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     { CS_SUCCESS,               "Operation succeeded" },
  78     { CS_BAD_ATTRIBUTE,         "Bad attribute", },
  79     { CS_BAD_BASE,              "Bad base address" },
  80     { CS_BAD_IRQ,               "Bad IRQ" },
  81     { CS_BAD_OFFSET,            "Bad offset" },
  82     { CS_BAD_PAGE,              "Bad page number" },
  83     { CS_BAD_SIZE,              "Bad size" },
  84     { CS_BAD_TYPE,              "Bad type" },
  85     { -EIO,                     "Input/Output error" },
  86     { -ENODEV,                  "No card present" },
  87     { -EINVAL,                  "Bad parameter" },
  88     { CS_BAD_ARGS,              "Bad arguments" },
  89     { CS_CONFIGURATION_LOCKED,  "Configuration locked" },
  90     { CS_IN_USE,                "Resource in use" },
  91     { CS_NO_MORE_ITEMS,         "No more items" },
  92     { CS_OUT_OF_RESOURCE,       "Out of resource" },
  93     { CS_BAD_TUPLE,             "Bad CIS tuple" }
  94 };
  95
  96
  97 static const lookup_t service_table[] = {
  98     { AccessConfigurationRegister,      "AccessConfigurationRegister" },
  99     { AddSocketServices,                "AddSocketServices" },
 100     { AdjustResourceInfo,               "AdjustResourceInfo" },
 101     { CheckEraseQueue,                  "CheckEraseQueue" },
 102     { CloseMemory,                      "CloseMemory" },
 103     { DeregisterClient,                 "DeregisterClient" },
 104     { DeregisterEraseQueue,             "DeregisterEraseQueue" },
 105     { GetCardServicesInfo,              "GetCardServicesInfo" },
 106     { GetClientInfo,                    "GetClientInfo" },
 107     { GetConfigurationInfo,             "GetConfigurationInfo" },
 108     { GetEventMask,                     "GetEventMask" },
 109     { GetFirstClient,                   "GetFirstClient" },
 110     { GetFirstRegion,                   "GetFirstRegion" },
 111     { GetFirstTuple,                    "GetFirstTuple" },
 112     { GetNextClient,                    "GetNextClient" },
 113     { GetNextRegion,                    "GetNextRegion" },
 114     { GetNextTuple,                     "GetNextTuple" },
 115     { GetStatus,                        "GetStatus" },
 116     { GetTupleData,                     "GetTupleData" },
 117     { MapMemPage,                       "MapMemPage" },
 118     { ModifyConfiguration,              "ModifyConfiguration" },
 119     { ModifyWindow,                     "ModifyWindow" },
 120     { OpenMemory,                       "OpenMemory" },
 121     { ParseTuple,                       "ParseTuple" },
 122     { ReadMemory,                       "ReadMemory" },
 123     { RegisterClient,                   "RegisterClient" },
 124     { RegisterEraseQueue,               "RegisterEraseQueue" },
 125     { RegisterMTD,                      "RegisterMTD" },
 126     { ReleaseConfiguration,             "ReleaseConfiguration" },
 127     { ReleaseIO,                        "ReleaseIO" },
 128     { ReleaseIRQ,                       "ReleaseIRQ" },
 129     { ReleaseWindow,                    "ReleaseWindow" },
 130     { RequestConfiguration,             "RequestConfiguration" },
 131     { RequestIO,                        "RequestIO" },
 132     { RequestIRQ,                       "RequestIRQ" },
 133     { RequestSocketMask,                "RequestSocketMask" },
 134     { RequestWindow,                    "RequestWindow" },
 135     { ResetCard,                        "ResetCard" },
 136     { SetEventMask,                     "SetEventMask" },
 137     { ValidateCIS,                      "ValidateCIS" },
 138     { WriteMemory,                      "WriteMemory" },
 139     { BindDevice,                       "BindDevice" },
 140     { BindMTD,                          "BindMTD" },
 141     { ReportError,                      "ReportError" },
 142     { SuspendCard,                      "SuspendCard" },
 143     { ResumeCard,                       "ResumeCard" },
 144     { EjectCard,                        "EjectCard" },
 145     { InsertCard,                       "InsertCard" },
 146     { ReplaceCIS,                       "ReplaceCIS" }
 147 };
 148
 149
 150 static int pcmcia_report_error(struct pcmcia_device *p_dev, error_info_t *err)
 151 {
 152         int i;
 153         char *serv;
 154
 155         if (!p_dev)
 156                 printk(KERN_NOTICE);
 157         else
 158                 printk(KERN_NOTICE "%s: ", p_dev->dev.bus_id);
 159
 160         for (i = 0; i < ARRAY_SIZE(service_table); i++)
 161                 if (service_table[i].key == err->func)
 162                         break;
 163         if (i < ARRAY_SIZE(service_table))
 164                 serv = service_table[i].msg;
 165         else
 166                 serv = "Unknown service number";
 167
 168         for (i = 0; i < ARRAY_SIZE(error_table); i++)
 169                 if (error_table[i].key == err->retcode)
 170                         break;
 171         if (i < ARRAY_SIZE(error_table))
 172                 printk("%s: %s\n", serv, error_table[i].msg);
 173         else
 174                 printk("%s: Unknown error code %#x\n", serv, err->retcode);
 175
 176         return 0;
 177 } /* report_error */
 178
 179 /* end of code which was in cs.c before */
 180
 181 /*======================================================================*/
 182
 183 void cs_error(struct pcmcia_device *p_dev, int func, int ret)
 184 {
 185         error_info_t err = { func, ret };
 186         pcmcia_report_error(p_dev, &err);
 187 }
 188 EXPORT_SYMBOL(cs_error);
 189
 190
 191 static void pcmcia_check_driver(struct pcmcia_driver *p_drv)
 192 {
 193         struct pcmcia_device_id *did = p_drv->id_table;
 194         unsigned int i;
 195         u32 hash;
 196
 197         if (!p_drv->probe || !p_drv->remove)
 198                 printk(KERN_DEBUG "pcmcia: %s lacks a requisite callback "
 199                        "function\n", p_drv->drv.name);
 200
 201         while (did && did->match_flags) {
 202                 for (i=0; i<4; i++) {
 203                         if (!did->prod_id[i])
 204                                 continue;
 205
 206                         hash = crc32(0, did->prod_id[i], strlen(did->prod_id[i]));
 207                         if (hash == did->prod_id_hash[i])
 208                                 continue;
 209
 210                         printk(KERN_DEBUG "pcmcia: %s: invalid hash for "
 211                                "product string \"%s\": is 0x%x, should "
 212                                "be 0x%x\n", p_drv->drv.name, did->prod_id[i],
 213                                did->prod_id_hash[i], hash);
 214                         printk(KERN_DEBUG "pcmcia: see "
 215                                 "Documentation/pcmcia/devicetable.txt for "
 216                                 "details\n");
 217                 }
 218                 did++;
 219         }
 220
 221         return;
 222 }
 223
 224
 225 /*======================================================================*/
 226
 227
 228 struct pcmcia_dynid {
 229         struct list_head                node;
 230         struct pcmcia_device_id         id;
 231 };
 232
 233 /**
 234  * pcmcia_store_new_id - add a new PCMCIA device ID to this driver and re-probe devices
 235  * @driver: target device driver
 236  * @buf: buffer for scanning device ID data
 237  * @count: input size
 238  *
 239  * Adds a new dynamic PCMCIA device ID to this driver,
 240  * and causes the driver to probe for all devices again.
 241  */
 242 static ssize_t
 243 pcmcia_store_new_id(struct device_driver *driver, const char *buf, size_t count)
 244 {
 245         struct pcmcia_dynid *dynid;
 246         struct pcmcia_driver *pdrv = to_pcmcia_drv(driver);
 247         __u16 match_flags, manf_id, card_id;
 248         __u8 func_id, function, device_no;
 249         __u32 prod_id_hash[4] = {0, 0, 0, 0};
 250         int fields=0;
 251         int retval = 0;
 252
 253         fields = sscanf(buf, "%hx %hx %hx %hhx %hhx %hhx %x %x %x %x",
 254                         &match_flags, &manf_id, &card_id, &func_id, &function, &device_no,
 255                         &prod_id_hash[0], &prod_id_hash[1], &prod_id_hash[2], &prod_id_hash[3]);
 256         if (fields < 6)
 257                 return -EINVAL;
 258
 259         dynid = kzalloc(sizeof(struct pcmcia_dynid), GFP_KERNEL);
 260         if (!dynid)
 261                 return -ENOMEM;
 262
 263         INIT_LIST_HEAD(&dynid->node);
 264         dynid->id.match_flags = match_flags;
 265         dynid->id.manf_id = manf_id;
 266         dynid->id.card_id = card_id;
 267         dynid->id.func_id = func_id;
 268         dynid->id.function = function;
 269         dynid->id.device_no = device_no;
 270         memcpy(dynid->id.prod_id_hash, prod_id_hash, sizeof(__u32) * 4);
 271
 272         spin_lock(&pdrv->dynids.lock);
 273         list_add_tail(&pdrv->dynids.list, &dynid->node);
 274         spin_unlock(&pdrv->dynids.lock);
 275
 276         if (get_driver(&pdrv->drv)) {
 277                 retval = driver_attach(&pdrv->drv);
 278                 put_driver(&pdrv->drv);
 279         }
 280
 281         if (retval)
 282                 return retval;
 283         return count;
 284 }
 285 static DRIVER_ATTR(new_id, S_IWUSR, NULL, pcmcia_store_new_id);
 286
 287 static void
 288 pcmcia_free_dynids(struct pcmcia_driver *drv)
 289 {
 290         struct pcmcia_dynid *dynid, *n;
 291
 292         spin_lock(&drv->dynids.lock);
 293         list_for_each_entry_safe(dynid, n, &drv->dynids.list, node) {
 294                 list_del(&dynid->node);
 295                 kfree(dynid);
 296         }
 297         spin_unlock(&drv->dynids.lock);
 298 }
 299
 300 static int
 301 pcmcia_create_newid_file(struct pcmcia_driver *drv)
 302 {
 303         int error = 0;
 304         if (drv->probe != NULL)
 305                 error = driver_create_file(&drv->drv, &driver_attr_new_id);
 306         return error;
 307 }
 308
 309
 310 /**
 311  * pcmcia_register_driver - register a PCMCIA driver with the bus core
 312  * @driver: the &driver being registered
 313  *
 314  * Registers a PCMCIA driver with the PCMCIA bus core.
 315  */
 316 int pcmcia_register_driver(struct pcmcia_driver *driver)
 317 {
 318         int error;
 319
 320         if (!driver)
 321                 return -EINVAL;
 322
 323         pcmcia_check_driver(driver);
 324
 325         /* initialize common fields */
 326         driver->drv.bus = &pcmcia_bus_type;
 327         driver->drv.owner = driver->owner;
 328         spin_lock_init(&driver->dynids.lock);
 329         INIT_LIST_HEAD(&driver->dynids.list);
 330
 331         ds_dbg(3, "registering driver %s\n", driver->drv.name);
 332
 333         error = driver_register(&driver->drv);
 334         if (error < 0)
 335                 return error;
 336
 337         error = pcmcia_create_newid_file(driver);
 338         if (error)
 339                 driver_unregister(&driver->drv);
 340
 341         return error;
 342 }
 343 EXPORT_SYMBOL(pcmcia_register_driver);
 344
 345 /**
 346  * pcmcia_unregister_driver - unregister a PCMCIA driver with the bus core
 347  * @driver: the &driver being unregistered
 348  */
 349 void pcmcia_unregister_driver(struct pcmcia_driver *driver)
 350 {
 351         ds_dbg(3, "unregistering driver %s\n", driver->drv.name);
 352         driver_unregister(&driver->drv);
 353         pcmcia_free_dynids(driver);
 354 }
 355 EXPORT_SYMBOL(pcmcia_unregister_driver);
 356
 357
 358 /* pcmcia_device handling */
 359
 360 struct pcmcia_device * pcmcia_get_dev(struct pcmcia_device *p_dev)
 361 {
 362         struct device *tmp_dev;
 363         tmp_dev = get_device(&p_dev->dev);
 364         if (!tmp_dev)
 365                 return NULL;
 366         return to_pcmcia_dev(tmp_dev);
 367 }
 368
 369 void pcmcia_put_dev(struct pcmcia_device *p_dev)
 370 {
 371         if (p_dev)
 372                 put_device(&p_dev->dev);
 373 }
 374
 375 static void pcmcia_release_function(struct kref *ref)
 376 {
 377         struct config_t *c = container_of(ref, struct config_t, ref);
 378         ds_dbg(1, "releasing config_t\n");
 379         kfree(c);
 380 }
 381
 382 static void pcmcia_release_dev(struct device *dev)
 383 {
 384         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 385         ds_dev_dbg(1, dev, "releasing device\n");
 386         pcmcia_put_socket(p_dev->socket);
 387         kfree(p_dev->devname);
 388         kref_put(&p_dev->function_config->ref, pcmcia_release_function);
 389         kfree(p_dev);
 390 }
 391
 392 static void pcmcia_add_device_later(struct pcmcia_socket *s, int mfc)
 393 {
 394         if (!s->pcmcia_state.device_add_pending) {
 395                 ds_dev_dbg(1, &s->dev, "scheduling to add %s secondary"
 396                        " device to %d\n", mfc ? "mfc" : "pfc", s->sock);
 397                 s->pcmcia_state.device_add_pending = 1;
 398                 s->pcmcia_state.mfc_pfc = mfc;
 399                 schedule_work(&s->device_add);
 400         }
 401         return;
 402 }
 403
 404 static int pcmcia_device_probe(struct device * dev)
 405 {
 406         struct pcmcia_device *p_dev;
 407         struct pcmcia_driver *p_drv;
 408         struct pcmcia_device_id *did;
 409         struct pcmcia_socket *s;
 410         cistpl_config_t cis_config;
 411         int ret = 0;
 412
 413         dev = get_device(dev);
 414         if (!dev)
 415                 return -ENODEV;
 416
 417         p_dev = to_pcmcia_dev(dev);
 418         p_drv = to_pcmcia_drv(dev->driver);
 419         s = p_dev->socket;
 420
 421         ds_dev_dbg(1, dev, "trying to bind to %s\n", p_drv->drv.name);
 422
 423         if ((!p_drv->probe) || (!p_dev->function_config) ||
 424             (!try_module_get(p_drv->owner))) {
 425                 ret = -EINVAL;
 426                 goto put_dev;
 427         }
 428
 429         /* set up some more device information */
 430         ret = pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_CONFIG,
 431                                 &cis_config);
 432         if (!ret) {
 433                 p_dev->conf.ConfigBase = cis_config.base;
 434                 p_dev->conf.Present = cis_config.rmask[0];
 435         } else {
 436                 dev_printk(KERN_INFO, dev,
 437                            "pcmcia: could not parse base and rmask0 of CIS\n");
 438                 p_dev->conf.ConfigBase = 0;
 439                 p_dev->conf.Present = 0;
 440         }
 441
 442         ret = p_drv->probe(p_dev);
 443         if (ret) {
 444                 ds_dev_dbg(1, dev, "binding to %s failed with %d\n",
 445                            p_drv->drv.name, ret);
 446                 goto put_module;
 447         }
 448
 449         /* handle pseudo multifunction devices:
 450          * there are at most two pseudo multifunction devices.
 451          * if we're matching against the first, schedule a
 452          * call which will then check whether there are two
 453          * pseudo devices, and if not, add the second one.
 454          */
 455         did = p_dev->dev.driver_data;
 456         if (did && (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) &&
 457             (p_dev->socket->device_count == 1) && (p_dev->device_no == 0))
 458                 pcmcia_add_device_later(p_dev->socket, 0);
 459
 460  put_module:
 461         if (ret)
 462                 module_put(p_drv->owner);
 463  put_dev:
 464         if (ret)
 465                 put_device(dev);
 466         return (ret);
 467 }
 468
 469
 470 /*
 471  * Removes a PCMCIA card from the device tree and socket list.
 472  */
 473 static void pcmcia_card_remove(struct pcmcia_socket *s, struct pcmcia_device *leftover)
 474 {
 475         struct pcmcia_device    *p_dev;
 476         struct pcmcia_device    *tmp;
 477         unsigned long           flags;
 478
 479         ds_dev_dbg(2, leftover ? &leftover->dev : &s->dev,
 480                    "pcmcia_card_remove(%d) %s\n", s->sock,
 481                    leftover ? leftover->devname : "");
 482
 483         if (!leftover)
 484                 s->device_count = 0;
 485         else
 486                 s->device_count = 1;
 487
 488         /* unregister all pcmcia_devices registered with this socket, except leftover */
 489         list_for_each_entry_safe(p_dev, tmp, &s->devices_list, socket_device_list) {
 490                 if (p_dev == leftover)
 491                         continue;
 492
 493                 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 494                 list_del(&p_dev->socket_device_list);
 495                 p_dev->_removed=1;
 496                 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 497
 498                 ds_dev_dbg(2, &p_dev->dev, "unregistering device\n");
 499                 device_unregister(&p_dev->dev);
 500         }
 501
 502         return;
 503 }
 504
 505 static int pcmcia_device_remove(struct device * dev)
 506 {
 507         struct pcmcia_device *p_dev;
 508         struct pcmcia_driver *p_drv;
 509         struct pcmcia_device_id *did;
 510         int i;
 511
 512         p_dev = to_pcmcia_dev(dev);
 513         p_drv = to_pcmcia_drv(dev->driver);
 514
 515         ds_dev_dbg(1, dev, "removing device\n");
 516
 517         /* If we're removing the primary module driving a
 518          * pseudo multi-function card, we need to unbind
 519          * all devices
 520          */
 521         did = p_dev->dev.driver_data;
 522         if (did && (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) &&
 523             (p_dev->socket->device_count != 0) &&
 524             (p_dev->device_no == 0))
 525                 pcmcia_card_remove(p_dev->socket, p_dev);
 526
 527         /* detach the "instance" */
 528         if (!p_drv)
 529                 return 0;
 530
 531         if (p_drv->remove)
 532                 p_drv->remove(p_dev);
 533
 534         p_dev->dev_node = NULL;
 535
 536         /* check for proper unloading */
 537         if (p_dev->_irq || p_dev->_io || p_dev->_locked)
 538                 dev_printk(KERN_INFO, dev,
 539                         "pcmcia: driver %s did not release config properly\n",
 540                         p_drv->drv.name);
 541
 542         for (i = 0; i < MAX_WIN; i++)
 543                 if (p_dev->_win & CLIENT_WIN_REQ(i))
 544                         dev_printk(KERN_INFO, dev,
 545                           "pcmcia: driver %s did not release window properly\n",
 546                            p_drv->drv.name);
 547
 548         /* references from pcmcia_probe_device */
 549         pcmcia_put_dev(p_dev);
 550         module_put(p_drv->owner);
 551
 552         return 0;
 553 }
 554
 555
 556 /*
 557  * pcmcia_device_query -- determine information about a pcmcia device
 558  */
 559 static int pcmcia_device_query(struct pcmcia_device *p_dev)
 560 {
 561         cistpl_manfid_t manf_id;
 562         cistpl_funcid_t func_id;
 563         cistpl_vers_1_t *vers1;
 564         unsigned int i;
 565
 566         vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL);
 567         if (!vers1)
 568                 return -ENOMEM;
 569
 570         if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 571                                CISTPL_MANFID, &manf_id)) {
 572                 p_dev->manf_id = manf_id.manf;
 573                 p_dev->card_id = manf_id.card;
 574                 p_dev->has_manf_id = 1;
 575                 p_dev->has_card_id = 1;
 576         }
 577
 578         if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 579                                CISTPL_FUNCID, &func_id)) {
 580                 p_dev->func_id = func_id.func;
 581                 p_dev->has_func_id = 1;
 582         } else {
 583                 /* rule of thumb: cards with no FUNCID, but with
 584                  * common memory device geometry information, are
 585                  * probably memory cards (from pcmcia-cs) */
 586                 cistpl_device_geo_t *devgeo;
 587
 588                 devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL);
 589                 if (!devgeo) {
 590                         kfree(vers1);
 591                         return -ENOMEM;
 592                 }
 593                 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 594                                       CISTPL_DEVICE_GEO, devgeo)) {
 595                         ds_dev_dbg(0, &p_dev->dev,
 596                                    "mem device geometry probably means "
 597                                    "FUNCID_MEMORY\n");
 598                         p_dev->func_id = CISTPL_FUNCID_MEMORY;
 599                         p_dev->has_func_id = 1;
 600                 }
 601                 kfree(devgeo);
 602         }
 603
 604         if (!pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_VERS_1,
 605                                vers1)) {
 606                 for (i=0; i < vers1->ns; i++) {
 607                         char *tmp;
 608                         unsigned int length;
 609
 610                         tmp = vers1->str + vers1->ofs[i];
 611
 612                         length = strlen(tmp) + 1;
 613                         if ((length < 2) || (length > 255))
 614                                 continue;
 615
 616                         p_dev->prod_id[i] = kmalloc(sizeof(char) * length,
 617                                                     GFP_KERNEL);
 618                         if (!p_dev->prod_id[i])
 619                                 continue;
 620
 621                         p_dev->prod_id[i] = strncpy(p_dev->prod_id[i],
 622                                                     tmp, length);
 623                 }
 624         }
 625
 626         kfree(vers1);
 627         return 0;
 628 }
 629
 630
 631 /* device_add_lock is needed to avoid double registration by cardmgr and kernel.
 632  * Serializes pcmcia_device_add; will most likely be removed in future.
 633  *
 634  * While it has the caveat that adding new PCMCIA devices inside(!) device_register()
 635  * won't work, this doesn't matter much at the moment: the driver core doesn't
 636  * support it either.
 637  */
 638 static DEFINE_MUTEX(device_add_lock);
 639
 640 struct pcmcia_device * pcmcia_device_add(struct pcmcia_socket *s, unsigned int function)
 641 {
 642         struct pcmcia_device *p_dev, *tmp_dev;
 643         unsigned long flags;
 644         int bus_id_len;
 645
 646         s = pcmcia_get_socket(s);
 647         if (!s)
 648                 return NULL;
 649
 650         mutex_lock(&device_add_lock);
 651
 652         ds_dbg(3, "adding device to %d, function %d\n", s->sock, function);
 653
 654         /* max of 4 devices per card */
 655         if (s->device_count == 4)
 656                 goto err_put;
 657
 658         p_dev = kzalloc(sizeof(struct pcmcia_device), GFP_KERNEL);
 659         if (!p_dev)
 660                 goto err_put;
 661
 662         p_dev->socket = s;
 663         p_dev->device_no = (s->device_count++);
 664         p_dev->func   = function;
 665
 666         p_dev->dev.bus = &pcmcia_bus_type;
 667         p_dev->dev.parent = s->dev.parent;
 668         p_dev->dev.release = pcmcia_release_dev;
 669         /* by default don't allow DMA */
 670         p_dev->dma_mask = DMA_MASK_NONE;
 671         p_dev->dev.dma_mask = &p_dev->dma_mask;
 672         bus_id_len = sprintf (p_dev->dev.bus_id, "%d.%d", p_dev->socket->sock, p_dev->device_no);
 673
 674         p_dev->devname = kmalloc(6 + bus_id_len + 1, GFP_KERNEL);
 675         if (!p_dev->devname)
 676                 goto err_free;
 677         sprintf (p_dev->devname, "pcmcia%s", p_dev->dev.bus_id);
 678         ds_dev_dbg(3, &p_dev->dev, "devname is %s\n", p_dev->devname);
 679
 680         spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 681
 682         /*
 683          * p_dev->function_config must be the same for all card functions.
 684          * Note that this is serialized by the device_add_lock, so that
 685          * only one such struct will be created.
 686          */
 687         list_for_each_entry(tmp_dev, &s->devices_list, socket_device_list)
 688                 if (p_dev->func == tmp_dev->func) {
 689                         p_dev->function_config = tmp_dev->function_config;
 690                         kref_get(&p_dev->function_config->ref);
 691                 }
 692
 693         /* Add to the list in pcmcia_bus_socket */
 694         list_add(&p_dev->socket_device_list, &s->devices_list);
 695
 696         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 697
 698         if (!p_dev->function_config) {
 699                 ds_dev_dbg(3, &p_dev->dev, "creating config_t\n");
 700                 p_dev->function_config = kzalloc(sizeof(struct config_t),
 701                                                  GFP_KERNEL);
 702                 if (!p_dev->function_config)
 703                         goto err_unreg;
 704                 kref_init(&p_dev->function_config->ref);
 705         }
 706
 707         dev_printk(KERN_NOTICE, &p_dev->dev,
 708                    "pcmcia: registering new device %s\n",
 709                    p_dev->devname);
 710
 711         pcmcia_device_query(p_dev);
 712
 713         if (device_register(&p_dev->dev))
 714                 goto err_unreg;
 715
 716         mutex_unlock(&device_add_lock);
 717
 718         return p_dev;
 719
 720  err_unreg:
 721         spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 722         list_del(&p_dev->socket_device_list);
 723         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 724
 725  err_free:
 726         kfree(p_dev->devname);
 727         kfree(p_dev);
 728         s->device_count--;
 729  err_put:
 730         mutex_unlock(&device_add_lock);
 731         pcmcia_put_socket(s);
 732
 733         return NULL;
 734 }
 735
 736
 737 static int pcmcia_card_add(struct pcmcia_socket *s)
 738 {
 739         cistpl_longlink_mfc_t mfc;
 740         unsigned int no_funcs, i, no_chains;
 741         int ret = 0;
 742
 743         if (!(s->resource_setup_done)) {
 744                 ds_dev_dbg(3, &s->dev,
 745                            "no resources available, delaying card_add\n");
 746                 return -EAGAIN; /* try again, but later... */
 747         }
 748
 749         if (pcmcia_validate_mem(s)) {
 750                 ds_dev_dbg(3, &s->dev, "validating mem resources failed, "
 751                        "delaying card_add\n");
 752                 return -EAGAIN; /* try again, but later... */
 753         }
 754
 755         ret = pccard_validate_cis(s, BIND_FN_ALL, &no_chains);
 756         if (ret || !no_chains) {
 757                 ds_dev_dbg(0, &s->dev, "invalid CIS or invalid resources\n");
 758                 return -ENODEV;
 759         }
 760
 761         if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
 762                 no_funcs = mfc.nfn;
 763         else
 764                 no_funcs = 1;
 765         s->functions = no_funcs;
 766
 767         for (i=0; i < no_funcs; i++)
 768                 pcmcia_device_add(s, i);
 769
 770         return (ret);
 771 }
 772
 773
 774 static void pcmcia_delayed_add_device(struct work_struct *work)
 775 {
 776         struct pcmcia_socket *s =
 777                 container_of(work, struct pcmcia_socket, device_add);
 778         ds_dev_dbg(1, &s->dev, "adding additional device to %d\n", s->sock);
 779         pcmcia_device_add(s, s->pcmcia_state.mfc_pfc);
 780         s->pcmcia_state.device_add_pending = 0;
 781         s->pcmcia_state.mfc_pfc = 0;
 782 }
 783
 784 static int pcmcia_requery(struct device *dev, void * _data)
 785 {
 786         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 787         if (!p_dev->dev.driver) {
 788                 ds_dev_dbg(1, dev, "update device information\n");
 789                 pcmcia_device_query(p_dev);
 790         }
 791
 792         return 0;
 793 }
 794
 795 static void pcmcia_bus_rescan(struct pcmcia_socket *skt, int new_cis)
 796 {
 797         int no_devices = 0;
 798         int ret = 0;
 799         unsigned long flags;
 800
 801         /* must be called with skt_mutex held */
 802         ds_dev_dbg(0, &skt->dev, "re-scanning socket %d\n", skt->sock);
 803
 804         spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 805         if (list_empty(&skt->devices_list))
 806                 no_devices = 1;
 807         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 808
 809         /* If this is because of a CIS override, start over */
 810         if (new_cis && !no_devices)
 811                 pcmcia_card_remove(skt, NULL);
 812
 813         /* if no devices were added for this socket yet because of
 814          * missing resource information or other trouble, we need to
 815          * do this now. */
 816         if (no_devices || new_cis) {
 817                 ret = pcmcia_card_add(skt);
 818                 if (ret)
 819                         return;
 820         }
 821
 822         /* some device information might have changed because of a CIS
 823          * update or because we can finally read it correctly... so
 824          * determine it again, overwriting old values if necessary. */
 825         bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery);
 826
 827         /* we re-scan all devices, not just the ones connected to this
 828          * socket. This does not matter, though. */
 829         ret = bus_rescan_devices(&pcmcia_bus_type);
 830         if (ret)
 831                 printk(KERN_INFO "pcmcia: bus_rescan_devices failed\n");
 832 }
 833
 834 #ifdef CONFIG_PCMCIA_LOAD_CIS
 835
 836 /**
 837  * pcmcia_load_firmware - load CIS from userspace if device-provided is broken
 838  * @dev: the pcmcia device which needs a CIS override
 839  * @filename: requested filename in /lib/firmware/
 840  *
 841  * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if
 842  * the one provided by the card is broken. The firmware files reside in
 843  * /lib/firmware/ in userspace.
 844  */
 845 static int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
 846 {
 847         struct pcmcia_socket *s = dev->socket;
 848         const struct firmware *fw;
 849         char path[FIRMWARE_NAME_MAX];
 850         int ret = -ENOMEM;
 851         int no_funcs;
 852         int old_funcs;
 853         cistpl_longlink_mfc_t mfc;
 854
 855         if (!filename)
 856                 return -EINVAL;
 857
 858         ds_dev_dbg(1, &dev->dev, "trying to load CIS file %s\n", filename);
 859
 860         if (strlen(filename) > (FIRMWARE_NAME_MAX - 1)) {
 861                 dev_printk(KERN_WARNING, &dev->dev,
 862                            "pcmcia: CIS filename is too long [%s]\n",
 863                            filename);
 864                 return -EINVAL;
 865         }
 866
 867         snprintf(path, sizeof(path), "%s", filename);
 868
 869         if (request_firmware(&fw, path, &dev->dev) == 0) {
 870                 if (fw->size >= CISTPL_MAX_CIS_SIZE) {
 871                         ret = -EINVAL;
 872                         dev_printk(KERN_ERR, &dev->dev,
 873                                    "pcmcia: CIS override is too big\n");
 874                         goto release;
 875                 }
 876
 877                 if (!pcmcia_replace_cis(s, fw->data, fw->size))
 878                         ret = 0;
 879                 else {
 880                         dev_printk(KERN_ERR, &dev->dev,
 881                                    "pcmcia: CIS override failed\n");
 882                         goto release;
 883                 }
 884
 885
 886                 /* update information */
 887                 pcmcia_device_query(dev);
 888
 889                 /* does this cis override add or remove functions? */
 890                 old_funcs = s->functions;
 891
 892                 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
 893                         no_funcs = mfc.nfn;
 894                 else
 895                         no_funcs = 1;
 896                 s->functions = no_funcs;
 897
 898                 if (old_funcs > no_funcs)
 899                         pcmcia_card_remove(s, dev);
 900                 else if (no_funcs > old_funcs)
 901                         pcmcia_add_device_later(s, 1);
 902         }
 903  release:
 904         release_firmware(fw);
 905
 906         return (ret);
 907 }
 908
 909 #else /* !CONFIG_PCMCIA_LOAD_CIS */
 910
 911 static inline int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
 912 {
 913         return -ENODEV;
 914 }
 915
 916 #endif
 917
 918
 919 static inline int pcmcia_devmatch(struct pcmcia_device *dev,
 920                                   struct pcmcia_device_id *did)
 921 {
 922         if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
 923                 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
 924                         return 0;
 925         }
 926
 927         if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
 928                 if ((!dev->has_card_id) || (dev->card_id != did->card_id))
 929                         return 0;
 930         }
 931
 932         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
 933                 if (dev->func != did->function)
 934                         return 0;
 935         }
 936
 937         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
 938                 if (!dev->prod_id[0])
 939                         return 0;
 940                 if (strcmp(did->prod_id[0], dev->prod_id[0]))
 941                         return 0;
 942         }
 943
 944         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
 945                 if (!dev->prod_id[1])
 946                         return 0;
 947                 if (strcmp(did->prod_id[1], dev->prod_id[1]))
 948                         return 0;
 949         }
 950
 951         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
 952                 if (!dev->prod_id[2])
 953                         return 0;
 954                 if (strcmp(did->prod_id[2], dev->prod_id[2]))
 955                         return 0;
 956         }
 957
 958         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
 959                 if (!dev->prod_id[3])
 960                         return 0;
 961                 if (strcmp(did->prod_id[3], dev->prod_id[3]))
 962                         return 0;
 963         }
 964
 965         if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
 966                 if (dev->device_no != did->device_no)
 967                         return 0;
 968         }
 969
 970         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
 971                 if ((!dev->has_func_id) || (dev->func_id != did->func_id))
 972                         return 0;
 973
 974                 /* if this is a pseudo-multi-function device,
 975                  * we need explicit matches */
 976                 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO)
 977                         return 0;
 978                 if (dev->device_no)
 979                         return 0;
 980
 981                 /* also, FUNC_ID matching needs to be activated by userspace
 982                  * after it has re-checked that there is no possible module
 983                  * with a prod_id/manf_id/card_id match.
 984                  */
 985                 ds_dev_dbg(0, &dev->dev,
 986                         "skipping FUNC_ID match until userspace interaction\n");
 987                 if (!dev->allow_func_id_match)
 988                         return 0;
 989         }
 990
 991         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
 992                 ds_dev_dbg(0, &dev->dev, "device needs a fake CIS\n");
 993                 if (!dev->socket->fake_cis)
 994                         pcmcia_load_firmware(dev, did->cisfile);
 995
 996                 if (!dev->socket->fake_cis)
 997                         return 0;
 998         }
 999
1000         if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
1001                 int i;
1002                 for (i=0; i<4; i++)
1003                         if (dev->prod_id[i])
1004                                 return 0;
1005                 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
1006                         return 0;
1007         }
1008
1009         dev->dev.driver_data = (void *) did;
1010
1011         return 1;
1012 }
1013
1014
1015 static int pcmcia_bus_match(struct device * dev, struct device_driver * drv) {
1016         struct pcmcia_device * p_dev = to_pcmcia_dev(dev);
1017         struct pcmcia_driver * p_drv = to_pcmcia_drv(drv);
1018         struct pcmcia_device_id *did = p_drv->id_table;
1019         struct pcmcia_dynid *dynid;
1020
1021         /* match dynamic devices first */
1022         spin_lock(&p_drv->dynids.lock);
1023         list_for_each_entry(dynid, &p_drv->dynids.list, node) {
1024                 ds_dev_dbg(3, dev, "trying to match to %s\n", drv->name);
1025                 if (pcmcia_devmatch(p_dev, &dynid->id)) {
1026                         ds_dev_dbg(0, dev, "matched to %s\n", drv->name);
1027                         spin_unlock(&p_drv->dynids.lock);
1028                         return 1;
1029                 }
1030         }
1031         spin_unlock(&p_drv->dynids.lock);
1032
1033 #ifdef CONFIG_PCMCIA_IOCTL
1034         /* matching by cardmgr */
1035         if (p_dev->cardmgr == p_drv) {
1036                 ds_dev_dbg(0, dev, "cardmgr matched to %s\n", drv->name);
1037                 return 1;
1038         }
1039 #endif
1040
1041         while (did && did->match_flags) {
1042                 ds_dev_dbg(3, dev, "trying to match to %s\n", drv->name);
1043                 if (pcmcia_devmatch(p_dev, did)) {
1044                         ds_dev_dbg(0, dev, "matched to %s\n", drv->name);
1045                         return 1;
1046                 }
1047                 did++;
1048         }
1049
1050         return 0;
1051 }
1052
1053 #ifdef CONFIG_HOTPLUG
1054
1055 static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
1056 {
1057         struct pcmcia_device *p_dev;
1058         int i;
1059         u32 hash[4] = { 0, 0, 0, 0};
1060
1061         if (!dev)
1062                 return -ENODEV;
1063
1064         p_dev = to_pcmcia_dev(dev);
1065
1066         /* calculate hashes */
1067         for (i=0; i<4; i++) {
1068                 if (!p_dev->prod_id[i])
1069                         continue;
1070                 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
1071         }
1072
1073         if (add_uevent_var(env, "SOCKET_NO=%u", p_dev->socket->sock))
1074                 return -ENOMEM;
1075
1076         if (add_uevent_var(env, "DEVICE_NO=%02X", p_dev->device_no))
1077                 return -ENOMEM;
1078
1079         if (add_uevent_var(env, "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
1080                            "pa%08Xpb%08Xpc%08Xpd%08X",
1081                            p_dev->has_manf_id ? p_dev->manf_id : 0,
1082                            p_dev->has_card_id ? p_dev->card_id : 0,
1083                            p_dev->has_func_id ? p_dev->func_id : 0,
1084                            p_dev->func,
1085                            p_dev->device_no,
1086                            hash[0],
1087                            hash[1],
1088                            hash[2],
1089                            hash[3]))
1090                 return -ENOMEM;
1091
1092         return 0;
1093 }
1094
1095 #else
1096
1097 static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
1098 {
1099         return -ENODEV;
1100 }
1101
1102 #endif
1103
1104 /************************ runtime PM support ***************************/
1105
1106 static int pcmcia_dev_suspend(struct device *dev, pm_message_t state);
1107 static int pcmcia_dev_resume(struct device *dev);
1108
1109 static int runtime_suspend(struct device *dev)
1110 {
1111         int rc;
1112
1113         down(&dev->sem);
1114         rc = pcmcia_dev_suspend(dev, PMSG_SUSPEND);
1115         up(&dev->sem);
1116         return rc;
1117 }
1118
1119 static void runtime_resume(struct device *dev)
1120 {
1121         int rc;
1122
1123         down(&dev->sem);
1124         rc = pcmcia_dev_resume(dev);
1125         up(&dev->sem);
1126 }
1127
1128 /************************ per-device sysfs output ***************************/
1129
1130 #define pcmcia_device_attr(field, test, format)                         \
1131 static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf)              \
1132 {                                                                       \
1133         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);               \
1134         return p_dev->test ? sprintf (buf, format, p_dev->field) : -ENODEV; \
1135 }
1136
1137 #define pcmcia_device_stringattr(name, field)                                   \
1138 static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf)               \
1139 {                                                                       \
1140         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);               \
1141         return p_dev->field ? sprintf (buf, "%s\n", p_dev->field) : -ENODEV; \
1142 }
1143
1144 pcmcia_device_attr(func, socket, "0x%02x\n");
1145 pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
1146 pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
1147 pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
1148 pcmcia_device_stringattr(prod_id1, prod_id[0]);
1149 pcmcia_device_stringattr(prod_id2, prod_id[1]);
1150 pcmcia_device_stringattr(prod_id3, prod_id[2]);
1151 pcmcia_device_stringattr(prod_id4, prod_id[3]);
1152
1153
1154 static ssize_t pcmcia_show_pm_state(struct device *dev, struct device_attribute *attr, char *buf)
1155 {
1156         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1157
1158         if (p_dev->suspended)
1159                 return sprintf(buf, "off\n");
1160         else
1161                 return sprintf(buf, "on\n");
1162 }
1163
1164 static ssize_t pcmcia_store_pm_state(struct device *dev, struct device_attribute *attr,
1165                                      const char *buf, size_t count)
1166 {
1167         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1168         int ret = 0;
1169
1170         if (!count)
1171                 return -EINVAL;
1172
1173         if ((!p_dev->suspended) && !strncmp(buf, "off", 3))
1174                 ret = runtime_suspend(dev);
1175         else if (p_dev->suspended && !strncmp(buf, "on", 2))
1176                 runtime_resume(dev);
1177
1178         return ret ? ret : count;
1179 }
1180
1181
1182 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1183 {
1184         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1185         int i;
1186         u32 hash[4] = { 0, 0, 0, 0};
1187
1188         /* calculate hashes */
1189         for (i=0; i<4; i++) {
1190                 if (!p_dev->prod_id[i])
1191                         continue;
1192                 hash[i] = crc32(0,p_dev->prod_id[i],strlen(p_dev->prod_id[i]));
1193         }
1194         return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
1195                                 "pa%08Xpb%08Xpc%08Xpd%08X\n",
1196                                 p_dev->has_manf_id ? p_dev->manf_id : 0,
1197                                 p_dev->has_card_id ? p_dev->card_id : 0,
1198                                 p_dev->has_func_id ? p_dev->func_id : 0,
1199                                 p_dev->func, p_dev->device_no,
1200                                 hash[0], hash[1], hash[2], hash[3]);
1201 }
1202
1203 static ssize_t pcmcia_store_allow_func_id_match(struct device *dev,
1204                 struct device_attribute *attr, const char *buf, size_t count)
1205 {
1206         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1207         int ret;
1208
1209         if (!count)
1210                 return -EINVAL;
1211
1212         mutex_lock(&p_dev->socket->skt_mutex);
1213         p_dev->allow_func_id_match = 1;
1214         mutex_unlock(&p_dev->socket->skt_mutex);
1215
1216         ret = bus_rescan_devices(&pcmcia_bus_type);
1217         if (ret)
1218                 printk(KERN_INFO "pcmcia: bus_rescan_devices failed after "
1219                        "allowing func_id matches\n");
1220
1221         return count;
1222 }
1223
1224 static struct device_attribute pcmcia_dev_attrs[] = {
1225         __ATTR(function, 0444, func_show, NULL),
1226         __ATTR(pm_state, 0644, pcmcia_show_pm_state, pcmcia_store_pm_state),
1227         __ATTR_RO(func_id),
1228         __ATTR_RO(manf_id),
1229         __ATTR_RO(card_id),
1230         __ATTR_RO(prod_id1),
1231         __ATTR_RO(prod_id2),
1232         __ATTR_RO(prod_id3),
1233         __ATTR_RO(prod_id4),
1234         __ATTR_RO(modalias),
1235         __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match),
1236         __ATTR_NULL,
1237 };
1238
1239 /* PM support, also needed for reset */
1240
1241 static int pcmcia_dev_suspend(struct device * dev, pm_message_t state)
1242 {
1243         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1244         struct pcmcia_driver *p_drv = NULL;
1245         int ret = 0;
1246
1247         if (p_dev->suspended)
1248                 return 0;
1249
1250         ds_dev_dbg(2, dev, "suspending\n");
1251
1252         if (dev->driver)
1253                 p_drv = to_pcmcia_drv(dev->driver);
1254
1255         if (!p_drv)
1256                 goto out;
1257
1258         if (p_drv->suspend) {
1259                 ret = p_drv->suspend(p_dev);
1260                 if (ret) {
1261                         dev_printk(KERN_ERR, dev,
1262                                    "pcmcia: device %s (driver %s) did "
1263                                    "not want to go to sleep (%d)\n",
1264                                    p_dev->devname, p_drv->drv.name, ret);
1265                         goto out;
1266                 }
1267         }
1268
1269         if (p_dev->device_no == p_dev->func) {
1270                 ds_dev_dbg(2, dev, "releasing configuration\n");
1271                 pcmcia_release_configuration(p_dev);
1272         }
1273
1274  out:
1275         if (!ret)
1276                 p_dev->suspended = 1;
1277         return ret;
1278 }
1279
1280
1281 static int pcmcia_dev_resume(struct device * dev)
1282 {
1283         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1284         struct pcmcia_driver *p_drv = NULL;
1285         int ret = 0;
1286
1287         if (!p_dev->suspended)
1288                 return 0;
1289
1290         ds_dev_dbg(2, dev, "resuming\n");
1291
1292         if (dev->driver)
1293                 p_drv = to_pcmcia_drv(dev->driver);
1294
1295         if (!p_drv)
1296                 goto out;
1297
1298         if (p_dev->device_no == p_dev->func) {
1299                 ds_dev_dbg(2, dev, "requesting configuration\n");
1300                 ret = pcmcia_request_configuration(p_dev, &p_dev->conf);
1301                 if (ret)
1302                         goto out;
1303         }
1304
1305         if (p_drv->resume)
1306                 ret = p_drv->resume(p_dev);
1307
1308  out:
1309         if (!ret)
1310                 p_dev->suspended = 0;
1311         return ret;
1312 }
1313
1314
1315 static int pcmcia_bus_suspend_callback(struct device *dev, void * _data)
1316 {
1317         struct pcmcia_socket *skt = _data;
1318         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1319
1320         if (p_dev->socket != skt || p_dev->suspended)
1321                 return 0;
1322
1323         return runtime_suspend(dev);
1324 }
1325
1326 static int pcmcia_bus_resume_callback(struct device *dev, void * _data)
1327 {
1328         struct pcmcia_socket *skt = _data;
1329         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1330
1331         if (p_dev->socket != skt || !p_dev->suspended)
1332                 return 0;
1333
1334         runtime_resume(dev);
1335
1336         return 0;
1337 }
1338
1339 static int pcmcia_bus_resume(struct pcmcia_socket *skt)
1340 {
1341         ds_dev_dbg(2, &skt->dev, "resuming socket %d\n", skt->sock);
1342         bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback);
1343         return 0;
1344 }
1345
1346 static int pcmcia_bus_suspend(struct pcmcia_socket *skt)
1347 {
1348         ds_dev_dbg(2, &skt->dev, "suspending socket %d\n", skt->sock);
1349         if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt,
1350                              pcmcia_bus_suspend_callback)) {
1351                 pcmcia_bus_resume(skt);
1352                 return -EIO;
1353         }
1354         return 0;
1355 }
1356
1357
1358 /*======================================================================
1359
1360     The card status event handler.
1361
1362 ======================================================================*/
1363
1364 /* Normally, the event is passed to individual drivers after
1365  * informing userspace. Only for CS_EVENT_CARD_REMOVAL this
1366  * is inversed to maintain historic compatibility.
1367  */
1368
1369 static int ds_event(struct pcmcia_socket *skt, event_t event, int priority)
1370 {
1371         struct pcmcia_socket *s = pcmcia_get_socket(skt);
1372
1373         if (!s) {
1374                 dev_printk(KERN_ERR, &skt->dev,
1375                            "PCMCIA obtaining reference to socket "      \
1376                            "failed, event 0x%x lost!\n", event);
1377                 return -ENODEV;
1378         }
1379
1380         ds_dev_dbg(1, &skt->dev, "ds_event(0x%06x, %d, 0x%p)\n",
1381                    event, priority, skt);
1382
1383         switch (event) {
1384         case CS_EVENT_CARD_REMOVAL:
1385                 s->pcmcia_state.present = 0;
1386                 pcmcia_card_remove(skt, NULL);
1387                 handle_event(skt, event);
1388                 break;
1389
1390         case CS_EVENT_CARD_INSERTION:
1391                 s->pcmcia_state.present = 1;
1392                 pcmcia_card_add(skt);
1393                 handle_event(skt, event);
1394                 break;
1395
1396         case CS_EVENT_EJECTION_REQUEST:
1397                 break;
1398
1399         case CS_EVENT_PM_SUSPEND:
1400         case CS_EVENT_PM_RESUME:
1401         case CS_EVENT_RESET_PHYSICAL:
1402         case CS_EVENT_CARD_RESET:
1403         default:
1404                 handle_event(skt, event);
1405                 break;
1406     }
1407
1408     pcmcia_put_socket(s);
1409
1410     return 0;
1411 } /* ds_event */
1412
1413
1414 struct pcmcia_device * pcmcia_dev_present(struct pcmcia_device *_p_dev)
1415 {
1416         struct pcmcia_device *p_dev;
1417         struct pcmcia_device *ret = NULL;
1418
1419         p_dev = pcmcia_get_dev(_p_dev);
1420         if (!p_dev)
1421                 return NULL;
1422
1423         if (!p_dev->socket->pcmcia_state.present)
1424                 goto out;
1425
1426         if (p_dev->_removed)
1427                 goto out;
1428
1429         if (p_dev->suspended)
1430                 goto out;
1431
1432         ret = p_dev;
1433  out:
1434         pcmcia_put_dev(p_dev);
1435         return ret;
1436 }
1437 EXPORT_SYMBOL(pcmcia_dev_present);
1438
1439
1440 static struct pcmcia_callback pcmcia_bus_callback = {
1441         .owner = THIS_MODULE,
1442         .event = ds_event,
1443         .requery = pcmcia_bus_rescan,
1444         .suspend = pcmcia_bus_suspend,
1445         .resume = pcmcia_bus_resume,
1446 };
1447
1448 static int __devinit pcmcia_bus_add_socket(struct device *dev,
1449                                            struct class_interface *class_intf)
1450 {
1451         struct pcmcia_socket *socket = dev_get_drvdata(dev);
1452         int ret;
1453
1454         socket = pcmcia_get_socket(socket);
1455         if (!socket) {
1456                 dev_printk(KERN_ERR, dev,
1457                            "PCMCIA obtaining reference to socket failed\n");
1458                 return -ENODEV;
1459         }
1460
1461         /*
1462          * Ugly. But we want to wait for the socket threads to have started up.
1463          * We really should let the drivers themselves drive some of this..
1464          */
1465         msleep(250);
1466
1467 #ifdef CONFIG_PCMCIA_IOCTL
1468         init_waitqueue_head(&socket->queue);
1469 #endif
1470         INIT_LIST_HEAD(&socket->devices_list);
1471         INIT_WORK(&socket->device_add, pcmcia_delayed_add_device);
1472         memset(&socket->pcmcia_state, 0, sizeof(u8));
1473         socket->device_count = 0;
1474
1475         ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback);
1476         if (ret) {
1477                 dev_printk(KERN_ERR, dev, "PCMCIA registration failed\n");
1478                 pcmcia_put_socket(socket);
1479                 return (ret);
1480         }
1481
1482         return 0;
1483 }
1484
1485 static void pcmcia_bus_remove_socket(struct device *dev,
1486                                      struct class_interface *class_intf)
1487 {
1488         struct pcmcia_socket *socket = dev_get_drvdata(dev);
1489
1490         if (!socket)
1491                 return;
1492
1493         socket->pcmcia_state.dead = 1;
1494         pccard_register_pcmcia(socket, NULL);
1495
1496         /* unregister any unbound devices */
1497         mutex_lock(&socket->skt_mutex);
1498         pcmcia_card_remove(socket, NULL);
1499         mutex_unlock(&socket->skt_mutex);
1500
1501         pcmcia_put_socket(socket);
1502
1503         return;
1504 }
1505
1506
1507 /* the pcmcia_bus_interface is used to handle pcmcia socket devices */
1508 static struct class_interface pcmcia_bus_interface __refdata = {
1509         .class = &pcmcia_socket_class,
1510         .add_dev = &pcmcia_bus_add_socket,
1511         .remove_dev = &pcmcia_bus_remove_socket,
1512 };
1513
1514
1515 struct bus_type pcmcia_bus_type = {
1516         .name = "pcmcia",
1517         .uevent = pcmcia_bus_uevent,
1518         .match = pcmcia_bus_match,
1519         .dev_attrs = pcmcia_dev_attrs,
1520         .probe = pcmcia_device_probe,
1521         .remove = pcmcia_device_remove,
1522         .suspend = pcmcia_dev_suspend,
1523         .resume = pcmcia_dev_resume,
1524 };
1525
1526
1527 static int __init init_pcmcia_bus(void)
1528 {
1529         int ret;
1530
1531         spin_lock_init(&pcmcia_dev_list_lock);
1532
1533         ret = bus_register(&pcmcia_bus_type);
1534         if (ret < 0) {
1535                 printk(KERN_WARNING "pcmcia: bus_register error: %d\n", ret);
1536                 return ret;
1537         }
1538         ret = class_interface_register(&pcmcia_bus_interface);
1539         if (ret < 0) {
1540                 printk(KERN_WARNING
1541                         "pcmcia: class_interface_register error: %d\n", ret);
1542                 bus_unregister(&pcmcia_bus_type);
1543                 return ret;
1544         }
1545
1546         pcmcia_setup_ioctl();
1547
1548         return 0;
1549 }
1550 fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that
1551                                * pcmcia_socket_class is already registered */
1552
1553
1554 static void __exit exit_pcmcia_bus(void)
1555 {
1556         pcmcia_cleanup_ioctl();
1557
1558         class_interface_unregister(&pcmcia_bus_interface);
1559
1560         bus_unregister(&pcmcia_bus_type);
1561 }
1562 module_exit(exit_pcmcia_bus);
1563
1564
1565 MODULE_ALIAS("ds");