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pcmcia: fix kernel-doc comments
[pv_ops_mirror.git] / drivers / pcmcia / ds.c
blob5cf89a91da1ea275266da0a42d6dada7672e5466
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
28 #define IN_CARD_SERVICES
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 #include "ds_internal.h"
37
38 /*====================================================================*/
39
40 /* Module parameters */
41
42 MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
43 MODULE_DESCRIPTION("PCMCIA Driver Services");
44 MODULE_LICENSE("GPL");
45
46 #ifdef DEBUG
47 int ds_pc_debug;
48
49 module_param_named(pc_debug, ds_pc_debug, int, 0644);
50
51 #define ds_dbg(lvl, fmt, arg...) do { \
52 if (ds_pc_debug > (lvl)) \
53 printk(KERN_DEBUG "ds: " fmt , ## arg); \
54 } while (0)
55 #else
56 #define ds_dbg(lvl, fmt, arg...) do { } while (0)
57 #endif
58
59 spinlock_t pcmcia_dev_list_lock;
60
61 /*====================================================================*/
62
63 /* code which was in cs.c before */
64
65 /* String tables for error messages */
66
67 typedef struct lookup_t {
68 int key;
69 char *msg;
70 } lookup_t;
71
72 static const lookup_t error_table[] = {
73 { CS_SUCCESS, "Operation succeeded" },
74 { CS_BAD_ADAPTER, "Bad adapter" },
75 { CS_BAD_ATTRIBUTE, "Bad attribute", },
76 { CS_BAD_BASE, "Bad base address" },
77 { CS_BAD_EDC, "Bad EDC" },
78 { CS_BAD_IRQ, "Bad IRQ" },
79 { CS_BAD_OFFSET, "Bad offset" },
80 { CS_BAD_PAGE, "Bad page number" },
81 { CS_READ_FAILURE, "Read failure" },
82 { CS_BAD_SIZE, "Bad size" },
83 { CS_BAD_SOCKET, "Bad socket" },
84 { CS_BAD_TYPE, "Bad type" },
85 { CS_BAD_VCC, "Bad Vcc" },
86 { CS_BAD_VPP, "Bad Vpp" },
87 { CS_BAD_WINDOW, "Bad window" },
88 { CS_WRITE_FAILURE, "Write failure" },
89 { CS_NO_CARD, "No card present" },
90 { CS_UNSUPPORTED_FUNCTION, "Usupported function" },
91 { CS_UNSUPPORTED_MODE, "Unsupported mode" },
92 { CS_BAD_SPEED, "Bad speed" },
93 { CS_BUSY, "Resource busy" },
94 { CS_GENERAL_FAILURE, "General failure" },
95 { CS_WRITE_PROTECTED, "Write protected" },
96 { CS_BAD_ARG_LENGTH, "Bad argument length" },
97 { CS_BAD_ARGS, "Bad arguments" },
98 { CS_CONFIGURATION_LOCKED, "Configuration locked" },
99 { CS_IN_USE, "Resource in use" },
100 { CS_NO_MORE_ITEMS, "No more items" },
101 { CS_OUT_OF_RESOURCE, "Out of resource" },
102 { CS_BAD_HANDLE, "Bad handle" },
103 { CS_BAD_TUPLE, "Bad CIS tuple" }
104 };
105
106
107 static const lookup_t service_table[] = {
108 { AccessConfigurationRegister, "AccessConfigurationRegister" },
109 { AddSocketServices, "AddSocketServices" },
110 { AdjustResourceInfo, "AdjustResourceInfo" },
111 { CheckEraseQueue, "CheckEraseQueue" },
112 { CloseMemory, "CloseMemory" },
113 { DeregisterClient, "DeregisterClient" },
114 { DeregisterEraseQueue, "DeregisterEraseQueue" },
115 { GetCardServicesInfo, "GetCardServicesInfo" },
116 { GetClientInfo, "GetClientInfo" },
117 { GetConfigurationInfo, "GetConfigurationInfo" },
118 { GetEventMask, "GetEventMask" },
119 { GetFirstClient, "GetFirstClient" },
120 { GetFirstRegion, "GetFirstRegion" },
121 { GetFirstTuple, "GetFirstTuple" },
122 { GetNextClient, "GetNextClient" },
123 { GetNextRegion, "GetNextRegion" },
124 { GetNextTuple, "GetNextTuple" },
125 { GetStatus, "GetStatus" },
126 { GetTupleData, "GetTupleData" },
127 { MapMemPage, "MapMemPage" },
128 { ModifyConfiguration, "ModifyConfiguration" },
129 { ModifyWindow, "ModifyWindow" },
130 { OpenMemory, "OpenMemory" },
131 { ParseTuple, "ParseTuple" },
132 { ReadMemory, "ReadMemory" },
133 { RegisterClient, "RegisterClient" },
134 { RegisterEraseQueue, "RegisterEraseQueue" },
135 { RegisterMTD, "RegisterMTD" },
136 { ReleaseConfiguration, "ReleaseConfiguration" },
137 { ReleaseIO, "ReleaseIO" },
138 { ReleaseIRQ, "ReleaseIRQ" },
139 { ReleaseWindow, "ReleaseWindow" },
140 { RequestConfiguration, "RequestConfiguration" },
141 { RequestIO, "RequestIO" },
142 { RequestIRQ, "RequestIRQ" },
143 { RequestSocketMask, "RequestSocketMask" },
144 { RequestWindow, "RequestWindow" },
145 { ResetCard, "ResetCard" },
146 { SetEventMask, "SetEventMask" },
147 { ValidateCIS, "ValidateCIS" },
148 { WriteMemory, "WriteMemory" },
149 { BindDevice, "BindDevice" },
150 { BindMTD, "BindMTD" },
151 { ReportError, "ReportError" },
152 { SuspendCard, "SuspendCard" },
153 { ResumeCard, "ResumeCard" },
154 { EjectCard, "EjectCard" },
155 { InsertCard, "InsertCard" },
156 { ReplaceCIS, "ReplaceCIS" }
157 };
158
159
160 static int pcmcia_report_error(struct pcmcia_device *p_dev, error_info_t *err)
161 {
162 int i;
163 char *serv;
164
165 if (!p_dev)
166 printk(KERN_NOTICE);
167 else
168 printk(KERN_NOTICE "%s: ", p_dev->dev.bus_id);
169
170 for (i = 0; i < ARRAY_SIZE(service_table); i++)
171 if (service_table[i].key == err->func)
172 break;
173 if (i < ARRAY_SIZE(service_table))
174 serv = service_table[i].msg;
175 else
176 serv = "Unknown service number";
177
178 for (i = 0; i < ARRAY_SIZE(error_table); i++)
179 if (error_table[i].key == err->retcode)
180 break;
181 if (i < ARRAY_SIZE(error_table))
182 printk("%s: %s\n", serv, error_table[i].msg);
183 else
184 printk("%s: Unknown error code %#x\n", serv, err->retcode);
185
186 return CS_SUCCESS;
187 } /* report_error */
188
189 /* end of code which was in cs.c before */
190
191 /*======================================================================*/
192
193 void cs_error(struct pcmcia_device *p_dev, int func, int ret)
194 {
195 error_info_t err = { func, ret };
196 pcmcia_report_error(p_dev, &err);
197 }
198 EXPORT_SYMBOL(cs_error);
199
200
201 static void pcmcia_check_driver(struct pcmcia_driver *p_drv)
202 {
203 struct pcmcia_device_id *did = p_drv->id_table;
204 unsigned int i;
205 u32 hash;
206
207 if (!p_drv->probe || !p_drv->remove)
208 printk(KERN_DEBUG "pcmcia: %s lacks a requisite callback "
209 "function\n", p_drv->drv.name);
210
211 while (did && did->match_flags) {
212 for (i=0; i<4; i++) {
213 if (!did->prod_id[i])
214 continue;
215
216 hash = crc32(0, did->prod_id[i], strlen(did->prod_id[i]));
217 if (hash == did->prod_id_hash[i])
218 continue;
219
220 printk(KERN_DEBUG "pcmcia: %s: invalid hash for "
221 "product string \"%s\": is 0x%x, should "
222 "be 0x%x\n", p_drv->drv.name, did->prod_id[i],
223 did->prod_id_hash[i], hash);
224 printk(KERN_DEBUG "pcmcia: see "
225 "Documentation/pcmcia/devicetable.txt for "
226 "details\n");
227 }
228 did++;
229 }
230
231 return;
232 }
233
234
235 /*======================================================================*/
236
237
238 struct pcmcia_dynid {
239 struct list_head node;
240 struct pcmcia_device_id id;
241 };
242
243 /**
244 * pcmcia_store_new_id - add a new PCMCIA device ID to this driver and re-probe devices
245 * @driver: target device driver
246 * @buf: buffer for scanning device ID data
247 * @count: input size
248 *
249 * Adds a new dynamic PCMCIA device ID to this driver,
250 * and causes the driver to probe for all devices again.
251 */
252 static ssize_t
253 pcmcia_store_new_id(struct device_driver *driver, const char *buf, size_t count)
254 {
255 struct pcmcia_dynid *dynid;
256 struct pcmcia_driver *pdrv = to_pcmcia_drv(driver);
257 __u16 match_flags, manf_id, card_id;
258 __u8 func_id, function, device_no;
259 __u32 prod_id_hash[4] = {0, 0, 0, 0};
260 int fields=0;
261 int retval = 0;
262
263 fields = sscanf(buf, "%hx %hx %hx %hhx %hhx %hhx %x %x %x %x",
264 &match_flags, &manf_id, &card_id, &func_id, &function, &device_no,
265 &prod_id_hash[0], &prod_id_hash[1], &prod_id_hash[2], &prod_id_hash[3]);
266 if (fields < 6)
267 return -EINVAL;
268
269 dynid = kzalloc(sizeof(struct pcmcia_dynid), GFP_KERNEL);
270 if (!dynid)
271 return -ENOMEM;
272
273 INIT_LIST_HEAD(&dynid->node);
274 dynid->id.match_flags = match_flags;
275 dynid->id.manf_id = manf_id;
276 dynid->id.card_id = card_id;
277 dynid->id.func_id = func_id;
278 dynid->id.function = function;
279 dynid->id.device_no = device_no;
280 memcpy(dynid->id.prod_id_hash, prod_id_hash, sizeof(__u32) * 4);
281
282 spin_lock(&pdrv->dynids.lock);
283 list_add_tail(&pdrv->dynids.list, &dynid->node);
284 spin_unlock(&pdrv->dynids.lock);
285
286 if (get_driver(&pdrv->drv)) {
287 retval = driver_attach(&pdrv->drv);
288 put_driver(&pdrv->drv);
289 }
290
291 if (retval)
292 return retval;
293 return count;
294 }
295 static DRIVER_ATTR(new_id, S_IWUSR, NULL, pcmcia_store_new_id);
296
297 static void
298 pcmcia_free_dynids(struct pcmcia_driver *drv)
299 {
300 struct pcmcia_dynid *dynid, *n;
301
302 spin_lock(&drv->dynids.lock);
303 list_for_each_entry_safe(dynid, n, &drv->dynids.list, node) {
304 list_del(&dynid->node);
305 kfree(dynid);
306 }
307 spin_unlock(&drv->dynids.lock);
308 }
309
310 static int
311 pcmcia_create_newid_file(struct pcmcia_driver *drv)
312 {
313 int error = 0;
314 if (drv->probe != NULL)
315 error = sysfs_create_file(&drv->drv.kobj,
316 &driver_attr_new_id.attr);
317 return error;
318 }
319
320
321 /**
322 * pcmcia_register_driver - register a PCMCIA driver with the bus core
323 * @driver: the &driver being registered
324 *
325 * Registers a PCMCIA driver with the PCMCIA bus core.
326 */
327 int pcmcia_register_driver(struct pcmcia_driver *driver)
328 {
329 int error;
330
331 if (!driver)
332 return -EINVAL;
333
334 pcmcia_check_driver(driver);
335
336 /* initialize common fields */
337 driver->drv.bus = &pcmcia_bus_type;
338 driver->drv.owner = driver->owner;
339 spin_lock_init(&driver->dynids.lock);
340 INIT_LIST_HEAD(&driver->dynids.list);
341
342 ds_dbg(3, "registering driver %s\n", driver->drv.name);
343
344 error = driver_register(&driver->drv);
345 if (error < 0)
346 return error;
347
348 error = pcmcia_create_newid_file(driver);
349 if (error)
350 driver_unregister(&driver->drv);
351
352 return error;
353 }
354 EXPORT_SYMBOL(pcmcia_register_driver);
355
356 /**
357 * pcmcia_unregister_driver - unregister a PCMCIA driver with the bus core
358 * @driver: the &driver being unregistered
359 */
360 void pcmcia_unregister_driver(struct pcmcia_driver *driver)
361 {
362 ds_dbg(3, "unregistering driver %s\n", driver->drv.name);
363 driver_unregister(&driver->drv);
364 pcmcia_free_dynids(driver);
365 }
366 EXPORT_SYMBOL(pcmcia_unregister_driver);
367
368
369 /* pcmcia_device handling */
370
371 struct pcmcia_device * pcmcia_get_dev(struct pcmcia_device *p_dev)
372 {
373 struct device *tmp_dev;
374 tmp_dev = get_device(&p_dev->dev);
375 if (!tmp_dev)
376 return NULL;
377 return to_pcmcia_dev(tmp_dev);
378 }
379
380 void pcmcia_put_dev(struct pcmcia_device *p_dev)
381 {
382 if (p_dev)
383 put_device(&p_dev->dev);
384 }
385
386 static void pcmcia_release_function(struct kref *ref)
387 {
388 struct config_t *c = container_of(ref, struct config_t, ref);
389 ds_dbg(1, "releasing config_t\n");
390 kfree(c);
391 }
392
393 static void pcmcia_release_dev(struct device *dev)
394 {
395 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
396 ds_dbg(1, "releasing device %s\n", p_dev->dev.bus_id);
397 pcmcia_put_socket(p_dev->socket);
398 kfree(p_dev->devname);
399 kref_put(&p_dev->function_config->ref, pcmcia_release_function);
400 kfree(p_dev);
401 }
402
403 static void pcmcia_add_device_later(struct pcmcia_socket *s, int mfc)
404 {
405 if (!s->pcmcia_state.device_add_pending) {
406 ds_dbg(1, "scheduling to add %s secondary"
407 " device to %d\n", mfc ? "mfc" : "pfc", s->sock);
408 s->pcmcia_state.device_add_pending = 1;
409 s->pcmcia_state.mfc_pfc = mfc;
410 schedule_work(&s->device_add);
411 }
412 return;
413 }
414
415 static int pcmcia_device_probe(struct device * dev)
416 {
417 struct pcmcia_device *p_dev;
418 struct pcmcia_driver *p_drv;
419 struct pcmcia_device_id *did;
420 struct pcmcia_socket *s;
421 cistpl_config_t cis_config;
422 int ret = 0;
423
424 dev = get_device(dev);
425 if (!dev)
426 return -ENODEV;
427
428 p_dev = to_pcmcia_dev(dev);
429 p_drv = to_pcmcia_drv(dev->driver);
430 s = p_dev->socket;
431
432 ds_dbg(1, "trying to bind %s to %s\n", p_dev->dev.bus_id,
433 p_drv->drv.name);
434
435 if ((!p_drv->probe) || (!p_dev->function_config) ||
436 (!try_module_get(p_drv->owner))) {
437 ret = -EINVAL;
438 goto put_dev;
439 }
440
441 /* set up some more device information */
442 ret = pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_CONFIG,
443 &cis_config);
444 if (!ret) {
445 p_dev->conf.ConfigBase = cis_config.base;
446 p_dev->conf.Present = cis_config.rmask[0];
447 } else {
448 printk(KERN_INFO "pcmcia: could not parse base and rmask0 of CIS\n");
449 p_dev->conf.ConfigBase = 0;
450 p_dev->conf.Present = 0;
451 }
452
453 ret = p_drv->probe(p_dev);
454 if (ret) {
455 ds_dbg(1, "binding %s to %s failed with %d\n",
456 p_dev->dev.bus_id, p_drv->drv.name, ret);
457 goto put_module;
458 }
459
460 /* handle pseudo multifunction devices:
461 * there are at most two pseudo multifunction devices.
462 * if we're matching against the first, schedule a
463 * call which will then check whether there are two
464 * pseudo devices, and if not, add the second one.
465 */
466 did = p_dev->dev.driver_data;
467 if (did && (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) &&
468 (p_dev->socket->device_count == 1) && (p_dev->device_no == 0))
469 pcmcia_add_device_later(p_dev->socket, 0);
470
471 put_module:
472 if (ret)
473 module_put(p_drv->owner);
474 put_dev:
475 if (ret)
476 put_device(dev);
477 return (ret);
478 }
479
480
481 /*
482 * Removes a PCMCIA card from the device tree and socket list.
483 */
484 static void pcmcia_card_remove(struct pcmcia_socket *s, struct pcmcia_device *leftover)
485 {
486 struct pcmcia_device *p_dev;
487 struct pcmcia_device *tmp;
488 unsigned long flags;
489
490 ds_dbg(2, "pcmcia_card_remove(%d) %s\n", s->sock,
491 leftover ? leftover->devname : "");
492
493 if (!leftover)
494 s->device_count = 0;
495 else
496 s->device_count = 1;
497
498 /* unregister all pcmcia_devices registered with this socket, except leftover */
499 list_for_each_entry_safe(p_dev, tmp, &s->devices_list, socket_device_list) {
500 if (p_dev == leftover)
501 continue;
502
503 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
504 list_del(&p_dev->socket_device_list);
505 p_dev->_removed=1;
506 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
507
508 ds_dbg(2, "unregistering device %s\n", p_dev->dev.bus_id);
509 device_unregister(&p_dev->dev);
510 }
511
512 return;
513 }
514
515 static int pcmcia_device_remove(struct device * dev)
516 {
517 struct pcmcia_device *p_dev;
518 struct pcmcia_driver *p_drv;
519 struct pcmcia_device_id *did;
520 int i;
521
522 p_dev = to_pcmcia_dev(dev);
523 p_drv = to_pcmcia_drv(dev->driver);
524
525 ds_dbg(1, "removing device %s\n", p_dev->dev.bus_id);
526
527 /* If we're removing the primary module driving a
528 * pseudo multi-function card, we need to unbind
529 * all devices
530 */
531 did = p_dev->dev.driver_data;
532 if (did && (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) &&
533 (p_dev->socket->device_count != 0) &&
534 (p_dev->device_no == 0))
535 pcmcia_card_remove(p_dev->socket, p_dev);
536
537 /* detach the "instance" */
538 if (!p_drv)
539 return 0;
540
541 if (p_drv->remove)
542 p_drv->remove(p_dev);
543
544 p_dev->dev_node = NULL;
545
546 /* check for proper unloading */
547 if (p_dev->_irq || p_dev->_io || p_dev->_locked)
548 printk(KERN_INFO "pcmcia: driver %s did not release config properly\n",
549 p_drv->drv.name);
550
551 for (i = 0; i < MAX_WIN; i++)
552 if (p_dev->_win & CLIENT_WIN_REQ(i))
553 printk(KERN_INFO "pcmcia: driver %s did not release windows properly\n",
554 p_drv->drv.name);
555
556 /* references from pcmcia_probe_device */
557 pcmcia_put_dev(p_dev);
558 module_put(p_drv->owner);
559
560 return 0;
561 }
562
563
564 /*
565 * pcmcia_device_query -- determine information about a pcmcia device
566 */
567 static int pcmcia_device_query(struct pcmcia_device *p_dev)
568 {
569 cistpl_manfid_t manf_id;
570 cistpl_funcid_t func_id;
571 cistpl_vers_1_t *vers1;
572 unsigned int i;
573
574 vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL);
575 if (!vers1)
576 return -ENOMEM;
577
578 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
579 CISTPL_MANFID, &manf_id)) {
580 p_dev->manf_id = manf_id.manf;
581 p_dev->card_id = manf_id.card;
582 p_dev->has_manf_id = 1;
583 p_dev->has_card_id = 1;
584 }
585
586 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
587 CISTPL_FUNCID, &func_id)) {
588 p_dev->func_id = func_id.func;
589 p_dev->has_func_id = 1;
590 } else {
591 /* rule of thumb: cards with no FUNCID, but with
592 * common memory device geometry information, are
593 * probably memory cards (from pcmcia-cs) */
594 cistpl_device_geo_t *devgeo;
595
596 devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL);
597 if (!devgeo) {
598 kfree(vers1);
599 return -ENOMEM;
600 }
601 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
602 CISTPL_DEVICE_GEO, devgeo)) {
603 ds_dbg(0, "mem device geometry probably means "
604 "FUNCID_MEMORY\n");
605 p_dev->func_id = CISTPL_FUNCID_MEMORY;
606 p_dev->has_func_id = 1;
607 }
608 kfree(devgeo);
609 }
610
611 if (!pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_VERS_1,
612 vers1)) {
613 for (i=0; i < vers1->ns; i++) {
614 char *tmp;
615 unsigned int length;
616
617 tmp = vers1->str + vers1->ofs[i];
618
619 length = strlen(tmp) + 1;
620 if ((length < 2) || (length > 255))
621 continue;
622
623 p_dev->prod_id[i] = kmalloc(sizeof(char) * length,
624 GFP_KERNEL);
625 if (!p_dev->prod_id[i])
626 continue;
627
628 p_dev->prod_id[i] = strncpy(p_dev->prod_id[i],
629 tmp, length);
630 }
631 }
632
633 kfree(vers1);
634 return 0;
635 }
636
637
638 /* device_add_lock is needed to avoid double registration by cardmgr and kernel.
639 * Serializes pcmcia_device_add; will most likely be removed in future.
640 *
641 * While it has the caveat that adding new PCMCIA devices inside(!) device_register()
642 * won't work, this doesn't matter much at the moment: the driver core doesn't
643 * support it either.
644 */
645 static DEFINE_MUTEX(device_add_lock);
646
647 struct pcmcia_device * pcmcia_device_add(struct pcmcia_socket *s, unsigned int function)
648 {
649 struct pcmcia_device *p_dev, *tmp_dev;
650 unsigned long flags;
651 int bus_id_len;
652
653 s = pcmcia_get_socket(s);
654 if (!s)
655 return NULL;
656
657 mutex_lock(&device_add_lock);
658
659 ds_dbg(3, "adding device to %d, function %d\n", s->sock, function);
660
661 /* max of 4 devices per card */
662 if (s->device_count == 4)
663 goto err_put;
664
665 p_dev = kzalloc(sizeof(struct pcmcia_device), GFP_KERNEL);
666 if (!p_dev)
667 goto err_put;
668
669 p_dev->socket = s;
670 p_dev->device_no = (s->device_count++);
671 p_dev->func = function;
672
673 p_dev->dev.bus = &pcmcia_bus_type;
674 p_dev->dev.parent = s->dev.parent;
675 p_dev->dev.release = pcmcia_release_dev;
676 /* by default don't allow DMA */
677 p_dev->dma_mask = DMA_MASK_NONE;
678 p_dev->dev.dma_mask = &p_dev->dma_mask;
679 bus_id_len = sprintf (p_dev->dev.bus_id, "%d.%d", p_dev->socket->sock, p_dev->device_no);
680
681 p_dev->devname = kmalloc(6 + bus_id_len + 1, GFP_KERNEL);
682 if (!p_dev->devname)
683 goto err_free;
684 sprintf (p_dev->devname, "pcmcia%s", p_dev->dev.bus_id);
685 ds_dbg(3, "devname is %s\n", p_dev->devname);
686
687 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
688
689 /*
690 * p_dev->function_config must be the same for all card functions.
691 * Note that this is serialized by the device_add_lock, so that
692 * only one such struct will be created.
693 */
694 list_for_each_entry(tmp_dev, &s->devices_list, socket_device_list)
695 if (p_dev->func == tmp_dev->func) {
696 p_dev->function_config = tmp_dev->function_config;
697 kref_get(&p_dev->function_config->ref);
698 }
699
700 /* Add to the list in pcmcia_bus_socket */
701 list_add(&p_dev->socket_device_list, &s->devices_list);
702
703 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
704
705 if (!p_dev->function_config) {
706 ds_dbg(3, "creating config_t for %s\n", p_dev->dev.bus_id);
707 p_dev->function_config = kzalloc(sizeof(struct config_t),
708 GFP_KERNEL);
709 if (!p_dev->function_config)
710 goto err_unreg;
711 kref_init(&p_dev->function_config->ref);
712 }
713
714 printk(KERN_NOTICE "pcmcia: registering new device %s\n",
715 p_dev->devname);
716
717 pcmcia_device_query(p_dev);
718
719 if (device_register(&p_dev->dev))
720 goto err_unreg;
721
722 mutex_unlock(&device_add_lock);
723
724 return p_dev;
725
726 err_unreg:
727 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
728 list_del(&p_dev->socket_device_list);
729 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
730
731 err_free:
732 kfree(p_dev->devname);
733 kfree(p_dev);
734 s->device_count--;
735 err_put:
736 mutex_unlock(&device_add_lock);
737 pcmcia_put_socket(s);
738
739 return NULL;
740 }
741
742
743 static int pcmcia_card_add(struct pcmcia_socket *s)
744 {
745 cisinfo_t cisinfo;
746 cistpl_longlink_mfc_t mfc;
747 unsigned int no_funcs, i;
748 int ret = 0;
749
750 if (!(s->resource_setup_done)) {
751 ds_dbg(3, "no resources available, delaying card_add\n");
752 return -EAGAIN; /* try again, but later... */
753 }
754
755 if (pcmcia_validate_mem(s)) {
756 ds_dbg(3, "validating mem resources failed, "
757 "delaying card_add\n");
758 return -EAGAIN; /* try again, but later... */
759 }
760
761 ret = pccard_validate_cis(s, BIND_FN_ALL, &cisinfo);
762 if (ret || !cisinfo.Chains) {
763 ds_dbg(0, "invalid CIS or invalid resources\n");
764 return -ENODEV;
765 }
766
767 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
768 no_funcs = mfc.nfn;
769 else
770 no_funcs = 1;
771 s->functions = no_funcs;
772
773 for (i=0; i < no_funcs; i++)
774 pcmcia_device_add(s, i);
775
776 return (ret);
777 }
778
779
780 static void pcmcia_delayed_add_device(struct work_struct *work)
781 {
782 struct pcmcia_socket *s =
783 container_of(work, struct pcmcia_socket, device_add);
784 ds_dbg(1, "adding additional device to %d\n", s->sock);
785 pcmcia_device_add(s, s->pcmcia_state.mfc_pfc);
786 s->pcmcia_state.device_add_pending = 0;
787 s->pcmcia_state.mfc_pfc = 0;
788 }
789
790 static int pcmcia_requery(struct device *dev, void * _data)
791 {
792 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
793 if (!p_dev->dev.driver) {
794 ds_dbg(1, "update device information for %s\n",
795 p_dev->dev.bus_id);
796 pcmcia_device_query(p_dev);
797 }
798
799 return 0;
800 }
801
802 static void pcmcia_bus_rescan(struct pcmcia_socket *skt, int new_cis)
803 {
804 int no_devices = 0;
805 int ret = 0;
806 unsigned long flags;
807
808 /* must be called with skt_mutex held */
809 ds_dbg(0, "re-scanning socket %d\n", skt->sock);
810
811 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
812 if (list_empty(&skt->devices_list))
813 no_devices = 1;
814 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
815
816 /* If this is because of a CIS override, start over */
817 if (new_cis && !no_devices)
818 pcmcia_card_remove(skt, NULL);
819
820 /* if no devices were added for this socket yet because of
821 * missing resource information or other trouble, we need to
822 * do this now. */
823 if (no_devices || new_cis) {
824 ret = pcmcia_card_add(skt);
825 if (ret)
826 return;
827 }
828
829 /* some device information might have changed because of a CIS
830 * update or because we can finally read it correctly... so
831 * determine it again, overwriting old values if necessary. */
832 bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery);
833
834 /* we re-scan all devices, not just the ones connected to this
835 * socket. This does not matter, though. */
836 ret = bus_rescan_devices(&pcmcia_bus_type);
837 if (ret)
838 printk(KERN_INFO "pcmcia: bus_rescan_devices failed\n");
839 }
840
841 #ifdef CONFIG_PCMCIA_LOAD_CIS
842
843 /**
844 * pcmcia_load_firmware - load CIS from userspace if device-provided is broken
845 * @dev: the pcmcia device which needs a CIS override
846 * @filename: requested filename in /lib/firmware/
847 *
848 * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if
849 * the one provided by the card is broken. The firmware files reside in
850 * /lib/firmware/ in userspace.
851 */
852 static int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
853 {
854 struct pcmcia_socket *s = dev->socket;
855 const struct firmware *fw;
856 char path[20];
857 int ret = -ENOMEM;
858 int no_funcs;
859 int old_funcs;
860 cisdump_t *cis;
861 cistpl_longlink_mfc_t mfc;
862
863 if (!filename)
864 return -EINVAL;
865
866 ds_dbg(1, "trying to load CIS file %s\n", filename);
867
868 if (strlen(filename) > 14) {
869 printk(KERN_WARNING "pcmcia: CIS filename is too long\n");
870 return -EINVAL;
871 }
872
873 snprintf(path, 20, "%s", filename);
874
875 if (request_firmware(&fw, path, &dev->dev) == 0) {
876 if (fw->size >= CISTPL_MAX_CIS_SIZE) {
877 ret = -EINVAL;
878 printk(KERN_ERR "pcmcia: CIS override is too big\n");
879 goto release;
880 }
881
882 cis = kzalloc(sizeof(cisdump_t), GFP_KERNEL);
883 if (!cis) {
884 ret = -ENOMEM;
885 goto release;
886 }
887
888 cis->Length = fw->size + 1;
889 memcpy(cis->Data, fw->data, fw->size);
890
891 if (!pcmcia_replace_cis(s, cis))
892 ret = 0;
893 else {
894 printk(KERN_ERR "pcmcia: CIS override failed\n");
895 goto release;
896 }
897
898
899 /* update information */
900 pcmcia_device_query(dev);
901
902 /* does this cis override add or remove functions? */
903 old_funcs = s->functions;
904
905 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
906 no_funcs = mfc.nfn;
907 else
908 no_funcs = 1;
909 s->functions = no_funcs;
910
911 if (old_funcs > no_funcs)
912 pcmcia_card_remove(s, dev);
913 else if (no_funcs > old_funcs)
914 pcmcia_add_device_later(s, 1);
915 }
916 release:
917 release_firmware(fw);
918
919 return (ret);
920 }
921
922 #else /* !CONFIG_PCMCIA_LOAD_CIS */
923
924 static inline int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
925 {
926 return -ENODEV;
927 }
928
929 #endif
930
931
932 static inline int pcmcia_devmatch(struct pcmcia_device *dev,
933 struct pcmcia_device_id *did)
934 {
935 if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
936 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
937 return 0;
938 }
939
940 if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
941 if ((!dev->has_card_id) || (dev->card_id != did->card_id))
942 return 0;
943 }
944
945 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
946 if (dev->func != did->function)
947 return 0;
948 }
949
950 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
951 if (!dev->prod_id[0])
952 return 0;
953 if (strcmp(did->prod_id[0], dev->prod_id[0]))
954 return 0;
955 }
956
957 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
958 if (!dev->prod_id[1])
959 return 0;
960 if (strcmp(did->prod_id[1], dev->prod_id[1]))
961 return 0;
962 }
963
964 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
965 if (!dev->prod_id[2])
966 return 0;
967 if (strcmp(did->prod_id[2], dev->prod_id[2]))
968 return 0;
969 }
970
971 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
972 if (!dev->prod_id[3])
973 return 0;
974 if (strcmp(did->prod_id[3], dev->prod_id[3]))
975 return 0;
976 }
977
978 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
979 if (dev->device_no != did->device_no)
980 return 0;
981 }
982
983 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
984 if ((!dev->has_func_id) || (dev->func_id != did->func_id))
985 return 0;
986
987 /* if this is a pseudo-multi-function device,
988 * we need explicit matches */
989 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO)
990 return 0;
991 if (dev->device_no)
992 return 0;
993
994 /* also, FUNC_ID matching needs to be activated by userspace
995 * after it has re-checked that there is no possible module
996 * with a prod_id/manf_id/card_id match.
997 */
998 ds_dbg(0, "skipping FUNC_ID match for %s until userspace "
999 "interaction\n", dev->dev.bus_id);
1000 if (!dev->allow_func_id_match)
1001 return 0;
1002 }
1003
1004 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
1005 ds_dbg(0, "device %s needs a fake CIS\n", dev->dev.bus_id);
1006 if (!dev->socket->fake_cis)
1007 pcmcia_load_firmware(dev, did->cisfile);
1008
1009 if (!dev->socket->fake_cis)
1010 return 0;
1011 }
1012
1013 if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
1014 int i;
1015 for (i=0; i<4; i++)
1016 if (dev->prod_id[i])
1017 return 0;
1018 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
1019 return 0;
1020 }
1021
1022 dev->dev.driver_data = (void *) did;
1023
1024 return 1;
1025 }
1026
1027
1028 static int pcmcia_bus_match(struct device * dev, struct device_driver * drv) {
1029 struct pcmcia_device * p_dev = to_pcmcia_dev(dev);
1030 struct pcmcia_driver * p_drv = to_pcmcia_drv(drv);
1031 struct pcmcia_device_id *did = p_drv->id_table;
1032 struct pcmcia_dynid *dynid;
1033
1034 /* match dynamic devices first */
1035 spin_lock(&p_drv->dynids.lock);
1036 list_for_each_entry(dynid, &p_drv->dynids.list, node) {
1037 ds_dbg(3, "trying to match %s to %s\n", dev->bus_id,
1038 drv->name);
1039 if (pcmcia_devmatch(p_dev, &dynid->id)) {
1040 ds_dbg(0, "matched %s to %s\n", dev->bus_id,
1041 drv->name);
1042 spin_unlock(&p_drv->dynids.lock);
1043 return 1;
1044 }
1045 }
1046 spin_unlock(&p_drv->dynids.lock);
1047
1048 #ifdef CONFIG_PCMCIA_IOCTL
1049 /* matching by cardmgr */
1050 if (p_dev->cardmgr == p_drv) {
1051 ds_dbg(0, "cardmgr matched %s to %s\n", dev->bus_id,
1052 drv->name);
1053 return 1;
1054 }
1055 #endif
1056
1057 while (did && did->match_flags) {
1058 ds_dbg(3, "trying to match %s to %s\n", dev->bus_id,
1059 drv->name);
1060 if (pcmcia_devmatch(p_dev, did)) {
1061 ds_dbg(0, "matched %s to %s\n", dev->bus_id,
1062 drv->name);
1063 return 1;
1064 }
1065 did++;
1066 }
1067
1068 return 0;
1069 }
1070
1071 #ifdef CONFIG_HOTPLUG
1072
1073 static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
1074 {
1075 struct pcmcia_device *p_dev;
1076 int i;
1077 u32 hash[4] = { 0, 0, 0, 0};
1078
1079 if (!dev)
1080 return -ENODEV;
1081
1082 p_dev = to_pcmcia_dev(dev);
1083
1084 /* calculate hashes */
1085 for (i=0; i<4; i++) {
1086 if (!p_dev->prod_id[i])
1087 continue;
1088 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
1089 }
1090
1091 if (add_uevent_var(env, "SOCKET_NO=%u", p_dev->socket->sock))
1092 return -ENOMEM;
1093
1094 if (add_uevent_var(env, "DEVICE_NO=%02X", p_dev->device_no))
1095 return -ENOMEM;
1096
1097 if (add_uevent_var(env, "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
1098 "pa%08Xpb%08Xpc%08Xpd%08X",
1099 p_dev->has_manf_id ? p_dev->manf_id : 0,
1100 p_dev->has_card_id ? p_dev->card_id : 0,
1101 p_dev->has_func_id ? p_dev->func_id : 0,
1102 p_dev->func,
1103 p_dev->device_no,
1104 hash[0],
1105 hash[1],
1106 hash[2],
1107 hash[3]))
1108 return -ENOMEM;
1109
1110 return 0;
1111 }
1112
1113 #else
1114
1115 static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
1116 {
1117 return -ENODEV;
1118 }
1119
1120 #endif
1121
1122 /************************ runtime PM support ***************************/
1123
1124 static int pcmcia_dev_suspend(struct device *dev, pm_message_t state);
1125 static int pcmcia_dev_resume(struct device *dev);
1126
1127 static int runtime_suspend(struct device *dev)
1128 {
1129 int rc;
1130
1131 down(&dev->sem);
1132 rc = pcmcia_dev_suspend(dev, PMSG_SUSPEND);
1133 up(&dev->sem);
1134 if (!rc)
1135 dev->power.power_state.event = PM_EVENT_SUSPEND;
1136 return rc;
1137 }
1138
1139 static void runtime_resume(struct device *dev)
1140 {
1141 int rc;
1142
1143 down(&dev->sem);
1144 rc = pcmcia_dev_resume(dev);
1145 up(&dev->sem);
1146 if (!rc)
1147 dev->power.power_state.event = PM_EVENT_ON;
1148 }
1149
1150 /************************ per-device sysfs output ***************************/
1151
1152 #define pcmcia_device_attr(field, test, format) \
1153 static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf) \
1154 { \
1155 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
1156 return p_dev->test ? sprintf (buf, format, p_dev->field) : -ENODEV; \
1157 }
1158
1159 #define pcmcia_device_stringattr(name, field) \
1160 static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf) \
1161 { \
1162 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
1163 return p_dev->field ? sprintf (buf, "%s\n", p_dev->field) : -ENODEV; \
1164 }
1165
1166 pcmcia_device_attr(func, socket, "0x%02x\n");
1167 pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
1168 pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
1169 pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
1170 pcmcia_device_stringattr(prod_id1, prod_id[0]);
1171 pcmcia_device_stringattr(prod_id2, prod_id[1]);
1172 pcmcia_device_stringattr(prod_id3, prod_id[2]);
1173 pcmcia_device_stringattr(prod_id4, prod_id[3]);
1174
1175
1176 static ssize_t pcmcia_show_pm_state(struct device *dev, struct device_attribute *attr, char *buf)
1177 {
1178 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1179
1180 if (p_dev->suspended)
1181 return sprintf(buf, "off\n");
1182 else
1183 return sprintf(buf, "on\n");
1184 }
1185
1186 static ssize_t pcmcia_store_pm_state(struct device *dev, struct device_attribute *attr,
1187 const char *buf, size_t count)
1188 {
1189 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1190 int ret = 0;
1191
1192 if (!count)
1193 return -EINVAL;
1194
1195 if ((!p_dev->suspended) && !strncmp(buf, "off", 3))
1196 ret = runtime_suspend(dev);
1197 else if (p_dev->suspended && !strncmp(buf, "on", 2))
1198 runtime_resume(dev);
1199
1200 return ret ? ret : count;
1201 }
1202
1203
1204 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1205 {
1206 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1207 int i;
1208 u32 hash[4] = { 0, 0, 0, 0};
1209
1210 /* calculate hashes */
1211 for (i=0; i<4; i++) {
1212 if (!p_dev->prod_id[i])
1213 continue;
1214 hash[i] = crc32(0,p_dev->prod_id[i],strlen(p_dev->prod_id[i]));
1215 }
1216 return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
1217 "pa%08Xpb%08Xpc%08Xpd%08X\n",
1218 p_dev->has_manf_id ? p_dev->manf_id : 0,
1219 p_dev->has_card_id ? p_dev->card_id : 0,
1220 p_dev->has_func_id ? p_dev->func_id : 0,
1221 p_dev->func, p_dev->device_no,
1222 hash[0], hash[1], hash[2], hash[3]);
1223 }
1224
1225 static ssize_t pcmcia_store_allow_func_id_match(struct device *dev,
1226 struct device_attribute *attr, const char *buf, size_t count)
1227 {
1228 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1229 int ret;
1230
1231 if (!count)
1232 return -EINVAL;
1233
1234 mutex_lock(&p_dev->socket->skt_mutex);
1235 p_dev->allow_func_id_match = 1;
1236 mutex_unlock(&p_dev->socket->skt_mutex);
1237
1238 ret = bus_rescan_devices(&pcmcia_bus_type);
1239 if (ret)
1240 printk(KERN_INFO "pcmcia: bus_rescan_devices failed after "
1241 "allowing func_id matches\n");
1242
1243 return count;
1244 }
1245
1246 static struct device_attribute pcmcia_dev_attrs[] = {
1247 __ATTR(function, 0444, func_show, NULL),
1248 __ATTR(pm_state, 0644, pcmcia_show_pm_state, pcmcia_store_pm_state),
1249 __ATTR_RO(func_id),
1250 __ATTR_RO(manf_id),
1251 __ATTR_RO(card_id),
1252 __ATTR_RO(prod_id1),
1253 __ATTR_RO(prod_id2),
1254 __ATTR_RO(prod_id3),
1255 __ATTR_RO(prod_id4),
1256 __ATTR_RO(modalias),
1257 __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match),
1258 __ATTR_NULL,
1259 };
1260
1261 /* PM support, also needed for reset */
1262
1263 static int pcmcia_dev_suspend(struct device * dev, pm_message_t state)
1264 {
1265 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1266 struct pcmcia_driver *p_drv = NULL;
1267 int ret = 0;
1268
1269 ds_dbg(2, "suspending %s\n", dev->bus_id);
1270
1271 if (dev->driver)
1272 p_drv = to_pcmcia_drv(dev->driver);
1273
1274 if (!p_drv)
1275 goto out;
1276
1277 if (p_drv->suspend) {
1278 ret = p_drv->suspend(p_dev);
1279 if (ret) {
1280 printk(KERN_ERR "pcmcia: device %s (driver %s) did "
1281 "not want to go to sleep (%d)\n",
1282 p_dev->devname, p_drv->drv.name, ret);
1283 goto out;
1284 }
1285 }
1286
1287 if (p_dev->device_no == p_dev->func) {
1288 ds_dbg(2, "releasing configuration for %s\n", dev->bus_id);
1289 pcmcia_release_configuration(p_dev);
1290 }
1291
1292 out:
1293 if (!ret)
1294 p_dev->suspended = 1;
1295 return ret;
1296 }
1297
1298
1299 static int pcmcia_dev_resume(struct device * dev)
1300 {
1301 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1302 struct pcmcia_driver *p_drv = NULL;
1303 int ret = 0;
1304
1305 ds_dbg(2, "resuming %s\n", dev->bus_id);
1306
1307 if (dev->driver)
1308 p_drv = to_pcmcia_drv(dev->driver);
1309
1310 if (!p_drv)
1311 goto out;
1312
1313 if (p_dev->device_no == p_dev->func) {
1314 ds_dbg(2, "requesting configuration for %s\n", dev->bus_id);
1315 ret = pcmcia_request_configuration(p_dev, &p_dev->conf);
1316 if (ret)
1317 goto out;
1318 }
1319
1320 if (p_drv->resume)
1321 ret = p_drv->resume(p_dev);
1322
1323 out:
1324 if (!ret)
1325 p_dev->suspended = 0;
1326 return ret;
1327 }
1328
1329
1330 static int pcmcia_bus_suspend_callback(struct device *dev, void * _data)
1331 {
1332 struct pcmcia_socket *skt = _data;
1333 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1334
1335 if (p_dev->socket != skt || p_dev->suspended)
1336 return 0;
1337
1338 return runtime_suspend(dev);
1339 }
1340
1341 static int pcmcia_bus_resume_callback(struct device *dev, void * _data)
1342 {
1343 struct pcmcia_socket *skt = _data;
1344 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1345
1346 if (p_dev->socket != skt || !p_dev->suspended)
1347 return 0;
1348
1349 runtime_resume(dev);
1350
1351 return 0;
1352 }
1353
1354 static int pcmcia_bus_resume(struct pcmcia_socket *skt)
1355 {
1356 ds_dbg(2, "resuming socket %d\n", skt->sock);
1357 bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback);
1358 return 0;
1359 }
1360
1361 static int pcmcia_bus_suspend(struct pcmcia_socket *skt)
1362 {
1363 ds_dbg(2, "suspending socket %d\n", skt->sock);
1364 if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt,
1365 pcmcia_bus_suspend_callback)) {
1366 pcmcia_bus_resume(skt);
1367 return -EIO;
1368 }
1369 return 0;
1370 }
1371
1372
1373 /*======================================================================
1374
1375 The card status event handler.
1376
1377 ======================================================================*/
1378
1379 /* Normally, the event is passed to individual drivers after
1380 * informing userspace. Only for CS_EVENT_CARD_REMOVAL this
1381 * is inversed to maintain historic compatibility.
1382 */
1383
1384 static int ds_event(struct pcmcia_socket *skt, event_t event, int priority)
1385 {
1386 struct pcmcia_socket *s = pcmcia_get_socket(skt);
1387
1388 if (!s) {
1389 printk(KERN_ERR "PCMCIA obtaining reference to socket %p " \
1390 "failed, event 0x%x lost!\n", skt, event);
1391 return -ENODEV;
1392 }
1393
1394 ds_dbg(1, "ds_event(0x%06x, %d, 0x%p)\n",
1395 event, priority, skt);
1396
1397 switch (event) {
1398 case CS_EVENT_CARD_REMOVAL:
1399 s->pcmcia_state.present = 0;
1400 pcmcia_card_remove(skt, NULL);
1401 handle_event(skt, event);
1402 break;
1403
1404 case CS_EVENT_CARD_INSERTION:
1405 s->pcmcia_state.present = 1;
1406 pcmcia_card_add(skt);
1407 handle_event(skt, event);
1408 break;
1409
1410 case CS_EVENT_EJECTION_REQUEST:
1411 break;
1412
1413 case CS_EVENT_PM_SUSPEND:
1414 case CS_EVENT_PM_RESUME:
1415 case CS_EVENT_RESET_PHYSICAL:
1416 case CS_EVENT_CARD_RESET:
1417 default:
1418 handle_event(skt, event);
1419 break;
1420 }
1421
1422 pcmcia_put_socket(s);
1423
1424 return 0;
1425 } /* ds_event */
1426
1427
1428 struct pcmcia_device * pcmcia_dev_present(struct pcmcia_device *_p_dev)
1429 {
1430 struct pcmcia_device *p_dev;
1431 struct pcmcia_device *ret = NULL;
1432
1433 p_dev = pcmcia_get_dev(_p_dev);
1434 if (!p_dev)
1435 return NULL;
1436
1437 if (!p_dev->socket->pcmcia_state.present)
1438 goto out;
1439
1440 if (p_dev->_removed)
1441 goto out;
1442
1443 if (p_dev->suspended)
1444 goto out;
1445
1446 ret = p_dev;
1447 out:
1448 pcmcia_put_dev(p_dev);
1449 return ret;
1450 }
1451 EXPORT_SYMBOL(pcmcia_dev_present);
1452
1453
1454 static struct pcmcia_callback pcmcia_bus_callback = {
1455 .owner = THIS_MODULE,
1456 .event = ds_event,
1457 .requery = pcmcia_bus_rescan,
1458 .suspend = pcmcia_bus_suspend,
1459 .resume = pcmcia_bus_resume,
1460 };
1461
1462 static int __devinit pcmcia_bus_add_socket(struct device *dev,
1463 struct class_interface *class_intf)
1464 {
1465 struct pcmcia_socket *socket = dev_get_drvdata(dev);
1466 int ret;
1467
1468 socket = pcmcia_get_socket(socket);
1469 if (!socket) {
1470 printk(KERN_ERR "PCMCIA obtaining reference to socket %p failed\n", socket);
1471 return -ENODEV;
1472 }
1473
1474 /*
1475 * Ugly. But we want to wait for the socket threads to have started up.
1476 * We really should let the drivers themselves drive some of this..
1477 */
1478 msleep(250);
1479
1480 #ifdef CONFIG_PCMCIA_IOCTL
1481 init_waitqueue_head(&socket->queue);
1482 #endif
1483 INIT_LIST_HEAD(&socket->devices_list);
1484 INIT_WORK(&socket->device_add, pcmcia_delayed_add_device);
1485 memset(&socket->pcmcia_state, 0, sizeof(u8));
1486 socket->device_count = 0;
1487
1488 ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback);
1489 if (ret) {
1490 printk(KERN_ERR "PCMCIA registration PCCard core failed for socket %p\n", socket);
1491 pcmcia_put_socket(socket);
1492 return (ret);
1493 }
1494
1495 return 0;
1496 }
1497
1498 static void pcmcia_bus_remove_socket(struct device *dev,
1499 struct class_interface *class_intf)
1500 {
1501 struct pcmcia_socket *socket = dev_get_drvdata(dev);
1502
1503 if (!socket)
1504 return;
1505
1506 socket->pcmcia_state.dead = 1;
1507 pccard_register_pcmcia(socket, NULL);
1508
1509 /* unregister any unbound devices */
1510 mutex_lock(&socket->skt_mutex);
1511 pcmcia_card_remove(socket, NULL);
1512 mutex_unlock(&socket->skt_mutex);
1513
1514 pcmcia_put_socket(socket);
1515
1516 return;
1517 }
1518
1519
1520 /* the pcmcia_bus_interface is used to handle pcmcia socket devices */
1521 static struct class_interface pcmcia_bus_interface = {
1522 .class = &pcmcia_socket_class,
1523 .add_dev = &pcmcia_bus_add_socket,
1524 .remove_dev = &pcmcia_bus_remove_socket,
1525 };
1526
1527
1528 struct bus_type pcmcia_bus_type = {
1529 .name = "pcmcia",
1530 .uevent = pcmcia_bus_uevent,
1531 .match = pcmcia_bus_match,
1532 .dev_attrs = pcmcia_dev_attrs,
1533 .probe = pcmcia_device_probe,
1534 .remove = pcmcia_device_remove,
1535 .suspend = pcmcia_dev_suspend,
1536 .resume = pcmcia_dev_resume,
1537 };
1538
1539
1540 static int __init init_pcmcia_bus(void)
1541 {
1542 int ret;
1543
1544 spin_lock_init(&pcmcia_dev_list_lock);
1545
1546 ret = bus_register(&pcmcia_bus_type);
1547 if (ret < 0) {
1548 printk(KERN_WARNING "pcmcia: bus_register error: %d\n", ret);
1549 return ret;
1550 }
1551 ret = class_interface_register(&pcmcia_bus_interface);
1552 if (ret < 0) {
1553 printk(KERN_WARNING
1554 "pcmcia: class_interface_register error: %d\n", ret);
1555 bus_unregister(&pcmcia_bus_type);
1556 return ret;
1557 }
1558
1559 pcmcia_setup_ioctl();
1560
1561 return 0;
1562 }
1563 fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that
1564 * pcmcia_socket_class is already registered */
1565
1566
1567 static void __exit exit_pcmcia_bus(void)
1568 {
1569 pcmcia_cleanup_ioctl();
1570
1571 class_interface_unregister(&pcmcia_bus_interface);
1572
1573 bus_unregister(&pcmcia_bus_type);
1574 }
1575 module_exit(exit_pcmcia_bus);
1576
1577
1578 MODULE_ALIAS("ds");
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