Root/
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 | |
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> |
40 | #include <linux/seq_file.h> |
41 | #include <linux/device.h> |
42 | #include <linux/init.h> |
43 | #include <linux/mutex.h> |
44 | #include <linux/kthread.h> |
45 | #include <linux/io.h> |
46 | |
47 | #include <asm/dma.h> |
48 | #include <asm/ecard.h> |
49 | #include <mach/hardware.h> |
50 | #include <asm/irq.h> |
51 | #include <asm/mmu_context.h> |
52 | #include <asm/mach/irq.h> |
53 | #include <asm/tlbflush.h> |
54 | |
55 | #include "ecard.h" |
56 | |
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] |
130 | : ec->easi |
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 { |
185 | unsigned long base = (ec->easi |
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; |
213 | static DEFINE_MUTEX(ecard_mutex); |
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 | |
240 | src_pgd = pgd_offset(mm, EASI_BASE); |
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 | { |
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 | { |
300 | DECLARE_COMPLETION_ONSTACK(completion); |
301 | |
302 | req->complete = &completion; |
303 | |
304 | mutex_lock(&ecard_mutex); |
305 | ecard_req = req; |
306 | wake_up(&ecard_wait); |
307 | |
308 | /* |
309 | * Now wait for kecardd to run. |
310 | */ |
311 | wait_for_completion(&completion); |
312 | mutex_unlock(&ecard_mutex); |
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) { |
358 | ec->loader = kmalloc(c_len(&excd), |
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 | */ |
446 | static void ecard_irq_unmask(unsigned int irqnr) |
447 | { |
448 | ecard_t *ec = slot_to_ecard(irqnr - 32); |
449 | |
450 | if (ec) { |
451 | if (!ec->ops) |
452 | ec->ops = &ecard_default_ops; |
453 | |
454 | if (ec->claimed && ec->ops->irqenable) |
455 | ec->ops->irqenable(ec, irqnr); |
456 | else |
457 | printk(KERN_ERR "ecard: rejecting request to " |
458 | "enable IRQs for %d\n", irqnr); |
459 | } |
460 | } |
461 | |
462 | static void ecard_irq_mask(unsigned int irqnr) |
463 | { |
464 | ecard_t *ec = slot_to_ecard(irqnr - 32); |
465 | |
466 | if (ec) { |
467 | if (!ec->ops) |
468 | ec->ops = &ecard_default_ops; |
469 | |
470 | if (ec->ops && ec->ops->irqdisable) |
471 | ec->ops->irqdisable(ec, irqnr); |
472 | } |
473 | } |
474 | |
475 | static struct irq_chip ecard_chip = { |
476 | .name = "ECARD", |
477 | .ack = ecard_irq_mask, |
478 | .mask = ecard_irq_mask, |
479 | .unmask = ecard_irq_unmask, |
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 | |
534 | static void ecard_check_lockup(struct irq_desc *desc) |
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 | |
554 | desc->chip->mask(IRQ_EXPANSIONCARD); |
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 |
572 | ecard_irq_handler(unsigned int irq, struct irq_desc *desc) |
573 | { |
574 | ecard_t *ec; |
575 | int called = 0; |
576 | |
577 | desc->chip->mask(irq); |
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) { |
590 | generic_handle_irq(ec->irq); |
591 | called ++; |
592 | } |
593 | } |
594 | desc->chip->unmask(irq); |
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 |
613 | ecard_irqexp_handler(unsigned int irq, struct irq_desc *desc) |
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) { |
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 | */ |
636 | generic_handle_irq(ec->irq); |
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 | |
677 | #ifndef IO_EC_MEMC8_BASE |
678 | #define IO_EC_MEMC8_BASE 0 |
679 | #endif |
680 | |
681 | static unsigned int __ecard_address(ecard_t *ec, card_type_t type, card_speed_t speed) |
682 | { |
683 | unsigned long address = 0; |
684 | int slot = ec->slot_no; |
685 | |
686 | if (ec->slot_no == 8) |
687 | return IO_EC_MEMC8_BASE; |
688 | |
689 | ectcr &= ~(1 << slot); |
690 | |
691 | switch (type) { |
692 | case ECARD_MEMC: |
693 | if (slot < 4) |
694 | address = IO_EC_MEMC_BASE + (slot << 12); |
695 | break; |
696 | |
697 | case ECARD_IOC: |
698 | if (slot < 4) |
699 | address = IO_EC_IOC_BASE + (slot << 12); |
700 | #ifdef IO_EC_IOC4_BASE |
701 | else |
702 | address = IO_EC_IOC4_BASE + ((slot - 4) << 12); |
703 | #endif |
704 | if (address) |
705 | address += speed << 17; |
706 | break; |
707 | |
708 | #ifdef IO_EC_EASI_BASE |
709 | case ECARD_EASI: |
710 | address = IO_EC_EASI_BASE + (slot << 22); |
711 | if (speed == ECARD_FAST) |
712 | ectcr |= 1 << slot; |
713 | break; |
714 | #endif |
715 | default: |
716 | break; |
717 | } |
718 | |
719 | #ifdef IOMD_ECTCR |
720 | iomd_writeb(ectcr, IOMD_ECTCR); |
721 | #endif |
722 | return address; |
723 | } |
724 | |
725 | static int ecard_prints(struct seq_file *m, ecard_t *ec) |
726 | { |
727 | seq_printf(m, " %d: %s ", ec->slot_no, ec->easi ? "EASI" : " "); |
728 | |
729 | if (ec->cid.id == 0) { |
730 | struct in_chunk_dir incd; |
731 | |
732 | seq_printf(m, "[%04X:%04X] ", |
733 | ec->cid.manufacturer, ec->cid.product); |
734 | |
735 | if (!ec->card_desc && ec->cid.cd && |
736 | ecard_readchunk(&incd, ec, 0xf5, 0)) { |
737 | ec->card_desc = kmalloc(strlen(incd.d.string)+1, GFP_KERNEL); |
738 | |
739 | if (ec->card_desc) |
740 | strcpy((char *)ec->card_desc, incd.d.string); |
741 | } |
742 | |
743 | seq_printf(m, "%s\n", ec->card_desc ? ec->card_desc : "*unknown*"); |
744 | } else |
745 | seq_printf(m, "Simple card %d\n", ec->cid.id); |
746 | |
747 | return 0; |
748 | } |
749 | |
750 | static int ecard_devices_proc_show(struct seq_file *m, void *v) |
751 | { |
752 | ecard_t *ec = cards; |
753 | |
754 | while (ec) { |
755 | ecard_prints(m, ec); |
756 | ec = ec->next; |
757 | } |
758 | return 0; |
759 | } |
760 | |
761 | static int ecard_devices_proc_open(struct inode *inode, struct file *file) |
762 | { |
763 | return single_open(file, ecard_devices_proc_show, NULL); |
764 | } |
765 | |
766 | static const struct file_operations bus_ecard_proc_fops = { |
767 | .owner = THIS_MODULE, |
768 | .open = ecard_devices_proc_open, |
769 | .read = seq_read, |
770 | .llseek = seq_lseek, |
771 | .release = single_release, |
772 | }; |
773 | |
774 | static struct proc_dir_entry *proc_bus_ecard_dir = NULL; |
775 | |
776 | static void ecard_proc_init(void) |
777 | { |
778 | proc_bus_ecard_dir = proc_mkdir("bus/ecard", NULL); |
779 | proc_create("devices", 0, proc_bus_ecard_dir, &bus_ecard_proc_fops); |
780 | } |
781 | |
782 | #define ec_set_resource(ec,nr,st,sz) \ |
783 | do { \ |
784 | (ec)->resource[nr].name = dev_name(&ec->dev); \ |
785 | (ec)->resource[nr].start = st; \ |
786 | (ec)->resource[nr].end = (st) + (sz) - 1; \ |
787 | (ec)->resource[nr].flags = IORESOURCE_MEM; \ |
788 | } while (0) |
789 | |
790 | static void __init ecard_free_card(struct expansion_card *ec) |
791 | { |
792 | int i; |
793 | |
794 | for (i = 0; i < ECARD_NUM_RESOURCES; i++) |
795 | if (ec->resource[i].flags) |
796 | release_resource(&ec->resource[i]); |
797 | |
798 | kfree(ec); |
799 | } |
800 | |
801 | static struct expansion_card *__init ecard_alloc_card(int type, int slot) |
802 | { |
803 | struct expansion_card *ec; |
804 | unsigned long base; |
805 | int i; |
806 | |
807 | ec = kzalloc(sizeof(ecard_t), GFP_KERNEL); |
808 | if (!ec) { |
809 | ec = ERR_PTR(-ENOMEM); |
810 | goto nomem; |
811 | } |
812 | |
813 | ec->slot_no = slot; |
814 | ec->easi = type == ECARD_EASI; |
815 | ec->irq = NO_IRQ; |
816 | ec->fiq = NO_IRQ; |
817 | ec->dma = NO_DMA; |
818 | ec->ops = &ecard_default_ops; |
819 | |
820 | dev_set_name(&ec->dev, "ecard%d", slot); |
821 | ec->dev.parent = NULL; |
822 | ec->dev.bus = &ecard_bus_type; |
823 | ec->dev.dma_mask = &ec->dma_mask; |
824 | ec->dma_mask = (u64)0xffffffff; |
825 | ec->dev.coherent_dma_mask = ec->dma_mask; |
826 | |
827 | if (slot < 4) { |
828 | ec_set_resource(ec, ECARD_RES_MEMC, |
829 | PODSLOT_MEMC_BASE + (slot << 14), |
830 | PODSLOT_MEMC_SIZE); |
831 | base = PODSLOT_IOC0_BASE + (slot << 14); |
832 | } else |
833 | base = PODSLOT_IOC4_BASE + ((slot - 4) << 14); |
834 | |
835 | #ifdef CONFIG_ARCH_RPC |
836 | if (slot < 8) { |
837 | ec_set_resource(ec, ECARD_RES_EASI, |
838 | PODSLOT_EASI_BASE + (slot << 24), |
839 | PODSLOT_EASI_SIZE); |
840 | } |
841 | |
842 | if (slot == 8) { |
843 | ec_set_resource(ec, ECARD_RES_MEMC, NETSLOT_BASE, NETSLOT_SIZE); |
844 | } else |
845 | #endif |
846 | |
847 | for (i = 0; i <= ECARD_RES_IOCSYNC - ECARD_RES_IOCSLOW; i++) |
848 | ec_set_resource(ec, i + ECARD_RES_IOCSLOW, |
849 | base + (i << 19), PODSLOT_IOC_SIZE); |
850 | |
851 | for (i = 0; i < ECARD_NUM_RESOURCES; i++) { |
852 | if (ec->resource[i].flags && |
853 | request_resource(&iomem_resource, &ec->resource[i])) { |
854 | dev_err(&ec->dev, "resource(s) not available\n"); |
855 | ec->resource[i].end -= ec->resource[i].start; |
856 | ec->resource[i].start = 0; |
857 | ec->resource[i].flags = 0; |
858 | } |
859 | } |
860 | |
861 | nomem: |
862 | return ec; |
863 | } |
864 | |
865 | static ssize_t ecard_show_irq(struct device *dev, struct device_attribute *attr, char *buf) |
866 | { |
867 | struct expansion_card *ec = ECARD_DEV(dev); |
868 | return sprintf(buf, "%u\n", ec->irq); |
869 | } |
870 | |
871 | static ssize_t ecard_show_dma(struct device *dev, struct device_attribute *attr, char *buf) |
872 | { |
873 | struct expansion_card *ec = ECARD_DEV(dev); |
874 | return sprintf(buf, "%u\n", ec->dma); |
875 | } |
876 | |
877 | static ssize_t ecard_show_resources(struct device *dev, struct device_attribute *attr, char *buf) |
878 | { |
879 | struct expansion_card *ec = ECARD_DEV(dev); |
880 | char *str = buf; |
881 | int i; |
882 | |
883 | for (i = 0; i < ECARD_NUM_RESOURCES; i++) |
884 | str += sprintf(str, "%08x %08x %08lx\n", |
885 | ec->resource[i].start, |
886 | ec->resource[i].end, |
887 | ec->resource[i].flags); |
888 | |
889 | return str - buf; |
890 | } |
891 | |
892 | static ssize_t ecard_show_vendor(struct device *dev, struct device_attribute *attr, char *buf) |
893 | { |
894 | struct expansion_card *ec = ECARD_DEV(dev); |
895 | return sprintf(buf, "%u\n", ec->cid.manufacturer); |
896 | } |
897 | |
898 | static ssize_t ecard_show_device(struct device *dev, struct device_attribute *attr, char *buf) |
899 | { |
900 | struct expansion_card *ec = ECARD_DEV(dev); |
901 | return sprintf(buf, "%u\n", ec->cid.product); |
902 | } |
903 | |
904 | static ssize_t ecard_show_type(struct device *dev, struct device_attribute *attr, char *buf) |
905 | { |
906 | struct expansion_card *ec = ECARD_DEV(dev); |
907 | return sprintf(buf, "%s\n", ec->easi ? "EASI" : "IOC"); |
908 | } |
909 | |
910 | static struct device_attribute ecard_dev_attrs[] = { |
911 | __ATTR(device, S_IRUGO, ecard_show_device, NULL), |
912 | __ATTR(dma, S_IRUGO, ecard_show_dma, NULL), |
913 | __ATTR(irq, S_IRUGO, ecard_show_irq, NULL), |
914 | __ATTR(resource, S_IRUGO, ecard_show_resources, NULL), |
915 | __ATTR(type, S_IRUGO, ecard_show_type, NULL), |
916 | __ATTR(vendor, S_IRUGO, ecard_show_vendor, NULL), |
917 | __ATTR_NULL, |
918 | }; |
919 | |
920 | |
921 | int ecard_request_resources(struct expansion_card *ec) |
922 | { |
923 | int i, err = 0; |
924 | |
925 | for (i = 0; i < ECARD_NUM_RESOURCES; i++) { |
926 | if (ecard_resource_end(ec, i) && |
927 | !request_mem_region(ecard_resource_start(ec, i), |
928 | ecard_resource_len(ec, i), |
929 | ec->dev.driver->name)) { |
930 | err = -EBUSY; |
931 | break; |
932 | } |
933 | } |
934 | |
935 | if (err) { |
936 | while (i--) |
937 | if (ecard_resource_end(ec, i)) |
938 | release_mem_region(ecard_resource_start(ec, i), |
939 | ecard_resource_len(ec, i)); |
940 | } |
941 | return err; |
942 | } |
943 | EXPORT_SYMBOL(ecard_request_resources); |
944 | |
945 | void ecard_release_resources(struct expansion_card *ec) |
946 | { |
947 | int i; |
948 | |
949 | for (i = 0; i < ECARD_NUM_RESOURCES; i++) |
950 | if (ecard_resource_end(ec, i)) |
951 | release_mem_region(ecard_resource_start(ec, i), |
952 | ecard_resource_len(ec, i)); |
953 | } |
954 | EXPORT_SYMBOL(ecard_release_resources); |
955 | |
956 | void ecard_setirq(struct expansion_card *ec, const struct expansion_card_ops *ops, void *irq_data) |
957 | { |
958 | ec->irq_data = irq_data; |
959 | barrier(); |
960 | ec->ops = ops; |
961 | } |
962 | EXPORT_SYMBOL(ecard_setirq); |
963 | |
964 | void __iomem *ecardm_iomap(struct expansion_card *ec, unsigned int res, |
965 | unsigned long offset, unsigned long maxsize) |
966 | { |
967 | unsigned long start = ecard_resource_start(ec, res); |
968 | unsigned long end = ecard_resource_end(ec, res); |
969 | |
970 | if (offset > (end - start)) |
971 | return NULL; |
972 | |
973 | start += offset; |
974 | if (maxsize && end - start > maxsize) |
975 | end = start + maxsize; |
976 | |
977 | return devm_ioremap(&ec->dev, start, end - start); |
978 | } |
979 | EXPORT_SYMBOL(ecardm_iomap); |
980 | |
981 | /* |
982 | * Probe for an expansion card. |
983 | * |
984 | * If bit 1 of the first byte of the card is set, then the |
985 | * card does not exist. |
986 | */ |
987 | static int __init |
988 | ecard_probe(int slot, card_type_t type) |
989 | { |
990 | ecard_t **ecp; |
991 | ecard_t *ec; |
992 | struct ex_ecid cid; |
993 | int i, rc; |
994 | |
995 | ec = ecard_alloc_card(type, slot); |
996 | if (IS_ERR(ec)) { |
997 | rc = PTR_ERR(ec); |
998 | goto nomem; |
999 | } |
1000 | |
1001 | rc = -ENODEV; |
1002 | if ((ec->podaddr = __ecard_address(ec, type, ECARD_SYNC)) == 0) |
1003 | goto nodev; |
1004 | |
1005 | cid.r_zero = 1; |
1006 | ecard_readbytes(&cid, ec, 0, 16, 0); |
1007 | if (cid.r_zero) |
1008 | goto nodev; |
1009 | |
1010 | ec->cid.id = cid.r_id; |
1011 | ec->cid.cd = cid.r_cd; |
1012 | ec->cid.is = cid.r_is; |
1013 | ec->cid.w = cid.r_w; |
1014 | ec->cid.manufacturer = ecard_getu16(cid.r_manu); |
1015 | ec->cid.product = ecard_getu16(cid.r_prod); |
1016 | ec->cid.country = cid.r_country; |
1017 | ec->cid.irqmask = cid.r_irqmask; |
1018 | ec->cid.irqoff = ecard_gets24(cid.r_irqoff); |
1019 | ec->cid.fiqmask = cid.r_fiqmask; |
1020 | ec->cid.fiqoff = ecard_gets24(cid.r_fiqoff); |
1021 | ec->fiqaddr = |
1022 | ec->irqaddr = (void __iomem *)ioaddr(ec->podaddr); |
1023 | |
1024 | if (ec->cid.is) { |
1025 | ec->irqmask = ec->cid.irqmask; |
1026 | ec->irqaddr += ec->cid.irqoff; |
1027 | ec->fiqmask = ec->cid.fiqmask; |
1028 | ec->fiqaddr += ec->cid.fiqoff; |
1029 | } else { |
1030 | ec->irqmask = 1; |
1031 | ec->fiqmask = 4; |
1032 | } |
1033 | |
1034 | for (i = 0; i < ARRAY_SIZE(blacklist); i++) |
1035 | if (blacklist[i].manufacturer == ec->cid.manufacturer && |
1036 | blacklist[i].product == ec->cid.product) { |
1037 | ec->card_desc = blacklist[i].type; |
1038 | break; |
1039 | } |
1040 | |
1041 | /* |
1042 | * hook the interrupt handlers |
1043 | */ |
1044 | if (slot < 8) { |
1045 | ec->irq = 32 + slot; |
1046 | set_irq_chip(ec->irq, &ecard_chip); |
1047 | set_irq_handler(ec->irq, handle_level_irq); |
1048 | set_irq_flags(ec->irq, IRQF_VALID); |
1049 | } |
1050 | |
1051 | #ifdef IO_EC_MEMC8_BASE |
1052 | if (slot == 8) |
1053 | ec->irq = 11; |
1054 | #endif |
1055 | #ifdef CONFIG_ARCH_RPC |
1056 | /* On RiscPC, only first two slots have DMA capability */ |
1057 | if (slot < 2) |
1058 | ec->dma = 2 + slot; |
1059 | #endif |
1060 | |
1061 | for (ecp = &cards; *ecp; ecp = &(*ecp)->next); |
1062 | |
1063 | *ecp = ec; |
1064 | slot_to_expcard[slot] = ec; |
1065 | |
1066 | device_register(&ec->dev); |
1067 | |
1068 | return 0; |
1069 | |
1070 | nodev: |
1071 | ecard_free_card(ec); |
1072 | nomem: |
1073 | return rc; |
1074 | } |
1075 | |
1076 | /* |
1077 | * Initialise the expansion card system. |
1078 | * Locate all hardware - interrupt management and |
1079 | * actual cards. |
1080 | */ |
1081 | static int __init ecard_init(void) |
1082 | { |
1083 | struct task_struct *task; |
1084 | int slot, irqhw; |
1085 | |
1086 | task = kthread_run(ecard_task, NULL, "kecardd"); |
1087 | if (IS_ERR(task)) { |
1088 | printk(KERN_ERR "Ecard: unable to create kernel thread: %ld\n", |
1089 | PTR_ERR(task)); |
1090 | return PTR_ERR(task); |
1091 | } |
1092 | |
1093 | printk("Probing expansion cards\n"); |
1094 | |
1095 | for (slot = 0; slot < 8; slot ++) { |
1096 | if (ecard_probe(slot, ECARD_EASI) == -ENODEV) |
1097 | ecard_probe(slot, ECARD_IOC); |
1098 | } |
1099 | |
1100 | #ifdef IO_EC_MEMC8_BASE |
1101 | ecard_probe(8, ECARD_IOC); |
1102 | #endif |
1103 | |
1104 | irqhw = ecard_probeirqhw(); |
1105 | |
1106 | set_irq_chained_handler(IRQ_EXPANSIONCARD, |
1107 | irqhw ? ecard_irqexp_handler : ecard_irq_handler); |
1108 | |
1109 | ecard_proc_init(); |
1110 | |
1111 | return 0; |
1112 | } |
1113 | |
1114 | subsys_initcall(ecard_init); |
1115 | |
1116 | /* |
1117 | * ECARD "bus" |
1118 | */ |
1119 | static const struct ecard_id * |
1120 | ecard_match_device(const struct ecard_id *ids, struct expansion_card *ec) |
1121 | { |
1122 | int i; |
1123 | |
1124 | for (i = 0; ids[i].manufacturer != 65535; i++) |
1125 | if (ec->cid.manufacturer == ids[i].manufacturer && |
1126 | ec->cid.product == ids[i].product) |
1127 | return ids + i; |
1128 | |
1129 | return NULL; |
1130 | } |
1131 | |
1132 | static int ecard_drv_probe(struct device *dev) |
1133 | { |
1134 | struct expansion_card *ec = ECARD_DEV(dev); |
1135 | struct ecard_driver *drv = ECARD_DRV(dev->driver); |
1136 | const struct ecard_id *id; |
1137 | int ret; |
1138 | |
1139 | id = ecard_match_device(drv->id_table, ec); |
1140 | |
1141 | ec->claimed = 1; |
1142 | ret = drv->probe(ec, id); |
1143 | if (ret) |
1144 | ec->claimed = 0; |
1145 | return ret; |
1146 | } |
1147 | |
1148 | static int ecard_drv_remove(struct device *dev) |
1149 | { |
1150 | struct expansion_card *ec = ECARD_DEV(dev); |
1151 | struct ecard_driver *drv = ECARD_DRV(dev->driver); |
1152 | |
1153 | drv->remove(ec); |
1154 | ec->claimed = 0; |
1155 | |
1156 | /* |
1157 | * Restore the default operations. We ensure that the |
1158 | * ops are set before we change the data. |
1159 | */ |
1160 | ec->ops = &ecard_default_ops; |
1161 | barrier(); |
1162 | ec->irq_data = NULL; |
1163 | |
1164 | return 0; |
1165 | } |
1166 | |
1167 | /* |
1168 | * Before rebooting, we must make sure that the expansion card is in a |
1169 | * sensible state, so it can be re-detected. This means that the first |
1170 | * page of the ROM must be visible. We call the expansion cards reset |
1171 | * handler, if any. |
1172 | */ |
1173 | static void ecard_drv_shutdown(struct device *dev) |
1174 | { |
1175 | struct expansion_card *ec = ECARD_DEV(dev); |
1176 | struct ecard_driver *drv = ECARD_DRV(dev->driver); |
1177 | struct ecard_request req; |
1178 | |
1179 | if (dev->driver) { |
1180 | if (drv->shutdown) |
1181 | drv->shutdown(ec); |
1182 | ec->claimed = 0; |
1183 | } |
1184 | |
1185 | /* |
1186 | * If this card has a loader, call the reset handler. |
1187 | */ |
1188 | if (ec->loader) { |
1189 | req.fn = ecard_task_reset; |
1190 | req.ec = ec; |
1191 | ecard_call(&req); |
1192 | } |
1193 | } |
1194 | |
1195 | int ecard_register_driver(struct ecard_driver *drv) |
1196 | { |
1197 | drv->drv.bus = &ecard_bus_type; |
1198 | |
1199 | return driver_register(&drv->drv); |
1200 | } |
1201 | |
1202 | void ecard_remove_driver(struct ecard_driver *drv) |
1203 | { |
1204 | driver_unregister(&drv->drv); |
1205 | } |
1206 | |
1207 | static int ecard_match(struct device *_dev, struct device_driver *_drv) |
1208 | { |
1209 | struct expansion_card *ec = ECARD_DEV(_dev); |
1210 | struct ecard_driver *drv = ECARD_DRV(_drv); |
1211 | int ret; |
1212 | |
1213 | if (drv->id_table) { |
1214 | ret = ecard_match_device(drv->id_table, ec) != NULL; |
1215 | } else { |
1216 | ret = ec->cid.id == drv->id; |
1217 | } |
1218 | |
1219 | return ret; |
1220 | } |
1221 | |
1222 | struct bus_type ecard_bus_type = { |
1223 | .name = "ecard", |
1224 | .dev_attrs = ecard_dev_attrs, |
1225 | .match = ecard_match, |
1226 | .probe = ecard_drv_probe, |
1227 | .remove = ecard_drv_remove, |
1228 | .shutdown = ecard_drv_shutdown, |
1229 | }; |
1230 | |
1231 | static int ecard_bus_init(void) |
1232 | { |
1233 | return bus_register(&ecard_bus_type); |
1234 | } |
1235 | |
1236 | postcore_initcall(ecard_bus_init); |
1237 | |
1238 | EXPORT_SYMBOL(ecard_readchunk); |
1239 | EXPORT_SYMBOL(ecard_register_driver); |
1240 | EXPORT_SYMBOL(ecard_remove_driver); |
1241 | EXPORT_SYMBOL(ecard_bus_type); |
1242 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
jz-2.6.38
jz-2.6.39
jz-3.0
jz-3.1
jz-3.11
jz-3.12
jz-3.13
jz-3.15
jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9