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path: root/drivers/sn/ioc3.c
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-rw-r--r--drivers/sn/ioc3.c851
1 files changed, 851 insertions, 0 deletions
diff --git a/drivers/sn/ioc3.c b/drivers/sn/ioc3.c
new file mode 100644
index 000000000000..aaa009f4a7bf
--- /dev/null
+++ b/drivers/sn/ioc3.c
@@ -0,0 +1,851 @@
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/config.h>
11#include <linux/errno.h>
12#include <linux/module.h>
13#include <linux/pci.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
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;
28static rwlock_t ioc3_submodules_lock = RW_LOCK_UNLOCKED;
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{
41 volatile unsigned mcr;
42
43 do {
44 mcr = (volatile unsigned)idd->vma->mcr;
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);
56 idd->vma->mcr = mcr_pack(500, 65);
57 presence = nic_wait(idd);
58 local_irq_restore(flags);
59
60 udelay(500);
61
62 return presence;
63}
64
65static inline int nic_read_bit(struct ioc3_driver_data *idd)
66{
67 int result;
68 unsigned long flags;
69
70 local_irq_save(flags);
71 idd->vma->mcr = mcr_pack(6, 13);
72 result = nic_wait(idd);
73 local_irq_restore(flags);
74
75 udelay(500);
76
77 return result;
78}
79
80static inline void nic_write_bit(struct ioc3_driver_data *idd, int bit)
81{
82 if (bit)
83 idd->vma->mcr = mcr_pack(6, 110);
84 else
85 idd->vma->mcr = mcr_pack(80, 30);
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
340 idd->vma->gpcr_s = GPCR_MLAN_EN;
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
374static inline void
375write_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}
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
411 if(idd->dual_irq && 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, 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
623 ret = pci_set_dma_mask(pdev, 0xffffffffffffffffULL);
624 if (!ret) {
625 ret = pci_set_consistent_dma_mask(pdev, 0xffffffffffffffffULL);
626 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);
681 list_add(&idd->list, &ioc3_devices);
682 idd->id = ioc3_counter++;
683 up_write(&ioc3_devices_rwsem);
684
685 idd->gpdr_shadow = idd->vma->gpdr;
686
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 */
738 read_lock(&ioc3_submodules_lock);
739 for(id=0;id<IOC3_MAX_SUBMODULES;id++)
740 if(ioc3_submodules[id] && ioc3_submodules[id]->probe) {
741 idd->active[id] = 1;
742 idd->active[id] = !ioc3_submodules[id]->probe
743 (ioc3_submodules[id], idd);
744 }
745 read_unlock(&ioc3_submodules_lock);
746
747 printk(KERN_INFO "IOC3 Master Driver loaded for %s\n", pci_name(pdev));
748
749 return 0;
750
751out_misc_region:
752 release_region(idd->pma, IOC3_PCI_SIZE);
753out_pci:
754 kfree(idd);
755out_idd:
756 pci_disable_device(pdev);
757out:
758 return ret;
759}
760
761/* Removes a particular instance of an IOC3 card. */
762static void ioc3_remove(struct pci_dev *pdev)
763{
764 int id;
765 struct ioc3_driver_data *idd;
766
767 idd = pci_get_drvdata(pdev);
768
769 /* Remove this IOC3 from all submodules */
770 read_lock(&ioc3_submodules_lock);
771 for(id=0;id<IOC3_MAX_SUBMODULES;id++)
772 if(idd->active[id]) {
773 if(ioc3_submodules[id] && ioc3_submodules[id]->remove)
774 if(ioc3_submodules[id]->remove(ioc3_submodules[id],
775 idd))
776 printk(KERN_WARNING
777 "%s: IOC3 submodule 0x%s remove failed "
778 "for pci_dev %s.\n",
779 __FUNCTION__,
780 module_name(ioc3_submodules[id]->owner),
781 pci_name(pdev));
782 idd->active[id] = 0;
783 }
784 read_unlock(&ioc3_submodules_lock);
785
786 /* Clear and disable all IRQs */
787 write_ireg(idd, ~0, IOC3_W_IEC);
788 writel(~0, &idd->vma->sio_ir);
789
790 /* Release resources */
791 free_irq(idd->irq_io, (void *)idd);
792 if(idd->dual_irq)
793 free_irq(idd->irq_eth, (void *)idd);
794 iounmap(idd->vma);
795 release_region(idd->pma, IOC3_PCI_SIZE);
796
797 /* Disable IOC3 and relinquish */
798 pci_disable_device(pdev);
799
800 /* Remove and free driver data */
801 down_write(&ioc3_devices_rwsem);
802 list_del(&idd->list);
803 up_write(&ioc3_devices_rwsem);
804 kfree(idd);
805}
806
807static struct pci_device_id ioc3_id_table[] = {
808 {PCI_VENDOR_ID_SGI, PCI_DEVICE_ID_SGI_IOC3, PCI_ANY_ID, PCI_ANY_ID},
809 {0}
810};
811
812static struct pci_driver ioc3_driver = {
813 .name = "IOC3",
814 .id_table = ioc3_id_table,
815 .probe = ioc3_probe,
816 .remove = ioc3_remove,
817};
818
819MODULE_DEVICE_TABLE(pci, ioc3_id_table);
820
821/*********************
822 * Module management *
823 *********************/
824
825/* Module load */
826static int __devinit ioc3_init(void)
827{
828 if (ia64_platform_is("sn2"))
829 return pci_register_driver(&ioc3_driver);
830 return 0;
831}
832
833/* Module unload */
834static void __devexit ioc3_exit(void)
835{
836 pci_unregister_driver(&ioc3_driver);
837}
838
839module_init(ioc3_init);
840module_exit(ioc3_exit);
841
842MODULE_AUTHOR("Stanislaw Skowronek <skylark@linux-mips.org>");
843MODULE_DESCRIPTION("PCI driver for SGI IOC3");
844MODULE_LICENSE("GPL");
845
846EXPORT_SYMBOL(ioc3_register_submodule);
847EXPORT_SYMBOL(ioc3_unregister_submodule);
848EXPORT_SYMBOL(ioc3_ack);
849EXPORT_SYMBOL(ioc3_gpcr_set);
850EXPORT_SYMBOL(ioc3_disable);
851EXPORT_SYMBOL(ioc3_enable);
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-20 02:08:38 -0500