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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// 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 dev_set_name(&p_dev->dev, "%d.%d", p_dev->socket->sock, p_dev->device_no);
517 if (!dev_name(&p_dev->dev))
518 goto err_free;
519 p_dev->devname = kasprintf(GFP_KERNEL, "pcmcia%s", dev_name(&p_dev->dev));
520 if (!p_dev->devname)
521 goto err_free;
522 dev_dbg(&p_dev->dev, "devname is %s\n", p_dev->devname);
523
524 mutex_lock(&s->ops_mutex);
525
526 /*
527 * p_dev->function_config must be the same for all card functions.
528 * Note that this is serialized by ops_mutex, so that only one
529 * such struct will be created.
530 */
531 list_for_each_entry(tmp_dev, &s->devices_list, socket_device_list)
532 if (p_dev->func == tmp_dev->func) {
533 p_dev->function_config = tmp_dev->function_config;
534 p_dev->irq = tmp_dev->irq;
535 kref_get(&p_dev->function_config->ref);
536 }
537
538 /* Add to the list in pcmcia_bus_socket */
539 list_add(&p_dev->socket_device_list, &s->devices_list);
540
541 if (pcmcia_setup_irq(p_dev))
542 dev_warn(&p_dev->dev,
543 "IRQ setup failed -- device might not work\n");
544
545 if (!p_dev->function_config) {
546 config_t *c;
547 dev_dbg(&p_dev->dev, "creating config_t\n");
548 c = kzalloc(sizeof(struct config_t), GFP_KERNEL);
549 if (!c) {
550 mutex_unlock(&s->ops_mutex);
551 goto err_unreg;
552 }
553 p_dev->function_config = c;
554 kref_init(&c->ref);
555 for (i = 0; i < MAX_IO_WIN; i++) {
556 c->io[i].name = p_dev->devname;
557 c->io[i].flags = IORESOURCE_IO;
558 }
559 for (i = 0; i < MAX_WIN; i++) {
560 c->mem[i].name = p_dev->devname;
561 c->mem[i].flags = IORESOURCE_MEM;
562 }
563 }
564 for (i = 0; i < MAX_IO_WIN; i++)
565 p_dev->resource[i] = &p_dev->function_config->io[i];
566 for (; i < (MAX_IO_WIN + MAX_WIN); i++)
567 p_dev->resource[i] = &p_dev->function_config->mem[i-MAX_IO_WIN];
568
569 mutex_unlock(&s->ops_mutex);
570
571 dev_notice(&p_dev->dev, "pcmcia: registering new device %s (IRQ: %d)\n",
572 p_dev->devname, p_dev->irq);
573
574 pcmcia_device_query(p_dev);
575
576 if (device_register(&p_dev->dev))
577 goto err_unreg;
578
579 return p_dev;
580
581 err_unreg:
582 mutex_lock(&s->ops_mutex);
583 list_del(&p_dev->socket_device_list);
584 mutex_unlock(&s->ops_mutex);
585
586 err_free:
587 mutex_lock(&s->ops_mutex);
588 s->device_count--;
589 mutex_unlock(&s->ops_mutex);
590
591 for (i = 0; i < 4; i++)
592 kfree(p_dev->prod_id[i]);
593 kfree(p_dev->devname);
594 kfree(p_dev);
595 err_put:
596 pcmcia_put_socket(s);
597
598 return NULL;
599}
600
601
602static int pcmcia_card_add(struct pcmcia_socket *s)
603{
604 cistpl_longlink_mfc_t mfc;
605 unsigned int no_funcs, i, no_chains;
606 int ret = -EAGAIN;
607
608 mutex_lock(&s->ops_mutex);
609 if (!(s->resource_setup_done)) {
610 dev_dbg(&s->dev,
611 "no resources available, delaying card_add\n");
612 mutex_unlock(&s->ops_mutex);
613 return -EAGAIN; /* try again, but later... */
614 }
615
616 if (pcmcia_validate_mem(s)) {
617 dev_dbg(&s->dev, "validating mem resources failed, "
618 "delaying card_add\n");
619 mutex_unlock(&s->ops_mutex);
620 return -EAGAIN; /* try again, but later... */
621 }
622 mutex_unlock(&s->ops_mutex);
623
624 ret = pccard_validate_cis(s, &no_chains);
625 if (ret || !no_chains) {
626#if defined(CONFIG_MTD_PCMCIA_ANONYMOUS)
627 /* Set up as an anonymous card. If we don't have anonymous
628 memory support then just error the card as there is no
629 point trying to second guess.
630
631 Note: some cards have just a device entry, it may be
632 worth extending support to cover these in future */
633 if (ret == -EIO) {
634 dev_info(&s->dev, "no CIS, assuming an anonymous memory card.\n");
635 pcmcia_replace_cis(s, "\xFF", 1);
636 no_chains = 1;
637 ret = 0;
638 } else
639#endif
640 {
641 dev_dbg(&s->dev, "invalid CIS or invalid resources\n");
642 return -ENODEV;
643 }
644 }
645
646 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
647 no_funcs = mfc.nfn;
648 else
649 no_funcs = 1;
650 s->functions = no_funcs;
651
652 for (i = 0; i < no_funcs; i++)
653 pcmcia_device_add(s, i);
654
655 return ret;
656}
657
658
659static int pcmcia_requery_callback(struct device *dev, void *_data)
660{
661 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
662 if (!p_dev->dev.driver) {
663 dev_dbg(dev, "update device information\n");
664 pcmcia_device_query(p_dev);
665 }
666
667 return 0;
668}
669
670
671static void pcmcia_requery(struct pcmcia_socket *s)
672{
673 int has_pfc;
674
675 if (!(s->state & SOCKET_PRESENT))
676 return;
677
678 if (s->functions == 0) {
679 pcmcia_card_add(s);
680 return;
681 }
682
683 /* some device information might have changed because of a CIS
684 * update or because we can finally read it correctly... so
685 * determine it again, overwriting old values if necessary. */
686 bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery_callback);
687
688 /* if the CIS changed, we need to check whether the number of
689 * functions changed. */
690 if (s->fake_cis) {
691 int old_funcs, new_funcs;
692 cistpl_longlink_mfc_t mfc;
693
694 /* does this cis override add or remove functions? */
695 old_funcs = s->functions;
696
697 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC,
698 &mfc))
699 new_funcs = mfc.nfn;
700 else
701 new_funcs = 1;
702 if (old_funcs != new_funcs) {
703 /* we need to re-start */
704 pcmcia_card_remove(s, NULL);
705 s->functions = 0;
706 pcmcia_card_add(s);
707 }
708 }
709
710 /* If the PCMCIA device consists of two pseudo devices,
711 * call pcmcia_device_add() -- which will fail if both
712 * devices are already registered. */
713 mutex_lock(&s->ops_mutex);
714 has_pfc = s->pcmcia_pfc;
715 mutex_unlock(&s->ops_mutex);
716 if (has_pfc)
717 pcmcia_device_add(s, 0);
718
719 /* we re-scan all devices, not just the ones connected to this
720 * socket. This does not matter, though. */
721 if (bus_rescan_devices(&pcmcia_bus_type))
722 dev_warn(&s->dev, "rescanning the bus failed\n");
723}
724
725
726#ifdef CONFIG_PCMCIA_LOAD_CIS
727
728/**
729 * pcmcia_load_firmware - load CIS from userspace if device-provided is broken
730 * @dev: the pcmcia device which needs a CIS override
731 * @filename: requested filename in /lib/firmware/
732 *
733 * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if
734 * the one provided by the card is broken. The firmware files reside in
735 * /lib/firmware/ in userspace.
736 */
737static int pcmcia_load_firmware(struct pcmcia_device *dev, char *filename)
738{
739 struct pcmcia_socket *s = dev->socket;
740 const struct firmware *fw;
741 int ret = -ENOMEM;
742 cistpl_longlink_mfc_t mfc;
743 int old_funcs, new_funcs = 1;
744
745 if (!filename)
746 return -EINVAL;
747
748 dev_dbg(&dev->dev, "trying to load CIS file %s\n", filename);
749
750 if (request_firmware(&fw, filename, &dev->dev) == 0) {
751 if (fw->size >= CISTPL_MAX_CIS_SIZE) {
752 ret = -EINVAL;
753 dev_err(&dev->dev, "pcmcia: CIS override is too big\n");
754 goto release;
755 }
756
757 if (!pcmcia_replace_cis(s, fw->data, fw->size))
758 ret = 0;
759 else {
760 dev_err(&dev->dev, "pcmcia: CIS override failed\n");
761 goto release;
762 }
763
764 /* we need to re-start if the number of functions changed */
765 old_funcs = s->functions;
766 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC,
767 &mfc))
768 new_funcs = mfc.nfn;
769
770 if (old_funcs != new_funcs)
771 ret = -EBUSY;
772
773 /* update information */
774 pcmcia_device_query(dev);
775
776 /* requery (as number of functions might have changed) */
777 pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY);
778 }
779 release:
780 release_firmware(fw);
781
782 return ret;
783}
784
785#else /* !CONFIG_PCMCIA_LOAD_CIS */
786
787static inline int pcmcia_load_firmware(struct pcmcia_device *dev,
788 char *filename)
789{
790 return -ENODEV;
791}
792
793#endif
794
795
796static inline int pcmcia_devmatch(struct pcmcia_device *dev,
797 const struct pcmcia_device_id *did)
798{
799 if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
800 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
801 return 0;
802 }
803
804 if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
805 if ((!dev->has_card_id) || (dev->card_id != did->card_id))
806 return 0;
807 }
808
809 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
810 if (dev->func != did->function)
811 return 0;
812 }
813
814 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
815 if (!dev->prod_id[0])
816 return 0;
817 if (strcmp(did->prod_id[0], dev->prod_id[0]))
818 return 0;
819 }
820
821 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
822 if (!dev->prod_id[1])
823 return 0;
824 if (strcmp(did->prod_id[1], dev->prod_id[1]))
825 return 0;
826 }
827
828 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
829 if (!dev->prod_id[2])
830 return 0;
831 if (strcmp(did->prod_id[2], dev->prod_id[2]))
832 return 0;
833 }
834
835 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
836 if (!dev->prod_id[3])
837 return 0;
838 if (strcmp(did->prod_id[3], dev->prod_id[3]))
839 return 0;
840 }
841
842 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
843 dev_dbg(&dev->dev, "this is a pseudo-multi-function device\n");
844 mutex_lock(&dev->socket->ops_mutex);
845 dev->socket->pcmcia_pfc = 1;
846 mutex_unlock(&dev->socket->ops_mutex);
847 if (dev->device_no != did->device_no)
848 return 0;
849 }
850
851 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
852 int ret;
853
854 if ((!dev->has_func_id) || (dev->func_id != did->func_id))
855 return 0;
856
857 /* if this is a pseudo-multi-function device,
858 * we need explicit matches */
859 if (dev->socket->pcmcia_pfc)
860 return 0;
861 if (dev->device_no)
862 return 0;
863
864 /* also, FUNC_ID matching needs to be activated by userspace
865 * after it has re-checked that there is no possible module
866 * with a prod_id/manf_id/card_id match.
867 */
868 mutex_lock(&dev->socket->ops_mutex);
869 ret = dev->allow_func_id_match;
870 mutex_unlock(&dev->socket->ops_mutex);
871
872 if (!ret) {
873 dev_dbg(&dev->dev,
874 "skipping FUNC_ID match until userspace ACK\n");
875 return 0;
876 }
877 }
878
879 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
880 dev_dbg(&dev->dev, "device needs a fake CIS\n");
881 if (!dev->socket->fake_cis)
882 if (pcmcia_load_firmware(dev, did->cisfile))
883 return 0;
884 }
885
886 if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
887 int i;
888 for (i = 0; i < 4; i++)
889 if (dev->prod_id[i])
890 return 0;
891 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
892 return 0;
893 }
894
895 return 1;
896}
897
898
899static int pcmcia_bus_match(struct device *dev, struct device_driver *drv)
900{
901 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
902 struct pcmcia_driver *p_drv = to_pcmcia_drv(drv);
903 const struct pcmcia_device_id *did = p_drv->id_table;
904 struct pcmcia_dynid *dynid;
905
906 /* match dynamic devices first */
907 mutex_lock(&p_drv->dynids.lock);
908 list_for_each_entry(dynid, &p_drv->dynids.list, node) {
909 dev_dbg(dev, "trying to match to %s\n", drv->name);
910 if (pcmcia_devmatch(p_dev, &dynid->id)) {
911 dev_dbg(dev, "matched to %s\n", drv->name);
912 mutex_unlock(&p_drv->dynids.lock);
913 return 1;
914 }
915 }
916 mutex_unlock(&p_drv->dynids.lock);
917
918 while (did && did->match_flags) {
919 dev_dbg(dev, "trying to match to %s\n", drv->name);
920 if (pcmcia_devmatch(p_dev, did)) {
921 dev_dbg(dev, "matched to %s\n", drv->name);
922 return 1;
923 }
924 did++;
925 }
926
927 return 0;
928}
929
930static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
931{
932 struct pcmcia_device *p_dev;
933 int i;
934 u32 hash[4] = { 0, 0, 0, 0};
935
936 if (!dev)
937 return -ENODEV;
938
939 p_dev = to_pcmcia_dev(dev);
940
941 /* calculate hashes */
942 for (i = 0; i < 4; i++) {
943 if (!p_dev->prod_id[i])
944 continue;
945 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
946 }
947
948 if (add_uevent_var(env, "SOCKET_NO=%u", p_dev->socket->sock))
949 return -ENOMEM;
950
951 if (add_uevent_var(env, "DEVICE_NO=%02X", p_dev->device_no))
952 return -ENOMEM;
953
954 if (add_uevent_var(env, "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
955 "pa%08Xpb%08Xpc%08Xpd%08X",
956 p_dev->has_manf_id ? p_dev->manf_id : 0,
957 p_dev->has_card_id ? p_dev->card_id : 0,
958 p_dev->has_func_id ? p_dev->func_id : 0,
959 p_dev->func,
960 p_dev->device_no,
961 hash[0],
962 hash[1],
963 hash[2],
964 hash[3]))
965 return -ENOMEM;
966
967 return 0;
968}
969
970/************************ runtime PM support ***************************/
971
972static int pcmcia_dev_suspend(struct device *dev);
973static int pcmcia_dev_resume(struct device *dev);
974
975static int runtime_suspend(struct device *dev)
976{
977 int rc;
978
979 device_lock(dev);
980 rc = pcmcia_dev_suspend(dev);
981 device_unlock(dev);
982 return rc;
983}
984
985static int runtime_resume(struct device *dev)
986{
987 int rc;
988
989 device_lock(dev);
990 rc = pcmcia_dev_resume(dev);
991 device_unlock(dev);
992 return rc;
993}
994
995/************************ per-device sysfs output ***************************/
996
997#define pcmcia_device_attr(field, test, format) \
998static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf) \
999{ \
1000 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
1001 return p_dev->test ? sysfs_emit(buf, format, p_dev->field) : -ENODEV; \
1002} \
1003static DEVICE_ATTR_RO(field);
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 ? sysfs_emit(buf, "%s\n", p_dev->field) : -ENODEV; \
1010} \
1011static DEVICE_ATTR_RO(name);
1012
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 function_show(struct device *dev, struct device_attribute *attr,
1022 char *buf)
1023{
1024 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1025 return p_dev->socket ? sysfs_emit(buf, "0x%02x\n", p_dev->func) : -ENODEV;
1026}
1027static DEVICE_ATTR_RO(function);
1028
1029static ssize_t resources_show(struct device *dev,
1030 struct device_attribute *attr, char *buf)
1031{
1032 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1033 int i, at = 0;
1034
1035 for (i = 0; i < PCMCIA_NUM_RESOURCES; i++)
1036 at += sysfs_emit_at(buf, at, "%pr\n", p_dev->resource[i]);
1037
1038 return at;
1039}
1040static DEVICE_ATTR_RO(resources);
1041
1042static ssize_t pm_state_show(struct device *dev, struct device_attribute *attr, char *buf)
1043{
1044 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1045
1046 if (p_dev->suspended)
1047 return sysfs_emit(buf, "off\n");
1048 else
1049 return sysfs_emit(buf, "on\n");
1050}
1051
1052static ssize_t pm_state_store(struct device *dev, struct device_attribute *attr,
1053 const char *buf, size_t count)
1054{
1055 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1056 int ret = 0;
1057
1058 if (!count)
1059 return -EINVAL;
1060
1061 if ((!p_dev->suspended) && !strncmp(buf, "off", 3))
1062 ret = runtime_suspend(dev);
1063 else if (p_dev->suspended && !strncmp(buf, "on", 2))
1064 ret = runtime_resume(dev);
1065
1066 return ret ? ret : count;
1067}
1068static DEVICE_ATTR_RW(pm_state);
1069
1070static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1071{
1072 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1073 int i;
1074 u32 hash[4] = { 0, 0, 0, 0};
1075
1076 /* calculate hashes */
1077 for (i = 0; i < 4; i++) {
1078 if (!p_dev->prod_id[i])
1079 continue;
1080 hash[i] = crc32(0, p_dev->prod_id[i],
1081 strlen(p_dev->prod_id[i]));
1082 }
1083 return sysfs_emit(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02Xpa%08Xpb%08Xpc%08Xpd%08X\n",
1084 p_dev->has_manf_id ? p_dev->manf_id : 0,
1085 p_dev->has_card_id ? p_dev->card_id : 0,
1086 p_dev->has_func_id ? p_dev->func_id : 0,
1087 p_dev->func, p_dev->device_no,
1088 hash[0], hash[1], hash[2], hash[3]);
1089}
1090static DEVICE_ATTR_RO(modalias);
1091
1092static ssize_t allow_func_id_match_store(struct device *dev,
1093 struct device_attribute *attr, const char *buf, size_t count)
1094{
1095 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1096
1097 if (!count)
1098 return -EINVAL;
1099
1100 mutex_lock(&p_dev->socket->ops_mutex);
1101 p_dev->allow_func_id_match = 1;
1102 mutex_unlock(&p_dev->socket->ops_mutex);
1103 pcmcia_parse_uevents(p_dev->socket, PCMCIA_UEVENT_REQUERY);
1104
1105 return count;
1106}
1107static DEVICE_ATTR_WO(allow_func_id_match);
1108
1109static struct attribute *pcmcia_dev_attrs[] = {
1110 &dev_attr_resources.attr,
1111 &dev_attr_pm_state.attr,
1112 &dev_attr_function.attr,
1113 &dev_attr_func_id.attr,
1114 &dev_attr_manf_id.attr,
1115 &dev_attr_card_id.attr,
1116 &dev_attr_prod_id1.attr,
1117 &dev_attr_prod_id2.attr,
1118 &dev_attr_prod_id3.attr,
1119 &dev_attr_prod_id4.attr,
1120 &dev_attr_modalias.attr,
1121 &dev_attr_allow_func_id_match.attr,
1122 NULL,
1123};
1124ATTRIBUTE_GROUPS(pcmcia_dev);
1125
1126/* PM support, also needed for reset */
1127
1128static int pcmcia_dev_suspend(struct device *dev)
1129{
1130 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1131 struct pcmcia_driver *p_drv = NULL;
1132 int ret = 0;
1133
1134 mutex_lock(&p_dev->socket->ops_mutex);
1135 if (p_dev->suspended) {
1136 mutex_unlock(&p_dev->socket->ops_mutex);
1137 return 0;
1138 }
1139 p_dev->suspended = 1;
1140 mutex_unlock(&p_dev->socket->ops_mutex);
1141
1142 dev_dbg(dev, "suspending\n");
1143
1144 if (dev->driver)
1145 p_drv = to_pcmcia_drv(dev->driver);
1146
1147 if (!p_drv)
1148 goto out;
1149
1150 if (p_drv->suspend) {
1151 ret = p_drv->suspend(p_dev);
1152 if (ret) {
1153 dev_err(dev,
1154 "pcmcia: device %s (driver %s) did not want to go to sleep (%d)\n",
1155 p_dev->devname, p_drv->name, ret);
1156 mutex_lock(&p_dev->socket->ops_mutex);
1157 p_dev->suspended = 0;
1158 mutex_unlock(&p_dev->socket->ops_mutex);
1159 goto out;
1160 }
1161 }
1162
1163 if (p_dev->device_no == p_dev->func) {
1164 dev_dbg(dev, "releasing configuration\n");
1165 pcmcia_release_configuration(p_dev);
1166 }
1167
1168 out:
1169 return ret;
1170}
1171
1172
1173static int pcmcia_dev_resume(struct device *dev)
1174{
1175 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1176 struct pcmcia_driver *p_drv = NULL;
1177 int ret = 0;
1178
1179 mutex_lock(&p_dev->socket->ops_mutex);
1180 if (!p_dev->suspended) {
1181 mutex_unlock(&p_dev->socket->ops_mutex);
1182 return 0;
1183 }
1184 p_dev->suspended = 0;
1185 mutex_unlock(&p_dev->socket->ops_mutex);
1186
1187 dev_dbg(dev, "resuming\n");
1188
1189 if (dev->driver)
1190 p_drv = to_pcmcia_drv(dev->driver);
1191
1192 if (!p_drv)
1193 goto out;
1194
1195 if (p_dev->device_no == p_dev->func) {
1196 dev_dbg(dev, "requesting configuration\n");
1197 ret = pcmcia_enable_device(p_dev);
1198 if (ret)
1199 goto out;
1200 }
1201
1202 if (p_drv->resume)
1203 ret = p_drv->resume(p_dev);
1204
1205 out:
1206 return ret;
1207}
1208
1209
1210static int pcmcia_bus_suspend_callback(struct device *dev, void *_data)
1211{
1212 struct pcmcia_socket *skt = _data;
1213 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1214
1215 if (p_dev->socket != skt || p_dev->suspended)
1216 return 0;
1217
1218 return runtime_suspend(dev);
1219}
1220
1221static int pcmcia_bus_resume_callback(struct device *dev, void *_data)
1222{
1223 struct pcmcia_socket *skt = _data;
1224 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1225
1226 if (p_dev->socket != skt || !p_dev->suspended)
1227 return 0;
1228
1229 runtime_resume(dev);
1230
1231 return 0;
1232}
1233
1234static int pcmcia_bus_resume(struct pcmcia_socket *skt)
1235{
1236 dev_dbg(&skt->dev, "resuming socket %d\n", skt->sock);
1237 bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback);
1238 return 0;
1239}
1240
1241static int pcmcia_bus_suspend(struct pcmcia_socket *skt)
1242{
1243 dev_dbg(&skt->dev, "suspending socket %d\n", skt->sock);
1244 if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt,
1245 pcmcia_bus_suspend_callback)) {
1246 pcmcia_bus_resume(skt);
1247 return -EIO;
1248 }
1249 return 0;
1250}
1251
1252static int pcmcia_bus_remove(struct pcmcia_socket *skt)
1253{
1254 atomic_set(&skt->present, 0);
1255 pcmcia_card_remove(skt, NULL);
1256
1257 mutex_lock(&skt->ops_mutex);
1258 destroy_cis_cache(skt);
1259 pcmcia_cleanup_irq(skt);
1260 mutex_unlock(&skt->ops_mutex);
1261
1262 return 0;
1263}
1264
1265static int pcmcia_bus_add(struct pcmcia_socket *skt)
1266{
1267 atomic_set(&skt->present, 1);
1268
1269 mutex_lock(&skt->ops_mutex);
1270 skt->pcmcia_pfc = 0;
1271 destroy_cis_cache(skt); /* to be on the safe side... */
1272 mutex_unlock(&skt->ops_mutex);
1273
1274 pcmcia_card_add(skt);
1275
1276 return 0;
1277}
1278
1279static int pcmcia_bus_early_resume(struct pcmcia_socket *skt)
1280{
1281 if (!verify_cis_cache(skt))
1282 return 0;
1283
1284 dev_dbg(&skt->dev, "cis mismatch - different card\n");
1285
1286 /* first, remove the card */
1287 pcmcia_bus_remove(skt);
1288
1289 mutex_lock(&skt->ops_mutex);
1290 destroy_cis_cache(skt);
1291 kfree(skt->fake_cis);
1292 skt->fake_cis = NULL;
1293 skt->functions = 0;
1294 mutex_unlock(&skt->ops_mutex);
1295
1296 /* now, add the new card */
1297 pcmcia_bus_add(skt);
1298 return 0;
1299}
1300
1301
1302/*
1303 * NOTE: This is racy. There's no guarantee the card will still be
1304 * physically present, even if the call to this function returns
1305 * non-NULL. Furthermore, the device driver most likely is unbound
1306 * almost immediately, so the timeframe where pcmcia_dev_present
1307 * returns NULL is probably really really small.
1308 */
1309struct pcmcia_device *pcmcia_dev_present(struct pcmcia_device *_p_dev)
1310{
1311 struct pcmcia_device *p_dev;
1312 struct pcmcia_device *ret = NULL;
1313
1314 p_dev = pcmcia_get_dev(_p_dev);
1315 if (!p_dev)
1316 return NULL;
1317
1318 if (atomic_read(&p_dev->socket->present) != 0)
1319 ret = p_dev;
1320
1321 pcmcia_put_dev(p_dev);
1322 return ret;
1323}
1324EXPORT_SYMBOL(pcmcia_dev_present);
1325
1326
1327static struct pcmcia_callback pcmcia_bus_callback = {
1328 .owner = THIS_MODULE,
1329 .add = pcmcia_bus_add,
1330 .remove = pcmcia_bus_remove,
1331 .requery = pcmcia_requery,
1332 .validate = pccard_validate_cis,
1333 .suspend = pcmcia_bus_suspend,
1334 .early_resume = pcmcia_bus_early_resume,
1335 .resume = pcmcia_bus_resume,
1336};
1337
1338static int pcmcia_bus_add_socket(struct device *dev,
1339 struct class_interface *class_intf)
1340{
1341 struct pcmcia_socket *socket = dev_get_drvdata(dev);
1342 int ret;
1343
1344 socket = pcmcia_get_socket(socket);
1345 if (!socket) {
1346 dev_err(dev, "PCMCIA obtaining reference to socket failed\n");
1347 return -ENODEV;
1348 }
1349
1350 ret = sysfs_create_bin_file(&dev->kobj, &pccard_cis_attr);
1351 if (ret) {
1352 dev_err(dev, "PCMCIA registration failed\n");
1353 pcmcia_put_socket(socket);
1354 return ret;
1355 }
1356
1357 INIT_LIST_HEAD(&socket->devices_list);
1358 socket->pcmcia_pfc = 0;
1359 socket->device_count = 0;
1360 atomic_set(&socket->present, 0);
1361
1362 ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback);
1363 if (ret) {
1364 dev_err(dev, "PCMCIA registration failed\n");
1365 pcmcia_put_socket(socket);
1366 return ret;
1367 }
1368
1369 return 0;
1370}
1371
1372static void pcmcia_bus_remove_socket(struct device *dev,
1373 struct class_interface *class_intf)
1374{
1375 struct pcmcia_socket *socket = dev_get_drvdata(dev);
1376
1377 if (!socket)
1378 return;
1379
1380 pccard_register_pcmcia(socket, NULL);
1381
1382 /* unregister any unbound devices */
1383 mutex_lock(&socket->skt_mutex);
1384 pcmcia_card_remove(socket, NULL);
1385 release_cis_mem(socket);
1386 mutex_unlock(&socket->skt_mutex);
1387
1388 sysfs_remove_bin_file(&dev->kobj, &pccard_cis_attr);
1389
1390 pcmcia_put_socket(socket);
1391
1392 return;
1393}
1394
1395
1396/* the pcmcia_bus_interface is used to handle pcmcia socket devices */
1397static struct class_interface pcmcia_bus_interface __refdata = {
1398 .class = &pcmcia_socket_class,
1399 .add_dev = &pcmcia_bus_add_socket,
1400 .remove_dev = &pcmcia_bus_remove_socket,
1401};
1402
1403static const struct dev_pm_ops pcmcia_bus_pm_ops = {
1404 SET_SYSTEM_SLEEP_PM_OPS(pcmcia_dev_suspend, pcmcia_dev_resume)
1405};
1406
1407struct bus_type pcmcia_bus_type = {
1408 .name = "pcmcia",
1409 .uevent = pcmcia_bus_uevent,
1410 .match = pcmcia_bus_match,
1411 .dev_groups = pcmcia_dev_groups,
1412 .probe = pcmcia_device_probe,
1413 .remove = pcmcia_device_remove,
1414 .pm = &pcmcia_bus_pm_ops,
1415};
1416
1417
1418static int __init init_pcmcia_bus(void)
1419{
1420 int ret;
1421
1422 ret = bus_register(&pcmcia_bus_type);
1423 if (ret < 0) {
1424 printk(KERN_WARNING "pcmcia: bus_register error: %d\n", ret);
1425 return ret;
1426 }
1427 ret = class_interface_register(&pcmcia_bus_interface);
1428 if (ret < 0) {
1429 printk(KERN_WARNING
1430 "pcmcia: class_interface_register error: %d\n", ret);
1431 bus_unregister(&pcmcia_bus_type);
1432 return ret;
1433 }
1434
1435 return 0;
1436}
1437fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that
1438 * pcmcia_socket_class is already registered */
1439
1440
1441static void __exit exit_pcmcia_bus(void)
1442{
1443 class_interface_unregister(&pcmcia_bus_interface);
1444
1445 bus_unregister(&pcmcia_bus_type);
1446}
1447module_exit(exit_pcmcia_bus);
1448
1449
1450MODULE_ALIAS("ds");