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/cistpl.h> 30#include <pcmcia/ds.h> 31#include <pcmcia/ss.h> 32 33#include "cs_internal.h" 34 35/*====================================================================*/ 36 37/* Module parameters */ 38 39MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>"); 40MODULE_DESCRIPTION("PCMCIA Driver Services"); 41MODULE_LICENSE("GPL"); 42 43 44/*====================================================================*/ 45 46static void pcmcia_check_driver(struct pcmcia_driver *p_drv) 47{ 48 const struct pcmcia_device_id *did = p_drv->id_table; 49 unsigned int i; 50 u32 hash; 51 52 if (!p_drv->probe || !p_drv->remove) 53 printk(KERN_DEBUG "pcmcia: %s lacks a requisite callback " 54 "function\n", p_drv->name); 55 56 while (did && did->match_flags) { 57 for (i = 0; i < 4; i++) { 58 if (!did->prod_id[i]) 59 continue; 60 61 hash = crc32(0, did->prod_id[i], strlen(did->prod_id[i])); 62 if (hash == did->prod_id_hash[i]) 63 continue; 64 65 printk(KERN_DEBUG "pcmcia: %s: invalid hash for " 66 "product string \"%s\": is 0x%x, should " 67 "be 0x%x\n", p_drv->name, did->prod_id[i], 68 did->prod_id_hash[i], hash); 69 printk(KERN_DEBUG "pcmcia: see " 70 "Documentation/pcmcia/devicetable.txt for " 71 "details\n"); 72 } 73 did++; 74 } 75 76 return; 77} 78 79 80/*======================================================================*/ 81 82 83struct pcmcia_dynid { 84 struct list_head node; 85 struct pcmcia_device_id id; 86}; 87 88/** 89 * pcmcia_store_new_id - add a new PCMCIA device ID to this driver and re-probe devices 90 * @driver: target device driver 91 * @buf: buffer for scanning device ID data 92 * @count: input size 93 * 94 * Adds a new dynamic PCMCIA device ID to this driver, 95 * and causes the driver to probe for all devices again. 96 */ 97static ssize_t 98pcmcia_store_new_id(struct device_driver *driver, const char *buf, size_t count) 99{ 100 struct pcmcia_dynid *dynid; 101 struct pcmcia_driver *pdrv = to_pcmcia_drv(driver); 102 __u16 match_flags, manf_id, card_id; 103 __u8 func_id, function, device_no; 104 __u32 prod_id_hash[4] = {0, 0, 0, 0}; 105 int fields = 0; 106 int retval = 0; 107 108 fields = sscanf(buf, "%hx %hx %hx %hhx %hhx %hhx %x %x %x %x", 109 &match_flags, &manf_id, &card_id, &func_id, &function, &device_no, 110 &prod_id_hash[0], &prod_id_hash[1], &prod_id_hash[2], &prod_id_hash[3]); 111 if (fields < 6) 112 return -EINVAL; 113 114 dynid = kzalloc(sizeof(struct pcmcia_dynid), GFP_KERNEL); 115 if (!dynid) 116 return -ENOMEM; 117 118 dynid->id.match_flags = match_flags; 119 dynid->id.manf_id = manf_id; 120 dynid->id.card_id = card_id; 121 dynid->id.func_id = func_id; 122 dynid->id.function = function; 123 dynid->id.device_no = device_no; 124 memcpy(dynid->id.prod_id_hash, prod_id_hash, sizeof(__u32) * 4); 125 126 mutex_lock(&pdrv->dynids.lock); 127 list_add_tail(&dynid->node, &pdrv->dynids.list); 128 mutex_unlock(&pdrv->dynids.lock); 129 130 if (get_driver(&pdrv->drv)) { 131 retval = driver_attach(&pdrv->drv); 132 put_driver(&pdrv->drv); 133 } 134 135 if (retval) 136 return retval; 137 return count; 138} 139static DRIVER_ATTR(new_id, S_IWUSR, NULL, pcmcia_store_new_id); 140 141static void 142pcmcia_free_dynids(struct pcmcia_driver *drv) 143{ 144 struct pcmcia_dynid *dynid, *n; 145 146 mutex_lock(&drv->dynids.lock); 147 list_for_each_entry_safe(dynid, n, &drv->dynids.list, node) { 148 list_del(&dynid->node); 149 kfree(dynid); 150 } 151 mutex_unlock(&drv->dynids.lock); 152} 153 154static int 155pcmcia_create_newid_file(struct pcmcia_driver *drv) 156{ 157 int error = 0; 158 if (drv->probe != NULL) 159 error = driver_create_file(&drv->drv, &driver_attr_new_id); 160 return error; 161} 162 163 164/** 165 * pcmcia_register_driver - register a PCMCIA driver with the bus core 166 * @driver: the &driver being registered 167 * 168 * Registers a PCMCIA driver with the PCMCIA bus core. 169 */ 170int pcmcia_register_driver(struct pcmcia_driver *driver) 171{ 172 int error; 173 174 if (!driver) 175 return -EINVAL; 176 177 pcmcia_check_driver(driver); 178 179 /* initialize common fields */ 180 driver->drv.bus = &pcmcia_bus_type; 181 driver->drv.owner = driver->owner; 182 driver->drv.name = driver->name; 183 mutex_init(&driver->dynids.lock); 184 INIT_LIST_HEAD(&driver->dynids.list); 185 186 pr_debug("registering driver %s\n", driver->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->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->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->config_base = cis_config.base; 280 p_dev->config_regs = cis_config.rmask[0]; 281 dev_dbg(dev, "base %x, regs %x", p_dev->config_base, 282 p_dev->config_regs); 283 } else { 284 dev_printk(KERN_INFO, dev, 285 "pcmcia: could not parse base and rmask0 of CIS\n"); 286 p_dev->config_base = 0; 287 p_dev->config_regs = 0; 288 } 289 290 ret = p_drv->probe(p_dev); 291 if (ret) { 292 dev_dbg(dev, "binding to %s failed with %d\n", 293 p_drv->name, ret); 294 goto put_module; 295 } 296 dev_dbg(dev, "%s bound: Vpp %d.%d, idx %x, IRQ %d", p_drv->name, 297 p_dev->vpp/10, p_dev->vpp%10, p_dev->config_index, p_dev->irq); 298 dev_dbg(dev, "resources: ioport %pR %pR iomem %pR %pR %pR", 299 p_dev->resource[0], p_dev->resource[1], p_dev->resource[2], 300 p_dev->resource[3], p_dev->resource[4]); 301 302 mutex_lock(&s->ops_mutex); 303 if ((s->pcmcia_pfc) && 304 (p_dev->socket->device_count == 1) && (p_dev->device_no == 0)) 305 pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY); 306 mutex_unlock(&s->ops_mutex); 307 308put_module: 309 if (ret) 310 module_put(p_drv->owner); 311put_dev: 312 if (ret) 313 put_device(dev); 314 return ret; 315} 316 317 318/* 319 * Removes a PCMCIA card from the device tree and socket list. 320 */ 321static void pcmcia_card_remove(struct pcmcia_socket *s, struct pcmcia_device *leftover) 322{ 323 struct pcmcia_device *p_dev; 324 struct pcmcia_device *tmp; 325 326 dev_dbg(leftover ? &leftover->dev : &s->dev, 327 "pcmcia_card_remove(%d) %s\n", s->sock, 328 leftover ? leftover->devname : ""); 329 330 mutex_lock(&s->ops_mutex); 331 if (!leftover) 332 s->device_count = 0; 333 else 334 s->device_count = 1; 335 mutex_unlock(&s->ops_mutex); 336 337 /* unregister all pcmcia_devices registered with this socket, except leftover */ 338 list_for_each_entry_safe(p_dev, tmp, &s->devices_list, socket_device_list) { 339 if (p_dev == leftover) 340 continue; 341 342 mutex_lock(&s->ops_mutex); 343 list_del(&p_dev->socket_device_list); 344 mutex_unlock(&s->ops_mutex); 345 346 dev_dbg(&p_dev->dev, "unregistering device\n"); 347 device_unregister(&p_dev->dev); 348 } 349 350 return; 351} 352 353static int pcmcia_device_remove(struct device *dev) 354{ 355 struct pcmcia_device *p_dev; 356 struct pcmcia_driver *p_drv; 357 int i; 358 359 p_dev = to_pcmcia_dev(dev); 360 p_drv = to_pcmcia_drv(dev->driver); 361 362 dev_dbg(dev, "removing device\n"); 363 364 /* If we're removing the primary module driving a 365 * pseudo multi-function card, we need to unbind 366 * all devices 367 */ 368 if ((p_dev->socket->pcmcia_pfc) && 369 (p_dev->socket->device_count > 0) && 370 (p_dev->device_no == 0)) 371 pcmcia_card_remove(p_dev->socket, p_dev); 372 373 /* detach the "instance" */ 374 if (!p_drv) 375 return 0; 376 377 if (p_drv->remove) 378 p_drv->remove(p_dev); 379 380 /* check for proper unloading */ 381 if (p_dev->_irq || p_dev->_io || p_dev->_locked) 382 dev_printk(KERN_INFO, dev, 383 "pcmcia: driver %s did not release config properly\n", 384 p_drv->name); 385 386 for (i = 0; i < MAX_WIN; i++) 387 if (p_dev->_win & CLIENT_WIN_REQ(i)) 388 dev_printk(KERN_INFO, dev, 389 "pcmcia: driver %s did not release window properly\n", 390 p_drv->name); 391 392 /* references from pcmcia_probe_device */ 393 pcmcia_put_dev(p_dev); 394 module_put(p_drv->owner); 395 396 return 0; 397} 398 399 400/* 401 * pcmcia_device_query -- determine information about a pcmcia device 402 */ 403static int pcmcia_device_query(struct pcmcia_device *p_dev) 404{ 405 cistpl_manfid_t manf_id; 406 cistpl_funcid_t func_id; 407 cistpl_vers_1_t *vers1; 408 unsigned int i; 409 410 vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL); 411 if (!vers1) 412 return -ENOMEM; 413 414 if (!pccard_read_tuple(p_dev->socket, BIND_FN_ALL, 415 CISTPL_MANFID, &manf_id)) { 416 mutex_lock(&p_dev->socket->ops_mutex); 417 p_dev->manf_id = manf_id.manf; 418 p_dev->card_id = manf_id.card; 419 p_dev->has_manf_id = 1; 420 p_dev->has_card_id = 1; 421 mutex_unlock(&p_dev->socket->ops_mutex); 422 } 423 424 if (!pccard_read_tuple(p_dev->socket, p_dev->func, 425 CISTPL_FUNCID, &func_id)) { 426 mutex_lock(&p_dev->socket->ops_mutex); 427 p_dev->func_id = func_id.func; 428 p_dev->has_func_id = 1; 429 mutex_unlock(&p_dev->socket->ops_mutex); 430 } else { 431 /* rule of thumb: cards with no FUNCID, but with 432 * common memory device geometry information, are 433 * probably memory cards (from pcmcia-cs) */ 434 cistpl_device_geo_t *devgeo; 435 436 devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL); 437 if (!devgeo) { 438 kfree(vers1); 439 return -ENOMEM; 440 } 441 if (!pccard_read_tuple(p_dev->socket, p_dev->func, 442 CISTPL_DEVICE_GEO, devgeo)) { 443 dev_dbg(&p_dev->dev, 444 "mem device geometry probably means " 445 "FUNCID_MEMORY\n"); 446 mutex_lock(&p_dev->socket->ops_mutex); 447 p_dev->func_id = CISTPL_FUNCID_MEMORY; 448 p_dev->has_func_id = 1; 449 mutex_unlock(&p_dev->socket->ops_mutex); 450 } 451 kfree(devgeo); 452 } 453 454 if (!pccard_read_tuple(p_dev->socket, BIND_FN_ALL, CISTPL_VERS_1, 455 vers1)) { 456 mutex_lock(&p_dev->socket->ops_mutex); 457 for (i = 0; i < min_t(unsigned int, 4, vers1->ns); i++) { 458 char *tmp; 459 unsigned int length; 460 char *new; 461 462 tmp = vers1->str + vers1->ofs[i]; 463 464 length = strlen(tmp) + 1; 465 if ((length < 2) || (length > 255)) 466 continue; 467 468 new = kmalloc(sizeof(char) * length, GFP_KERNEL); 469 if (!new) 470 continue; 471 472 new = strncpy(new, tmp, length); 473 474 tmp = p_dev->prod_id[i]; 475 p_dev->prod_id[i] = new; 476 kfree(tmp); 477 } 478 mutex_unlock(&p_dev->socket->ops_mutex); 479 } 480 481 kfree(vers1); 482 return 0; 483} 484 485 486static struct pcmcia_device *pcmcia_device_add(struct pcmcia_socket *s, 487 unsigned int function) 488{ 489 struct pcmcia_device *p_dev, *tmp_dev; 490 int i; 491 492 s = pcmcia_get_socket(s); 493 if (!s) 494 return NULL; 495 496 pr_debug("adding device to %d, function %d\n", s->sock, function); 497 498 p_dev = kzalloc(sizeof(struct pcmcia_device), GFP_KERNEL); 499 if (!p_dev) 500 goto err_put; 501 502 mutex_lock(&s->ops_mutex); 503 p_dev->device_no = (s->device_count++); 504 mutex_unlock(&s->ops_mutex); 505 506 /* max of 2 PFC devices */ 507 if ((p_dev->device_no >= 2) && (function == 0)) 508 goto err_free; 509 510 /* max of 4 devices overall */ 511 if (p_dev->device_no >= 4) 512 goto err_free; 513 514 p_dev->socket = s; 515 p_dev->func = function; 516 517 p_dev->dev.bus = &pcmcia_bus_type; 518 p_dev->dev.parent = s->dev.parent; 519 p_dev->dev.release = pcmcia_release_dev; 520 /* by default don't allow DMA */ 521 p_dev->dma_mask = DMA_MASK_NONE; 522 p_dev->dev.dma_mask = &p_dev->dma_mask; 523 dev_set_name(&p_dev->dev, "%d.%d", p_dev->socket->sock, p_dev->device_no); 524 if (!dev_name(&p_dev->dev)) 525 goto err_free; 526 p_dev->devname = kasprintf(GFP_KERNEL, "pcmcia%s", dev_name(&p_dev->dev)); 527 if (!p_dev->devname) 528 goto err_free; 529 dev_dbg(&p_dev->dev, "devname is %s\n", p_dev->devname); 530 531 mutex_lock(&s->ops_mutex); 532 533 /* 534 * p_dev->function_config must be the same for all card functions. 535 * Note that this is serialized by ops_mutex, so that only one 536 * such struct will be created. 537 */ 538 list_for_each_entry(tmp_dev, &s->devices_list, socket_device_list) 539 if (p_dev->func == tmp_dev->func) { 540 p_dev->function_config = tmp_dev->function_config; 541 p_dev->irq = tmp_dev->irq; 542 kref_get(&p_dev->function_config->ref); 543 } 544 545 /* Add to the list in pcmcia_bus_socket */ 546 list_add(&p_dev->socket_device_list, &s->devices_list); 547 548 if (pcmcia_setup_irq(p_dev)) 549 dev_warn(&p_dev->dev, 550 "IRQ setup failed -- device might not work\n"); 551 552 if (!p_dev->function_config) { 553 config_t *c; 554 dev_dbg(&p_dev->dev, "creating config_t\n"); 555 c = kzalloc(sizeof(struct config_t), GFP_KERNEL); 556 if (!c) { 557 mutex_unlock(&s->ops_mutex); 558 goto err_unreg; 559 } 560 p_dev->function_config = c; 561 kref_init(&c->ref); 562 for (i = 0; i < MAX_IO_WIN; i++) { 563 c->io[i].name = p_dev->devname; 564 c->io[i].flags = IORESOURCE_IO; 565 } 566 for (i = 0; i< MAX_WIN; i++) { 567 c->mem[i].name = p_dev->devname; 568 c->mem[i].flags = IORESOURCE_MEM; 569 } 570 } 571 for (i = 0; i < MAX_IO_WIN; i++) 572 p_dev->resource[i] = &p_dev->function_config->io[i]; 573 for (; i < (MAX_IO_WIN + MAX_WIN); i++) 574 p_dev->resource[i] = &p_dev->function_config->mem[i-MAX_IO_WIN]; 575 576 mutex_unlock(&s->ops_mutex); 577 578 dev_printk(KERN_NOTICE, &p_dev->dev, 579 "pcmcia: registering new device %s (IRQ: %d)\n", 580 p_dev->devname, p_dev->irq); 581 582 pcmcia_device_query(p_dev); 583 584 if (device_register(&p_dev->dev)) 585 goto err_unreg; 586 587 return p_dev; 588 589 err_unreg: 590 mutex_lock(&s->ops_mutex); 591 list_del(&p_dev->socket_device_list); 592 mutex_unlock(&s->ops_mutex); 593 594 err_free: 595 mutex_lock(&s->ops_mutex); 596 s->device_count--; 597 mutex_unlock(&s->ops_mutex); 598 599 for (i = 0; i < 4; i++) 600 kfree(p_dev->prod_id[i]); 601 kfree(p_dev->devname); 602 kfree(p_dev); 603 err_put: 604 pcmcia_put_socket(s); 605 606 return NULL; 607} 608 609 610static int pcmcia_card_add(struct pcmcia_socket *s) 611{ 612 cistpl_longlink_mfc_t mfc; 613 unsigned int no_funcs, i, no_chains; 614 int ret = -EAGAIN; 615 616 mutex_lock(&s->ops_mutex); 617 if (!(s->resource_setup_done)) { 618 dev_dbg(&s->dev, 619 "no resources available, delaying card_add\n"); 620 mutex_unlock(&s->ops_mutex); 621 return -EAGAIN; /* try again, but later... */ 622 } 623 624 if (pcmcia_validate_mem(s)) { 625 dev_dbg(&s->dev, "validating mem resources failed, " 626 "delaying card_add\n"); 627 mutex_unlock(&s->ops_mutex); 628 return -EAGAIN; /* try again, but later... */ 629 } 630 mutex_unlock(&s->ops_mutex); 631 632 ret = pccard_validate_cis(s, &no_chains); 633 if (ret || !no_chains) { 634 dev_dbg(&s->dev, "invalid CIS or invalid resources\n"); 635 return -ENODEV; 636 } 637 638 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc)) 639 no_funcs = mfc.nfn; 640 else 641 no_funcs = 1; 642 s->functions = no_funcs; 643 644 for (i = 0; i < no_funcs; i++) 645 pcmcia_device_add(s, i); 646 647 return ret; 648} 649 650 651static int pcmcia_requery_callback(struct device *dev, void * _data) 652{ 653 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 654 if (!p_dev->dev.driver) { 655 dev_dbg(dev, "update device information\n"); 656 pcmcia_device_query(p_dev); 657 } 658 659 return 0; 660} 661 662 663static void pcmcia_requery(struct pcmcia_socket *s) 664{ 665 int has_pfc; 666 667 if (s->functions == 0) { 668 pcmcia_card_add(s); 669 return; 670 } 671 672 /* some device information might have changed because of a CIS 673 * update or because we can finally read it correctly... so 674 * determine it again, overwriting old values if necessary. */ 675 bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery_callback); 676 677 /* if the CIS changed, we need to check whether the number of 678 * functions changed. */ 679 if (s->fake_cis) { 680 int old_funcs, new_funcs; 681 cistpl_longlink_mfc_t mfc; 682 683 /* does this cis override add or remove functions? */ 684 old_funcs = s->functions; 685 686 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, 687 &mfc)) 688 new_funcs = mfc.nfn; 689 else 690 new_funcs = 1; 691 if (old_funcs != new_funcs) { 692 /* we need to re-start */ 693 pcmcia_card_remove(s, NULL); 694 s->functions = 0; 695 pcmcia_card_add(s); 696 } 697 } 698 699 /* If the PCMCIA device consists of two pseudo devices, 700 * call pcmcia_device_add() -- which will fail if both 701 * devices are already registered. */ 702 mutex_lock(&s->ops_mutex); 703 has_pfc = s->pcmcia_pfc; 704 mutex_unlock(&s->ops_mutex); 705 if (has_pfc) 706 pcmcia_device_add(s, 0); 707 708 /* we re-scan all devices, not just the ones connected to this 709 * socket. This does not matter, though. */ 710 if (bus_rescan_devices(&pcmcia_bus_type)) 711 dev_warn(&s->dev, "rescanning the bus failed\n"); 712} 713 714 715#ifdef CONFIG_PCMCIA_LOAD_CIS 716 717/** 718 * pcmcia_load_firmware - load CIS from userspace if device-provided is broken 719 * @dev: the pcmcia device which needs a CIS override 720 * @filename: requested filename in /lib/firmware/ 721 * 722 * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if 723 * the one provided by the card is broken. The firmware files reside in 724 * /lib/firmware/ in userspace. 725 */ 726static int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename) 727{ 728 struct pcmcia_socket *s = dev->socket; 729 const struct firmware *fw; 730 int ret = -ENOMEM; 731 cistpl_longlink_mfc_t mfc; 732 int old_funcs, new_funcs = 1; 733 734 if (!filename) 735 return -EINVAL; 736 737 dev_dbg(&dev->dev, "trying to load CIS file %s\n", filename); 738 739 if (request_firmware(&fw, filename, &dev->dev) == 0) { 740 if (fw->size >= CISTPL_MAX_CIS_SIZE) { 741 ret = -EINVAL; 742 dev_printk(KERN_ERR, &dev->dev, 743 "pcmcia: CIS override is too big\n"); 744 goto release; 745 } 746 747 if (!pcmcia_replace_cis(s, fw->data, fw->size)) 748 ret = 0; 749 else { 750 dev_printk(KERN_ERR, &dev->dev, 751 "pcmcia: CIS override failed\n"); 752 goto release; 753 } 754 755 /* we need to re-start if the number of functions changed */ 756 old_funcs = s->functions; 757 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, 758 &mfc)) 759 new_funcs = mfc.nfn; 760 761 if (old_funcs != new_funcs) 762 ret = -EBUSY; 763 764 /* update information */ 765 pcmcia_device_query(dev); 766 767 /* requery (as number of functions might have changed) */ 768 pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY); 769 } 770 release: 771 release_firmware(fw); 772 773 return ret; 774} 775 776#else /* !CONFIG_PCMCIA_LOAD_CIS */ 777 778static inline int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename) 779{ 780 return -ENODEV; 781} 782 783#endif 784 785 786static inline int pcmcia_devmatch(struct pcmcia_device *dev, 787 const struct pcmcia_device_id *did) 788{ 789 if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) { 790 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id)) 791 return 0; 792 } 793 794 if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) { 795 if ((!dev->has_card_id) || (dev->card_id != did->card_id)) 796 return 0; 797 } 798 799 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) { 800 if (dev->func != did->function) 801 return 0; 802 } 803 804 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) { 805 if (!dev->prod_id[0]) 806 return 0; 807 if (strcmp(did->prod_id[0], dev->prod_id[0])) 808 return 0; 809 } 810 811 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) { 812 if (!dev->prod_id[1]) 813 return 0; 814 if (strcmp(did->prod_id[1], dev->prod_id[1])) 815 return 0; 816 } 817 818 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) { 819 if (!dev->prod_id[2]) 820 return 0; 821 if (strcmp(did->prod_id[2], dev->prod_id[2])) 822 return 0; 823 } 824 825 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) { 826 if (!dev->prod_id[3]) 827 return 0; 828 if (strcmp(did->prod_id[3], dev->prod_id[3])) 829 return 0; 830 } 831 832 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) { 833 dev_dbg(&dev->dev, "this is a pseudo-multi-function device\n"); 834 mutex_lock(&dev->socket->ops_mutex); 835 dev->socket->pcmcia_pfc = 1; 836 mutex_unlock(&dev->socket->ops_mutex); 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 (dev->socket->pcmcia_pfc) 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 if (pcmcia_load_firmware(dev, did->cisfile)) 873 return 0; 874 } 875 876 if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) { 877 int i; 878 for (i = 0; i < 4; i++) 879 if (dev->prod_id[i]) 880 return 0; 881 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id) 882 return 0; 883 } 884 885 return 1; 886} 887 888 889static int pcmcia_bus_match(struct device *dev, struct device_driver *drv) 890{ 891 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 892 struct pcmcia_driver *p_drv = to_pcmcia_drv(drv); 893 const struct pcmcia_device_id *did = p_drv->id_table; 894 struct pcmcia_dynid *dynid; 895 896 /* match dynamic devices first */ 897 mutex_lock(&p_drv->dynids.lock); 898 list_for_each_entry(dynid, &p_drv->dynids.list, node) { 899 dev_dbg(dev, "trying to match to %s\n", drv->name); 900 if (pcmcia_devmatch(p_dev, &dynid->id)) { 901 dev_dbg(dev, "matched to %s\n", drv->name); 902 mutex_unlock(&p_drv->dynids.lock); 903 return 1; 904 } 905 } 906 mutex_unlock(&p_drv->dynids.lock); 907 908 while (did && did->match_flags) { 909 dev_dbg(dev, "trying to match to %s\n", drv->name); 910 if (pcmcia_devmatch(p_dev, did)) { 911 dev_dbg(dev, "matched to %s\n", drv->name); 912 return 1; 913 } 914 did++; 915 } 916 917 return 0; 918} 919 920#ifdef CONFIG_HOTPLUG 921 922static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env) 923{ 924 struct pcmcia_device *p_dev; 925 int i; 926 u32 hash[4] = { 0, 0, 0, 0}; 927 928 if (!dev) 929 return -ENODEV; 930 931 p_dev = to_pcmcia_dev(dev); 932 933 /* calculate hashes */ 934 for (i = 0; i < 4; i++) { 935 if (!p_dev->prod_id[i]) 936 continue; 937 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i])); 938 } 939 940 if (add_uevent_var(env, "SOCKET_NO=%u", p_dev->socket->sock)) 941 return -ENOMEM; 942 943 if (add_uevent_var(env, "DEVICE_NO=%02X", p_dev->device_no)) 944 return -ENOMEM; 945 946 if (add_uevent_var(env, "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X" 947 "pa%08Xpb%08Xpc%08Xpd%08X", 948 p_dev->has_manf_id ? p_dev->manf_id : 0, 949 p_dev->has_card_id ? p_dev->card_id : 0, 950 p_dev->has_func_id ? p_dev->func_id : 0, 951 p_dev->func, 952 p_dev->device_no, 953 hash[0], 954 hash[1], 955 hash[2], 956 hash[3])) 957 return -ENOMEM; 958 959 return 0; 960} 961 962#else 963 964static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env) 965{ 966 return -ENODEV; 967} 968 969#endif 970 971/************************ runtime PM support ***************************/ 972 973static int pcmcia_dev_suspend(struct device *dev, pm_message_t state); 974static int pcmcia_dev_resume(struct device *dev); 975 976static int runtime_suspend(struct device *dev) 977{ 978 int rc; 979 980 device_lock(dev); 981 rc = pcmcia_dev_suspend(dev, PMSG_SUSPEND); 982 device_unlock(dev); 983 return rc; 984} 985 986static int runtime_resume(struct device *dev) 987{ 988 int rc; 989 990 device_lock(dev); 991 rc = pcmcia_dev_resume(dev); 992 device_unlock(dev); 993 return rc; 994} 995 996/************************ per-device sysfs output ***************************/ 997 998#define pcmcia_device_attr(field, test, format) \ 999static ssize_t field##_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->test ? sprintf(buf, format, p_dev->field) : -ENODEV; \ 1003} 1004 1005#define pcmcia_device_stringattr(name, field) \ 1006static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf) \ 1007{ \ 1008 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \ 1009 return p_dev->field ? sprintf(buf, "%s\n", p_dev->field) : -ENODEV; \ 1010} 1011 1012pcmcia_device_attr(func, socket, "0x%02x\n"); 1013pcmcia_device_attr(func_id, has_func_id, "0x%02x\n"); 1014pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n"); 1015pcmcia_device_attr(card_id, has_card_id, "0x%04x\n"); 1016pcmcia_device_stringattr(prod_id1, prod_id[0]); 1017pcmcia_device_stringattr(prod_id2, prod_id[1]); 1018pcmcia_device_stringattr(prod_id3, prod_id[2]); 1019pcmcia_device_stringattr(prod_id4, prod_id[3]); 1020 1021static ssize_t pcmcia_show_resources(struct device *dev, 1022 struct device_attribute *attr, char *buf) 1023{ 1024 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1025 char *str = buf; 1026 int i; 1027 1028 for (i = 0; i < PCMCIA_NUM_RESOURCES; i++) 1029 str += sprintf(str, "%pr\n", p_dev->resource[i]); 1030 1031 return str - buf; 1032} 1033 1034static 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 1044static 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 1062static 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 1084static 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 1089 if (!count) 1090 return -EINVAL; 1091 1092 mutex_lock(&p_dev->socket->ops_mutex); 1093 p_dev->allow_func_id_match = 1; 1094 mutex_unlock(&p_dev->socket->ops_mutex); 1095 pcmcia_parse_uevents(p_dev->socket, PCMCIA_UEVENT_REQUERY); 1096 1097 return count; 1098} 1099 1100static struct device_attribute pcmcia_dev_attrs[] = { 1101 __ATTR(function, 0444, func_show, NULL), 1102 __ATTR(pm_state, 0644, pcmcia_show_pm_state, pcmcia_store_pm_state), 1103 __ATTR(resources, 0444, pcmcia_show_resources, NULL), 1104 __ATTR_RO(func_id), 1105 __ATTR_RO(manf_id), 1106 __ATTR_RO(card_id), 1107 __ATTR_RO(prod_id1), 1108 __ATTR_RO(prod_id2), 1109 __ATTR_RO(prod_id3), 1110 __ATTR_RO(prod_id4), 1111 __ATTR_RO(modalias), 1112 __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match), 1113 __ATTR_NULL, 1114}; 1115 1116/* PM support, also needed for reset */ 1117 1118static int pcmcia_dev_suspend(struct device *dev, pm_message_t state) 1119{ 1120 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1121 struct pcmcia_driver *p_drv = NULL; 1122 int ret = 0; 1123 1124 mutex_lock(&p_dev->socket->ops_mutex); 1125 if (p_dev->suspended) { 1126 mutex_unlock(&p_dev->socket->ops_mutex); 1127 return 0; 1128 } 1129 p_dev->suspended = 1; 1130 mutex_unlock(&p_dev->socket->ops_mutex); 1131 1132 dev_dbg(dev, "suspending\n"); 1133 1134 if (dev->driver) 1135 p_drv = to_pcmcia_drv(dev->driver); 1136 1137 if (!p_drv) 1138 goto out; 1139 1140 if (p_drv->suspend) { 1141 ret = p_drv->suspend(p_dev); 1142 if (ret) { 1143 dev_printk(KERN_ERR, dev, 1144 "pcmcia: device %s (driver %s) did " 1145 "not want to go to sleep (%d)\n", 1146 p_dev->devname, p_drv->name, ret); 1147 mutex_lock(&p_dev->socket->ops_mutex); 1148 p_dev->suspended = 0; 1149 mutex_unlock(&p_dev->socket->ops_mutex); 1150 goto out; 1151 } 1152 } 1153 1154 if (p_dev->device_no == p_dev->func) { 1155 dev_dbg(dev, "releasing configuration\n"); 1156 pcmcia_release_configuration(p_dev); 1157 } 1158 1159 out: 1160 return ret; 1161} 1162 1163 1164static int pcmcia_dev_resume(struct device *dev) 1165{ 1166 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1167 struct pcmcia_driver *p_drv = NULL; 1168 int ret = 0; 1169 1170 mutex_lock(&p_dev->socket->ops_mutex); 1171 if (!p_dev->suspended) { 1172 mutex_unlock(&p_dev->socket->ops_mutex); 1173 return 0; 1174 } 1175 p_dev->suspended = 0; 1176 mutex_unlock(&p_dev->socket->ops_mutex); 1177 1178 dev_dbg(dev, "resuming\n"); 1179 1180 if (dev->driver) 1181 p_drv = to_pcmcia_drv(dev->driver); 1182 1183 if (!p_drv) 1184 goto out; 1185 1186 if (p_dev->device_no == p_dev->func) { 1187 dev_dbg(dev, "requesting configuration\n"); 1188 ret = pcmcia_enable_device(p_dev); 1189 if (ret) 1190 goto out; 1191 } 1192 1193 if (p_drv->resume) 1194 ret = p_drv->resume(p_dev); 1195 1196 out: 1197 return ret; 1198} 1199 1200 1201static int pcmcia_bus_suspend_callback(struct device *dev, void * _data) 1202{ 1203 struct pcmcia_socket *skt = _data; 1204 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1205 1206 if (p_dev->socket != skt || p_dev->suspended) 1207 return 0; 1208 1209 return runtime_suspend(dev); 1210} 1211 1212static int pcmcia_bus_resume_callback(struct device *dev, void * _data) 1213{ 1214 struct pcmcia_socket *skt = _data; 1215 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1216 1217 if (p_dev->socket != skt || !p_dev->suspended) 1218 return 0; 1219 1220 runtime_resume(dev); 1221 1222 return 0; 1223} 1224 1225static int pcmcia_bus_resume(struct pcmcia_socket *skt) 1226{ 1227 dev_dbg(&skt->dev, "resuming socket %d\n", skt->sock); 1228 bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback); 1229 return 0; 1230} 1231 1232static int pcmcia_bus_suspend(struct pcmcia_socket *skt) 1233{ 1234 dev_dbg(&skt->dev, "suspending socket %d\n", skt->sock); 1235 if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt, 1236 pcmcia_bus_suspend_callback)) { 1237 pcmcia_bus_resume(skt); 1238 return -EIO; 1239 } 1240 return 0; 1241} 1242 1243static int pcmcia_bus_remove(struct pcmcia_socket *skt) 1244{ 1245 atomic_set(&skt->present, 0); 1246 pcmcia_card_remove(skt, NULL); 1247 1248 mutex_lock(&skt->ops_mutex); 1249 destroy_cis_cache(skt); 1250 pcmcia_cleanup_irq(skt); 1251 mutex_unlock(&skt->ops_mutex); 1252 1253 return 0; 1254} 1255 1256static int pcmcia_bus_add(struct pcmcia_socket *skt) 1257{ 1258 atomic_set(&skt->present, 1); 1259 1260 mutex_lock(&skt->ops_mutex); 1261 skt->pcmcia_pfc = 0; 1262 destroy_cis_cache(skt); /* to be on the safe side... */ 1263 mutex_unlock(&skt->ops_mutex); 1264 1265 pcmcia_card_add(skt); 1266 1267 return 0; 1268} 1269 1270static int pcmcia_bus_early_resume(struct pcmcia_socket *skt) 1271{ 1272 if (!verify_cis_cache(skt)) 1273 return 0; 1274 1275 dev_dbg(&skt->dev, "cis mismatch - different card\n"); 1276 1277 /* first, remove the card */ 1278 pcmcia_bus_remove(skt); 1279 1280 mutex_lock(&skt->ops_mutex); 1281 destroy_cis_cache(skt); 1282 kfree(skt->fake_cis); 1283 skt->fake_cis = NULL; 1284 skt->functions = 0; 1285 mutex_unlock(&skt->ops_mutex); 1286 1287 /* now, add the new card */ 1288 pcmcia_bus_add(skt); 1289 return 0; 1290} 1291 1292 1293/* 1294 * NOTE: This is racy. There's no guarantee the card will still be 1295 * physically present, even if the call to this function returns 1296 * non-NULL. Furthermore, the device driver most likely is unbound 1297 * almost immediately, so the timeframe where pcmcia_dev_present 1298 * returns NULL is probably really really small. 1299 */ 1300struct pcmcia_device *pcmcia_dev_present(struct pcmcia_device *_p_dev) 1301{ 1302 struct pcmcia_device *p_dev; 1303 struct pcmcia_device *ret = NULL; 1304 1305 p_dev = pcmcia_get_dev(_p_dev); 1306 if (!p_dev) 1307 return NULL; 1308 1309 if (atomic_read(&p_dev->socket->present) != 0) 1310 ret = p_dev; 1311 1312 pcmcia_put_dev(p_dev); 1313 return ret; 1314} 1315EXPORT_SYMBOL(pcmcia_dev_present); 1316 1317 1318static struct pcmcia_callback pcmcia_bus_callback = { 1319 .owner = THIS_MODULE, 1320 .add = pcmcia_bus_add, 1321 .remove = pcmcia_bus_remove, 1322 .requery = pcmcia_requery, 1323 .validate = pccard_validate_cis, 1324 .suspend = pcmcia_bus_suspend, 1325 .early_resume = pcmcia_bus_early_resume, 1326 .resume = pcmcia_bus_resume, 1327}; 1328 1329static int __devinit pcmcia_bus_add_socket(struct device *dev, 1330 struct class_interface *class_intf) 1331{ 1332 struct pcmcia_socket *socket = dev_get_drvdata(dev); 1333 int ret; 1334 1335 socket = pcmcia_get_socket(socket); 1336 if (!socket) { 1337 dev_printk(KERN_ERR, dev, 1338 "PCMCIA obtaining reference to socket failed\n"); 1339 return -ENODEV; 1340 } 1341 1342 ret = sysfs_create_bin_file(&dev->kobj, &pccard_cis_attr); 1343 if (ret) { 1344 dev_printk(KERN_ERR, dev, "PCMCIA registration failed\n"); 1345 pcmcia_put_socket(socket); 1346 return ret; 1347 } 1348 1349 INIT_LIST_HEAD(&socket->devices_list); 1350 socket->pcmcia_pfc = 0; 1351 socket->device_count = 0; 1352 atomic_set(&socket->present, 0); 1353 1354 ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback); 1355 if (ret) { 1356 dev_printk(KERN_ERR, dev, "PCMCIA registration failed\n"); 1357 pcmcia_put_socket(socket); 1358 return ret; 1359 } 1360 1361 return 0; 1362} 1363 1364static void pcmcia_bus_remove_socket(struct device *dev, 1365 struct class_interface *class_intf) 1366{ 1367 struct pcmcia_socket *socket = dev_get_drvdata(dev); 1368 1369 if (!socket) 1370 return; 1371 1372 pccard_register_pcmcia(socket, NULL); 1373 1374 /* unregister any unbound devices */ 1375 mutex_lock(&socket->skt_mutex); 1376 pcmcia_card_remove(socket, NULL); 1377 release_cis_mem(socket); 1378 mutex_unlock(&socket->skt_mutex); 1379 1380 sysfs_remove_bin_file(&dev->kobj, &pccard_cis_attr); 1381 1382 pcmcia_put_socket(socket); 1383 1384 return; 1385} 1386 1387 1388/* the pcmcia_bus_interface is used to handle pcmcia socket devices */ 1389static struct class_interface pcmcia_bus_interface __refdata = { 1390 .class = &pcmcia_socket_class, 1391 .add_dev = &pcmcia_bus_add_socket, 1392 .remove_dev = &pcmcia_bus_remove_socket, 1393}; 1394 1395 1396struct bus_type pcmcia_bus_type = { 1397 .name = "pcmcia", 1398 .uevent = pcmcia_bus_uevent, 1399 .match = pcmcia_bus_match, 1400 .dev_attrs = pcmcia_dev_attrs, 1401 .probe = pcmcia_device_probe, 1402 .remove = pcmcia_device_remove, 1403 .suspend = pcmcia_dev_suspend, 1404 .resume = pcmcia_dev_resume, 1405}; 1406 1407 1408static int __init init_pcmcia_bus(void) 1409{ 1410 int ret; 1411 1412 ret = bus_register(&pcmcia_bus_type); 1413 if (ret < 0) { 1414 printk(KERN_WARNING "pcmcia: bus_register error: %d\n", ret); 1415 return ret; 1416 } 1417 ret = class_interface_register(&pcmcia_bus_interface); 1418 if (ret < 0) { 1419 printk(KERN_WARNING 1420 "pcmcia: class_interface_register error: %d\n", ret); 1421 bus_unregister(&pcmcia_bus_type); 1422 return ret; 1423 } 1424 1425 return 0; 1426} 1427fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that 1428 * pcmcia_socket_class is already registered */ 1429 1430 1431static void __exit exit_pcmcia_bus(void) 1432{ 1433 class_interface_unregister(&pcmcia_bus_interface); 1434 1435 bus_unregister(&pcmcia_bus_type); 1436} 1437module_exit(exit_pcmcia_bus); 1438 1439 1440MODULE_ALIAS("ds"); 1441