git.oblomov.eu Git - 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
  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         /* The PCMCIA code passes the match data in via dev->driver_data
 398          * which is an ugly hack. Once the driver probe is called it may
 399          * and often will overwrite the match data so we must save it first
 400          *
 401          * handle pseudo multifunction devices:
 402          * there are at most two pseudo multifunction devices.
 403          * if we're matching against the first, schedule a
 404          * call which will then check whether there are two
 405          * pseudo devices, and if not, add the second one.
 406          */
 407         did = p_dev->dev.driver_data;
 408
 409         ds_dev_dbg(1, dev, "trying to bind to %s\n", p_drv->drv.name);
 410
 411         if ((!p_drv->probe) || (!p_dev->function_config) ||
 412             (!try_module_get(p_drv->owner))) {
 413                 ret = -EINVAL;
 414                 goto put_dev;
 415         }
 416
 417         /* set up some more device information */
 418         ret = pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_CONFIG,
 419                                 &cis_config);
 420         if (!ret) {
 421                 p_dev->conf.ConfigBase = cis_config.base;
 422                 p_dev->conf.Present = cis_config.rmask[0];
 423         } else {
 424                 dev_printk(KERN_INFO, dev,
 425                            "pcmcia: could not parse base and rmask0 of CIS\n");
 426                 p_dev->conf.ConfigBase = 0;
 427                 p_dev->conf.Present = 0;
 428         }
 429
 430         ret = p_drv->probe(p_dev);
 431         if (ret) {
 432                 ds_dev_dbg(1, dev, "binding to %s failed with %d\n",
 433                            p_drv->drv.name, ret);
 434                 goto put_module;
 435         }
 436
 437         if (did && (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) &&
 438             (p_dev->socket->device_count == 1) && (p_dev->device_no == 0))
 439                 pcmcia_add_device_later(p_dev->socket, 0);
 440
 441 put_module:
 442         if (ret)
 443                 module_put(p_drv->owner);
 444 put_dev:
 445         if (ret)
 446                 put_device(dev);
 447         return (ret);
 448 }
 449
 450
 451 /*
 452  * Removes a PCMCIA card from the device tree and socket list.
 453  */
 454 static void pcmcia_card_remove(struct pcmcia_socket *s, struct pcmcia_device *leftover)
 455 {
 456         struct pcmcia_device    *p_dev;
 457         struct pcmcia_device    *tmp;
 458         unsigned long           flags;
 459
 460         ds_dev_dbg(2, leftover ? &leftover->dev : &s->dev,
 461                    "pcmcia_card_remove(%d) %s\n", s->sock,
 462                    leftover ? leftover->devname : "");
 463
 464         if (!leftover)
 465                 s->device_count = 0;
 466         else
 467                 s->device_count = 1;
 468
 469         /* unregister all pcmcia_devices registered with this socket, except leftover */
 470         list_for_each_entry_safe(p_dev, tmp, &s->devices_list, socket_device_list) {
 471                 if (p_dev == leftover)
 472                         continue;
 473
 474                 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 475                 list_del(&p_dev->socket_device_list);
 476                 p_dev->_removed=1;
 477                 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 478
 479                 ds_dev_dbg(2, &p_dev->dev, "unregistering device\n");
 480                 device_unregister(&p_dev->dev);
 481         }
 482
 483         return;
 484 }
 485
 486 static int pcmcia_device_remove(struct device * dev)
 487 {
 488         struct pcmcia_device *p_dev;
 489         struct pcmcia_driver *p_drv;
 490         struct pcmcia_device_id *did;
 491         int i;
 492
 493         p_dev = to_pcmcia_dev(dev);
 494         p_drv = to_pcmcia_drv(dev->driver);
 495
 496         ds_dev_dbg(1, dev, "removing device\n");
 497
 498         /* If we're removing the primary module driving a
 499          * pseudo multi-function card, we need to unbind
 500          * all devices
 501          */
 502         did = p_dev->dev.driver_data;
 503         if (did && (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) &&
 504             (p_dev->socket->device_count != 0) &&
 505             (p_dev->device_no == 0))
 506                 pcmcia_card_remove(p_dev->socket, p_dev);
 507
 508         /* detach the "instance" */
 509         if (!p_drv)
 510                 return 0;
 511
 512         if (p_drv->remove)
 513                 p_drv->remove(p_dev);
 514
 515         p_dev->dev_node = NULL;
 516
 517         /* check for proper unloading */
 518         if (p_dev->_irq || p_dev->_io || p_dev->_locked)
 519                 dev_printk(KERN_INFO, dev,
 520                         "pcmcia: driver %s did not release config properly\n",
 521                         p_drv->drv.name);
 522
 523         for (i = 0; i < MAX_WIN; i++)
 524                 if (p_dev->_win & CLIENT_WIN_REQ(i))
 525                         dev_printk(KERN_INFO, dev,
 526                           "pcmcia: driver %s did not release window properly\n",
 527                            p_drv->drv.name);
 528
 529         /* references from pcmcia_probe_device */
 530         pcmcia_put_dev(p_dev);
 531         module_put(p_drv->owner);
 532
 533         return 0;
 534 }
 535
 536
 537 /*
 538  * pcmcia_device_query -- determine information about a pcmcia device
 539  */
 540 static int pcmcia_device_query(struct pcmcia_device *p_dev)
 541 {
 542         cistpl_manfid_t manf_id;
 543         cistpl_funcid_t func_id;
 544         cistpl_vers_1_t *vers1;
 545         unsigned int i;
 546
 547         vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL);
 548         if (!vers1)
 549                 return -ENOMEM;
 550
 551         if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 552                                CISTPL_MANFID, &manf_id)) {
 553                 p_dev->manf_id = manf_id.manf;
 554                 p_dev->card_id = manf_id.card;
 555                 p_dev->has_manf_id = 1;
 556                 p_dev->has_card_id = 1;
 557         }
 558
 559         if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 560                                CISTPL_FUNCID, &func_id)) {
 561                 p_dev->func_id = func_id.func;
 562                 p_dev->has_func_id = 1;
 563         } else {
 564                 /* rule of thumb: cards with no FUNCID, but with
 565                  * common memory device geometry information, are
 566                  * probably memory cards (from pcmcia-cs) */
 567                 cistpl_device_geo_t *devgeo;
 568
 569                 devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL);
 570                 if (!devgeo) {
 571                         kfree(vers1);
 572                         return -ENOMEM;
 573                 }
 574                 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 575                                       CISTPL_DEVICE_GEO, devgeo)) {
 576                         ds_dev_dbg(0, &p_dev->dev,
 577                                    "mem device geometry probably means "
 578                                    "FUNCID_MEMORY\n");
 579                         p_dev->func_id = CISTPL_FUNCID_MEMORY;
 580                         p_dev->has_func_id = 1;
 581                 }
 582                 kfree(devgeo);
 583         }
 584
 585         if (!pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_VERS_1,
 586                                vers1)) {
 587                 for (i=0; i < vers1->ns; i++) {
 588                         char *tmp;
 589                         unsigned int length;
 590
 591                         tmp = vers1->str + vers1->ofs[i];
 592
 593                         length = strlen(tmp) + 1;
 594                         if ((length < 2) || (length > 255))
 595                                 continue;
 596
 597                         p_dev->prod_id[i] = kmalloc(sizeof(char) * length,
 598                                                     GFP_KERNEL);
 599                         if (!p_dev->prod_id[i])
 600                                 continue;
 601
 602                         p_dev->prod_id[i] = strncpy(p_dev->prod_id[i],
 603                                                     tmp, length);
 604                 }
 605         }
 606
 607         kfree(vers1);
 608         return 0;
 609 }
 610
 611
 612 /* device_add_lock is needed to avoid double registration by cardmgr and kernel.
 613  * Serializes pcmcia_device_add; will most likely be removed in future.
 614  *
 615  * While it has the caveat that adding new PCMCIA devices inside(!) device_register()
 616  * won't work, this doesn't matter much at the moment: the driver core doesn't
 617  * support it either.
 618  */
 619 static DEFINE_MUTEX(device_add_lock);
 620
 621 struct pcmcia_device * pcmcia_device_add(struct pcmcia_socket *s, unsigned int function)
 622 {
 623         struct pcmcia_device *p_dev, *tmp_dev;
 624         unsigned long flags;
 625
 626         s = pcmcia_get_socket(s);
 627         if (!s)
 628                 return NULL;
 629
 630         mutex_lock(&device_add_lock);
 631
 632         ds_dbg(3, "adding device to %d, function %d\n", s->sock, function);
 633
 634         /* max of 4 devices per card */
 635         if (s->device_count == 4)
 636                 goto err_put;
 637
 638         p_dev = kzalloc(sizeof(struct pcmcia_device), GFP_KERNEL);
 639         if (!p_dev)
 640                 goto err_put;
 641
 642         p_dev->socket = s;
 643         p_dev->device_no = (s->device_count++);
 644         p_dev->func   = function;
 645
 646         p_dev->dev.bus = &pcmcia_bus_type;
 647         p_dev->dev.parent = s->dev.parent;
 648         p_dev->dev.release = pcmcia_release_dev;
 649         /* by default don't allow DMA */
 650         p_dev->dma_mask = DMA_MASK_NONE;
 651         p_dev->dev.dma_mask = &p_dev->dma_mask;
 652         dev_set_name(&p_dev->dev, "%d.%d", p_dev->socket->sock, p_dev->device_no);
 653         if (!dev_name(&p_dev->dev))
 654                 goto err_free;
 655         p_dev->devname = kasprintf(GFP_KERNEL, "pcmcia%s", dev_name(&p_dev->dev));
 656         if (!p_dev->devname)
 657                 goto err_free;
 658         ds_dev_dbg(3, &p_dev->dev, "devname is %s\n", p_dev->devname);
 659
 660         spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 661
 662         /*
 663          * p_dev->function_config must be the same for all card functions.
 664          * Note that this is serialized by the device_add_lock, so that
 665          * only one such struct will be created.
 666          */
 667         list_for_each_entry(tmp_dev, &s->devices_list, socket_device_list)
 668                 if (p_dev->func == tmp_dev->func) {
 669                         p_dev->function_config = tmp_dev->function_config;
 670                         p_dev->io = tmp_dev->io;
 671                         p_dev->irq = tmp_dev->irq;
 672                         kref_get(&p_dev->function_config->ref);
 673                 }
 674
 675         /* Add to the list in pcmcia_bus_socket */
 676         list_add(&p_dev->socket_device_list, &s->devices_list);
 677
 678         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 679
 680         if (!p_dev->function_config) {
 681                 ds_dev_dbg(3, &p_dev->dev, "creating config_t\n");
 682                 p_dev->function_config = kzalloc(sizeof(struct config_t),
 683                                                  GFP_KERNEL);
 684                 if (!p_dev->function_config)
 685                         goto err_unreg;
 686                 kref_init(&p_dev->function_config->ref);
 687         }
 688
 689         dev_printk(KERN_NOTICE, &p_dev->dev,
 690                    "pcmcia: registering new device %s\n",
 691                    p_dev->devname);
 692
 693         pcmcia_device_query(p_dev);
 694
 695         if (device_register(&p_dev->dev))
 696                 goto err_unreg;
 697
 698         mutex_unlock(&device_add_lock);
 699
 700         return p_dev;
 701
 702  err_unreg:
 703         spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 704         list_del(&p_dev->socket_device_list);
 705         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 706
 707  err_free:
 708         kfree(p_dev->devname);
 709         kfree(p_dev);
 710         s->device_count--;
 711  err_put:
 712         mutex_unlock(&device_add_lock);
 713         pcmcia_put_socket(s);
 714
 715         return NULL;
 716 }
 717
 718
 719 static int pcmcia_card_add(struct pcmcia_socket *s)
 720 {
 721         cistpl_longlink_mfc_t mfc;
 722         unsigned int no_funcs, i, no_chains;
 723         int ret = 0;
 724
 725         if (!(s->resource_setup_done)) {
 726                 ds_dev_dbg(3, &s->dev,
 727                            "no resources available, delaying card_add\n");
 728                 return -EAGAIN; /* try again, but later... */
 729         }
 730
 731         if (pcmcia_validate_mem(s)) {
 732                 ds_dev_dbg(3, &s->dev, "validating mem resources failed, "
 733                        "delaying card_add\n");
 734                 return -EAGAIN; /* try again, but later... */
 735         }
 736
 737         ret = pccard_validate_cis(s, BIND_FN_ALL, &no_chains);
 738         if (ret || !no_chains) {
 739                 ds_dev_dbg(0, &s->dev, "invalid CIS or invalid resources\n");
 740                 return -ENODEV;
 741         }
 742
 743         if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
 744                 no_funcs = mfc.nfn;
 745         else
 746                 no_funcs = 1;
 747         s->functions = no_funcs;
 748
 749         for (i=0; i < no_funcs; i++)
 750                 pcmcia_device_add(s, i);
 751
 752         return (ret);
 753 }
 754
 755
 756 static void pcmcia_delayed_add_device(struct work_struct *work)
 757 {
 758         struct pcmcia_socket *s =
 759                 container_of(work, struct pcmcia_socket, device_add);
 760         ds_dev_dbg(1, &s->dev, "adding additional device to %d\n", s->sock);
 761         pcmcia_device_add(s, s->pcmcia_state.mfc_pfc);
 762         s->pcmcia_state.device_add_pending = 0;
 763         s->pcmcia_state.mfc_pfc = 0;
 764 }
 765
 766 static int pcmcia_requery(struct device *dev, void * _data)
 767 {
 768         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 769         if (!p_dev->dev.driver) {
 770                 ds_dev_dbg(1, dev, "update device information\n");
 771                 pcmcia_device_query(p_dev);
 772         }
 773
 774         return 0;
 775 }
 776
 777 static void pcmcia_bus_rescan(struct pcmcia_socket *skt, int new_cis)
 778 {
 779         int no_devices = 0;
 780         int ret = 0;
 781         unsigned long flags;
 782
 783         /* must be called with skt_mutex held */
 784         ds_dev_dbg(0, &skt->dev, "re-scanning socket %d\n", skt->sock);
 785
 786         spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 787         if (list_empty(&skt->devices_list))
 788                 no_devices = 1;
 789         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 790
 791         /* If this is because of a CIS override, start over */
 792         if (new_cis && !no_devices)
 793                 pcmcia_card_remove(skt, NULL);
 794
 795         /* if no devices were added for this socket yet because of
 796          * missing resource information or other trouble, we need to
 797          * do this now. */
 798         if (no_devices || new_cis) {
 799                 ret = pcmcia_card_add(skt);
 800                 if (ret)
 801                         return;
 802         }
 803
 804         /* some device information might have changed because of a CIS
 805          * update or because we can finally read it correctly... so
 806          * determine it again, overwriting old values if necessary. */
 807         bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery);
 808
 809         /* we re-scan all devices, not just the ones connected to this
 810          * socket. This does not matter, though. */
 811         ret = bus_rescan_devices(&pcmcia_bus_type);
 812         if (ret)
 813                 printk(KERN_INFO "pcmcia: bus_rescan_devices failed\n");
 814 }
 815
 816 #ifdef CONFIG_PCMCIA_LOAD_CIS
 817
 818 /**
 819  * pcmcia_load_firmware - load CIS from userspace if device-provided is broken
 820  * @dev: the pcmcia device which needs a CIS override
 821  * @filename: requested filename in /lib/firmware/
 822  *
 823  * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if
 824  * the one provided by the card is broken. The firmware files reside in
 825  * /lib/firmware/ in userspace.
 826  */
 827 static int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
 828 {
 829         struct pcmcia_socket *s = dev->socket;
 830         const struct firmware *fw;
 831         char path[FIRMWARE_NAME_MAX];
 832         int ret = -ENOMEM;
 833         int no_funcs;
 834         int old_funcs;
 835         cistpl_longlink_mfc_t mfc;
 836
 837         if (!filename)
 838                 return -EINVAL;
 839
 840         ds_dev_dbg(1, &dev->dev, "trying to load CIS file %s\n", filename);
 841
 842         if (strlen(filename) > (FIRMWARE_NAME_MAX - 1)) {
 843                 dev_printk(KERN_WARNING, &dev->dev,
 844                            "pcmcia: CIS filename is too long [%s]\n",
 845                            filename);
 846                 return -EINVAL;
 847         }
 848
 849         snprintf(path, sizeof(path), "%s", filename);
 850
 851         if (request_firmware(&fw, path, &dev->dev) == 0) {
 852                 if (fw->size >= CISTPL_MAX_CIS_SIZE) {
 853                         ret = -EINVAL;
 854                         dev_printk(KERN_ERR, &dev->dev,
 855                                    "pcmcia: CIS override is too big\n");
 856                         goto release;
 857                 }
 858
 859                 if (!pcmcia_replace_cis(s, fw->data, fw->size))
 860                         ret = 0;
 861                 else {
 862                         dev_printk(KERN_ERR, &dev->dev,
 863                                    "pcmcia: CIS override failed\n");
 864                         goto release;
 865                 }
 866
 867
 868                 /* update information */
 869                 pcmcia_device_query(dev);
 870
 871                 /* does this cis override add or remove functions? */
 872                 old_funcs = s->functions;
 873
 874                 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
 875                         no_funcs = mfc.nfn;
 876                 else
 877                         no_funcs = 1;
 878                 s->functions = no_funcs;
 879
 880                 if (old_funcs > no_funcs)
 881                         pcmcia_card_remove(s, dev);
 882                 else if (no_funcs > old_funcs)
 883                         pcmcia_add_device_later(s, 1);
 884         }
 885  release:
 886         release_firmware(fw);
 887
 888         return (ret);
 889 }
 890
 891 #else /* !CONFIG_PCMCIA_LOAD_CIS */
 892
 893 static inline int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
 894 {
 895         return -ENODEV;
 896 }
 897
 898 #endif
 899
 900
 901 static inline int pcmcia_devmatch(struct pcmcia_device *dev,
 902                                   struct pcmcia_device_id *did)
 903 {
 904         if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
 905                 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
 906                         return 0;
 907         }
 908
 909         if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
 910                 if ((!dev->has_card_id) || (dev->card_id != did->card_id))
 911                         return 0;
 912         }
 913
 914         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
 915                 if (dev->func != did->function)
 916                         return 0;
 917         }
 918
 919         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
 920                 if (!dev->prod_id[0])
 921                         return 0;
 922                 if (strcmp(did->prod_id[0], dev->prod_id[0]))
 923                         return 0;
 924         }
 925
 926         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
 927                 if (!dev->prod_id[1])
 928                         return 0;
 929                 if (strcmp(did->prod_id[1], dev->prod_id[1]))
 930                         return 0;
 931         }
 932
 933         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
 934                 if (!dev->prod_id[2])
 935                         return 0;
 936                 if (strcmp(did->prod_id[2], dev->prod_id[2]))
 937                         return 0;
 938         }
 939
 940         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
 941                 if (!dev->prod_id[3])
 942                         return 0;
 943                 if (strcmp(did->prod_id[3], dev->prod_id[3]))
 944                         return 0;
 945         }
 946
 947         if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
 948                 if (dev->device_no != did->device_no)
 949                         return 0;
 950         }
 951
 952         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
 953                 if ((!dev->has_func_id) || (dev->func_id != did->func_id))
 954                         return 0;
 955
 956                 /* if this is a pseudo-multi-function device,
 957                  * we need explicit matches */
 958                 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO)
 959                         return 0;
 960                 if (dev->device_no)
 961                         return 0;
 962
 963                 /* also, FUNC_ID matching needs to be activated by userspace
 964                  * after it has re-checked that there is no possible module
 965                  * with a prod_id/manf_id/card_id match.
 966                  */
 967                 ds_dev_dbg(0, &dev->dev,
 968                         "skipping FUNC_ID match until userspace interaction\n");
 969                 if (!dev->allow_func_id_match)
 970                         return 0;
 971         }
 972
 973         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
 974                 ds_dev_dbg(0, &dev->dev, "device needs a fake CIS\n");
 975                 if (!dev->socket->fake_cis)
 976                         pcmcia_load_firmware(dev, did->cisfile);
 977
 978                 if (!dev->socket->fake_cis)
 979                         return 0;
 980         }
 981
 982         if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
 983                 int i;
 984                 for (i=0; i<4; i++)
 985                         if (dev->prod_id[i])
 986                                 return 0;
 987                 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
 988                         return 0;
 989         }
 990
 991         dev->dev.driver_data = (void *) did;
 992
 993         return 1;
 994 }
 995
 996
 997 static int pcmcia_bus_match(struct device * dev, struct device_driver * drv) {
 998         struct pcmcia_device * p_dev = to_pcmcia_dev(dev);
 999         struct pcmcia_driver * p_drv = to_pcmcia_drv(drv);
1000         struct pcmcia_device_id *did = p_drv->id_table;
1001         struct pcmcia_dynid *dynid;
1002
1003         /* match dynamic devices first */
1004         spin_lock(&p_drv->dynids.lock);
1005         list_for_each_entry(dynid, &p_drv->dynids.list, node) {
1006                 ds_dev_dbg(3, dev, "trying to match to %s\n", drv->name);
1007                 if (pcmcia_devmatch(p_dev, &dynid->id)) {
1008                         ds_dev_dbg(0, dev, "matched to %s\n", drv->name);
1009                         spin_unlock(&p_drv->dynids.lock);
1010                         return 1;
1011                 }
1012         }
1013         spin_unlock(&p_drv->dynids.lock);
1014
1015 #ifdef CONFIG_PCMCIA_IOCTL
1016         /* matching by cardmgr */
1017         if (p_dev->cardmgr == p_drv) {
1018                 ds_dev_dbg(0, dev, "cardmgr matched to %s\n", drv->name);
1019                 return 1;
1020         }
1021 #endif
1022
1023         while (did && did->match_flags) {
1024                 ds_dev_dbg(3, dev, "trying to match to %s\n", drv->name);
1025                 if (pcmcia_devmatch(p_dev, did)) {
1026                         ds_dev_dbg(0, dev, "matched to %s\n", drv->name);
1027                         return 1;
1028                 }
1029                 did++;
1030         }
1031
1032         return 0;
1033 }
1034
1035 #ifdef CONFIG_HOTPLUG
1036
1037 static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
1038 {
1039         struct pcmcia_device *p_dev;
1040         int i;
1041         u32 hash[4] = { 0, 0, 0, 0};
1042
1043         if (!dev)
1044                 return -ENODEV;
1045
1046         p_dev = to_pcmcia_dev(dev);
1047
1048         /* calculate hashes */
1049         for (i=0; i<4; i++) {
1050                 if (!p_dev->prod_id[i])
1051                         continue;
1052                 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
1053         }
1054
1055         if (add_uevent_var(env, "SOCKET_NO=%u", p_dev->socket->sock))
1056                 return -ENOMEM;
1057
1058         if (add_uevent_var(env, "DEVICE_NO=%02X", p_dev->device_no))
1059                 return -ENOMEM;
1060
1061         if (add_uevent_var(env, "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
1062                            "pa%08Xpb%08Xpc%08Xpd%08X",
1063                            p_dev->has_manf_id ? p_dev->manf_id : 0,
1064                            p_dev->has_card_id ? p_dev->card_id : 0,
1065                            p_dev->has_func_id ? p_dev->func_id : 0,
1066                            p_dev->func,
1067                            p_dev->device_no,
1068                            hash[0],
1069                            hash[1],
1070                            hash[2],
1071                            hash[3]))
1072                 return -ENOMEM;
1073
1074         return 0;
1075 }
1076
1077 #else
1078
1079 static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
1080 {
1081         return -ENODEV;
1082 }
1083
1084 #endif
1085
1086 /************************ runtime PM support ***************************/
1087
1088 static int pcmcia_dev_suspend(struct device *dev, pm_message_t state);
1089 static int pcmcia_dev_resume(struct device *dev);
1090
1091 static int runtime_suspend(struct device *dev)
1092 {
1093         int rc;
1094
1095         down(&dev->sem);
1096         rc = pcmcia_dev_suspend(dev, PMSG_SUSPEND);
1097         up(&dev->sem);
1098         return rc;
1099 }
1100
1101 static void runtime_resume(struct device *dev)
1102 {
1103         int rc;
1104
1105         down(&dev->sem);
1106         rc = pcmcia_dev_resume(dev);
1107         up(&dev->sem);
1108 }
1109
1110 /************************ per-device sysfs output ***************************/
1111
1112 #define pcmcia_device_attr(field, test, format)                         \
1113 static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf)              \
1114 {                                                                       \
1115         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);               \
1116         return p_dev->test ? sprintf (buf, format, p_dev->field) : -ENODEV; \
1117 }
1118
1119 #define pcmcia_device_stringattr(name, field)                                   \
1120 static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf)               \
1121 {                                                                       \
1122         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);               \
1123         return p_dev->field ? sprintf (buf, "%s\n", p_dev->field) : -ENODEV; \
1124 }
1125
1126 pcmcia_device_attr(func, socket, "0x%02x\n");
1127 pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
1128 pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
1129 pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
1130 pcmcia_device_stringattr(prod_id1, prod_id[0]);
1131 pcmcia_device_stringattr(prod_id2, prod_id[1]);
1132 pcmcia_device_stringattr(prod_id3, prod_id[2]);
1133 pcmcia_device_stringattr(prod_id4, prod_id[3]);
1134
1135
1136 static ssize_t pcmcia_show_pm_state(struct device *dev, struct device_attribute *attr, char *buf)
1137 {
1138         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1139
1140         if (p_dev->suspended)
1141                 return sprintf(buf, "off\n");
1142         else
1143                 return sprintf(buf, "on\n");
1144 }
1145
1146 static ssize_t pcmcia_store_pm_state(struct device *dev, struct device_attribute *attr,
1147                                      const char *buf, size_t count)
1148 {
1149         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1150         int ret = 0;
1151
1152         if (!count)
1153                 return -EINVAL;
1154
1155         if ((!p_dev->suspended) && !strncmp(buf, "off", 3))
1156                 ret = runtime_suspend(dev);
1157         else if (p_dev->suspended && !strncmp(buf, "on", 2))
1158                 runtime_resume(dev);
1159
1160         return ret ? ret : count;
1161 }
1162
1163
1164 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1165 {
1166         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1167         int i;
1168         u32 hash[4] = { 0, 0, 0, 0};
1169
1170         /* calculate hashes */
1171         for (i=0; i<4; i++) {
1172                 if (!p_dev->prod_id[i])
1173                         continue;
1174                 hash[i] = crc32(0,p_dev->prod_id[i],strlen(p_dev->prod_id[i]));
1175         }
1176         return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
1177                                 "pa%08Xpb%08Xpc%08Xpd%08X\n",
1178                                 p_dev->has_manf_id ? p_dev->manf_id : 0,
1179                                 p_dev->has_card_id ? p_dev->card_id : 0,
1180                                 p_dev->has_func_id ? p_dev->func_id : 0,
1181                                 p_dev->func, p_dev->device_no,
1182                                 hash[0], hash[1], hash[2], hash[3]);
1183 }
1184
1185 static ssize_t pcmcia_store_allow_func_id_match(struct device *dev,
1186                 struct device_attribute *attr, const char *buf, size_t count)
1187 {
1188         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1189         int ret;
1190
1191         if (!count)
1192                 return -EINVAL;
1193
1194         mutex_lock(&p_dev->socket->skt_mutex);
1195         p_dev->allow_func_id_match = 1;
1196         mutex_unlock(&p_dev->socket->skt_mutex);
1197
1198         ret = bus_rescan_devices(&pcmcia_bus_type);
1199         if (ret)
1200                 printk(KERN_INFO "pcmcia: bus_rescan_devices failed after "
1201                        "allowing func_id matches\n");
1202
1203         return count;
1204 }
1205
1206 static struct device_attribute pcmcia_dev_attrs[] = {
1207         __ATTR(function, 0444, func_show, NULL),
1208         __ATTR(pm_state, 0644, pcmcia_show_pm_state, pcmcia_store_pm_state),
1209         __ATTR_RO(func_id),
1210         __ATTR_RO(manf_id),
1211         __ATTR_RO(card_id),
1212         __ATTR_RO(prod_id1),
1213         __ATTR_RO(prod_id2),
1214         __ATTR_RO(prod_id3),
1215         __ATTR_RO(prod_id4),
1216         __ATTR_RO(modalias),
1217         __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match),
1218         __ATTR_NULL,
1219 };
1220
1221 /* PM support, also needed for reset */
1222
1223 static int pcmcia_dev_suspend(struct device * dev, pm_message_t state)
1224 {
1225         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1226         struct pcmcia_driver *p_drv = NULL;
1227         int ret = 0;
1228
1229         if (p_dev->suspended)
1230                 return 0;
1231
1232         ds_dev_dbg(2, dev, "suspending\n");
1233
1234         if (dev->driver)
1235                 p_drv = to_pcmcia_drv(dev->driver);
1236
1237         if (!p_drv)
1238                 goto out;
1239
1240         if (p_drv->suspend) {
1241                 ret = p_drv->suspend(p_dev);
1242                 if (ret) {
1243                         dev_printk(KERN_ERR, dev,
1244                                    "pcmcia: device %s (driver %s) did "
1245                                    "not want to go to sleep (%d)\n",
1246                                    p_dev->devname, p_drv->drv.name, ret);
1247                         goto out;
1248                 }
1249         }
1250
1251         if (p_dev->device_no == p_dev->func) {
1252                 ds_dev_dbg(2, dev, "releasing configuration\n");
1253                 pcmcia_release_configuration(p_dev);
1254         }
1255
1256  out:
1257         if (!ret)
1258                 p_dev->suspended = 1;
1259         return ret;
1260 }
1261
1262
1263 static int pcmcia_dev_resume(struct device * dev)
1264 {
1265         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1266         struct pcmcia_driver *p_drv = NULL;
1267         int ret = 0;
1268
1269         if (!p_dev->suspended)
1270                 return 0;
1271
1272         ds_dev_dbg(2, dev, "resuming\n");
1273
1274         if (dev->driver)
1275                 p_drv = to_pcmcia_drv(dev->driver);
1276
1277         if (!p_drv)
1278                 goto out;
1279
1280         if (p_dev->device_no == p_dev->func) {
1281                 ds_dev_dbg(2, dev, "requesting configuration\n");
1282                 ret = pcmcia_request_configuration(p_dev, &p_dev->conf);
1283                 if (ret)
1284                         goto out;
1285         }
1286
1287         if (p_drv->resume)
1288                 ret = p_drv->resume(p_dev);
1289
1290  out:
1291         if (!ret)
1292                 p_dev->suspended = 0;
1293         return ret;
1294 }
1295
1296
1297 static int pcmcia_bus_suspend_callback(struct device *dev, void * _data)
1298 {
1299         struct pcmcia_socket *skt = _data;
1300         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1301
1302         if (p_dev->socket != skt || p_dev->suspended)
1303                 return 0;
1304
1305         return runtime_suspend(dev);
1306 }
1307
1308 static int pcmcia_bus_resume_callback(struct device *dev, void * _data)
1309 {
1310         struct pcmcia_socket *skt = _data;
1311         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1312
1313         if (p_dev->socket != skt || !p_dev->suspended)
1314                 return 0;
1315
1316         runtime_resume(dev);
1317
1318         return 0;
1319 }
1320
1321 static int pcmcia_bus_resume(struct pcmcia_socket *skt)
1322 {
1323         ds_dev_dbg(2, &skt->dev, "resuming socket %d\n", skt->sock);
1324         bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback);
1325         return 0;
1326 }
1327
1328 static int pcmcia_bus_suspend(struct pcmcia_socket *skt)
1329 {
1330         ds_dev_dbg(2, &skt->dev, "suspending socket %d\n", skt->sock);
1331         if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt,
1332                              pcmcia_bus_suspend_callback)) {
1333                 pcmcia_bus_resume(skt);
1334                 return -EIO;
1335         }
1336         return 0;
1337 }
1338
1339
1340 /*======================================================================
1341
1342     The card status event handler.
1343
1344 ======================================================================*/
1345
1346 /* Normally, the event is passed to individual drivers after
1347  * informing userspace. Only for CS_EVENT_CARD_REMOVAL this
1348  * is inversed to maintain historic compatibility.
1349  */
1350
1351 static int ds_event(struct pcmcia_socket *skt, event_t event, int priority)
1352 {
1353         struct pcmcia_socket *s = pcmcia_get_socket(skt);
1354
1355         if (!s) {
1356                 dev_printk(KERN_ERR, &skt->dev,
1357                            "PCMCIA obtaining reference to socket "      \
1358                            "failed, event 0x%x lost!\n", event);
1359                 return -ENODEV;
1360         }
1361
1362         ds_dev_dbg(1, &skt->dev, "ds_event(0x%06x, %d, 0x%p)\n",
1363                    event, priority, skt);
1364
1365         switch (event) {
1366         case CS_EVENT_CARD_REMOVAL:
1367                 s->pcmcia_state.present = 0;
1368                 pcmcia_card_remove(skt, NULL);
1369                 handle_event(skt, event);
1370                 break;
1371
1372         case CS_EVENT_CARD_INSERTION:
1373                 s->pcmcia_state.present = 1;
1374                 pcmcia_card_add(skt);
1375                 handle_event(skt, event);
1376                 break;
1377
1378         case CS_EVENT_EJECTION_REQUEST:
1379                 break;
1380
1381         case CS_EVENT_PM_SUSPEND:
1382         case CS_EVENT_PM_RESUME:
1383         case CS_EVENT_RESET_PHYSICAL:
1384         case CS_EVENT_CARD_RESET:
1385         default:
1386                 handle_event(skt, event);
1387                 break;
1388     }
1389
1390     pcmcia_put_socket(s);
1391
1392     return 0;
1393 } /* ds_event */
1394
1395
1396 struct pcmcia_device * pcmcia_dev_present(struct pcmcia_device *_p_dev)
1397 {
1398         struct pcmcia_device *p_dev;
1399         struct pcmcia_device *ret = NULL;
1400
1401         p_dev = pcmcia_get_dev(_p_dev);
1402         if (!p_dev)
1403                 return NULL;
1404
1405         if (!p_dev->socket->pcmcia_state.present)
1406                 goto out;
1407
1408         if (p_dev->_removed)
1409                 goto out;
1410
1411         if (p_dev->suspended)
1412                 goto out;
1413
1414         ret = p_dev;
1415  out:
1416         pcmcia_put_dev(p_dev);
1417         return ret;
1418 }
1419 EXPORT_SYMBOL(pcmcia_dev_present);
1420
1421
1422 static struct pcmcia_callback pcmcia_bus_callback = {
1423         .owner = THIS_MODULE,
1424         .event = ds_event,
1425         .requery = pcmcia_bus_rescan,
1426         .suspend = pcmcia_bus_suspend,
1427         .resume = pcmcia_bus_resume,
1428 };
1429
1430 static int __devinit pcmcia_bus_add_socket(struct device *dev,
1431                                            struct class_interface *class_intf)
1432 {
1433         struct pcmcia_socket *socket = dev_get_drvdata(dev);
1434         int ret;
1435
1436         socket = pcmcia_get_socket(socket);
1437         if (!socket) {
1438                 dev_printk(KERN_ERR, dev,
1439                            "PCMCIA obtaining reference to socket failed\n");
1440                 return -ENODEV;
1441         }
1442
1443         /*
1444          * Ugly. But we want to wait for the socket threads to have started up.
1445          * We really should let the drivers themselves drive some of this..
1446          */
1447         msleep(250);
1448
1449 #ifdef CONFIG_PCMCIA_IOCTL
1450         init_waitqueue_head(&socket->queue);
1451 #endif
1452         INIT_LIST_HEAD(&socket->devices_list);
1453         INIT_WORK(&socket->device_add, pcmcia_delayed_add_device);
1454         memset(&socket->pcmcia_state, 0, sizeof(u8));
1455         socket->device_count = 0;
1456
1457         ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback);
1458         if (ret) {
1459                 dev_printk(KERN_ERR, dev, "PCMCIA registration failed\n");
1460                 pcmcia_put_socket(socket);
1461                 return (ret);
1462         }
1463
1464         return 0;
1465 }
1466
1467 static void pcmcia_bus_remove_socket(struct device *dev,
1468                                      struct class_interface *class_intf)
1469 {
1470         struct pcmcia_socket *socket = dev_get_drvdata(dev);
1471
1472         if (!socket)
1473                 return;
1474
1475         socket->pcmcia_state.dead = 1;
1476         pccard_register_pcmcia(socket, NULL);
1477
1478         /* unregister any unbound devices */
1479         mutex_lock(&socket->skt_mutex);
1480         pcmcia_card_remove(socket, NULL);
1481         mutex_unlock(&socket->skt_mutex);
1482
1483         pcmcia_put_socket(socket);
1484
1485         return;
1486 }
1487
1488
1489 /* the pcmcia_bus_interface is used to handle pcmcia socket devices */
1490 static struct class_interface pcmcia_bus_interface __refdata = {
1491         .class = &pcmcia_socket_class,
1492         .add_dev = &pcmcia_bus_add_socket,
1493         .remove_dev = &pcmcia_bus_remove_socket,
1494 };
1495
1496
1497 struct bus_type pcmcia_bus_type = {
1498         .name = "pcmcia",
1499         .uevent = pcmcia_bus_uevent,
1500         .match = pcmcia_bus_match,
1501         .dev_attrs = pcmcia_dev_attrs,
1502         .probe = pcmcia_device_probe,
1503         .remove = pcmcia_device_remove,
1504         .suspend = pcmcia_dev_suspend,
1505         .resume = pcmcia_dev_resume,
1506 };
1507
1508
1509 static int __init init_pcmcia_bus(void)
1510 {
1511         int ret;
1512
1513         spin_lock_init(&pcmcia_dev_list_lock);
1514
1515         ret = bus_register(&pcmcia_bus_type);
1516         if (ret < 0) {
1517                 printk(KERN_WARNING "pcmcia: bus_register error: %d\n", ret);
1518                 return ret;
1519         }
1520         ret = class_interface_register(&pcmcia_bus_interface);
1521         if (ret < 0) {
1522                 printk(KERN_WARNING
1523                         "pcmcia: class_interface_register error: %d\n", ret);
1524                 bus_unregister(&pcmcia_bus_type);
1525                 return ret;
1526         }
1527
1528         pcmcia_setup_ioctl();
1529
1530         return 0;
1531 }
1532 fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that
1533                                * pcmcia_socket_class is already registered */
1534
1535
1536 static void __exit exit_pcmcia_bus(void)
1537 {
1538         pcmcia_cleanup_ioctl();
1539
1540         class_interface_unregister(&pcmcia_bus_interface);
1541
1542         bus_unregister(&pcmcia_bus_type);
1543 }
1544 module_exit(exit_pcmcia_bus);
1545
1546
1547 MODULE_ALIAS("ds");