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1da177e4 LT |
1 | /* |
2 | * linux/arch/arm26/kernel/ecard.c | |
3 | * | |
4 | * Copyright 1995-2001 Russell King | |
5 | * Copyright 2003 Ian Molton | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | * | |
11 | * Find all installed expansion cards, and handle interrupts from them. | |
12 | * | |
13 | * Created from information from Acorns RiscOS3 PRMs | |
14 | * 15-Jun-2003 IM Modified from ARM32 (RiscPC capable) version | |
15 | * 10-Jan-1999 RMK Run loaders in a simulated RISC OS environment. | |
16 | * 06-May-1997 RMK Added blacklist for cards whose loader doesn't work. | |
17 | * 12-Sep-1997 RMK Created new handling of interrupt enables/disables | |
18 | * - cards can now register their own routine to control | |
19 | * interrupts (recommended). | |
20 | * 29-Sep-1997 RMK Expansion card interrupt hardware not being re-enabled | |
21 | * on reset from Linux. (Caused cards not to respond | |
22 | * under RiscOS without hard reset). | |
23 | * | |
24 | */ | |
25 | #define ECARD_C | |
26 | ||
1da177e4 LT |
27 | #include <linux/module.h> |
28 | #include <linux/kernel.h> | |
29 | #include <linux/types.h> | |
30 | #include <linux/sched.h> | |
31 | #include <linux/interrupt.h> | |
32 | #include <linux/reboot.h> | |
33 | #include <linux/mm.h> | |
34 | #include <linux/slab.h> | |
35 | #include <linux/proc_fs.h> | |
36 | #include <linux/device.h> | |
37 | #include <linux/init.h> | |
38 | ||
39 | #include <asm/dma.h> | |
40 | #include <asm/ecard.h> | |
41 | #include <asm/hardware.h> | |
42 | #include <asm/io.h> | |
43 | #include <asm/irq.h> | |
44 | #include <asm/mmu_context.h> | |
45 | #include <asm/irqchip.h> | |
46 | #include <asm/tlbflush.h> | |
47 | ||
48 | enum req { | |
49 | req_readbytes, | |
50 | req_reset | |
51 | }; | |
52 | ||
53 | struct ecard_request { | |
54 | enum req req; | |
55 | ecard_t *ec; | |
56 | unsigned int address; | |
57 | unsigned int length; | |
58 | unsigned int use_loader; | |
59 | void *buffer; | |
60 | }; | |
61 | ||
62 | struct expcard_blacklist { | |
63 | unsigned short manufacturer; | |
64 | unsigned short product; | |
65 | const char *type; | |
66 | }; | |
67 | ||
68 | static ecard_t *cards; | |
69 | static ecard_t *slot_to_expcard[MAX_ECARDS]; | |
70 | static unsigned int ectcr; | |
71 | ||
72 | /* List of descriptions of cards which don't have an extended | |
73 | * identification, or chunk directories containing a description. | |
74 | */ | |
75 | static struct expcard_blacklist __initdata blacklist[] = { | |
76 | { MANU_ACORN, PROD_ACORN_ETHER1, "Acorn Ether1" } | |
77 | }; | |
78 | ||
79 | asmlinkage extern int | |
80 | ecard_loader_reset(volatile unsigned char *pa, loader_t loader); | |
81 | asmlinkage extern int | |
82 | ecard_loader_read(int off, volatile unsigned char *pa, loader_t loader); | |
83 | ||
84 | static const struct ecard_id * | |
85 | ecard_match_device(const struct ecard_id *ids, struct expansion_card *ec); | |
86 | ||
87 | static inline unsigned short | |
88 | ecard_getu16(unsigned char *v) | |
89 | { | |
90 | return v[0] | v[1] << 8; | |
91 | } | |
92 | ||
93 | static inline signed long | |
94 | ecard_gets24(unsigned char *v) | |
95 | { | |
96 | return v[0] | v[1] << 8 | v[2] << 16 | ((v[2] & 0x80) ? 0xff000000 : 0); | |
97 | } | |
98 | ||
99 | static inline ecard_t * | |
100 | slot_to_ecard(unsigned int slot) | |
101 | { | |
102 | return slot < MAX_ECARDS ? slot_to_expcard[slot] : NULL; | |
103 | } | |
104 | ||
105 | /* ===================== Expansion card daemon ======================== */ | |
106 | /* | |
107 | * Since the loader programs on the expansion cards need to be run | |
108 | * in a specific environment, create a separate task with this | |
109 | * environment up, and pass requests to this task as and when we | |
110 | * need to. | |
111 | * | |
112 | * This should allow 99% of loaders to be called from Linux. | |
113 | * | |
114 | * From a security standpoint, we trust the card vendors. This | |
115 | * may be a misplaced trust. | |
116 | */ | |
117 | #define BUS_ADDR(x) ((((unsigned long)(x)) << 2) + IO_BASE) | |
118 | #define POD_INT_ADDR(x) ((volatile unsigned char *)\ | |
119 | ((BUS_ADDR((x)) - IO_BASE) + IO_START)) | |
120 | ||
121 | static inline void ecard_task_reset(struct ecard_request *req) | |
122 | { | |
123 | struct expansion_card *ec = req->ec; | |
124 | if (ec->loader) | |
125 | ecard_loader_reset(POD_INT_ADDR(ec->podaddr), ec->loader); | |
126 | } | |
127 | ||
128 | static void | |
129 | ecard_task_readbytes(struct ecard_request *req) | |
130 | { | |
131 | unsigned char *buf = (unsigned char *)req->buffer; | |
132 | volatile unsigned char *base_addr = | |
133 | (volatile unsigned char *)POD_INT_ADDR(req->ec->podaddr); | |
134 | unsigned int len = req->length; | |
135 | unsigned int off = req->address; | |
136 | ||
137 | if (!req->use_loader || !req->ec->loader) { | |
138 | off *= 4; | |
139 | while (len--) { | |
140 | *buf++ = base_addr[off]; | |
141 | off += 4; | |
142 | } | |
143 | } else { | |
144 | while(len--) { | |
145 | /* | |
146 | * The following is required by some | |
147 | * expansion card loader programs. | |
148 | */ | |
149 | *(unsigned long *)0x108 = 0; | |
150 | *buf++ = ecard_loader_read(off++, base_addr, | |
151 | req->ec->loader); | |
152 | } | |
153 | } | |
154 | } | |
155 | ||
156 | static void ecard_do_request(struct ecard_request *req) | |
157 | { | |
158 | switch (req->req) { | |
159 | case req_readbytes: | |
160 | ecard_task_readbytes(req); | |
161 | break; | |
162 | ||
163 | case req_reset: | |
164 | ecard_task_reset(req); | |
165 | break; | |
166 | } | |
167 | } | |
168 | ||
169 | /* | |
170 | * On 26-bit processors, we don't need the kcardd thread to access the | |
171 | * expansion card loaders. We do it directly. | |
172 | */ | |
173 | #define ecard_call(req) ecard_do_request(req) | |
174 | ||
175 | /* ======================= Mid-level card control ===================== */ | |
176 | ||
177 | static void | |
178 | ecard_readbytes(void *addr, ecard_t *ec, int off, int len, int useld) | |
179 | { | |
180 | struct ecard_request req; | |
181 | ||
182 | req.req = req_readbytes; | |
183 | req.ec = ec; | |
184 | req.address = off; | |
185 | req.length = len; | |
186 | req.use_loader = useld; | |
187 | req.buffer = addr; | |
188 | ||
189 | ecard_call(&req); | |
190 | } | |
191 | ||
192 | int ecard_readchunk(struct in_chunk_dir *cd, ecard_t *ec, int id, int num) | |
193 | { | |
194 | struct ex_chunk_dir excd; | |
195 | int index = 16; | |
196 | int useld = 0; | |
197 | ||
198 | if (!ec->cid.cd) | |
199 | return 0; | |
200 | ||
201 | while(1) { | |
202 | ecard_readbytes(&excd, ec, index, 8, useld); | |
203 | index += 8; | |
204 | if (c_id(&excd) == 0) { | |
205 | if (!useld && ec->loader) { | |
206 | useld = 1; | |
207 | index = 0; | |
208 | continue; | |
209 | } | |
210 | return 0; | |
211 | } | |
212 | if (c_id(&excd) == 0xf0) { /* link */ | |
213 | index = c_start(&excd); | |
214 | continue; | |
215 | } | |
216 | if (c_id(&excd) == 0x80) { /* loader */ | |
217 | if (!ec->loader) { | |
5cbded58 | 218 | ec->loader = kmalloc(c_len(&excd), |
1da177e4 LT |
219 | GFP_KERNEL); |
220 | if (ec->loader) | |
221 | ecard_readbytes(ec->loader, ec, | |
222 | (int)c_start(&excd), | |
223 | c_len(&excd), useld); | |
224 | else | |
225 | return 0; | |
226 | } | |
227 | continue; | |
228 | } | |
229 | if (c_id(&excd) == id && num-- == 0) | |
230 | break; | |
231 | } | |
232 | ||
233 | if (c_id(&excd) & 0x80) { | |
234 | switch (c_id(&excd) & 0x70) { | |
235 | case 0x70: | |
236 | ecard_readbytes((unsigned char *)excd.d.string, ec, | |
237 | (int)c_start(&excd), c_len(&excd), | |
238 | useld); | |
239 | break; | |
240 | case 0x00: | |
241 | break; | |
242 | } | |
243 | } | |
244 | cd->start_offset = c_start(&excd); | |
245 | memcpy(cd->d.string, excd.d.string, 256); | |
246 | return 1; | |
247 | } | |
248 | ||
249 | /* ======================= Interrupt control ============================ */ | |
250 | ||
251 | static void ecard_def_irq_enable(ecard_t *ec, int irqnr) | |
252 | { | |
253 | } | |
254 | ||
255 | static void ecard_def_irq_disable(ecard_t *ec, int irqnr) | |
256 | { | |
257 | } | |
258 | ||
259 | static int ecard_def_irq_pending(ecard_t *ec) | |
260 | { | |
261 | return !ec->irqmask || ec->irqaddr[0] & ec->irqmask; | |
262 | } | |
263 | ||
264 | static void ecard_def_fiq_enable(ecard_t *ec, int fiqnr) | |
265 | { | |
266 | panic("ecard_def_fiq_enable called - impossible"); | |
267 | } | |
268 | ||
269 | static void ecard_def_fiq_disable(ecard_t *ec, int fiqnr) | |
270 | { | |
271 | panic("ecard_def_fiq_disable called - impossible"); | |
272 | } | |
273 | ||
274 | static int ecard_def_fiq_pending(ecard_t *ec) | |
275 | { | |
276 | return !ec->fiqmask || ec->fiqaddr[0] & ec->fiqmask; | |
277 | } | |
278 | ||
279 | static expansioncard_ops_t ecard_default_ops = { | |
280 | ecard_def_irq_enable, | |
281 | ecard_def_irq_disable, | |
282 | ecard_def_irq_pending, | |
283 | ecard_def_fiq_enable, | |
284 | ecard_def_fiq_disable, | |
285 | ecard_def_fiq_pending | |
286 | }; | |
287 | ||
288 | /* | |
289 | * Enable and disable interrupts from expansion cards. | |
290 | * (interrupts are disabled for these functions). | |
291 | * | |
292 | * They are not meant to be called directly, but via enable/disable_irq. | |
293 | */ | |
294 | static void ecard_irq_unmask(unsigned int irqnr) | |
295 | { | |
296 | ecard_t *ec = slot_to_ecard(irqnr - 32); | |
297 | ||
298 | if (ec) { | |
299 | if (!ec->ops) | |
300 | ec->ops = &ecard_default_ops; | |
301 | ||
302 | if (ec->claimed && ec->ops->irqenable) | |
303 | ec->ops->irqenable(ec, irqnr); | |
304 | else | |
305 | printk(KERN_ERR "ecard: rejecting request to " | |
306 | "enable IRQs for %d\n", irqnr); | |
307 | } | |
308 | } | |
309 | ||
310 | static void ecard_irq_mask(unsigned int irqnr) | |
311 | { | |
312 | ecard_t *ec = slot_to_ecard(irqnr - 32); | |
313 | ||
314 | if (ec) { | |
315 | if (!ec->ops) | |
316 | ec->ops = &ecard_default_ops; | |
317 | ||
318 | if (ec->ops && ec->ops->irqdisable) | |
319 | ec->ops->irqdisable(ec, irqnr); | |
320 | } | |
321 | } | |
322 | ||
323 | static struct irqchip ecard_chip = { | |
324 | .ack = ecard_irq_mask, | |
325 | .mask = ecard_irq_mask, | |
326 | .unmask = ecard_irq_unmask, | |
327 | }; | |
328 | ||
329 | void ecard_enablefiq(unsigned int fiqnr) | |
330 | { | |
331 | ecard_t *ec = slot_to_ecard(fiqnr); | |
332 | ||
333 | if (ec) { | |
334 | if (!ec->ops) | |
335 | ec->ops = &ecard_default_ops; | |
336 | ||
337 | if (ec->claimed && ec->ops->fiqenable) | |
338 | ec->ops->fiqenable(ec, fiqnr); | |
339 | else | |
340 | printk(KERN_ERR "ecard: rejecting request to " | |
341 | "enable FIQs for %d\n", fiqnr); | |
342 | } | |
343 | } | |
344 | ||
345 | void ecard_disablefiq(unsigned int fiqnr) | |
346 | { | |
347 | ecard_t *ec = slot_to_ecard(fiqnr); | |
348 | ||
349 | if (ec) { | |
350 | if (!ec->ops) | |
351 | ec->ops = &ecard_default_ops; | |
352 | ||
353 | if (ec->ops->fiqdisable) | |
354 | ec->ops->fiqdisable(ec, fiqnr); | |
355 | } | |
356 | } | |
357 | ||
358 | static void | |
359 | ecard_dump_irq_state(ecard_t *ec) | |
360 | { | |
361 | printk(" %d: %sclaimed, ", | |
362 | ec->slot_no, | |
363 | ec->claimed ? "" : "not "); | |
364 | ||
365 | if (ec->ops && ec->ops->irqpending && | |
366 | ec->ops != &ecard_default_ops) | |
367 | printk("irq %spending\n", | |
368 | ec->ops->irqpending(ec) ? "" : "not "); | |
369 | else | |
370 | printk("irqaddr %p, mask = %02X, status = %02X\n", | |
371 | ec->irqaddr, ec->irqmask, *ec->irqaddr); | |
372 | } | |
373 | ||
374 | static void ecard_check_lockup(struct irqdesc *desc) | |
375 | { | |
376 | static int last, lockup; | |
377 | ecard_t *ec; | |
378 | ||
379 | /* | |
380 | * If the timer interrupt has not run since the last million | |
381 | * unrecognised expansion card interrupts, then there is | |
382 | * something seriously wrong. Disable the expansion card | |
383 | * interrupts so at least we can continue. | |
384 | * | |
385 | * Maybe we ought to start a timer to re-enable them some time | |
386 | * later? | |
387 | */ | |
388 | if (last == jiffies) { | |
389 | lockup += 1; | |
390 | if (lockup > 1000000) { | |
391 | printk(KERN_ERR "\nInterrupt lockup detected - " | |
392 | "disabling all expansion card interrupts\n"); | |
393 | ||
394 | desc->chip->mask(IRQ_EXPANSIONCARD); | |
395 | ||
396 | printk("Expansion card IRQ state:\n"); | |
397 | ||
398 | for (ec = cards; ec; ec = ec->next) | |
399 | ecard_dump_irq_state(ec); | |
400 | } | |
401 | } else | |
402 | lockup = 0; | |
403 | ||
404 | /* | |
405 | * If we did not recognise the source of this interrupt, | |
406 | * warn the user, but don't flood the user with these messages. | |
407 | */ | |
408 | if (!last || time_after(jiffies, (unsigned long)(last + 5*HZ))) { | |
409 | last = jiffies; | |
410 | printk(KERN_WARNING "Unrecognised interrupt from backplane\n"); | |
411 | } | |
412 | } | |
413 | ||
414 | static void | |
415 | ecard_irq_handler(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs) | |
416 | { | |
417 | ecard_t *ec; | |
418 | int called = 0; | |
419 | ||
420 | desc->chip->mask(irq); | |
421 | for (ec = cards; ec; ec = ec->next) { | |
422 | int pending; | |
423 | ||
424 | if (!ec->claimed || ec->irq == NO_IRQ) | |
425 | continue; | |
426 | ||
427 | if (ec->ops && ec->ops->irqpending) | |
428 | pending = ec->ops->irqpending(ec); | |
429 | else | |
430 | pending = ecard_default_ops.irqpending(ec); | |
431 | ||
432 | if (pending) { | |
433 | struct irqdesc *d = irq_desc + ec->irq; | |
434 | d->handle(ec->irq, d, regs); | |
435 | called ++; | |
436 | } | |
437 | } | |
438 | desc->chip->unmask(irq); | |
439 | ||
440 | if (called == 0) | |
441 | ecard_check_lockup(desc); | |
442 | } | |
443 | ||
444 | #define ecard_irqexp_handler NULL | |
445 | #define ecard_probeirqhw() (0) | |
446 | ||
447 | unsigned int ecard_address(ecard_t *ec, card_type_t type, card_speed_t speed) | |
448 | { | |
449 | unsigned long address = 0; | |
450 | int slot = ec->slot_no; | |
451 | ||
452 | ectcr &= ~(1 << slot); | |
453 | ||
454 | switch (type) { | |
455 | case ECARD_MEMC: | |
456 | address = IO_EC_MEMC_BASE + (slot << 12); | |
457 | break; | |
458 | ||
459 | case ECARD_IOC: | |
460 | address = IO_EC_IOC_BASE + (slot << 12) + (speed << 17); | |
461 | break; | |
462 | ||
463 | default: | |
464 | break; | |
465 | } | |
466 | ||
467 | return address; | |
468 | } | |
469 | ||
470 | static int ecard_prints(char *buffer, ecard_t *ec) | |
471 | { | |
472 | char *start = buffer; | |
473 | ||
474 | buffer += sprintf(buffer, " %d: ", ec->slot_no); | |
475 | ||
476 | if (ec->cid.id == 0) { | |
477 | struct in_chunk_dir incd; | |
478 | ||
479 | buffer += sprintf(buffer, "[%04X:%04X] ", | |
480 | ec->cid.manufacturer, ec->cid.product); | |
481 | ||
482 | if (!ec->card_desc && ec->cid.cd && | |
483 | ecard_readchunk(&incd, ec, 0xf5, 0)) { | |
484 | ec->card_desc = kmalloc(strlen(incd.d.string)+1, GFP_KERNEL); | |
485 | ||
486 | if (ec->card_desc) | |
487 | strcpy((char *)ec->card_desc, incd.d.string); | |
488 | } | |
489 | ||
490 | buffer += sprintf(buffer, "%s\n", ec->card_desc ? ec->card_desc : "*unknown*"); | |
491 | } else | |
492 | buffer += sprintf(buffer, "Simple card %d\n", ec->cid.id); | |
493 | ||
494 | return buffer - start; | |
495 | } | |
496 | ||
497 | static int get_ecard_dev_info(char *buf, char **start, off_t pos, int count) | |
498 | { | |
499 | ecard_t *ec = cards; | |
500 | off_t at = 0; | |
501 | int len, cnt; | |
502 | ||
503 | cnt = 0; | |
504 | while (ec && count > cnt) { | |
505 | len = ecard_prints(buf, ec); | |
506 | at += len; | |
507 | if (at >= pos) { | |
508 | if (!*start) { | |
509 | *start = buf + (pos - (at - len)); | |
510 | cnt = at - pos; | |
511 | } else | |
512 | cnt += len; | |
513 | buf += len; | |
514 | } | |
515 | ec = ec->next; | |
516 | } | |
517 | return (count > cnt) ? cnt : count; | |
518 | } | |
519 | ||
520 | static struct proc_dir_entry *proc_bus_ecard_dir = NULL; | |
521 | ||
522 | static void ecard_proc_init(void) | |
523 | { | |
524 | proc_bus_ecard_dir = proc_mkdir("ecard", proc_bus); | |
525 | create_proc_info_entry("devices", 0, proc_bus_ecard_dir, | |
526 | get_ecard_dev_info); | |
527 | } | |
528 | ||
529 | #define ec_set_resource(ec,nr,st,sz,flg) \ | |
530 | do { \ | |
531 | (ec)->resource[nr].name = ec->dev.bus_id; \ | |
532 | (ec)->resource[nr].start = st; \ | |
533 | (ec)->resource[nr].end = (st) + (sz) - 1; \ | |
534 | (ec)->resource[nr].flags = flg; \ | |
535 | } while (0) | |
536 | ||
537 | static void __init ecard_init_resources(struct expansion_card *ec) | |
538 | { | |
539 | unsigned long base = PODSLOT_IOC0_BASE; | |
540 | unsigned int slot = ec->slot_no; | |
541 | int i; | |
542 | ||
543 | ec_set_resource(ec, ECARD_RES_MEMC, | |
544 | PODSLOT_MEMC_BASE + (slot << 14), | |
545 | PODSLOT_MEMC_SIZE, IORESOURCE_MEM); | |
546 | ||
547 | for (i = 0; i < ECARD_RES_IOCSYNC - ECARD_RES_IOCSLOW; i++) { | |
548 | ec_set_resource(ec, i + ECARD_RES_IOCSLOW, | |
549 | base + (slot << 14) + (i << 19), | |
550 | PODSLOT_IOC_SIZE, IORESOURCE_MEM); | |
551 | } | |
552 | ||
553 | for (i = 0; i < ECARD_NUM_RESOURCES; i++) { | |
554 | if (ec->resource[i].start && | |
555 | request_resource(&iomem_resource, &ec->resource[i])) { | |
556 | printk(KERN_ERR "%s: resource(s) not available\n", | |
557 | ec->dev.bus_id); | |
558 | ec->resource[i].end -= ec->resource[i].start; | |
559 | ec->resource[i].start = 0; | |
560 | } | |
561 | } | |
562 | } | |
563 | ||
ff381d22 | 564 | static ssize_t ecard_show_irq(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
565 | { |
566 | struct expansion_card *ec = ECARD_DEV(dev); | |
567 | return sprintf(buf, "%u\n", ec->irq); | |
568 | } | |
569 | ||
ff381d22 | 570 | static ssize_t ecard_show_vendor(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
571 | { |
572 | struct expansion_card *ec = ECARD_DEV(dev); | |
573 | return sprintf(buf, "%u\n", ec->cid.manufacturer); | |
574 | } | |
575 | ||
ff381d22 | 576 | static ssize_t ecard_show_device(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
577 | { |
578 | struct expansion_card *ec = ECARD_DEV(dev); | |
579 | return sprintf(buf, "%u\n", ec->cid.product); | |
580 | } | |
581 | ||
ff381d22 | 582 | static ssize_t ecard_show_dma(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
583 | { |
584 | struct expansion_card *ec = ECARD_DEV(dev); | |
585 | return sprintf(buf, "%u\n", ec->dma); | |
586 | } | |
587 | ||
ff381d22 | 588 | static ssize_t ecard_show_resources(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
589 | { |
590 | struct expansion_card *ec = ECARD_DEV(dev); | |
591 | char *str = buf; | |
592 | int i; | |
593 | ||
594 | for (i = 0; i < ECARD_NUM_RESOURCES; i++) | |
595 | str += sprintf(str, "%08lx %08lx %08lx\n", | |
596 | ec->resource[i].start, | |
597 | ec->resource[i].end, | |
598 | ec->resource[i].flags); | |
599 | ||
600 | return str - buf; | |
601 | } | |
602 | ||
603 | static DEVICE_ATTR(irq, S_IRUGO, ecard_show_irq, NULL); | |
604 | static DEVICE_ATTR(vendor, S_IRUGO, ecard_show_vendor, NULL); | |
605 | static DEVICE_ATTR(device, S_IRUGO, ecard_show_device, NULL); | |
606 | static DEVICE_ATTR(dma, S_IRUGO, ecard_show_dma, NULL); | |
607 | static DEVICE_ATTR(resource, S_IRUGO, ecard_show_resources, NULL); | |
608 | ||
609 | /* | |
610 | * Probe for an expansion card. | |
611 | * | |
612 | * If bit 1 of the first byte of the card is set, then the | |
613 | * card does not exist. | |
614 | */ | |
615 | static int __init | |
616 | ecard_probe(int slot, card_type_t type) | |
617 | { | |
618 | ecard_t **ecp; | |
619 | ecard_t *ec; | |
620 | struct ex_ecid cid; | |
621 | int i, rc = -ENOMEM; | |
622 | ||
a0172a6d | 623 | ec = kzalloc(sizeof(ecard_t), GFP_KERNEL); |
1da177e4 LT |
624 | if (!ec) |
625 | goto nomem; | |
626 | ||
1da177e4 LT |
627 | ec->slot_no = slot; |
628 | ec->type = type; | |
629 | ec->irq = NO_IRQ; | |
630 | ec->fiq = NO_IRQ; | |
631 | ec->dma = NO_DMA; | |
632 | ec->card_desc = NULL; | |
633 | ec->ops = &ecard_default_ops; | |
634 | ||
635 | rc = -ENODEV; | |
636 | if ((ec->podaddr = ecard_address(ec, type, ECARD_SYNC)) == 0) | |
637 | goto nodev; | |
638 | ||
639 | cid.r_zero = 1; | |
640 | ecard_readbytes(&cid, ec, 0, 16, 0); | |
641 | if (cid.r_zero) | |
642 | goto nodev; | |
643 | ||
644 | ec->cid.id = cid.r_id; | |
645 | ec->cid.cd = cid.r_cd; | |
646 | ec->cid.is = cid.r_is; | |
647 | ec->cid.w = cid.r_w; | |
648 | ec->cid.manufacturer = ecard_getu16(cid.r_manu); | |
649 | ec->cid.product = ecard_getu16(cid.r_prod); | |
650 | ec->cid.country = cid.r_country; | |
651 | ec->cid.irqmask = cid.r_irqmask; | |
652 | ec->cid.irqoff = ecard_gets24(cid.r_irqoff); | |
653 | ec->cid.fiqmask = cid.r_fiqmask; | |
654 | ec->cid.fiqoff = ecard_gets24(cid.r_fiqoff); | |
655 | ec->fiqaddr = | |
656 | ec->irqaddr = (unsigned char *)ioaddr(ec->podaddr); | |
657 | ||
658 | if (ec->cid.is) { | |
659 | ec->irqmask = ec->cid.irqmask; | |
660 | ec->irqaddr += ec->cid.irqoff; | |
661 | ec->fiqmask = ec->cid.fiqmask; | |
662 | ec->fiqaddr += ec->cid.fiqoff; | |
663 | } else { | |
664 | ec->irqmask = 1; | |
665 | ec->fiqmask = 4; | |
666 | } | |
667 | ||
668 | for (i = 0; i < sizeof(blacklist) / sizeof(*blacklist); i++) | |
669 | if (blacklist[i].manufacturer == ec->cid.manufacturer && | |
670 | blacklist[i].product == ec->cid.product) { | |
671 | ec->card_desc = blacklist[i].type; | |
672 | break; | |
673 | } | |
674 | ||
675 | snprintf(ec->dev.bus_id, sizeof(ec->dev.bus_id), "ecard%d", slot); | |
676 | ec->dev.parent = NULL; | |
677 | ec->dev.bus = &ecard_bus_type; | |
678 | ec->dev.dma_mask = &ec->dma_mask; | |
679 | ec->dma_mask = (u64)0xffffffff; | |
680 | ||
681 | ecard_init_resources(ec); | |
682 | ||
683 | /* | |
684 | * hook the interrupt handlers | |
685 | */ | |
686 | ec->irq = 32 + slot; | |
687 | set_irq_chip(ec->irq, &ecard_chip); | |
688 | set_irq_handler(ec->irq, do_level_IRQ); | |
689 | set_irq_flags(ec->irq, IRQF_VALID); | |
690 | ||
691 | for (ecp = &cards; *ecp; ecp = &(*ecp)->next); | |
692 | ||
693 | *ecp = ec; | |
694 | slot_to_expcard[slot] = ec; | |
695 | ||
696 | device_register(&ec->dev); | |
697 | device_create_file(&ec->dev, &dev_attr_dma); | |
698 | device_create_file(&ec->dev, &dev_attr_irq); | |
699 | device_create_file(&ec->dev, &dev_attr_resource); | |
700 | device_create_file(&ec->dev, &dev_attr_vendor); | |
701 | device_create_file(&ec->dev, &dev_attr_device); | |
702 | ||
703 | return 0; | |
704 | ||
705 | nodev: | |
706 | kfree(ec); | |
707 | nomem: | |
708 | return rc; | |
709 | } | |
710 | ||
711 | /* | |
712 | * Initialise the expansion card system. | |
713 | * Locate all hardware - interrupt management and | |
714 | * actual cards. | |
715 | */ | |
716 | static int __init ecard_init(void) | |
717 | { | |
718 | int slot, irqhw; | |
719 | ||
720 | printk("Probing expansion cards\n"); | |
721 | ||
722 | for (slot = 0; slot < MAX_ECARDS; slot ++) { | |
723 | ecard_probe(slot, ECARD_IOC); | |
724 | } | |
725 | ||
726 | irqhw = ecard_probeirqhw(); | |
727 | ||
728 | set_irq_chained_handler(IRQ_EXPANSIONCARD, | |
729 | irqhw ? ecard_irqexp_handler : ecard_irq_handler); | |
730 | ||
731 | ecard_proc_init(); | |
732 | ||
733 | return 0; | |
734 | } | |
735 | ||
736 | subsys_initcall(ecard_init); | |
737 | ||
738 | /* | |
739 | * ECARD "bus" | |
740 | */ | |
741 | static const struct ecard_id * | |
742 | ecard_match_device(const struct ecard_id *ids, struct expansion_card *ec) | |
743 | { | |
744 | int i; | |
745 | ||
746 | for (i = 0; ids[i].manufacturer != 65535; i++) | |
747 | if (ec->cid.manufacturer == ids[i].manufacturer && | |
748 | ec->cid.product == ids[i].product) | |
749 | return ids + i; | |
750 | ||
751 | return NULL; | |
752 | } | |
753 | ||
754 | static int ecard_drv_probe(struct device *dev) | |
755 | { | |
756 | struct expansion_card *ec = ECARD_DEV(dev); | |
757 | struct ecard_driver *drv = ECARD_DRV(dev->driver); | |
758 | const struct ecard_id *id; | |
759 | int ret; | |
760 | ||
761 | id = ecard_match_device(drv->id_table, ec); | |
762 | ||
763 | ecard_claim(ec); | |
764 | ret = drv->probe(ec, id); | |
765 | if (ret) | |
766 | ecard_release(ec); | |
767 | return ret; | |
768 | } | |
769 | ||
770 | static int ecard_drv_remove(struct device *dev) | |
771 | { | |
772 | struct expansion_card *ec = ECARD_DEV(dev); | |
773 | struct ecard_driver *drv = ECARD_DRV(dev->driver); | |
774 | ||
775 | drv->remove(ec); | |
776 | ecard_release(ec); | |
777 | ||
778 | return 0; | |
779 | } | |
780 | ||
781 | /* | |
782 | * Before rebooting, we must make sure that the expansion card is in a | |
783 | * sensible state, so it can be re-detected. This means that the first | |
784 | * page of the ROM must be visible. We call the expansion cards reset | |
785 | * handler, if any. | |
786 | */ | |
787 | static void ecard_drv_shutdown(struct device *dev) | |
788 | { | |
789 | struct expansion_card *ec = ECARD_DEV(dev); | |
790 | struct ecard_driver *drv = ECARD_DRV(dev->driver); | |
791 | struct ecard_request req; | |
792 | ||
793 | if (drv->shutdown) | |
794 | drv->shutdown(ec); | |
795 | ecard_release(ec); | |
796 | req.req = req_reset; | |
797 | req.ec = ec; | |
798 | ecard_call(&req); | |
799 | } | |
800 | ||
801 | int ecard_register_driver(struct ecard_driver *drv) | |
802 | { | |
803 | drv->drv.bus = &ecard_bus_type; | |
804 | drv->drv.probe = ecard_drv_probe; | |
805 | drv->drv.remove = ecard_drv_remove; | |
806 | drv->drv.shutdown = ecard_drv_shutdown; | |
807 | ||
808 | return driver_register(&drv->drv); | |
809 | } | |
810 | ||
811 | void ecard_remove_driver(struct ecard_driver *drv) | |
812 | { | |
813 | driver_unregister(&drv->drv); | |
814 | } | |
815 | ||
816 | static int ecard_match(struct device *_dev, struct device_driver *_drv) | |
817 | { | |
818 | struct expansion_card *ec = ECARD_DEV(_dev); | |
819 | struct ecard_driver *drv = ECARD_DRV(_drv); | |
820 | int ret; | |
821 | ||
822 | if (drv->id_table) { | |
823 | ret = ecard_match_device(drv->id_table, ec) != NULL; | |
824 | } else { | |
825 | ret = ec->cid.id == drv->id; | |
826 | } | |
827 | ||
828 | return ret; | |
829 | } | |
830 | ||
831 | struct bus_type ecard_bus_type = { | |
832 | .name = "ecard", | |
833 | .match = ecard_match, | |
834 | }; | |
835 | ||
836 | static int ecard_bus_init(void) | |
837 | { | |
838 | return bus_register(&ecard_bus_type); | |
839 | } | |
840 | ||
841 | postcore_initcall(ecard_bus_init); | |
842 | ||
843 | EXPORT_SYMBOL(ecard_readchunk); | |
844 | EXPORT_SYMBOL(ecard_address); | |
845 | EXPORT_SYMBOL(ecard_register_driver); | |
846 | EXPORT_SYMBOL(ecard_remove_driver); | |
847 | EXPORT_SYMBOL(ecard_bus_type); |