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 - 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        const 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        retval = driver_attach(&pdrv->drv);
 131
 132        if (retval)
 133                return retval;
 134        return count;
 135}
 136static DRIVER_ATTR(new_id, S_IWUSR, NULL, pcmcia_store_new_id);
 137
 138static void
 139pcmcia_free_dynids(struct pcmcia_driver *drv)
 140{
 141        struct pcmcia_dynid *dynid, *n;
 142
 143        mutex_lock(&drv->dynids.lock);
 144        list_for_each_entry_safe(dynid, n, &drv->dynids.list, node) {
 145                list_del(&dynid->node);
 146                kfree(dynid);
 147        }
 148        mutex_unlock(&drv->dynids.lock);
 149}
 150
 151static int
 152pcmcia_create_newid_file(struct pcmcia_driver *drv)
 153{
 154        int error = 0;
 155        if (drv->probe != NULL)
 156                error = driver_create_file(&drv->drv, &driver_attr_new_id);
 157        return error;
 158}
 159
 160static void
 161pcmcia_remove_newid_file(struct pcmcia_driver *drv)
 162{
 163        driver_remove_file(&drv->drv, &driver_attr_new_id);
 164}
 165
 166/**
 167 * pcmcia_register_driver - register a PCMCIA driver with the bus core
 168 * @driver: the &driver being registered
 169 *
 170 * Registers a PCMCIA driver with the PCMCIA bus core.
 171 */
 172int pcmcia_register_driver(struct pcmcia_driver *driver)
 173{
 174        int error;
 175
 176        if (!driver)
 177                return -EINVAL;
 178
 179        pcmcia_check_driver(driver);
 180
 181        /* initialize common fields */
 182        driver->drv.bus = &pcmcia_bus_type;
 183        driver->drv.owner = driver->owner;
 184        driver->drv.name = driver->name;
 185        mutex_init(&driver->dynids.lock);
 186        INIT_LIST_HEAD(&driver->dynids.list);
 187
 188        pr_debug("registering driver %s\n", driver->name);
 189
 190        error = driver_register(&driver->drv);
 191        if (error < 0)
 192                return error;
 193
 194        error = pcmcia_create_newid_file(driver);
 195        if (error)
 196                driver_unregister(&driver->drv);
 197
 198        return error;
 199}
 200EXPORT_SYMBOL(pcmcia_register_driver);
 201
 202/**
 203 * pcmcia_unregister_driver - unregister a PCMCIA driver with the bus core
 204 * @driver: the &driver being unregistered
 205 */
 206void pcmcia_unregister_driver(struct pcmcia_driver *driver)
 207{
 208        pr_debug("unregistering driver %s\n", driver->name);
 209        pcmcia_remove_newid_file(driver);
 210        driver_unregister(&driver->drv);
 211        pcmcia_free_dynids(driver);
 212}
 213EXPORT_SYMBOL(pcmcia_unregister_driver);
 214
 215
 216/* pcmcia_device handling */
 217
 218static struct pcmcia_device *pcmcia_get_dev(struct pcmcia_device *p_dev)
 219{
 220        struct device *tmp_dev;
 221        tmp_dev = get_device(&p_dev->dev);
 222        if (!tmp_dev)
 223                return NULL;
 224        return to_pcmcia_dev(tmp_dev);
 225}
 226
 227static void pcmcia_put_dev(struct pcmcia_device *p_dev)
 228{
 229        if (p_dev)
 230                put_device(&p_dev->dev);
 231}
 232
 233static void pcmcia_release_function(struct kref *ref)
 234{
 235        struct config_t *c = container_of(ref, struct config_t, ref);
 236        pr_debug("releasing config_t\n");
 237        kfree(c);
 238}
 239
 240static void pcmcia_release_dev(struct device *dev)
 241{
 242        struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 243        int i;
 244        dev_dbg(dev, "releasing device\n");
 245        pcmcia_put_socket(p_dev->socket);
 246        for (i = 0; i < 4; i++)
 247                kfree(p_dev->prod_id[i]);
 248        kfree(p_dev->devname);
 249        kref_put(&p_dev->function_config->ref, pcmcia_release_function);
 250        kfree(p_dev);
 251}
 252
 253
 254static int pcmcia_device_probe(struct device *dev)
 255{
 256        struct pcmcia_device *p_dev;
 257        struct pcmcia_driver *p_drv;
 258        struct pcmcia_socket *s;
 259        cistpl_config_t cis_config;
 260        int ret = 0;
 261
 262        dev = get_device(dev);
 263        if (!dev)
 264                return -ENODEV;
 265
 266        p_dev = to_pcmcia_dev(dev);
 267        p_drv = to_pcmcia_drv(dev->driver);
 268        s = p_dev->socket;
 269
 270        dev_dbg(dev, "trying to bind to %s\n", p_drv->name);
 271
 272        if ((!p_drv->probe) || (!p_dev->function_config) ||
 273            (!try_module_get(p_drv->owner))) {
 274                ret = -EINVAL;
 275                goto put_dev;
 276        }
 277
 278        /* set up some more device information */
 279        ret = pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_CONFIG,
 280                                &cis_config);
 281        if (!ret) {
 282                p_dev->config_base = cis_config.base;
 283                p_dev->config_regs = cis_config.rmask[0];
 284                dev_dbg(dev, "base %x, regs %x", p_dev->config_base,
 285                        p_dev->config_regs);
 286        } else {
 287                dev_printk(KERN_INFO, dev,
 288                           "pcmcia: could not parse base and rmask0 of CIS\n");
 289                p_dev->config_base = 0;
 290                p_dev->config_regs = 0;
 291        }
 292
 293        ret = p_drv->probe(p_dev);
 294        if (ret) {
 295                dev_dbg(dev, "binding to %s failed with %d\n",
 296                           p_drv->name, ret);
 297                goto put_module;
 298        }
 299        dev_dbg(dev, "%s bound: Vpp %d.%d, idx %x, IRQ %d", p_drv->name,
 300                p_dev->vpp/10, p_dev->vpp%10, p_dev->config_index, p_dev->irq);
 301        dev_dbg(dev, "resources: ioport %pR %pR iomem %pR %pR %pR",
 302                p_dev->resource[0], p_dev->resource[1], p_dev->resource[2],
 303                p_dev->resource[3], p_dev->resource[4]);
 304
 305        mutex_lock(&s->ops_mutex);
 306        if ((s->pcmcia_pfc) &&
 307            (p_dev->socket->device_count == 1) && (p_dev->device_no == 0))
 308                pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY);
 309        mutex_unlock(&s->ops_mutex);
 310
 311put_module:
 312        if (ret)
 313                module_put(p_drv->owner);
 314put_dev:
 315        if (ret)
 316                put_device(dev);
 317        return ret;
 318}
 319
 320
 321/*
 322 * Removes a PCMCIA card from the device tree and socket list.
 323 */
 324static void pcmcia_card_remove(struct pcmcia_socket *s, struct pcmcia_device *leftover)
 325{
 326        struct pcmcia_device    *p_dev;
 327        struct pcmcia_device    *tmp;
 328
 329        dev_dbg(leftover ? &leftover->dev : &s->dev,
 330                   "pcmcia_card_remove(%d) %s\n", s->sock,
 331                   leftover ? leftover->devname : "");
 332
 333        mutex_lock(&s->ops_mutex);
 334        if (!leftover)
 335                s->device_count = 0;
 336        else
 337                s->device_count = 1;
 338        mutex_unlock(&s->ops_mutex);
 339
 340        /* unregister all pcmcia_devices registered with this socket, except leftover */
 341        list_for_each_entry_safe(p_dev, tmp, &s->devices_list, socket_device_list) {
 342                if (p_dev == leftover)
 343                        continue;
 344
 345                mutex_lock(&s->ops_mutex);
 346                list_del(&p_dev->socket_device_list);
 347                mutex_unlock(&s->ops_mutex);
 348
 349                dev_dbg(&p_dev->dev, "unregistering device\n");
 350                device_unregister(&p_dev->dev);
 351        }
 352
 353        return;
 354}
 355
 356static int pcmcia_device_remove(struct device *dev)
 357{
 358        struct pcmcia_device *p_dev;
 359        struct pcmcia_driver *p_drv;
 360        int i;
 361
 362        p_dev = to_pcmcia_dev(dev);
 363        p_drv = to_pcmcia_drv(dev->driver);
 364
 365        dev_dbg(dev, "removing device\n");
 366
 367        /* If we're removing the primary module driving a
 368         * pseudo multi-function card, we need to unbind
 369         * all devices
 370         */
 371        if ((p_dev->socket->pcmcia_pfc) &&
 372            (p_dev->socket->device_count > 0) &&
 373            (p_dev->device_no == 0))
 374                pcmcia_card_remove(p_dev->socket, p_dev);
 375
 376        /* detach the "instance" */
 377        if (!p_drv)
 378                return 0;
 379
 380        if (p_drv->remove)
 381                p_drv->remove(p_dev);
 382
 383        /* check for proper unloading */
 384        if (p_dev->_irq || p_dev->_io || p_dev->_locked)
 385                dev_printk(KERN_INFO, dev,
 386                        "pcmcia: driver %s did not release config properly\n",
 387                        p_drv->name);
 388
 389        for (i = 0; i < MAX_WIN; i++)
 390                if (p_dev->_win & CLIENT_WIN_REQ(i))
 391                        dev_printk(KERN_INFO, dev,
 392                          "pcmcia: driver %s did not release window properly\n",
 393                           p_drv->name);
 394
 395        /* references from pcmcia_probe_device */
 396        pcmcia_put_dev(p_dev);
 397        module_put(p_drv->owner);
 398
 399        return 0;
 400}
 401
 402
 403/*
 404 * pcmcia_device_query -- determine information about a pcmcia device
 405 */
 406static int pcmcia_device_query(struct pcmcia_device *p_dev)
 407{
 408        cistpl_manfid_t manf_id;
 409        cistpl_funcid_t func_id;
 410        cistpl_vers_1_t *vers1;
 411        unsigned int i;
 412
 413        vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL);
 414        if (!vers1)
 415                return -ENOMEM;
 416
 417        if (!pccard_read_tuple(p_dev->socket, BIND_FN_ALL,
 418                               CISTPL_MANFID, &manf_id)) {
 419                mutex_lock(&p_dev->socket->ops_mutex);
 420                p_dev->manf_id = manf_id.manf;
 421                p_dev->card_id = manf_id.card;
 422                p_dev->has_manf_id = 1;
 423                p_dev->has_card_id = 1;
 424                mutex_unlock(&p_dev->socket->ops_mutex);
 425        }
 426
 427        if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 428                               CISTPL_FUNCID, &func_id)) {
 429                mutex_lock(&p_dev->socket->ops_mutex);
 430                p_dev->func_id = func_id.func;
 431                p_dev->has_func_id = 1;
 432                mutex_unlock(&p_dev->socket->ops_mutex);
 433        } else {
 434                /* rule of thumb: cards with no FUNCID, but with
 435                 * common memory device geometry information, are
 436                 * probably memory cards (from pcmcia-cs) */
 437                cistpl_device_geo_t *devgeo;
 438
 439                devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL);
 440                if (!devgeo) {
 441                        kfree(vers1);
 442                        return -ENOMEM;
 443                }
 444                if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 445                                      CISTPL_DEVICE_GEO, devgeo)) {
 446                        dev_dbg(&p_dev->dev,
 447                                   "mem device geometry probably means "
 448                                   "FUNCID_MEMORY\n");
 449                        mutex_lock(&p_dev->socket->ops_mutex);
 450                        p_dev->func_id = CISTPL_FUNCID_MEMORY;
 451                        p_dev->has_func_id = 1;
 452                        mutex_unlock(&p_dev->socket->ops_mutex);
 453                }
 454                kfree(devgeo);
 455        }
 456
 457        if (!pccard_read_tuple(p_dev->socket, BIND_FN_ALL, CISTPL_VERS_1,
 458                               vers1)) {
 459                mutex_lock(&p_dev->socket->ops_mutex);
 460                for (i = 0; i < min_t(unsigned int, 4, vers1->ns); i++) {
 461                        char *tmp;
 462                        unsigned int length;
 463                        char *new;
 464
 465                        tmp = vers1->str + vers1->ofs[i];
 466
 467                        length = strlen(tmp) + 1;
 468                        if ((length < 2) || (length > 255))
 469                                continue;
 470
 471                        new = kmalloc(sizeof(char) * length, GFP_KERNEL);
 472                        if (!new)
 473                                continue;
 474
 475                        new = strncpy(new, tmp, length);
 476
 477                        tmp = p_dev->prod_id[i];
 478                        p_dev->prod_id[i] = new;
 479                        kfree(tmp);
 480                }
 481                mutex_unlock(&p_dev->socket->ops_mutex);
 482        }
 483
 484        kfree(vers1);
 485        return 0;
 486}
 487
 488
 489static struct pcmcia_device *pcmcia_device_add(struct pcmcia_socket *s,
 490                                               unsigned int function)
 491{
 492        struct pcmcia_device *p_dev, *tmp_dev;
 493        int i;
 494
 495        s = pcmcia_get_socket(s);
 496        if (!s)
 497                return NULL;
 498
 499        pr_debug("adding device to %d, function %d\n", s->sock, function);
 500
 501        p_dev = kzalloc(sizeof(struct pcmcia_device), GFP_KERNEL);
 502        if (!p_dev)
 503                goto err_put;
 504
 505        mutex_lock(&s->ops_mutex);
 506        p_dev->device_no = (s->device_count++);
 507        mutex_unlock(&s->ops_mutex);
 508
 509        /* max of 2 PFC devices */
 510        if ((p_dev->device_no >= 2) && (function == 0))
 511                goto err_free;
 512
 513        /* max of 4 devices overall */
 514        if (p_dev->device_no >= 4)
 515                goto err_free;
 516
 517        p_dev->socket = s;
 518        p_dev->func   = function;
 519
 520        p_dev->dev.bus = &pcmcia_bus_type;
 521        p_dev->dev.parent = s->dev.parent;
 522        p_dev->dev.release = pcmcia_release_dev;
 523        /* by default don't allow DMA */
 524        p_dev->dma_mask = DMA_MASK_NONE;
 525        p_dev->dev.dma_mask = &p_dev->dma_mask;
 526        dev_set_name(&p_dev->dev, "%d.%d", p_dev->socket->sock, p_dev->device_no);
 527        if (!dev_name(&p_dev->dev))
 528                goto err_free;
 529        p_dev->devname = kasprintf(GFP_KERNEL, "pcmcia%s", dev_name(&p_dev->dev));
 530        if (!p_dev->devname)
 531                goto err_free;
 532        dev_dbg(&p_dev->dev, "devname is %s\n", p_dev->devname);
 533
 534        mutex_lock(&s->ops_mutex);
 535
 536        /*
 537         * p_dev->function_config must be the same for all card functions.
 538         * Note that this is serialized by ops_mutex, so that only one
 539         * such struct will be created.
 540         */
 541        list_for_each_entry(tmp_dev, &s->devices_list, socket_device_list)
 542                if (p_dev->func == tmp_dev->func) {
 543                        p_dev->function_config = tmp_dev->function_config;
 544                        p_dev->irq = tmp_dev->irq;
 545                        kref_get(&p_dev->function_config->ref);
 546                }
 547
 548        /* Add to the list in pcmcia_bus_socket */
 549        list_add(&p_dev->socket_device_list, &s->devices_list);
 550
 551        if (pcmcia_setup_irq(p_dev))
 552                dev_warn(&p_dev->dev,
 553                        "IRQ setup failed -- device might not work\n");
 554
 555        if (!p_dev->function_config) {
 556                config_t *c;
 557                dev_dbg(&p_dev->dev, "creating config_t\n");
 558                c = kzalloc(sizeof(struct config_t), GFP_KERNEL);
 559                if (!c) {
 560                        mutex_unlock(&s->ops_mutex);
 561                        goto err_unreg;
 562                }
 563                p_dev->function_config = c;
 564                kref_init(&c->ref);
 565                for (i = 0; i < MAX_IO_WIN; i++) {
 566                        c->io[i].name = p_dev->devname;
 567                        c->io[i].flags = IORESOURCE_IO;
 568                }
 569                for (i = 0; i< MAX_WIN; i++) {
 570                        c->mem[i].name = p_dev->devname;
 571                        c->mem[i].flags = IORESOURCE_MEM;
 572                }
 573        }
 574        for (i = 0; i < MAX_IO_WIN; i++)
 575                p_dev->resource[i] = &p_dev->function_config->io[i];
 576        for (; i < (MAX_IO_WIN + MAX_WIN); i++)
 577                p_dev->resource[i] = &p_dev->function_config->mem[i-MAX_IO_WIN];
 578
 579        mutex_unlock(&s->ops_mutex);
 580
 581        dev_printk(KERN_NOTICE, &p_dev->dev,
 582                   "pcmcia: registering new device %s (IRQ: %d)\n",
 583                   p_dev->devname, p_dev->irq);
 584
 585        pcmcia_device_query(p_dev);
 586
 587        if (device_register(&p_dev->dev))
 588                goto err_unreg;
 589
 590        return p_dev;
 591
 592 err_unreg:
 593        mutex_lock(&s->ops_mutex);
 594        list_del(&p_dev->socket_device_list);
 595        mutex_unlock(&s->ops_mutex);
 596
 597 err_free:
 598        mutex_lock(&s->ops_mutex);
 599        s->device_count--;
 600        mutex_unlock(&s->ops_mutex);
 601
 602        for (i = 0; i < 4; i++)
 603                kfree(p_dev->prod_id[i]);
 604        kfree(p_dev->devname);
 605        kfree(p_dev);
 606 err_put:
 607        pcmcia_put_socket(s);
 608
 609        return NULL;
 610}
 611
 612
 613static int pcmcia_card_add(struct pcmcia_socket *s)
 614{
 615        cistpl_longlink_mfc_t mfc;
 616        unsigned int no_funcs, i, no_chains;
 617        int ret = -EAGAIN;
 618
 619        mutex_lock(&s->ops_mutex);
 620        if (!(s->resource_setup_done)) {
 621                dev_dbg(&s->dev,
 622                           "no resources available, delaying card_add\n");
 623                mutex_unlock(&s->ops_mutex);
 624                return -EAGAIN; /* try again, but later... */
 625        }
 626
 627        if (pcmcia_validate_mem(s)) {
 628                dev_dbg(&s->dev, "validating mem resources failed, "
 629                       "delaying card_add\n");
 630                mutex_unlock(&s->ops_mutex);
 631                return -EAGAIN; /* try again, but later... */
 632        }
 633        mutex_unlock(&s->ops_mutex);
 634
 635        ret = pccard_validate_cis(s, &no_chains);
 636        if (ret || !no_chains) {
 637                dev_dbg(&s->dev, "invalid CIS or invalid resources\n");
 638                return -ENODEV;
 639        }
 640
 641        if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
 642                no_funcs = mfc.nfn;
 643        else
 644                no_funcs = 1;
 645        s->functions = no_funcs;
 646
 647        for (i = 0; i < no_funcs; i++)
 648                pcmcia_device_add(s, i);
 649
 650        return ret;
 651}
 652
 653
 654static int pcmcia_requery_callback(struct device *dev, void * _data)
 655{
 656        struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 657        if (!p_dev->dev.driver) {
 658                dev_dbg(dev, "update device information\n");
 659                pcmcia_device_query(p_dev);
 660        }
 661
 662        return 0;
 663}
 664
 665
 666static void pcmcia_requery(struct pcmcia_socket *s)
 667{
 668        int has_pfc;
 669
 670        if (!(s->state & SOCKET_PRESENT))
 671                return;
 672
 673        if (s->functions == 0) {
 674                pcmcia_card_add(s);
 675                return;
 676        }
 677
 678        /* some device information might have changed because of a CIS
 679         * update or because we can finally read it correctly... so
 680         * determine it again, overwriting old values if necessary. */
 681        bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery_callback);
 682
 683        /* if the CIS changed, we need to check whether the number of
 684         * functions changed. */
 685        if (s->fake_cis) {
 686                int old_funcs, new_funcs;
 687                cistpl_longlink_mfc_t mfc;
 688
 689                /* does this cis override add or remove functions? */
 690                old_funcs = s->functions;
 691
 692                if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC,
 693                                        &mfc))
 694                        new_funcs = mfc.nfn;
 695                else
 696                        new_funcs = 1;
 697                if (old_funcs != new_funcs) {
 698                        /* we need to re-start */
 699                        pcmcia_card_remove(s, NULL);
 700                        s->functions = 0;
 701                        pcmcia_card_add(s);
 702                }
 703        }
 704
 705        /* If the PCMCIA device consists of two pseudo devices,
 706         * call pcmcia_device_add() -- which will fail if both
 707         * devices are already registered. */
 708        mutex_lock(&s->ops_mutex);
 709        has_pfc = s->pcmcia_pfc;
 710        mutex_unlock(&s->ops_mutex);
 711        if (has_pfc)
 712                pcmcia_device_add(s, 0);
 713
 714        /* we re-scan all devices, not just the ones connected to this
 715         * socket. This does not matter, though. */
 716        if (bus_rescan_devices(&pcmcia_bus_type))
 717                dev_warn(&s->dev, "rescanning the bus failed\n");
 718}
 719
 720
 721#ifdef CONFIG_PCMCIA_LOAD_CIS
 722
 723/**
 724 * pcmcia_load_firmware - load CIS from userspace if device-provided is broken
 725 * @dev: the pcmcia device which needs a CIS override
 726 * @filename: requested filename in /lib/firmware/
 727 *
 728 * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if
 729 * the one provided by the card is broken. The firmware files reside in
 730 * /lib/firmware/ in userspace.
 731 */
 732static int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
 733{
 734        struct pcmcia_socket *s = dev->socket;
 735        const struct firmware *fw;
 736        int ret = -ENOMEM;
 737        cistpl_longlink_mfc_t mfc;
 738        int old_funcs, new_funcs = 1;
 739
 740        if (!filename)
 741                return -EINVAL;
 742
 743        dev_dbg(&dev->dev, "trying to load CIS file %s\n", filename);
 744
 745        if (request_firmware(&fw, filename, &dev->dev) == 0) {
 746                if (fw->size >= CISTPL_MAX_CIS_SIZE) {
 747                        ret = -EINVAL;
 748                        dev_printk(KERN_ERR, &dev->dev,
 749                                   "pcmcia: CIS override is too big\n");
 750                        goto release;
 751                }
 752
 753                if (!pcmcia_replace_cis(s, fw->data, fw->size))
 754                        ret = 0;
 755                else {
 756                        dev_printk(KERN_ERR, &dev->dev,
 757                                   "pcmcia: CIS override failed\n");
 758                        goto release;
 759                }
 760
 761                /* we need to re-start if the number of functions changed */
 762                old_funcs = s->functions;
 763                if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC,
 764                                        &mfc))
 765                        new_funcs = mfc.nfn;
 766
 767                if (old_funcs != new_funcs)
 768                        ret = -EBUSY;
 769
 770                /* update information */
 771                pcmcia_device_query(dev);
 772
 773                /* requery (as number of functions might have changed) */
 774                pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY);
 775        }
 776 release:
 777        release_firmware(fw);
 778
 779        return ret;
 780}
 781
 782#else /* !CONFIG_PCMCIA_LOAD_CIS */
 783
 784static inline int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
 785{
 786        return -ENODEV;
 787}
 788
 789#endif
 790
 791
 792static inline int pcmcia_devmatch(struct pcmcia_device *dev,
 793                                  const struct pcmcia_device_id *did)
 794{
 795        if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
 796                if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
 797                        return 0;
 798        }
 799
 800        if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
 801                if ((!dev->has_card_id) || (dev->card_id != did->card_id))
 802                        return 0;
 803        }
 804
 805        if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
 806                if (dev->func != did->function)
 807                        return 0;
 808        }
 809
 810        if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
 811                if (!dev->prod_id[0])
 812                        return 0;
 813                if (strcmp(did->prod_id[0], dev->prod_id[0]))
 814                        return 0;
 815        }
 816
 817        if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
 818                if (!dev->prod_id[1])
 819                        return 0;
 820                if (strcmp(did->prod_id[1], dev->prod_id[1]))
 821                        return 0;
 822        }
 823
 824        if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
 825                if (!dev->prod_id[2])
 826                        return 0;
 827                if (strcmp(did->prod_id[2], dev->prod_id[2]))
 828                        return 0;
 829        }
 830
 831        if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
 832                if (!dev->prod_id[3])
 833                        return 0;
 834                if (strcmp(did->prod_id[3], dev->prod_id[3]))
 835                        return 0;
 836        }
 837
 838        if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
 839                dev_dbg(&dev->dev, "this is a pseudo-multi-function device\n");
 840                mutex_lock(&dev->socket->ops_mutex);
 841                dev->socket->pcmcia_pfc = 1;
 842                mutex_unlock(&dev->socket->ops_mutex);
 843                if (dev->device_no != did->device_no)
 844                        return 0;
 845        }
 846
 847        if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
 848                int ret;
 849
 850                if ((!dev->has_func_id) || (dev->func_id != did->func_id))
 851                        return 0;
 852
 853                /* if this is a pseudo-multi-function device,
 854                 * we need explicit matches */
 855                if (dev->socket->pcmcia_pfc)
 856                        return 0;
 857                if (dev->device_no)
 858                        return 0;
 859
 860                /* also, FUNC_ID matching needs to be activated by userspace
 861                 * after it has re-checked that there is no possible module
 862                 * with a prod_id/manf_id/card_id match.
 863                 */
 864                mutex_lock(&dev->socket->ops_mutex);
 865                ret = dev->allow_func_id_match;
 866                mutex_unlock(&dev->socket->ops_mutex);
 867
 868                if (!ret) {
 869                        dev_dbg(&dev->dev,
 870                                "skipping FUNC_ID match until userspace ACK\n");
 871                        return 0;
 872                }
 873        }
 874
 875        if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
 876                dev_dbg(&dev->dev, "device needs a fake CIS\n");
 877                if (!dev->socket->fake_cis)
 878                        if (pcmcia_load_firmware(dev, did->cisfile))
 879                                return 0;
 880        }
 881
 882        if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
 883                int i;
 884                for (i = 0; i < 4; i++)
 885                        if (dev->prod_id[i])
 886                                return 0;
 887                if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
 888                        return 0;
 889        }
 890
 891        return 1;
 892}
 893
 894
 895static int pcmcia_bus_match(struct device *dev, struct device_driver *drv)
 896{
 897        struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 898        struct pcmcia_driver *p_drv = to_pcmcia_drv(drv);
 899        const struct pcmcia_device_id *did = p_drv->id_table;
 900        struct pcmcia_dynid *dynid;
 901
 902        /* match dynamic devices first */
 903        mutex_lock(&p_drv->dynids.lock);
 904        list_for_each_entry(dynid, &p_drv->dynids.list, node) {
 905                dev_dbg(dev, "trying to match to %s\n", drv->name);
 906                if (pcmcia_devmatch(p_dev, &dynid->id)) {
 907                        dev_dbg(dev, "matched to %s\n", drv->name);
 908                        mutex_unlock(&p_drv->dynids.lock);
 909                        return 1;
 910                }
 911        }
 912        mutex_unlock(&p_drv->dynids.lock);
 913
 914        while (did && did->match_flags) {
 915                dev_dbg(dev, "trying to match to %s\n", drv->name);
 916                if (pcmcia_devmatch(p_dev, did)) {
 917                        dev_dbg(dev, "matched to %s\n", drv->name);
 918                        return 1;
 919                }
 920                did++;
 921        }
 922
 923        return 0;
 924}
 925
 926static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
 927{
 928        struct pcmcia_device *p_dev;
 929        int i;
 930        u32 hash[4] = { 0, 0, 0, 0};
 931
 932        if (!dev)
 933                return -ENODEV;
 934
 935        p_dev = to_pcmcia_dev(dev);
 936
 937        /* calculate hashes */
 938        for (i = 0; i < 4; i++) {
 939                if (!p_dev->prod_id[i])
 940                        continue;
 941                hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
 942        }
 943
 944        if (add_uevent_var(env, "SOCKET_NO=%u", p_dev->socket->sock))
 945                return -ENOMEM;
 946
 947        if (add_uevent_var(env, "DEVICE_NO=%02X", p_dev->device_no))
 948                return -ENOMEM;
 949
 950        if (add_uevent_var(env, "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
 951                           "pa%08Xpb%08Xpc%08Xpd%08X",
 952                           p_dev->has_manf_id ? p_dev->manf_id : 0,
 953                           p_dev->has_card_id ? p_dev->card_id : 0,
 954                           p_dev->has_func_id ? p_dev->func_id : 0,
 955                           p_dev->func,
 956                           p_dev->device_no,
 957                           hash[0],
 958                           hash[1],
 959                           hash[2],
 960                           hash[3]))
 961                return -ENOMEM;
 962
 963        return 0;
 964}
 965
 966/************************ runtime PM support ***************************/
 967
 968static int pcmcia_dev_suspend(struct device *dev, pm_message_t state);
 969static int pcmcia_dev_resume(struct device *dev);
 970
 971static int runtime_suspend(struct device *dev)
 972{
 973        int rc;
 974
 975        device_lock(dev);
 976        rc = pcmcia_dev_suspend(dev, PMSG_SUSPEND);
 977        device_unlock(dev);
 978        return rc;
 979}
 980
 981static int runtime_resume(struct device *dev)
 982{
 983        int rc;
 984
 985        device_lock(dev);
 986        rc = pcmcia_dev_resume(dev);
 987        device_unlock(dev);
 988        return rc;
 989}
 990
 991/************************ per-device sysfs output ***************************/
 992
 993#define pcmcia_device_attr(field, test, format)                         \
 994static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf)              \
 995{                                                                       \
 996        struct pcmcia_device *p_dev = to_pcmcia_dev(dev);               \
 997        return p_dev->test ? sprintf(buf, format, p_dev->field) : -ENODEV; \
 998}                                                                       \
 999static DEVICE_ATTR_RO(field);
1000
1001#define pcmcia_device_stringattr(name, field)                                   \
1002static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf)               \
1003{                                                                       \
1004        struct pcmcia_device *p_dev = to_pcmcia_dev(dev);               \
1005        return p_dev->field ? sprintf(buf, "%s\n", p_dev->field) : -ENODEV; \
1006}                                                                       \
1007static DEVICE_ATTR_RO(name);
1008
1009pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
1010pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
1011pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
1012pcmcia_device_stringattr(prod_id1, prod_id[0]);
1013pcmcia_device_stringattr(prod_id2, prod_id[1]);
1014pcmcia_device_stringattr(prod_id3, prod_id[2]);
1015pcmcia_device_stringattr(prod_id4, prod_id[3]);
1016
1017static ssize_t function_show(struct device *dev, struct device_attribute *attr,
1018                             char *buf)
1019{
1020        struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1021        return p_dev->socket ? sprintf(buf, "0x%02x\n", p_dev->func) : -ENODEV;
1022}
1023static DEVICE_ATTR_RO(function);
1024
1025static ssize_t resources_show(struct device *dev,
1026                              struct device_attribute *attr, char *buf)
1027{
1028        struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1029        char *str = buf;
1030        int i;
1031
1032        for (i = 0; i < PCMCIA_NUM_RESOURCES; i++)
1033                str += sprintf(str, "%pr\n", p_dev->resource[i]);
1034
1035        return str - buf;
1036}
1037static DEVICE_ATTR_RO(resources);
1038
1039static ssize_t pm_state_show(struct device *dev, struct device_attribute *attr, char *buf)
1040{
1041        struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1042
1043        if (p_dev->suspended)
1044                return sprintf(buf, "off\n");
1045        else
1046                return sprintf(buf, "on\n");
1047}
1048
1049static ssize_t pm_state_store(struct device *dev, struct device_attribute *attr,
1050                              const char *buf, size_t count)
1051{
1052        struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1053        int ret = 0;
1054
1055        if (!count)
1056                return -EINVAL;
1057
1058        if ((!p_dev->suspended) && !strncmp(buf, "off", 3))
1059                ret = runtime_suspend(dev);
1060        else if (p_dev->suspended && !strncmp(buf, "on", 2))
1061                ret = runtime_resume(dev);
1062
1063        return ret ? ret : count;
1064}
1065static DEVICE_ATTR_RW(pm_state);
1066
1067static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1068{
1069        struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1070        int i;
1071        u32 hash[4] = { 0, 0, 0, 0};
1072
1073        /* calculate hashes */
1074        for (i = 0; i < 4; i++) {
1075                if (!p_dev->prod_id[i])
1076                        continue;
1077                hash[i] = crc32(0, p_dev->prod_id[i],
1078                                strlen(p_dev->prod_id[i]));
1079        }
1080        return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
1081                                "pa%08Xpb%08Xpc%08Xpd%08X\n",
1082                                p_dev->has_manf_id ? p_dev->manf_id : 0,
1083                                p_dev->has_card_id ? p_dev->card_id : 0,
1084                                p_dev->has_func_id ? p_dev->func_id : 0,
1085                                p_dev->func, p_dev->device_no,
1086                                hash[0], hash[1], hash[2], hash[3]);
1087}
1088static DEVICE_ATTR_RO(modalias);
1089
1090static ssize_t allow_func_id_match_store(struct device *dev,
1091                struct device_attribute *attr, const char *buf, size_t count)
1092{
1093        struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1094
1095        if (!count)
1096                return -EINVAL;
1097
1098        mutex_lock(&p_dev->socket->ops_mutex);
1099        p_dev->allow_func_id_match = 1;
1100        mutex_unlock(&p_dev->socket->ops_mutex);
1101        pcmcia_parse_uevents(p_dev->socket, PCMCIA_UEVENT_REQUERY);
1102
1103        return count;
1104}
1105static DEVICE_ATTR_WO(allow_func_id_match);
1106
1107static struct attribute *pcmcia_dev_attrs[] = {
1108        &dev_attr_resources.attr,
1109        &dev_attr_pm_state.attr,
1110        &dev_attr_function.attr,
1111        &dev_attr_func_id.attr,
1112        &dev_attr_manf_id.attr,
1113        &dev_attr_card_id.attr,
1114        &dev_attr_prod_id1.attr,
1115        &dev_attr_prod_id2.attr,
1116        &dev_attr_prod_id3.attr,
1117        &dev_attr_prod_id4.attr,
1118        &dev_attr_modalias.attr,
1119        &dev_attr_allow_func_id_match.attr,
1120        NULL,
1121};
1122ATTRIBUTE_GROUPS(pcmcia_dev);
1123
1124/* PM support, also needed for reset */
1125
1126static int pcmcia_dev_suspend(struct device *dev, pm_message_t state)
1127{
1128        struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1129        struct pcmcia_driver *p_drv = NULL;
1130        int ret = 0;
1131
1132        mutex_lock(&p_dev->socket->ops_mutex);
1133        if (p_dev->suspended) {
1134                mutex_unlock(&p_dev->socket->ops_mutex);
1135                return 0;
1136        }
1137        p_dev->suspended = 1;
1138        mutex_unlock(&p_dev->socket->ops_mutex);
1139
1140        dev_dbg(dev, "suspending\n");
1141
1142        if (dev->driver)
1143                p_drv = to_pcmcia_drv(dev->driver);
1144
1145        if (!p_drv)
1146                goto out;
1147
1148        if (p_drv->suspend) {
1149                ret = p_drv->suspend(p_dev);
1150                if (ret) {
1151                        dev_printk(KERN_ERR, dev,
1152                                   "pcmcia: device %s (driver %s) did "
1153                                   "not want to go to sleep (%d)\n",
1154                                   p_dev->devname, p_drv->name, ret);
1155                        mutex_lock(&p_dev->socket->ops_mutex);
1156                        p_dev->suspended = 0;
1157                        mutex_unlock(&p_dev->socket->ops_mutex);
1158                        goto out;
1159                }
1160        }
1161
1162        if (p_dev->device_no == p_dev->func) {
1163                dev_dbg(dev, "releasing configuration\n");
1164                pcmcia_release_configuration(p_dev);
1165        }
1166
1167 out:
1168        return ret;
1169}
1170
1171
1172static int pcmcia_dev_resume(struct device *dev)
1173{
1174        struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1175        struct pcmcia_driver *p_drv = NULL;
1176        int ret = 0;
1177
1178        mutex_lock(&p_dev->socket->ops_mutex);
1179        if (!p_dev->suspended) {
1180                mutex_unlock(&p_dev->socket->ops_mutex);
1181                return 0;
1182        }
1183        p_dev->suspended = 0;
1184        mutex_unlock(&p_dev->socket->ops_mutex);
1185
1186        dev_dbg(dev, "resuming\n");
1187
1188        if (dev->driver)
1189                p_drv = to_pcmcia_drv(dev->driver);
1190
1191        if (!p_drv)
1192                goto out;
1193
1194        if (p_dev->device_no == p_dev->func) {
1195                dev_dbg(dev, "requesting configuration\n");
1196                ret = pcmcia_enable_device(p_dev);
1197                if (ret)
1198                        goto out;
1199        }
1200
1201        if (p_drv->resume)
1202                ret = p_drv->resume(p_dev);
1203
1204 out:
1205        return ret;
1206}
1207
1208
1209static int pcmcia_bus_suspend_callback(struct device *dev, void * _data)
1210{
1211        struct pcmcia_socket *skt = _data;
1212        struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1213
1214        if (p_dev->socket != skt || p_dev->suspended)
1215                return 0;
1216
1217        return runtime_suspend(dev);
1218}
1219
1220static int pcmcia_bus_resume_callback(struct device *dev, void * _data)
1221{
1222        struct pcmcia_socket *skt = _data;
1223        struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1224
1225        if (p_dev->socket != skt || !p_dev->suspended)
1226                return 0;
1227
1228        runtime_resume(dev);
1229
1230        return 0;
1231}
1232
1233static int pcmcia_bus_resume(struct pcmcia_socket *skt)
1234{
1235        dev_dbg(&skt->dev, "resuming socket %d\n", skt->sock);
1236        bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback);
1237        return 0;
1238}
1239
1240static int pcmcia_bus_suspend(struct pcmcia_socket *skt)
1241{
1242        dev_dbg(&skt->dev, "suspending socket %d\n", skt->sock);
1243        if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt,
1244                             pcmcia_bus_suspend_callback)) {
1245                pcmcia_bus_resume(skt);
1246                return -EIO;
1247        }
1248        return 0;
1249}
1250
1251static int pcmcia_bus_remove(struct pcmcia_socket *skt)
1252{
1253        atomic_set(&skt->present, 0);
1254        pcmcia_card_remove(skt, NULL);
1255
1256        mutex_lock(&skt->ops_mutex);
1257        destroy_cis_cache(skt);
1258        pcmcia_cleanup_irq(skt);
1259        mutex_unlock(&skt->ops_mutex);
1260
1261        return 0;
1262}
1263
1264static int pcmcia_bus_add(struct pcmcia_socket *skt)
1265{
1266        atomic_set(&skt->present, 1);
1267
1268        mutex_lock(&skt->ops_mutex);
1269        skt->pcmcia_pfc = 0;
1270        destroy_cis_cache(skt); /* to be on the safe side... */
1271        mutex_unlock(&skt->ops_mutex);
1272
1273        pcmcia_card_add(skt);
1274
1275        return 0;
1276}
1277
1278static int pcmcia_bus_early_resume(struct pcmcia_socket *skt)
1279{
1280        if (!verify_cis_cache(skt))
1281                return 0;
1282
1283        dev_dbg(&skt->dev, "cis mismatch - different card\n");
1284
1285        /* first, remove the card */
1286        pcmcia_bus_remove(skt);
1287
1288        mutex_lock(&skt->ops_mutex);
1289        destroy_cis_cache(skt);
1290        kfree(skt->fake_cis);
1291        skt->fake_cis = NULL;
1292        skt->functions = 0;
1293        mutex_unlock(&skt->ops_mutex);
1294
1295        /* now, add the new card */
1296        pcmcia_bus_add(skt);
1297        return 0;
1298}
1299
1300
1301/*
1302 * NOTE: This is racy. There's no guarantee the card will still be
1303 * physically present, even if the call to this function returns
1304 * non-NULL. Furthermore, the device driver most likely is unbound
1305 * almost immediately, so the timeframe where pcmcia_dev_present
1306 * returns NULL is probably really really small.
1307 */
1308struct pcmcia_device *pcmcia_dev_present(struct pcmcia_device *_p_dev)
1309{
1310        struct pcmcia_device *p_dev;
1311        struct pcmcia_device *ret = NULL;
1312
1313        p_dev = pcmcia_get_dev(_p_dev);
1314        if (!p_dev)
1315                return NULL;
1316
1317        if (atomic_read(&p_dev->socket->present) != 0)
1318                ret = p_dev;
1319
1320        pcmcia_put_dev(p_dev);
1321        return ret;
1322}
1323EXPORT_SYMBOL(pcmcia_dev_present);
1324
1325
1326static struct pcmcia_callback pcmcia_bus_callback = {
1327        .owner = THIS_MODULE,
1328        .add = pcmcia_bus_add,
1329        .remove = pcmcia_bus_remove,
1330        .requery = pcmcia_requery,
1331        .validate = pccard_validate_cis,
1332        .suspend = pcmcia_bus_suspend,
1333        .early_resume = pcmcia_bus_early_resume,
1334        .resume = pcmcia_bus_resume,
1335};
1336
1337static int pcmcia_bus_add_socket(struct device *dev,
1338                                           struct class_interface *class_intf)
1339{
1340        struct pcmcia_socket *socket = dev_get_drvdata(dev);
1341        int ret;
1342
1343        socket = pcmcia_get_socket(socket);
1344        if (!socket) {
1345                dev_printk(KERN_ERR, dev,
1346                           "PCMCIA obtaining reference to socket failed\n");
1347                return -ENODEV;
1348        }
1349
1350        ret = sysfs_create_bin_file(&dev->kobj, &pccard_cis_attr);
1351        if (ret) {
1352                dev_printk(KERN_ERR, dev, "PCMCIA registration failed\n");
1353                pcmcia_put_socket(socket);
1354                return ret;
1355        }
1356
1357        INIT_LIST_HEAD(&socket->devices_list);
1358        socket->pcmcia_pfc = 0;
1359        socket->device_count = 0;
1360        atomic_set(&socket->present, 0);
1361
1362        ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback);
1363        if (ret) {
1364                dev_printk(KERN_ERR, dev, "PCMCIA registration failed\n");
1365                pcmcia_put_socket(socket);
1366                return ret;
1367        }
1368
1369        return 0;
1370}
1371
1372static void pcmcia_bus_remove_socket(struct device *dev,
1373                                     struct class_interface *class_intf)
1374{
1375        struct pcmcia_socket *socket = dev_get_drvdata(dev);
1376
1377        if (!socket)
1378                return;
1379
1380        pccard_register_pcmcia(socket, NULL);
1381
1382        /* unregister any unbound devices */
1383        mutex_lock(&socket->skt_mutex);
1384        pcmcia_card_remove(socket, NULL);
1385        release_cis_mem(socket);
1386        mutex_unlock(&socket->skt_mutex);
1387
1388        sysfs_remove_bin_file(&dev->kobj, &pccard_cis_attr);
1389
1390        pcmcia_put_socket(socket);
1391
1392        return;
1393}
1394
1395
1396/* the pcmcia_bus_interface is used to handle pcmcia socket devices */
1397static struct class_interface pcmcia_bus_interface __refdata = {
1398        .class = &pcmcia_socket_class,
1399        .add_dev = &pcmcia_bus_add_socket,
1400        .remove_dev = &pcmcia_bus_remove_socket,
1401};
1402
1403
1404struct bus_type pcmcia_bus_type = {
1405        .name = "pcmcia",
1406        .uevent = pcmcia_bus_uevent,
1407        .match = pcmcia_bus_match,
1408        .dev_groups = pcmcia_dev_groups,
1409        .probe = pcmcia_device_probe,
1410        .remove = pcmcia_device_remove,
1411        .suspend = pcmcia_dev_suspend,
1412        .resume = pcmcia_dev_resume,
1413};
1414
1415
1416static int __init init_pcmcia_bus(void)
1417{
1418        int ret;
1419
1420        ret = bus_register(&pcmcia_bus_type);
1421        if (ret < 0) {
1422                printk(KERN_WARNING "pcmcia: bus_register error: %d\n", ret);
1423                return ret;
1424        }
1425        ret = class_interface_register(&pcmcia_bus_interface);
1426        if (ret < 0) {
1427                printk(KERN_WARNING
1428                        "pcmcia: class_interface_register error: %d\n", ret);
1429                bus_unregister(&pcmcia_bus_type);
1430                return ret;
1431        }
1432
1433        return 0;
1434}
1435fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that
1436                               * pcmcia_socket_class is already registered */
1437
1438
1439static void __exit exit_pcmcia_bus(void)
1440{
1441        class_interface_unregister(&pcmcia_bus_interface);
1442
1443        bus_unregister(&pcmcia_bus_type);
1444}
1445module_exit(exit_pcmcia_bus);
1446
1447
1448MODULE_ALIAS("ds");
1449