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09c434b8 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
2d0cfb52 PG |
2 | /* |
3 | * SGI IOC3 master driver and IRQ demuxer | |
4 | * | |
5 | * Copyright (c) 2005 Stanislaw Skowronek <skylark@linux-mips.org> | |
6 | * Heavily based on similar work by: | |
7 | * Brent Casavant <bcasavan@sgi.com> - IOC4 master driver | |
8 | * Pat Gefre <pfg@sgi.com> - IOC3 serial port IRQ demuxer | |
9 | */ | |
10 | ||
2d0cfb52 PG |
11 | #include <linux/errno.h> |
12 | #include <linux/module.h> | |
13 | #include <linux/pci.h> | |
56b146d3 | 14 | #include <linux/dma-mapping.h> |
2d0cfb52 PG |
15 | #include <linux/interrupt.h> |
16 | #include <linux/spinlock.h> | |
17 | #include <linux/delay.h> | |
18 | #include <linux/ioc3.h> | |
19 | #include <linux/rwsem.h> | |
5a0e3ad6 | 20 | #include <linux/slab.h> |
2d0cfb52 PG |
21 | |
22 | #define IOC3_PCI_SIZE 0x100000 | |
23 | ||
24 | static LIST_HEAD(ioc3_devices); | |
25 | static int ioc3_counter; | |
26 | static DECLARE_RWSEM(ioc3_devices_rwsem); | |
27 | ||
28 | static struct ioc3_submodule *ioc3_submodules[IOC3_MAX_SUBMODULES]; | |
29 | static struct ioc3_submodule *ioc3_ethernet; | |
34af946a | 30 | static DEFINE_RWLOCK(ioc3_submodules_lock); |
2d0cfb52 PG |
31 | |
32 | /* NIC probing code */ | |
33 | ||
34 | #define GPCR_MLAN_EN 0x00200000 /* enable MCR to pin 8 */ | |
35 | ||
36 | static inline unsigned mcr_pack(unsigned pulse, unsigned sample) | |
37 | { | |
38 | return (pulse << 10) | (sample << 2); | |
39 | } | |
40 | ||
41 | static int nic_wait(struct ioc3_driver_data *idd) | |
42 | { | |
d6561010 | 43 | unsigned mcr; |
2d0cfb52 PG |
44 | |
45 | do { | |
d6561010 | 46 | mcr = readl(&idd->vma->mcr); |
2d0cfb52 PG |
47 | } while (!(mcr & 2)); |
48 | ||
49 | return mcr & 1; | |
50 | } | |
51 | ||
52 | static int nic_reset(struct ioc3_driver_data *idd) | |
53 | { | |
54 | int presence; | |
55 | unsigned long flags; | |
56 | ||
57 | local_irq_save(flags); | |
d6561010 | 58 | writel(mcr_pack(500, 65), &idd->vma->mcr); |
2d0cfb52 PG |
59 | presence = nic_wait(idd); |
60 | local_irq_restore(flags); | |
61 | ||
62 | udelay(500); | |
63 | ||
64 | return presence; | |
65 | } | |
66 | ||
15b370c9 | 67 | static int nic_read_bit(struct ioc3_driver_data *idd) |
2d0cfb52 PG |
68 | { |
69 | int result; | |
70 | unsigned long flags; | |
71 | ||
72 | local_irq_save(flags); | |
d6561010 | 73 | writel(mcr_pack(6, 13), &idd->vma->mcr); |
2d0cfb52 PG |
74 | result = nic_wait(idd); |
75 | local_irq_restore(flags); | |
76 | ||
77 | udelay(500); | |
78 | ||
79 | return result; | |
80 | } | |
81 | ||
15b370c9 | 82 | static void nic_write_bit(struct ioc3_driver_data *idd, int bit) |
2d0cfb52 PG |
83 | { |
84 | if (bit) | |
d6561010 | 85 | writel(mcr_pack(6, 110), &idd->vma->mcr); |
2d0cfb52 | 86 | else |
d6561010 | 87 | writel(mcr_pack(80, 30), &idd->vma->mcr); |
2d0cfb52 PG |
88 | |
89 | nic_wait(idd); | |
90 | } | |
91 | ||
92 | static unsigned nic_read_byte(struct ioc3_driver_data *idd) | |
93 | { | |
94 | unsigned result = 0; | |
95 | int i; | |
96 | ||
97 | for (i = 0; i < 8; i++) | |
98 | result = (result >> 1) | (nic_read_bit(idd) << 7); | |
99 | ||
100 | return result; | |
101 | } | |
102 | ||
103 | static void nic_write_byte(struct ioc3_driver_data *idd, int byte) | |
104 | { | |
105 | int i, bit; | |
106 | ||
107 | for (i = 8; i; i--) { | |
108 | bit = byte & 1; | |
109 | byte >>= 1; | |
110 | ||
111 | nic_write_bit(idd, bit); | |
112 | } | |
113 | } | |
114 | ||
115 | static unsigned long | |
116 | nic_find(struct ioc3_driver_data *idd, int *last, unsigned long addr) | |
117 | { | |
118 | int a, b, index, disc; | |
119 | ||
120 | nic_reset(idd); | |
121 | ||
122 | /* Search ROM. */ | |
123 | nic_write_byte(idd, 0xF0); | |
124 | ||
125 | /* Algorithm from ``Book of iButton Standards''. */ | |
126 | for (index = 0, disc = 0; index < 64; index++) { | |
127 | a = nic_read_bit(idd); | |
128 | b = nic_read_bit(idd); | |
129 | ||
130 | if (a && b) { | |
131 | printk(KERN_WARNING "IOC3 NIC search failed.\n"); | |
132 | *last = 0; | |
133 | return 0; | |
134 | } | |
135 | ||
136 | if (!a && !b) { | |
137 | if (index == *last) { | |
138 | addr |= 1UL << index; | |
139 | } else if (index > *last) { | |
140 | addr &= ~(1UL << index); | |
141 | disc = index; | |
142 | } else if ((addr & (1UL << index)) == 0) | |
143 | disc = index; | |
144 | nic_write_bit(idd, (addr>>index)&1); | |
145 | continue; | |
146 | } else { | |
147 | if (a) | |
148 | addr |= 1UL << index; | |
149 | else | |
150 | addr &= ~(1UL << index); | |
151 | nic_write_bit(idd, a); | |
152 | continue; | |
153 | } | |
154 | } | |
155 | *last = disc; | |
156 | return addr; | |
157 | } | |
158 | ||
159 | static void nic_addr(struct ioc3_driver_data *idd, unsigned long addr) | |
160 | { | |
161 | int index; | |
162 | ||
163 | nic_reset(idd); | |
164 | nic_write_byte(idd, 0xF0); | |
165 | for (index = 0; index < 64; index++) { | |
166 | nic_read_bit(idd); | |
167 | nic_read_bit(idd); | |
168 | nic_write_bit(idd, (addr>>index)&1); | |
169 | } | |
170 | } | |
171 | ||
172 | static void crc16_byte(unsigned int *crc, unsigned char db) | |
173 | { | |
174 | int i; | |
175 | ||
176 | for(i=0;i<8;i++) { | |
177 | *crc <<= 1; | |
178 | if((db^(*crc>>16)) & 1) | |
179 | *crc ^= 0x8005; | |
180 | db >>= 1; | |
181 | } | |
182 | *crc &= 0xFFFF; | |
183 | } | |
184 | ||
185 | static unsigned int crc16_area(unsigned char *dbs, int size, unsigned int crc) | |
186 | { | |
187 | while(size--) | |
188 | crc16_byte(&crc, *(dbs++)); | |
189 | return crc; | |
190 | } | |
191 | ||
192 | static void crc8_byte(unsigned int *crc, unsigned char db) | |
193 | { | |
194 | int i,f; | |
195 | ||
196 | for(i=0;i<8;i++) { | |
197 | f = (*crc ^ db) & 1; | |
198 | *crc >>= 1; | |
199 | db >>= 1; | |
200 | if(f) | |
201 | *crc ^= 0x8c; | |
202 | } | |
203 | *crc &= 0xff; | |
204 | } | |
205 | ||
206 | static unsigned int crc8_addr(unsigned long addr) | |
207 | { | |
208 | int i; | |
209 | unsigned int crc = 0x00; | |
210 | ||
211 | for(i=0;i<8;i++) | |
212 | crc8_byte(&crc, addr>>(i<<3)); | |
213 | return crc; | |
214 | } | |
215 | ||
216 | static void | |
217 | read_redir_page(struct ioc3_driver_data *idd, unsigned long addr, int page, | |
218 | unsigned char *redir, unsigned char *data) | |
219 | { | |
220 | int loops = 16, i; | |
221 | ||
222 | while(redir[page] != 0xFF) { | |
223 | page = redir[page]^0xFF; | |
224 | loops--; | |
225 | if(loops<0) { | |
226 | printk(KERN_ERR "IOC3: NIC circular redirection\n"); | |
227 | return; | |
228 | } | |
229 | } | |
230 | loops = 3; | |
231 | while(loops>0) { | |
232 | nic_addr(idd, addr); | |
233 | nic_write_byte(idd, 0xF0); | |
234 | nic_write_byte(idd, (page << 5) & 0xE0); | |
235 | nic_write_byte(idd, (page >> 3) & 0x1F); | |
236 | for(i=0;i<0x20;i++) | |
237 | data[i] = nic_read_byte(idd); | |
238 | if(crc16_area(data, 0x20, 0x0000) == 0x800d) | |
239 | return; | |
240 | loops--; | |
241 | } | |
242 | printk(KERN_ERR "IOC3: CRC error in data page\n"); | |
243 | for(i=0;i<0x20;i++) | |
244 | data[i] = 0x00; | |
245 | } | |
246 | ||
247 | static void | |
248 | read_redir_map(struct ioc3_driver_data *idd, unsigned long addr, | |
249 | unsigned char *redir) | |
250 | { | |
251 | int i,j,loops = 3,crc_ok; | |
252 | unsigned int crc; | |
253 | ||
254 | while(loops>0) { | |
255 | crc_ok = 1; | |
256 | nic_addr(idd, addr); | |
257 | nic_write_byte(idd, 0xAA); | |
258 | nic_write_byte(idd, 0x00); | |
259 | nic_write_byte(idd, 0x01); | |
260 | for(i=0;i<64;i+=8) { | |
261 | for(j=0;j<8;j++) | |
262 | redir[i+j] = nic_read_byte(idd); | |
263 | crc = crc16_area(redir+i, 8, (i==0)?0x8707:0x0000); | |
264 | crc16_byte(&crc, nic_read_byte(idd)); | |
265 | crc16_byte(&crc, nic_read_byte(idd)); | |
266 | if(crc != 0x800d) | |
267 | crc_ok = 0; | |
268 | } | |
269 | if(crc_ok) | |
270 | return; | |
271 | loops--; | |
272 | } | |
273 | printk(KERN_ERR "IOC3: CRC error in redirection page\n"); | |
274 | for(i=0;i<64;i++) | |
275 | redir[i] = 0xFF; | |
276 | } | |
277 | ||
278 | static void read_nic(struct ioc3_driver_data *idd, unsigned long addr) | |
279 | { | |
280 | unsigned char redir[64]; | |
281 | unsigned char data[64],part[32]; | |
282 | int i,j; | |
283 | ||
284 | /* read redirections */ | |
285 | read_redir_map(idd, addr, redir); | |
286 | /* read data pages */ | |
287 | read_redir_page(idd, addr, 0, redir, data); | |
288 | read_redir_page(idd, addr, 1, redir, data+32); | |
289 | /* assemble the part # */ | |
290 | j=0; | |
291 | for(i=0;i<19;i++) | |
292 | if(data[i+11] != ' ') | |
293 | part[j++] = data[i+11]; | |
294 | for(i=0;i<6;i++) | |
295 | if(data[i+32] != ' ') | |
296 | part[j++] = data[i+32]; | |
297 | part[j] = 0; | |
298 | /* skip Octane power supplies */ | |
299 | if(!strncmp(part, "060-0035-", 9)) | |
300 | return; | |
301 | if(!strncmp(part, "060-0038-", 9)) | |
302 | return; | |
303 | strcpy(idd->nic_part, part); | |
304 | /* assemble the serial # */ | |
305 | j=0; | |
306 | for(i=0;i<10;i++) | |
307 | if(data[i+1] != ' ') | |
308 | idd->nic_serial[j++] = data[i+1]; | |
309 | idd->nic_serial[j] = 0; | |
310 | } | |
311 | ||
312 | static void read_mac(struct ioc3_driver_data *idd, unsigned long addr) | |
313 | { | |
314 | int i, loops = 3; | |
315 | unsigned char data[13]; | |
316 | ||
317 | while(loops>0) { | |
318 | nic_addr(idd, addr); | |
319 | nic_write_byte(idd, 0xF0); | |
320 | nic_write_byte(idd, 0x00); | |
321 | nic_write_byte(idd, 0x00); | |
322 | nic_read_byte(idd); | |
323 | for(i=0;i<13;i++) | |
324 | data[i] = nic_read_byte(idd); | |
325 | if(crc16_area(data, 13, 0x0000) == 0x800d) { | |
326 | for(i=10;i>4;i--) | |
327 | idd->nic_mac[10-i] = data[i]; | |
328 | return; | |
329 | } | |
330 | loops--; | |
331 | } | |
332 | printk(KERN_ERR "IOC3: CRC error in MAC address\n"); | |
333 | for(i=0;i<6;i++) | |
334 | idd->nic_mac[i] = 0x00; | |
335 | } | |
336 | ||
337 | static void probe_nic(struct ioc3_driver_data *idd) | |
338 | { | |
339 | int save = 0, loops = 3; | |
340 | unsigned long first, addr; | |
341 | ||
d6561010 | 342 | writel(GPCR_MLAN_EN, &idd->vma->gpcr_s); |
2d0cfb52 PG |
343 | |
344 | while(loops>0) { | |
345 | idd->nic_part[0] = 0; | |
346 | idd->nic_serial[0] = 0; | |
347 | addr = first = nic_find(idd, &save, 0); | |
348 | if(!first) | |
349 | return; | |
350 | while(1) { | |
351 | if(crc8_addr(addr)) | |
352 | break; | |
353 | else { | |
354 | switch(addr & 0xFF) { | |
355 | case 0x0B: | |
356 | read_nic(idd, addr); | |
357 | break; | |
358 | case 0x09: | |
359 | case 0x89: | |
360 | case 0x91: | |
361 | read_mac(idd, addr); | |
362 | break; | |
363 | } | |
364 | } | |
365 | addr = nic_find(idd, &save, addr); | |
366 | if(addr == first) | |
367 | return; | |
368 | } | |
369 | loops--; | |
370 | } | |
371 | printk(KERN_ERR "IOC3: CRC error in NIC address\n"); | |
372 | } | |
373 | ||
374 | /* Interrupts */ | |
375 | ||
15b370c9 | 376 | static void write_ireg(struct ioc3_driver_data *idd, uint32_t val, int which) |
2d0cfb52 PG |
377 | { |
378 | unsigned long flags; | |
379 | ||
380 | spin_lock_irqsave(&idd->ir_lock, flags); | |
381 | switch (which) { | |
382 | case IOC3_W_IES: | |
383 | writel(val, &idd->vma->sio_ies); | |
384 | break; | |
385 | case IOC3_W_IEC: | |
386 | writel(val, &idd->vma->sio_iec); | |
387 | break; | |
388 | } | |
389 | spin_unlock_irqrestore(&idd->ir_lock, flags); | |
390 | } | |
391 | static inline uint32_t get_pending_intrs(struct ioc3_driver_data *idd) | |
392 | { | |
393 | unsigned long flag; | |
394 | uint32_t intrs = 0; | |
395 | ||
396 | spin_lock_irqsave(&idd->ir_lock, flag); | |
397 | intrs = readl(&idd->vma->sio_ir); | |
398 | intrs &= readl(&idd->vma->sio_ies); | |
399 | spin_unlock_irqrestore(&idd->ir_lock, flag); | |
400 | return intrs; | |
401 | } | |
402 | ||
7d12e780 | 403 | static irqreturn_t ioc3_intr_io(int irq, void *arg) |
2d0cfb52 PG |
404 | { |
405 | unsigned long flags; | |
c7bec5ab | 406 | struct ioc3_driver_data *idd = arg; |
2d0cfb52 PG |
407 | int handled = 1, id; |
408 | unsigned int pending; | |
409 | ||
410 | read_lock_irqsave(&ioc3_submodules_lock, flags); | |
411 | ||
d6561010 | 412 | if(idd->dual_irq && readb(&idd->vma->eisr)) { |
2d0cfb52 PG |
413 | /* send Ethernet IRQ to the driver */ |
414 | if(ioc3_ethernet && idd->active[ioc3_ethernet->id] && | |
415 | ioc3_ethernet->intr) { | |
416 | handled = handled && !ioc3_ethernet->intr(ioc3_ethernet, | |
7d12e780 | 417 | idd, 0); |
2d0cfb52 PG |
418 | } |
419 | } | |
420 | pending = get_pending_intrs(idd); /* look at the IO IRQs */ | |
421 | ||
422 | for(id=0;id<IOC3_MAX_SUBMODULES;id++) { | |
423 | if(idd->active[id] && ioc3_submodules[id] | |
424 | && (pending & ioc3_submodules[id]->irq_mask) | |
425 | && ioc3_submodules[id]->intr) { | |
426 | write_ireg(idd, ioc3_submodules[id]->irq_mask, | |
427 | IOC3_W_IEC); | |
428 | if(!ioc3_submodules[id]->intr(ioc3_submodules[id], | |
7d12e780 | 429 | idd, pending & ioc3_submodules[id]->irq_mask)) |
2d0cfb52 PG |
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 | ||
7d12e780 | 446 | static irqreturn_t ioc3_intr_eth(int irq, void *arg) |
2d0cfb52 PG |
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) | |
7d12e780 | 457 | handled = handled && !ioc3_ethernet->intr(ioc3_ethernet, idd, 0); |
2d0cfb52 PG |
458 | read_unlock_irqrestore(&ioc3_submodules_lock, flags); |
459 | return handled?IRQ_HANDLED:IRQ_NONE; | |
460 | } | |
461 | ||
462 | void ioc3_enable(struct ioc3_submodule *is, | |
463 | struct ioc3_driver_data *idd, unsigned int irqs) | |
464 | { | |
465 | write_ireg(idd, irqs & is->irq_mask, IOC3_W_IES); | |
466 | } | |
467 | ||
468 | void ioc3_ack(struct ioc3_submodule *is, struct ioc3_driver_data *idd, | |
469 | unsigned int irqs) | |
470 | { | |
471 | writel(irqs & is->irq_mask, &idd->vma->sio_ir); | |
472 | } | |
473 | ||
474 | void ioc3_disable(struct ioc3_submodule *is, | |
475 | struct ioc3_driver_data *idd, unsigned int irqs) | |
476 | { | |
477 | write_ireg(idd, irqs & is->irq_mask, IOC3_W_IEC); | |
478 | } | |
479 | ||
480 | void ioc3_gpcr_set(struct ioc3_driver_data *idd, unsigned int val) | |
481 | { | |
482 | unsigned long flags; | |
483 | spin_lock_irqsave(&idd->gpio_lock, flags); | |
484 | writel(val, &idd->vma->gpcr_s); | |
485 | spin_unlock_irqrestore(&idd->gpio_lock, flags); | |
486 | } | |
487 | ||
488 | /* Keep it simple, stupid! */ | |
489 | static int find_slot(void **tab, int max) | |
490 | { | |
491 | int i; | |
492 | for(i=0;i<max;i++) | |
493 | if(!(tab[i])) | |
494 | return i; | |
495 | return -1; | |
496 | } | |
497 | ||
498 | /* Register an IOC3 submodule */ | |
499 | int ioc3_register_submodule(struct ioc3_submodule *is) | |
500 | { | |
501 | struct ioc3_driver_data *idd; | |
502 | int alloc_id; | |
503 | unsigned long flags; | |
504 | ||
505 | write_lock_irqsave(&ioc3_submodules_lock, flags); | |
506 | alloc_id = find_slot((void **)ioc3_submodules, IOC3_MAX_SUBMODULES); | |
507 | if(alloc_id != -1) { | |
508 | ioc3_submodules[alloc_id] = is; | |
509 | if(is->ethernet) { | |
510 | if(ioc3_ethernet==NULL) | |
511 | ioc3_ethernet=is; | |
512 | else | |
513 | printk(KERN_WARNING | |
514 | "IOC3 Ethernet module already registered!\n"); | |
515 | } | |
516 | } | |
517 | write_unlock_irqrestore(&ioc3_submodules_lock, flags); | |
518 | ||
519 | if(alloc_id == -1) { | |
520 | printk(KERN_WARNING "Increase IOC3_MAX_SUBMODULES!\n"); | |
521 | return -ENOMEM; | |
522 | } | |
523 | ||
524 | is->id=alloc_id; | |
525 | ||
526 | /* Initialize submodule for each IOC3 */ | |
527 | if (!is->probe) | |
528 | return 0; | |
529 | ||
530 | down_read(&ioc3_devices_rwsem); | |
531 | list_for_each_entry(idd, &ioc3_devices, list) { | |
532 | /* set to 1 for IRQs in probe */ | |
533 | idd->active[alloc_id] = 1; | |
534 | idd->active[alloc_id] = !is->probe(is, idd); | |
535 | } | |
536 | up_read(&ioc3_devices_rwsem); | |
537 | ||
538 | return 0; | |
539 | } | |
540 | ||
541 | /* Unregister an IOC3 submodule */ | |
542 | void ioc3_unregister_submodule(struct ioc3_submodule *is) | |
543 | { | |
544 | struct ioc3_driver_data *idd; | |
545 | unsigned long flags; | |
546 | ||
547 | write_lock_irqsave(&ioc3_submodules_lock, flags); | |
548 | if(ioc3_submodules[is->id]==is) | |
549 | ioc3_submodules[is->id]=NULL; | |
550 | else | |
551 | printk(KERN_WARNING | |
552 | "IOC3 submodule %s has wrong ID.\n",is->name); | |
553 | if(ioc3_ethernet==is) | |
554 | ioc3_ethernet = NULL; | |
555 | write_unlock_irqrestore(&ioc3_submodules_lock, flags); | |
556 | ||
557 | /* Remove submodule for each IOC3 */ | |
558 | down_read(&ioc3_devices_rwsem); | |
559 | list_for_each_entry(idd, &ioc3_devices, list) | |
560 | if(idd->active[is->id]) { | |
561 | if(is->remove) | |
562 | if(is->remove(is, idd)) | |
563 | printk(KERN_WARNING | |
564 | "%s: IOC3 submodule %s remove failed " | |
565 | "for pci_dev %s.\n", | |
9150c979 | 566 | __func__, module_name(is->owner), |
2d0cfb52 PG |
567 | pci_name(idd->pdev)); |
568 | idd->active[is->id] = 0; | |
569 | if(is->irq_mask) | |
570 | write_ireg(idd, is->irq_mask, IOC3_W_IEC); | |
571 | } | |
572 | up_read(&ioc3_devices_rwsem); | |
573 | } | |
574 | ||
575 | /********************* | |
576 | * Device management * | |
577 | *********************/ | |
578 | ||
0fe763c5 GKH |
579 | static char *ioc3_class_names[] = { "unknown", "IP27 BaseIO", "IP30 system", |
580 | "MENET 1/2/3", "MENET 4", "CADduo", "Altix Serial" }; | |
2d0cfb52 | 581 | |
0fe763c5 | 582 | static int ioc3_class(struct ioc3_driver_data *idd) |
2d0cfb52 PG |
583 | { |
584 | int res = IOC3_CLASS_NONE; | |
585 | /* NIC-based logic */ | |
586 | if(!strncmp(idd->nic_part, "030-0891-", 9)) | |
587 | res = IOC3_CLASS_BASE_IP30; | |
588 | if(!strncmp(idd->nic_part, "030-1155-", 9)) | |
589 | res = IOC3_CLASS_CADDUO; | |
590 | if(!strncmp(idd->nic_part, "030-1657-", 9)) | |
591 | res = IOC3_CLASS_SERIAL; | |
592 | if(!strncmp(idd->nic_part, "030-1664-", 9)) | |
593 | res = IOC3_CLASS_SERIAL; | |
594 | /* total random heuristics */ | |
595 | #ifdef CONFIG_SGI_IP27 | |
596 | if(!idd->nic_part[0]) | |
597 | res = IOC3_CLASS_BASE_IP27; | |
598 | #endif | |
599 | /* print educational message */ | |
600 | printk(KERN_INFO "IOC3 part: [%s], serial: [%s] => class %s\n", | |
601 | idd->nic_part, idd->nic_serial, ioc3_class_names[res]); | |
602 | return res; | |
603 | } | |
604 | /* Adds a new instance of an IOC3 card */ | |
0fe763c5 | 605 | static int ioc3_probe(struct pci_dev *pdev, const struct pci_device_id *pci_id) |
2d0cfb52 PG |
606 | { |
607 | struct ioc3_driver_data *idd; | |
608 | uint32_t pcmd; | |
609 | int ret, id; | |
610 | ||
611 | /* Enable IOC3 and take ownership of it */ | |
612 | if ((ret = pci_enable_device(pdev))) { | |
613 | printk(KERN_WARNING | |
614 | "%s: Failed to enable IOC3 device for pci_dev %s.\n", | |
9150c979 | 615 | __func__, pci_name(pdev)); |
2d0cfb52 PG |
616 | goto out; |
617 | } | |
618 | pci_set_master(pdev); | |
619 | ||
620 | #ifdef USE_64BIT_DMA | |
6a35528a | 621 | ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(64)); |
2d0cfb52 | 622 | if (!ret) { |
6a35528a | 623 | ret = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)); |
2d0cfb52 PG |
624 | if (ret < 0) { |
625 | printk(KERN_WARNING "%s: Unable to obtain 64 bit DMA " | |
626 | "for consistent allocations\n", | |
9150c979 | 627 | __func__); |
2d0cfb52 PG |
628 | } |
629 | } | |
630 | #endif | |
631 | ||
632 | /* Set up per-IOC3 data */ | |
dd00cc48 | 633 | idd = kzalloc(sizeof(struct ioc3_driver_data), GFP_KERNEL); |
2d0cfb52 PG |
634 | if (!idd) { |
635 | printk(KERN_WARNING | |
636 | "%s: Failed to allocate IOC3 data for pci_dev %s.\n", | |
9150c979 | 637 | __func__, pci_name(pdev)); |
2d0cfb52 PG |
638 | ret = -ENODEV; |
639 | goto out_idd; | |
640 | } | |
2d0cfb52 PG |
641 | spin_lock_init(&idd->ir_lock); |
642 | spin_lock_init(&idd->gpio_lock); | |
643 | idd->pdev = pdev; | |
644 | ||
645 | /* Map all IOC3 registers. These are shared between subdevices | |
646 | * so the main IOC3 module manages them. | |
647 | */ | |
648 | idd->pma = pci_resource_start(pdev, 0); | |
649 | if (!idd->pma) { | |
650 | printk(KERN_WARNING | |
651 | "%s: Unable to find IOC3 resource " | |
652 | "for pci_dev %s.\n", | |
9150c979 | 653 | __func__, pci_name(pdev)); |
2d0cfb52 PG |
654 | ret = -ENODEV; |
655 | goto out_pci; | |
656 | } | |
52c9ae0a | 657 | if (!request_mem_region(idd->pma, IOC3_PCI_SIZE, "ioc3")) { |
2d0cfb52 PG |
658 | printk(KERN_WARNING |
659 | "%s: Unable to request IOC3 region " | |
660 | "for pci_dev %s.\n", | |
9150c979 | 661 | __func__, pci_name(pdev)); |
2d0cfb52 PG |
662 | ret = -ENODEV; |
663 | goto out_pci; | |
664 | } | |
665 | idd->vma = ioremap(idd->pma, IOC3_PCI_SIZE); | |
666 | if (!idd->vma) { | |
667 | printk(KERN_WARNING | |
668 | "%s: Unable to remap IOC3 region " | |
669 | "for pci_dev %s.\n", | |
9150c979 | 670 | __func__, pci_name(pdev)); |
2d0cfb52 PG |
671 | ret = -ENODEV; |
672 | goto out_misc_region; | |
673 | } | |
674 | ||
675 | /* Track PCI-device specific data */ | |
676 | pci_set_drvdata(pdev, idd); | |
677 | down_write(&ioc3_devices_rwsem); | |
2c43630f | 678 | list_add_tail(&idd->list, &ioc3_devices); |
2d0cfb52 PG |
679 | idd->id = ioc3_counter++; |
680 | up_write(&ioc3_devices_rwsem); | |
681 | ||
d6561010 | 682 | idd->gpdr_shadow = readl(&idd->vma->gpdr); |
2d0cfb52 PG |
683 | |
684 | /* Read IOC3 NIC contents */ | |
685 | probe_nic(idd); | |
686 | ||
687 | /* Detect IOC3 class */ | |
688 | idd->class = ioc3_class(idd); | |
689 | ||
690 | /* Initialize IOC3 */ | |
691 | pci_read_config_dword(pdev, PCI_COMMAND, &pcmd); | |
692 | pci_write_config_dword(pdev, PCI_COMMAND, | |
693 | pcmd | PCI_COMMAND_MEMORY | | |
694 | PCI_COMMAND_PARITY | PCI_COMMAND_SERR | | |
695 | PCI_SCR_DROP_MODE_EN); | |
696 | ||
697 | write_ireg(idd, ~0, IOC3_W_IEC); | |
698 | writel(~0, &idd->vma->sio_ir); | |
699 | ||
700 | /* Set up IRQs */ | |
701 | if(idd->class == IOC3_CLASS_BASE_IP30 | |
702 | || idd->class == IOC3_CLASS_BASE_IP27) { | |
703 | writel(0, &idd->vma->eier); | |
704 | writel(~0, &idd->vma->eisr); | |
705 | ||
706 | idd->dual_irq = 1; | |
dace1453 | 707 | if (!request_irq(pdev->irq, ioc3_intr_eth, IRQF_SHARED, |
2d0cfb52 PG |
708 | "ioc3-eth", (void *)idd)) { |
709 | idd->irq_eth = pdev->irq; | |
710 | } else { | |
711 | printk(KERN_WARNING | |
712 | "%s : request_irq fails for IRQ 0x%x\n ", | |
9150c979 | 713 | __func__, pdev->irq); |
2d0cfb52 | 714 | } |
dace1453 | 715 | if (!request_irq(pdev->irq+2, ioc3_intr_io, IRQF_SHARED, |
2d0cfb52 PG |
716 | "ioc3-io", (void *)idd)) { |
717 | idd->irq_io = pdev->irq+2; | |
718 | } else { | |
719 | printk(KERN_WARNING | |
720 | "%s : request_irq fails for IRQ 0x%x\n ", | |
9150c979 | 721 | __func__, pdev->irq+2); |
2d0cfb52 PG |
722 | } |
723 | } else { | |
dace1453 | 724 | if (!request_irq(pdev->irq, ioc3_intr_io, IRQF_SHARED, |
2d0cfb52 PG |
725 | "ioc3", (void *)idd)) { |
726 | idd->irq_io = pdev->irq; | |
727 | } else { | |
728 | printk(KERN_WARNING | |
729 | "%s : request_irq fails for IRQ 0x%x\n ", | |
9150c979 | 730 | __func__, pdev->irq); |
2d0cfb52 PG |
731 | } |
732 | } | |
733 | ||
734 | /* Add this IOC3 to all submodules */ | |
2d0cfb52 PG |
735 | for(id=0;id<IOC3_MAX_SUBMODULES;id++) |
736 | if(ioc3_submodules[id] && ioc3_submodules[id]->probe) { | |
737 | idd->active[id] = 1; | |
738 | idd->active[id] = !ioc3_submodules[id]->probe | |
739 | (ioc3_submodules[id], idd); | |
740 | } | |
2d0cfb52 PG |
741 | |
742 | printk(KERN_INFO "IOC3 Master Driver loaded for %s\n", pci_name(pdev)); | |
743 | ||
744 | return 0; | |
745 | ||
746 | out_misc_region: | |
52c9ae0a | 747 | release_mem_region(idd->pma, IOC3_PCI_SIZE); |
2d0cfb52 PG |
748 | out_pci: |
749 | kfree(idd); | |
750 | out_idd: | |
751 | pci_disable_device(pdev); | |
752 | out: | |
753 | return ret; | |
754 | } | |
755 | ||
756 | /* Removes a particular instance of an IOC3 card. */ | |
0fe763c5 | 757 | static void ioc3_remove(struct pci_dev *pdev) |
2d0cfb52 PG |
758 | { |
759 | int id; | |
760 | struct ioc3_driver_data *idd; | |
761 | ||
762 | idd = pci_get_drvdata(pdev); | |
763 | ||
764 | /* Remove this IOC3 from all submodules */ | |
2d0cfb52 PG |
765 | for(id=0;id<IOC3_MAX_SUBMODULES;id++) |
766 | if(idd->active[id]) { | |
767 | if(ioc3_submodules[id] && ioc3_submodules[id]->remove) | |
768 | if(ioc3_submodules[id]->remove(ioc3_submodules[id], | |
769 | idd)) | |
770 | printk(KERN_WARNING | |
771 | "%s: IOC3 submodule 0x%s remove failed " | |
772 | "for pci_dev %s.\n", | |
9150c979 | 773 | __func__, |
2d0cfb52 PG |
774 | module_name(ioc3_submodules[id]->owner), |
775 | pci_name(pdev)); | |
776 | idd->active[id] = 0; | |
777 | } | |
2d0cfb52 PG |
778 | |
779 | /* Clear and disable all IRQs */ | |
780 | write_ireg(idd, ~0, IOC3_W_IEC); | |
781 | writel(~0, &idd->vma->sio_ir); | |
782 | ||
783 | /* Release resources */ | |
784 | free_irq(idd->irq_io, (void *)idd); | |
785 | if(idd->dual_irq) | |
786 | free_irq(idd->irq_eth, (void *)idd); | |
787 | iounmap(idd->vma); | |
52c9ae0a | 788 | release_mem_region(idd->pma, IOC3_PCI_SIZE); |
2d0cfb52 PG |
789 | |
790 | /* Disable IOC3 and relinquish */ | |
791 | pci_disable_device(pdev); | |
792 | ||
793 | /* Remove and free driver data */ | |
794 | down_write(&ioc3_devices_rwsem); | |
795 | list_del(&idd->list); | |
796 | up_write(&ioc3_devices_rwsem); | |
797 | kfree(idd); | |
798 | } | |
799 | ||
800 | static struct pci_device_id ioc3_id_table[] = { | |
801 | {PCI_VENDOR_ID_SGI, PCI_DEVICE_ID_SGI_IOC3, PCI_ANY_ID, PCI_ANY_ID}, | |
802 | {0} | |
803 | }; | |
804 | ||
805 | static struct pci_driver ioc3_driver = { | |
806 | .name = "IOC3", | |
807 | .id_table = ioc3_id_table, | |
808 | .probe = ioc3_probe, | |
0fe763c5 | 809 | .remove = ioc3_remove, |
2d0cfb52 PG |
810 | }; |
811 | ||
812 | MODULE_DEVICE_TABLE(pci, ioc3_id_table); | |
813 | ||
814 | /********************* | |
815 | * Module management * | |
816 | *********************/ | |
817 | ||
818 | /* Module load */ | |
2ea5d35a | 819 | static int __init ioc3_init(void) |
2d0cfb52 PG |
820 | { |
821 | if (ia64_platform_is("sn2")) | |
822 | return pci_register_driver(&ioc3_driver); | |
9385565e | 823 | return -ENODEV; |
2d0cfb52 PG |
824 | } |
825 | ||
826 | /* Module unload */ | |
2ea5d35a | 827 | static void __exit ioc3_exit(void) |
2d0cfb52 PG |
828 | { |
829 | pci_unregister_driver(&ioc3_driver); | |
830 | } | |
831 | ||
832 | module_init(ioc3_init); | |
833 | module_exit(ioc3_exit); | |
834 | ||
835 | MODULE_AUTHOR("Stanislaw Skowronek <skylark@linux-mips.org>"); | |
836 | MODULE_DESCRIPTION("PCI driver for SGI IOC3"); | |
837 | MODULE_LICENSE("GPL"); | |
838 | ||
53d8be5c PG |
839 | EXPORT_SYMBOL_GPL(ioc3_register_submodule); |
840 | EXPORT_SYMBOL_GPL(ioc3_unregister_submodule); | |
841 | EXPORT_SYMBOL_GPL(ioc3_ack); | |
842 | EXPORT_SYMBOL_GPL(ioc3_gpcr_set); | |
843 | EXPORT_SYMBOL_GPL(ioc3_disable); | |
844 | EXPORT_SYMBOL_GPL(ioc3_enable); |