blob: ed946311d3a47e3120185e909eeb9524185cf4bc [file] [log] [blame]
Patrick Gefre2d0cfb52006-01-14 13:20:40 -08001/*
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/config.h>
11#include <linux/errno.h>
12#include <linux/module.h>
13#include <linux/pci.h>
Tobias Klauser56b146d2006-04-10 22:54:21 -070014#include <linux/dma-mapping.h>
Patrick Gefre2d0cfb52006-01-14 13:20:40 -080015#include <linux/interrupt.h>
16#include <linux/spinlock.h>
17#include <linux/delay.h>
18#include <linux/ioc3.h>
19#include <linux/rwsem.h>
20
21#define IOC3_PCI_SIZE 0x100000
22
23static LIST_HEAD(ioc3_devices);
24static int ioc3_counter;
25static DECLARE_RWSEM(ioc3_devices_rwsem);
26
27static struct ioc3_submodule *ioc3_submodules[IOC3_MAX_SUBMODULES];
28static struct ioc3_submodule *ioc3_ethernet;
Ingo Molnar34af9462006-06-27 02:53:55 -070029static DEFINE_RWLOCK(ioc3_submodules_lock);
Patrick Gefre2d0cfb52006-01-14 13:20:40 -080030
31/* NIC probing code */
32
33#define GPCR_MLAN_EN 0x00200000 /* enable MCR to pin 8 */
34
35static inline unsigned mcr_pack(unsigned pulse, unsigned sample)
36{
37 return (pulse << 10) | (sample << 2);
38}
39
40static int nic_wait(struct ioc3_driver_data *idd)
41{
Al Virod6561012006-02-01 05:59:06 -050042 unsigned mcr;
Patrick Gefre2d0cfb52006-01-14 13:20:40 -080043
44 do {
Al Virod6561012006-02-01 05:59:06 -050045 mcr = readl(&idd->vma->mcr);
Patrick Gefre2d0cfb52006-01-14 13:20:40 -080046 } while (!(mcr & 2));
47
48 return mcr & 1;
49}
50
51static int nic_reset(struct ioc3_driver_data *idd)
52{
53 int presence;
54 unsigned long flags;
55
56 local_irq_save(flags);
Al Virod6561012006-02-01 05:59:06 -050057 writel(mcr_pack(500, 65), &idd->vma->mcr);
Patrick Gefre2d0cfb52006-01-14 13:20:40 -080058 presence = nic_wait(idd);
59 local_irq_restore(flags);
60
61 udelay(500);
62
63 return presence;
64}
65
Pat Gefre15b370c2006-02-28 16:59:09 -080066static int nic_read_bit(struct ioc3_driver_data *idd)
Patrick Gefre2d0cfb52006-01-14 13:20:40 -080067{
68 int result;
69 unsigned long flags;
70
71 local_irq_save(flags);
Al Virod6561012006-02-01 05:59:06 -050072 writel(mcr_pack(6, 13), &idd->vma->mcr);
Patrick Gefre2d0cfb52006-01-14 13:20:40 -080073 result = nic_wait(idd);
74 local_irq_restore(flags);
75
76 udelay(500);
77
78 return result;
79}
80
Pat Gefre15b370c2006-02-28 16:59:09 -080081static void nic_write_bit(struct ioc3_driver_data *idd, int bit)
Patrick Gefre2d0cfb52006-01-14 13:20:40 -080082{
83 if (bit)
Al Virod6561012006-02-01 05:59:06 -050084 writel(mcr_pack(6, 110), &idd->vma->mcr);
Patrick Gefre2d0cfb52006-01-14 13:20:40 -080085 else
Al Virod6561012006-02-01 05:59:06 -050086 writel(mcr_pack(80, 30), &idd->vma->mcr);
Patrick Gefre2d0cfb52006-01-14 13:20:40 -080087
88 nic_wait(idd);
89}
90
91static 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
102static 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
114static unsigned long
115nic_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
158static 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
171static 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
184static 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
191static 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
205static 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
215static void
216read_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
246static void
247read_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
277static 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
311static 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
336static void probe_nic(struct ioc3_driver_data *idd)
337{
338 int save = 0, loops = 3;
339 unsigned long first, addr;
340
Al Virod6561012006-02-01 05:59:06 -0500341 writel(GPCR_MLAN_EN, &idd->vma->gpcr_s);
Patrick Gefre2d0cfb52006-01-14 13:20:40 -0800342
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
Pat Gefre15b370c2006-02-28 16:59:09 -0800375static void write_ireg(struct ioc3_driver_data *idd, uint32_t val, int which)
Patrick Gefre2d0cfb52006-01-14 13:20:40 -0800376{
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}
390static 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
402static irqreturn_t ioc3_intr_io(int irq, void *arg, struct pt_regs *regs)
403{
404 unsigned long flags;
405 struct ioc3_driver_data *idd = (struct ioc3_driver_data *)arg;
406 int handled = 1, id;
407 unsigned int pending;
408
409 read_lock_irqsave(&ioc3_submodules_lock, flags);
410
Al Virod6561012006-02-01 05:59:06 -0500411 if(idd->dual_irq && readb(&idd->vma->eisr)) {
Patrick Gefre2d0cfb52006-01-14 13:20:40 -0800412 /* 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, regs);
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 regs))
430 pending &= ~ioc3_submodules[id]->irq_mask;
431 if (ioc3_submodules[id]->reset_mask)
432 write_ireg(idd, ioc3_submodules[id]->irq_mask,
433 IOC3_W_IES);
434 }
435 }
436 read_unlock_irqrestore(&ioc3_submodules_lock, flags);
437 if(pending) {
438 printk(KERN_WARNING
439 "IOC3: Pending IRQs 0x%08x discarded and disabled\n",pending);
440 write_ireg(idd, pending, IOC3_W_IEC);
441 handled = 1;
442 }
443 return handled?IRQ_HANDLED:IRQ_NONE;
444}
445
446static irqreturn_t ioc3_intr_eth(int irq, void *arg, struct pt_regs *regs)
447{
448 unsigned long flags;
449 struct ioc3_driver_data *idd = (struct ioc3_driver_data *)arg;
450 int handled = 1;
451
452 if(!idd->dual_irq)
453 return IRQ_NONE;
454 read_lock_irqsave(&ioc3_submodules_lock, flags);
455 if(ioc3_ethernet && idd->active[ioc3_ethernet->id]
456 && ioc3_ethernet->intr)
457 handled = handled && !ioc3_ethernet->intr(ioc3_ethernet, idd, 0,
458 regs);
459 read_unlock_irqrestore(&ioc3_submodules_lock, flags);
460 return handled?IRQ_HANDLED:IRQ_NONE;
461}
462
463void ioc3_enable(struct ioc3_submodule *is,
464 struct ioc3_driver_data *idd, unsigned int irqs)
465{
466 write_ireg(idd, irqs & is->irq_mask, IOC3_W_IES);
467}
468
469void ioc3_ack(struct ioc3_submodule *is, struct ioc3_driver_data *idd,
470 unsigned int irqs)
471{
472 writel(irqs & is->irq_mask, &idd->vma->sio_ir);
473}
474
475void ioc3_disable(struct ioc3_submodule *is,
476 struct ioc3_driver_data *idd, unsigned int irqs)
477{
478 write_ireg(idd, irqs & is->irq_mask, IOC3_W_IEC);
479}
480
481void ioc3_gpcr_set(struct ioc3_driver_data *idd, unsigned int val)
482{
483 unsigned long flags;
484 spin_lock_irqsave(&idd->gpio_lock, flags);
485 writel(val, &idd->vma->gpcr_s);
486 spin_unlock_irqrestore(&idd->gpio_lock, flags);
487}
488
489/* Keep it simple, stupid! */
490static int find_slot(void **tab, int max)
491{
492 int i;
493 for(i=0;i<max;i++)
494 if(!(tab[i]))
495 return i;
496 return -1;
497}
498
499/* Register an IOC3 submodule */
500int ioc3_register_submodule(struct ioc3_submodule *is)
501{
502 struct ioc3_driver_data *idd;
503 int alloc_id;
504 unsigned long flags;
505
506 write_lock_irqsave(&ioc3_submodules_lock, flags);
507 alloc_id = find_slot((void **)ioc3_submodules, IOC3_MAX_SUBMODULES);
508 if(alloc_id != -1) {
509 ioc3_submodules[alloc_id] = is;
510 if(is->ethernet) {
511 if(ioc3_ethernet==NULL)
512 ioc3_ethernet=is;
513 else
514 printk(KERN_WARNING
515 "IOC3 Ethernet module already registered!\n");
516 }
517 }
518 write_unlock_irqrestore(&ioc3_submodules_lock, flags);
519
520 if(alloc_id == -1) {
521 printk(KERN_WARNING "Increase IOC3_MAX_SUBMODULES!\n");
522 return -ENOMEM;
523 }
524
525 is->id=alloc_id;
526
527 /* Initialize submodule for each IOC3 */
528 if (!is->probe)
529 return 0;
530
531 down_read(&ioc3_devices_rwsem);
532 list_for_each_entry(idd, &ioc3_devices, list) {
533 /* set to 1 for IRQs in probe */
534 idd->active[alloc_id] = 1;
535 idd->active[alloc_id] = !is->probe(is, idd);
536 }
537 up_read(&ioc3_devices_rwsem);
538
539 return 0;
540}
541
542/* Unregister an IOC3 submodule */
543void ioc3_unregister_submodule(struct ioc3_submodule *is)
544{
545 struct ioc3_driver_data *idd;
546 unsigned long flags;
547
548 write_lock_irqsave(&ioc3_submodules_lock, flags);
549 if(ioc3_submodules[is->id]==is)
550 ioc3_submodules[is->id]=NULL;
551 else
552 printk(KERN_WARNING
553 "IOC3 submodule %s has wrong ID.\n",is->name);
554 if(ioc3_ethernet==is)
555 ioc3_ethernet = NULL;
556 write_unlock_irqrestore(&ioc3_submodules_lock, flags);
557
558 /* Remove submodule for each IOC3 */
559 down_read(&ioc3_devices_rwsem);
560 list_for_each_entry(idd, &ioc3_devices, list)
561 if(idd->active[is->id]) {
562 if(is->remove)
563 if(is->remove(is, idd))
564 printk(KERN_WARNING
565 "%s: IOC3 submodule %s remove failed "
566 "for pci_dev %s.\n",
567 __FUNCTION__, module_name(is->owner),
568 pci_name(idd->pdev));
569 idd->active[is->id] = 0;
570 if(is->irq_mask)
571 write_ireg(idd, is->irq_mask, IOC3_W_IEC);
572 }
573 up_read(&ioc3_devices_rwsem);
574}
575
576/*********************
577 * Device management *
578 *********************/
579
580static char *
581ioc3_class_names[]={"unknown", "IP27 BaseIO", "IP30 system", "MENET 1/2/3",
582 "MENET 4", "CADduo", "Altix Serial"};
583
584static int ioc3_class(struct ioc3_driver_data *idd)
585{
586 int res = IOC3_CLASS_NONE;
587 /* NIC-based logic */
588 if(!strncmp(idd->nic_part, "030-0891-", 9))
589 res = IOC3_CLASS_BASE_IP30;
590 if(!strncmp(idd->nic_part, "030-1155-", 9))
591 res = IOC3_CLASS_CADDUO;
592 if(!strncmp(idd->nic_part, "030-1657-", 9))
593 res = IOC3_CLASS_SERIAL;
594 if(!strncmp(idd->nic_part, "030-1664-", 9))
595 res = IOC3_CLASS_SERIAL;
596 /* total random heuristics */
597#ifdef CONFIG_SGI_IP27
598 if(!idd->nic_part[0])
599 res = IOC3_CLASS_BASE_IP27;
600#endif
601 /* print educational message */
602 printk(KERN_INFO "IOC3 part: [%s], serial: [%s] => class %s\n",
603 idd->nic_part, idd->nic_serial, ioc3_class_names[res]);
604 return res;
605}
606/* Adds a new instance of an IOC3 card */
607static int ioc3_probe(struct pci_dev *pdev, const struct pci_device_id *pci_id)
608{
609 struct ioc3_driver_data *idd;
610 uint32_t pcmd;
611 int ret, id;
612
613 /* Enable IOC3 and take ownership of it */
614 if ((ret = pci_enable_device(pdev))) {
615 printk(KERN_WARNING
616 "%s: Failed to enable IOC3 device for pci_dev %s.\n",
617 __FUNCTION__, pci_name(pdev));
618 goto out;
619 }
620 pci_set_master(pdev);
621
622#ifdef USE_64BIT_DMA
Tobias Klauser56b146d2006-04-10 22:54:21 -0700623 ret = pci_set_dma_mask(pdev, DMA_64BIT_MASK);
Patrick Gefre2d0cfb52006-01-14 13:20:40 -0800624 if (!ret) {
Tobias Klauser56b146d2006-04-10 22:54:21 -0700625 ret = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK);
Patrick Gefre2d0cfb52006-01-14 13:20:40 -0800626 if (ret < 0) {
627 printk(KERN_WARNING "%s: Unable to obtain 64 bit DMA "
628 "for consistent allocations\n",
629 __FUNCTION__);
630 }
631 }
632#endif
633
634 /* Set up per-IOC3 data */
635 idd = kmalloc(sizeof(struct ioc3_driver_data), GFP_KERNEL);
636 if (!idd) {
637 printk(KERN_WARNING
638 "%s: Failed to allocate IOC3 data for pci_dev %s.\n",
639 __FUNCTION__, pci_name(pdev));
640 ret = -ENODEV;
641 goto out_idd;
642 }
643 memset(idd, 0, sizeof(struct ioc3_driver_data));
644 spin_lock_init(&idd->ir_lock);
645 spin_lock_init(&idd->gpio_lock);
646 idd->pdev = pdev;
647
648 /* Map all IOC3 registers. These are shared between subdevices
649 * so the main IOC3 module manages them.
650 */
651 idd->pma = pci_resource_start(pdev, 0);
652 if (!idd->pma) {
653 printk(KERN_WARNING
654 "%s: Unable to find IOC3 resource "
655 "for pci_dev %s.\n",
656 __FUNCTION__, pci_name(pdev));
657 ret = -ENODEV;
658 goto out_pci;
659 }
660 if (!request_region(idd->pma, IOC3_PCI_SIZE, "ioc3")) {
661 printk(KERN_WARNING
662 "%s: Unable to request IOC3 region "
663 "for pci_dev %s.\n",
664 __FUNCTION__, pci_name(pdev));
665 ret = -ENODEV;
666 goto out_pci;
667 }
668 idd->vma = ioremap(idd->pma, IOC3_PCI_SIZE);
669 if (!idd->vma) {
670 printk(KERN_WARNING
671 "%s: Unable to remap IOC3 region "
672 "for pci_dev %s.\n",
673 __FUNCTION__, pci_name(pdev));
674 ret = -ENODEV;
675 goto out_misc_region;
676 }
677
678 /* Track PCI-device specific data */
679 pci_set_drvdata(pdev, idd);
680 down_write(&ioc3_devices_rwsem);
Pat Gefre2c436302006-05-01 12:16:08 -0700681 list_add_tail(&idd->list, &ioc3_devices);
Patrick Gefre2d0cfb52006-01-14 13:20:40 -0800682 idd->id = ioc3_counter++;
683 up_write(&ioc3_devices_rwsem);
684
Al Virod6561012006-02-01 05:59:06 -0500685 idd->gpdr_shadow = readl(&idd->vma->gpdr);
Patrick Gefre2d0cfb52006-01-14 13:20:40 -0800686
687 /* Read IOC3 NIC contents */
688 probe_nic(idd);
689
690 /* Detect IOC3 class */
691 idd->class = ioc3_class(idd);
692
693 /* Initialize IOC3 */
694 pci_read_config_dword(pdev, PCI_COMMAND, &pcmd);
695 pci_write_config_dword(pdev, PCI_COMMAND,
696 pcmd | PCI_COMMAND_MEMORY |
697 PCI_COMMAND_PARITY | PCI_COMMAND_SERR |
698 PCI_SCR_DROP_MODE_EN);
699
700 write_ireg(idd, ~0, IOC3_W_IEC);
701 writel(~0, &idd->vma->sio_ir);
702
703 /* Set up IRQs */
704 if(idd->class == IOC3_CLASS_BASE_IP30
705 || idd->class == IOC3_CLASS_BASE_IP27) {
706 writel(0, &idd->vma->eier);
707 writel(~0, &idd->vma->eisr);
708
709 idd->dual_irq = 1;
710 if (!request_irq(pdev->irq, ioc3_intr_eth, SA_SHIRQ,
711 "ioc3-eth", (void *)idd)) {
712 idd->irq_eth = pdev->irq;
713 } else {
714 printk(KERN_WARNING
715 "%s : request_irq fails for IRQ 0x%x\n ",
716 __FUNCTION__, pdev->irq);
717 }
718 if (!request_irq(pdev->irq+2, ioc3_intr_io, SA_SHIRQ,
719 "ioc3-io", (void *)idd)) {
720 idd->irq_io = pdev->irq+2;
721 } else {
722 printk(KERN_WARNING
723 "%s : request_irq fails for IRQ 0x%x\n ",
724 __FUNCTION__, pdev->irq+2);
725 }
726 } else {
727 if (!request_irq(pdev->irq, ioc3_intr_io, SA_SHIRQ,
728 "ioc3", (void *)idd)) {
729 idd->irq_io = pdev->irq;
730 } else {
731 printk(KERN_WARNING
732 "%s : request_irq fails for IRQ 0x%x\n ",
733 __FUNCTION__, pdev->irq);
734 }
735 }
736
737 /* Add this IOC3 to all submodules */
Patrick Gefre2d0cfb52006-01-14 13:20:40 -0800738 for(id=0;id<IOC3_MAX_SUBMODULES;id++)
739 if(ioc3_submodules[id] && ioc3_submodules[id]->probe) {
740 idd->active[id] = 1;
741 idd->active[id] = !ioc3_submodules[id]->probe
742 (ioc3_submodules[id], idd);
743 }
Patrick Gefre2d0cfb52006-01-14 13:20:40 -0800744
745 printk(KERN_INFO "IOC3 Master Driver loaded for %s\n", pci_name(pdev));
746
747 return 0;
748
749out_misc_region:
750 release_region(idd->pma, IOC3_PCI_SIZE);
751out_pci:
752 kfree(idd);
753out_idd:
754 pci_disable_device(pdev);
755out:
756 return ret;
757}
758
759/* Removes a particular instance of an IOC3 card. */
760static void ioc3_remove(struct pci_dev *pdev)
761{
762 int id;
763 struct ioc3_driver_data *idd;
764
765 idd = pci_get_drvdata(pdev);
766
767 /* Remove this IOC3 from all submodules */
Patrick Gefre2d0cfb52006-01-14 13:20:40 -0800768 for(id=0;id<IOC3_MAX_SUBMODULES;id++)
769 if(idd->active[id]) {
770 if(ioc3_submodules[id] && ioc3_submodules[id]->remove)
771 if(ioc3_submodules[id]->remove(ioc3_submodules[id],
772 idd))
773 printk(KERN_WARNING
774 "%s: IOC3 submodule 0x%s remove failed "
775 "for pci_dev %s.\n",
776 __FUNCTION__,
777 module_name(ioc3_submodules[id]->owner),
778 pci_name(pdev));
779 idd->active[id] = 0;
780 }
Patrick Gefre2d0cfb52006-01-14 13:20:40 -0800781
782 /* Clear and disable all IRQs */
783 write_ireg(idd, ~0, IOC3_W_IEC);
784 writel(~0, &idd->vma->sio_ir);
785
786 /* Release resources */
787 free_irq(idd->irq_io, (void *)idd);
788 if(idd->dual_irq)
789 free_irq(idd->irq_eth, (void *)idd);
790 iounmap(idd->vma);
791 release_region(idd->pma, IOC3_PCI_SIZE);
792
793 /* Disable IOC3 and relinquish */
794 pci_disable_device(pdev);
795
796 /* Remove and free driver data */
797 down_write(&ioc3_devices_rwsem);
798 list_del(&idd->list);
799 up_write(&ioc3_devices_rwsem);
800 kfree(idd);
801}
802
803static struct pci_device_id ioc3_id_table[] = {
804 {PCI_VENDOR_ID_SGI, PCI_DEVICE_ID_SGI_IOC3, PCI_ANY_ID, PCI_ANY_ID},
805 {0}
806};
807
808static struct pci_driver ioc3_driver = {
809 .name = "IOC3",
810 .id_table = ioc3_id_table,
811 .probe = ioc3_probe,
812 .remove = ioc3_remove,
813};
814
815MODULE_DEVICE_TABLE(pci, ioc3_id_table);
816
817/*********************
818 * Module management *
819 *********************/
820
821/* Module load */
822static int __devinit ioc3_init(void)
823{
824 if (ia64_platform_is("sn2"))
825 return pci_register_driver(&ioc3_driver);
826 return 0;
827}
828
829/* Module unload */
830static void __devexit ioc3_exit(void)
831{
832 pci_unregister_driver(&ioc3_driver);
833}
834
835module_init(ioc3_init);
836module_exit(ioc3_exit);
837
838MODULE_AUTHOR("Stanislaw Skowronek <skylark@linux-mips.org>");
839MODULE_DESCRIPTION("PCI driver for SGI IOC3");
840MODULE_LICENSE("GPL");
841
Pat Gefre53d8be52006-02-01 03:06:41 -0800842EXPORT_SYMBOL_GPL(ioc3_register_submodule);
843EXPORT_SYMBOL_GPL(ioc3_unregister_submodule);
844EXPORT_SYMBOL_GPL(ioc3_ack);
845EXPORT_SYMBOL_GPL(ioc3_gpcr_set);
846EXPORT_SYMBOL_GPL(ioc3_disable);
847EXPORT_SYMBOL_GPL(ioc3_enable);