err.no 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 = kmalloc(sizeof(cisdump_t), GFP_KERNEL);
 268                 if (!cis)
 269                         goto release;
 270
 271                 memset(cis, 0, sizeof(cisdump_t));
 272
 273                 cis->Length = fw->size + 1;
 274                 memcpy(cis->Data, fw->data, fw->size);
 275
 276                 if (!pcmcia_replace_cis(s, cis))
 277                         ret = 0;
 278         }
 279  release:
 280         release_firmware(fw);
 281
 282         return (ret);
 283 }
 284
 285 #else /* !CONFIG_PCMCIA_LOAD_CIS */
 286
 287 static inline int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
 288 {
 289         return -ENODEV;
 290 }
 291
 292 #endif
 293
 294
 295 /*======================================================================*/
 296
 297
 298 /**
 299  * pcmcia_register_driver - register a PCMCIA driver with the bus core
 300  *
 301  * Registers a PCMCIA driver with the PCMCIA bus core.
 302  */
 303 static int pcmcia_device_probe(struct device *dev);
 304 static int pcmcia_device_remove(struct device * dev);
 305
 306 int pcmcia_register_driver(struct pcmcia_driver *driver)
 307 {
 308         if (!driver)
 309                 return -EINVAL;
 310
 311         pcmcia_check_driver(driver);
 312
 313         /* initialize common fields */
 314         driver->drv.bus = &pcmcia_bus_type;
 315         driver->drv.owner = driver->owner;
 316         driver->drv.probe = pcmcia_device_probe;
 317         driver->drv.remove = pcmcia_device_remove;
 318
 319         return driver_register(&driver->drv);
 320 }
 321 EXPORT_SYMBOL(pcmcia_register_driver);
 322
 323 /**
 324  * pcmcia_unregister_driver - unregister a PCMCIA driver with the bus core
 325  */
 326 void pcmcia_unregister_driver(struct pcmcia_driver *driver)
 327 {
 328         driver_unregister(&driver->drv);
 329 }
 330 EXPORT_SYMBOL(pcmcia_unregister_driver);
 331
 332
 333 /* pcmcia_device handling */
 334
 335 struct pcmcia_device * pcmcia_get_dev(struct pcmcia_device *p_dev)
 336 {
 337         struct device *tmp_dev;
 338         tmp_dev = get_device(&p_dev->dev);
 339         if (!tmp_dev)
 340                 return NULL;
 341         return to_pcmcia_dev(tmp_dev);
 342 }
 343
 344 void pcmcia_put_dev(struct pcmcia_device *p_dev)
 345 {
 346         if (p_dev)
 347                 put_device(&p_dev->dev);
 348 }
 349
 350 static void pcmcia_release_dev(struct device *dev)
 351 {
 352         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 353         ds_dbg(1, "releasing dev %p\n", p_dev);
 354         pcmcia_put_socket(p_dev->socket);
 355         kfree(p_dev->devname);
 356         kfree(p_dev);
 357 }
 358
 359
 360 static int pcmcia_device_probe(struct device * dev)
 361 {
 362         struct pcmcia_device *p_dev;
 363         struct pcmcia_driver *p_drv;
 364         struct pcmcia_socket *s;
 365         int ret = 0;
 366
 367         dev = get_device(dev);
 368         if (!dev)
 369                 return -ENODEV;
 370
 371         p_dev = to_pcmcia_dev(dev);
 372         p_drv = to_pcmcia_drv(dev->driver);
 373         s = p_dev->socket;
 374
 375         if ((!p_drv->probe) || (!try_module_get(p_drv->owner))) {
 376                 ret = -EINVAL;
 377                 goto put_dev;
 378         }
 379
 380         p_dev->state &= ~CLIENT_UNBOUND;
 381
 382         /* set up the device configuration, if it hasn't been done before */
 383         if (!s->functions) {
 384                 cistpl_longlink_mfc_t mfc;
 385                 if (pccard_read_tuple(s, p_dev->func, CISTPL_LONGLINK_MFC,
 386                                       &mfc) == CS_SUCCESS)
 387                         s->functions = mfc.nfn;
 388                 else
 389                         s->functions = 1;
 390                 s->config = kmalloc(sizeof(config_t) * s->functions,
 391                                     GFP_KERNEL);
 392                 if (!s->config) {
 393                         ret = -ENOMEM;
 394                         goto put_module;
 395                 }
 396                 memset(s->config, 0, sizeof(config_t) * s->functions);
 397         }
 398
 399         ret = p_drv->probe(p_dev);
 400
 401  put_module:
 402         if (ret)
 403                 module_put(p_drv->owner);
 404  put_dev:
 405         if (ret)
 406                 put_device(dev);
 407         return (ret);
 408 }
 409
 410
 411 static int pcmcia_device_remove(struct device * dev)
 412 {
 413         struct pcmcia_device *p_dev;
 414         struct pcmcia_driver *p_drv;
 415         int i;
 416
 417         /* detach the "instance" */
 418         p_dev = to_pcmcia_dev(dev);
 419         p_drv = to_pcmcia_drv(dev->driver);
 420         if (!p_drv)
 421                 return 0;
 422
 423         if (p_drv->remove)
 424                 p_drv->remove(p_dev);
 425
 426         /* check for proper unloading */
 427         if (p_dev->state & (CLIENT_IRQ_REQ|CLIENT_IO_REQ|CLIENT_CONFIG_LOCKED))
 428                 printk(KERN_INFO "pcmcia: driver %s did not release config properly\n",
 429                        p_drv->drv.name);
 430
 431         for (i = 0; i < MAX_WIN; i++)
 432                 if (p_dev->state & CLIENT_WIN_REQ(i))
 433                         printk(KERN_INFO "pcmcia: driver %s did not release windows properly\n",
 434                                p_drv->drv.name);
 435
 436         /* references from pcmcia_probe_device */
 437         p_dev->state = CLIENT_UNBOUND;
 438         pcmcia_put_dev(p_dev);
 439         module_put(p_drv->owner);
 440
 441         return 0;
 442 }
 443
 444
 445 /*
 446  * Removes a PCMCIA card from the device tree and socket list.
 447  */
 448 static void pcmcia_card_remove(struct pcmcia_socket *s)
 449 {
 450         struct pcmcia_device    *p_dev;
 451         unsigned long           flags;
 452
 453         ds_dbg(2, "unbind_request(%d)\n", s->sock);
 454
 455         s->device_count = 0;
 456
 457         for (;;) {
 458                 /* unregister all pcmcia_devices registered with this socket*/
 459                 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 460                 if (list_empty(&s->devices_list)) {
 461                         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 462                         return;
 463                 }
 464                 p_dev = list_entry((&s->devices_list)->next, struct pcmcia_device, socket_device_list);
 465                 list_del(&p_dev->socket_device_list);
 466                 p_dev->state |= CLIENT_STALE;
 467                 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 468
 469                 device_unregister(&p_dev->dev);
 470         }
 471
 472         return;
 473 } /* unbind_request */
 474
 475
 476 /*
 477  * pcmcia_device_query -- determine information about a pcmcia device
 478  */
 479 static int pcmcia_device_query(struct pcmcia_device *p_dev)
 480 {
 481         cistpl_manfid_t manf_id;
 482         cistpl_funcid_t func_id;
 483         cistpl_vers_1_t *vers1;
 484         unsigned int i;
 485
 486         vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL);
 487         if (!vers1)
 488                 return -ENOMEM;
 489
 490         if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 491                                CISTPL_MANFID, &manf_id)) {
 492                 p_dev->manf_id = manf_id.manf;
 493                 p_dev->card_id = manf_id.card;
 494                 p_dev->has_manf_id = 1;
 495                 p_dev->has_card_id = 1;
 496         }
 497
 498         if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 499                                CISTPL_FUNCID, &func_id)) {
 500                 p_dev->func_id = func_id.func;
 501                 p_dev->has_func_id = 1;
 502         } else {
 503                 /* rule of thumb: cards with no FUNCID, but with
 504                  * common memory device geometry information, are
 505                  * probably memory cards (from pcmcia-cs) */
 506                 cistpl_device_geo_t *devgeo;
 507
 508                 devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL);
 509                 if (!devgeo) {
 510                         kfree(vers1);
 511                         return -ENOMEM;
 512                 }
 513                 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 514                                       CISTPL_DEVICE_GEO, devgeo)) {
 515                         ds_dbg(0, "mem device geometry probably means "
 516                                "FUNCID_MEMORY\n");
 517                         p_dev->func_id = CISTPL_FUNCID_MEMORY;
 518                         p_dev->has_func_id = 1;
 519                 }
 520                 kfree(devgeo);
 521         }
 522
 523         if (!pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_VERS_1,
 524                                vers1)) {
 525                 for (i=0; i < vers1->ns; i++) {
 526                         char *tmp;
 527                         unsigned int length;
 528
 529                         tmp = vers1->str + vers1->ofs[i];
 530
 531                         length = strlen(tmp) + 1;
 532                         if ((length < 3) || (length > 255))
 533                                 continue;
 534
 535                         p_dev->prod_id[i] = kmalloc(sizeof(char) * length,
 536                                                     GFP_KERNEL);
 537                         if (!p_dev->prod_id[i])
 538                                 continue;
 539
 540                         p_dev->prod_id[i] = strncpy(p_dev->prod_id[i],
 541                                                     tmp, length);
 542                 }
 543         }
 544
 545         kfree(vers1);
 546         return 0;
 547 }
 548
 549
 550 /* device_add_lock is needed to avoid double registration by cardmgr and kernel.
 551  * Serializes pcmcia_device_add; will most likely be removed in future.
 552  *
 553  * While it has the caveat that adding new PCMCIA devices inside(!) device_register()
 554  * won't work, this doesn't matter much at the moment: the driver core doesn't
 555  * support it either.
 556  */
 557 static DECLARE_MUTEX(device_add_lock);
 558
 559 struct pcmcia_device * pcmcia_device_add(struct pcmcia_socket *s, unsigned int function)
 560 {
 561         struct pcmcia_device *p_dev;
 562         unsigned long flags;
 563         int bus_id_len;
 564
 565         s = pcmcia_get_socket(s);
 566         if (!s)
 567                 return NULL;
 568
 569         down(&device_add_lock);
 570
 571         /* max of 2 devices per card */
 572         if (s->device_count == 2)
 573                 goto err_put;
 574
 575         p_dev = kmalloc(sizeof(struct pcmcia_device), GFP_KERNEL);
 576         if (!p_dev)
 577                 goto err_put;
 578         memset(p_dev, 0, sizeof(struct pcmcia_device));
 579
 580         p_dev->socket = s;
 581         p_dev->device_no = (s->device_count++);
 582         p_dev->func   = function;
 583
 584         p_dev->dev.bus = &pcmcia_bus_type;
 585         p_dev->dev.parent = s->dev.dev;
 586         p_dev->dev.release = pcmcia_release_dev;
 587         bus_id_len = sprintf (p_dev->dev.bus_id, "%d.%d", p_dev->socket->sock, p_dev->device_no);
 588
 589         p_dev->devname = kmalloc(6 + bus_id_len + 1, GFP_KERNEL);
 590         if (!p_dev->devname)
 591                 goto err_free;
 592         sprintf (p_dev->devname, "pcmcia%s", p_dev->dev.bus_id);
 593
 594         /* compat */
 595         p_dev->state = CLIENT_UNBOUND;
 596
 597         /* Add to the list in pcmcia_bus_socket */
 598         spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 599         list_add_tail(&p_dev->socket_device_list, &s->devices_list);
 600         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 601
 602         printk(KERN_NOTICE "pcmcia: registering new device %s\n",
 603                p_dev->devname);
 604
 605         pcmcia_device_query(p_dev);
 606
 607         if (device_register(&p_dev->dev)) {
 608                 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 609                 list_del(&p_dev->socket_device_list);
 610                 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 611
 612                 goto err_free;
 613        }
 614
 615         up(&device_add_lock);
 616
 617         return p_dev;
 618
 619  err_free:
 620         kfree(p_dev->devname);
 621         kfree(p_dev);
 622         s->device_count--;
 623  err_put:
 624         up(&device_add_lock);
 625         pcmcia_put_socket(s);
 626
 627         return NULL;
 628 }
 629
 630
 631 static int pcmcia_card_add(struct pcmcia_socket *s)
 632 {
 633         cisinfo_t cisinfo;
 634         cistpl_longlink_mfc_t mfc;
 635         unsigned int no_funcs, i;
 636         int ret = 0;
 637
 638         if (!(s->resource_setup_done))
 639                 return -EAGAIN; /* try again, but later... */
 640
 641         if (pcmcia_validate_mem(s))
 642                 return -EAGAIN; /* try again, but later... */
 643
 644         ret = pccard_validate_cis(s, BIND_FN_ALL, &cisinfo);
 645         if (ret || !cisinfo.Chains) {
 646                 ds_dbg(0, "invalid CIS or invalid resources\n");
 647                 return -ENODEV;
 648         }
 649
 650         if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
 651                 no_funcs = mfc.nfn;
 652         else
 653                 no_funcs = 1;
 654
 655         for (i=0; i < no_funcs; i++)
 656                 pcmcia_device_add(s, i);
 657
 658         return (ret);
 659 }
 660
 661
 662 static void pcmcia_delayed_add_pseudo_device(void *data)
 663 {
 664         struct pcmcia_socket *s = data;
 665         pcmcia_device_add(s, 0);
 666         s->pcmcia_state.device_add_pending = 0;
 667 }
 668
 669 static inline void pcmcia_add_pseudo_device(struct pcmcia_socket *s)
 670 {
 671         if (!s->pcmcia_state.device_add_pending) {
 672                 s->pcmcia_state.device_add_pending = 1;
 673                 schedule_work(&s->device_add);
 674         }
 675         return;
 676 }
 677
 678 static int pcmcia_requery(struct device *dev, void * _data)
 679 {
 680         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 681         if (!p_dev->dev.driver)
 682                 pcmcia_device_query(p_dev);
 683
 684         return 0;
 685 }
 686
 687 static void pcmcia_bus_rescan(struct pcmcia_socket *skt)
 688 {
 689         int no_devices=0;
 690         unsigned long flags;
 691
 692         /* must be called with skt_sem held */
 693         spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 694         if (list_empty(&skt->devices_list))
 695                 no_devices=1;
 696         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 697
 698         /* if no devices were added for this socket yet because of
 699          * missing resource information or other trouble, we need to
 700          * do this now. */
 701         if (no_devices) {
 702                 int ret = pcmcia_card_add(skt);
 703                 if (ret)
 704                         return;
 705         }
 706
 707         /* some device information might have changed because of a CIS
 708          * update or because we can finally read it correctly... so
 709          * determine it again, overwriting old values if necessary. */
 710         bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery);
 711
 712         /* we re-scan all devices, not just the ones connected to this
 713          * socket. This does not matter, though. */
 714         bus_rescan_devices(&pcmcia_bus_type);
 715 }
 716
 717 static inline int pcmcia_devmatch(struct pcmcia_device *dev,
 718                                   struct pcmcia_device_id *did)
 719 {
 720         if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
 721                 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
 722                         return 0;
 723         }
 724
 725         if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
 726                 if ((!dev->has_card_id) || (dev->card_id != did->card_id))
 727                         return 0;
 728         }
 729
 730         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
 731                 if (dev->func != did->function)
 732                         return 0;
 733         }
 734
 735         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
 736                 if (!dev->prod_id[0])
 737                         return 0;
 738                 if (strcmp(did->prod_id[0], dev->prod_id[0]))
 739                         return 0;
 740         }
 741
 742         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
 743                 if (!dev->prod_id[1])
 744                         return 0;
 745                 if (strcmp(did->prod_id[1], dev->prod_id[1]))
 746                         return 0;
 747         }
 748
 749         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
 750                 if (!dev->prod_id[2])
 751                         return 0;
 752                 if (strcmp(did->prod_id[2], dev->prod_id[2]))
 753                         return 0;
 754         }
 755
 756         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
 757                 if (!dev->prod_id[3])
 758                         return 0;
 759                 if (strcmp(did->prod_id[3], dev->prod_id[3]))
 760                         return 0;
 761         }
 762
 763         if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
 764                 /* handle pseudo multifunction devices:
 765                  * there are at most two pseudo multifunction devices.
 766                  * if we're matching against the first, schedule a
 767                  * call which will then check whether there are two
 768                  * pseudo devices, and if not, add the second one.
 769                  */
 770                 if (dev->device_no == 0)
 771                         pcmcia_add_pseudo_device(dev->socket);
 772
 773                 if (dev->device_no != did->device_no)
 774                         return 0;
 775         }
 776
 777         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
 778                 if ((!dev->has_func_id) || (dev->func_id != did->func_id))
 779                         return 0;
 780
 781                 /* if this is a pseudo-multi-function device,
 782                  * we need explicit matches */
 783                 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO)
 784                         return 0;
 785                 if (dev->device_no)
 786                         return 0;
 787
 788                 /* also, FUNC_ID matching needs to be activated by userspace
 789                  * after it has re-checked that there is no possible module
 790                  * with a prod_id/manf_id/card_id match.
 791                  */
 792                 if (!dev->allow_func_id_match)
 793                         return 0;
 794         }
 795
 796         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
 797                 if (!dev->socket->fake_cis)
 798                         pcmcia_load_firmware(dev, did->cisfile);
 799
 800                 if (!dev->socket->fake_cis)
 801                         return 0;
 802         }
 803
 804         if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
 805                 int i;
 806                 for (i=0; i<4; i++)
 807                         if (dev->prod_id[i])
 808                                 return 0;
 809                 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
 810                         return 0;
 811         }
 812
 813         dev->dev.driver_data = (void *) did;
 814
 815         return 1;
 816 }
 817
 818
 819 static int pcmcia_bus_match(struct device * dev, struct device_driver * drv) {
 820         struct pcmcia_device * p_dev = to_pcmcia_dev(dev);
 821         struct pcmcia_driver * p_drv = to_pcmcia_drv(drv);
 822         struct pcmcia_device_id *did = p_drv->id_table;
 823
 824         /* matching by cardmgr */
 825         if (p_dev->cardmgr == p_drv)
 826                 return 1;
 827
 828         while (did && did->match_flags) {
 829                 if (pcmcia_devmatch(p_dev, did))
 830                         return 1;
 831                 did++;
 832         }
 833
 834         return 0;
 835 }
 836
 837 #ifdef CONFIG_HOTPLUG
 838
 839 static int pcmcia_bus_uevent(struct device *dev, char **envp, int num_envp,
 840                              char *buffer, int buffer_size)
 841 {
 842         struct pcmcia_device *p_dev;
 843         int i, length = 0;
 844         u32 hash[4] = { 0, 0, 0, 0};
 845
 846         if (!dev)
 847                 return -ENODEV;
 848
 849         p_dev = to_pcmcia_dev(dev);
 850
 851         /* calculate hashes */
 852         for (i=0; i<4; i++) {
 853                 if (!p_dev->prod_id[i])
 854                         continue;
 855                 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
 856         }
 857
 858         i = 0;
 859
 860         if (add_uevent_var(envp, num_envp, &i,
 861                            buffer, buffer_size, &length,
 862                            "SOCKET_NO=%u",
 863                            p_dev->socket->sock))
 864                 return -ENOMEM;
 865
 866         if (add_uevent_var(envp, num_envp, &i,
 867                            buffer, buffer_size, &length,
 868                            "DEVICE_NO=%02X",
 869                            p_dev->device_no))
 870                 return -ENOMEM;
 871
 872         if (add_uevent_var(envp, num_envp, &i,
 873                            buffer, buffer_size, &length,
 874                            "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
 875                            "pa%08Xpb%08Xpc%08Xpd%08X",
 876                            p_dev->has_manf_id ? p_dev->manf_id : 0,
 877                            p_dev->has_card_id ? p_dev->card_id : 0,
 878                            p_dev->has_func_id ? p_dev->func_id : 0,
 879                            p_dev->func,
 880                            p_dev->device_no,
 881                            hash[0],
 882                            hash[1],
 883                            hash[2],
 884                            hash[3]))
 885                 return -ENOMEM;
 886
 887         envp[i] = NULL;
 888
 889         return 0;
 890 }
 891
 892 #else
 893
 894 static int pcmcia_bus_uevent(struct device *dev, char **envp, int num_envp,
 895                               char *buffer, int buffer_size)
 896 {
 897         return -ENODEV;
 898 }
 899
 900 #endif
 901
 902 /************************ per-device sysfs output ***************************/
 903
 904 #define pcmcia_device_attr(field, test, format)                         \
 905 static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf)              \
 906 {                                                                       \
 907         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);               \
 908         return p_dev->test ? sprintf (buf, format, p_dev->field) : -ENODEV; \
 909 }
 910
 911 #define pcmcia_device_stringattr(name, field)                                   \
 912 static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf)               \
 913 {                                                                       \
 914         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);               \
 915         return p_dev->field ? sprintf (buf, "%s\n", p_dev->field) : -ENODEV; \
 916 }
 917
 918 pcmcia_device_attr(func, socket, "0x%02x\n");
 919 pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
 920 pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
 921 pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
 922 pcmcia_device_stringattr(prod_id1, prod_id[0]);
 923 pcmcia_device_stringattr(prod_id2, prod_id[1]);
 924 pcmcia_device_stringattr(prod_id3, prod_id[2]);
 925 pcmcia_device_stringattr(prod_id4, prod_id[3]);
 926
 927 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
 928 {
 929         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 930         int i;
 931         u32 hash[4] = { 0, 0, 0, 0};
 932
 933         /* calculate hashes */
 934         for (i=0; i<4; i++) {
 935                 if (!p_dev->prod_id[i])
 936                         continue;
 937                 hash[i] = crc32(0,p_dev->prod_id[i],strlen(p_dev->prod_id[i]));
 938         }
 939         return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
 940                                 "pa%08Xpb%08Xpc%08Xpd%08X\n",
 941                                 p_dev->has_manf_id ? p_dev->manf_id : 0,
 942                                 p_dev->has_card_id ? p_dev->card_id : 0,
 943                                 p_dev->has_func_id ? p_dev->func_id : 0,
 944                                 p_dev->func, p_dev->device_no,
 945                                 hash[0], hash[1], hash[2], hash[3]);
 946 }
 947
 948 static ssize_t pcmcia_store_allow_func_id_match(struct device *dev,
 949                 struct device_attribute *attr, const char *buf, size_t count)
 950 {
 951         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 952         if (!count)
 953                 return -EINVAL;
 954
 955         down(&p_dev->socket->skt_sem);
 956         p_dev->allow_func_id_match = 1;
 957         up(&p_dev->socket->skt_sem);
 958
 959         bus_rescan_devices(&pcmcia_bus_type);
 960
 961         return count;
 962 }
 963
 964 static struct device_attribute pcmcia_dev_attrs[] = {
 965         __ATTR(function, 0444, func_show, NULL),
 966         __ATTR_RO(func_id),
 967         __ATTR_RO(manf_id),
 968         __ATTR_RO(card_id),
 969         __ATTR_RO(prod_id1),
 970         __ATTR_RO(prod_id2),
 971         __ATTR_RO(prod_id3),
 972         __ATTR_RO(prod_id4),
 973         __ATTR_RO(modalias),
 974         __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match),
 975         __ATTR_NULL,
 976 };
 977
 978 /* PM support, also needed for reset */
 979
 980 static int pcmcia_dev_suspend(struct device * dev, pm_message_t state)
 981 {
 982         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 983         struct pcmcia_driver *p_drv = NULL;
 984
 985         if (dev->driver)
 986                 p_drv = to_pcmcia_drv(dev->driver);
 987
 988         if (p_drv && p_drv->suspend)
 989                 return p_drv->suspend(p_dev);
 990
 991         return 0;
 992 }
 993
 994
 995 static int pcmcia_dev_resume(struct device * dev)
 996 {
 997         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 998         struct pcmcia_driver *p_drv = NULL;
 999
1000         if (dev->driver)
1001                 p_drv = to_pcmcia_drv(dev->driver);
1002
1003         if (p_drv && p_drv->resume)
1004                 return p_drv->resume(p_dev);
1005
1006         return 0;
1007 }
1008
1009
1010 static int pcmcia_bus_suspend_callback(struct device *dev, void * _data)
1011 {
1012         struct pcmcia_socket *skt = _data;
1013         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1014
1015         if (p_dev->socket != skt)
1016                 return 0;
1017
1018         return dpm_runtime_suspend(dev, PMSG_SUSPEND);
1019 }
1020
1021 static int pcmcia_bus_resume_callback(struct device *dev, void * _data)
1022 {
1023         struct pcmcia_socket *skt = _data;
1024         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1025
1026         if (p_dev->socket != skt)
1027                 return 0;
1028
1029         dpm_runtime_resume(dev);
1030
1031         return 0;
1032 }
1033
1034 static int pcmcia_bus_resume(struct pcmcia_socket *skt)
1035 {
1036         bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback);
1037         return 0;
1038 }
1039
1040 static int pcmcia_bus_suspend(struct pcmcia_socket *skt)
1041 {
1042         if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt,
1043                              pcmcia_bus_suspend_callback)) {
1044                 pcmcia_bus_resume(skt);
1045                 return -EIO;
1046         }
1047         return 0;
1048 }
1049
1050
1051 /*======================================================================
1052
1053     The card status event handler.
1054
1055 ======================================================================*/
1056
1057 /* Normally, the event is passed to individual drivers after
1058  * informing userspace. Only for CS_EVENT_CARD_REMOVAL this
1059  * is inversed to maintain historic compatibility.
1060  */
1061
1062 static int ds_event(struct pcmcia_socket *skt, event_t event, int priority)
1063 {
1064         struct pcmcia_socket *s = pcmcia_get_socket(skt);
1065
1066         ds_dbg(1, "ds_event(0x%06x, %d, 0x%p)\n",
1067                event, priority, skt);
1068
1069         switch (event) {
1070         case CS_EVENT_CARD_REMOVAL:
1071                 s->pcmcia_state.present = 0;
1072                 pcmcia_card_remove(skt);
1073                 handle_event(skt, event);
1074                 break;
1075
1076         case CS_EVENT_CARD_INSERTION:
1077                 s->pcmcia_state.present = 1;
1078                 pcmcia_card_add(skt);
1079                 handle_event(skt, event);
1080                 break;
1081
1082         case CS_EVENT_EJECTION_REQUEST:
1083                 break;
1084
1085         case CS_EVENT_PM_SUSPEND:
1086         case CS_EVENT_PM_RESUME:
1087         case CS_EVENT_RESET_PHYSICAL:
1088         case CS_EVENT_CARD_RESET:
1089         default:
1090                 handle_event(skt, event);
1091                 break;
1092     }
1093
1094     pcmcia_put_socket(s);
1095
1096     return 0;
1097 } /* ds_event */
1098
1099
1100 static struct pcmcia_callback pcmcia_bus_callback = {
1101         .owner = THIS_MODULE,
1102         .event = ds_event,
1103         .requery = pcmcia_bus_rescan,
1104         .suspend = pcmcia_bus_suspend,
1105         .resume = pcmcia_bus_resume,
1106 };
1107
1108 static int __devinit pcmcia_bus_add_socket(struct class_device *class_dev,
1109                                            struct class_interface *class_intf)
1110 {
1111         struct pcmcia_socket *socket = class_get_devdata(class_dev);
1112         int ret;
1113
1114         socket = pcmcia_get_socket(socket);
1115         if (!socket) {
1116                 printk(KERN_ERR "PCMCIA obtaining reference to socket %p failed\n", socket);
1117                 return -ENODEV;
1118         }
1119
1120         /*
1121          * Ugly. But we want to wait for the socket threads to have started up.
1122          * We really should let the drivers themselves drive some of this..
1123          */
1124         msleep(250);
1125
1126 #ifdef CONFIG_PCMCIA_IOCTL
1127         init_waitqueue_head(&socket->queue);
1128 #endif
1129         INIT_LIST_HEAD(&socket->devices_list);
1130         INIT_WORK(&socket->device_add, pcmcia_delayed_add_pseudo_device, socket);
1131         memset(&socket->pcmcia_state, 0, sizeof(u8));
1132         socket->device_count = 0;
1133
1134         ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback);
1135         if (ret) {
1136                 printk(KERN_ERR "PCMCIA registration PCCard core failed for socket %p\n", socket);
1137                 pcmcia_put_socket(socket);
1138                 return (ret);
1139         }
1140
1141         return 0;
1142 }
1143
1144 static void pcmcia_bus_remove_socket(struct class_device *class_dev,
1145                                      struct class_interface *class_intf)
1146 {
1147         struct pcmcia_socket *socket = class_get_devdata(class_dev);
1148
1149         if (!socket)
1150                 return;
1151
1152         socket->pcmcia_state.dead = 1;
1153         pccard_register_pcmcia(socket, NULL);
1154
1155         pcmcia_put_socket(socket);
1156
1157         return;
1158 }
1159
1160
1161 /* the pcmcia_bus_interface is used to handle pcmcia socket devices */
1162 static struct class_interface pcmcia_bus_interface = {
1163         .class = &pcmcia_socket_class,
1164         .add = &pcmcia_bus_add_socket,
1165         .remove = &pcmcia_bus_remove_socket,
1166 };
1167
1168
1169 struct bus_type pcmcia_bus_type = {
1170         .name = "pcmcia",
1171         .uevent = pcmcia_bus_uevent,
1172         .match = pcmcia_bus_match,
1173         .dev_attrs = pcmcia_dev_attrs,
1174         .suspend = pcmcia_dev_suspend,
1175         .resume = pcmcia_dev_resume,
1176 };
1177
1178
1179 static int __init init_pcmcia_bus(void)
1180 {
1181         spin_lock_init(&pcmcia_dev_list_lock);
1182
1183         bus_register(&pcmcia_bus_type);
1184         class_interface_register(&pcmcia_bus_interface);
1185
1186         pcmcia_setup_ioctl();
1187
1188         return 0;
1189 }
1190 fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that
1191                                * pcmcia_socket_class is already registered */
1192
1193
1194 static void __exit exit_pcmcia_bus(void)
1195 {
1196         pcmcia_cleanup_ioctl();
1197
1198         class_interface_unregister(&pcmcia_bus_interface);
1199
1200         bus_unregister(&pcmcia_bus_type);
1201 }
1202 module_exit(exit_pcmcia_bus);
1203
1204
1205 MODULE_ALIAS("ds");