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);
 358 }
 359
 360
 361 static int pcmcia_device_probe(struct device * dev)
 362 {
 363         struct pcmcia_device *p_dev;
 364         struct pcmcia_driver *p_drv;
 365         int ret = 0;
 366
 367         dev = get_device(dev);
 368         if (!dev)
 369                 return -ENODEV;
 370
 371         p_dev = to_pcmcia_dev(dev);
 372         p_drv = to_pcmcia_drv(dev->driver);
 373
 374         if (!try_module_get(p_drv->owner)) {
 375                 ret = -EINVAL;
 376                 goto put_dev;
 377         }
 378
 379         if (p_drv->attach) {
 380                 p_dev->instance = p_drv->attach();
 381                 if ((!p_dev->instance) || (p_dev->state & CLIENT_UNBOUND)) {
 382                         printk(KERN_NOTICE "ds: unable to create instance "
 383                                "of '%s'!\n", p_drv->drv.name);
 384                         ret = -EINVAL;
 385                 }
 386         }
 387
 388         if (ret)
 389                 module_put(p_drv->owner);
 390  put_dev:
 391         if ((ret) || !(p_drv->attach))
 392                 put_device(dev);
 393         return (ret);
 394 }
 395
 396
 397 static int pcmcia_device_remove(struct device * dev)
 398 {
 399         struct pcmcia_device *p_dev;
 400         struct pcmcia_driver *p_drv;
 401
 402         /* detach the "instance" */
 403         p_dev = to_pcmcia_dev(dev);
 404         p_drv = to_pcmcia_drv(dev->driver);
 405
 406         if (p_drv) {
 407                 if ((p_drv->detach) && (p_dev->instance)) {
 408                         p_drv->detach(p_dev->instance);
 409                         /* from pcmcia_probe_device */
 410                         put_device(&p_dev->dev);
 411                 }
 412                 module_put(p_drv->owner);
 413         }
 414
 415         return 0;
 416 }
 417
 418
 419
 420 /*
 421  * pcmcia_device_query -- determine information about a pcmcia device
 422  */
 423 static int pcmcia_device_query(struct pcmcia_device *p_dev)
 424 {
 425         cistpl_manfid_t manf_id;
 426         cistpl_funcid_t func_id;
 427         cistpl_vers_1_t *vers1;
 428         unsigned int i;
 429
 430         vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL);
 431         if (!vers1)
 432                 return -ENOMEM;
 433
 434         if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 435                                CISTPL_MANFID, &manf_id)) {
 436                 p_dev->manf_id = manf_id.manf;
 437                 p_dev->card_id = manf_id.card;
 438                 p_dev->has_manf_id = 1;
 439                 p_dev->has_card_id = 1;
 440         }
 441
 442         if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 443                                CISTPL_FUNCID, &func_id)) {
 444                 p_dev->func_id = func_id.func;
 445                 p_dev->has_func_id = 1;
 446         } else {
 447                 /* rule of thumb: cards with no FUNCID, but with
 448                  * common memory device geometry information, are
 449                  * probably memory cards (from pcmcia-cs) */
 450                 cistpl_device_geo_t *devgeo;
 451
 452                 devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL);
 453                 if (!devgeo) {
 454                         kfree(vers1);
 455                         return -ENOMEM;
 456                 }
 457                 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 458                                       CISTPL_DEVICE_GEO, devgeo)) {
 459                         ds_dbg(0, "mem device geometry probably means "
 460                                "FUNCID_MEMORY\n");
 461                         p_dev->func_id = CISTPL_FUNCID_MEMORY;
 462                         p_dev->has_func_id = 1;
 463                 }
 464                 kfree(devgeo);
 465         }
 466
 467         if (!pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_VERS_1,
 468                                vers1)) {
 469                 for (i=0; i < vers1->ns; i++) {
 470                         char *tmp;
 471                         unsigned int length;
 472
 473                         tmp = vers1->str + vers1->ofs[i];
 474
 475                         length = strlen(tmp) + 1;
 476                         if ((length < 3) || (length > 255))
 477                                 continue;
 478
 479                         p_dev->prod_id[i] = kmalloc(sizeof(char) * length,
 480                                                     GFP_KERNEL);
 481                         if (!p_dev->prod_id[i])
 482                                 continue;
 483
 484                         p_dev->prod_id[i] = strncpy(p_dev->prod_id[i],
 485                                                     tmp, length);
 486                 }
 487         }
 488
 489         kfree(vers1);
 490         return 0;
 491 }
 492
 493
 494 /* device_add_lock is needed to avoid double registration by cardmgr and kernel.
 495  * Serializes pcmcia_device_add; will most likely be removed in future.
 496  *
 497  * While it has the caveat that adding new PCMCIA devices inside(!) device_register()
 498  * won't work, this doesn't matter much at the moment: the driver core doesn't
 499  * support it either.
 500  */
 501 static DECLARE_MUTEX(device_add_lock);
 502
 503 struct pcmcia_device * pcmcia_device_add(struct pcmcia_socket *s, unsigned int function)
 504 {
 505         struct pcmcia_device *p_dev;
 506         unsigned long flags;
 507
 508         s = pcmcia_get_socket(s);
 509         if (!s)
 510                 return NULL;
 511
 512         down(&device_add_lock);
 513
 514         /* max of 2 devices per card */
 515         if (s->device_count == 2)
 516                 goto err_put;
 517
 518         p_dev = kmalloc(sizeof(struct pcmcia_device), GFP_KERNEL);
 519         if (!p_dev)
 520                 goto err_put;
 521         memset(p_dev, 0, sizeof(struct pcmcia_device));
 522
 523         p_dev->socket = s;
 524         p_dev->device_no = (s->device_count++);
 525         p_dev->func   = function;
 526
 527         p_dev->dev.bus = &pcmcia_bus_type;
 528         p_dev->dev.parent = s->dev.dev;
 529         p_dev->dev.release = pcmcia_release_dev;
 530         sprintf (p_dev->dev.bus_id, "%d.%d", p_dev->socket->sock, p_dev->device_no);
 531
 532         /* compat */
 533         p_dev->state = CLIENT_UNBOUND;
 534
 535         /* Add to the list in pcmcia_bus_socket */
 536         spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 537         list_add_tail(&p_dev->socket_device_list, &s->devices_list);
 538         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 539
 540         pcmcia_device_query(p_dev);
 541
 542         if (device_register(&p_dev->dev)) {
 543                 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 544                 list_del(&p_dev->socket_device_list);
 545                 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 546
 547                 goto err_free;
 548        }
 549
 550         up(&device_add_lock);
 551
 552         return p_dev;
 553
 554  err_free:
 555         kfree(p_dev);
 556         s->device_count--;
 557  err_put:
 558         up(&device_add_lock);
 559         pcmcia_put_socket(s);
 560
 561         return NULL;
 562 }
 563
 564
 565 static int pcmcia_card_add(struct pcmcia_socket *s)
 566 {
 567         cisinfo_t cisinfo;
 568         cistpl_longlink_mfc_t mfc;
 569         unsigned int no_funcs, i;
 570         int ret = 0;
 571
 572         if (!(s->resource_setup_done))
 573                 return -EAGAIN; /* try again, but later... */
 574
 575         pcmcia_validate_mem(s);
 576         ret = pccard_validate_cis(s, BIND_FN_ALL, &cisinfo);
 577         if (ret || !cisinfo.Chains) {
 578                 ds_dbg(0, "invalid CIS or invalid resources\n");
 579                 return -ENODEV;
 580         }
 581
 582         if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
 583                 no_funcs = mfc.nfn;
 584         else
 585                 no_funcs = 1;
 586
 587         for (i=0; i < no_funcs; i++)
 588                 pcmcia_device_add(s, i);
 589
 590         return (ret);
 591 }
 592
 593
 594 static void pcmcia_delayed_add_pseudo_device(void *data)
 595 {
 596         struct pcmcia_socket *s = data;
 597         pcmcia_device_add(s, 0);
 598         s->pcmcia_state.device_add_pending = 0;
 599 }
 600
 601 static inline void pcmcia_add_pseudo_device(struct pcmcia_socket *s)
 602 {
 603         if (!s->pcmcia_state.device_add_pending) {
 604                 s->pcmcia_state.device_add_pending = 1;
 605                 schedule_work(&s->device_add);
 606         }
 607         return;
 608 }
 609
 610 static int pcmcia_requery(struct device *dev, void * _data)
 611 {
 612         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 613         if (!p_dev->dev.driver)
 614                 pcmcia_device_query(p_dev);
 615
 616         return 0;
 617 }
 618
 619 static void pcmcia_bus_rescan(struct pcmcia_socket *skt)
 620 {
 621         int no_devices=0;
 622         unsigned long flags;
 623
 624         /* must be called with skt_sem held */
 625         spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 626         if (list_empty(&skt->devices_list))
 627                 no_devices=1;
 628         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 629
 630         /* if no devices were added for this socket yet because of
 631          * missing resource information or other trouble, we need to
 632          * do this now. */
 633         if (no_devices) {
 634                 int ret = pcmcia_card_add(skt);
 635                 if (ret)
 636                         return;
 637         }
 638
 639         /* some device information might have changed because of a CIS
 640          * update or because we can finally read it correctly... so
 641          * determine it again, overwriting old values if necessary. */
 642         bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery);
 643
 644         /* we re-scan all devices, not just the ones connected to this
 645          * socket. This does not matter, though. */
 646         bus_rescan_devices(&pcmcia_bus_type);
 647 }
 648
 649 static inline int pcmcia_devmatch(struct pcmcia_device *dev,
 650                                   struct pcmcia_device_id *did)
 651 {
 652         if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
 653                 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
 654                         return 0;
 655         }
 656
 657         if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
 658                 if ((!dev->has_card_id) || (dev->card_id != did->card_id))
 659                         return 0;
 660         }
 661
 662         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
 663                 if (dev->func != did->function)
 664                         return 0;
 665         }
 666
 667         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
 668                 if (!dev->prod_id[0])
 669                         return 0;
 670                 if (strcmp(did->prod_id[0], dev->prod_id[0]))
 671                         return 0;
 672         }
 673
 674         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
 675                 if (!dev->prod_id[1])
 676                         return 0;
 677                 if (strcmp(did->prod_id[1], dev->prod_id[1]))
 678                         return 0;
 679         }
 680
 681         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
 682                 if (!dev->prod_id[2])
 683                         return 0;
 684                 if (strcmp(did->prod_id[2], dev->prod_id[2]))
 685                         return 0;
 686         }
 687
 688         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
 689                 if (!dev->prod_id[3])
 690                         return 0;
 691                 if (strcmp(did->prod_id[3], dev->prod_id[3]))
 692                         return 0;
 693         }
 694
 695         if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
 696                 /* handle pseudo multifunction devices:
 697                  * there are at most two pseudo multifunction devices.
 698                  * if we're matching against the first, schedule a
 699                  * call which will then check whether there are two
 700                  * pseudo devices, and if not, add the second one.
 701                  */
 702                 if (dev->device_no == 0)
 703                         pcmcia_add_pseudo_device(dev->socket);
 704
 705                 if (dev->device_no != did->device_no)
 706                         return 0;
 707         }
 708
 709         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
 710                 if ((!dev->has_func_id) || (dev->func_id != did->func_id))
 711                         return 0;
 712
 713                 /* if this is a pseudo-multi-function device,
 714                  * we need explicit matches */
 715                 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO)
 716                         return 0;
 717                 if (dev->device_no)
 718                         return 0;
 719
 720                 /* also, FUNC_ID matching needs to be activated by userspace
 721                  * after it has re-checked that there is no possible module
 722                  * with a prod_id/manf_id/card_id match.
 723                  */
 724                 if (!dev->allow_func_id_match)
 725                         return 0;
 726         }
 727
 728         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
 729                 if (!dev->socket->fake_cis)
 730                         pcmcia_load_firmware(dev, did->cisfile);
 731
 732                 if (!dev->socket->fake_cis)
 733                         return 0;
 734         }
 735
 736         if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
 737                 int i;
 738                 for (i=0; i<4; i++)
 739                         if (dev->prod_id[i])
 740                                 return 0;
 741                 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
 742                         return 0;
 743         }
 744
 745         dev->dev.driver_data = (void *) did;
 746
 747         return 1;
 748 }
 749
 750
 751 static int pcmcia_bus_match(struct device * dev, struct device_driver * drv) {
 752         struct pcmcia_device * p_dev = to_pcmcia_dev(dev);
 753         struct pcmcia_driver * p_drv = to_pcmcia_drv(drv);
 754         struct pcmcia_device_id *did = p_drv->id_table;
 755
 756         /* matching by cardmgr */
 757         if (p_dev->cardmgr == p_drv)
 758                 return 1;
 759
 760         while (did && did->match_flags) {
 761                 if (pcmcia_devmatch(p_dev, did))
 762                         return 1;
 763                 did++;
 764         }
 765
 766         return 0;
 767 }
 768
 769 #ifdef CONFIG_HOTPLUG
 770
 771 static int pcmcia_bus_hotplug(struct device *dev, char **envp, int num_envp,
 772                               char *buffer, int buffer_size)
 773 {
 774         struct pcmcia_device *p_dev;
 775         int i, length = 0;
 776         u32 hash[4] = { 0, 0, 0, 0};
 777
 778         if (!dev)
 779                 return -ENODEV;
 780
 781         p_dev = to_pcmcia_dev(dev);
 782
 783         /* calculate hashes */
 784         for (i=0; i<4; i++) {
 785                 if (!p_dev->prod_id[i])
 786                         continue;
 787                 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
 788         }
 789
 790         i = 0;
 791
 792         if (add_hotplug_env_var(envp, num_envp, &i,
 793                                 buffer, buffer_size, &length,
 794                                 "SOCKET_NO=%u",
 795                                 p_dev->socket->sock))
 796                 return -ENOMEM;
 797
 798         if (add_hotplug_env_var(envp, num_envp, &i,
 799                                 buffer, buffer_size, &length,
 800                                 "DEVICE_NO=%02X",
 801                                 p_dev->device_no))
 802                 return -ENOMEM;
 803
 804         if (add_hotplug_env_var(envp, num_envp, &i,
 805                                 buffer, buffer_size, &length,
 806                                 "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
 807                                 "pa%08Xpb%08Xpc%08Xpd%08X",
 808                                 p_dev->has_manf_id ? p_dev->manf_id : 0,
 809                                 p_dev->has_card_id ? p_dev->card_id : 0,
 810                                 p_dev->has_func_id ? p_dev->func_id : 0,
 811                                 p_dev->func,
 812                                 p_dev->device_no,
 813                                 hash[0],
 814                                 hash[1],
 815                                 hash[2],
 816                                 hash[3]))
 817                 return -ENOMEM;
 818
 819         envp[i] = NULL;
 820
 821         return 0;
 822 }
 823
 824 #else
 825
 826 static int pcmcia_bus_hotplug(struct device *dev, char **envp, int num_envp,
 827                               char *buffer, int buffer_size)
 828 {
 829         return -ENODEV;
 830 }
 831
 832 #endif
 833
 834 /************************ per-device sysfs output ***************************/
 835
 836 #define pcmcia_device_attr(field, test, format)                         \
 837 static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf)              \
 838 {                                                                       \
 839         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);               \
 840         return p_dev->test ? sprintf (buf, format, p_dev->field) : -ENODEV; \
 841 }
 842
 843 #define pcmcia_device_stringattr(name, field)                                   \
 844 static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf)               \
 845 {                                                                       \
 846         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);               \
 847         return p_dev->field ? sprintf (buf, "%s\n", p_dev->field) : -ENODEV; \
 848 }
 849
 850 pcmcia_device_attr(func, socket, "0x%02x\n");
 851 pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
 852 pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
 853 pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
 854 pcmcia_device_stringattr(prod_id1, prod_id[0]);
 855 pcmcia_device_stringattr(prod_id2, prod_id[1]);
 856 pcmcia_device_stringattr(prod_id3, prod_id[2]);
 857 pcmcia_device_stringattr(prod_id4, prod_id[3]);
 858
 859 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
 860 {
 861         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 862         int i;
 863         u32 hash[4] = { 0, 0, 0, 0};
 864
 865         /* calculate hashes */
 866         for (i=0; i<4; i++) {
 867                 if (!p_dev->prod_id[i])
 868                         continue;
 869                 hash[i] = crc32(0,p_dev->prod_id[i],strlen(p_dev->prod_id[i]));
 870         }
 871         return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
 872                                 "pa%08Xpb%08Xpc%08Xpd%08X\n",
 873                                 p_dev->has_manf_id ? p_dev->manf_id : 0,
 874                                 p_dev->has_card_id ? p_dev->card_id : 0,
 875                                 p_dev->has_func_id ? p_dev->func_id : 0,
 876                                 p_dev->func, p_dev->device_no,
 877                                 hash[0], hash[1], hash[2], hash[3]);
 878 }
 879
 880 static ssize_t pcmcia_store_allow_func_id_match(struct device *dev,
 881                 struct device_attribute *attr, const char *buf, size_t count)
 882 {
 883         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 884         if (!count)
 885                 return -EINVAL;
 886
 887         down(&p_dev->socket->skt_sem);
 888         p_dev->allow_func_id_match = 1;
 889         up(&p_dev->socket->skt_sem);
 890
 891         bus_rescan_devices(&pcmcia_bus_type);
 892
 893         return count;
 894 }
 895
 896 static struct device_attribute pcmcia_dev_attrs[] = {
 897         __ATTR(function, 0444, func_show, NULL),
 898         __ATTR_RO(func_id),
 899         __ATTR_RO(manf_id),
 900         __ATTR_RO(card_id),
 901         __ATTR_RO(prod_id1),
 902         __ATTR_RO(prod_id2),
 903         __ATTR_RO(prod_id3),
 904         __ATTR_RO(prod_id4),
 905         __ATTR_RO(modalias),
 906         __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match),
 907         __ATTR_NULL,
 908 };
 909
 910
 911 /*======================================================================
 912
 913     The card status event handler.
 914
 915 ======================================================================*/
 916
 917 struct send_event_data {
 918         struct pcmcia_socket *skt;
 919         event_t event;
 920         int priority;
 921 };
 922
 923 static int send_event_callback(struct device *dev, void * _data)
 924 {
 925         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 926         struct pcmcia_driver *p_drv;
 927         struct send_event_data *data = _data;
 928
 929         /* we get called for all sockets, but may only pass the event
 930          * for drivers _on the affected socket_ */
 931         if (p_dev->socket != data->skt)
 932                 return 0;
 933
 934         p_drv = to_pcmcia_drv(p_dev->dev.driver);
 935         if (!p_drv)
 936                 return 0;
 937
 938         if (p_dev->state & (CLIENT_UNBOUND|CLIENT_STALE))
 939                 return 0;
 940
 941         if (p_drv->event)
 942                 return p_drv->event(data->event, data->priority,
 943                                     &p_dev->event_callback_args);
 944
 945         return 0;
 946 }
 947
 948 static int send_event(struct pcmcia_socket *s, event_t event, int priority)
 949 {
 950         struct send_event_data private;
 951
 952         private.skt = s;
 953         private.event = event;
 954         private.priority = priority;
 955
 956         return bus_for_each_dev(&pcmcia_bus_type, NULL, &private, send_event_callback);
 957 } /* send_event */
 958
 959
 960 /* Normally, the event is passed to individual drivers after
 961  * informing userspace. Only for CS_EVENT_CARD_REMOVAL this
 962  * is inversed to maintain historic compatibility.
 963  */
 964
 965 static int ds_event(struct pcmcia_socket *skt, event_t event, int priority)
 966 {
 967         struct pcmcia_socket *s = pcmcia_get_socket(skt);
 968         int ret = 0;
 969
 970         ds_dbg(1, "ds_event(0x%06x, %d, 0x%p)\n",
 971                event, priority, skt);
 972
 973         switch (event) {
 974
 975         case CS_EVENT_CARD_REMOVAL:
 976                 s->pcmcia_state.present = 0;
 977                 send_event(skt, event, priority);
 978                 unbind_request(skt);
 979                 handle_event(skt, event);
 980                 break;
 981
 982         case CS_EVENT_CARD_INSERTION:
 983                 s->pcmcia_state.present = 1;
 984                 pcmcia_card_add(skt);
 985                 handle_event(skt, event);
 986                 break;
 987
 988         case CS_EVENT_EJECTION_REQUEST:
 989                 ret = send_event(skt, event, priority);
 990                 break;
 991
 992         default:
 993                 handle_event(skt, event);
 994                 send_event(skt, event, priority);
 995                 break;
 996     }
 997
 998     pcmcia_put_socket(s);
 999
1000     return 0;
1001 } /* ds_event */
1002
1003
1004
1005 int pcmcia_register_client(struct pcmcia_device **handle, client_reg_t *req)
1006 {
1007         struct pcmcia_socket *s = NULL;
1008         struct pcmcia_device *p_dev = NULL;
1009         struct pcmcia_driver *p_drv = NULL;
1010
1011         /* Look for unbound client with matching dev_info */
1012         down_read(&pcmcia_socket_list_rwsem);
1013         list_for_each_entry(s, &pcmcia_socket_list, socket_list) {
1014                 unsigned long flags;
1015
1016                 if (s->state & SOCKET_CARDBUS)
1017                         continue;
1018
1019                 s = pcmcia_get_socket(s);
1020                 if (!s)
1021                         continue;
1022                 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
1023                 list_for_each_entry(p_dev, &s->devices_list, socket_device_list) {
1024                         p_dev = pcmcia_get_dev(p_dev);
1025                         if (!p_dev)
1026                                 continue;
1027                         if (!(p_dev->state & CLIENT_UNBOUND) ||
1028                             (!p_dev->dev.driver)) {
1029                                 pcmcia_put_dev(p_dev);
1030                                 continue;
1031                         }
1032                         p_drv = to_pcmcia_drv(p_dev->dev.driver);
1033                         if (!strncmp(p_drv->drv.name, (char *)req->dev_info, DEV_NAME_LEN)) {
1034                                 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
1035                                 goto found;
1036                         }
1037                         pcmcia_put_dev(p_dev);
1038                 }
1039                 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
1040                 pcmcia_put_socket(s);
1041         }
1042  found:
1043         up_read(&pcmcia_socket_list_rwsem);
1044         if (!p_dev)
1045                 return -ENODEV;
1046
1047         pcmcia_put_socket(s); /* safe, as we already hold a reference from bind_device */
1048
1049         *handle = p_dev;
1050         p_dev->state &= ~CLIENT_UNBOUND;
1051         p_dev->event_callback_args = req->event_callback_args;
1052         p_dev->event_callback_args.client_handle = p_dev;
1053
1054
1055         if (!s->functions) {
1056                 cistpl_longlink_mfc_t mfc;
1057                 if (pccard_read_tuple(s, p_dev->func, CISTPL_LONGLINK_MFC, &mfc)
1058                     == CS_SUCCESS)
1059                         s->functions = mfc.nfn;
1060                 else
1061                         s->functions = 1;
1062                 s->config = kmalloc(sizeof(config_t) * s->functions,
1063                                     GFP_KERNEL);
1064                 if (!s->config)
1065                         goto out_no_resource;
1066                 memset(s->config, 0, sizeof(config_t) * s->functions);
1067         }
1068
1069         ds_dbg(1, "register_client(): client 0x%p, dev %s\n",
1070                p_dev, p_dev->dev.bus_id);
1071
1072         if ((s->state & (SOCKET_PRESENT|SOCKET_CARDBUS)) == SOCKET_PRESENT) {
1073                 if (p_drv->event)
1074                         p_drv->event(CS_EVENT_CARD_INSERTION, CS_EVENT_PRI_LOW,
1075                                      &p_dev->event_callback_args);
1076
1077         }
1078
1079         return CS_SUCCESS;
1080
1081  out_no_resource:
1082         pcmcia_put_dev(p_dev);
1083         return CS_OUT_OF_RESOURCE;
1084 } /* register_client */
1085 EXPORT_SYMBOL(pcmcia_register_client);
1086
1087
1088 /* unbind _all_ devices attached to a given pcmcia_bus_socket. The
1089  * drivers have been called with EVENT_CARD_REMOVAL before.
1090  */
1091 static int unbind_request(struct pcmcia_socket *s)
1092 {
1093         struct pcmcia_device    *p_dev;
1094         unsigned long           flags;
1095
1096         ds_dbg(2, "unbind_request(%d)\n", s->sock);
1097
1098         s->device_count = 0;
1099
1100         for (;;) {
1101                 /* unregister all pcmcia_devices registered with this socket*/
1102                 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
1103                 if (list_empty(&s->devices_list)) {
1104                         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
1105                         return 0;
1106                 }
1107                 p_dev = list_entry((&s->devices_list)->next, struct pcmcia_device, socket_device_list);
1108                 list_del(&p_dev->socket_device_list);
1109                 p_dev->state |= CLIENT_STALE;
1110                 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
1111
1112                 device_unregister(&p_dev->dev);
1113         }
1114
1115         return 0;
1116 } /* unbind_request */
1117
1118 int pcmcia_deregister_client(struct pcmcia_device *p_dev)
1119 {
1120         struct pcmcia_socket *s;
1121         int i;
1122
1123         s = p_dev->socket;
1124         ds_dbg(1, "deregister_client(%p)\n", p_dev);
1125
1126         if (p_dev->state & (CLIENT_IRQ_REQ|CLIENT_IO_REQ|CLIENT_CONFIG_LOCKED))
1127                 goto warn_out;
1128         for (i = 0; i < MAX_WIN; i++)
1129                 if (p_dev->state & CLIENT_WIN_REQ(i))
1130                         goto warn_out;
1131
1132         if (p_dev->state & CLIENT_STALE) {
1133                 p_dev->state &= ~CLIENT_STALE;
1134                 pcmcia_put_dev(p_dev);
1135         } else {
1136                 p_dev->state = CLIENT_UNBOUND;
1137         }
1138
1139         return CS_SUCCESS;
1140  warn_out:
1141         printk(KERN_WARNING "ds: deregister_client was called too early.\n");
1142         return CS_IN_USE;
1143 } /* deregister_client */
1144 EXPORT_SYMBOL(pcmcia_deregister_client);
1145
1146 static struct pcmcia_callback pcmcia_bus_callback = {
1147         .owner = THIS_MODULE,
1148         .event = ds_event,
1149         .requery = pcmcia_bus_rescan,
1150 };
1151
1152 static int __devinit pcmcia_bus_add_socket(struct class_device *class_dev)
1153 {
1154         struct pcmcia_socket *socket = class_get_devdata(class_dev);
1155         int ret;
1156
1157         socket = pcmcia_get_socket(socket);
1158         if (!socket) {
1159                 printk(KERN_ERR "PCMCIA obtaining reference to socket %p failed\n", socket);
1160                 return -ENODEV;
1161         }
1162
1163         /*
1164          * Ugly. But we want to wait for the socket threads to have started up.
1165          * We really should let the drivers themselves drive some of this..
1166          */
1167         msleep(250);
1168
1169 #ifdef CONFIG_PCMCIA_IOCTL
1170         init_waitqueue_head(&socket->queue);
1171 #endif
1172         INIT_LIST_HEAD(&socket->devices_list);
1173         INIT_WORK(&socket->device_add, pcmcia_delayed_add_pseudo_device, socket);
1174         memset(&socket->pcmcia_state, 0, sizeof(u8));
1175         socket->device_count = 0;
1176
1177         ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback);
1178         if (ret) {
1179                 printk(KERN_ERR "PCMCIA registration PCCard core failed for socket %p\n", socket);
1180                 pcmcia_put_socket(socket);
1181                 return (ret);
1182         }
1183
1184         return 0;
1185 }
1186
1187 static void pcmcia_bus_remove_socket(struct class_device *class_dev)
1188 {
1189         struct pcmcia_socket *socket = class_get_devdata(class_dev);
1190
1191         if (!socket)
1192                 return;
1193
1194         socket->pcmcia_state.dead = 1;
1195         pccard_register_pcmcia(socket, NULL);
1196
1197         pcmcia_put_socket(socket);
1198
1199         return;
1200 }
1201
1202
1203 /* the pcmcia_bus_interface is used to handle pcmcia socket devices */
1204 static struct class_interface pcmcia_bus_interface = {
1205         .class = &pcmcia_socket_class,
1206         .add = &pcmcia_bus_add_socket,
1207         .remove = &pcmcia_bus_remove_socket,
1208 };
1209
1210
1211 struct bus_type pcmcia_bus_type = {
1212         .name = "pcmcia",
1213         .hotplug = pcmcia_bus_hotplug,
1214         .match = pcmcia_bus_match,
1215         .dev_attrs = pcmcia_dev_attrs,
1216 };
1217
1218
1219 static int __init init_pcmcia_bus(void)
1220 {
1221         spin_lock_init(&pcmcia_dev_list_lock);
1222
1223         bus_register(&pcmcia_bus_type);
1224         class_interface_register(&pcmcia_bus_interface);
1225
1226         pcmcia_setup_ioctl();
1227
1228         return 0;
1229 }
1230 fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that
1231                                * pcmcia_socket_class is already registered */
1232
1233
1234 static void __exit exit_pcmcia_bus(void)
1235 {
1236         pcmcia_cleanup_ioctl();
1237
1238         class_interface_unregister(&pcmcia_bus_interface);
1239
1240         bus_unregister(&pcmcia_bus_type);
1241 }
1242 module_exit(exit_pcmcia_bus);
1243
1244
1245 MODULE_ALIAS("ds");