[ACPI] merge acpi-2.6.12 branch into latest Linux 2.6.13-rc...
[linux-2.6] / drivers / pcmcia / ds.c
1 /*
2  * ds.c -- 16-bit PCMCIA core support
3  *
4  * This program is free software; you can redistribute it and/or modify
5  * it under the terms of the GNU General Public License version 2 as
6  * published by the Free Software Foundation.
7  *
8  * The initial developer of the original code is David A. Hinds
9  * <dahinds@users.sourceforge.net>.  Portions created by David A. Hinds
10  * are Copyright (C) 1999 David A. Hinds.  All Rights Reserved.
11  *
12  * (C) 1999             David A. Hinds
13  * (C) 2003 - 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(struct pcmcia_device *p_dev, error_info_t *err)
162 {
163         int i;
164         char *serv;
165
166         if (!p_dev)
167                 printk(KERN_NOTICE);
168         else
169                 printk(KERN_NOTICE "%s: ", p_dev->dev.bus_id);
170
171         for (i = 0; i < ARRAY_SIZE(service_table); i++)
172                 if (service_table[i].key == err->func)
173                         break;
174         if (i < ARRAY_SIZE(service_table))
175                 serv = service_table[i].msg;
176         else
177                 serv = "Unknown service number";
178
179         for (i = 0; i < ARRAY_SIZE(error_table); i++)
180                 if (error_table[i].key == err->retcode)
181                         break;
182         if (i < ARRAY_SIZE(error_table))
183                 printk("%s: %s\n", serv, error_table[i].msg);
184         else
185                 printk("%s: Unknown error code %#x\n", serv, err->retcode);
186
187         return CS_SUCCESS;
188 } /* report_error */
189
190 /* end of code which was in cs.c before */
191
192 /*======================================================================*/
193
194 void cs_error(struct pcmcia_device *p_dev, int func, int ret)
195 {
196         error_info_t err = { func, ret };
197         pcmcia_report_error(p_dev, &err);
198 }
199 EXPORT_SYMBOL(cs_error);
200
201
202 static void pcmcia_check_driver(struct pcmcia_driver *p_drv)
203 {
204         struct pcmcia_device_id *did = p_drv->id_table;
205         unsigned int i;
206         u32 hash;
207
208         if (!p_drv->attach || !p_drv->event || !p_drv->detach)
209                 printk(KERN_DEBUG "pcmcia: %s does misses a callback function",
210                        p_drv->drv.name);
211
212         while (did && did->match_flags) {
213                 for (i=0; i<4; i++) {
214                         if (!did->prod_id[i])
215                                 continue;
216
217                         hash = crc32(0, did->prod_id[i], strlen(did->prod_id[i]));
218                         if (hash == did->prod_id_hash[i])
219                                 continue;
220
221                         printk(KERN_DEBUG "pcmcia: %s: invalid hash for "
222                                "product string \"%s\": is 0x%x, should "
223                                "be 0x%x\n", p_drv->drv.name, did->prod_id[i],
224                                did->prod_id_hash[i], hash);
225                         printk(KERN_DEBUG "pcmcia: see "
226                                 "Documentation/pcmcia/devicetable.txt for "
227                                 "details\n");
228                 }
229                 did++;
230         }
231
232         return;
233 }
234
235
236 #ifdef CONFIG_PCMCIA_LOAD_CIS
237
238 /**
239  * pcmcia_load_firmware - load CIS from userspace if device-provided is broken
240  * @dev - the pcmcia device which needs a CIS override
241  * @filename - requested filename in /lib/firmware/cis/
242  *
243  * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if
244  * the one provided by the card is broken. The firmware files reside in
245  * /lib/firmware/cis/ in userspace.
246  */
247 static int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
248 {
249         struct pcmcia_socket *s = dev->socket;
250         const struct firmware *fw;
251         char path[20];
252         int ret=-ENOMEM;
253         cisdump_t *cis;
254
255         if (!filename)
256                 return -EINVAL;
257
258         ds_dbg(1, "trying to load firmware %s\n", filename);
259
260         if (strlen(filename) > 14)
261                 return -EINVAL;
262
263         snprintf(path, 20, "%s", filename);
264
265         if (request_firmware(&fw, path, &dev->dev) == 0) {
266                 if (fw->size >= CISTPL_MAX_CIS_SIZE)
267                         goto release;
268
269                 cis = kmalloc(sizeof(cisdump_t), GFP_KERNEL);
270                 if (!cis)
271                         goto release;
272
273                 memset(cis, 0, sizeof(cisdump_t));
274
275                 cis->Length = fw->size + 1;
276                 memcpy(cis->Data, fw->data, fw->size);
277
278                 if (!pcmcia_replace_cis(s, cis))
279                         ret = 0;
280         }
281  release:
282         release_firmware(fw);
283
284         return (ret);
285 }
286
287 #else /* !CONFIG_PCMCIA_LOAD_CIS */
288
289 static inline int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
290 {
291         return -ENODEV;
292 }
293
294 #endif
295
296
297 /*======================================================================*/
298
299
300 /**
301  * pcmcia_register_driver - register a PCMCIA driver with the bus core
302  *
303  * Registers a PCMCIA driver with the PCMCIA bus core.
304  */
305 static int pcmcia_device_probe(struct device *dev);
306 static int pcmcia_device_remove(struct device * dev);
307
308 int pcmcia_register_driver(struct pcmcia_driver *driver)
309 {
310         if (!driver)
311                 return -EINVAL;
312
313         pcmcia_check_driver(driver);
314
315         /* initialize common fields */
316         driver->drv.bus = &pcmcia_bus_type;
317         driver->drv.owner = driver->owner;
318         driver->drv.probe = pcmcia_device_probe;
319         driver->drv.remove = pcmcia_device_remove;
320
321         return driver_register(&driver->drv);
322 }
323 EXPORT_SYMBOL(pcmcia_register_driver);
324
325 /**
326  * pcmcia_unregister_driver - unregister a PCMCIA driver with the bus core
327  */
328 void pcmcia_unregister_driver(struct pcmcia_driver *driver)
329 {
330         driver_unregister(&driver->drv);
331 }
332 EXPORT_SYMBOL(pcmcia_unregister_driver);
333
334
335 /* pcmcia_device handling */
336
337 struct pcmcia_device * pcmcia_get_dev(struct pcmcia_device *p_dev)
338 {
339         struct device *tmp_dev;
340         tmp_dev = get_device(&p_dev->dev);
341         if (!tmp_dev)
342                 return NULL;
343         return to_pcmcia_dev(tmp_dev);
344 }
345
346 void pcmcia_put_dev(struct pcmcia_device *p_dev)
347 {
348         if (p_dev)
349                 put_device(&p_dev->dev);
350 }
351
352 static void pcmcia_release_dev(struct device *dev)
353 {
354         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
355         ds_dbg(1, "releasing dev %p\n", p_dev);
356         pcmcia_put_socket(p_dev->socket);
357         kfree(p_dev);
358 }
359
360
361 static int pcmcia_device_probe(struct device * dev)
362 {
363         struct pcmcia_device *p_dev;
364         struct pcmcia_driver *p_drv;
365         int ret = 0;
366
367         dev = get_device(dev);
368         if (!dev)
369                 return -ENODEV;
370
371         p_dev = to_pcmcia_dev(dev);
372         p_drv = to_pcmcia_drv(dev->driver);
373
374         if (!try_module_get(p_drv->owner)) {
375                 ret = -EINVAL;
376                 goto put_dev;
377         }
378
379         if (p_drv->attach) {
380                 p_dev->instance = p_drv->attach();
381                 if ((!p_dev->instance) || (p_dev->state & CLIENT_UNBOUND)) {
382                         printk(KERN_NOTICE "ds: unable to create instance "
383                                "of '%s'!\n", p_drv->drv.name);
384                         ret = -EINVAL;
385                 }
386         }
387
388         if (ret)
389                 module_put(p_drv->owner);
390  put_dev:
391         if ((ret) || !(p_drv->attach))
392                 put_device(dev);
393         return (ret);
394 }
395
396
397 static int pcmcia_device_remove(struct device * dev)
398 {
399         struct pcmcia_device *p_dev;
400         struct pcmcia_driver *p_drv;
401
402         /* detach the "instance" */
403         p_dev = to_pcmcia_dev(dev);
404         p_drv = to_pcmcia_drv(dev->driver);
405
406         if (p_drv) {
407                 if ((p_drv->detach) && (p_dev->instance)) {
408                         p_drv->detach(p_dev->instance);
409                         /* from pcmcia_probe_device */
410                         put_device(&p_dev->dev);
411                 }
412                 module_put(p_drv->owner);
413         }
414
415         return 0;
416 }
417
418
419
420 /*
421  * pcmcia_device_query -- determine information about a pcmcia device
422  */
423 static int pcmcia_device_query(struct pcmcia_device *p_dev)
424 {
425         cistpl_manfid_t manf_id;
426         cistpl_funcid_t func_id;
427         cistpl_vers_1_t vers1;
428         unsigned int i;
429
430         if (!pccard_read_tuple(p_dev->socket, p_dev->func,
431                                CISTPL_MANFID, &manf_id)) {
432                 p_dev->manf_id = manf_id.manf;
433                 p_dev->card_id = manf_id.card;
434                 p_dev->has_manf_id = 1;
435                 p_dev->has_card_id = 1;
436         }
437
438         if (!pccard_read_tuple(p_dev->socket, p_dev->func,
439                                CISTPL_FUNCID, &func_id)) {
440                 p_dev->func_id = func_id.func;
441                 p_dev->has_func_id = 1;
442         } else {
443                 /* rule of thumb: cards with no FUNCID, but with
444                  * common memory device geometry information, are
445                  * probably memory cards (from pcmcia-cs) */
446                 cistpl_device_geo_t devgeo;
447                 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
448                                       CISTPL_DEVICE_GEO, &devgeo)) {
449                         ds_dbg(0, "mem device geometry probably means "
450                                "FUNCID_MEMORY\n");
451                         p_dev->func_id = CISTPL_FUNCID_MEMORY;
452                         p_dev->has_func_id = 1;
453                 }
454         }
455
456         if (!pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_VERS_1,
457                                &vers1)) {
458                 for (i=0; i < vers1.ns; i++) {
459                         char *tmp;
460                         unsigned int length;
461
462                         tmp = vers1.str + vers1.ofs[i];
463
464                         length = strlen(tmp) + 1;
465                         if ((length < 3) || (length > 255))
466                                 continue;
467
468                         p_dev->prod_id[i] = kmalloc(sizeof(char) * length,
469                                                     GFP_KERNEL);
470                         if (!p_dev->prod_id[i])
471                                 continue;
472
473                         p_dev->prod_id[i] = strncpy(p_dev->prod_id[i],
474                                                     tmp, length);
475                 }
476         }
477
478         return 0;
479 }
480
481
482 /* device_add_lock is needed to avoid double registration by cardmgr and kernel.
483  * Serializes pcmcia_device_add; will most likely be removed in future.
484  *
485  * While it has the caveat that adding new PCMCIA devices inside(!) device_register()
486  * won't work, this doesn't matter much at the moment: the driver core doesn't
487  * support it either.
488  */
489 static DECLARE_MUTEX(device_add_lock);
490
491 struct pcmcia_device * pcmcia_device_add(struct pcmcia_socket *s, unsigned int function)
492 {
493         struct pcmcia_device *p_dev;
494         unsigned long flags;
495
496         s = pcmcia_get_socket(s);
497         if (!s)
498                 return NULL;
499
500         down(&device_add_lock);
501
502         /* max of 2 devices per card */
503         if (s->device_count == 2)
504                 goto err_put;
505
506         p_dev = kmalloc(sizeof(struct pcmcia_device), GFP_KERNEL);
507         if (!p_dev)
508                 goto err_put;
509         memset(p_dev, 0, sizeof(struct pcmcia_device));
510
511         p_dev->socket = s;
512         p_dev->device_no = (s->device_count++);
513         p_dev->func   = function;
514
515         p_dev->dev.bus = &pcmcia_bus_type;
516         p_dev->dev.parent = s->dev.dev;
517         p_dev->dev.release = pcmcia_release_dev;
518         sprintf (p_dev->dev.bus_id, "%d.%d", p_dev->socket->sock, p_dev->device_no);
519
520         /* compat */
521         p_dev->state = CLIENT_UNBOUND;
522
523         /* Add to the list in pcmcia_bus_socket */
524         spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
525         list_add_tail(&p_dev->socket_device_list, &s->devices_list);
526         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
527
528         pcmcia_device_query(p_dev);
529
530         if (device_register(&p_dev->dev)) {
531                 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
532                 list_del(&p_dev->socket_device_list);
533                 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
534
535                 goto err_free;
536        }
537
538         up(&device_add_lock);
539
540         return p_dev;
541
542  err_free:
543         kfree(p_dev);
544         s->device_count--;
545  err_put:
546         up(&device_add_lock);
547         pcmcia_put_socket(s);
548
549         return NULL;
550 }
551
552
553 static int pcmcia_card_add(struct pcmcia_socket *s)
554 {
555         cisinfo_t cisinfo;
556         cistpl_longlink_mfc_t mfc;
557         unsigned int no_funcs, i;
558         int ret = 0;
559
560         if (!(s->resource_setup_done))
561                 return -EAGAIN; /* try again, but later... */
562
563         pcmcia_validate_mem(s);
564         ret = pccard_validate_cis(s, BIND_FN_ALL, &cisinfo);
565         if (ret || !cisinfo.Chains) {
566                 ds_dbg(0, "invalid CIS or invalid resources\n");
567                 return -ENODEV;
568         }
569
570         if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
571                 no_funcs = mfc.nfn;
572         else
573                 no_funcs = 1;
574
575         for (i=0; i < no_funcs; i++)
576                 pcmcia_device_add(s, i);
577
578         return (ret);
579 }
580
581
582 static void pcmcia_delayed_add_pseudo_device(void *data)
583 {
584         struct pcmcia_socket *s = data;
585         pcmcia_device_add(s, 0);
586         s->pcmcia_state.device_add_pending = 0;
587 }
588
589 static inline void pcmcia_add_pseudo_device(struct pcmcia_socket *s)
590 {
591         if (!s->pcmcia_state.device_add_pending) {
592                 schedule_work(&s->device_add);
593                 s->pcmcia_state.device_add_pending = 1;
594         }
595         return;
596 }
597
598 static int pcmcia_requery(struct device *dev, void * _data)
599 {
600         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
601         if (!p_dev->dev.driver)
602                 pcmcia_device_query(p_dev);
603
604         return 0;
605 }
606
607 static void pcmcia_bus_rescan(struct pcmcia_socket *skt)
608 {
609         int no_devices=0;
610         unsigned long flags;
611
612         /* must be called with skt_sem held */
613         spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
614         if (list_empty(&skt->devices_list))
615                 no_devices=1;
616         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
617
618         /* if no devices were added for this socket yet because of
619          * missing resource information or other trouble, we need to
620          * do this now. */
621         if (no_devices) {
622                 int ret = pcmcia_card_add(skt);
623                 if (ret)
624                         return;
625         }
626
627         /* some device information might have changed because of a CIS
628          * update or because we can finally read it correctly... so
629          * determine it again, overwriting old values if necessary. */
630         bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery);
631
632         /* we re-scan all devices, not just the ones connected to this
633          * socket. This does not matter, though. */
634         bus_rescan_devices(&pcmcia_bus_type);
635 }
636
637 static inline int pcmcia_devmatch(struct pcmcia_device *dev,
638                                   struct pcmcia_device_id *did)
639 {
640         if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
641                 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
642                         return 0;
643         }
644
645         if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
646                 if ((!dev->has_card_id) || (dev->card_id != did->card_id))
647                         return 0;
648         }
649
650         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
651                 if (dev->func != did->function)
652                         return 0;
653         }
654
655         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
656                 if (!dev->prod_id[0])
657                         return 0;
658                 if (strcmp(did->prod_id[0], dev->prod_id[0]))
659                         return 0;
660         }
661
662         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
663                 if (!dev->prod_id[1])
664                         return 0;
665                 if (strcmp(did->prod_id[1], dev->prod_id[1]))
666                         return 0;
667         }
668
669         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
670                 if (!dev->prod_id[2])
671                         return 0;
672                 if (strcmp(did->prod_id[2], dev->prod_id[2]))
673                         return 0;
674         }
675
676         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
677                 if (!dev->prod_id[3])
678                         return 0;
679                 if (strcmp(did->prod_id[3], dev->prod_id[3]))
680                         return 0;
681         }
682
683         if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
684                 /* handle pseudo multifunction devices:
685                  * there are at most two pseudo multifunction devices.
686                  * if we're matching against the first, schedule a
687                  * call which will then check whether there are two
688                  * pseudo devices, and if not, add the second one.
689                  */
690                 if (dev->device_no == 0)
691                         pcmcia_add_pseudo_device(dev->socket);
692
693                 if (dev->device_no != did->device_no)
694                         return 0;
695         }
696
697         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
698                 if ((!dev->has_func_id) || (dev->func_id != did->func_id))
699                         return 0;
700
701                 /* if this is a pseudo-multi-function device,
702                  * we need explicit matches */
703                 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO)
704                         return 0;
705                 if (dev->device_no)
706                         return 0;
707
708                 /* also, FUNC_ID matching needs to be activated by userspace
709                  * after it has re-checked that there is no possible module
710                  * with a prod_id/manf_id/card_id match.
711                  */
712                 if (!dev->allow_func_id_match)
713                         return 0;
714         }
715
716         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
717                 if (!dev->socket->fake_cis)
718                         pcmcia_load_firmware(dev, did->cisfile);
719
720                 if (!dev->socket->fake_cis)
721                         return 0;
722         }
723
724         if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
725                 int i;
726                 for (i=0; i<4; i++)
727                         if (dev->prod_id[i])
728                                 return 0;
729                 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
730                         return 0;
731         }
732
733         dev->dev.driver_data = (void *) did;
734
735         return 1;
736 }
737
738
739 static int pcmcia_bus_match(struct device * dev, struct device_driver * drv) {
740         struct pcmcia_device * p_dev = to_pcmcia_dev(dev);
741         struct pcmcia_driver * p_drv = to_pcmcia_drv(drv);
742         struct pcmcia_device_id *did = p_drv->id_table;
743
744         /* matching by cardmgr */
745         if (p_dev->cardmgr == p_drv)
746                 return 1;
747
748         while (did && did->match_flags) {
749                 if (pcmcia_devmatch(p_dev, did))
750                         return 1;
751                 did++;
752         }
753
754         return 0;
755 }
756
757 #ifdef CONFIG_HOTPLUG
758
759 static int pcmcia_bus_hotplug(struct device *dev, char **envp, int num_envp,
760                               char *buffer, int buffer_size)
761 {
762         struct pcmcia_device *p_dev;
763         int i, length = 0;
764         u32 hash[4] = { 0, 0, 0, 0};
765
766         if (!dev)
767                 return -ENODEV;
768
769         p_dev = to_pcmcia_dev(dev);
770
771         /* calculate hashes */
772         for (i=0; i<4; i++) {
773                 if (!p_dev->prod_id[i])
774                         continue;
775                 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
776         }
777
778         i = 0;
779
780         if (add_hotplug_env_var(envp, num_envp, &i,
781                                 buffer, buffer_size, &length,
782                                 "SOCKET_NO=%u",
783                                 p_dev->socket->sock))
784                 return -ENOMEM;
785
786         if (add_hotplug_env_var(envp, num_envp, &i,
787                                 buffer, buffer_size, &length,
788                                 "DEVICE_NO=%02X",
789                                 p_dev->device_no))
790                 return -ENOMEM;
791
792         if (add_hotplug_env_var(envp, num_envp, &i,
793                                 buffer, buffer_size, &length,
794                                 "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
795                                 "pa%08Xpb%08Xpc%08Xpd%08X",
796                                 p_dev->has_manf_id ? p_dev->manf_id : 0,
797                                 p_dev->has_card_id ? p_dev->card_id : 0,
798                                 p_dev->has_func_id ? p_dev->func_id : 0,
799                                 p_dev->func,
800                                 p_dev->device_no,
801                                 hash[0],
802                                 hash[1],
803                                 hash[2],
804                                 hash[3]))
805                 return -ENOMEM;
806
807         envp[i] = NULL;
808
809         return 0;
810 }
811
812 #else
813
814 static int pcmcia_bus_hotplug(struct device *dev, char **envp, int num_envp,
815                               char *buffer, int buffer_size)
816 {
817         return -ENODEV;
818 }
819
820 #endif
821
822 /************************ per-device sysfs output ***************************/
823
824 #define pcmcia_device_attr(field, test, format)                         \
825 static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf)              \
826 {                                                                       \
827         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);               \
828         return p_dev->test ? sprintf (buf, format, p_dev->field) : -ENODEV; \
829 }
830
831 #define pcmcia_device_stringattr(name, field)                                   \
832 static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf)               \
833 {                                                                       \
834         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);               \
835         return p_dev->field ? sprintf (buf, "%s\n", p_dev->field) : -ENODEV; \
836 }
837
838 pcmcia_device_attr(func, socket, "0x%02x\n");
839 pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
840 pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
841 pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
842 pcmcia_device_stringattr(prod_id1, prod_id[0]);
843 pcmcia_device_stringattr(prod_id2, prod_id[1]);
844 pcmcia_device_stringattr(prod_id3, prod_id[2]);
845 pcmcia_device_stringattr(prod_id4, prod_id[3]);
846
847 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
848 {
849         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
850         int i;
851         u32 hash[4] = { 0, 0, 0, 0};
852
853         /* calculate hashes */
854         for (i=0; i<4; i++) {
855                 if (!p_dev->prod_id[i])
856                         continue;
857                 hash[i] = crc32(0,p_dev->prod_id[i],strlen(p_dev->prod_id[i]));
858         }
859         return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
860                                 "pa%08Xpb%08Xpc%08Xpd%08X\n",
861                                 p_dev->has_manf_id ? p_dev->manf_id : 0,
862                                 p_dev->has_card_id ? p_dev->card_id : 0,
863                                 p_dev->has_func_id ? p_dev->func_id : 0,
864                                 p_dev->func, p_dev->device_no,
865                                 hash[0], hash[1], hash[2], hash[3]);
866 }
867
868 static ssize_t pcmcia_store_allow_func_id_match(struct device *dev,
869                 struct device_attribute *attr, const char *buf, size_t count)
870 {
871         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
872         if (!count)
873                 return -EINVAL;
874
875         down(&p_dev->socket->skt_sem);
876         p_dev->allow_func_id_match = 1;
877         up(&p_dev->socket->skt_sem);
878
879         bus_rescan_devices(&pcmcia_bus_type);
880
881         return count;
882 }
883
884 static struct device_attribute pcmcia_dev_attrs[] = {
885         __ATTR(function, 0444, func_show, NULL),
886         __ATTR_RO(func_id),
887         __ATTR_RO(manf_id),
888         __ATTR_RO(card_id),
889         __ATTR_RO(prod_id1),
890         __ATTR_RO(prod_id2),
891         __ATTR_RO(prod_id3),
892         __ATTR_RO(prod_id4),
893         __ATTR_RO(modalias),
894         __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match),
895         __ATTR_NULL,
896 };
897
898
899 /*======================================================================
900
901     The card status event handler.
902     
903 ======================================================================*/
904
905 struct send_event_data {
906         struct pcmcia_socket *skt;
907         event_t event;
908         int priority;
909 };
910
911 static int send_event_callback(struct device *dev, void * _data)
912 {
913         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
914         struct pcmcia_driver *p_drv;
915         struct send_event_data *data = _data;
916
917         /* we get called for all sockets, but may only pass the event
918          * for drivers _on the affected socket_ */
919         if (p_dev->socket != data->skt)
920                 return 0;
921
922         p_drv = to_pcmcia_drv(p_dev->dev.driver);
923         if (!p_drv)
924                 return 0;
925
926         if (p_dev->state & (CLIENT_UNBOUND|CLIENT_STALE))
927                 return 0;
928
929         if (p_drv->event)
930                 return p_drv->event(data->event, data->priority,
931                                     &p_dev->event_callback_args);
932
933         return 0;
934 }
935
936 static int send_event(struct pcmcia_socket *s, event_t event, int priority)
937 {
938         struct send_event_data private;
939
940         private.skt = s;
941         private.event = event;
942         private.priority = priority;
943
944         return bus_for_each_dev(&pcmcia_bus_type, NULL, &private, send_event_callback);
945 } /* send_event */
946
947
948 /* Normally, the event is passed to individual drivers after
949  * informing userspace. Only for CS_EVENT_CARD_REMOVAL this
950  * is inversed to maintain historic compatibility.
951  */
952
953 static int ds_event(struct pcmcia_socket *skt, event_t event, int priority)
954 {
955         struct pcmcia_socket *s = pcmcia_get_socket(skt);
956         int ret = 0;
957
958         ds_dbg(1, "ds_event(0x%06x, %d, 0x%p)\n",
959                event, priority, skt);
960     
961         switch (event) {
962
963         case CS_EVENT_CARD_REMOVAL:
964                 s->pcmcia_state.present = 0;
965                 send_event(skt, event, priority);
966                 unbind_request(skt);
967                 handle_event(skt, event);
968                 break;
969         
970         case CS_EVENT_CARD_INSERTION:
971                 s->pcmcia_state.present = 1;
972                 pcmcia_card_add(skt);
973                 handle_event(skt, event);
974                 break;
975
976         case CS_EVENT_EJECTION_REQUEST:
977                 ret = send_event(skt, event, priority);
978                 break;
979
980         default:
981                 handle_event(skt, event);
982                 send_event(skt, event, priority);
983                 break;
984     }
985
986     pcmcia_put_socket(s);
987
988     return 0;
989 } /* ds_event */
990
991
992
993 int pcmcia_register_client(struct pcmcia_device **handle, client_reg_t *req)
994 {
995         struct pcmcia_socket *s = NULL;
996         struct pcmcia_device *p_dev = NULL;
997         struct pcmcia_driver *p_drv = NULL;
998
999         /* Look for unbound client with matching dev_info */
1000         down_read(&pcmcia_socket_list_rwsem);
1001         list_for_each_entry(s, &pcmcia_socket_list, socket_list) {
1002                 unsigned long flags;
1003
1004                 if (s->state & SOCKET_CARDBUS)
1005                         continue;
1006
1007                 s = pcmcia_get_socket(s);
1008                 if (!s)
1009                         continue;
1010                 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
1011                 list_for_each_entry(p_dev, &s->devices_list, socket_device_list) {
1012                         p_dev = pcmcia_get_dev(p_dev);
1013                         if (!p_dev)
1014                                 continue;
1015                         if (!(p_dev->state & CLIENT_UNBOUND) ||
1016                             (!p_dev->dev.driver)) {
1017                                 pcmcia_put_dev(p_dev);
1018                                 continue;
1019                         }
1020                         p_drv = to_pcmcia_drv(p_dev->dev.driver);
1021                         if (!strncmp(p_drv->drv.name, (char *)req->dev_info, DEV_NAME_LEN)) {
1022                                 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
1023                                 goto found;
1024                         }
1025                         pcmcia_put_dev(p_dev);
1026                 }
1027                 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
1028                 pcmcia_put_socket(s);
1029         }
1030  found:
1031         up_read(&pcmcia_socket_list_rwsem);
1032         if (!p_dev)
1033                 return -ENODEV;
1034
1035         pcmcia_put_socket(s); /* safe, as we already hold a reference from bind_device */
1036
1037         *handle = p_dev;
1038         p_dev->state &= ~CLIENT_UNBOUND;
1039         p_dev->event_callback_args = req->event_callback_args;
1040         p_dev->event_callback_args.client_handle = p_dev;
1041
1042
1043         if (!s->functions) {
1044                 cistpl_longlink_mfc_t mfc;
1045                 if (pccard_read_tuple(s, p_dev->func, CISTPL_LONGLINK_MFC, &mfc)
1046                     == CS_SUCCESS)
1047                         s->functions = mfc.nfn;
1048                 else
1049                         s->functions = 1;
1050                 s->config = kmalloc(sizeof(config_t) * s->functions,
1051                                     GFP_KERNEL);
1052                 if (!s->config)
1053                         goto out_no_resource;
1054                 memset(s->config, 0, sizeof(config_t) * s->functions);
1055         }
1056
1057         ds_dbg(1, "register_client(): client 0x%p, dev %s\n",
1058                p_dev, p_dev->dev.bus_id);
1059
1060         if ((s->state & (SOCKET_PRESENT|SOCKET_CARDBUS)) == SOCKET_PRESENT) {
1061                 if (p_drv->event)
1062                         p_drv->event(CS_EVENT_CARD_INSERTION, CS_EVENT_PRI_LOW,
1063                                      &p_dev->event_callback_args);
1064
1065         }
1066
1067         return CS_SUCCESS;
1068
1069  out_no_resource:
1070         pcmcia_put_dev(p_dev);
1071         return CS_OUT_OF_RESOURCE;
1072 } /* register_client */
1073 EXPORT_SYMBOL(pcmcia_register_client);
1074
1075
1076 /* unbind _all_ devices attached to a given pcmcia_bus_socket. The
1077  * drivers have been called with EVENT_CARD_REMOVAL before.
1078  */
1079 static int unbind_request(struct pcmcia_socket *s)
1080 {
1081         struct pcmcia_device    *p_dev;
1082         unsigned long           flags;
1083
1084         ds_dbg(2, "unbind_request(%d)\n", s->sock);
1085
1086         s->device_count = 0;
1087
1088         for (;;) {
1089                 /* unregister all pcmcia_devices registered with this socket*/
1090                 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
1091                 if (list_empty(&s->devices_list)) {
1092                         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
1093                         return 0;
1094                 }
1095                 p_dev = list_entry((&s->devices_list)->next, struct pcmcia_device, socket_device_list);
1096                 list_del(&p_dev->socket_device_list);
1097                 p_dev->state |= CLIENT_STALE;
1098                 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
1099
1100                 device_unregister(&p_dev->dev);
1101         }
1102
1103         return 0;
1104 } /* unbind_request */
1105
1106 int pcmcia_deregister_client(struct pcmcia_device *p_dev)
1107 {
1108         struct pcmcia_socket *s;
1109         int i;
1110
1111         s = p_dev->socket;
1112         ds_dbg(1, "deregister_client(%p)\n", p_dev);
1113
1114         if (p_dev->state & (CLIENT_IRQ_REQ|CLIENT_IO_REQ|CLIENT_CONFIG_LOCKED))
1115                 goto warn_out;
1116         for (i = 0; i < MAX_WIN; i++)
1117                 if (p_dev->state & CLIENT_WIN_REQ(i))
1118                         goto warn_out;
1119
1120         if (p_dev->state & CLIENT_STALE) {
1121                 p_dev->state &= ~CLIENT_STALE;
1122                 pcmcia_put_dev(p_dev);
1123         } else {
1124                 p_dev->state = CLIENT_UNBOUND;
1125         }
1126
1127         return CS_SUCCESS;
1128  warn_out:
1129         printk(KERN_WARNING "ds: deregister_client was called too early.\n");
1130         return CS_IN_USE;
1131 } /* deregister_client */
1132 EXPORT_SYMBOL(pcmcia_deregister_client);
1133
1134 static struct pcmcia_callback pcmcia_bus_callback = {
1135         .owner = THIS_MODULE,
1136         .event = ds_event,
1137         .requery = pcmcia_bus_rescan,
1138 };
1139
1140 static int __devinit pcmcia_bus_add_socket(struct class_device *class_dev)
1141 {
1142         struct pcmcia_socket *socket = class_get_devdata(class_dev);
1143         int ret;
1144
1145         socket = pcmcia_get_socket(socket);
1146         if (!socket) {
1147                 printk(KERN_ERR "PCMCIA obtaining reference to socket %p failed\n", socket);
1148                 return -ENODEV;
1149         }
1150
1151         /*
1152          * Ugly. But we want to wait for the socket threads to have started up.
1153          * We really should let the drivers themselves drive some of this..
1154          */
1155         msleep(250);
1156
1157 #ifdef CONFIG_PCMCIA_IOCTL
1158         init_waitqueue_head(&socket->queue);
1159 #endif
1160         INIT_LIST_HEAD(&socket->devices_list);
1161         INIT_WORK(&socket->device_add, pcmcia_delayed_add_pseudo_device, socket);
1162         memset(&socket->pcmcia_state, 0, sizeof(u8));
1163         socket->device_count = 0;
1164
1165         ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback);
1166         if (ret) {
1167                 printk(KERN_ERR "PCMCIA registration PCCard core failed for socket %p\n", socket);
1168                 pcmcia_put_socket(socket);
1169                 return (ret);
1170         }
1171
1172         return 0;
1173 }
1174
1175 static void pcmcia_bus_remove_socket(struct class_device *class_dev)
1176 {
1177         struct pcmcia_socket *socket = class_get_devdata(class_dev);
1178
1179         if (!socket)
1180                 return;
1181
1182         socket->pcmcia_state.dead = 1;
1183         pccard_register_pcmcia(socket, NULL);
1184
1185         pcmcia_put_socket(socket);
1186
1187         return;
1188 }
1189
1190
1191 /* the pcmcia_bus_interface is used to handle pcmcia socket devices */
1192 static struct class_interface pcmcia_bus_interface = {
1193         .class = &pcmcia_socket_class,
1194         .add = &pcmcia_bus_add_socket,
1195         .remove = &pcmcia_bus_remove_socket,
1196 };
1197
1198
1199 struct bus_type pcmcia_bus_type = {
1200         .name = "pcmcia",
1201         .hotplug = pcmcia_bus_hotplug,
1202         .match = pcmcia_bus_match,
1203         .dev_attrs = pcmcia_dev_attrs,
1204 };
1205
1206
1207 static int __init init_pcmcia_bus(void)
1208 {
1209         spin_lock_init(&pcmcia_dev_list_lock);
1210
1211         bus_register(&pcmcia_bus_type);
1212         class_interface_register(&pcmcia_bus_interface);
1213
1214         pcmcia_setup_ioctl();
1215
1216         return 0;
1217 }
1218 fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that 
1219                                * pcmcia_socket_class is already registered */
1220
1221
1222 static void __exit exit_pcmcia_bus(void)
1223 {
1224         pcmcia_cleanup_ioctl();
1225
1226         class_interface_unregister(&pcmcia_bus_interface);
1227
1228         bus_unregister(&pcmcia_bus_type);
1229 }
1230 module_exit(exit_pcmcia_bus);
1231
1232
1233 MODULE_ALIAS("ds");