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Revert "backport: slub: fix possible NULL pointer dereference"
[linux-2.6.22.y-op.git] / drivers / pcmcia / ds.c
blob143c6efc478ab9c9bcfbdc926ab39fb5e7c08521
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
27 #define IN_CARD_SERVICES
28 #include <pcmcia/cs_types.h>
29 #include <pcmcia/cs.h>
30 #include <pcmcia/cistpl.h>
31 #include <pcmcia/ds.h>
32 #include <pcmcia/ss.h>
33
34 #include "cs_internal.h"
35 #include "ds_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 #ifdef DEBUG
46 int ds_pc_debug;
47
48 module_param_named(pc_debug, ds_pc_debug, int, 0644);
49
50 #define ds_dbg(lvl, fmt, arg...) do { \
51 if (ds_pc_debug > (lvl)) \
52 printk(KERN_DEBUG "ds: " fmt , ## arg); \
53 } while (0)
54 #else
55 #define ds_dbg(lvl, fmt, arg...) do { } while (0)
56 #endif
57
58 spinlock_t pcmcia_dev_list_lock;
59
60 /*====================================================================*/
61
62 /* code which was in cs.c before */
63
64 /* String tables for error messages */
65
66 typedef struct lookup_t {
67 int key;
68 char *msg;
69 } lookup_t;
70
71 static const lookup_t error_table[] = {
72 { CS_SUCCESS, "Operation succeeded" },
73 { CS_BAD_ADAPTER, "Bad adapter" },
74 { CS_BAD_ATTRIBUTE, "Bad attribute", },
75 { CS_BAD_BASE, "Bad base address" },
76 { CS_BAD_EDC, "Bad EDC" },
77 { CS_BAD_IRQ, "Bad IRQ" },
78 { CS_BAD_OFFSET, "Bad offset" },
79 { CS_BAD_PAGE, "Bad page number" },
80 { CS_READ_FAILURE, "Read failure" },
81 { CS_BAD_SIZE, "Bad size" },
82 { CS_BAD_SOCKET, "Bad socket" },
83 { CS_BAD_TYPE, "Bad type" },
84 { CS_BAD_VCC, "Bad Vcc" },
85 { CS_BAD_VPP, "Bad Vpp" },
86 { CS_BAD_WINDOW, "Bad window" },
87 { CS_WRITE_FAILURE, "Write failure" },
88 { CS_NO_CARD, "No card present" },
89 { CS_UNSUPPORTED_FUNCTION, "Usupported function" },
90 { CS_UNSUPPORTED_MODE, "Unsupported mode" },
91 { CS_BAD_SPEED, "Bad speed" },
92 { CS_BUSY, "Resource busy" },
93 { CS_GENERAL_FAILURE, "General failure" },
94 { CS_WRITE_PROTECTED, "Write protected" },
95 { CS_BAD_ARG_LENGTH, "Bad argument length" },
96 { CS_BAD_ARGS, "Bad arguments" },
97 { CS_CONFIGURATION_LOCKED, "Configuration locked" },
98 { CS_IN_USE, "Resource in use" },
99 { CS_NO_MORE_ITEMS, "No more items" },
100 { CS_OUT_OF_RESOURCE, "Out of resource" },
101 { CS_BAD_HANDLE, "Bad handle" },
102 { CS_BAD_TUPLE, "Bad CIS tuple" }
103 };
104
105
106 static const lookup_t service_table[] = {
107 { AccessConfigurationRegister, "AccessConfigurationRegister" },
108 { AddSocketServices, "AddSocketServices" },
109 { AdjustResourceInfo, "AdjustResourceInfo" },
110 { CheckEraseQueue, "CheckEraseQueue" },
111 { CloseMemory, "CloseMemory" },
112 { DeregisterClient, "DeregisterClient" },
113 { DeregisterEraseQueue, "DeregisterEraseQueue" },
114 { GetCardServicesInfo, "GetCardServicesInfo" },
115 { GetClientInfo, "GetClientInfo" },
116 { GetConfigurationInfo, "GetConfigurationInfo" },
117 { GetEventMask, "GetEventMask" },
118 { GetFirstClient, "GetFirstClient" },
119 { GetFirstRegion, "GetFirstRegion" },
120 { GetFirstTuple, "GetFirstTuple" },
121 { GetNextClient, "GetNextClient" },
122 { GetNextRegion, "GetNextRegion" },
123 { GetNextTuple, "GetNextTuple" },
124 { GetStatus, "GetStatus" },
125 { GetTupleData, "GetTupleData" },
126 { MapMemPage, "MapMemPage" },
127 { ModifyConfiguration, "ModifyConfiguration" },
128 { ModifyWindow, "ModifyWindow" },
129 { OpenMemory, "OpenMemory" },
130 { ParseTuple, "ParseTuple" },
131 { ReadMemory, "ReadMemory" },
132 { RegisterClient, "RegisterClient" },
133 { RegisterEraseQueue, "RegisterEraseQueue" },
134 { RegisterMTD, "RegisterMTD" },
135 { ReleaseConfiguration, "ReleaseConfiguration" },
136 { ReleaseIO, "ReleaseIO" },
137 { ReleaseIRQ, "ReleaseIRQ" },
138 { ReleaseWindow, "ReleaseWindow" },
139 { RequestConfiguration, "RequestConfiguration" },
140 { RequestIO, "RequestIO" },
141 { RequestIRQ, "RequestIRQ" },
142 { RequestSocketMask, "RequestSocketMask" },
143 { RequestWindow, "RequestWindow" },
144 { ResetCard, "ResetCard" },
145 { SetEventMask, "SetEventMask" },
146 { ValidateCIS, "ValidateCIS" },
147 { WriteMemory, "WriteMemory" },
148 { BindDevice, "BindDevice" },
149 { BindMTD, "BindMTD" },
150 { ReportError, "ReportError" },
151 { SuspendCard, "SuspendCard" },
152 { ResumeCard, "ResumeCard" },
153 { EjectCard, "EjectCard" },
154 { InsertCard, "InsertCard" },
155 { ReplaceCIS, "ReplaceCIS" }
156 };
157
158
159 static int pcmcia_report_error(struct pcmcia_device *p_dev, error_info_t *err)
160 {
161 int i;
162 char *serv;
163
164 if (!p_dev)
165 printk(KERN_NOTICE);
166 else
167 printk(KERN_NOTICE "%s: ", p_dev->dev.bus_id);
168
169 for (i = 0; i < ARRAY_SIZE(service_table); i++)
170 if (service_table[i].key == err->func)
171 break;
172 if (i < ARRAY_SIZE(service_table))
173 serv = service_table[i].msg;
174 else
175 serv = "Unknown service number";
176
177 for (i = 0; i < ARRAY_SIZE(error_table); i++)
178 if (error_table[i].key == err->retcode)
179 break;
180 if (i < ARRAY_SIZE(error_table))
181 printk("%s: %s\n", serv, error_table[i].msg);
182 else
183 printk("%s: Unknown error code %#x\n", serv, err->retcode);
184
185 return CS_SUCCESS;
186 } /* report_error */
187
188 /* end of code which was in cs.c before */
189
190 /*======================================================================*/
191
192 void cs_error(struct pcmcia_device *p_dev, int func, int ret)
193 {
194 error_info_t err = { func, ret };
195 pcmcia_report_error(p_dev, &err);
196 }
197 EXPORT_SYMBOL(cs_error);
198
199
200 static void pcmcia_check_driver(struct pcmcia_driver *p_drv)
201 {
202 struct pcmcia_device_id *did = p_drv->id_table;
203 unsigned int i;
204 u32 hash;
205
206 if (!p_drv->probe || !p_drv->remove)
207 printk(KERN_DEBUG "pcmcia: %s lacks a requisite callback "
208 "function\n", p_drv->drv.name);
209
210 while (did && did->match_flags) {
211 for (i=0; i<4; i++) {
212 if (!did->prod_id[i])
213 continue;
214
215 hash = crc32(0, did->prod_id[i], strlen(did->prod_id[i]));
216 if (hash == did->prod_id_hash[i])
217 continue;
218
219 printk(KERN_DEBUG "pcmcia: %s: invalid hash for "
220 "product string \"%s\": is 0x%x, should "
221 "be 0x%x\n", p_drv->drv.name, did->prod_id[i],
222 did->prod_id_hash[i], hash);
223 printk(KERN_DEBUG "pcmcia: see "
224 "Documentation/pcmcia/devicetable.txt for "
225 "details\n");
226 }
227 did++;
228 }
229
230 return;
231 }
232
233
234 /*======================================================================*/
235
236
237 struct pcmcia_dynid {
238 struct list_head node;
239 struct pcmcia_device_id id;
240 };
241
242 /**
243 * pcmcia_store_new_id - add a new PCMCIA device ID to this driver and re-probe devices
244 * @driver: target device driver
245 * @buf: buffer for scanning device ID data
246 * @count: input size
247 *
248 * Adds a new dynamic PCMCIA device ID to this driver,
249 * and causes the driver to probe for all devices again.
250 */
251 static ssize_t
252 pcmcia_store_new_id(struct device_driver *driver, const char *buf, size_t count)
253 {
254 struct pcmcia_dynid *dynid;
255 struct pcmcia_driver *pdrv = to_pcmcia_drv(driver);
256 __u16 match_flags, manf_id, card_id;
257 __u8 func_id, function, device_no;
258 __u32 prod_id_hash[4] = {0, 0, 0, 0};
259 int fields=0;
260 int retval = 0;
261
262 fields = sscanf(buf, "%hx %hx %hx %hhx %hhx %hhx %x %x %x %x",
263 &match_flags, &manf_id, &card_id, &func_id, &function, &device_no,
264 &prod_id_hash[0], &prod_id_hash[1], &prod_id_hash[2], &prod_id_hash[3]);
265 if (fields < 6)
266 return -EINVAL;
267
268 dynid = kzalloc(sizeof(struct pcmcia_dynid), GFP_KERNEL);
269 if (!dynid)
270 return -ENOMEM;
271
272 INIT_LIST_HEAD(&dynid->node);
273 dynid->id.match_flags = match_flags;
274 dynid->id.manf_id = manf_id;
275 dynid->id.card_id = card_id;
276 dynid->id.func_id = func_id;
277 dynid->id.function = function;
278 dynid->id.device_no = device_no;
279 memcpy(dynid->id.prod_id_hash, prod_id_hash, sizeof(__u32) * 4);
280
281 spin_lock(&pdrv->dynids.lock);
282 list_add_tail(&pdrv->dynids.list, &dynid->node);
283 spin_unlock(&pdrv->dynids.lock);
284
285 if (get_driver(&pdrv->drv)) {
286 retval = driver_attach(&pdrv->drv);
287 put_driver(&pdrv->drv);
288 }
289
290 if (retval)
291 return retval;
292 return count;
293 }
294 static DRIVER_ATTR(new_id, S_IWUSR, NULL, pcmcia_store_new_id);
295
296 static void
297 pcmcia_free_dynids(struct pcmcia_driver *drv)
298 {
299 struct pcmcia_dynid *dynid, *n;
300
301 spin_lock(&drv->dynids.lock);
302 list_for_each_entry_safe(dynid, n, &drv->dynids.list, node) {
303 list_del(&dynid->node);
304 kfree(dynid);
305 }
306 spin_unlock(&drv->dynids.lock);
307 }
308
309 static int
310 pcmcia_create_newid_file(struct pcmcia_driver *drv)
311 {
312 int error = 0;
313 if (drv->probe != NULL)
314 error = sysfs_create_file(&drv->drv.kobj,
315 &driver_attr_new_id.attr);
316 return error;
317 }
318
319
320 /**
321 * pcmcia_register_driver - register a PCMCIA driver with the bus core
322 *
323 * Registers a PCMCIA driver with the PCMCIA bus core.
324 */
325 int pcmcia_register_driver(struct pcmcia_driver *driver)
326 {
327 int error;
328
329 if (!driver)
330 return -EINVAL;
331
332 pcmcia_check_driver(driver);
333
334 /* initialize common fields */
335 driver->drv.bus = &pcmcia_bus_type;
336 driver->drv.owner = driver->owner;
337 spin_lock_init(&driver->dynids.lock);
338 INIT_LIST_HEAD(&driver->dynids.list);
339
340 ds_dbg(3, "registering driver %s\n", driver->drv.name);
341
342 error = driver_register(&driver->drv);
343 if (error < 0)
344 return error;
345
346 error = pcmcia_create_newid_file(driver);
347 if (error)
348 driver_unregister(&driver->drv);
349
350 return error;
351 }
352 EXPORT_SYMBOL(pcmcia_register_driver);
353
354 /**
355 * pcmcia_unregister_driver - unregister a PCMCIA driver with the bus core
356 */
357 void pcmcia_unregister_driver(struct pcmcia_driver *driver)
358 {
359 ds_dbg(3, "unregistering driver %s\n", driver->drv.name);
360 driver_unregister(&driver->drv);
361 pcmcia_free_dynids(driver);
362 }
363 EXPORT_SYMBOL(pcmcia_unregister_driver);
364
365
366 /* pcmcia_device handling */
367
368 struct pcmcia_device * pcmcia_get_dev(struct pcmcia_device *p_dev)
369 {
370 struct device *tmp_dev;
371 tmp_dev = get_device(&p_dev->dev);
372 if (!tmp_dev)
373 return NULL;
374 return to_pcmcia_dev(tmp_dev);
375 }
376
377 void pcmcia_put_dev(struct pcmcia_device *p_dev)
378 {
379 if (p_dev)
380 put_device(&p_dev->dev);
381 }
382
383 static void pcmcia_release_function(struct kref *ref)
384 {
385 struct config_t *c = container_of(ref, struct config_t, ref);
386 ds_dbg(1, "releasing config_t\n");
387 kfree(c);
388 }
389
390 static void pcmcia_release_dev(struct device *dev)
391 {
392 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
393 ds_dbg(1, "releasing device %s\n", p_dev->dev.bus_id);
394 pcmcia_put_socket(p_dev->socket);
395 kfree(p_dev->devname);
396 kref_put(&p_dev->function_config->ref, pcmcia_release_function);
397 kfree(p_dev);
398 }
399
400 static void pcmcia_add_device_later(struct pcmcia_socket *s, int mfc)
401 {
402 if (!s->pcmcia_state.device_add_pending) {
403 ds_dbg(1, "scheduling to add %s secondary"
404 " device to %d\n", mfc ? "mfc" : "pfc", s->sock);
405 s->pcmcia_state.device_add_pending = 1;
406 s->pcmcia_state.mfc_pfc = mfc;
407 schedule_work(&s->device_add);
408 }
409 return;
410 }
411
412 static int pcmcia_device_probe(struct device * dev)
413 {
414 struct pcmcia_device *p_dev;
415 struct pcmcia_driver *p_drv;
416 struct pcmcia_device_id *did;
417 struct pcmcia_socket *s;
418 cistpl_config_t cis_config;
419 int ret = 0;
420
421 dev = get_device(dev);
422 if (!dev)
423 return -ENODEV;
424
425 p_dev = to_pcmcia_dev(dev);
426 p_drv = to_pcmcia_drv(dev->driver);
427 s = p_dev->socket;
428
429 ds_dbg(1, "trying to bind %s to %s\n", p_dev->dev.bus_id,
430 p_drv->drv.name);
431
432 if ((!p_drv->probe) || (!p_dev->function_config) ||
433 (!try_module_get(p_drv->owner))) {
434 ret = -EINVAL;
435 goto put_dev;
436 }
437
438 /* set up some more device information */
439 ret = pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_CONFIG,
440 &cis_config);
441 if (!ret) {
442 p_dev->conf.ConfigBase = cis_config.base;
443 p_dev->conf.Present = cis_config.rmask[0];
444 } else {
445 printk(KERN_INFO "pcmcia: could not parse base and rmask0 of CIS\n");
446 p_dev->conf.ConfigBase = 0;
447 p_dev->conf.Present = 0;
448 }
449
450 ret = p_drv->probe(p_dev);
451 if (ret) {
452 ds_dbg(1, "binding %s to %s failed with %d\n",
453 p_dev->dev.bus_id, p_drv->drv.name, ret);
454 goto put_module;
455 }
456
457 /* handle pseudo multifunction devices:
458 * there are at most two pseudo multifunction devices.
459 * if we're matching against the first, schedule a
460 * call which will then check whether there are two
461 * pseudo devices, and if not, add the second one.
462 */
463 did = p_dev->dev.driver_data;
464 if (did && (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) &&
465 (p_dev->socket->device_count == 1) && (p_dev->device_no == 0))
466 pcmcia_add_device_later(p_dev->socket, 0);
467
468 put_module:
469 if (ret)
470 module_put(p_drv->owner);
471 put_dev:
472 if (ret)
473 put_device(dev);
474 return (ret);
475 }
476
477
478 /*
479 * Removes a PCMCIA card from the device tree and socket list.
480 */
481 static void pcmcia_card_remove(struct pcmcia_socket *s, struct pcmcia_device *leftover)
482 {
483 struct pcmcia_device *p_dev;
484 struct pcmcia_device *tmp;
485 unsigned long flags;
486
487 ds_dbg(2, "pcmcia_card_remove(%d) %s\n", s->sock,
488 leftover ? leftover->devname : "");
489
490 if (!leftover)
491 s->device_count = 0;
492 else
493 s->device_count = 1;
494
495 /* unregister all pcmcia_devices registered with this socket, except leftover */
496 list_for_each_entry_safe(p_dev, tmp, &s->devices_list, socket_device_list) {
497 if (p_dev == leftover)
498 continue;
499
500 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
501 list_del(&p_dev->socket_device_list);
502 p_dev->_removed=1;
503 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
504
505 ds_dbg(2, "unregistering device %s\n", p_dev->dev.bus_id);
506 device_unregister(&p_dev->dev);
507 }
508
509 return;
510 }
511
512 static int pcmcia_device_remove(struct device * dev)
513 {
514 struct pcmcia_device *p_dev;
515 struct pcmcia_driver *p_drv;
516 struct pcmcia_device_id *did;
517 int i;
518
519 p_dev = to_pcmcia_dev(dev);
520 p_drv = to_pcmcia_drv(dev->driver);
521
522 ds_dbg(1, "removing device %s\n", p_dev->dev.bus_id);
523
524 /* If we're removing the primary module driving a
525 * pseudo multi-function card, we need to unbind
526 * all devices
527 */
528 did = p_dev->dev.driver_data;
529 if (did && (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) &&
530 (p_dev->socket->device_count != 0) &&
531 (p_dev->device_no == 0))
532 pcmcia_card_remove(p_dev->socket, p_dev);
533
534 /* detach the "instance" */
535 if (!p_drv)
536 return 0;
537
538 if (p_drv->remove)
539 p_drv->remove(p_dev);
540
541 p_dev->dev_node = NULL;
542
543 /* check for proper unloading */
544 if (p_dev->_irq || p_dev->_io || p_dev->_locked)
545 printk(KERN_INFO "pcmcia: driver %s did not release config properly\n",
546 p_drv->drv.name);
547
548 for (i = 0; i < MAX_WIN; i++)
549 if (p_dev->_win & CLIENT_WIN_REQ(i))
550 printk(KERN_INFO "pcmcia: driver %s did not release windows properly\n",
551 p_drv->drv.name);
552
553 /* references from pcmcia_probe_device */
554 pcmcia_put_dev(p_dev);
555 module_put(p_drv->owner);
556
557 return 0;
558 }
559
560
561 /*
562 * pcmcia_device_query -- determine information about a pcmcia device
563 */
564 static int pcmcia_device_query(struct pcmcia_device *p_dev)
565 {
566 cistpl_manfid_t manf_id;
567 cistpl_funcid_t func_id;
568 cistpl_vers_1_t *vers1;
569 unsigned int i;
570
571 vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL);
572 if (!vers1)
573 return -ENOMEM;
574
575 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
576 CISTPL_MANFID, &manf_id)) {
577 p_dev->manf_id = manf_id.manf;
578 p_dev->card_id = manf_id.card;
579 p_dev->has_manf_id = 1;
580 p_dev->has_card_id = 1;
581 }
582
583 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
584 CISTPL_FUNCID, &func_id)) {
585 p_dev->func_id = func_id.func;
586 p_dev->has_func_id = 1;
587 } else {
588 /* rule of thumb: cards with no FUNCID, but with
589 * common memory device geometry information, are
590 * probably memory cards (from pcmcia-cs) */
591 cistpl_device_geo_t *devgeo;
592
593 devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL);
594 if (!devgeo) {
595 kfree(vers1);
596 return -ENOMEM;
597 }
598 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
599 CISTPL_DEVICE_GEO, devgeo)) {
600 ds_dbg(0, "mem device geometry probably means "
601 "FUNCID_MEMORY\n");
602 p_dev->func_id = CISTPL_FUNCID_MEMORY;
603 p_dev->has_func_id = 1;
604 }
605 kfree(devgeo);
606 }
607
608 if (!pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_VERS_1,
609 vers1)) {
610 for (i=0; i < vers1->ns; i++) {
611 char *tmp;
612 unsigned int length;
613
614 tmp = vers1->str + vers1->ofs[i];
615
616 length = strlen(tmp) + 1;
617 if ((length < 2) || (length > 255))
618 continue;
619
620 p_dev->prod_id[i] = kmalloc(sizeof(char) * length,
621 GFP_KERNEL);
622 if (!p_dev->prod_id[i])
623 continue;
624
625 p_dev->prod_id[i] = strncpy(p_dev->prod_id[i],
626 tmp, length);
627 }
628 }
629
630 kfree(vers1);
631 return 0;
632 }
633
634
635 /* device_add_lock is needed to avoid double registration by cardmgr and kernel.
636 * Serializes pcmcia_device_add; will most likely be removed in future.
637 *
638 * While it has the caveat that adding new PCMCIA devices inside(!) device_register()
639 * won't work, this doesn't matter much at the moment: the driver core doesn't
640 * support it either.
641 */
642 static DEFINE_MUTEX(device_add_lock);
643
644 struct pcmcia_device * pcmcia_device_add(struct pcmcia_socket *s, unsigned int function)
645 {
646 struct pcmcia_device *p_dev, *tmp_dev;
647 unsigned long flags;
648 int bus_id_len;
649
650 s = pcmcia_get_socket(s);
651 if (!s)
652 return NULL;
653
654 mutex_lock(&device_add_lock);
655
656 ds_dbg(3, "adding device to %d, function %d\n", s->sock, function);
657
658 /* max of 4 devices per card */
659 if (s->device_count == 4)
660 goto err_put;
661
662 p_dev = kzalloc(sizeof(struct pcmcia_device), GFP_KERNEL);
663 if (!p_dev)
664 goto err_put;
665
666 p_dev->socket = s;
667 p_dev->device_no = (s->device_count++);
668 p_dev->func = function;
669
670 p_dev->dev.bus = &pcmcia_bus_type;
671 p_dev->dev.parent = s->dev.parent;
672 p_dev->dev.release = pcmcia_release_dev;
673 bus_id_len = sprintf (p_dev->dev.bus_id, "%d.%d", p_dev->socket->sock, p_dev->device_no);
674
675 p_dev->devname = kmalloc(6 + bus_id_len + 1, GFP_KERNEL);
676 if (!p_dev->devname)
677 goto err_free;
678 sprintf (p_dev->devname, "pcmcia%s", p_dev->dev.bus_id);
679 ds_dbg(3, "devname is %s\n", p_dev->devname);
680
681 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
682
683 /*
684 * p_dev->function_config must be the same for all card functions.
685 * Note that this is serialized by the device_add_lock, so that
686 * only one such struct will be created.
687 */
688 list_for_each_entry(tmp_dev, &s->devices_list, socket_device_list)
689 if (p_dev->func == tmp_dev->func) {
690 p_dev->function_config = tmp_dev->function_config;
691 kref_get(&p_dev->function_config->ref);
692 }
693
694 /* Add to the list in pcmcia_bus_socket */
695 list_add(&p_dev->socket_device_list, &s->devices_list);
696
697 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
698
699 if (!p_dev->function_config) {
700 ds_dbg(3, "creating config_t for %s\n", p_dev->dev.bus_id);
701 p_dev->function_config = kzalloc(sizeof(struct config_t),
702 GFP_KERNEL);
703 if (!p_dev->function_config)
704 goto err_unreg;
705 kref_init(&p_dev->function_config->ref);
706 }
707
708 printk(KERN_NOTICE "pcmcia: registering new device %s\n",
709 p_dev->devname);
710
711 pcmcia_device_query(p_dev);
712
713 if (device_register(&p_dev->dev))
714 goto err_unreg;
715
716 mutex_unlock(&device_add_lock);
717
718 return p_dev;
719
720 err_unreg:
721 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
722 list_del(&p_dev->socket_device_list);
723 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
724
725 err_free:
726 kfree(p_dev->devname);
727 kfree(p_dev);
728 s->device_count--;
729 err_put:
730 mutex_unlock(&device_add_lock);
731 pcmcia_put_socket(s);
732
733 return NULL;
734 }
735
736
737 static int pcmcia_card_add(struct pcmcia_socket *s)
738 {
739 cisinfo_t cisinfo;
740 cistpl_longlink_mfc_t mfc;
741 unsigned int no_funcs, i;
742 int ret = 0;
743
744 if (!(s->resource_setup_done)) {
745 ds_dbg(3, "no resources available, delaying card_add\n");
746 return -EAGAIN; /* try again, but later... */
747 }
748
749 if (pcmcia_validate_mem(s)) {
750 ds_dbg(3, "validating mem resources failed, "
751 "delaying card_add\n");
752 return -EAGAIN; /* try again, but later... */
753 }
754
755 ret = pccard_validate_cis(s, BIND_FN_ALL, &cisinfo);
756 if (ret || !cisinfo.Chains) {
757 ds_dbg(0, "invalid CIS or invalid resources\n");
758 return -ENODEV;
759 }
760
761 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
762 no_funcs = mfc.nfn;
763 else
764 no_funcs = 1;
765 s->functions = no_funcs;
766
767 for (i=0; i < no_funcs; i++)
768 pcmcia_device_add(s, i);
769
770 return (ret);
771 }
772
773
774 static void pcmcia_delayed_add_device(struct work_struct *work)
775 {
776 struct pcmcia_socket *s =
777 container_of(work, struct pcmcia_socket, device_add);
778 ds_dbg(1, "adding additional device to %d\n", s->sock);
779 pcmcia_device_add(s, s->pcmcia_state.mfc_pfc);
780 s->pcmcia_state.device_add_pending = 0;
781 s->pcmcia_state.mfc_pfc = 0;
782 }
783
784 static int pcmcia_requery(struct device *dev, void * _data)
785 {
786 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
787 if (!p_dev->dev.driver) {
788 ds_dbg(1, "update device information for %s\n",
789 p_dev->dev.bus_id);
790 pcmcia_device_query(p_dev);
791 }
792
793 return 0;
794 }
795
796 static void pcmcia_bus_rescan(struct pcmcia_socket *skt, int new_cis)
797 {
798 int no_devices = 0;
799 int ret = 0;
800 unsigned long flags;
801
802 /* must be called with skt_mutex held */
803 ds_dbg(0, "re-scanning socket %d\n", skt->sock);
804
805 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
806 if (list_empty(&skt->devices_list))
807 no_devices = 1;
808 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
809
810 /* If this is because of a CIS override, start over */
811 if (new_cis && !no_devices)
812 pcmcia_card_remove(skt, NULL);
813
814 /* if no devices were added for this socket yet because of
815 * missing resource information or other trouble, we need to
816 * do this now. */
817 if (no_devices || new_cis) {
818 ret = pcmcia_card_add(skt);
819 if (ret)
820 return;
821 }
822
823 /* some device information might have changed because of a CIS
824 * update or because we can finally read it correctly... so
825 * determine it again, overwriting old values if necessary. */
826 bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery);
827
828 /* we re-scan all devices, not just the ones connected to this
829 * socket. This does not matter, though. */
830 ret = bus_rescan_devices(&pcmcia_bus_type);
831 if (ret)
832 printk(KERN_INFO "pcmcia: bus_rescan_devices failed\n");
833 }
834
835 #ifdef CONFIG_PCMCIA_LOAD_CIS
836
837 /**
838 * pcmcia_load_firmware - load CIS from userspace if device-provided is broken
839 * @dev - the pcmcia device which needs a CIS override
840 * @filename - requested filename in /lib/firmware/
841 *
842 * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if
843 * the one provided by the card is broken. The firmware files reside in
844 * /lib/firmware/ in userspace.
845 */
846 static int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
847 {
848 struct pcmcia_socket *s = dev->socket;
849 const struct firmware *fw;
850 char path[20];
851 int ret = -ENOMEM;
852 int no_funcs;
853 int old_funcs;
854 cisdump_t *cis;
855 cistpl_longlink_mfc_t mfc;
856
857 if (!filename)
858 return -EINVAL;
859
860 ds_dbg(1, "trying to load CIS file %s\n", filename);
861
862 if (strlen(filename) > 14) {
863 printk(KERN_WARNING "pcmcia: CIS filename is too long\n");
864 return -EINVAL;
865 }
866
867 snprintf(path, 20, "%s", filename);
868
869 if (request_firmware(&fw, path, &dev->dev) == 0) {
870 if (fw->size >= CISTPL_MAX_CIS_SIZE) {
871 ret = -EINVAL;
872 printk(KERN_ERR "pcmcia: CIS override is too big\n");
873 goto release;
874 }
875
876 cis = kzalloc(sizeof(cisdump_t), GFP_KERNEL);
877 if (!cis) {
878 ret = -ENOMEM;
879 goto release;
880 }
881
882 cis->Length = fw->size + 1;
883 memcpy(cis->Data, fw->data, fw->size);
884
885 if (!pcmcia_replace_cis(s, cis))
886 ret = 0;
887 else {
888 printk(KERN_ERR "pcmcia: CIS override failed\n");
889 goto release;
890 }
891
892
893 /* update information */
894 pcmcia_device_query(dev);
895
896 /* does this cis override add or remove functions? */
897 old_funcs = s->functions;
898
899 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
900 no_funcs = mfc.nfn;
901 else
902 no_funcs = 1;
903 s->functions = no_funcs;
904
905 if (old_funcs > no_funcs)
906 pcmcia_card_remove(s, dev);
907 else if (no_funcs > old_funcs)
908 pcmcia_add_device_later(s, 1);
909 }
910 release:
911 release_firmware(fw);
912
913 return (ret);
914 }
915
916 #else /* !CONFIG_PCMCIA_LOAD_CIS */
917
918 static inline int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
919 {
920 return -ENODEV;
921 }
922
923 #endif
924
925
926 static inline int pcmcia_devmatch(struct pcmcia_device *dev,
927 struct pcmcia_device_id *did)
928 {
929 if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
930 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
931 return 0;
932 }
933
934 if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
935 if ((!dev->has_card_id) || (dev->card_id != did->card_id))
936 return 0;
937 }
938
939 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
940 if (dev->func != did->function)
941 return 0;
942 }
943
944 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
945 if (!dev->prod_id[0])
946 return 0;
947 if (strcmp(did->prod_id[0], dev->prod_id[0]))
948 return 0;
949 }
950
951 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
952 if (!dev->prod_id[1])
953 return 0;
954 if (strcmp(did->prod_id[1], dev->prod_id[1]))
955 return 0;
956 }
957
958 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
959 if (!dev->prod_id[2])
960 return 0;
961 if (strcmp(did->prod_id[2], dev->prod_id[2]))
962 return 0;
963 }
964
965 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
966 if (!dev->prod_id[3])
967 return 0;
968 if (strcmp(did->prod_id[3], dev->prod_id[3]))
969 return 0;
970 }
971
972 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
973 if (dev->device_no != did->device_no)
974 return 0;
975 }
976
977 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
978 if ((!dev->has_func_id) || (dev->func_id != did->func_id))
979 return 0;
980
981 /* if this is a pseudo-multi-function device,
982 * we need explicit matches */
983 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO)
984 return 0;
985 if (dev->device_no)
986 return 0;
987
988 /* also, FUNC_ID matching needs to be activated by userspace
989 * after it has re-checked that there is no possible module
990 * with a prod_id/manf_id/card_id match.
991 */
992 ds_dbg(0, "skipping FUNC_ID match for %s until userspace "
993 "interaction\n", dev->dev.bus_id);
994 if (!dev->allow_func_id_match)
995 return 0;
996 }
997
998 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
999 ds_dbg(0, "device %s needs a fake CIS\n", dev->dev.bus_id);
1000 if (!dev->socket->fake_cis)
1001 pcmcia_load_firmware(dev, did->cisfile);
1002
1003 if (!dev->socket->fake_cis)
1004 return 0;
1005 }
1006
1007 if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
1008 int i;
1009 for (i=0; i<4; i++)
1010 if (dev->prod_id[i])
1011 return 0;
1012 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
1013 return 0;
1014 }
1015
1016 dev->dev.driver_data = (void *) did;
1017
1018 return 1;
1019 }
1020
1021
1022 static int pcmcia_bus_match(struct device * dev, struct device_driver * drv) {
1023 struct pcmcia_device * p_dev = to_pcmcia_dev(dev);
1024 struct pcmcia_driver * p_drv = to_pcmcia_drv(drv);
1025 struct pcmcia_device_id *did = p_drv->id_table;
1026 struct pcmcia_dynid *dynid;
1027
1028 /* match dynamic devices first */
1029 spin_lock(&p_drv->dynids.lock);
1030 list_for_each_entry(dynid, &p_drv->dynids.list, node) {
1031 ds_dbg(3, "trying to match %s to %s\n", dev->bus_id,
1032 drv->name);
1033 if (pcmcia_devmatch(p_dev, &dynid->id)) {
1034 ds_dbg(0, "matched %s to %s\n", dev->bus_id,
1035 drv->name);
1036 spin_unlock(&p_drv->dynids.lock);
1037 return 1;
1038 }
1039 }
1040 spin_unlock(&p_drv->dynids.lock);
1041
1042 #ifdef CONFIG_PCMCIA_IOCTL
1043 /* matching by cardmgr */
1044 if (p_dev->cardmgr == p_drv) {
1045 ds_dbg(0, "cardmgr matched %s to %s\n", dev->bus_id,
1046 drv->name);
1047 return 1;
1048 }
1049 #endif
1050
1051 while (did && did->match_flags) {
1052 ds_dbg(3, "trying to match %s to %s\n", dev->bus_id,
1053 drv->name);
1054 if (pcmcia_devmatch(p_dev, did)) {
1055 ds_dbg(0, "matched %s to %s\n", dev->bus_id,
1056 drv->name);
1057 return 1;
1058 }
1059 did++;
1060 }
1061
1062 return 0;
1063 }
1064
1065 #ifdef CONFIG_HOTPLUG
1066
1067 static int pcmcia_bus_uevent(struct device *dev, char **envp, int num_envp,
1068 char *buffer, int buffer_size)
1069 {
1070 struct pcmcia_device *p_dev;
1071 int i, length = 0;
1072 u32 hash[4] = { 0, 0, 0, 0};
1073
1074 if (!dev)
1075 return -ENODEV;
1076
1077 p_dev = to_pcmcia_dev(dev);
1078
1079 /* calculate hashes */
1080 for (i=0; i<4; i++) {
1081 if (!p_dev->prod_id[i])
1082 continue;
1083 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
1084 }
1085
1086 i = 0;
1087
1088 if (add_uevent_var(envp, num_envp, &i,
1089 buffer, buffer_size, &length,
1090 "SOCKET_NO=%u",
1091 p_dev->socket->sock))
1092 return -ENOMEM;
1093
1094 if (add_uevent_var(envp, num_envp, &i,
1095 buffer, buffer_size, &length,
1096 "DEVICE_NO=%02X",
1097 p_dev->device_no))
1098 return -ENOMEM;
1099
1100 if (add_uevent_var(envp, num_envp, &i,
1101 buffer, buffer_size, &length,
1102 "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
1103 "pa%08Xpb%08Xpc%08Xpd%08X",
1104 p_dev->has_manf_id ? p_dev->manf_id : 0,
1105 p_dev->has_card_id ? p_dev->card_id : 0,
1106 p_dev->has_func_id ? p_dev->func_id : 0,
1107 p_dev->func,
1108 p_dev->device_no,
1109 hash[0],
1110 hash[1],
1111 hash[2],
1112 hash[3]))
1113 return -ENOMEM;
1114
1115 envp[i] = NULL;
1116
1117 return 0;
1118 }
1119
1120 #else
1121
1122 static int pcmcia_bus_uevent(struct device *dev, char **envp, int num_envp,
1123 char *buffer, int buffer_size)
1124 {
1125 return -ENODEV;
1126 }
1127
1128 #endif
1129
1130 /************************ per-device sysfs output ***************************/
1131
1132 #define pcmcia_device_attr(field, test, format) \
1133 static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf) \
1134 { \
1135 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
1136 return p_dev->test ? sprintf (buf, format, p_dev->field) : -ENODEV; \
1137 }
1138
1139 #define pcmcia_device_stringattr(name, field) \
1140 static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf) \
1141 { \
1142 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
1143 return p_dev->field ? sprintf (buf, "%s\n", p_dev->field) : -ENODEV; \
1144 }
1145
1146 pcmcia_device_attr(func, socket, "0x%02x\n");
1147 pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
1148 pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
1149 pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
1150 pcmcia_device_stringattr(prod_id1, prod_id[0]);
1151 pcmcia_device_stringattr(prod_id2, prod_id[1]);
1152 pcmcia_device_stringattr(prod_id3, prod_id[2]);
1153 pcmcia_device_stringattr(prod_id4, prod_id[3]);
1154
1155
1156 static ssize_t pcmcia_show_pm_state(struct device *dev, struct device_attribute *attr, char *buf)
1157 {
1158 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1159
1160 if (p_dev->suspended)
1161 return sprintf(buf, "off\n");
1162 else
1163 return sprintf(buf, "on\n");
1164 }
1165
1166 static ssize_t pcmcia_store_pm_state(struct device *dev, struct device_attribute *attr,
1167 const char *buf, size_t count)
1168 {
1169 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1170 int ret = 0;
1171
1172 if (!count)
1173 return -EINVAL;
1174
1175 if ((!p_dev->suspended) && !strncmp(buf, "off", 3))
1176 ret = dpm_runtime_suspend(dev, PMSG_SUSPEND);
1177 else if (p_dev->suspended && !strncmp(buf, "on", 2))
1178 dpm_runtime_resume(dev);
1179
1180 return ret ? ret : count;
1181 }
1182
1183
1184 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1185 {
1186 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1187 int i;
1188 u32 hash[4] = { 0, 0, 0, 0};
1189
1190 /* calculate hashes */
1191 for (i=0; i<4; i++) {
1192 if (!p_dev->prod_id[i])
1193 continue;
1194 hash[i] = crc32(0,p_dev->prod_id[i],strlen(p_dev->prod_id[i]));
1195 }
1196 return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
1197 "pa%08Xpb%08Xpc%08Xpd%08X\n",
1198 p_dev->has_manf_id ? p_dev->manf_id : 0,
1199 p_dev->has_card_id ? p_dev->card_id : 0,
1200 p_dev->has_func_id ? p_dev->func_id : 0,
1201 p_dev->func, p_dev->device_no,
1202 hash[0], hash[1], hash[2], hash[3]);
1203 }
1204
1205 static ssize_t pcmcia_store_allow_func_id_match(struct device *dev,
1206 struct device_attribute *attr, const char *buf, size_t count)
1207 {
1208 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1209 int ret;
1210
1211 if (!count)
1212 return -EINVAL;
1213
1214 mutex_lock(&p_dev->socket->skt_mutex);
1215 p_dev->allow_func_id_match = 1;
1216 mutex_unlock(&p_dev->socket->skt_mutex);
1217
1218 ret = bus_rescan_devices(&pcmcia_bus_type);
1219 if (ret)
1220 printk(KERN_INFO "pcmcia: bus_rescan_devices failed after "
1221 "allowing func_id matches\n");
1222
1223 return count;
1224 }
1225
1226 static struct device_attribute pcmcia_dev_attrs[] = {
1227 __ATTR(function, 0444, func_show, NULL),
1228 __ATTR(pm_state, 0644, pcmcia_show_pm_state, pcmcia_store_pm_state),
1229 __ATTR_RO(func_id),
1230 __ATTR_RO(manf_id),
1231 __ATTR_RO(card_id),
1232 __ATTR_RO(prod_id1),
1233 __ATTR_RO(prod_id2),
1234 __ATTR_RO(prod_id3),
1235 __ATTR_RO(prod_id4),
1236 __ATTR_RO(modalias),
1237 __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match),
1238 __ATTR_NULL,
1239 };
1240
1241 /* PM support, also needed for reset */
1242
1243 static int pcmcia_dev_suspend(struct device * dev, pm_message_t state)
1244 {
1245 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1246 struct pcmcia_driver *p_drv = NULL;
1247 int ret = 0;
1248
1249 ds_dbg(2, "suspending %s\n", dev->bus_id);
1250
1251 if (dev->driver)
1252 p_drv = to_pcmcia_drv(dev->driver);
1253
1254 if (!p_drv)
1255 goto out;
1256
1257 if (p_drv->suspend) {
1258 ret = p_drv->suspend(p_dev);
1259 if (ret) {
1260 printk(KERN_ERR "pcmcia: device %s (driver %s) did "
1261 "not want to go to sleep (%d)\n",
1262 p_dev->devname, p_drv->drv.name, ret);
1263 goto out;
1264 }
1265 }
1266
1267 if (p_dev->device_no == p_dev->func) {
1268 ds_dbg(2, "releasing configuration for %s\n", dev->bus_id);
1269 pcmcia_release_configuration(p_dev);
1270 }
1271
1272 out:
1273 if (!ret)
1274 p_dev->suspended = 1;
1275 return ret;
1276 }
1277
1278
1279 static int pcmcia_dev_resume(struct device * dev)
1280 {
1281 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1282 struct pcmcia_driver *p_drv = NULL;
1283 int ret = 0;
1284
1285 ds_dbg(2, "resuming %s\n", dev->bus_id);
1286
1287 if (dev->driver)
1288 p_drv = to_pcmcia_drv(dev->driver);
1289
1290 if (!p_drv)
1291 goto out;
1292
1293 if (p_dev->device_no == p_dev->func) {
1294 ds_dbg(2, "requesting configuration for %s\n", dev->bus_id);
1295 ret = pcmcia_request_configuration(p_dev, &p_dev->conf);
1296 if (ret)
1297 goto out;
1298 }
1299
1300 if (p_drv->resume)
1301 ret = p_drv->resume(p_dev);
1302
1303 out:
1304 if (!ret)
1305 p_dev->suspended = 0;
1306 return ret;
1307 }
1308
1309
1310 static int pcmcia_bus_suspend_callback(struct device *dev, void * _data)
1311 {
1312 struct pcmcia_socket *skt = _data;
1313 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1314
1315 if (p_dev->socket != skt)
1316 return 0;
1317
1318 return dpm_runtime_suspend(dev, PMSG_SUSPEND);
1319 }
1320
1321 static int pcmcia_bus_resume_callback(struct device *dev, void * _data)
1322 {
1323 struct pcmcia_socket *skt = _data;
1324 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1325
1326 if (p_dev->socket != skt)
1327 return 0;
1328
1329 dpm_runtime_resume(dev);
1330
1331 return 0;
1332 }
1333
1334 static int pcmcia_bus_resume(struct pcmcia_socket *skt)
1335 {
1336 ds_dbg(2, "resuming socket %d\n", skt->sock);
1337 bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback);
1338 return 0;
1339 }
1340
1341 static int pcmcia_bus_suspend(struct pcmcia_socket *skt)
1342 {
1343 ds_dbg(2, "suspending socket %d\n", skt->sock);
1344 if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt,
1345 pcmcia_bus_suspend_callback)) {
1346 pcmcia_bus_resume(skt);
1347 return -EIO;
1348 }
1349 return 0;
1350 }
1351
1352
1353 /*======================================================================
1354
1355 The card status event handler.
1356
1357 ======================================================================*/
1358
1359 /* Normally, the event is passed to individual drivers after
1360 * informing userspace. Only for CS_EVENT_CARD_REMOVAL this
1361 * is inversed to maintain historic compatibility.
1362 */
1363
1364 static int ds_event(struct pcmcia_socket *skt, event_t event, int priority)
1365 {
1366 struct pcmcia_socket *s = pcmcia_get_socket(skt);
1367
1368 if (!s) {
1369 printk(KERN_ERR "PCMCIA obtaining reference to socket %p " \
1370 "failed, event 0x%x lost!\n", skt, event);
1371 return -ENODEV;
1372 }
1373
1374 ds_dbg(1, "ds_event(0x%06x, %d, 0x%p)\n",
1375 event, priority, skt);
1376
1377 switch (event) {
1378 case CS_EVENT_CARD_REMOVAL:
1379 s->pcmcia_state.present = 0;
1380 pcmcia_card_remove(skt, NULL);
1381 handle_event(skt, event);
1382 break;
1383
1384 case CS_EVENT_CARD_INSERTION:
1385 s->pcmcia_state.present = 1;
1386 pcmcia_card_add(skt);
1387 handle_event(skt, event);
1388 break;
1389
1390 case CS_EVENT_EJECTION_REQUEST:
1391 break;
1392
1393 case CS_EVENT_PM_SUSPEND:
1394 case CS_EVENT_PM_RESUME:
1395 case CS_EVENT_RESET_PHYSICAL:
1396 case CS_EVENT_CARD_RESET:
1397 default:
1398 handle_event(skt, event);
1399 break;
1400 }
1401
1402 pcmcia_put_socket(s);
1403
1404 return 0;
1405 } /* ds_event */
1406
1407
1408 struct pcmcia_device * pcmcia_dev_present(struct pcmcia_device *_p_dev)
1409 {
1410 struct pcmcia_device *p_dev;
1411 struct pcmcia_device *ret = NULL;
1412
1413 p_dev = pcmcia_get_dev(_p_dev);
1414 if (!p_dev)
1415 return NULL;
1416
1417 if (!p_dev->socket->pcmcia_state.present)
1418 goto out;
1419
1420 if (p_dev->_removed)
1421 goto out;
1422
1423 if (p_dev->suspended)
1424 goto out;
1425
1426 ret = p_dev;
1427 out:
1428 pcmcia_put_dev(p_dev);
1429 return ret;
1430 }
1431 EXPORT_SYMBOL(pcmcia_dev_present);
1432
1433
1434 static struct pcmcia_callback pcmcia_bus_callback = {
1435 .owner = THIS_MODULE,
1436 .event = ds_event,
1437 .requery = pcmcia_bus_rescan,
1438 .suspend = pcmcia_bus_suspend,
1439 .resume = pcmcia_bus_resume,
1440 };
1441
1442 static int __devinit pcmcia_bus_add_socket(struct device *dev,
1443 struct class_interface *class_intf)
1444 {
1445 struct pcmcia_socket *socket = dev_get_drvdata(dev);
1446 int ret;
1447
1448 socket = pcmcia_get_socket(socket);
1449 if (!socket) {
1450 printk(KERN_ERR "PCMCIA obtaining reference to socket %p failed\n", socket);
1451 return -ENODEV;
1452 }
1453
1454 /*
1455 * Ugly. But we want to wait for the socket threads to have started up.
1456 * We really should let the drivers themselves drive some of this..
1457 */
1458 msleep(250);
1459
1460 #ifdef CONFIG_PCMCIA_IOCTL
1461 init_waitqueue_head(&socket->queue);
1462 #endif
1463 INIT_LIST_HEAD(&socket->devices_list);
1464 INIT_WORK(&socket->device_add, pcmcia_delayed_add_device);
1465 memset(&socket->pcmcia_state, 0, sizeof(u8));
1466 socket->device_count = 0;
1467
1468 ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback);
1469 if (ret) {
1470 printk(KERN_ERR "PCMCIA registration PCCard core failed for socket %p\n", socket);
1471 pcmcia_put_socket(socket);
1472 return (ret);
1473 }
1474
1475 return 0;
1476 }
1477
1478 static void pcmcia_bus_remove_socket(struct device *dev,
1479 struct class_interface *class_intf)
1480 {
1481 struct pcmcia_socket *socket = dev_get_drvdata(dev);
1482
1483 if (!socket)
1484 return;
1485
1486 socket->pcmcia_state.dead = 1;
1487 pccard_register_pcmcia(socket, NULL);
1488
1489 /* unregister any unbound devices */
1490 mutex_lock(&socket->skt_mutex);
1491 pcmcia_card_remove(socket, NULL);
1492 mutex_unlock(&socket->skt_mutex);
1493
1494 pcmcia_put_socket(socket);
1495
1496 return;
1497 }
1498
1499
1500 /* the pcmcia_bus_interface is used to handle pcmcia socket devices */
1501 static struct class_interface pcmcia_bus_interface = {
1502 .class = &pcmcia_socket_class,
1503 .add_dev = &pcmcia_bus_add_socket,
1504 .remove_dev = &pcmcia_bus_remove_socket,
1505 };
1506
1507
1508 struct bus_type pcmcia_bus_type = {
1509 .name = "pcmcia",
1510 .uevent = pcmcia_bus_uevent,
1511 .match = pcmcia_bus_match,
1512 .dev_attrs = pcmcia_dev_attrs,
1513 .probe = pcmcia_device_probe,
1514 .remove = pcmcia_device_remove,
1515 .suspend = pcmcia_dev_suspend,
1516 .resume = pcmcia_dev_resume,
1517 };
1518
1519
1520 static int __init init_pcmcia_bus(void)
1521 {
1522 int ret;
1523
1524 spin_lock_init(&pcmcia_dev_list_lock);
1525
1526 ret = bus_register(&pcmcia_bus_type);
1527 if (ret < 0) {
1528 printk(KERN_WARNING "pcmcia: bus_register error: %d\n", ret);
1529 return ret;
1530 }
1531 ret = class_interface_register(&pcmcia_bus_interface);
1532 if (ret < 0) {
1533 printk(KERN_WARNING
1534 "pcmcia: class_interface_register error: %d\n", ret);
1535 bus_unregister(&pcmcia_bus_type);
1536 return ret;
1537 }
1538
1539 pcmcia_setup_ioctl();
1540
1541 return 0;
1542 }
1543 fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that
1544 * pcmcia_socket_class is already registered */
1545
1546
1547 static void __exit exit_pcmcia_bus(void)
1548 {
1549 pcmcia_cleanup_ioctl();
1550
1551 class_interface_unregister(&pcmcia_bus_interface);
1552
1553 bus_unregister(&pcmcia_bus_type);
1554 }
1555 module_exit(exit_pcmcia_bus);
1556
1557
1558 MODULE_ALIAS("ds");
linux v2.6.22.y-op