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     int key;
  73     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
 141 static int pcmcia_report_error(struct pcmcia_device *p_dev, error_info_t *err)
 142 {
 143         int i;
 144         char *serv;
 145
 146         if (!p_dev)
 147                 printk(KERN_NOTICE);
 148         else
 149                 printk(KERN_NOTICE "%s: ", p_dev->dev.bus_id);
 150
 151         for (i = 0; i < ARRAY_SIZE(service_table); i++)
 152                 if (service_table[i].key == err->func)
 153                         break;
 154         if (i < ARRAY_SIZE(service_table))
 155                 serv = service_table[i].msg;
 156         else
 157                 serv = "Unknown service number";
 158
 159         for (i = 0; i < ARRAY_SIZE(error_table); i++)
 160                 if (error_table[i].key == err->retcode)
 161                         break;
 162         if (i < ARRAY_SIZE(error_table))
 163                 printk("%s: %s\n", serv, error_table[i].msg);
 164         else
 165                 printk("%s: Unknown error code %#x\n", serv, err->retcode);
 166
 167         return 0;
 168 } /* report_error */
 169
 170 /* end of code which was in cs.c before */
 171
 172 /*======================================================================*/
 173
 174 void cs_error(struct pcmcia_device *p_dev, int func, int ret)
 175 {
 176         error_info_t err = { func, ret };
 177         pcmcia_report_error(p_dev, &err);
 178 }
 179 EXPORT_SYMBOL(cs_error);
 180
 181
 182 static void pcmcia_check_driver(struct pcmcia_driver *p_drv)
 183 {
 184         struct pcmcia_device_id *did = p_drv->id_table;
 185         unsigned int i;
 186         u32 hash;
 187
 188         if (!p_drv->probe || !p_drv->remove)
 189                 printk(KERN_DEBUG "pcmcia: %s lacks a requisite callback "
 190                        "function\n", p_drv->drv.name);
 191
 192         while (did && did->match_flags) {
 193                 for (i=0; i<4; i++) {
 194                         if (!did->prod_id[i])
 195                                 continue;
 196
 197                         hash = crc32(0, did->prod_id[i], strlen(did->prod_id[i]));
 198                         if (hash == did->prod_id_hash[i])
 199                                 continue;
 200
 201                         printk(KERN_DEBUG "pcmcia: %s: invalid hash for "
 202                                "product string \"%s\": is 0x%x, should "
 203                                "be 0x%x\n", p_drv->drv.name, did->prod_id[i],
 204                                did->prod_id_hash[i], hash);
 205                         printk(KERN_DEBUG "pcmcia: see "
 206                                 "Documentation/pcmcia/devicetable.txt for "
 207                                 "details\n");
 208                 }
 209                 did++;
 210         }
 211
 212         return;
 213 }
 214
 215
 216 /*======================================================================*/
 217
 218
 219 struct pcmcia_dynid {
 220         struct list_head                node;
 221         struct pcmcia_device_id         id;
 222 };
 223
 224 /**
 225  * pcmcia_store_new_id - add a new PCMCIA device ID to this driver and re-probe devices
 226  * @driver: target device driver
 227  * @buf: buffer for scanning device ID data
 228  * @count: input size
 229  *
 230  * Adds a new dynamic PCMCIA device ID to this driver,
 231  * and causes the driver to probe for all devices again.
 232  */
 233 static ssize_t
 234 pcmcia_store_new_id(struct device_driver *driver, const char *buf, size_t count)
 235 {
 236         struct pcmcia_dynid *dynid;
 237         struct pcmcia_driver *pdrv = to_pcmcia_drv(driver);
 238         __u16 match_flags, manf_id, card_id;
 239         __u8 func_id, function, device_no;
 240         __u32 prod_id_hash[4] = {0, 0, 0, 0};
 241         int fields=0;
 242         int retval = 0;
 243
 244         fields = sscanf(buf, "%hx %hx %hx %hhx %hhx %hhx %x %x %x %x",
 245                         &match_flags, &manf_id, &card_id, &func_id, &function, &device_no,
 246                         &prod_id_hash[0], &prod_id_hash[1], &prod_id_hash[2], &prod_id_hash[3]);
 247         if (fields < 6)
 248                 return -EINVAL;
 249
 250         dynid = kzalloc(sizeof(struct pcmcia_dynid), GFP_KERNEL);
 251         if (!dynid)
 252                 return -ENOMEM;
 253
 254         INIT_LIST_HEAD(&dynid->node);
 255         dynid->id.match_flags = match_flags;
 256         dynid->id.manf_id = manf_id;
 257         dynid->id.card_id = card_id;
 258         dynid->id.func_id = func_id;
 259         dynid->id.function = function;
 260         dynid->id.device_no = device_no;
 261         memcpy(dynid->id.prod_id_hash, prod_id_hash, sizeof(__u32) * 4);
 262
 263         spin_lock(&pdrv->dynids.lock);
 264         list_add_tail(&pdrv->dynids.list, &dynid->node);
 265         spin_unlock(&pdrv->dynids.lock);
 266
 267         if (get_driver(&pdrv->drv)) {
 268                 retval = driver_attach(&pdrv->drv);
 269                 put_driver(&pdrv->drv);
 270         }
 271
 272         if (retval)
 273                 return retval;
 274         return count;
 275 }
 276 static DRIVER_ATTR(new_id, S_IWUSR, NULL, pcmcia_store_new_id);
 277
 278 static void
 279 pcmcia_free_dynids(struct pcmcia_driver *drv)
 280 {
 281         struct pcmcia_dynid *dynid, *n;
 282
 283         spin_lock(&drv->dynids.lock);
 284         list_for_each_entry_safe(dynid, n, &drv->dynids.list, node) {
 285                 list_del(&dynid->node);
 286                 kfree(dynid);
 287         }
 288         spin_unlock(&drv->dynids.lock);
 289 }
 290
 291 static int
 292 pcmcia_create_newid_file(struct pcmcia_driver *drv)
 293 {
 294         int error = 0;
 295         if (drv->probe != NULL)
 296                 error = driver_create_file(&drv->drv, &driver_attr_new_id);
 297         return error;
 298 }
 299
 300
 301 /**
 302  * pcmcia_register_driver - register a PCMCIA driver with the bus core
 303  * @driver: the &driver being registered
 304  *
 305  * Registers a PCMCIA driver with the PCMCIA bus core.
 306  */
 307 int pcmcia_register_driver(struct pcmcia_driver *driver)
 308 {
 309         int error;
 310
 311         if (!driver)
 312                 return -EINVAL;
 313
 314         pcmcia_check_driver(driver);
 315
 316         /* initialize common fields */
 317         driver->drv.bus = &pcmcia_bus_type;
 318         driver->drv.owner = driver->owner;
 319         spin_lock_init(&driver->dynids.lock);
 320         INIT_LIST_HEAD(&driver->dynids.list);
 321
 322         ds_dbg(3, "registering driver %s\n", driver->drv.name);
 323
 324         error = driver_register(&driver->drv);
 325         if (error < 0)
 326                 return error;
 327
 328         error = pcmcia_create_newid_file(driver);
 329         if (error)
 330                 driver_unregister(&driver->drv);
 331
 332         return error;
 333 }
 334 EXPORT_SYMBOL(pcmcia_register_driver);
 335
 336 /**
 337  * pcmcia_unregister_driver - unregister a PCMCIA driver with the bus core
 338  * @driver: the &driver being unregistered
 339  */
 340 void pcmcia_unregister_driver(struct pcmcia_driver *driver)
 341 {
 342         ds_dbg(3, "unregistering driver %s\n", driver->drv.name);
 343         driver_unregister(&driver->drv);
 344         pcmcia_free_dynids(driver);
 345 }
 346 EXPORT_SYMBOL(pcmcia_unregister_driver);
 347
 348
 349 /* pcmcia_device handling */
 350
 351 struct pcmcia_device * pcmcia_get_dev(struct pcmcia_device *p_dev)
 352 {
 353         struct device *tmp_dev;
 354         tmp_dev = get_device(&p_dev->dev);
 355         if (!tmp_dev)
 356                 return NULL;
 357         return to_pcmcia_dev(tmp_dev);
 358 }
 359
 360 void pcmcia_put_dev(struct pcmcia_device *p_dev)
 361 {
 362         if (p_dev)
 363                 put_device(&p_dev->dev);
 364 }
 365
 366 static void pcmcia_release_function(struct kref *ref)
 367 {
 368         struct config_t *c = container_of(ref, struct config_t, ref);
 369         ds_dbg(1, "releasing config_t\n");
 370         kfree(c);
 371 }
 372
 373 static void pcmcia_release_dev(struct device *dev)
 374 {
 375         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 376         ds_dev_dbg(1, dev, "releasing device\n");
 377         pcmcia_put_socket(p_dev->socket);
 378         kfree(p_dev->devname);
 379         kref_put(&p_dev->function_config->ref, pcmcia_release_function);
 380         kfree(p_dev);
 381 }
 382
 383 static void pcmcia_add_device_later(struct pcmcia_socket *s, int mfc)
 384 {
 385         if (!s->pcmcia_state.device_add_pending) {
 386                 ds_dev_dbg(1, &s->dev, "scheduling to add %s secondary"
 387                        " device to %d\n", mfc ? "mfc" : "pfc", s->sock);
 388                 s->pcmcia_state.device_add_pending = 1;
 389                 s->pcmcia_state.mfc_pfc = mfc;
 390                 schedule_work(&s->device_add);
 391         }
 392         return;
 393 }
 394
 395 static int pcmcia_device_probe(struct device * dev)
 396 {
 397         struct pcmcia_device *p_dev;
 398         struct pcmcia_driver *p_drv;
 399         struct pcmcia_device_id *did;
 400         struct pcmcia_socket *s;
 401         cistpl_config_t cis_config;
 402         int ret = 0;
 403
 404         dev = get_device(dev);
 405         if (!dev)
 406                 return -ENODEV;
 407
 408         p_dev = to_pcmcia_dev(dev);
 409         p_drv = to_pcmcia_drv(dev->driver);
 410         s = p_dev->socket;
 411
 412         ds_dev_dbg(1, dev, "trying to bind to %s\n", p_drv->drv.name);
 413
 414         if ((!p_drv->probe) || (!p_dev->function_config) ||
 415             (!try_module_get(p_drv->owner))) {
 416                 ret = -EINVAL;
 417                 goto put_dev;
 418         }
 419
 420         /* set up some more device information */
 421         ret = pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_CONFIG,
 422                                 &cis_config);
 423         if (!ret) {
 424                 p_dev->conf.ConfigBase = cis_config.base;
 425                 p_dev->conf.Present = cis_config.rmask[0];
 426         } else {
 427                 dev_printk(KERN_INFO, dev,
 428                            "pcmcia: could not parse base and rmask0 of CIS\n");
 429                 p_dev->conf.ConfigBase = 0;
 430                 p_dev->conf.Present = 0;
 431         }
 432
 433         ret = p_drv->probe(p_dev);
 434         if (ret) {
 435                 ds_dev_dbg(1, dev, "binding to %s failed with %d\n",
 436                            p_drv->drv.name, ret);
 437                 goto put_module;
 438         }
 439
 440         /* handle pseudo multifunction devices:
 441          * there are at most two pseudo multifunction devices.
 442          * if we're matching against the first, schedule a
 443          * call which will then check whether there are two
 444          * pseudo devices, and if not, add the second one.
 445          */
 446         did = p_dev->dev.driver_data;
 447         if (did && (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) &&
 448             (p_dev->socket->device_count == 1) && (p_dev->device_no == 0))
 449                 pcmcia_add_device_later(p_dev->socket, 0);
 450
 451  put_module:
 452         if (ret)
 453                 module_put(p_drv->owner);
 454  put_dev:
 455         if (ret)
 456                 put_device(dev);
 457         return (ret);
 458 }
 459
 460
 461 /*
 462  * Removes a PCMCIA card from the device tree and socket list.
 463  */
 464 static void pcmcia_card_remove(struct pcmcia_socket *s, struct pcmcia_device *leftover)
 465 {
 466         struct pcmcia_device    *p_dev;
 467         struct pcmcia_device    *tmp;
 468         unsigned long           flags;
 469
 470         ds_dev_dbg(2, leftover ? &leftover->dev : &s->dev,
 471                    "pcmcia_card_remove(%d) %s\n", s->sock,
 472                    leftover ? leftover->devname : "");
 473
 474         if (!leftover)
 475                 s->device_count = 0;
 476         else
 477                 s->device_count = 1;
 478
 479         /* unregister all pcmcia_devices registered with this socket, except leftover */
 480         list_for_each_entry_safe(p_dev, tmp, &s->devices_list, socket_device_list) {
 481                 if (p_dev == leftover)
 482                         continue;
 483
 484                 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 485                 list_del(&p_dev->socket_device_list);
 486                 p_dev->_removed=1;
 487                 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 488
 489                 ds_dev_dbg(2, &p_dev->dev, "unregistering device\n");
 490                 device_unregister(&p_dev->dev);
 491         }
 492
 493         return;
 494 }
 495
 496 static int pcmcia_device_remove(struct device * dev)
 497 {
 498         struct pcmcia_device *p_dev;
 499         struct pcmcia_driver *p_drv;
 500         struct pcmcia_device_id *did;
 501         int i;
 502
 503         p_dev = to_pcmcia_dev(dev);
 504         p_drv = to_pcmcia_drv(dev->driver);
 505
 506         ds_dev_dbg(1, dev, "removing device\n");
 507
 508         /* If we're removing the primary module driving a
 509          * pseudo multi-function card, we need to unbind
 510          * all devices
 511          */
 512         did = p_dev->dev.driver_data;
 513         if (did && (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) &&
 514             (p_dev->socket->device_count != 0) &&
 515             (p_dev->device_no == 0))
 516                 pcmcia_card_remove(p_dev->socket, p_dev);
 517
 518         /* detach the "instance" */
 519         if (!p_drv)
 520                 return 0;
 521
 522         if (p_drv->remove)
 523                 p_drv->remove(p_dev);
 524
 525         p_dev->dev_node = NULL;
 526
 527         /* check for proper unloading */
 528         if (p_dev->_irq || p_dev->_io || p_dev->_locked)
 529                 dev_printk(KERN_INFO, dev,
 530                         "pcmcia: driver %s did not release config properly\n",
 531                         p_drv->drv.name);
 532
 533         for (i = 0; i < MAX_WIN; i++)
 534                 if (p_dev->_win & CLIENT_WIN_REQ(i))
 535                         dev_printk(KERN_INFO, dev,
 536                           "pcmcia: driver %s did not release window properly\n",
 537                            p_drv->drv.name);
 538
 539         /* references from pcmcia_probe_device */
 540         pcmcia_put_dev(p_dev);
 541         module_put(p_drv->owner);
 542
 543         return 0;
 544 }
 545
 546
 547 /*
 548  * pcmcia_device_query -- determine information about a pcmcia device
 549  */
 550 static int pcmcia_device_query(struct pcmcia_device *p_dev)
 551 {
 552         cistpl_manfid_t manf_id;
 553         cistpl_funcid_t func_id;
 554         cistpl_vers_1_t *vers1;
 555         unsigned int i;
 556
 557         vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL);
 558         if (!vers1)
 559                 return -ENOMEM;
 560
 561         if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 562                                CISTPL_MANFID, &manf_id)) {
 563                 p_dev->manf_id = manf_id.manf;
 564                 p_dev->card_id = manf_id.card;
 565                 p_dev->has_manf_id = 1;
 566                 p_dev->has_card_id = 1;
 567         }
 568
 569         if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 570                                CISTPL_FUNCID, &func_id)) {
 571                 p_dev->func_id = func_id.func;
 572                 p_dev->has_func_id = 1;
 573         } else {
 574                 /* rule of thumb: cards with no FUNCID, but with
 575                  * common memory device geometry information, are
 576                  * probably memory cards (from pcmcia-cs) */
 577                 cistpl_device_geo_t *devgeo;
 578
 579                 devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL);
 580                 if (!devgeo) {
 581                         kfree(vers1);
 582                         return -ENOMEM;
 583                 }
 584                 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 585                                       CISTPL_DEVICE_GEO, devgeo)) {
 586                         ds_dev_dbg(0, &p_dev->dev,
 587                                    "mem device geometry probably means "
 588                                    "FUNCID_MEMORY\n");
 589                         p_dev->func_id = CISTPL_FUNCID_MEMORY;
 590                         p_dev->has_func_id = 1;
 591                 }
 592                 kfree(devgeo);
 593         }
 594
 595         if (!pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_VERS_1,
 596                                vers1)) {
 597                 for (i=0; i < vers1->ns; i++) {
 598                         char *tmp;
 599                         unsigned int length;
 600
 601                         tmp = vers1->str + vers1->ofs[i];
 602
 603                         length = strlen(tmp) + 1;
 604                         if ((length < 2) || (length > 255))
 605                                 continue;
 606
 607                         p_dev->prod_id[i] = kmalloc(sizeof(char) * length,
 608                                                     GFP_KERNEL);
 609                         if (!p_dev->prod_id[i])
 610                                 continue;
 611
 612                         p_dev->prod_id[i] = strncpy(p_dev->prod_id[i],
 613                                                     tmp, length);
 614                 }
 615         }
 616
 617         kfree(vers1);
 618         return 0;
 619 }
 620
 621
 622 /* device_add_lock is needed to avoid double registration by cardmgr and kernel.
 623  * Serializes pcmcia_device_add; will most likely be removed in future.
 624  *
 625  * While it has the caveat that adding new PCMCIA devices inside(!) device_register()
 626  * won't work, this doesn't matter much at the moment: the driver core doesn't
 627  * support it either.
 628  */
 629 static DEFINE_MUTEX(device_add_lock);
 630
 631 struct pcmcia_device * pcmcia_device_add(struct pcmcia_socket *s, unsigned int function)
 632 {
 633         struct pcmcia_device *p_dev, *tmp_dev;
 634         unsigned long flags;
 635         int bus_id_len;
 636
 637         s = pcmcia_get_socket(s);
 638         if (!s)
 639                 return NULL;
 640
 641         mutex_lock(&device_add_lock);
 642
 643         ds_dbg(3, "adding device to %d, function %d\n", s->sock, function);
 644
 645         /* max of 4 devices per card */
 646         if (s->device_count == 4)
 647                 goto err_put;
 648
 649         p_dev = kzalloc(sizeof(struct pcmcia_device), GFP_KERNEL);
 650         if (!p_dev)
 651                 goto err_put;
 652
 653         p_dev->socket = s;
 654         p_dev->device_no = (s->device_count++);
 655         p_dev->func   = function;
 656
 657         p_dev->dev.bus = &pcmcia_bus_type;
 658         p_dev->dev.parent = s->dev.parent;
 659         p_dev->dev.release = pcmcia_release_dev;
 660         /* by default don't allow DMA */
 661         p_dev->dma_mask = DMA_MASK_NONE;
 662         p_dev->dev.dma_mask = &p_dev->dma_mask;
 663         bus_id_len = sprintf (p_dev->dev.bus_id, "%d.%d", p_dev->socket->sock, p_dev->device_no);
 664
 665         p_dev->devname = kmalloc(6 + bus_id_len + 1, GFP_KERNEL);
 666         if (!p_dev->devname)
 667                 goto err_free;
 668         sprintf (p_dev->devname, "pcmcia%s", p_dev->dev.bus_id);
 669         ds_dev_dbg(3, &p_dev->dev, "devname is %s\n", p_dev->devname);
 670
 671         spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 672
 673         /*
 674          * p_dev->function_config must be the same for all card functions.
 675          * Note that this is serialized by the device_add_lock, so that
 676          * only one such struct will be created.
 677          */
 678         list_for_each_entry(tmp_dev, &s->devices_list, socket_device_list)
 679                 if (p_dev->func == tmp_dev->func) {
 680                         p_dev->function_config = tmp_dev->function_config;
 681                         kref_get(&p_dev->function_config->ref);
 682                 }
 683
 684         /* Add to the list in pcmcia_bus_socket */
 685         list_add(&p_dev->socket_device_list, &s->devices_list);
 686
 687         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 688
 689         if (!p_dev->function_config) {
 690                 ds_dev_dbg(3, &p_dev->dev, "creating config_t\n");
 691                 p_dev->function_config = kzalloc(sizeof(struct config_t),
 692                                                  GFP_KERNEL);
 693                 if (!p_dev->function_config)
 694                         goto err_unreg;
 695                 kref_init(&p_dev->function_config->ref);
 696         }
 697
 698         dev_printk(KERN_NOTICE, &p_dev->dev,
 699                    "pcmcia: registering new device %s\n",
 700                    p_dev->devname);
 701
 702         pcmcia_device_query(p_dev);
 703
 704         if (device_register(&p_dev->dev))
 705                 goto err_unreg;
 706
 707         mutex_unlock(&device_add_lock);
 708
 709         return p_dev;
 710
 711  err_unreg:
 712         spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 713         list_del(&p_dev->socket_device_list);
 714         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 715
 716  err_free:
 717         kfree(p_dev->devname);
 718         kfree(p_dev);
 719         s->device_count--;
 720  err_put:
 721         mutex_unlock(&device_add_lock);
 722         pcmcia_put_socket(s);
 723
 724         return NULL;
 725 }
 726
 727
 728 static int pcmcia_card_add(struct pcmcia_socket *s)
 729 {
 730         cistpl_longlink_mfc_t mfc;
 731         unsigned int no_funcs, i, no_chains;
 732         int ret = 0;
 733
 734         if (!(s->resource_setup_done)) {
 735                 ds_dev_dbg(3, &s->dev,
 736                            "no resources available, delaying card_add\n");
 737                 return -EAGAIN; /* try again, but later... */
 738         }
 739
 740         if (pcmcia_validate_mem(s)) {
 741                 ds_dev_dbg(3, &s->dev, "validating mem resources failed, "
 742                        "delaying card_add\n");
 743                 return -EAGAIN; /* try again, but later... */
 744         }
 745
 746         ret = pccard_validate_cis(s, BIND_FN_ALL, &no_chains);
 747         if (ret || !no_chains) {
 748                 ds_dev_dbg(0, &s->dev, "invalid CIS or invalid resources\n");
 749                 return -ENODEV;
 750         }
 751
 752         if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
 753                 no_funcs = mfc.nfn;
 754         else
 755                 no_funcs = 1;
 756         s->functions = no_funcs;
 757
 758         for (i=0; i < no_funcs; i++)
 759                 pcmcia_device_add(s, i);
 760
 761         return (ret);
 762 }
 763
 764
 765 static void pcmcia_delayed_add_device(struct work_struct *work)
 766 {
 767         struct pcmcia_socket *s =
 768                 container_of(work, struct pcmcia_socket, device_add);
 769         ds_dev_dbg(1, &s->dev, "adding additional device to %d\n", s->sock);
 770         pcmcia_device_add(s, s->pcmcia_state.mfc_pfc);
 771         s->pcmcia_state.device_add_pending = 0;
 772         s->pcmcia_state.mfc_pfc = 0;
 773 }
 774
 775 static int pcmcia_requery(struct device *dev, void * _data)
 776 {
 777         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 778         if (!p_dev->dev.driver) {
 779                 ds_dev_dbg(1, dev, "update device information\n");
 780                 pcmcia_device_query(p_dev);
 781         }
 782
 783         return 0;
 784 }
 785
 786 static void pcmcia_bus_rescan(struct pcmcia_socket *skt, int new_cis)
 787 {
 788         int no_devices = 0;
 789         int ret = 0;
 790         unsigned long flags;
 791
 792         /* must be called with skt_mutex held */
 793         ds_dev_dbg(0, &skt->dev, "re-scanning socket %d\n", skt->sock);
 794
 795         spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 796         if (list_empty(&skt->devices_list))
 797                 no_devices = 1;
 798         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 799
 800         /* If this is because of a CIS override, start over */
 801         if (new_cis && !no_devices)
 802                 pcmcia_card_remove(skt, NULL);
 803
 804         /* if no devices were added for this socket yet because of
 805          * missing resource information or other trouble, we need to
 806          * do this now. */
 807         if (no_devices || new_cis) {
 808                 ret = pcmcia_card_add(skt);
 809                 if (ret)
 810                         return;
 811         }
 812
 813         /* some device information might have changed because of a CIS
 814          * update or because we can finally read it correctly... so
 815          * determine it again, overwriting old values if necessary. */
 816         bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery);
 817
 818         /* we re-scan all devices, not just the ones connected to this
 819          * socket. This does not matter, though. */
 820         ret = bus_rescan_devices(&pcmcia_bus_type);
 821         if (ret)
 822                 printk(KERN_INFO "pcmcia: bus_rescan_devices failed\n");
 823 }
 824
 825 #ifdef CONFIG_PCMCIA_LOAD_CIS
 826
 827 /**
 828  * pcmcia_load_firmware - load CIS from userspace if device-provided is broken
 829  * @dev: the pcmcia device which needs a CIS override
 830  * @filename: requested filename in /lib/firmware/
 831  *
 832  * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if
 833  * the one provided by the card is broken. The firmware files reside in
 834  * /lib/firmware/ in userspace.
 835  */
 836 static int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
 837 {
 838         struct pcmcia_socket *s = dev->socket;
 839         const struct firmware *fw;
 840         char path[FIRMWARE_NAME_MAX];
 841         int ret = -ENOMEM;
 842         int no_funcs;
 843         int old_funcs;
 844         cistpl_longlink_mfc_t mfc;
 845
 846         if (!filename)
 847                 return -EINVAL;
 848
 849         ds_dev_dbg(1, &dev->dev, "trying to load CIS file %s\n", filename);
 850
 851         if (strlen(filename) > (FIRMWARE_NAME_MAX - 1)) {
 852                 dev_printk(KERN_WARNING, &dev->dev,
 853                            "pcmcia: CIS filename is too long [%s]\n",
 854                            filename);
 855                 return -EINVAL;
 856         }
 857
 858         snprintf(path, sizeof(path), "%s", filename);
 859
 860         if (request_firmware(&fw, path, &dev->dev) == 0) {
 861                 if (fw->size >= CISTPL_MAX_CIS_SIZE) {
 862                         ret = -EINVAL;
 863                         dev_printk(KERN_ERR, &dev->dev,
 864                                    "pcmcia: CIS override is too big\n");
 865                         goto release;
 866                 }
 867
 868                 if (!pcmcia_replace_cis(s, fw->data, fw->size))
 869                         ret = 0;
 870                 else {
 871                         dev_printk(KERN_ERR, &dev->dev,
 872                                    "pcmcia: CIS override failed\n");
 873                         goto release;
 874                 }
 875
 876
 877                 /* update information */
 878                 pcmcia_device_query(dev);
 879
 880                 /* does this cis override add or remove functions? */
 881                 old_funcs = s->functions;
 882
 883                 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
 884                         no_funcs = mfc.nfn;
 885                 else
 886                         no_funcs = 1;
 887                 s->functions = no_funcs;
 888
 889                 if (old_funcs > no_funcs)
 890                         pcmcia_card_remove(s, dev);
 891                 else if (no_funcs > old_funcs)
 892                         pcmcia_add_device_later(s, 1);
 893         }
 894  release:
 895         release_firmware(fw);
 896
 897         return (ret);
 898 }
 899
 900 #else /* !CONFIG_PCMCIA_LOAD_CIS */
 901
 902 static inline int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
 903 {
 904         return -ENODEV;
 905 }
 906
 907 #endif
 908
 909
 910 static inline int pcmcia_devmatch(struct pcmcia_device *dev,
 911                                   struct pcmcia_device_id *did)
 912 {
 913         if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
 914                 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
 915                         return 0;
 916         }
 917
 918         if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
 919                 if ((!dev->has_card_id) || (dev->card_id != did->card_id))
 920                         return 0;
 921         }
 922
 923         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
 924                 if (dev->func != did->function)
 925                         return 0;
 926         }
 927
 928         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
 929                 if (!dev->prod_id[0])
 930                         return 0;
 931                 if (strcmp(did->prod_id[0], dev->prod_id[0]))
 932                         return 0;
 933         }
 934
 935         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
 936                 if (!dev->prod_id[1])
 937                         return 0;
 938                 if (strcmp(did->prod_id[1], dev->prod_id[1]))
 939                         return 0;
 940         }
 941
 942         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
 943                 if (!dev->prod_id[2])
 944                         return 0;
 945                 if (strcmp(did->prod_id[2], dev->prod_id[2]))
 946                         return 0;
 947         }
 948
 949         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
 950                 if (!dev->prod_id[3])
 951                         return 0;
 952                 if (strcmp(did->prod_id[3], dev->prod_id[3]))
 953                         return 0;
 954         }
 955
 956         if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
 957                 if (dev->device_no != did->device_no)
 958                         return 0;
 959         }
 960
 961         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
 962                 if ((!dev->has_func_id) || (dev->func_id != did->func_id))
 963                         return 0;
 964
 965                 /* if this is a pseudo-multi-function device,
 966                  * we need explicit matches */
 967                 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO)
 968                         return 0;
 969                 if (dev->device_no)
 970                         return 0;
 971
 972                 /* also, FUNC_ID matching needs to be activated by userspace
 973                  * after it has re-checked that there is no possible module
 974                  * with a prod_id/manf_id/card_id match.
 975                  */
 976                 ds_dev_dbg(0, &dev->dev,
 977                         "skipping FUNC_ID match until userspace interaction\n");
 978                 if (!dev->allow_func_id_match)
 979                         return 0;
 980         }
 981
 982         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
 983                 ds_dev_dbg(0, &dev->dev, "device needs a fake CIS\n");
 984                 if (!dev->socket->fake_cis)
 985                         pcmcia_load_firmware(dev, did->cisfile);
 986
 987                 if (!dev->socket->fake_cis)
 988                         return 0;
 989         }
 990
 991         if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
 992                 int i;
 993                 for (i=0; i<4; i++)
 994                         if (dev->prod_id[i])
 995                                 return 0;
 996                 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
 997                         return 0;
 998         }
 999
1000         dev->dev.driver_data = (void *) did;
1001
1002         return 1;
1003 }
1004
1005
1006 static int pcmcia_bus_match(struct device * dev, struct device_driver * drv) {
1007         struct pcmcia_device * p_dev = to_pcmcia_dev(dev);
1008         struct pcmcia_driver * p_drv = to_pcmcia_drv(drv);
1009         struct pcmcia_device_id *did = p_drv->id_table;
1010         struct pcmcia_dynid *dynid;
1011
1012         /* match dynamic devices first */
1013         spin_lock(&p_drv->dynids.lock);
1014         list_for_each_entry(dynid, &p_drv->dynids.list, node) {
1015                 ds_dev_dbg(3, dev, "trying to match to %s\n", drv->name);
1016                 if (pcmcia_devmatch(p_dev, &dynid->id)) {
1017                         ds_dev_dbg(0, dev, "matched to %s\n", drv->name);
1018                         spin_unlock(&p_drv->dynids.lock);
1019                         return 1;
1020                 }
1021         }
1022         spin_unlock(&p_drv->dynids.lock);
1023
1024 #ifdef CONFIG_PCMCIA_IOCTL
1025         /* matching by cardmgr */
1026         if (p_dev->cardmgr == p_drv) {
1027                 ds_dev_dbg(0, dev, "cardmgr matched to %s\n", drv->name);
1028                 return 1;
1029         }
1030 #endif
1031
1032         while (did && did->match_flags) {
1033                 ds_dev_dbg(3, dev, "trying to match to %s\n", drv->name);
1034                 if (pcmcia_devmatch(p_dev, did)) {
1035                         ds_dev_dbg(0, dev, "matched to %s\n", drv->name);
1036                         return 1;
1037                 }
1038                 did++;
1039         }
1040
1041         return 0;
1042 }
1043
1044 #ifdef CONFIG_HOTPLUG
1045
1046 static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
1047 {
1048         struct pcmcia_device *p_dev;
1049         int i;
1050         u32 hash[4] = { 0, 0, 0, 0};
1051
1052         if (!dev)
1053                 return -ENODEV;
1054
1055         p_dev = to_pcmcia_dev(dev);
1056
1057         /* calculate hashes */
1058         for (i=0; i<4; i++) {
1059                 if (!p_dev->prod_id[i])
1060                         continue;
1061                 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
1062         }
1063
1064         if (add_uevent_var(env, "SOCKET_NO=%u", p_dev->socket->sock))
1065                 return -ENOMEM;
1066
1067         if (add_uevent_var(env, "DEVICE_NO=%02X", p_dev->device_no))
1068                 return -ENOMEM;
1069
1070         if (add_uevent_var(env, "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
1071                            "pa%08Xpb%08Xpc%08Xpd%08X",
1072                            p_dev->has_manf_id ? p_dev->manf_id : 0,
1073                            p_dev->has_card_id ? p_dev->card_id : 0,
1074                            p_dev->has_func_id ? p_dev->func_id : 0,
1075                            p_dev->func,
1076                            p_dev->device_no,
1077                            hash[0],
1078                            hash[1],
1079                            hash[2],
1080                            hash[3]))
1081                 return -ENOMEM;
1082
1083         return 0;
1084 }
1085
1086 #else
1087
1088 static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
1089 {
1090         return -ENODEV;
1091 }
1092
1093 #endif
1094
1095 /************************ runtime PM support ***************************/
1096
1097 static int pcmcia_dev_suspend(struct device *dev, pm_message_t state);
1098 static int pcmcia_dev_resume(struct device *dev);
1099
1100 static int runtime_suspend(struct device *dev)
1101 {
1102         int rc;
1103
1104         down(&dev->sem);
1105         rc = pcmcia_dev_suspend(dev, PMSG_SUSPEND);
1106         up(&dev->sem);
1107         return rc;
1108 }
1109
1110 static void runtime_resume(struct device *dev)
1111 {
1112         int rc;
1113
1114         down(&dev->sem);
1115         rc = pcmcia_dev_resume(dev);
1116         up(&dev->sem);
1117 }
1118
1119 /************************ per-device sysfs output ***************************/
1120
1121 #define pcmcia_device_attr(field, test, format)                         \
1122 static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf)              \
1123 {                                                                       \
1124         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);               \
1125         return p_dev->test ? sprintf (buf, format, p_dev->field) : -ENODEV; \
1126 }
1127
1128 #define pcmcia_device_stringattr(name, field)                                   \
1129 static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf)               \
1130 {                                                                       \
1131         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);               \
1132         return p_dev->field ? sprintf (buf, "%s\n", p_dev->field) : -ENODEV; \
1133 }
1134
1135 pcmcia_device_attr(func, socket, "0x%02x\n");
1136 pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
1137 pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
1138 pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
1139 pcmcia_device_stringattr(prod_id1, prod_id[0]);
1140 pcmcia_device_stringattr(prod_id2, prod_id[1]);
1141 pcmcia_device_stringattr(prod_id3, prod_id[2]);
1142 pcmcia_device_stringattr(prod_id4, prod_id[3]);
1143
1144
1145 static ssize_t pcmcia_show_pm_state(struct device *dev, struct device_attribute *attr, char *buf)
1146 {
1147         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1148
1149         if (p_dev->suspended)
1150                 return sprintf(buf, "off\n");
1151         else
1152                 return sprintf(buf, "on\n");
1153 }
1154
1155 static ssize_t pcmcia_store_pm_state(struct device *dev, struct device_attribute *attr,
1156                                      const char *buf, size_t count)
1157 {
1158         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1159         int ret = 0;
1160
1161         if (!count)
1162                 return -EINVAL;
1163
1164         if ((!p_dev->suspended) && !strncmp(buf, "off", 3))
1165                 ret = runtime_suspend(dev);
1166         else if (p_dev->suspended && !strncmp(buf, "on", 2))
1167                 runtime_resume(dev);
1168
1169         return ret ? ret : count;
1170 }
1171
1172
1173 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1174 {
1175         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1176         int i;
1177         u32 hash[4] = { 0, 0, 0, 0};
1178
1179         /* calculate hashes */
1180         for (i=0; i<4; i++) {
1181                 if (!p_dev->prod_id[i])
1182                         continue;
1183                 hash[i] = crc32(0,p_dev->prod_id[i],strlen(p_dev->prod_id[i]));
1184         }
1185         return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
1186                                 "pa%08Xpb%08Xpc%08Xpd%08X\n",
1187                                 p_dev->has_manf_id ? p_dev->manf_id : 0,
1188                                 p_dev->has_card_id ? p_dev->card_id : 0,
1189                                 p_dev->has_func_id ? p_dev->func_id : 0,
1190                                 p_dev->func, p_dev->device_no,
1191                                 hash[0], hash[1], hash[2], hash[3]);
1192 }
1193
1194 static ssize_t pcmcia_store_allow_func_id_match(struct device *dev,
1195                 struct device_attribute *attr, const char *buf, size_t count)
1196 {
1197         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1198         int ret;
1199
1200         if (!count)
1201                 return -EINVAL;
1202
1203         mutex_lock(&p_dev->socket->skt_mutex);
1204         p_dev->allow_func_id_match = 1;
1205         mutex_unlock(&p_dev->socket->skt_mutex);
1206
1207         ret = bus_rescan_devices(&pcmcia_bus_type);
1208         if (ret)
1209                 printk(KERN_INFO "pcmcia: bus_rescan_devices failed after "
1210                        "allowing func_id matches\n");
1211
1212         return count;
1213 }
1214
1215 static struct device_attribute pcmcia_dev_attrs[] = {
1216         __ATTR(function, 0444, func_show, NULL),
1217         __ATTR(pm_state, 0644, pcmcia_show_pm_state, pcmcia_store_pm_state),
1218         __ATTR_RO(func_id),
1219         __ATTR_RO(manf_id),
1220         __ATTR_RO(card_id),
1221         __ATTR_RO(prod_id1),
1222         __ATTR_RO(prod_id2),
1223         __ATTR_RO(prod_id3),
1224         __ATTR_RO(prod_id4),
1225         __ATTR_RO(modalias),
1226         __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match),
1227         __ATTR_NULL,
1228 };
1229
1230 /* PM support, also needed for reset */
1231
1232 static int pcmcia_dev_suspend(struct device * dev, pm_message_t state)
1233 {
1234         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1235         struct pcmcia_driver *p_drv = NULL;
1236         int ret = 0;
1237
1238         if (p_dev->suspended)
1239                 return 0;
1240
1241         ds_dev_dbg(2, dev, "suspending\n");
1242
1243         if (dev->driver)
1244                 p_drv = to_pcmcia_drv(dev->driver);
1245
1246         if (!p_drv)
1247                 goto out;
1248
1249         if (p_drv->suspend) {
1250                 ret = p_drv->suspend(p_dev);
1251                 if (ret) {
1252                         dev_printk(KERN_ERR, dev,
1253                                    "pcmcia: device %s (driver %s) did "
1254                                    "not want to go to sleep (%d)\n",
1255                                    p_dev->devname, p_drv->drv.name, ret);
1256                         goto out;
1257                 }
1258         }
1259
1260         if (p_dev->device_no == p_dev->func) {
1261                 ds_dev_dbg(2, dev, "releasing configuration\n");
1262                 pcmcia_release_configuration(p_dev);
1263         }
1264
1265  out:
1266         if (!ret)
1267                 p_dev->suspended = 1;
1268         return ret;
1269 }
1270
1271
1272 static int pcmcia_dev_resume(struct device * dev)
1273 {
1274         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1275         struct pcmcia_driver *p_drv = NULL;
1276         int ret = 0;
1277
1278         if (!p_dev->suspended)
1279                 return 0;
1280
1281         ds_dev_dbg(2, dev, "resuming\n");
1282
1283         if (dev->driver)
1284                 p_drv = to_pcmcia_drv(dev->driver);
1285
1286         if (!p_drv)
1287                 goto out;
1288
1289         if (p_dev->device_no == p_dev->func) {
1290                 ds_dev_dbg(2, dev, "requesting configuration\n");
1291                 ret = pcmcia_request_configuration(p_dev, &p_dev->conf);
1292                 if (ret)
1293                         goto out;
1294         }
1295
1296         if (p_drv->resume)
1297                 ret = p_drv->resume(p_dev);
1298
1299  out:
1300         if (!ret)
1301                 p_dev->suspended = 0;
1302         return ret;
1303 }
1304
1305
1306 static int pcmcia_bus_suspend_callback(struct device *dev, void * _data)
1307 {
1308         struct pcmcia_socket *skt = _data;
1309         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1310
1311         if (p_dev->socket != skt || p_dev->suspended)
1312                 return 0;
1313
1314         return runtime_suspend(dev);
1315 }
1316
1317 static int pcmcia_bus_resume_callback(struct device *dev, void * _data)
1318 {
1319         struct pcmcia_socket *skt = _data;
1320         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1321
1322         if (p_dev->socket != skt || !p_dev->suspended)
1323                 return 0;
1324
1325         runtime_resume(dev);
1326
1327         return 0;
1328 }
1329
1330 static int pcmcia_bus_resume(struct pcmcia_socket *skt)
1331 {
1332         ds_dev_dbg(2, &skt->dev, "resuming socket %d\n", skt->sock);
1333         bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback);
1334         return 0;
1335 }
1336
1337 static int pcmcia_bus_suspend(struct pcmcia_socket *skt)
1338 {
1339         ds_dev_dbg(2, &skt->dev, "suspending socket %d\n", skt->sock);
1340         if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt,
1341                              pcmcia_bus_suspend_callback)) {
1342                 pcmcia_bus_resume(skt);
1343                 return -EIO;
1344         }
1345         return 0;
1346 }
1347
1348
1349 /*======================================================================
1350
1351     The card status event handler.
1352
1353 ======================================================================*/
1354
1355 /* Normally, the event is passed to individual drivers after
1356  * informing userspace. Only for CS_EVENT_CARD_REMOVAL this
1357  * is inversed to maintain historic compatibility.
1358  */
1359
1360 static int ds_event(struct pcmcia_socket *skt, event_t event, int priority)
1361 {
1362         struct pcmcia_socket *s = pcmcia_get_socket(skt);
1363
1364         if (!s) {
1365                 dev_printk(KERN_ERR, &skt->dev,
1366                            "PCMCIA obtaining reference to socket "      \
1367                            "failed, event 0x%x lost!\n", event);
1368                 return -ENODEV;
1369         }
1370
1371         ds_dev_dbg(1, &skt->dev, "ds_event(0x%06x, %d, 0x%p)\n",
1372                    event, priority, skt);
1373
1374         switch (event) {
1375         case CS_EVENT_CARD_REMOVAL:
1376                 s->pcmcia_state.present = 0;
1377                 pcmcia_card_remove(skt, NULL);
1378                 handle_event(skt, event);
1379                 break;
1380
1381         case CS_EVENT_CARD_INSERTION:
1382                 s->pcmcia_state.present = 1;
1383                 pcmcia_card_add(skt);
1384                 handle_event(skt, event);
1385                 break;
1386
1387         case CS_EVENT_EJECTION_REQUEST:
1388                 break;
1389
1390         case CS_EVENT_PM_SUSPEND:
1391         case CS_EVENT_PM_RESUME:
1392         case CS_EVENT_RESET_PHYSICAL:
1393         case CS_EVENT_CARD_RESET:
1394         default:
1395                 handle_event(skt, event);
1396                 break;
1397     }
1398
1399     pcmcia_put_socket(s);
1400
1401     return 0;
1402 } /* ds_event */
1403
1404
1405 struct pcmcia_device * pcmcia_dev_present(struct pcmcia_device *_p_dev)
1406 {
1407         struct pcmcia_device *p_dev;
1408         struct pcmcia_device *ret = NULL;
1409
1410         p_dev = pcmcia_get_dev(_p_dev);
1411         if (!p_dev)
1412                 return NULL;
1413
1414         if (!p_dev->socket->pcmcia_state.present)
1415                 goto out;
1416
1417         if (p_dev->_removed)
1418                 goto out;
1419
1420         if (p_dev->suspended)
1421                 goto out;
1422
1423         ret = p_dev;
1424  out:
1425         pcmcia_put_dev(p_dev);
1426         return ret;
1427 }
1428 EXPORT_SYMBOL(pcmcia_dev_present);
1429
1430
1431 static struct pcmcia_callback pcmcia_bus_callback = {
1432         .owner = THIS_MODULE,
1433         .event = ds_event,
1434         .requery = pcmcia_bus_rescan,
1435         .suspend = pcmcia_bus_suspend,
1436         .resume = pcmcia_bus_resume,
1437 };
1438
1439 static int __devinit pcmcia_bus_add_socket(struct device *dev,
1440                                            struct class_interface *class_intf)
1441 {
1442         struct pcmcia_socket *socket = dev_get_drvdata(dev);
1443         int ret;
1444
1445         socket = pcmcia_get_socket(socket);
1446         if (!socket) {
1447                 dev_printk(KERN_ERR, dev,
1448                            "PCMCIA obtaining reference to socket failed\n");
1449                 return -ENODEV;
1450         }
1451
1452         /*
1453          * Ugly. But we want to wait for the socket threads to have started up.
1454          * We really should let the drivers themselves drive some of this..
1455          */
1456         msleep(250);
1457
1458 #ifdef CONFIG_PCMCIA_IOCTL
1459         init_waitqueue_head(&socket->queue);
1460 #endif
1461         INIT_LIST_HEAD(&socket->devices_list);
1462         INIT_WORK(&socket->device_add, pcmcia_delayed_add_device);
1463         memset(&socket->pcmcia_state, 0, sizeof(u8));
1464         socket->device_count = 0;
1465
1466         ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback);
1467         if (ret) {
1468                 dev_printk(KERN_ERR, dev, "PCMCIA registration failed\n");
1469                 pcmcia_put_socket(socket);
1470                 return (ret);
1471         }
1472
1473         return 0;
1474 }
1475
1476 static void pcmcia_bus_remove_socket(struct device *dev,
1477                                      struct class_interface *class_intf)
1478 {
1479         struct pcmcia_socket *socket = dev_get_drvdata(dev);
1480
1481         if (!socket)
1482                 return;
1483
1484         socket->pcmcia_state.dead = 1;
1485         pccard_register_pcmcia(socket, NULL);
1486
1487         /* unregister any unbound devices */
1488         mutex_lock(&socket->skt_mutex);
1489         pcmcia_card_remove(socket, NULL);
1490         mutex_unlock(&socket->skt_mutex);
1491
1492         pcmcia_put_socket(socket);
1493
1494         return;
1495 }
1496
1497
1498 /* the pcmcia_bus_interface is used to handle pcmcia socket devices */
1499 static struct class_interface pcmcia_bus_interface __refdata = {
1500         .class = &pcmcia_socket_class,
1501         .add_dev = &pcmcia_bus_add_socket,
1502         .remove_dev = &pcmcia_bus_remove_socket,
1503 };
1504
1505
1506 struct bus_type pcmcia_bus_type = {
1507         .name = "pcmcia",
1508         .uevent = pcmcia_bus_uevent,
1509         .match = pcmcia_bus_match,
1510         .dev_attrs = pcmcia_dev_attrs,
1511         .probe = pcmcia_device_probe,
1512         .remove = pcmcia_device_remove,
1513         .suspend = pcmcia_dev_suspend,
1514         .resume = pcmcia_dev_resume,
1515 };
1516
1517
1518 static int __init init_pcmcia_bus(void)
1519 {
1520         int ret;
1521
1522         spin_lock_init(&pcmcia_dev_list_lock);
1523
1524         ret = bus_register(&pcmcia_bus_type);
1525         if (ret < 0) {
1526                 printk(KERN_WARNING "pcmcia: bus_register error: %d\n", ret);
1527                 return ret;
1528         }
1529         ret = class_interface_register(&pcmcia_bus_interface);
1530         if (ret < 0) {
1531                 printk(KERN_WARNING
1532                         "pcmcia: class_interface_register error: %d\n", ret);
1533                 bus_unregister(&pcmcia_bus_type);
1534                 return ret;
1535         }
1536
1537         pcmcia_setup_ioctl();
1538
1539         return 0;
1540 }
1541 fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that
1542                                * pcmcia_socket_class is already registered */
1543
1544
1545 static void __exit exit_pcmcia_bus(void)
1546 {
1547         pcmcia_cleanup_ioctl();
1548
1549         class_interface_unregister(&pcmcia_bus_interface);
1550
1551         bus_unregister(&pcmcia_bus_type);
1552 }
1553 module_exit(exit_pcmcia_bus);
1554
1555
1556 MODULE_ALIAS("ds");