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[ARM] pxa: Gumstix Verdex PCMCIA support
[linux-2.6/verdex.git] / drivers / sn / ioc3.c
blob816d4c592a3ca6d609e4c9481ad2e4ef2ee05a9c
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 __func__, 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 __func__, 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_BIT_MASK(64));
621 if (!ret) {
622 ret = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
623 if (ret < 0) {
624 printk(KERN_WARNING "%s: Unable to obtain 64 bit DMA "
625 "for consistent allocations\n",
626 __func__);
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 __func__, 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 __func__, 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 __func__, 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 __func__, 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 __func__, 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 __func__, 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 __func__, 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 __func__,
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);
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