linux/drivers/pcmcia/ds.c
<<
>>
Prefs
   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 - 2010      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#include <linux/slab.h>
  28
  29#include <pcmcia/cistpl.h>
  30#include <pcmcia/ds.h>
  31#include <pcmcia/ss.h>
  32
  33#include "cs_internal.h"
  34
  35/*====================================================================*/
  36
  37/* Module parameters */
  38
  39MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
  40MODULE_DESCRIPTION("PCMCIA Driver Services");
  41MODULE_LICENSE("GPL");
  42
  43
  44/*====================================================================*/
  45
  46static void pcmcia_check_driver(struct pcmcia_driver *p_drv)
  47{
  48        struct pcmcia_device_id *did = p_drv->id_table;
  49        unsigned int i;
  50        u32 hash;
  51
  52        if (!p_drv->probe || !p_drv->remove)
  53                printk(KERN_DEBUG "pcmcia: %s lacks a requisite callback "
  54                       "function\n", p_drv->name);
  55
  56        while (did && did->match_flags) {
  57                for (i = 0; i < 4; i++) {
  58                        if (!did->prod_id[i])
  59                                continue;
  60
  61                        hash = crc32(0, did->prod_id[i], strlen(did->prod_id[i]));
  62                        if (hash == did->prod_id_hash[i])
  63                                continue;
  64
  65                        printk(KERN_DEBUG "pcmcia: %s: invalid hash for "
  66                               "product string \"%s\": is 0x%x, should "
  67                               "be 0x%x\n", p_drv->name, did->prod_id[i],
  68                               did->prod_id_hash[i], hash);
  69                        printk(KERN_DEBUG "pcmcia: see "
  70                                "Documentation/pcmcia/devicetable.txt for "
  71                                "details\n");
  72                }
  73                did++;
  74        }
  75
  76        return;
  77}
  78
  79
  80/*======================================================================*/
  81
  82
  83struct pcmcia_dynid {
  84        struct list_head                node;
  85        struct pcmcia_device_id         id;
  86};
  87
  88/**
  89 * pcmcia_store_new_id - add a new PCMCIA device ID to this driver and re-probe devices
  90 * @driver: target device driver
  91 * @buf: buffer for scanning device ID data
  92 * @count: input size
  93 *
  94 * Adds a new dynamic PCMCIA device ID to this driver,
  95 * and causes the driver to probe for all devices again.
  96 */
  97static ssize_t
  98pcmcia_store_new_id(struct device_driver *driver, const char *buf, size_t count)
  99{
 100        struct pcmcia_dynid *dynid;
 101        struct pcmcia_driver *pdrv = to_pcmcia_drv(driver);
 102        __u16 match_flags, manf_id, card_id;
 103        __u8 func_id, function, device_no;
 104        __u32 prod_id_hash[4] = {0, 0, 0, 0};
 105        int fields = 0;
 106        int retval = 0;
 107
 108        fields = sscanf(buf, "%hx %hx %hx %hhx %hhx %hhx %x %x %x %x",
 109                        &match_flags, &manf_id, &card_id, &func_id, &function, &device_no,
 110                        &prod_id_hash[0], &prod_id_hash[1], &prod_id_hash[2], &prod_id_hash[3]);
 111        if (fields < 6)
 112                return -EINVAL;
 113
 114        dynid = kzalloc(sizeof(struct pcmcia_dynid), GFP_KERNEL);
 115        if (!dynid)
 116                return -ENOMEM;
 117
 118        dynid->id.match_flags = match_flags;
 119        dynid->id.manf_id = manf_id;
 120        dynid->id.card_id = card_id;
 121        dynid->id.func_id = func_id;
 122        dynid->id.function = function;
 123        dynid->id.device_no = device_no;
 124        memcpy(dynid->id.prod_id_hash, prod_id_hash, sizeof(__u32) * 4);
 125
 126        mutex_lock(&pdrv->dynids.lock);
 127        list_add_tail(&dynid->node, &pdrv->dynids.list);
 128        mutex_unlock(&pdrv->dynids.lock);
 129
 130        if (get_driver(&pdrv->drv)) {
 131                retval = driver_attach(&pdrv->drv);
 132                put_driver(&pdrv->drv);
 133        }
 134
 135        if (retval)
 136                return retval;
 137        return count;
 138}
 139static DRIVER_ATTR(new_id, S_IWUSR, NULL, pcmcia_store_new_id);
 140
 141static void
 142pcmcia_free_dynids(struct pcmcia_driver *drv)
 143{
 144        struct pcmcia_dynid *dynid, *n;
 145
 146        mutex_lock(&drv->dynids.lock);
 147        list_for_each_entry_safe(dynid, n, &drv->dynids.list, node) {
 148                list_del(&dynid->node);
 149                kfree(dynid);
 150        }
 151        mutex_unlock(&drv->dynids.lock);
 152}
 153
 154static int
 155pcmcia_create_newid_file(struct pcmcia_driver *drv)
 156{
 157        int error = 0;
 158        if (drv->probe != NULL)
 159                error = driver_create_file(&drv->drv, &driver_attr_new_id);
 160        return error;
 161}
 162
 163
 164/**
 165 * pcmcia_register_driver - register a PCMCIA driver with the bus core
 166 * @driver: the &driver being registered
 167 *
 168 * Registers a PCMCIA driver with the PCMCIA bus core.
 169 */
 170int pcmcia_register_driver(struct pcmcia_driver *driver)
 171{
 172        int error;
 173
 174        if (!driver)
 175                return -EINVAL;
 176
 177        pcmcia_check_driver(driver);
 178
 179        /* initialize common fields */
 180        driver->drv.bus = &pcmcia_bus_type;
 181        driver->drv.owner = driver->owner;
 182        driver->drv.name = driver->name;
 183        mutex_init(&driver->dynids.lock);
 184        INIT_LIST_HEAD(&driver->dynids.list);
 185
 186        pr_debug("registering driver %s\n", driver->name);
 187
 188        error = driver_register(&driver->drv);
 189        if (error < 0)
 190                return error;
 191
 192        error = pcmcia_create_newid_file(driver);
 193        if (error)
 194                driver_unregister(&driver->drv);
 195
 196        return error;
 197}
 198EXPORT_SYMBOL(pcmcia_register_driver);
 199
 200/**
 201 * pcmcia_unregister_driver - unregister a PCMCIA driver with the bus core
 202 * @driver: the &driver being unregistered
 203 */
 204void pcmcia_unregister_driver(struct pcmcia_driver *driver)
 205{
 206        pr_debug("unregistering driver %s\n", driver->name);
 207        driver_unregister(&driver->drv);
 208        pcmcia_free_dynids(driver);
 209}
 210EXPORT_SYMBOL(pcmcia_unregister_driver);
 211
 212
 213/* pcmcia_device handling */
 214
 215static struct pcmcia_device *pcmcia_get_dev(struct pcmcia_device *p_dev)
 216{
 217        struct device *tmp_dev;
 218        tmp_dev = get_device(&p_dev->dev);
 219        if (!tmp_dev)
 220                return NULL;
 221        return to_pcmcia_dev(tmp_dev);
 222}
 223
 224static void pcmcia_put_dev(struct pcmcia_device *p_dev)
 225{
 226        if (p_dev)
 227                put_device(&p_dev->dev);
 228}
 229
 230static void pcmcia_release_function(struct kref *ref)
 231{
 232        struct config_t *c = container_of(ref, struct config_t, ref);
 233        pr_debug("releasing config_t\n");
 234        kfree(c);
 235}
 236
 237static void pcmcia_release_dev(struct device *dev)
 238{
 239        struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 240        int i;
 241        dev_dbg(dev, "releasing device\n");
 242        pcmcia_put_socket(p_dev->socket);
 243        for (i = 0; i < 4; i++)
 244                kfree(p_dev->prod_id[i]);
 245        kfree(p_dev->devname);
 246        kref_put(&p_dev->function_config->ref, pcmcia_release_function);
 247        kfree(p_dev);
 248}
 249
 250
 251static int pcmcia_device_probe(struct device *dev)
 252{
 253        struct pcmcia_device *p_dev;
 254        struct pcmcia_driver *p_drv;
 255        struct pcmcia_socket *s;
 256        cistpl_config_t cis_config;
 257        int ret = 0;
 258
 259        dev = get_device(dev);
 260        if (!dev)
 261                return -ENODEV;
 262
 263        p_dev = to_pcmcia_dev(dev);
 264        p_drv = to_pcmcia_drv(dev->driver);
 265        s = p_dev->socket;
 266
 267        dev_dbg(dev, "trying to bind to %s\n", p_drv->name);
 268
 269        if ((!p_drv->probe) || (!p_dev->function_config) ||
 270            (!try_module_get(p_drv->owner))) {
 271                ret = -EINVAL;
 272                goto put_dev;
 273        }
 274
 275        /* set up some more device information */
 276        ret = pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_CONFIG,
 277                                &cis_config);
 278        if (!ret) {
 279                p_dev->config_base = cis_config.base;
 280                p_dev->config_regs = cis_config.rmask[0];
 281                dev_dbg(dev, "base %x, regs %x", p_dev->config_base,
 282                        p_dev->config_regs);
 283        } else {
 284                dev_printk(KERN_INFO, dev,
 285                           "pcmcia: could not parse base and rmask0 of CIS\n");
 286                p_dev->config_base = 0;
 287                p_dev->config_regs = 0;
 288        }
 289
 290        ret = p_drv->probe(p_dev);
 291        if (ret) {
 292                dev_dbg(dev, "binding to %s failed with %d\n",
 293                           p_drv->name, ret);
 294                goto put_module;
 295        }
 296        dev_dbg(dev, "%s bound: Vpp %d.%d, idx %x, IRQ %d", p_drv->name,
 297                p_dev->vpp/10, p_dev->vpp%10, p_dev->config_index, p_dev->irq);
 298        dev_dbg(dev, "resources: ioport %pR %pR iomem %pR %pR %pR",
 299                p_dev->resource[0], p_dev->resource[1], p_dev->resource[2],
 300                p_dev->resource[3], p_dev->resource[4]);
 301
 302        mutex_lock(&s->ops_mutex);
 303        if ((s->pcmcia_pfc) &&
 304            (p_dev->socket->device_count == 1) && (p_dev->device_no == 0))
 305                pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY);
 306        mutex_unlock(&s->ops_mutex);
 307
 308put_module:
 309        if (ret)
 310                module_put(p_drv->owner);
 311put_dev:
 312        if (ret)
 313                put_device(dev);
 314        return ret;
 315}
 316
 317
 318/*
 319 * Removes a PCMCIA card from the device tree and socket list.
 320 */
 321static void pcmcia_card_remove(struct pcmcia_socket *s, struct pcmcia_device *leftover)
 322{
 323        struct pcmcia_device    *p_dev;
 324        struct pcmcia_device    *tmp;
 325
 326        dev_dbg(leftover ? &leftover->dev : &s->dev,
 327                   "pcmcia_card_remove(%d) %s\n", s->sock,
 328                   leftover ? leftover->devname : "");
 329
 330        mutex_lock(&s->ops_mutex);
 331        if (!leftover)
 332                s->device_count = 0;
 333        else
 334                s->device_count = 1;
 335        mutex_unlock(&s->ops_mutex);
 336
 337        /* unregister all pcmcia_devices registered with this socket, except leftover */
 338        list_for_each_entry_safe(p_dev, tmp, &s->devices_list, socket_device_list) {
 339                if (p_dev == leftover)
 340                        continue;
 341
 342                mutex_lock(&s->ops_mutex);
 343                list_del(&p_dev->socket_device_list);
 344                mutex_unlock(&s->ops_mutex);
 345
 346                dev_dbg(&p_dev->dev, "unregistering device\n");
 347                device_unregister(&p_dev->dev);
 348        }
 349
 350        return;
 351}
 352
 353static int pcmcia_device_remove(struct device *dev)
 354{
 355        struct pcmcia_device *p_dev;
 356        struct pcmcia_driver *p_drv;
 357        int i;
 358
 359        p_dev = to_pcmcia_dev(dev);
 360        p_drv = to_pcmcia_drv(dev->driver);
 361
 362        dev_dbg(dev, "removing device\n");
 363
 364        /* If we're removing the primary module driving a
 365         * pseudo multi-function card, we need to unbind
 366         * all devices
 367         */
 368        if ((p_dev->socket->pcmcia_pfc) &&
 369            (p_dev->socket->device_count > 0) &&
 370            (p_dev->device_no == 0))
 371                pcmcia_card_remove(p_dev->socket, p_dev);
 372
 373        /* detach the "instance" */
 374        if (!p_drv)
 375                return 0;
 376
 377        if (p_drv->remove)
 378                p_drv->remove(p_dev);
 379
 380        /* check for proper unloading */
 381        if (p_dev->_irq || p_dev->_io || p_dev->_locked)
 382                dev_printk(KERN_INFO, dev,
 383                        "pcmcia: driver %s did not release config properly\n",
 384                        p_drv->name);
 385
 386        for (i = 0; i < MAX_WIN; i++)
 387                if (p_dev->_win & CLIENT_WIN_REQ(i))
 388                        dev_printk(KERN_INFO, dev,
 389                          "pcmcia: driver %s did not release window properly\n",
 390                           p_drv->name);
 391
 392        /* references from pcmcia_probe_device */
 393        pcmcia_put_dev(p_dev);
 394        module_put(p_drv->owner);
 395
 396        return 0;
 397}
 398
 399
 400/*
 401 * pcmcia_device_query -- determine information about a pcmcia device
 402 */
 403static int pcmcia_device_query(struct pcmcia_device *p_dev)
 404{
 405        cistpl_manfid_t manf_id;
 406        cistpl_funcid_t func_id;
 407        cistpl_vers_1_t *vers1;
 408        unsigned int i;
 409
 410        vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL);
 411        if (!vers1)
 412                return -ENOMEM;
 413
 414        if (!pccard_read_tuple(p_dev->socket, BIND_FN_ALL,
 415                               CISTPL_MANFID, &manf_id)) {
 416                mutex_lock(&p_dev->socket->ops_mutex);
 417                p_dev->manf_id = manf_id.manf;
 418                p_dev->card_id = manf_id.card;
 419                p_dev->has_manf_id = 1;
 420                p_dev->has_card_id = 1;
 421                mutex_unlock(&p_dev->socket->ops_mutex);
 422        }
 423
 424        if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 425                               CISTPL_FUNCID, &func_id)) {
 426                mutex_lock(&p_dev->socket->ops_mutex);
 427                p_dev->func_id = func_id.func;
 428                p_dev->has_func_id = 1;
 429                mutex_unlock(&p_dev->socket->ops_mutex);
 430        } else {
 431                /* rule of thumb: cards with no FUNCID, but with
 432                 * common memory device geometry information, are
 433                 * probably memory cards (from pcmcia-cs) */
 434                cistpl_device_geo_t *devgeo;
 435
 436                devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL);
 437                if (!devgeo) {
 438                        kfree(vers1);
 439                        return -ENOMEM;
 440                }
 441                if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 442                                      CISTPL_DEVICE_GEO, devgeo)) {
 443                        dev_dbg(&p_dev->dev,
 444                                   "mem device geometry probably means "
 445                                   "FUNCID_MEMORY\n");
 446                        mutex_lock(&p_dev->socket->ops_mutex);
 447                        p_dev->func_id = CISTPL_FUNCID_MEMORY;
 448                        p_dev->has_func_id = 1;
 449                        mutex_unlock(&p_dev->socket->ops_mutex);
 450                }
 451                kfree(devgeo);
 452        }
 453
 454        if (!pccard_read_tuple(p_dev->socket, BIND_FN_ALL, CISTPL_VERS_1,
 455                               vers1)) {
 456                mutex_lock(&p_dev->socket->ops_mutex);
 457                for (i = 0; i < min_t(unsigned int, 4, vers1->ns); i++) {
 458                        char *tmp;
 459                        unsigned int length;
 460                        char *new;
 461
 462                        tmp = vers1->str + vers1->ofs[i];
 463
 464                        length = strlen(tmp) + 1;
 465                        if ((length < 2) || (length > 255))
 466                                continue;
 467
 468                        new = kmalloc(sizeof(char) * length, GFP_KERNEL);
 469                        if (!new)
 470                                continue;
 471
 472                        new = strncpy(new, tmp, length);
 473
 474                        tmp = p_dev->prod_id[i];
 475                        p_dev->prod_id[i] = new;
 476                        kfree(tmp);
 477                }
 478                mutex_unlock(&p_dev->socket->ops_mutex);
 479        }
 480
 481        kfree(vers1);
 482        return 0;
 483}
 484
 485
 486static struct pcmcia_device *pcmcia_device_add(struct pcmcia_socket *s,
 487                                               unsigned int function)
 488{
 489        struct pcmcia_device *p_dev, *tmp_dev;
 490        int i;
 491
 492        s = pcmcia_get_socket(s);
 493        if (!s)
 494                return NULL;
 495
 496        pr_debug("adding device to %d, function %d\n", s->sock, function);
 497
 498        p_dev = kzalloc(sizeof(struct pcmcia_device), GFP_KERNEL);
 499        if (!p_dev)
 500                goto err_put;
 501
 502        mutex_lock(&s->ops_mutex);
 503        p_dev->device_no = (s->device_count++);
 504        mutex_unlock(&s->ops_mutex);
 505
 506        /* max of 2 PFC devices */
 507        if ((p_dev->device_no >= 2) && (function == 0))
 508                goto err_free;
 509
 510        /* max of 4 devices overall */
 511        if (p_dev->device_no >= 4)
 512                goto err_free;
 513
 514        p_dev->socket = s;
 515        p_dev->func   = function;
 516
 517        p_dev->dev.bus = &pcmcia_bus_type;
 518        p_dev->dev.parent = s->dev.parent;
 519        p_dev->dev.release = pcmcia_release_dev;
 520        /* by default don't allow DMA */
 521        p_dev->dma_mask = DMA_MASK_NONE;
 522        p_dev->dev.dma_mask = &p_dev->dma_mask;
 523        dev_set_name(&p_dev->dev, "%d.%d", p_dev->socket->sock, p_dev->device_no);
 524        if (!dev_name(&p_dev->dev))
 525                goto err_free;
 526        p_dev->devname = kasprintf(GFP_KERNEL, "pcmcia%s", dev_name(&p_dev->dev));
 527        if (!p_dev->devname)
 528                goto err_free;
 529        dev_dbg(&p_dev->dev, "devname is %s\n", p_dev->devname);
 530
 531        mutex_lock(&s->ops_mutex);
 532
 533        /*
 534         * p_dev->function_config must be the same for all card functions.
 535         * Note that this is serialized by ops_mutex, so that only one
 536         * such struct will be created.
 537         */
 538        list_for_each_entry(tmp_dev, &s->devices_list, socket_device_list)
 539                if (p_dev->func == tmp_dev->func) {
 540                        p_dev->function_config = tmp_dev->function_config;
 541                        p_dev->irq = tmp_dev->irq;
 542                        kref_get(&p_dev->function_config->ref);
 543                }
 544
 545        /* Add to the list in pcmcia_bus_socket */
 546        list_add(&p_dev->socket_device_list, &s->devices_list);
 547
 548        if (pcmcia_setup_irq(p_dev))
 549                dev_warn(&p_dev->dev,
 550                        "IRQ setup failed -- device might not work\n");
 551
 552        if (!p_dev->function_config) {
 553                config_t *c;
 554                dev_dbg(&p_dev->dev, "creating config_t\n");
 555                c = kzalloc(sizeof(struct config_t), GFP_KERNEL);
 556                if (!c) {
 557                        mutex_unlock(&s->ops_mutex);
 558                        goto err_unreg;
 559                }
 560                p_dev->function_config = c;
 561                kref_init(&c->ref);
 562                for (i = 0; i < MAX_IO_WIN; i++) {
 563                        c->io[i].name = p_dev->devname;
 564                        c->io[i].flags = IORESOURCE_IO;
 565                }
 566                for (i = 0; i< MAX_WIN; i++) {
 567                        c->mem[i].name = p_dev->devname;
 568                        c->mem[i].flags = IORESOURCE_MEM;
 569                }
 570        }
 571        for (i = 0; i < MAX_IO_WIN; i++)
 572                p_dev->resource[i] = &p_dev->function_config->io[i];
 573        for (; i < (MAX_IO_WIN + MAX_WIN); i++)
 574                p_dev->resource[i] = &p_dev->function_config->mem[i-MAX_IO_WIN];
 575
 576        mutex_unlock(&s->ops_mutex);
 577
 578        dev_printk(KERN_NOTICE, &p_dev->dev,
 579                   "pcmcia: registering new device %s (IRQ: %d)\n",
 580                   p_dev->devname, p_dev->irq);
 581
 582        pcmcia_device_query(p_dev);
 583
 584        if (device_register(&p_dev->dev))
 585                goto err_unreg;
 586
 587        return p_dev;
 588
 589 err_unreg:
 590        mutex_lock(&s->ops_mutex);
 591        list_del(&p_dev->socket_device_list);
 592        mutex_unlock(&s->ops_mutex);
 593
 594 err_free:
 595        mutex_lock(&s->ops_mutex);
 596        s->device_count--;
 597        mutex_unlock(&s->ops_mutex);
 598
 599        for (i = 0; i < 4; i++)
 600                kfree(p_dev->prod_id[i]);
 601        kfree(p_dev->devname);
 602        kfree(p_dev);
 603 err_put:
 604        pcmcia_put_socket(s);
 605
 606        return NULL;
 607}
 608
 609
 610static int pcmcia_card_add(struct pcmcia_socket *s)
 611{
 612        cistpl_longlink_mfc_t mfc;
 613        unsigned int no_funcs, i, no_chains;
 614        int ret = -EAGAIN;
 615
 616        mutex_lock(&s->ops_mutex);
 617        if (!(s->resource_setup_done)) {
 618                dev_dbg(&s->dev,
 619                           "no resources available, delaying card_add\n");
 620                mutex_unlock(&s->ops_mutex);
 621                return -EAGAIN; /* try again, but later... */
 622        }
 623
 624        if (pcmcia_validate_mem(s)) {
 625                dev_dbg(&s->dev, "validating mem resources failed, "
 626                       "delaying card_add\n");
 627                mutex_unlock(&s->ops_mutex);
 628                return -EAGAIN; /* try again, but later... */
 629        }
 630        mutex_unlock(&s->ops_mutex);
 631
 632        ret = pccard_validate_cis(s, &no_chains);
 633        if (ret || !no_chains) {
 634                dev_dbg(&s->dev, "invalid CIS or invalid resources\n");
 635                return -ENODEV;
 636        }
 637
 638        if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
 639                no_funcs = mfc.nfn;
 640        else
 641                no_funcs = 1;
 642        s->functions = no_funcs;
 643
 644        for (i = 0; i < no_funcs; i++)
 645                pcmcia_device_add(s, i);
 646
 647        return ret;
 648}
 649
 650
 651static int pcmcia_requery_callback(struct device *dev, void * _data)
 652{
 653        struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 654        if (!p_dev->dev.driver) {
 655                dev_dbg(dev, "update device information\n");
 656                pcmcia_device_query(p_dev);
 657        }
 658
 659        return 0;
 660}
 661
 662
 663static void pcmcia_requery(struct pcmcia_socket *s)
 664{
 665        int has_pfc;
 666
 667        if (s->functions == 0) {
 668                pcmcia_card_add(s);
 669                return;
 670        }
 671
 672        /* some device information might have changed because of a CIS
 673         * update or because we can finally read it correctly... so
 674         * determine it again, overwriting old values if necessary. */
 675        bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery_callback);
 676
 677        /* if the CIS changed, we need to check whether the number of
 678         * functions changed. */
 679        if (s->fake_cis) {
 680                int old_funcs, new_funcs;
 681                cistpl_longlink_mfc_t mfc;
 682
 683                /* does this cis override add or remove functions? */
 684                old_funcs = s->functions;
 685
 686                if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC,
 687                                        &mfc))
 688                        new_funcs = mfc.nfn;
 689                else
 690                        new_funcs = 1;
 691                if (old_funcs != new_funcs) {
 692                        /* we need to re-start */
 693                        pcmcia_card_remove(s, NULL);
 694                        s->functions = 0;
 695                        pcmcia_card_add(s);
 696                }
 697        }
 698
 699        /* If the PCMCIA device consists of two pseudo devices,
 700         * call pcmcia_device_add() -- which will fail if both
 701         * devices are already registered. */
 702        mutex_lock(&s->ops_mutex);
 703        has_pfc = s->pcmcia_pfc;
 704        mutex_unlock(&s->ops_mutex);
 705        if (has_pfc)
 706                pcmcia_device_add(s, 0);
 707
 708        /* we re-scan all devices, not just the ones connected to this
 709         * socket. This does not matter, though. */
 710        if (bus_rescan_devices(&pcmcia_bus_type))
 711                dev_warn(&s->dev, "rescanning the bus failed\n");
 712}
 713
 714
 715#ifdef CONFIG_PCMCIA_LOAD_CIS
 716
 717/**
 718 * pcmcia_load_firmware - load CIS from userspace if device-provided is broken
 719 * @dev: the pcmcia device which needs a CIS override
 720 * @filename: requested filename in /lib/firmware/
 721 *
 722 * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if
 723 * the one provided by the card is broken. The firmware files reside in
 724 * /lib/firmware/ in userspace.
 725 */
 726static int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
 727{
 728        struct pcmcia_socket *s = dev->socket;
 729        const struct firmware *fw;
 730        int ret = -ENOMEM;
 731        cistpl_longlink_mfc_t mfc;
 732        int old_funcs, new_funcs = 1;
 733
 734        if (!filename)
 735                return -EINVAL;
 736
 737        dev_dbg(&dev->dev, "trying to load CIS file %s\n", filename);
 738
 739        if (request_firmware(&fw, filename, &dev->dev) == 0) {
 740                if (fw->size >= CISTPL_MAX_CIS_SIZE) {
 741                        ret = -EINVAL;
 742                        dev_printk(KERN_ERR, &dev->dev,
 743                                   "pcmcia: CIS override is too big\n");
 744                        goto release;
 745                }
 746
 747                if (!pcmcia_replace_cis(s, fw->data, fw->size))
 748                        ret = 0;
 749                else {
 750                        dev_printk(KERN_ERR, &dev->dev,
 751                                   "pcmcia: CIS override failed\n");
 752                        goto release;
 753                }
 754
 755                /* we need to re-start if the number of functions changed */
 756                old_funcs = s->functions;
 757                if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC,
 758                                        &mfc))
 759                        new_funcs = mfc.nfn;
 760
 761                if (old_funcs != new_funcs)
 762                        ret = -EBUSY;
 763
 764                /* update information */
 765                pcmcia_device_query(dev);
 766
 767                /* requery (as number of functions might have changed) */
 768                pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY);
 769        }
 770 release:
 771        release_firmware(fw);
 772
 773        return ret;
 774}
 775
 776#else /* !CONFIG_PCMCIA_LOAD_CIS */
 777
 778static inline int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
 779{
 780        return -ENODEV;
 781}
 782
 783#endif
 784
 785
 786static inline int pcmcia_devmatch(struct pcmcia_device *dev,
 787                                  struct pcmcia_device_id *did)
 788{
 789        if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
 790                if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
 791                        return 0;
 792        }
 793
 794        if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
 795                if ((!dev->has_card_id) || (dev->card_id != did->card_id))
 796                        return 0;
 797        }
 798
 799        if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
 800                if (dev->func != did->function)
 801                        return 0;
 802        }
 803
 804        if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
 805                if (!dev->prod_id[0])
 806                        return 0;
 807                if (strcmp(did->prod_id[0], dev->prod_id[0]))
 808                        return 0;
 809        }
 810
 811        if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
 812                if (!dev->prod_id[1])
 813                        return 0;
 814                if (strcmp(did->prod_id[1], dev->prod_id[1]))
 815                        return 0;
 816        }
 817
 818        if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
 819                if (!dev->prod_id[2])
 820                        return 0;
 821                if (strcmp(did->prod_id[2], dev->prod_id[2]))
 822                        return 0;
 823        }
 824
 825        if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
 826                if (!dev->prod_id[3])
 827                        return 0;
 828                if (strcmp(did->prod_id[3], dev->prod_id[3]))
 829                        return 0;
 830        }
 831
 832        if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
 833                dev_dbg(&dev->dev, "this is a pseudo-multi-function device\n");
 834                mutex_lock(&dev->socket->ops_mutex);
 835                dev->socket->pcmcia_pfc = 1;
 836                mutex_unlock(&dev->socket->ops_mutex);
 837                if (dev->device_no != did->device_no)
 838                        return 0;
 839        }
 840
 841        if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
 842                int ret;
 843
 844                if ((!dev->has_func_id) || (dev->func_id != did->func_id))
 845                        return 0;
 846
 847                /* if this is a pseudo-multi-function device,
 848                 * we need explicit matches */
 849                if (dev->socket->pcmcia_pfc)
 850                        return 0;
 851                if (dev->device_no)
 852                        return 0;
 853
 854                /* also, FUNC_ID matching needs to be activated by userspace
 855                 * after it has re-checked that there is no possible module
 856                 * with a prod_id/manf_id/card_id match.
 857                 */
 858                mutex_lock(&dev->socket->ops_mutex);
 859                ret = dev->allow_func_id_match;
 860                mutex_unlock(&dev->socket->ops_mutex);
 861
 862                if (!ret) {
 863                        dev_dbg(&dev->dev,
 864                                "skipping FUNC_ID match until userspace ACK\n");
 865                        return 0;
 866                }
 867        }
 868
 869        if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
 870                dev_dbg(&dev->dev, "device needs a fake CIS\n");
 871                if (!dev->socket->fake_cis)
 872                        if (pcmcia_load_firmware(dev, did->cisfile))
 873                                return 0;
 874        }
 875
 876        if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
 877                int i;
 878                for (i = 0; i < 4; i++)
 879                        if (dev->prod_id[i])
 880                                return 0;
 881                if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
 882                        return 0;
 883        }
 884
 885        return 1;
 886}
 887
 888
 889static int pcmcia_bus_match(struct device *dev, struct device_driver *drv)
 890{
 891        struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 892        struct pcmcia_driver *p_drv = to_pcmcia_drv(drv);
 893        struct pcmcia_device_id *did = p_drv->id_table;
 894        struct pcmcia_dynid *dynid;
 895
 896        /* match dynamic devices first */
 897        mutex_lock(&p_drv->dynids.lock);
 898        list_for_each_entry(dynid, &p_drv->dynids.list, node) {
 899                dev_dbg(dev, "trying to match to %s\n", drv->name);
 900                if (pcmcia_devmatch(p_dev, &dynid->id)) {
 901                        dev_dbg(dev, "matched to %s\n", drv->name);
 902                        mutex_unlock(&p_drv->dynids.lock);
 903                        return 1;
 904                }
 905        }
 906        mutex_unlock(&p_drv->dynids.lock);
 907
 908        while (did && did->match_flags) {
 909                dev_dbg(dev, "trying to match to %s\n", drv->name);
 910                if (pcmcia_devmatch(p_dev, did)) {
 911                        dev_dbg(dev, "matched to %s\n", drv->name);
 912                        return 1;
 913                }
 914                did++;
 915        }
 916
 917        return 0;
 918}
 919
 920#ifdef CONFIG_HOTPLUG
 921
 922static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
 923{
 924        struct pcmcia_device *p_dev;
 925        int i;
 926        u32 hash[4] = { 0, 0, 0, 0};
 927
 928        if (!dev)
 929                return -ENODEV;
 930
 931        p_dev = to_pcmcia_dev(dev);
 932
 933        /* calculate hashes */
 934        for (i = 0; i < 4; i++) {
 935                if (!p_dev->prod_id[i])
 936                        continue;
 937                hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
 938        }
 939
 940        if (add_uevent_var(env, "SOCKET_NO=%u", p_dev->socket->sock))
 941                return -ENOMEM;
 942
 943        if (add_uevent_var(env, "DEVICE_NO=%02X", p_dev->device_no))
 944                return -ENOMEM;
 945
 946        if (add_uevent_var(env, "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
 947                           "pa%08Xpb%08Xpc%08Xpd%08X",
 948                           p_dev->has_manf_id ? p_dev->manf_id : 0,
 949                           p_dev->has_card_id ? p_dev->card_id : 0,
 950                           p_dev->has_func_id ? p_dev->func_id : 0,
 951                           p_dev->func,
 952                           p_dev->device_no,
 953                           hash[0],
 954                           hash[1],
 955                           hash[2],
 956                           hash[3]))
 957                return -ENOMEM;
 958
 959        return 0;
 960}
 961
 962#else
 963
 964static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
 965{
 966        return -ENODEV;
 967}
 968
 969#endif
 970
 971/************************ runtime PM support ***************************/
 972
 973static int pcmcia_dev_suspend(struct device *dev, pm_message_t state);
 974static int pcmcia_dev_resume(struct device *dev);
 975
 976static int runtime_suspend(struct device *dev)
 977{
 978        int rc;
 979
 980        device_lock(dev);
 981        rc = pcmcia_dev_suspend(dev, PMSG_SUSPEND);
 982        device_unlock(dev);
 983        return rc;
 984}
 985
 986static int runtime_resume(struct device *dev)
 987{
 988        int rc;
 989
 990        device_lock(dev);
 991        rc = pcmcia_dev_resume(dev);
 992        device_unlock(dev);
 993        return rc;
 994}
 995
 996/************************ per-device sysfs output ***************************/
 997
 998#define pcmcia_device_attr(field, test, format)                         \
 999static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf)              \
1000{                                                                       \
1001        struct pcmcia_device *p_dev = to_pcmcia_dev(dev);               \
1002        return p_dev->test ? sprintf(buf, format, p_dev->field) : -ENODEV; \
1003}
1004
1005#define pcmcia_device_stringattr(name, field)                                   \
1006static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf)               \
1007{                                                                       \
1008        struct pcmcia_device *p_dev = to_pcmcia_dev(dev);               \
1009        return p_dev->field ? sprintf(buf, "%s\n", p_dev->field) : -ENODEV; \
1010}
1011
1012pcmcia_device_attr(func, socket, "0x%02x\n");
1013pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
1014pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
1015pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
1016pcmcia_device_stringattr(prod_id1, prod_id[0]);
1017pcmcia_device_stringattr(prod_id2, prod_id[1]);
1018pcmcia_device_stringattr(prod_id3, prod_id[2]);
1019pcmcia_device_stringattr(prod_id4, prod_id[3]);
1020
1021static ssize_t pcmcia_show_resources(struct device *dev,
1022                                     struct device_attribute *attr, char *buf)
1023{
1024        struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1025        char *str = buf;
1026        int i;
1027
1028        for (i = 0; i < PCMCIA_NUM_RESOURCES; i++)
1029                str += sprintf(str, "%pr\n", p_dev->resource[i]);
1030
1031        return str - buf;
1032}
1033
1034static ssize_t pcmcia_show_pm_state(struct device *dev, struct device_attribute *attr, char *buf)
1035{
1036        struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1037
1038        if (p_dev->suspended)
1039                return sprintf(buf, "off\n");
1040        else
1041                return sprintf(buf, "on\n");
1042}
1043
1044static ssize_t pcmcia_store_pm_state(struct device *dev, struct device_attribute *attr,
1045                                     const char *buf, size_t count)
1046{
1047        struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1048        int ret = 0;
1049
1050        if (!count)
1051                return -EINVAL;
1052
1053        if ((!p_dev->suspended) && !strncmp(buf, "off", 3))
1054                ret = runtime_suspend(dev);
1055        else if (p_dev->suspended && !strncmp(buf, "on", 2))
1056                ret = runtime_resume(dev);
1057
1058        return ret ? ret : count;
1059}
1060
1061
1062static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1063{
1064        struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1065        int i;
1066        u32 hash[4] = { 0, 0, 0, 0};
1067
1068        /* calculate hashes */
1069        for (i = 0; i < 4; i++) {
1070                if (!p_dev->prod_id[i])
1071                        continue;
1072                hash[i] = crc32(0, p_dev->prod_id[i],
1073                                strlen(p_dev->prod_id[i]));
1074        }
1075        return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
1076                                "pa%08Xpb%08Xpc%08Xpd%08X\n",
1077                                p_dev->has_manf_id ? p_dev->manf_id : 0,
1078                                p_dev->has_card_id ? p_dev->card_id : 0,
1079                                p_dev->has_func_id ? p_dev->func_id : 0,
1080                                p_dev->func, p_dev->device_no,
1081                                hash[0], hash[1], hash[2], hash[3]);
1082}
1083
1084static ssize_t pcmcia_store_allow_func_id_match(struct device *dev,
1085                struct device_attribute *attr, const char *buf, size_t count)
1086{
1087        struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1088
1089        if (!count)
1090                return -EINVAL;
1091
1092        mutex_lock(&p_dev->socket->ops_mutex);
1093        p_dev->allow_func_id_match = 1;
1094        mutex_unlock(&p_dev->socket->ops_mutex);
1095        pcmcia_parse_uevents(p_dev->socket, PCMCIA_UEVENT_REQUERY);
1096
1097        return count;
1098}
1099
1100static struct device_attribute pcmcia_dev_attrs[] = {
1101        __ATTR(function, 0444, func_show, NULL),
1102        __ATTR(pm_state, 0644, pcmcia_show_pm_state, pcmcia_store_pm_state),
1103        __ATTR(resources, 0444, pcmcia_show_resources, NULL),
1104        __ATTR_RO(func_id),
1105        __ATTR_RO(manf_id),
1106        __ATTR_RO(card_id),
1107        __ATTR_RO(prod_id1),
1108        __ATTR_RO(prod_id2),
1109        __ATTR_RO(prod_id3),
1110        __ATTR_RO(prod_id4),
1111        __ATTR_RO(modalias),
1112        __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match),
1113        __ATTR_NULL,
1114};
1115
1116/* PM support, also needed for reset */
1117
1118static int pcmcia_dev_suspend(struct device *dev, pm_message_t state)
1119{
1120        struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1121        struct pcmcia_driver *p_drv = NULL;
1122        int ret = 0;
1123
1124        mutex_lock(&p_dev->socket->ops_mutex);
1125        if (p_dev->suspended) {
1126                mutex_unlock(&p_dev->socket->ops_mutex);
1127                return 0;
1128        }
1129        p_dev->suspended = 1;
1130        mutex_unlock(&p_dev->socket->ops_mutex);
1131
1132        dev_dbg(dev, "suspending\n");
1133
1134        if (dev->driver)
1135                p_drv = to_pcmcia_drv(dev->driver);
1136
1137        if (!p_drv)
1138                goto out;
1139
1140        if (p_drv->suspend) {
1141                ret = p_drv->suspend(p_dev);
1142                if (ret) {
1143                        dev_printk(KERN_ERR, dev,
1144                                   "pcmcia: device %s (driver %s) did "
1145                                   "not want to go to sleep (%d)\n",
1146                                   p_dev->devname, p_drv->name, ret);
1147                        mutex_lock(&p_dev->socket->ops_mutex);
1148                        p_dev->suspended = 0;
1149                        mutex_unlock(&p_dev->socket->ops_mutex);
1150                        goto out;
1151                }
1152        }
1153
1154        if (p_dev->device_no == p_dev->func) {
1155                dev_dbg(dev, "releasing configuration\n");
1156                pcmcia_release_configuration(p_dev);
1157        }
1158
1159 out:
1160        return ret;
1161}
1162
1163
1164static int pcmcia_dev_resume(struct device *dev)
1165{
1166        struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1167        struct pcmcia_driver *p_drv = NULL;
1168        int ret = 0;
1169
1170        mutex_lock(&p_dev->socket->ops_mutex);
1171        if (!p_dev->suspended) {
1172                mutex_unlock(&p_dev->socket->ops_mutex);
1173                return 0;
1174        }
1175        p_dev->suspended = 0;
1176        mutex_unlock(&p_dev->socket->ops_mutex);
1177
1178        dev_dbg(dev, "resuming\n");
1179
1180        if (dev->driver)
1181                p_drv = to_pcmcia_drv(dev->driver);
1182
1183        if (!p_drv)
1184                goto out;
1185
1186        if (p_dev->device_no == p_dev->func) {
1187                dev_dbg(dev, "requesting configuration\n");
1188                ret = pcmcia_enable_device(p_dev);
1189                if (ret)
1190                        goto out;
1191        }
1192
1193        if (p_drv->resume)
1194                ret = p_drv->resume(p_dev);
1195
1196 out:
1197        return ret;
1198}
1199
1200
1201static int pcmcia_bus_suspend_callback(struct device *dev, void * _data)
1202{
1203        struct pcmcia_socket *skt = _data;
1204        struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1205
1206        if (p_dev->socket != skt || p_dev->suspended)
1207                return 0;
1208
1209        return runtime_suspend(dev);
1210}
1211
1212static int pcmcia_bus_resume_callback(struct device *dev, void * _data)
1213{
1214        struct pcmcia_socket *skt = _data;
1215        struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1216
1217        if (p_dev->socket != skt || !p_dev->suspended)
1218                return 0;
1219
1220        runtime_resume(dev);
1221
1222        return 0;
1223}
1224
1225static int pcmcia_bus_resume(struct pcmcia_socket *skt)
1226{
1227        dev_dbg(&skt->dev, "resuming socket %d\n", skt->sock);
1228        bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback);
1229        return 0;
1230}
1231
1232static int pcmcia_bus_suspend(struct pcmcia_socket *skt)
1233{
1234        dev_dbg(&skt->dev, "suspending socket %d\n", skt->sock);
1235        if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt,
1236                             pcmcia_bus_suspend_callback)) {
1237                pcmcia_bus_resume(skt);
1238                return -EIO;
1239        }
1240        return 0;
1241}
1242
1243static int pcmcia_bus_remove(struct pcmcia_socket *skt)
1244{
1245        atomic_set(&skt->present, 0);
1246        pcmcia_card_remove(skt, NULL);
1247
1248        mutex_lock(&skt->ops_mutex);
1249        destroy_cis_cache(skt);
1250        pcmcia_cleanup_irq(skt);
1251        mutex_unlock(&skt->ops_mutex);
1252
1253        return 0;
1254}
1255
1256static int pcmcia_bus_add(struct pcmcia_socket *skt)
1257{
1258        atomic_set(&skt->present, 1);
1259
1260        mutex_lock(&skt->ops_mutex);
1261        skt->pcmcia_pfc = 0;
1262        destroy_cis_cache(skt); /* to be on the safe side... */
1263        mutex_unlock(&skt->ops_mutex);
1264
1265        pcmcia_card_add(skt);
1266
1267        return 0;
1268}
1269
1270static int pcmcia_bus_early_resume(struct pcmcia_socket *skt)
1271{
1272        if (!verify_cis_cache(skt)) {
1273                pcmcia_put_socket(skt);
1274                return 0;
1275        }
1276
1277        dev_dbg(&skt->dev, "cis mismatch - different card\n");
1278
1279        /* first, remove the card */
1280        pcmcia_bus_remove(skt);
1281
1282        mutex_lock(&skt->ops_mutex);
1283        destroy_cis_cache(skt);
1284        kfree(skt->fake_cis);
1285        skt->fake_cis = NULL;
1286        skt->functions = 0;
1287        mutex_unlock(&skt->ops_mutex);
1288
1289        /* now, add the new card */
1290        pcmcia_bus_add(skt);
1291        return 0;
1292}
1293
1294
1295/*
1296 * NOTE: This is racy. There's no guarantee the card will still be
1297 * physically present, even if the call to this function returns
1298 * non-NULL. Furthermore, the device driver most likely is unbound
1299 * almost immediately, so the timeframe where pcmcia_dev_present
1300 * returns NULL is probably really really small.
1301 */
1302struct pcmcia_device *pcmcia_dev_present(struct pcmcia_device *_p_dev)
1303{
1304        struct pcmcia_device *p_dev;
1305        struct pcmcia_device *ret = NULL;
1306
1307        p_dev = pcmcia_get_dev(_p_dev);
1308        if (!p_dev)
1309                return NULL;
1310
1311        if (atomic_read(&p_dev->socket->present) != 0)
1312                ret = p_dev;
1313
1314        pcmcia_put_dev(p_dev);
1315        return ret;
1316}
1317EXPORT_SYMBOL(pcmcia_dev_present);
1318
1319
1320static struct pcmcia_callback pcmcia_bus_callback = {
1321        .owner = THIS_MODULE,
1322        .add = pcmcia_bus_add,
1323        .remove = pcmcia_bus_remove,
1324        .requery = pcmcia_requery,
1325        .validate = pccard_validate_cis,
1326        .suspend = pcmcia_bus_suspend,
1327        .early_resume = pcmcia_bus_early_resume,
1328        .resume = pcmcia_bus_resume,
1329};
1330
1331static int __devinit pcmcia_bus_add_socket(struct device *dev,
1332                                           struct class_interface *class_intf)
1333{
1334        struct pcmcia_socket *socket = dev_get_drvdata(dev);
1335        int ret;
1336
1337        socket = pcmcia_get_socket(socket);
1338        if (!socket) {
1339                dev_printk(KERN_ERR, dev,
1340                           "PCMCIA obtaining reference to socket failed\n");
1341                return -ENODEV;
1342        }
1343
1344        ret = sysfs_create_bin_file(&dev->kobj, &pccard_cis_attr);
1345        if (ret) {
1346                dev_printk(KERN_ERR, dev, "PCMCIA registration failed\n");
1347                pcmcia_put_socket(socket);
1348                return ret;
1349        }
1350
1351        INIT_LIST_HEAD(&socket->devices_list);
1352        socket->pcmcia_pfc = 0;
1353        socket->device_count = 0;
1354        atomic_set(&socket->present, 0);
1355
1356        ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback);
1357        if (ret) {
1358                dev_printk(KERN_ERR, dev, "PCMCIA registration failed\n");
1359                pcmcia_put_socket(socket);
1360                return ret;
1361        }
1362
1363        return 0;
1364}
1365
1366static void pcmcia_bus_remove_socket(struct device *dev,
1367                                     struct class_interface *class_intf)
1368{
1369        struct pcmcia_socket *socket = dev_get_drvdata(dev);
1370
1371        if (!socket)
1372                return;
1373
1374        pccard_register_pcmcia(socket, NULL);
1375
1376        /* unregister any unbound devices */
1377        mutex_lock(&socket->skt_mutex);
1378        pcmcia_card_remove(socket, NULL);
1379        release_cis_mem(socket);
1380        mutex_unlock(&socket->skt_mutex);
1381
1382        sysfs_remove_bin_file(&dev->kobj, &pccard_cis_attr);
1383
1384        pcmcia_put_socket(socket);
1385
1386        return;
1387}
1388
1389
1390/* the pcmcia_bus_interface is used to handle pcmcia socket devices */
1391static struct class_interface pcmcia_bus_interface __refdata = {
1392        .class = &pcmcia_socket_class,
1393        .add_dev = &pcmcia_bus_add_socket,
1394        .remove_dev = &pcmcia_bus_remove_socket,
1395};
1396
1397
1398struct bus_type pcmcia_bus_type = {
1399        .name = "pcmcia",
1400        .uevent = pcmcia_bus_uevent,
1401        .match = pcmcia_bus_match,
1402        .dev_attrs = pcmcia_dev_attrs,
1403        .probe = pcmcia_device_probe,
1404        .remove = pcmcia_device_remove,
1405        .suspend = pcmcia_dev_suspend,
1406        .resume = pcmcia_dev_resume,
1407};
1408
1409
1410static int __init init_pcmcia_bus(void)
1411{
1412        int ret;
1413
1414        ret = bus_register(&pcmcia_bus_type);
1415        if (ret < 0) {
1416                printk(KERN_WARNING "pcmcia: bus_register error: %d\n", ret);
1417                return ret;
1418        }
1419        ret = class_interface_register(&pcmcia_bus_interface);
1420        if (ret < 0) {
1421                printk(KERN_WARNING
1422                        "pcmcia: class_interface_register error: %d\n", ret);
1423                bus_unregister(&pcmcia_bus_type);
1424                return ret;
1425        }
1426
1427        return 0;
1428}
1429fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that
1430                               * pcmcia_socket_class is already registered */
1431
1432
1433static void __exit exit_pcmcia_bus(void)
1434{
1435        class_interface_unregister(&pcmcia_bus_interface);
1436
1437        bus_unregister(&pcmcia_bus_type);
1438}
1439module_exit(exit_pcmcia_bus);
1440
1441
1442MODULE_ALIAS("ds");
1443