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[PATCH] pcmcia: make pcmcia_release_{io,irq} static
[deliverable/linux.git] / drivers / pcmcia / ds.c
1 /*
2 * ds.c -- 16-bit PCMCIA core support
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
7 *
8 * The initial developer of the original code is David A. Hinds
9 * <dahinds@users.sourceforge.net>. Portions created by David A. Hinds
10 * are Copyright (C) 1999 David A. Hinds. All Rights Reserved.
11 *
12 * (C) 1999 David A. Hinds
13 * (C) 2003 - 2006 Dominik Brodowski
14 */
15
16 #include <linux/kernel.h>
17 #include <linux/module.h>
18 #include <linux/init.h>
19 #include <linux/errno.h>
20 #include <linux/list.h>
21 #include <linux/delay.h>
22 #include <linux/workqueue.h>
23 #include <linux/crc32.h>
24 #include <linux/firmware.h>
25 #include <linux/kref.h>
26
27 #define IN_CARD_SERVICES
28 #include <pcmcia/cs_types.h>
29 #include <pcmcia/cs.h>
30 #include <pcmcia/cistpl.h>
31 #include <pcmcia/ds.h>
32 #include <pcmcia/ss.h>
33
34 #include "cs_internal.h"
35 #include "ds_internal.h"
36
37 /*====================================================================*/
38
39 /* Module parameters */
40
41 MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
42 MODULE_DESCRIPTION("PCMCIA Driver Services");
43 MODULE_LICENSE("GPL");
44
45 #ifdef DEBUG
46 int ds_pc_debug;
47
48 module_param_named(pc_debug, ds_pc_debug, int, 0644);
49
50 #define ds_dbg(lvl, fmt, arg...) do { \
51 if (ds_pc_debug > (lvl)) \
52 printk(KERN_DEBUG "ds: " fmt , ## arg); \
53 } while (0)
54 #else
55 #define ds_dbg(lvl, fmt, arg...) do { } while (0)
56 #endif
57
58 spinlock_t pcmcia_dev_list_lock;
59
60 /*====================================================================*/
61
62 /* code which was in cs.c before */
63
64 /* String tables for error messages */
65
66 typedef struct lookup_t {
67 int key;
68 char *msg;
69 } lookup_t;
70
71 static const lookup_t error_table[] = {
72 { CS_SUCCESS, "Operation succeeded" },
73 { CS_BAD_ADAPTER, "Bad adapter" },
74 { CS_BAD_ATTRIBUTE, "Bad attribute", },
75 { CS_BAD_BASE, "Bad base address" },
76 { CS_BAD_EDC, "Bad EDC" },
77 { CS_BAD_IRQ, "Bad IRQ" },
78 { CS_BAD_OFFSET, "Bad offset" },
79 { CS_BAD_PAGE, "Bad page number" },
80 { CS_READ_FAILURE, "Read failure" },
81 { CS_BAD_SIZE, "Bad size" },
82 { CS_BAD_SOCKET, "Bad socket" },
83 { CS_BAD_TYPE, "Bad type" },
84 { CS_BAD_VCC, "Bad Vcc" },
85 { CS_BAD_VPP, "Bad Vpp" },
86 { CS_BAD_WINDOW, "Bad window" },
87 { CS_WRITE_FAILURE, "Write failure" },
88 { CS_NO_CARD, "No card present" },
89 { CS_UNSUPPORTED_FUNCTION, "Usupported function" },
90 { CS_UNSUPPORTED_MODE, "Unsupported mode" },
91 { CS_BAD_SPEED, "Bad speed" },
92 { CS_BUSY, "Resource busy" },
93 { CS_GENERAL_FAILURE, "General failure" },
94 { CS_WRITE_PROTECTED, "Write protected" },
95 { CS_BAD_ARG_LENGTH, "Bad argument length" },
96 { CS_BAD_ARGS, "Bad arguments" },
97 { CS_CONFIGURATION_LOCKED, "Configuration locked" },
98 { CS_IN_USE, "Resource in use" },
99 { CS_NO_MORE_ITEMS, "No more items" },
100 { CS_OUT_OF_RESOURCE, "Out of resource" },
101 { CS_BAD_HANDLE, "Bad handle" },
102 { CS_BAD_TUPLE, "Bad CIS tuple" }
103 };
104
105
106 static const lookup_t service_table[] = {
107 { AccessConfigurationRegister, "AccessConfigurationRegister" },
108 { AddSocketServices, "AddSocketServices" },
109 { AdjustResourceInfo, "AdjustResourceInfo" },
110 { CheckEraseQueue, "CheckEraseQueue" },
111 { CloseMemory, "CloseMemory" },
112 { DeregisterClient, "DeregisterClient" },
113 { DeregisterEraseQueue, "DeregisterEraseQueue" },
114 { GetCardServicesInfo, "GetCardServicesInfo" },
115 { GetClientInfo, "GetClientInfo" },
116 { GetConfigurationInfo, "GetConfigurationInfo" },
117 { GetEventMask, "GetEventMask" },
118 { GetFirstClient, "GetFirstClient" },
119 { GetFirstRegion, "GetFirstRegion" },
120 { GetFirstTuple, "GetFirstTuple" },
121 { GetNextClient, "GetNextClient" },
122 { GetNextRegion, "GetNextRegion" },
123 { GetNextTuple, "GetNextTuple" },
124 { GetStatus, "GetStatus" },
125 { GetTupleData, "GetTupleData" },
126 { MapMemPage, "MapMemPage" },
127 { ModifyConfiguration, "ModifyConfiguration" },
128 { ModifyWindow, "ModifyWindow" },
129 { OpenMemory, "OpenMemory" },
130 { ParseTuple, "ParseTuple" },
131 { ReadMemory, "ReadMemory" },
132 { RegisterClient, "RegisterClient" },
133 { RegisterEraseQueue, "RegisterEraseQueue" },
134 { RegisterMTD, "RegisterMTD" },
135 { ReleaseConfiguration, "ReleaseConfiguration" },
136 { ReleaseIO, "ReleaseIO" },
137 { ReleaseIRQ, "ReleaseIRQ" },
138 { ReleaseWindow, "ReleaseWindow" },
139 { RequestConfiguration, "RequestConfiguration" },
140 { RequestIO, "RequestIO" },
141 { RequestIRQ, "RequestIRQ" },
142 { RequestSocketMask, "RequestSocketMask" },
143 { RequestWindow, "RequestWindow" },
144 { ResetCard, "ResetCard" },
145 { SetEventMask, "SetEventMask" },
146 { ValidateCIS, "ValidateCIS" },
147 { WriteMemory, "WriteMemory" },
148 { BindDevice, "BindDevice" },
149 { BindMTD, "BindMTD" },
150 { ReportError, "ReportError" },
151 { SuspendCard, "SuspendCard" },
152 { ResumeCard, "ResumeCard" },
153 { EjectCard, "EjectCard" },
154 { InsertCard, "InsertCard" },
155 { ReplaceCIS, "ReplaceCIS" }
156 };
157
158
159 static int pcmcia_report_error(struct pcmcia_device *p_dev, error_info_t *err)
160 {
161 int i;
162 char *serv;
163
164 if (!p_dev)
165 printk(KERN_NOTICE);
166 else
167 printk(KERN_NOTICE "%s: ", p_dev->dev.bus_id);
168
169 for (i = 0; i < ARRAY_SIZE(service_table); i++)
170 if (service_table[i].key == err->func)
171 break;
172 if (i < ARRAY_SIZE(service_table))
173 serv = service_table[i].msg;
174 else
175 serv = "Unknown service number";
176
177 for (i = 0; i < ARRAY_SIZE(error_table); i++)
178 if (error_table[i].key == err->retcode)
179 break;
180 if (i < ARRAY_SIZE(error_table))
181 printk("%s: %s\n", serv, error_table[i].msg);
182 else
183 printk("%s: Unknown error code %#x\n", serv, err->retcode);
184
185 return CS_SUCCESS;
186 } /* report_error */
187
188 /* end of code which was in cs.c before */
189
190 /*======================================================================*/
191
192 void cs_error(struct pcmcia_device *p_dev, int func, int ret)
193 {
194 error_info_t err = { func, ret };
195 pcmcia_report_error(p_dev, &err);
196 }
197 EXPORT_SYMBOL(cs_error);
198
199
200 static void pcmcia_check_driver(struct pcmcia_driver *p_drv)
201 {
202 struct pcmcia_device_id *did = p_drv->id_table;
203 unsigned int i;
204 u32 hash;
205
206 if (!p_drv->probe || !p_drv->remove)
207 printk(KERN_DEBUG "pcmcia: %s lacks a requisite callback "
208 "function\n", p_drv->drv.name);
209
210 while (did && did->match_flags) {
211 for (i=0; i<4; i++) {
212 if (!did->prod_id[i])
213 continue;
214
215 hash = crc32(0, did->prod_id[i], strlen(did->prod_id[i]));
216 if (hash == did->prod_id_hash[i])
217 continue;
218
219 printk(KERN_DEBUG "pcmcia: %s: invalid hash for "
220 "product string \"%s\": is 0x%x, should "
221 "be 0x%x\n", p_drv->drv.name, did->prod_id[i],
222 did->prod_id_hash[i], hash);
223 printk(KERN_DEBUG "pcmcia: see "
224 "Documentation/pcmcia/devicetable.txt for "
225 "details\n");
226 }
227 did++;
228 }
229
230 return;
231 }
232
233
234 #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 p_dev->p_state &= ~CLIENT_UNBOUND;
394
395 ret = p_drv->probe(p_dev);
396 if (ret)
397 goto put_module;
398
399 /* handle pseudo multifunction devices:
400 * there are at most two pseudo multifunction devices.
401 * if we're matching against the first, schedule a
402 * call which will then check whether there are two
403 * pseudo devices, and if not, add the second one.
404 */
405 did = (struct pcmcia_device_id *) p_dev->dev.driver_data;
406 if (did && (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) &&
407 (p_dev->socket->device_count == 1) && (p_dev->device_no == 0))
408 pcmcia_add_pseudo_device(p_dev->socket);
409
410 put_module:
411 if (ret)
412 module_put(p_drv->owner);
413 put_dev:
414 if (ret)
415 put_device(dev);
416 return (ret);
417 }
418
419
420 static int pcmcia_device_remove(struct device * dev)
421 {
422 struct pcmcia_device *p_dev;
423 struct pcmcia_driver *p_drv;
424 int i;
425
426 /* detach the "instance" */
427 p_dev = to_pcmcia_dev(dev);
428 p_drv = to_pcmcia_drv(dev->driver);
429 if (!p_drv)
430 return 0;
431
432 if (p_drv->remove)
433 p_drv->remove(p_dev);
434
435 /* check for proper unloading */
436 if (p_dev->p_state & (CLIENT_IRQ_REQ|CLIENT_IO_REQ|CLIENT_CONFIG_LOCKED))
437 printk(KERN_INFO "pcmcia: driver %s did not release config properly\n",
438 p_drv->drv.name);
439
440 for (i = 0; i < MAX_WIN; i++)
441 if (p_dev->p_state & CLIENT_WIN_REQ(i))
442 printk(KERN_INFO "pcmcia: driver %s did not release windows properly\n",
443 p_drv->drv.name);
444
445 /* references from pcmcia_probe_device */
446 p_dev->p_state = CLIENT_UNBOUND;
447 pcmcia_put_dev(p_dev);
448 module_put(p_drv->owner);
449
450 return 0;
451 }
452
453
454 /*
455 * Removes a PCMCIA card from the device tree and socket list.
456 */
457 static void pcmcia_card_remove(struct pcmcia_socket *s)
458 {
459 struct pcmcia_device *p_dev;
460 unsigned long flags;
461
462 ds_dbg(2, "unbind_request(%d)\n", s->sock);
463
464 s->device_count = 0;
465
466 for (;;) {
467 /* unregister all pcmcia_devices registered with this socket*/
468 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
469 if (list_empty(&s->devices_list)) {
470 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
471 return;
472 }
473 p_dev = list_entry((&s->devices_list)->next, struct pcmcia_device, socket_device_list);
474 list_del(&p_dev->socket_device_list);
475 p_dev->p_state |= CLIENT_STALE;
476 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
477
478 device_unregister(&p_dev->dev);
479 }
480
481 return;
482 } /* unbind_request */
483
484
485 /*
486 * pcmcia_device_query -- determine information about a pcmcia device
487 */
488 static int pcmcia_device_query(struct pcmcia_device *p_dev)
489 {
490 cistpl_manfid_t manf_id;
491 cistpl_funcid_t func_id;
492 cistpl_vers_1_t *vers1;
493 unsigned int i;
494
495 vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL);
496 if (!vers1)
497 return -ENOMEM;
498
499 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
500 CISTPL_MANFID, &manf_id)) {
501 p_dev->manf_id = manf_id.manf;
502 p_dev->card_id = manf_id.card;
503 p_dev->has_manf_id = 1;
504 p_dev->has_card_id = 1;
505 }
506
507 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
508 CISTPL_FUNCID, &func_id)) {
509 p_dev->func_id = func_id.func;
510 p_dev->has_func_id = 1;
511 } else {
512 /* rule of thumb: cards with no FUNCID, but with
513 * common memory device geometry information, are
514 * probably memory cards (from pcmcia-cs) */
515 cistpl_device_geo_t *devgeo;
516
517 devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL);
518 if (!devgeo) {
519 kfree(vers1);
520 return -ENOMEM;
521 }
522 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
523 CISTPL_DEVICE_GEO, devgeo)) {
524 ds_dbg(0, "mem device geometry probably means "
525 "FUNCID_MEMORY\n");
526 p_dev->func_id = CISTPL_FUNCID_MEMORY;
527 p_dev->has_func_id = 1;
528 }
529 kfree(devgeo);
530 }
531
532 if (!pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_VERS_1,
533 vers1)) {
534 for (i=0; i < vers1->ns; i++) {
535 char *tmp;
536 unsigned int length;
537
538 tmp = vers1->str + vers1->ofs[i];
539
540 length = strlen(tmp) + 1;
541 if ((length < 2) || (length > 255))
542 continue;
543
544 p_dev->prod_id[i] = kmalloc(sizeof(char) * length,
545 GFP_KERNEL);
546 if (!p_dev->prod_id[i])
547 continue;
548
549 p_dev->prod_id[i] = strncpy(p_dev->prod_id[i],
550 tmp, length);
551 }
552 }
553
554 kfree(vers1);
555 return 0;
556 }
557
558
559 /* device_add_lock is needed to avoid double registration by cardmgr and kernel.
560 * Serializes pcmcia_device_add; will most likely be removed in future.
561 *
562 * While it has the caveat that adding new PCMCIA devices inside(!) device_register()
563 * won't work, this doesn't matter much at the moment: the driver core doesn't
564 * support it either.
565 */
566 static DEFINE_MUTEX(device_add_lock);
567
568 struct pcmcia_device * pcmcia_device_add(struct pcmcia_socket *s, unsigned int function)
569 {
570 struct pcmcia_device *p_dev, *tmp_dev;
571 unsigned long flags;
572 int bus_id_len;
573
574 s = pcmcia_get_socket(s);
575 if (!s)
576 return NULL;
577
578 mutex_lock(&device_add_lock);
579
580 /* max of 2 devices per card */
581 if (s->device_count == 2)
582 goto err_put;
583
584 p_dev = kzalloc(sizeof(struct pcmcia_device), GFP_KERNEL);
585 if (!p_dev)
586 goto err_put;
587
588 p_dev->socket = s;
589 p_dev->device_no = (s->device_count++);
590 p_dev->func = function;
591 if (s->functions <= function)
592 s->functions = function + 1;
593
594 p_dev->dev.bus = &pcmcia_bus_type;
595 p_dev->dev.parent = s->dev.dev;
596 p_dev->dev.release = pcmcia_release_dev;
597 bus_id_len = sprintf (p_dev->dev.bus_id, "%d.%d", p_dev->socket->sock, p_dev->device_no);
598
599 p_dev->devname = kmalloc(6 + bus_id_len + 1, GFP_KERNEL);
600 if (!p_dev->devname)
601 goto err_free;
602 sprintf (p_dev->devname, "pcmcia%s", p_dev->dev.bus_id);
603
604 /* compat */
605 p_dev->p_state = CLIENT_UNBOUND;
606
607
608 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
609
610 /*
611 * p_dev->function_config must be the same for all card functions.
612 * Note that this is serialized by the device_add_lock, so that
613 * only one such struct will be created.
614 */
615 list_for_each_entry(tmp_dev, &s->devices_list, socket_device_list)
616 if (p_dev->func == tmp_dev->func) {
617 p_dev->function_config = tmp_dev->function_config;
618 kref_get(&p_dev->function_config->ref);
619 }
620
621 /* Add to the list in pcmcia_bus_socket */
622 list_add_tail(&p_dev->socket_device_list, &s->devices_list);
623
624 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
625
626 if (!p_dev->function_config) {
627 p_dev->function_config = kzalloc(sizeof(struct config_t),
628 GFP_KERNEL);
629 if (!p_dev->function_config)
630 goto err_unreg;
631 kref_init(&p_dev->function_config->ref);
632 }
633
634 printk(KERN_NOTICE "pcmcia: registering new device %s\n",
635 p_dev->devname);
636
637 pcmcia_device_query(p_dev);
638
639 if (device_register(&p_dev->dev))
640 goto err_unreg;
641
642 mutex_unlock(&device_add_lock);
643
644 return p_dev;
645
646 err_unreg:
647 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
648 list_del(&p_dev->socket_device_list);
649 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
650
651 err_free:
652 kfree(p_dev->devname);
653 kfree(p_dev);
654 s->device_count--;
655 err_put:
656 mutex_unlock(&device_add_lock);
657 pcmcia_put_socket(s);
658
659 return NULL;
660 }
661
662
663 static int pcmcia_card_add(struct pcmcia_socket *s)
664 {
665 cisinfo_t cisinfo;
666 cistpl_longlink_mfc_t mfc;
667 unsigned int no_funcs, i;
668 int ret = 0;
669
670 if (!(s->resource_setup_done))
671 return -EAGAIN; /* try again, but later... */
672
673 if (pcmcia_validate_mem(s))
674 return -EAGAIN; /* try again, but later... */
675
676 ret = pccard_validate_cis(s, BIND_FN_ALL, &cisinfo);
677 if (ret || !cisinfo.Chains) {
678 ds_dbg(0, "invalid CIS or invalid resources\n");
679 return -ENODEV;
680 }
681
682 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
683 no_funcs = mfc.nfn;
684 else
685 no_funcs = 1;
686
687 for (i=0; i < no_funcs; i++)
688 pcmcia_device_add(s, i);
689
690 return (ret);
691 }
692
693
694 static void pcmcia_delayed_add_pseudo_device(void *data)
695 {
696 struct pcmcia_socket *s = data;
697 pcmcia_device_add(s, 0);
698 s->pcmcia_state.device_add_pending = 0;
699 }
700
701 static int pcmcia_requery(struct device *dev, void * _data)
702 {
703 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
704 if (!p_dev->dev.driver)
705 pcmcia_device_query(p_dev);
706
707 return 0;
708 }
709
710 static void pcmcia_bus_rescan(struct pcmcia_socket *skt)
711 {
712 int no_devices=0;
713 unsigned long flags;
714
715 /* must be called with skt_mutex held */
716 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
717 if (list_empty(&skt->devices_list))
718 no_devices=1;
719 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
720
721 /* if no devices were added for this socket yet because of
722 * missing resource information or other trouble, we need to
723 * do this now. */
724 if (no_devices) {
725 int ret = pcmcia_card_add(skt);
726 if (ret)
727 return;
728 }
729
730 /* some device information might have changed because of a CIS
731 * update or because we can finally read it correctly... so
732 * determine it again, overwriting old values if necessary. */
733 bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery);
734
735 /* we re-scan all devices, not just the ones connected to this
736 * socket. This does not matter, though. */
737 bus_rescan_devices(&pcmcia_bus_type);
738 }
739
740 static inline int pcmcia_devmatch(struct pcmcia_device *dev,
741 struct pcmcia_device_id *did)
742 {
743 if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
744 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
745 return 0;
746 }
747
748 if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
749 if ((!dev->has_card_id) || (dev->card_id != did->card_id))
750 return 0;
751 }
752
753 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
754 if (dev->func != did->function)
755 return 0;
756 }
757
758 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
759 if (!dev->prod_id[0])
760 return 0;
761 if (strcmp(did->prod_id[0], dev->prod_id[0]))
762 return 0;
763 }
764
765 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
766 if (!dev->prod_id[1])
767 return 0;
768 if (strcmp(did->prod_id[1], dev->prod_id[1]))
769 return 0;
770 }
771
772 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
773 if (!dev->prod_id[2])
774 return 0;
775 if (strcmp(did->prod_id[2], dev->prod_id[2]))
776 return 0;
777 }
778
779 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
780 if (!dev->prod_id[3])
781 return 0;
782 if (strcmp(did->prod_id[3], dev->prod_id[3]))
783 return 0;
784 }
785
786 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
787 if (dev->device_no != did->device_no)
788 return 0;
789 }
790
791 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
792 if ((!dev->has_func_id) || (dev->func_id != did->func_id))
793 return 0;
794
795 /* if this is a pseudo-multi-function device,
796 * we need explicit matches */
797 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO)
798 return 0;
799 if (dev->device_no)
800 return 0;
801
802 /* also, FUNC_ID matching needs to be activated by userspace
803 * after it has re-checked that there is no possible module
804 * with a prod_id/manf_id/card_id match.
805 */
806 if (!dev->allow_func_id_match)
807 return 0;
808 }
809
810 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
811 if (!dev->socket->fake_cis)
812 pcmcia_load_firmware(dev, did->cisfile);
813
814 if (!dev->socket->fake_cis)
815 return 0;
816 }
817
818 if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
819 int i;
820 for (i=0; i<4; i++)
821 if (dev->prod_id[i])
822 return 0;
823 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
824 return 0;
825 }
826
827 dev->dev.driver_data = (void *) did;
828
829 return 1;
830 }
831
832
833 static int pcmcia_bus_match(struct device * dev, struct device_driver * drv) {
834 struct pcmcia_device * p_dev = to_pcmcia_dev(dev);
835 struct pcmcia_driver * p_drv = to_pcmcia_drv(drv);
836 struct pcmcia_device_id *did = p_drv->id_table;
837
838 #ifdef CONFIG_PCMCIA_IOCTL
839 /* matching by cardmgr */
840 if (p_dev->cardmgr == p_drv)
841 return 1;
842 #endif
843
844 while (did && did->match_flags) {
845 if (pcmcia_devmatch(p_dev, did))
846 return 1;
847 did++;
848 }
849
850 return 0;
851 }
852
853 #ifdef CONFIG_HOTPLUG
854
855 static int pcmcia_bus_uevent(struct device *dev, char **envp, int num_envp,
856 char *buffer, int buffer_size)
857 {
858 struct pcmcia_device *p_dev;
859 int i, length = 0;
860 u32 hash[4] = { 0, 0, 0, 0};
861
862 if (!dev)
863 return -ENODEV;
864
865 p_dev = to_pcmcia_dev(dev);
866
867 /* calculate hashes */
868 for (i=0; i<4; i++) {
869 if (!p_dev->prod_id[i])
870 continue;
871 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
872 }
873
874 i = 0;
875
876 if (add_uevent_var(envp, num_envp, &i,
877 buffer, buffer_size, &length,
878 "SOCKET_NO=%u",
879 p_dev->socket->sock))
880 return -ENOMEM;
881
882 if (add_uevent_var(envp, num_envp, &i,
883 buffer, buffer_size, &length,
884 "DEVICE_NO=%02X",
885 p_dev->device_no))
886 return -ENOMEM;
887
888 if (add_uevent_var(envp, num_envp, &i,
889 buffer, buffer_size, &length,
890 "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
891 "pa%08Xpb%08Xpc%08Xpd%08X",
892 p_dev->has_manf_id ? p_dev->manf_id : 0,
893 p_dev->has_card_id ? p_dev->card_id : 0,
894 p_dev->has_func_id ? p_dev->func_id : 0,
895 p_dev->func,
896 p_dev->device_no,
897 hash[0],
898 hash[1],
899 hash[2],
900 hash[3]))
901 return -ENOMEM;
902
903 envp[i] = NULL;
904
905 return 0;
906 }
907
908 #else
909
910 static int pcmcia_bus_uevent(struct device *dev, char **envp, int num_envp,
911 char *buffer, int buffer_size)
912 {
913 return -ENODEV;
914 }
915
916 #endif
917
918 /************************ per-device sysfs output ***************************/
919
920 #define pcmcia_device_attr(field, test, format) \
921 static ssize_t field##_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->test ? sprintf (buf, format, p_dev->field) : -ENODEV; \
925 }
926
927 #define pcmcia_device_stringattr(name, field) \
928 static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf) \
929 { \
930 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
931 return p_dev->field ? sprintf (buf, "%s\n", p_dev->field) : -ENODEV; \
932 }
933
934 pcmcia_device_attr(func, socket, "0x%02x\n");
935 pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
936 pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
937 pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
938 pcmcia_device_stringattr(prod_id1, prod_id[0]);
939 pcmcia_device_stringattr(prod_id2, prod_id[1]);
940 pcmcia_device_stringattr(prod_id3, prod_id[2]);
941 pcmcia_device_stringattr(prod_id4, prod_id[3]);
942
943
944 static ssize_t pcmcia_show_pm_state(struct device *dev, struct device_attribute *attr, char *buf)
945 {
946 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
947
948 if (p_dev->dev.power.power_state.event != PM_EVENT_ON)
949 return sprintf(buf, "off\n");
950 else
951 return sprintf(buf, "on\n");
952 }
953
954 static ssize_t pcmcia_store_pm_state(struct device *dev, struct device_attribute *attr,
955 const char *buf, size_t count)
956 {
957 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
958 int ret = 0;
959
960 if (!count)
961 return -EINVAL;
962
963 if ((p_dev->dev.power.power_state.event == PM_EVENT_ON) &&
964 (!strncmp(buf, "off", 3)))
965 ret = dpm_runtime_suspend(dev, PMSG_SUSPEND);
966 else if ((p_dev->dev.power.power_state.event != PM_EVENT_ON) &&
967 (!strncmp(buf, "on", 2)))
968 dpm_runtime_resume(dev);
969
970 return ret ? ret : count;
971 }
972
973
974 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
975 {
976 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
977 int i;
978 u32 hash[4] = { 0, 0, 0, 0};
979
980 /* calculate hashes */
981 for (i=0; i<4; i++) {
982 if (!p_dev->prod_id[i])
983 continue;
984 hash[i] = crc32(0,p_dev->prod_id[i],strlen(p_dev->prod_id[i]));
985 }
986 return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
987 "pa%08Xpb%08Xpc%08Xpd%08X\n",
988 p_dev->has_manf_id ? p_dev->manf_id : 0,
989 p_dev->has_card_id ? p_dev->card_id : 0,
990 p_dev->has_func_id ? p_dev->func_id : 0,
991 p_dev->func, p_dev->device_no,
992 hash[0], hash[1], hash[2], hash[3]);
993 }
994
995 static ssize_t pcmcia_store_allow_func_id_match(struct device *dev,
996 struct device_attribute *attr, const char *buf, size_t count)
997 {
998 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
999
1000 if (!count)
1001 return -EINVAL;
1002
1003 mutex_lock(&p_dev->socket->skt_mutex);
1004 p_dev->allow_func_id_match = 1;
1005 mutex_unlock(&p_dev->socket->skt_mutex);
1006
1007 bus_rescan_devices(&pcmcia_bus_type);
1008
1009 return count;
1010 }
1011
1012 static struct device_attribute pcmcia_dev_attrs[] = {
1013 __ATTR(function, 0444, func_show, NULL),
1014 __ATTR(pm_state, 0644, pcmcia_show_pm_state, pcmcia_store_pm_state),
1015 __ATTR_RO(func_id),
1016 __ATTR_RO(manf_id),
1017 __ATTR_RO(card_id),
1018 __ATTR_RO(prod_id1),
1019 __ATTR_RO(prod_id2),
1020 __ATTR_RO(prod_id3),
1021 __ATTR_RO(prod_id4),
1022 __ATTR_RO(modalias),
1023 __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match),
1024 __ATTR_NULL,
1025 };
1026
1027 /* PM support, also needed for reset */
1028
1029 static int pcmcia_dev_suspend(struct device * dev, pm_message_t state)
1030 {
1031 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1032 struct pcmcia_driver *p_drv = NULL;
1033 int ret;
1034
1035 if (dev->driver)
1036 p_drv = to_pcmcia_drv(dev->driver);
1037
1038 if (p_drv && p_drv->suspend) {
1039 ret = p_drv->suspend(p_dev);
1040 if (ret)
1041 return ret;
1042 p_dev->state |= DEV_SUSPEND;
1043 if ((p_dev->state & DEV_CONFIG) &&
1044 !(p_dev->state & DEV_SUSPEND_NORELEASE))
1045 pcmcia_release_configuration(p_dev);
1046 }
1047
1048 return 0;
1049 }
1050
1051
1052 static int pcmcia_dev_resume(struct device * dev)
1053 {
1054 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1055 struct pcmcia_driver *p_drv = NULL;
1056 int ret;
1057
1058 if (dev->driver)
1059 p_drv = to_pcmcia_drv(dev->driver);
1060
1061 if (p_drv && p_drv->resume) {
1062 p_dev->state &= ~DEV_SUSPEND;
1063 if ((p_dev->state & DEV_CONFIG) &&
1064 !(p_dev->state & DEV_SUSPEND_NORELEASE)){
1065 ret = pcmcia_request_configuration(p_dev,
1066 &p_dev->conf);
1067 if (ret)
1068 return ret;
1069 }
1070 return p_drv->resume(p_dev);
1071 }
1072
1073 return 0;
1074 }
1075
1076
1077 static int pcmcia_bus_suspend_callback(struct device *dev, void * _data)
1078 {
1079 struct pcmcia_socket *skt = _data;
1080 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1081
1082 if (p_dev->socket != skt)
1083 return 0;
1084
1085 return dpm_runtime_suspend(dev, PMSG_SUSPEND);
1086 }
1087
1088 static int pcmcia_bus_resume_callback(struct device *dev, void * _data)
1089 {
1090 struct pcmcia_socket *skt = _data;
1091 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1092
1093 if (p_dev->socket != skt)
1094 return 0;
1095
1096 dpm_runtime_resume(dev);
1097
1098 return 0;
1099 }
1100
1101 static int pcmcia_bus_resume(struct pcmcia_socket *skt)
1102 {
1103 bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback);
1104 return 0;
1105 }
1106
1107 static int pcmcia_bus_suspend(struct pcmcia_socket *skt)
1108 {
1109 if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt,
1110 pcmcia_bus_suspend_callback)) {
1111 pcmcia_bus_resume(skt);
1112 return -EIO;
1113 }
1114 return 0;
1115 }
1116
1117
1118 /*======================================================================
1119
1120 The card status event handler.
1121
1122 ======================================================================*/
1123
1124 /* Normally, the event is passed to individual drivers after
1125 * informing userspace. Only for CS_EVENT_CARD_REMOVAL this
1126 * is inversed to maintain historic compatibility.
1127 */
1128
1129 static int ds_event(struct pcmcia_socket *skt, event_t event, int priority)
1130 {
1131 struct pcmcia_socket *s = pcmcia_get_socket(skt);
1132
1133 ds_dbg(1, "ds_event(0x%06x, %d, 0x%p)\n",
1134 event, priority, skt);
1135
1136 switch (event) {
1137 case CS_EVENT_CARD_REMOVAL:
1138 s->pcmcia_state.present = 0;
1139 pcmcia_card_remove(skt);
1140 handle_event(skt, event);
1141 break;
1142
1143 case CS_EVENT_CARD_INSERTION:
1144 s->pcmcia_state.present = 1;
1145 pcmcia_card_add(skt);
1146 handle_event(skt, event);
1147 break;
1148
1149 case CS_EVENT_EJECTION_REQUEST:
1150 break;
1151
1152 case CS_EVENT_PM_SUSPEND:
1153 case CS_EVENT_PM_RESUME:
1154 case CS_EVENT_RESET_PHYSICAL:
1155 case CS_EVENT_CARD_RESET:
1156 default:
1157 handle_event(skt, event);
1158 break;
1159 }
1160
1161 pcmcia_put_socket(s);
1162
1163 return 0;
1164 } /* ds_event */
1165
1166
1167 static struct pcmcia_callback pcmcia_bus_callback = {
1168 .owner = THIS_MODULE,
1169 .event = ds_event,
1170 .requery = pcmcia_bus_rescan,
1171 .suspend = pcmcia_bus_suspend,
1172 .resume = pcmcia_bus_resume,
1173 };
1174
1175 static int __devinit pcmcia_bus_add_socket(struct class_device *class_dev,
1176 struct class_interface *class_intf)
1177 {
1178 struct pcmcia_socket *socket = class_get_devdata(class_dev);
1179 int ret;
1180
1181 socket = pcmcia_get_socket(socket);
1182 if (!socket) {
1183 printk(KERN_ERR "PCMCIA obtaining reference to socket %p failed\n", socket);
1184 return -ENODEV;
1185 }
1186
1187 /*
1188 * Ugly. But we want to wait for the socket threads to have started up.
1189 * We really should let the drivers themselves drive some of this..
1190 */
1191 msleep(250);
1192
1193 #ifdef CONFIG_PCMCIA_IOCTL
1194 init_waitqueue_head(&socket->queue);
1195 #endif
1196 INIT_LIST_HEAD(&socket->devices_list);
1197 INIT_WORK(&socket->device_add, pcmcia_delayed_add_pseudo_device, socket);
1198 memset(&socket->pcmcia_state, 0, sizeof(u8));
1199 socket->device_count = 0;
1200
1201 ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback);
1202 if (ret) {
1203 printk(KERN_ERR "PCMCIA registration PCCard core failed for socket %p\n", socket);
1204 pcmcia_put_socket(socket);
1205 return (ret);
1206 }
1207
1208 return 0;
1209 }
1210
1211 static void pcmcia_bus_remove_socket(struct class_device *class_dev,
1212 struct class_interface *class_intf)
1213 {
1214 struct pcmcia_socket *socket = class_get_devdata(class_dev);
1215
1216 if (!socket)
1217 return;
1218
1219 socket->pcmcia_state.dead = 1;
1220 pccard_register_pcmcia(socket, NULL);
1221
1222 pcmcia_put_socket(socket);
1223
1224 return;
1225 }
1226
1227
1228 /* the pcmcia_bus_interface is used to handle pcmcia socket devices */
1229 static struct class_interface pcmcia_bus_interface = {
1230 .class = &pcmcia_socket_class,
1231 .add = &pcmcia_bus_add_socket,
1232 .remove = &pcmcia_bus_remove_socket,
1233 };
1234
1235
1236 struct bus_type pcmcia_bus_type = {
1237 .name = "pcmcia",
1238 .uevent = pcmcia_bus_uevent,
1239 .match = pcmcia_bus_match,
1240 .dev_attrs = pcmcia_dev_attrs,
1241 .probe = pcmcia_device_probe,
1242 .remove = pcmcia_device_remove,
1243 .suspend = pcmcia_dev_suspend,
1244 .resume = pcmcia_dev_resume,
1245 };
1246
1247
1248 static int __init init_pcmcia_bus(void)
1249 {
1250 spin_lock_init(&pcmcia_dev_list_lock);
1251
1252 bus_register(&pcmcia_bus_type);
1253 class_interface_register(&pcmcia_bus_interface);
1254
1255 pcmcia_setup_ioctl();
1256
1257 return 0;
1258 }
1259 fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that
1260 * pcmcia_socket_class is already registered */
1261
1262
1263 static void __exit exit_pcmcia_bus(void)
1264 {
1265 pcmcia_cleanup_ioctl();
1266
1267 class_interface_unregister(&pcmcia_bus_interface);
1268
1269 bus_unregister(&pcmcia_bus_type);
1270 }
1271 module_exit(exit_pcmcia_bus);
1272
1273
1274 MODULE_ALIAS("ds");
Linux kernel - Deliverables
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