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tty: Redo the rocket driver locking
[linux-2.6/mini2440.git] / drivers / pcmcia / ds.c
blob47cab31ff6e49c0780692ead159cf81fb4113c58
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 #include <linux/dma-mapping.h>
27
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
36 /*====================================================================*/
37
38 /* Module parameters */
39
40 MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
41 MODULE_DESCRIPTION("PCMCIA Driver Services");
42 MODULE_LICENSE("GPL");
43
44 #ifdef CONFIG_PCMCIA_DEBUG
45 int ds_pc_debug;
46
47 module_param_named(pc_debug, ds_pc_debug, int, 0644);
48
49 #define ds_dbg(lvl, fmt, arg...) do { \
50 if (ds_pc_debug > (lvl)) \
51 printk(KERN_DEBUG "ds: " fmt , ## arg); \
52 } while (0)
53 #define ds_dev_dbg(lvl, dev, fmt, arg...) do { \
54 if (ds_pc_debug > (lvl)) \
55 dev_printk(KERN_DEBUG, dev, "ds: " fmt , ## arg); \
56 } while (0)
57 #else
58 #define ds_dbg(lvl, fmt, arg...) do { } while (0)
59 #define ds_dev_dbg(lvl, dev, fmt, arg...) do { } while (0)
60 #endif
61
62 spinlock_t pcmcia_dev_list_lock;
63
64 /*====================================================================*/
65
66 /* code which was in cs.c before */
67
68 /* String tables for error messages */
69
70 typedef struct lookup_t {
71 const int key;
72 const char *msg;
73 } lookup_t;
74
75 static const lookup_t error_table[] = {
76 { 0, "Operation succeeded" },
77 { -EIO, "Input/Output error" },
78 { -ENODEV, "No card present" },
79 { -EINVAL, "Bad parameter" },
80 { -EACCES, "Configuration locked" },
81 { -EBUSY, "Resource in use" },
82 { -ENOSPC, "No more items" },
83 { -ENOMEM, "Out of resource" },
84 };
85
86
87 static const lookup_t service_table[] = {
88 { AccessConfigurationRegister, "AccessConfigurationRegister" },
89 { AddSocketServices, "AddSocketServices" },
90 { AdjustResourceInfo, "AdjustResourceInfo" },
91 { CheckEraseQueue, "CheckEraseQueue" },
92 { CloseMemory, "CloseMemory" },
93 { DeregisterClient, "DeregisterClient" },
94 { DeregisterEraseQueue, "DeregisterEraseQueue" },
95 { GetCardServicesInfo, "GetCardServicesInfo" },
96 { GetClientInfo, "GetClientInfo" },
97 { GetConfigurationInfo, "GetConfigurationInfo" },
98 { GetEventMask, "GetEventMask" },
99 { GetFirstClient, "GetFirstClient" },
100 { GetFirstRegion, "GetFirstRegion" },
101 { GetFirstTuple, "GetFirstTuple" },
102 { GetNextClient, "GetNextClient" },
103 { GetNextRegion, "GetNextRegion" },
104 { GetNextTuple, "GetNextTuple" },
105 { GetStatus, "GetStatus" },
106 { GetTupleData, "GetTupleData" },
107 { MapMemPage, "MapMemPage" },
108 { ModifyConfiguration, "ModifyConfiguration" },
109 { ModifyWindow, "ModifyWindow" },
110 { OpenMemory, "OpenMemory" },
111 { ParseTuple, "ParseTuple" },
112 { ReadMemory, "ReadMemory" },
113 { RegisterClient, "RegisterClient" },
114 { RegisterEraseQueue, "RegisterEraseQueue" },
115 { RegisterMTD, "RegisterMTD" },
116 { ReleaseConfiguration, "ReleaseConfiguration" },
117 { ReleaseIO, "ReleaseIO" },
118 { ReleaseIRQ, "ReleaseIRQ" },
119 { ReleaseWindow, "ReleaseWindow" },
120 { RequestConfiguration, "RequestConfiguration" },
121 { RequestIO, "RequestIO" },
122 { RequestIRQ, "RequestIRQ" },
123 { RequestSocketMask, "RequestSocketMask" },
124 { RequestWindow, "RequestWindow" },
125 { ResetCard, "ResetCard" },
126 { SetEventMask, "SetEventMask" },
127 { ValidateCIS, "ValidateCIS" },
128 { WriteMemory, "WriteMemory" },
129 { BindDevice, "BindDevice" },
130 { BindMTD, "BindMTD" },
131 { ReportError, "ReportError" },
132 { SuspendCard, "SuspendCard" },
133 { ResumeCard, "ResumeCard" },
134 { EjectCard, "EjectCard" },
135 { InsertCard, "InsertCard" },
136 { ReplaceCIS, "ReplaceCIS" }
137 };
138
139 const char *pcmcia_error_func(int func)
140 {
141 int i;
142
143 for (i = 0; i < ARRAY_SIZE(service_table); i++)
144 if (service_table[i].key == func)
145 return service_table[i].msg;
146
147 return "Unknown service number";
148 }
149 EXPORT_SYMBOL(pcmcia_error_func);
150
151 const char *pcmcia_error_ret(int ret)
152 {
153 int i;
154
155 for (i = 0; i < ARRAY_SIZE(error_table); i++)
156 if (error_table[i].key == ret)
157 return error_table[i].msg;
158
159 return "unknown";
160 }
161 EXPORT_SYMBOL(pcmcia_error_ret);
162
163 /*======================================================================*/
164
165
166
167 static void pcmcia_check_driver(struct pcmcia_driver *p_drv)
168 {
169 struct pcmcia_device_id *did = p_drv->id_table;
170 unsigned int i;
171 u32 hash;
172
173 if (!p_drv->probe || !p_drv->remove)
174 printk(KERN_DEBUG "pcmcia: %s lacks a requisite callback "
175 "function\n", p_drv->drv.name);
176
177 while (did && did->match_flags) {
178 for (i=0; i<4; i++) {
179 if (!did->prod_id[i])
180 continue;
181
182 hash = crc32(0, did->prod_id[i], strlen(did->prod_id[i]));
183 if (hash == did->prod_id_hash[i])
184 continue;
185
186 printk(KERN_DEBUG "pcmcia: %s: invalid hash for "
187 "product string \"%s\": is 0x%x, should "
188 "be 0x%x\n", p_drv->drv.name, did->prod_id[i],
189 did->prod_id_hash[i], hash);
190 printk(KERN_DEBUG "pcmcia: see "
191 "Documentation/pcmcia/devicetable.txt for "
192 "details\n");
193 }
194 did++;
195 }
196
197 return;
198 }
199
200
201 /*======================================================================*/
202
203
204 struct pcmcia_dynid {
205 struct list_head node;
206 struct pcmcia_device_id id;
207 };
208
209 /**
210 * pcmcia_store_new_id - add a new PCMCIA device ID to this driver and re-probe devices
211 * @driver: target device driver
212 * @buf: buffer for scanning device ID data
213 * @count: input size
214 *
215 * Adds a new dynamic PCMCIA device ID to this driver,
216 * and causes the driver to probe for all devices again.
217 */
218 static ssize_t
219 pcmcia_store_new_id(struct device_driver *driver, const char *buf, size_t count)
220 {
221 struct pcmcia_dynid *dynid;
222 struct pcmcia_driver *pdrv = to_pcmcia_drv(driver);
223 __u16 match_flags, manf_id, card_id;
224 __u8 func_id, function, device_no;
225 __u32 prod_id_hash[4] = {0, 0, 0, 0};
226 int fields=0;
227 int retval = 0;
228
229 fields = sscanf(buf, "%hx %hx %hx %hhx %hhx %hhx %x %x %x %x",
230 &match_flags, &manf_id, &card_id, &func_id, &function, &device_no,
231 &prod_id_hash[0], &prod_id_hash[1], &prod_id_hash[2], &prod_id_hash[3]);
232 if (fields < 6)
233 return -EINVAL;
234
235 dynid = kzalloc(sizeof(struct pcmcia_dynid), GFP_KERNEL);
236 if (!dynid)
237 return -ENOMEM;
238
239 INIT_LIST_HEAD(&dynid->node);
240 dynid->id.match_flags = match_flags;
241 dynid->id.manf_id = manf_id;
242 dynid->id.card_id = card_id;
243 dynid->id.func_id = func_id;
244 dynid->id.function = function;
245 dynid->id.device_no = device_no;
246 memcpy(dynid->id.prod_id_hash, prod_id_hash, sizeof(__u32) * 4);
247
248 spin_lock(&pdrv->dynids.lock);
249 list_add_tail(&pdrv->dynids.list, &dynid->node);
250 spin_unlock(&pdrv->dynids.lock);
251
252 if (get_driver(&pdrv->drv)) {
253 retval = driver_attach(&pdrv->drv);
254 put_driver(&pdrv->drv);
255 }
256
257 if (retval)
258 return retval;
259 return count;
260 }
261 static DRIVER_ATTR(new_id, S_IWUSR, NULL, pcmcia_store_new_id);
262
263 static void
264 pcmcia_free_dynids(struct pcmcia_driver *drv)
265 {
266 struct pcmcia_dynid *dynid, *n;
267
268 spin_lock(&drv->dynids.lock);
269 list_for_each_entry_safe(dynid, n, &drv->dynids.list, node) {
270 list_del(&dynid->node);
271 kfree(dynid);
272 }
273 spin_unlock(&drv->dynids.lock);
274 }
275
276 static int
277 pcmcia_create_newid_file(struct pcmcia_driver *drv)
278 {
279 int error = 0;
280 if (drv->probe != NULL)
281 error = driver_create_file(&drv->drv, &driver_attr_new_id);
282 return error;
283 }
284
285
286 /**
287 * pcmcia_register_driver - register a PCMCIA driver with the bus core
288 * @driver: the &driver being registered
289 *
290 * Registers a PCMCIA driver with the PCMCIA bus core.
291 */
292 int pcmcia_register_driver(struct pcmcia_driver *driver)
293 {
294 int error;
295
296 if (!driver)
297 return -EINVAL;
298
299 pcmcia_check_driver(driver);
300
301 /* initialize common fields */
302 driver->drv.bus = &pcmcia_bus_type;
303 driver->drv.owner = driver->owner;
304 spin_lock_init(&driver->dynids.lock);
305 INIT_LIST_HEAD(&driver->dynids.list);
306
307 ds_dbg(3, "registering driver %s\n", driver->drv.name);
308
309 error = driver_register(&driver->drv);
310 if (error < 0)
311 return error;
312
313 error = pcmcia_create_newid_file(driver);
314 if (error)
315 driver_unregister(&driver->drv);
316
317 return error;
318 }
319 EXPORT_SYMBOL(pcmcia_register_driver);
320
321 /**
322 * pcmcia_unregister_driver - unregister a PCMCIA driver with the bus core
323 * @driver: the &driver being unregistered
324 */
325 void pcmcia_unregister_driver(struct pcmcia_driver *driver)
326 {
327 ds_dbg(3, "unregistering driver %s\n", driver->drv.name);
328 driver_unregister(&driver->drv);
329 pcmcia_free_dynids(driver);
330 }
331 EXPORT_SYMBOL(pcmcia_unregister_driver);
332
333
334 /* pcmcia_device handling */
335
336 struct pcmcia_device * pcmcia_get_dev(struct pcmcia_device *p_dev)
337 {
338 struct device *tmp_dev;
339 tmp_dev = get_device(&p_dev->dev);
340 if (!tmp_dev)
341 return NULL;
342 return to_pcmcia_dev(tmp_dev);
343 }
344
345 void pcmcia_put_dev(struct pcmcia_device *p_dev)
346 {
347 if (p_dev)
348 put_device(&p_dev->dev);
349 }
350
351 static void pcmcia_release_function(struct kref *ref)
352 {
353 struct config_t *c = container_of(ref, struct config_t, ref);
354 ds_dbg(1, "releasing config_t\n");
355 kfree(c);
356 }
357
358 static void pcmcia_release_dev(struct device *dev)
359 {
360 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
361 ds_dev_dbg(1, dev, "releasing device\n");
362 pcmcia_put_socket(p_dev->socket);
363 kfree(p_dev->devname);
364 kref_put(&p_dev->function_config->ref, pcmcia_release_function);
365 kfree(p_dev);
366 }
367
368 static void pcmcia_add_device_later(struct pcmcia_socket *s, int mfc)
369 {
370 if (!s->pcmcia_state.device_add_pending) {
371 ds_dev_dbg(1, &s->dev, "scheduling to add %s secondary"
372 " device to %d\n", mfc ? "mfc" : "pfc", s->sock);
373 s->pcmcia_state.device_add_pending = 1;
374 s->pcmcia_state.mfc_pfc = mfc;
375 schedule_work(&s->device_add);
376 }
377 return;
378 }
379
380 static int pcmcia_device_probe(struct device * dev)
381 {
382 struct pcmcia_device *p_dev;
383 struct pcmcia_driver *p_drv;
384 struct pcmcia_device_id *did;
385 struct pcmcia_socket *s;
386 cistpl_config_t cis_config;
387 int ret = 0;
388
389 dev = get_device(dev);
390 if (!dev)
391 return -ENODEV;
392
393 p_dev = to_pcmcia_dev(dev);
394 p_drv = to_pcmcia_drv(dev->driver);
395 s = p_dev->socket;
396
397 /* The PCMCIA code passes the match data in via dev->driver_data
398 * which is an ugly hack. Once the driver probe is called it may
399 * and often will overwrite the match data so we must save it first
400 *
401 * handle pseudo multifunction devices:
402 * there are at most two pseudo multifunction devices.
403 * if we're matching against the first, schedule a
404 * call which will then check whether there are two
405 * pseudo devices, and if not, add the second one.
406 */
407 did = p_dev->dev.driver_data;
408
409 ds_dev_dbg(1, dev, "trying to bind to %s\n", p_drv->drv.name);
410
411 if ((!p_drv->probe) || (!p_dev->function_config) ||
412 (!try_module_get(p_drv->owner))) {
413 ret = -EINVAL;
414 goto put_dev;
415 }
416
417 /* set up some more device information */
418 ret = pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_CONFIG,
419 &cis_config);
420 if (!ret) {
421 p_dev->conf.ConfigBase = cis_config.base;
422 p_dev->conf.Present = cis_config.rmask[0];
423 } else {
424 dev_printk(KERN_INFO, dev,
425 "pcmcia: could not parse base and rmask0 of CIS\n");
426 p_dev->conf.ConfigBase = 0;
427 p_dev->conf.Present = 0;
428 }
429
430 ret = p_drv->probe(p_dev);
431 if (ret) {
432 ds_dev_dbg(1, dev, "binding to %s failed with %d\n",
433 p_drv->drv.name, ret);
434 goto put_module;
435 }
436
437 if (did && (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) &&
438 (p_dev->socket->device_count == 1) && (p_dev->device_no == 0))
439 pcmcia_add_device_later(p_dev->socket, 0);
440
441 put_module:
442 if (ret)
443 module_put(p_drv->owner);
444 put_dev:
445 if (ret)
446 put_device(dev);
447 return (ret);
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, struct pcmcia_device *leftover)
455 {
456 struct pcmcia_device *p_dev;
457 struct pcmcia_device *tmp;
458 unsigned long flags;
459
460 ds_dev_dbg(2, leftover ? &leftover->dev : &s->dev,
461 "pcmcia_card_remove(%d) %s\n", s->sock,
462 leftover ? leftover->devname : "");
463
464 if (!leftover)
465 s->device_count = 0;
466 else
467 s->device_count = 1;
468
469 /* unregister all pcmcia_devices registered with this socket, except leftover */
470 list_for_each_entry_safe(p_dev, tmp, &s->devices_list, socket_device_list) {
471 if (p_dev == leftover)
472 continue;
473
474 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
475 list_del(&p_dev->socket_device_list);
476 p_dev->_removed=1;
477 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
478
479 ds_dev_dbg(2, &p_dev->dev, "unregistering device\n");
480 device_unregister(&p_dev->dev);
481 }
482
483 return;
484 }
485
486 static int pcmcia_device_remove(struct device * dev)
487 {
488 struct pcmcia_device *p_dev;
489 struct pcmcia_driver *p_drv;
490 struct pcmcia_device_id *did;
491 int i;
492
493 p_dev = to_pcmcia_dev(dev);
494 p_drv = to_pcmcia_drv(dev->driver);
495
496 ds_dev_dbg(1, dev, "removing device\n");
497
498 /* If we're removing the primary module driving a
499 * pseudo multi-function card, we need to unbind
500 * all devices
501 */
502 did = p_dev->dev.driver_data;
503 if (did && (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) &&
504 (p_dev->socket->device_count != 0) &&
505 (p_dev->device_no == 0))
506 pcmcia_card_remove(p_dev->socket, p_dev);
507
508 /* detach the "instance" */
509 if (!p_drv)
510 return 0;
511
512 if (p_drv->remove)
513 p_drv->remove(p_dev);
514
515 p_dev->dev_node = NULL;
516
517 /* check for proper unloading */
518 if (p_dev->_irq || p_dev->_io || p_dev->_locked)
519 dev_printk(KERN_INFO, dev,
520 "pcmcia: driver %s did not release config properly\n",
521 p_drv->drv.name);
522
523 for (i = 0; i < MAX_WIN; i++)
524 if (p_dev->_win & CLIENT_WIN_REQ(i))
525 dev_printk(KERN_INFO, dev,
526 "pcmcia: driver %s did not release window properly\n",
527 p_drv->drv.name);
528
529 /* references from pcmcia_probe_device */
530 pcmcia_put_dev(p_dev);
531 module_put(p_drv->owner);
532
533 return 0;
534 }
535
536
537 /*
538 * pcmcia_device_query -- determine information about a pcmcia device
539 */
540 static int pcmcia_device_query(struct pcmcia_device *p_dev)
541 {
542 cistpl_manfid_t manf_id;
543 cistpl_funcid_t func_id;
544 cistpl_vers_1_t *vers1;
545 unsigned int i;
546
547 vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL);
548 if (!vers1)
549 return -ENOMEM;
550
551 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
552 CISTPL_MANFID, &manf_id)) {
553 p_dev->manf_id = manf_id.manf;
554 p_dev->card_id = manf_id.card;
555 p_dev->has_manf_id = 1;
556 p_dev->has_card_id = 1;
557 }
558
559 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
560 CISTPL_FUNCID, &func_id)) {
561 p_dev->func_id = func_id.func;
562 p_dev->has_func_id = 1;
563 } else {
564 /* rule of thumb: cards with no FUNCID, but with
565 * common memory device geometry information, are
566 * probably memory cards (from pcmcia-cs) */
567 cistpl_device_geo_t *devgeo;
568
569 devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL);
570 if (!devgeo) {
571 kfree(vers1);
572 return -ENOMEM;
573 }
574 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
575 CISTPL_DEVICE_GEO, devgeo)) {
576 ds_dev_dbg(0, &p_dev->dev,
577 "mem device geometry probably means "
578 "FUNCID_MEMORY\n");
579 p_dev->func_id = CISTPL_FUNCID_MEMORY;
580 p_dev->has_func_id = 1;
581 }
582 kfree(devgeo);
583 }
584
585 if (!pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_VERS_1,
586 vers1)) {
587 for (i=0; i < vers1->ns; i++) {
588 char *tmp;
589 unsigned int length;
590
591 tmp = vers1->str + vers1->ofs[i];
592
593 length = strlen(tmp) + 1;
594 if ((length < 2) || (length > 255))
595 continue;
596
597 p_dev->prod_id[i] = kmalloc(sizeof(char) * length,
598 GFP_KERNEL);
599 if (!p_dev->prod_id[i])
600 continue;
601
602 p_dev->prod_id[i] = strncpy(p_dev->prod_id[i],
603 tmp, length);
604 }
605 }
606
607 kfree(vers1);
608 return 0;
609 }
610
611
612 /* device_add_lock is needed to avoid double registration by cardmgr and kernel.
613 * Serializes pcmcia_device_add; will most likely be removed in future.
614 *
615 * While it has the caveat that adding new PCMCIA devices inside(!) device_register()
616 * won't work, this doesn't matter much at the moment: the driver core doesn't
617 * support it either.
618 */
619 static DEFINE_MUTEX(device_add_lock);
620
621 struct pcmcia_device * pcmcia_device_add(struct pcmcia_socket *s, unsigned int function)
622 {
623 struct pcmcia_device *p_dev, *tmp_dev;
624 unsigned long flags;
625
626 s = pcmcia_get_socket(s);
627 if (!s)
628 return NULL;
629
630 mutex_lock(&device_add_lock);
631
632 ds_dbg(3, "adding device to %d, function %d\n", s->sock, function);
633
634 /* max of 4 devices per card */
635 if (s->device_count == 4)
636 goto err_put;
637
638 p_dev = kzalloc(sizeof(struct pcmcia_device), GFP_KERNEL);
639 if (!p_dev)
640 goto err_put;
641
642 p_dev->socket = s;
643 p_dev->device_no = (s->device_count++);
644 p_dev->func = function;
645
646 p_dev->dev.bus = &pcmcia_bus_type;
647 p_dev->dev.parent = s->dev.parent;
648 p_dev->dev.release = pcmcia_release_dev;
649 /* by default don't allow DMA */
650 p_dev->dma_mask = DMA_MASK_NONE;
651 p_dev->dev.dma_mask = &p_dev->dma_mask;
652 dev_set_name(&p_dev->dev, "%d.%d", p_dev->socket->sock, p_dev->device_no);
653 if (!dev_name(&p_dev->dev))
654 goto err_free;
655 p_dev->devname = kasprintf(GFP_KERNEL, "pcmcia%s", dev_name(&p_dev->dev));
656 if (!p_dev->devname)
657 goto err_free;
658 ds_dev_dbg(3, &p_dev->dev, "devname is %s\n", p_dev->devname);
659
660 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
661
662 /*
663 * p_dev->function_config must be the same for all card functions.
664 * Note that this is serialized by the device_add_lock, so that
665 * only one such struct will be created.
666 */
667 list_for_each_entry(tmp_dev, &s->devices_list, socket_device_list)
668 if (p_dev->func == tmp_dev->func) {
669 p_dev->function_config = tmp_dev->function_config;
670 p_dev->io = tmp_dev->io;
671 p_dev->irq = tmp_dev->irq;
672 kref_get(&p_dev->function_config->ref);
673 }
674
675 /* Add to the list in pcmcia_bus_socket */
676 list_add(&p_dev->socket_device_list, &s->devices_list);
677
678 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
679
680 if (!p_dev->function_config) {
681 ds_dev_dbg(3, &p_dev->dev, "creating config_t\n");
682 p_dev->function_config = kzalloc(sizeof(struct config_t),
683 GFP_KERNEL);
684 if (!p_dev->function_config)
685 goto err_unreg;
686 kref_init(&p_dev->function_config->ref);
687 }
688
689 dev_printk(KERN_NOTICE, &p_dev->dev,
690 "pcmcia: registering new device %s\n",
691 p_dev->devname);
692
693 pcmcia_device_query(p_dev);
694
695 if (device_register(&p_dev->dev))
696 goto err_unreg;
697
698 mutex_unlock(&device_add_lock);
699
700 return p_dev;
701
702 err_unreg:
703 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
704 list_del(&p_dev->socket_device_list);
705 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
706
707 err_free:
708 kfree(p_dev->devname);
709 kfree(p_dev);
710 s->device_count--;
711 err_put:
712 mutex_unlock(&device_add_lock);
713 pcmcia_put_socket(s);
714
715 return NULL;
716 }
717
718
719 static int pcmcia_card_add(struct pcmcia_socket *s)
720 {
721 cistpl_longlink_mfc_t mfc;
722 unsigned int no_funcs, i, no_chains;
723 int ret = 0;
724
725 if (!(s->resource_setup_done)) {
726 ds_dev_dbg(3, &s->dev,
727 "no resources available, delaying card_add\n");
728 return -EAGAIN; /* try again, but later... */
729 }
730
731 if (pcmcia_validate_mem(s)) {
732 ds_dev_dbg(3, &s->dev, "validating mem resources failed, "
733 "delaying card_add\n");
734 return -EAGAIN; /* try again, but later... */
735 }
736
737 ret = pccard_validate_cis(s, BIND_FN_ALL, &no_chains);
738 if (ret || !no_chains) {
739 ds_dev_dbg(0, &s->dev, "invalid CIS or invalid resources\n");
740 return -ENODEV;
741 }
742
743 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
744 no_funcs = mfc.nfn;
745 else
746 no_funcs = 1;
747 s->functions = no_funcs;
748
749 for (i=0; i < no_funcs; i++)
750 pcmcia_device_add(s, i);
751
752 return (ret);
753 }
754
755
756 static void pcmcia_delayed_add_device(struct work_struct *work)
757 {
758 struct pcmcia_socket *s =
759 container_of(work, struct pcmcia_socket, device_add);
760 ds_dev_dbg(1, &s->dev, "adding additional device to %d\n", s->sock);
761 pcmcia_device_add(s, s->pcmcia_state.mfc_pfc);
762 s->pcmcia_state.device_add_pending = 0;
763 s->pcmcia_state.mfc_pfc = 0;
764 }
765
766 static int pcmcia_requery(struct device *dev, void * _data)
767 {
768 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
769 if (!p_dev->dev.driver) {
770 ds_dev_dbg(1, dev, "update device information\n");
771 pcmcia_device_query(p_dev);
772 }
773
774 return 0;
775 }
776
777 static void pcmcia_bus_rescan(struct pcmcia_socket *skt, int new_cis)
778 {
779 int no_devices = 0;
780 int ret = 0;
781 unsigned long flags;
782
783 /* must be called with skt_mutex held */
784 ds_dev_dbg(0, &skt->dev, "re-scanning socket %d\n", skt->sock);
785
786 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
787 if (list_empty(&skt->devices_list))
788 no_devices = 1;
789 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
790
791 /* If this is because of a CIS override, start over */
792 if (new_cis && !no_devices)
793 pcmcia_card_remove(skt, NULL);
794
795 /* if no devices were added for this socket yet because of
796 * missing resource information or other trouble, we need to
797 * do this now. */
798 if (no_devices || new_cis) {
799 ret = pcmcia_card_add(skt);
800 if (ret)
801 return;
802 }
803
804 /* some device information might have changed because of a CIS
805 * update or because we can finally read it correctly... so
806 * determine it again, overwriting old values if necessary. */
807 bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery);
808
809 /* we re-scan all devices, not just the ones connected to this
810 * socket. This does not matter, though. */
811 ret = bus_rescan_devices(&pcmcia_bus_type);
812 if (ret)
813 printk(KERN_INFO "pcmcia: bus_rescan_devices failed\n");
814 }
815
816 #ifdef CONFIG_PCMCIA_LOAD_CIS
817
818 /**
819 * pcmcia_load_firmware - load CIS from userspace if device-provided is broken
820 * @dev: the pcmcia device which needs a CIS override
821 * @filename: requested filename in /lib/firmware/
822 *
823 * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if
824 * the one provided by the card is broken. The firmware files reside in
825 * /lib/firmware/ in userspace.
826 */
827 static int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
828 {
829 struct pcmcia_socket *s = dev->socket;
830 const struct firmware *fw;
831 char path[FIRMWARE_NAME_MAX];
832 int ret = -ENOMEM;
833 int no_funcs;
834 int old_funcs;
835 cistpl_longlink_mfc_t mfc;
836
837 if (!filename)
838 return -EINVAL;
839
840 ds_dev_dbg(1, &dev->dev, "trying to load CIS file %s\n", filename);
841
842 if (strlen(filename) > (FIRMWARE_NAME_MAX - 1)) {
843 dev_printk(KERN_WARNING, &dev->dev,
844 "pcmcia: CIS filename is too long [%s]\n",
845 filename);
846 return -EINVAL;
847 }
848
849 snprintf(path, sizeof(path), "%s", filename);
850
851 if (request_firmware(&fw, path, &dev->dev) == 0) {
852 if (fw->size >= CISTPL_MAX_CIS_SIZE) {
853 ret = -EINVAL;
854 dev_printk(KERN_ERR, &dev->dev,
855 "pcmcia: CIS override is too big\n");
856 goto release;
857 }
858
859 if (!pcmcia_replace_cis(s, fw->data, fw->size))
860 ret = 0;
861 else {
862 dev_printk(KERN_ERR, &dev->dev,
863 "pcmcia: CIS override failed\n");
864 goto release;
865 }
866
867
868 /* update information */
869 pcmcia_device_query(dev);
870
871 /* does this cis override add or remove functions? */
872 old_funcs = s->functions;
873
874 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
875 no_funcs = mfc.nfn;
876 else
877 no_funcs = 1;
878 s->functions = no_funcs;
879
880 if (old_funcs > no_funcs)
881 pcmcia_card_remove(s, dev);
882 else if (no_funcs > old_funcs)
883 pcmcia_add_device_later(s, 1);
884 }
885 release:
886 release_firmware(fw);
887
888 return (ret);
889 }
890
891 #else /* !CONFIG_PCMCIA_LOAD_CIS */
892
893 static inline int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
894 {
895 return -ENODEV;
896 }
897
898 #endif
899
900
901 static inline int pcmcia_devmatch(struct pcmcia_device *dev,
902 struct pcmcia_device_id *did)
903 {
904 if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
905 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
906 return 0;
907 }
908
909 if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
910 if ((!dev->has_card_id) || (dev->card_id != did->card_id))
911 return 0;
912 }
913
914 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
915 if (dev->func != did->function)
916 return 0;
917 }
918
919 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
920 if (!dev->prod_id[0])
921 return 0;
922 if (strcmp(did->prod_id[0], dev->prod_id[0]))
923 return 0;
924 }
925
926 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
927 if (!dev->prod_id[1])
928 return 0;
929 if (strcmp(did->prod_id[1], dev->prod_id[1]))
930 return 0;
931 }
932
933 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
934 if (!dev->prod_id[2])
935 return 0;
936 if (strcmp(did->prod_id[2], dev->prod_id[2]))
937 return 0;
938 }
939
940 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
941 if (!dev->prod_id[3])
942 return 0;
943 if (strcmp(did->prod_id[3], dev->prod_id[3]))
944 return 0;
945 }
946
947 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
948 if (dev->device_no != did->device_no)
949 return 0;
950 }
951
952 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
953 if ((!dev->has_func_id) || (dev->func_id != did->func_id))
954 return 0;
955
956 /* if this is a pseudo-multi-function device,
957 * we need explicit matches */
958 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO)
959 return 0;
960 if (dev->device_no)
961 return 0;
962
963 /* also, FUNC_ID matching needs to be activated by userspace
964 * after it has re-checked that there is no possible module
965 * with a prod_id/manf_id/card_id match.
966 */
967 ds_dev_dbg(0, &dev->dev,
968 "skipping FUNC_ID match until userspace interaction\n");
969 if (!dev->allow_func_id_match)
970 return 0;
971 }
972
973 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
974 ds_dev_dbg(0, &dev->dev, "device needs a fake CIS\n");
975 if (!dev->socket->fake_cis)
976 pcmcia_load_firmware(dev, did->cisfile);
977
978 if (!dev->socket->fake_cis)
979 return 0;
980 }
981
982 if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
983 int i;
984 for (i=0; i<4; i++)
985 if (dev->prod_id[i])
986 return 0;
987 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
988 return 0;
989 }
990
991 dev->dev.driver_data = (void *) did;
992
993 return 1;
994 }
995
996
997 static int pcmcia_bus_match(struct device * dev, struct device_driver * drv) {
998 struct pcmcia_device * p_dev = to_pcmcia_dev(dev);
999 struct pcmcia_driver * p_drv = to_pcmcia_drv(drv);
1000 struct pcmcia_device_id *did = p_drv->id_table;
1001 struct pcmcia_dynid *dynid;
1002
1003 /* match dynamic devices first */
1004 spin_lock(&p_drv->dynids.lock);
1005 list_for_each_entry(dynid, &p_drv->dynids.list, node) {
1006 ds_dev_dbg(3, dev, "trying to match to %s\n", drv->name);
1007 if (pcmcia_devmatch(p_dev, &dynid->id)) {
1008 ds_dev_dbg(0, dev, "matched to %s\n", drv->name);
1009 spin_unlock(&p_drv->dynids.lock);
1010 return 1;
1011 }
1012 }
1013 spin_unlock(&p_drv->dynids.lock);
1014
1015 #ifdef CONFIG_PCMCIA_IOCTL
1016 /* matching by cardmgr */
1017 if (p_dev->cardmgr == p_drv) {
1018 ds_dev_dbg(0, dev, "cardmgr matched to %s\n", drv->name);
1019 return 1;
1020 }
1021 #endif
1022
1023 while (did && did->match_flags) {
1024 ds_dev_dbg(3, dev, "trying to match to %s\n", drv->name);
1025 if (pcmcia_devmatch(p_dev, did)) {
1026 ds_dev_dbg(0, dev, "matched to %s\n", drv->name);
1027 return 1;
1028 }
1029 did++;
1030 }
1031
1032 return 0;
1033 }
1034
1035 #ifdef CONFIG_HOTPLUG
1036
1037 static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
1038 {
1039 struct pcmcia_device *p_dev;
1040 int i;
1041 u32 hash[4] = { 0, 0, 0, 0};
1042
1043 if (!dev)
1044 return -ENODEV;
1045
1046 p_dev = to_pcmcia_dev(dev);
1047
1048 /* calculate hashes */
1049 for (i=0; i<4; i++) {
1050 if (!p_dev->prod_id[i])
1051 continue;
1052 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
1053 }
1054
1055 if (add_uevent_var(env, "SOCKET_NO=%u", p_dev->socket->sock))
1056 return -ENOMEM;
1057
1058 if (add_uevent_var(env, "DEVICE_NO=%02X", p_dev->device_no))
1059 return -ENOMEM;
1060
1061 if (add_uevent_var(env, "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
1062 "pa%08Xpb%08Xpc%08Xpd%08X",
1063 p_dev->has_manf_id ? p_dev->manf_id : 0,
1064 p_dev->has_card_id ? p_dev->card_id : 0,
1065 p_dev->has_func_id ? p_dev->func_id : 0,
1066 p_dev->func,
1067 p_dev->device_no,
1068 hash[0],
1069 hash[1],
1070 hash[2],
1071 hash[3]))
1072 return -ENOMEM;
1073
1074 return 0;
1075 }
1076
1077 #else
1078
1079 static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
1080 {
1081 return -ENODEV;
1082 }
1083
1084 #endif
1085
1086 /************************ runtime PM support ***************************/
1087
1088 static int pcmcia_dev_suspend(struct device *dev, pm_message_t state);
1089 static int pcmcia_dev_resume(struct device *dev);
1090
1091 static int runtime_suspend(struct device *dev)
1092 {
1093 int rc;
1094
1095 down(&dev->sem);
1096 rc = pcmcia_dev_suspend(dev, PMSG_SUSPEND);
1097 up(&dev->sem);
1098 return rc;
1099 }
1100
1101 static void runtime_resume(struct device *dev)
1102 {
1103 int rc;
1104
1105 down(&dev->sem);
1106 rc = pcmcia_dev_resume(dev);
1107 up(&dev->sem);
1108 }
1109
1110 /************************ per-device sysfs output ***************************/
1111
1112 #define pcmcia_device_attr(field, test, format) \
1113 static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf) \
1114 { \
1115 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
1116 return p_dev->test ? sprintf (buf, format, p_dev->field) : -ENODEV; \
1117 }
1118
1119 #define pcmcia_device_stringattr(name, field) \
1120 static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf) \
1121 { \
1122 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
1123 return p_dev->field ? sprintf (buf, "%s\n", p_dev->field) : -ENODEV; \
1124 }
1125
1126 pcmcia_device_attr(func, socket, "0x%02x\n");
1127 pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
1128 pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
1129 pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
1130 pcmcia_device_stringattr(prod_id1, prod_id[0]);
1131 pcmcia_device_stringattr(prod_id2, prod_id[1]);
1132 pcmcia_device_stringattr(prod_id3, prod_id[2]);
1133 pcmcia_device_stringattr(prod_id4, prod_id[3]);
1134
1135
1136 static ssize_t pcmcia_show_pm_state(struct device *dev, struct device_attribute *attr, char *buf)
1137 {
1138 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1139
1140 if (p_dev->suspended)
1141 return sprintf(buf, "off\n");
1142 else
1143 return sprintf(buf, "on\n");
1144 }
1145
1146 static ssize_t pcmcia_store_pm_state(struct device *dev, struct device_attribute *attr,
1147 const char *buf, size_t count)
1148 {
1149 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1150 int ret = 0;
1151
1152 if (!count)
1153 return -EINVAL;
1154
1155 if ((!p_dev->suspended) && !strncmp(buf, "off", 3))
1156 ret = runtime_suspend(dev);
1157 else if (p_dev->suspended && !strncmp(buf, "on", 2))
1158 runtime_resume(dev);
1159
1160 return ret ? ret : count;
1161 }
1162
1163
1164 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1165 {
1166 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1167 int i;
1168 u32 hash[4] = { 0, 0, 0, 0};
1169
1170 /* calculate hashes */
1171 for (i=0; i<4; i++) {
1172 if (!p_dev->prod_id[i])
1173 continue;
1174 hash[i] = crc32(0,p_dev->prod_id[i],strlen(p_dev->prod_id[i]));
1175 }
1176 return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
1177 "pa%08Xpb%08Xpc%08Xpd%08X\n",
1178 p_dev->has_manf_id ? p_dev->manf_id : 0,
1179 p_dev->has_card_id ? p_dev->card_id : 0,
1180 p_dev->has_func_id ? p_dev->func_id : 0,
1181 p_dev->func, p_dev->device_no,
1182 hash[0], hash[1], hash[2], hash[3]);
1183 }
1184
1185 static ssize_t pcmcia_store_allow_func_id_match(struct device *dev,
1186 struct device_attribute *attr, const char *buf, size_t count)
1187 {
1188 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1189 int ret;
1190
1191 if (!count)
1192 return -EINVAL;
1193
1194 mutex_lock(&p_dev->socket->skt_mutex);
1195 p_dev->allow_func_id_match = 1;
1196 mutex_unlock(&p_dev->socket->skt_mutex);
1197
1198 ret = bus_rescan_devices(&pcmcia_bus_type);
1199 if (ret)
1200 printk(KERN_INFO "pcmcia: bus_rescan_devices failed after "
1201 "allowing func_id matches\n");
1202
1203 return count;
1204 }
1205
1206 static struct device_attribute pcmcia_dev_attrs[] = {
1207 __ATTR(function, 0444, func_show, NULL),
1208 __ATTR(pm_state, 0644, pcmcia_show_pm_state, pcmcia_store_pm_state),
1209 __ATTR_RO(func_id),
1210 __ATTR_RO(manf_id),
1211 __ATTR_RO(card_id),
1212 __ATTR_RO(prod_id1),
1213 __ATTR_RO(prod_id2),
1214 __ATTR_RO(prod_id3),
1215 __ATTR_RO(prod_id4),
1216 __ATTR_RO(modalias),
1217 __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match),
1218 __ATTR_NULL,
1219 };
1220
1221 /* PM support, also needed for reset */
1222
1223 static int pcmcia_dev_suspend(struct device * dev, pm_message_t state)
1224 {
1225 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1226 struct pcmcia_driver *p_drv = NULL;
1227 int ret = 0;
1228
1229 if (p_dev->suspended)
1230 return 0;
1231
1232 ds_dev_dbg(2, dev, "suspending\n");
1233
1234 if (dev->driver)
1235 p_drv = to_pcmcia_drv(dev->driver);
1236
1237 if (!p_drv)
1238 goto out;
1239
1240 if (p_drv->suspend) {
1241 ret = p_drv->suspend(p_dev);
1242 if (ret) {
1243 dev_printk(KERN_ERR, dev,
1244 "pcmcia: device %s (driver %s) did "
1245 "not want to go to sleep (%d)\n",
1246 p_dev->devname, p_drv->drv.name, ret);
1247 goto out;
1248 }
1249 }
1250
1251 if (p_dev->device_no == p_dev->func) {
1252 ds_dev_dbg(2, dev, "releasing configuration\n");
1253 pcmcia_release_configuration(p_dev);
1254 }
1255
1256 out:
1257 if (!ret)
1258 p_dev->suspended = 1;
1259 return ret;
1260 }
1261
1262
1263 static int pcmcia_dev_resume(struct device * dev)
1264 {
1265 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1266 struct pcmcia_driver *p_drv = NULL;
1267 int ret = 0;
1268
1269 if (!p_dev->suspended)
1270 return 0;
1271
1272 ds_dev_dbg(2, dev, "resuming\n");
1273
1274 if (dev->driver)
1275 p_drv = to_pcmcia_drv(dev->driver);
1276
1277 if (!p_drv)
1278 goto out;
1279
1280 if (p_dev->device_no == p_dev->func) {
1281 ds_dev_dbg(2, dev, "requesting configuration\n");
1282 ret = pcmcia_request_configuration(p_dev, &p_dev->conf);
1283 if (ret)
1284 goto out;
1285 }
1286
1287 if (p_drv->resume)
1288 ret = p_drv->resume(p_dev);
1289
1290 out:
1291 if (!ret)
1292 p_dev->suspended = 0;
1293 return ret;
1294 }
1295
1296
1297 static int pcmcia_bus_suspend_callback(struct device *dev, void * _data)
1298 {
1299 struct pcmcia_socket *skt = _data;
1300 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1301
1302 if (p_dev->socket != skt || p_dev->suspended)
1303 return 0;
1304
1305 return runtime_suspend(dev);
1306 }
1307
1308 static int pcmcia_bus_resume_callback(struct device *dev, void * _data)
1309 {
1310 struct pcmcia_socket *skt = _data;
1311 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1312
1313 if (p_dev->socket != skt || !p_dev->suspended)
1314 return 0;
1315
1316 runtime_resume(dev);
1317
1318 return 0;
1319 }
1320
1321 static int pcmcia_bus_resume(struct pcmcia_socket *skt)
1322 {
1323 ds_dev_dbg(2, &skt->dev, "resuming socket %d\n", skt->sock);
1324 bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback);
1325 return 0;
1326 }
1327
1328 static int pcmcia_bus_suspend(struct pcmcia_socket *skt)
1329 {
1330 ds_dev_dbg(2, &skt->dev, "suspending socket %d\n", skt->sock);
1331 if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt,
1332 pcmcia_bus_suspend_callback)) {
1333 pcmcia_bus_resume(skt);
1334 return -EIO;
1335 }
1336 return 0;
1337 }
1338
1339
1340 /*======================================================================
1341
1342 The card status event handler.
1343
1344 ======================================================================*/
1345
1346 /* Normally, the event is passed to individual drivers after
1347 * informing userspace. Only for CS_EVENT_CARD_REMOVAL this
1348 * is inversed to maintain historic compatibility.
1349 */
1350
1351 static int ds_event(struct pcmcia_socket *skt, event_t event, int priority)
1352 {
1353 struct pcmcia_socket *s = pcmcia_get_socket(skt);
1354
1355 if (!s) {
1356 dev_printk(KERN_ERR, &skt->dev,
1357 "PCMCIA obtaining reference to socket " \
1358 "failed, event 0x%x lost!\n", event);
1359 return -ENODEV;
1360 }
1361
1362 ds_dev_dbg(1, &skt->dev, "ds_event(0x%06x, %d, 0x%p)\n",
1363 event, priority, skt);
1364
1365 switch (event) {
1366 case CS_EVENT_CARD_REMOVAL:
1367 s->pcmcia_state.present = 0;
1368 pcmcia_card_remove(skt, NULL);
1369 handle_event(skt, event);
1370 break;
1371
1372 case CS_EVENT_CARD_INSERTION:
1373 s->pcmcia_state.present = 1;
1374 pcmcia_card_add(skt);
1375 handle_event(skt, event);
1376 break;
1377
1378 case CS_EVENT_EJECTION_REQUEST:
1379 break;
1380
1381 case CS_EVENT_PM_SUSPEND:
1382 case CS_EVENT_PM_RESUME:
1383 case CS_EVENT_RESET_PHYSICAL:
1384 case CS_EVENT_CARD_RESET:
1385 default:
1386 handle_event(skt, event);
1387 break;
1388 }
1389
1390 pcmcia_put_socket(s);
1391
1392 return 0;
1393 } /* ds_event */
1394
1395
1396 struct pcmcia_device * pcmcia_dev_present(struct pcmcia_device *_p_dev)
1397 {
1398 struct pcmcia_device *p_dev;
1399 struct pcmcia_device *ret = NULL;
1400
1401 p_dev = pcmcia_get_dev(_p_dev);
1402 if (!p_dev)
1403 return NULL;
1404
1405 if (!p_dev->socket->pcmcia_state.present)
1406 goto out;
1407
1408 if (p_dev->_removed)
1409 goto out;
1410
1411 if (p_dev->suspended)
1412 goto out;
1413
1414 ret = p_dev;
1415 out:
1416 pcmcia_put_dev(p_dev);
1417 return ret;
1418 }
1419 EXPORT_SYMBOL(pcmcia_dev_present);
1420
1421
1422 static struct pcmcia_callback pcmcia_bus_callback = {
1423 .owner = THIS_MODULE,
1424 .event = ds_event,
1425 .requery = pcmcia_bus_rescan,
1426 .suspend = pcmcia_bus_suspend,
1427 .resume = pcmcia_bus_resume,
1428 };
1429
1430 static int __devinit pcmcia_bus_add_socket(struct device *dev,
1431 struct class_interface *class_intf)
1432 {
1433 struct pcmcia_socket *socket = dev_get_drvdata(dev);
1434 int ret;
1435
1436 socket = pcmcia_get_socket(socket);
1437 if (!socket) {
1438 dev_printk(KERN_ERR, dev,
1439 "PCMCIA obtaining reference to socket failed\n");
1440 return -ENODEV;
1441 }
1442
1443 /*
1444 * Ugly. But we want to wait for the socket threads to have started up.
1445 * We really should let the drivers themselves drive some of this..
1446 */
1447 msleep(250);
1448
1449 #ifdef CONFIG_PCMCIA_IOCTL
1450 init_waitqueue_head(&socket->queue);
1451 #endif
1452 INIT_LIST_HEAD(&socket->devices_list);
1453 INIT_WORK(&socket->device_add, pcmcia_delayed_add_device);
1454 memset(&socket->pcmcia_state, 0, sizeof(u8));
1455 socket->device_count = 0;
1456
1457 ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback);
1458 if (ret) {
1459 dev_printk(KERN_ERR, dev, "PCMCIA registration failed\n");
1460 pcmcia_put_socket(socket);
1461 return (ret);
1462 }
1463
1464 return 0;
1465 }
1466
1467 static void pcmcia_bus_remove_socket(struct device *dev,
1468 struct class_interface *class_intf)
1469 {
1470 struct pcmcia_socket *socket = dev_get_drvdata(dev);
1471
1472 if (!socket)
1473 return;
1474
1475 socket->pcmcia_state.dead = 1;
1476 pccard_register_pcmcia(socket, NULL);
1477
1478 /* unregister any unbound devices */
1479 mutex_lock(&socket->skt_mutex);
1480 pcmcia_card_remove(socket, NULL);
1481 mutex_unlock(&socket->skt_mutex);
1482
1483 pcmcia_put_socket(socket);
1484
1485 return;
1486 }
1487
1488
1489 /* the pcmcia_bus_interface is used to handle pcmcia socket devices */
1490 static struct class_interface pcmcia_bus_interface __refdata = {
1491 .class = &pcmcia_socket_class,
1492 .add_dev = &pcmcia_bus_add_socket,
1493 .remove_dev = &pcmcia_bus_remove_socket,
1494 };
1495
1496
1497 struct bus_type pcmcia_bus_type = {
1498 .name = "pcmcia",
1499 .uevent = pcmcia_bus_uevent,
1500 .match = pcmcia_bus_match,
1501 .dev_attrs = pcmcia_dev_attrs,
1502 .probe = pcmcia_device_probe,
1503 .remove = pcmcia_device_remove,
1504 .suspend = pcmcia_dev_suspend,
1505 .resume = pcmcia_dev_resume,
1506 };
1507
1508
1509 static int __init init_pcmcia_bus(void)
1510 {
1511 int ret;
1512
1513 spin_lock_init(&pcmcia_dev_list_lock);
1514
1515 ret = bus_register(&pcmcia_bus_type);
1516 if (ret < 0) {
1517 printk(KERN_WARNING "pcmcia: bus_register error: %d\n", ret);
1518 return ret;
1519 }
1520 ret = class_interface_register(&pcmcia_bus_interface);
1521 if (ret < 0) {
1522 printk(KERN_WARNING
1523 "pcmcia: class_interface_register error: %d\n", ret);
1524 bus_unregister(&pcmcia_bus_type);
1525 return ret;
1526 }
1527
1528 pcmcia_setup_ioctl();
1529
1530 return 0;
1531 }
1532 fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that
1533 * pcmcia_socket_class is already registered */
1534
1535
1536 static void __exit exit_pcmcia_bus(void)
1537 {
1538 pcmcia_cleanup_ioctl();
1539
1540 class_interface_unregister(&pcmcia_bus_interface);
1541
1542 bus_unregister(&pcmcia_bus_type);
1543 }
1544 module_exit(exit_pcmcia_bus);
1545
1546
1547 MODULE_ALIAS("ds");
Support for the Chinese Samsung S3C2440 based development boards