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Merge master.kernel.org:/home/rmk/linux-2.6-arm
[linux/fpc-iii.git] / drivers / pcmcia / ds.c
blobbb96ce1db08c314507d333a1c6145ebfb09006bf
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
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_dev(struct device *dev)
347 {
348 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
349 ds_dbg(1, "releasing dev %p\n", p_dev);
350 pcmcia_put_socket(p_dev->socket);
351 kfree(p_dev->devname);
352 kfree(p_dev);
353 }
354
355 static void pcmcia_add_pseudo_device(struct pcmcia_socket *s)
356 {
357 if (!s->pcmcia_state.device_add_pending) {
358 s->pcmcia_state.device_add_pending = 1;
359 schedule_work(&s->device_add);
360 }
361 return;
362 }
363
364 static int pcmcia_device_probe(struct device * dev)
365 {
366 struct pcmcia_device *p_dev;
367 struct pcmcia_driver *p_drv;
368 struct pcmcia_device_id *did;
369 struct pcmcia_socket *s;
370 int ret = 0;
371
372 dev = get_device(dev);
373 if (!dev)
374 return -ENODEV;
375
376 p_dev = to_pcmcia_dev(dev);
377 p_drv = to_pcmcia_drv(dev->driver);
378 s = p_dev->socket;
379
380 if ((!p_drv->probe) || (!try_module_get(p_drv->owner))) {
381 ret = -EINVAL;
382 goto put_dev;
383 }
384
385 p_dev->state &= ~CLIENT_UNBOUND;
386
387 /* set up the device configuration, if it hasn't been done before */
388 if (!s->functions) {
389 cistpl_longlink_mfc_t mfc;
390 if (pccard_read_tuple(s, p_dev->func, CISTPL_LONGLINK_MFC,
391 &mfc) == CS_SUCCESS)
392 s->functions = mfc.nfn;
393 else
394 s->functions = 1;
395 s->config = kzalloc(sizeof(config_t) * s->functions,
396 GFP_KERNEL);
397 if (!s->config) {
398 ret = -ENOMEM;
399 goto put_module;
400 }
401 }
402
403 ret = p_drv->probe(p_dev);
404 if (ret)
405 goto put_module;
406
407 /* handle pseudo multifunction devices:
408 * there are at most two pseudo multifunction devices.
409 * if we're matching against the first, schedule a
410 * call which will then check whether there are two
411 * pseudo devices, and if not, add the second one.
412 */
413 did = (struct pcmcia_device_id *) p_dev->dev.driver_data;
414 if (did && (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) &&
415 (p_dev->socket->device_count == 1) && (p_dev->device_no == 0))
416 pcmcia_add_pseudo_device(p_dev->socket);
417
418 put_module:
419 if (ret)
420 module_put(p_drv->owner);
421 put_dev:
422 if (ret)
423 put_device(dev);
424 return (ret);
425 }
426
427
428 static int pcmcia_device_remove(struct device * dev)
429 {
430 struct pcmcia_device *p_dev;
431 struct pcmcia_driver *p_drv;
432 int i;
433
434 /* detach the "instance" */
435 p_dev = to_pcmcia_dev(dev);
436 p_drv = to_pcmcia_drv(dev->driver);
437 if (!p_drv)
438 return 0;
439
440 if (p_drv->remove)
441 p_drv->remove(p_dev);
442
443 /* check for proper unloading */
444 if (p_dev->state & (CLIENT_IRQ_REQ|CLIENT_IO_REQ|CLIENT_CONFIG_LOCKED))
445 printk(KERN_INFO "pcmcia: driver %s did not release config properly\n",
446 p_drv->drv.name);
447
448 for (i = 0; i < MAX_WIN; i++)
449 if (p_dev->state & CLIENT_WIN_REQ(i))
450 printk(KERN_INFO "pcmcia: driver %s did not release windows properly\n",
451 p_drv->drv.name);
452
453 /* references from pcmcia_probe_device */
454 p_dev->state = CLIENT_UNBOUND;
455 pcmcia_put_dev(p_dev);
456 module_put(p_drv->owner);
457
458 return 0;
459 }
460
461
462 /*
463 * Removes a PCMCIA card from the device tree and socket list.
464 */
465 static void pcmcia_card_remove(struct pcmcia_socket *s)
466 {
467 struct pcmcia_device *p_dev;
468 unsigned long flags;
469
470 ds_dbg(2, "unbind_request(%d)\n", s->sock);
471
472 s->device_count = 0;
473
474 for (;;) {
475 /* unregister all pcmcia_devices registered with this socket*/
476 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
477 if (list_empty(&s->devices_list)) {
478 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
479 return;
480 }
481 p_dev = list_entry((&s->devices_list)->next, struct pcmcia_device, socket_device_list);
482 list_del(&p_dev->socket_device_list);
483 p_dev->state |= CLIENT_STALE;
484 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
485
486 device_unregister(&p_dev->dev);
487 }
488
489 return;
490 } /* unbind_request */
491
492
493 /*
494 * pcmcia_device_query -- determine information about a pcmcia device
495 */
496 static int pcmcia_device_query(struct pcmcia_device *p_dev)
497 {
498 cistpl_manfid_t manf_id;
499 cistpl_funcid_t func_id;
500 cistpl_vers_1_t *vers1;
501 unsigned int i;
502
503 vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL);
504 if (!vers1)
505 return -ENOMEM;
506
507 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
508 CISTPL_MANFID, &manf_id)) {
509 p_dev->manf_id = manf_id.manf;
510 p_dev->card_id = manf_id.card;
511 p_dev->has_manf_id = 1;
512 p_dev->has_card_id = 1;
513 }
514
515 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
516 CISTPL_FUNCID, &func_id)) {
517 p_dev->func_id = func_id.func;
518 p_dev->has_func_id = 1;
519 } else {
520 /* rule of thumb: cards with no FUNCID, but with
521 * common memory device geometry information, are
522 * probably memory cards (from pcmcia-cs) */
523 cistpl_device_geo_t *devgeo;
524
525 devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL);
526 if (!devgeo) {
527 kfree(vers1);
528 return -ENOMEM;
529 }
530 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
531 CISTPL_DEVICE_GEO, devgeo)) {
532 ds_dbg(0, "mem device geometry probably means "
533 "FUNCID_MEMORY\n");
534 p_dev->func_id = CISTPL_FUNCID_MEMORY;
535 p_dev->has_func_id = 1;
536 }
537 kfree(devgeo);
538 }
539
540 if (!pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_VERS_1,
541 vers1)) {
542 for (i=0; i < vers1->ns; i++) {
543 char *tmp;
544 unsigned int length;
545
546 tmp = vers1->str + vers1->ofs[i];
547
548 length = strlen(tmp) + 1;
549 if ((length < 3) || (length > 255))
550 continue;
551
552 p_dev->prod_id[i] = kmalloc(sizeof(char) * length,
553 GFP_KERNEL);
554 if (!p_dev->prod_id[i])
555 continue;
556
557 p_dev->prod_id[i] = strncpy(p_dev->prod_id[i],
558 tmp, length);
559 }
560 }
561
562 kfree(vers1);
563 return 0;
564 }
565
566
567 /* device_add_lock is needed to avoid double registration by cardmgr and kernel.
568 * Serializes pcmcia_device_add; will most likely be removed in future.
569 *
570 * While it has the caveat that adding new PCMCIA devices inside(!) device_register()
571 * won't work, this doesn't matter much at the moment: the driver core doesn't
572 * support it either.
573 */
574 static DECLARE_MUTEX(device_add_lock);
575
576 struct pcmcia_device * pcmcia_device_add(struct pcmcia_socket *s, unsigned int function)
577 {
578 struct pcmcia_device *p_dev;
579 unsigned long flags;
580 int bus_id_len;
581
582 s = pcmcia_get_socket(s);
583 if (!s)
584 return NULL;
585
586 down(&device_add_lock);
587
588 /* max of 2 devices per card */
589 if (s->device_count == 2)
590 goto err_put;
591
592 p_dev = kzalloc(sizeof(struct pcmcia_device), GFP_KERNEL);
593 if (!p_dev)
594 goto err_put;
595
596 p_dev->socket = s;
597 p_dev->device_no = (s->device_count++);
598 p_dev->func = function;
599
600 p_dev->dev.bus = &pcmcia_bus_type;
601 p_dev->dev.parent = s->dev.dev;
602 p_dev->dev.release = pcmcia_release_dev;
603 bus_id_len = sprintf (p_dev->dev.bus_id, "%d.%d", p_dev->socket->sock, p_dev->device_no);
604
605 p_dev->devname = kmalloc(6 + bus_id_len + 1, GFP_KERNEL);
606 if (!p_dev->devname)
607 goto err_free;
608 sprintf (p_dev->devname, "pcmcia%s", p_dev->dev.bus_id);
609
610 /* compat */
611 p_dev->state = CLIENT_UNBOUND;
612
613 /* Add to the list in pcmcia_bus_socket */
614 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
615 list_add_tail(&p_dev->socket_device_list, &s->devices_list);
616 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
617
618 printk(KERN_NOTICE "pcmcia: registering new device %s\n",
619 p_dev->devname);
620
621 pcmcia_device_query(p_dev);
622
623 if (device_register(&p_dev->dev)) {
624 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
625 list_del(&p_dev->socket_device_list);
626 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
627
628 goto err_free;
629 }
630
631 up(&device_add_lock);
632
633 return p_dev;
634
635 err_free:
636 kfree(p_dev->devname);
637 kfree(p_dev);
638 s->device_count--;
639 err_put:
640 up(&device_add_lock);
641 pcmcia_put_socket(s);
642
643 return NULL;
644 }
645
646
647 static int pcmcia_card_add(struct pcmcia_socket *s)
648 {
649 cisinfo_t cisinfo;
650 cistpl_longlink_mfc_t mfc;
651 unsigned int no_funcs, i;
652 int ret = 0;
653
654 if (!(s->resource_setup_done))
655 return -EAGAIN; /* try again, but later... */
656
657 if (pcmcia_validate_mem(s))
658 return -EAGAIN; /* try again, but later... */
659
660 ret = pccard_validate_cis(s, BIND_FN_ALL, &cisinfo);
661 if (ret || !cisinfo.Chains) {
662 ds_dbg(0, "invalid CIS or invalid resources\n");
663 return -ENODEV;
664 }
665
666 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
667 no_funcs = mfc.nfn;
668 else
669 no_funcs = 1;
670
671 for (i=0; i < no_funcs; i++)
672 pcmcia_device_add(s, i);
673
674 return (ret);
675 }
676
677
678 static void pcmcia_delayed_add_pseudo_device(void *data)
679 {
680 struct pcmcia_socket *s = data;
681 pcmcia_device_add(s, 0);
682 s->pcmcia_state.device_add_pending = 0;
683 }
684
685 static int pcmcia_requery(struct device *dev, void * _data)
686 {
687 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
688 if (!p_dev->dev.driver)
689 pcmcia_device_query(p_dev);
690
691 return 0;
692 }
693
694 static void pcmcia_bus_rescan(struct pcmcia_socket *skt)
695 {
696 int no_devices=0;
697 unsigned long flags;
698
699 /* must be called with skt_sem held */
700 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
701 if (list_empty(&skt->devices_list))
702 no_devices=1;
703 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
704
705 /* if no devices were added for this socket yet because of
706 * missing resource information or other trouble, we need to
707 * do this now. */
708 if (no_devices) {
709 int ret = pcmcia_card_add(skt);
710 if (ret)
711 return;
712 }
713
714 /* some device information might have changed because of a CIS
715 * update or because we can finally read it correctly... so
716 * determine it again, overwriting old values if necessary. */
717 bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery);
718
719 /* we re-scan all devices, not just the ones connected to this
720 * socket. This does not matter, though. */
721 bus_rescan_devices(&pcmcia_bus_type);
722 }
723
724 static inline int pcmcia_devmatch(struct pcmcia_device *dev,
725 struct pcmcia_device_id *did)
726 {
727 if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
728 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
729 return 0;
730 }
731
732 if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
733 if ((!dev->has_card_id) || (dev->card_id != did->card_id))
734 return 0;
735 }
736
737 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
738 if (dev->func != did->function)
739 return 0;
740 }
741
742 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
743 if (!dev->prod_id[0])
744 return 0;
745 if (strcmp(did->prod_id[0], dev->prod_id[0]))
746 return 0;
747 }
748
749 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
750 if (!dev->prod_id[1])
751 return 0;
752 if (strcmp(did->prod_id[1], dev->prod_id[1]))
753 return 0;
754 }
755
756 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
757 if (!dev->prod_id[2])
758 return 0;
759 if (strcmp(did->prod_id[2], dev->prod_id[2]))
760 return 0;
761 }
762
763 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
764 if (!dev->prod_id[3])
765 return 0;
766 if (strcmp(did->prod_id[3], dev->prod_id[3]))
767 return 0;
768 }
769
770 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
771 if (dev->device_no != did->device_no)
772 return 0;
773 }
774
775 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
776 if ((!dev->has_func_id) || (dev->func_id != did->func_id))
777 return 0;
778
779 /* if this is a pseudo-multi-function device,
780 * we need explicit matches */
781 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO)
782 return 0;
783 if (dev->device_no)
784 return 0;
785
786 /* also, FUNC_ID matching needs to be activated by userspace
787 * after it has re-checked that there is no possible module
788 * with a prod_id/manf_id/card_id match.
789 */
790 if (!dev->allow_func_id_match)
791 return 0;
792 }
793
794 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
795 if (!dev->socket->fake_cis)
796 pcmcia_load_firmware(dev, did->cisfile);
797
798 if (!dev->socket->fake_cis)
799 return 0;
800 }
801
802 if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
803 int i;
804 for (i=0; i<4; i++)
805 if (dev->prod_id[i])
806 return 0;
807 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
808 return 0;
809 }
810
811 dev->dev.driver_data = (void *) did;
812
813 return 1;
814 }
815
816
817 static int pcmcia_bus_match(struct device * dev, struct device_driver * drv) {
818 struct pcmcia_device * p_dev = to_pcmcia_dev(dev);
819 struct pcmcia_driver * p_drv = to_pcmcia_drv(drv);
820 struct pcmcia_device_id *did = p_drv->id_table;
821
822 /* matching by cardmgr */
823 if (p_dev->cardmgr == p_drv)
824 return 1;
825
826 while (did && did->match_flags) {
827 if (pcmcia_devmatch(p_dev, did))
828 return 1;
829 did++;
830 }
831
832 return 0;
833 }
834
835 #ifdef CONFIG_HOTPLUG
836
837 static int pcmcia_bus_uevent(struct device *dev, char **envp, int num_envp,
838 char *buffer, int buffer_size)
839 {
840 struct pcmcia_device *p_dev;
841 int i, length = 0;
842 u32 hash[4] = { 0, 0, 0, 0};
843
844 if (!dev)
845 return -ENODEV;
846
847 p_dev = to_pcmcia_dev(dev);
848
849 /* calculate hashes */
850 for (i=0; i<4; i++) {
851 if (!p_dev->prod_id[i])
852 continue;
853 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
854 }
855
856 i = 0;
857
858 if (add_uevent_var(envp, num_envp, &i,
859 buffer, buffer_size, &length,
860 "SOCKET_NO=%u",
861 p_dev->socket->sock))
862 return -ENOMEM;
863
864 if (add_uevent_var(envp, num_envp, &i,
865 buffer, buffer_size, &length,
866 "DEVICE_NO=%02X",
867 p_dev->device_no))
868 return -ENOMEM;
869
870 if (add_uevent_var(envp, num_envp, &i,
871 buffer, buffer_size, &length,
872 "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
873 "pa%08Xpb%08Xpc%08Xpd%08X",
874 p_dev->has_manf_id ? p_dev->manf_id : 0,
875 p_dev->has_card_id ? p_dev->card_id : 0,
876 p_dev->has_func_id ? p_dev->func_id : 0,
877 p_dev->func,
878 p_dev->device_no,
879 hash[0],
880 hash[1],
881 hash[2],
882 hash[3]))
883 return -ENOMEM;
884
885 envp[i] = NULL;
886
887 return 0;
888 }
889
890 #else
891
892 static int pcmcia_bus_uevent(struct device *dev, char **envp, int num_envp,
893 char *buffer, int buffer_size)
894 {
895 return -ENODEV;
896 }
897
898 #endif
899
900 /************************ per-device sysfs output ***************************/
901
902 #define pcmcia_device_attr(field, test, format) \
903 static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf) \
904 { \
905 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
906 return p_dev->test ? sprintf (buf, format, p_dev->field) : -ENODEV; \
907 }
908
909 #define pcmcia_device_stringattr(name, field) \
910 static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf) \
911 { \
912 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
913 return p_dev->field ? sprintf (buf, "%s\n", p_dev->field) : -ENODEV; \
914 }
915
916 pcmcia_device_attr(func, socket, "0x%02x\n");
917 pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
918 pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
919 pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
920 pcmcia_device_stringattr(prod_id1, prod_id[0]);
921 pcmcia_device_stringattr(prod_id2, prod_id[1]);
922 pcmcia_device_stringattr(prod_id3, prod_id[2]);
923 pcmcia_device_stringattr(prod_id4, prod_id[3]);
924
925
926 static ssize_t pcmcia_show_pm_state(struct device *dev, struct device_attribute *attr, char *buf)
927 {
928 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
929
930 if (p_dev->dev.power.power_state.event != PM_EVENT_ON)
931 return sprintf(buf, "off\n");
932 else
933 return sprintf(buf, "on\n");
934 }
935
936 static ssize_t pcmcia_store_pm_state(struct device *dev, struct device_attribute *attr,
937 const char *buf, size_t count)
938 {
939 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
940 int ret = 0;
941
942 if (!count)
943 return -EINVAL;
944
945 if ((p_dev->dev.power.power_state.event == PM_EVENT_ON) &&
946 (!strncmp(buf, "off", 3)))
947 ret = dpm_runtime_suspend(dev, PMSG_SUSPEND);
948 else if ((p_dev->dev.power.power_state.event != PM_EVENT_ON) &&
949 (!strncmp(buf, "on", 2)))
950 dpm_runtime_resume(dev);
951
952 return ret ? ret : count;
953 }
954
955
956 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
957 {
958 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
959 int i;
960 u32 hash[4] = { 0, 0, 0, 0};
961
962 /* calculate hashes */
963 for (i=0; i<4; i++) {
964 if (!p_dev->prod_id[i])
965 continue;
966 hash[i] = crc32(0,p_dev->prod_id[i],strlen(p_dev->prod_id[i]));
967 }
968 return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
969 "pa%08Xpb%08Xpc%08Xpd%08X\n",
970 p_dev->has_manf_id ? p_dev->manf_id : 0,
971 p_dev->has_card_id ? p_dev->card_id : 0,
972 p_dev->has_func_id ? p_dev->func_id : 0,
973 p_dev->func, p_dev->device_no,
974 hash[0], hash[1], hash[2], hash[3]);
975 }
976
977 static ssize_t pcmcia_store_allow_func_id_match(struct device *dev,
978 struct device_attribute *attr, const char *buf, size_t count)
979 {
980 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
981
982 if (!count)
983 return -EINVAL;
984
985 down(&p_dev->socket->skt_sem);
986 p_dev->allow_func_id_match = 1;
987 up(&p_dev->socket->skt_sem);
988
989 bus_rescan_devices(&pcmcia_bus_type);
990
991 return count;
992 }
993
994 static struct device_attribute pcmcia_dev_attrs[] = {
995 __ATTR(function, 0444, func_show, NULL),
996 __ATTR(pm_state, 0644, pcmcia_show_pm_state, pcmcia_store_pm_state),
997 __ATTR_RO(func_id),
998 __ATTR_RO(manf_id),
999 __ATTR_RO(card_id),
1000 __ATTR_RO(prod_id1),
1001 __ATTR_RO(prod_id2),
1002 __ATTR_RO(prod_id3),
1003 __ATTR_RO(prod_id4),
1004 __ATTR_RO(modalias),
1005 __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match),
1006 __ATTR_NULL,
1007 };
1008
1009 /* PM support, also needed for reset */
1010
1011 static int pcmcia_dev_suspend(struct device * dev, pm_message_t state)
1012 {
1013 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1014 struct pcmcia_driver *p_drv = NULL;
1015
1016 if (dev->driver)
1017 p_drv = to_pcmcia_drv(dev->driver);
1018
1019 if (p_drv && p_drv->suspend)
1020 return p_drv->suspend(p_dev);
1021
1022 return 0;
1023 }
1024
1025
1026 static int pcmcia_dev_resume(struct device * dev)
1027 {
1028 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1029 struct pcmcia_driver *p_drv = NULL;
1030
1031 if (dev->driver)
1032 p_drv = to_pcmcia_drv(dev->driver);
1033
1034 if (p_drv && p_drv->resume)
1035 return p_drv->resume(p_dev);
1036
1037 return 0;
1038 }
1039
1040
1041 static int pcmcia_bus_suspend_callback(struct device *dev, void * _data)
1042 {
1043 struct pcmcia_socket *skt = _data;
1044 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1045
1046 if (p_dev->socket != skt)
1047 return 0;
1048
1049 return dpm_runtime_suspend(dev, PMSG_SUSPEND);
1050 }
1051
1052 static int pcmcia_bus_resume_callback(struct device *dev, void * _data)
1053 {
1054 struct pcmcia_socket *skt = _data;
1055 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1056
1057 if (p_dev->socket != skt)
1058 return 0;
1059
1060 dpm_runtime_resume(dev);
1061
1062 return 0;
1063 }
1064
1065 static int pcmcia_bus_resume(struct pcmcia_socket *skt)
1066 {
1067 bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback);
1068 return 0;
1069 }
1070
1071 static int pcmcia_bus_suspend(struct pcmcia_socket *skt)
1072 {
1073 if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt,
1074 pcmcia_bus_suspend_callback)) {
1075 pcmcia_bus_resume(skt);
1076 return -EIO;
1077 }
1078 return 0;
1079 }
1080
1081
1082 /*======================================================================
1083
1084 The card status event handler.
1085
1086 ======================================================================*/
1087
1088 /* Normally, the event is passed to individual drivers after
1089 * informing userspace. Only for CS_EVENT_CARD_REMOVAL this
1090 * is inversed to maintain historic compatibility.
1091 */
1092
1093 static int ds_event(struct pcmcia_socket *skt, event_t event, int priority)
1094 {
1095 struct pcmcia_socket *s = pcmcia_get_socket(skt);
1096
1097 ds_dbg(1, "ds_event(0x%06x, %d, 0x%p)\n",
1098 event, priority, skt);
1099
1100 switch (event) {
1101 case CS_EVENT_CARD_REMOVAL:
1102 s->pcmcia_state.present = 0;
1103 pcmcia_card_remove(skt);
1104 handle_event(skt, event);
1105 break;
1106
1107 case CS_EVENT_CARD_INSERTION:
1108 s->pcmcia_state.present = 1;
1109 pcmcia_card_add(skt);
1110 handle_event(skt, event);
1111 break;
1112
1113 case CS_EVENT_EJECTION_REQUEST:
1114 break;
1115
1116 case CS_EVENT_PM_SUSPEND:
1117 case CS_EVENT_PM_RESUME:
1118 case CS_EVENT_RESET_PHYSICAL:
1119 case CS_EVENT_CARD_RESET:
1120 default:
1121 handle_event(skt, event);
1122 break;
1123 }
1124
1125 pcmcia_put_socket(s);
1126
1127 return 0;
1128 } /* ds_event */
1129
1130
1131 static struct pcmcia_callback pcmcia_bus_callback = {
1132 .owner = THIS_MODULE,
1133 .event = ds_event,
1134 .requery = pcmcia_bus_rescan,
1135 .suspend = pcmcia_bus_suspend,
1136 .resume = pcmcia_bus_resume,
1137 };
1138
1139 static int __devinit pcmcia_bus_add_socket(struct class_device *class_dev,
1140 struct class_interface *class_intf)
1141 {
1142 struct pcmcia_socket *socket = class_get_devdata(class_dev);
1143 int ret;
1144
1145 socket = pcmcia_get_socket(socket);
1146 if (!socket) {
1147 printk(KERN_ERR "PCMCIA obtaining reference to socket %p failed\n", socket);
1148 return -ENODEV;
1149 }
1150
1151 /*
1152 * Ugly. But we want to wait for the socket threads to have started up.
1153 * We really should let the drivers themselves drive some of this..
1154 */
1155 msleep(250);
1156
1157 #ifdef CONFIG_PCMCIA_IOCTL
1158 init_waitqueue_head(&socket->queue);
1159 #endif
1160 INIT_LIST_HEAD(&socket->devices_list);
1161 INIT_WORK(&socket->device_add, pcmcia_delayed_add_pseudo_device, socket);
1162 memset(&socket->pcmcia_state, 0, sizeof(u8));
1163 socket->device_count = 0;
1164
1165 ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback);
1166 if (ret) {
1167 printk(KERN_ERR "PCMCIA registration PCCard core failed for socket %p\n", socket);
1168 pcmcia_put_socket(socket);
1169 return (ret);
1170 }
1171
1172 return 0;
1173 }
1174
1175 static void pcmcia_bus_remove_socket(struct class_device *class_dev,
1176 struct class_interface *class_intf)
1177 {
1178 struct pcmcia_socket *socket = class_get_devdata(class_dev);
1179
1180 if (!socket)
1181 return;
1182
1183 socket->pcmcia_state.dead = 1;
1184 pccard_register_pcmcia(socket, NULL);
1185
1186 pcmcia_put_socket(socket);
1187
1188 return;
1189 }
1190
1191
1192 /* the pcmcia_bus_interface is used to handle pcmcia socket devices */
1193 static struct class_interface pcmcia_bus_interface = {
1194 .class = &pcmcia_socket_class,
1195 .add = &pcmcia_bus_add_socket,
1196 .remove = &pcmcia_bus_remove_socket,
1197 };
1198
1199
1200 struct bus_type pcmcia_bus_type = {
1201 .name = "pcmcia",
1202 .uevent = pcmcia_bus_uevent,
1203 .match = pcmcia_bus_match,
1204 .dev_attrs = pcmcia_dev_attrs,
1205 .probe = pcmcia_device_probe,
1206 .remove = pcmcia_device_remove,
1207 .suspend = pcmcia_dev_suspend,
1208 .resume = pcmcia_dev_resume,
1209 };
1210
1211
1212 static int __init init_pcmcia_bus(void)
1213 {
1214 spin_lock_init(&pcmcia_dev_list_lock);
1215
1216 bus_register(&pcmcia_bus_type);
1217 class_interface_register(&pcmcia_bus_interface);
1218
1219 pcmcia_setup_ioctl();
1220
1221 return 0;
1222 }
1223 fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that
1224 * pcmcia_socket_class is already registered */
1225
1226
1227 static void __exit exit_pcmcia_bus(void)
1228 {
1229 pcmcia_cleanup_ioctl();
1230
1231 class_interface_unregister(&pcmcia_bus_interface);
1232
1233 bus_unregister(&pcmcia_bus_type);
1234 }
1235 module_exit(exit_pcmcia_bus);
1236
1237
1238 MODULE_ALIAS("ds");
Linux with added FPC-III support