git.oblomov.eu Git - 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(struct pcmcia_device *p_dev, error_info_t *err)
 162 {
 163         int i;
 164         char *serv;
 165
 166         if (!p_dev)
 167                 printk(KERN_NOTICE);
 168         else
 169                 printk(KERN_NOTICE "%s: ", p_dev->dev.bus_id);
 170
 171         for (i = 0; i < ARRAY_SIZE(service_table); i++)
 172                 if (service_table[i].key == err->func)
 173                         break;
 174         if (i < ARRAY_SIZE(service_table))
 175                 serv = service_table[i].msg;
 176         else
 177                 serv = "Unknown service number";
 178
 179         for (i = 0; i < ARRAY_SIZE(error_table); i++)
 180                 if (error_table[i].key == err->retcode)
 181                         break;
 182         if (i < ARRAY_SIZE(error_table))
 183                 printk("%s: %s\n", serv, error_table[i].msg);
 184         else
 185                 printk("%s: Unknown error code %#x\n", serv, err->retcode);
 186
 187         return CS_SUCCESS;
 188 } /* report_error */
 189
 190 /* end of code which was in cs.c before */
 191
 192 /*======================================================================*/
 193
 194 void cs_error(struct pcmcia_device *p_dev, int func, int ret)
 195 {
 196         error_info_t err = { func, ret };
 197         pcmcia_report_error(p_dev, &err);
 198 }
 199 EXPORT_SYMBOL(cs_error);
 200
 201
 202 static void pcmcia_check_driver(struct pcmcia_driver *p_drv)
 203 {
 204         struct pcmcia_device_id *did = p_drv->id_table;
 205         unsigned int i;
 206         u32 hash;
 207
 208         if (!p_drv->attach || !p_drv->event || !p_drv->detach)
 209                 printk(KERN_DEBUG "pcmcia: %s lacks a requisite callback "
 210                        "function\n", p_drv->drv.name);
 211
 212         while (did && did->match_flags) {
 213                 for (i=0; i<4; i++) {
 214                         if (!did->prod_id[i])
 215                                 continue;
 216
 217                         hash = crc32(0, did->prod_id[i], strlen(did->prod_id[i]));
 218                         if (hash == did->prod_id_hash[i])
 219                                 continue;
 220
 221                         printk(KERN_DEBUG "pcmcia: %s: invalid hash for "
 222                                "product string \"%s\": is 0x%x, should "
 223                                "be 0x%x\n", p_drv->drv.name, did->prod_id[i],
 224                                did->prod_id_hash[i], hash);
 225                         printk(KERN_DEBUG "pcmcia: see "
 226                                 "Documentation/pcmcia/devicetable.txt for "
 227                                 "details\n");
 228                 }
 229                 did++;
 230         }
 231
 232         return;
 233 }
 234
 235
 236 #ifdef CONFIG_PCMCIA_LOAD_CIS
 237
 238 /**
 239  * pcmcia_load_firmware - load CIS from userspace if device-provided is broken
 240  * @dev - the pcmcia device which needs a CIS override
 241  * @filename - requested filename in /lib/firmware/cis/
 242  *
 243  * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if
 244  * the one provided by the card is broken. The firmware files reside in
 245  * /lib/firmware/cis/ in userspace.
 246  */
 247 static int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
 248 {
 249         struct pcmcia_socket *s = dev->socket;
 250         const struct firmware *fw;
 251         char path[20];
 252         int ret=-ENOMEM;
 253         cisdump_t *cis;
 254
 255         if (!filename)
 256                 return -EINVAL;
 257
 258         ds_dbg(1, "trying to load firmware %s\n", filename);
 259
 260         if (strlen(filename) > 14)
 261                 return -EINVAL;
 262
 263         snprintf(path, 20, "%s", filename);
 264
 265         if (request_firmware(&fw, path, &dev->dev) == 0) {
 266                 if (fw->size >= CISTPL_MAX_CIS_SIZE)
 267                         goto release;
 268
 269                 cis = kmalloc(sizeof(cisdump_t), GFP_KERNEL);
 270                 if (!cis)
 271                         goto release;
 272
 273                 memset(cis, 0, sizeof(cisdump_t));
 274
 275                 cis->Length = fw->size + 1;
 276                 memcpy(cis->Data, fw->data, fw->size);
 277
 278                 if (!pcmcia_replace_cis(s, cis))
 279                         ret = 0;
 280         }
 281  release:
 282         release_firmware(fw);
 283
 284         return (ret);
 285 }
 286
 287 #else /* !CONFIG_PCMCIA_LOAD_CIS */
 288
 289 static inline int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
 290 {
 291         return -ENODEV;
 292 }
 293
 294 #endif
 295
 296
 297 /*======================================================================*/
 298
 299
 300 /**
 301  * pcmcia_register_driver - register a PCMCIA driver with the bus core
 302  *
 303  * Registers a PCMCIA driver with the PCMCIA bus core.
 304  */
 305 static int pcmcia_device_probe(struct device *dev);
 306 static int pcmcia_device_remove(struct device * dev);
 307
 308 int pcmcia_register_driver(struct pcmcia_driver *driver)
 309 {
 310         if (!driver)
 311                 return -EINVAL;
 312
 313         pcmcia_check_driver(driver);
 314
 315         /* initialize common fields */
 316         driver->drv.bus = &pcmcia_bus_type;
 317         driver->drv.owner = driver->owner;
 318         driver->drv.probe = pcmcia_device_probe;
 319         driver->drv.remove = pcmcia_device_remove;
 320
 321         return driver_register(&driver->drv);
 322 }
 323 EXPORT_SYMBOL(pcmcia_register_driver);
 324
 325 /**
 326  * pcmcia_unregister_driver - unregister a PCMCIA driver with the bus core
 327  */
 328 void pcmcia_unregister_driver(struct pcmcia_driver *driver)
 329 {
 330         driver_unregister(&driver->drv);
 331 }
 332 EXPORT_SYMBOL(pcmcia_unregister_driver);
 333
 334
 335 /* pcmcia_device handling */
 336
 337 struct pcmcia_device * pcmcia_get_dev(struct pcmcia_device *p_dev)
 338 {
 339         struct device *tmp_dev;
 340         tmp_dev = get_device(&p_dev->dev);
 341         if (!tmp_dev)
 342                 return NULL;
 343         return to_pcmcia_dev(tmp_dev);
 344 }
 345
 346 void pcmcia_put_dev(struct pcmcia_device *p_dev)
 347 {
 348         if (p_dev)
 349                 put_device(&p_dev->dev);
 350 }
 351
 352 static void pcmcia_release_dev(struct device *dev)
 353 {
 354         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 355         ds_dbg(1, "releasing dev %p\n", p_dev);
 356         pcmcia_put_socket(p_dev->socket);
 357         kfree(p_dev->devname);
 358         kfree(p_dev);
 359 }
 360
 361
 362 static int pcmcia_device_probe(struct device * dev)
 363 {
 364         struct pcmcia_device *p_dev;
 365         struct pcmcia_driver *p_drv;
 366         int ret = 0;
 367
 368         dev = get_device(dev);
 369         if (!dev)
 370                 return -ENODEV;
 371
 372         p_dev = to_pcmcia_dev(dev);
 373         p_drv = to_pcmcia_drv(dev->driver);
 374
 375         if (!try_module_get(p_drv->owner)) {
 376                 ret = -EINVAL;
 377                 goto put_dev;
 378         }
 379
 380         if (p_drv->attach) {
 381                 p_dev->instance = p_drv->attach();
 382                 if ((!p_dev->instance) || (p_dev->state & CLIENT_UNBOUND)) {
 383                         printk(KERN_NOTICE "ds: unable to create instance "
 384                                "of '%s'!\n", p_drv->drv.name);
 385                         ret = -EINVAL;
 386                 }
 387         }
 388
 389         if (ret)
 390                 module_put(p_drv->owner);
 391  put_dev:
 392         if ((ret) || !(p_drv->attach))
 393                 put_device(dev);
 394         return (ret);
 395 }
 396
 397
 398 static int pcmcia_device_remove(struct device * dev)
 399 {
 400         struct pcmcia_device *p_dev;
 401         struct pcmcia_driver *p_drv;
 402
 403         /* detach the "instance" */
 404         p_dev = to_pcmcia_dev(dev);
 405         p_drv = to_pcmcia_drv(dev->driver);
 406
 407         if (p_drv) {
 408                 if ((p_drv->detach) && (p_dev->instance)) {
 409                         p_drv->detach(p_dev->instance);
 410                         /* from pcmcia_probe_device */
 411                         put_device(&p_dev->dev);
 412                 }
 413                 module_put(p_drv->owner);
 414         }
 415
 416         return 0;
 417 }
 418
 419
 420
 421 /*
 422  * pcmcia_device_query -- determine information about a pcmcia device
 423  */
 424 static int pcmcia_device_query(struct pcmcia_device *p_dev)
 425 {
 426         cistpl_manfid_t manf_id;
 427         cistpl_funcid_t func_id;
 428         cistpl_vers_1_t *vers1;
 429         unsigned int i;
 430
 431         vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL);
 432         if (!vers1)
 433                 return -ENOMEM;
 434
 435         if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 436                                CISTPL_MANFID, &manf_id)) {
 437                 p_dev->manf_id = manf_id.manf;
 438                 p_dev->card_id = manf_id.card;
 439                 p_dev->has_manf_id = 1;
 440                 p_dev->has_card_id = 1;
 441         }
 442
 443         if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 444                                CISTPL_FUNCID, &func_id)) {
 445                 p_dev->func_id = func_id.func;
 446                 p_dev->has_func_id = 1;
 447         } else {
 448                 /* rule of thumb: cards with no FUNCID, but with
 449                  * common memory device geometry information, are
 450                  * probably memory cards (from pcmcia-cs) */
 451                 cistpl_device_geo_t *devgeo;
 452
 453                 devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL);
 454                 if (!devgeo) {
 455                         kfree(vers1);
 456                         return -ENOMEM;
 457                 }
 458                 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 459                                       CISTPL_DEVICE_GEO, devgeo)) {
 460                         ds_dbg(0, "mem device geometry probably means "
 461                                "FUNCID_MEMORY\n");
 462                         p_dev->func_id = CISTPL_FUNCID_MEMORY;
 463                         p_dev->has_func_id = 1;
 464                 }
 465                 kfree(devgeo);
 466         }
 467
 468         if (!pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_VERS_1,
 469                                vers1)) {
 470                 for (i=0; i < vers1->ns; i++) {
 471                         char *tmp;
 472                         unsigned int length;
 473
 474                         tmp = vers1->str + vers1->ofs[i];
 475
 476                         length = strlen(tmp) + 1;
 477                         if ((length < 3) || (length > 255))
 478                                 continue;
 479
 480                         p_dev->prod_id[i] = kmalloc(sizeof(char) * length,
 481                                                     GFP_KERNEL);
 482                         if (!p_dev->prod_id[i])
 483                                 continue;
 484
 485                         p_dev->prod_id[i] = strncpy(p_dev->prod_id[i],
 486                                                     tmp, length);
 487                 }
 488         }
 489
 490         kfree(vers1);
 491         return 0;
 492 }
 493
 494
 495 /* device_add_lock is needed to avoid double registration by cardmgr and kernel.
 496  * Serializes pcmcia_device_add; will most likely be removed in future.
 497  *
 498  * While it has the caveat that adding new PCMCIA devices inside(!) device_register()
 499  * won't work, this doesn't matter much at the moment: the driver core doesn't
 500  * support it either.
 501  */
 502 static DECLARE_MUTEX(device_add_lock);
 503
 504 struct pcmcia_device * pcmcia_device_add(struct pcmcia_socket *s, unsigned int function)
 505 {
 506         struct pcmcia_device *p_dev;
 507         unsigned long flags;
 508         int bus_id_len;
 509
 510         s = pcmcia_get_socket(s);
 511         if (!s)
 512                 return NULL;
 513
 514         down(&device_add_lock);
 515
 516         /* max of 2 devices per card */
 517         if (s->device_count == 2)
 518                 goto err_put;
 519
 520         p_dev = kmalloc(sizeof(struct pcmcia_device), GFP_KERNEL);
 521         if (!p_dev)
 522                 goto err_put;
 523         memset(p_dev, 0, sizeof(struct pcmcia_device));
 524
 525         p_dev->socket = s;
 526         p_dev->device_no = (s->device_count++);
 527         p_dev->func   = function;
 528
 529         p_dev->dev.bus = &pcmcia_bus_type;
 530         p_dev->dev.parent = s->dev.dev;
 531         p_dev->dev.release = pcmcia_release_dev;
 532         bus_id_len = sprintf (p_dev->dev.bus_id, "%d.%d", p_dev->socket->sock, p_dev->device_no);
 533
 534         p_dev->devname = kmalloc(6 + bus_id_len + 1, GFP_KERNEL);
 535         if (!p_dev->devname)
 536                 goto err_free;
 537         sprintf (p_dev->devname, "pcmcia%s", p_dev->dev.bus_id);
 538
 539         /* compat */
 540         p_dev->state = CLIENT_UNBOUND;
 541
 542         /* Add to the list in pcmcia_bus_socket */
 543         spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 544         list_add_tail(&p_dev->socket_device_list, &s->devices_list);
 545         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 546
 547         pcmcia_device_query(p_dev);
 548
 549         if (device_register(&p_dev->dev)) {
 550                 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 551                 list_del(&p_dev->socket_device_list);
 552                 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 553
 554                 goto err_free;
 555        }
 556
 557         up(&device_add_lock);
 558
 559         return p_dev;
 560
 561  err_free:
 562         kfree(p_dev->devname);
 563         kfree(p_dev);
 564         s->device_count--;
 565  err_put:
 566         up(&device_add_lock);
 567         pcmcia_put_socket(s);
 568
 569         return NULL;
 570 }
 571
 572
 573 static int pcmcia_card_add(struct pcmcia_socket *s)
 574 {
 575         cisinfo_t cisinfo;
 576         cistpl_longlink_mfc_t mfc;
 577         unsigned int no_funcs, i;
 578         int ret = 0;
 579
 580         if (!(s->resource_setup_done))
 581                 return -EAGAIN; /* try again, but later... */
 582
 583         pcmcia_validate_mem(s);
 584         ret = pccard_validate_cis(s, BIND_FN_ALL, &cisinfo);
 585         if (ret || !cisinfo.Chains) {
 586                 ds_dbg(0, "invalid CIS or invalid resources\n");
 587                 return -ENODEV;
 588         }
 589
 590         if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
 591                 no_funcs = mfc.nfn;
 592         else
 593                 no_funcs = 1;
 594
 595         for (i=0; i < no_funcs; i++)
 596                 pcmcia_device_add(s, i);
 597
 598         return (ret);
 599 }
 600
 601
 602 static void pcmcia_delayed_add_pseudo_device(void *data)
 603 {
 604         struct pcmcia_socket *s = data;
 605         pcmcia_device_add(s, 0);
 606         s->pcmcia_state.device_add_pending = 0;
 607 }
 608
 609 static inline void pcmcia_add_pseudo_device(struct pcmcia_socket *s)
 610 {
 611         if (!s->pcmcia_state.device_add_pending) {
 612                 s->pcmcia_state.device_add_pending = 1;
 613                 schedule_work(&s->device_add);
 614         }
 615         return;
 616 }
 617
 618 static int pcmcia_requery(struct device *dev, void * _data)
 619 {
 620         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 621         if (!p_dev->dev.driver)
 622                 pcmcia_device_query(p_dev);
 623
 624         return 0;
 625 }
 626
 627 static void pcmcia_bus_rescan(struct pcmcia_socket *skt)
 628 {
 629         int no_devices=0;
 630         unsigned long flags;
 631
 632         /* must be called with skt_sem held */
 633         spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 634         if (list_empty(&skt->devices_list))
 635                 no_devices=1;
 636         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 637
 638         /* if no devices were added for this socket yet because of
 639          * missing resource information or other trouble, we need to
 640          * do this now. */
 641         if (no_devices) {
 642                 int ret = pcmcia_card_add(skt);
 643                 if (ret)
 644                         return;
 645         }
 646
 647         /* some device information might have changed because of a CIS
 648          * update or because we can finally read it correctly... so
 649          * determine it again, overwriting old values if necessary. */
 650         bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery);
 651
 652         /* we re-scan all devices, not just the ones connected to this
 653          * socket. This does not matter, though. */
 654         bus_rescan_devices(&pcmcia_bus_type);
 655 }
 656
 657 static inline int pcmcia_devmatch(struct pcmcia_device *dev,
 658                                   struct pcmcia_device_id *did)
 659 {
 660         if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
 661                 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
 662                         return 0;
 663         }
 664
 665         if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
 666                 if ((!dev->has_card_id) || (dev->card_id != did->card_id))
 667                         return 0;
 668         }
 669
 670         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
 671                 if (dev->func != did->function)
 672                         return 0;
 673         }
 674
 675         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
 676                 if (!dev->prod_id[0])
 677                         return 0;
 678                 if (strcmp(did->prod_id[0], dev->prod_id[0]))
 679                         return 0;
 680         }
 681
 682         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
 683                 if (!dev->prod_id[1])
 684                         return 0;
 685                 if (strcmp(did->prod_id[1], dev->prod_id[1]))
 686                         return 0;
 687         }
 688
 689         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
 690                 if (!dev->prod_id[2])
 691                         return 0;
 692                 if (strcmp(did->prod_id[2], dev->prod_id[2]))
 693                         return 0;
 694         }
 695
 696         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
 697                 if (!dev->prod_id[3])
 698                         return 0;
 699                 if (strcmp(did->prod_id[3], dev->prod_id[3]))
 700                         return 0;
 701         }
 702
 703         if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
 704                 /* handle pseudo multifunction devices:
 705                  * there are at most two pseudo multifunction devices.
 706                  * if we're matching against the first, schedule a
 707                  * call which will then check whether there are two
 708                  * pseudo devices, and if not, add the second one.
 709                  */
 710                 if (dev->device_no == 0)
 711                         pcmcia_add_pseudo_device(dev->socket);
 712
 713                 if (dev->device_no != did->device_no)
 714                         return 0;
 715         }
 716
 717         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
 718                 if ((!dev->has_func_id) || (dev->func_id != did->func_id))
 719                         return 0;
 720
 721                 /* if this is a pseudo-multi-function device,
 722                  * we need explicit matches */
 723                 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO)
 724                         return 0;
 725                 if (dev->device_no)
 726                         return 0;
 727
 728                 /* also, FUNC_ID matching needs to be activated by userspace
 729                  * after it has re-checked that there is no possible module
 730                  * with a prod_id/manf_id/card_id match.
 731                  */
 732                 if (!dev->allow_func_id_match)
 733                         return 0;
 734         }
 735
 736         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
 737                 if (!dev->socket->fake_cis)
 738                         pcmcia_load_firmware(dev, did->cisfile);
 739
 740                 if (!dev->socket->fake_cis)
 741                         return 0;
 742         }
 743
 744         if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
 745                 int i;
 746                 for (i=0; i<4; i++)
 747                         if (dev->prod_id[i])
 748                                 return 0;
 749                 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
 750                         return 0;
 751         }
 752
 753         dev->dev.driver_data = (void *) did;
 754
 755         return 1;
 756 }
 757
 758
 759 static int pcmcia_bus_match(struct device * dev, struct device_driver * drv) {
 760         struct pcmcia_device * p_dev = to_pcmcia_dev(dev);
 761         struct pcmcia_driver * p_drv = to_pcmcia_drv(drv);
 762         struct pcmcia_device_id *did = p_drv->id_table;
 763
 764         /* matching by cardmgr */
 765         if (p_dev->cardmgr == p_drv)
 766                 return 1;
 767
 768         while (did && did->match_flags) {
 769                 if (pcmcia_devmatch(p_dev, did))
 770                         return 1;
 771                 did++;
 772         }
 773
 774         return 0;
 775 }
 776
 777 #ifdef CONFIG_HOTPLUG
 778
 779 static int pcmcia_bus_hotplug(struct device *dev, char **envp, int num_envp,
 780                               char *buffer, int buffer_size)
 781 {
 782         struct pcmcia_device *p_dev;
 783         int i, length = 0;
 784         u32 hash[4] = { 0, 0, 0, 0};
 785
 786         if (!dev)
 787                 return -ENODEV;
 788
 789         p_dev = to_pcmcia_dev(dev);
 790
 791         /* calculate hashes */
 792         for (i=0; i<4; i++) {
 793                 if (!p_dev->prod_id[i])
 794                         continue;
 795                 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
 796         }
 797
 798         i = 0;
 799
 800         if (add_hotplug_env_var(envp, num_envp, &i,
 801                                 buffer, buffer_size, &length,
 802                                 "SOCKET_NO=%u",
 803                                 p_dev->socket->sock))
 804                 return -ENOMEM;
 805
 806         if (add_hotplug_env_var(envp, num_envp, &i,
 807                                 buffer, buffer_size, &length,
 808                                 "DEVICE_NO=%02X",
 809                                 p_dev->device_no))
 810                 return -ENOMEM;
 811
 812         if (add_hotplug_env_var(envp, num_envp, &i,
 813                                 buffer, buffer_size, &length,
 814                                 "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
 815                                 "pa%08Xpb%08Xpc%08Xpd%08X",
 816                                 p_dev->has_manf_id ? p_dev->manf_id : 0,
 817                                 p_dev->has_card_id ? p_dev->card_id : 0,
 818                                 p_dev->has_func_id ? p_dev->func_id : 0,
 819                                 p_dev->func,
 820                                 p_dev->device_no,
 821                                 hash[0],
 822                                 hash[1],
 823                                 hash[2],
 824                                 hash[3]))
 825                 return -ENOMEM;
 826
 827         envp[i] = NULL;
 828
 829         return 0;
 830 }
 831
 832 #else
 833
 834 static int pcmcia_bus_hotplug(struct device *dev, char **envp, int num_envp,
 835                               char *buffer, int buffer_size)
 836 {
 837         return -ENODEV;
 838 }
 839
 840 #endif
 841
 842 /************************ per-device sysfs output ***************************/
 843
 844 #define pcmcia_device_attr(field, test, format)                         \
 845 static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf)              \
 846 {                                                                       \
 847         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);               \
 848         return p_dev->test ? sprintf (buf, format, p_dev->field) : -ENODEV; \
 849 }
 850
 851 #define pcmcia_device_stringattr(name, field)                                   \
 852 static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf)               \
 853 {                                                                       \
 854         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);               \
 855         return p_dev->field ? sprintf (buf, "%s\n", p_dev->field) : -ENODEV; \
 856 }
 857
 858 pcmcia_device_attr(func, socket, "0x%02x\n");
 859 pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
 860 pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
 861 pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
 862 pcmcia_device_stringattr(prod_id1, prod_id[0]);
 863 pcmcia_device_stringattr(prod_id2, prod_id[1]);
 864 pcmcia_device_stringattr(prod_id3, prod_id[2]);
 865 pcmcia_device_stringattr(prod_id4, prod_id[3]);
 866
 867 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
 868 {
 869         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 870         int i;
 871         u32 hash[4] = { 0, 0, 0, 0};
 872
 873         /* calculate hashes */
 874         for (i=0; i<4; i++) {
 875                 if (!p_dev->prod_id[i])
 876                         continue;
 877                 hash[i] = crc32(0,p_dev->prod_id[i],strlen(p_dev->prod_id[i]));
 878         }
 879         return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
 880                                 "pa%08Xpb%08Xpc%08Xpd%08X\n",
 881                                 p_dev->has_manf_id ? p_dev->manf_id : 0,
 882                                 p_dev->has_card_id ? p_dev->card_id : 0,
 883                                 p_dev->has_func_id ? p_dev->func_id : 0,
 884                                 p_dev->func, p_dev->device_no,
 885                                 hash[0], hash[1], hash[2], hash[3]);
 886 }
 887
 888 static ssize_t pcmcia_store_allow_func_id_match(struct device *dev,
 889                 struct device_attribute *attr, const char *buf, size_t count)
 890 {
 891         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 892         if (!count)
 893                 return -EINVAL;
 894
 895         down(&p_dev->socket->skt_sem);
 896         p_dev->allow_func_id_match = 1;
 897         up(&p_dev->socket->skt_sem);
 898
 899         bus_rescan_devices(&pcmcia_bus_type);
 900
 901         return count;
 902 }
 903
 904 static struct device_attribute pcmcia_dev_attrs[] = {
 905         __ATTR(function, 0444, func_show, NULL),
 906         __ATTR_RO(func_id),
 907         __ATTR_RO(manf_id),
 908         __ATTR_RO(card_id),
 909         __ATTR_RO(prod_id1),
 910         __ATTR_RO(prod_id2),
 911         __ATTR_RO(prod_id3),
 912         __ATTR_RO(prod_id4),
 913         __ATTR_RO(modalias),
 914         __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match),
 915         __ATTR_NULL,
 916 };
 917
 918
 919 /*======================================================================
 920
 921     The card status event handler.
 922
 923 ======================================================================*/
 924
 925 struct send_event_data {
 926         struct pcmcia_socket *skt;
 927         event_t event;
 928         int priority;
 929 };
 930
 931 static int send_event_callback(struct device *dev, void * _data)
 932 {
 933         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 934         struct pcmcia_driver *p_drv;
 935         struct send_event_data *data = _data;
 936
 937         /* we get called for all sockets, but may only pass the event
 938          * for drivers _on the affected socket_ */
 939         if (p_dev->socket != data->skt)
 940                 return 0;
 941
 942         p_drv = to_pcmcia_drv(p_dev->dev.driver);
 943         if (!p_drv)
 944                 return 0;
 945
 946         if (p_dev->state & (CLIENT_UNBOUND|CLIENT_STALE))
 947                 return 0;
 948
 949         if (p_drv->event)
 950                 return p_drv->event(data->event, data->priority,
 951                                     &p_dev->event_callback_args);
 952
 953         return 0;
 954 }
 955
 956 static int send_event(struct pcmcia_socket *s, event_t event, int priority)
 957 {
 958         struct send_event_data private;
 959
 960         private.skt = s;
 961         private.event = event;
 962         private.priority = priority;
 963
 964         return bus_for_each_dev(&pcmcia_bus_type, NULL, &private, send_event_callback);
 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_socket *s = pcmcia_get_socket(skt);
 976         int ret = 0;
 977
 978         ds_dbg(1, "ds_event(0x%06x, %d, 0x%p)\n",
 979                event, priority, skt);
 980
 981         switch (event) {
 982
 983         case CS_EVENT_CARD_REMOVAL:
 984                 s->pcmcia_state.present = 0;
 985                 send_event(skt, event, priority);
 986                 unbind_request(skt);
 987                 handle_event(skt, event);
 988                 break;
 989
 990         case CS_EVENT_CARD_INSERTION:
 991                 s->pcmcia_state.present = 1;
 992                 pcmcia_card_add(skt);
 993                 handle_event(skt, 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(skt, event);
1002                 send_event(skt, event, priority);
1003                 break;
1004     }
1005
1006     pcmcia_put_socket(s);
1007
1008     return 0;
1009 } /* ds_event */
1010
1011
1012
1013 int pcmcia_register_client(struct pcmcia_device **handle, client_reg_t *req)
1014 {
1015         struct pcmcia_socket *s = NULL;
1016         struct pcmcia_device *p_dev = NULL;
1017         struct pcmcia_driver *p_drv = NULL;
1018
1019         /* Look for unbound client with matching dev_info */
1020         down_read(&pcmcia_socket_list_rwsem);
1021         list_for_each_entry(s, &pcmcia_socket_list, socket_list) {
1022                 unsigned long flags;
1023
1024                 if (s->state & SOCKET_CARDBUS)
1025                         continue;
1026
1027                 s = pcmcia_get_socket(s);
1028                 if (!s)
1029                         continue;
1030                 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
1031                 list_for_each_entry(p_dev, &s->devices_list, socket_device_list) {
1032                         p_dev = pcmcia_get_dev(p_dev);
1033                         if (!p_dev)
1034                                 continue;
1035                         if (!(p_dev->state & CLIENT_UNBOUND) ||
1036                             (!p_dev->dev.driver)) {
1037                                 pcmcia_put_dev(p_dev);
1038                                 continue;
1039                         }
1040                         p_drv = to_pcmcia_drv(p_dev->dev.driver);
1041                         if (!strncmp(p_drv->drv.name, (char *)req->dev_info, DEV_NAME_LEN)) {
1042                                 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
1043                                 goto found;
1044                         }
1045                         pcmcia_put_dev(p_dev);
1046                 }
1047                 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
1048                 pcmcia_put_socket(s);
1049         }
1050  found:
1051         up_read(&pcmcia_socket_list_rwsem);
1052         if (!p_dev)
1053                 return -ENODEV;
1054
1055         pcmcia_put_socket(s); /* safe, as we already hold a reference from bind_device */
1056
1057         *handle = p_dev;
1058         p_dev->state &= ~CLIENT_UNBOUND;
1059         p_dev->event_callback_args = req->event_callback_args;
1060         p_dev->event_callback_args.client_handle = p_dev;
1061
1062
1063         if (!s->functions) {
1064                 cistpl_longlink_mfc_t mfc;
1065                 if (pccard_read_tuple(s, p_dev->func, CISTPL_LONGLINK_MFC, &mfc)
1066                     == CS_SUCCESS)
1067                         s->functions = mfc.nfn;
1068                 else
1069                         s->functions = 1;
1070                 s->config = kmalloc(sizeof(config_t) * s->functions,
1071                                     GFP_KERNEL);
1072                 if (!s->config)
1073                         goto out_no_resource;
1074                 memset(s->config, 0, sizeof(config_t) * s->functions);
1075         }
1076
1077         ds_dbg(1, "register_client(): client 0x%p, dev %s\n",
1078                p_dev, p_dev->dev.bus_id);
1079
1080         if ((s->state & (SOCKET_PRESENT|SOCKET_CARDBUS)) == SOCKET_PRESENT) {
1081                 if (p_drv->event)
1082                         p_drv->event(CS_EVENT_CARD_INSERTION, CS_EVENT_PRI_LOW,
1083                                      &p_dev->event_callback_args);
1084
1085         }
1086
1087         return CS_SUCCESS;
1088
1089  out_no_resource:
1090         pcmcia_put_dev(p_dev);
1091         return CS_OUT_OF_RESOURCE;
1092 } /* register_client */
1093 EXPORT_SYMBOL(pcmcia_register_client);
1094
1095
1096 /* unbind _all_ devices attached to a given pcmcia_bus_socket. The
1097  * drivers have been called with EVENT_CARD_REMOVAL before.
1098  */
1099 static int unbind_request(struct pcmcia_socket *s)
1100 {
1101         struct pcmcia_device    *p_dev;
1102         unsigned long           flags;
1103
1104         ds_dbg(2, "unbind_request(%d)\n", s->sock);
1105
1106         s->device_count = 0;
1107
1108         for (;;) {
1109                 /* unregister all pcmcia_devices registered with this socket*/
1110                 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
1111                 if (list_empty(&s->devices_list)) {
1112                         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
1113                         return 0;
1114                 }
1115                 p_dev = list_entry((&s->devices_list)->next, struct pcmcia_device, socket_device_list);
1116                 list_del(&p_dev->socket_device_list);
1117                 p_dev->state |= CLIENT_STALE;
1118                 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
1119
1120                 device_unregister(&p_dev->dev);
1121         }
1122
1123         return 0;
1124 } /* unbind_request */
1125
1126 int pcmcia_deregister_client(struct pcmcia_device *p_dev)
1127 {
1128         struct pcmcia_socket *s;
1129         int i;
1130
1131         s = p_dev->socket;
1132         ds_dbg(1, "deregister_client(%p)\n", p_dev);
1133
1134         if (p_dev->state & (CLIENT_IRQ_REQ|CLIENT_IO_REQ|CLIENT_CONFIG_LOCKED))
1135                 goto warn_out;
1136         for (i = 0; i < MAX_WIN; i++)
1137                 if (p_dev->state & CLIENT_WIN_REQ(i))
1138                         goto warn_out;
1139
1140         if (p_dev->state & CLIENT_STALE) {
1141                 p_dev->state &= ~CLIENT_STALE;
1142                 pcmcia_put_dev(p_dev);
1143         } else {
1144                 p_dev->state = CLIENT_UNBOUND;
1145         }
1146
1147         return CS_SUCCESS;
1148  warn_out:
1149         printk(KERN_WARNING "ds: deregister_client was called too early.\n");
1150         return CS_IN_USE;
1151 } /* deregister_client */
1152 EXPORT_SYMBOL(pcmcia_deregister_client);
1153
1154 static struct pcmcia_callback pcmcia_bus_callback = {
1155         .owner = THIS_MODULE,
1156         .event = ds_event,
1157         .requery = pcmcia_bus_rescan,
1158 };
1159
1160 static int __devinit pcmcia_bus_add_socket(struct class_device *class_dev)
1161 {
1162         struct pcmcia_socket *socket = class_get_devdata(class_dev);
1163         int ret;
1164
1165         socket = pcmcia_get_socket(socket);
1166         if (!socket) {
1167                 printk(KERN_ERR "PCMCIA obtaining reference to socket %p failed\n", socket);
1168                 return -ENODEV;
1169         }
1170
1171         /*
1172          * Ugly. But we want to wait for the socket threads to have started up.
1173          * We really should let the drivers themselves drive some of this..
1174          */
1175         msleep(250);
1176
1177 #ifdef CONFIG_PCMCIA_IOCTL
1178         init_waitqueue_head(&socket->queue);
1179 #endif
1180         INIT_LIST_HEAD(&socket->devices_list);
1181         INIT_WORK(&socket->device_add, pcmcia_delayed_add_pseudo_device, socket);
1182         memset(&socket->pcmcia_state, 0, sizeof(u8));
1183         socket->device_count = 0;
1184
1185         ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback);
1186         if (ret) {
1187                 printk(KERN_ERR "PCMCIA registration PCCard core failed for socket %p\n", socket);
1188                 pcmcia_put_socket(socket);
1189                 return (ret);
1190         }
1191
1192         return 0;
1193 }
1194
1195 static void pcmcia_bus_remove_socket(struct class_device *class_dev)
1196 {
1197         struct pcmcia_socket *socket = class_get_devdata(class_dev);
1198
1199         if (!socket)
1200                 return;
1201
1202         socket->pcmcia_state.dead = 1;
1203         pccard_register_pcmcia(socket, NULL);
1204
1205         pcmcia_put_socket(socket);
1206
1207         return;
1208 }
1209
1210
1211 /* the pcmcia_bus_interface is used to handle pcmcia socket devices */
1212 static struct class_interface pcmcia_bus_interface = {
1213         .class = &pcmcia_socket_class,
1214         .add = &pcmcia_bus_add_socket,
1215         .remove = &pcmcia_bus_remove_socket,
1216 };
1217
1218
1219 struct bus_type pcmcia_bus_type = {
1220         .name = "pcmcia",
1221         .hotplug = pcmcia_bus_hotplug,
1222         .match = pcmcia_bus_match,
1223         .dev_attrs = pcmcia_dev_attrs,
1224 };
1225
1226
1227 static int __init init_pcmcia_bus(void)
1228 {
1229         spin_lock_init(&pcmcia_dev_list_lock);
1230
1231         bus_register(&pcmcia_bus_type);
1232         class_interface_register(&pcmcia_bus_interface);
1233
1234         pcmcia_setup_ioctl();
1235
1236         return 0;
1237 }
1238 fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that
1239                                * pcmcia_socket_class is already registered */
1240
1241
1242 static void __exit exit_pcmcia_bus(void)
1243 {
1244         pcmcia_cleanup_ioctl();
1245
1246         class_interface_unregister(&pcmcia_bus_interface);
1247
1248         bus_unregister(&pcmcia_bus_type);
1249 }
1250 module_exit(exit_pcmcia_bus);
1251
1252
1253 MODULE_ALIAS("ds");