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skge: turn carrier off when down
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / pcmcia / ds.c
blob7355eb455a881324f68a34dfd4cbe9f91acf619d
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 ds_dbg(3, "registering driver %s\n", driver->drv.name);
254
255 return driver_register(&driver->drv);
256 }
257 EXPORT_SYMBOL(pcmcia_register_driver);
258
259 /**
260 * pcmcia_unregister_driver - unregister a PCMCIA driver with the bus core
261 */
262 void pcmcia_unregister_driver(struct pcmcia_driver *driver)
263 {
264 ds_dbg(3, "unregistering driver %s\n", driver->drv.name);
265 driver_unregister(&driver->drv);
266 }
267 EXPORT_SYMBOL(pcmcia_unregister_driver);
268
269
270 /* pcmcia_device handling */
271
272 struct pcmcia_device * pcmcia_get_dev(struct pcmcia_device *p_dev)
273 {
274 struct device *tmp_dev;
275 tmp_dev = get_device(&p_dev->dev);
276 if (!tmp_dev)
277 return NULL;
278 return to_pcmcia_dev(tmp_dev);
279 }
280
281 void pcmcia_put_dev(struct pcmcia_device *p_dev)
282 {
283 if (p_dev)
284 put_device(&p_dev->dev);
285 }
286
287 static void pcmcia_release_function(struct kref *ref)
288 {
289 struct config_t *c = container_of(ref, struct config_t, ref);
290 ds_dbg(1, "releasing config_t\n");
291 kfree(c);
292 }
293
294 static void pcmcia_release_dev(struct device *dev)
295 {
296 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
297 ds_dbg(1, "releasing device %s\n", p_dev->dev.bus_id);
298 pcmcia_put_socket(p_dev->socket);
299 kfree(p_dev->devname);
300 kref_put(&p_dev->function_config->ref, pcmcia_release_function);
301 kfree(p_dev);
302 }
303
304 static void pcmcia_add_device_later(struct pcmcia_socket *s, int mfc)
305 {
306 if (!s->pcmcia_state.device_add_pending) {
307 ds_dbg(1, "scheduling to add %s secondary"
308 " device to %d\n", mfc ? "mfc" : "pfc", s->sock);
309 s->pcmcia_state.device_add_pending = 1;
310 s->pcmcia_state.mfc_pfc = mfc;
311 schedule_work(&s->device_add);
312 }
313 return;
314 }
315
316 static int pcmcia_device_probe(struct device * dev)
317 {
318 struct pcmcia_device *p_dev;
319 struct pcmcia_driver *p_drv;
320 struct pcmcia_device_id *did;
321 struct pcmcia_socket *s;
322 cistpl_config_t cis_config;
323 int ret = 0;
324
325 dev = get_device(dev);
326 if (!dev)
327 return -ENODEV;
328
329 p_dev = to_pcmcia_dev(dev);
330 p_drv = to_pcmcia_drv(dev->driver);
331 s = p_dev->socket;
332
333 ds_dbg(1, "trying to bind %s to %s\n", p_dev->dev.bus_id,
334 p_drv->drv.name);
335
336 if ((!p_drv->probe) || (!p_dev->function_config) ||
337 (!try_module_get(p_drv->owner))) {
338 ret = -EINVAL;
339 goto put_dev;
340 }
341
342 /* set up some more device information */
343 ret = pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_CONFIG,
344 &cis_config);
345 if (!ret) {
346 p_dev->conf.ConfigBase = cis_config.base;
347 p_dev->conf.Present = cis_config.rmask[0];
348 } else {
349 printk(KERN_INFO "pcmcia: could not parse base and rmask0 of CIS\n");
350 p_dev->conf.ConfigBase = 0;
351 p_dev->conf.Present = 0;
352 }
353
354 ret = p_drv->probe(p_dev);
355 if (ret) {
356 ds_dbg(1, "binding %s to %s failed with %d\n",
357 p_dev->dev.bus_id, p_drv->drv.name, ret);
358 goto put_module;
359 }
360
361 /* handle pseudo multifunction devices:
362 * there are at most two pseudo multifunction devices.
363 * if we're matching against the first, schedule a
364 * call which will then check whether there are two
365 * pseudo devices, and if not, add the second one.
366 */
367 did = p_dev->dev.driver_data;
368 if (did && (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) &&
369 (p_dev->socket->device_count == 1) && (p_dev->device_no == 0))
370 pcmcia_add_device_later(p_dev->socket, 0);
371
372 put_module:
373 if (ret)
374 module_put(p_drv->owner);
375 put_dev:
376 if (ret)
377 put_device(dev);
378 return (ret);
379 }
380
381
382 /*
383 * Removes a PCMCIA card from the device tree and socket list.
384 */
385 static void pcmcia_card_remove(struct pcmcia_socket *s, struct pcmcia_device *leftover)
386 {
387 struct pcmcia_device *p_dev;
388 struct pcmcia_device *tmp;
389 unsigned long flags;
390
391 ds_dbg(2, "pcmcia_card_remove(%d) %s\n", s->sock,
392 leftover ? leftover->devname : "");
393
394 if (!leftover)
395 s->device_count = 0;
396 else
397 s->device_count = 1;
398
399 /* unregister all pcmcia_devices registered with this socket, except leftover */
400 list_for_each_entry_safe(p_dev, tmp, &s->devices_list, socket_device_list) {
401 if (p_dev == leftover)
402 continue;
403
404 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
405 list_del(&p_dev->socket_device_list);
406 p_dev->_removed=1;
407 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
408
409 ds_dbg(2, "unregistering device %s\n", p_dev->dev.bus_id);
410 device_unregister(&p_dev->dev);
411 }
412
413 return;
414 }
415
416 static int pcmcia_device_remove(struct device * dev)
417 {
418 struct pcmcia_device *p_dev;
419 struct pcmcia_driver *p_drv;
420 struct pcmcia_device_id *did;
421 int i;
422
423 p_dev = to_pcmcia_dev(dev);
424 p_drv = to_pcmcia_drv(dev->driver);
425
426 ds_dbg(1, "removing device %s\n", p_dev->dev.bus_id);
427
428 /* If we're removing the primary module driving a
429 * pseudo multi-function card, we need to unbind
430 * all devices
431 */
432 did = p_dev->dev.driver_data;
433 if (did && (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) &&
434 (p_dev->socket->device_count != 0) &&
435 (p_dev->device_no == 0))
436 pcmcia_card_remove(p_dev->socket, p_dev);
437
438 /* detach the "instance" */
439 if (!p_drv)
440 return 0;
441
442 if (p_drv->remove)
443 p_drv->remove(p_dev);
444
445 p_dev->dev_node = NULL;
446
447 /* check for proper unloading */
448 if (p_dev->_irq || p_dev->_io || p_dev->_locked)
449 printk(KERN_INFO "pcmcia: driver %s did not release config properly\n",
450 p_drv->drv.name);
451
452 for (i = 0; i < MAX_WIN; i++)
453 if (p_dev->_win & CLIENT_WIN_REQ(i))
454 printk(KERN_INFO "pcmcia: driver %s did not release windows properly\n",
455 p_drv->drv.name);
456
457 /* references from pcmcia_probe_device */
458 pcmcia_put_dev(p_dev);
459 module_put(p_drv->owner);
460
461 return 0;
462 }
463
464
465 /*
466 * pcmcia_device_query -- determine information about a pcmcia device
467 */
468 static int pcmcia_device_query(struct pcmcia_device *p_dev)
469 {
470 cistpl_manfid_t manf_id;
471 cistpl_funcid_t func_id;
472 cistpl_vers_1_t *vers1;
473 unsigned int i;
474
475 vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL);
476 if (!vers1)
477 return -ENOMEM;
478
479 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
480 CISTPL_MANFID, &manf_id)) {
481 p_dev->manf_id = manf_id.manf;
482 p_dev->card_id = manf_id.card;
483 p_dev->has_manf_id = 1;
484 p_dev->has_card_id = 1;
485 }
486
487 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
488 CISTPL_FUNCID, &func_id)) {
489 p_dev->func_id = func_id.func;
490 p_dev->has_func_id = 1;
491 } else {
492 /* rule of thumb: cards with no FUNCID, but with
493 * common memory device geometry information, are
494 * probably memory cards (from pcmcia-cs) */
495 cistpl_device_geo_t *devgeo;
496
497 devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL);
498 if (!devgeo) {
499 kfree(vers1);
500 return -ENOMEM;
501 }
502 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
503 CISTPL_DEVICE_GEO, devgeo)) {
504 ds_dbg(0, "mem device geometry probably means "
505 "FUNCID_MEMORY\n");
506 p_dev->func_id = CISTPL_FUNCID_MEMORY;
507 p_dev->has_func_id = 1;
508 }
509 kfree(devgeo);
510 }
511
512 if (!pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_VERS_1,
513 vers1)) {
514 for (i=0; i < vers1->ns; i++) {
515 char *tmp;
516 unsigned int length;
517
518 tmp = vers1->str + vers1->ofs[i];
519
520 length = strlen(tmp) + 1;
521 if ((length < 2) || (length > 255))
522 continue;
523
524 p_dev->prod_id[i] = kmalloc(sizeof(char) * length,
525 GFP_KERNEL);
526 if (!p_dev->prod_id[i])
527 continue;
528
529 p_dev->prod_id[i] = strncpy(p_dev->prod_id[i],
530 tmp, length);
531 }
532 }
533
534 kfree(vers1);
535 return 0;
536 }
537
538
539 /* device_add_lock is needed to avoid double registration by cardmgr and kernel.
540 * Serializes pcmcia_device_add; will most likely be removed in future.
541 *
542 * While it has the caveat that adding new PCMCIA devices inside(!) device_register()
543 * won't work, this doesn't matter much at the moment: the driver core doesn't
544 * support it either.
545 */
546 static DEFINE_MUTEX(device_add_lock);
547
548 struct pcmcia_device * pcmcia_device_add(struct pcmcia_socket *s, unsigned int function)
549 {
550 struct pcmcia_device *p_dev, *tmp_dev;
551 unsigned long flags;
552 int bus_id_len;
553
554 s = pcmcia_get_socket(s);
555 if (!s)
556 return NULL;
557
558 mutex_lock(&device_add_lock);
559
560 ds_dbg(3, "adding device to %d, function %d\n", s->sock, function);
561
562 /* max of 4 devices per card */
563 if (s->device_count == 4)
564 goto err_put;
565
566 p_dev = kzalloc(sizeof(struct pcmcia_device), GFP_KERNEL);
567 if (!p_dev)
568 goto err_put;
569
570 p_dev->socket = s;
571 p_dev->device_no = (s->device_count++);
572 p_dev->func = function;
573
574 p_dev->dev.bus = &pcmcia_bus_type;
575 p_dev->dev.parent = s->dev.dev;
576 p_dev->dev.release = pcmcia_release_dev;
577 bus_id_len = sprintf (p_dev->dev.bus_id, "%d.%d", p_dev->socket->sock, p_dev->device_no);
578
579 p_dev->devname = kmalloc(6 + bus_id_len + 1, GFP_KERNEL);
580 if (!p_dev->devname)
581 goto err_free;
582 sprintf (p_dev->devname, "pcmcia%s", p_dev->dev.bus_id);
583 ds_dbg(3, "devname is %s\n", p_dev->devname);
584
585 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
586
587 /*
588 * p_dev->function_config must be the same for all card functions.
589 * Note that this is serialized by the device_add_lock, so that
590 * only one such struct will be created.
591 */
592 list_for_each_entry(tmp_dev, &s->devices_list, socket_device_list)
593 if (p_dev->func == tmp_dev->func) {
594 p_dev->function_config = tmp_dev->function_config;
595 kref_get(&p_dev->function_config->ref);
596 }
597
598 /* Add to the list in pcmcia_bus_socket */
599 list_add(&p_dev->socket_device_list, &s->devices_list);
600
601 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
602
603 if (!p_dev->function_config) {
604 ds_dbg(3, "creating config_t for %s\n", p_dev->dev.bus_id);
605 p_dev->function_config = kzalloc(sizeof(struct config_t),
606 GFP_KERNEL);
607 if (!p_dev->function_config)
608 goto err_unreg;
609 kref_init(&p_dev->function_config->ref);
610 }
611
612 printk(KERN_NOTICE "pcmcia: registering new device %s\n",
613 p_dev->devname);
614
615 pcmcia_device_query(p_dev);
616
617 if (device_register(&p_dev->dev))
618 goto err_unreg;
619
620 mutex_unlock(&device_add_lock);
621
622 return p_dev;
623
624 err_unreg:
625 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
626 list_del(&p_dev->socket_device_list);
627 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
628
629 err_free:
630 kfree(p_dev->devname);
631 kfree(p_dev);
632 s->device_count--;
633 err_put:
634 mutex_unlock(&device_add_lock);
635 pcmcia_put_socket(s);
636
637 return NULL;
638 }
639
640
641 static int pcmcia_card_add(struct pcmcia_socket *s)
642 {
643 cisinfo_t cisinfo;
644 cistpl_longlink_mfc_t mfc;
645 unsigned int no_funcs, i;
646 int ret = 0;
647
648 if (!(s->resource_setup_done)) {
649 ds_dbg(3, "no resources available, delaying card_add\n");
650 return -EAGAIN; /* try again, but later... */
651 }
652
653 if (pcmcia_validate_mem(s)) {
654 ds_dbg(3, "validating mem resources failed, "
655 "delaying card_add\n");
656 return -EAGAIN; /* try again, but later... */
657 }
658
659 ret = pccard_validate_cis(s, BIND_FN_ALL, &cisinfo);
660 if (ret || !cisinfo.Chains) {
661 ds_dbg(0, "invalid CIS or invalid resources\n");
662 return -ENODEV;
663 }
664
665 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
666 no_funcs = mfc.nfn;
667 else
668 no_funcs = 1;
669 s->functions = no_funcs;
670
671 for (i=0; i < no_funcs; i++)
672 pcmcia_device_add(s, i);
673
674 return (ret);
675 }
676
677
678 static void pcmcia_delayed_add_device(struct work_struct *work)
679 {
680 struct pcmcia_socket *s =
681 container_of(work, struct pcmcia_socket, device_add);
682 ds_dbg(1, "adding additional device to %d\n", s->sock);
683 pcmcia_device_add(s, s->pcmcia_state.mfc_pfc);
684 s->pcmcia_state.device_add_pending = 0;
685 s->pcmcia_state.mfc_pfc = 0;
686 }
687
688 static int pcmcia_requery(struct device *dev, void * _data)
689 {
690 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
691 if (!p_dev->dev.driver) {
692 ds_dbg(1, "update device information for %s\n",
693 p_dev->dev.bus_id);
694 pcmcia_device_query(p_dev);
695 }
696
697 return 0;
698 }
699
700 static void pcmcia_bus_rescan(struct pcmcia_socket *skt, int new_cis)
701 {
702 int no_devices = 0;
703 int ret = 0;
704 unsigned long flags;
705
706 /* must be called with skt_mutex held */
707 ds_dbg(0, "re-scanning socket %d\n", skt->sock);
708
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 this is because of a CIS override, start over */
715 if (new_cis && !no_devices)
716 pcmcia_card_remove(skt, NULL);
717
718 /* if no devices were added for this socket yet because of
719 * missing resource information or other trouble, we need to
720 * do this now. */
721 if (no_devices || new_cis) {
722 ret = pcmcia_card_add(skt);
723 if (ret)
724 return;
725 }
726
727 /* some device information might have changed because of a CIS
728 * update or because we can finally read it correctly... so
729 * determine it again, overwriting old values if necessary. */
730 bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery);
731
732 /* we re-scan all devices, not just the ones connected to this
733 * socket. This does not matter, though. */
734 ret = bus_rescan_devices(&pcmcia_bus_type);
735 if (ret)
736 printk(KERN_INFO "pcmcia: bus_rescan_devices failed\n");
737 }
738
739 #ifdef CONFIG_PCMCIA_LOAD_CIS
740
741 /**
742 * pcmcia_load_firmware - load CIS from userspace if device-provided is broken
743 * @dev - the pcmcia device which needs a CIS override
744 * @filename - requested filename in /lib/firmware/
745 *
746 * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if
747 * the one provided by the card is broken. The firmware files reside in
748 * /lib/firmware/ in userspace.
749 */
750 static int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
751 {
752 struct pcmcia_socket *s = dev->socket;
753 const struct firmware *fw;
754 char path[20];
755 int ret = -ENOMEM;
756 int no_funcs;
757 int old_funcs;
758 cisdump_t *cis;
759 cistpl_longlink_mfc_t mfc;
760
761 if (!filename)
762 return -EINVAL;
763
764 ds_dbg(1, "trying to load CIS file %s\n", filename);
765
766 if (strlen(filename) > 14) {
767 printk(KERN_WARNING "pcmcia: CIS filename is too long\n");
768 return -EINVAL;
769 }
770
771 snprintf(path, 20, "%s", filename);
772
773 if (request_firmware(&fw, path, &dev->dev) == 0) {
774 if (fw->size >= CISTPL_MAX_CIS_SIZE) {
775 ret = -EINVAL;
776 printk(KERN_ERR "pcmcia: CIS override is too big\n");
777 goto release;
778 }
779
780 cis = kzalloc(sizeof(cisdump_t), GFP_KERNEL);
781 if (!cis) {
782 ret = -ENOMEM;
783 goto release;
784 }
785
786 cis->Length = fw->size + 1;
787 memcpy(cis->Data, fw->data, fw->size);
788
789 if (!pcmcia_replace_cis(s, cis))
790 ret = 0;
791 else {
792 printk(KERN_ERR "pcmcia: CIS override failed\n");
793 goto release;
794 }
795
796
797 /* update information */
798 pcmcia_device_query(dev);
799
800 /* does this cis override add or remove functions? */
801 old_funcs = s->functions;
802
803 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
804 no_funcs = mfc.nfn;
805 else
806 no_funcs = 1;
807 s->functions = no_funcs;
808
809 if (old_funcs > no_funcs)
810 pcmcia_card_remove(s, dev);
811 else if (no_funcs > old_funcs)
812 pcmcia_add_device_later(s, 1);
813 }
814 release:
815 release_firmware(fw);
816
817 return (ret);
818 }
819
820 #else /* !CONFIG_PCMCIA_LOAD_CIS */
821
822 static inline int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
823 {
824 return -ENODEV;
825 }
826
827 #endif
828
829
830 static inline int pcmcia_devmatch(struct pcmcia_device *dev,
831 struct pcmcia_device_id *did)
832 {
833 if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
834 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
835 return 0;
836 }
837
838 if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
839 if ((!dev->has_card_id) || (dev->card_id != did->card_id))
840 return 0;
841 }
842
843 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
844 if (dev->func != did->function)
845 return 0;
846 }
847
848 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
849 if (!dev->prod_id[0])
850 return 0;
851 if (strcmp(did->prod_id[0], dev->prod_id[0]))
852 return 0;
853 }
854
855 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
856 if (!dev->prod_id[1])
857 return 0;
858 if (strcmp(did->prod_id[1], dev->prod_id[1]))
859 return 0;
860 }
861
862 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
863 if (!dev->prod_id[2])
864 return 0;
865 if (strcmp(did->prod_id[2], dev->prod_id[2]))
866 return 0;
867 }
868
869 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
870 if (!dev->prod_id[3])
871 return 0;
872 if (strcmp(did->prod_id[3], dev->prod_id[3]))
873 return 0;
874 }
875
876 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
877 if (dev->device_no != did->device_no)
878 return 0;
879 }
880
881 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
882 if ((!dev->has_func_id) || (dev->func_id != did->func_id))
883 return 0;
884
885 /* if this is a pseudo-multi-function device,
886 * we need explicit matches */
887 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO)
888 return 0;
889 if (dev->device_no)
890 return 0;
891
892 /* also, FUNC_ID matching needs to be activated by userspace
893 * after it has re-checked that there is no possible module
894 * with a prod_id/manf_id/card_id match.
895 */
896 ds_dbg(0, "skipping FUNC_ID match for %s until userspace "
897 "interaction\n", dev->dev.bus_id);
898 if (!dev->allow_func_id_match)
899 return 0;
900 }
901
902 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
903 ds_dbg(0, "device %s needs a fake CIS\n", dev->dev.bus_id);
904 if (!dev->socket->fake_cis)
905 pcmcia_load_firmware(dev, did->cisfile);
906
907 if (!dev->socket->fake_cis)
908 return 0;
909 }
910
911 if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
912 int i;
913 for (i=0; i<4; i++)
914 if (dev->prod_id[i])
915 return 0;
916 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
917 return 0;
918 }
919
920 dev->dev.driver_data = (void *) did;
921
922 return 1;
923 }
924
925
926 static int pcmcia_bus_match(struct device * dev, struct device_driver * drv) {
927 struct pcmcia_device * p_dev = to_pcmcia_dev(dev);
928 struct pcmcia_driver * p_drv = to_pcmcia_drv(drv);
929 struct pcmcia_device_id *did = p_drv->id_table;
930
931 #ifdef CONFIG_PCMCIA_IOCTL
932 /* matching by cardmgr */
933 if (p_dev->cardmgr == p_drv) {
934 ds_dbg(0, "cardmgr matched %s to %s\n", dev->bus_id,
935 drv->name);
936 return 1;
937 }
938 #endif
939
940 while (did && did->match_flags) {
941 ds_dbg(3, "trying to match %s to %s\n", dev->bus_id,
942 drv->name);
943 if (pcmcia_devmatch(p_dev, did)) {
944 ds_dbg(0, "matched %s to %s\n", dev->bus_id,
945 drv->name);
946 return 1;
947 }
948 did++;
949 }
950
951 return 0;
952 }
953
954 #ifdef CONFIG_HOTPLUG
955
956 static int pcmcia_bus_uevent(struct device *dev, char **envp, int num_envp,
957 char *buffer, int buffer_size)
958 {
959 struct pcmcia_device *p_dev;
960 int i, length = 0;
961 u32 hash[4] = { 0, 0, 0, 0};
962
963 if (!dev)
964 return -ENODEV;
965
966 p_dev = to_pcmcia_dev(dev);
967
968 /* calculate hashes */
969 for (i=0; i<4; i++) {
970 if (!p_dev->prod_id[i])
971 continue;
972 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
973 }
974
975 i = 0;
976
977 if (add_uevent_var(envp, num_envp, &i,
978 buffer, buffer_size, &length,
979 "SOCKET_NO=%u",
980 p_dev->socket->sock))
981 return -ENOMEM;
982
983 if (add_uevent_var(envp, num_envp, &i,
984 buffer, buffer_size, &length,
985 "DEVICE_NO=%02X",
986 p_dev->device_no))
987 return -ENOMEM;
988
989 if (add_uevent_var(envp, num_envp, &i,
990 buffer, buffer_size, &length,
991 "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
992 "pa%08Xpb%08Xpc%08Xpd%08X",
993 p_dev->has_manf_id ? p_dev->manf_id : 0,
994 p_dev->has_card_id ? p_dev->card_id : 0,
995 p_dev->has_func_id ? p_dev->func_id : 0,
996 p_dev->func,
997 p_dev->device_no,
998 hash[0],
999 hash[1],
1000 hash[2],
1001 hash[3]))
1002 return -ENOMEM;
1003
1004 envp[i] = NULL;
1005
1006 return 0;
1007 }
1008
1009 #else
1010
1011 static int pcmcia_bus_uevent(struct device *dev, char **envp, int num_envp,
1012 char *buffer, int buffer_size)
1013 {
1014 return -ENODEV;
1015 }
1016
1017 #endif
1018
1019 /************************ per-device sysfs output ***************************/
1020
1021 #define pcmcia_device_attr(field, test, format) \
1022 static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf) \
1023 { \
1024 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
1025 return p_dev->test ? sprintf (buf, format, p_dev->field) : -ENODEV; \
1026 }
1027
1028 #define pcmcia_device_stringattr(name, field) \
1029 static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf) \
1030 { \
1031 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
1032 return p_dev->field ? sprintf (buf, "%s\n", p_dev->field) : -ENODEV; \
1033 }
1034
1035 pcmcia_device_attr(func, socket, "0x%02x\n");
1036 pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
1037 pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
1038 pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
1039 pcmcia_device_stringattr(prod_id1, prod_id[0]);
1040 pcmcia_device_stringattr(prod_id2, prod_id[1]);
1041 pcmcia_device_stringattr(prod_id3, prod_id[2]);
1042 pcmcia_device_stringattr(prod_id4, prod_id[3]);
1043
1044
1045 static ssize_t pcmcia_show_pm_state(struct device *dev, struct device_attribute *attr, char *buf)
1046 {
1047 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1048
1049 if (p_dev->suspended)
1050 return sprintf(buf, "off\n");
1051 else
1052 return sprintf(buf, "on\n");
1053 }
1054
1055 static ssize_t pcmcia_store_pm_state(struct device *dev, struct device_attribute *attr,
1056 const char *buf, size_t count)
1057 {
1058 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1059 int ret = 0;
1060
1061 if (!count)
1062 return -EINVAL;
1063
1064 if ((!p_dev->suspended) && !strncmp(buf, "off", 3))
1065 ret = dpm_runtime_suspend(dev, PMSG_SUSPEND);
1066 else if (p_dev->suspended && !strncmp(buf, "on", 2))
1067 dpm_runtime_resume(dev);
1068
1069 return ret ? ret : count;
1070 }
1071
1072
1073 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1074 {
1075 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1076 int i;
1077 u32 hash[4] = { 0, 0, 0, 0};
1078
1079 /* calculate hashes */
1080 for (i=0; i<4; i++) {
1081 if (!p_dev->prod_id[i])
1082 continue;
1083 hash[i] = crc32(0,p_dev->prod_id[i],strlen(p_dev->prod_id[i]));
1084 }
1085 return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
1086 "pa%08Xpb%08Xpc%08Xpd%08X\n",
1087 p_dev->has_manf_id ? p_dev->manf_id : 0,
1088 p_dev->has_card_id ? p_dev->card_id : 0,
1089 p_dev->has_func_id ? p_dev->func_id : 0,
1090 p_dev->func, p_dev->device_no,
1091 hash[0], hash[1], hash[2], hash[3]);
1092 }
1093
1094 static ssize_t pcmcia_store_allow_func_id_match(struct device *dev,
1095 struct device_attribute *attr, const char *buf, size_t count)
1096 {
1097 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1098 int ret;
1099
1100 if (!count)
1101 return -EINVAL;
1102
1103 mutex_lock(&p_dev->socket->skt_mutex);
1104 p_dev->allow_func_id_match = 1;
1105 mutex_unlock(&p_dev->socket->skt_mutex);
1106
1107 ret = bus_rescan_devices(&pcmcia_bus_type);
1108 if (ret)
1109 printk(KERN_INFO "pcmcia: bus_rescan_devices failed after "
1110 "allowing func_id matches\n");
1111
1112 return count;
1113 }
1114
1115 static struct device_attribute pcmcia_dev_attrs[] = {
1116 __ATTR(function, 0444, func_show, NULL),
1117 __ATTR(pm_state, 0644, pcmcia_show_pm_state, pcmcia_store_pm_state),
1118 __ATTR_RO(func_id),
1119 __ATTR_RO(manf_id),
1120 __ATTR_RO(card_id),
1121 __ATTR_RO(prod_id1),
1122 __ATTR_RO(prod_id2),
1123 __ATTR_RO(prod_id3),
1124 __ATTR_RO(prod_id4),
1125 __ATTR_RO(modalias),
1126 __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match),
1127 __ATTR_NULL,
1128 };
1129
1130 /* PM support, also needed for reset */
1131
1132 static int pcmcia_dev_suspend(struct device * dev, pm_message_t state)
1133 {
1134 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1135 struct pcmcia_driver *p_drv = NULL;
1136 int ret = 0;
1137
1138 ds_dbg(2, "suspending %s\n", dev->bus_id);
1139
1140 if (dev->driver)
1141 p_drv = to_pcmcia_drv(dev->driver);
1142
1143 if (!p_drv)
1144 goto out;
1145
1146 if (p_drv->suspend) {
1147 ret = p_drv->suspend(p_dev);
1148 if (ret) {
1149 printk(KERN_ERR "pcmcia: device %s (driver %s) did "
1150 "not want to go to sleep (%d)\n",
1151 p_dev->devname, p_drv->drv.name, ret);
1152 goto out;
1153 }
1154 }
1155
1156 if (p_dev->device_no == p_dev->func) {
1157 ds_dbg(2, "releasing configuration for %s\n", dev->bus_id);
1158 pcmcia_release_configuration(p_dev);
1159 }
1160
1161 out:
1162 if (!ret)
1163 p_dev->suspended = 1;
1164 return ret;
1165 }
1166
1167
1168 static int pcmcia_dev_resume(struct device * dev)
1169 {
1170 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1171 struct pcmcia_driver *p_drv = NULL;
1172 int ret = 0;
1173
1174 ds_dbg(2, "resuming %s\n", dev->bus_id);
1175
1176 if (dev->driver)
1177 p_drv = to_pcmcia_drv(dev->driver);
1178
1179 if (!p_drv)
1180 goto out;
1181
1182 if (p_dev->device_no == p_dev->func) {
1183 ds_dbg(2, "requesting configuration for %s\n", dev->bus_id);
1184 ret = pcmcia_request_configuration(p_dev, &p_dev->conf);
1185 if (ret)
1186 goto out;
1187 }
1188
1189 if (p_drv->resume)
1190 ret = p_drv->resume(p_dev);
1191
1192 out:
1193 if (!ret)
1194 p_dev->suspended = 0;
1195 return ret;
1196 }
1197
1198
1199 static int pcmcia_bus_suspend_callback(struct device *dev, void * _data)
1200 {
1201 struct pcmcia_socket *skt = _data;
1202 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1203
1204 if (p_dev->socket != skt)
1205 return 0;
1206
1207 return dpm_runtime_suspend(dev, PMSG_SUSPEND);
1208 }
1209
1210 static int pcmcia_bus_resume_callback(struct device *dev, void * _data)
1211 {
1212 struct pcmcia_socket *skt = _data;
1213 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1214
1215 if (p_dev->socket != skt)
1216 return 0;
1217
1218 dpm_runtime_resume(dev);
1219
1220 return 0;
1221 }
1222
1223 static int pcmcia_bus_resume(struct pcmcia_socket *skt)
1224 {
1225 ds_dbg(2, "resuming socket %d\n", skt->sock);
1226 bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback);
1227 return 0;
1228 }
1229
1230 static int pcmcia_bus_suspend(struct pcmcia_socket *skt)
1231 {
1232 ds_dbg(2, "suspending socket %d\n", skt->sock);
1233 if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt,
1234 pcmcia_bus_suspend_callback)) {
1235 pcmcia_bus_resume(skt);
1236 return -EIO;
1237 }
1238 return 0;
1239 }
1240
1241
1242 /*======================================================================
1243
1244 The card status event handler.
1245
1246 ======================================================================*/
1247
1248 /* Normally, the event is passed to individual drivers after
1249 * informing userspace. Only for CS_EVENT_CARD_REMOVAL this
1250 * is inversed to maintain historic compatibility.
1251 */
1252
1253 static int ds_event(struct pcmcia_socket *skt, event_t event, int priority)
1254 {
1255 struct pcmcia_socket *s = pcmcia_get_socket(skt);
1256
1257 if (!s) {
1258 printk(KERN_ERR "PCMCIA obtaining reference to socket %p " \
1259 "failed, event 0x%x lost!\n", skt, event);
1260 return -ENODEV;
1261 }
1262
1263 ds_dbg(1, "ds_event(0x%06x, %d, 0x%p)\n",
1264 event, priority, skt);
1265
1266 switch (event) {
1267 case CS_EVENT_CARD_REMOVAL:
1268 s->pcmcia_state.present = 0;
1269 pcmcia_card_remove(skt, NULL);
1270 handle_event(skt, event);
1271 break;
1272
1273 case CS_EVENT_CARD_INSERTION:
1274 s->pcmcia_state.present = 1;
1275 pcmcia_card_add(skt);
1276 handle_event(skt, event);
1277 break;
1278
1279 case CS_EVENT_EJECTION_REQUEST:
1280 break;
1281
1282 case CS_EVENT_PM_SUSPEND:
1283 case CS_EVENT_PM_RESUME:
1284 case CS_EVENT_RESET_PHYSICAL:
1285 case CS_EVENT_CARD_RESET:
1286 default:
1287 handle_event(skt, event);
1288 break;
1289 }
1290
1291 pcmcia_put_socket(s);
1292
1293 return 0;
1294 } /* ds_event */
1295
1296
1297 struct pcmcia_device * pcmcia_dev_present(struct pcmcia_device *_p_dev)
1298 {
1299 struct pcmcia_device *p_dev;
1300 struct pcmcia_device *ret = NULL;
1301
1302 p_dev = pcmcia_get_dev(_p_dev);
1303 if (!p_dev)
1304 return NULL;
1305
1306 if (!p_dev->socket->pcmcia_state.present)
1307 goto out;
1308
1309 if (p_dev->_removed)
1310 goto out;
1311
1312 if (p_dev->suspended)
1313 goto out;
1314
1315 ret = p_dev;
1316 out:
1317 pcmcia_put_dev(p_dev);
1318 return ret;
1319 }
1320 EXPORT_SYMBOL(pcmcia_dev_present);
1321
1322
1323 static struct pcmcia_callback pcmcia_bus_callback = {
1324 .owner = THIS_MODULE,
1325 .event = ds_event,
1326 .requery = pcmcia_bus_rescan,
1327 .suspend = pcmcia_bus_suspend,
1328 .resume = pcmcia_bus_resume,
1329 };
1330
1331 static int __devinit pcmcia_bus_add_socket(struct class_device *class_dev,
1332 struct class_interface *class_intf)
1333 {
1334 struct pcmcia_socket *socket = class_get_devdata(class_dev);
1335 int ret;
1336
1337 socket = pcmcia_get_socket(socket);
1338 if (!socket) {
1339 printk(KERN_ERR "PCMCIA obtaining reference to socket %p failed\n", socket);
1340 return -ENODEV;
1341 }
1342
1343 /*
1344 * Ugly. But we want to wait for the socket threads to have started up.
1345 * We really should let the drivers themselves drive some of this..
1346 */
1347 msleep(250);
1348
1349 #ifdef CONFIG_PCMCIA_IOCTL
1350 init_waitqueue_head(&socket->queue);
1351 #endif
1352 INIT_LIST_HEAD(&socket->devices_list);
1353 INIT_WORK(&socket->device_add, pcmcia_delayed_add_device);
1354 memset(&socket->pcmcia_state, 0, sizeof(u8));
1355 socket->device_count = 0;
1356
1357 ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback);
1358 if (ret) {
1359 printk(KERN_ERR "PCMCIA registration PCCard core failed for socket %p\n", socket);
1360 pcmcia_put_socket(socket);
1361 return (ret);
1362 }
1363
1364 return 0;
1365 }
1366
1367 static void pcmcia_bus_remove_socket(struct class_device *class_dev,
1368 struct class_interface *class_intf)
1369 {
1370 struct pcmcia_socket *socket = class_get_devdata(class_dev);
1371
1372 if (!socket)
1373 return;
1374
1375 socket->pcmcia_state.dead = 1;
1376 pccard_register_pcmcia(socket, NULL);
1377
1378 /* unregister any unbound devices */
1379 mutex_lock(&socket->skt_mutex);
1380 pcmcia_card_remove(socket, NULL);
1381 mutex_unlock(&socket->skt_mutex);
1382
1383 pcmcia_put_socket(socket);
1384
1385 return;
1386 }
1387
1388
1389 /* the pcmcia_bus_interface is used to handle pcmcia socket devices */
1390 static struct class_interface pcmcia_bus_interface = {
1391 .class = &pcmcia_socket_class,
1392 .add = &pcmcia_bus_add_socket,
1393 .remove = &pcmcia_bus_remove_socket,
1394 };
1395
1396
1397 struct bus_type pcmcia_bus_type = {
1398 .name = "pcmcia",
1399 .uevent = pcmcia_bus_uevent,
1400 .match = pcmcia_bus_match,
1401 .dev_attrs = pcmcia_dev_attrs,
1402 .probe = pcmcia_device_probe,
1403 .remove = pcmcia_device_remove,
1404 .suspend = pcmcia_dev_suspend,
1405 .resume = pcmcia_dev_resume,
1406 };
1407
1408
1409 static int __init init_pcmcia_bus(void)
1410 {
1411 int ret;
1412
1413 spin_lock_init(&pcmcia_dev_list_lock);
1414
1415 ret = bus_register(&pcmcia_bus_type);
1416 if (ret < 0) {
1417 printk(KERN_WARNING "pcmcia: bus_register error: %d\n", ret);
1418 return ret;
1419 }
1420 ret = class_interface_register(&pcmcia_bus_interface);
1421 if (ret < 0) {
1422 printk(KERN_WARNING
1423 "pcmcia: class_interface_register error: %d\n", ret);
1424 bus_unregister(&pcmcia_bus_type);
1425 return ret;
1426 }
1427
1428 pcmcia_setup_ioctl();
1429
1430 return 0;
1431 }
1432 fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that
1433 * pcmcia_socket_class is already registered */
1434
1435
1436 static void __exit exit_pcmcia_bus(void)
1437 {
1438 pcmcia_cleanup_ioctl();
1439
1440 class_interface_unregister(&pcmcia_bus_interface);
1441
1442 bus_unregister(&pcmcia_bus_type);
1443 }
1444 module_exit(exit_pcmcia_bus);
1445
1446
1447 MODULE_ALIAS("ds");
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree