V4L/DVB (11167): pvrusb2: Tie in various v4l2 operations into the sub-device mechanism
[linux-2.6] / drivers / pcmcia / ds.c
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 #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
36 /*====================================================================*/
37
38 /* Module parameters */
39
40 MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
41 MODULE_DESCRIPTION("PCMCIA Driver Services");
42 MODULE_LICENSE("GPL");
43
44 #ifdef CONFIG_PCMCIA_DEBUG
45 int ds_pc_debug;
46
47 module_param_named(pc_debug, ds_pc_debug, int, 0644);
48
49 #define ds_dbg(lvl, fmt, arg...) do {                           \
50         if (ds_pc_debug > (lvl))                                \
51                 printk(KERN_DEBUG "ds: " fmt , ## arg);         \
52 } while (0)
53 #define ds_dev_dbg(lvl, dev, fmt, arg...) do {                          \
54         if (ds_pc_debug > (lvl))                                        \
55                 dev_printk(KERN_DEBUG, dev, "ds: " fmt , ## arg);       \
56 } while (0)
57 #else
58 #define ds_dbg(lvl, fmt, arg...) do { } while (0)
59 #define ds_dev_dbg(lvl, dev, fmt, arg...) do { } while (0)
60 #endif
61
62 spinlock_t pcmcia_dev_list_lock;
63
64 /*====================================================================*/
65
66 /* code which was in cs.c before */
67
68 /* String tables for error messages */
69
70 typedef struct lookup_t {
71     const int key;
72     const char *msg;
73 } lookup_t;
74
75 static const lookup_t error_table[] = {
76     { 0,                        "Operation succeeded" },
77     { -EIO,                     "Input/Output error" },
78     { -ENODEV,                  "No card present" },
79     { -EINVAL,                  "Bad parameter" },
80     { -EACCES,                  "Configuration locked" },
81     { -EBUSY,                   "Resource in use" },
82     { -ENOSPC,                  "No more items" },
83     { -ENOMEM,                  "Out of resource" },
84 };
85
86
87 static const lookup_t service_table[] = {
88     { AccessConfigurationRegister,      "AccessConfigurationRegister" },
89     { AddSocketServices,                "AddSocketServices" },
90     { AdjustResourceInfo,               "AdjustResourceInfo" },
91     { CheckEraseQueue,                  "CheckEraseQueue" },
92     { CloseMemory,                      "CloseMemory" },
93     { DeregisterClient,                 "DeregisterClient" },
94     { DeregisterEraseQueue,             "DeregisterEraseQueue" },
95     { GetCardServicesInfo,              "GetCardServicesInfo" },
96     { GetClientInfo,                    "GetClientInfo" },
97     { GetConfigurationInfo,             "GetConfigurationInfo" },
98     { GetEventMask,                     "GetEventMask" },
99     { GetFirstClient,                   "GetFirstClient" },
100     { GetFirstRegion,                   "GetFirstRegion" },
101     { GetFirstTuple,                    "GetFirstTuple" },
102     { GetNextClient,                    "GetNextClient" },
103     { GetNextRegion,                    "GetNextRegion" },
104     { GetNextTuple,                     "GetNextTuple" },
105     { GetStatus,                        "GetStatus" },
106     { GetTupleData,                     "GetTupleData" },
107     { MapMemPage,                       "MapMemPage" },
108     { ModifyConfiguration,              "ModifyConfiguration" },
109     { ModifyWindow,                     "ModifyWindow" },
110     { OpenMemory,                       "OpenMemory" },
111     { ParseTuple,                       "ParseTuple" },
112     { ReadMemory,                       "ReadMemory" },
113     { RegisterClient,                   "RegisterClient" },
114     { RegisterEraseQueue,               "RegisterEraseQueue" },
115     { RegisterMTD,                      "RegisterMTD" },
116     { ReleaseConfiguration,             "ReleaseConfiguration" },
117     { ReleaseIO,                        "ReleaseIO" },
118     { ReleaseIRQ,                       "ReleaseIRQ" },
119     { ReleaseWindow,                    "ReleaseWindow" },
120     { RequestConfiguration,             "RequestConfiguration" },
121     { RequestIO,                        "RequestIO" },
122     { RequestIRQ,                       "RequestIRQ" },
123     { RequestSocketMask,                "RequestSocketMask" },
124     { RequestWindow,                    "RequestWindow" },
125     { ResetCard,                        "ResetCard" },
126     { SetEventMask,                     "SetEventMask" },
127     { ValidateCIS,                      "ValidateCIS" },
128     { WriteMemory,                      "WriteMemory" },
129     { BindDevice,                       "BindDevice" },
130     { BindMTD,                          "BindMTD" },
131     { ReportError,                      "ReportError" },
132     { SuspendCard,                      "SuspendCard" },
133     { ResumeCard,                       "ResumeCard" },
134     { EjectCard,                        "EjectCard" },
135     { InsertCard,                       "InsertCard" },
136     { ReplaceCIS,                       "ReplaceCIS" }
137 };
138
139 const char *pcmcia_error_func(int func)
140 {
141         int i;
142
143         for (i = 0; i < ARRAY_SIZE(service_table); i++)
144                 if (service_table[i].key == func)
145                         return service_table[i].msg;
146
147         return "Unknown service number";
148 }
149 EXPORT_SYMBOL(pcmcia_error_func);
150
151 const char *pcmcia_error_ret(int ret)
152 {
153         int i;
154
155         for (i = 0; i < ARRAY_SIZE(error_table); i++)
156                 if (error_table[i].key == ret)
157                         return error_table[i].msg;
158
159         return "unknown";
160 }
161 EXPORT_SYMBOL(pcmcia_error_ret);
162
163 /*======================================================================*/
164
165
166
167 static void pcmcia_check_driver(struct pcmcia_driver *p_drv)
168 {
169         struct pcmcia_device_id *did = p_drv->id_table;
170         unsigned int i;
171         u32 hash;
172
173         if (!p_drv->probe || !p_drv->remove)
174                 printk(KERN_DEBUG "pcmcia: %s lacks a requisite callback "
175                        "function\n", p_drv->drv.name);
176
177         while (did && did->match_flags) {
178                 for (i=0; i<4; i++) {
179                         if (!did->prod_id[i])
180                                 continue;
181
182                         hash = crc32(0, did->prod_id[i], strlen(did->prod_id[i]));
183                         if (hash == did->prod_id_hash[i])
184                                 continue;
185
186                         printk(KERN_DEBUG "pcmcia: %s: invalid hash for "
187                                "product string \"%s\": is 0x%x, should "
188                                "be 0x%x\n", p_drv->drv.name, did->prod_id[i],
189                                did->prod_id_hash[i], hash);
190                         printk(KERN_DEBUG "pcmcia: see "
191                                 "Documentation/pcmcia/devicetable.txt for "
192                                 "details\n");
193                 }
194                 did++;
195         }
196
197         return;
198 }
199
200
201 /*======================================================================*/
202
203
204 struct pcmcia_dynid {
205         struct list_head                node;
206         struct pcmcia_device_id         id;
207 };
208
209 /**
210  * pcmcia_store_new_id - add a new PCMCIA device ID to this driver and re-probe devices
211  * @driver: target device driver
212  * @buf: buffer for scanning device ID data
213  * @count: input size
214  *
215  * Adds a new dynamic PCMCIA device ID to this driver,
216  * and causes the driver to probe for all devices again.
217  */
218 static ssize_t
219 pcmcia_store_new_id(struct device_driver *driver, const char *buf, size_t count)
220 {
221         struct pcmcia_dynid *dynid;
222         struct pcmcia_driver *pdrv = to_pcmcia_drv(driver);
223         __u16 match_flags, manf_id, card_id;
224         __u8 func_id, function, device_no;
225         __u32 prod_id_hash[4] = {0, 0, 0, 0};
226         int fields=0;
227         int retval = 0;
228
229         fields = sscanf(buf, "%hx %hx %hx %hhx %hhx %hhx %x %x %x %x",
230                         &match_flags, &manf_id, &card_id, &func_id, &function, &device_no,
231                         &prod_id_hash[0], &prod_id_hash[1], &prod_id_hash[2], &prod_id_hash[3]);
232         if (fields < 6)
233                 return -EINVAL;
234
235         dynid = kzalloc(sizeof(struct pcmcia_dynid), GFP_KERNEL);
236         if (!dynid)
237                 return -ENOMEM;
238
239         INIT_LIST_HEAD(&dynid->node);
240         dynid->id.match_flags = match_flags;
241         dynid->id.manf_id = manf_id;
242         dynid->id.card_id = card_id;
243         dynid->id.func_id = func_id;
244         dynid->id.function = function;
245         dynid->id.device_no = device_no;
246         memcpy(dynid->id.prod_id_hash, prod_id_hash, sizeof(__u32) * 4);
247
248         spin_lock(&pdrv->dynids.lock);
249         list_add_tail(&pdrv->dynids.list, &dynid->node);
250         spin_unlock(&pdrv->dynids.lock);
251
252         if (get_driver(&pdrv->drv)) {
253                 retval = driver_attach(&pdrv->drv);
254                 put_driver(&pdrv->drv);
255         }
256
257         if (retval)
258                 return retval;
259         return count;
260 }
261 static DRIVER_ATTR(new_id, S_IWUSR, NULL, pcmcia_store_new_id);
262
263 static void
264 pcmcia_free_dynids(struct pcmcia_driver *drv)
265 {
266         struct pcmcia_dynid *dynid, *n;
267
268         spin_lock(&drv->dynids.lock);
269         list_for_each_entry_safe(dynid, n, &drv->dynids.list, node) {
270                 list_del(&dynid->node);
271                 kfree(dynid);
272         }
273         spin_unlock(&drv->dynids.lock);
274 }
275
276 static int
277 pcmcia_create_newid_file(struct pcmcia_driver *drv)
278 {
279         int error = 0;
280         if (drv->probe != NULL)
281                 error = driver_create_file(&drv->drv, &driver_attr_new_id);
282         return error;
283 }
284
285
286 /**
287  * pcmcia_register_driver - register a PCMCIA driver with the bus core
288  * @driver: the &driver being registered
289  *
290  * Registers a PCMCIA driver with the PCMCIA bus core.
291  */
292 int pcmcia_register_driver(struct pcmcia_driver *driver)
293 {
294         int error;
295
296         if (!driver)
297                 return -EINVAL;
298
299         pcmcia_check_driver(driver);
300
301         /* initialize common fields */
302         driver->drv.bus = &pcmcia_bus_type;
303         driver->drv.owner = driver->owner;
304         spin_lock_init(&driver->dynids.lock);
305         INIT_LIST_HEAD(&driver->dynids.list);
306
307         ds_dbg(3, "registering driver %s\n", driver->drv.name);
308
309         error = driver_register(&driver->drv);
310         if (error < 0)
311                 return error;
312
313         error = pcmcia_create_newid_file(driver);
314         if (error)
315                 driver_unregister(&driver->drv);
316
317         return error;
318 }
319 EXPORT_SYMBOL(pcmcia_register_driver);
320
321 /**
322  * pcmcia_unregister_driver - unregister a PCMCIA driver with the bus core
323  * @driver: the &driver being unregistered
324  */
325 void pcmcia_unregister_driver(struct pcmcia_driver *driver)
326 {
327         ds_dbg(3, "unregistering driver %s\n", driver->drv.name);
328         driver_unregister(&driver->drv);
329         pcmcia_free_dynids(driver);
330 }
331 EXPORT_SYMBOL(pcmcia_unregister_driver);
332
333
334 /* pcmcia_device handling */
335
336 struct pcmcia_device * pcmcia_get_dev(struct pcmcia_device *p_dev)
337 {
338         struct device *tmp_dev;
339         tmp_dev = get_device(&p_dev->dev);
340         if (!tmp_dev)
341                 return NULL;
342         return to_pcmcia_dev(tmp_dev);
343 }
344
345 void pcmcia_put_dev(struct pcmcia_device *p_dev)
346 {
347         if (p_dev)
348                 put_device(&p_dev->dev);
349 }
350
351 static void pcmcia_release_function(struct kref *ref)
352 {
353         struct config_t *c = container_of(ref, struct config_t, ref);
354         ds_dbg(1, "releasing config_t\n");
355         kfree(c);
356 }
357
358 static void pcmcia_release_dev(struct device *dev)
359 {
360         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
361         ds_dev_dbg(1, dev, "releasing device\n");
362         pcmcia_put_socket(p_dev->socket);
363         kfree(p_dev->devname);
364         kref_put(&p_dev->function_config->ref, pcmcia_release_function);
365         kfree(p_dev);
366 }
367
368 static void pcmcia_add_device_later(struct pcmcia_socket *s, int mfc)
369 {
370         if (!s->pcmcia_state.device_add_pending) {
371                 ds_dev_dbg(1, &s->dev, "scheduling to add %s secondary"
372                        " device to %d\n", mfc ? "mfc" : "pfc", s->sock);
373                 s->pcmcia_state.device_add_pending = 1;
374                 s->pcmcia_state.mfc_pfc = mfc;
375                 schedule_work(&s->device_add);
376         }
377         return;
378 }
379
380 static int pcmcia_device_probe(struct device * dev)
381 {
382         struct pcmcia_device *p_dev;
383         struct pcmcia_driver *p_drv;
384         struct pcmcia_device_id *did;
385         struct pcmcia_socket *s;
386         cistpl_config_t cis_config;
387         int ret = 0;
388
389         dev = get_device(dev);
390         if (!dev)
391                 return -ENODEV;
392
393         p_dev = to_pcmcia_dev(dev);
394         p_drv = to_pcmcia_drv(dev->driver);
395         s = p_dev->socket;
396
397         /* The PCMCIA code passes the match data in via dev->driver_data
398          * which is an ugly hack. Once the driver probe is called it may
399          * and often will overwrite the match data so we must save it first
400          *
401          * handle pseudo multifunction devices:
402          * there are at most two pseudo multifunction devices.
403          * if we're matching against the first, schedule a
404          * call which will then check whether there are two
405          * pseudo devices, and if not, add the second one.
406          */
407         did = p_dev->dev.driver_data;
408
409         ds_dev_dbg(1, dev, "trying to bind to %s\n", p_drv->drv.name);
410
411         if ((!p_drv->probe) || (!p_dev->function_config) ||
412             (!try_module_get(p_drv->owner))) {
413                 ret = -EINVAL;
414                 goto put_dev;
415         }
416
417         /* set up some more device information */
418         ret = pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_CONFIG,
419                                 &cis_config);
420         if (!ret) {
421                 p_dev->conf.ConfigBase = cis_config.base;
422                 p_dev->conf.Present = cis_config.rmask[0];
423         } else {
424                 dev_printk(KERN_INFO, dev,
425                            "pcmcia: could not parse base and rmask0 of CIS\n");
426                 p_dev->conf.ConfigBase = 0;
427                 p_dev->conf.Present = 0;
428         }
429
430         ret = p_drv->probe(p_dev);
431         if (ret) {
432                 ds_dev_dbg(1, dev, "binding to %s failed with %d\n",
433                            p_drv->drv.name, ret);
434                 goto put_module;
435         }
436
437         if (did && (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) &&
438             (p_dev->socket->device_count == 1) && (p_dev->device_no == 0))
439                 pcmcia_add_device_later(p_dev->socket, 0);
440
441 put_module:
442         if (ret)
443                 module_put(p_drv->owner);
444 put_dev:
445         if (ret)
446                 put_device(dev);
447         return (ret);
448 }
449
450
451 /*
452  * Removes a PCMCIA card from the device tree and socket list.
453  */
454 static void pcmcia_card_remove(struct pcmcia_socket *s, struct pcmcia_device *leftover)
455 {
456         struct pcmcia_device    *p_dev;
457         struct pcmcia_device    *tmp;
458         unsigned long           flags;
459
460         ds_dev_dbg(2, leftover ? &leftover->dev : &s->dev,
461                    "pcmcia_card_remove(%d) %s\n", s->sock,
462                    leftover ? leftover->devname : "");
463
464         if (!leftover)
465                 s->device_count = 0;
466         else
467                 s->device_count = 1;
468
469         /* unregister all pcmcia_devices registered with this socket, except leftover */
470         list_for_each_entry_safe(p_dev, tmp, &s->devices_list, socket_device_list) {
471                 if (p_dev == leftover)
472                         continue;
473
474                 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
475                 list_del(&p_dev->socket_device_list);
476                 p_dev->_removed=1;
477                 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
478
479                 ds_dev_dbg(2, &p_dev->dev, "unregistering device\n");
480                 device_unregister(&p_dev->dev);
481         }
482
483         return;
484 }
485
486 static int pcmcia_device_remove(struct device * dev)
487 {
488         struct pcmcia_device *p_dev;
489         struct pcmcia_driver *p_drv;
490         struct pcmcia_device_id *did;
491         int i;
492
493         p_dev = to_pcmcia_dev(dev);
494         p_drv = to_pcmcia_drv(dev->driver);
495
496         ds_dev_dbg(1, dev, "removing device\n");
497
498         /* If we're removing the primary module driving a
499          * pseudo multi-function card, we need to unbind
500          * all devices
501          */
502         did = p_dev->dev.driver_data;
503         if (did && (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) &&
504             (p_dev->socket->device_count != 0) &&
505             (p_dev->device_no == 0))
506                 pcmcia_card_remove(p_dev->socket, p_dev);
507
508         /* detach the "instance" */
509         if (!p_drv)
510                 return 0;
511
512         if (p_drv->remove)
513                 p_drv->remove(p_dev);
514
515         p_dev->dev_node = NULL;
516
517         /* check for proper unloading */
518         if (p_dev->_irq || p_dev->_io || p_dev->_locked)
519                 dev_printk(KERN_INFO, dev,
520                         "pcmcia: driver %s did not release config properly\n",
521                         p_drv->drv.name);
522
523         for (i = 0; i < MAX_WIN; i++)
524                 if (p_dev->_win & CLIENT_WIN_REQ(i))
525                         dev_printk(KERN_INFO, dev,
526                           "pcmcia: driver %s did not release window properly\n",
527                            p_drv->drv.name);
528
529         /* references from pcmcia_probe_device */
530         pcmcia_put_dev(p_dev);
531         module_put(p_drv->owner);
532
533         return 0;
534 }
535
536
537 /*
538  * pcmcia_device_query -- determine information about a pcmcia device
539  */
540 static int pcmcia_device_query(struct pcmcia_device *p_dev)
541 {
542         cistpl_manfid_t manf_id;
543         cistpl_funcid_t func_id;
544         cistpl_vers_1_t *vers1;
545         unsigned int i;
546
547         vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL);
548         if (!vers1)
549                 return -ENOMEM;
550
551         if (!pccard_read_tuple(p_dev->socket, p_dev->func,
552                                CISTPL_MANFID, &manf_id)) {
553                 p_dev->manf_id = manf_id.manf;
554                 p_dev->card_id = manf_id.card;
555                 p_dev->has_manf_id = 1;
556                 p_dev->has_card_id = 1;
557         }
558
559         if (!pccard_read_tuple(p_dev->socket, p_dev->func,
560                                CISTPL_FUNCID, &func_id)) {
561                 p_dev->func_id = func_id.func;
562                 p_dev->has_func_id = 1;
563         } else {
564                 /* rule of thumb: cards with no FUNCID, but with
565                  * common memory device geometry information, are
566                  * probably memory cards (from pcmcia-cs) */
567                 cistpl_device_geo_t *devgeo;
568
569                 devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL);
570                 if (!devgeo) {
571                         kfree(vers1);
572                         return -ENOMEM;
573                 }
574                 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
575                                       CISTPL_DEVICE_GEO, devgeo)) {
576                         ds_dev_dbg(0, &p_dev->dev,
577                                    "mem device geometry probably means "
578                                    "FUNCID_MEMORY\n");
579                         p_dev->func_id = CISTPL_FUNCID_MEMORY;
580                         p_dev->has_func_id = 1;
581                 }
582                 kfree(devgeo);
583         }
584
585         if (!pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_VERS_1,
586                                vers1)) {
587                 for (i=0; i < vers1->ns; i++) {
588                         char *tmp;
589                         unsigned int length;
590
591                         tmp = vers1->str + vers1->ofs[i];
592
593                         length = strlen(tmp) + 1;
594                         if ((length < 2) || (length > 255))
595                                 continue;
596
597                         p_dev->prod_id[i] = kmalloc(sizeof(char) * length,
598                                                     GFP_KERNEL);
599                         if (!p_dev->prod_id[i])
600                                 continue;
601
602                         p_dev->prod_id[i] = strncpy(p_dev->prod_id[i],
603                                                     tmp, length);
604                 }
605         }
606
607         kfree(vers1);
608         return 0;
609 }
610
611
612 /* device_add_lock is needed to avoid double registration by cardmgr and kernel.
613  * Serializes pcmcia_device_add; will most likely be removed in future.
614  *
615  * While it has the caveat that adding new PCMCIA devices inside(!) device_register()
616  * won't work, this doesn't matter much at the moment: the driver core doesn't
617  * support it either.
618  */
619 static DEFINE_MUTEX(device_add_lock);
620
621 struct pcmcia_device * pcmcia_device_add(struct pcmcia_socket *s, unsigned int function)
622 {
623         struct pcmcia_device *p_dev, *tmp_dev;
624         unsigned long flags;
625
626         s = pcmcia_get_socket(s);
627         if (!s)
628                 return NULL;
629
630         mutex_lock(&device_add_lock);
631
632         ds_dbg(3, "adding device to %d, function %d\n", s->sock, function);
633
634         /* max of 4 devices per card */
635         if (s->device_count == 4)
636                 goto err_put;
637
638         p_dev = kzalloc(sizeof(struct pcmcia_device), GFP_KERNEL);
639         if (!p_dev)
640                 goto err_put;
641
642         p_dev->socket = s;
643         p_dev->device_no = (s->device_count++);
644         p_dev->func   = function;
645
646         p_dev->dev.bus = &pcmcia_bus_type;
647         p_dev->dev.parent = s->dev.parent;
648         p_dev->dev.release = pcmcia_release_dev;
649         /* by default don't allow DMA */
650         p_dev->dma_mask = DMA_MASK_NONE;
651         p_dev->dev.dma_mask = &p_dev->dma_mask;
652         dev_set_name(&p_dev->dev, "%d.%d", p_dev->socket->sock, p_dev->device_no);
653         if (!dev_name(&p_dev->dev))
654                 goto err_free;
655         p_dev->devname = kasprintf(GFP_KERNEL, "pcmcia%s", dev_name(&p_dev->dev));
656         if (!p_dev->devname)
657                 goto err_free;
658         ds_dev_dbg(3, &p_dev->dev, "devname is %s\n", p_dev->devname);
659
660         spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
661
662         /*
663          * p_dev->function_config must be the same for all card functions.
664          * Note that this is serialized by the device_add_lock, so that
665          * only one such struct will be created.
666          */
667         list_for_each_entry(tmp_dev, &s->devices_list, socket_device_list)
668                 if (p_dev->func == tmp_dev->func) {
669                         p_dev->function_config = tmp_dev->function_config;
670                         p_dev->io = tmp_dev->io;
671                         p_dev->irq = tmp_dev->irq;
672                         kref_get(&p_dev->function_config->ref);
673                 }
674
675         /* Add to the list in pcmcia_bus_socket */
676         list_add(&p_dev->socket_device_list, &s->devices_list);
677
678         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
679
680         if (!p_dev->function_config) {
681                 ds_dev_dbg(3, &p_dev->dev, "creating config_t\n");
682                 p_dev->function_config = kzalloc(sizeof(struct config_t),
683                                                  GFP_KERNEL);
684                 if (!p_dev->function_config)
685                         goto err_unreg;
686                 kref_init(&p_dev->function_config->ref);
687         }
688
689         dev_printk(KERN_NOTICE, &p_dev->dev,
690                    "pcmcia: registering new device %s\n",
691                    p_dev->devname);
692
693         pcmcia_device_query(p_dev);
694
695         if (device_register(&p_dev->dev))
696                 goto err_unreg;
697
698         mutex_unlock(&device_add_lock);
699
700         return p_dev;
701
702  err_unreg:
703         spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
704         list_del(&p_dev->socket_device_list);
705         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
706
707  err_free:
708         kfree(p_dev->devname);
709         kfree(p_dev);
710         s->device_count--;
711  err_put:
712         mutex_unlock(&device_add_lock);
713         pcmcia_put_socket(s);
714
715         return NULL;
716 }
717
718
719 static int pcmcia_card_add(struct pcmcia_socket *s)
720 {
721         cistpl_longlink_mfc_t mfc;
722         unsigned int no_funcs, i, no_chains;
723         int ret = 0;
724
725         if (!(s->resource_setup_done)) {
726                 ds_dev_dbg(3, &s->dev,
727                            "no resources available, delaying card_add\n");
728                 return -EAGAIN; /* try again, but later... */
729         }
730
731         if (pcmcia_validate_mem(s)) {
732                 ds_dev_dbg(3, &s->dev, "validating mem resources failed, "
733                        "delaying card_add\n");
734                 return -EAGAIN; /* try again, but later... */
735         }
736
737         ret = pccard_validate_cis(s, BIND_FN_ALL, &no_chains);
738         if (ret || !no_chains) {
739                 ds_dev_dbg(0, &s->dev, "invalid CIS or invalid resources\n");
740                 return -ENODEV;
741         }
742
743         if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
744                 no_funcs = mfc.nfn;
745         else
746                 no_funcs = 1;
747         s->functions = no_funcs;
748
749         for (i=0; i < no_funcs; i++)
750                 pcmcia_device_add(s, i);
751
752         return (ret);
753 }
754
755
756 static void pcmcia_delayed_add_device(struct work_struct *work)
757 {
758         struct pcmcia_socket *s =
759                 container_of(work, struct pcmcia_socket, device_add);
760         ds_dev_dbg(1, &s->dev, "adding additional device to %d\n", s->sock);
761         pcmcia_device_add(s, s->pcmcia_state.mfc_pfc);
762         s->pcmcia_state.device_add_pending = 0;
763         s->pcmcia_state.mfc_pfc = 0;
764 }
765
766 static int pcmcia_requery(struct device *dev, void * _data)
767 {
768         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
769         if (!p_dev->dev.driver) {
770                 ds_dev_dbg(1, dev, "update device information\n");
771                 pcmcia_device_query(p_dev);
772         }
773
774         return 0;
775 }
776
777 static void pcmcia_bus_rescan(struct pcmcia_socket *skt, int new_cis)
778 {
779         int no_devices = 0;
780         int ret = 0;
781         unsigned long flags;
782
783         /* must be called with skt_mutex held */
784         ds_dev_dbg(0, &skt->dev, "re-scanning socket %d\n", skt->sock);
785
786         spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
787         if (list_empty(&skt->devices_list))
788                 no_devices = 1;
789         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
790
791         /* If this is because of a CIS override, start over */
792         if (new_cis && !no_devices)
793                 pcmcia_card_remove(skt, NULL);
794
795         /* if no devices were added for this socket yet because of
796          * missing resource information or other trouble, we need to
797          * do this now. */
798         if (no_devices || new_cis) {
799                 ret = pcmcia_card_add(skt);
800                 if (ret)
801                         return;
802         }
803
804         /* some device information might have changed because of a CIS
805          * update or because we can finally read it correctly... so
806          * determine it again, overwriting old values if necessary. */
807         bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery);
808
809         /* we re-scan all devices, not just the ones connected to this
810          * socket. This does not matter, though. */
811         ret = bus_rescan_devices(&pcmcia_bus_type);
812         if (ret)
813                 printk(KERN_INFO "pcmcia: bus_rescan_devices failed\n");
814 }
815
816 #ifdef CONFIG_PCMCIA_LOAD_CIS
817
818 /**
819  * pcmcia_load_firmware - load CIS from userspace if device-provided is broken
820  * @dev: the pcmcia device which needs a CIS override
821  * @filename: requested filename in /lib/firmware/
822  *
823  * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if
824  * the one provided by the card is broken. The firmware files reside in
825  * /lib/firmware/ in userspace.
826  */
827 static int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
828 {
829         struct pcmcia_socket *s = dev->socket;
830         const struct firmware *fw;
831         char path[FIRMWARE_NAME_MAX];
832         int ret = -ENOMEM;
833         int no_funcs;
834         int old_funcs;
835         cistpl_longlink_mfc_t mfc;
836
837         if (!filename)
838                 return -EINVAL;
839
840         ds_dev_dbg(1, &dev->dev, "trying to load CIS file %s\n", filename);
841
842         if (strlen(filename) > (FIRMWARE_NAME_MAX - 1)) {
843                 dev_printk(KERN_WARNING, &dev->dev,
844                            "pcmcia: CIS filename is too long [%s]\n",
845                            filename);
846                 return -EINVAL;
847         }
848
849         snprintf(path, sizeof(path), "%s", filename);
850
851         if (request_firmware(&fw, path, &dev->dev) == 0) {
852                 if (fw->size >= CISTPL_MAX_CIS_SIZE) {
853                         ret = -EINVAL;
854                         dev_printk(KERN_ERR, &dev->dev,
855                                    "pcmcia: CIS override is too big\n");
856                         goto release;
857                 }
858
859                 if (!pcmcia_replace_cis(s, fw->data, fw->size))
860                         ret = 0;
861                 else {
862                         dev_printk(KERN_ERR, &dev->dev,
863                                    "pcmcia: CIS override failed\n");
864                         goto release;
865                 }
866
867
868                 /* update information */
869                 pcmcia_device_query(dev);
870
871                 /* does this cis override add or remove functions? */
872                 old_funcs = s->functions;
873
874                 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
875                         no_funcs = mfc.nfn;
876                 else
877                         no_funcs = 1;
878                 s->functions = no_funcs;
879
880                 if (old_funcs > no_funcs)
881                         pcmcia_card_remove(s, dev);
882                 else if (no_funcs > old_funcs)
883                         pcmcia_add_device_later(s, 1);
884         }
885  release:
886         release_firmware(fw);
887
888         return (ret);
889 }
890
891 #else /* !CONFIG_PCMCIA_LOAD_CIS */
892
893 static inline int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
894 {
895         return -ENODEV;
896 }
897
898 #endif
899
900
901 static inline int pcmcia_devmatch(struct pcmcia_device *dev,
902                                   struct pcmcia_device_id *did)
903 {
904         if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
905                 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
906                         return 0;
907         }
908
909         if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
910                 if ((!dev->has_card_id) || (dev->card_id != did->card_id))
911                         return 0;
912         }
913
914         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
915                 if (dev->func != did->function)
916                         return 0;
917         }
918
919         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
920                 if (!dev->prod_id[0])
921                         return 0;
922                 if (strcmp(did->prod_id[0], dev->prod_id[0]))
923                         return 0;
924         }
925
926         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
927                 if (!dev->prod_id[1])
928                         return 0;
929                 if (strcmp(did->prod_id[1], dev->prod_id[1]))
930                         return 0;
931         }
932
933         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
934                 if (!dev->prod_id[2])
935                         return 0;
936                 if (strcmp(did->prod_id[2], dev->prod_id[2]))
937                         return 0;
938         }
939
940         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
941                 if (!dev->prod_id[3])
942                         return 0;
943                 if (strcmp(did->prod_id[3], dev->prod_id[3]))
944                         return 0;
945         }
946
947         if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
948                 if (dev->device_no != did->device_no)
949                         return 0;
950         }
951
952         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
953                 if ((!dev->has_func_id) || (dev->func_id != did->func_id))
954                         return 0;
955
956                 /* if this is a pseudo-multi-function device,
957                  * we need explicit matches */
958                 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO)
959                         return 0;
960                 if (dev->device_no)
961                         return 0;
962
963                 /* also, FUNC_ID matching needs to be activated by userspace
964                  * after it has re-checked that there is no possible module
965                  * with a prod_id/manf_id/card_id match.
966                  */
967                 ds_dev_dbg(0, &dev->dev,
968                         "skipping FUNC_ID match until userspace interaction\n");
969                 if (!dev->allow_func_id_match)
970                         return 0;
971         }
972
973         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
974                 ds_dev_dbg(0, &dev->dev, "device needs a fake CIS\n");
975                 if (!dev->socket->fake_cis)
976                         pcmcia_load_firmware(dev, did->cisfile);
977
978                 if (!dev->socket->fake_cis)
979                         return 0;
980         }
981
982         if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
983                 int i;
984                 for (i=0; i<4; i++)
985                         if (dev->prod_id[i])
986                                 return 0;
987                 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
988                         return 0;
989         }
990
991         dev->dev.driver_data = (void *) did;
992
993         return 1;
994 }
995
996
997 static int pcmcia_bus_match(struct device * dev, struct device_driver * drv) {
998         struct pcmcia_device * p_dev = to_pcmcia_dev(dev);
999         struct pcmcia_driver * p_drv = to_pcmcia_drv(drv);
1000         struct pcmcia_device_id *did = p_drv->id_table;
1001         struct pcmcia_dynid *dynid;
1002
1003         /* match dynamic devices first */
1004         spin_lock(&p_drv->dynids.lock);
1005         list_for_each_entry(dynid, &p_drv->dynids.list, node) {
1006                 ds_dev_dbg(3, dev, "trying to match to %s\n", drv->name);
1007                 if (pcmcia_devmatch(p_dev, &dynid->id)) {
1008                         ds_dev_dbg(0, dev, "matched to %s\n", drv->name);
1009                         spin_unlock(&p_drv->dynids.lock);
1010                         return 1;
1011                 }
1012         }
1013         spin_unlock(&p_drv->dynids.lock);
1014
1015 #ifdef CONFIG_PCMCIA_IOCTL
1016         /* matching by cardmgr */
1017         if (p_dev->cardmgr == p_drv) {
1018                 ds_dev_dbg(0, dev, "cardmgr matched to %s\n", drv->name);
1019                 return 1;
1020         }
1021 #endif
1022
1023         while (did && did->match_flags) {
1024                 ds_dev_dbg(3, dev, "trying to match to %s\n", drv->name);
1025                 if (pcmcia_devmatch(p_dev, did)) {
1026                         ds_dev_dbg(0, dev, "matched to %s\n", drv->name);
1027                         return 1;
1028                 }
1029                 did++;
1030         }
1031
1032         return 0;
1033 }
1034
1035 #ifdef CONFIG_HOTPLUG
1036
1037 static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
1038 {
1039         struct pcmcia_device *p_dev;
1040         int i;
1041         u32 hash[4] = { 0, 0, 0, 0};
1042
1043         if (!dev)
1044                 return -ENODEV;
1045
1046         p_dev = to_pcmcia_dev(dev);
1047
1048         /* calculate hashes */
1049         for (i=0; i<4; i++) {
1050                 if (!p_dev->prod_id[i])
1051                         continue;
1052                 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
1053         }
1054
1055         if (add_uevent_var(env, "SOCKET_NO=%u", p_dev->socket->sock))
1056                 return -ENOMEM;
1057
1058         if (add_uevent_var(env, "DEVICE_NO=%02X", p_dev->device_no))
1059                 return -ENOMEM;
1060
1061         if (add_uevent_var(env, "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
1062                            "pa%08Xpb%08Xpc%08Xpd%08X",
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,
1067                            p_dev->device_no,
1068                            hash[0],
1069                            hash[1],
1070                            hash[2],
1071                            hash[3]))
1072                 return -ENOMEM;
1073
1074         return 0;
1075 }
1076
1077 #else
1078
1079 static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
1080 {
1081         return -ENODEV;
1082 }
1083
1084 #endif
1085
1086 /************************ runtime PM support ***************************/
1087
1088 static int pcmcia_dev_suspend(struct device *dev, pm_message_t state);
1089 static int pcmcia_dev_resume(struct device *dev);
1090
1091 static int runtime_suspend(struct device *dev)
1092 {
1093         int rc;
1094
1095         down(&dev->sem);
1096         rc = pcmcia_dev_suspend(dev, PMSG_SUSPEND);
1097         up(&dev->sem);
1098         return rc;
1099 }
1100
1101 static void runtime_resume(struct device *dev)
1102 {
1103         int rc;
1104
1105         down(&dev->sem);
1106         rc = pcmcia_dev_resume(dev);
1107         up(&dev->sem);
1108 }
1109
1110 /************************ per-device sysfs output ***************************/
1111
1112 #define pcmcia_device_attr(field, test, format)                         \
1113 static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf)              \
1114 {                                                                       \
1115         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);               \
1116         return p_dev->test ? sprintf (buf, format, p_dev->field) : -ENODEV; \
1117 }
1118
1119 #define pcmcia_device_stringattr(name, field)                                   \
1120 static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf)               \
1121 {                                                                       \
1122         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);               \
1123         return p_dev->field ? sprintf (buf, "%s\n", p_dev->field) : -ENODEV; \
1124 }
1125
1126 pcmcia_device_attr(func, socket, "0x%02x\n");
1127 pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
1128 pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
1129 pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
1130 pcmcia_device_stringattr(prod_id1, prod_id[0]);
1131 pcmcia_device_stringattr(prod_id2, prod_id[1]);
1132 pcmcia_device_stringattr(prod_id3, prod_id[2]);
1133 pcmcia_device_stringattr(prod_id4, prod_id[3]);
1134
1135
1136 static ssize_t pcmcia_show_pm_state(struct device *dev, struct device_attribute *attr, char *buf)
1137 {
1138         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1139
1140         if (p_dev->suspended)
1141                 return sprintf(buf, "off\n");
1142         else
1143                 return sprintf(buf, "on\n");
1144 }
1145
1146 static ssize_t pcmcia_store_pm_state(struct device *dev, struct device_attribute *attr,
1147                                      const char *buf, size_t count)
1148 {
1149         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1150         int ret = 0;
1151
1152         if (!count)
1153                 return -EINVAL;
1154
1155         if ((!p_dev->suspended) && !strncmp(buf, "off", 3))
1156                 ret = runtime_suspend(dev);
1157         else if (p_dev->suspended && !strncmp(buf, "on", 2))
1158                 runtime_resume(dev);
1159
1160         return ret ? ret : count;
1161 }
1162
1163
1164 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1165 {
1166         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1167         int i;
1168         u32 hash[4] = { 0, 0, 0, 0};
1169
1170         /* calculate hashes */
1171         for (i=0; i<4; i++) {
1172                 if (!p_dev->prod_id[i])
1173                         continue;
1174                 hash[i] = crc32(0,p_dev->prod_id[i],strlen(p_dev->prod_id[i]));
1175         }
1176         return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
1177                                 "pa%08Xpb%08Xpc%08Xpd%08X\n",
1178                                 p_dev->has_manf_id ? p_dev->manf_id : 0,
1179                                 p_dev->has_card_id ? p_dev->card_id : 0,
1180                                 p_dev->has_func_id ? p_dev->func_id : 0,
1181                                 p_dev->func, p_dev->device_no,
1182                                 hash[0], hash[1], hash[2], hash[3]);
1183 }
1184
1185 static ssize_t pcmcia_store_allow_func_id_match(struct device *dev,
1186                 struct device_attribute *attr, const char *buf, size_t count)
1187 {
1188         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1189         int ret;
1190
1191         if (!count)
1192                 return -EINVAL;
1193
1194         mutex_lock(&p_dev->socket->skt_mutex);
1195         p_dev->allow_func_id_match = 1;
1196         mutex_unlock(&p_dev->socket->skt_mutex);
1197
1198         ret = bus_rescan_devices(&pcmcia_bus_type);
1199         if (ret)
1200                 printk(KERN_INFO "pcmcia: bus_rescan_devices failed after "
1201                        "allowing func_id matches\n");
1202
1203         return count;
1204 }
1205
1206 static struct device_attribute pcmcia_dev_attrs[] = {
1207         __ATTR(function, 0444, func_show, NULL),
1208         __ATTR(pm_state, 0644, pcmcia_show_pm_state, pcmcia_store_pm_state),
1209         __ATTR_RO(func_id),
1210         __ATTR_RO(manf_id),
1211         __ATTR_RO(card_id),
1212         __ATTR_RO(prod_id1),
1213         __ATTR_RO(prod_id2),
1214         __ATTR_RO(prod_id3),
1215         __ATTR_RO(prod_id4),
1216         __ATTR_RO(modalias),
1217         __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match),
1218         __ATTR_NULL,
1219 };
1220
1221 /* PM support, also needed for reset */
1222
1223 static int pcmcia_dev_suspend(struct device * dev, pm_message_t state)
1224 {
1225         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1226         struct pcmcia_driver *p_drv = NULL;
1227         int ret = 0;
1228
1229         if (p_dev->suspended)
1230                 return 0;
1231
1232         ds_dev_dbg(2, dev, "suspending\n");
1233
1234         if (dev->driver)
1235                 p_drv = to_pcmcia_drv(dev->driver);
1236
1237         if (!p_drv)
1238                 goto out;
1239
1240         if (p_drv->suspend) {
1241                 ret = p_drv->suspend(p_dev);
1242                 if (ret) {
1243                         dev_printk(KERN_ERR, dev,
1244                                    "pcmcia: device %s (driver %s) did "
1245                                    "not want to go to sleep (%d)\n",
1246                                    p_dev->devname, p_drv->drv.name, ret);
1247                         goto out;
1248                 }
1249         }
1250
1251         if (p_dev->device_no == p_dev->func) {
1252                 ds_dev_dbg(2, dev, "releasing configuration\n");
1253                 pcmcia_release_configuration(p_dev);
1254         }
1255
1256  out:
1257         if (!ret)
1258                 p_dev->suspended = 1;
1259         return ret;
1260 }
1261
1262
1263 static int pcmcia_dev_resume(struct device * dev)
1264 {
1265         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1266         struct pcmcia_driver *p_drv = NULL;
1267         int ret = 0;
1268
1269         if (!p_dev->suspended)
1270                 return 0;
1271
1272         ds_dev_dbg(2, dev, "resuming\n");
1273
1274         if (dev->driver)
1275                 p_drv = to_pcmcia_drv(dev->driver);
1276
1277         if (!p_drv)
1278                 goto out;
1279
1280         if (p_dev->device_no == p_dev->func) {
1281                 ds_dev_dbg(2, dev, "requesting configuration\n");
1282                 ret = pcmcia_request_configuration(p_dev, &p_dev->conf);
1283                 if (ret)
1284                         goto out;
1285         }
1286
1287         if (p_drv->resume)
1288                 ret = p_drv->resume(p_dev);
1289
1290  out:
1291         if (!ret)
1292                 p_dev->suspended = 0;
1293         return ret;
1294 }
1295
1296
1297 static int pcmcia_bus_suspend_callback(struct device *dev, void * _data)
1298 {
1299         struct pcmcia_socket *skt = _data;
1300         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1301
1302         if (p_dev->socket != skt || p_dev->suspended)
1303                 return 0;
1304
1305         return runtime_suspend(dev);
1306 }
1307
1308 static int pcmcia_bus_resume_callback(struct device *dev, void * _data)
1309 {
1310         struct pcmcia_socket *skt = _data;
1311         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1312
1313         if (p_dev->socket != skt || !p_dev->suspended)
1314                 return 0;
1315
1316         runtime_resume(dev);
1317
1318         return 0;
1319 }
1320
1321 static int pcmcia_bus_resume(struct pcmcia_socket *skt)
1322 {
1323         ds_dev_dbg(2, &skt->dev, "resuming socket %d\n", skt->sock);
1324         bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback);
1325         return 0;
1326 }
1327
1328 static int pcmcia_bus_suspend(struct pcmcia_socket *skt)
1329 {
1330         ds_dev_dbg(2, &skt->dev, "suspending socket %d\n", skt->sock);
1331         if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt,
1332                              pcmcia_bus_suspend_callback)) {
1333                 pcmcia_bus_resume(skt);
1334                 return -EIO;
1335         }
1336         return 0;
1337 }
1338
1339
1340 /*======================================================================
1341
1342     The card status event handler.
1343     
1344 ======================================================================*/
1345
1346 /* Normally, the event is passed to individual drivers after
1347  * informing userspace. Only for CS_EVENT_CARD_REMOVAL this
1348  * is inversed to maintain historic compatibility.
1349  */
1350
1351 static int ds_event(struct pcmcia_socket *skt, event_t event, int priority)
1352 {
1353         struct pcmcia_socket *s = pcmcia_get_socket(skt);
1354
1355         if (!s) {
1356                 dev_printk(KERN_ERR, &skt->dev,
1357                            "PCMCIA obtaining reference to socket "      \
1358                            "failed, event 0x%x lost!\n", event);
1359                 return -ENODEV;
1360         }
1361
1362         ds_dev_dbg(1, &skt->dev, "ds_event(0x%06x, %d, 0x%p)\n",
1363                    event, priority, skt);
1364
1365         switch (event) {
1366         case CS_EVENT_CARD_REMOVAL:
1367                 s->pcmcia_state.present = 0;
1368                 pcmcia_card_remove(skt, NULL);
1369                 handle_event(skt, event);
1370                 break;
1371
1372         case CS_EVENT_CARD_INSERTION:
1373                 s->pcmcia_state.present = 1;
1374                 pcmcia_card_add(skt);
1375                 handle_event(skt, event);
1376                 break;
1377
1378         case CS_EVENT_EJECTION_REQUEST:
1379                 break;
1380
1381         case CS_EVENT_PM_SUSPEND:
1382         case CS_EVENT_PM_RESUME:
1383         case CS_EVENT_RESET_PHYSICAL:
1384         case CS_EVENT_CARD_RESET:
1385         default:
1386                 handle_event(skt, event);
1387                 break;
1388     }
1389
1390     pcmcia_put_socket(s);
1391
1392     return 0;
1393 } /* ds_event */
1394
1395
1396 struct pcmcia_device * pcmcia_dev_present(struct pcmcia_device *_p_dev)
1397 {
1398         struct pcmcia_device *p_dev;
1399         struct pcmcia_device *ret = NULL;
1400
1401         p_dev = pcmcia_get_dev(_p_dev);
1402         if (!p_dev)
1403                 return NULL;
1404
1405         if (!p_dev->socket->pcmcia_state.present)
1406                 goto out;
1407
1408         if (p_dev->_removed)
1409                 goto out;
1410
1411         if (p_dev->suspended)
1412                 goto out;
1413
1414         ret = p_dev;
1415  out:
1416         pcmcia_put_dev(p_dev);
1417         return ret;
1418 }
1419 EXPORT_SYMBOL(pcmcia_dev_present);
1420
1421
1422 static struct pcmcia_callback pcmcia_bus_callback = {
1423         .owner = THIS_MODULE,
1424         .event = ds_event,
1425         .requery = pcmcia_bus_rescan,
1426         .suspend = pcmcia_bus_suspend,
1427         .resume = pcmcia_bus_resume,
1428 };
1429
1430 static int __devinit pcmcia_bus_add_socket(struct device *dev,
1431                                            struct class_interface *class_intf)
1432 {
1433         struct pcmcia_socket *socket = dev_get_drvdata(dev);
1434         int ret;
1435
1436         socket = pcmcia_get_socket(socket);
1437         if (!socket) {
1438                 dev_printk(KERN_ERR, dev,
1439                            "PCMCIA obtaining reference to socket failed\n");
1440                 return -ENODEV;
1441         }
1442
1443         /*
1444          * Ugly. But we want to wait for the socket threads to have started up.
1445          * We really should let the drivers themselves drive some of this..
1446          */
1447         msleep(250);
1448
1449 #ifdef CONFIG_PCMCIA_IOCTL
1450         init_waitqueue_head(&socket->queue);
1451 #endif
1452         INIT_LIST_HEAD(&socket->devices_list);
1453         INIT_WORK(&socket->device_add, pcmcia_delayed_add_device);
1454         memset(&socket->pcmcia_state, 0, sizeof(u8));
1455         socket->device_count = 0;
1456
1457         ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback);
1458         if (ret) {
1459                 dev_printk(KERN_ERR, dev, "PCMCIA registration failed\n");
1460                 pcmcia_put_socket(socket);
1461                 return (ret);
1462         }
1463
1464         return 0;
1465 }
1466
1467 static void pcmcia_bus_remove_socket(struct device *dev,
1468                                      struct class_interface *class_intf)
1469 {
1470         struct pcmcia_socket *socket = dev_get_drvdata(dev);
1471
1472         if (!socket)
1473                 return;
1474
1475         socket->pcmcia_state.dead = 1;
1476         pccard_register_pcmcia(socket, NULL);
1477
1478         /* unregister any unbound devices */
1479         mutex_lock(&socket->skt_mutex);
1480         pcmcia_card_remove(socket, NULL);
1481         mutex_unlock(&socket->skt_mutex);
1482
1483         pcmcia_put_socket(socket);
1484
1485         return;
1486 }
1487
1488
1489 /* the pcmcia_bus_interface is used to handle pcmcia socket devices */
1490 static struct class_interface pcmcia_bus_interface __refdata = {
1491         .class = &pcmcia_socket_class,
1492         .add_dev = &pcmcia_bus_add_socket,
1493         .remove_dev = &pcmcia_bus_remove_socket,
1494 };
1495
1496
1497 struct bus_type pcmcia_bus_type = {
1498         .name = "pcmcia",
1499         .uevent = pcmcia_bus_uevent,
1500         .match = pcmcia_bus_match,
1501         .dev_attrs = pcmcia_dev_attrs,
1502         .probe = pcmcia_device_probe,
1503         .remove = pcmcia_device_remove,
1504         .suspend = pcmcia_dev_suspend,
1505         .resume = pcmcia_dev_resume,
1506 };
1507
1508
1509 static int __init init_pcmcia_bus(void)
1510 {
1511         int ret;
1512
1513         spin_lock_init(&pcmcia_dev_list_lock);
1514
1515         ret = bus_register(&pcmcia_bus_type);
1516         if (ret < 0) {
1517                 printk(KERN_WARNING "pcmcia: bus_register error: %d\n", ret);
1518                 return ret;
1519         }
1520         ret = class_interface_register(&pcmcia_bus_interface);
1521         if (ret < 0) {
1522                 printk(KERN_WARNING
1523                         "pcmcia: class_interface_register error: %d\n", ret);
1524                 bus_unregister(&pcmcia_bus_type);
1525                 return ret;
1526         }
1527
1528         pcmcia_setup_ioctl();
1529
1530         return 0;
1531 }
1532 fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that 
1533                                * pcmcia_socket_class is already registered */
1534
1535
1536 static void __exit exit_pcmcia_bus(void)
1537 {
1538         pcmcia_cleanup_ioctl();
1539
1540         class_interface_unregister(&pcmcia_bus_interface);
1541
1542         bus_unregister(&pcmcia_bus_type);
1543 }
1544 module_exit(exit_pcmcia_bus);
1545
1546
1547 MODULE_ALIAS("ds");