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