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[PATCH] Optimize PDA accesses slightly
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / pcmcia / ds.c
blob74b3124e8247e444fd2911eecfe0de1ca5597063
1 /*
2 * ds.c -- 16-bit PCMCIA core support
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
7 *
8 * The initial developer of the original code is David A. Hinds
9 * <dahinds@users.sourceforge.net>. Portions created by David A. Hinds
10 * are Copyright (C) 1999 David A. Hinds. All Rights Reserved.
11 *
12 * (C) 1999 David A. Hinds
13 * (C) 2003 - 2006 Dominik Brodowski
14 */
15
16 #include <linux/kernel.h>
17 #include <linux/module.h>
18 #include <linux/init.h>
19 #include <linux/errno.h>
20 #include <linux/list.h>
21 #include <linux/delay.h>
22 #include <linux/workqueue.h>
23 #include <linux/crc32.h>
24 #include <linux/firmware.h>
25 #include <linux/kref.h>
26
27 #define IN_CARD_SERVICES
28 #include <pcmcia/cs_types.h>
29 #include <pcmcia/cs.h>
30 #include <pcmcia/cistpl.h>
31 #include <pcmcia/ds.h>
32 #include <pcmcia/ss.h>
33
34 #include "cs_internal.h"
35 #include "ds_internal.h"
36
37 /*====================================================================*/
38
39 /* Module parameters */
40
41 MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
42 MODULE_DESCRIPTION("PCMCIA Driver Services");
43 MODULE_LICENSE("GPL");
44
45 #ifdef DEBUG
46 int ds_pc_debug;
47
48 module_param_named(pc_debug, ds_pc_debug, int, 0644);
49
50 #define ds_dbg(lvl, fmt, arg...) do { \
51 if (ds_pc_debug > (lvl)) \
52 printk(KERN_DEBUG "ds: " fmt , ## arg); \
53 } while (0)
54 #else
55 #define ds_dbg(lvl, fmt, arg...) do { } while (0)
56 #endif
57
58 spinlock_t pcmcia_dev_list_lock;
59
60 /*====================================================================*/
61
62 /* code which was in cs.c before */
63
64 /* String tables for error messages */
65
66 typedef struct lookup_t {
67 int key;
68 char *msg;
69 } lookup_t;
70
71 static const lookup_t error_table[] = {
72 { CS_SUCCESS, "Operation succeeded" },
73 { CS_BAD_ADAPTER, "Bad adapter" },
74 { CS_BAD_ATTRIBUTE, "Bad attribute", },
75 { CS_BAD_BASE, "Bad base address" },
76 { CS_BAD_EDC, "Bad EDC" },
77 { CS_BAD_IRQ, "Bad IRQ" },
78 { CS_BAD_OFFSET, "Bad offset" },
79 { CS_BAD_PAGE, "Bad page number" },
80 { CS_READ_FAILURE, "Read failure" },
81 { CS_BAD_SIZE, "Bad size" },
82 { CS_BAD_SOCKET, "Bad socket" },
83 { CS_BAD_TYPE, "Bad type" },
84 { CS_BAD_VCC, "Bad Vcc" },
85 { CS_BAD_VPP, "Bad Vpp" },
86 { CS_BAD_WINDOW, "Bad window" },
87 { CS_WRITE_FAILURE, "Write failure" },
88 { CS_NO_CARD, "No card present" },
89 { CS_UNSUPPORTED_FUNCTION, "Usupported function" },
90 { CS_UNSUPPORTED_MODE, "Unsupported mode" },
91 { CS_BAD_SPEED, "Bad speed" },
92 { CS_BUSY, "Resource busy" },
93 { CS_GENERAL_FAILURE, "General failure" },
94 { CS_WRITE_PROTECTED, "Write protected" },
95 { CS_BAD_ARG_LENGTH, "Bad argument length" },
96 { CS_BAD_ARGS, "Bad arguments" },
97 { CS_CONFIGURATION_LOCKED, "Configuration locked" },
98 { CS_IN_USE, "Resource in use" },
99 { CS_NO_MORE_ITEMS, "No more items" },
100 { CS_OUT_OF_RESOURCE, "Out of resource" },
101 { CS_BAD_HANDLE, "Bad handle" },
102 { CS_BAD_TUPLE, "Bad CIS tuple" }
103 };
104
105
106 static const lookup_t service_table[] = {
107 { AccessConfigurationRegister, "AccessConfigurationRegister" },
108 { AddSocketServices, "AddSocketServices" },
109 { AdjustResourceInfo, "AdjustResourceInfo" },
110 { CheckEraseQueue, "CheckEraseQueue" },
111 { CloseMemory, "CloseMemory" },
112 { DeregisterClient, "DeregisterClient" },
113 { DeregisterEraseQueue, "DeregisterEraseQueue" },
114 { GetCardServicesInfo, "GetCardServicesInfo" },
115 { GetClientInfo, "GetClientInfo" },
116 { GetConfigurationInfo, "GetConfigurationInfo" },
117 { GetEventMask, "GetEventMask" },
118 { GetFirstClient, "GetFirstClient" },
119 { GetFirstRegion, "GetFirstRegion" },
120 { GetFirstTuple, "GetFirstTuple" },
121 { GetNextClient, "GetNextClient" },
122 { GetNextRegion, "GetNextRegion" },
123 { GetNextTuple, "GetNextTuple" },
124 { GetStatus, "GetStatus" },
125 { GetTupleData, "GetTupleData" },
126 { MapMemPage, "MapMemPage" },
127 { ModifyConfiguration, "ModifyConfiguration" },
128 { ModifyWindow, "ModifyWindow" },
129 { OpenMemory, "OpenMemory" },
130 { ParseTuple, "ParseTuple" },
131 { ReadMemory, "ReadMemory" },
132 { RegisterClient, "RegisterClient" },
133 { RegisterEraseQueue, "RegisterEraseQueue" },
134 { RegisterMTD, "RegisterMTD" },
135 { ReleaseConfiguration, "ReleaseConfiguration" },
136 { ReleaseIO, "ReleaseIO" },
137 { ReleaseIRQ, "ReleaseIRQ" },
138 { ReleaseWindow, "ReleaseWindow" },
139 { RequestConfiguration, "RequestConfiguration" },
140 { RequestIO, "RequestIO" },
141 { RequestIRQ, "RequestIRQ" },
142 { RequestSocketMask, "RequestSocketMask" },
143 { RequestWindow, "RequestWindow" },
144 { ResetCard, "ResetCard" },
145 { SetEventMask, "SetEventMask" },
146 { ValidateCIS, "ValidateCIS" },
147 { WriteMemory, "WriteMemory" },
148 { BindDevice, "BindDevice" },
149 { BindMTD, "BindMTD" },
150 { ReportError, "ReportError" },
151 { SuspendCard, "SuspendCard" },
152 { ResumeCard, "ResumeCard" },
153 { EjectCard, "EjectCard" },
154 { InsertCard, "InsertCard" },
155 { ReplaceCIS, "ReplaceCIS" }
156 };
157
158
159 static int pcmcia_report_error(struct pcmcia_device *p_dev, error_info_t *err)
160 {
161 int i;
162 char *serv;
163
164 if (!p_dev)
165 printk(KERN_NOTICE);
166 else
167 printk(KERN_NOTICE "%s: ", p_dev->dev.bus_id);
168
169 for (i = 0; i < ARRAY_SIZE(service_table); i++)
170 if (service_table[i].key == err->func)
171 break;
172 if (i < ARRAY_SIZE(service_table))
173 serv = service_table[i].msg;
174 else
175 serv = "Unknown service number";
176
177 for (i = 0; i < ARRAY_SIZE(error_table); i++)
178 if (error_table[i].key == err->retcode)
179 break;
180 if (i < ARRAY_SIZE(error_table))
181 printk("%s: %s\n", serv, error_table[i].msg);
182 else
183 printk("%s: Unknown error code %#x\n", serv, err->retcode);
184
185 return CS_SUCCESS;
186 } /* report_error */
187
188 /* end of code which was in cs.c before */
189
190 /*======================================================================*/
191
192 void cs_error(struct pcmcia_device *p_dev, int func, int ret)
193 {
194 error_info_t err = { func, ret };
195 pcmcia_report_error(p_dev, &err);
196 }
197 EXPORT_SYMBOL(cs_error);
198
199
200 static void pcmcia_check_driver(struct pcmcia_driver *p_drv)
201 {
202 struct pcmcia_device_id *did = p_drv->id_table;
203 unsigned int i;
204 u32 hash;
205
206 if (!p_drv->probe || !p_drv->remove)
207 printk(KERN_DEBUG "pcmcia: %s lacks a requisite callback "
208 "function\n", p_drv->drv.name);
209
210 while (did && did->match_flags) {
211 for (i=0; i<4; i++) {
212 if (!did->prod_id[i])
213 continue;
214
215 hash = crc32(0, did->prod_id[i], strlen(did->prod_id[i]));
216 if (hash == did->prod_id_hash[i])
217 continue;
218
219 printk(KERN_DEBUG "pcmcia: %s: invalid hash for "
220 "product string \"%s\": is 0x%x, should "
221 "be 0x%x\n", p_drv->drv.name, did->prod_id[i],
222 did->prod_id_hash[i], hash);
223 printk(KERN_DEBUG "pcmcia: see "
224 "Documentation/pcmcia/devicetable.txt for "
225 "details\n");
226 }
227 did++;
228 }
229
230 return;
231 }
232
233
234 #ifdef CONFIG_PCMCIA_LOAD_CIS
235
236 /**
237 * pcmcia_load_firmware - load CIS from userspace if device-provided is broken
238 * @dev - the pcmcia device which needs a CIS override
239 * @filename - requested filename in /lib/firmware/
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 */
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 int 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 }
314 EXPORT_SYMBOL(pcmcia_register_driver);
315
316 /**
317 * pcmcia_unregister_driver - unregister a PCMCIA driver with the bus core
318 */
319 void pcmcia_unregister_driver(struct pcmcia_driver *driver)
320 {
321 driver_unregister(&driver->drv);
322 }
323 EXPORT_SYMBOL(pcmcia_unregister_driver);
324
325
326 /* pcmcia_device handling */
327
328 struct 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
337 void pcmcia_put_dev(struct pcmcia_device *p_dev)
338 {
339 if (p_dev)
340 put_device(&p_dev->dev);
341 }
342
343 static 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
349 static 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
359 static 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
368 static 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 */
418 static 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
448 static 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 */
498 static 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 */
576 static DEFINE_MUTEX(device_add_lock);
577
578 struct 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
670 static 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
701 static void pcmcia_delayed_add_pseudo_device(void *data)
702 {
703 struct pcmcia_socket *s = data;
704 pcmcia_device_add(s, 0);
705 s->pcmcia_state.device_add_pending = 0;
706 }
707
708 static int pcmcia_requery(struct device *dev, void * _data)
709 {
710 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
711 if (!p_dev->dev.driver)
712 pcmcia_device_query(p_dev);
713
714 return 0;
715 }
716
717 static void pcmcia_bus_rescan(struct pcmcia_socket *skt)
718 {
719 int no_devices=0;
720 unsigned long flags;
721
722 /* must be called with skt_mutex held */
723 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
724 if (list_empty(&skt->devices_list))
725 no_devices=1;
726 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
727
728 /* if no devices were added for this socket yet because of
729 * missing resource information or other trouble, we need to
730 * do this now. */
731 if (no_devices) {
732 int ret = pcmcia_card_add(skt);
733 if (ret)
734 return;
735 }
736
737 /* some device information might have changed because of a CIS
738 * update or because we can finally read it correctly... so
739 * determine it again, overwriting old values if necessary. */
740 bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery);
741
742 /* we re-scan all devices, not just the ones connected to this
743 * socket. This does not matter, though. */
744 bus_rescan_devices(&pcmcia_bus_type);
745 }
746
747 static inline int pcmcia_devmatch(struct pcmcia_device *dev,
748 struct pcmcia_device_id *did)
749 {
750 if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
751 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
752 return 0;
753 }
754
755 if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
756 if ((!dev->has_card_id) || (dev->card_id != did->card_id))
757 return 0;
758 }
759
760 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
761 if (dev->func != did->function)
762 return 0;
763 }
764
765 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
766 if (!dev->prod_id[0])
767 return 0;
768 if (strcmp(did->prod_id[0], dev->prod_id[0]))
769 return 0;
770 }
771
772 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
773 if (!dev->prod_id[1])
774 return 0;
775 if (strcmp(did->prod_id[1], dev->prod_id[1]))
776 return 0;
777 }
778
779 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
780 if (!dev->prod_id[2])
781 return 0;
782 if (strcmp(did->prod_id[2], dev->prod_id[2]))
783 return 0;
784 }
785
786 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
787 if (!dev->prod_id[3])
788 return 0;
789 if (strcmp(did->prod_id[3], dev->prod_id[3]))
790 return 0;
791 }
792
793 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
794 if (dev->device_no != did->device_no)
795 return 0;
796 }
797
798 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
799 if ((!dev->has_func_id) || (dev->func_id != did->func_id))
800 return 0;
801
802 /* if this is a pseudo-multi-function device,
803 * we need explicit matches */
804 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO)
805 return 0;
806 if (dev->device_no)
807 return 0;
808
809 /* also, FUNC_ID matching needs to be activated by userspace
810 * after it has re-checked that there is no possible module
811 * with a prod_id/manf_id/card_id match.
812 */
813 if (!dev->allow_func_id_match)
814 return 0;
815 }
816
817 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
818 if (!dev->socket->fake_cis)
819 pcmcia_load_firmware(dev, did->cisfile);
820
821 if (!dev->socket->fake_cis)
822 return 0;
823 }
824
825 if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
826 int i;
827 for (i=0; i<4; i++)
828 if (dev->prod_id[i])
829 return 0;
830 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
831 return 0;
832 }
833
834 dev->dev.driver_data = (void *) did;
835
836 return 1;
837 }
838
839
840 static int pcmcia_bus_match(struct device * dev, struct device_driver * drv) {
841 struct pcmcia_device * p_dev = to_pcmcia_dev(dev);
842 struct pcmcia_driver * p_drv = to_pcmcia_drv(drv);
843 struct pcmcia_device_id *did = p_drv->id_table;
844
845 #ifdef CONFIG_PCMCIA_IOCTL
846 /* matching by cardmgr */
847 if (p_dev->cardmgr == p_drv)
848 return 1;
849 #endif
850
851 while (did && did->match_flags) {
852 if (pcmcia_devmatch(p_dev, did))
853 return 1;
854 did++;
855 }
856
857 return 0;
858 }
859
860 #ifdef CONFIG_HOTPLUG
861
862 static int pcmcia_bus_uevent(struct device *dev, char **envp, int num_envp,
863 char *buffer, int buffer_size)
864 {
865 struct pcmcia_device *p_dev;
866 int i, length = 0;
867 u32 hash[4] = { 0, 0, 0, 0};
868
869 if (!dev)
870 return -ENODEV;
871
872 p_dev = to_pcmcia_dev(dev);
873
874 /* calculate hashes */
875 for (i=0; i<4; i++) {
876 if (!p_dev->prod_id[i])
877 continue;
878 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
879 }
880
881 i = 0;
882
883 if (add_uevent_var(envp, num_envp, &i,
884 buffer, buffer_size, &length,
885 "SOCKET_NO=%u",
886 p_dev->socket->sock))
887 return -ENOMEM;
888
889 if (add_uevent_var(envp, num_envp, &i,
890 buffer, buffer_size, &length,
891 "DEVICE_NO=%02X",
892 p_dev->device_no))
893 return -ENOMEM;
894
895 if (add_uevent_var(envp, num_envp, &i,
896 buffer, buffer_size, &length,
897 "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
898 "pa%08Xpb%08Xpc%08Xpd%08X",
899 p_dev->has_manf_id ? p_dev->manf_id : 0,
900 p_dev->has_card_id ? p_dev->card_id : 0,
901 p_dev->has_func_id ? p_dev->func_id : 0,
902 p_dev->func,
903 p_dev->device_no,
904 hash[0],
905 hash[1],
906 hash[2],
907 hash[3]))
908 return -ENOMEM;
909
910 envp[i] = NULL;
911
912 return 0;
913 }
914
915 #else
916
917 static int pcmcia_bus_uevent(struct device *dev, char **envp, int num_envp,
918 char *buffer, int buffer_size)
919 {
920 return -ENODEV;
921 }
922
923 #endif
924
925 /************************ per-device sysfs output ***************************/
926
927 #define pcmcia_device_attr(field, test, format) \
928 static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf) \
929 { \
930 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
931 return p_dev->test ? sprintf (buf, format, p_dev->field) : -ENODEV; \
932 }
933
934 #define pcmcia_device_stringattr(name, field) \
935 static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf) \
936 { \
937 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
938 return p_dev->field ? sprintf (buf, "%s\n", p_dev->field) : -ENODEV; \
939 }
940
941 pcmcia_device_attr(func, socket, "0x%02x\n");
942 pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
943 pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
944 pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
945 pcmcia_device_stringattr(prod_id1, prod_id[0]);
946 pcmcia_device_stringattr(prod_id2, prod_id[1]);
947 pcmcia_device_stringattr(prod_id3, prod_id[2]);
948 pcmcia_device_stringattr(prod_id4, prod_id[3]);
949
950
951 static ssize_t pcmcia_show_pm_state(struct device *dev, struct device_attribute *attr, char *buf)
952 {
953 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
954
955 if (p_dev->suspended)
956 return sprintf(buf, "off\n");
957 else
958 return sprintf(buf, "on\n");
959 }
960
961 static ssize_t pcmcia_store_pm_state(struct device *dev, struct device_attribute *attr,
962 const char *buf, size_t count)
963 {
964 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
965 int ret = 0;
966
967 if (!count)
968 return -EINVAL;
969
970 if ((!p_dev->suspended) && !strncmp(buf, "off", 3))
971 ret = dpm_runtime_suspend(dev, PMSG_SUSPEND);
972 else if (p_dev->suspended && !strncmp(buf, "on", 2))
973 dpm_runtime_resume(dev);
974
975 return ret ? ret : count;
976 }
977
978
979 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
980 {
981 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
982 int i;
983 u32 hash[4] = { 0, 0, 0, 0};
984
985 /* calculate hashes */
986 for (i=0; i<4; i++) {
987 if (!p_dev->prod_id[i])
988 continue;
989 hash[i] = crc32(0,p_dev->prod_id[i],strlen(p_dev->prod_id[i]));
990 }
991 return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
992 "pa%08Xpb%08Xpc%08Xpd%08X\n",
993 p_dev->has_manf_id ? p_dev->manf_id : 0,
994 p_dev->has_card_id ? p_dev->card_id : 0,
995 p_dev->has_func_id ? p_dev->func_id : 0,
996 p_dev->func, p_dev->device_no,
997 hash[0], hash[1], hash[2], hash[3]);
998 }
999
1000 static ssize_t pcmcia_store_allow_func_id_match(struct device *dev,
1001 struct device_attribute *attr, const char *buf, size_t count)
1002 {
1003 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1004
1005 if (!count)
1006 return -EINVAL;
1007
1008 mutex_lock(&p_dev->socket->skt_mutex);
1009 p_dev->allow_func_id_match = 1;
1010 mutex_unlock(&p_dev->socket->skt_mutex);
1011
1012 bus_rescan_devices(&pcmcia_bus_type);
1013
1014 return count;
1015 }
1016
1017 static struct device_attribute pcmcia_dev_attrs[] = {
1018 __ATTR(function, 0444, func_show, NULL),
1019 __ATTR(pm_state, 0644, pcmcia_show_pm_state, pcmcia_store_pm_state),
1020 __ATTR_RO(func_id),
1021 __ATTR_RO(manf_id),
1022 __ATTR_RO(card_id),
1023 __ATTR_RO(prod_id1),
1024 __ATTR_RO(prod_id2),
1025 __ATTR_RO(prod_id3),
1026 __ATTR_RO(prod_id4),
1027 __ATTR_RO(modalias),
1028 __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match),
1029 __ATTR_NULL,
1030 };
1031
1032 /* PM support, also needed for reset */
1033
1034 static int pcmcia_dev_suspend(struct device * dev, pm_message_t state)
1035 {
1036 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1037 struct pcmcia_driver *p_drv = NULL;
1038 int ret = 0;
1039
1040 if (dev->driver)
1041 p_drv = to_pcmcia_drv(dev->driver);
1042
1043 if (!p_drv)
1044 goto out;
1045
1046 if (p_drv->suspend) {
1047 ret = p_drv->suspend(p_dev);
1048 if (ret)
1049 goto out;
1050 }
1051
1052 if (p_dev->device_no == p_dev->func)
1053 pcmcia_release_configuration(p_dev);
1054
1055 out:
1056 if (!ret)
1057 p_dev->suspended = 1;
1058 return ret;
1059 }
1060
1061
1062 static int pcmcia_dev_resume(struct device * dev)
1063 {
1064 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1065 struct pcmcia_driver *p_drv = NULL;
1066 int ret = 0;
1067
1068 if (dev->driver)
1069 p_drv = to_pcmcia_drv(dev->driver);
1070
1071 if (!p_drv)
1072 goto out;
1073
1074 if (p_dev->device_no == p_dev->func) {
1075 ret = pcmcia_request_configuration(p_dev, &p_dev->conf);
1076 if (ret)
1077 goto out;
1078 }
1079
1080 if (p_drv->resume)
1081 ret = p_drv->resume(p_dev);
1082
1083 out:
1084 if (!ret)
1085 p_dev->suspended = 0;
1086 return ret;
1087 }
1088
1089
1090 static int pcmcia_bus_suspend_callback(struct device *dev, void * _data)
1091 {
1092 struct pcmcia_socket *skt = _data;
1093 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1094
1095 if (p_dev->socket != skt)
1096 return 0;
1097
1098 return dpm_runtime_suspend(dev, PMSG_SUSPEND);
1099 }
1100
1101 static int pcmcia_bus_resume_callback(struct device *dev, void * _data)
1102 {
1103 struct pcmcia_socket *skt = _data;
1104 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1105
1106 if (p_dev->socket != skt)
1107 return 0;
1108
1109 dpm_runtime_resume(dev);
1110
1111 return 0;
1112 }
1113
1114 static int pcmcia_bus_resume(struct pcmcia_socket *skt)
1115 {
1116 bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback);
1117 return 0;
1118 }
1119
1120 static int pcmcia_bus_suspend(struct pcmcia_socket *skt)
1121 {
1122 if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt,
1123 pcmcia_bus_suspend_callback)) {
1124 pcmcia_bus_resume(skt);
1125 return -EIO;
1126 }
1127 return 0;
1128 }
1129
1130
1131 /*======================================================================
1132
1133 The card status event handler.
1134
1135 ======================================================================*/
1136
1137 /* Normally, the event is passed to individual drivers after
1138 * informing userspace. Only for CS_EVENT_CARD_REMOVAL this
1139 * is inversed to maintain historic compatibility.
1140 */
1141
1142 static int ds_event(struct pcmcia_socket *skt, event_t event, int priority)
1143 {
1144 struct pcmcia_socket *s = pcmcia_get_socket(skt);
1145
1146 if (!s) {
1147 printk(KERN_ERR "PCMCIA obtaining reference to socket %p " \
1148 "failed, event 0x%x lost!\n", skt, event);
1149 return -ENODEV;
1150 }
1151
1152 ds_dbg(1, "ds_event(0x%06x, %d, 0x%p)\n",
1153 event, priority, skt);
1154
1155 switch (event) {
1156 case CS_EVENT_CARD_REMOVAL:
1157 s->pcmcia_state.present = 0;
1158 pcmcia_card_remove(skt, NULL);
1159 handle_event(skt, event);
1160 break;
1161
1162 case CS_EVENT_CARD_INSERTION:
1163 s->pcmcia_state.present = 1;
1164 pcmcia_card_add(skt);
1165 handle_event(skt, event);
1166 break;
1167
1168 case CS_EVENT_EJECTION_REQUEST:
1169 break;
1170
1171 case CS_EVENT_PM_SUSPEND:
1172 case CS_EVENT_PM_RESUME:
1173 case CS_EVENT_RESET_PHYSICAL:
1174 case CS_EVENT_CARD_RESET:
1175 default:
1176 handle_event(skt, event);
1177 break;
1178 }
1179
1180 pcmcia_put_socket(s);
1181
1182 return 0;
1183 } /* ds_event */
1184
1185
1186 struct pcmcia_device * pcmcia_dev_present(struct pcmcia_device *_p_dev)
1187 {
1188 struct pcmcia_device *p_dev;
1189 struct pcmcia_device *ret = NULL;
1190
1191 p_dev = pcmcia_get_dev(_p_dev);
1192 if (!p_dev)
1193 return NULL;
1194
1195 if (!p_dev->socket->pcmcia_state.present)
1196 goto out;
1197
1198 if (p_dev->_removed)
1199 goto out;
1200
1201 if (p_dev->suspended)
1202 goto out;
1203
1204 ret = p_dev;
1205 out:
1206 pcmcia_put_dev(p_dev);
1207 return ret;
1208 }
1209 EXPORT_SYMBOL(pcmcia_dev_present);
1210
1211
1212 static struct pcmcia_callback pcmcia_bus_callback = {
1213 .owner = THIS_MODULE,
1214 .event = ds_event,
1215 .requery = pcmcia_bus_rescan,
1216 .suspend = pcmcia_bus_suspend,
1217 .resume = pcmcia_bus_resume,
1218 };
1219
1220 static int __devinit pcmcia_bus_add_socket(struct class_device *class_dev,
1221 struct class_interface *class_intf)
1222 {
1223 struct pcmcia_socket *socket = class_get_devdata(class_dev);
1224 int ret;
1225
1226 socket = pcmcia_get_socket(socket);
1227 if (!socket) {
1228 printk(KERN_ERR "PCMCIA obtaining reference to socket %p failed\n", socket);
1229 return -ENODEV;
1230 }
1231
1232 /*
1233 * Ugly. But we want to wait for the socket threads to have started up.
1234 * We really should let the drivers themselves drive some of this..
1235 */
1236 msleep(250);
1237
1238 #ifdef CONFIG_PCMCIA_IOCTL
1239 init_waitqueue_head(&socket->queue);
1240 #endif
1241 INIT_LIST_HEAD(&socket->devices_list);
1242 INIT_WORK(&socket->device_add, pcmcia_delayed_add_pseudo_device, socket);
1243 memset(&socket->pcmcia_state, 0, sizeof(u8));
1244 socket->device_count = 0;
1245
1246 ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback);
1247 if (ret) {
1248 printk(KERN_ERR "PCMCIA registration PCCard core failed for socket %p\n", socket);
1249 pcmcia_put_socket(socket);
1250 return (ret);
1251 }
1252
1253 return 0;
1254 }
1255
1256 static void pcmcia_bus_remove_socket(struct class_device *class_dev,
1257 struct class_interface *class_intf)
1258 {
1259 struct pcmcia_socket *socket = class_get_devdata(class_dev);
1260
1261 if (!socket)
1262 return;
1263
1264 socket->pcmcia_state.dead = 1;
1265 pccard_register_pcmcia(socket, NULL);
1266
1267 pcmcia_put_socket(socket);
1268
1269 return;
1270 }
1271
1272
1273 /* the pcmcia_bus_interface is used to handle pcmcia socket devices */
1274 static struct class_interface pcmcia_bus_interface = {
1275 .class = &pcmcia_socket_class,
1276 .add = &pcmcia_bus_add_socket,
1277 .remove = &pcmcia_bus_remove_socket,
1278 };
1279
1280
1281 struct bus_type pcmcia_bus_type = {
1282 .name = "pcmcia",
1283 .uevent = pcmcia_bus_uevent,
1284 .match = pcmcia_bus_match,
1285 .dev_attrs = pcmcia_dev_attrs,
1286 .probe = pcmcia_device_probe,
1287 .remove = pcmcia_device_remove,
1288 .suspend = pcmcia_dev_suspend,
1289 .resume = pcmcia_dev_resume,
1290 };
1291
1292
1293 static int __init init_pcmcia_bus(void)
1294 {
1295 spin_lock_init(&pcmcia_dev_list_lock);
1296
1297 bus_register(&pcmcia_bus_type);
1298 class_interface_register(&pcmcia_bus_interface);
1299
1300 pcmcia_setup_ioctl();
1301
1302 return 0;
1303 }
1304 fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that
1305 * pcmcia_socket_class is already registered */
1306
1307
1308 static void __exit exit_pcmcia_bus(void)
1309 {
1310 pcmcia_cleanup_ioctl();
1311
1312 class_interface_unregister(&pcmcia_bus_interface);
1313
1314 bus_unregister(&pcmcia_bus_type);
1315 }
1316 module_exit(exit_pcmcia_bus);
1317
1318
1319 MODULE_ALIAS("ds");
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree