linux/drivers/pcmcia/ds.c
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   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
  36/*====================================================================*/
  37
  38/* Module parameters */
  39
  40MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
  41MODULE_DESCRIPTION("PCMCIA Driver Services");
  42MODULE_LICENSE("GPL");
  43
  44#ifdef CONFIG_PCMCIA_DEBUG
  45int ds_pc_debug;
  46
  47module_param_named(pc_debug, ds_pc_debug, int, 0644);
  48
  49#define ds_dbg(lvl, fmt, arg...) do {                           \
  50        if (ds_pc_debug > (lvl))                                \
  51                printk(KERN_DEBUG "ds: " fmt , ## arg);         \
  52} while (0)
  53#define ds_dev_dbg(lvl, dev, fmt, arg...) do {                          \
  54        if (ds_pc_debug > (lvl))                                        \
  55                dev_printk(KERN_DEBUG, dev, "ds: " fmt , ## arg);       \
  56} while (0)
  57#else
  58#define ds_dbg(lvl, fmt, arg...) do { } while (0)
  59#define ds_dev_dbg(lvl, dev, fmt, arg...) do { } while (0)
  60#endif
  61
  62spinlock_t pcmcia_dev_list_lock;
  63
  64/*====================================================================*/
  65
  66/* code which was in cs.c before */
  67
  68/* String tables for error messages */
  69
  70typedef struct lookup_t {
  71    const int key;
  72    const char *msg;
  73} lookup_t;
  74
  75static const lookup_t error_table[] = {
  76    { 0,                        "Operation succeeded" },
  77    { -EIO,                     "Input/Output error" },
  78    { -ENODEV,                  "No card present" },
  79    { -EINVAL,                  "Bad parameter" },
  80    { -EACCES,                  "Configuration locked" },
  81    { -EBUSY,                   "Resource in use" },
  82    { -ENOSPC,                  "No more items" },
  83    { -ENOMEM,                  "Out of resource" },
  84};
  85
  86
  87static const lookup_t service_table[] = {
  88    { AccessConfigurationRegister,      "AccessConfigurationRegister" },
  89    { AddSocketServices,                "AddSocketServices" },
  90    { AdjustResourceInfo,               "AdjustResourceInfo" },
  91    { CheckEraseQueue,                  "CheckEraseQueue" },
  92    { CloseMemory,                      "CloseMemory" },
  93    { DeregisterClient,                 "DeregisterClient" },
  94    { DeregisterEraseQueue,             "DeregisterEraseQueue" },
  95    { GetCardServicesInfo,              "GetCardServicesInfo" },
  96    { GetClientInfo,                    "GetClientInfo" },
  97    { GetConfigurationInfo,             "GetConfigurationInfo" },
  98    { GetEventMask,                     "GetEventMask" },
  99    { GetFirstClient,                   "GetFirstClient" },
 100    { GetFirstRegion,                   "GetFirstRegion" },
 101    { GetFirstTuple,                    "GetFirstTuple" },
 102    { GetNextClient,                    "GetNextClient" },
 103    { GetNextRegion,                    "GetNextRegion" },
 104    { GetNextTuple,                     "GetNextTuple" },
 105    { GetStatus,                        "GetStatus" },
 106    { GetTupleData,                     "GetTupleData" },
 107    { MapMemPage,                       "MapMemPage" },
 108    { ModifyConfiguration,              "ModifyConfiguration" },
 109    { ModifyWindow,                     "ModifyWindow" },
 110    { OpenMemory,                       "OpenMemory" },
 111    { ParseTuple,                       "ParseTuple" },
 112    { ReadMemory,                       "ReadMemory" },
 113    { RegisterClient,                   "RegisterClient" },
 114    { RegisterEraseQueue,               "RegisterEraseQueue" },
 115    { RegisterMTD,                      "RegisterMTD" },
 116    { ReleaseConfiguration,             "ReleaseConfiguration" },
 117    { ReleaseIO,                        "ReleaseIO" },
 118    { ReleaseIRQ,                       "ReleaseIRQ" },
 119    { ReleaseWindow,                    "ReleaseWindow" },
 120    { RequestConfiguration,             "RequestConfiguration" },
 121    { RequestIO,                        "RequestIO" },
 122    { RequestIRQ,                       "RequestIRQ" },
 123    { RequestSocketMask,                "RequestSocketMask" },
 124    { RequestWindow,                    "RequestWindow" },
 125    { ResetCard,                        "ResetCard" },
 126    { SetEventMask,                     "SetEventMask" },
 127    { ValidateCIS,                      "ValidateCIS" },
 128    { WriteMemory,                      "WriteMemory" },
 129    { BindDevice,                       "BindDevice" },
 130    { BindMTD,                          "BindMTD" },
 131    { ReportError,                      "ReportError" },
 132    { SuspendCard,                      "SuspendCard" },
 133    { ResumeCard,                       "ResumeCard" },
 134    { EjectCard,                        "EjectCard" },
 135    { InsertCard,                       "InsertCard" },
 136    { ReplaceCIS,                       "ReplaceCIS" }
 137};
 138
 139const char *pcmcia_error_func(int func)
 140{
 141        int i;
 142
 143        for (i = 0; i < ARRAY_SIZE(service_table); i++)
 144                if (service_table[i].key == func)
 145                        return service_table[i].msg;
 146
 147        return "Unknown service number";
 148}
 149EXPORT_SYMBOL(pcmcia_error_func);
 150
 151const char *pcmcia_error_ret(int ret)
 152{
 153        int i;
 154
 155        for (i = 0; i < ARRAY_SIZE(error_table); i++)
 156                if (error_table[i].key == ret)
 157                        return error_table[i].msg;
 158
 159        return "unknown";
 160}
 161EXPORT_SYMBOL(pcmcia_error_ret);
 162
 163/*======================================================================*/
 164
 165
 166
 167static void pcmcia_check_driver(struct pcmcia_driver *p_drv)
 168{
 169        struct pcmcia_device_id *did = p_drv->id_table;
 170        unsigned int i;
 171        u32 hash;
 172
 173        if (!p_drv->probe || !p_drv->remove)
 174                printk(KERN_DEBUG "pcmcia: %s lacks a requisite callback "
 175                       "function\n", p_drv->drv.name);
 176
 177        while (did && did->match_flags) {
 178                for (i=0; i<4; i++) {
 179                        if (!did->prod_id[i])
 180                                continue;
 181
 182                        hash = crc32(0, did->prod_id[i], strlen(did->prod_id[i]));
 183                        if (hash == did->prod_id_hash[i])
 184                                continue;
 185
 186                        printk(KERN_DEBUG "pcmcia: %s: invalid hash for "
 187                               "product string \"%s\": is 0x%x, should "
 188                               "be 0x%x\n", p_drv->drv.name, did->prod_id[i],
 189                               did->prod_id_hash[i], hash);
 190                        printk(KERN_DEBUG "pcmcia: see "
 191                                "Documentation/pcmcia/devicetable.txt for "
 192                                "details\n");
 193                }
 194                did++;
 195        }
 196
 197        return;
 198}
 199
 200
 201/*======================================================================*/
 202
 203
 204struct pcmcia_dynid {
 205        struct list_head                node;
 206        struct pcmcia_device_id         id;
 207};
 208
 209/**
 210 * pcmcia_store_new_id - add a new PCMCIA device ID to this driver and re-probe devices
 211 * @driver: target device driver
 212 * @buf: buffer for scanning device ID data
 213 * @count: input size
 214 *
 215 * Adds a new dynamic PCMCIA device ID to this driver,
 216 * and causes the driver to probe for all devices again.
 217 */
 218static ssize_t
 219pcmcia_store_new_id(struct device_driver *driver, const char *buf, size_t count)
 220{
 221        struct pcmcia_dynid *dynid;
 222        struct pcmcia_driver *pdrv = to_pcmcia_drv(driver);
 223        __u16 match_flags, manf_id, card_id;
 224        __u8 func_id, function, device_no;
 225        __u32 prod_id_hash[4] = {0, 0, 0, 0};
 226        int fields=0;
 227        int retval = 0;
 228
 229        fields = sscanf(buf, "%hx %hx %hx %hhx %hhx %hhx %x %x %x %x",
 230                        &match_flags, &manf_id, &card_id, &func_id, &function, &device_no,
 231                        &prod_id_hash[0], &prod_id_hash[1], &prod_id_hash[2], &prod_id_hash[3]);
 232        if (fields < 6)
 233                return -EINVAL;
 234
 235        dynid = kzalloc(sizeof(struct pcmcia_dynid), GFP_KERNEL);
 236        if (!dynid)
 237                return -ENOMEM;
 238
 239        INIT_LIST_HEAD(&dynid->node);
 240        dynid->id.match_flags = match_flags;
 241        dynid->id.manf_id = manf_id;
 242        dynid->id.card_id = card_id;
 243        dynid->id.func_id = func_id;
 244        dynid->id.function = function;
 245        dynid->id.device_no = device_no;
 246        memcpy(dynid->id.prod_id_hash, prod_id_hash, sizeof(__u32) * 4);
 247
 248        spin_lock(&pdrv->dynids.lock);
 249        list_add_tail(&pdrv->dynids.list, &dynid->node);
 250        spin_unlock(&pdrv->dynids.lock);
 251
 252        if (get_driver(&pdrv->drv)) {
 253                retval = driver_attach(&pdrv->drv);
 254                put_driver(&pdrv->drv);
 255        }
 256
 257        if (retval)
 258                return retval;
 259        return count;
 260}
 261static DRIVER_ATTR(new_id, S_IWUSR, NULL, pcmcia_store_new_id);
 262
 263static void
 264pcmcia_free_dynids(struct pcmcia_driver *drv)
 265{
 266        struct pcmcia_dynid *dynid, *n;
 267
 268        spin_lock(&drv->dynids.lock);
 269        list_for_each_entry_safe(dynid, n, &drv->dynids.list, node) {
 270                list_del(&dynid->node);
 271                kfree(dynid);
 272        }
 273        spin_unlock(&drv->dynids.lock);
 274}
 275
 276static int
 277pcmcia_create_newid_file(struct pcmcia_driver *drv)
 278{
 279        int error = 0;
 280        if (drv->probe != NULL)
 281                error = driver_create_file(&drv->drv, &driver_attr_new_id);
 282        return error;
 283}
 284
 285
 286/**
 287 * pcmcia_register_driver - register a PCMCIA driver with the bus core
 288 * @driver: the &driver being registered
 289 *
 290 * Registers a PCMCIA driver with the PCMCIA bus core.
 291 */
 292int pcmcia_register_driver(struct pcmcia_driver *driver)
 293{
 294        int error;
 295
 296        if (!driver)
 297                return -EINVAL;
 298
 299        pcmcia_check_driver(driver);
 300
 301        /* initialize common fields */
 302        driver->drv.bus = &pcmcia_bus_type;
 303        driver->drv.owner = driver->owner;
 304        spin_lock_init(&driver->dynids.lock);
 305        INIT_LIST_HEAD(&driver->dynids.list);
 306
 307        ds_dbg(3, "registering driver %s\n", driver->drv.name);
 308
 309        error = driver_register(&driver->drv);
 310        if (error < 0)
 311                return error;
 312
 313        error = pcmcia_create_newid_file(driver);
 314        if (error)
 315                driver_unregister(&driver->drv);
 316
 317        return error;
 318}
 319EXPORT_SYMBOL(pcmcia_register_driver);
 320
 321/**
 322 * pcmcia_unregister_driver - unregister a PCMCIA driver with the bus core
 323 * @driver: the &driver being unregistered
 324 */
 325void pcmcia_unregister_driver(struct pcmcia_driver *driver)
 326{
 327        ds_dbg(3, "unregistering driver %s\n", driver->drv.name);
 328        driver_unregister(&driver->drv);
 329        pcmcia_free_dynids(driver);
 330}
 331EXPORT_SYMBOL(pcmcia_unregister_driver);
 332
 333
 334/* pcmcia_device handling */
 335
 336struct pcmcia_device * pcmcia_get_dev(struct pcmcia_device *p_dev)
 337{
 338        struct device *tmp_dev;
 339        tmp_dev = get_device(&p_dev->dev);
 340        if (!tmp_dev)
 341                return NULL;
 342        return to_pcmcia_dev(tmp_dev);
 343}
 344
 345void pcmcia_put_dev(struct pcmcia_device *p_dev)
 346{
 347        if (p_dev)
 348                put_device(&p_dev->dev);
 349}
 350
 351static void pcmcia_release_function(struct kref *ref)
 352{
 353        struct config_t *c = container_of(ref, struct config_t, ref);
 354        ds_dbg(1, "releasing config_t\n");
 355        kfree(c);
 356}
 357
 358static void pcmcia_release_dev(struct device *dev)
 359{
 360        struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 361        ds_dev_dbg(1, dev, "releasing device\n");
 362        pcmcia_put_socket(p_dev->socket);
 363        kfree(p_dev->devname);
 364        kref_put(&p_dev->function_config->ref, pcmcia_release_function);
 365        kfree(p_dev);
 366}
 367
 368static void pcmcia_add_device_later(struct pcmcia_socket *s, int mfc)
 369{
 370        if (!s->pcmcia_state.device_add_pending) {
 371                ds_dev_dbg(1, &s->dev, "scheduling to add %s secondary"
 372                       " device to %d\n", mfc ? "mfc" : "pfc", s->sock);
 373                s->pcmcia_state.device_add_pending = 1;
 374                s->pcmcia_state.mfc_pfc = mfc;
 375                schedule_work(&s->device_add);
 376        }
 377        return;
 378}
 379
 380static int pcmcia_device_probe(struct device * dev)
 381{
 382        struct pcmcia_device *p_dev;
 383        struct pcmcia_driver *p_drv;
 384        struct pcmcia_device_id *did;
 385        struct pcmcia_socket *s;
 386        cistpl_config_t cis_config;
 387        int ret = 0;
 388
 389        dev = get_device(dev);
 390        if (!dev)
 391                return -ENODEV;
 392
 393        p_dev = to_pcmcia_dev(dev);
 394        p_drv = to_pcmcia_drv(dev->driver);
 395        s = p_dev->socket;
 396
 397        /* The PCMCIA code passes the match data in via dev->driver_data
 398         * which is an ugly hack. Once the driver probe is called it may
 399         * and often will overwrite the match data so we must save it first
 400         *
 401         * handle pseudo multifunction devices:
 402         * there are at most two pseudo multifunction devices.
 403         * if we're matching against the first, schedule a
 404         * call which will then check whether there are two
 405         * pseudo devices, and if not, add the second one.
 406         */
 407        did = p_dev->dev.driver_data;
 408
 409        ds_dev_dbg(1, dev, "trying to bind to %s\n", p_drv->drv.name);
 410
 411        if ((!p_drv->probe) || (!p_dev->function_config) ||
 412            (!try_module_get(p_drv->owner))) {
 413                ret = -EINVAL;
 414                goto put_dev;
 415        }
 416
 417        /* set up some more device information */
 418        ret = pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_CONFIG,
 419                                &cis_config);
 420        if (!ret) {
 421                p_dev->conf.ConfigBase = cis_config.base;
 422                p_dev->conf.Present = cis_config.rmask[0];
 423        } else {
 424                dev_printk(KERN_INFO, dev,
 425                           "pcmcia: could not parse base and rmask0 of CIS\n");
 426                p_dev->conf.ConfigBase = 0;
 427                p_dev->conf.Present = 0;
 428        }
 429
 430        ret = p_drv->probe(p_dev);
 431        if (ret) {
 432                ds_dev_dbg(1, dev, "binding to %s failed with %d\n",
 433                           p_drv->drv.name, ret);
 434                goto put_module;
 435        }
 436
 437        if (did && (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) &&
 438            (p_dev->socket->device_count == 1) && (p_dev->device_no == 0))
 439                pcmcia_add_device_later(p_dev->socket, 0);
 440
 441put_module:
 442        if (ret)
 443                module_put(p_drv->owner);
 444put_dev:
 445        if (ret)
 446                put_device(dev);
 447        return (ret);
 448}
 449
 450
 451/*
 452 * Removes a PCMCIA card from the device tree and socket list.
 453 */
 454static void pcmcia_card_remove(struct pcmcia_socket *s, struct pcmcia_device *leftover)
 455{
 456        struct pcmcia_device    *p_dev;
 457        struct pcmcia_device    *tmp;
 458        unsigned long           flags;
 459
 460        ds_dev_dbg(2, leftover ? &leftover->dev : &s->dev,
 461                   "pcmcia_card_remove(%d) %s\n", s->sock,
 462                   leftover ? leftover->devname : "");
 463
 464        if (!leftover)
 465                s->device_count = 0;
 466        else
 467                s->device_count = 1;
 468
 469        /* unregister all pcmcia_devices registered with this socket, except leftover */
 470        list_for_each_entry_safe(p_dev, tmp, &s->devices_list, socket_device_list) {
 471                if (p_dev == leftover)
 472                        continue;
 473
 474                spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 475                list_del(&p_dev->socket_device_list);
 476                p_dev->_removed=1;
 477                spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 478
 479                ds_dev_dbg(2, &p_dev->dev, "unregistering device\n");
 480                device_unregister(&p_dev->dev);
 481        }
 482
 483        return;
 484}
 485
 486static int pcmcia_device_remove(struct device * dev)
 487{
 488        struct pcmcia_device *p_dev;
 489        struct pcmcia_driver *p_drv;
 490        struct pcmcia_device_id *did;
 491        int i;
 492
 493        p_dev = to_pcmcia_dev(dev);
 494        p_drv = to_pcmcia_drv(dev->driver);
 495
 496        ds_dev_dbg(1, dev, "removing device\n");
 497
 498        /* If we're removing the primary module driving a
 499         * pseudo multi-function card, we need to unbind
 500         * all devices
 501         */
 502        did = p_dev->dev.driver_data;
 503        if (did && (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) &&
 504            (p_dev->socket->device_count != 0) &&
 505            (p_dev->device_no == 0))
 506                pcmcia_card_remove(p_dev->socket, p_dev);
 507
 508        /* detach the "instance" */
 509        if (!p_drv)
 510                return 0;
 511
 512        if (p_drv->remove)
 513                p_drv->remove(p_dev);
 514
 515        p_dev->dev_node = NULL;
 516
 517        /* check for proper unloading */
 518        if (p_dev->_irq || p_dev->_io || p_dev->_locked)
 519                dev_printk(KERN_INFO, dev,
 520                        "pcmcia: driver %s did not release config properly\n",
 521                        p_drv->drv.name);
 522
 523        for (i = 0; i < MAX_WIN; i++)
 524                if (p_dev->_win & CLIENT_WIN_REQ(i))
 525                        dev_printk(KERN_INFO, dev,
 526                          "pcmcia: driver %s did not release window properly\n",
 527                           p_drv->drv.name);
 528
 529        /* references from pcmcia_probe_device */
 530        pcmcia_put_dev(p_dev);
 531        module_put(p_drv->owner);
 532
 533        return 0;
 534}
 535
 536
 537/*
 538 * pcmcia_device_query -- determine information about a pcmcia device
 539 */
 540static int pcmcia_device_query(struct pcmcia_device *p_dev)
 541{
 542        cistpl_manfid_t manf_id;
 543        cistpl_funcid_t func_id;
 544        cistpl_vers_1_t *vers1;
 545        unsigned int i;
 546
 547        vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL);
 548        if (!vers1)
 549                return -ENOMEM;
 550
 551        if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 552                               CISTPL_MANFID, &manf_id)) {
 553                p_dev->manf_id = manf_id.manf;
 554                p_dev->card_id = manf_id.card;
 555                p_dev->has_manf_id = 1;
 556                p_dev->has_card_id = 1;
 557        }
 558
 559        if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 560                               CISTPL_FUNCID, &func_id)) {
 561                p_dev->func_id = func_id.func;
 562                p_dev->has_func_id = 1;
 563        } else {
 564                /* rule of thumb: cards with no FUNCID, but with
 565                 * common memory device geometry information, are
 566                 * probably memory cards (from pcmcia-cs) */
 567                cistpl_device_geo_t *devgeo;
 568
 569                devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL);
 570                if (!devgeo) {
 571                        kfree(vers1);
 572                        return -ENOMEM;
 573                }
 574                if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 575                                      CISTPL_DEVICE_GEO, devgeo)) {
 576                        ds_dev_dbg(0, &p_dev->dev,
 577                                   "mem device geometry probably means "
 578                                   "FUNCID_MEMORY\n");
 579                        p_dev->func_id = CISTPL_FUNCID_MEMORY;
 580                        p_dev->has_func_id = 1;
 581                }
 582                kfree(devgeo);
 583        }
 584
 585        if (!pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_VERS_1,
 586                               vers1)) {
 587                for (i=0; i < vers1->ns; i++) {
 588                        char *tmp;
 589                        unsigned int length;
 590
 591                        tmp = vers1->str + vers1->ofs[i];
 592
 593                        length = strlen(tmp) + 1;
 594                        if ((length < 2) || (length > 255))
 595                                continue;
 596
 597                        p_dev->prod_id[i] = kmalloc(sizeof(char) * length,
 598                                                    GFP_KERNEL);
 599                        if (!p_dev->prod_id[i])
 600                                continue;
 601
 602                        p_dev->prod_id[i] = strncpy(p_dev->prod_id[i],
 603                                                    tmp, length);
 604                }
 605        }
 606
 607        kfree(vers1);
 608        return 0;
 609}
 610
 611
 612/* device_add_lock is needed to avoid double registration by cardmgr and kernel.
 613 * Serializes pcmcia_device_add; will most likely be removed in future.
 614 *
 615 * While it has the caveat that adding new PCMCIA devices inside(!) device_register()
 616 * won't work, this doesn't matter much at the moment: the driver core doesn't
 617 * support it either.
 618 */
 619static DEFINE_MUTEX(device_add_lock);
 620
 621struct pcmcia_device * pcmcia_device_add(struct pcmcia_socket *s, unsigned int function)
 622{
 623        struct pcmcia_device *p_dev, *tmp_dev;
 624        unsigned long flags;
 625
 626        s = pcmcia_get_socket(s);
 627        if (!s)
 628                return NULL;
 629
 630        mutex_lock(&device_add_lock);
 631
 632        ds_dbg(3, "adding device to %d, function %d\n", s->sock, function);
 633
 634        /* max of 4 devices per card */
 635        if (s->device_count == 4)
 636                goto err_put;
 637
 638        p_dev = kzalloc(sizeof(struct pcmcia_device), GFP_KERNEL);
 639        if (!p_dev)
 640                goto err_put;
 641
 642        p_dev->socket = s;
 643        p_dev->device_no = (s->device_count++);
 644        p_dev->func   = function;
 645
 646        p_dev->dev.bus = &pcmcia_bus_type;
 647        p_dev->dev.parent = s->dev.parent;
 648        p_dev->dev.release = pcmcia_release_dev;
 649        /* by default don't allow DMA */
 650        p_dev->dma_mask = DMA_MASK_NONE;
 651        p_dev->dev.dma_mask = &p_dev->dma_mask;
 652        dev_set_name(&p_dev->dev, "%d.%d", p_dev->socket->sock, p_dev->device_no);
 653        if (!dev_name(&p_dev->dev))
 654                goto err_free;
 655        p_dev->devname = kasprintf(GFP_KERNEL, "pcmcia%s", dev_name(&p_dev->dev));
 656        if (!p_dev->devname)
 657                goto err_free;
 658        ds_dev_dbg(3, &p_dev->dev, "devname is %s\n", p_dev->devname);
 659
 660        spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 661
 662        /*
 663         * p_dev->function_config must be the same for all card functions.
 664         * Note that this is serialized by the device_add_lock, so that
 665         * only one such struct will be created.
 666         */
 667        list_for_each_entry(tmp_dev, &s->devices_list, socket_device_list)
 668                if (p_dev->func == tmp_dev->func) {
 669                        p_dev->function_config = tmp_dev->function_config;
 670                        p_dev->io = tmp_dev->io;
 671                        p_dev->irq = tmp_dev->irq;
 672                        kref_get(&p_dev->function_config->ref);
 673                }
 674
 675        /* Add to the list in pcmcia_bus_socket */
 676        list_add(&p_dev->socket_device_list, &s->devices_list);
 677
 678        spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 679
 680        if (!p_dev->function_config) {
 681                ds_dev_dbg(3, &p_dev->dev, "creating config_t\n");
 682                p_dev->function_config = kzalloc(sizeof(struct config_t),
 683                                                 GFP_KERNEL);
 684                if (!p_dev->function_config)
 685                        goto err_unreg;
 686                kref_init(&p_dev->function_config->ref);
 687        }
 688
 689        dev_printk(KERN_NOTICE, &p_dev->dev,
 690                   "pcmcia: registering new device %s\n",
 691                   p_dev->devname);
 692
 693        pcmcia_device_query(p_dev);
 694
 695        if (device_register(&p_dev->dev))
 696                goto err_unreg;
 697
 698        mutex_unlock(&device_add_lock);
 699
 700        return p_dev;
 701
 702 err_unreg:
 703        spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 704        list_del(&p_dev->socket_device_list);
 705        spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 706
 707 err_free:
 708        kfree(p_dev->devname);
 709        kfree(p_dev);
 710        s->device_count--;
 711 err_put:
 712        mutex_unlock(&device_add_lock);
 713        pcmcia_put_socket(s);
 714
 715        return NULL;
 716}
 717
 718
 719static int pcmcia_card_add(struct pcmcia_socket *s)
 720{
 721        cistpl_longlink_mfc_t mfc;
 722        unsigned int no_funcs, i, no_chains;
 723        int ret = 0;
 724
 725        if (!(s->resource_setup_done)) {
 726                ds_dev_dbg(3, &s->dev,
 727                           "no resources available, delaying card_add\n");
 728                return -EAGAIN; /* try again, but later... */
 729        }
 730
 731        if (pcmcia_validate_mem(s)) {
 732                ds_dev_dbg(3, &s->dev, "validating mem resources failed, "
 733                       "delaying card_add\n");
 734                return -EAGAIN; /* try again, but later... */
 735        }
 736
 737        ret = pccard_validate_cis(s, BIND_FN_ALL, &no_chains);
 738        if (ret || !no_chains) {
 739                ds_dev_dbg(0, &s->dev, "invalid CIS or invalid resources\n");
 740                return -ENODEV;
 741        }
 742
 743        if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
 744                no_funcs = mfc.nfn;
 745        else
 746                no_funcs = 1;
 747        s->functions = no_funcs;
 748
 749        for (i=0; i < no_funcs; i++)
 750                pcmcia_device_add(s, i);
 751
 752        return (ret);
 753}
 754
 755
 756static void pcmcia_delayed_add_device(struct work_struct *work)
 757{
 758        struct pcmcia_socket *s =
 759                container_of(work, struct pcmcia_socket, device_add);
 760        ds_dev_dbg(1, &s->dev, "adding additional device to %d\n", s->sock);
 761        pcmcia_device_add(s, s->pcmcia_state.mfc_pfc);
 762        s->pcmcia_state.device_add_pending = 0;
 763        s->pcmcia_state.mfc_pfc = 0;
 764}
 765
 766static int pcmcia_requery(struct device *dev, void * _data)
 767{
 768        struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 769        if (!p_dev->dev.driver) {
 770                ds_dev_dbg(1, dev, "update device information\n");
 771                pcmcia_device_query(p_dev);
 772        }
 773
 774        return 0;
 775}
 776
 777static void pcmcia_bus_rescan(struct pcmcia_socket *skt, int new_cis)
 778{
 779        int no_devices = 0;
 780        int ret = 0;
 781        unsigned long flags;
 782
 783        /* must be called with skt_mutex held */
 784        ds_dev_dbg(0, &skt->dev, "re-scanning socket %d\n", skt->sock);
 785
 786        spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 787        if (list_empty(&skt->devices_list))
 788                no_devices = 1;
 789        spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 790
 791        /* If this is because of a CIS override, start over */
 792        if (new_cis && !no_devices)
 793                pcmcia_card_remove(skt, NULL);
 794
 795        /* if no devices were added for this socket yet because of
 796         * missing resource information or other trouble, we need to
 797         * do this now. */
 798        if (no_devices || new_cis) {
 799                ret = pcmcia_card_add(skt);
 800                if (ret)
 801                        return;
 802        }
 803
 804        /* some device information might have changed because of a CIS
 805         * update or because we can finally read it correctly... so
 806         * determine it again, overwriting old values if necessary. */
 807        bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery);
 808
 809        /* we re-scan all devices, not just the ones connected to this
 810         * socket. This does not matter, though. */
 811        ret = bus_rescan_devices(&pcmcia_bus_type);
 812        if (ret)
 813                printk(KERN_INFO "pcmcia: bus_rescan_devices failed\n");
 814}
 815
 816#ifdef CONFIG_PCMCIA_LOAD_CIS
 817
 818/**
 819 * pcmcia_load_firmware - load CIS from userspace if device-provided is broken
 820 * @dev: the pcmcia device which needs a CIS override
 821 * @filename: requested filename in /lib/firmware/
 822 *
 823 * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if
 824 * the one provided by the card is broken. The firmware files reside in
 825 * /lib/firmware/ in userspace.
 826 */
 827static int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
 828{
 829        struct pcmcia_socket *s = dev->socket;
 830        const struct firmware *fw;
 831        char path[FIRMWARE_NAME_MAX];
 832        int ret = -ENOMEM;
 833        int no_funcs;
 834        int old_funcs;
 835        cistpl_longlink_mfc_t mfc;
 836
 837        if (!filename)
 838                return -EINVAL;
 839
 840        ds_dev_dbg(1, &dev->dev, "trying to load CIS file %s\n", filename);
 841
 842        if (strlen(filename) > (FIRMWARE_NAME_MAX - 1)) {
 843                dev_printk(KERN_WARNING, &dev->dev,
 844                           "pcmcia: CIS filename is too long [%s]\n",
 845                           filename);
 846                return -EINVAL;
 847        }
 848
 849        snprintf(path, sizeof(path), "%s", filename);
 850
 851        if (request_firmware(&fw, path, &dev->dev) == 0) {
 852                if (fw->size >= CISTPL_MAX_CIS_SIZE) {
 853                        ret = -EINVAL;
 854                        dev_printk(KERN_ERR, &dev->dev,
 855                                   "pcmcia: CIS override is too big\n");
 856                        goto release;
 857                }
 858
 859                if (!pcmcia_replace_cis(s, fw->data, fw->size))
 860                        ret = 0;
 861                else {
 862                        dev_printk(KERN_ERR, &dev->dev,
 863                                   "pcmcia: CIS override failed\n");
 864                        goto release;
 865                }
 866
 867
 868                /* update information */
 869                pcmcia_device_query(dev);
 870
 871                /* does this cis override add or remove functions? */
 872                old_funcs = s->functions;
 873
 874                if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
 875                        no_funcs = mfc.nfn;
 876                else
 877                        no_funcs = 1;
 878                s->functions = no_funcs;
 879
 880                if (old_funcs > no_funcs)
 881                        pcmcia_card_remove(s, dev);
 882                else if (no_funcs > old_funcs)
 883                        pcmcia_add_device_later(s, 1);
 884        }
 885 release:
 886        release_firmware(fw);
 887
 888        return (ret);
 889}
 890
 891#else /* !CONFIG_PCMCIA_LOAD_CIS */
 892
 893static inline int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
 894{
 895        return -ENODEV;
 896}
 897
 898#endif
 899
 900
 901static inline int pcmcia_devmatch(struct pcmcia_device *dev,
 902                                  struct pcmcia_device_id *did)
 903{
 904        if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
 905                if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
 906                        return 0;
 907        }
 908
 909        if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
 910                if ((!dev->has_card_id) || (dev->card_id != did->card_id))
 911                        return 0;
 912        }
 913
 914        if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
 915                if (dev->func != did->function)
 916                        return 0;
 917        }
 918
 919        if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
 920                if (!dev->prod_id[0])
 921                        return 0;
 922                if (strcmp(did->prod_id[0], dev->prod_id[0]))
 923                        return 0;
 924        }
 925
 926        if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
 927                if (!dev->prod_id[1])
 928                        return 0;
 929                if (strcmp(did->prod_id[1], dev->prod_id[1]))
 930                        return 0;
 931        }
 932
 933        if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
 934                if (!dev->prod_id[2])
 935                        return 0;
 936                if (strcmp(did->prod_id[2], dev->prod_id[2]))
 937                        return 0;
 938        }
 939
 940        if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
 941                if (!dev->prod_id[3])
 942                        return 0;
 943                if (strcmp(did->prod_id[3], dev->prod_id[3]))
 944                        return 0;
 945        }
 946
 947        if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
 948                if (dev->device_no != did->device_no)
 949                        return 0;
 950        }
 951
 952        if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
 953                if ((!dev->has_func_id) || (dev->func_id != did->func_id))
 954                        return 0;
 955
 956                /* if this is a pseudo-multi-function device,
 957                 * we need explicit matches */
 958                if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO)
 959                        return 0;
 960                if (dev->device_no)
 961                        return 0;
 962
 963                /* also, FUNC_ID matching needs to be activated by userspace
 964                 * after it has re-checked that there is no possible module
 965                 * with a prod_id/manf_id/card_id match.
 966                 */
 967                ds_dev_dbg(0, &dev->dev,
 968                        "skipping FUNC_ID match until userspace interaction\n");
 969                if (!dev->allow_func_id_match)
 970                        return 0;
 971        }
 972
 973        if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
 974                ds_dev_dbg(0, &dev->dev, "device needs a fake CIS\n");
 975                if (!dev->socket->fake_cis)
 976                        pcmcia_load_firmware(dev, did->cisfile);
 977
 978                if (!dev->socket->fake_cis)
 979                        return 0;
 980        }
 981
 982        if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
 983                int i;
 984                for (i=0; i<4; i++)
 985                        if (dev->prod_id[i])
 986                                return 0;
 987                if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
 988                        return 0;
 989        }
 990
 991        dev->dev.driver_data = (void *) did;
 992
 993        return 1;
 994}
 995
 996
 997static int pcmcia_bus_match(struct device * dev, struct device_driver * drv) {
 998        struct pcmcia_device * p_dev = to_pcmcia_dev(dev);
 999        struct pcmcia_driver * p_drv = to_pcmcia_drv(drv);
1000        struct pcmcia_device_id *did = p_drv->id_table;
1001        struct pcmcia_dynid *dynid;
1002
1003        /* match dynamic devices first */
1004        spin_lock(&p_drv->dynids.lock);
1005        list_for_each_entry(dynid, &p_drv->dynids.list, node) {
1006                ds_dev_dbg(3, dev, "trying to match to %s\n", drv->name);
1007                if (pcmcia_devmatch(p_dev, &dynid->id)) {
1008                        ds_dev_dbg(0, dev, "matched to %s\n", drv->name);
1009                        spin_unlock(&p_drv->dynids.lock);
1010                        return 1;
1011                }
1012        }
1013        spin_unlock(&p_drv->dynids.lock);
1014
1015#ifdef CONFIG_PCMCIA_IOCTL
1016        /* matching by cardmgr */
1017        if (p_dev->cardmgr == p_drv) {
1018                ds_dev_dbg(0, dev, "cardmgr matched to %s\n", drv->name);
1019                return 1;
1020        }
1021#endif
1022
1023        while (did && did->match_flags) {
1024                ds_dev_dbg(3, dev, "trying to match to %s\n", drv->name);
1025                if (pcmcia_devmatch(p_dev, did)) {
1026                        ds_dev_dbg(0, dev, "matched to %s\n", drv->name);
1027                        return 1;
1028                }
1029                did++;
1030        }
1031
1032        return 0;
1033}
1034
1035#ifdef CONFIG_HOTPLUG
1036
1037static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
1038{
1039        struct pcmcia_device *p_dev;
1040        int i;
1041        u32 hash[4] = { 0, 0, 0, 0};
1042
1043        if (!dev)
1044                return -ENODEV;
1045
1046        p_dev = to_pcmcia_dev(dev);
1047
1048        /* calculate hashes */
1049        for (i=0; i<4; i++) {
1050                if (!p_dev->prod_id[i])
1051                        continue;
1052                hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
1053        }
1054
1055        if (add_uevent_var(env, "SOCKET_NO=%u", p_dev->socket->sock))
1056                return -ENOMEM;
1057
1058        if (add_uevent_var(env, "DEVICE_NO=%02X", p_dev->device_no))
1059                return -ENOMEM;
1060
1061        if (add_uevent_var(env, "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
1062                           "pa%08Xpb%08Xpc%08Xpd%08X",
1063                           p_dev->has_manf_id ? p_dev->manf_id : 0,
1064                           p_dev->has_card_id ? p_dev->card_id : 0,
1065                           p_dev->has_func_id ? p_dev->func_id : 0,
1066                           p_dev->func,
1067                           p_dev->device_no,
1068                           hash[0],
1069                           hash[1],
1070                           hash[2],
1071                           hash[3]))
1072                return -ENOMEM;
1073
1074        return 0;
1075}
1076
1077#else
1078
1079static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
1080{
1081        return -ENODEV;
1082}
1083
1084#endif
1085
1086/************************ runtime PM support ***************************/
1087
1088static int pcmcia_dev_suspend(struct device *dev, pm_message_t state);
1089static int pcmcia_dev_resume(struct device *dev);
1090
1091static int runtime_suspend(struct device *dev)
1092{
1093        int rc;
1094
1095        down(&dev->sem);
1096        rc = pcmcia_dev_suspend(dev, PMSG_SUSPEND);
1097        up(&dev->sem);
1098        return rc;
1099}
1100
1101static void runtime_resume(struct device *dev)
1102{
1103        int rc;
1104
1105        down(&dev->sem);
1106        rc = pcmcia_dev_resume(dev);
1107        up(&dev->sem);
1108}
1109
1110/************************ per-device sysfs output ***************************/
1111
1112#define pcmcia_device_attr(field, test, format)                         \
1113static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf)              \
1114{                                                                       \
1115        struct pcmcia_device *p_dev = to_pcmcia_dev(dev);               \
1116        return p_dev->test ? sprintf (buf, format, p_dev->field) : -ENODEV; \
1117}
1118
1119#define pcmcia_device_stringattr(name, field)                                   \
1120static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf)               \
1121{                                                                       \
1122        struct pcmcia_device *p_dev = to_pcmcia_dev(dev);               \
1123        return p_dev->field ? sprintf (buf, "%s\n", p_dev->field) : -ENODEV; \
1124}
1125
1126pcmcia_device_attr(func, socket, "0x%02x\n");
1127pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
1128pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
1129pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
1130pcmcia_device_stringattr(prod_id1, prod_id[0]);
1131pcmcia_device_stringattr(prod_id2, prod_id[1]);
1132pcmcia_device_stringattr(prod_id3, prod_id[2]);
1133pcmcia_device_stringattr(prod_id4, prod_id[3]);
1134
1135
1136static ssize_t pcmcia_show_pm_state(struct device *dev, struct device_attribute *attr, char *buf)
1137{
1138        struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1139
1140        if (p_dev->suspended)
1141                return sprintf(buf, "off\n");
1142        else
1143                return sprintf(buf, "on\n");
1144}
1145
1146static ssize_t pcmcia_store_pm_state(struct device *dev, struct device_attribute *attr,
1147                                     const char *buf, size_t count)
1148{
1149        struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1150        int ret = 0;
1151
1152        if (!count)
1153                return -EINVAL;
1154
1155        if ((!p_dev->suspended) && !strncmp(buf, "off", 3))
1156                ret = runtime_suspend(dev);
1157        else if (p_dev->suspended && !strncmp(buf, "on", 2))
1158                runtime_resume(dev);
1159
1160        return ret ? ret : count;
1161}
1162
1163
1164static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1165{
1166        struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1167        int i;
1168        u32 hash[4] = { 0, 0, 0, 0};
1169
1170        /* calculate hashes */
1171        for (i=0; i<4; i++) {
1172                if (!p_dev->prod_id[i])
1173                        continue;
1174                hash[i] = crc32(0,p_dev->prod_id[i],strlen(p_dev->prod_id[i]));
1175        }
1176        return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
1177                                "pa%08Xpb%08Xpc%08Xpd%08X\n",
1178                                p_dev->has_manf_id ? p_dev->manf_id : 0,
1179                                p_dev->has_card_id ? p_dev->card_id : 0,
1180                                p_dev->has_func_id ? p_dev->func_id : 0,
1181                                p_dev->func, p_dev->device_no,
1182                                hash[0], hash[1], hash[2], hash[3]);
1183}
1184
1185static ssize_t pcmcia_store_allow_func_id_match(struct device *dev,
1186                struct device_attribute *attr, const char *buf, size_t count)
1187{
1188        struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1189        int ret;
1190
1191        if (!count)
1192                return -EINVAL;
1193
1194        mutex_lock(&p_dev->socket->skt_mutex);
1195        p_dev->allow_func_id_match = 1;
1196        mutex_unlock(&p_dev->socket->skt_mutex);
1197
1198        ret = bus_rescan_devices(&pcmcia_bus_type);
1199        if (ret)
1200                printk(KERN_INFO "pcmcia: bus_rescan_devices failed after "
1201                       "allowing func_id matches\n");
1202
1203        return count;
1204}
1205
1206static struct device_attribute pcmcia_dev_attrs[] = {
1207        __ATTR(function, 0444, func_show, NULL),
1208        __ATTR(pm_state, 0644, pcmcia_show_pm_state, pcmcia_store_pm_state),
1209        __ATTR_RO(func_id),
1210        __ATTR_RO(manf_id),
1211        __ATTR_RO(card_id),
1212        __ATTR_RO(prod_id1),
1213        __ATTR_RO(prod_id2),
1214        __ATTR_RO(prod_id3),
1215        __ATTR_RO(prod_id4),
1216        __ATTR_RO(modalias),
1217        __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match),
1218        __ATTR_NULL,
1219};
1220
1221/* PM support, also needed for reset */
1222
1223static int pcmcia_dev_suspend(struct device * dev, pm_message_t state)
1224{
1225        struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1226        struct pcmcia_driver *p_drv = NULL;
1227        int ret = 0;
1228
1229        if (p_dev->suspended)
1230                return 0;
1231
1232        ds_dev_dbg(2, dev, "suspending\n");
1233
1234        if (dev->driver)
1235                p_drv = to_pcmcia_drv(dev->driver);
1236
1237        if (!p_drv)
1238                goto out;
1239
1240        if (p_drv->suspend) {
1241                ret = p_drv->suspend(p_dev);
1242                if (ret) {
1243                        dev_printk(KERN_ERR, dev,
1244                                   "pcmcia: device %s (driver %s) did "
1245                                   "not want to go to sleep (%d)\n",
1246                                   p_dev->devname, p_drv->drv.name, ret);
1247                        goto out;
1248                }
1249        }
1250
1251        if (p_dev->device_no == p_dev->func) {
1252                ds_dev_dbg(2, dev, "releasing configuration\n");
1253                pcmcia_release_configuration(p_dev);
1254        }
1255
1256 out:
1257        if (!ret)
1258                p_dev->suspended = 1;
1259        return ret;
1260}
1261
1262
1263static int pcmcia_dev_resume(struct device * dev)
1264{
1265        struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1266        struct pcmcia_driver *p_drv = NULL;
1267        int ret = 0;
1268
1269        if (!p_dev->suspended)
1270                return 0;
1271
1272        ds_dev_dbg(2, dev, "resuming\n");
1273
1274        if (dev->driver)
1275                p_drv = to_pcmcia_drv(dev->driver);
1276
1277        if (!p_drv)
1278                goto out;
1279
1280        if (p_dev->device_no == p_dev->func) {
1281                ds_dev_dbg(2, dev, "requesting configuration\n");
1282                ret = pcmcia_request_configuration(p_dev, &p_dev->conf);
1283                if (ret)
1284                        goto out;
1285        }
1286
1287        if (p_drv->resume)
1288                ret = p_drv->resume(p_dev);
1289
1290 out:
1291        if (!ret)
1292                p_dev->suspended = 0;
1293        return ret;
1294}
1295
1296
1297static int pcmcia_bus_suspend_callback(struct device *dev, void * _data)
1298{
1299        struct pcmcia_socket *skt = _data;
1300        struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1301
1302        if (p_dev->socket != skt || p_dev->suspended)
1303                return 0;
1304
1305        return runtime_suspend(dev);
1306}
1307
1308static int pcmcia_bus_resume_callback(struct device *dev, void * _data)
1309{
1310        struct pcmcia_socket *skt = _data;
1311        struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1312
1313        if (p_dev->socket != skt || !p_dev->suspended)
1314                return 0;
1315
1316        runtime_resume(dev);
1317
1318        return 0;
1319}
1320
1321static int pcmcia_bus_resume(struct pcmcia_socket *skt)
1322{
1323        ds_dev_dbg(2, &skt->dev, "resuming socket %d\n", skt->sock);
1324        bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback);
1325        return 0;
1326}
1327
1328static int pcmcia_bus_suspend(struct pcmcia_socket *skt)
1329{
1330        ds_dev_dbg(2, &skt->dev, "suspending socket %d\n", skt->sock);
1331        if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt,
1332                             pcmcia_bus_suspend_callback)) {
1333                pcmcia_bus_resume(skt);
1334                return -EIO;
1335        }
1336        return 0;
1337}
1338
1339
1340/*======================================================================
1341
1342    The card status event handler.
1343    
1344======================================================================*/
1345
1346/* Normally, the event is passed to individual drivers after
1347 * informing userspace. Only for CS_EVENT_CARD_REMOVAL this
1348 * is inversed to maintain historic compatibility.
1349 */
1350
1351static int ds_event(struct pcmcia_socket *skt, event_t event, int priority)
1352{
1353        struct pcmcia_socket *s = pcmcia_get_socket(skt);
1354
1355        if (!s) {
1356                dev_printk(KERN_ERR, &skt->dev,
1357                           "PCMCIA obtaining reference to socket "      \
1358                           "failed, event 0x%x lost!\n", event);
1359                return -ENODEV;
1360        }
1361
1362        ds_dev_dbg(1, &skt->dev, "ds_event(0x%06x, %d, 0x%p)\n",
1363                   event, priority, skt);
1364
1365        switch (event) {
1366        case CS_EVENT_CARD_REMOVAL:
1367                s->pcmcia_state.present = 0;
1368                pcmcia_card_remove(skt, NULL);
1369                handle_event(skt, event);
1370                break;
1371
1372        case CS_EVENT_CARD_INSERTION:
1373                s->pcmcia_state.present = 1;
1374                pcmcia_card_add(skt);
1375                handle_event(skt, event);
1376                break;
1377
1378        case CS_EVENT_EJECTION_REQUEST:
1379                break;
1380
1381        case CS_EVENT_PM_SUSPEND:
1382        case CS_EVENT_PM_RESUME:
1383        case CS_EVENT_RESET_PHYSICAL:
1384        case CS_EVENT_CARD_RESET:
1385        default:
1386                handle_event(skt, event);
1387                break;
1388    }
1389
1390    pcmcia_put_socket(s);
1391
1392    return 0;
1393} /* ds_event */
1394
1395
1396struct pcmcia_device * pcmcia_dev_present(struct pcmcia_device *_p_dev)
1397{
1398        struct pcmcia_device *p_dev;
1399        struct pcmcia_device *ret = NULL;
1400
1401        p_dev = pcmcia_get_dev(_p_dev);
1402        if (!p_dev)
1403                return NULL;
1404
1405        if (!p_dev->socket->pcmcia_state.present)
1406                goto out;
1407
1408        if (p_dev->_removed)
1409                goto out;
1410
1411        if (p_dev->suspended)
1412                goto out;
1413
1414        ret = p_dev;
1415 out:
1416        pcmcia_put_dev(p_dev);
1417        return ret;
1418}
1419EXPORT_SYMBOL(pcmcia_dev_present);
1420
1421
1422static struct pcmcia_callback pcmcia_bus_callback = {
1423        .owner = THIS_MODULE,
1424        .event = ds_event,
1425        .requery = pcmcia_bus_rescan,
1426        .suspend = pcmcia_bus_suspend,
1427        .resume = pcmcia_bus_resume,
1428};
1429
1430static int __devinit pcmcia_bus_add_socket(struct device *dev,
1431                                           struct class_interface *class_intf)
1432{
1433        struct pcmcia_socket *socket = dev_get_drvdata(dev);
1434        int ret;
1435
1436        socket = pcmcia_get_socket(socket);
1437        if (!socket) {
1438                dev_printk(KERN_ERR, dev,
1439                           "PCMCIA obtaining reference to socket failed\n");
1440                return -ENODEV;
1441        }
1442
1443        /*
1444         * Ugly. But we want to wait for the socket threads to have started up.
1445         * We really should let the drivers themselves drive some of this..
1446         */
1447        msleep(250);
1448
1449#ifdef CONFIG_PCMCIA_IOCTL
1450        init_waitqueue_head(&socket->queue);
1451#endif
1452        INIT_LIST_HEAD(&socket->devices_list);
1453        INIT_WORK(&socket->device_add, pcmcia_delayed_add_device);
1454        memset(&socket->pcmcia_state, 0, sizeof(u8));
1455        socket->device_count = 0;
1456
1457        ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback);
1458        if (ret) {
1459                dev_printk(KERN_ERR, dev, "PCMCIA registration failed\n");
1460                pcmcia_put_socket(socket);
1461                return (ret);
1462        }
1463
1464        return 0;
1465}
1466
1467static void pcmcia_bus_remove_socket(struct device *dev,
1468                                     struct class_interface *class_intf)
1469{
1470        struct pcmcia_socket *socket = dev_get_drvdata(dev);
1471
1472        if (!socket)
1473                return;
1474
1475        socket->pcmcia_state.dead = 1;
1476        pccard_register_pcmcia(socket, NULL);
1477
1478        /* unregister any unbound devices */
1479        mutex_lock(&socket->skt_mutex);
1480        pcmcia_card_remove(socket, NULL);
1481        mutex_unlock(&socket->skt_mutex);
1482
1483        pcmcia_put_socket(socket);
1484
1485        return;
1486}
1487
1488
1489/* the pcmcia_bus_interface is used to handle pcmcia socket devices */
1490static struct class_interface pcmcia_bus_interface __refdata = {
1491        .class = &pcmcia_socket_class,
1492        .add_dev = &pcmcia_bus_add_socket,
1493        .remove_dev = &pcmcia_bus_remove_socket,
1494};
1495
1496
1497struct bus_type pcmcia_bus_type = {
1498        .name = "pcmcia",
1499        .uevent = pcmcia_bus_uevent,
1500        .match = pcmcia_bus_match,
1501        .dev_attrs = pcmcia_dev_attrs,
1502        .probe = pcmcia_device_probe,
1503        .remove = pcmcia_device_remove,
1504        .suspend = pcmcia_dev_suspend,
1505        .resume = pcmcia_dev_resume,
1506};
1507
1508
1509static int __init init_pcmcia_bus(void)
1510{
1511        int ret;
1512
1513        spin_lock_init(&pcmcia_dev_list_lock);
1514
1515        ret = bus_register(&pcmcia_bus_type);
1516        if (ret < 0) {
1517                printk(KERN_WARNING "pcmcia: bus_register error: %d\n", ret);
1518                return ret;
1519        }
1520        ret = class_interface_register(&pcmcia_bus_interface);
1521        if (ret < 0) {
1522                printk(KERN_WARNING
1523                        "pcmcia: class_interface_register error: %d\n", ret);
1524                bus_unregister(&pcmcia_bus_type);
1525                return ret;
1526        }
1527
1528        pcmcia_setup_ioctl();
1529
1530        return 0;
1531}
1532fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that 
1533                               * pcmcia_socket_class is already registered */
1534
1535
1536static void __exit exit_pcmcia_bus(void)
1537{
1538        pcmcia_cleanup_ioctl();
1539
1540        class_interface_unregister(&pcmcia_bus_interface);
1541
1542        bus_unregister(&pcmcia_bus_type);
1543}
1544module_exit(exit_pcmcia_bus);
1545
1546
1547MODULE_ALIAS("ds");
1548