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[deliverable/linux.git] / drivers / pcmcia / ds.c
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1/*
2 * ds.c -- 16-bit PCMCIA core support
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
7 *
8 * The initial developer of the original code is David A. Hinds
9 * <dahinds@users.sourceforge.net>. Portions created by David A. Hinds
10 * are Copyright (C) 1999 David A. Hinds. All Rights Reserved.
11 *
12 * (C) 1999 David A. Hinds
13 * (C) 2003 - 2006 Dominik Brodowski
14 */
15
16#include <linux/kernel.h>
17#include <linux/module.h>
18#include <linux/init.h>
19#include <linux/errno.h>
20#include <linux/list.h>
21#include <linux/delay.h>
22#include <linux/workqueue.h>
23#include <linux/crc32.h>
24#include <linux/firmware.h>
25#include <linux/kref.h>
26
27#define IN_CARD_SERVICES
28#include <pcmcia/cs_types.h>
29#include <pcmcia/cs.h>
30#include <pcmcia/cistpl.h>
31#include <pcmcia/ds.h>
32#include <pcmcia/ss.h>
33
34#include "cs_internal.h"
35#include "ds_internal.h"
36
37/*====================================================================*/
38
39/* Module parameters */
40
41MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
42MODULE_DESCRIPTION("PCMCIA Driver Services");
43MODULE_LICENSE("GPL");
44
45#ifdef DEBUG
46int ds_pc_debug;
47
48module_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
58spinlock_t pcmcia_dev_list_lock;
59
60/*====================================================================*/
61
62/* code which was in cs.c before */
63
64/* String tables for error messages */
65
66typedef struct lookup_t {
67 int key;
68 char *msg;
69} lookup_t;
70
71static 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
106static 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
159static 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
192void 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}
197EXPORT_SYMBOL(cs_error);
198
199
200static 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/
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/ in userspace.
244 */
245static 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
285static 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 */
301int pcmcia_register_driver(struct pcmcia_driver *driver)
302{
303 if (!driver)
304 return -EINVAL;
305
306 pcmcia_check_driver(driver);
307
308 /* initialize common fields */
309 driver->drv.bus = &pcmcia_bus_type;
310 driver->drv.owner = driver->owner;
311
312 return driver_register(&driver->drv);
313}
314EXPORT_SYMBOL(pcmcia_register_driver);
315
316/**
317 * pcmcia_unregister_driver - unregister a PCMCIA driver with the bus core
318 */
319void pcmcia_unregister_driver(struct pcmcia_driver *driver)
320{
321 driver_unregister(&driver->drv);
322}
323EXPORT_SYMBOL(pcmcia_unregister_driver);
324
325
326/* pcmcia_device handling */
327
328struct pcmcia_device * pcmcia_get_dev(struct pcmcia_device *p_dev)
329{
330 struct device *tmp_dev;
331 tmp_dev = get_device(&p_dev->dev);
332 if (!tmp_dev)
333 return NULL;
334 return to_pcmcia_dev(tmp_dev);
335}
336
337void pcmcia_put_dev(struct pcmcia_device *p_dev)
338{
339 if (p_dev)
340 put_device(&p_dev->dev);
341}
342
343static void pcmcia_release_function(struct kref *ref)
344{
345 struct config_t *c = container_of(ref, struct config_t, ref);
346 kfree(c);
347}
348
349static void pcmcia_release_dev(struct device *dev)
350{
351 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
352 ds_dbg(1, "releasing dev %p\n", p_dev);
353 pcmcia_put_socket(p_dev->socket);
354 kfree(p_dev->devname);
355 kref_put(&p_dev->function_config->ref, pcmcia_release_function);
356 kfree(p_dev);
357}
358
359static void pcmcia_add_pseudo_device(struct pcmcia_socket *s)
360{
361 if (!s->pcmcia_state.device_add_pending) {
362 s->pcmcia_state.device_add_pending = 1;
363 schedule_work(&s->device_add);
364 }
365 return;
366}
367
368static int pcmcia_device_probe(struct device * dev)
369{
370 struct pcmcia_device *p_dev;
371 struct pcmcia_driver *p_drv;
372 struct pcmcia_device_id *did;
373 struct pcmcia_socket *s;
374 int ret = 0;
375
376 dev = get_device(dev);
377 if (!dev)
378 return -ENODEV;
379
380 p_dev = to_pcmcia_dev(dev);
381 p_drv = to_pcmcia_drv(dev->driver);
382 s = p_dev->socket;
383
384 if ((!p_drv->probe) || (!p_dev->function_config) ||
385 (!try_module_get(p_drv->owner))) {
386 ret = -EINVAL;
387 goto put_dev;
388 }
389
390 ret = p_drv->probe(p_dev);
391 if (ret)
392 goto put_module;
393
394 /* handle pseudo multifunction devices:
395 * there are at most two pseudo multifunction devices.
396 * if we're matching against the first, schedule a
397 * call which will then check whether there are two
398 * pseudo devices, and if not, add the second one.
399 */
400 did = p_dev->dev.driver_data;
401 if (did && (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) &&
402 (p_dev->socket->device_count == 1) && (p_dev->device_no == 0))
403 pcmcia_add_pseudo_device(p_dev->socket);
404
405 put_module:
406 if (ret)
407 module_put(p_drv->owner);
408 put_dev:
409 if (ret)
410 put_device(dev);
411 return (ret);
412}
413
414
415/*
416 * Removes a PCMCIA card from the device tree and socket list.
417 */
418static void pcmcia_card_remove(struct pcmcia_socket *s, struct pcmcia_device *leftover)
419{
420 struct pcmcia_device *p_dev;
421 struct pcmcia_device *tmp;
422 unsigned long flags;
423
424 ds_dbg(2, "unbind_request(%d)\n", s->sock);
425
426
427 if (!leftover)
428 s->device_count = 0;
429 else
430 s->device_count = 1;
431
432 /* unregister all pcmcia_devices registered with this socket, except leftover */
433 list_for_each_entry_safe(p_dev, tmp, &s->devices_list, socket_device_list) {
434 if (p_dev == leftover)
435 continue;
436
437 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
438 list_del(&p_dev->socket_device_list);
439 p_dev->_removed=1;
440 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
441
442 device_unregister(&p_dev->dev);
443 }
444
445 return;
446}
447
448static int pcmcia_device_remove(struct device * dev)
449{
450 struct pcmcia_device *p_dev;
451 struct pcmcia_driver *p_drv;
452 struct pcmcia_device_id *did;
453 int i;
454
455 p_dev = to_pcmcia_dev(dev);
456 p_drv = to_pcmcia_drv(dev->driver);
457
458 /* If we're removing the primary module driving a
459 * pseudo multi-function card, we need to unbind
460 * all devices
461 */
462 did = p_dev->dev.driver_data;
463 if (did && (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) &&
464 (p_dev->socket->device_count != 0) &&
465 (p_dev->device_no == 0))
466 pcmcia_card_remove(p_dev->socket, p_dev);
467
468 /* detach the "instance" */
469 if (!p_drv)
470 return 0;
471
472 if (p_drv->remove)
473 p_drv->remove(p_dev);
474
475 p_dev->dev_node = NULL;
476
477 /* check for proper unloading */
478 if (p_dev->_irq || p_dev->_io || p_dev->_locked)
479 printk(KERN_INFO "pcmcia: driver %s did not release config properly\n",
480 p_drv->drv.name);
481
482 for (i = 0; i < MAX_WIN; i++)
483 if (p_dev->_win & CLIENT_WIN_REQ(i))
484 printk(KERN_INFO "pcmcia: driver %s did not release windows properly\n",
485 p_drv->drv.name);
486
487 /* references from pcmcia_probe_device */
488 pcmcia_put_dev(p_dev);
489 module_put(p_drv->owner);
490
491 return 0;
492}
493
494
495/*
496 * pcmcia_device_query -- determine information about a pcmcia device
497 */
498static int pcmcia_device_query(struct pcmcia_device *p_dev)
499{
500 cistpl_manfid_t manf_id;
501 cistpl_funcid_t func_id;
502 cistpl_vers_1_t *vers1;
503 unsigned int i;
504
505 vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL);
506 if (!vers1)
507 return -ENOMEM;
508
509 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
510 CISTPL_MANFID, &manf_id)) {
511 p_dev->manf_id = manf_id.manf;
512 p_dev->card_id = manf_id.card;
513 p_dev->has_manf_id = 1;
514 p_dev->has_card_id = 1;
515 }
516
517 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
518 CISTPL_FUNCID, &func_id)) {
519 p_dev->func_id = func_id.func;
520 p_dev->has_func_id = 1;
521 } else {
522 /* rule of thumb: cards with no FUNCID, but with
523 * common memory device geometry information, are
524 * probably memory cards (from pcmcia-cs) */
525 cistpl_device_geo_t *devgeo;
526
527 devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL);
528 if (!devgeo) {
529 kfree(vers1);
530 return -ENOMEM;
531 }
532 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
533 CISTPL_DEVICE_GEO, devgeo)) {
534 ds_dbg(0, "mem device geometry probably means "
535 "FUNCID_MEMORY\n");
536 p_dev->func_id = CISTPL_FUNCID_MEMORY;
537 p_dev->has_func_id = 1;
538 }
539 kfree(devgeo);
540 }
541
542 if (!pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_VERS_1,
543 vers1)) {
544 for (i=0; i < vers1->ns; i++) {
545 char *tmp;
546 unsigned int length;
547
548 tmp = vers1->str + vers1->ofs[i];
549
550 length = strlen(tmp) + 1;
551 if ((length < 2) || (length > 255))
552 continue;
553
554 p_dev->prod_id[i] = kmalloc(sizeof(char) * length,
555 GFP_KERNEL);
556 if (!p_dev->prod_id[i])
557 continue;
558
559 p_dev->prod_id[i] = strncpy(p_dev->prod_id[i],
560 tmp, length);
561 }
562 }
563
564 kfree(vers1);
565 return 0;
566}
567
568
569/* device_add_lock is needed to avoid double registration by cardmgr and kernel.
570 * Serializes pcmcia_device_add; will most likely be removed in future.
571 *
572 * While it has the caveat that adding new PCMCIA devices inside(!) device_register()
573 * won't work, this doesn't matter much at the moment: the driver core doesn't
574 * support it either.
575 */
576static DEFINE_MUTEX(device_add_lock);
577
578struct pcmcia_device * pcmcia_device_add(struct pcmcia_socket *s, unsigned int function)
579{
580 struct pcmcia_device *p_dev, *tmp_dev;
581 unsigned long flags;
582 int bus_id_len;
583
584 s = pcmcia_get_socket(s);
585 if (!s)
586 return NULL;
587
588 mutex_lock(&device_add_lock);
589
590 /* max of 2 devices per card */
591 if (s->device_count == 2)
592 goto err_put;
593
594 p_dev = kzalloc(sizeof(struct pcmcia_device), GFP_KERNEL);
595 if (!p_dev)
596 goto err_put;
597
598 p_dev->socket = s;
599 p_dev->device_no = (s->device_count++);
600 p_dev->func = function;
601 if (s->functions <= function)
602 s->functions = function + 1;
603
604 p_dev->dev.bus = &pcmcia_bus_type;
605 p_dev->dev.parent = s->dev.dev;
606 p_dev->dev.release = pcmcia_release_dev;
607 bus_id_len = sprintf (p_dev->dev.bus_id, "%d.%d", p_dev->socket->sock, p_dev->device_no);
608
609 p_dev->devname = kmalloc(6 + bus_id_len + 1, GFP_KERNEL);
610 if (!p_dev->devname)
611 goto err_free;
612 sprintf (p_dev->devname, "pcmcia%s", p_dev->dev.bus_id);
613
614 /* compat */
615 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
616
617 /*
618 * p_dev->function_config must be the same for all card functions.
619 * Note that this is serialized by the device_add_lock, so that
620 * only one such struct will be created.
621 */
622 list_for_each_entry(tmp_dev, &s->devices_list, socket_device_list)
623 if (p_dev->func == tmp_dev->func) {
624 p_dev->function_config = tmp_dev->function_config;
625 kref_get(&p_dev->function_config->ref);
626 }
627
628 /* Add to the list in pcmcia_bus_socket */
629 list_add(&p_dev->socket_device_list, &s->devices_list);
630
631 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
632
633 if (!p_dev->function_config) {
634 p_dev->function_config = kzalloc(sizeof(struct config_t),
635 GFP_KERNEL);
636 if (!p_dev->function_config)
637 goto err_unreg;
638 kref_init(&p_dev->function_config->ref);
639 }
640
641 printk(KERN_NOTICE "pcmcia: registering new device %s\n",
642 p_dev->devname);
643
644 pcmcia_device_query(p_dev);
645
646 if (device_register(&p_dev->dev))
647 goto err_unreg;
648
649 mutex_unlock(&device_add_lock);
650
651 return p_dev;
652
653 err_unreg:
654 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
655 list_del(&p_dev->socket_device_list);
656 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
657
658 err_free:
659 kfree(p_dev->devname);
660 kfree(p_dev);
661 s->device_count--;
662 err_put:
663 mutex_unlock(&device_add_lock);
664 pcmcia_put_socket(s);
665
666 return NULL;
667}
668
669
670static int pcmcia_card_add(struct pcmcia_socket *s)
671{
672 cisinfo_t cisinfo;
673 cistpl_longlink_mfc_t mfc;
674 unsigned int no_funcs, i;
675 int ret = 0;
676
677 if (!(s->resource_setup_done))
678 return -EAGAIN; /* try again, but later... */
679
680 if (pcmcia_validate_mem(s))
681 return -EAGAIN; /* try again, but later... */
682
683 ret = pccard_validate_cis(s, BIND_FN_ALL, &cisinfo);
684 if (ret || !cisinfo.Chains) {
685 ds_dbg(0, "invalid CIS or invalid resources\n");
686 return -ENODEV;
687 }
688
689 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
690 no_funcs = mfc.nfn;
691 else
692 no_funcs = 1;
693
694 for (i=0; i < no_funcs; i++)
695 pcmcia_device_add(s, i);
696
697 return (ret);
698}
699
700
701static void pcmcia_delayed_add_pseudo_device(struct work_struct *work)
702{
703 struct pcmcia_socket *s =
704 container_of(work, struct pcmcia_socket, device_add);
705 pcmcia_device_add(s, 0);
706 s->pcmcia_state.device_add_pending = 0;
707}
708
709static int pcmcia_requery(struct device *dev, void * _data)
710{
711 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
712 if (!p_dev->dev.driver)
713 pcmcia_device_query(p_dev);
714
715 return 0;
716}
717
718static void pcmcia_bus_rescan(struct pcmcia_socket *skt)
719{
720 int no_devices=0;
721 int ret = 0;
722 unsigned long flags;
723
724 /* must be called with skt_mutex held */
725 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
726 if (list_empty(&skt->devices_list))
727 no_devices=1;
728 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
729
730 /* if no devices were added for this socket yet because of
731 * missing resource information or other trouble, we need to
732 * do this now. */
733 if (no_devices) {
734 ret = pcmcia_card_add(skt);
735 if (ret)
736 return;
737 }
738
739 /* some device information might have changed because of a CIS
740 * update or because we can finally read it correctly... so
741 * determine it again, overwriting old values if necessary. */
742 bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery);
743
744 /* we re-scan all devices, not just the ones connected to this
745 * socket. This does not matter, though. */
746 ret = bus_rescan_devices(&pcmcia_bus_type);
747 if (ret)
748 printk(KERN_INFO "pcmcia: bus_rescan_devices failed\n");
749}
750
751static inline int pcmcia_devmatch(struct pcmcia_device *dev,
752 struct pcmcia_device_id *did)
753{
754 if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
755 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
756 return 0;
757 }
758
759 if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
760 if ((!dev->has_card_id) || (dev->card_id != did->card_id))
761 return 0;
762 }
763
764 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
765 if (dev->func != did->function)
766 return 0;
767 }
768
769 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
770 if (!dev->prod_id[0])
771 return 0;
772 if (strcmp(did->prod_id[0], dev->prod_id[0]))
773 return 0;
774 }
775
776 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
777 if (!dev->prod_id[1])
778 return 0;
779 if (strcmp(did->prod_id[1], dev->prod_id[1]))
780 return 0;
781 }
782
783 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
784 if (!dev->prod_id[2])
785 return 0;
786 if (strcmp(did->prod_id[2], dev->prod_id[2]))
787 return 0;
788 }
789
790 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
791 if (!dev->prod_id[3])
792 return 0;
793 if (strcmp(did->prod_id[3], dev->prod_id[3]))
794 return 0;
795 }
796
797 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
798 if (dev->device_no != did->device_no)
799 return 0;
800 }
801
802 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
803 if ((!dev->has_func_id) || (dev->func_id != did->func_id))
804 return 0;
805
806 /* if this is a pseudo-multi-function device,
807 * we need explicit matches */
808 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO)
809 return 0;
810 if (dev->device_no)
811 return 0;
812
813 /* also, FUNC_ID matching needs to be activated by userspace
814 * after it has re-checked that there is no possible module
815 * with a prod_id/manf_id/card_id match.
816 */
817 if (!dev->allow_func_id_match)
818 return 0;
819 }
820
821 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
822 if (!dev->socket->fake_cis)
823 pcmcia_load_firmware(dev, did->cisfile);
824
825 if (!dev->socket->fake_cis)
826 return 0;
827 }
828
829 if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
830 int i;
831 for (i=0; i<4; i++)
832 if (dev->prod_id[i])
833 return 0;
834 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
835 return 0;
836 }
837
838 dev->dev.driver_data = (void *) did;
839
840 return 1;
841}
842
843
844static int pcmcia_bus_match(struct device * dev, struct device_driver * drv) {
845 struct pcmcia_device * p_dev = to_pcmcia_dev(dev);
846 struct pcmcia_driver * p_drv = to_pcmcia_drv(drv);
847 struct pcmcia_device_id *did = p_drv->id_table;
848
849#ifdef CONFIG_PCMCIA_IOCTL
850 /* matching by cardmgr */
851 if (p_dev->cardmgr == p_drv)
852 return 1;
853#endif
854
855 while (did && did->match_flags) {
856 if (pcmcia_devmatch(p_dev, did))
857 return 1;
858 did++;
859 }
860
861 return 0;
862}
863
864#ifdef CONFIG_HOTPLUG
865
866static int pcmcia_bus_uevent(struct device *dev, char **envp, int num_envp,
867 char *buffer, int buffer_size)
868{
869 struct pcmcia_device *p_dev;
870 int i, length = 0;
871 u32 hash[4] = { 0, 0, 0, 0};
872
873 if (!dev)
874 return -ENODEV;
875
876 p_dev = to_pcmcia_dev(dev);
877
878 /* calculate hashes */
879 for (i=0; i<4; i++) {
880 if (!p_dev->prod_id[i])
881 continue;
882 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
883 }
884
885 i = 0;
886
887 if (add_uevent_var(envp, num_envp, &i,
888 buffer, buffer_size, &length,
889 "SOCKET_NO=%u",
890 p_dev->socket->sock))
891 return -ENOMEM;
892
893 if (add_uevent_var(envp, num_envp, &i,
894 buffer, buffer_size, &length,
895 "DEVICE_NO=%02X",
896 p_dev->device_no))
897 return -ENOMEM;
898
899 if (add_uevent_var(envp, num_envp, &i,
900 buffer, buffer_size, &length,
901 "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
902 "pa%08Xpb%08Xpc%08Xpd%08X",
903 p_dev->has_manf_id ? p_dev->manf_id : 0,
904 p_dev->has_card_id ? p_dev->card_id : 0,
905 p_dev->has_func_id ? p_dev->func_id : 0,
906 p_dev->func,
907 p_dev->device_no,
908 hash[0],
909 hash[1],
910 hash[2],
911 hash[3]))
912 return -ENOMEM;
913
914 envp[i] = NULL;
915
916 return 0;
917}
918
919#else
920
921static int pcmcia_bus_uevent(struct device *dev, char **envp, int num_envp,
922 char *buffer, int buffer_size)
923{
924 return -ENODEV;
925}
926
927#endif
928
929/************************ per-device sysfs output ***************************/
930
931#define pcmcia_device_attr(field, test, format) \
932static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf) \
933{ \
934 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
935 return p_dev->test ? sprintf (buf, format, p_dev->field) : -ENODEV; \
936}
937
938#define pcmcia_device_stringattr(name, field) \
939static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf) \
940{ \
941 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
942 return p_dev->field ? sprintf (buf, "%s\n", p_dev->field) : -ENODEV; \
943}
944
945pcmcia_device_attr(func, socket, "0x%02x\n");
946pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
947pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
948pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
949pcmcia_device_stringattr(prod_id1, prod_id[0]);
950pcmcia_device_stringattr(prod_id2, prod_id[1]);
951pcmcia_device_stringattr(prod_id3, prod_id[2]);
952pcmcia_device_stringattr(prod_id4, prod_id[3]);
953
954
955static ssize_t pcmcia_show_pm_state(struct device *dev, struct device_attribute *attr, char *buf)
956{
957 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
958
959 if (p_dev->suspended)
960 return sprintf(buf, "off\n");
961 else
962 return sprintf(buf, "on\n");
963}
964
965static ssize_t pcmcia_store_pm_state(struct device *dev, struct device_attribute *attr,
966 const char *buf, size_t count)
967{
968 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
969 int ret = 0;
970
971 if (!count)
972 return -EINVAL;
973
974 if ((!p_dev->suspended) && !strncmp(buf, "off", 3))
975 ret = dpm_runtime_suspend(dev, PMSG_SUSPEND);
976 else if (p_dev->suspended && !strncmp(buf, "on", 2))
977 dpm_runtime_resume(dev);
978
979 return ret ? ret : count;
980}
981
982
983static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
984{
985 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
986 int i;
987 u32 hash[4] = { 0, 0, 0, 0};
988
989 /* calculate hashes */
990 for (i=0; i<4; i++) {
991 if (!p_dev->prod_id[i])
992 continue;
993 hash[i] = crc32(0,p_dev->prod_id[i],strlen(p_dev->prod_id[i]));
994 }
995 return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
996 "pa%08Xpb%08Xpc%08Xpd%08X\n",
997 p_dev->has_manf_id ? p_dev->manf_id : 0,
998 p_dev->has_card_id ? p_dev->card_id : 0,
999 p_dev->has_func_id ? p_dev->func_id : 0,
1000 p_dev->func, p_dev->device_no,
1001 hash[0], hash[1], hash[2], hash[3]);
1002}
1003
1004static ssize_t pcmcia_store_allow_func_id_match(struct device *dev,
1005 struct device_attribute *attr, const char *buf, size_t count)
1006{
1007 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1008 int ret;
1009
1010 if (!count)
1011 return -EINVAL;
1012
1013 mutex_lock(&p_dev->socket->skt_mutex);
1014 p_dev->allow_func_id_match = 1;
1015 mutex_unlock(&p_dev->socket->skt_mutex);
1016
1017 ret = bus_rescan_devices(&pcmcia_bus_type);
1018 if (ret)
1019 printk(KERN_INFO "pcmcia: bus_rescan_devices failed after "
1020 "allowing func_id matches\n");
1021
1022 return count;
1023}
1024
1025static struct device_attribute pcmcia_dev_attrs[] = {
1026 __ATTR(function, 0444, func_show, NULL),
1027 __ATTR(pm_state, 0644, pcmcia_show_pm_state, pcmcia_store_pm_state),
1028 __ATTR_RO(func_id),
1029 __ATTR_RO(manf_id),
1030 __ATTR_RO(card_id),
1031 __ATTR_RO(prod_id1),
1032 __ATTR_RO(prod_id2),
1033 __ATTR_RO(prod_id3),
1034 __ATTR_RO(prod_id4),
1035 __ATTR_RO(modalias),
1036 __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match),
1037 __ATTR_NULL,
1038};
1039
1040/* PM support, also needed for reset */
1041
1042static int pcmcia_dev_suspend(struct device * dev, pm_message_t state)
1043{
1044 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1045 struct pcmcia_driver *p_drv = NULL;
1046 int ret = 0;
1047
1048 if (dev->driver)
1049 p_drv = to_pcmcia_drv(dev->driver);
1050
1051 if (!p_drv)
1052 goto out;
1053
1054 if (p_drv->suspend) {
1055 ret = p_drv->suspend(p_dev);
1056 if (ret)
1057 goto out;
1058 }
1059
1060 if (p_dev->device_no == p_dev->func)
1061 pcmcia_release_configuration(p_dev);
1062
1063 out:
1064 if (!ret)
1065 p_dev->suspended = 1;
1066 return ret;
1067}
1068
1069
1070static int pcmcia_dev_resume(struct device * dev)
1071{
1072 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1073 struct pcmcia_driver *p_drv = NULL;
1074 int ret = 0;
1075
1076 if (dev->driver)
1077 p_drv = to_pcmcia_drv(dev->driver);
1078
1079 if (!p_drv)
1080 goto out;
1081
1082 if (p_dev->device_no == p_dev->func) {
1083 ret = pcmcia_request_configuration(p_dev, &p_dev->conf);
1084 if (ret)
1085 goto out;
1086 }
1087
1088 if (p_drv->resume)
1089 ret = p_drv->resume(p_dev);
1090
1091 out:
1092 if (!ret)
1093 p_dev->suspended = 0;
1094 return ret;
1095}
1096
1097
1098static int pcmcia_bus_suspend_callback(struct device *dev, void * _data)
1099{
1100 struct pcmcia_socket *skt = _data;
1101 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1102
1103 if (p_dev->socket != skt)
1104 return 0;
1105
1106 return dpm_runtime_suspend(dev, PMSG_SUSPEND);
1107}
1108
1109static int pcmcia_bus_resume_callback(struct device *dev, void * _data)
1110{
1111 struct pcmcia_socket *skt = _data;
1112 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1113
1114 if (p_dev->socket != skt)
1115 return 0;
1116
1117 dpm_runtime_resume(dev);
1118
1119 return 0;
1120}
1121
1122static int pcmcia_bus_resume(struct pcmcia_socket *skt)
1123{
1124 bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback);
1125 return 0;
1126}
1127
1128static int pcmcia_bus_suspend(struct pcmcia_socket *skt)
1129{
1130 if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt,
1131 pcmcia_bus_suspend_callback)) {
1132 pcmcia_bus_resume(skt);
1133 return -EIO;
1134 }
1135 return 0;
1136}
1137
1138
1139/*======================================================================
1140
1141 The card status event handler.
1142
1143======================================================================*/
1144
1145/* Normally, the event is passed to individual drivers after
1146 * informing userspace. Only for CS_EVENT_CARD_REMOVAL this
1147 * is inversed to maintain historic compatibility.
1148 */
1149
1150static int ds_event(struct pcmcia_socket *skt, event_t event, int priority)
1151{
1152 struct pcmcia_socket *s = pcmcia_get_socket(skt);
1153
1154 if (!s) {
1155 printk(KERN_ERR "PCMCIA obtaining reference to socket %p " \
1156 "failed, event 0x%x lost!\n", skt, event);
1157 return -ENODEV;
1158 }
1159
1160 ds_dbg(1, "ds_event(0x%06x, %d, 0x%p)\n",
1161 event, priority, skt);
1162
1163 switch (event) {
1164 case CS_EVENT_CARD_REMOVAL:
1165 s->pcmcia_state.present = 0;
1166 pcmcia_card_remove(skt, NULL);
1167 handle_event(skt, event);
1168 break;
1169
1170 case CS_EVENT_CARD_INSERTION:
1171 s->pcmcia_state.present = 1;
1172 pcmcia_card_add(skt);
1173 handle_event(skt, event);
1174 break;
1175
1176 case CS_EVENT_EJECTION_REQUEST:
1177 break;
1178
1179 case CS_EVENT_PM_SUSPEND:
1180 case CS_EVENT_PM_RESUME:
1181 case CS_EVENT_RESET_PHYSICAL:
1182 case CS_EVENT_CARD_RESET:
1183 default:
1184 handle_event(skt, event);
1185 break;
1186 }
1187
1188 pcmcia_put_socket(s);
1189
1190 return 0;
1191} /* ds_event */
1192
1193
1194struct pcmcia_device * pcmcia_dev_present(struct pcmcia_device *_p_dev)
1195{
1196 struct pcmcia_device *p_dev;
1197 struct pcmcia_device *ret = NULL;
1198
1199 p_dev = pcmcia_get_dev(_p_dev);
1200 if (!p_dev)
1201 return NULL;
1202
1203 if (!p_dev->socket->pcmcia_state.present)
1204 goto out;
1205
1206 if (p_dev->_removed)
1207 goto out;
1208
1209 if (p_dev->suspended)
1210 goto out;
1211
1212 ret = p_dev;
1213 out:
1214 pcmcia_put_dev(p_dev);
1215 return ret;
1216}
1217EXPORT_SYMBOL(pcmcia_dev_present);
1218
1219
1220static struct pcmcia_callback pcmcia_bus_callback = {
1221 .owner = THIS_MODULE,
1222 .event = ds_event,
1223 .requery = pcmcia_bus_rescan,
1224 .suspend = pcmcia_bus_suspend,
1225 .resume = pcmcia_bus_resume,
1226};
1227
1228static int __devinit pcmcia_bus_add_socket(struct class_device *class_dev,
1229 struct class_interface *class_intf)
1230{
1231 struct pcmcia_socket *socket = class_get_devdata(class_dev);
1232 int ret;
1233
1234 socket = pcmcia_get_socket(socket);
1235 if (!socket) {
1236 printk(KERN_ERR "PCMCIA obtaining reference to socket %p failed\n", socket);
1237 return -ENODEV;
1238 }
1239
1240 /*
1241 * Ugly. But we want to wait for the socket threads to have started up.
1242 * We really should let the drivers themselves drive some of this..
1243 */
1244 msleep(250);
1245
1246#ifdef CONFIG_PCMCIA_IOCTL
1247 init_waitqueue_head(&socket->queue);
1248#endif
1249 INIT_LIST_HEAD(&socket->devices_list);
1250 INIT_WORK(&socket->device_add, pcmcia_delayed_add_pseudo_device);
1251 memset(&socket->pcmcia_state, 0, sizeof(u8));
1252 socket->device_count = 0;
1253
1254 ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback);
1255 if (ret) {
1256 printk(KERN_ERR "PCMCIA registration PCCard core failed for socket %p\n", socket);
1257 pcmcia_put_socket(socket);
1258 return (ret);
1259 }
1260
1261 return 0;
1262}
1263
1264static void pcmcia_bus_remove_socket(struct class_device *class_dev,
1265 struct class_interface *class_intf)
1266{
1267 struct pcmcia_socket *socket = class_get_devdata(class_dev);
1268
1269 if (!socket)
1270 return;
1271
1272 socket->pcmcia_state.dead = 1;
1273 pccard_register_pcmcia(socket, NULL);
1274
1275 /* unregister any unbound devices */
1276 pcmcia_card_remove(socket, NULL);
1277
1278 pcmcia_put_socket(socket);
1279
1280 return;
1281}
1282
1283
1284/* the pcmcia_bus_interface is used to handle pcmcia socket devices */
1285static struct class_interface pcmcia_bus_interface = {
1286 .class = &pcmcia_socket_class,
1287 .add = &pcmcia_bus_add_socket,
1288 .remove = &pcmcia_bus_remove_socket,
1289};
1290
1291
1292struct bus_type pcmcia_bus_type = {
1293 .name = "pcmcia",
1294 .uevent = pcmcia_bus_uevent,
1295 .match = pcmcia_bus_match,
1296 .dev_attrs = pcmcia_dev_attrs,
1297 .probe = pcmcia_device_probe,
1298 .remove = pcmcia_device_remove,
1299 .suspend = pcmcia_dev_suspend,
1300 .resume = pcmcia_dev_resume,
1301};
1302
1303
1304static int __init init_pcmcia_bus(void)
1305{
1306 int ret;
1307
1308 spin_lock_init(&pcmcia_dev_list_lock);
1309
1310 ret = bus_register(&pcmcia_bus_type);
1311 if (ret < 0) {
1312 printk(KERN_WARNING "pcmcia: bus_register error: %d\n", ret);
1313 return ret;
1314 }
1315 ret = class_interface_register(&pcmcia_bus_interface);
1316 if (ret < 0) {
1317 printk(KERN_WARNING
1318 "pcmcia: class_interface_register error: %d\n", ret);
1319 bus_unregister(&pcmcia_bus_type);
1320 return ret;
1321 }
1322
1323 pcmcia_setup_ioctl();
1324
1325 return 0;
1326}
1327fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that
1328 * pcmcia_socket_class is already registered */
1329
1330
1331static void __exit exit_pcmcia_bus(void)
1332{
1333 pcmcia_cleanup_ioctl();
1334
1335 class_interface_unregister(&pcmcia_bus_interface);
1336
1337 bus_unregister(&pcmcia_bus_type);
1338}
1339module_exit(exit_pcmcia_bus);
1340
1341
1342MODULE_ALIAS("ds");
Linux kernel - Deliverables
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