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[PATCH] pcmcia: multifunction card handling fixes
[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 - 2006 Dominik Brodowski
14 */
15
16 #include <linux/kernel.h>
17 #include <linux/module.h>
18 #include <linux/init.h>
19 #include <linux/errno.h>
20 #include <linux/list.h>
21 #include <linux/delay.h>
22 #include <linux/workqueue.h>
23 #include <linux/crc32.h>
24 #include <linux/firmware.h>
25 #include <linux/kref.h>
26
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 /*======================================================================*/
235
236
237 /**
238 * pcmcia_register_driver - register a PCMCIA driver with the bus core
239 *
240 * Registers a PCMCIA driver with the PCMCIA bus core.
241 */
242 int pcmcia_register_driver(struct pcmcia_driver *driver)
243 {
244 if (!driver)
245 return -EINVAL;
246
247 pcmcia_check_driver(driver);
248
249 /* initialize common fields */
250 driver->drv.bus = &pcmcia_bus_type;
251 driver->drv.owner = driver->owner;
252
253 return driver_register(&driver->drv);
254 }
255 EXPORT_SYMBOL(pcmcia_register_driver);
256
257 /**
258 * pcmcia_unregister_driver - unregister a PCMCIA driver with the bus core
259 */
260 void pcmcia_unregister_driver(struct pcmcia_driver *driver)
261 {
262 driver_unregister(&driver->drv);
263 }
264 EXPORT_SYMBOL(pcmcia_unregister_driver);
265
266
267 /* pcmcia_device handling */
268
269 struct pcmcia_device * pcmcia_get_dev(struct pcmcia_device *p_dev)
270 {
271 struct device *tmp_dev;
272 tmp_dev = get_device(&p_dev->dev);
273 if (!tmp_dev)
274 return NULL;
275 return to_pcmcia_dev(tmp_dev);
276 }
277
278 void pcmcia_put_dev(struct pcmcia_device *p_dev)
279 {
280 if (p_dev)
281 put_device(&p_dev->dev);
282 }
283
284 static void pcmcia_release_function(struct kref *ref)
285 {
286 struct config_t *c = container_of(ref, struct config_t, ref);
287 kfree(c);
288 }
289
290 static void pcmcia_release_dev(struct device *dev)
291 {
292 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
293 ds_dbg(1, "releasing dev %p\n", p_dev);
294 pcmcia_put_socket(p_dev->socket);
295 kfree(p_dev->devname);
296 kref_put(&p_dev->function_config->ref, pcmcia_release_function);
297 kfree(p_dev);
298 }
299
300 static void pcmcia_add_device_later(struct pcmcia_socket *s, int mfc)
301 {
302 if (!s->pcmcia_state.device_add_pending) {
303 s->pcmcia_state.device_add_pending = 1;
304 s->pcmcia_state.mfc_pfc = mfc;
305 schedule_work(&s->device_add);
306 }
307 return;
308 }
309
310 static int pcmcia_device_probe(struct device * dev)
311 {
312 struct pcmcia_device *p_dev;
313 struct pcmcia_driver *p_drv;
314 struct pcmcia_device_id *did;
315 struct pcmcia_socket *s;
316 int ret = 0;
317
318 dev = get_device(dev);
319 if (!dev)
320 return -ENODEV;
321
322 p_dev = to_pcmcia_dev(dev);
323 p_drv = to_pcmcia_drv(dev->driver);
324 s = p_dev->socket;
325
326 if ((!p_drv->probe) || (!p_dev->function_config) ||
327 (!try_module_get(p_drv->owner))) {
328 ret = -EINVAL;
329 goto put_dev;
330 }
331
332 ret = p_drv->probe(p_dev);
333 if (ret)
334 goto put_module;
335
336 /* handle pseudo multifunction devices:
337 * there are at most two pseudo multifunction devices.
338 * if we're matching against the first, schedule a
339 * call which will then check whether there are two
340 * pseudo devices, and if not, add the second one.
341 */
342 did = p_dev->dev.driver_data;
343 if (did && (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) &&
344 (p_dev->socket->device_count == 1) && (p_dev->device_no == 0))
345 pcmcia_add_device_later(p_dev->socket, 0);
346
347 put_module:
348 if (ret)
349 module_put(p_drv->owner);
350 put_dev:
351 if (ret)
352 put_device(dev);
353 return (ret);
354 }
355
356
357 /*
358 * Removes a PCMCIA card from the device tree and socket list.
359 */
360 static void pcmcia_card_remove(struct pcmcia_socket *s, struct pcmcia_device *leftover)
361 {
362 struct pcmcia_device *p_dev;
363 struct pcmcia_device *tmp;
364 unsigned long flags;
365
366 ds_dbg(2, "unbind_request(%d)\n", s->sock);
367
368
369 if (!leftover)
370 s->device_count = 0;
371 else
372 s->device_count = 1;
373
374 /* unregister all pcmcia_devices registered with this socket, except leftover */
375 list_for_each_entry_safe(p_dev, tmp, &s->devices_list, socket_device_list) {
376 if (p_dev == leftover)
377 continue;
378
379 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
380 list_del(&p_dev->socket_device_list);
381 p_dev->_removed=1;
382 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
383
384 device_unregister(&p_dev->dev);
385 }
386
387 return;
388 }
389
390 static int pcmcia_device_remove(struct device * dev)
391 {
392 struct pcmcia_device *p_dev;
393 struct pcmcia_driver *p_drv;
394 struct pcmcia_device_id *did;
395 int i;
396
397 p_dev = to_pcmcia_dev(dev);
398 p_drv = to_pcmcia_drv(dev->driver);
399
400 /* If we're removing the primary module driving a
401 * pseudo multi-function card, we need to unbind
402 * all devices
403 */
404 did = p_dev->dev.driver_data;
405 if (did && (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) &&
406 (p_dev->socket->device_count != 0) &&
407 (p_dev->device_no == 0))
408 pcmcia_card_remove(p_dev->socket, p_dev);
409
410 /* detach the "instance" */
411 if (!p_drv)
412 return 0;
413
414 if (p_drv->remove)
415 p_drv->remove(p_dev);
416
417 p_dev->dev_node = NULL;
418
419 /* check for proper unloading */
420 if (p_dev->_irq || p_dev->_io || p_dev->_locked)
421 printk(KERN_INFO "pcmcia: driver %s did not release config properly\n",
422 p_drv->drv.name);
423
424 for (i = 0; i < MAX_WIN; i++)
425 if (p_dev->_win & CLIENT_WIN_REQ(i))
426 printk(KERN_INFO "pcmcia: driver %s did not release windows properly\n",
427 p_drv->drv.name);
428
429 /* references from pcmcia_probe_device */
430 pcmcia_put_dev(p_dev);
431 module_put(p_drv->owner);
432
433 return 0;
434 }
435
436
437 /*
438 * pcmcia_device_query -- determine information about a pcmcia device
439 */
440 static int pcmcia_device_query(struct pcmcia_device *p_dev)
441 {
442 cistpl_manfid_t manf_id;
443 cistpl_funcid_t func_id;
444 cistpl_vers_1_t *vers1;
445 unsigned int i;
446
447 vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL);
448 if (!vers1)
449 return -ENOMEM;
450
451 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
452 CISTPL_MANFID, &manf_id)) {
453 p_dev->manf_id = manf_id.manf;
454 p_dev->card_id = manf_id.card;
455 p_dev->has_manf_id = 1;
456 p_dev->has_card_id = 1;
457 }
458
459 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
460 CISTPL_FUNCID, &func_id)) {
461 p_dev->func_id = func_id.func;
462 p_dev->has_func_id = 1;
463 } else {
464 /* rule of thumb: cards with no FUNCID, but with
465 * common memory device geometry information, are
466 * probably memory cards (from pcmcia-cs) */
467 cistpl_device_geo_t *devgeo;
468
469 devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL);
470 if (!devgeo) {
471 kfree(vers1);
472 return -ENOMEM;
473 }
474 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
475 CISTPL_DEVICE_GEO, devgeo)) {
476 ds_dbg(0, "mem device geometry probably means "
477 "FUNCID_MEMORY\n");
478 p_dev->func_id = CISTPL_FUNCID_MEMORY;
479 p_dev->has_func_id = 1;
480 }
481 kfree(devgeo);
482 }
483
484 if (!pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_VERS_1,
485 vers1)) {
486 for (i=0; i < vers1->ns; i++) {
487 char *tmp;
488 unsigned int length;
489
490 tmp = vers1->str + vers1->ofs[i];
491
492 length = strlen(tmp) + 1;
493 if ((length < 2) || (length > 255))
494 continue;
495
496 p_dev->prod_id[i] = kmalloc(sizeof(char) * length,
497 GFP_KERNEL);
498 if (!p_dev->prod_id[i])
499 continue;
500
501 p_dev->prod_id[i] = strncpy(p_dev->prod_id[i],
502 tmp, length);
503 }
504 }
505
506 kfree(vers1);
507 return 0;
508 }
509
510
511 /* device_add_lock is needed to avoid double registration by cardmgr and kernel.
512 * Serializes pcmcia_device_add; will most likely be removed in future.
513 *
514 * While it has the caveat that adding new PCMCIA devices inside(!) device_register()
515 * won't work, this doesn't matter much at the moment: the driver core doesn't
516 * support it either.
517 */
518 static DEFINE_MUTEX(device_add_lock);
519
520 struct pcmcia_device * pcmcia_device_add(struct pcmcia_socket *s, unsigned int function)
521 {
522 struct pcmcia_device *p_dev, *tmp_dev;
523 unsigned long flags;
524 int bus_id_len;
525
526 s = pcmcia_get_socket(s);
527 if (!s)
528 return NULL;
529
530 mutex_lock(&device_add_lock);
531
532 /* max of 2 devices per card */
533 if (s->device_count == 2)
534 goto err_put;
535
536 p_dev = kzalloc(sizeof(struct pcmcia_device), GFP_KERNEL);
537 if (!p_dev)
538 goto err_put;
539
540 p_dev->socket = s;
541 p_dev->device_no = (s->device_count++);
542 p_dev->func = function;
543
544 p_dev->dev.bus = &pcmcia_bus_type;
545 p_dev->dev.parent = s->dev.dev;
546 p_dev->dev.release = pcmcia_release_dev;
547 bus_id_len = sprintf (p_dev->dev.bus_id, "%d.%d", p_dev->socket->sock, p_dev->device_no);
548
549 p_dev->devname = kmalloc(6 + bus_id_len + 1, GFP_KERNEL);
550 if (!p_dev->devname)
551 goto err_free;
552 sprintf (p_dev->devname, "pcmcia%s", p_dev->dev.bus_id);
553
554 /* compat */
555 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
556
557 /*
558 * p_dev->function_config must be the same for all card functions.
559 * Note that this is serialized by the device_add_lock, so that
560 * only one such struct will be created.
561 */
562 list_for_each_entry(tmp_dev, &s->devices_list, socket_device_list)
563 if (p_dev->func == tmp_dev->func) {
564 p_dev->function_config = tmp_dev->function_config;
565 kref_get(&p_dev->function_config->ref);
566 }
567
568 /* Add to the list in pcmcia_bus_socket */
569 list_add(&p_dev->socket_device_list, &s->devices_list);
570
571 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
572
573 if (!p_dev->function_config) {
574 p_dev->function_config = kzalloc(sizeof(struct config_t),
575 GFP_KERNEL);
576 if (!p_dev->function_config)
577 goto err_unreg;
578 kref_init(&p_dev->function_config->ref);
579 }
580
581 printk(KERN_NOTICE "pcmcia: registering new device %s\n",
582 p_dev->devname);
583
584 pcmcia_device_query(p_dev);
585
586 if (device_register(&p_dev->dev))
587 goto err_unreg;
588
589 mutex_unlock(&device_add_lock);
590
591 return p_dev;
592
593 err_unreg:
594 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
595 list_del(&p_dev->socket_device_list);
596 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
597
598 err_free:
599 kfree(p_dev->devname);
600 kfree(p_dev);
601 s->device_count--;
602 err_put:
603 mutex_unlock(&device_add_lock);
604 pcmcia_put_socket(s);
605
606 return NULL;
607 }
608
609
610 static int pcmcia_card_add(struct pcmcia_socket *s)
611 {
612 cisinfo_t cisinfo;
613 cistpl_longlink_mfc_t mfc;
614 unsigned int no_funcs, i;
615 int ret = 0;
616
617 if (!(s->resource_setup_done))
618 return -EAGAIN; /* try again, but later... */
619
620 if (pcmcia_validate_mem(s))
621 return -EAGAIN; /* try again, but later... */
622
623 ret = pccard_validate_cis(s, BIND_FN_ALL, &cisinfo);
624 if (ret || !cisinfo.Chains) {
625 ds_dbg(0, "invalid CIS or invalid resources\n");
626 return -ENODEV;
627 }
628
629 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
630 no_funcs = mfc.nfn;
631 else
632 no_funcs = 1;
633 s->functions = no_funcs;
634
635 for (i=0; i < no_funcs; i++)
636 pcmcia_device_add(s, i);
637
638 return (ret);
639 }
640
641
642 static void pcmcia_delayed_add_device(void *data)
643 {
644 struct pcmcia_socket *s = data;
645 pcmcia_device_add(s, s->pcmcia_state.mfc_pfc);
646 s->pcmcia_state.device_add_pending = 0;
647 s->pcmcia_state.mfc_pfc = 0;
648 }
649
650 static int pcmcia_requery(struct device *dev, void * _data)
651 {
652 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
653 if (!p_dev->dev.driver)
654 pcmcia_device_query(p_dev);
655
656 return 0;
657 }
658
659 static void pcmcia_bus_rescan(struct pcmcia_socket *skt, int new_cis)
660 {
661 int no_devices = 0;
662 int ret = 0;
663 unsigned long flags;
664
665 /* must be called with skt_mutex held */
666 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
667 if (list_empty(&skt->devices_list))
668 no_devices = 1;
669 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
670
671 /* If this is because of a CIS override, start over */
672 if (new_cis && !no_devices)
673 pcmcia_card_remove(skt, NULL);
674
675 /* if no devices were added for this socket yet because of
676 * missing resource information or other trouble, we need to
677 * do this now. */
678 if (no_devices || new_cis) {
679 ret = pcmcia_card_add(skt);
680 if (ret)
681 return;
682 }
683
684 /* some device information might have changed because of a CIS
685 * update or because we can finally read it correctly... so
686 * determine it again, overwriting old values if necessary. */
687 bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery);
688
689 /* we re-scan all devices, not just the ones connected to this
690 * socket. This does not matter, though. */
691 ret = bus_rescan_devices(&pcmcia_bus_type);
692 if (ret)
693 printk(KERN_INFO "pcmcia: bus_rescan_devices failed\n");
694 }
695
696 #ifdef CONFIG_PCMCIA_LOAD_CIS
697
698 /**
699 * pcmcia_load_firmware - load CIS from userspace if device-provided is broken
700 * @dev - the pcmcia device which needs a CIS override
701 * @filename - requested filename in /lib/firmware/
702 *
703 * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if
704 * the one provided by the card is broken. The firmware files reside in
705 * /lib/firmware/ in userspace.
706 */
707 static int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
708 {
709 struct pcmcia_socket *s = dev->socket;
710 const struct firmware *fw;
711 char path[20];
712 int ret = -ENOMEM;
713 int no_funcs;
714 int old_funcs;
715 cisdump_t *cis;
716 cistpl_longlink_mfc_t mfc;
717
718 if (!filename)
719 return -EINVAL;
720
721 ds_dbg(1, "trying to load firmware %s\n", filename);
722
723 if (strlen(filename) > 14)
724 return -EINVAL;
725
726 snprintf(path, 20, "%s", filename);
727
728 if (request_firmware(&fw, path, &dev->dev) == 0) {
729 if (fw->size >= CISTPL_MAX_CIS_SIZE)
730 goto release;
731
732 cis = kzalloc(sizeof(cisdump_t), GFP_KERNEL);
733 if (!cis)
734 goto release;
735
736 cis->Length = fw->size + 1;
737 memcpy(cis->Data, fw->data, fw->size);
738
739 if (!pcmcia_replace_cis(s, cis))
740 ret = 0;
741
742 /* update information */
743 pcmcia_device_query(dev);
744
745 /* does this cis override add or remove functions? */
746 old_funcs = s->functions;
747
748 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
749 no_funcs = mfc.nfn;
750 else
751 no_funcs = 1;
752 s->functions = no_funcs;
753
754 if (old_funcs > no_funcs)
755 pcmcia_card_remove(s, dev);
756 else if (no_funcs > old_funcs)
757 pcmcia_add_device_later(s, 1);
758 }
759 release:
760 release_firmware(fw);
761
762 return (ret);
763 }
764
765 #else /* !CONFIG_PCMCIA_LOAD_CIS */
766
767 static inline int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
768 {
769 return -ENODEV;
770 }
771
772 #endif
773
774
775 static inline int pcmcia_devmatch(struct pcmcia_device *dev,
776 struct pcmcia_device_id *did)
777 {
778 if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
779 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
780 return 0;
781 }
782
783 if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
784 if ((!dev->has_card_id) || (dev->card_id != did->card_id))
785 return 0;
786 }
787
788 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
789 if (dev->func != did->function)
790 return 0;
791 }
792
793 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
794 if (!dev->prod_id[0])
795 return 0;
796 if (strcmp(did->prod_id[0], dev->prod_id[0]))
797 return 0;
798 }
799
800 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
801 if (!dev->prod_id[1])
802 return 0;
803 if (strcmp(did->prod_id[1], dev->prod_id[1]))
804 return 0;
805 }
806
807 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
808 if (!dev->prod_id[2])
809 return 0;
810 if (strcmp(did->prod_id[2], dev->prod_id[2]))
811 return 0;
812 }
813
814 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
815 if (!dev->prod_id[3])
816 return 0;
817 if (strcmp(did->prod_id[3], dev->prod_id[3]))
818 return 0;
819 }
820
821 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
822 if (dev->device_no != did->device_no)
823 return 0;
824 }
825
826 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
827 if ((!dev->has_func_id) || (dev->func_id != did->func_id))
828 return 0;
829
830 /* if this is a pseudo-multi-function device,
831 * we need explicit matches */
832 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO)
833 return 0;
834 if (dev->device_no)
835 return 0;
836
837 /* also, FUNC_ID matching needs to be activated by userspace
838 * after it has re-checked that there is no possible module
839 * with a prod_id/manf_id/card_id match.
840 */
841 if (!dev->allow_func_id_match)
842 return 0;
843 }
844
845 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
846 if (!dev->socket->fake_cis)
847 pcmcia_load_firmware(dev, did->cisfile);
848
849 if (!dev->socket->fake_cis)
850 return 0;
851 }
852
853 if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
854 int i;
855 for (i=0; i<4; i++)
856 if (dev->prod_id[i])
857 return 0;
858 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
859 return 0;
860 }
861
862 dev->dev.driver_data = (void *) did;
863
864 return 1;
865 }
866
867
868 static int pcmcia_bus_match(struct device * dev, struct device_driver * drv) {
869 struct pcmcia_device * p_dev = to_pcmcia_dev(dev);
870 struct pcmcia_driver * p_drv = to_pcmcia_drv(drv);
871 struct pcmcia_device_id *did = p_drv->id_table;
872
873 #ifdef CONFIG_PCMCIA_IOCTL
874 /* matching by cardmgr */
875 if (p_dev->cardmgr == p_drv)
876 return 1;
877 #endif
878
879 while (did && did->match_flags) {
880 if (pcmcia_devmatch(p_dev, did))
881 return 1;
882 did++;
883 }
884
885 return 0;
886 }
887
888 #ifdef CONFIG_HOTPLUG
889
890 static int pcmcia_bus_uevent(struct device *dev, char **envp, int num_envp,
891 char *buffer, int buffer_size)
892 {
893 struct pcmcia_device *p_dev;
894 int i, length = 0;
895 u32 hash[4] = { 0, 0, 0, 0};
896
897 if (!dev)
898 return -ENODEV;
899
900 p_dev = to_pcmcia_dev(dev);
901
902 /* calculate hashes */
903 for (i=0; i<4; i++) {
904 if (!p_dev->prod_id[i])
905 continue;
906 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
907 }
908
909 i = 0;
910
911 if (add_uevent_var(envp, num_envp, &i,
912 buffer, buffer_size, &length,
913 "SOCKET_NO=%u",
914 p_dev->socket->sock))
915 return -ENOMEM;
916
917 if (add_uevent_var(envp, num_envp, &i,
918 buffer, buffer_size, &length,
919 "DEVICE_NO=%02X",
920 p_dev->device_no))
921 return -ENOMEM;
922
923 if (add_uevent_var(envp, num_envp, &i,
924 buffer, buffer_size, &length,
925 "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
926 "pa%08Xpb%08Xpc%08Xpd%08X",
927 p_dev->has_manf_id ? p_dev->manf_id : 0,
928 p_dev->has_card_id ? p_dev->card_id : 0,
929 p_dev->has_func_id ? p_dev->func_id : 0,
930 p_dev->func,
931 p_dev->device_no,
932 hash[0],
933 hash[1],
934 hash[2],
935 hash[3]))
936 return -ENOMEM;
937
938 envp[i] = NULL;
939
940 return 0;
941 }
942
943 #else
944
945 static int pcmcia_bus_uevent(struct device *dev, char **envp, int num_envp,
946 char *buffer, int buffer_size)
947 {
948 return -ENODEV;
949 }
950
951 #endif
952
953 /************************ per-device sysfs output ***************************/
954
955 #define pcmcia_device_attr(field, test, format) \
956 static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf) \
957 { \
958 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
959 return p_dev->test ? sprintf (buf, format, p_dev->field) : -ENODEV; \
960 }
961
962 #define pcmcia_device_stringattr(name, field) \
963 static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf) \
964 { \
965 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
966 return p_dev->field ? sprintf (buf, "%s\n", p_dev->field) : -ENODEV; \
967 }
968
969 pcmcia_device_attr(func, socket, "0x%02x\n");
970 pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
971 pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
972 pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
973 pcmcia_device_stringattr(prod_id1, prod_id[0]);
974 pcmcia_device_stringattr(prod_id2, prod_id[1]);
975 pcmcia_device_stringattr(prod_id3, prod_id[2]);
976 pcmcia_device_stringattr(prod_id4, prod_id[3]);
977
978
979 static ssize_t pcmcia_show_pm_state(struct device *dev, struct device_attribute *attr, char *buf)
980 {
981 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
982
983 if (p_dev->suspended)
984 return sprintf(buf, "off\n");
985 else
986 return sprintf(buf, "on\n");
987 }
988
989 static ssize_t pcmcia_store_pm_state(struct device *dev, struct device_attribute *attr,
990 const char *buf, size_t count)
991 {
992 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
993 int ret = 0;
994
995 if (!count)
996 return -EINVAL;
997
998 if ((!p_dev->suspended) && !strncmp(buf, "off", 3))
999 ret = dpm_runtime_suspend(dev, PMSG_SUSPEND);
1000 else if (p_dev->suspended && !strncmp(buf, "on", 2))
1001 dpm_runtime_resume(dev);
1002
1003 return ret ? ret : count;
1004 }
1005
1006
1007 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1008 {
1009 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1010 int i;
1011 u32 hash[4] = { 0, 0, 0, 0};
1012
1013 /* calculate hashes */
1014 for (i=0; i<4; i++) {
1015 if (!p_dev->prod_id[i])
1016 continue;
1017 hash[i] = crc32(0,p_dev->prod_id[i],strlen(p_dev->prod_id[i]));
1018 }
1019 return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
1020 "pa%08Xpb%08Xpc%08Xpd%08X\n",
1021 p_dev->has_manf_id ? p_dev->manf_id : 0,
1022 p_dev->has_card_id ? p_dev->card_id : 0,
1023 p_dev->has_func_id ? p_dev->func_id : 0,
1024 p_dev->func, p_dev->device_no,
1025 hash[0], hash[1], hash[2], hash[3]);
1026 }
1027
1028 static ssize_t pcmcia_store_allow_func_id_match(struct device *dev,
1029 struct device_attribute *attr, const char *buf, size_t count)
1030 {
1031 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1032 int ret;
1033
1034 if (!count)
1035 return -EINVAL;
1036
1037 mutex_lock(&p_dev->socket->skt_mutex);
1038 p_dev->allow_func_id_match = 1;
1039 mutex_unlock(&p_dev->socket->skt_mutex);
1040
1041 ret = bus_rescan_devices(&pcmcia_bus_type);
1042 if (ret)
1043 printk(KERN_INFO "pcmcia: bus_rescan_devices failed after "
1044 "allowing func_id matches\n");
1045
1046 return count;
1047 }
1048
1049 static struct device_attribute pcmcia_dev_attrs[] = {
1050 __ATTR(function, 0444, func_show, NULL),
1051 __ATTR(pm_state, 0644, pcmcia_show_pm_state, pcmcia_store_pm_state),
1052 __ATTR_RO(func_id),
1053 __ATTR_RO(manf_id),
1054 __ATTR_RO(card_id),
1055 __ATTR_RO(prod_id1),
1056 __ATTR_RO(prod_id2),
1057 __ATTR_RO(prod_id3),
1058 __ATTR_RO(prod_id4),
1059 __ATTR_RO(modalias),
1060 __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match),
1061 __ATTR_NULL,
1062 };
1063
1064 /* PM support, also needed for reset */
1065
1066 static int pcmcia_dev_suspend(struct device * dev, pm_message_t state)
1067 {
1068 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1069 struct pcmcia_driver *p_drv = NULL;
1070 int ret = 0;
1071
1072 if (dev->driver)
1073 p_drv = to_pcmcia_drv(dev->driver);
1074
1075 if (!p_drv)
1076 goto out;
1077
1078 if (p_drv->suspend) {
1079 ret = p_drv->suspend(p_dev);
1080 if (ret)
1081 goto out;
1082 }
1083
1084 if (p_dev->device_no == p_dev->func)
1085 pcmcia_release_configuration(p_dev);
1086
1087 out:
1088 if (!ret)
1089 p_dev->suspended = 1;
1090 return ret;
1091 }
1092
1093
1094 static int pcmcia_dev_resume(struct device * dev)
1095 {
1096 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1097 struct pcmcia_driver *p_drv = NULL;
1098 int ret = 0;
1099
1100 if (dev->driver)
1101 p_drv = to_pcmcia_drv(dev->driver);
1102
1103 if (!p_drv)
1104 goto out;
1105
1106 if (p_dev->device_no == p_dev->func) {
1107 ret = pcmcia_request_configuration(p_dev, &p_dev->conf);
1108 if (ret)
1109 goto out;
1110 }
1111
1112 if (p_drv->resume)
1113 ret = p_drv->resume(p_dev);
1114
1115 out:
1116 if (!ret)
1117 p_dev->suspended = 0;
1118 return ret;
1119 }
1120
1121
1122 static int pcmcia_bus_suspend_callback(struct device *dev, void * _data)
1123 {
1124 struct pcmcia_socket *skt = _data;
1125 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1126
1127 if (p_dev->socket != skt)
1128 return 0;
1129
1130 return dpm_runtime_suspend(dev, PMSG_SUSPEND);
1131 }
1132
1133 static int pcmcia_bus_resume_callback(struct device *dev, void * _data)
1134 {
1135 struct pcmcia_socket *skt = _data;
1136 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1137
1138 if (p_dev->socket != skt)
1139 return 0;
1140
1141 dpm_runtime_resume(dev);
1142
1143 return 0;
1144 }
1145
1146 static int pcmcia_bus_resume(struct pcmcia_socket *skt)
1147 {
1148 bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback);
1149 return 0;
1150 }
1151
1152 static int pcmcia_bus_suspend(struct pcmcia_socket *skt)
1153 {
1154 if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt,
1155 pcmcia_bus_suspend_callback)) {
1156 pcmcia_bus_resume(skt);
1157 return -EIO;
1158 }
1159 return 0;
1160 }
1161
1162
1163 /*======================================================================
1164
1165 The card status event handler.
1166
1167 ======================================================================*/
1168
1169 /* Normally, the event is passed to individual drivers after
1170 * informing userspace. Only for CS_EVENT_CARD_REMOVAL this
1171 * is inversed to maintain historic compatibility.
1172 */
1173
1174 static int ds_event(struct pcmcia_socket *skt, event_t event, int priority)
1175 {
1176 struct pcmcia_socket *s = pcmcia_get_socket(skt);
1177
1178 if (!s) {
1179 printk(KERN_ERR "PCMCIA obtaining reference to socket %p " \
1180 "failed, event 0x%x lost!\n", skt, event);
1181 return -ENODEV;
1182 }
1183
1184 ds_dbg(1, "ds_event(0x%06x, %d, 0x%p)\n",
1185 event, priority, skt);
1186
1187 switch (event) {
1188 case CS_EVENT_CARD_REMOVAL:
1189 s->pcmcia_state.present = 0;
1190 pcmcia_card_remove(skt, NULL);
1191 handle_event(skt, event);
1192 break;
1193
1194 case CS_EVENT_CARD_INSERTION:
1195 s->pcmcia_state.present = 1;
1196 pcmcia_card_add(skt);
1197 handle_event(skt, event);
1198 break;
1199
1200 case CS_EVENT_EJECTION_REQUEST:
1201 break;
1202
1203 case CS_EVENT_PM_SUSPEND:
1204 case CS_EVENT_PM_RESUME:
1205 case CS_EVENT_RESET_PHYSICAL:
1206 case CS_EVENT_CARD_RESET:
1207 default:
1208 handle_event(skt, event);
1209 break;
1210 }
1211
1212 pcmcia_put_socket(s);
1213
1214 return 0;
1215 } /* ds_event */
1216
1217
1218 struct pcmcia_device * pcmcia_dev_present(struct pcmcia_device *_p_dev)
1219 {
1220 struct pcmcia_device *p_dev;
1221 struct pcmcia_device *ret = NULL;
1222
1223 p_dev = pcmcia_get_dev(_p_dev);
1224 if (!p_dev)
1225 return NULL;
1226
1227 if (!p_dev->socket->pcmcia_state.present)
1228 goto out;
1229
1230 if (p_dev->_removed)
1231 goto out;
1232
1233 if (p_dev->suspended)
1234 goto out;
1235
1236 ret = p_dev;
1237 out:
1238 pcmcia_put_dev(p_dev);
1239 return ret;
1240 }
1241 EXPORT_SYMBOL(pcmcia_dev_present);
1242
1243
1244 static struct pcmcia_callback pcmcia_bus_callback = {
1245 .owner = THIS_MODULE,
1246 .event = ds_event,
1247 .requery = pcmcia_bus_rescan,
1248 .suspend = pcmcia_bus_suspend,
1249 .resume = pcmcia_bus_resume,
1250 };
1251
1252 static int __devinit pcmcia_bus_add_socket(struct class_device *class_dev,
1253 struct class_interface *class_intf)
1254 {
1255 struct pcmcia_socket *socket = class_get_devdata(class_dev);
1256 int ret;
1257
1258 socket = pcmcia_get_socket(socket);
1259 if (!socket) {
1260 printk(KERN_ERR "PCMCIA obtaining reference to socket %p failed\n", socket);
1261 return -ENODEV;
1262 }
1263
1264 /*
1265 * Ugly. But we want to wait for the socket threads to have started up.
1266 * We really should let the drivers themselves drive some of this..
1267 */
1268 msleep(250);
1269
1270 #ifdef CONFIG_PCMCIA_IOCTL
1271 init_waitqueue_head(&socket->queue);
1272 #endif
1273 INIT_LIST_HEAD(&socket->devices_list);
1274 INIT_WORK(&socket->device_add, pcmcia_delayed_add_device, socket);
1275 memset(&socket->pcmcia_state, 0, sizeof(u8));
1276 socket->device_count = 0;
1277
1278 ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback);
1279 if (ret) {
1280 printk(KERN_ERR "PCMCIA registration PCCard core failed for socket %p\n", socket);
1281 pcmcia_put_socket(socket);
1282 return (ret);
1283 }
1284
1285 return 0;
1286 }
1287
1288 static void pcmcia_bus_remove_socket(struct class_device *class_dev,
1289 struct class_interface *class_intf)
1290 {
1291 struct pcmcia_socket *socket = class_get_devdata(class_dev);
1292
1293 if (!socket)
1294 return;
1295
1296 socket->pcmcia_state.dead = 1;
1297 pccard_register_pcmcia(socket, NULL);
1298
1299 /* unregister any unbound devices */
1300 mutex_lock(&socket->skt_mutex);
1301 pcmcia_card_remove(socket, NULL);
1302 mutex_unlock(&socket->skt_mutex);
1303
1304 pcmcia_put_socket(socket);
1305
1306 return;
1307 }
1308
1309
1310 /* the pcmcia_bus_interface is used to handle pcmcia socket devices */
1311 static struct class_interface pcmcia_bus_interface = {
1312 .class = &pcmcia_socket_class,
1313 .add = &pcmcia_bus_add_socket,
1314 .remove = &pcmcia_bus_remove_socket,
1315 };
1316
1317
1318 struct bus_type pcmcia_bus_type = {
1319 .name = "pcmcia",
1320 .uevent = pcmcia_bus_uevent,
1321 .match = pcmcia_bus_match,
1322 .dev_attrs = pcmcia_dev_attrs,
1323 .probe = pcmcia_device_probe,
1324 .remove = pcmcia_device_remove,
1325 .suspend = pcmcia_dev_suspend,
1326 .resume = pcmcia_dev_resume,
1327 };
1328
1329
1330 static int __init init_pcmcia_bus(void)
1331 {
1332 int ret;
1333
1334 spin_lock_init(&pcmcia_dev_list_lock);
1335
1336 ret = bus_register(&pcmcia_bus_type);
1337 if (ret < 0) {
1338 printk(KERN_WARNING "pcmcia: bus_register error: %d\n", ret);
1339 return ret;
1340 }
1341 ret = class_interface_register(&pcmcia_bus_interface);
1342 if (ret < 0) {
1343 printk(KERN_WARNING
1344 "pcmcia: class_interface_register error: %d\n", ret);
1345 bus_unregister(&pcmcia_bus_type);
1346 return ret;
1347 }
1348
1349 pcmcia_setup_ioctl();
1350
1351 return 0;
1352 }
1353 fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that
1354 * pcmcia_socket_class is already registered */
1355
1356
1357 static void __exit exit_pcmcia_bus(void)
1358 {
1359 pcmcia_cleanup_ioctl();
1360
1361 class_interface_unregister(&pcmcia_bus_interface);
1362
1363 bus_unregister(&pcmcia_bus_type);
1364 }
1365 module_exit(exit_pcmcia_bus);
1366
1367
1368 MODULE_ALIAS("ds");
Linux kernel - Deliverables
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