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->functions == 0) {
 671                pcmcia_card_add(s);
 672                return;
 673        }
 674
 675        /* some device information might have changed because of a CIS
 676         * update or because we can finally read it correctly... so
 677         * determine it again, overwriting old values if necessary. */
 678        bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery_callback);
 679
 680        /* if the CIS changed, we need to check whether the number of
 681         * functions changed. */
 682        if (s->fake_cis) {
 683                int old_funcs, new_funcs;
 684                cistpl_longlink_mfc_t mfc;
 685
 686                /* does this cis override add or remove functions? */
 687                old_funcs = s->functions;
 688
 689                if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC,
 690                                        &mfc))
 691                        new_funcs = mfc.nfn;
 692                else
 693                        new_funcs = 1;
 694                if (old_funcs != new_funcs) {
 695                        /* we need to re-start */
 696                        pcmcia_card_remove(s, NULL);
 697                        s->functions = 0;
 698                        pcmcia_card_add(s);
 699                }
 700        }
 701
 702        /* If the PCMCIA device consists of two pseudo devices,
 703         * call pcmcia_device_add() -- which will fail if both
 704         * devices are already registered. */
 705        mutex_lock(&s->ops_mutex);
 706        has_pfc = s->pcmcia_pfc;
 707        mutex_unlock(&s->ops_mutex);
 708        if (has_pfc)
 709                pcmcia_device_add(s, 0);
 710
 711        /* we re-scan all devices, not just the ones connected to this
 712         * socket. This does not matter, though. */
 713        if (bus_rescan_devices(&pcmcia_bus_type))
 714                dev_warn(&s->dev, "rescanning the bus failed\n");
 715}
 716
 717
 718#ifdef CONFIG_PCMCIA_LOAD_CIS
 719
 720/**
 721 * pcmcia_load_firmware - load CIS from userspace if device-provided is broken
 722 * @dev: the pcmcia device which needs a CIS override
 723 * @filename: requested filename in /lib/firmware/
 724 *
 725 * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if
 726 * the one provided by the card is broken. The firmware files reside in
 727 * /lib/firmware/ in userspace.
 728 */
 729static int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
 730{
 731        struct pcmcia_socket *s = dev->socket;
 732        const struct firmware *fw;
 733        int ret = -ENOMEM;
 734        cistpl_longlink_mfc_t mfc;
 735        int old_funcs, new_funcs = 1;
 736
 737        if (!filename)
 738                return -EINVAL;
 739
 740        dev_dbg(&dev->dev, "trying to load CIS file %s\n", filename);
 741
 742        if (request_firmware(&fw, filename, &dev->dev) == 0) {
 743                if (fw->size >= CISTPL_MAX_CIS_SIZE) {
 744                        ret = -EINVAL;
 745                        dev_printk(KERN_ERR, &dev->dev,
 746                                   "pcmcia: CIS override is too big\n");
 747                        goto release;
 748                }
 749
 750                if (!pcmcia_replace_cis(s, fw->data, fw->size))
 751                        ret = 0;
 752                else {
 753                        dev_printk(KERN_ERR, &dev->dev,
 754                                   "pcmcia: CIS override failed\n");
 755                        goto release;
 756                }
 757
 758                /* we need to re-start if the number of functions changed */
 759                old_funcs = s->functions;
 760                if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC,
 761                                        &mfc))
 762                        new_funcs = mfc.nfn;
 763
 764                if (old_funcs != new_funcs)
 765                        ret = -EBUSY;
 766
 767                /* update information */
 768                pcmcia_device_query(dev);
 769
 770                /* requery (as number of functions might have changed) */
 771                pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY);
 772        }
 773 release:
 774        release_firmware(fw);
 775
 776        return ret;
 777}
 778
 779#else /* !CONFIG_PCMCIA_LOAD_CIS */
 780
 781static inline int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
 782{
 783        return -ENODEV;
 784}
 785
 786#endif
 787
 788
 789static inline int pcmcia_devmatch(struct pcmcia_device *dev,
 790                                  const struct pcmcia_device_id *did)
 791{
 792        if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
 793                if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
 794                        return 0;
 795        }
 796
 797        if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
 798                if ((!dev->has_card_id) || (dev->card_id != did->card_id))
 799                        return 0;
 800        }
 801
 802        if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
 803                if (dev->func != did->function)
 804                        return 0;
 805        }
 806
 807        if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
 808                if (!dev->prod_id[0])
 809                        return 0;
 810                if (strcmp(did->prod_id[0], dev->prod_id[0]))
 811                        return 0;
 812        }
 813
 814        if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
 815                if (!dev->prod_id[1])
 816                        return 0;
 817                if (strcmp(did->prod_id[1], dev->prod_id[1]))
 818                        return 0;
 819        }
 820
 821        if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
 822                if (!dev->prod_id[2])
 823                        return 0;
 824                if (strcmp(did->prod_id[2], dev->prod_id[2]))
 825                        return 0;
 826        }
 827
 828        if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
 829                if (!dev->prod_id[3])
 830                        return 0;
 831                if (strcmp(did->prod_id[3], dev->prod_id[3]))
 832                        return 0;
 833        }
 834
 835        if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
 836                dev_dbg(&dev->dev, "this is a pseudo-multi-function device\n");
 837                mutex_lock(&dev->socket->ops_mutex);
 838                dev->socket->pcmcia_pfc = 1;
 839                mutex_unlock(&dev->socket->ops_mutex);
 840                if (dev->device_no != did->device_no)
 841                        return 0;
 842        }
 843
 844        if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
 845                int ret;
 846
 847                if ((!dev->has_func_id) || (dev->func_id != did->func_id))
 848                        return 0;
 849
 850                /* if this is a pseudo-multi-function device,
 851                 * we need explicit matches */
 852                if (dev->socket->pcmcia_pfc)
 853                        return 0;
 854                if (dev->device_no)
 855                        return 0;
 856
 857                /* also, FUNC_ID matching needs to be activated by userspace
 858                 * after it has re-checked that there is no possible module
 859                 * with a prod_id/manf_id/card_id match.
 860                 */
 861                mutex_lock(&dev->socket->ops_mutex);
 862                ret = dev->allow_func_id_match;
 863                mutex_unlock(&dev->socket->ops_mutex);
 864
 865                if (!ret) {
 866                        dev_dbg(&dev->dev,
 867                                "skipping FUNC_ID match until userspace ACK\n");
 868                        return 0;
 869                }
 870        }
 871
 872        if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
 873                dev_dbg(&dev->dev, "device needs a fake CIS\n");
 874                if (!dev->socket->fake_cis)
 875                        if (pcmcia_load_firmware(dev, did->cisfile))
 876                                return 0;
 877        }
 878
 879        if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
 880                int i;
 881                for (i = 0; i < 4; i++)
 882                        if (dev->prod_id[i])
 883                                return 0;
 884                if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
 885                        return 0;
 886        }
 887
 888        return 1;
 889}
 890
 891
 892static int pcmcia_bus_match(struct device *dev, struct device_driver *drv)
 893{
 894        struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 895        struct pcmcia_driver *p_drv = to_pcmcia_drv(drv);
 896        const struct pcmcia_device_id *did = p_drv->id_table;
 897        struct pcmcia_dynid *dynid;
 898
 899        /* match dynamic devices first */
 900        mutex_lock(&p_drv->dynids.lock);
 901        list_for_each_entry(dynid, &p_drv->dynids.list, node) {
 902                dev_dbg(dev, "trying to match to %s\n", drv->name);
 903                if (pcmcia_devmatch(p_dev, &dynid->id)) {
 904                        dev_dbg(dev, "matched to %s\n", drv->name);
 905                        mutex_unlock(&p_drv->dynids.lock);
 906                        return 1;
 907                }
 908        }
 909        mutex_unlock(&p_drv->dynids.lock);
 910
 911        while (did && did->match_flags) {
 912                dev_dbg(dev, "trying to match to %s\n", drv->name);
 913                if (pcmcia_devmatch(p_dev, did)) {
 914                        dev_dbg(dev, "matched to %s\n", drv->name);
 915                        return 1;
 916                }
 917                did++;
 918        }
 919
 920        return 0;
 921}
 922
 923#ifdef CONFIG_HOTPLUG
 924
 925static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
 926{
 927        struct pcmcia_device *p_dev;
 928        int i;
 929        u32 hash[4] = { 0, 0, 0, 0};
 930
 931        if (!dev)
 932                return -ENODEV;
 933
 934        p_dev = to_pcmcia_dev(dev);
 935
 936        /* calculate hashes */
 937        for (i = 0; i < 4; i++) {
 938                if (!p_dev->prod_id[i])
 939                        continue;
 940                hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
 941        }
 942
 943        if (add_uevent_var(env, "SOCKET_NO=%u", p_dev->socket->sock))
 944                return -ENOMEM;
 945
 946        if (add_uevent_var(env, "DEVICE_NO=%02X", p_dev->device_no))
 947                return -ENOMEM;
 948
 949        if (add_uevent_var(env, "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
 950                           "pa%08Xpb%08Xpc%08Xpd%08X",
 951                           p_dev->has_manf_id ? p_dev->manf_id : 0,
 952                           p_dev->has_card_id ? p_dev->card_id : 0,
 953                           p_dev->has_func_id ? p_dev->func_id : 0,
 954                           p_dev->func,
 955                           p_dev->device_no,
 956                           hash[0],
 957                           hash[1],
 958                           hash[2],
 959                           hash[3]))
 960                return -ENOMEM;
 961
 962        return 0;
 963}
 964
 965#else
 966
 967static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
 968{
 969        return -ENODEV;
 970}
 971
 972#endif
 973
 974/************************ runtime PM support ***************************/
 975
 976static int pcmcia_dev_suspend(struct device *dev, pm_message_t state);
 977static int pcmcia_dev_resume(struct device *dev);
 978
 979static int runtime_suspend(struct device *dev)
 980{
 981        int rc;
 982
 983        device_lock(dev);
 984        rc = pcmcia_dev_suspend(dev, PMSG_SUSPEND);
 985        device_unlock(dev);
 986        return rc;
 987}
 988
 989static int runtime_resume(struct device *dev)
 990{
 991        int rc;
 992
 993        device_lock(dev);
 994        rc = pcmcia_dev_resume(dev);
 995        device_unlock(dev);
 996        return rc;
 997}
 998
 999/************************ per-device sysfs output ***************************/
1000
1001#define pcmcia_device_attr(field, test, format)                         \
1002static ssize_t field##_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->test ? sprintf(buf, format, p_dev->field) : -ENODEV; \
1006}
1007
1008#define pcmcia_device_stringattr(name, field)                                   \
1009static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf)               \
1010{                                                                       \
1011        struct pcmcia_device *p_dev = to_pcmcia_dev(dev);               \
1012        return p_dev->field ? sprintf(buf, "%s\n", p_dev->field) : -ENODEV; \
1013}
1014
1015pcmcia_device_attr(func, socket, "0x%02x\n");
1016pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
1017pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
1018pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
1019pcmcia_device_stringattr(prod_id1, prod_id[0]);
1020pcmcia_device_stringattr(prod_id2, prod_id[1]);
1021pcmcia_device_stringattr(prod_id3, prod_id[2]);
1022pcmcia_device_stringattr(prod_id4, prod_id[3]);
1023
1024static ssize_t pcmcia_show_resources(struct device *dev,
1025                                     struct device_attribute *attr, char *buf)
1026{
1027        struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1028        char *str = buf;
1029        int i;
1030
1031        for (i = 0; i < PCMCIA_NUM_RESOURCES; i++)
1032                str += sprintf(str, "%pr\n", p_dev->resource[i]);
1033
1034        return str - buf;
1035}
1036
1037static ssize_t pcmcia_show_pm_state(struct device *dev, struct device_attribute *attr, char *buf)
1038{
1039        struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1040
1041        if (p_dev->suspended)
1042                return sprintf(buf, "off\n");
1043        else
1044                return sprintf(buf, "on\n");
1045}
1046
1047static ssize_t pcmcia_store_pm_state(struct device *dev, struct device_attribute *attr,
1048                                     const char *buf, size_t count)
1049{
1050        struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1051        int ret = 0;
1052
1053        if (!count)
1054                return -EINVAL;
1055
1056        if ((!p_dev->suspended) && !strncmp(buf, "off", 3))
1057                ret = runtime_suspend(dev);
1058        else if (p_dev->suspended && !strncmp(buf, "on", 2))
1059                ret = runtime_resume(dev);
1060
1061        return ret ? ret : count;
1062}
1063
1064
1065static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1066{
1067        struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1068        int i;
1069        u32 hash[4] = { 0, 0, 0, 0};
1070
1071        /* calculate hashes */
1072        for (i = 0; i < 4; i++) {
1073                if (!p_dev->prod_id[i])
1074                        continue;
1075                hash[i] = crc32(0, p_dev->prod_id[i],
1076                                strlen(p_dev->prod_id[i]));
1077        }
1078        return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
1079                                "pa%08Xpb%08Xpc%08Xpd%08X\n",
1080                                p_dev->has_manf_id ? p_dev->manf_id : 0,
1081                                p_dev->has_card_id ? p_dev->card_id : 0,
1082                                p_dev->has_func_id ? p_dev->func_id : 0,
1083                                p_dev->func, p_dev->device_no,
1084                                hash[0], hash[1], hash[2], hash[3]);
1085}
1086
1087static ssize_t pcmcia_store_allow_func_id_match(struct device *dev,
1088                struct device_attribute *attr, const char *buf, size_t count)
1089{
1090        struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1091
1092        if (!count)
1093                return -EINVAL;
1094
1095        mutex_lock(&p_dev->socket->ops_mutex);
1096        p_dev->allow_func_id_match = 1;
1097        mutex_unlock(&p_dev->socket->ops_mutex);
1098        pcmcia_parse_uevents(p_dev->socket, PCMCIA_UEVENT_REQUERY);
1099
1100        return count;
1101}
1102
1103static struct device_attribute pcmcia_dev_attrs[] = {
1104        __ATTR(function, 0444, func_show, NULL),
1105        __ATTR(pm_state, 0644, pcmcia_show_pm_state, pcmcia_store_pm_state),
1106        __ATTR(resources, 0444, pcmcia_show_resources, NULL),
1107        __ATTR_RO(func_id),
1108        __ATTR_RO(manf_id),
1109        __ATTR_RO(card_id),
1110        __ATTR_RO(prod_id1),
1111        __ATTR_RO(prod_id2),
1112        __ATTR_RO(prod_id3),
1113        __ATTR_RO(prod_id4),
1114        __ATTR_RO(modalias),
1115        __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match),
1116        __ATTR_NULL,
1117};
1118
1119/* PM support, also needed for reset */
1120
1121static int pcmcia_dev_suspend(struct device *dev, pm_message_t state)
1122{
1123        struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1124        struct pcmcia_driver *p_drv = NULL;
1125        int ret = 0;
1126
1127        mutex_lock(&p_dev->socket->ops_mutex);
1128        if (p_dev->suspended) {
1129                mutex_unlock(&p_dev->socket->ops_mutex);
1130                return 0;
1131        }
1132        p_dev->suspended = 1;
1133        mutex_unlock(&p_dev->socket->ops_mutex);
1134
1135        dev_dbg(dev, "suspending\n");
1136
1137        if (dev->driver)
1138                p_drv = to_pcmcia_drv(dev->driver);
1139
1140        if (!p_drv)
1141                goto out;
1142
1143        if (p_drv->suspend) {
1144                ret = p_drv->suspend(p_dev);
1145                if (ret) {
1146                        dev_printk(KERN_ERR, dev,
1147                                   "pcmcia: device %s (driver %s) did "
1148                                   "not want to go to sleep (%d)\n",
1149                                   p_dev->devname, p_drv->name, ret);
1150                        mutex_lock(&p_dev->socket->ops_mutex);
1151                        p_dev->suspended = 0;
1152                        mutex_unlock(&p_dev->socket->ops_mutex);
1153                        goto out;
1154                }
1155        }
1156
1157        if (p_dev->device_no == p_dev->func) {
1158                dev_dbg(dev, "releasing configuration\n");
1159                pcmcia_release_configuration(p_dev);
1160        }
1161
1162 out:
1163        return ret;
1164}
1165
1166
1167static int pcmcia_dev_resume(struct device *dev)
1168{
1169        struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1170        struct pcmcia_driver *p_drv = NULL;
1171        int ret = 0;
1172
1173        mutex_lock(&p_dev->socket->ops_mutex);
1174        if (!p_dev->suspended) {
1175                mutex_unlock(&p_dev->socket->ops_mutex);
1176                return 0;
1177        }
1178        p_dev->suspended = 0;
1179        mutex_unlock(&p_dev->socket->ops_mutex);
1180
1181        dev_dbg(dev, "resuming\n");
1182
1183        if (dev->driver)
1184                p_drv = to_pcmcia_drv(dev->driver);
1185
1186        if (!p_drv)
1187                goto out;
1188
1189        if (p_dev->device_no == p_dev->func) {
1190                dev_dbg(dev, "requesting configuration\n");
1191                ret = pcmcia_enable_device(p_dev);
1192                if (ret)
1193                        goto out;
1194        }
1195
1196        if (p_drv->resume)
1197                ret = p_drv->resume(p_dev);
1198
1199 out:
1200        return ret;
1201}
1202
1203
1204static int pcmcia_bus_suspend_callback(struct device *dev, void * _data)
1205{
1206        struct pcmcia_socket *skt = _data;
1207        struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1208
1209        if (p_dev->socket != skt || p_dev->suspended)
1210                return 0;
1211
1212        return runtime_suspend(dev);
1213}
1214
1215static int pcmcia_bus_resume_callback(struct device *dev, void * _data)
1216{
1217        struct pcmcia_socket *skt = _data;
1218        struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1219
1220        if (p_dev->socket != skt || !p_dev->suspended)
1221                return 0;
1222
1223        runtime_resume(dev);
1224
1225        return 0;
1226}
1227
1228static int pcmcia_bus_resume(struct pcmcia_socket *skt)
1229{
1230        dev_dbg(&skt->dev, "resuming socket %d\n", skt->sock);
1231        bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback);
1232        return 0;
1233}
1234
1235static int pcmcia_bus_suspend(struct pcmcia_socket *skt)
1236{
1237        dev_dbg(&skt->dev, "suspending socket %d\n", skt->sock);
1238        if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt,
1239                             pcmcia_bus_suspend_callback)) {
1240                pcmcia_bus_resume(skt);
1241                return -EIO;
1242        }
1243        return 0;
1244}
1245
1246static int pcmcia_bus_remove(struct pcmcia_socket *skt)
1247{
1248        atomic_set(&skt->present, 0);
1249        pcmcia_card_remove(skt, NULL);
1250
1251        mutex_lock(&skt->ops_mutex);
1252        destroy_cis_cache(skt);
1253        pcmcia_cleanup_irq(skt);
1254        mutex_unlock(&skt->ops_mutex);
1255
1256        return 0;
1257}
1258
1259static int pcmcia_bus_add(struct pcmcia_socket *skt)
1260{
1261        atomic_set(&skt->present, 1);
1262
1263        mutex_lock(&skt->ops_mutex);
1264        skt->pcmcia_pfc = 0;
1265        destroy_cis_cache(skt); /* to be on the safe side... */
1266        mutex_unlock(&skt->ops_mutex);
1267
1268        pcmcia_card_add(skt);
1269
1270        return 0;
1271}
1272
1273static int pcmcia_bus_early_resume(struct pcmcia_socket *skt)
1274{
1275        if (!verify_cis_cache(skt))
1276                return 0;
1277
1278        dev_dbg(&skt->dev, "cis mismatch - different card\n");
1279
1280        /* first, remove the card */
1281        pcmcia_bus_remove(skt);
1282
1283        mutex_lock(&skt->ops_mutex);
1284        destroy_cis_cache(skt);
1285        kfree(skt->fake_cis);
1286        skt->fake_cis = NULL;
1287        skt->functions = 0;
1288        mutex_unlock(&skt->ops_mutex);
1289
1290        /* now, add the new card */
1291        pcmcia_bus_add(skt);
1292        return 0;
1293}
1294
1295
1296/*
1297 * NOTE: This is racy. There's no guarantee the card will still be
1298 * physically present, even if the call to this function returns
1299 * non-NULL. Furthermore, the device driver most likely is unbound
1300 * almost immediately, so the timeframe where pcmcia_dev_present
1301 * returns NULL is probably really really small.
1302 */
1303struct pcmcia_device *pcmcia_dev_present(struct pcmcia_device *_p_dev)
1304{
1305        struct pcmcia_device *p_dev;
1306        struct pcmcia_device *ret = NULL;
1307
1308        p_dev = pcmcia_get_dev(_p_dev);
1309        if (!p_dev)
1310                return NULL;
1311
1312        if (atomic_read(&p_dev->socket->present) != 0)
1313                ret = p_dev;
1314
1315        pcmcia_put_dev(p_dev);
1316        return ret;
1317}
1318EXPORT_SYMBOL(pcmcia_dev_present);
1319
1320
1321static struct pcmcia_callback pcmcia_bus_callback = {
1322        .owner = THIS_MODULE,
1323        .add = pcmcia_bus_add,
1324        .remove = pcmcia_bus_remove,
1325        .requery = pcmcia_requery,
1326        .validate = pccard_validate_cis,
1327        .suspend = pcmcia_bus_suspend,
1328        .early_resume = pcmcia_bus_early_resume,
1329        .resume = pcmcia_bus_resume,
1330};
1331
1332static int __devinit pcmcia_bus_add_socket(struct device *dev,
1333                                           struct class_interface *class_intf)
1334{
1335        struct pcmcia_socket *socket = dev_get_drvdata(dev);
1336        int ret;
1337
1338        socket = pcmcia_get_socket(socket);
1339        if (!socket) {
1340                dev_printk(KERN_ERR, dev,
1341                           "PCMCIA obtaining reference to socket failed\n");
1342                return -ENODEV;
1343        }
1344
1345        ret = sysfs_create_bin_file(&dev->kobj, &pccard_cis_attr);
1346        if (ret) {
1347                dev_printk(KERN_ERR, dev, "PCMCIA registration failed\n");
1348                pcmcia_put_socket(socket);
1349                return ret;
1350        }
1351
1352        INIT_LIST_HEAD(&socket->devices_list);
1353        socket->pcmcia_pfc = 0;
1354        socket->device_count = 0;
1355        atomic_set(&socket->present, 0);
1356
1357        ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback);
1358        if (ret) {
1359                dev_printk(KERN_ERR, dev, "PCMCIA registration failed\n");
1360                pcmcia_put_socket(socket);
1361                return ret;
1362        }
1363
1364        return 0;
1365}
1366
1367static void pcmcia_bus_remove_socket(struct device *dev,
1368                                     struct class_interface *class_intf)
1369{
1370        struct pcmcia_socket *socket = dev_get_drvdata(dev);
1371
1372        if (!socket)
1373                return;
1374
1375        pccard_register_pcmcia(socket, NULL);
1376
1377        /* unregister any unbound devices */
1378        mutex_lock(&socket->skt_mutex);
1379        pcmcia_card_remove(socket, NULL);
1380        release_cis_mem(socket);
1381        mutex_unlock(&socket->skt_mutex);
1382
1383        sysfs_remove_bin_file(&dev->kobj, &pccard_cis_attr);
1384
1385        pcmcia_put_socket(socket);
1386
1387        return;
1388}
1389
1390
1391/* the pcmcia_bus_interface is used to handle pcmcia socket devices */
1392static struct class_interface pcmcia_bus_interface __refdata = {
1393        .class = &pcmcia_socket_class,
1394        .add_dev = &pcmcia_bus_add_socket,
1395        .remove_dev = &pcmcia_bus_remove_socket,
1396};
1397
1398
1399struct bus_type pcmcia_bus_type = {
1400        .name = "pcmcia",
1401        .uevent = pcmcia_bus_uevent,
1402        .match = pcmcia_bus_match,
1403        .dev_attrs = pcmcia_dev_attrs,
1404        .probe = pcmcia_device_probe,
1405        .remove = pcmcia_device_remove,
1406        .suspend = pcmcia_dev_suspend,
1407        .resume = pcmcia_dev_resume,
1408};
1409
1410
1411static int __init init_pcmcia_bus(void)
1412{
1413        int ret;
1414
1415        ret = bus_register(&pcmcia_bus_type);
1416        if (ret < 0) {
1417                printk(KERN_WARNING "pcmcia: bus_register error: %d\n", ret);
1418                return ret;
1419        }
1420        ret = class_interface_register(&pcmcia_bus_interface);
1421        if (ret < 0) {
1422                printk(KERN_WARNING
1423                        "pcmcia: class_interface_register error: %d\n", ret);
1424                bus_unregister(&pcmcia_bus_type);
1425                return ret;
1426        }
1427
1428        return 0;
1429}
1430fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that
1431                               * pcmcia_socket_class is already registered */
1432
1433
1434static void __exit exit_pcmcia_bus(void)
1435{
1436        class_interface_unregister(&pcmcia_bus_interface);
1437
1438        bus_unregister(&pcmcia_bus_type);
1439}
1440module_exit(exit_pcmcia_bus);
1441
1442
1443MODULE_ALIAS("ds");
1444
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