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[PATCH] pcmcia: embed dev_link_t into struct pcmcia_device
[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 p_dev->handle = p_dev;
395
396 ret = p_drv->probe(p_dev);
397 if (ret)
398 goto put_module;
399
400 /* handle pseudo multifunction devices:
401 * there are at most two pseudo multifunction devices.
402 * if we're matching against the first, schedule a
403 * call which will then check whether there are two
404 * pseudo devices, and if not, add the second one.
405 */
406 did = (struct pcmcia_device_id *) p_dev->dev.driver_data;
407 if (did && (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) &&
408 (p_dev->socket->device_count == 1) && (p_dev->device_no == 0))
409 pcmcia_add_pseudo_device(p_dev->socket);
410
411 put_module:
412 if (ret)
413 module_put(p_drv->owner);
414 put_dev:
415 if (ret)
416 put_device(dev);
417 return (ret);
418 }
419
420
421 static int pcmcia_device_remove(struct device * dev)
422 {
423 struct pcmcia_device *p_dev;
424 struct pcmcia_driver *p_drv;
425 int i;
426
427 /* detach the "instance" */
428 p_dev = to_pcmcia_dev(dev);
429 p_drv = to_pcmcia_drv(dev->driver);
430 if (!p_drv)
431 return 0;
432
433 if (p_drv->remove)
434 p_drv->remove(p_dev);
435
436 /* check for proper unloading */
437 if (p_dev->p_state & (CLIENT_IRQ_REQ|CLIENT_IO_REQ|CLIENT_CONFIG_LOCKED))
438 printk(KERN_INFO "pcmcia: driver %s did not release config properly\n",
439 p_drv->drv.name);
440
441 for (i = 0; i < MAX_WIN; i++)
442 if (p_dev->p_state & CLIENT_WIN_REQ(i))
443 printk(KERN_INFO "pcmcia: driver %s did not release windows properly\n",
444 p_drv->drv.name);
445
446 /* references from pcmcia_probe_device */
447 p_dev->p_state = CLIENT_UNBOUND;
448 pcmcia_put_dev(p_dev);
449 module_put(p_drv->owner);
450
451 return 0;
452 }
453
454
455 /*
456 * Removes a PCMCIA card from the device tree and socket list.
457 */
458 static void pcmcia_card_remove(struct pcmcia_socket *s)
459 {
460 struct pcmcia_device *p_dev;
461 unsigned long flags;
462
463 ds_dbg(2, "unbind_request(%d)\n", s->sock);
464
465 s->device_count = 0;
466
467 for (;;) {
468 /* unregister all pcmcia_devices registered with this socket*/
469 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
470 if (list_empty(&s->devices_list)) {
471 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
472 return;
473 }
474 p_dev = list_entry((&s->devices_list)->next, struct pcmcia_device, socket_device_list);
475 list_del(&p_dev->socket_device_list);
476 p_dev->p_state |= CLIENT_STALE;
477 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
478
479 device_unregister(&p_dev->dev);
480 }
481
482 return;
483 } /* unbind_request */
484
485
486 /*
487 * pcmcia_device_query -- determine information about a pcmcia device
488 */
489 static int pcmcia_device_query(struct pcmcia_device *p_dev)
490 {
491 cistpl_manfid_t manf_id;
492 cistpl_funcid_t func_id;
493 cistpl_vers_1_t *vers1;
494 unsigned int i;
495
496 vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL);
497 if (!vers1)
498 return -ENOMEM;
499
500 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
501 CISTPL_MANFID, &manf_id)) {
502 p_dev->manf_id = manf_id.manf;
503 p_dev->card_id = manf_id.card;
504 p_dev->has_manf_id = 1;
505 p_dev->has_card_id = 1;
506 }
507
508 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
509 CISTPL_FUNCID, &func_id)) {
510 p_dev->func_id = func_id.func;
511 p_dev->has_func_id = 1;
512 } else {
513 /* rule of thumb: cards with no FUNCID, but with
514 * common memory device geometry information, are
515 * probably memory cards (from pcmcia-cs) */
516 cistpl_device_geo_t *devgeo;
517
518 devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL);
519 if (!devgeo) {
520 kfree(vers1);
521 return -ENOMEM;
522 }
523 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
524 CISTPL_DEVICE_GEO, devgeo)) {
525 ds_dbg(0, "mem device geometry probably means "
526 "FUNCID_MEMORY\n");
527 p_dev->func_id = CISTPL_FUNCID_MEMORY;
528 p_dev->has_func_id = 1;
529 }
530 kfree(devgeo);
531 }
532
533 if (!pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_VERS_1,
534 vers1)) {
535 for (i=0; i < vers1->ns; i++) {
536 char *tmp;
537 unsigned int length;
538
539 tmp = vers1->str + vers1->ofs[i];
540
541 length = strlen(tmp) + 1;
542 if ((length < 2) || (length > 255))
543 continue;
544
545 p_dev->prod_id[i] = kmalloc(sizeof(char) * length,
546 GFP_KERNEL);
547 if (!p_dev->prod_id[i])
548 continue;
549
550 p_dev->prod_id[i] = strncpy(p_dev->prod_id[i],
551 tmp, length);
552 }
553 }
554
555 kfree(vers1);
556 return 0;
557 }
558
559
560 /* device_add_lock is needed to avoid double registration by cardmgr and kernel.
561 * Serializes pcmcia_device_add; will most likely be removed in future.
562 *
563 * While it has the caveat that adding new PCMCIA devices inside(!) device_register()
564 * won't work, this doesn't matter much at the moment: the driver core doesn't
565 * support it either.
566 */
567 static DEFINE_MUTEX(device_add_lock);
568
569 struct pcmcia_device * pcmcia_device_add(struct pcmcia_socket *s, unsigned int function)
570 {
571 struct pcmcia_device *p_dev, *tmp_dev;
572 unsigned long flags;
573 int bus_id_len;
574
575 s = pcmcia_get_socket(s);
576 if (!s)
577 return NULL;
578
579 mutex_lock(&device_add_lock);
580
581 /* max of 2 devices per card */
582 if (s->device_count == 2)
583 goto err_put;
584
585 p_dev = kzalloc(sizeof(struct pcmcia_device), GFP_KERNEL);
586 if (!p_dev)
587 goto err_put;
588
589 p_dev->socket = s;
590 p_dev->device_no = (s->device_count++);
591 p_dev->func = function;
592 if (s->functions <= function)
593 s->functions = function + 1;
594
595 p_dev->dev.bus = &pcmcia_bus_type;
596 p_dev->dev.parent = s->dev.dev;
597 p_dev->dev.release = pcmcia_release_dev;
598 bus_id_len = sprintf (p_dev->dev.bus_id, "%d.%d", p_dev->socket->sock, p_dev->device_no);
599
600 p_dev->devname = kmalloc(6 + bus_id_len + 1, GFP_KERNEL);
601 if (!p_dev->devname)
602 goto err_free;
603 sprintf (p_dev->devname, "pcmcia%s", p_dev->dev.bus_id);
604
605 /* compat */
606 p_dev->p_state = CLIENT_UNBOUND;
607
608
609 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
610
611 /*
612 * p_dev->function_config must be the same for all card functions.
613 * Note that this is serialized by the device_add_lock, so that
614 * only one such struct will be created.
615 */
616 list_for_each_entry(tmp_dev, &s->devices_list, socket_device_list)
617 if (p_dev->func == tmp_dev->func) {
618 p_dev->function_config = tmp_dev->function_config;
619 kref_get(&p_dev->function_config->ref);
620 }
621
622 /* Add to the list in pcmcia_bus_socket */
623 list_add_tail(&p_dev->socket_device_list, &s->devices_list);
624
625 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
626
627 if (!p_dev->function_config) {
628 p_dev->function_config = kzalloc(sizeof(struct config_t),
629 GFP_KERNEL);
630 if (!p_dev->function_config)
631 goto err_unreg;
632 kref_init(&p_dev->function_config->ref);
633 }
634
635 printk(KERN_NOTICE "pcmcia: registering new device %s\n",
636 p_dev->devname);
637
638 pcmcia_device_query(p_dev);
639
640 if (device_register(&p_dev->dev))
641 goto err_unreg;
642
643 mutex_unlock(&device_add_lock);
644
645 return p_dev;
646
647 err_unreg:
648 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
649 list_del(&p_dev->socket_device_list);
650 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
651
652 err_free:
653 kfree(p_dev->devname);
654 kfree(p_dev);
655 s->device_count--;
656 err_put:
657 mutex_unlock(&device_add_lock);
658 pcmcia_put_socket(s);
659
660 return NULL;
661 }
662
663
664 static int pcmcia_card_add(struct pcmcia_socket *s)
665 {
666 cisinfo_t cisinfo;
667 cistpl_longlink_mfc_t mfc;
668 unsigned int no_funcs, i;
669 int ret = 0;
670
671 if (!(s->resource_setup_done))
672 return -EAGAIN; /* try again, but later... */
673
674 if (pcmcia_validate_mem(s))
675 return -EAGAIN; /* try again, but later... */
676
677 ret = pccard_validate_cis(s, BIND_FN_ALL, &cisinfo);
678 if (ret || !cisinfo.Chains) {
679 ds_dbg(0, "invalid CIS or invalid resources\n");
680 return -ENODEV;
681 }
682
683 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
684 no_funcs = mfc.nfn;
685 else
686 no_funcs = 1;
687
688 for (i=0; i < no_funcs; i++)
689 pcmcia_device_add(s, i);
690
691 return (ret);
692 }
693
694
695 static void pcmcia_delayed_add_pseudo_device(void *data)
696 {
697 struct pcmcia_socket *s = data;
698 pcmcia_device_add(s, 0);
699 s->pcmcia_state.device_add_pending = 0;
700 }
701
702 static int pcmcia_requery(struct device *dev, void * _data)
703 {
704 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
705 if (!p_dev->dev.driver)
706 pcmcia_device_query(p_dev);
707
708 return 0;
709 }
710
711 static void pcmcia_bus_rescan(struct pcmcia_socket *skt)
712 {
713 int no_devices=0;
714 unsigned long flags;
715
716 /* must be called with skt_mutex held */
717 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
718 if (list_empty(&skt->devices_list))
719 no_devices=1;
720 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
721
722 /* if no devices were added for this socket yet because of
723 * missing resource information or other trouble, we need to
724 * do this now. */
725 if (no_devices) {
726 int ret = pcmcia_card_add(skt);
727 if (ret)
728 return;
729 }
730
731 /* some device information might have changed because of a CIS
732 * update or because we can finally read it correctly... so
733 * determine it again, overwriting old values if necessary. */
734 bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery);
735
736 /* we re-scan all devices, not just the ones connected to this
737 * socket. This does not matter, though. */
738 bus_rescan_devices(&pcmcia_bus_type);
739 }
740
741 static inline int pcmcia_devmatch(struct pcmcia_device *dev,
742 struct pcmcia_device_id *did)
743 {
744 if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
745 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
746 return 0;
747 }
748
749 if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
750 if ((!dev->has_card_id) || (dev->card_id != did->card_id))
751 return 0;
752 }
753
754 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
755 if (dev->func != did->function)
756 return 0;
757 }
758
759 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
760 if (!dev->prod_id[0])
761 return 0;
762 if (strcmp(did->prod_id[0], dev->prod_id[0]))
763 return 0;
764 }
765
766 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
767 if (!dev->prod_id[1])
768 return 0;
769 if (strcmp(did->prod_id[1], dev->prod_id[1]))
770 return 0;
771 }
772
773 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
774 if (!dev->prod_id[2])
775 return 0;
776 if (strcmp(did->prod_id[2], dev->prod_id[2]))
777 return 0;
778 }
779
780 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
781 if (!dev->prod_id[3])
782 return 0;
783 if (strcmp(did->prod_id[3], dev->prod_id[3]))
784 return 0;
785 }
786
787 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
788 if (dev->device_no != did->device_no)
789 return 0;
790 }
791
792 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
793 if ((!dev->has_func_id) || (dev->func_id != did->func_id))
794 return 0;
795
796 /* if this is a pseudo-multi-function device,
797 * we need explicit matches */
798 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO)
799 return 0;
800 if (dev->device_no)
801 return 0;
802
803 /* also, FUNC_ID matching needs to be activated by userspace
804 * after it has re-checked that there is no possible module
805 * with a prod_id/manf_id/card_id match.
806 */
807 if (!dev->allow_func_id_match)
808 return 0;
809 }
810
811 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
812 if (!dev->socket->fake_cis)
813 pcmcia_load_firmware(dev, did->cisfile);
814
815 if (!dev->socket->fake_cis)
816 return 0;
817 }
818
819 if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
820 int i;
821 for (i=0; i<4; i++)
822 if (dev->prod_id[i])
823 return 0;
824 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
825 return 0;
826 }
827
828 dev->dev.driver_data = (void *) did;
829
830 return 1;
831 }
832
833
834 static int pcmcia_bus_match(struct device * dev, struct device_driver * drv) {
835 struct pcmcia_device * p_dev = to_pcmcia_dev(dev);
836 struct pcmcia_driver * p_drv = to_pcmcia_drv(drv);
837 struct pcmcia_device_id *did = p_drv->id_table;
838
839 #ifdef CONFIG_PCMCIA_IOCTL
840 /* matching by cardmgr */
841 if (p_dev->cardmgr == p_drv)
842 return 1;
843 #endif
844
845 while (did && did->match_flags) {
846 if (pcmcia_devmatch(p_dev, did))
847 return 1;
848 did++;
849 }
850
851 return 0;
852 }
853
854 #ifdef CONFIG_HOTPLUG
855
856 static int pcmcia_bus_uevent(struct device *dev, char **envp, int num_envp,
857 char *buffer, int buffer_size)
858 {
859 struct pcmcia_device *p_dev;
860 int i, length = 0;
861 u32 hash[4] = { 0, 0, 0, 0};
862
863 if (!dev)
864 return -ENODEV;
865
866 p_dev = to_pcmcia_dev(dev);
867
868 /* calculate hashes */
869 for (i=0; i<4; i++) {
870 if (!p_dev->prod_id[i])
871 continue;
872 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
873 }
874
875 i = 0;
876
877 if (add_uevent_var(envp, num_envp, &i,
878 buffer, buffer_size, &length,
879 "SOCKET_NO=%u",
880 p_dev->socket->sock))
881 return -ENOMEM;
882
883 if (add_uevent_var(envp, num_envp, &i,
884 buffer, buffer_size, &length,
885 "DEVICE_NO=%02X",
886 p_dev->device_no))
887 return -ENOMEM;
888
889 if (add_uevent_var(envp, num_envp, &i,
890 buffer, buffer_size, &length,
891 "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
892 "pa%08Xpb%08Xpc%08Xpd%08X",
893 p_dev->has_manf_id ? p_dev->manf_id : 0,
894 p_dev->has_card_id ? p_dev->card_id : 0,
895 p_dev->has_func_id ? p_dev->func_id : 0,
896 p_dev->func,
897 p_dev->device_no,
898 hash[0],
899 hash[1],
900 hash[2],
901 hash[3]))
902 return -ENOMEM;
903
904 envp[i] = NULL;
905
906 return 0;
907 }
908
909 #else
910
911 static int pcmcia_bus_uevent(struct device *dev, char **envp, int num_envp,
912 char *buffer, int buffer_size)
913 {
914 return -ENODEV;
915 }
916
917 #endif
918
919 /************************ per-device sysfs output ***************************/
920
921 #define pcmcia_device_attr(field, test, format) \
922 static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf) \
923 { \
924 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
925 return p_dev->test ? sprintf (buf, format, p_dev->field) : -ENODEV; \
926 }
927
928 #define pcmcia_device_stringattr(name, field) \
929 static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf) \
930 { \
931 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
932 return p_dev->field ? sprintf (buf, "%s\n", p_dev->field) : -ENODEV; \
933 }
934
935 pcmcia_device_attr(func, socket, "0x%02x\n");
936 pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
937 pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
938 pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
939 pcmcia_device_stringattr(prod_id1, prod_id[0]);
940 pcmcia_device_stringattr(prod_id2, prod_id[1]);
941 pcmcia_device_stringattr(prod_id3, prod_id[2]);
942 pcmcia_device_stringattr(prod_id4, prod_id[3]);
943
944
945 static ssize_t pcmcia_show_pm_state(struct device *dev, struct device_attribute *attr, char *buf)
946 {
947 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
948
949 if (p_dev->dev.power.power_state.event != PM_EVENT_ON)
950 return sprintf(buf, "off\n");
951 else
952 return sprintf(buf, "on\n");
953 }
954
955 static ssize_t pcmcia_store_pm_state(struct device *dev, struct device_attribute *attr,
956 const char *buf, size_t count)
957 {
958 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
959 int ret = 0;
960
961 if (!count)
962 return -EINVAL;
963
964 if ((p_dev->dev.power.power_state.event == PM_EVENT_ON) &&
965 (!strncmp(buf, "off", 3)))
966 ret = dpm_runtime_suspend(dev, PMSG_SUSPEND);
967 else if ((p_dev->dev.power.power_state.event != PM_EVENT_ON) &&
968 (!strncmp(buf, "on", 2)))
969 dpm_runtime_resume(dev);
970
971 return ret ? ret : count;
972 }
973
974
975 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
976 {
977 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
978 int i;
979 u32 hash[4] = { 0, 0, 0, 0};
980
981 /* calculate hashes */
982 for (i=0; i<4; i++) {
983 if (!p_dev->prod_id[i])
984 continue;
985 hash[i] = crc32(0,p_dev->prod_id[i],strlen(p_dev->prod_id[i]));
986 }
987 return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
988 "pa%08Xpb%08Xpc%08Xpd%08X\n",
989 p_dev->has_manf_id ? p_dev->manf_id : 0,
990 p_dev->has_card_id ? p_dev->card_id : 0,
991 p_dev->has_func_id ? p_dev->func_id : 0,
992 p_dev->func, p_dev->device_no,
993 hash[0], hash[1], hash[2], hash[3]);
994 }
995
996 static ssize_t pcmcia_store_allow_func_id_match(struct device *dev,
997 struct device_attribute *attr, const char *buf, size_t count)
998 {
999 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1000
1001 if (!count)
1002 return -EINVAL;
1003
1004 mutex_lock(&p_dev->socket->skt_mutex);
1005 p_dev->allow_func_id_match = 1;
1006 mutex_unlock(&p_dev->socket->skt_mutex);
1007
1008 bus_rescan_devices(&pcmcia_bus_type);
1009
1010 return count;
1011 }
1012
1013 static struct device_attribute pcmcia_dev_attrs[] = {
1014 __ATTR(function, 0444, func_show, NULL),
1015 __ATTR(pm_state, 0644, pcmcia_show_pm_state, pcmcia_store_pm_state),
1016 __ATTR_RO(func_id),
1017 __ATTR_RO(manf_id),
1018 __ATTR_RO(card_id),
1019 __ATTR_RO(prod_id1),
1020 __ATTR_RO(prod_id2),
1021 __ATTR_RO(prod_id3),
1022 __ATTR_RO(prod_id4),
1023 __ATTR_RO(modalias),
1024 __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match),
1025 __ATTR_NULL,
1026 };
1027
1028 /* PM support, also needed for reset */
1029
1030 static int pcmcia_dev_suspend(struct device * dev, pm_message_t state)
1031 {
1032 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1033 struct pcmcia_driver *p_drv = NULL;
1034 int ret;
1035
1036 if (dev->driver)
1037 p_drv = to_pcmcia_drv(dev->driver);
1038
1039 if (p_drv && p_drv->suspend) {
1040 ret = p_drv->suspend(p_dev);
1041 if (ret)
1042 return ret;
1043 p_dev->state |= DEV_SUSPEND;
1044 if ((p_dev->state & DEV_CONFIG) &&
1045 !(p_dev->state & DEV_SUSPEND_NORELEASE))
1046 pcmcia_release_configuration(p_dev);
1047 }
1048
1049 return 0;
1050 }
1051
1052
1053 static int pcmcia_dev_resume(struct device * dev)
1054 {
1055 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1056 struct pcmcia_driver *p_drv = NULL;
1057 int ret;
1058
1059 if (dev->driver)
1060 p_drv = to_pcmcia_drv(dev->driver);
1061
1062 if (p_drv && p_drv->resume) {
1063 p_dev->state &= ~DEV_SUSPEND;
1064 if ((p_dev->state & DEV_CONFIG) &&
1065 !(p_dev->state & DEV_SUSPEND_NORELEASE)){
1066 ret = pcmcia_request_configuration(p_dev,
1067 &p_dev->conf);
1068 if (ret)
1069 return ret;
1070 }
1071 return p_drv->resume(p_dev);
1072 }
1073
1074 return 0;
1075 }
1076
1077
1078 static int pcmcia_bus_suspend_callback(struct device *dev, void * _data)
1079 {
1080 struct pcmcia_socket *skt = _data;
1081 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1082
1083 if (p_dev->socket != skt)
1084 return 0;
1085
1086 return dpm_runtime_suspend(dev, PMSG_SUSPEND);
1087 }
1088
1089 static int pcmcia_bus_resume_callback(struct device *dev, void * _data)
1090 {
1091 struct pcmcia_socket *skt = _data;
1092 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1093
1094 if (p_dev->socket != skt)
1095 return 0;
1096
1097 dpm_runtime_resume(dev);
1098
1099 return 0;
1100 }
1101
1102 static int pcmcia_bus_resume(struct pcmcia_socket *skt)
1103 {
1104 bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback);
1105 return 0;
1106 }
1107
1108 static int pcmcia_bus_suspend(struct pcmcia_socket *skt)
1109 {
1110 if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt,
1111 pcmcia_bus_suspend_callback)) {
1112 pcmcia_bus_resume(skt);
1113 return -EIO;
1114 }
1115 return 0;
1116 }
1117
1118
1119 /*======================================================================
1120
1121 The card status event handler.
1122
1123 ======================================================================*/
1124
1125 /* Normally, the event is passed to individual drivers after
1126 * informing userspace. Only for CS_EVENT_CARD_REMOVAL this
1127 * is inversed to maintain historic compatibility.
1128 */
1129
1130 static int ds_event(struct pcmcia_socket *skt, event_t event, int priority)
1131 {
1132 struct pcmcia_socket *s = pcmcia_get_socket(skt);
1133
1134 ds_dbg(1, "ds_event(0x%06x, %d, 0x%p)\n",
1135 event, priority, skt);
1136
1137 switch (event) {
1138 case CS_EVENT_CARD_REMOVAL:
1139 s->pcmcia_state.present = 0;
1140 pcmcia_card_remove(skt);
1141 handle_event(skt, event);
1142 break;
1143
1144 case CS_EVENT_CARD_INSERTION:
1145 s->pcmcia_state.present = 1;
1146 pcmcia_card_add(skt);
1147 handle_event(skt, event);
1148 break;
1149
1150 case CS_EVENT_EJECTION_REQUEST:
1151 break;
1152
1153 case CS_EVENT_PM_SUSPEND:
1154 case CS_EVENT_PM_RESUME:
1155 case CS_EVENT_RESET_PHYSICAL:
1156 case CS_EVENT_CARD_RESET:
1157 default:
1158 handle_event(skt, event);
1159 break;
1160 }
1161
1162 pcmcia_put_socket(s);
1163
1164 return 0;
1165 } /* ds_event */
1166
1167
1168 static struct pcmcia_callback pcmcia_bus_callback = {
1169 .owner = THIS_MODULE,
1170 .event = ds_event,
1171 .requery = pcmcia_bus_rescan,
1172 .suspend = pcmcia_bus_suspend,
1173 .resume = pcmcia_bus_resume,
1174 };
1175
1176 static int __devinit pcmcia_bus_add_socket(struct class_device *class_dev,
1177 struct class_interface *class_intf)
1178 {
1179 struct pcmcia_socket *socket = class_get_devdata(class_dev);
1180 int ret;
1181
1182 socket = pcmcia_get_socket(socket);
1183 if (!socket) {
1184 printk(KERN_ERR "PCMCIA obtaining reference to socket %p failed\n", socket);
1185 return -ENODEV;
1186 }
1187
1188 /*
1189 * Ugly. But we want to wait for the socket threads to have started up.
1190 * We really should let the drivers themselves drive some of this..
1191 */
1192 msleep(250);
1193
1194 #ifdef CONFIG_PCMCIA_IOCTL
1195 init_waitqueue_head(&socket->queue);
1196 #endif
1197 INIT_LIST_HEAD(&socket->devices_list);
1198 INIT_WORK(&socket->device_add, pcmcia_delayed_add_pseudo_device, socket);
1199 memset(&socket->pcmcia_state, 0, sizeof(u8));
1200 socket->device_count = 0;
1201
1202 ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback);
1203 if (ret) {
1204 printk(KERN_ERR "PCMCIA registration PCCard core failed for socket %p\n", socket);
1205 pcmcia_put_socket(socket);
1206 return (ret);
1207 }
1208
1209 return 0;
1210 }
1211
1212 static void pcmcia_bus_remove_socket(struct class_device *class_dev,
1213 struct class_interface *class_intf)
1214 {
1215 struct pcmcia_socket *socket = class_get_devdata(class_dev);
1216
1217 if (!socket)
1218 return;
1219
1220 socket->pcmcia_state.dead = 1;
1221 pccard_register_pcmcia(socket, NULL);
1222
1223 pcmcia_put_socket(socket);
1224
1225 return;
1226 }
1227
1228
1229 /* the pcmcia_bus_interface is used to handle pcmcia socket devices */
1230 static struct class_interface pcmcia_bus_interface = {
1231 .class = &pcmcia_socket_class,
1232 .add = &pcmcia_bus_add_socket,
1233 .remove = &pcmcia_bus_remove_socket,
1234 };
1235
1236
1237 struct bus_type pcmcia_bus_type = {
1238 .name = "pcmcia",
1239 .uevent = pcmcia_bus_uevent,
1240 .match = pcmcia_bus_match,
1241 .dev_attrs = pcmcia_dev_attrs,
1242 .probe = pcmcia_device_probe,
1243 .remove = pcmcia_device_remove,
1244 .suspend = pcmcia_dev_suspend,
1245 .resume = pcmcia_dev_resume,
1246 };
1247
1248
1249 static int __init init_pcmcia_bus(void)
1250 {
1251 spin_lock_init(&pcmcia_dev_list_lock);
1252
1253 bus_register(&pcmcia_bus_type);
1254 class_interface_register(&pcmcia_bus_interface);
1255
1256 pcmcia_setup_ioctl();
1257
1258 return 0;
1259 }
1260 fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that
1261 * pcmcia_socket_class is already registered */
1262
1263
1264 static void __exit exit_pcmcia_bus(void)
1265 {
1266 pcmcia_cleanup_ioctl();
1267
1268 class_interface_unregister(&pcmcia_bus_interface);
1269
1270 bus_unregister(&pcmcia_bus_type);
1271 }
1272 module_exit(exit_pcmcia_bus);
1273
1274
1275 MODULE_ALIAS("ds");
Linux kernel - Deliverables
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