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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/*
2 * ds.c -- 16-bit PCMCIA core support
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
7 *
8 * The initial developer of the original code is David A. Hinds
9 * <dahinds@users.sourceforge.net>. Portions created by David A. Hinds
10 * are Copyright (C) 1999 David A. Hinds. All Rights Reserved.
11 *
12 * (C) 1999 David A. Hinds
13 * (C) 2003 - 2010 Dominik Brodowski
14 */
15
16#include <linux/kernel.h>
17#include <linux/module.h>
18#include <linux/init.h>
19#include <linux/errno.h>
20#include <linux/list.h>
21#include <linux/delay.h>
22#include <linux/workqueue.h>
23#include <linux/crc32.h>
24#include <linux/firmware.h>
25#include <linux/kref.h>
26#include <linux/dma-mapping.h>
27#include <linux/slab.h>
28
29#include <pcmcia/cistpl.h>
30#include <pcmcia/ds.h>
31#include <pcmcia/ss.h>
32
33#include "cs_internal.h"
34
35/*====================================================================*/
36
37/* Module parameters */
38
39MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
40MODULE_DESCRIPTION("PCMCIA Driver Services");
41MODULE_LICENSE("GPL");
42
43
44/*====================================================================*/
45
46static void pcmcia_check_driver(struct pcmcia_driver *p_drv)
47{
48 const struct pcmcia_device_id *did = p_drv->id_table;
49 unsigned int i;
50 u32 hash;
51
52 if (!p_drv->probe || !p_drv->remove)
53 printk(KERN_DEBUG "pcmcia: %s lacks a requisite callback "
54 "function\n", p_drv->name);
55
56 while (did && did->match_flags) {
57 for (i = 0; i < 4; i++) {
58 if (!did->prod_id[i])
59 continue;
60
61 hash = crc32(0, did->prod_id[i], strlen(did->prod_id[i]));
62 if (hash == did->prod_id_hash[i])
63 continue;
64
65 printk(KERN_DEBUG "pcmcia: %s: invalid hash for "
66 "product string \"%s\": is 0x%x, should "
67 "be 0x%x\n", p_drv->name, did->prod_id[i],
68 did->prod_id_hash[i], hash);
69 printk(KERN_DEBUG "pcmcia: see "
70 "Documentation/pcmcia/devicetable.txt for "
71 "details\n");
72 }
73 did++;
74 }
75
76 return;
77}
78
79
80/*======================================================================*/
81
82
83struct pcmcia_dynid {
84 struct list_head node;
85 struct pcmcia_device_id id;
86};
87
88/**
89 * pcmcia_store_new_id - add a new PCMCIA device ID to this driver and re-probe devices
90 * @driver: target device driver
91 * @buf: buffer for scanning device ID data
92 * @count: input size
93 *
94 * Adds a new dynamic PCMCIA device ID to this driver,
95 * and causes the driver to probe for all devices again.
96 */
97static ssize_t
98pcmcia_store_new_id(struct device_driver *driver, const char *buf, size_t count)
99{
100 struct pcmcia_dynid *dynid;
101 struct pcmcia_driver *pdrv = to_pcmcia_drv(driver);
102 __u16 match_flags, manf_id, card_id;
103 __u8 func_id, function, device_no;
104 __u32 prod_id_hash[4] = {0, 0, 0, 0};
105 int fields = 0;
106 int retval = 0;
107
108 fields = sscanf(buf, "%hx %hx %hx %hhx %hhx %hhx %x %x %x %x",
109 &match_flags, &manf_id, &card_id, &func_id, &function, &device_no,
110 &prod_id_hash[0], &prod_id_hash[1], &prod_id_hash[2], &prod_id_hash[3]);
111 if (fields < 6)
112 return -EINVAL;
113
114 dynid = kzalloc(sizeof(struct pcmcia_dynid), GFP_KERNEL);
115 if (!dynid)
116 return -ENOMEM;
117
118 dynid->id.match_flags = match_flags;
119 dynid->id.manf_id = manf_id;
120 dynid->id.card_id = card_id;
121 dynid->id.func_id = func_id;
122 dynid->id.function = function;
123 dynid->id.device_no = device_no;
124 memcpy(dynid->id.prod_id_hash, prod_id_hash, sizeof(__u32) * 4);
125
126 mutex_lock(&pdrv->dynids.lock);
127 list_add_tail(&dynid->node, &pdrv->dynids.list);
128 mutex_unlock(&pdrv->dynids.lock);
129
130 retval = driver_attach(&pdrv->drv);
131
132 if (retval)
133 return retval;
134 return count;
135}
136static DRIVER_ATTR(new_id, S_IWUSR, NULL, pcmcia_store_new_id);
137
138static void
139pcmcia_free_dynids(struct pcmcia_driver *drv)
140{
141 struct pcmcia_dynid *dynid, *n;
142
143 mutex_lock(&drv->dynids.lock);
144 list_for_each_entry_safe(dynid, n, &drv->dynids.list, node) {
145 list_del(&dynid->node);
146 kfree(dynid);
147 }
148 mutex_unlock(&drv->dynids.lock);
149}
150
151static int
152pcmcia_create_newid_file(struct pcmcia_driver *drv)
153{
154 int error = 0;
155 if (drv->probe != NULL)
156 error = driver_create_file(&drv->drv, &driver_attr_new_id);
157 return error;
158}
159
160static void
161pcmcia_remove_newid_file(struct pcmcia_driver *drv)
162{
163 driver_remove_file(&drv->drv, &driver_attr_new_id);
164}
165
166/**
167 * pcmcia_register_driver - register a PCMCIA driver with the bus core
168 * @driver: the &driver being registered
169 *
170 * Registers a PCMCIA driver with the PCMCIA bus core.
171 */
172int pcmcia_register_driver(struct pcmcia_driver *driver)
173{
174 int error;
175
176 if (!driver)
177 return -EINVAL;
178
179 pcmcia_check_driver(driver);
180
181 /* initialize common fields */
182 driver->drv.bus = &pcmcia_bus_type;
183 driver->drv.owner = driver->owner;
184 driver->drv.name = driver->name;
185 mutex_init(&driver->dynids.lock);
186 INIT_LIST_HEAD(&driver->dynids.list);
187
188 pr_debug("registering driver %s\n", driver->name);
189
190 error = driver_register(&driver->drv);
191 if (error < 0)
192 return error;
193
194 error = pcmcia_create_newid_file(driver);
195 if (error)
196 driver_unregister(&driver->drv);
197
198 return error;
199}
200EXPORT_SYMBOL(pcmcia_register_driver);
201
202/**
203 * pcmcia_unregister_driver - unregister a PCMCIA driver with the bus core
204 * @driver: the &driver being unregistered
205 */
206void pcmcia_unregister_driver(struct pcmcia_driver *driver)
207{
208 pr_debug("unregistering driver %s\n", driver->name);
209 pcmcia_remove_newid_file(driver);
210 driver_unregister(&driver->drv);
211 pcmcia_free_dynids(driver);
212}
213EXPORT_SYMBOL(pcmcia_unregister_driver);
214
215
216/* pcmcia_device handling */
217
218static struct pcmcia_device *pcmcia_get_dev(struct pcmcia_device *p_dev)
219{
220 struct device *tmp_dev;
221 tmp_dev = get_device(&p_dev->dev);
222 if (!tmp_dev)
223 return NULL;
224 return to_pcmcia_dev(tmp_dev);
225}
226
227static void pcmcia_put_dev(struct pcmcia_device *p_dev)
228{
229 if (p_dev)
230 put_device(&p_dev->dev);
231}
232
233static void pcmcia_release_function(struct kref *ref)
234{
235 struct config_t *c = container_of(ref, struct config_t, ref);
236 pr_debug("releasing config_t\n");
237 kfree(c);
238}
239
240static void pcmcia_release_dev(struct device *dev)
241{
242 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
243 int i;
244 dev_dbg(dev, "releasing device\n");
245 pcmcia_put_socket(p_dev->socket);
246 for (i = 0; i < 4; i++)
247 kfree(p_dev->prod_id[i]);
248 kfree(p_dev->devname);
249 kref_put(&p_dev->function_config->ref, pcmcia_release_function);
250 kfree(p_dev);
251}
252
253
254static int pcmcia_device_probe(struct device *dev)
255{
256 struct pcmcia_device *p_dev;
257 struct pcmcia_driver *p_drv;
258 struct pcmcia_socket *s;
259 cistpl_config_t cis_config;
260 int ret = 0;
261
262 dev = get_device(dev);
263 if (!dev)
264 return -ENODEV;
265
266 p_dev = to_pcmcia_dev(dev);
267 p_drv = to_pcmcia_drv(dev->driver);
268 s = p_dev->socket;
269
270 dev_dbg(dev, "trying to bind to %s\n", p_drv->name);
271
272 if ((!p_drv->probe) || (!p_dev->function_config) ||
273 (!try_module_get(p_drv->owner))) {
274 ret = -EINVAL;
275 goto put_dev;
276 }
277
278 /* set up some more device information */
279 ret = pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_CONFIG,
280 &cis_config);
281 if (!ret) {
282 p_dev->config_base = cis_config.base;
283 p_dev->config_regs = cis_config.rmask[0];
284 dev_dbg(dev, "base %x, regs %x", p_dev->config_base,
285 p_dev->config_regs);
286 } else {
287 dev_info(dev,
288 "pcmcia: could not parse base and rmask0 of CIS\n");
289 p_dev->config_base = 0;
290 p_dev->config_regs = 0;
291 }
292
293 ret = p_drv->probe(p_dev);
294 if (ret) {
295 dev_dbg(dev, "binding to %s failed with %d\n",
296 p_drv->name, ret);
297 goto put_module;
298 }
299 dev_dbg(dev, "%s bound: Vpp %d.%d, idx %x, IRQ %d", p_drv->name,
300 p_dev->vpp/10, p_dev->vpp%10, p_dev->config_index, p_dev->irq);
301 dev_dbg(dev, "resources: ioport %pR %pR iomem %pR %pR %pR",
302 p_dev->resource[0], p_dev->resource[1], p_dev->resource[2],
303 p_dev->resource[3], p_dev->resource[4]);
304
305 mutex_lock(&s->ops_mutex);
306 if ((s->pcmcia_pfc) &&
307 (p_dev->socket->device_count == 1) && (p_dev->device_no == 0))
308 pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY);
309 mutex_unlock(&s->ops_mutex);
310
311put_module:
312 if (ret)
313 module_put(p_drv->owner);
314put_dev:
315 if (ret)
316 put_device(dev);
317 return ret;
318}
319
320
321/*
322 * Removes a PCMCIA card from the device tree and socket list.
323 */
324static void pcmcia_card_remove(struct pcmcia_socket *s, struct pcmcia_device *leftover)
325{
326 struct pcmcia_device *p_dev;
327 struct pcmcia_device *tmp;
328
329 dev_dbg(leftover ? &leftover->dev : &s->dev,
330 "pcmcia_card_remove(%d) %s\n", s->sock,
331 leftover ? leftover->devname : "");
332
333 mutex_lock(&s->ops_mutex);
334 if (!leftover)
335 s->device_count = 0;
336 else
337 s->device_count = 1;
338 mutex_unlock(&s->ops_mutex);
339
340 /* unregister all pcmcia_devices registered with this socket, except leftover */
341 list_for_each_entry_safe(p_dev, tmp, &s->devices_list, socket_device_list) {
342 if (p_dev == leftover)
343 continue;
344
345 mutex_lock(&s->ops_mutex);
346 list_del(&p_dev->socket_device_list);
347 mutex_unlock(&s->ops_mutex);
348
349 dev_dbg(&p_dev->dev, "unregistering device\n");
350 device_unregister(&p_dev->dev);
351 }
352
353 return;
354}
355
356static int pcmcia_device_remove(struct device *dev)
357{
358 struct pcmcia_device *p_dev;
359 struct pcmcia_driver *p_drv;
360 int i;
361
362 p_dev = to_pcmcia_dev(dev);
363 p_drv = to_pcmcia_drv(dev->driver);
364
365 dev_dbg(dev, "removing device\n");
366
367 /* If we're removing the primary module driving a
368 * pseudo multi-function card, we need to unbind
369 * all devices
370 */
371 if ((p_dev->socket->pcmcia_pfc) &&
372 (p_dev->socket->device_count > 0) &&
373 (p_dev->device_no == 0))
374 pcmcia_card_remove(p_dev->socket, p_dev);
375
376 /* detach the "instance" */
377 if (!p_drv)
378 return 0;
379
380 if (p_drv->remove)
381 p_drv->remove(p_dev);
382
383 /* check for proper unloading */
384 if (p_dev->_irq || p_dev->_io || p_dev->_locked)
385 dev_info(dev,
386 "pcmcia: driver %s did not release config properly\n",
387 p_drv->name);
388
389 for (i = 0; i < MAX_WIN; i++)
390 if (p_dev->_win & CLIENT_WIN_REQ(i))
391 dev_info(dev,
392 "pcmcia: driver %s did not release window properly\n",
393 p_drv->name);
394
395 /* references from pcmcia_probe_device */
396 pcmcia_put_dev(p_dev);
397 module_put(p_drv->owner);
398
399 return 0;
400}
401
402
403/*
404 * pcmcia_device_query -- determine information about a pcmcia device
405 */
406static int pcmcia_device_query(struct pcmcia_device *p_dev)
407{
408 cistpl_manfid_t manf_id;
409 cistpl_funcid_t func_id;
410 cistpl_vers_1_t *vers1;
411 unsigned int i;
412
413 vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL);
414 if (!vers1)
415 return -ENOMEM;
416
417 if (!pccard_read_tuple(p_dev->socket, BIND_FN_ALL,
418 CISTPL_MANFID, &manf_id)) {
419 mutex_lock(&p_dev->socket->ops_mutex);
420 p_dev->manf_id = manf_id.manf;
421 p_dev->card_id = manf_id.card;
422 p_dev->has_manf_id = 1;
423 p_dev->has_card_id = 1;
424 mutex_unlock(&p_dev->socket->ops_mutex);
425 }
426
427 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
428 CISTPL_FUNCID, &func_id)) {
429 mutex_lock(&p_dev->socket->ops_mutex);
430 p_dev->func_id = func_id.func;
431 p_dev->has_func_id = 1;
432 mutex_unlock(&p_dev->socket->ops_mutex);
433 } else {
434 /* rule of thumb: cards with no FUNCID, but with
435 * common memory device geometry information, are
436 * probably memory cards (from pcmcia-cs) */
437 cistpl_device_geo_t *devgeo;
438
439 devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL);
440 if (!devgeo) {
441 kfree(vers1);
442 return -ENOMEM;
443 }
444 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
445 CISTPL_DEVICE_GEO, devgeo)) {
446 dev_dbg(&p_dev->dev,
447 "mem device geometry probably means "
448 "FUNCID_MEMORY\n");
449 mutex_lock(&p_dev->socket->ops_mutex);
450 p_dev->func_id = CISTPL_FUNCID_MEMORY;
451 p_dev->has_func_id = 1;
452 mutex_unlock(&p_dev->socket->ops_mutex);
453 }
454 kfree(devgeo);
455 }
456
457 if (!pccard_read_tuple(p_dev->socket, BIND_FN_ALL, CISTPL_VERS_1,
458 vers1)) {
459 mutex_lock(&p_dev->socket->ops_mutex);
460 for (i = 0; i < min_t(unsigned int, 4, vers1->ns); i++) {
461 char *tmp;
462 unsigned int length;
463 char *new;
464
465 tmp = vers1->str + vers1->ofs[i];
466
467 length = strlen(tmp) + 1;
468 if ((length < 2) || (length > 255))
469 continue;
470
471 new = kstrdup(tmp, GFP_KERNEL);
472 if (!new)
473 continue;
474
475 tmp = p_dev->prod_id[i];
476 p_dev->prod_id[i] = new;
477 kfree(tmp);
478 }
479 mutex_unlock(&p_dev->socket->ops_mutex);
480 }
481
482 kfree(vers1);
483 return 0;
484}
485
486
487static struct pcmcia_device *pcmcia_device_add(struct pcmcia_socket *s,
488 unsigned int function)
489{
490 struct pcmcia_device *p_dev, *tmp_dev;
491 int i;
492
493 s = pcmcia_get_socket(s);
494 if (!s)
495 return NULL;
496
497 pr_debug("adding device to %d, function %d\n", s->sock, function);
498
499 p_dev = kzalloc(sizeof(struct pcmcia_device), GFP_KERNEL);
500 if (!p_dev)
501 goto err_put;
502
503 mutex_lock(&s->ops_mutex);
504 p_dev->device_no = (s->device_count++);
505 mutex_unlock(&s->ops_mutex);
506
507 /* max of 2 PFC devices */
508 if ((p_dev->device_no >= 2) && (function == 0))
509 goto err_free;
510
511 /* max of 4 devices overall */
512 if (p_dev->device_no >= 4)
513 goto err_free;
514
515 p_dev->socket = s;
516 p_dev->func = function;
517
518 p_dev->dev.bus = &pcmcia_bus_type;
519 p_dev->dev.parent = s->dev.parent;
520 p_dev->dev.release = pcmcia_release_dev;
521 /* by default don't allow DMA */
522 p_dev->dma_mask = DMA_MASK_NONE;
523 p_dev->dev.dma_mask = &p_dev->dma_mask;
524 dev_set_name(&p_dev->dev, "%d.%d", p_dev->socket->sock, p_dev->device_no);
525 if (!dev_name(&p_dev->dev))
526 goto err_free;
527 p_dev->devname = kasprintf(GFP_KERNEL, "pcmcia%s", dev_name(&p_dev->dev));
528 if (!p_dev->devname)
529 goto err_free;
530 dev_dbg(&p_dev->dev, "devname is %s\n", p_dev->devname);
531
532 mutex_lock(&s->ops_mutex);
533
534 /*
535 * p_dev->function_config must be the same for all card functions.
536 * Note that this is serialized by ops_mutex, so that only one
537 * such struct will be created.
538 */
539 list_for_each_entry(tmp_dev, &s->devices_list, socket_device_list)
540 if (p_dev->func == tmp_dev->func) {
541 p_dev->function_config = tmp_dev->function_config;
542 p_dev->irq = tmp_dev->irq;
543 kref_get(&p_dev->function_config->ref);
544 }
545
546 /* Add to the list in pcmcia_bus_socket */
547 list_add(&p_dev->socket_device_list, &s->devices_list);
548
549 if (pcmcia_setup_irq(p_dev))
550 dev_warn(&p_dev->dev,
551 "IRQ setup failed -- device might not work\n");
552
553 if (!p_dev->function_config) {
554 config_t *c;
555 dev_dbg(&p_dev->dev, "creating config_t\n");
556 c = kzalloc(sizeof(struct config_t), GFP_KERNEL);
557 if (!c) {
558 mutex_unlock(&s->ops_mutex);
559 goto err_unreg;
560 }
561 p_dev->function_config = c;
562 kref_init(&c->ref);
563 for (i = 0; i < MAX_IO_WIN; i++) {
564 c->io[i].name = p_dev->devname;
565 c->io[i].flags = IORESOURCE_IO;
566 }
567 for (i = 0; i < MAX_WIN; i++) {
568 c->mem[i].name = p_dev->devname;
569 c->mem[i].flags = IORESOURCE_MEM;
570 }
571 }
572 for (i = 0; i < MAX_IO_WIN; i++)
573 p_dev->resource[i] = &p_dev->function_config->io[i];
574 for (; i < (MAX_IO_WIN + MAX_WIN); i++)
575 p_dev->resource[i] = &p_dev->function_config->mem[i-MAX_IO_WIN];
576
577 mutex_unlock(&s->ops_mutex);
578
579 dev_notice(&p_dev->dev, "pcmcia: registering new device %s (IRQ: %d)\n",
580 p_dev->devname, p_dev->irq);
581
582 pcmcia_device_query(p_dev);
583
584 if (device_register(&p_dev->dev))
585 goto err_unreg;
586
587 return p_dev;
588
589 err_unreg:
590 mutex_lock(&s->ops_mutex);
591 list_del(&p_dev->socket_device_list);
592 mutex_unlock(&s->ops_mutex);
593
594 err_free:
595 mutex_lock(&s->ops_mutex);
596 s->device_count--;
597 mutex_unlock(&s->ops_mutex);
598
599 for (i = 0; i < 4; i++)
600 kfree(p_dev->prod_id[i]);
601 kfree(p_dev->devname);
602 kfree(p_dev);
603 err_put:
604 pcmcia_put_socket(s);
605
606 return NULL;
607}
608
609
610static int pcmcia_card_add(struct pcmcia_socket *s)
611{
612 cistpl_longlink_mfc_t mfc;
613 unsigned int no_funcs, i, no_chains;
614 int ret = -EAGAIN;
615
616 mutex_lock(&s->ops_mutex);
617 if (!(s->resource_setup_done)) {
618 dev_dbg(&s->dev,
619 "no resources available, delaying card_add\n");
620 mutex_unlock(&s->ops_mutex);
621 return -EAGAIN; /* try again, but later... */
622 }
623
624 if (pcmcia_validate_mem(s)) {
625 dev_dbg(&s->dev, "validating mem resources failed, "
626 "delaying card_add\n");
627 mutex_unlock(&s->ops_mutex);
628 return -EAGAIN; /* try again, but later... */
629 }
630 mutex_unlock(&s->ops_mutex);
631
632 ret = pccard_validate_cis(s, &no_chains);
633 if (ret || !no_chains) {
634#if defined(CONFIG_MTD_PCMCIA_ANONYMOUS)
635 /* Set up as an anonymous card. If we don't have anonymous
636 memory support then just error the card as there is no
637 point trying to second guess.
638
639 Note: some cards have just a device entry, it may be
640 worth extending support to cover these in future */
641 if (ret == -EIO) {
642 dev_info(&s->dev, "no CIS, assuming an anonymous memory card.\n");
643 pcmcia_replace_cis(s, "\xFF", 1);
644 no_chains = 1;
645 ret = 0;
646 } else
647#endif
648 {
649 dev_dbg(&s->dev, "invalid CIS or invalid resources\n");
650 return -ENODEV;
651 }
652 }
653
654 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
655 no_funcs = mfc.nfn;
656 else
657 no_funcs = 1;
658 s->functions = no_funcs;
659
660 for (i = 0; i < no_funcs; i++)
661 pcmcia_device_add(s, i);
662
663 return ret;
664}
665
666
667static int pcmcia_requery_callback(struct device *dev, void *_data)
668{
669 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
670 if (!p_dev->dev.driver) {
671 dev_dbg(dev, "update device information\n");
672 pcmcia_device_query(p_dev);
673 }
674
675 return 0;
676}
677
678
679static void pcmcia_requery(struct pcmcia_socket *s)
680{
681 int has_pfc;
682
683 if (!(s->state & SOCKET_PRESENT))
684 return;
685
686 if (s->functions == 0) {
687 pcmcia_card_add(s);
688 return;
689 }
690
691 /* some device information might have changed because of a CIS
692 * update or because we can finally read it correctly... so
693 * determine it again, overwriting old values if necessary. */
694 bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery_callback);
695
696 /* if the CIS changed, we need to check whether the number of
697 * functions changed. */
698 if (s->fake_cis) {
699 int old_funcs, new_funcs;
700 cistpl_longlink_mfc_t mfc;
701
702 /* does this cis override add or remove functions? */
703 old_funcs = s->functions;
704
705 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC,
706 &mfc))
707 new_funcs = mfc.nfn;
708 else
709 new_funcs = 1;
710 if (old_funcs != new_funcs) {
711 /* we need to re-start */
712 pcmcia_card_remove(s, NULL);
713 s->functions = 0;
714 pcmcia_card_add(s);
715 }
716 }
717
718 /* If the PCMCIA device consists of two pseudo devices,
719 * call pcmcia_device_add() -- which will fail if both
720 * devices are already registered. */
721 mutex_lock(&s->ops_mutex);
722 has_pfc = s->pcmcia_pfc;
723 mutex_unlock(&s->ops_mutex);
724 if (has_pfc)
725 pcmcia_device_add(s, 0);
726
727 /* we re-scan all devices, not just the ones connected to this
728 * socket. This does not matter, though. */
729 if (bus_rescan_devices(&pcmcia_bus_type))
730 dev_warn(&s->dev, "rescanning the bus failed\n");
731}
732
733
734#ifdef CONFIG_PCMCIA_LOAD_CIS
735
736/**
737 * pcmcia_load_firmware - load CIS from userspace if device-provided is broken
738 * @dev: the pcmcia device which needs a CIS override
739 * @filename: requested filename in /lib/firmware/
740 *
741 * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if
742 * the one provided by the card is broken. The firmware files reside in
743 * /lib/firmware/ in userspace.
744 */
745static int pcmcia_load_firmware(struct pcmcia_device *dev, char *filename)
746{
747 struct pcmcia_socket *s = dev->socket;
748 const struct firmware *fw;
749 int ret = -ENOMEM;
750 cistpl_longlink_mfc_t mfc;
751 int old_funcs, new_funcs = 1;
752
753 if (!filename)
754 return -EINVAL;
755
756 dev_dbg(&dev->dev, "trying to load CIS file %s\n", filename);
757
758 if (request_firmware(&fw, filename, &dev->dev) == 0) {
759 if (fw->size >= CISTPL_MAX_CIS_SIZE) {
760 ret = -EINVAL;
761 dev_err(&dev->dev, "pcmcia: CIS override is too big\n");
762 goto release;
763 }
764
765 if (!pcmcia_replace_cis(s, fw->data, fw->size))
766 ret = 0;
767 else {
768 dev_err(&dev->dev, "pcmcia: CIS override failed\n");
769 goto release;
770 }
771
772 /* we need to re-start if the number of functions changed */
773 old_funcs = s->functions;
774 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC,
775 &mfc))
776 new_funcs = mfc.nfn;
777
778 if (old_funcs != new_funcs)
779 ret = -EBUSY;
780
781 /* update information */
782 pcmcia_device_query(dev);
783
784 /* requery (as number of functions might have changed) */
785 pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY);
786 }
787 release:
788 release_firmware(fw);
789
790 return ret;
791}
792
793#else /* !CONFIG_PCMCIA_LOAD_CIS */
794
795static inline int pcmcia_load_firmware(struct pcmcia_device *dev,
796 char *filename)
797{
798 return -ENODEV;
799}
800
801#endif
802
803
804static inline int pcmcia_devmatch(struct pcmcia_device *dev,
805 const struct pcmcia_device_id *did)
806{
807 if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
808 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
809 return 0;
810 }
811
812 if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
813 if ((!dev->has_card_id) || (dev->card_id != did->card_id))
814 return 0;
815 }
816
817 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
818 if (dev->func != did->function)
819 return 0;
820 }
821
822 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
823 if (!dev->prod_id[0])
824 return 0;
825 if (strcmp(did->prod_id[0], dev->prod_id[0]))
826 return 0;
827 }
828
829 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
830 if (!dev->prod_id[1])
831 return 0;
832 if (strcmp(did->prod_id[1], dev->prod_id[1]))
833 return 0;
834 }
835
836 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
837 if (!dev->prod_id[2])
838 return 0;
839 if (strcmp(did->prod_id[2], dev->prod_id[2]))
840 return 0;
841 }
842
843 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
844 if (!dev->prod_id[3])
845 return 0;
846 if (strcmp(did->prod_id[3], dev->prod_id[3]))
847 return 0;
848 }
849
850 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
851 dev_dbg(&dev->dev, "this is a pseudo-multi-function device\n");
852 mutex_lock(&dev->socket->ops_mutex);
853 dev->socket->pcmcia_pfc = 1;
854 mutex_unlock(&dev->socket->ops_mutex);
855 if (dev->device_no != did->device_no)
856 return 0;
857 }
858
859 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
860 int ret;
861
862 if ((!dev->has_func_id) || (dev->func_id != did->func_id))
863 return 0;
864
865 /* if this is a pseudo-multi-function device,
866 * we need explicit matches */
867 if (dev->socket->pcmcia_pfc)
868 return 0;
869 if (dev->device_no)
870 return 0;
871
872 /* also, FUNC_ID matching needs to be activated by userspace
873 * after it has re-checked that there is no possible module
874 * with a prod_id/manf_id/card_id match.
875 */
876 mutex_lock(&dev->socket->ops_mutex);
877 ret = dev->allow_func_id_match;
878 mutex_unlock(&dev->socket->ops_mutex);
879
880 if (!ret) {
881 dev_dbg(&dev->dev,
882 "skipping FUNC_ID match until userspace ACK\n");
883 return 0;
884 }
885 }
886
887 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
888 dev_dbg(&dev->dev, "device needs a fake CIS\n");
889 if (!dev->socket->fake_cis)
890 if (pcmcia_load_firmware(dev, did->cisfile))
891 return 0;
892 }
893
894 if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
895 int i;
896 for (i = 0; i < 4; i++)
897 if (dev->prod_id[i])
898 return 0;
899 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
900 return 0;
901 }
902
903 return 1;
904}
905
906
907static int pcmcia_bus_match(struct device *dev, struct device_driver *drv)
908{
909 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
910 struct pcmcia_driver *p_drv = to_pcmcia_drv(drv);
911 const struct pcmcia_device_id *did = p_drv->id_table;
912 struct pcmcia_dynid *dynid;
913
914 /* match dynamic devices first */
915 mutex_lock(&p_drv->dynids.lock);
916 list_for_each_entry(dynid, &p_drv->dynids.list, node) {
917 dev_dbg(dev, "trying to match to %s\n", drv->name);
918 if (pcmcia_devmatch(p_dev, &dynid->id)) {
919 dev_dbg(dev, "matched to %s\n", drv->name);
920 mutex_unlock(&p_drv->dynids.lock);
921 return 1;
922 }
923 }
924 mutex_unlock(&p_drv->dynids.lock);
925
926 while (did && did->match_flags) {
927 dev_dbg(dev, "trying to match to %s\n", drv->name);
928 if (pcmcia_devmatch(p_dev, did)) {
929 dev_dbg(dev, "matched to %s\n", drv->name);
930 return 1;
931 }
932 did++;
933 }
934
935 return 0;
936}
937
938static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
939{
940 struct pcmcia_device *p_dev;
941 int i;
942 u32 hash[4] = { 0, 0, 0, 0};
943
944 if (!dev)
945 return -ENODEV;
946
947 p_dev = to_pcmcia_dev(dev);
948
949 /* calculate hashes */
950 for (i = 0; i < 4; i++) {
951 if (!p_dev->prod_id[i])
952 continue;
953 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
954 }
955
956 if (add_uevent_var(env, "SOCKET_NO=%u", p_dev->socket->sock))
957 return -ENOMEM;
958
959 if (add_uevent_var(env, "DEVICE_NO=%02X", p_dev->device_no))
960 return -ENOMEM;
961
962 if (add_uevent_var(env, "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
963 "pa%08Xpb%08Xpc%08Xpd%08X",
964 p_dev->has_manf_id ? p_dev->manf_id : 0,
965 p_dev->has_card_id ? p_dev->card_id : 0,
966 p_dev->has_func_id ? p_dev->func_id : 0,
967 p_dev->func,
968 p_dev->device_no,
969 hash[0],
970 hash[1],
971 hash[2],
972 hash[3]))
973 return -ENOMEM;
974
975 return 0;
976}
977
978/************************ runtime PM support ***************************/
979
980static int pcmcia_dev_suspend(struct device *dev, pm_message_t state);
981static int pcmcia_dev_resume(struct device *dev);
982
983static int runtime_suspend(struct device *dev)
984{
985 int rc;
986
987 device_lock(dev);
988 rc = pcmcia_dev_suspend(dev, PMSG_SUSPEND);
989 device_unlock(dev);
990 return rc;
991}
992
993static int runtime_resume(struct device *dev)
994{
995 int rc;
996
997 device_lock(dev);
998 rc = pcmcia_dev_resume(dev);
999 device_unlock(dev);
1000 return rc;
1001}
1002
1003/************************ per-device sysfs output ***************************/
1004
1005#define pcmcia_device_attr(field, test, format) \
1006static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf) \
1007{ \
1008 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
1009 return p_dev->test ? sprintf(buf, format, p_dev->field) : -ENODEV; \
1010} \
1011static DEVICE_ATTR_RO(field);
1012
1013#define pcmcia_device_stringattr(name, field) \
1014static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf) \
1015{ \
1016 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
1017 return p_dev->field ? sprintf(buf, "%s\n", p_dev->field) : -ENODEV; \
1018} \
1019static DEVICE_ATTR_RO(name);
1020
1021pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
1022pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
1023pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
1024pcmcia_device_stringattr(prod_id1, prod_id[0]);
1025pcmcia_device_stringattr(prod_id2, prod_id[1]);
1026pcmcia_device_stringattr(prod_id3, prod_id[2]);
1027pcmcia_device_stringattr(prod_id4, prod_id[3]);
1028
1029static ssize_t function_show(struct device *dev, struct device_attribute *attr,
1030 char *buf)
1031{
1032 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1033 return p_dev->socket ? sprintf(buf, "0x%02x\n", p_dev->func) : -ENODEV;
1034}
1035static DEVICE_ATTR_RO(function);
1036
1037static ssize_t resources_show(struct device *dev,
1038 struct device_attribute *attr, char *buf)
1039{
1040 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1041 char *str = buf;
1042 int i;
1043
1044 for (i = 0; i < PCMCIA_NUM_RESOURCES; i++)
1045 str += sprintf(str, "%pr\n", p_dev->resource[i]);
1046
1047 return str - buf;
1048}
1049static DEVICE_ATTR_RO(resources);
1050
1051static ssize_t pm_state_show(struct device *dev, struct device_attribute *attr, char *buf)
1052{
1053 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1054
1055 if (p_dev->suspended)
1056 return sprintf(buf, "off\n");
1057 else
1058 return sprintf(buf, "on\n");
1059}
1060
1061static ssize_t pm_state_store(struct device *dev, struct device_attribute *attr,
1062 const char *buf, size_t count)
1063{
1064 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1065 int ret = 0;
1066
1067 if (!count)
1068 return -EINVAL;
1069
1070 if ((!p_dev->suspended) && !strncmp(buf, "off", 3))
1071 ret = runtime_suspend(dev);
1072 else if (p_dev->suspended && !strncmp(buf, "on", 2))
1073 ret = runtime_resume(dev);
1074
1075 return ret ? ret : count;
1076}
1077static DEVICE_ATTR_RW(pm_state);
1078
1079static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1080{
1081 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1082 int i;
1083 u32 hash[4] = { 0, 0, 0, 0};
1084
1085 /* calculate hashes */
1086 for (i = 0; i < 4; i++) {
1087 if (!p_dev->prod_id[i])
1088 continue;
1089 hash[i] = crc32(0, p_dev->prod_id[i],
1090 strlen(p_dev->prod_id[i]));
1091 }
1092 return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
1093 "pa%08Xpb%08Xpc%08Xpd%08X\n",
1094 p_dev->has_manf_id ? p_dev->manf_id : 0,
1095 p_dev->has_card_id ? p_dev->card_id : 0,
1096 p_dev->has_func_id ? p_dev->func_id : 0,
1097 p_dev->func, p_dev->device_no,
1098 hash[0], hash[1], hash[2], hash[3]);
1099}
1100static DEVICE_ATTR_RO(modalias);
1101
1102static ssize_t allow_func_id_match_store(struct device *dev,
1103 struct device_attribute *attr, const char *buf, size_t count)
1104{
1105 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1106
1107 if (!count)
1108 return -EINVAL;
1109
1110 mutex_lock(&p_dev->socket->ops_mutex);
1111 p_dev->allow_func_id_match = 1;
1112 mutex_unlock(&p_dev->socket->ops_mutex);
1113 pcmcia_parse_uevents(p_dev->socket, PCMCIA_UEVENT_REQUERY);
1114
1115 return count;
1116}
1117static DEVICE_ATTR_WO(allow_func_id_match);
1118
1119static struct attribute *pcmcia_dev_attrs[] = {
1120 &dev_attr_resources.attr,
1121 &dev_attr_pm_state.attr,
1122 &dev_attr_function.attr,
1123 &dev_attr_func_id.attr,
1124 &dev_attr_manf_id.attr,
1125 &dev_attr_card_id.attr,
1126 &dev_attr_prod_id1.attr,
1127 &dev_attr_prod_id2.attr,
1128 &dev_attr_prod_id3.attr,
1129 &dev_attr_prod_id4.attr,
1130 &dev_attr_modalias.attr,
1131 &dev_attr_allow_func_id_match.attr,
1132 NULL,
1133};
1134ATTRIBUTE_GROUPS(pcmcia_dev);
1135
1136/* PM support, also needed for reset */
1137
1138static int pcmcia_dev_suspend(struct device *dev, pm_message_t state)
1139{
1140 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1141 struct pcmcia_driver *p_drv = NULL;
1142 int ret = 0;
1143
1144 mutex_lock(&p_dev->socket->ops_mutex);
1145 if (p_dev->suspended) {
1146 mutex_unlock(&p_dev->socket->ops_mutex);
1147 return 0;
1148 }
1149 p_dev->suspended = 1;
1150 mutex_unlock(&p_dev->socket->ops_mutex);
1151
1152 dev_dbg(dev, "suspending\n");
1153
1154 if (dev->driver)
1155 p_drv = to_pcmcia_drv(dev->driver);
1156
1157 if (!p_drv)
1158 goto out;
1159
1160 if (p_drv->suspend) {
1161 ret = p_drv->suspend(p_dev);
1162 if (ret) {
1163 dev_err(dev,
1164 "pcmcia: device %s (driver %s) did not want to go to sleep (%d)\n",
1165 p_dev->devname, p_drv->name, ret);
1166 mutex_lock(&p_dev->socket->ops_mutex);
1167 p_dev->suspended = 0;
1168 mutex_unlock(&p_dev->socket->ops_mutex);
1169 goto out;
1170 }
1171 }
1172
1173 if (p_dev->device_no == p_dev->func) {
1174 dev_dbg(dev, "releasing configuration\n");
1175 pcmcia_release_configuration(p_dev);
1176 }
1177
1178 out:
1179 return ret;
1180}
1181
1182
1183static int pcmcia_dev_resume(struct device *dev)
1184{
1185 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1186 struct pcmcia_driver *p_drv = NULL;
1187 int ret = 0;
1188
1189 mutex_lock(&p_dev->socket->ops_mutex);
1190 if (!p_dev->suspended) {
1191 mutex_unlock(&p_dev->socket->ops_mutex);
1192 return 0;
1193 }
1194 p_dev->suspended = 0;
1195 mutex_unlock(&p_dev->socket->ops_mutex);
1196
1197 dev_dbg(dev, "resuming\n");
1198
1199 if (dev->driver)
1200 p_drv = to_pcmcia_drv(dev->driver);
1201
1202 if (!p_drv)
1203 goto out;
1204
1205 if (p_dev->device_no == p_dev->func) {
1206 dev_dbg(dev, "requesting configuration\n");
1207 ret = pcmcia_enable_device(p_dev);
1208 if (ret)
1209 goto out;
1210 }
1211
1212 if (p_drv->resume)
1213 ret = p_drv->resume(p_dev);
1214
1215 out:
1216 return ret;
1217}
1218
1219
1220static int pcmcia_bus_suspend_callback(struct device *dev, void *_data)
1221{
1222 struct pcmcia_socket *skt = _data;
1223 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1224
1225 if (p_dev->socket != skt || p_dev->suspended)
1226 return 0;
1227
1228 return runtime_suspend(dev);
1229}
1230
1231static int pcmcia_bus_resume_callback(struct device *dev, void *_data)
1232{
1233 struct pcmcia_socket *skt = _data;
1234 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1235
1236 if (p_dev->socket != skt || !p_dev->suspended)
1237 return 0;
1238
1239 runtime_resume(dev);
1240
1241 return 0;
1242}
1243
1244static int pcmcia_bus_resume(struct pcmcia_socket *skt)
1245{
1246 dev_dbg(&skt->dev, "resuming socket %d\n", skt->sock);
1247 bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback);
1248 return 0;
1249}
1250
1251static int pcmcia_bus_suspend(struct pcmcia_socket *skt)
1252{
1253 dev_dbg(&skt->dev, "suspending socket %d\n", skt->sock);
1254 if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt,
1255 pcmcia_bus_suspend_callback)) {
1256 pcmcia_bus_resume(skt);
1257 return -EIO;
1258 }
1259 return 0;
1260}
1261
1262static int pcmcia_bus_remove(struct pcmcia_socket *skt)
1263{
1264 atomic_set(&skt->present, 0);
1265 pcmcia_card_remove(skt, NULL);
1266
1267 mutex_lock(&skt->ops_mutex);
1268 destroy_cis_cache(skt);
1269 pcmcia_cleanup_irq(skt);
1270 mutex_unlock(&skt->ops_mutex);
1271
1272 return 0;
1273}
1274
1275static int pcmcia_bus_add(struct pcmcia_socket *skt)
1276{
1277 atomic_set(&skt->present, 1);
1278
1279 mutex_lock(&skt->ops_mutex);
1280 skt->pcmcia_pfc = 0;
1281 destroy_cis_cache(skt); /* to be on the safe side... */
1282 mutex_unlock(&skt->ops_mutex);
1283
1284 pcmcia_card_add(skt);
1285
1286 return 0;
1287}
1288
1289static int pcmcia_bus_early_resume(struct pcmcia_socket *skt)
1290{
1291 if (!verify_cis_cache(skt))
1292 return 0;
1293
1294 dev_dbg(&skt->dev, "cis mismatch - different card\n");
1295
1296 /* first, remove the card */
1297 pcmcia_bus_remove(skt);
1298
1299 mutex_lock(&skt->ops_mutex);
1300 destroy_cis_cache(skt);
1301 kfree(skt->fake_cis);
1302 skt->fake_cis = NULL;
1303 skt->functions = 0;
1304 mutex_unlock(&skt->ops_mutex);
1305
1306 /* now, add the new card */
1307 pcmcia_bus_add(skt);
1308 return 0;
1309}
1310
1311
1312/*
1313 * NOTE: This is racy. There's no guarantee the card will still be
1314 * physically present, even if the call to this function returns
1315 * non-NULL. Furthermore, the device driver most likely is unbound
1316 * almost immediately, so the timeframe where pcmcia_dev_present
1317 * returns NULL is probably really really small.
1318 */
1319struct pcmcia_device *pcmcia_dev_present(struct pcmcia_device *_p_dev)
1320{
1321 struct pcmcia_device *p_dev;
1322 struct pcmcia_device *ret = NULL;
1323
1324 p_dev = pcmcia_get_dev(_p_dev);
1325 if (!p_dev)
1326 return NULL;
1327
1328 if (atomic_read(&p_dev->socket->present) != 0)
1329 ret = p_dev;
1330
1331 pcmcia_put_dev(p_dev);
1332 return ret;
1333}
1334EXPORT_SYMBOL(pcmcia_dev_present);
1335
1336
1337static struct pcmcia_callback pcmcia_bus_callback = {
1338 .owner = THIS_MODULE,
1339 .add = pcmcia_bus_add,
1340 .remove = pcmcia_bus_remove,
1341 .requery = pcmcia_requery,
1342 .validate = pccard_validate_cis,
1343 .suspend = pcmcia_bus_suspend,
1344 .early_resume = pcmcia_bus_early_resume,
1345 .resume = pcmcia_bus_resume,
1346};
1347
1348static int pcmcia_bus_add_socket(struct device *dev,
1349 struct class_interface *class_intf)
1350{
1351 struct pcmcia_socket *socket = dev_get_drvdata(dev);
1352 int ret;
1353
1354 socket = pcmcia_get_socket(socket);
1355 if (!socket) {
1356 dev_err(dev, "PCMCIA obtaining reference to socket failed\n");
1357 return -ENODEV;
1358 }
1359
1360 ret = sysfs_create_bin_file(&dev->kobj, &pccard_cis_attr);
1361 if (ret) {
1362 dev_err(dev, "PCMCIA registration failed\n");
1363 pcmcia_put_socket(socket);
1364 return ret;
1365 }
1366
1367 INIT_LIST_HEAD(&socket->devices_list);
1368 socket->pcmcia_pfc = 0;
1369 socket->device_count = 0;
1370 atomic_set(&socket->present, 0);
1371
1372 ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback);
1373 if (ret) {
1374 dev_err(dev, "PCMCIA registration failed\n");
1375 pcmcia_put_socket(socket);
1376 return ret;
1377 }
1378
1379 return 0;
1380}
1381
1382static void pcmcia_bus_remove_socket(struct device *dev,
1383 struct class_interface *class_intf)
1384{
1385 struct pcmcia_socket *socket = dev_get_drvdata(dev);
1386
1387 if (!socket)
1388 return;
1389
1390 pccard_register_pcmcia(socket, NULL);
1391
1392 /* unregister any unbound devices */
1393 mutex_lock(&socket->skt_mutex);
1394 pcmcia_card_remove(socket, NULL);
1395 release_cis_mem(socket);
1396 mutex_unlock(&socket->skt_mutex);
1397
1398 sysfs_remove_bin_file(&dev->kobj, &pccard_cis_attr);
1399
1400 pcmcia_put_socket(socket);
1401
1402 return;
1403}
1404
1405
1406/* the pcmcia_bus_interface is used to handle pcmcia socket devices */
1407static struct class_interface pcmcia_bus_interface __refdata = {
1408 .class = &pcmcia_socket_class,
1409 .add_dev = &pcmcia_bus_add_socket,
1410 .remove_dev = &pcmcia_bus_remove_socket,
1411};
1412
1413
1414struct bus_type pcmcia_bus_type = {
1415 .name = "pcmcia",
1416 .uevent = pcmcia_bus_uevent,
1417 .match = pcmcia_bus_match,
1418 .dev_groups = pcmcia_dev_groups,
1419 .probe = pcmcia_device_probe,
1420 .remove = pcmcia_device_remove,
1421 .suspend = pcmcia_dev_suspend,
1422 .resume = pcmcia_dev_resume,
1423};
1424
1425
1426static int __init init_pcmcia_bus(void)
1427{
1428 int ret;
1429
1430 ret = bus_register(&pcmcia_bus_type);
1431 if (ret < 0) {
1432 printk(KERN_WARNING "pcmcia: bus_register error: %d\n", ret);
1433 return ret;
1434 }
1435 ret = class_interface_register(&pcmcia_bus_interface);
1436 if (ret < 0) {
1437 printk(KERN_WARNING
1438 "pcmcia: class_interface_register error: %d\n", ret);
1439 bus_unregister(&pcmcia_bus_type);
1440 return ret;
1441 }
1442
1443 return 0;
1444}
1445fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that
1446 * pcmcia_socket_class is already registered */
1447
1448
1449static void __exit exit_pcmcia_bus(void)
1450{
1451 class_interface_unregister(&pcmcia_bus_interface);
1452
1453 bus_unregister(&pcmcia_bus_type);
1454}
1455module_exit(exit_pcmcia_bus);
1456
1457
1458MODULE_ALIAS("ds");