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 39 MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>"); 40 MODULE_DESCRIPTION("PCMCIA Driver Services"); 41 MODULE_LICENSE("GPL"); 42 43 44 /*====================================================================*/ 45 46 static 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 83 struct 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 */ 97 static ssize_t 98 pcmcia_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 retval = driver_attach(&pdrv->drv); 131 132 if (retval) 133 return retval; 134 return count; 135 } 136 static DRIVER_ATTR(new_id, S_IWUSR, NULL, pcmcia_store_new_id); 137 138 static void 139 pcmcia_free_dynids(struct pcmcia_driver *drv) 140 { 141 struct pcmcia_dynid *dynid, *n; 142 143 mutex_lock(&drv->dynids.lock); 144 list_for_each_entry_safe(dynid, n, &drv->dynids.list, node) { 145 list_del(&dynid->node); 146 kfree(dynid); 147 } 148 mutex_unlock(&drv->dynids.lock); 149 } 150 151 static int 152 pcmcia_create_newid_file(struct pcmcia_driver *drv) 153 { 154 int error = 0; 155 if (drv->probe != NULL) 156 error = driver_create_file(&drv->drv, &driver_attr_new_id); 157 return error; 158 } 159 160 static void 161 pcmcia_remove_newid_file(struct pcmcia_driver *drv) 162 { 163 driver_remove_file(&drv->drv, &driver_attr_new_id); 164 } 165 166 /** 167 * pcmcia_register_driver - register a PCMCIA driver with the bus core 168 * @driver: the &driver being registered 169 * 170 * Registers a PCMCIA driver with the PCMCIA bus core. 171 */ 172 int pcmcia_register_driver(struct pcmcia_driver *driver) 173 { 174 int error; 175 176 if (!driver) 177 return -EINVAL; 178 179 pcmcia_check_driver(driver); 180 181 /* initialize common fields */ 182 driver->drv.bus = &pcmcia_bus_type; 183 driver->drv.owner = driver->owner; 184 driver->drv.name = driver->name; 185 mutex_init(&driver->dynids.lock); 186 INIT_LIST_HEAD(&driver->dynids.list); 187 188 pr_debug("registering driver %s\n", driver->name); 189 190 error = driver_register(&driver->drv); 191 if (error < 0) 192 return error; 193 194 error = pcmcia_create_newid_file(driver); 195 if (error) 196 driver_unregister(&driver->drv); 197 198 return error; 199 } 200 EXPORT_SYMBOL(pcmcia_register_driver); 201 202 /** 203 * pcmcia_unregister_driver - unregister a PCMCIA driver with the bus core 204 * @driver: the &driver being unregistered 205 */ 206 void pcmcia_unregister_driver(struct pcmcia_driver *driver) 207 { 208 pr_debug("unregistering driver %s\n", driver->name); 209 pcmcia_remove_newid_file(driver); 210 driver_unregister(&driver->drv); 211 pcmcia_free_dynids(driver); 212 } 213 EXPORT_SYMBOL(pcmcia_unregister_driver); 214 215 216 /* pcmcia_device handling */ 217 218 static struct pcmcia_device *pcmcia_get_dev(struct pcmcia_device *p_dev) 219 { 220 struct device *tmp_dev; 221 tmp_dev = get_device(&p_dev->dev); 222 if (!tmp_dev) 223 return NULL; 224 return to_pcmcia_dev(tmp_dev); 225 } 226 227 static void pcmcia_put_dev(struct pcmcia_device *p_dev) 228 { 229 if (p_dev) 230 put_device(&p_dev->dev); 231 } 232 233 static void pcmcia_release_function(struct kref *ref) 234 { 235 struct config_t *c = container_of(ref, struct config_t, ref); 236 pr_debug("releasing config_t\n"); 237 kfree(c); 238 } 239 240 static void pcmcia_release_dev(struct device *dev) 241 { 242 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 243 int i; 244 dev_dbg(dev, "releasing device\n"); 245 pcmcia_put_socket(p_dev->socket); 246 for (i = 0; i < 4; i++) 247 kfree(p_dev->prod_id[i]); 248 kfree(p_dev->devname); 249 kref_put(&p_dev->function_config->ref, pcmcia_release_function); 250 kfree(p_dev); 251 } 252 253 254 static int pcmcia_device_probe(struct device *dev) 255 { 256 struct pcmcia_device *p_dev; 257 struct pcmcia_driver *p_drv; 258 struct pcmcia_socket *s; 259 cistpl_config_t cis_config; 260 int ret = 0; 261 262 dev = get_device(dev); 263 if (!dev) 264 return -ENODEV; 265 266 p_dev = to_pcmcia_dev(dev); 267 p_drv = to_pcmcia_drv(dev->driver); 268 s = p_dev->socket; 269 270 dev_dbg(dev, "trying to bind to %s\n", p_drv->name); 271 272 if ((!p_drv->probe) || (!p_dev->function_config) || 273 (!try_module_get(p_drv->owner))) { 274 ret = -EINVAL; 275 goto put_dev; 276 } 277 278 /* set up some more device information */ 279 ret = pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_CONFIG, 280 &cis_config); 281 if (!ret) { 282 p_dev->config_base = cis_config.base; 283 p_dev->config_regs = cis_config.rmask[0]; 284 dev_dbg(dev, "base %x, regs %x", p_dev->config_base, 285 p_dev->config_regs); 286 } else { 287 dev_info(dev, 288 "pcmcia: could not parse base and rmask0 of CIS\n"); 289 p_dev->config_base = 0; 290 p_dev->config_regs = 0; 291 } 292 293 ret = p_drv->probe(p_dev); 294 if (ret) { 295 dev_dbg(dev, "binding to %s failed with %d\n", 296 p_drv->name, ret); 297 goto put_module; 298 } 299 dev_dbg(dev, "%s bound: Vpp %d.%d, idx %x, IRQ %d", p_drv->name, 300 p_dev->vpp/10, p_dev->vpp%10, p_dev->config_index, p_dev->irq); 301 dev_dbg(dev, "resources: ioport %pR %pR iomem %pR %pR %pR", 302 p_dev->resource[0], p_dev->resource[1], p_dev->resource[2], 303 p_dev->resource[3], p_dev->resource[4]); 304 305 mutex_lock(&s->ops_mutex); 306 if ((s->pcmcia_pfc) && 307 (p_dev->socket->device_count == 1) && (p_dev->device_no == 0)) 308 pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY); 309 mutex_unlock(&s->ops_mutex); 310 311 put_module: 312 if (ret) 313 module_put(p_drv->owner); 314 put_dev: 315 if (ret) 316 put_device(dev); 317 return ret; 318 } 319 320 321 /* 322 * Removes a PCMCIA card from the device tree and socket list. 323 */ 324 static void pcmcia_card_remove(struct pcmcia_socket *s, struct pcmcia_device *leftover) 325 { 326 struct pcmcia_device *p_dev; 327 struct pcmcia_device *tmp; 328 329 dev_dbg(leftover ? &leftover->dev : &s->dev, 330 "pcmcia_card_remove(%d) %s\n", s->sock, 331 leftover ? leftover->devname : ""); 332 333 mutex_lock(&s->ops_mutex); 334 if (!leftover) 335 s->device_count = 0; 336 else 337 s->device_count = 1; 338 mutex_unlock(&s->ops_mutex); 339 340 /* unregister all pcmcia_devices registered with this socket, except leftover */ 341 list_for_each_entry_safe(p_dev, tmp, &s->devices_list, socket_device_list) { 342 if (p_dev == leftover) 343 continue; 344 345 mutex_lock(&s->ops_mutex); 346 list_del(&p_dev->socket_device_list); 347 mutex_unlock(&s->ops_mutex); 348 349 dev_dbg(&p_dev->dev, "unregistering device\n"); 350 device_unregister(&p_dev->dev); 351 } 352 353 return; 354 } 355 356 static int pcmcia_device_remove(struct device *dev) 357 { 358 struct pcmcia_device *p_dev; 359 struct pcmcia_driver *p_drv; 360 int i; 361 362 p_dev = to_pcmcia_dev(dev); 363 p_drv = to_pcmcia_drv(dev->driver); 364 365 dev_dbg(dev, "removing device\n"); 366 367 /* If we're removing the primary module driving a 368 * pseudo multi-function card, we need to unbind 369 * all devices 370 */ 371 if ((p_dev->socket->pcmcia_pfc) && 372 (p_dev->socket->device_count > 0) && 373 (p_dev->device_no == 0)) 374 pcmcia_card_remove(p_dev->socket, p_dev); 375 376 /* detach the "instance" */ 377 if (!p_drv) 378 return 0; 379 380 if (p_drv->remove) 381 p_drv->remove(p_dev); 382 383 /* check for proper unloading */ 384 if (p_dev->_irq || p_dev->_io || p_dev->_locked) 385 dev_info(dev, 386 "pcmcia: driver %s did not release config properly\n", 387 p_drv->name); 388 389 for (i = 0; i < MAX_WIN; i++) 390 if (p_dev->_win & CLIENT_WIN_REQ(i)) 391 dev_info(dev, 392 "pcmcia: driver %s did not release window properly\n", 393 p_drv->name); 394 395 /* references from pcmcia_probe_device */ 396 pcmcia_put_dev(p_dev); 397 module_put(p_drv->owner); 398 399 return 0; 400 } 401 402 403 /* 404 * pcmcia_device_query -- determine information about a pcmcia device 405 */ 406 static int pcmcia_device_query(struct pcmcia_device *p_dev) 407 { 408 cistpl_manfid_t manf_id; 409 cistpl_funcid_t func_id; 410 cistpl_vers_1_t *vers1; 411 unsigned int i; 412 413 vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL); 414 if (!vers1) 415 return -ENOMEM; 416 417 if (!pccard_read_tuple(p_dev->socket, BIND_FN_ALL, 418 CISTPL_MANFID, &manf_id)) { 419 mutex_lock(&p_dev->socket->ops_mutex); 420 p_dev->manf_id = manf_id.manf; 421 p_dev->card_id = manf_id.card; 422 p_dev->has_manf_id = 1; 423 p_dev->has_card_id = 1; 424 mutex_unlock(&p_dev->socket->ops_mutex); 425 } 426 427 if (!pccard_read_tuple(p_dev->socket, p_dev->func, 428 CISTPL_FUNCID, &func_id)) { 429 mutex_lock(&p_dev->socket->ops_mutex); 430 p_dev->func_id = func_id.func; 431 p_dev->has_func_id = 1; 432 mutex_unlock(&p_dev->socket->ops_mutex); 433 } else { 434 /* rule of thumb: cards with no FUNCID, but with 435 * common memory device geometry information, are 436 * probably memory cards (from pcmcia-cs) */ 437 cistpl_device_geo_t *devgeo; 438 439 devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL); 440 if (!devgeo) { 441 kfree(vers1); 442 return -ENOMEM; 443 } 444 if (!pccard_read_tuple(p_dev->socket, p_dev->func, 445 CISTPL_DEVICE_GEO, devgeo)) { 446 dev_dbg(&p_dev->dev, 447 "mem device geometry probably means " 448 "FUNCID_MEMORY\n"); 449 mutex_lock(&p_dev->socket->ops_mutex); 450 p_dev->func_id = CISTPL_FUNCID_MEMORY; 451 p_dev->has_func_id = 1; 452 mutex_unlock(&p_dev->socket->ops_mutex); 453 } 454 kfree(devgeo); 455 } 456 457 if (!pccard_read_tuple(p_dev->socket, BIND_FN_ALL, CISTPL_VERS_1, 458 vers1)) { 459 mutex_lock(&p_dev->socket->ops_mutex); 460 for (i = 0; i < min_t(unsigned int, 4, vers1->ns); i++) { 461 char *tmp; 462 unsigned int length; 463 char *new; 464 465 tmp = vers1->str + vers1->ofs[i]; 466 467 length = strlen(tmp) + 1; 468 if ((length < 2) || (length > 255)) 469 continue; 470 471 new = kmalloc(sizeof(char) * length, GFP_KERNEL); 472 if (!new) 473 continue; 474 475 new = strncpy(new, tmp, length); 476 477 tmp = p_dev->prod_id[i]; 478 p_dev->prod_id[i] = new; 479 kfree(tmp); 480 } 481 mutex_unlock(&p_dev->socket->ops_mutex); 482 } 483 484 kfree(vers1); 485 return 0; 486 } 487 488 489 static struct pcmcia_device *pcmcia_device_add(struct pcmcia_socket *s, 490 unsigned int function) 491 { 492 struct pcmcia_device *p_dev, *tmp_dev; 493 int i; 494 495 s = pcmcia_get_socket(s); 496 if (!s) 497 return NULL; 498 499 pr_debug("adding device to %d, function %d\n", s->sock, function); 500 501 p_dev = kzalloc(sizeof(struct pcmcia_device), GFP_KERNEL); 502 if (!p_dev) 503 goto err_put; 504 505 mutex_lock(&s->ops_mutex); 506 p_dev->device_no = (s->device_count++); 507 mutex_unlock(&s->ops_mutex); 508 509 /* max of 2 PFC devices */ 510 if ((p_dev->device_no >= 2) && (function == 0)) 511 goto err_free; 512 513 /* max of 4 devices overall */ 514 if (p_dev->device_no >= 4) 515 goto err_free; 516 517 p_dev->socket = s; 518 p_dev->func = function; 519 520 p_dev->dev.bus = &pcmcia_bus_type; 521 p_dev->dev.parent = s->dev.parent; 522 p_dev->dev.release = pcmcia_release_dev; 523 /* by default don't allow DMA */ 524 p_dev->dma_mask = DMA_MASK_NONE; 525 p_dev->dev.dma_mask = &p_dev->dma_mask; 526 dev_set_name(&p_dev->dev, "%d.%d", p_dev->socket->sock, p_dev->device_no); 527 if (!dev_name(&p_dev->dev)) 528 goto err_free; 529 p_dev->devname = kasprintf(GFP_KERNEL, "pcmcia%s", dev_name(&p_dev->dev)); 530 if (!p_dev->devname) 531 goto err_free; 532 dev_dbg(&p_dev->dev, "devname is %s\n", p_dev->devname); 533 534 mutex_lock(&s->ops_mutex); 535 536 /* 537 * p_dev->function_config must be the same for all card functions. 538 * Note that this is serialized by ops_mutex, so that only one 539 * such struct will be created. 540 */ 541 list_for_each_entry(tmp_dev, &s->devices_list, socket_device_list) 542 if (p_dev->func == tmp_dev->func) { 543 p_dev->function_config = tmp_dev->function_config; 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 if (pcmcia_setup_irq(p_dev)) 552 dev_warn(&p_dev->dev, 553 "IRQ setup failed -- device might not work\n"); 554 555 if (!p_dev->function_config) { 556 config_t *c; 557 dev_dbg(&p_dev->dev, "creating config_t\n"); 558 c = kzalloc(sizeof(struct config_t), GFP_KERNEL); 559 if (!c) { 560 mutex_unlock(&s->ops_mutex); 561 goto err_unreg; 562 } 563 p_dev->function_config = c; 564 kref_init(&c->ref); 565 for (i = 0; i < MAX_IO_WIN; i++) { 566 c->io[i].name = p_dev->devname; 567 c->io[i].flags = IORESOURCE_IO; 568 } 569 for (i = 0; i < MAX_WIN; i++) { 570 c->mem[i].name = p_dev->devname; 571 c->mem[i].flags = IORESOURCE_MEM; 572 } 573 } 574 for (i = 0; i < MAX_IO_WIN; i++) 575 p_dev->resource[i] = &p_dev->function_config->io[i]; 576 for (; i < (MAX_IO_WIN + MAX_WIN); i++) 577 p_dev->resource[i] = &p_dev->function_config->mem[i-MAX_IO_WIN]; 578 579 mutex_unlock(&s->ops_mutex); 580 581 dev_notice(&p_dev->dev, "pcmcia: registering new device %s (IRQ: %d)\n", 582 p_dev->devname, p_dev->irq); 583 584 pcmcia_device_query(p_dev); 585 586 if (device_register(&p_dev->dev)) 587 goto err_unreg; 588 589 return p_dev; 590 591 err_unreg: 592 mutex_lock(&s->ops_mutex); 593 list_del(&p_dev->socket_device_list); 594 mutex_unlock(&s->ops_mutex); 595 596 err_free: 597 mutex_lock(&s->ops_mutex); 598 s->device_count--; 599 mutex_unlock(&s->ops_mutex); 600 601 for (i = 0; i < 4; i++) 602 kfree(p_dev->prod_id[i]); 603 kfree(p_dev->devname); 604 kfree(p_dev); 605 err_put: 606 pcmcia_put_socket(s); 607 608 return NULL; 609 } 610 611 612 static int pcmcia_card_add(struct pcmcia_socket *s) 613 { 614 cistpl_longlink_mfc_t mfc; 615 unsigned int no_funcs, i, no_chains; 616 int ret = -EAGAIN; 617 618 mutex_lock(&s->ops_mutex); 619 if (!(s->resource_setup_done)) { 620 dev_dbg(&s->dev, 621 "no resources available, delaying card_add\n"); 622 mutex_unlock(&s->ops_mutex); 623 return -EAGAIN; /* try again, but later... */ 624 } 625 626 if (pcmcia_validate_mem(s)) { 627 dev_dbg(&s->dev, "validating mem resources failed, " 628 "delaying card_add\n"); 629 mutex_unlock(&s->ops_mutex); 630 return -EAGAIN; /* try again, but later... */ 631 } 632 mutex_unlock(&s->ops_mutex); 633 634 ret = pccard_validate_cis(s, &no_chains); 635 if (ret || !no_chains) { 636 #if defined(CONFIG_MTD_PCMCIA_ANONYMOUS) 637 /* Set up as an anonymous card. If we don't have anonymous 638 memory support then just error the card as there is no 639 point trying to second guess. 640 641 Note: some cards have just a device entry, it may be 642 worth extending support to cover these in future */ 643 if (ret == -EIO) { 644 dev_info(&s->dev, "no CIS, assuming an anonymous memory card.\n"); 645 pcmcia_replace_cis(s, "\xFF", 1); 646 no_chains = 1; 647 ret = 0; 648 } else 649 #endif 650 { 651 dev_dbg(&s->dev, "invalid CIS or invalid resources\n"); 652 return -ENODEV; 653 } 654 } 655 656 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc)) 657 no_funcs = mfc.nfn; 658 else 659 no_funcs = 1; 660 s->functions = no_funcs; 661 662 for (i = 0; i < no_funcs; i++) 663 pcmcia_device_add(s, i); 664 665 return ret; 666 } 667 668 669 static int pcmcia_requery_callback(struct device *dev, void *_data) 670 { 671 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 672 if (!p_dev->dev.driver) { 673 dev_dbg(dev, "update device information\n"); 674 pcmcia_device_query(p_dev); 675 } 676 677 return 0; 678 } 679 680 681 static void pcmcia_requery(struct pcmcia_socket *s) 682 { 683 int has_pfc; 684 685 if (!(s->state & SOCKET_PRESENT)) 686 return; 687 688 if (s->functions == 0) { 689 pcmcia_card_add(s); 690 return; 691 } 692 693 /* some device information might have changed because of a CIS 694 * update or because we can finally read it correctly... so 695 * determine it again, overwriting old values if necessary. */ 696 bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery_callback); 697 698 /* if the CIS changed, we need to check whether the number of 699 * functions changed. */ 700 if (s->fake_cis) { 701 int old_funcs, new_funcs; 702 cistpl_longlink_mfc_t mfc; 703 704 /* does this cis override add or remove functions? */ 705 old_funcs = s->functions; 706 707 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, 708 &mfc)) 709 new_funcs = mfc.nfn; 710 else 711 new_funcs = 1; 712 if (old_funcs != new_funcs) { 713 /* we need to re-start */ 714 pcmcia_card_remove(s, NULL); 715 s->functions = 0; 716 pcmcia_card_add(s); 717 } 718 } 719 720 /* If the PCMCIA device consists of two pseudo devices, 721 * call pcmcia_device_add() -- which will fail if both 722 * devices are already registered. */ 723 mutex_lock(&s->ops_mutex); 724 has_pfc = s->pcmcia_pfc; 725 mutex_unlock(&s->ops_mutex); 726 if (has_pfc) 727 pcmcia_device_add(s, 0); 728 729 /* we re-scan all devices, not just the ones connected to this 730 * socket. This does not matter, though. */ 731 if (bus_rescan_devices(&pcmcia_bus_type)) 732 dev_warn(&s->dev, "rescanning the bus failed\n"); 733 } 734 735 736 #ifdef CONFIG_PCMCIA_LOAD_CIS 737 738 /** 739 * pcmcia_load_firmware - load CIS from userspace if device-provided is broken 740 * @dev: the pcmcia device which needs a CIS override 741 * @filename: requested filename in /lib/firmware/ 742 * 743 * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if 744 * the one provided by the card is broken. The firmware files reside in 745 * /lib/firmware/ in userspace. 746 */ 747 static int pcmcia_load_firmware(struct pcmcia_device *dev, char *filename) 748 { 749 struct pcmcia_socket *s = dev->socket; 750 const struct firmware *fw; 751 int ret = -ENOMEM; 752 cistpl_longlink_mfc_t mfc; 753 int old_funcs, new_funcs = 1; 754 755 if (!filename) 756 return -EINVAL; 757 758 dev_dbg(&dev->dev, "trying to load CIS file %s\n", filename); 759 760 if (request_firmware(&fw, filename, &dev->dev) == 0) { 761 if (fw->size >= CISTPL_MAX_CIS_SIZE) { 762 ret = -EINVAL; 763 dev_err(&dev->dev, "pcmcia: CIS override is too big\n"); 764 goto release; 765 } 766 767 if (!pcmcia_replace_cis(s, fw->data, fw->size)) 768 ret = 0; 769 else { 770 dev_err(&dev->dev, "pcmcia: CIS override failed\n"); 771 goto release; 772 } 773 774 /* we need to re-start if the number of functions changed */ 775 old_funcs = s->functions; 776 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, 777 &mfc)) 778 new_funcs = mfc.nfn; 779 780 if (old_funcs != new_funcs) 781 ret = -EBUSY; 782 783 /* update information */ 784 pcmcia_device_query(dev); 785 786 /* requery (as number of functions might have changed) */ 787 pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY); 788 } 789 release: 790 release_firmware(fw); 791 792 return ret; 793 } 794 795 #else /* !CONFIG_PCMCIA_LOAD_CIS */ 796 797 static inline int pcmcia_load_firmware(struct pcmcia_device *dev, 798 char *filename) 799 { 800 return -ENODEV; 801 } 802 803 #endif 804 805 806 static inline int pcmcia_devmatch(struct pcmcia_device *dev, 807 const struct pcmcia_device_id *did) 808 { 809 if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) { 810 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id)) 811 return 0; 812 } 813 814 if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) { 815 if ((!dev->has_card_id) || (dev->card_id != did->card_id)) 816 return 0; 817 } 818 819 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) { 820 if (dev->func != did->function) 821 return 0; 822 } 823 824 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) { 825 if (!dev->prod_id[0]) 826 return 0; 827 if (strcmp(did->prod_id[0], dev->prod_id[0])) 828 return 0; 829 } 830 831 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) { 832 if (!dev->prod_id[1]) 833 return 0; 834 if (strcmp(did->prod_id[1], dev->prod_id[1])) 835 return 0; 836 } 837 838 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) { 839 if (!dev->prod_id[2]) 840 return 0; 841 if (strcmp(did->prod_id[2], dev->prod_id[2])) 842 return 0; 843 } 844 845 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) { 846 if (!dev->prod_id[3]) 847 return 0; 848 if (strcmp(did->prod_id[3], dev->prod_id[3])) 849 return 0; 850 } 851 852 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) { 853 dev_dbg(&dev->dev, "this is a pseudo-multi-function device\n"); 854 mutex_lock(&dev->socket->ops_mutex); 855 dev->socket->pcmcia_pfc = 1; 856 mutex_unlock(&dev->socket->ops_mutex); 857 if (dev->device_no != did->device_no) 858 return 0; 859 } 860 861 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) { 862 int ret; 863 864 if ((!dev->has_func_id) || (dev->func_id != did->func_id)) 865 return 0; 866 867 /* if this is a pseudo-multi-function device, 868 * we need explicit matches */ 869 if (dev->socket->pcmcia_pfc) 870 return 0; 871 if (dev->device_no) 872 return 0; 873 874 /* also, FUNC_ID matching needs to be activated by userspace 875 * after it has re-checked that there is no possible module 876 * with a prod_id/manf_id/card_id match. 877 */ 878 mutex_lock(&dev->socket->ops_mutex); 879 ret = dev->allow_func_id_match; 880 mutex_unlock(&dev->socket->ops_mutex); 881 882 if (!ret) { 883 dev_dbg(&dev->dev, 884 "skipping FUNC_ID match until userspace ACK\n"); 885 return 0; 886 } 887 } 888 889 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) { 890 dev_dbg(&dev->dev, "device needs a fake CIS\n"); 891 if (!dev->socket->fake_cis) 892 if (pcmcia_load_firmware(dev, did->cisfile)) 893 return 0; 894 } 895 896 if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) { 897 int i; 898 for (i = 0; i < 4; i++) 899 if (dev->prod_id[i]) 900 return 0; 901 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id) 902 return 0; 903 } 904 905 return 1; 906 } 907 908 909 static int pcmcia_bus_match(struct device *dev, struct device_driver *drv) 910 { 911 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 912 struct pcmcia_driver *p_drv = to_pcmcia_drv(drv); 913 const struct pcmcia_device_id *did = p_drv->id_table; 914 struct pcmcia_dynid *dynid; 915 916 /* match dynamic devices first */ 917 mutex_lock(&p_drv->dynids.lock); 918 list_for_each_entry(dynid, &p_drv->dynids.list, node) { 919 dev_dbg(dev, "trying to match to %s\n", drv->name); 920 if (pcmcia_devmatch(p_dev, &dynid->id)) { 921 dev_dbg(dev, "matched to %s\n", drv->name); 922 mutex_unlock(&p_drv->dynids.lock); 923 return 1; 924 } 925 } 926 mutex_unlock(&p_drv->dynids.lock); 927 928 while (did && did->match_flags) { 929 dev_dbg(dev, "trying to match to %s\n", drv->name); 930 if (pcmcia_devmatch(p_dev, did)) { 931 dev_dbg(dev, "matched to %s\n", drv->name); 932 return 1; 933 } 934 did++; 935 } 936 937 return 0; 938 } 939 940 static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env) 941 { 942 struct pcmcia_device *p_dev; 943 int i; 944 u32 hash[4] = { 0, 0, 0, 0}; 945 946 if (!dev) 947 return -ENODEV; 948 949 p_dev = to_pcmcia_dev(dev); 950 951 /* calculate hashes */ 952 for (i = 0; i < 4; i++) { 953 if (!p_dev->prod_id[i]) 954 continue; 955 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i])); 956 } 957 958 if (add_uevent_var(env, "SOCKET_NO=%u", p_dev->socket->sock)) 959 return -ENOMEM; 960 961 if (add_uevent_var(env, "DEVICE_NO=%02X", p_dev->device_no)) 962 return -ENOMEM; 963 964 if (add_uevent_var(env, "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X" 965 "pa%08Xpb%08Xpc%08Xpd%08X", 966 p_dev->has_manf_id ? p_dev->manf_id : 0, 967 p_dev->has_card_id ? p_dev->card_id : 0, 968 p_dev->has_func_id ? p_dev->func_id : 0, 969 p_dev->func, 970 p_dev->device_no, 971 hash[0], 972 hash[1], 973 hash[2], 974 hash[3])) 975 return -ENOMEM; 976 977 return 0; 978 } 979 980 /************************ runtime PM support ***************************/ 981 982 static int pcmcia_dev_suspend(struct device *dev, pm_message_t state); 983 static int pcmcia_dev_resume(struct device *dev); 984 985 static int runtime_suspend(struct device *dev) 986 { 987 int rc; 988 989 device_lock(dev); 990 rc = pcmcia_dev_suspend(dev, PMSG_SUSPEND); 991 device_unlock(dev); 992 return rc; 993 } 994 995 static int runtime_resume(struct device *dev) 996 { 997 int rc; 998 999 device_lock(dev); 1000 rc = pcmcia_dev_resume(dev); 1001 device_unlock(dev); 1002 return rc; 1003 } 1004 1005 /************************ per-device sysfs output ***************************/ 1006 1007 #define pcmcia_device_attr(field, test, format) \ 1008 static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf) \ 1009 { \ 1010 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \ 1011 return p_dev->test ? sprintf(buf, format, p_dev->field) : -ENODEV; \ 1012 } \ 1013 static DEVICE_ATTR_RO(field); 1014 1015 #define pcmcia_device_stringattr(name, field) \ 1016 static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf) \ 1017 { \ 1018 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \ 1019 return p_dev->field ? sprintf(buf, "%s\n", p_dev->field) : -ENODEV; \ 1020 } \ 1021 static DEVICE_ATTR_RO(name); 1022 1023 pcmcia_device_attr(func_id, has_func_id, "0x%02x\n"); 1024 pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n"); 1025 pcmcia_device_attr(card_id, has_card_id, "0x%04x\n"); 1026 pcmcia_device_stringattr(prod_id1, prod_id[0]); 1027 pcmcia_device_stringattr(prod_id2, prod_id[1]); 1028 pcmcia_device_stringattr(prod_id3, prod_id[2]); 1029 pcmcia_device_stringattr(prod_id4, prod_id[3]); 1030 1031 static ssize_t function_show(struct device *dev, struct device_attribute *attr, 1032 char *buf) 1033 { 1034 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1035 return p_dev->socket ? sprintf(buf, "0x%02x\n", p_dev->func) : -ENODEV; 1036 } 1037 static DEVICE_ATTR_RO(function); 1038 1039 static ssize_t resources_show(struct device *dev, 1040 struct device_attribute *attr, char *buf) 1041 { 1042 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1043 char *str = buf; 1044 int i; 1045 1046 for (i = 0; i < PCMCIA_NUM_RESOURCES; i++) 1047 str += sprintf(str, "%pr\n", p_dev->resource[i]); 1048 1049 return str - buf; 1050 } 1051 static DEVICE_ATTR_RO(resources); 1052 1053 static ssize_t pm_state_show(struct device *dev, struct device_attribute *attr, char *buf) 1054 { 1055 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1056 1057 if (p_dev->suspended) 1058 return sprintf(buf, "off\n"); 1059 else 1060 return sprintf(buf, "on\n"); 1061 } 1062 1063 static ssize_t pm_state_store(struct device *dev, struct device_attribute *attr, 1064 const char *buf, size_t count) 1065 { 1066 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1067 int ret = 0; 1068 1069 if (!count) 1070 return -EINVAL; 1071 1072 if ((!p_dev->suspended) && !strncmp(buf, "off", 3)) 1073 ret = runtime_suspend(dev); 1074 else if (p_dev->suspended && !strncmp(buf, "on", 2)) 1075 ret = runtime_resume(dev); 1076 1077 return ret ? ret : count; 1078 } 1079 static DEVICE_ATTR_RW(pm_state); 1080 1081 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf) 1082 { 1083 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1084 int i; 1085 u32 hash[4] = { 0, 0, 0, 0}; 1086 1087 /* calculate hashes */ 1088 for (i = 0; i < 4; i++) { 1089 if (!p_dev->prod_id[i]) 1090 continue; 1091 hash[i] = crc32(0, p_dev->prod_id[i], 1092 strlen(p_dev->prod_id[i])); 1093 } 1094 return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X" 1095 "pa%08Xpb%08Xpc%08Xpd%08X\n", 1096 p_dev->has_manf_id ? p_dev->manf_id : 0, 1097 p_dev->has_card_id ? p_dev->card_id : 0, 1098 p_dev->has_func_id ? p_dev->func_id : 0, 1099 p_dev->func, p_dev->device_no, 1100 hash[0], hash[1], hash[2], hash[3]); 1101 } 1102 static DEVICE_ATTR_RO(modalias); 1103 1104 static ssize_t allow_func_id_match_store(struct device *dev, 1105 struct device_attribute *attr, const char *buf, size_t count) 1106 { 1107 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1108 1109 if (!count) 1110 return -EINVAL; 1111 1112 mutex_lock(&p_dev->socket->ops_mutex); 1113 p_dev->allow_func_id_match = 1; 1114 mutex_unlock(&p_dev->socket->ops_mutex); 1115 pcmcia_parse_uevents(p_dev->socket, PCMCIA_UEVENT_REQUERY); 1116 1117 return count; 1118 } 1119 static DEVICE_ATTR_WO(allow_func_id_match); 1120 1121 static struct attribute *pcmcia_dev_attrs[] = { 1122 &dev_attr_resources.attr, 1123 &dev_attr_pm_state.attr, 1124 &dev_attr_function.attr, 1125 &dev_attr_func_id.attr, 1126 &dev_attr_manf_id.attr, 1127 &dev_attr_card_id.attr, 1128 &dev_attr_prod_id1.attr, 1129 &dev_attr_prod_id2.attr, 1130 &dev_attr_prod_id3.attr, 1131 &dev_attr_prod_id4.attr, 1132 &dev_attr_modalias.attr, 1133 &dev_attr_allow_func_id_match.attr, 1134 NULL, 1135 }; 1136 ATTRIBUTE_GROUPS(pcmcia_dev); 1137 1138 /* PM support, also needed for reset */ 1139 1140 static int pcmcia_dev_suspend(struct device *dev, pm_message_t state) 1141 { 1142 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1143 struct pcmcia_driver *p_drv = NULL; 1144 int ret = 0; 1145 1146 mutex_lock(&p_dev->socket->ops_mutex); 1147 if (p_dev->suspended) { 1148 mutex_unlock(&p_dev->socket->ops_mutex); 1149 return 0; 1150 } 1151 p_dev->suspended = 1; 1152 mutex_unlock(&p_dev->socket->ops_mutex); 1153 1154 dev_dbg(dev, "suspending\n"); 1155 1156 if (dev->driver) 1157 p_drv = to_pcmcia_drv(dev->driver); 1158 1159 if (!p_drv) 1160 goto out; 1161 1162 if (p_drv->suspend) { 1163 ret = p_drv->suspend(p_dev); 1164 if (ret) { 1165 dev_err(dev, 1166 "pcmcia: device %s (driver %s) did not want to go to sleep (%d)\n", 1167 p_dev->devname, p_drv->name, ret); 1168 mutex_lock(&p_dev->socket->ops_mutex); 1169 p_dev->suspended = 0; 1170 mutex_unlock(&p_dev->socket->ops_mutex); 1171 goto out; 1172 } 1173 } 1174 1175 if (p_dev->device_no == p_dev->func) { 1176 dev_dbg(dev, "releasing configuration\n"); 1177 pcmcia_release_configuration(p_dev); 1178 } 1179 1180 out: 1181 return ret; 1182 } 1183 1184 1185 static int pcmcia_dev_resume(struct device *dev) 1186 { 1187 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1188 struct pcmcia_driver *p_drv = NULL; 1189 int ret = 0; 1190 1191 mutex_lock(&p_dev->socket->ops_mutex); 1192 if (!p_dev->suspended) { 1193 mutex_unlock(&p_dev->socket->ops_mutex); 1194 return 0; 1195 } 1196 p_dev->suspended = 0; 1197 mutex_unlock(&p_dev->socket->ops_mutex); 1198 1199 dev_dbg(dev, "resuming\n"); 1200 1201 if (dev->driver) 1202 p_drv = to_pcmcia_drv(dev->driver); 1203 1204 if (!p_drv) 1205 goto out; 1206 1207 if (p_dev->device_no == p_dev->func) { 1208 dev_dbg(dev, "requesting configuration\n"); 1209 ret = pcmcia_enable_device(p_dev); 1210 if (ret) 1211 goto out; 1212 } 1213 1214 if (p_drv->resume) 1215 ret = p_drv->resume(p_dev); 1216 1217 out: 1218 return ret; 1219 } 1220 1221 1222 static int pcmcia_bus_suspend_callback(struct device *dev, void *_data) 1223 { 1224 struct pcmcia_socket *skt = _data; 1225 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1226 1227 if (p_dev->socket != skt || p_dev->suspended) 1228 return 0; 1229 1230 return runtime_suspend(dev); 1231 } 1232 1233 static int pcmcia_bus_resume_callback(struct device *dev, void *_data) 1234 { 1235 struct pcmcia_socket *skt = _data; 1236 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1237 1238 if (p_dev->socket != skt || !p_dev->suspended) 1239 return 0; 1240 1241 runtime_resume(dev); 1242 1243 return 0; 1244 } 1245 1246 static int pcmcia_bus_resume(struct pcmcia_socket *skt) 1247 { 1248 dev_dbg(&skt->dev, "resuming socket %d\n", skt->sock); 1249 bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback); 1250 return 0; 1251 } 1252 1253 static int pcmcia_bus_suspend(struct pcmcia_socket *skt) 1254 { 1255 dev_dbg(&skt->dev, "suspending socket %d\n", skt->sock); 1256 if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt, 1257 pcmcia_bus_suspend_callback)) { 1258 pcmcia_bus_resume(skt); 1259 return -EIO; 1260 } 1261 return 0; 1262 } 1263 1264 static int pcmcia_bus_remove(struct pcmcia_socket *skt) 1265 { 1266 atomic_set(&skt->present, 0); 1267 pcmcia_card_remove(skt, NULL); 1268 1269 mutex_lock(&skt->ops_mutex); 1270 destroy_cis_cache(skt); 1271 pcmcia_cleanup_irq(skt); 1272 mutex_unlock(&skt->ops_mutex); 1273 1274 return 0; 1275 } 1276 1277 static int pcmcia_bus_add(struct pcmcia_socket *skt) 1278 { 1279 atomic_set(&skt->present, 1); 1280 1281 mutex_lock(&skt->ops_mutex); 1282 skt->pcmcia_pfc = 0; 1283 destroy_cis_cache(skt); /* to be on the safe side... */ 1284 mutex_unlock(&skt->ops_mutex); 1285 1286 pcmcia_card_add(skt); 1287 1288 return 0; 1289 } 1290 1291 static int pcmcia_bus_early_resume(struct pcmcia_socket *skt) 1292 { 1293 if (!verify_cis_cache(skt)) 1294 return 0; 1295 1296 dev_dbg(&skt->dev, "cis mismatch - different card\n"); 1297 1298 /* first, remove the card */ 1299 pcmcia_bus_remove(skt); 1300 1301 mutex_lock(&skt->ops_mutex); 1302 destroy_cis_cache(skt); 1303 kfree(skt->fake_cis); 1304 skt->fake_cis = NULL; 1305 skt->functions = 0; 1306 mutex_unlock(&skt->ops_mutex); 1307 1308 /* now, add the new card */ 1309 pcmcia_bus_add(skt); 1310 return 0; 1311 } 1312 1313 1314 /* 1315 * NOTE: This is racy. There's no guarantee the card will still be 1316 * physically present, even if the call to this function returns 1317 * non-NULL. Furthermore, the device driver most likely is unbound 1318 * almost immediately, so the timeframe where pcmcia_dev_present 1319 * returns NULL is probably really really small. 1320 */ 1321 struct pcmcia_device *pcmcia_dev_present(struct pcmcia_device *_p_dev) 1322 { 1323 struct pcmcia_device *p_dev; 1324 struct pcmcia_device *ret = NULL; 1325 1326 p_dev = pcmcia_get_dev(_p_dev); 1327 if (!p_dev) 1328 return NULL; 1329 1330 if (atomic_read(&p_dev->socket->present) != 0) 1331 ret = p_dev; 1332 1333 pcmcia_put_dev(p_dev); 1334 return ret; 1335 } 1336 EXPORT_SYMBOL(pcmcia_dev_present); 1337 1338 1339 static struct pcmcia_callback pcmcia_bus_callback = { 1340 .owner = THIS_MODULE, 1341 .add = pcmcia_bus_add, 1342 .remove = pcmcia_bus_remove, 1343 .requery = pcmcia_requery, 1344 .validate = pccard_validate_cis, 1345 .suspend = pcmcia_bus_suspend, 1346 .early_resume = pcmcia_bus_early_resume, 1347 .resume = pcmcia_bus_resume, 1348 }; 1349 1350 static int pcmcia_bus_add_socket(struct device *dev, 1351 struct class_interface *class_intf) 1352 { 1353 struct pcmcia_socket *socket = dev_get_drvdata(dev); 1354 int ret; 1355 1356 socket = pcmcia_get_socket(socket); 1357 if (!socket) { 1358 dev_err(dev, "PCMCIA obtaining reference to socket failed\n"); 1359 return -ENODEV; 1360 } 1361 1362 ret = sysfs_create_bin_file(&dev->kobj, &pccard_cis_attr); 1363 if (ret) { 1364 dev_err(dev, "PCMCIA registration failed\n"); 1365 pcmcia_put_socket(socket); 1366 return ret; 1367 } 1368 1369 INIT_LIST_HEAD(&socket->devices_list); 1370 socket->pcmcia_pfc = 0; 1371 socket->device_count = 0; 1372 atomic_set(&socket->present, 0); 1373 1374 ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback); 1375 if (ret) { 1376 dev_err(dev, "PCMCIA registration failed\n"); 1377 pcmcia_put_socket(socket); 1378 return ret; 1379 } 1380 1381 return 0; 1382 } 1383 1384 static void pcmcia_bus_remove_socket(struct device *dev, 1385 struct class_interface *class_intf) 1386 { 1387 struct pcmcia_socket *socket = dev_get_drvdata(dev); 1388 1389 if (!socket) 1390 return; 1391 1392 pccard_register_pcmcia(socket, NULL); 1393 1394 /* unregister any unbound devices */ 1395 mutex_lock(&socket->skt_mutex); 1396 pcmcia_card_remove(socket, NULL); 1397 release_cis_mem(socket); 1398 mutex_unlock(&socket->skt_mutex); 1399 1400 sysfs_remove_bin_file(&dev->kobj, &pccard_cis_attr); 1401 1402 pcmcia_put_socket(socket); 1403 1404 return; 1405 } 1406 1407 1408 /* the pcmcia_bus_interface is used to handle pcmcia socket devices */ 1409 static struct class_interface pcmcia_bus_interface __refdata = { 1410 .class = &pcmcia_socket_class, 1411 .add_dev = &pcmcia_bus_add_socket, 1412 .remove_dev = &pcmcia_bus_remove_socket, 1413 }; 1414 1415 1416 struct bus_type pcmcia_bus_type = { 1417 .name = "pcmcia", 1418 .uevent = pcmcia_bus_uevent, 1419 .match = pcmcia_bus_match, 1420 .dev_groups = pcmcia_dev_groups, 1421 .probe = pcmcia_device_probe, 1422 .remove = pcmcia_device_remove, 1423 .suspend = pcmcia_dev_suspend, 1424 .resume = pcmcia_dev_resume, 1425 }; 1426 1427 1428 static int __init init_pcmcia_bus(void) 1429 { 1430 int ret; 1431 1432 ret = bus_register(&pcmcia_bus_type); 1433 if (ret < 0) { 1434 printk(KERN_WARNING "pcmcia: bus_register error: %d\n", ret); 1435 return ret; 1436 } 1437 ret = class_interface_register(&pcmcia_bus_interface); 1438 if (ret < 0) { 1439 printk(KERN_WARNING 1440 "pcmcia: class_interface_register error: %d\n", ret); 1441 bus_unregister(&pcmcia_bus_type); 1442 return ret; 1443 } 1444 1445 return 0; 1446 } 1447 fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that 1448 * pcmcia_socket_class is already registered */ 1449 1450 1451 static void __exit exit_pcmcia_bus(void) 1452 { 1453 class_interface_unregister(&pcmcia_bus_interface); 1454 1455 bus_unregister(&pcmcia_bus_type); 1456 } 1457 module_exit(exit_pcmcia_bus); 1458 1459 1460 MODULE_ALIAS("ds"); 1461