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