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 static void pcmcia_add_pseudo_device(struct pcmcia_socket *s)
 356 {
 357         if (!s->pcmcia_state.device_add_pending) {
 358                 s->pcmcia_state.device_add_pending = 1;
 359                 schedule_work(&s->device_add);
 360         }
 361         return;
 362 }
 363
 364 static int pcmcia_device_probe(struct device * dev)
 365 {
 366         struct pcmcia_device *p_dev;
 367         struct pcmcia_driver *p_drv;
 368         struct pcmcia_device_id *did;
 369         struct pcmcia_socket *s;
 370         int ret = 0;
 371
 372         dev = get_device(dev);
 373         if (!dev)
 374                 return -ENODEV;
 375
 376         p_dev = to_pcmcia_dev(dev);
 377         p_drv = to_pcmcia_drv(dev->driver);
 378         s = p_dev->socket;
 379
 380         if ((!p_drv->probe) || (!try_module_get(p_drv->owner))) {
 381                 ret = -EINVAL;
 382                 goto put_dev;
 383         }
 384
 385         p_dev->state &= ~CLIENT_UNBOUND;
 386
 387         /* set up the device configuration, if it hasn't been done before */
 388         if (!s->functions) {
 389                 cistpl_longlink_mfc_t mfc;
 390                 if (pccard_read_tuple(s, p_dev->func, CISTPL_LONGLINK_MFC,
 391                                       &mfc) == CS_SUCCESS)
 392                         s->functions = mfc.nfn;
 393                 else
 394                         s->functions = 1;
 395                 s->config = kzalloc(sizeof(config_t) * s->functions,
 396                                     GFP_KERNEL);
 397                 if (!s->config) {
 398                         ret = -ENOMEM;
 399                         goto put_module;
 400                 }
 401         }
 402
 403         ret = p_drv->probe(p_dev);
 404         if (ret)
 405                 goto put_module;
 406
 407         /* handle pseudo multifunction devices:
 408          * there are at most two pseudo multifunction devices.
 409          * if we're matching against the first, schedule a
 410          * call which will then check whether there are two
 411          * pseudo devices, and if not, add the second one.
 412          */
 413         did = (struct pcmcia_device_id *) p_dev->dev.driver_data;
 414         if (did && (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) &&
 415             (p_dev->socket->device_count == 1) && (p_dev->device_no == 0))
 416                 pcmcia_add_pseudo_device(p_dev->socket);
 417
 418  put_module:
 419         if (ret)
 420                 module_put(p_drv->owner);
 421  put_dev:
 422         if (ret)
 423                 put_device(dev);
 424         return (ret);
 425 }
 426
 427
 428 static int pcmcia_device_remove(struct device * dev)
 429 {
 430         struct pcmcia_device *p_dev;
 431         struct pcmcia_driver *p_drv;
 432         int i;
 433
 434         /* detach the "instance" */
 435         p_dev = to_pcmcia_dev(dev);
 436         p_drv = to_pcmcia_drv(dev->driver);
 437         if (!p_drv)
 438                 return 0;
 439
 440         if (p_drv->remove)
 441                 p_drv->remove(p_dev);
 442
 443         /* check for proper unloading */
 444         if (p_dev->state & (CLIENT_IRQ_REQ|CLIENT_IO_REQ|CLIENT_CONFIG_LOCKED))
 445                 printk(KERN_INFO "pcmcia: driver %s did not release config properly\n",
 446                        p_drv->drv.name);
 447
 448         for (i = 0; i < MAX_WIN; i++)
 449                 if (p_dev->state & CLIENT_WIN_REQ(i))
 450                         printk(KERN_INFO "pcmcia: driver %s did not release windows properly\n",
 451                                p_drv->drv.name);
 452
 453         /* references from pcmcia_probe_device */
 454         p_dev->state = CLIENT_UNBOUND;
 455         pcmcia_put_dev(p_dev);
 456         module_put(p_drv->owner);
 457
 458         return 0;
 459 }
 460
 461
 462 /*
 463  * Removes a PCMCIA card from the device tree and socket list.
 464  */
 465 static void pcmcia_card_remove(struct pcmcia_socket *s)
 466 {
 467         struct pcmcia_device    *p_dev;
 468         unsigned long           flags;
 469
 470         ds_dbg(2, "unbind_request(%d)\n", s->sock);
 471
 472         s->device_count = 0;
 473
 474         for (;;) {
 475                 /* unregister all pcmcia_devices registered with this socket*/
 476                 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 477                 if (list_empty(&s->devices_list)) {
 478                         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 479                         return;
 480                 }
 481                 p_dev = list_entry((&s->devices_list)->next, struct pcmcia_device, socket_device_list);
 482                 list_del(&p_dev->socket_device_list);
 483                 p_dev->state |= CLIENT_STALE;
 484                 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 485
 486                 device_unregister(&p_dev->dev);
 487         }
 488
 489         return;
 490 } /* unbind_request */
 491
 492
 493 /*
 494  * pcmcia_device_query -- determine information about a pcmcia device
 495  */
 496 static int pcmcia_device_query(struct pcmcia_device *p_dev)
 497 {
 498         cistpl_manfid_t manf_id;
 499         cistpl_funcid_t func_id;
 500         cistpl_vers_1_t *vers1;
 501         unsigned int i;
 502
 503         vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL);
 504         if (!vers1)
 505                 return -ENOMEM;
 506
 507         if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 508                                CISTPL_MANFID, &manf_id)) {
 509                 p_dev->manf_id = manf_id.manf;
 510                 p_dev->card_id = manf_id.card;
 511                 p_dev->has_manf_id = 1;
 512                 p_dev->has_card_id = 1;
 513         }
 514
 515         if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 516                                CISTPL_FUNCID, &func_id)) {
 517                 p_dev->func_id = func_id.func;
 518                 p_dev->has_func_id = 1;
 519         } else {
 520                 /* rule of thumb: cards with no FUNCID, but with
 521                  * common memory device geometry information, are
 522                  * probably memory cards (from pcmcia-cs) */
 523                 cistpl_device_geo_t *devgeo;
 524
 525                 devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL);
 526                 if (!devgeo) {
 527                         kfree(vers1);
 528                         return -ENOMEM;
 529                 }
 530                 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 531                                       CISTPL_DEVICE_GEO, devgeo)) {
 532                         ds_dbg(0, "mem device geometry probably means "
 533                                "FUNCID_MEMORY\n");
 534                         p_dev->func_id = CISTPL_FUNCID_MEMORY;
 535                         p_dev->has_func_id = 1;
 536                 }
 537                 kfree(devgeo);
 538         }
 539
 540         if (!pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_VERS_1,
 541                                vers1)) {
 542                 for (i=0; i < vers1->ns; i++) {
 543                         char *tmp;
 544                         unsigned int length;
 545
 546                         tmp = vers1->str + vers1->ofs[i];
 547
 548                         length = strlen(tmp) + 1;
 549                         if ((length < 3) || (length > 255))
 550                                 continue;
 551
 552                         p_dev->prod_id[i] = kmalloc(sizeof(char) * length,
 553                                                     GFP_KERNEL);
 554                         if (!p_dev->prod_id[i])
 555                                 continue;
 556
 557                         p_dev->prod_id[i] = strncpy(p_dev->prod_id[i],
 558                                                     tmp, length);
 559                 }
 560         }
 561
 562         kfree(vers1);
 563         return 0;
 564 }
 565
 566
 567 /* device_add_lock is needed to avoid double registration by cardmgr and kernel.
 568  * Serializes pcmcia_device_add; will most likely be removed in future.
 569  *
 570  * While it has the caveat that adding new PCMCIA devices inside(!) device_register()
 571  * won't work, this doesn't matter much at the moment: the driver core doesn't
 572  * support it either.
 573  */
 574 static DECLARE_MUTEX(device_add_lock);
 575
 576 struct pcmcia_device * pcmcia_device_add(struct pcmcia_socket *s, unsigned int function)
 577 {
 578         struct pcmcia_device *p_dev;
 579         unsigned long flags;
 580         int bus_id_len;
 581
 582         s = pcmcia_get_socket(s);
 583         if (!s)
 584                 return NULL;
 585
 586         down(&device_add_lock);
 587
 588         /* max of 2 devices per card */
 589         if (s->device_count == 2)
 590                 goto err_put;
 591
 592         p_dev = kzalloc(sizeof(struct pcmcia_device), GFP_KERNEL);
 593         if (!p_dev)
 594                 goto err_put;
 595
 596         p_dev->socket = s;
 597         p_dev->device_no = (s->device_count++);
 598         p_dev->func   = function;
 599
 600         p_dev->dev.bus = &pcmcia_bus_type;
 601         p_dev->dev.parent = s->dev.dev;
 602         p_dev->dev.release = pcmcia_release_dev;
 603         bus_id_len = sprintf (p_dev->dev.bus_id, "%d.%d", p_dev->socket->sock, p_dev->device_no);
 604
 605         p_dev->devname = kmalloc(6 + bus_id_len + 1, GFP_KERNEL);
 606         if (!p_dev->devname)
 607                 goto err_free;
 608         sprintf (p_dev->devname, "pcmcia%s", p_dev->dev.bus_id);
 609
 610         /* compat */
 611         p_dev->state = CLIENT_UNBOUND;
 612
 613         /* Add to the list in pcmcia_bus_socket */
 614         spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 615         list_add_tail(&p_dev->socket_device_list, &s->devices_list);
 616         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 617
 618         printk(KERN_NOTICE "pcmcia: registering new device %s\n",
 619                p_dev->devname);
 620
 621         pcmcia_device_query(p_dev);
 622
 623         if (device_register(&p_dev->dev)) {
 624                 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 625                 list_del(&p_dev->socket_device_list);
 626                 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 627
 628                 goto err_free;
 629        }
 630
 631         up(&device_add_lock);
 632
 633         return p_dev;
 634
 635  err_free:
 636         kfree(p_dev->devname);
 637         kfree(p_dev);
 638         s->device_count--;
 639  err_put:
 640         up(&device_add_lock);
 641         pcmcia_put_socket(s);
 642
 643         return NULL;
 644 }
 645
 646
 647 static int pcmcia_card_add(struct pcmcia_socket *s)
 648 {
 649         cisinfo_t cisinfo;
 650         cistpl_longlink_mfc_t mfc;
 651         unsigned int no_funcs, i;
 652         int ret = 0;
 653
 654         if (!(s->resource_setup_done))
 655                 return -EAGAIN; /* try again, but later... */
 656
 657         if (pcmcia_validate_mem(s))
 658                 return -EAGAIN; /* try again, but later... */
 659
 660         ret = pccard_validate_cis(s, BIND_FN_ALL, &cisinfo);
 661         if (ret || !cisinfo.Chains) {
 662                 ds_dbg(0, "invalid CIS or invalid resources\n");
 663                 return -ENODEV;
 664         }
 665
 666         if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
 667                 no_funcs = mfc.nfn;
 668         else
 669                 no_funcs = 1;
 670
 671         for (i=0; i < no_funcs; i++)
 672                 pcmcia_device_add(s, i);
 673
 674         return (ret);
 675 }
 676
 677
 678 static void pcmcia_delayed_add_pseudo_device(void *data)
 679 {
 680         struct pcmcia_socket *s = data;
 681         pcmcia_device_add(s, 0);
 682         s->pcmcia_state.device_add_pending = 0;
 683 }
 684
 685 static int pcmcia_requery(struct device *dev, void * _data)
 686 {
 687         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 688         if (!p_dev->dev.driver)
 689                 pcmcia_device_query(p_dev);
 690
 691         return 0;
 692 }
 693
 694 static void pcmcia_bus_rescan(struct pcmcia_socket *skt)
 695 {
 696         int no_devices=0;
 697         unsigned long flags;
 698
 699         /* must be called with skt_sem held */
 700         spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 701         if (list_empty(&skt->devices_list))
 702                 no_devices=1;
 703         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 704
 705         /* if no devices were added for this socket yet because of
 706          * missing resource information or other trouble, we need to
 707          * do this now. */
 708         if (no_devices) {
 709                 int ret = pcmcia_card_add(skt);
 710                 if (ret)
 711                         return;
 712         }
 713
 714         /* some device information might have changed because of a CIS
 715          * update or because we can finally read it correctly... so
 716          * determine it again, overwriting old values if necessary. */
 717         bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery);
 718
 719         /* we re-scan all devices, not just the ones connected to this
 720          * socket. This does not matter, though. */
 721         bus_rescan_devices(&pcmcia_bus_type);
 722 }
 723
 724 static inline int pcmcia_devmatch(struct pcmcia_device *dev,
 725                                   struct pcmcia_device_id *did)
 726 {
 727         if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
 728                 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
 729                         return 0;
 730         }
 731
 732         if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
 733                 if ((!dev->has_card_id) || (dev->card_id != did->card_id))
 734                         return 0;
 735         }
 736
 737         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
 738                 if (dev->func != did->function)
 739                         return 0;
 740         }
 741
 742         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
 743                 if (!dev->prod_id[0])
 744                         return 0;
 745                 if (strcmp(did->prod_id[0], dev->prod_id[0]))
 746                         return 0;
 747         }
 748
 749         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
 750                 if (!dev->prod_id[1])
 751                         return 0;
 752                 if (strcmp(did->prod_id[1], dev->prod_id[1]))
 753                         return 0;
 754         }
 755
 756         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
 757                 if (!dev->prod_id[2])
 758                         return 0;
 759                 if (strcmp(did->prod_id[2], dev->prod_id[2]))
 760                         return 0;
 761         }
 762
 763         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
 764                 if (!dev->prod_id[3])
 765                         return 0;
 766                 if (strcmp(did->prod_id[3], dev->prod_id[3]))
 767                         return 0;
 768         }
 769
 770         if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
 771                 if (dev->device_no != did->device_no)
 772                         return 0;
 773         }
 774
 775         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
 776                 if ((!dev->has_func_id) || (dev->func_id != did->func_id))
 777                         return 0;
 778
 779                 /* if this is a pseudo-multi-function device,
 780                  * we need explicit matches */
 781                 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO)
 782                         return 0;
 783                 if (dev->device_no)
 784                         return 0;
 785
 786                 /* also, FUNC_ID matching needs to be activated by userspace
 787                  * after it has re-checked that there is no possible module
 788                  * with a prod_id/manf_id/card_id match.
 789                  */
 790                 if (!dev->allow_func_id_match)
 791                         return 0;
 792         }
 793
 794         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
 795                 if (!dev->socket->fake_cis)
 796                         pcmcia_load_firmware(dev, did->cisfile);
 797
 798                 if (!dev->socket->fake_cis)
 799                         return 0;
 800         }
 801
 802         if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
 803                 int i;
 804                 for (i=0; i<4; i++)
 805                         if (dev->prod_id[i])
 806                                 return 0;
 807                 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
 808                         return 0;
 809         }
 810
 811         dev->dev.driver_data = (void *) did;
 812
 813         return 1;
 814 }
 815
 816
 817 static int pcmcia_bus_match(struct device * dev, struct device_driver * drv) {
 818         struct pcmcia_device * p_dev = to_pcmcia_dev(dev);
 819         struct pcmcia_driver * p_drv = to_pcmcia_drv(drv);
 820         struct pcmcia_device_id *did = p_drv->id_table;
 821
 822         /* matching by cardmgr */
 823         if (p_dev->cardmgr == p_drv)
 824                 return 1;
 825
 826         while (did && did->match_flags) {
 827                 if (pcmcia_devmatch(p_dev, did))
 828                         return 1;
 829                 did++;
 830         }
 831
 832         return 0;
 833 }
 834
 835 #ifdef CONFIG_HOTPLUG
 836
 837 static int pcmcia_bus_uevent(struct device *dev, char **envp, int num_envp,
 838                              char *buffer, int buffer_size)
 839 {
 840         struct pcmcia_device *p_dev;
 841         int i, length = 0;
 842         u32 hash[4] = { 0, 0, 0, 0};
 843
 844         if (!dev)
 845                 return -ENODEV;
 846
 847         p_dev = to_pcmcia_dev(dev);
 848
 849         /* calculate hashes */
 850         for (i=0; i<4; i++) {
 851                 if (!p_dev->prod_id[i])
 852                         continue;
 853                 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
 854         }
 855
 856         i = 0;
 857
 858         if (add_uevent_var(envp, num_envp, &i,
 859                            buffer, buffer_size, &length,
 860                            "SOCKET_NO=%u",
 861                            p_dev->socket->sock))
 862                 return -ENOMEM;
 863
 864         if (add_uevent_var(envp, num_envp, &i,
 865                            buffer, buffer_size, &length,
 866                            "DEVICE_NO=%02X",
 867                            p_dev->device_no))
 868                 return -ENOMEM;
 869
 870         if (add_uevent_var(envp, num_envp, &i,
 871                            buffer, buffer_size, &length,
 872                            "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
 873                            "pa%08Xpb%08Xpc%08Xpd%08X",
 874                            p_dev->has_manf_id ? p_dev->manf_id : 0,
 875                            p_dev->has_card_id ? p_dev->card_id : 0,
 876                            p_dev->has_func_id ? p_dev->func_id : 0,
 877                            p_dev->func,
 878                            p_dev->device_no,
 879                            hash[0],
 880                            hash[1],
 881                            hash[2],
 882                            hash[3]))
 883                 return -ENOMEM;
 884
 885         envp[i] = NULL;
 886
 887         return 0;
 888 }
 889
 890 #else
 891
 892 static int pcmcia_bus_uevent(struct device *dev, char **envp, int num_envp,
 893                               char *buffer, int buffer_size)
 894 {
 895         return -ENODEV;
 896 }
 897
 898 #endif
 899
 900 /************************ per-device sysfs output ***************************/
 901
 902 #define pcmcia_device_attr(field, test, format)                         \
 903 static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf)              \
 904 {                                                                       \
 905         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);               \
 906         return p_dev->test ? sprintf (buf, format, p_dev->field) : -ENODEV; \
 907 }
 908
 909 #define pcmcia_device_stringattr(name, field)                                   \
 910 static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf)               \
 911 {                                                                       \
 912         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);               \
 913         return p_dev->field ? sprintf (buf, "%s\n", p_dev->field) : -ENODEV; \
 914 }
 915
 916 pcmcia_device_attr(func, socket, "0x%02x\n");
 917 pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
 918 pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
 919 pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
 920 pcmcia_device_stringattr(prod_id1, prod_id[0]);
 921 pcmcia_device_stringattr(prod_id2, prod_id[1]);
 922 pcmcia_device_stringattr(prod_id3, prod_id[2]);
 923 pcmcia_device_stringattr(prod_id4, prod_id[3]);
 924
 925
 926 static ssize_t pcmcia_show_pm_state(struct device *dev, struct device_attribute *attr, char *buf)
 927 {
 928         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 929
 930         if (p_dev->dev.power.power_state.event != PM_EVENT_ON)
 931                 return sprintf(buf, "off\n");
 932         else
 933                 return sprintf(buf, "on\n");
 934 }
 935
 936 static ssize_t pcmcia_store_pm_state(struct device *dev, struct device_attribute *attr,
 937                                      const char *buf, size_t count)
 938 {
 939         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 940         int ret = 0;
 941
 942         if (!count)
 943                 return -EINVAL;
 944
 945         if ((p_dev->dev.power.power_state.event == PM_EVENT_ON) &&
 946             (!strncmp(buf, "off", 3)))
 947                 ret = dpm_runtime_suspend(dev, PMSG_SUSPEND);
 948         else if ((p_dev->dev.power.power_state.event != PM_EVENT_ON) &&
 949                  (!strncmp(buf, "on", 2)))
 950                 dpm_runtime_resume(dev);
 951
 952         return ret ? ret : count;
 953 }
 954
 955
 956 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
 957 {
 958         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 959         int i;
 960         u32 hash[4] = { 0, 0, 0, 0};
 961
 962         /* calculate hashes */
 963         for (i=0; i<4; i++) {
 964                 if (!p_dev->prod_id[i])
 965                         continue;
 966                 hash[i] = crc32(0,p_dev->prod_id[i],strlen(p_dev->prod_id[i]));
 967         }
 968         return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
 969                                 "pa%08Xpb%08Xpc%08Xpd%08X\n",
 970                                 p_dev->has_manf_id ? p_dev->manf_id : 0,
 971                                 p_dev->has_card_id ? p_dev->card_id : 0,
 972                                 p_dev->has_func_id ? p_dev->func_id : 0,
 973                                 p_dev->func, p_dev->device_no,
 974                                 hash[0], hash[1], hash[2], hash[3]);
 975 }
 976
 977 static ssize_t pcmcia_store_allow_func_id_match(struct device *dev,
 978                 struct device_attribute *attr, const char *buf, size_t count)
 979 {
 980         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 981
 982         if (!count)
 983                 return -EINVAL;
 984
 985         down(&p_dev->socket->skt_sem);
 986         p_dev->allow_func_id_match = 1;
 987         up(&p_dev->socket->skt_sem);
 988
 989         bus_rescan_devices(&pcmcia_bus_type);
 990
 991         return count;
 992 }
 993
 994 static struct device_attribute pcmcia_dev_attrs[] = {
 995         __ATTR(function, 0444, func_show, NULL),
 996         __ATTR(pm_state, 0644, pcmcia_show_pm_state, pcmcia_store_pm_state),
 997         __ATTR_RO(func_id),
 998         __ATTR_RO(manf_id),
 999         __ATTR_RO(card_id),
1000         __ATTR_RO(prod_id1),
1001         __ATTR_RO(prod_id2),
1002         __ATTR_RO(prod_id3),
1003         __ATTR_RO(prod_id4),
1004         __ATTR_RO(modalias),
1005         __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match),
1006         __ATTR_NULL,
1007 };
1008
1009 /* PM support, also needed for reset */
1010
1011 static int pcmcia_dev_suspend(struct device * dev, pm_message_t state)
1012 {
1013         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1014         struct pcmcia_driver *p_drv = NULL;
1015
1016         if (dev->driver)
1017                 p_drv = to_pcmcia_drv(dev->driver);
1018
1019         if (p_drv && p_drv->suspend)
1020                 return p_drv->suspend(p_dev);
1021
1022         return 0;
1023 }
1024
1025
1026 static int pcmcia_dev_resume(struct device * dev)
1027 {
1028         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1029         struct pcmcia_driver *p_drv = NULL;
1030
1031         if (dev->driver)
1032                 p_drv = to_pcmcia_drv(dev->driver);
1033
1034         if (p_drv && p_drv->resume)
1035                 return p_drv->resume(p_dev);
1036
1037         return 0;
1038 }
1039
1040
1041 static int pcmcia_bus_suspend_callback(struct device *dev, void * _data)
1042 {
1043         struct pcmcia_socket *skt = _data;
1044         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1045
1046         if (p_dev->socket != skt)
1047                 return 0;
1048
1049         return dpm_runtime_suspend(dev, PMSG_SUSPEND);
1050 }
1051
1052 static int pcmcia_bus_resume_callback(struct device *dev, void * _data)
1053 {
1054         struct pcmcia_socket *skt = _data;
1055         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1056
1057         if (p_dev->socket != skt)
1058                 return 0;
1059
1060         dpm_runtime_resume(dev);
1061
1062         return 0;
1063 }
1064
1065 static int pcmcia_bus_resume(struct pcmcia_socket *skt)
1066 {
1067         bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback);
1068         return 0;
1069 }
1070
1071 static int pcmcia_bus_suspend(struct pcmcia_socket *skt)
1072 {
1073         if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt,
1074                              pcmcia_bus_suspend_callback)) {
1075                 pcmcia_bus_resume(skt);
1076                 return -EIO;
1077         }
1078         return 0;
1079 }
1080
1081
1082 /*======================================================================
1083
1084     The card status event handler.
1085
1086 ======================================================================*/
1087
1088 /* Normally, the event is passed to individual drivers after
1089  * informing userspace. Only for CS_EVENT_CARD_REMOVAL this
1090  * is inversed to maintain historic compatibility.
1091  */
1092
1093 static int ds_event(struct pcmcia_socket *skt, event_t event, int priority)
1094 {
1095         struct pcmcia_socket *s = pcmcia_get_socket(skt);
1096
1097         ds_dbg(1, "ds_event(0x%06x, %d, 0x%p)\n",
1098                event, priority, skt);
1099
1100         switch (event) {
1101         case CS_EVENT_CARD_REMOVAL:
1102                 s->pcmcia_state.present = 0;
1103                 pcmcia_card_remove(skt);
1104                 handle_event(skt, event);
1105                 break;
1106
1107         case CS_EVENT_CARD_INSERTION:
1108                 s->pcmcia_state.present = 1;
1109                 pcmcia_card_add(skt);
1110                 handle_event(skt, event);
1111                 break;
1112
1113         case CS_EVENT_EJECTION_REQUEST:
1114                 break;
1115
1116         case CS_EVENT_PM_SUSPEND:
1117         case CS_EVENT_PM_RESUME:
1118         case CS_EVENT_RESET_PHYSICAL:
1119         case CS_EVENT_CARD_RESET:
1120         default:
1121                 handle_event(skt, event);
1122                 break;
1123     }
1124
1125     pcmcia_put_socket(s);
1126
1127     return 0;
1128 } /* ds_event */
1129
1130
1131 static struct pcmcia_callback pcmcia_bus_callback = {
1132         .owner = THIS_MODULE,
1133         .event = ds_event,
1134         .requery = pcmcia_bus_rescan,
1135         .suspend = pcmcia_bus_suspend,
1136         .resume = pcmcia_bus_resume,
1137 };
1138
1139 static int __devinit pcmcia_bus_add_socket(struct class_device *class_dev,
1140                                            struct class_interface *class_intf)
1141 {
1142         struct pcmcia_socket *socket = class_get_devdata(class_dev);
1143         int ret;
1144
1145         socket = pcmcia_get_socket(socket);
1146         if (!socket) {
1147                 printk(KERN_ERR "PCMCIA obtaining reference to socket %p failed\n", socket);
1148                 return -ENODEV;
1149         }
1150
1151         /*
1152          * Ugly. But we want to wait for the socket threads to have started up.
1153          * We really should let the drivers themselves drive some of this..
1154          */
1155         msleep(250);
1156
1157 #ifdef CONFIG_PCMCIA_IOCTL
1158         init_waitqueue_head(&socket->queue);
1159 #endif
1160         INIT_LIST_HEAD(&socket->devices_list);
1161         INIT_WORK(&socket->device_add, pcmcia_delayed_add_pseudo_device, socket);
1162         memset(&socket->pcmcia_state, 0, sizeof(u8));
1163         socket->device_count = 0;
1164
1165         ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback);
1166         if (ret) {
1167                 printk(KERN_ERR "PCMCIA registration PCCard core failed for socket %p\n", socket);
1168                 pcmcia_put_socket(socket);
1169                 return (ret);
1170         }
1171
1172         return 0;
1173 }
1174
1175 static void pcmcia_bus_remove_socket(struct class_device *class_dev,
1176                                      struct class_interface *class_intf)
1177 {
1178         struct pcmcia_socket *socket = class_get_devdata(class_dev);
1179
1180         if (!socket)
1181                 return;
1182
1183         socket->pcmcia_state.dead = 1;
1184         pccard_register_pcmcia(socket, NULL);
1185
1186         pcmcia_put_socket(socket);
1187
1188         return;
1189 }
1190
1191
1192 /* the pcmcia_bus_interface is used to handle pcmcia socket devices */
1193 static struct class_interface pcmcia_bus_interface = {
1194         .class = &pcmcia_socket_class,
1195         .add = &pcmcia_bus_add_socket,
1196         .remove = &pcmcia_bus_remove_socket,
1197 };
1198
1199
1200 struct bus_type pcmcia_bus_type = {
1201         .name = "pcmcia",
1202         .uevent = pcmcia_bus_uevent,
1203         .match = pcmcia_bus_match,
1204         .dev_attrs = pcmcia_dev_attrs,
1205         .probe = pcmcia_device_probe,
1206         .remove = pcmcia_device_remove,
1207         .suspend = pcmcia_dev_suspend,
1208         .resume = pcmcia_dev_resume,
1209 };
1210
1211
1212 static int __init init_pcmcia_bus(void)
1213 {
1214         spin_lock_init(&pcmcia_dev_list_lock);
1215
1216         bus_register(&pcmcia_bus_type);
1217         class_interface_register(&pcmcia_bus_interface);
1218
1219         pcmcia_setup_ioctl();
1220
1221         return 0;
1222 }
1223 fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that
1224                                * pcmcia_socket_class is already registered */
1225
1226
1227 static void __exit exit_pcmcia_bus(void)
1228 {
1229         pcmcia_cleanup_ioctl();
1230
1231         class_interface_unregister(&pcmcia_bus_interface);
1232
1233         bus_unregister(&pcmcia_bus_type);
1234 }
1235 module_exit(exit_pcmcia_bus);
1236
1237
1238 MODULE_ALIAS("ds");