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