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-rw-r--r--arch/arm26/kernel/ecard.c847
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diff --git a/arch/arm26/kernel/ecard.c b/arch/arm26/kernel/ecard.c
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1/*
2 * linux/arch/arm26/kernel/ecard.c
3 *
4 * Copyright 1995-2001 Russell King
5 * Copyright 2003 Ian Molton
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 *
11 * Find all installed expansion cards, and handle interrupts from them.
12 *
13 * Created from information from Acorns RiscOS3 PRMs
14 * 15-Jun-2003 IM Modified from ARM32 (RiscPC capable) version
15 * 10-Jan-1999 RMK Run loaders in a simulated RISC OS environment.
16 * 06-May-1997 RMK Added blacklist for cards whose loader doesn't work.
17 * 12-Sep-1997 RMK Created new handling of interrupt enables/disables
18 * - cards can now register their own routine to control
19 * interrupts (recommended).
20 * 29-Sep-1997 RMK Expansion card interrupt hardware not being re-enabled
21 * on reset from Linux. (Caused cards not to respond
22 * under RiscOS without hard reset).
23 *
24 */
25#define ECARD_C
26
27#include <linux/module.h>
28#include <linux/kernel.h>
29#include <linux/types.h>
30#include <linux/sched.h>
31#include <linux/interrupt.h>
32#include <linux/reboot.h>
33#include <linux/mm.h>
34#include <linux/slab.h>
35#include <linux/proc_fs.h>
36#include <linux/device.h>
37#include <linux/init.h>
38
39#include <asm/dma.h>
40#include <asm/ecard.h>
41#include <asm/hardware.h>
42#include <asm/io.h>
43#include <asm/irq.h>
44#include <asm/mmu_context.h>
45#include <asm/irqchip.h>
46#include <asm/tlbflush.h>
47
48enum req {
49 req_readbytes,
50 req_reset
51};
52
53struct ecard_request {
54 enum req req;
55 ecard_t *ec;
56 unsigned int address;
57 unsigned int length;
58 unsigned int use_loader;
59 void *buffer;
60};
61
62struct expcard_blacklist {
63 unsigned short manufacturer;
64 unsigned short product;
65 const char *type;
66};
67
68static ecard_t *cards;
69static ecard_t *slot_to_expcard[MAX_ECARDS];
70static unsigned int ectcr;
71
72/* List of descriptions of cards which don't have an extended
73 * identification, or chunk directories containing a description.
74 */
75static struct expcard_blacklist __initdata blacklist[] = {
76 { MANU_ACORN, PROD_ACORN_ETHER1, "Acorn Ether1" }
77};
78
79asmlinkage extern int
80ecard_loader_reset(volatile unsigned char *pa, loader_t loader);
81asmlinkage extern int
82ecard_loader_read(int off, volatile unsigned char *pa, loader_t loader);
83
84static const struct ecard_id *
85ecard_match_device(const struct ecard_id *ids, struct expansion_card *ec);
86
87static inline unsigned short
88ecard_getu16(unsigned char *v)
89{
90 return v[0] | v[1] << 8;
91}
92
93static inline signed long
94ecard_gets24(unsigned char *v)
95{
96 return v[0] | v[1] << 8 | v[2] << 16 | ((v[2] & 0x80) ? 0xff000000 : 0);
97}
98
99static inline ecard_t *
100slot_to_ecard(unsigned int slot)
101{
102 return slot < MAX_ECARDS ? slot_to_expcard[slot] : NULL;
103}
104
105/* ===================== Expansion card daemon ======================== */
106/*
107 * Since the loader programs on the expansion cards need to be run
108 * in a specific environment, create a separate task with this
109 * environment up, and pass requests to this task as and when we
110 * need to.
111 *
112 * This should allow 99% of loaders to be called from Linux.
113 *
114 * From a security standpoint, we trust the card vendors. This
115 * may be a misplaced trust.
116 */
117#define BUS_ADDR(x) ((((unsigned long)(x)) << 2) + IO_BASE)
118#define POD_INT_ADDR(x) ((volatile unsigned char *)\
119 ((BUS_ADDR((x)) - IO_BASE) + IO_START))
120
121static inline void ecard_task_reset(struct ecard_request *req)
122{
123 struct expansion_card *ec = req->ec;
124 if (ec->loader)
125 ecard_loader_reset(POD_INT_ADDR(ec->podaddr), ec->loader);
126}
127
128static void
129ecard_task_readbytes(struct ecard_request *req)
130{
131 unsigned char *buf = (unsigned char *)req->buffer;
132 volatile unsigned char *base_addr =
133 (volatile unsigned char *)POD_INT_ADDR(req->ec->podaddr);
134 unsigned int len = req->length;
135 unsigned int off = req->address;
136
137 if (!req->use_loader || !req->ec->loader) {
138 off *= 4;
139 while (len--) {
140 *buf++ = base_addr[off];
141 off += 4;
142 }
143 } else {
144 while(len--) {
145 /*
146 * The following is required by some
147 * expansion card loader programs.
148 */
149 *(unsigned long *)0x108 = 0;
150 *buf++ = ecard_loader_read(off++, base_addr,
151 req->ec->loader);
152 }
153 }
154}
155
156static void ecard_do_request(struct ecard_request *req)
157{
158 switch (req->req) {
159 case req_readbytes:
160 ecard_task_readbytes(req);
161 break;
162
163 case req_reset:
164 ecard_task_reset(req);
165 break;
166 }
167}
168
169/*
170 * On 26-bit processors, we don't need the kcardd thread to access the
171 * expansion card loaders. We do it directly.
172 */
173#define ecard_call(req) ecard_do_request(req)
174
175/* ======================= Mid-level card control ===================== */
176
177static void
178ecard_readbytes(void *addr, ecard_t *ec, int off, int len, int useld)
179{
180 struct ecard_request req;
181
182 req.req = req_readbytes;
183 req.ec = ec;
184 req.address = off;
185 req.length = len;
186 req.use_loader = useld;
187 req.buffer = addr;
188
189 ecard_call(&req);
190}
191
192int ecard_readchunk(struct in_chunk_dir *cd, ecard_t *ec, int id, int num)
193{
194 struct ex_chunk_dir excd;
195 int index = 16;
196 int useld = 0;
197
198 if (!ec->cid.cd)
199 return 0;
200
201 while(1) {
202 ecard_readbytes(&excd, ec, index, 8, useld);
203 index += 8;
204 if (c_id(&excd) == 0) {
205 if (!useld && ec->loader) {
206 useld = 1;
207 index = 0;
208 continue;
209 }
210 return 0;
211 }
212 if (c_id(&excd) == 0xf0) { /* link */
213 index = c_start(&excd);
214 continue;
215 }
216 if (c_id(&excd) == 0x80) { /* loader */
217 if (!ec->loader) {
218 ec->loader = kmalloc(c_len(&excd),
219 GFP_KERNEL);
220 if (ec->loader)
221 ecard_readbytes(ec->loader, ec,
222 (int)c_start(&excd),
223 c_len(&excd), useld);
224 else
225 return 0;
226 }
227 continue;
228 }
229 if (c_id(&excd) == id && num-- == 0)
230 break;
231 }
232
233 if (c_id(&excd) & 0x80) {
234 switch (c_id(&excd) & 0x70) {
235 case 0x70:
236 ecard_readbytes((unsigned char *)excd.d.string, ec,
237 (int)c_start(&excd), c_len(&excd),
238 useld);
239 break;
240 case 0x00:
241 break;
242 }
243 }
244 cd->start_offset = c_start(&excd);
245 memcpy(cd->d.string, excd.d.string, 256);
246 return 1;
247}
248
249/* ======================= Interrupt control ============================ */
250
251static void ecard_def_irq_enable(ecard_t *ec, int irqnr)
252{
253}
254
255static void ecard_def_irq_disable(ecard_t *ec, int irqnr)
256{
257}
258
259static int ecard_def_irq_pending(ecard_t *ec)
260{
261 return !ec->irqmask || ec->irqaddr[0] & ec->irqmask;
262}
263
264static void ecard_def_fiq_enable(ecard_t *ec, int fiqnr)
265{
266 panic("ecard_def_fiq_enable called - impossible");
267}
268
269static void ecard_def_fiq_disable(ecard_t *ec, int fiqnr)
270{
271 panic("ecard_def_fiq_disable called - impossible");
272}
273
274static int ecard_def_fiq_pending(ecard_t *ec)
275{
276 return !ec->fiqmask || ec->fiqaddr[0] & ec->fiqmask;
277}
278
279static expansioncard_ops_t ecard_default_ops = {
280 ecard_def_irq_enable,
281 ecard_def_irq_disable,
282 ecard_def_irq_pending,
283 ecard_def_fiq_enable,
284 ecard_def_fiq_disable,
285 ecard_def_fiq_pending
286};
287
288/*
289 * Enable and disable interrupts from expansion cards.
290 * (interrupts are disabled for these functions).
291 *
292 * They are not meant to be called directly, but via enable/disable_irq.
293 */
294static void ecard_irq_unmask(unsigned int irqnr)
295{
296 ecard_t *ec = slot_to_ecard(irqnr - 32);
297
298 if (ec) {
299 if (!ec->ops)
300 ec->ops = &ecard_default_ops;
301
302 if (ec->claimed && ec->ops->irqenable)
303 ec->ops->irqenable(ec, irqnr);
304 else
305 printk(KERN_ERR "ecard: rejecting request to "
306 "enable IRQs for %d\n", irqnr);
307 }
308}
309
310static void ecard_irq_mask(unsigned int irqnr)
311{
312 ecard_t *ec = slot_to_ecard(irqnr - 32);
313
314 if (ec) {
315 if (!ec->ops)
316 ec->ops = &ecard_default_ops;
317
318 if (ec->ops && ec->ops->irqdisable)
319 ec->ops->irqdisable(ec, irqnr);
320 }
321}
322
323static struct irqchip ecard_chip = {
324 .ack = ecard_irq_mask,
325 .mask = ecard_irq_mask,
326 .unmask = ecard_irq_unmask,
327};
328
329void ecard_enablefiq(unsigned int fiqnr)
330{
331 ecard_t *ec = slot_to_ecard(fiqnr);
332
333 if (ec) {
334 if (!ec->ops)
335 ec->ops = &ecard_default_ops;
336
337 if (ec->claimed && ec->ops->fiqenable)
338 ec->ops->fiqenable(ec, fiqnr);
339 else
340 printk(KERN_ERR "ecard: rejecting request to "
341 "enable FIQs for %d\n", fiqnr);
342 }
343}
344
345void ecard_disablefiq(unsigned int fiqnr)
346{
347 ecard_t *ec = slot_to_ecard(fiqnr);
348
349 if (ec) {
350 if (!ec->ops)
351 ec->ops = &ecard_default_ops;
352
353 if (ec->ops->fiqdisable)
354 ec->ops->fiqdisable(ec, fiqnr);
355 }
356}
357
358static void
359ecard_dump_irq_state(ecard_t *ec)
360{
361 printk(" %d: %sclaimed, ",
362 ec->slot_no,
363 ec->claimed ? "" : "not ");
364
365 if (ec->ops && ec->ops->irqpending &&
366 ec->ops != &ecard_default_ops)
367 printk("irq %spending\n",
368 ec->ops->irqpending(ec) ? "" : "not ");
369 else
370 printk("irqaddr %p, mask = %02X, status = %02X\n",
371 ec->irqaddr, ec->irqmask, *ec->irqaddr);
372}
373
374static void ecard_check_lockup(struct irqdesc *desc)
375{
376 static int last, lockup;
377 ecard_t *ec;
378
379 /*
380 * If the timer interrupt has not run since the last million
381 * unrecognised expansion card interrupts, then there is
382 * something seriously wrong. Disable the expansion card
383 * interrupts so at least we can continue.
384 *
385 * Maybe we ought to start a timer to re-enable them some time
386 * later?
387 */
388 if (last == jiffies) {
389 lockup += 1;
390 if (lockup > 1000000) {
391 printk(KERN_ERR "\nInterrupt lockup detected - "
392 "disabling all expansion card interrupts\n");
393
394 desc->chip->mask(IRQ_EXPANSIONCARD);
395
396 printk("Expansion card IRQ state:\n");
397
398 for (ec = cards; ec; ec = ec->next)
399 ecard_dump_irq_state(ec);
400 }
401 } else
402 lockup = 0;
403
404 /*
405 * If we did not recognise the source of this interrupt,
406 * warn the user, but don't flood the user with these messages.
407 */
408 if (!last || time_after(jiffies, (unsigned long)(last + 5*HZ))) {
409 last = jiffies;
410 printk(KERN_WARNING "Unrecognised interrupt from backplane\n");
411 }
412}
413
414static void
415ecard_irq_handler(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs)
416{
417 ecard_t *ec;
418 int called = 0;
419
420 desc->chip->mask(irq);
421 for (ec = cards; ec; ec = ec->next) {
422 int pending;
423
424 if (!ec->claimed || ec->irq == NO_IRQ)
425 continue;
426
427 if (ec->ops && ec->ops->irqpending)
428 pending = ec->ops->irqpending(ec);
429 else
430 pending = ecard_default_ops.irqpending(ec);
431
432 if (pending) {
433 struct irqdesc *d = irq_desc + ec->irq;
434 d->handle(ec->irq, d, regs);
435 called ++;
436 }
437 }
438 desc->chip->unmask(irq);
439
440 if (called == 0)
441 ecard_check_lockup(desc);
442}
443
444#define ecard_irqexp_handler NULL
445#define ecard_probeirqhw() (0)
446
447unsigned int ecard_address(ecard_t *ec, card_type_t type, card_speed_t speed)
448{
449 unsigned long address = 0;
450 int slot = ec->slot_no;
451
452 ectcr &= ~(1 << slot);
453
454 switch (type) {
455 case ECARD_MEMC:
456 address = IO_EC_MEMC_BASE + (slot << 12);
457 break;
458
459 case ECARD_IOC:
460 address = IO_EC_IOC_BASE + (slot << 12) + (speed << 17);
461 break;
462
463 default:
464 break;
465 }
466
467 return address;
468}
469
470static int ecard_prints(char *buffer, ecard_t *ec)
471{
472 char *start = buffer;
473
474 buffer += sprintf(buffer, " %d: ", ec->slot_no);
475
476 if (ec->cid.id == 0) {
477 struct in_chunk_dir incd;
478
479 buffer += sprintf(buffer, "[%04X:%04X] ",
480 ec->cid.manufacturer, ec->cid.product);
481
482 if (!ec->card_desc && ec->cid.cd &&
483 ecard_readchunk(&incd, ec, 0xf5, 0)) {
484 ec->card_desc = kmalloc(strlen(incd.d.string)+1, GFP_KERNEL);
485
486 if (ec->card_desc)
487 strcpy((char *)ec->card_desc, incd.d.string);
488 }
489
490 buffer += sprintf(buffer, "%s\n", ec->card_desc ? ec->card_desc : "*unknown*");
491 } else
492 buffer += sprintf(buffer, "Simple card %d\n", ec->cid.id);
493
494 return buffer - start;
495}
496
497static int get_ecard_dev_info(char *buf, char **start, off_t pos, int count)
498{
499 ecard_t *ec = cards;
500 off_t at = 0;
501 int len, cnt;
502
503 cnt = 0;
504 while (ec && count > cnt) {
505 len = ecard_prints(buf, ec);
506 at += len;
507 if (at >= pos) {
508 if (!*start) {
509 *start = buf + (pos - (at - len));
510 cnt = at - pos;
511 } else
512 cnt += len;
513 buf += len;
514 }
515 ec = ec->next;
516 }
517 return (count > cnt) ? cnt : count;
518}
519
520static struct proc_dir_entry *proc_bus_ecard_dir = NULL;
521
522static void ecard_proc_init(void)
523{
524 proc_bus_ecard_dir = proc_mkdir("ecard", proc_bus);
525 create_proc_info_entry("devices", 0, proc_bus_ecard_dir,
526 get_ecard_dev_info);
527}
528
529#define ec_set_resource(ec,nr,st,sz,flg) \
530 do { \
531 (ec)->resource[nr].name = ec->dev.bus_id; \
532 (ec)->resource[nr].start = st; \
533 (ec)->resource[nr].end = (st) + (sz) - 1; \
534 (ec)->resource[nr].flags = flg; \
535 } while (0)
536
537static void __init ecard_init_resources(struct expansion_card *ec)
538{
539 unsigned long base = PODSLOT_IOC0_BASE;
540 unsigned int slot = ec->slot_no;
541 int i;
542
543 ec_set_resource(ec, ECARD_RES_MEMC,
544 PODSLOT_MEMC_BASE + (slot << 14),
545 PODSLOT_MEMC_SIZE, IORESOURCE_MEM);
546
547 for (i = 0; i < ECARD_RES_IOCSYNC - ECARD_RES_IOCSLOW; i++) {
548 ec_set_resource(ec, i + ECARD_RES_IOCSLOW,
549 base + (slot << 14) + (i << 19),
550 PODSLOT_IOC_SIZE, IORESOURCE_MEM);
551 }
552
553 for (i = 0; i < ECARD_NUM_RESOURCES; i++) {
554 if (ec->resource[i].start &&
555 request_resource(&iomem_resource, &ec->resource[i])) {
556 printk(KERN_ERR "%s: resource(s) not available\n",
557 ec->dev.bus_id);
558 ec->resource[i].end -= ec->resource[i].start;
559 ec->resource[i].start = 0;
560 }
561 }
562}
563
564static ssize_t ecard_show_irq(struct device *dev, struct device_attribute *attr, char *buf)
565{
566 struct expansion_card *ec = ECARD_DEV(dev);
567 return sprintf(buf, "%u\n", ec->irq);
568}
569
570static ssize_t ecard_show_vendor(struct device *dev, struct device_attribute *attr, char *buf)
571{
572 struct expansion_card *ec = ECARD_DEV(dev);
573 return sprintf(buf, "%u\n", ec->cid.manufacturer);
574}
575
576static ssize_t ecard_show_device(struct device *dev, struct device_attribute *attr, char *buf)
577{
578 struct expansion_card *ec = ECARD_DEV(dev);
579 return sprintf(buf, "%u\n", ec->cid.product);
580}
581
582static ssize_t ecard_show_dma(struct device *dev, struct device_attribute *attr, char *buf)
583{
584 struct expansion_card *ec = ECARD_DEV(dev);
585 return sprintf(buf, "%u\n", ec->dma);
586}
587
588static ssize_t ecard_show_resources(struct device *dev, struct device_attribute *attr, char *buf)
589{
590 struct expansion_card *ec = ECARD_DEV(dev);
591 char *str = buf;
592 int i;
593
594 for (i = 0; i < ECARD_NUM_RESOURCES; i++)
595 str += sprintf(str, "%08lx %08lx %08lx\n",
596 ec->resource[i].start,
597 ec->resource[i].end,
598 ec->resource[i].flags);
599
600 return str - buf;
601}
602
603static DEVICE_ATTR(irq, S_IRUGO, ecard_show_irq, NULL);
604static DEVICE_ATTR(vendor, S_IRUGO, ecard_show_vendor, NULL);
605static DEVICE_ATTR(device, S_IRUGO, ecard_show_device, NULL);
606static DEVICE_ATTR(dma, S_IRUGO, ecard_show_dma, NULL);
607static DEVICE_ATTR(resource, S_IRUGO, ecard_show_resources, NULL);
608
609/*
610 * Probe for an expansion card.
611 *
612 * If bit 1 of the first byte of the card is set, then the
613 * card does not exist.
614 */
615static int __init
616ecard_probe(int slot, card_type_t type)
617{
618 ecard_t **ecp;
619 ecard_t *ec;
620 struct ex_ecid cid;
621 int i, rc = -ENOMEM;
622
623 ec = kzalloc(sizeof(ecard_t), GFP_KERNEL);
624 if (!ec)
625 goto nomem;
626
627 ec->slot_no = slot;
628 ec->type = type;
629 ec->irq = NO_IRQ;
630 ec->fiq = NO_IRQ;
631 ec->dma = NO_DMA;
632 ec->card_desc = NULL;
633 ec->ops = &ecard_default_ops;
634
635 rc = -ENODEV;
636 if ((ec->podaddr = ecard_address(ec, type, ECARD_SYNC)) == 0)
637 goto nodev;
638
639 cid.r_zero = 1;
640 ecard_readbytes(&cid, ec, 0, 16, 0);
641 if (cid.r_zero)
642 goto nodev;
643
644 ec->cid.id = cid.r_id;
645 ec->cid.cd = cid.r_cd;
646 ec->cid.is = cid.r_is;
647 ec->cid.w = cid.r_w;
648 ec->cid.manufacturer = ecard_getu16(cid.r_manu);
649 ec->cid.product = ecard_getu16(cid.r_prod);
650 ec->cid.country = cid.r_country;
651 ec->cid.irqmask = cid.r_irqmask;
652 ec->cid.irqoff = ecard_gets24(cid.r_irqoff);
653 ec->cid.fiqmask = cid.r_fiqmask;
654 ec->cid.fiqoff = ecard_gets24(cid.r_fiqoff);
655 ec->fiqaddr =
656 ec->irqaddr = (unsigned char *)ioaddr(ec->podaddr);
657
658 if (ec->cid.is) {
659 ec->irqmask = ec->cid.irqmask;
660 ec->irqaddr += ec->cid.irqoff;
661 ec->fiqmask = ec->cid.fiqmask;
662 ec->fiqaddr += ec->cid.fiqoff;
663 } else {
664 ec->irqmask = 1;
665 ec->fiqmask = 4;
666 }
667
668 for (i = 0; i < ARRAY_SIZE(blacklist); i++)
669 if (blacklist[i].manufacturer == ec->cid.manufacturer &&
670 blacklist[i].product == ec->cid.product) {
671 ec->card_desc = blacklist[i].type;
672 break;
673 }
674
675 snprintf(ec->dev.bus_id, sizeof(ec->dev.bus_id), "ecard%d", slot);
676 ec->dev.parent = NULL;
677 ec->dev.bus = &ecard_bus_type;
678 ec->dev.dma_mask = &ec->dma_mask;
679 ec->dma_mask = (u64)0xffffffff;
680
681 ecard_init_resources(ec);
682
683 /*
684 * hook the interrupt handlers
685 */
686 ec->irq = 32 + slot;
687 set_irq_chip(ec->irq, &ecard_chip);
688 set_irq_handler(ec->irq, do_level_IRQ);
689 set_irq_flags(ec->irq, IRQF_VALID);
690
691 for (ecp = &cards; *ecp; ecp = &(*ecp)->next);
692
693 *ecp = ec;
694 slot_to_expcard[slot] = ec;
695
696 device_register(&ec->dev);
697 device_create_file(&ec->dev, &dev_attr_dma);
698 device_create_file(&ec->dev, &dev_attr_irq);
699 device_create_file(&ec->dev, &dev_attr_resource);
700 device_create_file(&ec->dev, &dev_attr_vendor);
701 device_create_file(&ec->dev, &dev_attr_device);
702
703 return 0;
704
705nodev:
706 kfree(ec);
707nomem:
708 return rc;
709}
710
711/*
712 * Initialise the expansion card system.
713 * Locate all hardware - interrupt management and
714 * actual cards.
715 */
716static int __init ecard_init(void)
717{
718 int slot, irqhw;
719
720 printk("Probing expansion cards\n");
721
722 for (slot = 0; slot < MAX_ECARDS; slot ++) {
723 ecard_probe(slot, ECARD_IOC);
724 }
725
726 irqhw = ecard_probeirqhw();
727
728 set_irq_chained_handler(IRQ_EXPANSIONCARD,
729 irqhw ? ecard_irqexp_handler : ecard_irq_handler);
730
731 ecard_proc_init();
732
733 return 0;
734}
735
736subsys_initcall(ecard_init);
737
738/*
739 * ECARD "bus"
740 */
741static const struct ecard_id *
742ecard_match_device(const struct ecard_id *ids, struct expansion_card *ec)
743{
744 int i;
745
746 for (i = 0; ids[i].manufacturer != 65535; i++)
747 if (ec->cid.manufacturer == ids[i].manufacturer &&
748 ec->cid.product == ids[i].product)
749 return ids + i;
750
751 return NULL;
752}
753
754static int ecard_drv_probe(struct device *dev)
755{
756 struct expansion_card *ec = ECARD_DEV(dev);
757 struct ecard_driver *drv = ECARD_DRV(dev->driver);
758 const struct ecard_id *id;
759 int ret;
760
761 id = ecard_match_device(drv->id_table, ec);
762
763 ecard_claim(ec);
764 ret = drv->probe(ec, id);
765 if (ret)
766 ecard_release(ec);
767 return ret;
768}
769
770static int ecard_drv_remove(struct device *dev)
771{
772 struct expansion_card *ec = ECARD_DEV(dev);
773 struct ecard_driver *drv = ECARD_DRV(dev->driver);
774
775 drv->remove(ec);
776 ecard_release(ec);
777
778 return 0;
779}
780
781/*
782 * Before rebooting, we must make sure that the expansion card is in a
783 * sensible state, so it can be re-detected. This means that the first
784 * page of the ROM must be visible. We call the expansion cards reset
785 * handler, if any.
786 */
787static void ecard_drv_shutdown(struct device *dev)
788{
789 struct expansion_card *ec = ECARD_DEV(dev);
790 struct ecard_driver *drv = ECARD_DRV(dev->driver);
791 struct ecard_request req;
792
793 if (drv->shutdown)
794 drv->shutdown(ec);
795 ecard_release(ec);
796 req.req = req_reset;
797 req.ec = ec;
798 ecard_call(&req);
799}
800
801int ecard_register_driver(struct ecard_driver *drv)
802{
803 drv->drv.bus = &ecard_bus_type;
804 drv->drv.probe = ecard_drv_probe;
805 drv->drv.remove = ecard_drv_remove;
806 drv->drv.shutdown = ecard_drv_shutdown;
807
808 return driver_register(&drv->drv);
809}
810
811void ecard_remove_driver(struct ecard_driver *drv)
812{
813 driver_unregister(&drv->drv);
814}
815
816static int ecard_match(struct device *_dev, struct device_driver *_drv)
817{
818 struct expansion_card *ec = ECARD_DEV(_dev);
819 struct ecard_driver *drv = ECARD_DRV(_drv);
820 int ret;
821
822 if (drv->id_table) {
823 ret = ecard_match_device(drv->id_table, ec) != NULL;
824 } else {
825 ret = ec->cid.id == drv->id;
826 }
827
828 return ret;
829}
830
831struct bus_type ecard_bus_type = {
832 .name = "ecard",
833 .match = ecard_match,
834};
835
836static int ecard_bus_init(void)
837{
838 return bus_register(&ecard_bus_type);
839}
840
841postcore_initcall(ecard_bus_init);
842
843EXPORT_SYMBOL(ecard_readchunk);
844EXPORT_SYMBOL(ecard_address);
845EXPORT_SYMBOL(ecard_register_driver);
846EXPORT_SYMBOL(ecard_remove_driver);
847EXPORT_SYMBOL(ecard_bus_type);
generated by cgit v1.2.2 (git 2.25.0) at 2025-01-04 09:07:59 -0500