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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 - 2006 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/cs_types.h> |
30 | #include <pcmcia/cs.h> |
31 | #include <pcmcia/cistpl.h> |
32 | #include <pcmcia/ds.h> |
33 | #include <pcmcia/ss.h> |
34 | |
35 | #include "cs_internal.h" |
36 | |
37 | /*====================================================================*/ |
38 | |
39 | /* Module parameters */ |
40 | |
41 | MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>"); |
42 | MODULE_DESCRIPTION("PCMCIA Driver Services"); |
43 | MODULE_LICENSE("GPL"); |
44 | |
45 | |
46 | /*====================================================================*/ |
47 | |
48 | static void pcmcia_check_driver(struct pcmcia_driver *p_drv) |
49 | { |
50 | struct pcmcia_device_id *did = p_drv->id_table; |
51 | unsigned int i; |
52 | u32 hash; |
53 | |
54 | if (!p_drv->probe || !p_drv->remove) |
55 | printk(KERN_DEBUG "pcmcia: %s lacks a requisite callback " |
56 | "function\n", p_drv->drv.name); |
57 | |
58 | while (did && did->match_flags) { |
59 | for (i = 0; i < 4; i++) { |
60 | if (!did->prod_id[i]) |
61 | continue; |
62 | |
63 | hash = crc32(0, did->prod_id[i], strlen(did->prod_id[i])); |
64 | if (hash == did->prod_id_hash[i]) |
65 | continue; |
66 | |
67 | printk(KERN_DEBUG "pcmcia: %s: invalid hash for " |
68 | "product string \"%s\": is 0x%x, should " |
69 | "be 0x%x\n", p_drv->drv.name, did->prod_id[i], |
70 | did->prod_id_hash[i], hash); |
71 | printk(KERN_DEBUG "pcmcia: see " |
72 | "Documentation/pcmcia/devicetable.txt for " |
73 | "details\n"); |
74 | } |
75 | did++; |
76 | } |
77 | |
78 | return; |
79 | } |
80 | |
81 | |
82 | /*======================================================================*/ |
83 | |
84 | |
85 | struct pcmcia_dynid { |
86 | struct list_head node; |
87 | struct pcmcia_device_id id; |
88 | }; |
89 | |
90 | /** |
91 | * pcmcia_store_new_id - add a new PCMCIA device ID to this driver and re-probe devices |
92 | * @driver: target device driver |
93 | * @buf: buffer for scanning device ID data |
94 | * @count: input size |
95 | * |
96 | * Adds a new dynamic PCMCIA device ID to this driver, |
97 | * and causes the driver to probe for all devices again. |
98 | */ |
99 | static ssize_t |
100 | pcmcia_store_new_id(struct device_driver *driver, const char *buf, size_t count) |
101 | { |
102 | struct pcmcia_dynid *dynid; |
103 | struct pcmcia_driver *pdrv = to_pcmcia_drv(driver); |
104 | __u16 match_flags, manf_id, card_id; |
105 | __u8 func_id, function, device_no; |
106 | __u32 prod_id_hash[4] = {0, 0, 0, 0}; |
107 | int fields = 0; |
108 | int retval = 0; |
109 | |
110 | fields = sscanf(buf, "%hx %hx %hx %hhx %hhx %hhx %x %x %x %x", |
111 | &match_flags, &manf_id, &card_id, &func_id, &function, &device_no, |
112 | &prod_id_hash[0], &prod_id_hash[1], &prod_id_hash[2], &prod_id_hash[3]); |
113 | if (fields < 6) |
114 | return -EINVAL; |
115 | |
116 | dynid = kzalloc(sizeof(struct pcmcia_dynid), GFP_KERNEL); |
117 | if (!dynid) |
118 | return -ENOMEM; |
119 | |
120 | dynid->id.match_flags = match_flags; |
121 | dynid->id.manf_id = manf_id; |
122 | dynid->id.card_id = card_id; |
123 | dynid->id.func_id = func_id; |
124 | dynid->id.function = function; |
125 | dynid->id.device_no = device_no; |
126 | memcpy(dynid->id.prod_id_hash, prod_id_hash, sizeof(__u32) * 4); |
127 | |
128 | mutex_lock(&pdrv->dynids.lock); |
129 | list_add_tail(&dynid->node, &pdrv->dynids.list); |
130 | mutex_unlock(&pdrv->dynids.lock); |
131 | |
132 | if (get_driver(&pdrv->drv)) { |
133 | retval = driver_attach(&pdrv->drv); |
134 | put_driver(&pdrv->drv); |
135 | } |
136 | |
137 | if (retval) |
138 | return retval; |
139 | return count; |
140 | } |
141 | static DRIVER_ATTR(new_id, S_IWUSR, NULL, pcmcia_store_new_id); |
142 | |
143 | static void |
144 | pcmcia_free_dynids(struct pcmcia_driver *drv) |
145 | { |
146 | struct pcmcia_dynid *dynid, *n; |
147 | |
148 | mutex_lock(&drv->dynids.lock); |
149 | list_for_each_entry_safe(dynid, n, &drv->dynids.list, node) { |
150 | list_del(&dynid->node); |
151 | kfree(dynid); |
152 | } |
153 | mutex_unlock(&drv->dynids.lock); |
154 | } |
155 | |
156 | static int |
157 | pcmcia_create_newid_file(struct pcmcia_driver *drv) |
158 | { |
159 | int error = 0; |
160 | if (drv->probe != NULL) |
161 | error = driver_create_file(&drv->drv, &driver_attr_new_id); |
162 | return error; |
163 | } |
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 | */ |
172 | int 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 | mutex_init(&driver->dynids.lock); |
185 | INIT_LIST_HEAD(&driver->dynids.list); |
186 | |
187 | pr_debug("registering driver %s\n", driver->drv.name); |
188 | |
189 | error = driver_register(&driver->drv); |
190 | if (error < 0) |
191 | return error; |
192 | |
193 | error = pcmcia_create_newid_file(driver); |
194 | if (error) |
195 | driver_unregister(&driver->drv); |
196 | |
197 | return error; |
198 | } |
199 | EXPORT_SYMBOL(pcmcia_register_driver); |
200 | |
201 | /** |
202 | * pcmcia_unregister_driver - unregister a PCMCIA driver with the bus core |
203 | * @driver: the &driver being unregistered |
204 | */ |
205 | void pcmcia_unregister_driver(struct pcmcia_driver *driver) |
206 | { |
207 | pr_debug("unregistering driver %s\n", driver->drv.name); |
208 | driver_unregister(&driver->drv); |
209 | pcmcia_free_dynids(driver); |
210 | } |
211 | EXPORT_SYMBOL(pcmcia_unregister_driver); |
212 | |
213 | |
214 | /* pcmcia_device handling */ |
215 | |
216 | struct pcmcia_device *pcmcia_get_dev(struct pcmcia_device *p_dev) |
217 | { |
218 | struct device *tmp_dev; |
219 | tmp_dev = get_device(&p_dev->dev); |
220 | if (!tmp_dev) |
221 | return NULL; |
222 | return to_pcmcia_dev(tmp_dev); |
223 | } |
224 | |
225 | void pcmcia_put_dev(struct pcmcia_device *p_dev) |
226 | { |
227 | if (p_dev) |
228 | put_device(&p_dev->dev); |
229 | } |
230 | |
231 | static void pcmcia_release_function(struct kref *ref) |
232 | { |
233 | struct config_t *c = container_of(ref, struct config_t, ref); |
234 | pr_debug("releasing config_t\n"); |
235 | kfree(c); |
236 | } |
237 | |
238 | static void pcmcia_release_dev(struct device *dev) |
239 | { |
240 | struct pcmcia_device *p_dev = to_pcmcia_dev(dev); |
241 | int i; |
242 | dev_dbg(dev, "releasing device\n"); |
243 | pcmcia_put_socket(p_dev->socket); |
244 | for (i = 0; i < 4; i++) |
245 | kfree(p_dev->prod_id[i]); |
246 | kfree(p_dev->devname); |
247 | kref_put(&p_dev->function_config->ref, pcmcia_release_function); |
248 | kfree(p_dev); |
249 | } |
250 | |
251 | |
252 | static int pcmcia_device_probe(struct device *dev) |
253 | { |
254 | struct pcmcia_device *p_dev; |
255 | struct pcmcia_driver *p_drv; |
256 | struct pcmcia_socket *s; |
257 | cistpl_config_t cis_config; |
258 | int ret = 0; |
259 | |
260 | dev = get_device(dev); |
261 | if (!dev) |
262 | return -ENODEV; |
263 | |
264 | p_dev = to_pcmcia_dev(dev); |
265 | p_drv = to_pcmcia_drv(dev->driver); |
266 | s = p_dev->socket; |
267 | |
268 | dev_dbg(dev, "trying to bind to %s\n", p_drv->drv.name); |
269 | |
270 | if ((!p_drv->probe) || (!p_dev->function_config) || |
271 | (!try_module_get(p_drv->owner))) { |
272 | ret = -EINVAL; |
273 | goto put_dev; |
274 | } |
275 | |
276 | /* set up some more device information */ |
277 | ret = pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_CONFIG, |
278 | &cis_config); |
279 | if (!ret) { |
280 | p_dev->conf.ConfigBase = cis_config.base; |
281 | p_dev->conf.Present = cis_config.rmask[0]; |
282 | } else { |
283 | dev_printk(KERN_INFO, dev, |
284 | "pcmcia: could not parse base and rmask0 of CIS\n"); |
285 | p_dev->conf.ConfigBase = 0; |
286 | p_dev->conf.Present = 0; |
287 | } |
288 | |
289 | ret = p_drv->probe(p_dev); |
290 | if (ret) { |
291 | dev_dbg(dev, "binding to %s failed with %d\n", |
292 | p_drv->drv.name, ret); |
293 | goto put_module; |
294 | } |
295 | |
296 | mutex_lock(&s->ops_mutex); |
297 | if ((s->pcmcia_state.has_pfc) && |
298 | (p_dev->socket->device_count == 1) && (p_dev->device_no == 0)) |
299 | pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY); |
300 | mutex_unlock(&s->ops_mutex); |
301 | |
302 | put_module: |
303 | if (ret) |
304 | module_put(p_drv->owner); |
305 | put_dev: |
306 | if (ret) |
307 | put_device(dev); |
308 | return ret; |
309 | } |
310 | |
311 | |
312 | /* |
313 | * Removes a PCMCIA card from the device tree and socket list. |
314 | */ |
315 | static void pcmcia_card_remove(struct pcmcia_socket *s, struct pcmcia_device *leftover) |
316 | { |
317 | struct pcmcia_device *p_dev; |
318 | struct pcmcia_device *tmp; |
319 | |
320 | dev_dbg(leftover ? &leftover->dev : &s->dev, |
321 | "pcmcia_card_remove(%d) %s\n", s->sock, |
322 | leftover ? leftover->devname : ""); |
323 | |
324 | mutex_lock(&s->ops_mutex); |
325 | if (!leftover) |
326 | s->device_count = 0; |
327 | else |
328 | s->device_count = 1; |
329 | mutex_unlock(&s->ops_mutex); |
330 | |
331 | /* unregister all pcmcia_devices registered with this socket, except leftover */ |
332 | list_for_each_entry_safe(p_dev, tmp, &s->devices_list, socket_device_list) { |
333 | if (p_dev == leftover) |
334 | continue; |
335 | |
336 | mutex_lock(&s->ops_mutex); |
337 | list_del(&p_dev->socket_device_list); |
338 | mutex_unlock(&s->ops_mutex); |
339 | |
340 | dev_dbg(&p_dev->dev, "unregistering device\n"); |
341 | device_unregister(&p_dev->dev); |
342 | } |
343 | |
344 | return; |
345 | } |
346 | |
347 | static int pcmcia_device_remove(struct device *dev) |
348 | { |
349 | struct pcmcia_device *p_dev; |
350 | struct pcmcia_driver *p_drv; |
351 | int i; |
352 | |
353 | p_dev = to_pcmcia_dev(dev); |
354 | p_drv = to_pcmcia_drv(dev->driver); |
355 | |
356 | dev_dbg(dev, "removing device\n"); |
357 | |
358 | /* If we're removing the primary module driving a |
359 | * pseudo multi-function card, we need to unbind |
360 | * all devices |
361 | */ |
362 | if ((p_dev->socket->pcmcia_state.has_pfc) && |
363 | (p_dev->socket->device_count > 0) && |
364 | (p_dev->device_no == 0)) |
365 | pcmcia_card_remove(p_dev->socket, p_dev); |
366 | |
367 | /* detach the "instance" */ |
368 | if (!p_drv) |
369 | return 0; |
370 | |
371 | if (p_drv->remove) |
372 | p_drv->remove(p_dev); |
373 | |
374 | p_dev->dev_node = NULL; |
375 | |
376 | /* check for proper unloading */ |
377 | if (p_dev->_irq || p_dev->_io || p_dev->_locked) |
378 | dev_printk(KERN_INFO, dev, |
379 | "pcmcia: driver %s did not release config properly\n", |
380 | p_drv->drv.name); |
381 | |
382 | for (i = 0; i < MAX_WIN; i++) |
383 | if (p_dev->_win & CLIENT_WIN_REQ(i)) |
384 | dev_printk(KERN_INFO, dev, |
385 | "pcmcia: driver %s did not release window properly\n", |
386 | p_drv->drv.name); |
387 | |
388 | /* references from pcmcia_probe_device */ |
389 | pcmcia_put_dev(p_dev); |
390 | module_put(p_drv->owner); |
391 | |
392 | return 0; |
393 | } |
394 | |
395 | |
396 | /* |
397 | * pcmcia_device_query -- determine information about a pcmcia device |
398 | */ |
399 | static int pcmcia_device_query(struct pcmcia_device *p_dev) |
400 | { |
401 | cistpl_manfid_t manf_id; |
402 | cistpl_funcid_t func_id; |
403 | cistpl_vers_1_t *vers1; |
404 | unsigned int i; |
405 | |
406 | vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL); |
407 | if (!vers1) |
408 | return -ENOMEM; |
409 | |
410 | if (!pccard_read_tuple(p_dev->socket, BIND_FN_ALL, |
411 | CISTPL_MANFID, &manf_id)) { |
412 | mutex_lock(&p_dev->socket->ops_mutex); |
413 | p_dev->manf_id = manf_id.manf; |
414 | p_dev->card_id = manf_id.card; |
415 | p_dev->has_manf_id = 1; |
416 | p_dev->has_card_id = 1; |
417 | mutex_unlock(&p_dev->socket->ops_mutex); |
418 | } |
419 | |
420 | if (!pccard_read_tuple(p_dev->socket, p_dev->func, |
421 | CISTPL_FUNCID, &func_id)) { |
422 | mutex_lock(&p_dev->socket->ops_mutex); |
423 | p_dev->func_id = func_id.func; |
424 | p_dev->has_func_id = 1; |
425 | mutex_unlock(&p_dev->socket->ops_mutex); |
426 | } else { |
427 | /* rule of thumb: cards with no FUNCID, but with |
428 | * common memory device geometry information, are |
429 | * probably memory cards (from pcmcia-cs) */ |
430 | cistpl_device_geo_t *devgeo; |
431 | |
432 | devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL); |
433 | if (!devgeo) { |
434 | kfree(vers1); |
435 | return -ENOMEM; |
436 | } |
437 | if (!pccard_read_tuple(p_dev->socket, p_dev->func, |
438 | CISTPL_DEVICE_GEO, devgeo)) { |
439 | dev_dbg(&p_dev->dev, |
440 | "mem device geometry probably means " |
441 | "FUNCID_MEMORY\n"); |
442 | mutex_lock(&p_dev->socket->ops_mutex); |
443 | p_dev->func_id = CISTPL_FUNCID_MEMORY; |
444 | p_dev->has_func_id = 1; |
445 | mutex_unlock(&p_dev->socket->ops_mutex); |
446 | } |
447 | kfree(devgeo); |
448 | } |
449 | |
450 | if (!pccard_read_tuple(p_dev->socket, BIND_FN_ALL, CISTPL_VERS_1, |
451 | vers1)) { |
452 | mutex_lock(&p_dev->socket->ops_mutex); |
453 | for (i = 0; i < min_t(unsigned int, 4, vers1->ns); i++) { |
454 | char *tmp; |
455 | unsigned int length; |
456 | char *new; |
457 | |
458 | tmp = vers1->str + vers1->ofs[i]; |
459 | |
460 | length = strlen(tmp) + 1; |
461 | if ((length < 2) || (length > 255)) |
462 | continue; |
463 | |
464 | new = kmalloc(sizeof(char) * length, GFP_KERNEL); |
465 | if (!new) |
466 | continue; |
467 | |
468 | new = strncpy(new, tmp, length); |
469 | |
470 | tmp = p_dev->prod_id[i]; |
471 | p_dev->prod_id[i] = new; |
472 | kfree(tmp); |
473 | } |
474 | mutex_unlock(&p_dev->socket->ops_mutex); |
475 | } |
476 | |
477 | kfree(vers1); |
478 | return 0; |
479 | } |
480 | |
481 | |
482 | /* device_add_lock is needed to avoid double registration by cardmgr and kernel. |
483 | * Serializes pcmcia_device_add; will most likely be removed in future. |
484 | * |
485 | * While it has the caveat that adding new PCMCIA devices inside(!) device_register() |
486 | * won't work, this doesn't matter much at the moment: the driver core doesn't |
487 | * support it either. |
488 | */ |
489 | static DEFINE_MUTEX(device_add_lock); |
490 | |
491 | struct pcmcia_device *pcmcia_device_add(struct pcmcia_socket *s, unsigned int function) |
492 | { |
493 | struct pcmcia_device *p_dev, *tmp_dev; |
494 | int i; |
495 | |
496 | s = pcmcia_get_socket(s); |
497 | if (!s) |
498 | return NULL; |
499 | |
500 | mutex_lock(&device_add_lock); |
501 | |
502 | pr_debug("adding device to %d, function %d\n", s->sock, function); |
503 | |
504 | p_dev = kzalloc(sizeof(struct pcmcia_device), GFP_KERNEL); |
505 | if (!p_dev) |
506 | goto err_put; |
507 | |
508 | mutex_lock(&s->ops_mutex); |
509 | p_dev->device_no = (s->device_count++); |
510 | mutex_unlock(&s->ops_mutex); |
511 | |
512 | /* max of 2 PFC devices */ |
513 | if ((p_dev->device_no >= 2) && (function == 0)) |
514 | goto err_free; |
515 | |
516 | /* max of 4 devices overall */ |
517 | if (p_dev->device_no >= 4) |
518 | goto err_free; |
519 | |
520 | p_dev->socket = s; |
521 | p_dev->func = function; |
522 | |
523 | p_dev->dev.bus = &pcmcia_bus_type; |
524 | p_dev->dev.parent = s->dev.parent; |
525 | p_dev->dev.release = pcmcia_release_dev; |
526 | /* by default don't allow DMA */ |
527 | p_dev->dma_mask = DMA_MASK_NONE; |
528 | p_dev->dev.dma_mask = &p_dev->dma_mask; |
529 | dev_set_name(&p_dev->dev, "%d.%d", p_dev->socket->sock, p_dev->device_no); |
530 | if (!dev_name(&p_dev->dev)) |
531 | goto err_free; |
532 | p_dev->devname = kasprintf(GFP_KERNEL, "pcmcia%s", dev_name(&p_dev->dev)); |
533 | if (!p_dev->devname) |
534 | goto err_free; |
535 | dev_dbg(&p_dev->dev, "devname is %s\n", p_dev->devname); |
536 | |
537 | mutex_lock(&s->ops_mutex); |
538 | |
539 | /* |
540 | * p_dev->function_config must be the same for all card functions. |
541 | * Note that this is serialized by the device_add_lock, so that |
542 | * only one such struct will be created. |
543 | */ |
544 | list_for_each_entry(tmp_dev, &s->devices_list, socket_device_list) |
545 | if (p_dev->func == tmp_dev->func) { |
546 | p_dev->function_config = tmp_dev->function_config; |
547 | p_dev->io = tmp_dev->io; |
548 | p_dev->irq = tmp_dev->irq; |
549 | kref_get(&p_dev->function_config->ref); |
550 | } |
551 | |
552 | /* Add to the list in pcmcia_bus_socket */ |
553 | list_add(&p_dev->socket_device_list, &s->devices_list); |
554 | |
555 | mutex_unlock(&s->ops_mutex); |
556 | |
557 | if (!p_dev->function_config) { |
558 | dev_dbg(&p_dev->dev, "creating config_t\n"); |
559 | p_dev->function_config = kzalloc(sizeof(struct config_t), |
560 | GFP_KERNEL); |
561 | if (!p_dev->function_config) |
562 | goto err_unreg; |
563 | kref_init(&p_dev->function_config->ref); |
564 | } |
565 | |
566 | dev_printk(KERN_NOTICE, &p_dev->dev, |
567 | "pcmcia: registering new device %s\n", |
568 | p_dev->devname); |
569 | |
570 | pcmcia_device_query(p_dev); |
571 | |
572 | if (device_register(&p_dev->dev)) |
573 | goto err_unreg; |
574 | |
575 | mutex_unlock(&device_add_lock); |
576 | |
577 | return p_dev; |
578 | |
579 | err_unreg: |
580 | mutex_lock(&s->ops_mutex); |
581 | list_del(&p_dev->socket_device_list); |
582 | mutex_unlock(&s->ops_mutex); |
583 | |
584 | err_free: |
585 | mutex_lock(&s->ops_mutex); |
586 | s->device_count--; |
587 | mutex_unlock(&s->ops_mutex); |
588 | |
589 | for (i = 0; i < 4; i++) |
590 | kfree(p_dev->prod_id[i]); |
591 | kfree(p_dev->devname); |
592 | kfree(p_dev); |
593 | err_put: |
594 | mutex_unlock(&device_add_lock); |
595 | pcmcia_put_socket(s); |
596 | |
597 | return NULL; |
598 | } |
599 | |
600 | |
601 | static int pcmcia_card_add(struct pcmcia_socket *s) |
602 | { |
603 | cistpl_longlink_mfc_t mfc; |
604 | unsigned int no_funcs, i, no_chains; |
605 | int ret = -EAGAIN; |
606 | |
607 | mutex_lock(&s->ops_mutex); |
608 | if (!(s->resource_setup_done)) { |
609 | dev_dbg(&s->dev, |
610 | "no resources available, delaying card_add\n"); |
611 | mutex_unlock(&s->ops_mutex); |
612 | return -EAGAIN; /* try again, but later... */ |
613 | } |
614 | |
615 | if (pcmcia_validate_mem(s)) { |
616 | dev_dbg(&s->dev, "validating mem resources failed, " |
617 | "delaying card_add\n"); |
618 | mutex_unlock(&s->ops_mutex); |
619 | return -EAGAIN; /* try again, but later... */ |
620 | } |
621 | mutex_unlock(&s->ops_mutex); |
622 | |
623 | ret = pccard_validate_cis(s, &no_chains); |
624 | if (ret || !no_chains) { |
625 | dev_dbg(&s->dev, "invalid CIS or invalid resources\n"); |
626 | return -ENODEV; |
627 | } |
628 | |
629 | if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc)) |
630 | no_funcs = mfc.nfn; |
631 | else |
632 | no_funcs = 1; |
633 | s->functions = no_funcs; |
634 | |
635 | for (i = 0; i < no_funcs; i++) |
636 | pcmcia_device_add(s, i); |
637 | |
638 | return ret; |
639 | } |
640 | |
641 | |
642 | static int pcmcia_requery_callback(struct device *dev, void * _data) |
643 | { |
644 | struct pcmcia_device *p_dev = to_pcmcia_dev(dev); |
645 | if (!p_dev->dev.driver) { |
646 | dev_dbg(dev, "update device information\n"); |
647 | pcmcia_device_query(p_dev); |
648 | } |
649 | |
650 | return 0; |
651 | } |
652 | |
653 | |
654 | static void pcmcia_requery(struct pcmcia_socket *s) |
655 | { |
656 | int has_pfc; |
657 | |
658 | if (s->functions == 0) { |
659 | pcmcia_card_add(s); |
660 | return; |
661 | } |
662 | |
663 | /* some device information might have changed because of a CIS |
664 | * update or because we can finally read it correctly... so |
665 | * determine it again, overwriting old values if necessary. */ |
666 | bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery_callback); |
667 | |
668 | /* if the CIS changed, we need to check whether the number of |
669 | * functions changed. */ |
670 | if (s->fake_cis) { |
671 | int old_funcs, new_funcs; |
672 | cistpl_longlink_mfc_t mfc; |
673 | |
674 | /* does this cis override add or remove functions? */ |
675 | old_funcs = s->functions; |
676 | |
677 | if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, |
678 | &mfc)) |
679 | new_funcs = mfc.nfn; |
680 | else |
681 | new_funcs = 1; |
682 | if (old_funcs != new_funcs) { |
683 | /* we need to re-start */ |
684 | pcmcia_card_remove(s, NULL); |
685 | pcmcia_card_add(s); |
686 | } |
687 | } |
688 | |
689 | /* If the PCMCIA device consists of two pseudo devices, |
690 | * call pcmcia_device_add() -- which will fail if both |
691 | * devices are already registered. */ |
692 | mutex_lock(&s->ops_mutex); |
693 | has_pfc = s->pcmcia_state.has_pfc; |
694 | mutex_unlock(&s->ops_mutex); |
695 | if (has_pfc) |
696 | pcmcia_device_add(s, 0); |
697 | |
698 | /* we re-scan all devices, not just the ones connected to this |
699 | * socket. This does not matter, though. */ |
700 | if (bus_rescan_devices(&pcmcia_bus_type)) |
701 | dev_warn(&s->dev, "rescanning the bus failed\n"); |
702 | } |
703 | |
704 | |
705 | #ifdef CONFIG_PCMCIA_LOAD_CIS |
706 | |
707 | /** |
708 | * pcmcia_load_firmware - load CIS from userspace if device-provided is broken |
709 | * @dev: the pcmcia device which needs a CIS override |
710 | * @filename: requested filename in /lib/firmware/ |
711 | * |
712 | * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if |
713 | * the one provided by the card is broken. The firmware files reside in |
714 | * /lib/firmware/ in userspace. |
715 | */ |
716 | static int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename) |
717 | { |
718 | struct pcmcia_socket *s = dev->socket; |
719 | const struct firmware *fw; |
720 | int ret = -ENOMEM; |
721 | cistpl_longlink_mfc_t mfc; |
722 | int old_funcs, new_funcs = 1; |
723 | |
724 | if (!filename) |
725 | return -EINVAL; |
726 | |
727 | dev_dbg(&dev->dev, "trying to load CIS file %s\n", filename); |
728 | |
729 | if (request_firmware(&fw, filename, &dev->dev) == 0) { |
730 | if (fw->size >= CISTPL_MAX_CIS_SIZE) { |
731 | ret = -EINVAL; |
732 | dev_printk(KERN_ERR, &dev->dev, |
733 | "pcmcia: CIS override is too big\n"); |
734 | goto release; |
735 | } |
736 | |
737 | if (!pcmcia_replace_cis(s, fw->data, fw->size)) |
738 | ret = 0; |
739 | else { |
740 | dev_printk(KERN_ERR, &dev->dev, |
741 | "pcmcia: CIS override failed\n"); |
742 | goto release; |
743 | } |
744 | |
745 | /* we need to re-start if the number of functions changed */ |
746 | old_funcs = s->functions; |
747 | if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, |
748 | &mfc)) |
749 | new_funcs = mfc.nfn; |
750 | |
751 | if (old_funcs != new_funcs) |
752 | ret = -EBUSY; |
753 | |
754 | /* update information */ |
755 | pcmcia_device_query(dev); |
756 | |
757 | /* requery (as number of functions might have changed) */ |
758 | pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY); |
759 | } |
760 | release: |
761 | release_firmware(fw); |
762 | |
763 | return ret; |
764 | } |
765 | |
766 | #else /* !CONFIG_PCMCIA_LOAD_CIS */ |
767 | |
768 | static inline int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename) |
769 | { |
770 | return -ENODEV; |
771 | } |
772 | |
773 | #endif |
774 | |
775 | |
776 | static inline int pcmcia_devmatch(struct pcmcia_device *dev, |
777 | struct pcmcia_device_id *did) |
778 | { |
779 | if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) { |
780 | if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id)) |
781 | return 0; |
782 | } |
783 | |
784 | if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) { |
785 | if ((!dev->has_card_id) || (dev->card_id != did->card_id)) |
786 | return 0; |
787 | } |
788 | |
789 | if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) { |
790 | if (dev->func != did->function) |
791 | return 0; |
792 | } |
793 | |
794 | if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) { |
795 | if (!dev->prod_id[0]) |
796 | return 0; |
797 | if (strcmp(did->prod_id[0], dev->prod_id[0])) |
798 | return 0; |
799 | } |
800 | |
801 | if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) { |
802 | if (!dev->prod_id[1]) |
803 | return 0; |
804 | if (strcmp(did->prod_id[1], dev->prod_id[1])) |
805 | return 0; |
806 | } |
807 | |
808 | if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) { |
809 | if (!dev->prod_id[2]) |
810 | return 0; |
811 | if (strcmp(did->prod_id[2], dev->prod_id[2])) |
812 | return 0; |
813 | } |
814 | |
815 | if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) { |
816 | if (!dev->prod_id[3]) |
817 | return 0; |
818 | if (strcmp(did->prod_id[3], dev->prod_id[3])) |
819 | return 0; |
820 | } |
821 | |
822 | if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) { |
823 | dev_dbg(&dev->dev, "this is a pseudo-multi-function device\n"); |
824 | mutex_lock(&dev->socket->ops_mutex); |
825 | dev->socket->pcmcia_state.has_pfc = 1; |
826 | mutex_unlock(&dev->socket->ops_mutex); |
827 | if (dev->device_no != did->device_no) |
828 | return 0; |
829 | } |
830 | |
831 | if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) { |
832 | int ret; |
833 | |
834 | if ((!dev->has_func_id) || (dev->func_id != did->func_id)) |
835 | return 0; |
836 | |
837 | /* if this is a pseudo-multi-function device, |
838 | * we need explicit matches */ |
839 | if (dev->socket->pcmcia_state.has_pfc) |
840 | return 0; |
841 | if (dev->device_no) |
842 | return 0; |
843 | |
844 | /* also, FUNC_ID matching needs to be activated by userspace |
845 | * after it has re-checked that there is no possible module |
846 | * with a prod_id/manf_id/card_id match. |
847 | */ |
848 | mutex_lock(&dev->socket->ops_mutex); |
849 | ret = dev->allow_func_id_match; |
850 | mutex_unlock(&dev->socket->ops_mutex); |
851 | |
852 | if (!ret) { |
853 | dev_dbg(&dev->dev, |
854 | "skipping FUNC_ID match until userspace ACK\n"); |
855 | return 0; |
856 | } |
857 | } |
858 | |
859 | if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) { |
860 | dev_dbg(&dev->dev, "device needs a fake CIS\n"); |
861 | if (!dev->socket->fake_cis) |
862 | if (pcmcia_load_firmware(dev, did->cisfile)) |
863 | return 0; |
864 | } |
865 | |
866 | if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) { |
867 | int i; |
868 | for (i = 0; i < 4; i++) |
869 | if (dev->prod_id[i]) |
870 | return 0; |
871 | if (dev->has_manf_id || dev->has_card_id || dev->has_func_id) |
872 | return 0; |
873 | } |
874 | |
875 | return 1; |
876 | } |
877 | |
878 | |
879 | static int pcmcia_bus_match(struct device *dev, struct device_driver *drv) |
880 | { |
881 | struct pcmcia_device *p_dev = to_pcmcia_dev(dev); |
882 | struct pcmcia_driver *p_drv = to_pcmcia_drv(drv); |
883 | struct pcmcia_device_id *did = p_drv->id_table; |
884 | struct pcmcia_dynid *dynid; |
885 | |
886 | /* match dynamic devices first */ |
887 | mutex_lock(&p_drv->dynids.lock); |
888 | list_for_each_entry(dynid, &p_drv->dynids.list, node) { |
889 | dev_dbg(dev, "trying to match to %s\n", drv->name); |
890 | if (pcmcia_devmatch(p_dev, &dynid->id)) { |
891 | dev_dbg(dev, "matched to %s\n", drv->name); |
892 | mutex_unlock(&p_drv->dynids.lock); |
893 | return 1; |
894 | } |
895 | } |
896 | mutex_unlock(&p_drv->dynids.lock); |
897 | |
898 | #ifdef CONFIG_PCMCIA_IOCTL |
899 | /* matching by cardmgr */ |
900 | if (p_dev->cardmgr == p_drv) { |
901 | dev_dbg(dev, "cardmgr matched to %s\n", drv->name); |
902 | return 1; |
903 | } |
904 | #endif |
905 | |
906 | while (did && did->match_flags) { |
907 | dev_dbg(dev, "trying to match to %s\n", drv->name); |
908 | if (pcmcia_devmatch(p_dev, did)) { |
909 | dev_dbg(dev, "matched to %s\n", drv->name); |
910 | return 1; |
911 | } |
912 | did++; |
913 | } |
914 | |
915 | return 0; |
916 | } |
917 | |
918 | #ifdef CONFIG_HOTPLUG |
919 | |
920 | static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env) |
921 | { |
922 | struct pcmcia_device *p_dev; |
923 | int i; |
924 | u32 hash[4] = { 0, 0, 0, 0}; |
925 | |
926 | if (!dev) |
927 | return -ENODEV; |
928 | |
929 | p_dev = to_pcmcia_dev(dev); |
930 | |
931 | /* calculate hashes */ |
932 | for (i = 0; i < 4; i++) { |
933 | if (!p_dev->prod_id[i]) |
934 | continue; |
935 | hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i])); |
936 | } |
937 | |
938 | if (add_uevent_var(env, "SOCKET_NO=%u", p_dev->socket->sock)) |
939 | return -ENOMEM; |
940 | |
941 | if (add_uevent_var(env, "DEVICE_NO=%02X", p_dev->device_no)) |
942 | return -ENOMEM; |
943 | |
944 | if (add_uevent_var(env, "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X" |
945 | "pa%08Xpb%08Xpc%08Xpd%08X", |
946 | p_dev->has_manf_id ? p_dev->manf_id : 0, |
947 | p_dev->has_card_id ? p_dev->card_id : 0, |
948 | p_dev->has_func_id ? p_dev->func_id : 0, |
949 | p_dev->func, |
950 | p_dev->device_no, |
951 | hash[0], |
952 | hash[1], |
953 | hash[2], |
954 | hash[3])) |
955 | return -ENOMEM; |
956 | |
957 | return 0; |
958 | } |
959 | |
960 | #else |
961 | |
962 | static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env) |
963 | { |
964 | return -ENODEV; |
965 | } |
966 | |
967 | #endif |
968 | |
969 | /************************ runtime PM support ***************************/ |
970 | |
971 | static int pcmcia_dev_suspend(struct device *dev, pm_message_t state); |
972 | static int pcmcia_dev_resume(struct device *dev); |
973 | |
974 | static int runtime_suspend(struct device *dev) |
975 | { |
976 | int rc; |
977 | |
978 | device_lock(dev); |
979 | rc = pcmcia_dev_suspend(dev, PMSG_SUSPEND); |
980 | device_unlock(dev); |
981 | return rc; |
982 | } |
983 | |
984 | static int runtime_resume(struct device *dev) |
985 | { |
986 | int rc; |
987 | |
988 | device_lock(dev); |
989 | rc = pcmcia_dev_resume(dev); |
990 | device_unlock(dev); |
991 | return rc; |
992 | } |
993 | |
994 | /************************ per-device sysfs output ***************************/ |
995 | |
996 | #define pcmcia_device_attr(field, test, format) \ |
997 | static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf) \ |
998 | { \ |
999 | struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \ |
1000 | return p_dev->test ? sprintf(buf, format, p_dev->field) : -ENODEV; \ |
1001 | } |
1002 | |
1003 | #define pcmcia_device_stringattr(name, field) \ |
1004 | static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf) \ |
1005 | { \ |
1006 | struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \ |
1007 | return p_dev->field ? sprintf(buf, "%s\n", p_dev->field) : -ENODEV; \ |
1008 | } |
1009 | |
1010 | pcmcia_device_attr(func, socket, "0x%02x\n"); |
1011 | pcmcia_device_attr(func_id, has_func_id, "0x%02x\n"); |
1012 | pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n"); |
1013 | pcmcia_device_attr(card_id, has_card_id, "0x%04x\n"); |
1014 | pcmcia_device_stringattr(prod_id1, prod_id[0]); |
1015 | pcmcia_device_stringattr(prod_id2, prod_id[1]); |
1016 | pcmcia_device_stringattr(prod_id3, prod_id[2]); |
1017 | pcmcia_device_stringattr(prod_id4, prod_id[3]); |
1018 | |
1019 | |
1020 | static ssize_t pcmcia_show_pm_state(struct device *dev, struct device_attribute *attr, char *buf) |
1021 | { |
1022 | struct pcmcia_device *p_dev = to_pcmcia_dev(dev); |
1023 | |
1024 | if (p_dev->suspended) |
1025 | return sprintf(buf, "off\n"); |
1026 | else |
1027 | return sprintf(buf, "on\n"); |
1028 | } |
1029 | |
1030 | static ssize_t pcmcia_store_pm_state(struct device *dev, struct device_attribute *attr, |
1031 | const char *buf, size_t count) |
1032 | { |
1033 | struct pcmcia_device *p_dev = to_pcmcia_dev(dev); |
1034 | int ret = 0; |
1035 | |
1036 | if (!count) |
1037 | return -EINVAL; |
1038 | |
1039 | if ((!p_dev->suspended) && !strncmp(buf, "off", 3)) |
1040 | ret = runtime_suspend(dev); |
1041 | else if (p_dev->suspended && !strncmp(buf, "on", 2)) |
1042 | ret = runtime_resume(dev); |
1043 | |
1044 | return ret ? ret : count; |
1045 | } |
1046 | |
1047 | |
1048 | static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf) |
1049 | { |
1050 | struct pcmcia_device *p_dev = to_pcmcia_dev(dev); |
1051 | int i; |
1052 | u32 hash[4] = { 0, 0, 0, 0}; |
1053 | |
1054 | /* calculate hashes */ |
1055 | for (i = 0; i < 4; i++) { |
1056 | if (!p_dev->prod_id[i]) |
1057 | continue; |
1058 | hash[i] = crc32(0, p_dev->prod_id[i], |
1059 | strlen(p_dev->prod_id[i])); |
1060 | } |
1061 | return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X" |
1062 | "pa%08Xpb%08Xpc%08Xpd%08X\n", |
1063 | p_dev->has_manf_id ? p_dev->manf_id : 0, |
1064 | p_dev->has_card_id ? p_dev->card_id : 0, |
1065 | p_dev->has_func_id ? p_dev->func_id : 0, |
1066 | p_dev->func, p_dev->device_no, |
1067 | hash[0], hash[1], hash[2], hash[3]); |
1068 | } |
1069 | |
1070 | static ssize_t pcmcia_store_allow_func_id_match(struct device *dev, |
1071 | struct device_attribute *attr, const char *buf, size_t count) |
1072 | { |
1073 | struct pcmcia_device *p_dev = to_pcmcia_dev(dev); |
1074 | |
1075 | if (!count) |
1076 | return -EINVAL; |
1077 | |
1078 | mutex_lock(&p_dev->socket->ops_mutex); |
1079 | p_dev->allow_func_id_match = 1; |
1080 | mutex_unlock(&p_dev->socket->ops_mutex); |
1081 | pcmcia_parse_uevents(p_dev->socket, PCMCIA_UEVENT_REQUERY); |
1082 | |
1083 | return count; |
1084 | } |
1085 | |
1086 | static struct device_attribute pcmcia_dev_attrs[] = { |
1087 | __ATTR(function, 0444, func_show, NULL), |
1088 | __ATTR(pm_state, 0644, pcmcia_show_pm_state, pcmcia_store_pm_state), |
1089 | __ATTR_RO(func_id), |
1090 | __ATTR_RO(manf_id), |
1091 | __ATTR_RO(card_id), |
1092 | __ATTR_RO(prod_id1), |
1093 | __ATTR_RO(prod_id2), |
1094 | __ATTR_RO(prod_id3), |
1095 | __ATTR_RO(prod_id4), |
1096 | __ATTR_RO(modalias), |
1097 | __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match), |
1098 | __ATTR_NULL, |
1099 | }; |
1100 | |
1101 | /* PM support, also needed for reset */ |
1102 | |
1103 | static int pcmcia_dev_suspend(struct device *dev, pm_message_t state) |
1104 | { |
1105 | struct pcmcia_device *p_dev = to_pcmcia_dev(dev); |
1106 | struct pcmcia_driver *p_drv = NULL; |
1107 | int ret = 0; |
1108 | |
1109 | mutex_lock(&p_dev->socket->ops_mutex); |
1110 | if (p_dev->suspended) { |
1111 | mutex_unlock(&p_dev->socket->ops_mutex); |
1112 | return 0; |
1113 | } |
1114 | p_dev->suspended = 1; |
1115 | mutex_unlock(&p_dev->socket->ops_mutex); |
1116 | |
1117 | dev_dbg(dev, "suspending\n"); |
1118 | |
1119 | if (dev->driver) |
1120 | p_drv = to_pcmcia_drv(dev->driver); |
1121 | |
1122 | if (!p_drv) |
1123 | goto out; |
1124 | |
1125 | if (p_drv->suspend) { |
1126 | ret = p_drv->suspend(p_dev); |
1127 | if (ret) { |
1128 | dev_printk(KERN_ERR, dev, |
1129 | "pcmcia: device %s (driver %s) did " |
1130 | "not want to go to sleep (%d)\n", |
1131 | p_dev->devname, p_drv->drv.name, ret); |
1132 | mutex_lock(&p_dev->socket->ops_mutex); |
1133 | p_dev->suspended = 0; |
1134 | mutex_unlock(&p_dev->socket->ops_mutex); |
1135 | goto out; |
1136 | } |
1137 | } |
1138 | |
1139 | if (p_dev->device_no == p_dev->func) { |
1140 | dev_dbg(dev, "releasing configuration\n"); |
1141 | pcmcia_release_configuration(p_dev); |
1142 | } |
1143 | |
1144 | out: |
1145 | return ret; |
1146 | } |
1147 | |
1148 | |
1149 | static int pcmcia_dev_resume(struct device *dev) |
1150 | { |
1151 | struct pcmcia_device *p_dev = to_pcmcia_dev(dev); |
1152 | struct pcmcia_driver *p_drv = NULL; |
1153 | int ret = 0; |
1154 | |
1155 | mutex_lock(&p_dev->socket->ops_mutex); |
1156 | if (!p_dev->suspended) { |
1157 | mutex_unlock(&p_dev->socket->ops_mutex); |
1158 | return 0; |
1159 | } |
1160 | p_dev->suspended = 0; |
1161 | mutex_unlock(&p_dev->socket->ops_mutex); |
1162 | |
1163 | dev_dbg(dev, "resuming\n"); |
1164 | |
1165 | if (dev->driver) |
1166 | p_drv = to_pcmcia_drv(dev->driver); |
1167 | |
1168 | if (!p_drv) |
1169 | goto out; |
1170 | |
1171 | if (p_dev->device_no == p_dev->func) { |
1172 | dev_dbg(dev, "requesting configuration\n"); |
1173 | ret = pcmcia_request_configuration(p_dev, &p_dev->conf); |
1174 | if (ret) |
1175 | goto out; |
1176 | } |
1177 | |
1178 | if (p_drv->resume) |
1179 | ret = p_drv->resume(p_dev); |
1180 | |
1181 | out: |
1182 | return ret; |
1183 | } |
1184 | |
1185 | |
1186 | static int pcmcia_bus_suspend_callback(struct device *dev, void * _data) |
1187 | { |
1188 | struct pcmcia_socket *skt = _data; |
1189 | struct pcmcia_device *p_dev = to_pcmcia_dev(dev); |
1190 | |
1191 | if (p_dev->socket != skt || p_dev->suspended) |
1192 | return 0; |
1193 | |
1194 | return runtime_suspend(dev); |
1195 | } |
1196 | |
1197 | static int pcmcia_bus_resume_callback(struct device *dev, void * _data) |
1198 | { |
1199 | struct pcmcia_socket *skt = _data; |
1200 | struct pcmcia_device *p_dev = to_pcmcia_dev(dev); |
1201 | |
1202 | if (p_dev->socket != skt || !p_dev->suspended) |
1203 | return 0; |
1204 | |
1205 | runtime_resume(dev); |
1206 | |
1207 | return 0; |
1208 | } |
1209 | |
1210 | static int pcmcia_bus_resume(struct pcmcia_socket *skt) |
1211 | { |
1212 | dev_dbg(&skt->dev, "resuming socket %d\n", skt->sock); |
1213 | bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback); |
1214 | return 0; |
1215 | } |
1216 | |
1217 | static int pcmcia_bus_suspend(struct pcmcia_socket *skt) |
1218 | { |
1219 | dev_dbg(&skt->dev, "suspending socket %d\n", skt->sock); |
1220 | if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt, |
1221 | pcmcia_bus_suspend_callback)) { |
1222 | pcmcia_bus_resume(skt); |
1223 | return -EIO; |
1224 | } |
1225 | return 0; |
1226 | } |
1227 | |
1228 | |
1229 | /*====================================================================== |
1230 | |
1231 | The card status event handler. |
1232 | |
1233 | ======================================================================*/ |
1234 | |
1235 | /* Normally, the event is passed to individual drivers after |
1236 | * informing userspace. Only for CS_EVENT_CARD_REMOVAL this |
1237 | * is inversed to maintain historic compatibility. |
1238 | */ |
1239 | |
1240 | static int ds_event(struct pcmcia_socket *skt, event_t event, int priority) |
1241 | { |
1242 | struct pcmcia_socket *s = pcmcia_get_socket(skt); |
1243 | |
1244 | if (!s) { |
1245 | dev_printk(KERN_ERR, &skt->dev, |
1246 | "PCMCIA obtaining reference to socket " \ |
1247 | "failed, event 0x%x lost!\n", event); |
1248 | return -ENODEV; |
1249 | } |
1250 | |
1251 | dev_dbg(&skt->dev, "ds_event(0x%06x, %d, 0x%p)\n", |
1252 | event, priority, skt); |
1253 | |
1254 | switch (event) { |
1255 | case CS_EVENT_CARD_REMOVAL: |
1256 | atomic_set(&skt->present, 0); |
1257 | pcmcia_card_remove(skt, NULL); |
1258 | handle_event(skt, event); |
1259 | mutex_lock(&s->ops_mutex); |
1260 | destroy_cis_cache(s); |
1261 | mutex_unlock(&s->ops_mutex); |
1262 | break; |
1263 | |
1264 | case CS_EVENT_CARD_INSERTION: |
1265 | atomic_set(&skt->present, 1); |
1266 | mutex_lock(&s->ops_mutex); |
1267 | s->pcmcia_state.has_pfc = 0; |
1268 | destroy_cis_cache(s); /* to be on the safe side... */ |
1269 | mutex_unlock(&s->ops_mutex); |
1270 | pcmcia_card_add(skt); |
1271 | handle_event(skt, event); |
1272 | break; |
1273 | |
1274 | case CS_EVENT_EJECTION_REQUEST: |
1275 | break; |
1276 | |
1277 | case CS_EVENT_PM_RESUME: |
1278 | if (verify_cis_cache(skt) != 0) { |
1279 | dev_dbg(&skt->dev, "cis mismatch - different card\n"); |
1280 | /* first, remove the card */ |
1281 | ds_event(skt, CS_EVENT_CARD_REMOVAL, CS_EVENT_PRI_HIGH); |
1282 | mutex_lock(&s->ops_mutex); |
1283 | destroy_cis_cache(skt); |
1284 | kfree(skt->fake_cis); |
1285 | skt->fake_cis = NULL; |
1286 | s->functions = 0; |
1287 | mutex_unlock(&s->ops_mutex); |
1288 | /* now, add the new card */ |
1289 | ds_event(skt, CS_EVENT_CARD_INSERTION, |
1290 | CS_EVENT_PRI_LOW); |
1291 | } |
1292 | handle_event(skt, event); |
1293 | break; |
1294 | |
1295 | case CS_EVENT_PM_SUSPEND: |
1296 | case CS_EVENT_RESET_PHYSICAL: |
1297 | case CS_EVENT_CARD_RESET: |
1298 | default: |
1299 | handle_event(skt, event); |
1300 | break; |
1301 | } |
1302 | |
1303 | pcmcia_put_socket(s); |
1304 | |
1305 | return 0; |
1306 | } /* ds_event */ |
1307 | |
1308 | /* |
1309 | * NOTE: This is racy. There's no guarantee the card will still be |
1310 | * physically present, even if the call to this function returns |
1311 | * non-NULL. Furthermore, the device driver most likely is unbound |
1312 | * almost immediately, so the timeframe where pcmcia_dev_present |
1313 | * returns NULL is probably really really small. |
1314 | */ |
1315 | struct pcmcia_device *pcmcia_dev_present(struct pcmcia_device *_p_dev) |
1316 | { |
1317 | struct pcmcia_device *p_dev; |
1318 | struct pcmcia_device *ret = NULL; |
1319 | |
1320 | p_dev = pcmcia_get_dev(_p_dev); |
1321 | if (!p_dev) |
1322 | return NULL; |
1323 | |
1324 | if (atomic_read(&p_dev->socket->present) != 0) |
1325 | ret = p_dev; |
1326 | |
1327 | pcmcia_put_dev(p_dev); |
1328 | return ret; |
1329 | } |
1330 | EXPORT_SYMBOL(pcmcia_dev_present); |
1331 | |
1332 | |
1333 | static struct pcmcia_callback pcmcia_bus_callback = { |
1334 | .owner = THIS_MODULE, |
1335 | .event = ds_event, |
1336 | .requery = pcmcia_requery, |
1337 | .validate = pccard_validate_cis, |
1338 | .suspend = pcmcia_bus_suspend, |
1339 | .resume = pcmcia_bus_resume, |
1340 | }; |
1341 | |
1342 | static int __devinit pcmcia_bus_add_socket(struct device *dev, |
1343 | struct class_interface *class_intf) |
1344 | { |
1345 | struct pcmcia_socket *socket = dev_get_drvdata(dev); |
1346 | int ret; |
1347 | |
1348 | socket = pcmcia_get_socket(socket); |
1349 | if (!socket) { |
1350 | dev_printk(KERN_ERR, dev, |
1351 | "PCMCIA obtaining reference to socket failed\n"); |
1352 | return -ENODEV; |
1353 | } |
1354 | |
1355 | ret = sysfs_create_bin_file(&dev->kobj, &pccard_cis_attr); |
1356 | if (ret) { |
1357 | dev_printk(KERN_ERR, dev, "PCMCIA registration failed\n"); |
1358 | pcmcia_put_socket(socket); |
1359 | return ret; |
1360 | } |
1361 | |
1362 | #ifdef CONFIG_PCMCIA_IOCTL |
1363 | init_waitqueue_head(&socket->queue); |
1364 | #endif |
1365 | INIT_LIST_HEAD(&socket->devices_list); |
1366 | memset(&socket->pcmcia_state, 0, sizeof(u8)); |
1367 | socket->device_count = 0; |
1368 | |
1369 | ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback); |
1370 | if (ret) { |
1371 | dev_printk(KERN_ERR, dev, "PCMCIA registration failed\n"); |
1372 | pcmcia_put_socket(socket); |
1373 | return ret; |
1374 | } |
1375 | |
1376 | atomic_set(&socket->present, 0); |
1377 | |
1378 | return 0; |
1379 | } |
1380 | |
1381 | static void pcmcia_bus_remove_socket(struct device *dev, |
1382 | struct class_interface *class_intf) |
1383 | { |
1384 | struct pcmcia_socket *socket = dev_get_drvdata(dev); |
1385 | |
1386 | if (!socket) |
1387 | return; |
1388 | |
1389 | pccard_register_pcmcia(socket, NULL); |
1390 | |
1391 | /* unregister any unbound devices */ |
1392 | mutex_lock(&socket->skt_mutex); |
1393 | pcmcia_card_remove(socket, NULL); |
1394 | release_cis_mem(socket); |
1395 | mutex_unlock(&socket->skt_mutex); |
1396 | |
1397 | sysfs_remove_bin_file(&dev->kobj, &pccard_cis_attr); |
1398 | |
1399 | pcmcia_put_socket(socket); |
1400 | |
1401 | return; |
1402 | } |
1403 | |
1404 | |
1405 | /* the pcmcia_bus_interface is used to handle pcmcia socket devices */ |
1406 | static struct class_interface pcmcia_bus_interface __refdata = { |
1407 | .class = &pcmcia_socket_class, |
1408 | .add_dev = &pcmcia_bus_add_socket, |
1409 | .remove_dev = &pcmcia_bus_remove_socket, |
1410 | }; |
1411 | |
1412 | |
1413 | struct bus_type pcmcia_bus_type = { |
1414 | .name = "pcmcia", |
1415 | .uevent = pcmcia_bus_uevent, |
1416 | .match = pcmcia_bus_match, |
1417 | .dev_attrs = pcmcia_dev_attrs, |
1418 | .probe = pcmcia_device_probe, |
1419 | .remove = pcmcia_device_remove, |
1420 | .suspend = pcmcia_dev_suspend, |
1421 | .resume = pcmcia_dev_resume, |
1422 | }; |
1423 | |
1424 | |
1425 | static int __init init_pcmcia_bus(void) |
1426 | { |
1427 | int ret; |
1428 | |
1429 | ret = bus_register(&pcmcia_bus_type); |
1430 | if (ret < 0) { |
1431 | printk(KERN_WARNING "pcmcia: bus_register error: %d\n", ret); |
1432 | return ret; |
1433 | } |
1434 | ret = class_interface_register(&pcmcia_bus_interface); |
1435 | if (ret < 0) { |
1436 | printk(KERN_WARNING |
1437 | "pcmcia: class_interface_register error: %d\n", ret); |
1438 | bus_unregister(&pcmcia_bus_type); |
1439 | return ret; |
1440 | } |
1441 | |
1442 | pcmcia_setup_ioctl(); |
1443 | |
1444 | return 0; |
1445 | } |
1446 | fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that |
1447 | * pcmcia_socket_class is already registered */ |
1448 | |
1449 | |
1450 | static void __exit exit_pcmcia_bus(void) |
1451 | { |
1452 | pcmcia_cleanup_ioctl(); |
1453 | |
1454 | class_interface_unregister(&pcmcia_bus_interface); |
1455 | |
1456 | bus_unregister(&pcmcia_bus_type); |
1457 | } |
1458 | module_exit(exit_pcmcia_bus); |
1459 | |
1460 | |
1461 | MODULE_ALIAS("ds"); |
1462 |
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