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1/*
2 * ds.c -- 16-bit PCMCIA core support
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
7 *
8 * The initial developer of the original code is David A. Hinds
9 * <dahinds@users.sourceforge.net>. Portions created by David A. Hinds
10 * are Copyright (C) 1999 David A. Hinds. All Rights Reserved.
11 *
12 * (C) 1999 David A. Hinds
13 * (C) 2003 - 2010 Dominik Brodowski
14 */
15
16#include <linux/kernel.h>
17#include <linux/module.h>
18#include <linux/init.h>
19#include <linux/errno.h>
20#include <linux/list.h>
21#include <linux/delay.h>
22#include <linux/workqueue.h>
23#include <linux/crc32.h>
24#include <linux/firmware.h>
25#include <linux/kref.h>
26#include <linux/dma-mapping.h>
27#include <linux/slab.h>
28
29#include <pcmcia/cistpl.h>
30#include <pcmcia/ds.h>
31#include <pcmcia/ss.h>
32
33#include "cs_internal.h"
34
35/*====================================================================*/
36
37/* Module parameters */
38
39MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
40MODULE_DESCRIPTION("PCMCIA Driver Services");
41MODULE_LICENSE("GPL");
42
43
44/*====================================================================*/
45
46static void pcmcia_check_driver(struct pcmcia_driver *p_drv)
47{
48 const struct pcmcia_device_id *did = p_drv->id_table;
49 unsigned int i;
50 u32 hash;
51
52 if (!p_drv->probe || !p_drv->remove)
53 printk(KERN_DEBUG "pcmcia: %s lacks a requisite callback "
54 "function\n", p_drv->name);
55
56 while (did && did->match_flags) {
57 for (i = 0; i < 4; i++) {
58 if (!did->prod_id[i])
59 continue;
60
61 hash = crc32(0, did->prod_id[i], strlen(did->prod_id[i]));
62 if (hash == did->prod_id_hash[i])
63 continue;
64
65 printk(KERN_DEBUG "pcmcia: %s: invalid hash for "
66 "product string \"%s\": is 0x%x, should "
67 "be 0x%x\n", p_drv->name, did->prod_id[i],
68 did->prod_id_hash[i], hash);
69 printk(KERN_DEBUG "pcmcia: see "
70 "Documentation/pcmcia/devicetable.txt for "
71 "details\n");
72 }
73 did++;
74 }
75
76 return;
77}
78
79
80/*======================================================================*/
81
82
83struct pcmcia_dynid {
84 struct list_head node;
85 struct pcmcia_device_id id;
86};
87
88/**
89 * pcmcia_store_new_id - add a new PCMCIA device ID to this driver and re-probe devices
90 * @driver: target device driver
91 * @buf: buffer for scanning device ID data
92 * @count: input size
93 *
94 * Adds a new dynamic PCMCIA device ID to this driver,
95 * and causes the driver to probe for all devices again.
96 */
97static ssize_t
98pcmcia_store_new_id(struct device_driver *driver, const char *buf, size_t count)
99{
100 struct pcmcia_dynid *dynid;
101 struct pcmcia_driver *pdrv = to_pcmcia_drv(driver);
102 __u16 match_flags, manf_id, card_id;
103 __u8 func_id, function, device_no;
104 __u32 prod_id_hash[4] = {0, 0, 0, 0};
105 int fields = 0;
106 int retval = 0;
107
108 fields = sscanf(buf, "%hx %hx %hx %hhx %hhx %hhx %x %x %x %x",
109 &match_flags, &manf_id, &card_id, &func_id, &function, &device_no,
110 &prod_id_hash[0], &prod_id_hash[1], &prod_id_hash[2], &prod_id_hash[3]);
111 if (fields < 6)
112 return -EINVAL;
113
114 dynid = kzalloc(sizeof(struct pcmcia_dynid), GFP_KERNEL);
115 if (!dynid)
116 return -ENOMEM;
117
118 dynid->id.match_flags = match_flags;
119 dynid->id.manf_id = manf_id;
120 dynid->id.card_id = card_id;
121 dynid->id.func_id = func_id;
122 dynid->id.function = function;
123 dynid->id.device_no = device_no;
124 memcpy(dynid->id.prod_id_hash, prod_id_hash, sizeof(__u32) * 4);
125
126 mutex_lock(&pdrv->dynids.lock);
127 list_add_tail(&dynid->node, &pdrv->dynids.list);
128 mutex_unlock(&pdrv->dynids.lock);
129
130 if (get_driver(&pdrv->drv)) {
131 retval = driver_attach(&pdrv->drv);
132 put_driver(&pdrv->drv);
133 }
134
135 if (retval)
136 return retval;
137 return count;
138}
139static DRIVER_ATTR(new_id, S_IWUSR, NULL, pcmcia_store_new_id);
140
141static void
142pcmcia_free_dynids(struct pcmcia_driver *drv)
143{
144 struct pcmcia_dynid *dynid, *n;
145
146 mutex_lock(&drv->dynids.lock);
147 list_for_each_entry_safe(dynid, n, &drv->dynids.list, node) {
148 list_del(&dynid->node);
149 kfree(dynid);
150 }
151 mutex_unlock(&drv->dynids.lock);
152}
153
154static int
155pcmcia_create_newid_file(struct pcmcia_driver *drv)
156{
157 int error = 0;
158 if (drv->probe != NULL)
159 error = driver_create_file(&drv->drv, &driver_attr_new_id);
160 return error;
161}
162
163
164/**
165 * pcmcia_register_driver - register a PCMCIA driver with the bus core
166 * @driver: the &driver being registered
167 *
168 * Registers a PCMCIA driver with the PCMCIA bus core.
169 */
170int pcmcia_register_driver(struct pcmcia_driver *driver)
171{
172 int error;
173
174 if (!driver)
175 return -EINVAL;
176
177 pcmcia_check_driver(driver);
178
179 /* initialize common fields */
180 driver->drv.bus = &pcmcia_bus_type;
181 driver->drv.owner = driver->owner;
182 driver->drv.name = driver->name;
183 mutex_init(&driver->dynids.lock);
184 INIT_LIST_HEAD(&driver->dynids.list);
185
186 pr_debug("registering driver %s\n", driver->name);
187
188 error = driver_register(&driver->drv);
189 if (error < 0)
190 return error;
191
192 error = pcmcia_create_newid_file(driver);
193 if (error)
194 driver_unregister(&driver->drv);
195
196 return error;
197}
198EXPORT_SYMBOL(pcmcia_register_driver);
199
200/**
201 * pcmcia_unregister_driver - unregister a PCMCIA driver with the bus core
202 * @driver: the &driver being unregistered
203 */
204void pcmcia_unregister_driver(struct pcmcia_driver *driver)
205{
206 pr_debug("unregistering driver %s\n", driver->name);
207 driver_unregister(&driver->drv);
208 pcmcia_free_dynids(driver);
209}
210EXPORT_SYMBOL(pcmcia_unregister_driver);
211
212
213/* pcmcia_device handling */
214
215static struct pcmcia_device *pcmcia_get_dev(struct pcmcia_device *p_dev)
216{
217 struct device *tmp_dev;
218 tmp_dev = get_device(&p_dev->dev);
219 if (!tmp_dev)
220 return NULL;
221 return to_pcmcia_dev(tmp_dev);
222}
223
224static void pcmcia_put_dev(struct pcmcia_device *p_dev)
225{
226 if (p_dev)
227 put_device(&p_dev->dev);
228}
229
230static void pcmcia_release_function(struct kref *ref)
231{
232 struct config_t *c = container_of(ref, struct config_t, ref);
233 pr_debug("releasing config_t\n");
234 kfree(c);
235}
236
237static void pcmcia_release_dev(struct device *dev)
238{
239 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
240 int i;
241 dev_dbg(dev, "releasing device\n");
242 pcmcia_put_socket(p_dev->socket);
243 for (i = 0; i < 4; i++)
244 kfree(p_dev->prod_id[i]);
245 kfree(p_dev->devname);
246 kref_put(&p_dev->function_config->ref, pcmcia_release_function);
247 kfree(p_dev);
248}
249
250
251static int pcmcia_device_probe(struct device *dev)
252{
253 struct pcmcia_device *p_dev;
254 struct pcmcia_driver *p_drv;
255 struct pcmcia_socket *s;
256 cistpl_config_t cis_config;
257 int ret = 0;
258
259 dev = get_device(dev);
260 if (!dev)
261 return -ENODEV;
262
263 p_dev = to_pcmcia_dev(dev);
264 p_drv = to_pcmcia_drv(dev->driver);
265 s = p_dev->socket;
266
267 dev_dbg(dev, "trying to bind to %s\n", p_drv->name);
268
269 if ((!p_drv->probe) || (!p_dev->function_config) ||
270 (!try_module_get(p_drv->owner))) {
271 ret = -EINVAL;
272 goto put_dev;
273 }
274
275 /* set up some more device information */
276 ret = pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_CONFIG,
277 &cis_config);
278 if (!ret) {
279 p_dev->config_base = cis_config.base;
280 p_dev->config_regs = cis_config.rmask[0];
281 dev_dbg(dev, "base %x, regs %x", p_dev->config_base,
282 p_dev->config_regs);
283 } else {
284 dev_printk(KERN_INFO, dev,
285 "pcmcia: could not parse base and rmask0 of CIS\n");
286 p_dev->config_base = 0;
287 p_dev->config_regs = 0;
288 }
289
290 ret = p_drv->probe(p_dev);
291 if (ret) {
292 dev_dbg(dev, "binding to %s failed with %d\n",
293 p_drv->name, ret);
294 goto put_module;
295 }
296 dev_dbg(dev, "%s bound: Vpp %d.%d, idx %x, IRQ %d", p_drv->name,
297 p_dev->vpp/10, p_dev->vpp%10, p_dev->config_index, p_dev->irq);
298 dev_dbg(dev, "resources: ioport %pR %pR iomem %pR %pR %pR",
299 p_dev->resource[0], p_dev->resource[1], p_dev->resource[2],
300 p_dev->resource[3], p_dev->resource[4]);
301
302 mutex_lock(&s->ops_mutex);
303 if ((s->pcmcia_pfc) &&
304 (p_dev->socket->device_count == 1) && (p_dev->device_no == 0))
305 pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY);
306 mutex_unlock(&s->ops_mutex);
307
308put_module:
309 if (ret)
310 module_put(p_drv->owner);
311put_dev:
312 if (ret)
313 put_device(dev);
314 return ret;
315}
316
317
318/*
319 * Removes a PCMCIA card from the device tree and socket list.
320 */
321static void pcmcia_card_remove(struct pcmcia_socket *s, struct pcmcia_device *leftover)
322{
323 struct pcmcia_device *p_dev;
324 struct pcmcia_device *tmp;
325
326 dev_dbg(leftover ? &leftover->dev : &s->dev,
327 "pcmcia_card_remove(%d) %s\n", s->sock,
328 leftover ? leftover->devname : "");
329
330 mutex_lock(&s->ops_mutex);
331 if (!leftover)
332 s->device_count = 0;
333 else
334 s->device_count = 1;
335 mutex_unlock(&s->ops_mutex);
336
337 /* unregister all pcmcia_devices registered with this socket, except leftover */
338 list_for_each_entry_safe(p_dev, tmp, &s->devices_list, socket_device_list) {
339 if (p_dev == leftover)
340 continue;
341
342 mutex_lock(&s->ops_mutex);
343 list_del(&p_dev->socket_device_list);
344 mutex_unlock(&s->ops_mutex);
345
346 dev_dbg(&p_dev->dev, "unregistering device\n");
347 device_unregister(&p_dev->dev);
348 }
349
350 return;
351}
352
353static int pcmcia_device_remove(struct device *dev)
354{
355 struct pcmcia_device *p_dev;
356 struct pcmcia_driver *p_drv;
357 int i;
358
359 p_dev = to_pcmcia_dev(dev);
360 p_drv = to_pcmcia_drv(dev->driver);
361
362 dev_dbg(dev, "removing device\n");
363
364 /* If we're removing the primary module driving a
365 * pseudo multi-function card, we need to unbind
366 * all devices
367 */
368 if ((p_dev->socket->pcmcia_pfc) &&
369 (p_dev->socket->device_count > 0) &&
370 (p_dev->device_no == 0))
371 pcmcia_card_remove(p_dev->socket, p_dev);
372
373 /* detach the "instance" */
374 if (!p_drv)
375 return 0;
376
377 if (p_drv->remove)
378 p_drv->remove(p_dev);
379
380 /* check for proper unloading */
381 if (p_dev->_irq || p_dev->_io || p_dev->_locked)
382 dev_printk(KERN_INFO, dev,
383 "pcmcia: driver %s did not release config properly\n",
384 p_drv->name);
385
386 for (i = 0; i < MAX_WIN; i++)
387 if (p_dev->_win & CLIENT_WIN_REQ(i))
388 dev_printk(KERN_INFO, dev,
389 "pcmcia: driver %s did not release window properly\n",
390 p_drv->name);
391
392 /* references from pcmcia_probe_device */
393 pcmcia_put_dev(p_dev);
394 module_put(p_drv->owner);
395
396 return 0;
397}
398
399
400/*
401 * pcmcia_device_query -- determine information about a pcmcia device
402 */
403static int pcmcia_device_query(struct pcmcia_device *p_dev)
404{
405 cistpl_manfid_t manf_id;
406 cistpl_funcid_t func_id;
407 cistpl_vers_1_t *vers1;
408 unsigned int i;
409
410 vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL);
411 if (!vers1)
412 return -ENOMEM;
413
414 if (!pccard_read_tuple(p_dev->socket, BIND_FN_ALL,
415 CISTPL_MANFID, &manf_id)) {
416 mutex_lock(&p_dev->socket->ops_mutex);
417 p_dev->manf_id = manf_id.manf;
418 p_dev->card_id = manf_id.card;
419 p_dev->has_manf_id = 1;
420 p_dev->has_card_id = 1;
421 mutex_unlock(&p_dev->socket->ops_mutex);
422 }
423
424 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
425 CISTPL_FUNCID, &func_id)) {
426 mutex_lock(&p_dev->socket->ops_mutex);
427 p_dev->func_id = func_id.func;
428 p_dev->has_func_id = 1;
429 mutex_unlock(&p_dev->socket->ops_mutex);
430 } else {
431 /* rule of thumb: cards with no FUNCID, but with
432 * common memory device geometry information, are
433 * probably memory cards (from pcmcia-cs) */
434 cistpl_device_geo_t *devgeo;
435
436 devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL);
437 if (!devgeo) {
438 kfree(vers1);
439 return -ENOMEM;
440 }
441 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
442 CISTPL_DEVICE_GEO, devgeo)) {
443 dev_dbg(&p_dev->dev,
444 "mem device geometry probably means "
445 "FUNCID_MEMORY\n");
446 mutex_lock(&p_dev->socket->ops_mutex);
447 p_dev->func_id = CISTPL_FUNCID_MEMORY;
448 p_dev->has_func_id = 1;
449 mutex_unlock(&p_dev->socket->ops_mutex);
450 }
451 kfree(devgeo);
452 }
453
454 if (!pccard_read_tuple(p_dev->socket, BIND_FN_ALL, CISTPL_VERS_1,
455 vers1)) {
456 mutex_lock(&p_dev->socket->ops_mutex);
457 for (i = 0; i < min_t(unsigned int, 4, vers1->ns); i++) {
458 char *tmp;
459 unsigned int length;
460 char *new;
461
462 tmp = vers1->str + vers1->ofs[i];
463
464 length = strlen(tmp) + 1;
465 if ((length < 2) || (length > 255))
466 continue;
467
468 new = kmalloc(sizeof(char) * length, GFP_KERNEL);
469 if (!new)
470 continue;
471
472 new = strncpy(new, tmp, length);
473
474 tmp = p_dev->prod_id[i];
475 p_dev->prod_id[i] = new;
476 kfree(tmp);
477 }
478 mutex_unlock(&p_dev->socket->ops_mutex);
479 }
480
481 kfree(vers1);
482 return 0;
483}
484
485
486static struct pcmcia_device *pcmcia_device_add(struct pcmcia_socket *s,
487 unsigned int function)
488{
489 struct pcmcia_device *p_dev, *tmp_dev;
490 int i;
491
492 s = pcmcia_get_socket(s);
493 if (!s)
494 return NULL;
495
496 pr_debug("adding device to %d, function %d\n", s->sock, function);
497
498 p_dev = kzalloc(sizeof(struct pcmcia_device), GFP_KERNEL);
499 if (!p_dev)
500 goto err_put;
501
502 mutex_lock(&s->ops_mutex);
503 p_dev->device_no = (s->device_count++);
504 mutex_unlock(&s->ops_mutex);
505
506 /* max of 2 PFC devices */
507 if ((p_dev->device_no >= 2) && (function == 0))
508 goto err_free;
509
510 /* max of 4 devices overall */
511 if (p_dev->device_no >= 4)
512 goto err_free;
513
514 p_dev->socket = s;
515 p_dev->func = function;
516
517 p_dev->dev.bus = &pcmcia_bus_type;
518 p_dev->dev.parent = s->dev.parent;
519 p_dev->dev.release = pcmcia_release_dev;
520 /* by default don't allow DMA */
521 p_dev->dma_mask = DMA_MASK_NONE;
522 p_dev->dev.dma_mask = &p_dev->dma_mask;
523 dev_set_name(&p_dev->dev, "%d.%d", p_dev->socket->sock, p_dev->device_no);
524 if (!dev_name(&p_dev->dev))
525 goto err_free;
526 p_dev->devname = kasprintf(GFP_KERNEL, "pcmcia%s", dev_name(&p_dev->dev));
527 if (!p_dev->devname)
528 goto err_free;
529 dev_dbg(&p_dev->dev, "devname is %s\n", p_dev->devname);
530
531 mutex_lock(&s->ops_mutex);
532
533 /*
534 * p_dev->function_config must be the same for all card functions.
535 * Note that this is serialized by ops_mutex, so that only one
536 * such struct will be created.
537 */
538 list_for_each_entry(tmp_dev, &s->devices_list, socket_device_list)
539 if (p_dev->func == tmp_dev->func) {
540 p_dev->function_config = tmp_dev->function_config;
541 p_dev->irq = tmp_dev->irq;
542 kref_get(&p_dev->function_config->ref);
543 }
544
545 /* Add to the list in pcmcia_bus_socket */
546 list_add(&p_dev->socket_device_list, &s->devices_list);
547
548 if (pcmcia_setup_irq(p_dev))
549 dev_warn(&p_dev->dev,
550 "IRQ setup failed -- device might not work\n");
551
552 if (!p_dev->function_config) {
553 config_t *c;
554 dev_dbg(&p_dev->dev, "creating config_t\n");
555 c = kzalloc(sizeof(struct config_t), GFP_KERNEL);
556 if (!c) {
557 mutex_unlock(&s->ops_mutex);
558 goto err_unreg;
559 }
560 p_dev->function_config = c;
561 kref_init(&c->ref);
562 for (i = 0; i < MAX_IO_WIN; i++) {
563 c->io[i].name = p_dev->devname;
564 c->io[i].flags = IORESOURCE_IO;
565 }
566 for (i = 0; i< MAX_WIN; i++) {
567 c->mem[i].name = p_dev->devname;
568 c->mem[i].flags = IORESOURCE_MEM;
569 }
570 }
571 for (i = 0; i < MAX_IO_WIN; i++)
572 p_dev->resource[i] = &p_dev->function_config->io[i];
573 for (; i < (MAX_IO_WIN + MAX_WIN); i++)
574 p_dev->resource[i] = &p_dev->function_config->mem[i-MAX_IO_WIN];
575
576 mutex_unlock(&s->ops_mutex);
577
578 dev_printk(KERN_NOTICE, &p_dev->dev,
579 "pcmcia: registering new device %s (IRQ: %d)\n",
580 p_dev->devname, p_dev->irq);
581
582 pcmcia_device_query(p_dev);
583
584 if (device_register(&p_dev->dev))
585 goto err_unreg;
586
587 return p_dev;
588
589 err_unreg:
590 mutex_lock(&s->ops_mutex);
591 list_del(&p_dev->socket_device_list);
592 mutex_unlock(&s->ops_mutex);
593
594 err_free:
595 mutex_lock(&s->ops_mutex);
596 s->device_count--;
597 mutex_unlock(&s->ops_mutex);
598
599 for (i = 0; i < 4; i++)
600 kfree(p_dev->prod_id[i]);
601 kfree(p_dev->devname);
602 kfree(p_dev);
603 err_put:
604 pcmcia_put_socket(s);
605
606 return NULL;
607}
608
609
610static int pcmcia_card_add(struct pcmcia_socket *s)
611{
612 cistpl_longlink_mfc_t mfc;
613 unsigned int no_funcs, i, no_chains;
614 int ret = -EAGAIN;
615
616 mutex_lock(&s->ops_mutex);
617 if (!(s->resource_setup_done)) {
618 dev_dbg(&s->dev,
619 "no resources available, delaying card_add\n");
620 mutex_unlock(&s->ops_mutex);
621 return -EAGAIN; /* try again, but later... */
622 }
623
624 if (pcmcia_validate_mem(s)) {
625 dev_dbg(&s->dev, "validating mem resources failed, "
626 "delaying card_add\n");
627 mutex_unlock(&s->ops_mutex);
628 return -EAGAIN; /* try again, but later... */
629 }
630 mutex_unlock(&s->ops_mutex);
631
632 ret = pccard_validate_cis(s, &no_chains);
633 if (ret || !no_chains) {
634 dev_dbg(&s->dev, "invalid CIS or invalid resources\n");
635 return -ENODEV;
636 }
637
638 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
639 no_funcs = mfc.nfn;
640 else
641 no_funcs = 1;
642 s->functions = no_funcs;
643
644 for (i = 0; i < no_funcs; i++)
645 pcmcia_device_add(s, i);
646
647 return ret;
648}
649
650
651static int pcmcia_requery_callback(struct device *dev, void * _data)
652{
653 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
654 if (!p_dev->dev.driver) {
655 dev_dbg(dev, "update device information\n");
656 pcmcia_device_query(p_dev);
657 }
658
659 return 0;
660}
661
662
663static void pcmcia_requery(struct pcmcia_socket *s)
664{
665 int has_pfc;
666
667 if (s->functions == 0) {
668 pcmcia_card_add(s);
669 return;
670 }
671
672 /* some device information might have changed because of a CIS
673 * update or because we can finally read it correctly... so
674 * determine it again, overwriting old values if necessary. */
675 bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery_callback);
676
677 /* if the CIS changed, we need to check whether the number of
678 * functions changed. */
679 if (s->fake_cis) {
680 int old_funcs, new_funcs;
681 cistpl_longlink_mfc_t mfc;
682
683 /* does this cis override add or remove functions? */
684 old_funcs = s->functions;
685
686 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC,
687 &mfc))
688 new_funcs = mfc.nfn;
689 else
690 new_funcs = 1;
691 if (old_funcs != new_funcs) {
692 /* we need to re-start */
693 pcmcia_card_remove(s, NULL);
694 s->functions = 0;
695 pcmcia_card_add(s);
696 }
697 }
698
699 /* If the PCMCIA device consists of two pseudo devices,
700 * call pcmcia_device_add() -- which will fail if both
701 * devices are already registered. */
702 mutex_lock(&s->ops_mutex);
703 has_pfc = s->pcmcia_pfc;
704 mutex_unlock(&s->ops_mutex);
705 if (has_pfc)
706 pcmcia_device_add(s, 0);
707
708 /* we re-scan all devices, not just the ones connected to this
709 * socket. This does not matter, though. */
710 if (bus_rescan_devices(&pcmcia_bus_type))
711 dev_warn(&s->dev, "rescanning the bus failed\n");
712}
713
714
715#ifdef CONFIG_PCMCIA_LOAD_CIS
716
717/**
718 * pcmcia_load_firmware - load CIS from userspace if device-provided is broken
719 * @dev: the pcmcia device which needs a CIS override
720 * @filename: requested filename in /lib/firmware/
721 *
722 * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if
723 * the one provided by the card is broken. The firmware files reside in
724 * /lib/firmware/ in userspace.
725 */
726static int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
727{
728 struct pcmcia_socket *s = dev->socket;
729 const struct firmware *fw;
730 int ret = -ENOMEM;
731 cistpl_longlink_mfc_t mfc;
732 int old_funcs, new_funcs = 1;
733
734 if (!filename)
735 return -EINVAL;
736
737 dev_dbg(&dev->dev, "trying to load CIS file %s\n", filename);
738
739 if (request_firmware(&fw, filename, &dev->dev) == 0) {
740 if (fw->size >= CISTPL_MAX_CIS_SIZE) {
741 ret = -EINVAL;
742 dev_printk(KERN_ERR, &dev->dev,
743 "pcmcia: CIS override is too big\n");
744 goto release;
745 }
746
747 if (!pcmcia_replace_cis(s, fw->data, fw->size))
748 ret = 0;
749 else {
750 dev_printk(KERN_ERR, &dev->dev,
751 "pcmcia: CIS override failed\n");
752 goto release;
753 }
754
755 /* we need to re-start if the number of functions changed */
756 old_funcs = s->functions;
757 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC,
758 &mfc))
759 new_funcs = mfc.nfn;
760
761 if (old_funcs != new_funcs)
762 ret = -EBUSY;
763
764 /* update information */
765 pcmcia_device_query(dev);
766
767 /* requery (as number of functions might have changed) */
768 pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY);
769 }
770 release:
771 release_firmware(fw);
772
773 return ret;
774}
775
776#else /* !CONFIG_PCMCIA_LOAD_CIS */
777
778static inline int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
779{
780 return -ENODEV;
781}
782
783#endif
784
785
786static inline int pcmcia_devmatch(struct pcmcia_device *dev,
787 const struct pcmcia_device_id *did)
788{
789 if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
790 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
791 return 0;
792 }
793
794 if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
795 if ((!dev->has_card_id) || (dev->card_id != did->card_id))
796 return 0;
797 }
798
799 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
800 if (dev->func != did->function)
801 return 0;
802 }
803
804 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
805 if (!dev->prod_id[0])
806 return 0;
807 if (strcmp(did->prod_id[0], dev->prod_id[0]))
808 return 0;
809 }
810
811 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
812 if (!dev->prod_id[1])
813 return 0;
814 if (strcmp(did->prod_id[1], dev->prod_id[1]))
815 return 0;
816 }
817
818 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
819 if (!dev->prod_id[2])
820 return 0;
821 if (strcmp(did->prod_id[2], dev->prod_id[2]))
822 return 0;
823 }
824
825 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
826 if (!dev->prod_id[3])
827 return 0;
828 if (strcmp(did->prod_id[3], dev->prod_id[3]))
829 return 0;
830 }
831
832 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
833 dev_dbg(&dev->dev, "this is a pseudo-multi-function device\n");
834 mutex_lock(&dev->socket->ops_mutex);
835 dev->socket->pcmcia_pfc = 1;
836 mutex_unlock(&dev->socket->ops_mutex);
837 if (dev->device_no != did->device_no)
838 return 0;
839 }
840
841 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
842 int ret;
843
844 if ((!dev->has_func_id) || (dev->func_id != did->func_id))
845 return 0;
846
847 /* if this is a pseudo-multi-function device,
848 * we need explicit matches */
849 if (dev->socket->pcmcia_pfc)
850 return 0;
851 if (dev->device_no)
852 return 0;
853
854 /* also, FUNC_ID matching needs to be activated by userspace
855 * after it has re-checked that there is no possible module
856 * with a prod_id/manf_id/card_id match.
857 */
858 mutex_lock(&dev->socket->ops_mutex);
859 ret = dev->allow_func_id_match;
860 mutex_unlock(&dev->socket->ops_mutex);
861
862 if (!ret) {
863 dev_dbg(&dev->dev,
864 "skipping FUNC_ID match until userspace ACK\n");
865 return 0;
866 }
867 }
868
869 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
870 dev_dbg(&dev->dev, "device needs a fake CIS\n");
871 if (!dev->socket->fake_cis)
872 if (pcmcia_load_firmware(dev, did->cisfile))
873 return 0;
874 }
875
876 if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
877 int i;
878 for (i = 0; i < 4; i++)
879 if (dev->prod_id[i])
880 return 0;
881 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
882 return 0;
883 }
884
885 return 1;
886}
887
888
889static int pcmcia_bus_match(struct device *dev, struct device_driver *drv)
890{
891 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
892 struct pcmcia_driver *p_drv = to_pcmcia_drv(drv);
893 const struct pcmcia_device_id *did = p_drv->id_table;
894 struct pcmcia_dynid *dynid;
895
896 /* match dynamic devices first */
897 mutex_lock(&p_drv->dynids.lock);
898 list_for_each_entry(dynid, &p_drv->dynids.list, node) {
899 dev_dbg(dev, "trying to match to %s\n", drv->name);
900 if (pcmcia_devmatch(p_dev, &dynid->id)) {
901 dev_dbg(dev, "matched to %s\n", drv->name);
902 mutex_unlock(&p_drv->dynids.lock);
903 return 1;
904 }
905 }
906 mutex_unlock(&p_drv->dynids.lock);
907
908 while (did && did->match_flags) {
909 dev_dbg(dev, "trying to match to %s\n", drv->name);
910 if (pcmcia_devmatch(p_dev, did)) {
911 dev_dbg(dev, "matched to %s\n", drv->name);
912 return 1;
913 }
914 did++;
915 }
916
917 return 0;
918}
919
920#ifdef CONFIG_HOTPLUG
921
922static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
923{
924 struct pcmcia_device *p_dev;
925 int i;
926 u32 hash[4] = { 0, 0, 0, 0};
927
928 if (!dev)
929 return -ENODEV;
930
931 p_dev = to_pcmcia_dev(dev);
932
933 /* calculate hashes */
934 for (i = 0; i < 4; i++) {
935 if (!p_dev->prod_id[i])
936 continue;
937 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
938 }
939
940 if (add_uevent_var(env, "SOCKET_NO=%u", p_dev->socket->sock))
941 return -ENOMEM;
942
943 if (add_uevent_var(env, "DEVICE_NO=%02X", p_dev->device_no))
944 return -ENOMEM;
945
946 if (add_uevent_var(env, "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
947 "pa%08Xpb%08Xpc%08Xpd%08X",
948 p_dev->has_manf_id ? p_dev->manf_id : 0,
949 p_dev->has_card_id ? p_dev->card_id : 0,
950 p_dev->has_func_id ? p_dev->func_id : 0,
951 p_dev->func,
952 p_dev->device_no,
953 hash[0],
954 hash[1],
955 hash[2],
956 hash[3]))
957 return -ENOMEM;
958
959 return 0;
960}
961
962#else
963
964static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
965{
966 return -ENODEV;
967}
968
969#endif
970
971/************************ runtime PM support ***************************/
972
973static int pcmcia_dev_suspend(struct device *dev, pm_message_t state);
974static int pcmcia_dev_resume(struct device *dev);
975
976static int runtime_suspend(struct device *dev)
977{
978 int rc;
979
980 device_lock(dev);
981 rc = pcmcia_dev_suspend(dev, PMSG_SUSPEND);
982 device_unlock(dev);
983 return rc;
984}
985
986static int runtime_resume(struct device *dev)
987{
988 int rc;
989
990 device_lock(dev);
991 rc = pcmcia_dev_resume(dev);
992 device_unlock(dev);
993 return rc;
994}
995
996/************************ per-device sysfs output ***************************/
997
998#define pcmcia_device_attr(field, test, format) \
999static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf) \
1000{ \
1001 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
1002 return p_dev->test ? sprintf(buf, format, p_dev->field) : -ENODEV; \
1003}
1004
1005#define pcmcia_device_stringattr(name, field) \
1006static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf) \
1007{ \
1008 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
1009 return p_dev->field ? sprintf(buf, "%s\n", p_dev->field) : -ENODEV; \
1010}
1011
1012pcmcia_device_attr(func, socket, "0x%02x\n");
1013pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
1014pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
1015pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
1016pcmcia_device_stringattr(prod_id1, prod_id[0]);
1017pcmcia_device_stringattr(prod_id2, prod_id[1]);
1018pcmcia_device_stringattr(prod_id3, prod_id[2]);
1019pcmcia_device_stringattr(prod_id4, prod_id[3]);
1020
1021static ssize_t pcmcia_show_resources(struct device *dev,
1022 struct device_attribute *attr, char *buf)
1023{
1024 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1025 char *str = buf;
1026 int i;
1027
1028 for (i = 0; i < PCMCIA_NUM_RESOURCES; i++)
1029 str += sprintf(str, "%pr\n", p_dev->resource[i]);
1030
1031 return str - buf;
1032}
1033
1034static ssize_t pcmcia_show_pm_state(struct device *dev, struct device_attribute *attr, char *buf)
1035{
1036 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1037
1038 if (p_dev->suspended)
1039 return sprintf(buf, "off\n");
1040 else
1041 return sprintf(buf, "on\n");
1042}
1043
1044static ssize_t pcmcia_store_pm_state(struct device *dev, struct device_attribute *attr,
1045 const char *buf, size_t count)
1046{
1047 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1048 int ret = 0;
1049
1050 if (!count)
1051 return -EINVAL;
1052
1053 if ((!p_dev->suspended) && !strncmp(buf, "off", 3))
1054 ret = runtime_suspend(dev);
1055 else if (p_dev->suspended && !strncmp(buf, "on", 2))
1056 ret = runtime_resume(dev);
1057
1058 return ret ? ret : count;
1059}
1060
1061
1062static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1063{
1064 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1065 int i;
1066 u32 hash[4] = { 0, 0, 0, 0};
1067
1068 /* calculate hashes */
1069 for (i = 0; i < 4; i++) {
1070 if (!p_dev->prod_id[i])
1071 continue;
1072 hash[i] = crc32(0, p_dev->prod_id[i],
1073 strlen(p_dev->prod_id[i]));
1074 }
1075 return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
1076 "pa%08Xpb%08Xpc%08Xpd%08X\n",
1077 p_dev->has_manf_id ? p_dev->manf_id : 0,
1078 p_dev->has_card_id ? p_dev->card_id : 0,
1079 p_dev->has_func_id ? p_dev->func_id : 0,
1080 p_dev->func, p_dev->device_no,
1081 hash[0], hash[1], hash[2], hash[3]);
1082}
1083
1084static ssize_t pcmcia_store_allow_func_id_match(struct device *dev,
1085 struct device_attribute *attr, const char *buf, size_t count)
1086{
1087 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1088
1089 if (!count)
1090 return -EINVAL;
1091
1092 mutex_lock(&p_dev->socket->ops_mutex);
1093 p_dev->allow_func_id_match = 1;
1094 mutex_unlock(&p_dev->socket->ops_mutex);
1095 pcmcia_parse_uevents(p_dev->socket, PCMCIA_UEVENT_REQUERY);
1096
1097 return count;
1098}
1099
1100static struct device_attribute pcmcia_dev_attrs[] = {
1101 __ATTR(function, 0444, func_show, NULL),
1102 __ATTR(pm_state, 0644, pcmcia_show_pm_state, pcmcia_store_pm_state),
1103 __ATTR(resources, 0444, pcmcia_show_resources, NULL),
1104 __ATTR_RO(func_id),
1105 __ATTR_RO(manf_id),
1106 __ATTR_RO(card_id),
1107 __ATTR_RO(prod_id1),
1108 __ATTR_RO(prod_id2),
1109 __ATTR_RO(prod_id3),
1110 __ATTR_RO(prod_id4),
1111 __ATTR_RO(modalias),
1112 __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match),
1113 __ATTR_NULL,
1114};
1115
1116/* PM support, also needed for reset */
1117
1118static int pcmcia_dev_suspend(struct device *dev, pm_message_t state)
1119{
1120 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1121 struct pcmcia_driver *p_drv = NULL;
1122 int ret = 0;
1123
1124 mutex_lock(&p_dev->socket->ops_mutex);
1125 if (p_dev->suspended) {
1126 mutex_unlock(&p_dev->socket->ops_mutex);
1127 return 0;
1128 }
1129 p_dev->suspended = 1;
1130 mutex_unlock(&p_dev->socket->ops_mutex);
1131
1132 dev_dbg(dev, "suspending\n");
1133
1134 if (dev->driver)
1135 p_drv = to_pcmcia_drv(dev->driver);
1136
1137 if (!p_drv)
1138 goto out;
1139
1140 if (p_drv->suspend) {
1141 ret = p_drv->suspend(p_dev);
1142 if (ret) {
1143 dev_printk(KERN_ERR, dev,
1144 "pcmcia: device %s (driver %s) did "
1145 "not want to go to sleep (%d)\n",
1146 p_dev->devname, p_drv->name, ret);
1147 mutex_lock(&p_dev->socket->ops_mutex);
1148 p_dev->suspended = 0;
1149 mutex_unlock(&p_dev->socket->ops_mutex);
1150 goto out;
1151 }
1152 }
1153
1154 if (p_dev->device_no == p_dev->func) {
1155 dev_dbg(dev, "releasing configuration\n");
1156 pcmcia_release_configuration(p_dev);
1157 }
1158
1159 out:
1160 return ret;
1161}
1162
1163
1164static int pcmcia_dev_resume(struct device *dev)
1165{
1166 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1167 struct pcmcia_driver *p_drv = NULL;
1168 int ret = 0;
1169
1170 mutex_lock(&p_dev->socket->ops_mutex);
1171 if (!p_dev->suspended) {
1172 mutex_unlock(&p_dev->socket->ops_mutex);
1173 return 0;
1174 }
1175 p_dev->suspended = 0;
1176 mutex_unlock(&p_dev->socket->ops_mutex);
1177
1178 dev_dbg(dev, "resuming\n");
1179
1180 if (dev->driver)
1181 p_drv = to_pcmcia_drv(dev->driver);
1182
1183 if (!p_drv)
1184 goto out;
1185
1186 if (p_dev->device_no == p_dev->func) {
1187 dev_dbg(dev, "requesting configuration\n");
1188 ret = pcmcia_enable_device(p_dev);
1189 if (ret)
1190 goto out;
1191 }
1192
1193 if (p_drv->resume)
1194 ret = p_drv->resume(p_dev);
1195
1196 out:
1197 return ret;
1198}
1199
1200
1201static int pcmcia_bus_suspend_callback(struct device *dev, void * _data)
1202{
1203 struct pcmcia_socket *skt = _data;
1204 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1205
1206 if (p_dev->socket != skt || p_dev->suspended)
1207 return 0;
1208
1209 return runtime_suspend(dev);
1210}
1211
1212static int pcmcia_bus_resume_callback(struct device *dev, void * _data)
1213{
1214 struct pcmcia_socket *skt = _data;
1215 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1216
1217 if (p_dev->socket != skt || !p_dev->suspended)
1218 return 0;
1219
1220 runtime_resume(dev);
1221
1222 return 0;
1223}
1224
1225static int pcmcia_bus_resume(struct pcmcia_socket *skt)
1226{
1227 dev_dbg(&skt->dev, "resuming socket %d\n", skt->sock);
1228 bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback);
1229 return 0;
1230}
1231
1232static int pcmcia_bus_suspend(struct pcmcia_socket *skt)
1233{
1234 dev_dbg(&skt->dev, "suspending socket %d\n", skt->sock);
1235 if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt,
1236 pcmcia_bus_suspend_callback)) {
1237 pcmcia_bus_resume(skt);
1238 return -EIO;
1239 }
1240 return 0;
1241}
1242
1243static int pcmcia_bus_remove(struct pcmcia_socket *skt)
1244{
1245 atomic_set(&skt->present, 0);
1246 pcmcia_card_remove(skt, NULL);
1247
1248 mutex_lock(&skt->ops_mutex);
1249 destroy_cis_cache(skt);
1250 pcmcia_cleanup_irq(skt);
1251 mutex_unlock(&skt->ops_mutex);
1252
1253 return 0;
1254}
1255
1256static int pcmcia_bus_add(struct pcmcia_socket *skt)
1257{
1258 atomic_set(&skt->present, 1);
1259
1260 mutex_lock(&skt->ops_mutex);
1261 skt->pcmcia_pfc = 0;
1262 destroy_cis_cache(skt); /* to be on the safe side... */
1263 mutex_unlock(&skt->ops_mutex);
1264
1265 pcmcia_card_add(skt);
1266
1267 return 0;
1268}
1269
1270static int pcmcia_bus_early_resume(struct pcmcia_socket *skt)
1271{
1272 if (!verify_cis_cache(skt)) {
1273 pcmcia_put_socket(skt);
1274 return 0;
1275 }
1276
1277 dev_dbg(&skt->dev, "cis mismatch - different card\n");
1278
1279 /* first, remove the card */
1280 pcmcia_bus_remove(skt);
1281
1282 mutex_lock(&skt->ops_mutex);
1283 destroy_cis_cache(skt);
1284 kfree(skt->fake_cis);
1285 skt->fake_cis = NULL;
1286 skt->functions = 0;
1287 mutex_unlock(&skt->ops_mutex);
1288
1289 /* now, add the new card */
1290 pcmcia_bus_add(skt);
1291 return 0;
1292}
1293
1294
1295/*
1296 * NOTE: This is racy. There's no guarantee the card will still be
1297 * physically present, even if the call to this function returns
1298 * non-NULL. Furthermore, the device driver most likely is unbound
1299 * almost immediately, so the timeframe where pcmcia_dev_present
1300 * returns NULL is probably really really small.
1301 */
1302struct pcmcia_device *pcmcia_dev_present(struct pcmcia_device *_p_dev)
1303{
1304 struct pcmcia_device *p_dev;
1305 struct pcmcia_device *ret = NULL;
1306
1307 p_dev = pcmcia_get_dev(_p_dev);
1308 if (!p_dev)
1309 return NULL;
1310
1311 if (atomic_read(&p_dev->socket->present) != 0)
1312 ret = p_dev;
1313
1314 pcmcia_put_dev(p_dev);
1315 return ret;
1316}
1317EXPORT_SYMBOL(pcmcia_dev_present);
1318
1319
1320static struct pcmcia_callback pcmcia_bus_callback = {
1321 .owner = THIS_MODULE,
1322 .add = pcmcia_bus_add,
1323 .remove = pcmcia_bus_remove,
1324 .requery = pcmcia_requery,
1325 .validate = pccard_validate_cis,
1326 .suspend = pcmcia_bus_suspend,
1327 .early_resume = pcmcia_bus_early_resume,
1328 .resume = pcmcia_bus_resume,
1329};
1330
1331static int __devinit pcmcia_bus_add_socket(struct device *dev,
1332 struct class_interface *class_intf)
1333{
1334 struct pcmcia_socket *socket = dev_get_drvdata(dev);
1335 int ret;
1336
1337 socket = pcmcia_get_socket(socket);
1338 if (!socket) {
1339 dev_printk(KERN_ERR, dev,
1340 "PCMCIA obtaining reference to socket failed\n");
1341 return -ENODEV;
1342 }
1343
1344 ret = sysfs_create_bin_file(&dev->kobj, &pccard_cis_attr);
1345 if (ret) {
1346 dev_printk(KERN_ERR, dev, "PCMCIA registration failed\n");
1347 pcmcia_put_socket(socket);
1348 return ret;
1349 }
1350
1351 INIT_LIST_HEAD(&socket->devices_list);
1352 socket->pcmcia_pfc = 0;
1353 socket->device_count = 0;
1354 atomic_set(&socket->present, 0);
1355
1356 ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback);
1357 if (ret) {
1358 dev_printk(KERN_ERR, dev, "PCMCIA registration failed\n");
1359 pcmcia_put_socket(socket);
1360 return ret;
1361 }
1362
1363 return 0;
1364}
1365
1366static void pcmcia_bus_remove_socket(struct device *dev,
1367 struct class_interface *class_intf)
1368{
1369 struct pcmcia_socket *socket = dev_get_drvdata(dev);
1370
1371 if (!socket)
1372 return;
1373
1374 pccard_register_pcmcia(socket, NULL);
1375
1376 /* unregister any unbound devices */
1377 mutex_lock(&socket->skt_mutex);
1378 pcmcia_card_remove(socket, NULL);
1379 release_cis_mem(socket);
1380 mutex_unlock(&socket->skt_mutex);
1381
1382 sysfs_remove_bin_file(&dev->kobj, &pccard_cis_attr);
1383
1384 pcmcia_put_socket(socket);
1385
1386 return;
1387}
1388
1389
1390/* the pcmcia_bus_interface is used to handle pcmcia socket devices */
1391static struct class_interface pcmcia_bus_interface __refdata = {
1392 .class = &pcmcia_socket_class,
1393 .add_dev = &pcmcia_bus_add_socket,
1394 .remove_dev = &pcmcia_bus_remove_socket,
1395};
1396
1397
1398struct bus_type pcmcia_bus_type = {
1399 .name = "pcmcia",
1400 .uevent = pcmcia_bus_uevent,
1401 .match = pcmcia_bus_match,
1402 .dev_attrs = pcmcia_dev_attrs,
1403 .probe = pcmcia_device_probe,
1404 .remove = pcmcia_device_remove,
1405 .suspend = pcmcia_dev_suspend,
1406 .resume = pcmcia_dev_resume,
1407};
1408
1409
1410static int __init init_pcmcia_bus(void)
1411{
1412 int ret;
1413
1414 ret = bus_register(&pcmcia_bus_type);
1415 if (ret < 0) {
1416 printk(KERN_WARNING "pcmcia: bus_register error: %d\n", ret);
1417 return ret;
1418 }
1419 ret = class_interface_register(&pcmcia_bus_interface);
1420 if (ret < 0) {
1421 printk(KERN_WARNING
1422 "pcmcia: class_interface_register error: %d\n", ret);
1423 bus_unregister(&pcmcia_bus_type);
1424 return ret;
1425 }
1426
1427 return 0;
1428}
1429fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that
1430 * pcmcia_socket_class is already registered */
1431
1432
1433static void __exit exit_pcmcia_bus(void)
1434{
1435 class_interface_unregister(&pcmcia_bus_interface);
1436
1437 bus_unregister(&pcmcia_bus_type);
1438}
1439module_exit(exit_pcmcia_bus);
1440
1441
1442MODULE_ALIAS("ds");
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");