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 dev_dbg(dev, "releasing device\n"); 241 pcmcia_put_socket(p_dev->socket); 242 kfree(p_dev->devname); 243 kref_put(&p_dev->function_config->ref, pcmcia_release_function); 244 kfree(p_dev); 245 } 246 247 static void pcmcia_add_device_later(struct pcmcia_socket *s, int mfc) 248 { 249 if (!s->pcmcia_state.device_add_pending) { 250 dev_dbg(&s->dev, "scheduling to add %s secondary" 251 " device to %d\n", mfc ? "mfc" : "pfc", s->sock); 252 s->pcmcia_state.device_add_pending = 1; 253 s->pcmcia_state.mfc_pfc = mfc; 254 schedule_work(&s->device_add); 255 } 256 return; 257 } 258 259 static int pcmcia_device_probe(struct device *dev) 260 { 261 struct pcmcia_device *p_dev; 262 struct pcmcia_driver *p_drv; 263 struct pcmcia_device_id *did; 264 struct pcmcia_socket *s; 265 cistpl_config_t cis_config; 266 int ret = 0; 267 268 dev = get_device(dev); 269 if (!dev) 270 return -ENODEV; 271 272 p_dev = to_pcmcia_dev(dev); 273 p_drv = to_pcmcia_drv(dev->driver); 274 s = p_dev->socket; 275 276 /* The PCMCIA code passes the match data in via dev_set_drvdata(dev) 277 * which is an ugly hack. Once the driver probe is called it may 278 * and often will overwrite the match data so we must save it first 279 * 280 * handle pseudo multifunction devices: 281 * there are at most two pseudo multifunction devices. 282 * if we're matching against the first, schedule a 283 * call which will then check whether there are two 284 * pseudo devices, and if not, add the second one. 285 */ 286 did = dev_get_drvdata(&p_dev->dev); 287 288 dev_dbg(dev, "trying to bind to %s\n", p_drv->drv.name); 289 290 if ((!p_drv->probe) || (!p_dev->function_config) || 291 (!try_module_get(p_drv->owner))) { 292 ret = -EINVAL; 293 goto put_dev; 294 } 295 296 /* set up some more device information */ 297 ret = pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_CONFIG, 298 &cis_config); 299 if (!ret) { 300 p_dev->conf.ConfigBase = cis_config.base; 301 p_dev->conf.Present = cis_config.rmask[0]; 302 } else { 303 dev_printk(KERN_INFO, dev, 304 "pcmcia: could not parse base and rmask0 of CIS\n"); 305 p_dev->conf.ConfigBase = 0; 306 p_dev->conf.Present = 0; 307 } 308 309 ret = p_drv->probe(p_dev); 310 if (ret) { 311 dev_dbg(dev, "binding to %s failed with %d\n", 312 p_drv->drv.name, ret); 313 goto put_module; 314 } 315 316 mutex_lock(&s->ops_mutex); 317 if (did && (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) && 318 (p_dev->socket->device_count == 1) && (p_dev->device_no == 0)) 319 pcmcia_add_device_later(p_dev->socket, 0); 320 mutex_unlock(&s->ops_mutex); 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; 339 340 dev_dbg(leftover ? &leftover->dev : &s->dev, 341 "pcmcia_card_remove(%d) %s\n", s->sock, 342 leftover ? leftover->devname : ""); 343 344 mutex_lock(&s->ops_mutex); 345 if (!leftover) 346 s->device_count = 0; 347 else 348 s->device_count = 1; 349 mutex_unlock(&s->ops_mutex); 350 351 /* unregister all pcmcia_devices registered with this socket, except leftover */ 352 list_for_each_entry_safe(p_dev, tmp, &s->devices_list, socket_device_list) { 353 if (p_dev == leftover) 354 continue; 355 356 mutex_lock(&s->ops_mutex); 357 list_del(&p_dev->socket_device_list); 358 p_dev->_removed = 1; 359 mutex_unlock(&s->ops_mutex); 360 361 dev_dbg(&p_dev->dev, "unregistering device\n"); 362 device_unregister(&p_dev->dev); 363 } 364 365 return; 366 } 367 368 static int pcmcia_device_remove(struct device *dev) 369 { 370 struct pcmcia_device *p_dev; 371 struct pcmcia_driver *p_drv; 372 struct pcmcia_device_id *did; 373 int i; 374 375 p_dev = to_pcmcia_dev(dev); 376 p_drv = to_pcmcia_drv(dev->driver); 377 378 dev_dbg(dev, "removing device\n"); 379 380 /* If we're removing the primary module driving a 381 * pseudo multi-function card, we need to unbind 382 * all devices 383 */ 384 did = dev_get_drvdata(&p_dev->dev); 385 if (did && (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) && 386 (p_dev->socket->device_count > 0) && 387 (p_dev->device_no == 0)) 388 pcmcia_card_remove(p_dev->socket, p_dev); 389 390 /* detach the "instance" */ 391 if (!p_drv) 392 return 0; 393 394 if (p_drv->remove) 395 p_drv->remove(p_dev); 396 397 p_dev->dev_node = NULL; 398 399 /* check for proper unloading */ 400 if (p_dev->_irq || p_dev->_io || p_dev->_locked) 401 dev_printk(KERN_INFO, dev, 402 "pcmcia: driver %s did not release config properly\n", 403 p_drv->drv.name); 404 405 for (i = 0; i < MAX_WIN; i++) 406 if (p_dev->_win & CLIENT_WIN_REQ(i)) 407 dev_printk(KERN_INFO, dev, 408 "pcmcia: driver %s did not release window properly\n", 409 p_drv->drv.name); 410 411 /* references from pcmcia_probe_device */ 412 pcmcia_put_dev(p_dev); 413 module_put(p_drv->owner); 414 415 return 0; 416 } 417 418 419 /* 420 * pcmcia_device_query -- determine information about a pcmcia device 421 */ 422 static int pcmcia_device_query(struct pcmcia_device *p_dev) 423 { 424 cistpl_manfid_t manf_id; 425 cistpl_funcid_t func_id; 426 cistpl_vers_1_t *vers1; 427 unsigned int i; 428 429 vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL); 430 if (!vers1) 431 return -ENOMEM; 432 433 if (!pccard_read_tuple(p_dev->socket, BIND_FN_ALL, 434 CISTPL_MANFID, &manf_id)) { 435 p_dev->manf_id = manf_id.manf; 436 p_dev->card_id = manf_id.card; 437 p_dev->has_manf_id = 1; 438 p_dev->has_card_id = 1; 439 } 440 441 if (!pccard_read_tuple(p_dev->socket, p_dev->func, 442 CISTPL_FUNCID, &func_id)) { 443 p_dev->func_id = func_id.func; 444 p_dev->has_func_id = 1; 445 } else { 446 /* rule of thumb: cards with no FUNCID, but with 447 * common memory device geometry information, are 448 * probably memory cards (from pcmcia-cs) */ 449 cistpl_device_geo_t *devgeo; 450 451 devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL); 452 if (!devgeo) { 453 kfree(vers1); 454 return -ENOMEM; 455 } 456 if (!pccard_read_tuple(p_dev->socket, p_dev->func, 457 CISTPL_DEVICE_GEO, devgeo)) { 458 dev_dbg(&p_dev->dev, 459 "mem device geometry probably means " 460 "FUNCID_MEMORY\n"); 461 p_dev->func_id = CISTPL_FUNCID_MEMORY; 462 p_dev->has_func_id = 1; 463 } 464 kfree(devgeo); 465 } 466 467 if (!pccard_read_tuple(p_dev->socket, BIND_FN_ALL, CISTPL_VERS_1, 468 vers1)) { 469 for (i = 0; i < min_t(unsigned int, 4, vers1->ns); i++) { 470 char *tmp; 471 unsigned int length; 472 473 tmp = vers1->str + vers1->ofs[i]; 474 475 length = strlen(tmp) + 1; 476 if ((length < 2) || (length > 255)) 477 continue; 478 479 p_dev->prod_id[i] = kmalloc(sizeof(char) * length, 480 GFP_KERNEL); 481 if (!p_dev->prod_id[i]) 482 continue; 483 484 p_dev->prod_id[i] = strncpy(p_dev->prod_id[i], 485 tmp, length); 486 } 487 } 488 489 kfree(vers1); 490 return 0; 491 } 492 493 494 /* device_add_lock is needed to avoid double registration by cardmgr and kernel. 495 * Serializes pcmcia_device_add; will most likely be removed in future. 496 * 497 * While it has the caveat that adding new PCMCIA devices inside(!) device_register() 498 * won't work, this doesn't matter much at the moment: the driver core doesn't 499 * support it either. 500 */ 501 static DEFINE_MUTEX(device_add_lock); 502 503 struct pcmcia_device *pcmcia_device_add(struct pcmcia_socket *s, unsigned int function) 504 { 505 struct pcmcia_device *p_dev, *tmp_dev; 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 p_dev = kzalloc(sizeof(struct pcmcia_device), GFP_KERNEL); 516 if (!p_dev) 517 goto err_put; 518 519 mutex_lock(&s->ops_mutex); 520 p_dev->device_no = (s->device_count++); 521 mutex_unlock(&s->ops_mutex); 522 523 /* max of 4 devices per card */ 524 if (p_dev->device_no >= 4) 525 goto err_free; 526 527 p_dev->socket = s; 528 p_dev->func = function; 529 530 p_dev->dev.bus = &pcmcia_bus_type; 531 p_dev->dev.parent = s->dev.parent; 532 p_dev->dev.release = pcmcia_release_dev; 533 /* by default don't allow DMA */ 534 p_dev->dma_mask = DMA_MASK_NONE; 535 p_dev->dev.dma_mask = &p_dev->dma_mask; 536 dev_set_name(&p_dev->dev, "%d.%d", p_dev->socket->sock, p_dev->device_no); 537 if (!dev_name(&p_dev->dev)) 538 goto err_free; 539 p_dev->devname = kasprintf(GFP_KERNEL, "pcmcia%s", dev_name(&p_dev->dev)); 540 if (!p_dev->devname) 541 goto err_free; 542 dev_dbg(&p_dev->dev, "devname is %s\n", p_dev->devname); 543 544 mutex_lock(&s->ops_mutex); 545 546 /* 547 * p_dev->function_config must be the same for all card functions. 548 * Note that this is serialized by the device_add_lock, so that 549 * only one such struct will be created. 550 */ 551 list_for_each_entry(tmp_dev, &s->devices_list, socket_device_list) 552 if (p_dev->func == tmp_dev->func) { 553 p_dev->function_config = tmp_dev->function_config; 554 p_dev->io = tmp_dev->io; 555 p_dev->irq = tmp_dev->irq; 556 kref_get(&p_dev->function_config->ref); 557 } 558 559 /* Add to the list in pcmcia_bus_socket */ 560 list_add(&p_dev->socket_device_list, &s->devices_list); 561 562 mutex_unlock(&s->ops_mutex); 563 564 if (!p_dev->function_config) { 565 dev_dbg(&p_dev->dev, "creating config_t\n"); 566 p_dev->function_config = kzalloc(sizeof(struct config_t), 567 GFP_KERNEL); 568 if (!p_dev->function_config) 569 goto err_unreg; 570 kref_init(&p_dev->function_config->ref); 571 } 572 573 dev_printk(KERN_NOTICE, &p_dev->dev, 574 "pcmcia: registering new device %s\n", 575 p_dev->devname); 576 577 pcmcia_device_query(p_dev); 578 579 if (device_register(&p_dev->dev)) 580 goto err_unreg; 581 582 mutex_unlock(&device_add_lock); 583 584 return p_dev; 585 586 err_unreg: 587 mutex_lock(&s->ops_mutex); 588 list_del(&p_dev->socket_device_list); 589 mutex_unlock(&s->ops_mutex); 590 591 err_free: 592 mutex_lock(&s->ops_mutex); 593 s->device_count--; 594 mutex_unlock(&s->ops_mutex); 595 596 kfree(p_dev->devname); 597 kfree(p_dev); 598 err_put: 599 mutex_unlock(&device_add_lock); 600 pcmcia_put_socket(s); 601 602 return NULL; 603 } 604 605 606 static int pcmcia_card_add(struct pcmcia_socket *s) 607 { 608 cistpl_longlink_mfc_t mfc; 609 unsigned int no_funcs, i, no_chains; 610 int ret = -EAGAIN; 611 612 mutex_lock(&s->ops_mutex); 613 if (!(s->resource_setup_done)) { 614 dev_dbg(&s->dev, 615 "no resources available, delaying card_add\n"); 616 mutex_unlock(&s->ops_mutex); 617 return -EAGAIN; /* try again, but later... */ 618 } 619 620 if (pcmcia_validate_mem(s)) { 621 dev_dbg(&s->dev, "validating mem resources failed, " 622 "delaying card_add\n"); 623 mutex_unlock(&s->ops_mutex); 624 return -EAGAIN; /* try again, but later... */ 625 } 626 mutex_unlock(&s->ops_mutex); 627 628 ret = pccard_validate_cis(s, &no_chains); 629 if (ret || !no_chains) { 630 dev_dbg(&s->dev, "invalid CIS or invalid resources\n"); 631 return -ENODEV; 632 } 633 634 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc)) 635 no_funcs = mfc.nfn; 636 else 637 no_funcs = 1; 638 s->functions = no_funcs; 639 640 for (i = 0; i < no_funcs; i++) 641 pcmcia_device_add(s, i); 642 643 return ret; 644 } 645 646 647 static void pcmcia_delayed_add_device(struct work_struct *work) 648 { 649 struct pcmcia_socket *s = 650 container_of(work, struct pcmcia_socket, device_add); 651 u8 mfc_pfc; 652 653 mutex_lock(&s->ops_mutex); 654 mfc_pfc = s->pcmcia_state.mfc_pfc; 655 s->pcmcia_state.device_add_pending = 0; 656 s->pcmcia_state.mfc_pfc = 0; 657 mutex_unlock(&s->ops_mutex); 658 659 dev_dbg(&s->dev, "adding additional device to %d\n", s->sock); 660 pcmcia_device_add(s, mfc_pfc); 661 } 662 663 static int pcmcia_requery(struct device *dev, void * _data) 664 { 665 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 666 if (!p_dev->dev.driver) { 667 dev_dbg(dev, "update device information\n"); 668 pcmcia_device_query(p_dev); 669 } 670 671 return 0; 672 } 673 674 static void pcmcia_bus_rescan(struct pcmcia_socket *skt, int new_cis) 675 { 676 int no_devices = 0; 677 int ret = 0; 678 679 /* must be called with skt_mutex held */ 680 dev_dbg(&skt->dev, "re-scanning socket %d\n", skt->sock); 681 682 mutex_lock(&skt->ops_mutex); 683 if (list_empty(&skt->devices_list)) 684 no_devices = 1; 685 mutex_unlock(&skt->ops_mutex); 686 687 /* If this is because of a CIS override, start over */ 688 if (new_cis && !no_devices) 689 pcmcia_card_remove(skt, NULL); 690 691 /* if no devices were added for this socket yet because of 692 * missing resource information or other trouble, we need to 693 * do this now. */ 694 if (no_devices || new_cis) { 695 ret = pcmcia_card_add(skt); 696 if (ret) 697 return; 698 } 699 700 /* some device information might have changed because of a CIS 701 * update or because we can finally read it correctly... so 702 * determine it again, overwriting old values if necessary. */ 703 bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery); 704 705 /* we re-scan all devices, not just the ones connected to this 706 * socket. This does not matter, though. */ 707 ret = bus_rescan_devices(&pcmcia_bus_type); 708 if (ret) 709 printk(KERN_INFO "pcmcia: bus_rescan_devices failed\n"); 710 } 711 712 #ifdef CONFIG_PCMCIA_LOAD_CIS 713 714 /** 715 * pcmcia_load_firmware - load CIS from userspace if device-provided is broken 716 * @dev: the pcmcia device which needs a CIS override 717 * @filename: requested filename in /lib/firmware/ 718 * 719 * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if 720 * the one provided by the card is broken. The firmware files reside in 721 * /lib/firmware/ in userspace. 722 */ 723 static int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename) 724 { 725 struct pcmcia_socket *s = dev->socket; 726 const struct firmware *fw; 727 int ret = -ENOMEM; 728 int no_funcs; 729 int old_funcs; 730 cistpl_longlink_mfc_t mfc; 731 732 if (!filename) 733 return -EINVAL; 734 735 dev_dbg(&dev->dev, "trying to load CIS file %s\n", filename); 736 737 if (request_firmware(&fw, filename, &dev->dev) == 0) { 738 if (fw->size >= CISTPL_MAX_CIS_SIZE) { 739 ret = -EINVAL; 740 dev_printk(KERN_ERR, &dev->dev, 741 "pcmcia: CIS override is too big\n"); 742 goto release; 743 } 744 745 if (!pcmcia_replace_cis(s, fw->data, fw->size)) 746 ret = 0; 747 else { 748 dev_printk(KERN_ERR, &dev->dev, 749 "pcmcia: CIS override failed\n"); 750 goto release; 751 } 752 753 754 /* update information */ 755 pcmcia_device_query(dev); 756 757 /* does this cis override add or remove functions? */ 758 old_funcs = s->functions; 759 760 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc)) 761 no_funcs = mfc.nfn; 762 else 763 no_funcs = 1; 764 s->functions = no_funcs; 765 766 if (old_funcs > no_funcs) 767 pcmcia_card_remove(s, dev); 768 else if (no_funcs > old_funcs) { 769 mutex_lock(&s->ops_mutex); 770 pcmcia_add_device_later(s, 1); 771 mutex_unlock(&s->ops_mutex); 772 } 773 } 774 release: 775 release_firmware(fw); 776 777 return ret; 778 } 779 780 #else /* !CONFIG_PCMCIA_LOAD_CIS */ 781 782 static inline int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename) 783 { 784 return -ENODEV; 785 } 786 787 #endif 788 789 790 static inline int pcmcia_devmatch(struct pcmcia_device *dev, 791 struct pcmcia_device_id *did) 792 { 793 if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) { 794 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id)) 795 return 0; 796 } 797 798 if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) { 799 if ((!dev->has_card_id) || (dev->card_id != did->card_id)) 800 return 0; 801 } 802 803 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) { 804 if (dev->func != did->function) 805 return 0; 806 } 807 808 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) { 809 if (!dev->prod_id[0]) 810 return 0; 811 if (strcmp(did->prod_id[0], dev->prod_id[0])) 812 return 0; 813 } 814 815 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) { 816 if (!dev->prod_id[1]) 817 return 0; 818 if (strcmp(did->prod_id[1], dev->prod_id[1])) 819 return 0; 820 } 821 822 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) { 823 if (!dev->prod_id[2]) 824 return 0; 825 if (strcmp(did->prod_id[2], dev->prod_id[2])) 826 return 0; 827 } 828 829 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) { 830 if (!dev->prod_id[3]) 831 return 0; 832 if (strcmp(did->prod_id[3], dev->prod_id[3])) 833 return 0; 834 } 835 836 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) { 837 if (dev->device_no != did->device_no) 838 return 0; 839 } 840 841 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) { 842 int ret; 843 844 if ((!dev->has_func_id) || (dev->func_id != did->func_id)) 845 return 0; 846 847 /* if this is a pseudo-multi-function device, 848 * we need explicit matches */ 849 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) 850 return 0; 851 if (dev->device_no) 852 return 0; 853 854 /* also, FUNC_ID matching needs to be activated by userspace 855 * after it has re-checked that there is no possible module 856 * with a prod_id/manf_id/card_id match. 857 */ 858 mutex_lock(&dev->socket->ops_mutex); 859 ret = dev->allow_func_id_match; 860 mutex_unlock(&dev->socket->ops_mutex); 861 862 if (!ret) { 863 dev_dbg(&dev->dev, 864 "skipping FUNC_ID match until userspace ACK\n"); 865 return 0; 866 } 867 } 868 869 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) { 870 dev_dbg(&dev->dev, "device needs a fake CIS\n"); 871 if (!dev->socket->fake_cis) 872 pcmcia_load_firmware(dev, did->cisfile); 873 874 if (!dev->socket->fake_cis) 875 return 0; 876 } 877 878 if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) { 879 int i; 880 for (i = 0; i < 4; i++) 881 if (dev->prod_id[i]) 882 return 0; 883 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id) 884 return 0; 885 } 886 887 dev_set_drvdata(&dev->dev, did); 888 889 return 1; 890 } 891 892 893 static int pcmcia_bus_match(struct device *dev, struct device_driver *drv) 894 { 895 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 896 struct pcmcia_driver *p_drv = to_pcmcia_drv(drv); 897 struct pcmcia_device_id *did = p_drv->id_table; 898 struct pcmcia_dynid *dynid; 899 900 /* match dynamic devices first */ 901 mutex_lock(&p_drv->dynids.lock); 902 list_for_each_entry(dynid, &p_drv->dynids.list, node) { 903 dev_dbg(dev, "trying to match to %s\n", drv->name); 904 if (pcmcia_devmatch(p_dev, &dynid->id)) { 905 dev_dbg(dev, "matched to %s\n", drv->name); 906 mutex_unlock(&p_drv->dynids.lock); 907 return 1; 908 } 909 } 910 mutex_unlock(&p_drv->dynids.lock); 911 912 #ifdef CONFIG_PCMCIA_IOCTL 913 /* matching by cardmgr */ 914 if (p_dev->cardmgr == p_drv) { 915 dev_dbg(dev, "cardmgr matched to %s\n", drv->name); 916 return 1; 917 } 918 #endif 919 920 while (did && did->match_flags) { 921 dev_dbg(dev, "trying to match to %s\n", drv->name); 922 if (pcmcia_devmatch(p_dev, did)) { 923 dev_dbg(dev, "matched to %s\n", drv->name); 924 return 1; 925 } 926 did++; 927 } 928 929 return 0; 930 } 931 932 #ifdef CONFIG_HOTPLUG 933 934 static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env) 935 { 936 struct pcmcia_device *p_dev; 937 int i; 938 u32 hash[4] = { 0, 0, 0, 0}; 939 940 if (!dev) 941 return -ENODEV; 942 943 p_dev = to_pcmcia_dev(dev); 944 945 /* calculate hashes */ 946 for (i = 0; i < 4; i++) { 947 if (!p_dev->prod_id[i]) 948 continue; 949 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i])); 950 } 951 952 if (add_uevent_var(env, "SOCKET_NO=%u", p_dev->socket->sock)) 953 return -ENOMEM; 954 955 if (add_uevent_var(env, "DEVICE_NO=%02X", p_dev->device_no)) 956 return -ENOMEM; 957 958 if (add_uevent_var(env, "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X" 959 "pa%08Xpb%08Xpc%08Xpd%08X", 960 p_dev->has_manf_id ? p_dev->manf_id : 0, 961 p_dev->has_card_id ? p_dev->card_id : 0, 962 p_dev->has_func_id ? p_dev->func_id : 0, 963 p_dev->func, 964 p_dev->device_no, 965 hash[0], 966 hash[1], 967 hash[2], 968 hash[3])) 969 return -ENOMEM; 970 971 return 0; 972 } 973 974 #else 975 976 static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env) 977 { 978 return -ENODEV; 979 } 980 981 #endif 982 983 /************************ runtime PM support ***************************/ 984 985 static int pcmcia_dev_suspend(struct device *dev, pm_message_t state); 986 static int pcmcia_dev_resume(struct device *dev); 987 988 static int runtime_suspend(struct device *dev) 989 { 990 int rc; 991 992 down(&dev->sem); 993 rc = pcmcia_dev_suspend(dev, PMSG_SUSPEND); 994 up(&dev->sem); 995 return rc; 996 } 997 998 static int runtime_resume(struct device *dev) 999 { 1000 int rc; 1001 1002 down(&dev->sem); 1003 rc = pcmcia_dev_resume(dev); 1004 up(&dev->sem); 1005 return rc; 1006 } 1007 1008 /************************ per-device sysfs output ***************************/ 1009 1010 #define pcmcia_device_attr(field, test, format) \ 1011 static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf) \ 1012 { \ 1013 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \ 1014 return p_dev->test ? sprintf(buf, format, p_dev->field) : -ENODEV; \ 1015 } 1016 1017 #define pcmcia_device_stringattr(name, field) \ 1018 static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf) \ 1019 { \ 1020 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \ 1021 return p_dev->field ? sprintf(buf, "%s\n", p_dev->field) : -ENODEV; \ 1022 } 1023 1024 pcmcia_device_attr(func, socket, "0x%02x\n"); 1025 pcmcia_device_attr(func_id, has_func_id, "0x%02x\n"); 1026 pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n"); 1027 pcmcia_device_attr(card_id, has_card_id, "0x%04x\n"); 1028 pcmcia_device_stringattr(prod_id1, prod_id[0]); 1029 pcmcia_device_stringattr(prod_id2, prod_id[1]); 1030 pcmcia_device_stringattr(prod_id3, prod_id[2]); 1031 pcmcia_device_stringattr(prod_id4, prod_id[3]); 1032 1033 1034 static ssize_t pcmcia_show_pm_state(struct device *dev, struct device_attribute *attr, char *buf) 1035 { 1036 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1037 1038 if (p_dev->suspended) 1039 return sprintf(buf, "off\n"); 1040 else 1041 return sprintf(buf, "on\n"); 1042 } 1043 1044 static ssize_t pcmcia_store_pm_state(struct device *dev, struct device_attribute *attr, 1045 const char *buf, size_t count) 1046 { 1047 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1048 int ret = 0; 1049 1050 if (!count) 1051 return -EINVAL; 1052 1053 if ((!p_dev->suspended) && !strncmp(buf, "off", 3)) 1054 ret = runtime_suspend(dev); 1055 else if (p_dev->suspended && !strncmp(buf, "on", 2)) 1056 ret = runtime_resume(dev); 1057 1058 return ret ? ret : count; 1059 } 1060 1061 1062 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf) 1063 { 1064 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1065 int i; 1066 u32 hash[4] = { 0, 0, 0, 0}; 1067 1068 /* calculate hashes */ 1069 for (i = 0; i < 4; i++) { 1070 if (!p_dev->prod_id[i]) 1071 continue; 1072 hash[i] = crc32(0, p_dev->prod_id[i], 1073 strlen(p_dev->prod_id[i])); 1074 } 1075 return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X" 1076 "pa%08Xpb%08Xpc%08Xpd%08X\n", 1077 p_dev->has_manf_id ? p_dev->manf_id : 0, 1078 p_dev->has_card_id ? p_dev->card_id : 0, 1079 p_dev->has_func_id ? p_dev->func_id : 0, 1080 p_dev->func, p_dev->device_no, 1081 hash[0], hash[1], hash[2], hash[3]); 1082 } 1083 1084 static ssize_t pcmcia_store_allow_func_id_match(struct device *dev, 1085 struct device_attribute *attr, const char *buf, size_t count) 1086 { 1087 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1088 int ret; 1089 1090 if (!count) 1091 return -EINVAL; 1092 1093 mutex_lock(&p_dev->socket->ops_mutex); 1094 p_dev->allow_func_id_match = 1; 1095 mutex_unlock(&p_dev->socket->ops_mutex); 1096 1097 ret = bus_rescan_devices(&pcmcia_bus_type); 1098 if (ret) 1099 printk(KERN_INFO "pcmcia: bus_rescan_devices failed after " 1100 "allowing func_id matches\n"); 1101 1102 return count; 1103 } 1104 1105 static struct device_attribute pcmcia_dev_attrs[] = { 1106 __ATTR(function, 0444, func_show, NULL), 1107 __ATTR(pm_state, 0644, pcmcia_show_pm_state, pcmcia_store_pm_state), 1108 __ATTR_RO(func_id), 1109 __ATTR_RO(manf_id), 1110 __ATTR_RO(card_id), 1111 __ATTR_RO(prod_id1), 1112 __ATTR_RO(prod_id2), 1113 __ATTR_RO(prod_id3), 1114 __ATTR_RO(prod_id4), 1115 __ATTR_RO(modalias), 1116 __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match), 1117 __ATTR_NULL, 1118 }; 1119 1120 /* PM support, also needed for reset */ 1121 1122 static int pcmcia_dev_suspend(struct device *dev, pm_message_t state) 1123 { 1124 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1125 struct pcmcia_driver *p_drv = NULL; 1126 int ret = 0; 1127 1128 mutex_lock(&p_dev->socket->ops_mutex); 1129 if (p_dev->suspended) { 1130 mutex_unlock(&p_dev->socket->ops_mutex); 1131 return 0; 1132 } 1133 p_dev->suspended = 1; 1134 mutex_unlock(&p_dev->socket->ops_mutex); 1135 1136 dev_dbg(dev, "suspending\n"); 1137 1138 if (dev->driver) 1139 p_drv = to_pcmcia_drv(dev->driver); 1140 1141 if (!p_drv) 1142 goto out; 1143 1144 if (p_drv->suspend) { 1145 ret = p_drv->suspend(p_dev); 1146 if (ret) { 1147 dev_printk(KERN_ERR, dev, 1148 "pcmcia: device %s (driver %s) did " 1149 "not want to go to sleep (%d)\n", 1150 p_dev->devname, p_drv->drv.name, ret); 1151 mutex_lock(&p_dev->socket->ops_mutex); 1152 p_dev->suspended = 0; 1153 mutex_unlock(&p_dev->socket->ops_mutex); 1154 goto out; 1155 } 1156 } 1157 1158 if (p_dev->device_no == p_dev->func) { 1159 dev_dbg(dev, "releasing configuration\n"); 1160 pcmcia_release_configuration(p_dev); 1161 } 1162 1163 out: 1164 return ret; 1165 } 1166 1167 1168 static int pcmcia_dev_resume(struct device *dev) 1169 { 1170 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1171 struct pcmcia_driver *p_drv = NULL; 1172 int ret = 0; 1173 1174 mutex_lock(&p_dev->socket->ops_mutex); 1175 if (!p_dev->suspended) { 1176 mutex_unlock(&p_dev->socket->ops_mutex); 1177 return 0; 1178 } 1179 p_dev->suspended = 0; 1180 mutex_unlock(&p_dev->socket->ops_mutex); 1181 1182 dev_dbg(dev, "resuming\n"); 1183 1184 if (dev->driver) 1185 p_drv = to_pcmcia_drv(dev->driver); 1186 1187 if (!p_drv) 1188 goto out; 1189 1190 if (p_dev->device_no == p_dev->func) { 1191 dev_dbg(dev, "requesting configuration\n"); 1192 ret = pcmcia_request_configuration(p_dev, &p_dev->conf); 1193 if (ret) 1194 goto out; 1195 } 1196 1197 if (p_drv->resume) 1198 ret = p_drv->resume(p_dev); 1199 1200 out: 1201 return ret; 1202 } 1203 1204 1205 static int pcmcia_bus_suspend_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 return runtime_suspend(dev); 1214 } 1215 1216 static int pcmcia_bus_resume_callback(struct device *dev, void * _data) 1217 { 1218 struct pcmcia_socket *skt = _data; 1219 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1220 1221 if (p_dev->socket != skt || !p_dev->suspended) 1222 return 0; 1223 1224 runtime_resume(dev); 1225 1226 return 0; 1227 } 1228 1229 static int pcmcia_bus_resume(struct pcmcia_socket *skt) 1230 { 1231 dev_dbg(&skt->dev, "resuming socket %d\n", skt->sock); 1232 bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback); 1233 return 0; 1234 } 1235 1236 static int pcmcia_bus_suspend(struct pcmcia_socket *skt) 1237 { 1238 dev_dbg(&skt->dev, "suspending socket %d\n", skt->sock); 1239 if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt, 1240 pcmcia_bus_suspend_callback)) { 1241 pcmcia_bus_resume(skt); 1242 return -EIO; 1243 } 1244 return 0; 1245 } 1246 1247 1248 /*====================================================================== 1249 1250 The card status event handler. 1251 1252 ======================================================================*/ 1253 1254 /* Normally, the event is passed to individual drivers after 1255 * informing userspace. Only for CS_EVENT_CARD_REMOVAL this 1256 * is inversed to maintain historic compatibility. 1257 */ 1258 1259 static int ds_event(struct pcmcia_socket *skt, event_t event, int priority) 1260 { 1261 struct pcmcia_socket *s = pcmcia_get_socket(skt); 1262 1263 if (!s) { 1264 dev_printk(KERN_ERR, &skt->dev, 1265 "PCMCIA obtaining reference to socket " \ 1266 "failed, event 0x%x lost!\n", event); 1267 return -ENODEV; 1268 } 1269 1270 dev_dbg(&skt->dev, "ds_event(0x%06x, %d, 0x%p)\n", 1271 event, priority, skt); 1272 1273 switch (event) { 1274 case CS_EVENT_CARD_REMOVAL: 1275 mutex_lock(&s->ops_mutex); 1276 s->pcmcia_state.present = 0; 1277 mutex_unlock(&s->ops_mutex); 1278 pcmcia_card_remove(skt, NULL); 1279 handle_event(skt, event); 1280 mutex_lock(&s->ops_mutex); 1281 destroy_cis_cache(s); 1282 mutex_unlock(&s->ops_mutex); 1283 break; 1284 1285 case CS_EVENT_CARD_INSERTION: 1286 mutex_lock(&s->ops_mutex); 1287 s->pcmcia_state.present = 1; 1288 destroy_cis_cache(s); /* to be on the safe side... */ 1289 mutex_unlock(&s->ops_mutex); 1290 pcmcia_card_add(skt); 1291 handle_event(skt, event); 1292 break; 1293 1294 case CS_EVENT_EJECTION_REQUEST: 1295 break; 1296 1297 case CS_EVENT_PM_RESUME: 1298 if (verify_cis_cache(skt) != 0) { 1299 dev_dbg(&skt->dev, "cis mismatch - different card\n"); 1300 /* first, remove the card */ 1301 ds_event(skt, CS_EVENT_CARD_REMOVAL, CS_EVENT_PRI_HIGH); 1302 mutex_lock(&s->ops_mutex); 1303 destroy_cis_cache(skt); 1304 kfree(skt->fake_cis); 1305 skt->fake_cis = NULL; 1306 mutex_unlock(&s->ops_mutex); 1307 /* now, add the new card */ 1308 ds_event(skt, CS_EVENT_CARD_INSERTION, 1309 CS_EVENT_PRI_LOW); 1310 } 1311 handle_event(skt, event); 1312 break; 1313 1314 case CS_EVENT_PM_SUSPEND: 1315 case CS_EVENT_RESET_PHYSICAL: 1316 case CS_EVENT_CARD_RESET: 1317 default: 1318 handle_event(skt, event); 1319 break; 1320 } 1321 1322 pcmcia_put_socket(s); 1323 1324 return 0; 1325 } /* ds_event */ 1326 1327 1328 struct pcmcia_device *pcmcia_dev_present(struct pcmcia_device *_p_dev) 1329 { 1330 struct pcmcia_device *p_dev; 1331 struct pcmcia_device *ret = NULL; 1332 1333 p_dev = pcmcia_get_dev(_p_dev); 1334 if (!p_dev) 1335 return NULL; 1336 1337 mutex_lock(&p_dev->socket->ops_mutex); 1338 if (!p_dev->socket->pcmcia_state.present) 1339 goto out; 1340 1341 if (p_dev->socket->pcmcia_state.dead) 1342 goto out; 1343 1344 if (p_dev->_removed) 1345 goto out; 1346 1347 if (p_dev->suspended) 1348 goto out; 1349 1350 ret = p_dev; 1351 out: 1352 mutex_unlock(&p_dev->socket->ops_mutex); 1353 pcmcia_put_dev(p_dev); 1354 return ret; 1355 } 1356 EXPORT_SYMBOL(pcmcia_dev_present); 1357 1358 1359 static struct pcmcia_callback pcmcia_bus_callback = { 1360 .owner = THIS_MODULE, 1361 .event = ds_event, 1362 .requery = pcmcia_bus_rescan, 1363 .validate = pccard_validate_cis, 1364 .suspend = pcmcia_bus_suspend, 1365 .resume = pcmcia_bus_resume, 1366 }; 1367 1368 static int __devinit pcmcia_bus_add_socket(struct device *dev, 1369 struct class_interface *class_intf) 1370 { 1371 struct pcmcia_socket *socket = dev_get_drvdata(dev); 1372 int ret; 1373 1374 socket = pcmcia_get_socket(socket); 1375 if (!socket) { 1376 dev_printk(KERN_ERR, dev, 1377 "PCMCIA obtaining reference to socket failed\n"); 1378 return -ENODEV; 1379 } 1380 1381 /* 1382 * Ugly. But we want to wait for the socket threads to have started up. 1383 * We really should let the drivers themselves drive some of this.. 1384 */ 1385 msleep(250); 1386 1387 ret = sysfs_create_bin_file(&dev->kobj, &pccard_cis_attr); 1388 if (ret) { 1389 dev_printk(KERN_ERR, dev, "PCMCIA registration failed\n"); 1390 pcmcia_put_socket(socket); 1391 return ret; 1392 } 1393 1394 #ifdef CONFIG_PCMCIA_IOCTL 1395 init_waitqueue_head(&socket->queue); 1396 #endif 1397 INIT_LIST_HEAD(&socket->devices_list); 1398 INIT_WORK(&socket->device_add, pcmcia_delayed_add_device); 1399 memset(&socket->pcmcia_state, 0, sizeof(u8)); 1400 socket->device_count = 0; 1401 1402 ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback); 1403 if (ret) { 1404 dev_printk(KERN_ERR, dev, "PCMCIA registration failed\n"); 1405 pcmcia_put_socket(socket); 1406 return ret; 1407 } 1408 1409 return 0; 1410 } 1411 1412 static void pcmcia_bus_remove_socket(struct device *dev, 1413 struct class_interface *class_intf) 1414 { 1415 struct pcmcia_socket *socket = dev_get_drvdata(dev); 1416 1417 if (!socket) 1418 return; 1419 1420 mutex_lock(&socket->ops_mutex); 1421 socket->pcmcia_state.dead = 1; 1422 mutex_unlock(&socket->ops_mutex); 1423 1424 pccard_register_pcmcia(socket, NULL); 1425 1426 /* unregister any unbound devices */ 1427 mutex_lock(&socket->skt_mutex); 1428 pcmcia_card_remove(socket, NULL); 1429 release_cis_mem(socket); 1430 mutex_unlock(&socket->skt_mutex); 1431 1432 sysfs_remove_bin_file(&dev->kobj, &pccard_cis_attr); 1433 1434 pcmcia_put_socket(socket); 1435 1436 return; 1437 } 1438 1439 1440 /* the pcmcia_bus_interface is used to handle pcmcia socket devices */ 1441 static struct class_interface pcmcia_bus_interface __refdata = { 1442 .class = &pcmcia_socket_class, 1443 .add_dev = &pcmcia_bus_add_socket, 1444 .remove_dev = &pcmcia_bus_remove_socket, 1445 }; 1446 1447 1448 struct bus_type pcmcia_bus_type = { 1449 .name = "pcmcia", 1450 .uevent = pcmcia_bus_uevent, 1451 .match = pcmcia_bus_match, 1452 .dev_attrs = pcmcia_dev_attrs, 1453 .probe = pcmcia_device_probe, 1454 .remove = pcmcia_device_remove, 1455 .suspend = pcmcia_dev_suspend, 1456 .resume = pcmcia_dev_resume, 1457 }; 1458 1459 1460 static int __init init_pcmcia_bus(void) 1461 { 1462 int ret; 1463 1464 ret = bus_register(&pcmcia_bus_type); 1465 if (ret < 0) { 1466 printk(KERN_WARNING "pcmcia: bus_register error: %d\n", ret); 1467 return ret; 1468 } 1469 ret = class_interface_register(&pcmcia_bus_interface); 1470 if (ret < 0) { 1471 printk(KERN_WARNING 1472 "pcmcia: class_interface_register error: %d\n", ret); 1473 bus_unregister(&pcmcia_bus_type); 1474 return ret; 1475 } 1476 1477 pcmcia_setup_ioctl(); 1478 1479 return 0; 1480 } 1481 fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that 1482 * pcmcia_socket_class is already registered */ 1483 1484 1485 static void __exit exit_pcmcia_bus(void) 1486 { 1487 pcmcia_cleanup_ioctl(); 1488 1489 class_interface_unregister(&pcmcia_bus_interface); 1490 1491 bus_unregister(&pcmcia_bus_type); 1492 } 1493 module_exit(exit_pcmcia_bus); 1494 1495 1496 MODULE_ALIAS("ds"); 1497