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2d0cfb52 PG |
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 | ||
22 | static LIST_HEAD(ioc3_devices); | |
23 | static int ioc3_counter; | |
24 | static DECLARE_RWSEM(ioc3_devices_rwsem); | |
25 | ||
26 | static struct ioc3_submodule *ioc3_submodules[IOC3_MAX_SUBMODULES]; | |
27 | static struct ioc3_submodule *ioc3_ethernet; | |
28 | static 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 | ||
34 | static inline unsigned mcr_pack(unsigned pulse, unsigned sample) | |
35 | { | |
36 | return (pulse << 10) | (sample << 2); | |
37 | } | |
38 | ||
39 | static 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 | ||
50 | static 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 | ||
65 | static 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 | ||
80 | static 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 | ||
90 | static 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 | ||
101 | static 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 | ||
113 | static unsigned long | |
114 | nic_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 | ||
157 | static 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 | ||
170 | static 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 | ||
183 | static 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 | ||
190 | static 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 | ||
204 | static 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 | ||
214 | static void | |
215 | read_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 | ||
245 | static void | |
246 | read_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 | ||
276 | static 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 | ||
310 | static 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 | ||
335 | static 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 | ||
374 | static inline void | |
375 | 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, 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 | ||
446 | static 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 | ||
463 | void 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 | ||
469 | void 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 | ||
475 | void 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 | ||
481 | void 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! */ | |
490 | static 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 */ | |
500 | int 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 */ | |
543 | void 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 | ||
580 | static char * | |
581 | ioc3_class_names[]={"unknown", "IP27 BaseIO", "IP30 system", "MENET 1/2/3", | |
582 | "MENET 4", "CADduo", "Altix Serial"}; | |
583 | ||
584 | static 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 */ | |
607 | static 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 | ||
751 | out_misc_region: | |
752 | release_region(idd->pma, IOC3_PCI_SIZE); | |
753 | out_pci: | |
754 | kfree(idd); | |
755 | out_idd: | |
756 | pci_disable_device(pdev); | |
757 | out: | |
758 | return ret; | |
759 | } | |
760 | ||
761 | /* Removes a particular instance of an IOC3 card. */ | |
762 | static 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 | ||
807 | static 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 | ||
812 | static struct pci_driver ioc3_driver = { | |
813 | .name = "IOC3", | |
814 | .id_table = ioc3_id_table, | |
815 | .probe = ioc3_probe, | |
816 | .remove = ioc3_remove, | |
817 | }; | |
818 | ||
819 | MODULE_DEVICE_TABLE(pci, ioc3_id_table); | |
820 | ||
821 | /********************* | |
822 | * Module management * | |
823 | *********************/ | |
824 | ||
825 | /* Module load */ | |
826 | static 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 */ | |
834 | static void __devexit ioc3_exit(void) | |
835 | { | |
836 | pci_unregister_driver(&ioc3_driver); | |
837 | } | |
838 | ||
839 | module_init(ioc3_init); | |
840 | module_exit(ioc3_exit); | |
841 | ||
842 | MODULE_AUTHOR("Stanislaw Skowronek <skylark@linux-mips.org>"); | |
843 | MODULE_DESCRIPTION("PCI driver for SGI IOC3"); | |
844 | MODULE_LICENSE("GPL"); | |
845 | ||
846 | EXPORT_SYMBOL(ioc3_register_submodule); | |
847 | EXPORT_SYMBOL(ioc3_unregister_submodule); | |
848 | EXPORT_SYMBOL(ioc3_ack); | |
849 | EXPORT_SYMBOL(ioc3_gpcr_set); | |
850 | EXPORT_SYMBOL(ioc3_disable); | |
851 | EXPORT_SYMBOL(ioc3_enable); |