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[PATCH] pcmcia: unify attach, EVENT_CARD_INSERTION handlers into one probe callback
[deliverable/linux.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 /*====================================================================*/
61
62 /* code which was in cs.c before */
63
64 /* String tables for error messages */
65
66 typedef struct lookup_t {
67 int key;
68 char *msg;
69 } lookup_t;
70
71 static const lookup_t error_table[] = {
72 { CS_SUCCESS, "Operation succeeded" },
73 { CS_BAD_ADAPTER, "Bad adapter" },
74 { CS_BAD_ATTRIBUTE, "Bad attribute", },
75 { CS_BAD_BASE, "Bad base address" },
76 { CS_BAD_EDC, "Bad EDC" },
77 { CS_BAD_IRQ, "Bad IRQ" },
78 { CS_BAD_OFFSET, "Bad offset" },
79 { CS_BAD_PAGE, "Bad page number" },
80 { CS_READ_FAILURE, "Read failure" },
81 { CS_BAD_SIZE, "Bad size" },
82 { CS_BAD_SOCKET, "Bad socket" },
83 { CS_BAD_TYPE, "Bad type" },
84 { CS_BAD_VCC, "Bad Vcc" },
85 { CS_BAD_VPP, "Bad Vpp" },
86 { CS_BAD_WINDOW, "Bad window" },
87 { CS_WRITE_FAILURE, "Write failure" },
88 { CS_NO_CARD, "No card present" },
89 { CS_UNSUPPORTED_FUNCTION, "Usupported function" },
90 { CS_UNSUPPORTED_MODE, "Unsupported mode" },
91 { CS_BAD_SPEED, "Bad speed" },
92 { CS_BUSY, "Resource busy" },
93 { CS_GENERAL_FAILURE, "General failure" },
94 { CS_WRITE_PROTECTED, "Write protected" },
95 { CS_BAD_ARG_LENGTH, "Bad argument length" },
96 { CS_BAD_ARGS, "Bad arguments" },
97 { CS_CONFIGURATION_LOCKED, "Configuration locked" },
98 { CS_IN_USE, "Resource in use" },
99 { CS_NO_MORE_ITEMS, "No more items" },
100 { CS_OUT_OF_RESOURCE, "Out of resource" },
101 { CS_BAD_HANDLE, "Bad handle" },
102 { CS_BAD_TUPLE, "Bad CIS tuple" }
103 };
104
105
106 static const lookup_t service_table[] = {
107 { AccessConfigurationRegister, "AccessConfigurationRegister" },
108 { AddSocketServices, "AddSocketServices" },
109 { AdjustResourceInfo, "AdjustResourceInfo" },
110 { CheckEraseQueue, "CheckEraseQueue" },
111 { CloseMemory, "CloseMemory" },
112 { DeregisterClient, "DeregisterClient" },
113 { DeregisterEraseQueue, "DeregisterEraseQueue" },
114 { GetCardServicesInfo, "GetCardServicesInfo" },
115 { GetClientInfo, "GetClientInfo" },
116 { GetConfigurationInfo, "GetConfigurationInfo" },
117 { GetEventMask, "GetEventMask" },
118 { GetFirstClient, "GetFirstClient" },
119 { GetFirstRegion, "GetFirstRegion" },
120 { GetFirstTuple, "GetFirstTuple" },
121 { GetNextClient, "GetNextClient" },
122 { GetNextRegion, "GetNextRegion" },
123 { GetNextTuple, "GetNextTuple" },
124 { GetStatus, "GetStatus" },
125 { GetTupleData, "GetTupleData" },
126 { MapMemPage, "MapMemPage" },
127 { ModifyConfiguration, "ModifyConfiguration" },
128 { ModifyWindow, "ModifyWindow" },
129 { OpenMemory, "OpenMemory" },
130 { ParseTuple, "ParseTuple" },
131 { ReadMemory, "ReadMemory" },
132 { RegisterClient, "RegisterClient" },
133 { RegisterEraseQueue, "RegisterEraseQueue" },
134 { RegisterMTD, "RegisterMTD" },
135 { ReleaseConfiguration, "ReleaseConfiguration" },
136 { ReleaseIO, "ReleaseIO" },
137 { ReleaseIRQ, "ReleaseIRQ" },
138 { ReleaseWindow, "ReleaseWindow" },
139 { RequestConfiguration, "RequestConfiguration" },
140 { RequestIO, "RequestIO" },
141 { RequestIRQ, "RequestIRQ" },
142 { RequestSocketMask, "RequestSocketMask" },
143 { RequestWindow, "RequestWindow" },
144 { ResetCard, "ResetCard" },
145 { SetEventMask, "SetEventMask" },
146 { ValidateCIS, "ValidateCIS" },
147 { WriteMemory, "WriteMemory" },
148 { BindDevice, "BindDevice" },
149 { BindMTD, "BindMTD" },
150 { ReportError, "ReportError" },
151 { SuspendCard, "SuspendCard" },
152 { ResumeCard, "ResumeCard" },
153 { EjectCard, "EjectCard" },
154 { InsertCard, "InsertCard" },
155 { ReplaceCIS, "ReplaceCIS" }
156 };
157
158
159 static int pcmcia_report_error(struct pcmcia_device *p_dev, error_info_t *err)
160 {
161 int i;
162 char *serv;
163
164 if (!p_dev)
165 printk(KERN_NOTICE);
166 else
167 printk(KERN_NOTICE "%s: ", p_dev->dev.bus_id);
168
169 for (i = 0; i < ARRAY_SIZE(service_table); i++)
170 if (service_table[i].key == err->func)
171 break;
172 if (i < ARRAY_SIZE(service_table))
173 serv = service_table[i].msg;
174 else
175 serv = "Unknown service number";
176
177 for (i = 0; i < ARRAY_SIZE(error_table); i++)
178 if (error_table[i].key == err->retcode)
179 break;
180 if (i < ARRAY_SIZE(error_table))
181 printk("%s: %s\n", serv, error_table[i].msg);
182 else
183 printk("%s: Unknown error code %#x\n", serv, err->retcode);
184
185 return CS_SUCCESS;
186 } /* report_error */
187
188 /* end of code which was in cs.c before */
189
190 /*======================================================================*/
191
192 void cs_error(struct pcmcia_device *p_dev, int func, int ret)
193 {
194 error_info_t err = { func, ret };
195 pcmcia_report_error(p_dev, &err);
196 }
197 EXPORT_SYMBOL(cs_error);
198
199
200 static void pcmcia_check_driver(struct pcmcia_driver *p_drv)
201 {
202 struct pcmcia_device_id *did = p_drv->id_table;
203 unsigned int i;
204 u32 hash;
205
206 if (!p_drv->probe || !p_drv->remove)
207 printk(KERN_DEBUG "pcmcia: %s lacks a requisite callback "
208 "function\n", p_drv->drv.name);
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->devname);
356 kfree(p_dev);
357 }
358
359
360 static int pcmcia_device_probe(struct device * dev)
361 {
362 struct pcmcia_device *p_dev;
363 struct pcmcia_driver *p_drv;
364 struct pcmcia_socket *s;
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 s = p_dev->socket;
374
375 if ((!p_drv->probe) || (!try_module_get(p_drv->owner))) {
376 ret = -EINVAL;
377 goto put_dev;
378 }
379
380 p_dev->state &= ~CLIENT_UNBOUND;
381
382 /* set up the device configuration, if it hasn't been done before */
383 if (!s->functions) {
384 cistpl_longlink_mfc_t mfc;
385 if (pccard_read_tuple(s, p_dev->func, CISTPL_LONGLINK_MFC,
386 &mfc) == CS_SUCCESS)
387 s->functions = mfc.nfn;
388 else
389 s->functions = 1;
390 s->config = kmalloc(sizeof(config_t) * s->functions,
391 GFP_KERNEL);
392 if (!s->config) {
393 ret = -ENOMEM;
394 goto put_module;
395 }
396 memset(s->config, 0, sizeof(config_t) * s->functions);
397 }
398
399 ret = p_drv->probe(p_dev);
400
401 put_module:
402 if (ret)
403 module_put(p_drv->owner);
404 put_dev:
405 if (ret)
406 put_device(dev);
407 return (ret);
408 }
409
410
411 static int pcmcia_device_remove(struct device * dev)
412 {
413 struct pcmcia_device *p_dev;
414 struct pcmcia_driver *p_drv;
415 int i;
416
417 /* detach the "instance" */
418 p_dev = to_pcmcia_dev(dev);
419 p_drv = to_pcmcia_drv(dev->driver);
420 if (!p_drv)
421 return 0;
422
423 if (p_drv->remove)
424 p_drv->remove(p_dev);
425
426 /* check for proper unloading */
427 if (p_dev->state & (CLIENT_IRQ_REQ|CLIENT_IO_REQ|CLIENT_CONFIG_LOCKED))
428 printk(KERN_INFO "pcmcia: driver %s did not release config properly\n",
429 p_drv->drv.name);
430
431 for (i = 0; i < MAX_WIN; i++)
432 if (p_dev->state & CLIENT_WIN_REQ(i))
433 printk(KERN_INFO "pcmcia: driver %s did not release windows properly\n",
434 p_drv->drv.name);
435
436 /* references from pcmcia_probe_device */
437 p_dev->state = CLIENT_UNBOUND;
438 pcmcia_put_dev(p_dev);
439 module_put(p_drv->owner);
440
441 return 0;
442 }
443
444
445 /*
446 * Removes a PCMCIA card from the device tree and socket list.
447 */
448 static void pcmcia_card_remove(struct pcmcia_socket *s)
449 {
450 struct pcmcia_device *p_dev;
451 unsigned long flags;
452
453 ds_dbg(2, "unbind_request(%d)\n", s->sock);
454
455 s->device_count = 0;
456
457 for (;;) {
458 /* unregister all pcmcia_devices registered with this socket*/
459 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
460 if (list_empty(&s->devices_list)) {
461 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
462 return;
463 }
464 p_dev = list_entry((&s->devices_list)->next, struct pcmcia_device, socket_device_list);
465 list_del(&p_dev->socket_device_list);
466 p_dev->state |= CLIENT_STALE;
467 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
468
469 device_unregister(&p_dev->dev);
470 }
471
472 return;
473 } /* unbind_request */
474
475
476 /*
477 * pcmcia_device_query -- determine information about a pcmcia device
478 */
479 static int pcmcia_device_query(struct pcmcia_device *p_dev)
480 {
481 cistpl_manfid_t manf_id;
482 cistpl_funcid_t func_id;
483 cistpl_vers_1_t *vers1;
484 unsigned int i;
485
486 vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL);
487 if (!vers1)
488 return -ENOMEM;
489
490 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
491 CISTPL_MANFID, &manf_id)) {
492 p_dev->manf_id = manf_id.manf;
493 p_dev->card_id = manf_id.card;
494 p_dev->has_manf_id = 1;
495 p_dev->has_card_id = 1;
496 }
497
498 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
499 CISTPL_FUNCID, &func_id)) {
500 p_dev->func_id = func_id.func;
501 p_dev->has_func_id = 1;
502 } else {
503 /* rule of thumb: cards with no FUNCID, but with
504 * common memory device geometry information, are
505 * probably memory cards (from pcmcia-cs) */
506 cistpl_device_geo_t *devgeo;
507
508 devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL);
509 if (!devgeo) {
510 kfree(vers1);
511 return -ENOMEM;
512 }
513 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
514 CISTPL_DEVICE_GEO, devgeo)) {
515 ds_dbg(0, "mem device geometry probably means "
516 "FUNCID_MEMORY\n");
517 p_dev->func_id = CISTPL_FUNCID_MEMORY;
518 p_dev->has_func_id = 1;
519 }
520 kfree(devgeo);
521 }
522
523 if (!pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_VERS_1,
524 vers1)) {
525 for (i=0; i < vers1->ns; i++) {
526 char *tmp;
527 unsigned int length;
528
529 tmp = vers1->str + vers1->ofs[i];
530
531 length = strlen(tmp) + 1;
532 if ((length < 3) || (length > 255))
533 continue;
534
535 p_dev->prod_id[i] = kmalloc(sizeof(char) * length,
536 GFP_KERNEL);
537 if (!p_dev->prod_id[i])
538 continue;
539
540 p_dev->prod_id[i] = strncpy(p_dev->prod_id[i],
541 tmp, length);
542 }
543 }
544
545 kfree(vers1);
546 return 0;
547 }
548
549
550 /* device_add_lock is needed to avoid double registration by cardmgr and kernel.
551 * Serializes pcmcia_device_add; will most likely be removed in future.
552 *
553 * While it has the caveat that adding new PCMCIA devices inside(!) device_register()
554 * won't work, this doesn't matter much at the moment: the driver core doesn't
555 * support it either.
556 */
557 static DECLARE_MUTEX(device_add_lock);
558
559 struct pcmcia_device * pcmcia_device_add(struct pcmcia_socket *s, unsigned int function)
560 {
561 struct pcmcia_device *p_dev;
562 unsigned long flags;
563 int bus_id_len;
564
565 s = pcmcia_get_socket(s);
566 if (!s)
567 return NULL;
568
569 down(&device_add_lock);
570
571 /* max of 2 devices per card */
572 if (s->device_count == 2)
573 goto err_put;
574
575 p_dev = kmalloc(sizeof(struct pcmcia_device), GFP_KERNEL);
576 if (!p_dev)
577 goto err_put;
578 memset(p_dev, 0, sizeof(struct pcmcia_device));
579
580 p_dev->socket = s;
581 p_dev->device_no = (s->device_count++);
582 p_dev->func = function;
583
584 p_dev->dev.bus = &pcmcia_bus_type;
585 p_dev->dev.parent = s->dev.dev;
586 p_dev->dev.release = pcmcia_release_dev;
587 bus_id_len = sprintf (p_dev->dev.bus_id, "%d.%d", p_dev->socket->sock, p_dev->device_no);
588
589 p_dev->devname = kmalloc(6 + bus_id_len + 1, GFP_KERNEL);
590 if (!p_dev->devname)
591 goto err_free;
592 sprintf (p_dev->devname, "pcmcia%s", p_dev->dev.bus_id);
593
594 /* compat */
595 p_dev->state = CLIENT_UNBOUND;
596
597 /* Add to the list in pcmcia_bus_socket */
598 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
599 list_add_tail(&p_dev->socket_device_list, &s->devices_list);
600 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
601
602 printk(KERN_NOTICE "pcmcia: registering new device %s\n",
603 p_dev->devname);
604
605 pcmcia_device_query(p_dev);
606
607 if (device_register(&p_dev->dev)) {
608 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
609 list_del(&p_dev->socket_device_list);
610 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
611
612 goto err_free;
613 }
614
615 up(&device_add_lock);
616
617 return p_dev;
618
619 err_free:
620 kfree(p_dev->devname);
621 kfree(p_dev);
622 s->device_count--;
623 err_put:
624 up(&device_add_lock);
625 pcmcia_put_socket(s);
626
627 return NULL;
628 }
629
630
631 static int pcmcia_card_add(struct pcmcia_socket *s)
632 {
633 cisinfo_t cisinfo;
634 cistpl_longlink_mfc_t mfc;
635 unsigned int no_funcs, i;
636 int ret = 0;
637
638 if (!(s->resource_setup_done))
639 return -EAGAIN; /* try again, but later... */
640
641 if (pcmcia_validate_mem(s))
642 return -EAGAIN; /* try again, but later... */
643
644 ret = pccard_validate_cis(s, BIND_FN_ALL, &cisinfo);
645 if (ret || !cisinfo.Chains) {
646 ds_dbg(0, "invalid CIS or invalid resources\n");
647 return -ENODEV;
648 }
649
650 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
651 no_funcs = mfc.nfn;
652 else
653 no_funcs = 1;
654
655 for (i=0; i < no_funcs; i++)
656 pcmcia_device_add(s, i);
657
658 return (ret);
659 }
660
661
662 static void pcmcia_delayed_add_pseudo_device(void *data)
663 {
664 struct pcmcia_socket *s = data;
665 pcmcia_device_add(s, 0);
666 s->pcmcia_state.device_add_pending = 0;
667 }
668
669 static inline void pcmcia_add_pseudo_device(struct pcmcia_socket *s)
670 {
671 if (!s->pcmcia_state.device_add_pending) {
672 s->pcmcia_state.device_add_pending = 1;
673 schedule_work(&s->device_add);
674 }
675 return;
676 }
677
678 static int pcmcia_requery(struct device *dev, void * _data)
679 {
680 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
681 if (!p_dev->dev.driver)
682 pcmcia_device_query(p_dev);
683
684 return 0;
685 }
686
687 static void pcmcia_bus_rescan(struct pcmcia_socket *skt)
688 {
689 int no_devices=0;
690 unsigned long flags;
691
692 /* must be called with skt_sem held */
693 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
694 if (list_empty(&skt->devices_list))
695 no_devices=1;
696 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
697
698 /* if no devices were added for this socket yet because of
699 * missing resource information or other trouble, we need to
700 * do this now. */
701 if (no_devices) {
702 int ret = pcmcia_card_add(skt);
703 if (ret)
704 return;
705 }
706
707 /* some device information might have changed because of a CIS
708 * update or because we can finally read it correctly... so
709 * determine it again, overwriting old values if necessary. */
710 bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery);
711
712 /* we re-scan all devices, not just the ones connected to this
713 * socket. This does not matter, though. */
714 bus_rescan_devices(&pcmcia_bus_type);
715 }
716
717 static inline int pcmcia_devmatch(struct pcmcia_device *dev,
718 struct pcmcia_device_id *did)
719 {
720 if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
721 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
722 return 0;
723 }
724
725 if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
726 if ((!dev->has_card_id) || (dev->card_id != did->card_id))
727 return 0;
728 }
729
730 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
731 if (dev->func != did->function)
732 return 0;
733 }
734
735 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
736 if (!dev->prod_id[0])
737 return 0;
738 if (strcmp(did->prod_id[0], dev->prod_id[0]))
739 return 0;
740 }
741
742 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
743 if (!dev->prod_id[1])
744 return 0;
745 if (strcmp(did->prod_id[1], dev->prod_id[1]))
746 return 0;
747 }
748
749 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
750 if (!dev->prod_id[2])
751 return 0;
752 if (strcmp(did->prod_id[2], dev->prod_id[2]))
753 return 0;
754 }
755
756 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
757 if (!dev->prod_id[3])
758 return 0;
759 if (strcmp(did->prod_id[3], dev->prod_id[3]))
760 return 0;
761 }
762
763 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
764 /* handle pseudo multifunction devices:
765 * there are at most two pseudo multifunction devices.
766 * if we're matching against the first, schedule a
767 * call which will then check whether there are two
768 * pseudo devices, and if not, add the second one.
769 */
770 if (dev->device_no == 0)
771 pcmcia_add_pseudo_device(dev->socket);
772
773 if (dev->device_no != did->device_no)
774 return 0;
775 }
776
777 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
778 if ((!dev->has_func_id) || (dev->func_id != did->func_id))
779 return 0;
780
781 /* if this is a pseudo-multi-function device,
782 * we need explicit matches */
783 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO)
784 return 0;
785 if (dev->device_no)
786 return 0;
787
788 /* also, FUNC_ID matching needs to be activated by userspace
789 * after it has re-checked that there is no possible module
790 * with a prod_id/manf_id/card_id match.
791 */
792 if (!dev->allow_func_id_match)
793 return 0;
794 }
795
796 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
797 if (!dev->socket->fake_cis)
798 pcmcia_load_firmware(dev, did->cisfile);
799
800 if (!dev->socket->fake_cis)
801 return 0;
802 }
803
804 if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
805 int i;
806 for (i=0; i<4; i++)
807 if (dev->prod_id[i])
808 return 0;
809 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
810 return 0;
811 }
812
813 dev->dev.driver_data = (void *) did;
814
815 return 1;
816 }
817
818
819 static int pcmcia_bus_match(struct device * dev, struct device_driver * drv) {
820 struct pcmcia_device * p_dev = to_pcmcia_dev(dev);
821 struct pcmcia_driver * p_drv = to_pcmcia_drv(drv);
822 struct pcmcia_device_id *did = p_drv->id_table;
823
824 /* matching by cardmgr */
825 if (p_dev->cardmgr == p_drv)
826 return 1;
827
828 while (did && did->match_flags) {
829 if (pcmcia_devmatch(p_dev, did))
830 return 1;
831 did++;
832 }
833
834 return 0;
835 }
836
837 #ifdef CONFIG_HOTPLUG
838
839 static int pcmcia_bus_uevent(struct device *dev, char **envp, int num_envp,
840 char *buffer, int buffer_size)
841 {
842 struct pcmcia_device *p_dev;
843 int i, length = 0;
844 u32 hash[4] = { 0, 0, 0, 0};
845
846 if (!dev)
847 return -ENODEV;
848
849 p_dev = to_pcmcia_dev(dev);
850
851 /* calculate hashes */
852 for (i=0; i<4; i++) {
853 if (!p_dev->prod_id[i])
854 continue;
855 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
856 }
857
858 i = 0;
859
860 if (add_uevent_var(envp, num_envp, &i,
861 buffer, buffer_size, &length,
862 "SOCKET_NO=%u",
863 p_dev->socket->sock))
864 return -ENOMEM;
865
866 if (add_uevent_var(envp, num_envp, &i,
867 buffer, buffer_size, &length,
868 "DEVICE_NO=%02X",
869 p_dev->device_no))
870 return -ENOMEM;
871
872 if (add_uevent_var(envp, num_envp, &i,
873 buffer, buffer_size, &length,
874 "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
875 "pa%08Xpb%08Xpc%08Xpd%08X",
876 p_dev->has_manf_id ? p_dev->manf_id : 0,
877 p_dev->has_card_id ? p_dev->card_id : 0,
878 p_dev->has_func_id ? p_dev->func_id : 0,
879 p_dev->func,
880 p_dev->device_no,
881 hash[0],
882 hash[1],
883 hash[2],
884 hash[3]))
885 return -ENOMEM;
886
887 envp[i] = NULL;
888
889 return 0;
890 }
891
892 #else
893
894 static int pcmcia_bus_uevent(struct device *dev, char **envp, int num_envp,
895 char *buffer, int buffer_size)
896 {
897 return -ENODEV;
898 }
899
900 #endif
901
902 /************************ per-device sysfs output ***************************/
903
904 #define pcmcia_device_attr(field, test, format) \
905 static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf) \
906 { \
907 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
908 return p_dev->test ? sprintf (buf, format, p_dev->field) : -ENODEV; \
909 }
910
911 #define pcmcia_device_stringattr(name, field) \
912 static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf) \
913 { \
914 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
915 return p_dev->field ? sprintf (buf, "%s\n", p_dev->field) : -ENODEV; \
916 }
917
918 pcmcia_device_attr(func, socket, "0x%02x\n");
919 pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
920 pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
921 pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
922 pcmcia_device_stringattr(prod_id1, prod_id[0]);
923 pcmcia_device_stringattr(prod_id2, prod_id[1]);
924 pcmcia_device_stringattr(prod_id3, prod_id[2]);
925 pcmcia_device_stringattr(prod_id4, prod_id[3]);
926
927 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
928 {
929 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
930 int i;
931 u32 hash[4] = { 0, 0, 0, 0};
932
933 /* calculate hashes */
934 for (i=0; i<4; i++) {
935 if (!p_dev->prod_id[i])
936 continue;
937 hash[i] = crc32(0,p_dev->prod_id[i],strlen(p_dev->prod_id[i]));
938 }
939 return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
940 "pa%08Xpb%08Xpc%08Xpd%08X\n",
941 p_dev->has_manf_id ? p_dev->manf_id : 0,
942 p_dev->has_card_id ? p_dev->card_id : 0,
943 p_dev->has_func_id ? p_dev->func_id : 0,
944 p_dev->func, p_dev->device_no,
945 hash[0], hash[1], hash[2], hash[3]);
946 }
947
948 static ssize_t pcmcia_store_allow_func_id_match(struct device *dev,
949 struct device_attribute *attr, const char *buf, size_t count)
950 {
951 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
952 if (!count)
953 return -EINVAL;
954
955 down(&p_dev->socket->skt_sem);
956 p_dev->allow_func_id_match = 1;
957 up(&p_dev->socket->skt_sem);
958
959 bus_rescan_devices(&pcmcia_bus_type);
960
961 return count;
962 }
963
964 static struct device_attribute pcmcia_dev_attrs[] = {
965 __ATTR(function, 0444, func_show, NULL),
966 __ATTR_RO(func_id),
967 __ATTR_RO(manf_id),
968 __ATTR_RO(card_id),
969 __ATTR_RO(prod_id1),
970 __ATTR_RO(prod_id2),
971 __ATTR_RO(prod_id3),
972 __ATTR_RO(prod_id4),
973 __ATTR_RO(modalias),
974 __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match),
975 __ATTR_NULL,
976 };
977
978 /* PM support, also needed for reset */
979
980 static int pcmcia_dev_suspend(struct device * dev, pm_message_t state)
981 {
982 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
983 struct pcmcia_driver *p_drv = NULL;
984
985 if (dev->driver)
986 p_drv = to_pcmcia_drv(dev->driver);
987
988 if (p_drv && p_drv->suspend)
989 return p_drv->suspend(p_dev);
990
991 return 0;
992 }
993
994
995 static int pcmcia_dev_resume(struct device * dev)
996 {
997 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
998 struct pcmcia_driver *p_drv = NULL;
999
1000 if (dev->driver)
1001 p_drv = to_pcmcia_drv(dev->driver);
1002
1003 if (p_drv && p_drv->resume)
1004 return p_drv->resume(p_dev);
1005
1006 return 0;
1007 }
1008
1009
1010 static int pcmcia_bus_suspend_callback(struct device *dev, void * _data)
1011 {
1012 struct pcmcia_socket *skt = _data;
1013 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1014
1015 if (p_dev->socket != skt)
1016 return 0;
1017
1018 return dpm_runtime_suspend(dev, PMSG_SUSPEND);
1019 }
1020
1021 static int pcmcia_bus_resume_callback(struct device *dev, void * _data)
1022 {
1023 struct pcmcia_socket *skt = _data;
1024 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1025
1026 if (p_dev->socket != skt)
1027 return 0;
1028
1029 dpm_runtime_resume(dev);
1030
1031 return 0;
1032 }
1033
1034 static int pcmcia_bus_resume(struct pcmcia_socket *skt)
1035 {
1036 bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback);
1037 return 0;
1038 }
1039
1040 static int pcmcia_bus_suspend(struct pcmcia_socket *skt)
1041 {
1042 if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt,
1043 pcmcia_bus_suspend_callback)) {
1044 pcmcia_bus_resume(skt);
1045 return -EIO;
1046 }
1047 return 0;
1048 }
1049
1050
1051 /*======================================================================
1052
1053 The card status event handler.
1054
1055 ======================================================================*/
1056
1057 /* Normally, the event is passed to individual drivers after
1058 * informing userspace. Only for CS_EVENT_CARD_REMOVAL this
1059 * is inversed to maintain historic compatibility.
1060 */
1061
1062 static int ds_event(struct pcmcia_socket *skt, event_t event, int priority)
1063 {
1064 struct pcmcia_socket *s = pcmcia_get_socket(skt);
1065
1066 ds_dbg(1, "ds_event(0x%06x, %d, 0x%p)\n",
1067 event, priority, skt);
1068
1069 switch (event) {
1070 case CS_EVENT_CARD_REMOVAL:
1071 s->pcmcia_state.present = 0;
1072 pcmcia_card_remove(skt);
1073 handle_event(skt, event);
1074 break;
1075
1076 case CS_EVENT_CARD_INSERTION:
1077 s->pcmcia_state.present = 1;
1078 pcmcia_card_add(skt);
1079 handle_event(skt, event);
1080 break;
1081
1082 case CS_EVENT_EJECTION_REQUEST:
1083 break;
1084
1085 case CS_EVENT_PM_SUSPEND:
1086 case CS_EVENT_PM_RESUME:
1087 case CS_EVENT_RESET_PHYSICAL:
1088 case CS_EVENT_CARD_RESET:
1089 default:
1090 handle_event(skt, event);
1091 break;
1092 }
1093
1094 pcmcia_put_socket(s);
1095
1096 return 0;
1097 } /* ds_event */
1098
1099
1100 static struct pcmcia_callback pcmcia_bus_callback = {
1101 .owner = THIS_MODULE,
1102 .event = ds_event,
1103 .requery = pcmcia_bus_rescan,
1104 .suspend = pcmcia_bus_suspend,
1105 .resume = pcmcia_bus_resume,
1106 };
1107
1108 static int __devinit pcmcia_bus_add_socket(struct class_device *class_dev,
1109 struct class_interface *class_intf)
1110 {
1111 struct pcmcia_socket *socket = class_get_devdata(class_dev);
1112 int ret;
1113
1114 socket = pcmcia_get_socket(socket);
1115 if (!socket) {
1116 printk(KERN_ERR "PCMCIA obtaining reference to socket %p failed\n", socket);
1117 return -ENODEV;
1118 }
1119
1120 /*
1121 * Ugly. But we want to wait for the socket threads to have started up.
1122 * We really should let the drivers themselves drive some of this..
1123 */
1124 msleep(250);
1125
1126 #ifdef CONFIG_PCMCIA_IOCTL
1127 init_waitqueue_head(&socket->queue);
1128 #endif
1129 INIT_LIST_HEAD(&socket->devices_list);
1130 INIT_WORK(&socket->device_add, pcmcia_delayed_add_pseudo_device, socket);
1131 memset(&socket->pcmcia_state, 0, sizeof(u8));
1132 socket->device_count = 0;
1133
1134 ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback);
1135 if (ret) {
1136 printk(KERN_ERR "PCMCIA registration PCCard core failed for socket %p\n", socket);
1137 pcmcia_put_socket(socket);
1138 return (ret);
1139 }
1140
1141 return 0;
1142 }
1143
1144 static void pcmcia_bus_remove_socket(struct class_device *class_dev,
1145 struct class_interface *class_intf)
1146 {
1147 struct pcmcia_socket *socket = class_get_devdata(class_dev);
1148
1149 if (!socket)
1150 return;
1151
1152 socket->pcmcia_state.dead = 1;
1153 pccard_register_pcmcia(socket, NULL);
1154
1155 pcmcia_put_socket(socket);
1156
1157 return;
1158 }
1159
1160
1161 /* the pcmcia_bus_interface is used to handle pcmcia socket devices */
1162 static struct class_interface pcmcia_bus_interface = {
1163 .class = &pcmcia_socket_class,
1164 .add = &pcmcia_bus_add_socket,
1165 .remove = &pcmcia_bus_remove_socket,
1166 };
1167
1168
1169 struct bus_type pcmcia_bus_type = {
1170 .name = "pcmcia",
1171 .uevent = pcmcia_bus_uevent,
1172 .match = pcmcia_bus_match,
1173 .dev_attrs = pcmcia_dev_attrs,
1174 .suspend = pcmcia_dev_suspend,
1175 .resume = pcmcia_dev_resume,
1176 };
1177
1178
1179 static int __init init_pcmcia_bus(void)
1180 {
1181 spin_lock_init(&pcmcia_dev_list_lock);
1182
1183 bus_register(&pcmcia_bus_type);
1184 class_interface_register(&pcmcia_bus_interface);
1185
1186 pcmcia_setup_ioctl();
1187
1188 return 0;
1189 }
1190 fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that
1191 * pcmcia_socket_class is already registered */
1192
1193
1194 static void __exit exit_pcmcia_bus(void)
1195 {
1196 pcmcia_cleanup_ioctl();
1197
1198 class_interface_unregister(&pcmcia_bus_interface);
1199
1200 bus_unregister(&pcmcia_bus_type);
1201 }
1202 module_exit(exit_pcmcia_bus);
1203
1204
1205 MODULE_ALIAS("ds");
Linux kernel - Deliverables
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