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 #ifdef CONFIG_PCMCIA_DEBUG
  45 int ds_pc_debug;
  46
  47 module_param_named(pc_debug, ds_pc_debug, int, 0644);
  48
  49 #define ds_dbg(lvl, fmt, arg...) do {                           \
  50         if (ds_pc_debug > (lvl))                                \
  51                 printk(KERN_DEBUG "ds: " fmt , ## arg);         \
  52 } while (0)
  53 #define ds_dev_dbg(lvl, dev, fmt, arg...) do {                          \
  54         if (ds_pc_debug > (lvl))                                        \
  55                 dev_printk(KERN_DEBUG, dev, "ds: " fmt , ## arg);       \
  56 } while (0)
  57 #else
  58 #define ds_dbg(lvl, fmt, arg...) do { } while (0)
  59 #define ds_dev_dbg(lvl, dev, fmt, arg...) do { } while (0)
  60 #endif
  61
  62 spinlock_t pcmcia_dev_list_lock;
  63
  64 /*====================================================================*/
  65
  66 /* code which was in cs.c before */
  67
  68 /* String tables for error messages */
  69
  70 typedef struct lookup_t {
  71     const int key;
  72     const char *msg;
  73 } lookup_t;
  74
  75 static const lookup_t error_table[] = {
  76     { 0,                        "Operation succeeded" },
  77     { -EIO,                     "Input/Output error" },
  78     { -ENODEV,                  "No card present" },
  79     { -EINVAL,                  "Bad parameter" },
  80     { -EACCES,                  "Configuration locked" },
  81     { -EBUSY,                   "Resource in use" },
  82     { -ENOSPC,                  "No more items" },
  83     { -ENOMEM,                  "Out of resource" },
  84 };
  85
  86
  87 static const lookup_t service_table[] = {
  88     { AccessConfigurationRegister,      "AccessConfigurationRegister" },
  89     { AddSocketServices,                "AddSocketServices" },
  90     { AdjustResourceInfo,               "AdjustResourceInfo" },
  91     { CheckEraseQueue,                  "CheckEraseQueue" },
  92     { CloseMemory,                      "CloseMemory" },
  93     { DeregisterClient,                 "DeregisterClient" },
  94     { DeregisterEraseQueue,             "DeregisterEraseQueue" },
  95     { GetCardServicesInfo,              "GetCardServicesInfo" },
  96     { GetClientInfo,                    "GetClientInfo" },
  97     { GetConfigurationInfo,             "GetConfigurationInfo" },
  98     { GetEventMask,                     "GetEventMask" },
  99     { GetFirstClient,                   "GetFirstClient" },
 100     { GetFirstRegion,                   "GetFirstRegion" },
 101     { GetFirstTuple,                    "GetFirstTuple" },
 102     { GetNextClient,                    "GetNextClient" },
 103     { GetNextRegion,                    "GetNextRegion" },
 104     { GetNextTuple,                     "GetNextTuple" },
 105     { GetStatus,                        "GetStatus" },
 106     { GetTupleData,                     "GetTupleData" },
 107     { MapMemPage,                       "MapMemPage" },
 108     { ModifyConfiguration,              "ModifyConfiguration" },
 109     { ModifyWindow,                     "ModifyWindow" },
 110     { OpenMemory,                       "OpenMemory" },
 111     { ParseTuple,                       "ParseTuple" },
 112     { ReadMemory,                       "ReadMemory" },
 113     { RegisterClient,                   "RegisterClient" },
 114     { RegisterEraseQueue,               "RegisterEraseQueue" },
 115     { RegisterMTD,                      "RegisterMTD" },
 116     { ReleaseConfiguration,             "ReleaseConfiguration" },
 117     { ReleaseIO,                        "ReleaseIO" },
 118     { ReleaseIRQ,                       "ReleaseIRQ" },
 119     { ReleaseWindow,                    "ReleaseWindow" },
 120     { RequestConfiguration,             "RequestConfiguration" },
 121     { RequestIO,                        "RequestIO" },
 122     { RequestIRQ,                       "RequestIRQ" },
 123     { RequestSocketMask,                "RequestSocketMask" },
 124     { RequestWindow,                    "RequestWindow" },
 125     { ResetCard,                        "ResetCard" },
 126     { SetEventMask,                     "SetEventMask" },
 127     { ValidateCIS,                      "ValidateCIS" },
 128     { WriteMemory,                      "WriteMemory" },
 129     { BindDevice,                       "BindDevice" },
 130     { BindMTD,                          "BindMTD" },
 131     { ReportError,                      "ReportError" },
 132     { SuspendCard,                      "SuspendCard" },
 133     { ResumeCard,                       "ResumeCard" },
 134     { EjectCard,                        "EjectCard" },
 135     { InsertCard,                       "InsertCard" },
 136     { ReplaceCIS,                       "ReplaceCIS" }
 137 };
 138
 139 const char *pcmcia_error_func(int func)
 140 {
 141         int i;
 142
 143         for (i = 0; i < ARRAY_SIZE(service_table); i++)
 144                 if (service_table[i].key == func)
 145                         return service_table[i].msg;
 146
 147         return "Unknown service number";
 148 }
 149 EXPORT_SYMBOL(pcmcia_error_func);
 150
 151 const char *pcmcia_error_ret(int ret)
 152 {
 153         int i;
 154
 155         for (i = 0; i < ARRAY_SIZE(error_table); i++)
 156                 if (error_table[i].key == ret)
 157                         return error_table[i].msg;
 158
 159         return "unknown";
 160 }
 161 EXPORT_SYMBOL(pcmcia_error_ret);
 162
 163 /*======================================================================*/
 164
 165
 166
 167 static void pcmcia_check_driver(struct pcmcia_driver *p_drv)
 168 {
 169         struct pcmcia_device_id *did = p_drv->id_table;
 170         unsigned int i;
 171         u32 hash;
 172
 173         if (!p_drv->probe || !p_drv->remove)
 174                 printk(KERN_DEBUG "pcmcia: %s lacks a requisite callback "
 175                        "function\n", p_drv->drv.name);
 176
 177         while (did && did->match_flags) {
 178                 for (i=0; i<4; i++) {
 179                         if (!did->prod_id[i])
 180                                 continue;
 181
 182                         hash = crc32(0, did->prod_id[i], strlen(did->prod_id[i]));
 183                         if (hash == did->prod_id_hash[i])
 184                                 continue;
 185
 186                         printk(KERN_DEBUG "pcmcia: %s: invalid hash for "
 187                                "product string \"%s\": is 0x%x, should "
 188                                "be 0x%x\n", p_drv->drv.name, did->prod_id[i],
 189                                did->prod_id_hash[i], hash);
 190                         printk(KERN_DEBUG "pcmcia: see "
 191                                 "Documentation/pcmcia/devicetable.txt for "
 192                                 "details\n");
 193                 }
 194                 did++;
 195         }
 196
 197         return;
 198 }
 199
 200
 201 /*======================================================================*/
 202
 203
 204 struct pcmcia_dynid {
 205         struct list_head                node;
 206         struct pcmcia_device_id         id;
 207 };
 208
 209 /**
 210  * pcmcia_store_new_id - add a new PCMCIA device ID to this driver and re-probe devices
 211  * @driver: target device driver
 212  * @buf: buffer for scanning device ID data
 213  * @count: input size
 214  *
 215  * Adds a new dynamic PCMCIA device ID to this driver,
 216  * and causes the driver to probe for all devices again.
 217  */
 218 static ssize_t
 219 pcmcia_store_new_id(struct device_driver *driver, const char *buf, size_t count)
 220 {
 221         struct pcmcia_dynid *dynid;
 222         struct pcmcia_driver *pdrv = to_pcmcia_drv(driver);
 223         __u16 match_flags, manf_id, card_id;
 224         __u8 func_id, function, device_no;
 225         __u32 prod_id_hash[4] = {0, 0, 0, 0};
 226         int fields=0;
 227         int retval = 0;
 228
 229         fields = sscanf(buf, "%hx %hx %hx %hhx %hhx %hhx %x %x %x %x",
 230                         &match_flags, &manf_id, &card_id, &func_id, &function, &device_no,
 231                         &prod_id_hash[0], &prod_id_hash[1], &prod_id_hash[2], &prod_id_hash[3]);
 232         if (fields < 6)
 233                 return -EINVAL;
 234
 235         dynid = kzalloc(sizeof(struct pcmcia_dynid), GFP_KERNEL);
 236         if (!dynid)
 237                 return -ENOMEM;
 238
 239         dynid->id.match_flags = match_flags;
 240         dynid->id.manf_id = manf_id;
 241         dynid->id.card_id = card_id;
 242         dynid->id.func_id = func_id;
 243         dynid->id.function = function;
 244         dynid->id.device_no = device_no;
 245         memcpy(dynid->id.prod_id_hash, prod_id_hash, sizeof(__u32) * 4);
 246
 247         spin_lock(&pdrv->dynids.lock);
 248         list_add_tail(&dynid->node, &pdrv->dynids.list);
 249         spin_unlock(&pdrv->dynids.lock);
 250
 251         if (get_driver(&pdrv->drv)) {
 252                 retval = driver_attach(&pdrv->drv);
 253                 put_driver(&pdrv->drv);
 254         }
 255
 256         if (retval)
 257                 return retval;
 258         return count;
 259 }
 260 static DRIVER_ATTR(new_id, S_IWUSR, NULL, pcmcia_store_new_id);
 261
 262 static void
 263 pcmcia_free_dynids(struct pcmcia_driver *drv)
 264 {
 265         struct pcmcia_dynid *dynid, *n;
 266
 267         spin_lock(&drv->dynids.lock);
 268         list_for_each_entry_safe(dynid, n, &drv->dynids.list, node) {
 269                 list_del(&dynid->node);
 270                 kfree(dynid);
 271         }
 272         spin_unlock(&drv->dynids.lock);
 273 }
 274
 275 static int
 276 pcmcia_create_newid_file(struct pcmcia_driver *drv)
 277 {
 278         int error = 0;
 279         if (drv->probe != NULL)
 280                 error = driver_create_file(&drv->drv, &driver_attr_new_id);
 281         return error;
 282 }
 283
 284
 285 /**
 286  * pcmcia_register_driver - register a PCMCIA driver with the bus core
 287  * @driver: the &driver being registered
 288  *
 289  * Registers a PCMCIA driver with the PCMCIA bus core.
 290  */
 291 int pcmcia_register_driver(struct pcmcia_driver *driver)
 292 {
 293         int error;
 294
 295         if (!driver)
 296                 return -EINVAL;
 297
 298         pcmcia_check_driver(driver);
 299
 300         /* initialize common fields */
 301         driver->drv.bus = &pcmcia_bus_type;
 302         driver->drv.owner = driver->owner;
 303         spin_lock_init(&driver->dynids.lock);
 304         INIT_LIST_HEAD(&driver->dynids.list);
 305
 306         ds_dbg(3, "registering driver %s\n", driver->drv.name);
 307
 308         error = driver_register(&driver->drv);
 309         if (error < 0)
 310                 return error;
 311
 312         error = pcmcia_create_newid_file(driver);
 313         if (error)
 314                 driver_unregister(&driver->drv);
 315
 316         return error;
 317 }
 318 EXPORT_SYMBOL(pcmcia_register_driver);
 319
 320 /**
 321  * pcmcia_unregister_driver - unregister a PCMCIA driver with the bus core
 322  * @driver: the &driver being unregistered
 323  */
 324 void pcmcia_unregister_driver(struct pcmcia_driver *driver)
 325 {
 326         ds_dbg(3, "unregistering driver %s\n", driver->drv.name);
 327         driver_unregister(&driver->drv);
 328         pcmcia_free_dynids(driver);
 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_function(struct kref *ref)
 351 {
 352         struct config_t *c = container_of(ref, struct config_t, ref);
 353         ds_dbg(1, "releasing config_t\n");
 354         kfree(c);
 355 }
 356
 357 static void pcmcia_release_dev(struct device *dev)
 358 {
 359         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 360         ds_dev_dbg(1, dev, "releasing device\n");
 361         pcmcia_put_socket(p_dev->socket);
 362         kfree(p_dev->devname);
 363         kref_put(&p_dev->function_config->ref, pcmcia_release_function);
 364         kfree(p_dev);
 365 }
 366
 367 static void pcmcia_add_device_later(struct pcmcia_socket *s, int mfc)
 368 {
 369         if (!s->pcmcia_state.device_add_pending) {
 370                 ds_dev_dbg(1, &s->dev, "scheduling to add %s secondary"
 371                        " device to %d\n", mfc ? "mfc" : "pfc", s->sock);
 372                 s->pcmcia_state.device_add_pending = 1;
 373                 s->pcmcia_state.mfc_pfc = mfc;
 374                 schedule_work(&s->device_add);
 375         }
 376         return;
 377 }
 378
 379 static int pcmcia_device_probe(struct device * dev)
 380 {
 381         struct pcmcia_device *p_dev;
 382         struct pcmcia_driver *p_drv;
 383         struct pcmcia_device_id *did;
 384         struct pcmcia_socket *s;
 385         cistpl_config_t cis_config;
 386         int ret = 0;
 387
 388         dev = get_device(dev);
 389         if (!dev)
 390                 return -ENODEV;
 391
 392         p_dev = to_pcmcia_dev(dev);
 393         p_drv = to_pcmcia_drv(dev->driver);
 394         s = p_dev->socket;
 395
 396         /* The PCMCIA code passes the match data in via dev_set_drvdata(dev)
 397          * which is an ugly hack. Once the driver probe is called it may
 398          * and often will overwrite the match data so we must save it first
 399          *
 400          * handle pseudo multifunction devices:
 401          * there are at most two pseudo multifunction devices.
 402          * if we're matching against the first, schedule a
 403          * call which will then check whether there are two
 404          * pseudo devices, and if not, add the second one.
 405          */
 406         did = dev_get_drvdata(&p_dev->dev);
 407
 408         ds_dev_dbg(1, dev, "trying to bind to %s\n", p_drv->drv.name);
 409
 410         if ((!p_drv->probe) || (!p_dev->function_config) ||
 411             (!try_module_get(p_drv->owner))) {
 412                 ret = -EINVAL;
 413                 goto put_dev;
 414         }
 415
 416         /* set up some more device information */
 417         ret = pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_CONFIG,
 418                                 &cis_config);
 419         if (!ret) {
 420                 p_dev->conf.ConfigBase = cis_config.base;
 421                 p_dev->conf.Present = cis_config.rmask[0];
 422         } else {
 423                 dev_printk(KERN_INFO, dev,
 424                            "pcmcia: could not parse base and rmask0 of CIS\n");
 425                 p_dev->conf.ConfigBase = 0;
 426                 p_dev->conf.Present = 0;
 427         }
 428
 429         ret = p_drv->probe(p_dev);
 430         if (ret) {
 431                 ds_dev_dbg(1, dev, "binding to %s failed with %d\n",
 432                            p_drv->drv.name, ret);
 433                 goto put_module;
 434         }
 435
 436         if (did && (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) &&
 437             (p_dev->socket->device_count == 1) && (p_dev->device_no == 0))
 438                 pcmcia_add_device_later(p_dev->socket, 0);
 439
 440 put_module:
 441         if (ret)
 442                 module_put(p_drv->owner);
 443 put_dev:
 444         if (ret)
 445                 put_device(dev);
 446         return (ret);
 447 }
 448
 449
 450 /*
 451  * Removes a PCMCIA card from the device tree and socket list.
 452  */
 453 static void pcmcia_card_remove(struct pcmcia_socket *s, struct pcmcia_device *leftover)
 454 {
 455         struct pcmcia_device    *p_dev;
 456         struct pcmcia_device    *tmp;
 457         unsigned long           flags;
 458
 459         ds_dev_dbg(2, leftover ? &leftover->dev : &s->dev,
 460                    "pcmcia_card_remove(%d) %s\n", s->sock,
 461                    leftover ? leftover->devname : "");
 462
 463         if (!leftover)
 464                 s->device_count = 0;
 465         else
 466                 s->device_count = 1;
 467
 468         /* unregister all pcmcia_devices registered with this socket, except leftover */
 469         list_for_each_entry_safe(p_dev, tmp, &s->devices_list, socket_device_list) {
 470                 if (p_dev == leftover)
 471                         continue;
 472
 473                 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 474                 list_del(&p_dev->socket_device_list);
 475                 p_dev->_removed=1;
 476                 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 477
 478                 ds_dev_dbg(2, &p_dev->dev, "unregistering device\n");
 479                 device_unregister(&p_dev->dev);
 480         }
 481
 482         return;
 483 }
 484
 485 static int pcmcia_device_remove(struct device * dev)
 486 {
 487         struct pcmcia_device *p_dev;
 488         struct pcmcia_driver *p_drv;
 489         struct pcmcia_device_id *did;
 490         int i;
 491
 492         p_dev = to_pcmcia_dev(dev);
 493         p_drv = to_pcmcia_drv(dev->driver);
 494
 495         ds_dev_dbg(1, dev, "removing device\n");
 496
 497         /* If we're removing the primary module driving a
 498          * pseudo multi-function card, we need to unbind
 499          * all devices
 500          */
 501         did = dev_get_drvdata(&p_dev->dev);
 502         if (did && (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) &&
 503             (p_dev->socket->device_count != 0) &&
 504             (p_dev->device_no == 0))
 505                 pcmcia_card_remove(p_dev->socket, p_dev);
 506
 507         /* detach the "instance" */
 508         if (!p_drv)
 509                 return 0;
 510
 511         if (p_drv->remove)
 512                 p_drv->remove(p_dev);
 513
 514         p_dev->dev_node = NULL;
 515
 516         /* check for proper unloading */
 517         if (p_dev->_irq || p_dev->_io || p_dev->_locked)
 518                 dev_printk(KERN_INFO, dev,
 519                         "pcmcia: driver %s did not release config properly\n",
 520                         p_drv->drv.name);
 521
 522         for (i = 0; i < MAX_WIN; i++)
 523                 if (p_dev->_win & CLIENT_WIN_REQ(i))
 524                         dev_printk(KERN_INFO, dev,
 525                           "pcmcia: driver %s did not release window properly\n",
 526                            p_drv->drv.name);
 527
 528         /* references from pcmcia_probe_device */
 529         pcmcia_put_dev(p_dev);
 530         module_put(p_drv->owner);
 531
 532         return 0;
 533 }
 534
 535
 536 /*
 537  * pcmcia_device_query -- determine information about a pcmcia device
 538  */
 539 static int pcmcia_device_query(struct pcmcia_device *p_dev)
 540 {
 541         cistpl_manfid_t manf_id;
 542         cistpl_funcid_t func_id;
 543         cistpl_vers_1_t *vers1;
 544         unsigned int i;
 545
 546         vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL);
 547         if (!vers1)
 548                 return -ENOMEM;
 549
 550         if (!pccard_read_tuple(p_dev->socket, BIND_FN_ALL,
 551                                CISTPL_MANFID, &manf_id)) {
 552                 p_dev->manf_id = manf_id.manf;
 553                 p_dev->card_id = manf_id.card;
 554                 p_dev->has_manf_id = 1;
 555                 p_dev->has_card_id = 1;
 556         }
 557
 558         if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 559                                CISTPL_FUNCID, &func_id)) {
 560                 p_dev->func_id = func_id.func;
 561                 p_dev->has_func_id = 1;
 562         } else {
 563                 /* rule of thumb: cards with no FUNCID, but with
 564                  * common memory device geometry information, are
 565                  * probably memory cards (from pcmcia-cs) */
 566                 cistpl_device_geo_t *devgeo;
 567
 568                 devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL);
 569                 if (!devgeo) {
 570                         kfree(vers1);
 571                         return -ENOMEM;
 572                 }
 573                 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 574                                       CISTPL_DEVICE_GEO, devgeo)) {
 575                         ds_dev_dbg(0, &p_dev->dev,
 576                                    "mem device geometry probably means "
 577                                    "FUNCID_MEMORY\n");
 578                         p_dev->func_id = CISTPL_FUNCID_MEMORY;
 579                         p_dev->has_func_id = 1;
 580                 }
 581                 kfree(devgeo);
 582         }
 583
 584         if (!pccard_read_tuple(p_dev->socket, BIND_FN_ALL, CISTPL_VERS_1,
 585                                vers1)) {
 586                 for (i = 0; i < min_t(unsigned int, 4, vers1->ns); i++) {
 587                         char *tmp;
 588                         unsigned int length;
 589
 590                         tmp = vers1->str + vers1->ofs[i];
 591
 592                         length = strlen(tmp) + 1;
 593                         if ((length < 2) || (length > 255))
 594                                 continue;
 595
 596                         p_dev->prod_id[i] = kmalloc(sizeof(char) * length,
 597                                                     GFP_KERNEL);
 598                         if (!p_dev->prod_id[i])
 599                                 continue;
 600
 601                         p_dev->prod_id[i] = strncpy(p_dev->prod_id[i],
 602                                                     tmp, length);
 603                 }
 604         }
 605
 606         kfree(vers1);
 607         return 0;
 608 }
 609
 610
 611 /* device_add_lock is needed to avoid double registration by cardmgr and kernel.
 612  * Serializes pcmcia_device_add; will most likely be removed in future.
 613  *
 614  * While it has the caveat that adding new PCMCIA devices inside(!) device_register()
 615  * won't work, this doesn't matter much at the moment: the driver core doesn't
 616  * support it either.
 617  */
 618 static DEFINE_MUTEX(device_add_lock);
 619
 620 struct pcmcia_device * pcmcia_device_add(struct pcmcia_socket *s, unsigned int function)
 621 {
 622         struct pcmcia_device *p_dev, *tmp_dev;
 623         unsigned long flags;
 624
 625         s = pcmcia_get_socket(s);
 626         if (!s)
 627                 return NULL;
 628
 629         mutex_lock(&device_add_lock);
 630
 631         ds_dbg(3, "adding device to %d, function %d\n", s->sock, function);
 632
 633         /* max of 4 devices per card */
 634         if (s->device_count == 4)
 635                 goto err_put;
 636
 637         p_dev = kzalloc(sizeof(struct pcmcia_device), GFP_KERNEL);
 638         if (!p_dev)
 639                 goto err_put;
 640
 641         p_dev->socket = s;
 642         p_dev->device_no = (s->device_count++);
 643         p_dev->func   = function;
 644
 645         p_dev->dev.bus = &pcmcia_bus_type;
 646         p_dev->dev.parent = s->dev.parent;
 647         p_dev->dev.release = pcmcia_release_dev;
 648         /* by default don't allow DMA */
 649         p_dev->dma_mask = DMA_MASK_NONE;
 650         p_dev->dev.dma_mask = &p_dev->dma_mask;
 651         dev_set_name(&p_dev->dev, "%d.%d", p_dev->socket->sock, p_dev->device_no);
 652         if (!dev_name(&p_dev->dev))
 653                 goto err_free;
 654         p_dev->devname = kasprintf(GFP_KERNEL, "pcmcia%s", dev_name(&p_dev->dev));
 655         if (!p_dev->devname)
 656                 goto err_free;
 657         ds_dev_dbg(3, &p_dev->dev, "devname is %s\n", p_dev->devname);
 658
 659         spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 660
 661         /*
 662          * p_dev->function_config must be the same for all card functions.
 663          * Note that this is serialized by the device_add_lock, so that
 664          * only one such struct will be created.
 665          */
 666         list_for_each_entry(tmp_dev, &s->devices_list, socket_device_list)
 667                 if (p_dev->func == tmp_dev->func) {
 668                         p_dev->function_config = tmp_dev->function_config;
 669                         p_dev->io = tmp_dev->io;
 670                         p_dev->irq = tmp_dev->irq;
 671                         kref_get(&p_dev->function_config->ref);
 672                 }
 673
 674         /* Add to the list in pcmcia_bus_socket */
 675         list_add(&p_dev->socket_device_list, &s->devices_list);
 676
 677         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 678
 679         if (!p_dev->function_config) {
 680                 ds_dev_dbg(3, &p_dev->dev, "creating config_t\n");
 681                 p_dev->function_config = kzalloc(sizeof(struct config_t),
 682                                                  GFP_KERNEL);
 683                 if (!p_dev->function_config)
 684                         goto err_unreg;
 685                 kref_init(&p_dev->function_config->ref);
 686         }
 687
 688         dev_printk(KERN_NOTICE, &p_dev->dev,
 689                    "pcmcia: registering new device %s\n",
 690                    p_dev->devname);
 691
 692         pcmcia_device_query(p_dev);
 693
 694         if (device_register(&p_dev->dev))
 695                 goto err_unreg;
 696
 697         mutex_unlock(&device_add_lock);
 698
 699         return p_dev;
 700
 701  err_unreg:
 702         spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 703         list_del(&p_dev->socket_device_list);
 704         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 705
 706  err_free:
 707         kfree(p_dev->devname);
 708         kfree(p_dev);
 709         s->device_count--;
 710  err_put:
 711         mutex_unlock(&device_add_lock);
 712         pcmcia_put_socket(s);
 713
 714         return NULL;
 715 }
 716
 717
 718 static int pcmcia_card_add(struct pcmcia_socket *s)
 719 {
 720         cistpl_longlink_mfc_t mfc;
 721         unsigned int no_funcs, i, no_chains;
 722         int ret = 0;
 723
 724         if (!(s->resource_setup_done)) {
 725                 ds_dev_dbg(3, &s->dev,
 726                            "no resources available, delaying card_add\n");
 727                 return -EAGAIN; /* try again, but later... */
 728         }
 729
 730         if (pcmcia_validate_mem(s)) {
 731                 ds_dev_dbg(3, &s->dev, "validating mem resources failed, "
 732                        "delaying card_add\n");
 733                 return -EAGAIN; /* try again, but later... */
 734         }
 735
 736         ret = pccard_validate_cis(s, &no_chains);
 737         if (ret || !no_chains) {
 738                 ds_dev_dbg(0, &s->dev, "invalid CIS or invalid resources\n");
 739                 return -ENODEV;
 740         }
 741
 742         if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
 743                 no_funcs = mfc.nfn;
 744         else
 745                 no_funcs = 1;
 746         s->functions = no_funcs;
 747
 748         for (i=0; i < no_funcs; i++)
 749                 pcmcia_device_add(s, i);
 750
 751         return (ret);
 752 }
 753
 754
 755 static void pcmcia_delayed_add_device(struct work_struct *work)
 756 {
 757         struct pcmcia_socket *s =
 758                 container_of(work, struct pcmcia_socket, device_add);
 759         ds_dev_dbg(1, &s->dev, "adding additional device to %d\n", s->sock);
 760         pcmcia_device_add(s, s->pcmcia_state.mfc_pfc);
 761         s->pcmcia_state.device_add_pending = 0;
 762         s->pcmcia_state.mfc_pfc = 0;
 763 }
 764
 765 static int pcmcia_requery(struct device *dev, void * _data)
 766 {
 767         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 768         if (!p_dev->dev.driver) {
 769                 ds_dev_dbg(1, dev, "update device information\n");
 770                 pcmcia_device_query(p_dev);
 771         }
 772
 773         return 0;
 774 }
 775
 776 static void pcmcia_bus_rescan(struct pcmcia_socket *skt, int new_cis)
 777 {
 778         int no_devices = 0;
 779         int ret = 0;
 780         unsigned long flags;
 781
 782         /* must be called with skt_mutex held */
 783         ds_dev_dbg(0, &skt->dev, "re-scanning socket %d\n", skt->sock);
 784
 785         spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 786         if (list_empty(&skt->devices_list))
 787                 no_devices = 1;
 788         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 789
 790         /* If this is because of a CIS override, start over */
 791         if (new_cis && !no_devices)
 792                 pcmcia_card_remove(skt, NULL);
 793
 794         /* if no devices were added for this socket yet because of
 795          * missing resource information or other trouble, we need to
 796          * do this now. */
 797         if (no_devices || new_cis) {
 798                 ret = pcmcia_card_add(skt);
 799                 if (ret)
 800                         return;
 801         }
 802
 803         /* some device information might have changed because of a CIS
 804          * update or because we can finally read it correctly... so
 805          * determine it again, overwriting old values if necessary. */
 806         bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery);
 807
 808         /* we re-scan all devices, not just the ones connected to this
 809          * socket. This does not matter, though. */
 810         ret = bus_rescan_devices(&pcmcia_bus_type);
 811         if (ret)
 812                 printk(KERN_INFO "pcmcia: bus_rescan_devices failed\n");
 813 }
 814
 815 #ifdef CONFIG_PCMCIA_LOAD_CIS
 816
 817 /**
 818  * pcmcia_load_firmware - load CIS from userspace if device-provided is broken
 819  * @dev: the pcmcia device which needs a CIS override
 820  * @filename: requested filename in /lib/firmware/
 821  *
 822  * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if
 823  * the one provided by the card is broken. The firmware files reside in
 824  * /lib/firmware/ in userspace.
 825  */
 826 static int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
 827 {
 828         struct pcmcia_socket *s = dev->socket;
 829         const struct firmware *fw;
 830         int ret = -ENOMEM;
 831         int no_funcs;
 832         int old_funcs;
 833         cistpl_longlink_mfc_t mfc;
 834
 835         if (!filename)
 836                 return -EINVAL;
 837
 838         ds_dev_dbg(1, &dev->dev, "trying to load CIS file %s\n", filename);
 839
 840         if (request_firmware(&fw, filename, &dev->dev) == 0) {
 841                 if (fw->size >= CISTPL_MAX_CIS_SIZE) {
 842                         ret = -EINVAL;
 843                         dev_printk(KERN_ERR, &dev->dev,
 844                                    "pcmcia: CIS override is too big\n");
 845                         goto release;
 846                 }
 847
 848                 if (!pcmcia_replace_cis(s, fw->data, fw->size))
 849                         ret = 0;
 850                 else {
 851                         dev_printk(KERN_ERR, &dev->dev,
 852                                    "pcmcia: CIS override failed\n");
 853                         goto release;
 854                 }
 855
 856
 857                 /* update information */
 858                 pcmcia_device_query(dev);
 859
 860                 /* does this cis override add or remove functions? */
 861                 old_funcs = s->functions;
 862
 863                 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
 864                         no_funcs = mfc.nfn;
 865                 else
 866                         no_funcs = 1;
 867                 s->functions = no_funcs;
 868
 869                 if (old_funcs > no_funcs)
 870                         pcmcia_card_remove(s, dev);
 871                 else if (no_funcs > old_funcs)
 872                         pcmcia_add_device_later(s, 1);
 873         }
 874  release:
 875         release_firmware(fw);
 876
 877         return (ret);
 878 }
 879
 880 #else /* !CONFIG_PCMCIA_LOAD_CIS */
 881
 882 static inline int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
 883 {
 884         return -ENODEV;
 885 }
 886
 887 #endif
 888
 889
 890 static inline int pcmcia_devmatch(struct pcmcia_device *dev,
 891                                   struct pcmcia_device_id *did)
 892 {
 893         if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
 894                 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
 895                         return 0;
 896         }
 897
 898         if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
 899                 if ((!dev->has_card_id) || (dev->card_id != did->card_id))
 900                         return 0;
 901         }
 902
 903         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
 904                 if (dev->func != did->function)
 905                         return 0;
 906         }
 907
 908         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
 909                 if (!dev->prod_id[0])
 910                         return 0;
 911                 if (strcmp(did->prod_id[0], dev->prod_id[0]))
 912                         return 0;
 913         }
 914
 915         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
 916                 if (!dev->prod_id[1])
 917                         return 0;
 918                 if (strcmp(did->prod_id[1], dev->prod_id[1]))
 919                         return 0;
 920         }
 921
 922         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
 923                 if (!dev->prod_id[2])
 924                         return 0;
 925                 if (strcmp(did->prod_id[2], dev->prod_id[2]))
 926                         return 0;
 927         }
 928
 929         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
 930                 if (!dev->prod_id[3])
 931                         return 0;
 932                 if (strcmp(did->prod_id[3], dev->prod_id[3]))
 933                         return 0;
 934         }
 935
 936         if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
 937                 if (dev->device_no != did->device_no)
 938                         return 0;
 939         }
 940
 941         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
 942                 if ((!dev->has_func_id) || (dev->func_id != did->func_id))
 943                         return 0;
 944
 945                 /* if this is a pseudo-multi-function device,
 946                  * we need explicit matches */
 947                 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO)
 948                         return 0;
 949                 if (dev->device_no)
 950                         return 0;
 951
 952                 /* also, FUNC_ID matching needs to be activated by userspace
 953                  * after it has re-checked that there is no possible module
 954                  * with a prod_id/manf_id/card_id match.
 955                  */
 956                 ds_dev_dbg(0, &dev->dev,
 957                         "skipping FUNC_ID match until userspace interaction\n");
 958                 if (!dev->allow_func_id_match)
 959                         return 0;
 960         }
 961
 962         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
 963                 ds_dev_dbg(0, &dev->dev, "device needs a fake CIS\n");
 964                 if (!dev->socket->fake_cis)
 965                         pcmcia_load_firmware(dev, did->cisfile);
 966
 967                 if (!dev->socket->fake_cis)
 968                         return 0;
 969         }
 970
 971         if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
 972                 int i;
 973                 for (i=0; i<4; i++)
 974                         if (dev->prod_id[i])
 975                                 return 0;
 976                 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
 977                         return 0;
 978         }
 979
 980         dev_set_drvdata(&dev->dev, did);
 981
 982         return 1;
 983 }
 984
 985
 986 static int pcmcia_bus_match(struct device * dev, struct device_driver * drv) {
 987         struct pcmcia_device * p_dev = to_pcmcia_dev(dev);
 988         struct pcmcia_driver * p_drv = to_pcmcia_drv(drv);
 989         struct pcmcia_device_id *did = p_drv->id_table;
 990         struct pcmcia_dynid *dynid;
 991
 992         /* match dynamic devices first */
 993         spin_lock(&p_drv->dynids.lock);
 994         list_for_each_entry(dynid, &p_drv->dynids.list, node) {
 995                 ds_dev_dbg(3, dev, "trying to match to %s\n", drv->name);
 996                 if (pcmcia_devmatch(p_dev, &dynid->id)) {
 997                         ds_dev_dbg(0, dev, "matched to %s\n", drv->name);
 998                         spin_unlock(&p_drv->dynids.lock);
 999                         return 1;
1000                 }
1001         }
1002         spin_unlock(&p_drv->dynids.lock);
1003
1004 #ifdef CONFIG_PCMCIA_IOCTL
1005         /* matching by cardmgr */
1006         if (p_dev->cardmgr == p_drv) {
1007                 ds_dev_dbg(0, dev, "cardmgr matched to %s\n", drv->name);
1008                 return 1;
1009         }
1010 #endif
1011
1012         while (did && did->match_flags) {
1013                 ds_dev_dbg(3, dev, "trying to match to %s\n", drv->name);
1014                 if (pcmcia_devmatch(p_dev, did)) {
1015                         ds_dev_dbg(0, dev, "matched to %s\n", drv->name);
1016                         return 1;
1017                 }
1018                 did++;
1019         }
1020
1021         return 0;
1022 }
1023
1024 #ifdef CONFIG_HOTPLUG
1025
1026 static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
1027 {
1028         struct pcmcia_device *p_dev;
1029         int i;
1030         u32 hash[4] = { 0, 0, 0, 0};
1031
1032         if (!dev)
1033                 return -ENODEV;
1034
1035         p_dev = to_pcmcia_dev(dev);
1036
1037         /* calculate hashes */
1038         for (i=0; i<4; i++) {
1039                 if (!p_dev->prod_id[i])
1040                         continue;
1041                 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
1042         }
1043
1044         if (add_uevent_var(env, "SOCKET_NO=%u", p_dev->socket->sock))
1045                 return -ENOMEM;
1046
1047         if (add_uevent_var(env, "DEVICE_NO=%02X", p_dev->device_no))
1048                 return -ENOMEM;
1049
1050         if (add_uevent_var(env, "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
1051                            "pa%08Xpb%08Xpc%08Xpd%08X",
1052                            p_dev->has_manf_id ? p_dev->manf_id : 0,
1053                            p_dev->has_card_id ? p_dev->card_id : 0,
1054                            p_dev->has_func_id ? p_dev->func_id : 0,
1055                            p_dev->func,
1056                            p_dev->device_no,
1057                            hash[0],
1058                            hash[1],
1059                            hash[2],
1060                            hash[3]))
1061                 return -ENOMEM;
1062
1063         return 0;
1064 }
1065
1066 #else
1067
1068 static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
1069 {
1070         return -ENODEV;
1071 }
1072
1073 #endif
1074
1075 /************************ runtime PM support ***************************/
1076
1077 static int pcmcia_dev_suspend(struct device *dev, pm_message_t state);
1078 static int pcmcia_dev_resume(struct device *dev);
1079
1080 static int runtime_suspend(struct device *dev)
1081 {
1082         int rc;
1083
1084         down(&dev->sem);
1085         rc = pcmcia_dev_suspend(dev, PMSG_SUSPEND);
1086         up(&dev->sem);
1087         return rc;
1088 }
1089
1090 static void runtime_resume(struct device *dev)
1091 {
1092         int rc;
1093
1094         down(&dev->sem);
1095         rc = pcmcia_dev_resume(dev);
1096         up(&dev->sem);
1097 }
1098
1099 /************************ per-device sysfs output ***************************/
1100
1101 #define pcmcia_device_attr(field, test, format)                         \
1102 static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf)              \
1103 {                                                                       \
1104         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);               \
1105         return p_dev->test ? sprintf (buf, format, p_dev->field) : -ENODEV; \
1106 }
1107
1108 #define pcmcia_device_stringattr(name, field)                                   \
1109 static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf)               \
1110 {                                                                       \
1111         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);               \
1112         return p_dev->field ? sprintf (buf, "%s\n", p_dev->field) : -ENODEV; \
1113 }
1114
1115 pcmcia_device_attr(func, socket, "0x%02x\n");
1116 pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
1117 pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
1118 pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
1119 pcmcia_device_stringattr(prod_id1, prod_id[0]);
1120 pcmcia_device_stringattr(prod_id2, prod_id[1]);
1121 pcmcia_device_stringattr(prod_id3, prod_id[2]);
1122 pcmcia_device_stringattr(prod_id4, prod_id[3]);
1123
1124
1125 static ssize_t pcmcia_show_pm_state(struct device *dev, struct device_attribute *attr, char *buf)
1126 {
1127         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1128
1129         if (p_dev->suspended)
1130                 return sprintf(buf, "off\n");
1131         else
1132                 return sprintf(buf, "on\n");
1133 }
1134
1135 static ssize_t pcmcia_store_pm_state(struct device *dev, struct device_attribute *attr,
1136                                      const char *buf, size_t count)
1137 {
1138         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1139         int ret = 0;
1140
1141         if (!count)
1142                 return -EINVAL;
1143
1144         if ((!p_dev->suspended) && !strncmp(buf, "off", 3))
1145                 ret = runtime_suspend(dev);
1146         else if (p_dev->suspended && !strncmp(buf, "on", 2))
1147                 runtime_resume(dev);
1148
1149         return ret ? ret : count;
1150 }
1151
1152
1153 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1154 {
1155         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1156         int i;
1157         u32 hash[4] = { 0, 0, 0, 0};
1158
1159         /* calculate hashes */
1160         for (i=0; i<4; i++) {
1161                 if (!p_dev->prod_id[i])
1162                         continue;
1163                 hash[i] = crc32(0,p_dev->prod_id[i],strlen(p_dev->prod_id[i]));
1164         }
1165         return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
1166                                 "pa%08Xpb%08Xpc%08Xpd%08X\n",
1167                                 p_dev->has_manf_id ? p_dev->manf_id : 0,
1168                                 p_dev->has_card_id ? p_dev->card_id : 0,
1169                                 p_dev->has_func_id ? p_dev->func_id : 0,
1170                                 p_dev->func, p_dev->device_no,
1171                                 hash[0], hash[1], hash[2], hash[3]);
1172 }
1173
1174 static ssize_t pcmcia_store_allow_func_id_match(struct device *dev,
1175                 struct device_attribute *attr, const char *buf, size_t count)
1176 {
1177         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1178         int ret;
1179
1180         if (!count)
1181                 return -EINVAL;
1182
1183         mutex_lock(&p_dev->socket->skt_mutex);
1184         p_dev->allow_func_id_match = 1;
1185         mutex_unlock(&p_dev->socket->skt_mutex);
1186
1187         ret = bus_rescan_devices(&pcmcia_bus_type);
1188         if (ret)
1189                 printk(KERN_INFO "pcmcia: bus_rescan_devices failed after "
1190                        "allowing func_id matches\n");
1191
1192         return count;
1193 }
1194
1195 static struct device_attribute pcmcia_dev_attrs[] = {
1196         __ATTR(function, 0444, func_show, NULL),
1197         __ATTR(pm_state, 0644, pcmcia_show_pm_state, pcmcia_store_pm_state),
1198         __ATTR_RO(func_id),
1199         __ATTR_RO(manf_id),
1200         __ATTR_RO(card_id),
1201         __ATTR_RO(prod_id1),
1202         __ATTR_RO(prod_id2),
1203         __ATTR_RO(prod_id3),
1204         __ATTR_RO(prod_id4),
1205         __ATTR_RO(modalias),
1206         __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match),
1207         __ATTR_NULL,
1208 };
1209
1210 /* PM support, also needed for reset */
1211
1212 static int pcmcia_dev_suspend(struct device * dev, pm_message_t state)
1213 {
1214         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1215         struct pcmcia_driver *p_drv = NULL;
1216         int ret = 0;
1217
1218         if (p_dev->suspended)
1219                 return 0;
1220
1221         ds_dev_dbg(2, dev, "suspending\n");
1222
1223         if (dev->driver)
1224                 p_drv = to_pcmcia_drv(dev->driver);
1225
1226         if (!p_drv)
1227                 goto out;
1228
1229         if (p_drv->suspend) {
1230                 ret = p_drv->suspend(p_dev);
1231                 if (ret) {
1232                         dev_printk(KERN_ERR, dev,
1233                                    "pcmcia: device %s (driver %s) did "
1234                                    "not want to go to sleep (%d)\n",
1235                                    p_dev->devname, p_drv->drv.name, ret);
1236                         goto out;
1237                 }
1238         }
1239
1240         if (p_dev->device_no == p_dev->func) {
1241                 ds_dev_dbg(2, dev, "releasing configuration\n");
1242                 pcmcia_release_configuration(p_dev);
1243         }
1244
1245  out:
1246         if (!ret)
1247                 p_dev->suspended = 1;
1248         return ret;
1249 }
1250
1251
1252 static int pcmcia_dev_resume(struct device * dev)
1253 {
1254         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1255         struct pcmcia_driver *p_drv = NULL;
1256         int ret = 0;
1257
1258         if (!p_dev->suspended)
1259                 return 0;
1260
1261         ds_dev_dbg(2, dev, "resuming\n");
1262
1263         if (dev->driver)
1264                 p_drv = to_pcmcia_drv(dev->driver);
1265
1266         if (!p_drv)
1267                 goto out;
1268
1269         if (p_dev->device_no == p_dev->func) {
1270                 ds_dev_dbg(2, dev, "requesting configuration\n");
1271                 ret = pcmcia_request_configuration(p_dev, &p_dev->conf);
1272                 if (ret)
1273                         goto out;
1274         }
1275
1276         if (p_drv->resume)
1277                 ret = p_drv->resume(p_dev);
1278
1279  out:
1280         if (!ret)
1281                 p_dev->suspended = 0;
1282         return ret;
1283 }
1284
1285
1286 static int pcmcia_bus_suspend_callback(struct device *dev, void * _data)
1287 {
1288         struct pcmcia_socket *skt = _data;
1289         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1290
1291         if (p_dev->socket != skt || p_dev->suspended)
1292                 return 0;
1293
1294         return runtime_suspend(dev);
1295 }
1296
1297 static int pcmcia_bus_resume_callback(struct device *dev, void * _data)
1298 {
1299         struct pcmcia_socket *skt = _data;
1300         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1301
1302         if (p_dev->socket != skt || !p_dev->suspended)
1303                 return 0;
1304
1305         runtime_resume(dev);
1306
1307         return 0;
1308 }
1309
1310 static int pcmcia_bus_resume(struct pcmcia_socket *skt)
1311 {
1312         ds_dev_dbg(2, &skt->dev, "resuming socket %d\n", skt->sock);
1313         bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback);
1314         return 0;
1315 }
1316
1317 static int pcmcia_bus_suspend(struct pcmcia_socket *skt)
1318 {
1319         ds_dev_dbg(2, &skt->dev, "suspending socket %d\n", skt->sock);
1320         if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt,
1321                              pcmcia_bus_suspend_callback)) {
1322                 pcmcia_bus_resume(skt);
1323                 return -EIO;
1324         }
1325         return 0;
1326 }
1327
1328
1329 /*======================================================================
1330
1331     The card status event handler.
1332
1333 ======================================================================*/
1334
1335 /* Normally, the event is passed to individual drivers after
1336  * informing userspace. Only for CS_EVENT_CARD_REMOVAL this
1337  * is inversed to maintain historic compatibility.
1338  */
1339
1340 static int ds_event(struct pcmcia_socket *skt, event_t event, int priority)
1341 {
1342         struct pcmcia_socket *s = pcmcia_get_socket(skt);
1343
1344         if (!s) {
1345                 dev_printk(KERN_ERR, &skt->dev,
1346                            "PCMCIA obtaining reference to socket "      \
1347                            "failed, event 0x%x lost!\n", event);
1348                 return -ENODEV;
1349         }
1350
1351         ds_dev_dbg(1, &skt->dev, "ds_event(0x%06x, %d, 0x%p)\n",
1352                    event, priority, skt);
1353
1354         switch (event) {
1355         case CS_EVENT_CARD_REMOVAL:
1356                 s->pcmcia_state.present = 0;
1357                 pcmcia_card_remove(skt, NULL);
1358                 handle_event(skt, event);
1359                 break;
1360
1361         case CS_EVENT_CARD_INSERTION:
1362                 s->pcmcia_state.present = 1;
1363                 pcmcia_card_add(skt);
1364                 handle_event(skt, event);
1365                 break;
1366
1367         case CS_EVENT_EJECTION_REQUEST:
1368                 break;
1369
1370         case CS_EVENT_PM_SUSPEND:
1371         case CS_EVENT_PM_RESUME:
1372         case CS_EVENT_RESET_PHYSICAL:
1373         case CS_EVENT_CARD_RESET:
1374         default:
1375                 handle_event(skt, event);
1376                 break;
1377     }
1378
1379     pcmcia_put_socket(s);
1380
1381     return 0;
1382 } /* ds_event */
1383
1384
1385 struct pcmcia_device * pcmcia_dev_present(struct pcmcia_device *_p_dev)
1386 {
1387         struct pcmcia_device *p_dev;
1388         struct pcmcia_device *ret = NULL;
1389
1390         p_dev = pcmcia_get_dev(_p_dev);
1391         if (!p_dev)
1392                 return NULL;
1393
1394         if (!p_dev->socket->pcmcia_state.present)
1395                 goto out;
1396
1397         if (p_dev->_removed)
1398                 goto out;
1399
1400         if (p_dev->suspended)
1401                 goto out;
1402
1403         ret = p_dev;
1404  out:
1405         pcmcia_put_dev(p_dev);
1406         return ret;
1407 }
1408 EXPORT_SYMBOL(pcmcia_dev_present);
1409
1410
1411 static struct pcmcia_callback pcmcia_bus_callback = {
1412         .owner = THIS_MODULE,
1413         .event = ds_event,
1414         .requery = pcmcia_bus_rescan,
1415         .suspend = pcmcia_bus_suspend,
1416         .resume = pcmcia_bus_resume,
1417 };
1418
1419 static int __devinit pcmcia_bus_add_socket(struct device *dev,
1420                                            struct class_interface *class_intf)
1421 {
1422         struct pcmcia_socket *socket = dev_get_drvdata(dev);
1423         int ret;
1424
1425         socket = pcmcia_get_socket(socket);
1426         if (!socket) {
1427                 dev_printk(KERN_ERR, dev,
1428                            "PCMCIA obtaining reference to socket failed\n");
1429                 return -ENODEV;
1430         }
1431
1432         /*
1433          * Ugly. But we want to wait for the socket threads to have started up.
1434          * We really should let the drivers themselves drive some of this..
1435          */
1436         msleep(250);
1437
1438 #ifdef CONFIG_PCMCIA_IOCTL
1439         init_waitqueue_head(&socket->queue);
1440 #endif
1441         INIT_LIST_HEAD(&socket->devices_list);
1442         INIT_WORK(&socket->device_add, pcmcia_delayed_add_device);
1443         memset(&socket->pcmcia_state, 0, sizeof(u8));
1444         socket->device_count = 0;
1445
1446         ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback);
1447         if (ret) {
1448                 dev_printk(KERN_ERR, dev, "PCMCIA registration failed\n");
1449                 pcmcia_put_socket(socket);
1450                 return (ret);
1451         }
1452
1453         return 0;
1454 }
1455
1456 static void pcmcia_bus_remove_socket(struct device *dev,
1457                                      struct class_interface *class_intf)
1458 {
1459         struct pcmcia_socket *socket = dev_get_drvdata(dev);
1460
1461         if (!socket)
1462                 return;
1463
1464         socket->pcmcia_state.dead = 1;
1465         pccard_register_pcmcia(socket, NULL);
1466
1467         /* unregister any unbound devices */
1468         mutex_lock(&socket->skt_mutex);
1469         pcmcia_card_remove(socket, NULL);
1470         mutex_unlock(&socket->skt_mutex);
1471
1472         pcmcia_put_socket(socket);
1473
1474         return;
1475 }
1476
1477
1478 /* the pcmcia_bus_interface is used to handle pcmcia socket devices */
1479 static struct class_interface pcmcia_bus_interface __refdata = {
1480         .class = &pcmcia_socket_class,
1481         .add_dev = &pcmcia_bus_add_socket,
1482         .remove_dev = &pcmcia_bus_remove_socket,
1483 };
1484
1485
1486 struct bus_type pcmcia_bus_type = {
1487         .name = "pcmcia",
1488         .uevent = pcmcia_bus_uevent,
1489         .match = pcmcia_bus_match,
1490         .dev_attrs = pcmcia_dev_attrs,
1491         .probe = pcmcia_device_probe,
1492         .remove = pcmcia_device_remove,
1493         .suspend = pcmcia_dev_suspend,
1494         .resume = pcmcia_dev_resume,
1495 };
1496
1497
1498 static int __init init_pcmcia_bus(void)
1499 {
1500         int ret;
1501
1502         spin_lock_init(&pcmcia_dev_list_lock);
1503
1504         ret = bus_register(&pcmcia_bus_type);
1505         if (ret < 0) {
1506                 printk(KERN_WARNING "pcmcia: bus_register error: %d\n", ret);
1507                 return ret;
1508         }
1509         ret = class_interface_register(&pcmcia_bus_interface);
1510         if (ret < 0) {
1511                 printk(KERN_WARNING
1512                         "pcmcia: class_interface_register error: %d\n", ret);
1513                 bus_unregister(&pcmcia_bus_type);
1514                 return ret;
1515         }
1516
1517         pcmcia_setup_ioctl();
1518
1519         return 0;
1520 }
1521 fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that
1522                                * pcmcia_socket_class is already registered */
1523
1524
1525 static void __exit exit_pcmcia_bus(void)
1526 {
1527         pcmcia_cleanup_ioctl();
1528
1529         class_interface_unregister(&pcmcia_bus_interface);
1530
1531         bus_unregister(&pcmcia_bus_type);
1532 }
1533 module_exit(exit_pcmcia_bus);
1534
1535
1536 MODULE_ALIAS("ds");