712                                __FUNCTION__, pdev->irq);
713                 }
714                 if (!request_irq(pdev->irq+2, ioc3_intr_io, IRQF_SHARED,
715                                  "ioc3-io", (void *)idd)) {
716                         idd->irq_io = pdev->irq+2;
717                 } else {
718                         printk(KERN_WARNING
719                                "%s : request_irq fails for IRQ 0x%x\n ",
720                                __FUNCTION__, pdev->irq+2);
721                 }
722         } else {
723                 if (!request_irq(pdev->irq, ioc3_intr_io, IRQF_SHARED,
724                                  "ioc3", (void *)idd)) {
725                         idd->irq_io = pdev->irq;
726                 } else {
727                         printk(KERN_WARNING
728                                "%s : request_irq fails for IRQ 0x%x\n ",
729                                __FUNCTION__, pdev->irq);
730                 }
731         }
732
733         /* Add this IOC3 to all submodules */
734         for(id=0;id<IOC3_MAX_SUBMODULES;id++)
735                 if(ioc3_submodules[id] && ioc3_submodules[id]->probe) {
736                         idd->active[id] = 1;
737                         idd->active[id] = !ioc3_submodules[id]->probe
738                                                 (ioc3_submodules[id], idd);
739                 }
740
741         printk(KERN_INFO "IOC3 Master Driver loaded for %s\n", pci_name(pdev));
742
743         return 0;
744
745 out_misc_region:
746         release_mem_region(idd->pma, IOC3_PCI_SIZE);
747 out_pci:
748         kfree(idd);
749 out_idd:
750         pci_disable_device(pdev);
751 out:
752         return ret;
753 }
754
755 /* Removes a particular instance of an IOC3 card. */
756 static void ioc3_remove(struct pci_dev *pdev)
757 {
758         int id;
759         struct ioc3_driver_data *idd;
760
761         idd = pci_get_drvdata(pdev);
762
763         /* Remove this IOC3 from all submodules */
764         for(id=0;id<IOC3_MAX_SUBMODULES;id++)
765                 if(idd->active[id]) {
766                         if(ioc3_submodules[id] && ioc3_submodules[id]->remove)
767                                 if(ioc3_submodules[id]->remove(ioc3_submodules[id],
768                                                                 idd))
769                                         printk(KERN_WARNING
770                                                "%s: IOC3 submodule 0x%s remove failed "
771                                                "for pci_dev %s.\n",
772                                                 __FUNCTION__,
773                                                 module_name(ioc3_submodules[id]->owner),
774                                                 pci_name(pdev));
775                         idd->active[id] = 0;
776                 }
777
778         /* Clear and disable all IRQs */
779         write_ireg(idd, ~0, IOC3_W_IEC);
780         writel(~0, &idd->vma->sio_ir);
781
782         /* Release resources */
783         free_irq(idd->irq_io, (void *)idd);
784         if(idd->dual_irq)
785                 free_irq(idd->irq_eth, (void *)idd);
786         iounmap(idd->vma);
787         release_mem_region(idd->pma, IOC3_PCI_SIZE);
788
789         /* Disable IOC3 and relinquish */
790         pci_disable_device(pdev);
791
792         /* Remove and free driver data */
793         down_write(&ioc3_devices_rwsem);
794         list_del(&idd->list);
795         up_write(&ioc3_devices_rwsem);
796         kfree(idd);
797 }
798
799 static struct pci_device_id ioc3_id_table[] = {
800         {PCI_VENDOR_ID_SGI, PCI_DEVICE_ID_SGI_IOC3, PCI_ANY_ID, PCI_ANY_ID},
801         {0}
802 };
803
804 static struct pci_driver ioc3_driver = {
805         .name = "IOC3",
806         .id_table = ioc3_id_table,
807         .probe = ioc3_probe,
808         .remove = ioc3_remove,
809 };
810
811 MODULE_DEVICE_TABLE(pci, ioc3_id_table);
812
813 /*********************
814  * Module management *
815  *********************/
816
817 /* Module load */
818 static int __devinit ioc3_init(void)
819 {
820         if (ia64_platform_is("sn2"))
821                 return pci_register_driver(&ioc3_driver);
822         return 0;
823 }
824
825 /* Module unload */
826 static void __devexit ioc3_exit(void)
827 {
828         pci_unregister_driver(&ioc3_driver);
829 }
830
831 module_init(ioc3_init);
832 module_exit(ioc3_exit);
833
834 MODULE_AUTHOR("Stanislaw Skowronek <skylark@linux-mips.org>");
835 MODULE_DESCRIPTION("PCI driver for SGI IOC3");
836 MODULE_LICENSE("GPL");
837
838 EXPORT_SYMBOL_GPL(ioc3_register_submodule);
839 EXPORT_SYMBOL_GPL(ioc3_unregister_submodule);
840 EXPORT_SYMBOL_GPL(ioc3_ack);
841 EXPORT_SYMBOL_GPL(ioc3_gpcr_set);
842 EXPORT_SYMBOL_GPL(ioc3_disable);
843 EXPORT_SYMBOL_GPL(ioc3_enable);