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 /*====================================================================*/ 46 47 static 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 84 struct 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 */ 98 static ssize_t 99 pcmcia_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 } 140 static DRIVER_ATTR(new_id, S_IWUSR, NULL, pcmcia_store_new_id); 141 142 static void 143 pcmcia_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 } 154 155 static int 156 pcmcia_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 */ 171 int 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 } 198 EXPORT_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 */ 204 void 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 } 210 EXPORT_SYMBOL(pcmcia_unregister_driver); 211 212 213 /* pcmcia_device handling */ 214 215 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 } 223 224 void pcmcia_put_dev(struct pcmcia_device *p_dev) 225 { 226 if (p_dev) 227 put_device(&p_dev->dev); 228 } 229 230 static 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 } 236 237 static 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 } 249 250 251 static 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_state.has_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); 300 301 put_module: 302 if (ret) 303 module_put(p_drv->owner); 304 put_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 */ 314 static 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 p_dev->_removed = 1; 338 mutex_unlock(&s->ops_mutex); 339 340 dev_dbg(&p_dev->dev, "unregistering device\n"); 341 device_unregister(&p_dev->dev); 342 } 343 344 return; 345 } 346 347 static int pcmcia_device_remove(struct device *dev) 348 { 349 struct pcmcia_device *p_dev; 350 struct pcmcia_driver *p_drv; 351 int i; 352 353 p_dev = to_pcmcia_dev(dev); 354 p_drv = to_pcmcia_drv(dev->driver); 355 356 dev_dbg(dev, "removing device\n"); 357 358 /* If we're removing the primary module driving a 359 * pseudo multi-function card, we need to unbind 360 * all devices 361 */ 362 if ((p_dev->socket->pcmcia_state.has_pfc) && 363 (p_dev->socket->device_count > 0) && 364 (p_dev->device_no == 0)) 365 pcmcia_card_remove(p_dev->socket, p_dev); 366 367 /* detach the "instance" */ 368 if (!p_drv) 369 return 0; 370 371 if (p_drv->remove) 372 p_drv->remove(p_dev); 373 374 p_dev->dev_node = NULL; 375 376 /* check for proper unloading */ 377 if (p_dev->_irq || p_dev->_io || p_dev->_locked) 378 dev_printk(KERN_INFO, dev, 379 "pcmcia: driver %s did not release config properly\n", 380 p_drv->drv.name); 381 382 for (i = 0; i < MAX_WIN; i++) 383 if (p_dev->_win & CLIENT_WIN_REQ(i)) 384 dev_printk(KERN_INFO, dev, 385 "pcmcia: driver %s did not release window properly\n", 386 p_drv->drv.name); 387 388 /* references from pcmcia_probe_device */ 389 pcmcia_put_dev(p_dev); 390 module_put(p_drv->owner); 391 392 return 0; 393 } 394 395 396 /* 397 * pcmcia_device_query -- determine information about a pcmcia device 398 */ 399 static int pcmcia_device_query(struct pcmcia_device *p_dev) 400 { 401 cistpl_manfid_t manf_id; 402 cistpl_funcid_t func_id; 403 cistpl_vers_1_t *vers1; 404 unsigned int i; 405 406 vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL); 407 if (!vers1) 408 return -ENOMEM; 409 410 if (!pccard_read_tuple(p_dev->socket, BIND_FN_ALL, 411 CISTPL_MANFID, &manf_id)) { 412 mutex_lock(&p_dev->socket->ops_mutex); 413 p_dev->manf_id = manf_id.manf; 414 p_dev->card_id = manf_id.card; 415 p_dev->has_manf_id = 1; 416 p_dev->has_card_id = 1; 417 mutex_unlock(&p_dev->socket->ops_mutex); 418 } 419 420 if (!pccard_read_tuple(p_dev->socket, p_dev->func, 421 CISTPL_FUNCID, &func_id)) { 422 mutex_lock(&p_dev->socket->ops_mutex); 423 p_dev->func_id = func_id.func; 424 p_dev->has_func_id = 1; 425 mutex_unlock(&p_dev->socket->ops_mutex); 426 } else { 427 /* rule of thumb: cards with no FUNCID, but with 428 * common memory device geometry information, are 429 * probably memory cards (from pcmcia-cs) */ 430 cistpl_device_geo_t *devgeo; 431 432 devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL); 433 if (!devgeo) { 434 kfree(vers1); 435 return -ENOMEM; 436 } 437 if (!pccard_read_tuple(p_dev->socket, p_dev->func, 438 CISTPL_DEVICE_GEO, devgeo)) { 439 dev_dbg(&p_dev->dev, 440 "mem device geometry probably means " 441 "FUNCID_MEMORY\n"); 442 mutex_lock(&p_dev->socket->ops_mutex); 443 p_dev->func_id = CISTPL_FUNCID_MEMORY; 444 p_dev->has_func_id = 1; 445 mutex_unlock(&p_dev->socket->ops_mutex); 446 } 447 kfree(devgeo); 448 } 449 450 if (!pccard_read_tuple(p_dev->socket, BIND_FN_ALL, CISTPL_VERS_1, 451 vers1)) { 452 mutex_lock(&p_dev->socket->ops_mutex); 453 for (i = 0; i < min_t(unsigned int, 4, vers1->ns); i++) { 454 char *tmp; 455 unsigned int length; 456 char *new; 457 458 tmp = vers1->str + vers1->ofs[i]; 459 460 length = strlen(tmp) + 1; 461 if ((length < 2) || (length > 255)) 462 continue; 463 464 new = kmalloc(sizeof(char) * length, GFP_KERNEL); 465 if (!new) 466 continue; 467 468 new = strncpy(new, tmp, length); 469 470 tmp = p_dev->prod_id[i]; 471 p_dev->prod_id[i] = new; 472 kfree(tmp); 473 } 474 mutex_unlock(&p_dev->socket->ops_mutex); 475 } 476 477 kfree(vers1); 478 return 0; 479 } 480 481 482 /* device_add_lock is needed to avoid double registration by cardmgr and kernel. 483 * Serializes pcmcia_device_add; will most likely be removed in future. 484 * 485 * While it has the caveat that adding new PCMCIA devices inside(!) device_register() 486 * won't work, this doesn't matter much at the moment: the driver core doesn't 487 * support it either. 488 */ 489 static DEFINE_MUTEX(device_add_lock); 490 491 struct pcmcia_device *pcmcia_device_add(struct pcmcia_socket *s, unsigned int function) 492 { 493 struct pcmcia_device *p_dev, *tmp_dev; 494 int i; 495 496 s = pcmcia_get_socket(s); 497 if (!s) 498 return NULL; 499 500 mutex_lock(&device_add_lock); 501 502 pr_debug("adding device to %d, function %d\n", s->sock, function); 503 504 p_dev = kzalloc(sizeof(struct pcmcia_device), GFP_KERNEL); 505 if (!p_dev) 506 goto err_put; 507 508 mutex_lock(&s->ops_mutex); 509 p_dev->device_no = (s->device_count++); 510 mutex_unlock(&s->ops_mutex); 511 512 /* max of 2 devices per card */ 513 if (p_dev->device_no >= 2) 514 goto err_free; 515 516 p_dev->socket = s; 517 p_dev->func = function; 518 519 p_dev->dev.bus = &pcmcia_bus_type; 520 p_dev->dev.parent = s->dev.parent; 521 p_dev->dev.release = pcmcia_release_dev; 522 /* by default don't allow DMA */ 523 p_dev->dma_mask = DMA_MASK_NONE; 524 p_dev->dev.dma_mask = &p_dev->dma_mask; 525 dev_set_name(&p_dev->dev, "%d.%d", p_dev->socket->sock, p_dev->device_no); 526 if (!dev_name(&p_dev->dev)) 527 goto err_free; 528 p_dev->devname = kasprintf(GFP_KERNEL, "pcmcia%s", dev_name(&p_dev->dev)); 529 if (!p_dev->devname) 530 goto err_free; 531 dev_dbg(&p_dev->dev, "devname is %s\n", p_dev->devname); 532 533 mutex_lock(&s->ops_mutex); 534 535 /* 536 * p_dev->function_config must be the same for all card functions. 537 * Note that this is serialized by the device_add_lock, so that 538 * only one such struct will be created. 539 */ 540 list_for_each_entry(tmp_dev, &s->devices_list, socket_device_list) 541 if (p_dev->func == tmp_dev->func) { 542 p_dev->function_config = tmp_dev->function_config; 543 p_dev->io = tmp_dev->io; 544 p_dev->irq = tmp_dev->irq; 545 kref_get(&p_dev->function_config->ref); 546 } 547 548 /* Add to the list in pcmcia_bus_socket */ 549 list_add(&p_dev->socket_device_list, &s->devices_list); 550 551 mutex_unlock(&s->ops_mutex); 552 553 if (!p_dev->function_config) { 554 dev_dbg(&p_dev->dev, "creating config_t\n"); 555 p_dev->function_config = kzalloc(sizeof(struct config_t), 556 GFP_KERNEL); 557 if (!p_dev->function_config) 558 goto err_unreg; 559 kref_init(&p_dev->function_config->ref); 560 } 561 562 dev_printk(KERN_NOTICE, &p_dev->dev, 563 "pcmcia: registering new device %s\n", 564 p_dev->devname); 565 566 pcmcia_device_query(p_dev); 567 568 if (device_register(&p_dev->dev)) 569 goto err_unreg; 570 571 mutex_unlock(&device_add_lock); 572 573 return p_dev; 574 575 err_unreg: 576 mutex_lock(&s->ops_mutex); 577 list_del(&p_dev->socket_device_list); 578 mutex_unlock(&s->ops_mutex); 579 580 err_free: 581 mutex_lock(&s->ops_mutex); 582 s->device_count--; 583 mutex_unlock(&s->ops_mutex); 584 585 for (i = 0; i < 4; i++) 586 kfree(p_dev->prod_id[i]); 587 kfree(p_dev->devname); 588 kfree(p_dev); 589 err_put: 590 mutex_unlock(&device_add_lock); 591 pcmcia_put_socket(s); 592 593 return NULL; 594 } 595 596 597 static int pcmcia_card_add(struct pcmcia_socket *s) 598 { 599 cistpl_longlink_mfc_t mfc; 600 unsigned int no_funcs, i, no_chains; 601 int ret = -EAGAIN; 602 603 mutex_lock(&s->ops_mutex); 604 if (!(s->resource_setup_done)) { 605 dev_dbg(&s->dev, 606 "no resources available, delaying card_add\n"); 607 mutex_unlock(&s->ops_mutex); 608 return -EAGAIN; /* try again, but later... */ 609 } 610 611 if (pcmcia_validate_mem(s)) { 612 dev_dbg(&s->dev, "validating mem resources failed, " 613 "delaying card_add\n"); 614 mutex_unlock(&s->ops_mutex); 615 return -EAGAIN; /* try again, but later... */ 616 } 617 mutex_unlock(&s->ops_mutex); 618 619 ret = pccard_validate_cis(s, &no_chains); 620 if (ret || !no_chains) { 621 dev_dbg(&s->dev, "invalid CIS or invalid resources\n"); 622 return -ENODEV; 623 } 624 625 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc)) 626 no_funcs = mfc.nfn; 627 else 628 no_funcs = 1; 629 s->functions = no_funcs; 630 631 for (i = 0; i < no_funcs; i++) 632 pcmcia_device_add(s, i); 633 634 return ret; 635 } 636 637 638 static int pcmcia_requery_callback(struct device *dev, void * _data) 639 { 640 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 641 if (!p_dev->dev.driver) { 642 dev_dbg(dev, "update device information\n"); 643 pcmcia_device_query(p_dev); 644 } 645 646 return 0; 647 } 648 649 650 static void pcmcia_requery(struct pcmcia_socket *s) 651 { 652 int present, has_pfc; 653 654 mutex_lock(&s->ops_mutex); 655 present = s->pcmcia_state.present; 656 mutex_unlock(&s->ops_mutex); 657 658 if (!present) 659 return; 660 661 if (s->functions == 0) { 662 pcmcia_card_add(s); 663 return; 664 } 665 666 /* some device information might have changed because of a CIS 667 * update or because we can finally read it correctly... so 668 * determine it again, overwriting old values if necessary. */ 669 bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery_callback); 670 671 /* if the CIS changed, we need to check whether the number of 672 * functions changed. */ 673 if (s->fake_cis) { 674 int old_funcs, new_funcs; 675 cistpl_longlink_mfc_t mfc; 676 677 /* does this cis override add or remove functions? */ 678 old_funcs = s->functions; 679 680 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, 681 &mfc)) 682 new_funcs = mfc.nfn; 683 else 684 new_funcs = 1; 685 if (old_funcs > new_funcs) { 686 pcmcia_card_remove(s, NULL); 687 pcmcia_card_add(s); 688 } else if (new_funcs > old_funcs) { 689 s->functions = new_funcs; 690 pcmcia_device_add(s, 1); 691 } 692 } 693 694 /* If the PCMCIA device consists of two pseudo devices, 695 * call pcmcia_device_add() -- which will fail if both 696 * devices are already registered. */ 697 mutex_lock(&s->ops_mutex); 698 has_pfc = s->pcmcia_state.has_pfc; 699 mutex_unlock(&s->ops_mutex); 700 if (has_pfc) 701 pcmcia_device_add(s, 0); 702 703 /* we re-scan all devices, not just the ones connected to this 704 * socket. This does not matter, though. */ 705 if (bus_rescan_devices(&pcmcia_bus_type)) 706 dev_warn(&s->dev, "rescanning the bus failed\n"); 707 } 708 709 710 #ifdef CONFIG_PCMCIA_LOAD_CIS 711 712 /** 713 * pcmcia_load_firmware - load CIS from userspace if device-provided is broken 714 * @dev: the pcmcia device which needs a CIS override 715 * @filename: requested filename in /lib/firmware/ 716 * 717 * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if 718 * the one provided by the card is broken. The firmware files reside in 719 * /lib/firmware/ in userspace. 720 */ 721 static int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename) 722 { 723 struct pcmcia_socket *s = dev->socket; 724 const struct firmware *fw; 725 int ret = -ENOMEM; 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 } 747 748 749 /* update information */ 750 pcmcia_device_query(dev); 751 752 /* requery (as number of functions might have changed) */ 753 pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY); 754 } 755 release: 756 release_firmware(fw); 757 758 return ret; 759 } 760 761 #else /* !CONFIG_PCMCIA_LOAD_CIS */ 762 763 static inline int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename) 764 { 765 return -ENODEV; 766 } 767 768 #endif 769 770 771 static inline int pcmcia_devmatch(struct pcmcia_device *dev, 772 struct pcmcia_device_id *did) 773 { 774 if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) { 775 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id)) 776 return 0; 777 } 778 779 if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) { 780 if ((!dev->has_card_id) || (dev->card_id != did->card_id)) 781 return 0; 782 } 783 784 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) { 785 if (dev->func != did->function) 786 return 0; 787 } 788 789 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) { 790 if (!dev->prod_id[0]) 791 return 0; 792 if (strcmp(did->prod_id[0], dev->prod_id[0])) 793 return 0; 794 } 795 796 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) { 797 if (!dev->prod_id[1]) 798 return 0; 799 if (strcmp(did->prod_id[1], dev->prod_id[1])) 800 return 0; 801 } 802 803 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) { 804 if (!dev->prod_id[2]) 805 return 0; 806 if (strcmp(did->prod_id[2], dev->prod_id[2])) 807 return 0; 808 } 809 810 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) { 811 if (!dev->prod_id[3]) 812 return 0; 813 if (strcmp(did->prod_id[3], dev->prod_id[3])) 814 return 0; 815 } 816 817 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) { 818 if (dev->device_no != did->device_no) 819 return 0; 820 mutex_lock(&dev->socket->ops_mutex); 821 dev->socket->pcmcia_state.has_pfc = 1; 822 mutex_unlock(&dev->socket->ops_mutex); 823 } 824 825 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) { 826 int ret; 827 828 if ((!dev->has_func_id) || (dev->func_id != did->func_id)) 829 return 0; 830 831 /* if this is a pseudo-multi-function device, 832 * we need explicit matches */ 833 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) 834 return 0; 835 if (dev->device_no) 836 return 0; 837 838 /* also, FUNC_ID matching needs to be activated by userspace 839 * after it has re-checked that there is no possible module 840 * with a prod_id/manf_id/card_id match. 841 */ 842 mutex_lock(&dev->socket->ops_mutex); 843 ret = dev->allow_func_id_match; 844 mutex_unlock(&dev->socket->ops_mutex); 845 846 if (!ret) { 847 dev_dbg(&dev->dev, 848 "skipping FUNC_ID match until userspace ACK\n"); 849 return 0; 850 } 851 } 852 853 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) { 854 dev_dbg(&dev->dev, "device needs a fake CIS\n"); 855 if (!dev->socket->fake_cis) 856 pcmcia_load_firmware(dev, did->cisfile); 857 858 if (!dev->socket->fake_cis) 859 return 0; 860 } 861 862 if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) { 863 int i; 864 for (i = 0; i < 4; i++) 865 if (dev->prod_id[i]) 866 return 0; 867 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id) 868 return 0; 869 } 870 871 return 1; 872 } 873 874 875 static int pcmcia_bus_match(struct device *dev, struct device_driver *drv) 876 { 877 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 878 struct pcmcia_driver *p_drv = to_pcmcia_drv(drv); 879 struct pcmcia_device_id *did = p_drv->id_table; 880 struct pcmcia_dynid *dynid; 881 882 /* match dynamic devices first */ 883 mutex_lock(&p_drv->dynids.lock); 884 list_for_each_entry(dynid, &p_drv->dynids.list, node) { 885 dev_dbg(dev, "trying to match to %s\n", drv->name); 886 if (pcmcia_devmatch(p_dev, &dynid->id)) { 887 dev_dbg(dev, "matched to %s\n", drv->name); 888 mutex_unlock(&p_drv->dynids.lock); 889 return 1; 890 } 891 } 892 mutex_unlock(&p_drv->dynids.lock); 893 894 #ifdef CONFIG_PCMCIA_IOCTL 895 /* matching by cardmgr */ 896 if (p_dev->cardmgr == p_drv) { 897 dev_dbg(dev, "cardmgr matched to %s\n", drv->name); 898 return 1; 899 } 900 #endif 901 902 while (did && did->match_flags) { 903 dev_dbg(dev, "trying to match to %s\n", drv->name); 904 if (pcmcia_devmatch(p_dev, did)) { 905 dev_dbg(dev, "matched to %s\n", drv->name); 906 return 1; 907 } 908 did++; 909 } 910 911 return 0; 912 } 913 914 #ifdef CONFIG_HOTPLUG 915 916 static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env) 917 { 918 struct pcmcia_device *p_dev; 919 int i; 920 u32 hash[4] = { 0, 0, 0, 0}; 921 922 if (!dev) 923 return -ENODEV; 924 925 p_dev = to_pcmcia_dev(dev); 926 927 /* calculate hashes */ 928 for (i = 0; i < 4; i++) { 929 if (!p_dev->prod_id[i]) 930 continue; 931 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i])); 932 } 933 934 if (add_uevent_var(env, "SOCKET_NO=%u", p_dev->socket->sock)) 935 return -ENOMEM; 936 937 if (add_uevent_var(env, "DEVICE_NO=%02X", p_dev->device_no)) 938 return -ENOMEM; 939 940 if (add_uevent_var(env, "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X" 941 "pa%08Xpb%08Xpc%08Xpd%08X", 942 p_dev->has_manf_id ? p_dev->manf_id : 0, 943 p_dev->has_card_id ? p_dev->card_id : 0, 944 p_dev->has_func_id ? p_dev->func_id : 0, 945 p_dev->func, 946 p_dev->device_no, 947 hash[0], 948 hash[1], 949 hash[2], 950 hash[3])) 951 return -ENOMEM; 952 953 return 0; 954 } 955 956 #else 957 958 static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env) 959 { 960 return -ENODEV; 961 } 962 963 #endif 964 965 /************************ runtime PM support ***************************/ 966 967 static int pcmcia_dev_suspend(struct device *dev, pm_message_t state); 968 static int pcmcia_dev_resume(struct device *dev); 969 970 static int runtime_suspend(struct device *dev) 971 { 972 int rc; 973 974 down(&dev->sem); 975 rc = pcmcia_dev_suspend(dev, PMSG_SUSPEND); 976 up(&dev->sem); 977 return rc; 978 } 979 980 static int runtime_resume(struct device *dev) 981 { 982 int rc; 983 984 down(&dev->sem); 985 rc = pcmcia_dev_resume(dev); 986 up(&dev->sem); 987 return rc; 988 } 989 990 /************************ per-device sysfs output ***************************/ 991 992 #define pcmcia_device_attr(field, test, format) \ 993 static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf) \ 994 { \ 995 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \ 996 return p_dev->test ? sprintf(buf, format, p_dev->field) : -ENODEV; \ 997 } 998 999 #define pcmcia_device_stringattr(name, field) \ 1000 static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf) \ 1001 { \ 1002 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \ 1003 return p_dev->field ? sprintf(buf, "%s\n", p_dev->field) : -ENODEV; \ 1004 } 1005 1006 pcmcia_device_attr(func, socket, "0x%02x\n"); 1007 pcmcia_device_attr(func_id, has_func_id, "0x%02x\n"); 1008 pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n"); 1009 pcmcia_device_attr(card_id, has_card_id, "0x%04x\n"); 1010 pcmcia_device_stringattr(prod_id1, prod_id[0]); 1011 pcmcia_device_stringattr(prod_id2, prod_id[1]); 1012 pcmcia_device_stringattr(prod_id3, prod_id[2]); 1013 pcmcia_device_stringattr(prod_id4, prod_id[3]); 1014 1015 1016 static ssize_t pcmcia_show_pm_state(struct device *dev, struct device_attribute *attr, char *buf) 1017 { 1018 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1019 1020 if (p_dev->suspended) 1021 return sprintf(buf, "off\n"); 1022 else 1023 return sprintf(buf, "on\n"); 1024 } 1025 1026 static ssize_t pcmcia_store_pm_state(struct device *dev, struct device_attribute *attr, 1027 const char *buf, size_t count) 1028 { 1029 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1030 int ret = 0; 1031 1032 if (!count) 1033 return -EINVAL; 1034 1035 if ((!p_dev->suspended) && !strncmp(buf, "off", 3)) 1036 ret = runtime_suspend(dev); 1037 else if (p_dev->suspended && !strncmp(buf, "on", 2)) 1038 ret = runtime_resume(dev); 1039 1040 return ret ? ret : count; 1041 } 1042 1043 1044 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf) 1045 { 1046 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1047 int i; 1048 u32 hash[4] = { 0, 0, 0, 0}; 1049 1050 /* calculate hashes */ 1051 for (i = 0; i < 4; i++) { 1052 if (!p_dev->prod_id[i]) 1053 continue; 1054 hash[i] = crc32(0, p_dev->prod_id[i], 1055 strlen(p_dev->prod_id[i])); 1056 } 1057 return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X" 1058 "pa%08Xpb%08Xpc%08Xpd%08X\n", 1059 p_dev->has_manf_id ? p_dev->manf_id : 0, 1060 p_dev->has_card_id ? p_dev->card_id : 0, 1061 p_dev->has_func_id ? p_dev->func_id : 0, 1062 p_dev->func, p_dev->device_no, 1063 hash[0], hash[1], hash[2], hash[3]); 1064 } 1065 1066 static ssize_t pcmcia_store_allow_func_id_match(struct device *dev, 1067 struct device_attribute *attr, const char *buf, size_t count) 1068 { 1069 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1070 1071 if (!count) 1072 return -EINVAL; 1073 1074 mutex_lock(&p_dev->socket->ops_mutex); 1075 p_dev->allow_func_id_match = 1; 1076 mutex_unlock(&p_dev->socket->ops_mutex); 1077 pcmcia_parse_uevents(p_dev->socket, PCMCIA_UEVENT_REQUERY); 1078 1079 return count; 1080 } 1081 1082 static struct device_attribute pcmcia_dev_attrs[] = { 1083 __ATTR(function, 0444, func_show, NULL), 1084 __ATTR(pm_state, 0644, pcmcia_show_pm_state, pcmcia_store_pm_state), 1085 __ATTR_RO(func_id), 1086 __ATTR_RO(manf_id), 1087 __ATTR_RO(card_id), 1088 __ATTR_RO(prod_id1), 1089 __ATTR_RO(prod_id2), 1090 __ATTR_RO(prod_id3), 1091 __ATTR_RO(prod_id4), 1092 __ATTR_RO(modalias), 1093 __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match), 1094 __ATTR_NULL, 1095 }; 1096 1097 /* PM support, also needed for reset */ 1098 1099 static int pcmcia_dev_suspend(struct device *dev, pm_message_t state) 1100 { 1101 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1102 struct pcmcia_driver *p_drv = NULL; 1103 int ret = 0; 1104 1105 mutex_lock(&p_dev->socket->ops_mutex); 1106 if (p_dev->suspended) { 1107 mutex_unlock(&p_dev->socket->ops_mutex); 1108 return 0; 1109 } 1110 p_dev->suspended = 1; 1111 mutex_unlock(&p_dev->socket->ops_mutex); 1112 1113 dev_dbg(dev, "suspending\n"); 1114 1115 if (dev->driver) 1116 p_drv = to_pcmcia_drv(dev->driver); 1117 1118 if (!p_drv) 1119 goto out; 1120 1121 if (p_drv->suspend) { 1122 ret = p_drv->suspend(p_dev); 1123 if (ret) { 1124 dev_printk(KERN_ERR, dev, 1125 "pcmcia: device %s (driver %s) did " 1126 "not want to go to sleep (%d)\n", 1127 p_dev->devname, p_drv->drv.name, ret); 1128 mutex_lock(&p_dev->socket->ops_mutex); 1129 p_dev->suspended = 0; 1130 mutex_unlock(&p_dev->socket->ops_mutex); 1131 goto out; 1132 } 1133 } 1134 1135 if (p_dev->device_no == p_dev->func) { 1136 dev_dbg(dev, "releasing configuration\n"); 1137 pcmcia_release_configuration(p_dev); 1138 } 1139 1140 out: 1141 return ret; 1142 } 1143 1144 1145 static int pcmcia_dev_resume(struct device *dev) 1146 { 1147 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1148 struct pcmcia_driver *p_drv = NULL; 1149 int ret = 0; 1150 1151 mutex_lock(&p_dev->socket->ops_mutex); 1152 if (!p_dev->suspended) { 1153 mutex_unlock(&p_dev->socket->ops_mutex); 1154 return 0; 1155 } 1156 p_dev->suspended = 0; 1157 mutex_unlock(&p_dev->socket->ops_mutex); 1158 1159 dev_dbg(dev, "resuming\n"); 1160 1161 if (dev->driver) 1162 p_drv = to_pcmcia_drv(dev->driver); 1163 1164 if (!p_drv) 1165 goto out; 1166 1167 if (p_dev->device_no == p_dev->func) { 1168 dev_dbg(dev, "requesting configuration\n"); 1169 ret = pcmcia_request_configuration(p_dev, &p_dev->conf); 1170 if (ret) 1171 goto out; 1172 } 1173 1174 if (p_drv->resume) 1175 ret = p_drv->resume(p_dev); 1176 1177 out: 1178 return ret; 1179 } 1180 1181 1182 static int pcmcia_bus_suspend_callback(struct device *dev, void * _data) 1183 { 1184 struct pcmcia_socket *skt = _data; 1185 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1186 1187 if (p_dev->socket != skt || p_dev->suspended) 1188 return 0; 1189 1190 return runtime_suspend(dev); 1191 } 1192 1193 static int pcmcia_bus_resume_callback(struct device *dev, void * _data) 1194 { 1195 struct pcmcia_socket *skt = _data; 1196 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1197 1198 if (p_dev->socket != skt || !p_dev->suspended) 1199 return 0; 1200 1201 runtime_resume(dev); 1202 1203 return 0; 1204 } 1205 1206 static int pcmcia_bus_resume(struct pcmcia_socket *skt) 1207 { 1208 dev_dbg(&skt->dev, "resuming socket %d\n", skt->sock); 1209 bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback); 1210 return 0; 1211 } 1212 1213 static int pcmcia_bus_suspend(struct pcmcia_socket *skt) 1214 { 1215 dev_dbg(&skt->dev, "suspending socket %d\n", skt->sock); 1216 if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt, 1217 pcmcia_bus_suspend_callback)) { 1218 pcmcia_bus_resume(skt); 1219 return -EIO; 1220 } 1221 return 0; 1222 } 1223 1224 1225 /*====================================================================== 1226 1227 The card status event handler. 1228 1229 ======================================================================*/ 1230 1231 /* Normally, the event is passed to individual drivers after 1232 * informing userspace. Only for CS_EVENT_CARD_REMOVAL this 1233 * is inversed to maintain historic compatibility. 1234 */ 1235 1236 static int ds_event(struct pcmcia_socket *skt, event_t event, int priority) 1237 { 1238 struct pcmcia_socket *s = pcmcia_get_socket(skt); 1239 1240 if (!s) { 1241 dev_printk(KERN_ERR, &skt->dev, 1242 "PCMCIA obtaining reference to socket " \ 1243 "failed, event 0x%x lost!\n", event); 1244 return -ENODEV; 1245 } 1246 1247 dev_dbg(&skt->dev, "ds_event(0x%06x, %d, 0x%p)\n", 1248 event, priority, skt); 1249 1250 switch (event) { 1251 case CS_EVENT_CARD_REMOVAL: 1252 mutex_lock(&s->ops_mutex); 1253 s->pcmcia_state.present = 0; 1254 mutex_unlock(&s->ops_mutex); 1255 pcmcia_card_remove(skt, NULL); 1256 handle_event(skt, event); 1257 mutex_lock(&s->ops_mutex); 1258 destroy_cis_cache(s); 1259 mutex_unlock(&s->ops_mutex); 1260 break; 1261 1262 case CS_EVENT_CARD_INSERTION: 1263 mutex_lock(&s->ops_mutex); 1264 s->pcmcia_state.has_pfc = 0; 1265 s->pcmcia_state.present = 1; 1266 destroy_cis_cache(s); /* to be on the safe side... */ 1267 mutex_unlock(&s->ops_mutex); 1268 pcmcia_card_add(skt); 1269 handle_event(skt, event); 1270 break; 1271 1272 case CS_EVENT_EJECTION_REQUEST: 1273 break; 1274 1275 case CS_EVENT_PM_RESUME: 1276 if (verify_cis_cache(skt) != 0) { 1277 dev_dbg(&skt->dev, "cis mismatch - different card\n"); 1278 /* first, remove the card */ 1279 ds_event(skt, CS_EVENT_CARD_REMOVAL, CS_EVENT_PRI_HIGH); 1280 mutex_lock(&s->ops_mutex); 1281 destroy_cis_cache(skt); 1282 kfree(skt->fake_cis); 1283 skt->fake_cis = NULL; 1284 mutex_unlock(&s->ops_mutex); 1285 /* now, add the new card */ 1286 ds_event(skt, CS_EVENT_CARD_INSERTION, 1287 CS_EVENT_PRI_LOW); 1288 } 1289 handle_event(skt, event); 1290 break; 1291 1292 case CS_EVENT_PM_SUSPEND: 1293 case CS_EVENT_RESET_PHYSICAL: 1294 case CS_EVENT_CARD_RESET: 1295 default: 1296 handle_event(skt, event); 1297 break; 1298 } 1299 1300 pcmcia_put_socket(s); 1301 1302 return 0; 1303 } /* ds_event */ 1304 1305 1306 struct pcmcia_device *pcmcia_dev_present(struct pcmcia_device *_p_dev) 1307 { 1308 struct pcmcia_device *p_dev; 1309 struct pcmcia_device *ret = NULL; 1310 1311 p_dev = pcmcia_get_dev(_p_dev); 1312 if (!p_dev) 1313 return NULL; 1314 1315 mutex_lock(&p_dev->socket->ops_mutex); 1316 if (!p_dev->socket->pcmcia_state.present) 1317 goto out; 1318 1319 if (p_dev->socket->pcmcia_state.dead) 1320 goto out; 1321 1322 if (p_dev->_removed) 1323 goto out; 1324 1325 if (p_dev->suspended) 1326 goto out; 1327 1328 ret = p_dev; 1329 out: 1330 mutex_unlock(&p_dev->socket->ops_mutex); 1331 pcmcia_put_dev(p_dev); 1332 return ret; 1333 } 1334 EXPORT_SYMBOL(pcmcia_dev_present); 1335 1336 1337 static struct pcmcia_callback pcmcia_bus_callback = { 1338 .owner = THIS_MODULE, 1339 .event = ds_event, 1340 .requery = pcmcia_requery, 1341 .validate = pccard_validate_cis, 1342 .suspend = pcmcia_bus_suspend, 1343 .resume = pcmcia_bus_resume, 1344 }; 1345 1346 static int __devinit pcmcia_bus_add_socket(struct device *dev, 1347 struct class_interface *class_intf) 1348 { 1349 struct pcmcia_socket *socket = dev_get_drvdata(dev); 1350 int ret; 1351 1352 socket = pcmcia_get_socket(socket); 1353 if (!socket) { 1354 dev_printk(KERN_ERR, dev, 1355 "PCMCIA obtaining reference to socket failed\n"); 1356 return -ENODEV; 1357 } 1358 1359 ret = sysfs_create_bin_file(&dev->kobj, &pccard_cis_attr); 1360 if (ret) { 1361 dev_printk(KERN_ERR, dev, "PCMCIA registration failed\n"); 1362 pcmcia_put_socket(socket); 1363 return ret; 1364 } 1365 1366 #ifdef CONFIG_PCMCIA_IOCTL 1367 init_waitqueue_head(&socket->queue); 1368 #endif 1369 INIT_LIST_HEAD(&socket->devices_list); 1370 memset(&socket->pcmcia_state, 0, sizeof(u8)); 1371 socket->device_count = 0; 1372 1373 ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback); 1374 if (ret) { 1375 dev_printk(KERN_ERR, dev, "PCMCIA registration failed\n"); 1376 pcmcia_put_socket(socket); 1377 return ret; 1378 } 1379 1380 return 0; 1381 } 1382 1383 static void pcmcia_bus_remove_socket(struct device *dev, 1384 struct class_interface *class_intf) 1385 { 1386 struct pcmcia_socket *socket = dev_get_drvdata(dev); 1387 1388 if (!socket) 1389 return; 1390 1391 mutex_lock(&socket->ops_mutex); 1392 socket->pcmcia_state.dead = 1; 1393 mutex_unlock(&socket->ops_mutex); 1394 1395 pccard_register_pcmcia(socket, NULL); 1396 1397 /* unregister any unbound devices */ 1398 mutex_lock(&socket->skt_mutex); 1399 pcmcia_card_remove(socket, NULL); 1400 release_cis_mem(socket); 1401 mutex_unlock(&socket->skt_mutex); 1402 1403 sysfs_remove_bin_file(&dev->kobj, &pccard_cis_attr); 1404 1405 pcmcia_put_socket(socket); 1406 1407 return; 1408 } 1409 1410 1411 /* the pcmcia_bus_interface is used to handle pcmcia socket devices */ 1412 static struct class_interface pcmcia_bus_interface __refdata = { 1413 .class = &pcmcia_socket_class, 1414 .add_dev = &pcmcia_bus_add_socket, 1415 .remove_dev = &pcmcia_bus_remove_socket, 1416 }; 1417 1418 1419 struct bus_type pcmcia_bus_type = { 1420 .name = "pcmcia", 1421 .uevent = pcmcia_bus_uevent, 1422 .match = pcmcia_bus_match, 1423 .dev_attrs = pcmcia_dev_attrs, 1424 .probe = pcmcia_device_probe, 1425 .remove = pcmcia_device_remove, 1426 .suspend = pcmcia_dev_suspend, 1427 .resume = pcmcia_dev_resume, 1428 }; 1429 1430 1431 static int __init init_pcmcia_bus(void) 1432 { 1433 int ret; 1434 1435 ret = bus_register(&pcmcia_bus_type); 1436 if (ret < 0) { 1437 printk(KERN_WARNING "pcmcia: bus_register error: %d\n", ret); 1438 return ret; 1439 } 1440 ret = class_interface_register(&pcmcia_bus_interface); 1441 if (ret < 0) { 1442 printk(KERN_WARNING 1443 "pcmcia: class_interface_register error: %d\n", ret); 1444 bus_unregister(&pcmcia_bus_type); 1445 return ret; 1446 } 1447 1448 pcmcia_setup_ioctl(); 1449 1450 return 0; 1451 } 1452 fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that 1453 * pcmcia_socket_class is already registered */ 1454 1455 1456 static void __exit exit_pcmcia_bus(void) 1457 { 1458 pcmcia_cleanup_ioctl(); 1459 1460 class_interface_unregister(&pcmcia_bus_interface); 1461 1462 bus_unregister(&pcmcia_bus_type); 1463 } 1464 module_exit(exit_pcmcia_bus); 1465 1466 1467 MODULE_ALIAS("ds"); 1468