xref: /openbmc/linux/drivers/pcmcia/ds.c (revision 4800cd83)
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->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 	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 	driver->drv.name = driver->name;
183 	mutex_init(&driver->dynids.lock);
184 	INIT_LIST_HEAD(&driver->dynids.list);
185 
186 	pr_debug("registering driver %s\n", driver->name);
187 
188 	error = driver_register(&driver->drv);
189 	if (error < 0)
190 		return error;
191 
192 	error = pcmcia_create_newid_file(driver);
193 	if (error)
194 		driver_unregister(&driver->drv);
195 
196 	return error;
197 }
198 EXPORT_SYMBOL(pcmcia_register_driver);
199 
200 /**
201  * pcmcia_unregister_driver - unregister a PCMCIA driver with the bus core
202  * @driver: the &driver being unregistered
203  */
204 void pcmcia_unregister_driver(struct pcmcia_driver *driver)
205 {
206 	pr_debug("unregistering driver %s\n", driver->name);
207 	driver_unregister(&driver->drv);
208 	pcmcia_free_dynids(driver);
209 }
210 EXPORT_SYMBOL(pcmcia_unregister_driver);
211 
212 
213 /* pcmcia_device handling */
214 
215 static struct pcmcia_device *pcmcia_get_dev(struct pcmcia_device *p_dev)
216 {
217 	struct device *tmp_dev;
218 	tmp_dev = get_device(&p_dev->dev);
219 	if (!tmp_dev)
220 		return NULL;
221 	return to_pcmcia_dev(tmp_dev);
222 }
223 
224 static void pcmcia_put_dev(struct pcmcia_device *p_dev)
225 {
226 	if (p_dev)
227 		put_device(&p_dev->dev);
228 }
229 
230 static void pcmcia_release_function(struct kref *ref)
231 {
232 	struct config_t *c = container_of(ref, struct config_t, ref);
233 	pr_debug("releasing config_t\n");
234 	kfree(c);
235 }
236 
237 static void pcmcia_release_dev(struct device *dev)
238 {
239 	struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
240 	int i;
241 	dev_dbg(dev, "releasing device\n");
242 	pcmcia_put_socket(p_dev->socket);
243 	for (i = 0; i < 4; i++)
244 		kfree(p_dev->prod_id[i]);
245 	kfree(p_dev->devname);
246 	kref_put(&p_dev->function_config->ref, pcmcia_release_function);
247 	kfree(p_dev);
248 }
249 
250 
251 static int pcmcia_device_probe(struct device *dev)
252 {
253 	struct pcmcia_device *p_dev;
254 	struct pcmcia_driver *p_drv;
255 	struct pcmcia_socket *s;
256 	cistpl_config_t cis_config;
257 	int ret = 0;
258 
259 	dev = get_device(dev);
260 	if (!dev)
261 		return -ENODEV;
262 
263 	p_dev = to_pcmcia_dev(dev);
264 	p_drv = to_pcmcia_drv(dev->driver);
265 	s = p_dev->socket;
266 
267 	dev_dbg(dev, "trying to bind to %s\n", p_drv->name);
268 
269 	if ((!p_drv->probe) || (!p_dev->function_config) ||
270 	    (!try_module_get(p_drv->owner))) {
271 		ret = -EINVAL;
272 		goto put_dev;
273 	}
274 
275 	/* set up some more device information */
276 	ret = pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_CONFIG,
277 				&cis_config);
278 	if (!ret) {
279 		p_dev->config_base = cis_config.base;
280 		p_dev->config_regs = cis_config.rmask[0];
281 		dev_dbg(dev, "base %x, regs %x", p_dev->config_base,
282 			p_dev->config_regs);
283 	} else {
284 		dev_printk(KERN_INFO, dev,
285 			   "pcmcia: could not parse base and rmask0 of CIS\n");
286 		p_dev->config_base = 0;
287 		p_dev->config_regs = 0;
288 	}
289 
290 	ret = p_drv->probe(p_dev);
291 	if (ret) {
292 		dev_dbg(dev, "binding to %s failed with %d\n",
293 			   p_drv->name, ret);
294 		goto put_module;
295 	}
296 	dev_dbg(dev, "%s bound: Vpp %d.%d, idx %x, IRQ %d", p_drv->name,
297 		p_dev->vpp/10, p_dev->vpp%10, p_dev->config_index, p_dev->irq);
298 	dev_dbg(dev, "resources: ioport %pR %pR iomem %pR %pR %pR",
299 		p_dev->resource[0], p_dev->resource[1], p_dev->resource[2],
300 		p_dev->resource[3], p_dev->resource[4]);
301 
302 	mutex_lock(&s->ops_mutex);
303 	if ((s->pcmcia_pfc) &&
304 	    (p_dev->socket->device_count == 1) && (p_dev->device_no == 0))
305 		pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY);
306 	mutex_unlock(&s->ops_mutex);
307 
308 put_module:
309 	if (ret)
310 		module_put(p_drv->owner);
311 put_dev:
312 	if (ret)
313 		put_device(dev);
314 	return ret;
315 }
316 
317 
318 /*
319  * Removes a PCMCIA card from the device tree and socket list.
320  */
321 static void pcmcia_card_remove(struct pcmcia_socket *s, struct pcmcia_device *leftover)
322 {
323 	struct pcmcia_device	*p_dev;
324 	struct pcmcia_device	*tmp;
325 
326 	dev_dbg(leftover ? &leftover->dev : &s->dev,
327 		   "pcmcia_card_remove(%d) %s\n", s->sock,
328 		   leftover ? leftover->devname : "");
329 
330 	mutex_lock(&s->ops_mutex);
331 	if (!leftover)
332 		s->device_count = 0;
333 	else
334 		s->device_count = 1;
335 	mutex_unlock(&s->ops_mutex);
336 
337 	/* unregister all pcmcia_devices registered with this socket, except leftover */
338 	list_for_each_entry_safe(p_dev, tmp, &s->devices_list, socket_device_list) {
339 		if (p_dev == leftover)
340 			continue;
341 
342 		mutex_lock(&s->ops_mutex);
343 		list_del(&p_dev->socket_device_list);
344 		mutex_unlock(&s->ops_mutex);
345 
346 		dev_dbg(&p_dev->dev, "unregistering device\n");
347 		device_unregister(&p_dev->dev);
348 	}
349 
350 	return;
351 }
352 
353 static int pcmcia_device_remove(struct device *dev)
354 {
355 	struct pcmcia_device *p_dev;
356 	struct pcmcia_driver *p_drv;
357 	int i;
358 
359 	p_dev = to_pcmcia_dev(dev);
360 	p_drv = to_pcmcia_drv(dev->driver);
361 
362 	dev_dbg(dev, "removing device\n");
363 
364 	/* If we're removing the primary module driving a
365 	 * pseudo multi-function card, we need to unbind
366 	 * all devices
367 	 */
368 	if ((p_dev->socket->pcmcia_pfc) &&
369 	    (p_dev->socket->device_count > 0) &&
370 	    (p_dev->device_no == 0))
371 		pcmcia_card_remove(p_dev->socket, p_dev);
372 
373 	/* detach the "instance" */
374 	if (!p_drv)
375 		return 0;
376 
377 	if (p_drv->remove)
378 		p_drv->remove(p_dev);
379 
380 	/* check for proper unloading */
381 	if (p_dev->_irq || p_dev->_io || p_dev->_locked)
382 		dev_printk(KERN_INFO, dev,
383 			"pcmcia: driver %s did not release config properly\n",
384 			p_drv->name);
385 
386 	for (i = 0; i < MAX_WIN; i++)
387 		if (p_dev->_win & CLIENT_WIN_REQ(i))
388 			dev_printk(KERN_INFO, dev,
389 			  "pcmcia: driver %s did not release window properly\n",
390 			   p_drv->name);
391 
392 	/* references from pcmcia_probe_device */
393 	pcmcia_put_dev(p_dev);
394 	module_put(p_drv->owner);
395 
396 	return 0;
397 }
398 
399 
400 /*
401  * pcmcia_device_query -- determine information about a pcmcia device
402  */
403 static int pcmcia_device_query(struct pcmcia_device *p_dev)
404 {
405 	cistpl_manfid_t manf_id;
406 	cistpl_funcid_t func_id;
407 	cistpl_vers_1_t	*vers1;
408 	unsigned int i;
409 
410 	vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL);
411 	if (!vers1)
412 		return -ENOMEM;
413 
414 	if (!pccard_read_tuple(p_dev->socket, BIND_FN_ALL,
415 			       CISTPL_MANFID, &manf_id)) {
416 		mutex_lock(&p_dev->socket->ops_mutex);
417 		p_dev->manf_id = manf_id.manf;
418 		p_dev->card_id = manf_id.card;
419 		p_dev->has_manf_id = 1;
420 		p_dev->has_card_id = 1;
421 		mutex_unlock(&p_dev->socket->ops_mutex);
422 	}
423 
424 	if (!pccard_read_tuple(p_dev->socket, p_dev->func,
425 			       CISTPL_FUNCID, &func_id)) {
426 		mutex_lock(&p_dev->socket->ops_mutex);
427 		p_dev->func_id = func_id.func;
428 		p_dev->has_func_id = 1;
429 		mutex_unlock(&p_dev->socket->ops_mutex);
430 	} else {
431 		/* rule of thumb: cards with no FUNCID, but with
432 		 * common memory device geometry information, are
433 		 * probably memory cards (from pcmcia-cs) */
434 		cistpl_device_geo_t *devgeo;
435 
436 		devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL);
437 		if (!devgeo) {
438 			kfree(vers1);
439 			return -ENOMEM;
440 		}
441 		if (!pccard_read_tuple(p_dev->socket, p_dev->func,
442 				      CISTPL_DEVICE_GEO, devgeo)) {
443 			dev_dbg(&p_dev->dev,
444 				   "mem device geometry probably means "
445 				   "FUNCID_MEMORY\n");
446 			mutex_lock(&p_dev->socket->ops_mutex);
447 			p_dev->func_id = CISTPL_FUNCID_MEMORY;
448 			p_dev->has_func_id = 1;
449 			mutex_unlock(&p_dev->socket->ops_mutex);
450 		}
451 		kfree(devgeo);
452 	}
453 
454 	if (!pccard_read_tuple(p_dev->socket, BIND_FN_ALL, CISTPL_VERS_1,
455 			       vers1)) {
456 		mutex_lock(&p_dev->socket->ops_mutex);
457 		for (i = 0; i < min_t(unsigned int, 4, vers1->ns); i++) {
458 			char *tmp;
459 			unsigned int length;
460 			char *new;
461 
462 			tmp = vers1->str + vers1->ofs[i];
463 
464 			length = strlen(tmp) + 1;
465 			if ((length < 2) || (length > 255))
466 				continue;
467 
468 			new = kmalloc(sizeof(char) * length, GFP_KERNEL);
469 			if (!new)
470 				continue;
471 
472 			new = strncpy(new, tmp, length);
473 
474 			tmp = p_dev->prod_id[i];
475 			p_dev->prod_id[i] = new;
476 			kfree(tmp);
477 		}
478 		mutex_unlock(&p_dev->socket->ops_mutex);
479 	}
480 
481 	kfree(vers1);
482 	return 0;
483 }
484 
485 
486 static struct pcmcia_device *pcmcia_device_add(struct pcmcia_socket *s,
487 					       unsigned int function)
488 {
489 	struct pcmcia_device *p_dev, *tmp_dev;
490 	int i;
491 
492 	s = pcmcia_get_socket(s);
493 	if (!s)
494 		return NULL;
495 
496 	pr_debug("adding device to %d, function %d\n", s->sock, function);
497 
498 	p_dev = kzalloc(sizeof(struct pcmcia_device), GFP_KERNEL);
499 	if (!p_dev)
500 		goto err_put;
501 
502 	mutex_lock(&s->ops_mutex);
503 	p_dev->device_no = (s->device_count++);
504 	mutex_unlock(&s->ops_mutex);
505 
506 	/* max of 2 PFC devices */
507 	if ((p_dev->device_no >= 2) && (function == 0))
508 		goto err_free;
509 
510 	/* max of 4 devices overall */
511 	if (p_dev->device_no >= 4)
512 		goto err_free;
513 
514 	p_dev->socket = s;
515 	p_dev->func   = function;
516 
517 	p_dev->dev.bus = &pcmcia_bus_type;
518 	p_dev->dev.parent = s->dev.parent;
519 	p_dev->dev.release = pcmcia_release_dev;
520 	/* by default don't allow DMA */
521 	p_dev->dma_mask = DMA_MASK_NONE;
522 	p_dev->dev.dma_mask = &p_dev->dma_mask;
523 	dev_set_name(&p_dev->dev, "%d.%d", p_dev->socket->sock, p_dev->device_no);
524 	if (!dev_name(&p_dev->dev))
525 		goto err_free;
526 	p_dev->devname = kasprintf(GFP_KERNEL, "pcmcia%s", dev_name(&p_dev->dev));
527 	if (!p_dev->devname)
528 		goto err_free;
529 	dev_dbg(&p_dev->dev, "devname is %s\n", p_dev->devname);
530 
531 	mutex_lock(&s->ops_mutex);
532 
533 	/*
534 	 * p_dev->function_config must be the same for all card functions.
535 	 * Note that this is serialized by ops_mutex, so that only one
536 	 * such struct will be created.
537 	 */
538 	list_for_each_entry(tmp_dev, &s->devices_list, socket_device_list)
539 		if (p_dev->func == tmp_dev->func) {
540 			p_dev->function_config = tmp_dev->function_config;
541 			p_dev->irq = tmp_dev->irq;
542 			kref_get(&p_dev->function_config->ref);
543 		}
544 
545 	/* Add to the list in pcmcia_bus_socket */
546 	list_add(&p_dev->socket_device_list, &s->devices_list);
547 
548 	if (pcmcia_setup_irq(p_dev))
549 		dev_warn(&p_dev->dev,
550 			"IRQ setup failed -- device might not work\n");
551 
552 	if (!p_dev->function_config) {
553 		config_t *c;
554 		dev_dbg(&p_dev->dev, "creating config_t\n");
555 		c = kzalloc(sizeof(struct config_t), GFP_KERNEL);
556 		if (!c) {
557 			mutex_unlock(&s->ops_mutex);
558 			goto err_unreg;
559 		}
560 		p_dev->function_config = c;
561 		kref_init(&c->ref);
562 		for (i = 0; i < MAX_IO_WIN; i++) {
563 			c->io[i].name = p_dev->devname;
564 			c->io[i].flags = IORESOURCE_IO;
565 		}
566 		for (i = 0; i< MAX_WIN; i++) {
567 			c->mem[i].name = p_dev->devname;
568 			c->mem[i].flags = IORESOURCE_MEM;
569 		}
570 	}
571 	for (i = 0; i < MAX_IO_WIN; i++)
572 		p_dev->resource[i] = &p_dev->function_config->io[i];
573 	for (; i < (MAX_IO_WIN + MAX_WIN); i++)
574 		p_dev->resource[i] = &p_dev->function_config->mem[i-MAX_IO_WIN];
575 
576 	mutex_unlock(&s->ops_mutex);
577 
578 	dev_printk(KERN_NOTICE, &p_dev->dev,
579 		   "pcmcia: registering new device %s (IRQ: %d)\n",
580 		   p_dev->devname, p_dev->irq);
581 
582 	pcmcia_device_query(p_dev);
583 
584 	if (device_register(&p_dev->dev))
585 		goto err_unreg;
586 
587 	return p_dev;
588 
589  err_unreg:
590 	mutex_lock(&s->ops_mutex);
591 	list_del(&p_dev->socket_device_list);
592 	mutex_unlock(&s->ops_mutex);
593 
594  err_free:
595 	mutex_lock(&s->ops_mutex);
596 	s->device_count--;
597 	mutex_unlock(&s->ops_mutex);
598 
599 	for (i = 0; i < 4; i++)
600 		kfree(p_dev->prod_id[i]);
601 	kfree(p_dev->devname);
602 	kfree(p_dev);
603  err_put:
604 	pcmcia_put_socket(s);
605 
606 	return NULL;
607 }
608 
609 
610 static int pcmcia_card_add(struct pcmcia_socket *s)
611 {
612 	cistpl_longlink_mfc_t mfc;
613 	unsigned int no_funcs, i, no_chains;
614 	int ret = -EAGAIN;
615 
616 	mutex_lock(&s->ops_mutex);
617 	if (!(s->resource_setup_done)) {
618 		dev_dbg(&s->dev,
619 			   "no resources available, delaying card_add\n");
620 		mutex_unlock(&s->ops_mutex);
621 		return -EAGAIN; /* try again, but later... */
622 	}
623 
624 	if (pcmcia_validate_mem(s)) {
625 		dev_dbg(&s->dev, "validating mem resources failed, "
626 		       "delaying card_add\n");
627 		mutex_unlock(&s->ops_mutex);
628 		return -EAGAIN; /* try again, but later... */
629 	}
630 	mutex_unlock(&s->ops_mutex);
631 
632 	ret = pccard_validate_cis(s, &no_chains);
633 	if (ret || !no_chains) {
634 		dev_dbg(&s->dev, "invalid CIS or invalid resources\n");
635 		return -ENODEV;
636 	}
637 
638 	if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
639 		no_funcs = mfc.nfn;
640 	else
641 		no_funcs = 1;
642 	s->functions = no_funcs;
643 
644 	for (i = 0; i < no_funcs; i++)
645 		pcmcia_device_add(s, i);
646 
647 	return ret;
648 }
649 
650 
651 static int pcmcia_requery_callback(struct device *dev, void * _data)
652 {
653 	struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
654 	if (!p_dev->dev.driver) {
655 		dev_dbg(dev, "update device information\n");
656 		pcmcia_device_query(p_dev);
657 	}
658 
659 	return 0;
660 }
661 
662 
663 static void pcmcia_requery(struct pcmcia_socket *s)
664 {
665 	int has_pfc;
666 
667 	if (s->functions == 0) {
668 		pcmcia_card_add(s);
669 		return;
670 	}
671 
672 	/* some device information might have changed because of a CIS
673 	 * update or because we can finally read it correctly... so
674 	 * determine it again, overwriting old values if necessary. */
675 	bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery_callback);
676 
677 	/* if the CIS changed, we need to check whether the number of
678 	 * functions changed. */
679 	if (s->fake_cis) {
680 		int old_funcs, new_funcs;
681 		cistpl_longlink_mfc_t mfc;
682 
683 		/* does this cis override add or remove functions? */
684 		old_funcs = s->functions;
685 
686 		if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC,
687 					&mfc))
688 			new_funcs = mfc.nfn;
689 		else
690 			new_funcs = 1;
691 		if (old_funcs != new_funcs) {
692 			/* we need to re-start */
693 			pcmcia_card_remove(s, NULL);
694 			s->functions = 0;
695 			pcmcia_card_add(s);
696 		}
697 	}
698 
699 	/* If the PCMCIA device consists of two pseudo devices,
700 	 * call pcmcia_device_add() -- which will fail if both
701 	 * devices are already registered. */
702 	mutex_lock(&s->ops_mutex);
703 	has_pfc = s->pcmcia_pfc;
704 	mutex_unlock(&s->ops_mutex);
705 	if (has_pfc)
706 		pcmcia_device_add(s, 0);
707 
708 	/* we re-scan all devices, not just the ones connected to this
709 	 * socket. This does not matter, though. */
710 	if (bus_rescan_devices(&pcmcia_bus_type))
711 		dev_warn(&s->dev, "rescanning the bus failed\n");
712 }
713 
714 
715 #ifdef CONFIG_PCMCIA_LOAD_CIS
716 
717 /**
718  * pcmcia_load_firmware - load CIS from userspace if device-provided is broken
719  * @dev: the pcmcia device which needs a CIS override
720  * @filename: requested filename in /lib/firmware/
721  *
722  * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if
723  * the one provided by the card is broken. The firmware files reside in
724  * /lib/firmware/ in userspace.
725  */
726 static int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
727 {
728 	struct pcmcia_socket *s = dev->socket;
729 	const struct firmware *fw;
730 	int ret = -ENOMEM;
731 	cistpl_longlink_mfc_t mfc;
732 	int old_funcs, new_funcs = 1;
733 
734 	if (!filename)
735 		return -EINVAL;
736 
737 	dev_dbg(&dev->dev, "trying to load CIS file %s\n", filename);
738 
739 	if (request_firmware(&fw, filename, &dev->dev) == 0) {
740 		if (fw->size >= CISTPL_MAX_CIS_SIZE) {
741 			ret = -EINVAL;
742 			dev_printk(KERN_ERR, &dev->dev,
743 				   "pcmcia: CIS override is too big\n");
744 			goto release;
745 		}
746 
747 		if (!pcmcia_replace_cis(s, fw->data, fw->size))
748 			ret = 0;
749 		else {
750 			dev_printk(KERN_ERR, &dev->dev,
751 				   "pcmcia: CIS override failed\n");
752 			goto release;
753 		}
754 
755 		/* we need to re-start if the number of functions changed */
756 		old_funcs = s->functions;
757 		if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC,
758 					&mfc))
759 			new_funcs = mfc.nfn;
760 
761 		if (old_funcs != new_funcs)
762 			ret = -EBUSY;
763 
764 		/* update information */
765 		pcmcia_device_query(dev);
766 
767 		/* requery (as number of functions might have changed) */
768 		pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY);
769 	}
770  release:
771 	release_firmware(fw);
772 
773 	return ret;
774 }
775 
776 #else /* !CONFIG_PCMCIA_LOAD_CIS */
777 
778 static inline int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
779 {
780 	return -ENODEV;
781 }
782 
783 #endif
784 
785 
786 static inline int pcmcia_devmatch(struct pcmcia_device *dev,
787 				  struct pcmcia_device_id *did)
788 {
789 	if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
790 		if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
791 			return 0;
792 	}
793 
794 	if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
795 		if ((!dev->has_card_id) || (dev->card_id != did->card_id))
796 			return 0;
797 	}
798 
799 	if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
800 		if (dev->func != did->function)
801 			return 0;
802 	}
803 
804 	if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
805 		if (!dev->prod_id[0])
806 			return 0;
807 		if (strcmp(did->prod_id[0], dev->prod_id[0]))
808 			return 0;
809 	}
810 
811 	if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
812 		if (!dev->prod_id[1])
813 			return 0;
814 		if (strcmp(did->prod_id[1], dev->prod_id[1]))
815 			return 0;
816 	}
817 
818 	if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
819 		if (!dev->prod_id[2])
820 			return 0;
821 		if (strcmp(did->prod_id[2], dev->prod_id[2]))
822 			return 0;
823 	}
824 
825 	if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
826 		if (!dev->prod_id[3])
827 			return 0;
828 		if (strcmp(did->prod_id[3], dev->prod_id[3]))
829 			return 0;
830 	}
831 
832 	if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
833 		dev_dbg(&dev->dev, "this is a pseudo-multi-function device\n");
834 		mutex_lock(&dev->socket->ops_mutex);
835 		dev->socket->pcmcia_pfc = 1;
836 		mutex_unlock(&dev->socket->ops_mutex);
837 		if (dev->device_no != did->device_no)
838 			return 0;
839 	}
840 
841 	if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
842 		int ret;
843 
844 		if ((!dev->has_func_id) || (dev->func_id != did->func_id))
845 			return 0;
846 
847 		/* if this is a pseudo-multi-function device,
848 		 * we need explicit matches */
849 		if (dev->socket->pcmcia_pfc)
850 			return 0;
851 		if (dev->device_no)
852 			return 0;
853 
854 		/* also, FUNC_ID matching needs to be activated by userspace
855 		 * after it has re-checked that there is no possible module
856 		 * with a prod_id/manf_id/card_id match.
857 		 */
858 		mutex_lock(&dev->socket->ops_mutex);
859 		ret = dev->allow_func_id_match;
860 		mutex_unlock(&dev->socket->ops_mutex);
861 
862 		if (!ret) {
863 			dev_dbg(&dev->dev,
864 				"skipping FUNC_ID match until userspace ACK\n");
865 			return 0;
866 		}
867 	}
868 
869 	if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
870 		dev_dbg(&dev->dev, "device needs a fake CIS\n");
871 		if (!dev->socket->fake_cis)
872 			if (pcmcia_load_firmware(dev, did->cisfile))
873 				return 0;
874 	}
875 
876 	if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
877 		int i;
878 		for (i = 0; i < 4; i++)
879 			if (dev->prod_id[i])
880 				return 0;
881 		if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
882 			return 0;
883 	}
884 
885 	return 1;
886 }
887 
888 
889 static int pcmcia_bus_match(struct device *dev, struct device_driver *drv)
890 {
891 	struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
892 	struct pcmcia_driver *p_drv = to_pcmcia_drv(drv);
893 	struct pcmcia_device_id *did = p_drv->id_table;
894 	struct pcmcia_dynid *dynid;
895 
896 	/* match dynamic devices first */
897 	mutex_lock(&p_drv->dynids.lock);
898 	list_for_each_entry(dynid, &p_drv->dynids.list, node) {
899 		dev_dbg(dev, "trying to match to %s\n", drv->name);
900 		if (pcmcia_devmatch(p_dev, &dynid->id)) {
901 			dev_dbg(dev, "matched to %s\n", drv->name);
902 			mutex_unlock(&p_drv->dynids.lock);
903 			return 1;
904 		}
905 	}
906 	mutex_unlock(&p_drv->dynids.lock);
907 
908 	while (did && did->match_flags) {
909 		dev_dbg(dev, "trying to match to %s\n", drv->name);
910 		if (pcmcia_devmatch(p_dev, did)) {
911 			dev_dbg(dev, "matched to %s\n", drv->name);
912 			return 1;
913 		}
914 		did++;
915 	}
916 
917 	return 0;
918 }
919 
920 #ifdef CONFIG_HOTPLUG
921 
922 static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
923 {
924 	struct pcmcia_device *p_dev;
925 	int i;
926 	u32 hash[4] = { 0, 0, 0, 0};
927 
928 	if (!dev)
929 		return -ENODEV;
930 
931 	p_dev = to_pcmcia_dev(dev);
932 
933 	/* calculate hashes */
934 	for (i = 0; i < 4; i++) {
935 		if (!p_dev->prod_id[i])
936 			continue;
937 		hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
938 	}
939 
940 	if (add_uevent_var(env, "SOCKET_NO=%u", p_dev->socket->sock))
941 		return -ENOMEM;
942 
943 	if (add_uevent_var(env, "DEVICE_NO=%02X", p_dev->device_no))
944 		return -ENOMEM;
945 
946 	if (add_uevent_var(env, "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
947 			   "pa%08Xpb%08Xpc%08Xpd%08X",
948 			   p_dev->has_manf_id ? p_dev->manf_id : 0,
949 			   p_dev->has_card_id ? p_dev->card_id : 0,
950 			   p_dev->has_func_id ? p_dev->func_id : 0,
951 			   p_dev->func,
952 			   p_dev->device_no,
953 			   hash[0],
954 			   hash[1],
955 			   hash[2],
956 			   hash[3]))
957 		return -ENOMEM;
958 
959 	return 0;
960 }
961 
962 #else
963 
964 static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
965 {
966 	return -ENODEV;
967 }
968 
969 #endif
970 
971 /************************ runtime PM support ***************************/
972 
973 static int pcmcia_dev_suspend(struct device *dev, pm_message_t state);
974 static int pcmcia_dev_resume(struct device *dev);
975 
976 static int runtime_suspend(struct device *dev)
977 {
978 	int rc;
979 
980 	device_lock(dev);
981 	rc = pcmcia_dev_suspend(dev, PMSG_SUSPEND);
982 	device_unlock(dev);
983 	return rc;
984 }
985 
986 static int runtime_resume(struct device *dev)
987 {
988 	int rc;
989 
990 	device_lock(dev);
991 	rc = pcmcia_dev_resume(dev);
992 	device_unlock(dev);
993 	return rc;
994 }
995 
996 /************************ per-device sysfs output ***************************/
997 
998 #define pcmcia_device_attr(field, test, format)				\
999 static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf)		\
1000 {									\
1001 	struct pcmcia_device *p_dev = to_pcmcia_dev(dev);		\
1002 	return p_dev->test ? sprintf(buf, format, p_dev->field) : -ENODEV; \
1003 }
1004 
1005 #define pcmcia_device_stringattr(name, field)					\
1006 static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf)		\
1007 {									\
1008 	struct pcmcia_device *p_dev = to_pcmcia_dev(dev);		\
1009 	return p_dev->field ? sprintf(buf, "%s\n", p_dev->field) : -ENODEV; \
1010 }
1011 
1012 pcmcia_device_attr(func, socket, "0x%02x\n");
1013 pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
1014 pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
1015 pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
1016 pcmcia_device_stringattr(prod_id1, prod_id[0]);
1017 pcmcia_device_stringattr(prod_id2, prod_id[1]);
1018 pcmcia_device_stringattr(prod_id3, prod_id[2]);
1019 pcmcia_device_stringattr(prod_id4, prod_id[3]);
1020 
1021 static ssize_t pcmcia_show_resources(struct device *dev,
1022 				     struct device_attribute *attr, char *buf)
1023 {
1024 	struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1025 	char *str = buf;
1026 	int i;
1027 
1028 	for (i = 0; i < PCMCIA_NUM_RESOURCES; i++)
1029 		str += sprintf(str, "%pr\n", p_dev->resource[i]);
1030 
1031 	return str - buf;
1032 }
1033 
1034 static ssize_t pcmcia_show_pm_state(struct device *dev, struct device_attribute *attr, char *buf)
1035 {
1036 	struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1037 
1038 	if (p_dev->suspended)
1039 		return sprintf(buf, "off\n");
1040 	else
1041 		return sprintf(buf, "on\n");
1042 }
1043 
1044 static ssize_t pcmcia_store_pm_state(struct device *dev, struct device_attribute *attr,
1045 				     const char *buf, size_t count)
1046 {
1047 	struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1048 	int ret = 0;
1049 
1050 	if (!count)
1051 		return -EINVAL;
1052 
1053 	if ((!p_dev->suspended) && !strncmp(buf, "off", 3))
1054 		ret = runtime_suspend(dev);
1055 	else if (p_dev->suspended && !strncmp(buf, "on", 2))
1056 		ret = runtime_resume(dev);
1057 
1058 	return ret ? ret : count;
1059 }
1060 
1061 
1062 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1063 {
1064 	struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1065 	int i;
1066 	u32 hash[4] = { 0, 0, 0, 0};
1067 
1068 	/* calculate hashes */
1069 	for (i = 0; i < 4; i++) {
1070 		if (!p_dev->prod_id[i])
1071 			continue;
1072 		hash[i] = crc32(0, p_dev->prod_id[i],
1073 				strlen(p_dev->prod_id[i]));
1074 	}
1075 	return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
1076 				"pa%08Xpb%08Xpc%08Xpd%08X\n",
1077 				p_dev->has_manf_id ? p_dev->manf_id : 0,
1078 				p_dev->has_card_id ? p_dev->card_id : 0,
1079 				p_dev->has_func_id ? p_dev->func_id : 0,
1080 				p_dev->func, p_dev->device_no,
1081 				hash[0], hash[1], hash[2], hash[3]);
1082 }
1083 
1084 static ssize_t pcmcia_store_allow_func_id_match(struct device *dev,
1085 		struct device_attribute *attr, const char *buf, size_t count)
1086 {
1087 	struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1088 
1089 	if (!count)
1090 		return -EINVAL;
1091 
1092 	mutex_lock(&p_dev->socket->ops_mutex);
1093 	p_dev->allow_func_id_match = 1;
1094 	mutex_unlock(&p_dev->socket->ops_mutex);
1095 	pcmcia_parse_uevents(p_dev->socket, PCMCIA_UEVENT_REQUERY);
1096 
1097 	return count;
1098 }
1099 
1100 static struct device_attribute pcmcia_dev_attrs[] = {
1101 	__ATTR(function, 0444, func_show, NULL),
1102 	__ATTR(pm_state, 0644, pcmcia_show_pm_state, pcmcia_store_pm_state),
1103 	__ATTR(resources, 0444, pcmcia_show_resources, NULL),
1104 	__ATTR_RO(func_id),
1105 	__ATTR_RO(manf_id),
1106 	__ATTR_RO(card_id),
1107 	__ATTR_RO(prod_id1),
1108 	__ATTR_RO(prod_id2),
1109 	__ATTR_RO(prod_id3),
1110 	__ATTR_RO(prod_id4),
1111 	__ATTR_RO(modalias),
1112 	__ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match),
1113 	__ATTR_NULL,
1114 };
1115 
1116 /* PM support, also needed for reset */
1117 
1118 static int pcmcia_dev_suspend(struct device *dev, pm_message_t state)
1119 {
1120 	struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1121 	struct pcmcia_driver *p_drv = NULL;
1122 	int ret = 0;
1123 
1124 	mutex_lock(&p_dev->socket->ops_mutex);
1125 	if (p_dev->suspended) {
1126 		mutex_unlock(&p_dev->socket->ops_mutex);
1127 		return 0;
1128 	}
1129 	p_dev->suspended = 1;
1130 	mutex_unlock(&p_dev->socket->ops_mutex);
1131 
1132 	dev_dbg(dev, "suspending\n");
1133 
1134 	if (dev->driver)
1135 		p_drv = to_pcmcia_drv(dev->driver);
1136 
1137 	if (!p_drv)
1138 		goto out;
1139 
1140 	if (p_drv->suspend) {
1141 		ret = p_drv->suspend(p_dev);
1142 		if (ret) {
1143 			dev_printk(KERN_ERR, dev,
1144 				   "pcmcia: device %s (driver %s) did "
1145 				   "not want to go to sleep (%d)\n",
1146 				   p_dev->devname, p_drv->name, ret);
1147 			mutex_lock(&p_dev->socket->ops_mutex);
1148 			p_dev->suspended = 0;
1149 			mutex_unlock(&p_dev->socket->ops_mutex);
1150 			goto out;
1151 		}
1152 	}
1153 
1154 	if (p_dev->device_no == p_dev->func) {
1155 		dev_dbg(dev, "releasing configuration\n");
1156 		pcmcia_release_configuration(p_dev);
1157 	}
1158 
1159  out:
1160 	return ret;
1161 }
1162 
1163 
1164 static int pcmcia_dev_resume(struct device *dev)
1165 {
1166 	struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1167 	struct pcmcia_driver *p_drv = NULL;
1168 	int ret = 0;
1169 
1170 	mutex_lock(&p_dev->socket->ops_mutex);
1171 	if (!p_dev->suspended) {
1172 		mutex_unlock(&p_dev->socket->ops_mutex);
1173 		return 0;
1174 	}
1175 	p_dev->suspended = 0;
1176 	mutex_unlock(&p_dev->socket->ops_mutex);
1177 
1178 	dev_dbg(dev, "resuming\n");
1179 
1180 	if (dev->driver)
1181 		p_drv = to_pcmcia_drv(dev->driver);
1182 
1183 	if (!p_drv)
1184 		goto out;
1185 
1186 	if (p_dev->device_no == p_dev->func) {
1187 		dev_dbg(dev, "requesting configuration\n");
1188 		ret = pcmcia_enable_device(p_dev);
1189 		if (ret)
1190 			goto out;
1191 	}
1192 
1193 	if (p_drv->resume)
1194 		ret = p_drv->resume(p_dev);
1195 
1196  out:
1197 	return ret;
1198 }
1199 
1200 
1201 static int pcmcia_bus_suspend_callback(struct device *dev, void * _data)
1202 {
1203 	struct pcmcia_socket *skt = _data;
1204 	struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1205 
1206 	if (p_dev->socket != skt || p_dev->suspended)
1207 		return 0;
1208 
1209 	return runtime_suspend(dev);
1210 }
1211 
1212 static int pcmcia_bus_resume_callback(struct device *dev, void * _data)
1213 {
1214 	struct pcmcia_socket *skt = _data;
1215 	struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1216 
1217 	if (p_dev->socket != skt || !p_dev->suspended)
1218 		return 0;
1219 
1220 	runtime_resume(dev);
1221 
1222 	return 0;
1223 }
1224 
1225 static int pcmcia_bus_resume(struct pcmcia_socket *skt)
1226 {
1227 	dev_dbg(&skt->dev, "resuming socket %d\n", skt->sock);
1228 	bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback);
1229 	return 0;
1230 }
1231 
1232 static int pcmcia_bus_suspend(struct pcmcia_socket *skt)
1233 {
1234 	dev_dbg(&skt->dev, "suspending socket %d\n", skt->sock);
1235 	if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt,
1236 			     pcmcia_bus_suspend_callback)) {
1237 		pcmcia_bus_resume(skt);
1238 		return -EIO;
1239 	}
1240 	return 0;
1241 }
1242 
1243 static int pcmcia_bus_remove(struct pcmcia_socket *skt)
1244 {
1245 	atomic_set(&skt->present, 0);
1246 	pcmcia_card_remove(skt, NULL);
1247 
1248 	mutex_lock(&skt->ops_mutex);
1249 	destroy_cis_cache(skt);
1250 	pcmcia_cleanup_irq(skt);
1251 	mutex_unlock(&skt->ops_mutex);
1252 
1253 	return 0;
1254 }
1255 
1256 static int pcmcia_bus_add(struct pcmcia_socket *skt)
1257 {
1258 	atomic_set(&skt->present, 1);
1259 
1260 	mutex_lock(&skt->ops_mutex);
1261 	skt->pcmcia_pfc = 0;
1262 	destroy_cis_cache(skt); /* to be on the safe side... */
1263 	mutex_unlock(&skt->ops_mutex);
1264 
1265 	pcmcia_card_add(skt);
1266 
1267 	return 0;
1268 }
1269 
1270 static int pcmcia_bus_early_resume(struct pcmcia_socket *skt)
1271 {
1272 	if (!verify_cis_cache(skt)) {
1273 		pcmcia_put_socket(skt);
1274 		return 0;
1275 	}
1276 
1277 	dev_dbg(&skt->dev, "cis mismatch - different card\n");
1278 
1279 	/* first, remove the card */
1280 	pcmcia_bus_remove(skt);
1281 
1282 	mutex_lock(&skt->ops_mutex);
1283 	destroy_cis_cache(skt);
1284 	kfree(skt->fake_cis);
1285 	skt->fake_cis = NULL;
1286 	skt->functions = 0;
1287 	mutex_unlock(&skt->ops_mutex);
1288 
1289 	/* now, add the new card */
1290 	pcmcia_bus_add(skt);
1291 	return 0;
1292 }
1293 
1294 
1295 /*
1296  * NOTE: This is racy. There's no guarantee the card will still be
1297  * physically present, even if the call to this function returns
1298  * non-NULL. Furthermore, the device driver most likely is unbound
1299  * almost immediately, so the timeframe where pcmcia_dev_present
1300  * returns NULL is probably really really small.
1301  */
1302 struct pcmcia_device *pcmcia_dev_present(struct pcmcia_device *_p_dev)
1303 {
1304 	struct pcmcia_device *p_dev;
1305 	struct pcmcia_device *ret = NULL;
1306 
1307 	p_dev = pcmcia_get_dev(_p_dev);
1308 	if (!p_dev)
1309 		return NULL;
1310 
1311 	if (atomic_read(&p_dev->socket->present) != 0)
1312 		ret = p_dev;
1313 
1314 	pcmcia_put_dev(p_dev);
1315 	return ret;
1316 }
1317 EXPORT_SYMBOL(pcmcia_dev_present);
1318 
1319 
1320 static struct pcmcia_callback pcmcia_bus_callback = {
1321 	.owner = THIS_MODULE,
1322 	.add = pcmcia_bus_add,
1323 	.remove = pcmcia_bus_remove,
1324 	.requery = pcmcia_requery,
1325 	.validate = pccard_validate_cis,
1326 	.suspend = pcmcia_bus_suspend,
1327 	.early_resume = pcmcia_bus_early_resume,
1328 	.resume = pcmcia_bus_resume,
1329 };
1330 
1331 static int __devinit pcmcia_bus_add_socket(struct device *dev,
1332 					   struct class_interface *class_intf)
1333 {
1334 	struct pcmcia_socket *socket = dev_get_drvdata(dev);
1335 	int ret;
1336 
1337 	socket = pcmcia_get_socket(socket);
1338 	if (!socket) {
1339 		dev_printk(KERN_ERR, dev,
1340 			   "PCMCIA obtaining reference to socket failed\n");
1341 		return -ENODEV;
1342 	}
1343 
1344 	ret = sysfs_create_bin_file(&dev->kobj, &pccard_cis_attr);
1345 	if (ret) {
1346 		dev_printk(KERN_ERR, dev, "PCMCIA registration failed\n");
1347 		pcmcia_put_socket(socket);
1348 		return ret;
1349 	}
1350 
1351 	INIT_LIST_HEAD(&socket->devices_list);
1352 	socket->pcmcia_pfc = 0;
1353 	socket->device_count = 0;
1354 	atomic_set(&socket->present, 0);
1355 
1356 	ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback);
1357 	if (ret) {
1358 		dev_printk(KERN_ERR, dev, "PCMCIA registration failed\n");
1359 		pcmcia_put_socket(socket);
1360 		return ret;
1361 	}
1362 
1363 	return 0;
1364 }
1365 
1366 static void pcmcia_bus_remove_socket(struct device *dev,
1367 				     struct class_interface *class_intf)
1368 {
1369 	struct pcmcia_socket *socket = dev_get_drvdata(dev);
1370 
1371 	if (!socket)
1372 		return;
1373 
1374 	pccard_register_pcmcia(socket, NULL);
1375 
1376 	/* unregister any unbound devices */
1377 	mutex_lock(&socket->skt_mutex);
1378 	pcmcia_card_remove(socket, NULL);
1379 	release_cis_mem(socket);
1380 	mutex_unlock(&socket->skt_mutex);
1381 
1382 	sysfs_remove_bin_file(&dev->kobj, &pccard_cis_attr);
1383 
1384 	pcmcia_put_socket(socket);
1385 
1386 	return;
1387 }
1388 
1389 
1390 /* the pcmcia_bus_interface is used to handle pcmcia socket devices */
1391 static struct class_interface pcmcia_bus_interface __refdata = {
1392 	.class = &pcmcia_socket_class,
1393 	.add_dev = &pcmcia_bus_add_socket,
1394 	.remove_dev = &pcmcia_bus_remove_socket,
1395 };
1396 
1397 
1398 struct bus_type pcmcia_bus_type = {
1399 	.name = "pcmcia",
1400 	.uevent = pcmcia_bus_uevent,
1401 	.match = pcmcia_bus_match,
1402 	.dev_attrs = pcmcia_dev_attrs,
1403 	.probe = pcmcia_device_probe,
1404 	.remove = pcmcia_device_remove,
1405 	.suspend = pcmcia_dev_suspend,
1406 	.resume = pcmcia_dev_resume,
1407 };
1408 
1409 
1410 static int __init init_pcmcia_bus(void)
1411 {
1412 	int ret;
1413 
1414 	ret = bus_register(&pcmcia_bus_type);
1415 	if (ret < 0) {
1416 		printk(KERN_WARNING "pcmcia: bus_register error: %d\n", ret);
1417 		return ret;
1418 	}
1419 	ret = class_interface_register(&pcmcia_bus_interface);
1420 	if (ret < 0) {
1421 		printk(KERN_WARNING
1422 			"pcmcia: class_interface_register error: %d\n", ret);
1423 		bus_unregister(&pcmcia_bus_type);
1424 		return ret;
1425 	}
1426 
1427 	return 0;
1428 }
1429 fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that
1430 			       * pcmcia_socket_class is already registered */
1431 
1432 
1433 static void __exit exit_pcmcia_bus(void)
1434 {
1435 	class_interface_unregister(&pcmcia_bus_interface);
1436 
1437 	bus_unregister(&pcmcia_bus_type);
1438 }
1439 module_exit(exit_pcmcia_bus);
1440 
1441 
1442 MODULE_ALIAS("ds");
1443