drivers/pcmcia/ds.c

   1 /*
   2  * ds.c -- 16-bit PCMCIA core support
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2 as
   6  * published by the Free Software Foundation.
   7  *
   8  * The initial developer of the original code is David A. Hinds
   9  * <dahinds@users.sourceforge.net>.  Portions created by David A. Hinds
  10  * are Copyright (C) 1999 David A. Hinds.  All Rights Reserved.
  11  *
  12  * (C) 1999             David A. Hinds
  13  * (C) 2003 - 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 #include <linux/dma-mapping.h>
  27
  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
  36 /*====================================================================*/
  37
  38 /* Module parameters */
  39
  40 MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
  41 MODULE_DESCRIPTION("PCMCIA Driver Services");
  42 MODULE_LICENSE("GPL");
  43
  44
  45 /*====================================================================*/
  46
  47 static void pcmcia_check_driver(struct pcmcia_driver *p_drv)
  48 {
  49         struct pcmcia_device_id *did = p_drv->id_table;
  50         unsigned int i;
  51         u32 hash;
  52
  53         if (!p_drv->probe || !p_drv->remove)
  54                 printk(KERN_DEBUG "pcmcia: %s lacks a requisite callback "
  55                        "function\n", p_drv->drv.name);
  56
  57         while (did && did->match_flags) {
  58                 for (i = 0; i < 4; i++) {
  59                         if (!did->prod_id[i])
  60                                 continue;
  61
  62                         hash = crc32(0, did->prod_id[i], strlen(did->prod_id[i]));
  63                         if (hash == did->prod_id_hash[i])
  64                                 continue;
  65
  66                         printk(KERN_DEBUG "pcmcia: %s: invalid hash for "
  67                                "product string \"%s\": is 0x%x, should "
  68                                "be 0x%x\n", p_drv->drv.name, did->prod_id[i],
  69                                did->prod_id_hash[i], hash);
  70                         printk(KERN_DEBUG "pcmcia: see "
  71                                 "Documentation/pcmcia/devicetable.txt for "
  72                                 "details\n");
  73                 }
  74                 did++;
  75         }
  76
  77         return;
  78 }
  79
  80
  81 /*======================================================================*/
  82
  83
  84 struct pcmcia_dynid {
  85         struct list_head                node;
  86         struct pcmcia_device_id         id;
  87 };
  88
  89 /**
  90  * pcmcia_store_new_id - add a new PCMCIA device ID to this driver and re-probe devices
  91  * @driver: target device driver
  92  * @buf: buffer for scanning device ID data
  93  * @count: input size
  94  *
  95  * Adds a new dynamic PCMCIA device ID to this driver,
  96  * and causes the driver to probe for all devices again.
  97  */
  98 static ssize_t
  99 pcmcia_store_new_id(struct device_driver *driver, const char *buf, size_t count)
 100 {
 101         struct pcmcia_dynid *dynid;
 102         struct pcmcia_driver *pdrv = to_pcmcia_drv(driver);
 103         __u16 match_flags, manf_id, card_id;
 104         __u8 func_id, function, device_no;
 105         __u32 prod_id_hash[4] = {0, 0, 0, 0};
 106         int fields = 0;
 107         int retval = 0;
 108
 109         fields = sscanf(buf, "%hx %hx %hx %hhx %hhx %hhx %x %x %x %x",
 110                         &match_flags, &manf_id, &card_id, &func_id, &function, &device_no,
 111                         &prod_id_hash[0], &prod_id_hash[1], &prod_id_hash[2], &prod_id_hash[3]);
 112         if (fields < 6)
 113                 return -EINVAL;
 114
 115         dynid = kzalloc(sizeof(struct pcmcia_dynid), GFP_KERNEL);
 116         if (!dynid)
 117                 return -ENOMEM;
 118
 119         dynid->id.match_flags = match_flags;
 120         dynid->id.manf_id = manf_id;
 121         dynid->id.card_id = card_id;
 122         dynid->id.func_id = func_id;
 123         dynid->id.function = function;
 124         dynid->id.device_no = device_no;
 125         memcpy(dynid->id.prod_id_hash, prod_id_hash, sizeof(__u32) * 4);
 126
 127         mutex_lock(&pdrv->dynids.lock);
 128         list_add_tail(&dynid->node, &pdrv->dynids.list);
 129         mutex_unlock(&pdrv->dynids.lock);
 130
 131         if (get_driver(&pdrv->drv)) {
 132                 retval = driver_attach(&pdrv->drv);
 133                 put_driver(&pdrv->drv);
 134         }
 135
 136         if (retval)
 137                 return retval;
 138         return count;
 139 }
 140 static DRIVER_ATTR(new_id, S_IWUSR, NULL, pcmcia_store_new_id);
 141
 142 static void
 143 pcmcia_free_dynids(struct pcmcia_driver *drv)
 144 {
 145         struct pcmcia_dynid *dynid, *n;
 146
 147         mutex_lock(&drv->dynids.lock);
 148         list_for_each_entry_safe(dynid, n, &drv->dynids.list, node) {
 149                 list_del(&dynid->node);
 150                 kfree(dynid);
 151         }
 152         mutex_unlock(&drv->dynids.lock);
 153 }
 154
 155 static int
 156 pcmcia_create_newid_file(struct pcmcia_driver *drv)
 157 {
 158         int error = 0;
 159         if (drv->probe != NULL)
 160                 error = driver_create_file(&drv->drv, &driver_attr_new_id);
 161         return error;
 162 }
 163
 164
 165 /**
 166  * pcmcia_register_driver - register a PCMCIA driver with the bus core
 167  * @driver: the &driver being registered
 168  *
 169  * Registers a PCMCIA driver with the PCMCIA bus core.
 170  */
 171 int pcmcia_register_driver(struct pcmcia_driver *driver)
 172 {
 173         int error;
 174
 175         if (!driver)
 176                 return -EINVAL;
 177
 178         pcmcia_check_driver(driver);
 179
 180         /* initialize common fields */
 181         driver->drv.bus = &pcmcia_bus_type;
 182         driver->drv.owner = driver->owner;
 183         mutex_init(&driver->dynids.lock);
 184         INIT_LIST_HEAD(&driver->dynids.list);
 185
 186         pr_debug("registering driver %s\n", driver->drv.name);
 187
 188         error = driver_register(&driver->drv);
 189         if (error < 0)
 190                 return error;
 191
 192         error = pcmcia_create_newid_file(driver);
 193         if (error)
 194                 driver_unregister(&driver->drv);
 195
 196         return error;
 197 }
 198 EXPORT_SYMBOL(pcmcia_register_driver);
 199
 200 /**
 201  * pcmcia_unregister_driver - unregister a PCMCIA driver with the bus core
 202  * @driver: the &driver being unregistered
 203  */
 204 void pcmcia_unregister_driver(struct pcmcia_driver *driver)
 205 {
 206         pr_debug("unregistering driver %s\n", driver->drv.name);
 207         driver_unregister(&driver->drv);
 208         pcmcia_free_dynids(driver);
 209 }
 210 EXPORT_SYMBOL(pcmcia_unregister_driver);
 211
 212
 213 /* pcmcia_device handling */
 214
 215 struct pcmcia_device *pcmcia_get_dev(struct pcmcia_device *p_dev)
 216 {
 217         struct device *tmp_dev;
 218         tmp_dev = get_device(&p_dev->dev);
 219         if (!tmp_dev)
 220                 return NULL;
 221         return to_pcmcia_dev(tmp_dev);
 222 }
 223
 224 void pcmcia_put_dev(struct pcmcia_device *p_dev)
 225 {
 226         if (p_dev)
 227                 put_device(&p_dev->dev);
 228 }
 229
 230 static void pcmcia_release_function(struct kref *ref)
 231 {
 232         struct config_t *c = container_of(ref, struct config_t, ref);
 233         pr_debug("releasing config_t\n");
 234         kfree(c);
 235 }
 236
 237 static void pcmcia_release_dev(struct device *dev)
 238 {
 239         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 240         dev_dbg(dev, "releasing device\n");
 241         pcmcia_put_socket(p_dev->socket);
 242         kfree(p_dev->devname);
 243         kref_put(&p_dev->function_config->ref, pcmcia_release_function);
 244         kfree(p_dev);
 245 }
 246
 247 static void pcmcia_add_device_later(struct pcmcia_socket *s, int mfc)
 248 {
 249         if (!s->pcmcia_state.device_add_pending) {
 250                 dev_dbg(&s->dev, "scheduling to add %s secondary"
 251                        " device to %d\n", mfc ? "mfc" : "pfc", s->sock);
 252                 s->pcmcia_state.device_add_pending = 1;
 253                 s->pcmcia_state.mfc_pfc = mfc;
 254                 schedule_work(&s->device_add);
 255         }
 256         return;
 257 }
 258
 259 static int pcmcia_device_probe(struct device *dev)
 260 {
 261         struct pcmcia_device *p_dev;
 262         struct pcmcia_driver *p_drv;
 263         struct pcmcia_device_id *did;
 264         struct pcmcia_socket *s;
 265         cistpl_config_t cis_config;
 266         int ret = 0;
 267
 268         dev = get_device(dev);
 269         if (!dev)
 270                 return -ENODEV;
 271
 272         p_dev = to_pcmcia_dev(dev);
 273         p_drv = to_pcmcia_drv(dev->driver);
 274         s = p_dev->socket;
 275
 276         /* The PCMCIA code passes the match data in via dev_set_drvdata(dev)
 277          * which is an ugly hack. Once the driver probe is called it may
 278          * and often will overwrite the match data so we must save it first
 279          *
 280          * handle pseudo multifunction devices:
 281          * there are at most two pseudo multifunction devices.
 282          * if we're matching against the first, schedule a
 283          * call which will then check whether there are two
 284          * pseudo devices, and if not, add the second one.
 285          */
 286         did = dev_get_drvdata(&p_dev->dev);
 287
 288         dev_dbg(dev, "trying to bind to %s\n", p_drv->drv.name);
 289
 290         if ((!p_drv->probe) || (!p_dev->function_config) ||
 291             (!try_module_get(p_drv->owner))) {
 292                 ret = -EINVAL;
 293                 goto put_dev;
 294         }
 295
 296         /* set up some more device information */
 297         ret = pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_CONFIG,
 298                                 &cis_config);
 299         if (!ret) {
 300                 p_dev->conf.ConfigBase = cis_config.base;
 301                 p_dev->conf.Present = cis_config.rmask[0];
 302         } else {
 303                 dev_printk(KERN_INFO, dev,
 304                            "pcmcia: could not parse base and rmask0 of CIS\n");
 305                 p_dev->conf.ConfigBase = 0;
 306                 p_dev->conf.Present = 0;
 307         }
 308
 309         ret = p_drv->probe(p_dev);
 310         if (ret) {
 311                 dev_dbg(dev, "binding to %s failed with %d\n",
 312                            p_drv->drv.name, ret);
 313                 goto put_module;
 314         }
 315
 316         mutex_lock(&s->ops_mutex);
 317         if (did && (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) &&
 318             (p_dev->socket->device_count == 1) && (p_dev->device_no == 0))
 319                 pcmcia_add_device_later(p_dev->socket, 0);
 320         mutex_unlock(&s->ops_mutex);
 321
 322 put_module:
 323         if (ret)
 324                 module_put(p_drv->owner);
 325 put_dev:
 326         if (ret)
 327                 put_device(dev);
 328         return ret;
 329 }
 330
 331
 332 /*
 333  * Removes a PCMCIA card from the device tree and socket list.
 334  */
 335 static void pcmcia_card_remove(struct pcmcia_socket *s, struct pcmcia_device *leftover)
 336 {
 337         struct pcmcia_device    *p_dev;
 338         struct pcmcia_device    *tmp;
 339
 340         dev_dbg(leftover ? &leftover->dev : &s->dev,
 341                    "pcmcia_card_remove(%d) %s\n", s->sock,
 342                    leftover ? leftover->devname : "");
 343
 344         mutex_lock(&s->ops_mutex);
 345         if (!leftover)
 346                 s->device_count = 0;
 347         else
 348                 s->device_count = 1;
 349         mutex_unlock(&s->ops_mutex);
 350
 351         /* unregister all pcmcia_devices registered with this socket, except leftover */
 352         list_for_each_entry_safe(p_dev, tmp, &s->devices_list, socket_device_list) {
 353                 if (p_dev == leftover)
 354                         continue;
 355
 356                 mutex_lock(&s->ops_mutex);
 357                 list_del(&p_dev->socket_device_list);
 358                 p_dev->_removed = 1;
 359                 mutex_unlock(&s->ops_mutex);
 360
 361                 dev_dbg(&p_dev->dev, "unregistering device\n");
 362                 device_unregister(&p_dev->dev);
 363         }
 364
 365         return;
 366 }
 367
 368 static int pcmcia_device_remove(struct device *dev)
 369 {
 370         struct pcmcia_device *p_dev;
 371         struct pcmcia_driver *p_drv;
 372         struct pcmcia_device_id *did;
 373         int i;
 374
 375         p_dev = to_pcmcia_dev(dev);
 376         p_drv = to_pcmcia_drv(dev->driver);
 377
 378         dev_dbg(dev, "removing device\n");
 379
 380         /* If we're removing the primary module driving a
 381          * pseudo multi-function card, we need to unbind
 382          * all devices
 383          */
 384         did = dev_get_drvdata(&p_dev->dev);
 385         if (did && (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) &&
 386             (p_dev->socket->device_count > 0) &&
 387             (p_dev->device_no == 0))
 388                 pcmcia_card_remove(p_dev->socket, p_dev);
 389
 390         /* detach the "instance" */
 391         if (!p_drv)
 392                 return 0;
 393
 394         if (p_drv->remove)
 395                 p_drv->remove(p_dev);
 396
 397         p_dev->dev_node = NULL;
 398
 399         /* check for proper unloading */
 400         if (p_dev->_irq || p_dev->_io || p_dev->_locked)
 401                 dev_printk(KERN_INFO, dev,
 402                         "pcmcia: driver %s did not release config properly\n",
 403                         p_drv->drv.name);
 404
 405         for (i = 0; i < MAX_WIN; i++)
 406                 if (p_dev->_win & CLIENT_WIN_REQ(i))
 407                         dev_printk(KERN_INFO, dev,
 408                           "pcmcia: driver %s did not release window properly\n",
 409                            p_drv->drv.name);
 410
 411         /* references from pcmcia_probe_device */
 412         pcmcia_put_dev(p_dev);
 413         module_put(p_drv->owner);
 414
 415         return 0;
 416 }
 417
 418
 419 /*
 420  * pcmcia_device_query -- determine information about a pcmcia device
 421  */
 422 static int pcmcia_device_query(struct pcmcia_device *p_dev)
 423 {
 424         cistpl_manfid_t manf_id;
 425         cistpl_funcid_t func_id;
 426         cistpl_vers_1_t *vers1;
 427         unsigned int i;
 428
 429         vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL);
 430         if (!vers1)
 431                 return -ENOMEM;
 432
 433         if (!pccard_read_tuple(p_dev->socket, BIND_FN_ALL,
 434                                CISTPL_MANFID, &manf_id)) {
 435                 p_dev->manf_id = manf_id.manf;
 436                 p_dev->card_id = manf_id.card;
 437                 p_dev->has_manf_id = 1;
 438                 p_dev->has_card_id = 1;
 439         }
 440
 441         if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 442                                CISTPL_FUNCID, &func_id)) {
 443                 p_dev->func_id = func_id.func;
 444                 p_dev->has_func_id = 1;
 445         } else {
 446                 /* rule of thumb: cards with no FUNCID, but with
 447                  * common memory device geometry information, are
 448                  * probably memory cards (from pcmcia-cs) */
 449                 cistpl_device_geo_t *devgeo;
 450
 451                 devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL);
 452                 if (!devgeo) {
 453                         kfree(vers1);
 454                         return -ENOMEM;
 455                 }
 456                 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 457                                       CISTPL_DEVICE_GEO, devgeo)) {
 458                         dev_dbg(&p_dev->dev,
 459                                    "mem device geometry probably means "
 460                                    "FUNCID_MEMORY\n");
 461                         p_dev->func_id = CISTPL_FUNCID_MEMORY;
 462                         p_dev->has_func_id = 1;
 463                 }
 464                 kfree(devgeo);
 465         }
 466
 467         if (!pccard_read_tuple(p_dev->socket, BIND_FN_ALL, CISTPL_VERS_1,
 468                                vers1)) {
 469                 for (i = 0; i < min_t(unsigned int, 4, vers1->ns); i++) {
 470                         char *tmp;
 471                         unsigned int length;
 472
 473                         tmp = vers1->str + vers1->ofs[i];
 474
 475                         length = strlen(tmp) + 1;
 476                         if ((length < 2) || (length > 255))
 477                                 continue;
 478
 479                         p_dev->prod_id[i] = kmalloc(sizeof(char) * length,
 480                                                     GFP_KERNEL);
 481                         if (!p_dev->prod_id[i])
 482                                 continue;
 483
 484                         p_dev->prod_id[i] = strncpy(p_dev->prod_id[i],
 485                                                     tmp, length);
 486                 }
 487         }
 488
 489         kfree(vers1);
 490         return 0;
 491 }
 492
 493
 494 /* device_add_lock is needed to avoid double registration by cardmgr and kernel.
 495  * Serializes pcmcia_device_add; will most likely be removed in future.
 496  *
 497  * While it has the caveat that adding new PCMCIA devices inside(!) device_register()
 498  * won't work, this doesn't matter much at the moment: the driver core doesn't
 499  * support it either.
 500  */
 501 static DEFINE_MUTEX(device_add_lock);
 502
 503 struct pcmcia_device *pcmcia_device_add(struct pcmcia_socket *s, unsigned int function)
 504 {
 505         struct pcmcia_device *p_dev, *tmp_dev;
 506
 507         s = pcmcia_get_socket(s);
 508         if (!s)
 509                 return NULL;
 510
 511         mutex_lock(&device_add_lock);
 512
 513         pr_debug("adding device to %d, function %d\n", s->sock, function);
 514
 515         p_dev = kzalloc(sizeof(struct pcmcia_device), GFP_KERNEL);
 516         if (!p_dev)
 517                 goto err_put;
 518
 519         mutex_lock(&s->ops_mutex);
 520         p_dev->device_no = (s->device_count++);
 521         mutex_unlock(&s->ops_mutex);
 522
 523         /* max of 4 devices per card */
 524         if (p_dev->device_no >= 4)
 525                 goto err_free;
 526
 527         p_dev->socket = s;
 528         p_dev->func   = function;
 529
 530         p_dev->dev.bus = &pcmcia_bus_type;
 531         p_dev->dev.parent = s->dev.parent;
 532         p_dev->dev.release = pcmcia_release_dev;
 533         /* by default don't allow DMA */
 534         p_dev->dma_mask = DMA_MASK_NONE;
 535         p_dev->dev.dma_mask = &p_dev->dma_mask;
 536         dev_set_name(&p_dev->dev, "%d.%d", p_dev->socket->sock, p_dev->device_no);
 537         if (!dev_name(&p_dev->dev))
 538                 goto err_free;
 539         p_dev->devname = kasprintf(GFP_KERNEL, "pcmcia%s", dev_name(&p_dev->dev));
 540         if (!p_dev->devname)
 541                 goto err_free;
 542         dev_dbg(&p_dev->dev, "devname is %s\n", p_dev->devname);
 543
 544         mutex_lock(&s->ops_mutex);
 545
 546         /*
 547          * p_dev->function_config must be the same for all card functions.
 548          * Note that this is serialized by the device_add_lock, so that
 549          * only one such struct will be created.
 550          */
 551         list_for_each_entry(tmp_dev, &s->devices_list, socket_device_list)
 552                 if (p_dev->func == tmp_dev->func) {
 553                         p_dev->function_config = tmp_dev->function_config;
 554                         p_dev->io = tmp_dev->io;
 555                         p_dev->irq = tmp_dev->irq;
 556                         kref_get(&p_dev->function_config->ref);
 557                 }
 558
 559         /* Add to the list in pcmcia_bus_socket */
 560         list_add(&p_dev->socket_device_list, &s->devices_list);
 561
 562         mutex_unlock(&s->ops_mutex);
 563
 564         if (!p_dev->function_config) {
 565                 dev_dbg(&p_dev->dev, "creating config_t\n");
 566                 p_dev->function_config = kzalloc(sizeof(struct config_t),
 567                                                  GFP_KERNEL);
 568                 if (!p_dev->function_config)
 569                         goto err_unreg;
 570                 kref_init(&p_dev->function_config->ref);
 571         }
 572
 573         dev_printk(KERN_NOTICE, &p_dev->dev,
 574                    "pcmcia: registering new device %s\n",
 575                    p_dev->devname);
 576
 577         pcmcia_device_query(p_dev);
 578
 579         if (device_register(&p_dev->dev))
 580                 goto err_unreg;
 581
 582         mutex_unlock(&device_add_lock);
 583
 584         return p_dev;
 585
 586  err_unreg:
 587         mutex_lock(&s->ops_mutex);
 588         list_del(&p_dev->socket_device_list);
 589         mutex_unlock(&s->ops_mutex);
 590
 591  err_free:
 592         mutex_lock(&s->ops_mutex);
 593         s->device_count--;
 594         mutex_unlock(&s->ops_mutex);
 595
 596         kfree(p_dev->devname);
 597         kfree(p_dev);
 598  err_put:
 599         mutex_unlock(&device_add_lock);
 600         pcmcia_put_socket(s);
 601
 602         return NULL;
 603 }
 604
 605
 606 static int pcmcia_card_add(struct pcmcia_socket *s)
 607 {
 608         cistpl_longlink_mfc_t mfc;
 609         unsigned int no_funcs, i, no_chains;
 610         int ret = -EAGAIN;
 611
 612         mutex_lock(&s->ops_mutex);
 613         if (!(s->resource_setup_done)) {
 614                 dev_dbg(&s->dev,
 615                            "no resources available, delaying card_add\n");
 616                 mutex_unlock(&s->ops_mutex);
 617                 return -EAGAIN; /* try again, but later... */
 618         }
 619
 620         if (pcmcia_validate_mem(s)) {
 621                 dev_dbg(&s->dev, "validating mem resources failed, "
 622                        "delaying card_add\n");
 623                 mutex_unlock(&s->ops_mutex);
 624                 return -EAGAIN; /* try again, but later... */
 625         }
 626         mutex_unlock(&s->ops_mutex);
 627
 628         ret = pccard_validate_cis(s, &no_chains);
 629         if (ret || !no_chains) {
 630                 dev_dbg(&s->dev, "invalid CIS or invalid resources\n");
 631                 return -ENODEV;
 632         }
 633
 634         if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
 635                 no_funcs = mfc.nfn;
 636         else
 637                 no_funcs = 1;
 638         s->functions = no_funcs;
 639
 640         for (i = 0; i < no_funcs; i++)
 641                 pcmcia_device_add(s, i);
 642
 643         return ret;
 644 }
 645
 646
 647 static void pcmcia_delayed_add_device(struct work_struct *work)
 648 {
 649         struct pcmcia_socket *s =
 650                 container_of(work, struct pcmcia_socket, device_add);
 651         u8 mfc_pfc;
 652
 653         mutex_lock(&s->ops_mutex);
 654         mfc_pfc = s->pcmcia_state.mfc_pfc;
 655         s->pcmcia_state.device_add_pending = 0;
 656         s->pcmcia_state.mfc_pfc = 0;
 657         mutex_unlock(&s->ops_mutex);
 658
 659         dev_dbg(&s->dev, "adding additional device to %d\n", s->sock);
 660         pcmcia_device_add(s, mfc_pfc);
 661 }
 662
 663 static int pcmcia_requery(struct device *dev, void * _data)
 664 {
 665         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 666         if (!p_dev->dev.driver) {
 667                 dev_dbg(dev, "update device information\n");
 668                 pcmcia_device_query(p_dev);
 669         }
 670
 671         return 0;
 672 }
 673
 674 static void pcmcia_bus_rescan(struct pcmcia_socket *skt, int new_cis)
 675 {
 676         int no_devices = 0;
 677         int ret = 0;
 678
 679         /* must be called with skt_mutex held */
 680         dev_dbg(&skt->dev, "re-scanning socket %d\n", skt->sock);
 681
 682         mutex_lock(&skt->ops_mutex);
 683         if (list_empty(&skt->devices_list))
 684                 no_devices = 1;
 685         mutex_unlock(&skt->ops_mutex);
 686
 687         /* If this is because of a CIS override, start over */
 688         if (new_cis && !no_devices)
 689                 pcmcia_card_remove(skt, NULL);
 690
 691         /* if no devices were added for this socket yet because of
 692          * missing resource information or other trouble, we need to
 693          * do this now. */
 694         if (no_devices || new_cis) {
 695                 ret = pcmcia_card_add(skt);
 696                 if (ret)
 697                         return;
 698         }
 699
 700         /* some device information might have changed because of a CIS
 701          * update or because we can finally read it correctly... so
 702          * determine it again, overwriting old values if necessary. */
 703         bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery);
 704
 705         /* we re-scan all devices, not just the ones connected to this
 706          * socket. This does not matter, though. */
 707         ret = bus_rescan_devices(&pcmcia_bus_type);
 708         if (ret)
 709                 printk(KERN_INFO "pcmcia: bus_rescan_devices failed\n");
 710 }
 711
 712 #ifdef CONFIG_PCMCIA_LOAD_CIS
 713
 714 /**
 715  * pcmcia_load_firmware - load CIS from userspace if device-provided is broken
 716  * @dev: the pcmcia device which needs a CIS override
 717  * @filename: requested filename in /lib/firmware/
 718  *
 719  * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if
 720  * the one provided by the card is broken. The firmware files reside in
 721  * /lib/firmware/ in userspace.
 722  */
 723 static int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
 724 {
 725         struct pcmcia_socket *s = dev->socket;
 726         const struct firmware *fw;
 727         int ret = -ENOMEM;
 728         int no_funcs;
 729         int old_funcs;
 730         cistpl_longlink_mfc_t mfc;
 731
 732         if (!filename)
 733                 return -EINVAL;
 734
 735         dev_dbg(&dev->dev, "trying to load CIS file %s\n", filename);
 736
 737         if (request_firmware(&fw, filename, &dev->dev) == 0) {
 738                 if (fw->size >= CISTPL_MAX_CIS_SIZE) {
 739                         ret = -EINVAL;
 740                         dev_printk(KERN_ERR, &dev->dev,
 741                                    "pcmcia: CIS override is too big\n");
 742                         goto release;
 743                 }
 744
 745                 if (!pcmcia_replace_cis(s, fw->data, fw->size))
 746                         ret = 0;
 747                 else {
 748                         dev_printk(KERN_ERR, &dev->dev,
 749                                    "pcmcia: CIS override failed\n");
 750                         goto release;
 751                 }
 752
 753
 754                 /* update information */
 755                 pcmcia_device_query(dev);
 756
 757                 /* does this cis override add or remove functions? */
 758                 old_funcs = s->functions;
 759
 760                 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
 761                         no_funcs = mfc.nfn;
 762                 else
 763                         no_funcs = 1;
 764                 s->functions = no_funcs;
 765
 766                 if (old_funcs > no_funcs)
 767                         pcmcia_card_remove(s, dev);
 768                 else if (no_funcs > old_funcs) {
 769                         mutex_lock(&s->ops_mutex);
 770                         pcmcia_add_device_later(s, 1);
 771                         mutex_unlock(&s->ops_mutex);
 772                 }
 773         }
 774  release:
 775         release_firmware(fw);
 776
 777         return ret;
 778 }
 779
 780 #else /* !CONFIG_PCMCIA_LOAD_CIS */
 781
 782 static inline int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
 783 {
 784         return -ENODEV;
 785 }
 786
 787 #endif
 788
 789
 790 static inline int pcmcia_devmatch(struct pcmcia_device *dev,
 791                                   struct pcmcia_device_id *did)
 792 {
 793         if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
 794                 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
 795                         return 0;
 796         }
 797
 798         if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
 799                 if ((!dev->has_card_id) || (dev->card_id != did->card_id))
 800                         return 0;
 801         }
 802
 803         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
 804                 if (dev->func != did->function)
 805                         return 0;
 806         }
 807
 808         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
 809                 if (!dev->prod_id[0])
 810                         return 0;
 811                 if (strcmp(did->prod_id[0], dev->prod_id[0]))
 812                         return 0;
 813         }
 814
 815         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
 816                 if (!dev->prod_id[1])
 817                         return 0;
 818                 if (strcmp(did->prod_id[1], dev->prod_id[1]))
 819                         return 0;
 820         }
 821
 822         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
 823                 if (!dev->prod_id[2])
 824                         return 0;
 825                 if (strcmp(did->prod_id[2], dev->prod_id[2]))
 826                         return 0;
 827         }
 828
 829         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
 830                 if (!dev->prod_id[3])
 831                         return 0;
 832                 if (strcmp(did->prod_id[3], dev->prod_id[3]))
 833                         return 0;
 834         }
 835
 836         if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
 837                 if (dev->device_no != did->device_no)
 838                         return 0;
 839         }
 840
 841         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
 842                 int ret;
 843
 844                 if ((!dev->has_func_id) || (dev->func_id != did->func_id))
 845                         return 0;
 846
 847                 /* if this is a pseudo-multi-function device,
 848                  * we need explicit matches */
 849                 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO)
 850                         return 0;
 851                 if (dev->device_no)
 852                         return 0;
 853
 854                 /* also, FUNC_ID matching needs to be activated by userspace
 855                  * after it has re-checked that there is no possible module
 856                  * with a prod_id/manf_id/card_id match.
 857                  */
 858                 mutex_lock(&dev->socket->ops_mutex);
 859                 ret = dev->allow_func_id_match;
 860                 mutex_unlock(&dev->socket->ops_mutex);
 861
 862                 if (!ret) {
 863                         dev_dbg(&dev->dev,
 864                                 "skipping FUNC_ID match until userspace ACK\n");
 865                         return 0;
 866                 }
 867         }
 868
 869         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
 870                 dev_dbg(&dev->dev, "device needs a fake CIS\n");
 871                 if (!dev->socket->fake_cis)
 872                         pcmcia_load_firmware(dev, did->cisfile);
 873
 874                 if (!dev->socket->fake_cis)
 875                         return 0;
 876         }
 877
 878         if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
 879                 int i;
 880                 for (i = 0; i < 4; i++)
 881                         if (dev->prod_id[i])
 882                                 return 0;
 883                 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
 884                         return 0;
 885         }
 886
 887         dev_set_drvdata(&dev->dev, did);
 888
 889         return 1;
 890 }
 891
 892
 893 static int pcmcia_bus_match(struct device *dev, struct device_driver *drv)
 894 {
 895         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 896         struct pcmcia_driver *p_drv = to_pcmcia_drv(drv);
 897         struct pcmcia_device_id *did = p_drv->id_table;
 898         struct pcmcia_dynid *dynid;
 899
 900         /* match dynamic devices first */
 901         mutex_lock(&p_drv->dynids.lock);
 902         list_for_each_entry(dynid, &p_drv->dynids.list, node) {
 903                 dev_dbg(dev, "trying to match to %s\n", drv->name);
 904                 if (pcmcia_devmatch(p_dev, &dynid->id)) {
 905                         dev_dbg(dev, "matched to %s\n", drv->name);
 906                         mutex_unlock(&p_drv->dynids.lock);
 907                         return 1;
 908                 }
 909         }
 910         mutex_unlock(&p_drv->dynids.lock);
 911
 912 #ifdef CONFIG_PCMCIA_IOCTL
 913         /* matching by cardmgr */
 914         if (p_dev->cardmgr == p_drv) {
 915                 dev_dbg(dev, "cardmgr matched to %s\n", drv->name);
 916                 return 1;
 917         }
 918 #endif
 919
 920         while (did && did->match_flags) {
 921                 dev_dbg(dev, "trying to match to %s\n", drv->name);
 922                 if (pcmcia_devmatch(p_dev, did)) {
 923                         dev_dbg(dev, "matched to %s\n", drv->name);
 924                         return 1;
 925                 }
 926                 did++;
 927         }
 928
 929         return 0;
 930 }
 931
 932 #ifdef CONFIG_HOTPLUG
 933
 934 static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
 935 {
 936         struct pcmcia_device *p_dev;
 937         int i;
 938         u32 hash[4] = { 0, 0, 0, 0};
 939
 940         if (!dev)
 941                 return -ENODEV;
 942
 943         p_dev = to_pcmcia_dev(dev);
 944
 945         /* calculate hashes */
 946         for (i = 0; i < 4; i++) {
 947                 if (!p_dev->prod_id[i])
 948                         continue;
 949                 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
 950         }
 951
 952         if (add_uevent_var(env, "SOCKET_NO=%u", p_dev->socket->sock))
 953                 return -ENOMEM;
 954
 955         if (add_uevent_var(env, "DEVICE_NO=%02X", p_dev->device_no))
 956                 return -ENOMEM;
 957
 958         if (add_uevent_var(env, "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
 959                            "pa%08Xpb%08Xpc%08Xpd%08X",
 960                            p_dev->has_manf_id ? p_dev->manf_id : 0,
 961                            p_dev->has_card_id ? p_dev->card_id : 0,
 962                            p_dev->has_func_id ? p_dev->func_id : 0,
 963                            p_dev->func,
 964                            p_dev->device_no,
 965                            hash[0],
 966                            hash[1],
 967                            hash[2],
 968                            hash[3]))
 969                 return -ENOMEM;
 970
 971         return 0;
 972 }
 973
 974 #else
 975
 976 static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
 977 {
 978         return -ENODEV;
 979 }
 980
 981 #endif
 982
 983 /************************ runtime PM support ***************************/
 984
 985 static int pcmcia_dev_suspend(struct device *dev, pm_message_t state);
 986 static int pcmcia_dev_resume(struct device *dev);
 987
 988 static int runtime_suspend(struct device *dev)
 989 {
 990         int rc;
 991
 992         down(&dev->sem);
 993         rc = pcmcia_dev_suspend(dev, PMSG_SUSPEND);
 994         up(&dev->sem);
 995         return rc;
 996 }
 997
 998 static int runtime_resume(struct device *dev)
 999 {
1000         int rc;
1001
1002         down(&dev->sem);
1003         rc = pcmcia_dev_resume(dev);
1004         up(&dev->sem);
1005         return rc;
1006 }
1007
1008 /************************ per-device sysfs output ***************************/
1009
1010 #define pcmcia_device_attr(field, test, format)                         \
1011 static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf)              \
1012 {                                                                       \
1013         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);               \
1014         return p_dev->test ? sprintf(buf, format, p_dev->field) : -ENODEV; \
1015 }
1016
1017 #define pcmcia_device_stringattr(name, field)                                   \
1018 static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf)               \
1019 {                                                                       \
1020         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);               \
1021         return p_dev->field ? sprintf(buf, "%s\n", p_dev->field) : -ENODEV; \
1022 }
1023
1024 pcmcia_device_attr(func, socket, "0x%02x\n");
1025 pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
1026 pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
1027 pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
1028 pcmcia_device_stringattr(prod_id1, prod_id[0]);
1029 pcmcia_device_stringattr(prod_id2, prod_id[1]);
1030 pcmcia_device_stringattr(prod_id3, prod_id[2]);
1031 pcmcia_device_stringattr(prod_id4, prod_id[3]);
1032
1033
1034 static ssize_t pcmcia_show_pm_state(struct device *dev, struct device_attribute *attr, char *buf)
1035 {
1036         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1037
1038         if (p_dev->suspended)
1039                 return sprintf(buf, "off\n");
1040         else
1041                 return sprintf(buf, "on\n");
1042 }
1043
1044 static ssize_t pcmcia_store_pm_state(struct device *dev, struct device_attribute *attr,
1045                                      const char *buf, size_t count)
1046 {
1047         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1048         int ret = 0;
1049
1050         if (!count)
1051                 return -EINVAL;
1052
1053         if ((!p_dev->suspended) && !strncmp(buf, "off", 3))
1054                 ret = runtime_suspend(dev);
1055         else if (p_dev->suspended && !strncmp(buf, "on", 2))
1056                 ret = runtime_resume(dev);
1057
1058         return ret ? ret : count;
1059 }
1060
1061
1062 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1063 {
1064         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1065         int i;
1066         u32 hash[4] = { 0, 0, 0, 0};
1067
1068         /* calculate hashes */
1069         for (i = 0; i < 4; i++) {
1070                 if (!p_dev->prod_id[i])
1071                         continue;
1072                 hash[i] = crc32(0, p_dev->prod_id[i],
1073                                 strlen(p_dev->prod_id[i]));
1074         }
1075         return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
1076                                 "pa%08Xpb%08Xpc%08Xpd%08X\n",
1077                                 p_dev->has_manf_id ? p_dev->manf_id : 0,
1078                                 p_dev->has_card_id ? p_dev->card_id : 0,
1079                                 p_dev->has_func_id ? p_dev->func_id : 0,
1080                                 p_dev->func, p_dev->device_no,
1081                                 hash[0], hash[1], hash[2], hash[3]);
1082 }
1083
1084 static ssize_t pcmcia_store_allow_func_id_match(struct device *dev,
1085                 struct device_attribute *attr, const char *buf, size_t count)
1086 {
1087         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1088         int ret;
1089
1090         if (!count)
1091                 return -EINVAL;
1092
1093         mutex_lock(&p_dev->socket->ops_mutex);
1094         p_dev->allow_func_id_match = 1;
1095         mutex_unlock(&p_dev->socket->ops_mutex);
1096
1097         ret = bus_rescan_devices(&pcmcia_bus_type);
1098         if (ret)
1099                 printk(KERN_INFO "pcmcia: bus_rescan_devices failed after "
1100                        "allowing func_id matches\n");
1101
1102         return count;
1103 }
1104
1105 static struct device_attribute pcmcia_dev_attrs[] = {
1106         __ATTR(function, 0444, func_show, NULL),
1107         __ATTR(pm_state, 0644, pcmcia_show_pm_state, pcmcia_store_pm_state),
1108         __ATTR_RO(func_id),
1109         __ATTR_RO(manf_id),
1110         __ATTR_RO(card_id),
1111         __ATTR_RO(prod_id1),
1112         __ATTR_RO(prod_id2),
1113         __ATTR_RO(prod_id3),
1114         __ATTR_RO(prod_id4),
1115         __ATTR_RO(modalias),
1116         __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match),
1117         __ATTR_NULL,
1118 };
1119
1120 /* PM support, also needed for reset */
1121
1122 static int pcmcia_dev_suspend(struct device *dev, pm_message_t state)
1123 {
1124         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1125         struct pcmcia_driver *p_drv = NULL;
1126         int ret = 0;
1127
1128         mutex_lock(&p_dev->socket->ops_mutex);
1129         if (p_dev->suspended) {
1130                 mutex_unlock(&p_dev->socket->ops_mutex);
1131                 return 0;
1132         }
1133         p_dev->suspended = 1;
1134         mutex_unlock(&p_dev->socket->ops_mutex);
1135
1136         dev_dbg(dev, "suspending\n");
1137
1138         if (dev->driver)
1139                 p_drv = to_pcmcia_drv(dev->driver);
1140
1141         if (!p_drv)
1142                 goto out;
1143
1144         if (p_drv->suspend) {
1145                 ret = p_drv->suspend(p_dev);
1146                 if (ret) {
1147                         dev_printk(KERN_ERR, dev,
1148                                    "pcmcia: device %s (driver %s) did "
1149                                    "not want to go to sleep (%d)\n",
1150                                    p_dev->devname, p_drv->drv.name, ret);
1151                         mutex_lock(&p_dev->socket->ops_mutex);
1152                         p_dev->suspended = 0;
1153                         mutex_unlock(&p_dev->socket->ops_mutex);
1154                         goto out;
1155                 }
1156         }
1157
1158         if (p_dev->device_no == p_dev->func) {
1159                 dev_dbg(dev, "releasing configuration\n");
1160                 pcmcia_release_configuration(p_dev);
1161         }
1162
1163  out:
1164         return ret;
1165 }
1166
1167
1168 static int pcmcia_dev_resume(struct device *dev)
1169 {
1170         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1171         struct pcmcia_driver *p_drv = NULL;
1172         int ret = 0;
1173
1174         mutex_lock(&p_dev->socket->ops_mutex);
1175         if (!p_dev->suspended) {
1176                 mutex_unlock(&p_dev->socket->ops_mutex);
1177                 return 0;
1178         }
1179         p_dev->suspended = 0;
1180         mutex_unlock(&p_dev->socket->ops_mutex);
1181
1182         dev_dbg(dev, "resuming\n");
1183
1184         if (dev->driver)
1185                 p_drv = to_pcmcia_drv(dev->driver);
1186
1187         if (!p_drv)
1188                 goto out;
1189
1190         if (p_dev->device_no == p_dev->func) {
1191                 dev_dbg(dev, "requesting configuration\n");
1192                 ret = pcmcia_request_configuration(p_dev, &p_dev->conf);
1193                 if (ret)
1194                         goto out;
1195         }
1196
1197         if (p_drv->resume)
1198                 ret = p_drv->resume(p_dev);
1199
1200  out:
1201         return ret;
1202 }
1203
1204
1205 static int pcmcia_bus_suspend_callback(struct device *dev, void * _data)
1206 {
1207         struct pcmcia_socket *skt = _data;
1208         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1209
1210         if (p_dev->socket != skt || p_dev->suspended)
1211                 return 0;
1212
1213         return runtime_suspend(dev);
1214 }
1215
1216 static int pcmcia_bus_resume_callback(struct device *dev, void * _data)
1217 {
1218         struct pcmcia_socket *skt = _data;
1219         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1220
1221         if (p_dev->socket != skt || !p_dev->suspended)
1222                 return 0;
1223
1224         runtime_resume(dev);
1225
1226         return 0;
1227 }
1228
1229 static int pcmcia_bus_resume(struct pcmcia_socket *skt)
1230 {
1231         dev_dbg(&skt->dev, "resuming socket %d\n", skt->sock);
1232         bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback);
1233         return 0;
1234 }
1235
1236 static int pcmcia_bus_suspend(struct pcmcia_socket *skt)
1237 {
1238         dev_dbg(&skt->dev, "suspending socket %d\n", skt->sock);
1239         if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt,
1240                              pcmcia_bus_suspend_callback)) {
1241                 pcmcia_bus_resume(skt);
1242                 return -EIO;
1243         }
1244         return 0;
1245 }
1246
1247
1248 /*======================================================================
1249
1250     The card status event handler.
1251
1252 ======================================================================*/
1253
1254 /* Normally, the event is passed to individual drivers after
1255  * informing userspace. Only for CS_EVENT_CARD_REMOVAL this
1256  * is inversed to maintain historic compatibility.
1257  */
1258
1259 static int ds_event(struct pcmcia_socket *skt, event_t event, int priority)
1260 {
1261         struct pcmcia_socket *s = pcmcia_get_socket(skt);
1262
1263         if (!s) {
1264                 dev_printk(KERN_ERR, &skt->dev,
1265                            "PCMCIA obtaining reference to socket "      \
1266                            "failed, event 0x%x lost!\n", event);
1267                 return -ENODEV;
1268         }
1269
1270         dev_dbg(&skt->dev, "ds_event(0x%06x, %d, 0x%p)\n",
1271                    event, priority, skt);
1272
1273         switch (event) {
1274         case CS_EVENT_CARD_REMOVAL:
1275                 mutex_lock(&s->ops_mutex);
1276                 s->pcmcia_state.present = 0;
1277                 mutex_unlock(&s->ops_mutex);
1278                 pcmcia_card_remove(skt, NULL);
1279                 handle_event(skt, event);
1280                 mutex_lock(&s->ops_mutex);
1281                 destroy_cis_cache(s);
1282                 mutex_unlock(&s->ops_mutex);
1283                 break;
1284
1285         case CS_EVENT_CARD_INSERTION:
1286                 mutex_lock(&s->ops_mutex);
1287                 s->pcmcia_state.present = 1;
1288                 destroy_cis_cache(s); /* to be on the safe side... */
1289                 mutex_unlock(&s->ops_mutex);
1290                 pcmcia_card_add(skt);
1291                 handle_event(skt, event);
1292                 break;
1293
1294         case CS_EVENT_EJECTION_REQUEST:
1295                 break;
1296
1297         case CS_EVENT_PM_RESUME:
1298                 if (verify_cis_cache(skt) != 0) {
1299                         dev_dbg(&skt->dev, "cis mismatch - different card\n");
1300                         /* first, remove the card */
1301                         ds_event(skt, CS_EVENT_CARD_REMOVAL, CS_EVENT_PRI_HIGH);
1302                         mutex_lock(&s->ops_mutex);
1303                         destroy_cis_cache(skt);
1304                         kfree(skt->fake_cis);
1305                         skt->fake_cis = NULL;
1306                         mutex_unlock(&s->ops_mutex);
1307                         /* now, add the new card */
1308                         ds_event(skt, CS_EVENT_CARD_INSERTION,
1309                                  CS_EVENT_PRI_LOW);
1310                 }
1311                 handle_event(skt, event);
1312                 break;
1313
1314         case CS_EVENT_PM_SUSPEND:
1315         case CS_EVENT_RESET_PHYSICAL:
1316         case CS_EVENT_CARD_RESET:
1317         default:
1318                 handle_event(skt, event);
1319                 break;
1320     }
1321
1322     pcmcia_put_socket(s);
1323
1324     return 0;
1325 } /* ds_event */
1326
1327
1328 struct pcmcia_device *pcmcia_dev_present(struct pcmcia_device *_p_dev)
1329 {
1330         struct pcmcia_device *p_dev;
1331         struct pcmcia_device *ret = NULL;
1332
1333         p_dev = pcmcia_get_dev(_p_dev);
1334         if (!p_dev)
1335                 return NULL;
1336
1337         mutex_lock(&p_dev->socket->ops_mutex);
1338         if (!p_dev->socket->pcmcia_state.present)
1339                 goto out;
1340
1341         if (p_dev->socket->pcmcia_state.dead)
1342                 goto out;
1343
1344         if (p_dev->_removed)
1345                 goto out;
1346
1347         if (p_dev->suspended)
1348                 goto out;
1349
1350         ret = p_dev;
1351  out:
1352         mutex_unlock(&p_dev->socket->ops_mutex);
1353         pcmcia_put_dev(p_dev);
1354         return ret;
1355 }
1356 EXPORT_SYMBOL(pcmcia_dev_present);
1357
1358
1359 static struct pcmcia_callback pcmcia_bus_callback = {
1360         .owner = THIS_MODULE,
1361         .event = ds_event,
1362         .requery = pcmcia_bus_rescan,
1363         .validate = pccard_validate_cis,
1364         .suspend = pcmcia_bus_suspend,
1365         .resume = pcmcia_bus_resume,
1366 };
1367
1368 static int __devinit pcmcia_bus_add_socket(struct device *dev,
1369                                            struct class_interface *class_intf)
1370 {
1371         struct pcmcia_socket *socket = dev_get_drvdata(dev);
1372         int ret;
1373
1374         socket = pcmcia_get_socket(socket);
1375         if (!socket) {
1376                 dev_printk(KERN_ERR, dev,
1377                            "PCMCIA obtaining reference to socket failed\n");
1378                 return -ENODEV;
1379         }
1380
1381         /*
1382          * Ugly. But we want to wait for the socket threads to have started up.
1383          * We really should let the drivers themselves drive some of this..
1384          */
1385         msleep(250);
1386
1387         ret = sysfs_create_bin_file(&dev->kobj, &pccard_cis_attr);
1388         if (ret) {
1389                 dev_printk(KERN_ERR, dev, "PCMCIA registration failed\n");
1390                 pcmcia_put_socket(socket);
1391                 return ret;
1392         }
1393
1394 #ifdef CONFIG_PCMCIA_IOCTL
1395         init_waitqueue_head(&socket->queue);
1396 #endif
1397         INIT_LIST_HEAD(&socket->devices_list);
1398         INIT_WORK(&socket->device_add, pcmcia_delayed_add_device);
1399         memset(&socket->pcmcia_state, 0, sizeof(u8));
1400         socket->device_count = 0;
1401
1402         ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback);
1403         if (ret) {
1404                 dev_printk(KERN_ERR, dev, "PCMCIA registration failed\n");
1405                 pcmcia_put_socket(socket);
1406                 return ret;
1407         }
1408
1409         return 0;
1410 }
1411
1412 static void pcmcia_bus_remove_socket(struct device *dev,
1413                                      struct class_interface *class_intf)
1414 {
1415         struct pcmcia_socket *socket = dev_get_drvdata(dev);
1416
1417         if (!socket)
1418                 return;
1419
1420         mutex_lock(&socket->ops_mutex);
1421         socket->pcmcia_state.dead = 1;
1422         mutex_unlock(&socket->ops_mutex);
1423
1424         pccard_register_pcmcia(socket, NULL);
1425
1426         /* unregister any unbound devices */
1427         mutex_lock(&socket->skt_mutex);
1428         pcmcia_card_remove(socket, NULL);
1429         release_cis_mem(socket);
1430         mutex_unlock(&socket->skt_mutex);
1431
1432         sysfs_remove_bin_file(&dev->kobj, &pccard_cis_attr);
1433
1434         pcmcia_put_socket(socket);
1435
1436         return;
1437 }
1438
1439
1440 /* the pcmcia_bus_interface is used to handle pcmcia socket devices */
1441 static struct class_interface pcmcia_bus_interface __refdata = {
1442         .class = &pcmcia_socket_class,
1443         .add_dev = &pcmcia_bus_add_socket,
1444         .remove_dev = &pcmcia_bus_remove_socket,
1445 };
1446
1447
1448 struct bus_type pcmcia_bus_type = {
1449         .name = "pcmcia",
1450         .uevent = pcmcia_bus_uevent,
1451         .match = pcmcia_bus_match,
1452         .dev_attrs = pcmcia_dev_attrs,
1453         .probe = pcmcia_device_probe,
1454         .remove = pcmcia_device_remove,
1455         .suspend = pcmcia_dev_suspend,
1456         .resume = pcmcia_dev_resume,
1457 };
1458
1459
1460 static int __init init_pcmcia_bus(void)
1461 {
1462         int ret;
1463
1464         ret = bus_register(&pcmcia_bus_type);
1465         if (ret < 0) {
1466                 printk(KERN_WARNING "pcmcia: bus_register error: %d\n", ret);
1467                 return ret;
1468         }
1469         ret = class_interface_register(&pcmcia_bus_interface);
1470         if (ret < 0) {
1471                 printk(KERN_WARNING
1472                         "pcmcia: class_interface_register error: %d\n", ret);
1473                 bus_unregister(&pcmcia_bus_type);
1474                 return ret;
1475         }
1476
1477         pcmcia_setup_ioctl();
1478
1479         return 0;
1480 }
1481 fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that
1482                                * pcmcia_socket_class is already registered */
1483
1484
1485 static void __exit exit_pcmcia_bus(void)
1486 {
1487         pcmcia_cleanup_ioctl();
1488
1489         class_interface_unregister(&pcmcia_bus_interface);
1490
1491         bus_unregister(&pcmcia_bus_type);
1492 }
1493 module_exit(exit_pcmcia_bus);
1494
1495
1496 MODULE_ALIAS("ds");