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Linux 3.18-rc4
[linux-2.6/luiz-linux-2.6.git] / drivers / sn / ioc3.c
blobfb7ea0d9a734dad8de9cbc66c6a80c7bab958b23
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 #include <linux/slab.h>
20
21 #define IOC3_PCI_SIZE 0x100000
22
23 static LIST_HEAD(ioc3_devices);
24 static int ioc3_counter;
25 static DECLARE_RWSEM(ioc3_devices_rwsem);
26
27 static struct ioc3_submodule *ioc3_submodules[IOC3_MAX_SUBMODULES];
28 static struct ioc3_submodule *ioc3_ethernet;
29 static DEFINE_RWLOCK(ioc3_submodules_lock);
30
31 /* NIC probing code */
32
33 #define GPCR_MLAN_EN 0x00200000 /* enable MCR to pin 8 */
34
35 static inline unsigned mcr_pack(unsigned pulse, unsigned sample)
36 {
37 return (pulse << 10) | (sample << 2);
38 }
39
40 static int nic_wait(struct ioc3_driver_data *idd)
41 {
42 unsigned mcr;
43
44 do {
45 mcr = readl(&idd->vma->mcr);
46 } while (!(mcr & 2));
47
48 return mcr & 1;
49 }
50
51 static int nic_reset(struct ioc3_driver_data *idd)
52 {
53 int presence;
54 unsigned long flags;
55
56 local_irq_save(flags);
57 writel(mcr_pack(500, 65), &idd->vma->mcr);
58 presence = nic_wait(idd);
59 local_irq_restore(flags);
60
61 udelay(500);
62
63 return presence;
64 }
65
66 static int nic_read_bit(struct ioc3_driver_data *idd)
67 {
68 int result;
69 unsigned long flags;
70
71 local_irq_save(flags);
72 writel(mcr_pack(6, 13), &idd->vma->mcr);
73 result = nic_wait(idd);
74 local_irq_restore(flags);
75
76 udelay(500);
77
78 return result;
79 }
80
81 static void nic_write_bit(struct ioc3_driver_data *idd, int bit)
82 {
83 if (bit)
84 writel(mcr_pack(6, 110), &idd->vma->mcr);
85 else
86 writel(mcr_pack(80, 30), &idd->vma->mcr);
87
88 nic_wait(idd);
89 }
90
91 static unsigned nic_read_byte(struct ioc3_driver_data *idd)
92 {
93 unsigned result = 0;
94 int i;
95
96 for (i = 0; i < 8; i++)
97 result = (result >> 1) | (nic_read_bit(idd) << 7);
98
99 return result;
100 }
101
102 static void nic_write_byte(struct ioc3_driver_data *idd, int byte)
103 {
104 int i, bit;
105
106 for (i = 8; i; i--) {
107 bit = byte & 1;
108 byte >>= 1;
109
110 nic_write_bit(idd, bit);
111 }
112 }
113
114 static unsigned long
115 nic_find(struct ioc3_driver_data *idd, int *last, unsigned long addr)
116 {
117 int a, b, index, disc;
118
119 nic_reset(idd);
120
121 /* Search ROM. */
122 nic_write_byte(idd, 0xF0);
123
124 /* Algorithm from ``Book of iButton Standards''. */
125 for (index = 0, disc = 0; index < 64; index++) {
126 a = nic_read_bit(idd);
127 b = nic_read_bit(idd);
128
129 if (a && b) {
130 printk(KERN_WARNING "IOC3 NIC search failed.\n");
131 *last = 0;
132 return 0;
133 }
134
135 if (!a && !b) {
136 if (index == *last) {
137 addr |= 1UL << index;
138 } else if (index > *last) {
139 addr &= ~(1UL << index);
140 disc = index;
141 } else if ((addr & (1UL << index)) == 0)
142 disc = index;
143 nic_write_bit(idd, (addr>>index)&1);
144 continue;
145 } else {
146 if (a)
147 addr |= 1UL << index;
148 else
149 addr &= ~(1UL << index);
150 nic_write_bit(idd, a);
151 continue;
152 }
153 }
154 *last = disc;
155 return addr;
156 }
157
158 static void nic_addr(struct ioc3_driver_data *idd, unsigned long addr)
159 {
160 int index;
161
162 nic_reset(idd);
163 nic_write_byte(idd, 0xF0);
164 for (index = 0; index < 64; index++) {
165 nic_read_bit(idd);
166 nic_read_bit(idd);
167 nic_write_bit(idd, (addr>>index)&1);
168 }
169 }
170
171 static void crc16_byte(unsigned int *crc, unsigned char db)
172 {
173 int i;
174
175 for(i=0;i<8;i++) {
176 *crc <<= 1;
177 if((db^(*crc>>16)) & 1)
178 *crc ^= 0x8005;
179 db >>= 1;
180 }
181 *crc &= 0xFFFF;
182 }
183
184 static unsigned int crc16_area(unsigned char *dbs, int size, unsigned int crc)
185 {
186 while(size--)
187 crc16_byte(&crc, *(dbs++));
188 return crc;
189 }
190
191 static void crc8_byte(unsigned int *crc, unsigned char db)
192 {
193 int i,f;
194
195 for(i=0;i<8;i++) {
196 f = (*crc ^ db) & 1;
197 *crc >>= 1;
198 db >>= 1;
199 if(f)
200 *crc ^= 0x8c;
201 }
202 *crc &= 0xff;
203 }
204
205 static unsigned int crc8_addr(unsigned long addr)
206 {
207 int i;
208 unsigned int crc = 0x00;
209
210 for(i=0;i<8;i++)
211 crc8_byte(&crc, addr>>(i<<3));
212 return crc;
213 }
214
215 static void
216 read_redir_page(struct ioc3_driver_data *idd, unsigned long addr, int page,
217 unsigned char *redir, unsigned char *data)
218 {
219 int loops = 16, i;
220
221 while(redir[page] != 0xFF) {
222 page = redir[page]^0xFF;
223 loops--;
224 if(loops<0) {
225 printk(KERN_ERR "IOC3: NIC circular redirection\n");
226 return;
227 }
228 }
229 loops = 3;
230 while(loops>0) {
231 nic_addr(idd, addr);
232 nic_write_byte(idd, 0xF0);
233 nic_write_byte(idd, (page << 5) & 0xE0);
234 nic_write_byte(idd, (page >> 3) & 0x1F);
235 for(i=0;i<0x20;i++)
236 data[i] = nic_read_byte(idd);
237 if(crc16_area(data, 0x20, 0x0000) == 0x800d)
238 return;
239 loops--;
240 }
241 printk(KERN_ERR "IOC3: CRC error in data page\n");
242 for(i=0;i<0x20;i++)
243 data[i] = 0x00;
244 }
245
246 static void
247 read_redir_map(struct ioc3_driver_data *idd, unsigned long addr,
248 unsigned char *redir)
249 {
250 int i,j,loops = 3,crc_ok;
251 unsigned int crc;
252
253 while(loops>0) {
254 crc_ok = 1;
255 nic_addr(idd, addr);
256 nic_write_byte(idd, 0xAA);
257 nic_write_byte(idd, 0x00);
258 nic_write_byte(idd, 0x01);
259 for(i=0;i<64;i+=8) {
260 for(j=0;j<8;j++)
261 redir[i+j] = nic_read_byte(idd);
262 crc = crc16_area(redir+i, 8, (i==0)?0x8707:0x0000);
263 crc16_byte(&crc, nic_read_byte(idd));
264 crc16_byte(&crc, nic_read_byte(idd));
265 if(crc != 0x800d)
266 crc_ok = 0;
267 }
268 if(crc_ok)
269 return;
270 loops--;
271 }
272 printk(KERN_ERR "IOC3: CRC error in redirection page\n");
273 for(i=0;i<64;i++)
274 redir[i] = 0xFF;
275 }
276
277 static void read_nic(struct ioc3_driver_data *idd, unsigned long addr)
278 {
279 unsigned char redir[64];
280 unsigned char data[64],part[32];
281 int i,j;
282
283 /* read redirections */
284 read_redir_map(idd, addr, redir);
285 /* read data pages */
286 read_redir_page(idd, addr, 0, redir, data);
287 read_redir_page(idd, addr, 1, redir, data+32);
288 /* assemble the part # */
289 j=0;
290 for(i=0;i<19;i++)
291 if(data[i+11] != ' ')
292 part[j++] = data[i+11];
293 for(i=0;i<6;i++)
294 if(data[i+32] != ' ')
295 part[j++] = data[i+32];
296 part[j] = 0;
297 /* skip Octane power supplies */
298 if(!strncmp(part, "060-0035-", 9))
299 return;
300 if(!strncmp(part, "060-0038-", 9))
301 return;
302 strcpy(idd->nic_part, part);
303 /* assemble the serial # */
304 j=0;
305 for(i=0;i<10;i++)
306 if(data[i+1] != ' ')
307 idd->nic_serial[j++] = data[i+1];
308 idd->nic_serial[j] = 0;
309 }
310
311 static void read_mac(struct ioc3_driver_data *idd, unsigned long addr)
312 {
313 int i, loops = 3;
314 unsigned char data[13];
315
316 while(loops>0) {
317 nic_addr(idd, addr);
318 nic_write_byte(idd, 0xF0);
319 nic_write_byte(idd, 0x00);
320 nic_write_byte(idd, 0x00);
321 nic_read_byte(idd);
322 for(i=0;i<13;i++)
323 data[i] = nic_read_byte(idd);
324 if(crc16_area(data, 13, 0x0000) == 0x800d) {
325 for(i=10;i>4;i--)
326 idd->nic_mac[10-i] = data[i];
327 return;
328 }
329 loops--;
330 }
331 printk(KERN_ERR "IOC3: CRC error in MAC address\n");
332 for(i=0;i<6;i++)
333 idd->nic_mac[i] = 0x00;
334 }
335
336 static void probe_nic(struct ioc3_driver_data *idd)
337 {
338 int save = 0, loops = 3;
339 unsigned long first, addr;
340
341 writel(GPCR_MLAN_EN, &idd->vma->gpcr_s);
342
343 while(loops>0) {
344 idd->nic_part[0] = 0;
345 idd->nic_serial[0] = 0;
346 addr = first = nic_find(idd, &save, 0);
347 if(!first)
348 return;
349 while(1) {
350 if(crc8_addr(addr))
351 break;
352 else {
353 switch(addr & 0xFF) {
354 case 0x0B:
355 read_nic(idd, addr);
356 break;
357 case 0x09:
358 case 0x89:
359 case 0x91:
360 read_mac(idd, addr);
361 break;
362 }
363 }
364 addr = nic_find(idd, &save, addr);
365 if(addr == first)
366 return;
367 }
368 loops--;
369 }
370 printk(KERN_ERR "IOC3: CRC error in NIC address\n");
371 }
372
373 /* Interrupts */
374
375 static void write_ireg(struct ioc3_driver_data *idd, uint32_t val, int which)
376 {
377 unsigned long flags;
378
379 spin_lock_irqsave(&idd->ir_lock, flags);
380 switch (which) {
381 case IOC3_W_IES:
382 writel(val, &idd->vma->sio_ies);
383 break;
384 case IOC3_W_IEC:
385 writel(val, &idd->vma->sio_iec);
386 break;
387 }
388 spin_unlock_irqrestore(&idd->ir_lock, flags);
389 }
390 static inline uint32_t get_pending_intrs(struct ioc3_driver_data *idd)
391 {
392 unsigned long flag;
393 uint32_t intrs = 0;
394
395 spin_lock_irqsave(&idd->ir_lock, flag);
396 intrs = readl(&idd->vma->sio_ir);
397 intrs &= readl(&idd->vma->sio_ies);
398 spin_unlock_irqrestore(&idd->ir_lock, flag);
399 return intrs;
400 }
401
402 static irqreturn_t ioc3_intr_io(int irq, void *arg)
403 {
404 unsigned long flags;
405 struct ioc3_driver_data *idd = arg;
406 int handled = 1, id;
407 unsigned int pending;
408
409 read_lock_irqsave(&ioc3_submodules_lock, flags);
410
411 if(idd->dual_irq && readb(&idd->vma->eisr)) {
412 /* send Ethernet IRQ to the driver */
413 if(ioc3_ethernet && idd->active[ioc3_ethernet->id] &&
414 ioc3_ethernet->intr) {
415 handled = handled && !ioc3_ethernet->intr(ioc3_ethernet,
416 idd, 0);
417 }
418 }
419 pending = get_pending_intrs(idd); /* look at the IO IRQs */
420
421 for(id=0;id<IOC3_MAX_SUBMODULES;id++) {
422 if(idd->active[id] && ioc3_submodules[id]
423 && (pending & ioc3_submodules[id]->irq_mask)
424 && ioc3_submodules[id]->intr) {
425 write_ireg(idd, ioc3_submodules[id]->irq_mask,
426 IOC3_W_IEC);
427 if(!ioc3_submodules[id]->intr(ioc3_submodules[id],
428 idd, pending & ioc3_submodules[id]->irq_mask))
429 pending &= ~ioc3_submodules[id]->irq_mask;
430 if (ioc3_submodules[id]->reset_mask)
431 write_ireg(idd, ioc3_submodules[id]->irq_mask,
432 IOC3_W_IES);
433 }
434 }
435 read_unlock_irqrestore(&ioc3_submodules_lock, flags);
436 if(pending) {
437 printk(KERN_WARNING
438 "IOC3: Pending IRQs 0x%08x discarded and disabled\n",pending);
439 write_ireg(idd, pending, IOC3_W_IEC);
440 handled = 1;
441 }
442 return handled?IRQ_HANDLED:IRQ_NONE;
443 }
444
445 static irqreturn_t ioc3_intr_eth(int irq, void *arg)
446 {
447 unsigned long flags;
448 struct ioc3_driver_data *idd = (struct ioc3_driver_data *)arg;
449 int handled = 1;
450
451 if(!idd->dual_irq)
452 return IRQ_NONE;
453 read_lock_irqsave(&ioc3_submodules_lock, flags);
454 if(ioc3_ethernet && idd->active[ioc3_ethernet->id]
455 && ioc3_ethernet->intr)
456 handled = handled && !ioc3_ethernet->intr(ioc3_ethernet, idd, 0);
457 read_unlock_irqrestore(&ioc3_submodules_lock, flags);
458 return handled?IRQ_HANDLED:IRQ_NONE;
459 }
460
461 void ioc3_enable(struct ioc3_submodule *is,
462 struct ioc3_driver_data *idd, unsigned int irqs)
463 {
464 write_ireg(idd, irqs & is->irq_mask, IOC3_W_IES);
465 }
466
467 void ioc3_ack(struct ioc3_submodule *is, struct ioc3_driver_data *idd,
468 unsigned int irqs)
469 {
470 writel(irqs & is->irq_mask, &idd->vma->sio_ir);
471 }
472
473 void ioc3_disable(struct ioc3_submodule *is,
474 struct ioc3_driver_data *idd, unsigned int irqs)
475 {
476 write_ireg(idd, irqs & is->irq_mask, IOC3_W_IEC);
477 }
478
479 void ioc3_gpcr_set(struct ioc3_driver_data *idd, unsigned int val)
480 {
481 unsigned long flags;
482 spin_lock_irqsave(&idd->gpio_lock, flags);
483 writel(val, &idd->vma->gpcr_s);
484 spin_unlock_irqrestore(&idd->gpio_lock, flags);
485 }
486
487 /* Keep it simple, stupid! */
488 static int find_slot(void **tab, int max)
489 {
490 int i;
491 for(i=0;i<max;i++)
492 if(!(tab[i]))
493 return i;
494 return -1;
495 }
496
497 /* Register an IOC3 submodule */
498 int ioc3_register_submodule(struct ioc3_submodule *is)
499 {
500 struct ioc3_driver_data *idd;
501 int alloc_id;
502 unsigned long flags;
503
504 write_lock_irqsave(&ioc3_submodules_lock, flags);
505 alloc_id = find_slot((void **)ioc3_submodules, IOC3_MAX_SUBMODULES);
506 if(alloc_id != -1) {
507 ioc3_submodules[alloc_id] = is;
508 if(is->ethernet) {
509 if(ioc3_ethernet==NULL)
510 ioc3_ethernet=is;
511 else
512 printk(KERN_WARNING
513 "IOC3 Ethernet module already registered!\n");
514 }
515 }
516 write_unlock_irqrestore(&ioc3_submodules_lock, flags);
517
518 if(alloc_id == -1) {
519 printk(KERN_WARNING "Increase IOC3_MAX_SUBMODULES!\n");
520 return -ENOMEM;
521 }
522
523 is->id=alloc_id;
524
525 /* Initialize submodule for each IOC3 */
526 if (!is->probe)
527 return 0;
528
529 down_read(&ioc3_devices_rwsem);
530 list_for_each_entry(idd, &ioc3_devices, list) {
531 /* set to 1 for IRQs in probe */
532 idd->active[alloc_id] = 1;
533 idd->active[alloc_id] = !is->probe(is, idd);
534 }
535 up_read(&ioc3_devices_rwsem);
536
537 return 0;
538 }
539
540 /* Unregister an IOC3 submodule */
541 void ioc3_unregister_submodule(struct ioc3_submodule *is)
542 {
543 struct ioc3_driver_data *idd;
544 unsigned long flags;
545
546 write_lock_irqsave(&ioc3_submodules_lock, flags);
547 if(ioc3_submodules[is->id]==is)
548 ioc3_submodules[is->id]=NULL;
549 else
550 printk(KERN_WARNING
551 "IOC3 submodule %s has wrong ID.\n",is->name);
552 if(ioc3_ethernet==is)
553 ioc3_ethernet = NULL;
554 write_unlock_irqrestore(&ioc3_submodules_lock, flags);
555
556 /* Remove submodule for each IOC3 */
557 down_read(&ioc3_devices_rwsem);
558 list_for_each_entry(idd, &ioc3_devices, list)
559 if(idd->active[is->id]) {
560 if(is->remove)
561 if(is->remove(is, idd))
562 printk(KERN_WARNING
563 "%s: IOC3 submodule %s remove failed "
564 "for pci_dev %s.\n",
565 __func__, module_name(is->owner),
566 pci_name(idd->pdev));
567 idd->active[is->id] = 0;
568 if(is->irq_mask)
569 write_ireg(idd, is->irq_mask, IOC3_W_IEC);
570 }
571 up_read(&ioc3_devices_rwsem);
572 }
573
574 /*********************
575 * Device management *
576 *********************/
577
578 static char *ioc3_class_names[] = { "unknown", "IP27 BaseIO", "IP30 system",
579 "MENET 1/2/3", "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 __init ioc3_init(void)
819 {
820 if (ia64_platform_is("sn2"))
821 return pci_register_driver(&ioc3_driver);
822 return -ENODEV;
823 }
824
825 /* Module unload */
826 static void __exit 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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