SAFE public projects git trees. - safe/jmp/linux-2.6/blob - 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
  27 #define IN_CARD_SERVICES
  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 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 #else
  55 #define ds_dbg(lvl, fmt, arg...) do { } while (0)
  56 #endif
  57
  58 spinlock_t pcmcia_dev_list_lock;
  59
  60 /*====================================================================*/
  61
  62 /* code which was in cs.c before */
  63
  64 /* String tables for error messages */
  65
  66 typedef struct lookup_t {
  67     int key;
  68     char *msg;
  69 } lookup_t;
  70
  71 static const lookup_t error_table[] = {
  72     { CS_SUCCESS,               "Operation succeeded" },
  73     { CS_BAD_ADAPTER,           "Bad adapter" },
  74     { CS_BAD_ATTRIBUTE,         "Bad attribute", },
  75     { CS_BAD_BASE,              "Bad base address" },
  76     { CS_BAD_EDC,               "Bad EDC" },
  77     { CS_BAD_IRQ,               "Bad IRQ" },
  78     { CS_BAD_OFFSET,            "Bad offset" },
  79     { CS_BAD_PAGE,              "Bad page number" },
  80     { CS_READ_FAILURE,          "Read failure" },
  81     { CS_BAD_SIZE,              "Bad size" },
  82     { CS_BAD_SOCKET,            "Bad socket" },
  83     { CS_BAD_TYPE,              "Bad type" },
  84     { CS_BAD_VCC,               "Bad Vcc" },
  85     { CS_BAD_VPP,               "Bad Vpp" },
  86     { CS_BAD_WINDOW,            "Bad window" },
  87     { CS_WRITE_FAILURE,         "Write failure" },
  88     { CS_NO_CARD,               "No card present" },
  89     { CS_UNSUPPORTED_FUNCTION,  "Usupported function" },
  90     { CS_UNSUPPORTED_MODE,      "Unsupported mode" },
  91     { CS_BAD_SPEED,             "Bad speed" },
  92     { CS_BUSY,                  "Resource busy" },
  93     { CS_GENERAL_FAILURE,       "General failure" },
  94     { CS_WRITE_PROTECTED,       "Write protected" },
  95     { CS_BAD_ARG_LENGTH,        "Bad argument length" },
  96     { CS_BAD_ARGS,              "Bad arguments" },
  97     { CS_CONFIGURATION_LOCKED,  "Configuration locked" },
  98     { CS_IN_USE,                "Resource in use" },
  99     { CS_NO_MORE_ITEMS,         "No more items" },
 100     { CS_OUT_OF_RESOURCE,       "Out of resource" },
 101     { CS_BAD_HANDLE,            "Bad handle" },
 102     { CS_BAD_TUPLE,             "Bad CIS tuple" }
 103 };
 104
 105
 106 static const lookup_t service_table[] = {
 107     { AccessConfigurationRegister,      "AccessConfigurationRegister" },
 108     { AddSocketServices,                "AddSocketServices" },
 109     { AdjustResourceInfo,               "AdjustResourceInfo" },
 110     { CheckEraseQueue,                  "CheckEraseQueue" },
 111     { CloseMemory,                      "CloseMemory" },
 112     { DeregisterClient,                 "DeregisterClient" },
 113     { DeregisterEraseQueue,             "DeregisterEraseQueue" },
 114     { GetCardServicesInfo,              "GetCardServicesInfo" },
 115     { GetClientInfo,                    "GetClientInfo" },
 116     { GetConfigurationInfo,             "GetConfigurationInfo" },
 117     { GetEventMask,                     "GetEventMask" },
 118     { GetFirstClient,                   "GetFirstClient" },
 119     { GetFirstRegion,                   "GetFirstRegion" },
 120     { GetFirstTuple,                    "GetFirstTuple" },
 121     { GetNextClient,                    "GetNextClient" },
 122     { GetNextRegion,                    "GetNextRegion" },
 123     { GetNextTuple,                     "GetNextTuple" },
 124     { GetStatus,                        "GetStatus" },
 125     { GetTupleData,                     "GetTupleData" },
 126     { MapMemPage,                       "MapMemPage" },
 127     { ModifyConfiguration,              "ModifyConfiguration" },
 128     { ModifyWindow,                     "ModifyWindow" },
 129     { OpenMemory,                       "OpenMemory" },
 130     { ParseTuple,                       "ParseTuple" },
 131     { ReadMemory,                       "ReadMemory" },
 132     { RegisterClient,                   "RegisterClient" },
 133     { RegisterEraseQueue,               "RegisterEraseQueue" },
 134     { RegisterMTD,                      "RegisterMTD" },
 135     { ReleaseConfiguration,             "ReleaseConfiguration" },
 136     { ReleaseIO,                        "ReleaseIO" },
 137     { ReleaseIRQ,                       "ReleaseIRQ" },
 138     { ReleaseWindow,                    "ReleaseWindow" },
 139     { RequestConfiguration,             "RequestConfiguration" },
 140     { RequestIO,                        "RequestIO" },
 141     { RequestIRQ,                       "RequestIRQ" },
 142     { RequestSocketMask,                "RequestSocketMask" },
 143     { RequestWindow,                    "RequestWindow" },
 144     { ResetCard,                        "ResetCard" },
 145     { SetEventMask,                     "SetEventMask" },
 146     { ValidateCIS,                      "ValidateCIS" },
 147     { WriteMemory,                      "WriteMemory" },
 148     { BindDevice,                       "BindDevice" },
 149     { BindMTD,                          "BindMTD" },
 150     { ReportError,                      "ReportError" },
 151     { SuspendCard,                      "SuspendCard" },
 152     { ResumeCard,                       "ResumeCard" },
 153     { EjectCard,                        "EjectCard" },
 154     { InsertCard,                       "InsertCard" },
 155     { ReplaceCIS,                       "ReplaceCIS" }
 156 };
 157
 158
 159 static int pcmcia_report_error(struct pcmcia_device *p_dev, error_info_t *err)
 160 {
 161         int i;
 162         char *serv;
 163
 164         if (!p_dev)
 165                 printk(KERN_NOTICE);
 166         else
 167                 printk(KERN_NOTICE "%s: ", p_dev->dev.bus_id);
 168
 169         for (i = 0; i < ARRAY_SIZE(service_table); i++)
 170                 if (service_table[i].key == err->func)
 171                         break;
 172         if (i < ARRAY_SIZE(service_table))
 173                 serv = service_table[i].msg;
 174         else
 175                 serv = "Unknown service number";
 176
 177         for (i = 0; i < ARRAY_SIZE(error_table); i++)
 178                 if (error_table[i].key == err->retcode)
 179                         break;
 180         if (i < ARRAY_SIZE(error_table))
 181                 printk("%s: %s\n", serv, error_table[i].msg);
 182         else
 183                 printk("%s: Unknown error code %#x\n", serv, err->retcode);
 184
 185         return CS_SUCCESS;
 186 } /* report_error */
 187
 188 /* end of code which was in cs.c before */
 189
 190 /*======================================================================*/
 191
 192 void cs_error(struct pcmcia_device *p_dev, int func, int ret)
 193 {
 194         error_info_t err = { func, ret };
 195         pcmcia_report_error(p_dev, &err);
 196 }
 197 EXPORT_SYMBOL(cs_error);
 198
 199
 200 static void pcmcia_check_driver(struct pcmcia_driver *p_drv)
 201 {
 202         struct pcmcia_device_id *did = p_drv->id_table;
 203         unsigned int i;
 204         u32 hash;
 205
 206         if (!p_drv->probe || !p_drv->remove)
 207                 printk(KERN_DEBUG "pcmcia: %s lacks a requisite callback "
 208                        "function\n", p_drv->drv.name);
 209
 210         while (did && did->match_flags) {
 211                 for (i=0; i<4; i++) {
 212                         if (!did->prod_id[i])
 213                                 continue;
 214
 215                         hash = crc32(0, did->prod_id[i], strlen(did->prod_id[i]));
 216                         if (hash == did->prod_id_hash[i])
 217                                 continue;
 218
 219                         printk(KERN_DEBUG "pcmcia: %s: invalid hash for "
 220                                "product string \"%s\": is 0x%x, should "
 221                                "be 0x%x\n", p_drv->drv.name, did->prod_id[i],
 222                                did->prod_id_hash[i], hash);
 223                         printk(KERN_DEBUG "pcmcia: see "
 224                                 "Documentation/pcmcia/devicetable.txt for "
 225                                 "details\n");
 226                 }
 227                 did++;
 228         }
 229
 230         return;
 231 }
 232
 233
 234 #ifdef CONFIG_PCMCIA_LOAD_CIS
 235
 236 /**
 237  * pcmcia_load_firmware - load CIS from userspace if device-provided is broken
 238  * @dev - the pcmcia device which needs a CIS override
 239  * @filename - requested filename in /lib/firmware/cis/
 240  *
 241  * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if
 242  * the one provided by the card is broken. The firmware files reside in
 243  * /lib/firmware/cis/ in userspace.
 244  */
 245 static int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
 246 {
 247         struct pcmcia_socket *s = dev->socket;
 248         const struct firmware *fw;
 249         char path[20];
 250         int ret=-ENOMEM;
 251         cisdump_t *cis;
 252
 253         if (!filename)
 254                 return -EINVAL;
 255
 256         ds_dbg(1, "trying to load firmware %s\n", filename);
 257
 258         if (strlen(filename) > 14)
 259                 return -EINVAL;
 260
 261         snprintf(path, 20, "%s", filename);
 262
 263         if (request_firmware(&fw, path, &dev->dev) == 0) {
 264                 if (fw->size >= CISTPL_MAX_CIS_SIZE)
 265                         goto release;
 266
 267                 cis = kzalloc(sizeof(cisdump_t), GFP_KERNEL);
 268                 if (!cis)
 269                         goto release;
 270
 271                 cis->Length = fw->size + 1;
 272                 memcpy(cis->Data, fw->data, fw->size);
 273
 274                 if (!pcmcia_replace_cis(s, cis))
 275                         ret = 0;
 276         }
 277  release:
 278         release_firmware(fw);
 279
 280         return (ret);
 281 }
 282
 283 #else /* !CONFIG_PCMCIA_LOAD_CIS */
 284
 285 static inline int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
 286 {
 287         return -ENODEV;
 288 }
 289
 290 #endif
 291
 292
 293 /*======================================================================*/
 294
 295
 296 /**
 297  * pcmcia_register_driver - register a PCMCIA driver with the bus core
 298  *
 299  * Registers a PCMCIA driver with the PCMCIA bus core.
 300  */
 301 static int pcmcia_device_probe(struct device *dev);
 302 static int pcmcia_device_remove(struct device * dev);
 303
 304 int pcmcia_register_driver(struct pcmcia_driver *driver)
 305 {
 306         if (!driver)
 307                 return -EINVAL;
 308
 309         pcmcia_check_driver(driver);
 310
 311         /* initialize common fields */
 312         driver->drv.bus = &pcmcia_bus_type;
 313         driver->drv.owner = driver->owner;
 314
 315         return driver_register(&driver->drv);
 316 }
 317 EXPORT_SYMBOL(pcmcia_register_driver);
 318
 319 /**
 320  * pcmcia_unregister_driver - unregister a PCMCIA driver with the bus core
 321  */
 322 void pcmcia_unregister_driver(struct pcmcia_driver *driver)
 323 {
 324         driver_unregister(&driver->drv);
 325 }
 326 EXPORT_SYMBOL(pcmcia_unregister_driver);
 327
 328
 329 /* pcmcia_device handling */
 330
 331 struct pcmcia_device * pcmcia_get_dev(struct pcmcia_device *p_dev)
 332 {
 333         struct device *tmp_dev;
 334         tmp_dev = get_device(&p_dev->dev);
 335         if (!tmp_dev)
 336                 return NULL;
 337         return to_pcmcia_dev(tmp_dev);
 338 }
 339
 340 void pcmcia_put_dev(struct pcmcia_device *p_dev)
 341 {
 342         if (p_dev)
 343                 put_device(&p_dev->dev);
 344 }
 345
 346 static void pcmcia_release_function(struct kref *ref)
 347 {
 348         struct config_t *c = container_of(ref, struct config_t, ref);
 349         kfree(c);
 350 }
 351
 352 static void pcmcia_release_dev(struct device *dev)
 353 {
 354         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 355         ds_dbg(1, "releasing dev %p\n", p_dev);
 356         pcmcia_put_socket(p_dev->socket);
 357         kfree(p_dev->devname);
 358         kref_put(&p_dev->function_config->ref, pcmcia_release_function);
 359         kfree(p_dev);
 360 }
 361
 362 static void pcmcia_add_pseudo_device(struct pcmcia_socket *s)
 363 {
 364         if (!s->pcmcia_state.device_add_pending) {
 365                 s->pcmcia_state.device_add_pending = 1;
 366                 schedule_work(&s->device_add);
 367         }
 368         return;
 369 }
 370
 371 static int pcmcia_device_probe(struct device * dev)
 372 {
 373         struct pcmcia_device *p_dev;
 374         struct pcmcia_driver *p_drv;
 375         struct pcmcia_device_id *did;
 376         struct pcmcia_socket *s;
 377         int ret = 0;
 378
 379         dev = get_device(dev);
 380         if (!dev)
 381                 return -ENODEV;
 382
 383         p_dev = to_pcmcia_dev(dev);
 384         p_drv = to_pcmcia_drv(dev->driver);
 385         s = p_dev->socket;
 386
 387         if ((!p_drv->probe) || (!p_dev->function_config) ||
 388             (!try_module_get(p_drv->owner))) {
 389                 ret = -EINVAL;
 390                 goto put_dev;
 391         }
 392
 393         p_dev->state &= ~CLIENT_UNBOUND;
 394
 395         ret = p_drv->probe(p_dev);
 396         if (ret)
 397                 goto put_module;
 398
 399         /* handle pseudo multifunction devices:
 400          * there are at most two pseudo multifunction devices.
 401          * if we're matching against the first, schedule a
 402          * call which will then check whether there are two
 403          * pseudo devices, and if not, add the second one.
 404          */
 405         did = (struct pcmcia_device_id *) p_dev->dev.driver_data;
 406         if (did && (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) &&
 407             (p_dev->socket->device_count == 1) && (p_dev->device_no == 0))
 408                 pcmcia_add_pseudo_device(p_dev->socket);
 409
 410  put_module:
 411         if (ret)
 412                 module_put(p_drv->owner);
 413  put_dev:
 414         if (ret)
 415                 put_device(dev);
 416         return (ret);
 417 }
 418
 419
 420 static int pcmcia_device_remove(struct device * dev)
 421 {
 422         struct pcmcia_device *p_dev;
 423         struct pcmcia_driver *p_drv;
 424         int i;
 425
 426         /* detach the "instance" */
 427         p_dev = to_pcmcia_dev(dev);
 428         p_drv = to_pcmcia_drv(dev->driver);
 429         if (!p_drv)
 430                 return 0;
 431
 432         if (p_drv->remove)
 433                 p_drv->remove(p_dev);
 434
 435         /* check for proper unloading */
 436         if (p_dev->state & (CLIENT_IRQ_REQ|CLIENT_IO_REQ|CLIENT_CONFIG_LOCKED))
 437                 printk(KERN_INFO "pcmcia: driver %s did not release config properly\n",
 438                        p_drv->drv.name);
 439
 440         for (i = 0; i < MAX_WIN; i++)
 441                 if (p_dev->state & CLIENT_WIN_REQ(i))
 442                         printk(KERN_INFO "pcmcia: driver %s did not release windows properly\n",
 443                                p_drv->drv.name);
 444
 445         /* references from pcmcia_probe_device */
 446         p_dev->state = CLIENT_UNBOUND;
 447         pcmcia_put_dev(p_dev);
 448         module_put(p_drv->owner);
 449
 450         return 0;
 451 }
 452
 453
 454 /*
 455  * Removes a PCMCIA card from the device tree and socket list.
 456  */
 457 static void pcmcia_card_remove(struct pcmcia_socket *s)
 458 {
 459         struct pcmcia_device    *p_dev;
 460         unsigned long           flags;
 461
 462         ds_dbg(2, "unbind_request(%d)\n", s->sock);
 463
 464         s->device_count = 0;
 465
 466         for (;;) {
 467                 /* unregister all pcmcia_devices registered with this socket*/
 468                 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 469                 if (list_empty(&s->devices_list)) {
 470                         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 471                         return;
 472                 }
 473                 p_dev = list_entry((&s->devices_list)->next, struct pcmcia_device, socket_device_list);
 474                 list_del(&p_dev->socket_device_list);
 475                 p_dev->state |= CLIENT_STALE;
 476                 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 477
 478                 device_unregister(&p_dev->dev);
 479         }
 480
 481         return;
 482 } /* unbind_request */
 483
 484
 485 /*
 486  * pcmcia_device_query -- determine information about a pcmcia device
 487  */
 488 static int pcmcia_device_query(struct pcmcia_device *p_dev)
 489 {
 490         cistpl_manfid_t manf_id;
 491         cistpl_funcid_t func_id;
 492         cistpl_vers_1_t *vers1;
 493         unsigned int i;
 494
 495         vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL);
 496         if (!vers1)
 497                 return -ENOMEM;
 498
 499         if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 500                                CISTPL_MANFID, &manf_id)) {
 501                 p_dev->manf_id = manf_id.manf;
 502                 p_dev->card_id = manf_id.card;
 503                 p_dev->has_manf_id = 1;
 504                 p_dev->has_card_id = 1;
 505         }
 506
 507         if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 508                                CISTPL_FUNCID, &func_id)) {
 509                 p_dev->func_id = func_id.func;
 510                 p_dev->has_func_id = 1;
 511         } else {
 512                 /* rule of thumb: cards with no FUNCID, but with
 513                  * common memory device geometry information, are
 514                  * probably memory cards (from pcmcia-cs) */
 515                 cistpl_device_geo_t *devgeo;
 516
 517                 devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL);
 518                 if (!devgeo) {
 519                         kfree(vers1);
 520                         return -ENOMEM;
 521                 }
 522                 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 523                                       CISTPL_DEVICE_GEO, devgeo)) {
 524                         ds_dbg(0, "mem device geometry probably means "
 525                                "FUNCID_MEMORY\n");
 526                         p_dev->func_id = CISTPL_FUNCID_MEMORY;
 527                         p_dev->has_func_id = 1;
 528                 }
 529                 kfree(devgeo);
 530         }
 531
 532         if (!pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_VERS_1,
 533                                vers1)) {
 534                 for (i=0; i < vers1->ns; i++) {
 535                         char *tmp;
 536                         unsigned int length;
 537
 538                         tmp = vers1->str + vers1->ofs[i];
 539
 540                         length = strlen(tmp) + 1;
 541                         if ((length < 2) || (length > 255))
 542                                 continue;
 543
 544                         p_dev->prod_id[i] = kmalloc(sizeof(char) * length,
 545                                                     GFP_KERNEL);
 546                         if (!p_dev->prod_id[i])
 547                                 continue;
 548
 549                         p_dev->prod_id[i] = strncpy(p_dev->prod_id[i],
 550                                                     tmp, length);
 551                 }
 552         }
 553
 554         kfree(vers1);
 555         return 0;
 556 }
 557
 558
 559 /* device_add_lock is needed to avoid double registration by cardmgr and kernel.
 560  * Serializes pcmcia_device_add; will most likely be removed in future.
 561  *
 562  * While it has the caveat that adding new PCMCIA devices inside(!) device_register()
 563  * won't work, this doesn't matter much at the moment: the driver core doesn't
 564  * support it either.
 565  */
 566 static DEFINE_MUTEX(device_add_lock);
 567
 568 struct pcmcia_device * pcmcia_device_add(struct pcmcia_socket *s, unsigned int function)
 569 {
 570         struct pcmcia_device *p_dev, *tmp_dev;
 571         unsigned long flags;
 572         int bus_id_len;
 573
 574         s = pcmcia_get_socket(s);
 575         if (!s)
 576                 return NULL;
 577
 578         mutex_lock(&device_add_lock);
 579
 580         /* max of 2 devices per card */
 581         if (s->device_count == 2)
 582                 goto err_put;
 583
 584         p_dev = kzalloc(sizeof(struct pcmcia_device), GFP_KERNEL);
 585         if (!p_dev)
 586                 goto err_put;
 587
 588         p_dev->socket = s;
 589         p_dev->device_no = (s->device_count++);
 590         p_dev->func   = function;
 591         if (s->functions <= function)
 592                 s->functions = function + 1;
 593
 594         p_dev->dev.bus = &pcmcia_bus_type;
 595         p_dev->dev.parent = s->dev.dev;
 596         p_dev->dev.release = pcmcia_release_dev;
 597         bus_id_len = sprintf (p_dev->dev.bus_id, "%d.%d", p_dev->socket->sock, p_dev->device_no);
 598
 599         p_dev->devname = kmalloc(6 + bus_id_len + 1, GFP_KERNEL);
 600         if (!p_dev->devname)
 601                 goto err_free;
 602         sprintf (p_dev->devname, "pcmcia%s", p_dev->dev.bus_id);
 603
 604         /* compat */
 605         p_dev->state = CLIENT_UNBOUND;
 606
 607
 608         spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 609
 610         /*
 611          * p_dev->function_config must be the same for all card functions.
 612          * Note that this is serialized by the device_add_lock, so that
 613          * only one such struct will be created.
 614          */
 615         list_for_each_entry(tmp_dev, &s->devices_list, socket_device_list)
 616                 if (p_dev->func == tmp_dev->func) {
 617                         p_dev->function_config = tmp_dev->function_config;
 618                         kref_get(&p_dev->function_config->ref);
 619                 }
 620
 621         /* Add to the list in pcmcia_bus_socket */
 622         list_add_tail(&p_dev->socket_device_list, &s->devices_list);
 623
 624         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 625
 626         if (!p_dev->function_config) {
 627                 p_dev->function_config = kzalloc(sizeof(struct config_t),
 628                                                  GFP_KERNEL);
 629                 if (!p_dev->function_config)
 630                         goto err_unreg;
 631                 kref_init(&p_dev->function_config->ref);
 632         }
 633
 634         printk(KERN_NOTICE "pcmcia: registering new device %s\n",
 635                p_dev->devname);
 636
 637         pcmcia_device_query(p_dev);
 638
 639         if (device_register(&p_dev->dev))
 640                 goto err_unreg;
 641
 642         mutex_unlock(&device_add_lock);
 643
 644         return p_dev;
 645
 646  err_unreg:
 647         spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 648         list_del(&p_dev->socket_device_list);
 649         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 650
 651  err_free:
 652         kfree(p_dev->devname);
 653         kfree(p_dev);
 654         s->device_count--;
 655  err_put:
 656         mutex_unlock(&device_add_lock);
 657         pcmcia_put_socket(s);
 658
 659         return NULL;
 660 }
 661
 662
 663 static int pcmcia_card_add(struct pcmcia_socket *s)
 664 {
 665         cisinfo_t cisinfo;
 666         cistpl_longlink_mfc_t mfc;
 667         unsigned int no_funcs, i;
 668         int ret = 0;
 669
 670         if (!(s->resource_setup_done))
 671                 return -EAGAIN; /* try again, but later... */
 672
 673         if (pcmcia_validate_mem(s))
 674                 return -EAGAIN; /* try again, but later... */
 675
 676         ret = pccard_validate_cis(s, BIND_FN_ALL, &cisinfo);
 677         if (ret || !cisinfo.Chains) {
 678                 ds_dbg(0, "invalid CIS or invalid resources\n");
 679                 return -ENODEV;
 680         }
 681
 682         if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
 683                 no_funcs = mfc.nfn;
 684         else
 685                 no_funcs = 1;
 686
 687         for (i=0; i < no_funcs; i++)
 688                 pcmcia_device_add(s, i);
 689
 690         return (ret);
 691 }
 692
 693
 694 static void pcmcia_delayed_add_pseudo_device(void *data)
 695 {
 696         struct pcmcia_socket *s = data;
 697         pcmcia_device_add(s, 0);
 698         s->pcmcia_state.device_add_pending = 0;
 699 }
 700
 701 static int pcmcia_requery(struct device *dev, void * _data)
 702 {
 703         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 704         if (!p_dev->dev.driver)
 705                 pcmcia_device_query(p_dev);
 706
 707         return 0;
 708 }
 709
 710 static void pcmcia_bus_rescan(struct pcmcia_socket *skt)
 711 {
 712         int no_devices=0;
 713         unsigned long flags;
 714
 715         /* must be called with skt_mutex held */
 716         spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 717         if (list_empty(&skt->devices_list))
 718                 no_devices=1;
 719         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 720
 721         /* if no devices were added for this socket yet because of
 722          * missing resource information or other trouble, we need to
 723          * do this now. */
 724         if (no_devices) {
 725                 int ret = pcmcia_card_add(skt);
 726                 if (ret)
 727                         return;
 728         }
 729
 730         /* some device information might have changed because of a CIS
 731          * update or because we can finally read it correctly... so
 732          * determine it again, overwriting old values if necessary. */
 733         bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery);
 734
 735         /* we re-scan all devices, not just the ones connected to this
 736          * socket. This does not matter, though. */
 737         bus_rescan_devices(&pcmcia_bus_type);
 738 }
 739
 740 static inline int pcmcia_devmatch(struct pcmcia_device *dev,
 741                                   struct pcmcia_device_id *did)
 742 {
 743         if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
 744                 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
 745                         return 0;
 746         }
 747
 748         if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
 749                 if ((!dev->has_card_id) || (dev->card_id != did->card_id))
 750                         return 0;
 751         }
 752
 753         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
 754                 if (dev->func != did->function)
 755                         return 0;
 756         }
 757
 758         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
 759                 if (!dev->prod_id[0])
 760                         return 0;
 761                 if (strcmp(did->prod_id[0], dev->prod_id[0]))
 762                         return 0;
 763         }
 764
 765         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
 766                 if (!dev->prod_id[1])
 767                         return 0;
 768                 if (strcmp(did->prod_id[1], dev->prod_id[1]))
 769                         return 0;
 770         }
 771
 772         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
 773                 if (!dev->prod_id[2])
 774                         return 0;
 775                 if (strcmp(did->prod_id[2], dev->prod_id[2]))
 776                         return 0;
 777         }
 778
 779         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
 780                 if (!dev->prod_id[3])
 781                         return 0;
 782                 if (strcmp(did->prod_id[3], dev->prod_id[3]))
 783                         return 0;
 784         }
 785
 786         if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
 787                 if (dev->device_no != did->device_no)
 788                         return 0;
 789         }
 790
 791         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
 792                 if ((!dev->has_func_id) || (dev->func_id != did->func_id))
 793                         return 0;
 794
 795                 /* if this is a pseudo-multi-function device,
 796                  * we need explicit matches */
 797                 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO)
 798                         return 0;
 799                 if (dev->device_no)
 800                         return 0;
 801
 802                 /* also, FUNC_ID matching needs to be activated by userspace
 803                  * after it has re-checked that there is no possible module
 804                  * with a prod_id/manf_id/card_id match.
 805                  */
 806                 if (!dev->allow_func_id_match)
 807                         return 0;
 808         }
 809
 810         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
 811                 if (!dev->socket->fake_cis)
 812                         pcmcia_load_firmware(dev, did->cisfile);
 813
 814                 if (!dev->socket->fake_cis)
 815                         return 0;
 816         }
 817
 818         if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
 819                 int i;
 820                 for (i=0; i<4; i++)
 821                         if (dev->prod_id[i])
 822                                 return 0;
 823                 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
 824                         return 0;
 825         }
 826
 827         dev->dev.driver_data = (void *) did;
 828
 829         return 1;
 830 }
 831
 832
 833 static int pcmcia_bus_match(struct device * dev, struct device_driver * drv) {
 834         struct pcmcia_device * p_dev = to_pcmcia_dev(dev);
 835         struct pcmcia_driver * p_drv = to_pcmcia_drv(drv);
 836         struct pcmcia_device_id *did = p_drv->id_table;
 837
 838 #ifdef CONFIG_PCMCIA_IOCTL
 839         /* matching by cardmgr */
 840         if (p_dev->cardmgr == p_drv)
 841                 return 1;
 842 #endif
 843
 844         while (did && did->match_flags) {
 845                 if (pcmcia_devmatch(p_dev, did))
 846                         return 1;
 847                 did++;
 848         }
 849
 850         return 0;
 851 }
 852
 853 #ifdef CONFIG_HOTPLUG
 854
 855 static int pcmcia_bus_uevent(struct device *dev, char **envp, int num_envp,
 856                              char *buffer, int buffer_size)
 857 {
 858         struct pcmcia_device *p_dev;
 859         int i, length = 0;
 860         u32 hash[4] = { 0, 0, 0, 0};
 861
 862         if (!dev)
 863                 return -ENODEV;
 864
 865         p_dev = to_pcmcia_dev(dev);
 866
 867         /* calculate hashes */
 868         for (i=0; i<4; i++) {
 869                 if (!p_dev->prod_id[i])
 870                         continue;
 871                 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
 872         }
 873
 874         i = 0;
 875
 876         if (add_uevent_var(envp, num_envp, &i,
 877                            buffer, buffer_size, &length,
 878                            "SOCKET_NO=%u",
 879                            p_dev->socket->sock))
 880                 return -ENOMEM;
 881
 882         if (add_uevent_var(envp, num_envp, &i,
 883                            buffer, buffer_size, &length,
 884                            "DEVICE_NO=%02X",
 885                            p_dev->device_no))
 886                 return -ENOMEM;
 887
 888         if (add_uevent_var(envp, num_envp, &i,
 889                            buffer, buffer_size, &length,
 890                            "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
 891                            "pa%08Xpb%08Xpc%08Xpd%08X",
 892                            p_dev->has_manf_id ? p_dev->manf_id : 0,
 893                            p_dev->has_card_id ? p_dev->card_id : 0,
 894                            p_dev->has_func_id ? p_dev->func_id : 0,
 895                            p_dev->func,
 896                            p_dev->device_no,
 897                            hash[0],
 898                            hash[1],
 899                            hash[2],
 900                            hash[3]))
 901                 return -ENOMEM;
 902
 903         envp[i] = NULL;
 904
 905         return 0;
 906 }
 907
 908 #else
 909
 910 static int pcmcia_bus_uevent(struct device *dev, char **envp, int num_envp,
 911                               char *buffer, int buffer_size)
 912 {
 913         return -ENODEV;
 914 }
 915
 916 #endif
 917
 918 /************************ per-device sysfs output ***************************/
 919
 920 #define pcmcia_device_attr(field, test, format)                         \
 921 static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf)              \
 922 {                                                                       \
 923         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);               \
 924         return p_dev->test ? sprintf (buf, format, p_dev->field) : -ENODEV; \
 925 }
 926
 927 #define pcmcia_device_stringattr(name, field)                                   \
 928 static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf)               \
 929 {                                                                       \
 930         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);               \
 931         return p_dev->field ? sprintf (buf, "%s\n", p_dev->field) : -ENODEV; \
 932 }
 933
 934 pcmcia_device_attr(func, socket, "0x%02x\n");
 935 pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
 936 pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
 937 pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
 938 pcmcia_device_stringattr(prod_id1, prod_id[0]);
 939 pcmcia_device_stringattr(prod_id2, prod_id[1]);
 940 pcmcia_device_stringattr(prod_id3, prod_id[2]);
 941 pcmcia_device_stringattr(prod_id4, prod_id[3]);
 942
 943
 944 static ssize_t pcmcia_show_pm_state(struct device *dev, struct device_attribute *attr, char *buf)
 945 {
 946         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 947
 948         if (p_dev->dev.power.power_state.event != PM_EVENT_ON)
 949                 return sprintf(buf, "off\n");
 950         else
 951                 return sprintf(buf, "on\n");
 952 }
 953
 954 static ssize_t pcmcia_store_pm_state(struct device *dev, struct device_attribute *attr,
 955                                      const char *buf, size_t count)
 956 {
 957         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 958         int ret = 0;
 959
 960         if (!count)
 961                 return -EINVAL;
 962
 963         if ((p_dev->dev.power.power_state.event == PM_EVENT_ON) &&
 964             (!strncmp(buf, "off", 3)))
 965                 ret = dpm_runtime_suspend(dev, PMSG_SUSPEND);
 966         else if ((p_dev->dev.power.power_state.event != PM_EVENT_ON) &&
 967                  (!strncmp(buf, "on", 2)))
 968                 dpm_runtime_resume(dev);
 969
 970         return ret ? ret : count;
 971 }
 972
 973
 974 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
 975 {
 976         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 977         int i;
 978         u32 hash[4] = { 0, 0, 0, 0};
 979
 980         /* calculate hashes */
 981         for (i=0; i<4; i++) {
 982                 if (!p_dev->prod_id[i])
 983                         continue;
 984                 hash[i] = crc32(0,p_dev->prod_id[i],strlen(p_dev->prod_id[i]));
 985         }
 986         return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
 987                                 "pa%08Xpb%08Xpc%08Xpd%08X\n",
 988                                 p_dev->has_manf_id ? p_dev->manf_id : 0,
 989                                 p_dev->has_card_id ? p_dev->card_id : 0,
 990                                 p_dev->has_func_id ? p_dev->func_id : 0,
 991                                 p_dev->func, p_dev->device_no,
 992                                 hash[0], hash[1], hash[2], hash[3]);
 993 }
 994
 995 static ssize_t pcmcia_store_allow_func_id_match(struct device *dev,
 996                 struct device_attribute *attr, const char *buf, size_t count)
 997 {
 998         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 999
1000         if (!count)
1001                 return -EINVAL;
1002
1003         mutex_lock(&p_dev->socket->skt_mutex);
1004         p_dev->allow_func_id_match = 1;
1005         mutex_unlock(&p_dev->socket->skt_mutex);
1006
1007         bus_rescan_devices(&pcmcia_bus_type);
1008
1009         return count;
1010 }
1011
1012 static struct device_attribute pcmcia_dev_attrs[] = {
1013         __ATTR(function, 0444, func_show, NULL),
1014         __ATTR(pm_state, 0644, pcmcia_show_pm_state, pcmcia_store_pm_state),
1015         __ATTR_RO(func_id),
1016         __ATTR_RO(manf_id),
1017         __ATTR_RO(card_id),
1018         __ATTR_RO(prod_id1),
1019         __ATTR_RO(prod_id2),
1020         __ATTR_RO(prod_id3),
1021         __ATTR_RO(prod_id4),
1022         __ATTR_RO(modalias),
1023         __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match),
1024         __ATTR_NULL,
1025 };
1026
1027 /* PM support, also needed for reset */
1028
1029 static int pcmcia_dev_suspend(struct device * dev, pm_message_t state)
1030 {
1031         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1032         struct pcmcia_driver *p_drv = NULL;
1033         int ret;
1034
1035         if (dev->driver)
1036                 p_drv = to_pcmcia_drv(dev->driver);
1037
1038         if (p_drv && p_drv->suspend) {
1039                 ret = p_drv->suspend(p_dev);
1040                 if (ret)
1041                         return ret;
1042                 if (p_dev->instance) {
1043                         p_dev->instance->state |= DEV_SUSPEND;
1044                         if ((p_dev->instance->state & DEV_CONFIG) &&
1045                             !(p_dev->instance->state & DEV_SUSPEND_NORELEASE))
1046                                 pcmcia_release_configuration(p_dev);
1047                 }
1048         }
1049
1050         return 0;
1051 }
1052
1053
1054 static int pcmcia_dev_resume(struct device * dev)
1055 {
1056         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1057         struct pcmcia_driver *p_drv = NULL;
1058         int ret;
1059
1060         if (dev->driver)
1061                 p_drv = to_pcmcia_drv(dev->driver);
1062
1063         if (p_drv && p_drv->resume) {
1064                 if (p_dev->instance) {
1065                         p_dev->instance->state &= ~DEV_SUSPEND;
1066                         if ((p_dev->instance->state & DEV_CONFIG) &&
1067                             !(p_dev->instance->state & DEV_SUSPEND_NORELEASE)){
1068                                 ret = pcmcia_request_configuration(p_dev,
1069                                                  &p_dev->instance->conf);
1070                                 if (ret)
1071                                         return ret;
1072                         }
1073                 }
1074                 return p_drv->resume(p_dev);
1075         }
1076
1077         return 0;
1078 }
1079
1080
1081 static int pcmcia_bus_suspend_callback(struct device *dev, void * _data)
1082 {
1083         struct pcmcia_socket *skt = _data;
1084         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1085
1086         if (p_dev->socket != skt)
1087                 return 0;
1088
1089         return dpm_runtime_suspend(dev, PMSG_SUSPEND);
1090 }
1091
1092 static int pcmcia_bus_resume_callback(struct device *dev, void * _data)
1093 {
1094         struct pcmcia_socket *skt = _data;
1095         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1096
1097         if (p_dev->socket != skt)
1098                 return 0;
1099
1100         dpm_runtime_resume(dev);
1101
1102         return 0;
1103 }
1104
1105 static int pcmcia_bus_resume(struct pcmcia_socket *skt)
1106 {
1107         bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback);
1108         return 0;
1109 }
1110
1111 static int pcmcia_bus_suspend(struct pcmcia_socket *skt)
1112 {
1113         if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt,
1114                              pcmcia_bus_suspend_callback)) {
1115                 pcmcia_bus_resume(skt);
1116                 return -EIO;
1117         }
1118         return 0;
1119 }
1120
1121
1122 /*======================================================================
1123
1124     The card status event handler.
1125
1126 ======================================================================*/
1127
1128 /* Normally, the event is passed to individual drivers after
1129  * informing userspace. Only for CS_EVENT_CARD_REMOVAL this
1130  * is inversed to maintain historic compatibility.
1131  */
1132
1133 static int ds_event(struct pcmcia_socket *skt, event_t event, int priority)
1134 {
1135         struct pcmcia_socket *s = pcmcia_get_socket(skt);
1136
1137         ds_dbg(1, "ds_event(0x%06x, %d, 0x%p)\n",
1138                event, priority, skt);
1139
1140         switch (event) {
1141         case CS_EVENT_CARD_REMOVAL:
1142                 s->pcmcia_state.present = 0;
1143                 pcmcia_card_remove(skt);
1144                 handle_event(skt, event);
1145                 break;
1146
1147         case CS_EVENT_CARD_INSERTION:
1148                 s->pcmcia_state.present = 1;
1149                 pcmcia_card_add(skt);
1150                 handle_event(skt, event);
1151                 break;
1152
1153         case CS_EVENT_EJECTION_REQUEST:
1154                 break;
1155
1156         case CS_EVENT_PM_SUSPEND:
1157         case CS_EVENT_PM_RESUME:
1158         case CS_EVENT_RESET_PHYSICAL:
1159         case CS_EVENT_CARD_RESET:
1160         default:
1161                 handle_event(skt, event);
1162                 break;
1163     }
1164
1165     pcmcia_put_socket(s);
1166
1167     return 0;
1168 } /* ds_event */
1169
1170
1171 static struct pcmcia_callback pcmcia_bus_callback = {
1172         .owner = THIS_MODULE,
1173         .event = ds_event,
1174         .requery = pcmcia_bus_rescan,
1175         .suspend = pcmcia_bus_suspend,
1176         .resume = pcmcia_bus_resume,
1177 };
1178
1179 static int __devinit pcmcia_bus_add_socket(struct class_device *class_dev,
1180                                            struct class_interface *class_intf)
1181 {
1182         struct pcmcia_socket *socket = class_get_devdata(class_dev);
1183         int ret;
1184
1185         socket = pcmcia_get_socket(socket);
1186         if (!socket) {
1187                 printk(KERN_ERR "PCMCIA obtaining reference to socket %p failed\n", socket);
1188                 return -ENODEV;
1189         }
1190
1191         /*
1192          * Ugly. But we want to wait for the socket threads to have started up.
1193          * We really should let the drivers themselves drive some of this..
1194          */
1195         msleep(250);
1196
1197 #ifdef CONFIG_PCMCIA_IOCTL
1198         init_waitqueue_head(&socket->queue);
1199 #endif
1200         INIT_LIST_HEAD(&socket->devices_list);
1201         INIT_WORK(&socket->device_add, pcmcia_delayed_add_pseudo_device, socket);
1202         memset(&socket->pcmcia_state, 0, sizeof(u8));
1203         socket->device_count = 0;
1204
1205         ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback);
1206         if (ret) {
1207                 printk(KERN_ERR "PCMCIA registration PCCard core failed for socket %p\n", socket);
1208                 pcmcia_put_socket(socket);
1209                 return (ret);
1210         }
1211
1212         return 0;
1213 }
1214
1215 static void pcmcia_bus_remove_socket(struct class_device *class_dev,
1216                                      struct class_interface *class_intf)
1217 {
1218         struct pcmcia_socket *socket = class_get_devdata(class_dev);
1219
1220         if (!socket)
1221                 return;
1222
1223         socket->pcmcia_state.dead = 1;
1224         pccard_register_pcmcia(socket, NULL);
1225
1226         pcmcia_put_socket(socket);
1227
1228         return;
1229 }
1230
1231
1232 /* the pcmcia_bus_interface is used to handle pcmcia socket devices */
1233 static struct class_interface pcmcia_bus_interface = {
1234         .class = &pcmcia_socket_class,
1235         .add = &pcmcia_bus_add_socket,
1236         .remove = &pcmcia_bus_remove_socket,
1237 };
1238
1239
1240 struct bus_type pcmcia_bus_type = {
1241         .name = "pcmcia",
1242         .uevent = pcmcia_bus_uevent,
1243         .match = pcmcia_bus_match,
1244         .dev_attrs = pcmcia_dev_attrs,
1245         .probe = pcmcia_device_probe,
1246         .remove = pcmcia_device_remove,
1247         .suspend = pcmcia_dev_suspend,
1248         .resume = pcmcia_dev_resume,
1249 };
1250
1251
1252 static int __init init_pcmcia_bus(void)
1253 {
1254         spin_lock_init(&pcmcia_dev_list_lock);
1255
1256         bus_register(&pcmcia_bus_type);
1257         class_interface_register(&pcmcia_bus_interface);
1258
1259         pcmcia_setup_ioctl();
1260
1261         return 0;
1262 }
1263 fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that
1264                                * pcmcia_socket_class is already registered */
1265
1266
1267 static void __exit exit_pcmcia_bus(void)
1268 {
1269         pcmcia_cleanup_ioctl();
1270
1271         class_interface_unregister(&pcmcia_bus_interface);
1272
1273         bus_unregister(&pcmcia_bus_type);
1274 }
1275 module_exit(exit_pcmcia_bus);
1276
1277
1278 MODULE_ALIAS("ds");