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[IA64] mca_drv: Add minstate validation
[firewire-audio.git] / drivers / pcmcia / ds.c
blob0a424a4e8187f8c3a80509014acbbb86399af7d0
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
356 static int pcmcia_device_probe(struct device * dev)
357 {
358 struct pcmcia_device *p_dev;
359 struct pcmcia_driver *p_drv;
360 struct pcmcia_socket *s;
361 int ret = 0;
362
363 dev = get_device(dev);
364 if (!dev)
365 return -ENODEV;
366
367 p_dev = to_pcmcia_dev(dev);
368 p_drv = to_pcmcia_drv(dev->driver);
369 s = p_dev->socket;
370
371 if ((!p_drv->probe) || (!try_module_get(p_drv->owner))) {
372 ret = -EINVAL;
373 goto put_dev;
374 }
375
376 p_dev->state &= ~CLIENT_UNBOUND;
377
378 /* set up the device configuration, if it hasn't been done before */
379 if (!s->functions) {
380 cistpl_longlink_mfc_t mfc;
381 if (pccard_read_tuple(s, p_dev->func, CISTPL_LONGLINK_MFC,
382 &mfc) == CS_SUCCESS)
383 s->functions = mfc.nfn;
384 else
385 s->functions = 1;
386 s->config = kzalloc(sizeof(config_t) * s->functions,
387 GFP_KERNEL);
388 if (!s->config) {
389 ret = -ENOMEM;
390 goto put_module;
391 }
392 }
393
394 ret = p_drv->probe(p_dev);
395
396 put_module:
397 if (ret)
398 module_put(p_drv->owner);
399 put_dev:
400 if (ret)
401 put_device(dev);
402 return (ret);
403 }
404
405
406 static int pcmcia_device_remove(struct device * dev)
407 {
408 struct pcmcia_device *p_dev;
409 struct pcmcia_driver *p_drv;
410 int i;
411
412 /* detach the "instance" */
413 p_dev = to_pcmcia_dev(dev);
414 p_drv = to_pcmcia_drv(dev->driver);
415 if (!p_drv)
416 return 0;
417
418 if (p_drv->remove)
419 p_drv->remove(p_dev);
420
421 /* check for proper unloading */
422 if (p_dev->state & (CLIENT_IRQ_REQ|CLIENT_IO_REQ|CLIENT_CONFIG_LOCKED))
423 printk(KERN_INFO "pcmcia: driver %s did not release config properly\n",
424 p_drv->drv.name);
425
426 for (i = 0; i < MAX_WIN; i++)
427 if (p_dev->state & CLIENT_WIN_REQ(i))
428 printk(KERN_INFO "pcmcia: driver %s did not release windows properly\n",
429 p_drv->drv.name);
430
431 /* references from pcmcia_probe_device */
432 p_dev->state = CLIENT_UNBOUND;
433 pcmcia_put_dev(p_dev);
434 module_put(p_drv->owner);
435
436 return 0;
437 }
438
439
440 /*
441 * Removes a PCMCIA card from the device tree and socket list.
442 */
443 static void pcmcia_card_remove(struct pcmcia_socket *s)
444 {
445 struct pcmcia_device *p_dev;
446 unsigned long flags;
447
448 ds_dbg(2, "unbind_request(%d)\n", s->sock);
449
450 s->device_count = 0;
451
452 for (;;) {
453 /* unregister all pcmcia_devices registered with this socket*/
454 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
455 if (list_empty(&s->devices_list)) {
456 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
457 return;
458 }
459 p_dev = list_entry((&s->devices_list)->next, struct pcmcia_device, socket_device_list);
460 list_del(&p_dev->socket_device_list);
461 p_dev->state |= CLIENT_STALE;
462 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
463
464 device_unregister(&p_dev->dev);
465 }
466
467 return;
468 } /* unbind_request */
469
470
471 /*
472 * pcmcia_device_query -- determine information about a pcmcia device
473 */
474 static int pcmcia_device_query(struct pcmcia_device *p_dev)
475 {
476 cistpl_manfid_t manf_id;
477 cistpl_funcid_t func_id;
478 cistpl_vers_1_t *vers1;
479 unsigned int i;
480
481 vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL);
482 if (!vers1)
483 return -ENOMEM;
484
485 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
486 CISTPL_MANFID, &manf_id)) {
487 p_dev->manf_id = manf_id.manf;
488 p_dev->card_id = manf_id.card;
489 p_dev->has_manf_id = 1;
490 p_dev->has_card_id = 1;
491 }
492
493 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
494 CISTPL_FUNCID, &func_id)) {
495 p_dev->func_id = func_id.func;
496 p_dev->has_func_id = 1;
497 } else {
498 /* rule of thumb: cards with no FUNCID, but with
499 * common memory device geometry information, are
500 * probably memory cards (from pcmcia-cs) */
501 cistpl_device_geo_t *devgeo;
502
503 devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL);
504 if (!devgeo) {
505 kfree(vers1);
506 return -ENOMEM;
507 }
508 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
509 CISTPL_DEVICE_GEO, devgeo)) {
510 ds_dbg(0, "mem device geometry probably means "
511 "FUNCID_MEMORY\n");
512 p_dev->func_id = CISTPL_FUNCID_MEMORY;
513 p_dev->has_func_id = 1;
514 }
515 kfree(devgeo);
516 }
517
518 if (!pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_VERS_1,
519 vers1)) {
520 for (i=0; i < vers1->ns; i++) {
521 char *tmp;
522 unsigned int length;
523
524 tmp = vers1->str + vers1->ofs[i];
525
526 length = strlen(tmp) + 1;
527 if ((length < 3) || (length > 255))
528 continue;
529
530 p_dev->prod_id[i] = kmalloc(sizeof(char) * length,
531 GFP_KERNEL);
532 if (!p_dev->prod_id[i])
533 continue;
534
535 p_dev->prod_id[i] = strncpy(p_dev->prod_id[i],
536 tmp, length);
537 }
538 }
539
540 kfree(vers1);
541 return 0;
542 }
543
544
545 /* device_add_lock is needed to avoid double registration by cardmgr and kernel.
546 * Serializes pcmcia_device_add; will most likely be removed in future.
547 *
548 * While it has the caveat that adding new PCMCIA devices inside(!) device_register()
549 * won't work, this doesn't matter much at the moment: the driver core doesn't
550 * support it either.
551 */
552 static DECLARE_MUTEX(device_add_lock);
553
554 struct pcmcia_device * pcmcia_device_add(struct pcmcia_socket *s, unsigned int function)
555 {
556 struct pcmcia_device *p_dev;
557 unsigned long flags;
558 int bus_id_len;
559
560 s = pcmcia_get_socket(s);
561 if (!s)
562 return NULL;
563
564 down(&device_add_lock);
565
566 /* max of 2 devices per card */
567 if (s->device_count == 2)
568 goto err_put;
569
570 p_dev = kzalloc(sizeof(struct pcmcia_device), GFP_KERNEL);
571 if (!p_dev)
572 goto err_put;
573
574 p_dev->socket = s;
575 p_dev->device_no = (s->device_count++);
576 p_dev->func = function;
577
578 p_dev->dev.bus = &pcmcia_bus_type;
579 p_dev->dev.parent = s->dev.dev;
580 p_dev->dev.release = pcmcia_release_dev;
581 bus_id_len = sprintf (p_dev->dev.bus_id, "%d.%d", p_dev->socket->sock, p_dev->device_no);
582
583 p_dev->devname = kmalloc(6 + bus_id_len + 1, GFP_KERNEL);
584 if (!p_dev->devname)
585 goto err_free;
586 sprintf (p_dev->devname, "pcmcia%s", p_dev->dev.bus_id);
587
588 /* compat */
589 p_dev->state = CLIENT_UNBOUND;
590
591 /* Add to the list in pcmcia_bus_socket */
592 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
593 list_add_tail(&p_dev->socket_device_list, &s->devices_list);
594 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
595
596 printk(KERN_NOTICE "pcmcia: registering new device %s\n",
597 p_dev->devname);
598
599 pcmcia_device_query(p_dev);
600
601 if (device_register(&p_dev->dev)) {
602 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
603 list_del(&p_dev->socket_device_list);
604 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
605
606 goto err_free;
607 }
608
609 up(&device_add_lock);
610
611 return p_dev;
612
613 err_free:
614 kfree(p_dev->devname);
615 kfree(p_dev);
616 s->device_count--;
617 err_put:
618 up(&device_add_lock);
619 pcmcia_put_socket(s);
620
621 return NULL;
622 }
623
624
625 static int pcmcia_card_add(struct pcmcia_socket *s)
626 {
627 cisinfo_t cisinfo;
628 cistpl_longlink_mfc_t mfc;
629 unsigned int no_funcs, i;
630 int ret = 0;
631
632 if (!(s->resource_setup_done))
633 return -EAGAIN; /* try again, but later... */
634
635 if (pcmcia_validate_mem(s))
636 return -EAGAIN; /* try again, but later... */
637
638 ret = pccard_validate_cis(s, BIND_FN_ALL, &cisinfo);
639 if (ret || !cisinfo.Chains) {
640 ds_dbg(0, "invalid CIS or invalid resources\n");
641 return -ENODEV;
642 }
643
644 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
645 no_funcs = mfc.nfn;
646 else
647 no_funcs = 1;
648
649 for (i=0; i < no_funcs; i++)
650 pcmcia_device_add(s, i);
651
652 return (ret);
653 }
654
655
656 static void pcmcia_delayed_add_pseudo_device(void *data)
657 {
658 struct pcmcia_socket *s = data;
659 pcmcia_device_add(s, 0);
660 s->pcmcia_state.device_add_pending = 0;
661 }
662
663 static inline void pcmcia_add_pseudo_device(struct pcmcia_socket *s)
664 {
665 if (!s->pcmcia_state.device_add_pending) {
666 s->pcmcia_state.device_add_pending = 1;
667 schedule_work(&s->device_add);
668 }
669 return;
670 }
671
672 static int pcmcia_requery(struct device *dev, void * _data)
673 {
674 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
675 if (!p_dev->dev.driver)
676 pcmcia_device_query(p_dev);
677
678 return 0;
679 }
680
681 static void pcmcia_bus_rescan(struct pcmcia_socket *skt)
682 {
683 int no_devices=0;
684 unsigned long flags;
685
686 /* must be called with skt_sem held */
687 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
688 if (list_empty(&skt->devices_list))
689 no_devices=1;
690 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
691
692 /* if no devices were added for this socket yet because of
693 * missing resource information or other trouble, we need to
694 * do this now. */
695 if (no_devices) {
696 int ret = pcmcia_card_add(skt);
697 if (ret)
698 return;
699 }
700
701 /* some device information might have changed because of a CIS
702 * update or because we can finally read it correctly... so
703 * determine it again, overwriting old values if necessary. */
704 bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery);
705
706 /* we re-scan all devices, not just the ones connected to this
707 * socket. This does not matter, though. */
708 bus_rescan_devices(&pcmcia_bus_type);
709 }
710
711 static inline int pcmcia_devmatch(struct pcmcia_device *dev,
712 struct pcmcia_device_id *did)
713 {
714 if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
715 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
716 return 0;
717 }
718
719 if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
720 if ((!dev->has_card_id) || (dev->card_id != did->card_id))
721 return 0;
722 }
723
724 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
725 if (dev->func != did->function)
726 return 0;
727 }
728
729 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
730 if (!dev->prod_id[0])
731 return 0;
732 if (strcmp(did->prod_id[0], dev->prod_id[0]))
733 return 0;
734 }
735
736 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
737 if (!dev->prod_id[1])
738 return 0;
739 if (strcmp(did->prod_id[1], dev->prod_id[1]))
740 return 0;
741 }
742
743 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
744 if (!dev->prod_id[2])
745 return 0;
746 if (strcmp(did->prod_id[2], dev->prod_id[2]))
747 return 0;
748 }
749
750 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
751 if (!dev->prod_id[3])
752 return 0;
753 if (strcmp(did->prod_id[3], dev->prod_id[3]))
754 return 0;
755 }
756
757 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
758 /* handle pseudo multifunction devices:
759 * there are at most two pseudo multifunction devices.
760 * if we're matching against the first, schedule a
761 * call which will then check whether there are two
762 * pseudo devices, and if not, add the second one.
763 */
764 if (dev->device_no == 0)
765 pcmcia_add_pseudo_device(dev->socket);
766
767 if (dev->device_no != did->device_no)
768 return 0;
769 }
770
771 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
772 if ((!dev->has_func_id) || (dev->func_id != did->func_id))
773 return 0;
774
775 /* if this is a pseudo-multi-function device,
776 * we need explicit matches */
777 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO)
778 return 0;
779 if (dev->device_no)
780 return 0;
781
782 /* also, FUNC_ID matching needs to be activated by userspace
783 * after it has re-checked that there is no possible module
784 * with a prod_id/manf_id/card_id match.
785 */
786 if (!dev->allow_func_id_match)
787 return 0;
788 }
789
790 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
791 if (!dev->socket->fake_cis)
792 pcmcia_load_firmware(dev, did->cisfile);
793
794 if (!dev->socket->fake_cis)
795 return 0;
796 }
797
798 if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
799 int i;
800 for (i=0; i<4; i++)
801 if (dev->prod_id[i])
802 return 0;
803 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
804 return 0;
805 }
806
807 dev->dev.driver_data = (void *) did;
808
809 return 1;
810 }
811
812
813 static int pcmcia_bus_match(struct device * dev, struct device_driver * drv) {
814 struct pcmcia_device * p_dev = to_pcmcia_dev(dev);
815 struct pcmcia_driver * p_drv = to_pcmcia_drv(drv);
816 struct pcmcia_device_id *did = p_drv->id_table;
817
818 /* matching by cardmgr */
819 if (p_dev->cardmgr == p_drv)
820 return 1;
821
822 while (did && did->match_flags) {
823 if (pcmcia_devmatch(p_dev, did))
824 return 1;
825 did++;
826 }
827
828 return 0;
829 }
830
831 #ifdef CONFIG_HOTPLUG
832
833 static int pcmcia_bus_uevent(struct device *dev, char **envp, int num_envp,
834 char *buffer, int buffer_size)
835 {
836 struct pcmcia_device *p_dev;
837 int i, length = 0;
838 u32 hash[4] = { 0, 0, 0, 0};
839
840 if (!dev)
841 return -ENODEV;
842
843 p_dev = to_pcmcia_dev(dev);
844
845 /* calculate hashes */
846 for (i=0; i<4; i++) {
847 if (!p_dev->prod_id[i])
848 continue;
849 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
850 }
851
852 i = 0;
853
854 if (add_uevent_var(envp, num_envp, &i,
855 buffer, buffer_size, &length,
856 "SOCKET_NO=%u",
857 p_dev->socket->sock))
858 return -ENOMEM;
859
860 if (add_uevent_var(envp, num_envp, &i,
861 buffer, buffer_size, &length,
862 "DEVICE_NO=%02X",
863 p_dev->device_no))
864 return -ENOMEM;
865
866 if (add_uevent_var(envp, num_envp, &i,
867 buffer, buffer_size, &length,
868 "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
869 "pa%08Xpb%08Xpc%08Xpd%08X",
870 p_dev->has_manf_id ? p_dev->manf_id : 0,
871 p_dev->has_card_id ? p_dev->card_id : 0,
872 p_dev->has_func_id ? p_dev->func_id : 0,
873 p_dev->func,
874 p_dev->device_no,
875 hash[0],
876 hash[1],
877 hash[2],
878 hash[3]))
879 return -ENOMEM;
880
881 envp[i] = NULL;
882
883 return 0;
884 }
885
886 #else
887
888 static int pcmcia_bus_uevent(struct device *dev, char **envp, int num_envp,
889 char *buffer, int buffer_size)
890 {
891 return -ENODEV;
892 }
893
894 #endif
895
896 /************************ per-device sysfs output ***************************/
897
898 #define pcmcia_device_attr(field, test, format) \
899 static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf) \
900 { \
901 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
902 return p_dev->test ? sprintf (buf, format, p_dev->field) : -ENODEV; \
903 }
904
905 #define pcmcia_device_stringattr(name, field) \
906 static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf) \
907 { \
908 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
909 return p_dev->field ? sprintf (buf, "%s\n", p_dev->field) : -ENODEV; \
910 }
911
912 pcmcia_device_attr(func, socket, "0x%02x\n");
913 pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
914 pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
915 pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
916 pcmcia_device_stringattr(prod_id1, prod_id[0]);
917 pcmcia_device_stringattr(prod_id2, prod_id[1]);
918 pcmcia_device_stringattr(prod_id3, prod_id[2]);
919 pcmcia_device_stringattr(prod_id4, prod_id[3]);
920
921
922 static ssize_t pcmcia_show_pm_state(struct device *dev, struct device_attribute *attr, char *buf)
923 {
924 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
925
926 if (p_dev->dev.power.power_state.event != PM_EVENT_ON)
927 return sprintf(buf, "off\n");
928 else
929 return sprintf(buf, "on\n");
930 }
931
932 static ssize_t pcmcia_store_pm_state(struct device *dev, struct device_attribute *attr,
933 const char *buf, size_t count)
934 {
935 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
936 int ret = 0;
937
938 if (!count)
939 return -EINVAL;
940
941 if ((p_dev->dev.power.power_state.event == PM_EVENT_ON) &&
942 (!strncmp(buf, "off", 3)))
943 ret = dpm_runtime_suspend(dev, PMSG_SUSPEND);
944 else if ((p_dev->dev.power.power_state.event != PM_EVENT_ON) &&
945 (!strncmp(buf, "on", 2)))
946 dpm_runtime_resume(dev);
947
948 return ret ? ret : count;
949 }
950
951
952 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
953 {
954 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
955 int i;
956 u32 hash[4] = { 0, 0, 0, 0};
957
958 /* calculate hashes */
959 for (i=0; i<4; i++) {
960 if (!p_dev->prod_id[i])
961 continue;
962 hash[i] = crc32(0,p_dev->prod_id[i],strlen(p_dev->prod_id[i]));
963 }
964 return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
965 "pa%08Xpb%08Xpc%08Xpd%08X\n",
966 p_dev->has_manf_id ? p_dev->manf_id : 0,
967 p_dev->has_card_id ? p_dev->card_id : 0,
968 p_dev->has_func_id ? p_dev->func_id : 0,
969 p_dev->func, p_dev->device_no,
970 hash[0], hash[1], hash[2], hash[3]);
971 }
972
973 static ssize_t pcmcia_store_allow_func_id_match(struct device *dev,
974 struct device_attribute *attr, const char *buf, size_t count)
975 {
976 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
977
978 if (!count)
979 return -EINVAL;
980
981 down(&p_dev->socket->skt_sem);
982 p_dev->allow_func_id_match = 1;
983 up(&p_dev->socket->skt_sem);
984
985 bus_rescan_devices(&pcmcia_bus_type);
986
987 return count;
988 }
989
990 static struct device_attribute pcmcia_dev_attrs[] = {
991 __ATTR(function, 0444, func_show, NULL),
992 __ATTR(pm_state, 0644, pcmcia_show_pm_state, pcmcia_store_pm_state),
993 __ATTR_RO(func_id),
994 __ATTR_RO(manf_id),
995 __ATTR_RO(card_id),
996 __ATTR_RO(prod_id1),
997 __ATTR_RO(prod_id2),
998 __ATTR_RO(prod_id3),
999 __ATTR_RO(prod_id4),
1000 __ATTR_RO(modalias),
1001 __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match),
1002 __ATTR_NULL,
1003 };
1004
1005 /* PM support, also needed for reset */
1006
1007 static int pcmcia_dev_suspend(struct device * dev, pm_message_t state)
1008 {
1009 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1010 struct pcmcia_driver *p_drv = NULL;
1011
1012 if (dev->driver)
1013 p_drv = to_pcmcia_drv(dev->driver);
1014
1015 if (p_drv && p_drv->suspend)
1016 return p_drv->suspend(p_dev);
1017
1018 return 0;
1019 }
1020
1021
1022 static int pcmcia_dev_resume(struct device * dev)
1023 {
1024 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1025 struct pcmcia_driver *p_drv = NULL;
1026
1027 if (dev->driver)
1028 p_drv = to_pcmcia_drv(dev->driver);
1029
1030 if (p_drv && p_drv->resume)
1031 return p_drv->resume(p_dev);
1032
1033 return 0;
1034 }
1035
1036
1037 static int pcmcia_bus_suspend_callback(struct device *dev, void * _data)
1038 {
1039 struct pcmcia_socket *skt = _data;
1040 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1041
1042 if (p_dev->socket != skt)
1043 return 0;
1044
1045 return dpm_runtime_suspend(dev, PMSG_SUSPEND);
1046 }
1047
1048 static int pcmcia_bus_resume_callback(struct device *dev, void * _data)
1049 {
1050 struct pcmcia_socket *skt = _data;
1051 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1052
1053 if (p_dev->socket != skt)
1054 return 0;
1055
1056 dpm_runtime_resume(dev);
1057
1058 return 0;
1059 }
1060
1061 static int pcmcia_bus_resume(struct pcmcia_socket *skt)
1062 {
1063 bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback);
1064 return 0;
1065 }
1066
1067 static int pcmcia_bus_suspend(struct pcmcia_socket *skt)
1068 {
1069 if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt,
1070 pcmcia_bus_suspend_callback)) {
1071 pcmcia_bus_resume(skt);
1072 return -EIO;
1073 }
1074 return 0;
1075 }
1076
1077
1078 /*======================================================================
1079
1080 The card status event handler.
1081
1082 ======================================================================*/
1083
1084 /* Normally, the event is passed to individual drivers after
1085 * informing userspace. Only for CS_EVENT_CARD_REMOVAL this
1086 * is inversed to maintain historic compatibility.
1087 */
1088
1089 static int ds_event(struct pcmcia_socket *skt, event_t event, int priority)
1090 {
1091 struct pcmcia_socket *s = pcmcia_get_socket(skt);
1092
1093 ds_dbg(1, "ds_event(0x%06x, %d, 0x%p)\n",
1094 event, priority, skt);
1095
1096 switch (event) {
1097 case CS_EVENT_CARD_REMOVAL:
1098 s->pcmcia_state.present = 0;
1099 pcmcia_card_remove(skt);
1100 handle_event(skt, event);
1101 break;
1102
1103 case CS_EVENT_CARD_INSERTION:
1104 s->pcmcia_state.present = 1;
1105 pcmcia_card_add(skt);
1106 handle_event(skt, event);
1107 break;
1108
1109 case CS_EVENT_EJECTION_REQUEST:
1110 break;
1111
1112 case CS_EVENT_PM_SUSPEND:
1113 case CS_EVENT_PM_RESUME:
1114 case CS_EVENT_RESET_PHYSICAL:
1115 case CS_EVENT_CARD_RESET:
1116 default:
1117 handle_event(skt, event);
1118 break;
1119 }
1120
1121 pcmcia_put_socket(s);
1122
1123 return 0;
1124 } /* ds_event */
1125
1126
1127 static struct pcmcia_callback pcmcia_bus_callback = {
1128 .owner = THIS_MODULE,
1129 .event = ds_event,
1130 .requery = pcmcia_bus_rescan,
1131 .suspend = pcmcia_bus_suspend,
1132 .resume = pcmcia_bus_resume,
1133 };
1134
1135 static int __devinit pcmcia_bus_add_socket(struct class_device *class_dev,
1136 struct class_interface *class_intf)
1137 {
1138 struct pcmcia_socket *socket = class_get_devdata(class_dev);
1139 int ret;
1140
1141 socket = pcmcia_get_socket(socket);
1142 if (!socket) {
1143 printk(KERN_ERR "PCMCIA obtaining reference to socket %p failed\n", socket);
1144 return -ENODEV;
1145 }
1146
1147 /*
1148 * Ugly. But we want to wait for the socket threads to have started up.
1149 * We really should let the drivers themselves drive some of this..
1150 */
1151 msleep(250);
1152
1153 #ifdef CONFIG_PCMCIA_IOCTL
1154 init_waitqueue_head(&socket->queue);
1155 #endif
1156 INIT_LIST_HEAD(&socket->devices_list);
1157 INIT_WORK(&socket->device_add, pcmcia_delayed_add_pseudo_device, socket);
1158 memset(&socket->pcmcia_state, 0, sizeof(u8));
1159 socket->device_count = 0;
1160
1161 ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback);
1162 if (ret) {
1163 printk(KERN_ERR "PCMCIA registration PCCard core failed for socket %p\n", socket);
1164 pcmcia_put_socket(socket);
1165 return (ret);
1166 }
1167
1168 return 0;
1169 }
1170
1171 static void pcmcia_bus_remove_socket(struct class_device *class_dev,
1172 struct class_interface *class_intf)
1173 {
1174 struct pcmcia_socket *socket = class_get_devdata(class_dev);
1175
1176 if (!socket)
1177 return;
1178
1179 socket->pcmcia_state.dead = 1;
1180 pccard_register_pcmcia(socket, NULL);
1181
1182 pcmcia_put_socket(socket);
1183
1184 return;
1185 }
1186
1187
1188 /* the pcmcia_bus_interface is used to handle pcmcia socket devices */
1189 static struct class_interface pcmcia_bus_interface = {
1190 .class = &pcmcia_socket_class,
1191 .add = &pcmcia_bus_add_socket,
1192 .remove = &pcmcia_bus_remove_socket,
1193 };
1194
1195
1196 struct bus_type pcmcia_bus_type = {
1197 .name = "pcmcia",
1198 .uevent = pcmcia_bus_uevent,
1199 .match = pcmcia_bus_match,
1200 .dev_attrs = pcmcia_dev_attrs,
1201 .probe = pcmcia_device_probe,
1202 .remove = pcmcia_device_remove,
1203 .suspend = pcmcia_dev_suspend,
1204 .resume = pcmcia_dev_resume,
1205 };
1206
1207
1208 static int __init init_pcmcia_bus(void)
1209 {
1210 spin_lock_init(&pcmcia_dev_list_lock);
1211
1212 bus_register(&pcmcia_bus_type);
1213 class_interface_register(&pcmcia_bus_interface);
1214
1215 pcmcia_setup_ioctl();
1216
1217 return 0;
1218 }
1219 fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that
1220 * pcmcia_socket_class is already registered */
1221
1222
1223 static void __exit exit_pcmcia_bus(void)
1224 {
1225 pcmcia_cleanup_ioctl();
1226
1227 class_interface_unregister(&pcmcia_bus_interface);
1228
1229 bus_unregister(&pcmcia_bus_type);
1230 }
1231 module_exit(exit_pcmcia_bus);
1232
1233
1234 MODULE_ALIAS("ds");
AMDTP streaming driver for the Linux FireWire stack (Juju)