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pcmcia: remove the "Finally, report what we've done" message
[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 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->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->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 if (get_driver(&pdrv->drv)) {
131 retval = driver_attach(&pdrv->drv);
132 put_driver(&pdrv->drv);
133 }
134
135 if (retval)
136 return retval;
137 return count;
138 }
139 static DRIVER_ATTR(new_id, S_IWUSR, NULL, pcmcia_store_new_id);
140
141 static void
142 pcmcia_free_dynids(struct pcmcia_driver *drv)
143 {
144 struct pcmcia_dynid *dynid, *n;
145
146 mutex_lock(&drv->dynids.lock);
147 list_for_each_entry_safe(dynid, n, &drv->dynids.list, node) {
148 list_del(&dynid->node);
149 kfree(dynid);
150 }
151 mutex_unlock(&drv->dynids.lock);
152 }
153
154 static int
155 pcmcia_create_newid_file(struct pcmcia_driver *drv)
156 {
157 int error = 0;
158 if (drv->probe != NULL)
159 error = driver_create_file(&drv->drv, &driver_attr_new_id);
160 return error;
161 }
162
163
164 /**
165 * pcmcia_register_driver - register a PCMCIA driver with the bus core
166 * @driver: the &driver being registered
167 *
168 * Registers a PCMCIA driver with the PCMCIA bus core.
169 */
170 int pcmcia_register_driver(struct pcmcia_driver *driver)
171 {
172 int error;
173
174 if (!driver)
175 return -EINVAL;
176
177 pcmcia_check_driver(driver);
178
179 /* initialize common fields */
180 driver->drv.bus = &pcmcia_bus_type;
181 driver->drv.owner = driver->owner;
182 mutex_init(&driver->dynids.lock);
183 INIT_LIST_HEAD(&driver->dynids.list);
184
185 pr_debug("registering driver %s\n", driver->drv.name);
186
187 error = driver_register(&driver->drv);
188 if (error < 0)
189 return error;
190
191 error = pcmcia_create_newid_file(driver);
192 if (error)
193 driver_unregister(&driver->drv);
194
195 return error;
196 }
197 EXPORT_SYMBOL(pcmcia_register_driver);
198
199 /**
200 * pcmcia_unregister_driver - unregister a PCMCIA driver with the bus core
201 * @driver: the &driver being unregistered
202 */
203 void pcmcia_unregister_driver(struct pcmcia_driver *driver)
204 {
205 pr_debug("unregistering driver %s\n", driver->drv.name);
206 driver_unregister(&driver->drv);
207 pcmcia_free_dynids(driver);
208 }
209 EXPORT_SYMBOL(pcmcia_unregister_driver);
210
211
212 /* pcmcia_device handling */
213
214 static struct pcmcia_device *pcmcia_get_dev(struct pcmcia_device *p_dev)
215 {
216 struct device *tmp_dev;
217 tmp_dev = get_device(&p_dev->dev);
218 if (!tmp_dev)
219 return NULL;
220 return to_pcmcia_dev(tmp_dev);
221 }
222
223 static void pcmcia_put_dev(struct pcmcia_device *p_dev)
224 {
225 if (p_dev)
226 put_device(&p_dev->dev);
227 }
228
229 static void pcmcia_release_function(struct kref *ref)
230 {
231 struct config_t *c = container_of(ref, struct config_t, ref);
232 pr_debug("releasing config_t\n");
233 kfree(c);
234 }
235
236 static void pcmcia_release_dev(struct device *dev)
237 {
238 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
239 int i;
240 dev_dbg(dev, "releasing device\n");
241 pcmcia_put_socket(p_dev->socket);
242 for (i = 0; i < 4; i++)
243 kfree(p_dev->prod_id[i]);
244 kfree(p_dev->devname);
245 kref_put(&p_dev->function_config->ref, pcmcia_release_function);
246 kfree(p_dev);
247 }
248
249
250 static int pcmcia_device_probe(struct device *dev)
251 {
252 struct pcmcia_device *p_dev;
253 struct pcmcia_driver *p_drv;
254 struct pcmcia_socket *s;
255 cistpl_config_t cis_config;
256 int ret = 0;
257
258 dev = get_device(dev);
259 if (!dev)
260 return -ENODEV;
261
262 p_dev = to_pcmcia_dev(dev);
263 p_drv = to_pcmcia_drv(dev->driver);
264 s = p_dev->socket;
265
266 dev_dbg(dev, "trying to bind to %s\n", p_drv->drv.name);
267
268 if ((!p_drv->probe) || (!p_dev->function_config) ||
269 (!try_module_get(p_drv->owner))) {
270 ret = -EINVAL;
271 goto put_dev;
272 }
273
274 /* set up some more device information */
275 ret = pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_CONFIG,
276 &cis_config);
277 if (!ret) {
278 p_dev->config_base = cis_config.base;
279 p_dev->config_regs = cis_config.rmask[0];
280 dev_dbg(dev, "base %x, regs %x", p_dev->config_base,
281 p_dev->config_regs);
282 } else {
283 dev_printk(KERN_INFO, dev,
284 "pcmcia: could not parse base and rmask0 of CIS\n");
285 p_dev->config_base = 0;
286 p_dev->config_regs = 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 dev_dbg(dev, "%s bound: Vpp %d.%d, idx %x, IRQ %d", p_drv->drv.name,
296 p_dev->vpp/10, p_dev->vpp%10, p_dev->config_index, p_dev->irq);
297 dev_dbg(dev, "resources: ioport %pR %pR iomem %pR %pR %pR",
298 p_dev->resource[0], p_dev->resource[1], p_dev->resource[2],
299 p_dev->resource[3], p_dev->resource[4]);
300
301 mutex_lock(&s->ops_mutex);
302 if ((s->pcmcia_pfc) &&
303 (p_dev->socket->device_count == 1) && (p_dev->device_no == 0))
304 pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY);
305 mutex_unlock(&s->ops_mutex);
306
307 put_module:
308 if (ret)
309 module_put(p_drv->owner);
310 put_dev:
311 if (ret)
312 put_device(dev);
313 return ret;
314 }
315
316
317 /*
318 * Removes a PCMCIA card from the device tree and socket list.
319 */
320 static void pcmcia_card_remove(struct pcmcia_socket *s, struct pcmcia_device *leftover)
321 {
322 struct pcmcia_device *p_dev;
323 struct pcmcia_device *tmp;
324
325 dev_dbg(leftover ? &leftover->dev : &s->dev,
326 "pcmcia_card_remove(%d) %s\n", s->sock,
327 leftover ? leftover->devname : "");
328
329 mutex_lock(&s->ops_mutex);
330 if (!leftover)
331 s->device_count = 0;
332 else
333 s->device_count = 1;
334 mutex_unlock(&s->ops_mutex);
335
336 /* unregister all pcmcia_devices registered with this socket, except leftover */
337 list_for_each_entry_safe(p_dev, tmp, &s->devices_list, socket_device_list) {
338 if (p_dev == leftover)
339 continue;
340
341 mutex_lock(&s->ops_mutex);
342 list_del(&p_dev->socket_device_list);
343 mutex_unlock(&s->ops_mutex);
344
345 dev_dbg(&p_dev->dev, "unregistering device\n");
346 device_unregister(&p_dev->dev);
347 }
348
349 return;
350 }
351
352 static int pcmcia_device_remove(struct device *dev)
353 {
354 struct pcmcia_device *p_dev;
355 struct pcmcia_driver *p_drv;
356 int i;
357
358 p_dev = to_pcmcia_dev(dev);
359 p_drv = to_pcmcia_drv(dev->driver);
360
361 dev_dbg(dev, "removing device\n");
362
363 /* If we're removing the primary module driving a
364 * pseudo multi-function card, we need to unbind
365 * all devices
366 */
367 if ((p_dev->socket->pcmcia_pfc) &&
368 (p_dev->socket->device_count > 0) &&
369 (p_dev->device_no == 0))
370 pcmcia_card_remove(p_dev->socket, p_dev);
371
372 /* detach the "instance" */
373 if (!p_drv)
374 return 0;
375
376 if (p_drv->remove)
377 p_drv->remove(p_dev);
378
379 /* check for proper unloading */
380 if (p_dev->_irq || p_dev->_io || p_dev->_locked)
381 dev_printk(KERN_INFO, dev,
382 "pcmcia: driver %s did not release config properly\n",
383 p_drv->drv.name);
384
385 for (i = 0; i < MAX_WIN; i++)
386 if (p_dev->_win & CLIENT_WIN_REQ(i))
387 dev_printk(KERN_INFO, dev,
388 "pcmcia: driver %s did not release window properly\n",
389 p_drv->drv.name);
390
391 /* references from pcmcia_probe_device */
392 pcmcia_put_dev(p_dev);
393 module_put(p_drv->owner);
394
395 return 0;
396 }
397
398
399 /*
400 * pcmcia_device_query -- determine information about a pcmcia device
401 */
402 static int pcmcia_device_query(struct pcmcia_device *p_dev)
403 {
404 cistpl_manfid_t manf_id;
405 cistpl_funcid_t func_id;
406 cistpl_vers_1_t *vers1;
407 unsigned int i;
408
409 vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL);
410 if (!vers1)
411 return -ENOMEM;
412
413 if (!pccard_read_tuple(p_dev->socket, BIND_FN_ALL,
414 CISTPL_MANFID, &manf_id)) {
415 mutex_lock(&p_dev->socket->ops_mutex);
416 p_dev->manf_id = manf_id.manf;
417 p_dev->card_id = manf_id.card;
418 p_dev->has_manf_id = 1;
419 p_dev->has_card_id = 1;
420 mutex_unlock(&p_dev->socket->ops_mutex);
421 }
422
423 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
424 CISTPL_FUNCID, &func_id)) {
425 mutex_lock(&p_dev->socket->ops_mutex);
426 p_dev->func_id = func_id.func;
427 p_dev->has_func_id = 1;
428 mutex_unlock(&p_dev->socket->ops_mutex);
429 } else {
430 /* rule of thumb: cards with no FUNCID, but with
431 * common memory device geometry information, are
432 * probably memory cards (from pcmcia-cs) */
433 cistpl_device_geo_t *devgeo;
434
435 devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL);
436 if (!devgeo) {
437 kfree(vers1);
438 return -ENOMEM;
439 }
440 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
441 CISTPL_DEVICE_GEO, devgeo)) {
442 dev_dbg(&p_dev->dev,
443 "mem device geometry probably means "
444 "FUNCID_MEMORY\n");
445 mutex_lock(&p_dev->socket->ops_mutex);
446 p_dev->func_id = CISTPL_FUNCID_MEMORY;
447 p_dev->has_func_id = 1;
448 mutex_unlock(&p_dev->socket->ops_mutex);
449 }
450 kfree(devgeo);
451 }
452
453 if (!pccard_read_tuple(p_dev->socket, BIND_FN_ALL, CISTPL_VERS_1,
454 vers1)) {
455 mutex_lock(&p_dev->socket->ops_mutex);
456 for (i = 0; i < min_t(unsigned int, 4, vers1->ns); i++) {
457 char *tmp;
458 unsigned int length;
459 char *new;
460
461 tmp = vers1->str + vers1->ofs[i];
462
463 length = strlen(tmp) + 1;
464 if ((length < 2) || (length > 255))
465 continue;
466
467 new = kmalloc(sizeof(char) * length, GFP_KERNEL);
468 if (!new)
469 continue;
470
471 new = strncpy(new, tmp, length);
472
473 tmp = p_dev->prod_id[i];
474 p_dev->prod_id[i] = new;
475 kfree(tmp);
476 }
477 mutex_unlock(&p_dev->socket->ops_mutex);
478 }
479
480 kfree(vers1);
481 return 0;
482 }
483
484
485 static struct pcmcia_device *pcmcia_device_add(struct pcmcia_socket *s,
486 unsigned int function)
487 {
488 struct pcmcia_device *p_dev, *tmp_dev;
489 int i;
490
491 s = pcmcia_get_socket(s);
492 if (!s)
493 return NULL;
494
495 pr_debug("adding device to %d, function %d\n", s->sock, function);
496
497 p_dev = kzalloc(sizeof(struct pcmcia_device), GFP_KERNEL);
498 if (!p_dev)
499 goto err_put;
500
501 mutex_lock(&s->ops_mutex);
502 p_dev->device_no = (s->device_count++);
503 mutex_unlock(&s->ops_mutex);
504
505 /* max of 2 PFC devices */
506 if ((p_dev->device_no >= 2) && (function == 0))
507 goto err_free;
508
509 /* max of 4 devices overall */
510 if (p_dev->device_no >= 4)
511 goto err_free;
512
513 p_dev->socket = s;
514 p_dev->func = function;
515
516 p_dev->dev.bus = &pcmcia_bus_type;
517 p_dev->dev.parent = s->dev.parent;
518 p_dev->dev.release = pcmcia_release_dev;
519 /* by default don't allow DMA */
520 p_dev->dma_mask = DMA_MASK_NONE;
521 p_dev->dev.dma_mask = &p_dev->dma_mask;
522 dev_set_name(&p_dev->dev, "%d.%d", p_dev->socket->sock, p_dev->device_no);
523 if (!dev_name(&p_dev->dev))
524 goto err_free;
525 p_dev->devname = kasprintf(GFP_KERNEL, "pcmcia%s", dev_name(&p_dev->dev));
526 if (!p_dev->devname)
527 goto err_free;
528 dev_dbg(&p_dev->dev, "devname is %s\n", p_dev->devname);
529
530 mutex_lock(&s->ops_mutex);
531
532 /*
533 * p_dev->function_config must be the same for all card functions.
534 * Note that this is serialized by ops_mutex, so that only one
535 * such struct will be created.
536 */
537 list_for_each_entry(tmp_dev, &s->devices_list, socket_device_list)
538 if (p_dev->func == tmp_dev->func) {
539 p_dev->function_config = tmp_dev->function_config;
540 p_dev->irq = tmp_dev->irq;
541 kref_get(&p_dev->function_config->ref);
542 }
543
544 /* Add to the list in pcmcia_bus_socket */
545 list_add(&p_dev->socket_device_list, &s->devices_list);
546
547 if (pcmcia_setup_irq(p_dev))
548 dev_warn(&p_dev->dev,
549 "IRQ setup failed -- device might not work\n");
550
551 if (!p_dev->function_config) {
552 config_t *c;
553 dev_dbg(&p_dev->dev, "creating config_t\n");
554 c = kzalloc(sizeof(struct config_t), GFP_KERNEL);
555 if (!c) {
556 mutex_unlock(&s->ops_mutex);
557 goto err_unreg;
558 }
559 p_dev->function_config = c;
560 kref_init(&c->ref);
561 for (i = 0; i < MAX_IO_WIN; i++) {
562 c->io[i].name = p_dev->devname;
563 c->io[i].flags = IORESOURCE_IO;
564 }
565 for (i = 0; i< MAX_WIN; i++) {
566 c->mem[i].name = p_dev->devname;
567 c->mem[i].flags = IORESOURCE_MEM;
568 }
569 }
570 for (i = 0; i < MAX_IO_WIN; i++)
571 p_dev->resource[i] = &p_dev->function_config->io[i];
572 for (; i < (MAX_IO_WIN + MAX_WIN); i++)
573 p_dev->resource[i] = &p_dev->function_config->mem[i-MAX_IO_WIN];
574
575 mutex_unlock(&s->ops_mutex);
576
577 dev_printk(KERN_NOTICE, &p_dev->dev,
578 "pcmcia: registering new device %s (IRQ: %d)\n",
579 p_dev->devname, p_dev->irq);
580
581 pcmcia_device_query(p_dev);
582
583 if (device_register(&p_dev->dev))
584 goto err_unreg;
585
586 return p_dev;
587
588 err_unreg:
589 mutex_lock(&s->ops_mutex);
590 list_del(&p_dev->socket_device_list);
591 mutex_unlock(&s->ops_mutex);
592
593 err_free:
594 mutex_lock(&s->ops_mutex);
595 s->device_count--;
596 mutex_unlock(&s->ops_mutex);
597
598 for (i = 0; i < 4; i++)
599 kfree(p_dev->prod_id[i]);
600 kfree(p_dev->devname);
601 kfree(p_dev);
602 err_put:
603 pcmcia_put_socket(s);
604
605 return NULL;
606 }
607
608
609 static int pcmcia_card_add(struct pcmcia_socket *s)
610 {
611 cistpl_longlink_mfc_t mfc;
612 unsigned int no_funcs, i, no_chains;
613 int ret = -EAGAIN;
614
615 mutex_lock(&s->ops_mutex);
616 if (!(s->resource_setup_done)) {
617 dev_dbg(&s->dev,
618 "no resources available, delaying card_add\n");
619 mutex_unlock(&s->ops_mutex);
620 return -EAGAIN; /* try again, but later... */
621 }
622
623 if (pcmcia_validate_mem(s)) {
624 dev_dbg(&s->dev, "validating mem resources failed, "
625 "delaying card_add\n");
626 mutex_unlock(&s->ops_mutex);
627 return -EAGAIN; /* try again, but later... */
628 }
629 mutex_unlock(&s->ops_mutex);
630
631 ret = pccard_validate_cis(s, &no_chains);
632 if (ret || !no_chains) {
633 dev_dbg(&s->dev, "invalid CIS or invalid resources\n");
634 return -ENODEV;
635 }
636
637 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
638 no_funcs = mfc.nfn;
639 else
640 no_funcs = 1;
641 s->functions = no_funcs;
642
643 for (i = 0; i < no_funcs; i++)
644 pcmcia_device_add(s, i);
645
646 return ret;
647 }
648
649
650 static int pcmcia_requery_callback(struct device *dev, void * _data)
651 {
652 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
653 if (!p_dev->dev.driver) {
654 dev_dbg(dev, "update device information\n");
655 pcmcia_device_query(p_dev);
656 }
657
658 return 0;
659 }
660
661
662 static void pcmcia_requery(struct pcmcia_socket *s)
663 {
664 int has_pfc;
665
666 if (s->functions == 0) {
667 pcmcia_card_add(s);
668 return;
669 }
670
671 /* some device information might have changed because of a CIS
672 * update or because we can finally read it correctly... so
673 * determine it again, overwriting old values if necessary. */
674 bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery_callback);
675
676 /* if the CIS changed, we need to check whether the number of
677 * functions changed. */
678 if (s->fake_cis) {
679 int old_funcs, new_funcs;
680 cistpl_longlink_mfc_t mfc;
681
682 /* does this cis override add or remove functions? */
683 old_funcs = s->functions;
684
685 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC,
686 &mfc))
687 new_funcs = mfc.nfn;
688 else
689 new_funcs = 1;
690 if (old_funcs != new_funcs) {
691 /* we need to re-start */
692 pcmcia_card_remove(s, NULL);
693 s->functions = 0;
694 pcmcia_card_add(s);
695 }
696 }
697
698 /* If the PCMCIA device consists of two pseudo devices,
699 * call pcmcia_device_add() -- which will fail if both
700 * devices are already registered. */
701 mutex_lock(&s->ops_mutex);
702 has_pfc = s->pcmcia_pfc;
703 mutex_unlock(&s->ops_mutex);
704 if (has_pfc)
705 pcmcia_device_add(s, 0);
706
707 /* we re-scan all devices, not just the ones connected to this
708 * socket. This does not matter, though. */
709 if (bus_rescan_devices(&pcmcia_bus_type))
710 dev_warn(&s->dev, "rescanning the bus failed\n");
711 }
712
713
714 #ifdef CONFIG_PCMCIA_LOAD_CIS
715
716 /**
717 * pcmcia_load_firmware - load CIS from userspace if device-provided is broken
718 * @dev: the pcmcia device which needs a CIS override
719 * @filename: requested filename in /lib/firmware/
720 *
721 * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if
722 * the one provided by the card is broken. The firmware files reside in
723 * /lib/firmware/ in userspace.
724 */
725 static int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
726 {
727 struct pcmcia_socket *s = dev->socket;
728 const struct firmware *fw;
729 int ret = -ENOMEM;
730 cistpl_longlink_mfc_t mfc;
731 int old_funcs, new_funcs = 1;
732
733 if (!filename)
734 return -EINVAL;
735
736 dev_dbg(&dev->dev, "trying to load CIS file %s\n", filename);
737
738 if (request_firmware(&fw, filename, &dev->dev) == 0) {
739 if (fw->size >= CISTPL_MAX_CIS_SIZE) {
740 ret = -EINVAL;
741 dev_printk(KERN_ERR, &dev->dev,
742 "pcmcia: CIS override is too big\n");
743 goto release;
744 }
745
746 if (!pcmcia_replace_cis(s, fw->data, fw->size))
747 ret = 0;
748 else {
749 dev_printk(KERN_ERR, &dev->dev,
750 "pcmcia: CIS override failed\n");
751 goto release;
752 }
753
754 /* we need to re-start if the number of functions changed */
755 old_funcs = s->functions;
756 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC,
757 &mfc))
758 new_funcs = mfc.nfn;
759
760 if (old_funcs != new_funcs)
761 ret = -EBUSY;
762
763 /* update information */
764 pcmcia_device_query(dev);
765
766 /* requery (as number of functions might have changed) */
767 pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY);
768 }
769 release:
770 release_firmware(fw);
771
772 return ret;
773 }
774
775 #else /* !CONFIG_PCMCIA_LOAD_CIS */
776
777 static inline int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
778 {
779 return -ENODEV;
780 }
781
782 #endif
783
784
785 static inline int pcmcia_devmatch(struct pcmcia_device *dev,
786 struct pcmcia_device_id *did)
787 {
788 if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
789 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
790 return 0;
791 }
792
793 if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
794 if ((!dev->has_card_id) || (dev->card_id != did->card_id))
795 return 0;
796 }
797
798 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
799 if (dev->func != did->function)
800 return 0;
801 }
802
803 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
804 if (!dev->prod_id[0])
805 return 0;
806 if (strcmp(did->prod_id[0], dev->prod_id[0]))
807 return 0;
808 }
809
810 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
811 if (!dev->prod_id[1])
812 return 0;
813 if (strcmp(did->prod_id[1], dev->prod_id[1]))
814 return 0;
815 }
816
817 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
818 if (!dev->prod_id[2])
819 return 0;
820 if (strcmp(did->prod_id[2], dev->prod_id[2]))
821 return 0;
822 }
823
824 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
825 if (!dev->prod_id[3])
826 return 0;
827 if (strcmp(did->prod_id[3], dev->prod_id[3]))
828 return 0;
829 }
830
831 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
832 dev_dbg(&dev->dev, "this is a pseudo-multi-function device\n");
833 mutex_lock(&dev->socket->ops_mutex);
834 dev->socket->pcmcia_pfc = 1;
835 mutex_unlock(&dev->socket->ops_mutex);
836 if (dev->device_no != did->device_no)
837 return 0;
838 }
839
840 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
841 int ret;
842
843 if ((!dev->has_func_id) || (dev->func_id != did->func_id))
844 return 0;
845
846 /* if this is a pseudo-multi-function device,
847 * we need explicit matches */
848 if (dev->socket->pcmcia_pfc)
849 return 0;
850 if (dev->device_no)
851 return 0;
852
853 /* also, FUNC_ID matching needs to be activated by userspace
854 * after it has re-checked that there is no possible module
855 * with a prod_id/manf_id/card_id match.
856 */
857 mutex_lock(&dev->socket->ops_mutex);
858 ret = dev->allow_func_id_match;
859 mutex_unlock(&dev->socket->ops_mutex);
860
861 if (!ret) {
862 dev_dbg(&dev->dev,
863 "skipping FUNC_ID match until userspace ACK\n");
864 return 0;
865 }
866 }
867
868 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
869 dev_dbg(&dev->dev, "device needs a fake CIS\n");
870 if (!dev->socket->fake_cis)
871 if (pcmcia_load_firmware(dev, did->cisfile))
872 return 0;
873 }
874
875 if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
876 int i;
877 for (i = 0; i < 4; i++)
878 if (dev->prod_id[i])
879 return 0;
880 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
881 return 0;
882 }
883
884 return 1;
885 }
886
887
888 static int pcmcia_bus_match(struct device *dev, struct device_driver *drv)
889 {
890 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
891 struct pcmcia_driver *p_drv = to_pcmcia_drv(drv);
892 struct pcmcia_device_id *did = p_drv->id_table;
893 struct pcmcia_dynid *dynid;
894
895 /* match dynamic devices first */
896 mutex_lock(&p_drv->dynids.lock);
897 list_for_each_entry(dynid, &p_drv->dynids.list, node) {
898 dev_dbg(dev, "trying to match to %s\n", drv->name);
899 if (pcmcia_devmatch(p_dev, &dynid->id)) {
900 dev_dbg(dev, "matched to %s\n", drv->name);
901 mutex_unlock(&p_drv->dynids.lock);
902 return 1;
903 }
904 }
905 mutex_unlock(&p_drv->dynids.lock);
906
907 while (did && did->match_flags) {
908 dev_dbg(dev, "trying to match to %s\n", drv->name);
909 if (pcmcia_devmatch(p_dev, did)) {
910 dev_dbg(dev, "matched to %s\n", drv->name);
911 return 1;
912 }
913 did++;
914 }
915
916 return 0;
917 }
918
919 #ifdef CONFIG_HOTPLUG
920
921 static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
922 {
923 struct pcmcia_device *p_dev;
924 int i;
925 u32 hash[4] = { 0, 0, 0, 0};
926
927 if (!dev)
928 return -ENODEV;
929
930 p_dev = to_pcmcia_dev(dev);
931
932 /* calculate hashes */
933 for (i = 0; i < 4; i++) {
934 if (!p_dev->prod_id[i])
935 continue;
936 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
937 }
938
939 if (add_uevent_var(env, "SOCKET_NO=%u", p_dev->socket->sock))
940 return -ENOMEM;
941
942 if (add_uevent_var(env, "DEVICE_NO=%02X", p_dev->device_no))
943 return -ENOMEM;
944
945 if (add_uevent_var(env, "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
946 "pa%08Xpb%08Xpc%08Xpd%08X",
947 p_dev->has_manf_id ? p_dev->manf_id : 0,
948 p_dev->has_card_id ? p_dev->card_id : 0,
949 p_dev->has_func_id ? p_dev->func_id : 0,
950 p_dev->func,
951 p_dev->device_no,
952 hash[0],
953 hash[1],
954 hash[2],
955 hash[3]))
956 return -ENOMEM;
957
958 return 0;
959 }
960
961 #else
962
963 static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
964 {
965 return -ENODEV;
966 }
967
968 #endif
969
970 /************************ runtime PM support ***************************/
971
972 static int pcmcia_dev_suspend(struct device *dev, pm_message_t state);
973 static int pcmcia_dev_resume(struct device *dev);
974
975 static int runtime_suspend(struct device *dev)
976 {
977 int rc;
978
979 device_lock(dev);
980 rc = pcmcia_dev_suspend(dev, PMSG_SUSPEND);
981 device_unlock(dev);
982 return rc;
983 }
984
985 static int runtime_resume(struct device *dev)
986 {
987 int rc;
988
989 device_lock(dev);
990 rc = pcmcia_dev_resume(dev);
991 device_unlock(dev);
992 return rc;
993 }
994
995 /************************ per-device sysfs output ***************************/
996
997 #define pcmcia_device_attr(field, test, format) \
998 static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf) \
999 { \
1000 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
1001 return p_dev->test ? sprintf(buf, format, p_dev->field) : -ENODEV; \
1002 }
1003
1004 #define pcmcia_device_stringattr(name, field) \
1005 static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf) \
1006 { \
1007 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
1008 return p_dev->field ? sprintf(buf, "%s\n", p_dev->field) : -ENODEV; \
1009 }
1010
1011 pcmcia_device_attr(func, socket, "0x%02x\n");
1012 pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
1013 pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
1014 pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
1015 pcmcia_device_stringattr(prod_id1, prod_id[0]);
1016 pcmcia_device_stringattr(prod_id2, prod_id[1]);
1017 pcmcia_device_stringattr(prod_id3, prod_id[2]);
1018 pcmcia_device_stringattr(prod_id4, prod_id[3]);
1019
1020 static ssize_t pcmcia_show_resources(struct device *dev,
1021 struct device_attribute *attr, char *buf)
1022 {
1023 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1024 char *str = buf;
1025 int i;
1026
1027 for (i = 0; i < PCMCIA_NUM_RESOURCES; i++)
1028 str += sprintf(str, "%pr\n", p_dev->resource[i]);
1029
1030 return str - buf;
1031 }
1032
1033 static ssize_t pcmcia_show_pm_state(struct device *dev, struct device_attribute *attr, char *buf)
1034 {
1035 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1036
1037 if (p_dev->suspended)
1038 return sprintf(buf, "off\n");
1039 else
1040 return sprintf(buf, "on\n");
1041 }
1042
1043 static ssize_t pcmcia_store_pm_state(struct device *dev, struct device_attribute *attr,
1044 const char *buf, size_t count)
1045 {
1046 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1047 int ret = 0;
1048
1049 if (!count)
1050 return -EINVAL;
1051
1052 if ((!p_dev->suspended) && !strncmp(buf, "off", 3))
1053 ret = runtime_suspend(dev);
1054 else if (p_dev->suspended && !strncmp(buf, "on", 2))
1055 ret = runtime_resume(dev);
1056
1057 return ret ? ret : count;
1058 }
1059
1060
1061 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1062 {
1063 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1064 int i;
1065 u32 hash[4] = { 0, 0, 0, 0};
1066
1067 /* calculate hashes */
1068 for (i = 0; i < 4; i++) {
1069 if (!p_dev->prod_id[i])
1070 continue;
1071 hash[i] = crc32(0, p_dev->prod_id[i],
1072 strlen(p_dev->prod_id[i]));
1073 }
1074 return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
1075 "pa%08Xpb%08Xpc%08Xpd%08X\n",
1076 p_dev->has_manf_id ? p_dev->manf_id : 0,
1077 p_dev->has_card_id ? p_dev->card_id : 0,
1078 p_dev->has_func_id ? p_dev->func_id : 0,
1079 p_dev->func, p_dev->device_no,
1080 hash[0], hash[1], hash[2], hash[3]);
1081 }
1082
1083 static ssize_t pcmcia_store_allow_func_id_match(struct device *dev,
1084 struct device_attribute *attr, const char *buf, size_t count)
1085 {
1086 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1087
1088 if (!count)
1089 return -EINVAL;
1090
1091 mutex_lock(&p_dev->socket->ops_mutex);
1092 p_dev->allow_func_id_match = 1;
1093 mutex_unlock(&p_dev->socket->ops_mutex);
1094 pcmcia_parse_uevents(p_dev->socket, PCMCIA_UEVENT_REQUERY);
1095
1096 return count;
1097 }
1098
1099 static struct device_attribute pcmcia_dev_attrs[] = {
1100 __ATTR(function, 0444, func_show, NULL),
1101 __ATTR(pm_state, 0644, pcmcia_show_pm_state, pcmcia_store_pm_state),
1102 __ATTR(resources, 0444, pcmcia_show_resources, NULL),
1103 __ATTR_RO(func_id),
1104 __ATTR_RO(manf_id),
1105 __ATTR_RO(card_id),
1106 __ATTR_RO(prod_id1),
1107 __ATTR_RO(prod_id2),
1108 __ATTR_RO(prod_id3),
1109 __ATTR_RO(prod_id4),
1110 __ATTR_RO(modalias),
1111 __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match),
1112 __ATTR_NULL,
1113 };
1114
1115 /* PM support, also needed for reset */
1116
1117 static int pcmcia_dev_suspend(struct device *dev, pm_message_t state)
1118 {
1119 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1120 struct pcmcia_driver *p_drv = NULL;
1121 int ret = 0;
1122
1123 mutex_lock(&p_dev->socket->ops_mutex);
1124 if (p_dev->suspended) {
1125 mutex_unlock(&p_dev->socket->ops_mutex);
1126 return 0;
1127 }
1128 p_dev->suspended = 1;
1129 mutex_unlock(&p_dev->socket->ops_mutex);
1130
1131 dev_dbg(dev, "suspending\n");
1132
1133 if (dev->driver)
1134 p_drv = to_pcmcia_drv(dev->driver);
1135
1136 if (!p_drv)
1137 goto out;
1138
1139 if (p_drv->suspend) {
1140 ret = p_drv->suspend(p_dev);
1141 if (ret) {
1142 dev_printk(KERN_ERR, dev,
1143 "pcmcia: device %s (driver %s) did "
1144 "not want to go to sleep (%d)\n",
1145 p_dev->devname, p_drv->drv.name, ret);
1146 mutex_lock(&p_dev->socket->ops_mutex);
1147 p_dev->suspended = 0;
1148 mutex_unlock(&p_dev->socket->ops_mutex);
1149 goto out;
1150 }
1151 }
1152
1153 if (p_dev->device_no == p_dev->func) {
1154 dev_dbg(dev, "releasing configuration\n");
1155 pcmcia_release_configuration(p_dev);
1156 }
1157
1158 out:
1159 return ret;
1160 }
1161
1162
1163 static int pcmcia_dev_resume(struct device *dev)
1164 {
1165 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1166 struct pcmcia_driver *p_drv = NULL;
1167 int ret = 0;
1168
1169 mutex_lock(&p_dev->socket->ops_mutex);
1170 if (!p_dev->suspended) {
1171 mutex_unlock(&p_dev->socket->ops_mutex);
1172 return 0;
1173 }
1174 p_dev->suspended = 0;
1175 mutex_unlock(&p_dev->socket->ops_mutex);
1176
1177 dev_dbg(dev, "resuming\n");
1178
1179 if (dev->driver)
1180 p_drv = to_pcmcia_drv(dev->driver);
1181
1182 if (!p_drv)
1183 goto out;
1184
1185 if (p_dev->device_no == p_dev->func) {
1186 dev_dbg(dev, "requesting configuration\n");
1187 ret = pcmcia_enable_device(p_dev);
1188 if (ret)
1189 goto out;
1190 }
1191
1192 if (p_drv->resume)
1193 ret = p_drv->resume(p_dev);
1194
1195 out:
1196 return ret;
1197 }
1198
1199
1200 static int pcmcia_bus_suspend_callback(struct device *dev, void * _data)
1201 {
1202 struct pcmcia_socket *skt = _data;
1203 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1204
1205 if (p_dev->socket != skt || p_dev->suspended)
1206 return 0;
1207
1208 return runtime_suspend(dev);
1209 }
1210
1211 static int pcmcia_bus_resume_callback(struct device *dev, void * _data)
1212 {
1213 struct pcmcia_socket *skt = _data;
1214 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1215
1216 if (p_dev->socket != skt || !p_dev->suspended)
1217 return 0;
1218
1219 runtime_resume(dev);
1220
1221 return 0;
1222 }
1223
1224 static int pcmcia_bus_resume(struct pcmcia_socket *skt)
1225 {
1226 dev_dbg(&skt->dev, "resuming socket %d\n", skt->sock);
1227 bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback);
1228 return 0;
1229 }
1230
1231 static int pcmcia_bus_suspend(struct pcmcia_socket *skt)
1232 {
1233 dev_dbg(&skt->dev, "suspending socket %d\n", skt->sock);
1234 if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt,
1235 pcmcia_bus_suspend_callback)) {
1236 pcmcia_bus_resume(skt);
1237 return -EIO;
1238 }
1239 return 0;
1240 }
1241
1242 static int pcmcia_bus_remove(struct pcmcia_socket *skt)
1243 {
1244 atomic_set(&skt->present, 0);
1245 pcmcia_card_remove(skt, NULL);
1246
1247 mutex_lock(&skt->ops_mutex);
1248 destroy_cis_cache(skt);
1249 pcmcia_cleanup_irq(skt);
1250 mutex_unlock(&skt->ops_mutex);
1251
1252 return 0;
1253 }
1254
1255 static int pcmcia_bus_add(struct pcmcia_socket *skt)
1256 {
1257 atomic_set(&skt->present, 1);
1258
1259 mutex_lock(&skt->ops_mutex);
1260 skt->pcmcia_pfc = 0;
1261 destroy_cis_cache(skt); /* to be on the safe side... */
1262 mutex_unlock(&skt->ops_mutex);
1263
1264 pcmcia_card_add(skt);
1265
1266 return 0;
1267 }
1268
1269 static int pcmcia_bus_early_resume(struct pcmcia_socket *skt)
1270 {
1271 if (!verify_cis_cache(skt)) {
1272 pcmcia_put_socket(skt);
1273 return 0;
1274 }
1275
1276 dev_dbg(&skt->dev, "cis mismatch - different card\n");
1277
1278 /* first, remove the card */
1279 pcmcia_bus_remove(skt);
1280
1281 mutex_lock(&skt->ops_mutex);
1282 destroy_cis_cache(skt);
1283 kfree(skt->fake_cis);
1284 skt->fake_cis = NULL;
1285 skt->functions = 0;
1286 mutex_unlock(&skt->ops_mutex);
1287
1288 /* now, add the new card */
1289 pcmcia_bus_add(skt);
1290 return 0;
1291 }
1292
1293
1294 /*
1295 * NOTE: This is racy. There's no guarantee the card will still be
1296 * physically present, even if the call to this function returns
1297 * non-NULL. Furthermore, the device driver most likely is unbound
1298 * almost immediately, so the timeframe where pcmcia_dev_present
1299 * returns NULL is probably really really small.
1300 */
1301 struct pcmcia_device *pcmcia_dev_present(struct pcmcia_device *_p_dev)
1302 {
1303 struct pcmcia_device *p_dev;
1304 struct pcmcia_device *ret = NULL;
1305
1306 p_dev = pcmcia_get_dev(_p_dev);
1307 if (!p_dev)
1308 return NULL;
1309
1310 if (atomic_read(&p_dev->socket->present) != 0)
1311 ret = p_dev;
1312
1313 pcmcia_put_dev(p_dev);
1314 return ret;
1315 }
1316 EXPORT_SYMBOL(pcmcia_dev_present);
1317
1318
1319 static struct pcmcia_callback pcmcia_bus_callback = {
1320 .owner = THIS_MODULE,
1321 .add = pcmcia_bus_add,
1322 .remove = pcmcia_bus_remove,
1323 .requery = pcmcia_requery,
1324 .validate = pccard_validate_cis,
1325 .suspend = pcmcia_bus_suspend,
1326 .early_resume = pcmcia_bus_early_resume,
1327 .resume = pcmcia_bus_resume,
1328 };
1329
1330 static int __devinit pcmcia_bus_add_socket(struct device *dev,
1331 struct class_interface *class_intf)
1332 {
1333 struct pcmcia_socket *socket = dev_get_drvdata(dev);
1334 int ret;
1335
1336 socket = pcmcia_get_socket(socket);
1337 if (!socket) {
1338 dev_printk(KERN_ERR, dev,
1339 "PCMCIA obtaining reference to socket failed\n");
1340 return -ENODEV;
1341 }
1342
1343 ret = sysfs_create_bin_file(&dev->kobj, &pccard_cis_attr);
1344 if (ret) {
1345 dev_printk(KERN_ERR, dev, "PCMCIA registration failed\n");
1346 pcmcia_put_socket(socket);
1347 return ret;
1348 }
1349
1350 INIT_LIST_HEAD(&socket->devices_list);
1351 socket->pcmcia_pfc = 0;
1352 socket->device_count = 0;
1353 atomic_set(&socket->present, 0);
1354
1355 ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback);
1356 if (ret) {
1357 dev_printk(KERN_ERR, dev, "PCMCIA registration failed\n");
1358 pcmcia_put_socket(socket);
1359 return ret;
1360 }
1361
1362 return 0;
1363 }
1364
1365 static void pcmcia_bus_remove_socket(struct device *dev,
1366 struct class_interface *class_intf)
1367 {
1368 struct pcmcia_socket *socket = dev_get_drvdata(dev);
1369
1370 if (!socket)
1371 return;
1372
1373 pccard_register_pcmcia(socket, NULL);
1374
1375 /* unregister any unbound devices */
1376 mutex_lock(&socket->skt_mutex);
1377 pcmcia_card_remove(socket, NULL);
1378 release_cis_mem(socket);
1379 mutex_unlock(&socket->skt_mutex);
1380
1381 sysfs_remove_bin_file(&dev->kobj, &pccard_cis_attr);
1382
1383 pcmcia_put_socket(socket);
1384
1385 return;
1386 }
1387
1388
1389 /* the pcmcia_bus_interface is used to handle pcmcia socket devices */
1390 static struct class_interface pcmcia_bus_interface __refdata = {
1391 .class = &pcmcia_socket_class,
1392 .add_dev = &pcmcia_bus_add_socket,
1393 .remove_dev = &pcmcia_bus_remove_socket,
1394 };
1395
1396
1397 struct bus_type pcmcia_bus_type = {
1398 .name = "pcmcia",
1399 .uevent = pcmcia_bus_uevent,
1400 .match = pcmcia_bus_match,
1401 .dev_attrs = pcmcia_dev_attrs,
1402 .probe = pcmcia_device_probe,
1403 .remove = pcmcia_device_remove,
1404 .suspend = pcmcia_dev_suspend,
1405 .resume = pcmcia_dev_resume,
1406 };
1407
1408
1409 static int __init init_pcmcia_bus(void)
1410 {
1411 int ret;
1412
1413 ret = bus_register(&pcmcia_bus_type);
1414 if (ret < 0) {
1415 printk(KERN_WARNING "pcmcia: bus_register error: %d\n", ret);
1416 return ret;
1417 }
1418 ret = class_interface_register(&pcmcia_bus_interface);
1419 if (ret < 0) {
1420 printk(KERN_WARNING
1421 "pcmcia: class_interface_register error: %d\n", ret);
1422 bus_unregister(&pcmcia_bus_type);
1423 return ret;
1424 }
1425
1426 return 0;
1427 }
1428 fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that
1429 * pcmcia_socket_class is already registered */
1430
1431
1432 static void __exit exit_pcmcia_bus(void)
1433 {
1434 class_interface_unregister(&pcmcia_bus_interface);
1435
1436 bus_unregister(&pcmcia_bus_type);
1437 }
1438 module_exit(exit_pcmcia_bus);
1439
1440
1441 MODULE_ALIAS("ds");
Linux kernel - Deliverables
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