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  * <[email protected]>.  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 - 2005      Dominik Brodowski
  14  */
  15
  16 #include <linux/config.h>
  17 #include <linux/kernel.h>
  18 #include <linux/module.h>
  19 #include <linux/init.h>
  20 #include <linux/errno.h>
  21 #include <linux/list.h>
  22 #include <linux/delay.h>
  23 #include <linux/workqueue.h>
  24 #include <linux/crc32.h>
  25 #include <linux/firmware.h>
  26
  27 #define IN_CARD_SERVICES
  28 #include <pcmcia/cs_types.h>
  29 #include <pcmcia/cs.h>
  30 #include <pcmcia/cistpl.h>
  31 #include <pcmcia/ds.h>
  32 #include <pcmcia/ss.h>
  33
  34 #include "cs_internal.h"
  35 #include "ds_internal.h"
  36
  37 /*====================================================================*/
  38
  39 /* Module parameters */
  40
  41 MODULE_AUTHOR("David Hinds <[email protected]>");
  42 MODULE_DESCRIPTION("PCMCIA Driver Services");
  43 MODULE_LICENSE("GPL");
  44
  45 #ifdef DEBUG
  46 int ds_pc_debug;
  47
  48 module_param_named(pc_debug, ds_pc_debug, int, 0644);
  49
  50 #define ds_dbg(lvl, fmt, arg...) do {                           \
  51         if (ds_pc_debug > (lvl))                                        \
  52                 printk(KERN_DEBUG "ds: " fmt , ## arg);         \
  53 } while (0)
  54 #else
  55 #define ds_dbg(lvl, fmt, arg...) do { } while (0)
  56 #endif
  57
  58 spinlock_t pcmcia_dev_list_lock;
  59
  60 /*====================================================================*/
  61
  62 /* code which was in cs.c before */
  63
  64 /* String tables for error messages */
  65
  66 typedef struct lookup_t {
  67     int key;
  68     char *msg;
  69 } lookup_t;
  70
  71 static const lookup_t error_table[] = {
  72     { CS_SUCCESS,               "Operation succeeded" },
  73     { CS_BAD_ADAPTER,           "Bad adapter" },
  74     { CS_BAD_ATTRIBUTE,         "Bad attribute", },
  75     { CS_BAD_BASE,              "Bad base address" },
  76     { CS_BAD_EDC,               "Bad EDC" },
  77     { CS_BAD_IRQ,               "Bad IRQ" },
  78     { CS_BAD_OFFSET,            "Bad offset" },
  79     { CS_BAD_PAGE,              "Bad page number" },
  80     { CS_READ_FAILURE,          "Read failure" },
  81     { CS_BAD_SIZE,              "Bad size" },
  82     { CS_BAD_SOCKET,            "Bad socket" },
  83     { CS_BAD_TYPE,              "Bad type" },
  84     { CS_BAD_VCC,               "Bad Vcc" },
  85     { CS_BAD_VPP,               "Bad Vpp" },
  86     { CS_BAD_WINDOW,            "Bad window" },
  87     { CS_WRITE_FAILURE,         "Write failure" },
  88     { CS_NO_CARD,               "No card present" },
  89     { CS_UNSUPPORTED_FUNCTION,  "Usupported function" },
  90     { CS_UNSUPPORTED_MODE,      "Unsupported mode" },
  91     { CS_BAD_SPEED,             "Bad speed" },
  92     { CS_BUSY,                  "Resource busy" },
  93     { CS_GENERAL_FAILURE,       "General failure" },
  94     { CS_WRITE_PROTECTED,       "Write protected" },
  95     { CS_BAD_ARG_LENGTH,        "Bad argument length" },
  96     { CS_BAD_ARGS,              "Bad arguments" },
  97     { CS_CONFIGURATION_LOCKED,  "Configuration locked" },
  98     { CS_IN_USE,                "Resource in use" },
  99     { CS_NO_MORE_ITEMS,         "No more items" },
 100     { CS_OUT_OF_RESOURCE,       "Out of resource" },
 101     { CS_BAD_HANDLE,            "Bad handle" },
 102     { CS_BAD_TUPLE,             "Bad CIS tuple" }
 103 };
 104
 105
 106 static const lookup_t service_table[] = {
 107     { AccessConfigurationRegister,      "AccessConfigurationRegister" },
 108     { AddSocketServices,                "AddSocketServices" },
 109     { AdjustResourceInfo,               "AdjustResourceInfo" },
 110     { CheckEraseQueue,                  "CheckEraseQueue" },
 111     { CloseMemory,                      "CloseMemory" },
 112     { DeregisterClient,                 "DeregisterClient" },
 113     { DeregisterEraseQueue,             "DeregisterEraseQueue" },
 114     { GetCardServicesInfo,              "GetCardServicesInfo" },
 115     { GetClientInfo,                    "GetClientInfo" },
 116     { GetConfigurationInfo,             "GetConfigurationInfo" },
 117     { GetEventMask,                     "GetEventMask" },
 118     { GetFirstClient,                   "GetFirstClient" },
 119     { GetFirstRegion,                   "GetFirstRegion" },
 120     { GetFirstTuple,                    "GetFirstTuple" },
 121     { GetNextClient,                    "GetNextClient" },
 122     { GetNextRegion,                    "GetNextRegion" },
 123     { GetNextTuple,                     "GetNextTuple" },
 124     { GetStatus,                        "GetStatus" },
 125     { GetTupleData,                     "GetTupleData" },
 126     { MapMemPage,                       "MapMemPage" },
 127     { ModifyConfiguration,              "ModifyConfiguration" },
 128     { ModifyWindow,                     "ModifyWindow" },
 129     { OpenMemory,                       "OpenMemory" },
 130     { ParseTuple,                       "ParseTuple" },
 131     { ReadMemory,                       "ReadMemory" },
 132     { RegisterClient,                   "RegisterClient" },
 133     { RegisterEraseQueue,               "RegisterEraseQueue" },
 134     { RegisterMTD,                      "RegisterMTD" },
 135     { ReleaseConfiguration,             "ReleaseConfiguration" },
 136     { ReleaseIO,                        "ReleaseIO" },
 137     { ReleaseIRQ,                       "ReleaseIRQ" },
 138     { ReleaseWindow,                    "ReleaseWindow" },
 139     { RequestConfiguration,             "RequestConfiguration" },
 140     { RequestIO,                        "RequestIO" },
 141     { RequestIRQ,                       "RequestIRQ" },
 142     { RequestSocketMask,                "RequestSocketMask" },
 143     { RequestWindow,                    "RequestWindow" },
 144     { ResetCard,                        "ResetCard" },
 145     { SetEventMask,                     "SetEventMask" },
 146     { ValidateCIS,                      "ValidateCIS" },
 147     { WriteMemory,                      "WriteMemory" },
 148     { BindDevice,                       "BindDevice" },
 149     { BindMTD,                          "BindMTD" },
 150     { ReportError,                      "ReportError" },
 151     { SuspendCard,                      "SuspendCard" },
 152     { ResumeCard,                       "ResumeCard" },
 153     { EjectCard,                        "EjectCard" },
 154     { InsertCard,                       "InsertCard" },
 155     { ReplaceCIS,                       "ReplaceCIS" }
 156 };
 157
 158
 159 static int pcmcia_report_error(struct pcmcia_device *p_dev, error_info_t *err)
 160 {
 161         int i;
 162         char *serv;
 163
 164         if (!p_dev)
 165                 printk(KERN_NOTICE);
 166         else
 167                 printk(KERN_NOTICE "%s: ", p_dev->dev.bus_id);
 168
 169         for (i = 0; i < ARRAY_SIZE(service_table); i++)
 170                 if (service_table[i].key == err->func)
 171                         break;
 172         if (i < ARRAY_SIZE(service_table))
 173                 serv = service_table[i].msg;
 174         else
 175                 serv = "Unknown service number";
 176
 177         for (i = 0; i < ARRAY_SIZE(error_table); i++)
 178                 if (error_table[i].key == err->retcode)
 179                         break;
 180         if (i < ARRAY_SIZE(error_table))
 181                 printk("%s: %s\n", serv, error_table[i].msg);
 182         else
 183                 printk("%s: Unknown error code %#x\n", serv, err->retcode);
 184
 185         return CS_SUCCESS;
 186 } /* report_error */
 187
 188 /* end of code which was in cs.c before */
 189
 190 /*======================================================================*/
 191
 192 void cs_error(struct pcmcia_device *p_dev, int func, int ret)
 193 {
 194         error_info_t err = { func, ret };
 195         pcmcia_report_error(p_dev, &err);
 196 }
 197 EXPORT_SYMBOL(cs_error);
 198
 199
 200 static void pcmcia_check_driver(struct pcmcia_driver *p_drv)
 201 {
 202         struct pcmcia_device_id *did = p_drv->id_table;
 203         unsigned int i;
 204         u32 hash;
 205
 206         if (!p_drv->attach || !p_drv->event || !p_drv->remove)
 207                 printk(KERN_DEBUG "pcmcia: %s lacks a requisite callback "
 208                        "function\n", p_drv->drv.name);
 209
 210         while (did && did->match_flags) {
 211                 for (i=0; i<4; i++) {
 212                         if (!did->prod_id[i])
 213                                 continue;
 214
 215                         hash = crc32(0, did->prod_id[i], strlen(did->prod_id[i]));
 216                         if (hash == did->prod_id_hash[i])
 217                                 continue;
 218
 219                         printk(KERN_DEBUG "pcmcia: %s: invalid hash for "
 220                                "product string \"%s\": is 0x%x, should "
 221                                "be 0x%x\n", p_drv->drv.name, did->prod_id[i],
 222                                did->prod_id_hash[i], hash);
 223                         printk(KERN_DEBUG "pcmcia: see "
 224                                 "Documentation/pcmcia/devicetable.txt for "
 225                                 "details\n");
 226                 }
 227                 did++;
 228         }
 229
 230         return;
 231 }
 232
 233
 234 #ifdef CONFIG_PCMCIA_LOAD_CIS
 235
 236 /**
 237  * pcmcia_load_firmware - load CIS from userspace if device-provided is broken
 238  * @dev - the pcmcia device which needs a CIS override
 239  * @filename - requested filename in /lib/firmware/cis/
 240  *
 241  * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if
 242  * the one provided by the card is broken. The firmware files reside in
 243  * /lib/firmware/cis/ in userspace.
 244  */
 245 static int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
 246 {
 247         struct pcmcia_socket *s = dev->socket;
 248         const struct firmware *fw;
 249         char path[20];
 250         int ret=-ENOMEM;
 251         cisdump_t *cis;
 252
 253         if (!filename)
 254                 return -EINVAL;
 255
 256         ds_dbg(1, "trying to load firmware %s\n", filename);
 257
 258         if (strlen(filename) > 14)
 259                 return -EINVAL;
 260
 261         snprintf(path, 20, "%s", filename);
 262
 263         if (request_firmware(&fw, path, &dev->dev) == 0) {
 264                 if (fw->size >= CISTPL_MAX_CIS_SIZE)
 265                         goto release;
 266
 267                 cis = kmalloc(sizeof(cisdump_t), GFP_KERNEL);
 268                 if (!cis)
 269                         goto release;
 270
 271                 memset(cis, 0, sizeof(cisdump_t));
 272
 273                 cis->Length = fw->size + 1;
 274                 memcpy(cis->Data, fw->data, fw->size);
 275
 276                 if (!pcmcia_replace_cis(s, cis))
 277                         ret = 0;
 278         }
 279  release:
 280         release_firmware(fw);
 281
 282         return (ret);
 283 }
 284
 285 #else /* !CONFIG_PCMCIA_LOAD_CIS */
 286
 287 static inline int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
 288 {
 289         return -ENODEV;
 290 }
 291
 292 #endif
 293
 294
 295 /*======================================================================*/
 296
 297
 298 /**
 299  * pcmcia_register_driver - register a PCMCIA driver with the bus core
 300  *
 301  * Registers a PCMCIA driver with the PCMCIA bus core.
 302  */
 303 static int pcmcia_device_probe(struct device *dev);
 304 static int pcmcia_device_remove(struct device * dev);
 305
 306 int pcmcia_register_driver(struct pcmcia_driver *driver)
 307 {
 308         if (!driver)
 309                 return -EINVAL;
 310
 311         pcmcia_check_driver(driver);
 312
 313         /* initialize common fields */
 314         driver->drv.bus = &pcmcia_bus_type;
 315         driver->drv.owner = driver->owner;
 316         driver->drv.probe = pcmcia_device_probe;
 317         driver->drv.remove = pcmcia_device_remove;
 318
 319         return driver_register(&driver->drv);
 320 }
 321 EXPORT_SYMBOL(pcmcia_register_driver);
 322
 323 /**
 324  * pcmcia_unregister_driver - unregister a PCMCIA driver with the bus core
 325  */
 326 void pcmcia_unregister_driver(struct pcmcia_driver *driver)
 327 {
 328         driver_unregister(&driver->drv);
 329 }
 330 EXPORT_SYMBOL(pcmcia_unregister_driver);
 331
 332
 333 /* pcmcia_device handling */
 334
 335 struct pcmcia_device * pcmcia_get_dev(struct pcmcia_device *p_dev)
 336 {
 337         struct device *tmp_dev;
 338         tmp_dev = get_device(&p_dev->dev);
 339         if (!tmp_dev)
 340                 return NULL;
 341         return to_pcmcia_dev(tmp_dev);
 342 }
 343
 344 void pcmcia_put_dev(struct pcmcia_device *p_dev)
 345 {
 346         if (p_dev)
 347                 put_device(&p_dev->dev);
 348 }
 349
 350 static void pcmcia_release_dev(struct device *dev)
 351 {
 352         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 353         ds_dbg(1, "releasing dev %p\n", p_dev);
 354         pcmcia_put_socket(p_dev->socket);
 355         kfree(p_dev->devname);
 356         kfree(p_dev);
 357 }
 358
 359
 360 static int pcmcia_device_probe(struct device * dev)
 361 {
 362         struct pcmcia_device *p_dev;
 363         struct pcmcia_driver *p_drv;
 364         int ret = 0;
 365
 366         dev = get_device(dev);
 367         if (!dev)
 368                 return -ENODEV;
 369
 370         p_dev = to_pcmcia_dev(dev);
 371         p_drv = to_pcmcia_drv(dev->driver);
 372
 373         if (!try_module_get(p_drv->owner)) {
 374                 ret = -EINVAL;
 375                 goto put_dev;
 376         }
 377
 378         if (p_drv->attach) {
 379                 p_dev->instance = p_drv->attach();
 380                 if ((!p_dev->instance) || (p_dev->state & CLIENT_UNBOUND)) {
 381                         printk(KERN_NOTICE "ds: unable to create instance "
 382                                "of '%s'!\n", p_drv->drv.name);
 383                         ret = -EINVAL;
 384                 }
 385         }
 386
 387         if (ret)
 388                 module_put(p_drv->owner);
 389  put_dev:
 390         if ((ret) || !(p_drv->attach))
 391                 put_device(dev);
 392         return (ret);
 393 }
 394
 395
 396 static int pcmcia_device_remove(struct device * dev)
 397 {
 398         struct pcmcia_device *p_dev;
 399         struct pcmcia_driver *p_drv;
 400         int i;
 401
 402         /* detach the "instance" */
 403         p_dev = to_pcmcia_dev(dev);
 404         p_drv = to_pcmcia_drv(dev->driver);
 405
 406         /* the likely, new path */
 407         if (p_drv && p_drv->remove) {
 408                 p_drv->remove(p_dev);
 409
 410                 /* check for proper unloading */
 411                 if (p_dev->state & (CLIENT_IRQ_REQ|CLIENT_IO_REQ|CLIENT_CONFIG_LOCKED))
 412                         printk(KERN_INFO "pcmcia: driver %s did not release config properly\n",
 413                                p_drv->drv.name);
 414
 415                 for (i = 0; i < MAX_WIN; i++)
 416                         if (p_dev->state & CLIENT_WIN_REQ(i))
 417                                 printk(KERN_INFO "pcmcia: driver %s did not release windows properly\n",
 418                                        p_drv->drv.name);
 419
 420                 /* undo pcmcia_register_client */
 421                 p_dev->state = CLIENT_UNBOUND;
 422                 pcmcia_put_dev(p_dev);
 423
 424                 /* references from pcmcia_probe_device */
 425                 pcmcia_put_dev(p_dev);
 426                 module_put(p_drv->owner);
 427
 428                 return 0;
 429         }
 430
 431         /* old path */
 432         if (p_drv) {
 433                 if ((p_drv->detach) && (p_dev->instance)) {
 434                         printk(KERN_INFO "pcmcia: using deprecated detach mechanism. Fix the driver!\n");
 435
 436                         p_drv->detach(p_dev->instance);
 437                         /* from pcmcia_probe_device */
 438                         put_device(&p_dev->dev);
 439                 }
 440                 module_put(p_drv->owner);
 441         }
 442
 443         return 0;
 444 }
 445
 446
 447 /*
 448  * Removes a PCMCIA card from the device tree and socket list.
 449  */
 450 static void pcmcia_card_remove(struct pcmcia_socket *s)
 451 {
 452         struct pcmcia_device    *p_dev;
 453         unsigned long           flags;
 454
 455         ds_dbg(2, "unbind_request(%d)\n", s->sock);
 456
 457         s->device_count = 0;
 458
 459         for (;;) {
 460                 /* unregister all pcmcia_devices registered with this socket*/
 461                 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 462                 if (list_empty(&s->devices_list)) {
 463                         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 464                         return;
 465                 }
 466                 p_dev = list_entry((&s->devices_list)->next, struct pcmcia_device, socket_device_list);
 467                 list_del(&p_dev->socket_device_list);
 468                 p_dev->state |= CLIENT_STALE;
 469                 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 470
 471                 device_unregister(&p_dev->dev);
 472         }
 473
 474         return;
 475 } /* unbind_request */
 476
 477
 478 /*
 479  * pcmcia_device_query -- determine information about a pcmcia device
 480  */
 481 static int pcmcia_device_query(struct pcmcia_device *p_dev)
 482 {
 483         cistpl_manfid_t manf_id;
 484         cistpl_funcid_t func_id;
 485         cistpl_vers_1_t *vers1;
 486         unsigned int i;
 487
 488         vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL);
 489         if (!vers1)
 490                 return -ENOMEM;
 491
 492         if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 493                                CISTPL_MANFID, &manf_id)) {
 494                 p_dev->manf_id = manf_id.manf;
 495                 p_dev->card_id = manf_id.card;
 496                 p_dev->has_manf_id = 1;
 497                 p_dev->has_card_id = 1;
 498         }
 499
 500         if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 501                                CISTPL_FUNCID, &func_id)) {
 502                 p_dev->func_id = func_id.func;
 503                 p_dev->has_func_id = 1;
 504         } else {
 505                 /* rule of thumb: cards with no FUNCID, but with
 506                  * common memory device geometry information, are
 507                  * probably memory cards (from pcmcia-cs) */
 508                 cistpl_device_geo_t *devgeo;
 509
 510                 devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL);
 511                 if (!devgeo) {
 512                         kfree(vers1);
 513                         return -ENOMEM;
 514                 }
 515                 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 516                                       CISTPL_DEVICE_GEO, devgeo)) {
 517                         ds_dbg(0, "mem device geometry probably means "
 518                                "FUNCID_MEMORY\n");
 519                         p_dev->func_id = CISTPL_FUNCID_MEMORY;
 520                         p_dev->has_func_id = 1;
 521                 }
 522                 kfree(devgeo);
 523         }
 524
 525         if (!pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_VERS_1,
 526                                vers1)) {
 527                 for (i=0; i < vers1->ns; i++) {
 528                         char *tmp;
 529                         unsigned int length;
 530
 531                         tmp = vers1->str + vers1->ofs[i];
 532
 533                         length = strlen(tmp) + 1;
 534                         if ((length < 3) || (length > 255))
 535                                 continue;
 536
 537                         p_dev->prod_id[i] = kmalloc(sizeof(char) * length,
 538                                                     GFP_KERNEL);
 539                         if (!p_dev->prod_id[i])
 540                                 continue;
 541
 542                         p_dev->prod_id[i] = strncpy(p_dev->prod_id[i],
 543                                                     tmp, length);
 544                 }
 545         }
 546
 547         kfree(vers1);
 548         return 0;
 549 }
 550
 551
 552 /* device_add_lock is needed to avoid double registration by cardmgr and kernel.
 553  * Serializes pcmcia_device_add; will most likely be removed in future.
 554  *
 555  * While it has the caveat that adding new PCMCIA devices inside(!) device_register()
 556  * won't work, this doesn't matter much at the moment: the driver core doesn't
 557  * support it either.
 558  */
 559 static DECLARE_MUTEX(device_add_lock);
 560
 561 struct pcmcia_device * pcmcia_device_add(struct pcmcia_socket *s, unsigned int function)
 562 {
 563         struct pcmcia_device *p_dev;
 564         unsigned long flags;
 565         int bus_id_len;
 566
 567         s = pcmcia_get_socket(s);
 568         if (!s)
 569                 return NULL;
 570
 571         down(&device_add_lock);
 572
 573         /* max of 2 devices per card */
 574         if (s->device_count == 2)
 575                 goto err_put;
 576
 577         p_dev = kmalloc(sizeof(struct pcmcia_device), GFP_KERNEL);
 578         if (!p_dev)
 579                 goto err_put;
 580         memset(p_dev, 0, sizeof(struct pcmcia_device));
 581
 582         p_dev->socket = s;
 583         p_dev->device_no = (s->device_count++);
 584         p_dev->func   = function;
 585
 586         p_dev->dev.bus = &pcmcia_bus_type;
 587         p_dev->dev.parent = s->dev.dev;
 588         p_dev->dev.release = pcmcia_release_dev;
 589         bus_id_len = sprintf (p_dev->dev.bus_id, "%d.%d", p_dev->socket->sock, p_dev->device_no);
 590
 591         p_dev->devname = kmalloc(6 + bus_id_len + 1, GFP_KERNEL);
 592         if (!p_dev->devname)
 593                 goto err_free;
 594         sprintf (p_dev->devname, "pcmcia%s", p_dev->dev.bus_id);
 595
 596         /* compat */
 597         p_dev->state = CLIENT_UNBOUND;
 598
 599         /* Add to the list in pcmcia_bus_socket */
 600         spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 601         list_add_tail(&p_dev->socket_device_list, &s->devices_list);
 602         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 603
 604         printk(KERN_NOTICE "pcmcia: registering new device %s\n",
 605                p_dev->devname);
 606
 607         pcmcia_device_query(p_dev);
 608
 609         if (device_register(&p_dev->dev)) {
 610                 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 611                 list_del(&p_dev->socket_device_list);
 612                 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 613
 614                 goto err_free;
 615        }
 616
 617         up(&device_add_lock);
 618
 619         return p_dev;
 620
 621  err_free:
 622         kfree(p_dev->devname);
 623         kfree(p_dev);
 624         s->device_count--;
 625  err_put:
 626         up(&device_add_lock);
 627         pcmcia_put_socket(s);
 628
 629         return NULL;
 630 }
 631
 632
 633 static int pcmcia_card_add(struct pcmcia_socket *s)
 634 {
 635         cisinfo_t cisinfo;
 636         cistpl_longlink_mfc_t mfc;
 637         unsigned int no_funcs, i;
 638         int ret = 0;
 639
 640         if (!(s->resource_setup_done))
 641                 return -EAGAIN; /* try again, but later... */
 642
 643         if (pcmcia_validate_mem(s))
 644                 return -EAGAIN; /* try again, but later... */
 645
 646         ret = pccard_validate_cis(s, BIND_FN_ALL, &cisinfo);
 647         if (ret || !cisinfo.Chains) {
 648                 ds_dbg(0, "invalid CIS or invalid resources\n");
 649                 return -ENODEV;
 650         }
 651
 652         if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
 653                 no_funcs = mfc.nfn;
 654         else
 655                 no_funcs = 1;
 656
 657         for (i=0; i < no_funcs; i++)
 658                 pcmcia_device_add(s, i);
 659
 660         return (ret);
 661 }
 662
 663
 664 static void pcmcia_delayed_add_pseudo_device(void *data)
 665 {
 666         struct pcmcia_socket *s = data;
 667         pcmcia_device_add(s, 0);
 668         s->pcmcia_state.device_add_pending = 0;
 669 }
 670
 671 static inline void pcmcia_add_pseudo_device(struct pcmcia_socket *s)
 672 {
 673         if (!s->pcmcia_state.device_add_pending) {
 674                 s->pcmcia_state.device_add_pending = 1;
 675                 schedule_work(&s->device_add);
 676         }
 677         return;
 678 }
 679
 680 static int pcmcia_requery(struct device *dev, void * _data)
 681 {
 682         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 683         if (!p_dev->dev.driver)
 684                 pcmcia_device_query(p_dev);
 685
 686         return 0;
 687 }
 688
 689 static void pcmcia_bus_rescan(struct pcmcia_socket *skt)
 690 {
 691         int no_devices=0;
 692         unsigned long flags;
 693
 694         /* must be called with skt_sem held */
 695         spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 696         if (list_empty(&skt->devices_list))
 697                 no_devices=1;
 698         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 699
 700         /* if no devices were added for this socket yet because of
 701          * missing resource information or other trouble, we need to
 702          * do this now. */
 703         if (no_devices) {
 704                 int ret = pcmcia_card_add(skt);
 705                 if (ret)
 706                         return;
 707         }
 708
 709         /* some device information might have changed because of a CIS
 710          * update or because we can finally read it correctly... so
 711          * determine it again, overwriting old values if necessary. */
 712         bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery);
 713
 714         /* we re-scan all devices, not just the ones connected to this
 715          * socket. This does not matter, though. */
 716         bus_rescan_devices(&pcmcia_bus_type);
 717 }
 718
 719 static inline int pcmcia_devmatch(struct pcmcia_device *dev,
 720                                   struct pcmcia_device_id *did)
 721 {
 722         if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
 723                 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
 724                         return 0;
 725         }
 726
 727         if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
 728                 if ((!dev->has_card_id) || (dev->card_id != did->card_id))
 729                         return 0;
 730         }
 731
 732         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
 733                 if (dev->func != did->function)
 734                         return 0;
 735         }
 736
 737         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
 738                 if (!dev->prod_id[0])
 739                         return 0;
 740                 if (strcmp(did->prod_id[0], dev->prod_id[0]))
 741                         return 0;
 742         }
 743
 744         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
 745                 if (!dev->prod_id[1])
 746                         return 0;
 747                 if (strcmp(did->prod_id[1], dev->prod_id[1]))
 748                         return 0;
 749         }
 750
 751         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
 752                 if (!dev->prod_id[2])
 753                         return 0;
 754                 if (strcmp(did->prod_id[2], dev->prod_id[2]))
 755                         return 0;
 756         }
 757
 758         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
 759                 if (!dev->prod_id[3])
 760                         return 0;
 761                 if (strcmp(did->prod_id[3], dev->prod_id[3]))
 762                         return 0;
 763         }
 764
 765         if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
 766                 /* handle pseudo multifunction devices:
 767                  * there are at most two pseudo multifunction devices.
 768                  * if we're matching against the first, schedule a
 769                  * call which will then check whether there are two
 770                  * pseudo devices, and if not, add the second one.
 771                  */
 772                 if (dev->device_no == 0)
 773                         pcmcia_add_pseudo_device(dev->socket);
 774
 775                 if (dev->device_no != did->device_no)
 776                         return 0;
 777         }
 778
 779         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
 780                 if ((!dev->has_func_id) || (dev->func_id != did->func_id))
 781                         return 0;
 782
 783                 /* if this is a pseudo-multi-function device,
 784                  * we need explicit matches */
 785                 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO)
 786                         return 0;
 787                 if (dev->device_no)
 788                         return 0;
 789
 790                 /* also, FUNC_ID matching needs to be activated by userspace
 791                  * after it has re-checked that there is no possible module
 792                  * with a prod_id/manf_id/card_id match.
 793                  */
 794                 if (!dev->allow_func_id_match)
 795                         return 0;
 796         }
 797
 798         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
 799                 if (!dev->socket->fake_cis)
 800                         pcmcia_load_firmware(dev, did->cisfile);
 801
 802                 if (!dev->socket->fake_cis)
 803                         return 0;
 804         }
 805
 806         if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
 807                 int i;
 808                 for (i=0; i<4; i++)
 809                         if (dev->prod_id[i])
 810                                 return 0;
 811                 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
 812                         return 0;
 813         }
 814
 815         dev->dev.driver_data = (void *) did;
 816
 817         return 1;
 818 }
 819
 820
 821 static int pcmcia_bus_match(struct device * dev, struct device_driver * drv) {
 822         struct pcmcia_device * p_dev = to_pcmcia_dev(dev);
 823         struct pcmcia_driver * p_drv = to_pcmcia_drv(drv);
 824         struct pcmcia_device_id *did = p_drv->id_table;
 825
 826         /* matching by cardmgr */
 827         if (p_dev->cardmgr == p_drv)
 828                 return 1;
 829
 830         while (did && did->match_flags) {
 831                 if (pcmcia_devmatch(p_dev, did))
 832                         return 1;
 833                 did++;
 834         }
 835
 836         return 0;
 837 }
 838
 839 #ifdef CONFIG_HOTPLUG
 840
 841 static int pcmcia_bus_uevent(struct device *dev, char **envp, int num_envp,
 842                              char *buffer, int buffer_size)
 843 {
 844         struct pcmcia_device *p_dev;
 845         int i, length = 0;
 846         u32 hash[4] = { 0, 0, 0, 0};
 847
 848         if (!dev)
 849                 return -ENODEV;
 850
 851         p_dev = to_pcmcia_dev(dev);
 852
 853         /* calculate hashes */
 854         for (i=0; i<4; i++) {
 855                 if (!p_dev->prod_id[i])
 856                         continue;
 857                 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
 858         }
 859
 860         i = 0;
 861
 862         if (add_uevent_var(envp, num_envp, &i,
 863                            buffer, buffer_size, &length,
 864                            "SOCKET_NO=%u",
 865                            p_dev->socket->sock))
 866                 return -ENOMEM;
 867
 868         if (add_uevent_var(envp, num_envp, &i,
 869                            buffer, buffer_size, &length,
 870                            "DEVICE_NO=%02X",
 871                            p_dev->device_no))
 872                 return -ENOMEM;
 873
 874         if (add_uevent_var(envp, num_envp, &i,
 875                            buffer, buffer_size, &length,
 876                            "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
 877                            "pa%08Xpb%08Xpc%08Xpd%08X",
 878                            p_dev->has_manf_id ? p_dev->manf_id : 0,
 879                            p_dev->has_card_id ? p_dev->card_id : 0,
 880                            p_dev->has_func_id ? p_dev->func_id : 0,
 881                            p_dev->func,
 882                            p_dev->device_no,
 883                            hash[0],
 884                            hash[1],
 885                            hash[2],
 886                            hash[3]))
 887                 return -ENOMEM;
 888
 889         envp[i] = NULL;
 890
 891         return 0;
 892 }
 893
 894 #else
 895
 896 static int pcmcia_bus_uevent(struct device *dev, char **envp, int num_envp,
 897                               char *buffer, int buffer_size)
 898 {
 899         return -ENODEV;
 900 }
 901
 902 #endif
 903
 904 /************************ per-device sysfs output ***************************/
 905
 906 #define pcmcia_device_attr(field, test, format)                         \
 907 static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf)              \
 908 {                                                                       \
 909         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);               \
 910         return p_dev->test ? sprintf (buf, format, p_dev->field) : -ENODEV; \
 911 }
 912
 913 #define pcmcia_device_stringattr(name, field)                                   \
 914 static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf)               \
 915 {                                                                       \
 916         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);               \
 917         return p_dev->field ? sprintf (buf, "%s\n", p_dev->field) : -ENODEV; \
 918 }
 919
 920 pcmcia_device_attr(func, socket, "0x%02x\n");
 921 pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
 922 pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
 923 pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
 924 pcmcia_device_stringattr(prod_id1, prod_id[0]);
 925 pcmcia_device_stringattr(prod_id2, prod_id[1]);
 926 pcmcia_device_stringattr(prod_id3, prod_id[2]);
 927 pcmcia_device_stringattr(prod_id4, prod_id[3]);
 928
 929 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
 930 {
 931         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 932         int i;
 933         u32 hash[4] = { 0, 0, 0, 0};
 934
 935         /* calculate hashes */
 936         for (i=0; i<4; i++) {
 937                 if (!p_dev->prod_id[i])
 938                         continue;
 939                 hash[i] = crc32(0,p_dev->prod_id[i],strlen(p_dev->prod_id[i]));
 940         }
 941         return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
 942                                 "pa%08Xpb%08Xpc%08Xpd%08X\n",
 943                                 p_dev->has_manf_id ? p_dev->manf_id : 0,
 944                                 p_dev->has_card_id ? p_dev->card_id : 0,
 945                                 p_dev->has_func_id ? p_dev->func_id : 0,
 946                                 p_dev->func, p_dev->device_no,
 947                                 hash[0], hash[1], hash[2], hash[3]);
 948 }
 949
 950 static ssize_t pcmcia_store_allow_func_id_match(struct device *dev,
 951                 struct device_attribute *attr, const char *buf, size_t count)
 952 {
 953         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 954         if (!count)
 955                 return -EINVAL;
 956
 957         down(&p_dev->socket->skt_sem);
 958         p_dev->allow_func_id_match = 1;
 959         up(&p_dev->socket->skt_sem);
 960
 961         bus_rescan_devices(&pcmcia_bus_type);
 962
 963         return count;
 964 }
 965
 966 static struct device_attribute pcmcia_dev_attrs[] = {
 967         __ATTR(function, 0444, func_show, NULL),
 968         __ATTR_RO(func_id),
 969         __ATTR_RO(manf_id),
 970         __ATTR_RO(card_id),
 971         __ATTR_RO(prod_id1),
 972         __ATTR_RO(prod_id2),
 973         __ATTR_RO(prod_id3),
 974         __ATTR_RO(prod_id4),
 975         __ATTR_RO(modalias),
 976         __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match),
 977         __ATTR_NULL,
 978 };
 979
 980 /* PM support, also needed for reset */
 981
 982 static int pcmcia_dev_suspend(struct device * dev, pm_message_t state)
 983 {
 984         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 985         struct pcmcia_driver *p_drv = NULL;
 986
 987         if (dev->driver)
 988                 p_drv = to_pcmcia_drv(dev->driver);
 989
 990         if (p_drv && p_drv->suspend)
 991                 return p_drv->suspend(p_dev);
 992
 993         return 0;
 994 }
 995
 996
 997 static int pcmcia_dev_resume(struct device * dev)
 998 {
 999         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1000         struct pcmcia_driver *p_drv = NULL;
1001
1002         if (dev->driver)
1003                 p_drv = to_pcmcia_drv(dev->driver);
1004
1005         if (p_drv && p_drv->resume)
1006                 return p_drv->resume(p_dev);
1007
1008         return 0;
1009 }
1010
1011
1012 static int pcmcia_bus_suspend_callback(struct device *dev, void * _data)
1013 {
1014         struct pcmcia_socket *skt = _data;
1015         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1016
1017         if (p_dev->socket != skt)
1018                 return 0;
1019
1020         return dpm_runtime_suspend(dev, PMSG_SUSPEND);
1021 }
1022
1023 static int pcmcia_bus_resume_callback(struct device *dev, void * _data)
1024 {
1025         struct pcmcia_socket *skt = _data;
1026         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1027
1028         if (p_dev->socket != skt)
1029                 return 0;
1030
1031         dpm_runtime_resume(dev);
1032
1033         return 0;
1034 }
1035
1036 static int pcmcia_bus_resume(struct pcmcia_socket *skt)
1037 {
1038         bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback);
1039         return 0;
1040 }
1041
1042 static int pcmcia_bus_suspend(struct pcmcia_socket *skt)
1043 {
1044         if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt,
1045                              pcmcia_bus_suspend_callback)) {
1046                 pcmcia_bus_resume(skt);
1047                 return -EIO;
1048         }
1049         return 0;
1050 }
1051
1052
1053 /*======================================================================
1054
1055     The card status event handler.
1056
1057 ======================================================================*/
1058
1059 struct send_event_data {
1060         struct pcmcia_socket *skt;
1061         event_t event;
1062         int priority;
1063 };
1064
1065 static int send_event_callback(struct device *dev, void * _data)
1066 {
1067         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1068         struct pcmcia_driver *p_drv;
1069         struct send_event_data *data = _data;
1070
1071         /* we get called for all sockets, but may only pass the event
1072          * for drivers _on the affected socket_ */
1073         if (p_dev->socket != data->skt)
1074                 return 0;
1075
1076         p_drv = to_pcmcia_drv(p_dev->dev.driver);
1077         if (!p_drv)
1078                 return 0;
1079
1080         if (p_dev->state & (CLIENT_UNBOUND|CLIENT_STALE))
1081                 return 0;
1082
1083         if (p_drv->event)
1084                 return p_drv->event(data->event, data->priority,
1085                                     &p_dev->event_callback_args);
1086
1087         return 0;
1088 }
1089
1090 static int send_event(struct pcmcia_socket *s, event_t event, int priority)
1091 {
1092         struct send_event_data private;
1093
1094         private.skt = s;
1095         private.event = event;
1096         private.priority = priority;
1097
1098         return bus_for_each_dev(&pcmcia_bus_type, NULL, &private, send_event_callback);
1099 } /* send_event */
1100
1101
1102 /* Normally, the event is passed to individual drivers after
1103  * informing userspace. Only for CS_EVENT_CARD_REMOVAL this
1104  * is inversed to maintain historic compatibility.
1105  */
1106
1107 static int ds_event(struct pcmcia_socket *skt, event_t event, int priority)
1108 {
1109         struct pcmcia_socket *s = pcmcia_get_socket(skt);
1110         int ret = 0;
1111
1112         ds_dbg(1, "ds_event(0x%06x, %d, 0x%p)\n",
1113                event, priority, skt);
1114
1115         switch (event) {
1116
1117         case CS_EVENT_CARD_REMOVAL:
1118                 s->pcmcia_state.present = 0;
1119                 send_event(skt, event, priority);
1120                 pcmcia_card_remove(skt);
1121                 handle_event(skt, event);
1122                 break;
1123
1124         case CS_EVENT_CARD_INSERTION:
1125                 s->pcmcia_state.present = 1;
1126                 pcmcia_card_add(skt);
1127                 handle_event(skt, event);
1128                 break;
1129
1130         case CS_EVENT_EJECTION_REQUEST:
1131                 ret = send_event(skt, event, priority);
1132                 break;
1133
1134         case CS_EVENT_PM_SUSPEND:
1135         case CS_EVENT_PM_RESUME:
1136         case CS_EVENT_RESET_PHYSICAL:
1137         case CS_EVENT_CARD_RESET:
1138                 handle_event(skt, event);
1139                 break;
1140
1141         default:
1142                 handle_event(skt, event);
1143                 send_event(skt, event, priority);
1144                 break;
1145     }
1146
1147     pcmcia_put_socket(s);
1148
1149     return 0;
1150 } /* ds_event */
1151
1152
1153
1154 int pcmcia_register_client(struct pcmcia_device **handle, client_reg_t *req)
1155 {
1156         struct pcmcia_socket *s = NULL;
1157         struct pcmcia_device *p_dev = NULL;
1158         struct pcmcia_driver *p_drv = NULL;
1159
1160         /* Look for unbound client with matching dev_info */
1161         down_read(&pcmcia_socket_list_rwsem);
1162         list_for_each_entry(s, &pcmcia_socket_list, socket_list) {
1163                 unsigned long flags;
1164
1165                 if (s->state & SOCKET_CARDBUS)
1166                         continue;
1167
1168                 s = pcmcia_get_socket(s);
1169                 if (!s)
1170                         continue;
1171                 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
1172                 list_for_each_entry(p_dev, &s->devices_list, socket_device_list) {
1173                         p_dev = pcmcia_get_dev(p_dev);
1174                         if (!p_dev)
1175                                 continue;
1176                         if (!(p_dev->state & CLIENT_UNBOUND) ||
1177                             (!p_dev->dev.driver)) {
1178                                 pcmcia_put_dev(p_dev);
1179                                 continue;
1180                         }
1181                         p_drv = to_pcmcia_drv(p_dev->dev.driver);
1182                         if (!strncmp(p_drv->drv.name, (char *)req->dev_info, DEV_NAME_LEN)) {
1183                                 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
1184                                 goto found;
1185                         }
1186                         pcmcia_put_dev(p_dev);
1187                 }
1188                 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
1189                 pcmcia_put_socket(s);
1190         }
1191  found:
1192         up_read(&pcmcia_socket_list_rwsem);
1193         if (!p_dev)
1194                 return -ENODEV;
1195
1196         pcmcia_put_socket(s); /* safe, as we already hold a reference from bind_device */
1197
1198         *handle = p_dev;
1199         p_dev->state &= ~CLIENT_UNBOUND;
1200         p_dev->event_callback_args = req->event_callback_args;
1201         p_dev->event_callback_args.client_handle = p_dev;
1202
1203
1204         if (!s->functions) {
1205                 cistpl_longlink_mfc_t mfc;
1206                 if (pccard_read_tuple(s, p_dev->func, CISTPL_LONGLINK_MFC, &mfc)
1207                     == CS_SUCCESS)
1208                         s->functions = mfc.nfn;
1209                 else
1210                         s->functions = 1;
1211                 s->config = kmalloc(sizeof(config_t) * s->functions,
1212                                     GFP_KERNEL);
1213                 if (!s->config)
1214                         goto out_no_resource;
1215                 memset(s->config, 0, sizeof(config_t) * s->functions);
1216         }
1217
1218         ds_dbg(1, "register_client(): client 0x%p, dev %s\n",
1219                p_dev, p_dev->dev.bus_id);
1220
1221         if ((s->state & (SOCKET_PRESENT|SOCKET_CARDBUS)) == SOCKET_PRESENT) {
1222                 if (p_drv->event)
1223                         p_drv->event(CS_EVENT_CARD_INSERTION, CS_EVENT_PRI_LOW,
1224                                      &p_dev->event_callback_args);
1225
1226         }
1227
1228         return CS_SUCCESS;
1229
1230  out_no_resource:
1231         pcmcia_put_dev(p_dev);
1232         return CS_OUT_OF_RESOURCE;
1233 } /* register_client */
1234 EXPORT_SYMBOL(pcmcia_register_client);
1235
1236
1237 int pcmcia_deregister_client(struct pcmcia_device *p_dev)
1238 {
1239         struct pcmcia_socket *s;
1240         int i;
1241
1242         s = p_dev->socket;
1243         ds_dbg(1, "deregister_client(%p)\n", p_dev);
1244
1245         if (p_dev->state & (CLIENT_IRQ_REQ|CLIENT_IO_REQ|CLIENT_CONFIG_LOCKED))
1246                 goto warn_out;
1247         for (i = 0; i < MAX_WIN; i++)
1248                 if (p_dev->state & CLIENT_WIN_REQ(i))
1249                         goto warn_out;
1250
1251         if (p_dev->state & CLIENT_STALE) {
1252                 p_dev->state &= ~CLIENT_STALE;
1253                 pcmcia_put_dev(p_dev);
1254         } else {
1255                 p_dev->state = CLIENT_UNBOUND;
1256         }
1257
1258         return CS_SUCCESS;
1259  warn_out:
1260         printk(KERN_WARNING "ds: deregister_client was called too early.\n");
1261         return CS_IN_USE;
1262 } /* deregister_client */
1263 EXPORT_SYMBOL(pcmcia_deregister_client);
1264
1265
1266 static struct pcmcia_callback pcmcia_bus_callback = {
1267         .owner = THIS_MODULE,
1268         .event = ds_event,
1269         .requery = pcmcia_bus_rescan,
1270         .suspend = pcmcia_bus_suspend,
1271         .resume = pcmcia_bus_resume,
1272 };
1273
1274 static int __devinit pcmcia_bus_add_socket(struct class_device *class_dev,
1275                                            struct class_interface *class_intf)
1276 {
1277         struct pcmcia_socket *socket = class_get_devdata(class_dev);
1278         int ret;
1279
1280         socket = pcmcia_get_socket(socket);
1281         if (!socket) {
1282                 printk(KERN_ERR "PCMCIA obtaining reference to socket %p failed\n", socket);
1283                 return -ENODEV;
1284         }
1285
1286         /*
1287          * Ugly. But we want to wait for the socket threads to have started up.
1288          * We really should let the drivers themselves drive some of this..
1289          */
1290         msleep(250);
1291
1292 #ifdef CONFIG_PCMCIA_IOCTL
1293         init_waitqueue_head(&socket->queue);
1294 #endif
1295         INIT_LIST_HEAD(&socket->devices_list);
1296         INIT_WORK(&socket->device_add, pcmcia_delayed_add_pseudo_device, socket);
1297         memset(&socket->pcmcia_state, 0, sizeof(u8));
1298         socket->device_count = 0;
1299
1300         ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback);
1301         if (ret) {
1302                 printk(KERN_ERR "PCMCIA registration PCCard core failed for socket %p\n", socket);
1303                 pcmcia_put_socket(socket);
1304                 return (ret);
1305         }
1306
1307         return 0;
1308 }
1309
1310 static void pcmcia_bus_remove_socket(struct class_device *class_dev,
1311                                      struct class_interface *class_intf)
1312 {
1313         struct pcmcia_socket *socket = class_get_devdata(class_dev);
1314
1315         if (!socket)
1316                 return;
1317
1318         socket->pcmcia_state.dead = 1;
1319         pccard_register_pcmcia(socket, NULL);
1320
1321         pcmcia_put_socket(socket);
1322
1323         return;
1324 }
1325
1326
1327 /* the pcmcia_bus_interface is used to handle pcmcia socket devices */
1328 static struct class_interface pcmcia_bus_interface = {
1329         .class = &pcmcia_socket_class,
1330         .add = &pcmcia_bus_add_socket,
1331         .remove = &pcmcia_bus_remove_socket,
1332 };
1333
1334
1335 struct bus_type pcmcia_bus_type = {
1336         .name = "pcmcia",
1337         .uevent = pcmcia_bus_uevent,
1338         .match = pcmcia_bus_match,
1339         .dev_attrs = pcmcia_dev_attrs,
1340         .suspend = pcmcia_dev_suspend,
1341         .resume = pcmcia_dev_resume,
1342 };
1343
1344
1345 static int __init init_pcmcia_bus(void)
1346 {
1347         spin_lock_init(&pcmcia_dev_list_lock);
1348
1349         bus_register(&pcmcia_bus_type);
1350         class_interface_register(&pcmcia_bus_interface);
1351
1352         pcmcia_setup_ioctl();
1353
1354         return 0;
1355 }
1356 fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that
1357                                * pcmcia_socket_class is already registered */
1358
1359
1360 static void __exit exit_pcmcia_bus(void)
1361 {
1362         pcmcia_cleanup_ioctl();
1363
1364         class_interface_unregister(&pcmcia_bus_interface);
1365
1366         bus_unregister(&pcmcia_bus_type);
1367 }
1368 module_exit(exit_pcmcia_bus);
1369
1370
1371 MODULE_ALIAS("ds");