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1da177e4 LT |
1 | /* |
2 | * linux/arch/arm/kernel/ecard.c | |
3 | * | |
4 | * Copyright 1995-2001 Russell King | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | * | |
10 | * Find all installed expansion cards, and handle interrupts from them. | |
11 | * | |
12 | * Created from information from Acorns RiscOS3 PRMs | |
13 | * | |
14 | * 08-Dec-1996 RMK Added code for the 9'th expansion card - the ether | |
15 | * podule slot. | |
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 | * 15-Feb-1998 RMK Added DMA support | |
24 | * 12-Sep-1998 RMK Added EASI support | |
25 | * 10-Jan-1999 RMK Run loaders in a simulated RISC OS environment. | |
26 | * 17-Apr-1999 RMK Support for EASI Type C cycles. | |
27 | */ | |
28 | #define ECARD_C | |
29 | ||
1da177e4 LT |
30 | #include <linux/module.h> |
31 | #include <linux/kernel.h> | |
32 | #include <linux/types.h> | |
33 | #include <linux/sched.h> | |
34 | #include <linux/interrupt.h> | |
35 | #include <linux/completion.h> | |
36 | #include <linux/reboot.h> | |
37 | #include <linux/mm.h> | |
38 | #include <linux/slab.h> | |
39 | #include <linux/proc_fs.h> | |
9b001212 | 40 | #include <linux/seq_file.h> |
1da177e4 LT |
41 | #include <linux/device.h> |
42 | #include <linux/init.h> | |
00431707 | 43 | #include <linux/mutex.h> |
134c99e9 | 44 | #include <linux/kthread.h> |
10bdaaa0 | 45 | #include <linux/io.h> |
1da177e4 LT |
46 | |
47 | #include <asm/dma.h> | |
48 | #include <asm/ecard.h> | |
a09e64fb | 49 | #include <mach/hardware.h> |
1da177e4 LT |
50 | #include <asm/irq.h> |
51 | #include <asm/mmu_context.h> | |
52 | #include <asm/mach/irq.h> | |
53 | #include <asm/tlbflush.h> | |
54 | ||
c0b04d1b RK |
55 | #include "ecard.h" |
56 | ||
1da177e4 LT |
57 | #ifndef CONFIG_ARCH_RPC |
58 | #define HAVE_EXPMASK | |
59 | #endif | |
60 | ||
61 | struct ecard_request { | |
62 | void (*fn)(struct ecard_request *); | |
63 | ecard_t *ec; | |
64 | unsigned int address; | |
65 | unsigned int length; | |
66 | unsigned int use_loader; | |
67 | void *buffer; | |
68 | struct completion *complete; | |
69 | }; | |
70 | ||
71 | struct expcard_blacklist { | |
72 | unsigned short manufacturer; | |
73 | unsigned short product; | |
74 | const char *type; | |
75 | }; | |
76 | ||
77 | static ecard_t *cards; | |
78 | static ecard_t *slot_to_expcard[MAX_ECARDS]; | |
79 | static unsigned int ectcr; | |
80 | #ifdef HAS_EXPMASK | |
81 | static unsigned int have_expmask; | |
82 | #endif | |
83 | ||
84 | /* List of descriptions of cards which don't have an extended | |
85 | * identification, or chunk directories containing a description. | |
86 | */ | |
87 | static struct expcard_blacklist __initdata blacklist[] = { | |
88 | { MANU_ACORN, PROD_ACORN_ETHER1, "Acorn Ether1" } | |
89 | }; | |
90 | ||
91 | asmlinkage extern int | |
92 | ecard_loader_reset(unsigned long base, loader_t loader); | |
93 | asmlinkage extern int | |
94 | ecard_loader_read(int off, unsigned long base, loader_t loader); | |
95 | ||
96 | static inline unsigned short ecard_getu16(unsigned char *v) | |
97 | { | |
98 | return v[0] | v[1] << 8; | |
99 | } | |
100 | ||
101 | static inline signed long ecard_gets24(unsigned char *v) | |
102 | { | |
103 | return v[0] | v[1] << 8 | v[2] << 16 | ((v[2] & 0x80) ? 0xff000000 : 0); | |
104 | } | |
105 | ||
106 | static inline ecard_t *slot_to_ecard(unsigned int slot) | |
107 | { | |
108 | return slot < MAX_ECARDS ? slot_to_expcard[slot] : NULL; | |
109 | } | |
110 | ||
111 | /* ===================== Expansion card daemon ======================== */ | |
112 | /* | |
113 | * Since the loader programs on the expansion cards need to be run | |
114 | * in a specific environment, create a separate task with this | |
115 | * environment up, and pass requests to this task as and when we | |
116 | * need to. | |
117 | * | |
118 | * This should allow 99% of loaders to be called from Linux. | |
119 | * | |
120 | * From a security standpoint, we trust the card vendors. This | |
121 | * may be a misplaced trust. | |
122 | */ | |
123 | static void ecard_task_reset(struct ecard_request *req) | |
124 | { | |
125 | struct expansion_card *ec = req->ec; | |
126 | struct resource *res; | |
127 | ||
128 | res = ec->slot_no == 8 | |
129 | ? &ec->resource[ECARD_RES_MEMC] | |
5559bca8 | 130 | : ec->easi |
1da177e4 LT |
131 | ? &ec->resource[ECARD_RES_EASI] |
132 | : &ec->resource[ECARD_RES_IOCSYNC]; | |
133 | ||
134 | ecard_loader_reset(res->start, ec->loader); | |
135 | } | |
136 | ||
137 | static void ecard_task_readbytes(struct ecard_request *req) | |
138 | { | |
139 | struct expansion_card *ec = req->ec; | |
140 | unsigned char *buf = req->buffer; | |
141 | unsigned int len = req->length; | |
142 | unsigned int off = req->address; | |
143 | ||
144 | if (ec->slot_no == 8) { | |
145 | void __iomem *base = (void __iomem *) | |
146 | ec->resource[ECARD_RES_MEMC].start; | |
147 | ||
148 | /* | |
149 | * The card maintains an index which increments the address | |
150 | * into a 4096-byte page on each access. We need to keep | |
151 | * track of the counter. | |
152 | */ | |
153 | static unsigned int index; | |
154 | unsigned int page; | |
155 | ||
156 | page = (off >> 12) * 4; | |
157 | if (page > 256 * 4) | |
158 | return; | |
159 | ||
160 | off &= 4095; | |
161 | ||
162 | /* | |
163 | * If we are reading offset 0, or our current index is | |
164 | * greater than the offset, reset the hardware index counter. | |
165 | */ | |
166 | if (off == 0 || index > off) { | |
167 | writeb(0, base); | |
168 | index = 0; | |
169 | } | |
170 | ||
171 | /* | |
172 | * Increment the hardware index counter until we get to the | |
173 | * required offset. The read bytes are discarded. | |
174 | */ | |
175 | while (index < off) { | |
176 | readb(base + page); | |
177 | index += 1; | |
178 | } | |
179 | ||
180 | while (len--) { | |
181 | *buf++ = readb(base + page); | |
182 | index += 1; | |
183 | } | |
184 | } else { | |
5559bca8 | 185 | unsigned long base = (ec->easi |
1da177e4 LT |
186 | ? &ec->resource[ECARD_RES_EASI] |
187 | : &ec->resource[ECARD_RES_IOCSYNC])->start; | |
188 | void __iomem *pbase = (void __iomem *)base; | |
189 | ||
190 | if (!req->use_loader || !ec->loader) { | |
191 | off *= 4; | |
192 | while (len--) { | |
193 | *buf++ = readb(pbase + off); | |
194 | off += 4; | |
195 | } | |
196 | } else { | |
197 | while(len--) { | |
198 | /* | |
199 | * The following is required by some | |
200 | * expansion card loader programs. | |
201 | */ | |
202 | *(unsigned long *)0x108 = 0; | |
203 | *buf++ = ecard_loader_read(off++, base, | |
204 | ec->loader); | |
205 | } | |
206 | } | |
207 | } | |
208 | ||
209 | } | |
210 | ||
211 | static DECLARE_WAIT_QUEUE_HEAD(ecard_wait); | |
212 | static struct ecard_request *ecard_req; | |
00431707 | 213 | static DEFINE_MUTEX(ecard_mutex); |
1da177e4 LT |
214 | |
215 | /* | |
216 | * Set up the expansion card daemon's page tables. | |
217 | */ | |
218 | static void ecard_init_pgtables(struct mm_struct *mm) | |
219 | { | |
220 | struct vm_area_struct vma; | |
221 | ||
222 | /* We want to set up the page tables for the following mapping: | |
223 | * Virtual Physical | |
224 | * 0x03000000 0x03000000 | |
225 | * 0x03010000 unmapped | |
226 | * 0x03210000 0x03210000 | |
227 | * 0x03400000 unmapped | |
228 | * 0x08000000 0x08000000 | |
229 | * 0x10000000 unmapped | |
230 | * | |
231 | * FIXME: we don't follow this 100% yet. | |
232 | */ | |
233 | pgd_t *src_pgd, *dst_pgd; | |
234 | ||
235 | src_pgd = pgd_offset(mm, (unsigned long)IO_BASE); | |
236 | dst_pgd = pgd_offset(mm, IO_START); | |
237 | ||
238 | memcpy(dst_pgd, src_pgd, sizeof(pgd_t) * (IO_SIZE / PGDIR_SIZE)); | |
239 | ||
5e4cdb83 | 240 | src_pgd = pgd_offset(mm, (unsigned long)EASI_BASE); |
1da177e4 LT |
241 | dst_pgd = pgd_offset(mm, EASI_START); |
242 | ||
243 | memcpy(dst_pgd, src_pgd, sizeof(pgd_t) * (EASI_SIZE / PGDIR_SIZE)); | |
244 | ||
245 | vma.vm_mm = mm; | |
246 | ||
247 | flush_tlb_range(&vma, IO_START, IO_START + IO_SIZE); | |
248 | flush_tlb_range(&vma, EASI_START, EASI_START + EASI_SIZE); | |
249 | } | |
250 | ||
251 | static int ecard_init_mm(void) | |
252 | { | |
253 | struct mm_struct * mm = mm_alloc(); | |
254 | struct mm_struct *active_mm = current->active_mm; | |
255 | ||
256 | if (!mm) | |
257 | return -ENOMEM; | |
258 | ||
259 | current->mm = mm; | |
260 | current->active_mm = mm; | |
261 | activate_mm(active_mm, mm); | |
262 | mmdrop(active_mm); | |
263 | ecard_init_pgtables(mm); | |
264 | return 0; | |
265 | } | |
266 | ||
267 | static int | |
268 | ecard_task(void * unused) | |
269 | { | |
1da177e4 LT |
270 | /* |
271 | * Allocate a mm. We're not a lazy-TLB kernel task since we need | |
272 | * to set page table entries where the user space would be. Note | |
273 | * that this also creates the page tables. Failure is not an | |
274 | * option here. | |
275 | */ | |
276 | if (ecard_init_mm()) | |
277 | panic("kecardd: unable to alloc mm\n"); | |
278 | ||
279 | while (1) { | |
280 | struct ecard_request *req; | |
281 | ||
282 | wait_event_interruptible(ecard_wait, ecard_req != NULL); | |
283 | ||
284 | req = xchg(&ecard_req, NULL); | |
285 | if (req != NULL) { | |
286 | req->fn(req); | |
287 | complete(req->complete); | |
288 | } | |
289 | } | |
290 | } | |
291 | ||
292 | /* | |
293 | * Wake the expansion card daemon to action our request. | |
294 | * | |
295 | * FIXME: The test here is not sufficient to detect if the | |
296 | * kcardd is running. | |
297 | */ | |
298 | static void ecard_call(struct ecard_request *req) | |
299 | { | |
6e9a4738 | 300 | DECLARE_COMPLETION_ONSTACK(completion); |
1da177e4 LT |
301 | |
302 | req->complete = &completion; | |
303 | ||
00431707 | 304 | mutex_lock(&ecard_mutex); |
1da177e4 LT |
305 | ecard_req = req; |
306 | wake_up(&ecard_wait); | |
307 | ||
308 | /* | |
309 | * Now wait for kecardd to run. | |
310 | */ | |
311 | wait_for_completion(&completion); | |
00431707 | 312 | mutex_unlock(&ecard_mutex); |
1da177e4 LT |
313 | } |
314 | ||
315 | /* ======================= Mid-level card control ===================== */ | |
316 | ||
317 | static void | |
318 | ecard_readbytes(void *addr, ecard_t *ec, int off, int len, int useld) | |
319 | { | |
320 | struct ecard_request req; | |
321 | ||
322 | req.fn = ecard_task_readbytes; | |
323 | req.ec = ec; | |
324 | req.address = off; | |
325 | req.length = len; | |
326 | req.use_loader = useld; | |
327 | req.buffer = addr; | |
328 | ||
329 | ecard_call(&req); | |
330 | } | |
331 | ||
332 | int ecard_readchunk(struct in_chunk_dir *cd, ecard_t *ec, int id, int num) | |
333 | { | |
334 | struct ex_chunk_dir excd; | |
335 | int index = 16; | |
336 | int useld = 0; | |
337 | ||
338 | if (!ec->cid.cd) | |
339 | return 0; | |
340 | ||
341 | while(1) { | |
342 | ecard_readbytes(&excd, ec, index, 8, useld); | |
343 | index += 8; | |
344 | if (c_id(&excd) == 0) { | |
345 | if (!useld && ec->loader) { | |
346 | useld = 1; | |
347 | index = 0; | |
348 | continue; | |
349 | } | |
350 | return 0; | |
351 | } | |
352 | if (c_id(&excd) == 0xf0) { /* link */ | |
353 | index = c_start(&excd); | |
354 | continue; | |
355 | } | |
356 | if (c_id(&excd) == 0x80) { /* loader */ | |
357 | if (!ec->loader) { | |
5cbded58 | 358 | ec->loader = kmalloc(c_len(&excd), |
1da177e4 LT |
359 | GFP_KERNEL); |
360 | if (ec->loader) | |
361 | ecard_readbytes(ec->loader, ec, | |
362 | (int)c_start(&excd), | |
363 | c_len(&excd), useld); | |
364 | else | |
365 | return 0; | |
366 | } | |
367 | continue; | |
368 | } | |
369 | if (c_id(&excd) == id && num-- == 0) | |
370 | break; | |
371 | } | |
372 | ||
373 | if (c_id(&excd) & 0x80) { | |
374 | switch (c_id(&excd) & 0x70) { | |
375 | case 0x70: | |
376 | ecard_readbytes((unsigned char *)excd.d.string, ec, | |
377 | (int)c_start(&excd), c_len(&excd), | |
378 | useld); | |
379 | break; | |
380 | case 0x00: | |
381 | break; | |
382 | } | |
383 | } | |
384 | cd->start_offset = c_start(&excd); | |
385 | memcpy(cd->d.string, excd.d.string, 256); | |
386 | return 1; | |
387 | } | |
388 | ||
389 | /* ======================= Interrupt control ============================ */ | |
390 | ||
391 | static void ecard_def_irq_enable(ecard_t *ec, int irqnr) | |
392 | { | |
393 | #ifdef HAS_EXPMASK | |
394 | if (irqnr < 4 && have_expmask) { | |
395 | have_expmask |= 1 << irqnr; | |
396 | __raw_writeb(have_expmask, EXPMASK_ENABLE); | |
397 | } | |
398 | #endif | |
399 | } | |
400 | ||
401 | static void ecard_def_irq_disable(ecard_t *ec, int irqnr) | |
402 | { | |
403 | #ifdef HAS_EXPMASK | |
404 | if (irqnr < 4 && have_expmask) { | |
405 | have_expmask &= ~(1 << irqnr); | |
406 | __raw_writeb(have_expmask, EXPMASK_ENABLE); | |
407 | } | |
408 | #endif | |
409 | } | |
410 | ||
411 | static int ecard_def_irq_pending(ecard_t *ec) | |
412 | { | |
413 | return !ec->irqmask || readb(ec->irqaddr) & ec->irqmask; | |
414 | } | |
415 | ||
416 | static void ecard_def_fiq_enable(ecard_t *ec, int fiqnr) | |
417 | { | |
418 | panic("ecard_def_fiq_enable called - impossible"); | |
419 | } | |
420 | ||
421 | static void ecard_def_fiq_disable(ecard_t *ec, int fiqnr) | |
422 | { | |
423 | panic("ecard_def_fiq_disable called - impossible"); | |
424 | } | |
425 | ||
426 | static int ecard_def_fiq_pending(ecard_t *ec) | |
427 | { | |
428 | return !ec->fiqmask || readb(ec->fiqaddr) & ec->fiqmask; | |
429 | } | |
430 | ||
431 | static expansioncard_ops_t ecard_default_ops = { | |
432 | ecard_def_irq_enable, | |
433 | ecard_def_irq_disable, | |
434 | ecard_def_irq_pending, | |
435 | ecard_def_fiq_enable, | |
436 | ecard_def_fiq_disable, | |
437 | ecard_def_fiq_pending | |
438 | }; | |
439 | ||
440 | /* | |
441 | * Enable and disable interrupts from expansion cards. | |
442 | * (interrupts are disabled for these functions). | |
443 | * | |
444 | * They are not meant to be called directly, but via enable/disable_irq. | |
445 | */ | |
4a87bac4 | 446 | static void ecard_irq_unmask(struct irq_data *d) |
1da177e4 | 447 | { |
c402c110 | 448 | ecard_t *ec = irq_data_get_irq_chip_data(d); |
1da177e4 LT |
449 | |
450 | if (ec) { | |
451 | if (!ec->ops) | |
452 | ec->ops = &ecard_default_ops; | |
453 | ||
454 | if (ec->claimed && ec->ops->irqenable) | |
4a87bac4 | 455 | ec->ops->irqenable(ec, d->irq); |
1da177e4 LT |
456 | else |
457 | printk(KERN_ERR "ecard: rejecting request to " | |
4a87bac4 | 458 | "enable IRQs for %d\n", d->irq); |
1da177e4 LT |
459 | } |
460 | } | |
461 | ||
4a87bac4 | 462 | static void ecard_irq_mask(struct irq_data *d) |
1da177e4 | 463 | { |
c402c110 | 464 | ecard_t *ec = irq_data_get_irq_chip_data(d); |
1da177e4 LT |
465 | |
466 | if (ec) { | |
467 | if (!ec->ops) | |
468 | ec->ops = &ecard_default_ops; | |
469 | ||
470 | if (ec->ops && ec->ops->irqdisable) | |
4a87bac4 | 471 | ec->ops->irqdisable(ec, d->irq); |
1da177e4 LT |
472 | } |
473 | } | |
474 | ||
38c677cb | 475 | static struct irq_chip ecard_chip = { |
4a87bac4 LB |
476 | .name = "ECARD", |
477 | .irq_ack = ecard_irq_mask, | |
478 | .irq_mask = ecard_irq_mask, | |
479 | .irq_unmask = ecard_irq_unmask, | |
1da177e4 LT |
480 | }; |
481 | ||
482 | void ecard_enablefiq(unsigned int fiqnr) | |
483 | { | |
484 | ecard_t *ec = slot_to_ecard(fiqnr); | |
485 | ||
486 | if (ec) { | |
487 | if (!ec->ops) | |
488 | ec->ops = &ecard_default_ops; | |
489 | ||
490 | if (ec->claimed && ec->ops->fiqenable) | |
491 | ec->ops->fiqenable(ec, fiqnr); | |
492 | else | |
493 | printk(KERN_ERR "ecard: rejecting request to " | |
494 | "enable FIQs for %d\n", fiqnr); | |
495 | } | |
496 | } | |
497 | ||
498 | void ecard_disablefiq(unsigned int fiqnr) | |
499 | { | |
500 | ecard_t *ec = slot_to_ecard(fiqnr); | |
501 | ||
502 | if (ec) { | |
503 | if (!ec->ops) | |
504 | ec->ops = &ecard_default_ops; | |
505 | ||
506 | if (ec->ops->fiqdisable) | |
507 | ec->ops->fiqdisable(ec, fiqnr); | |
508 | } | |
509 | } | |
510 | ||
511 | static void ecard_dump_irq_state(void) | |
512 | { | |
513 | ecard_t *ec; | |
514 | ||
515 | printk("Expansion card IRQ state:\n"); | |
516 | ||
517 | for (ec = cards; ec; ec = ec->next) { | |
518 | if (ec->slot_no == 8) | |
519 | continue; | |
520 | ||
521 | printk(" %d: %sclaimed, ", | |
522 | ec->slot_no, ec->claimed ? "" : "not "); | |
523 | ||
524 | if (ec->ops && ec->ops->irqpending && | |
525 | ec->ops != &ecard_default_ops) | |
526 | printk("irq %spending\n", | |
527 | ec->ops->irqpending(ec) ? "" : "not "); | |
528 | else | |
529 | printk("irqaddr %p, mask = %02X, status = %02X\n", | |
530 | ec->irqaddr, ec->irqmask, readb(ec->irqaddr)); | |
531 | } | |
532 | } | |
533 | ||
10dd5ce2 | 534 | static void ecard_check_lockup(struct irq_desc *desc) |
1da177e4 LT |
535 | { |
536 | static unsigned long last; | |
537 | static int lockup; | |
538 | ||
539 | /* | |
540 | * If the timer interrupt has not run since the last million | |
541 | * unrecognised expansion card interrupts, then there is | |
542 | * something seriously wrong. Disable the expansion card | |
543 | * interrupts so at least we can continue. | |
544 | * | |
545 | * Maybe we ought to start a timer to re-enable them some time | |
546 | * later? | |
547 | */ | |
548 | if (last == jiffies) { | |
549 | lockup += 1; | |
550 | if (lockup > 1000000) { | |
551 | printk(KERN_ERR "\nInterrupt lockup detected - " | |
552 | "disabling all expansion card interrupts\n"); | |
553 | ||
4a87bac4 | 554 | desc->irq_data.chip->irq_mask(&desc->irq_data); |
1da177e4 LT |
555 | ecard_dump_irq_state(); |
556 | } | |
557 | } else | |
558 | lockup = 0; | |
559 | ||
560 | /* | |
561 | * If we did not recognise the source of this interrupt, | |
562 | * warn the user, but don't flood the user with these messages. | |
563 | */ | |
564 | if (!last || time_after(jiffies, last + 5*HZ)) { | |
565 | last = jiffies; | |
566 | printk(KERN_WARNING "Unrecognised interrupt from backplane\n"); | |
567 | ecard_dump_irq_state(); | |
568 | } | |
569 | } | |
570 | ||
571 | static void | |
10dd5ce2 | 572 | ecard_irq_handler(unsigned int irq, struct irq_desc *desc) |
1da177e4 LT |
573 | { |
574 | ecard_t *ec; | |
575 | int called = 0; | |
576 | ||
4a87bac4 | 577 | desc->irq_data.chip->irq_mask(&desc->irq_data); |
1da177e4 LT |
578 | for (ec = cards; ec; ec = ec->next) { |
579 | int pending; | |
580 | ||
581 | if (!ec->claimed || ec->irq == NO_IRQ || ec->slot_no == 8) | |
582 | continue; | |
583 | ||
584 | if (ec->ops && ec->ops->irqpending) | |
585 | pending = ec->ops->irqpending(ec); | |
586 | else | |
587 | pending = ecard_default_ops.irqpending(ec); | |
588 | ||
589 | if (pending) { | |
d8aa0251 | 590 | generic_handle_irq(ec->irq); |
1da177e4 LT |
591 | called ++; |
592 | } | |
593 | } | |
4a87bac4 | 594 | desc->irq_data.chip->irq_unmask(&desc->irq_data); |
1da177e4 LT |
595 | |
596 | if (called == 0) | |
597 | ecard_check_lockup(desc); | |
598 | } | |
599 | ||
600 | #ifdef HAS_EXPMASK | |
601 | static unsigned char priority_masks[] = | |
602 | { | |
603 | 0xf0, 0xf1, 0xf3, 0xf7, 0xff, 0xff, 0xff, 0xff | |
604 | }; | |
605 | ||
606 | static unsigned char first_set[] = | |
607 | { | |
608 | 0x00, 0x00, 0x01, 0x00, 0x02, 0x00, 0x01, 0x00, | |
609 | 0x03, 0x00, 0x01, 0x00, 0x02, 0x00, 0x01, 0x00 | |
610 | }; | |
611 | ||
612 | static void | |
10dd5ce2 | 613 | ecard_irqexp_handler(unsigned int irq, struct irq_desc *desc) |
1da177e4 LT |
614 | { |
615 | const unsigned int statusmask = 15; | |
616 | unsigned int status; | |
617 | ||
618 | status = __raw_readb(EXPMASK_STATUS) & statusmask; | |
619 | if (status) { | |
620 | unsigned int slot = first_set[status]; | |
621 | ecard_t *ec = slot_to_ecard(slot); | |
622 | ||
623 | if (ec->claimed) { | |
1da177e4 LT |
624 | /* |
625 | * this ugly code is so that we can operate a | |
626 | * prioritorising system: | |
627 | * | |
628 | * Card 0 highest priority | |
629 | * Card 1 | |
630 | * Card 2 | |
631 | * Card 3 lowest priority | |
632 | * | |
633 | * Serial cards should go in 0/1, ethernet/scsi in 2/3 | |
634 | * otherwise you will lose serial data at high speeds! | |
635 | */ | |
d8aa0251 | 636 | generic_handle_irq(ec->irq); |
1da177e4 LT |
637 | } else { |
638 | printk(KERN_WARNING "card%d: interrupt from unclaimed " | |
639 | "card???\n", slot); | |
640 | have_expmask &= ~(1 << slot); | |
641 | __raw_writeb(have_expmask, EXPMASK_ENABLE); | |
642 | } | |
643 | } else | |
644 | printk(KERN_WARNING "Wild interrupt from backplane (masks)\n"); | |
645 | } | |
646 | ||
647 | static int __init ecard_probeirqhw(void) | |
648 | { | |
649 | ecard_t *ec; | |
650 | int found; | |
651 | ||
652 | __raw_writeb(0x00, EXPMASK_ENABLE); | |
653 | __raw_writeb(0xff, EXPMASK_STATUS); | |
654 | found = (__raw_readb(EXPMASK_STATUS) & 15) == 0; | |
655 | __raw_writeb(0xff, EXPMASK_ENABLE); | |
656 | ||
657 | if (found) { | |
658 | printk(KERN_DEBUG "Expansion card interrupt " | |
659 | "management hardware found\n"); | |
660 | ||
661 | /* for each card present, set a bit to '1' */ | |
662 | have_expmask = 0x80000000; | |
663 | ||
664 | for (ec = cards; ec; ec = ec->next) | |
665 | have_expmask |= 1 << ec->slot_no; | |
666 | ||
667 | __raw_writeb(have_expmask, EXPMASK_ENABLE); | |
668 | } | |
669 | ||
670 | return found; | |
671 | } | |
672 | #else | |
673 | #define ecard_irqexp_handler NULL | |
674 | #define ecard_probeirqhw() (0) | |
675 | #endif | |
676 | ||
1ace7566 | 677 | static void __iomem *__ecard_address(ecard_t *ec, card_type_t type, card_speed_t speed) |
1da177e4 | 678 | { |
06cf0b54 | 679 | void __iomem *address = NULL; |
1da177e4 LT |
680 | int slot = ec->slot_no; |
681 | ||
682 | if (ec->slot_no == 8) | |
06cf0b54 | 683 | return ECARD_MEMC8_BASE; |
1da177e4 LT |
684 | |
685 | ectcr &= ~(1 << slot); | |
686 | ||
687 | switch (type) { | |
688 | case ECARD_MEMC: | |
689 | if (slot < 4) | |
06cf0b54 | 690 | address = ECARD_MEMC_BASE + (slot << 14); |
1da177e4 LT |
691 | break; |
692 | ||
693 | case ECARD_IOC: | |
694 | if (slot < 4) | |
06cf0b54 | 695 | address = ECARD_IOC_BASE + (slot << 14); |
1da177e4 | 696 | else |
06cf0b54 | 697 | address = ECARD_IOC4_BASE + ((slot - 4) << 14); |
1da177e4 | 698 | if (address) |
06cf0b54 | 699 | address += speed << 19; |
1da177e4 LT |
700 | break; |
701 | ||
1da177e4 | 702 | case ECARD_EASI: |
06cf0b54 | 703 | address = ECARD_EASI_BASE + (slot << 24); |
1da177e4 LT |
704 | if (speed == ECARD_FAST) |
705 | ectcr |= 1 << slot; | |
706 | break; | |
06cf0b54 | 707 | |
1da177e4 LT |
708 | default: |
709 | break; | |
710 | } | |
711 | ||
712 | #ifdef IOMD_ECTCR | |
713 | iomd_writeb(ectcr, IOMD_ECTCR); | |
714 | #endif | |
06cf0b54 | 715 | return address; |
1da177e4 LT |
716 | } |
717 | ||
9b001212 | 718 | static int ecard_prints(struct seq_file *m, ecard_t *ec) |
1da177e4 | 719 | { |
9b001212 | 720 | seq_printf(m, " %d: %s ", ec->slot_no, ec->easi ? "EASI" : " "); |
1da177e4 LT |
721 | |
722 | if (ec->cid.id == 0) { | |
723 | struct in_chunk_dir incd; | |
724 | ||
9b001212 | 725 | seq_printf(m, "[%04X:%04X] ", |
1da177e4 LT |
726 | ec->cid.manufacturer, ec->cid.product); |
727 | ||
728 | if (!ec->card_desc && ec->cid.cd && | |
729 | ecard_readchunk(&incd, ec, 0xf5, 0)) { | |
730 | ec->card_desc = kmalloc(strlen(incd.d.string)+1, GFP_KERNEL); | |
731 | ||
732 | if (ec->card_desc) | |
733 | strcpy((char *)ec->card_desc, incd.d.string); | |
734 | } | |
735 | ||
9b001212 | 736 | seq_printf(m, "%s\n", ec->card_desc ? ec->card_desc : "*unknown*"); |
1da177e4 | 737 | } else |
9b001212 | 738 | seq_printf(m, "Simple card %d\n", ec->cid.id); |
1da177e4 | 739 | |
9b001212 | 740 | return 0; |
1da177e4 LT |
741 | } |
742 | ||
9b001212 | 743 | static int ecard_devices_proc_show(struct seq_file *m, void *v) |
1da177e4 LT |
744 | { |
745 | ecard_t *ec = cards; | |
9b001212 AD |
746 | |
747 | while (ec) { | |
748 | ecard_prints(m, ec); | |
1da177e4 LT |
749 | ec = ec->next; |
750 | } | |
9b001212 | 751 | return 0; |
1da177e4 LT |
752 | } |
753 | ||
9b001212 AD |
754 | static int ecard_devices_proc_open(struct inode *inode, struct file *file) |
755 | { | |
756 | return single_open(file, ecard_devices_proc_show, NULL); | |
757 | } | |
758 | ||
759 | static const struct file_operations bus_ecard_proc_fops = { | |
760 | .owner = THIS_MODULE, | |
761 | .open = ecard_devices_proc_open, | |
762 | .read = seq_read, | |
763 | .llseek = seq_lseek, | |
764 | .release = single_release, | |
765 | }; | |
766 | ||
1da177e4 LT |
767 | static struct proc_dir_entry *proc_bus_ecard_dir = NULL; |
768 | ||
769 | static void ecard_proc_init(void) | |
770 | { | |
9c37066d | 771 | proc_bus_ecard_dir = proc_mkdir("bus/ecard", NULL); |
9b001212 | 772 | proc_create("devices", 0, proc_bus_ecard_dir, &bus_ecard_proc_fops); |
1da177e4 LT |
773 | } |
774 | ||
775 | #define ec_set_resource(ec,nr,st,sz) \ | |
776 | do { \ | |
3f978704 | 777 | (ec)->resource[nr].name = dev_name(&ec->dev); \ |
1da177e4 LT |
778 | (ec)->resource[nr].start = st; \ |
779 | (ec)->resource[nr].end = (st) + (sz) - 1; \ | |
780 | (ec)->resource[nr].flags = IORESOURCE_MEM; \ | |
781 | } while (0) | |
782 | ||
783 | static void __init ecard_free_card(struct expansion_card *ec) | |
784 | { | |
785 | int i; | |
786 | ||
787 | for (i = 0; i < ECARD_NUM_RESOURCES; i++) | |
788 | if (ec->resource[i].flags) | |
789 | release_resource(&ec->resource[i]); | |
790 | ||
791 | kfree(ec); | |
792 | } | |
793 | ||
794 | static struct expansion_card *__init ecard_alloc_card(int type, int slot) | |
795 | { | |
796 | struct expansion_card *ec; | |
797 | unsigned long base; | |
798 | int i; | |
799 | ||
d2a02b93 | 800 | ec = kzalloc(sizeof(ecard_t), GFP_KERNEL); |
1da177e4 LT |
801 | if (!ec) { |
802 | ec = ERR_PTR(-ENOMEM); | |
803 | goto nomem; | |
804 | } | |
805 | ||
1da177e4 | 806 | ec->slot_no = slot; |
5559bca8 | 807 | ec->easi = type == ECARD_EASI; |
1da177e4 LT |
808 | ec->irq = NO_IRQ; |
809 | ec->fiq = NO_IRQ; | |
810 | ec->dma = NO_DMA; | |
811 | ec->ops = &ecard_default_ops; | |
812 | ||
1d559e29 | 813 | dev_set_name(&ec->dev, "ecard%d", slot); |
1da177e4 LT |
814 | ec->dev.parent = NULL; |
815 | ec->dev.bus = &ecard_bus_type; | |
816 | ec->dev.dma_mask = &ec->dma_mask; | |
817 | ec->dma_mask = (u64)0xffffffff; | |
69f4f331 | 818 | ec->dev.coherent_dma_mask = ec->dma_mask; |
1da177e4 LT |
819 | |
820 | if (slot < 4) { | |
821 | ec_set_resource(ec, ECARD_RES_MEMC, | |
822 | PODSLOT_MEMC_BASE + (slot << 14), | |
823 | PODSLOT_MEMC_SIZE); | |
824 | base = PODSLOT_IOC0_BASE + (slot << 14); | |
825 | } else | |
826 | base = PODSLOT_IOC4_BASE + ((slot - 4) << 14); | |
827 | ||
828 | #ifdef CONFIG_ARCH_RPC | |
829 | if (slot < 8) { | |
830 | ec_set_resource(ec, ECARD_RES_EASI, | |
831 | PODSLOT_EASI_BASE + (slot << 24), | |
832 | PODSLOT_EASI_SIZE); | |
833 | } | |
834 | ||
835 | if (slot == 8) { | |
836 | ec_set_resource(ec, ECARD_RES_MEMC, NETSLOT_BASE, NETSLOT_SIZE); | |
837 | } else | |
838 | #endif | |
839 | ||
840 | for (i = 0; i <= ECARD_RES_IOCSYNC - ECARD_RES_IOCSLOW; i++) | |
841 | ec_set_resource(ec, i + ECARD_RES_IOCSLOW, | |
842 | base + (i << 19), PODSLOT_IOC_SIZE); | |
843 | ||
844 | for (i = 0; i < ECARD_NUM_RESOURCES; i++) { | |
845 | if (ec->resource[i].flags && | |
846 | request_resource(&iomem_resource, &ec->resource[i])) { | |
fc3a8828 | 847 | dev_err(&ec->dev, "resource(s) not available\n"); |
1da177e4 LT |
848 | ec->resource[i].end -= ec->resource[i].start; |
849 | ec->resource[i].start = 0; | |
850 | ec->resource[i].flags = 0; | |
851 | } | |
852 | } | |
853 | ||
854 | nomem: | |
855 | return ec; | |
856 | } | |
857 | ||
ff381d22 | 858 | static ssize_t ecard_show_irq(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
859 | { |
860 | struct expansion_card *ec = ECARD_DEV(dev); | |
861 | return sprintf(buf, "%u\n", ec->irq); | |
862 | } | |
863 | ||
ff381d22 | 864 | static ssize_t ecard_show_dma(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
865 | { |
866 | struct expansion_card *ec = ECARD_DEV(dev); | |
867 | return sprintf(buf, "%u\n", ec->dma); | |
868 | } | |
869 | ||
ff381d22 | 870 | static ssize_t ecard_show_resources(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
871 | { |
872 | struct expansion_card *ec = ECARD_DEV(dev); | |
873 | char *str = buf; | |
874 | int i; | |
875 | ||
876 | for (i = 0; i < ECARD_NUM_RESOURCES; i++) | |
c9e4143c | 877 | str += sprintf(str, "%08x %08x %08lx\n", |
1da177e4 LT |
878 | ec->resource[i].start, |
879 | ec->resource[i].end, | |
880 | ec->resource[i].flags); | |
881 | ||
882 | return str - buf; | |
883 | } | |
884 | ||
ff381d22 | 885 | static ssize_t ecard_show_vendor(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
886 | { |
887 | struct expansion_card *ec = ECARD_DEV(dev); | |
888 | return sprintf(buf, "%u\n", ec->cid.manufacturer); | |
889 | } | |
890 | ||
ff381d22 | 891 | static ssize_t ecard_show_device(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
892 | { |
893 | struct expansion_card *ec = ECARD_DEV(dev); | |
894 | return sprintf(buf, "%u\n", ec->cid.product); | |
895 | } | |
896 | ||
ff381d22 | 897 | static ssize_t ecard_show_type(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
898 | { |
899 | struct expansion_card *ec = ECARD_DEV(dev); | |
5559bca8 | 900 | return sprintf(buf, "%s\n", ec->easi ? "EASI" : "IOC"); |
1da177e4 LT |
901 | } |
902 | ||
903 | static struct device_attribute ecard_dev_attrs[] = { | |
904 | __ATTR(device, S_IRUGO, ecard_show_device, NULL), | |
905 | __ATTR(dma, S_IRUGO, ecard_show_dma, NULL), | |
906 | __ATTR(irq, S_IRUGO, ecard_show_irq, NULL), | |
907 | __ATTR(resource, S_IRUGO, ecard_show_resources, NULL), | |
908 | __ATTR(type, S_IRUGO, ecard_show_type, NULL), | |
909 | __ATTR(vendor, S_IRUGO, ecard_show_vendor, NULL), | |
910 | __ATTR_NULL, | |
911 | }; | |
912 | ||
913 | ||
914 | int ecard_request_resources(struct expansion_card *ec) | |
915 | { | |
916 | int i, err = 0; | |
917 | ||
918 | for (i = 0; i < ECARD_NUM_RESOURCES; i++) { | |
919 | if (ecard_resource_end(ec, i) && | |
920 | !request_mem_region(ecard_resource_start(ec, i), | |
921 | ecard_resource_len(ec, i), | |
922 | ec->dev.driver->name)) { | |
923 | err = -EBUSY; | |
924 | break; | |
925 | } | |
926 | } | |
927 | ||
928 | if (err) { | |
929 | while (i--) | |
930 | if (ecard_resource_end(ec, i)) | |
931 | release_mem_region(ecard_resource_start(ec, i), | |
932 | ecard_resource_len(ec, i)); | |
933 | } | |
934 | return err; | |
935 | } | |
936 | EXPORT_SYMBOL(ecard_request_resources); | |
937 | ||
938 | void ecard_release_resources(struct expansion_card *ec) | |
939 | { | |
940 | int i; | |
941 | ||
942 | for (i = 0; i < ECARD_NUM_RESOURCES; i++) | |
943 | if (ecard_resource_end(ec, i)) | |
944 | release_mem_region(ecard_resource_start(ec, i), | |
945 | ecard_resource_len(ec, i)); | |
946 | } | |
947 | EXPORT_SYMBOL(ecard_release_resources); | |
948 | ||
c7b87f3d RK |
949 | void ecard_setirq(struct expansion_card *ec, const struct expansion_card_ops *ops, void *irq_data) |
950 | { | |
951 | ec->irq_data = irq_data; | |
952 | barrier(); | |
953 | ec->ops = ops; | |
954 | } | |
955 | EXPORT_SYMBOL(ecard_setirq); | |
956 | ||
10bdaaa0 RK |
957 | void __iomem *ecardm_iomap(struct expansion_card *ec, unsigned int res, |
958 | unsigned long offset, unsigned long maxsize) | |
959 | { | |
960 | unsigned long start = ecard_resource_start(ec, res); | |
961 | unsigned long end = ecard_resource_end(ec, res); | |
962 | ||
963 | if (offset > (end - start)) | |
964 | return NULL; | |
965 | ||
966 | start += offset; | |
967 | if (maxsize && end - start > maxsize) | |
968 | end = start + maxsize; | |
969 | ||
970 | return devm_ioremap(&ec->dev, start, end - start); | |
971 | } | |
972 | EXPORT_SYMBOL(ecardm_iomap); | |
973 | ||
1da177e4 LT |
974 | /* |
975 | * Probe for an expansion card. | |
976 | * | |
977 | * If bit 1 of the first byte of the card is set, then the | |
978 | * card does not exist. | |
979 | */ | |
980 | static int __init | |
981 | ecard_probe(int slot, card_type_t type) | |
982 | { | |
983 | ecard_t **ecp; | |
984 | ecard_t *ec; | |
985 | struct ex_ecid cid; | |
1ace7566 | 986 | void __iomem *addr; |
1da177e4 LT |
987 | int i, rc; |
988 | ||
989 | ec = ecard_alloc_card(type, slot); | |
990 | if (IS_ERR(ec)) { | |
991 | rc = PTR_ERR(ec); | |
992 | goto nomem; | |
993 | } | |
994 | ||
995 | rc = -ENODEV; | |
1ace7566 | 996 | if ((addr = __ecard_address(ec, type, ECARD_SYNC)) == NULL) |
1da177e4 LT |
997 | goto nodev; |
998 | ||
999 | cid.r_zero = 1; | |
1000 | ecard_readbytes(&cid, ec, 0, 16, 0); | |
1001 | if (cid.r_zero) | |
1002 | goto nodev; | |
1003 | ||
1004 | ec->cid.id = cid.r_id; | |
1005 | ec->cid.cd = cid.r_cd; | |
1006 | ec->cid.is = cid.r_is; | |
1007 | ec->cid.w = cid.r_w; | |
1008 | ec->cid.manufacturer = ecard_getu16(cid.r_manu); | |
1009 | ec->cid.product = ecard_getu16(cid.r_prod); | |
1010 | ec->cid.country = cid.r_country; | |
1011 | ec->cid.irqmask = cid.r_irqmask; | |
1012 | ec->cid.irqoff = ecard_gets24(cid.r_irqoff); | |
1013 | ec->cid.fiqmask = cid.r_fiqmask; | |
1014 | ec->cid.fiqoff = ecard_gets24(cid.r_fiqoff); | |
1015 | ec->fiqaddr = | |
1ace7566 | 1016 | ec->irqaddr = addr; |
1da177e4 LT |
1017 | |
1018 | if (ec->cid.is) { | |
1019 | ec->irqmask = ec->cid.irqmask; | |
1020 | ec->irqaddr += ec->cid.irqoff; | |
1021 | ec->fiqmask = ec->cid.fiqmask; | |
1022 | ec->fiqaddr += ec->cid.fiqoff; | |
1023 | } else { | |
1024 | ec->irqmask = 1; | |
1025 | ec->fiqmask = 4; | |
1026 | } | |
1027 | ||
eeea82ff | 1028 | for (i = 0; i < ARRAY_SIZE(blacklist); i++) |
1da177e4 LT |
1029 | if (blacklist[i].manufacturer == ec->cid.manufacturer && |
1030 | blacklist[i].product == ec->cid.product) { | |
1031 | ec->card_desc = blacklist[i].type; | |
1032 | break; | |
1033 | } | |
1034 | ||
1035 | /* | |
1036 | * hook the interrupt handlers | |
1037 | */ | |
1038 | if (slot < 8) { | |
1039 | ec->irq = 32 + slot; | |
f38c02f3 TG |
1040 | irq_set_chip_and_handler(ec->irq, &ecard_chip, |
1041 | handle_level_irq); | |
c402c110 | 1042 | irq_set_chip_data(ec->irq, ec); |
1da177e4 LT |
1043 | set_irq_flags(ec->irq, IRQF_VALID); |
1044 | } | |
1045 | ||
1da177e4 LT |
1046 | if (slot == 8) |
1047 | ec->irq = 11; | |
1da177e4 LT |
1048 | #ifdef CONFIG_ARCH_RPC |
1049 | /* On RiscPC, only first two slots have DMA capability */ | |
1050 | if (slot < 2) | |
1051 | ec->dma = 2 + slot; | |
1052 | #endif | |
1053 | ||
1054 | for (ecp = &cards; *ecp; ecp = &(*ecp)->next); | |
1055 | ||
1056 | *ecp = ec; | |
1057 | slot_to_expcard[slot] = ec; | |
1058 | ||
1059 | device_register(&ec->dev); | |
1060 | ||
1061 | return 0; | |
1062 | ||
1063 | nodev: | |
1064 | ecard_free_card(ec); | |
1065 | nomem: | |
1066 | return rc; | |
1067 | } | |
1068 | ||
1069 | /* | |
1070 | * Initialise the expansion card system. | |
1071 | * Locate all hardware - interrupt management and | |
1072 | * actual cards. | |
1073 | */ | |
1074 | static int __init ecard_init(void) | |
1075 | { | |
134c99e9 EB |
1076 | struct task_struct *task; |
1077 | int slot, irqhw; | |
1da177e4 | 1078 | |
134c99e9 EB |
1079 | task = kthread_run(ecard_task, NULL, "kecardd"); |
1080 | if (IS_ERR(task)) { | |
e6aeb47d | 1081 | printk(KERN_ERR "Ecard: unable to create kernel thread: %ld\n", |
134c99e9 EB |
1082 | PTR_ERR(task)); |
1083 | return PTR_ERR(task); | |
1da177e4 LT |
1084 | } |
1085 | ||
1086 | printk("Probing expansion cards\n"); | |
1087 | ||
1088 | for (slot = 0; slot < 8; slot ++) { | |
1089 | if (ecard_probe(slot, ECARD_EASI) == -ENODEV) | |
1090 | ecard_probe(slot, ECARD_IOC); | |
1091 | } | |
1092 | ||
1da177e4 | 1093 | ecard_probe(8, ECARD_IOC); |
1da177e4 LT |
1094 | |
1095 | irqhw = ecard_probeirqhw(); | |
1096 | ||
6845664a | 1097 | irq_set_chained_handler(IRQ_EXPANSIONCARD, |
1da177e4 LT |
1098 | irqhw ? ecard_irqexp_handler : ecard_irq_handler); |
1099 | ||
1100 | ecard_proc_init(); | |
1101 | ||
1102 | return 0; | |
1103 | } | |
1104 | ||
1105 | subsys_initcall(ecard_init); | |
1106 | ||
1107 | /* | |
1108 | * ECARD "bus" | |
1109 | */ | |
1110 | static const struct ecard_id * | |
1111 | ecard_match_device(const struct ecard_id *ids, struct expansion_card *ec) | |
1112 | { | |
1113 | int i; | |
1114 | ||
1115 | for (i = 0; ids[i].manufacturer != 65535; i++) | |
1116 | if (ec->cid.manufacturer == ids[i].manufacturer && | |
1117 | ec->cid.product == ids[i].product) | |
1118 | return ids + i; | |
1119 | ||
1120 | return NULL; | |
1121 | } | |
1122 | ||
1123 | static int ecard_drv_probe(struct device *dev) | |
1124 | { | |
1125 | struct expansion_card *ec = ECARD_DEV(dev); | |
1126 | struct ecard_driver *drv = ECARD_DRV(dev->driver); | |
1127 | const struct ecard_id *id; | |
1128 | int ret; | |
1129 | ||
1130 | id = ecard_match_device(drv->id_table, ec); | |
1131 | ||
9ecba1f2 | 1132 | ec->claimed = 1; |
1da177e4 LT |
1133 | ret = drv->probe(ec, id); |
1134 | if (ret) | |
9ecba1f2 | 1135 | ec->claimed = 0; |
1da177e4 LT |
1136 | return ret; |
1137 | } | |
1138 | ||
1139 | static int ecard_drv_remove(struct device *dev) | |
1140 | { | |
1141 | struct expansion_card *ec = ECARD_DEV(dev); | |
1142 | struct ecard_driver *drv = ECARD_DRV(dev->driver); | |
1143 | ||
1144 | drv->remove(ec); | |
9ecba1f2 | 1145 | ec->claimed = 0; |
1da177e4 | 1146 | |
c7b87f3d RK |
1147 | /* |
1148 | * Restore the default operations. We ensure that the | |
1149 | * ops are set before we change the data. | |
1150 | */ | |
1151 | ec->ops = &ecard_default_ops; | |
1152 | barrier(); | |
1153 | ec->irq_data = NULL; | |
1154 | ||
1da177e4 LT |
1155 | return 0; |
1156 | } | |
1157 | ||
1158 | /* | |
1159 | * Before rebooting, we must make sure that the expansion card is in a | |
1160 | * sensible state, so it can be re-detected. This means that the first | |
1161 | * page of the ROM must be visible. We call the expansion cards reset | |
1162 | * handler, if any. | |
1163 | */ | |
1164 | static void ecard_drv_shutdown(struct device *dev) | |
1165 | { | |
1166 | struct expansion_card *ec = ECARD_DEV(dev); | |
1167 | struct ecard_driver *drv = ECARD_DRV(dev->driver); | |
1168 | struct ecard_request req; | |
1169 | ||
e08b7541 RK |
1170 | if (dev->driver) { |
1171 | if (drv->shutdown) | |
1172 | drv->shutdown(ec); | |
9ecba1f2 | 1173 | ec->claimed = 0; |
e08b7541 | 1174 | } |
1da177e4 LT |
1175 | |
1176 | /* | |
1177 | * If this card has a loader, call the reset handler. | |
1178 | */ | |
1179 | if (ec->loader) { | |
1180 | req.fn = ecard_task_reset; | |
1181 | req.ec = ec; | |
1182 | ecard_call(&req); | |
1183 | } | |
1184 | } | |
1185 | ||
1186 | int ecard_register_driver(struct ecard_driver *drv) | |
1187 | { | |
1188 | drv->drv.bus = &ecard_bus_type; | |
1da177e4 LT |
1189 | |
1190 | return driver_register(&drv->drv); | |
1191 | } | |
1192 | ||
1193 | void ecard_remove_driver(struct ecard_driver *drv) | |
1194 | { | |
1195 | driver_unregister(&drv->drv); | |
1196 | } | |
1197 | ||
1198 | static int ecard_match(struct device *_dev, struct device_driver *_drv) | |
1199 | { | |
1200 | struct expansion_card *ec = ECARD_DEV(_dev); | |
1201 | struct ecard_driver *drv = ECARD_DRV(_drv); | |
1202 | int ret; | |
1203 | ||
1204 | if (drv->id_table) { | |
1205 | ret = ecard_match_device(drv->id_table, ec) != NULL; | |
1206 | } else { | |
1207 | ret = ec->cid.id == drv->id; | |
1208 | } | |
1209 | ||
1210 | return ret; | |
1211 | } | |
1212 | ||
1213 | struct bus_type ecard_bus_type = { | |
1214 | .name = "ecard", | |
1215 | .dev_attrs = ecard_dev_attrs, | |
1216 | .match = ecard_match, | |
e08b7541 RK |
1217 | .probe = ecard_drv_probe, |
1218 | .remove = ecard_drv_remove, | |
1219 | .shutdown = ecard_drv_shutdown, | |
1da177e4 LT |
1220 | }; |
1221 | ||
1222 | static int ecard_bus_init(void) | |
1223 | { | |
1224 | return bus_register(&ecard_bus_type); | |
1225 | } | |
1226 | ||
1227 | postcore_initcall(ecard_bus_init); | |
1228 | ||
1229 | EXPORT_SYMBOL(ecard_readchunk); | |
1da177e4 LT |
1230 | EXPORT_SYMBOL(ecard_register_driver); |
1231 | EXPORT_SYMBOL(ecard_remove_driver); | |
1232 | EXPORT_SYMBOL(ecard_bus_type); |