firmware: pcmcia/ds: prepare for FIRMWARE_NAME_MAX removal
[linux-2.6.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         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         int ret = -ENOMEM;
832         int no_funcs;
833         int old_funcs;
834         cistpl_longlink_mfc_t mfc;
835
836         if (!filename)
837                 return -EINVAL;
838
839         ds_dev_dbg(1, &dev->dev, "trying to load CIS file %s\n", filename);
840
841         if (request_firmware(&fw, filename, &dev->dev) == 0) {
842                 if (fw->size >= CISTPL_MAX_CIS_SIZE) {
843                         ret = -EINVAL;
844                         dev_printk(KERN_ERR, &dev->dev,
845                                    "pcmcia: CIS override is too big\n");
846                         goto release;
847                 }
848
849                 if (!pcmcia_replace_cis(s, fw->data, fw->size))
850                         ret = 0;
851                 else {
852                         dev_printk(KERN_ERR, &dev->dev,
853                                    "pcmcia: CIS override failed\n");
854                         goto release;
855                 }
856
857
858                 /* update information */
859                 pcmcia_device_query(dev);
860
861                 /* does this cis override add or remove functions? */
862                 old_funcs = s->functions;
863
864                 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
865                         no_funcs = mfc.nfn;
866                 else
867                         no_funcs = 1;
868                 s->functions = no_funcs;
869
870                 if (old_funcs > no_funcs)
871                         pcmcia_card_remove(s, dev);
872                 else if (no_funcs > old_funcs)
873                         pcmcia_add_device_later(s, 1);
874         }
875  release:
876         release_firmware(fw);
877
878         return (ret);
879 }
880
881 #else /* !CONFIG_PCMCIA_LOAD_CIS */
882
883 static inline int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
884 {
885         return -ENODEV;
886 }
887
888 #endif
889
890
891 static inline int pcmcia_devmatch(struct pcmcia_device *dev,
892                                   struct pcmcia_device_id *did)
893 {
894         if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
895                 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
896                         return 0;
897         }
898
899         if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
900                 if ((!dev->has_card_id) || (dev->card_id != did->card_id))
901                         return 0;
902         }
903
904         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
905                 if (dev->func != did->function)
906                         return 0;
907         }
908
909         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
910                 if (!dev->prod_id[0])
911                         return 0;
912                 if (strcmp(did->prod_id[0], dev->prod_id[0]))
913                         return 0;
914         }
915
916         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
917                 if (!dev->prod_id[1])
918                         return 0;
919                 if (strcmp(did->prod_id[1], dev->prod_id[1]))
920                         return 0;
921         }
922
923         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
924                 if (!dev->prod_id[2])
925                         return 0;
926                 if (strcmp(did->prod_id[2], dev->prod_id[2]))
927                         return 0;
928         }
929
930         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
931                 if (!dev->prod_id[3])
932                         return 0;
933                 if (strcmp(did->prod_id[3], dev->prod_id[3]))
934                         return 0;
935         }
936
937         if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
938                 if (dev->device_no != did->device_no)
939                         return 0;
940         }
941
942         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
943                 if ((!dev->has_func_id) || (dev->func_id != did->func_id))
944                         return 0;
945
946                 /* if this is a pseudo-multi-function device,
947                  * we need explicit matches */
948                 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO)
949                         return 0;
950                 if (dev->device_no)
951                         return 0;
952
953                 /* also, FUNC_ID matching needs to be activated by userspace
954                  * after it has re-checked that there is no possible module
955                  * with a prod_id/manf_id/card_id match.
956                  */
957                 ds_dev_dbg(0, &dev->dev,
958                         "skipping FUNC_ID match until userspace interaction\n");
959                 if (!dev->allow_func_id_match)
960                         return 0;
961         }
962
963         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
964                 ds_dev_dbg(0, &dev->dev, "device needs a fake CIS\n");
965                 if (!dev->socket->fake_cis)
966                         pcmcia_load_firmware(dev, did->cisfile);
967
968                 if (!dev->socket->fake_cis)
969                         return 0;
970         }
971
972         if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
973                 int i;
974                 for (i=0; i<4; i++)
975                         if (dev->prod_id[i])
976                                 return 0;
977                 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
978                         return 0;
979         }
980
981         dev->dev.driver_data = (void *) did;
982
983         return 1;
984 }
985
986
987 static int pcmcia_bus_match(struct device * dev, struct device_driver * drv) {
988         struct pcmcia_device * p_dev = to_pcmcia_dev(dev);
989         struct pcmcia_driver * p_drv = to_pcmcia_drv(drv);
990         struct pcmcia_device_id *did = p_drv->id_table;
991         struct pcmcia_dynid *dynid;
992
993         /* match dynamic devices first */
994         spin_lock(&p_drv->dynids.lock);
995         list_for_each_entry(dynid, &p_drv->dynids.list, node) {
996                 ds_dev_dbg(3, dev, "trying to match to %s\n", drv->name);
997                 if (pcmcia_devmatch(p_dev, &dynid->id)) {
998                         ds_dev_dbg(0, dev, "matched to %s\n", drv->name);
999                         spin_unlock(&p_drv->dynids.lock);
1000                         return 1;
1001                 }
1002         }
1003         spin_unlock(&p_drv->dynids.lock);
1004
1005 #ifdef CONFIG_PCMCIA_IOCTL
1006         /* matching by cardmgr */
1007         if (p_dev->cardmgr == p_drv) {
1008                 ds_dev_dbg(0, dev, "cardmgr matched to %s\n", drv->name);
1009                 return 1;
1010         }
1011 #endif
1012
1013         while (did && did->match_flags) {
1014                 ds_dev_dbg(3, dev, "trying to match to %s\n", drv->name);
1015                 if (pcmcia_devmatch(p_dev, did)) {
1016                         ds_dev_dbg(0, dev, "matched to %s\n", drv->name);
1017                         return 1;
1018                 }
1019                 did++;
1020         }
1021
1022         return 0;
1023 }
1024
1025 #ifdef CONFIG_HOTPLUG
1026
1027 static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
1028 {
1029         struct pcmcia_device *p_dev;
1030         int i;
1031         u32 hash[4] = { 0, 0, 0, 0};
1032
1033         if (!dev)
1034                 return -ENODEV;
1035
1036         p_dev = to_pcmcia_dev(dev);
1037
1038         /* calculate hashes */
1039         for (i=0; i<4; i++) {
1040                 if (!p_dev->prod_id[i])
1041                         continue;
1042                 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
1043         }
1044
1045         if (add_uevent_var(env, "SOCKET_NO=%u", p_dev->socket->sock))
1046                 return -ENOMEM;
1047
1048         if (add_uevent_var(env, "DEVICE_NO=%02X", p_dev->device_no))
1049                 return -ENOMEM;
1050
1051         if (add_uevent_var(env, "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
1052                            "pa%08Xpb%08Xpc%08Xpd%08X",
1053                            p_dev->has_manf_id ? p_dev->manf_id : 0,
1054                            p_dev->has_card_id ? p_dev->card_id : 0,
1055                            p_dev->has_func_id ? p_dev->func_id : 0,
1056                            p_dev->func,
1057                            p_dev->device_no,
1058                            hash[0],
1059                            hash[1],
1060                            hash[2],
1061                            hash[3]))
1062                 return -ENOMEM;
1063
1064         return 0;
1065 }
1066
1067 #else
1068
1069 static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
1070 {
1071         return -ENODEV;
1072 }
1073
1074 #endif
1075
1076 /************************ runtime PM support ***************************/
1077
1078 static int pcmcia_dev_suspend(struct device *dev, pm_message_t state);
1079 static int pcmcia_dev_resume(struct device *dev);
1080
1081 static int runtime_suspend(struct device *dev)
1082 {
1083         int rc;
1084
1085         down(&dev->sem);
1086         rc = pcmcia_dev_suspend(dev, PMSG_SUSPEND);
1087         up(&dev->sem);
1088         return rc;
1089 }
1090
1091 static void runtime_resume(struct device *dev)
1092 {
1093         int rc;
1094
1095         down(&dev->sem);
1096         rc = pcmcia_dev_resume(dev);
1097         up(&dev->sem);
1098 }
1099
1100 /************************ per-device sysfs output ***************************/
1101
1102 #define pcmcia_device_attr(field, test, format)                         \
1103 static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf)              \
1104 {                                                                       \
1105         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);               \
1106         return p_dev->test ? sprintf (buf, format, p_dev->field) : -ENODEV; \
1107 }
1108
1109 #define pcmcia_device_stringattr(name, field)                                   \
1110 static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf)               \
1111 {                                                                       \
1112         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);               \
1113         return p_dev->field ? sprintf (buf, "%s\n", p_dev->field) : -ENODEV; \
1114 }
1115
1116 pcmcia_device_attr(func, socket, "0x%02x\n");
1117 pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
1118 pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
1119 pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
1120 pcmcia_device_stringattr(prod_id1, prod_id[0]);
1121 pcmcia_device_stringattr(prod_id2, prod_id[1]);
1122 pcmcia_device_stringattr(prod_id3, prod_id[2]);
1123 pcmcia_device_stringattr(prod_id4, prod_id[3]);
1124
1125
1126 static ssize_t pcmcia_show_pm_state(struct device *dev, struct device_attribute *attr, char *buf)
1127 {
1128         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1129
1130         if (p_dev->suspended)
1131                 return sprintf(buf, "off\n");
1132         else
1133                 return sprintf(buf, "on\n");
1134 }
1135
1136 static ssize_t pcmcia_store_pm_state(struct device *dev, struct device_attribute *attr,
1137                                      const char *buf, size_t count)
1138 {
1139         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1140         int ret = 0;
1141
1142         if (!count)
1143                 return -EINVAL;
1144
1145         if ((!p_dev->suspended) && !strncmp(buf, "off", 3))
1146                 ret = runtime_suspend(dev);
1147         else if (p_dev->suspended && !strncmp(buf, "on", 2))
1148                 runtime_resume(dev);
1149
1150         return ret ? ret : count;
1151 }
1152
1153
1154 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1155 {
1156         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1157         int i;
1158         u32 hash[4] = { 0, 0, 0, 0};
1159
1160         /* calculate hashes */
1161         for (i=0; i<4; i++) {
1162                 if (!p_dev->prod_id[i])
1163                         continue;
1164                 hash[i] = crc32(0,p_dev->prod_id[i],strlen(p_dev->prod_id[i]));
1165         }
1166         return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
1167                                 "pa%08Xpb%08Xpc%08Xpd%08X\n",
1168                                 p_dev->has_manf_id ? p_dev->manf_id : 0,
1169                                 p_dev->has_card_id ? p_dev->card_id : 0,
1170                                 p_dev->has_func_id ? p_dev->func_id : 0,
1171                                 p_dev->func, p_dev->device_no,
1172                                 hash[0], hash[1], hash[2], hash[3]);
1173 }
1174
1175 static ssize_t pcmcia_store_allow_func_id_match(struct device *dev,
1176                 struct device_attribute *attr, const char *buf, size_t count)
1177 {
1178         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1179         int ret;
1180
1181         if (!count)
1182                 return -EINVAL;
1183
1184         mutex_lock(&p_dev->socket->skt_mutex);
1185         p_dev->allow_func_id_match = 1;
1186         mutex_unlock(&p_dev->socket->skt_mutex);
1187
1188         ret = bus_rescan_devices(&pcmcia_bus_type);
1189         if (ret)
1190                 printk(KERN_INFO "pcmcia: bus_rescan_devices failed after "
1191                        "allowing func_id matches\n");
1192
1193         return count;
1194 }
1195
1196 static struct device_attribute pcmcia_dev_attrs[] = {
1197         __ATTR(function, 0444, func_show, NULL),
1198         __ATTR(pm_state, 0644, pcmcia_show_pm_state, pcmcia_store_pm_state),
1199         __ATTR_RO(func_id),
1200         __ATTR_RO(manf_id),
1201         __ATTR_RO(card_id),
1202         __ATTR_RO(prod_id1),
1203         __ATTR_RO(prod_id2),
1204         __ATTR_RO(prod_id3),
1205         __ATTR_RO(prod_id4),
1206         __ATTR_RO(modalias),
1207         __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match),
1208         __ATTR_NULL,
1209 };
1210
1211 /* PM support, also needed for reset */
1212
1213 static int pcmcia_dev_suspend(struct device * dev, pm_message_t state)
1214 {
1215         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1216         struct pcmcia_driver *p_drv = NULL;
1217         int ret = 0;
1218
1219         if (p_dev->suspended)
1220                 return 0;
1221
1222         ds_dev_dbg(2, dev, "suspending\n");
1223
1224         if (dev->driver)
1225                 p_drv = to_pcmcia_drv(dev->driver);
1226
1227         if (!p_drv)
1228                 goto out;
1229
1230         if (p_drv->suspend) {
1231                 ret = p_drv->suspend(p_dev);
1232                 if (ret) {
1233                         dev_printk(KERN_ERR, dev,
1234                                    "pcmcia: device %s (driver %s) did "
1235                                    "not want to go to sleep (%d)\n",
1236                                    p_dev->devname, p_drv->drv.name, ret);
1237                         goto out;
1238                 }
1239         }
1240
1241         if (p_dev->device_no == p_dev->func) {
1242                 ds_dev_dbg(2, dev, "releasing configuration\n");
1243                 pcmcia_release_configuration(p_dev);
1244         }
1245
1246  out:
1247         if (!ret)
1248                 p_dev->suspended = 1;
1249         return ret;
1250 }
1251
1252
1253 static int pcmcia_dev_resume(struct device * dev)
1254 {
1255         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1256         struct pcmcia_driver *p_drv = NULL;
1257         int ret = 0;
1258
1259         if (!p_dev->suspended)
1260                 return 0;
1261
1262         ds_dev_dbg(2, dev, "resuming\n");
1263
1264         if (dev->driver)
1265                 p_drv = to_pcmcia_drv(dev->driver);
1266
1267         if (!p_drv)
1268                 goto out;
1269
1270         if (p_dev->device_no == p_dev->func) {
1271                 ds_dev_dbg(2, dev, "requesting configuration\n");
1272                 ret = pcmcia_request_configuration(p_dev, &p_dev->conf);
1273                 if (ret)
1274                         goto out;
1275         }
1276
1277         if (p_drv->resume)
1278                 ret = p_drv->resume(p_dev);
1279
1280  out:
1281         if (!ret)
1282                 p_dev->suspended = 0;
1283         return ret;
1284 }
1285
1286
1287 static int pcmcia_bus_suspend_callback(struct device *dev, void * _data)
1288 {
1289         struct pcmcia_socket *skt = _data;
1290         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1291
1292         if (p_dev->socket != skt || p_dev->suspended)
1293                 return 0;
1294
1295         return runtime_suspend(dev);
1296 }
1297
1298 static int pcmcia_bus_resume_callback(struct device *dev, void * _data)
1299 {
1300         struct pcmcia_socket *skt = _data;
1301         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1302
1303         if (p_dev->socket != skt || !p_dev->suspended)
1304                 return 0;
1305
1306         runtime_resume(dev);
1307
1308         return 0;
1309 }
1310
1311 static int pcmcia_bus_resume(struct pcmcia_socket *skt)
1312 {
1313         ds_dev_dbg(2, &skt->dev, "resuming socket %d\n", skt->sock);
1314         bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback);
1315         return 0;
1316 }
1317
1318 static int pcmcia_bus_suspend(struct pcmcia_socket *skt)
1319 {
1320         ds_dev_dbg(2, &skt->dev, "suspending socket %d\n", skt->sock);
1321         if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt,
1322                              pcmcia_bus_suspend_callback)) {
1323                 pcmcia_bus_resume(skt);
1324                 return -EIO;
1325         }
1326         return 0;
1327 }
1328
1329
1330 /*======================================================================
1331
1332     The card status event handler.
1333     
1334 ======================================================================*/
1335
1336 /* Normally, the event is passed to individual drivers after
1337  * informing userspace. Only for CS_EVENT_CARD_REMOVAL this
1338  * is inversed to maintain historic compatibility.
1339  */
1340
1341 static int ds_event(struct pcmcia_socket *skt, event_t event, int priority)
1342 {
1343         struct pcmcia_socket *s = pcmcia_get_socket(skt);
1344
1345         if (!s) {
1346                 dev_printk(KERN_ERR, &skt->dev,
1347                            "PCMCIA obtaining reference to socket "      \
1348                            "failed, event 0x%x lost!\n", event);
1349                 return -ENODEV;
1350         }
1351
1352         ds_dev_dbg(1, &skt->dev, "ds_event(0x%06x, %d, 0x%p)\n",
1353                    event, priority, skt);
1354
1355         switch (event) {
1356         case CS_EVENT_CARD_REMOVAL:
1357                 s->pcmcia_state.present = 0;
1358                 pcmcia_card_remove(skt, NULL);
1359                 handle_event(skt, event);
1360                 break;
1361
1362         case CS_EVENT_CARD_INSERTION:
1363                 s->pcmcia_state.present = 1;
1364                 pcmcia_card_add(skt);
1365                 handle_event(skt, event);
1366                 break;
1367
1368         case CS_EVENT_EJECTION_REQUEST:
1369                 break;
1370
1371         case CS_EVENT_PM_SUSPEND:
1372         case CS_EVENT_PM_RESUME:
1373         case CS_EVENT_RESET_PHYSICAL:
1374         case CS_EVENT_CARD_RESET:
1375         default:
1376                 handle_event(skt, event);
1377                 break;
1378     }
1379
1380     pcmcia_put_socket(s);
1381
1382     return 0;
1383 } /* ds_event */
1384
1385
1386 struct pcmcia_device * pcmcia_dev_present(struct pcmcia_device *_p_dev)
1387 {
1388         struct pcmcia_device *p_dev;
1389         struct pcmcia_device *ret = NULL;
1390
1391         p_dev = pcmcia_get_dev(_p_dev);
1392         if (!p_dev)
1393                 return NULL;
1394
1395         if (!p_dev->socket->pcmcia_state.present)
1396                 goto out;
1397
1398         if (p_dev->_removed)
1399                 goto out;
1400
1401         if (p_dev->suspended)
1402                 goto out;
1403
1404         ret = p_dev;
1405  out:
1406         pcmcia_put_dev(p_dev);
1407         return ret;
1408 }
1409 EXPORT_SYMBOL(pcmcia_dev_present);
1410
1411
1412 static struct pcmcia_callback pcmcia_bus_callback = {
1413         .owner = THIS_MODULE,
1414         .event = ds_event,
1415         .requery = pcmcia_bus_rescan,
1416         .suspend = pcmcia_bus_suspend,
1417         .resume = pcmcia_bus_resume,
1418 };
1419
1420 static int __devinit pcmcia_bus_add_socket(struct device *dev,
1421                                            struct class_interface *class_intf)
1422 {
1423         struct pcmcia_socket *socket = dev_get_drvdata(dev);
1424         int ret;
1425
1426         socket = pcmcia_get_socket(socket);
1427         if (!socket) {
1428                 dev_printk(KERN_ERR, dev,
1429                            "PCMCIA obtaining reference to socket failed\n");
1430                 return -ENODEV;
1431         }
1432
1433         /*
1434          * Ugly. But we want to wait for the socket threads to have started up.
1435          * We really should let the drivers themselves drive some of this..
1436          */
1437         msleep(250);
1438
1439 #ifdef CONFIG_PCMCIA_IOCTL
1440         init_waitqueue_head(&socket->queue);
1441 #endif
1442         INIT_LIST_HEAD(&socket->devices_list);
1443         INIT_WORK(&socket->device_add, pcmcia_delayed_add_device);
1444         memset(&socket->pcmcia_state, 0, sizeof(u8));
1445         socket->device_count = 0;
1446
1447         ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback);
1448         if (ret) {
1449                 dev_printk(KERN_ERR, dev, "PCMCIA registration failed\n");
1450                 pcmcia_put_socket(socket);
1451                 return (ret);
1452         }
1453
1454         return 0;
1455 }
1456
1457 static void pcmcia_bus_remove_socket(struct device *dev,
1458                                      struct class_interface *class_intf)
1459 {
1460         struct pcmcia_socket *socket = dev_get_drvdata(dev);
1461
1462         if (!socket)
1463                 return;
1464
1465         socket->pcmcia_state.dead = 1;
1466         pccard_register_pcmcia(socket, NULL);
1467
1468         /* unregister any unbound devices */
1469         mutex_lock(&socket->skt_mutex);
1470         pcmcia_card_remove(socket, NULL);
1471         mutex_unlock(&socket->skt_mutex);
1472
1473         pcmcia_put_socket(socket);
1474
1475         return;
1476 }
1477
1478
1479 /* the pcmcia_bus_interface is used to handle pcmcia socket devices */
1480 static struct class_interface pcmcia_bus_interface __refdata = {
1481         .class = &pcmcia_socket_class,
1482         .add_dev = &pcmcia_bus_add_socket,
1483         .remove_dev = &pcmcia_bus_remove_socket,
1484 };
1485
1486
1487 struct bus_type pcmcia_bus_type = {
1488         .name = "pcmcia",
1489         .uevent = pcmcia_bus_uevent,
1490         .match = pcmcia_bus_match,
1491         .dev_attrs = pcmcia_dev_attrs,
1492         .probe = pcmcia_device_probe,
1493         .remove = pcmcia_device_remove,
1494         .suspend = pcmcia_dev_suspend,
1495         .resume = pcmcia_dev_resume,
1496 };
1497
1498
1499 static int __init init_pcmcia_bus(void)
1500 {
1501         int ret;
1502
1503         spin_lock_init(&pcmcia_dev_list_lock);
1504
1505         ret = bus_register(&pcmcia_bus_type);
1506         if (ret < 0) {
1507                 printk(KERN_WARNING "pcmcia: bus_register error: %d\n", ret);
1508                 return ret;
1509         }
1510         ret = class_interface_register(&pcmcia_bus_interface);
1511         if (ret < 0) {
1512                 printk(KERN_WARNING
1513                         "pcmcia: class_interface_register error: %d\n", ret);
1514                 bus_unregister(&pcmcia_bus_type);
1515                 return ret;
1516         }
1517
1518         pcmcia_setup_ioctl();
1519
1520         return 0;
1521 }
1522 fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that 
1523                                * pcmcia_socket_class is already registered */
1524
1525
1526 static void __exit exit_pcmcia_bus(void)
1527 {
1528         pcmcia_cleanup_ioctl();
1529
1530         class_interface_unregister(&pcmcia_bus_interface);
1531
1532         bus_unregister(&pcmcia_bus_type);
1533 }
1534 module_exit(exit_pcmcia_bus);
1535
1536
1537 MODULE_ALIAS("ds");