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2d0cfb52
PG		 1/*
2 * SGI IOC3 master driver and IRQ demuxer
3 *
4 * Copyright (c) 2005 Stanislaw Skowronek <[email protected]>
5 * Heavily based on similar work by:
6 * Brent Casavant <[email protected]> - IOC4 master driver
7 * Pat Gefre <[email protected]> - IOC3 serial port IRQ demuxer
8 */
9
2d0cfb52
PG		 10#include <linux/errno.h>
11#include <linux/module.h>
12#include <linux/pci.h>
56b146d3 13#include <linux/dma-mapping.h>
2d0cfb52
PG		 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
22static LIST_HEAD(ioc3_devices);
23static int ioc3_counter;
24static DECLARE_RWSEM(ioc3_devices_rwsem);
25
26static struct ioc3_submodule *ioc3_submodules[IOC3_MAX_SUBMODULES];
27static struct ioc3_submodule *ioc3_ethernet;
34af946a 28static DEFINE_RWLOCK(ioc3_submodules_lock);
2d0cfb52
PG		 29
30/* NIC probing code */
31
32#define GPCR_MLAN_EN 0x00200000 /* enable MCR to pin 8 */
33
34static inline unsigned mcr_pack(unsigned pulse, unsigned sample)
35{
36 return (pulse << 10) | (sample << 2);
37}
38
39static int nic_wait(struct ioc3_driver_data *idd)
40{
d6561010 41 unsigned mcr;
2d0cfb52
PG		 42
43 do {
d6561010 44 mcr = readl(&idd->vma->mcr);
2d0cfb52
PG		 45 } while (!(mcr & 2));
46
47 return mcr & 1;
48}
49
50static int nic_reset(struct ioc3_driver_data *idd)
51{
52 int presence;
53 unsigned long flags;
54
55 local_irq_save(flags);
d6561010 56 writel(mcr_pack(500, 65), &idd->vma->mcr);
2d0cfb52
PG		 57 presence = nic_wait(idd);
58 local_irq_restore(flags);
59
60 udelay(500);
61
62 return presence;
63}
64
15b370c9 65static int nic_read_bit(struct ioc3_driver_data *idd)
2d0cfb52
PG		 66{
67 int result;
68 unsigned long flags;
69
70 local_irq_save(flags);
d6561010 71 writel(mcr_pack(6, 13), &idd->vma->mcr);
2d0cfb52
PG		 72 result = nic_wait(idd);
73 local_irq_restore(flags);
74
75 udelay(500);
76
77 return result;
78}
79
15b370c9 80static void nic_write_bit(struct ioc3_driver_data *idd, int bit)
2d0cfb52
PG		 81{
82 if (bit)
d6561010 83 writel(mcr_pack(6, 110), &idd->vma->mcr);
2d0cfb52 84 else
d6561010 85 writel(mcr_pack(80, 30), &idd->vma->mcr);
2d0cfb52
PG		 86
87 nic_wait(idd);
88}
89
90static 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
101static 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
113static unsigned long
114nic_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
157static 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
170static 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
183static 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
190static 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
204static 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
214static void
215read_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
245static void
246read_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
276static 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
310static 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
335static void probe_nic(struct ioc3_driver_data *idd)
336{
337 int save = 0, loops = 3;
338 unsigned long first, addr;
339
d6561010 340 writel(GPCR_MLAN_EN, &idd->vma->gpcr_s);
2d0cfb52
PG		 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
15b370c9 374static void write_ireg(struct ioc3_driver_data *idd, uint32_t val, int which)
2d0cfb52
PG		 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}
389static 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
401static irqreturn_t ioc3_intr_io(int irq, void *arg, struct pt_regs *regs)
402{
403 unsigned long flags;
404 struct ioc3_driver_data *idd = (struct ioc3_driver_data *)arg;
405 int handled = 1, id;
406 unsigned int pending;
407
408 read_lock_irqsave(&ioc3_submodules_lock, flags);
409
d6561010 410 if(idd->dual_irq && readb(&idd->vma->eisr)) {
2d0cfb52
PG		 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, regs);
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 regs))
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
445static irqreturn_t ioc3_intr_eth(int irq, void *arg, struct pt_regs *regs)
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 regs);
458 read_unlock_irqrestore(&ioc3_submodules_lock, flags);
459 return handled?IRQ_HANDLED:IRQ_NONE;
460}
461
462void ioc3_enable(struct ioc3_submodule *is,
463 struct ioc3_driver_data *idd, unsigned int irqs)
464{
465 write_ireg(idd, irqs & is->irq_mask, IOC3_W_IES);
466}
467
468void ioc3_ack(struct ioc3_submodule *is, struct ioc3_driver_data *idd,
469 unsigned int irqs)
470{
471 writel(irqs & is->irq_mask, &idd->vma->sio_ir);
472}
473
474void ioc3_disable(struct ioc3_submodule *is,
475 struct ioc3_driver_data *idd, unsigned int irqs)
476{
477 write_ireg(idd, irqs & is->irq_mask, IOC3_W_IEC);
478}
479
480void ioc3_gpcr_set(struct ioc3_driver_data *idd, unsigned int val)
481{
482 unsigned long flags;
483 spin_lock_irqsave(&idd->gpio_lock, flags);
484 writel(val, &idd->vma->gpcr_s);
485 spin_unlock_irqrestore(&idd->gpio_lock, flags);
486}
487
488/* Keep it simple, stupid! */
489static int find_slot(void **tab, int max)
490{
491 int i;
492 for(i=0;i<max;i++)
493 if(!(tab[i]))
494 return i;
495 return -1;
496}
497
498/* Register an IOC3 submodule */
499int ioc3_register_submodule(struct ioc3_submodule *is)
500{
501 struct ioc3_driver_data *idd;
502 int alloc_id;
503 unsigned long flags;
504
505 write_lock_irqsave(&ioc3_submodules_lock, flags);
506 alloc_id = find_slot((void **)ioc3_submodules, IOC3_MAX_SUBMODULES);
507 if(alloc_id != -1) {
508 ioc3_submodules[alloc_id] = is;
509 if(is->ethernet) {
510 if(ioc3_ethernet==NULL)
511 ioc3_ethernet=is;
512 else
513 printk(KERN_WARNING
514 "IOC3 Ethernet module already registered!\n");
515 }
516 }
517 write_unlock_irqrestore(&ioc3_submodules_lock, flags);
518
519 if(alloc_id == -1) {
520 printk(KERN_WARNING "Increase IOC3_MAX_SUBMODULES!\n");
521 return -ENOMEM;
522 }
523
524 is->id=alloc_id;
525
526 /* Initialize submodule for each IOC3 */
527 if (!is->probe)
528 return 0;
529
530 down_read(&ioc3_devices_rwsem);
531 list_for_each_entry(idd, &ioc3_devices, list) {
532 /* set to 1 for IRQs in probe */
533 idd->active[alloc_id] = 1;
534 idd->active[alloc_id] = !is->probe(is, idd);
535 }
536 up_read(&ioc3_devices_rwsem);
537
538 return 0;
539}
540
541/* Unregister an IOC3 submodule */
542void ioc3_unregister_submodule(struct ioc3_submodule *is)
543{
544 struct ioc3_driver_data *idd;
545 unsigned long flags;
546
547 write_lock_irqsave(&ioc3_submodules_lock, flags);
548 if(ioc3_submodules[is->id]==is)
549 ioc3_submodules[is->id]=NULL;
550 else
551 printk(KERN_WARNING
552 "IOC3 submodule %s has wrong ID.\n",is->name);
553 if(ioc3_ethernet==is)
554 ioc3_ethernet = NULL;
555 write_unlock_irqrestore(&ioc3_submodules_lock, flags);
556
557 /* Remove submodule for each IOC3 */
558 down_read(&ioc3_devices_rwsem);
559 list_for_each_entry(idd, &ioc3_devices, list)
560 if(idd->active[is->id]) {
561 if(is->remove)
562 if(is->remove(is, idd))
563 printk(KERN_WARNING
564 "%s: IOC3 submodule %s remove failed "
565 "for pci_dev %s.\n",
566 __FUNCTION__, module_name(is->owner),
567 pci_name(idd->pdev));
568 idd->active[is->id] = 0;
569 if(is->irq_mask)
570 write_ireg(idd, is->irq_mask, IOC3_W_IEC);
571 }
572 up_read(&ioc3_devices_rwsem);
573}
574
575/*********************
576 * Device management *
577 *********************/
578
579static char *
580ioc3_class_names[]={"unknown", "IP27 BaseIO", "IP30 system", "MENET 1/2/3",
581 "MENET 4", "CADduo", "Altix Serial"};
582
583static int ioc3_class(struct ioc3_driver_data *idd)
584{
585 int res = IOC3_CLASS_NONE;
586 /* NIC-based logic */
587 if(!strncmp(idd->nic_part, "030-0891-", 9))
588 res = IOC3_CLASS_BASE_IP30;
589 if(!strncmp(idd->nic_part, "030-1155-", 9))
590 res = IOC3_CLASS_CADDUO;
591 if(!strncmp(idd->nic_part, "030-1657-", 9))
592 res = IOC3_CLASS_SERIAL;
593 if(!strncmp(idd->nic_part, "030-1664-", 9))
594 res = IOC3_CLASS_SERIAL;
595 /* total random heuristics */
596#ifdef CONFIG_SGI_IP27
597 if(!idd->nic_part[0])
598 res = IOC3_CLASS_BASE_IP27;
599#endif
600 /* print educational message */
601 printk(KERN_INFO "IOC3 part: [%s], serial: [%s] => class %s\n",
602 idd->nic_part, idd->nic_serial, ioc3_class_names[res]);
603 return res;
604}
605/* Adds a new instance of an IOC3 card */
606static int ioc3_probe(struct pci_dev *pdev, const struct pci_device_id *pci_id)
607{
608 struct ioc3_driver_data *idd;
609 uint32_t pcmd;
610 int ret, id;
611
612 /* Enable IOC3 and take ownership of it */
613 if ((ret = pci_enable_device(pdev))) {
614 printk(KERN_WARNING
615 "%s: Failed to enable IOC3 device for pci_dev %s.\n",
616 __FUNCTION__, pci_name(pdev));
617 goto out;
618 }
619 pci_set_master(pdev);
620
621#ifdef USE_64BIT_DMA
56b146d3 622 ret = pci_set_dma_mask(pdev, DMA_64BIT_MASK);
2d0cfb52 623 if (!ret) {
56b146d3 624 ret = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK);
2d0cfb52
PG		 625 if (ret < 0) {
626 printk(KERN_WARNING "%s: Unable to obtain 64 bit DMA "
627 "for consistent allocations\n",
628 __FUNCTION__);
629 }
630 }
631#endif
632
633 /* Set up per-IOC3 data */
634 idd = kmalloc(sizeof(struct ioc3_driver_data), GFP_KERNEL);
635 if (!idd) {
636 printk(KERN_WARNING
637 "%s: Failed to allocate IOC3 data for pci_dev %s.\n",
638 __FUNCTION__, pci_name(pdev));
639 ret = -ENODEV;
640 goto out_idd;
641 }
642 memset(idd, 0, sizeof(struct ioc3_driver_data));
643 spin_lock_init(&idd->ir_lock);
644 spin_lock_init(&idd->gpio_lock);
645 idd->pdev = pdev;
646
647 /* Map all IOC3 registers. These are shared between subdevices
648 * so the main IOC3 module manages them.
649 */
650 idd->pma = pci_resource_start(pdev, 0);
651 if (!idd->pma) {
652 printk(KERN_WARNING
653 "%s: Unable to find IOC3 resource "
654 "for pci_dev %s.\n",
655 __FUNCTION__, pci_name(pdev));
656 ret = -ENODEV;
657 goto out_pci;
658 }
659 if (!request_region(idd->pma, IOC3_PCI_SIZE, "ioc3")) {
660 printk(KERN_WARNING
661 "%s: Unable to request IOC3 region "
662 "for pci_dev %s.\n",
663 __FUNCTION__, pci_name(pdev));
664 ret = -ENODEV;
665 goto out_pci;
666 }
667 idd->vma = ioremap(idd->pma, IOC3_PCI_SIZE);
668 if (!idd->vma) {
669 printk(KERN_WARNING
670 "%s: Unable to remap IOC3 region "
671 "for pci_dev %s.\n",
672 __FUNCTION__, pci_name(pdev));
673 ret = -ENODEV;
674 goto out_misc_region;
675 }
676
677 /* Track PCI-device specific data */
678 pci_set_drvdata(pdev, idd);
679 down_write(&ioc3_devices_rwsem);
2c43630f 680 list_add_tail(&idd->list, &ioc3_devices);
2d0cfb52
PG		 681 idd->id = ioc3_counter++;
682 up_write(&ioc3_devices_rwsem);
683
d6561010 684 idd->gpdr_shadow = readl(&idd->vma->gpdr);
2d0cfb52
PG		 685
686 /* Read IOC3 NIC contents */
687 probe_nic(idd);
688
689 /* Detect IOC3 class */
690 idd->class = ioc3_class(idd);
691
692 /* Initialize IOC3 */
693 pci_read_config_dword(pdev, PCI_COMMAND, &pcmd);
694 pci_write_config_dword(pdev, PCI_COMMAND,
695 pcmd | PCI_COMMAND_MEMORY |
696 PCI_COMMAND_PARITY | PCI_COMMAND_SERR |
697 PCI_SCR_DROP_MODE_EN);
698
699 write_ireg(idd, ~0, IOC3_W_IEC);
700 writel(~0, &idd->vma->sio_ir);
701
702 /* Set up IRQs */
703 if(idd->class == IOC3_CLASS_BASE_IP30
704 || idd->class == IOC3_CLASS_BASE_IP27) {
705 writel(0, &idd->vma->eier);
706 writel(~0, &idd->vma->eisr);
707
708 idd->dual_irq = 1;
dace1453 709 if (!request_irq(pdev->irq, ioc3_intr_eth, IRQF_SHARED,
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PG		 710 "ioc3-eth", (void *)idd)) {
711 idd->irq_eth = pdev->irq;
712 } else {
713 printk(KERN_WARNING
714 "%s : request_irq fails for IRQ 0x%x\n ",
715 __FUNCTION__, pdev->irq);
716 }
dace1453 717 if (!request_irq(pdev->irq+2, ioc3_intr_io, IRQF_SHARED,
2d0cfb52
PG		 718 "ioc3-io", (void *)idd)) {
719 idd->irq_io = pdev->irq+2;
720 } else {
721 printk(KERN_WARNING
722 "%s : request_irq fails for IRQ 0x%x\n ",
723 __FUNCTION__, pdev->irq+2);
724 }
725 } else {
dace1453 726 if (!request_irq(pdev->irq, ioc3_intr_io, IRQF_SHARED,
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PG		 727 "ioc3", (void *)idd)) {
728 idd->irq_io = pdev->irq;
729 } else {
730 printk(KERN_WARNING
731 "%s : request_irq fails for IRQ 0x%x\n ",
732 __FUNCTION__, pdev->irq);
733 }
734 }
735
736 /* Add this IOC3 to all submodules */
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PG		 737 for(id=0;id<IOC3_MAX_SUBMODULES;id++)
738 if(ioc3_submodules[id] && ioc3_submodules[id]->probe) {
739 idd->active[id] = 1;
740 idd->active[id] = !ioc3_submodules[id]->probe
741 (ioc3_submodules[id], idd);
742 }
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PG		 743
744 printk(KERN_INFO "IOC3 Master Driver loaded for %s\n", pci_name(pdev));
745
746 return 0;
747
748out_misc_region:
749 release_region(idd->pma, IOC3_PCI_SIZE);
750out_pci:
751 kfree(idd);
752out_idd:
753 pci_disable_device(pdev);
754out:
755 return ret;
756}
757
758/* Removes a particular instance of an IOC3 card. */
759static void ioc3_remove(struct pci_dev *pdev)
760{
761 int id;
762 struct ioc3_driver_data *idd;
763
764 idd = pci_get_drvdata(pdev);
765
766 /* Remove this IOC3 from all submodules */
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PG		 767 for(id=0;id<IOC3_MAX_SUBMODULES;id++)
768 if(idd->active[id]) {
769 if(ioc3_submodules[id] && ioc3_submodules[id]->remove)
770 if(ioc3_submodules[id]->remove(ioc3_submodules[id],
771 idd))
772 printk(KERN_WARNING
773 "%s: IOC3 submodule 0x%s remove failed "
774 "for pci_dev %s.\n",
775 __FUNCTION__,
776 module_name(ioc3_submodules[id]->owner),
777 pci_name(pdev));
778 idd->active[id] = 0;
779 }
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PG		 780
781 /* Clear and disable all IRQs */
782 write_ireg(idd, ~0, IOC3_W_IEC);
783 writel(~0, &idd->vma->sio_ir);
784
785 /* Release resources */
786 free_irq(idd->irq_io, (void *)idd);
787 if(idd->dual_irq)
788 free_irq(idd->irq_eth, (void *)idd);
789 iounmap(idd->vma);
790 release_region(idd->pma, IOC3_PCI_SIZE);
791
792 /* Disable IOC3 and relinquish */
793 pci_disable_device(pdev);
794
795 /* Remove and free driver data */
796 down_write(&ioc3_devices_rwsem);
797 list_del(&idd->list);
798 up_write(&ioc3_devices_rwsem);
799 kfree(idd);
800}
801
802static struct pci_device_id ioc3_id_table[] = {
803 {PCI_VENDOR_ID_SGI, PCI_DEVICE_ID_SGI_IOC3, PCI_ANY_ID, PCI_ANY_ID},
804 {0}
805};
806
807static struct pci_driver ioc3_driver = {
808 .name = "IOC3",
809 .id_table = ioc3_id_table,
810 .probe = ioc3_probe,
811 .remove = ioc3_remove,
812};
813
814MODULE_DEVICE_TABLE(pci, ioc3_id_table);
815
816/*********************
817 * Module management *
818 *********************/
819
820/* Module load */
821static int __devinit ioc3_init(void)
822{
823 if (ia64_platform_is("sn2"))
824 return pci_register_driver(&ioc3_driver);
825 return 0;
826}
827
828/* Module unload */
829static void __devexit ioc3_exit(void)
830{
831 pci_unregister_driver(&ioc3_driver);
832}
833
834module_init(ioc3_init);
835module_exit(ioc3_exit);
836
837MODULE_AUTHOR("Stanislaw Skowronek <[email protected]>");
838MODULE_DESCRIPTION("PCI driver for SGI IOC3");
839MODULE_LICENSE("GPL");
840
53d8be5c
PG		 841EXPORT_SYMBOL_GPL(ioc3_register_submodule);
842EXPORT_SYMBOL_GPL(ioc3_unregister_submodule);
843EXPORT_SYMBOL_GPL(ioc3_ack);
844EXPORT_SYMBOL_GPL(ioc3_gpcr_set);
845EXPORT_SYMBOL_GPL(ioc3_disable);
846EXPORT_SYMBOL_GPL(ioc3_enable);
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