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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> |
b4ac0849 | 45 | #include <linux/irq.h> |
10bdaaa0 | 46 | #include <linux/io.h> |
1da177e4 LT |
47 | |
48 | #include <asm/dma.h> | |
49 | #include <asm/ecard.h> | |
a09e64fb | 50 | #include <mach/hardware.h> |
1da177e4 LT |
51 | #include <asm/irq.h> |
52 | #include <asm/mmu_context.h> | |
53 | #include <asm/mach/irq.h> | |
54 | #include <asm/tlbflush.h> | |
55 | ||
c0b04d1b RK |
56 | #include "ecard.h" |
57 | ||
1da177e4 LT |
58 | struct ecard_request { |
59 | void (*fn)(struct ecard_request *); | |
60 | ecard_t *ec; | |
61 | unsigned int address; | |
62 | unsigned int length; | |
63 | unsigned int use_loader; | |
64 | void *buffer; | |
65 | struct completion *complete; | |
66 | }; | |
67 | ||
68 | struct expcard_blacklist { | |
69 | unsigned short manufacturer; | |
70 | unsigned short product; | |
71 | const char *type; | |
72 | }; | |
73 | ||
74 | static ecard_t *cards; | |
75 | static ecard_t *slot_to_expcard[MAX_ECARDS]; | |
76 | static unsigned int ectcr; | |
1da177e4 LT |
77 | |
78 | /* List of descriptions of cards which don't have an extended | |
79 | * identification, or chunk directories containing a description. | |
80 | */ | |
81 | static struct expcard_blacklist __initdata blacklist[] = { | |
82 | { MANU_ACORN, PROD_ACORN_ETHER1, "Acorn Ether1" } | |
83 | }; | |
84 | ||
85 | asmlinkage extern int | |
86 | ecard_loader_reset(unsigned long base, loader_t loader); | |
87 | asmlinkage extern int | |
88 | ecard_loader_read(int off, unsigned long base, loader_t loader); | |
89 | ||
90 | static inline unsigned short ecard_getu16(unsigned char *v) | |
91 | { | |
92 | return v[0] | v[1] << 8; | |
93 | } | |
94 | ||
95 | static inline signed long ecard_gets24(unsigned char *v) | |
96 | { | |
97 | return v[0] | v[1] << 8 | v[2] << 16 | ((v[2] & 0x80) ? 0xff000000 : 0); | |
98 | } | |
99 | ||
100 | static inline ecard_t *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 | static void ecard_task_reset(struct ecard_request *req) | |
118 | { | |
119 | struct expansion_card *ec = req->ec; | |
120 | struct resource *res; | |
121 | ||
122 | res = ec->slot_no == 8 | |
123 | ? &ec->resource[ECARD_RES_MEMC] | |
5559bca8 | 124 | : ec->easi |
1da177e4 LT |
125 | ? &ec->resource[ECARD_RES_EASI] |
126 | : &ec->resource[ECARD_RES_IOCSYNC]; | |
127 | ||
128 | ecard_loader_reset(res->start, ec->loader); | |
129 | } | |
130 | ||
131 | static void ecard_task_readbytes(struct ecard_request *req) | |
132 | { | |
133 | struct expansion_card *ec = req->ec; | |
134 | unsigned char *buf = req->buffer; | |
135 | unsigned int len = req->length; | |
136 | unsigned int off = req->address; | |
137 | ||
138 | if (ec->slot_no == 8) { | |
139 | void __iomem *base = (void __iomem *) | |
140 | ec->resource[ECARD_RES_MEMC].start; | |
141 | ||
142 | /* | |
143 | * The card maintains an index which increments the address | |
144 | * into a 4096-byte page on each access. We need to keep | |
145 | * track of the counter. | |
146 | */ | |
147 | static unsigned int index; | |
148 | unsigned int page; | |
149 | ||
150 | page = (off >> 12) * 4; | |
151 | if (page > 256 * 4) | |
152 | return; | |
153 | ||
154 | off &= 4095; | |
155 | ||
156 | /* | |
157 | * If we are reading offset 0, or our current index is | |
158 | * greater than the offset, reset the hardware index counter. | |
159 | */ | |
160 | if (off == 0 || index > off) { | |
161 | writeb(0, base); | |
162 | index = 0; | |
163 | } | |
164 | ||
165 | /* | |
166 | * Increment the hardware index counter until we get to the | |
167 | * required offset. The read bytes are discarded. | |
168 | */ | |
169 | while (index < off) { | |
170 | readb(base + page); | |
171 | index += 1; | |
172 | } | |
173 | ||
174 | while (len--) { | |
175 | *buf++ = readb(base + page); | |
176 | index += 1; | |
177 | } | |
178 | } else { | |
5559bca8 | 179 | unsigned long base = (ec->easi |
1da177e4 LT |
180 | ? &ec->resource[ECARD_RES_EASI] |
181 | : &ec->resource[ECARD_RES_IOCSYNC])->start; | |
182 | void __iomem *pbase = (void __iomem *)base; | |
183 | ||
184 | if (!req->use_loader || !ec->loader) { | |
185 | off *= 4; | |
186 | while (len--) { | |
187 | *buf++ = readb(pbase + off); | |
188 | off += 4; | |
189 | } | |
190 | } else { | |
191 | while(len--) { | |
192 | /* | |
193 | * The following is required by some | |
194 | * expansion card loader programs. | |
195 | */ | |
196 | *(unsigned long *)0x108 = 0; | |
197 | *buf++ = ecard_loader_read(off++, base, | |
198 | ec->loader); | |
199 | } | |
200 | } | |
201 | } | |
202 | ||
203 | } | |
204 | ||
205 | static DECLARE_WAIT_QUEUE_HEAD(ecard_wait); | |
206 | static struct ecard_request *ecard_req; | |
00431707 | 207 | static DEFINE_MUTEX(ecard_mutex); |
1da177e4 LT |
208 | |
209 | /* | |
210 | * Set up the expansion card daemon's page tables. | |
211 | */ | |
212 | static void ecard_init_pgtables(struct mm_struct *mm) | |
213 | { | |
214 | struct vm_area_struct vma; | |
215 | ||
216 | /* We want to set up the page tables for the following mapping: | |
217 | * Virtual Physical | |
218 | * 0x03000000 0x03000000 | |
219 | * 0x03010000 unmapped | |
220 | * 0x03210000 0x03210000 | |
221 | * 0x03400000 unmapped | |
222 | * 0x08000000 0x08000000 | |
223 | * 0x10000000 unmapped | |
224 | * | |
225 | * FIXME: we don't follow this 100% yet. | |
226 | */ | |
227 | pgd_t *src_pgd, *dst_pgd; | |
228 | ||
229 | src_pgd = pgd_offset(mm, (unsigned long)IO_BASE); | |
230 | dst_pgd = pgd_offset(mm, IO_START); | |
231 | ||
232 | memcpy(dst_pgd, src_pgd, sizeof(pgd_t) * (IO_SIZE / PGDIR_SIZE)); | |
233 | ||
5e4cdb83 | 234 | src_pgd = pgd_offset(mm, (unsigned long)EASI_BASE); |
1da177e4 LT |
235 | dst_pgd = pgd_offset(mm, EASI_START); |
236 | ||
237 | memcpy(dst_pgd, src_pgd, sizeof(pgd_t) * (EASI_SIZE / PGDIR_SIZE)); | |
238 | ||
81caaf25 | 239 | vma.vm_flags = VM_EXEC; |
1da177e4 LT |
240 | vma.vm_mm = mm; |
241 | ||
242 | flush_tlb_range(&vma, IO_START, IO_START + IO_SIZE); | |
243 | flush_tlb_range(&vma, EASI_START, EASI_START + EASI_SIZE); | |
244 | } | |
245 | ||
246 | static int ecard_init_mm(void) | |
247 | { | |
248 | struct mm_struct * mm = mm_alloc(); | |
249 | struct mm_struct *active_mm = current->active_mm; | |
250 | ||
251 | if (!mm) | |
252 | return -ENOMEM; | |
253 | ||
254 | current->mm = mm; | |
255 | current->active_mm = mm; | |
256 | activate_mm(active_mm, mm); | |
257 | mmdrop(active_mm); | |
258 | ecard_init_pgtables(mm); | |
259 | return 0; | |
260 | } | |
261 | ||
262 | static int | |
263 | ecard_task(void * unused) | |
264 | { | |
1da177e4 LT |
265 | /* |
266 | * Allocate a mm. We're not a lazy-TLB kernel task since we need | |
267 | * to set page table entries where the user space would be. Note | |
268 | * that this also creates the page tables. Failure is not an | |
269 | * option here. | |
270 | */ | |
271 | if (ecard_init_mm()) | |
272 | panic("kecardd: unable to alloc mm\n"); | |
273 | ||
274 | while (1) { | |
275 | struct ecard_request *req; | |
276 | ||
277 | wait_event_interruptible(ecard_wait, ecard_req != NULL); | |
278 | ||
279 | req = xchg(&ecard_req, NULL); | |
280 | if (req != NULL) { | |
281 | req->fn(req); | |
282 | complete(req->complete); | |
283 | } | |
284 | } | |
285 | } | |
286 | ||
287 | /* | |
288 | * Wake the expansion card daemon to action our request. | |
289 | * | |
290 | * FIXME: The test here is not sufficient to detect if the | |
291 | * kcardd is running. | |
292 | */ | |
293 | static void ecard_call(struct ecard_request *req) | |
294 | { | |
6e9a4738 | 295 | DECLARE_COMPLETION_ONSTACK(completion); |
1da177e4 LT |
296 | |
297 | req->complete = &completion; | |
298 | ||
00431707 | 299 | mutex_lock(&ecard_mutex); |
1da177e4 LT |
300 | ecard_req = req; |
301 | wake_up(&ecard_wait); | |
302 | ||
303 | /* | |
304 | * Now wait for kecardd to run. | |
305 | */ | |
306 | wait_for_completion(&completion); | |
00431707 | 307 | mutex_unlock(&ecard_mutex); |
1da177e4 LT |
308 | } |
309 | ||
310 | /* ======================= Mid-level card control ===================== */ | |
311 | ||
312 | static void | |
313 | ecard_readbytes(void *addr, ecard_t *ec, int off, int len, int useld) | |
314 | { | |
315 | struct ecard_request req; | |
316 | ||
317 | req.fn = ecard_task_readbytes; | |
318 | req.ec = ec; | |
319 | req.address = off; | |
320 | req.length = len; | |
321 | req.use_loader = useld; | |
322 | req.buffer = addr; | |
323 | ||
324 | ecard_call(&req); | |
325 | } | |
326 | ||
327 | int ecard_readchunk(struct in_chunk_dir *cd, ecard_t *ec, int id, int num) | |
328 | { | |
329 | struct ex_chunk_dir excd; | |
330 | int index = 16; | |
331 | int useld = 0; | |
332 | ||
333 | if (!ec->cid.cd) | |
334 | return 0; | |
335 | ||
336 | while(1) { | |
337 | ecard_readbytes(&excd, ec, index, 8, useld); | |
338 | index += 8; | |
339 | if (c_id(&excd) == 0) { | |
340 | if (!useld && ec->loader) { | |
341 | useld = 1; | |
342 | index = 0; | |
343 | continue; | |
344 | } | |
345 | return 0; | |
346 | } | |
347 | if (c_id(&excd) == 0xf0) { /* link */ | |
348 | index = c_start(&excd); | |
349 | continue; | |
350 | } | |
351 | if (c_id(&excd) == 0x80) { /* loader */ | |
352 | if (!ec->loader) { | |
5cbded58 | 353 | ec->loader = kmalloc(c_len(&excd), |
1da177e4 LT |
354 | GFP_KERNEL); |
355 | if (ec->loader) | |
356 | ecard_readbytes(ec->loader, ec, | |
357 | (int)c_start(&excd), | |
358 | c_len(&excd), useld); | |
359 | else | |
360 | return 0; | |
361 | } | |
362 | continue; | |
363 | } | |
364 | if (c_id(&excd) == id && num-- == 0) | |
365 | break; | |
366 | } | |
367 | ||
368 | if (c_id(&excd) & 0x80) { | |
369 | switch (c_id(&excd) & 0x70) { | |
370 | case 0x70: | |
371 | ecard_readbytes((unsigned char *)excd.d.string, ec, | |
372 | (int)c_start(&excd), c_len(&excd), | |
373 | useld); | |
374 | break; | |
375 | case 0x00: | |
376 | break; | |
377 | } | |
378 | } | |
379 | cd->start_offset = c_start(&excd); | |
380 | memcpy(cd->d.string, excd.d.string, 256); | |
381 | return 1; | |
382 | } | |
383 | ||
384 | /* ======================= Interrupt control ============================ */ | |
385 | ||
386 | static void ecard_def_irq_enable(ecard_t *ec, int irqnr) | |
387 | { | |
1da177e4 LT |
388 | } |
389 | ||
390 | static void ecard_def_irq_disable(ecard_t *ec, int irqnr) | |
391 | { | |
1da177e4 LT |
392 | } |
393 | ||
394 | static int ecard_def_irq_pending(ecard_t *ec) | |
395 | { | |
396 | return !ec->irqmask || readb(ec->irqaddr) & ec->irqmask; | |
397 | } | |
398 | ||
399 | static void ecard_def_fiq_enable(ecard_t *ec, int fiqnr) | |
400 | { | |
401 | panic("ecard_def_fiq_enable called - impossible"); | |
402 | } | |
403 | ||
404 | static void ecard_def_fiq_disable(ecard_t *ec, int fiqnr) | |
405 | { | |
406 | panic("ecard_def_fiq_disable called - impossible"); | |
407 | } | |
408 | ||
409 | static int ecard_def_fiq_pending(ecard_t *ec) | |
410 | { | |
411 | return !ec->fiqmask || readb(ec->fiqaddr) & ec->fiqmask; | |
412 | } | |
413 | ||
414 | static expansioncard_ops_t ecard_default_ops = { | |
415 | ecard_def_irq_enable, | |
416 | ecard_def_irq_disable, | |
417 | ecard_def_irq_pending, | |
418 | ecard_def_fiq_enable, | |
419 | ecard_def_fiq_disable, | |
420 | ecard_def_fiq_pending | |
421 | }; | |
422 | ||
423 | /* | |
424 | * Enable and disable interrupts from expansion cards. | |
425 | * (interrupts are disabled for these functions). | |
426 | * | |
427 | * They are not meant to be called directly, but via enable/disable_irq. | |
428 | */ | |
4a87bac4 | 429 | static void ecard_irq_unmask(struct irq_data *d) |
1da177e4 | 430 | { |
c402c110 | 431 | ecard_t *ec = irq_data_get_irq_chip_data(d); |
1da177e4 LT |
432 | |
433 | if (ec) { | |
434 | if (!ec->ops) | |
435 | ec->ops = &ecard_default_ops; | |
436 | ||
437 | if (ec->claimed && ec->ops->irqenable) | |
4a87bac4 | 438 | ec->ops->irqenable(ec, d->irq); |
1da177e4 LT |
439 | else |
440 | printk(KERN_ERR "ecard: rejecting request to " | |
4a87bac4 | 441 | "enable IRQs for %d\n", d->irq); |
1da177e4 LT |
442 | } |
443 | } | |
444 | ||
4a87bac4 | 445 | static void ecard_irq_mask(struct irq_data *d) |
1da177e4 | 446 | { |
c402c110 | 447 | ecard_t *ec = irq_data_get_irq_chip_data(d); |
1da177e4 LT |
448 | |
449 | if (ec) { | |
450 | if (!ec->ops) | |
451 | ec->ops = &ecard_default_ops; | |
452 | ||
453 | if (ec->ops && ec->ops->irqdisable) | |
4a87bac4 | 454 | ec->ops->irqdisable(ec, d->irq); |
1da177e4 LT |
455 | } |
456 | } | |
457 | ||
38c677cb | 458 | static struct irq_chip ecard_chip = { |
4a87bac4 LB |
459 | .name = "ECARD", |
460 | .irq_ack = ecard_irq_mask, | |
461 | .irq_mask = ecard_irq_mask, | |
462 | .irq_unmask = ecard_irq_unmask, | |
1da177e4 LT |
463 | }; |
464 | ||
465 | void ecard_enablefiq(unsigned int fiqnr) | |
466 | { | |
467 | ecard_t *ec = slot_to_ecard(fiqnr); | |
468 | ||
469 | if (ec) { | |
470 | if (!ec->ops) | |
471 | ec->ops = &ecard_default_ops; | |
472 | ||
473 | if (ec->claimed && ec->ops->fiqenable) | |
474 | ec->ops->fiqenable(ec, fiqnr); | |
475 | else | |
476 | printk(KERN_ERR "ecard: rejecting request to " | |
477 | "enable FIQs for %d\n", fiqnr); | |
478 | } | |
479 | } | |
480 | ||
481 | void ecard_disablefiq(unsigned int fiqnr) | |
482 | { | |
483 | ecard_t *ec = slot_to_ecard(fiqnr); | |
484 | ||
485 | if (ec) { | |
486 | if (!ec->ops) | |
487 | ec->ops = &ecard_default_ops; | |
488 | ||
489 | if (ec->ops->fiqdisable) | |
490 | ec->ops->fiqdisable(ec, fiqnr); | |
491 | } | |
492 | } | |
493 | ||
494 | static void ecard_dump_irq_state(void) | |
495 | { | |
496 | ecard_t *ec; | |
497 | ||
498 | printk("Expansion card IRQ state:\n"); | |
499 | ||
500 | for (ec = cards; ec; ec = ec->next) { | |
501 | if (ec->slot_no == 8) | |
502 | continue; | |
503 | ||
504 | printk(" %d: %sclaimed, ", | |
505 | ec->slot_no, ec->claimed ? "" : "not "); | |
506 | ||
507 | if (ec->ops && ec->ops->irqpending && | |
508 | ec->ops != &ecard_default_ops) | |
509 | printk("irq %spending\n", | |
510 | ec->ops->irqpending(ec) ? "" : "not "); | |
511 | else | |
512 | printk("irqaddr %p, mask = %02X, status = %02X\n", | |
513 | ec->irqaddr, ec->irqmask, readb(ec->irqaddr)); | |
514 | } | |
515 | } | |
516 | ||
10dd5ce2 | 517 | static void ecard_check_lockup(struct irq_desc *desc) |
1da177e4 LT |
518 | { |
519 | static unsigned long last; | |
520 | static int lockup; | |
521 | ||
522 | /* | |
523 | * If the timer interrupt has not run since the last million | |
524 | * unrecognised expansion card interrupts, then there is | |
525 | * something seriously wrong. Disable the expansion card | |
526 | * interrupts so at least we can continue. | |
527 | * | |
528 | * Maybe we ought to start a timer to re-enable them some time | |
529 | * later? | |
530 | */ | |
531 | if (last == jiffies) { | |
532 | lockup += 1; | |
533 | if (lockup > 1000000) { | |
534 | printk(KERN_ERR "\nInterrupt lockup detected - " | |
535 | "disabling all expansion card interrupts\n"); | |
536 | ||
4a87bac4 | 537 | desc->irq_data.chip->irq_mask(&desc->irq_data); |
1da177e4 LT |
538 | ecard_dump_irq_state(); |
539 | } | |
540 | } else | |
541 | lockup = 0; | |
542 | ||
543 | /* | |
544 | * If we did not recognise the source of this interrupt, | |
545 | * warn the user, but don't flood the user with these messages. | |
546 | */ | |
547 | if (!last || time_after(jiffies, last + 5*HZ)) { | |
548 | last = jiffies; | |
549 | printk(KERN_WARNING "Unrecognised interrupt from backplane\n"); | |
550 | ecard_dump_irq_state(); | |
551 | } | |
552 | } | |
553 | ||
554 | static void | |
10dd5ce2 | 555 | ecard_irq_handler(unsigned int irq, struct irq_desc *desc) |
1da177e4 LT |
556 | { |
557 | ecard_t *ec; | |
558 | int called = 0; | |
559 | ||
4a87bac4 | 560 | desc->irq_data.chip->irq_mask(&desc->irq_data); |
1da177e4 LT |
561 | for (ec = cards; ec; ec = ec->next) { |
562 | int pending; | |
563 | ||
41569e37 | 564 | if (!ec->claimed || !ec->irq || ec->slot_no == 8) |
1da177e4 LT |
565 | continue; |
566 | ||
567 | if (ec->ops && ec->ops->irqpending) | |
568 | pending = ec->ops->irqpending(ec); | |
569 | else | |
570 | pending = ecard_default_ops.irqpending(ec); | |
571 | ||
572 | if (pending) { | |
d8aa0251 | 573 | generic_handle_irq(ec->irq); |
1da177e4 LT |
574 | called ++; |
575 | } | |
576 | } | |
4a87bac4 | 577 | desc->irq_data.chip->irq_unmask(&desc->irq_data); |
1da177e4 LT |
578 | |
579 | if (called == 0) | |
580 | ecard_check_lockup(desc); | |
581 | } | |
582 | ||
1ace7566 | 583 | static void __iomem *__ecard_address(ecard_t *ec, card_type_t type, card_speed_t speed) |
1da177e4 | 584 | { |
06cf0b54 | 585 | void __iomem *address = NULL; |
1da177e4 LT |
586 | int slot = ec->slot_no; |
587 | ||
588 | if (ec->slot_no == 8) | |
06cf0b54 | 589 | return ECARD_MEMC8_BASE; |
1da177e4 LT |
590 | |
591 | ectcr &= ~(1 << slot); | |
592 | ||
593 | switch (type) { | |
594 | case ECARD_MEMC: | |
595 | if (slot < 4) | |
06cf0b54 | 596 | address = ECARD_MEMC_BASE + (slot << 14); |
1da177e4 LT |
597 | break; |
598 | ||
599 | case ECARD_IOC: | |
600 | if (slot < 4) | |
06cf0b54 | 601 | address = ECARD_IOC_BASE + (slot << 14); |
1da177e4 | 602 | else |
06cf0b54 | 603 | address = ECARD_IOC4_BASE + ((slot - 4) << 14); |
1da177e4 | 604 | if (address) |
06cf0b54 | 605 | address += speed << 19; |
1da177e4 LT |
606 | break; |
607 | ||
1da177e4 | 608 | case ECARD_EASI: |
06cf0b54 | 609 | address = ECARD_EASI_BASE + (slot << 24); |
1da177e4 LT |
610 | if (speed == ECARD_FAST) |
611 | ectcr |= 1 << slot; | |
612 | break; | |
06cf0b54 | 613 | |
1da177e4 LT |
614 | default: |
615 | break; | |
616 | } | |
617 | ||
618 | #ifdef IOMD_ECTCR | |
619 | iomd_writeb(ectcr, IOMD_ECTCR); | |
620 | #endif | |
06cf0b54 | 621 | return address; |
1da177e4 LT |
622 | } |
623 | ||
9b001212 | 624 | static int ecard_prints(struct seq_file *m, ecard_t *ec) |
1da177e4 | 625 | { |
9b001212 | 626 | seq_printf(m, " %d: %s ", ec->slot_no, ec->easi ? "EASI" : " "); |
1da177e4 LT |
627 | |
628 | if (ec->cid.id == 0) { | |
629 | struct in_chunk_dir incd; | |
630 | ||
9b001212 | 631 | seq_printf(m, "[%04X:%04X] ", |
1da177e4 LT |
632 | ec->cid.manufacturer, ec->cid.product); |
633 | ||
634 | if (!ec->card_desc && ec->cid.cd && | |
635 | ecard_readchunk(&incd, ec, 0xf5, 0)) { | |
636 | ec->card_desc = kmalloc(strlen(incd.d.string)+1, GFP_KERNEL); | |
637 | ||
638 | if (ec->card_desc) | |
639 | strcpy((char *)ec->card_desc, incd.d.string); | |
640 | } | |
641 | ||
9b001212 | 642 | seq_printf(m, "%s\n", ec->card_desc ? ec->card_desc : "*unknown*"); |
1da177e4 | 643 | } else |
9b001212 | 644 | seq_printf(m, "Simple card %d\n", ec->cid.id); |
1da177e4 | 645 | |
9b001212 | 646 | return 0; |
1da177e4 LT |
647 | } |
648 | ||
9b001212 | 649 | static int ecard_devices_proc_show(struct seq_file *m, void *v) |
1da177e4 LT |
650 | { |
651 | ecard_t *ec = cards; | |
9b001212 AD |
652 | |
653 | while (ec) { | |
654 | ecard_prints(m, ec); | |
1da177e4 LT |
655 | ec = ec->next; |
656 | } | |
9b001212 | 657 | return 0; |
1da177e4 LT |
658 | } |
659 | ||
9b001212 AD |
660 | static int ecard_devices_proc_open(struct inode *inode, struct file *file) |
661 | { | |
662 | return single_open(file, ecard_devices_proc_show, NULL); | |
663 | } | |
664 | ||
665 | static const struct file_operations bus_ecard_proc_fops = { | |
666 | .owner = THIS_MODULE, | |
667 | .open = ecard_devices_proc_open, | |
668 | .read = seq_read, | |
669 | .llseek = seq_lseek, | |
670 | .release = single_release, | |
671 | }; | |
672 | ||
1da177e4 LT |
673 | static struct proc_dir_entry *proc_bus_ecard_dir = NULL; |
674 | ||
675 | static void ecard_proc_init(void) | |
676 | { | |
9c37066d | 677 | proc_bus_ecard_dir = proc_mkdir("bus/ecard", NULL); |
9b001212 | 678 | proc_create("devices", 0, proc_bus_ecard_dir, &bus_ecard_proc_fops); |
1da177e4 LT |
679 | } |
680 | ||
681 | #define ec_set_resource(ec,nr,st,sz) \ | |
682 | do { \ | |
3f978704 | 683 | (ec)->resource[nr].name = dev_name(&ec->dev); \ |
1da177e4 LT |
684 | (ec)->resource[nr].start = st; \ |
685 | (ec)->resource[nr].end = (st) + (sz) - 1; \ | |
686 | (ec)->resource[nr].flags = IORESOURCE_MEM; \ | |
687 | } while (0) | |
688 | ||
689 | static void __init ecard_free_card(struct expansion_card *ec) | |
690 | { | |
691 | int i; | |
692 | ||
693 | for (i = 0; i < ECARD_NUM_RESOURCES; i++) | |
694 | if (ec->resource[i].flags) | |
695 | release_resource(&ec->resource[i]); | |
696 | ||
697 | kfree(ec); | |
698 | } | |
699 | ||
700 | static struct expansion_card *__init ecard_alloc_card(int type, int slot) | |
701 | { | |
702 | struct expansion_card *ec; | |
703 | unsigned long base; | |
704 | int i; | |
705 | ||
d2a02b93 | 706 | ec = kzalloc(sizeof(ecard_t), GFP_KERNEL); |
1da177e4 LT |
707 | if (!ec) { |
708 | ec = ERR_PTR(-ENOMEM); | |
709 | goto nomem; | |
710 | } | |
711 | ||
1da177e4 | 712 | ec->slot_no = slot; |
5559bca8 | 713 | ec->easi = type == ECARD_EASI; |
41569e37 RK |
714 | ec->irq = 0; |
715 | ec->fiq = 0; | |
1da177e4 LT |
716 | ec->dma = NO_DMA; |
717 | ec->ops = &ecard_default_ops; | |
718 | ||
1d559e29 | 719 | dev_set_name(&ec->dev, "ecard%d", slot); |
1da177e4 LT |
720 | ec->dev.parent = NULL; |
721 | ec->dev.bus = &ecard_bus_type; | |
722 | ec->dev.dma_mask = &ec->dma_mask; | |
723 | ec->dma_mask = (u64)0xffffffff; | |
69f4f331 | 724 | ec->dev.coherent_dma_mask = ec->dma_mask; |
1da177e4 LT |
725 | |
726 | if (slot < 4) { | |
727 | ec_set_resource(ec, ECARD_RES_MEMC, | |
728 | PODSLOT_MEMC_BASE + (slot << 14), | |
729 | PODSLOT_MEMC_SIZE); | |
730 | base = PODSLOT_IOC0_BASE + (slot << 14); | |
731 | } else | |
732 | base = PODSLOT_IOC4_BASE + ((slot - 4) << 14); | |
733 | ||
734 | #ifdef CONFIG_ARCH_RPC | |
735 | if (slot < 8) { | |
736 | ec_set_resource(ec, ECARD_RES_EASI, | |
737 | PODSLOT_EASI_BASE + (slot << 24), | |
738 | PODSLOT_EASI_SIZE); | |
739 | } | |
740 | ||
741 | if (slot == 8) { | |
742 | ec_set_resource(ec, ECARD_RES_MEMC, NETSLOT_BASE, NETSLOT_SIZE); | |
743 | } else | |
744 | #endif | |
745 | ||
746 | for (i = 0; i <= ECARD_RES_IOCSYNC - ECARD_RES_IOCSLOW; i++) | |
747 | ec_set_resource(ec, i + ECARD_RES_IOCSLOW, | |
748 | base + (i << 19), PODSLOT_IOC_SIZE); | |
749 | ||
750 | for (i = 0; i < ECARD_NUM_RESOURCES; i++) { | |
751 | if (ec->resource[i].flags && | |
752 | request_resource(&iomem_resource, &ec->resource[i])) { | |
fc3a8828 | 753 | dev_err(&ec->dev, "resource(s) not available\n"); |
1da177e4 LT |
754 | ec->resource[i].end -= ec->resource[i].start; |
755 | ec->resource[i].start = 0; | |
756 | ec->resource[i].flags = 0; | |
757 | } | |
758 | } | |
759 | ||
760 | nomem: | |
761 | return ec; | |
762 | } | |
763 | ||
ff381d22 | 764 | static ssize_t ecard_show_irq(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
765 | { |
766 | struct expansion_card *ec = ECARD_DEV(dev); | |
767 | return sprintf(buf, "%u\n", ec->irq); | |
768 | } | |
769 | ||
ff381d22 | 770 | static ssize_t ecard_show_dma(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
771 | { |
772 | struct expansion_card *ec = ECARD_DEV(dev); | |
773 | return sprintf(buf, "%u\n", ec->dma); | |
774 | } | |
775 | ||
ff381d22 | 776 | static ssize_t ecard_show_resources(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
777 | { |
778 | struct expansion_card *ec = ECARD_DEV(dev); | |
779 | char *str = buf; | |
780 | int i; | |
781 | ||
782 | for (i = 0; i < ECARD_NUM_RESOURCES; i++) | |
c9e4143c | 783 | str += sprintf(str, "%08x %08x %08lx\n", |
1da177e4 LT |
784 | ec->resource[i].start, |
785 | ec->resource[i].end, | |
786 | ec->resource[i].flags); | |
787 | ||
788 | return str - buf; | |
789 | } | |
790 | ||
ff381d22 | 791 | static ssize_t ecard_show_vendor(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
792 | { |
793 | struct expansion_card *ec = ECARD_DEV(dev); | |
794 | return sprintf(buf, "%u\n", ec->cid.manufacturer); | |
795 | } | |
796 | ||
ff381d22 | 797 | static ssize_t ecard_show_device(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
798 | { |
799 | struct expansion_card *ec = ECARD_DEV(dev); | |
800 | return sprintf(buf, "%u\n", ec->cid.product); | |
801 | } | |
802 | ||
ff381d22 | 803 | static ssize_t ecard_show_type(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
804 | { |
805 | struct expansion_card *ec = ECARD_DEV(dev); | |
5559bca8 | 806 | return sprintf(buf, "%s\n", ec->easi ? "EASI" : "IOC"); |
1da177e4 LT |
807 | } |
808 | ||
809 | static struct device_attribute ecard_dev_attrs[] = { | |
810 | __ATTR(device, S_IRUGO, ecard_show_device, NULL), | |
811 | __ATTR(dma, S_IRUGO, ecard_show_dma, NULL), | |
812 | __ATTR(irq, S_IRUGO, ecard_show_irq, NULL), | |
813 | __ATTR(resource, S_IRUGO, ecard_show_resources, NULL), | |
814 | __ATTR(type, S_IRUGO, ecard_show_type, NULL), | |
815 | __ATTR(vendor, S_IRUGO, ecard_show_vendor, NULL), | |
816 | __ATTR_NULL, | |
817 | }; | |
818 | ||
819 | ||
820 | int ecard_request_resources(struct expansion_card *ec) | |
821 | { | |
822 | int i, err = 0; | |
823 | ||
824 | for (i = 0; i < ECARD_NUM_RESOURCES; i++) { | |
825 | if (ecard_resource_end(ec, i) && | |
826 | !request_mem_region(ecard_resource_start(ec, i), | |
827 | ecard_resource_len(ec, i), | |
828 | ec->dev.driver->name)) { | |
829 | err = -EBUSY; | |
830 | break; | |
831 | } | |
832 | } | |
833 | ||
834 | if (err) { | |
835 | while (i--) | |
836 | if (ecard_resource_end(ec, i)) | |
837 | release_mem_region(ecard_resource_start(ec, i), | |
838 | ecard_resource_len(ec, i)); | |
839 | } | |
840 | return err; | |
841 | } | |
842 | EXPORT_SYMBOL(ecard_request_resources); | |
843 | ||
844 | void ecard_release_resources(struct expansion_card *ec) | |
845 | { | |
846 | int i; | |
847 | ||
848 | for (i = 0; i < ECARD_NUM_RESOURCES; i++) | |
849 | if (ecard_resource_end(ec, i)) | |
850 | release_mem_region(ecard_resource_start(ec, i), | |
851 | ecard_resource_len(ec, i)); | |
852 | } | |
853 | EXPORT_SYMBOL(ecard_release_resources); | |
854 | ||
c7b87f3d RK |
855 | void ecard_setirq(struct expansion_card *ec, const struct expansion_card_ops *ops, void *irq_data) |
856 | { | |
857 | ec->irq_data = irq_data; | |
858 | barrier(); | |
859 | ec->ops = ops; | |
860 | } | |
861 | EXPORT_SYMBOL(ecard_setirq); | |
862 | ||
10bdaaa0 RK |
863 | void __iomem *ecardm_iomap(struct expansion_card *ec, unsigned int res, |
864 | unsigned long offset, unsigned long maxsize) | |
865 | { | |
866 | unsigned long start = ecard_resource_start(ec, res); | |
867 | unsigned long end = ecard_resource_end(ec, res); | |
868 | ||
869 | if (offset > (end - start)) | |
870 | return NULL; | |
871 | ||
872 | start += offset; | |
873 | if (maxsize && end - start > maxsize) | |
874 | end = start + maxsize; | |
875 | ||
876 | return devm_ioremap(&ec->dev, start, end - start); | |
877 | } | |
878 | EXPORT_SYMBOL(ecardm_iomap); | |
879 | ||
1da177e4 LT |
880 | /* |
881 | * Probe for an expansion card. | |
882 | * | |
883 | * If bit 1 of the first byte of the card is set, then the | |
884 | * card does not exist. | |
885 | */ | |
b4ac0849 | 886 | static int __init ecard_probe(int slot, unsigned irq, card_type_t type) |
1da177e4 LT |
887 | { |
888 | ecard_t **ecp; | |
889 | ecard_t *ec; | |
890 | struct ex_ecid cid; | |
1ace7566 | 891 | void __iomem *addr; |
1da177e4 LT |
892 | int i, rc; |
893 | ||
894 | ec = ecard_alloc_card(type, slot); | |
895 | if (IS_ERR(ec)) { | |
896 | rc = PTR_ERR(ec); | |
897 | goto nomem; | |
898 | } | |
899 | ||
900 | rc = -ENODEV; | |
1ace7566 | 901 | if ((addr = __ecard_address(ec, type, ECARD_SYNC)) == NULL) |
1da177e4 LT |
902 | goto nodev; |
903 | ||
904 | cid.r_zero = 1; | |
905 | ecard_readbytes(&cid, ec, 0, 16, 0); | |
906 | if (cid.r_zero) | |
907 | goto nodev; | |
908 | ||
909 | ec->cid.id = cid.r_id; | |
910 | ec->cid.cd = cid.r_cd; | |
911 | ec->cid.is = cid.r_is; | |
912 | ec->cid.w = cid.r_w; | |
913 | ec->cid.manufacturer = ecard_getu16(cid.r_manu); | |
914 | ec->cid.product = ecard_getu16(cid.r_prod); | |
915 | ec->cid.country = cid.r_country; | |
916 | ec->cid.irqmask = cid.r_irqmask; | |
917 | ec->cid.irqoff = ecard_gets24(cid.r_irqoff); | |
918 | ec->cid.fiqmask = cid.r_fiqmask; | |
919 | ec->cid.fiqoff = ecard_gets24(cid.r_fiqoff); | |
920 | ec->fiqaddr = | |
1ace7566 | 921 | ec->irqaddr = addr; |
1da177e4 LT |
922 | |
923 | if (ec->cid.is) { | |
924 | ec->irqmask = ec->cid.irqmask; | |
925 | ec->irqaddr += ec->cid.irqoff; | |
926 | ec->fiqmask = ec->cid.fiqmask; | |
927 | ec->fiqaddr += ec->cid.fiqoff; | |
928 | } else { | |
929 | ec->irqmask = 1; | |
930 | ec->fiqmask = 4; | |
931 | } | |
932 | ||
eeea82ff | 933 | for (i = 0; i < ARRAY_SIZE(blacklist); i++) |
1da177e4 LT |
934 | if (blacklist[i].manufacturer == ec->cid.manufacturer && |
935 | blacklist[i].product == ec->cid.product) { | |
936 | ec->card_desc = blacklist[i].type; | |
937 | break; | |
938 | } | |
939 | ||
b4ac0849 RK |
940 | ec->irq = irq; |
941 | ||
1da177e4 LT |
942 | /* |
943 | * hook the interrupt handlers | |
944 | */ | |
945 | if (slot < 8) { | |
f38c02f3 TG |
946 | irq_set_chip_and_handler(ec->irq, &ecard_chip, |
947 | handle_level_irq); | |
c402c110 | 948 | irq_set_chip_data(ec->irq, ec); |
e8d36d5d | 949 | irq_clear_status_flags(ec->irq, IRQ_NOREQUEST); |
1da177e4 LT |
950 | } |
951 | ||
1da177e4 LT |
952 | #ifdef CONFIG_ARCH_RPC |
953 | /* On RiscPC, only first two slots have DMA capability */ | |
954 | if (slot < 2) | |
955 | ec->dma = 2 + slot; | |
956 | #endif | |
957 | ||
958 | for (ecp = &cards; *ecp; ecp = &(*ecp)->next); | |
959 | ||
960 | *ecp = ec; | |
961 | slot_to_expcard[slot] = ec; | |
962 | ||
5f07809e AB |
963 | rc = device_register(&ec->dev); |
964 | if (rc) | |
965 | goto nodev; | |
1da177e4 LT |
966 | |
967 | return 0; | |
968 | ||
969 | nodev: | |
970 | ecard_free_card(ec); | |
971 | nomem: | |
972 | return rc; | |
973 | } | |
974 | ||
975 | /* | |
976 | * Initialise the expansion card system. | |
977 | * Locate all hardware - interrupt management and | |
978 | * actual cards. | |
979 | */ | |
980 | static int __init ecard_init(void) | |
981 | { | |
134c99e9 | 982 | struct task_struct *task; |
530c2eaa | 983 | int slot, irqbase; |
b4ac0849 RK |
984 | |
985 | irqbase = irq_alloc_descs(-1, 0, 8, -1); | |
986 | if (irqbase < 0) | |
987 | return irqbase; | |
1da177e4 | 988 | |
134c99e9 EB |
989 | task = kthread_run(ecard_task, NULL, "kecardd"); |
990 | if (IS_ERR(task)) { | |
e6aeb47d | 991 | printk(KERN_ERR "Ecard: unable to create kernel thread: %ld\n", |
134c99e9 | 992 | PTR_ERR(task)); |
b4ac0849 | 993 | irq_free_descs(irqbase, 8); |
134c99e9 | 994 | return PTR_ERR(task); |
1da177e4 LT |
995 | } |
996 | ||
997 | printk("Probing expansion cards\n"); | |
998 | ||
999 | for (slot = 0; slot < 8; slot ++) { | |
b4ac0849 RK |
1000 | if (ecard_probe(slot, irqbase + slot, ECARD_EASI) == -ENODEV) |
1001 | ecard_probe(slot, irqbase + slot, ECARD_IOC); | |
1da177e4 LT |
1002 | } |
1003 | ||
b4ac0849 | 1004 | ecard_probe(8, 11, ECARD_IOC); |
1da177e4 | 1005 | |
530c2eaa | 1006 | irq_set_chained_handler(IRQ_EXPANSIONCARD, ecard_irq_handler); |
1da177e4 LT |
1007 | |
1008 | ecard_proc_init(); | |
1009 | ||
1010 | return 0; | |
1011 | } | |
1012 | ||
1013 | subsys_initcall(ecard_init); | |
1014 | ||
1015 | /* | |
1016 | * ECARD "bus" | |
1017 | */ | |
1018 | static const struct ecard_id * | |
1019 | ecard_match_device(const struct ecard_id *ids, struct expansion_card *ec) | |
1020 | { | |
1021 | int i; | |
1022 | ||
1023 | for (i = 0; ids[i].manufacturer != 65535; i++) | |
1024 | if (ec->cid.manufacturer == ids[i].manufacturer && | |
1025 | ec->cid.product == ids[i].product) | |
1026 | return ids + i; | |
1027 | ||
1028 | return NULL; | |
1029 | } | |
1030 | ||
1031 | static int ecard_drv_probe(struct device *dev) | |
1032 | { | |
1033 | struct expansion_card *ec = ECARD_DEV(dev); | |
1034 | struct ecard_driver *drv = ECARD_DRV(dev->driver); | |
1035 | const struct ecard_id *id; | |
1036 | int ret; | |
1037 | ||
1038 | id = ecard_match_device(drv->id_table, ec); | |
1039 | ||
9ecba1f2 | 1040 | ec->claimed = 1; |
1da177e4 LT |
1041 | ret = drv->probe(ec, id); |
1042 | if (ret) | |
9ecba1f2 | 1043 | ec->claimed = 0; |
1da177e4 LT |
1044 | return ret; |
1045 | } | |
1046 | ||
1047 | static int ecard_drv_remove(struct device *dev) | |
1048 | { | |
1049 | struct expansion_card *ec = ECARD_DEV(dev); | |
1050 | struct ecard_driver *drv = ECARD_DRV(dev->driver); | |
1051 | ||
1052 | drv->remove(ec); | |
9ecba1f2 | 1053 | ec->claimed = 0; |
1da177e4 | 1054 | |
c7b87f3d RK |
1055 | /* |
1056 | * Restore the default operations. We ensure that the | |
1057 | * ops are set before we change the data. | |
1058 | */ | |
1059 | ec->ops = &ecard_default_ops; | |
1060 | barrier(); | |
1061 | ec->irq_data = NULL; | |
1062 | ||
1da177e4 LT |
1063 | return 0; |
1064 | } | |
1065 | ||
1066 | /* | |
1067 | * Before rebooting, we must make sure that the expansion card is in a | |
1068 | * sensible state, so it can be re-detected. This means that the first | |
1069 | * page of the ROM must be visible. We call the expansion cards reset | |
1070 | * handler, if any. | |
1071 | */ | |
1072 | static void ecard_drv_shutdown(struct device *dev) | |
1073 | { | |
1074 | struct expansion_card *ec = ECARD_DEV(dev); | |
1075 | struct ecard_driver *drv = ECARD_DRV(dev->driver); | |
1076 | struct ecard_request req; | |
1077 | ||
e08b7541 RK |
1078 | if (dev->driver) { |
1079 | if (drv->shutdown) | |
1080 | drv->shutdown(ec); | |
9ecba1f2 | 1081 | ec->claimed = 0; |
e08b7541 | 1082 | } |
1da177e4 LT |
1083 | |
1084 | /* | |
1085 | * If this card has a loader, call the reset handler. | |
1086 | */ | |
1087 | if (ec->loader) { | |
1088 | req.fn = ecard_task_reset; | |
1089 | req.ec = ec; | |
1090 | ecard_call(&req); | |
1091 | } | |
1092 | } | |
1093 | ||
1094 | int ecard_register_driver(struct ecard_driver *drv) | |
1095 | { | |
1096 | drv->drv.bus = &ecard_bus_type; | |
1da177e4 LT |
1097 | |
1098 | return driver_register(&drv->drv); | |
1099 | } | |
1100 | ||
1101 | void ecard_remove_driver(struct ecard_driver *drv) | |
1102 | { | |
1103 | driver_unregister(&drv->drv); | |
1104 | } | |
1105 | ||
1106 | static int ecard_match(struct device *_dev, struct device_driver *_drv) | |
1107 | { | |
1108 | struct expansion_card *ec = ECARD_DEV(_dev); | |
1109 | struct ecard_driver *drv = ECARD_DRV(_drv); | |
1110 | int ret; | |
1111 | ||
1112 | if (drv->id_table) { | |
1113 | ret = ecard_match_device(drv->id_table, ec) != NULL; | |
1114 | } else { | |
1115 | ret = ec->cid.id == drv->id; | |
1116 | } | |
1117 | ||
1118 | return ret; | |
1119 | } | |
1120 | ||
1121 | struct bus_type ecard_bus_type = { | |
1122 | .name = "ecard", | |
1123 | .dev_attrs = ecard_dev_attrs, | |
1124 | .match = ecard_match, | |
e08b7541 RK |
1125 | .probe = ecard_drv_probe, |
1126 | .remove = ecard_drv_remove, | |
1127 | .shutdown = ecard_drv_shutdown, | |
1da177e4 LT |
1128 | }; |
1129 | ||
1130 | static int ecard_bus_init(void) | |
1131 | { | |
1132 | return bus_register(&ecard_bus_type); | |
1133 | } | |
1134 | ||
1135 | postcore_initcall(ecard_bus_init); | |
1136 | ||
1137 | EXPORT_SYMBOL(ecard_readchunk); | |
1da177e4 LT |
1138 | EXPORT_SYMBOL(ecard_register_driver); |
1139 | EXPORT_SYMBOL(ecard_remove_driver); | |
1140 | EXPORT_SYMBOL(ecard_bus_type); |