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 #include <linux/slab.h>
  28
  29 #include <pcmcia/cs_types.h>
  30 #include <pcmcia/cs.h>
  31 #include <pcmcia/cistpl.h>
  32 #include <pcmcia/ds.h>
  33 #include <pcmcia/ss.h>
  34
  35 #include "cs_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
  46 /*====================================================================*/
  47
  48 static void pcmcia_check_driver(struct pcmcia_driver *p_drv)
  49 {
  50         struct pcmcia_device_id *did = p_drv->id_table;
  51         unsigned int i;
  52         u32 hash;
  53
  54         if (!p_drv->probe || !p_drv->remove)
  55                 printk(KERN_DEBUG "pcmcia: %s lacks a requisite callback "
  56                        "function\n", p_drv->drv.name);
  57
  58         while (did && did->match_flags) {
  59                 for (i = 0; i < 4; i++) {
  60                         if (!did->prod_id[i])
  61                                 continue;
  62
  63                         hash = crc32(0, did->prod_id[i], strlen(did->prod_id[i]));
  64                         if (hash == did->prod_id_hash[i])
  65                                 continue;
  66
  67                         printk(KERN_DEBUG "pcmcia: %s: invalid hash for "
  68                                "product string \"%s\": is 0x%x, should "
  69                                "be 0x%x\n", p_drv->drv.name, did->prod_id[i],
  70                                did->prod_id_hash[i], hash);
  71                         printk(KERN_DEBUG "pcmcia: see "
  72                                 "Documentation/pcmcia/devicetable.txt for "
  73                                 "details\n");
  74                 }
  75                 did++;
  76         }
  77
  78         return;
  79 }
  80
  81
  82 /*======================================================================*/
  83
  84
  85 struct pcmcia_dynid {
  86         struct list_head                node;
  87         struct pcmcia_device_id         id;
  88 };
  89
  90 /**
  91  * pcmcia_store_new_id - add a new PCMCIA device ID to this driver and re-probe devices
  92  * @driver: target device driver
  93  * @buf: buffer for scanning device ID data
  94  * @count: input size
  95  *
  96  * Adds a new dynamic PCMCIA device ID to this driver,
  97  * and causes the driver to probe for all devices again.
  98  */
  99 static ssize_t
 100 pcmcia_store_new_id(struct device_driver *driver, const char *buf, size_t count)
 101 {
 102         struct pcmcia_dynid *dynid;
 103         struct pcmcia_driver *pdrv = to_pcmcia_drv(driver);
 104         __u16 match_flags, manf_id, card_id;
 105         __u8 func_id, function, device_no;
 106         __u32 prod_id_hash[4] = {0, 0, 0, 0};
 107         int fields = 0;
 108         int retval = 0;
 109
 110         fields = sscanf(buf, "%hx %hx %hx %hhx %hhx %hhx %x %x %x %x",
 111                         &match_flags, &manf_id, &card_id, &func_id, &function, &device_no,
 112                         &prod_id_hash[0], &prod_id_hash[1], &prod_id_hash[2], &prod_id_hash[3]);
 113         if (fields < 6)
 114                 return -EINVAL;
 115
 116         dynid = kzalloc(sizeof(struct pcmcia_dynid), GFP_KERNEL);
 117         if (!dynid)
 118                 return -ENOMEM;
 119
 120         dynid->id.match_flags = match_flags;
 121         dynid->id.manf_id = manf_id;
 122         dynid->id.card_id = card_id;
 123         dynid->id.func_id = func_id;
 124         dynid->id.function = function;
 125         dynid->id.device_no = device_no;
 126         memcpy(dynid->id.prod_id_hash, prod_id_hash, sizeof(__u32) * 4);
 127
 128         mutex_lock(&pdrv->dynids.lock);
 129         list_add_tail(&dynid->node, &pdrv->dynids.list);
 130         mutex_unlock(&pdrv->dynids.lock);
 131
 132         if (get_driver(&pdrv->drv)) {
 133                 retval = driver_attach(&pdrv->drv);
 134                 put_driver(&pdrv->drv);
 135         }
 136
 137         if (retval)
 138                 return retval;
 139         return count;
 140 }
 141 static DRIVER_ATTR(new_id, S_IWUSR, NULL, pcmcia_store_new_id);
 142
 143 static void
 144 pcmcia_free_dynids(struct pcmcia_driver *drv)
 145 {
 146         struct pcmcia_dynid *dynid, *n;
 147
 148         mutex_lock(&drv->dynids.lock);
 149         list_for_each_entry_safe(dynid, n, &drv->dynids.list, node) {
 150                 list_del(&dynid->node);
 151                 kfree(dynid);
 152         }
 153         mutex_unlock(&drv->dynids.lock);
 154 }
 155
 156 static int
 157 pcmcia_create_newid_file(struct pcmcia_driver *drv)
 158 {
 159         int error = 0;
 160         if (drv->probe != NULL)
 161                 error = driver_create_file(&drv->drv, &driver_attr_new_id);
 162         return error;
 163 }
 164
 165
 166 /**
 167  * pcmcia_register_driver - register a PCMCIA driver with the bus core
 168  * @driver: the &driver being registered
 169  *
 170  * Registers a PCMCIA driver with the PCMCIA bus core.
 171  */
 172 int pcmcia_register_driver(struct pcmcia_driver *driver)
 173 {
 174         int error;
 175
 176         if (!driver)
 177                 return -EINVAL;
 178
 179         pcmcia_check_driver(driver);
 180
 181         /* initialize common fields */
 182         driver->drv.bus = &pcmcia_bus_type;
 183         driver->drv.owner = driver->owner;
 184         mutex_init(&driver->dynids.lock);
 185         INIT_LIST_HEAD(&driver->dynids.list);
 186
 187         pr_debug("registering driver %s\n", driver->drv.name);
 188
 189         error = driver_register(&driver->drv);
 190         if (error < 0)
 191                 return error;
 192
 193         error = pcmcia_create_newid_file(driver);
 194         if (error)
 195                 driver_unregister(&driver->drv);
 196
 197         return error;
 198 }
 199 EXPORT_SYMBOL(pcmcia_register_driver);
 200
 201 /**
 202  * pcmcia_unregister_driver - unregister a PCMCIA driver with the bus core
 203  * @driver: the &driver being unregistered
 204  */
 205 void pcmcia_unregister_driver(struct pcmcia_driver *driver)
 206 {
 207         pr_debug("unregistering driver %s\n", driver->drv.name);
 208         driver_unregister(&driver->drv);
 209         pcmcia_free_dynids(driver);
 210 }
 211 EXPORT_SYMBOL(pcmcia_unregister_driver);
 212
 213
 214 /* pcmcia_device handling */
 215
 216 struct pcmcia_device *pcmcia_get_dev(struct pcmcia_device *p_dev)
 217 {
 218         struct device *tmp_dev;
 219         tmp_dev = get_device(&p_dev->dev);
 220         if (!tmp_dev)
 221                 return NULL;
 222         return to_pcmcia_dev(tmp_dev);
 223 }
 224
 225 void pcmcia_put_dev(struct pcmcia_device *p_dev)
 226 {
 227         if (p_dev)
 228                 put_device(&p_dev->dev);
 229 }
 230
 231 static void pcmcia_release_function(struct kref *ref)
 232 {
 233         struct config_t *c = container_of(ref, struct config_t, ref);
 234         pr_debug("releasing config_t\n");
 235         kfree(c);
 236 }
 237
 238 static void pcmcia_release_dev(struct device *dev)
 239 {
 240         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 241         int i;
 242         dev_dbg(dev, "releasing device\n");
 243         pcmcia_put_socket(p_dev->socket);
 244         for (i = 0; i < 4; i++)
 245                 kfree(p_dev->prod_id[i]);
 246         kfree(p_dev->devname);
 247         kref_put(&p_dev->function_config->ref, pcmcia_release_function);
 248         kfree(p_dev);
 249 }
 250
 251
 252 static int pcmcia_device_probe(struct device *dev)
 253 {
 254         struct pcmcia_device *p_dev;
 255         struct pcmcia_driver *p_drv;
 256         struct pcmcia_socket *s;
 257         cistpl_config_t cis_config;
 258         int ret = 0;
 259
 260         dev = get_device(dev);
 261         if (!dev)
 262                 return -ENODEV;
 263
 264         p_dev = to_pcmcia_dev(dev);
 265         p_drv = to_pcmcia_drv(dev->driver);
 266         s = p_dev->socket;
 267
 268         dev_dbg(dev, "trying to bind to %s\n", p_drv->drv.name);
 269
 270         if ((!p_drv->probe) || (!p_dev->function_config) ||
 271             (!try_module_get(p_drv->owner))) {
 272                 ret = -EINVAL;
 273                 goto put_dev;
 274         }
 275
 276         /* set up some more device information */
 277         ret = pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_CONFIG,
 278                                 &cis_config);
 279         if (!ret) {
 280                 p_dev->conf.ConfigBase = cis_config.base;
 281                 p_dev->conf.Present = cis_config.rmask[0];
 282         } else {
 283                 dev_printk(KERN_INFO, dev,
 284                            "pcmcia: could not parse base and rmask0 of CIS\n");
 285                 p_dev->conf.ConfigBase = 0;
 286                 p_dev->conf.Present = 0;
 287         }
 288
 289         ret = p_drv->probe(p_dev);
 290         if (ret) {
 291                 dev_dbg(dev, "binding to %s failed with %d\n",
 292                            p_drv->drv.name, ret);
 293                 goto put_module;
 294         }
 295
 296         mutex_lock(&s->ops_mutex);
 297         if ((s->pcmcia_state.has_pfc) &&
 298             (p_dev->socket->device_count == 1) && (p_dev->device_no == 0))
 299                 pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY);
 300         mutex_unlock(&s->ops_mutex);
 301
 302 put_module:
 303         if (ret)
 304                 module_put(p_drv->owner);
 305 put_dev:
 306         if (ret)
 307                 put_device(dev);
 308         return ret;
 309 }
 310
 311
 312 /*
 313  * Removes a PCMCIA card from the device tree and socket list.
 314  */
 315 static void pcmcia_card_remove(struct pcmcia_socket *s, struct pcmcia_device *leftover)
 316 {
 317         struct pcmcia_device    *p_dev;
 318         struct pcmcia_device    *tmp;
 319
 320         dev_dbg(leftover ? &leftover->dev : &s->dev,
 321                    "pcmcia_card_remove(%d) %s\n", s->sock,
 322                    leftover ? leftover->devname : "");
 323
 324         mutex_lock(&s->ops_mutex);
 325         if (!leftover)
 326                 s->device_count = 0;
 327         else
 328                 s->device_count = 1;
 329         mutex_unlock(&s->ops_mutex);
 330
 331         /* unregister all pcmcia_devices registered with this socket, except leftover */
 332         list_for_each_entry_safe(p_dev, tmp, &s->devices_list, socket_device_list) {
 333                 if (p_dev == leftover)
 334                         continue;
 335
 336                 mutex_lock(&s->ops_mutex);
 337                 list_del(&p_dev->socket_device_list);
 338                 p_dev->_removed = 1;
 339                 mutex_unlock(&s->ops_mutex);
 340
 341                 dev_dbg(&p_dev->dev, "unregistering device\n");
 342                 device_unregister(&p_dev->dev);
 343         }
 344
 345         return;
 346 }
 347
 348 static int pcmcia_device_remove(struct device *dev)
 349 {
 350         struct pcmcia_device *p_dev;
 351         struct pcmcia_driver *p_drv;
 352         int i;
 353
 354         p_dev = to_pcmcia_dev(dev);
 355         p_drv = to_pcmcia_drv(dev->driver);
 356
 357         dev_dbg(dev, "removing device\n");
 358
 359         /* If we're removing the primary module driving a
 360          * pseudo multi-function card, we need to unbind
 361          * all devices
 362          */
 363         if ((p_dev->socket->pcmcia_state.has_pfc) &&
 364             (p_dev->socket->device_count > 0) &&
 365             (p_dev->device_no == 0))
 366                 pcmcia_card_remove(p_dev->socket, p_dev);
 367
 368         /* detach the "instance" */
 369         if (!p_drv)
 370                 return 0;
 371
 372         if (p_drv->remove)
 373                 p_drv->remove(p_dev);
 374
 375         p_dev->dev_node = NULL;
 376
 377         /* check for proper unloading */
 378         if (p_dev->_irq || p_dev->_io || p_dev->_locked)
 379                 dev_printk(KERN_INFO, dev,
 380                         "pcmcia: driver %s did not release config properly\n",
 381                         p_drv->drv.name);
 382
 383         for (i = 0; i < MAX_WIN; i++)
 384                 if (p_dev->_win & CLIENT_WIN_REQ(i))
 385                         dev_printk(KERN_INFO, dev,
 386                           "pcmcia: driver %s did not release window properly\n",
 387                            p_drv->drv.name);
 388
 389         /* references from pcmcia_probe_device */
 390         pcmcia_put_dev(p_dev);
 391         module_put(p_drv->owner);
 392
 393         return 0;
 394 }
 395
 396
 397 /*
 398  * pcmcia_device_query -- determine information about a pcmcia device
 399  */
 400 static int pcmcia_device_query(struct pcmcia_device *p_dev)
 401 {
 402         cistpl_manfid_t manf_id;
 403         cistpl_funcid_t func_id;
 404         cistpl_vers_1_t *vers1;
 405         unsigned int i;
 406
 407         vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL);
 408         if (!vers1)
 409                 return -ENOMEM;
 410
 411         if (!pccard_read_tuple(p_dev->socket, BIND_FN_ALL,
 412                                CISTPL_MANFID, &manf_id)) {
 413                 mutex_lock(&p_dev->socket->ops_mutex);
 414                 p_dev->manf_id = manf_id.manf;
 415                 p_dev->card_id = manf_id.card;
 416                 p_dev->has_manf_id = 1;
 417                 p_dev->has_card_id = 1;
 418                 mutex_unlock(&p_dev->socket->ops_mutex);
 419         }
 420
 421         if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 422                                CISTPL_FUNCID, &func_id)) {
 423                 mutex_lock(&p_dev->socket->ops_mutex);
 424                 p_dev->func_id = func_id.func;
 425                 p_dev->has_func_id = 1;
 426                 mutex_unlock(&p_dev->socket->ops_mutex);
 427         } else {
 428                 /* rule of thumb: cards with no FUNCID, but with
 429                  * common memory device geometry information, are
 430                  * probably memory cards (from pcmcia-cs) */
 431                 cistpl_device_geo_t *devgeo;
 432
 433                 devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL);
 434                 if (!devgeo) {
 435                         kfree(vers1);
 436                         return -ENOMEM;
 437                 }
 438                 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 439                                       CISTPL_DEVICE_GEO, devgeo)) {
 440                         dev_dbg(&p_dev->dev,
 441                                    "mem device geometry probably means "
 442                                    "FUNCID_MEMORY\n");
 443                         mutex_lock(&p_dev->socket->ops_mutex);
 444                         p_dev->func_id = CISTPL_FUNCID_MEMORY;
 445                         p_dev->has_func_id = 1;
 446                         mutex_unlock(&p_dev->socket->ops_mutex);
 447                 }
 448                 kfree(devgeo);
 449         }
 450
 451         if (!pccard_read_tuple(p_dev->socket, BIND_FN_ALL, CISTPL_VERS_1,
 452                                vers1)) {
 453                 mutex_lock(&p_dev->socket->ops_mutex);
 454                 for (i = 0; i < min_t(unsigned int, 4, vers1->ns); i++) {
 455                         char *tmp;
 456                         unsigned int length;
 457                         char *new;
 458
 459                         tmp = vers1->str + vers1->ofs[i];
 460
 461                         length = strlen(tmp) + 1;
 462                         if ((length < 2) || (length > 255))
 463                                 continue;
 464
 465                         new = kmalloc(sizeof(char) * length, GFP_KERNEL);
 466                         if (!new)
 467                                 continue;
 468
 469                         new = strncpy(new, tmp, length);
 470
 471                         tmp = p_dev->prod_id[i];
 472                         p_dev->prod_id[i] = new;
 473                         kfree(tmp);
 474                 }
 475                 mutex_unlock(&p_dev->socket->ops_mutex);
 476         }
 477
 478         kfree(vers1);
 479         return 0;
 480 }
 481
 482
 483 /* device_add_lock is needed to avoid double registration by cardmgr and kernel.
 484  * Serializes pcmcia_device_add; will most likely be removed in future.
 485  *
 486  * While it has the caveat that adding new PCMCIA devices inside(!) device_register()
 487  * won't work, this doesn't matter much at the moment: the driver core doesn't
 488  * support it either.
 489  */
 490 static DEFINE_MUTEX(device_add_lock);
 491
 492 struct pcmcia_device *pcmcia_device_add(struct pcmcia_socket *s, unsigned int function)
 493 {
 494         struct pcmcia_device *p_dev, *tmp_dev;
 495         int i;
 496
 497         s = pcmcia_get_socket(s);
 498         if (!s)
 499                 return NULL;
 500
 501         mutex_lock(&device_add_lock);
 502
 503         pr_debug("adding device to %d, function %d\n", s->sock, function);
 504
 505         p_dev = kzalloc(sizeof(struct pcmcia_device), GFP_KERNEL);
 506         if (!p_dev)
 507                 goto err_put;
 508
 509         mutex_lock(&s->ops_mutex);
 510         p_dev->device_no = (s->device_count++);
 511         mutex_unlock(&s->ops_mutex);
 512
 513         /* max of 2 PFC devices */
 514         if ((p_dev->device_no >= 2) && (function == 0))
 515                 goto err_free;
 516
 517         /* max of 4 devices overall */
 518         if (p_dev->device_no >= 4)
 519                 goto err_free;
 520
 521         p_dev->socket = s;
 522         p_dev->func   = function;
 523
 524         p_dev->dev.bus = &pcmcia_bus_type;
 525         p_dev->dev.parent = s->dev.parent;
 526         p_dev->dev.release = pcmcia_release_dev;
 527         /* by default don't allow DMA */
 528         p_dev->dma_mask = DMA_MASK_NONE;
 529         p_dev->dev.dma_mask = &p_dev->dma_mask;
 530         dev_set_name(&p_dev->dev, "%d.%d", p_dev->socket->sock, p_dev->device_no);
 531         if (!dev_name(&p_dev->dev))
 532                 goto err_free;
 533         p_dev->devname = kasprintf(GFP_KERNEL, "pcmcia%s", dev_name(&p_dev->dev));
 534         if (!p_dev->devname)
 535                 goto err_free;
 536         dev_dbg(&p_dev->dev, "devname is %s\n", p_dev->devname);
 537
 538         mutex_lock(&s->ops_mutex);
 539
 540         /*
 541          * p_dev->function_config must be the same for all card functions.
 542          * Note that this is serialized by the device_add_lock, so that
 543          * only one such struct will be created.
 544          */
 545         list_for_each_entry(tmp_dev, &s->devices_list, socket_device_list)
 546                 if (p_dev->func == tmp_dev->func) {
 547                         p_dev->function_config = tmp_dev->function_config;
 548                         p_dev->io = tmp_dev->io;
 549                         p_dev->irq = tmp_dev->irq;
 550                         kref_get(&p_dev->function_config->ref);
 551                 }
 552
 553         /* Add to the list in pcmcia_bus_socket */
 554         list_add(&p_dev->socket_device_list, &s->devices_list);
 555
 556         mutex_unlock(&s->ops_mutex);
 557
 558         if (!p_dev->function_config) {
 559                 dev_dbg(&p_dev->dev, "creating config_t\n");
 560                 p_dev->function_config = kzalloc(sizeof(struct config_t),
 561                                                  GFP_KERNEL);
 562                 if (!p_dev->function_config)
 563                         goto err_unreg;
 564                 kref_init(&p_dev->function_config->ref);
 565         }
 566
 567         dev_printk(KERN_NOTICE, &p_dev->dev,
 568                    "pcmcia: registering new device %s\n",
 569                    p_dev->devname);
 570
 571         pcmcia_device_query(p_dev);
 572
 573         if (device_register(&p_dev->dev))
 574                 goto err_unreg;
 575
 576         mutex_unlock(&device_add_lock);
 577
 578         return p_dev;
 579
 580  err_unreg:
 581         mutex_lock(&s->ops_mutex);
 582         list_del(&p_dev->socket_device_list);
 583         mutex_unlock(&s->ops_mutex);
 584
 585  err_free:
 586         mutex_lock(&s->ops_mutex);
 587         s->device_count--;
 588         mutex_unlock(&s->ops_mutex);
 589
 590         for (i = 0; i < 4; i++)
 591                 kfree(p_dev->prod_id[i]);
 592         kfree(p_dev->devname);
 593         kfree(p_dev);
 594  err_put:
 595         mutex_unlock(&device_add_lock);
 596         pcmcia_put_socket(s);
 597
 598         return NULL;
 599 }
 600
 601
 602 static int pcmcia_card_add(struct pcmcia_socket *s)
 603 {
 604         cistpl_longlink_mfc_t mfc;
 605         unsigned int no_funcs, i, no_chains;
 606         int ret = -EAGAIN;
 607
 608         mutex_lock(&s->ops_mutex);
 609         if (!(s->resource_setup_done)) {
 610                 dev_dbg(&s->dev,
 611                            "no resources available, delaying card_add\n");
 612                 mutex_unlock(&s->ops_mutex);
 613                 return -EAGAIN; /* try again, but later... */
 614         }
 615
 616         if (pcmcia_validate_mem(s)) {
 617                 dev_dbg(&s->dev, "validating mem resources failed, "
 618                        "delaying card_add\n");
 619                 mutex_unlock(&s->ops_mutex);
 620                 return -EAGAIN; /* try again, but later... */
 621         }
 622         mutex_unlock(&s->ops_mutex);
 623
 624         ret = pccard_validate_cis(s, &no_chains);
 625         if (ret || !no_chains) {
 626                 dev_dbg(&s->dev, "invalid CIS or invalid resources\n");
 627                 return -ENODEV;
 628         }
 629
 630         if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
 631                 no_funcs = mfc.nfn;
 632         else
 633                 no_funcs = 1;
 634         s->functions = no_funcs;
 635
 636         for (i = 0; i < no_funcs; i++)
 637                 pcmcia_device_add(s, i);
 638
 639         return ret;
 640 }
 641
 642
 643 static int pcmcia_requery_callback(struct device *dev, void * _data)
 644 {
 645         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 646         if (!p_dev->dev.driver) {
 647                 dev_dbg(dev, "update device information\n");
 648                 pcmcia_device_query(p_dev);
 649         }
 650
 651         return 0;
 652 }
 653
 654
 655 static void pcmcia_requery(struct pcmcia_socket *s)
 656 {
 657         int present, has_pfc;
 658
 659         mutex_lock(&s->ops_mutex);
 660         present = s->pcmcia_state.present;
 661         mutex_unlock(&s->ops_mutex);
 662
 663         if (!present)
 664                 return;
 665
 666         if (s->functions == 0) {
 667                 pcmcia_card_add(s);
 668                 return;
 669         }
 670
 671         /* some device information might have changed because of a CIS
 672          * update or because we can finally read it correctly... so
 673          * determine it again, overwriting old values if necessary. */
 674         bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery_callback);
 675
 676         /* if the CIS changed, we need to check whether the number of
 677          * functions changed. */
 678         if (s->fake_cis) {
 679                 int old_funcs, new_funcs;
 680                 cistpl_longlink_mfc_t mfc;
 681
 682                 /* does this cis override add or remove functions? */
 683                 old_funcs = s->functions;
 684
 685                 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC,
 686                                         &mfc))
 687                         new_funcs = mfc.nfn;
 688                 else
 689                         new_funcs = 1;
 690                 if (old_funcs != new_funcs) {
 691                         /* we need to re-start */
 692                         pcmcia_card_remove(s, NULL);
 693                         pcmcia_card_add(s);
 694                 }
 695         }
 696
 697         /* If the PCMCIA device consists of two pseudo devices,
 698          * call pcmcia_device_add() -- which will fail if both
 699          * devices are already registered. */
 700         mutex_lock(&s->ops_mutex);
 701         has_pfc = s->pcmcia_state.has_pfc;
 702         mutex_unlock(&s->ops_mutex);
 703         if (has_pfc)
 704                 pcmcia_device_add(s, 0);
 705
 706         /* we re-scan all devices, not just the ones connected to this
 707          * socket. This does not matter, though. */
 708         if (bus_rescan_devices(&pcmcia_bus_type))
 709                 dev_warn(&s->dev, "rescanning the bus failed\n");
 710 }
 711
 712
 713 #ifdef CONFIG_PCMCIA_LOAD_CIS
 714
 715 /**
 716  * pcmcia_load_firmware - load CIS from userspace if device-provided is broken
 717  * @dev: the pcmcia device which needs a CIS override
 718  * @filename: requested filename in /lib/firmware/
 719  *
 720  * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if
 721  * the one provided by the card is broken. The firmware files reside in
 722  * /lib/firmware/ in userspace.
 723  */
 724 static int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
 725 {
 726         struct pcmcia_socket *s = dev->socket;
 727         const struct firmware *fw;
 728         int ret = -ENOMEM;
 729         cistpl_longlink_mfc_t mfc;
 730         int old_funcs, new_funcs = 1;
 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                 /* we need to re-start if the number of functions changed */
 754                 old_funcs = s->functions;
 755                 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC,
 756                                         &mfc))
 757                         new_funcs = mfc.nfn;
 758
 759                 if (old_funcs != new_funcs)
 760                         ret = -EBUSY;
 761
 762                 /* update information */
 763                 pcmcia_device_query(dev);
 764
 765                 /* requery (as number of functions might have changed) */
 766                 pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY);
 767         }
 768  release:
 769         release_firmware(fw);
 770
 771         return ret;
 772 }
 773
 774 #else /* !CONFIG_PCMCIA_LOAD_CIS */
 775
 776 static inline int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
 777 {
 778         return -ENODEV;
 779 }
 780
 781 #endif
 782
 783
 784 static inline int pcmcia_devmatch(struct pcmcia_device *dev,
 785                                   struct pcmcia_device_id *did)
 786 {
 787         if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
 788                 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
 789                         return 0;
 790         }
 791
 792         if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
 793                 if ((!dev->has_card_id) || (dev->card_id != did->card_id))
 794                         return 0;
 795         }
 796
 797         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
 798                 if (dev->func != did->function)
 799                         return 0;
 800         }
 801
 802         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
 803                 if (!dev->prod_id[0])
 804                         return 0;
 805                 if (strcmp(did->prod_id[0], dev->prod_id[0]))
 806                         return 0;
 807         }
 808
 809         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
 810                 if (!dev->prod_id[1])
 811                         return 0;
 812                 if (strcmp(did->prod_id[1], dev->prod_id[1]))
 813                         return 0;
 814         }
 815
 816         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
 817                 if (!dev->prod_id[2])
 818                         return 0;
 819                 if (strcmp(did->prod_id[2], dev->prod_id[2]))
 820                         return 0;
 821         }
 822
 823         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
 824                 if (!dev->prod_id[3])
 825                         return 0;
 826                 if (strcmp(did->prod_id[3], dev->prod_id[3]))
 827                         return 0;
 828         }
 829
 830         if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
 831                 if (dev->device_no != did->device_no)
 832                         return 0;
 833                 mutex_lock(&dev->socket->ops_mutex);
 834                 dev->socket->pcmcia_state.has_pfc = 1;
 835                 mutex_unlock(&dev->socket->ops_mutex);
 836         }
 837
 838         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
 839                 int ret;
 840
 841                 if ((!dev->has_func_id) || (dev->func_id != did->func_id))
 842                         return 0;
 843
 844                 /* if this is a pseudo-multi-function device,
 845                  * we need explicit matches */
 846                 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO)
 847                         return 0;
 848                 if (dev->device_no)
 849                         return 0;
 850
 851                 /* also, FUNC_ID matching needs to be activated by userspace
 852                  * after it has re-checked that there is no possible module
 853                  * with a prod_id/manf_id/card_id match.
 854                  */
 855                 mutex_lock(&dev->socket->ops_mutex);
 856                 ret = dev->allow_func_id_match;
 857                 mutex_unlock(&dev->socket->ops_mutex);
 858
 859                 if (!ret) {
 860                         dev_dbg(&dev->dev,
 861                                 "skipping FUNC_ID match until userspace ACK\n");
 862                         return 0;
 863                 }
 864         }
 865
 866         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
 867                 dev_dbg(&dev->dev, "device needs a fake CIS\n");
 868                 if (!dev->socket->fake_cis)
 869                         if (pcmcia_load_firmware(dev, did->cisfile))
 870                                 return 0;
 871         }
 872
 873         if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
 874                 int i;
 875                 for (i = 0; i < 4; i++)
 876                         if (dev->prod_id[i])
 877                                 return 0;
 878                 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
 879                         return 0;
 880         }
 881
 882         return 1;
 883 }
 884
 885
 886 static int pcmcia_bus_match(struct device *dev, struct device_driver *drv)
 887 {
 888         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 889         struct pcmcia_driver *p_drv = to_pcmcia_drv(drv);
 890         struct pcmcia_device_id *did = p_drv->id_table;
 891         struct pcmcia_dynid *dynid;
 892
 893         /* match dynamic devices first */
 894         mutex_lock(&p_drv->dynids.lock);
 895         list_for_each_entry(dynid, &p_drv->dynids.list, node) {
 896                 dev_dbg(dev, "trying to match to %s\n", drv->name);
 897                 if (pcmcia_devmatch(p_dev, &dynid->id)) {
 898                         dev_dbg(dev, "matched to %s\n", drv->name);
 899                         mutex_unlock(&p_drv->dynids.lock);
 900                         return 1;
 901                 }
 902         }
 903         mutex_unlock(&p_drv->dynids.lock);
 904
 905 #ifdef CONFIG_PCMCIA_IOCTL
 906         /* matching by cardmgr */
 907         if (p_dev->cardmgr == p_drv) {
 908                 dev_dbg(dev, "cardmgr matched to %s\n", drv->name);
 909                 return 1;
 910         }
 911 #endif
 912
 913         while (did && did->match_flags) {
 914                 dev_dbg(dev, "trying to match to %s\n", drv->name);
 915                 if (pcmcia_devmatch(p_dev, did)) {
 916                         dev_dbg(dev, "matched to %s\n", drv->name);
 917                         return 1;
 918                 }
 919                 did++;
 920         }
 921
 922         return 0;
 923 }
 924
 925 #ifdef CONFIG_HOTPLUG
 926
 927 static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
 928 {
 929         struct pcmcia_device *p_dev;
 930         int i;
 931         u32 hash[4] = { 0, 0, 0, 0};
 932
 933         if (!dev)
 934                 return -ENODEV;
 935
 936         p_dev = to_pcmcia_dev(dev);
 937
 938         /* calculate hashes */
 939         for (i = 0; i < 4; i++) {
 940                 if (!p_dev->prod_id[i])
 941                         continue;
 942                 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
 943         }
 944
 945         if (add_uevent_var(env, "SOCKET_NO=%u", p_dev->socket->sock))
 946                 return -ENOMEM;
 947
 948         if (add_uevent_var(env, "DEVICE_NO=%02X", p_dev->device_no))
 949                 return -ENOMEM;
 950
 951         if (add_uevent_var(env, "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
 952                            "pa%08Xpb%08Xpc%08Xpd%08X",
 953                            p_dev->has_manf_id ? p_dev->manf_id : 0,
 954                            p_dev->has_card_id ? p_dev->card_id : 0,
 955                            p_dev->has_func_id ? p_dev->func_id : 0,
 956                            p_dev->func,
 957                            p_dev->device_no,
 958                            hash[0],
 959                            hash[1],
 960                            hash[2],
 961                            hash[3]))
 962                 return -ENOMEM;
 963
 964         return 0;
 965 }
 966
 967 #else
 968
 969 static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
 970 {
 971         return -ENODEV;
 972 }
 973
 974 #endif
 975
 976 /************************ runtime PM support ***************************/
 977
 978 static int pcmcia_dev_suspend(struct device *dev, pm_message_t state);
 979 static int pcmcia_dev_resume(struct device *dev);
 980
 981 static int runtime_suspend(struct device *dev)
 982 {
 983         int rc;
 984
 985         device_lock(dev);
 986         rc = pcmcia_dev_suspend(dev, PMSG_SUSPEND);
 987         device_unlock(dev);
 988         return rc;
 989 }
 990
 991 static int runtime_resume(struct device *dev)
 992 {
 993         int rc;
 994
 995         device_lock(dev);
 996         rc = pcmcia_dev_resume(dev);
 997         device_unlock(dev);
 998         return rc;
 999 }
1000
1001 /************************ per-device sysfs output ***************************/
1002
1003 #define pcmcia_device_attr(field, test, format)                         \
1004 static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf)              \
1005 {                                                                       \
1006         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);               \
1007         return p_dev->test ? sprintf(buf, format, p_dev->field) : -ENODEV; \
1008 }
1009
1010 #define pcmcia_device_stringattr(name, field)                                   \
1011 static ssize_t name##_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->field ? sprintf(buf, "%s\n", p_dev->field) : -ENODEV; \
1015 }
1016
1017 pcmcia_device_attr(func, socket, "0x%02x\n");
1018 pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
1019 pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
1020 pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
1021 pcmcia_device_stringattr(prod_id1, prod_id[0]);
1022 pcmcia_device_stringattr(prod_id2, prod_id[1]);
1023 pcmcia_device_stringattr(prod_id3, prod_id[2]);
1024 pcmcia_device_stringattr(prod_id4, prod_id[3]);
1025
1026
1027 static ssize_t pcmcia_show_pm_state(struct device *dev, struct device_attribute *attr, char *buf)
1028 {
1029         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1030
1031         if (p_dev->suspended)
1032                 return sprintf(buf, "off\n");
1033         else
1034                 return sprintf(buf, "on\n");
1035 }
1036
1037 static ssize_t pcmcia_store_pm_state(struct device *dev, struct device_attribute *attr,
1038                                      const char *buf, size_t count)
1039 {
1040         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1041         int ret = 0;
1042
1043         if (!count)
1044                 return -EINVAL;
1045
1046         if ((!p_dev->suspended) && !strncmp(buf, "off", 3))
1047                 ret = runtime_suspend(dev);
1048         else if (p_dev->suspended && !strncmp(buf, "on", 2))
1049                 ret = runtime_resume(dev);
1050
1051         return ret ? ret : count;
1052 }
1053
1054
1055 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1056 {
1057         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1058         int i;
1059         u32 hash[4] = { 0, 0, 0, 0};
1060
1061         /* calculate hashes */
1062         for (i = 0; i < 4; i++) {
1063                 if (!p_dev->prod_id[i])
1064                         continue;
1065                 hash[i] = crc32(0, p_dev->prod_id[i],
1066                                 strlen(p_dev->prod_id[i]));
1067         }
1068         return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
1069                                 "pa%08Xpb%08Xpc%08Xpd%08X\n",
1070                                 p_dev->has_manf_id ? p_dev->manf_id : 0,
1071                                 p_dev->has_card_id ? p_dev->card_id : 0,
1072                                 p_dev->has_func_id ? p_dev->func_id : 0,
1073                                 p_dev->func, p_dev->device_no,
1074                                 hash[0], hash[1], hash[2], hash[3]);
1075 }
1076
1077 static ssize_t pcmcia_store_allow_func_id_match(struct device *dev,
1078                 struct device_attribute *attr, const char *buf, size_t count)
1079 {
1080         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1081
1082         if (!count)
1083                 return -EINVAL;
1084
1085         mutex_lock(&p_dev->socket->ops_mutex);
1086         p_dev->allow_func_id_match = 1;
1087         mutex_unlock(&p_dev->socket->ops_mutex);
1088         pcmcia_parse_uevents(p_dev->socket, PCMCIA_UEVENT_REQUERY);
1089
1090         return count;
1091 }
1092
1093 static struct device_attribute pcmcia_dev_attrs[] = {
1094         __ATTR(function, 0444, func_show, NULL),
1095         __ATTR(pm_state, 0644, pcmcia_show_pm_state, pcmcia_store_pm_state),
1096         __ATTR_RO(func_id),
1097         __ATTR_RO(manf_id),
1098         __ATTR_RO(card_id),
1099         __ATTR_RO(prod_id1),
1100         __ATTR_RO(prod_id2),
1101         __ATTR_RO(prod_id3),
1102         __ATTR_RO(prod_id4),
1103         __ATTR_RO(modalias),
1104         __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match),
1105         __ATTR_NULL,
1106 };
1107
1108 /* PM support, also needed for reset */
1109
1110 static int pcmcia_dev_suspend(struct device *dev, pm_message_t state)
1111 {
1112         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1113         struct pcmcia_driver *p_drv = NULL;
1114         int ret = 0;
1115
1116         mutex_lock(&p_dev->socket->ops_mutex);
1117         if (p_dev->suspended) {
1118                 mutex_unlock(&p_dev->socket->ops_mutex);
1119                 return 0;
1120         }
1121         p_dev->suspended = 1;
1122         mutex_unlock(&p_dev->socket->ops_mutex);
1123
1124         dev_dbg(dev, "suspending\n");
1125
1126         if (dev->driver)
1127                 p_drv = to_pcmcia_drv(dev->driver);
1128
1129         if (!p_drv)
1130                 goto out;
1131
1132         if (p_drv->suspend) {
1133                 ret = p_drv->suspend(p_dev);
1134                 if (ret) {
1135                         dev_printk(KERN_ERR, dev,
1136                                    "pcmcia: device %s (driver %s) did "
1137                                    "not want to go to sleep (%d)\n",
1138                                    p_dev->devname, p_drv->drv.name, ret);
1139                         mutex_lock(&p_dev->socket->ops_mutex);
1140                         p_dev->suspended = 0;
1141                         mutex_unlock(&p_dev->socket->ops_mutex);
1142                         goto out;
1143                 }
1144         }
1145
1146         if (p_dev->device_no == p_dev->func) {
1147                 dev_dbg(dev, "releasing configuration\n");
1148                 pcmcia_release_configuration(p_dev);
1149         }
1150
1151  out:
1152         return ret;
1153 }
1154
1155
1156 static int pcmcia_dev_resume(struct device *dev)
1157 {
1158         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1159         struct pcmcia_driver *p_drv = NULL;
1160         int ret = 0;
1161
1162         mutex_lock(&p_dev->socket->ops_mutex);
1163         if (!p_dev->suspended) {
1164                 mutex_unlock(&p_dev->socket->ops_mutex);
1165                 return 0;
1166         }
1167         p_dev->suspended = 0;
1168         mutex_unlock(&p_dev->socket->ops_mutex);
1169
1170         dev_dbg(dev, "resuming\n");
1171
1172         if (dev->driver)
1173                 p_drv = to_pcmcia_drv(dev->driver);
1174
1175         if (!p_drv)
1176                 goto out;
1177
1178         if (p_dev->device_no == p_dev->func) {
1179                 dev_dbg(dev, "requesting configuration\n");
1180                 ret = pcmcia_request_configuration(p_dev, &p_dev->conf);
1181                 if (ret)
1182                         goto out;
1183         }
1184
1185         if (p_drv->resume)
1186                 ret = p_drv->resume(p_dev);
1187
1188  out:
1189         return ret;
1190 }
1191
1192
1193 static int pcmcia_bus_suspend_callback(struct device *dev, void * _data)
1194 {
1195         struct pcmcia_socket *skt = _data;
1196         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1197
1198         if (p_dev->socket != skt || p_dev->suspended)
1199                 return 0;
1200
1201         return runtime_suspend(dev);
1202 }
1203
1204 static int pcmcia_bus_resume_callback(struct device *dev, void * _data)
1205 {
1206         struct pcmcia_socket *skt = _data;
1207         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1208
1209         if (p_dev->socket != skt || !p_dev->suspended)
1210                 return 0;
1211
1212         runtime_resume(dev);
1213
1214         return 0;
1215 }
1216
1217 static int pcmcia_bus_resume(struct pcmcia_socket *skt)
1218 {
1219         dev_dbg(&skt->dev, "resuming socket %d\n", skt->sock);
1220         bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback);
1221         return 0;
1222 }
1223
1224 static int pcmcia_bus_suspend(struct pcmcia_socket *skt)
1225 {
1226         dev_dbg(&skt->dev, "suspending socket %d\n", skt->sock);
1227         if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt,
1228                              pcmcia_bus_suspend_callback)) {
1229                 pcmcia_bus_resume(skt);
1230                 return -EIO;
1231         }
1232         return 0;
1233 }
1234
1235
1236 /*======================================================================
1237
1238     The card status event handler.
1239
1240 ======================================================================*/
1241
1242 /* Normally, the event is passed to individual drivers after
1243  * informing userspace. Only for CS_EVENT_CARD_REMOVAL this
1244  * is inversed to maintain historic compatibility.
1245  */
1246
1247 static int ds_event(struct pcmcia_socket *skt, event_t event, int priority)
1248 {
1249         struct pcmcia_socket *s = pcmcia_get_socket(skt);
1250
1251         if (!s) {
1252                 dev_printk(KERN_ERR, &skt->dev,
1253                            "PCMCIA obtaining reference to socket "      \
1254                            "failed, event 0x%x lost!\n", event);
1255                 return -ENODEV;
1256         }
1257
1258         dev_dbg(&skt->dev, "ds_event(0x%06x, %d, 0x%p)\n",
1259                    event, priority, skt);
1260
1261         switch (event) {
1262         case CS_EVENT_CARD_REMOVAL:
1263                 mutex_lock(&s->ops_mutex);
1264                 s->pcmcia_state.present = 0;
1265                 mutex_unlock(&s->ops_mutex);
1266                 pcmcia_card_remove(skt, NULL);
1267                 handle_event(skt, event);
1268                 mutex_lock(&s->ops_mutex);
1269                 destroy_cis_cache(s);
1270                 mutex_unlock(&s->ops_mutex);
1271                 break;
1272
1273         case CS_EVENT_CARD_INSERTION:
1274                 mutex_lock(&s->ops_mutex);
1275                 s->pcmcia_state.has_pfc = 0;
1276                 s->pcmcia_state.present = 1;
1277                 destroy_cis_cache(s); /* to be on the safe side... */
1278                 mutex_unlock(&s->ops_mutex);
1279                 pcmcia_card_add(skt);
1280                 handle_event(skt, event);
1281                 break;
1282
1283         case CS_EVENT_EJECTION_REQUEST:
1284                 break;
1285
1286         case CS_EVENT_PM_RESUME:
1287                 if (verify_cis_cache(skt) != 0) {
1288                         dev_dbg(&skt->dev, "cis mismatch - different card\n");
1289                         /* first, remove the card */
1290                         ds_event(skt, CS_EVENT_CARD_REMOVAL, CS_EVENT_PRI_HIGH);
1291                         mutex_lock(&s->ops_mutex);
1292                         destroy_cis_cache(skt);
1293                         kfree(skt->fake_cis);
1294                         skt->fake_cis = NULL;
1295                         mutex_unlock(&s->ops_mutex);
1296                         /* now, add the new card */
1297                         ds_event(skt, CS_EVENT_CARD_INSERTION,
1298                                  CS_EVENT_PRI_LOW);
1299                 }
1300                 handle_event(skt, event);
1301                 break;
1302
1303         case CS_EVENT_PM_SUSPEND:
1304         case CS_EVENT_RESET_PHYSICAL:
1305         case CS_EVENT_CARD_RESET:
1306         default:
1307                 handle_event(skt, event);
1308                 break;
1309     }
1310
1311     pcmcia_put_socket(s);
1312
1313     return 0;
1314 } /* ds_event */
1315
1316
1317 struct pcmcia_device *pcmcia_dev_present(struct pcmcia_device *_p_dev)
1318 {
1319         struct pcmcia_device *p_dev;
1320         struct pcmcia_device *ret = NULL;
1321
1322         p_dev = pcmcia_get_dev(_p_dev);
1323         if (!p_dev)
1324                 return NULL;
1325
1326         mutex_lock(&p_dev->socket->ops_mutex);
1327         if (!p_dev->socket->pcmcia_state.present)
1328                 goto out;
1329
1330         if (p_dev->socket->pcmcia_state.dead)
1331                 goto out;
1332
1333         if (p_dev->_removed)
1334                 goto out;
1335
1336         if (p_dev->suspended)
1337                 goto out;
1338
1339         ret = p_dev;
1340  out:
1341         mutex_unlock(&p_dev->socket->ops_mutex);
1342         pcmcia_put_dev(p_dev);
1343         return ret;
1344 }
1345 EXPORT_SYMBOL(pcmcia_dev_present);
1346
1347
1348 static struct pcmcia_callback pcmcia_bus_callback = {
1349         .owner = THIS_MODULE,
1350         .event = ds_event,
1351         .requery = pcmcia_requery,
1352         .validate = pccard_validate_cis,
1353         .suspend = pcmcia_bus_suspend,
1354         .resume = pcmcia_bus_resume,
1355 };
1356
1357 static int __devinit pcmcia_bus_add_socket(struct device *dev,
1358                                            struct class_interface *class_intf)
1359 {
1360         struct pcmcia_socket *socket = dev_get_drvdata(dev);
1361         int ret;
1362
1363         socket = pcmcia_get_socket(socket);
1364         if (!socket) {
1365                 dev_printk(KERN_ERR, dev,
1366                            "PCMCIA obtaining reference to socket failed\n");
1367                 return -ENODEV;
1368         }
1369
1370         ret = sysfs_create_bin_file(&dev->kobj, &pccard_cis_attr);
1371         if (ret) {
1372                 dev_printk(KERN_ERR, dev, "PCMCIA registration failed\n");
1373                 pcmcia_put_socket(socket);
1374                 return ret;
1375         }
1376
1377 #ifdef CONFIG_PCMCIA_IOCTL
1378         init_waitqueue_head(&socket->queue);
1379 #endif
1380         INIT_LIST_HEAD(&socket->devices_list);
1381         memset(&socket->pcmcia_state, 0, sizeof(u8));
1382         socket->device_count = 0;
1383
1384         ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback);
1385         if (ret) {
1386                 dev_printk(KERN_ERR, dev, "PCMCIA registration failed\n");
1387                 pcmcia_put_socket(socket);
1388                 return ret;
1389         }
1390
1391         return 0;
1392 }
1393
1394 static void pcmcia_bus_remove_socket(struct device *dev,
1395                                      struct class_interface *class_intf)
1396 {
1397         struct pcmcia_socket *socket = dev_get_drvdata(dev);
1398
1399         if (!socket)
1400                 return;
1401
1402         mutex_lock(&socket->ops_mutex);
1403         socket->pcmcia_state.dead = 1;
1404         mutex_unlock(&socket->ops_mutex);
1405
1406         pccard_register_pcmcia(socket, NULL);
1407
1408         /* unregister any unbound devices */
1409         mutex_lock(&socket->skt_mutex);
1410         pcmcia_card_remove(socket, NULL);
1411         release_cis_mem(socket);
1412         mutex_unlock(&socket->skt_mutex);
1413
1414         sysfs_remove_bin_file(&dev->kobj, &pccard_cis_attr);
1415
1416         pcmcia_put_socket(socket);
1417
1418         return;
1419 }
1420
1421
1422 /* the pcmcia_bus_interface is used to handle pcmcia socket devices */
1423 static struct class_interface pcmcia_bus_interface __refdata = {
1424         .class = &pcmcia_socket_class,
1425         .add_dev = &pcmcia_bus_add_socket,
1426         .remove_dev = &pcmcia_bus_remove_socket,
1427 };
1428
1429
1430 struct bus_type pcmcia_bus_type = {
1431         .name = "pcmcia",
1432         .uevent = pcmcia_bus_uevent,
1433         .match = pcmcia_bus_match,
1434         .dev_attrs = pcmcia_dev_attrs,
1435         .probe = pcmcia_device_probe,
1436         .remove = pcmcia_device_remove,
1437         .suspend = pcmcia_dev_suspend,
1438         .resume = pcmcia_dev_resume,
1439 };
1440
1441
1442 static int __init init_pcmcia_bus(void)
1443 {
1444         int ret;
1445
1446         ret = bus_register(&pcmcia_bus_type);
1447         if (ret < 0) {
1448                 printk(KERN_WARNING "pcmcia: bus_register error: %d\n", ret);
1449                 return ret;
1450         }
1451         ret = class_interface_register(&pcmcia_bus_interface);
1452         if (ret < 0) {
1453                 printk(KERN_WARNING
1454                         "pcmcia: class_interface_register error: %d\n", ret);
1455                 bus_unregister(&pcmcia_bus_type);
1456                 return ret;
1457         }
1458
1459         pcmcia_setup_ioctl();
1460
1461         return 0;
1462 }
1463 fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that
1464                                * pcmcia_socket_class is already registered */
1465
1466
1467 static void __exit exit_pcmcia_bus(void)
1468 {
1469         pcmcia_cleanup_ioctl();
1470
1471         class_interface_unregister(&pcmcia_bus_interface);
1472
1473         bus_unregister(&pcmcia_bus_type);
1474 }
1475 module_exit(exit_pcmcia_bus);
1476
1477
1478 MODULE_ALIAS("ds");