1/* 2 * ds.c -- 16-bit PCMCIA core support 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License version 2 as 6 * published by the Free Software Foundation. 7 * 8 * The initial developer of the original code is David A. Hinds 9 * <dahinds@users.sourceforge.net>. Portions created by David A. Hinds 10 * are Copyright (C) 1999 David A. Hinds. All Rights Reserved. 11 * 12 * (C) 1999 David A. Hinds 13 * (C) 2003 - 2010 Dominik Brodowski 14 */ 15 16#include <linux/kernel.h> 17#include <linux/module.h> 18#include <linux/init.h> 19#include <linux/errno.h> 20#include <linux/list.h> 21#include <linux/delay.h> 22#include <linux/workqueue.h> 23#include <linux/crc32.h> 24#include <linux/firmware.h> 25#include <linux/kref.h> 26#include <linux/dma-mapping.h> 27#include <linux/slab.h> 28 29#include <pcmcia/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 40MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>"); 41MODULE_DESCRIPTION("PCMCIA Driver Services"); 42MODULE_LICENSE("GPL"); 43 44 45/*====================================================================*/ 46 47static void pcmcia_check_driver(struct pcmcia_driver *p_drv) 48{ 49 struct pcmcia_device_id *did = p_drv->id_table; 50 unsigned int i; 51 u32 hash; 52 53 if (!p_drv->probe || !p_drv->remove) 54 printk(KERN_DEBUG "pcmcia: %s lacks a requisite callback " 55 "function\n", p_drv->drv.name); 56 57 while (did && did->match_flags) { 58 for (i = 0; i < 4; i++) { 59 if (!did->prod_id[i]) 60 continue; 61 62 hash = crc32(0, did->prod_id[i], strlen(did->prod_id[i])); 63 if (hash == did->prod_id_hash[i]) 64 continue; 65 66 printk(KERN_DEBUG "pcmcia: %s: invalid hash for " 67 "product string \"%s\": is 0x%x, should " 68 "be 0x%x\n", p_drv->drv.name, did->prod_id[i], 69 did->prod_id_hash[i], hash); 70 printk(KERN_DEBUG "pcmcia: see " 71 "Documentation/pcmcia/devicetable.txt for " 72 "details\n"); 73 } 74 did++; 75 } 76 77 return; 78} 79 80 81/*======================================================================*/ 82 83 84struct pcmcia_dynid { 85 struct list_head node; 86 struct pcmcia_device_id id; 87}; 88 89/** 90 * pcmcia_store_new_id - add a new PCMCIA device ID to this driver and re-probe devices 91 * @driver: target device driver 92 * @buf: buffer for scanning device ID data 93 * @count: input size 94 * 95 * Adds a new dynamic PCMCIA device ID to this driver, 96 * and causes the driver to probe for all devices again. 97 */ 98static ssize_t 99pcmcia_store_new_id(struct device_driver *driver, const char *buf, size_t count) 100{ 101 struct pcmcia_dynid *dynid; 102 struct pcmcia_driver *pdrv = to_pcmcia_drv(driver); 103 __u16 match_flags, manf_id, card_id; 104 __u8 func_id, function, device_no; 105 __u32 prod_id_hash[4] = {0, 0, 0, 0}; 106 int fields = 0; 107 int retval = 0; 108 109 fields = sscanf(buf, "%hx %hx %hx %hhx %hhx %hhx %x %x %x %x", 110 &match_flags, &manf_id, &card_id, &func_id, &function, &device_no, 111 &prod_id_hash[0], &prod_id_hash[1], &prod_id_hash[2], &prod_id_hash[3]); 112 if (fields < 6) 113 return -EINVAL; 114 115 dynid = kzalloc(sizeof(struct pcmcia_dynid), GFP_KERNEL); 116 if (!dynid) 117 return -ENOMEM; 118 119 dynid->id.match_flags = match_flags; 120 dynid->id.manf_id = manf_id; 121 dynid->id.card_id = card_id; 122 dynid->id.func_id = func_id; 123 dynid->id.function = function; 124 dynid->id.device_no = device_no; 125 memcpy(dynid->id.prod_id_hash, prod_id_hash, sizeof(__u32) * 4); 126 127 mutex_lock(&pdrv->dynids.lock); 128 list_add_tail(&dynid->node, &pdrv->dynids.list); 129 mutex_unlock(&pdrv->dynids.lock); 130 131 if (get_driver(&pdrv->drv)) { 132 retval = driver_attach(&pdrv->drv); 133 put_driver(&pdrv->drv); 134 } 135 136 if (retval) 137 return retval; 138 return count; 139} 140static DRIVER_ATTR(new_id, S_IWUSR, NULL, pcmcia_store_new_id); 141 142static void 143pcmcia_free_dynids(struct pcmcia_driver *drv) 144{ 145 struct pcmcia_dynid *dynid, *n; 146 147 mutex_lock(&drv->dynids.lock); 148 list_for_each_entry_safe(dynid, n, &drv->dynids.list, node) { 149 list_del(&dynid->node); 150 kfree(dynid); 151 } 152 mutex_unlock(&drv->dynids.lock); 153} 154 155static int 156pcmcia_create_newid_file(struct pcmcia_driver *drv) 157{ 158 int error = 0; 159 if (drv->probe != NULL) 160 error = driver_create_file(&drv->drv, &driver_attr_new_id); 161 return error; 162} 163 164 165/** 166 * pcmcia_register_driver - register a PCMCIA driver with the bus core 167 * @driver: the &driver being registered 168 * 169 * Registers a PCMCIA driver with the PCMCIA bus core. 170 */ 171int pcmcia_register_driver(struct pcmcia_driver *driver) 172{ 173 int error; 174 175 if (!driver) 176 return -EINVAL; 177 178 pcmcia_check_driver(driver); 179 180 /* initialize common fields */ 181 driver->drv.bus = &pcmcia_bus_type; 182 driver->drv.owner = driver->owner; 183 mutex_init(&driver->dynids.lock); 184 INIT_LIST_HEAD(&driver->dynids.list); 185 186 pr_debug("registering driver %s\n", driver->drv.name); 187 188 error = driver_register(&driver->drv); 189 if (error < 0) 190 return error; 191 192 error = pcmcia_create_newid_file(driver); 193 if (error) 194 driver_unregister(&driver->drv); 195 196 return error; 197} 198EXPORT_SYMBOL(pcmcia_register_driver); 199 200/** 201 * pcmcia_unregister_driver - unregister a PCMCIA driver with the bus core 202 * @driver: the &driver being unregistered 203 */ 204void pcmcia_unregister_driver(struct pcmcia_driver *driver) 205{ 206 pr_debug("unregistering driver %s\n", driver->drv.name); 207 driver_unregister(&driver->drv); 208 pcmcia_free_dynids(driver); 209} 210EXPORT_SYMBOL(pcmcia_unregister_driver); 211 212 213/* pcmcia_device handling */ 214 215static struct pcmcia_device *pcmcia_get_dev(struct pcmcia_device *p_dev) 216{ 217 struct device *tmp_dev; 218 tmp_dev = get_device(&p_dev->dev); 219 if (!tmp_dev) 220 return NULL; 221 return to_pcmcia_dev(tmp_dev); 222} 223 224static void pcmcia_put_dev(struct pcmcia_device *p_dev) 225{ 226 if (p_dev) 227 put_device(&p_dev->dev); 228} 229 230static void pcmcia_release_function(struct kref *ref) 231{ 232 struct config_t *c = container_of(ref, struct config_t, ref); 233 pr_debug("releasing config_t\n"); 234 kfree(c); 235} 236 237static void pcmcia_release_dev(struct device *dev) 238{ 239 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 240 int i; 241 dev_dbg(dev, "releasing device\n"); 242 pcmcia_put_socket(p_dev->socket); 243 for (i = 0; i < 4; i++) 244 kfree(p_dev->prod_id[i]); 245 kfree(p_dev->devname); 246 kref_put(&p_dev->function_config->ref, pcmcia_release_function); 247 kfree(p_dev); 248} 249 250 251static int pcmcia_device_probe(struct device *dev) 252{ 253 struct pcmcia_device *p_dev; 254 struct pcmcia_driver *p_drv; 255 struct pcmcia_socket *s; 256 cistpl_config_t cis_config; 257 int ret = 0; 258 259 dev = get_device(dev); 260 if (!dev) 261 return -ENODEV; 262 263 p_dev = to_pcmcia_dev(dev); 264 p_drv = to_pcmcia_drv(dev->driver); 265 s = p_dev->socket; 266 267 dev_dbg(dev, "trying to bind to %s\n", p_drv->drv.name); 268 269 if ((!p_drv->probe) || (!p_dev->function_config) || 270 (!try_module_get(p_drv->owner))) { 271 ret = -EINVAL; 272 goto put_dev; 273 } 274 275 /* set up some more device information */ 276 ret = pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_CONFIG, 277 &cis_config); 278 if (!ret) { 279 p_dev->conf.ConfigBase = cis_config.base; 280 p_dev->conf.Present = cis_config.rmask[0]; 281 } else { 282 dev_printk(KERN_INFO, dev, 283 "pcmcia: could not parse base and rmask0 of CIS\n"); 284 p_dev->conf.ConfigBase = 0; 285 p_dev->conf.Present = 0; 286 } 287 288 ret = p_drv->probe(p_dev); 289 if (ret) { 290 dev_dbg(dev, "binding to %s failed with %d\n", 291 p_drv->drv.name, ret); 292 goto put_module; 293 } 294 295 mutex_lock(&s->ops_mutex); 296 if ((s->pcmcia_pfc) && 297 (p_dev->socket->device_count == 1) && (p_dev->device_no == 0)) 298 pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY); 299 mutex_unlock(&s->ops_mutex); 300 301put_module: 302 if (ret) 303 module_put(p_drv->owner); 304put_dev: 305 if (ret) 306 put_device(dev); 307 return ret; 308} 309 310 311/* 312 * Removes a PCMCIA card from the device tree and socket list. 313 */ 314static void pcmcia_card_remove(struct pcmcia_socket *s, struct pcmcia_device *leftover) 315{ 316 struct pcmcia_device *p_dev; 317 struct pcmcia_device *tmp; 318 319 dev_dbg(leftover ? &leftover->dev : &s->dev, 320 "pcmcia_card_remove(%d) %s\n", s->sock, 321 leftover ? leftover->devname : ""); 322 323 mutex_lock(&s->ops_mutex); 324 if (!leftover) 325 s->device_count = 0; 326 else 327 s->device_count = 1; 328 mutex_unlock(&s->ops_mutex); 329 330 /* unregister all pcmcia_devices registered with this socket, except leftover */ 331 list_for_each_entry_safe(p_dev, tmp, &s->devices_list, socket_device_list) { 332 if (p_dev == leftover) 333 continue; 334 335 mutex_lock(&s->ops_mutex); 336 list_del(&p_dev->socket_device_list); 337 mutex_unlock(&s->ops_mutex); 338 339 dev_dbg(&p_dev->dev, "unregistering device\n"); 340 device_unregister(&p_dev->dev); 341 } 342 343 return; 344} 345 346static int pcmcia_device_remove(struct device *dev) 347{ 348 struct pcmcia_device *p_dev; 349 struct pcmcia_driver *p_drv; 350 int i; 351 352 p_dev = to_pcmcia_dev(dev); 353 p_drv = to_pcmcia_drv(dev->driver); 354 355 dev_dbg(dev, "removing device\n"); 356 357 /* If we're removing the primary module driving a 358 * pseudo multi-function card, we need to unbind 359 * all devices 360 */ 361 if ((p_dev->socket->pcmcia_pfc) && 362 (p_dev->socket->device_count > 0) && 363 (p_dev->device_no == 0)) 364 pcmcia_card_remove(p_dev->socket, p_dev); 365 366 /* detach the "instance" */ 367 if (!p_drv) 368 return 0; 369 370 if (p_drv->remove) 371 p_drv->remove(p_dev); 372 373 /* check for proper unloading */ 374 if (p_dev->_irq || p_dev->_io || p_dev->_locked) 375 dev_printk(KERN_INFO, dev, 376 "pcmcia: driver %s did not release config properly\n", 377 p_drv->drv.name); 378 379 for (i = 0; i < MAX_WIN; i++) 380 if (p_dev->_win & CLIENT_WIN_REQ(i)) 381 dev_printk(KERN_INFO, dev, 382 "pcmcia: driver %s did not release window properly\n", 383 p_drv->drv.name); 384 385 /* references from pcmcia_probe_device */ 386 pcmcia_put_dev(p_dev); 387 module_put(p_drv->owner); 388 389 return 0; 390} 391 392 393/* 394 * pcmcia_device_query -- determine information about a pcmcia device 395 */ 396static int pcmcia_device_query(struct pcmcia_device *p_dev) 397{ 398 cistpl_manfid_t manf_id; 399 cistpl_funcid_t func_id; 400 cistpl_vers_1_t *vers1; 401 unsigned int i; 402 403 vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL); 404 if (!vers1) 405 return -ENOMEM; 406 407 if (!pccard_read_tuple(p_dev->socket, BIND_FN_ALL, 408 CISTPL_MANFID, &manf_id)) { 409 mutex_lock(&p_dev->socket->ops_mutex); 410 p_dev->manf_id = manf_id.manf; 411 p_dev->card_id = manf_id.card; 412 p_dev->has_manf_id = 1; 413 p_dev->has_card_id = 1; 414 mutex_unlock(&p_dev->socket->ops_mutex); 415 } 416 417 if (!pccard_read_tuple(p_dev->socket, p_dev->func, 418 CISTPL_FUNCID, &func_id)) { 419 mutex_lock(&p_dev->socket->ops_mutex); 420 p_dev->func_id = func_id.func; 421 p_dev->has_func_id = 1; 422 mutex_unlock(&p_dev->socket->ops_mutex); 423 } else { 424 /* rule of thumb: cards with no FUNCID, but with 425 * common memory device geometry information, are 426 * probably memory cards (from pcmcia-cs) */ 427 cistpl_device_geo_t *devgeo; 428 429 devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL); 430 if (!devgeo) { 431 kfree(vers1); 432 return -ENOMEM; 433 } 434 if (!pccard_read_tuple(p_dev->socket, p_dev->func, 435 CISTPL_DEVICE_GEO, devgeo)) { 436 dev_dbg(&p_dev->dev, 437 "mem device geometry probably means " 438 "FUNCID_MEMORY\n"); 439 mutex_lock(&p_dev->socket->ops_mutex); 440 p_dev->func_id = CISTPL_FUNCID_MEMORY; 441 p_dev->has_func_id = 1; 442 mutex_unlock(&p_dev->socket->ops_mutex); 443 } 444 kfree(devgeo); 445 } 446 447 if (!pccard_read_tuple(p_dev->socket, BIND_FN_ALL, CISTPL_VERS_1, 448 vers1)) { 449 mutex_lock(&p_dev->socket->ops_mutex); 450 for (i = 0; i < min_t(unsigned int, 4, vers1->ns); i++) { 451 char *tmp; 452 unsigned int length; 453 char *new; 454 455 tmp = vers1->str + vers1->ofs[i]; 456 457 length = strlen(tmp) + 1; 458 if ((length < 2) || (length > 255)) 459 continue; 460 461 new = kmalloc(sizeof(char) * length, GFP_KERNEL); 462 if (!new) 463 continue; 464 465 new = strncpy(new, tmp, length); 466 467 tmp = p_dev->prod_id[i]; 468 p_dev->prod_id[i] = new; 469 kfree(tmp); 470 } 471 mutex_unlock(&p_dev->socket->ops_mutex); 472 } 473 474 kfree(vers1); 475 return 0; 476} 477 478 479static struct pcmcia_device *pcmcia_device_add(struct pcmcia_socket *s, 480 unsigned int function) 481{ 482 struct pcmcia_device *p_dev, *tmp_dev; 483 int i; 484 485 s = pcmcia_get_socket(s); 486 if (!s) 487 return NULL; 488 489 pr_debug("adding device to %d, function %d\n", s->sock, function); 490 491 p_dev = kzalloc(sizeof(struct pcmcia_device), GFP_KERNEL); 492 if (!p_dev) 493 goto err_put; 494 495 mutex_lock(&s->ops_mutex); 496 p_dev->device_no = (s->device_count++); 497 mutex_unlock(&s->ops_mutex); 498 499 /* max of 2 PFC devices */ 500 if ((p_dev->device_no >= 2) && (function == 0)) 501 goto err_free; 502 503 /* max of 4 devices overall */ 504 if (p_dev->device_no >= 4) 505 goto err_free; 506 507 p_dev->socket = s; 508 p_dev->func = function; 509 510 p_dev->dev.bus = &pcmcia_bus_type; 511 p_dev->dev.parent = s->dev.parent; 512 p_dev->dev.release = pcmcia_release_dev; 513 /* by default don't allow DMA */ 514 p_dev->dma_mask = DMA_MASK_NONE; 515 p_dev->dev.dma_mask = &p_dev->dma_mask; 516 dev_set_name(&p_dev->dev, "%d.%d", p_dev->socket->sock, p_dev->device_no); 517 if (!dev_name(&p_dev->dev)) 518 goto err_free; 519 p_dev->devname = kasprintf(GFP_KERNEL, "pcmcia%s", dev_name(&p_dev->dev)); 520 if (!p_dev->devname) 521 goto err_free; 522 dev_dbg(&p_dev->dev, "devname is %s\n", p_dev->devname); 523 524 mutex_lock(&s->ops_mutex); 525 526 /* 527 * p_dev->function_config must be the same for all card functions. 528 * Note that this is serialized by ops_mutex, so that only one 529 * such struct will be created. 530 */ 531 list_for_each_entry(tmp_dev, &s->devices_list, socket_device_list) 532 if (p_dev->func == tmp_dev->func) { 533 p_dev->function_config = tmp_dev->function_config; 534 p_dev->irq = tmp_dev->irq; 535 kref_get(&p_dev->function_config->ref); 536 } 537 538 /* Add to the list in pcmcia_bus_socket */ 539 list_add(&p_dev->socket_device_list, &s->devices_list); 540 541 if (pcmcia_setup_irq(p_dev)) 542 dev_warn(&p_dev->dev, 543 "IRQ setup failed -- device might not work\n"); 544 545 if (!p_dev->function_config) { 546 config_t *c; 547 dev_dbg(&p_dev->dev, "creating config_t\n"); 548 c = kzalloc(sizeof(struct config_t), GFP_KERNEL); 549 if (!c) { 550 mutex_unlock(&s->ops_mutex); 551 goto err_unreg; 552 } 553 p_dev->function_config = c; 554 kref_init(&c->ref); 555 for (i = 0; i < MAX_IO_WIN; i++) { 556 c->io[i].name = p_dev->devname; 557 c->io[i].flags = IORESOURCE_IO; 558 } 559 for (i = 0; i< MAX_WIN; i++) { 560 c->mem[i].name = p_dev->devname; 561 c->mem[i].flags = IORESOURCE_MEM; 562 } 563 } 564 for (i = 0; i < MAX_IO_WIN; i++) 565 p_dev->resource[i] = &p_dev->function_config->io[i]; 566 for (; i < (MAX_IO_WIN + MAX_WIN); i++) 567 p_dev->resource[i] = &p_dev->function_config->mem[i-MAX_IO_WIN]; 568 569 mutex_unlock(&s->ops_mutex); 570 571 dev_printk(KERN_NOTICE, &p_dev->dev, 572 "pcmcia: registering new device %s (IRQ: %d)\n", 573 p_dev->devname, p_dev->irq); 574 575 pcmcia_device_query(p_dev); 576 577 if (device_register(&p_dev->dev)) 578 goto err_unreg; 579 580 return p_dev; 581 582 err_unreg: 583 mutex_lock(&s->ops_mutex); 584 list_del(&p_dev->socket_device_list); 585 mutex_unlock(&s->ops_mutex); 586 587 err_free: 588 mutex_lock(&s->ops_mutex); 589 s->device_count--; 590 mutex_unlock(&s->ops_mutex); 591 592 for (i = 0; i < 4; i++) 593 kfree(p_dev->prod_id[i]); 594 kfree(p_dev->devname); 595 kfree(p_dev); 596 err_put: 597 pcmcia_put_socket(s); 598 599 return NULL; 600} 601 602 603static int pcmcia_card_add(struct pcmcia_socket *s) 604{ 605 cistpl_longlink_mfc_t mfc; 606 unsigned int no_funcs, i, no_chains; 607 int ret = -EAGAIN; 608 609 mutex_lock(&s->ops_mutex); 610 if (!(s->resource_setup_done)) { 611 dev_dbg(&s->dev, 612 "no resources available, delaying card_add\n"); 613 mutex_unlock(&s->ops_mutex); 614 return -EAGAIN; /* try again, but later... */ 615 } 616 617 if (pcmcia_validate_mem(s)) { 618 dev_dbg(&s->dev, "validating mem resources failed, " 619 "delaying card_add\n"); 620 mutex_unlock(&s->ops_mutex); 621 return -EAGAIN; /* try again, but later... */ 622 } 623 mutex_unlock(&s->ops_mutex); 624 625 ret = pccard_validate_cis(s, &no_chains); 626 if (ret || !no_chains) { 627 dev_dbg(&s->dev, "invalid CIS or invalid resources\n"); 628 return -ENODEV; 629 } 630 631 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc)) 632 no_funcs = mfc.nfn; 633 else 634 no_funcs = 1; 635 s->functions = no_funcs; 636 637 for (i = 0; i < no_funcs; i++) 638 pcmcia_device_add(s, i); 639 640 return ret; 641} 642 643 644static int pcmcia_requery_callback(struct device *dev, void * _data) 645{ 646 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 647 if (!p_dev->dev.driver) { 648 dev_dbg(dev, "update device information\n"); 649 pcmcia_device_query(p_dev); 650 } 651 652 return 0; 653} 654 655 656static void pcmcia_requery(struct pcmcia_socket *s) 657{ 658 int has_pfc; 659 660 if (s->functions == 0) { 661 pcmcia_card_add(s); 662 return; 663 } 664 665 /* some device information might have changed because of a CIS 666 * update or because we can finally read it correctly... so 667 * determine it again, overwriting old values if necessary. */ 668 bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery_callback); 669 670 /* if the CIS changed, we need to check whether the number of 671 * functions changed. */ 672 if (s->fake_cis) { 673 int old_funcs, new_funcs; 674 cistpl_longlink_mfc_t mfc; 675 676 /* does this cis override add or remove functions? */ 677 old_funcs = s->functions; 678 679 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, 680 &mfc)) 681 new_funcs = mfc.nfn; 682 else 683 new_funcs = 1; 684 if (old_funcs != new_funcs) { 685 /* we need to re-start */ 686 pcmcia_card_remove(s, NULL); 687 s->functions = 0; 688 pcmcia_card_add(s); 689 } 690 } 691 692 /* If the PCMCIA device consists of two pseudo devices, 693 * call pcmcia_device_add() -- which will fail if both 694 * devices are already registered. */ 695 mutex_lock(&s->ops_mutex); 696 has_pfc = s->pcmcia_pfc; 697 mutex_unlock(&s->ops_mutex); 698 if (has_pfc) 699 pcmcia_device_add(s, 0); 700 701 /* we re-scan all devices, not just the ones connected to this 702 * socket. This does not matter, though. */ 703 if (bus_rescan_devices(&pcmcia_bus_type)) 704 dev_warn(&s->dev, "rescanning the bus failed\n"); 705} 706 707 708#ifdef CONFIG_PCMCIA_LOAD_CIS 709 710/** 711 * pcmcia_load_firmware - load CIS from userspace if device-provided is broken 712 * @dev: the pcmcia device which needs a CIS override 713 * @filename: requested filename in /lib/firmware/ 714 * 715 * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if 716 * the one provided by the card is broken. The firmware files reside in 717 * /lib/firmware/ in userspace. 718 */ 719static int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename) 720{ 721 struct pcmcia_socket *s = dev->socket; 722 const struct firmware *fw; 723 int ret = -ENOMEM; 724 cistpl_longlink_mfc_t mfc; 725 int old_funcs, new_funcs = 1; 726 727 if (!filename) 728 return -EINVAL; 729 730 dev_dbg(&dev->dev, "trying to load CIS file %s\n", filename); 731 732 if (request_firmware(&fw, filename, &dev->dev) == 0) { 733 if (fw->size >= CISTPL_MAX_CIS_SIZE) { 734 ret = -EINVAL; 735 dev_printk(KERN_ERR, &dev->dev, 736 "pcmcia: CIS override is too big\n"); 737 goto release; 738 } 739 740 if (!pcmcia_replace_cis(s, fw->data, fw->size)) 741 ret = 0; 742 else { 743 dev_printk(KERN_ERR, &dev->dev, 744 "pcmcia: CIS override failed\n"); 745 goto release; 746 } 747 748 /* we need to re-start if the number of functions changed */ 749 old_funcs = s->functions; 750 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, 751 &mfc)) 752 new_funcs = mfc.nfn; 753 754 if (old_funcs != new_funcs) 755 ret = -EBUSY; 756 757 /* update information */ 758 pcmcia_device_query(dev); 759 760 /* requery (as number of functions might have changed) */ 761 pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY); 762 } 763 release: 764 release_firmware(fw); 765 766 return ret; 767} 768 769#else /* !CONFIG_PCMCIA_LOAD_CIS */ 770 771static inline int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename) 772{ 773 return -ENODEV; 774} 775 776#endif 777 778 779static inline int pcmcia_devmatch(struct pcmcia_device *dev, 780 struct pcmcia_device_id *did) 781{ 782 if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) { 783 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id)) 784 return 0; 785 } 786 787 if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) { 788 if ((!dev->has_card_id) || (dev->card_id != did->card_id)) 789 return 0; 790 } 791 792 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) { 793 if (dev->func != did->function) 794 return 0; 795 } 796 797 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) { 798 if (!dev->prod_id[0]) 799 return 0; 800 if (strcmp(did->prod_id[0], dev->prod_id[0])) 801 return 0; 802 } 803 804 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) { 805 if (!dev->prod_id[1]) 806 return 0; 807 if (strcmp(did->prod_id[1], dev->prod_id[1])) 808 return 0; 809 } 810 811 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) { 812 if (!dev->prod_id[2]) 813 return 0; 814 if (strcmp(did->prod_id[2], dev->prod_id[2])) 815 return 0; 816 } 817 818 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) { 819 if (!dev->prod_id[3]) 820 return 0; 821 if (strcmp(did->prod_id[3], dev->prod_id[3])) 822 return 0; 823 } 824 825 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) { 826 dev_dbg(&dev->dev, "this is a pseudo-multi-function device\n"); 827 mutex_lock(&dev->socket->ops_mutex); 828 dev->socket->pcmcia_pfc = 1; 829 mutex_unlock(&dev->socket->ops_mutex); 830 if (dev->device_no != did->device_no) 831 return 0; 832 } 833 834 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) { 835 int ret; 836 837 if ((!dev->has_func_id) || (dev->func_id != did->func_id)) 838 return 0; 839 840 /* if this is a pseudo-multi-function device, 841 * we need explicit matches */ 842 if (dev->socket->pcmcia_pfc) 843 return 0; 844 if (dev->device_no) 845 return 0; 846 847 /* also, FUNC_ID matching needs to be activated by userspace 848 * after it has re-checked that there is no possible module 849 * with a prod_id/manf_id/card_id match. 850 */ 851 mutex_lock(&dev->socket->ops_mutex); 852 ret = dev->allow_func_id_match; 853 mutex_unlock(&dev->socket->ops_mutex); 854 855 if (!ret) { 856 dev_dbg(&dev->dev, 857 "skipping FUNC_ID match until userspace ACK\n"); 858 return 0; 859 } 860 } 861 862 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) { 863 dev_dbg(&dev->dev, "device needs a fake CIS\n"); 864 if (!dev->socket->fake_cis) 865 if (pcmcia_load_firmware(dev, did->cisfile)) 866 return 0; 867 } 868 869 if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) { 870 int i; 871 for (i = 0; i < 4; i++) 872 if (dev->prod_id[i]) 873 return 0; 874 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id) 875 return 0; 876 } 877 878 return 1; 879} 880 881 882static int pcmcia_bus_match(struct device *dev, struct device_driver *drv) 883{ 884 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 885 struct pcmcia_driver *p_drv = to_pcmcia_drv(drv); 886 struct pcmcia_device_id *did = p_drv->id_table; 887 struct pcmcia_dynid *dynid; 888 889 /* match dynamic devices first */ 890 mutex_lock(&p_drv->dynids.lock); 891 list_for_each_entry(dynid, &p_drv->dynids.list, node) { 892 dev_dbg(dev, "trying to match to %s\n", drv->name); 893 if (pcmcia_devmatch(p_dev, &dynid->id)) { 894 dev_dbg(dev, "matched to %s\n", drv->name); 895 mutex_unlock(&p_drv->dynids.lock); 896 return 1; 897 } 898 } 899 mutex_unlock(&p_drv->dynids.lock); 900 901 while (did && did->match_flags) { 902 dev_dbg(dev, "trying to match to %s\n", drv->name); 903 if (pcmcia_devmatch(p_dev, did)) { 904 dev_dbg(dev, "matched to %s\n", drv->name); 905 return 1; 906 } 907 did++; 908 } 909 910 return 0; 911} 912 913#ifdef CONFIG_HOTPLUG 914 915static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env) 916{ 917 struct pcmcia_device *p_dev; 918 int i; 919 u32 hash[4] = { 0, 0, 0, 0}; 920 921 if (!dev) 922 return -ENODEV; 923 924 p_dev = to_pcmcia_dev(dev); 925 926 /* calculate hashes */ 927 for (i = 0; i < 4; i++) { 928 if (!p_dev->prod_id[i]) 929 continue; 930 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i])); 931 } 932 933 if (add_uevent_var(env, "SOCKET_NO=%u", p_dev->socket->sock)) 934 return -ENOMEM; 935 936 if (add_uevent_var(env, "DEVICE_NO=%02X", p_dev->device_no)) 937 return -ENOMEM; 938 939 if (add_uevent_var(env, "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X" 940 "pa%08Xpb%08Xpc%08Xpd%08X", 941 p_dev->has_manf_id ? p_dev->manf_id : 0, 942 p_dev->has_card_id ? p_dev->card_id : 0, 943 p_dev->has_func_id ? p_dev->func_id : 0, 944 p_dev->func, 945 p_dev->device_no, 946 hash[0], 947 hash[1], 948 hash[2], 949 hash[3])) 950 return -ENOMEM; 951 952 return 0; 953} 954 955#else 956 957static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env) 958{ 959 return -ENODEV; 960} 961 962#endif 963 964/************************ runtime PM support ***************************/ 965 966static int pcmcia_dev_suspend(struct device *dev, pm_message_t state); 967static int pcmcia_dev_resume(struct device *dev); 968 969static int runtime_suspend(struct device *dev) 970{ 971 int rc; 972 973 device_lock(dev); 974 rc = pcmcia_dev_suspend(dev, PMSG_SUSPEND); 975 device_unlock(dev); 976 return rc; 977} 978 979static int runtime_resume(struct device *dev) 980{ 981 int rc; 982 983 device_lock(dev); 984 rc = pcmcia_dev_resume(dev); 985 device_unlock(dev); 986 return rc; 987} 988 989/************************ per-device sysfs output ***************************/ 990 991#define pcmcia_device_attr(field, test, format) \ 992static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf) \ 993{ \ 994 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \ 995 return p_dev->test ? sprintf(buf, format, p_dev->field) : -ENODEV; \ 996} 997 998#define pcmcia_device_stringattr(name, field) \ 999static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf) \ 1000{ \ 1001 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \ 1002 return p_dev->field ? sprintf(buf, "%s\n", p_dev->field) : -ENODEV; \ 1003} 1004 1005pcmcia_device_attr(func, socket, "0x%02x\n"); 1006pcmcia_device_attr(func_id, has_func_id, "0x%02x\n"); 1007pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n"); 1008pcmcia_device_attr(card_id, has_card_id, "0x%04x\n"); 1009pcmcia_device_stringattr(prod_id1, prod_id[0]); 1010pcmcia_device_stringattr(prod_id2, prod_id[1]); 1011pcmcia_device_stringattr(prod_id3, prod_id[2]); 1012pcmcia_device_stringattr(prod_id4, prod_id[3]); 1013 1014static ssize_t pcmcia_show_resources(struct device *dev, 1015 struct device_attribute *attr, char *buf) 1016{ 1017 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1018 char *str = buf; 1019 int i; 1020 1021 for (i = 0; i < PCMCIA_NUM_RESOURCES; i++) 1022 str += sprintf(str, "%pr\n", p_dev->resource[i]); 1023 1024 return str - buf; 1025} 1026 1027static ssize_t pcmcia_show_pm_state(struct device *dev, struct device_attribute *attr, char *buf) 1028{ 1029 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1030 1031 if (p_dev->suspended) 1032 return sprintf(buf, "off\n"); 1033 else 1034 return sprintf(buf, "on\n"); 1035} 1036 1037static ssize_t pcmcia_store_pm_state(struct device *dev, struct device_attribute *attr, 1038 const char *buf, size_t count) 1039{ 1040 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1041 int ret = 0; 1042 1043 if (!count) 1044 return -EINVAL; 1045 1046 if ((!p_dev->suspended) && !strncmp(buf, "off", 3)) 1047 ret = runtime_suspend(dev); 1048 else if (p_dev->suspended && !strncmp(buf, "on", 2)) 1049 ret = runtime_resume(dev); 1050 1051 return ret ? ret : count; 1052} 1053 1054 1055static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf) 1056{ 1057 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1058 int i; 1059 u32 hash[4] = { 0, 0, 0, 0}; 1060 1061 /* calculate hashes */ 1062 for (i = 0; i < 4; i++) { 1063 if (!p_dev->prod_id[i]) 1064 continue; 1065 hash[i] = crc32(0, p_dev->prod_id[i], 1066 strlen(p_dev->prod_id[i])); 1067 } 1068 return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X" 1069 "pa%08Xpb%08Xpc%08Xpd%08X\n", 1070 p_dev->has_manf_id ? p_dev->manf_id : 0, 1071 p_dev->has_card_id ? p_dev->card_id : 0, 1072 p_dev->has_func_id ? p_dev->func_id : 0, 1073 p_dev->func, p_dev->device_no, 1074 hash[0], hash[1], hash[2], hash[3]); 1075} 1076 1077static ssize_t pcmcia_store_allow_func_id_match(struct device *dev, 1078 struct device_attribute *attr, const char *buf, size_t count) 1079{ 1080 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1081 1082 if (!count) 1083 return -EINVAL; 1084 1085 mutex_lock(&p_dev->socket->ops_mutex); 1086 p_dev->allow_func_id_match = 1; 1087 mutex_unlock(&p_dev->socket->ops_mutex); 1088 pcmcia_parse_uevents(p_dev->socket, PCMCIA_UEVENT_REQUERY); 1089 1090 return count; 1091} 1092 1093static struct device_attribute pcmcia_dev_attrs[] = { 1094 __ATTR(function, 0444, func_show, NULL), 1095 __ATTR(pm_state, 0644, pcmcia_show_pm_state, pcmcia_store_pm_state), 1096 __ATTR(resources, 0444, pcmcia_show_resources, NULL), 1097 __ATTR_RO(func_id), 1098 __ATTR_RO(manf_id), 1099 __ATTR_RO(card_id), 1100 __ATTR_RO(prod_id1), 1101 __ATTR_RO(prod_id2), 1102 __ATTR_RO(prod_id3), 1103 __ATTR_RO(prod_id4), 1104 __ATTR_RO(modalias), 1105 __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match), 1106 __ATTR_NULL, 1107}; 1108 1109/* PM support, also needed for reset */ 1110 1111static int pcmcia_dev_suspend(struct device *dev, pm_message_t state) 1112{ 1113 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1114 struct pcmcia_driver *p_drv = NULL; 1115 int ret = 0; 1116 1117 mutex_lock(&p_dev->socket->ops_mutex); 1118 if (p_dev->suspended) { 1119 mutex_unlock(&p_dev->socket->ops_mutex); 1120 return 0; 1121 } 1122 p_dev->suspended = 1; 1123 mutex_unlock(&p_dev->socket->ops_mutex); 1124 1125 dev_dbg(dev, "suspending\n"); 1126 1127 if (dev->driver) 1128 p_drv = to_pcmcia_drv(dev->driver); 1129 1130 if (!p_drv) 1131 goto out; 1132 1133 if (p_drv->suspend) { 1134 ret = p_drv->suspend(p_dev); 1135 if (ret) { 1136 dev_printk(KERN_ERR, dev, 1137 "pcmcia: device %s (driver %s) did " 1138 "not want to go to sleep (%d)\n", 1139 p_dev->devname, p_drv->drv.name, ret); 1140 mutex_lock(&p_dev->socket->ops_mutex); 1141 p_dev->suspended = 0; 1142 mutex_unlock(&p_dev->socket->ops_mutex); 1143 goto out; 1144 } 1145 } 1146 1147 if (p_dev->device_no == p_dev->func) { 1148 dev_dbg(dev, "releasing configuration\n"); 1149 pcmcia_release_configuration(p_dev); 1150 } 1151 1152 out: 1153 return ret; 1154} 1155 1156 1157static int pcmcia_dev_resume(struct device *dev) 1158{ 1159 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1160 struct pcmcia_driver *p_drv = NULL; 1161 int ret = 0; 1162 1163 mutex_lock(&p_dev->socket->ops_mutex); 1164 if (!p_dev->suspended) { 1165 mutex_unlock(&p_dev->socket->ops_mutex); 1166 return 0; 1167 } 1168 p_dev->suspended = 0; 1169 mutex_unlock(&p_dev->socket->ops_mutex); 1170 1171 dev_dbg(dev, "resuming\n"); 1172 1173 if (dev->driver) 1174 p_drv = to_pcmcia_drv(dev->driver); 1175 1176 if (!p_drv) 1177 goto out; 1178 1179 if (p_dev->device_no == p_dev->func) { 1180 dev_dbg(dev, "requesting configuration\n"); 1181 ret = pcmcia_request_configuration(p_dev, &p_dev->conf); 1182 if (ret) 1183 goto out; 1184 } 1185 1186 if (p_drv->resume) 1187 ret = p_drv->resume(p_dev); 1188 1189 out: 1190 return ret; 1191} 1192 1193 1194static int pcmcia_bus_suspend_callback(struct device *dev, void * _data) 1195{ 1196 struct pcmcia_socket *skt = _data; 1197 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1198 1199 if (p_dev->socket != skt || p_dev->suspended) 1200 return 0; 1201 1202 return runtime_suspend(dev); 1203} 1204 1205static int pcmcia_bus_resume_callback(struct device *dev, void * _data) 1206{ 1207 struct pcmcia_socket *skt = _data; 1208 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1209 1210 if (p_dev->socket != skt || !p_dev->suspended) 1211 return 0; 1212 1213 runtime_resume(dev); 1214 1215 return 0; 1216} 1217 1218static int pcmcia_bus_resume(struct pcmcia_socket *skt) 1219{ 1220 dev_dbg(&skt->dev, "resuming socket %d\n", skt->sock); 1221 bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback); 1222 return 0; 1223} 1224 1225static int pcmcia_bus_suspend(struct pcmcia_socket *skt) 1226{ 1227 dev_dbg(&skt->dev, "suspending socket %d\n", skt->sock); 1228 if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt, 1229 pcmcia_bus_suspend_callback)) { 1230 pcmcia_bus_resume(skt); 1231 return -EIO; 1232 } 1233 return 0; 1234} 1235 1236static int pcmcia_bus_remove(struct pcmcia_socket *skt) 1237{ 1238 atomic_set(&skt->present, 0); 1239 pcmcia_card_remove(skt, NULL); 1240 1241 mutex_lock(&skt->ops_mutex); 1242 destroy_cis_cache(skt); 1243 pcmcia_cleanup_irq(skt); 1244 mutex_unlock(&skt->ops_mutex); 1245 1246 return 0; 1247} 1248 1249static int pcmcia_bus_add(struct pcmcia_socket *skt) 1250{ 1251 atomic_set(&skt->present, 1); 1252 1253 mutex_lock(&skt->ops_mutex); 1254 skt->pcmcia_pfc = 0; 1255 destroy_cis_cache(skt); /* to be on the safe side... */ 1256 mutex_unlock(&skt->ops_mutex); 1257 1258 pcmcia_card_add(skt); 1259 1260 return 0; 1261} 1262 1263static int pcmcia_bus_early_resume(struct pcmcia_socket *skt) 1264{ 1265 if (!verify_cis_cache(skt)) { 1266 pcmcia_put_socket(skt); 1267 return 0; 1268 } 1269 1270 dev_dbg(&skt->dev, "cis mismatch - different card\n"); 1271 1272 /* first, remove the card */ 1273 pcmcia_bus_remove(skt); 1274 1275 mutex_lock(&skt->ops_mutex); 1276 destroy_cis_cache(skt); 1277 kfree(skt->fake_cis); 1278 skt->fake_cis = NULL; 1279 skt->functions = 0; 1280 mutex_unlock(&skt->ops_mutex); 1281 1282 /* now, add the new card */ 1283 pcmcia_bus_add(skt); 1284 return 0; 1285} 1286 1287 1288/* 1289 * NOTE: This is racy. There's no guarantee the card will still be 1290 * physically present, even if the call to this function returns 1291 * non-NULL. Furthermore, the device driver most likely is unbound 1292 * almost immediately, so the timeframe where pcmcia_dev_present 1293 * returns NULL is probably really really small. 1294 */ 1295struct pcmcia_device *pcmcia_dev_present(struct pcmcia_device *_p_dev) 1296{ 1297 struct pcmcia_device *p_dev; 1298 struct pcmcia_device *ret = NULL; 1299 1300 p_dev = pcmcia_get_dev(_p_dev); 1301 if (!p_dev) 1302 return NULL; 1303 1304 if (atomic_read(&p_dev->socket->present) != 0) 1305 ret = p_dev; 1306 1307 pcmcia_put_dev(p_dev); 1308 return ret; 1309} 1310EXPORT_SYMBOL(pcmcia_dev_present); 1311 1312 1313static struct pcmcia_callback pcmcia_bus_callback = { 1314 .owner = THIS_MODULE, 1315 .add = pcmcia_bus_add, 1316 .remove = pcmcia_bus_remove, 1317 .requery = pcmcia_requery, 1318 .validate = pccard_validate_cis, 1319 .suspend = pcmcia_bus_suspend, 1320 .early_resume = pcmcia_bus_early_resume, 1321 .resume = pcmcia_bus_resume, 1322}; 1323 1324static int __devinit pcmcia_bus_add_socket(struct device *dev, 1325 struct class_interface *class_intf) 1326{ 1327 struct pcmcia_socket *socket = dev_get_drvdata(dev); 1328 int ret; 1329 1330 socket = pcmcia_get_socket(socket); 1331 if (!socket) { 1332 dev_printk(KERN_ERR, dev, 1333 "PCMCIA obtaining reference to socket failed\n"); 1334 return -ENODEV; 1335 } 1336 1337 ret = sysfs_create_bin_file(&dev->kobj, &pccard_cis_attr); 1338 if (ret) { 1339 dev_printk(KERN_ERR, dev, "PCMCIA registration failed\n"); 1340 pcmcia_put_socket(socket); 1341 return ret; 1342 } 1343 1344 INIT_LIST_HEAD(&socket->devices_list); 1345 socket->pcmcia_pfc = 0; 1346 socket->device_count = 0; 1347 atomic_set(&socket->present, 0); 1348 1349 ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback); 1350 if (ret) { 1351 dev_printk(KERN_ERR, dev, "PCMCIA registration failed\n"); 1352 pcmcia_put_socket(socket); 1353 return ret; 1354 } 1355 1356 return 0; 1357} 1358 1359static void pcmcia_bus_remove_socket(struct device *dev, 1360 struct class_interface *class_intf) 1361{ 1362 struct pcmcia_socket *socket = dev_get_drvdata(dev); 1363 1364 if (!socket) 1365 return; 1366 1367 pccard_register_pcmcia(socket, NULL); 1368 1369 /* unregister any unbound devices */ 1370 mutex_lock(&socket->skt_mutex); 1371 pcmcia_card_remove(socket, NULL); 1372 release_cis_mem(socket); 1373 mutex_unlock(&socket->skt_mutex); 1374 1375 sysfs_remove_bin_file(&dev->kobj, &pccard_cis_attr); 1376 1377 pcmcia_put_socket(socket); 1378 1379 return; 1380} 1381 1382 1383/* the pcmcia_bus_interface is used to handle pcmcia socket devices */ 1384static struct class_interface pcmcia_bus_interface __refdata = { 1385 .class = &pcmcia_socket_class, 1386 .add_dev = &pcmcia_bus_add_socket, 1387 .remove_dev = &pcmcia_bus_remove_socket, 1388}; 1389 1390 1391struct bus_type pcmcia_bus_type = { 1392 .name = "pcmcia", 1393 .uevent = pcmcia_bus_uevent, 1394 .match = pcmcia_bus_match, 1395 .dev_attrs = pcmcia_dev_attrs, 1396 .probe = pcmcia_device_probe, 1397 .remove = pcmcia_device_remove, 1398 .suspend = pcmcia_dev_suspend, 1399 .resume = pcmcia_dev_resume, 1400}; 1401 1402 1403static int __init init_pcmcia_bus(void) 1404{ 1405 int ret; 1406 1407 ret = bus_register(&pcmcia_bus_type); 1408 if (ret < 0) { 1409 printk(KERN_WARNING "pcmcia: bus_register error: %d\n", ret); 1410 return ret; 1411 } 1412 ret = class_interface_register(&pcmcia_bus_interface); 1413 if (ret < 0) { 1414 printk(KERN_WARNING 1415 "pcmcia: class_interface_register error: %d\n", ret); 1416 bus_unregister(&pcmcia_bus_type); 1417 return ret; 1418 } 1419 1420 return 0; 1421} 1422fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that 1423 * pcmcia_socket_class is already registered */ 1424 1425 1426static void __exit exit_pcmcia_bus(void) 1427{ 1428 class_interface_unregister(&pcmcia_bus_interface); 1429 1430 bus_unregister(&pcmcia_bus_type); 1431} 1432module_exit(exit_pcmcia_bus); 1433 1434 1435MODULE_ALIAS("ds"); 1436