SAFE public projects git trees. - safe/jmp/linux-2.6/blob - 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 #include "ds_internal.h"
  36
  37 /*====================================================================*/
  38
  39 /* Module parameters */
  40
  41 MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
  42 MODULE_DESCRIPTION("PCMCIA Driver Services");
  43 MODULE_LICENSE("GPL");
  44
  45 #ifdef CONFIG_PCMCIA_DEBUG
  46 int ds_pc_debug;
  47
  48 module_param_named(pc_debug, ds_pc_debug, int, 0644);
  49
  50 #define ds_dbg(lvl, fmt, arg...) do {                           \
  51         if (ds_pc_debug > (lvl))                                \
  52                 printk(KERN_DEBUG "ds: " fmt , ## arg);         \
  53 } while (0)
  54 #define ds_dev_dbg(lvl, dev, fmt, arg...) do {                          \
  55         if (ds_pc_debug > (lvl))                                        \
  56                 dev_printk(KERN_DEBUG, dev, "ds: " fmt , ## arg);       \
  57 } while (0)
  58 #else
  59 #define ds_dbg(lvl, fmt, arg...) do { } while (0)
  60 #define ds_dev_dbg(lvl, dev, fmt, arg...) do { } while (0)
  61 #endif
  62
  63 spinlock_t pcmcia_dev_list_lock;
  64
  65 /*====================================================================*/
  66
  67 /* code which was in cs.c before */
  68
  69 /* String tables for error messages */
  70
  71 typedef struct lookup_t {
  72     const int key;
  73     const char *msg;
  74 } lookup_t;
  75
  76 static const lookup_t error_table[] = {
  77     { 0,                        "Operation succeeded" },
  78     { -EIO,                     "Input/Output error" },
  79     { -ENODEV,                  "No card present" },
  80     { -EINVAL,                  "Bad parameter" },
  81     { -EACCES,                  "Configuration locked" },
  82     { -EBUSY,                   "Resource in use" },
  83     { -ENOSPC,                  "No more items" },
  84     { -ENOMEM,                  "Out of resource" },
  85 };
  86
  87
  88 static const lookup_t service_table[] = {
  89     { AccessConfigurationRegister,      "AccessConfigurationRegister" },
  90     { AddSocketServices,                "AddSocketServices" },
  91     { AdjustResourceInfo,               "AdjustResourceInfo" },
  92     { CheckEraseQueue,                  "CheckEraseQueue" },
  93     { CloseMemory,                      "CloseMemory" },
  94     { DeregisterClient,                 "DeregisterClient" },
  95     { DeregisterEraseQueue,             "DeregisterEraseQueue" },
  96     { GetCardServicesInfo,              "GetCardServicesInfo" },
  97     { GetClientInfo,                    "GetClientInfo" },
  98     { GetConfigurationInfo,             "GetConfigurationInfo" },
  99     { GetEventMask,                     "GetEventMask" },
 100     { GetFirstClient,                   "GetFirstClient" },
 101     { GetFirstRegion,                   "GetFirstRegion" },
 102     { GetFirstTuple,                    "GetFirstTuple" },
 103     { GetNextClient,                    "GetNextClient" },
 104     { GetNextRegion,                    "GetNextRegion" },
 105     { GetNextTuple,                     "GetNextTuple" },
 106     { GetStatus,                        "GetStatus" },
 107     { GetTupleData,                     "GetTupleData" },
 108     { MapMemPage,                       "MapMemPage" },
 109     { ModifyConfiguration,              "ModifyConfiguration" },
 110     { ModifyWindow,                     "ModifyWindow" },
 111     { OpenMemory,                       "OpenMemory" },
 112     { ParseTuple,                       "ParseTuple" },
 113     { ReadMemory,                       "ReadMemory" },
 114     { RegisterClient,                   "RegisterClient" },
 115     { RegisterEraseQueue,               "RegisterEraseQueue" },
 116     { RegisterMTD,                      "RegisterMTD" },
 117     { ReleaseConfiguration,             "ReleaseConfiguration" },
 118     { ReleaseIO,                        "ReleaseIO" },
 119     { ReleaseIRQ,                       "ReleaseIRQ" },
 120     { ReleaseWindow,                    "ReleaseWindow" },
 121     { RequestConfiguration,             "RequestConfiguration" },
 122     { RequestIO,                        "RequestIO" },
 123     { RequestIRQ,                       "RequestIRQ" },
 124     { RequestSocketMask,                "RequestSocketMask" },
 125     { RequestWindow,                    "RequestWindow" },
 126     { ResetCard,                        "ResetCard" },
 127     { SetEventMask,                     "SetEventMask" },
 128     { ValidateCIS,                      "ValidateCIS" },
 129     { WriteMemory,                      "WriteMemory" },
 130     { BindDevice,                       "BindDevice" },
 131     { BindMTD,                          "BindMTD" },
 132     { ReportError,                      "ReportError" },
 133     { SuspendCard,                      "SuspendCard" },
 134     { ResumeCard,                       "ResumeCard" },
 135     { EjectCard,                        "EjectCard" },
 136     { InsertCard,                       "InsertCard" },
 137     { ReplaceCIS,                       "ReplaceCIS" }
 138 };
 139
 140 const char *pcmcia_error_func(int func)
 141 {
 142         int i;
 143
 144         for (i = 0; i < ARRAY_SIZE(service_table); i++)
 145                 if (service_table[i].key == func)
 146                         return service_table[i].msg;
 147
 148         return "Unknown service number";
 149 }
 150 EXPORT_SYMBOL(pcmcia_error_func);
 151
 152 const char *pcmcia_error_ret(int ret)
 153 {
 154         int i;
 155
 156         for (i = 0; i < ARRAY_SIZE(error_table); i++)
 157                 if (error_table[i].key == ret)
 158                         return error_table[i].msg;
 159
 160         return "unknown";
 161 }
 162 EXPORT_SYMBOL(pcmcia_error_ret);
 163
 164 /*======================================================================*/
 165
 166
 167
 168 static void pcmcia_check_driver(struct pcmcia_driver *p_drv)
 169 {
 170         struct pcmcia_device_id *did = p_drv->id_table;
 171         unsigned int i;
 172         u32 hash;
 173
 174         if (!p_drv->probe || !p_drv->remove)
 175                 printk(KERN_DEBUG "pcmcia: %s lacks a requisite callback "
 176                        "function\n", p_drv->drv.name);
 177
 178         while (did && did->match_flags) {
 179                 for (i=0; i<4; i++) {
 180                         if (!did->prod_id[i])
 181                                 continue;
 182
 183                         hash = crc32(0, did->prod_id[i], strlen(did->prod_id[i]));
 184                         if (hash == did->prod_id_hash[i])
 185                                 continue;
 186
 187                         printk(KERN_DEBUG "pcmcia: %s: invalid hash for "
 188                                "product string \"%s\": is 0x%x, should "
 189                                "be 0x%x\n", p_drv->drv.name, did->prod_id[i],
 190                                did->prod_id_hash[i], hash);
 191                         printk(KERN_DEBUG "pcmcia: see "
 192                                 "Documentation/pcmcia/devicetable.txt for "
 193                                 "details\n");
 194                 }
 195                 did++;
 196         }
 197
 198         return;
 199 }
 200
 201
 202 /*======================================================================*/
 203
 204
 205 struct pcmcia_dynid {
 206         struct list_head                node;
 207         struct pcmcia_device_id         id;
 208 };
 209
 210 /**
 211  * pcmcia_store_new_id - add a new PCMCIA device ID to this driver and re-probe devices
 212  * @driver: target device driver
 213  * @buf: buffer for scanning device ID data
 214  * @count: input size
 215  *
 216  * Adds a new dynamic PCMCIA device ID to this driver,
 217  * and causes the driver to probe for all devices again.
 218  */
 219 static ssize_t
 220 pcmcia_store_new_id(struct device_driver *driver, const char *buf, size_t count)
 221 {
 222         struct pcmcia_dynid *dynid;
 223         struct pcmcia_driver *pdrv = to_pcmcia_drv(driver);
 224         __u16 match_flags, manf_id, card_id;
 225         __u8 func_id, function, device_no;
 226         __u32 prod_id_hash[4] = {0, 0, 0, 0};
 227         int fields=0;
 228         int retval = 0;
 229
 230         fields = sscanf(buf, "%hx %hx %hx %hhx %hhx %hhx %x %x %x %x",
 231                         &match_flags, &manf_id, &card_id, &func_id, &function, &device_no,
 232                         &prod_id_hash[0], &prod_id_hash[1], &prod_id_hash[2], &prod_id_hash[3]);
 233         if (fields < 6)
 234                 return -EINVAL;
 235
 236         dynid = kzalloc(sizeof(struct pcmcia_dynid), GFP_KERNEL);
 237         if (!dynid)
 238                 return -ENOMEM;
 239
 240         INIT_LIST_HEAD(&dynid->node);
 241         dynid->id.match_flags = match_flags;
 242         dynid->id.manf_id = manf_id;
 243         dynid->id.card_id = card_id;
 244         dynid->id.func_id = func_id;
 245         dynid->id.function = function;
 246         dynid->id.device_no = device_no;
 247         memcpy(dynid->id.prod_id_hash, prod_id_hash, sizeof(__u32) * 4);
 248
 249         spin_lock(&pdrv->dynids.lock);
 250         list_add_tail(&pdrv->dynids.list, &dynid->node);
 251         spin_unlock(&pdrv->dynids.lock);
 252
 253         if (get_driver(&pdrv->drv)) {
 254                 retval = driver_attach(&pdrv->drv);
 255                 put_driver(&pdrv->drv);
 256         }
 257
 258         if (retval)
 259                 return retval;
 260         return count;
 261 }
 262 static DRIVER_ATTR(new_id, S_IWUSR, NULL, pcmcia_store_new_id);
 263
 264 static void
 265 pcmcia_free_dynids(struct pcmcia_driver *drv)
 266 {
 267         struct pcmcia_dynid *dynid, *n;
 268
 269         spin_lock(&drv->dynids.lock);
 270         list_for_each_entry_safe(dynid, n, &drv->dynids.list, node) {
 271                 list_del(&dynid->node);
 272                 kfree(dynid);
 273         }
 274         spin_unlock(&drv->dynids.lock);
 275 }
 276
 277 static int
 278 pcmcia_create_newid_file(struct pcmcia_driver *drv)
 279 {
 280         int error = 0;
 281         if (drv->probe != NULL)
 282                 error = driver_create_file(&drv->drv, &driver_attr_new_id);
 283         return error;
 284 }
 285
 286
 287 /**
 288  * pcmcia_register_driver - register a PCMCIA driver with the bus core
 289  * @driver: the &driver being registered
 290  *
 291  * Registers a PCMCIA driver with the PCMCIA bus core.
 292  */
 293 int pcmcia_register_driver(struct pcmcia_driver *driver)
 294 {
 295         int error;
 296
 297         if (!driver)
 298                 return -EINVAL;
 299
 300         pcmcia_check_driver(driver);
 301
 302         /* initialize common fields */
 303         driver->drv.bus = &pcmcia_bus_type;
 304         driver->drv.owner = driver->owner;
 305         spin_lock_init(&driver->dynids.lock);
 306         INIT_LIST_HEAD(&driver->dynids.list);
 307
 308         ds_dbg(3, "registering driver %s\n", driver->drv.name);
 309
 310         error = driver_register(&driver->drv);
 311         if (error < 0)
 312                 return error;
 313
 314         error = pcmcia_create_newid_file(driver);
 315         if (error)
 316                 driver_unregister(&driver->drv);
 317
 318         return error;
 319 }
 320 EXPORT_SYMBOL(pcmcia_register_driver);
 321
 322 /**
 323  * pcmcia_unregister_driver - unregister a PCMCIA driver with the bus core
 324  * @driver: the &driver being unregistered
 325  */
 326 void pcmcia_unregister_driver(struct pcmcia_driver *driver)
 327 {
 328         ds_dbg(3, "unregistering driver %s\n", driver->drv.name);
 329         driver_unregister(&driver->drv);
 330         pcmcia_free_dynids(driver);
 331 }
 332 EXPORT_SYMBOL(pcmcia_unregister_driver);
 333
 334
 335 /* pcmcia_device handling */
 336
 337 struct pcmcia_device * pcmcia_get_dev(struct pcmcia_device *p_dev)
 338 {
 339         struct device *tmp_dev;
 340         tmp_dev = get_device(&p_dev->dev);
 341         if (!tmp_dev)
 342                 return NULL;
 343         return to_pcmcia_dev(tmp_dev);
 344 }
 345
 346 void pcmcia_put_dev(struct pcmcia_device *p_dev)
 347 {
 348         if (p_dev)
 349                 put_device(&p_dev->dev);
 350 }
 351
 352 static void pcmcia_release_function(struct kref *ref)
 353 {
 354         struct config_t *c = container_of(ref, struct config_t, ref);
 355         ds_dbg(1, "releasing config_t\n");
 356         kfree(c);
 357 }
 358
 359 static void pcmcia_release_dev(struct device *dev)
 360 {
 361         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 362         ds_dev_dbg(1, dev, "releasing device\n");
 363         pcmcia_put_socket(p_dev->socket);
 364         kfree(p_dev->devname);
 365         kref_put(&p_dev->function_config->ref, pcmcia_release_function);
 366         kfree(p_dev);
 367 }
 368
 369 static void pcmcia_add_device_later(struct pcmcia_socket *s, int mfc)
 370 {
 371         if (!s->pcmcia_state.device_add_pending) {
 372                 ds_dev_dbg(1, &s->dev, "scheduling to add %s secondary"
 373                        " device to %d\n", mfc ? "mfc" : "pfc", s->sock);
 374                 s->pcmcia_state.device_add_pending = 1;
 375                 s->pcmcia_state.mfc_pfc = mfc;
 376                 schedule_work(&s->device_add);
 377         }
 378         return;
 379 }
 380
 381 static int pcmcia_device_probe(struct device * dev)
 382 {
 383         struct pcmcia_device *p_dev;
 384         struct pcmcia_driver *p_drv;
 385         struct pcmcia_device_id *did;
 386         struct pcmcia_socket *s;
 387         cistpl_config_t cis_config;
 388         int ret = 0;
 389
 390         dev = get_device(dev);
 391         if (!dev)
 392                 return -ENODEV;
 393
 394         p_dev = to_pcmcia_dev(dev);
 395         p_drv = to_pcmcia_drv(dev->driver);
 396         s = p_dev->socket;
 397
 398         ds_dev_dbg(1, dev, "trying to bind to %s\n", p_drv->drv.name);
 399
 400         if ((!p_drv->probe) || (!p_dev->function_config) ||
 401             (!try_module_get(p_drv->owner))) {
 402                 ret = -EINVAL;
 403                 goto put_dev;
 404         }
 405
 406         /* set up some more device information */
 407         ret = pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_CONFIG,
 408                                 &cis_config);
 409         if (!ret) {
 410                 p_dev->conf.ConfigBase = cis_config.base;
 411                 p_dev->conf.Present = cis_config.rmask[0];
 412         } else {
 413                 dev_printk(KERN_INFO, dev,
 414                            "pcmcia: could not parse base and rmask0 of CIS\n");
 415                 p_dev->conf.ConfigBase = 0;
 416                 p_dev->conf.Present = 0;
 417         }
 418
 419         ret = p_drv->probe(p_dev);
 420         if (ret) {
 421                 ds_dev_dbg(1, dev, "binding to %s failed with %d\n",
 422                            p_drv->drv.name, ret);
 423                 goto put_module;
 424         }
 425
 426         /* handle pseudo multifunction devices:
 427          * there are at most two pseudo multifunction devices.
 428          * if we're matching against the first, schedule a
 429          * call which will then check whether there are two
 430          * pseudo devices, and if not, add the second one.
 431          */
 432         did = p_dev->dev.driver_data;
 433         if (did && (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) &&
 434             (p_dev->socket->device_count == 1) && (p_dev->device_no == 0))
 435                 pcmcia_add_device_later(p_dev->socket, 0);
 436
 437  put_module:
 438         if (ret)
 439                 module_put(p_drv->owner);
 440  put_dev:
 441         if (ret)
 442                 put_device(dev);
 443         return (ret);
 444 }
 445
 446
 447 /*
 448  * Removes a PCMCIA card from the device tree and socket list.
 449  */
 450 static void pcmcia_card_remove(struct pcmcia_socket *s, struct pcmcia_device *leftover)
 451 {
 452         struct pcmcia_device    *p_dev;
 453         struct pcmcia_device    *tmp;
 454         unsigned long           flags;
 455
 456         ds_dev_dbg(2, leftover ? &leftover->dev : &s->dev,
 457                    "pcmcia_card_remove(%d) %s\n", s->sock,
 458                    leftover ? leftover->devname : "");
 459
 460         if (!leftover)
 461                 s->device_count = 0;
 462         else
 463                 s->device_count = 1;
 464
 465         /* unregister all pcmcia_devices registered with this socket, except leftover */
 466         list_for_each_entry_safe(p_dev, tmp, &s->devices_list, socket_device_list) {
 467                 if (p_dev == leftover)
 468                         continue;
 469
 470                 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 471                 list_del(&p_dev->socket_device_list);
 472                 p_dev->_removed=1;
 473                 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 474
 475                 ds_dev_dbg(2, &p_dev->dev, "unregistering device\n");
 476                 device_unregister(&p_dev->dev);
 477         }
 478
 479         return;
 480 }
 481
 482 static int pcmcia_device_remove(struct device * dev)
 483 {
 484         struct pcmcia_device *p_dev;
 485         struct pcmcia_driver *p_drv;
 486         struct pcmcia_device_id *did;
 487         int i;
 488
 489         p_dev = to_pcmcia_dev(dev);
 490         p_drv = to_pcmcia_drv(dev->driver);
 491
 492         ds_dev_dbg(1, dev, "removing device\n");
 493
 494         /* If we're removing the primary module driving a
 495          * pseudo multi-function card, we need to unbind
 496          * all devices
 497          */
 498         did = p_dev->dev.driver_data;
 499         if (did && (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) &&
 500             (p_dev->socket->device_count != 0) &&
 501             (p_dev->device_no == 0))
 502                 pcmcia_card_remove(p_dev->socket, p_dev);
 503
 504         /* detach the "instance" */
 505         if (!p_drv)
 506                 return 0;
 507
 508         if (p_drv->remove)
 509                 p_drv->remove(p_dev);
 510
 511         p_dev->dev_node = NULL;
 512
 513         /* check for proper unloading */
 514         if (p_dev->_irq || p_dev->_io || p_dev->_locked)
 515                 dev_printk(KERN_INFO, dev,
 516                         "pcmcia: driver %s did not release config properly\n",
 517                         p_drv->drv.name);
 518
 519         for (i = 0; i < MAX_WIN; i++)
 520                 if (p_dev->_win & CLIENT_WIN_REQ(i))
 521                         dev_printk(KERN_INFO, dev,
 522                           "pcmcia: driver %s did not release window properly\n",
 523                            p_drv->drv.name);
 524
 525         /* references from pcmcia_probe_device */
 526         pcmcia_put_dev(p_dev);
 527         module_put(p_drv->owner);
 528
 529         return 0;
 530 }
 531
 532
 533 /*
 534  * pcmcia_device_query -- determine information about a pcmcia device
 535  */
 536 static int pcmcia_device_query(struct pcmcia_device *p_dev)
 537 {
 538         cistpl_manfid_t manf_id;
 539         cistpl_funcid_t func_id;
 540         cistpl_vers_1_t *vers1;
 541         unsigned int i;
 542
 543         vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL);
 544         if (!vers1)
 545                 return -ENOMEM;
 546
 547         if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 548                                CISTPL_MANFID, &manf_id)) {
 549                 p_dev->manf_id = manf_id.manf;
 550                 p_dev->card_id = manf_id.card;
 551                 p_dev->has_manf_id = 1;
 552                 p_dev->has_card_id = 1;
 553         }
 554
 555         if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 556                                CISTPL_FUNCID, &func_id)) {
 557                 p_dev->func_id = func_id.func;
 558                 p_dev->has_func_id = 1;
 559         } else {
 560                 /* rule of thumb: cards with no FUNCID, but with
 561                  * common memory device geometry information, are
 562                  * probably memory cards (from pcmcia-cs) */
 563                 cistpl_device_geo_t *devgeo;
 564
 565                 devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL);
 566                 if (!devgeo) {
 567                         kfree(vers1);
 568                         return -ENOMEM;
 569                 }
 570                 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 571                                       CISTPL_DEVICE_GEO, devgeo)) {
 572                         ds_dev_dbg(0, &p_dev->dev,
 573                                    "mem device geometry probably means "
 574                                    "FUNCID_MEMORY\n");
 575                         p_dev->func_id = CISTPL_FUNCID_MEMORY;
 576                         p_dev->has_func_id = 1;
 577                 }
 578                 kfree(devgeo);
 579         }
 580
 581         if (!pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_VERS_1,
 582                                vers1)) {
 583                 for (i=0; i < vers1->ns; i++) {
 584                         char *tmp;
 585                         unsigned int length;
 586
 587                         tmp = vers1->str + vers1->ofs[i];
 588
 589                         length = strlen(tmp) + 1;
 590                         if ((length < 2) || (length > 255))
 591                                 continue;
 592
 593                         p_dev->prod_id[i] = kmalloc(sizeof(char) * length,
 594                                                     GFP_KERNEL);
 595                         if (!p_dev->prod_id[i])
 596                                 continue;
 597
 598                         p_dev->prod_id[i] = strncpy(p_dev->prod_id[i],
 599                                                     tmp, length);
 600                 }
 601         }
 602
 603         kfree(vers1);
 604         return 0;
 605 }
 606
 607
 608 /* device_add_lock is needed to avoid double registration by cardmgr and kernel.
 609  * Serializes pcmcia_device_add; will most likely be removed in future.
 610  *
 611  * While it has the caveat that adding new PCMCIA devices inside(!) device_register()
 612  * won't work, this doesn't matter much at the moment: the driver core doesn't
 613  * support it either.
 614  */
 615 static DEFINE_MUTEX(device_add_lock);
 616
 617 struct pcmcia_device * pcmcia_device_add(struct pcmcia_socket *s, unsigned int function)
 618 {
 619         struct pcmcia_device *p_dev, *tmp_dev;
 620         unsigned long flags;
 621         int bus_id_len;
 622
 623         s = pcmcia_get_socket(s);
 624         if (!s)
 625                 return NULL;
 626
 627         mutex_lock(&device_add_lock);
 628
 629         ds_dbg(3, "adding device to %d, function %d\n", s->sock, function);
 630
 631         /* max of 4 devices per card */
 632         if (s->device_count == 4)
 633                 goto err_put;
 634
 635         p_dev = kzalloc(sizeof(struct pcmcia_device), GFP_KERNEL);
 636         if (!p_dev)
 637                 goto err_put;
 638
 639         p_dev->socket = s;
 640         p_dev->device_no = (s->device_count++);
 641         p_dev->func   = function;
 642
 643         p_dev->dev.bus = &pcmcia_bus_type;
 644         p_dev->dev.parent = s->dev.parent;
 645         p_dev->dev.release = pcmcia_release_dev;
 646         /* by default don't allow DMA */
 647         p_dev->dma_mask = DMA_MASK_NONE;
 648         p_dev->dev.dma_mask = &p_dev->dma_mask;
 649         bus_id_len = sprintf (p_dev->dev.bus_id, "%d.%d", p_dev->socket->sock, p_dev->device_no);
 650
 651         p_dev->devname = kmalloc(6 + bus_id_len + 1, GFP_KERNEL);
 652         if (!p_dev->devname)
 653                 goto err_free;
 654         sprintf (p_dev->devname, "pcmcia%s", p_dev->dev.bus_id);
 655         ds_dev_dbg(3, &p_dev->dev, "devname is %s\n", p_dev->devname);
 656
 657         spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 658
 659         /*
 660          * p_dev->function_config must be the same for all card functions.
 661          * Note that this is serialized by the device_add_lock, so that
 662          * only one such struct will be created.
 663          */
 664         list_for_each_entry(tmp_dev, &s->devices_list, socket_device_list)
 665                 if (p_dev->func == tmp_dev->func) {
 666                         p_dev->function_config = tmp_dev->function_config;
 667                         kref_get(&p_dev->function_config->ref);
 668                 }
 669
 670         /* Add to the list in pcmcia_bus_socket */
 671         list_add(&p_dev->socket_device_list, &s->devices_list);
 672
 673         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 674
 675         if (!p_dev->function_config) {
 676                 ds_dev_dbg(3, &p_dev->dev, "creating config_t\n");
 677                 p_dev->function_config = kzalloc(sizeof(struct config_t),
 678                                                  GFP_KERNEL);
 679                 if (!p_dev->function_config)
 680                         goto err_unreg;
 681                 kref_init(&p_dev->function_config->ref);
 682         }
 683
 684         dev_printk(KERN_NOTICE, &p_dev->dev,
 685                    "pcmcia: registering new device %s\n",
 686                    p_dev->devname);
 687
 688         pcmcia_device_query(p_dev);
 689
 690         if (device_register(&p_dev->dev))
 691                 goto err_unreg;
 692
 693         mutex_unlock(&device_add_lock);
 694
 695         return p_dev;
 696
 697  err_unreg:
 698         spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 699         list_del(&p_dev->socket_device_list);
 700         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 701
 702  err_free:
 703         kfree(p_dev->devname);
 704         kfree(p_dev);
 705         s->device_count--;
 706  err_put:
 707         mutex_unlock(&device_add_lock);
 708         pcmcia_put_socket(s);
 709
 710         return NULL;
 711 }
 712
 713
 714 static int pcmcia_card_add(struct pcmcia_socket *s)
 715 {
 716         cistpl_longlink_mfc_t mfc;
 717         unsigned int no_funcs, i, no_chains;
 718         int ret = 0;
 719
 720         if (!(s->resource_setup_done)) {
 721                 ds_dev_dbg(3, &s->dev,
 722                            "no resources available, delaying card_add\n");
 723                 return -EAGAIN; /* try again, but later... */
 724         }
 725
 726         if (pcmcia_validate_mem(s)) {
 727                 ds_dev_dbg(3, &s->dev, "validating mem resources failed, "
 728                        "delaying card_add\n");
 729                 return -EAGAIN; /* try again, but later... */
 730         }
 731
 732         ret = pccard_validate_cis(s, BIND_FN_ALL, &no_chains);
 733         if (ret || !no_chains) {
 734                 ds_dev_dbg(0, &s->dev, "invalid CIS or invalid resources\n");
 735                 return -ENODEV;
 736         }
 737
 738         if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
 739                 no_funcs = mfc.nfn;
 740         else
 741                 no_funcs = 1;
 742         s->functions = no_funcs;
 743
 744         for (i=0; i < no_funcs; i++)
 745                 pcmcia_device_add(s, i);
 746
 747         return (ret);
 748 }
 749
 750
 751 static void pcmcia_delayed_add_device(struct work_struct *work)
 752 {
 753         struct pcmcia_socket *s =
 754                 container_of(work, struct pcmcia_socket, device_add);
 755         ds_dev_dbg(1, &s->dev, "adding additional device to %d\n", s->sock);
 756         pcmcia_device_add(s, s->pcmcia_state.mfc_pfc);
 757         s->pcmcia_state.device_add_pending = 0;
 758         s->pcmcia_state.mfc_pfc = 0;
 759 }
 760
 761 static int pcmcia_requery(struct device *dev, void * _data)
 762 {
 763         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 764         if (!p_dev->dev.driver) {
 765                 ds_dev_dbg(1, dev, "update device information\n");
 766                 pcmcia_device_query(p_dev);
 767         }
 768
 769         return 0;
 770 }
 771
 772 static void pcmcia_bus_rescan(struct pcmcia_socket *skt, int new_cis)
 773 {
 774         int no_devices = 0;
 775         int ret = 0;
 776         unsigned long flags;
 777
 778         /* must be called with skt_mutex held */
 779         ds_dev_dbg(0, &skt->dev, "re-scanning socket %d\n", skt->sock);
 780
 781         spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 782         if (list_empty(&skt->devices_list))
 783                 no_devices = 1;
 784         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 785
 786         /* If this is because of a CIS override, start over */
 787         if (new_cis && !no_devices)
 788                 pcmcia_card_remove(skt, NULL);
 789
 790         /* if no devices were added for this socket yet because of
 791          * missing resource information or other trouble, we need to
 792          * do this now. */
 793         if (no_devices || new_cis) {
 794                 ret = pcmcia_card_add(skt);
 795                 if (ret)
 796                         return;
 797         }
 798
 799         /* some device information might have changed because of a CIS
 800          * update or because we can finally read it correctly... so
 801          * determine it again, overwriting old values if necessary. */
 802         bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery);
 803
 804         /* we re-scan all devices, not just the ones connected to this
 805          * socket. This does not matter, though. */
 806         ret = bus_rescan_devices(&pcmcia_bus_type);
 807         if (ret)
 808                 printk(KERN_INFO "pcmcia: bus_rescan_devices failed\n");
 809 }
 810
 811 #ifdef CONFIG_PCMCIA_LOAD_CIS
 812
 813 /**
 814  * pcmcia_load_firmware - load CIS from userspace if device-provided is broken
 815  * @dev: the pcmcia device which needs a CIS override
 816  * @filename: requested filename in /lib/firmware/
 817  *
 818  * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if
 819  * the one provided by the card is broken. The firmware files reside in
 820  * /lib/firmware/ in userspace.
 821  */
 822 static int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
 823 {
 824         struct pcmcia_socket *s = dev->socket;
 825         const struct firmware *fw;
 826         char path[FIRMWARE_NAME_MAX];
 827         int ret = -ENOMEM;
 828         int no_funcs;
 829         int old_funcs;
 830         cistpl_longlink_mfc_t mfc;
 831
 832         if (!filename)
 833                 return -EINVAL;
 834
 835         ds_dev_dbg(1, &dev->dev, "trying to load CIS file %s\n", filename);
 836
 837         if (strlen(filename) > (FIRMWARE_NAME_MAX - 1)) {
 838                 dev_printk(KERN_WARNING, &dev->dev,
 839                            "pcmcia: CIS filename is too long [%s]\n",
 840                            filename);
 841                 return -EINVAL;
 842         }
 843
 844         snprintf(path, sizeof(path), "%s", filename);
 845
 846         if (request_firmware(&fw, path, &dev->dev) == 0) {
 847                 if (fw->size >= CISTPL_MAX_CIS_SIZE) {
 848                         ret = -EINVAL;
 849                         dev_printk(KERN_ERR, &dev->dev,
 850                                    "pcmcia: CIS override is too big\n");
 851                         goto release;
 852                 }
 853
 854                 if (!pcmcia_replace_cis(s, fw->data, fw->size))
 855                         ret = 0;
 856                 else {
 857                         dev_printk(KERN_ERR, &dev->dev,
 858                                    "pcmcia: CIS override failed\n");
 859                         goto release;
 860                 }
 861
 862
 863                 /* update information */
 864                 pcmcia_device_query(dev);
 865
 866                 /* does this cis override add or remove functions? */
 867                 old_funcs = s->functions;
 868
 869                 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
 870                         no_funcs = mfc.nfn;
 871                 else
 872                         no_funcs = 1;
 873                 s->functions = no_funcs;
 874
 875                 if (old_funcs > no_funcs)
 876                         pcmcia_card_remove(s, dev);
 877                 else if (no_funcs > old_funcs)
 878                         pcmcia_add_device_later(s, 1);
 879         }
 880  release:
 881         release_firmware(fw);
 882
 883         return (ret);
 884 }
 885
 886 #else /* !CONFIG_PCMCIA_LOAD_CIS */
 887
 888 static inline int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
 889 {
 890         return -ENODEV;
 891 }
 892
 893 #endif
 894
 895
 896 static inline int pcmcia_devmatch(struct pcmcia_device *dev,
 897                                   struct pcmcia_device_id *did)
 898 {
 899         if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
 900                 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
 901                         return 0;
 902         }
 903
 904         if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
 905                 if ((!dev->has_card_id) || (dev->card_id != did->card_id))
 906                         return 0;
 907         }
 908
 909         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
 910                 if (dev->func != did->function)
 911                         return 0;
 912         }
 913
 914         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
 915                 if (!dev->prod_id[0])
 916                         return 0;
 917                 if (strcmp(did->prod_id[0], dev->prod_id[0]))
 918                         return 0;
 919         }
 920
 921         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
 922                 if (!dev->prod_id[1])
 923                         return 0;
 924                 if (strcmp(did->prod_id[1], dev->prod_id[1]))
 925                         return 0;
 926         }
 927
 928         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
 929                 if (!dev->prod_id[2])
 930                         return 0;
 931                 if (strcmp(did->prod_id[2], dev->prod_id[2]))
 932                         return 0;
 933         }
 934
 935         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
 936                 if (!dev->prod_id[3])
 937                         return 0;
 938                 if (strcmp(did->prod_id[3], dev->prod_id[3]))
 939                         return 0;
 940         }
 941
 942         if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
 943                 if (dev->device_no != did->device_no)
 944                         return 0;
 945         }
 946
 947         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
 948                 if ((!dev->has_func_id) || (dev->func_id != did->func_id))
 949                         return 0;
 950
 951                 /* if this is a pseudo-multi-function device,
 952                  * we need explicit matches */
 953                 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO)
 954                         return 0;
 955                 if (dev->device_no)
 956                         return 0;
 957
 958                 /* also, FUNC_ID matching needs to be activated by userspace
 959                  * after it has re-checked that there is no possible module
 960                  * with a prod_id/manf_id/card_id match.
 961                  */
 962                 ds_dev_dbg(0, &dev->dev,
 963                         "skipping FUNC_ID match until userspace interaction\n");
 964                 if (!dev->allow_func_id_match)
 965                         return 0;
 966         }
 967
 968         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
 969                 ds_dev_dbg(0, &dev->dev, "device needs a fake CIS\n");
 970                 if (!dev->socket->fake_cis)
 971                         pcmcia_load_firmware(dev, did->cisfile);
 972
 973                 if (!dev->socket->fake_cis)
 974                         return 0;
 975         }
 976
 977         if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
 978                 int i;
 979                 for (i=0; i<4; i++)
 980                         if (dev->prod_id[i])
 981                                 return 0;
 982                 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
 983                         return 0;
 984         }
 985
 986         dev->dev.driver_data = (void *) did;
 987
 988         return 1;
 989 }
 990
 991
 992 static int pcmcia_bus_match(struct device * dev, struct device_driver * drv) {
 993         struct pcmcia_device * p_dev = to_pcmcia_dev(dev);
 994         struct pcmcia_driver * p_drv = to_pcmcia_drv(drv);
 995         struct pcmcia_device_id *did = p_drv->id_table;
 996         struct pcmcia_dynid *dynid;
 997
 998         /* match dynamic devices first */
 999         spin_lock(&p_drv->dynids.lock);
1000         list_for_each_entry(dynid, &p_drv->dynids.list, node) {
1001                 ds_dev_dbg(3, dev, "trying to match to %s\n", drv->name);
1002                 if (pcmcia_devmatch(p_dev, &dynid->id)) {
1003                         ds_dev_dbg(0, dev, "matched to %s\n", drv->name);
1004                         spin_unlock(&p_drv->dynids.lock);
1005                         return 1;
1006                 }
1007         }
1008         spin_unlock(&p_drv->dynids.lock);
1009
1010 #ifdef CONFIG_PCMCIA_IOCTL
1011         /* matching by cardmgr */
1012         if (p_dev->cardmgr == p_drv) {
1013                 ds_dev_dbg(0, dev, "cardmgr matched to %s\n", drv->name);
1014                 return 1;
1015         }
1016 #endif
1017
1018         while (did && did->match_flags) {
1019                 ds_dev_dbg(3, dev, "trying to match to %s\n", drv->name);
1020                 if (pcmcia_devmatch(p_dev, did)) {
1021                         ds_dev_dbg(0, dev, "matched to %s\n", drv->name);
1022                         return 1;
1023                 }
1024                 did++;
1025         }
1026
1027         return 0;
1028 }
1029
1030 #ifdef CONFIG_HOTPLUG
1031
1032 static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
1033 {
1034         struct pcmcia_device *p_dev;
1035         int i;
1036         u32 hash[4] = { 0, 0, 0, 0};
1037
1038         if (!dev)
1039                 return -ENODEV;
1040
1041         p_dev = to_pcmcia_dev(dev);
1042
1043         /* calculate hashes */
1044         for (i=0; i<4; i++) {
1045                 if (!p_dev->prod_id[i])
1046                         continue;
1047                 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
1048         }
1049
1050         if (add_uevent_var(env, "SOCKET_NO=%u", p_dev->socket->sock))
1051                 return -ENOMEM;
1052
1053         if (add_uevent_var(env, "DEVICE_NO=%02X", p_dev->device_no))
1054                 return -ENOMEM;
1055
1056         if (add_uevent_var(env, "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
1057                            "pa%08Xpb%08Xpc%08Xpd%08X",
1058                            p_dev->has_manf_id ? p_dev->manf_id : 0,
1059                            p_dev->has_card_id ? p_dev->card_id : 0,
1060                            p_dev->has_func_id ? p_dev->func_id : 0,
1061                            p_dev->func,
1062                            p_dev->device_no,
1063                            hash[0],
1064                            hash[1],
1065                            hash[2],
1066                            hash[3]))
1067                 return -ENOMEM;
1068
1069         return 0;
1070 }
1071
1072 #else
1073
1074 static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
1075 {
1076         return -ENODEV;
1077 }
1078
1079 #endif
1080
1081 /************************ runtime PM support ***************************/
1082
1083 static int pcmcia_dev_suspend(struct device *dev, pm_message_t state);
1084 static int pcmcia_dev_resume(struct device *dev);
1085
1086 static int runtime_suspend(struct device *dev)
1087 {
1088         int rc;
1089
1090         down(&dev->sem);
1091         rc = pcmcia_dev_suspend(dev, PMSG_SUSPEND);
1092         up(&dev->sem);
1093         return rc;
1094 }
1095
1096 static void runtime_resume(struct device *dev)
1097 {
1098         int rc;
1099
1100         down(&dev->sem);
1101         rc = pcmcia_dev_resume(dev);
1102         up(&dev->sem);
1103 }
1104
1105 /************************ per-device sysfs output ***************************/
1106
1107 #define pcmcia_device_attr(field, test, format)                         \
1108 static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf)              \
1109 {                                                                       \
1110         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);               \
1111         return p_dev->test ? sprintf (buf, format, p_dev->field) : -ENODEV; \
1112 }
1113
1114 #define pcmcia_device_stringattr(name, field)                                   \
1115 static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf)               \
1116 {                                                                       \
1117         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);               \
1118         return p_dev->field ? sprintf (buf, "%s\n", p_dev->field) : -ENODEV; \
1119 }
1120
1121 pcmcia_device_attr(func, socket, "0x%02x\n");
1122 pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
1123 pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
1124 pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
1125 pcmcia_device_stringattr(prod_id1, prod_id[0]);
1126 pcmcia_device_stringattr(prod_id2, prod_id[1]);
1127 pcmcia_device_stringattr(prod_id3, prod_id[2]);
1128 pcmcia_device_stringattr(prod_id4, prod_id[3]);
1129
1130
1131 static ssize_t pcmcia_show_pm_state(struct device *dev, struct device_attribute *attr, char *buf)
1132 {
1133         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1134
1135         if (p_dev->suspended)
1136                 return sprintf(buf, "off\n");
1137         else
1138                 return sprintf(buf, "on\n");
1139 }
1140
1141 static ssize_t pcmcia_store_pm_state(struct device *dev, struct device_attribute *attr,
1142                                      const char *buf, size_t count)
1143 {
1144         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1145         int ret = 0;
1146
1147         if (!count)
1148                 return -EINVAL;
1149
1150         if ((!p_dev->suspended) && !strncmp(buf, "off", 3))
1151                 ret = runtime_suspend(dev);
1152         else if (p_dev->suspended && !strncmp(buf, "on", 2))
1153                 runtime_resume(dev);
1154
1155         return ret ? ret : count;
1156 }
1157
1158
1159 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1160 {
1161         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1162         int i;
1163         u32 hash[4] = { 0, 0, 0, 0};
1164
1165         /* calculate hashes */
1166         for (i=0; i<4; i++) {
1167                 if (!p_dev->prod_id[i])
1168                         continue;
1169                 hash[i] = crc32(0,p_dev->prod_id[i],strlen(p_dev->prod_id[i]));
1170         }
1171         return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
1172                                 "pa%08Xpb%08Xpc%08Xpd%08X\n",
1173                                 p_dev->has_manf_id ? p_dev->manf_id : 0,
1174                                 p_dev->has_card_id ? p_dev->card_id : 0,
1175                                 p_dev->has_func_id ? p_dev->func_id : 0,
1176                                 p_dev->func, p_dev->device_no,
1177                                 hash[0], hash[1], hash[2], hash[3]);
1178 }
1179
1180 static ssize_t pcmcia_store_allow_func_id_match(struct device *dev,
1181                 struct device_attribute *attr, const char *buf, size_t count)
1182 {
1183         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1184         int ret;
1185
1186         if (!count)
1187                 return -EINVAL;
1188
1189         mutex_lock(&p_dev->socket->skt_mutex);
1190         p_dev->allow_func_id_match = 1;
1191         mutex_unlock(&p_dev->socket->skt_mutex);
1192
1193         ret = bus_rescan_devices(&pcmcia_bus_type);
1194         if (ret)
1195                 printk(KERN_INFO "pcmcia: bus_rescan_devices failed after "
1196                        "allowing func_id matches\n");
1197
1198         return count;
1199 }
1200
1201 static struct device_attribute pcmcia_dev_attrs[] = {
1202         __ATTR(function, 0444, func_show, NULL),
1203         __ATTR(pm_state, 0644, pcmcia_show_pm_state, pcmcia_store_pm_state),
1204         __ATTR_RO(func_id),
1205         __ATTR_RO(manf_id),
1206         __ATTR_RO(card_id),
1207         __ATTR_RO(prod_id1),
1208         __ATTR_RO(prod_id2),
1209         __ATTR_RO(prod_id3),
1210         __ATTR_RO(prod_id4),
1211         __ATTR_RO(modalias),
1212         __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match),
1213         __ATTR_NULL,
1214 };
1215
1216 /* PM support, also needed for reset */
1217
1218 static int pcmcia_dev_suspend(struct device * dev, pm_message_t state)
1219 {
1220         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1221         struct pcmcia_driver *p_drv = NULL;
1222         int ret = 0;
1223
1224         if (p_dev->suspended)
1225                 return 0;
1226
1227         ds_dev_dbg(2, dev, "suspending\n");
1228
1229         if (dev->driver)
1230                 p_drv = to_pcmcia_drv(dev->driver);
1231
1232         if (!p_drv)
1233                 goto out;
1234
1235         if (p_drv->suspend) {
1236                 ret = p_drv->suspend(p_dev);
1237                 if (ret) {
1238                         dev_printk(KERN_ERR, dev,
1239                                    "pcmcia: device %s (driver %s) did "
1240                                    "not want to go to sleep (%d)\n",
1241                                    p_dev->devname, p_drv->drv.name, ret);
1242                         goto out;
1243                 }
1244         }
1245
1246         if (p_dev->device_no == p_dev->func) {
1247                 ds_dev_dbg(2, dev, "releasing configuration\n");
1248                 pcmcia_release_configuration(p_dev);
1249         }
1250
1251  out:
1252         if (!ret)
1253                 p_dev->suspended = 1;
1254         return ret;
1255 }
1256
1257
1258 static int pcmcia_dev_resume(struct device * dev)
1259 {
1260         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1261         struct pcmcia_driver *p_drv = NULL;
1262         int ret = 0;
1263
1264         if (!p_dev->suspended)
1265                 return 0;
1266
1267         ds_dev_dbg(2, dev, "resuming\n");
1268
1269         if (dev->driver)
1270                 p_drv = to_pcmcia_drv(dev->driver);
1271
1272         if (!p_drv)
1273                 goto out;
1274
1275         if (p_dev->device_no == p_dev->func) {
1276                 ds_dev_dbg(2, dev, "requesting configuration\n");
1277                 ret = pcmcia_request_configuration(p_dev, &p_dev->conf);
1278                 if (ret)
1279                         goto out;
1280         }
1281
1282         if (p_drv->resume)
1283                 ret = p_drv->resume(p_dev);
1284
1285  out:
1286         if (!ret)
1287                 p_dev->suspended = 0;
1288         return ret;
1289 }
1290
1291
1292 static int pcmcia_bus_suspend_callback(struct device *dev, void * _data)
1293 {
1294         struct pcmcia_socket *skt = _data;
1295         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1296
1297         if (p_dev->socket != skt || p_dev->suspended)
1298                 return 0;
1299
1300         return runtime_suspend(dev);
1301 }
1302
1303 static int pcmcia_bus_resume_callback(struct device *dev, void * _data)
1304 {
1305         struct pcmcia_socket *skt = _data;
1306         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1307
1308         if (p_dev->socket != skt || !p_dev->suspended)
1309                 return 0;
1310
1311         runtime_resume(dev);
1312
1313         return 0;
1314 }
1315
1316 static int pcmcia_bus_resume(struct pcmcia_socket *skt)
1317 {
1318         ds_dev_dbg(2, &skt->dev, "resuming socket %d\n", skt->sock);
1319         bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback);
1320         return 0;
1321 }
1322
1323 static int pcmcia_bus_suspend(struct pcmcia_socket *skt)
1324 {
1325         ds_dev_dbg(2, &skt->dev, "suspending socket %d\n", skt->sock);
1326         if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt,
1327                              pcmcia_bus_suspend_callback)) {
1328                 pcmcia_bus_resume(skt);
1329                 return -EIO;
1330         }
1331         return 0;
1332 }
1333
1334
1335 /*======================================================================
1336
1337     The card status event handler.
1338
1339 ======================================================================*/
1340
1341 /* Normally, the event is passed to individual drivers after
1342  * informing userspace. Only for CS_EVENT_CARD_REMOVAL this
1343  * is inversed to maintain historic compatibility.
1344  */
1345
1346 static int ds_event(struct pcmcia_socket *skt, event_t event, int priority)
1347 {
1348         struct pcmcia_socket *s = pcmcia_get_socket(skt);
1349
1350         if (!s) {
1351                 dev_printk(KERN_ERR, &skt->dev,
1352                            "PCMCIA obtaining reference to socket "      \
1353                            "failed, event 0x%x lost!\n", event);
1354                 return -ENODEV;
1355         }
1356
1357         ds_dev_dbg(1, &skt->dev, "ds_event(0x%06x, %d, 0x%p)\n",
1358                    event, priority, skt);
1359
1360         switch (event) {
1361         case CS_EVENT_CARD_REMOVAL:
1362                 s->pcmcia_state.present = 0;
1363                 pcmcia_card_remove(skt, NULL);
1364                 handle_event(skt, event);
1365                 break;
1366
1367         case CS_EVENT_CARD_INSERTION:
1368                 s->pcmcia_state.present = 1;
1369                 pcmcia_card_add(skt);
1370                 handle_event(skt, event);
1371                 break;
1372
1373         case CS_EVENT_EJECTION_REQUEST:
1374                 break;
1375
1376         case CS_EVENT_PM_SUSPEND:
1377         case CS_EVENT_PM_RESUME:
1378         case CS_EVENT_RESET_PHYSICAL:
1379         case CS_EVENT_CARD_RESET:
1380         default:
1381                 handle_event(skt, event);
1382                 break;
1383     }
1384
1385     pcmcia_put_socket(s);
1386
1387     return 0;
1388 } /* ds_event */
1389
1390
1391 struct pcmcia_device * pcmcia_dev_present(struct pcmcia_device *_p_dev)
1392 {
1393         struct pcmcia_device *p_dev;
1394         struct pcmcia_device *ret = NULL;
1395
1396         p_dev = pcmcia_get_dev(_p_dev);
1397         if (!p_dev)
1398                 return NULL;
1399
1400         if (!p_dev->socket->pcmcia_state.present)
1401                 goto out;
1402
1403         if (p_dev->_removed)
1404                 goto out;
1405
1406         if (p_dev->suspended)
1407                 goto out;
1408
1409         ret = p_dev;
1410  out:
1411         pcmcia_put_dev(p_dev);
1412         return ret;
1413 }
1414 EXPORT_SYMBOL(pcmcia_dev_present);
1415
1416
1417 static struct pcmcia_callback pcmcia_bus_callback = {
1418         .owner = THIS_MODULE,
1419         .event = ds_event,
1420         .requery = pcmcia_bus_rescan,
1421         .suspend = pcmcia_bus_suspend,
1422         .resume = pcmcia_bus_resume,
1423 };
1424
1425 static int __devinit pcmcia_bus_add_socket(struct device *dev,
1426                                            struct class_interface *class_intf)
1427 {
1428         struct pcmcia_socket *socket = dev_get_drvdata(dev);
1429         int ret;
1430
1431         socket = pcmcia_get_socket(socket);
1432         if (!socket) {
1433                 dev_printk(KERN_ERR, dev,
1434                            "PCMCIA obtaining reference to socket failed\n");
1435                 return -ENODEV;
1436         }
1437
1438         /*
1439          * Ugly. But we want to wait for the socket threads to have started up.
1440          * We really should let the drivers themselves drive some of this..
1441          */
1442         msleep(250);
1443
1444 #ifdef CONFIG_PCMCIA_IOCTL
1445         init_waitqueue_head(&socket->queue);
1446 #endif
1447         INIT_LIST_HEAD(&socket->devices_list);
1448         INIT_WORK(&socket->device_add, pcmcia_delayed_add_device);
1449         memset(&socket->pcmcia_state, 0, sizeof(u8));
1450         socket->device_count = 0;
1451
1452         ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback);
1453         if (ret) {
1454                 dev_printk(KERN_ERR, dev, "PCMCIA registration failed\n");
1455                 pcmcia_put_socket(socket);
1456                 return (ret);
1457         }
1458
1459         return 0;
1460 }
1461
1462 static void pcmcia_bus_remove_socket(struct device *dev,
1463                                      struct class_interface *class_intf)
1464 {
1465         struct pcmcia_socket *socket = dev_get_drvdata(dev);
1466
1467         if (!socket)
1468                 return;
1469
1470         socket->pcmcia_state.dead = 1;
1471         pccard_register_pcmcia(socket, NULL);
1472
1473         /* unregister any unbound devices */
1474         mutex_lock(&socket->skt_mutex);
1475         pcmcia_card_remove(socket, NULL);
1476         mutex_unlock(&socket->skt_mutex);
1477
1478         pcmcia_put_socket(socket);
1479
1480         return;
1481 }
1482
1483
1484 /* the pcmcia_bus_interface is used to handle pcmcia socket devices */
1485 static struct class_interface pcmcia_bus_interface __refdata = {
1486         .class = &pcmcia_socket_class,
1487         .add_dev = &pcmcia_bus_add_socket,
1488         .remove_dev = &pcmcia_bus_remove_socket,
1489 };
1490
1491
1492 struct bus_type pcmcia_bus_type = {
1493         .name = "pcmcia",
1494         .uevent = pcmcia_bus_uevent,
1495         .match = pcmcia_bus_match,
1496         .dev_attrs = pcmcia_dev_attrs,
1497         .probe = pcmcia_device_probe,
1498         .remove = pcmcia_device_remove,
1499         .suspend = pcmcia_dev_suspend,
1500         .resume = pcmcia_dev_resume,
1501 };
1502
1503
1504 static int __init init_pcmcia_bus(void)
1505 {
1506         int ret;
1507
1508         spin_lock_init(&pcmcia_dev_list_lock);
1509
1510         ret = bus_register(&pcmcia_bus_type);
1511         if (ret < 0) {
1512                 printk(KERN_WARNING "pcmcia: bus_register error: %d\n", ret);
1513                 return ret;
1514         }
1515         ret = class_interface_register(&pcmcia_bus_interface);
1516         if (ret < 0) {
1517                 printk(KERN_WARNING
1518                         "pcmcia: class_interface_register error: %d\n", ret);
1519                 bus_unregister(&pcmcia_bus_type);
1520                 return ret;
1521         }
1522
1523         pcmcia_setup_ioctl();
1524
1525         return 0;
1526 }
1527 fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that
1528                                * pcmcia_socket_class is already registered */
1529
1530
1531 static void __exit exit_pcmcia_bus(void)
1532 {
1533         pcmcia_cleanup_ioctl();
1534
1535         class_interface_unregister(&pcmcia_bus_interface);
1536
1537         bus_unregister(&pcmcia_bus_type);
1538 }
1539 module_exit(exit_pcmcia_bus);
1540
1541
1542 MODULE_ALIAS("ds");