git.oblomov.eu Git - linux-2.6/blob - drivers/pcmcia/ds.c

   1 /*
   2  * ds.c -- 16-bit PCMCIA core support
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2 as
   6  * published by the Free Software Foundation.
   7  *
   8  * The initial developer of the original code is David A. Hinds
   9  * <dahinds@users.sourceforge.net>.  Portions created by David A. Hinds
  10  * are Copyright (C) 1999 David A. Hinds.  All Rights Reserved.
  11  *
  12  * (C) 1999             David A. Hinds
  13  * (C) 2003 - 2005      Dominik Brodowski
  14  */
  15
  16 #include <linux/config.h>
  17 #include <linux/kernel.h>
  18 #include <linux/module.h>
  19 #include <linux/init.h>
  20 #include <linux/errno.h>
  21 #include <linux/list.h>
  22 #include <linux/delay.h>
  23 #include <linux/workqueue.h>
  24 #include <linux/crc32.h>
  25 #include <linux/firmware.h>
  26
  27 #define IN_CARD_SERVICES
  28 #include <pcmcia/cs_types.h>
  29 #include <pcmcia/cs.h>
  30 #include <pcmcia/cistpl.h>
  31 #include <pcmcia/ds.h>
  32 #include <pcmcia/ss.h>
  33
  34 #include "cs_internal.h"
  35 #include "ds_internal.h"
  36
  37 /*====================================================================*/
  38
  39 /* Module parameters */
  40
  41 MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
  42 MODULE_DESCRIPTION("PCMCIA Driver Services");
  43 MODULE_LICENSE("GPL");
  44
  45 #ifdef DEBUG
  46 int ds_pc_debug;
  47
  48 module_param_named(pc_debug, ds_pc_debug, int, 0644);
  49
  50 #define ds_dbg(lvl, fmt, arg...) do {                           \
  51         if (ds_pc_debug > (lvl))                                        \
  52                 printk(KERN_DEBUG "ds: " fmt , ## arg);         \
  53 } while (0)
  54 #else
  55 #define ds_dbg(lvl, fmt, arg...) do { } while (0)
  56 #endif
  57
  58 spinlock_t pcmcia_dev_list_lock;
  59
  60 /*====================================================================*/
  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         driver->drv.probe = pcmcia_device_probe;
 315         driver->drv.remove = pcmcia_device_remove;
 316
 317         return driver_register(&driver->drv);
 318 }
 319 EXPORT_SYMBOL(pcmcia_register_driver);
 320
 321 /**
 322  * pcmcia_unregister_driver - unregister a PCMCIA driver with the bus core
 323  */
 324 void pcmcia_unregister_driver(struct pcmcia_driver *driver)
 325 {
 326         driver_unregister(&driver->drv);
 327 }
 328 EXPORT_SYMBOL(pcmcia_unregister_driver);
 329
 330
 331 /* pcmcia_device handling */
 332
 333 struct pcmcia_device * pcmcia_get_dev(struct pcmcia_device *p_dev)
 334 {
 335         struct device *tmp_dev;
 336         tmp_dev = get_device(&p_dev->dev);
 337         if (!tmp_dev)
 338                 return NULL;
 339         return to_pcmcia_dev(tmp_dev);
 340 }
 341
 342 void pcmcia_put_dev(struct pcmcia_device *p_dev)
 343 {
 344         if (p_dev)
 345                 put_device(&p_dev->dev);
 346 }
 347
 348 static void pcmcia_release_dev(struct device *dev)
 349 {
 350         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 351         ds_dbg(1, "releasing dev %p\n", p_dev);
 352         pcmcia_put_socket(p_dev->socket);
 353         kfree(p_dev->devname);
 354         kfree(p_dev);
 355 }
 356
 357
 358 static int pcmcia_device_probe(struct device * dev)
 359 {
 360         struct pcmcia_device *p_dev;
 361         struct pcmcia_driver *p_drv;
 362         struct pcmcia_socket *s;
 363         int ret = 0;
 364
 365         dev = get_device(dev);
 366         if (!dev)
 367                 return -ENODEV;
 368
 369         p_dev = to_pcmcia_dev(dev);
 370         p_drv = to_pcmcia_drv(dev->driver);
 371         s = p_dev->socket;
 372
 373         if ((!p_drv->probe) || (!try_module_get(p_drv->owner))) {
 374                 ret = -EINVAL;
 375                 goto put_dev;
 376         }
 377
 378         p_dev->state &= ~CLIENT_UNBOUND;
 379
 380         /* set up the device configuration, if it hasn't been done before */
 381         if (!s->functions) {
 382                 cistpl_longlink_mfc_t mfc;
 383                 if (pccard_read_tuple(s, p_dev->func, CISTPL_LONGLINK_MFC,
 384                                       &mfc) == CS_SUCCESS)
 385                         s->functions = mfc.nfn;
 386                 else
 387                         s->functions = 1;
 388                 s->config = kzalloc(sizeof(config_t) * s->functions,
 389                                     GFP_KERNEL);
 390                 if (!s->config) {
 391                         ret = -ENOMEM;
 392                         goto put_module;
 393                 }
 394         }
 395
 396         ret = p_drv->probe(p_dev);
 397
 398  put_module:
 399         if (ret)
 400                 module_put(p_drv->owner);
 401  put_dev:
 402         if (ret)
 403                 put_device(dev);
 404         return (ret);
 405 }
 406
 407
 408 static int pcmcia_device_remove(struct device * dev)
 409 {
 410         struct pcmcia_device *p_dev;
 411         struct pcmcia_driver *p_drv;
 412         int i;
 413
 414         /* detach the "instance" */
 415         p_dev = to_pcmcia_dev(dev);
 416         p_drv = to_pcmcia_drv(dev->driver);
 417         if (!p_drv)
 418                 return 0;
 419
 420         if (p_drv->remove)
 421                 p_drv->remove(p_dev);
 422
 423         /* check for proper unloading */
 424         if (p_dev->state & (CLIENT_IRQ_REQ|CLIENT_IO_REQ|CLIENT_CONFIG_LOCKED))
 425                 printk(KERN_INFO "pcmcia: driver %s did not release config properly\n",
 426                        p_drv->drv.name);
 427
 428         for (i = 0; i < MAX_WIN; i++)
 429                 if (p_dev->state & CLIENT_WIN_REQ(i))
 430                         printk(KERN_INFO "pcmcia: driver %s did not release windows properly\n",
 431                                p_drv->drv.name);
 432
 433         /* references from pcmcia_probe_device */
 434         p_dev->state = CLIENT_UNBOUND;
 435         pcmcia_put_dev(p_dev);
 436         module_put(p_drv->owner);
 437
 438         return 0;
 439 }
 440
 441
 442 /*
 443  * Removes a PCMCIA card from the device tree and socket list.
 444  */
 445 static void pcmcia_card_remove(struct pcmcia_socket *s)
 446 {
 447         struct pcmcia_device    *p_dev;
 448         unsigned long           flags;
 449
 450         ds_dbg(2, "unbind_request(%d)\n", s->sock);
 451
 452         s->device_count = 0;
 453
 454         for (;;) {
 455                 /* unregister all pcmcia_devices registered with this socket*/
 456                 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 457                 if (list_empty(&s->devices_list)) {
 458                         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 459                         return;
 460                 }
 461                 p_dev = list_entry((&s->devices_list)->next, struct pcmcia_device, socket_device_list);
 462                 list_del(&p_dev->socket_device_list);
 463                 p_dev->state |= CLIENT_STALE;
 464                 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 465
 466                 device_unregister(&p_dev->dev);
 467         }
 468
 469         return;
 470 } /* unbind_request */
 471
 472
 473 /*
 474  * pcmcia_device_query -- determine information about a pcmcia device
 475  */
 476 static int pcmcia_device_query(struct pcmcia_device *p_dev)
 477 {
 478         cistpl_manfid_t manf_id;
 479         cistpl_funcid_t func_id;
 480         cistpl_vers_1_t *vers1;
 481         unsigned int i;
 482
 483         vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL);
 484         if (!vers1)
 485                 return -ENOMEM;
 486
 487         if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 488                                CISTPL_MANFID, &manf_id)) {
 489                 p_dev->manf_id = manf_id.manf;
 490                 p_dev->card_id = manf_id.card;
 491                 p_dev->has_manf_id = 1;
 492                 p_dev->has_card_id = 1;
 493         }
 494
 495         if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 496                                CISTPL_FUNCID, &func_id)) {
 497                 p_dev->func_id = func_id.func;
 498                 p_dev->has_func_id = 1;
 499         } else {
 500                 /* rule of thumb: cards with no FUNCID, but with
 501                  * common memory device geometry information, are
 502                  * probably memory cards (from pcmcia-cs) */
 503                 cistpl_device_geo_t *devgeo;
 504
 505                 devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL);
 506                 if (!devgeo) {
 507                         kfree(vers1);
 508                         return -ENOMEM;
 509                 }
 510                 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 511                                       CISTPL_DEVICE_GEO, devgeo)) {
 512                         ds_dbg(0, "mem device geometry probably means "
 513                                "FUNCID_MEMORY\n");
 514                         p_dev->func_id = CISTPL_FUNCID_MEMORY;
 515                         p_dev->has_func_id = 1;
 516                 }
 517                 kfree(devgeo);
 518         }
 519
 520         if (!pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_VERS_1,
 521                                vers1)) {
 522                 for (i=0; i < vers1->ns; i++) {
 523                         char *tmp;
 524                         unsigned int length;
 525
 526                         tmp = vers1->str + vers1->ofs[i];
 527
 528                         length = strlen(tmp) + 1;
 529                         if ((length < 3) || (length > 255))
 530                                 continue;
 531
 532                         p_dev->prod_id[i] = kmalloc(sizeof(char) * length,
 533                                                     GFP_KERNEL);
 534                         if (!p_dev->prod_id[i])
 535                                 continue;
 536
 537                         p_dev->prod_id[i] = strncpy(p_dev->prod_id[i],
 538                                                     tmp, length);
 539                 }
 540         }
 541
 542         kfree(vers1);
 543         return 0;
 544 }
 545
 546
 547 /* device_add_lock is needed to avoid double registration by cardmgr and kernel.
 548  * Serializes pcmcia_device_add; will most likely be removed in future.
 549  *
 550  * While it has the caveat that adding new PCMCIA devices inside(!) device_register()
 551  * won't work, this doesn't matter much at the moment: the driver core doesn't
 552  * support it either.
 553  */
 554 static DECLARE_MUTEX(device_add_lock);
 555
 556 struct pcmcia_device * pcmcia_device_add(struct pcmcia_socket *s, unsigned int function)
 557 {
 558         struct pcmcia_device *p_dev;
 559         unsigned long flags;
 560         int bus_id_len;
 561
 562         s = pcmcia_get_socket(s);
 563         if (!s)
 564                 return NULL;
 565
 566         down(&device_add_lock);
 567
 568         /* max of 2 devices per card */
 569         if (s->device_count == 2)
 570                 goto err_put;
 571
 572         p_dev = kzalloc(sizeof(struct pcmcia_device), GFP_KERNEL);
 573         if (!p_dev)
 574                 goto err_put;
 575
 576         p_dev->socket = s;
 577         p_dev->device_no = (s->device_count++);
 578         p_dev->func   = function;
 579
 580         p_dev->dev.bus = &pcmcia_bus_type;
 581         p_dev->dev.parent = s->dev.dev;
 582         p_dev->dev.release = pcmcia_release_dev;
 583         bus_id_len = sprintf (p_dev->dev.bus_id, "%d.%d", p_dev->socket->sock, p_dev->device_no);
 584
 585         p_dev->devname = kmalloc(6 + bus_id_len + 1, GFP_KERNEL);
 586         if (!p_dev->devname)
 587                 goto err_free;
 588         sprintf (p_dev->devname, "pcmcia%s", p_dev->dev.bus_id);
 589
 590         /* compat */
 591         p_dev->state = CLIENT_UNBOUND;
 592
 593         /* Add to the list in pcmcia_bus_socket */
 594         spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 595         list_add_tail(&p_dev->socket_device_list, &s->devices_list);
 596         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 597
 598         printk(KERN_NOTICE "pcmcia: registering new device %s\n",
 599                p_dev->devname);
 600
 601         pcmcia_device_query(p_dev);
 602
 603         if (device_register(&p_dev->dev)) {
 604                 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 605                 list_del(&p_dev->socket_device_list);
 606                 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 607
 608                 goto err_free;
 609        }
 610
 611         up(&device_add_lock);
 612
 613         return p_dev;
 614
 615  err_free:
 616         kfree(p_dev->devname);
 617         kfree(p_dev);
 618         s->device_count--;
 619  err_put:
 620         up(&device_add_lock);
 621         pcmcia_put_socket(s);
 622
 623         return NULL;
 624 }
 625
 626
 627 static int pcmcia_card_add(struct pcmcia_socket *s)
 628 {
 629         cisinfo_t cisinfo;
 630         cistpl_longlink_mfc_t mfc;
 631         unsigned int no_funcs, i;
 632         int ret = 0;
 633
 634         if (!(s->resource_setup_done))
 635                 return -EAGAIN; /* try again, but later... */
 636
 637         if (pcmcia_validate_mem(s))
 638                 return -EAGAIN; /* try again, but later... */
 639
 640         ret = pccard_validate_cis(s, BIND_FN_ALL, &cisinfo);
 641         if (ret || !cisinfo.Chains) {
 642                 ds_dbg(0, "invalid CIS or invalid resources\n");
 643                 return -ENODEV;
 644         }
 645
 646         if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
 647                 no_funcs = mfc.nfn;
 648         else
 649                 no_funcs = 1;
 650
 651         for (i=0; i < no_funcs; i++)
 652                 pcmcia_device_add(s, i);
 653
 654         return (ret);
 655 }
 656
 657
 658 static void pcmcia_delayed_add_pseudo_device(void *data)
 659 {
 660         struct pcmcia_socket *s = data;
 661         pcmcia_device_add(s, 0);
 662         s->pcmcia_state.device_add_pending = 0;
 663 }
 664
 665 static inline void pcmcia_add_pseudo_device(struct pcmcia_socket *s)
 666 {
 667         if (!s->pcmcia_state.device_add_pending) {
 668                 s->pcmcia_state.device_add_pending = 1;
 669                 schedule_work(&s->device_add);
 670         }
 671         return;
 672 }
 673
 674 static int pcmcia_requery(struct device *dev, void * _data)
 675 {
 676         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 677         if (!p_dev->dev.driver)
 678                 pcmcia_device_query(p_dev);
 679
 680         return 0;
 681 }
 682
 683 static void pcmcia_bus_rescan(struct pcmcia_socket *skt)
 684 {
 685         int no_devices=0;
 686         unsigned long flags;
 687
 688         /* must be called with skt_sem held */
 689         spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 690         if (list_empty(&skt->devices_list))
 691                 no_devices=1;
 692         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 693
 694         /* if no devices were added for this socket yet because of
 695          * missing resource information or other trouble, we need to
 696          * do this now. */
 697         if (no_devices) {
 698                 int ret = pcmcia_card_add(skt);
 699                 if (ret)
 700                         return;
 701         }
 702
 703         /* some device information might have changed because of a CIS
 704          * update or because we can finally read it correctly... so
 705          * determine it again, overwriting old values if necessary. */
 706         bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery);
 707
 708         /* we re-scan all devices, not just the ones connected to this
 709          * socket. This does not matter, though. */
 710         bus_rescan_devices(&pcmcia_bus_type);
 711 }
 712
 713 static inline int pcmcia_devmatch(struct pcmcia_device *dev,
 714                                   struct pcmcia_device_id *did)
 715 {
 716         if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
 717                 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
 718                         return 0;
 719         }
 720
 721         if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
 722                 if ((!dev->has_card_id) || (dev->card_id != did->card_id))
 723                         return 0;
 724         }
 725
 726         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
 727                 if (dev->func != did->function)
 728                         return 0;
 729         }
 730
 731         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
 732                 if (!dev->prod_id[0])
 733                         return 0;
 734                 if (strcmp(did->prod_id[0], dev->prod_id[0]))
 735                         return 0;
 736         }
 737
 738         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
 739                 if (!dev->prod_id[1])
 740                         return 0;
 741                 if (strcmp(did->prod_id[1], dev->prod_id[1]))
 742                         return 0;
 743         }
 744
 745         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
 746                 if (!dev->prod_id[2])
 747                         return 0;
 748                 if (strcmp(did->prod_id[2], dev->prod_id[2]))
 749                         return 0;
 750         }
 751
 752         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
 753                 if (!dev->prod_id[3])
 754                         return 0;
 755                 if (strcmp(did->prod_id[3], dev->prod_id[3]))
 756                         return 0;
 757         }
 758
 759         if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
 760                 /* handle pseudo multifunction devices:
 761                  * there are at most two pseudo multifunction devices.
 762                  * if we're matching against the first, schedule a
 763                  * call which will then check whether there are two
 764                  * pseudo devices, and if not, add the second one.
 765                  */
 766                 if (dev->device_no == 0)
 767                         pcmcia_add_pseudo_device(dev->socket);
 768
 769                 if (dev->device_no != did->device_no)
 770                         return 0;
 771         }
 772
 773         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
 774                 if ((!dev->has_func_id) || (dev->func_id != did->func_id))
 775                         return 0;
 776
 777                 /* if this is a pseudo-multi-function device,
 778                  * we need explicit matches */
 779                 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO)
 780                         return 0;
 781                 if (dev->device_no)
 782                         return 0;
 783
 784                 /* also, FUNC_ID matching needs to be activated by userspace
 785                  * after it has re-checked that there is no possible module
 786                  * with a prod_id/manf_id/card_id match.
 787                  */
 788                 if (!dev->allow_func_id_match)
 789                         return 0;
 790         }
 791
 792         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
 793                 if (!dev->socket->fake_cis)
 794                         pcmcia_load_firmware(dev, did->cisfile);
 795
 796                 if (!dev->socket->fake_cis)
 797                         return 0;
 798         }
 799
 800         if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
 801                 int i;
 802                 for (i=0; i<4; i++)
 803                         if (dev->prod_id[i])
 804                                 return 0;
 805                 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
 806                         return 0;
 807         }
 808
 809         dev->dev.driver_data = (void *) did;
 810
 811         return 1;
 812 }
 813
 814
 815 static int pcmcia_bus_match(struct device * dev, struct device_driver * drv) {
 816         struct pcmcia_device * p_dev = to_pcmcia_dev(dev);
 817         struct pcmcia_driver * p_drv = to_pcmcia_drv(drv);
 818         struct pcmcia_device_id *did = p_drv->id_table;
 819
 820         /* matching by cardmgr */
 821         if (p_dev->cardmgr == p_drv)
 822                 return 1;
 823
 824         while (did && did->match_flags) {
 825                 if (pcmcia_devmatch(p_dev, did))
 826                         return 1;
 827                 did++;
 828         }
 829
 830         return 0;
 831 }
 832
 833 #ifdef CONFIG_HOTPLUG
 834
 835 static int pcmcia_bus_uevent(struct device *dev, char **envp, int num_envp,
 836                              char *buffer, int buffer_size)
 837 {
 838         struct pcmcia_device *p_dev;
 839         int i, length = 0;
 840         u32 hash[4] = { 0, 0, 0, 0};
 841
 842         if (!dev)
 843                 return -ENODEV;
 844
 845         p_dev = to_pcmcia_dev(dev);
 846
 847         /* calculate hashes */
 848         for (i=0; i<4; i++) {
 849                 if (!p_dev->prod_id[i])
 850                         continue;
 851                 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
 852         }
 853
 854         i = 0;
 855
 856         if (add_uevent_var(envp, num_envp, &i,
 857                            buffer, buffer_size, &length,
 858                            "SOCKET_NO=%u",
 859                            p_dev->socket->sock))
 860                 return -ENOMEM;
 861
 862         if (add_uevent_var(envp, num_envp, &i,
 863                            buffer, buffer_size, &length,
 864                            "DEVICE_NO=%02X",
 865                            p_dev->device_no))
 866                 return -ENOMEM;
 867
 868         if (add_uevent_var(envp, num_envp, &i,
 869                            buffer, buffer_size, &length,
 870                            "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
 871                            "pa%08Xpb%08Xpc%08Xpd%08X",
 872                            p_dev->has_manf_id ? p_dev->manf_id : 0,
 873                            p_dev->has_card_id ? p_dev->card_id : 0,
 874                            p_dev->has_func_id ? p_dev->func_id : 0,
 875                            p_dev->func,
 876                            p_dev->device_no,
 877                            hash[0],
 878                            hash[1],
 879                            hash[2],
 880                            hash[3]))
 881                 return -ENOMEM;
 882
 883         envp[i] = NULL;
 884
 885         return 0;
 886 }
 887
 888 #else
 889
 890 static int pcmcia_bus_uevent(struct device *dev, char **envp, int num_envp,
 891                               char *buffer, int buffer_size)
 892 {
 893         return -ENODEV;
 894 }
 895
 896 #endif
 897
 898 /************************ per-device sysfs output ***************************/
 899
 900 #define pcmcia_device_attr(field, test, format)                         \
 901 static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf)              \
 902 {                                                                       \
 903         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);               \
 904         return p_dev->test ? sprintf (buf, format, p_dev->field) : -ENODEV; \
 905 }
 906
 907 #define pcmcia_device_stringattr(name, field)                                   \
 908 static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf)               \
 909 {                                                                       \
 910         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);               \
 911         return p_dev->field ? sprintf (buf, "%s\n", p_dev->field) : -ENODEV; \
 912 }
 913
 914 pcmcia_device_attr(func, socket, "0x%02x\n");
 915 pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
 916 pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
 917 pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
 918 pcmcia_device_stringattr(prod_id1, prod_id[0]);
 919 pcmcia_device_stringattr(prod_id2, prod_id[1]);
 920 pcmcia_device_stringattr(prod_id3, prod_id[2]);
 921 pcmcia_device_stringattr(prod_id4, prod_id[3]);
 922
 923 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
 924 {
 925         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 926         int i;
 927         u32 hash[4] = { 0, 0, 0, 0};
 928
 929         /* calculate hashes */
 930         for (i=0; i<4; i++) {
 931                 if (!p_dev->prod_id[i])
 932                         continue;
 933                 hash[i] = crc32(0,p_dev->prod_id[i],strlen(p_dev->prod_id[i]));
 934         }
 935         return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
 936                                 "pa%08Xpb%08Xpc%08Xpd%08X\n",
 937                                 p_dev->has_manf_id ? p_dev->manf_id : 0,
 938                                 p_dev->has_card_id ? p_dev->card_id : 0,
 939                                 p_dev->has_func_id ? p_dev->func_id : 0,
 940                                 p_dev->func, p_dev->device_no,
 941                                 hash[0], hash[1], hash[2], hash[3]);
 942 }
 943
 944 static ssize_t pcmcia_store_allow_func_id_match(struct device *dev,
 945                 struct device_attribute *attr, const char *buf, size_t count)
 946 {
 947         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 948         if (!count)
 949                 return -EINVAL;
 950
 951         down(&p_dev->socket->skt_sem);
 952         p_dev->allow_func_id_match = 1;
 953         up(&p_dev->socket->skt_sem);
 954
 955         bus_rescan_devices(&pcmcia_bus_type);
 956
 957         return count;
 958 }
 959
 960 static struct device_attribute pcmcia_dev_attrs[] = {
 961         __ATTR(function, 0444, func_show, NULL),
 962         __ATTR_RO(func_id),
 963         __ATTR_RO(manf_id),
 964         __ATTR_RO(card_id),
 965         __ATTR_RO(prod_id1),
 966         __ATTR_RO(prod_id2),
 967         __ATTR_RO(prod_id3),
 968         __ATTR_RO(prod_id4),
 969         __ATTR_RO(modalias),
 970         __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match),
 971         __ATTR_NULL,
 972 };
 973
 974 /* PM support, also needed for reset */
 975
 976 static int pcmcia_dev_suspend(struct device * dev, pm_message_t state)
 977 {
 978         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 979         struct pcmcia_driver *p_drv = NULL;
 980
 981         if (dev->driver)
 982                 p_drv = to_pcmcia_drv(dev->driver);
 983
 984         if (p_drv && p_drv->suspend)
 985                 return p_drv->suspend(p_dev);
 986
 987         return 0;
 988 }
 989
 990
 991 static int pcmcia_dev_resume(struct device * dev)
 992 {
 993         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 994         struct pcmcia_driver *p_drv = NULL;
 995
 996         if (dev->driver)
 997                 p_drv = to_pcmcia_drv(dev->driver);
 998
 999         if (p_drv && p_drv->resume)
1000                 return p_drv->resume(p_dev);
1001
1002         return 0;
1003 }
1004
1005
1006 static int pcmcia_bus_suspend_callback(struct device *dev, void * _data)
1007 {
1008         struct pcmcia_socket *skt = _data;
1009         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1010
1011         if (p_dev->socket != skt)
1012                 return 0;
1013
1014         return dpm_runtime_suspend(dev, PMSG_SUSPEND);
1015 }
1016
1017 static int pcmcia_bus_resume_callback(struct device *dev, void * _data)
1018 {
1019         struct pcmcia_socket *skt = _data;
1020         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1021
1022         if (p_dev->socket != skt)
1023                 return 0;
1024
1025         dpm_runtime_resume(dev);
1026
1027         return 0;
1028 }
1029
1030 static int pcmcia_bus_resume(struct pcmcia_socket *skt)
1031 {
1032         bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback);
1033         return 0;
1034 }
1035
1036 static int pcmcia_bus_suspend(struct pcmcia_socket *skt)
1037 {
1038         if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt,
1039                              pcmcia_bus_suspend_callback)) {
1040                 pcmcia_bus_resume(skt);
1041                 return -EIO;
1042         }
1043         return 0;
1044 }
1045
1046
1047 /*======================================================================
1048
1049     The card status event handler.
1050
1051 ======================================================================*/
1052
1053 /* Normally, the event is passed to individual drivers after
1054  * informing userspace. Only for CS_EVENT_CARD_REMOVAL this
1055  * is inversed to maintain historic compatibility.
1056  */
1057
1058 static int ds_event(struct pcmcia_socket *skt, event_t event, int priority)
1059 {
1060         struct pcmcia_socket *s = pcmcia_get_socket(skt);
1061
1062         ds_dbg(1, "ds_event(0x%06x, %d, 0x%p)\n",
1063                event, priority, skt);
1064
1065         switch (event) {
1066         case CS_EVENT_CARD_REMOVAL:
1067                 s->pcmcia_state.present = 0;
1068                 pcmcia_card_remove(skt);
1069                 handle_event(skt, event);
1070                 break;
1071
1072         case CS_EVENT_CARD_INSERTION:
1073                 s->pcmcia_state.present = 1;
1074                 pcmcia_card_add(skt);
1075                 handle_event(skt, event);
1076                 break;
1077
1078         case CS_EVENT_EJECTION_REQUEST:
1079                 break;
1080
1081         case CS_EVENT_PM_SUSPEND:
1082         case CS_EVENT_PM_RESUME:
1083         case CS_EVENT_RESET_PHYSICAL:
1084         case CS_EVENT_CARD_RESET:
1085         default:
1086                 handle_event(skt, event);
1087                 break;
1088     }
1089
1090     pcmcia_put_socket(s);
1091
1092     return 0;
1093 } /* ds_event */
1094
1095
1096 static struct pcmcia_callback pcmcia_bus_callback = {
1097         .owner = THIS_MODULE,
1098         .event = ds_event,
1099         .requery = pcmcia_bus_rescan,
1100         .suspend = pcmcia_bus_suspend,
1101         .resume = pcmcia_bus_resume,
1102 };
1103
1104 static int __devinit pcmcia_bus_add_socket(struct class_device *class_dev,
1105                                            struct class_interface *class_intf)
1106 {
1107         struct pcmcia_socket *socket = class_get_devdata(class_dev);
1108         int ret;
1109
1110         socket = pcmcia_get_socket(socket);
1111         if (!socket) {
1112                 printk(KERN_ERR "PCMCIA obtaining reference to socket %p failed\n", socket);
1113                 return -ENODEV;
1114         }
1115
1116         /*
1117          * Ugly. But we want to wait for the socket threads to have started up.
1118          * We really should let the drivers themselves drive some of this..
1119          */
1120         msleep(250);
1121
1122 #ifdef CONFIG_PCMCIA_IOCTL
1123         init_waitqueue_head(&socket->queue);
1124 #endif
1125         INIT_LIST_HEAD(&socket->devices_list);
1126         INIT_WORK(&socket->device_add, pcmcia_delayed_add_pseudo_device, socket);
1127         memset(&socket->pcmcia_state, 0, sizeof(u8));
1128         socket->device_count = 0;
1129
1130         ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback);
1131         if (ret) {
1132                 printk(KERN_ERR "PCMCIA registration PCCard core failed for socket %p\n", socket);
1133                 pcmcia_put_socket(socket);
1134                 return (ret);
1135         }
1136
1137         return 0;
1138 }
1139
1140 static void pcmcia_bus_remove_socket(struct class_device *class_dev,
1141                                      struct class_interface *class_intf)
1142 {
1143         struct pcmcia_socket *socket = class_get_devdata(class_dev);
1144
1145         if (!socket)
1146                 return;
1147
1148         socket->pcmcia_state.dead = 1;
1149         pccard_register_pcmcia(socket, NULL);
1150
1151         pcmcia_put_socket(socket);
1152
1153         return;
1154 }
1155
1156
1157 /* the pcmcia_bus_interface is used to handle pcmcia socket devices */
1158 static struct class_interface pcmcia_bus_interface = {
1159         .class = &pcmcia_socket_class,
1160         .add = &pcmcia_bus_add_socket,
1161         .remove = &pcmcia_bus_remove_socket,
1162 };
1163
1164
1165 struct bus_type pcmcia_bus_type = {
1166         .name = "pcmcia",
1167         .uevent = pcmcia_bus_uevent,
1168         .match = pcmcia_bus_match,
1169         .dev_attrs = pcmcia_dev_attrs,
1170         .suspend = pcmcia_dev_suspend,
1171         .resume = pcmcia_dev_resume,
1172 };
1173
1174
1175 static int __init init_pcmcia_bus(void)
1176 {
1177         spin_lock_init(&pcmcia_dev_list_lock);
1178
1179         bus_register(&pcmcia_bus_type);
1180         class_interface_register(&pcmcia_bus_interface);
1181
1182         pcmcia_setup_ioctl();
1183
1184         return 0;
1185 }
1186 fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that
1187                                * pcmcia_socket_class is already registered */
1188
1189
1190 static void __exit exit_pcmcia_bus(void)
1191 {
1192         pcmcia_cleanup_ioctl();
1193
1194         class_interface_unregister(&pcmcia_bus_interface);
1195
1196         bus_unregister(&pcmcia_bus_type);
1197 }
1198 module_exit(exit_pcmcia_bus);
1199
1200
1201 MODULE_ALIAS("ds");