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drivers: pcmcia: ds.c fix checkpatch errors
[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 - 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/cistpl.h>
30 #include <pcmcia/ds.h>
31 #include <pcmcia/ss.h>
32
33 #include "cs_internal.h"
34
35 /*====================================================================*/
36
37 /* Module parameters */
38
39 MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
40 MODULE_DESCRIPTION("PCMCIA Driver Services");
41 MODULE_LICENSE("GPL");
42
43
44 /*====================================================================*/
45
46 static void pcmcia_check_driver(struct pcmcia_driver *p_drv)
47 {
48 const struct pcmcia_device_id *did = p_drv->id_table;
49 unsigned int i;
50 u32 hash;
51
52 if (!p_drv->probe || !p_drv->remove)
53 printk(KERN_DEBUG "pcmcia: %s lacks a requisite callback "
54 "function\n", p_drv->name);
55
56 while (did && did->match_flags) {
57 for (i = 0; i < 4; i++) {
58 if (!did->prod_id[i])
59 continue;
60
61 hash = crc32(0, did->prod_id[i], strlen(did->prod_id[i]));
62 if (hash == did->prod_id_hash[i])
63 continue;
64
65 printk(KERN_DEBUG "pcmcia: %s: invalid hash for "
66 "product string \"%s\": is 0x%x, should "
67 "be 0x%x\n", p_drv->name, did->prod_id[i],
68 did->prod_id_hash[i], hash);
69 printk(KERN_DEBUG "pcmcia: see "
70 "Documentation/pcmcia/devicetable.txt for "
71 "details\n");
72 }
73 did++;
74 }
75
76 return;
77 }
78
79
80 /*======================================================================*/
81
82
83 struct pcmcia_dynid {
84 struct list_head node;
85 struct pcmcia_device_id id;
86 };
87
88 /**
89 * pcmcia_store_new_id - add a new PCMCIA device ID to this driver and re-probe devices
90 * @driver: target device driver
91 * @buf: buffer for scanning device ID data
92 * @count: input size
93 *
94 * Adds a new dynamic PCMCIA device ID to this driver,
95 * and causes the driver to probe for all devices again.
96 */
97 static ssize_t
98 pcmcia_store_new_id(struct device_driver *driver, const char *buf, size_t count)
99 {
100 struct pcmcia_dynid *dynid;
101 struct pcmcia_driver *pdrv = to_pcmcia_drv(driver);
102 __u16 match_flags, manf_id, card_id;
103 __u8 func_id, function, device_no;
104 __u32 prod_id_hash[4] = {0, 0, 0, 0};
105 int fields = 0;
106 int retval = 0;
107
108 fields = sscanf(buf, "%hx %hx %hx %hhx %hhx %hhx %x %x %x %x",
109 &match_flags, &manf_id, &card_id, &func_id, &function, &device_no,
110 &prod_id_hash[0], &prod_id_hash[1], &prod_id_hash[2], &prod_id_hash[3]);
111 if (fields < 6)
112 return -EINVAL;
113
114 dynid = kzalloc(sizeof(struct pcmcia_dynid), GFP_KERNEL);
115 if (!dynid)
116 return -ENOMEM;
117
118 dynid->id.match_flags = match_flags;
119 dynid->id.manf_id = manf_id;
120 dynid->id.card_id = card_id;
121 dynid->id.func_id = func_id;
122 dynid->id.function = function;
123 dynid->id.device_no = device_no;
124 memcpy(dynid->id.prod_id_hash, prod_id_hash, sizeof(__u32) * 4);
125
126 mutex_lock(&pdrv->dynids.lock);
127 list_add_tail(&dynid->node, &pdrv->dynids.list);
128 mutex_unlock(&pdrv->dynids.lock);
129
130 retval = driver_attach(&pdrv->drv);
131
132 if (retval)
133 return retval;
134 return count;
135 }
136 static DRIVER_ATTR(new_id, S_IWUSR, NULL, pcmcia_store_new_id);
137
138 static void
139 pcmcia_free_dynids(struct pcmcia_driver *drv)
140 {
141 struct pcmcia_dynid *dynid, *n;
142
143 mutex_lock(&drv->dynids.lock);
144 list_for_each_entry_safe(dynid, n, &drv->dynids.list, node) {
145 list_del(&dynid->node);
146 kfree(dynid);
147 }
148 mutex_unlock(&drv->dynids.lock);
149 }
150
151 static int
152 pcmcia_create_newid_file(struct pcmcia_driver *drv)
153 {
154 int error = 0;
155 if (drv->probe != NULL)
156 error = driver_create_file(&drv->drv, &driver_attr_new_id);
157 return error;
158 }
159
160 static void
161 pcmcia_remove_newid_file(struct pcmcia_driver *drv)
162 {
163 driver_remove_file(&drv->drv, &driver_attr_new_id);
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 driver->drv.name = driver->name;
185 mutex_init(&driver->dynids.lock);
186 INIT_LIST_HEAD(&driver->dynids.list);
187
188 pr_debug("registering driver %s\n", driver->name);
189
190 error = driver_register(&driver->drv);
191 if (error < 0)
192 return error;
193
194 error = pcmcia_create_newid_file(driver);
195 if (error)
196 driver_unregister(&driver->drv);
197
198 return error;
199 }
200 EXPORT_SYMBOL(pcmcia_register_driver);
201
202 /**
203 * pcmcia_unregister_driver - unregister a PCMCIA driver with the bus core
204 * @driver: the &driver being unregistered
205 */
206 void pcmcia_unregister_driver(struct pcmcia_driver *driver)
207 {
208 pr_debug("unregistering driver %s\n", driver->name);
209 pcmcia_remove_newid_file(driver);
210 driver_unregister(&driver->drv);
211 pcmcia_free_dynids(driver);
212 }
213 EXPORT_SYMBOL(pcmcia_unregister_driver);
214
215
216 /* pcmcia_device handling */
217
218 static struct pcmcia_device *pcmcia_get_dev(struct pcmcia_device *p_dev)
219 {
220 struct device *tmp_dev;
221 tmp_dev = get_device(&p_dev->dev);
222 if (!tmp_dev)
223 return NULL;
224 return to_pcmcia_dev(tmp_dev);
225 }
226
227 static void pcmcia_put_dev(struct pcmcia_device *p_dev)
228 {
229 if (p_dev)
230 put_device(&p_dev->dev);
231 }
232
233 static void pcmcia_release_function(struct kref *ref)
234 {
235 struct config_t *c = container_of(ref, struct config_t, ref);
236 pr_debug("releasing config_t\n");
237 kfree(c);
238 }
239
240 static void pcmcia_release_dev(struct device *dev)
241 {
242 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
243 int i;
244 dev_dbg(dev, "releasing device\n");
245 pcmcia_put_socket(p_dev->socket);
246 for (i = 0; i < 4; i++)
247 kfree(p_dev->prod_id[i]);
248 kfree(p_dev->devname);
249 kref_put(&p_dev->function_config->ref, pcmcia_release_function);
250 kfree(p_dev);
251 }
252
253
254 static int pcmcia_device_probe(struct device *dev)
255 {
256 struct pcmcia_device *p_dev;
257 struct pcmcia_driver *p_drv;
258 struct pcmcia_socket *s;
259 cistpl_config_t cis_config;
260 int ret = 0;
261
262 dev = get_device(dev);
263 if (!dev)
264 return -ENODEV;
265
266 p_dev = to_pcmcia_dev(dev);
267 p_drv = to_pcmcia_drv(dev->driver);
268 s = p_dev->socket;
269
270 dev_dbg(dev, "trying to bind to %s\n", p_drv->name);
271
272 if ((!p_drv->probe) || (!p_dev->function_config) ||
273 (!try_module_get(p_drv->owner))) {
274 ret = -EINVAL;
275 goto put_dev;
276 }
277
278 /* set up some more device information */
279 ret = pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_CONFIG,
280 &cis_config);
281 if (!ret) {
282 p_dev->config_base = cis_config.base;
283 p_dev->config_regs = cis_config.rmask[0];
284 dev_dbg(dev, "base %x, regs %x", p_dev->config_base,
285 p_dev->config_regs);
286 } else {
287 dev_printk(KERN_INFO, dev,
288 "pcmcia: could not parse base and rmask0 of CIS\n");
289 p_dev->config_base = 0;
290 p_dev->config_regs = 0;
291 }
292
293 ret = p_drv->probe(p_dev);
294 if (ret) {
295 dev_dbg(dev, "binding to %s failed with %d\n",
296 p_drv->name, ret);
297 goto put_module;
298 }
299 dev_dbg(dev, "%s bound: Vpp %d.%d, idx %x, IRQ %d", p_drv->name,
300 p_dev->vpp/10, p_dev->vpp%10, p_dev->config_index, p_dev->irq);
301 dev_dbg(dev, "resources: ioport %pR %pR iomem %pR %pR %pR",
302 p_dev->resource[0], p_dev->resource[1], p_dev->resource[2],
303 p_dev->resource[3], p_dev->resource[4]);
304
305 mutex_lock(&s->ops_mutex);
306 if ((s->pcmcia_pfc) &&
307 (p_dev->socket->device_count == 1) && (p_dev->device_no == 0))
308 pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY);
309 mutex_unlock(&s->ops_mutex);
310
311 put_module:
312 if (ret)
313 module_put(p_drv->owner);
314 put_dev:
315 if (ret)
316 put_device(dev);
317 return ret;
318 }
319
320
321 /*
322 * Removes a PCMCIA card from the device tree and socket list.
323 */
324 static void pcmcia_card_remove(struct pcmcia_socket *s, struct pcmcia_device *leftover)
325 {
326 struct pcmcia_device *p_dev;
327 struct pcmcia_device *tmp;
328
329 dev_dbg(leftover ? &leftover->dev : &s->dev,
330 "pcmcia_card_remove(%d) %s\n", s->sock,
331 leftover ? leftover->devname : "");
332
333 mutex_lock(&s->ops_mutex);
334 if (!leftover)
335 s->device_count = 0;
336 else
337 s->device_count = 1;
338 mutex_unlock(&s->ops_mutex);
339
340 /* unregister all pcmcia_devices registered with this socket, except leftover */
341 list_for_each_entry_safe(p_dev, tmp, &s->devices_list, socket_device_list) {
342 if (p_dev == leftover)
343 continue;
344
345 mutex_lock(&s->ops_mutex);
346 list_del(&p_dev->socket_device_list);
347 mutex_unlock(&s->ops_mutex);
348
349 dev_dbg(&p_dev->dev, "unregistering device\n");
350 device_unregister(&p_dev->dev);
351 }
352
353 return;
354 }
355
356 static int pcmcia_device_remove(struct device *dev)
357 {
358 struct pcmcia_device *p_dev;
359 struct pcmcia_driver *p_drv;
360 int i;
361
362 p_dev = to_pcmcia_dev(dev);
363 p_drv = to_pcmcia_drv(dev->driver);
364
365 dev_dbg(dev, "removing device\n");
366
367 /* If we're removing the primary module driving a
368 * pseudo multi-function card, we need to unbind
369 * all devices
370 */
371 if ((p_dev->socket->pcmcia_pfc) &&
372 (p_dev->socket->device_count > 0) &&
373 (p_dev->device_no == 0))
374 pcmcia_card_remove(p_dev->socket, p_dev);
375
376 /* detach the "instance" */
377 if (!p_drv)
378 return 0;
379
380 if (p_drv->remove)
381 p_drv->remove(p_dev);
382
383 /* check for proper unloading */
384 if (p_dev->_irq || p_dev->_io || p_dev->_locked)
385 dev_printk(KERN_INFO, dev,
386 "pcmcia: driver %s did not release config properly\n",
387 p_drv->name);
388
389 for (i = 0; i < MAX_WIN; i++)
390 if (p_dev->_win & CLIENT_WIN_REQ(i))
391 dev_printk(KERN_INFO, dev,
392 "pcmcia: driver %s did not release window properly\n",
393 p_drv->name);
394
395 /* references from pcmcia_probe_device */
396 pcmcia_put_dev(p_dev);
397 module_put(p_drv->owner);
398
399 return 0;
400 }
401
402
403 /*
404 * pcmcia_device_query -- determine information about a pcmcia device
405 */
406 static int pcmcia_device_query(struct pcmcia_device *p_dev)
407 {
408 cistpl_manfid_t manf_id;
409 cistpl_funcid_t func_id;
410 cistpl_vers_1_t *vers1;
411 unsigned int i;
412
413 vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL);
414 if (!vers1)
415 return -ENOMEM;
416
417 if (!pccard_read_tuple(p_dev->socket, BIND_FN_ALL,
418 CISTPL_MANFID, &manf_id)) {
419 mutex_lock(&p_dev->socket->ops_mutex);
420 p_dev->manf_id = manf_id.manf;
421 p_dev->card_id = manf_id.card;
422 p_dev->has_manf_id = 1;
423 p_dev->has_card_id = 1;
424 mutex_unlock(&p_dev->socket->ops_mutex);
425 }
426
427 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
428 CISTPL_FUNCID, &func_id)) {
429 mutex_lock(&p_dev->socket->ops_mutex);
430 p_dev->func_id = func_id.func;
431 p_dev->has_func_id = 1;
432 mutex_unlock(&p_dev->socket->ops_mutex);
433 } else {
434 /* rule of thumb: cards with no FUNCID, but with
435 * common memory device geometry information, are
436 * probably memory cards (from pcmcia-cs) */
437 cistpl_device_geo_t *devgeo;
438
439 devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL);
440 if (!devgeo) {
441 kfree(vers1);
442 return -ENOMEM;
443 }
444 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
445 CISTPL_DEVICE_GEO, devgeo)) {
446 dev_dbg(&p_dev->dev,
447 "mem device geometry probably means "
448 "FUNCID_MEMORY\n");
449 mutex_lock(&p_dev->socket->ops_mutex);
450 p_dev->func_id = CISTPL_FUNCID_MEMORY;
451 p_dev->has_func_id = 1;
452 mutex_unlock(&p_dev->socket->ops_mutex);
453 }
454 kfree(devgeo);
455 }
456
457 if (!pccard_read_tuple(p_dev->socket, BIND_FN_ALL, CISTPL_VERS_1,
458 vers1)) {
459 mutex_lock(&p_dev->socket->ops_mutex);
460 for (i = 0; i < min_t(unsigned int, 4, vers1->ns); i++) {
461 char *tmp;
462 unsigned int length;
463 char *new;
464
465 tmp = vers1->str + vers1->ofs[i];
466
467 length = strlen(tmp) + 1;
468 if ((length < 2) || (length > 255))
469 continue;
470
471 new = kmalloc(sizeof(char) * length, GFP_KERNEL);
472 if (!new)
473 continue;
474
475 new = strncpy(new, tmp, length);
476
477 tmp = p_dev->prod_id[i];
478 p_dev->prod_id[i] = new;
479 kfree(tmp);
480 }
481 mutex_unlock(&p_dev->socket->ops_mutex);
482 }
483
484 kfree(vers1);
485 return 0;
486 }
487
488
489 static struct pcmcia_device *pcmcia_device_add(struct pcmcia_socket *s,
490 unsigned int function)
491 {
492 struct pcmcia_device *p_dev, *tmp_dev;
493 int i;
494
495 s = pcmcia_get_socket(s);
496 if (!s)
497 return NULL;
498
499 pr_debug("adding device to %d, function %d\n", s->sock, function);
500
501 p_dev = kzalloc(sizeof(struct pcmcia_device), GFP_KERNEL);
502 if (!p_dev)
503 goto err_put;
504
505 mutex_lock(&s->ops_mutex);
506 p_dev->device_no = (s->device_count++);
507 mutex_unlock(&s->ops_mutex);
508
509 /* max of 2 PFC devices */
510 if ((p_dev->device_no >= 2) && (function == 0))
511 goto err_free;
512
513 /* max of 4 devices overall */
514 if (p_dev->device_no >= 4)
515 goto err_free;
516
517 p_dev->socket = s;
518 p_dev->func = function;
519
520 p_dev->dev.bus = &pcmcia_bus_type;
521 p_dev->dev.parent = s->dev.parent;
522 p_dev->dev.release = pcmcia_release_dev;
523 /* by default don't allow DMA */
524 p_dev->dma_mask = DMA_MASK_NONE;
525 p_dev->dev.dma_mask = &p_dev->dma_mask;
526 dev_set_name(&p_dev->dev, "%d.%d", p_dev->socket->sock, p_dev->device_no);
527 if (!dev_name(&p_dev->dev))
528 goto err_free;
529 p_dev->devname = kasprintf(GFP_KERNEL, "pcmcia%s", dev_name(&p_dev->dev));
530 if (!p_dev->devname)
531 goto err_free;
532 dev_dbg(&p_dev->dev, "devname is %s\n", p_dev->devname);
533
534 mutex_lock(&s->ops_mutex);
535
536 /*
537 * p_dev->function_config must be the same for all card functions.
538 * Note that this is serialized by ops_mutex, so that only one
539 * such struct will be created.
540 */
541 list_for_each_entry(tmp_dev, &s->devices_list, socket_device_list)
542 if (p_dev->func == tmp_dev->func) {
543 p_dev->function_config = tmp_dev->function_config;
544 p_dev->irq = tmp_dev->irq;
545 kref_get(&p_dev->function_config->ref);
546 }
547
548 /* Add to the list in pcmcia_bus_socket */
549 list_add(&p_dev->socket_device_list, &s->devices_list);
550
551 if (pcmcia_setup_irq(p_dev))
552 dev_warn(&p_dev->dev,
553 "IRQ setup failed -- device might not work\n");
554
555 if (!p_dev->function_config) {
556 config_t *c;
557 dev_dbg(&p_dev->dev, "creating config_t\n");
558 c = kzalloc(sizeof(struct config_t), GFP_KERNEL);
559 if (!c) {
560 mutex_unlock(&s->ops_mutex);
561 goto err_unreg;
562 }
563 p_dev->function_config = c;
564 kref_init(&c->ref);
565 for (i = 0; i < MAX_IO_WIN; i++) {
566 c->io[i].name = p_dev->devname;
567 c->io[i].flags = IORESOURCE_IO;
568 }
569 for (i = 0; i < MAX_WIN; i++) {
570 c->mem[i].name = p_dev->devname;
571 c->mem[i].flags = IORESOURCE_MEM;
572 }
573 }
574 for (i = 0; i < MAX_IO_WIN; i++)
575 p_dev->resource[i] = &p_dev->function_config->io[i];
576 for (; i < (MAX_IO_WIN + MAX_WIN); i++)
577 p_dev->resource[i] = &p_dev->function_config->mem[i-MAX_IO_WIN];
578
579 mutex_unlock(&s->ops_mutex);
580
581 dev_printk(KERN_NOTICE, &p_dev->dev,
582 "pcmcia: registering new device %s (IRQ: %d)\n",
583 p_dev->devname, p_dev->irq);
584
585 pcmcia_device_query(p_dev);
586
587 if (device_register(&p_dev->dev))
588 goto err_unreg;
589
590 return p_dev;
591
592 err_unreg:
593 mutex_lock(&s->ops_mutex);
594 list_del(&p_dev->socket_device_list);
595 mutex_unlock(&s->ops_mutex);
596
597 err_free:
598 mutex_lock(&s->ops_mutex);
599 s->device_count--;
600 mutex_unlock(&s->ops_mutex);
601
602 for (i = 0; i < 4; i++)
603 kfree(p_dev->prod_id[i]);
604 kfree(p_dev->devname);
605 kfree(p_dev);
606 err_put:
607 pcmcia_put_socket(s);
608
609 return NULL;
610 }
611
612
613 static int pcmcia_card_add(struct pcmcia_socket *s)
614 {
615 cistpl_longlink_mfc_t mfc;
616 unsigned int no_funcs, i, no_chains;
617 int ret = -EAGAIN;
618
619 mutex_lock(&s->ops_mutex);
620 if (!(s->resource_setup_done)) {
621 dev_dbg(&s->dev,
622 "no resources available, delaying card_add\n");
623 mutex_unlock(&s->ops_mutex);
624 return -EAGAIN; /* try again, but later... */
625 }
626
627 if (pcmcia_validate_mem(s)) {
628 dev_dbg(&s->dev, "validating mem resources failed, "
629 "delaying card_add\n");
630 mutex_unlock(&s->ops_mutex);
631 return -EAGAIN; /* try again, but later... */
632 }
633 mutex_unlock(&s->ops_mutex);
634
635 ret = pccard_validate_cis(s, &no_chains);
636 if (ret || !no_chains) {
637 dev_dbg(&s->dev, "invalid CIS or invalid resources\n");
638 return -ENODEV;
639 }
640
641 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
642 no_funcs = mfc.nfn;
643 else
644 no_funcs = 1;
645 s->functions = no_funcs;
646
647 for (i = 0; i < no_funcs; i++)
648 pcmcia_device_add(s, i);
649
650 return ret;
651 }
652
653
654 static int pcmcia_requery_callback(struct device *dev, void *_data)
655 {
656 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
657 if (!p_dev->dev.driver) {
658 dev_dbg(dev, "update device information\n");
659 pcmcia_device_query(p_dev);
660 }
661
662 return 0;
663 }
664
665
666 static void pcmcia_requery(struct pcmcia_socket *s)
667 {
668 int has_pfc;
669
670 if (!(s->state & SOCKET_PRESENT))
671 return;
672
673 if (s->functions == 0) {
674 pcmcia_card_add(s);
675 return;
676 }
677
678 /* some device information might have changed because of a CIS
679 * update or because we can finally read it correctly... so
680 * determine it again, overwriting old values if necessary. */
681 bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery_callback);
682
683 /* if the CIS changed, we need to check whether the number of
684 * functions changed. */
685 if (s->fake_cis) {
686 int old_funcs, new_funcs;
687 cistpl_longlink_mfc_t mfc;
688
689 /* does this cis override add or remove functions? */
690 old_funcs = s->functions;
691
692 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC,
693 &mfc))
694 new_funcs = mfc.nfn;
695 else
696 new_funcs = 1;
697 if (old_funcs != new_funcs) {
698 /* we need to re-start */
699 pcmcia_card_remove(s, NULL);
700 s->functions = 0;
701 pcmcia_card_add(s);
702 }
703 }
704
705 /* If the PCMCIA device consists of two pseudo devices,
706 * call pcmcia_device_add() -- which will fail if both
707 * devices are already registered. */
708 mutex_lock(&s->ops_mutex);
709 has_pfc = s->pcmcia_pfc;
710 mutex_unlock(&s->ops_mutex);
711 if (has_pfc)
712 pcmcia_device_add(s, 0);
713
714 /* we re-scan all devices, not just the ones connected to this
715 * socket. This does not matter, though. */
716 if (bus_rescan_devices(&pcmcia_bus_type))
717 dev_warn(&s->dev, "rescanning the bus failed\n");
718 }
719
720
721 #ifdef CONFIG_PCMCIA_LOAD_CIS
722
723 /**
724 * pcmcia_load_firmware - load CIS from userspace if device-provided is broken
725 * @dev: the pcmcia device which needs a CIS override
726 * @filename: requested filename in /lib/firmware/
727 *
728 * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if
729 * the one provided by the card is broken. The firmware files reside in
730 * /lib/firmware/ in userspace.
731 */
732 static int pcmcia_load_firmware(struct pcmcia_device *dev, char *filename)
733 {
734 struct pcmcia_socket *s = dev->socket;
735 const struct firmware *fw;
736 int ret = -ENOMEM;
737 cistpl_longlink_mfc_t mfc;
738 int old_funcs, new_funcs = 1;
739
740 if (!filename)
741 return -EINVAL;
742
743 dev_dbg(&dev->dev, "trying to load CIS file %s\n", filename);
744
745 if (request_firmware(&fw, filename, &dev->dev) == 0) {
746 if (fw->size >= CISTPL_MAX_CIS_SIZE) {
747 ret = -EINVAL;
748 dev_printk(KERN_ERR, &dev->dev,
749 "pcmcia: CIS override is too big\n");
750 goto release;
751 }
752
753 if (!pcmcia_replace_cis(s, fw->data, fw->size))
754 ret = 0;
755 else {
756 dev_printk(KERN_ERR, &dev->dev,
757 "pcmcia: CIS override failed\n");
758 goto release;
759 }
760
761 /* we need to re-start if the number of functions changed */
762 old_funcs = s->functions;
763 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC,
764 &mfc))
765 new_funcs = mfc.nfn;
766
767 if (old_funcs != new_funcs)
768 ret = -EBUSY;
769
770 /* update information */
771 pcmcia_device_query(dev);
772
773 /* requery (as number of functions might have changed) */
774 pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY);
775 }
776 release:
777 release_firmware(fw);
778
779 return ret;
780 }
781
782 #else /* !CONFIG_PCMCIA_LOAD_CIS */
783
784 static inline int pcmcia_load_firmware(struct pcmcia_device *dev,
785 char *filename)
786 {
787 return -ENODEV;
788 }
789
790 #endif
791
792
793 static inline int pcmcia_devmatch(struct pcmcia_device *dev,
794 const struct pcmcia_device_id *did)
795 {
796 if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
797 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
798 return 0;
799 }
800
801 if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
802 if ((!dev->has_card_id) || (dev->card_id != did->card_id))
803 return 0;
804 }
805
806 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
807 if (dev->func != did->function)
808 return 0;
809 }
810
811 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
812 if (!dev->prod_id[0])
813 return 0;
814 if (strcmp(did->prod_id[0], dev->prod_id[0]))
815 return 0;
816 }
817
818 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
819 if (!dev->prod_id[1])
820 return 0;
821 if (strcmp(did->prod_id[1], dev->prod_id[1]))
822 return 0;
823 }
824
825 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
826 if (!dev->prod_id[2])
827 return 0;
828 if (strcmp(did->prod_id[2], dev->prod_id[2]))
829 return 0;
830 }
831
832 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
833 if (!dev->prod_id[3])
834 return 0;
835 if (strcmp(did->prod_id[3], dev->prod_id[3]))
836 return 0;
837 }
838
839 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
840 dev_dbg(&dev->dev, "this is a pseudo-multi-function device\n");
841 mutex_lock(&dev->socket->ops_mutex);
842 dev->socket->pcmcia_pfc = 1;
843 mutex_unlock(&dev->socket->ops_mutex);
844 if (dev->device_no != did->device_no)
845 return 0;
846 }
847
848 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
849 int ret;
850
851 if ((!dev->has_func_id) || (dev->func_id != did->func_id))
852 return 0;
853
854 /* if this is a pseudo-multi-function device,
855 * we need explicit matches */
856 if (dev->socket->pcmcia_pfc)
857 return 0;
858 if (dev->device_no)
859 return 0;
860
861 /* also, FUNC_ID matching needs to be activated by userspace
862 * after it has re-checked that there is no possible module
863 * with a prod_id/manf_id/card_id match.
864 */
865 mutex_lock(&dev->socket->ops_mutex);
866 ret = dev->allow_func_id_match;
867 mutex_unlock(&dev->socket->ops_mutex);
868
869 if (!ret) {
870 dev_dbg(&dev->dev,
871 "skipping FUNC_ID match until userspace ACK\n");
872 return 0;
873 }
874 }
875
876 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
877 dev_dbg(&dev->dev, "device needs a fake CIS\n");
878 if (!dev->socket->fake_cis)
879 if (pcmcia_load_firmware(dev, did->cisfile))
880 return 0;
881 }
882
883 if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
884 int i;
885 for (i = 0; i < 4; i++)
886 if (dev->prod_id[i])
887 return 0;
888 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
889 return 0;
890 }
891
892 return 1;
893 }
894
895
896 static int pcmcia_bus_match(struct device *dev, struct device_driver *drv)
897 {
898 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
899 struct pcmcia_driver *p_drv = to_pcmcia_drv(drv);
900 const struct pcmcia_device_id *did = p_drv->id_table;
901 struct pcmcia_dynid *dynid;
902
903 /* match dynamic devices first */
904 mutex_lock(&p_drv->dynids.lock);
905 list_for_each_entry(dynid, &p_drv->dynids.list, node) {
906 dev_dbg(dev, "trying to match to %s\n", drv->name);
907 if (pcmcia_devmatch(p_dev, &dynid->id)) {
908 dev_dbg(dev, "matched to %s\n", drv->name);
909 mutex_unlock(&p_drv->dynids.lock);
910 return 1;
911 }
912 }
913 mutex_unlock(&p_drv->dynids.lock);
914
915 while (did && did->match_flags) {
916 dev_dbg(dev, "trying to match to %s\n", drv->name);
917 if (pcmcia_devmatch(p_dev, did)) {
918 dev_dbg(dev, "matched to %s\n", drv->name);
919 return 1;
920 }
921 did++;
922 }
923
924 return 0;
925 }
926
927 static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
928 {
929 struct pcmcia_device *p_dev;
930 int i;
931 u32 hash[4] = { 0, 0, 0, 0};
932
933 if (!dev)
934 return -ENODEV;
935
936 p_dev = to_pcmcia_dev(dev);
937
938 /* calculate hashes */
939 for (i = 0; i < 4; i++) {
940 if (!p_dev->prod_id[i])
941 continue;
942 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
943 }
944
945 if (add_uevent_var(env, "SOCKET_NO=%u", p_dev->socket->sock))
946 return -ENOMEM;
947
948 if (add_uevent_var(env, "DEVICE_NO=%02X", p_dev->device_no))
949 return -ENOMEM;
950
951 if (add_uevent_var(env, "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
952 "pa%08Xpb%08Xpc%08Xpd%08X",
953 p_dev->has_manf_id ? p_dev->manf_id : 0,
954 p_dev->has_card_id ? p_dev->card_id : 0,
955 p_dev->has_func_id ? p_dev->func_id : 0,
956 p_dev->func,
957 p_dev->device_no,
958 hash[0],
959 hash[1],
960 hash[2],
961 hash[3]))
962 return -ENOMEM;
963
964 return 0;
965 }
966
967 /************************ runtime PM support ***************************/
968
969 static int pcmcia_dev_suspend(struct device *dev, pm_message_t state);
970 static int pcmcia_dev_resume(struct device *dev);
971
972 static int runtime_suspend(struct device *dev)
973 {
974 int rc;
975
976 device_lock(dev);
977 rc = pcmcia_dev_suspend(dev, PMSG_SUSPEND);
978 device_unlock(dev);
979 return rc;
980 }
981
982 static int runtime_resume(struct device *dev)
983 {
984 int rc;
985
986 device_lock(dev);
987 rc = pcmcia_dev_resume(dev);
988 device_unlock(dev);
989 return rc;
990 }
991
992 /************************ per-device sysfs output ***************************/
993
994 #define pcmcia_device_attr(field, test, format) \
995 static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf) \
996 { \
997 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
998 return p_dev->test ? sprintf(buf, format, p_dev->field) : -ENODEV; \
999 } \
1000 static DEVICE_ATTR_RO(field);
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 static DEVICE_ATTR_RO(name);
1009
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 static ssize_t function_show(struct device *dev, struct device_attribute *attr,
1019 char *buf)
1020 {
1021 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1022 return p_dev->socket ? sprintf(buf, "0x%02x\n", p_dev->func) : -ENODEV;
1023 }
1024 static DEVICE_ATTR_RO(function);
1025
1026 static ssize_t resources_show(struct device *dev,
1027 struct device_attribute *attr, char *buf)
1028 {
1029 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1030 char *str = buf;
1031 int i;
1032
1033 for (i = 0; i < PCMCIA_NUM_RESOURCES; i++)
1034 str += sprintf(str, "%pr\n", p_dev->resource[i]);
1035
1036 return str - buf;
1037 }
1038 static DEVICE_ATTR_RO(resources);
1039
1040 static ssize_t pm_state_show(struct device *dev, struct device_attribute *attr, char *buf)
1041 {
1042 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1043
1044 if (p_dev->suspended)
1045 return sprintf(buf, "off\n");
1046 else
1047 return sprintf(buf, "on\n");
1048 }
1049
1050 static ssize_t pm_state_store(struct device *dev, struct device_attribute *attr,
1051 const char *buf, size_t count)
1052 {
1053 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1054 int ret = 0;
1055
1056 if (!count)
1057 return -EINVAL;
1058
1059 if ((!p_dev->suspended) && !strncmp(buf, "off", 3))
1060 ret = runtime_suspend(dev);
1061 else if (p_dev->suspended && !strncmp(buf, "on", 2))
1062 ret = runtime_resume(dev);
1063
1064 return ret ? ret : count;
1065 }
1066 static DEVICE_ATTR_RW(pm_state);
1067
1068 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1069 {
1070 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1071 int i;
1072 u32 hash[4] = { 0, 0, 0, 0};
1073
1074 /* calculate hashes */
1075 for (i = 0; i < 4; i++) {
1076 if (!p_dev->prod_id[i])
1077 continue;
1078 hash[i] = crc32(0, p_dev->prod_id[i],
1079 strlen(p_dev->prod_id[i]));
1080 }
1081 return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
1082 "pa%08Xpb%08Xpc%08Xpd%08X\n",
1083 p_dev->has_manf_id ? p_dev->manf_id : 0,
1084 p_dev->has_card_id ? p_dev->card_id : 0,
1085 p_dev->has_func_id ? p_dev->func_id : 0,
1086 p_dev->func, p_dev->device_no,
1087 hash[0], hash[1], hash[2], hash[3]);
1088 }
1089 static DEVICE_ATTR_RO(modalias);
1090
1091 static ssize_t allow_func_id_match_store(struct device *dev,
1092 struct device_attribute *attr, const char *buf, size_t count)
1093 {
1094 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1095
1096 if (!count)
1097 return -EINVAL;
1098
1099 mutex_lock(&p_dev->socket->ops_mutex);
1100 p_dev->allow_func_id_match = 1;
1101 mutex_unlock(&p_dev->socket->ops_mutex);
1102 pcmcia_parse_uevents(p_dev->socket, PCMCIA_UEVENT_REQUERY);
1103
1104 return count;
1105 }
1106 static DEVICE_ATTR_WO(allow_func_id_match);
1107
1108 static struct attribute *pcmcia_dev_attrs[] = {
1109 &dev_attr_resources.attr,
1110 &dev_attr_pm_state.attr,
1111 &dev_attr_function.attr,
1112 &dev_attr_func_id.attr,
1113 &dev_attr_manf_id.attr,
1114 &dev_attr_card_id.attr,
1115 &dev_attr_prod_id1.attr,
1116 &dev_attr_prod_id2.attr,
1117 &dev_attr_prod_id3.attr,
1118 &dev_attr_prod_id4.attr,
1119 &dev_attr_modalias.attr,
1120 &dev_attr_allow_func_id_match.attr,
1121 NULL,
1122 };
1123 ATTRIBUTE_GROUPS(pcmcia_dev);
1124
1125 /* PM support, also needed for reset */
1126
1127 static int pcmcia_dev_suspend(struct device *dev, pm_message_t state)
1128 {
1129 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1130 struct pcmcia_driver *p_drv = NULL;
1131 int ret = 0;
1132
1133 mutex_lock(&p_dev->socket->ops_mutex);
1134 if (p_dev->suspended) {
1135 mutex_unlock(&p_dev->socket->ops_mutex);
1136 return 0;
1137 }
1138 p_dev->suspended = 1;
1139 mutex_unlock(&p_dev->socket->ops_mutex);
1140
1141 dev_dbg(dev, "suspending\n");
1142
1143 if (dev->driver)
1144 p_drv = to_pcmcia_drv(dev->driver);
1145
1146 if (!p_drv)
1147 goto out;
1148
1149 if (p_drv->suspend) {
1150 ret = p_drv->suspend(p_dev);
1151 if (ret) {
1152 dev_printk(KERN_ERR, dev,
1153 "pcmcia: device %s (driver %s) did "
1154 "not want to go to sleep (%d)\n",
1155 p_dev->devname, p_drv->name, ret);
1156 mutex_lock(&p_dev->socket->ops_mutex);
1157 p_dev->suspended = 0;
1158 mutex_unlock(&p_dev->socket->ops_mutex);
1159 goto out;
1160 }
1161 }
1162
1163 if (p_dev->device_no == p_dev->func) {
1164 dev_dbg(dev, "releasing configuration\n");
1165 pcmcia_release_configuration(p_dev);
1166 }
1167
1168 out:
1169 return ret;
1170 }
1171
1172
1173 static int pcmcia_dev_resume(struct device *dev)
1174 {
1175 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1176 struct pcmcia_driver *p_drv = NULL;
1177 int ret = 0;
1178
1179 mutex_lock(&p_dev->socket->ops_mutex);
1180 if (!p_dev->suspended) {
1181 mutex_unlock(&p_dev->socket->ops_mutex);
1182 return 0;
1183 }
1184 p_dev->suspended = 0;
1185 mutex_unlock(&p_dev->socket->ops_mutex);
1186
1187 dev_dbg(dev, "resuming\n");
1188
1189 if (dev->driver)
1190 p_drv = to_pcmcia_drv(dev->driver);
1191
1192 if (!p_drv)
1193 goto out;
1194
1195 if (p_dev->device_no == p_dev->func) {
1196 dev_dbg(dev, "requesting configuration\n");
1197 ret = pcmcia_enable_device(p_dev);
1198 if (ret)
1199 goto out;
1200 }
1201
1202 if (p_drv->resume)
1203 ret = p_drv->resume(p_dev);
1204
1205 out:
1206 return ret;
1207 }
1208
1209
1210 static int pcmcia_bus_suspend_callback(struct device *dev, void *_data)
1211 {
1212 struct pcmcia_socket *skt = _data;
1213 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1214
1215 if (p_dev->socket != skt || p_dev->suspended)
1216 return 0;
1217
1218 return runtime_suspend(dev);
1219 }
1220
1221 static int pcmcia_bus_resume_callback(struct device *dev, void *_data)
1222 {
1223 struct pcmcia_socket *skt = _data;
1224 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1225
1226 if (p_dev->socket != skt || !p_dev->suspended)
1227 return 0;
1228
1229 runtime_resume(dev);
1230
1231 return 0;
1232 }
1233
1234 static int pcmcia_bus_resume(struct pcmcia_socket *skt)
1235 {
1236 dev_dbg(&skt->dev, "resuming socket %d\n", skt->sock);
1237 bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback);
1238 return 0;
1239 }
1240
1241 static int pcmcia_bus_suspend(struct pcmcia_socket *skt)
1242 {
1243 dev_dbg(&skt->dev, "suspending socket %d\n", skt->sock);
1244 if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt,
1245 pcmcia_bus_suspend_callback)) {
1246 pcmcia_bus_resume(skt);
1247 return -EIO;
1248 }
1249 return 0;
1250 }
1251
1252 static int pcmcia_bus_remove(struct pcmcia_socket *skt)
1253 {
1254 atomic_set(&skt->present, 0);
1255 pcmcia_card_remove(skt, NULL);
1256
1257 mutex_lock(&skt->ops_mutex);
1258 destroy_cis_cache(skt);
1259 pcmcia_cleanup_irq(skt);
1260 mutex_unlock(&skt->ops_mutex);
1261
1262 return 0;
1263 }
1264
1265 static int pcmcia_bus_add(struct pcmcia_socket *skt)
1266 {
1267 atomic_set(&skt->present, 1);
1268
1269 mutex_lock(&skt->ops_mutex);
1270 skt->pcmcia_pfc = 0;
1271 destroy_cis_cache(skt); /* to be on the safe side... */
1272 mutex_unlock(&skt->ops_mutex);
1273
1274 pcmcia_card_add(skt);
1275
1276 return 0;
1277 }
1278
1279 static int pcmcia_bus_early_resume(struct pcmcia_socket *skt)
1280 {
1281 if (!verify_cis_cache(skt))
1282 return 0;
1283
1284 dev_dbg(&skt->dev, "cis mismatch - different card\n");
1285
1286 /* first, remove the card */
1287 pcmcia_bus_remove(skt);
1288
1289 mutex_lock(&skt->ops_mutex);
1290 destroy_cis_cache(skt);
1291 kfree(skt->fake_cis);
1292 skt->fake_cis = NULL;
1293 skt->functions = 0;
1294 mutex_unlock(&skt->ops_mutex);
1295
1296 /* now, add the new card */
1297 pcmcia_bus_add(skt);
1298 return 0;
1299 }
1300
1301
1302 /*
1303 * NOTE: This is racy. There's no guarantee the card will still be
1304 * physically present, even if the call to this function returns
1305 * non-NULL. Furthermore, the device driver most likely is unbound
1306 * almost immediately, so the timeframe where pcmcia_dev_present
1307 * returns NULL is probably really really small.
1308 */
1309 struct pcmcia_device *pcmcia_dev_present(struct pcmcia_device *_p_dev)
1310 {
1311 struct pcmcia_device *p_dev;
1312 struct pcmcia_device *ret = NULL;
1313
1314 p_dev = pcmcia_get_dev(_p_dev);
1315 if (!p_dev)
1316 return NULL;
1317
1318 if (atomic_read(&p_dev->socket->present) != 0)
1319 ret = p_dev;
1320
1321 pcmcia_put_dev(p_dev);
1322 return ret;
1323 }
1324 EXPORT_SYMBOL(pcmcia_dev_present);
1325
1326
1327 static struct pcmcia_callback pcmcia_bus_callback = {
1328 .owner = THIS_MODULE,
1329 .add = pcmcia_bus_add,
1330 .remove = pcmcia_bus_remove,
1331 .requery = pcmcia_requery,
1332 .validate = pccard_validate_cis,
1333 .suspend = pcmcia_bus_suspend,
1334 .early_resume = pcmcia_bus_early_resume,
1335 .resume = pcmcia_bus_resume,
1336 };
1337
1338 static int pcmcia_bus_add_socket(struct device *dev,
1339 struct class_interface *class_intf)
1340 {
1341 struct pcmcia_socket *socket = dev_get_drvdata(dev);
1342 int ret;
1343
1344 socket = pcmcia_get_socket(socket);
1345 if (!socket) {
1346 dev_printk(KERN_ERR, dev,
1347 "PCMCIA obtaining reference to socket failed\n");
1348 return -ENODEV;
1349 }
1350
1351 ret = sysfs_create_bin_file(&dev->kobj, &pccard_cis_attr);
1352 if (ret) {
1353 dev_printk(KERN_ERR, dev, "PCMCIA registration failed\n");
1354 pcmcia_put_socket(socket);
1355 return ret;
1356 }
1357
1358 INIT_LIST_HEAD(&socket->devices_list);
1359 socket->pcmcia_pfc = 0;
1360 socket->device_count = 0;
1361 atomic_set(&socket->present, 0);
1362
1363 ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback);
1364 if (ret) {
1365 dev_printk(KERN_ERR, dev, "PCMCIA registration failed\n");
1366 pcmcia_put_socket(socket);
1367 return ret;
1368 }
1369
1370 return 0;
1371 }
1372
1373 static void pcmcia_bus_remove_socket(struct device *dev,
1374 struct class_interface *class_intf)
1375 {
1376 struct pcmcia_socket *socket = dev_get_drvdata(dev);
1377
1378 if (!socket)
1379 return;
1380
1381 pccard_register_pcmcia(socket, NULL);
1382
1383 /* unregister any unbound devices */
1384 mutex_lock(&socket->skt_mutex);
1385 pcmcia_card_remove(socket, NULL);
1386 release_cis_mem(socket);
1387 mutex_unlock(&socket->skt_mutex);
1388
1389 sysfs_remove_bin_file(&dev->kobj, &pccard_cis_attr);
1390
1391 pcmcia_put_socket(socket);
1392
1393 return;
1394 }
1395
1396
1397 /* the pcmcia_bus_interface is used to handle pcmcia socket devices */
1398 static struct class_interface pcmcia_bus_interface __refdata = {
1399 .class = &pcmcia_socket_class,
1400 .add_dev = &pcmcia_bus_add_socket,
1401 .remove_dev = &pcmcia_bus_remove_socket,
1402 };
1403
1404
1405 struct bus_type pcmcia_bus_type = {
1406 .name = "pcmcia",
1407 .uevent = pcmcia_bus_uevent,
1408 .match = pcmcia_bus_match,
1409 .dev_groups = pcmcia_dev_groups,
1410 .probe = pcmcia_device_probe,
1411 .remove = pcmcia_device_remove,
1412 .suspend = pcmcia_dev_suspend,
1413 .resume = pcmcia_dev_resume,
1414 };
1415
1416
1417 static int __init init_pcmcia_bus(void)
1418 {
1419 int ret;
1420
1421 ret = bus_register(&pcmcia_bus_type);
1422 if (ret < 0) {
1423 printk(KERN_WARNING "pcmcia: bus_register error: %d\n", ret);
1424 return ret;
1425 }
1426 ret = class_interface_register(&pcmcia_bus_interface);
1427 if (ret < 0) {
1428 printk(KERN_WARNING
1429 "pcmcia: class_interface_register error: %d\n", ret);
1430 bus_unregister(&pcmcia_bus_type);
1431 return ret;
1432 }
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 class_interface_unregister(&pcmcia_bus_interface);
1443
1444 bus_unregister(&pcmcia_bus_type);
1445 }
1446 module_exit(exit_pcmcia_bus);
1447
1448
1449 MODULE_ALIAS("ds");
Linux kernel - Deliverables
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