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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); |
844 |
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