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pcmcia: pcmcia_dev_present bugfix
[deliverable/linux.git] / drivers / pcmcia / ds.c
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 - 2006 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_types.h>
30 #include <pcmcia/cs.h>
31 #include <pcmcia/cistpl.h>
32 #include <pcmcia/ds.h>
33 #include <pcmcia/ss.h>
34
35 #include "cs_internal.h"
36
37 /*====================================================================*/
38
39 /* Module parameters */
40
41 MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
42 MODULE_DESCRIPTION("PCMCIA Driver Services");
43 MODULE_LICENSE("GPL");
44
45
46 /*====================================================================*/
47
48 static void pcmcia_check_driver(struct pcmcia_driver *p_drv)
49 {
50 struct pcmcia_device_id *did = p_drv->id_table;
51 unsigned int i;
52 u32 hash;
53
54 if (!p_drv->probe || !p_drv->remove)
55 printk(KERN_DEBUG "pcmcia: %s lacks a requisite callback "
56 "function\n", p_drv->drv.name);
57
58 while (did && did->match_flags) {
59 for (i = 0; i < 4; i++) {
60 if (!did->prod_id[i])
61 continue;
62
63 hash = crc32(0, did->prod_id[i], strlen(did->prod_id[i]));
64 if (hash == did->prod_id_hash[i])
65 continue;
66
67 printk(KERN_DEBUG "pcmcia: %s: invalid hash for "
68 "product string \"%s\": is 0x%x, should "
69 "be 0x%x\n", p_drv->drv.name, did->prod_id[i],
70 did->prod_id_hash[i], hash);
71 printk(KERN_DEBUG "pcmcia: see "
72 "Documentation/pcmcia/devicetable.txt for "
73 "details\n");
74 }
75 did++;
76 }
77
78 return;
79 }
80
81
82 /*======================================================================*/
83
84
85 struct pcmcia_dynid {
86 struct list_head node;
87 struct pcmcia_device_id id;
88 };
89
90 /**
91 * pcmcia_store_new_id - add a new PCMCIA device ID to this driver and re-probe devices
92 * @driver: target device driver
93 * @buf: buffer for scanning device ID data
94 * @count: input size
95 *
96 * Adds a new dynamic PCMCIA device ID to this driver,
97 * and causes the driver to probe for all devices again.
98 */
99 static ssize_t
100 pcmcia_store_new_id(struct device_driver *driver, const char *buf, size_t count)
101 {
102 struct pcmcia_dynid *dynid;
103 struct pcmcia_driver *pdrv = to_pcmcia_drv(driver);
104 __u16 match_flags, manf_id, card_id;
105 __u8 func_id, function, device_no;
106 __u32 prod_id_hash[4] = {0, 0, 0, 0};
107 int fields = 0;
108 int retval = 0;
109
110 fields = sscanf(buf, "%hx %hx %hx %hhx %hhx %hhx %x %x %x %x",
111 &match_flags, &manf_id, &card_id, &func_id, &function, &device_no,
112 &prod_id_hash[0], &prod_id_hash[1], &prod_id_hash[2], &prod_id_hash[3]);
113 if (fields < 6)
114 return -EINVAL;
115
116 dynid = kzalloc(sizeof(struct pcmcia_dynid), GFP_KERNEL);
117 if (!dynid)
118 return -ENOMEM;
119
120 dynid->id.match_flags = match_flags;
121 dynid->id.manf_id = manf_id;
122 dynid->id.card_id = card_id;
123 dynid->id.func_id = func_id;
124 dynid->id.function = function;
125 dynid->id.device_no = device_no;
126 memcpy(dynid->id.prod_id_hash, prod_id_hash, sizeof(__u32) * 4);
127
128 mutex_lock(&pdrv->dynids.lock);
129 list_add_tail(&dynid->node, &pdrv->dynids.list);
130 mutex_unlock(&pdrv->dynids.lock);
131
132 if (get_driver(&pdrv->drv)) {
133 retval = driver_attach(&pdrv->drv);
134 put_driver(&pdrv->drv);
135 }
136
137 if (retval)
138 return retval;
139 return count;
140 }
141 static DRIVER_ATTR(new_id, S_IWUSR, NULL, pcmcia_store_new_id);
142
143 static void
144 pcmcia_free_dynids(struct pcmcia_driver *drv)
145 {
146 struct pcmcia_dynid *dynid, *n;
147
148 mutex_lock(&drv->dynids.lock);
149 list_for_each_entry_safe(dynid, n, &drv->dynids.list, node) {
150 list_del(&dynid->node);
151 kfree(dynid);
152 }
153 mutex_unlock(&drv->dynids.lock);
154 }
155
156 static int
157 pcmcia_create_newid_file(struct pcmcia_driver *drv)
158 {
159 int error = 0;
160 if (drv->probe != NULL)
161 error = driver_create_file(&drv->drv, &driver_attr_new_id);
162 return error;
163 }
164
165
166 /**
167 * pcmcia_register_driver - register a PCMCIA driver with the bus core
168 * @driver: the &driver being registered
169 *
170 * Registers a PCMCIA driver with the PCMCIA bus core.
171 */
172 int pcmcia_register_driver(struct pcmcia_driver *driver)
173 {
174 int error;
175
176 if (!driver)
177 return -EINVAL;
178
179 pcmcia_check_driver(driver);
180
181 /* initialize common fields */
182 driver->drv.bus = &pcmcia_bus_type;
183 driver->drv.owner = driver->owner;
184 mutex_init(&driver->dynids.lock);
185 INIT_LIST_HEAD(&driver->dynids.list);
186
187 pr_debug("registering driver %s\n", driver->drv.name);
188
189 error = driver_register(&driver->drv);
190 if (error < 0)
191 return error;
192
193 error = pcmcia_create_newid_file(driver);
194 if (error)
195 driver_unregister(&driver->drv);
196
197 return error;
198 }
199 EXPORT_SYMBOL(pcmcia_register_driver);
200
201 /**
202 * pcmcia_unregister_driver - unregister a PCMCIA driver with the bus core
203 * @driver: the &driver being unregistered
204 */
205 void pcmcia_unregister_driver(struct pcmcia_driver *driver)
206 {
207 pr_debug("unregistering driver %s\n", driver->drv.name);
208 driver_unregister(&driver->drv);
209 pcmcia_free_dynids(driver);
210 }
211 EXPORT_SYMBOL(pcmcia_unregister_driver);
212
213
214 /* pcmcia_device handling */
215
216 struct pcmcia_device *pcmcia_get_dev(struct pcmcia_device *p_dev)
217 {
218 struct device *tmp_dev;
219 tmp_dev = get_device(&p_dev->dev);
220 if (!tmp_dev)
221 return NULL;
222 return to_pcmcia_dev(tmp_dev);
223 }
224
225 void pcmcia_put_dev(struct pcmcia_device *p_dev)
226 {
227 if (p_dev)
228 put_device(&p_dev->dev);
229 }
230
231 static void pcmcia_release_function(struct kref *ref)
232 {
233 struct config_t *c = container_of(ref, struct config_t, ref);
234 pr_debug("releasing config_t\n");
235 kfree(c);
236 }
237
238 static void pcmcia_release_dev(struct device *dev)
239 {
240 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
241 int i;
242 dev_dbg(dev, "releasing device\n");
243 pcmcia_put_socket(p_dev->socket);
244 for (i = 0; i < 4; i++)
245 kfree(p_dev->prod_id[i]);
246 kfree(p_dev->devname);
247 kref_put(&p_dev->function_config->ref, pcmcia_release_function);
248 kfree(p_dev);
249 }
250
251
252 static int pcmcia_device_probe(struct device *dev)
253 {
254 struct pcmcia_device *p_dev;
255 struct pcmcia_driver *p_drv;
256 struct pcmcia_socket *s;
257 cistpl_config_t cis_config;
258 int ret = 0;
259
260 dev = get_device(dev);
261 if (!dev)
262 return -ENODEV;
263
264 p_dev = to_pcmcia_dev(dev);
265 p_drv = to_pcmcia_drv(dev->driver);
266 s = p_dev->socket;
267
268 dev_dbg(dev, "trying to bind to %s\n", p_drv->drv.name);
269
270 if ((!p_drv->probe) || (!p_dev->function_config) ||
271 (!try_module_get(p_drv->owner))) {
272 ret = -EINVAL;
273 goto put_dev;
274 }
275
276 /* set up some more device information */
277 ret = pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_CONFIG,
278 &cis_config);
279 if (!ret) {
280 p_dev->conf.ConfigBase = cis_config.base;
281 p_dev->conf.Present = cis_config.rmask[0];
282 } else {
283 dev_printk(KERN_INFO, dev,
284 "pcmcia: could not parse base and rmask0 of CIS\n");
285 p_dev->conf.ConfigBase = 0;
286 p_dev->conf.Present = 0;
287 }
288
289 ret = p_drv->probe(p_dev);
290 if (ret) {
291 dev_dbg(dev, "binding to %s failed with %d\n",
292 p_drv->drv.name, ret);
293 goto put_module;
294 }
295
296 mutex_lock(&s->ops_mutex);
297 if ((s->pcmcia_state.has_pfc) &&
298 (p_dev->socket->device_count == 1) && (p_dev->device_no == 0))
299 pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY);
300 mutex_unlock(&s->ops_mutex);
301
302 put_module:
303 if (ret)
304 module_put(p_drv->owner);
305 put_dev:
306 if (ret)
307 put_device(dev);
308 return ret;
309 }
310
311
312 /*
313 * Removes a PCMCIA card from the device tree and socket list.
314 */
315 static void pcmcia_card_remove(struct pcmcia_socket *s, struct pcmcia_device *leftover)
316 {
317 struct pcmcia_device *p_dev;
318 struct pcmcia_device *tmp;
319
320 dev_dbg(leftover ? &leftover->dev : &s->dev,
321 "pcmcia_card_remove(%d) %s\n", s->sock,
322 leftover ? leftover->devname : "");
323
324 mutex_lock(&s->ops_mutex);
325 if (!leftover)
326 s->device_count = 0;
327 else
328 s->device_count = 1;
329 mutex_unlock(&s->ops_mutex);
330
331 /* unregister all pcmcia_devices registered with this socket, except leftover */
332 list_for_each_entry_safe(p_dev, tmp, &s->devices_list, socket_device_list) {
333 if (p_dev == leftover)
334 continue;
335
336 mutex_lock(&s->ops_mutex);
337 list_del(&p_dev->socket_device_list);
338 mutex_unlock(&s->ops_mutex);
339
340 dev_dbg(&p_dev->dev, "unregistering device\n");
341 device_unregister(&p_dev->dev);
342 }
343
344 return;
345 }
346
347 static int pcmcia_device_remove(struct device *dev)
348 {
349 struct pcmcia_device *p_dev;
350 struct pcmcia_driver *p_drv;
351 int i;
352
353 p_dev = to_pcmcia_dev(dev);
354 p_drv = to_pcmcia_drv(dev->driver);
355
356 dev_dbg(dev, "removing device\n");
357
358 /* If we're removing the primary module driving a
359 * pseudo multi-function card, we need to unbind
360 * all devices
361 */
362 if ((p_dev->socket->pcmcia_state.has_pfc) &&
363 (p_dev->socket->device_count > 0) &&
364 (p_dev->device_no == 0))
365 pcmcia_card_remove(p_dev->socket, p_dev);
366
367 /* detach the "instance" */
368 if (!p_drv)
369 return 0;
370
371 if (p_drv->remove)
372 p_drv->remove(p_dev);
373
374 p_dev->dev_node = NULL;
375
376 /* check for proper unloading */
377 if (p_dev->_irq || p_dev->_io || p_dev->_locked)
378 dev_printk(KERN_INFO, dev,
379 "pcmcia: driver %s did not release config properly\n",
380 p_drv->drv.name);
381
382 for (i = 0; i < MAX_WIN; i++)
383 if (p_dev->_win & CLIENT_WIN_REQ(i))
384 dev_printk(KERN_INFO, dev,
385 "pcmcia: driver %s did not release window properly\n",
386 p_drv->drv.name);
387
388 /* references from pcmcia_probe_device */
389 pcmcia_put_dev(p_dev);
390 module_put(p_drv->owner);
391
392 return 0;
393 }
394
395
396 /*
397 * pcmcia_device_query -- determine information about a pcmcia device
398 */
399 static int pcmcia_device_query(struct pcmcia_device *p_dev)
400 {
401 cistpl_manfid_t manf_id;
402 cistpl_funcid_t func_id;
403 cistpl_vers_1_t *vers1;
404 unsigned int i;
405
406 vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL);
407 if (!vers1)
408 return -ENOMEM;
409
410 if (!pccard_read_tuple(p_dev->socket, BIND_FN_ALL,
411 CISTPL_MANFID, &manf_id)) {
412 mutex_lock(&p_dev->socket->ops_mutex);
413 p_dev->manf_id = manf_id.manf;
414 p_dev->card_id = manf_id.card;
415 p_dev->has_manf_id = 1;
416 p_dev->has_card_id = 1;
417 mutex_unlock(&p_dev->socket->ops_mutex);
418 }
419
420 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
421 CISTPL_FUNCID, &func_id)) {
422 mutex_lock(&p_dev->socket->ops_mutex);
423 p_dev->func_id = func_id.func;
424 p_dev->has_func_id = 1;
425 mutex_unlock(&p_dev->socket->ops_mutex);
426 } else {
427 /* rule of thumb: cards with no FUNCID, but with
428 * common memory device geometry information, are
429 * probably memory cards (from pcmcia-cs) */
430 cistpl_device_geo_t *devgeo;
431
432 devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL);
433 if (!devgeo) {
434 kfree(vers1);
435 return -ENOMEM;
436 }
437 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
438 CISTPL_DEVICE_GEO, devgeo)) {
439 dev_dbg(&p_dev->dev,
440 "mem device geometry probably means "
441 "FUNCID_MEMORY\n");
442 mutex_lock(&p_dev->socket->ops_mutex);
443 p_dev->func_id = CISTPL_FUNCID_MEMORY;
444 p_dev->has_func_id = 1;
445 mutex_unlock(&p_dev->socket->ops_mutex);
446 }
447 kfree(devgeo);
448 }
449
450 if (!pccard_read_tuple(p_dev->socket, BIND_FN_ALL, CISTPL_VERS_1,
451 vers1)) {
452 mutex_lock(&p_dev->socket->ops_mutex);
453 for (i = 0; i < min_t(unsigned int, 4, vers1->ns); i++) {
454 char *tmp;
455 unsigned int length;
456 char *new;
457
458 tmp = vers1->str + vers1->ofs[i];
459
460 length = strlen(tmp) + 1;
461 if ((length < 2) || (length > 255))
462 continue;
463
464 new = kmalloc(sizeof(char) * length, GFP_KERNEL);
465 if (!new)
466 continue;
467
468 new = strncpy(new, tmp, length);
469
470 tmp = p_dev->prod_id[i];
471 p_dev->prod_id[i] = new;
472 kfree(tmp);
473 }
474 mutex_unlock(&p_dev->socket->ops_mutex);
475 }
476
477 kfree(vers1);
478 return 0;
479 }
480
481
482 /* device_add_lock is needed to avoid double registration by cardmgr and kernel.
483 * Serializes pcmcia_device_add; will most likely be removed in future.
484 *
485 * While it has the caveat that adding new PCMCIA devices inside(!) device_register()
486 * won't work, this doesn't matter much at the moment: the driver core doesn't
487 * support it either.
488 */
489 static DEFINE_MUTEX(device_add_lock);
490
491 struct pcmcia_device *pcmcia_device_add(struct pcmcia_socket *s, unsigned int function)
492 {
493 struct pcmcia_device *p_dev, *tmp_dev;
494 int i;
495
496 s = pcmcia_get_socket(s);
497 if (!s)
498 return NULL;
499
500 mutex_lock(&device_add_lock);
501
502 pr_debug("adding device to %d, function %d\n", s->sock, function);
503
504 p_dev = kzalloc(sizeof(struct pcmcia_device), GFP_KERNEL);
505 if (!p_dev)
506 goto err_put;
507
508 mutex_lock(&s->ops_mutex);
509 p_dev->device_no = (s->device_count++);
510 mutex_unlock(&s->ops_mutex);
511
512 /* max of 2 PFC devices */
513 if ((p_dev->device_no >= 2) && (function == 0))
514 goto err_free;
515
516 /* max of 4 devices overall */
517 if (p_dev->device_no >= 4)
518 goto err_free;
519
520 p_dev->socket = s;
521 p_dev->func = function;
522
523 p_dev->dev.bus = &pcmcia_bus_type;
524 p_dev->dev.parent = s->dev.parent;
525 p_dev->dev.release = pcmcia_release_dev;
526 /* by default don't allow DMA */
527 p_dev->dma_mask = DMA_MASK_NONE;
528 p_dev->dev.dma_mask = &p_dev->dma_mask;
529 dev_set_name(&p_dev->dev, "%d.%d", p_dev->socket->sock, p_dev->device_no);
530 if (!dev_name(&p_dev->dev))
531 goto err_free;
532 p_dev->devname = kasprintf(GFP_KERNEL, "pcmcia%s", dev_name(&p_dev->dev));
533 if (!p_dev->devname)
534 goto err_free;
535 dev_dbg(&p_dev->dev, "devname is %s\n", p_dev->devname);
536
537 mutex_lock(&s->ops_mutex);
538
539 /*
540 * p_dev->function_config must be the same for all card functions.
541 * Note that this is serialized by the device_add_lock, so that
542 * only one such struct will be created.
543 */
544 list_for_each_entry(tmp_dev, &s->devices_list, socket_device_list)
545 if (p_dev->func == tmp_dev->func) {
546 p_dev->function_config = tmp_dev->function_config;
547 p_dev->io = tmp_dev->io;
548 p_dev->irq = tmp_dev->irq;
549 kref_get(&p_dev->function_config->ref);
550 }
551
552 /* Add to the list in pcmcia_bus_socket */
553 list_add(&p_dev->socket_device_list, &s->devices_list);
554
555 mutex_unlock(&s->ops_mutex);
556
557 if (!p_dev->function_config) {
558 dev_dbg(&p_dev->dev, "creating config_t\n");
559 p_dev->function_config = kzalloc(sizeof(struct config_t),
560 GFP_KERNEL);
561 if (!p_dev->function_config)
562 goto err_unreg;
563 kref_init(&p_dev->function_config->ref);
564 }
565
566 dev_printk(KERN_NOTICE, &p_dev->dev,
567 "pcmcia: registering new device %s\n",
568 p_dev->devname);
569
570 pcmcia_device_query(p_dev);
571
572 if (device_register(&p_dev->dev))
573 goto err_unreg;
574
575 mutex_unlock(&device_add_lock);
576
577 return p_dev;
578
579 err_unreg:
580 mutex_lock(&s->ops_mutex);
581 list_del(&p_dev->socket_device_list);
582 mutex_unlock(&s->ops_mutex);
583
584 err_free:
585 mutex_lock(&s->ops_mutex);
586 s->device_count--;
587 mutex_unlock(&s->ops_mutex);
588
589 for (i = 0; i < 4; i++)
590 kfree(p_dev->prod_id[i]);
591 kfree(p_dev->devname);
592 kfree(p_dev);
593 err_put:
594 mutex_unlock(&device_add_lock);
595 pcmcia_put_socket(s);
596
597 return NULL;
598 }
599
600
601 static int pcmcia_card_add(struct pcmcia_socket *s)
602 {
603 cistpl_longlink_mfc_t mfc;
604 unsigned int no_funcs, i, no_chains;
605 int ret = -EAGAIN;
606
607 mutex_lock(&s->ops_mutex);
608 if (!(s->resource_setup_done)) {
609 dev_dbg(&s->dev,
610 "no resources available, delaying card_add\n");
611 mutex_unlock(&s->ops_mutex);
612 return -EAGAIN; /* try again, but later... */
613 }
614
615 if (pcmcia_validate_mem(s)) {
616 dev_dbg(&s->dev, "validating mem resources failed, "
617 "delaying card_add\n");
618 mutex_unlock(&s->ops_mutex);
619 return -EAGAIN; /* try again, but later... */
620 }
621 mutex_unlock(&s->ops_mutex);
622
623 ret = pccard_validate_cis(s, &no_chains);
624 if (ret || !no_chains) {
625 dev_dbg(&s->dev, "invalid CIS or invalid resources\n");
626 return -ENODEV;
627 }
628
629 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
630 no_funcs = mfc.nfn;
631 else
632 no_funcs = 1;
633 s->functions = no_funcs;
634
635 for (i = 0; i < no_funcs; i++)
636 pcmcia_device_add(s, i);
637
638 return ret;
639 }
640
641
642 static int pcmcia_requery_callback(struct device *dev, void * _data)
643 {
644 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
645 if (!p_dev->dev.driver) {
646 dev_dbg(dev, "update device information\n");
647 pcmcia_device_query(p_dev);
648 }
649
650 return 0;
651 }
652
653
654 static void pcmcia_requery(struct pcmcia_socket *s)
655 {
656 int has_pfc;
657
658 if (s->functions == 0) {
659 pcmcia_card_add(s);
660 return;
661 }
662
663 /* some device information might have changed because of a CIS
664 * update or because we can finally read it correctly... so
665 * determine it again, overwriting old values if necessary. */
666 bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery_callback);
667
668 /* if the CIS changed, we need to check whether the number of
669 * functions changed. */
670 if (s->fake_cis) {
671 int old_funcs, new_funcs;
672 cistpl_longlink_mfc_t mfc;
673
674 /* does this cis override add or remove functions? */
675 old_funcs = s->functions;
676
677 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC,
678 &mfc))
679 new_funcs = mfc.nfn;
680 else
681 new_funcs = 1;
682 if (old_funcs != new_funcs) {
683 /* we need to re-start */
684 pcmcia_card_remove(s, NULL);
685 pcmcia_card_add(s);
686 }
687 }
688
689 /* If the PCMCIA device consists of two pseudo devices,
690 * call pcmcia_device_add() -- which will fail if both
691 * devices are already registered. */
692 mutex_lock(&s->ops_mutex);
693 has_pfc = s->pcmcia_state.has_pfc;
694 mutex_unlock(&s->ops_mutex);
695 if (has_pfc)
696 pcmcia_device_add(s, 0);
697
698 /* we re-scan all devices, not just the ones connected to this
699 * socket. This does not matter, though. */
700 if (bus_rescan_devices(&pcmcia_bus_type))
701 dev_warn(&s->dev, "rescanning the bus failed\n");
702 }
703
704
705 #ifdef CONFIG_PCMCIA_LOAD_CIS
706
707 /**
708 * pcmcia_load_firmware - load CIS from userspace if device-provided is broken
709 * @dev: the pcmcia device which needs a CIS override
710 * @filename: requested filename in /lib/firmware/
711 *
712 * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if
713 * the one provided by the card is broken. The firmware files reside in
714 * /lib/firmware/ in userspace.
715 */
716 static int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
717 {
718 struct pcmcia_socket *s = dev->socket;
719 const struct firmware *fw;
720 int ret = -ENOMEM;
721 cistpl_longlink_mfc_t mfc;
722 int old_funcs, new_funcs = 1;
723
724 if (!filename)
725 return -EINVAL;
726
727 dev_dbg(&dev->dev, "trying to load CIS file %s\n", filename);
728
729 if (request_firmware(&fw, filename, &dev->dev) == 0) {
730 if (fw->size >= CISTPL_MAX_CIS_SIZE) {
731 ret = -EINVAL;
732 dev_printk(KERN_ERR, &dev->dev,
733 "pcmcia: CIS override is too big\n");
734 goto release;
735 }
736
737 if (!pcmcia_replace_cis(s, fw->data, fw->size))
738 ret = 0;
739 else {
740 dev_printk(KERN_ERR, &dev->dev,
741 "pcmcia: CIS override failed\n");
742 goto release;
743 }
744
745 /* we need to re-start if the number of functions changed */
746 old_funcs = s->functions;
747 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC,
748 &mfc))
749 new_funcs = mfc.nfn;
750
751 if (old_funcs != new_funcs)
752 ret = -EBUSY;
753
754 /* update information */
755 pcmcia_device_query(dev);
756
757 /* requery (as number of functions might have changed) */
758 pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY);
759 }
760 release:
761 release_firmware(fw);
762
763 return ret;
764 }
765
766 #else /* !CONFIG_PCMCIA_LOAD_CIS */
767
768 static inline int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
769 {
770 return -ENODEV;
771 }
772
773 #endif
774
775
776 static inline int pcmcia_devmatch(struct pcmcia_device *dev,
777 struct pcmcia_device_id *did)
778 {
779 if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
780 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
781 return 0;
782 }
783
784 if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
785 if ((!dev->has_card_id) || (dev->card_id != did->card_id))
786 return 0;
787 }
788
789 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
790 if (dev->func != did->function)
791 return 0;
792 }
793
794 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
795 if (!dev->prod_id[0])
796 return 0;
797 if (strcmp(did->prod_id[0], dev->prod_id[0]))
798 return 0;
799 }
800
801 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
802 if (!dev->prod_id[1])
803 return 0;
804 if (strcmp(did->prod_id[1], dev->prod_id[1]))
805 return 0;
806 }
807
808 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
809 if (!dev->prod_id[2])
810 return 0;
811 if (strcmp(did->prod_id[2], dev->prod_id[2]))
812 return 0;
813 }
814
815 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
816 if (!dev->prod_id[3])
817 return 0;
818 if (strcmp(did->prod_id[3], dev->prod_id[3]))
819 return 0;
820 }
821
822 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
823 if (dev->device_no != did->device_no)
824 return 0;
825 mutex_lock(&dev->socket->ops_mutex);
826 dev->socket->pcmcia_state.has_pfc = 1;
827 mutex_unlock(&dev->socket->ops_mutex);
828 }
829
830 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
831 int ret;
832
833 if ((!dev->has_func_id) || (dev->func_id != did->func_id))
834 return 0;
835
836 /* if this is a pseudo-multi-function device,
837 * we need explicit matches */
838 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO)
839 return 0;
840 if (dev->device_no)
841 return 0;
842
843 /* also, FUNC_ID matching needs to be activated by userspace
844 * after it has re-checked that there is no possible module
845 * with a prod_id/manf_id/card_id match.
846 */
847 mutex_lock(&dev->socket->ops_mutex);
848 ret = dev->allow_func_id_match;
849 mutex_unlock(&dev->socket->ops_mutex);
850
851 if (!ret) {
852 dev_dbg(&dev->dev,
853 "skipping FUNC_ID match until userspace ACK\n");
854 return 0;
855 }
856 }
857
858 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
859 dev_dbg(&dev->dev, "device needs a fake CIS\n");
860 if (!dev->socket->fake_cis)
861 if (pcmcia_load_firmware(dev, did->cisfile))
862 return 0;
863 }
864
865 if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
866 int i;
867 for (i = 0; i < 4; i++)
868 if (dev->prod_id[i])
869 return 0;
870 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
871 return 0;
872 }
873
874 return 1;
875 }
876
877
878 static int pcmcia_bus_match(struct device *dev, struct device_driver *drv)
879 {
880 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
881 struct pcmcia_driver *p_drv = to_pcmcia_drv(drv);
882 struct pcmcia_device_id *did = p_drv->id_table;
883 struct pcmcia_dynid *dynid;
884
885 /* match dynamic devices first */
886 mutex_lock(&p_drv->dynids.lock);
887 list_for_each_entry(dynid, &p_drv->dynids.list, node) {
888 dev_dbg(dev, "trying to match to %s\n", drv->name);
889 if (pcmcia_devmatch(p_dev, &dynid->id)) {
890 dev_dbg(dev, "matched to %s\n", drv->name);
891 mutex_unlock(&p_drv->dynids.lock);
892 return 1;
893 }
894 }
895 mutex_unlock(&p_drv->dynids.lock);
896
897 #ifdef CONFIG_PCMCIA_IOCTL
898 /* matching by cardmgr */
899 if (p_dev->cardmgr == p_drv) {
900 dev_dbg(dev, "cardmgr matched to %s\n", drv->name);
901 return 1;
902 }
903 #endif
904
905 while (did && did->match_flags) {
906 dev_dbg(dev, "trying to match to %s\n", drv->name);
907 if (pcmcia_devmatch(p_dev, did)) {
908 dev_dbg(dev, "matched to %s\n", drv->name);
909 return 1;
910 }
911 did++;
912 }
913
914 return 0;
915 }
916
917 #ifdef CONFIG_HOTPLUG
918
919 static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
920 {
921 struct pcmcia_device *p_dev;
922 int i;
923 u32 hash[4] = { 0, 0, 0, 0};
924
925 if (!dev)
926 return -ENODEV;
927
928 p_dev = to_pcmcia_dev(dev);
929
930 /* calculate hashes */
931 for (i = 0; i < 4; i++) {
932 if (!p_dev->prod_id[i])
933 continue;
934 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
935 }
936
937 if (add_uevent_var(env, "SOCKET_NO=%u", p_dev->socket->sock))
938 return -ENOMEM;
939
940 if (add_uevent_var(env, "DEVICE_NO=%02X", p_dev->device_no))
941 return -ENOMEM;
942
943 if (add_uevent_var(env, "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
944 "pa%08Xpb%08Xpc%08Xpd%08X",
945 p_dev->has_manf_id ? p_dev->manf_id : 0,
946 p_dev->has_card_id ? p_dev->card_id : 0,
947 p_dev->has_func_id ? p_dev->func_id : 0,
948 p_dev->func,
949 p_dev->device_no,
950 hash[0],
951 hash[1],
952 hash[2],
953 hash[3]))
954 return -ENOMEM;
955
956 return 0;
957 }
958
959 #else
960
961 static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
962 {
963 return -ENODEV;
964 }
965
966 #endif
967
968 /************************ runtime PM support ***************************/
969
970 static int pcmcia_dev_suspend(struct device *dev, pm_message_t state);
971 static int pcmcia_dev_resume(struct device *dev);
972
973 static int runtime_suspend(struct device *dev)
974 {
975 int rc;
976
977 device_lock(dev);
978 rc = pcmcia_dev_suspend(dev, PMSG_SUSPEND);
979 device_unlock(dev);
980 return rc;
981 }
982
983 static int runtime_resume(struct device *dev)
984 {
985 int rc;
986
987 device_lock(dev);
988 rc = pcmcia_dev_resume(dev);
989 device_unlock(dev);
990 return rc;
991 }
992
993 /************************ per-device sysfs output ***************************/
994
995 #define pcmcia_device_attr(field, test, format) \
996 static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf) \
997 { \
998 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
999 return p_dev->test ? sprintf(buf, format, p_dev->field) : -ENODEV; \
1000 }
1001
1002 #define pcmcia_device_stringattr(name, field) \
1003 static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf) \
1004 { \
1005 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
1006 return p_dev->field ? sprintf(buf, "%s\n", p_dev->field) : -ENODEV; \
1007 }
1008
1009 pcmcia_device_attr(func, socket, "0x%02x\n");
1010 pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
1011 pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
1012 pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
1013 pcmcia_device_stringattr(prod_id1, prod_id[0]);
1014 pcmcia_device_stringattr(prod_id2, prod_id[1]);
1015 pcmcia_device_stringattr(prod_id3, prod_id[2]);
1016 pcmcia_device_stringattr(prod_id4, prod_id[3]);
1017
1018
1019 static ssize_t pcmcia_show_pm_state(struct device *dev, struct device_attribute *attr, char *buf)
1020 {
1021 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1022
1023 if (p_dev->suspended)
1024 return sprintf(buf, "off\n");
1025 else
1026 return sprintf(buf, "on\n");
1027 }
1028
1029 static ssize_t pcmcia_store_pm_state(struct device *dev, struct device_attribute *attr,
1030 const char *buf, size_t count)
1031 {
1032 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1033 int ret = 0;
1034
1035 if (!count)
1036 return -EINVAL;
1037
1038 if ((!p_dev->suspended) && !strncmp(buf, "off", 3))
1039 ret = runtime_suspend(dev);
1040 else if (p_dev->suspended && !strncmp(buf, "on", 2))
1041 ret = runtime_resume(dev);
1042
1043 return ret ? ret : count;
1044 }
1045
1046
1047 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1048 {
1049 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1050 int i;
1051 u32 hash[4] = { 0, 0, 0, 0};
1052
1053 /* calculate hashes */
1054 for (i = 0; i < 4; i++) {
1055 if (!p_dev->prod_id[i])
1056 continue;
1057 hash[i] = crc32(0, p_dev->prod_id[i],
1058 strlen(p_dev->prod_id[i]));
1059 }
1060 return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
1061 "pa%08Xpb%08Xpc%08Xpd%08X\n",
1062 p_dev->has_manf_id ? p_dev->manf_id : 0,
1063 p_dev->has_card_id ? p_dev->card_id : 0,
1064 p_dev->has_func_id ? p_dev->func_id : 0,
1065 p_dev->func, p_dev->device_no,
1066 hash[0], hash[1], hash[2], hash[3]);
1067 }
1068
1069 static ssize_t pcmcia_store_allow_func_id_match(struct device *dev,
1070 struct device_attribute *attr, const char *buf, size_t count)
1071 {
1072 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1073
1074 if (!count)
1075 return -EINVAL;
1076
1077 mutex_lock(&p_dev->socket->ops_mutex);
1078 p_dev->allow_func_id_match = 1;
1079 mutex_unlock(&p_dev->socket->ops_mutex);
1080 pcmcia_parse_uevents(p_dev->socket, PCMCIA_UEVENT_REQUERY);
1081
1082 return count;
1083 }
1084
1085 static struct device_attribute pcmcia_dev_attrs[] = {
1086 __ATTR(function, 0444, func_show, NULL),
1087 __ATTR(pm_state, 0644, pcmcia_show_pm_state, pcmcia_store_pm_state),
1088 __ATTR_RO(func_id),
1089 __ATTR_RO(manf_id),
1090 __ATTR_RO(card_id),
1091 __ATTR_RO(prod_id1),
1092 __ATTR_RO(prod_id2),
1093 __ATTR_RO(prod_id3),
1094 __ATTR_RO(prod_id4),
1095 __ATTR_RO(modalias),
1096 __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match),
1097 __ATTR_NULL,
1098 };
1099
1100 /* PM support, also needed for reset */
1101
1102 static int pcmcia_dev_suspend(struct device *dev, pm_message_t state)
1103 {
1104 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1105 struct pcmcia_driver *p_drv = NULL;
1106 int ret = 0;
1107
1108 mutex_lock(&p_dev->socket->ops_mutex);
1109 if (p_dev->suspended) {
1110 mutex_unlock(&p_dev->socket->ops_mutex);
1111 return 0;
1112 }
1113 p_dev->suspended = 1;
1114 mutex_unlock(&p_dev->socket->ops_mutex);
1115
1116 dev_dbg(dev, "suspending\n");
1117
1118 if (dev->driver)
1119 p_drv = to_pcmcia_drv(dev->driver);
1120
1121 if (!p_drv)
1122 goto out;
1123
1124 if (p_drv->suspend) {
1125 ret = p_drv->suspend(p_dev);
1126 if (ret) {
1127 dev_printk(KERN_ERR, dev,
1128 "pcmcia: device %s (driver %s) did "
1129 "not want to go to sleep (%d)\n",
1130 p_dev->devname, p_drv->drv.name, ret);
1131 mutex_lock(&p_dev->socket->ops_mutex);
1132 p_dev->suspended = 0;
1133 mutex_unlock(&p_dev->socket->ops_mutex);
1134 goto out;
1135 }
1136 }
1137
1138 if (p_dev->device_no == p_dev->func) {
1139 dev_dbg(dev, "releasing configuration\n");
1140 pcmcia_release_configuration(p_dev);
1141 }
1142
1143 out:
1144 return ret;
1145 }
1146
1147
1148 static int pcmcia_dev_resume(struct device *dev)
1149 {
1150 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1151 struct pcmcia_driver *p_drv = NULL;
1152 int ret = 0;
1153
1154 mutex_lock(&p_dev->socket->ops_mutex);
1155 if (!p_dev->suspended) {
1156 mutex_unlock(&p_dev->socket->ops_mutex);
1157 return 0;
1158 }
1159 p_dev->suspended = 0;
1160 mutex_unlock(&p_dev->socket->ops_mutex);
1161
1162 dev_dbg(dev, "resuming\n");
1163
1164 if (dev->driver)
1165 p_drv = to_pcmcia_drv(dev->driver);
1166
1167 if (!p_drv)
1168 goto out;
1169
1170 if (p_dev->device_no == p_dev->func) {
1171 dev_dbg(dev, "requesting configuration\n");
1172 ret = pcmcia_request_configuration(p_dev, &p_dev->conf);
1173 if (ret)
1174 goto out;
1175 }
1176
1177 if (p_drv->resume)
1178 ret = p_drv->resume(p_dev);
1179
1180 out:
1181 return ret;
1182 }
1183
1184
1185 static int pcmcia_bus_suspend_callback(struct device *dev, void * _data)
1186 {
1187 struct pcmcia_socket *skt = _data;
1188 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1189
1190 if (p_dev->socket != skt || p_dev->suspended)
1191 return 0;
1192
1193 return runtime_suspend(dev);
1194 }
1195
1196 static int pcmcia_bus_resume_callback(struct device *dev, void * _data)
1197 {
1198 struct pcmcia_socket *skt = _data;
1199 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1200
1201 if (p_dev->socket != skt || !p_dev->suspended)
1202 return 0;
1203
1204 runtime_resume(dev);
1205
1206 return 0;
1207 }
1208
1209 static int pcmcia_bus_resume(struct pcmcia_socket *skt)
1210 {
1211 dev_dbg(&skt->dev, "resuming socket %d\n", skt->sock);
1212 bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback);
1213 return 0;
1214 }
1215
1216 static int pcmcia_bus_suspend(struct pcmcia_socket *skt)
1217 {
1218 dev_dbg(&skt->dev, "suspending socket %d\n", skt->sock);
1219 if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt,
1220 pcmcia_bus_suspend_callback)) {
1221 pcmcia_bus_resume(skt);
1222 return -EIO;
1223 }
1224 return 0;
1225 }
1226
1227
1228 /*======================================================================
1229
1230 The card status event handler.
1231
1232 ======================================================================*/
1233
1234 /* Normally, the event is passed to individual drivers after
1235 * informing userspace. Only for CS_EVENT_CARD_REMOVAL this
1236 * is inversed to maintain historic compatibility.
1237 */
1238
1239 static int ds_event(struct pcmcia_socket *skt, event_t event, int priority)
1240 {
1241 struct pcmcia_socket *s = pcmcia_get_socket(skt);
1242
1243 if (!s) {
1244 dev_printk(KERN_ERR, &skt->dev,
1245 "PCMCIA obtaining reference to socket " \
1246 "failed, event 0x%x lost!\n", event);
1247 return -ENODEV;
1248 }
1249
1250 dev_dbg(&skt->dev, "ds_event(0x%06x, %d, 0x%p)\n",
1251 event, priority, skt);
1252
1253 switch (event) {
1254 case CS_EVENT_CARD_REMOVAL:
1255 atomic_set(&skt->present, 0);
1256 pcmcia_card_remove(skt, NULL);
1257 handle_event(skt, event);
1258 mutex_lock(&s->ops_mutex);
1259 destroy_cis_cache(s);
1260 mutex_unlock(&s->ops_mutex);
1261 break;
1262
1263 case CS_EVENT_CARD_INSERTION:
1264 atomic_set(&skt->present, 1);
1265 mutex_lock(&s->ops_mutex);
1266 s->pcmcia_state.has_pfc = 0;
1267 destroy_cis_cache(s); /* to be on the safe side... */
1268 mutex_unlock(&s->ops_mutex);
1269 pcmcia_card_add(skt);
1270 handle_event(skt, event);
1271 break;
1272
1273 case CS_EVENT_EJECTION_REQUEST:
1274 break;
1275
1276 case CS_EVENT_PM_RESUME:
1277 if (verify_cis_cache(skt) != 0) {
1278 dev_dbg(&skt->dev, "cis mismatch - different card\n");
1279 /* first, remove the card */
1280 ds_event(skt, CS_EVENT_CARD_REMOVAL, CS_EVENT_PRI_HIGH);
1281 mutex_lock(&s->ops_mutex);
1282 destroy_cis_cache(skt);
1283 kfree(skt->fake_cis);
1284 skt->fake_cis = NULL;
1285 mutex_unlock(&s->ops_mutex);
1286 /* now, add the new card */
1287 ds_event(skt, CS_EVENT_CARD_INSERTION,
1288 CS_EVENT_PRI_LOW);
1289 }
1290 handle_event(skt, event);
1291 break;
1292
1293 case CS_EVENT_PM_SUSPEND:
1294 case CS_EVENT_RESET_PHYSICAL:
1295 case CS_EVENT_CARD_RESET:
1296 default:
1297 handle_event(skt, event);
1298 break;
1299 }
1300
1301 pcmcia_put_socket(s);
1302
1303 return 0;
1304 } /* ds_event */
1305
1306 /*
1307 * NOTE: This is racy. There's no guarantee the card will still be
1308 * physically present, even if the call to this function returns
1309 * non-NULL. Furthermore, the device driver most likely is unbound
1310 * almost immediately, so the timeframe where pcmcia_dev_present
1311 * returns NULL is probably really really small.
1312 */
1313 struct pcmcia_device *pcmcia_dev_present(struct pcmcia_device *_p_dev)
1314 {
1315 struct pcmcia_device *p_dev;
1316 struct pcmcia_device *ret = NULL;
1317
1318 p_dev = pcmcia_get_dev(_p_dev);
1319 if (!p_dev)
1320 return NULL;
1321
1322 if (atomic_read(&p_dev->socket->present) != 0)
1323 ret = p_dev;
1324
1325 pcmcia_put_dev(p_dev);
1326 return ret;
1327 }
1328 EXPORT_SYMBOL(pcmcia_dev_present);
1329
1330
1331 static struct pcmcia_callback pcmcia_bus_callback = {
1332 .owner = THIS_MODULE,
1333 .event = ds_event,
1334 .requery = pcmcia_requery,
1335 .validate = pccard_validate_cis,
1336 .suspend = pcmcia_bus_suspend,
1337 .resume = pcmcia_bus_resume,
1338 };
1339
1340 static int __devinit pcmcia_bus_add_socket(struct device *dev,
1341 struct class_interface *class_intf)
1342 {
1343 struct pcmcia_socket *socket = dev_get_drvdata(dev);
1344 int ret;
1345
1346 socket = pcmcia_get_socket(socket);
1347 if (!socket) {
1348 dev_printk(KERN_ERR, dev,
1349 "PCMCIA obtaining reference to socket failed\n");
1350 return -ENODEV;
1351 }
1352
1353 ret = sysfs_create_bin_file(&dev->kobj, &pccard_cis_attr);
1354 if (ret) {
1355 dev_printk(KERN_ERR, dev, "PCMCIA registration failed\n");
1356 pcmcia_put_socket(socket);
1357 return ret;
1358 }
1359
1360 #ifdef CONFIG_PCMCIA_IOCTL
1361 init_waitqueue_head(&socket->queue);
1362 #endif
1363 INIT_LIST_HEAD(&socket->devices_list);
1364 memset(&socket->pcmcia_state, 0, sizeof(u8));
1365 socket->device_count = 0;
1366
1367 ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback);
1368 if (ret) {
1369 dev_printk(KERN_ERR, dev, "PCMCIA registration failed\n");
1370 pcmcia_put_socket(socket);
1371 return ret;
1372 }
1373
1374 atomic_set(&socket->present, 0);
1375
1376 return 0;
1377 }
1378
1379 static void pcmcia_bus_remove_socket(struct device *dev,
1380 struct class_interface *class_intf)
1381 {
1382 struct pcmcia_socket *socket = dev_get_drvdata(dev);
1383
1384 if (!socket)
1385 return;
1386
1387 pccard_register_pcmcia(socket, NULL);
1388
1389 /* unregister any unbound devices */
1390 mutex_lock(&socket->skt_mutex);
1391 pcmcia_card_remove(socket, NULL);
1392 release_cis_mem(socket);
1393 mutex_unlock(&socket->skt_mutex);
1394
1395 sysfs_remove_bin_file(&dev->kobj, &pccard_cis_attr);
1396
1397 pcmcia_put_socket(socket);
1398
1399 return;
1400 }
1401
1402
1403 /* the pcmcia_bus_interface is used to handle pcmcia socket devices */
1404 static struct class_interface pcmcia_bus_interface __refdata = {
1405 .class = &pcmcia_socket_class,
1406 .add_dev = &pcmcia_bus_add_socket,
1407 .remove_dev = &pcmcia_bus_remove_socket,
1408 };
1409
1410
1411 struct bus_type pcmcia_bus_type = {
1412 .name = "pcmcia",
1413 .uevent = pcmcia_bus_uevent,
1414 .match = pcmcia_bus_match,
1415 .dev_attrs = pcmcia_dev_attrs,
1416 .probe = pcmcia_device_probe,
1417 .remove = pcmcia_device_remove,
1418 .suspend = pcmcia_dev_suspend,
1419 .resume = pcmcia_dev_resume,
1420 };
1421
1422
1423 static int __init init_pcmcia_bus(void)
1424 {
1425 int ret;
1426
1427 ret = bus_register(&pcmcia_bus_type);
1428 if (ret < 0) {
1429 printk(KERN_WARNING "pcmcia: bus_register error: %d\n", ret);
1430 return ret;
1431 }
1432 ret = class_interface_register(&pcmcia_bus_interface);
1433 if (ret < 0) {
1434 printk(KERN_WARNING
1435 "pcmcia: class_interface_register error: %d\n", ret);
1436 bus_unregister(&pcmcia_bus_type);
1437 return ret;
1438 }
1439
1440 pcmcia_setup_ioctl();
1441
1442 return 0;
1443 }
1444 fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that
1445 * pcmcia_socket_class is already registered */
1446
1447
1448 static void __exit exit_pcmcia_bus(void)
1449 {
1450 pcmcia_cleanup_ioctl();
1451
1452 class_interface_unregister(&pcmcia_bus_interface);
1453
1454 bus_unregister(&pcmcia_bus_type);
1455 }
1456 module_exit(exit_pcmcia_bus);
1457
1458
1459 MODULE_ALIAS("ds");
Linux kernel - Deliverables
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