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         INIT_LIST_HEAD(&dynid->node);
 240         dynid->id.match_flags = match_flags;
 241         dynid->id.manf_id = manf_id;
 242         dynid->id.card_id = card_id;
 243         dynid->id.func_id = func_id;
 244         dynid->id.function = function;
 245         dynid->id.device_no = device_no;
 246         memcpy(dynid->id.prod_id_hash, prod_id_hash, sizeof(__u32) * 4);
 247
 248         spin_lock(&pdrv->dynids.lock);
 249         list_add_tail(&pdrv->dynids.list, &dynid->node);
 250         spin_unlock(&pdrv->dynids.lock);
 251
 252         if (get_driver(&pdrv->drv)) {
 253                 retval = driver_attach(&pdrv->drv);
 254                 put_driver(&pdrv->drv);
 255         }
 256
 257         if (retval)
 258                 return retval;
 259         return count;
 260 }
 261 static DRIVER_ATTR(new_id, S_IWUSR, NULL, pcmcia_store_new_id);
 262
 263 static void
 264 pcmcia_free_dynids(struct pcmcia_driver *drv)
 265 {
 266         struct pcmcia_dynid *dynid, *n;
 267
 268         spin_lock(&drv->dynids.lock);
 269         list_for_each_entry_safe(dynid, n, &drv->dynids.list, node) {
 270                 list_del(&dynid->node);
 271                 kfree(dynid);
 272         }
 273         spin_unlock(&drv->dynids.lock);
 274 }
 275
 276 static int
 277 pcmcia_create_newid_file(struct pcmcia_driver *drv)
 278 {
 279         int error = 0;
 280         if (drv->probe != NULL)
 281                 error = driver_create_file(&drv->drv, &driver_attr_new_id);
 282         return error;
 283 }
 284
 285
 286 /**
 287  * pcmcia_register_driver - register a PCMCIA driver with the bus core
 288  * @driver: the &driver being registered
 289  *
 290  * Registers a PCMCIA driver with the PCMCIA bus core.
 291  */
 292 int pcmcia_register_driver(struct pcmcia_driver *driver)
 293 {
 294         int error;
 295
 296         if (!driver)
 297                 return -EINVAL;
 298
 299         pcmcia_check_driver(driver);
 300
 301         /* initialize common fields */
 302         driver->drv.bus = &pcmcia_bus_type;
 303         driver->drv.owner = driver->owner;
 304         spin_lock_init(&driver->dynids.lock);
 305         INIT_LIST_HEAD(&driver->dynids.list);
 306
 307         ds_dbg(3, "registering driver %s\n", driver->drv.name);
 308
 309         error = driver_register(&driver->drv);
 310         if (error < 0)
 311                 return error;
 312
 313         error = pcmcia_create_newid_file(driver);
 314         if (error)
 315                 driver_unregister(&driver->drv);
 316
 317         return error;
 318 }
 319 EXPORT_SYMBOL(pcmcia_register_driver);
 320
 321 /**
 322  * pcmcia_unregister_driver - unregister a PCMCIA driver with the bus core
 323  * @driver: the &driver being unregistered
 324  */
 325 void pcmcia_unregister_driver(struct pcmcia_driver *driver)
 326 {
 327         ds_dbg(3, "unregistering driver %s\n", driver->drv.name);
 328         driver_unregister(&driver->drv);
 329         pcmcia_free_dynids(driver);
 330 }
 331 EXPORT_SYMBOL(pcmcia_unregister_driver);
 332
 333
 334 /* pcmcia_device handling */
 335
 336 struct pcmcia_device * pcmcia_get_dev(struct pcmcia_device *p_dev)
 337 {
 338         struct device *tmp_dev;
 339         tmp_dev = get_device(&p_dev->dev);
 340         if (!tmp_dev)
 341                 return NULL;
 342         return to_pcmcia_dev(tmp_dev);
 343 }
 344
 345 void pcmcia_put_dev(struct pcmcia_device *p_dev)
 346 {
 347         if (p_dev)
 348                 put_device(&p_dev->dev);
 349 }
 350
 351 static void pcmcia_release_function(struct kref *ref)
 352 {
 353         struct config_t *c = container_of(ref, struct config_t, ref);
 354         ds_dbg(1, "releasing config_t\n");
 355         kfree(c);
 356 }
 357
 358 static void pcmcia_release_dev(struct device *dev)
 359 {
 360         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 361         ds_dev_dbg(1, dev, "releasing device\n");
 362         pcmcia_put_socket(p_dev->socket);
 363         kfree(p_dev->devname);
 364         kref_put(&p_dev->function_config->ref, pcmcia_release_function);
 365         kfree(p_dev);
 366 }
 367
 368 static void pcmcia_add_device_later(struct pcmcia_socket *s, int mfc)
 369 {
 370         if (!s->pcmcia_state.device_add_pending) {
 371                 ds_dev_dbg(1, &s->dev, "scheduling to add %s secondary"
 372                        " device to %d\n", mfc ? "mfc" : "pfc", s->sock);
 373                 s->pcmcia_state.device_add_pending = 1;
 374                 s->pcmcia_state.mfc_pfc = mfc;
 375                 schedule_work(&s->device_add);
 376         }
 377         return;
 378 }
 379
 380 static int pcmcia_device_probe(struct device * dev)
 381 {
 382         struct pcmcia_device *p_dev;
 383         struct pcmcia_driver *p_drv;
 384         struct pcmcia_device_id *did;
 385         struct pcmcia_socket *s;
 386         cistpl_config_t cis_config;
 387         int ret = 0;
 388
 389         dev = get_device(dev);
 390         if (!dev)
 391                 return -ENODEV;
 392
 393         p_dev = to_pcmcia_dev(dev);
 394         p_drv = to_pcmcia_drv(dev->driver);
 395         s = p_dev->socket;
 396
 397         ds_dev_dbg(1, dev, "trying to bind to %s\n", p_drv->drv.name);
 398
 399         if ((!p_drv->probe) || (!p_dev->function_config) ||
 400             (!try_module_get(p_drv->owner))) {
 401                 ret = -EINVAL;
 402                 goto put_dev;
 403         }
 404
 405         /* set up some more device information */
 406         ret = pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_CONFIG,
 407                                 &cis_config);
 408         if (!ret) {
 409                 p_dev->conf.ConfigBase = cis_config.base;
 410                 p_dev->conf.Present = cis_config.rmask[0];
 411         } else {
 412                 dev_printk(KERN_INFO, dev,
 413                            "pcmcia: could not parse base and rmask0 of CIS\n");
 414                 p_dev->conf.ConfigBase = 0;
 415                 p_dev->conf.Present = 0;
 416         }
 417
 418         ret = p_drv->probe(p_dev);
 419         if (ret) {
 420                 ds_dev_dbg(1, dev, "binding to %s failed with %d\n",
 421                            p_drv->drv.name, ret);
 422                 goto put_module;
 423         }
 424
 425         /* handle pseudo multifunction devices:
 426          * there are at most two pseudo multifunction devices.
 427          * if we're matching against the first, schedule a
 428          * call which will then check whether there are two
 429          * pseudo devices, and if not, add the second one.
 430          */
 431         did = p_dev->dev.driver_data;
 432         if (did && (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) &&
 433             (p_dev->socket->device_count == 1) && (p_dev->device_no == 0))
 434                 pcmcia_add_device_later(p_dev->socket, 0);
 435
 436  put_module:
 437         if (ret)
 438                 module_put(p_drv->owner);
 439  put_dev:
 440         if (ret)
 441                 put_device(dev);
 442         return (ret);
 443 }
 444
 445
 446 /*
 447  * Removes a PCMCIA card from the device tree and socket list.
 448  */
 449 static void pcmcia_card_remove(struct pcmcia_socket *s, struct pcmcia_device *leftover)
 450 {
 451         struct pcmcia_device    *p_dev;
 452         struct pcmcia_device    *tmp;
 453         unsigned long           flags;
 454
 455         ds_dev_dbg(2, leftover ? &leftover->dev : &s->dev,
 456                    "pcmcia_card_remove(%d) %s\n", s->sock,
 457                    leftover ? leftover->devname : "");
 458
 459         if (!leftover)
 460                 s->device_count = 0;
 461         else
 462                 s->device_count = 1;
 463
 464         /* unregister all pcmcia_devices registered with this socket, except leftover */
 465         list_for_each_entry_safe(p_dev, tmp, &s->devices_list, socket_device_list) {
 466                 if (p_dev == leftover)
 467                         continue;
 468
 469                 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 470                 list_del(&p_dev->socket_device_list);
 471                 p_dev->_removed=1;
 472                 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 473
 474                 ds_dev_dbg(2, &p_dev->dev, "unregistering device\n");
 475                 device_unregister(&p_dev->dev);
 476         }
 477
 478         return;
 479 }
 480
 481 static int pcmcia_device_remove(struct device * dev)
 482 {
 483         struct pcmcia_device *p_dev;
 484         struct pcmcia_driver *p_drv;
 485         struct pcmcia_device_id *did;
 486         int i;
 487
 488         p_dev = to_pcmcia_dev(dev);
 489         p_drv = to_pcmcia_drv(dev->driver);
 490
 491         ds_dev_dbg(1, dev, "removing device\n");
 492
 493         /* If we're removing the primary module driving a
 494          * pseudo multi-function card, we need to unbind
 495          * all devices
 496          */
 497         did = p_dev->dev.driver_data;
 498         if (did && (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) &&
 499             (p_dev->socket->device_count != 0) &&
 500             (p_dev->device_no == 0))
 501                 pcmcia_card_remove(p_dev->socket, p_dev);
 502
 503         /* detach the "instance" */
 504         if (!p_drv)
 505                 return 0;
 506
 507         if (p_drv->remove)
 508                 p_drv->remove(p_dev);
 509
 510         p_dev->dev_node = NULL;
 511
 512         /* check for proper unloading */
 513         if (p_dev->_irq || p_dev->_io || p_dev->_locked)
 514                 dev_printk(KERN_INFO, dev,
 515                         "pcmcia: driver %s did not release config properly\n",
 516                         p_drv->drv.name);
 517
 518         for (i = 0; i < MAX_WIN; i++)
 519                 if (p_dev->_win & CLIENT_WIN_REQ(i))
 520                         dev_printk(KERN_INFO, dev,
 521                           "pcmcia: driver %s did not release window properly\n",
 522                            p_drv->drv.name);
 523
 524         /* references from pcmcia_probe_device */
 525         pcmcia_put_dev(p_dev);
 526         module_put(p_drv->owner);
 527
 528         return 0;
 529 }
 530
 531
 532 /*
 533  * pcmcia_device_query -- determine information about a pcmcia device
 534  */
 535 static int pcmcia_device_query(struct pcmcia_device *p_dev)
 536 {
 537         cistpl_manfid_t manf_id;
 538         cistpl_funcid_t func_id;
 539         cistpl_vers_1_t *vers1;
 540         unsigned int i;
 541
 542         vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL);
 543         if (!vers1)
 544                 return -ENOMEM;
 545
 546         if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 547                                CISTPL_MANFID, &manf_id)) {
 548                 p_dev->manf_id = manf_id.manf;
 549                 p_dev->card_id = manf_id.card;
 550                 p_dev->has_manf_id = 1;
 551                 p_dev->has_card_id = 1;
 552         }
 553
 554         if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 555                                CISTPL_FUNCID, &func_id)) {
 556                 p_dev->func_id = func_id.func;
 557                 p_dev->has_func_id = 1;
 558         } else {
 559                 /* rule of thumb: cards with no FUNCID, but with
 560                  * common memory device geometry information, are
 561                  * probably memory cards (from pcmcia-cs) */
 562                 cistpl_device_geo_t *devgeo;
 563
 564                 devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL);
 565                 if (!devgeo) {
 566                         kfree(vers1);
 567                         return -ENOMEM;
 568                 }
 569                 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 570                                       CISTPL_DEVICE_GEO, devgeo)) {
 571                         ds_dev_dbg(0, &p_dev->dev,
 572                                    "mem device geometry probably means "
 573                                    "FUNCID_MEMORY\n");
 574                         p_dev->func_id = CISTPL_FUNCID_MEMORY;
 575                         p_dev->has_func_id = 1;
 576                 }
 577                 kfree(devgeo);
 578         }
 579
 580         if (!pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_VERS_1,
 581                                vers1)) {
 582                 for (i=0; i < vers1->ns; i++) {
 583                         char *tmp;
 584                         unsigned int length;
 585
 586                         tmp = vers1->str + vers1->ofs[i];
 587
 588                         length = strlen(tmp) + 1;
 589                         if ((length < 2) || (length > 255))
 590                                 continue;
 591
 592                         p_dev->prod_id[i] = kmalloc(sizeof(char) * length,
 593                                                     GFP_KERNEL);
 594                         if (!p_dev->prod_id[i])
 595                                 continue;
 596
 597                         p_dev->prod_id[i] = strncpy(p_dev->prod_id[i],
 598                                                     tmp, length);
 599                 }
 600         }
 601
 602         kfree(vers1);
 603         return 0;
 604 }
 605
 606
 607 /* device_add_lock is needed to avoid double registration by cardmgr and kernel.
 608  * Serializes pcmcia_device_add; will most likely be removed in future.
 609  *
 610  * While it has the caveat that adding new PCMCIA devices inside(!) device_register()
 611  * won't work, this doesn't matter much at the moment: the driver core doesn't
 612  * support it either.
 613  */
 614 static DEFINE_MUTEX(device_add_lock);
 615
 616 struct pcmcia_device * pcmcia_device_add(struct pcmcia_socket *s, unsigned int function)
 617 {
 618         struct pcmcia_device *p_dev, *tmp_dev;
 619         unsigned long flags;
 620         int bus_id_len;
 621
 622         s = pcmcia_get_socket(s);
 623         if (!s)
 624                 return NULL;
 625
 626         mutex_lock(&device_add_lock);
 627
 628         ds_dbg(3, "adding device to %d, function %d\n", s->sock, function);
 629
 630         /* max of 4 devices per card */
 631         if (s->device_count == 4)
 632                 goto err_put;
 633
 634         p_dev = kzalloc(sizeof(struct pcmcia_device), GFP_KERNEL);
 635         if (!p_dev)
 636                 goto err_put;
 637
 638         p_dev->socket = s;
 639         p_dev->device_no = (s->device_count++);
 640         p_dev->func   = function;
 641
 642         p_dev->dev.bus = &pcmcia_bus_type;
 643         p_dev->dev.parent = s->dev.parent;
 644         p_dev->dev.release = pcmcia_release_dev;
 645         /* by default don't allow DMA */
 646         p_dev->dma_mask = DMA_MASK_NONE;
 647         p_dev->dev.dma_mask = &p_dev->dma_mask;
 648         bus_id_len = sprintf (p_dev->dev.bus_id, "%d.%d", p_dev->socket->sock, p_dev->device_no);
 649
 650         p_dev->devname = kmalloc(6 + bus_id_len + 1, GFP_KERNEL);
 651         if (!p_dev->devname)
 652                 goto err_free;
 653         sprintf (p_dev->devname, "pcmcia%s", p_dev->dev.bus_id);
 654         ds_dev_dbg(3, &p_dev->dev, "devname is %s\n", p_dev->devname);
 655
 656         spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 657
 658         /*
 659          * p_dev->function_config must be the same for all card functions.
 660          * Note that this is serialized by the device_add_lock, so that
 661          * only one such struct will be created.
 662          */
 663         list_for_each_entry(tmp_dev, &s->devices_list, socket_device_list)
 664                 if (p_dev->func == tmp_dev->func) {
 665                         p_dev->function_config = tmp_dev->function_config;
 666                         kref_get(&p_dev->function_config->ref);
 667                 }
 668
 669         /* Add to the list in pcmcia_bus_socket */
 670         list_add(&p_dev->socket_device_list, &s->devices_list);
 671
 672         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 673
 674         if (!p_dev->function_config) {
 675                 ds_dev_dbg(3, &p_dev->dev, "creating config_t\n");
 676                 p_dev->function_config = kzalloc(sizeof(struct config_t),
 677                                                  GFP_KERNEL);
 678                 if (!p_dev->function_config)
 679                         goto err_unreg;
 680                 kref_init(&p_dev->function_config->ref);
 681         }
 682
 683         dev_printk(KERN_NOTICE, &p_dev->dev,
 684                    "pcmcia: registering new device %s\n",
 685                    p_dev->devname);
 686
 687         pcmcia_device_query(p_dev);
 688
 689         if (device_register(&p_dev->dev))
 690                 goto err_unreg;
 691
 692         mutex_unlock(&device_add_lock);
 693
 694         return p_dev;
 695
 696  err_unreg:
 697         spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 698         list_del(&p_dev->socket_device_list);
 699         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 700
 701  err_free:
 702         kfree(p_dev->devname);
 703         kfree(p_dev);
 704         s->device_count--;
 705  err_put:
 706         mutex_unlock(&device_add_lock);
 707         pcmcia_put_socket(s);
 708
 709         return NULL;
 710 }
 711
 712
 713 static int pcmcia_card_add(struct pcmcia_socket *s)
 714 {
 715         cistpl_longlink_mfc_t mfc;
 716         unsigned int no_funcs, i, no_chains;
 717         int ret = 0;
 718
 719         if (!(s->resource_setup_done)) {
 720                 ds_dev_dbg(3, &s->dev,
 721                            "no resources available, delaying card_add\n");
 722                 return -EAGAIN; /* try again, but later... */
 723         }
 724
 725         if (pcmcia_validate_mem(s)) {
 726                 ds_dev_dbg(3, &s->dev, "validating mem resources failed, "
 727                        "delaying card_add\n");
 728                 return -EAGAIN; /* try again, but later... */
 729         }
 730
 731         ret = pccard_validate_cis(s, BIND_FN_ALL, &no_chains);
 732         if (ret || !no_chains) {
 733                 ds_dev_dbg(0, &s->dev, "invalid CIS or invalid resources\n");
 734                 return -ENODEV;
 735         }
 736
 737         if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
 738                 no_funcs = mfc.nfn;
 739         else
 740                 no_funcs = 1;
 741         s->functions = no_funcs;
 742
 743         for (i=0; i < no_funcs; i++)
 744                 pcmcia_device_add(s, i);
 745
 746         return (ret);
 747 }
 748
 749
 750 static void pcmcia_delayed_add_device(struct work_struct *work)
 751 {
 752         struct pcmcia_socket *s =
 753                 container_of(work, struct pcmcia_socket, device_add);
 754         ds_dev_dbg(1, &s->dev, "adding additional device to %d\n", s->sock);
 755         pcmcia_device_add(s, s->pcmcia_state.mfc_pfc);
 756         s->pcmcia_state.device_add_pending = 0;
 757         s->pcmcia_state.mfc_pfc = 0;
 758 }
 759
 760 static int pcmcia_requery(struct device *dev, void * _data)
 761 {
 762         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 763         if (!p_dev->dev.driver) {
 764                 ds_dev_dbg(1, dev, "update device information\n");
 765                 pcmcia_device_query(p_dev);
 766         }
 767
 768         return 0;
 769 }
 770
 771 static void pcmcia_bus_rescan(struct pcmcia_socket *skt, int new_cis)
 772 {
 773         int no_devices = 0;
 774         int ret = 0;
 775         unsigned long flags;
 776
 777         /* must be called with skt_mutex held */
 778         ds_dev_dbg(0, &skt->dev, "re-scanning socket %d\n", skt->sock);
 779
 780         spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 781         if (list_empty(&skt->devices_list))
 782                 no_devices = 1;
 783         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 784
 785         /* If this is because of a CIS override, start over */
 786         if (new_cis && !no_devices)
 787                 pcmcia_card_remove(skt, NULL);
 788
 789         /* if no devices were added for this socket yet because of
 790          * missing resource information or other trouble, we need to
 791          * do this now. */
 792         if (no_devices || new_cis) {
 793                 ret = pcmcia_card_add(skt);
 794                 if (ret)
 795                         return;
 796         }
 797
 798         /* some device information might have changed because of a CIS
 799          * update or because we can finally read it correctly... so
 800          * determine it again, overwriting old values if necessary. */
 801         bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery);
 802
 803         /* we re-scan all devices, not just the ones connected to this
 804          * socket. This does not matter, though. */
 805         ret = bus_rescan_devices(&pcmcia_bus_type);
 806         if (ret)
 807                 printk(KERN_INFO "pcmcia: bus_rescan_devices failed\n");
 808 }
 809
 810 #ifdef CONFIG_PCMCIA_LOAD_CIS
 811
 812 /**
 813  * pcmcia_load_firmware - load CIS from userspace if device-provided is broken
 814  * @dev: the pcmcia device which needs a CIS override
 815  * @filename: requested filename in /lib/firmware/
 816  *
 817  * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if
 818  * the one provided by the card is broken. The firmware files reside in
 819  * /lib/firmware/ in userspace.
 820  */
 821 static int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
 822 {
 823         struct pcmcia_socket *s = dev->socket;
 824         const struct firmware *fw;
 825         char path[FIRMWARE_NAME_MAX];
 826         int ret = -ENOMEM;
 827         int no_funcs;
 828         int old_funcs;
 829         cistpl_longlink_mfc_t mfc;
 830
 831         if (!filename)
 832                 return -EINVAL;
 833
 834         ds_dev_dbg(1, &dev->dev, "trying to load CIS file %s\n", filename);
 835
 836         if (strlen(filename) > (FIRMWARE_NAME_MAX - 1)) {
 837                 dev_printk(KERN_WARNING, &dev->dev,
 838                            "pcmcia: CIS filename is too long [%s]\n",
 839                            filename);
 840                 return -EINVAL;
 841         }
 842
 843         snprintf(path, sizeof(path), "%s", filename);
 844
 845         if (request_firmware(&fw, path, &dev->dev) == 0) {
 846                 if (fw->size >= CISTPL_MAX_CIS_SIZE) {
 847                         ret = -EINVAL;
 848                         dev_printk(KERN_ERR, &dev->dev,
 849                                    "pcmcia: CIS override is too big\n");
 850                         goto release;
 851                 }
 852
 853                 if (!pcmcia_replace_cis(s, fw->data, fw->size))
 854                         ret = 0;
 855                 else {
 856                         dev_printk(KERN_ERR, &dev->dev,
 857                                    "pcmcia: CIS override failed\n");
 858                         goto release;
 859                 }
 860
 861
 862                 /* update information */
 863                 pcmcia_device_query(dev);
 864
 865                 /* does this cis override add or remove functions? */
 866                 old_funcs = s->functions;
 867
 868                 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
 869                         no_funcs = mfc.nfn;
 870                 else
 871                         no_funcs = 1;
 872                 s->functions = no_funcs;
 873
 874                 if (old_funcs > no_funcs)
 875                         pcmcia_card_remove(s, dev);
 876                 else if (no_funcs > old_funcs)
 877                         pcmcia_add_device_later(s, 1);
 878         }
 879  release:
 880         release_firmware(fw);
 881
 882         return (ret);
 883 }
 884
 885 #else /* !CONFIG_PCMCIA_LOAD_CIS */
 886
 887 static inline int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
 888 {
 889         return -ENODEV;
 890 }
 891
 892 #endif
 893
 894
 895 static inline int pcmcia_devmatch(struct pcmcia_device *dev,
 896                                   struct pcmcia_device_id *did)
 897 {
 898         if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
 899                 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
 900                         return 0;
 901         }
 902
 903         if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
 904                 if ((!dev->has_card_id) || (dev->card_id != did->card_id))
 905                         return 0;
 906         }
 907
 908         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
 909                 if (dev->func != did->function)
 910                         return 0;
 911         }
 912
 913         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
 914                 if (!dev->prod_id[0])
 915                         return 0;
 916                 if (strcmp(did->prod_id[0], dev->prod_id[0]))
 917                         return 0;
 918         }
 919
 920         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
 921                 if (!dev->prod_id[1])
 922                         return 0;
 923                 if (strcmp(did->prod_id[1], dev->prod_id[1]))
 924                         return 0;
 925         }
 926
 927         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
 928                 if (!dev->prod_id[2])
 929                         return 0;
 930                 if (strcmp(did->prod_id[2], dev->prod_id[2]))
 931                         return 0;
 932         }
 933
 934         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
 935                 if (!dev->prod_id[3])
 936                         return 0;
 937                 if (strcmp(did->prod_id[3], dev->prod_id[3]))
 938                         return 0;
 939         }
 940
 941         if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
 942                 if (dev->device_no != did->device_no)
 943                         return 0;
 944         }
 945
 946         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
 947                 if ((!dev->has_func_id) || (dev->func_id != did->func_id))
 948                         return 0;
 949
 950                 /* if this is a pseudo-multi-function device,
 951                  * we need explicit matches */
 952                 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO)
 953                         return 0;
 954                 if (dev->device_no)
 955                         return 0;
 956
 957                 /* also, FUNC_ID matching needs to be activated by userspace
 958                  * after it has re-checked that there is no possible module
 959                  * with a prod_id/manf_id/card_id match.
 960                  */
 961                 ds_dev_dbg(0, &dev->dev,
 962                         "skipping FUNC_ID match until userspace interaction\n");
 963                 if (!dev->allow_func_id_match)
 964                         return 0;
 965         }
 966
 967         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
 968                 ds_dev_dbg(0, &dev->dev, "device needs a fake CIS\n");
 969                 if (!dev->socket->fake_cis)
 970                         pcmcia_load_firmware(dev, did->cisfile);
 971
 972                 if (!dev->socket->fake_cis)
 973                         return 0;
 974         }
 975
 976         if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
 977                 int i;
 978                 for (i=0; i<4; i++)
 979                         if (dev->prod_id[i])
 980                                 return 0;
 981                 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
 982                         return 0;
 983         }
 984
 985         dev->dev.driver_data = (void *) did;
 986
 987         return 1;
 988 }
 989
 990
 991 static int pcmcia_bus_match(struct device * dev, struct device_driver * drv) {
 992         struct pcmcia_device * p_dev = to_pcmcia_dev(dev);
 993         struct pcmcia_driver * p_drv = to_pcmcia_drv(drv);
 994         struct pcmcia_device_id *did = p_drv->id_table;
 995         struct pcmcia_dynid *dynid;
 996
 997         /* match dynamic devices first */
 998         spin_lock(&p_drv->dynids.lock);
 999         list_for_each_entry(dynid, &p_drv->dynids.list, node) {
1000                 ds_dev_dbg(3, dev, "trying to match to %s\n", drv->name);
1001                 if (pcmcia_devmatch(p_dev, &dynid->id)) {
1002                         ds_dev_dbg(0, dev, "matched to %s\n", drv->name);
1003                         spin_unlock(&p_drv->dynids.lock);
1004                         return 1;
1005                 }
1006         }
1007         spin_unlock(&p_drv->dynids.lock);
1008
1009 #ifdef CONFIG_PCMCIA_IOCTL
1010         /* matching by cardmgr */
1011         if (p_dev->cardmgr == p_drv) {
1012                 ds_dev_dbg(0, dev, "cardmgr matched to %s\n", drv->name);
1013                 return 1;
1014         }
1015 #endif
1016
1017         while (did && did->match_flags) {
1018                 ds_dev_dbg(3, dev, "trying to match to %s\n", drv->name);
1019                 if (pcmcia_devmatch(p_dev, did)) {
1020                         ds_dev_dbg(0, dev, "matched to %s\n", drv->name);
1021                         return 1;
1022                 }
1023                 did++;
1024         }
1025
1026         return 0;
1027 }
1028
1029 #ifdef CONFIG_HOTPLUG
1030
1031 static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
1032 {
1033         struct pcmcia_device *p_dev;
1034         int i;
1035         u32 hash[4] = { 0, 0, 0, 0};
1036
1037         if (!dev)
1038                 return -ENODEV;
1039
1040         p_dev = to_pcmcia_dev(dev);
1041
1042         /* calculate hashes */
1043         for (i=0; i<4; i++) {
1044                 if (!p_dev->prod_id[i])
1045                         continue;
1046                 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
1047         }
1048
1049         if (add_uevent_var(env, "SOCKET_NO=%u", p_dev->socket->sock))
1050                 return -ENOMEM;
1051
1052         if (add_uevent_var(env, "DEVICE_NO=%02X", p_dev->device_no))
1053                 return -ENOMEM;
1054
1055         if (add_uevent_var(env, "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
1056                            "pa%08Xpb%08Xpc%08Xpd%08X",
1057                            p_dev->has_manf_id ? p_dev->manf_id : 0,
1058                            p_dev->has_card_id ? p_dev->card_id : 0,
1059                            p_dev->has_func_id ? p_dev->func_id : 0,
1060                            p_dev->func,
1061                            p_dev->device_no,
1062                            hash[0],
1063                            hash[1],
1064                            hash[2],
1065                            hash[3]))
1066                 return -ENOMEM;
1067
1068         return 0;
1069 }
1070
1071 #else
1072
1073 static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
1074 {
1075         return -ENODEV;
1076 }
1077
1078 #endif
1079
1080 /************************ runtime PM support ***************************/
1081
1082 static int pcmcia_dev_suspend(struct device *dev, pm_message_t state);
1083 static int pcmcia_dev_resume(struct device *dev);
1084
1085 static int runtime_suspend(struct device *dev)
1086 {
1087         int rc;
1088
1089         down(&dev->sem);
1090         rc = pcmcia_dev_suspend(dev, PMSG_SUSPEND);
1091         up(&dev->sem);
1092         return rc;
1093 }
1094
1095 static void runtime_resume(struct device *dev)
1096 {
1097         int rc;
1098
1099         down(&dev->sem);
1100         rc = pcmcia_dev_resume(dev);
1101         up(&dev->sem);
1102 }
1103
1104 /************************ per-device sysfs output ***************************/
1105
1106 #define pcmcia_device_attr(field, test, format)                         \
1107 static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf)              \
1108 {                                                                       \
1109         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);               \
1110         return p_dev->test ? sprintf (buf, format, p_dev->field) : -ENODEV; \
1111 }
1112
1113 #define pcmcia_device_stringattr(name, field)                                   \
1114 static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf)               \
1115 {                                                                       \
1116         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);               \
1117         return p_dev->field ? sprintf (buf, "%s\n", p_dev->field) : -ENODEV; \
1118 }
1119
1120 pcmcia_device_attr(func, socket, "0x%02x\n");
1121 pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
1122 pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
1123 pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
1124 pcmcia_device_stringattr(prod_id1, prod_id[0]);
1125 pcmcia_device_stringattr(prod_id2, prod_id[1]);
1126 pcmcia_device_stringattr(prod_id3, prod_id[2]);
1127 pcmcia_device_stringattr(prod_id4, prod_id[3]);
1128
1129
1130 static ssize_t pcmcia_show_pm_state(struct device *dev, struct device_attribute *attr, char *buf)
1131 {
1132         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1133
1134         if (p_dev->suspended)
1135                 return sprintf(buf, "off\n");
1136         else
1137                 return sprintf(buf, "on\n");
1138 }
1139
1140 static ssize_t pcmcia_store_pm_state(struct device *dev, struct device_attribute *attr,
1141                                      const char *buf, size_t count)
1142 {
1143         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1144         int ret = 0;
1145
1146         if (!count)
1147                 return -EINVAL;
1148
1149         if ((!p_dev->suspended) && !strncmp(buf, "off", 3))
1150                 ret = runtime_suspend(dev);
1151         else if (p_dev->suspended && !strncmp(buf, "on", 2))
1152                 runtime_resume(dev);
1153
1154         return ret ? ret : count;
1155 }
1156
1157
1158 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1159 {
1160         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1161         int i;
1162         u32 hash[4] = { 0, 0, 0, 0};
1163
1164         /* calculate hashes */
1165         for (i=0; i<4; i++) {
1166                 if (!p_dev->prod_id[i])
1167                         continue;
1168                 hash[i] = crc32(0,p_dev->prod_id[i],strlen(p_dev->prod_id[i]));
1169         }
1170         return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
1171                                 "pa%08Xpb%08Xpc%08Xpd%08X\n",
1172                                 p_dev->has_manf_id ? p_dev->manf_id : 0,
1173                                 p_dev->has_card_id ? p_dev->card_id : 0,
1174                                 p_dev->has_func_id ? p_dev->func_id : 0,
1175                                 p_dev->func, p_dev->device_no,
1176                                 hash[0], hash[1], hash[2], hash[3]);
1177 }
1178
1179 static ssize_t pcmcia_store_allow_func_id_match(struct device *dev,
1180                 struct device_attribute *attr, const char *buf, size_t count)
1181 {
1182         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1183         int ret;
1184
1185         if (!count)
1186                 return -EINVAL;
1187
1188         mutex_lock(&p_dev->socket->skt_mutex);
1189         p_dev->allow_func_id_match = 1;
1190         mutex_unlock(&p_dev->socket->skt_mutex);
1191
1192         ret = bus_rescan_devices(&pcmcia_bus_type);
1193         if (ret)
1194                 printk(KERN_INFO "pcmcia: bus_rescan_devices failed after "
1195                        "allowing func_id matches\n");
1196
1197         return count;
1198 }
1199
1200 static struct device_attribute pcmcia_dev_attrs[] = {
1201         __ATTR(function, 0444, func_show, NULL),
1202         __ATTR(pm_state, 0644, pcmcia_show_pm_state, pcmcia_store_pm_state),
1203         __ATTR_RO(func_id),
1204         __ATTR_RO(manf_id),
1205         __ATTR_RO(card_id),
1206         __ATTR_RO(prod_id1),
1207         __ATTR_RO(prod_id2),
1208         __ATTR_RO(prod_id3),
1209         __ATTR_RO(prod_id4),
1210         __ATTR_RO(modalias),
1211         __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match),
1212         __ATTR_NULL,
1213 };
1214
1215 /* PM support, also needed for reset */
1216
1217 static int pcmcia_dev_suspend(struct device * dev, pm_message_t state)
1218 {
1219         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1220         struct pcmcia_driver *p_drv = NULL;
1221         int ret = 0;
1222
1223         if (p_dev->suspended)
1224                 return 0;
1225
1226         ds_dev_dbg(2, dev, "suspending\n");
1227
1228         if (dev->driver)
1229                 p_drv = to_pcmcia_drv(dev->driver);
1230
1231         if (!p_drv)
1232                 goto out;
1233
1234         if (p_drv->suspend) {
1235                 ret = p_drv->suspend(p_dev);
1236                 if (ret) {
1237                         dev_printk(KERN_ERR, dev,
1238                                    "pcmcia: device %s (driver %s) did "
1239                                    "not want to go to sleep (%d)\n",
1240                                    p_dev->devname, p_drv->drv.name, ret);
1241                         goto out;
1242                 }
1243         }
1244
1245         if (p_dev->device_no == p_dev->func) {
1246                 ds_dev_dbg(2, dev, "releasing configuration\n");
1247                 pcmcia_release_configuration(p_dev);
1248         }
1249
1250  out:
1251         if (!ret)
1252                 p_dev->suspended = 1;
1253         return ret;
1254 }
1255
1256
1257 static int pcmcia_dev_resume(struct device * dev)
1258 {
1259         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1260         struct pcmcia_driver *p_drv = NULL;
1261         int ret = 0;
1262
1263         if (!p_dev->suspended)
1264                 return 0;
1265
1266         ds_dev_dbg(2, dev, "resuming\n");
1267
1268         if (dev->driver)
1269                 p_drv = to_pcmcia_drv(dev->driver);
1270
1271         if (!p_drv)
1272                 goto out;
1273
1274         if (p_dev->device_no == p_dev->func) {
1275                 ds_dev_dbg(2, dev, "requesting configuration\n");
1276                 ret = pcmcia_request_configuration(p_dev, &p_dev->conf);
1277                 if (ret)
1278                         goto out;
1279         }
1280
1281         if (p_drv->resume)
1282                 ret = p_drv->resume(p_dev);
1283
1284  out:
1285         if (!ret)
1286                 p_dev->suspended = 0;
1287         return ret;
1288 }
1289
1290
1291 static int pcmcia_bus_suspend_callback(struct device *dev, void * _data)
1292 {
1293         struct pcmcia_socket *skt = _data;
1294         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1295
1296         if (p_dev->socket != skt || p_dev->suspended)
1297                 return 0;
1298
1299         return runtime_suspend(dev);
1300 }
1301
1302 static int pcmcia_bus_resume_callback(struct device *dev, void * _data)
1303 {
1304         struct pcmcia_socket *skt = _data;
1305         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1306
1307         if (p_dev->socket != skt || !p_dev->suspended)
1308                 return 0;
1309
1310         runtime_resume(dev);
1311
1312         return 0;
1313 }
1314
1315 static int pcmcia_bus_resume(struct pcmcia_socket *skt)
1316 {
1317         ds_dev_dbg(2, &skt->dev, "resuming socket %d\n", skt->sock);
1318         bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback);
1319         return 0;
1320 }
1321
1322 static int pcmcia_bus_suspend(struct pcmcia_socket *skt)
1323 {
1324         ds_dev_dbg(2, &skt->dev, "suspending socket %d\n", skt->sock);
1325         if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt,
1326                              pcmcia_bus_suspend_callback)) {
1327                 pcmcia_bus_resume(skt);
1328                 return -EIO;
1329         }
1330         return 0;
1331 }
1332
1333
1334 /*======================================================================
1335
1336     The card status event handler.
1337
1338 ======================================================================*/
1339
1340 /* Normally, the event is passed to individual drivers after
1341  * informing userspace. Only for CS_EVENT_CARD_REMOVAL this
1342  * is inversed to maintain historic compatibility.
1343  */
1344
1345 static int ds_event(struct pcmcia_socket *skt, event_t event, int priority)
1346 {
1347         struct pcmcia_socket *s = pcmcia_get_socket(skt);
1348
1349         if (!s) {
1350                 dev_printk(KERN_ERR, &skt->dev,
1351                            "PCMCIA obtaining reference to socket "      \
1352                            "failed, event 0x%x lost!\n", event);
1353                 return -ENODEV;
1354         }
1355
1356         ds_dev_dbg(1, &skt->dev, "ds_event(0x%06x, %d, 0x%p)\n",
1357                    event, priority, skt);
1358
1359         switch (event) {
1360         case CS_EVENT_CARD_REMOVAL:
1361                 s->pcmcia_state.present = 0;
1362                 pcmcia_card_remove(skt, NULL);
1363                 handle_event(skt, event);
1364                 break;
1365
1366         case CS_EVENT_CARD_INSERTION:
1367                 s->pcmcia_state.present = 1;
1368                 pcmcia_card_add(skt);
1369                 handle_event(skt, event);
1370                 break;
1371
1372         case CS_EVENT_EJECTION_REQUEST:
1373                 break;
1374
1375         case CS_EVENT_PM_SUSPEND:
1376         case CS_EVENT_PM_RESUME:
1377         case CS_EVENT_RESET_PHYSICAL:
1378         case CS_EVENT_CARD_RESET:
1379         default:
1380                 handle_event(skt, event);
1381                 break;
1382     }
1383
1384     pcmcia_put_socket(s);
1385
1386     return 0;
1387 } /* ds_event */
1388
1389
1390 struct pcmcia_device * pcmcia_dev_present(struct pcmcia_device *_p_dev)
1391 {
1392         struct pcmcia_device *p_dev;
1393         struct pcmcia_device *ret = NULL;
1394
1395         p_dev = pcmcia_get_dev(_p_dev);
1396         if (!p_dev)
1397                 return NULL;
1398
1399         if (!p_dev->socket->pcmcia_state.present)
1400                 goto out;
1401
1402         if (p_dev->_removed)
1403                 goto out;
1404
1405         if (p_dev->suspended)
1406                 goto out;
1407
1408         ret = p_dev;
1409  out:
1410         pcmcia_put_dev(p_dev);
1411         return ret;
1412 }
1413 EXPORT_SYMBOL(pcmcia_dev_present);
1414
1415
1416 static struct pcmcia_callback pcmcia_bus_callback = {
1417         .owner = THIS_MODULE,
1418         .event = ds_event,
1419         .requery = pcmcia_bus_rescan,
1420         .suspend = pcmcia_bus_suspend,
1421         .resume = pcmcia_bus_resume,
1422 };
1423
1424 static int __devinit pcmcia_bus_add_socket(struct device *dev,
1425                                            struct class_interface *class_intf)
1426 {
1427         struct pcmcia_socket *socket = dev_get_drvdata(dev);
1428         int ret;
1429
1430         socket = pcmcia_get_socket(socket);
1431         if (!socket) {
1432                 dev_printk(KERN_ERR, dev,
1433                            "PCMCIA obtaining reference to socket failed\n");
1434                 return -ENODEV;
1435         }
1436
1437         /*
1438          * Ugly. But we want to wait for the socket threads to have started up.
1439          * We really should let the drivers themselves drive some of this..
1440          */
1441         msleep(250);
1442
1443 #ifdef CONFIG_PCMCIA_IOCTL
1444         init_waitqueue_head(&socket->queue);
1445 #endif
1446         INIT_LIST_HEAD(&socket->devices_list);
1447         INIT_WORK(&socket->device_add, pcmcia_delayed_add_device);
1448         memset(&socket->pcmcia_state, 0, sizeof(u8));
1449         socket->device_count = 0;
1450
1451         ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback);
1452         if (ret) {
1453                 dev_printk(KERN_ERR, dev, "PCMCIA registration failed\n");
1454                 pcmcia_put_socket(socket);
1455                 return (ret);
1456         }
1457
1458         return 0;
1459 }
1460
1461 static void pcmcia_bus_remove_socket(struct device *dev,
1462                                      struct class_interface *class_intf)
1463 {
1464         struct pcmcia_socket *socket = dev_get_drvdata(dev);
1465
1466         if (!socket)
1467                 return;
1468
1469         socket->pcmcia_state.dead = 1;
1470         pccard_register_pcmcia(socket, NULL);
1471
1472         /* unregister any unbound devices */
1473         mutex_lock(&socket->skt_mutex);
1474         pcmcia_card_remove(socket, NULL);
1475         mutex_unlock(&socket->skt_mutex);
1476
1477         pcmcia_put_socket(socket);
1478
1479         return;
1480 }
1481
1482
1483 /* the pcmcia_bus_interface is used to handle pcmcia socket devices */
1484 static struct class_interface pcmcia_bus_interface __refdata = {
1485         .class = &pcmcia_socket_class,
1486         .add_dev = &pcmcia_bus_add_socket,
1487         .remove_dev = &pcmcia_bus_remove_socket,
1488 };
1489
1490
1491 struct bus_type pcmcia_bus_type = {
1492         .name = "pcmcia",
1493         .uevent = pcmcia_bus_uevent,
1494         .match = pcmcia_bus_match,
1495         .dev_attrs = pcmcia_dev_attrs,
1496         .probe = pcmcia_device_probe,
1497         .remove = pcmcia_device_remove,
1498         .suspend = pcmcia_dev_suspend,
1499         .resume = pcmcia_dev_resume,
1500 };
1501
1502
1503 static int __init init_pcmcia_bus(void)
1504 {
1505         int ret;
1506
1507         spin_lock_init(&pcmcia_dev_list_lock);
1508
1509         ret = bus_register(&pcmcia_bus_type);
1510         if (ret < 0) {
1511                 printk(KERN_WARNING "pcmcia: bus_register error: %d\n", ret);
1512                 return ret;
1513         }
1514         ret = class_interface_register(&pcmcia_bus_interface);
1515         if (ret < 0) {
1516                 printk(KERN_WARNING
1517                         "pcmcia: class_interface_register error: %d\n", ret);
1518                 bus_unregister(&pcmcia_bus_type);
1519                 return ret;
1520         }
1521
1522         pcmcia_setup_ioctl();
1523
1524         return 0;
1525 }
1526 fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that
1527                                * pcmcia_socket_class is already registered */
1528
1529
1530 static void __exit exit_pcmcia_bus(void)
1531 {
1532         pcmcia_cleanup_ioctl();
1533
1534         class_interface_unregister(&pcmcia_bus_interface);
1535
1536         bus_unregister(&pcmcia_bus_type);
1537 }
1538 module_exit(exit_pcmcia_bus);
1539
1540
1541 MODULE_ALIAS("ds");