drivers/pcmcia/ds.c

   1 /*
   2  * ds.c -- 16-bit PCMCIA core support
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2 as
   6  * published by the Free Software Foundation.
   7  *
   8  * The initial developer of the original code is David A. Hinds
   9  * <dahinds@users.sourceforge.net>.  Portions created by David A. Hinds
  10  * are Copyright (C) 1999 David A. Hinds.  All Rights Reserved.
  11  *
  12  * (C) 1999             David A. Hinds
  13  * (C) 2003 - 2004      Dominik Brodowski
  14  */
  15
  16 #include <linux/config.h>
  17 #include <linux/module.h>
  18 #include <linux/moduleparam.h>
  19 #include <linux/init.h>
  20 #include <linux/kernel.h>
  21 #include <linux/major.h>
  22 #include <linux/string.h>
  23 #include <linux/errno.h>
  24 #include <linux/slab.h>
  25 #include <linux/mm.h>
  26 #include <linux/fcntl.h>
  27 #include <linux/sched.h>
  28 #include <linux/smp_lock.h>
  29 #include <linux/timer.h>
  30 #include <linux/ioctl.h>
  31 #include <linux/proc_fs.h>
  32 #include <linux/poll.h>
  33 #include <linux/pci.h>
  34 #include <linux/list.h>
  35 #include <linux/delay.h>
  36 #include <linux/kref.h>
  37 #include <linux/workqueue.h>
  38 #include <linux/crc32.h>
  39 #include <linux/firmware.h>
  40
  41 #include <asm/atomic.h>
  42
  43 #define IN_CARD_SERVICES
  44 #include <pcmcia/version.h>
  45 #include <pcmcia/cs_types.h>
  46 #include <pcmcia/cs.h>
  47 #include <pcmcia/bulkmem.h>
  48 #include <pcmcia/cistpl.h>
  49 #include <pcmcia/ds.h>
  50 #include <pcmcia/ss.h>
  51
  52 #include "cs_internal.h"
  53 #include "ds_internal.h"
  54
  55 /*====================================================================*/
  56
  57 /* Module parameters */
  58
  59 MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
  60 MODULE_DESCRIPTION("PCMCIA Driver Services");
  61 MODULE_LICENSE("GPL");
  62
  63 #ifdef DEBUG
  64 int ds_pc_debug;
  65
  66 module_param_named(pc_debug, ds_pc_debug, int, 0644);
  67
  68 #define ds_dbg(lvl, fmt, arg...) do {                           \
  69         if (ds_pc_debug > (lvl))                                        \
  70                 printk(KERN_DEBUG "ds: " fmt , ## arg);         \
  71 } while (0)
  72 #else
  73 #define ds_dbg(lvl, fmt, arg...) do { } while (0)
  74 #endif
  75
  76 spinlock_t pcmcia_dev_list_lock;
  77
  78 static int unbind_request(struct pcmcia_socket *s);
  79
  80 /*====================================================================*/
  81
  82 /* code which was in cs.c before */
  83
  84 /* String tables for error messages */
  85
  86 typedef struct lookup_t {
  87     int key;
  88     char *msg;
  89 } lookup_t;
  90
  91 static const lookup_t error_table[] = {
  92     { CS_SUCCESS,               "Operation succeeded" },
  93     { CS_BAD_ADAPTER,           "Bad adapter" },
  94     { CS_BAD_ATTRIBUTE,         "Bad attribute", },
  95     { CS_BAD_BASE,              "Bad base address" },
  96     { CS_BAD_EDC,               "Bad EDC" },
  97     { CS_BAD_IRQ,               "Bad IRQ" },
  98     { CS_BAD_OFFSET,            "Bad offset" },
  99     { CS_BAD_PAGE,              "Bad page number" },
 100     { CS_READ_FAILURE,          "Read failure" },
 101     { CS_BAD_SIZE,              "Bad size" },
 102     { CS_BAD_SOCKET,            "Bad socket" },
 103     { CS_BAD_TYPE,              "Bad type" },
 104     { CS_BAD_VCC,               "Bad Vcc" },
 105     { CS_BAD_VPP,               "Bad Vpp" },
 106     { CS_BAD_WINDOW,            "Bad window" },
 107     { CS_WRITE_FAILURE,         "Write failure" },
 108     { CS_NO_CARD,               "No card present" },
 109     { CS_UNSUPPORTED_FUNCTION,  "Usupported function" },
 110     { CS_UNSUPPORTED_MODE,      "Unsupported mode" },
 111     { CS_BAD_SPEED,             "Bad speed" },
 112     { CS_BUSY,                  "Resource busy" },
 113     { CS_GENERAL_FAILURE,       "General failure" },
 114     { CS_WRITE_PROTECTED,       "Write protected" },
 115     { CS_BAD_ARG_LENGTH,        "Bad argument length" },
 116     { CS_BAD_ARGS,              "Bad arguments" },
 117     { CS_CONFIGURATION_LOCKED,  "Configuration locked" },
 118     { CS_IN_USE,                "Resource in use" },
 119     { CS_NO_MORE_ITEMS,         "No more items" },
 120     { CS_OUT_OF_RESOURCE,       "Out of resource" },
 121     { CS_BAD_HANDLE,            "Bad handle" },
 122     { CS_BAD_TUPLE,             "Bad CIS tuple" }
 123 };
 124
 125
 126 static const lookup_t service_table[] = {
 127     { AccessConfigurationRegister,      "AccessConfigurationRegister" },
 128     { AddSocketServices,                "AddSocketServices" },
 129     { AdjustResourceInfo,               "AdjustResourceInfo" },
 130     { CheckEraseQueue,                  "CheckEraseQueue" },
 131     { CloseMemory,                      "CloseMemory" },
 132     { DeregisterClient,                 "DeregisterClient" },
 133     { DeregisterEraseQueue,             "DeregisterEraseQueue" },
 134     { GetCardServicesInfo,              "GetCardServicesInfo" },
 135     { GetClientInfo,                    "GetClientInfo" },
 136     { GetConfigurationInfo,             "GetConfigurationInfo" },
 137     { GetEventMask,                     "GetEventMask" },
 138     { GetFirstClient,                   "GetFirstClient" },
 139     { GetFirstRegion,                   "GetFirstRegion" },
 140     { GetFirstTuple,                    "GetFirstTuple" },
 141     { GetNextClient,                    "GetNextClient" },
 142     { GetNextRegion,                    "GetNextRegion" },
 143     { GetNextTuple,                     "GetNextTuple" },
 144     { GetStatus,                        "GetStatus" },
 145     { GetTupleData,                     "GetTupleData" },
 146     { MapMemPage,                       "MapMemPage" },
 147     { ModifyConfiguration,              "ModifyConfiguration" },
 148     { ModifyWindow,                     "ModifyWindow" },
 149     { OpenMemory,                       "OpenMemory" },
 150     { ParseTuple,                       "ParseTuple" },
 151     { ReadMemory,                       "ReadMemory" },
 152     { RegisterClient,                   "RegisterClient" },
 153     { RegisterEraseQueue,               "RegisterEraseQueue" },
 154     { RegisterMTD,                      "RegisterMTD" },
 155     { ReleaseConfiguration,             "ReleaseConfiguration" },
 156     { ReleaseIO,                        "ReleaseIO" },
 157     { ReleaseIRQ,                       "ReleaseIRQ" },
 158     { ReleaseWindow,                    "ReleaseWindow" },
 159     { RequestConfiguration,             "RequestConfiguration" },
 160     { RequestIO,                        "RequestIO" },
 161     { RequestIRQ,                       "RequestIRQ" },
 162     { RequestSocketMask,                "RequestSocketMask" },
 163     { RequestWindow,                    "RequestWindow" },
 164     { ResetCard,                        "ResetCard" },
 165     { SetEventMask,                     "SetEventMask" },
 166     { ValidateCIS,                      "ValidateCIS" },
 167     { WriteMemory,                      "WriteMemory" },
 168     { BindDevice,                       "BindDevice" },
 169     { BindMTD,                          "BindMTD" },
 170     { ReportError,                      "ReportError" },
 171     { SuspendCard,                      "SuspendCard" },
 172     { ResumeCard,                       "ResumeCard" },
 173     { EjectCard,                        "EjectCard" },
 174     { InsertCard,                       "InsertCard" },
 175     { ReplaceCIS,                       "ReplaceCIS" }
 176 };
 177
 178
 179 static int pcmcia_report_error(client_handle_t handle, error_info_t *err)
 180 {
 181         int i;
 182         char *serv;
 183
 184         if (CHECK_HANDLE(handle))
 185                 printk(KERN_NOTICE);
 186         else {
 187                 struct pcmcia_device *p_dev = handle_to_pdev(handle);
 188                 printk(KERN_NOTICE "%s: ", p_dev->dev.bus_id);
 189         }
 190
 191         for (i = 0; i < ARRAY_SIZE(service_table); i++)
 192                 if (service_table[i].key == err->func)
 193                         break;
 194         if (i < ARRAY_SIZE(service_table))
 195                 serv = service_table[i].msg;
 196         else
 197                 serv = "Unknown service number";
 198
 199         for (i = 0; i < ARRAY_SIZE(error_table); i++)
 200                 if (error_table[i].key == err->retcode)
 201                         break;
 202         if (i < ARRAY_SIZE(error_table))
 203                 printk("%s: %s\n", serv, error_table[i].msg);
 204         else
 205                 printk("%s: Unknown error code %#x\n", serv, err->retcode);
 206
 207         return CS_SUCCESS;
 208 } /* report_error */
 209
 210 /* end of code which was in cs.c before */
 211
 212 /*======================================================================*/
 213
 214 void cs_error(client_handle_t handle, int func, int ret)
 215 {
 216         error_info_t err = { func, ret };
 217         pcmcia_report_error(handle, &err);
 218 }
 219 EXPORT_SYMBOL(cs_error);
 220
 221
 222 static void pcmcia_check_driver(struct pcmcia_driver *p_drv)
 223 {
 224         struct pcmcia_device_id *did = p_drv->id_table;
 225         unsigned int i;
 226         u32 hash;
 227
 228         while (did && did->match_flags) {
 229                 for (i=0; i<4; i++) {
 230                         if (!did->prod_id[i])
 231                                 continue;
 232
 233                         hash = crc32(0, did->prod_id[i], strlen(did->prod_id[i]));
 234                         if (hash == did->prod_id_hash[i])
 235                                 continue;
 236
 237                         printk(KERN_DEBUG "pcmcia: %s: invalid hash for "
 238                                "product string \"%s\": is 0x%x, should "
 239                                "be 0x%x\n", p_drv->drv.name, did->prod_id[i],
 240                                did->prod_id_hash[i], hash);
 241                         printk(KERN_DEBUG "pcmcia: see "
 242                                 "Documentation/pcmcia/devicetable.txt for "
 243                                 "details\n");
 244                 }
 245                 did++;
 246         }
 247
 248         return;
 249 }
 250
 251
 252 #ifdef CONFIG_PCMCIA_LOAD_CIS
 253
 254 /**
 255  * pcmcia_load_firmware - load CIS from userspace if device-provided is broken
 256  * @dev - the pcmcia device which needs a CIS override
 257  * @filename - requested filename in /lib/firmware/cis/
 258  *
 259  * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if
 260  * the one provided by the card is broken. The firmware files reside in
 261  * /lib/firmware/cis/ in userspace.
 262  */
 263 static int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
 264 {
 265         struct pcmcia_socket *s = dev->socket;
 266         const struct firmware *fw;
 267         char path[20];
 268         int ret=-ENOMEM;
 269         cisdump_t *cis;
 270
 271         if (!filename)
 272                 return -EINVAL;
 273
 274         ds_dbg(1, "trying to load firmware %s\n", filename);
 275
 276         if (strlen(filename) > 14)
 277                 return -EINVAL;
 278
 279         snprintf(path, 20, "%s", filename);
 280
 281         if (request_firmware(&fw, path, &dev->dev) == 0) {
 282                 if (fw->size >= CISTPL_MAX_CIS_SIZE)
 283                         goto release;
 284
 285                 cis = kmalloc(sizeof(cisdump_t), GFP_KERNEL);
 286                 if (!cis)
 287                         goto release;
 288
 289                 memset(cis, 0, sizeof(cisdump_t));
 290
 291                 cis->Length = fw->size + 1;
 292                 memcpy(cis->Data, fw->data, fw->size);
 293
 294                 if (!pcmcia_replace_cis(s, cis))
 295                         ret = 0;
 296         }
 297  release:
 298         release_firmware(fw);
 299
 300         return (ret);
 301 }
 302
 303 #else /* !CONFIG_PCMCIA_LOAD_CIS */
 304
 305 static inline int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
 306 {
 307         return -ENODEV;
 308 }
 309
 310 #endif
 311
 312
 313 /*======================================================================*/
 314
 315
 316 /**
 317  * pcmcia_register_driver - register a PCMCIA driver with the bus core
 318  *
 319  * Registers a PCMCIA driver with the PCMCIA bus core.
 320  */
 321 static int pcmcia_device_probe(struct device *dev);
 322 static int pcmcia_device_remove(struct device * dev);
 323
 324 int pcmcia_register_driver(struct pcmcia_driver *driver)
 325 {
 326         if (!driver)
 327                 return -EINVAL;
 328
 329         pcmcia_check_driver(driver);
 330
 331         /* initialize common fields */
 332         driver->drv.bus = &pcmcia_bus_type;
 333         driver->drv.owner = driver->owner;
 334         driver->drv.probe = pcmcia_device_probe;
 335         driver->drv.remove = pcmcia_device_remove;
 336
 337         return driver_register(&driver->drv);
 338 }
 339 EXPORT_SYMBOL(pcmcia_register_driver);
 340
 341 /**
 342  * pcmcia_unregister_driver - unregister a PCMCIA driver with the bus core
 343  */
 344 void pcmcia_unregister_driver(struct pcmcia_driver *driver)
 345 {
 346         driver_unregister(&driver->drv);
 347 }
 348 EXPORT_SYMBOL(pcmcia_unregister_driver);
 349
 350
 351 /* pcmcia_device handling */
 352
 353 struct pcmcia_device * pcmcia_get_dev(struct pcmcia_device *p_dev)
 354 {
 355         struct device *tmp_dev;
 356         tmp_dev = get_device(&p_dev->dev);
 357         if (!tmp_dev)
 358                 return NULL;
 359         return to_pcmcia_dev(tmp_dev);
 360 }
 361
 362 void pcmcia_put_dev(struct pcmcia_device *p_dev)
 363 {
 364         if (p_dev)
 365                 put_device(&p_dev->dev);
 366 }
 367
 368 static void pcmcia_release_dev(struct device *dev)
 369 {
 370         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 371         ds_dbg(1, "releasing dev %p\n", p_dev);
 372         pcmcia_put_socket(p_dev->socket);
 373         kfree(p_dev);
 374 }
 375
 376
 377 static int pcmcia_device_probe(struct device * dev)
 378 {
 379         struct pcmcia_device *p_dev;
 380         struct pcmcia_driver *p_drv;
 381         int ret = 0;
 382
 383         dev = get_device(dev);
 384         if (!dev)
 385                 return -ENODEV;
 386
 387         p_dev = to_pcmcia_dev(dev);
 388         p_drv = to_pcmcia_drv(dev->driver);
 389
 390         if (!try_module_get(p_drv->owner)) {
 391                 ret = -EINVAL;
 392                 goto put_dev;
 393         }
 394
 395         if (p_drv->attach) {
 396                 p_dev->instance = p_drv->attach();
 397                 if ((!p_dev->instance) || (p_dev->client.state & CLIENT_UNBOUND)) {
 398                         printk(KERN_NOTICE "ds: unable to create instance "
 399                                "of '%s'!\n", p_drv->drv.name);
 400                         ret = -EINVAL;
 401                 }
 402         }
 403
 404         if (ret)
 405                 module_put(p_drv->owner);
 406  put_dev:
 407         if ((ret) || !(p_drv->attach))
 408                 put_device(dev);
 409         return (ret);
 410 }
 411
 412
 413 static int pcmcia_device_remove(struct device * dev)
 414 {
 415         struct pcmcia_device *p_dev;
 416         struct pcmcia_driver *p_drv;
 417
 418         /* detach the "instance" */
 419         p_dev = to_pcmcia_dev(dev);
 420         p_drv = to_pcmcia_drv(dev->driver);
 421
 422         if (p_drv) {
 423                 if ((p_drv->detach) && (p_dev->instance)) {
 424                         p_drv->detach(p_dev->instance);
 425                         /* from pcmcia_probe_device */
 426                         put_device(&p_dev->dev);
 427                 }
 428                 module_put(p_drv->owner);
 429         }
 430
 431         return 0;
 432 }
 433
 434
 435
 436 /*
 437  * pcmcia_device_query -- determine information about a pcmcia device
 438  */
 439 static int pcmcia_device_query(struct pcmcia_device *p_dev)
 440 {
 441         cistpl_manfid_t manf_id;
 442         cistpl_funcid_t func_id;
 443         cistpl_vers_1_t vers1;
 444         unsigned int i;
 445
 446         if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 447                                CISTPL_MANFID, &manf_id)) {
 448                 p_dev->manf_id = manf_id.manf;
 449                 p_dev->card_id = manf_id.card;
 450                 p_dev->has_manf_id = 1;
 451                 p_dev->has_card_id = 1;
 452         }
 453
 454         if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 455                                CISTPL_FUNCID, &func_id)) {
 456                 p_dev->func_id = func_id.func;
 457                 p_dev->has_func_id = 1;
 458         } else {
 459                 /* rule of thumb: cards with no FUNCID, but with
 460                  * common memory device geometry information, are
 461                  * probably memory cards (from pcmcia-cs) */
 462                 cistpl_device_geo_t devgeo;
 463                 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 464                                       CISTPL_DEVICE_GEO, &devgeo)) {
 465                         ds_dbg(0, "mem device geometry probably means "
 466                                "FUNCID_MEMORY\n");
 467                         p_dev->func_id = CISTPL_FUNCID_MEMORY;
 468                         p_dev->has_func_id = 1;
 469                 }
 470         }
 471
 472         if (!pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_VERS_1,
 473                                &vers1)) {
 474                 for (i=0; i < vers1.ns; i++) {
 475                         char *tmp;
 476                         unsigned int length;
 477
 478                         tmp = vers1.str + vers1.ofs[i];
 479
 480                         length = strlen(tmp) + 1;
 481                         if ((length < 3) || (length > 255))
 482                                 continue;
 483
 484                         p_dev->prod_id[i] = kmalloc(sizeof(char) * length,
 485                                                     GFP_KERNEL);
 486                         if (!p_dev->prod_id[i])
 487                                 continue;
 488
 489                         p_dev->prod_id[i] = strncpy(p_dev->prod_id[i],
 490                                                     tmp, length);
 491                 }
 492         }
 493
 494         return 0;
 495 }
 496
 497
 498 /* device_add_lock is needed to avoid double registration by cardmgr and kernel.
 499  * Serializes pcmcia_device_add; will most likely be removed in future.
 500  *
 501  * While it has the caveat that adding new PCMCIA devices inside(!) device_register()
 502  * won't work, this doesn't matter much at the moment: the driver core doesn't
 503  * support it either.
 504  */
 505 static DECLARE_MUTEX(device_add_lock);
 506
 507 struct pcmcia_device * pcmcia_device_add(struct pcmcia_socket *s, unsigned int function)
 508 {
 509         struct pcmcia_device *p_dev;
 510         unsigned long flags;
 511
 512         s = pcmcia_get_socket(s);
 513         if (!s)
 514                 return NULL;
 515
 516         down(&device_add_lock);
 517
 518         /* max of 2 devices per card */
 519         if (s->device_count == 2)
 520                 goto err_put;
 521
 522         p_dev = kmalloc(sizeof(struct pcmcia_device), GFP_KERNEL);
 523         if (!p_dev)
 524                 goto err_put;
 525         memset(p_dev, 0, sizeof(struct pcmcia_device));
 526
 527         p_dev->socket = s;
 528         p_dev->device_no = (s->device_count++);
 529         p_dev->func   = function;
 530
 531         p_dev->dev.bus = &pcmcia_bus_type;
 532         p_dev->dev.parent = s->dev.dev;
 533         p_dev->dev.release = pcmcia_release_dev;
 534         sprintf (p_dev->dev.bus_id, "%d.%d", p_dev->socket->sock, p_dev->device_no);
 535
 536         /* compat */
 537         p_dev->client.client_magic = CLIENT_MAGIC;
 538         p_dev->client.Socket = s;
 539         p_dev->client.Function = function;
 540         p_dev->client.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);
 563         s->device_count--;
 564  err_put:
 565         up(&device_add_lock);
 566         pcmcia_put_socket(s);
 567
 568         return NULL;
 569 }
 570
 571
 572 static int pcmcia_card_add(struct pcmcia_socket *s)
 573 {
 574         cisinfo_t cisinfo;
 575         cistpl_longlink_mfc_t mfc;
 576         unsigned int no_funcs, i;
 577         int ret = 0;
 578
 579         if (!(s->resource_setup_done))
 580                 return -EAGAIN; /* try again, but later... */
 581
 582         pcmcia_validate_mem(s);
 583         ret = pccard_validate_cis(s, BIND_FN_ALL, &cisinfo);
 584         if (ret || !cisinfo.Chains) {
 585                 ds_dbg(0, "invalid CIS or invalid resources\n");
 586                 return -ENODEV;
 587         }
 588
 589         if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
 590                 no_funcs = mfc.nfn;
 591         else
 592                 no_funcs = 1;
 593
 594         /* this doesn't handle multifunction devices on one pcmcia function
 595          * yet. */
 596         for (i=0; i < no_funcs; i++)
 597                 pcmcia_device_add(s, i);
 598
 599         return (ret);
 600 }
 601
 602
 603 static void pcmcia_delayed_add_pseudo_device(void *data)
 604 {
 605         struct pcmcia_socket *s = data;
 606         pcmcia_device_add(s, 0);
 607         s->pcmcia_state.device_add_pending = 0;
 608 }
 609
 610 static inline void pcmcia_add_pseudo_device(struct pcmcia_socket *s)
 611 {
 612         if (!s->pcmcia_state.device_add_pending) {
 613                 schedule_work(&s->device_add);
 614                 s->pcmcia_state.device_add_pending = 1;
 615         }
 616         return;
 617 }
 618
 619 static int pcmcia_requery(struct device *dev, void * _data)
 620 {
 621         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 622         if (!p_dev->dev.driver)
 623                 pcmcia_device_query(p_dev);
 624
 625         return 0;
 626 }
 627
 628 static void pcmcia_bus_rescan(struct pcmcia_socket *skt)
 629 {
 630         int no_devices=0;
 631         unsigned long flags;
 632
 633         /* must be called with skt_sem held */
 634         spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 635         if (list_empty(&skt->devices_list))
 636                 no_devices=1;
 637         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 638
 639         /* if no devices were added for this socket yet because of
 640          * missing resource information or other trouble, we need to
 641          * do this now. */
 642         if (no_devices) {
 643                 int ret = pcmcia_card_add(skt);
 644                 if (ret)
 645                         return;
 646         }
 647
 648         /* some device information might have changed because of a CIS
 649          * update or because we can finally read it correctly... so
 650          * determine it again, overwriting old values if necessary. */
 651         bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery);
 652
 653         /* we re-scan all devices, not just the ones connected to this
 654          * socket. This does not matter, though. */
 655         bus_rescan_devices(&pcmcia_bus_type);
 656 }
 657
 658 static inline int pcmcia_devmatch(struct pcmcia_device *dev,
 659                                   struct pcmcia_device_id *did)
 660 {
 661         if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
 662                 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
 663                         return 0;
 664         }
 665
 666         if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
 667                 if ((!dev->has_card_id) || (dev->card_id != did->card_id))
 668                         return 0;
 669         }
 670
 671         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
 672                 if (dev->func != did->function)
 673                         return 0;
 674         }
 675
 676         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
 677                 if (!dev->prod_id[0])
 678                         return 0;
 679                 if (strcmp(did->prod_id[0], dev->prod_id[0]))
 680                         return 0;
 681         }
 682
 683         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
 684                 if (!dev->prod_id[1])
 685                         return 0;
 686                 if (strcmp(did->prod_id[1], dev->prod_id[1]))
 687                         return 0;
 688         }
 689
 690         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
 691                 if (!dev->prod_id[2])
 692                         return 0;
 693                 if (strcmp(did->prod_id[2], dev->prod_id[2]))
 694                         return 0;
 695         }
 696
 697         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
 698                 if (!dev->prod_id[3])
 699                         return 0;
 700                 if (strcmp(did->prod_id[3], dev->prod_id[3]))
 701                         return 0;
 702         }
 703
 704         if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
 705                 /* handle pseudo multifunction devices:
 706                  * there are at most two pseudo multifunction devices.
 707                  * if we're matching against the first, schedule a
 708                  * call which will then check whether there are two
 709                  * pseudo devices, and if not, add the second one.
 710                  */
 711                 if (dev->device_no == 0)
 712                         pcmcia_add_pseudo_device(dev->socket);
 713
 714                 if (dev->device_no != did->device_no)
 715                         return 0;
 716         }
 717
 718         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
 719                 if ((!dev->has_func_id) || (dev->func_id != did->func_id))
 720                         return 0;
 721
 722                 /* if this is a pseudo-multi-function device,
 723                  * we need explicit matches */
 724                 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO)
 725                         return 0;
 726                 if (dev->device_no)
 727                         return 0;
 728
 729                 /* also, FUNC_ID matching needs to be activated by userspace
 730                  * after it has re-checked that there is no possible module
 731                  * with a prod_id/manf_id/card_id match.
 732                  */
 733                 if (!dev->allow_func_id_match)
 734                         return 0;
 735         }
 736
 737         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
 738                 if (!dev->socket->fake_cis)
 739                         pcmcia_load_firmware(dev, did->cisfile);
 740
 741                 if (!dev->socket->fake_cis)
 742                         return 0;
 743         }
 744
 745         if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
 746                 int i;
 747                 for (i=0; i<4; i++)
 748                         if (dev->prod_id[i])
 749                                 return 0;
 750                 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
 751                         return 0;
 752         }
 753
 754         dev->dev.driver_data = (void *) did;
 755
 756         return 1;
 757 }
 758
 759
 760 static int pcmcia_bus_match(struct device * dev, struct device_driver * drv) {
 761         struct pcmcia_device * p_dev = to_pcmcia_dev(dev);
 762         struct pcmcia_driver * p_drv = to_pcmcia_drv(drv);
 763         struct pcmcia_device_id *did = p_drv->id_table;
 764
 765         /* matching by cardmgr */
 766         if (p_dev->cardmgr == p_drv)
 767                 return 1;
 768
 769         while (did && did->match_flags) {
 770                 if (pcmcia_devmatch(p_dev, did))
 771                         return 1;
 772                 did++;
 773         }
 774
 775         return 0;
 776 }
 777
 778 #ifdef CONFIG_HOTPLUG
 779
 780 static int pcmcia_bus_hotplug(struct device *dev, char **envp, int num_envp,
 781                               char *buffer, int buffer_size)
 782 {
 783         struct pcmcia_device *p_dev;
 784         int i, length = 0;
 785         u32 hash[4] = { 0, 0, 0, 0};
 786
 787         if (!dev)
 788                 return -ENODEV;
 789
 790         p_dev = to_pcmcia_dev(dev);
 791
 792         /* calculate hashes */
 793         for (i=0; i<4; i++) {
 794                 if (!p_dev->prod_id[i])
 795                         continue;
 796                 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
 797         }
 798
 799         i = 0;
 800
 801         if (add_hotplug_env_var(envp, num_envp, &i,
 802                                 buffer, buffer_size, &length,
 803                                 "SOCKET_NO=%u",
 804                                 p_dev->socket->sock))
 805                 return -ENOMEM;
 806
 807         if (add_hotplug_env_var(envp, num_envp, &i,
 808                                 buffer, buffer_size, &length,
 809                                 "DEVICE_NO=%02X",
 810                                 p_dev->device_no))
 811                 return -ENOMEM;
 812
 813         if (add_hotplug_env_var(envp, num_envp, &i,
 814                                 buffer, buffer_size, &length,
 815                                 "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
 816                                 "pa%08Xpb%08Xpc%08Xpd%08X",
 817                                 p_dev->has_manf_id ? p_dev->manf_id : 0,
 818                                 p_dev->has_card_id ? p_dev->card_id : 0,
 819                                 p_dev->has_func_id ? p_dev->func_id : 0,
 820                                 p_dev->func,
 821                                 p_dev->device_no,
 822                                 hash[0],
 823                                 hash[1],
 824                                 hash[2],
 825                                 hash[3]))
 826                 return -ENOMEM;
 827
 828         envp[i] = NULL;
 829
 830         return 0;
 831 }
 832
 833 #else
 834
 835 static int pcmcia_bus_hotplug(struct device *dev, char **envp, int num_envp,
 836                               char *buffer, int buffer_size)
 837 {
 838         return -ENODEV;
 839 }
 840
 841 #endif
 842
 843 /************************ per-device sysfs output ***************************/
 844
 845 #define pcmcia_device_attr(field, test, format)                         \
 846 static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf)              \
 847 {                                                                       \
 848         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);               \
 849         return p_dev->test ? sprintf (buf, format, p_dev->field) : -ENODEV; \
 850 }
 851
 852 #define pcmcia_device_stringattr(name, field)                                   \
 853 static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf)               \
 854 {                                                                       \
 855         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);               \
 856         return p_dev->field ? sprintf (buf, "%s\n", p_dev->field) : -ENODEV; \
 857 }
 858
 859 pcmcia_device_attr(func, socket, "0x%02x\n");
 860 pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
 861 pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
 862 pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
 863 pcmcia_device_stringattr(prod_id1, prod_id[0]);
 864 pcmcia_device_stringattr(prod_id2, prod_id[1]);
 865 pcmcia_device_stringattr(prod_id3, prod_id[2]);
 866 pcmcia_device_stringattr(prod_id4, prod_id[3]);
 867
 868
 869 static ssize_t pcmcia_store_allow_func_id_match (struct device * dev, struct device_attribute *attr,
 870                                                  const char * buf, size_t count)
 871 {
 872         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 873         if (!count)
 874                 return -EINVAL;
 875
 876         down(&p_dev->socket->skt_sem);
 877         p_dev->allow_func_id_match = 1;
 878         up(&p_dev->socket->skt_sem);
 879
 880         bus_rescan_devices(&pcmcia_bus_type);
 881
 882         return count;
 883 }
 884
 885 static struct device_attribute pcmcia_dev_attrs[] = {
 886         __ATTR(function, 0444, func_show, NULL),
 887         __ATTR_RO(func_id),
 888         __ATTR_RO(manf_id),
 889         __ATTR_RO(card_id),
 890         __ATTR_RO(prod_id1),
 891         __ATTR_RO(prod_id2),
 892         __ATTR_RO(prod_id3),
 893         __ATTR_RO(prod_id4),
 894         __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match),
 895         __ATTR_NULL,
 896 };
 897
 898
 899 /*======================================================================
 900
 901     The card status event handler.
 902
 903 ======================================================================*/
 904
 905 struct send_event_data {
 906         struct pcmcia_socket *skt;
 907         event_t event;
 908         int priority;
 909 };
 910
 911 static int send_event_callback(struct device *dev, void * _data)
 912 {
 913         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 914         struct send_event_data *data = _data;
 915
 916         /* we get called for all sockets, but may only pass the event
 917          * for drivers _on the affected socket_ */
 918         if (p_dev->socket != data->skt)
 919                 return 0;
 920
 921         if (p_dev->client.state & (CLIENT_UNBOUND|CLIENT_STALE))
 922                 return 0;
 923
 924         if (p_dev->client.EventMask & data->event)
 925                 return EVENT(&p_dev->client, data->event, data->priority);
 926
 927         return 0;
 928 }
 929
 930 static int send_event(struct pcmcia_socket *s, event_t event, int priority)
 931 {
 932         struct send_event_data private;
 933
 934         private.skt = s;
 935         private.event = event;
 936         private.priority = priority;
 937
 938         return bus_for_each_dev(&pcmcia_bus_type, NULL, &private, send_event_callback);
 939 } /* send_event */
 940
 941
 942 /* Normally, the event is passed to individual drivers after
 943  * informing userspace. Only for CS_EVENT_CARD_REMOVAL this
 944  * is inversed to maintain historic compatibility.
 945  */
 946
 947 static int ds_event(struct pcmcia_socket *skt, event_t event, int priority)
 948 {
 949         struct pcmcia_socket *s = pcmcia_get_socket(skt);
 950         int ret = 0;
 951
 952         ds_dbg(1, "ds_event(0x%06x, %d, 0x%p)\n",
 953                event, priority, skt);
 954
 955         switch (event) {
 956
 957         case CS_EVENT_CARD_REMOVAL:
 958                 s->pcmcia_state.present = 0;
 959                 send_event(skt, event, priority);
 960                 unbind_request(skt);
 961                 handle_event(skt, event);
 962                 break;
 963
 964         case CS_EVENT_CARD_INSERTION:
 965                 s->pcmcia_state.present = 1;
 966                 pcmcia_card_add(skt);
 967                 handle_event(skt, event);
 968                 break;
 969
 970         case CS_EVENT_EJECTION_REQUEST:
 971                 ret = send_event(skt, event, priority);
 972                 break;
 973
 974         default:
 975                 handle_event(skt, event);
 976                 send_event(skt, event, priority);
 977                 break;
 978     }
 979
 980     pcmcia_put_socket(s);
 981
 982     return 0;
 983 } /* ds_event */
 984
 985
 986
 987 int pcmcia_register_client(client_handle_t *handle, client_reg_t *req)
 988 {
 989         client_t *client = NULL;
 990         struct pcmcia_socket *s = NULL;
 991         struct pcmcia_device *p_dev = NULL;
 992
 993         /* Look for unbound client with matching dev_info */
 994         down_read(&pcmcia_socket_list_rwsem);
 995         list_for_each_entry(s, &pcmcia_socket_list, socket_list) {
 996                 unsigned long flags;
 997
 998                 if (s->state & SOCKET_CARDBUS)
 999                         continue;
1000
1001                 s = pcmcia_get_socket(s);
1002                 if (!s)
1003                         continue;
1004                 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
1005                 list_for_each_entry(p_dev, &s->devices_list, socket_device_list) {
1006                         struct pcmcia_driver *p_drv;
1007                         p_dev = pcmcia_get_dev(p_dev);
1008                         if (!p_dev)
1009                                 continue;
1010                         if (!(p_dev->client.state & CLIENT_UNBOUND) ||
1011                             (!p_dev->dev.driver)) {
1012                                 pcmcia_put_dev(p_dev);
1013                                 continue;
1014                         }
1015                         p_drv = to_pcmcia_drv(p_dev->dev.driver);
1016                         if (!strncmp(p_drv->drv.name, (char *)req->dev_info, DEV_NAME_LEN)) {
1017                                 client = &p_dev->client;
1018                                 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
1019                                 goto found;
1020                         }
1021                         pcmcia_put_dev(p_dev);
1022                 }
1023                 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
1024                 pcmcia_put_socket(s);
1025         }
1026  found:
1027         up_read(&pcmcia_socket_list_rwsem);
1028         if (!p_dev || !client)
1029                 return -ENODEV;
1030
1031         pcmcia_put_socket(s); /* safe, as we already hold a reference from bind_device */
1032
1033         *handle = client;
1034         client->state &= ~CLIENT_UNBOUND;
1035         client->Socket = s;
1036         client->EventMask = req->EventMask;
1037         client->event_handler = req->event_handler;
1038         client->event_callback_args = req->event_callback_args;
1039         client->event_callback_args.client_handle = client;
1040
1041         if (s->state & SOCKET_CARDBUS)
1042                 client->state |= CLIENT_CARDBUS;
1043
1044         if ((!(s->state & SOCKET_CARDBUS)) && (s->functions == 0) &&
1045             (client->Function != BIND_FN_ALL)) {
1046                 cistpl_longlink_mfc_t mfc;
1047                 if (pccard_read_tuple(s, client->Function, CISTPL_LONGLINK_MFC, &mfc)
1048                     == CS_SUCCESS)
1049                         s->functions = mfc.nfn;
1050                 else
1051                         s->functions = 1;
1052                 s->config = kmalloc(sizeof(config_t) * s->functions,
1053                                     GFP_KERNEL);
1054                 if (!s->config)
1055                         goto out_no_resource;
1056                 memset(s->config, 0, sizeof(config_t) * s->functions);
1057         }
1058
1059         ds_dbg(1, "register_client(): client 0x%p, dev %s\n",
1060                client, p_dev->dev.bus_id);
1061         if (client->EventMask & CS_EVENT_REGISTRATION_COMPLETE)
1062                 EVENT(client, CS_EVENT_REGISTRATION_COMPLETE, CS_EVENT_PRI_LOW);
1063
1064         if ((s->state & (SOCKET_PRESENT|SOCKET_CARDBUS)) == SOCKET_PRESENT) {
1065                 if (client->EventMask & CS_EVENT_CARD_INSERTION)
1066                         EVENT(client, CS_EVENT_CARD_INSERTION, CS_EVENT_PRI_LOW);
1067         }
1068
1069         return CS_SUCCESS;
1070
1071  out_no_resource:
1072         pcmcia_put_dev(p_dev);
1073         return CS_OUT_OF_RESOURCE;
1074 } /* register_client */
1075 EXPORT_SYMBOL(pcmcia_register_client);
1076
1077
1078 /* unbind _all_ devices attached to a given pcmcia_bus_socket. The
1079  * drivers have been called with EVENT_CARD_REMOVAL before.
1080  */
1081 static int unbind_request(struct pcmcia_socket *s)
1082 {
1083         struct pcmcia_device    *p_dev;
1084         unsigned long           flags;
1085
1086         ds_dbg(2, "unbind_request(%d)\n", s->sock);
1087
1088         s->device_count = 0;
1089
1090         for (;;) {
1091                 /* unregister all pcmcia_devices registered with this socket*/
1092                 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
1093                 if (list_empty(&s->devices_list)) {
1094                         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
1095                         return 0;
1096                 }
1097                 p_dev = list_entry((&s->devices_list)->next, struct pcmcia_device, socket_device_list);
1098                 list_del(&p_dev->socket_device_list);
1099                 p_dev->client.state |= CLIENT_STALE;
1100                 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
1101
1102                 device_unregister(&p_dev->dev);
1103         }
1104
1105         return 0;
1106 } /* unbind_request */
1107
1108 int pcmcia_deregister_client(client_handle_t handle)
1109 {
1110         struct pcmcia_socket *s;
1111         int i;
1112         struct pcmcia_device *p_dev = handle_to_pdev(handle);
1113
1114         if (CHECK_HANDLE(handle))
1115                 return CS_BAD_HANDLE;
1116
1117         s = SOCKET(handle);
1118         ds_dbg(1, "deregister_client(%p)\n", handle);
1119
1120         if (handle->state & (CLIENT_IRQ_REQ|CLIENT_IO_REQ|CLIENT_CONFIG_LOCKED))
1121                 goto warn_out;
1122         for (i = 0; i < MAX_WIN; i++)
1123                 if (handle->state & CLIENT_WIN_REQ(i))
1124                         goto warn_out;
1125
1126         if (handle->state & CLIENT_STALE) {
1127                 handle->client_magic = 0;
1128                 handle->state &= ~CLIENT_STALE;
1129                 pcmcia_put_dev(p_dev);
1130         } else {
1131                 handle->state = CLIENT_UNBOUND;
1132                 handle->event_handler = NULL;
1133         }
1134
1135         return CS_SUCCESS;
1136  warn_out:
1137         printk(KERN_WARNING "ds: deregister_client was called too early.\n");
1138         return CS_IN_USE;
1139 } /* deregister_client */
1140 EXPORT_SYMBOL(pcmcia_deregister_client);
1141
1142 static struct pcmcia_callback pcmcia_bus_callback = {
1143         .owner = THIS_MODULE,
1144         .event = ds_event,
1145         .requery = pcmcia_bus_rescan,
1146 };
1147
1148 static int __devinit pcmcia_bus_add_socket(struct class_device *class_dev)
1149 {
1150         struct pcmcia_socket *socket = class_get_devdata(class_dev);
1151         int ret;
1152
1153         socket = pcmcia_get_socket(socket);
1154         if (!socket) {
1155                 printk(KERN_ERR "PCMCIA obtaining reference to socket %p failed\n", socket);
1156                 return -ENODEV;
1157         }
1158
1159         /*
1160          * Ugly. But we want to wait for the socket threads to have started up.
1161          * We really should let the drivers themselves drive some of this..
1162          */
1163         msleep(250);
1164
1165 #ifdef CONFIG_PCMCIA_IOCTL
1166         init_waitqueue_head(&socket->queue);
1167 #endif
1168         INIT_LIST_HEAD(&socket->devices_list);
1169         INIT_WORK(&socket->device_add, pcmcia_delayed_add_pseudo_device, socket);
1170         memset(&socket->pcmcia_state, 0, sizeof(u8));
1171         socket->device_count = 0;
1172
1173         ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback);
1174         if (ret) {
1175                 printk(KERN_ERR "PCMCIA registration PCCard core failed for socket %p\n", socket);
1176                 pcmcia_put_socket(socket);
1177                 return (ret);
1178         }
1179
1180         return 0;
1181 }
1182
1183 static void pcmcia_bus_remove_socket(struct class_device *class_dev)
1184 {
1185         struct pcmcia_socket *socket = class_get_devdata(class_dev);
1186
1187         if (!socket)
1188                 return;
1189
1190         socket->pcmcia_state.dead = 1;
1191         pccard_register_pcmcia(socket, NULL);
1192
1193         pcmcia_put_socket(socket);
1194
1195         return;
1196 }
1197
1198
1199 /* the pcmcia_bus_interface is used to handle pcmcia socket devices */
1200 static struct class_interface pcmcia_bus_interface = {
1201         .class = &pcmcia_socket_class,
1202         .add = &pcmcia_bus_add_socket,
1203         .remove = &pcmcia_bus_remove_socket,
1204 };
1205
1206
1207 struct bus_type pcmcia_bus_type = {
1208         .name = "pcmcia",
1209         .hotplug = pcmcia_bus_hotplug,
1210         .match = pcmcia_bus_match,
1211         .dev_attrs = pcmcia_dev_attrs,
1212 };
1213
1214
1215 static int __init init_pcmcia_bus(void)
1216 {
1217         spin_lock_init(&pcmcia_dev_list_lock);
1218
1219         bus_register(&pcmcia_bus_type);
1220         class_interface_register(&pcmcia_bus_interface);
1221
1222         pcmcia_setup_ioctl();
1223
1224         return 0;
1225 }
1226 fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that
1227                                * pcmcia_socket_class is already registered */
1228
1229
1230 static void __exit exit_pcmcia_bus(void)
1231 {
1232         pcmcia_cleanup_ioctl();
1233
1234         class_interface_unregister(&pcmcia_bus_interface);
1235
1236         bus_unregister(&pcmcia_bus_type);
1237 }
1238 module_exit(exit_pcmcia_bus);
1239
1240
1241 MODULE_ALIAS("ds");