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 - 2004      Dominik Brodowski
  14  */
  15
  16 #include <linux/config.h>
  17 #include <linux/module.h>
  18 #include <linux/moduleparam.h>
  19 #include <linux/init.h>
  20 #include <linux/kernel.h>
  21 #include <linux/major.h>
  22 #include <linux/string.h>
  23 #include <linux/errno.h>
  24 #include <linux/slab.h>
  25 #include <linux/mm.h>
  26 #include <linux/fcntl.h>
  27 #include <linux/sched.h>
  28 #include <linux/smp_lock.h>
  29 #include <linux/timer.h>
  30 #include <linux/ioctl.h>
  31 #include <linux/proc_fs.h>
  32 #include <linux/poll.h>
  33 #include <linux/pci.h>
  34 #include <linux/list.h>
  35 #include <linux/delay.h>
  36 #include <linux/kref.h>
  37 #include <linux/workqueue.h>
  38 #include <linux/crc32.h>
  39 #include <linux/firmware.h>
  40
  41 #include <asm/atomic.h>
  42
  43 #define IN_CARD_SERVICES
  44 #include <pcmcia/version.h>
  45 #include <pcmcia/cs_types.h>
  46 #include <pcmcia/cs.h>
  47 #include <pcmcia/bulkmem.h>
  48 #include <pcmcia/cistpl.h>
  49 #include <pcmcia/ds.h>
  50 #include <pcmcia/ss.h>
  51
  52 #include "cs_internal.h"
  53 #include "ds_internal.h"
  54
  55 /*====================================================================*/
  56
  57 /* Module parameters */
  58
  59 MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
  60 MODULE_DESCRIPTION("PCMCIA Driver Services");
  61 MODULE_LICENSE("GPL");
  62
  63 #ifdef DEBUG
  64 int ds_pc_debug;
  65
  66 module_param_named(pc_debug, ds_pc_debug, int, 0644);
  67
  68 #define ds_dbg(lvl, fmt, arg...) do {                           \
  69         if (ds_pc_debug > (lvl))                                        \
  70                 printk(KERN_DEBUG "ds: " fmt , ## arg);         \
  71 } while (0)
  72 #else
  73 #define ds_dbg(lvl, fmt, arg...) do { } while (0)
  74 #endif
  75
  76 spinlock_t pcmcia_dev_list_lock;
  77
  78 static int unbind_request(struct pcmcia_bus_socket *s);
  79
  80 /*====================================================================*/
  81
  82 /* code which was in cs.c before */
  83
  84 /* String tables for error messages */
  85
  86 typedef struct lookup_t {
  87     int key;
  88     char *msg;
  89 } lookup_t;
  90
  91 static const lookup_t error_table[] = {
  92     { CS_SUCCESS,               "Operation succeeded" },
  93     { CS_BAD_ADAPTER,           "Bad adapter" },
  94     { CS_BAD_ATTRIBUTE,         "Bad attribute", },
  95     { CS_BAD_BASE,              "Bad base address" },
  96     { CS_BAD_EDC,               "Bad EDC" },
  97     { CS_BAD_IRQ,               "Bad IRQ" },
  98     { CS_BAD_OFFSET,            "Bad offset" },
  99     { CS_BAD_PAGE,              "Bad page number" },
 100     { CS_READ_FAILURE,          "Read failure" },
 101     { CS_BAD_SIZE,              "Bad size" },
 102     { CS_BAD_SOCKET,            "Bad socket" },
 103     { CS_BAD_TYPE,              "Bad type" },
 104     { CS_BAD_VCC,               "Bad Vcc" },
 105     { CS_BAD_VPP,               "Bad Vpp" },
 106     { CS_BAD_WINDOW,            "Bad window" },
 107     { CS_WRITE_FAILURE,         "Write failure" },
 108     { CS_NO_CARD,               "No card present" },
 109     { CS_UNSUPPORTED_FUNCTION,  "Usupported function" },
 110     { CS_UNSUPPORTED_MODE,      "Unsupported mode" },
 111     { CS_BAD_SPEED,             "Bad speed" },
 112     { CS_BUSY,                  "Resource busy" },
 113     { CS_GENERAL_FAILURE,       "General failure" },
 114     { CS_WRITE_PROTECTED,       "Write protected" },
 115     { CS_BAD_ARG_LENGTH,        "Bad argument length" },
 116     { CS_BAD_ARGS,              "Bad arguments" },
 117     { CS_CONFIGURATION_LOCKED,  "Configuration locked" },
 118     { CS_IN_USE,                "Resource in use" },
 119     { CS_NO_MORE_ITEMS,         "No more items" },
 120     { CS_OUT_OF_RESOURCE,       "Out of resource" },
 121     { CS_BAD_HANDLE,            "Bad handle" },
 122     { CS_BAD_TUPLE,             "Bad CIS tuple" }
 123 };
 124
 125
 126 static const lookup_t service_table[] = {
 127     { AccessConfigurationRegister,      "AccessConfigurationRegister" },
 128     { AddSocketServices,                "AddSocketServices" },
 129     { AdjustResourceInfo,               "AdjustResourceInfo" },
 130     { CheckEraseQueue,                  "CheckEraseQueue" },
 131     { CloseMemory,                      "CloseMemory" },
 132     { DeregisterClient,                 "DeregisterClient" },
 133     { DeregisterEraseQueue,             "DeregisterEraseQueue" },
 134     { GetCardServicesInfo,              "GetCardServicesInfo" },
 135     { GetClientInfo,                    "GetClientInfo" },
 136     { GetConfigurationInfo,             "GetConfigurationInfo" },
 137     { GetEventMask,                     "GetEventMask" },
 138     { GetFirstClient,                   "GetFirstClient" },
 139     { GetFirstRegion,                   "GetFirstRegion" },
 140     { GetFirstTuple,                    "GetFirstTuple" },
 141     { GetNextClient,                    "GetNextClient" },
 142     { GetNextRegion,                    "GetNextRegion" },
 143     { GetNextTuple,                     "GetNextTuple" },
 144     { GetStatus,                        "GetStatus" },
 145     { GetTupleData,                     "GetTupleData" },
 146     { MapMemPage,                       "MapMemPage" },
 147     { ModifyConfiguration,              "ModifyConfiguration" },
 148     { ModifyWindow,                     "ModifyWindow" },
 149     { OpenMemory,                       "OpenMemory" },
 150     { ParseTuple,                       "ParseTuple" },
 151     { ReadMemory,                       "ReadMemory" },
 152     { RegisterClient,                   "RegisterClient" },
 153     { RegisterEraseQueue,               "RegisterEraseQueue" },
 154     { RegisterMTD,                      "RegisterMTD" },
 155     { ReleaseConfiguration,             "ReleaseConfiguration" },
 156     { ReleaseIO,                        "ReleaseIO" },
 157     { ReleaseIRQ,                       "ReleaseIRQ" },
 158     { ReleaseWindow,                    "ReleaseWindow" },
 159     { RequestConfiguration,             "RequestConfiguration" },
 160     { RequestIO,                        "RequestIO" },
 161     { RequestIRQ,                       "RequestIRQ" },
 162     { RequestSocketMask,                "RequestSocketMask" },
 163     { RequestWindow,                    "RequestWindow" },
 164     { ResetCard,                        "ResetCard" },
 165     { SetEventMask,                     "SetEventMask" },
 166     { ValidateCIS,                      "ValidateCIS" },
 167     { WriteMemory,                      "WriteMemory" },
 168     { BindDevice,                       "BindDevice" },
 169     { BindMTD,                          "BindMTD" },
 170     { ReportError,                      "ReportError" },
 171     { SuspendCard,                      "SuspendCard" },
 172     { ResumeCard,                       "ResumeCard" },
 173     { EjectCard,                        "EjectCard" },
 174     { InsertCard,                       "InsertCard" },
 175     { ReplaceCIS,                       "ReplaceCIS" }
 176 };
 177
 178
 179 static int pcmcia_report_error(client_handle_t handle, error_info_t *err)
 180 {
 181         int i;
 182         char *serv;
 183
 184         if (CHECK_HANDLE(handle))
 185                 printk(KERN_NOTICE);
 186         else {
 187                 struct pcmcia_device *p_dev = handle_to_pdev(handle);
 188                 printk(KERN_NOTICE "%s: ", p_dev->dev.bus_id);
 189         }
 190
 191         for (i = 0; i < ARRAY_SIZE(service_table); i++)
 192                 if (service_table[i].key == err->func)
 193                         break;
 194         if (i < ARRAY_SIZE(service_table))
 195                 serv = service_table[i].msg;
 196         else
 197                 serv = "Unknown service number";
 198
 199         for (i = 0; i < ARRAY_SIZE(error_table); i++)
 200                 if (error_table[i].key == err->retcode)
 201                         break;
 202         if (i < ARRAY_SIZE(error_table))
 203                 printk("%s: %s\n", serv, error_table[i].msg);
 204         else
 205                 printk("%s: Unknown error code %#x\n", serv, err->retcode);
 206
 207         return CS_SUCCESS;
 208 } /* report_error */
 209
 210 /* end of code which was in cs.c before */
 211
 212 /*======================================================================*/
 213
 214 void cs_error(client_handle_t handle, int func, int ret)
 215 {
 216         error_info_t err = { func, ret };
 217         pcmcia_report_error(handle, &err);
 218 }
 219 EXPORT_SYMBOL(cs_error);
 220
 221
 222 static void pcmcia_check_driver(struct pcmcia_driver *p_drv)
 223 {
 224         struct pcmcia_device_id *did = p_drv->id_table;
 225         unsigned int i;
 226         u32 hash;
 227
 228         while (did && did->match_flags) {
 229                 for (i=0; i<4; i++) {
 230                         if (!did->prod_id[i])
 231                                 continue;
 232
 233                         hash = crc32(0, did->prod_id[i], strlen(did->prod_id[i]));
 234                         if (hash == did->prod_id_hash[i])
 235                                 continue;
 236
 237                         printk(KERN_DEBUG "pcmcia: %s: invalid hash for "
 238                                "product string \"%s\": is 0x%x, should "
 239                                "be 0x%x\n", p_drv->drv.name, did->prod_id[i],
 240                                did->prod_id_hash[i], hash);
 241                         printk(KERN_DEBUG "pcmcia: see "
 242                                 "Documentation/pcmcia/devicetable.txt for "
 243                                 "details\n");
 244                 }
 245                 did++;
 246         }
 247
 248         return;
 249 }
 250
 251
 252 #ifdef CONFIG_PCMCIA_LOAD_CIS
 253
 254 /**
 255  * pcmcia_load_firmware - load CIS from userspace if device-provided is broken
 256  * @dev - the pcmcia device which needs a CIS override
 257  * @filename - requested filename in /lib/firmware/cis/
 258  *
 259  * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if
 260  * the one provided by the card is broken. The firmware files reside in
 261  * /lib/firmware/cis/ in userspace.
 262  */
 263 static int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
 264 {
 265         struct pcmcia_socket *s = dev->socket;
 266         const struct firmware *fw;
 267         char path[20];
 268         int ret=-ENOMEM;
 269         cisdump_t *cis;
 270
 271         if (!filename)
 272                 return -EINVAL;
 273
 274         ds_dbg(1, "trying to load firmware %s\n", filename);
 275
 276         if (strlen(filename) > 14)
 277                 return -EINVAL;
 278
 279         snprintf(path, 20, "%s", filename);
 280
 281         if (request_firmware(&fw, path, &dev->dev) == 0) {
 282                 if (fw->size >= CISTPL_MAX_CIS_SIZE)
 283                         goto release;
 284
 285                 cis = kmalloc(sizeof(cisdump_t), GFP_KERNEL);
 286                 if (!cis)
 287                         goto release;
 288
 289                 memset(cis, 0, sizeof(cisdump_t));
 290
 291                 cis->Length = fw->size + 1;
 292                 memcpy(cis->Data, fw->data, fw->size);
 293
 294                 if (!pcmcia_replace_cis(s, cis))
 295                         ret = 0;
 296         }
 297  release:
 298         release_firmware(fw);
 299
 300         return (ret);
 301 }
 302
 303 #else /* !CONFIG_PCMCIA_LOAD_CIS */
 304
 305 static inline int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
 306 {
 307         return -ENODEV;
 308 }
 309
 310 #endif
 311
 312
 313 /*======================================================================*/
 314
 315
 316 void pcmcia_release_bus_socket(struct kref *refcount)
 317 {
 318         struct pcmcia_bus_socket *s = container_of(refcount, struct pcmcia_bus_socket, refcount);
 319         pcmcia_put_socket(s->parent);
 320         kfree(s);
 321 }
 322
 323 void pcmcia_put_bus_socket(struct pcmcia_bus_socket *s)
 324 {
 325         kref_put(&s->refcount, pcmcia_release_bus_socket);
 326 }
 327
 328 struct pcmcia_bus_socket *pcmcia_get_bus_socket(struct pcmcia_bus_socket *s)
 329 {
 330         kref_get(&s->refcount);
 331         return (s);
 332 }
 333
 334 /**
 335  * pcmcia_register_driver - register a PCMCIA driver with the bus core
 336  *
 337  * Registers a PCMCIA driver with the PCMCIA bus core.
 338  */
 339 static int pcmcia_device_probe(struct device *dev);
 340 static int pcmcia_device_remove(struct device * dev);
 341
 342 int pcmcia_register_driver(struct pcmcia_driver *driver)
 343 {
 344         if (!driver)
 345                 return -EINVAL;
 346
 347         pcmcia_check_driver(driver);
 348
 349         /* initialize common fields */
 350         driver->drv.bus = &pcmcia_bus_type;
 351         driver->drv.owner = driver->owner;
 352         driver->drv.probe = pcmcia_device_probe;
 353         driver->drv.remove = pcmcia_device_remove;
 354
 355         return driver_register(&driver->drv);
 356 }
 357 EXPORT_SYMBOL(pcmcia_register_driver);
 358
 359 /**
 360  * pcmcia_unregister_driver - unregister a PCMCIA driver with the bus core
 361  */
 362 void pcmcia_unregister_driver(struct pcmcia_driver *driver)
 363 {
 364         driver_unregister(&driver->drv);
 365 }
 366 EXPORT_SYMBOL(pcmcia_unregister_driver);
 367
 368
 369 /* pcmcia_device handling */
 370
 371 struct pcmcia_device * pcmcia_get_dev(struct pcmcia_device *p_dev)
 372 {
 373         struct device *tmp_dev;
 374         tmp_dev = get_device(&p_dev->dev);
 375         if (!tmp_dev)
 376                 return NULL;
 377         return to_pcmcia_dev(tmp_dev);
 378 }
 379
 380 void pcmcia_put_dev(struct pcmcia_device *p_dev)
 381 {
 382         if (p_dev)
 383                 put_device(&p_dev->dev);
 384 }
 385
 386 static void pcmcia_release_dev(struct device *dev)
 387 {
 388         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 389         ds_dbg(1, "releasing dev %p\n", p_dev);
 390         pcmcia_put_bus_socket(p_dev->socket->pcmcia);
 391         kfree(p_dev);
 392 }
 393
 394
 395 static int pcmcia_device_probe(struct device * dev)
 396 {
 397         struct pcmcia_device *p_dev;
 398         struct pcmcia_driver *p_drv;
 399         int ret = 0;
 400
 401         dev = get_device(dev);
 402         if (!dev)
 403                 return -ENODEV;
 404
 405         p_dev = to_pcmcia_dev(dev);
 406         p_drv = to_pcmcia_drv(dev->driver);
 407
 408         if (!try_module_get(p_drv->owner)) {
 409                 ret = -EINVAL;
 410                 goto put_dev;
 411         }
 412
 413         if (p_drv->attach) {
 414                 p_dev->instance = p_drv->attach();
 415                 if ((!p_dev->instance) || (p_dev->client.state & CLIENT_UNBOUND)) {
 416                         printk(KERN_NOTICE "ds: unable to create instance "
 417                                "of '%s'!\n", p_drv->drv.name);
 418                         ret = -EINVAL;
 419                 }
 420         }
 421
 422         if (ret)
 423                 module_put(p_drv->owner);
 424  put_dev:
 425         if ((ret) || !(p_drv->attach))
 426                 put_device(dev);
 427         return (ret);
 428 }
 429
 430
 431 static int pcmcia_device_remove(struct device * dev)
 432 {
 433         struct pcmcia_device *p_dev;
 434         struct pcmcia_driver *p_drv;
 435
 436         /* detach the "instance" */
 437         p_dev = to_pcmcia_dev(dev);
 438         p_drv = to_pcmcia_drv(dev->driver);
 439
 440         if (p_drv) {
 441                 if ((p_drv->detach) && (p_dev->instance)) {
 442                         p_drv->detach(p_dev->instance);
 443                         /* from pcmcia_probe_device */
 444                         put_device(&p_dev->dev);
 445                 }
 446                 module_put(p_drv->owner);
 447         }
 448
 449         return 0;
 450 }
 451
 452
 453
 454 /*
 455  * pcmcia_device_query -- determine information about a pcmcia device
 456  */
 457 static int pcmcia_device_query(struct pcmcia_device *p_dev)
 458 {
 459         cistpl_manfid_t manf_id;
 460         cistpl_funcid_t func_id;
 461         cistpl_vers_1_t vers1;
 462         unsigned int i;
 463
 464         if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 465                                CISTPL_MANFID, &manf_id)) {
 466                 p_dev->manf_id = manf_id.manf;
 467                 p_dev->card_id = manf_id.card;
 468                 p_dev->has_manf_id = 1;
 469                 p_dev->has_card_id = 1;
 470         }
 471
 472         if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 473                                CISTPL_FUNCID, &func_id)) {
 474                 p_dev->func_id = func_id.func;
 475                 p_dev->has_func_id = 1;
 476         } else {
 477                 /* rule of thumb: cards with no FUNCID, but with
 478                  * common memory device geometry information, are
 479                  * probably memory cards (from pcmcia-cs) */
 480                 cistpl_device_geo_t devgeo;
 481                 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 482                                       CISTPL_DEVICE_GEO, &devgeo)) {
 483                         ds_dbg(0, "mem device geometry probably means "
 484                                "FUNCID_MEMORY\n");
 485                         p_dev->func_id = CISTPL_FUNCID_MEMORY;
 486                         p_dev->has_func_id = 1;
 487                 }
 488         }
 489
 490         if (!pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_VERS_1,
 491                                &vers1)) {
 492                 for (i=0; i < vers1.ns; i++) {
 493                         char *tmp;
 494                         unsigned int length;
 495
 496                         tmp = vers1.str + vers1.ofs[i];
 497
 498                         length = strlen(tmp) + 1;
 499                         if ((length < 3) || (length > 255))
 500                                 continue;
 501
 502                         p_dev->prod_id[i] = kmalloc(sizeof(char) * length,
 503                                                     GFP_KERNEL);
 504                         if (!p_dev->prod_id[i])
 505                                 continue;
 506
 507                         p_dev->prod_id[i] = strncpy(p_dev->prod_id[i],
 508                                                     tmp, length);
 509                 }
 510         }
 511
 512         return 0;
 513 }
 514
 515
 516 /* device_add_lock is needed to avoid double registration by cardmgr and kernel.
 517  * Serializes pcmcia_device_add; will most likely be removed in future.
 518  *
 519  * While it has the caveat that adding new PCMCIA devices inside(!) device_register()
 520  * won't work, this doesn't matter much at the moment: the driver core doesn't
 521  * support it either.
 522  */
 523 static DECLARE_MUTEX(device_add_lock);
 524
 525 struct pcmcia_device * pcmcia_device_add(struct pcmcia_bus_socket *s, unsigned int function)
 526 {
 527         struct pcmcia_device *p_dev;
 528         unsigned long flags;
 529
 530         s = pcmcia_get_bus_socket(s);
 531         if (!s)
 532                 return NULL;
 533
 534         down(&device_add_lock);
 535
 536         /* max of 2 devices per card */
 537         if (s->device_count == 2)
 538                 goto err_put;
 539
 540         p_dev = kmalloc(sizeof(struct pcmcia_device), GFP_KERNEL);
 541         if (!p_dev)
 542                 goto err_put;
 543         memset(p_dev, 0, sizeof(struct pcmcia_device));
 544
 545         p_dev->socket = s->parent;
 546         p_dev->device_no = (s->device_count++);
 547         p_dev->func   = function;
 548
 549         p_dev->dev.bus = &pcmcia_bus_type;
 550         p_dev->dev.parent = s->parent->dev.dev;
 551         p_dev->dev.release = pcmcia_release_dev;
 552         sprintf (p_dev->dev.bus_id, "%d.%d", p_dev->socket->sock, p_dev->device_no);
 553
 554         /* compat */
 555         p_dev->client.client_magic = CLIENT_MAGIC;
 556         p_dev->client.Socket = s->parent;
 557         p_dev->client.Function = function;
 558         p_dev->client.state = CLIENT_UNBOUND;
 559
 560         /* Add to the list in pcmcia_bus_socket */
 561         spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 562         list_add_tail(&p_dev->socket_device_list, &s->devices_list);
 563         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 564
 565         pcmcia_device_query(p_dev);
 566
 567         if (device_register(&p_dev->dev)) {
 568                 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 569                 list_del(&p_dev->socket_device_list);
 570                 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 571
 572                 goto err_free;
 573        }
 574
 575         up(&device_add_lock);
 576
 577         return p_dev;
 578
 579  err_free:
 580         kfree(p_dev);
 581         s->device_count--;
 582  err_put:
 583         up(&device_add_lock);
 584         pcmcia_put_bus_socket(s);
 585
 586         return NULL;
 587 }
 588
 589
 590 static int pcmcia_card_add(struct pcmcia_socket *s)
 591 {
 592         cisinfo_t cisinfo;
 593         cistpl_longlink_mfc_t mfc;
 594         unsigned int no_funcs, i;
 595         int ret = 0;
 596
 597         if (!(s->resource_setup_done))
 598                 return -EAGAIN; /* try again, but later... */
 599
 600         pcmcia_validate_mem(s);
 601         ret = pccard_validate_cis(s, BIND_FN_ALL, &cisinfo);
 602         if (ret || !cisinfo.Chains) {
 603                 ds_dbg(0, "invalid CIS or invalid resources\n");
 604                 return -ENODEV;
 605         }
 606
 607         if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
 608                 no_funcs = mfc.nfn;
 609         else
 610                 no_funcs = 1;
 611
 612         /* this doesn't handle multifunction devices on one pcmcia function
 613          * yet. */
 614         for (i=0; i < no_funcs; i++)
 615                 pcmcia_device_add(s->pcmcia, i);
 616
 617         return (ret);
 618 }
 619
 620
 621 static void pcmcia_delayed_add_pseudo_device(void *data)
 622 {
 623         struct pcmcia_bus_socket *s = data;
 624         pcmcia_device_add(s, 0);
 625         s->device_add_pending = 0;
 626 }
 627
 628 static inline void pcmcia_add_pseudo_device(struct pcmcia_bus_socket *s)
 629 {
 630         if (!s->device_add_pending) {
 631                 schedule_work(&s->device_add);
 632                 s->device_add_pending = 1;
 633         }
 634         return;
 635 }
 636
 637 static int pcmcia_requery(struct device *dev, void * _data)
 638 {
 639         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 640         if (!p_dev->dev.driver)
 641                 pcmcia_device_query(p_dev);
 642
 643         return 0;
 644 }
 645
 646 static void pcmcia_bus_rescan(struct pcmcia_socket *skt)
 647 {
 648         int no_devices=0;
 649         unsigned long flags;
 650
 651         /* must be called with skt_sem held */
 652         spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 653         if (list_empty(&skt->pcmcia->devices_list))
 654                 no_devices=1;
 655         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 656
 657         /* if no devices were added for this socket yet because of
 658          * missing resource information or other trouble, we need to
 659          * do this now. */
 660         if (no_devices) {
 661                 int ret = pcmcia_card_add(skt);
 662                 if (ret)
 663                         return;
 664         }
 665
 666         /* some device information might have changed because of a CIS
 667          * update or because we can finally read it correctly... so
 668          * determine it again, overwriting old values if necessary. */
 669         bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery);
 670
 671         /* we re-scan all devices, not just the ones connected to this
 672          * socket. This does not matter, though. */
 673         bus_rescan_devices(&pcmcia_bus_type);
 674 }
 675
 676 static inline int pcmcia_devmatch(struct pcmcia_device *dev,
 677                                   struct pcmcia_device_id *did)
 678 {
 679         if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
 680                 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
 681                         return 0;
 682         }
 683
 684         if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
 685                 if ((!dev->has_card_id) || (dev->card_id != did->card_id))
 686                         return 0;
 687         }
 688
 689         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
 690                 if (dev->func != did->function)
 691                         return 0;
 692         }
 693
 694         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
 695                 if (!dev->prod_id[0])
 696                         return 0;
 697                 if (strcmp(did->prod_id[0], dev->prod_id[0]))
 698                         return 0;
 699         }
 700
 701         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
 702                 if (!dev->prod_id[1])
 703                         return 0;
 704                 if (strcmp(did->prod_id[1], dev->prod_id[1]))
 705                         return 0;
 706         }
 707
 708         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
 709                 if (!dev->prod_id[2])
 710                         return 0;
 711                 if (strcmp(did->prod_id[2], dev->prod_id[2]))
 712                         return 0;
 713         }
 714
 715         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
 716                 if (!dev->prod_id[3])
 717                         return 0;
 718                 if (strcmp(did->prod_id[3], dev->prod_id[3]))
 719                         return 0;
 720         }
 721
 722         if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
 723                 /* handle pseudo multifunction devices:
 724                  * there are at most two pseudo multifunction devices.
 725                  * if we're matching against the first, schedule a
 726                  * call which will then check whether there are two
 727                  * pseudo devices, and if not, add the second one.
 728                  */
 729                 if (dev->device_no == 0)
 730                         pcmcia_add_pseudo_device(dev->socket->pcmcia);
 731
 732                 if (dev->device_no != did->device_no)
 733                         return 0;
 734         }
 735
 736         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
 737                 if ((!dev->has_func_id) || (dev->func_id != did->func_id))
 738                         return 0;
 739
 740                 /* if this is a pseudo-multi-function device,
 741                  * we need explicit matches */
 742                 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO)
 743                         return 0;
 744                 if (dev->device_no)
 745                         return 0;
 746
 747                 /* also, FUNC_ID matching needs to be activated by userspace
 748                  * after it has re-checked that there is no possible module
 749                  * with a prod_id/manf_id/card_id match.
 750                  */
 751                 if (!dev->allow_func_id_match)
 752                         return 0;
 753         }
 754
 755         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
 756                 if (!dev->socket->fake_cis)
 757                         pcmcia_load_firmware(dev, did->cisfile);
 758
 759                 if (!dev->socket->fake_cis)
 760                         return 0;
 761         }
 762
 763         if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
 764                 int i;
 765                 for (i=0; i<4; i++)
 766                         if (dev->prod_id[i])
 767                                 return 0;
 768                 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
 769                         return 0;
 770         }
 771
 772         dev->dev.driver_data = (void *) did;
 773
 774         return 1;
 775 }
 776
 777
 778 static int pcmcia_bus_match(struct device * dev, struct device_driver * drv) {
 779         struct pcmcia_device * p_dev = to_pcmcia_dev(dev);
 780         struct pcmcia_driver * p_drv = to_pcmcia_drv(drv);
 781         struct pcmcia_device_id *did = p_drv->id_table;
 782
 783         /* matching by cardmgr */
 784         if (p_dev->cardmgr == p_drv)
 785                 return 1;
 786
 787         while (did && did->match_flags) {
 788                 if (pcmcia_devmatch(p_dev, did))
 789                         return 1;
 790                 did++;
 791         }
 792
 793         return 0;
 794 }
 795
 796 #ifdef CONFIG_HOTPLUG
 797
 798 static int pcmcia_bus_hotplug(struct device *dev, char **envp, int num_envp,
 799                               char *buffer, int buffer_size)
 800 {
 801         struct pcmcia_device *p_dev;
 802         int i, length = 0;
 803         u32 hash[4] = { 0, 0, 0, 0};
 804
 805         if (!dev)
 806                 return -ENODEV;
 807
 808         p_dev = to_pcmcia_dev(dev);
 809
 810         /* calculate hashes */
 811         for (i=0; i<4; i++) {
 812                 if (!p_dev->prod_id[i])
 813                         continue;
 814                 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
 815         }
 816
 817         i = 0;
 818
 819         if (add_hotplug_env_var(envp, num_envp, &i,
 820                                 buffer, buffer_size, &length,
 821                                 "SOCKET_NO=%u",
 822                                 p_dev->socket->sock))
 823                 return -ENOMEM;
 824
 825         if (add_hotplug_env_var(envp, num_envp, &i,
 826                                 buffer, buffer_size, &length,
 827                                 "DEVICE_NO=%02X",
 828                                 p_dev->device_no))
 829                 return -ENOMEM;
 830
 831         if (add_hotplug_env_var(envp, num_envp, &i,
 832                                 buffer, buffer_size, &length,
 833                                 "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
 834                                 "pa%08Xpb%08Xpc%08Xpd%08X",
 835                                 p_dev->has_manf_id ? p_dev->manf_id : 0,
 836                                 p_dev->has_card_id ? p_dev->card_id : 0,
 837                                 p_dev->has_func_id ? p_dev->func_id : 0,
 838                                 p_dev->func,
 839                                 p_dev->device_no,
 840                                 hash[0],
 841                                 hash[1],
 842                                 hash[2],
 843                                 hash[3]))
 844                 return -ENOMEM;
 845
 846         envp[i] = NULL;
 847
 848         return 0;
 849 }
 850
 851 #else
 852
 853 static int pcmcia_bus_hotplug(struct device *dev, char **envp, int num_envp,
 854                               char *buffer, int buffer_size)
 855 {
 856         return -ENODEV;
 857 }
 858
 859 #endif
 860
 861 /************************ per-device sysfs output ***************************/
 862
 863 #define pcmcia_device_attr(field, test, format)                         \
 864 static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf)              \
 865 {                                                                       \
 866         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);               \
 867         return p_dev->test ? sprintf (buf, format, p_dev->field) : -ENODEV; \
 868 }
 869
 870 #define pcmcia_device_stringattr(name, field)                                   \
 871 static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf)               \
 872 {                                                                       \
 873         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);               \
 874         return p_dev->field ? sprintf (buf, "%s\n", p_dev->field) : -ENODEV; \
 875 }
 876
 877 pcmcia_device_attr(func, socket, "0x%02x\n");
 878 pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
 879 pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
 880 pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
 881 pcmcia_device_stringattr(prod_id1, prod_id[0]);
 882 pcmcia_device_stringattr(prod_id2, prod_id[1]);
 883 pcmcia_device_stringattr(prod_id3, prod_id[2]);
 884 pcmcia_device_stringattr(prod_id4, prod_id[3]);
 885
 886
 887 static ssize_t pcmcia_store_allow_func_id_match (struct device * dev, struct device_attribute *attr,
 888                                                  const char * buf, size_t count)
 889 {
 890         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 891         if (!count)
 892                 return -EINVAL;
 893
 894         down(&p_dev->socket->skt_sem);
 895         p_dev->allow_func_id_match = 1;
 896         up(&p_dev->socket->skt_sem);
 897
 898         bus_rescan_devices(&pcmcia_bus_type);
 899
 900         return count;
 901 }
 902
 903 static struct device_attribute pcmcia_dev_attrs[] = {
 904         __ATTR(function, 0444, func_show, NULL),
 905         __ATTR_RO(func_id),
 906         __ATTR_RO(manf_id),
 907         __ATTR_RO(card_id),
 908         __ATTR_RO(prod_id1),
 909         __ATTR_RO(prod_id2),
 910         __ATTR_RO(prod_id3),
 911         __ATTR_RO(prod_id4),
 912         __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match),
 913         __ATTR_NULL,
 914 };
 915
 916
 917 /*======================================================================
 918
 919     The card status event handler.
 920
 921 ======================================================================*/
 922
 923 struct send_event_data {
 924         struct pcmcia_socket *skt;
 925         event_t event;
 926         int priority;
 927 };
 928
 929 static int send_event_callback(struct device *dev, void * _data)
 930 {
 931         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 932         struct send_event_data *data = _data;
 933
 934         /* we get called for all sockets, but may only pass the event
 935          * for drivers _on the affected socket_ */
 936         if (p_dev->socket != data->skt)
 937                 return 0;
 938
 939         if (p_dev->client.state & (CLIENT_UNBOUND|CLIENT_STALE))
 940                 return 0;
 941
 942         if (p_dev->client.EventMask & data->event)
 943                 return EVENT(&p_dev->client, data->event, data->priority);
 944
 945         return 0;
 946 }
 947
 948 static int send_event(struct pcmcia_socket *s, event_t event, int priority)
 949 {
 950         int ret = 0;
 951         struct send_event_data private;
 952         struct pcmcia_bus_socket *skt = pcmcia_get_bus_socket(s->pcmcia);
 953
 954         if (!skt)
 955                 return 0;
 956
 957         private.skt = s;
 958         private.event = event;
 959         private.priority = priority;
 960
 961         ret = bus_for_each_dev(&pcmcia_bus_type, NULL, &private, send_event_callback);
 962
 963         pcmcia_put_bus_socket(skt);
 964         return ret;
 965 } /* send_event */
 966
 967
 968 /* Normally, the event is passed to individual drivers after
 969  * informing userspace. Only for CS_EVENT_CARD_REMOVAL this
 970  * is inversed to maintain historic compatibility.
 971  */
 972
 973 static int ds_event(struct pcmcia_socket *skt, event_t event, int priority)
 974 {
 975         struct pcmcia_bus_socket *s = skt->pcmcia;
 976         int ret = 0;
 977
 978         ds_dbg(1, "ds_event(0x%06x, %d, 0x%p)\n",
 979                event, priority, s);
 980
 981         switch (event) {
 982
 983         case CS_EVENT_CARD_REMOVAL:
 984                 s->state &= ~DS_SOCKET_PRESENT;
 985                 send_event(skt, event, priority);
 986                 unbind_request(s);
 987                 handle_event(s, event);
 988                 break;
 989
 990         case CS_EVENT_CARD_INSERTION:
 991                 s->state |= DS_SOCKET_PRESENT;
 992                 pcmcia_card_add(skt);
 993                 handle_event(s, event);
 994                 break;
 995
 996         case CS_EVENT_EJECTION_REQUEST:
 997                 ret = send_event(skt, event, priority);
 998                 break;
 999
1000         default:
1001                 handle_event(s, event);
1002                 send_event(skt, event, priority);
1003                 break;
1004     }
1005
1006     return 0;
1007 } /* ds_event */
1008
1009
1010
1011 int pcmcia_register_client(client_handle_t *handle, client_reg_t *req)
1012 {
1013         client_t *client = NULL;
1014         struct pcmcia_socket *s;
1015         struct pcmcia_bus_socket *skt = NULL;
1016         struct pcmcia_device *p_dev = NULL;
1017
1018         /* Look for unbound client with matching dev_info */
1019         down_read(&pcmcia_socket_list_rwsem);
1020         list_for_each_entry(s, &pcmcia_socket_list, socket_list) {
1021                 unsigned long flags;
1022
1023                 if (s->state & SOCKET_CARDBUS)
1024                         continue;
1025
1026                 skt = s->pcmcia;
1027                 if (!skt)
1028                         continue;
1029                 skt = pcmcia_get_bus_socket(skt);
1030                 if (!skt)
1031                         continue;
1032                 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
1033                 list_for_each_entry(p_dev, &skt->devices_list, socket_device_list) {
1034                         struct pcmcia_driver *p_drv;
1035                         p_dev = pcmcia_get_dev(p_dev);
1036                         if (!p_dev)
1037                                 continue;
1038                         if (!(p_dev->client.state & CLIENT_UNBOUND) ||
1039                             (!p_dev->dev.driver)) {
1040                                 pcmcia_put_dev(p_dev);
1041                                 continue;
1042                         }
1043                         p_drv = to_pcmcia_drv(p_dev->dev.driver);
1044                         if (!strncmp(p_drv->drv.name, (char *)req->dev_info, DEV_NAME_LEN)) {
1045                                 client = &p_dev->client;
1046                                 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
1047                                 goto found;
1048                         }
1049                         pcmcia_put_dev(p_dev);
1050                 }
1051                 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
1052                 pcmcia_put_bus_socket(skt);
1053         }
1054  found:
1055         up_read(&pcmcia_socket_list_rwsem);
1056         if (!p_dev || !client)
1057                 return -ENODEV;
1058
1059         pcmcia_put_bus_socket(skt); /* safe, as we already hold a reference from bind_device */
1060
1061         *handle = client;
1062         client->state &= ~CLIENT_UNBOUND;
1063         client->Socket = s;
1064         client->EventMask = req->EventMask;
1065         client->event_handler = req->event_handler;
1066         client->event_callback_args = req->event_callback_args;
1067         client->event_callback_args.client_handle = client;
1068
1069         if (s->state & SOCKET_CARDBUS)
1070                 client->state |= CLIENT_CARDBUS;
1071
1072         if ((!(s->state & SOCKET_CARDBUS)) && (s->functions == 0) &&
1073             (client->Function != BIND_FN_ALL)) {
1074                 cistpl_longlink_mfc_t mfc;
1075                 if (pccard_read_tuple(s, client->Function, CISTPL_LONGLINK_MFC, &mfc)
1076                     == CS_SUCCESS)
1077                         s->functions = mfc.nfn;
1078                 else
1079                         s->functions = 1;
1080                 s->config = kmalloc(sizeof(config_t) * s->functions,
1081                                     GFP_KERNEL);
1082                 if (!s->config)
1083                         goto out_no_resource;
1084                 memset(s->config, 0, sizeof(config_t) * s->functions);
1085         }
1086
1087         ds_dbg(1, "register_client(): client 0x%p, dev %s\n",
1088                client, p_dev->dev.bus_id);
1089         if (client->EventMask & CS_EVENT_REGISTRATION_COMPLETE)
1090                 EVENT(client, CS_EVENT_REGISTRATION_COMPLETE, CS_EVENT_PRI_LOW);
1091
1092         if ((s->state & (SOCKET_PRESENT|SOCKET_CARDBUS)) == SOCKET_PRESENT) {
1093                 if (client->EventMask & CS_EVENT_CARD_INSERTION)
1094                         EVENT(client, CS_EVENT_CARD_INSERTION, CS_EVENT_PRI_LOW);
1095         }
1096
1097         return CS_SUCCESS;
1098
1099  out_no_resource:
1100         pcmcia_put_dev(p_dev);
1101         return CS_OUT_OF_RESOURCE;
1102 } /* register_client */
1103 EXPORT_SYMBOL(pcmcia_register_client);
1104
1105
1106 /* unbind _all_ devices attached to a given pcmcia_bus_socket. The
1107  * drivers have been called with EVENT_CARD_REMOVAL before.
1108  */
1109 static int unbind_request(struct pcmcia_bus_socket *s)
1110 {
1111         struct pcmcia_device    *p_dev;
1112         unsigned long           flags;
1113
1114         ds_dbg(2, "unbind_request(%d)\n", s->parent->sock);
1115
1116         s->device_count = 0;
1117
1118         for (;;) {
1119                 /* unregister all pcmcia_devices registered with this socket*/
1120                 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
1121                 if (list_empty(&s->devices_list)) {
1122                         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
1123                         return 0;
1124                 }
1125                 p_dev = list_entry((&s->devices_list)->next, struct pcmcia_device, socket_device_list);
1126                 list_del(&p_dev->socket_device_list);
1127                 p_dev->client.state |= CLIENT_STALE;
1128                 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
1129
1130                 device_unregister(&p_dev->dev);
1131         }
1132
1133         return 0;
1134 } /* unbind_request */
1135
1136 int pcmcia_deregister_client(client_handle_t handle)
1137 {
1138         struct pcmcia_socket *s;
1139         int i;
1140         struct pcmcia_device *p_dev = handle_to_pdev(handle);
1141
1142         if (CHECK_HANDLE(handle))
1143                 return CS_BAD_HANDLE;
1144
1145         s = SOCKET(handle);
1146         ds_dbg(1, "deregister_client(%p)\n", handle);
1147
1148         if (handle->state & (CLIENT_IRQ_REQ|CLIENT_IO_REQ|CLIENT_CONFIG_LOCKED))
1149                 goto warn_out;
1150         for (i = 0; i < MAX_WIN; i++)
1151                 if (handle->state & CLIENT_WIN_REQ(i))
1152                         goto warn_out;
1153
1154         if (handle->state & CLIENT_STALE) {
1155                 handle->client_magic = 0;
1156                 handle->state &= ~CLIENT_STALE;
1157                 pcmcia_put_dev(p_dev);
1158         } else {
1159                 handle->state = CLIENT_UNBOUND;
1160                 handle->event_handler = NULL;
1161         }
1162
1163         return CS_SUCCESS;
1164  warn_out:
1165         printk(KERN_WARNING "ds: deregister_client was called too early.\n");
1166         return CS_IN_USE;
1167 } /* deregister_client */
1168 EXPORT_SYMBOL(pcmcia_deregister_client);
1169
1170 static int __devinit pcmcia_bus_add_socket(struct class_device *class_dev)
1171 {
1172         struct pcmcia_socket *socket = class_get_devdata(class_dev);
1173         struct pcmcia_bus_socket *s;
1174         int ret;
1175
1176         s = kmalloc(sizeof(struct pcmcia_bus_socket), GFP_KERNEL);
1177         if(!s)
1178                 return -ENOMEM;
1179         memset(s, 0, sizeof(struct pcmcia_bus_socket));
1180
1181         /* get reference to parent socket */
1182         s->parent = pcmcia_get_socket(socket);
1183         if (!s->parent) {
1184                 printk(KERN_ERR "PCMCIA obtaining reference to socket %p failed\n", socket);
1185                 kfree (s);
1186                 return -ENODEV;
1187         }
1188
1189         kref_init(&s->refcount);
1190
1191         /*
1192          * Ugly. But we want to wait for the socket threads to have started up.
1193          * We really should let the drivers themselves drive some of this..
1194          */
1195         msleep(250);
1196
1197 #ifdef CONFIG_PCMCIA_IOCTL
1198         init_waitqueue_head(&s->queue);
1199 #endif
1200         INIT_LIST_HEAD(&s->devices_list);
1201         INIT_WORK(&s->device_add, pcmcia_delayed_add_pseudo_device, s);
1202
1203         /* Set up hotline to Card Services */
1204         s->callback.owner = THIS_MODULE;
1205         s->callback.event = &ds_event;
1206         s->callback.requery = &pcmcia_bus_rescan;
1207         socket->pcmcia = s;
1208
1209         ret = pccard_register_pcmcia(socket, &s->callback);
1210         if (ret) {
1211                 printk(KERN_ERR "PCMCIA registration PCCard core failed for socket %p\n", socket);
1212                 pcmcia_put_bus_socket(s);
1213                 socket->pcmcia = NULL;
1214                 return (ret);
1215         }
1216
1217         return 0;
1218 }
1219
1220
1221 static void pcmcia_bus_remove_socket(struct class_device *class_dev)
1222 {
1223         struct pcmcia_socket *socket = class_get_devdata(class_dev);
1224
1225         if (!socket || !socket->pcmcia)
1226                 return;
1227
1228         pccard_register_pcmcia(socket, NULL);
1229
1230         socket->pcmcia->state |= DS_SOCKET_DEAD;
1231         pcmcia_put_bus_socket(socket->pcmcia);
1232         socket->pcmcia = NULL;
1233
1234         return;
1235 }
1236
1237
1238 /* the pcmcia_bus_interface is used to handle pcmcia socket devices */
1239 static struct class_interface pcmcia_bus_interface = {
1240         .class = &pcmcia_socket_class,
1241         .add = &pcmcia_bus_add_socket,
1242         .remove = &pcmcia_bus_remove_socket,
1243 };
1244
1245
1246 struct bus_type pcmcia_bus_type = {
1247         .name = "pcmcia",
1248         .hotplug = pcmcia_bus_hotplug,
1249         .match = pcmcia_bus_match,
1250         .dev_attrs = pcmcia_dev_attrs,
1251 };
1252
1253
1254 static int __init init_pcmcia_bus(void)
1255 {
1256         spin_lock_init(&pcmcia_dev_list_lock);
1257
1258         bus_register(&pcmcia_bus_type);
1259         class_interface_register(&pcmcia_bus_interface);
1260
1261         pcmcia_setup_ioctl();
1262
1263         return 0;
1264 }
1265 fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that
1266                                * pcmcia_socket_class is already registered */
1267
1268
1269 static void __exit exit_pcmcia_bus(void)
1270 {
1271         pcmcia_cleanup_ioctl();
1272
1273         class_interface_unregister(&pcmcia_bus_interface);
1274
1275         bus_unregister(&pcmcia_bus_type);
1276 }
1277 module_exit(exit_pcmcia_bus);
1278
1279
1280 MODULE_ALIAS("ds");