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