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pcmcia: use struct resource for PCMCIA devices, part 2
[deliverable/linux.git] / drivers / pcmcia / ds.c
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CommitLineData
1/*
2 * ds.c -- 16-bit PCMCIA core support
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
7 *
8 * The initial developer of the original code is David A. Hinds
9 * <dahinds@users.sourceforge.net>. Portions created by David A. Hinds
10 * are Copyright (C) 1999 David A. Hinds. All Rights Reserved.
11 *
12 * (C) 1999 David A. Hinds
13 * (C) 2003 - 2010 Dominik Brodowski
14 */
15
16#include <linux/kernel.h>
17#include <linux/module.h>
18#include <linux/init.h>
19#include <linux/errno.h>
20#include <linux/list.h>
21#include <linux/delay.h>
22#include <linux/workqueue.h>
23#include <linux/crc32.h>
24#include <linux/firmware.h>
25#include <linux/kref.h>
26#include <linux/dma-mapping.h>
27#include <linux/slab.h>
28
29#include <pcmcia/cs.h>
30#include <pcmcia/cistpl.h>
31#include <pcmcia/ds.h>
32#include <pcmcia/ss.h>
33
34#include "cs_internal.h"
35
36/*====================================================================*/
37
38/* Module parameters */
39
40MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
41MODULE_DESCRIPTION("PCMCIA Driver Services");
42MODULE_LICENSE("GPL");
43
44
45/*====================================================================*/
46
47static void pcmcia_check_driver(struct pcmcia_driver *p_drv)
48{
49 struct pcmcia_device_id *did = p_drv->id_table;
50 unsigned int i;
51 u32 hash;
52
53 if (!p_drv->probe || !p_drv->remove)
54 printk(KERN_DEBUG "pcmcia: %s lacks a requisite callback "
55 "function\n", p_drv->drv.name);
56
57 while (did && did->match_flags) {
58 for (i = 0; i < 4; i++) {
59 if (!did->prod_id[i])
60 continue;
61
62 hash = crc32(0, did->prod_id[i], strlen(did->prod_id[i]));
63 if (hash == did->prod_id_hash[i])
64 continue;
65
66 printk(KERN_DEBUG "pcmcia: %s: invalid hash for "
67 "product string \"%s\": is 0x%x, should "
68 "be 0x%x\n", p_drv->drv.name, did->prod_id[i],
69 did->prod_id_hash[i], hash);
70 printk(KERN_DEBUG "pcmcia: see "
71 "Documentation/pcmcia/devicetable.txt for "
72 "details\n");
73 }
74 did++;
75 }
76
77 return;
78}
79
80
81/*======================================================================*/
82
83
84struct pcmcia_dynid {
85 struct list_head node;
86 struct pcmcia_device_id id;
87};
88
89/**
90 * pcmcia_store_new_id - add a new PCMCIA device ID to this driver and re-probe devices
91 * @driver: target device driver
92 * @buf: buffer for scanning device ID data
93 * @count: input size
94 *
95 * Adds a new dynamic PCMCIA device ID to this driver,
96 * and causes the driver to probe for all devices again.
97 */
98static ssize_t
99pcmcia_store_new_id(struct device_driver *driver, const char *buf, size_t count)
100{
101 struct pcmcia_dynid *dynid;
102 struct pcmcia_driver *pdrv = to_pcmcia_drv(driver);
103 __u16 match_flags, manf_id, card_id;
104 __u8 func_id, function, device_no;
105 __u32 prod_id_hash[4] = {0, 0, 0, 0};
106 int fields = 0;
107 int retval = 0;
108
109 fields = sscanf(buf, "%hx %hx %hx %hhx %hhx %hhx %x %x %x %x",
110 &match_flags, &manf_id, &card_id, &func_id, &function, &device_no,
111 &prod_id_hash[0], &prod_id_hash[1], &prod_id_hash[2], &prod_id_hash[3]);
112 if (fields < 6)
113 return -EINVAL;
114
115 dynid = kzalloc(sizeof(struct pcmcia_dynid), GFP_KERNEL);
116 if (!dynid)
117 return -ENOMEM;
118
119 dynid->id.match_flags = match_flags;
120 dynid->id.manf_id = manf_id;
121 dynid->id.card_id = card_id;
122 dynid->id.func_id = func_id;
123 dynid->id.function = function;
124 dynid->id.device_no = device_no;
125 memcpy(dynid->id.prod_id_hash, prod_id_hash, sizeof(__u32) * 4);
126
127 mutex_lock(&pdrv->dynids.lock);
128 list_add_tail(&dynid->node, &pdrv->dynids.list);
129 mutex_unlock(&pdrv->dynids.lock);
130
131 if (get_driver(&pdrv->drv)) {
132 retval = driver_attach(&pdrv->drv);
133 put_driver(&pdrv->drv);
134 }
135
136 if (retval)
137 return retval;
138 return count;
139}
140static DRIVER_ATTR(new_id, S_IWUSR, NULL, pcmcia_store_new_id);
141
142static void
143pcmcia_free_dynids(struct pcmcia_driver *drv)
144{
145 struct pcmcia_dynid *dynid, *n;
146
147 mutex_lock(&drv->dynids.lock);
148 list_for_each_entry_safe(dynid, n, &drv->dynids.list, node) {
149 list_del(&dynid->node);
150 kfree(dynid);
151 }
152 mutex_unlock(&drv->dynids.lock);
153}
154
155static int
156pcmcia_create_newid_file(struct pcmcia_driver *drv)
157{
158 int error = 0;
159 if (drv->probe != NULL)
160 error = driver_create_file(&drv->drv, &driver_attr_new_id);
161 return error;
162}
163
164
165/**
166 * pcmcia_register_driver - register a PCMCIA driver with the bus core
167 * @driver: the &driver being registered
168 *
169 * Registers a PCMCIA driver with the PCMCIA bus core.
170 */
171int pcmcia_register_driver(struct pcmcia_driver *driver)
172{
173 int error;
174
175 if (!driver)
176 return -EINVAL;
177
178 pcmcia_check_driver(driver);
179
180 /* initialize common fields */
181 driver->drv.bus = &pcmcia_bus_type;
182 driver->drv.owner = driver->owner;
183 mutex_init(&driver->dynids.lock);
184 INIT_LIST_HEAD(&driver->dynids.list);
185
186 pr_debug("registering driver %s\n", driver->drv.name);
187
188 error = driver_register(&driver->drv);
189 if (error < 0)
190 return error;
191
192 error = pcmcia_create_newid_file(driver);
193 if (error)
194 driver_unregister(&driver->drv);
195
196 return error;
197}
198EXPORT_SYMBOL(pcmcia_register_driver);
199
200/**
201 * pcmcia_unregister_driver - unregister a PCMCIA driver with the bus core
202 * @driver: the &driver being unregistered
203 */
204void pcmcia_unregister_driver(struct pcmcia_driver *driver)
205{
206 pr_debug("unregistering driver %s\n", driver->drv.name);
207 driver_unregister(&driver->drv);
208 pcmcia_free_dynids(driver);
209}
210EXPORT_SYMBOL(pcmcia_unregister_driver);
211
212
213/* pcmcia_device handling */
214
215static struct pcmcia_device *pcmcia_get_dev(struct pcmcia_device *p_dev)
216{
217 struct device *tmp_dev;
218 tmp_dev = get_device(&p_dev->dev);
219 if (!tmp_dev)
220 return NULL;
221 return to_pcmcia_dev(tmp_dev);
222}
223
224static void pcmcia_put_dev(struct pcmcia_device *p_dev)
225{
226 if (p_dev)
227 put_device(&p_dev->dev);
228}
229
230static void pcmcia_release_function(struct kref *ref)
231{
232 struct config_t *c = container_of(ref, struct config_t, ref);
233 pr_debug("releasing config_t\n");
234 kfree(c);
235}
236
237static void pcmcia_release_dev(struct device *dev)
238{
239 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
240 int i;
241 dev_dbg(dev, "releasing device\n");
242 pcmcia_put_socket(p_dev->socket);
243 for (i = 0; i < 4; i++)
244 kfree(p_dev->prod_id[i]);
245 kfree(p_dev->devname);
246 kref_put(&p_dev->function_config->ref, pcmcia_release_function);
247 kfree(p_dev);
248}
249
250
251static int pcmcia_device_probe(struct device *dev)
252{
253 struct pcmcia_device *p_dev;
254 struct pcmcia_driver *p_drv;
255 struct pcmcia_socket *s;
256 cistpl_config_t cis_config;
257 int ret = 0;
258
259 dev = get_device(dev);
260 if (!dev)
261 return -ENODEV;
262
263 p_dev = to_pcmcia_dev(dev);
264 p_drv = to_pcmcia_drv(dev->driver);
265 s = p_dev->socket;
266
267 dev_dbg(dev, "trying to bind to %s\n", p_drv->drv.name);
268
269 if ((!p_drv->probe) || (!p_dev->function_config) ||
270 (!try_module_get(p_drv->owner))) {
271 ret = -EINVAL;
272 goto put_dev;
273 }
274
275 /* set up some more device information */
276 ret = pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_CONFIG,
277 &cis_config);
278 if (!ret) {
279 p_dev->conf.ConfigBase = cis_config.base;
280 p_dev->conf.Present = cis_config.rmask[0];
281 } else {
282 dev_printk(KERN_INFO, dev,
283 "pcmcia: could not parse base and rmask0 of CIS\n");
284 p_dev->conf.ConfigBase = 0;
285 p_dev->conf.Present = 0;
286 }
287
288 ret = p_drv->probe(p_dev);
289 if (ret) {
290 dev_dbg(dev, "binding to %s failed with %d\n",
291 p_drv->drv.name, ret);
292 goto put_module;
293 }
294
295 mutex_lock(&s->ops_mutex);
296 if ((s->pcmcia_pfc) &&
297 (p_dev->socket->device_count == 1) && (p_dev->device_no == 0))
298 pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY);
299 mutex_unlock(&s->ops_mutex);
300
301put_module:
302 if (ret)
303 module_put(p_drv->owner);
304put_dev:
305 if (ret)
306 put_device(dev);
307 return ret;
308}
309
310
311/*
312 * Removes a PCMCIA card from the device tree and socket list.
313 */
314static void pcmcia_card_remove(struct pcmcia_socket *s, struct pcmcia_device *leftover)
315{
316 struct pcmcia_device *p_dev;
317 struct pcmcia_device *tmp;
318
319 dev_dbg(leftover ? &leftover->dev : &s->dev,
320 "pcmcia_card_remove(%d) %s\n", s->sock,
321 leftover ? leftover->devname : "");
322
323 mutex_lock(&s->ops_mutex);
324 if (!leftover)
325 s->device_count = 0;
326 else
327 s->device_count = 1;
328 mutex_unlock(&s->ops_mutex);
329
330 /* unregister all pcmcia_devices registered with this socket, except leftover */
331 list_for_each_entry_safe(p_dev, tmp, &s->devices_list, socket_device_list) {
332 if (p_dev == leftover)
333 continue;
334
335 mutex_lock(&s->ops_mutex);
336 list_del(&p_dev->socket_device_list);
337 mutex_unlock(&s->ops_mutex);
338
339 dev_dbg(&p_dev->dev, "unregistering device\n");
340 device_unregister(&p_dev->dev);
341 }
342
343 return;
344}
345
346static int pcmcia_device_remove(struct device *dev)
347{
348 struct pcmcia_device *p_dev;
349 struct pcmcia_driver *p_drv;
350 int i;
351
352 p_dev = to_pcmcia_dev(dev);
353 p_drv = to_pcmcia_drv(dev->driver);
354
355 dev_dbg(dev, "removing device\n");
356
357 /* If we're removing the primary module driving a
358 * pseudo multi-function card, we need to unbind
359 * all devices
360 */
361 if ((p_dev->socket->pcmcia_pfc) &&
362 (p_dev->socket->device_count > 0) &&
363 (p_dev->device_no == 0))
364 pcmcia_card_remove(p_dev->socket, p_dev);
365
366 /* detach the "instance" */
367 if (!p_drv)
368 return 0;
369
370 if (p_drv->remove)
371 p_drv->remove(p_dev);
372
373 /* check for proper unloading */
374 if (p_dev->_irq || p_dev->_io || p_dev->_locked)
375 dev_printk(KERN_INFO, dev,
376 "pcmcia: driver %s did not release config properly\n",
377 p_drv->drv.name);
378
379 for (i = 0; i < MAX_WIN; i++)
380 if (p_dev->_win & CLIENT_WIN_REQ(i))
381 dev_printk(KERN_INFO, dev,
382 "pcmcia: driver %s did not release window properly\n",
383 p_drv->drv.name);
384
385 /* references from pcmcia_probe_device */
386 pcmcia_put_dev(p_dev);
387 module_put(p_drv->owner);
388
389 return 0;
390}
391
392
393/*
394 * pcmcia_device_query -- determine information about a pcmcia device
395 */
396static int pcmcia_device_query(struct pcmcia_device *p_dev)
397{
398 cistpl_manfid_t manf_id;
399 cistpl_funcid_t func_id;
400 cistpl_vers_1_t *vers1;
401 unsigned int i;
402
403 vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL);
404 if (!vers1)
405 return -ENOMEM;
406
407 if (!pccard_read_tuple(p_dev->socket, BIND_FN_ALL,
408 CISTPL_MANFID, &manf_id)) {
409 mutex_lock(&p_dev->socket->ops_mutex);
410 p_dev->manf_id = manf_id.manf;
411 p_dev->card_id = manf_id.card;
412 p_dev->has_manf_id = 1;
413 p_dev->has_card_id = 1;
414 mutex_unlock(&p_dev->socket->ops_mutex);
415 }
416
417 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
418 CISTPL_FUNCID, &func_id)) {
419 mutex_lock(&p_dev->socket->ops_mutex);
420 p_dev->func_id = func_id.func;
421 p_dev->has_func_id = 1;
422 mutex_unlock(&p_dev->socket->ops_mutex);
423 } else {
424 /* rule of thumb: cards with no FUNCID, but with
425 * common memory device geometry information, are
426 * probably memory cards (from pcmcia-cs) */
427 cistpl_device_geo_t *devgeo;
428
429 devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL);
430 if (!devgeo) {
431 kfree(vers1);
432 return -ENOMEM;
433 }
434 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
435 CISTPL_DEVICE_GEO, devgeo)) {
436 dev_dbg(&p_dev->dev,
437 "mem device geometry probably means "
438 "FUNCID_MEMORY\n");
439 mutex_lock(&p_dev->socket->ops_mutex);
440 p_dev->func_id = CISTPL_FUNCID_MEMORY;
441 p_dev->has_func_id = 1;
442 mutex_unlock(&p_dev->socket->ops_mutex);
443 }
444 kfree(devgeo);
445 }
446
447 if (!pccard_read_tuple(p_dev->socket, BIND_FN_ALL, CISTPL_VERS_1,
448 vers1)) {
449 mutex_lock(&p_dev->socket->ops_mutex);
450 for (i = 0; i < min_t(unsigned int, 4, vers1->ns); i++) {
451 char *tmp;
452 unsigned int length;
453 char *new;
454
455 tmp = vers1->str + vers1->ofs[i];
456
457 length = strlen(tmp) + 1;
458 if ((length < 2) || (length > 255))
459 continue;
460
461 new = kmalloc(sizeof(char) * length, GFP_KERNEL);
462 if (!new)
463 continue;
464
465 new = strncpy(new, tmp, length);
466
467 tmp = p_dev->prod_id[i];
468 p_dev->prod_id[i] = new;
469 kfree(tmp);
470 }
471 mutex_unlock(&p_dev->socket->ops_mutex);
472 }
473
474 kfree(vers1);
475 return 0;
476}
477
478
479static struct pcmcia_device *pcmcia_device_add(struct pcmcia_socket *s,
480 unsigned int function)
481{
482 struct pcmcia_device *p_dev, *tmp_dev;
483 int i;
484
485 s = pcmcia_get_socket(s);
486 if (!s)
487 return NULL;
488
489 pr_debug("adding device to %d, function %d\n", s->sock, function);
490
491 p_dev = kzalloc(sizeof(struct pcmcia_device), GFP_KERNEL);
492 if (!p_dev)
493 goto err_put;
494
495 mutex_lock(&s->ops_mutex);
496 p_dev->device_no = (s->device_count++);
497 mutex_unlock(&s->ops_mutex);
498
499 /* max of 2 PFC devices */
500 if ((p_dev->device_no >= 2) && (function == 0))
501 goto err_free;
502
503 /* max of 4 devices overall */
504 if (p_dev->device_no >= 4)
505 goto err_free;
506
507 p_dev->socket = s;
508 p_dev->func = function;
509
510 p_dev->dev.bus = &pcmcia_bus_type;
511 p_dev->dev.parent = s->dev.parent;
512 p_dev->dev.release = pcmcia_release_dev;
513 /* by default don't allow DMA */
514 p_dev->dma_mask = DMA_MASK_NONE;
515 p_dev->dev.dma_mask = &p_dev->dma_mask;
516 dev_set_name(&p_dev->dev, "%d.%d", p_dev->socket->sock, p_dev->device_no);
517 if (!dev_name(&p_dev->dev))
518 goto err_free;
519 p_dev->devname = kasprintf(GFP_KERNEL, "pcmcia%s", dev_name(&p_dev->dev));
520 if (!p_dev->devname)
521 goto err_free;
522 dev_dbg(&p_dev->dev, "devname is %s\n", p_dev->devname);
523
524 mutex_lock(&s->ops_mutex);
525
526 /*
527 * p_dev->function_config must be the same for all card functions.
528 * Note that this is serialized by ops_mutex, so that only one
529 * such struct will be created.
530 */
531 list_for_each_entry(tmp_dev, &s->devices_list, socket_device_list)
532 if (p_dev->func == tmp_dev->func) {
533 p_dev->function_config = tmp_dev->function_config;
534 p_dev->irq = tmp_dev->irq;
535 kref_get(&p_dev->function_config->ref);
536 }
537
538 /* Add to the list in pcmcia_bus_socket */
539 list_add(&p_dev->socket_device_list, &s->devices_list);
540
541 if (pcmcia_setup_irq(p_dev))
542 dev_warn(&p_dev->dev,
543 "IRQ setup failed -- device might not work\n");
544
545 if (!p_dev->function_config) {
546 config_t *c;
547 dev_dbg(&p_dev->dev, "creating config_t\n");
548 c = kzalloc(sizeof(struct config_t), GFP_KERNEL);
549 if (!c) {
550 mutex_unlock(&s->ops_mutex);
551 goto err_unreg;
552 }
553 p_dev->function_config = c;
554 kref_init(&c->ref);
555 for (i = 0; i < MAX_IO_WIN; i++) {
556 c->io[i].name = dev_name(&p_dev->dev);
557 c->io[i].flags = IORESOURCE_IO;
558 }
559 for (i = 0; i< MAX_WIN; i++) {
560 c->mem[i].name = dev_name(&p_dev->dev);
561 c->mem[i].flags = IORESOURCE_MEM;
562 }
563 }
564 for (i = 0; i < MAX_IO_WIN; i++)
565 p_dev->resource[i] = &p_dev->function_config->io[i];
566 for (; i < (MAX_IO_WIN + MAX_WIN); i++)
567 p_dev->resource[i] = &p_dev->function_config->mem[i-MAX_IO_WIN];
568
569 mutex_unlock(&s->ops_mutex);
570
571 dev_printk(KERN_NOTICE, &p_dev->dev,
572 "pcmcia: registering new device %s (IRQ: %d)\n",
573 p_dev->devname, p_dev->irq);
574
575 pcmcia_device_query(p_dev);
576
577 if (device_register(&p_dev->dev))
578 goto err_unreg;
579
580 return p_dev;
581
582 err_unreg:
583 mutex_lock(&s->ops_mutex);
584 list_del(&p_dev->socket_device_list);
585 mutex_unlock(&s->ops_mutex);
586
587 err_free:
588 mutex_lock(&s->ops_mutex);
589 s->device_count--;
590 mutex_unlock(&s->ops_mutex);
591
592 for (i = 0; i < 4; i++)
593 kfree(p_dev->prod_id[i]);
594 kfree(p_dev->devname);
595 kfree(p_dev);
596 err_put:
597 pcmcia_put_socket(s);
598
599 return NULL;
600}
601
602
603static int pcmcia_card_add(struct pcmcia_socket *s)
604{
605 cistpl_longlink_mfc_t mfc;
606 unsigned int no_funcs, i, no_chains;
607 int ret = -EAGAIN;
608
609 mutex_lock(&s->ops_mutex);
610 if (!(s->resource_setup_done)) {
611 dev_dbg(&s->dev,
612 "no resources available, delaying card_add\n");
613 mutex_unlock(&s->ops_mutex);
614 return -EAGAIN; /* try again, but later... */
615 }
616
617 if (pcmcia_validate_mem(s)) {
618 dev_dbg(&s->dev, "validating mem resources failed, "
619 "delaying card_add\n");
620 mutex_unlock(&s->ops_mutex);
621 return -EAGAIN; /* try again, but later... */
622 }
623 mutex_unlock(&s->ops_mutex);
624
625 ret = pccard_validate_cis(s, &no_chains);
626 if (ret || !no_chains) {
627 dev_dbg(&s->dev, "invalid CIS or invalid resources\n");
628 return -ENODEV;
629 }
630
631 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
632 no_funcs = mfc.nfn;
633 else
634 no_funcs = 1;
635 s->functions = no_funcs;
636
637 for (i = 0; i < no_funcs; i++)
638 pcmcia_device_add(s, i);
639
640 return ret;
641}
642
643
644static int pcmcia_requery_callback(struct device *dev, void * _data)
645{
646 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
647 if (!p_dev->dev.driver) {
648 dev_dbg(dev, "update device information\n");
649 pcmcia_device_query(p_dev);
650 }
651
652 return 0;
653}
654
655
656static void pcmcia_requery(struct pcmcia_socket *s)
657{
658 int has_pfc;
659
660 if (s->functions == 0) {
661 pcmcia_card_add(s);
662 return;
663 }
664
665 /* some device information might have changed because of a CIS
666 * update or because we can finally read it correctly... so
667 * determine it again, overwriting old values if necessary. */
668 bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery_callback);
669
670 /* if the CIS changed, we need to check whether the number of
671 * functions changed. */
672 if (s->fake_cis) {
673 int old_funcs, new_funcs;
674 cistpl_longlink_mfc_t mfc;
675
676 /* does this cis override add or remove functions? */
677 old_funcs = s->functions;
678
679 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC,
680 &mfc))
681 new_funcs = mfc.nfn;
682 else
683 new_funcs = 1;
684 if (old_funcs != new_funcs) {
685 /* we need to re-start */
686 pcmcia_card_remove(s, NULL);
687 s->functions = 0;
688 pcmcia_card_add(s);
689 }
690 }
691
692 /* If the PCMCIA device consists of two pseudo devices,
693 * call pcmcia_device_add() -- which will fail if both
694 * devices are already registered. */
695 mutex_lock(&s->ops_mutex);
696 has_pfc = s->pcmcia_pfc;
697 mutex_unlock(&s->ops_mutex);
698 if (has_pfc)
699 pcmcia_device_add(s, 0);
700
701 /* we re-scan all devices, not just the ones connected to this
702 * socket. This does not matter, though. */
703 if (bus_rescan_devices(&pcmcia_bus_type))
704 dev_warn(&s->dev, "rescanning the bus failed\n");
705}
706
707
708#ifdef CONFIG_PCMCIA_LOAD_CIS
709
710/**
711 * pcmcia_load_firmware - load CIS from userspace if device-provided is broken
712 * @dev: the pcmcia device which needs a CIS override
713 * @filename: requested filename in /lib/firmware/
714 *
715 * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if
716 * the one provided by the card is broken. The firmware files reside in
717 * /lib/firmware/ in userspace.
718 */
719static int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
720{
721 struct pcmcia_socket *s = dev->socket;
722 const struct firmware *fw;
723 int ret = -ENOMEM;
724 cistpl_longlink_mfc_t mfc;
725 int old_funcs, new_funcs = 1;
726
727 if (!filename)
728 return -EINVAL;
729
730 dev_dbg(&dev->dev, "trying to load CIS file %s\n", filename);
731
732 if (request_firmware(&fw, filename, &dev->dev) == 0) {
733 if (fw->size >= CISTPL_MAX_CIS_SIZE) {
734 ret = -EINVAL;
735 dev_printk(KERN_ERR, &dev->dev,
736 "pcmcia: CIS override is too big\n");
737 goto release;
738 }
739
740 if (!pcmcia_replace_cis(s, fw->data, fw->size))
741 ret = 0;
742 else {
743 dev_printk(KERN_ERR, &dev->dev,
744 "pcmcia: CIS override failed\n");
745 goto release;
746 }
747
748 /* we need to re-start if the number of functions changed */
749 old_funcs = s->functions;
750 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC,
751 &mfc))
752 new_funcs = mfc.nfn;
753
754 if (old_funcs != new_funcs)
755 ret = -EBUSY;
756
757 /* update information */
758 pcmcia_device_query(dev);
759
760 /* requery (as number of functions might have changed) */
761 pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY);
762 }
763 release:
764 release_firmware(fw);
765
766 return ret;
767}
768
769#else /* !CONFIG_PCMCIA_LOAD_CIS */
770
771static inline int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
772{
773 return -ENODEV;
774}
775
776#endif
777
778
779static inline int pcmcia_devmatch(struct pcmcia_device *dev,
780 struct pcmcia_device_id *did)
781{
782 if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
783 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
784 return 0;
785 }
786
787 if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
788 if ((!dev->has_card_id) || (dev->card_id != did->card_id))
789 return 0;
790 }
791
792 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
793 if (dev->func != did->function)
794 return 0;
795 }
796
797 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
798 if (!dev->prod_id[0])
799 return 0;
800 if (strcmp(did->prod_id[0], dev->prod_id[0]))
801 return 0;
802 }
803
804 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
805 if (!dev->prod_id[1])
806 return 0;
807 if (strcmp(did->prod_id[1], dev->prod_id[1]))
808 return 0;
809 }
810
811 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
812 if (!dev->prod_id[2])
813 return 0;
814 if (strcmp(did->prod_id[2], dev->prod_id[2]))
815 return 0;
816 }
817
818 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
819 if (!dev->prod_id[3])
820 return 0;
821 if (strcmp(did->prod_id[3], dev->prod_id[3]))
822 return 0;
823 }
824
825 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
826 dev_dbg(&dev->dev, "this is a pseudo-multi-function device\n");
827 mutex_lock(&dev->socket->ops_mutex);
828 dev->socket->pcmcia_pfc = 1;
829 mutex_unlock(&dev->socket->ops_mutex);
830 if (dev->device_no != did->device_no)
831 return 0;
832 }
833
834 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
835 int ret;
836
837 if ((!dev->has_func_id) || (dev->func_id != did->func_id))
838 return 0;
839
840 /* if this is a pseudo-multi-function device,
841 * we need explicit matches */
842 if (dev->socket->pcmcia_pfc)
843 return 0;
844 if (dev->device_no)
845 return 0;
846
847 /* also, FUNC_ID matching needs to be activated by userspace
848 * after it has re-checked that there is no possible module
849 * with a prod_id/manf_id/card_id match.
850 */
851 mutex_lock(&dev->socket->ops_mutex);
852 ret = dev->allow_func_id_match;
853 mutex_unlock(&dev->socket->ops_mutex);
854
855 if (!ret) {
856 dev_dbg(&dev->dev,
857 "skipping FUNC_ID match until userspace ACK\n");
858 return 0;
859 }
860 }
861
862 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
863 dev_dbg(&dev->dev, "device needs a fake CIS\n");
864 if (!dev->socket->fake_cis)
865 if (pcmcia_load_firmware(dev, did->cisfile))
866 return 0;
867 }
868
869 if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
870 int i;
871 for (i = 0; i < 4; i++)
872 if (dev->prod_id[i])
873 return 0;
874 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
875 return 0;
876 }
877
878 return 1;
879}
880
881
882static int pcmcia_bus_match(struct device *dev, struct device_driver *drv)
883{
884 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
885 struct pcmcia_driver *p_drv = to_pcmcia_drv(drv);
886 struct pcmcia_device_id *did = p_drv->id_table;
887 struct pcmcia_dynid *dynid;
888
889 /* match dynamic devices first */
890 mutex_lock(&p_drv->dynids.lock);
891 list_for_each_entry(dynid, &p_drv->dynids.list, node) {
892 dev_dbg(dev, "trying to match to %s\n", drv->name);
893 if (pcmcia_devmatch(p_dev, &dynid->id)) {
894 dev_dbg(dev, "matched to %s\n", drv->name);
895 mutex_unlock(&p_drv->dynids.lock);
896 return 1;
897 }
898 }
899 mutex_unlock(&p_drv->dynids.lock);
900
901 while (did && did->match_flags) {
902 dev_dbg(dev, "trying to match to %s\n", drv->name);
903 if (pcmcia_devmatch(p_dev, did)) {
904 dev_dbg(dev, "matched to %s\n", drv->name);
905 return 1;
906 }
907 did++;
908 }
909
910 return 0;
911}
912
913#ifdef CONFIG_HOTPLUG
914
915static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
916{
917 struct pcmcia_device *p_dev;
918 int i;
919 u32 hash[4] = { 0, 0, 0, 0};
920
921 if (!dev)
922 return -ENODEV;
923
924 p_dev = to_pcmcia_dev(dev);
925
926 /* calculate hashes */
927 for (i = 0; i < 4; i++) {
928 if (!p_dev->prod_id[i])
929 continue;
930 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
931 }
932
933 if (add_uevent_var(env, "SOCKET_NO=%u", p_dev->socket->sock))
934 return -ENOMEM;
935
936 if (add_uevent_var(env, "DEVICE_NO=%02X", p_dev->device_no))
937 return -ENOMEM;
938
939 if (add_uevent_var(env, "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
940 "pa%08Xpb%08Xpc%08Xpd%08X",
941 p_dev->has_manf_id ? p_dev->manf_id : 0,
942 p_dev->has_card_id ? p_dev->card_id : 0,
943 p_dev->has_func_id ? p_dev->func_id : 0,
944 p_dev->func,
945 p_dev->device_no,
946 hash[0],
947 hash[1],
948 hash[2],
949 hash[3]))
950 return -ENOMEM;
951
952 return 0;
953}
954
955#else
956
957static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
958{
959 return -ENODEV;
960}
961
962#endif
963
964/************************ runtime PM support ***************************/
965
966static int pcmcia_dev_suspend(struct device *dev, pm_message_t state);
967static int pcmcia_dev_resume(struct device *dev);
968
969static int runtime_suspend(struct device *dev)
970{
971 int rc;
972
973 device_lock(dev);
974 rc = pcmcia_dev_suspend(dev, PMSG_SUSPEND);
975 device_unlock(dev);
976 return rc;
977}
978
979static int runtime_resume(struct device *dev)
980{
981 int rc;
982
983 device_lock(dev);
984 rc = pcmcia_dev_resume(dev);
985 device_unlock(dev);
986 return rc;
987}
988
989/************************ per-device sysfs output ***************************/
990
991#define pcmcia_device_attr(field, test, format) \
992static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf) \
993{ \
994 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
995 return p_dev->test ? sprintf(buf, format, p_dev->field) : -ENODEV; \
996}
997
998#define pcmcia_device_stringattr(name, field) \
999static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf) \
1000{ \
1001 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
1002 return p_dev->field ? sprintf(buf, "%s\n", p_dev->field) : -ENODEV; \
1003}
1004
1005pcmcia_device_attr(func, socket, "0x%02x\n");
1006pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
1007pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
1008pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
1009pcmcia_device_stringattr(prod_id1, prod_id[0]);
1010pcmcia_device_stringattr(prod_id2, prod_id[1]);
1011pcmcia_device_stringattr(prod_id3, prod_id[2]);
1012pcmcia_device_stringattr(prod_id4, prod_id[3]);
1013
1014
1015static ssize_t pcmcia_show_pm_state(struct device *dev, struct device_attribute *attr, char *buf)
1016{
1017 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1018
1019 if (p_dev->suspended)
1020 return sprintf(buf, "off\n");
1021 else
1022 return sprintf(buf, "on\n");
1023}
1024
1025static ssize_t pcmcia_store_pm_state(struct device *dev, struct device_attribute *attr,
1026 const char *buf, size_t count)
1027{
1028 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1029 int ret = 0;
1030
1031 if (!count)
1032 return -EINVAL;
1033
1034 if ((!p_dev->suspended) && !strncmp(buf, "off", 3))
1035 ret = runtime_suspend(dev);
1036 else if (p_dev->suspended && !strncmp(buf, "on", 2))
1037 ret = runtime_resume(dev);
1038
1039 return ret ? ret : count;
1040}
1041
1042
1043static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1044{
1045 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1046 int i;
1047 u32 hash[4] = { 0, 0, 0, 0};
1048
1049 /* calculate hashes */
1050 for (i = 0; i < 4; i++) {
1051 if (!p_dev->prod_id[i])
1052 continue;
1053 hash[i] = crc32(0, p_dev->prod_id[i],
1054 strlen(p_dev->prod_id[i]));
1055 }
1056 return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
1057 "pa%08Xpb%08Xpc%08Xpd%08X\n",
1058 p_dev->has_manf_id ? p_dev->manf_id : 0,
1059 p_dev->has_card_id ? p_dev->card_id : 0,
1060 p_dev->has_func_id ? p_dev->func_id : 0,
1061 p_dev->func, p_dev->device_no,
1062 hash[0], hash[1], hash[2], hash[3]);
1063}
1064
1065static ssize_t pcmcia_store_allow_func_id_match(struct device *dev,
1066 struct device_attribute *attr, const char *buf, size_t count)
1067{
1068 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1069
1070 if (!count)
1071 return -EINVAL;
1072
1073 mutex_lock(&p_dev->socket->ops_mutex);
1074 p_dev->allow_func_id_match = 1;
1075 mutex_unlock(&p_dev->socket->ops_mutex);
1076 pcmcia_parse_uevents(p_dev->socket, PCMCIA_UEVENT_REQUERY);
1077
1078 return count;
1079}
1080
1081static struct device_attribute pcmcia_dev_attrs[] = {
1082 __ATTR(function, 0444, func_show, NULL),
1083 __ATTR(pm_state, 0644, pcmcia_show_pm_state, pcmcia_store_pm_state),
1084 __ATTR_RO(func_id),
1085 __ATTR_RO(manf_id),
1086 __ATTR_RO(card_id),
1087 __ATTR_RO(prod_id1),
1088 __ATTR_RO(prod_id2),
1089 __ATTR_RO(prod_id3),
1090 __ATTR_RO(prod_id4),
1091 __ATTR_RO(modalias),
1092 __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match),
1093 __ATTR_NULL,
1094};
1095
1096/* PM support, also needed for reset */
1097
1098static int pcmcia_dev_suspend(struct device *dev, pm_message_t state)
1099{
1100 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1101 struct pcmcia_driver *p_drv = NULL;
1102 int ret = 0;
1103
1104 mutex_lock(&p_dev->socket->ops_mutex);
1105 if (p_dev->suspended) {
1106 mutex_unlock(&p_dev->socket->ops_mutex);
1107 return 0;
1108 }
1109 p_dev->suspended = 1;
1110 mutex_unlock(&p_dev->socket->ops_mutex);
1111
1112 dev_dbg(dev, "suspending\n");
1113
1114 if (dev->driver)
1115 p_drv = to_pcmcia_drv(dev->driver);
1116
1117 if (!p_drv)
1118 goto out;
1119
1120 if (p_drv->suspend) {
1121 ret = p_drv->suspend(p_dev);
1122 if (ret) {
1123 dev_printk(KERN_ERR, dev,
1124 "pcmcia: device %s (driver %s) did "
1125 "not want to go to sleep (%d)\n",
1126 p_dev->devname, p_drv->drv.name, ret);
1127 mutex_lock(&p_dev->socket->ops_mutex);
1128 p_dev->suspended = 0;
1129 mutex_unlock(&p_dev->socket->ops_mutex);
1130 goto out;
1131 }
1132 }
1133
1134 if (p_dev->device_no == p_dev->func) {
1135 dev_dbg(dev, "releasing configuration\n");
1136 pcmcia_release_configuration(p_dev);
1137 }
1138
1139 out:
1140 return ret;
1141}
1142
1143
1144static int pcmcia_dev_resume(struct device *dev)
1145{
1146 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1147 struct pcmcia_driver *p_drv = NULL;
1148 int ret = 0;
1149
1150 mutex_lock(&p_dev->socket->ops_mutex);
1151 if (!p_dev->suspended) {
1152 mutex_unlock(&p_dev->socket->ops_mutex);
1153 return 0;
1154 }
1155 p_dev->suspended = 0;
1156 mutex_unlock(&p_dev->socket->ops_mutex);
1157
1158 dev_dbg(dev, "resuming\n");
1159
1160 if (dev->driver)
1161 p_drv = to_pcmcia_drv(dev->driver);
1162
1163 if (!p_drv)
1164 goto out;
1165
1166 if (p_dev->device_no == p_dev->func) {
1167 dev_dbg(dev, "requesting configuration\n");
1168 ret = pcmcia_request_configuration(p_dev, &p_dev->conf);
1169 if (ret)
1170 goto out;
1171 }
1172
1173 if (p_drv->resume)
1174 ret = p_drv->resume(p_dev);
1175
1176 out:
1177 return ret;
1178}
1179
1180
1181static int pcmcia_bus_suspend_callback(struct device *dev, void * _data)
1182{
1183 struct pcmcia_socket *skt = _data;
1184 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1185
1186 if (p_dev->socket != skt || p_dev->suspended)
1187 return 0;
1188
1189 return runtime_suspend(dev);
1190}
1191
1192static int pcmcia_bus_resume_callback(struct device *dev, void * _data)
1193{
1194 struct pcmcia_socket *skt = _data;
1195 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1196
1197 if (p_dev->socket != skt || !p_dev->suspended)
1198 return 0;
1199
1200 runtime_resume(dev);
1201
1202 return 0;
1203}
1204
1205static int pcmcia_bus_resume(struct pcmcia_socket *skt)
1206{
1207 dev_dbg(&skt->dev, "resuming socket %d\n", skt->sock);
1208 bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback);
1209 return 0;
1210}
1211
1212static int pcmcia_bus_suspend(struct pcmcia_socket *skt)
1213{
1214 dev_dbg(&skt->dev, "suspending socket %d\n", skt->sock);
1215 if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt,
1216 pcmcia_bus_suspend_callback)) {
1217 pcmcia_bus_resume(skt);
1218 return -EIO;
1219 }
1220 return 0;
1221}
1222
1223static int pcmcia_bus_remove(struct pcmcia_socket *skt)
1224{
1225 atomic_set(&skt->present, 0);
1226 pcmcia_card_remove(skt, NULL);
1227
1228 mutex_lock(&skt->ops_mutex);
1229 destroy_cis_cache(skt);
1230 pcmcia_cleanup_irq(skt);
1231 mutex_unlock(&skt->ops_mutex);
1232
1233 return 0;
1234}
1235
1236static int pcmcia_bus_add(struct pcmcia_socket *skt)
1237{
1238 atomic_set(&skt->present, 1);
1239
1240 mutex_lock(&skt->ops_mutex);
1241 skt->pcmcia_pfc = 0;
1242 destroy_cis_cache(skt); /* to be on the safe side... */
1243 mutex_unlock(&skt->ops_mutex);
1244
1245 pcmcia_card_add(skt);
1246
1247 return 0;
1248}
1249
1250static int pcmcia_bus_early_resume(struct pcmcia_socket *skt)
1251{
1252 if (!verify_cis_cache(skt)) {
1253 pcmcia_put_socket(skt);
1254 return 0;
1255 }
1256
1257 dev_dbg(&skt->dev, "cis mismatch - different card\n");
1258
1259 /* first, remove the card */
1260 pcmcia_bus_remove(skt);
1261
1262 mutex_lock(&skt->ops_mutex);
1263 destroy_cis_cache(skt);
1264 kfree(skt->fake_cis);
1265 skt->fake_cis = NULL;
1266 skt->functions = 0;
1267 mutex_unlock(&skt->ops_mutex);
1268
1269 /* now, add the new card */
1270 pcmcia_bus_add(skt);
1271 return 0;
1272}
1273
1274
1275/*
1276 * NOTE: This is racy. There's no guarantee the card will still be
1277 * physically present, even if the call to this function returns
1278 * non-NULL. Furthermore, the device driver most likely is unbound
1279 * almost immediately, so the timeframe where pcmcia_dev_present
1280 * returns NULL is probably really really small.
1281 */
1282struct pcmcia_device *pcmcia_dev_present(struct pcmcia_device *_p_dev)
1283{
1284 struct pcmcia_device *p_dev;
1285 struct pcmcia_device *ret = NULL;
1286
1287 p_dev = pcmcia_get_dev(_p_dev);
1288 if (!p_dev)
1289 return NULL;
1290
1291 if (atomic_read(&p_dev->socket->present) != 0)
1292 ret = p_dev;
1293
1294 pcmcia_put_dev(p_dev);
1295 return ret;
1296}
1297EXPORT_SYMBOL(pcmcia_dev_present);
1298
1299
1300static struct pcmcia_callback pcmcia_bus_callback = {
1301 .owner = THIS_MODULE,
1302 .add = pcmcia_bus_add,
1303 .remove = pcmcia_bus_remove,
1304 .requery = pcmcia_requery,
1305 .validate = pccard_validate_cis,
1306 .suspend = pcmcia_bus_suspend,
1307 .early_resume = pcmcia_bus_early_resume,
1308 .resume = pcmcia_bus_resume,
1309};
1310
1311static int __devinit pcmcia_bus_add_socket(struct device *dev,
1312 struct class_interface *class_intf)
1313{
1314 struct pcmcia_socket *socket = dev_get_drvdata(dev);
1315 int ret;
1316
1317 socket = pcmcia_get_socket(socket);
1318 if (!socket) {
1319 dev_printk(KERN_ERR, dev,
1320 "PCMCIA obtaining reference to socket failed\n");
1321 return -ENODEV;
1322 }
1323
1324 ret = sysfs_create_bin_file(&dev->kobj, &pccard_cis_attr);
1325 if (ret) {
1326 dev_printk(KERN_ERR, dev, "PCMCIA registration failed\n");
1327 pcmcia_put_socket(socket);
1328 return ret;
1329 }
1330
1331 INIT_LIST_HEAD(&socket->devices_list);
1332 socket->pcmcia_pfc = 0;
1333 socket->device_count = 0;
1334 atomic_set(&socket->present, 0);
1335
1336 ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback);
1337 if (ret) {
1338 dev_printk(KERN_ERR, dev, "PCMCIA registration failed\n");
1339 pcmcia_put_socket(socket);
1340 return ret;
1341 }
1342
1343 return 0;
1344}
1345
1346static void pcmcia_bus_remove_socket(struct device *dev,
1347 struct class_interface *class_intf)
1348{
1349 struct pcmcia_socket *socket = dev_get_drvdata(dev);
1350
1351 if (!socket)
1352 return;
1353
1354 pccard_register_pcmcia(socket, NULL);
1355
1356 /* unregister any unbound devices */
1357 mutex_lock(&socket->skt_mutex);
1358 pcmcia_card_remove(socket, NULL);
1359 release_cis_mem(socket);
1360 mutex_unlock(&socket->skt_mutex);
1361
1362 sysfs_remove_bin_file(&dev->kobj, &pccard_cis_attr);
1363
1364 pcmcia_put_socket(socket);
1365
1366 return;
1367}
1368
1369
1370/* the pcmcia_bus_interface is used to handle pcmcia socket devices */
1371static struct class_interface pcmcia_bus_interface __refdata = {
1372 .class = &pcmcia_socket_class,
1373 .add_dev = &pcmcia_bus_add_socket,
1374 .remove_dev = &pcmcia_bus_remove_socket,
1375};
1376
1377
1378struct bus_type pcmcia_bus_type = {
1379 .name = "pcmcia",
1380 .uevent = pcmcia_bus_uevent,
1381 .match = pcmcia_bus_match,
1382 .dev_attrs = pcmcia_dev_attrs,
1383 .probe = pcmcia_device_probe,
1384 .remove = pcmcia_device_remove,
1385 .suspend = pcmcia_dev_suspend,
1386 .resume = pcmcia_dev_resume,
1387};
1388
1389
1390static int __init init_pcmcia_bus(void)
1391{
1392 int ret;
1393
1394 ret = bus_register(&pcmcia_bus_type);
1395 if (ret < 0) {
1396 printk(KERN_WARNING "pcmcia: bus_register error: %d\n", ret);
1397 return ret;
1398 }
1399 ret = class_interface_register(&pcmcia_bus_interface);
1400 if (ret < 0) {
1401 printk(KERN_WARNING
1402 "pcmcia: class_interface_register error: %d\n", ret);
1403 bus_unregister(&pcmcia_bus_type);
1404 return ret;
1405 }
1406
1407 return 0;
1408}
1409fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that
1410 * pcmcia_socket_class is already registered */
1411
1412
1413static void __exit exit_pcmcia_bus(void)
1414{
1415 class_interface_unregister(&pcmcia_bus_interface);
1416
1417 bus_unregister(&pcmcia_bus_type);
1418}
1419module_exit(exit_pcmcia_bus);
1420
1421
1422MODULE_ALIAS("ds");
Linux kernel - Deliverables
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