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

   1 /*
   2  * ds.c -- 16-bit PCMCIA core support
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2 as
   6  * published by the Free Software Foundation.
   7  *
   8  * The initial developer of the original code is David A. Hinds
   9  * <dahinds@users.sourceforge.net>.  Portions created by David A. Hinds
  10  * are Copyright (C) 1999 David A. Hinds.  All Rights Reserved.
  11  *
  12  * (C) 1999             David A. Hinds
  13  * (C) 2003 - 2006      Dominik Brodowski
  14  */
  15
  16 #include <linux/kernel.h>
  17 #include <linux/module.h>
  18 #include <linux/init.h>
  19 #include <linux/errno.h>
  20 #include <linux/list.h>
  21 #include <linux/delay.h>
  22 #include <linux/workqueue.h>
  23 #include <linux/crc32.h>
  24 #include <linux/firmware.h>
  25 #include <linux/kref.h>
  26 #include <linux/dma-mapping.h>
  27
  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 CONFIG_PCMCIA_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 #define ds_dev_dbg(lvl, dev, fmt, arg...) do {                          \
  55         if (ds_pc_debug > (lvl))                                        \
  56                 dev_printk(KERN_DEBUG, dev, "ds: " fmt , ## arg);       \
  57 } while (0)
  58 #else
  59 #define ds_dbg(lvl, fmt, arg...) do { } while (0)
  60 #define ds_dev_dbg(lvl, dev, fmt, arg...) do { } while (0)
  61 #endif
  62
  63 spinlock_t pcmcia_dev_list_lock;
  64
  65 /*====================================================================*/
  66
  67 /* code which was in cs.c before */
  68
  69 /* String tables for error messages */
  70
  71 typedef struct lookup_t {
  72     int key;
  73     char *msg;
  74 } lookup_t;
  75
  76 static const lookup_t error_table[] = {
  77     { CS_SUCCESS,               "Operation succeeded" },
  78     { CS_BAD_ATTRIBUTE,         "Bad attribute", },
  79     { CS_BAD_BASE,              "Bad base address" },
  80     { CS_BAD_IRQ,               "Bad IRQ" },
  81     { CS_BAD_OFFSET,            "Bad offset" },
  82     { CS_BAD_PAGE,              "Bad page number" },
  83     { CS_BAD_SIZE,              "Bad size" },
  84     { CS_BAD_TYPE,              "Bad type" },
  85     { -EIO,                     "Input/Output error" },
  86     { -ENODEV,                  "No card present" },
  87     { -EINVAL,                  "Bad parameter" },
  88     { CS_BAD_ARGS,              "Bad arguments" },
  89     { CS_CONFIGURATION_LOCKED,  "Configuration locked" },
  90     { CS_IN_USE,                "Resource in use" },
  91     { CS_NO_MORE_ITEMS,         "No more items" },
  92     { CS_OUT_OF_RESOURCE,       "Out of resource" },
  93     { CS_BAD_HANDLE,            "Bad handle" },
  94     { CS_BAD_TUPLE,             "Bad CIS tuple" }
  95 };
  96
  97
  98 static const lookup_t service_table[] = {
  99     { AccessConfigurationRegister,      "AccessConfigurationRegister" },
 100     { AddSocketServices,                "AddSocketServices" },
 101     { AdjustResourceInfo,               "AdjustResourceInfo" },
 102     { CheckEraseQueue,                  "CheckEraseQueue" },
 103     { CloseMemory,                      "CloseMemory" },
 104     { DeregisterClient,                 "DeregisterClient" },
 105     { DeregisterEraseQueue,             "DeregisterEraseQueue" },
 106     { GetCardServicesInfo,              "GetCardServicesInfo" },
 107     { GetClientInfo,                    "GetClientInfo" },
 108     { GetConfigurationInfo,             "GetConfigurationInfo" },
 109     { GetEventMask,                     "GetEventMask" },
 110     { GetFirstClient,                   "GetFirstClient" },
 111     { GetFirstRegion,                   "GetFirstRegion" },
 112     { GetFirstTuple,                    "GetFirstTuple" },
 113     { GetNextClient,                    "GetNextClient" },
 114     { GetNextRegion,                    "GetNextRegion" },
 115     { GetNextTuple,                     "GetNextTuple" },
 116     { GetStatus,                        "GetStatus" },
 117     { GetTupleData,                     "GetTupleData" },
 118     { MapMemPage,                       "MapMemPage" },
 119     { ModifyConfiguration,              "ModifyConfiguration" },
 120     { ModifyWindow,                     "ModifyWindow" },
 121     { OpenMemory,                       "OpenMemory" },
 122     { ParseTuple,                       "ParseTuple" },
 123     { ReadMemory,                       "ReadMemory" },
 124     { RegisterClient,                   "RegisterClient" },
 125     { RegisterEraseQueue,               "RegisterEraseQueue" },
 126     { RegisterMTD,                      "RegisterMTD" },
 127     { ReleaseConfiguration,             "ReleaseConfiguration" },
 128     { ReleaseIO,                        "ReleaseIO" },
 129     { ReleaseIRQ,                       "ReleaseIRQ" },
 130     { ReleaseWindow,                    "ReleaseWindow" },
 131     { RequestConfiguration,             "RequestConfiguration" },
 132     { RequestIO,                        "RequestIO" },
 133     { RequestIRQ,                       "RequestIRQ" },
 134     { RequestSocketMask,                "RequestSocketMask" },
 135     { RequestWindow,                    "RequestWindow" },
 136     { ResetCard,                        "ResetCard" },
 137     { SetEventMask,                     "SetEventMask" },
 138     { ValidateCIS,                      "ValidateCIS" },
 139     { WriteMemory,                      "WriteMemory" },
 140     { BindDevice,                       "BindDevice" },
 141     { BindMTD,                          "BindMTD" },
 142     { ReportError,                      "ReportError" },
 143     { SuspendCard,                      "SuspendCard" },
 144     { ResumeCard,                       "ResumeCard" },
 145     { EjectCard,                        "EjectCard" },
 146     { InsertCard,                       "InsertCard" },
 147     { ReplaceCIS,                       "ReplaceCIS" }
 148 };
 149
 150
 151 static int pcmcia_report_error(struct pcmcia_device *p_dev, error_info_t *err)
 152 {
 153         int i;
 154         char *serv;
 155
 156         if (!p_dev)
 157                 printk(KERN_NOTICE);
 158         else
 159                 printk(KERN_NOTICE "%s: ", p_dev->dev.bus_id);
 160
 161         for (i = 0; i < ARRAY_SIZE(service_table); i++)
 162                 if (service_table[i].key == err->func)
 163                         break;
 164         if (i < ARRAY_SIZE(service_table))
 165                 serv = service_table[i].msg;
 166         else
 167                 serv = "Unknown service number";
 168
 169         for (i = 0; i < ARRAY_SIZE(error_table); i++)
 170                 if (error_table[i].key == err->retcode)
 171                         break;
 172         if (i < ARRAY_SIZE(error_table))
 173                 printk("%s: %s\n", serv, error_table[i].msg);
 174         else
 175                 printk("%s: Unknown error code %#x\n", serv, err->retcode);
 176
 177         return 0;
 178 } /* report_error */
 179
 180 /* end of code which was in cs.c before */
 181
 182 /*======================================================================*/
 183
 184 void cs_error(struct pcmcia_device *p_dev, int func, int ret)
 185 {
 186         error_info_t err = { func, ret };
 187         pcmcia_report_error(p_dev, &err);
 188 }
 189 EXPORT_SYMBOL(cs_error);
 190
 191
 192 static void pcmcia_check_driver(struct pcmcia_driver *p_drv)
 193 {
 194         struct pcmcia_device_id *did = p_drv->id_table;
 195         unsigned int i;
 196         u32 hash;
 197
 198         if (!p_drv->probe || !p_drv->remove)
 199                 printk(KERN_DEBUG "pcmcia: %s lacks a requisite callback "
 200                        "function\n", p_drv->drv.name);
 201
 202         while (did && did->match_flags) {
 203                 for (i=0; i<4; i++) {
 204                         if (!did->prod_id[i])
 205                                 continue;
 206
 207                         hash = crc32(0, did->prod_id[i], strlen(did->prod_id[i]));
 208                         if (hash == did->prod_id_hash[i])
 209                                 continue;
 210
 211                         printk(KERN_DEBUG "pcmcia: %s: invalid hash for "
 212                                "product string \"%s\": is 0x%x, should "
 213                                "be 0x%x\n", p_drv->drv.name, did->prod_id[i],
 214                                did->prod_id_hash[i], hash);
 215                         printk(KERN_DEBUG "pcmcia: see "
 216                                 "Documentation/pcmcia/devicetable.txt for "
 217                                 "details\n");
 218                 }
 219                 did++;
 220         }
 221
 222         return;
 223 }
 224
 225
 226 /*======================================================================*/
 227
 228
 229 struct pcmcia_dynid {
 230         struct list_head                node;
 231         struct pcmcia_device_id         id;
 232 };
 233
 234 /**
 235  * pcmcia_store_new_id - add a new PCMCIA device ID to this driver and re-probe devices
 236  * @driver: target device driver
 237  * @buf: buffer for scanning device ID data
 238  * @count: input size
 239  *
 240  * Adds a new dynamic PCMCIA device ID to this driver,
 241  * and causes the driver to probe for all devices again.
 242  */
 243 static ssize_t
 244 pcmcia_store_new_id(struct device_driver *driver, const char *buf, size_t count)
 245 {
 246         struct pcmcia_dynid *dynid;
 247         struct pcmcia_driver *pdrv = to_pcmcia_drv(driver);
 248         __u16 match_flags, manf_id, card_id;
 249         __u8 func_id, function, device_no;
 250         __u32 prod_id_hash[4] = {0, 0, 0, 0};
 251         int fields=0;
 252         int retval = 0;
 253
 254         fields = sscanf(buf, "%hx %hx %hx %hhx %hhx %hhx %x %x %x %x",
 255                         &match_flags, &manf_id, &card_id, &func_id, &function, &device_no,
 256                         &prod_id_hash[0], &prod_id_hash[1], &prod_id_hash[2], &prod_id_hash[3]);
 257         if (fields < 6)
 258                 return -EINVAL;
 259
 260         dynid = kzalloc(sizeof(struct pcmcia_dynid), GFP_KERNEL);
 261         if (!dynid)
 262                 return -ENOMEM;
 263
 264         INIT_LIST_HEAD(&dynid->node);
 265         dynid->id.match_flags = match_flags;
 266         dynid->id.manf_id = manf_id;
 267         dynid->id.card_id = card_id;
 268         dynid->id.func_id = func_id;
 269         dynid->id.function = function;
 270         dynid->id.device_no = device_no;
 271         memcpy(dynid->id.prod_id_hash, prod_id_hash, sizeof(__u32) * 4);
 272
 273         spin_lock(&pdrv->dynids.lock);
 274         list_add_tail(&pdrv->dynids.list, &dynid->node);
 275         spin_unlock(&pdrv->dynids.lock);
 276
 277         if (get_driver(&pdrv->drv)) {
 278                 retval = driver_attach(&pdrv->drv);
 279                 put_driver(&pdrv->drv);
 280         }
 281
 282         if (retval)
 283                 return retval;
 284         return count;
 285 }
 286 static DRIVER_ATTR(new_id, S_IWUSR, NULL, pcmcia_store_new_id);
 287
 288 static void
 289 pcmcia_free_dynids(struct pcmcia_driver *drv)
 290 {
 291         struct pcmcia_dynid *dynid, *n;
 292
 293         spin_lock(&drv->dynids.lock);
 294         list_for_each_entry_safe(dynid, n, &drv->dynids.list, node) {
 295                 list_del(&dynid->node);
 296                 kfree(dynid);
 297         }
 298         spin_unlock(&drv->dynids.lock);
 299 }
 300
 301 static int
 302 pcmcia_create_newid_file(struct pcmcia_driver *drv)
 303 {
 304         int error = 0;
 305         if (drv->probe != NULL)
 306                 error = driver_create_file(&drv->drv, &driver_attr_new_id);
 307         return error;
 308 }
 309
 310
 311 /**
 312  * pcmcia_register_driver - register a PCMCIA driver with the bus core
 313  * @driver: the &driver being registered
 314  *
 315  * Registers a PCMCIA driver with the PCMCIA bus core.
 316  */
 317 int pcmcia_register_driver(struct pcmcia_driver *driver)
 318 {
 319         int error;
 320
 321         if (!driver)
 322                 return -EINVAL;
 323
 324         pcmcia_check_driver(driver);
 325
 326         /* initialize common fields */
 327         driver->drv.bus = &pcmcia_bus_type;
 328         driver->drv.owner = driver->owner;
 329         spin_lock_init(&driver->dynids.lock);
 330         INIT_LIST_HEAD(&driver->dynids.list);
 331
 332         ds_dbg(3, "registering driver %s\n", driver->drv.name);
 333
 334         error = driver_register(&driver->drv);
 335         if (error < 0)
 336                 return error;
 337
 338         error = pcmcia_create_newid_file(driver);
 339         if (error)
 340                 driver_unregister(&driver->drv);
 341
 342         return error;
 343 }
 344 EXPORT_SYMBOL(pcmcia_register_driver);
 345
 346 /**
 347  * pcmcia_unregister_driver - unregister a PCMCIA driver with the bus core
 348  * @driver: the &driver being unregistered
 349  */
 350 void pcmcia_unregister_driver(struct pcmcia_driver *driver)
 351 {
 352         ds_dbg(3, "unregistering driver %s\n", driver->drv.name);
 353         driver_unregister(&driver->drv);
 354         pcmcia_free_dynids(driver);
 355 }
 356 EXPORT_SYMBOL(pcmcia_unregister_driver);
 357
 358
 359 /* pcmcia_device handling */
 360
 361 struct pcmcia_device * pcmcia_get_dev(struct pcmcia_device *p_dev)
 362 {
 363         struct device *tmp_dev;
 364         tmp_dev = get_device(&p_dev->dev);
 365         if (!tmp_dev)
 366                 return NULL;
 367         return to_pcmcia_dev(tmp_dev);
 368 }
 369
 370 void pcmcia_put_dev(struct pcmcia_device *p_dev)
 371 {
 372         if (p_dev)
 373                 put_device(&p_dev->dev);
 374 }
 375
 376 static void pcmcia_release_function(struct kref *ref)
 377 {
 378         struct config_t *c = container_of(ref, struct config_t, ref);
 379         ds_dbg(1, "releasing config_t\n");
 380         kfree(c);
 381 }
 382
 383 static void pcmcia_release_dev(struct device *dev)
 384 {
 385         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 386         ds_dev_dbg(1, dev, "releasing device\n");
 387         pcmcia_put_socket(p_dev->socket);
 388         kfree(p_dev->devname);
 389         kref_put(&p_dev->function_config->ref, pcmcia_release_function);
 390         kfree(p_dev);
 391 }
 392
 393 static void pcmcia_add_device_later(struct pcmcia_socket *s, int mfc)
 394 {
 395         if (!s->pcmcia_state.device_add_pending) {
 396                 ds_dev_dbg(1, &s->dev, "scheduling to add %s secondary"
 397                        " device to %d\n", mfc ? "mfc" : "pfc", s->sock);
 398                 s->pcmcia_state.device_add_pending = 1;
 399                 s->pcmcia_state.mfc_pfc = mfc;
 400                 schedule_work(&s->device_add);
 401         }
 402         return;
 403 }
 404
 405 static int pcmcia_device_probe(struct device * dev)
 406 {
 407         struct pcmcia_device *p_dev;
 408         struct pcmcia_driver *p_drv;
 409         struct pcmcia_device_id *did;
 410         struct pcmcia_socket *s;
 411         cistpl_config_t cis_config;
 412         int ret = 0;
 413
 414         dev = get_device(dev);
 415         if (!dev)
 416                 return -ENODEV;
 417
 418         p_dev = to_pcmcia_dev(dev);
 419         p_drv = to_pcmcia_drv(dev->driver);
 420         s = p_dev->socket;
 421
 422         ds_dev_dbg(1, dev, "trying to bind to %s\n", p_drv->drv.name);
 423
 424         if ((!p_drv->probe) || (!p_dev->function_config) ||
 425             (!try_module_get(p_drv->owner))) {
 426                 ret = -EINVAL;
 427                 goto put_dev;
 428         }
 429
 430         /* set up some more device information */
 431         ret = pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_CONFIG,
 432                                 &cis_config);
 433         if (!ret) {
 434                 p_dev->conf.ConfigBase = cis_config.base;
 435                 p_dev->conf.Present = cis_config.rmask[0];
 436         } else {
 437                 dev_printk(KERN_INFO, dev,
 438                            "pcmcia: could not parse base and rmask0 of CIS\n");
 439                 p_dev->conf.ConfigBase = 0;
 440                 p_dev->conf.Present = 0;
 441         }
 442
 443         ret = p_drv->probe(p_dev);
 444         if (ret) {
 445                 ds_dev_dbg(1, dev, "binding to %s failed with %d\n",
 446                            p_drv->drv.name, ret);
 447                 goto put_module;
 448         }
 449
 450         /* handle pseudo multifunction devices:
 451          * there are at most two pseudo multifunction devices.
 452          * if we're matching against the first, schedule a
 453          * call which will then check whether there are two
 454          * pseudo devices, and if not, add the second one.
 455          */
 456         did = p_dev->dev.driver_data;
 457         if (did && (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) &&
 458             (p_dev->socket->device_count == 1) && (p_dev->device_no == 0))
 459                 pcmcia_add_device_later(p_dev->socket, 0);
 460
 461  put_module:
 462         if (ret)
 463                 module_put(p_drv->owner);
 464  put_dev:
 465         if (ret)
 466                 put_device(dev);
 467         return (ret);
 468 }
 469
 470
 471 /*
 472  * Removes a PCMCIA card from the device tree and socket list.
 473  */
 474 static void pcmcia_card_remove(struct pcmcia_socket *s, struct pcmcia_device *leftover)
 475 {
 476         struct pcmcia_device    *p_dev;
 477         struct pcmcia_device    *tmp;
 478         unsigned long           flags;
 479
 480         ds_dev_dbg(2, leftover ? &leftover->dev : &s->dev,
 481                    "pcmcia_card_remove(%d) %s\n", s->sock,
 482                    leftover ? leftover->devname : "");
 483
 484         if (!leftover)
 485                 s->device_count = 0;
 486         else
 487                 s->device_count = 1;
 488
 489         /* unregister all pcmcia_devices registered with this socket, except leftover */
 490         list_for_each_entry_safe(p_dev, tmp, &s->devices_list, socket_device_list) {
 491                 if (p_dev == leftover)
 492                         continue;
 493
 494                 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 495                 list_del(&p_dev->socket_device_list);
 496                 p_dev->_removed=1;
 497                 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 498
 499                 ds_dev_dbg(2, &p_dev->dev, "unregistering device\n");
 500                 device_unregister(&p_dev->dev);
 501         }
 502
 503         return;
 504 }
 505
 506 static int pcmcia_device_remove(struct device * dev)
 507 {
 508         struct pcmcia_device *p_dev;
 509         struct pcmcia_driver *p_drv;
 510         struct pcmcia_device_id *did;
 511         int i;
 512
 513         p_dev = to_pcmcia_dev(dev);
 514         p_drv = to_pcmcia_drv(dev->driver);
 515
 516         ds_dev_dbg(1, dev, "removing device\n");
 517
 518         /* If we're removing the primary module driving a
 519          * pseudo multi-function card, we need to unbind
 520          * all devices
 521          */
 522         did = p_dev->dev.driver_data;
 523         if (did && (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) &&
 524             (p_dev->socket->device_count != 0) &&
 525             (p_dev->device_no == 0))
 526                 pcmcia_card_remove(p_dev->socket, p_dev);
 527
 528         /* detach the "instance" */
 529         if (!p_drv)
 530                 return 0;
 531
 532         if (p_drv->remove)
 533                 p_drv->remove(p_dev);
 534
 535         p_dev->dev_node = NULL;
 536
 537         /* check for proper unloading */
 538         if (p_dev->_irq || p_dev->_io || p_dev->_locked)
 539                 dev_printk(KERN_INFO, dev,
 540                         "pcmcia: driver %s did not release config properly\n",
 541                         p_drv->drv.name);
 542
 543         for (i = 0; i < MAX_WIN; i++)
 544                 if (p_dev->_win & CLIENT_WIN_REQ(i))
 545                         dev_printk(KERN_INFO, dev,
 546                           "pcmcia: driver %s did not release window properly\n",
 547                            p_drv->drv.name);
 548
 549         /* references from pcmcia_probe_device */
 550         pcmcia_put_dev(p_dev);
 551         module_put(p_drv->owner);
 552
 553         return 0;
 554 }
 555
 556
 557 /*
 558  * pcmcia_device_query -- determine information about a pcmcia device
 559  */
 560 static int pcmcia_device_query(struct pcmcia_device *p_dev)
 561 {
 562         cistpl_manfid_t manf_id;
 563         cistpl_funcid_t func_id;
 564         cistpl_vers_1_t *vers1;
 565         unsigned int i;
 566
 567         vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL);
 568         if (!vers1)
 569                 return -ENOMEM;
 570
 571         if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 572                                CISTPL_MANFID, &manf_id)) {
 573                 p_dev->manf_id = manf_id.manf;
 574                 p_dev->card_id = manf_id.card;
 575                 p_dev->has_manf_id = 1;
 576                 p_dev->has_card_id = 1;
 577         }
 578
 579         if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 580                                CISTPL_FUNCID, &func_id)) {
 581                 p_dev->func_id = func_id.func;
 582                 p_dev->has_func_id = 1;
 583         } else {
 584                 /* rule of thumb: cards with no FUNCID, but with
 585                  * common memory device geometry information, are
 586                  * probably memory cards (from pcmcia-cs) */
 587                 cistpl_device_geo_t *devgeo;
 588
 589                 devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL);
 590                 if (!devgeo) {
 591                         kfree(vers1);
 592                         return -ENOMEM;
 593                 }
 594                 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 595                                       CISTPL_DEVICE_GEO, devgeo)) {
 596                         ds_dev_dbg(0, &p_dev->dev,
 597                                    "mem device geometry probably means "
 598                                    "FUNCID_MEMORY\n");
 599                         p_dev->func_id = CISTPL_FUNCID_MEMORY;
 600                         p_dev->has_func_id = 1;
 601                 }
 602                 kfree(devgeo);
 603         }
 604
 605         if (!pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_VERS_1,
 606                                vers1)) {
 607                 for (i=0; i < vers1->ns; i++) {
 608                         char *tmp;
 609                         unsigned int length;
 610
 611                         tmp = vers1->str + vers1->ofs[i];
 612
 613                         length = strlen(tmp) + 1;
 614                         if ((length < 2) || (length > 255))
 615                                 continue;
 616
 617                         p_dev->prod_id[i] = kmalloc(sizeof(char) * length,
 618                                                     GFP_KERNEL);
 619                         if (!p_dev->prod_id[i])
 620                                 continue;
 621
 622                         p_dev->prod_id[i] = strncpy(p_dev->prod_id[i],
 623                                                     tmp, length);
 624                 }
 625         }
 626
 627         kfree(vers1);
 628         return 0;
 629 }
 630
 631
 632 /* device_add_lock is needed to avoid double registration by cardmgr and kernel.
 633  * Serializes pcmcia_device_add; will most likely be removed in future.
 634  *
 635  * While it has the caveat that adding new PCMCIA devices inside(!) device_register()
 636  * won't work, this doesn't matter much at the moment: the driver core doesn't
 637  * support it either.
 638  */
 639 static DEFINE_MUTEX(device_add_lock);
 640
 641 struct pcmcia_device * pcmcia_device_add(struct pcmcia_socket *s, unsigned int function)
 642 {
 643         struct pcmcia_device *p_dev, *tmp_dev;
 644         unsigned long flags;
 645         int bus_id_len;
 646
 647         s = pcmcia_get_socket(s);
 648         if (!s)
 649                 return NULL;
 650
 651         mutex_lock(&device_add_lock);
 652
 653         ds_dbg(3, "adding device to %d, function %d\n", s->sock, function);
 654
 655         /* max of 4 devices per card */
 656         if (s->device_count == 4)
 657                 goto err_put;
 658
 659         p_dev = kzalloc(sizeof(struct pcmcia_device), GFP_KERNEL);
 660         if (!p_dev)
 661                 goto err_put;
 662
 663         p_dev->socket = s;
 664         p_dev->device_no = (s->device_count++);
 665         p_dev->func   = function;
 666
 667         p_dev->dev.bus = &pcmcia_bus_type;
 668         p_dev->dev.parent = s->dev.parent;
 669         p_dev->dev.release = pcmcia_release_dev;
 670         /* by default don't allow DMA */
 671         p_dev->dma_mask = DMA_MASK_NONE;
 672         p_dev->dev.dma_mask = &p_dev->dma_mask;
 673         bus_id_len = sprintf (p_dev->dev.bus_id, "%d.%d", p_dev->socket->sock, p_dev->device_no);
 674
 675         p_dev->devname = kmalloc(6 + bus_id_len + 1, GFP_KERNEL);
 676         if (!p_dev->devname)
 677                 goto err_free;
 678         sprintf (p_dev->devname, "pcmcia%s", p_dev->dev.bus_id);
 679         ds_dev_dbg(3, &p_dev->dev, "devname is %s\n", p_dev->devname);
 680
 681         spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 682
 683         /*
 684          * p_dev->function_config must be the same for all card functions.
 685          * Note that this is serialized by the device_add_lock, so that
 686          * only one such struct will be created.
 687          */
 688         list_for_each_entry(tmp_dev, &s->devices_list, socket_device_list)
 689                 if (p_dev->func == tmp_dev->func) {
 690                         p_dev->function_config = tmp_dev->function_config;
 691                         kref_get(&p_dev->function_config->ref);
 692                 }
 693
 694         /* Add to the list in pcmcia_bus_socket */
 695         list_add(&p_dev->socket_device_list, &s->devices_list);
 696
 697         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 698
 699         if (!p_dev->function_config) {
 700                 ds_dev_dbg(3, &p_dev->dev, "creating config_t\n");
 701                 p_dev->function_config = kzalloc(sizeof(struct config_t),
 702                                                  GFP_KERNEL);
 703                 if (!p_dev->function_config)
 704                         goto err_unreg;
 705                 kref_init(&p_dev->function_config->ref);
 706         }
 707
 708         dev_printk(KERN_NOTICE, &p_dev->dev,
 709                    "pcmcia: registering new device %s\n",
 710                    p_dev->devname);
 711
 712         pcmcia_device_query(p_dev);
 713
 714         if (device_register(&p_dev->dev))
 715                 goto err_unreg;
 716
 717         mutex_unlock(&device_add_lock);
 718
 719         return p_dev;
 720
 721  err_unreg:
 722         spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 723         list_del(&p_dev->socket_device_list);
 724         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 725
 726  err_free:
 727         kfree(p_dev->devname);
 728         kfree(p_dev);
 729         s->device_count--;
 730  err_put:
 731         mutex_unlock(&device_add_lock);
 732         pcmcia_put_socket(s);
 733
 734         return NULL;
 735 }
 736
 737
 738 static int pcmcia_card_add(struct pcmcia_socket *s)
 739 {
 740         cistpl_longlink_mfc_t mfc;
 741         unsigned int no_funcs, i, no_chains;
 742         int ret = 0;
 743
 744         if (!(s->resource_setup_done)) {
 745                 ds_dev_dbg(3, &s->dev,
 746                            "no resources available, delaying card_add\n");
 747                 return -EAGAIN; /* try again, but later... */
 748         }
 749
 750         if (pcmcia_validate_mem(s)) {
 751                 ds_dev_dbg(3, &s->dev, "validating mem resources failed, "
 752                        "delaying card_add\n");
 753                 return -EAGAIN; /* try again, but later... */
 754         }
 755
 756         ret = pccard_validate_cis(s, BIND_FN_ALL, &no_chains);
 757         if (ret || !no_chains) {
 758                 ds_dev_dbg(0, &s->dev, "invalid CIS or invalid resources\n");
 759                 return -ENODEV;
 760         }
 761
 762         if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
 763                 no_funcs = mfc.nfn;
 764         else
 765                 no_funcs = 1;
 766         s->functions = no_funcs;
 767
 768         for (i=0; i < no_funcs; i++)
 769                 pcmcia_device_add(s, i);
 770
 771         return (ret);
 772 }
 773
 774
 775 static void pcmcia_delayed_add_device(struct work_struct *work)
 776 {
 777         struct pcmcia_socket *s =
 778                 container_of(work, struct pcmcia_socket, device_add);
 779         ds_dev_dbg(1, &s->dev, "adding additional device to %d\n", s->sock);
 780         pcmcia_device_add(s, s->pcmcia_state.mfc_pfc);
 781         s->pcmcia_state.device_add_pending = 0;
 782         s->pcmcia_state.mfc_pfc = 0;
 783 }
 784
 785 static int pcmcia_requery(struct device *dev, void * _data)
 786 {
 787         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 788         if (!p_dev->dev.driver) {
 789                 ds_dev_dbg(1, dev, "update device information\n");
 790                 pcmcia_device_query(p_dev);
 791         }
 792
 793         return 0;
 794 }
 795
 796 static void pcmcia_bus_rescan(struct pcmcia_socket *skt, int new_cis)
 797 {
 798         int no_devices = 0;
 799         int ret = 0;
 800         unsigned long flags;
 801
 802         /* must be called with skt_mutex held */
 803         ds_dev_dbg(0, &skt->dev, "re-scanning socket %d\n", skt->sock);
 804
 805         spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 806         if (list_empty(&skt->devices_list))
 807                 no_devices = 1;
 808         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 809
 810         /* If this is because of a CIS override, start over */
 811         if (new_cis && !no_devices)
 812                 pcmcia_card_remove(skt, NULL);
 813
 814         /* if no devices were added for this socket yet because of
 815          * missing resource information or other trouble, we need to
 816          * do this now. */
 817         if (no_devices || new_cis) {
 818                 ret = pcmcia_card_add(skt);
 819                 if (ret)
 820                         return;
 821         }
 822
 823         /* some device information might have changed because of a CIS
 824          * update or because we can finally read it correctly... so
 825          * determine it again, overwriting old values if necessary. */
 826         bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery);
 827
 828         /* we re-scan all devices, not just the ones connected to this
 829          * socket. This does not matter, though. */
 830         ret = bus_rescan_devices(&pcmcia_bus_type);
 831         if (ret)
 832                 printk(KERN_INFO "pcmcia: bus_rescan_devices failed\n");
 833 }
 834
 835 #ifdef CONFIG_PCMCIA_LOAD_CIS
 836
 837 /**
 838  * pcmcia_load_firmware - load CIS from userspace if device-provided is broken
 839  * @dev: the pcmcia device which needs a CIS override
 840  * @filename: requested filename in /lib/firmware/
 841  *
 842  * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if
 843  * the one provided by the card is broken. The firmware files reside in
 844  * /lib/firmware/ in userspace.
 845  */
 846 static int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
 847 {
 848         struct pcmcia_socket *s = dev->socket;
 849         const struct firmware *fw;
 850         char path[FIRMWARE_NAME_MAX];
 851         int ret = -ENOMEM;
 852         int no_funcs;
 853         int old_funcs;
 854         cistpl_longlink_mfc_t mfc;
 855
 856         if (!filename)
 857                 return -EINVAL;
 858
 859         ds_dev_dbg(1, &dev->dev, "trying to load CIS file %s\n", filename);
 860
 861         if (strlen(filename) > (FIRMWARE_NAME_MAX - 1)) {
 862                 dev_printk(KERN_WARNING, &dev->dev,
 863                            "pcmcia: CIS filename is too long [%s]\n",
 864                            filename);
 865                 return -EINVAL;
 866         }
 867
 868         snprintf(path, sizeof(path), "%s", filename);
 869
 870         if (request_firmware(&fw, path, &dev->dev) == 0) {
 871                 if (fw->size >= CISTPL_MAX_CIS_SIZE) {
 872                         ret = -EINVAL;
 873                         dev_printk(KERN_ERR, &dev->dev,
 874                                    "pcmcia: CIS override is too big\n");
 875                         goto release;
 876                 }
 877
 878                 if (!pcmcia_replace_cis(s, fw->data, fw->size))
 879                         ret = 0;
 880                 else {
 881                         dev_printk(KERN_ERR, &dev->dev,
 882                                    "pcmcia: CIS override failed\n");
 883                         goto release;
 884                 }
 885
 886
 887                 /* update information */
 888                 pcmcia_device_query(dev);
 889
 890                 /* does this cis override add or remove functions? */
 891                 old_funcs = s->functions;
 892
 893                 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
 894                         no_funcs = mfc.nfn;
 895                 else
 896                         no_funcs = 1;
 897                 s->functions = no_funcs;
 898
 899                 if (old_funcs > no_funcs)
 900                         pcmcia_card_remove(s, dev);
 901                 else if (no_funcs > old_funcs)
 902                         pcmcia_add_device_later(s, 1);
 903         }
 904  release:
 905         release_firmware(fw);
 906
 907         return (ret);
 908 }
 909
 910 #else /* !CONFIG_PCMCIA_LOAD_CIS */
 911
 912 static inline int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
 913 {
 914         return -ENODEV;
 915 }
 916
 917 #endif
 918
 919
 920 static inline int pcmcia_devmatch(struct pcmcia_device *dev,
 921                                   struct pcmcia_device_id *did)
 922 {
 923         if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
 924                 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
 925                         return 0;
 926         }
 927
 928         if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
 929                 if ((!dev->has_card_id) || (dev->card_id != did->card_id))
 930                         return 0;
 931         }
 932
 933         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
 934                 if (dev->func != did->function)
 935                         return 0;
 936         }
 937
 938         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
 939                 if (!dev->prod_id[0])
 940                         return 0;
 941                 if (strcmp(did->prod_id[0], dev->prod_id[0]))
 942                         return 0;
 943         }
 944
 945         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
 946                 if (!dev->prod_id[1])
 947                         return 0;
 948                 if (strcmp(did->prod_id[1], dev->prod_id[1]))
 949                         return 0;
 950         }
 951
 952         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
 953                 if (!dev->prod_id[2])
 954                         return 0;
 955                 if (strcmp(did->prod_id[2], dev->prod_id[2]))
 956                         return 0;
 957         }
 958
 959         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
 960                 if (!dev->prod_id[3])
 961                         return 0;
 962                 if (strcmp(did->prod_id[3], dev->prod_id[3]))
 963                         return 0;
 964         }
 965
 966         if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
 967                 if (dev->device_no != did->device_no)
 968                         return 0;
 969         }
 970
 971         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
 972                 if ((!dev->has_func_id) || (dev->func_id != did->func_id))
 973                         return 0;
 974
 975                 /* if this is a pseudo-multi-function device,
 976                  * we need explicit matches */
 977                 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO)
 978                         return 0;
 979                 if (dev->device_no)
 980                         return 0;
 981
 982                 /* also, FUNC_ID matching needs to be activated by userspace
 983                  * after it has re-checked that there is no possible module
 984                  * with a prod_id/manf_id/card_id match.
 985                  */
 986                 ds_dev_dbg(0, &dev->dev,
 987                         "skipping FUNC_ID match until userspace interaction\n");
 988                 if (!dev->allow_func_id_match)
 989                         return 0;
 990         }
 991
 992         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
 993                 ds_dev_dbg(0, &dev->dev, "device needs a fake CIS\n");
 994                 if (!dev->socket->fake_cis)
 995                         pcmcia_load_firmware(dev, did->cisfile);
 996
 997                 if (!dev->socket->fake_cis)
 998                         return 0;
 999         }
1000
1001         if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
1002                 int i;
1003                 for (i=0; i<4; i++)
1004                         if (dev->prod_id[i])
1005                                 return 0;
1006                 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
1007                         return 0;
1008         }
1009
1010         dev->dev.driver_data = (void *) did;
1011
1012         return 1;
1013 }
1014
1015
1016 static int pcmcia_bus_match(struct device * dev, struct device_driver * drv) {
1017         struct pcmcia_device * p_dev = to_pcmcia_dev(dev);
1018         struct pcmcia_driver * p_drv = to_pcmcia_drv(drv);
1019         struct pcmcia_device_id *did = p_drv->id_table;
1020         struct pcmcia_dynid *dynid;
1021
1022         /* match dynamic devices first */
1023         spin_lock(&p_drv->dynids.lock);
1024         list_for_each_entry(dynid, &p_drv->dynids.list, node) {
1025                 ds_dev_dbg(3, dev, "trying to match to %s\n", drv->name);
1026                 if (pcmcia_devmatch(p_dev, &dynid->id)) {
1027                         ds_dev_dbg(0, dev, "matched to %s\n", drv->name);
1028                         spin_unlock(&p_drv->dynids.lock);
1029                         return 1;
1030                 }
1031         }
1032         spin_unlock(&p_drv->dynids.lock);
1033
1034 #ifdef CONFIG_PCMCIA_IOCTL
1035         /* matching by cardmgr */
1036         if (p_dev->cardmgr == p_drv) {
1037                 ds_dev_dbg(0, dev, "cardmgr matched to %s\n", drv->name);
1038                 return 1;
1039         }
1040 #endif
1041
1042         while (did && did->match_flags) {
1043                 ds_dev_dbg(3, dev, "trying to match to %s\n", drv->name);
1044                 if (pcmcia_devmatch(p_dev, did)) {
1045                         ds_dev_dbg(0, dev, "matched to %s\n", drv->name);
1046                         return 1;
1047                 }
1048                 did++;
1049         }
1050
1051         return 0;
1052 }
1053
1054 #ifdef CONFIG_HOTPLUG
1055
1056 static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
1057 {
1058         struct pcmcia_device *p_dev;
1059         int i;
1060         u32 hash[4] = { 0, 0, 0, 0};
1061
1062         if (!dev)
1063                 return -ENODEV;
1064
1065         p_dev = to_pcmcia_dev(dev);
1066
1067         /* calculate hashes */
1068         for (i=0; i<4; i++) {
1069                 if (!p_dev->prod_id[i])
1070                         continue;
1071                 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
1072         }
1073
1074         if (add_uevent_var(env, "SOCKET_NO=%u", p_dev->socket->sock))
1075                 return -ENOMEM;
1076
1077         if (add_uevent_var(env, "DEVICE_NO=%02X", p_dev->device_no))
1078                 return -ENOMEM;
1079
1080         if (add_uevent_var(env, "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
1081                            "pa%08Xpb%08Xpc%08Xpd%08X",
1082                            p_dev->has_manf_id ? p_dev->manf_id : 0,
1083                            p_dev->has_card_id ? p_dev->card_id : 0,
1084                            p_dev->has_func_id ? p_dev->func_id : 0,
1085                            p_dev->func,
1086                            p_dev->device_no,
1087                            hash[0],
1088                            hash[1],
1089                            hash[2],
1090                            hash[3]))
1091                 return -ENOMEM;
1092
1093         return 0;
1094 }
1095
1096 #else
1097
1098 static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
1099 {
1100         return -ENODEV;
1101 }
1102
1103 #endif
1104
1105 /************************ runtime PM support ***************************/
1106
1107 static int pcmcia_dev_suspend(struct device *dev, pm_message_t state);
1108 static int pcmcia_dev_resume(struct device *dev);
1109
1110 static int runtime_suspend(struct device *dev)
1111 {
1112         int rc;
1113
1114         down(&dev->sem);
1115         rc = pcmcia_dev_suspend(dev, PMSG_SUSPEND);
1116         up(&dev->sem);
1117         return rc;
1118 }
1119
1120 static void runtime_resume(struct device *dev)
1121 {
1122         int rc;
1123
1124         down(&dev->sem);
1125         rc = pcmcia_dev_resume(dev);
1126         up(&dev->sem);
1127 }
1128
1129 /************************ per-device sysfs output ***************************/
1130
1131 #define pcmcia_device_attr(field, test, format)                         \
1132 static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf)              \
1133 {                                                                       \
1134         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);               \
1135         return p_dev->test ? sprintf (buf, format, p_dev->field) : -ENODEV; \
1136 }
1137
1138 #define pcmcia_device_stringattr(name, field)                                   \
1139 static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf)               \
1140 {                                                                       \
1141         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);               \
1142         return p_dev->field ? sprintf (buf, "%s\n", p_dev->field) : -ENODEV; \
1143 }
1144
1145 pcmcia_device_attr(func, socket, "0x%02x\n");
1146 pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
1147 pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
1148 pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
1149 pcmcia_device_stringattr(prod_id1, prod_id[0]);
1150 pcmcia_device_stringattr(prod_id2, prod_id[1]);
1151 pcmcia_device_stringattr(prod_id3, prod_id[2]);
1152 pcmcia_device_stringattr(prod_id4, prod_id[3]);
1153
1154
1155 static ssize_t pcmcia_show_pm_state(struct device *dev, struct device_attribute *attr, char *buf)
1156 {
1157         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1158
1159         if (p_dev->suspended)
1160                 return sprintf(buf, "off\n");
1161         else
1162                 return sprintf(buf, "on\n");
1163 }
1164
1165 static ssize_t pcmcia_store_pm_state(struct device *dev, struct device_attribute *attr,
1166                                      const char *buf, size_t count)
1167 {
1168         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1169         int ret = 0;
1170
1171         if (!count)
1172                 return -EINVAL;
1173
1174         if ((!p_dev->suspended) && !strncmp(buf, "off", 3))
1175                 ret = runtime_suspend(dev);
1176         else if (p_dev->suspended && !strncmp(buf, "on", 2))
1177                 runtime_resume(dev);
1178
1179         return ret ? ret : count;
1180 }
1181
1182
1183 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1184 {
1185         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1186         int i;
1187         u32 hash[4] = { 0, 0, 0, 0};
1188
1189         /* calculate hashes */
1190         for (i=0; i<4; i++) {
1191                 if (!p_dev->prod_id[i])
1192                         continue;
1193                 hash[i] = crc32(0,p_dev->prod_id[i],strlen(p_dev->prod_id[i]));
1194         }
1195         return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
1196                                 "pa%08Xpb%08Xpc%08Xpd%08X\n",
1197                                 p_dev->has_manf_id ? p_dev->manf_id : 0,
1198                                 p_dev->has_card_id ? p_dev->card_id : 0,
1199                                 p_dev->has_func_id ? p_dev->func_id : 0,
1200                                 p_dev->func, p_dev->device_no,
1201                                 hash[0], hash[1], hash[2], hash[3]);
1202 }
1203
1204 static ssize_t pcmcia_store_allow_func_id_match(struct device *dev,
1205                 struct device_attribute *attr, const char *buf, size_t count)
1206 {
1207         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1208         int ret;
1209
1210         if (!count)
1211                 return -EINVAL;
1212
1213         mutex_lock(&p_dev->socket->skt_mutex);
1214         p_dev->allow_func_id_match = 1;
1215         mutex_unlock(&p_dev->socket->skt_mutex);
1216
1217         ret = bus_rescan_devices(&pcmcia_bus_type);
1218         if (ret)
1219                 printk(KERN_INFO "pcmcia: bus_rescan_devices failed after "
1220                        "allowing func_id matches\n");
1221
1222         return count;
1223 }
1224
1225 static struct device_attribute pcmcia_dev_attrs[] = {
1226         __ATTR(function, 0444, func_show, NULL),
1227         __ATTR(pm_state, 0644, pcmcia_show_pm_state, pcmcia_store_pm_state),
1228         __ATTR_RO(func_id),
1229         __ATTR_RO(manf_id),
1230         __ATTR_RO(card_id),
1231         __ATTR_RO(prod_id1),
1232         __ATTR_RO(prod_id2),
1233         __ATTR_RO(prod_id3),
1234         __ATTR_RO(prod_id4),
1235         __ATTR_RO(modalias),
1236         __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match),
1237         __ATTR_NULL,
1238 };
1239
1240 /* PM support, also needed for reset */
1241
1242 static int pcmcia_dev_suspend(struct device * dev, pm_message_t state)
1243 {
1244         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1245         struct pcmcia_driver *p_drv = NULL;
1246         int ret = 0;
1247
1248         if (p_dev->suspended)
1249                 return 0;
1250
1251         ds_dev_dbg(2, dev, "suspending\n");
1252
1253         if (dev->driver)
1254                 p_drv = to_pcmcia_drv(dev->driver);
1255
1256         if (!p_drv)
1257                 goto out;
1258
1259         if (p_drv->suspend) {
1260                 ret = p_drv->suspend(p_dev);
1261                 if (ret) {
1262                         dev_printk(KERN_ERR, dev,
1263                                    "pcmcia: device %s (driver %s) did "
1264                                    "not want to go to sleep (%d)\n",
1265                                    p_dev->devname, p_drv->drv.name, ret);
1266                         goto out;
1267                 }
1268         }
1269
1270         if (p_dev->device_no == p_dev->func) {
1271                 ds_dev_dbg(2, dev, "releasing configuration\n");
1272                 pcmcia_release_configuration(p_dev);
1273         }
1274
1275  out:
1276         if (!ret)
1277                 p_dev->suspended = 1;
1278         return ret;
1279 }
1280
1281
1282 static int pcmcia_dev_resume(struct device * dev)
1283 {
1284         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1285         struct pcmcia_driver *p_drv = NULL;
1286         int ret = 0;
1287
1288         if (!p_dev->suspended)
1289                 return 0;
1290
1291         ds_dev_dbg(2, dev, "resuming\n");
1292
1293         if (dev->driver)
1294                 p_drv = to_pcmcia_drv(dev->driver);
1295
1296         if (!p_drv)
1297                 goto out;
1298
1299         if (p_dev->device_no == p_dev->func) {
1300                 ds_dev_dbg(2, dev, "requesting configuration\n");
1301                 ret = pcmcia_request_configuration(p_dev, &p_dev->conf);
1302                 if (ret)
1303                         goto out;
1304         }
1305
1306         if (p_drv->resume)
1307                 ret = p_drv->resume(p_dev);
1308
1309  out:
1310         if (!ret)
1311                 p_dev->suspended = 0;
1312         return ret;
1313 }
1314
1315
1316 static int pcmcia_bus_suspend_callback(struct device *dev, void * _data)
1317 {
1318         struct pcmcia_socket *skt = _data;
1319         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1320
1321         if (p_dev->socket != skt || p_dev->suspended)
1322                 return 0;
1323
1324         return runtime_suspend(dev);
1325 }
1326
1327 static int pcmcia_bus_resume_callback(struct device *dev, void * _data)
1328 {
1329         struct pcmcia_socket *skt = _data;
1330         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1331
1332         if (p_dev->socket != skt || !p_dev->suspended)
1333                 return 0;
1334
1335         runtime_resume(dev);
1336
1337         return 0;
1338 }
1339
1340 static int pcmcia_bus_resume(struct pcmcia_socket *skt)
1341 {
1342         ds_dev_dbg(2, &skt->dev, "resuming socket %d\n", skt->sock);
1343         bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback);
1344         return 0;
1345 }
1346
1347 static int pcmcia_bus_suspend(struct pcmcia_socket *skt)
1348 {
1349         ds_dev_dbg(2, &skt->dev, "suspending socket %d\n", skt->sock);
1350         if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt,
1351                              pcmcia_bus_suspend_callback)) {
1352                 pcmcia_bus_resume(skt);
1353                 return -EIO;
1354         }
1355         return 0;
1356 }
1357
1358
1359 /*======================================================================
1360
1361     The card status event handler.
1362
1363 ======================================================================*/
1364
1365 /* Normally, the event is passed to individual drivers after
1366  * informing userspace. Only for CS_EVENT_CARD_REMOVAL this
1367  * is inversed to maintain historic compatibility.
1368  */
1369
1370 static int ds_event(struct pcmcia_socket *skt, event_t event, int priority)
1371 {
1372         struct pcmcia_socket *s = pcmcia_get_socket(skt);
1373
1374         if (!s) {
1375                 dev_printk(KERN_ERR, &skt->dev,
1376                            "PCMCIA obtaining reference to socket "      \
1377                            "failed, event 0x%x lost!\n", event);
1378                 return -ENODEV;
1379         }
1380
1381         ds_dev_dbg(1, &skt->dev, "ds_event(0x%06x, %d, 0x%p)\n",
1382                    event, priority, skt);
1383
1384         switch (event) {
1385         case CS_EVENT_CARD_REMOVAL:
1386                 s->pcmcia_state.present = 0;
1387                 pcmcia_card_remove(skt, NULL);
1388                 handle_event(skt, event);
1389                 break;
1390
1391         case CS_EVENT_CARD_INSERTION:
1392                 s->pcmcia_state.present = 1;
1393                 pcmcia_card_add(skt);
1394                 handle_event(skt, event);
1395                 break;
1396
1397         case CS_EVENT_EJECTION_REQUEST:
1398                 break;
1399
1400         case CS_EVENT_PM_SUSPEND:
1401         case CS_EVENT_PM_RESUME:
1402         case CS_EVENT_RESET_PHYSICAL:
1403         case CS_EVENT_CARD_RESET:
1404         default:
1405                 handle_event(skt, event);
1406                 break;
1407     }
1408
1409     pcmcia_put_socket(s);
1410
1411     return 0;
1412 } /* ds_event */
1413
1414
1415 struct pcmcia_device * pcmcia_dev_present(struct pcmcia_device *_p_dev)
1416 {
1417         struct pcmcia_device *p_dev;
1418         struct pcmcia_device *ret = NULL;
1419
1420         p_dev = pcmcia_get_dev(_p_dev);
1421         if (!p_dev)
1422                 return NULL;
1423
1424         if (!p_dev->socket->pcmcia_state.present)
1425                 goto out;
1426
1427         if (p_dev->_removed)
1428                 goto out;
1429
1430         if (p_dev->suspended)
1431                 goto out;
1432
1433         ret = p_dev;
1434  out:
1435         pcmcia_put_dev(p_dev);
1436         return ret;
1437 }
1438 EXPORT_SYMBOL(pcmcia_dev_present);
1439
1440
1441 static struct pcmcia_callback pcmcia_bus_callback = {
1442         .owner = THIS_MODULE,
1443         .event = ds_event,
1444         .requery = pcmcia_bus_rescan,
1445         .suspend = pcmcia_bus_suspend,
1446         .resume = pcmcia_bus_resume,
1447 };
1448
1449 static int __devinit pcmcia_bus_add_socket(struct device *dev,
1450                                            struct class_interface *class_intf)
1451 {
1452         struct pcmcia_socket *socket = dev_get_drvdata(dev);
1453         int ret;
1454
1455         socket = pcmcia_get_socket(socket);
1456         if (!socket) {
1457                 dev_printk(KERN_ERR, dev,
1458                            "PCMCIA obtaining reference to socket failed\n");
1459                 return -ENODEV;
1460         }
1461
1462         /*
1463          * Ugly. But we want to wait for the socket threads to have started up.
1464          * We really should let the drivers themselves drive some of this..
1465          */
1466         msleep(250);
1467
1468 #ifdef CONFIG_PCMCIA_IOCTL
1469         init_waitqueue_head(&socket->queue);
1470 #endif
1471         INIT_LIST_HEAD(&socket->devices_list);
1472         INIT_WORK(&socket->device_add, pcmcia_delayed_add_device);
1473         memset(&socket->pcmcia_state, 0, sizeof(u8));
1474         socket->device_count = 0;
1475
1476         ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback);
1477         if (ret) {
1478                 dev_printk(KERN_ERR, dev, "PCMCIA registration failed\n");
1479                 pcmcia_put_socket(socket);
1480                 return (ret);
1481         }
1482
1483         return 0;
1484 }
1485
1486 static void pcmcia_bus_remove_socket(struct device *dev,
1487                                      struct class_interface *class_intf)
1488 {
1489         struct pcmcia_socket *socket = dev_get_drvdata(dev);
1490
1491         if (!socket)
1492                 return;
1493
1494         socket->pcmcia_state.dead = 1;
1495         pccard_register_pcmcia(socket, NULL);
1496
1497         /* unregister any unbound devices */
1498         mutex_lock(&socket->skt_mutex);
1499         pcmcia_card_remove(socket, NULL);
1500         mutex_unlock(&socket->skt_mutex);
1501
1502         pcmcia_put_socket(socket);
1503
1504         return;
1505 }
1506
1507
1508 /* the pcmcia_bus_interface is used to handle pcmcia socket devices */
1509 static struct class_interface pcmcia_bus_interface __refdata = {
1510         .class = &pcmcia_socket_class,
1511         .add_dev = &pcmcia_bus_add_socket,
1512         .remove_dev = &pcmcia_bus_remove_socket,
1513 };
1514
1515
1516 struct bus_type pcmcia_bus_type = {
1517         .name = "pcmcia",
1518         .uevent = pcmcia_bus_uevent,
1519         .match = pcmcia_bus_match,
1520         .dev_attrs = pcmcia_dev_attrs,
1521         .probe = pcmcia_device_probe,
1522         .remove = pcmcia_device_remove,
1523         .suspend = pcmcia_dev_suspend,
1524         .resume = pcmcia_dev_resume,
1525 };
1526
1527
1528 static int __init init_pcmcia_bus(void)
1529 {
1530         int ret;
1531
1532         spin_lock_init(&pcmcia_dev_list_lock);
1533
1534         ret = bus_register(&pcmcia_bus_type);
1535         if (ret < 0) {
1536                 printk(KERN_WARNING "pcmcia: bus_register error: %d\n", ret);
1537                 return ret;
1538         }
1539         ret = class_interface_register(&pcmcia_bus_interface);
1540         if (ret < 0) {
1541                 printk(KERN_WARNING
1542                         "pcmcia: class_interface_register error: %d\n", ret);
1543                 bus_unregister(&pcmcia_bus_type);
1544                 return ret;
1545         }
1546
1547         pcmcia_setup_ioctl();
1548
1549         return 0;
1550 }
1551 fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that
1552                                * pcmcia_socket_class is already registered */
1553
1554
1555 static void __exit exit_pcmcia_bus(void)
1556 {
1557         pcmcia_cleanup_ioctl();
1558
1559         class_interface_unregister(&pcmcia_bus_interface);
1560
1561         bus_unregister(&pcmcia_bus_type);
1562 }
1563 module_exit(exit_pcmcia_bus);
1564
1565
1566 MODULE_ALIAS("ds");