SAFE public projects git trees. - safe/jmp/linux-2.6/blob - drivers/pcmcia/ds.c

   1 /*
   2  * ds.c -- 16-bit PCMCIA core support
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2 as
   6  * published by the Free Software Foundation.
   7  *
   8  * The initial developer of the original code is David A. Hinds
   9  * <dahinds@users.sourceforge.net>.  Portions created by David A. Hinds
  10  * are Copyright (C) 1999 David A. Hinds.  All Rights Reserved.
  11  *
  12  * (C) 1999             David A. Hinds
  13  * (C) 2003 - 2006      Dominik Brodowski
  14  */
  15
  16 #include <linux/kernel.h>
  17 #include <linux/module.h>
  18 #include <linux/init.h>
  19 #include <linux/errno.h>
  20 #include <linux/list.h>
  21 #include <linux/delay.h>
  22 #include <linux/workqueue.h>
  23 #include <linux/crc32.h>
  24 #include <linux/firmware.h>
  25 #include <linux/kref.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 /*====================================================================*/
  61
  62 /* code which was in cs.c before */
  63
  64 /* String tables for error messages */
  65
  66 typedef struct lookup_t {
  67     int key;
  68     char *msg;
  69 } lookup_t;
  70
  71 static const lookup_t error_table[] = {
  72     { CS_SUCCESS,               "Operation succeeded" },
  73     { CS_BAD_ADAPTER,           "Bad adapter" },
  74     { CS_BAD_ATTRIBUTE,         "Bad attribute", },
  75     { CS_BAD_BASE,              "Bad base address" },
  76     { CS_BAD_EDC,               "Bad EDC" },
  77     { CS_BAD_IRQ,               "Bad IRQ" },
  78     { CS_BAD_OFFSET,            "Bad offset" },
  79     { CS_BAD_PAGE,              "Bad page number" },
  80     { CS_READ_FAILURE,          "Read failure" },
  81     { CS_BAD_SIZE,              "Bad size" },
  82     { CS_BAD_SOCKET,            "Bad socket" },
  83     { CS_BAD_TYPE,              "Bad type" },
  84     { CS_BAD_VCC,               "Bad Vcc" },
  85     { CS_BAD_VPP,               "Bad Vpp" },
  86     { CS_BAD_WINDOW,            "Bad window" },
  87     { CS_WRITE_FAILURE,         "Write failure" },
  88     { CS_NO_CARD,               "No card present" },
  89     { CS_UNSUPPORTED_FUNCTION,  "Usupported function" },
  90     { CS_UNSUPPORTED_MODE,      "Unsupported mode" },
  91     { CS_BAD_SPEED,             "Bad speed" },
  92     { CS_BUSY,                  "Resource busy" },
  93     { CS_GENERAL_FAILURE,       "General failure" },
  94     { CS_WRITE_PROTECTED,       "Write protected" },
  95     { CS_BAD_ARG_LENGTH,        "Bad argument length" },
  96     { CS_BAD_ARGS,              "Bad arguments" },
  97     { CS_CONFIGURATION_LOCKED,  "Configuration locked" },
  98     { CS_IN_USE,                "Resource in use" },
  99     { CS_NO_MORE_ITEMS,         "No more items" },
 100     { CS_OUT_OF_RESOURCE,       "Out of resource" },
 101     { CS_BAD_HANDLE,            "Bad handle" },
 102     { CS_BAD_TUPLE,             "Bad CIS tuple" }
 103 };
 104
 105
 106 static const lookup_t service_table[] = {
 107     { AccessConfigurationRegister,      "AccessConfigurationRegister" },
 108     { AddSocketServices,                "AddSocketServices" },
 109     { AdjustResourceInfo,               "AdjustResourceInfo" },
 110     { CheckEraseQueue,                  "CheckEraseQueue" },
 111     { CloseMemory,                      "CloseMemory" },
 112     { DeregisterClient,                 "DeregisterClient" },
 113     { DeregisterEraseQueue,             "DeregisterEraseQueue" },
 114     { GetCardServicesInfo,              "GetCardServicesInfo" },
 115     { GetClientInfo,                    "GetClientInfo" },
 116     { GetConfigurationInfo,             "GetConfigurationInfo" },
 117     { GetEventMask,                     "GetEventMask" },
 118     { GetFirstClient,                   "GetFirstClient" },
 119     { GetFirstRegion,                   "GetFirstRegion" },
 120     { GetFirstTuple,                    "GetFirstTuple" },
 121     { GetNextClient,                    "GetNextClient" },
 122     { GetNextRegion,                    "GetNextRegion" },
 123     { GetNextTuple,                     "GetNextTuple" },
 124     { GetStatus,                        "GetStatus" },
 125     { GetTupleData,                     "GetTupleData" },
 126     { MapMemPage,                       "MapMemPage" },
 127     { ModifyConfiguration,              "ModifyConfiguration" },
 128     { ModifyWindow,                     "ModifyWindow" },
 129     { OpenMemory,                       "OpenMemory" },
 130     { ParseTuple,                       "ParseTuple" },
 131     { ReadMemory,                       "ReadMemory" },
 132     { RegisterClient,                   "RegisterClient" },
 133     { RegisterEraseQueue,               "RegisterEraseQueue" },
 134     { RegisterMTD,                      "RegisterMTD" },
 135     { ReleaseConfiguration,             "ReleaseConfiguration" },
 136     { ReleaseIO,                        "ReleaseIO" },
 137     { ReleaseIRQ,                       "ReleaseIRQ" },
 138     { ReleaseWindow,                    "ReleaseWindow" },
 139     { RequestConfiguration,             "RequestConfiguration" },
 140     { RequestIO,                        "RequestIO" },
 141     { RequestIRQ,                       "RequestIRQ" },
 142     { RequestSocketMask,                "RequestSocketMask" },
 143     { RequestWindow,                    "RequestWindow" },
 144     { ResetCard,                        "ResetCard" },
 145     { SetEventMask,                     "SetEventMask" },
 146     { ValidateCIS,                      "ValidateCIS" },
 147     { WriteMemory,                      "WriteMemory" },
 148     { BindDevice,                       "BindDevice" },
 149     { BindMTD,                          "BindMTD" },
 150     { ReportError,                      "ReportError" },
 151     { SuspendCard,                      "SuspendCard" },
 152     { ResumeCard,                       "ResumeCard" },
 153     { EjectCard,                        "EjectCard" },
 154     { InsertCard,                       "InsertCard" },
 155     { ReplaceCIS,                       "ReplaceCIS" }
 156 };
 157
 158
 159 static int pcmcia_report_error(struct pcmcia_device *p_dev, error_info_t *err)
 160 {
 161         int i;
 162         char *serv;
 163
 164         if (!p_dev)
 165                 printk(KERN_NOTICE);
 166         else
 167                 printk(KERN_NOTICE "%s: ", p_dev->dev.bus_id);
 168
 169         for (i = 0; i < ARRAY_SIZE(service_table); i++)
 170                 if (service_table[i].key == err->func)
 171                         break;
 172         if (i < ARRAY_SIZE(service_table))
 173                 serv = service_table[i].msg;
 174         else
 175                 serv = "Unknown service number";
 176
 177         for (i = 0; i < ARRAY_SIZE(error_table); i++)
 178                 if (error_table[i].key == err->retcode)
 179                         break;
 180         if (i < ARRAY_SIZE(error_table))
 181                 printk("%s: %s\n", serv, error_table[i].msg);
 182         else
 183                 printk("%s: Unknown error code %#x\n", serv, err->retcode);
 184
 185         return CS_SUCCESS;
 186 } /* report_error */
 187
 188 /* end of code which was in cs.c before */
 189
 190 /*======================================================================*/
 191
 192 void cs_error(struct pcmcia_device *p_dev, int func, int ret)
 193 {
 194         error_info_t err = { func, ret };
 195         pcmcia_report_error(p_dev, &err);
 196 }
 197 EXPORT_SYMBOL(cs_error);
 198
 199
 200 static void pcmcia_check_driver(struct pcmcia_driver *p_drv)
 201 {
 202         struct pcmcia_device_id *did = p_drv->id_table;
 203         unsigned int i;
 204         u32 hash;
 205
 206         if (!p_drv->probe || !p_drv->remove)
 207                 printk(KERN_DEBUG "pcmcia: %s lacks a requisite callback "
 208                        "function\n", p_drv->drv.name);
 209
 210         while (did && did->match_flags) {
 211                 for (i=0; i<4; i++) {
 212                         if (!did->prod_id[i])
 213                                 continue;
 214
 215                         hash = crc32(0, did->prod_id[i], strlen(did->prod_id[i]));
 216                         if (hash == did->prod_id_hash[i])
 217                                 continue;
 218
 219                         printk(KERN_DEBUG "pcmcia: %s: invalid hash for "
 220                                "product string \"%s\": is 0x%x, should "
 221                                "be 0x%x\n", p_drv->drv.name, did->prod_id[i],
 222                                did->prod_id_hash[i], hash);
 223                         printk(KERN_DEBUG "pcmcia: see "
 224                                 "Documentation/pcmcia/devicetable.txt for "
 225                                 "details\n");
 226                 }
 227                 did++;
 228         }
 229
 230         return;
 231 }
 232
 233
 234 #ifdef CONFIG_PCMCIA_LOAD_CIS
 235
 236 /**
 237  * pcmcia_load_firmware - load CIS from userspace if device-provided is broken
 238  * @dev - the pcmcia device which needs a CIS override
 239  * @filename - requested filename in /lib/firmware/cis/
 240  *
 241  * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if
 242  * the one provided by the card is broken. The firmware files reside in
 243  * /lib/firmware/cis/ in userspace.
 244  */
 245 static int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
 246 {
 247         struct pcmcia_socket *s = dev->socket;
 248         const struct firmware *fw;
 249         char path[20];
 250         int ret=-ENOMEM;
 251         cisdump_t *cis;
 252
 253         if (!filename)
 254                 return -EINVAL;
 255
 256         ds_dbg(1, "trying to load firmware %s\n", filename);
 257
 258         if (strlen(filename) > 14)
 259                 return -EINVAL;
 260
 261         snprintf(path, 20, "%s", filename);
 262
 263         if (request_firmware(&fw, path, &dev->dev) == 0) {
 264                 if (fw->size >= CISTPL_MAX_CIS_SIZE)
 265                         goto release;
 266
 267                 cis = kzalloc(sizeof(cisdump_t), GFP_KERNEL);
 268                 if (!cis)
 269                         goto release;
 270
 271                 cis->Length = fw->size + 1;
 272                 memcpy(cis->Data, fw->data, fw->size);
 273
 274                 if (!pcmcia_replace_cis(s, cis))
 275                         ret = 0;
 276         }
 277  release:
 278         release_firmware(fw);
 279
 280         return (ret);
 281 }
 282
 283 #else /* !CONFIG_PCMCIA_LOAD_CIS */
 284
 285 static inline int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
 286 {
 287         return -ENODEV;
 288 }
 289
 290 #endif
 291
 292
 293 /*======================================================================*/
 294
 295
 296 /**
 297  * pcmcia_register_driver - register a PCMCIA driver with the bus core
 298  *
 299  * Registers a PCMCIA driver with the PCMCIA bus core.
 300  */
 301 static int pcmcia_device_probe(struct device *dev);
 302 static int pcmcia_device_remove(struct device * dev);
 303
 304 int pcmcia_register_driver(struct pcmcia_driver *driver)
 305 {
 306         if (!driver)
 307                 return -EINVAL;
 308
 309         pcmcia_check_driver(driver);
 310
 311         /* initialize common fields */
 312         driver->drv.bus = &pcmcia_bus_type;
 313         driver->drv.owner = driver->owner;
 314
 315         return driver_register(&driver->drv);
 316 }
 317 EXPORT_SYMBOL(pcmcia_register_driver);
 318
 319 /**
 320  * pcmcia_unregister_driver - unregister a PCMCIA driver with the bus core
 321  */
 322 void pcmcia_unregister_driver(struct pcmcia_driver *driver)
 323 {
 324         driver_unregister(&driver->drv);
 325 }
 326 EXPORT_SYMBOL(pcmcia_unregister_driver);
 327
 328
 329 /* pcmcia_device handling */
 330
 331 struct pcmcia_device * pcmcia_get_dev(struct pcmcia_device *p_dev)
 332 {
 333         struct device *tmp_dev;
 334         tmp_dev = get_device(&p_dev->dev);
 335         if (!tmp_dev)
 336                 return NULL;
 337         return to_pcmcia_dev(tmp_dev);
 338 }
 339
 340 void pcmcia_put_dev(struct pcmcia_device *p_dev)
 341 {
 342         if (p_dev)
 343                 put_device(&p_dev->dev);
 344 }
 345
 346 static void pcmcia_release_function(struct kref *ref)
 347 {
 348         struct config_t *c = container_of(ref, struct config_t, ref);
 349         kfree(c);
 350 }
 351
 352 static void pcmcia_release_dev(struct device *dev)
 353 {
 354         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 355         ds_dbg(1, "releasing dev %p\n", p_dev);
 356         pcmcia_put_socket(p_dev->socket);
 357         kfree(p_dev->devname);
 358         kref_put(&p_dev->function_config->ref, pcmcia_release_function);
 359         kfree(p_dev);
 360 }
 361
 362 static void pcmcia_add_pseudo_device(struct pcmcia_socket *s)
 363 {
 364         if (!s->pcmcia_state.device_add_pending) {
 365                 s->pcmcia_state.device_add_pending = 1;
 366                 schedule_work(&s->device_add);
 367         }
 368         return;
 369 }
 370
 371 static int pcmcia_device_probe(struct device * dev)
 372 {
 373         struct pcmcia_device *p_dev;
 374         struct pcmcia_driver *p_drv;
 375         struct pcmcia_device_id *did;
 376         struct pcmcia_socket *s;
 377         int ret = 0;
 378
 379         dev = get_device(dev);
 380         if (!dev)
 381                 return -ENODEV;
 382
 383         p_dev = to_pcmcia_dev(dev);
 384         p_drv = to_pcmcia_drv(dev->driver);
 385         s = p_dev->socket;
 386
 387         if ((!p_drv->probe) || (!p_dev->function_config) ||
 388             (!try_module_get(p_drv->owner))) {
 389                 ret = -EINVAL;
 390                 goto put_dev;
 391         }
 392
 393         p_dev->p_state &= ~CLIENT_UNBOUND;
 394         p_dev->handle = p_dev;
 395
 396         ret = p_drv->probe(p_dev);
 397         if (ret)
 398                 goto put_module;
 399
 400         /* handle pseudo multifunction devices:
 401          * there are at most two pseudo multifunction devices.
 402          * if we're matching against the first, schedule a
 403          * call which will then check whether there are two
 404          * pseudo devices, and if not, add the second one.
 405          */
 406         did = (struct pcmcia_device_id *) p_dev->dev.driver_data;
 407         if (did && (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) &&
 408             (p_dev->socket->device_count == 1) && (p_dev->device_no == 0))
 409                 pcmcia_add_pseudo_device(p_dev->socket);
 410
 411  put_module:
 412         if (ret)
 413                 module_put(p_drv->owner);
 414  put_dev:
 415         if (ret)
 416                 put_device(dev);
 417         return (ret);
 418 }
 419
 420
 421 static int pcmcia_device_remove(struct device * dev)
 422 {
 423         struct pcmcia_device *p_dev;
 424         struct pcmcia_driver *p_drv;
 425         int i;
 426
 427         /* detach the "instance" */
 428         p_dev = to_pcmcia_dev(dev);
 429         p_drv = to_pcmcia_drv(dev->driver);
 430         if (!p_drv)
 431                 return 0;
 432
 433         if (p_drv->remove)
 434                 p_drv->remove(p_dev);
 435
 436         /* check for proper unloading */
 437         if (p_dev->p_state & (CLIENT_IRQ_REQ|CLIENT_IO_REQ|CLIENT_CONFIG_LOCKED))
 438                 printk(KERN_INFO "pcmcia: driver %s did not release config properly\n",
 439                        p_drv->drv.name);
 440
 441         for (i = 0; i < MAX_WIN; i++)
 442                 if (p_dev->p_state & CLIENT_WIN_REQ(i))
 443                         printk(KERN_INFO "pcmcia: driver %s did not release windows properly\n",
 444                                p_drv->drv.name);
 445
 446         /* references from pcmcia_probe_device */
 447         p_dev->p_state = CLIENT_UNBOUND;
 448         pcmcia_put_dev(p_dev);
 449         module_put(p_drv->owner);
 450
 451         return 0;
 452 }
 453
 454
 455 /*
 456  * Removes a PCMCIA card from the device tree and socket list.
 457  */
 458 static void pcmcia_card_remove(struct pcmcia_socket *s)
 459 {
 460         struct pcmcia_device    *p_dev;
 461         unsigned long           flags;
 462
 463         ds_dbg(2, "unbind_request(%d)\n", s->sock);
 464
 465         s->device_count = 0;
 466
 467         for (;;) {
 468                 /* unregister all pcmcia_devices registered with this socket*/
 469                 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 470                 if (list_empty(&s->devices_list)) {
 471                         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 472                         return;
 473                 }
 474                 p_dev = list_entry((&s->devices_list)->next, struct pcmcia_device, socket_device_list);
 475                 list_del(&p_dev->socket_device_list);
 476                 p_dev->p_state |= CLIENT_STALE;
 477                 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 478
 479                 device_unregister(&p_dev->dev);
 480         }
 481
 482         return;
 483 } /* unbind_request */
 484
 485
 486 /*
 487  * pcmcia_device_query -- determine information about a pcmcia device
 488  */
 489 static int pcmcia_device_query(struct pcmcia_device *p_dev)
 490 {
 491         cistpl_manfid_t manf_id;
 492         cistpl_funcid_t func_id;
 493         cistpl_vers_1_t *vers1;
 494         unsigned int i;
 495
 496         vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL);
 497         if (!vers1)
 498                 return -ENOMEM;
 499
 500         if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 501                                CISTPL_MANFID, &manf_id)) {
 502                 p_dev->manf_id = manf_id.manf;
 503                 p_dev->card_id = manf_id.card;
 504                 p_dev->has_manf_id = 1;
 505                 p_dev->has_card_id = 1;
 506         }
 507
 508         if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 509                                CISTPL_FUNCID, &func_id)) {
 510                 p_dev->func_id = func_id.func;
 511                 p_dev->has_func_id = 1;
 512         } else {
 513                 /* rule of thumb: cards with no FUNCID, but with
 514                  * common memory device geometry information, are
 515                  * probably memory cards (from pcmcia-cs) */
 516                 cistpl_device_geo_t *devgeo;
 517
 518                 devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL);
 519                 if (!devgeo) {
 520                         kfree(vers1);
 521                         return -ENOMEM;
 522                 }
 523                 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 524                                       CISTPL_DEVICE_GEO, devgeo)) {
 525                         ds_dbg(0, "mem device geometry probably means "
 526                                "FUNCID_MEMORY\n");
 527                         p_dev->func_id = CISTPL_FUNCID_MEMORY;
 528                         p_dev->has_func_id = 1;
 529                 }
 530                 kfree(devgeo);
 531         }
 532
 533         if (!pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_VERS_1,
 534                                vers1)) {
 535                 for (i=0; i < vers1->ns; i++) {
 536                         char *tmp;
 537                         unsigned int length;
 538
 539                         tmp = vers1->str + vers1->ofs[i];
 540
 541                         length = strlen(tmp) + 1;
 542                         if ((length < 2) || (length > 255))
 543                                 continue;
 544
 545                         p_dev->prod_id[i] = kmalloc(sizeof(char) * length,
 546                                                     GFP_KERNEL);
 547                         if (!p_dev->prod_id[i])
 548                                 continue;
 549
 550                         p_dev->prod_id[i] = strncpy(p_dev->prod_id[i],
 551                                                     tmp, length);
 552                 }
 553         }
 554
 555         kfree(vers1);
 556         return 0;
 557 }
 558
 559
 560 /* device_add_lock is needed to avoid double registration by cardmgr and kernel.
 561  * Serializes pcmcia_device_add; will most likely be removed in future.
 562  *
 563  * While it has the caveat that adding new PCMCIA devices inside(!) device_register()
 564  * won't work, this doesn't matter much at the moment: the driver core doesn't
 565  * support it either.
 566  */
 567 static DEFINE_MUTEX(device_add_lock);
 568
 569 struct pcmcia_device * pcmcia_device_add(struct pcmcia_socket *s, unsigned int function)
 570 {
 571         struct pcmcia_device *p_dev, *tmp_dev;
 572         unsigned long flags;
 573         int bus_id_len;
 574
 575         s = pcmcia_get_socket(s);
 576         if (!s)
 577                 return NULL;
 578
 579         mutex_lock(&device_add_lock);
 580
 581         /* max of 2 devices per card */
 582         if (s->device_count == 2)
 583                 goto err_put;
 584
 585         p_dev = kzalloc(sizeof(struct pcmcia_device), GFP_KERNEL);
 586         if (!p_dev)
 587                 goto err_put;
 588
 589         p_dev->socket = s;
 590         p_dev->device_no = (s->device_count++);
 591         p_dev->func   = function;
 592         if (s->functions <= function)
 593                 s->functions = function + 1;
 594
 595         p_dev->dev.bus = &pcmcia_bus_type;
 596         p_dev->dev.parent = s->dev.dev;
 597         p_dev->dev.release = pcmcia_release_dev;
 598         bus_id_len = sprintf (p_dev->dev.bus_id, "%d.%d", p_dev->socket->sock, p_dev->device_no);
 599
 600         p_dev->devname = kmalloc(6 + bus_id_len + 1, GFP_KERNEL);
 601         if (!p_dev->devname)
 602                 goto err_free;
 603         sprintf (p_dev->devname, "pcmcia%s", p_dev->dev.bus_id);
 604
 605         /* compat */
 606         p_dev->p_state = CLIENT_UNBOUND;
 607
 608
 609         spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 610
 611         /*
 612          * p_dev->function_config must be the same for all card functions.
 613          * Note that this is serialized by the device_add_lock, so that
 614          * only one such struct will be created.
 615          */
 616         list_for_each_entry(tmp_dev, &s->devices_list, socket_device_list)
 617                 if (p_dev->func == tmp_dev->func) {
 618                         p_dev->function_config = tmp_dev->function_config;
 619                         kref_get(&p_dev->function_config->ref);
 620                 }
 621
 622         /* Add to the list in pcmcia_bus_socket */
 623         list_add_tail(&p_dev->socket_device_list, &s->devices_list);
 624
 625         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 626
 627         if (!p_dev->function_config) {
 628                 p_dev->function_config = kzalloc(sizeof(struct config_t),
 629                                                  GFP_KERNEL);
 630                 if (!p_dev->function_config)
 631                         goto err_unreg;
 632                 kref_init(&p_dev->function_config->ref);
 633         }
 634
 635         printk(KERN_NOTICE "pcmcia: registering new device %s\n",
 636                p_dev->devname);
 637
 638         pcmcia_device_query(p_dev);
 639
 640         if (device_register(&p_dev->dev))
 641                 goto err_unreg;
 642
 643         mutex_unlock(&device_add_lock);
 644
 645         return p_dev;
 646
 647  err_unreg:
 648         spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 649         list_del(&p_dev->socket_device_list);
 650         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 651
 652  err_free:
 653         kfree(p_dev->devname);
 654         kfree(p_dev);
 655         s->device_count--;
 656  err_put:
 657         mutex_unlock(&device_add_lock);
 658         pcmcia_put_socket(s);
 659
 660         return NULL;
 661 }
 662
 663
 664 static int pcmcia_card_add(struct pcmcia_socket *s)
 665 {
 666         cisinfo_t cisinfo;
 667         cistpl_longlink_mfc_t mfc;
 668         unsigned int no_funcs, i;
 669         int ret = 0;
 670
 671         if (!(s->resource_setup_done))
 672                 return -EAGAIN; /* try again, but later... */
 673
 674         if (pcmcia_validate_mem(s))
 675                 return -EAGAIN; /* try again, but later... */
 676
 677         ret = pccard_validate_cis(s, BIND_FN_ALL, &cisinfo);
 678         if (ret || !cisinfo.Chains) {
 679                 ds_dbg(0, "invalid CIS or invalid resources\n");
 680                 return -ENODEV;
 681         }
 682
 683         if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
 684                 no_funcs = mfc.nfn;
 685         else
 686                 no_funcs = 1;
 687
 688         for (i=0; i < no_funcs; i++)
 689                 pcmcia_device_add(s, i);
 690
 691         return (ret);
 692 }
 693
 694
 695 static void pcmcia_delayed_add_pseudo_device(void *data)
 696 {
 697         struct pcmcia_socket *s = data;
 698         pcmcia_device_add(s, 0);
 699         s->pcmcia_state.device_add_pending = 0;
 700 }
 701
 702 static int pcmcia_requery(struct device *dev, void * _data)
 703 {
 704         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 705         if (!p_dev->dev.driver)
 706                 pcmcia_device_query(p_dev);
 707
 708         return 0;
 709 }
 710
 711 static void pcmcia_bus_rescan(struct pcmcia_socket *skt)
 712 {
 713         int no_devices=0;
 714         unsigned long flags;
 715
 716         /* must be called with skt_mutex held */
 717         spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 718         if (list_empty(&skt->devices_list))
 719                 no_devices=1;
 720         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 721
 722         /* if no devices were added for this socket yet because of
 723          * missing resource information or other trouble, we need to
 724          * do this now. */
 725         if (no_devices) {
 726                 int ret = pcmcia_card_add(skt);
 727                 if (ret)
 728                         return;
 729         }
 730
 731         /* some device information might have changed because of a CIS
 732          * update or because we can finally read it correctly... so
 733          * determine it again, overwriting old values if necessary. */
 734         bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery);
 735
 736         /* we re-scan all devices, not just the ones connected to this
 737          * socket. This does not matter, though. */
 738         bus_rescan_devices(&pcmcia_bus_type);
 739 }
 740
 741 static inline int pcmcia_devmatch(struct pcmcia_device *dev,
 742                                   struct pcmcia_device_id *did)
 743 {
 744         if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
 745                 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
 746                         return 0;
 747         }
 748
 749         if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
 750                 if ((!dev->has_card_id) || (dev->card_id != did->card_id))
 751                         return 0;
 752         }
 753
 754         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
 755                 if (dev->func != did->function)
 756                         return 0;
 757         }
 758
 759         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
 760                 if (!dev->prod_id[0])
 761                         return 0;
 762                 if (strcmp(did->prod_id[0], dev->prod_id[0]))
 763                         return 0;
 764         }
 765
 766         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
 767                 if (!dev->prod_id[1])
 768                         return 0;
 769                 if (strcmp(did->prod_id[1], dev->prod_id[1]))
 770                         return 0;
 771         }
 772
 773         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
 774                 if (!dev->prod_id[2])
 775                         return 0;
 776                 if (strcmp(did->prod_id[2], dev->prod_id[2]))
 777                         return 0;
 778         }
 779
 780         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
 781                 if (!dev->prod_id[3])
 782                         return 0;
 783                 if (strcmp(did->prod_id[3], dev->prod_id[3]))
 784                         return 0;
 785         }
 786
 787         if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
 788                 if (dev->device_no != did->device_no)
 789                         return 0;
 790         }
 791
 792         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
 793                 if ((!dev->has_func_id) || (dev->func_id != did->func_id))
 794                         return 0;
 795
 796                 /* if this is a pseudo-multi-function device,
 797                  * we need explicit matches */
 798                 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO)
 799                         return 0;
 800                 if (dev->device_no)
 801                         return 0;
 802
 803                 /* also, FUNC_ID matching needs to be activated by userspace
 804                  * after it has re-checked that there is no possible module
 805                  * with a prod_id/manf_id/card_id match.
 806                  */
 807                 if (!dev->allow_func_id_match)
 808                         return 0;
 809         }
 810
 811         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
 812                 if (!dev->socket->fake_cis)
 813                         pcmcia_load_firmware(dev, did->cisfile);
 814
 815                 if (!dev->socket->fake_cis)
 816                         return 0;
 817         }
 818
 819         if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
 820                 int i;
 821                 for (i=0; i<4; i++)
 822                         if (dev->prod_id[i])
 823                                 return 0;
 824                 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
 825                         return 0;
 826         }
 827
 828         dev->dev.driver_data = (void *) did;
 829
 830         return 1;
 831 }
 832
 833
 834 static int pcmcia_bus_match(struct device * dev, struct device_driver * drv) {
 835         struct pcmcia_device * p_dev = to_pcmcia_dev(dev);
 836         struct pcmcia_driver * p_drv = to_pcmcia_drv(drv);
 837         struct pcmcia_device_id *did = p_drv->id_table;
 838
 839 #ifdef CONFIG_PCMCIA_IOCTL
 840         /* matching by cardmgr */
 841         if (p_dev->cardmgr == p_drv)
 842                 return 1;
 843 #endif
 844
 845         while (did && did->match_flags) {
 846                 if (pcmcia_devmatch(p_dev, did))
 847                         return 1;
 848                 did++;
 849         }
 850
 851         return 0;
 852 }
 853
 854 #ifdef CONFIG_HOTPLUG
 855
 856 static int pcmcia_bus_uevent(struct device *dev, char **envp, int num_envp,
 857                              char *buffer, int buffer_size)
 858 {
 859         struct pcmcia_device *p_dev;
 860         int i, length = 0;
 861         u32 hash[4] = { 0, 0, 0, 0};
 862
 863         if (!dev)
 864                 return -ENODEV;
 865
 866         p_dev = to_pcmcia_dev(dev);
 867
 868         /* calculate hashes */
 869         for (i=0; i<4; i++) {
 870                 if (!p_dev->prod_id[i])
 871                         continue;
 872                 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
 873         }
 874
 875         i = 0;
 876
 877         if (add_uevent_var(envp, num_envp, &i,
 878                            buffer, buffer_size, &length,
 879                            "SOCKET_NO=%u",
 880                            p_dev->socket->sock))
 881                 return -ENOMEM;
 882
 883         if (add_uevent_var(envp, num_envp, &i,
 884                            buffer, buffer_size, &length,
 885                            "DEVICE_NO=%02X",
 886                            p_dev->device_no))
 887                 return -ENOMEM;
 888
 889         if (add_uevent_var(envp, num_envp, &i,
 890                            buffer, buffer_size, &length,
 891                            "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
 892                            "pa%08Xpb%08Xpc%08Xpd%08X",
 893                            p_dev->has_manf_id ? p_dev->manf_id : 0,
 894                            p_dev->has_card_id ? p_dev->card_id : 0,
 895                            p_dev->has_func_id ? p_dev->func_id : 0,
 896                            p_dev->func,
 897                            p_dev->device_no,
 898                            hash[0],
 899                            hash[1],
 900                            hash[2],
 901                            hash[3]))
 902                 return -ENOMEM;
 903
 904         envp[i] = NULL;
 905
 906         return 0;
 907 }
 908
 909 #else
 910
 911 static int pcmcia_bus_uevent(struct device *dev, char **envp, int num_envp,
 912                               char *buffer, int buffer_size)
 913 {
 914         return -ENODEV;
 915 }
 916
 917 #endif
 918
 919 /************************ per-device sysfs output ***************************/
 920
 921 #define pcmcia_device_attr(field, test, format)                         \
 922 static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf)              \
 923 {                                                                       \
 924         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);               \
 925         return p_dev->test ? sprintf (buf, format, p_dev->field) : -ENODEV; \
 926 }
 927
 928 #define pcmcia_device_stringattr(name, field)                                   \
 929 static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf)               \
 930 {                                                                       \
 931         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);               \
 932         return p_dev->field ? sprintf (buf, "%s\n", p_dev->field) : -ENODEV; \
 933 }
 934
 935 pcmcia_device_attr(func, socket, "0x%02x\n");
 936 pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
 937 pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
 938 pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
 939 pcmcia_device_stringattr(prod_id1, prod_id[0]);
 940 pcmcia_device_stringattr(prod_id2, prod_id[1]);
 941 pcmcia_device_stringattr(prod_id3, prod_id[2]);
 942 pcmcia_device_stringattr(prod_id4, prod_id[3]);
 943
 944
 945 static ssize_t pcmcia_show_pm_state(struct device *dev, struct device_attribute *attr, char *buf)
 946 {
 947         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 948
 949         if (p_dev->dev.power.power_state.event != PM_EVENT_ON)
 950                 return sprintf(buf, "off\n");
 951         else
 952                 return sprintf(buf, "on\n");
 953 }
 954
 955 static ssize_t pcmcia_store_pm_state(struct device *dev, struct device_attribute *attr,
 956                                      const char *buf, size_t count)
 957 {
 958         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 959         int ret = 0;
 960
 961         if (!count)
 962                 return -EINVAL;
 963
 964         if ((p_dev->dev.power.power_state.event == PM_EVENT_ON) &&
 965             (!strncmp(buf, "off", 3)))
 966                 ret = dpm_runtime_suspend(dev, PMSG_SUSPEND);
 967         else if ((p_dev->dev.power.power_state.event != PM_EVENT_ON) &&
 968                  (!strncmp(buf, "on", 2)))
 969                 dpm_runtime_resume(dev);
 970
 971         return ret ? ret : count;
 972 }
 973
 974
 975 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
 976 {
 977         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 978         int i;
 979         u32 hash[4] = { 0, 0, 0, 0};
 980
 981         /* calculate hashes */
 982         for (i=0; i<4; i++) {
 983                 if (!p_dev->prod_id[i])
 984                         continue;
 985                 hash[i] = crc32(0,p_dev->prod_id[i],strlen(p_dev->prod_id[i]));
 986         }
 987         return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
 988                                 "pa%08Xpb%08Xpc%08Xpd%08X\n",
 989                                 p_dev->has_manf_id ? p_dev->manf_id : 0,
 990                                 p_dev->has_card_id ? p_dev->card_id : 0,
 991                                 p_dev->has_func_id ? p_dev->func_id : 0,
 992                                 p_dev->func, p_dev->device_no,
 993                                 hash[0], hash[1], hash[2], hash[3]);
 994 }
 995
 996 static ssize_t pcmcia_store_allow_func_id_match(struct device *dev,
 997                 struct device_attribute *attr, const char *buf, size_t count)
 998 {
 999         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1000
1001         if (!count)
1002                 return -EINVAL;
1003
1004         mutex_lock(&p_dev->socket->skt_mutex);
1005         p_dev->allow_func_id_match = 1;
1006         mutex_unlock(&p_dev->socket->skt_mutex);
1007
1008         bus_rescan_devices(&pcmcia_bus_type);
1009
1010         return count;
1011 }
1012
1013 static struct device_attribute pcmcia_dev_attrs[] = {
1014         __ATTR(function, 0444, func_show, NULL),
1015         __ATTR(pm_state, 0644, pcmcia_show_pm_state, pcmcia_store_pm_state),
1016         __ATTR_RO(func_id),
1017         __ATTR_RO(manf_id),
1018         __ATTR_RO(card_id),
1019         __ATTR_RO(prod_id1),
1020         __ATTR_RO(prod_id2),
1021         __ATTR_RO(prod_id3),
1022         __ATTR_RO(prod_id4),
1023         __ATTR_RO(modalias),
1024         __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match),
1025         __ATTR_NULL,
1026 };
1027
1028 /* PM support, also needed for reset */
1029
1030 static int pcmcia_dev_suspend(struct device * dev, pm_message_t state)
1031 {
1032         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1033         struct pcmcia_driver *p_drv = NULL;
1034         int ret;
1035
1036         if (dev->driver)
1037                 p_drv = to_pcmcia_drv(dev->driver);
1038
1039         if (p_drv && p_drv->suspend) {
1040                 ret = p_drv->suspend(p_dev);
1041                 if (ret)
1042                         return ret;
1043                 p_dev->state |= DEV_SUSPEND;
1044                         if ((p_dev->state & DEV_CONFIG) &&
1045                             !(p_dev->state & DEV_SUSPEND_NORELEASE))
1046                                 pcmcia_release_configuration(p_dev);
1047         }
1048
1049         return 0;
1050 }
1051
1052
1053 static int pcmcia_dev_resume(struct device * dev)
1054 {
1055         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1056         struct pcmcia_driver *p_drv = NULL;
1057         int ret;
1058
1059         if (dev->driver)
1060                 p_drv = to_pcmcia_drv(dev->driver);
1061
1062         if (p_drv && p_drv->resume) {
1063                 p_dev->state &= ~DEV_SUSPEND;
1064                         if ((p_dev->state & DEV_CONFIG) &&
1065                             !(p_dev->state & DEV_SUSPEND_NORELEASE)){
1066                                 ret = pcmcia_request_configuration(p_dev,
1067                                                  &p_dev->conf);
1068                                 if (ret)
1069                                         return ret;
1070                         }
1071                 return p_drv->resume(p_dev);
1072         }
1073
1074         return 0;
1075 }
1076
1077
1078 static int pcmcia_bus_suspend_callback(struct device *dev, void * _data)
1079 {
1080         struct pcmcia_socket *skt = _data;
1081         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1082
1083         if (p_dev->socket != skt)
1084                 return 0;
1085
1086         return dpm_runtime_suspend(dev, PMSG_SUSPEND);
1087 }
1088
1089 static int pcmcia_bus_resume_callback(struct device *dev, void * _data)
1090 {
1091         struct pcmcia_socket *skt = _data;
1092         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1093
1094         if (p_dev->socket != skt)
1095                 return 0;
1096
1097         dpm_runtime_resume(dev);
1098
1099         return 0;
1100 }
1101
1102 static int pcmcia_bus_resume(struct pcmcia_socket *skt)
1103 {
1104         bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback);
1105         return 0;
1106 }
1107
1108 static int pcmcia_bus_suspend(struct pcmcia_socket *skt)
1109 {
1110         if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt,
1111                              pcmcia_bus_suspend_callback)) {
1112                 pcmcia_bus_resume(skt);
1113                 return -EIO;
1114         }
1115         return 0;
1116 }
1117
1118
1119 /*======================================================================
1120
1121     The card status event handler.
1122
1123 ======================================================================*/
1124
1125 /* Normally, the event is passed to individual drivers after
1126  * informing userspace. Only for CS_EVENT_CARD_REMOVAL this
1127  * is inversed to maintain historic compatibility.
1128  */
1129
1130 static int ds_event(struct pcmcia_socket *skt, event_t event, int priority)
1131 {
1132         struct pcmcia_socket *s = pcmcia_get_socket(skt);
1133
1134         ds_dbg(1, "ds_event(0x%06x, %d, 0x%p)\n",
1135                event, priority, skt);
1136
1137         switch (event) {
1138         case CS_EVENT_CARD_REMOVAL:
1139                 s->pcmcia_state.present = 0;
1140                 pcmcia_card_remove(skt);
1141                 handle_event(skt, event);
1142                 break;
1143
1144         case CS_EVENT_CARD_INSERTION:
1145                 s->pcmcia_state.present = 1;
1146                 pcmcia_card_add(skt);
1147                 handle_event(skt, event);
1148                 break;
1149
1150         case CS_EVENT_EJECTION_REQUEST:
1151                 break;
1152
1153         case CS_EVENT_PM_SUSPEND:
1154         case CS_EVENT_PM_RESUME:
1155         case CS_EVENT_RESET_PHYSICAL:
1156         case CS_EVENT_CARD_RESET:
1157         default:
1158                 handle_event(skt, event);
1159                 break;
1160     }
1161
1162     pcmcia_put_socket(s);
1163
1164     return 0;
1165 } /* ds_event */
1166
1167
1168 static struct pcmcia_callback pcmcia_bus_callback = {
1169         .owner = THIS_MODULE,
1170         .event = ds_event,
1171         .requery = pcmcia_bus_rescan,
1172         .suspend = pcmcia_bus_suspend,
1173         .resume = pcmcia_bus_resume,
1174 };
1175
1176 static int __devinit pcmcia_bus_add_socket(struct class_device *class_dev,
1177                                            struct class_interface *class_intf)
1178 {
1179         struct pcmcia_socket *socket = class_get_devdata(class_dev);
1180         int ret;
1181
1182         socket = pcmcia_get_socket(socket);
1183         if (!socket) {
1184                 printk(KERN_ERR "PCMCIA obtaining reference to socket %p failed\n", socket);
1185                 return -ENODEV;
1186         }
1187
1188         /*
1189          * Ugly. But we want to wait for the socket threads to have started up.
1190          * We really should let the drivers themselves drive some of this..
1191          */
1192         msleep(250);
1193
1194 #ifdef CONFIG_PCMCIA_IOCTL
1195         init_waitqueue_head(&socket->queue);
1196 #endif
1197         INIT_LIST_HEAD(&socket->devices_list);
1198         INIT_WORK(&socket->device_add, pcmcia_delayed_add_pseudo_device, socket);
1199         memset(&socket->pcmcia_state, 0, sizeof(u8));
1200         socket->device_count = 0;
1201
1202         ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback);
1203         if (ret) {
1204                 printk(KERN_ERR "PCMCIA registration PCCard core failed for socket %p\n", socket);
1205                 pcmcia_put_socket(socket);
1206                 return (ret);
1207         }
1208
1209         return 0;
1210 }
1211
1212 static void pcmcia_bus_remove_socket(struct class_device *class_dev,
1213                                      struct class_interface *class_intf)
1214 {
1215         struct pcmcia_socket *socket = class_get_devdata(class_dev);
1216
1217         if (!socket)
1218                 return;
1219
1220         socket->pcmcia_state.dead = 1;
1221         pccard_register_pcmcia(socket, NULL);
1222
1223         pcmcia_put_socket(socket);
1224
1225         return;
1226 }
1227
1228
1229 /* the pcmcia_bus_interface is used to handle pcmcia socket devices */
1230 static struct class_interface pcmcia_bus_interface = {
1231         .class = &pcmcia_socket_class,
1232         .add = &pcmcia_bus_add_socket,
1233         .remove = &pcmcia_bus_remove_socket,
1234 };
1235
1236
1237 struct bus_type pcmcia_bus_type = {
1238         .name = "pcmcia",
1239         .uevent = pcmcia_bus_uevent,
1240         .match = pcmcia_bus_match,
1241         .dev_attrs = pcmcia_dev_attrs,
1242         .probe = pcmcia_device_probe,
1243         .remove = pcmcia_device_remove,
1244         .suspend = pcmcia_dev_suspend,
1245         .resume = pcmcia_dev_resume,
1246 };
1247
1248
1249 static int __init init_pcmcia_bus(void)
1250 {
1251         spin_lock_init(&pcmcia_dev_list_lock);
1252
1253         bus_register(&pcmcia_bus_type);
1254         class_interface_register(&pcmcia_bus_interface);
1255
1256         pcmcia_setup_ioctl();
1257
1258         return 0;
1259 }
1260 fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that
1261                                * pcmcia_socket_class is already registered */
1262
1263
1264 static void __exit exit_pcmcia_bus(void)
1265 {
1266         pcmcia_cleanup_ioctl();
1267
1268         class_interface_unregister(&pcmcia_bus_interface);
1269
1270         bus_unregister(&pcmcia_bus_type);
1271 }
1272 module_exit(exit_pcmcia_bus);
1273
1274
1275 MODULE_ALIAS("ds");