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 - 2005 Dominik Brodowski 14 */ 15 16 #include <linux/config.h> 17 #include <linux/kernel.h> 18 #include <linux/module.h> 19 #include <linux/init.h> 20 #include <linux/errno.h> 21 #include <linux/list.h> 22 #include <linux/delay.h> 23 #include <linux/workqueue.h> 24 #include <linux/crc32.h> 25 #include <linux/firmware.h> 26 27 #define IN_CARD_SERVICES 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 #include "ds_internal.h" 36 37 /*====================================================================*/ 38 39 /* Module parameters */ 40 41 MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>"); 42 MODULE_DESCRIPTION("PCMCIA Driver Services"); 43 MODULE_LICENSE("GPL"); 44 45 #ifdef DEBUG 46 int ds_pc_debug; 47 48 module_param_named(pc_debug, ds_pc_debug, int, 0644); 49 50 #define ds_dbg(lvl, fmt, arg...) do { \ 51 if (ds_pc_debug > (lvl)) \ 52 printk(KERN_DEBUG "ds: " fmt , ## arg); \ 53 } while (0) 54 #else 55 #define ds_dbg(lvl, fmt, arg...) do { } while (0) 56 #endif 57 58 spinlock_t pcmcia_dev_list_lock; 59 60 static int unbind_request(struct pcmcia_socket *s); 61 62 /*====================================================================*/ 63 64 /* code which was in cs.c before */ 65 66 /* String tables for error messages */ 67 68 typedef struct lookup_t { 69 int key; 70 char *msg; 71 } lookup_t; 72 73 static const lookup_t error_table[] = { 74 { CS_SUCCESS, "Operation succeeded" }, 75 { CS_BAD_ADAPTER, "Bad adapter" }, 76 { CS_BAD_ATTRIBUTE, "Bad attribute", }, 77 { CS_BAD_BASE, "Bad base address" }, 78 { CS_BAD_EDC, "Bad EDC" }, 79 { CS_BAD_IRQ, "Bad IRQ" }, 80 { CS_BAD_OFFSET, "Bad offset" }, 81 { CS_BAD_PAGE, "Bad page number" }, 82 { CS_READ_FAILURE, "Read failure" }, 83 { CS_BAD_SIZE, "Bad size" }, 84 { CS_BAD_SOCKET, "Bad socket" }, 85 { CS_BAD_TYPE, "Bad type" }, 86 { CS_BAD_VCC, "Bad Vcc" }, 87 { CS_BAD_VPP, "Bad Vpp" }, 88 { CS_BAD_WINDOW, "Bad window" }, 89 { CS_WRITE_FAILURE, "Write failure" }, 90 { CS_NO_CARD, "No card present" }, 91 { CS_UNSUPPORTED_FUNCTION, "Usupported function" }, 92 { CS_UNSUPPORTED_MODE, "Unsupported mode" }, 93 { CS_BAD_SPEED, "Bad speed" }, 94 { CS_BUSY, "Resource busy" }, 95 { CS_GENERAL_FAILURE, "General failure" }, 96 { CS_WRITE_PROTECTED, "Write protected" }, 97 { CS_BAD_ARG_LENGTH, "Bad argument length" }, 98 { CS_BAD_ARGS, "Bad arguments" }, 99 { CS_CONFIGURATION_LOCKED, "Configuration locked" }, 100 { CS_IN_USE, "Resource in use" }, 101 { CS_NO_MORE_ITEMS, "No more items" }, 102 { CS_OUT_OF_RESOURCE, "Out of resource" }, 103 { CS_BAD_HANDLE, "Bad handle" }, 104 { CS_BAD_TUPLE, "Bad CIS tuple" } 105 }; 106 107 108 static const lookup_t service_table[] = { 109 { AccessConfigurationRegister, "AccessConfigurationRegister" }, 110 { AddSocketServices, "AddSocketServices" }, 111 { AdjustResourceInfo, "AdjustResourceInfo" }, 112 { CheckEraseQueue, "CheckEraseQueue" }, 113 { CloseMemory, "CloseMemory" }, 114 { DeregisterClient, "DeregisterClient" }, 115 { DeregisterEraseQueue, "DeregisterEraseQueue" }, 116 { GetCardServicesInfo, "GetCardServicesInfo" }, 117 { GetClientInfo, "GetClientInfo" }, 118 { GetConfigurationInfo, "GetConfigurationInfo" }, 119 { GetEventMask, "GetEventMask" }, 120 { GetFirstClient, "GetFirstClient" }, 121 { GetFirstRegion, "GetFirstRegion" }, 122 { GetFirstTuple, "GetFirstTuple" }, 123 { GetNextClient, "GetNextClient" }, 124 { GetNextRegion, "GetNextRegion" }, 125 { GetNextTuple, "GetNextTuple" }, 126 { GetStatus, "GetStatus" }, 127 { GetTupleData, "GetTupleData" }, 128 { MapMemPage, "MapMemPage" }, 129 { ModifyConfiguration, "ModifyConfiguration" }, 130 { ModifyWindow, "ModifyWindow" }, 131 { OpenMemory, "OpenMemory" }, 132 { ParseTuple, "ParseTuple" }, 133 { ReadMemory, "ReadMemory" }, 134 { RegisterClient, "RegisterClient" }, 135 { RegisterEraseQueue, "RegisterEraseQueue" }, 136 { RegisterMTD, "RegisterMTD" }, 137 { ReleaseConfiguration, "ReleaseConfiguration" }, 138 { ReleaseIO, "ReleaseIO" }, 139 { ReleaseIRQ, "ReleaseIRQ" }, 140 { ReleaseWindow, "ReleaseWindow" }, 141 { RequestConfiguration, "RequestConfiguration" }, 142 { RequestIO, "RequestIO" }, 143 { RequestIRQ, "RequestIRQ" }, 144 { RequestSocketMask, "RequestSocketMask" }, 145 { RequestWindow, "RequestWindow" }, 146 { ResetCard, "ResetCard" }, 147 { SetEventMask, "SetEventMask" }, 148 { ValidateCIS, "ValidateCIS" }, 149 { WriteMemory, "WriteMemory" }, 150 { BindDevice, "BindDevice" }, 151 { BindMTD, "BindMTD" }, 152 { ReportError, "ReportError" }, 153 { SuspendCard, "SuspendCard" }, 154 { ResumeCard, "ResumeCard" }, 155 { EjectCard, "EjectCard" }, 156 { InsertCard, "InsertCard" }, 157 { ReplaceCIS, "ReplaceCIS" } 158 }; 159 160 161 static int pcmcia_report_error(struct pcmcia_device *p_dev, error_info_t *err) 162 { 163 int i; 164 char *serv; 165 166 if (!p_dev) 167 printk(KERN_NOTICE); 168 else 169 printk(KERN_NOTICE "%s: ", p_dev->dev.bus_id); 170 171 for (i = 0; i < ARRAY_SIZE(service_table); i++) 172 if (service_table[i].key == err->func) 173 break; 174 if (i < ARRAY_SIZE(service_table)) 175 serv = service_table[i].msg; 176 else 177 serv = "Unknown service number"; 178 179 for (i = 0; i < ARRAY_SIZE(error_table); i++) 180 if (error_table[i].key == err->retcode) 181 break; 182 if (i < ARRAY_SIZE(error_table)) 183 printk("%s: %s\n", serv, error_table[i].msg); 184 else 185 printk("%s: Unknown error code %#x\n", serv, err->retcode); 186 187 return CS_SUCCESS; 188 } /* report_error */ 189 190 /* end of code which was in cs.c before */ 191 192 /*======================================================================*/ 193 194 void cs_error(struct pcmcia_device *p_dev, int func, int ret) 195 { 196 error_info_t err = { func, ret }; 197 pcmcia_report_error(p_dev, &err); 198 } 199 EXPORT_SYMBOL(cs_error); 200 201 202 static void pcmcia_check_driver(struct pcmcia_driver *p_drv) 203 { 204 struct pcmcia_device_id *did = p_drv->id_table; 205 unsigned int i; 206 u32 hash; 207 208 if (!p_drv->attach || !p_drv->event || !p_drv->detach) 209 printk(KERN_DEBUG "pcmcia: %s does misses a callback function", 210 p_drv->drv.name); 211 212 while (did && did->match_flags) { 213 for (i=0; i<4; i++) { 214 if (!did->prod_id[i]) 215 continue; 216 217 hash = crc32(0, did->prod_id[i], strlen(did->prod_id[i])); 218 if (hash == did->prod_id_hash[i]) 219 continue; 220 221 printk(KERN_DEBUG "pcmcia: %s: invalid hash for " 222 "product string \"%s\": is 0x%x, should " 223 "be 0x%x\n", p_drv->drv.name, did->prod_id[i], 224 did->prod_id_hash[i], hash); 225 printk(KERN_DEBUG "pcmcia: see " 226 "Documentation/pcmcia/devicetable.txt for " 227 "details\n"); 228 } 229 did++; 230 } 231 232 return; 233 } 234 235 236 #ifdef CONFIG_PCMCIA_LOAD_CIS 237 238 /** 239 * pcmcia_load_firmware - load CIS from userspace if device-provided is broken 240 * @dev - the pcmcia device which needs a CIS override 241 * @filename - requested filename in /lib/firmware/cis/ 242 * 243 * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if 244 * the one provided by the card is broken. The firmware files reside in 245 * /lib/firmware/cis/ in userspace. 246 */ 247 static int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename) 248 { 249 struct pcmcia_socket *s = dev->socket; 250 const struct firmware *fw; 251 char path[20]; 252 int ret=-ENOMEM; 253 cisdump_t *cis; 254 255 if (!filename) 256 return -EINVAL; 257 258 ds_dbg(1, "trying to load firmware %s\n", filename); 259 260 if (strlen(filename) > 14) 261 return -EINVAL; 262 263 snprintf(path, 20, "%s", filename); 264 265 if (request_firmware(&fw, path, &dev->dev) == 0) { 266 if (fw->size >= CISTPL_MAX_CIS_SIZE) 267 goto release; 268 269 cis = kmalloc(sizeof(cisdump_t), GFP_KERNEL); 270 if (!cis) 271 goto release; 272 273 memset(cis, 0, sizeof(cisdump_t)); 274 275 cis->Length = fw->size + 1; 276 memcpy(cis->Data, fw->data, fw->size); 277 278 if (!pcmcia_replace_cis(s, cis)) 279 ret = 0; 280 } 281 release: 282 release_firmware(fw); 283 284 return (ret); 285 } 286 287 #else /* !CONFIG_PCMCIA_LOAD_CIS */ 288 289 static inline int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename) 290 { 291 return -ENODEV; 292 } 293 294 #endif 295 296 297 /*======================================================================*/ 298 299 300 /** 301 * pcmcia_register_driver - register a PCMCIA driver with the bus core 302 * 303 * Registers a PCMCIA driver with the PCMCIA bus core. 304 */ 305 static int pcmcia_device_probe(struct device *dev); 306 static int pcmcia_device_remove(struct device * dev); 307 308 int pcmcia_register_driver(struct pcmcia_driver *driver) 309 { 310 if (!driver) 311 return -EINVAL; 312 313 pcmcia_check_driver(driver); 314 315 /* initialize common fields */ 316 driver->drv.bus = &pcmcia_bus_type; 317 driver->drv.owner = driver->owner; 318 driver->drv.probe = pcmcia_device_probe; 319 driver->drv.remove = pcmcia_device_remove; 320 321 return driver_register(&driver->drv); 322 } 323 EXPORT_SYMBOL(pcmcia_register_driver); 324 325 /** 326 * pcmcia_unregister_driver - unregister a PCMCIA driver with the bus core 327 */ 328 void pcmcia_unregister_driver(struct pcmcia_driver *driver) 329 { 330 driver_unregister(&driver->drv); 331 } 332 EXPORT_SYMBOL(pcmcia_unregister_driver); 333 334 335 /* pcmcia_device handling */ 336 337 struct pcmcia_device * pcmcia_get_dev(struct pcmcia_device *p_dev) 338 { 339 struct device *tmp_dev; 340 tmp_dev = get_device(&p_dev->dev); 341 if (!tmp_dev) 342 return NULL; 343 return to_pcmcia_dev(tmp_dev); 344 } 345 346 void pcmcia_put_dev(struct pcmcia_device *p_dev) 347 { 348 if (p_dev) 349 put_device(&p_dev->dev); 350 } 351 352 static void pcmcia_release_dev(struct device *dev) 353 { 354 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 355 ds_dbg(1, "releasing dev %p\n", p_dev); 356 pcmcia_put_socket(p_dev->socket); 357 kfree(p_dev); 358 } 359 360 361 static int pcmcia_device_probe(struct device * dev) 362 { 363 struct pcmcia_device *p_dev; 364 struct pcmcia_driver *p_drv; 365 int ret = 0; 366 367 dev = get_device(dev); 368 if (!dev) 369 return -ENODEV; 370 371 p_dev = to_pcmcia_dev(dev); 372 p_drv = to_pcmcia_drv(dev->driver); 373 374 if (!try_module_get(p_drv->owner)) { 375 ret = -EINVAL; 376 goto put_dev; 377 } 378 379 if (p_drv->attach) { 380 p_dev->instance = p_drv->attach(); 381 if ((!p_dev->instance) || (p_dev->state & CLIENT_UNBOUND)) { 382 printk(KERN_NOTICE "ds: unable to create instance " 383 "of '%s'!\n", p_drv->drv.name); 384 ret = -EINVAL; 385 } 386 } 387 388 if (ret) 389 module_put(p_drv->owner); 390 put_dev: 391 if ((ret) || !(p_drv->attach)) 392 put_device(dev); 393 return (ret); 394 } 395 396 397 static int pcmcia_device_remove(struct device * dev) 398 { 399 struct pcmcia_device *p_dev; 400 struct pcmcia_driver *p_drv; 401 402 /* detach the "instance" */ 403 p_dev = to_pcmcia_dev(dev); 404 p_drv = to_pcmcia_drv(dev->driver); 405 406 if (p_drv) { 407 if ((p_drv->detach) && (p_dev->instance)) { 408 p_drv->detach(p_dev->instance); 409 /* from pcmcia_probe_device */ 410 put_device(&p_dev->dev); 411 } 412 module_put(p_drv->owner); 413 } 414 415 return 0; 416 } 417 418 419 420 /* 421 * pcmcia_device_query -- determine information about a pcmcia device 422 */ 423 static int pcmcia_device_query(struct pcmcia_device *p_dev) 424 { 425 cistpl_manfid_t manf_id; 426 cistpl_funcid_t func_id; 427 cistpl_vers_1_t vers1; 428 unsigned int i; 429 430 if (!pccard_read_tuple(p_dev->socket, p_dev->func, 431 CISTPL_MANFID, &manf_id)) { 432 p_dev->manf_id = manf_id.manf; 433 p_dev->card_id = manf_id.card; 434 p_dev->has_manf_id = 1; 435 p_dev->has_card_id = 1; 436 } 437 438 if (!pccard_read_tuple(p_dev->socket, p_dev->func, 439 CISTPL_FUNCID, &func_id)) { 440 p_dev->func_id = func_id.func; 441 p_dev->has_func_id = 1; 442 } else { 443 /* rule of thumb: cards with no FUNCID, but with 444 * common memory device geometry information, are 445 * probably memory cards (from pcmcia-cs) */ 446 cistpl_device_geo_t devgeo; 447 if (!pccard_read_tuple(p_dev->socket, p_dev->func, 448 CISTPL_DEVICE_GEO, &devgeo)) { 449 ds_dbg(0, "mem device geometry probably means " 450 "FUNCID_MEMORY\n"); 451 p_dev->func_id = CISTPL_FUNCID_MEMORY; 452 p_dev->has_func_id = 1; 453 } 454 } 455 456 if (!pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_VERS_1, 457 &vers1)) { 458 for (i=0; i < vers1.ns; i++) { 459 char *tmp; 460 unsigned int length; 461 462 tmp = vers1.str + vers1.ofs[i]; 463 464 length = strlen(tmp) + 1; 465 if ((length < 3) || (length > 255)) 466 continue; 467 468 p_dev->prod_id[i] = kmalloc(sizeof(char) * length, 469 GFP_KERNEL); 470 if (!p_dev->prod_id[i]) 471 continue; 472 473 p_dev->prod_id[i] = strncpy(p_dev->prod_id[i], 474 tmp, length); 475 } 476 } 477 478 return 0; 479 } 480 481 482 /* device_add_lock is needed to avoid double registration by cardmgr and kernel. 483 * Serializes pcmcia_device_add; will most likely be removed in future. 484 * 485 * While it has the caveat that adding new PCMCIA devices inside(!) device_register() 486 * won't work, this doesn't matter much at the moment: the driver core doesn't 487 * support it either. 488 */ 489 static DECLARE_MUTEX(device_add_lock); 490 491 struct pcmcia_device * pcmcia_device_add(struct pcmcia_socket *s, unsigned int function) 492 { 493 struct pcmcia_device *p_dev; 494 unsigned long flags; 495 496 s = pcmcia_get_socket(s); 497 if (!s) 498 return NULL; 499 500 down(&device_add_lock); 501 502 /* max of 2 devices per card */ 503 if (s->device_count == 2) 504 goto err_put; 505 506 p_dev = kmalloc(sizeof(struct pcmcia_device), GFP_KERNEL); 507 if (!p_dev) 508 goto err_put; 509 memset(p_dev, 0, sizeof(struct pcmcia_device)); 510 511 p_dev->socket = s; 512 p_dev->device_no = (s->device_count++); 513 p_dev->func = function; 514 515 p_dev->dev.bus = &pcmcia_bus_type; 516 p_dev->dev.parent = s->dev.dev; 517 p_dev->dev.release = pcmcia_release_dev; 518 sprintf (p_dev->dev.bus_id, "%d.%d", p_dev->socket->sock, p_dev->device_no); 519 520 /* compat */ 521 p_dev->state = CLIENT_UNBOUND; 522 523 /* Add to the list in pcmcia_bus_socket */ 524 spin_lock_irqsave(&pcmcia_dev_list_lock, flags); 525 list_add_tail(&p_dev->socket_device_list, &s->devices_list); 526 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags); 527 528 pcmcia_device_query(p_dev); 529 530 if (device_register(&p_dev->dev)) { 531 spin_lock_irqsave(&pcmcia_dev_list_lock, flags); 532 list_del(&p_dev->socket_device_list); 533 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags); 534 535 goto err_free; 536 } 537 538 up(&device_add_lock); 539 540 return p_dev; 541 542 err_free: 543 kfree(p_dev); 544 s->device_count--; 545 err_put: 546 up(&device_add_lock); 547 pcmcia_put_socket(s); 548 549 return NULL; 550 } 551 552 553 static int pcmcia_card_add(struct pcmcia_socket *s) 554 { 555 cisinfo_t cisinfo; 556 cistpl_longlink_mfc_t mfc; 557 unsigned int no_funcs, i; 558 int ret = 0; 559 560 if (!(s->resource_setup_done)) 561 return -EAGAIN; /* try again, but later... */ 562 563 pcmcia_validate_mem(s); 564 ret = pccard_validate_cis(s, BIND_FN_ALL, &cisinfo); 565 if (ret || !cisinfo.Chains) { 566 ds_dbg(0, "invalid CIS or invalid resources\n"); 567 return -ENODEV; 568 } 569 570 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc)) 571 no_funcs = mfc.nfn; 572 else 573 no_funcs = 1; 574 575 for (i=0; i < no_funcs; i++) 576 pcmcia_device_add(s, i); 577 578 return (ret); 579 } 580 581 582 static void pcmcia_delayed_add_pseudo_device(void *data) 583 { 584 struct pcmcia_socket *s = data; 585 pcmcia_device_add(s, 0); 586 s->pcmcia_state.device_add_pending = 0; 587 } 588 589 static inline void pcmcia_add_pseudo_device(struct pcmcia_socket *s) 590 { 591 if (!s->pcmcia_state.device_add_pending) { 592 schedule_work(&s->device_add); 593 s->pcmcia_state.device_add_pending = 1; 594 } 595 return; 596 } 597 598 static int pcmcia_requery(struct device *dev, void * _data) 599 { 600 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 601 if (!p_dev->dev.driver) 602 pcmcia_device_query(p_dev); 603 604 return 0; 605 } 606 607 static void pcmcia_bus_rescan(struct pcmcia_socket *skt) 608 { 609 int no_devices=0; 610 unsigned long flags; 611 612 /* must be called with skt_sem held */ 613 spin_lock_irqsave(&pcmcia_dev_list_lock, flags); 614 if (list_empty(&skt->devices_list)) 615 no_devices=1; 616 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags); 617 618 /* if no devices were added for this socket yet because of 619 * missing resource information or other trouble, we need to 620 * do this now. */ 621 if (no_devices) { 622 int ret = pcmcia_card_add(skt); 623 if (ret) 624 return; 625 } 626 627 /* some device information might have changed because of a CIS 628 * update or because we can finally read it correctly... so 629 * determine it again, overwriting old values if necessary. */ 630 bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery); 631 632 /* we re-scan all devices, not just the ones connected to this 633 * socket. This does not matter, though. */ 634 bus_rescan_devices(&pcmcia_bus_type); 635 } 636 637 static inline int pcmcia_devmatch(struct pcmcia_device *dev, 638 struct pcmcia_device_id *did) 639 { 640 if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) { 641 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id)) 642 return 0; 643 } 644 645 if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) { 646 if ((!dev->has_card_id) || (dev->card_id != did->card_id)) 647 return 0; 648 } 649 650 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) { 651 if (dev->func != did->function) 652 return 0; 653 } 654 655 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) { 656 if (!dev->prod_id[0]) 657 return 0; 658 if (strcmp(did->prod_id[0], dev->prod_id[0])) 659 return 0; 660 } 661 662 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) { 663 if (!dev->prod_id[1]) 664 return 0; 665 if (strcmp(did->prod_id[1], dev->prod_id[1])) 666 return 0; 667 } 668 669 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) { 670 if (!dev->prod_id[2]) 671 return 0; 672 if (strcmp(did->prod_id[2], dev->prod_id[2])) 673 return 0; 674 } 675 676 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) { 677 if (!dev->prod_id[3]) 678 return 0; 679 if (strcmp(did->prod_id[3], dev->prod_id[3])) 680 return 0; 681 } 682 683 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) { 684 /* handle pseudo multifunction devices: 685 * there are at most two pseudo multifunction devices. 686 * if we're matching against the first, schedule a 687 * call which will then check whether there are two 688 * pseudo devices, and if not, add the second one. 689 */ 690 if (dev->device_no == 0) 691 pcmcia_add_pseudo_device(dev->socket); 692 693 if (dev->device_no != did->device_no) 694 return 0; 695 } 696 697 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) { 698 if ((!dev->has_func_id) || (dev->func_id != did->func_id)) 699 return 0; 700 701 /* if this is a pseudo-multi-function device, 702 * we need explicit matches */ 703 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) 704 return 0; 705 if (dev->device_no) 706 return 0; 707 708 /* also, FUNC_ID matching needs to be activated by userspace 709 * after it has re-checked that there is no possible module 710 * with a prod_id/manf_id/card_id match. 711 */ 712 if (!dev->allow_func_id_match) 713 return 0; 714 } 715 716 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) { 717 if (!dev->socket->fake_cis) 718 pcmcia_load_firmware(dev, did->cisfile); 719 720 if (!dev->socket->fake_cis) 721 return 0; 722 } 723 724 if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) { 725 int i; 726 for (i=0; i<4; i++) 727 if (dev->prod_id[i]) 728 return 0; 729 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id) 730 return 0; 731 } 732 733 dev->dev.driver_data = (void *) did; 734 735 return 1; 736 } 737 738 739 static int pcmcia_bus_match(struct device * dev, struct device_driver * drv) { 740 struct pcmcia_device * p_dev = to_pcmcia_dev(dev); 741 struct pcmcia_driver * p_drv = to_pcmcia_drv(drv); 742 struct pcmcia_device_id *did = p_drv->id_table; 743 744 /* matching by cardmgr */ 745 if (p_dev->cardmgr == p_drv) 746 return 1; 747 748 while (did && did->match_flags) { 749 if (pcmcia_devmatch(p_dev, did)) 750 return 1; 751 did++; 752 } 753 754 return 0; 755 } 756 757 #ifdef CONFIG_HOTPLUG 758 759 static int pcmcia_bus_hotplug(struct device *dev, char **envp, int num_envp, 760 char *buffer, int buffer_size) 761 { 762 struct pcmcia_device *p_dev; 763 int i, length = 0; 764 u32 hash[4] = { 0, 0, 0, 0}; 765 766 if (!dev) 767 return -ENODEV; 768 769 p_dev = to_pcmcia_dev(dev); 770 771 /* calculate hashes */ 772 for (i=0; i<4; i++) { 773 if (!p_dev->prod_id[i]) 774 continue; 775 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i])); 776 } 777 778 i = 0; 779 780 if (add_hotplug_env_var(envp, num_envp, &i, 781 buffer, buffer_size, &length, 782 "SOCKET_NO=%u", 783 p_dev->socket->sock)) 784 return -ENOMEM; 785 786 if (add_hotplug_env_var(envp, num_envp, &i, 787 buffer, buffer_size, &length, 788 "DEVICE_NO=%02X", 789 p_dev->device_no)) 790 return -ENOMEM; 791 792 if (add_hotplug_env_var(envp, num_envp, &i, 793 buffer, buffer_size, &length, 794 "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X" 795 "pa%08Xpb%08Xpc%08Xpd%08X", 796 p_dev->has_manf_id ? p_dev->manf_id : 0, 797 p_dev->has_card_id ? p_dev->card_id : 0, 798 p_dev->has_func_id ? p_dev->func_id : 0, 799 p_dev->func, 800 p_dev->device_no, 801 hash[0], 802 hash[1], 803 hash[2], 804 hash[3])) 805 return -ENOMEM; 806 807 envp[i] = NULL; 808 809 return 0; 810 } 811 812 #else 813 814 static int pcmcia_bus_hotplug(struct device *dev, char **envp, int num_envp, 815 char *buffer, int buffer_size) 816 { 817 return -ENODEV; 818 } 819 820 #endif 821 822 /************************ per-device sysfs output ***************************/ 823 824 #define pcmcia_device_attr(field, test, format) \ 825 static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf) \ 826 { \ 827 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \ 828 return p_dev->test ? sprintf (buf, format, p_dev->field) : -ENODEV; \ 829 } 830 831 #define pcmcia_device_stringattr(name, field) \ 832 static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf) \ 833 { \ 834 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \ 835 return p_dev->field ? sprintf (buf, "%s\n", p_dev->field) : -ENODEV; \ 836 } 837 838 pcmcia_device_attr(func, socket, "0x%02x\n"); 839 pcmcia_device_attr(func_id, has_func_id, "0x%02x\n"); 840 pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n"); 841 pcmcia_device_attr(card_id, has_card_id, "0x%04x\n"); 842 pcmcia_device_stringattr(prod_id1, prod_id[0]); 843 pcmcia_device_stringattr(prod_id2, prod_id[1]); 844 pcmcia_device_stringattr(prod_id3, prod_id[2]); 845 pcmcia_device_stringattr(prod_id4, prod_id[3]); 846 847 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf) 848 { 849 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 850 int i; 851 u32 hash[4] = { 0, 0, 0, 0}; 852 853 /* calculate hashes */ 854 for (i=0; i<4; i++) { 855 if (!p_dev->prod_id[i]) 856 continue; 857 hash[i] = crc32(0,p_dev->prod_id[i],strlen(p_dev->prod_id[i])); 858 } 859 return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X" 860 "pa%08Xpb%08Xpc%08Xpd%08X\n", 861 p_dev->has_manf_id ? p_dev->manf_id : 0, 862 p_dev->has_card_id ? p_dev->card_id : 0, 863 p_dev->has_func_id ? p_dev->func_id : 0, 864 p_dev->func, p_dev->device_no, 865 hash[0], hash[1], hash[2], hash[3]); 866 } 867 868 static ssize_t pcmcia_store_allow_func_id_match(struct device *dev, 869 struct device_attribute *attr, const char *buf, size_t count) 870 { 871 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 872 if (!count) 873 return -EINVAL; 874 875 down(&p_dev->socket->skt_sem); 876 p_dev->allow_func_id_match = 1; 877 up(&p_dev->socket->skt_sem); 878 879 bus_rescan_devices(&pcmcia_bus_type); 880 881 return count; 882 } 883 884 static struct device_attribute pcmcia_dev_attrs[] = { 885 __ATTR(function, 0444, func_show, NULL), 886 __ATTR_RO(func_id), 887 __ATTR_RO(manf_id), 888 __ATTR_RO(card_id), 889 __ATTR_RO(prod_id1), 890 __ATTR_RO(prod_id2), 891 __ATTR_RO(prod_id3), 892 __ATTR_RO(prod_id4), 893 __ATTR_RO(modalias), 894 __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match), 895 __ATTR_NULL, 896 }; 897 898 899 /*====================================================================== 900 901 The card status event handler. 902 903 ======================================================================*/ 904 905 struct send_event_data { 906 struct pcmcia_socket *skt; 907 event_t event; 908 int priority; 909 }; 910 911 static int send_event_callback(struct device *dev, void * _data) 912 { 913 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 914 struct pcmcia_driver *p_drv; 915 struct send_event_data *data = _data; 916 917 /* we get called for all sockets, but may only pass the event 918 * for drivers _on the affected socket_ */ 919 if (p_dev->socket != data->skt) 920 return 0; 921 922 p_drv = to_pcmcia_drv(p_dev->dev.driver); 923 if (!p_drv) 924 return 0; 925 926 if (p_dev->state & (CLIENT_UNBOUND|CLIENT_STALE)) 927 return 0; 928 929 if (p_drv->event) 930 return p_drv->event(data->event, data->priority, 931 &p_dev->event_callback_args); 932 933 return 0; 934 } 935 936 static int send_event(struct pcmcia_socket *s, event_t event, int priority) 937 { 938 struct send_event_data private; 939 940 private.skt = s; 941 private.event = event; 942 private.priority = priority; 943 944 return bus_for_each_dev(&pcmcia_bus_type, NULL, &private, send_event_callback); 945 } /* send_event */ 946 947 948 /* Normally, the event is passed to individual drivers after 949 * informing userspace. Only for CS_EVENT_CARD_REMOVAL this 950 * is inversed to maintain historic compatibility. 951 */ 952 953 static int ds_event(struct pcmcia_socket *skt, event_t event, int priority) 954 { 955 struct pcmcia_socket *s = pcmcia_get_socket(skt); 956 int ret = 0; 957 958 ds_dbg(1, "ds_event(0x%06x, %d, 0x%p)\n", 959 event, priority, skt); 960 961 switch (event) { 962 963 case CS_EVENT_CARD_REMOVAL: 964 s->pcmcia_state.present = 0; 965 send_event(skt, event, priority); 966 unbind_request(skt); 967 handle_event(skt, event); 968 break; 969 970 case CS_EVENT_CARD_INSERTION: 971 s->pcmcia_state.present = 1; 972 pcmcia_card_add(skt); 973 handle_event(skt, event); 974 break; 975 976 case CS_EVENT_EJECTION_REQUEST: 977 ret = send_event(skt, event, priority); 978 break; 979 980 default: 981 handle_event(skt, event); 982 send_event(skt, event, priority); 983 break; 984 } 985 986 pcmcia_put_socket(s); 987 988 return 0; 989 } /* ds_event */ 990 991 992 993 int pcmcia_register_client(struct pcmcia_device **handle, client_reg_t *req) 994 { 995 struct pcmcia_socket *s = NULL; 996 struct pcmcia_device *p_dev = NULL; 997 struct pcmcia_driver *p_drv = NULL; 998 999 /* Look for unbound client with matching dev_info */ 1000 down_read(&pcmcia_socket_list_rwsem); 1001 list_for_each_entry(s, &pcmcia_socket_list, socket_list) { 1002 unsigned long flags; 1003 1004 if (s->state & SOCKET_CARDBUS) 1005 continue; 1006 1007 s = pcmcia_get_socket(s); 1008 if (!s) 1009 continue; 1010 spin_lock_irqsave(&pcmcia_dev_list_lock, flags); 1011 list_for_each_entry(p_dev, &s->devices_list, socket_device_list) { 1012 p_dev = pcmcia_get_dev(p_dev); 1013 if (!p_dev) 1014 continue; 1015 if (!(p_dev->state & CLIENT_UNBOUND) || 1016 (!p_dev->dev.driver)) { 1017 pcmcia_put_dev(p_dev); 1018 continue; 1019 } 1020 p_drv = to_pcmcia_drv(p_dev->dev.driver); 1021 if (!strncmp(p_drv->drv.name, (char *)req->dev_info, DEV_NAME_LEN)) { 1022 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags); 1023 goto found; 1024 } 1025 pcmcia_put_dev(p_dev); 1026 } 1027 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags); 1028 pcmcia_put_socket(s); 1029 } 1030 found: 1031 up_read(&pcmcia_socket_list_rwsem); 1032 if (!p_dev) 1033 return -ENODEV; 1034 1035 pcmcia_put_socket(s); /* safe, as we already hold a reference from bind_device */ 1036 1037 *handle = p_dev; 1038 p_dev->state &= ~CLIENT_UNBOUND; 1039 p_dev->event_callback_args = req->event_callback_args; 1040 p_dev->event_callback_args.client_handle = p_dev; 1041 1042 1043 if (!s->functions) { 1044 cistpl_longlink_mfc_t mfc; 1045 if (pccard_read_tuple(s, p_dev->func, CISTPL_LONGLINK_MFC, &mfc) 1046 == CS_SUCCESS) 1047 s->functions = mfc.nfn; 1048 else 1049 s->functions = 1; 1050 s->config = kmalloc(sizeof(config_t) * s->functions, 1051 GFP_KERNEL); 1052 if (!s->config) 1053 goto out_no_resource; 1054 memset(s->config, 0, sizeof(config_t) * s->functions); 1055 } 1056 1057 ds_dbg(1, "register_client(): client 0x%p, dev %s\n", 1058 p_dev, p_dev->dev.bus_id); 1059 1060 if ((s->state & (SOCKET_PRESENT|SOCKET_CARDBUS)) == SOCKET_PRESENT) { 1061 if (p_drv->event) 1062 p_drv->event(CS_EVENT_CARD_INSERTION, CS_EVENT_PRI_LOW, 1063 &p_dev->event_callback_args); 1064 1065 } 1066 1067 return CS_SUCCESS; 1068 1069 out_no_resource: 1070 pcmcia_put_dev(p_dev); 1071 return CS_OUT_OF_RESOURCE; 1072 } /* register_client */ 1073 EXPORT_SYMBOL(pcmcia_register_client); 1074 1075 1076 /* unbind _all_ devices attached to a given pcmcia_bus_socket. The 1077 * drivers have been called with EVENT_CARD_REMOVAL before. 1078 */ 1079 static int unbind_request(struct pcmcia_socket *s) 1080 { 1081 struct pcmcia_device *p_dev; 1082 unsigned long flags; 1083 1084 ds_dbg(2, "unbind_request(%d)\n", s->sock); 1085 1086 s->device_count = 0; 1087 1088 for (;;) { 1089 /* unregister all pcmcia_devices registered with this socket*/ 1090 spin_lock_irqsave(&pcmcia_dev_list_lock, flags); 1091 if (list_empty(&s->devices_list)) { 1092 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags); 1093 return 0; 1094 } 1095 p_dev = list_entry((&s->devices_list)->next, struct pcmcia_device, socket_device_list); 1096 list_del(&p_dev->socket_device_list); 1097 p_dev->state |= CLIENT_STALE; 1098 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags); 1099 1100 device_unregister(&p_dev->dev); 1101 } 1102 1103 return 0; 1104 } /* unbind_request */ 1105 1106 int pcmcia_deregister_client(struct pcmcia_device *p_dev) 1107 { 1108 struct pcmcia_socket *s; 1109 int i; 1110 1111 s = p_dev->socket; 1112 ds_dbg(1, "deregister_client(%p)\n", p_dev); 1113 1114 if (p_dev->state & (CLIENT_IRQ_REQ|CLIENT_IO_REQ|CLIENT_CONFIG_LOCKED)) 1115 goto warn_out; 1116 for (i = 0; i < MAX_WIN; i++) 1117 if (p_dev->state & CLIENT_WIN_REQ(i)) 1118 goto warn_out; 1119 1120 if (p_dev->state & CLIENT_STALE) { 1121 p_dev->state &= ~CLIENT_STALE; 1122 pcmcia_put_dev(p_dev); 1123 } else { 1124 p_dev->state = CLIENT_UNBOUND; 1125 } 1126 1127 return CS_SUCCESS; 1128 warn_out: 1129 printk(KERN_WARNING "ds: deregister_client was called too early.\n"); 1130 return CS_IN_USE; 1131 } /* deregister_client */ 1132 EXPORT_SYMBOL(pcmcia_deregister_client); 1133 1134 static struct pcmcia_callback pcmcia_bus_callback = { 1135 .owner = THIS_MODULE, 1136 .event = ds_event, 1137 .requery = pcmcia_bus_rescan, 1138 }; 1139 1140 static int __devinit pcmcia_bus_add_socket(struct class_device *class_dev) 1141 { 1142 struct pcmcia_socket *socket = class_get_devdata(class_dev); 1143 int ret; 1144 1145 socket = pcmcia_get_socket(socket); 1146 if (!socket) { 1147 printk(KERN_ERR "PCMCIA obtaining reference to socket %p failed\n", socket); 1148 return -ENODEV; 1149 } 1150 1151 /* 1152 * Ugly. But we want to wait for the socket threads to have started up. 1153 * We really should let the drivers themselves drive some of this.. 1154 */ 1155 msleep(250); 1156 1157 #ifdef CONFIG_PCMCIA_IOCTL 1158 init_waitqueue_head(&socket->queue); 1159 #endif 1160 INIT_LIST_HEAD(&socket->devices_list); 1161 INIT_WORK(&socket->device_add, pcmcia_delayed_add_pseudo_device, socket); 1162 memset(&socket->pcmcia_state, 0, sizeof(u8)); 1163 socket->device_count = 0; 1164 1165 ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback); 1166 if (ret) { 1167 printk(KERN_ERR "PCMCIA registration PCCard core failed for socket %p\n", socket); 1168 pcmcia_put_socket(socket); 1169 return (ret); 1170 } 1171 1172 return 0; 1173 } 1174 1175 static void pcmcia_bus_remove_socket(struct class_device *class_dev) 1176 { 1177 struct pcmcia_socket *socket = class_get_devdata(class_dev); 1178 1179 if (!socket) 1180 return; 1181 1182 socket->pcmcia_state.dead = 1; 1183 pccard_register_pcmcia(socket, NULL); 1184 1185 pcmcia_put_socket(socket); 1186 1187 return; 1188 } 1189 1190 1191 /* the pcmcia_bus_interface is used to handle pcmcia socket devices */ 1192 static struct class_interface pcmcia_bus_interface = { 1193 .class = &pcmcia_socket_class, 1194 .add = &pcmcia_bus_add_socket, 1195 .remove = &pcmcia_bus_remove_socket, 1196 }; 1197 1198 1199 struct bus_type pcmcia_bus_type = { 1200 .name = "pcmcia", 1201 .hotplug = pcmcia_bus_hotplug, 1202 .match = pcmcia_bus_match, 1203 .dev_attrs = pcmcia_dev_attrs, 1204 }; 1205 1206 1207 static int __init init_pcmcia_bus(void) 1208 { 1209 spin_lock_init(&pcmcia_dev_list_lock); 1210 1211 bus_register(&pcmcia_bus_type); 1212 class_interface_register(&pcmcia_bus_interface); 1213 1214 pcmcia_setup_ioctl(); 1215 1216 return 0; 1217 } 1218 fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that 1219 * pcmcia_socket_class is already registered */ 1220 1221 1222 static void __exit exit_pcmcia_bus(void) 1223 { 1224 pcmcia_cleanup_ioctl(); 1225 1226 class_interface_unregister(&pcmcia_bus_interface); 1227 1228 bus_unregister(&pcmcia_bus_type); 1229 } 1230 module_exit(exit_pcmcia_bus); 1231 1232 1233 MODULE_ALIAS("ds"); 1234