drivers/pcmcia/ds.c

   1 /*
   2  * ds.c -- 16-bit PCMCIA core support
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2 as
   6  * published by the Free Software Foundation.
   7  *
   8  * The initial developer of the original code is David A. Hinds
   9  * <dahinds@users.sourceforge.net>.  Portions created by David A. Hinds
  10  * are Copyright (C) 1999 David A. Hinds.  All Rights Reserved.
  11  *
  12  * (C) 1999             David A. Hinds
  13  * (C) 2003 - 2006      Dominik Brodowski
  14  */
  15
  16 #include <linux/kernel.h>
  17 #include <linux/module.h>
  18 #include <linux/init.h>
  19 #include <linux/errno.h>
  20 #include <linux/list.h>
  21 #include <linux/delay.h>
  22 #include <linux/workqueue.h>
  23 #include <linux/crc32.h>
  24 #include <linux/firmware.h>
  25 #include <linux/kref.h>
  26 #include <linux/dma-mapping.h>
  27
  28 #include <pcmcia/cs_types.h>
  29 #include <pcmcia/cs.h>
  30 #include <pcmcia/cistpl.h>
  31 #include <pcmcia/ds.h>
  32 #include <pcmcia/ss.h>
  33
  34 #include "cs_internal.h"
  35 #include "ds_internal.h"
  36
  37 /*====================================================================*/
  38
  39 /* Module parameters */
  40
  41 MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
  42 MODULE_DESCRIPTION("PCMCIA Driver Services");
  43 MODULE_LICENSE("GPL");
  44
  45 #ifdef CONFIG_PCMCIA_DEBUG
  46 int ds_pc_debug;
  47
  48 module_param_named(pc_debug, ds_pc_debug, int, 0644);
  49
  50 #define ds_dbg(lvl, fmt, arg...) do {                           \
  51         if (ds_pc_debug > (lvl))                                \
  52                 printk(KERN_DEBUG "ds: " fmt , ## arg);         \
  53 } while (0)
  54 #define ds_dev_dbg(lvl, dev, fmt, arg...) do {                          \
  55         if (ds_pc_debug > (lvl))                                        \
  56                 dev_printk(KERN_DEBUG, dev, "ds: " fmt , ## arg);       \
  57 } while (0)
  58 #else
  59 #define ds_dbg(lvl, fmt, arg...) do { } while (0)
  60 #define ds_dev_dbg(lvl, dev, fmt, arg...) do { } while (0)
  61 #endif
  62
  63 spinlock_t pcmcia_dev_list_lock;
  64
  65 /*====================================================================*/
  66
  67 /* code which was in cs.c before */
  68
  69 /* String tables for error messages */
  70
  71 typedef struct lookup_t {
  72     int key;
  73     char *msg;
  74 } lookup_t;
  75
  76 static const lookup_t error_table[] = {
  77     { 0,                        "Operation succeeded" },
  78     { CS_BAD_BASE,              "Bad base address" },
  79     { CS_BAD_IRQ,               "Bad IRQ" },
  80     { CS_BAD_OFFSET,            "Bad offset" },
  81     { CS_BAD_SIZE,              "Bad size" },
  82     { -EIO,                     "Input/Output error" },
  83     { -ENODEV,                  "No card present" },
  84     { -EINVAL,                  "Bad parameter" },
  85     { CS_BAD_ARGS,              "Bad arguments" },
  86     { -EACCES,                  "Configuration locked" },
  87     { -EBUSY,                   "Resource in use" },
  88     { -ENOSPC,                  "No more items" },
  89     { -ENOMEM,                  "Out of resource" },
  90     { CS_BAD_TUPLE,             "Bad CIS tuple" }
  91 };
  92
  93
  94 static const lookup_t service_table[] = {
  95     { AccessConfigurationRegister,      "AccessConfigurationRegister" },
  96     { AddSocketServices,                "AddSocketServices" },
  97     { AdjustResourceInfo,               "AdjustResourceInfo" },
  98     { CheckEraseQueue,                  "CheckEraseQueue" },
  99     { CloseMemory,                      "CloseMemory" },
 100     { DeregisterClient,                 "DeregisterClient" },
 101     { DeregisterEraseQueue,             "DeregisterEraseQueue" },
 102     { GetCardServicesInfo,              "GetCardServicesInfo" },
 103     { GetClientInfo,                    "GetClientInfo" },
 104     { GetConfigurationInfo,             "GetConfigurationInfo" },
 105     { GetEventMask,                     "GetEventMask" },
 106     { GetFirstClient,                   "GetFirstClient" },
 107     { GetFirstRegion,                   "GetFirstRegion" },
 108     { GetFirstTuple,                    "GetFirstTuple" },
 109     { GetNextClient,                    "GetNextClient" },
 110     { GetNextRegion,                    "GetNextRegion" },
 111     { GetNextTuple,                     "GetNextTuple" },
 112     { GetStatus,                        "GetStatus" },
 113     { GetTupleData,                     "GetTupleData" },
 114     { MapMemPage,                       "MapMemPage" },
 115     { ModifyConfiguration,              "ModifyConfiguration" },
 116     { ModifyWindow,                     "ModifyWindow" },
 117     { OpenMemory,                       "OpenMemory" },
 118     { ParseTuple,                       "ParseTuple" },
 119     { ReadMemory,                       "ReadMemory" },
 120     { RegisterClient,                   "RegisterClient" },
 121     { RegisterEraseQueue,               "RegisterEraseQueue" },
 122     { RegisterMTD,                      "RegisterMTD" },
 123     { ReleaseConfiguration,             "ReleaseConfiguration" },
 124     { ReleaseIO,                        "ReleaseIO" },
 125     { ReleaseIRQ,                       "ReleaseIRQ" },
 126     { ReleaseWindow,                    "ReleaseWindow" },
 127     { RequestConfiguration,             "RequestConfiguration" },
 128     { RequestIO,                        "RequestIO" },
 129     { RequestIRQ,                       "RequestIRQ" },
 130     { RequestSocketMask,                "RequestSocketMask" },
 131     { RequestWindow,                    "RequestWindow" },
 132     { ResetCard,                        "ResetCard" },
 133     { SetEventMask,                     "SetEventMask" },
 134     { ValidateCIS,                      "ValidateCIS" },
 135     { WriteMemory,                      "WriteMemory" },
 136     { BindDevice,                       "BindDevice" },
 137     { BindMTD,                          "BindMTD" },
 138     { ReportError,                      "ReportError" },
 139     { SuspendCard,                      "SuspendCard" },
 140     { ResumeCard,                       "ResumeCard" },
 141     { EjectCard,                        "EjectCard" },
 142     { InsertCard,                       "InsertCard" },
 143     { ReplaceCIS,                       "ReplaceCIS" }
 144 };
 145
 146
 147 static int pcmcia_report_error(struct pcmcia_device *p_dev, error_info_t *err)
 148 {
 149         int i;
 150         char *serv;
 151
 152         if (!p_dev)
 153                 printk(KERN_NOTICE);
 154         else
 155                 printk(KERN_NOTICE "%s: ", p_dev->dev.bus_id);
 156
 157         for (i = 0; i < ARRAY_SIZE(service_table); i++)
 158                 if (service_table[i].key == err->func)
 159                         break;
 160         if (i < ARRAY_SIZE(service_table))
 161                 serv = service_table[i].msg;
 162         else
 163                 serv = "Unknown service number";
 164
 165         for (i = 0; i < ARRAY_SIZE(error_table); i++)
 166                 if (error_table[i].key == err->retcode)
 167                         break;
 168         if (i < ARRAY_SIZE(error_table))
 169                 printk("%s: %s\n", serv, error_table[i].msg);
 170         else
 171                 printk("%s: Unknown error code %#x\n", serv, err->retcode);
 172
 173         return 0;
 174 } /* report_error */
 175
 176 /* end of code which was in cs.c before */
 177
 178 /*======================================================================*/
 179
 180 void cs_error(struct pcmcia_device *p_dev, int func, int ret)
 181 {
 182         error_info_t err = { func, ret };
 183         pcmcia_report_error(p_dev, &err);
 184 }
 185 EXPORT_SYMBOL(cs_error);
 186
 187
 188 static void pcmcia_check_driver(struct pcmcia_driver *p_drv)
 189 {
 190         struct pcmcia_device_id *did = p_drv->id_table;
 191         unsigned int i;
 192         u32 hash;
 193
 194         if (!p_drv->probe || !p_drv->remove)
 195                 printk(KERN_DEBUG "pcmcia: %s lacks a requisite callback "
 196                        "function\n", p_drv->drv.name);
 197
 198         while (did && did->match_flags) {
 199                 for (i=0; i<4; i++) {
 200                         if (!did->prod_id[i])
 201                                 continue;
 202
 203                         hash = crc32(0, did->prod_id[i], strlen(did->prod_id[i]));
 204                         if (hash == did->prod_id_hash[i])
 205                                 continue;
 206
 207                         printk(KERN_DEBUG "pcmcia: %s: invalid hash for "
 208                                "product string \"%s\": is 0x%x, should "
 209                                "be 0x%x\n", p_drv->drv.name, did->prod_id[i],
 210                                did->prod_id_hash[i], hash);
 211                         printk(KERN_DEBUG "pcmcia: see "
 212                                 "Documentation/pcmcia/devicetable.txt for "
 213                                 "details\n");
 214                 }
 215                 did++;
 216         }
 217
 218         return;
 219 }
 220
 221
 222 /*======================================================================*/
 223
 224
 225 struct pcmcia_dynid {
 226         struct list_head                node;
 227         struct pcmcia_device_id         id;
 228 };
 229
 230 /**
 231  * pcmcia_store_new_id - add a new PCMCIA device ID to this driver and re-probe devices
 232  * @driver: target device driver
 233  * @buf: buffer for scanning device ID data
 234  * @count: input size
 235  *
 236  * Adds a new dynamic PCMCIA device ID to this driver,
 237  * and causes the driver to probe for all devices again.
 238  */
 239 static ssize_t
 240 pcmcia_store_new_id(struct device_driver *driver, const char *buf, size_t count)
 241 {
 242         struct pcmcia_dynid *dynid;
 243         struct pcmcia_driver *pdrv = to_pcmcia_drv(driver);
 244         __u16 match_flags, manf_id, card_id;
 245         __u8 func_id, function, device_no;
 246         __u32 prod_id_hash[4] = {0, 0, 0, 0};
 247         int fields=0;
 248         int retval = 0;
 249
 250         fields = sscanf(buf, "%hx %hx %hx %hhx %hhx %hhx %x %x %x %x",
 251                         &match_flags, &manf_id, &card_id, &func_id, &function, &device_no,
 252                         &prod_id_hash[0], &prod_id_hash[1], &prod_id_hash[2], &prod_id_hash[3]);
 253         if (fields < 6)
 254                 return -EINVAL;
 255
 256         dynid = kzalloc(sizeof(struct pcmcia_dynid), GFP_KERNEL);
 257         if (!dynid)
 258                 return -ENOMEM;
 259
 260         INIT_LIST_HEAD(&dynid->node);
 261         dynid->id.match_flags = match_flags;
 262         dynid->id.manf_id = manf_id;
 263         dynid->id.card_id = card_id;
 264         dynid->id.func_id = func_id;
 265         dynid->id.function = function;
 266         dynid->id.device_no = device_no;
 267         memcpy(dynid->id.prod_id_hash, prod_id_hash, sizeof(__u32) * 4);
 268
 269         spin_lock(&pdrv->dynids.lock);
 270         list_add_tail(&pdrv->dynids.list, &dynid->node);
 271         spin_unlock(&pdrv->dynids.lock);
 272
 273         if (get_driver(&pdrv->drv)) {
 274                 retval = driver_attach(&pdrv->drv);
 275                 put_driver(&pdrv->drv);
 276         }
 277
 278         if (retval)
 279                 return retval;
 280         return count;
 281 }
 282 static DRIVER_ATTR(new_id, S_IWUSR, NULL, pcmcia_store_new_id);
 283
 284 static void
 285 pcmcia_free_dynids(struct pcmcia_driver *drv)
 286 {
 287         struct pcmcia_dynid *dynid, *n;
 288
 289         spin_lock(&drv->dynids.lock);
 290         list_for_each_entry_safe(dynid, n, &drv->dynids.list, node) {
 291                 list_del(&dynid->node);
 292                 kfree(dynid);
 293         }
 294         spin_unlock(&drv->dynids.lock);
 295 }
 296
 297 static int
 298 pcmcia_create_newid_file(struct pcmcia_driver *drv)
 299 {
 300         int error = 0;
 301         if (drv->probe != NULL)
 302                 error = driver_create_file(&drv->drv, &driver_attr_new_id);
 303         return error;
 304 }
 305
 306
 307 /**
 308  * pcmcia_register_driver - register a PCMCIA driver with the bus core
 309  * @driver: the &driver being registered
 310  *
 311  * Registers a PCMCIA driver with the PCMCIA bus core.
 312  */
 313 int pcmcia_register_driver(struct pcmcia_driver *driver)
 314 {
 315         int error;
 316
 317         if (!driver)
 318                 return -EINVAL;
 319
 320         pcmcia_check_driver(driver);
 321
 322         /* initialize common fields */
 323         driver->drv.bus = &pcmcia_bus_type;
 324         driver->drv.owner = driver->owner;
 325         spin_lock_init(&driver->dynids.lock);
 326         INIT_LIST_HEAD(&driver->dynids.list);
 327
 328         ds_dbg(3, "registering driver %s\n", driver->drv.name);
 329
 330         error = driver_register(&driver->drv);
 331         if (error < 0)
 332                 return error;
 333
 334         error = pcmcia_create_newid_file(driver);
 335         if (error)
 336                 driver_unregister(&driver->drv);
 337
 338         return error;
 339 }
 340 EXPORT_SYMBOL(pcmcia_register_driver);
 341
 342 /**
 343  * pcmcia_unregister_driver - unregister a PCMCIA driver with the bus core
 344  * @driver: the &driver being unregistered
 345  */
 346 void pcmcia_unregister_driver(struct pcmcia_driver *driver)
 347 {
 348         ds_dbg(3, "unregistering driver %s\n", driver->drv.name);
 349         driver_unregister(&driver->drv);
 350         pcmcia_free_dynids(driver);
 351 }
 352 EXPORT_SYMBOL(pcmcia_unregister_driver);
 353
 354
 355 /* pcmcia_device handling */
 356
 357 struct pcmcia_device * pcmcia_get_dev(struct pcmcia_device *p_dev)
 358 {
 359         struct device *tmp_dev;
 360         tmp_dev = get_device(&p_dev->dev);
 361         if (!tmp_dev)
 362                 return NULL;
 363         return to_pcmcia_dev(tmp_dev);
 364 }
 365
 366 void pcmcia_put_dev(struct pcmcia_device *p_dev)
 367 {
 368         if (p_dev)
 369                 put_device(&p_dev->dev);
 370 }
 371
 372 static void pcmcia_release_function(struct kref *ref)
 373 {
 374         struct config_t *c = container_of(ref, struct config_t, ref);
 375         ds_dbg(1, "releasing config_t\n");
 376         kfree(c);
 377 }
 378
 379 static void pcmcia_release_dev(struct device *dev)
 380 {
 381         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 382         ds_dev_dbg(1, dev, "releasing device\n");
 383         pcmcia_put_socket(p_dev->socket);
 384         kfree(p_dev->devname);
 385         kref_put(&p_dev->function_config->ref, pcmcia_release_function);
 386         kfree(p_dev);
 387 }
 388
 389 static void pcmcia_add_device_later(struct pcmcia_socket *s, int mfc)
 390 {
 391         if (!s->pcmcia_state.device_add_pending) {
 392                 ds_dev_dbg(1, &s->dev, "scheduling to add %s secondary"
 393                        " device to %d\n", mfc ? "mfc" : "pfc", s->sock);
 394                 s->pcmcia_state.device_add_pending = 1;
 395                 s->pcmcia_state.mfc_pfc = mfc;
 396                 schedule_work(&s->device_add);
 397         }
 398         return;
 399 }
 400
 401 static int pcmcia_device_probe(struct device * dev)
 402 {
 403         struct pcmcia_device *p_dev;
 404         struct pcmcia_driver *p_drv;
 405         struct pcmcia_device_id *did;
 406         struct pcmcia_socket *s;
 407         cistpl_config_t cis_config;
 408         int ret = 0;
 409
 410         dev = get_device(dev);
 411         if (!dev)
 412                 return -ENODEV;
 413
 414         p_dev = to_pcmcia_dev(dev);
 415         p_drv = to_pcmcia_drv(dev->driver);
 416         s = p_dev->socket;
 417
 418         ds_dev_dbg(1, dev, "trying to bind to %s\n", p_drv->drv.name);
 419
 420         if ((!p_drv->probe) || (!p_dev->function_config) ||
 421             (!try_module_get(p_drv->owner))) {
 422                 ret = -EINVAL;
 423                 goto put_dev;
 424         }
 425
 426         /* set up some more device information */
 427         ret = pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_CONFIG,
 428                                 &cis_config);
 429         if (!ret) {
 430                 p_dev->conf.ConfigBase = cis_config.base;
 431                 p_dev->conf.Present = cis_config.rmask[0];
 432         } else {
 433                 dev_printk(KERN_INFO, dev,
 434                            "pcmcia: could not parse base and rmask0 of CIS\n");
 435                 p_dev->conf.ConfigBase = 0;
 436                 p_dev->conf.Present = 0;
 437         }
 438
 439         ret = p_drv->probe(p_dev);
 440         if (ret) {
 441                 ds_dev_dbg(1, dev, "binding to %s failed with %d\n",
 442                            p_drv->drv.name, ret);
 443                 goto put_module;
 444         }
 445
 446         /* handle pseudo multifunction devices:
 447          * there are at most two pseudo multifunction devices.
 448          * if we're matching against the first, schedule a
 449          * call which will then check whether there are two
 450          * pseudo devices, and if not, add the second one.
 451          */
 452         did = p_dev->dev.driver_data;
 453         if (did && (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) &&
 454             (p_dev->socket->device_count == 1) && (p_dev->device_no == 0))
 455                 pcmcia_add_device_later(p_dev->socket, 0);
 456
 457  put_module:
 458         if (ret)
 459                 module_put(p_drv->owner);
 460  put_dev:
 461         if (ret)
 462                 put_device(dev);
 463         return (ret);
 464 }
 465
 466
 467 /*
 468  * Removes a PCMCIA card from the device tree and socket list.
 469  */
 470 static void pcmcia_card_remove(struct pcmcia_socket *s, struct pcmcia_device *leftover)
 471 {
 472         struct pcmcia_device    *p_dev;
 473         struct pcmcia_device    *tmp;
 474         unsigned long           flags;
 475
 476         ds_dev_dbg(2, leftover ? &leftover->dev : &s->dev,
 477                    "pcmcia_card_remove(%d) %s\n", s->sock,
 478                    leftover ? leftover->devname : "");
 479
 480         if (!leftover)
 481                 s->device_count = 0;
 482         else
 483                 s->device_count = 1;
 484
 485         /* unregister all pcmcia_devices registered with this socket, except leftover */
 486         list_for_each_entry_safe(p_dev, tmp, &s->devices_list, socket_device_list) {
 487                 if (p_dev == leftover)
 488                         continue;
 489
 490                 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 491                 list_del(&p_dev->socket_device_list);
 492                 p_dev->_removed=1;
 493                 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 494
 495                 ds_dev_dbg(2, &p_dev->dev, "unregistering device\n");
 496                 device_unregister(&p_dev->dev);
 497         }
 498
 499         return;
 500 }
 501
 502 static int pcmcia_device_remove(struct device * dev)
 503 {
 504         struct pcmcia_device *p_dev;
 505         struct pcmcia_driver *p_drv;
 506         struct pcmcia_device_id *did;
 507         int i;
 508
 509         p_dev = to_pcmcia_dev(dev);
 510         p_drv = to_pcmcia_drv(dev->driver);
 511
 512         ds_dev_dbg(1, dev, "removing device\n");
 513
 514         /* If we're removing the primary module driving a
 515          * pseudo multi-function card, we need to unbind
 516          * all devices
 517          */
 518         did = p_dev->dev.driver_data;
 519         if (did && (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) &&
 520             (p_dev->socket->device_count != 0) &&
 521             (p_dev->device_no == 0))
 522                 pcmcia_card_remove(p_dev->socket, p_dev);
 523
 524         /* detach the "instance" */
 525         if (!p_drv)
 526                 return 0;
 527
 528         if (p_drv->remove)
 529                 p_drv->remove(p_dev);
 530
 531         p_dev->dev_node = NULL;
 532
 533         /* check for proper unloading */
 534         if (p_dev->_irq || p_dev->_io || p_dev->_locked)
 535                 dev_printk(KERN_INFO, dev,
 536                         "pcmcia: driver %s did not release config properly\n",
 537                         p_drv->drv.name);
 538
 539         for (i = 0; i < MAX_WIN; i++)
 540                 if (p_dev->_win & CLIENT_WIN_REQ(i))
 541                         dev_printk(KERN_INFO, dev,
 542                           "pcmcia: driver %s did not release window properly\n",
 543                            p_drv->drv.name);
 544
 545         /* references from pcmcia_probe_device */
 546         pcmcia_put_dev(p_dev);
 547         module_put(p_drv->owner);
 548
 549         return 0;
 550 }
 551
 552
 553 /*
 554  * pcmcia_device_query -- determine information about a pcmcia device
 555  */
 556 static int pcmcia_device_query(struct pcmcia_device *p_dev)
 557 {
 558         cistpl_manfid_t manf_id;
 559         cistpl_funcid_t func_id;
 560         cistpl_vers_1_t *vers1;
 561         unsigned int i;
 562
 563         vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL);
 564         if (!vers1)
 565                 return -ENOMEM;
 566
 567         if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 568                                CISTPL_MANFID, &manf_id)) {
 569                 p_dev->manf_id = manf_id.manf;
 570                 p_dev->card_id = manf_id.card;
 571                 p_dev->has_manf_id = 1;
 572                 p_dev->has_card_id = 1;
 573         }
 574
 575         if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 576                                CISTPL_FUNCID, &func_id)) {
 577                 p_dev->func_id = func_id.func;
 578                 p_dev->has_func_id = 1;
 579         } else {
 580                 /* rule of thumb: cards with no FUNCID, but with
 581                  * common memory device geometry information, are
 582                  * probably memory cards (from pcmcia-cs) */
 583                 cistpl_device_geo_t *devgeo;
 584
 585                 devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL);
 586                 if (!devgeo) {
 587                         kfree(vers1);
 588                         return -ENOMEM;
 589                 }
 590                 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 591                                       CISTPL_DEVICE_GEO, devgeo)) {
 592                         ds_dev_dbg(0, &p_dev->dev,
 593                                    "mem device geometry probably means "
 594                                    "FUNCID_MEMORY\n");
 595                         p_dev->func_id = CISTPL_FUNCID_MEMORY;
 596                         p_dev->has_func_id = 1;
 597                 }
 598                 kfree(devgeo);
 599         }
 600
 601         if (!pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_VERS_1,
 602                                vers1)) {
 603                 for (i=0; i < vers1->ns; i++) {
 604                         char *tmp;
 605                         unsigned int length;
 606
 607                         tmp = vers1->str + vers1->ofs[i];
 608
 609                         length = strlen(tmp) + 1;
 610                         if ((length < 2) || (length > 255))
 611                                 continue;
 612
 613                         p_dev->prod_id[i] = kmalloc(sizeof(char) * length,
 614                                                     GFP_KERNEL);
 615                         if (!p_dev->prod_id[i])
 616                                 continue;
 617
 618                         p_dev->prod_id[i] = strncpy(p_dev->prod_id[i],
 619                                                     tmp, length);
 620                 }
 621         }
 622
 623         kfree(vers1);
 624         return 0;
 625 }
 626
 627
 628 /* device_add_lock is needed to avoid double registration by cardmgr and kernel.
 629  * Serializes pcmcia_device_add; will most likely be removed in future.
 630  *
 631  * While it has the caveat that adding new PCMCIA devices inside(!) device_register()
 632  * won't work, this doesn't matter much at the moment: the driver core doesn't
 633  * support it either.
 634  */
 635 static DEFINE_MUTEX(device_add_lock);
 636
 637 struct pcmcia_device * pcmcia_device_add(struct pcmcia_socket *s, unsigned int function)
 638 {
 639         struct pcmcia_device *p_dev, *tmp_dev;
 640         unsigned long flags;
 641         int bus_id_len;
 642
 643         s = pcmcia_get_socket(s);
 644         if (!s)
 645                 return NULL;
 646
 647         mutex_lock(&device_add_lock);
 648
 649         ds_dbg(3, "adding device to %d, function %d\n", s->sock, function);
 650
 651         /* max of 4 devices per card */
 652         if (s->device_count == 4)
 653                 goto err_put;
 654
 655         p_dev = kzalloc(sizeof(struct pcmcia_device), GFP_KERNEL);
 656         if (!p_dev)
 657                 goto err_put;
 658
 659         p_dev->socket = s;
 660         p_dev->device_no = (s->device_count++);
 661         p_dev->func   = function;
 662
 663         p_dev->dev.bus = &pcmcia_bus_type;
 664         p_dev->dev.parent = s->dev.parent;
 665         p_dev->dev.release = pcmcia_release_dev;
 666         /* by default don't allow DMA */
 667         p_dev->dma_mask = DMA_MASK_NONE;
 668         p_dev->dev.dma_mask = &p_dev->dma_mask;
 669         bus_id_len = sprintf (p_dev->dev.bus_id, "%d.%d", p_dev->socket->sock, p_dev->device_no);
 670
 671         p_dev->devname = kmalloc(6 + bus_id_len + 1, GFP_KERNEL);
 672         if (!p_dev->devname)
 673                 goto err_free;
 674         sprintf (p_dev->devname, "pcmcia%s", p_dev->dev.bus_id);
 675         ds_dev_dbg(3, &p_dev->dev, "devname is %s\n", p_dev->devname);
 676
 677         spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 678
 679         /*
 680          * p_dev->function_config must be the same for all card functions.
 681          * Note that this is serialized by the device_add_lock, so that
 682          * only one such struct will be created.
 683          */
 684         list_for_each_entry(tmp_dev, &s->devices_list, socket_device_list)
 685                 if (p_dev->func == tmp_dev->func) {
 686                         p_dev->function_config = tmp_dev->function_config;
 687                         kref_get(&p_dev->function_config->ref);
 688                 }
 689
 690         /* Add to the list in pcmcia_bus_socket */
 691         list_add(&p_dev->socket_device_list, &s->devices_list);
 692
 693         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 694
 695         if (!p_dev->function_config) {
 696                 ds_dev_dbg(3, &p_dev->dev, "creating config_t\n");
 697                 p_dev->function_config = kzalloc(sizeof(struct config_t),
 698                                                  GFP_KERNEL);
 699                 if (!p_dev->function_config)
 700                         goto err_unreg;
 701                 kref_init(&p_dev->function_config->ref);
 702         }
 703
 704         dev_printk(KERN_NOTICE, &p_dev->dev,
 705                    "pcmcia: registering new device %s\n",
 706                    p_dev->devname);
 707
 708         pcmcia_device_query(p_dev);
 709
 710         if (device_register(&p_dev->dev))
 711                 goto err_unreg;
 712
 713         mutex_unlock(&device_add_lock);
 714
 715         return p_dev;
 716
 717  err_unreg:
 718         spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 719         list_del(&p_dev->socket_device_list);
 720         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 721
 722  err_free:
 723         kfree(p_dev->devname);
 724         kfree(p_dev);
 725         s->device_count--;
 726  err_put:
 727         mutex_unlock(&device_add_lock);
 728         pcmcia_put_socket(s);
 729
 730         return NULL;
 731 }
 732
 733
 734 static int pcmcia_card_add(struct pcmcia_socket *s)
 735 {
 736         cistpl_longlink_mfc_t mfc;
 737         unsigned int no_funcs, i, no_chains;
 738         int ret = 0;
 739
 740         if (!(s->resource_setup_done)) {
 741                 ds_dev_dbg(3, &s->dev,
 742                            "no resources available, delaying card_add\n");
 743                 return -EAGAIN; /* try again, but later... */
 744         }
 745
 746         if (pcmcia_validate_mem(s)) {
 747                 ds_dev_dbg(3, &s->dev, "validating mem resources failed, "
 748                        "delaying card_add\n");
 749                 return -EAGAIN; /* try again, but later... */
 750         }
 751
 752         ret = pccard_validate_cis(s, BIND_FN_ALL, &no_chains);
 753         if (ret || !no_chains) {
 754                 ds_dev_dbg(0, &s->dev, "invalid CIS or invalid resources\n");
 755                 return -ENODEV;
 756         }
 757
 758         if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
 759                 no_funcs = mfc.nfn;
 760         else
 761                 no_funcs = 1;
 762         s->functions = no_funcs;
 763
 764         for (i=0; i < no_funcs; i++)
 765                 pcmcia_device_add(s, i);
 766
 767         return (ret);
 768 }
 769
 770
 771 static void pcmcia_delayed_add_device(struct work_struct *work)
 772 {
 773         struct pcmcia_socket *s =
 774                 container_of(work, struct pcmcia_socket, device_add);
 775         ds_dev_dbg(1, &s->dev, "adding additional device to %d\n", s->sock);
 776         pcmcia_device_add(s, s->pcmcia_state.mfc_pfc);
 777         s->pcmcia_state.device_add_pending = 0;
 778         s->pcmcia_state.mfc_pfc = 0;
 779 }
 780
 781 static int pcmcia_requery(struct device *dev, void * _data)
 782 {
 783         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 784         if (!p_dev->dev.driver) {
 785                 ds_dev_dbg(1, dev, "update device information\n");
 786                 pcmcia_device_query(p_dev);
 787         }
 788
 789         return 0;
 790 }
 791
 792 static void pcmcia_bus_rescan(struct pcmcia_socket *skt, int new_cis)
 793 {
 794         int no_devices = 0;
 795         int ret = 0;
 796         unsigned long flags;
 797
 798         /* must be called with skt_mutex held */
 799         ds_dev_dbg(0, &skt->dev, "re-scanning socket %d\n", skt->sock);
 800
 801         spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 802         if (list_empty(&skt->devices_list))
 803                 no_devices = 1;
 804         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 805
 806         /* If this is because of a CIS override, start over */
 807         if (new_cis && !no_devices)
 808                 pcmcia_card_remove(skt, NULL);
 809
 810         /* if no devices were added for this socket yet because of
 811          * missing resource information or other trouble, we need to
 812          * do this now. */
 813         if (no_devices || new_cis) {
 814                 ret = pcmcia_card_add(skt);
 815                 if (ret)
 816                         return;
 817         }
 818
 819         /* some device information might have changed because of a CIS
 820          * update or because we can finally read it correctly... so
 821          * determine it again, overwriting old values if necessary. */
 822         bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery);
 823
 824         /* we re-scan all devices, not just the ones connected to this
 825          * socket. This does not matter, though. */
 826         ret = bus_rescan_devices(&pcmcia_bus_type);
 827         if (ret)
 828                 printk(KERN_INFO "pcmcia: bus_rescan_devices failed\n");
 829 }
 830
 831 #ifdef CONFIG_PCMCIA_LOAD_CIS
 832
 833 /**
 834  * pcmcia_load_firmware - load CIS from userspace if device-provided is broken
 835  * @dev: the pcmcia device which needs a CIS override
 836  * @filename: requested filename in /lib/firmware/
 837  *
 838  * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if
 839  * the one provided by the card is broken. The firmware files reside in
 840  * /lib/firmware/ in userspace.
 841  */
 842 static int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
 843 {
 844         struct pcmcia_socket *s = dev->socket;
 845         const struct firmware *fw;
 846         char path[FIRMWARE_NAME_MAX];
 847         int ret = -ENOMEM;
 848         int no_funcs;
 849         int old_funcs;
 850         cistpl_longlink_mfc_t mfc;
 851
 852         if (!filename)
 853                 return -EINVAL;
 854
 855         ds_dev_dbg(1, &dev->dev, "trying to load CIS file %s\n", filename);
 856
 857         if (strlen(filename) > (FIRMWARE_NAME_MAX - 1)) {
 858                 dev_printk(KERN_WARNING, &dev->dev,
 859                            "pcmcia: CIS filename is too long [%s]\n",
 860                            filename);
 861                 return -EINVAL;
 862         }
 863
 864         snprintf(path, sizeof(path), "%s", filename);
 865
 866         if (request_firmware(&fw, path, &dev->dev) == 0) {
 867                 if (fw->size >= CISTPL_MAX_CIS_SIZE) {
 868                         ret = -EINVAL;
 869                         dev_printk(KERN_ERR, &dev->dev,
 870                                    "pcmcia: CIS override is too big\n");
 871                         goto release;
 872                 }
 873
 874                 if (!pcmcia_replace_cis(s, fw->data, fw->size))
 875                         ret = 0;
 876                 else {
 877                         dev_printk(KERN_ERR, &dev->dev,
 878                                    "pcmcia: CIS override failed\n");
 879                         goto release;
 880                 }
 881
 882
 883                 /* update information */
 884                 pcmcia_device_query(dev);
 885
 886                 /* does this cis override add or remove functions? */
 887                 old_funcs = s->functions;
 888
 889                 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
 890                         no_funcs = mfc.nfn;
 891                 else
 892                         no_funcs = 1;
 893                 s->functions = no_funcs;
 894
 895                 if (old_funcs > no_funcs)
 896                         pcmcia_card_remove(s, dev);
 897                 else if (no_funcs > old_funcs)
 898                         pcmcia_add_device_later(s, 1);
 899         }
 900  release:
 901         release_firmware(fw);
 902
 903         return (ret);
 904 }
 905
 906 #else /* !CONFIG_PCMCIA_LOAD_CIS */
 907
 908 static inline int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
 909 {
 910         return -ENODEV;
 911 }
 912
 913 #endif
 914
 915
 916 static inline int pcmcia_devmatch(struct pcmcia_device *dev,
 917                                   struct pcmcia_device_id *did)
 918 {
 919         if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
 920                 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
 921                         return 0;
 922         }
 923
 924         if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
 925                 if ((!dev->has_card_id) || (dev->card_id != did->card_id))
 926                         return 0;
 927         }
 928
 929         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
 930                 if (dev->func != did->function)
 931                         return 0;
 932         }
 933
 934         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
 935                 if (!dev->prod_id[0])
 936                         return 0;
 937                 if (strcmp(did->prod_id[0], dev->prod_id[0]))
 938                         return 0;
 939         }
 940
 941         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
 942                 if (!dev->prod_id[1])
 943                         return 0;
 944                 if (strcmp(did->prod_id[1], dev->prod_id[1]))
 945                         return 0;
 946         }
 947
 948         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
 949                 if (!dev->prod_id[2])
 950                         return 0;
 951                 if (strcmp(did->prod_id[2], dev->prod_id[2]))
 952                         return 0;
 953         }
 954
 955         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
 956                 if (!dev->prod_id[3])
 957                         return 0;
 958                 if (strcmp(did->prod_id[3], dev->prod_id[3]))
 959                         return 0;
 960         }
 961
 962         if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
 963                 if (dev->device_no != did->device_no)
 964                         return 0;
 965         }
 966
 967         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
 968                 if ((!dev->has_func_id) || (dev->func_id != did->func_id))
 969                         return 0;
 970
 971                 /* if this is a pseudo-multi-function device,
 972                  * we need explicit matches */
 973                 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO)
 974                         return 0;
 975                 if (dev->device_no)
 976                         return 0;
 977
 978                 /* also, FUNC_ID matching needs to be activated by userspace
 979                  * after it has re-checked that there is no possible module
 980                  * with a prod_id/manf_id/card_id match.
 981                  */
 982                 ds_dev_dbg(0, &dev->dev,
 983                         "skipping FUNC_ID match until userspace interaction\n");
 984                 if (!dev->allow_func_id_match)
 985                         return 0;
 986         }
 987
 988         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
 989                 ds_dev_dbg(0, &dev->dev, "device needs a fake CIS\n");
 990                 if (!dev->socket->fake_cis)
 991                         pcmcia_load_firmware(dev, did->cisfile);
 992
 993                 if (!dev->socket->fake_cis)
 994                         return 0;
 995         }
 996
 997         if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
 998                 int i;
 999                 for (i=0; i<4; i++)
1000                         if (dev->prod_id[i])
1001                                 return 0;
1002                 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
1003                         return 0;
1004         }
1005
1006         dev->dev.driver_data = (void *) did;
1007
1008         return 1;
1009 }
1010
1011
1012 static int pcmcia_bus_match(struct device * dev, struct device_driver * drv) {
1013         struct pcmcia_device * p_dev = to_pcmcia_dev(dev);
1014         struct pcmcia_driver * p_drv = to_pcmcia_drv(drv);
1015         struct pcmcia_device_id *did = p_drv->id_table;
1016         struct pcmcia_dynid *dynid;
1017
1018         /* match dynamic devices first */
1019         spin_lock(&p_drv->dynids.lock);
1020         list_for_each_entry(dynid, &p_drv->dynids.list, node) {
1021                 ds_dev_dbg(3, dev, "trying to match to %s\n", drv->name);
1022                 if (pcmcia_devmatch(p_dev, &dynid->id)) {
1023                         ds_dev_dbg(0, dev, "matched to %s\n", drv->name);
1024                         spin_unlock(&p_drv->dynids.lock);
1025                         return 1;
1026                 }
1027         }
1028         spin_unlock(&p_drv->dynids.lock);
1029
1030 #ifdef CONFIG_PCMCIA_IOCTL
1031         /* matching by cardmgr */
1032         if (p_dev->cardmgr == p_drv) {
1033                 ds_dev_dbg(0, dev, "cardmgr matched to %s\n", drv->name);
1034                 return 1;
1035         }
1036 #endif
1037
1038         while (did && did->match_flags) {
1039                 ds_dev_dbg(3, dev, "trying to match to %s\n", drv->name);
1040                 if (pcmcia_devmatch(p_dev, did)) {
1041                         ds_dev_dbg(0, dev, "matched to %s\n", drv->name);
1042                         return 1;
1043                 }
1044                 did++;
1045         }
1046
1047         return 0;
1048 }
1049
1050 #ifdef CONFIG_HOTPLUG
1051
1052 static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
1053 {
1054         struct pcmcia_device *p_dev;
1055         int i;
1056         u32 hash[4] = { 0, 0, 0, 0};
1057
1058         if (!dev)
1059                 return -ENODEV;
1060
1061         p_dev = to_pcmcia_dev(dev);
1062
1063         /* calculate hashes */
1064         for (i=0; i<4; i++) {
1065                 if (!p_dev->prod_id[i])
1066                         continue;
1067                 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
1068         }
1069
1070         if (add_uevent_var(env, "SOCKET_NO=%u", p_dev->socket->sock))
1071                 return -ENOMEM;
1072
1073         if (add_uevent_var(env, "DEVICE_NO=%02X", p_dev->device_no))
1074                 return -ENOMEM;
1075
1076         if (add_uevent_var(env, "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
1077                            "pa%08Xpb%08Xpc%08Xpd%08X",
1078                            p_dev->has_manf_id ? p_dev->manf_id : 0,
1079                            p_dev->has_card_id ? p_dev->card_id : 0,
1080                            p_dev->has_func_id ? p_dev->func_id : 0,
1081                            p_dev->func,
1082                            p_dev->device_no,
1083                            hash[0],
1084                            hash[1],
1085                            hash[2],
1086                            hash[3]))
1087                 return -ENOMEM;
1088
1089         return 0;
1090 }
1091
1092 #else
1093
1094 static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
1095 {
1096         return -ENODEV;
1097 }
1098
1099 #endif
1100
1101 /************************ runtime PM support ***************************/
1102
1103 static int pcmcia_dev_suspend(struct device *dev, pm_message_t state);
1104 static int pcmcia_dev_resume(struct device *dev);
1105
1106 static int runtime_suspend(struct device *dev)
1107 {
1108         int rc;
1109
1110         down(&dev->sem);
1111         rc = pcmcia_dev_suspend(dev, PMSG_SUSPEND);
1112         up(&dev->sem);
1113         return rc;
1114 }
1115
1116 static void runtime_resume(struct device *dev)
1117 {
1118         int rc;
1119
1120         down(&dev->sem);
1121         rc = pcmcia_dev_resume(dev);
1122         up(&dev->sem);
1123 }
1124
1125 /************************ per-device sysfs output ***************************/
1126
1127 #define pcmcia_device_attr(field, test, format)                         \
1128 static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf)              \
1129 {                                                                       \
1130         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);               \
1131         return p_dev->test ? sprintf (buf, format, p_dev->field) : -ENODEV; \
1132 }
1133
1134 #define pcmcia_device_stringattr(name, field)                                   \
1135 static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf)               \
1136 {                                                                       \
1137         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);               \
1138         return p_dev->field ? sprintf (buf, "%s\n", p_dev->field) : -ENODEV; \
1139 }
1140
1141 pcmcia_device_attr(func, socket, "0x%02x\n");
1142 pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
1143 pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
1144 pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
1145 pcmcia_device_stringattr(prod_id1, prod_id[0]);
1146 pcmcia_device_stringattr(prod_id2, prod_id[1]);
1147 pcmcia_device_stringattr(prod_id3, prod_id[2]);
1148 pcmcia_device_stringattr(prod_id4, prod_id[3]);
1149
1150
1151 static ssize_t pcmcia_show_pm_state(struct device *dev, struct device_attribute *attr, char *buf)
1152 {
1153         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1154
1155         if (p_dev->suspended)
1156                 return sprintf(buf, "off\n");
1157         else
1158                 return sprintf(buf, "on\n");
1159 }
1160
1161 static ssize_t pcmcia_store_pm_state(struct device *dev, struct device_attribute *attr,
1162                                      const char *buf, size_t count)
1163 {
1164         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1165         int ret = 0;
1166
1167         if (!count)
1168                 return -EINVAL;
1169
1170         if ((!p_dev->suspended) && !strncmp(buf, "off", 3))
1171                 ret = runtime_suspend(dev);
1172         else if (p_dev->suspended && !strncmp(buf, "on", 2))
1173                 runtime_resume(dev);
1174
1175         return ret ? ret : count;
1176 }
1177
1178
1179 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1180 {
1181         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1182         int i;
1183         u32 hash[4] = { 0, 0, 0, 0};
1184
1185         /* calculate hashes */
1186         for (i=0; i<4; i++) {
1187                 if (!p_dev->prod_id[i])
1188                         continue;
1189                 hash[i] = crc32(0,p_dev->prod_id[i],strlen(p_dev->prod_id[i]));
1190         }
1191         return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
1192                                 "pa%08Xpb%08Xpc%08Xpd%08X\n",
1193                                 p_dev->has_manf_id ? p_dev->manf_id : 0,
1194                                 p_dev->has_card_id ? p_dev->card_id : 0,
1195                                 p_dev->has_func_id ? p_dev->func_id : 0,
1196                                 p_dev->func, p_dev->device_no,
1197                                 hash[0], hash[1], hash[2], hash[3]);
1198 }
1199
1200 static ssize_t pcmcia_store_allow_func_id_match(struct device *dev,
1201                 struct device_attribute *attr, const char *buf, size_t count)
1202 {
1203         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1204         int ret;
1205
1206         if (!count)
1207                 return -EINVAL;
1208
1209         mutex_lock(&p_dev->socket->skt_mutex);
1210         p_dev->allow_func_id_match = 1;
1211         mutex_unlock(&p_dev->socket->skt_mutex);
1212
1213         ret = bus_rescan_devices(&pcmcia_bus_type);
1214         if (ret)
1215                 printk(KERN_INFO "pcmcia: bus_rescan_devices failed after "
1216                        "allowing func_id matches\n");
1217
1218         return count;
1219 }
1220
1221 static struct device_attribute pcmcia_dev_attrs[] = {
1222         __ATTR(function, 0444, func_show, NULL),
1223         __ATTR(pm_state, 0644, pcmcia_show_pm_state, pcmcia_store_pm_state),
1224         __ATTR_RO(func_id),
1225         __ATTR_RO(manf_id),
1226         __ATTR_RO(card_id),
1227         __ATTR_RO(prod_id1),
1228         __ATTR_RO(prod_id2),
1229         __ATTR_RO(prod_id3),
1230         __ATTR_RO(prod_id4),
1231         __ATTR_RO(modalias),
1232         __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match),
1233         __ATTR_NULL,
1234 };
1235
1236 /* PM support, also needed for reset */
1237
1238 static int pcmcia_dev_suspend(struct device * dev, pm_message_t state)
1239 {
1240         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1241         struct pcmcia_driver *p_drv = NULL;
1242         int ret = 0;
1243
1244         if (p_dev->suspended)
1245                 return 0;
1246
1247         ds_dev_dbg(2, dev, "suspending\n");
1248
1249         if (dev->driver)
1250                 p_drv = to_pcmcia_drv(dev->driver);
1251
1252         if (!p_drv)
1253                 goto out;
1254
1255         if (p_drv->suspend) {
1256                 ret = p_drv->suspend(p_dev);
1257                 if (ret) {
1258                         dev_printk(KERN_ERR, dev,
1259                                    "pcmcia: device %s (driver %s) did "
1260                                    "not want to go to sleep (%d)\n",
1261                                    p_dev->devname, p_drv->drv.name, ret);
1262                         goto out;
1263                 }
1264         }
1265
1266         if (p_dev->device_no == p_dev->func) {
1267                 ds_dev_dbg(2, dev, "releasing configuration\n");
1268                 pcmcia_release_configuration(p_dev);
1269         }
1270
1271  out:
1272         if (!ret)
1273                 p_dev->suspended = 1;
1274         return ret;
1275 }
1276
1277
1278 static int pcmcia_dev_resume(struct device * dev)
1279 {
1280         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1281         struct pcmcia_driver *p_drv = NULL;
1282         int ret = 0;
1283
1284         if (!p_dev->suspended)
1285                 return 0;
1286
1287         ds_dev_dbg(2, dev, "resuming\n");
1288
1289         if (dev->driver)
1290                 p_drv = to_pcmcia_drv(dev->driver);
1291
1292         if (!p_drv)
1293                 goto out;
1294
1295         if (p_dev->device_no == p_dev->func) {
1296                 ds_dev_dbg(2, dev, "requesting configuration\n");
1297                 ret = pcmcia_request_configuration(p_dev, &p_dev->conf);
1298                 if (ret)
1299                         goto out;
1300         }
1301
1302         if (p_drv->resume)
1303                 ret = p_drv->resume(p_dev);
1304
1305  out:
1306         if (!ret)
1307                 p_dev->suspended = 0;
1308         return ret;
1309 }
1310
1311
1312 static int pcmcia_bus_suspend_callback(struct device *dev, void * _data)
1313 {
1314         struct pcmcia_socket *skt = _data;
1315         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1316
1317         if (p_dev->socket != skt || p_dev->suspended)
1318                 return 0;
1319
1320         return runtime_suspend(dev);
1321 }
1322
1323 static int pcmcia_bus_resume_callback(struct device *dev, void * _data)
1324 {
1325         struct pcmcia_socket *skt = _data;
1326         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1327
1328         if (p_dev->socket != skt || !p_dev->suspended)
1329                 return 0;
1330
1331         runtime_resume(dev);
1332
1333         return 0;
1334 }
1335
1336 static int pcmcia_bus_resume(struct pcmcia_socket *skt)
1337 {
1338         ds_dev_dbg(2, &skt->dev, "resuming socket %d\n", skt->sock);
1339         bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback);
1340         return 0;
1341 }
1342
1343 static int pcmcia_bus_suspend(struct pcmcia_socket *skt)
1344 {
1345         ds_dev_dbg(2, &skt->dev, "suspending socket %d\n", skt->sock);
1346         if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt,
1347                              pcmcia_bus_suspend_callback)) {
1348                 pcmcia_bus_resume(skt);
1349                 return -EIO;
1350         }
1351         return 0;
1352 }
1353
1354
1355 /*======================================================================
1356
1357     The card status event handler.
1358
1359 ======================================================================*/
1360
1361 /* Normally, the event is passed to individual drivers after
1362  * informing userspace. Only for CS_EVENT_CARD_REMOVAL this
1363  * is inversed to maintain historic compatibility.
1364  */
1365
1366 static int ds_event(struct pcmcia_socket *skt, event_t event, int priority)
1367 {
1368         struct pcmcia_socket *s = pcmcia_get_socket(skt);
1369
1370         if (!s) {
1371                 dev_printk(KERN_ERR, &skt->dev,
1372                            "PCMCIA obtaining reference to socket "      \
1373                            "failed, event 0x%x lost!\n", event);
1374                 return -ENODEV;
1375         }
1376
1377         ds_dev_dbg(1, &skt->dev, "ds_event(0x%06x, %d, 0x%p)\n",
1378                    event, priority, skt);
1379
1380         switch (event) {
1381         case CS_EVENT_CARD_REMOVAL:
1382                 s->pcmcia_state.present = 0;
1383                 pcmcia_card_remove(skt, NULL);
1384                 handle_event(skt, event);
1385                 break;
1386
1387         case CS_EVENT_CARD_INSERTION:
1388                 s->pcmcia_state.present = 1;
1389                 pcmcia_card_add(skt);
1390                 handle_event(skt, event);
1391                 break;
1392
1393         case CS_EVENT_EJECTION_REQUEST:
1394                 break;
1395
1396         case CS_EVENT_PM_SUSPEND:
1397         case CS_EVENT_PM_RESUME:
1398         case CS_EVENT_RESET_PHYSICAL:
1399         case CS_EVENT_CARD_RESET:
1400         default:
1401                 handle_event(skt, event);
1402                 break;
1403     }
1404
1405     pcmcia_put_socket(s);
1406
1407     return 0;
1408 } /* ds_event */
1409
1410
1411 struct pcmcia_device * pcmcia_dev_present(struct pcmcia_device *_p_dev)
1412 {
1413         struct pcmcia_device *p_dev;
1414         struct pcmcia_device *ret = NULL;
1415
1416         p_dev = pcmcia_get_dev(_p_dev);
1417         if (!p_dev)
1418                 return NULL;
1419
1420         if (!p_dev->socket->pcmcia_state.present)
1421                 goto out;
1422
1423         if (p_dev->_removed)
1424                 goto out;
1425
1426         if (p_dev->suspended)
1427                 goto out;
1428
1429         ret = p_dev;
1430  out:
1431         pcmcia_put_dev(p_dev);
1432         return ret;
1433 }
1434 EXPORT_SYMBOL(pcmcia_dev_present);
1435
1436
1437 static struct pcmcia_callback pcmcia_bus_callback = {
1438         .owner = THIS_MODULE,
1439         .event = ds_event,
1440         .requery = pcmcia_bus_rescan,
1441         .suspend = pcmcia_bus_suspend,
1442         .resume = pcmcia_bus_resume,
1443 };
1444
1445 static int __devinit pcmcia_bus_add_socket(struct device *dev,
1446                                            struct class_interface *class_intf)
1447 {
1448         struct pcmcia_socket *socket = dev_get_drvdata(dev);
1449         int ret;
1450
1451         socket = pcmcia_get_socket(socket);
1452         if (!socket) {
1453                 dev_printk(KERN_ERR, dev,
1454                            "PCMCIA obtaining reference to socket failed\n");
1455                 return -ENODEV;
1456         }
1457
1458         /*
1459          * Ugly. But we want to wait for the socket threads to have started up.
1460          * We really should let the drivers themselves drive some of this..
1461          */
1462         msleep(250);
1463
1464 #ifdef CONFIG_PCMCIA_IOCTL
1465         init_waitqueue_head(&socket->queue);
1466 #endif
1467         INIT_LIST_HEAD(&socket->devices_list);
1468         INIT_WORK(&socket->device_add, pcmcia_delayed_add_device);
1469         memset(&socket->pcmcia_state, 0, sizeof(u8));
1470         socket->device_count = 0;
1471
1472         ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback);
1473         if (ret) {
1474                 dev_printk(KERN_ERR, dev, "PCMCIA registration failed\n");
1475                 pcmcia_put_socket(socket);
1476                 return (ret);
1477         }
1478
1479         return 0;
1480 }
1481
1482 static void pcmcia_bus_remove_socket(struct device *dev,
1483                                      struct class_interface *class_intf)
1484 {
1485         struct pcmcia_socket *socket = dev_get_drvdata(dev);
1486
1487         if (!socket)
1488                 return;
1489
1490         socket->pcmcia_state.dead = 1;
1491         pccard_register_pcmcia(socket, NULL);
1492
1493         /* unregister any unbound devices */
1494         mutex_lock(&socket->skt_mutex);
1495         pcmcia_card_remove(socket, NULL);
1496         mutex_unlock(&socket->skt_mutex);
1497
1498         pcmcia_put_socket(socket);
1499
1500         return;
1501 }
1502
1503
1504 /* the pcmcia_bus_interface is used to handle pcmcia socket devices */
1505 static struct class_interface pcmcia_bus_interface __refdata = {
1506         .class = &pcmcia_socket_class,
1507         .add_dev = &pcmcia_bus_add_socket,
1508         .remove_dev = &pcmcia_bus_remove_socket,
1509 };
1510
1511
1512 struct bus_type pcmcia_bus_type = {
1513         .name = "pcmcia",
1514         .uevent = pcmcia_bus_uevent,
1515         .match = pcmcia_bus_match,
1516         .dev_attrs = pcmcia_dev_attrs,
1517         .probe = pcmcia_device_probe,
1518         .remove = pcmcia_device_remove,
1519         .suspend = pcmcia_dev_suspend,
1520         .resume = pcmcia_dev_resume,
1521 };
1522
1523
1524 static int __init init_pcmcia_bus(void)
1525 {
1526         int ret;
1527
1528         spin_lock_init(&pcmcia_dev_list_lock);
1529
1530         ret = bus_register(&pcmcia_bus_type);
1531         if (ret < 0) {
1532                 printk(KERN_WARNING "pcmcia: bus_register error: %d\n", ret);
1533                 return ret;
1534         }
1535         ret = class_interface_register(&pcmcia_bus_interface);
1536         if (ret < 0) {
1537                 printk(KERN_WARNING
1538                         "pcmcia: class_interface_register error: %d\n", ret);
1539                 bus_unregister(&pcmcia_bus_type);
1540                 return ret;
1541         }
1542
1543         pcmcia_setup_ioctl();
1544
1545         return 0;
1546 }
1547 fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that
1548                                * pcmcia_socket_class is already registered */
1549
1550
1551 static void __exit exit_pcmcia_bus(void)
1552 {
1553         pcmcia_cleanup_ioctl();
1554
1555         class_interface_unregister(&pcmcia_bus_interface);
1556
1557         bus_unregister(&pcmcia_bus_type);
1558 }
1559 module_exit(exit_pcmcia_bus);
1560
1561
1562 MODULE_ALIAS("ds");