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_ADAPTER,           "Bad adapter" },
  79     { CS_BAD_ATTRIBUTE,         "Bad attribute", },
  80     { CS_BAD_BASE,              "Bad base address" },
  81     { CS_BAD_EDC,               "Bad EDC" },
  82     { CS_BAD_IRQ,               "Bad IRQ" },
  83     { CS_BAD_OFFSET,            "Bad offset" },
  84     { CS_BAD_PAGE,              "Bad page number" },
  85     { CS_READ_FAILURE,          "Read failure" },
  86     { CS_BAD_SIZE,              "Bad size" },
  87     { CS_BAD_SOCKET,            "Bad socket" },
  88     { CS_BAD_TYPE,              "Bad type" },
  89     { CS_BAD_VCC,               "Bad Vcc" },
  90     { CS_BAD_VPP,               "Bad Vpp" },
  91     { CS_BAD_WINDOW,            "Bad window" },
  92     { CS_WRITE_FAILURE,         "Write failure" },
  93     { CS_NO_CARD,               "No card present" },
  94     { CS_UNSUPPORTED_FUNCTION,  "Usupported function" },
  95     { CS_UNSUPPORTED_MODE,      "Unsupported mode" },
  96     { CS_BAD_SPEED,             "Bad speed" },
  97     { CS_BUSY,                  "Resource busy" },
  98     { CS_GENERAL_FAILURE,       "General failure" },
  99     { CS_WRITE_PROTECTED,       "Write protected" },
 100     { CS_BAD_ARG_LENGTH,        "Bad argument length" },
 101     { CS_BAD_ARGS,              "Bad arguments" },
 102     { CS_CONFIGURATION_LOCKED,  "Configuration locked" },
 103     { CS_IN_USE,                "Resource in use" },
 104     { CS_NO_MORE_ITEMS,         "No more items" },
 105     { CS_OUT_OF_RESOURCE,       "Out of resource" },
 106     { CS_BAD_HANDLE,            "Bad handle" },
 107     { CS_BAD_TUPLE,             "Bad CIS tuple" }
 108 };
 109
 110
 111 static const lookup_t service_table[] = {
 112     { AccessConfigurationRegister,      "AccessConfigurationRegister" },
 113     { AddSocketServices,                "AddSocketServices" },
 114     { AdjustResourceInfo,               "AdjustResourceInfo" },
 115     { CheckEraseQueue,                  "CheckEraseQueue" },
 116     { CloseMemory,                      "CloseMemory" },
 117     { DeregisterClient,                 "DeregisterClient" },
 118     { DeregisterEraseQueue,             "DeregisterEraseQueue" },
 119     { GetCardServicesInfo,              "GetCardServicesInfo" },
 120     { GetClientInfo,                    "GetClientInfo" },
 121     { GetConfigurationInfo,             "GetConfigurationInfo" },
 122     { GetEventMask,                     "GetEventMask" },
 123     { GetFirstClient,                   "GetFirstClient" },
 124     { GetFirstRegion,                   "GetFirstRegion" },
 125     { GetFirstTuple,                    "GetFirstTuple" },
 126     { GetNextClient,                    "GetNextClient" },
 127     { GetNextRegion,                    "GetNextRegion" },
 128     { GetNextTuple,                     "GetNextTuple" },
 129     { GetStatus,                        "GetStatus" },
 130     { GetTupleData,                     "GetTupleData" },
 131     { MapMemPage,                       "MapMemPage" },
 132     { ModifyConfiguration,              "ModifyConfiguration" },
 133     { ModifyWindow,                     "ModifyWindow" },
 134     { OpenMemory,                       "OpenMemory" },
 135     { ParseTuple,                       "ParseTuple" },
 136     { ReadMemory,                       "ReadMemory" },
 137     { RegisterClient,                   "RegisterClient" },
 138     { RegisterEraseQueue,               "RegisterEraseQueue" },
 139     { RegisterMTD,                      "RegisterMTD" },
 140     { ReleaseConfiguration,             "ReleaseConfiguration" },
 141     { ReleaseIO,                        "ReleaseIO" },
 142     { ReleaseIRQ,                       "ReleaseIRQ" },
 143     { ReleaseWindow,                    "ReleaseWindow" },
 144     { RequestConfiguration,             "RequestConfiguration" },
 145     { RequestIO,                        "RequestIO" },
 146     { RequestIRQ,                       "RequestIRQ" },
 147     { RequestSocketMask,                "RequestSocketMask" },
 148     { RequestWindow,                    "RequestWindow" },
 149     { ResetCard,                        "ResetCard" },
 150     { SetEventMask,                     "SetEventMask" },
 151     { ValidateCIS,                      "ValidateCIS" },
 152     { WriteMemory,                      "WriteMemory" },
 153     { BindDevice,                       "BindDevice" },
 154     { BindMTD,                          "BindMTD" },
 155     { ReportError,                      "ReportError" },
 156     { SuspendCard,                      "SuspendCard" },
 157     { ResumeCard,                       "ResumeCard" },
 158     { EjectCard,                        "EjectCard" },
 159     { InsertCard,                       "InsertCard" },
 160     { ReplaceCIS,                       "ReplaceCIS" }
 161 };
 162
 163
 164 static int pcmcia_report_error(struct pcmcia_device *p_dev, error_info_t *err)
 165 {
 166         int i;
 167         char *serv;
 168
 169         if (!p_dev)
 170                 printk(KERN_NOTICE);
 171         else
 172                 printk(KERN_NOTICE "%s: ", p_dev->dev.bus_id);
 173
 174         for (i = 0; i < ARRAY_SIZE(service_table); i++)
 175                 if (service_table[i].key == err->func)
 176                         break;
 177         if (i < ARRAY_SIZE(service_table))
 178                 serv = service_table[i].msg;
 179         else
 180                 serv = "Unknown service number";
 181
 182         for (i = 0; i < ARRAY_SIZE(error_table); i++)
 183                 if (error_table[i].key == err->retcode)
 184                         break;
 185         if (i < ARRAY_SIZE(error_table))
 186                 printk("%s: %s\n", serv, error_table[i].msg);
 187         else
 188                 printk("%s: Unknown error code %#x\n", serv, err->retcode);
 189
 190         return CS_SUCCESS;
 191 } /* report_error */
 192
 193 /* end of code which was in cs.c before */
 194
 195 /*======================================================================*/
 196
 197 void cs_error(struct pcmcia_device *p_dev, int func, int ret)
 198 {
 199         error_info_t err = { func, ret };
 200         pcmcia_report_error(p_dev, &err);
 201 }
 202 EXPORT_SYMBOL(cs_error);
 203
 204
 205 static void pcmcia_check_driver(struct pcmcia_driver *p_drv)
 206 {
 207         struct pcmcia_device_id *did = p_drv->id_table;
 208         unsigned int i;
 209         u32 hash;
 210
 211         if (!p_drv->probe || !p_drv->remove)
 212                 printk(KERN_DEBUG "pcmcia: %s lacks a requisite callback "
 213                        "function\n", p_drv->drv.name);
 214
 215         while (did && did->match_flags) {
 216                 for (i=0; i<4; i++) {
 217                         if (!did->prod_id[i])
 218                                 continue;
 219
 220                         hash = crc32(0, did->prod_id[i], strlen(did->prod_id[i]));
 221                         if (hash == did->prod_id_hash[i])
 222                                 continue;
 223
 224                         printk(KERN_DEBUG "pcmcia: %s: invalid hash for "
 225                                "product string \"%s\": is 0x%x, should "
 226                                "be 0x%x\n", p_drv->drv.name, did->prod_id[i],
 227                                did->prod_id_hash[i], hash);
 228                         printk(KERN_DEBUG "pcmcia: see "
 229                                 "Documentation/pcmcia/devicetable.txt for "
 230                                 "details\n");
 231                 }
 232                 did++;
 233         }
 234
 235         return;
 236 }
 237
 238
 239 /*======================================================================*/
 240
 241
 242 struct pcmcia_dynid {
 243         struct list_head                node;
 244         struct pcmcia_device_id         id;
 245 };
 246
 247 /**
 248  * pcmcia_store_new_id - add a new PCMCIA device ID to this driver and re-probe devices
 249  * @driver: target device driver
 250  * @buf: buffer for scanning device ID data
 251  * @count: input size
 252  *
 253  * Adds a new dynamic PCMCIA device ID to this driver,
 254  * and causes the driver to probe for all devices again.
 255  */
 256 static ssize_t
 257 pcmcia_store_new_id(struct device_driver *driver, const char *buf, size_t count)
 258 {
 259         struct pcmcia_dynid *dynid;
 260         struct pcmcia_driver *pdrv = to_pcmcia_drv(driver);
 261         __u16 match_flags, manf_id, card_id;
 262         __u8 func_id, function, device_no;
 263         __u32 prod_id_hash[4] = {0, 0, 0, 0};
 264         int fields=0;
 265         int retval = 0;
 266
 267         fields = sscanf(buf, "%hx %hx %hx %hhx %hhx %hhx %x %x %x %x",
 268                         &match_flags, &manf_id, &card_id, &func_id, &function, &device_no,
 269                         &prod_id_hash[0], &prod_id_hash[1], &prod_id_hash[2], &prod_id_hash[3]);
 270         if (fields < 6)
 271                 return -EINVAL;
 272
 273         dynid = kzalloc(sizeof(struct pcmcia_dynid), GFP_KERNEL);
 274         if (!dynid)
 275                 return -ENOMEM;
 276
 277         INIT_LIST_HEAD(&dynid->node);
 278         dynid->id.match_flags = match_flags;
 279         dynid->id.manf_id = manf_id;
 280         dynid->id.card_id = card_id;
 281         dynid->id.func_id = func_id;
 282         dynid->id.function = function;
 283         dynid->id.device_no = device_no;
 284         memcpy(dynid->id.prod_id_hash, prod_id_hash, sizeof(__u32) * 4);
 285
 286         spin_lock(&pdrv->dynids.lock);
 287         list_add_tail(&pdrv->dynids.list, &dynid->node);
 288         spin_unlock(&pdrv->dynids.lock);
 289
 290         if (get_driver(&pdrv->drv)) {
 291                 retval = driver_attach(&pdrv->drv);
 292                 put_driver(&pdrv->drv);
 293         }
 294
 295         if (retval)
 296                 return retval;
 297         return count;
 298 }
 299 static DRIVER_ATTR(new_id, S_IWUSR, NULL, pcmcia_store_new_id);
 300
 301 static void
 302 pcmcia_free_dynids(struct pcmcia_driver *drv)
 303 {
 304         struct pcmcia_dynid *dynid, *n;
 305
 306         spin_lock(&drv->dynids.lock);
 307         list_for_each_entry_safe(dynid, n, &drv->dynids.list, node) {
 308                 list_del(&dynid->node);
 309                 kfree(dynid);
 310         }
 311         spin_unlock(&drv->dynids.lock);
 312 }
 313
 314 static int
 315 pcmcia_create_newid_file(struct pcmcia_driver *drv)
 316 {
 317         int error = 0;
 318         if (drv->probe != NULL)
 319                 error = driver_create_file(&drv->drv, &driver_attr_new_id);
 320         return error;
 321 }
 322
 323
 324 /**
 325  * pcmcia_register_driver - register a PCMCIA driver with the bus core
 326  * @driver: the &driver being registered
 327  *
 328  * Registers a PCMCIA driver with the PCMCIA bus core.
 329  */
 330 int pcmcia_register_driver(struct pcmcia_driver *driver)
 331 {
 332         int error;
 333
 334         if (!driver)
 335                 return -EINVAL;
 336
 337         pcmcia_check_driver(driver);
 338
 339         /* initialize common fields */
 340         driver->drv.bus = &pcmcia_bus_type;
 341         driver->drv.owner = driver->owner;
 342         spin_lock_init(&driver->dynids.lock);
 343         INIT_LIST_HEAD(&driver->dynids.list);
 344
 345         ds_dbg(3, "registering driver %s\n", driver->drv.name);
 346
 347         error = driver_register(&driver->drv);
 348         if (error < 0)
 349                 return error;
 350
 351         error = pcmcia_create_newid_file(driver);
 352         if (error)
 353                 driver_unregister(&driver->drv);
 354
 355         return error;
 356 }
 357 EXPORT_SYMBOL(pcmcia_register_driver);
 358
 359 /**
 360  * pcmcia_unregister_driver - unregister a PCMCIA driver with the bus core
 361  * @driver: the &driver being unregistered
 362  */
 363 void pcmcia_unregister_driver(struct pcmcia_driver *driver)
 364 {
 365         ds_dbg(3, "unregistering driver %s\n", driver->drv.name);
 366         driver_unregister(&driver->drv);
 367         pcmcia_free_dynids(driver);
 368 }
 369 EXPORT_SYMBOL(pcmcia_unregister_driver);
 370
 371
 372 /* pcmcia_device handling */
 373
 374 struct pcmcia_device * pcmcia_get_dev(struct pcmcia_device *p_dev)
 375 {
 376         struct device *tmp_dev;
 377         tmp_dev = get_device(&p_dev->dev);
 378         if (!tmp_dev)
 379                 return NULL;
 380         return to_pcmcia_dev(tmp_dev);
 381 }
 382
 383 void pcmcia_put_dev(struct pcmcia_device *p_dev)
 384 {
 385         if (p_dev)
 386                 put_device(&p_dev->dev);
 387 }
 388
 389 static void pcmcia_release_function(struct kref *ref)
 390 {
 391         struct config_t *c = container_of(ref, struct config_t, ref);
 392         ds_dbg(1, "releasing config_t\n");
 393         kfree(c);
 394 }
 395
 396 static void pcmcia_release_dev(struct device *dev)
 397 {
 398         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 399         ds_dev_dbg(1, dev, "releasing device\n");
 400         pcmcia_put_socket(p_dev->socket);
 401         kfree(p_dev->devname);
 402         kref_put(&p_dev->function_config->ref, pcmcia_release_function);
 403         kfree(p_dev);
 404 }
 405
 406 static void pcmcia_add_device_later(struct pcmcia_socket *s, int mfc)
 407 {
 408         if (!s->pcmcia_state.device_add_pending) {
 409                 ds_dev_dbg(1, &s->dev, "scheduling to add %s secondary"
 410                        " device to %d\n", mfc ? "mfc" : "pfc", s->sock);
 411                 s->pcmcia_state.device_add_pending = 1;
 412                 s->pcmcia_state.mfc_pfc = mfc;
 413                 schedule_work(&s->device_add);
 414         }
 415         return;
 416 }
 417
 418 static int pcmcia_device_probe(struct device * dev)
 419 {
 420         struct pcmcia_device *p_dev;
 421         struct pcmcia_driver *p_drv;
 422         struct pcmcia_device_id *did;
 423         struct pcmcia_socket *s;
 424         cistpl_config_t cis_config;
 425         int ret = 0;
 426
 427         dev = get_device(dev);
 428         if (!dev)
 429                 return -ENODEV;
 430
 431         p_dev = to_pcmcia_dev(dev);
 432         p_drv = to_pcmcia_drv(dev->driver);
 433         s = p_dev->socket;
 434
 435         ds_dev_dbg(1, dev, "trying to bind to %s\n", p_drv->drv.name);
 436
 437         if ((!p_drv->probe) || (!p_dev->function_config) ||
 438             (!try_module_get(p_drv->owner))) {
 439                 ret = -EINVAL;
 440                 goto put_dev;
 441         }
 442
 443         /* set up some more device information */
 444         ret = pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_CONFIG,
 445                                 &cis_config);
 446         if (!ret) {
 447                 p_dev->conf.ConfigBase = cis_config.base;
 448                 p_dev->conf.Present = cis_config.rmask[0];
 449         } else {
 450                 dev_printk(KERN_INFO, dev,
 451                            "pcmcia: could not parse base and rmask0 of CIS\n");
 452                 p_dev->conf.ConfigBase = 0;
 453                 p_dev->conf.Present = 0;
 454         }
 455
 456         ret = p_drv->probe(p_dev);
 457         if (ret) {
 458                 ds_dev_dbg(1, dev, "binding to %s failed with %d\n",
 459                            p_drv->drv.name, ret);
 460                 goto put_module;
 461         }
 462
 463         /* handle pseudo multifunction devices:
 464          * there are at most two pseudo multifunction devices.
 465          * if we're matching against the first, schedule a
 466          * call which will then check whether there are two
 467          * pseudo devices, and if not, add the second one.
 468          */
 469         did = p_dev->dev.driver_data;
 470         if (did && (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) &&
 471             (p_dev->socket->device_count == 1) && (p_dev->device_no == 0))
 472                 pcmcia_add_device_later(p_dev->socket, 0);
 473
 474  put_module:
 475         if (ret)
 476                 module_put(p_drv->owner);
 477  put_dev:
 478         if (ret)
 479                 put_device(dev);
 480         return (ret);
 481 }
 482
 483
 484 /*
 485  * Removes a PCMCIA card from the device tree and socket list.
 486  */
 487 static void pcmcia_card_remove(struct pcmcia_socket *s, struct pcmcia_device *leftover)
 488 {
 489         struct pcmcia_device    *p_dev;
 490         struct pcmcia_device    *tmp;
 491         unsigned long           flags;
 492
 493         ds_dev_dbg(2, leftover ? &leftover->dev : &s->dev,
 494                    "pcmcia_card_remove(%d) %s\n", s->sock,
 495                    leftover ? leftover->devname : "");
 496
 497         if (!leftover)
 498                 s->device_count = 0;
 499         else
 500                 s->device_count = 1;
 501
 502         /* unregister all pcmcia_devices registered with this socket, except leftover */
 503         list_for_each_entry_safe(p_dev, tmp, &s->devices_list, socket_device_list) {
 504                 if (p_dev == leftover)
 505                         continue;
 506
 507                 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 508                 list_del(&p_dev->socket_device_list);
 509                 p_dev->_removed=1;
 510                 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 511
 512                 ds_dev_dbg(2, &p_dev->dev, "unregistering device\n");
 513                 device_unregister(&p_dev->dev);
 514         }
 515
 516         return;
 517 }
 518
 519 static int pcmcia_device_remove(struct device * dev)
 520 {
 521         struct pcmcia_device *p_dev;
 522         struct pcmcia_driver *p_drv;
 523         struct pcmcia_device_id *did;
 524         int i;
 525
 526         p_dev = to_pcmcia_dev(dev);
 527         p_drv = to_pcmcia_drv(dev->driver);
 528
 529         ds_dev_dbg(1, dev, "removing device\n");
 530
 531         /* If we're removing the primary module driving a
 532          * pseudo multi-function card, we need to unbind
 533          * all devices
 534          */
 535         did = p_dev->dev.driver_data;
 536         if (did && (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) &&
 537             (p_dev->socket->device_count != 0) &&
 538             (p_dev->device_no == 0))
 539                 pcmcia_card_remove(p_dev->socket, p_dev);
 540
 541         /* detach the "instance" */
 542         if (!p_drv)
 543                 return 0;
 544
 545         if (p_drv->remove)
 546                 p_drv->remove(p_dev);
 547
 548         p_dev->dev_node = NULL;
 549
 550         /* check for proper unloading */
 551         if (p_dev->_irq || p_dev->_io || p_dev->_locked)
 552                 dev_printk(KERN_INFO, dev,
 553                         "pcmcia: driver %s did not release config properly\n",
 554                         p_drv->drv.name);
 555
 556         for (i = 0; i < MAX_WIN; i++)
 557                 if (p_dev->_win & CLIENT_WIN_REQ(i))
 558                         dev_printk(KERN_INFO, dev,
 559                           "pcmcia: driver %s did not release window properly\n",
 560                            p_drv->drv.name);
 561
 562         /* references from pcmcia_probe_device */
 563         pcmcia_put_dev(p_dev);
 564         module_put(p_drv->owner);
 565
 566         return 0;
 567 }
 568
 569
 570 /*
 571  * pcmcia_device_query -- determine information about a pcmcia device
 572  */
 573 static int pcmcia_device_query(struct pcmcia_device *p_dev)
 574 {
 575         cistpl_manfid_t manf_id;
 576         cistpl_funcid_t func_id;
 577         cistpl_vers_1_t *vers1;
 578         unsigned int i;
 579
 580         vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL);
 581         if (!vers1)
 582                 return -ENOMEM;
 583
 584         if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 585                                CISTPL_MANFID, &manf_id)) {
 586                 p_dev->manf_id = manf_id.manf;
 587                 p_dev->card_id = manf_id.card;
 588                 p_dev->has_manf_id = 1;
 589                 p_dev->has_card_id = 1;
 590         }
 591
 592         if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 593                                CISTPL_FUNCID, &func_id)) {
 594                 p_dev->func_id = func_id.func;
 595                 p_dev->has_func_id = 1;
 596         } else {
 597                 /* rule of thumb: cards with no FUNCID, but with
 598                  * common memory device geometry information, are
 599                  * probably memory cards (from pcmcia-cs) */
 600                 cistpl_device_geo_t *devgeo;
 601
 602                 devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL);
 603                 if (!devgeo) {
 604                         kfree(vers1);
 605                         return -ENOMEM;
 606                 }
 607                 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 608                                       CISTPL_DEVICE_GEO, devgeo)) {
 609                         ds_dev_dbg(0, &p_dev->dev,
 610                                    "mem device geometry probably means "
 611                                    "FUNCID_MEMORY\n");
 612                         p_dev->func_id = CISTPL_FUNCID_MEMORY;
 613                         p_dev->has_func_id = 1;
 614                 }
 615                 kfree(devgeo);
 616         }
 617
 618         if (!pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_VERS_1,
 619                                vers1)) {
 620                 for (i=0; i < vers1->ns; i++) {
 621                         char *tmp;
 622                         unsigned int length;
 623
 624                         tmp = vers1->str + vers1->ofs[i];
 625
 626                         length = strlen(tmp) + 1;
 627                         if ((length < 2) || (length > 255))
 628                                 continue;
 629
 630                         p_dev->prod_id[i] = kmalloc(sizeof(char) * length,
 631                                                     GFP_KERNEL);
 632                         if (!p_dev->prod_id[i])
 633                                 continue;
 634
 635                         p_dev->prod_id[i] = strncpy(p_dev->prod_id[i],
 636                                                     tmp, length);
 637                 }
 638         }
 639
 640         kfree(vers1);
 641         return 0;
 642 }
 643
 644
 645 /* device_add_lock is needed to avoid double registration by cardmgr and kernel.
 646  * Serializes pcmcia_device_add; will most likely be removed in future.
 647  *
 648  * While it has the caveat that adding new PCMCIA devices inside(!) device_register()
 649  * won't work, this doesn't matter much at the moment: the driver core doesn't
 650  * support it either.
 651  */
 652 static DEFINE_MUTEX(device_add_lock);
 653
 654 struct pcmcia_device * pcmcia_device_add(struct pcmcia_socket *s, unsigned int function)
 655 {
 656         struct pcmcia_device *p_dev, *tmp_dev;
 657         unsigned long flags;
 658         int bus_id_len;
 659
 660         s = pcmcia_get_socket(s);
 661         if (!s)
 662                 return NULL;
 663
 664         mutex_lock(&device_add_lock);
 665
 666         ds_dbg(3, "adding device to %d, function %d\n", s->sock, function);
 667
 668         /* max of 4 devices per card */
 669         if (s->device_count == 4)
 670                 goto err_put;
 671
 672         p_dev = kzalloc(sizeof(struct pcmcia_device), GFP_KERNEL);
 673         if (!p_dev)
 674                 goto err_put;
 675
 676         p_dev->socket = s;
 677         p_dev->device_no = (s->device_count++);
 678         p_dev->func   = function;
 679
 680         p_dev->dev.bus = &pcmcia_bus_type;
 681         p_dev->dev.parent = s->dev.parent;
 682         p_dev->dev.release = pcmcia_release_dev;
 683         /* by default don't allow DMA */
 684         p_dev->dma_mask = DMA_MASK_NONE;
 685         p_dev->dev.dma_mask = &p_dev->dma_mask;
 686         bus_id_len = sprintf (p_dev->dev.bus_id, "%d.%d", p_dev->socket->sock, p_dev->device_no);
 687
 688         p_dev->devname = kmalloc(6 + bus_id_len + 1, GFP_KERNEL);
 689         if (!p_dev->devname)
 690                 goto err_free;
 691         sprintf (p_dev->devname, "pcmcia%s", p_dev->dev.bus_id);
 692         ds_dev_dbg(3, &p_dev->dev, "devname is %s\n", p_dev->devname);
 693
 694         spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 695
 696         /*
 697          * p_dev->function_config must be the same for all card functions.
 698          * Note that this is serialized by the device_add_lock, so that
 699          * only one such struct will be created.
 700          */
 701         list_for_each_entry(tmp_dev, &s->devices_list, socket_device_list)
 702                 if (p_dev->func == tmp_dev->func) {
 703                         p_dev->function_config = tmp_dev->function_config;
 704                         kref_get(&p_dev->function_config->ref);
 705                 }
 706
 707         /* Add to the list in pcmcia_bus_socket */
 708         list_add(&p_dev->socket_device_list, &s->devices_list);
 709
 710         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 711
 712         if (!p_dev->function_config) {
 713                 ds_dev_dbg(3, &p_dev->dev, "creating config_t\n");
 714                 p_dev->function_config = kzalloc(sizeof(struct config_t),
 715                                                  GFP_KERNEL);
 716                 if (!p_dev->function_config)
 717                         goto err_unreg;
 718                 kref_init(&p_dev->function_config->ref);
 719         }
 720
 721         dev_printk(KERN_NOTICE, &p_dev->dev,
 722                    "pcmcia: registering new device %s\n",
 723                    p_dev->devname);
 724
 725         pcmcia_device_query(p_dev);
 726
 727         if (device_register(&p_dev->dev))
 728                 goto err_unreg;
 729
 730         mutex_unlock(&device_add_lock);
 731
 732         return p_dev;
 733
 734  err_unreg:
 735         spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 736         list_del(&p_dev->socket_device_list);
 737         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 738
 739  err_free:
 740         kfree(p_dev->devname);
 741         kfree(p_dev);
 742         s->device_count--;
 743  err_put:
 744         mutex_unlock(&device_add_lock);
 745         pcmcia_put_socket(s);
 746
 747         return NULL;
 748 }
 749
 750
 751 static int pcmcia_card_add(struct pcmcia_socket *s)
 752 {
 753         cistpl_longlink_mfc_t mfc;
 754         unsigned int no_funcs, i, no_chains;
 755         int ret = 0;
 756
 757         if (!(s->resource_setup_done)) {
 758                 ds_dev_dbg(3, &s->dev,
 759                            "no resources available, delaying card_add\n");
 760                 return -EAGAIN; /* try again, but later... */
 761         }
 762
 763         if (pcmcia_validate_mem(s)) {
 764                 ds_dev_dbg(3, &s->dev, "validating mem resources failed, "
 765                        "delaying card_add\n");
 766                 return -EAGAIN; /* try again, but later... */
 767         }
 768
 769         ret = pccard_validate_cis(s, BIND_FN_ALL, &no_chains);
 770         if (ret || !no_chains) {
 771                 ds_dev_dbg(0, &s->dev, "invalid CIS or invalid resources\n");
 772                 return -ENODEV;
 773         }
 774
 775         if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
 776                 no_funcs = mfc.nfn;
 777         else
 778                 no_funcs = 1;
 779         s->functions = no_funcs;
 780
 781         for (i=0; i < no_funcs; i++)
 782                 pcmcia_device_add(s, i);
 783
 784         return (ret);
 785 }
 786
 787
 788 static void pcmcia_delayed_add_device(struct work_struct *work)
 789 {
 790         struct pcmcia_socket *s =
 791                 container_of(work, struct pcmcia_socket, device_add);
 792         ds_dev_dbg(1, &s->dev, "adding additional device to %d\n", s->sock);
 793         pcmcia_device_add(s, s->pcmcia_state.mfc_pfc);
 794         s->pcmcia_state.device_add_pending = 0;
 795         s->pcmcia_state.mfc_pfc = 0;
 796 }
 797
 798 static int pcmcia_requery(struct device *dev, void * _data)
 799 {
 800         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 801         if (!p_dev->dev.driver) {
 802                 ds_dev_dbg(1, dev, "update device information\n");
 803                 pcmcia_device_query(p_dev);
 804         }
 805
 806         return 0;
 807 }
 808
 809 static void pcmcia_bus_rescan(struct pcmcia_socket *skt, int new_cis)
 810 {
 811         int no_devices = 0;
 812         int ret = 0;
 813         unsigned long flags;
 814
 815         /* must be called with skt_mutex held */
 816         ds_dev_dbg(0, &skt->dev, "re-scanning socket %d\n", skt->sock);
 817
 818         spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 819         if (list_empty(&skt->devices_list))
 820                 no_devices = 1;
 821         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 822
 823         /* If this is because of a CIS override, start over */
 824         if (new_cis && !no_devices)
 825                 pcmcia_card_remove(skt, NULL);
 826
 827         /* if no devices were added for this socket yet because of
 828          * missing resource information or other trouble, we need to
 829          * do this now. */
 830         if (no_devices || new_cis) {
 831                 ret = pcmcia_card_add(skt);
 832                 if (ret)
 833                         return;
 834         }
 835
 836         /* some device information might have changed because of a CIS
 837          * update or because we can finally read it correctly... so
 838          * determine it again, overwriting old values if necessary. */
 839         bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery);
 840
 841         /* we re-scan all devices, not just the ones connected to this
 842          * socket. This does not matter, though. */
 843         ret = bus_rescan_devices(&pcmcia_bus_type);
 844         if (ret)
 845                 printk(KERN_INFO "pcmcia: bus_rescan_devices failed\n");
 846 }
 847
 848 #ifdef CONFIG_PCMCIA_LOAD_CIS
 849
 850 /**
 851  * pcmcia_load_firmware - load CIS from userspace if device-provided is broken
 852  * @dev: the pcmcia device which needs a CIS override
 853  * @filename: requested filename in /lib/firmware/
 854  *
 855  * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if
 856  * the one provided by the card is broken. The firmware files reside in
 857  * /lib/firmware/ in userspace.
 858  */
 859 static int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
 860 {
 861         struct pcmcia_socket *s = dev->socket;
 862         const struct firmware *fw;
 863         char path[FIRMWARE_NAME_MAX];
 864         int ret = -ENOMEM;
 865         int no_funcs;
 866         int old_funcs;
 867         cistpl_longlink_mfc_t mfc;
 868
 869         if (!filename)
 870                 return -EINVAL;
 871
 872         ds_dev_dbg(1, &dev->dev, "trying to load CIS file %s\n", filename);
 873
 874         if (strlen(filename) > (FIRMWARE_NAME_MAX - 1)) {
 875                 dev_printk(KERN_WARNING, &dev->dev,
 876                            "pcmcia: CIS filename is too long [%s]\n",
 877                            filename);
 878                 return -EINVAL;
 879         }
 880
 881         snprintf(path, sizeof(path), "%s", filename);
 882
 883         if (request_firmware(&fw, path, &dev->dev) == 0) {
 884                 if (fw->size >= CISTPL_MAX_CIS_SIZE) {
 885                         ret = -EINVAL;
 886                         dev_printk(KERN_ERR, &dev->dev,
 887                                    "pcmcia: CIS override is too big\n");
 888                         goto release;
 889                 }
 890
 891                 if (!pcmcia_replace_cis(s, fw->data, fw->size))
 892                         ret = 0;
 893                 else {
 894                         dev_printk(KERN_ERR, &dev->dev,
 895                                    "pcmcia: CIS override failed\n");
 896                         goto release;
 897                 }
 898
 899
 900                 /* update information */
 901                 pcmcia_device_query(dev);
 902
 903                 /* does this cis override add or remove functions? */
 904                 old_funcs = s->functions;
 905
 906                 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
 907                         no_funcs = mfc.nfn;
 908                 else
 909                         no_funcs = 1;
 910                 s->functions = no_funcs;
 911
 912                 if (old_funcs > no_funcs)
 913                         pcmcia_card_remove(s, dev);
 914                 else if (no_funcs > old_funcs)
 915                         pcmcia_add_device_later(s, 1);
 916         }
 917  release:
 918         release_firmware(fw);
 919
 920         return (ret);
 921 }
 922
 923 #else /* !CONFIG_PCMCIA_LOAD_CIS */
 924
 925 static inline int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
 926 {
 927         return -ENODEV;
 928 }
 929
 930 #endif
 931
 932
 933 static inline int pcmcia_devmatch(struct pcmcia_device *dev,
 934                                   struct pcmcia_device_id *did)
 935 {
 936         if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
 937                 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
 938                         return 0;
 939         }
 940
 941         if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
 942                 if ((!dev->has_card_id) || (dev->card_id != did->card_id))
 943                         return 0;
 944         }
 945
 946         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
 947                 if (dev->func != did->function)
 948                         return 0;
 949         }
 950
 951         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
 952                 if (!dev->prod_id[0])
 953                         return 0;
 954                 if (strcmp(did->prod_id[0], dev->prod_id[0]))
 955                         return 0;
 956         }
 957
 958         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
 959                 if (!dev->prod_id[1])
 960                         return 0;
 961                 if (strcmp(did->prod_id[1], dev->prod_id[1]))
 962                         return 0;
 963         }
 964
 965         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
 966                 if (!dev->prod_id[2])
 967                         return 0;
 968                 if (strcmp(did->prod_id[2], dev->prod_id[2]))
 969                         return 0;
 970         }
 971
 972         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
 973                 if (!dev->prod_id[3])
 974                         return 0;
 975                 if (strcmp(did->prod_id[3], dev->prod_id[3]))
 976                         return 0;
 977         }
 978
 979         if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
 980                 if (dev->device_no != did->device_no)
 981                         return 0;
 982         }
 983
 984         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
 985                 if ((!dev->has_func_id) || (dev->func_id != did->func_id))
 986                         return 0;
 987
 988                 /* if this is a pseudo-multi-function device,
 989                  * we need explicit matches */
 990                 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO)
 991                         return 0;
 992                 if (dev->device_no)
 993                         return 0;
 994
 995                 /* also, FUNC_ID matching needs to be activated by userspace
 996                  * after it has re-checked that there is no possible module
 997                  * with a prod_id/manf_id/card_id match.
 998                  */
 999                 ds_dev_dbg(0, &dev->dev,
1000                         "skipping FUNC_ID match until userspace interaction\n");
1001                 if (!dev->allow_func_id_match)
1002                         return 0;
1003         }
1004
1005         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
1006                 ds_dev_dbg(0, &dev->dev, "device needs a fake CIS\n");
1007                 if (!dev->socket->fake_cis)
1008                         pcmcia_load_firmware(dev, did->cisfile);
1009
1010                 if (!dev->socket->fake_cis)
1011                         return 0;
1012         }
1013
1014         if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
1015                 int i;
1016                 for (i=0; i<4; i++)
1017                         if (dev->prod_id[i])
1018                                 return 0;
1019                 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
1020                         return 0;
1021         }
1022
1023         dev->dev.driver_data = (void *) did;
1024
1025         return 1;
1026 }
1027
1028
1029 static int pcmcia_bus_match(struct device * dev, struct device_driver * drv) {
1030         struct pcmcia_device * p_dev = to_pcmcia_dev(dev);
1031         struct pcmcia_driver * p_drv = to_pcmcia_drv(drv);
1032         struct pcmcia_device_id *did = p_drv->id_table;
1033         struct pcmcia_dynid *dynid;
1034
1035         /* match dynamic devices first */
1036         spin_lock(&p_drv->dynids.lock);
1037         list_for_each_entry(dynid, &p_drv->dynids.list, node) {
1038                 ds_dev_dbg(3, dev, "trying to match to %s\n", drv->name);
1039                 if (pcmcia_devmatch(p_dev, &dynid->id)) {
1040                         ds_dev_dbg(0, dev, "matched to %s\n", drv->name);
1041                         spin_unlock(&p_drv->dynids.lock);
1042                         return 1;
1043                 }
1044         }
1045         spin_unlock(&p_drv->dynids.lock);
1046
1047 #ifdef CONFIG_PCMCIA_IOCTL
1048         /* matching by cardmgr */
1049         if (p_dev->cardmgr == p_drv) {
1050                 ds_dev_dbg(0, dev, "cardmgr matched to %s\n", drv->name);
1051                 return 1;
1052         }
1053 #endif
1054
1055         while (did && did->match_flags) {
1056                 ds_dev_dbg(3, dev, "trying to match to %s\n", drv->name);
1057                 if (pcmcia_devmatch(p_dev, did)) {
1058                         ds_dev_dbg(0, dev, "matched to %s\n", drv->name);
1059                         return 1;
1060                 }
1061                 did++;
1062         }
1063
1064         return 0;
1065 }
1066
1067 #ifdef CONFIG_HOTPLUG
1068
1069 static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
1070 {
1071         struct pcmcia_device *p_dev;
1072         int i;
1073         u32 hash[4] = { 0, 0, 0, 0};
1074
1075         if (!dev)
1076                 return -ENODEV;
1077
1078         p_dev = to_pcmcia_dev(dev);
1079
1080         /* calculate hashes */
1081         for (i=0; i<4; i++) {
1082                 if (!p_dev->prod_id[i])
1083                         continue;
1084                 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
1085         }
1086
1087         if (add_uevent_var(env, "SOCKET_NO=%u", p_dev->socket->sock))
1088                 return -ENOMEM;
1089
1090         if (add_uevent_var(env, "DEVICE_NO=%02X", p_dev->device_no))
1091                 return -ENOMEM;
1092
1093         if (add_uevent_var(env, "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
1094                            "pa%08Xpb%08Xpc%08Xpd%08X",
1095                            p_dev->has_manf_id ? p_dev->manf_id : 0,
1096                            p_dev->has_card_id ? p_dev->card_id : 0,
1097                            p_dev->has_func_id ? p_dev->func_id : 0,
1098                            p_dev->func,
1099                            p_dev->device_no,
1100                            hash[0],
1101                            hash[1],
1102                            hash[2],
1103                            hash[3]))
1104                 return -ENOMEM;
1105
1106         return 0;
1107 }
1108
1109 #else
1110
1111 static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
1112 {
1113         return -ENODEV;
1114 }
1115
1116 #endif
1117
1118 /************************ runtime PM support ***************************/
1119
1120 static int pcmcia_dev_suspend(struct device *dev, pm_message_t state);
1121 static int pcmcia_dev_resume(struct device *dev);
1122
1123 static int runtime_suspend(struct device *dev)
1124 {
1125         int rc;
1126
1127         down(&dev->sem);
1128         rc = pcmcia_dev_suspend(dev, PMSG_SUSPEND);
1129         up(&dev->sem);
1130         return rc;
1131 }
1132
1133 static void runtime_resume(struct device *dev)
1134 {
1135         int rc;
1136
1137         down(&dev->sem);
1138         rc = pcmcia_dev_resume(dev);
1139         up(&dev->sem);
1140 }
1141
1142 /************************ per-device sysfs output ***************************/
1143
1144 #define pcmcia_device_attr(field, test, format)                         \
1145 static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf)              \
1146 {                                                                       \
1147         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);               \
1148         return p_dev->test ? sprintf (buf, format, p_dev->field) : -ENODEV; \
1149 }
1150
1151 #define pcmcia_device_stringattr(name, field)                                   \
1152 static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf)               \
1153 {                                                                       \
1154         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);               \
1155         return p_dev->field ? sprintf (buf, "%s\n", p_dev->field) : -ENODEV; \
1156 }
1157
1158 pcmcia_device_attr(func, socket, "0x%02x\n");
1159 pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
1160 pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
1161 pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
1162 pcmcia_device_stringattr(prod_id1, prod_id[0]);
1163 pcmcia_device_stringattr(prod_id2, prod_id[1]);
1164 pcmcia_device_stringattr(prod_id3, prod_id[2]);
1165 pcmcia_device_stringattr(prod_id4, prod_id[3]);
1166
1167
1168 static ssize_t pcmcia_show_pm_state(struct device *dev, struct device_attribute *attr, char *buf)
1169 {
1170         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1171
1172         if (p_dev->suspended)
1173                 return sprintf(buf, "off\n");
1174         else
1175                 return sprintf(buf, "on\n");
1176 }
1177
1178 static ssize_t pcmcia_store_pm_state(struct device *dev, struct device_attribute *attr,
1179                                      const char *buf, size_t count)
1180 {
1181         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1182         int ret = 0;
1183
1184         if (!count)
1185                 return -EINVAL;
1186
1187         if ((!p_dev->suspended) && !strncmp(buf, "off", 3))
1188                 ret = runtime_suspend(dev);
1189         else if (p_dev->suspended && !strncmp(buf, "on", 2))
1190                 runtime_resume(dev);
1191
1192         return ret ? ret : count;
1193 }
1194
1195
1196 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1197 {
1198         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1199         int i;
1200         u32 hash[4] = { 0, 0, 0, 0};
1201
1202         /* calculate hashes */
1203         for (i=0; i<4; i++) {
1204                 if (!p_dev->prod_id[i])
1205                         continue;
1206                 hash[i] = crc32(0,p_dev->prod_id[i],strlen(p_dev->prod_id[i]));
1207         }
1208         return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
1209                                 "pa%08Xpb%08Xpc%08Xpd%08X\n",
1210                                 p_dev->has_manf_id ? p_dev->manf_id : 0,
1211                                 p_dev->has_card_id ? p_dev->card_id : 0,
1212                                 p_dev->has_func_id ? p_dev->func_id : 0,
1213                                 p_dev->func, p_dev->device_no,
1214                                 hash[0], hash[1], hash[2], hash[3]);
1215 }
1216
1217 static ssize_t pcmcia_store_allow_func_id_match(struct device *dev,
1218                 struct device_attribute *attr, const char *buf, size_t count)
1219 {
1220         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1221         int ret;
1222
1223         if (!count)
1224                 return -EINVAL;
1225
1226         mutex_lock(&p_dev->socket->skt_mutex);
1227         p_dev->allow_func_id_match = 1;
1228         mutex_unlock(&p_dev->socket->skt_mutex);
1229
1230         ret = bus_rescan_devices(&pcmcia_bus_type);
1231         if (ret)
1232                 printk(KERN_INFO "pcmcia: bus_rescan_devices failed after "
1233                        "allowing func_id matches\n");
1234
1235         return count;
1236 }
1237
1238 static struct device_attribute pcmcia_dev_attrs[] = {
1239         __ATTR(function, 0444, func_show, NULL),
1240         __ATTR(pm_state, 0644, pcmcia_show_pm_state, pcmcia_store_pm_state),
1241         __ATTR_RO(func_id),
1242         __ATTR_RO(manf_id),
1243         __ATTR_RO(card_id),
1244         __ATTR_RO(prod_id1),
1245         __ATTR_RO(prod_id2),
1246         __ATTR_RO(prod_id3),
1247         __ATTR_RO(prod_id4),
1248         __ATTR_RO(modalias),
1249         __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match),
1250         __ATTR_NULL,
1251 };
1252
1253 /* PM support, also needed for reset */
1254
1255 static int pcmcia_dev_suspend(struct device * dev, pm_message_t state)
1256 {
1257         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1258         struct pcmcia_driver *p_drv = NULL;
1259         int ret = 0;
1260
1261         if (p_dev->suspended)
1262                 return 0;
1263
1264         ds_dev_dbg(2, dev, "suspending\n");
1265
1266         if (dev->driver)
1267                 p_drv = to_pcmcia_drv(dev->driver);
1268
1269         if (!p_drv)
1270                 goto out;
1271
1272         if (p_drv->suspend) {
1273                 ret = p_drv->suspend(p_dev);
1274                 if (ret) {
1275                         dev_printk(KERN_ERR, dev,
1276                                    "pcmcia: device %s (driver %s) did "
1277                                    "not want to go to sleep (%d)\n",
1278                                    p_dev->devname, p_drv->drv.name, ret);
1279                         goto out;
1280                 }
1281         }
1282
1283         if (p_dev->device_no == p_dev->func) {
1284                 ds_dev_dbg(2, dev, "releasing configuration\n");
1285                 pcmcia_release_configuration(p_dev);
1286         }
1287
1288  out:
1289         if (!ret)
1290                 p_dev->suspended = 1;
1291         return ret;
1292 }
1293
1294
1295 static int pcmcia_dev_resume(struct device * dev)
1296 {
1297         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1298         struct pcmcia_driver *p_drv = NULL;
1299         int ret = 0;
1300
1301         if (!p_dev->suspended)
1302                 return 0;
1303
1304         ds_dev_dbg(2, dev, "resuming\n");
1305
1306         if (dev->driver)
1307                 p_drv = to_pcmcia_drv(dev->driver);
1308
1309         if (!p_drv)
1310                 goto out;
1311
1312         if (p_dev->device_no == p_dev->func) {
1313                 ds_dev_dbg(2, dev, "requesting configuration\n");
1314                 ret = pcmcia_request_configuration(p_dev, &p_dev->conf);
1315                 if (ret)
1316                         goto out;
1317         }
1318
1319         if (p_drv->resume)
1320                 ret = p_drv->resume(p_dev);
1321
1322  out:
1323         if (!ret)
1324                 p_dev->suspended = 0;
1325         return ret;
1326 }
1327
1328
1329 static int pcmcia_bus_suspend_callback(struct device *dev, void * _data)
1330 {
1331         struct pcmcia_socket *skt = _data;
1332         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1333
1334         if (p_dev->socket != skt || p_dev->suspended)
1335                 return 0;
1336
1337         return runtime_suspend(dev);
1338 }
1339
1340 static int pcmcia_bus_resume_callback(struct device *dev, void * _data)
1341 {
1342         struct pcmcia_socket *skt = _data;
1343         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1344
1345         if (p_dev->socket != skt || !p_dev->suspended)
1346                 return 0;
1347
1348         runtime_resume(dev);
1349
1350         return 0;
1351 }
1352
1353 static int pcmcia_bus_resume(struct pcmcia_socket *skt)
1354 {
1355         ds_dev_dbg(2, &skt->dev, "resuming socket %d\n", skt->sock);
1356         bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback);
1357         return 0;
1358 }
1359
1360 static int pcmcia_bus_suspend(struct pcmcia_socket *skt)
1361 {
1362         ds_dev_dbg(2, &skt->dev, "suspending socket %d\n", skt->sock);
1363         if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt,
1364                              pcmcia_bus_suspend_callback)) {
1365                 pcmcia_bus_resume(skt);
1366                 return -EIO;
1367         }
1368         return 0;
1369 }
1370
1371
1372 /*======================================================================
1373
1374     The card status event handler.
1375
1376 ======================================================================*/
1377
1378 /* Normally, the event is passed to individual drivers after
1379  * informing userspace. Only for CS_EVENT_CARD_REMOVAL this
1380  * is inversed to maintain historic compatibility.
1381  */
1382
1383 static int ds_event(struct pcmcia_socket *skt, event_t event, int priority)
1384 {
1385         struct pcmcia_socket *s = pcmcia_get_socket(skt);
1386
1387         if (!s) {
1388                 dev_printk(KERN_ERR, &skt->dev,
1389                            "PCMCIA obtaining reference to socket "      \
1390                            "failed, event 0x%x lost!\n", event);
1391                 return -ENODEV;
1392         }
1393
1394         ds_dev_dbg(1, &skt->dev, "ds_event(0x%06x, %d, 0x%p)\n",
1395                    event, priority, skt);
1396
1397         switch (event) {
1398         case CS_EVENT_CARD_REMOVAL:
1399                 s->pcmcia_state.present = 0;
1400                 pcmcia_card_remove(skt, NULL);
1401                 handle_event(skt, event);
1402                 break;
1403
1404         case CS_EVENT_CARD_INSERTION:
1405                 s->pcmcia_state.present = 1;
1406                 pcmcia_card_add(skt);
1407                 handle_event(skt, event);
1408                 break;
1409
1410         case CS_EVENT_EJECTION_REQUEST:
1411                 break;
1412
1413         case CS_EVENT_PM_SUSPEND:
1414         case CS_EVENT_PM_RESUME:
1415         case CS_EVENT_RESET_PHYSICAL:
1416         case CS_EVENT_CARD_RESET:
1417         default:
1418                 handle_event(skt, event);
1419                 break;
1420     }
1421
1422     pcmcia_put_socket(s);
1423
1424     return 0;
1425 } /* ds_event */
1426
1427
1428 struct pcmcia_device * pcmcia_dev_present(struct pcmcia_device *_p_dev)
1429 {
1430         struct pcmcia_device *p_dev;
1431         struct pcmcia_device *ret = NULL;
1432
1433         p_dev = pcmcia_get_dev(_p_dev);
1434         if (!p_dev)
1435                 return NULL;
1436
1437         if (!p_dev->socket->pcmcia_state.present)
1438                 goto out;
1439
1440         if (p_dev->_removed)
1441                 goto out;
1442
1443         if (p_dev->suspended)
1444                 goto out;
1445
1446         ret = p_dev;
1447  out:
1448         pcmcia_put_dev(p_dev);
1449         return ret;
1450 }
1451 EXPORT_SYMBOL(pcmcia_dev_present);
1452
1453
1454 static struct pcmcia_callback pcmcia_bus_callback = {
1455         .owner = THIS_MODULE,
1456         .event = ds_event,
1457         .requery = pcmcia_bus_rescan,
1458         .suspend = pcmcia_bus_suspend,
1459         .resume = pcmcia_bus_resume,
1460 };
1461
1462 static int __devinit pcmcia_bus_add_socket(struct device *dev,
1463                                            struct class_interface *class_intf)
1464 {
1465         struct pcmcia_socket *socket = dev_get_drvdata(dev);
1466         int ret;
1467
1468         socket = pcmcia_get_socket(socket);
1469         if (!socket) {
1470                 dev_printk(KERN_ERR, dev,
1471                            "PCMCIA obtaining reference to socket failed\n");
1472                 return -ENODEV;
1473         }
1474
1475         /*
1476          * Ugly. But we want to wait for the socket threads to have started up.
1477          * We really should let the drivers themselves drive some of this..
1478          */
1479         msleep(250);
1480
1481 #ifdef CONFIG_PCMCIA_IOCTL
1482         init_waitqueue_head(&socket->queue);
1483 #endif
1484         INIT_LIST_HEAD(&socket->devices_list);
1485         INIT_WORK(&socket->device_add, pcmcia_delayed_add_device);
1486         memset(&socket->pcmcia_state, 0, sizeof(u8));
1487         socket->device_count = 0;
1488
1489         ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback);
1490         if (ret) {
1491                 dev_printk(KERN_ERR, dev, "PCMCIA registration failed\n");
1492                 pcmcia_put_socket(socket);
1493                 return (ret);
1494         }
1495
1496         return 0;
1497 }
1498
1499 static void pcmcia_bus_remove_socket(struct device *dev,
1500                                      struct class_interface *class_intf)
1501 {
1502         struct pcmcia_socket *socket = dev_get_drvdata(dev);
1503
1504         if (!socket)
1505                 return;
1506
1507         socket->pcmcia_state.dead = 1;
1508         pccard_register_pcmcia(socket, NULL);
1509
1510         /* unregister any unbound devices */
1511         mutex_lock(&socket->skt_mutex);
1512         pcmcia_card_remove(socket, NULL);
1513         mutex_unlock(&socket->skt_mutex);
1514
1515         pcmcia_put_socket(socket);
1516
1517         return;
1518 }
1519
1520
1521 /* the pcmcia_bus_interface is used to handle pcmcia socket devices */
1522 static struct class_interface pcmcia_bus_interface __refdata = {
1523         .class = &pcmcia_socket_class,
1524         .add_dev = &pcmcia_bus_add_socket,
1525         .remove_dev = &pcmcia_bus_remove_socket,
1526 };
1527
1528
1529 struct bus_type pcmcia_bus_type = {
1530         .name = "pcmcia",
1531         .uevent = pcmcia_bus_uevent,
1532         .match = pcmcia_bus_match,
1533         .dev_attrs = pcmcia_dev_attrs,
1534         .probe = pcmcia_device_probe,
1535         .remove = pcmcia_device_remove,
1536         .suspend = pcmcia_dev_suspend,
1537         .resume = pcmcia_dev_resume,
1538 };
1539
1540
1541 static int __init init_pcmcia_bus(void)
1542 {
1543         int ret;
1544
1545         spin_lock_init(&pcmcia_dev_list_lock);
1546
1547         ret = bus_register(&pcmcia_bus_type);
1548         if (ret < 0) {
1549                 printk(KERN_WARNING "pcmcia: bus_register error: %d\n", ret);
1550                 return ret;
1551         }
1552         ret = class_interface_register(&pcmcia_bus_interface);
1553         if (ret < 0) {
1554                 printk(KERN_WARNING
1555                         "pcmcia: class_interface_register error: %d\n", ret);
1556                 bus_unregister(&pcmcia_bus_type);
1557                 return ret;
1558         }
1559
1560         pcmcia_setup_ioctl();
1561
1562         return 0;
1563 }
1564 fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that
1565                                * pcmcia_socket_class is already registered */
1566
1567
1568 static void __exit exit_pcmcia_bus(void)
1569 {
1570         pcmcia_cleanup_ioctl();
1571
1572         class_interface_unregister(&pcmcia_bus_interface);
1573
1574         bus_unregister(&pcmcia_bus_type);
1575 }
1576 module_exit(exit_pcmcia_bus);
1577
1578
1579 MODULE_ALIAS("ds");