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drm/edid: Split mode lists out to their own header for readability
[linux-2.6/kvm.git] / drivers / pcmcia / ds.c
blobeac961463be2db5b4013e152e1ede2bccf85c1d2
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 /* check for proper unloading */
375 if (p_dev->_irq || p_dev->_io || p_dev->_locked)
376 dev_printk(KERN_INFO, dev,
377 "pcmcia: driver %s did not release config properly\n",
378 p_drv->drv.name);
379
380 for (i = 0; i < MAX_WIN; i++)
381 if (p_dev->_win & CLIENT_WIN_REQ(i))
382 dev_printk(KERN_INFO, dev,
383 "pcmcia: driver %s did not release window properly\n",
384 p_drv->drv.name);
385
386 /* references from pcmcia_probe_device */
387 pcmcia_put_dev(p_dev);
388 module_put(p_drv->owner);
389
390 return 0;
391 }
392
393
394 /*
395 * pcmcia_device_query -- determine information about a pcmcia device
396 */
397 static int pcmcia_device_query(struct pcmcia_device *p_dev)
398 {
399 cistpl_manfid_t manf_id;
400 cistpl_funcid_t func_id;
401 cistpl_vers_1_t *vers1;
402 unsigned int i;
403
404 vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL);
405 if (!vers1)
406 return -ENOMEM;
407
408 if (!pccard_read_tuple(p_dev->socket, BIND_FN_ALL,
409 CISTPL_MANFID, &manf_id)) {
410 mutex_lock(&p_dev->socket->ops_mutex);
411 p_dev->manf_id = manf_id.manf;
412 p_dev->card_id = manf_id.card;
413 p_dev->has_manf_id = 1;
414 p_dev->has_card_id = 1;
415 mutex_unlock(&p_dev->socket->ops_mutex);
416 }
417
418 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
419 CISTPL_FUNCID, &func_id)) {
420 mutex_lock(&p_dev->socket->ops_mutex);
421 p_dev->func_id = func_id.func;
422 p_dev->has_func_id = 1;
423 mutex_unlock(&p_dev->socket->ops_mutex);
424 } else {
425 /* rule of thumb: cards with no FUNCID, but with
426 * common memory device geometry information, are
427 * probably memory cards (from pcmcia-cs) */
428 cistpl_device_geo_t *devgeo;
429
430 devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL);
431 if (!devgeo) {
432 kfree(vers1);
433 return -ENOMEM;
434 }
435 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
436 CISTPL_DEVICE_GEO, devgeo)) {
437 dev_dbg(&p_dev->dev,
438 "mem device geometry probably means "
439 "FUNCID_MEMORY\n");
440 mutex_lock(&p_dev->socket->ops_mutex);
441 p_dev->func_id = CISTPL_FUNCID_MEMORY;
442 p_dev->has_func_id = 1;
443 mutex_unlock(&p_dev->socket->ops_mutex);
444 }
445 kfree(devgeo);
446 }
447
448 if (!pccard_read_tuple(p_dev->socket, BIND_FN_ALL, CISTPL_VERS_1,
449 vers1)) {
450 mutex_lock(&p_dev->socket->ops_mutex);
451 for (i = 0; i < min_t(unsigned int, 4, vers1->ns); i++) {
452 char *tmp;
453 unsigned int length;
454 char *new;
455
456 tmp = vers1->str + vers1->ofs[i];
457
458 length = strlen(tmp) + 1;
459 if ((length < 2) || (length > 255))
460 continue;
461
462 new = kmalloc(sizeof(char) * length, GFP_KERNEL);
463 if (!new)
464 continue;
465
466 new = strncpy(new, tmp, length);
467
468 tmp = p_dev->prod_id[i];
469 p_dev->prod_id[i] = new;
470 kfree(tmp);
471 }
472 mutex_unlock(&p_dev->socket->ops_mutex);
473 }
474
475 kfree(vers1);
476 return 0;
477 }
478
479
480 struct pcmcia_device *pcmcia_device_add(struct pcmcia_socket *s, 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->io = tmp_dev->io;
535 p_dev->irq = tmp_dev->irq;
536 kref_get(&p_dev->function_config->ref);
537 }
538
539 /* Add to the list in pcmcia_bus_socket */
540 list_add(&p_dev->socket_device_list, &s->devices_list);
541
542 if (pcmcia_setup_irq(p_dev))
543 dev_warn(&p_dev->dev,
544 "IRQ setup failed -- device might not work\n");
545
546 if (!p_dev->function_config) {
547 dev_dbg(&p_dev->dev, "creating config_t\n");
548 p_dev->function_config = kzalloc(sizeof(struct config_t),
549 GFP_KERNEL);
550 if (!p_dev->function_config) {
551 mutex_unlock(&s->ops_mutex);
552 goto err_unreg;
553 }
554 kref_init(&p_dev->function_config->ref);
555 }
556 mutex_unlock(&s->ops_mutex);
557
558 dev_printk(KERN_NOTICE, &p_dev->dev,
559 "pcmcia: registering new device %s (IRQ: %d)\n",
560 p_dev->devname, p_dev->irq);
561
562 pcmcia_device_query(p_dev);
563
564 if (device_register(&p_dev->dev))
565 goto err_unreg;
566
567 return p_dev;
568
569 err_unreg:
570 mutex_lock(&s->ops_mutex);
571 list_del(&p_dev->socket_device_list);
572 mutex_unlock(&s->ops_mutex);
573
574 err_free:
575 mutex_lock(&s->ops_mutex);
576 s->device_count--;
577 mutex_unlock(&s->ops_mutex);
578
579 for (i = 0; i < 4; i++)
580 kfree(p_dev->prod_id[i]);
581 kfree(p_dev->devname);
582 kfree(p_dev);
583 err_put:
584 pcmcia_put_socket(s);
585
586 return NULL;
587 }
588
589
590 static int pcmcia_card_add(struct pcmcia_socket *s)
591 {
592 cistpl_longlink_mfc_t mfc;
593 unsigned int no_funcs, i, no_chains;
594 int ret = -EAGAIN;
595
596 mutex_lock(&s->ops_mutex);
597 if (!(s->resource_setup_done)) {
598 dev_dbg(&s->dev,
599 "no resources available, delaying card_add\n");
600 mutex_unlock(&s->ops_mutex);
601 return -EAGAIN; /* try again, but later... */
602 }
603
604 if (pcmcia_validate_mem(s)) {
605 dev_dbg(&s->dev, "validating mem resources failed, "
606 "delaying card_add\n");
607 mutex_unlock(&s->ops_mutex);
608 return -EAGAIN; /* try again, but later... */
609 }
610 mutex_unlock(&s->ops_mutex);
611
612 ret = pccard_validate_cis(s, &no_chains);
613 if (ret || !no_chains) {
614 dev_dbg(&s->dev, "invalid CIS or invalid resources\n");
615 return -ENODEV;
616 }
617
618 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
619 no_funcs = mfc.nfn;
620 else
621 no_funcs = 1;
622 s->functions = no_funcs;
623
624 for (i = 0; i < no_funcs; i++)
625 pcmcia_device_add(s, i);
626
627 return ret;
628 }
629
630
631 static int pcmcia_requery_callback(struct device *dev, void * _data)
632 {
633 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
634 if (!p_dev->dev.driver) {
635 dev_dbg(dev, "update device information\n");
636 pcmcia_device_query(p_dev);
637 }
638
639 return 0;
640 }
641
642
643 static void pcmcia_requery(struct pcmcia_socket *s)
644 {
645 int has_pfc;
646
647 if (s->functions == 0) {
648 pcmcia_card_add(s);
649 return;
650 }
651
652 /* some device information might have changed because of a CIS
653 * update or because we can finally read it correctly... so
654 * determine it again, overwriting old values if necessary. */
655 bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery_callback);
656
657 /* if the CIS changed, we need to check whether the number of
658 * functions changed. */
659 if (s->fake_cis) {
660 int old_funcs, new_funcs;
661 cistpl_longlink_mfc_t mfc;
662
663 /* does this cis override add or remove functions? */
664 old_funcs = s->functions;
665
666 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC,
667 &mfc))
668 new_funcs = mfc.nfn;
669 else
670 new_funcs = 1;
671 if (old_funcs != new_funcs) {
672 /* we need to re-start */
673 pcmcia_card_remove(s, NULL);
674 s->functions = 0;
675 pcmcia_card_add(s);
676 }
677 }
678
679 /* If the PCMCIA device consists of two pseudo devices,
680 * call pcmcia_device_add() -- which will fail if both
681 * devices are already registered. */
682 mutex_lock(&s->ops_mutex);
683 has_pfc = s->pcmcia_state.has_pfc;
684 mutex_unlock(&s->ops_mutex);
685 if (has_pfc)
686 pcmcia_device_add(s, 0);
687
688 /* we re-scan all devices, not just the ones connected to this
689 * socket. This does not matter, though. */
690 if (bus_rescan_devices(&pcmcia_bus_type))
691 dev_warn(&s->dev, "rescanning the bus failed\n");
692 }
693
694
695 #ifdef CONFIG_PCMCIA_LOAD_CIS
696
697 /**
698 * pcmcia_load_firmware - load CIS from userspace if device-provided is broken
699 * @dev: the pcmcia device which needs a CIS override
700 * @filename: requested filename in /lib/firmware/
701 *
702 * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if
703 * the one provided by the card is broken. The firmware files reside in
704 * /lib/firmware/ in userspace.
705 */
706 static int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
707 {
708 struct pcmcia_socket *s = dev->socket;
709 const struct firmware *fw;
710 int ret = -ENOMEM;
711 cistpl_longlink_mfc_t mfc;
712 int old_funcs, new_funcs = 1;
713
714 if (!filename)
715 return -EINVAL;
716
717 dev_dbg(&dev->dev, "trying to load CIS file %s\n", filename);
718
719 if (request_firmware(&fw, filename, &dev->dev) == 0) {
720 if (fw->size >= CISTPL_MAX_CIS_SIZE) {
721 ret = -EINVAL;
722 dev_printk(KERN_ERR, &dev->dev,
723 "pcmcia: CIS override is too big\n");
724 goto release;
725 }
726
727 if (!pcmcia_replace_cis(s, fw->data, fw->size))
728 ret = 0;
729 else {
730 dev_printk(KERN_ERR, &dev->dev,
731 "pcmcia: CIS override failed\n");
732 goto release;
733 }
734
735 /* we need to re-start if the number of functions changed */
736 old_funcs = s->functions;
737 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC,
738 &mfc))
739 new_funcs = mfc.nfn;
740
741 if (old_funcs != new_funcs)
742 ret = -EBUSY;
743
744 /* update information */
745 pcmcia_device_query(dev);
746
747 /* requery (as number of functions might have changed) */
748 pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY);
749 }
750 release:
751 release_firmware(fw);
752
753 return ret;
754 }
755
756 #else /* !CONFIG_PCMCIA_LOAD_CIS */
757
758 static inline int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
759 {
760 return -ENODEV;
761 }
762
763 #endif
764
765
766 static inline int pcmcia_devmatch(struct pcmcia_device *dev,
767 struct pcmcia_device_id *did)
768 {
769 if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
770 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
771 return 0;
772 }
773
774 if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
775 if ((!dev->has_card_id) || (dev->card_id != did->card_id))
776 return 0;
777 }
778
779 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
780 if (dev->func != did->function)
781 return 0;
782 }
783
784 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
785 if (!dev->prod_id[0])
786 return 0;
787 if (strcmp(did->prod_id[0], dev->prod_id[0]))
788 return 0;
789 }
790
791 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
792 if (!dev->prod_id[1])
793 return 0;
794 if (strcmp(did->prod_id[1], dev->prod_id[1]))
795 return 0;
796 }
797
798 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
799 if (!dev->prod_id[2])
800 return 0;
801 if (strcmp(did->prod_id[2], dev->prod_id[2]))
802 return 0;
803 }
804
805 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
806 if (!dev->prod_id[3])
807 return 0;
808 if (strcmp(did->prod_id[3], dev->prod_id[3]))
809 return 0;
810 }
811
812 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
813 dev_dbg(&dev->dev, "this is a pseudo-multi-function device\n");
814 mutex_lock(&dev->socket->ops_mutex);
815 dev->socket->pcmcia_state.has_pfc = 1;
816 mutex_unlock(&dev->socket->ops_mutex);
817 if (dev->device_no != did->device_no)
818 return 0;
819 }
820
821 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
822 int ret;
823
824 if ((!dev->has_func_id) || (dev->func_id != did->func_id))
825 return 0;
826
827 /* if this is a pseudo-multi-function device,
828 * we need explicit matches */
829 if (dev->socket->pcmcia_state.has_pfc)
830 return 0;
831 if (dev->device_no)
832 return 0;
833
834 /* also, FUNC_ID matching needs to be activated by userspace
835 * after it has re-checked that there is no possible module
836 * with a prod_id/manf_id/card_id match.
837 */
838 mutex_lock(&dev->socket->ops_mutex);
839 ret = dev->allow_func_id_match;
840 mutex_unlock(&dev->socket->ops_mutex);
841
842 if (!ret) {
843 dev_dbg(&dev->dev,
844 "skipping FUNC_ID match until userspace ACK\n");
845 return 0;
846 }
847 }
848
849 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
850 dev_dbg(&dev->dev, "device needs a fake CIS\n");
851 if (!dev->socket->fake_cis)
852 if (pcmcia_load_firmware(dev, did->cisfile))
853 return 0;
854 }
855
856 if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
857 int i;
858 for (i = 0; i < 4; i++)
859 if (dev->prod_id[i])
860 return 0;
861 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
862 return 0;
863 }
864
865 return 1;
866 }
867
868
869 static int pcmcia_bus_match(struct device *dev, struct device_driver *drv)
870 {
871 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
872 struct pcmcia_driver *p_drv = to_pcmcia_drv(drv);
873 struct pcmcia_device_id *did = p_drv->id_table;
874 struct pcmcia_dynid *dynid;
875
876 /* match dynamic devices first */
877 mutex_lock(&p_drv->dynids.lock);
878 list_for_each_entry(dynid, &p_drv->dynids.list, node) {
879 dev_dbg(dev, "trying to match to %s\n", drv->name);
880 if (pcmcia_devmatch(p_dev, &dynid->id)) {
881 dev_dbg(dev, "matched to %s\n", drv->name);
882 mutex_unlock(&p_drv->dynids.lock);
883 return 1;
884 }
885 }
886 mutex_unlock(&p_drv->dynids.lock);
887
888 #ifdef CONFIG_PCMCIA_IOCTL
889 /* matching by cardmgr */
890 if (p_dev->cardmgr == p_drv) {
891 dev_dbg(dev, "cardmgr matched to %s\n", drv->name);
892 return 1;
893 }
894 #endif
895
896 while (did && did->match_flags) {
897 dev_dbg(dev, "trying to match to %s\n", drv->name);
898 if (pcmcia_devmatch(p_dev, did)) {
899 dev_dbg(dev, "matched to %s\n", drv->name);
900 return 1;
901 }
902 did++;
903 }
904
905 return 0;
906 }
907
908 #ifdef CONFIG_HOTPLUG
909
910 static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
911 {
912 struct pcmcia_device *p_dev;
913 int i;
914 u32 hash[4] = { 0, 0, 0, 0};
915
916 if (!dev)
917 return -ENODEV;
918
919 p_dev = to_pcmcia_dev(dev);
920
921 /* calculate hashes */
922 for (i = 0; i < 4; i++) {
923 if (!p_dev->prod_id[i])
924 continue;
925 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
926 }
927
928 if (add_uevent_var(env, "SOCKET_NO=%u", p_dev->socket->sock))
929 return -ENOMEM;
930
931 if (add_uevent_var(env, "DEVICE_NO=%02X", p_dev->device_no))
932 return -ENOMEM;
933
934 if (add_uevent_var(env, "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
935 "pa%08Xpb%08Xpc%08Xpd%08X",
936 p_dev->has_manf_id ? p_dev->manf_id : 0,
937 p_dev->has_card_id ? p_dev->card_id : 0,
938 p_dev->has_func_id ? p_dev->func_id : 0,
939 p_dev->func,
940 p_dev->device_no,
941 hash[0],
942 hash[1],
943 hash[2],
944 hash[3]))
945 return -ENOMEM;
946
947 return 0;
948 }
949
950 #else
951
952 static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
953 {
954 return -ENODEV;
955 }
956
957 #endif
958
959 /************************ runtime PM support ***************************/
960
961 static int pcmcia_dev_suspend(struct device *dev, pm_message_t state);
962 static int pcmcia_dev_resume(struct device *dev);
963
964 static int runtime_suspend(struct device *dev)
965 {
966 int rc;
967
968 device_lock(dev);
969 rc = pcmcia_dev_suspend(dev, PMSG_SUSPEND);
970 device_unlock(dev);
971 return rc;
972 }
973
974 static int runtime_resume(struct device *dev)
975 {
976 int rc;
977
978 device_lock(dev);
979 rc = pcmcia_dev_resume(dev);
980 device_unlock(dev);
981 return rc;
982 }
983
984 /************************ per-device sysfs output ***************************/
985
986 #define pcmcia_device_attr(field, test, format) \
987 static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf) \
988 { \
989 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
990 return p_dev->test ? sprintf(buf, format, p_dev->field) : -ENODEV; \
991 }
992
993 #define pcmcia_device_stringattr(name, field) \
994 static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf) \
995 { \
996 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
997 return p_dev->field ? sprintf(buf, "%s\n", p_dev->field) : -ENODEV; \
998 }
999
1000 pcmcia_device_attr(func, socket, "0x%02x\n");
1001 pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
1002 pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
1003 pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
1004 pcmcia_device_stringattr(prod_id1, prod_id[0]);
1005 pcmcia_device_stringattr(prod_id2, prod_id[1]);
1006 pcmcia_device_stringattr(prod_id3, prod_id[2]);
1007 pcmcia_device_stringattr(prod_id4, prod_id[3]);
1008
1009
1010 static ssize_t pcmcia_show_pm_state(struct device *dev, struct device_attribute *attr, char *buf)
1011 {
1012 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1013
1014 if (p_dev->suspended)
1015 return sprintf(buf, "off\n");
1016 else
1017 return sprintf(buf, "on\n");
1018 }
1019
1020 static ssize_t pcmcia_store_pm_state(struct device *dev, struct device_attribute *attr,
1021 const char *buf, size_t count)
1022 {
1023 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1024 int ret = 0;
1025
1026 if (!count)
1027 return -EINVAL;
1028
1029 if ((!p_dev->suspended) && !strncmp(buf, "off", 3))
1030 ret = runtime_suspend(dev);
1031 else if (p_dev->suspended && !strncmp(buf, "on", 2))
1032 ret = runtime_resume(dev);
1033
1034 return ret ? ret : count;
1035 }
1036
1037
1038 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1039 {
1040 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1041 int i;
1042 u32 hash[4] = { 0, 0, 0, 0};
1043
1044 /* calculate hashes */
1045 for (i = 0; i < 4; i++) {
1046 if (!p_dev->prod_id[i])
1047 continue;
1048 hash[i] = crc32(0, p_dev->prod_id[i],
1049 strlen(p_dev->prod_id[i]));
1050 }
1051 return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
1052 "pa%08Xpb%08Xpc%08Xpd%08X\n",
1053 p_dev->has_manf_id ? p_dev->manf_id : 0,
1054 p_dev->has_card_id ? p_dev->card_id : 0,
1055 p_dev->has_func_id ? p_dev->func_id : 0,
1056 p_dev->func, p_dev->device_no,
1057 hash[0], hash[1], hash[2], hash[3]);
1058 }
1059
1060 static ssize_t pcmcia_store_allow_func_id_match(struct device *dev,
1061 struct device_attribute *attr, const char *buf, size_t count)
1062 {
1063 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1064
1065 if (!count)
1066 return -EINVAL;
1067
1068 mutex_lock(&p_dev->socket->ops_mutex);
1069 p_dev->allow_func_id_match = 1;
1070 mutex_unlock(&p_dev->socket->ops_mutex);
1071 pcmcia_parse_uevents(p_dev->socket, PCMCIA_UEVENT_REQUERY);
1072
1073 return count;
1074 }
1075
1076 static struct device_attribute pcmcia_dev_attrs[] = {
1077 __ATTR(function, 0444, func_show, NULL),
1078 __ATTR(pm_state, 0644, pcmcia_show_pm_state, pcmcia_store_pm_state),
1079 __ATTR_RO(func_id),
1080 __ATTR_RO(manf_id),
1081 __ATTR_RO(card_id),
1082 __ATTR_RO(prod_id1),
1083 __ATTR_RO(prod_id2),
1084 __ATTR_RO(prod_id3),
1085 __ATTR_RO(prod_id4),
1086 __ATTR_RO(modalias),
1087 __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match),
1088 __ATTR_NULL,
1089 };
1090
1091 /* PM support, also needed for reset */
1092
1093 static int pcmcia_dev_suspend(struct device *dev, pm_message_t state)
1094 {
1095 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1096 struct pcmcia_driver *p_drv = NULL;
1097 int ret = 0;
1098
1099 mutex_lock(&p_dev->socket->ops_mutex);
1100 if (p_dev->suspended) {
1101 mutex_unlock(&p_dev->socket->ops_mutex);
1102 return 0;
1103 }
1104 p_dev->suspended = 1;
1105 mutex_unlock(&p_dev->socket->ops_mutex);
1106
1107 dev_dbg(dev, "suspending\n");
1108
1109 if (dev->driver)
1110 p_drv = to_pcmcia_drv(dev->driver);
1111
1112 if (!p_drv)
1113 goto out;
1114
1115 if (p_drv->suspend) {
1116 ret = p_drv->suspend(p_dev);
1117 if (ret) {
1118 dev_printk(KERN_ERR, dev,
1119 "pcmcia: device %s (driver %s) did "
1120 "not want to go to sleep (%d)\n",
1121 p_dev->devname, p_drv->drv.name, ret);
1122 mutex_lock(&p_dev->socket->ops_mutex);
1123 p_dev->suspended = 0;
1124 mutex_unlock(&p_dev->socket->ops_mutex);
1125 goto out;
1126 }
1127 }
1128
1129 if (p_dev->device_no == p_dev->func) {
1130 dev_dbg(dev, "releasing configuration\n");
1131 pcmcia_release_configuration(p_dev);
1132 }
1133
1134 out:
1135 return ret;
1136 }
1137
1138
1139 static int pcmcia_dev_resume(struct device *dev)
1140 {
1141 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1142 struct pcmcia_driver *p_drv = NULL;
1143 int ret = 0;
1144
1145 mutex_lock(&p_dev->socket->ops_mutex);
1146 if (!p_dev->suspended) {
1147 mutex_unlock(&p_dev->socket->ops_mutex);
1148 return 0;
1149 }
1150 p_dev->suspended = 0;
1151 mutex_unlock(&p_dev->socket->ops_mutex);
1152
1153 dev_dbg(dev, "resuming\n");
1154
1155 if (dev->driver)
1156 p_drv = to_pcmcia_drv(dev->driver);
1157
1158 if (!p_drv)
1159 goto out;
1160
1161 if (p_dev->device_no == p_dev->func) {
1162 dev_dbg(dev, "requesting configuration\n");
1163 ret = pcmcia_request_configuration(p_dev, &p_dev->conf);
1164 if (ret)
1165 goto out;
1166 }
1167
1168 if (p_drv->resume)
1169 ret = p_drv->resume(p_dev);
1170
1171 out:
1172 return ret;
1173 }
1174
1175
1176 static int pcmcia_bus_suspend_callback(struct device *dev, void * _data)
1177 {
1178 struct pcmcia_socket *skt = _data;
1179 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1180
1181 if (p_dev->socket != skt || p_dev->suspended)
1182 return 0;
1183
1184 return runtime_suspend(dev);
1185 }
1186
1187 static int pcmcia_bus_resume_callback(struct device *dev, void * _data)
1188 {
1189 struct pcmcia_socket *skt = _data;
1190 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1191
1192 if (p_dev->socket != skt || !p_dev->suspended)
1193 return 0;
1194
1195 runtime_resume(dev);
1196
1197 return 0;
1198 }
1199
1200 static int pcmcia_bus_resume(struct pcmcia_socket *skt)
1201 {
1202 dev_dbg(&skt->dev, "resuming socket %d\n", skt->sock);
1203 bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback);
1204 return 0;
1205 }
1206
1207 static int pcmcia_bus_suspend(struct pcmcia_socket *skt)
1208 {
1209 dev_dbg(&skt->dev, "suspending socket %d\n", skt->sock);
1210 if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt,
1211 pcmcia_bus_suspend_callback)) {
1212 pcmcia_bus_resume(skt);
1213 return -EIO;
1214 }
1215 return 0;
1216 }
1217
1218
1219 /*======================================================================
1220
1221 The card status event handler.
1222
1223 ======================================================================*/
1224
1225 /* Normally, the event is passed to individual drivers after
1226 * informing userspace. Only for CS_EVENT_CARD_REMOVAL this
1227 * is inversed to maintain historic compatibility.
1228 */
1229
1230 static int ds_event(struct pcmcia_socket *skt, event_t event, int priority)
1231 {
1232 struct pcmcia_socket *s = pcmcia_get_socket(skt);
1233
1234 if (!s) {
1235 dev_printk(KERN_ERR, &skt->dev,
1236 "PCMCIA obtaining reference to socket " \
1237 "failed, event 0x%x lost!\n", event);
1238 return -ENODEV;
1239 }
1240
1241 dev_dbg(&skt->dev, "ds_event(0x%06x, %d, 0x%p)\n",
1242 event, priority, skt);
1243
1244 switch (event) {
1245 case CS_EVENT_CARD_REMOVAL:
1246 atomic_set(&skt->present, 0);
1247 pcmcia_card_remove(skt, NULL);
1248 handle_event(skt, event);
1249 mutex_lock(&s->ops_mutex);
1250 destroy_cis_cache(s);
1251 pcmcia_cleanup_irq(s);
1252 mutex_unlock(&s->ops_mutex);
1253 break;
1254
1255 case CS_EVENT_CARD_INSERTION:
1256 atomic_set(&skt->present, 1);
1257 mutex_lock(&s->ops_mutex);
1258 s->pcmcia_state.has_pfc = 0;
1259 destroy_cis_cache(s); /* to be on the safe side... */
1260 mutex_unlock(&s->ops_mutex);
1261 pcmcia_card_add(skt);
1262 handle_event(skt, event);
1263 break;
1264
1265 case CS_EVENT_EJECTION_REQUEST:
1266 break;
1267
1268 case CS_EVENT_PM_RESUME:
1269 if (verify_cis_cache(skt) != 0) {
1270 dev_dbg(&skt->dev, "cis mismatch - different card\n");
1271 /* first, remove the card */
1272 ds_event(skt, CS_EVENT_CARD_REMOVAL, CS_EVENT_PRI_HIGH);
1273 mutex_lock(&s->ops_mutex);
1274 destroy_cis_cache(skt);
1275 kfree(skt->fake_cis);
1276 skt->fake_cis = NULL;
1277 s->functions = 0;
1278 mutex_unlock(&s->ops_mutex);
1279 /* now, add the new card */
1280 ds_event(skt, CS_EVENT_CARD_INSERTION,
1281 CS_EVENT_PRI_LOW);
1282 }
1283 handle_event(skt, event);
1284 break;
1285
1286 case CS_EVENT_PM_SUSPEND:
1287 case CS_EVENT_RESET_PHYSICAL:
1288 case CS_EVENT_CARD_RESET:
1289 default:
1290 handle_event(skt, event);
1291 break;
1292 }
1293
1294 pcmcia_put_socket(s);
1295
1296 return 0;
1297 } /* ds_event */
1298
1299 /*
1300 * NOTE: This is racy. There's no guarantee the card will still be
1301 * physically present, even if the call to this function returns
1302 * non-NULL. Furthermore, the device driver most likely is unbound
1303 * almost immediately, so the timeframe where pcmcia_dev_present
1304 * returns NULL is probably really really small.
1305 */
1306 struct pcmcia_device *pcmcia_dev_present(struct pcmcia_device *_p_dev)
1307 {
1308 struct pcmcia_device *p_dev;
1309 struct pcmcia_device *ret = NULL;
1310
1311 p_dev = pcmcia_get_dev(_p_dev);
1312 if (!p_dev)
1313 return NULL;
1314
1315 if (atomic_read(&p_dev->socket->present) != 0)
1316 ret = p_dev;
1317
1318 pcmcia_put_dev(p_dev);
1319 return ret;
1320 }
1321 EXPORT_SYMBOL(pcmcia_dev_present);
1322
1323
1324 static struct pcmcia_callback pcmcia_bus_callback = {
1325 .owner = THIS_MODULE,
1326 .event = ds_event,
1327 .requery = pcmcia_requery,
1328 .validate = pccard_validate_cis,
1329 .suspend = pcmcia_bus_suspend,
1330 .resume = pcmcia_bus_resume,
1331 };
1332
1333 static int __devinit pcmcia_bus_add_socket(struct device *dev,
1334 struct class_interface *class_intf)
1335 {
1336 struct pcmcia_socket *socket = dev_get_drvdata(dev);
1337 int ret;
1338
1339 socket = pcmcia_get_socket(socket);
1340 if (!socket) {
1341 dev_printk(KERN_ERR, dev,
1342 "PCMCIA obtaining reference to socket failed\n");
1343 return -ENODEV;
1344 }
1345
1346 ret = sysfs_create_bin_file(&dev->kobj, &pccard_cis_attr);
1347 if (ret) {
1348 dev_printk(KERN_ERR, dev, "PCMCIA registration failed\n");
1349 pcmcia_put_socket(socket);
1350 return ret;
1351 }
1352
1353 #ifdef CONFIG_PCMCIA_IOCTL
1354 init_waitqueue_head(&socket->queue);
1355 #endif
1356 INIT_LIST_HEAD(&socket->devices_list);
1357 memset(&socket->pcmcia_state, 0, sizeof(u8));
1358 socket->device_count = 0;
1359 atomic_set(&socket->present, 0);
1360
1361 ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback);
1362 if (ret) {
1363 dev_printk(KERN_ERR, dev, "PCMCIA registration failed\n");
1364 pcmcia_put_socket(socket);
1365 return ret;
1366 }
1367
1368 return 0;
1369 }
1370
1371 static void pcmcia_bus_remove_socket(struct device *dev,
1372 struct class_interface *class_intf)
1373 {
1374 struct pcmcia_socket *socket = dev_get_drvdata(dev);
1375
1376 if (!socket)
1377 return;
1378
1379 pccard_register_pcmcia(socket, NULL);
1380
1381 /* unregister any unbound devices */
1382 mutex_lock(&socket->skt_mutex);
1383 pcmcia_card_remove(socket, NULL);
1384 release_cis_mem(socket);
1385 mutex_unlock(&socket->skt_mutex);
1386
1387 sysfs_remove_bin_file(&dev->kobj, &pccard_cis_attr);
1388
1389 pcmcia_put_socket(socket);
1390
1391 return;
1392 }
1393
1394
1395 /* the pcmcia_bus_interface is used to handle pcmcia socket devices */
1396 static struct class_interface pcmcia_bus_interface __refdata = {
1397 .class = &pcmcia_socket_class,
1398 .add_dev = &pcmcia_bus_add_socket,
1399 .remove_dev = &pcmcia_bus_remove_socket,
1400 };
1401
1402
1403 struct bus_type pcmcia_bus_type = {
1404 .name = "pcmcia",
1405 .uevent = pcmcia_bus_uevent,
1406 .match = pcmcia_bus_match,
1407 .dev_attrs = pcmcia_dev_attrs,
1408 .probe = pcmcia_device_probe,
1409 .remove = pcmcia_device_remove,
1410 .suspend = pcmcia_dev_suspend,
1411 .resume = pcmcia_dev_resume,
1412 };
1413
1414
1415 static int __init init_pcmcia_bus(void)
1416 {
1417 int ret;
1418
1419 ret = bus_register(&pcmcia_bus_type);
1420 if (ret < 0) {
1421 printk(KERN_WARNING "pcmcia: bus_register error: %d\n", ret);
1422 return ret;
1423 }
1424 ret = class_interface_register(&pcmcia_bus_interface);
1425 if (ret < 0) {
1426 printk(KERN_WARNING
1427 "pcmcia: class_interface_register error: %d\n", ret);
1428 bus_unregister(&pcmcia_bus_type);
1429 return ret;
1430 }
1431
1432 pcmcia_setup_ioctl();
1433
1434 return 0;
1435 }
1436 fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that
1437 * pcmcia_socket_class is already registered */
1438
1439
1440 static void __exit exit_pcmcia_bus(void)
1441 {
1442 pcmcia_cleanup_ioctl();
1443
1444 class_interface_unregister(&pcmcia_bus_interface);
1445
1446 bus_unregister(&pcmcia_bus_type);
1447 }
1448 module_exit(exit_pcmcia_bus);
1449
1450
1451 MODULE_ALIAS("ds");
kernel-based virtual machine