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[mirror_ubuntu-bionic-kernel.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 - 2005 Dominik Brodowski
14 */
15
16 #include <linux/config.h>
17 #include <linux/kernel.h>
18 #include <linux/module.h>
19 #include <linux/init.h>
20 #include <linux/errno.h>
21 #include <linux/list.h>
22 #include <linux/delay.h>
23 #include <linux/workqueue.h>
24 #include <linux/crc32.h>
25 #include <linux/firmware.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 driver->drv.probe = pcmcia_device_probe;
315 driver->drv.remove = pcmcia_device_remove;
316
317 return driver_register(&driver->drv);
318 }
319 EXPORT_SYMBOL(pcmcia_register_driver);
320
321 /**
322 * pcmcia_unregister_driver - unregister a PCMCIA driver with the bus core
323 */
324 void pcmcia_unregister_driver(struct pcmcia_driver *driver)
325 {
326 driver_unregister(&driver->drv);
327 }
328 EXPORT_SYMBOL(pcmcia_unregister_driver);
329
330
331 /* pcmcia_device handling */
332
333 struct pcmcia_device * pcmcia_get_dev(struct pcmcia_device *p_dev)
334 {
335 struct device *tmp_dev;
336 tmp_dev = get_device(&p_dev->dev);
337 if (!tmp_dev)
338 return NULL;
339 return to_pcmcia_dev(tmp_dev);
340 }
341
342 void pcmcia_put_dev(struct pcmcia_device *p_dev)
343 {
344 if (p_dev)
345 put_device(&p_dev->dev);
346 }
347
348 static void pcmcia_release_dev(struct device *dev)
349 {
350 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
351 ds_dbg(1, "releasing dev %p\n", p_dev);
352 pcmcia_put_socket(p_dev->socket);
353 kfree(p_dev->devname);
354 kfree(p_dev);
355 }
356
357
358 static int pcmcia_device_probe(struct device * dev)
359 {
360 struct pcmcia_device *p_dev;
361 struct pcmcia_driver *p_drv;
362 struct pcmcia_socket *s;
363 int ret = 0;
364
365 dev = get_device(dev);
366 if (!dev)
367 return -ENODEV;
368
369 p_dev = to_pcmcia_dev(dev);
370 p_drv = to_pcmcia_drv(dev->driver);
371 s = p_dev->socket;
372
373 if ((!p_drv->probe) || (!try_module_get(p_drv->owner))) {
374 ret = -EINVAL;
375 goto put_dev;
376 }
377
378 p_dev->state &= ~CLIENT_UNBOUND;
379
380 /* set up the device configuration, if it hasn't been done before */
381 if (!s->functions) {
382 cistpl_longlink_mfc_t mfc;
383 if (pccard_read_tuple(s, p_dev->func, CISTPL_LONGLINK_MFC,
384 &mfc) == CS_SUCCESS)
385 s->functions = mfc.nfn;
386 else
387 s->functions = 1;
388 s->config = kzalloc(sizeof(config_t) * s->functions,
389 GFP_KERNEL);
390 if (!s->config) {
391 ret = -ENOMEM;
392 goto put_module;
393 }
394 }
395
396 ret = p_drv->probe(p_dev);
397
398 put_module:
399 if (ret)
400 module_put(p_drv->owner);
401 put_dev:
402 if (ret)
403 put_device(dev);
404 return (ret);
405 }
406
407
408 static int pcmcia_device_remove(struct device * dev)
409 {
410 struct pcmcia_device *p_dev;
411 struct pcmcia_driver *p_drv;
412 int i;
413
414 /* detach the "instance" */
415 p_dev = to_pcmcia_dev(dev);
416 p_drv = to_pcmcia_drv(dev->driver);
417 if (!p_drv)
418 return 0;
419
420 if (p_drv->remove)
421 p_drv->remove(p_dev);
422
423 /* check for proper unloading */
424 if (p_dev->state & (CLIENT_IRQ_REQ|CLIENT_IO_REQ|CLIENT_CONFIG_LOCKED))
425 printk(KERN_INFO "pcmcia: driver %s did not release config properly\n",
426 p_drv->drv.name);
427
428 for (i = 0; i < MAX_WIN; i++)
429 if (p_dev->state & CLIENT_WIN_REQ(i))
430 printk(KERN_INFO "pcmcia: driver %s did not release windows properly\n",
431 p_drv->drv.name);
432
433 /* references from pcmcia_probe_device */
434 p_dev->state = CLIENT_UNBOUND;
435 pcmcia_put_dev(p_dev);
436 module_put(p_drv->owner);
437
438 return 0;
439 }
440
441
442 /*
443 * Removes a PCMCIA card from the device tree and socket list.
444 */
445 static void pcmcia_card_remove(struct pcmcia_socket *s)
446 {
447 struct pcmcia_device *p_dev;
448 unsigned long flags;
449
450 ds_dbg(2, "unbind_request(%d)\n", s->sock);
451
452 s->device_count = 0;
453
454 for (;;) {
455 /* unregister all pcmcia_devices registered with this socket*/
456 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
457 if (list_empty(&s->devices_list)) {
458 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
459 return;
460 }
461 p_dev = list_entry((&s->devices_list)->next, struct pcmcia_device, socket_device_list);
462 list_del(&p_dev->socket_device_list);
463 p_dev->state |= CLIENT_STALE;
464 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
465
466 device_unregister(&p_dev->dev);
467 }
468
469 return;
470 } /* unbind_request */
471
472
473 /*
474 * pcmcia_device_query -- determine information about a pcmcia device
475 */
476 static int pcmcia_device_query(struct pcmcia_device *p_dev)
477 {
478 cistpl_manfid_t manf_id;
479 cistpl_funcid_t func_id;
480 cistpl_vers_1_t *vers1;
481 unsigned int i;
482
483 vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL);
484 if (!vers1)
485 return -ENOMEM;
486
487 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
488 CISTPL_MANFID, &manf_id)) {
489 p_dev->manf_id = manf_id.manf;
490 p_dev->card_id = manf_id.card;
491 p_dev->has_manf_id = 1;
492 p_dev->has_card_id = 1;
493 }
494
495 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
496 CISTPL_FUNCID, &func_id)) {
497 p_dev->func_id = func_id.func;
498 p_dev->has_func_id = 1;
499 } else {
500 /* rule of thumb: cards with no FUNCID, but with
501 * common memory device geometry information, are
502 * probably memory cards (from pcmcia-cs) */
503 cistpl_device_geo_t *devgeo;
504
505 devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL);
506 if (!devgeo) {
507 kfree(vers1);
508 return -ENOMEM;
509 }
510 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
511 CISTPL_DEVICE_GEO, devgeo)) {
512 ds_dbg(0, "mem device geometry probably means "
513 "FUNCID_MEMORY\n");
514 p_dev->func_id = CISTPL_FUNCID_MEMORY;
515 p_dev->has_func_id = 1;
516 }
517 kfree(devgeo);
518 }
519
520 if (!pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_VERS_1,
521 vers1)) {
522 for (i=0; i < vers1->ns; i++) {
523 char *tmp;
524 unsigned int length;
525
526 tmp = vers1->str + vers1->ofs[i];
527
528 length = strlen(tmp) + 1;
529 if ((length < 3) || (length > 255))
530 continue;
531
532 p_dev->prod_id[i] = kmalloc(sizeof(char) * length,
533 GFP_KERNEL);
534 if (!p_dev->prod_id[i])
535 continue;
536
537 p_dev->prod_id[i] = strncpy(p_dev->prod_id[i],
538 tmp, length);
539 }
540 }
541
542 kfree(vers1);
543 return 0;
544 }
545
546
547 /* device_add_lock is needed to avoid double registration by cardmgr and kernel.
548 * Serializes pcmcia_device_add; will most likely be removed in future.
549 *
550 * While it has the caveat that adding new PCMCIA devices inside(!) device_register()
551 * won't work, this doesn't matter much at the moment: the driver core doesn't
552 * support it either.
553 */
554 static DECLARE_MUTEX(device_add_lock);
555
556 struct pcmcia_device * pcmcia_device_add(struct pcmcia_socket *s, unsigned int function)
557 {
558 struct pcmcia_device *p_dev;
559 unsigned long flags;
560 int bus_id_len;
561
562 s = pcmcia_get_socket(s);
563 if (!s)
564 return NULL;
565
566 down(&device_add_lock);
567
568 /* max of 2 devices per card */
569 if (s->device_count == 2)
570 goto err_put;
571
572 p_dev = kzalloc(sizeof(struct pcmcia_device), GFP_KERNEL);
573 if (!p_dev)
574 goto err_put;
575
576 p_dev->socket = s;
577 p_dev->device_no = (s->device_count++);
578 p_dev->func = function;
579
580 p_dev->dev.bus = &pcmcia_bus_type;
581 p_dev->dev.parent = s->dev.dev;
582 p_dev->dev.release = pcmcia_release_dev;
583 bus_id_len = sprintf (p_dev->dev.bus_id, "%d.%d", p_dev->socket->sock, p_dev->device_no);
584
585 p_dev->devname = kmalloc(6 + bus_id_len + 1, GFP_KERNEL);
586 if (!p_dev->devname)
587 goto err_free;
588 sprintf (p_dev->devname, "pcmcia%s", p_dev->dev.bus_id);
589
590 /* compat */
591 p_dev->state = CLIENT_UNBOUND;
592
593 /* Add to the list in pcmcia_bus_socket */
594 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
595 list_add_tail(&p_dev->socket_device_list, &s->devices_list);
596 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
597
598 printk(KERN_NOTICE "pcmcia: registering new device %s\n",
599 p_dev->devname);
600
601 pcmcia_device_query(p_dev);
602
603 if (device_register(&p_dev->dev)) {
604 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
605 list_del(&p_dev->socket_device_list);
606 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
607
608 goto err_free;
609 }
610
611 up(&device_add_lock);
612
613 return p_dev;
614
615 err_free:
616 kfree(p_dev->devname);
617 kfree(p_dev);
618 s->device_count--;
619 err_put:
620 up(&device_add_lock);
621 pcmcia_put_socket(s);
622
623 return NULL;
624 }
625
626
627 static int pcmcia_card_add(struct pcmcia_socket *s)
628 {
629 cisinfo_t cisinfo;
630 cistpl_longlink_mfc_t mfc;
631 unsigned int no_funcs, i;
632 int ret = 0;
633
634 if (!(s->resource_setup_done))
635 return -EAGAIN; /* try again, but later... */
636
637 if (pcmcia_validate_mem(s))
638 return -EAGAIN; /* try again, but later... */
639
640 ret = pccard_validate_cis(s, BIND_FN_ALL, &cisinfo);
641 if (ret || !cisinfo.Chains) {
642 ds_dbg(0, "invalid CIS or invalid resources\n");
643 return -ENODEV;
644 }
645
646 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
647 no_funcs = mfc.nfn;
648 else
649 no_funcs = 1;
650
651 for (i=0; i < no_funcs; i++)
652 pcmcia_device_add(s, i);
653
654 return (ret);
655 }
656
657
658 static void pcmcia_delayed_add_pseudo_device(void *data)
659 {
660 struct pcmcia_socket *s = data;
661 pcmcia_device_add(s, 0);
662 s->pcmcia_state.device_add_pending = 0;
663 }
664
665 static inline void pcmcia_add_pseudo_device(struct pcmcia_socket *s)
666 {
667 if (!s->pcmcia_state.device_add_pending) {
668 s->pcmcia_state.device_add_pending = 1;
669 schedule_work(&s->device_add);
670 }
671 return;
672 }
673
674 static int pcmcia_requery(struct device *dev, void * _data)
675 {
676 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
677 if (!p_dev->dev.driver)
678 pcmcia_device_query(p_dev);
679
680 return 0;
681 }
682
683 static void pcmcia_bus_rescan(struct pcmcia_socket *skt)
684 {
685 int no_devices=0;
686 unsigned long flags;
687
688 /* must be called with skt_sem held */
689 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
690 if (list_empty(&skt->devices_list))
691 no_devices=1;
692 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
693
694 /* if no devices were added for this socket yet because of
695 * missing resource information or other trouble, we need to
696 * do this now. */
697 if (no_devices) {
698 int ret = pcmcia_card_add(skt);
699 if (ret)
700 return;
701 }
702
703 /* some device information might have changed because of a CIS
704 * update or because we can finally read it correctly... so
705 * determine it again, overwriting old values if necessary. */
706 bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery);
707
708 /* we re-scan all devices, not just the ones connected to this
709 * socket. This does not matter, though. */
710 bus_rescan_devices(&pcmcia_bus_type);
711 }
712
713 static inline int pcmcia_devmatch(struct pcmcia_device *dev,
714 struct pcmcia_device_id *did)
715 {
716 if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
717 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
718 return 0;
719 }
720
721 if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
722 if ((!dev->has_card_id) || (dev->card_id != did->card_id))
723 return 0;
724 }
725
726 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
727 if (dev->func != did->function)
728 return 0;
729 }
730
731 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
732 if (!dev->prod_id[0])
733 return 0;
734 if (strcmp(did->prod_id[0], dev->prod_id[0]))
735 return 0;
736 }
737
738 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
739 if (!dev->prod_id[1])
740 return 0;
741 if (strcmp(did->prod_id[1], dev->prod_id[1]))
742 return 0;
743 }
744
745 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
746 if (!dev->prod_id[2])
747 return 0;
748 if (strcmp(did->prod_id[2], dev->prod_id[2]))
749 return 0;
750 }
751
752 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
753 if (!dev->prod_id[3])
754 return 0;
755 if (strcmp(did->prod_id[3], dev->prod_id[3]))
756 return 0;
757 }
758
759 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
760 /* handle pseudo multifunction devices:
761 * there are at most two pseudo multifunction devices.
762 * if we're matching against the first, schedule a
763 * call which will then check whether there are two
764 * pseudo devices, and if not, add the second one.
765 */
766 if (dev->device_no == 0)
767 pcmcia_add_pseudo_device(dev->socket);
768
769 if (dev->device_no != did->device_no)
770 return 0;
771 }
772
773 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
774 if ((!dev->has_func_id) || (dev->func_id != did->func_id))
775 return 0;
776
777 /* if this is a pseudo-multi-function device,
778 * we need explicit matches */
779 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO)
780 return 0;
781 if (dev->device_no)
782 return 0;
783
784 /* also, FUNC_ID matching needs to be activated by userspace
785 * after it has re-checked that there is no possible module
786 * with a prod_id/manf_id/card_id match.
787 */
788 if (!dev->allow_func_id_match)
789 return 0;
790 }
791
792 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
793 if (!dev->socket->fake_cis)
794 pcmcia_load_firmware(dev, did->cisfile);
795
796 if (!dev->socket->fake_cis)
797 return 0;
798 }
799
800 if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
801 int i;
802 for (i=0; i<4; i++)
803 if (dev->prod_id[i])
804 return 0;
805 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
806 return 0;
807 }
808
809 dev->dev.driver_data = (void *) did;
810
811 return 1;
812 }
813
814
815 static int pcmcia_bus_match(struct device * dev, struct device_driver * drv) {
816 struct pcmcia_device * p_dev = to_pcmcia_dev(dev);
817 struct pcmcia_driver * p_drv = to_pcmcia_drv(drv);
818 struct pcmcia_device_id *did = p_drv->id_table;
819
820 /* matching by cardmgr */
821 if (p_dev->cardmgr == p_drv)
822 return 1;
823
824 while (did && did->match_flags) {
825 if (pcmcia_devmatch(p_dev, did))
826 return 1;
827 did++;
828 }
829
830 return 0;
831 }
832
833 #ifdef CONFIG_HOTPLUG
834
835 static int pcmcia_bus_uevent(struct device *dev, char **envp, int num_envp,
836 char *buffer, int buffer_size)
837 {
838 struct pcmcia_device *p_dev;
839 int i, length = 0;
840 u32 hash[4] = { 0, 0, 0, 0};
841
842 if (!dev)
843 return -ENODEV;
844
845 p_dev = to_pcmcia_dev(dev);
846
847 /* calculate hashes */
848 for (i=0; i<4; i++) {
849 if (!p_dev->prod_id[i])
850 continue;
851 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
852 }
853
854 i = 0;
855
856 if (add_uevent_var(envp, num_envp, &i,
857 buffer, buffer_size, &length,
858 "SOCKET_NO=%u",
859 p_dev->socket->sock))
860 return -ENOMEM;
861
862 if (add_uevent_var(envp, num_envp, &i,
863 buffer, buffer_size, &length,
864 "DEVICE_NO=%02X",
865 p_dev->device_no))
866 return -ENOMEM;
867
868 if (add_uevent_var(envp, num_envp, &i,
869 buffer, buffer_size, &length,
870 "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
871 "pa%08Xpb%08Xpc%08Xpd%08X",
872 p_dev->has_manf_id ? p_dev->manf_id : 0,
873 p_dev->has_card_id ? p_dev->card_id : 0,
874 p_dev->has_func_id ? p_dev->func_id : 0,
875 p_dev->func,
876 p_dev->device_no,
877 hash[0],
878 hash[1],
879 hash[2],
880 hash[3]))
881 return -ENOMEM;
882
883 envp[i] = NULL;
884
885 return 0;
886 }
887
888 #else
889
890 static int pcmcia_bus_uevent(struct device *dev, char **envp, int num_envp,
891 char *buffer, int buffer_size)
892 {
893 return -ENODEV;
894 }
895
896 #endif
897
898 /************************ per-device sysfs output ***************************/
899
900 #define pcmcia_device_attr(field, test, format) \
901 static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf) \
902 { \
903 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
904 return p_dev->test ? sprintf (buf, format, p_dev->field) : -ENODEV; \
905 }
906
907 #define pcmcia_device_stringattr(name, field) \
908 static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf) \
909 { \
910 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
911 return p_dev->field ? sprintf (buf, "%s\n", p_dev->field) : -ENODEV; \
912 }
913
914 pcmcia_device_attr(func, socket, "0x%02x\n");
915 pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
916 pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
917 pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
918 pcmcia_device_stringattr(prod_id1, prod_id[0]);
919 pcmcia_device_stringattr(prod_id2, prod_id[1]);
920 pcmcia_device_stringattr(prod_id3, prod_id[2]);
921 pcmcia_device_stringattr(prod_id4, prod_id[3]);
922
923 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
924 {
925 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
926 int i;
927 u32 hash[4] = { 0, 0, 0, 0};
928
929 /* calculate hashes */
930 for (i=0; i<4; i++) {
931 if (!p_dev->prod_id[i])
932 continue;
933 hash[i] = crc32(0,p_dev->prod_id[i],strlen(p_dev->prod_id[i]));
934 }
935 return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
936 "pa%08Xpb%08Xpc%08Xpd%08X\n",
937 p_dev->has_manf_id ? p_dev->manf_id : 0,
938 p_dev->has_card_id ? p_dev->card_id : 0,
939 p_dev->has_func_id ? p_dev->func_id : 0,
940 p_dev->func, p_dev->device_no,
941 hash[0], hash[1], hash[2], hash[3]);
942 }
943
944 static ssize_t pcmcia_store_allow_func_id_match(struct device *dev,
945 struct device_attribute *attr, const char *buf, size_t count)
946 {
947 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
948 if (!count)
949 return -EINVAL;
950
951 down(&p_dev->socket->skt_sem);
952 p_dev->allow_func_id_match = 1;
953 up(&p_dev->socket->skt_sem);
954
955 bus_rescan_devices(&pcmcia_bus_type);
956
957 return count;
958 }
959
960 static struct device_attribute pcmcia_dev_attrs[] = {
961 __ATTR(function, 0444, func_show, NULL),
962 __ATTR_RO(func_id),
963 __ATTR_RO(manf_id),
964 __ATTR_RO(card_id),
965 __ATTR_RO(prod_id1),
966 __ATTR_RO(prod_id2),
967 __ATTR_RO(prod_id3),
968 __ATTR_RO(prod_id4),
969 __ATTR_RO(modalias),
970 __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match),
971 __ATTR_NULL,
972 };
973
974 /* PM support, also needed for reset */
975
976 static int pcmcia_dev_suspend(struct device * dev, pm_message_t state)
977 {
978 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
979 struct pcmcia_driver *p_drv = NULL;
980
981 if (dev->driver)
982 p_drv = to_pcmcia_drv(dev->driver);
983
984 if (p_drv && p_drv->suspend)
985 return p_drv->suspend(p_dev);
986
987 return 0;
988 }
989
990
991 static int pcmcia_dev_resume(struct device * dev)
992 {
993 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
994 struct pcmcia_driver *p_drv = NULL;
995
996 if (dev->driver)
997 p_drv = to_pcmcia_drv(dev->driver);
998
999 if (p_drv && p_drv->resume)
1000 return p_drv->resume(p_dev);
1001
1002 return 0;
1003 }
1004
1005
1006 static int pcmcia_bus_suspend_callback(struct device *dev, void * _data)
1007 {
1008 struct pcmcia_socket *skt = _data;
1009 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1010
1011 if (p_dev->socket != skt)
1012 return 0;
1013
1014 return dpm_runtime_suspend(dev, PMSG_SUSPEND);
1015 }
1016
1017 static int pcmcia_bus_resume_callback(struct device *dev, void * _data)
1018 {
1019 struct pcmcia_socket *skt = _data;
1020 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1021
1022 if (p_dev->socket != skt)
1023 return 0;
1024
1025 dpm_runtime_resume(dev);
1026
1027 return 0;
1028 }
1029
1030 static int pcmcia_bus_resume(struct pcmcia_socket *skt)
1031 {
1032 bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback);
1033 return 0;
1034 }
1035
1036 static int pcmcia_bus_suspend(struct pcmcia_socket *skt)
1037 {
1038 if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt,
1039 pcmcia_bus_suspend_callback)) {
1040 pcmcia_bus_resume(skt);
1041 return -EIO;
1042 }
1043 return 0;
1044 }
1045
1046
1047 /*======================================================================
1048
1049 The card status event handler.
1050
1051 ======================================================================*/
1052
1053 /* Normally, the event is passed to individual drivers after
1054 * informing userspace. Only for CS_EVENT_CARD_REMOVAL this
1055 * is inversed to maintain historic compatibility.
1056 */
1057
1058 static int ds_event(struct pcmcia_socket *skt, event_t event, int priority)
1059 {
1060 struct pcmcia_socket *s = pcmcia_get_socket(skt);
1061
1062 ds_dbg(1, "ds_event(0x%06x, %d, 0x%p)\n",
1063 event, priority, skt);
1064
1065 switch (event) {
1066 case CS_EVENT_CARD_REMOVAL:
1067 s->pcmcia_state.present = 0;
1068 pcmcia_card_remove(skt);
1069 handle_event(skt, event);
1070 break;
1071
1072 case CS_EVENT_CARD_INSERTION:
1073 s->pcmcia_state.present = 1;
1074 pcmcia_card_add(skt);
1075 handle_event(skt, event);
1076 break;
1077
1078 case CS_EVENT_EJECTION_REQUEST:
1079 break;
1080
1081 case CS_EVENT_PM_SUSPEND:
1082 case CS_EVENT_PM_RESUME:
1083 case CS_EVENT_RESET_PHYSICAL:
1084 case CS_EVENT_CARD_RESET:
1085 default:
1086 handle_event(skt, event);
1087 break;
1088 }
1089
1090 pcmcia_put_socket(s);
1091
1092 return 0;
1093 } /* ds_event */
1094
1095
1096 static struct pcmcia_callback pcmcia_bus_callback = {
1097 .owner = THIS_MODULE,
1098 .event = ds_event,
1099 .requery = pcmcia_bus_rescan,
1100 .suspend = pcmcia_bus_suspend,
1101 .resume = pcmcia_bus_resume,
1102 };
1103
1104 static int __devinit pcmcia_bus_add_socket(struct class_device *class_dev,
1105 struct class_interface *class_intf)
1106 {
1107 struct pcmcia_socket *socket = class_get_devdata(class_dev);
1108 int ret;
1109
1110 socket = pcmcia_get_socket(socket);
1111 if (!socket) {
1112 printk(KERN_ERR "PCMCIA obtaining reference to socket %p failed\n", socket);
1113 return -ENODEV;
1114 }
1115
1116 /*
1117 * Ugly. But we want to wait for the socket threads to have started up.
1118 * We really should let the drivers themselves drive some of this..
1119 */
1120 msleep(250);
1121
1122 #ifdef CONFIG_PCMCIA_IOCTL
1123 init_waitqueue_head(&socket->queue);
1124 #endif
1125 INIT_LIST_HEAD(&socket->devices_list);
1126 INIT_WORK(&socket->device_add, pcmcia_delayed_add_pseudo_device, socket);
1127 memset(&socket->pcmcia_state, 0, sizeof(u8));
1128 socket->device_count = 0;
1129
1130 ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback);
1131 if (ret) {
1132 printk(KERN_ERR "PCMCIA registration PCCard core failed for socket %p\n", socket);
1133 pcmcia_put_socket(socket);
1134 return (ret);
1135 }
1136
1137 return 0;
1138 }
1139
1140 static void pcmcia_bus_remove_socket(struct class_device *class_dev,
1141 struct class_interface *class_intf)
1142 {
1143 struct pcmcia_socket *socket = class_get_devdata(class_dev);
1144
1145 if (!socket)
1146 return;
1147
1148 socket->pcmcia_state.dead = 1;
1149 pccard_register_pcmcia(socket, NULL);
1150
1151 pcmcia_put_socket(socket);
1152
1153 return;
1154 }
1155
1156
1157 /* the pcmcia_bus_interface is used to handle pcmcia socket devices */
1158 static struct class_interface pcmcia_bus_interface = {
1159 .class = &pcmcia_socket_class,
1160 .add = &pcmcia_bus_add_socket,
1161 .remove = &pcmcia_bus_remove_socket,
1162 };
1163
1164
1165 struct bus_type pcmcia_bus_type = {
1166 .name = "pcmcia",
1167 .uevent = pcmcia_bus_uevent,
1168 .match = pcmcia_bus_match,
1169 .dev_attrs = pcmcia_dev_attrs,
1170 .suspend = pcmcia_dev_suspend,
1171 .resume = pcmcia_dev_resume,
1172 };
1173
1174
1175 static int __init init_pcmcia_bus(void)
1176 {
1177 spin_lock_init(&pcmcia_dev_list_lock);
1178
1179 bus_register(&pcmcia_bus_type);
1180 class_interface_register(&pcmcia_bus_interface);
1181
1182 pcmcia_setup_ioctl();
1183
1184 return 0;
1185 }
1186 fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that
1187 * pcmcia_socket_class is already registered */
1188
1189
1190 static void __exit exit_pcmcia_bus(void)
1191 {
1192 pcmcia_cleanup_ioctl();
1193
1194 class_interface_unregister(&pcmcia_bus_interface);
1195
1196 bus_unregister(&pcmcia_bus_type);
1197 }
1198 module_exit(exit_pcmcia_bus);
1199
1200
1201 MODULE_ALIAS("ds");
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