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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * ds.c -- 16-bit PCMCIA core support
4 *
5 * The initial developer of the original code is David A. Hinds
6 * <dahinds@users.sourceforge.net>. Portions created by David A. Hinds
7 * are Copyright (C) 1999 David A. Hinds. All Rights Reserved.
8 *
9 * (C) 1999 David A. Hinds
10 * (C) 2003 - 2010 Dominik Brodowski
11 */
12
13#include <linux/kernel.h>
14#include <linux/module.h>
15#include <linux/init.h>
16#include <linux/errno.h>
17#include <linux/list.h>
18#include <linux/delay.h>
19#include <linux/workqueue.h>
20#include <linux/crc32.h>
21#include <linux/firmware.h>
22#include <linux/kref.h>
23#include <linux/dma-mapping.h>
24#include <linux/slab.h>
25
26#include <pcmcia/cistpl.h>
27#include <pcmcia/ds.h>
28#include <pcmcia/ss.h>
29
30#include "cs_internal.h"
31
32/*====================================================================*/
33
34/* Module parameters */
35
36MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
37MODULE_DESCRIPTION("PCMCIA Driver Services");
38MODULE_LICENSE("GPL");
39
40
41/*====================================================================*/
42
43static void pcmcia_check_driver(struct pcmcia_driver *p_drv)
44{
45 const struct pcmcia_device_id *did = p_drv->id_table;
46 unsigned int i;
47 u32 hash;
48
49 if (!p_drv->probe || !p_drv->remove)
50 printk(KERN_DEBUG "pcmcia: %s lacks a requisite callback "
51 "function\n", p_drv->name);
52
53 while (did && did->match_flags) {
54 for (i = 0; i < 4; i++) {
55 if (!did->prod_id[i])
56 continue;
57
58 hash = crc32(0, did->prod_id[i], strlen(did->prod_id[i]));
59 if (hash == did->prod_id_hash[i])
60 continue;
61
62 printk(KERN_DEBUG "pcmcia: %s: invalid hash for "
63 "product string \"%s\": is 0x%x, should "
64 "be 0x%x\n", p_drv->name, did->prod_id[i],
65 did->prod_id_hash[i], hash);
66 printk(KERN_DEBUG "pcmcia: see "
67 "Documentation/pcmcia/devicetable.rst for "
68 "details\n");
69 }
70 did++;
71 }
72
73 return;
74}
75
76
77/*======================================================================*/
78
79
80struct pcmcia_dynid {
81 struct list_head node;
82 struct pcmcia_device_id id;
83};
84
85/**
86 * new_id_store() - add a new PCMCIA device ID to this driver and re-probe devices
87 * @driver: target device driver
88 * @buf: buffer for scanning device ID data
89 * @count: input size
90 *
91 * Adds a new dynamic PCMCIA device ID to this driver,
92 * and causes the driver to probe for all devices again.
93 */
94static ssize_t
95new_id_store(struct device_driver *driver, const char *buf, size_t count)
96{
97 struct pcmcia_dynid *dynid;
98 struct pcmcia_driver *pdrv = to_pcmcia_drv(driver);
99 __u16 match_flags, manf_id, card_id;
100 __u8 func_id, function, device_no;
101 __u32 prod_id_hash[4] = {0, 0, 0, 0};
102 int fields = 0;
103 int retval = 0;
104
105 fields = sscanf(buf, "%hx %hx %hx %hhx %hhx %hhx %x %x %x %x",
106 &match_flags, &manf_id, &card_id, &func_id, &function, &device_no,
107 &prod_id_hash[0], &prod_id_hash[1], &prod_id_hash[2], &prod_id_hash[3]);
108 if (fields < 6)
109 return -EINVAL;
110
111 dynid = kzalloc(sizeof(struct pcmcia_dynid), GFP_KERNEL);
112 if (!dynid)
113 return -ENOMEM;
114
115 dynid->id.match_flags = match_flags;
116 dynid->id.manf_id = manf_id;
117 dynid->id.card_id = card_id;
118 dynid->id.func_id = func_id;
119 dynid->id.function = function;
120 dynid->id.device_no = device_no;
121 memcpy(dynid->id.prod_id_hash, prod_id_hash, sizeof(__u32) * 4);
122
123 mutex_lock(&pdrv->dynids.lock);
124 list_add_tail(&dynid->node, &pdrv->dynids.list);
125 mutex_unlock(&pdrv->dynids.lock);
126
127 retval = driver_attach(&pdrv->drv);
128
129 if (retval)
130 return retval;
131 return count;
132}
133static DRIVER_ATTR_WO(new_id);
134
135static void
136pcmcia_free_dynids(struct pcmcia_driver *drv)
137{
138 struct pcmcia_dynid *dynid, *n;
139
140 mutex_lock(&drv->dynids.lock);
141 list_for_each_entry_safe(dynid, n, &drv->dynids.list, node) {
142 list_del(&dynid->node);
143 kfree(dynid);
144 }
145 mutex_unlock(&drv->dynids.lock);
146}
147
148static int
149pcmcia_create_newid_file(struct pcmcia_driver *drv)
150{
151 int error = 0;
152 if (drv->probe != NULL)
153 error = driver_create_file(&drv->drv, &driver_attr_new_id);
154 return error;
155}
156
157static void
158pcmcia_remove_newid_file(struct pcmcia_driver *drv)
159{
160 driver_remove_file(&drv->drv, &driver_attr_new_id);
161}
162
163/**
164 * pcmcia_register_driver - register a PCMCIA driver with the bus core
165 * @driver: the &driver being registered
166 *
167 * Registers a PCMCIA driver with the PCMCIA bus core.
168 */
169int pcmcia_register_driver(struct pcmcia_driver *driver)
170{
171 int error;
172
173 if (!driver)
174 return -EINVAL;
175
176 pcmcia_check_driver(driver);
177
178 /* initialize common fields */
179 driver->drv.bus = &pcmcia_bus_type;
180 driver->drv.owner = driver->owner;
181 driver->drv.name = driver->name;
182 mutex_init(&driver->dynids.lock);
183 INIT_LIST_HEAD(&driver->dynids.list);
184
185 pr_debug("registering driver %s\n", driver->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}
197EXPORT_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 */
203void pcmcia_unregister_driver(struct pcmcia_driver *driver)
204{
205 pr_debug("unregistering driver %s\n", driver->name);
206 pcmcia_remove_newid_file(driver);
207 driver_unregister(&driver->drv);
208 pcmcia_free_dynids(driver);
209}
210EXPORT_SYMBOL(pcmcia_unregister_driver);
211
212
213/* pcmcia_device handling */
214
215static 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
224static void pcmcia_put_dev(struct pcmcia_device *p_dev)
225{
226 if (p_dev)
227 put_device(&p_dev->dev);
228}
229
230static 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
237static 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
251static 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_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
308put_module:
309 if (ret)
310 module_put(p_drv->owner);
311put_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 */
321static 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
353static void 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->remove)
375 p_drv->remove(p_dev);
376
377 /* check for proper unloading */
378 if (p_dev->_irq || p_dev->_io || p_dev->_locked)
379 dev_info(dev,
380 "pcmcia: driver %s did not release config properly\n",
381 p_drv->name);
382
383 for (i = 0; i < MAX_WIN; i++)
384 if (p_dev->_win & CLIENT_WIN_REQ(i))
385 dev_info(dev,
386 "pcmcia: driver %s did not release window properly\n",
387 p_drv->name);
388
389 /* references from pcmcia_device_probe */
390 pcmcia_put_dev(p_dev);
391 module_put(p_drv->owner);
392}
393
394
395/*
396 * pcmcia_device_query -- determine information about a pcmcia device
397 */
398static int pcmcia_device_query(struct pcmcia_device *p_dev)
399{
400 cistpl_manfid_t manf_id;
401 cistpl_funcid_t func_id;
402 cistpl_vers_1_t *vers1;
403 unsigned int i;
404
405 vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL);
406 if (!vers1)
407 return -ENOMEM;
408
409 if (!pccard_read_tuple(p_dev->socket, BIND_FN_ALL,
410 CISTPL_MANFID, &manf_id)) {
411 mutex_lock(&p_dev->socket->ops_mutex);
412 p_dev->manf_id = manf_id.manf;
413 p_dev->card_id = manf_id.card;
414 p_dev->has_manf_id = 1;
415 p_dev->has_card_id = 1;
416 mutex_unlock(&p_dev->socket->ops_mutex);
417 }
418
419 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
420 CISTPL_FUNCID, &func_id)) {
421 mutex_lock(&p_dev->socket->ops_mutex);
422 p_dev->func_id = func_id.func;
423 p_dev->has_func_id = 1;
424 mutex_unlock(&p_dev->socket->ops_mutex);
425 } else {
426 /* rule of thumb: cards with no FUNCID, but with
427 * common memory device geometry information, are
428 * probably memory cards (from pcmcia-cs) */
429 cistpl_device_geo_t *devgeo;
430
431 devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL);
432 if (!devgeo) {
433 kfree(vers1);
434 return -ENOMEM;
435 }
436 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
437 CISTPL_DEVICE_GEO, devgeo)) {
438 dev_dbg(&p_dev->dev,
439 "mem device geometry probably means "
440 "FUNCID_MEMORY\n");
441 mutex_lock(&p_dev->socket->ops_mutex);
442 p_dev->func_id = CISTPL_FUNCID_MEMORY;
443 p_dev->has_func_id = 1;
444 mutex_unlock(&p_dev->socket->ops_mutex);
445 }
446 kfree(devgeo);
447 }
448
449 if (!pccard_read_tuple(p_dev->socket, BIND_FN_ALL, CISTPL_VERS_1,
450 vers1)) {
451 mutex_lock(&p_dev->socket->ops_mutex);
452 for (i = 0; i < min_t(unsigned int, 4, vers1->ns); i++) {
453 char *tmp;
454 unsigned int length;
455 char *new;
456
457 tmp = vers1->str + vers1->ofs[i];
458
459 length = strlen(tmp) + 1;
460 if ((length < 2) || (length > 255))
461 continue;
462
463 new = kstrdup(tmp, GFP_KERNEL);
464 if (!new)
465 continue;
466
467 tmp = p_dev->prod_id[i];
468 p_dev->prod_id[i] = new;
469 kfree(tmp);
470 }
471 mutex_unlock(&p_dev->socket->ops_mutex);
472 }
473
474 kfree(vers1);
475 return 0;
476}
477
478
479static struct pcmcia_device *pcmcia_device_add(struct pcmcia_socket *s,
480 unsigned int function)
481{
482 struct pcmcia_device *p_dev, *tmp_dev;
483 int i;
484
485 s = pcmcia_get_socket(s);
486 if (!s)
487 return NULL;
488
489 pr_debug("adding device to %d, function %d\n", s->sock, function);
490
491 p_dev = kzalloc(sizeof(struct pcmcia_device), GFP_KERNEL);
492 if (!p_dev)
493 goto err_put;
494
495 mutex_lock(&s->ops_mutex);
496 p_dev->device_no = (s->device_count++);
497 mutex_unlock(&s->ops_mutex);
498
499 /* max of 2 PFC devices */
500 if ((p_dev->device_no >= 2) && (function == 0))
501 goto err_free;
502
503 /* max of 4 devices overall */
504 if (p_dev->device_no >= 4)
505 goto err_free;
506
507 p_dev->socket = s;
508 p_dev->func = function;
509
510 p_dev->dev.bus = &pcmcia_bus_type;
511 p_dev->dev.parent = s->dev.parent;
512 p_dev->dev.release = pcmcia_release_dev;
513 /* by default don't allow DMA */
514 p_dev->dma_mask = 0;
515 p_dev->dev.dma_mask = &p_dev->dma_mask;
516 p_dev->devname = kasprintf(GFP_KERNEL, "pcmcia%s", dev_name(&p_dev->dev));
517 if (!p_dev->devname)
518 goto err_free;
519 dev_dbg(&p_dev->dev, "devname is %s\n", p_dev->devname);
520
521 mutex_lock(&s->ops_mutex);
522
523 /*
524 * p_dev->function_config must be the same for all card functions.
525 * Note that this is serialized by ops_mutex, so that only one
526 * such struct will be created.
527 */
528 list_for_each_entry(tmp_dev, &s->devices_list, socket_device_list)
529 if (p_dev->func == tmp_dev->func) {
530 p_dev->function_config = tmp_dev->function_config;
531 p_dev->irq = tmp_dev->irq;
532 kref_get(&p_dev->function_config->ref);
533 }
534
535 /* Add to the list in pcmcia_bus_socket */
536 list_add(&p_dev->socket_device_list, &s->devices_list);
537
538 if (pcmcia_setup_irq(p_dev))
539 dev_warn(&p_dev->dev,
540 "IRQ setup failed -- device might not work\n");
541
542 if (!p_dev->function_config) {
543 config_t *c;
544 dev_dbg(&p_dev->dev, "creating config_t\n");
545 c = kzalloc(sizeof(struct config_t), GFP_KERNEL);
546 if (!c) {
547 mutex_unlock(&s->ops_mutex);
548 goto err_unreg;
549 }
550 p_dev->function_config = c;
551 kref_init(&c->ref);
552 for (i = 0; i < MAX_IO_WIN; i++) {
553 c->io[i].name = p_dev->devname;
554 c->io[i].flags = IORESOURCE_IO;
555 }
556 for (i = 0; i < MAX_WIN; i++) {
557 c->mem[i].name = p_dev->devname;
558 c->mem[i].flags = IORESOURCE_MEM;
559 }
560 }
561 for (i = 0; i < MAX_IO_WIN; i++)
562 p_dev->resource[i] = &p_dev->function_config->io[i];
563 for (; i < (MAX_IO_WIN + MAX_WIN); i++)
564 p_dev->resource[i] = &p_dev->function_config->mem[i-MAX_IO_WIN];
565
566 mutex_unlock(&s->ops_mutex);
567
568 dev_notice(&p_dev->dev, "pcmcia: registering new device %s (IRQ: %d)\n",
569 p_dev->devname, p_dev->irq);
570
571 pcmcia_device_query(p_dev);
572
573 dev_set_name(&p_dev->dev, "%d.%d", p_dev->socket->sock, p_dev->device_no);
574 if (device_register(&p_dev->dev)) {
575 mutex_lock(&s->ops_mutex);
576 list_del(&p_dev->socket_device_list);
577 s->device_count--;
578 mutex_unlock(&s->ops_mutex);
579 put_device(&p_dev->dev);
580 return NULL;
581 }
582
583 return p_dev;
584
585 err_unreg:
586 mutex_lock(&s->ops_mutex);
587 list_del(&p_dev->socket_device_list);
588 mutex_unlock(&s->ops_mutex);
589
590 err_free:
591 mutex_lock(&s->ops_mutex);
592 s->device_count--;
593 mutex_unlock(&s->ops_mutex);
594
595 for (i = 0; i < 4; i++)
596 kfree(p_dev->prod_id[i]);
597 kfree(p_dev->devname);
598 kfree(p_dev);
599 err_put:
600 pcmcia_put_socket(s);
601
602 return NULL;
603}
604
605
606static int pcmcia_card_add(struct pcmcia_socket *s)
607{
608 cistpl_longlink_mfc_t mfc;
609 unsigned int no_funcs, i, no_chains;
610 int ret = -EAGAIN;
611
612 mutex_lock(&s->ops_mutex);
613 if (!(s->resource_setup_done)) {
614 dev_dbg(&s->dev,
615 "no resources available, delaying card_add\n");
616 mutex_unlock(&s->ops_mutex);
617 return -EAGAIN; /* try again, but later... */
618 }
619
620 if (pcmcia_validate_mem(s)) {
621 dev_dbg(&s->dev, "validating mem resources failed, "
622 "delaying card_add\n");
623 mutex_unlock(&s->ops_mutex);
624 return -EAGAIN; /* try again, but later... */
625 }
626 mutex_unlock(&s->ops_mutex);
627
628 ret = pccard_validate_cis(s, &no_chains);
629 if (ret || !no_chains) {
630#if defined(CONFIG_MTD_PCMCIA_ANONYMOUS)
631 /* Set up as an anonymous card. If we don't have anonymous
632 memory support then just error the card as there is no
633 point trying to second guess.
634
635 Note: some cards have just a device entry, it may be
636 worth extending support to cover these in future */
637 if (ret == -EIO) {
638 dev_info(&s->dev, "no CIS, assuming an anonymous memory card.\n");
639 pcmcia_replace_cis(s, "\xFF", 1);
640 no_chains = 1;
641 ret = 0;
642 } else
643#endif
644 {
645 dev_dbg(&s->dev, "invalid CIS or invalid resources\n");
646 return -ENODEV;
647 }
648 }
649
650 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
651 no_funcs = mfc.nfn;
652 else
653 no_funcs = 1;
654 s->functions = no_funcs;
655
656 for (i = 0; i < no_funcs; i++)
657 pcmcia_device_add(s, i);
658
659 return ret;
660}
661
662
663static int pcmcia_requery_callback(struct device *dev, void *_data)
664{
665 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
666 if (!p_dev->dev.driver) {
667 dev_dbg(dev, "update device information\n");
668 pcmcia_device_query(p_dev);
669 }
670
671 return 0;
672}
673
674
675static void pcmcia_requery(struct pcmcia_socket *s)
676{
677 int has_pfc;
678
679 if (!(s->state & SOCKET_PRESENT))
680 return;
681
682 if (s->functions == 0) {
683 pcmcia_card_add(s);
684 return;
685 }
686
687 /* some device information might have changed because of a CIS
688 * update or because we can finally read it correctly... so
689 * determine it again, overwriting old values if necessary. */
690 bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery_callback);
691
692 /* if the CIS changed, we need to check whether the number of
693 * functions changed. */
694 if (s->fake_cis) {
695 int old_funcs, new_funcs;
696 cistpl_longlink_mfc_t mfc;
697
698 /* does this cis override add or remove functions? */
699 old_funcs = s->functions;
700
701 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC,
702 &mfc))
703 new_funcs = mfc.nfn;
704 else
705 new_funcs = 1;
706 if (old_funcs != new_funcs) {
707 /* we need to re-start */
708 pcmcia_card_remove(s, NULL);
709 s->functions = 0;
710 pcmcia_card_add(s);
711 }
712 }
713
714 /* If the PCMCIA device consists of two pseudo devices,
715 * call pcmcia_device_add() -- which will fail if both
716 * devices are already registered. */
717 mutex_lock(&s->ops_mutex);
718 has_pfc = s->pcmcia_pfc;
719 mutex_unlock(&s->ops_mutex);
720 if (has_pfc)
721 pcmcia_device_add(s, 0);
722
723 /* we re-scan all devices, not just the ones connected to this
724 * socket. This does not matter, though. */
725 if (bus_rescan_devices(&pcmcia_bus_type))
726 dev_warn(&s->dev, "rescanning the bus failed\n");
727}
728
729
730#ifdef CONFIG_PCMCIA_LOAD_CIS
731
732/**
733 * pcmcia_load_firmware - load CIS from userspace if device-provided is broken
734 * @dev: the pcmcia device which needs a CIS override
735 * @filename: requested filename in /lib/firmware/
736 *
737 * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if
738 * the one provided by the card is broken. The firmware files reside in
739 * /lib/firmware/ in userspace.
740 */
741static int pcmcia_load_firmware(struct pcmcia_device *dev, char *filename)
742{
743 struct pcmcia_socket *s = dev->socket;
744 const struct firmware *fw;
745 int ret = -ENOMEM;
746 cistpl_longlink_mfc_t mfc;
747 int old_funcs, new_funcs = 1;
748
749 if (!filename)
750 return -EINVAL;
751
752 dev_dbg(&dev->dev, "trying to load CIS file %s\n", filename);
753
754 if (request_firmware(&fw, filename, &dev->dev) == 0) {
755 if (fw->size >= CISTPL_MAX_CIS_SIZE) {
756 ret = -EINVAL;
757 dev_err(&dev->dev, "pcmcia: CIS override is too big\n");
758 goto release;
759 }
760
761 if (!pcmcia_replace_cis(s, fw->data, fw->size))
762 ret = 0;
763 else {
764 dev_err(&dev->dev, "pcmcia: CIS override failed\n");
765 goto release;
766 }
767
768 /* we need to re-start if the number of functions changed */
769 old_funcs = s->functions;
770 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC,
771 &mfc))
772 new_funcs = mfc.nfn;
773
774 if (old_funcs != new_funcs)
775 ret = -EBUSY;
776
777 /* update information */
778 pcmcia_device_query(dev);
779
780 /* requery (as number of functions might have changed) */
781 pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY);
782 }
783 release:
784 release_firmware(fw);
785
786 return ret;
787}
788
789#else /* !CONFIG_PCMCIA_LOAD_CIS */
790
791static inline int pcmcia_load_firmware(struct pcmcia_device *dev,
792 char *filename)
793{
794 return -ENODEV;
795}
796
797#endif
798
799
800static inline int pcmcia_devmatch(struct pcmcia_device *dev,
801 const struct pcmcia_device_id *did)
802{
803 if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
804 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
805 return 0;
806 }
807
808 if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
809 if ((!dev->has_card_id) || (dev->card_id != did->card_id))
810 return 0;
811 }
812
813 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
814 if (dev->func != did->function)
815 return 0;
816 }
817
818 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
819 if (!dev->prod_id[0])
820 return 0;
821 if (strcmp(did->prod_id[0], dev->prod_id[0]))
822 return 0;
823 }
824
825 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
826 if (!dev->prod_id[1])
827 return 0;
828 if (strcmp(did->prod_id[1], dev->prod_id[1]))
829 return 0;
830 }
831
832 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
833 if (!dev->prod_id[2])
834 return 0;
835 if (strcmp(did->prod_id[2], dev->prod_id[2]))
836 return 0;
837 }
838
839 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
840 if (!dev->prod_id[3])
841 return 0;
842 if (strcmp(did->prod_id[3], dev->prod_id[3]))
843 return 0;
844 }
845
846 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
847 dev_dbg(&dev->dev, "this is a pseudo-multi-function device\n");
848 mutex_lock(&dev->socket->ops_mutex);
849 dev->socket->pcmcia_pfc = 1;
850 mutex_unlock(&dev->socket->ops_mutex);
851 if (dev->device_no != did->device_no)
852 return 0;
853 }
854
855 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
856 int ret;
857
858 if ((!dev->has_func_id) || (dev->func_id != did->func_id))
859 return 0;
860
861 /* if this is a pseudo-multi-function device,
862 * we need explicit matches */
863 if (dev->socket->pcmcia_pfc)
864 return 0;
865 if (dev->device_no)
866 return 0;
867
868 /* also, FUNC_ID matching needs to be activated by userspace
869 * after it has re-checked that there is no possible module
870 * with a prod_id/manf_id/card_id match.
871 */
872 mutex_lock(&dev->socket->ops_mutex);
873 ret = dev->allow_func_id_match;
874 mutex_unlock(&dev->socket->ops_mutex);
875
876 if (!ret) {
877 dev_dbg(&dev->dev,
878 "skipping FUNC_ID match until userspace ACK\n");
879 return 0;
880 }
881 }
882
883 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
884 dev_dbg(&dev->dev, "device needs a fake CIS\n");
885 if (!dev->socket->fake_cis)
886 if (pcmcia_load_firmware(dev, did->cisfile))
887 return 0;
888 }
889
890 if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
891 int i;
892 for (i = 0; i < 4; i++)
893 if (dev->prod_id[i])
894 return 0;
895 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
896 return 0;
897 }
898
899 return 1;
900}
901
902
903static int pcmcia_bus_match(struct device *dev, const struct device_driver *drv)
904{
905 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
906 struct pcmcia_driver *p_drv = to_pcmcia_drv(drv);
907 const struct pcmcia_device_id *did = p_drv->id_table;
908 struct pcmcia_dynid *dynid;
909
910 /* match dynamic devices first */
911 mutex_lock(&p_drv->dynids.lock);
912 list_for_each_entry(dynid, &p_drv->dynids.list, node) {
913 dev_dbg(dev, "trying to match to %s\n", drv->name);
914 if (pcmcia_devmatch(p_dev, &dynid->id)) {
915 dev_dbg(dev, "matched to %s\n", drv->name);
916 mutex_unlock(&p_drv->dynids.lock);
917 return 1;
918 }
919 }
920 mutex_unlock(&p_drv->dynids.lock);
921
922 while (did && did->match_flags) {
923 dev_dbg(dev, "trying to match to %s\n", drv->name);
924 if (pcmcia_devmatch(p_dev, did)) {
925 dev_dbg(dev, "matched to %s\n", drv->name);
926 return 1;
927 }
928 did++;
929 }
930
931 return 0;
932}
933
934static int pcmcia_bus_uevent(const struct device *dev, struct kobj_uevent_env *env)
935{
936 const struct pcmcia_device *p_dev;
937 int i;
938 u32 hash[4] = { 0, 0, 0, 0};
939
940 if (!dev)
941 return -ENODEV;
942
943 p_dev = to_pcmcia_dev(dev);
944
945 /* calculate hashes */
946 for (i = 0; i < 4; i++) {
947 if (!p_dev->prod_id[i])
948 continue;
949 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
950 }
951
952 if (add_uevent_var(env, "SOCKET_NO=%u", p_dev->socket->sock))
953 return -ENOMEM;
954
955 if (add_uevent_var(env, "DEVICE_NO=%02X", p_dev->device_no))
956 return -ENOMEM;
957
958 if (add_uevent_var(env, "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
959 "pa%08Xpb%08Xpc%08Xpd%08X",
960 p_dev->has_manf_id ? p_dev->manf_id : 0,
961 p_dev->has_card_id ? p_dev->card_id : 0,
962 p_dev->has_func_id ? p_dev->func_id : 0,
963 p_dev->func,
964 p_dev->device_no,
965 hash[0],
966 hash[1],
967 hash[2],
968 hash[3]))
969 return -ENOMEM;
970
971 return 0;
972}
973
974/************************ runtime PM support ***************************/
975
976static int pcmcia_dev_suspend(struct device *dev);
977static int pcmcia_dev_resume(struct device *dev);
978
979static int runtime_suspend(struct device *dev)
980{
981 int rc;
982
983 device_lock(dev);
984 rc = pcmcia_dev_suspend(dev);
985 device_unlock(dev);
986 return rc;
987}
988
989static int runtime_resume(struct device *dev)
990{
991 int rc;
992
993 device_lock(dev);
994 rc = pcmcia_dev_resume(dev);
995 device_unlock(dev);
996 return rc;
997}
998
999/************************ per-device sysfs output ***************************/
1000
1001#define pcmcia_device_attr(field, test, format) \
1002static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf) \
1003{ \
1004 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
1005 return p_dev->test ? sysfs_emit(buf, format, p_dev->field) : -ENODEV; \
1006} \
1007static DEVICE_ATTR_RO(field);
1008
1009#define pcmcia_device_stringattr(name, field) \
1010static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf) \
1011{ \
1012 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
1013 return p_dev->field ? sysfs_emit(buf, "%s\n", p_dev->field) : -ENODEV; \
1014} \
1015static DEVICE_ATTR_RO(name);
1016
1017pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
1018pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
1019pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
1020pcmcia_device_stringattr(prod_id1, prod_id[0]);
1021pcmcia_device_stringattr(prod_id2, prod_id[1]);
1022pcmcia_device_stringattr(prod_id3, prod_id[2]);
1023pcmcia_device_stringattr(prod_id4, prod_id[3]);
1024
1025static ssize_t function_show(struct device *dev, struct device_attribute *attr,
1026 char *buf)
1027{
1028 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1029 return p_dev->socket ? sysfs_emit(buf, "0x%02x\n", p_dev->func) : -ENODEV;
1030}
1031static DEVICE_ATTR_RO(function);
1032
1033static ssize_t resources_show(struct device *dev,
1034 struct device_attribute *attr, char *buf)
1035{
1036 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1037 int i, at = 0;
1038
1039 for (i = 0; i < PCMCIA_NUM_RESOURCES; i++)
1040 at += sysfs_emit_at(buf, at, "%pr\n", p_dev->resource[i]);
1041
1042 return at;
1043}
1044static DEVICE_ATTR_RO(resources);
1045
1046static ssize_t pm_state_show(struct device *dev, struct device_attribute *attr, char *buf)
1047{
1048 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1049
1050 if (p_dev->suspended)
1051 return sysfs_emit(buf, "off\n");
1052 else
1053 return sysfs_emit(buf, "on\n");
1054}
1055
1056static ssize_t pm_state_store(struct device *dev, struct device_attribute *attr,
1057 const char *buf, size_t count)
1058{
1059 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1060 int ret = 0;
1061
1062 if (!count)
1063 return -EINVAL;
1064
1065 if ((!p_dev->suspended) && !strncmp(buf, "off", 3))
1066 ret = runtime_suspend(dev);
1067 else if (p_dev->suspended && !strncmp(buf, "on", 2))
1068 ret = runtime_resume(dev);
1069
1070 return ret ? ret : count;
1071}
1072static DEVICE_ATTR_RW(pm_state);
1073
1074static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1075{
1076 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1077 int i;
1078 u32 hash[4] = { 0, 0, 0, 0};
1079
1080 /* calculate hashes */
1081 for (i = 0; i < 4; i++) {
1082 if (!p_dev->prod_id[i])
1083 continue;
1084 hash[i] = crc32(0, p_dev->prod_id[i],
1085 strlen(p_dev->prod_id[i]));
1086 }
1087 return sysfs_emit(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02Xpa%08Xpb%08Xpc%08Xpd%08X\n",
1088 p_dev->has_manf_id ? p_dev->manf_id : 0,
1089 p_dev->has_card_id ? p_dev->card_id : 0,
1090 p_dev->has_func_id ? p_dev->func_id : 0,
1091 p_dev->func, p_dev->device_no,
1092 hash[0], hash[1], hash[2], hash[3]);
1093}
1094static DEVICE_ATTR_RO(modalias);
1095
1096static ssize_t allow_func_id_match_store(struct device *dev,
1097 struct device_attribute *attr, const char *buf, size_t count)
1098{
1099 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1100
1101 if (!count)
1102 return -EINVAL;
1103
1104 mutex_lock(&p_dev->socket->ops_mutex);
1105 p_dev->allow_func_id_match = 1;
1106 mutex_unlock(&p_dev->socket->ops_mutex);
1107 pcmcia_parse_uevents(p_dev->socket, PCMCIA_UEVENT_REQUERY);
1108
1109 return count;
1110}
1111static DEVICE_ATTR_WO(allow_func_id_match);
1112
1113static struct attribute *pcmcia_dev_attrs[] = {
1114 &dev_attr_resources.attr,
1115 &dev_attr_pm_state.attr,
1116 &dev_attr_function.attr,
1117 &dev_attr_func_id.attr,
1118 &dev_attr_manf_id.attr,
1119 &dev_attr_card_id.attr,
1120 &dev_attr_prod_id1.attr,
1121 &dev_attr_prod_id2.attr,
1122 &dev_attr_prod_id3.attr,
1123 &dev_attr_prod_id4.attr,
1124 &dev_attr_modalias.attr,
1125 &dev_attr_allow_func_id_match.attr,
1126 NULL,
1127};
1128ATTRIBUTE_GROUPS(pcmcia_dev);
1129
1130/* PM support, also needed for reset */
1131
1132static int pcmcia_dev_suspend(struct device *dev)
1133{
1134 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1135 struct pcmcia_driver *p_drv = NULL;
1136 int ret = 0;
1137
1138 mutex_lock(&p_dev->socket->ops_mutex);
1139 if (p_dev->suspended) {
1140 mutex_unlock(&p_dev->socket->ops_mutex);
1141 return 0;
1142 }
1143 p_dev->suspended = 1;
1144 mutex_unlock(&p_dev->socket->ops_mutex);
1145
1146 dev_dbg(dev, "suspending\n");
1147
1148 if (dev->driver)
1149 p_drv = to_pcmcia_drv(dev->driver);
1150
1151 if (!p_drv)
1152 goto out;
1153
1154 if (p_drv->suspend) {
1155 ret = p_drv->suspend(p_dev);
1156 if (ret) {
1157 dev_err(dev,
1158 "pcmcia: device %s (driver %s) did not want to go to sleep (%d)\n",
1159 p_dev->devname, p_drv->name, ret);
1160 mutex_lock(&p_dev->socket->ops_mutex);
1161 p_dev->suspended = 0;
1162 mutex_unlock(&p_dev->socket->ops_mutex);
1163 goto out;
1164 }
1165 }
1166
1167 if (p_dev->device_no == p_dev->func) {
1168 dev_dbg(dev, "releasing configuration\n");
1169 pcmcia_release_configuration(p_dev);
1170 }
1171
1172 out:
1173 return ret;
1174}
1175
1176
1177static int pcmcia_dev_resume(struct device *dev)
1178{
1179 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1180 struct pcmcia_driver *p_drv = NULL;
1181 int ret = 0;
1182
1183 mutex_lock(&p_dev->socket->ops_mutex);
1184 if (!p_dev->suspended) {
1185 mutex_unlock(&p_dev->socket->ops_mutex);
1186 return 0;
1187 }
1188 p_dev->suspended = 0;
1189 mutex_unlock(&p_dev->socket->ops_mutex);
1190
1191 dev_dbg(dev, "resuming\n");
1192
1193 if (dev->driver)
1194 p_drv = to_pcmcia_drv(dev->driver);
1195
1196 if (!p_drv)
1197 goto out;
1198
1199 if (p_dev->device_no == p_dev->func) {
1200 dev_dbg(dev, "requesting configuration\n");
1201 ret = pcmcia_enable_device(p_dev);
1202 if (ret)
1203 goto out;
1204 }
1205
1206 if (p_drv->resume)
1207 ret = p_drv->resume(p_dev);
1208
1209 out:
1210 return ret;
1211}
1212
1213
1214static int pcmcia_bus_suspend_callback(struct device *dev, void *_data)
1215{
1216 struct pcmcia_socket *skt = _data;
1217 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1218
1219 if (p_dev->socket != skt || p_dev->suspended)
1220 return 0;
1221
1222 return runtime_suspend(dev);
1223}
1224
1225static int pcmcia_bus_resume_callback(struct device *dev, void *_data)
1226{
1227 struct pcmcia_socket *skt = _data;
1228 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1229
1230 if (p_dev->socket != skt || !p_dev->suspended)
1231 return 0;
1232
1233 runtime_resume(dev);
1234
1235 return 0;
1236}
1237
1238static int pcmcia_bus_resume(struct pcmcia_socket *skt)
1239{
1240 dev_dbg(&skt->dev, "resuming socket %d\n", skt->sock);
1241 bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback);
1242 return 0;
1243}
1244
1245static int pcmcia_bus_suspend(struct pcmcia_socket *skt)
1246{
1247 dev_dbg(&skt->dev, "suspending socket %d\n", skt->sock);
1248 if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt,
1249 pcmcia_bus_suspend_callback)) {
1250 pcmcia_bus_resume(skt);
1251 return -EIO;
1252 }
1253 return 0;
1254}
1255
1256static int pcmcia_bus_remove(struct pcmcia_socket *skt)
1257{
1258 atomic_set(&skt->present, 0);
1259 pcmcia_card_remove(skt, NULL);
1260
1261 mutex_lock(&skt->ops_mutex);
1262 destroy_cis_cache(skt);
1263 pcmcia_cleanup_irq(skt);
1264 mutex_unlock(&skt->ops_mutex);
1265
1266 return 0;
1267}
1268
1269static int pcmcia_bus_add(struct pcmcia_socket *skt)
1270{
1271 atomic_set(&skt->present, 1);
1272
1273 mutex_lock(&skt->ops_mutex);
1274 skt->pcmcia_pfc = 0;
1275 destroy_cis_cache(skt); /* to be on the safe side... */
1276 mutex_unlock(&skt->ops_mutex);
1277
1278 pcmcia_card_add(skt);
1279
1280 return 0;
1281}
1282
1283static int pcmcia_bus_early_resume(struct pcmcia_socket *skt)
1284{
1285 if (!verify_cis_cache(skt))
1286 return 0;
1287
1288 dev_dbg(&skt->dev, "cis mismatch - different card\n");
1289
1290 /* first, remove the card */
1291 pcmcia_bus_remove(skt);
1292
1293 mutex_lock(&skt->ops_mutex);
1294 destroy_cis_cache(skt);
1295 kfree(skt->fake_cis);
1296 skt->fake_cis = NULL;
1297 skt->functions = 0;
1298 mutex_unlock(&skt->ops_mutex);
1299
1300 /* now, add the new card */
1301 pcmcia_bus_add(skt);
1302 return 0;
1303}
1304
1305
1306/*
1307 * NOTE: This is racy. There's no guarantee the card will still be
1308 * physically present, even if the call to this function returns
1309 * non-NULL. Furthermore, the device driver most likely is unbound
1310 * almost immediately, so the timeframe where pcmcia_dev_present
1311 * returns NULL is probably really really small.
1312 */
1313struct pcmcia_device *pcmcia_dev_present(struct pcmcia_device *_p_dev)
1314{
1315 struct pcmcia_device *p_dev;
1316 struct pcmcia_device *ret = NULL;
1317
1318 p_dev = pcmcia_get_dev(_p_dev);
1319 if (!p_dev)
1320 return NULL;
1321
1322 if (atomic_read(&p_dev->socket->present) != 0)
1323 ret = p_dev;
1324
1325 pcmcia_put_dev(p_dev);
1326 return ret;
1327}
1328EXPORT_SYMBOL(pcmcia_dev_present);
1329
1330
1331static struct pcmcia_callback pcmcia_bus_callback = {
1332 .owner = THIS_MODULE,
1333 .add = pcmcia_bus_add,
1334 .remove = pcmcia_bus_remove,
1335 .requery = pcmcia_requery,
1336 .validate = pccard_validate_cis,
1337 .suspend = pcmcia_bus_suspend,
1338 .early_resume = pcmcia_bus_early_resume,
1339 .resume = pcmcia_bus_resume,
1340};
1341
1342static int pcmcia_bus_add_socket(struct device *dev)
1343{
1344 struct pcmcia_socket *socket = dev_get_drvdata(dev);
1345 int ret;
1346
1347 socket = pcmcia_get_socket(socket);
1348 if (!socket) {
1349 dev_err(dev, "PCMCIA obtaining reference to socket failed\n");
1350 return -ENODEV;
1351 }
1352
1353 ret = sysfs_create_bin_file(&dev->kobj, &pccard_cis_attr);
1354 if (ret) {
1355 dev_err(dev, "PCMCIA registration failed\n");
1356 pcmcia_put_socket(socket);
1357 return ret;
1358 }
1359
1360 INIT_LIST_HEAD(&socket->devices_list);
1361 socket->pcmcia_pfc = 0;
1362 socket->device_count = 0;
1363 atomic_set(&socket->present, 0);
1364
1365 ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback);
1366 if (ret) {
1367 dev_err(dev, "PCMCIA registration failed\n");
1368 pcmcia_put_socket(socket);
1369 return ret;
1370 }
1371
1372 return 0;
1373}
1374
1375static void pcmcia_bus_remove_socket(struct device *dev)
1376{
1377 struct pcmcia_socket *socket = dev_get_drvdata(dev);
1378
1379 if (!socket)
1380 return;
1381
1382 pccard_register_pcmcia(socket, NULL);
1383
1384 /* unregister any unbound devices */
1385 mutex_lock(&socket->skt_mutex);
1386 pcmcia_card_remove(socket, NULL);
1387 release_cis_mem(socket);
1388 mutex_unlock(&socket->skt_mutex);
1389
1390 sysfs_remove_bin_file(&dev->kobj, &pccard_cis_attr);
1391
1392 pcmcia_put_socket(socket);
1393
1394 return;
1395}
1396
1397
1398/* the pcmcia_bus_interface is used to handle pcmcia socket devices */
1399static struct class_interface pcmcia_bus_interface __refdata = {
1400 .class = &pcmcia_socket_class,
1401 .add_dev = &pcmcia_bus_add_socket,
1402 .remove_dev = &pcmcia_bus_remove_socket,
1403};
1404
1405static const struct dev_pm_ops pcmcia_bus_pm_ops = {
1406 SET_SYSTEM_SLEEP_PM_OPS(pcmcia_dev_suspend, pcmcia_dev_resume)
1407};
1408
1409const struct bus_type pcmcia_bus_type = {
1410 .name = "pcmcia",
1411 .uevent = pcmcia_bus_uevent,
1412 .match = pcmcia_bus_match,
1413 .dev_groups = pcmcia_dev_groups,
1414 .probe = pcmcia_device_probe,
1415 .remove = pcmcia_device_remove,
1416 .pm = &pcmcia_bus_pm_ops,
1417};
1418
1419
1420static int __init init_pcmcia_bus(void)
1421{
1422 int ret;
1423
1424 ret = bus_register(&pcmcia_bus_type);
1425 if (ret < 0) {
1426 printk(KERN_WARNING "pcmcia: bus_register error: %d\n", ret);
1427 return ret;
1428 }
1429 ret = class_interface_register(&pcmcia_bus_interface);
1430 if (ret < 0) {
1431 printk(KERN_WARNING
1432 "pcmcia: class_interface_register error: %d\n", ret);
1433 bus_unregister(&pcmcia_bus_type);
1434 return ret;
1435 }
1436
1437 return 0;
1438}
1439fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that
1440 * pcmcia_socket_class is already registered */
1441
1442
1443static void __exit exit_pcmcia_bus(void)
1444{
1445 class_interface_unregister(&pcmcia_bus_interface);
1446
1447 bus_unregister(&pcmcia_bus_type);
1448}
1449module_exit(exit_pcmcia_bus);
1450
1451
1452MODULE_ALIAS("ds");
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
39MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
40MODULE_DESCRIPTION("PCMCIA Driver Services");
41MODULE_LICENSE("GPL");
42
43
44/*====================================================================*/
45
46static 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
83struct 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 */
97static ssize_t
98pcmcia_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}
139static DRIVER_ATTR(new_id, S_IWUSR, NULL, pcmcia_store_new_id);
140
141static void
142pcmcia_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
154static int
155pcmcia_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 */
170int 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}
198EXPORT_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 */
204void 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}
210EXPORT_SYMBOL(pcmcia_unregister_driver);
211
212
213/* pcmcia_device handling */
214
215static 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
224static void pcmcia_put_dev(struct pcmcia_device *p_dev)
225{
226 if (p_dev)
227 put_device(&p_dev->dev);
228}
229
230static 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
237static 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
251static 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
308put_module:
309 if (ret)
310 module_put(p_drv->owner);
311put_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 */
321static 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
353static 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 */
403static 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
486static 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
610static 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
651static 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
663static 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 */
726static 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
778static inline int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
779{
780 return -ENODEV;
781}
782
783#endif
784
785
786static inline int pcmcia_devmatch(struct pcmcia_device *dev,
787 const 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
889static 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 const 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
922static 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
964static 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
973static int pcmcia_dev_suspend(struct device *dev, pm_message_t state);
974static int pcmcia_dev_resume(struct device *dev);
975
976static 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
986static 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) \
999static 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) \
1006static 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
1012pcmcia_device_attr(func, socket, "0x%02x\n");
1013pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
1014pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
1015pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
1016pcmcia_device_stringattr(prod_id1, prod_id[0]);
1017pcmcia_device_stringattr(prod_id2, prod_id[1]);
1018pcmcia_device_stringattr(prod_id3, prod_id[2]);
1019pcmcia_device_stringattr(prod_id4, prod_id[3]);
1020
1021static 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
1034static 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
1044static 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
1062static 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
1084static 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
1100static 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
1118static 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
1164static 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
1201static 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
1212static 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
1225static 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
1232static 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
1243static 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
1256static 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
1270static 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 */
1302struct 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}
1317EXPORT_SYMBOL(pcmcia_dev_present);
1318
1319
1320static 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
1331static 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
1366static 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 */
1391static 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
1398struct 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
1410static 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}
1429fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that
1430 * pcmcia_socket_class is already registered */
1431
1432
1433static void __exit exit_pcmcia_bus(void)
1434{
1435 class_interface_unregister(&pcmcia_bus_interface);
1436
1437 bus_unregister(&pcmcia_bus_type);
1438}
1439module_exit(exit_pcmcia_bus);
1440
1441
1442MODULE_ALIAS("ds");