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[linux-3.10.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 - 2005      Dominik Brodowski
14  */
15
16 #include <linux/config.h>
17 #include <linux/kernel.h>
18 #include <linux/module.h>
19 #include <linux/init.h>
20 #include <linux/errno.h>
21 #include <linux/list.h>
22 #include <linux/delay.h>
23 #include <linux/workqueue.h>
24 #include <linux/crc32.h>
25 #include <linux/firmware.h>
26
27 #define IN_CARD_SERVICES
28 #include <pcmcia/cs_types.h>
29 #include <pcmcia/cs.h>
30 #include <pcmcia/cistpl.h>
31 #include <pcmcia/ds.h>
32 #include <pcmcia/ss.h>
33
34 #include "cs_internal.h"
35 #include "ds_internal.h"
36
37 /*====================================================================*/
38
39 /* Module parameters */
40
41 MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
42 MODULE_DESCRIPTION("PCMCIA Driver Services");
43 MODULE_LICENSE("GPL");
44
45 #ifdef DEBUG
46 int ds_pc_debug;
47
48 module_param_named(pc_debug, ds_pc_debug, int, 0644);
49
50 #define ds_dbg(lvl, fmt, arg...) do {                           \
51         if (ds_pc_debug > (lvl))                                        \
52                 printk(KERN_DEBUG "ds: " fmt , ## arg);         \
53 } while (0)
54 #else
55 #define ds_dbg(lvl, fmt, arg...) do { } while (0)
56 #endif
57
58 spinlock_t pcmcia_dev_list_lock;
59
60 static int unbind_request(struct pcmcia_socket *s);
61
62 /*====================================================================*/
63
64 /* code which was in cs.c before */
65
66 /* String tables for error messages */
67
68 typedef struct lookup_t {
69     int key;
70     char *msg;
71 } lookup_t;
72
73 static const lookup_t error_table[] = {
74     { CS_SUCCESS,               "Operation succeeded" },
75     { CS_BAD_ADAPTER,           "Bad adapter" },
76     { CS_BAD_ATTRIBUTE,         "Bad attribute", },
77     { CS_BAD_BASE,              "Bad base address" },
78     { CS_BAD_EDC,               "Bad EDC" },
79     { CS_BAD_IRQ,               "Bad IRQ" },
80     { CS_BAD_OFFSET,            "Bad offset" },
81     { CS_BAD_PAGE,              "Bad page number" },
82     { CS_READ_FAILURE,          "Read failure" },
83     { CS_BAD_SIZE,              "Bad size" },
84     { CS_BAD_SOCKET,            "Bad socket" },
85     { CS_BAD_TYPE,              "Bad type" },
86     { CS_BAD_VCC,               "Bad Vcc" },
87     { CS_BAD_VPP,               "Bad Vpp" },
88     { CS_BAD_WINDOW,            "Bad window" },
89     { CS_WRITE_FAILURE,         "Write failure" },
90     { CS_NO_CARD,               "No card present" },
91     { CS_UNSUPPORTED_FUNCTION,  "Usupported function" },
92     { CS_UNSUPPORTED_MODE,      "Unsupported mode" },
93     { CS_BAD_SPEED,             "Bad speed" },
94     { CS_BUSY,                  "Resource busy" },
95     { CS_GENERAL_FAILURE,       "General failure" },
96     { CS_WRITE_PROTECTED,       "Write protected" },
97     { CS_BAD_ARG_LENGTH,        "Bad argument length" },
98     { CS_BAD_ARGS,              "Bad arguments" },
99     { CS_CONFIGURATION_LOCKED,  "Configuration locked" },
100     { CS_IN_USE,                "Resource in use" },
101     { CS_NO_MORE_ITEMS,         "No more items" },
102     { CS_OUT_OF_RESOURCE,       "Out of resource" },
103     { CS_BAD_HANDLE,            "Bad handle" },
104     { CS_BAD_TUPLE,             "Bad CIS tuple" }
105 };
106
107
108 static const lookup_t service_table[] = {
109     { AccessConfigurationRegister,      "AccessConfigurationRegister" },
110     { AddSocketServices,                "AddSocketServices" },
111     { AdjustResourceInfo,               "AdjustResourceInfo" },
112     { CheckEraseQueue,                  "CheckEraseQueue" },
113     { CloseMemory,                      "CloseMemory" },
114     { DeregisterClient,                 "DeregisterClient" },
115     { DeregisterEraseQueue,             "DeregisterEraseQueue" },
116     { GetCardServicesInfo,              "GetCardServicesInfo" },
117     { GetClientInfo,                    "GetClientInfo" },
118     { GetConfigurationInfo,             "GetConfigurationInfo" },
119     { GetEventMask,                     "GetEventMask" },
120     { GetFirstClient,                   "GetFirstClient" },
121     { GetFirstRegion,                   "GetFirstRegion" },
122     { GetFirstTuple,                    "GetFirstTuple" },
123     { GetNextClient,                    "GetNextClient" },
124     { GetNextRegion,                    "GetNextRegion" },
125     { GetNextTuple,                     "GetNextTuple" },
126     { GetStatus,                        "GetStatus" },
127     { GetTupleData,                     "GetTupleData" },
128     { MapMemPage,                       "MapMemPage" },
129     { ModifyConfiguration,              "ModifyConfiguration" },
130     { ModifyWindow,                     "ModifyWindow" },
131     { OpenMemory,                       "OpenMemory" },
132     { ParseTuple,                       "ParseTuple" },
133     { ReadMemory,                       "ReadMemory" },
134     { RegisterClient,                   "RegisterClient" },
135     { RegisterEraseQueue,               "RegisterEraseQueue" },
136     { RegisterMTD,                      "RegisterMTD" },
137     { ReleaseConfiguration,             "ReleaseConfiguration" },
138     { ReleaseIO,                        "ReleaseIO" },
139     { ReleaseIRQ,                       "ReleaseIRQ" },
140     { ReleaseWindow,                    "ReleaseWindow" },
141     { RequestConfiguration,             "RequestConfiguration" },
142     { RequestIO,                        "RequestIO" },
143     { RequestIRQ,                       "RequestIRQ" },
144     { RequestSocketMask,                "RequestSocketMask" },
145     { RequestWindow,                    "RequestWindow" },
146     { ResetCard,                        "ResetCard" },
147     { SetEventMask,                     "SetEventMask" },
148     { ValidateCIS,                      "ValidateCIS" },
149     { WriteMemory,                      "WriteMemory" },
150     { BindDevice,                       "BindDevice" },
151     { BindMTD,                          "BindMTD" },
152     { ReportError,                      "ReportError" },
153     { SuspendCard,                      "SuspendCard" },
154     { ResumeCard,                       "ResumeCard" },
155     { EjectCard,                        "EjectCard" },
156     { InsertCard,                       "InsertCard" },
157     { ReplaceCIS,                       "ReplaceCIS" }
158 };
159
160
161 static int pcmcia_report_error(client_handle_t handle, error_info_t *err)
162 {
163         int i;
164         char *serv;
165
166         if (CHECK_HANDLE(handle))
167                 printk(KERN_NOTICE);
168         else {
169                 struct pcmcia_device *p_dev = handle_to_pdev(handle);
170                 printk(KERN_NOTICE "%s: ", p_dev->dev.bus_id);
171         }
172
173         for (i = 0; i < ARRAY_SIZE(service_table); i++)
174                 if (service_table[i].key == err->func)
175                         break;
176         if (i < ARRAY_SIZE(service_table))
177                 serv = service_table[i].msg;
178         else
179                 serv = "Unknown service number";
180
181         for (i = 0; i < ARRAY_SIZE(error_table); i++)
182                 if (error_table[i].key == err->retcode)
183                         break;
184         if (i < ARRAY_SIZE(error_table))
185                 printk("%s: %s\n", serv, error_table[i].msg);
186         else
187                 printk("%s: Unknown error code %#x\n", serv, err->retcode);
188
189         return CS_SUCCESS;
190 } /* report_error */
191
192 /* end of code which was in cs.c before */
193
194 /*======================================================================*/
195
196 void cs_error(client_handle_t handle, int func, int ret)
197 {
198         error_info_t err = { func, ret };
199         pcmcia_report_error(handle, &err);
200 }
201 EXPORT_SYMBOL(cs_error);
202
203
204 static void pcmcia_check_driver(struct pcmcia_driver *p_drv)
205 {
206         struct pcmcia_device_id *did = p_drv->id_table;
207         unsigned int i;
208         u32 hash;
209
210         while (did && did->match_flags) {
211                 for (i=0; i<4; i++) {
212                         if (!did->prod_id[i])
213                                 continue;
214
215                         hash = crc32(0, did->prod_id[i], strlen(did->prod_id[i]));
216                         if (hash == did->prod_id_hash[i])
217                                 continue;
218
219                         printk(KERN_DEBUG "pcmcia: %s: invalid hash for "
220                                "product string \"%s\": is 0x%x, should "
221                                "be 0x%x\n", p_drv->drv.name, did->prod_id[i],
222                                did->prod_id_hash[i], hash);
223                         printk(KERN_DEBUG "pcmcia: see "
224                                 "Documentation/pcmcia/devicetable.txt for "
225                                 "details\n");
226                 }
227                 did++;
228         }
229
230         return;
231 }
232
233
234 #ifdef CONFIG_PCMCIA_LOAD_CIS
235
236 /**
237  * pcmcia_load_firmware - load CIS from userspace if device-provided is broken
238  * @dev - the pcmcia device which needs a CIS override
239  * @filename - requested filename in /lib/firmware/cis/
240  *
241  * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if
242  * the one provided by the card is broken. The firmware files reside in
243  * /lib/firmware/cis/ in userspace.
244  */
245 static int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
246 {
247         struct pcmcia_socket *s = dev->socket;
248         const struct firmware *fw;
249         char path[20];
250         int ret=-ENOMEM;
251         cisdump_t *cis;
252
253         if (!filename)
254                 return -EINVAL;
255
256         ds_dbg(1, "trying to load firmware %s\n", filename);
257
258         if (strlen(filename) > 14)
259                 return -EINVAL;
260
261         snprintf(path, 20, "%s", filename);
262
263         if (request_firmware(&fw, path, &dev->dev) == 0) {
264                 if (fw->size >= CISTPL_MAX_CIS_SIZE)
265                         goto release;
266
267                 cis = kmalloc(sizeof(cisdump_t), GFP_KERNEL);
268                 if (!cis)
269                         goto release;
270
271                 memset(cis, 0, sizeof(cisdump_t));
272
273                 cis->Length = fw->size + 1;
274                 memcpy(cis->Data, fw->data, fw->size);
275
276                 if (!pcmcia_replace_cis(s, cis))
277                         ret = 0;
278         }
279  release:
280         release_firmware(fw);
281
282         return (ret);
283 }
284
285 #else /* !CONFIG_PCMCIA_LOAD_CIS */
286
287 static inline int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
288 {
289         return -ENODEV;
290 }
291
292 #endif
293
294
295 /*======================================================================*/
296
297
298 /**
299  * pcmcia_register_driver - register a PCMCIA driver with the bus core
300  *
301  * Registers a PCMCIA driver with the PCMCIA bus core.
302  */
303 static int pcmcia_device_probe(struct device *dev);
304 static int pcmcia_device_remove(struct device * dev);
305
306 int pcmcia_register_driver(struct pcmcia_driver *driver)
307 {
308         if (!driver)
309                 return -EINVAL;
310
311         pcmcia_check_driver(driver);
312
313         /* initialize common fields */
314         driver->drv.bus = &pcmcia_bus_type;
315         driver->drv.owner = driver->owner;
316         driver->drv.probe = pcmcia_device_probe;
317         driver->drv.remove = pcmcia_device_remove;
318
319         return driver_register(&driver->drv);
320 }
321 EXPORT_SYMBOL(pcmcia_register_driver);
322
323 /**
324  * pcmcia_unregister_driver - unregister a PCMCIA driver with the bus core
325  */
326 void pcmcia_unregister_driver(struct pcmcia_driver *driver)
327 {
328         driver_unregister(&driver->drv);
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_dev(struct device *dev)
351 {
352         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
353         ds_dbg(1, "releasing dev %p\n", p_dev);
354         pcmcia_put_socket(p_dev->socket);
355         kfree(p_dev);
356 }
357
358
359 static int pcmcia_device_probe(struct device * dev)
360 {
361         struct pcmcia_device *p_dev;
362         struct pcmcia_driver *p_drv;
363         int ret = 0;
364
365         dev = get_device(dev);
366         if (!dev)
367                 return -ENODEV;
368
369         p_dev = to_pcmcia_dev(dev);
370         p_drv = to_pcmcia_drv(dev->driver);
371
372         if (!try_module_get(p_drv->owner)) {
373                 ret = -EINVAL;
374                 goto put_dev;
375         }
376
377         if (p_drv->attach) {
378                 p_dev->instance = p_drv->attach();
379                 if ((!p_dev->instance) || (p_dev->client.state & CLIENT_UNBOUND)) {
380                         printk(KERN_NOTICE "ds: unable to create instance "
381                                "of '%s'!\n", p_drv->drv.name);
382                         ret = -EINVAL;
383                 }
384         }
385
386         if (ret)
387                 module_put(p_drv->owner);
388  put_dev:
389         if ((ret) || !(p_drv->attach))
390                 put_device(dev);
391         return (ret);
392 }
393
394
395 static int pcmcia_device_remove(struct device * dev)
396 {
397         struct pcmcia_device *p_dev;
398         struct pcmcia_driver *p_drv;
399
400         /* detach the "instance" */
401         p_dev = to_pcmcia_dev(dev);
402         p_drv = to_pcmcia_drv(dev->driver);
403
404         if (p_drv) {
405                 if ((p_drv->detach) && (p_dev->instance)) {
406                         p_drv->detach(p_dev->instance);
407                         /* from pcmcia_probe_device */
408                         put_device(&p_dev->dev);
409                 }
410                 module_put(p_drv->owner);
411         }
412
413         return 0;
414 }
415
416
417
418 /*
419  * pcmcia_device_query -- determine information about a pcmcia device
420  */
421 static int pcmcia_device_query(struct pcmcia_device *p_dev)
422 {
423         cistpl_manfid_t manf_id;
424         cistpl_funcid_t func_id;
425         cistpl_vers_1_t vers1;
426         unsigned int i;
427
428         if (!pccard_read_tuple(p_dev->socket, p_dev->func,
429                                CISTPL_MANFID, &manf_id)) {
430                 p_dev->manf_id = manf_id.manf;
431                 p_dev->card_id = manf_id.card;
432                 p_dev->has_manf_id = 1;
433                 p_dev->has_card_id = 1;
434         }
435
436         if (!pccard_read_tuple(p_dev->socket, p_dev->func,
437                                CISTPL_FUNCID, &func_id)) {
438                 p_dev->func_id = func_id.func;
439                 p_dev->has_func_id = 1;
440         } else {
441                 /* rule of thumb: cards with no FUNCID, but with
442                  * common memory device geometry information, are
443                  * probably memory cards (from pcmcia-cs) */
444                 cistpl_device_geo_t devgeo;
445                 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
446                                       CISTPL_DEVICE_GEO, &devgeo)) {
447                         ds_dbg(0, "mem device geometry probably means "
448                                "FUNCID_MEMORY\n");
449                         p_dev->func_id = CISTPL_FUNCID_MEMORY;
450                         p_dev->has_func_id = 1;
451                 }
452         }
453
454         if (!pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_VERS_1,
455                                &vers1)) {
456                 for (i=0; i < vers1.ns; i++) {
457                         char *tmp;
458                         unsigned int length;
459
460                         tmp = vers1.str + vers1.ofs[i];
461
462                         length = strlen(tmp) + 1;
463                         if ((length < 3) || (length > 255))
464                                 continue;
465
466                         p_dev->prod_id[i] = kmalloc(sizeof(char) * length,
467                                                     GFP_KERNEL);
468                         if (!p_dev->prod_id[i])
469                                 continue;
470
471                         p_dev->prod_id[i] = strncpy(p_dev->prod_id[i],
472                                                     tmp, length);
473                 }
474         }
475
476         return 0;
477 }
478
479
480 /* device_add_lock is needed to avoid double registration by cardmgr and kernel.
481  * Serializes pcmcia_device_add; will most likely be removed in future.
482  *
483  * While it has the caveat that adding new PCMCIA devices inside(!) device_register()
484  * won't work, this doesn't matter much at the moment: the driver core doesn't
485  * support it either.
486  */
487 static DECLARE_MUTEX(device_add_lock);
488
489 struct pcmcia_device * pcmcia_device_add(struct pcmcia_socket *s, unsigned int function)
490 {
491         struct pcmcia_device *p_dev;
492         unsigned long flags;
493
494         s = pcmcia_get_socket(s);
495         if (!s)
496                 return NULL;
497
498         down(&device_add_lock);
499
500         /* max of 2 devices per card */
501         if (s->device_count == 2)
502                 goto err_put;
503
504         p_dev = kmalloc(sizeof(struct pcmcia_device), GFP_KERNEL);
505         if (!p_dev)
506                 goto err_put;
507         memset(p_dev, 0, sizeof(struct pcmcia_device));
508
509         p_dev->socket = s;
510         p_dev->device_no = (s->device_count++);
511         p_dev->func   = function;
512
513         p_dev->dev.bus = &pcmcia_bus_type;
514         p_dev->dev.parent = s->dev.dev;
515         p_dev->dev.release = pcmcia_release_dev;
516         sprintf (p_dev->dev.bus_id, "%d.%d", p_dev->socket->sock, p_dev->device_no);
517
518         /* compat */
519         p_dev->client.client_magic = CLIENT_MAGIC;
520         p_dev->client.Socket = s;
521         p_dev->client.Function = function;
522         p_dev->client.state = CLIENT_UNBOUND;
523
524         /* Add to the list in pcmcia_bus_socket */
525         spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
526         list_add_tail(&p_dev->socket_device_list, &s->devices_list);
527         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
528
529         pcmcia_device_query(p_dev);
530
531         if (device_register(&p_dev->dev)) {
532                 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
533                 list_del(&p_dev->socket_device_list);
534                 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
535
536                 goto err_free;
537        }
538
539         up(&device_add_lock);
540
541         return p_dev;
542
543  err_free:
544         kfree(p_dev);
545         s->device_count--;
546  err_put:
547         up(&device_add_lock);
548         pcmcia_put_socket(s);
549
550         return NULL;
551 }
552
553
554 static int pcmcia_card_add(struct pcmcia_socket *s)
555 {
556         cisinfo_t cisinfo;
557         cistpl_longlink_mfc_t mfc;
558         unsigned int no_funcs, i;
559         int ret = 0;
560
561         if (!(s->resource_setup_done))
562                 return -EAGAIN; /* try again, but later... */
563
564         pcmcia_validate_mem(s);
565         ret = pccard_validate_cis(s, BIND_FN_ALL, &cisinfo);
566         if (ret || !cisinfo.Chains) {
567                 ds_dbg(0, "invalid CIS or invalid resources\n");
568                 return -ENODEV;
569         }
570
571         if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
572                 no_funcs = mfc.nfn;
573         else
574                 no_funcs = 1;
575
576         /* this doesn't handle multifunction devices on one pcmcia function
577          * yet. */
578         for (i=0; i < no_funcs; i++)
579                 pcmcia_device_add(s, i);
580
581         return (ret);
582 }
583
584
585 static void pcmcia_delayed_add_pseudo_device(void *data)
586 {
587         struct pcmcia_socket *s = data;
588         pcmcia_device_add(s, 0);
589         s->pcmcia_state.device_add_pending = 0;
590 }
591
592 static inline void pcmcia_add_pseudo_device(struct pcmcia_socket *s)
593 {
594         if (!s->pcmcia_state.device_add_pending) {
595                 schedule_work(&s->device_add);
596                 s->pcmcia_state.device_add_pending = 1;
597         }
598         return;
599 }
600
601 static int pcmcia_requery(struct device *dev, void * _data)
602 {
603         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
604         if (!p_dev->dev.driver)
605                 pcmcia_device_query(p_dev);
606
607         return 0;
608 }
609
610 static void pcmcia_bus_rescan(struct pcmcia_socket *skt)
611 {
612         int no_devices=0;
613         unsigned long flags;
614
615         /* must be called with skt_sem held */
616         spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
617         if (list_empty(&skt->devices_list))
618                 no_devices=1;
619         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
620
621         /* if no devices were added for this socket yet because of
622          * missing resource information or other trouble, we need to
623          * do this now. */
624         if (no_devices) {
625                 int ret = pcmcia_card_add(skt);
626                 if (ret)
627                         return;
628         }
629
630         /* some device information might have changed because of a CIS
631          * update or because we can finally read it correctly... so
632          * determine it again, overwriting old values if necessary. */
633         bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery);
634
635         /* we re-scan all devices, not just the ones connected to this
636          * socket. This does not matter, though. */
637         bus_rescan_devices(&pcmcia_bus_type);
638 }
639
640 static inline int pcmcia_devmatch(struct pcmcia_device *dev,
641                                   struct pcmcia_device_id *did)
642 {
643         if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
644                 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
645                         return 0;
646         }
647
648         if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
649                 if ((!dev->has_card_id) || (dev->card_id != did->card_id))
650                         return 0;
651         }
652
653         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
654                 if (dev->func != did->function)
655                         return 0;
656         }
657
658         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
659                 if (!dev->prod_id[0])
660                         return 0;
661                 if (strcmp(did->prod_id[0], dev->prod_id[0]))
662                         return 0;
663         }
664
665         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
666                 if (!dev->prod_id[1])
667                         return 0;
668                 if (strcmp(did->prod_id[1], dev->prod_id[1]))
669                         return 0;
670         }
671
672         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
673                 if (!dev->prod_id[2])
674                         return 0;
675                 if (strcmp(did->prod_id[2], dev->prod_id[2]))
676                         return 0;
677         }
678
679         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
680                 if (!dev->prod_id[3])
681                         return 0;
682                 if (strcmp(did->prod_id[3], dev->prod_id[3]))
683                         return 0;
684         }
685
686         if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
687                 /* handle pseudo multifunction devices:
688                  * there are at most two pseudo multifunction devices.
689                  * if we're matching against the first, schedule a
690                  * call which will then check whether there are two
691                  * pseudo devices, and if not, add the second one.
692                  */
693                 if (dev->device_no == 0)
694                         pcmcia_add_pseudo_device(dev->socket);
695
696                 if (dev->device_no != did->device_no)
697                         return 0;
698         }
699
700         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
701                 if ((!dev->has_func_id) || (dev->func_id != did->func_id))
702                         return 0;
703
704                 /* if this is a pseudo-multi-function device,
705                  * we need explicit matches */
706                 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO)
707                         return 0;
708                 if (dev->device_no)
709                         return 0;
710
711                 /* also, FUNC_ID matching needs to be activated by userspace
712                  * after it has re-checked that there is no possible module
713                  * with a prod_id/manf_id/card_id match.
714                  */
715                 if (!dev->allow_func_id_match)
716                         return 0;
717         }
718
719         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
720                 if (!dev->socket->fake_cis)
721                         pcmcia_load_firmware(dev, did->cisfile);
722
723                 if (!dev->socket->fake_cis)
724                         return 0;
725         }
726
727         if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
728                 int i;
729                 for (i=0; i<4; i++)
730                         if (dev->prod_id[i])
731                                 return 0;
732                 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
733                         return 0;
734         }
735
736         dev->dev.driver_data = (void *) did;
737
738         return 1;
739 }
740
741
742 static int pcmcia_bus_match(struct device * dev, struct device_driver * drv) {
743         struct pcmcia_device * p_dev = to_pcmcia_dev(dev);
744         struct pcmcia_driver * p_drv = to_pcmcia_drv(drv);
745         struct pcmcia_device_id *did = p_drv->id_table;
746
747         /* matching by cardmgr */
748         if (p_dev->cardmgr == p_drv)
749                 return 1;
750
751         while (did && did->match_flags) {
752                 if (pcmcia_devmatch(p_dev, did))
753                         return 1;
754                 did++;
755         }
756
757         return 0;
758 }
759
760 #ifdef CONFIG_HOTPLUG
761
762 static int pcmcia_bus_hotplug(struct device *dev, char **envp, int num_envp,
763                               char *buffer, int buffer_size)
764 {
765         struct pcmcia_device *p_dev;
766         int i, length = 0;
767         u32 hash[4] = { 0, 0, 0, 0};
768
769         if (!dev)
770                 return -ENODEV;
771
772         p_dev = to_pcmcia_dev(dev);
773
774         /* calculate hashes */
775         for (i=0; i<4; i++) {
776                 if (!p_dev->prod_id[i])
777                         continue;
778                 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
779         }
780
781         i = 0;
782
783         if (add_hotplug_env_var(envp, num_envp, &i,
784                                 buffer, buffer_size, &length,
785                                 "SOCKET_NO=%u",
786                                 p_dev->socket->sock))
787                 return -ENOMEM;
788
789         if (add_hotplug_env_var(envp, num_envp, &i,
790                                 buffer, buffer_size, &length,
791                                 "DEVICE_NO=%02X",
792                                 p_dev->device_no))
793                 return -ENOMEM;
794
795         if (add_hotplug_env_var(envp, num_envp, &i,
796                                 buffer, buffer_size, &length,
797                                 "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
798                                 "pa%08Xpb%08Xpc%08Xpd%08X",
799                                 p_dev->has_manf_id ? p_dev->manf_id : 0,
800                                 p_dev->has_card_id ? p_dev->card_id : 0,
801                                 p_dev->has_func_id ? p_dev->func_id : 0,
802                                 p_dev->func,
803                                 p_dev->device_no,
804                                 hash[0],
805                                 hash[1],
806                                 hash[2],
807                                 hash[3]))
808                 return -ENOMEM;
809
810         envp[i] = NULL;
811
812         return 0;
813 }
814
815 #else
816
817 static int pcmcia_bus_hotplug(struct device *dev, char **envp, int num_envp,
818                               char *buffer, int buffer_size)
819 {
820         return -ENODEV;
821 }
822
823 #endif
824
825 /************************ per-device sysfs output ***************************/
826
827 #define pcmcia_device_attr(field, test, format)                         \
828 static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf)              \
829 {                                                                       \
830         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);               \
831         return p_dev->test ? sprintf (buf, format, p_dev->field) : -ENODEV; \
832 }
833
834 #define pcmcia_device_stringattr(name, field)                                   \
835 static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf)               \
836 {                                                                       \
837         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);               \
838         return p_dev->field ? sprintf (buf, "%s\n", p_dev->field) : -ENODEV; \
839 }
840
841 pcmcia_device_attr(func, socket, "0x%02x\n");
842 pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
843 pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
844 pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
845 pcmcia_device_stringattr(prod_id1, prod_id[0]);
846 pcmcia_device_stringattr(prod_id2, prod_id[1]);
847 pcmcia_device_stringattr(prod_id3, prod_id[2]);
848 pcmcia_device_stringattr(prod_id4, prod_id[3]);
849
850 static ssize_t modalias_show(struct device *dev, char *buf)
851 {
852         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
853         int i;
854         u32 hash[4] = { 0, 0, 0, 0};
855
856         /* calculate hashes */
857         for (i=0; i<4; i++) {
858                 if (!p_dev->prod_id[i])
859                         continue;
860                 hash[i] = crc32(0,p_dev->prod_id[i],strlen(p_dev->prod_id[i]));
861         }
862         return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
863                                 "pa%08Xpb%08Xpc%08Xpd%08X\n",
864                                 p_dev->has_manf_id ? p_dev->manf_id : 0,
865                                 p_dev->has_card_id ? p_dev->card_id : 0,
866                                 p_dev->has_func_id ? p_dev->func_id : 0,
867                                 p_dev->func, p_dev->device_no,
868                                 hash[0], hash[1], hash[2], hash[3]);
869 }
870
871 static ssize_t pcmcia_store_allow_func_id_match(struct device *dev,
872                 struct device_attribute *attr, const char *buf, size_t count)
873 {
874         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
875         if (!count)
876                 return -EINVAL;
877
878         down(&p_dev->socket->skt_sem);
879         p_dev->allow_func_id_match = 1;
880         up(&p_dev->socket->skt_sem);
881
882         bus_rescan_devices(&pcmcia_bus_type);
883
884         return count;
885 }
886
887 static struct device_attribute pcmcia_dev_attrs[] = {
888         __ATTR(function, 0444, func_show, NULL),
889         __ATTR_RO(func_id),
890         __ATTR_RO(manf_id),
891         __ATTR_RO(card_id),
892         __ATTR_RO(prod_id1),
893         __ATTR_RO(prod_id2),
894         __ATTR_RO(prod_id3),
895         __ATTR_RO(prod_id4),
896         __ATTR_RO(modalias),
897         __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match),
898         __ATTR_NULL,
899 };
900
901
902 /*======================================================================
903
904     The card status event handler.
905     
906 ======================================================================*/
907
908 struct send_event_data {
909         struct pcmcia_socket *skt;
910         event_t event;
911         int priority;
912 };
913
914 static int send_event_callback(struct device *dev, void * _data)
915 {
916         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
917         struct send_event_data *data = _data;
918
919         /* we get called for all sockets, but may only pass the event
920          * for drivers _on the affected socket_ */
921         if (p_dev->socket != data->skt)
922                 return 0;
923
924         if (p_dev->client.state & (CLIENT_UNBOUND|CLIENT_STALE))
925                 return 0;
926
927         if (p_dev->client.EventMask & data->event)
928                 return EVENT(&p_dev->client, data->event, data->priority);
929
930         return 0;
931 }
932
933 static int send_event(struct pcmcia_socket *s, event_t event, int priority)
934 {
935         struct send_event_data private;
936
937         private.skt = s;
938         private.event = event;
939         private.priority = priority;
940
941         return bus_for_each_dev(&pcmcia_bus_type, NULL, &private, send_event_callback);
942 } /* send_event */
943
944
945 /* Normally, the event is passed to individual drivers after
946  * informing userspace. Only for CS_EVENT_CARD_REMOVAL this
947  * is inversed to maintain historic compatibility.
948  */
949
950 static int ds_event(struct pcmcia_socket *skt, event_t event, int priority)
951 {
952         struct pcmcia_socket *s = pcmcia_get_socket(skt);
953         int ret = 0;
954
955         ds_dbg(1, "ds_event(0x%06x, %d, 0x%p)\n",
956                event, priority, skt);
957     
958         switch (event) {
959
960         case CS_EVENT_CARD_REMOVAL:
961                 s->pcmcia_state.present = 0;
962                 send_event(skt, event, priority);
963                 unbind_request(skt);
964                 handle_event(skt, event);
965                 break;
966         
967         case CS_EVENT_CARD_INSERTION:
968                 s->pcmcia_state.present = 1;
969                 pcmcia_card_add(skt);
970                 handle_event(skt, event);
971                 break;
972
973         case CS_EVENT_EJECTION_REQUEST:
974                 ret = send_event(skt, event, priority);
975                 break;
976
977         default:
978                 handle_event(skt, event);
979                 send_event(skt, event, priority);
980                 break;
981     }
982
983     pcmcia_put_socket(s);
984
985     return 0;
986 } /* ds_event */
987
988
989
990 int pcmcia_register_client(client_handle_t *handle, client_reg_t *req)
991 {
992         client_t *client = NULL;
993         struct pcmcia_socket *s = NULL;
994         struct pcmcia_device *p_dev = NULL;
995
996         /* Look for unbound client with matching dev_info */
997         down_read(&pcmcia_socket_list_rwsem);
998         list_for_each_entry(s, &pcmcia_socket_list, socket_list) {
999                 unsigned long flags;
1000
1001                 if (s->state & SOCKET_CARDBUS)
1002                         continue;
1003
1004                 s = pcmcia_get_socket(s);
1005                 if (!s)
1006                         continue;
1007                 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
1008                 list_for_each_entry(p_dev, &s->devices_list, socket_device_list) {
1009                         struct pcmcia_driver *p_drv;
1010                         p_dev = pcmcia_get_dev(p_dev);
1011                         if (!p_dev)
1012                                 continue;
1013                         if (!(p_dev->client.state & CLIENT_UNBOUND) ||
1014                             (!p_dev->dev.driver)) {
1015                                 pcmcia_put_dev(p_dev);
1016                                 continue;
1017                         }
1018                         p_drv = to_pcmcia_drv(p_dev->dev.driver);
1019                         if (!strncmp(p_drv->drv.name, (char *)req->dev_info, DEV_NAME_LEN)) {
1020                                 client = &p_dev->client;
1021                                 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
1022                                 goto found;
1023                         }
1024                         pcmcia_put_dev(p_dev);
1025                 }
1026                 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
1027                 pcmcia_put_socket(s);
1028         }
1029  found:
1030         up_read(&pcmcia_socket_list_rwsem);
1031         if (!p_dev || !client)
1032                 return -ENODEV;
1033
1034         pcmcia_put_socket(s); /* safe, as we already hold a reference from bind_device */
1035
1036         *handle = client;
1037         client->state &= ~CLIENT_UNBOUND;
1038         client->Socket = s;
1039         client->EventMask = req->EventMask;
1040         client->event_handler = req->event_handler;
1041         client->event_callback_args = req->event_callback_args;
1042         client->event_callback_args.client_handle = client;
1043
1044         if (s->state & SOCKET_CARDBUS)
1045                 client->state |= CLIENT_CARDBUS;
1046
1047         if ((!(s->state & SOCKET_CARDBUS)) && (s->functions == 0) &&
1048             (client->Function != BIND_FN_ALL)) {
1049                 cistpl_longlink_mfc_t mfc;
1050                 if (pccard_read_tuple(s, client->Function, CISTPL_LONGLINK_MFC, &mfc)
1051                     == CS_SUCCESS)
1052                         s->functions = mfc.nfn;
1053                 else
1054                         s->functions = 1;
1055                 s->config = kmalloc(sizeof(config_t) * s->functions,
1056                                     GFP_KERNEL);
1057                 if (!s->config)
1058                         goto out_no_resource;
1059                 memset(s->config, 0, sizeof(config_t) * s->functions);
1060         }
1061
1062         ds_dbg(1, "register_client(): client 0x%p, dev %s\n",
1063                client, p_dev->dev.bus_id);
1064         if (client->EventMask & CS_EVENT_REGISTRATION_COMPLETE)
1065                 EVENT(client, CS_EVENT_REGISTRATION_COMPLETE, CS_EVENT_PRI_LOW);
1066
1067         if ((s->state & (SOCKET_PRESENT|SOCKET_CARDBUS)) == SOCKET_PRESENT) {
1068                 if (client->EventMask & CS_EVENT_CARD_INSERTION)
1069                         EVENT(client, CS_EVENT_CARD_INSERTION, CS_EVENT_PRI_LOW);
1070         }
1071
1072         return CS_SUCCESS;
1073
1074  out_no_resource:
1075         pcmcia_put_dev(p_dev);
1076         return CS_OUT_OF_RESOURCE;
1077 } /* register_client */
1078 EXPORT_SYMBOL(pcmcia_register_client);
1079
1080
1081 /* unbind _all_ devices attached to a given pcmcia_bus_socket. The
1082  * drivers have been called with EVENT_CARD_REMOVAL before.
1083  */
1084 static int unbind_request(struct pcmcia_socket *s)
1085 {
1086         struct pcmcia_device    *p_dev;
1087         unsigned long           flags;
1088
1089         ds_dbg(2, "unbind_request(%d)\n", s->sock);
1090
1091         s->device_count = 0;
1092
1093         for (;;) {
1094                 /* unregister all pcmcia_devices registered with this socket*/
1095                 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
1096                 if (list_empty(&s->devices_list)) {
1097                         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
1098                         return 0;
1099                 }
1100                 p_dev = list_entry((&s->devices_list)->next, struct pcmcia_device, socket_device_list);
1101                 list_del(&p_dev->socket_device_list);
1102                 p_dev->client.state |= CLIENT_STALE;
1103                 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
1104
1105                 device_unregister(&p_dev->dev);
1106         }
1107
1108         return 0;
1109 } /* unbind_request */
1110
1111 int pcmcia_deregister_client(client_handle_t handle)
1112 {
1113         struct pcmcia_socket *s;
1114         int i;
1115         struct pcmcia_device *p_dev = handle_to_pdev(handle);
1116
1117         if (CHECK_HANDLE(handle))
1118                 return CS_BAD_HANDLE;
1119
1120         s = SOCKET(handle);
1121         ds_dbg(1, "deregister_client(%p)\n", handle);
1122
1123         if (handle->state & (CLIENT_IRQ_REQ|CLIENT_IO_REQ|CLIENT_CONFIG_LOCKED))
1124                 goto warn_out;
1125         for (i = 0; i < MAX_WIN; i++)
1126                 if (handle->state & CLIENT_WIN_REQ(i))
1127                         goto warn_out;
1128
1129         if (handle->state & CLIENT_STALE) {
1130                 handle->client_magic = 0;
1131                 handle->state &= ~CLIENT_STALE;
1132                 pcmcia_put_dev(p_dev);
1133         } else {
1134                 handle->state = CLIENT_UNBOUND;
1135                 handle->event_handler = NULL;
1136         }
1137
1138         return CS_SUCCESS;
1139  warn_out:
1140         printk(KERN_WARNING "ds: deregister_client was called too early.\n");
1141         return CS_IN_USE;
1142 } /* deregister_client */
1143 EXPORT_SYMBOL(pcmcia_deregister_client);
1144
1145 static struct pcmcia_callback pcmcia_bus_callback = {
1146         .owner = THIS_MODULE,
1147         .event = ds_event,
1148         .requery = pcmcia_bus_rescan,
1149 };
1150
1151 static int __devinit pcmcia_bus_add_socket(struct class_device *class_dev)
1152 {
1153         struct pcmcia_socket *socket = class_get_devdata(class_dev);
1154         int ret;
1155
1156         socket = pcmcia_get_socket(socket);
1157         if (!socket) {
1158                 printk(KERN_ERR "PCMCIA obtaining reference to socket %p failed\n", socket);
1159                 return -ENODEV;
1160         }
1161
1162         /*
1163          * Ugly. But we want to wait for the socket threads to have started up.
1164          * We really should let the drivers themselves drive some of this..
1165          */
1166         msleep(250);
1167
1168 #ifdef CONFIG_PCMCIA_IOCTL
1169         init_waitqueue_head(&socket->queue);
1170 #endif
1171         INIT_LIST_HEAD(&socket->devices_list);
1172         INIT_WORK(&socket->device_add, pcmcia_delayed_add_pseudo_device, socket);
1173         memset(&socket->pcmcia_state, 0, sizeof(u8));
1174         socket->device_count = 0;
1175
1176         ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback);
1177         if (ret) {
1178                 printk(KERN_ERR "PCMCIA registration PCCard core failed for socket %p\n", socket);
1179                 pcmcia_put_socket(socket);
1180                 return (ret);
1181         }
1182
1183         return 0;
1184 }
1185
1186 static void pcmcia_bus_remove_socket(struct class_device *class_dev)
1187 {
1188         struct pcmcia_socket *socket = class_get_devdata(class_dev);
1189
1190         if (!socket)
1191                 return;
1192
1193         socket->pcmcia_state.dead = 1;
1194         pccard_register_pcmcia(socket, NULL);
1195
1196         pcmcia_put_socket(socket);
1197
1198         return;
1199 }
1200
1201
1202 /* the pcmcia_bus_interface is used to handle pcmcia socket devices */
1203 static struct class_interface pcmcia_bus_interface = {
1204         .class = &pcmcia_socket_class,
1205         .add = &pcmcia_bus_add_socket,
1206         .remove = &pcmcia_bus_remove_socket,
1207 };
1208
1209
1210 struct bus_type pcmcia_bus_type = {
1211         .name = "pcmcia",
1212         .hotplug = pcmcia_bus_hotplug,
1213         .match = pcmcia_bus_match,
1214         .dev_attrs = pcmcia_dev_attrs,
1215 };
1216
1217
1218 static int __init init_pcmcia_bus(void)
1219 {
1220         spin_lock_init(&pcmcia_dev_list_lock);
1221
1222         bus_register(&pcmcia_bus_type);
1223         class_interface_register(&pcmcia_bus_interface);
1224
1225         pcmcia_setup_ioctl();
1226
1227         return 0;
1228 }
1229 fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that 
1230                                * pcmcia_socket_class is already registered */
1231
1232
1233 static void __exit exit_pcmcia_bus(void)
1234 {
1235         pcmcia_cleanup_ioctl();
1236
1237         class_interface_unregister(&pcmcia_bus_interface);
1238
1239         bus_unregister(&pcmcia_bus_type);
1240 }
1241 module_exit(exit_pcmcia_bus);
1242
1243
1244 MODULE_ALIAS("ds");