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 - 2005      Dominik Brodowski
  14  */
  15
  16 #include <linux/config.h>
  17 #include <linux/kernel.h>
  18 #include <linux/module.h>
  19 #include <linux/init.h>
  20 #include <linux/errno.h>
  21 #include <linux/list.h>
  22 #include <linux/delay.h>
  23 #include <linux/workqueue.h>
  24 #include <linux/crc32.h>
  25 #include <linux/firmware.h>
  26
  27 #define IN_CARD_SERVICES
  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 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 #else
  55 #define ds_dbg(lvl, fmt, arg...) do { } while (0)
  56 #endif
  57
  58 spinlock_t pcmcia_dev_list_lock;
  59
  60 static int unbind_request(struct pcmcia_socket *s);
  61
  62 /*====================================================================*/
  63
  64 /* code which was in cs.c before */
  65
  66 /* String tables for error messages */
  67
  68 typedef struct lookup_t {
  69     int key;
  70     char *msg;
  71 } lookup_t;
  72
  73 static const lookup_t error_table[] = {
  74     { CS_SUCCESS,               "Operation succeeded" },
  75     { CS_BAD_ADAPTER,           "Bad adapter" },
  76     { CS_BAD_ATTRIBUTE,         "Bad attribute", },
  77     { CS_BAD_BASE,              "Bad base address" },
  78     { CS_BAD_EDC,               "Bad EDC" },
  79     { CS_BAD_IRQ,               "Bad IRQ" },
  80     { CS_BAD_OFFSET,            "Bad offset" },
  81     { CS_BAD_PAGE,              "Bad page number" },
  82     { CS_READ_FAILURE,          "Read failure" },
  83     { CS_BAD_SIZE,              "Bad size" },
  84     { CS_BAD_SOCKET,            "Bad socket" },
  85     { CS_BAD_TYPE,              "Bad type" },
  86     { CS_BAD_VCC,               "Bad Vcc" },
  87     { CS_BAD_VPP,               "Bad Vpp" },
  88     { CS_BAD_WINDOW,            "Bad window" },
  89     { CS_WRITE_FAILURE,         "Write failure" },
  90     { CS_NO_CARD,               "No card present" },
  91     { CS_UNSUPPORTED_FUNCTION,  "Usupported function" },
  92     { CS_UNSUPPORTED_MODE,      "Unsupported mode" },
  93     { CS_BAD_SPEED,             "Bad speed" },
  94     { CS_BUSY,                  "Resource busy" },
  95     { CS_GENERAL_FAILURE,       "General failure" },
  96     { CS_WRITE_PROTECTED,       "Write protected" },
  97     { CS_BAD_ARG_LENGTH,        "Bad argument length" },
  98     { CS_BAD_ARGS,              "Bad arguments" },
  99     { CS_CONFIGURATION_LOCKED,  "Configuration locked" },
 100     { CS_IN_USE,                "Resource in use" },
 101     { CS_NO_MORE_ITEMS,         "No more items" },
 102     { CS_OUT_OF_RESOURCE,       "Out of resource" },
 103     { CS_BAD_HANDLE,            "Bad handle" },
 104     { CS_BAD_TUPLE,             "Bad CIS tuple" }
 105 };
 106
 107
 108 static const lookup_t service_table[] = {
 109     { AccessConfigurationRegister,      "AccessConfigurationRegister" },
 110     { AddSocketServices,                "AddSocketServices" },
 111     { AdjustResourceInfo,               "AdjustResourceInfo" },
 112     { CheckEraseQueue,                  "CheckEraseQueue" },
 113     { CloseMemory,                      "CloseMemory" },
 114     { DeregisterClient,                 "DeregisterClient" },
 115     { DeregisterEraseQueue,             "DeregisterEraseQueue" },
 116     { GetCardServicesInfo,              "GetCardServicesInfo" },
 117     { GetClientInfo,                    "GetClientInfo" },
 118     { GetConfigurationInfo,             "GetConfigurationInfo" },
 119     { GetEventMask,                     "GetEventMask" },
 120     { GetFirstClient,                   "GetFirstClient" },
 121     { GetFirstRegion,                   "GetFirstRegion" },
 122     { GetFirstTuple,                    "GetFirstTuple" },
 123     { GetNextClient,                    "GetNextClient" },
 124     { GetNextRegion,                    "GetNextRegion" },
 125     { GetNextTuple,                     "GetNextTuple" },
 126     { GetStatus,                        "GetStatus" },
 127     { GetTupleData,                     "GetTupleData" },
 128     { MapMemPage,                       "MapMemPage" },
 129     { ModifyConfiguration,              "ModifyConfiguration" },
 130     { ModifyWindow,                     "ModifyWindow" },
 131     { OpenMemory,                       "OpenMemory" },
 132     { ParseTuple,                       "ParseTuple" },
 133     { ReadMemory,                       "ReadMemory" },
 134     { RegisterClient,                   "RegisterClient" },
 135     { RegisterEraseQueue,               "RegisterEraseQueue" },
 136     { RegisterMTD,                      "RegisterMTD" },
 137     { ReleaseConfiguration,             "ReleaseConfiguration" },
 138     { ReleaseIO,                        "ReleaseIO" },
 139     { ReleaseIRQ,                       "ReleaseIRQ" },
 140     { ReleaseWindow,                    "ReleaseWindow" },
 141     { RequestConfiguration,             "RequestConfiguration" },
 142     { RequestIO,                        "RequestIO" },
 143     { RequestIRQ,                       "RequestIRQ" },
 144     { RequestSocketMask,                "RequestSocketMask" },
 145     { RequestWindow,                    "RequestWindow" },
 146     { ResetCard,                        "ResetCard" },
 147     { SetEventMask,                     "SetEventMask" },
 148     { ValidateCIS,                      "ValidateCIS" },
 149     { WriteMemory,                      "WriteMemory" },
 150     { BindDevice,                       "BindDevice" },
 151     { BindMTD,                          "BindMTD" },
 152     { ReportError,                      "ReportError" },
 153     { SuspendCard,                      "SuspendCard" },
 154     { ResumeCard,                       "ResumeCard" },
 155     { EjectCard,                        "EjectCard" },
 156     { InsertCard,                       "InsertCard" },
 157     { ReplaceCIS,                       "ReplaceCIS" }
 158 };
 159
 160
 161 static int pcmcia_report_error(client_handle_t handle, error_info_t *err)
 162 {
 163         int i;
 164         char *serv;
 165
 166         if (CHECK_HANDLE(handle))
 167                 printk(KERN_NOTICE);
 168         else {
 169                 struct pcmcia_device *p_dev = handle_to_pdev(handle);
 170                 printk(KERN_NOTICE "%s: ", p_dev->dev.bus_id);
 171         }
 172
 173         for (i = 0; i < ARRAY_SIZE(service_table); i++)
 174                 if (service_table[i].key == err->func)
 175                         break;
 176         if (i < ARRAY_SIZE(service_table))
 177                 serv = service_table[i].msg;
 178         else
 179                 serv = "Unknown service number";
 180
 181         for (i = 0; i < ARRAY_SIZE(error_table); i++)
 182                 if (error_table[i].key == err->retcode)
 183                         break;
 184         if (i < ARRAY_SIZE(error_table))
 185                 printk("%s: %s\n", serv, error_table[i].msg);
 186         else
 187                 printk("%s: Unknown error code %#x\n", serv, err->retcode);
 188
 189         return CS_SUCCESS;
 190 } /* report_error */
 191
 192 /* end of code which was in cs.c before */
 193
 194 /*======================================================================*/
 195
 196 void cs_error(client_handle_t handle, int func, int ret)
 197 {
 198         error_info_t err = { func, ret };
 199         pcmcia_report_error(handle, &err);
 200 }
 201 EXPORT_SYMBOL(cs_error);
 202
 203
 204 static void pcmcia_check_driver(struct pcmcia_driver *p_drv)
 205 {
 206         struct pcmcia_device_id *did = p_drv->id_table;
 207         unsigned int i;
 208         u32 hash;
 209
 210         if (!p_drv->attach || !p_drv->event || !p_drv->detach)
 211                 printk(KERN_DEBUG "pcmcia: %s does misses a callback function",
 212                        p_drv->drv.name);
 213
 214         while (did && did->match_flags) {
 215                 for (i=0; i<4; i++) {
 216                         if (!did->prod_id[i])
 217                                 continue;
 218
 219                         hash = crc32(0, did->prod_id[i], strlen(did->prod_id[i]));
 220                         if (hash == did->prod_id_hash[i])
 221                                 continue;
 222
 223                         printk(KERN_DEBUG "pcmcia: %s: invalid hash for "
 224                                "product string \"%s\": is 0x%x, should "
 225                                "be 0x%x\n", p_drv->drv.name, did->prod_id[i],
 226                                did->prod_id_hash[i], hash);
 227                         printk(KERN_DEBUG "pcmcia: see "
 228                                 "Documentation/pcmcia/devicetable.txt for "
 229                                 "details\n");
 230                 }
 231                 did++;
 232         }
 233
 234         return;
 235 }
 236
 237
 238 #ifdef CONFIG_PCMCIA_LOAD_CIS
 239
 240 /**
 241  * pcmcia_load_firmware - load CIS from userspace if device-provided is broken
 242  * @dev - the pcmcia device which needs a CIS override
 243  * @filename - requested filename in /lib/firmware/cis/
 244  *
 245  * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if
 246  * the one provided by the card is broken. The firmware files reside in
 247  * /lib/firmware/cis/ in userspace.
 248  */
 249 static int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
 250 {
 251         struct pcmcia_socket *s = dev->socket;
 252         const struct firmware *fw;
 253         char path[20];
 254         int ret=-ENOMEM;
 255         cisdump_t *cis;
 256
 257         if (!filename)
 258                 return -EINVAL;
 259
 260         ds_dbg(1, "trying to load firmware %s\n", filename);
 261
 262         if (strlen(filename) > 14)
 263                 return -EINVAL;
 264
 265         snprintf(path, 20, "%s", filename);
 266
 267         if (request_firmware(&fw, path, &dev->dev) == 0) {
 268                 if (fw->size >= CISTPL_MAX_CIS_SIZE)
 269                         goto release;
 270
 271                 cis = kmalloc(sizeof(cisdump_t), GFP_KERNEL);
 272                 if (!cis)
 273                         goto release;
 274
 275                 memset(cis, 0, sizeof(cisdump_t));
 276
 277                 cis->Length = fw->size + 1;
 278                 memcpy(cis->Data, fw->data, fw->size);
 279
 280                 if (!pcmcia_replace_cis(s, cis))
 281                         ret = 0;
 282         }
 283  release:
 284         release_firmware(fw);
 285
 286         return (ret);
 287 }
 288
 289 #else /* !CONFIG_PCMCIA_LOAD_CIS */
 290
 291 static inline int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
 292 {
 293         return -ENODEV;
 294 }
 295
 296 #endif
 297
 298
 299 /*======================================================================*/
 300
 301
 302 /**
 303  * pcmcia_register_driver - register a PCMCIA driver with the bus core
 304  *
 305  * Registers a PCMCIA driver with the PCMCIA bus core.
 306  */
 307 static int pcmcia_device_probe(struct device *dev);
 308 static int pcmcia_device_remove(struct device * dev);
 309
 310 int pcmcia_register_driver(struct pcmcia_driver *driver)
 311 {
 312         if (!driver)
 313                 return -EINVAL;
 314
 315         pcmcia_check_driver(driver);
 316
 317         /* initialize common fields */
 318         driver->drv.bus = &pcmcia_bus_type;
 319         driver->drv.owner = driver->owner;
 320         driver->drv.probe = pcmcia_device_probe;
 321         driver->drv.remove = pcmcia_device_remove;
 322
 323         return driver_register(&driver->drv);
 324 }
 325 EXPORT_SYMBOL(pcmcia_register_driver);
 326
 327 /**
 328  * pcmcia_unregister_driver - unregister a PCMCIA driver with the bus core
 329  */
 330 void pcmcia_unregister_driver(struct pcmcia_driver *driver)
 331 {
 332         driver_unregister(&driver->drv);
 333 }
 334 EXPORT_SYMBOL(pcmcia_unregister_driver);
 335
 336
 337 /* pcmcia_device handling */
 338
 339 struct pcmcia_device * pcmcia_get_dev(struct pcmcia_device *p_dev)
 340 {
 341         struct device *tmp_dev;
 342         tmp_dev = get_device(&p_dev->dev);
 343         if (!tmp_dev)
 344                 return NULL;
 345         return to_pcmcia_dev(tmp_dev);
 346 }
 347
 348 void pcmcia_put_dev(struct pcmcia_device *p_dev)
 349 {
 350         if (p_dev)
 351                 put_device(&p_dev->dev);
 352 }
 353
 354 static void pcmcia_release_dev(struct device *dev)
 355 {
 356         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 357         ds_dbg(1, "releasing dev %p\n", p_dev);
 358         pcmcia_put_socket(p_dev->socket);
 359         kfree(p_dev);
 360 }
 361
 362
 363 static int pcmcia_device_probe(struct device * dev)
 364 {
 365         struct pcmcia_device *p_dev;
 366         struct pcmcia_driver *p_drv;
 367         int ret = 0;
 368
 369         dev = get_device(dev);
 370         if (!dev)
 371                 return -ENODEV;
 372
 373         p_dev = to_pcmcia_dev(dev);
 374         p_drv = to_pcmcia_drv(dev->driver);
 375
 376         if (!try_module_get(p_drv->owner)) {
 377                 ret = -EINVAL;
 378                 goto put_dev;
 379         }
 380
 381         if (p_drv->attach) {
 382                 p_dev->instance = p_drv->attach();
 383                 if ((!p_dev->instance) || (p_dev->client.state & CLIENT_UNBOUND)) {
 384                         printk(KERN_NOTICE "ds: unable to create instance "
 385                                "of '%s'!\n", p_drv->drv.name);
 386                         ret = -EINVAL;
 387                 }
 388         }
 389
 390         if (ret)
 391                 module_put(p_drv->owner);
 392  put_dev:
 393         if ((ret) || !(p_drv->attach))
 394                 put_device(dev);
 395         return (ret);
 396 }
 397
 398
 399 static int pcmcia_device_remove(struct device * dev)
 400 {
 401         struct pcmcia_device *p_dev;
 402         struct pcmcia_driver *p_drv;
 403
 404         /* detach the "instance" */
 405         p_dev = to_pcmcia_dev(dev);
 406         p_drv = to_pcmcia_drv(dev->driver);
 407
 408         if (p_drv) {
 409                 if ((p_drv->detach) && (p_dev->instance)) {
 410                         p_drv->detach(p_dev->instance);
 411                         /* from pcmcia_probe_device */
 412                         put_device(&p_dev->dev);
 413                 }
 414                 module_put(p_drv->owner);
 415         }
 416
 417         return 0;
 418 }
 419
 420
 421
 422 /*
 423  * pcmcia_device_query -- determine information about a pcmcia device
 424  */
 425 static int pcmcia_device_query(struct pcmcia_device *p_dev)
 426 {
 427         cistpl_manfid_t manf_id;
 428         cistpl_funcid_t func_id;
 429         cistpl_vers_1_t vers1;
 430         unsigned int i;
 431
 432         if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 433                                CISTPL_MANFID, &manf_id)) {
 434                 p_dev->manf_id = manf_id.manf;
 435                 p_dev->card_id = manf_id.card;
 436                 p_dev->has_manf_id = 1;
 437                 p_dev->has_card_id = 1;
 438         }
 439
 440         if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 441                                CISTPL_FUNCID, &func_id)) {
 442                 p_dev->func_id = func_id.func;
 443                 p_dev->has_func_id = 1;
 444         } else {
 445                 /* rule of thumb: cards with no FUNCID, but with
 446                  * common memory device geometry information, are
 447                  * probably memory cards (from pcmcia-cs) */
 448                 cistpl_device_geo_t devgeo;
 449                 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 450                                       CISTPL_DEVICE_GEO, &devgeo)) {
 451                         ds_dbg(0, "mem device geometry probably means "
 452                                "FUNCID_MEMORY\n");
 453                         p_dev->func_id = CISTPL_FUNCID_MEMORY;
 454                         p_dev->has_func_id = 1;
 455                 }
 456         }
 457
 458         if (!pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_VERS_1,
 459                                &vers1)) {
 460                 for (i=0; i < vers1.ns; i++) {
 461                         char *tmp;
 462                         unsigned int length;
 463
 464                         tmp = vers1.str + vers1.ofs[i];
 465
 466                         length = strlen(tmp) + 1;
 467                         if ((length < 3) || (length > 255))
 468                                 continue;
 469
 470                         p_dev->prod_id[i] = kmalloc(sizeof(char) * length,
 471                                                     GFP_KERNEL);
 472                         if (!p_dev->prod_id[i])
 473                                 continue;
 474
 475                         p_dev->prod_id[i] = strncpy(p_dev->prod_id[i],
 476                                                     tmp, length);
 477                 }
 478         }
 479
 480         return 0;
 481 }
 482
 483
 484 /* device_add_lock is needed to avoid double registration by cardmgr and kernel.
 485  * Serializes pcmcia_device_add; will most likely be removed in future.
 486  *
 487  * While it has the caveat that adding new PCMCIA devices inside(!) device_register()
 488  * won't work, this doesn't matter much at the moment: the driver core doesn't
 489  * support it either.
 490  */
 491 static DECLARE_MUTEX(device_add_lock);
 492
 493 struct pcmcia_device * pcmcia_device_add(struct pcmcia_socket *s, unsigned int function)
 494 {
 495         struct pcmcia_device *p_dev;
 496         unsigned long flags;
 497
 498         s = pcmcia_get_socket(s);
 499         if (!s)
 500                 return NULL;
 501
 502         down(&device_add_lock);
 503
 504         /* max of 2 devices per card */
 505         if (s->device_count == 2)
 506                 goto err_put;
 507
 508         p_dev = kmalloc(sizeof(struct pcmcia_device), GFP_KERNEL);
 509         if (!p_dev)
 510                 goto err_put;
 511         memset(p_dev, 0, sizeof(struct pcmcia_device));
 512
 513         p_dev->socket = s;
 514         p_dev->device_no = (s->device_count++);
 515         p_dev->func   = function;
 516
 517         p_dev->dev.bus = &pcmcia_bus_type;
 518         p_dev->dev.parent = s->dev.dev;
 519         p_dev->dev.release = pcmcia_release_dev;
 520         sprintf (p_dev->dev.bus_id, "%d.%d", p_dev->socket->sock, p_dev->device_no);
 521
 522         /* compat */
 523         p_dev->client.client_magic = CLIENT_MAGIC;
 524         p_dev->client.Socket = s;
 525         p_dev->client.Function = function;
 526         p_dev->client.state = CLIENT_UNBOUND;
 527
 528         /* Add to the list in pcmcia_bus_socket */
 529         spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 530         list_add_tail(&p_dev->socket_device_list, &s->devices_list);
 531         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 532
 533         pcmcia_device_query(p_dev);
 534
 535         if (device_register(&p_dev->dev)) {
 536                 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 537                 list_del(&p_dev->socket_device_list);
 538                 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 539
 540                 goto err_free;
 541        }
 542
 543         up(&device_add_lock);
 544
 545         return p_dev;
 546
 547  err_free:
 548         kfree(p_dev);
 549         s->device_count--;
 550  err_put:
 551         up(&device_add_lock);
 552         pcmcia_put_socket(s);
 553
 554         return NULL;
 555 }
 556
 557
 558 static int pcmcia_card_add(struct pcmcia_socket *s)
 559 {
 560         cisinfo_t cisinfo;
 561         cistpl_longlink_mfc_t mfc;
 562         unsigned int no_funcs, i;
 563         int ret = 0;
 564
 565         if (!(s->resource_setup_done))
 566                 return -EAGAIN; /* try again, but later... */
 567
 568         pcmcia_validate_mem(s);
 569         ret = pccard_validate_cis(s, BIND_FN_ALL, &cisinfo);
 570         if (ret || !cisinfo.Chains) {
 571                 ds_dbg(0, "invalid CIS or invalid resources\n");
 572                 return -ENODEV;
 573         }
 574
 575         if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
 576                 no_funcs = mfc.nfn;
 577         else
 578                 no_funcs = 1;
 579
 580         /* this doesn't handle multifunction devices on one pcmcia function
 581          * yet. */
 582         for (i=0; i < no_funcs; i++)
 583                 pcmcia_device_add(s, i);
 584
 585         return (ret);
 586 }
 587
 588
 589 static void pcmcia_delayed_add_pseudo_device(void *data)
 590 {
 591         struct pcmcia_socket *s = data;
 592         pcmcia_device_add(s, 0);
 593         s->pcmcia_state.device_add_pending = 0;
 594 }
 595
 596 static inline void pcmcia_add_pseudo_device(struct pcmcia_socket *s)
 597 {
 598         if (!s->pcmcia_state.device_add_pending) {
 599                 schedule_work(&s->device_add);
 600                 s->pcmcia_state.device_add_pending = 1;
 601         }
 602         return;
 603 }
 604
 605 static int pcmcia_requery(struct device *dev, void * _data)
 606 {
 607         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 608         if (!p_dev->dev.driver)
 609                 pcmcia_device_query(p_dev);
 610
 611         return 0;
 612 }
 613
 614 static void pcmcia_bus_rescan(struct pcmcia_socket *skt)
 615 {
 616         int no_devices=0;
 617         unsigned long flags;
 618
 619         /* must be called with skt_sem held */
 620         spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 621         if (list_empty(&skt->devices_list))
 622                 no_devices=1;
 623         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 624
 625         /* if no devices were added for this socket yet because of
 626          * missing resource information or other trouble, we need to
 627          * do this now. */
 628         if (no_devices) {
 629                 int ret = pcmcia_card_add(skt);
 630                 if (ret)
 631                         return;
 632         }
 633
 634         /* some device information might have changed because of a CIS
 635          * update or because we can finally read it correctly... so
 636          * determine it again, overwriting old values if necessary. */
 637         bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery);
 638
 639         /* we re-scan all devices, not just the ones connected to this
 640          * socket. This does not matter, though. */
 641         bus_rescan_devices(&pcmcia_bus_type);
 642 }
 643
 644 static inline int pcmcia_devmatch(struct pcmcia_device *dev,
 645                                   struct pcmcia_device_id *did)
 646 {
 647         if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
 648                 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
 649                         return 0;
 650         }
 651
 652         if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
 653                 if ((!dev->has_card_id) || (dev->card_id != did->card_id))
 654                         return 0;
 655         }
 656
 657         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
 658                 if (dev->func != did->function)
 659                         return 0;
 660         }
 661
 662         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
 663                 if (!dev->prod_id[0])
 664                         return 0;
 665                 if (strcmp(did->prod_id[0], dev->prod_id[0]))
 666                         return 0;
 667         }
 668
 669         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
 670                 if (!dev->prod_id[1])
 671                         return 0;
 672                 if (strcmp(did->prod_id[1], dev->prod_id[1]))
 673                         return 0;
 674         }
 675
 676         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
 677                 if (!dev->prod_id[2])
 678                         return 0;
 679                 if (strcmp(did->prod_id[2], dev->prod_id[2]))
 680                         return 0;
 681         }
 682
 683         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
 684                 if (!dev->prod_id[3])
 685                         return 0;
 686                 if (strcmp(did->prod_id[3], dev->prod_id[3]))
 687                         return 0;
 688         }
 689
 690         if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
 691                 /* handle pseudo multifunction devices:
 692                  * there are at most two pseudo multifunction devices.
 693                  * if we're matching against the first, schedule a
 694                  * call which will then check whether there are two
 695                  * pseudo devices, and if not, add the second one.
 696                  */
 697                 if (dev->device_no == 0)
 698                         pcmcia_add_pseudo_device(dev->socket);
 699
 700                 if (dev->device_no != did->device_no)
 701                         return 0;
 702         }
 703
 704         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
 705                 if ((!dev->has_func_id) || (dev->func_id != did->func_id))
 706                         return 0;
 707
 708                 /* if this is a pseudo-multi-function device,
 709                  * we need explicit matches */
 710                 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO)
 711                         return 0;
 712                 if (dev->device_no)
 713                         return 0;
 714
 715                 /* also, FUNC_ID matching needs to be activated by userspace
 716                  * after it has re-checked that there is no possible module
 717                  * with a prod_id/manf_id/card_id match.
 718                  */
 719                 if (!dev->allow_func_id_match)
 720                         return 0;
 721         }
 722
 723         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
 724                 if (!dev->socket->fake_cis)
 725                         pcmcia_load_firmware(dev, did->cisfile);
 726
 727                 if (!dev->socket->fake_cis)
 728                         return 0;
 729         }
 730
 731         if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
 732                 int i;
 733                 for (i=0; i<4; i++)
 734                         if (dev->prod_id[i])
 735                                 return 0;
 736                 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
 737                         return 0;
 738         }
 739
 740         dev->dev.driver_data = (void *) did;
 741
 742         return 1;
 743 }
 744
 745
 746 static int pcmcia_bus_match(struct device * dev, struct device_driver * drv) {
 747         struct pcmcia_device * p_dev = to_pcmcia_dev(dev);
 748         struct pcmcia_driver * p_drv = to_pcmcia_drv(drv);
 749         struct pcmcia_device_id *did = p_drv->id_table;
 750
 751         /* matching by cardmgr */
 752         if (p_dev->cardmgr == p_drv)
 753                 return 1;
 754
 755         while (did && did->match_flags) {
 756                 if (pcmcia_devmatch(p_dev, did))
 757                         return 1;
 758                 did++;
 759         }
 760
 761         return 0;
 762 }
 763
 764 #ifdef CONFIG_HOTPLUG
 765
 766 static int pcmcia_bus_hotplug(struct device *dev, char **envp, int num_envp,
 767                               char *buffer, int buffer_size)
 768 {
 769         struct pcmcia_device *p_dev;
 770         int i, length = 0;
 771         u32 hash[4] = { 0, 0, 0, 0};
 772
 773         if (!dev)
 774                 return -ENODEV;
 775
 776         p_dev = to_pcmcia_dev(dev);
 777
 778         /* calculate hashes */
 779         for (i=0; i<4; i++) {
 780                 if (!p_dev->prod_id[i])
 781                         continue;
 782                 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
 783         }
 784
 785         i = 0;
 786
 787         if (add_hotplug_env_var(envp, num_envp, &i,
 788                                 buffer, buffer_size, &length,
 789                                 "SOCKET_NO=%u",
 790                                 p_dev->socket->sock))
 791                 return -ENOMEM;
 792
 793         if (add_hotplug_env_var(envp, num_envp, &i,
 794                                 buffer, buffer_size, &length,
 795                                 "DEVICE_NO=%02X",
 796                                 p_dev->device_no))
 797                 return -ENOMEM;
 798
 799         if (add_hotplug_env_var(envp, num_envp, &i,
 800                                 buffer, buffer_size, &length,
 801                                 "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
 802                                 "pa%08Xpb%08Xpc%08Xpd%08X",
 803                                 p_dev->has_manf_id ? p_dev->manf_id : 0,
 804                                 p_dev->has_card_id ? p_dev->card_id : 0,
 805                                 p_dev->has_func_id ? p_dev->func_id : 0,
 806                                 p_dev->func,
 807                                 p_dev->device_no,
 808                                 hash[0],
 809                                 hash[1],
 810                                 hash[2],
 811                                 hash[3]))
 812                 return -ENOMEM;
 813
 814         envp[i] = NULL;
 815
 816         return 0;
 817 }
 818
 819 #else
 820
 821 static int pcmcia_bus_hotplug(struct device *dev, char **envp, int num_envp,
 822                               char *buffer, int buffer_size)
 823 {
 824         return -ENODEV;
 825 }
 826
 827 #endif
 828
 829 /************************ per-device sysfs output ***************************/
 830
 831 #define pcmcia_device_attr(field, test, format)                         \
 832 static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf)              \
 833 {                                                                       \
 834         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);               \
 835         return p_dev->test ? sprintf (buf, format, p_dev->field) : -ENODEV; \
 836 }
 837
 838 #define pcmcia_device_stringattr(name, field)                                   \
 839 static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf)               \
 840 {                                                                       \
 841         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);               \
 842         return p_dev->field ? sprintf (buf, "%s\n", p_dev->field) : -ENODEV; \
 843 }
 844
 845 pcmcia_device_attr(func, socket, "0x%02x\n");
 846 pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
 847 pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
 848 pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
 849 pcmcia_device_stringattr(prod_id1, prod_id[0]);
 850 pcmcia_device_stringattr(prod_id2, prod_id[1]);
 851 pcmcia_device_stringattr(prod_id3, prod_id[2]);
 852 pcmcia_device_stringattr(prod_id4, prod_id[3]);
 853
 854 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
 855 {
 856         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 857         int i;
 858         u32 hash[4] = { 0, 0, 0, 0};
 859
 860         /* calculate hashes */
 861         for (i=0; i<4; i++) {
 862                 if (!p_dev->prod_id[i])
 863                         continue;
 864                 hash[i] = crc32(0,p_dev->prod_id[i],strlen(p_dev->prod_id[i]));
 865         }
 866         return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
 867                                 "pa%08Xpb%08Xpc%08Xpd%08X\n",
 868                                 p_dev->has_manf_id ? p_dev->manf_id : 0,
 869                                 p_dev->has_card_id ? p_dev->card_id : 0,
 870                                 p_dev->has_func_id ? p_dev->func_id : 0,
 871                                 p_dev->func, p_dev->device_no,
 872                                 hash[0], hash[1], hash[2], hash[3]);
 873 }
 874
 875 static ssize_t pcmcia_store_allow_func_id_match(struct device *dev,
 876                 struct device_attribute *attr, const char *buf, size_t count)
 877 {
 878         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 879         if (!count)
 880                 return -EINVAL;
 881
 882         down(&p_dev->socket->skt_sem);
 883         p_dev->allow_func_id_match = 1;
 884         up(&p_dev->socket->skt_sem);
 885
 886         bus_rescan_devices(&pcmcia_bus_type);
 887
 888         return count;
 889 }
 890
 891 static struct device_attribute pcmcia_dev_attrs[] = {
 892         __ATTR(function, 0444, func_show, NULL),
 893         __ATTR_RO(func_id),
 894         __ATTR_RO(manf_id),
 895         __ATTR_RO(card_id),
 896         __ATTR_RO(prod_id1),
 897         __ATTR_RO(prod_id2),
 898         __ATTR_RO(prod_id3),
 899         __ATTR_RO(prod_id4),
 900         __ATTR_RO(modalias),
 901         __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match),
 902         __ATTR_NULL,
 903 };
 904
 905
 906 /*======================================================================
 907
 908     The card status event handler.
 909
 910 ======================================================================*/
 911
 912 struct send_event_data {
 913         struct pcmcia_socket *skt;
 914         event_t event;
 915         int priority;
 916 };
 917
 918 static int send_event_callback(struct device *dev, void * _data)
 919 {
 920         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 921         struct pcmcia_driver *p_drv;
 922         struct send_event_data *data = _data;
 923
 924         /* we get called for all sockets, but may only pass the event
 925          * for drivers _on the affected socket_ */
 926         if (p_dev->socket != data->skt)
 927                 return 0;
 928
 929         p_drv = to_pcmcia_drv(p_dev->dev.driver);
 930         if (!p_drv)
 931                 return 0;
 932
 933         if (p_dev->client.state & (CLIENT_UNBOUND|CLIENT_STALE))
 934                 return 0;
 935
 936         if (p_drv->event)
 937                 return p_drv->event(data->event, data->priority,
 938                                     &p_dev->event_callback_args);
 939
 940         return 0;
 941 }
 942
 943 static int send_event(struct pcmcia_socket *s, event_t event, int priority)
 944 {
 945         struct send_event_data private;
 946
 947         private.skt = s;
 948         private.event = event;
 949         private.priority = priority;
 950
 951         return bus_for_each_dev(&pcmcia_bus_type, NULL, &private, send_event_callback);
 952 } /* send_event */
 953
 954
 955 /* Normally, the event is passed to individual drivers after
 956  * informing userspace. Only for CS_EVENT_CARD_REMOVAL this
 957  * is inversed to maintain historic compatibility.
 958  */
 959
 960 static int ds_event(struct pcmcia_socket *skt, event_t event, int priority)
 961 {
 962         struct pcmcia_socket *s = pcmcia_get_socket(skt);
 963         int ret = 0;
 964
 965         ds_dbg(1, "ds_event(0x%06x, %d, 0x%p)\n",
 966                event, priority, skt);
 967
 968         switch (event) {
 969
 970         case CS_EVENT_CARD_REMOVAL:
 971                 s->pcmcia_state.present = 0;
 972                 send_event(skt, event, priority);
 973                 unbind_request(skt);
 974                 handle_event(skt, event);
 975                 break;
 976
 977         case CS_EVENT_CARD_INSERTION:
 978                 s->pcmcia_state.present = 1;
 979                 pcmcia_card_add(skt);
 980                 handle_event(skt, event);
 981                 break;
 982
 983         case CS_EVENT_EJECTION_REQUEST:
 984                 ret = send_event(skt, event, priority);
 985                 break;
 986
 987         default:
 988                 handle_event(skt, event);
 989                 send_event(skt, event, priority);
 990                 break;
 991     }
 992
 993     pcmcia_put_socket(s);
 994
 995     return 0;
 996 } /* ds_event */
 997
 998
 999
1000 int pcmcia_register_client(client_handle_t *handle, client_reg_t *req)
1001 {
1002         client_t *client = NULL;
1003         struct pcmcia_socket *s = NULL;
1004         struct pcmcia_device *p_dev = NULL;
1005         struct pcmcia_driver *p_drv = NULL;
1006
1007         /* Look for unbound client with matching dev_info */
1008         down_read(&pcmcia_socket_list_rwsem);
1009         list_for_each_entry(s, &pcmcia_socket_list, socket_list) {
1010                 unsigned long flags;
1011
1012                 if (s->state & SOCKET_CARDBUS)
1013                         continue;
1014
1015                 s = pcmcia_get_socket(s);
1016                 if (!s)
1017                         continue;
1018                 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
1019                 list_for_each_entry(p_dev, &s->devices_list, socket_device_list) {
1020                         p_dev = pcmcia_get_dev(p_dev);
1021                         if (!p_dev)
1022                                 continue;
1023                         if (!(p_dev->client.state & CLIENT_UNBOUND) ||
1024                             (!p_dev->dev.driver)) {
1025                                 pcmcia_put_dev(p_dev);
1026                                 continue;
1027                         }
1028                         p_drv = to_pcmcia_drv(p_dev->dev.driver);
1029                         if (!strncmp(p_drv->drv.name, (char *)req->dev_info, DEV_NAME_LEN)) {
1030                                 client = &p_dev->client;
1031                                 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
1032                                 goto found;
1033                         }
1034                         pcmcia_put_dev(p_dev);
1035                 }
1036                 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
1037                 pcmcia_put_socket(s);
1038         }
1039  found:
1040         up_read(&pcmcia_socket_list_rwsem);
1041         if (!p_dev || !client)
1042                 return -ENODEV;
1043
1044         pcmcia_put_socket(s); /* safe, as we already hold a reference from bind_device */
1045
1046         *handle = client;
1047         client->state &= ~CLIENT_UNBOUND;
1048         client->Socket = s;
1049         p_dev->event_callback_args = req->event_callback_args;
1050         p_dev->event_callback_args.client_handle = client;
1051
1052
1053         if (s->state & SOCKET_CARDBUS)
1054                 client->state |= CLIENT_CARDBUS;
1055
1056         if ((!(s->state & SOCKET_CARDBUS)) && (s->functions == 0) &&
1057             (client->Function != BIND_FN_ALL)) {
1058                 cistpl_longlink_mfc_t mfc;
1059                 if (pccard_read_tuple(s, client->Function, CISTPL_LONGLINK_MFC, &mfc)
1060                     == CS_SUCCESS)
1061                         s->functions = mfc.nfn;
1062                 else
1063                         s->functions = 1;
1064                 s->config = kmalloc(sizeof(config_t) * s->functions,
1065                                     GFP_KERNEL);
1066                 if (!s->config)
1067                         goto out_no_resource;
1068                 memset(s->config, 0, sizeof(config_t) * s->functions);
1069         }
1070
1071         ds_dbg(1, "register_client(): client 0x%p, dev %s\n",
1072                client, p_dev->dev.bus_id);
1073
1074         if ((s->state & (SOCKET_PRESENT|SOCKET_CARDBUS)) == SOCKET_PRESENT) {
1075                 if (p_drv->event)
1076                         p_drv->event(CS_EVENT_CARD_INSERTION, CS_EVENT_PRI_LOW,
1077                                      &p_dev->event_callback_args);
1078
1079         }
1080
1081         return CS_SUCCESS;
1082
1083  out_no_resource:
1084         pcmcia_put_dev(p_dev);
1085         return CS_OUT_OF_RESOURCE;
1086 } /* register_client */
1087 EXPORT_SYMBOL(pcmcia_register_client);
1088
1089
1090 /* unbind _all_ devices attached to a given pcmcia_bus_socket. The
1091  * drivers have been called with EVENT_CARD_REMOVAL before.
1092  */
1093 static int unbind_request(struct pcmcia_socket *s)
1094 {
1095         struct pcmcia_device    *p_dev;
1096         unsigned long           flags;
1097
1098         ds_dbg(2, "unbind_request(%d)\n", s->sock);
1099
1100         s->device_count = 0;
1101
1102         for (;;) {
1103                 /* unregister all pcmcia_devices registered with this socket*/
1104                 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
1105                 if (list_empty(&s->devices_list)) {
1106                         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
1107                         return 0;
1108                 }
1109                 p_dev = list_entry((&s->devices_list)->next, struct pcmcia_device, socket_device_list);
1110                 list_del(&p_dev->socket_device_list);
1111                 p_dev->client.state |= CLIENT_STALE;
1112                 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
1113
1114                 device_unregister(&p_dev->dev);
1115         }
1116
1117         return 0;
1118 } /* unbind_request */
1119
1120 int pcmcia_deregister_client(client_handle_t handle)
1121 {
1122         struct pcmcia_socket *s;
1123         int i;
1124         struct pcmcia_device *p_dev = handle_to_pdev(handle);
1125
1126         if (CHECK_HANDLE(handle))
1127                 return CS_BAD_HANDLE;
1128
1129         s = SOCKET(handle);
1130         ds_dbg(1, "deregister_client(%p)\n", handle);
1131
1132         if (handle->state & (CLIENT_IRQ_REQ|CLIENT_IO_REQ|CLIENT_CONFIG_LOCKED))
1133                 goto warn_out;
1134         for (i = 0; i < MAX_WIN; i++)
1135                 if (handle->state & CLIENT_WIN_REQ(i))
1136                         goto warn_out;
1137
1138         if (handle->state & CLIENT_STALE) {
1139                 handle->client_magic = 0;
1140                 handle->state &= ~CLIENT_STALE;
1141                 pcmcia_put_dev(p_dev);
1142         } else {
1143                 handle->state = CLIENT_UNBOUND;
1144         }
1145
1146         return CS_SUCCESS;
1147  warn_out:
1148         printk(KERN_WARNING "ds: deregister_client was called too early.\n");
1149         return CS_IN_USE;
1150 } /* deregister_client */
1151 EXPORT_SYMBOL(pcmcia_deregister_client);
1152
1153 static struct pcmcia_callback pcmcia_bus_callback = {
1154         .owner = THIS_MODULE,
1155         .event = ds_event,
1156         .requery = pcmcia_bus_rescan,
1157 };
1158
1159 static int __devinit pcmcia_bus_add_socket(struct class_device *class_dev)
1160 {
1161         struct pcmcia_socket *socket = class_get_devdata(class_dev);
1162         int ret;
1163
1164         socket = pcmcia_get_socket(socket);
1165         if (!socket) {
1166                 printk(KERN_ERR "PCMCIA obtaining reference to socket %p failed\n", socket);
1167                 return -ENODEV;
1168         }
1169
1170         /*
1171          * Ugly. But we want to wait for the socket threads to have started up.
1172          * We really should let the drivers themselves drive some of this..
1173          */
1174         msleep(250);
1175
1176 #ifdef CONFIG_PCMCIA_IOCTL
1177         init_waitqueue_head(&socket->queue);
1178 #endif
1179         INIT_LIST_HEAD(&socket->devices_list);
1180         INIT_WORK(&socket->device_add, pcmcia_delayed_add_pseudo_device, socket);
1181         memset(&socket->pcmcia_state, 0, sizeof(u8));
1182         socket->device_count = 0;
1183
1184         ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback);
1185         if (ret) {
1186                 printk(KERN_ERR "PCMCIA registration PCCard core failed for socket %p\n", socket);
1187                 pcmcia_put_socket(socket);
1188                 return (ret);
1189         }
1190
1191         return 0;
1192 }
1193
1194 static void pcmcia_bus_remove_socket(struct class_device *class_dev)
1195 {
1196         struct pcmcia_socket *socket = class_get_devdata(class_dev);
1197
1198         if (!socket)
1199                 return;
1200
1201         socket->pcmcia_state.dead = 1;
1202         pccard_register_pcmcia(socket, NULL);
1203
1204         pcmcia_put_socket(socket);
1205
1206         return;
1207 }
1208
1209
1210 /* the pcmcia_bus_interface is used to handle pcmcia socket devices */
1211 static struct class_interface pcmcia_bus_interface = {
1212         .class = &pcmcia_socket_class,
1213         .add = &pcmcia_bus_add_socket,
1214         .remove = &pcmcia_bus_remove_socket,
1215 };
1216
1217
1218 struct bus_type pcmcia_bus_type = {
1219         .name = "pcmcia",
1220         .hotplug = pcmcia_bus_hotplug,
1221         .match = pcmcia_bus_match,
1222         .dev_attrs = pcmcia_dev_attrs,
1223 };
1224
1225
1226 static int __init init_pcmcia_bus(void)
1227 {
1228         spin_lock_init(&pcmcia_dev_list_lock);
1229
1230         bus_register(&pcmcia_bus_type);
1231         class_interface_register(&pcmcia_bus_interface);
1232
1233         pcmcia_setup_ioctl();
1234
1235         return 0;
1236 }
1237 fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that
1238                                * pcmcia_socket_class is already registered */
1239
1240
1241 static void __exit exit_pcmcia_bus(void)
1242 {
1243         pcmcia_cleanup_ioctl();
1244
1245         class_interface_unregister(&pcmcia_bus_interface);
1246
1247         bus_unregister(&pcmcia_bus_type);
1248 }
1249 module_exit(exit_pcmcia_bus);
1250
1251
1252 MODULE_ALIAS("ds");