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 - 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
 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_dev(struct device *dev)
 347 {
 348         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 349         ds_dbg(1, "releasing dev %p\n", p_dev);
 350         pcmcia_put_socket(p_dev->socket);
 351         kfree(p_dev->devname);
 352         kfree(p_dev);
 353 }
 354
 355
 356 static int pcmcia_device_probe(struct device * dev)
 357 {
 358         struct pcmcia_device *p_dev;
 359         struct pcmcia_driver *p_drv;
 360         struct pcmcia_socket *s;
 361         int ret = 0;
 362
 363         dev = get_device(dev);
 364         if (!dev)
 365                 return -ENODEV;
 366
 367         p_dev = to_pcmcia_dev(dev);
 368         p_drv = to_pcmcia_drv(dev->driver);
 369         s = p_dev->socket;
 370
 371         if ((!p_drv->probe) || (!try_module_get(p_drv->owner))) {
 372                 ret = -EINVAL;
 373                 goto put_dev;
 374         }
 375
 376         p_dev->state &= ~CLIENT_UNBOUND;
 377
 378         /* set up the device configuration, if it hasn't been done before */
 379         if (!s->functions) {
 380                 cistpl_longlink_mfc_t mfc;
 381                 if (pccard_read_tuple(s, p_dev->func, CISTPL_LONGLINK_MFC,
 382                                       &mfc) == CS_SUCCESS)
 383                         s->functions = mfc.nfn;
 384                 else
 385                         s->functions = 1;
 386                 s->config = kzalloc(sizeof(config_t) * s->functions,
 387                                     GFP_KERNEL);
 388                 if (!s->config) {
 389                         ret = -ENOMEM;
 390                         goto put_module;
 391                 }
 392         }
 393
 394         ret = p_drv->probe(p_dev);
 395
 396  put_module:
 397         if (ret)
 398                 module_put(p_drv->owner);
 399  put_dev:
 400         if (ret)
 401                 put_device(dev);
 402         return (ret);
 403 }
 404
 405
 406 static int pcmcia_device_remove(struct device * dev)
 407 {
 408         struct pcmcia_device *p_dev;
 409         struct pcmcia_driver *p_drv;
 410         int i;
 411
 412         /* detach the "instance" */
 413         p_dev = to_pcmcia_dev(dev);
 414         p_drv = to_pcmcia_drv(dev->driver);
 415         if (!p_drv)
 416                 return 0;
 417
 418         if (p_drv->remove)
 419                 p_drv->remove(p_dev);
 420
 421         /* check for proper unloading */
 422         if (p_dev->state & (CLIENT_IRQ_REQ|CLIENT_IO_REQ|CLIENT_CONFIG_LOCKED))
 423                 printk(KERN_INFO "pcmcia: driver %s did not release config properly\n",
 424                        p_drv->drv.name);
 425
 426         for (i = 0; i < MAX_WIN; i++)
 427                 if (p_dev->state & CLIENT_WIN_REQ(i))
 428                         printk(KERN_INFO "pcmcia: driver %s did not release windows properly\n",
 429                                p_drv->drv.name);
 430
 431         /* references from pcmcia_probe_device */
 432         p_dev->state = CLIENT_UNBOUND;
 433         pcmcia_put_dev(p_dev);
 434         module_put(p_drv->owner);
 435
 436         return 0;
 437 }
 438
 439
 440 /*
 441  * Removes a PCMCIA card from the device tree and socket list.
 442  */
 443 static void pcmcia_card_remove(struct pcmcia_socket *s)
 444 {
 445         struct pcmcia_device    *p_dev;
 446         unsigned long           flags;
 447
 448         ds_dbg(2, "unbind_request(%d)\n", s->sock);
 449
 450         s->device_count = 0;
 451
 452         for (;;) {
 453                 /* unregister all pcmcia_devices registered with this socket*/
 454                 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 455                 if (list_empty(&s->devices_list)) {
 456                         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 457                         return;
 458                 }
 459                 p_dev = list_entry((&s->devices_list)->next, struct pcmcia_device, socket_device_list);
 460                 list_del(&p_dev->socket_device_list);
 461                 p_dev->state |= CLIENT_STALE;
 462                 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 463
 464                 device_unregister(&p_dev->dev);
 465         }
 466
 467         return;
 468 } /* unbind_request */
 469
 470
 471 /*
 472  * pcmcia_device_query -- determine information about a pcmcia device
 473  */
 474 static int pcmcia_device_query(struct pcmcia_device *p_dev)
 475 {
 476         cistpl_manfid_t manf_id;
 477         cistpl_funcid_t func_id;
 478         cistpl_vers_1_t *vers1;
 479         unsigned int i;
 480
 481         vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL);
 482         if (!vers1)
 483                 return -ENOMEM;
 484
 485         if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 486                                CISTPL_MANFID, &manf_id)) {
 487                 p_dev->manf_id = manf_id.manf;
 488                 p_dev->card_id = manf_id.card;
 489                 p_dev->has_manf_id = 1;
 490                 p_dev->has_card_id = 1;
 491         }
 492
 493         if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 494                                CISTPL_FUNCID, &func_id)) {
 495                 p_dev->func_id = func_id.func;
 496                 p_dev->has_func_id = 1;
 497         } else {
 498                 /* rule of thumb: cards with no FUNCID, but with
 499                  * common memory device geometry information, are
 500                  * probably memory cards (from pcmcia-cs) */
 501                 cistpl_device_geo_t *devgeo;
 502
 503                 devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL);
 504                 if (!devgeo) {
 505                         kfree(vers1);
 506                         return -ENOMEM;
 507                 }
 508                 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 509                                       CISTPL_DEVICE_GEO, devgeo)) {
 510                         ds_dbg(0, "mem device geometry probably means "
 511                                "FUNCID_MEMORY\n");
 512                         p_dev->func_id = CISTPL_FUNCID_MEMORY;
 513                         p_dev->has_func_id = 1;
 514                 }
 515                 kfree(devgeo);
 516         }
 517
 518         if (!pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_VERS_1,
 519                                vers1)) {
 520                 for (i=0; i < vers1->ns; i++) {
 521                         char *tmp;
 522                         unsigned int length;
 523
 524                         tmp = vers1->str + vers1->ofs[i];
 525
 526                         length = strlen(tmp) + 1;
 527                         if ((length < 3) || (length > 255))
 528                                 continue;
 529
 530                         p_dev->prod_id[i] = kmalloc(sizeof(char) * length,
 531                                                     GFP_KERNEL);
 532                         if (!p_dev->prod_id[i])
 533                                 continue;
 534
 535                         p_dev->prod_id[i] = strncpy(p_dev->prod_id[i],
 536                                                     tmp, length);
 537                 }
 538         }
 539
 540         kfree(vers1);
 541         return 0;
 542 }
 543
 544
 545 /* device_add_lock is needed to avoid double registration by cardmgr and kernel.
 546  * Serializes pcmcia_device_add; will most likely be removed in future.
 547  *
 548  * While it has the caveat that adding new PCMCIA devices inside(!) device_register()
 549  * won't work, this doesn't matter much at the moment: the driver core doesn't
 550  * support it either.
 551  */
 552 static DECLARE_MUTEX(device_add_lock);
 553
 554 struct pcmcia_device * pcmcia_device_add(struct pcmcia_socket *s, unsigned int function)
 555 {
 556         struct pcmcia_device *p_dev;
 557         unsigned long flags;
 558         int bus_id_len;
 559
 560         s = pcmcia_get_socket(s);
 561         if (!s)
 562                 return NULL;
 563
 564         down(&device_add_lock);
 565
 566         /* max of 2 devices per card */
 567         if (s->device_count == 2)
 568                 goto err_put;
 569
 570         p_dev = kzalloc(sizeof(struct pcmcia_device), GFP_KERNEL);
 571         if (!p_dev)
 572                 goto err_put;
 573
 574         p_dev->socket = s;
 575         p_dev->device_no = (s->device_count++);
 576         p_dev->func   = function;
 577
 578         p_dev->dev.bus = &pcmcia_bus_type;
 579         p_dev->dev.parent = s->dev.dev;
 580         p_dev->dev.release = pcmcia_release_dev;
 581         bus_id_len = sprintf (p_dev->dev.bus_id, "%d.%d", p_dev->socket->sock, p_dev->device_no);
 582
 583         p_dev->devname = kmalloc(6 + bus_id_len + 1, GFP_KERNEL);
 584         if (!p_dev->devname)
 585                 goto err_free;
 586         sprintf (p_dev->devname, "pcmcia%s", p_dev->dev.bus_id);
 587
 588         /* compat */
 589         p_dev->state = CLIENT_UNBOUND;
 590
 591         /* Add to the list in pcmcia_bus_socket */
 592         spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 593         list_add_tail(&p_dev->socket_device_list, &s->devices_list);
 594         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 595
 596         printk(KERN_NOTICE "pcmcia: registering new device %s\n",
 597                p_dev->devname);
 598
 599         pcmcia_device_query(p_dev);
 600
 601         if (device_register(&p_dev->dev)) {
 602                 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 603                 list_del(&p_dev->socket_device_list);
 604                 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 605
 606                 goto err_free;
 607        }
 608
 609         up(&device_add_lock);
 610
 611         return p_dev;
 612
 613  err_free:
 614         kfree(p_dev->devname);
 615         kfree(p_dev);
 616         s->device_count--;
 617  err_put:
 618         up(&device_add_lock);
 619         pcmcia_put_socket(s);
 620
 621         return NULL;
 622 }
 623
 624
 625 static int pcmcia_card_add(struct pcmcia_socket *s)
 626 {
 627         cisinfo_t cisinfo;
 628         cistpl_longlink_mfc_t mfc;
 629         unsigned int no_funcs, i;
 630         int ret = 0;
 631
 632         if (!(s->resource_setup_done))
 633                 return -EAGAIN; /* try again, but later... */
 634
 635         if (pcmcia_validate_mem(s))
 636                 return -EAGAIN; /* try again, but later... */
 637
 638         ret = pccard_validate_cis(s, BIND_FN_ALL, &cisinfo);
 639         if (ret || !cisinfo.Chains) {
 640                 ds_dbg(0, "invalid CIS or invalid resources\n");
 641                 return -ENODEV;
 642         }
 643
 644         if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
 645                 no_funcs = mfc.nfn;
 646         else
 647                 no_funcs = 1;
 648
 649         for (i=0; i < no_funcs; i++)
 650                 pcmcia_device_add(s, i);
 651
 652         return (ret);
 653 }
 654
 655
 656 static void pcmcia_delayed_add_pseudo_device(void *data)
 657 {
 658         struct pcmcia_socket *s = data;
 659         pcmcia_device_add(s, 0);
 660         s->pcmcia_state.device_add_pending = 0;
 661 }
 662
 663 static inline void pcmcia_add_pseudo_device(struct pcmcia_socket *s)
 664 {
 665         if (!s->pcmcia_state.device_add_pending) {
 666                 s->pcmcia_state.device_add_pending = 1;
 667                 schedule_work(&s->device_add);
 668         }
 669         return;
 670 }
 671
 672 static int pcmcia_requery(struct device *dev, void * _data)
 673 {
 674         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 675         if (!p_dev->dev.driver)
 676                 pcmcia_device_query(p_dev);
 677
 678         return 0;
 679 }
 680
 681 static void pcmcia_bus_rescan(struct pcmcia_socket *skt)
 682 {
 683         int no_devices=0;
 684         unsigned long flags;
 685
 686         /* must be called with skt_sem held */
 687         spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 688         if (list_empty(&skt->devices_list))
 689                 no_devices=1;
 690         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 691
 692         /* if no devices were added for this socket yet because of
 693          * missing resource information or other trouble, we need to
 694          * do this now. */
 695         if (no_devices) {
 696                 int ret = pcmcia_card_add(skt);
 697                 if (ret)
 698                         return;
 699         }
 700
 701         /* some device information might have changed because of a CIS
 702          * update or because we can finally read it correctly... so
 703          * determine it again, overwriting old values if necessary. */
 704         bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery);
 705
 706         /* we re-scan all devices, not just the ones connected to this
 707          * socket. This does not matter, though. */
 708         bus_rescan_devices(&pcmcia_bus_type);
 709 }
 710
 711 static inline int pcmcia_devmatch(struct pcmcia_device *dev,
 712                                   struct pcmcia_device_id *did)
 713 {
 714         if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
 715                 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
 716                         return 0;
 717         }
 718
 719         if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
 720                 if ((!dev->has_card_id) || (dev->card_id != did->card_id))
 721                         return 0;
 722         }
 723
 724         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
 725                 if (dev->func != did->function)
 726                         return 0;
 727         }
 728
 729         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
 730                 if (!dev->prod_id[0])
 731                         return 0;
 732                 if (strcmp(did->prod_id[0], dev->prod_id[0]))
 733                         return 0;
 734         }
 735
 736         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
 737                 if (!dev->prod_id[1])
 738                         return 0;
 739                 if (strcmp(did->prod_id[1], dev->prod_id[1]))
 740                         return 0;
 741         }
 742
 743         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
 744                 if (!dev->prod_id[2])
 745                         return 0;
 746                 if (strcmp(did->prod_id[2], dev->prod_id[2]))
 747                         return 0;
 748         }
 749
 750         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
 751                 if (!dev->prod_id[3])
 752                         return 0;
 753                 if (strcmp(did->prod_id[3], dev->prod_id[3]))
 754                         return 0;
 755         }
 756
 757         if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
 758                 /* handle pseudo multifunction devices:
 759                  * there are at most two pseudo multifunction devices.
 760                  * if we're matching against the first, schedule a
 761                  * call which will then check whether there are two
 762                  * pseudo devices, and if not, add the second one.
 763                  */
 764                 if (dev->device_no == 0)
 765                         pcmcia_add_pseudo_device(dev->socket);
 766
 767                 if (dev->device_no != did->device_no)
 768                         return 0;
 769         }
 770
 771         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
 772                 if ((!dev->has_func_id) || (dev->func_id != did->func_id))
 773                         return 0;
 774
 775                 /* if this is a pseudo-multi-function device,
 776                  * we need explicit matches */
 777                 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO)
 778                         return 0;
 779                 if (dev->device_no)
 780                         return 0;
 781
 782                 /* also, FUNC_ID matching needs to be activated by userspace
 783                  * after it has re-checked that there is no possible module
 784                  * with a prod_id/manf_id/card_id match.
 785                  */
 786                 if (!dev->allow_func_id_match)
 787                         return 0;
 788         }
 789
 790         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
 791                 if (!dev->socket->fake_cis)
 792                         pcmcia_load_firmware(dev, did->cisfile);
 793
 794                 if (!dev->socket->fake_cis)
 795                         return 0;
 796         }
 797
 798         if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
 799                 int i;
 800                 for (i=0; i<4; i++)
 801                         if (dev->prod_id[i])
 802                                 return 0;
 803                 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
 804                         return 0;
 805         }
 806
 807         dev->dev.driver_data = (void *) did;
 808
 809         return 1;
 810 }
 811
 812
 813 static int pcmcia_bus_match(struct device * dev, struct device_driver * drv) {
 814         struct pcmcia_device * p_dev = to_pcmcia_dev(dev);
 815         struct pcmcia_driver * p_drv = to_pcmcia_drv(drv);
 816         struct pcmcia_device_id *did = p_drv->id_table;
 817
 818         /* matching by cardmgr */
 819         if (p_dev->cardmgr == p_drv)
 820                 return 1;
 821
 822         while (did && did->match_flags) {
 823                 if (pcmcia_devmatch(p_dev, did))
 824                         return 1;
 825                 did++;
 826         }
 827
 828         return 0;
 829 }
 830
 831 #ifdef CONFIG_HOTPLUG
 832
 833 static int pcmcia_bus_uevent(struct device *dev, char **envp, int num_envp,
 834                              char *buffer, int buffer_size)
 835 {
 836         struct pcmcia_device *p_dev;
 837         int i, length = 0;
 838         u32 hash[4] = { 0, 0, 0, 0};
 839
 840         if (!dev)
 841                 return -ENODEV;
 842
 843         p_dev = to_pcmcia_dev(dev);
 844
 845         /* calculate hashes */
 846         for (i=0; i<4; i++) {
 847                 if (!p_dev->prod_id[i])
 848                         continue;
 849                 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
 850         }
 851
 852         i = 0;
 853
 854         if (add_uevent_var(envp, num_envp, &i,
 855                            buffer, buffer_size, &length,
 856                            "SOCKET_NO=%u",
 857                            p_dev->socket->sock))
 858                 return -ENOMEM;
 859
 860         if (add_uevent_var(envp, num_envp, &i,
 861                            buffer, buffer_size, &length,
 862                            "DEVICE_NO=%02X",
 863                            p_dev->device_no))
 864                 return -ENOMEM;
 865
 866         if (add_uevent_var(envp, num_envp, &i,
 867                            buffer, buffer_size, &length,
 868                            "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
 869                            "pa%08Xpb%08Xpc%08Xpd%08X",
 870                            p_dev->has_manf_id ? p_dev->manf_id : 0,
 871                            p_dev->has_card_id ? p_dev->card_id : 0,
 872                            p_dev->has_func_id ? p_dev->func_id : 0,
 873                            p_dev->func,
 874                            p_dev->device_no,
 875                            hash[0],
 876                            hash[1],
 877                            hash[2],
 878                            hash[3]))
 879                 return -ENOMEM;
 880
 881         envp[i] = NULL;
 882
 883         return 0;
 884 }
 885
 886 #else
 887
 888 static int pcmcia_bus_uevent(struct device *dev, char **envp, int num_envp,
 889                               char *buffer, int buffer_size)
 890 {
 891         return -ENODEV;
 892 }
 893
 894 #endif
 895
 896 /************************ per-device sysfs output ***************************/
 897
 898 #define pcmcia_device_attr(field, test, format)                         \
 899 static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf)              \
 900 {                                                                       \
 901         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);               \
 902         return p_dev->test ? sprintf (buf, format, p_dev->field) : -ENODEV; \
 903 }
 904
 905 #define pcmcia_device_stringattr(name, field)                                   \
 906 static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf)               \
 907 {                                                                       \
 908         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);               \
 909         return p_dev->field ? sprintf (buf, "%s\n", p_dev->field) : -ENODEV; \
 910 }
 911
 912 pcmcia_device_attr(func, socket, "0x%02x\n");
 913 pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
 914 pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
 915 pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
 916 pcmcia_device_stringattr(prod_id1, prod_id[0]);
 917 pcmcia_device_stringattr(prod_id2, prod_id[1]);
 918 pcmcia_device_stringattr(prod_id3, prod_id[2]);
 919 pcmcia_device_stringattr(prod_id4, prod_id[3]);
 920
 921
 922 static ssize_t pcmcia_show_pm_state(struct device *dev, struct device_attribute *attr, char *buf)
 923 {
 924         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 925
 926         if (p_dev->dev.power.power_state.event != PM_EVENT_ON)
 927                 return sprintf(buf, "off\n");
 928         else
 929                 return sprintf(buf, "on\n");
 930 }
 931
 932 static ssize_t pcmcia_store_pm_state(struct device *dev, struct device_attribute *attr,
 933                                      const char *buf, size_t count)
 934 {
 935         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 936         int ret = 0;
 937
 938         if (!count)
 939                 return -EINVAL;
 940
 941         if ((p_dev->dev.power.power_state.event == PM_EVENT_ON) &&
 942             (!strncmp(buf, "off", 3)))
 943                 ret = dpm_runtime_suspend(dev, PMSG_SUSPEND);
 944         else if ((p_dev->dev.power.power_state.event != PM_EVENT_ON) &&
 945                  (!strncmp(buf, "on", 2)))
 946                 dpm_runtime_resume(dev);
 947
 948         return ret ? ret : count;
 949 }
 950
 951
 952 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
 953 {
 954         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 955         int i;
 956         u32 hash[4] = { 0, 0, 0, 0};
 957
 958         /* calculate hashes */
 959         for (i=0; i<4; i++) {
 960                 if (!p_dev->prod_id[i])
 961                         continue;
 962                 hash[i] = crc32(0,p_dev->prod_id[i],strlen(p_dev->prod_id[i]));
 963         }
 964         return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
 965                                 "pa%08Xpb%08Xpc%08Xpd%08X\n",
 966                                 p_dev->has_manf_id ? p_dev->manf_id : 0,
 967                                 p_dev->has_card_id ? p_dev->card_id : 0,
 968                                 p_dev->has_func_id ? p_dev->func_id : 0,
 969                                 p_dev->func, p_dev->device_no,
 970                                 hash[0], hash[1], hash[2], hash[3]);
 971 }
 972
 973 static ssize_t pcmcia_store_allow_func_id_match(struct device *dev,
 974                 struct device_attribute *attr, const char *buf, size_t count)
 975 {
 976         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 977
 978         if (!count)
 979                 return -EINVAL;
 980
 981         down(&p_dev->socket->skt_sem);
 982         p_dev->allow_func_id_match = 1;
 983         up(&p_dev->socket->skt_sem);
 984
 985         bus_rescan_devices(&pcmcia_bus_type);
 986
 987         return count;
 988 }
 989
 990 static struct device_attribute pcmcia_dev_attrs[] = {
 991         __ATTR(function, 0444, func_show, NULL),
 992         __ATTR(pm_state, 0644, pcmcia_show_pm_state, pcmcia_store_pm_state),
 993         __ATTR_RO(func_id),
 994         __ATTR_RO(manf_id),
 995         __ATTR_RO(card_id),
 996         __ATTR_RO(prod_id1),
 997         __ATTR_RO(prod_id2),
 998         __ATTR_RO(prod_id3),
 999         __ATTR_RO(prod_id4),
1000         __ATTR_RO(modalias),
1001         __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match),
1002         __ATTR_NULL,
1003 };
1004
1005 /* PM support, also needed for reset */
1006
1007 static int pcmcia_dev_suspend(struct device * dev, pm_message_t state)
1008 {
1009         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1010         struct pcmcia_driver *p_drv = NULL;
1011
1012         if (dev->driver)
1013                 p_drv = to_pcmcia_drv(dev->driver);
1014
1015         if (p_drv && p_drv->suspend)
1016                 return p_drv->suspend(p_dev);
1017
1018         return 0;
1019 }
1020
1021
1022 static int pcmcia_dev_resume(struct device * dev)
1023 {
1024         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1025         struct pcmcia_driver *p_drv = NULL;
1026
1027         if (dev->driver)
1028                 p_drv = to_pcmcia_drv(dev->driver);
1029
1030         if (p_drv && p_drv->resume)
1031                 return p_drv->resume(p_dev);
1032
1033         return 0;
1034 }
1035
1036
1037 static int pcmcia_bus_suspend_callback(struct device *dev, void * _data)
1038 {
1039         struct pcmcia_socket *skt = _data;
1040         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1041
1042         if (p_dev->socket != skt)
1043                 return 0;
1044
1045         return dpm_runtime_suspend(dev, PMSG_SUSPEND);
1046 }
1047
1048 static int pcmcia_bus_resume_callback(struct device *dev, void * _data)
1049 {
1050         struct pcmcia_socket *skt = _data;
1051         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1052
1053         if (p_dev->socket != skt)
1054                 return 0;
1055
1056         dpm_runtime_resume(dev);
1057
1058         return 0;
1059 }
1060
1061 static int pcmcia_bus_resume(struct pcmcia_socket *skt)
1062 {
1063         bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback);
1064         return 0;
1065 }
1066
1067 static int pcmcia_bus_suspend(struct pcmcia_socket *skt)
1068 {
1069         if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt,
1070                              pcmcia_bus_suspend_callback)) {
1071                 pcmcia_bus_resume(skt);
1072                 return -EIO;
1073         }
1074         return 0;
1075 }
1076
1077
1078 /*======================================================================
1079
1080     The card status event handler.
1081
1082 ======================================================================*/
1083
1084 /* Normally, the event is passed to individual drivers after
1085  * informing userspace. Only for CS_EVENT_CARD_REMOVAL this
1086  * is inversed to maintain historic compatibility.
1087  */
1088
1089 static int ds_event(struct pcmcia_socket *skt, event_t event, int priority)
1090 {
1091         struct pcmcia_socket *s = pcmcia_get_socket(skt);
1092
1093         ds_dbg(1, "ds_event(0x%06x, %d, 0x%p)\n",
1094                event, priority, skt);
1095
1096         switch (event) {
1097         case CS_EVENT_CARD_REMOVAL:
1098                 s->pcmcia_state.present = 0;
1099                 pcmcia_card_remove(skt);
1100                 handle_event(skt, event);
1101                 break;
1102
1103         case CS_EVENT_CARD_INSERTION:
1104                 s->pcmcia_state.present = 1;
1105                 pcmcia_card_add(skt);
1106                 handle_event(skt, event);
1107                 break;
1108
1109         case CS_EVENT_EJECTION_REQUEST:
1110                 break;
1111
1112         case CS_EVENT_PM_SUSPEND:
1113         case CS_EVENT_PM_RESUME:
1114         case CS_EVENT_RESET_PHYSICAL:
1115         case CS_EVENT_CARD_RESET:
1116         default:
1117                 handle_event(skt, event);
1118                 break;
1119     }
1120
1121     pcmcia_put_socket(s);
1122
1123     return 0;
1124 } /* ds_event */
1125
1126
1127 static struct pcmcia_callback pcmcia_bus_callback = {
1128         .owner = THIS_MODULE,
1129         .event = ds_event,
1130         .requery = pcmcia_bus_rescan,
1131         .suspend = pcmcia_bus_suspend,
1132         .resume = pcmcia_bus_resume,
1133 };
1134
1135 static int __devinit pcmcia_bus_add_socket(struct class_device *class_dev,
1136                                            struct class_interface *class_intf)
1137 {
1138         struct pcmcia_socket *socket = class_get_devdata(class_dev);
1139         int ret;
1140
1141         socket = pcmcia_get_socket(socket);
1142         if (!socket) {
1143                 printk(KERN_ERR "PCMCIA obtaining reference to socket %p failed\n", socket);
1144                 return -ENODEV;
1145         }
1146
1147         /*
1148          * Ugly. But we want to wait for the socket threads to have started up.
1149          * We really should let the drivers themselves drive some of this..
1150          */
1151         msleep(250);
1152
1153 #ifdef CONFIG_PCMCIA_IOCTL
1154         init_waitqueue_head(&socket->queue);
1155 #endif
1156         INIT_LIST_HEAD(&socket->devices_list);
1157         INIT_WORK(&socket->device_add, pcmcia_delayed_add_pseudo_device, socket);
1158         memset(&socket->pcmcia_state, 0, sizeof(u8));
1159         socket->device_count = 0;
1160
1161         ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback);
1162         if (ret) {
1163                 printk(KERN_ERR "PCMCIA registration PCCard core failed for socket %p\n", socket);
1164                 pcmcia_put_socket(socket);
1165                 return (ret);
1166         }
1167
1168         return 0;
1169 }
1170
1171 static void pcmcia_bus_remove_socket(struct class_device *class_dev,
1172                                      struct class_interface *class_intf)
1173 {
1174         struct pcmcia_socket *socket = class_get_devdata(class_dev);
1175
1176         if (!socket)
1177                 return;
1178
1179         socket->pcmcia_state.dead = 1;
1180         pccard_register_pcmcia(socket, NULL);
1181
1182         pcmcia_put_socket(socket);
1183
1184         return;
1185 }
1186
1187
1188 /* the pcmcia_bus_interface is used to handle pcmcia socket devices */
1189 static struct class_interface pcmcia_bus_interface = {
1190         .class = &pcmcia_socket_class,
1191         .add = &pcmcia_bus_add_socket,
1192         .remove = &pcmcia_bus_remove_socket,
1193 };
1194
1195
1196 struct bus_type pcmcia_bus_type = {
1197         .name = "pcmcia",
1198         .uevent = pcmcia_bus_uevent,
1199         .match = pcmcia_bus_match,
1200         .dev_attrs = pcmcia_dev_attrs,
1201         .probe = pcmcia_device_probe,
1202         .remove = pcmcia_device_remove,
1203         .suspend = pcmcia_dev_suspend,
1204         .resume = pcmcia_dev_resume,
1205 };
1206
1207
1208 static int __init init_pcmcia_bus(void)
1209 {
1210         spin_lock_init(&pcmcia_dev_list_lock);
1211
1212         bus_register(&pcmcia_bus_type);
1213         class_interface_register(&pcmcia_bus_interface);
1214
1215         pcmcia_setup_ioctl();
1216
1217         return 0;
1218 }
1219 fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that
1220                                * pcmcia_socket_class is already registered */
1221
1222
1223 static void __exit exit_pcmcia_bus(void)
1224 {
1225         pcmcia_cleanup_ioctl();
1226
1227         class_interface_unregister(&pcmcia_bus_interface);
1228
1229         bus_unregister(&pcmcia_bus_type);
1230 }
1231 module_exit(exit_pcmcia_bus);
1232
1233
1234 MODULE_ALIAS("ds");