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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 * pcmcia_store_new_id - 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 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_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_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 = kstrdup(tmp, GFP_KERNEL);
469 if (!new)
470 continue;
471
472 tmp = p_dev->prod_id[i];
473 p_dev->prod_id[i] = new;
474 kfree(tmp);
475 }
476 mutex_unlock(&p_dev->socket->ops_mutex);
477 }
478
479 kfree(vers1);
480 return 0;
481}
482
483
484static struct pcmcia_device *pcmcia_device_add(struct pcmcia_socket *s,
485 unsigned int function)
486{
487 struct pcmcia_device *p_dev, *tmp_dev;
488 int i;
489
490 s = pcmcia_get_socket(s);
491 if (!s)
492 return NULL;
493
494 pr_debug("adding device to %d, function %d\n", s->sock, function);
495
496 p_dev = kzalloc(sizeof(struct pcmcia_device), GFP_KERNEL);
497 if (!p_dev)
498 goto err_put;
499
500 mutex_lock(&s->ops_mutex);
501 p_dev->device_no = (s->device_count++);
502 mutex_unlock(&s->ops_mutex);
503
504 /* max of 2 PFC devices */
505 if ((p_dev->device_no >= 2) && (function == 0))
506 goto err_free;
507
508 /* max of 4 devices overall */
509 if (p_dev->device_no >= 4)
510 goto err_free;
511
512 p_dev->socket = s;
513 p_dev->func = function;
514
515 p_dev->dev.bus = &pcmcia_bus_type;
516 p_dev->dev.parent = s->dev.parent;
517 p_dev->dev.release = pcmcia_release_dev;
518 /* by default don't allow DMA */
519 p_dev->dma_mask = DMA_MASK_NONE;
520 p_dev->dev.dma_mask = &p_dev->dma_mask;
521 dev_set_name(&p_dev->dev, "%d.%d", p_dev->socket->sock, p_dev->device_no);
522 if (!dev_name(&p_dev->dev))
523 goto err_free;
524 p_dev->devname = kasprintf(GFP_KERNEL, "pcmcia%s", dev_name(&p_dev->dev));
525 if (!p_dev->devname)
526 goto err_free;
527 dev_dbg(&p_dev->dev, "devname is %s\n", p_dev->devname);
528
529 mutex_lock(&s->ops_mutex);
530
531 /*
532 * p_dev->function_config must be the same for all card functions.
533 * Note that this is serialized by ops_mutex, so that only one
534 * such struct will be created.
535 */
536 list_for_each_entry(tmp_dev, &s->devices_list, socket_device_list)
537 if (p_dev->func == tmp_dev->func) {
538 p_dev->function_config = tmp_dev->function_config;
539 p_dev->irq = tmp_dev->irq;
540 kref_get(&p_dev->function_config->ref);
541 }
542
543 /* Add to the list in pcmcia_bus_socket */
544 list_add(&p_dev->socket_device_list, &s->devices_list);
545
546 if (pcmcia_setup_irq(p_dev))
547 dev_warn(&p_dev->dev,
548 "IRQ setup failed -- device might not work\n");
549
550 if (!p_dev->function_config) {
551 config_t *c;
552 dev_dbg(&p_dev->dev, "creating config_t\n");
553 c = kzalloc(sizeof(struct config_t), GFP_KERNEL);
554 if (!c) {
555 mutex_unlock(&s->ops_mutex);
556 goto err_unreg;
557 }
558 p_dev->function_config = c;
559 kref_init(&c->ref);
560 for (i = 0; i < MAX_IO_WIN; i++) {
561 c->io[i].name = p_dev->devname;
562 c->io[i].flags = IORESOURCE_IO;
563 }
564 for (i = 0; i < MAX_WIN; i++) {
565 c->mem[i].name = p_dev->devname;
566 c->mem[i].flags = IORESOURCE_MEM;
567 }
568 }
569 for (i = 0; i < MAX_IO_WIN; i++)
570 p_dev->resource[i] = &p_dev->function_config->io[i];
571 for (; i < (MAX_IO_WIN + MAX_WIN); i++)
572 p_dev->resource[i] = &p_dev->function_config->mem[i-MAX_IO_WIN];
573
574 mutex_unlock(&s->ops_mutex);
575
576 dev_notice(&p_dev->dev, "pcmcia: registering new device %s (IRQ: %d)\n",
577 p_dev->devname, p_dev->irq);
578
579 pcmcia_device_query(p_dev);
580
581 if (device_register(&p_dev->dev))
582 goto err_unreg;
583
584 return p_dev;
585
586 err_unreg:
587 mutex_lock(&s->ops_mutex);
588 list_del(&p_dev->socket_device_list);
589 mutex_unlock(&s->ops_mutex);
590
591 err_free:
592 mutex_lock(&s->ops_mutex);
593 s->device_count--;
594 mutex_unlock(&s->ops_mutex);
595
596 for (i = 0; i < 4; i++)
597 kfree(p_dev->prod_id[i]);
598 kfree(p_dev->devname);
599 kfree(p_dev);
600 err_put:
601 pcmcia_put_socket(s);
602
603 return NULL;
604}
605
606
607static int pcmcia_card_add(struct pcmcia_socket *s)
608{
609 cistpl_longlink_mfc_t mfc;
610 unsigned int no_funcs, i, no_chains;
611 int ret = -EAGAIN;
612
613 mutex_lock(&s->ops_mutex);
614 if (!(s->resource_setup_done)) {
615 dev_dbg(&s->dev,
616 "no resources available, delaying card_add\n");
617 mutex_unlock(&s->ops_mutex);
618 return -EAGAIN; /* try again, but later... */
619 }
620
621 if (pcmcia_validate_mem(s)) {
622 dev_dbg(&s->dev, "validating mem resources failed, "
623 "delaying card_add\n");
624 mutex_unlock(&s->ops_mutex);
625 return -EAGAIN; /* try again, but later... */
626 }
627 mutex_unlock(&s->ops_mutex);
628
629 ret = pccard_validate_cis(s, &no_chains);
630 if (ret || !no_chains) {
631#if defined(CONFIG_MTD_PCMCIA_ANONYMOUS)
632 /* Set up as an anonymous card. If we don't have anonymous
633 memory support then just error the card as there is no
634 point trying to second guess.
635
636 Note: some cards have just a device entry, it may be
637 worth extending support to cover these in future */
638 if (ret == -EIO) {
639 dev_info(&s->dev, "no CIS, assuming an anonymous memory card.\n");
640 pcmcia_replace_cis(s, "\xFF", 1);
641 no_chains = 1;
642 ret = 0;
643 } else
644#endif
645 {
646 dev_dbg(&s->dev, "invalid CIS or invalid resources\n");
647 return -ENODEV;
648 }
649 }
650
651 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
652 no_funcs = mfc.nfn;
653 else
654 no_funcs = 1;
655 s->functions = no_funcs;
656
657 for (i = 0; i < no_funcs; i++)
658 pcmcia_device_add(s, i);
659
660 return ret;
661}
662
663
664static int pcmcia_requery_callback(struct device *dev, void *_data)
665{
666 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
667 if (!p_dev->dev.driver) {
668 dev_dbg(dev, "update device information\n");
669 pcmcia_device_query(p_dev);
670 }
671
672 return 0;
673}
674
675
676static void pcmcia_requery(struct pcmcia_socket *s)
677{
678 int has_pfc;
679
680 if (!(s->state & SOCKET_PRESENT))
681 return;
682
683 if (s->functions == 0) {
684 pcmcia_card_add(s);
685 return;
686 }
687
688 /* some device information might have changed because of a CIS
689 * update or because we can finally read it correctly... so
690 * determine it again, overwriting old values if necessary. */
691 bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery_callback);
692
693 /* if the CIS changed, we need to check whether the number of
694 * functions changed. */
695 if (s->fake_cis) {
696 int old_funcs, new_funcs;
697 cistpl_longlink_mfc_t mfc;
698
699 /* does this cis override add or remove functions? */
700 old_funcs = s->functions;
701
702 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC,
703 &mfc))
704 new_funcs = mfc.nfn;
705 else
706 new_funcs = 1;
707 if (old_funcs != new_funcs) {
708 /* we need to re-start */
709 pcmcia_card_remove(s, NULL);
710 s->functions = 0;
711 pcmcia_card_add(s);
712 }
713 }
714
715 /* If the PCMCIA device consists of two pseudo devices,
716 * call pcmcia_device_add() -- which will fail if both
717 * devices are already registered. */
718 mutex_lock(&s->ops_mutex);
719 has_pfc = s->pcmcia_pfc;
720 mutex_unlock(&s->ops_mutex);
721 if (has_pfc)
722 pcmcia_device_add(s, 0);
723
724 /* we re-scan all devices, not just the ones connected to this
725 * socket. This does not matter, though. */
726 if (bus_rescan_devices(&pcmcia_bus_type))
727 dev_warn(&s->dev, "rescanning the bus failed\n");
728}
729
730
731#ifdef CONFIG_PCMCIA_LOAD_CIS
732
733/**
734 * pcmcia_load_firmware - load CIS from userspace if device-provided is broken
735 * @dev: the pcmcia device which needs a CIS override
736 * @filename: requested filename in /lib/firmware/
737 *
738 * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if
739 * the one provided by the card is broken. The firmware files reside in
740 * /lib/firmware/ in userspace.
741 */
742static int pcmcia_load_firmware(struct pcmcia_device *dev, char *filename)
743{
744 struct pcmcia_socket *s = dev->socket;
745 const struct firmware *fw;
746 int ret = -ENOMEM;
747 cistpl_longlink_mfc_t mfc;
748 int old_funcs, new_funcs = 1;
749
750 if (!filename)
751 return -EINVAL;
752
753 dev_dbg(&dev->dev, "trying to load CIS file %s\n", filename);
754
755 if (request_firmware(&fw, filename, &dev->dev) == 0) {
756 if (fw->size >= CISTPL_MAX_CIS_SIZE) {
757 ret = -EINVAL;
758 dev_err(&dev->dev, "pcmcia: CIS override is too big\n");
759 goto release;
760 }
761
762 if (!pcmcia_replace_cis(s, fw->data, fw->size))
763 ret = 0;
764 else {
765 dev_err(&dev->dev, "pcmcia: CIS override failed\n");
766 goto release;
767 }
768
769 /* we need to re-start if the number of functions changed */
770 old_funcs = s->functions;
771 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC,
772 &mfc))
773 new_funcs = mfc.nfn;
774
775 if (old_funcs != new_funcs)
776 ret = -EBUSY;
777
778 /* update information */
779 pcmcia_device_query(dev);
780
781 /* requery (as number of functions might have changed) */
782 pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY);
783 }
784 release:
785 release_firmware(fw);
786
787 return ret;
788}
789
790#else /* !CONFIG_PCMCIA_LOAD_CIS */
791
792static inline int pcmcia_load_firmware(struct pcmcia_device *dev,
793 char *filename)
794{
795 return -ENODEV;
796}
797
798#endif
799
800
801static inline int pcmcia_devmatch(struct pcmcia_device *dev,
802 const struct pcmcia_device_id *did)
803{
804 if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
805 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
806 return 0;
807 }
808
809 if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
810 if ((!dev->has_card_id) || (dev->card_id != did->card_id))
811 return 0;
812 }
813
814 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
815 if (dev->func != did->function)
816 return 0;
817 }
818
819 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
820 if (!dev->prod_id[0])
821 return 0;
822 if (strcmp(did->prod_id[0], dev->prod_id[0]))
823 return 0;
824 }
825
826 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
827 if (!dev->prod_id[1])
828 return 0;
829 if (strcmp(did->prod_id[1], dev->prod_id[1]))
830 return 0;
831 }
832
833 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
834 if (!dev->prod_id[2])
835 return 0;
836 if (strcmp(did->prod_id[2], dev->prod_id[2]))
837 return 0;
838 }
839
840 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
841 if (!dev->prod_id[3])
842 return 0;
843 if (strcmp(did->prod_id[3], dev->prod_id[3]))
844 return 0;
845 }
846
847 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
848 dev_dbg(&dev->dev, "this is a pseudo-multi-function device\n");
849 mutex_lock(&dev->socket->ops_mutex);
850 dev->socket->pcmcia_pfc = 1;
851 mutex_unlock(&dev->socket->ops_mutex);
852 if (dev->device_no != did->device_no)
853 return 0;
854 }
855
856 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
857 int ret;
858
859 if ((!dev->has_func_id) || (dev->func_id != did->func_id))
860 return 0;
861
862 /* if this is a pseudo-multi-function device,
863 * we need explicit matches */
864 if (dev->socket->pcmcia_pfc)
865 return 0;
866 if (dev->device_no)
867 return 0;
868
869 /* also, FUNC_ID matching needs to be activated by userspace
870 * after it has re-checked that there is no possible module
871 * with a prod_id/manf_id/card_id match.
872 */
873 mutex_lock(&dev->socket->ops_mutex);
874 ret = dev->allow_func_id_match;
875 mutex_unlock(&dev->socket->ops_mutex);
876
877 if (!ret) {
878 dev_dbg(&dev->dev,
879 "skipping FUNC_ID match until userspace ACK\n");
880 return 0;
881 }
882 }
883
884 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
885 dev_dbg(&dev->dev, "device needs a fake CIS\n");
886 if (!dev->socket->fake_cis)
887 if (pcmcia_load_firmware(dev, did->cisfile))
888 return 0;
889 }
890
891 if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
892 int i;
893 for (i = 0; i < 4; i++)
894 if (dev->prod_id[i])
895 return 0;
896 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
897 return 0;
898 }
899
900 return 1;
901}
902
903
904static int pcmcia_bus_match(struct device *dev, struct device_driver *drv)
905{
906 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
907 struct pcmcia_driver *p_drv = to_pcmcia_drv(drv);
908 const struct pcmcia_device_id *did = p_drv->id_table;
909 struct pcmcia_dynid *dynid;
910
911 /* match dynamic devices first */
912 mutex_lock(&p_drv->dynids.lock);
913 list_for_each_entry(dynid, &p_drv->dynids.list, node) {
914 dev_dbg(dev, "trying to match to %s\n", drv->name);
915 if (pcmcia_devmatch(p_dev, &dynid->id)) {
916 dev_dbg(dev, "matched to %s\n", drv->name);
917 mutex_unlock(&p_drv->dynids.lock);
918 return 1;
919 }
920 }
921 mutex_unlock(&p_drv->dynids.lock);
922
923 while (did && did->match_flags) {
924 dev_dbg(dev, "trying to match to %s\n", drv->name);
925 if (pcmcia_devmatch(p_dev, did)) {
926 dev_dbg(dev, "matched to %s\n", drv->name);
927 return 1;
928 }
929 did++;
930 }
931
932 return 0;
933}
934
935static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
936{
937 struct pcmcia_device *p_dev;
938 int i;
939 u32 hash[4] = { 0, 0, 0, 0};
940
941 if (!dev)
942 return -ENODEV;
943
944 p_dev = to_pcmcia_dev(dev);
945
946 /* calculate hashes */
947 for (i = 0; i < 4; i++) {
948 if (!p_dev->prod_id[i])
949 continue;
950 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
951 }
952
953 if (add_uevent_var(env, "SOCKET_NO=%u", p_dev->socket->sock))
954 return -ENOMEM;
955
956 if (add_uevent_var(env, "DEVICE_NO=%02X", p_dev->device_no))
957 return -ENOMEM;
958
959 if (add_uevent_var(env, "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
960 "pa%08Xpb%08Xpc%08Xpd%08X",
961 p_dev->has_manf_id ? p_dev->manf_id : 0,
962 p_dev->has_card_id ? p_dev->card_id : 0,
963 p_dev->has_func_id ? p_dev->func_id : 0,
964 p_dev->func,
965 p_dev->device_no,
966 hash[0],
967 hash[1],
968 hash[2],
969 hash[3]))
970 return -ENOMEM;
971
972 return 0;
973}
974
975/************************ runtime PM support ***************************/
976
977static int pcmcia_dev_suspend(struct device *dev);
978static int pcmcia_dev_resume(struct device *dev);
979
980static int runtime_suspend(struct device *dev)
981{
982 int rc;
983
984 device_lock(dev);
985 rc = pcmcia_dev_suspend(dev);
986 device_unlock(dev);
987 return rc;
988}
989
990static int runtime_resume(struct device *dev)
991{
992 int rc;
993
994 device_lock(dev);
995 rc = pcmcia_dev_resume(dev);
996 device_unlock(dev);
997 return rc;
998}
999
1000/************************ per-device sysfs output ***************************/
1001
1002#define pcmcia_device_attr(field, test, format) \
1003static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf) \
1004{ \
1005 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
1006 return p_dev->test ? sprintf(buf, format, p_dev->field) : -ENODEV; \
1007} \
1008static DEVICE_ATTR_RO(field);
1009
1010#define pcmcia_device_stringattr(name, field) \
1011static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf) \
1012{ \
1013 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
1014 return p_dev->field ? sprintf(buf, "%s\n", p_dev->field) : -ENODEV; \
1015} \
1016static DEVICE_ATTR_RO(name);
1017
1018pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
1019pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
1020pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
1021pcmcia_device_stringattr(prod_id1, prod_id[0]);
1022pcmcia_device_stringattr(prod_id2, prod_id[1]);
1023pcmcia_device_stringattr(prod_id3, prod_id[2]);
1024pcmcia_device_stringattr(prod_id4, prod_id[3]);
1025
1026static ssize_t function_show(struct device *dev, struct device_attribute *attr,
1027 char *buf)
1028{
1029 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1030 return p_dev->socket ? sprintf(buf, "0x%02x\n", p_dev->func) : -ENODEV;
1031}
1032static DEVICE_ATTR_RO(function);
1033
1034static ssize_t resources_show(struct device *dev,
1035 struct device_attribute *attr, char *buf)
1036{
1037 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1038 char *str = buf;
1039 int i;
1040
1041 for (i = 0; i < PCMCIA_NUM_RESOURCES; i++)
1042 str += sprintf(str, "%pr\n", p_dev->resource[i]);
1043
1044 return str - buf;
1045}
1046static DEVICE_ATTR_RO(resources);
1047
1048static ssize_t pm_state_show(struct device *dev, struct device_attribute *attr, char *buf)
1049{
1050 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1051
1052 if (p_dev->suspended)
1053 return sprintf(buf, "off\n");
1054 else
1055 return sprintf(buf, "on\n");
1056}
1057
1058static ssize_t pm_state_store(struct device *dev, struct device_attribute *attr,
1059 const char *buf, size_t count)
1060{
1061 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1062 int ret = 0;
1063
1064 if (!count)
1065 return -EINVAL;
1066
1067 if ((!p_dev->suspended) && !strncmp(buf, "off", 3))
1068 ret = runtime_suspend(dev);
1069 else if (p_dev->suspended && !strncmp(buf, "on", 2))
1070 ret = runtime_resume(dev);
1071
1072 return ret ? ret : count;
1073}
1074static DEVICE_ATTR_RW(pm_state);
1075
1076static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1077{
1078 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1079 int i;
1080 u32 hash[4] = { 0, 0, 0, 0};
1081
1082 /* calculate hashes */
1083 for (i = 0; i < 4; i++) {
1084 if (!p_dev->prod_id[i])
1085 continue;
1086 hash[i] = crc32(0, p_dev->prod_id[i],
1087 strlen(p_dev->prod_id[i]));
1088 }
1089 return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
1090 "pa%08Xpb%08Xpc%08Xpd%08X\n",
1091 p_dev->has_manf_id ? p_dev->manf_id : 0,
1092 p_dev->has_card_id ? p_dev->card_id : 0,
1093 p_dev->has_func_id ? p_dev->func_id : 0,
1094 p_dev->func, p_dev->device_no,
1095 hash[0], hash[1], hash[2], hash[3]);
1096}
1097static DEVICE_ATTR_RO(modalias);
1098
1099static ssize_t allow_func_id_match_store(struct device *dev,
1100 struct device_attribute *attr, const char *buf, size_t count)
1101{
1102 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1103
1104 if (!count)
1105 return -EINVAL;
1106
1107 mutex_lock(&p_dev->socket->ops_mutex);
1108 p_dev->allow_func_id_match = 1;
1109 mutex_unlock(&p_dev->socket->ops_mutex);
1110 pcmcia_parse_uevents(p_dev->socket, PCMCIA_UEVENT_REQUERY);
1111
1112 return count;
1113}
1114static DEVICE_ATTR_WO(allow_func_id_match);
1115
1116static struct attribute *pcmcia_dev_attrs[] = {
1117 &dev_attr_resources.attr,
1118 &dev_attr_pm_state.attr,
1119 &dev_attr_function.attr,
1120 &dev_attr_func_id.attr,
1121 &dev_attr_manf_id.attr,
1122 &dev_attr_card_id.attr,
1123 &dev_attr_prod_id1.attr,
1124 &dev_attr_prod_id2.attr,
1125 &dev_attr_prod_id3.attr,
1126 &dev_attr_prod_id4.attr,
1127 &dev_attr_modalias.attr,
1128 &dev_attr_allow_func_id_match.attr,
1129 NULL,
1130};
1131ATTRIBUTE_GROUPS(pcmcia_dev);
1132
1133/* PM support, also needed for reset */
1134
1135static int pcmcia_dev_suspend(struct device *dev)
1136{
1137 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1138 struct pcmcia_driver *p_drv = NULL;
1139 int ret = 0;
1140
1141 mutex_lock(&p_dev->socket->ops_mutex);
1142 if (p_dev->suspended) {
1143 mutex_unlock(&p_dev->socket->ops_mutex);
1144 return 0;
1145 }
1146 p_dev->suspended = 1;
1147 mutex_unlock(&p_dev->socket->ops_mutex);
1148
1149 dev_dbg(dev, "suspending\n");
1150
1151 if (dev->driver)
1152 p_drv = to_pcmcia_drv(dev->driver);
1153
1154 if (!p_drv)
1155 goto out;
1156
1157 if (p_drv->suspend) {
1158 ret = p_drv->suspend(p_dev);
1159 if (ret) {
1160 dev_err(dev,
1161 "pcmcia: device %s (driver %s) did not want to go to sleep (%d)\n",
1162 p_dev->devname, p_drv->name, ret);
1163 mutex_lock(&p_dev->socket->ops_mutex);
1164 p_dev->suspended = 0;
1165 mutex_unlock(&p_dev->socket->ops_mutex);
1166 goto out;
1167 }
1168 }
1169
1170 if (p_dev->device_no == p_dev->func) {
1171 dev_dbg(dev, "releasing configuration\n");
1172 pcmcia_release_configuration(p_dev);
1173 }
1174
1175 out:
1176 return ret;
1177}
1178
1179
1180static int pcmcia_dev_resume(struct device *dev)
1181{
1182 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1183 struct pcmcia_driver *p_drv = NULL;
1184 int ret = 0;
1185
1186 mutex_lock(&p_dev->socket->ops_mutex);
1187 if (!p_dev->suspended) {
1188 mutex_unlock(&p_dev->socket->ops_mutex);
1189 return 0;
1190 }
1191 p_dev->suspended = 0;
1192 mutex_unlock(&p_dev->socket->ops_mutex);
1193
1194 dev_dbg(dev, "resuming\n");
1195
1196 if (dev->driver)
1197 p_drv = to_pcmcia_drv(dev->driver);
1198
1199 if (!p_drv)
1200 goto out;
1201
1202 if (p_dev->device_no == p_dev->func) {
1203 dev_dbg(dev, "requesting configuration\n");
1204 ret = pcmcia_enable_device(p_dev);
1205 if (ret)
1206 goto out;
1207 }
1208
1209 if (p_drv->resume)
1210 ret = p_drv->resume(p_dev);
1211
1212 out:
1213 return ret;
1214}
1215
1216
1217static int pcmcia_bus_suspend_callback(struct device *dev, void *_data)
1218{
1219 struct pcmcia_socket *skt = _data;
1220 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1221
1222 if (p_dev->socket != skt || p_dev->suspended)
1223 return 0;
1224
1225 return runtime_suspend(dev);
1226}
1227
1228static int pcmcia_bus_resume_callback(struct device *dev, void *_data)
1229{
1230 struct pcmcia_socket *skt = _data;
1231 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1232
1233 if (p_dev->socket != skt || !p_dev->suspended)
1234 return 0;
1235
1236 runtime_resume(dev);
1237
1238 return 0;
1239}
1240
1241static int pcmcia_bus_resume(struct pcmcia_socket *skt)
1242{
1243 dev_dbg(&skt->dev, "resuming socket %d\n", skt->sock);
1244 bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback);
1245 return 0;
1246}
1247
1248static int pcmcia_bus_suspend(struct pcmcia_socket *skt)
1249{
1250 dev_dbg(&skt->dev, "suspending socket %d\n", skt->sock);
1251 if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt,
1252 pcmcia_bus_suspend_callback)) {
1253 pcmcia_bus_resume(skt);
1254 return -EIO;
1255 }
1256 return 0;
1257}
1258
1259static int pcmcia_bus_remove(struct pcmcia_socket *skt)
1260{
1261 atomic_set(&skt->present, 0);
1262 pcmcia_card_remove(skt, NULL);
1263
1264 mutex_lock(&skt->ops_mutex);
1265 destroy_cis_cache(skt);
1266 pcmcia_cleanup_irq(skt);
1267 mutex_unlock(&skt->ops_mutex);
1268
1269 return 0;
1270}
1271
1272static int pcmcia_bus_add(struct pcmcia_socket *skt)
1273{
1274 atomic_set(&skt->present, 1);
1275
1276 mutex_lock(&skt->ops_mutex);
1277 skt->pcmcia_pfc = 0;
1278 destroy_cis_cache(skt); /* to be on the safe side... */
1279 mutex_unlock(&skt->ops_mutex);
1280
1281 pcmcia_card_add(skt);
1282
1283 return 0;
1284}
1285
1286static int pcmcia_bus_early_resume(struct pcmcia_socket *skt)
1287{
1288 if (!verify_cis_cache(skt))
1289 return 0;
1290
1291 dev_dbg(&skt->dev, "cis mismatch - different card\n");
1292
1293 /* first, remove the card */
1294 pcmcia_bus_remove(skt);
1295
1296 mutex_lock(&skt->ops_mutex);
1297 destroy_cis_cache(skt);
1298 kfree(skt->fake_cis);
1299 skt->fake_cis = NULL;
1300 skt->functions = 0;
1301 mutex_unlock(&skt->ops_mutex);
1302
1303 /* now, add the new card */
1304 pcmcia_bus_add(skt);
1305 return 0;
1306}
1307
1308
1309/*
1310 * NOTE: This is racy. There's no guarantee the card will still be
1311 * physically present, even if the call to this function returns
1312 * non-NULL. Furthermore, the device driver most likely is unbound
1313 * almost immediately, so the timeframe where pcmcia_dev_present
1314 * returns NULL is probably really really small.
1315 */
1316struct pcmcia_device *pcmcia_dev_present(struct pcmcia_device *_p_dev)
1317{
1318 struct pcmcia_device *p_dev;
1319 struct pcmcia_device *ret = NULL;
1320
1321 p_dev = pcmcia_get_dev(_p_dev);
1322 if (!p_dev)
1323 return NULL;
1324
1325 if (atomic_read(&p_dev->socket->present) != 0)
1326 ret = p_dev;
1327
1328 pcmcia_put_dev(p_dev);
1329 return ret;
1330}
1331EXPORT_SYMBOL(pcmcia_dev_present);
1332
1333
1334static struct pcmcia_callback pcmcia_bus_callback = {
1335 .owner = THIS_MODULE,
1336 .add = pcmcia_bus_add,
1337 .remove = pcmcia_bus_remove,
1338 .requery = pcmcia_requery,
1339 .validate = pccard_validate_cis,
1340 .suspend = pcmcia_bus_suspend,
1341 .early_resume = pcmcia_bus_early_resume,
1342 .resume = pcmcia_bus_resume,
1343};
1344
1345static int pcmcia_bus_add_socket(struct device *dev,
1346 struct class_interface *class_intf)
1347{
1348 struct pcmcia_socket *socket = dev_get_drvdata(dev);
1349 int ret;
1350
1351 socket = pcmcia_get_socket(socket);
1352 if (!socket) {
1353 dev_err(dev, "PCMCIA obtaining reference to socket failed\n");
1354 return -ENODEV;
1355 }
1356
1357 ret = sysfs_create_bin_file(&dev->kobj, &pccard_cis_attr);
1358 if (ret) {
1359 dev_err(dev, "PCMCIA registration failed\n");
1360 pcmcia_put_socket(socket);
1361 return ret;
1362 }
1363
1364 INIT_LIST_HEAD(&socket->devices_list);
1365 socket->pcmcia_pfc = 0;
1366 socket->device_count = 0;
1367 atomic_set(&socket->present, 0);
1368
1369 ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback);
1370 if (ret) {
1371 dev_err(dev, "PCMCIA registration failed\n");
1372 pcmcia_put_socket(socket);
1373 return ret;
1374 }
1375
1376 return 0;
1377}
1378
1379static void pcmcia_bus_remove_socket(struct device *dev,
1380 struct class_interface *class_intf)
1381{
1382 struct pcmcia_socket *socket = dev_get_drvdata(dev);
1383
1384 if (!socket)
1385 return;
1386
1387 pccard_register_pcmcia(socket, NULL);
1388
1389 /* unregister any unbound devices */
1390 mutex_lock(&socket->skt_mutex);
1391 pcmcia_card_remove(socket, NULL);
1392 release_cis_mem(socket);
1393 mutex_unlock(&socket->skt_mutex);
1394
1395 sysfs_remove_bin_file(&dev->kobj, &pccard_cis_attr);
1396
1397 pcmcia_put_socket(socket);
1398
1399 return;
1400}
1401
1402
1403/* the pcmcia_bus_interface is used to handle pcmcia socket devices */
1404static struct class_interface pcmcia_bus_interface __refdata = {
1405 .class = &pcmcia_socket_class,
1406 .add_dev = &pcmcia_bus_add_socket,
1407 .remove_dev = &pcmcia_bus_remove_socket,
1408};
1409
1410static const struct dev_pm_ops pcmcia_bus_pm_ops = {
1411 SET_SYSTEM_SLEEP_PM_OPS(pcmcia_dev_suspend, pcmcia_dev_resume)
1412};
1413
1414struct bus_type pcmcia_bus_type = {
1415 .name = "pcmcia",
1416 .uevent = pcmcia_bus_uevent,
1417 .match = pcmcia_bus_match,
1418 .dev_groups = pcmcia_dev_groups,
1419 .probe = pcmcia_device_probe,
1420 .remove = pcmcia_device_remove,
1421 .pm = &pcmcia_bus_pm_ops,
1422};
1423
1424
1425static int __init init_pcmcia_bus(void)
1426{
1427 int ret;
1428
1429 ret = bus_register(&pcmcia_bus_type);
1430 if (ret < 0) {
1431 printk(KERN_WARNING "pcmcia: bus_register error: %d\n", ret);
1432 return ret;
1433 }
1434 ret = class_interface_register(&pcmcia_bus_interface);
1435 if (ret < 0) {
1436 printk(KERN_WARNING
1437 "pcmcia: class_interface_register error: %d\n", ret);
1438 bus_unregister(&pcmcia_bus_type);
1439 return ret;
1440 }
1441
1442 return 0;
1443}
1444fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that
1445 * pcmcia_socket_class is already registered */
1446
1447
1448static void __exit exit_pcmcia_bus(void)
1449{
1450 class_interface_unregister(&pcmcia_bus_interface);
1451
1452 bus_unregister(&pcmcia_bus_type);
1453}
1454module_exit(exit_pcmcia_bus);
1455
1456
1457MODULE_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 retval = driver_attach(&pdrv->drv);
131
132 if (retval)
133 return retval;
134 return count;
135}
136static DRIVER_ATTR(new_id, S_IWUSR, NULL, pcmcia_store_new_id);
137
138static void
139pcmcia_free_dynids(struct pcmcia_driver *drv)
140{
141 struct pcmcia_dynid *dynid, *n;
142
143 mutex_lock(&drv->dynids.lock);
144 list_for_each_entry_safe(dynid, n, &drv->dynids.list, node) {
145 list_del(&dynid->node);
146 kfree(dynid);
147 }
148 mutex_unlock(&drv->dynids.lock);
149}
150
151static int
152pcmcia_create_newid_file(struct pcmcia_driver *drv)
153{
154 int error = 0;
155 if (drv->probe != NULL)
156 error = driver_create_file(&drv->drv, &driver_attr_new_id);
157 return error;
158}
159
160static void
161pcmcia_remove_newid_file(struct pcmcia_driver *drv)
162{
163 driver_remove_file(&drv->drv, &driver_attr_new_id);
164}
165
166/**
167 * pcmcia_register_driver - register a PCMCIA driver with the bus core
168 * @driver: the &driver being registered
169 *
170 * Registers a PCMCIA driver with the PCMCIA bus core.
171 */
172int pcmcia_register_driver(struct pcmcia_driver *driver)
173{
174 int error;
175
176 if (!driver)
177 return -EINVAL;
178
179 pcmcia_check_driver(driver);
180
181 /* initialize common fields */
182 driver->drv.bus = &pcmcia_bus_type;
183 driver->drv.owner = driver->owner;
184 driver->drv.name = driver->name;
185 mutex_init(&driver->dynids.lock);
186 INIT_LIST_HEAD(&driver->dynids.list);
187
188 pr_debug("registering driver %s\n", driver->name);
189
190 error = driver_register(&driver->drv);
191 if (error < 0)
192 return error;
193
194 error = pcmcia_create_newid_file(driver);
195 if (error)
196 driver_unregister(&driver->drv);
197
198 return error;
199}
200EXPORT_SYMBOL(pcmcia_register_driver);
201
202/**
203 * pcmcia_unregister_driver - unregister a PCMCIA driver with the bus core
204 * @driver: the &driver being unregistered
205 */
206void pcmcia_unregister_driver(struct pcmcia_driver *driver)
207{
208 pr_debug("unregistering driver %s\n", driver->name);
209 pcmcia_remove_newid_file(driver);
210 driver_unregister(&driver->drv);
211 pcmcia_free_dynids(driver);
212}
213EXPORT_SYMBOL(pcmcia_unregister_driver);
214
215
216/* pcmcia_device handling */
217
218static struct pcmcia_device *pcmcia_get_dev(struct pcmcia_device *p_dev)
219{
220 struct device *tmp_dev;
221 tmp_dev = get_device(&p_dev->dev);
222 if (!tmp_dev)
223 return NULL;
224 return to_pcmcia_dev(tmp_dev);
225}
226
227static void pcmcia_put_dev(struct pcmcia_device *p_dev)
228{
229 if (p_dev)
230 put_device(&p_dev->dev);
231}
232
233static void pcmcia_release_function(struct kref *ref)
234{
235 struct config_t *c = container_of(ref, struct config_t, ref);
236 pr_debug("releasing config_t\n");
237 kfree(c);
238}
239
240static void pcmcia_release_dev(struct device *dev)
241{
242 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
243 int i;
244 dev_dbg(dev, "releasing device\n");
245 pcmcia_put_socket(p_dev->socket);
246 for (i = 0; i < 4; i++)
247 kfree(p_dev->prod_id[i]);
248 kfree(p_dev->devname);
249 kref_put(&p_dev->function_config->ref, pcmcia_release_function);
250 kfree(p_dev);
251}
252
253
254static int pcmcia_device_probe(struct device *dev)
255{
256 struct pcmcia_device *p_dev;
257 struct pcmcia_driver *p_drv;
258 struct pcmcia_socket *s;
259 cistpl_config_t cis_config;
260 int ret = 0;
261
262 dev = get_device(dev);
263 if (!dev)
264 return -ENODEV;
265
266 p_dev = to_pcmcia_dev(dev);
267 p_drv = to_pcmcia_drv(dev->driver);
268 s = p_dev->socket;
269
270 dev_dbg(dev, "trying to bind to %s\n", p_drv->name);
271
272 if ((!p_drv->probe) || (!p_dev->function_config) ||
273 (!try_module_get(p_drv->owner))) {
274 ret = -EINVAL;
275 goto put_dev;
276 }
277
278 /* set up some more device information */
279 ret = pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_CONFIG,
280 &cis_config);
281 if (!ret) {
282 p_dev->config_base = cis_config.base;
283 p_dev->config_regs = cis_config.rmask[0];
284 dev_dbg(dev, "base %x, regs %x", p_dev->config_base,
285 p_dev->config_regs);
286 } else {
287 dev_info(dev,
288 "pcmcia: could not parse base and rmask0 of CIS\n");
289 p_dev->config_base = 0;
290 p_dev->config_regs = 0;
291 }
292
293 ret = p_drv->probe(p_dev);
294 if (ret) {
295 dev_dbg(dev, "binding to %s failed with %d\n",
296 p_drv->name, ret);
297 goto put_module;
298 }
299 dev_dbg(dev, "%s bound: Vpp %d.%d, idx %x, IRQ %d", p_drv->name,
300 p_dev->vpp/10, p_dev->vpp%10, p_dev->config_index, p_dev->irq);
301 dev_dbg(dev, "resources: ioport %pR %pR iomem %pR %pR %pR",
302 p_dev->resource[0], p_dev->resource[1], p_dev->resource[2],
303 p_dev->resource[3], p_dev->resource[4]);
304
305 mutex_lock(&s->ops_mutex);
306 if ((s->pcmcia_pfc) &&
307 (p_dev->socket->device_count == 1) && (p_dev->device_no == 0))
308 pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY);
309 mutex_unlock(&s->ops_mutex);
310
311put_module:
312 if (ret)
313 module_put(p_drv->owner);
314put_dev:
315 if (ret)
316 put_device(dev);
317 return ret;
318}
319
320
321/*
322 * Removes a PCMCIA card from the device tree and socket list.
323 */
324static void pcmcia_card_remove(struct pcmcia_socket *s, struct pcmcia_device *leftover)
325{
326 struct pcmcia_device *p_dev;
327 struct pcmcia_device *tmp;
328
329 dev_dbg(leftover ? &leftover->dev : &s->dev,
330 "pcmcia_card_remove(%d) %s\n", s->sock,
331 leftover ? leftover->devname : "");
332
333 mutex_lock(&s->ops_mutex);
334 if (!leftover)
335 s->device_count = 0;
336 else
337 s->device_count = 1;
338 mutex_unlock(&s->ops_mutex);
339
340 /* unregister all pcmcia_devices registered with this socket, except leftover */
341 list_for_each_entry_safe(p_dev, tmp, &s->devices_list, socket_device_list) {
342 if (p_dev == leftover)
343 continue;
344
345 mutex_lock(&s->ops_mutex);
346 list_del(&p_dev->socket_device_list);
347 mutex_unlock(&s->ops_mutex);
348
349 dev_dbg(&p_dev->dev, "unregistering device\n");
350 device_unregister(&p_dev->dev);
351 }
352
353 return;
354}
355
356static int pcmcia_device_remove(struct device *dev)
357{
358 struct pcmcia_device *p_dev;
359 struct pcmcia_driver *p_drv;
360 int i;
361
362 p_dev = to_pcmcia_dev(dev);
363 p_drv = to_pcmcia_drv(dev->driver);
364
365 dev_dbg(dev, "removing device\n");
366
367 /* If we're removing the primary module driving a
368 * pseudo multi-function card, we need to unbind
369 * all devices
370 */
371 if ((p_dev->socket->pcmcia_pfc) &&
372 (p_dev->socket->device_count > 0) &&
373 (p_dev->device_no == 0))
374 pcmcia_card_remove(p_dev->socket, p_dev);
375
376 /* detach the "instance" */
377 if (!p_drv)
378 return 0;
379
380 if (p_drv->remove)
381 p_drv->remove(p_dev);
382
383 /* check for proper unloading */
384 if (p_dev->_irq || p_dev->_io || p_dev->_locked)
385 dev_info(dev,
386 "pcmcia: driver %s did not release config properly\n",
387 p_drv->name);
388
389 for (i = 0; i < MAX_WIN; i++)
390 if (p_dev->_win & CLIENT_WIN_REQ(i))
391 dev_info(dev,
392 "pcmcia: driver %s did not release window properly\n",
393 p_drv->name);
394
395 /* references from pcmcia_probe_device */
396 pcmcia_put_dev(p_dev);
397 module_put(p_drv->owner);
398
399 return 0;
400}
401
402
403/*
404 * pcmcia_device_query -- determine information about a pcmcia device
405 */
406static int pcmcia_device_query(struct pcmcia_device *p_dev)
407{
408 cistpl_manfid_t manf_id;
409 cistpl_funcid_t func_id;
410 cistpl_vers_1_t *vers1;
411 unsigned int i;
412
413 vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL);
414 if (!vers1)
415 return -ENOMEM;
416
417 if (!pccard_read_tuple(p_dev->socket, BIND_FN_ALL,
418 CISTPL_MANFID, &manf_id)) {
419 mutex_lock(&p_dev->socket->ops_mutex);
420 p_dev->manf_id = manf_id.manf;
421 p_dev->card_id = manf_id.card;
422 p_dev->has_manf_id = 1;
423 p_dev->has_card_id = 1;
424 mutex_unlock(&p_dev->socket->ops_mutex);
425 }
426
427 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
428 CISTPL_FUNCID, &func_id)) {
429 mutex_lock(&p_dev->socket->ops_mutex);
430 p_dev->func_id = func_id.func;
431 p_dev->has_func_id = 1;
432 mutex_unlock(&p_dev->socket->ops_mutex);
433 } else {
434 /* rule of thumb: cards with no FUNCID, but with
435 * common memory device geometry information, are
436 * probably memory cards (from pcmcia-cs) */
437 cistpl_device_geo_t *devgeo;
438
439 devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL);
440 if (!devgeo) {
441 kfree(vers1);
442 return -ENOMEM;
443 }
444 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
445 CISTPL_DEVICE_GEO, devgeo)) {
446 dev_dbg(&p_dev->dev,
447 "mem device geometry probably means "
448 "FUNCID_MEMORY\n");
449 mutex_lock(&p_dev->socket->ops_mutex);
450 p_dev->func_id = CISTPL_FUNCID_MEMORY;
451 p_dev->has_func_id = 1;
452 mutex_unlock(&p_dev->socket->ops_mutex);
453 }
454 kfree(devgeo);
455 }
456
457 if (!pccard_read_tuple(p_dev->socket, BIND_FN_ALL, CISTPL_VERS_1,
458 vers1)) {
459 mutex_lock(&p_dev->socket->ops_mutex);
460 for (i = 0; i < min_t(unsigned int, 4, vers1->ns); i++) {
461 char *tmp;
462 unsigned int length;
463 char *new;
464
465 tmp = vers1->str + vers1->ofs[i];
466
467 length = strlen(tmp) + 1;
468 if ((length < 2) || (length > 255))
469 continue;
470
471 new = kstrdup(tmp, GFP_KERNEL);
472 if (!new)
473 continue;
474
475 tmp = p_dev->prod_id[i];
476 p_dev->prod_id[i] = new;
477 kfree(tmp);
478 }
479 mutex_unlock(&p_dev->socket->ops_mutex);
480 }
481
482 kfree(vers1);
483 return 0;
484}
485
486
487static struct pcmcia_device *pcmcia_device_add(struct pcmcia_socket *s,
488 unsigned int function)
489{
490 struct pcmcia_device *p_dev, *tmp_dev;
491 int i;
492
493 s = pcmcia_get_socket(s);
494 if (!s)
495 return NULL;
496
497 pr_debug("adding device to %d, function %d\n", s->sock, function);
498
499 p_dev = kzalloc(sizeof(struct pcmcia_device), GFP_KERNEL);
500 if (!p_dev)
501 goto err_put;
502
503 mutex_lock(&s->ops_mutex);
504 p_dev->device_no = (s->device_count++);
505 mutex_unlock(&s->ops_mutex);
506
507 /* max of 2 PFC devices */
508 if ((p_dev->device_no >= 2) && (function == 0))
509 goto err_free;
510
511 /* max of 4 devices overall */
512 if (p_dev->device_no >= 4)
513 goto err_free;
514
515 p_dev->socket = s;
516 p_dev->func = function;
517
518 p_dev->dev.bus = &pcmcia_bus_type;
519 p_dev->dev.parent = s->dev.parent;
520 p_dev->dev.release = pcmcia_release_dev;
521 /* by default don't allow DMA */
522 p_dev->dma_mask = DMA_MASK_NONE;
523 p_dev->dev.dma_mask = &p_dev->dma_mask;
524 dev_set_name(&p_dev->dev, "%d.%d", p_dev->socket->sock, p_dev->device_no);
525 if (!dev_name(&p_dev->dev))
526 goto err_free;
527 p_dev->devname = kasprintf(GFP_KERNEL, "pcmcia%s", dev_name(&p_dev->dev));
528 if (!p_dev->devname)
529 goto err_free;
530 dev_dbg(&p_dev->dev, "devname is %s\n", p_dev->devname);
531
532 mutex_lock(&s->ops_mutex);
533
534 /*
535 * p_dev->function_config must be the same for all card functions.
536 * Note that this is serialized by ops_mutex, so that only one
537 * such struct will be created.
538 */
539 list_for_each_entry(tmp_dev, &s->devices_list, socket_device_list)
540 if (p_dev->func == tmp_dev->func) {
541 p_dev->function_config = tmp_dev->function_config;
542 p_dev->irq = tmp_dev->irq;
543 kref_get(&p_dev->function_config->ref);
544 }
545
546 /* Add to the list in pcmcia_bus_socket */
547 list_add(&p_dev->socket_device_list, &s->devices_list);
548
549 if (pcmcia_setup_irq(p_dev))
550 dev_warn(&p_dev->dev,
551 "IRQ setup failed -- device might not work\n");
552
553 if (!p_dev->function_config) {
554 config_t *c;
555 dev_dbg(&p_dev->dev, "creating config_t\n");
556 c = kzalloc(sizeof(struct config_t), GFP_KERNEL);
557 if (!c) {
558 mutex_unlock(&s->ops_mutex);
559 goto err_unreg;
560 }
561 p_dev->function_config = c;
562 kref_init(&c->ref);
563 for (i = 0; i < MAX_IO_WIN; i++) {
564 c->io[i].name = p_dev->devname;
565 c->io[i].flags = IORESOURCE_IO;
566 }
567 for (i = 0; i < MAX_WIN; i++) {
568 c->mem[i].name = p_dev->devname;
569 c->mem[i].flags = IORESOURCE_MEM;
570 }
571 }
572 for (i = 0; i < MAX_IO_WIN; i++)
573 p_dev->resource[i] = &p_dev->function_config->io[i];
574 for (; i < (MAX_IO_WIN + MAX_WIN); i++)
575 p_dev->resource[i] = &p_dev->function_config->mem[i-MAX_IO_WIN];
576
577 mutex_unlock(&s->ops_mutex);
578
579 dev_notice(&p_dev->dev, "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#if defined(CONFIG_MTD_PCMCIA_ANONYMOUS)
635 /* Set up as an anonymous card. If we don't have anonymous
636 memory support then just error the card as there is no
637 point trying to second guess.
638
639 Note: some cards have just a device entry, it may be
640 worth extending support to cover these in future */
641 if (ret == -EIO) {
642 dev_info(&s->dev, "no CIS, assuming an anonymous memory card.\n");
643 pcmcia_replace_cis(s, "\xFF", 1);
644 no_chains = 1;
645 ret = 0;
646 } else
647#endif
648 {
649 dev_dbg(&s->dev, "invalid CIS or invalid resources\n");
650 return -ENODEV;
651 }
652 }
653
654 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
655 no_funcs = mfc.nfn;
656 else
657 no_funcs = 1;
658 s->functions = no_funcs;
659
660 for (i = 0; i < no_funcs; i++)
661 pcmcia_device_add(s, i);
662
663 return ret;
664}
665
666
667static int pcmcia_requery_callback(struct device *dev, void *_data)
668{
669 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
670 if (!p_dev->dev.driver) {
671 dev_dbg(dev, "update device information\n");
672 pcmcia_device_query(p_dev);
673 }
674
675 return 0;
676}
677
678
679static void pcmcia_requery(struct pcmcia_socket *s)
680{
681 int has_pfc;
682
683 if (!(s->state & SOCKET_PRESENT))
684 return;
685
686 if (s->functions == 0) {
687 pcmcia_card_add(s);
688 return;
689 }
690
691 /* some device information might have changed because of a CIS
692 * update or because we can finally read it correctly... so
693 * determine it again, overwriting old values if necessary. */
694 bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery_callback);
695
696 /* if the CIS changed, we need to check whether the number of
697 * functions changed. */
698 if (s->fake_cis) {
699 int old_funcs, new_funcs;
700 cistpl_longlink_mfc_t mfc;
701
702 /* does this cis override add or remove functions? */
703 old_funcs = s->functions;
704
705 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC,
706 &mfc))
707 new_funcs = mfc.nfn;
708 else
709 new_funcs = 1;
710 if (old_funcs != new_funcs) {
711 /* we need to re-start */
712 pcmcia_card_remove(s, NULL);
713 s->functions = 0;
714 pcmcia_card_add(s);
715 }
716 }
717
718 /* If the PCMCIA device consists of two pseudo devices,
719 * call pcmcia_device_add() -- which will fail if both
720 * devices are already registered. */
721 mutex_lock(&s->ops_mutex);
722 has_pfc = s->pcmcia_pfc;
723 mutex_unlock(&s->ops_mutex);
724 if (has_pfc)
725 pcmcia_device_add(s, 0);
726
727 /* we re-scan all devices, not just the ones connected to this
728 * socket. This does not matter, though. */
729 if (bus_rescan_devices(&pcmcia_bus_type))
730 dev_warn(&s->dev, "rescanning the bus failed\n");
731}
732
733
734#ifdef CONFIG_PCMCIA_LOAD_CIS
735
736/**
737 * pcmcia_load_firmware - load CIS from userspace if device-provided is broken
738 * @dev: the pcmcia device which needs a CIS override
739 * @filename: requested filename in /lib/firmware/
740 *
741 * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if
742 * the one provided by the card is broken. The firmware files reside in
743 * /lib/firmware/ in userspace.
744 */
745static int pcmcia_load_firmware(struct pcmcia_device *dev, char *filename)
746{
747 struct pcmcia_socket *s = dev->socket;
748 const struct firmware *fw;
749 int ret = -ENOMEM;
750 cistpl_longlink_mfc_t mfc;
751 int old_funcs, new_funcs = 1;
752
753 if (!filename)
754 return -EINVAL;
755
756 dev_dbg(&dev->dev, "trying to load CIS file %s\n", filename);
757
758 if (request_firmware(&fw, filename, &dev->dev) == 0) {
759 if (fw->size >= CISTPL_MAX_CIS_SIZE) {
760 ret = -EINVAL;
761 dev_err(&dev->dev, "pcmcia: CIS override is too big\n");
762 goto release;
763 }
764
765 if (!pcmcia_replace_cis(s, fw->data, fw->size))
766 ret = 0;
767 else {
768 dev_err(&dev->dev, "pcmcia: CIS override failed\n");
769 goto release;
770 }
771
772 /* we need to re-start if the number of functions changed */
773 old_funcs = s->functions;
774 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC,
775 &mfc))
776 new_funcs = mfc.nfn;
777
778 if (old_funcs != new_funcs)
779 ret = -EBUSY;
780
781 /* update information */
782 pcmcia_device_query(dev);
783
784 /* requery (as number of functions might have changed) */
785 pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY);
786 }
787 release:
788 release_firmware(fw);
789
790 return ret;
791}
792
793#else /* !CONFIG_PCMCIA_LOAD_CIS */
794
795static inline int pcmcia_load_firmware(struct pcmcia_device *dev,
796 char *filename)
797{
798 return -ENODEV;
799}
800
801#endif
802
803
804static inline int pcmcia_devmatch(struct pcmcia_device *dev,
805 const struct pcmcia_device_id *did)
806{
807 if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
808 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
809 return 0;
810 }
811
812 if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
813 if ((!dev->has_card_id) || (dev->card_id != did->card_id))
814 return 0;
815 }
816
817 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
818 if (dev->func != did->function)
819 return 0;
820 }
821
822 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
823 if (!dev->prod_id[0])
824 return 0;
825 if (strcmp(did->prod_id[0], dev->prod_id[0]))
826 return 0;
827 }
828
829 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
830 if (!dev->prod_id[1])
831 return 0;
832 if (strcmp(did->prod_id[1], dev->prod_id[1]))
833 return 0;
834 }
835
836 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
837 if (!dev->prod_id[2])
838 return 0;
839 if (strcmp(did->prod_id[2], dev->prod_id[2]))
840 return 0;
841 }
842
843 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
844 if (!dev->prod_id[3])
845 return 0;
846 if (strcmp(did->prod_id[3], dev->prod_id[3]))
847 return 0;
848 }
849
850 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
851 dev_dbg(&dev->dev, "this is a pseudo-multi-function device\n");
852 mutex_lock(&dev->socket->ops_mutex);
853 dev->socket->pcmcia_pfc = 1;
854 mutex_unlock(&dev->socket->ops_mutex);
855 if (dev->device_no != did->device_no)
856 return 0;
857 }
858
859 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
860 int ret;
861
862 if ((!dev->has_func_id) || (dev->func_id != did->func_id))
863 return 0;
864
865 /* if this is a pseudo-multi-function device,
866 * we need explicit matches */
867 if (dev->socket->pcmcia_pfc)
868 return 0;
869 if (dev->device_no)
870 return 0;
871
872 /* also, FUNC_ID matching needs to be activated by userspace
873 * after it has re-checked that there is no possible module
874 * with a prod_id/manf_id/card_id match.
875 */
876 mutex_lock(&dev->socket->ops_mutex);
877 ret = dev->allow_func_id_match;
878 mutex_unlock(&dev->socket->ops_mutex);
879
880 if (!ret) {
881 dev_dbg(&dev->dev,
882 "skipping FUNC_ID match until userspace ACK\n");
883 return 0;
884 }
885 }
886
887 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
888 dev_dbg(&dev->dev, "device needs a fake CIS\n");
889 if (!dev->socket->fake_cis)
890 if (pcmcia_load_firmware(dev, did->cisfile))
891 return 0;
892 }
893
894 if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
895 int i;
896 for (i = 0; i < 4; i++)
897 if (dev->prod_id[i])
898 return 0;
899 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
900 return 0;
901 }
902
903 return 1;
904}
905
906
907static int pcmcia_bus_match(struct device *dev, struct device_driver *drv)
908{
909 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
910 struct pcmcia_driver *p_drv = to_pcmcia_drv(drv);
911 const struct pcmcia_device_id *did = p_drv->id_table;
912 struct pcmcia_dynid *dynid;
913
914 /* match dynamic devices first */
915 mutex_lock(&p_drv->dynids.lock);
916 list_for_each_entry(dynid, &p_drv->dynids.list, node) {
917 dev_dbg(dev, "trying to match to %s\n", drv->name);
918 if (pcmcia_devmatch(p_dev, &dynid->id)) {
919 dev_dbg(dev, "matched to %s\n", drv->name);
920 mutex_unlock(&p_drv->dynids.lock);
921 return 1;
922 }
923 }
924 mutex_unlock(&p_drv->dynids.lock);
925
926 while (did && did->match_flags) {
927 dev_dbg(dev, "trying to match to %s\n", drv->name);
928 if (pcmcia_devmatch(p_dev, did)) {
929 dev_dbg(dev, "matched to %s\n", drv->name);
930 return 1;
931 }
932 did++;
933 }
934
935 return 0;
936}
937
938static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
939{
940 struct pcmcia_device *p_dev;
941 int i;
942 u32 hash[4] = { 0, 0, 0, 0};
943
944 if (!dev)
945 return -ENODEV;
946
947 p_dev = to_pcmcia_dev(dev);
948
949 /* calculate hashes */
950 for (i = 0; i < 4; i++) {
951 if (!p_dev->prod_id[i])
952 continue;
953 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
954 }
955
956 if (add_uevent_var(env, "SOCKET_NO=%u", p_dev->socket->sock))
957 return -ENOMEM;
958
959 if (add_uevent_var(env, "DEVICE_NO=%02X", p_dev->device_no))
960 return -ENOMEM;
961
962 if (add_uevent_var(env, "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
963 "pa%08Xpb%08Xpc%08Xpd%08X",
964 p_dev->has_manf_id ? p_dev->manf_id : 0,
965 p_dev->has_card_id ? p_dev->card_id : 0,
966 p_dev->has_func_id ? p_dev->func_id : 0,
967 p_dev->func,
968 p_dev->device_no,
969 hash[0],
970 hash[1],
971 hash[2],
972 hash[3]))
973 return -ENOMEM;
974
975 return 0;
976}
977
978/************************ runtime PM support ***************************/
979
980static int pcmcia_dev_suspend(struct device *dev);
981static int pcmcia_dev_resume(struct device *dev);
982
983static int runtime_suspend(struct device *dev)
984{
985 int rc;
986
987 device_lock(dev);
988 rc = pcmcia_dev_suspend(dev);
989 device_unlock(dev);
990 return rc;
991}
992
993static int runtime_resume(struct device *dev)
994{
995 int rc;
996
997 device_lock(dev);
998 rc = pcmcia_dev_resume(dev);
999 device_unlock(dev);
1000 return rc;
1001}
1002
1003/************************ per-device sysfs output ***************************/
1004
1005#define pcmcia_device_attr(field, test, format) \
1006static ssize_t field##_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->test ? sprintf(buf, format, p_dev->field) : -ENODEV; \
1010} \
1011static DEVICE_ATTR_RO(field);
1012
1013#define pcmcia_device_stringattr(name, field) \
1014static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf) \
1015{ \
1016 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
1017 return p_dev->field ? sprintf(buf, "%s\n", p_dev->field) : -ENODEV; \
1018} \
1019static DEVICE_ATTR_RO(name);
1020
1021pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
1022pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
1023pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
1024pcmcia_device_stringattr(prod_id1, prod_id[0]);
1025pcmcia_device_stringattr(prod_id2, prod_id[1]);
1026pcmcia_device_stringattr(prod_id3, prod_id[2]);
1027pcmcia_device_stringattr(prod_id4, prod_id[3]);
1028
1029static ssize_t function_show(struct device *dev, struct device_attribute *attr,
1030 char *buf)
1031{
1032 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1033 return p_dev->socket ? sprintf(buf, "0x%02x\n", p_dev->func) : -ENODEV;
1034}
1035static DEVICE_ATTR_RO(function);
1036
1037static ssize_t resources_show(struct device *dev,
1038 struct device_attribute *attr, char *buf)
1039{
1040 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1041 char *str = buf;
1042 int i;
1043
1044 for (i = 0; i < PCMCIA_NUM_RESOURCES; i++)
1045 str += sprintf(str, "%pr\n", p_dev->resource[i]);
1046
1047 return str - buf;
1048}
1049static DEVICE_ATTR_RO(resources);
1050
1051static ssize_t pm_state_show(struct device *dev, struct device_attribute *attr, char *buf)
1052{
1053 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1054
1055 if (p_dev->suspended)
1056 return sprintf(buf, "off\n");
1057 else
1058 return sprintf(buf, "on\n");
1059}
1060
1061static ssize_t pm_state_store(struct device *dev, struct device_attribute *attr,
1062 const char *buf, size_t count)
1063{
1064 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1065 int ret = 0;
1066
1067 if (!count)
1068 return -EINVAL;
1069
1070 if ((!p_dev->suspended) && !strncmp(buf, "off", 3))
1071 ret = runtime_suspend(dev);
1072 else if (p_dev->suspended && !strncmp(buf, "on", 2))
1073 ret = runtime_resume(dev);
1074
1075 return ret ? ret : count;
1076}
1077static DEVICE_ATTR_RW(pm_state);
1078
1079static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1080{
1081 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1082 int i;
1083 u32 hash[4] = { 0, 0, 0, 0};
1084
1085 /* calculate hashes */
1086 for (i = 0; i < 4; i++) {
1087 if (!p_dev->prod_id[i])
1088 continue;
1089 hash[i] = crc32(0, p_dev->prod_id[i],
1090 strlen(p_dev->prod_id[i]));
1091 }
1092 return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
1093 "pa%08Xpb%08Xpc%08Xpd%08X\n",
1094 p_dev->has_manf_id ? p_dev->manf_id : 0,
1095 p_dev->has_card_id ? p_dev->card_id : 0,
1096 p_dev->has_func_id ? p_dev->func_id : 0,
1097 p_dev->func, p_dev->device_no,
1098 hash[0], hash[1], hash[2], hash[3]);
1099}
1100static DEVICE_ATTR_RO(modalias);
1101
1102static ssize_t allow_func_id_match_store(struct device *dev,
1103 struct device_attribute *attr, const char *buf, size_t count)
1104{
1105 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1106
1107 if (!count)
1108 return -EINVAL;
1109
1110 mutex_lock(&p_dev->socket->ops_mutex);
1111 p_dev->allow_func_id_match = 1;
1112 mutex_unlock(&p_dev->socket->ops_mutex);
1113 pcmcia_parse_uevents(p_dev->socket, PCMCIA_UEVENT_REQUERY);
1114
1115 return count;
1116}
1117static DEVICE_ATTR_WO(allow_func_id_match);
1118
1119static struct attribute *pcmcia_dev_attrs[] = {
1120 &dev_attr_resources.attr,
1121 &dev_attr_pm_state.attr,
1122 &dev_attr_function.attr,
1123 &dev_attr_func_id.attr,
1124 &dev_attr_manf_id.attr,
1125 &dev_attr_card_id.attr,
1126 &dev_attr_prod_id1.attr,
1127 &dev_attr_prod_id2.attr,
1128 &dev_attr_prod_id3.attr,
1129 &dev_attr_prod_id4.attr,
1130 &dev_attr_modalias.attr,
1131 &dev_attr_allow_func_id_match.attr,
1132 NULL,
1133};
1134ATTRIBUTE_GROUPS(pcmcia_dev);
1135
1136/* PM support, also needed for reset */
1137
1138static int pcmcia_dev_suspend(struct device *dev)
1139{
1140 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1141 struct pcmcia_driver *p_drv = NULL;
1142 int ret = 0;
1143
1144 mutex_lock(&p_dev->socket->ops_mutex);
1145 if (p_dev->suspended) {
1146 mutex_unlock(&p_dev->socket->ops_mutex);
1147 return 0;
1148 }
1149 p_dev->suspended = 1;
1150 mutex_unlock(&p_dev->socket->ops_mutex);
1151
1152 dev_dbg(dev, "suspending\n");
1153
1154 if (dev->driver)
1155 p_drv = to_pcmcia_drv(dev->driver);
1156
1157 if (!p_drv)
1158 goto out;
1159
1160 if (p_drv->suspend) {
1161 ret = p_drv->suspend(p_dev);
1162 if (ret) {
1163 dev_err(dev,
1164 "pcmcia: device %s (driver %s) did not want to go to sleep (%d)\n",
1165 p_dev->devname, p_drv->name, ret);
1166 mutex_lock(&p_dev->socket->ops_mutex);
1167 p_dev->suspended = 0;
1168 mutex_unlock(&p_dev->socket->ops_mutex);
1169 goto out;
1170 }
1171 }
1172
1173 if (p_dev->device_no == p_dev->func) {
1174 dev_dbg(dev, "releasing configuration\n");
1175 pcmcia_release_configuration(p_dev);
1176 }
1177
1178 out:
1179 return ret;
1180}
1181
1182
1183static int pcmcia_dev_resume(struct device *dev)
1184{
1185 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1186 struct pcmcia_driver *p_drv = NULL;
1187 int ret = 0;
1188
1189 mutex_lock(&p_dev->socket->ops_mutex);
1190 if (!p_dev->suspended) {
1191 mutex_unlock(&p_dev->socket->ops_mutex);
1192 return 0;
1193 }
1194 p_dev->suspended = 0;
1195 mutex_unlock(&p_dev->socket->ops_mutex);
1196
1197 dev_dbg(dev, "resuming\n");
1198
1199 if (dev->driver)
1200 p_drv = to_pcmcia_drv(dev->driver);
1201
1202 if (!p_drv)
1203 goto out;
1204
1205 if (p_dev->device_no == p_dev->func) {
1206 dev_dbg(dev, "requesting configuration\n");
1207 ret = pcmcia_enable_device(p_dev);
1208 if (ret)
1209 goto out;
1210 }
1211
1212 if (p_drv->resume)
1213 ret = p_drv->resume(p_dev);
1214
1215 out:
1216 return ret;
1217}
1218
1219
1220static int pcmcia_bus_suspend_callback(struct device *dev, void *_data)
1221{
1222 struct pcmcia_socket *skt = _data;
1223 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1224
1225 if (p_dev->socket != skt || p_dev->suspended)
1226 return 0;
1227
1228 return runtime_suspend(dev);
1229}
1230
1231static int pcmcia_bus_resume_callback(struct device *dev, void *_data)
1232{
1233 struct pcmcia_socket *skt = _data;
1234 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1235
1236 if (p_dev->socket != skt || !p_dev->suspended)
1237 return 0;
1238
1239 runtime_resume(dev);
1240
1241 return 0;
1242}
1243
1244static int pcmcia_bus_resume(struct pcmcia_socket *skt)
1245{
1246 dev_dbg(&skt->dev, "resuming socket %d\n", skt->sock);
1247 bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback);
1248 return 0;
1249}
1250
1251static int pcmcia_bus_suspend(struct pcmcia_socket *skt)
1252{
1253 dev_dbg(&skt->dev, "suspending socket %d\n", skt->sock);
1254 if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt,
1255 pcmcia_bus_suspend_callback)) {
1256 pcmcia_bus_resume(skt);
1257 return -EIO;
1258 }
1259 return 0;
1260}
1261
1262static int pcmcia_bus_remove(struct pcmcia_socket *skt)
1263{
1264 atomic_set(&skt->present, 0);
1265 pcmcia_card_remove(skt, NULL);
1266
1267 mutex_lock(&skt->ops_mutex);
1268 destroy_cis_cache(skt);
1269 pcmcia_cleanup_irq(skt);
1270 mutex_unlock(&skt->ops_mutex);
1271
1272 return 0;
1273}
1274
1275static int pcmcia_bus_add(struct pcmcia_socket *skt)
1276{
1277 atomic_set(&skt->present, 1);
1278
1279 mutex_lock(&skt->ops_mutex);
1280 skt->pcmcia_pfc = 0;
1281 destroy_cis_cache(skt); /* to be on the safe side... */
1282 mutex_unlock(&skt->ops_mutex);
1283
1284 pcmcia_card_add(skt);
1285
1286 return 0;
1287}
1288
1289static int pcmcia_bus_early_resume(struct pcmcia_socket *skt)
1290{
1291 if (!verify_cis_cache(skt))
1292 return 0;
1293
1294 dev_dbg(&skt->dev, "cis mismatch - different card\n");
1295
1296 /* first, remove the card */
1297 pcmcia_bus_remove(skt);
1298
1299 mutex_lock(&skt->ops_mutex);
1300 destroy_cis_cache(skt);
1301 kfree(skt->fake_cis);
1302 skt->fake_cis = NULL;
1303 skt->functions = 0;
1304 mutex_unlock(&skt->ops_mutex);
1305
1306 /* now, add the new card */
1307 pcmcia_bus_add(skt);
1308 return 0;
1309}
1310
1311
1312/*
1313 * NOTE: This is racy. There's no guarantee the card will still be
1314 * physically present, even if the call to this function returns
1315 * non-NULL. Furthermore, the device driver most likely is unbound
1316 * almost immediately, so the timeframe where pcmcia_dev_present
1317 * returns NULL is probably really really small.
1318 */
1319struct pcmcia_device *pcmcia_dev_present(struct pcmcia_device *_p_dev)
1320{
1321 struct pcmcia_device *p_dev;
1322 struct pcmcia_device *ret = NULL;
1323
1324 p_dev = pcmcia_get_dev(_p_dev);
1325 if (!p_dev)
1326 return NULL;
1327
1328 if (atomic_read(&p_dev->socket->present) != 0)
1329 ret = p_dev;
1330
1331 pcmcia_put_dev(p_dev);
1332 return ret;
1333}
1334EXPORT_SYMBOL(pcmcia_dev_present);
1335
1336
1337static struct pcmcia_callback pcmcia_bus_callback = {
1338 .owner = THIS_MODULE,
1339 .add = pcmcia_bus_add,
1340 .remove = pcmcia_bus_remove,
1341 .requery = pcmcia_requery,
1342 .validate = pccard_validate_cis,
1343 .suspend = pcmcia_bus_suspend,
1344 .early_resume = pcmcia_bus_early_resume,
1345 .resume = pcmcia_bus_resume,
1346};
1347
1348static int pcmcia_bus_add_socket(struct device *dev,
1349 struct class_interface *class_intf)
1350{
1351 struct pcmcia_socket *socket = dev_get_drvdata(dev);
1352 int ret;
1353
1354 socket = pcmcia_get_socket(socket);
1355 if (!socket) {
1356 dev_err(dev, "PCMCIA obtaining reference to socket failed\n");
1357 return -ENODEV;
1358 }
1359
1360 ret = sysfs_create_bin_file(&dev->kobj, &pccard_cis_attr);
1361 if (ret) {
1362 dev_err(dev, "PCMCIA registration failed\n");
1363 pcmcia_put_socket(socket);
1364 return ret;
1365 }
1366
1367 INIT_LIST_HEAD(&socket->devices_list);
1368 socket->pcmcia_pfc = 0;
1369 socket->device_count = 0;
1370 atomic_set(&socket->present, 0);
1371
1372 ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback);
1373 if (ret) {
1374 dev_err(dev, "PCMCIA registration failed\n");
1375 pcmcia_put_socket(socket);
1376 return ret;
1377 }
1378
1379 return 0;
1380}
1381
1382static void pcmcia_bus_remove_socket(struct device *dev,
1383 struct class_interface *class_intf)
1384{
1385 struct pcmcia_socket *socket = dev_get_drvdata(dev);
1386
1387 if (!socket)
1388 return;
1389
1390 pccard_register_pcmcia(socket, NULL);
1391
1392 /* unregister any unbound devices */
1393 mutex_lock(&socket->skt_mutex);
1394 pcmcia_card_remove(socket, NULL);
1395 release_cis_mem(socket);
1396 mutex_unlock(&socket->skt_mutex);
1397
1398 sysfs_remove_bin_file(&dev->kobj, &pccard_cis_attr);
1399
1400 pcmcia_put_socket(socket);
1401
1402 return;
1403}
1404
1405
1406/* the pcmcia_bus_interface is used to handle pcmcia socket devices */
1407static struct class_interface pcmcia_bus_interface __refdata = {
1408 .class = &pcmcia_socket_class,
1409 .add_dev = &pcmcia_bus_add_socket,
1410 .remove_dev = &pcmcia_bus_remove_socket,
1411};
1412
1413static const struct dev_pm_ops pcmcia_bus_pm_ops = {
1414 SET_SYSTEM_SLEEP_PM_OPS(pcmcia_dev_suspend, pcmcia_dev_resume)
1415};
1416
1417struct bus_type pcmcia_bus_type = {
1418 .name = "pcmcia",
1419 .uevent = pcmcia_bus_uevent,
1420 .match = pcmcia_bus_match,
1421 .dev_groups = pcmcia_dev_groups,
1422 .probe = pcmcia_device_probe,
1423 .remove = pcmcia_device_remove,
1424 .pm = &pcmcia_bus_pm_ops,
1425};
1426
1427
1428static int __init init_pcmcia_bus(void)
1429{
1430 int ret;
1431
1432 ret = bus_register(&pcmcia_bus_type);
1433 if (ret < 0) {
1434 printk(KERN_WARNING "pcmcia: bus_register error: %d\n", ret);
1435 return ret;
1436 }
1437 ret = class_interface_register(&pcmcia_bus_interface);
1438 if (ret < 0) {
1439 printk(KERN_WARNING
1440 "pcmcia: class_interface_register error: %d\n", ret);
1441 bus_unregister(&pcmcia_bus_type);
1442 return ret;
1443 }
1444
1445 return 0;
1446}
1447fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that
1448 * pcmcia_socket_class is already registered */
1449
1450
1451static void __exit exit_pcmcia_bus(void)
1452{
1453 class_interface_unregister(&pcmcia_bus_interface);
1454
1455 bus_unregister(&pcmcia_bus_type);
1456}
1457module_exit(exit_pcmcia_bus);
1458
1459
1460MODULE_ALIAS("ds");