1 /* 2 * ds.c -- 16-bit PCMCIA core support 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License version 2 as 6 * published by the Free Software Foundation. 7 * 8 * The initial developer of the original code is David A. Hinds 9 * <dahinds@users.sourceforge.net>. Portions created by David A. Hinds 10 * are Copyright (C) 1999 David A. Hinds. All Rights Reserved. 11 * 12 * (C) 1999 David A. Hinds 13 * (C) 2003 - 2006 Dominik Brodowski 14 */ 15 16 #include <linux/kernel.h> 17 #include <linux/module.h> 18 #include <linux/init.h> 19 #include <linux/errno.h> 20 #include <linux/list.h> 21 #include <linux/delay.h> 22 #include <linux/workqueue.h> 23 #include <linux/crc32.h> 24 #include <linux/firmware.h> 25 #include <linux/kref.h> 26 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 /*====================================================================*/ 61 62 /* code which was in cs.c before */ 63 64 /* String tables for error messages */ 65 66 typedef struct lookup_t { 67 int key; 68 char *msg; 69 } lookup_t; 70 71 static const lookup_t error_table[] = { 72 { CS_SUCCESS, "Operation succeeded" }, 73 { CS_BAD_ADAPTER, "Bad adapter" }, 74 { CS_BAD_ATTRIBUTE, "Bad attribute", }, 75 { CS_BAD_BASE, "Bad base address" }, 76 { CS_BAD_EDC, "Bad EDC" }, 77 { CS_BAD_IRQ, "Bad IRQ" }, 78 { CS_BAD_OFFSET, "Bad offset" }, 79 { CS_BAD_PAGE, "Bad page number" }, 80 { CS_READ_FAILURE, "Read failure" }, 81 { CS_BAD_SIZE, "Bad size" }, 82 { CS_BAD_SOCKET, "Bad socket" }, 83 { CS_BAD_TYPE, "Bad type" }, 84 { CS_BAD_VCC, "Bad Vcc" }, 85 { CS_BAD_VPP, "Bad Vpp" }, 86 { CS_BAD_WINDOW, "Bad window" }, 87 { CS_WRITE_FAILURE, "Write failure" }, 88 { CS_NO_CARD, "No card present" }, 89 { CS_UNSUPPORTED_FUNCTION, "Usupported function" }, 90 { CS_UNSUPPORTED_MODE, "Unsupported mode" }, 91 { CS_BAD_SPEED, "Bad speed" }, 92 { CS_BUSY, "Resource busy" }, 93 { CS_GENERAL_FAILURE, "General failure" }, 94 { CS_WRITE_PROTECTED, "Write protected" }, 95 { CS_BAD_ARG_LENGTH, "Bad argument length" }, 96 { CS_BAD_ARGS, "Bad arguments" }, 97 { CS_CONFIGURATION_LOCKED, "Configuration locked" }, 98 { CS_IN_USE, "Resource in use" }, 99 { CS_NO_MORE_ITEMS, "No more items" }, 100 { CS_OUT_OF_RESOURCE, "Out of resource" }, 101 { CS_BAD_HANDLE, "Bad handle" }, 102 { CS_BAD_TUPLE, "Bad CIS tuple" } 103 }; 104 105 106 static const lookup_t service_table[] = { 107 { AccessConfigurationRegister, "AccessConfigurationRegister" }, 108 { AddSocketServices, "AddSocketServices" }, 109 { AdjustResourceInfo, "AdjustResourceInfo" }, 110 { CheckEraseQueue, "CheckEraseQueue" }, 111 { CloseMemory, "CloseMemory" }, 112 { DeregisterClient, "DeregisterClient" }, 113 { DeregisterEraseQueue, "DeregisterEraseQueue" }, 114 { GetCardServicesInfo, "GetCardServicesInfo" }, 115 { GetClientInfo, "GetClientInfo" }, 116 { GetConfigurationInfo, "GetConfigurationInfo" }, 117 { GetEventMask, "GetEventMask" }, 118 { GetFirstClient, "GetFirstClient" }, 119 { GetFirstRegion, "GetFirstRegion" }, 120 { GetFirstTuple, "GetFirstTuple" }, 121 { GetNextClient, "GetNextClient" }, 122 { GetNextRegion, "GetNextRegion" }, 123 { GetNextTuple, "GetNextTuple" }, 124 { GetStatus, "GetStatus" }, 125 { GetTupleData, "GetTupleData" }, 126 { MapMemPage, "MapMemPage" }, 127 { ModifyConfiguration, "ModifyConfiguration" }, 128 { ModifyWindow, "ModifyWindow" }, 129 { OpenMemory, "OpenMemory" }, 130 { ParseTuple, "ParseTuple" }, 131 { ReadMemory, "ReadMemory" }, 132 { RegisterClient, "RegisterClient" }, 133 { RegisterEraseQueue, "RegisterEraseQueue" }, 134 { RegisterMTD, "RegisterMTD" }, 135 { ReleaseConfiguration, "ReleaseConfiguration" }, 136 { ReleaseIO, "ReleaseIO" }, 137 { ReleaseIRQ, "ReleaseIRQ" }, 138 { ReleaseWindow, "ReleaseWindow" }, 139 { RequestConfiguration, "RequestConfiguration" }, 140 { RequestIO, "RequestIO" }, 141 { RequestIRQ, "RequestIRQ" }, 142 { RequestSocketMask, "RequestSocketMask" }, 143 { RequestWindow, "RequestWindow" }, 144 { ResetCard, "ResetCard" }, 145 { SetEventMask, "SetEventMask" }, 146 { ValidateCIS, "ValidateCIS" }, 147 { WriteMemory, "WriteMemory" }, 148 { BindDevice, "BindDevice" }, 149 { BindMTD, "BindMTD" }, 150 { ReportError, "ReportError" }, 151 { SuspendCard, "SuspendCard" }, 152 { ResumeCard, "ResumeCard" }, 153 { EjectCard, "EjectCard" }, 154 { InsertCard, "InsertCard" }, 155 { ReplaceCIS, "ReplaceCIS" } 156 }; 157 158 159 static int pcmcia_report_error(struct pcmcia_device *p_dev, error_info_t *err) 160 { 161 int i; 162 char *serv; 163 164 if (!p_dev) 165 printk(KERN_NOTICE); 166 else 167 printk(KERN_NOTICE "%s: ", p_dev->dev.bus_id); 168 169 for (i = 0; i < ARRAY_SIZE(service_table); i++) 170 if (service_table[i].key == err->func) 171 break; 172 if (i < ARRAY_SIZE(service_table)) 173 serv = service_table[i].msg; 174 else 175 serv = "Unknown service number"; 176 177 for (i = 0; i < ARRAY_SIZE(error_table); i++) 178 if (error_table[i].key == err->retcode) 179 break; 180 if (i < ARRAY_SIZE(error_table)) 181 printk("%s: %s\n", serv, error_table[i].msg); 182 else 183 printk("%s: Unknown error code %#x\n", serv, err->retcode); 184 185 return CS_SUCCESS; 186 } /* report_error */ 187 188 /* end of code which was in cs.c before */ 189 190 /*======================================================================*/ 191 192 void cs_error(struct pcmcia_device *p_dev, int func, int ret) 193 { 194 error_info_t err = { func, ret }; 195 pcmcia_report_error(p_dev, &err); 196 } 197 EXPORT_SYMBOL(cs_error); 198 199 200 static void pcmcia_check_driver(struct pcmcia_driver *p_drv) 201 { 202 struct pcmcia_device_id *did = p_drv->id_table; 203 unsigned int i; 204 u32 hash; 205 206 if (!p_drv->probe || !p_drv->remove) 207 printk(KERN_DEBUG "pcmcia: %s lacks a requisite callback " 208 "function\n", p_drv->drv.name); 209 210 while (did && did->match_flags) { 211 for (i=0; i<4; i++) { 212 if (!did->prod_id[i]) 213 continue; 214 215 hash = crc32(0, did->prod_id[i], strlen(did->prod_id[i])); 216 if (hash == did->prod_id_hash[i]) 217 continue; 218 219 printk(KERN_DEBUG "pcmcia: %s: invalid hash for " 220 "product string \"%s\": is 0x%x, should " 221 "be 0x%x\n", p_drv->drv.name, did->prod_id[i], 222 did->prod_id_hash[i], hash); 223 printk(KERN_DEBUG "pcmcia: see " 224 "Documentation/pcmcia/devicetable.txt for " 225 "details\n"); 226 } 227 did++; 228 } 229 230 return; 231 } 232 233 234 #ifdef CONFIG_PCMCIA_LOAD_CIS 235 236 /** 237 * pcmcia_load_firmware - load CIS from userspace if device-provided is broken 238 * @dev - the pcmcia device which needs a CIS override 239 * @filename - requested filename in /lib/firmware/ 240 * 241 * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if 242 * the one provided by the card is broken. The firmware files reside in 243 * /lib/firmware/ in userspace. 244 */ 245 static int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename) 246 { 247 struct pcmcia_socket *s = dev->socket; 248 const struct firmware *fw; 249 char path[20]; 250 int ret=-ENOMEM; 251 cisdump_t *cis; 252 253 if (!filename) 254 return -EINVAL; 255 256 ds_dbg(1, "trying to load firmware %s\n", filename); 257 258 if (strlen(filename) > 14) 259 return -EINVAL; 260 261 snprintf(path, 20, "%s", filename); 262 263 if (request_firmware(&fw, path, &dev->dev) == 0) { 264 if (fw->size >= CISTPL_MAX_CIS_SIZE) 265 goto release; 266 267 cis = kzalloc(sizeof(cisdump_t), GFP_KERNEL); 268 if (!cis) 269 goto release; 270 271 cis->Length = fw->size + 1; 272 memcpy(cis->Data, fw->data, fw->size); 273 274 if (!pcmcia_replace_cis(s, cis)) 275 ret = 0; 276 } 277 release: 278 release_firmware(fw); 279 280 return (ret); 281 } 282 283 #else /* !CONFIG_PCMCIA_LOAD_CIS */ 284 285 static inline int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename) 286 { 287 return -ENODEV; 288 } 289 290 #endif 291 292 293 /*======================================================================*/ 294 295 296 /** 297 * pcmcia_register_driver - register a PCMCIA driver with the bus core 298 * 299 * Registers a PCMCIA driver with the PCMCIA bus core. 300 */ 301 int pcmcia_register_driver(struct pcmcia_driver *driver) 302 { 303 if (!driver) 304 return -EINVAL; 305 306 pcmcia_check_driver(driver); 307 308 /* initialize common fields */ 309 driver->drv.bus = &pcmcia_bus_type; 310 driver->drv.owner = driver->owner; 311 312 return driver_register(&driver->drv); 313 } 314 EXPORT_SYMBOL(pcmcia_register_driver); 315 316 /** 317 * pcmcia_unregister_driver - unregister a PCMCIA driver with the bus core 318 */ 319 void pcmcia_unregister_driver(struct pcmcia_driver *driver) 320 { 321 driver_unregister(&driver->drv); 322 } 323 EXPORT_SYMBOL(pcmcia_unregister_driver); 324 325 326 /* pcmcia_device handling */ 327 328 struct pcmcia_device * pcmcia_get_dev(struct pcmcia_device *p_dev) 329 { 330 struct device *tmp_dev; 331 tmp_dev = get_device(&p_dev->dev); 332 if (!tmp_dev) 333 return NULL; 334 return to_pcmcia_dev(tmp_dev); 335 } 336 337 void pcmcia_put_dev(struct pcmcia_device *p_dev) 338 { 339 if (p_dev) 340 put_device(&p_dev->dev); 341 } 342 343 static void pcmcia_release_function(struct kref *ref) 344 { 345 struct config_t *c = container_of(ref, struct config_t, ref); 346 kfree(c); 347 } 348 349 static void pcmcia_release_dev(struct device *dev) 350 { 351 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 352 ds_dbg(1, "releasing dev %p\n", p_dev); 353 pcmcia_put_socket(p_dev->socket); 354 kfree(p_dev->devname); 355 kref_put(&p_dev->function_config->ref, pcmcia_release_function); 356 kfree(p_dev); 357 } 358 359 static void pcmcia_add_pseudo_device(struct pcmcia_socket *s) 360 { 361 if (!s->pcmcia_state.device_add_pending) { 362 s->pcmcia_state.device_add_pending = 1; 363 schedule_work(&s->device_add); 364 } 365 return; 366 } 367 368 static int pcmcia_device_probe(struct device * dev) 369 { 370 struct pcmcia_device *p_dev; 371 struct pcmcia_driver *p_drv; 372 struct pcmcia_device_id *did; 373 struct pcmcia_socket *s; 374 int ret = 0; 375 376 dev = get_device(dev); 377 if (!dev) 378 return -ENODEV; 379 380 p_dev = to_pcmcia_dev(dev); 381 p_drv = to_pcmcia_drv(dev->driver); 382 s = p_dev->socket; 383 384 if ((!p_drv->probe) || (!p_dev->function_config) || 385 (!try_module_get(p_drv->owner))) { 386 ret = -EINVAL; 387 goto put_dev; 388 } 389 390 ret = p_drv->probe(p_dev); 391 if (ret) 392 goto put_module; 393 394 /* handle pseudo multifunction devices: 395 * there are at most two pseudo multifunction devices. 396 * if we're matching against the first, schedule a 397 * call which will then check whether there are two 398 * pseudo devices, and if not, add the second one. 399 */ 400 did = p_dev->dev.driver_data; 401 if (did && (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) && 402 (p_dev->socket->device_count == 1) && (p_dev->device_no == 0)) 403 pcmcia_add_pseudo_device(p_dev->socket); 404 405 put_module: 406 if (ret) 407 module_put(p_drv->owner); 408 put_dev: 409 if (ret) 410 put_device(dev); 411 return (ret); 412 } 413 414 415 /* 416 * Removes a PCMCIA card from the device tree and socket list. 417 */ 418 static void pcmcia_card_remove(struct pcmcia_socket *s, struct pcmcia_device *leftover) 419 { 420 struct pcmcia_device *p_dev; 421 struct pcmcia_device *tmp; 422 unsigned long flags; 423 424 ds_dbg(2, "unbind_request(%d)\n", s->sock); 425 426 427 if (!leftover) 428 s->device_count = 0; 429 else 430 s->device_count = 1; 431 432 /* unregister all pcmcia_devices registered with this socket, except leftover */ 433 list_for_each_entry_safe(p_dev, tmp, &s->devices_list, socket_device_list) { 434 if (p_dev == leftover) 435 continue; 436 437 spin_lock_irqsave(&pcmcia_dev_list_lock, flags); 438 list_del(&p_dev->socket_device_list); 439 p_dev->_removed=1; 440 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags); 441 442 device_unregister(&p_dev->dev); 443 } 444 445 return; 446 } 447 448 static int pcmcia_device_remove(struct device * dev) 449 { 450 struct pcmcia_device *p_dev; 451 struct pcmcia_driver *p_drv; 452 struct pcmcia_device_id *did; 453 int i; 454 455 p_dev = to_pcmcia_dev(dev); 456 p_drv = to_pcmcia_drv(dev->driver); 457 458 /* If we're removing the primary module driving a 459 * pseudo multi-function card, we need to unbind 460 * all devices 461 */ 462 did = p_dev->dev.driver_data; 463 if (did && (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) && 464 (p_dev->socket->device_count != 0) && 465 (p_dev->device_no == 0)) 466 pcmcia_card_remove(p_dev->socket, p_dev); 467 468 /* detach the "instance" */ 469 if (!p_drv) 470 return 0; 471 472 if (p_drv->remove) 473 p_drv->remove(p_dev); 474 475 p_dev->dev_node = NULL; 476 477 /* check for proper unloading */ 478 if (p_dev->_irq || p_dev->_io || p_dev->_locked) 479 printk(KERN_INFO "pcmcia: driver %s did not release config properly\n", 480 p_drv->drv.name); 481 482 for (i = 0; i < MAX_WIN; i++) 483 if (p_dev->_win & CLIENT_WIN_REQ(i)) 484 printk(KERN_INFO "pcmcia: driver %s did not release windows properly\n", 485 p_drv->drv.name); 486 487 /* references from pcmcia_probe_device */ 488 pcmcia_put_dev(p_dev); 489 module_put(p_drv->owner); 490 491 return 0; 492 } 493 494 495 /* 496 * pcmcia_device_query -- determine information about a pcmcia device 497 */ 498 static int pcmcia_device_query(struct pcmcia_device *p_dev) 499 { 500 cistpl_manfid_t manf_id; 501 cistpl_funcid_t func_id; 502 cistpl_vers_1_t *vers1; 503 unsigned int i; 504 505 vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL); 506 if (!vers1) 507 return -ENOMEM; 508 509 if (!pccard_read_tuple(p_dev->socket, p_dev->func, 510 CISTPL_MANFID, &manf_id)) { 511 p_dev->manf_id = manf_id.manf; 512 p_dev->card_id = manf_id.card; 513 p_dev->has_manf_id = 1; 514 p_dev->has_card_id = 1; 515 } 516 517 if (!pccard_read_tuple(p_dev->socket, p_dev->func, 518 CISTPL_FUNCID, &func_id)) { 519 p_dev->func_id = func_id.func; 520 p_dev->has_func_id = 1; 521 } else { 522 /* rule of thumb: cards with no FUNCID, but with 523 * common memory device geometry information, are 524 * probably memory cards (from pcmcia-cs) */ 525 cistpl_device_geo_t *devgeo; 526 527 devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL); 528 if (!devgeo) { 529 kfree(vers1); 530 return -ENOMEM; 531 } 532 if (!pccard_read_tuple(p_dev->socket, p_dev->func, 533 CISTPL_DEVICE_GEO, devgeo)) { 534 ds_dbg(0, "mem device geometry probably means " 535 "FUNCID_MEMORY\n"); 536 p_dev->func_id = CISTPL_FUNCID_MEMORY; 537 p_dev->has_func_id = 1; 538 } 539 kfree(devgeo); 540 } 541 542 if (!pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_VERS_1, 543 vers1)) { 544 for (i=0; i < vers1->ns; i++) { 545 char *tmp; 546 unsigned int length; 547 548 tmp = vers1->str + vers1->ofs[i]; 549 550 length = strlen(tmp) + 1; 551 if ((length < 2) || (length > 255)) 552 continue; 553 554 p_dev->prod_id[i] = kmalloc(sizeof(char) * length, 555 GFP_KERNEL); 556 if (!p_dev->prod_id[i]) 557 continue; 558 559 p_dev->prod_id[i] = strncpy(p_dev->prod_id[i], 560 tmp, length); 561 } 562 } 563 564 kfree(vers1); 565 return 0; 566 } 567 568 569 /* device_add_lock is needed to avoid double registration by cardmgr and kernel. 570 * Serializes pcmcia_device_add; will most likely be removed in future. 571 * 572 * While it has the caveat that adding new PCMCIA devices inside(!) device_register() 573 * won't work, this doesn't matter much at the moment: the driver core doesn't 574 * support it either. 575 */ 576 static DEFINE_MUTEX(device_add_lock); 577 578 struct pcmcia_device * pcmcia_device_add(struct pcmcia_socket *s, unsigned int function) 579 { 580 struct pcmcia_device *p_dev, *tmp_dev; 581 unsigned long flags; 582 int bus_id_len; 583 584 s = pcmcia_get_socket(s); 585 if (!s) 586 return NULL; 587 588 mutex_lock(&device_add_lock); 589 590 /* max of 2 devices per card */ 591 if (s->device_count == 2) 592 goto err_put; 593 594 p_dev = kzalloc(sizeof(struct pcmcia_device), GFP_KERNEL); 595 if (!p_dev) 596 goto err_put; 597 598 p_dev->socket = s; 599 p_dev->device_no = (s->device_count++); 600 p_dev->func = function; 601 if (s->functions <= function) 602 s->functions = function + 1; 603 604 p_dev->dev.bus = &pcmcia_bus_type; 605 p_dev->dev.parent = s->dev.dev; 606 p_dev->dev.release = pcmcia_release_dev; 607 bus_id_len = sprintf (p_dev->dev.bus_id, "%d.%d", p_dev->socket->sock, p_dev->device_no); 608 609 p_dev->devname = kmalloc(6 + bus_id_len + 1, GFP_KERNEL); 610 if (!p_dev->devname) 611 goto err_free; 612 sprintf (p_dev->devname, "pcmcia%s", p_dev->dev.bus_id); 613 614 /* compat */ 615 spin_lock_irqsave(&pcmcia_dev_list_lock, flags); 616 617 /* 618 * p_dev->function_config must be the same for all card functions. 619 * Note that this is serialized by the device_add_lock, so that 620 * only one such struct will be created. 621 */ 622 list_for_each_entry(tmp_dev, &s->devices_list, socket_device_list) 623 if (p_dev->func == tmp_dev->func) { 624 p_dev->function_config = tmp_dev->function_config; 625 kref_get(&p_dev->function_config->ref); 626 } 627 628 /* Add to the list in pcmcia_bus_socket */ 629 list_add(&p_dev->socket_device_list, &s->devices_list); 630 631 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags); 632 633 if (!p_dev->function_config) { 634 p_dev->function_config = kzalloc(sizeof(struct config_t), 635 GFP_KERNEL); 636 if (!p_dev->function_config) 637 goto err_unreg; 638 kref_init(&p_dev->function_config->ref); 639 } 640 641 printk(KERN_NOTICE "pcmcia: registering new device %s\n", 642 p_dev->devname); 643 644 pcmcia_device_query(p_dev); 645 646 if (device_register(&p_dev->dev)) 647 goto err_unreg; 648 649 mutex_unlock(&device_add_lock); 650 651 return p_dev; 652 653 err_unreg: 654 spin_lock_irqsave(&pcmcia_dev_list_lock, flags); 655 list_del(&p_dev->socket_device_list); 656 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags); 657 658 err_free: 659 kfree(p_dev->devname); 660 kfree(p_dev); 661 s->device_count--; 662 err_put: 663 mutex_unlock(&device_add_lock); 664 pcmcia_put_socket(s); 665 666 return NULL; 667 } 668 669 670 static int pcmcia_card_add(struct pcmcia_socket *s) 671 { 672 cisinfo_t cisinfo; 673 cistpl_longlink_mfc_t mfc; 674 unsigned int no_funcs, i; 675 int ret = 0; 676 677 if (!(s->resource_setup_done)) 678 return -EAGAIN; /* try again, but later... */ 679 680 if (pcmcia_validate_mem(s)) 681 return -EAGAIN; /* try again, but later... */ 682 683 ret = pccard_validate_cis(s, BIND_FN_ALL, &cisinfo); 684 if (ret || !cisinfo.Chains) { 685 ds_dbg(0, "invalid CIS or invalid resources\n"); 686 return -ENODEV; 687 } 688 689 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc)) 690 no_funcs = mfc.nfn; 691 else 692 no_funcs = 1; 693 694 for (i=0; i < no_funcs; i++) 695 pcmcia_device_add(s, i); 696 697 return (ret); 698 } 699 700 701 static void pcmcia_delayed_add_pseudo_device(void *data) 702 { 703 struct pcmcia_socket *s = data; 704 pcmcia_device_add(s, 0); 705 s->pcmcia_state.device_add_pending = 0; 706 } 707 708 static int pcmcia_requery(struct device *dev, void * _data) 709 { 710 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 711 if (!p_dev->dev.driver) 712 pcmcia_device_query(p_dev); 713 714 return 0; 715 } 716 717 static void pcmcia_bus_rescan(struct pcmcia_socket *skt) 718 { 719 int no_devices=0; 720 unsigned long flags; 721 722 /* must be called with skt_mutex held */ 723 spin_lock_irqsave(&pcmcia_dev_list_lock, flags); 724 if (list_empty(&skt->devices_list)) 725 no_devices=1; 726 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags); 727 728 /* if no devices were added for this socket yet because of 729 * missing resource information or other trouble, we need to 730 * do this now. */ 731 if (no_devices) { 732 int ret = pcmcia_card_add(skt); 733 if (ret) 734 return; 735 } 736 737 /* some device information might have changed because of a CIS 738 * update or because we can finally read it correctly... so 739 * determine it again, overwriting old values if necessary. */ 740 bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery); 741 742 /* we re-scan all devices, not just the ones connected to this 743 * socket. This does not matter, though. */ 744 bus_rescan_devices(&pcmcia_bus_type); 745 } 746 747 static inline int pcmcia_devmatch(struct pcmcia_device *dev, 748 struct pcmcia_device_id *did) 749 { 750 if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) { 751 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id)) 752 return 0; 753 } 754 755 if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) { 756 if ((!dev->has_card_id) || (dev->card_id != did->card_id)) 757 return 0; 758 } 759 760 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) { 761 if (dev->func != did->function) 762 return 0; 763 } 764 765 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) { 766 if (!dev->prod_id[0]) 767 return 0; 768 if (strcmp(did->prod_id[0], dev->prod_id[0])) 769 return 0; 770 } 771 772 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) { 773 if (!dev->prod_id[1]) 774 return 0; 775 if (strcmp(did->prod_id[1], dev->prod_id[1])) 776 return 0; 777 } 778 779 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) { 780 if (!dev->prod_id[2]) 781 return 0; 782 if (strcmp(did->prod_id[2], dev->prod_id[2])) 783 return 0; 784 } 785 786 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) { 787 if (!dev->prod_id[3]) 788 return 0; 789 if (strcmp(did->prod_id[3], dev->prod_id[3])) 790 return 0; 791 } 792 793 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) { 794 if (dev->device_no != did->device_no) 795 return 0; 796 } 797 798 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) { 799 if ((!dev->has_func_id) || (dev->func_id != did->func_id)) 800 return 0; 801 802 /* if this is a pseudo-multi-function device, 803 * we need explicit matches */ 804 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) 805 return 0; 806 if (dev->device_no) 807 return 0; 808 809 /* also, FUNC_ID matching needs to be activated by userspace 810 * after it has re-checked that there is no possible module 811 * with a prod_id/manf_id/card_id match. 812 */ 813 if (!dev->allow_func_id_match) 814 return 0; 815 } 816 817 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) { 818 if (!dev->socket->fake_cis) 819 pcmcia_load_firmware(dev, did->cisfile); 820 821 if (!dev->socket->fake_cis) 822 return 0; 823 } 824 825 if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) { 826 int i; 827 for (i=0; i<4; i++) 828 if (dev->prod_id[i]) 829 return 0; 830 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id) 831 return 0; 832 } 833 834 dev->dev.driver_data = (void *) did; 835 836 return 1; 837 } 838 839 840 static int pcmcia_bus_match(struct device * dev, struct device_driver * drv) { 841 struct pcmcia_device * p_dev = to_pcmcia_dev(dev); 842 struct pcmcia_driver * p_drv = to_pcmcia_drv(drv); 843 struct pcmcia_device_id *did = p_drv->id_table; 844 845 #ifdef CONFIG_PCMCIA_IOCTL 846 /* matching by cardmgr */ 847 if (p_dev->cardmgr == p_drv) 848 return 1; 849 #endif 850 851 while (did && did->match_flags) { 852 if (pcmcia_devmatch(p_dev, did)) 853 return 1; 854 did++; 855 } 856 857 return 0; 858 } 859 860 #ifdef CONFIG_HOTPLUG 861 862 static int pcmcia_bus_uevent(struct device *dev, char **envp, int num_envp, 863 char *buffer, int buffer_size) 864 { 865 struct pcmcia_device *p_dev; 866 int i, length = 0; 867 u32 hash[4] = { 0, 0, 0, 0}; 868 869 if (!dev) 870 return -ENODEV; 871 872 p_dev = to_pcmcia_dev(dev); 873 874 /* calculate hashes */ 875 for (i=0; i<4; i++) { 876 if (!p_dev->prod_id[i]) 877 continue; 878 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i])); 879 } 880 881 i = 0; 882 883 if (add_uevent_var(envp, num_envp, &i, 884 buffer, buffer_size, &length, 885 "SOCKET_NO=%u", 886 p_dev->socket->sock)) 887 return -ENOMEM; 888 889 if (add_uevent_var(envp, num_envp, &i, 890 buffer, buffer_size, &length, 891 "DEVICE_NO=%02X", 892 p_dev->device_no)) 893 return -ENOMEM; 894 895 if (add_uevent_var(envp, num_envp, &i, 896 buffer, buffer_size, &length, 897 "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X" 898 "pa%08Xpb%08Xpc%08Xpd%08X", 899 p_dev->has_manf_id ? p_dev->manf_id : 0, 900 p_dev->has_card_id ? p_dev->card_id : 0, 901 p_dev->has_func_id ? p_dev->func_id : 0, 902 p_dev->func, 903 p_dev->device_no, 904 hash[0], 905 hash[1], 906 hash[2], 907 hash[3])) 908 return -ENOMEM; 909 910 envp[i] = NULL; 911 912 return 0; 913 } 914 915 #else 916 917 static int pcmcia_bus_uevent(struct device *dev, char **envp, int num_envp, 918 char *buffer, int buffer_size) 919 { 920 return -ENODEV; 921 } 922 923 #endif 924 925 /************************ per-device sysfs output ***************************/ 926 927 #define pcmcia_device_attr(field, test, format) \ 928 static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf) \ 929 { \ 930 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \ 931 return p_dev->test ? sprintf (buf, format, p_dev->field) : -ENODEV; \ 932 } 933 934 #define pcmcia_device_stringattr(name, field) \ 935 static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf) \ 936 { \ 937 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \ 938 return p_dev->field ? sprintf (buf, "%s\n", p_dev->field) : -ENODEV; \ 939 } 940 941 pcmcia_device_attr(func, socket, "0x%02x\n"); 942 pcmcia_device_attr(func_id, has_func_id, "0x%02x\n"); 943 pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n"); 944 pcmcia_device_attr(card_id, has_card_id, "0x%04x\n"); 945 pcmcia_device_stringattr(prod_id1, prod_id[0]); 946 pcmcia_device_stringattr(prod_id2, prod_id[1]); 947 pcmcia_device_stringattr(prod_id3, prod_id[2]); 948 pcmcia_device_stringattr(prod_id4, prod_id[3]); 949 950 951 static ssize_t pcmcia_show_pm_state(struct device *dev, struct device_attribute *attr, char *buf) 952 { 953 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 954 955 if (p_dev->suspended) 956 return sprintf(buf, "off\n"); 957 else 958 return sprintf(buf, "on\n"); 959 } 960 961 static ssize_t pcmcia_store_pm_state(struct device *dev, struct device_attribute *attr, 962 const char *buf, size_t count) 963 { 964 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 965 int ret = 0; 966 967 if (!count) 968 return -EINVAL; 969 970 if ((!p_dev->suspended) && !strncmp(buf, "off", 3)) 971 ret = dpm_runtime_suspend(dev, PMSG_SUSPEND); 972 else if (p_dev->suspended && !strncmp(buf, "on", 2)) 973 dpm_runtime_resume(dev); 974 975 return ret ? ret : count; 976 } 977 978 979 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf) 980 { 981 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 982 int i; 983 u32 hash[4] = { 0, 0, 0, 0}; 984 985 /* calculate hashes */ 986 for (i=0; i<4; i++) { 987 if (!p_dev->prod_id[i]) 988 continue; 989 hash[i] = crc32(0,p_dev->prod_id[i],strlen(p_dev->prod_id[i])); 990 } 991 return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X" 992 "pa%08Xpb%08Xpc%08Xpd%08X\n", 993 p_dev->has_manf_id ? p_dev->manf_id : 0, 994 p_dev->has_card_id ? p_dev->card_id : 0, 995 p_dev->has_func_id ? p_dev->func_id : 0, 996 p_dev->func, p_dev->device_no, 997 hash[0], hash[1], hash[2], hash[3]); 998 } 999 1000 static ssize_t pcmcia_store_allow_func_id_match(struct device *dev, 1001 struct device_attribute *attr, const char *buf, size_t count) 1002 { 1003 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1004 1005 if (!count) 1006 return -EINVAL; 1007 1008 mutex_lock(&p_dev->socket->skt_mutex); 1009 p_dev->allow_func_id_match = 1; 1010 mutex_unlock(&p_dev->socket->skt_mutex); 1011 1012 bus_rescan_devices(&pcmcia_bus_type); 1013 1014 return count; 1015 } 1016 1017 static struct device_attribute pcmcia_dev_attrs[] = { 1018 __ATTR(function, 0444, func_show, NULL), 1019 __ATTR(pm_state, 0644, pcmcia_show_pm_state, pcmcia_store_pm_state), 1020 __ATTR_RO(func_id), 1021 __ATTR_RO(manf_id), 1022 __ATTR_RO(card_id), 1023 __ATTR_RO(prod_id1), 1024 __ATTR_RO(prod_id2), 1025 __ATTR_RO(prod_id3), 1026 __ATTR_RO(prod_id4), 1027 __ATTR_RO(modalias), 1028 __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match), 1029 __ATTR_NULL, 1030 }; 1031 1032 /* PM support, also needed for reset */ 1033 1034 static int pcmcia_dev_suspend(struct device * dev, pm_message_t state) 1035 { 1036 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1037 struct pcmcia_driver *p_drv = NULL; 1038 int ret = 0; 1039 1040 if (dev->driver) 1041 p_drv = to_pcmcia_drv(dev->driver); 1042 1043 if (!p_drv) 1044 goto out; 1045 1046 if (p_drv->suspend) { 1047 ret = p_drv->suspend(p_dev); 1048 if (ret) 1049 goto out; 1050 } 1051 1052 if (p_dev->device_no == p_dev->func) 1053 pcmcia_release_configuration(p_dev); 1054 1055 out: 1056 if (!ret) 1057 p_dev->suspended = 1; 1058 return ret; 1059 } 1060 1061 1062 static int pcmcia_dev_resume(struct device * dev) 1063 { 1064 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1065 struct pcmcia_driver *p_drv = NULL; 1066 int ret = 0; 1067 1068 if (dev->driver) 1069 p_drv = to_pcmcia_drv(dev->driver); 1070 1071 if (!p_drv) 1072 goto out; 1073 1074 if (p_dev->device_no == p_dev->func) { 1075 ret = pcmcia_request_configuration(p_dev, &p_dev->conf); 1076 if (ret) 1077 goto out; 1078 } 1079 1080 if (p_drv->resume) 1081 ret = p_drv->resume(p_dev); 1082 1083 out: 1084 if (!ret) 1085 p_dev->suspended = 0; 1086 return ret; 1087 } 1088 1089 1090 static int pcmcia_bus_suspend_callback(struct device *dev, void * _data) 1091 { 1092 struct pcmcia_socket *skt = _data; 1093 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1094 1095 if (p_dev->socket != skt) 1096 return 0; 1097 1098 return dpm_runtime_suspend(dev, PMSG_SUSPEND); 1099 } 1100 1101 static int pcmcia_bus_resume_callback(struct device *dev, void * _data) 1102 { 1103 struct pcmcia_socket *skt = _data; 1104 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1105 1106 if (p_dev->socket != skt) 1107 return 0; 1108 1109 dpm_runtime_resume(dev); 1110 1111 return 0; 1112 } 1113 1114 static int pcmcia_bus_resume(struct pcmcia_socket *skt) 1115 { 1116 bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback); 1117 return 0; 1118 } 1119 1120 static int pcmcia_bus_suspend(struct pcmcia_socket *skt) 1121 { 1122 if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt, 1123 pcmcia_bus_suspend_callback)) { 1124 pcmcia_bus_resume(skt); 1125 return -EIO; 1126 } 1127 return 0; 1128 } 1129 1130 1131 /*====================================================================== 1132 1133 The card status event handler. 1134 1135 ======================================================================*/ 1136 1137 /* Normally, the event is passed to individual drivers after 1138 * informing userspace. Only for CS_EVENT_CARD_REMOVAL this 1139 * is inversed to maintain historic compatibility. 1140 */ 1141 1142 static int ds_event(struct pcmcia_socket *skt, event_t event, int priority) 1143 { 1144 struct pcmcia_socket *s = pcmcia_get_socket(skt); 1145 1146 if (!s) { 1147 printk(KERN_ERR "PCMCIA obtaining reference to socket %p " \ 1148 "failed, event 0x%x lost!\n", skt, event); 1149 return -ENODEV; 1150 } 1151 1152 ds_dbg(1, "ds_event(0x%06x, %d, 0x%p)\n", 1153 event, priority, skt); 1154 1155 switch (event) { 1156 case CS_EVENT_CARD_REMOVAL: 1157 s->pcmcia_state.present = 0; 1158 pcmcia_card_remove(skt, NULL); 1159 handle_event(skt, event); 1160 break; 1161 1162 case CS_EVENT_CARD_INSERTION: 1163 s->pcmcia_state.present = 1; 1164 pcmcia_card_add(skt); 1165 handle_event(skt, event); 1166 break; 1167 1168 case CS_EVENT_EJECTION_REQUEST: 1169 break; 1170 1171 case CS_EVENT_PM_SUSPEND: 1172 case CS_EVENT_PM_RESUME: 1173 case CS_EVENT_RESET_PHYSICAL: 1174 case CS_EVENT_CARD_RESET: 1175 default: 1176 handle_event(skt, event); 1177 break; 1178 } 1179 1180 pcmcia_put_socket(s); 1181 1182 return 0; 1183 } /* ds_event */ 1184 1185 1186 struct pcmcia_device * pcmcia_dev_present(struct pcmcia_device *_p_dev) 1187 { 1188 struct pcmcia_device *p_dev; 1189 struct pcmcia_device *ret = NULL; 1190 1191 p_dev = pcmcia_get_dev(_p_dev); 1192 if (!p_dev) 1193 return NULL; 1194 1195 if (!p_dev->socket->pcmcia_state.present) 1196 goto out; 1197 1198 if (p_dev->_removed) 1199 goto out; 1200 1201 if (p_dev->suspended) 1202 goto out; 1203 1204 ret = p_dev; 1205 out: 1206 pcmcia_put_dev(p_dev); 1207 return ret; 1208 } 1209 EXPORT_SYMBOL(pcmcia_dev_present); 1210 1211 1212 static struct pcmcia_callback pcmcia_bus_callback = { 1213 .owner = THIS_MODULE, 1214 .event = ds_event, 1215 .requery = pcmcia_bus_rescan, 1216 .suspend = pcmcia_bus_suspend, 1217 .resume = pcmcia_bus_resume, 1218 }; 1219 1220 static int __devinit pcmcia_bus_add_socket(struct class_device *class_dev, 1221 struct class_interface *class_intf) 1222 { 1223 struct pcmcia_socket *socket = class_get_devdata(class_dev); 1224 int ret; 1225 1226 socket = pcmcia_get_socket(socket); 1227 if (!socket) { 1228 printk(KERN_ERR "PCMCIA obtaining reference to socket %p failed\n", socket); 1229 return -ENODEV; 1230 } 1231 1232 /* 1233 * Ugly. But we want to wait for the socket threads to have started up. 1234 * We really should let the drivers themselves drive some of this.. 1235 */ 1236 msleep(250); 1237 1238 #ifdef CONFIG_PCMCIA_IOCTL 1239 init_waitqueue_head(&socket->queue); 1240 #endif 1241 INIT_LIST_HEAD(&socket->devices_list); 1242 INIT_WORK(&socket->device_add, pcmcia_delayed_add_pseudo_device, socket); 1243 memset(&socket->pcmcia_state, 0, sizeof(u8)); 1244 socket->device_count = 0; 1245 1246 ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback); 1247 if (ret) { 1248 printk(KERN_ERR "PCMCIA registration PCCard core failed for socket %p\n", socket); 1249 pcmcia_put_socket(socket); 1250 return (ret); 1251 } 1252 1253 return 0; 1254 } 1255 1256 static void pcmcia_bus_remove_socket(struct class_device *class_dev, 1257 struct class_interface *class_intf) 1258 { 1259 struct pcmcia_socket *socket = class_get_devdata(class_dev); 1260 1261 if (!socket) 1262 return; 1263 1264 socket->pcmcia_state.dead = 1; 1265 pccard_register_pcmcia(socket, NULL); 1266 1267 pcmcia_put_socket(socket); 1268 1269 return; 1270 } 1271 1272 1273 /* the pcmcia_bus_interface is used to handle pcmcia socket devices */ 1274 static struct class_interface pcmcia_bus_interface = { 1275 .class = &pcmcia_socket_class, 1276 .add = &pcmcia_bus_add_socket, 1277 .remove = &pcmcia_bus_remove_socket, 1278 }; 1279 1280 1281 struct bus_type pcmcia_bus_type = { 1282 .name = "pcmcia", 1283 .uevent = pcmcia_bus_uevent, 1284 .match = pcmcia_bus_match, 1285 .dev_attrs = pcmcia_dev_attrs, 1286 .probe = pcmcia_device_probe, 1287 .remove = pcmcia_device_remove, 1288 .suspend = pcmcia_dev_suspend, 1289 .resume = pcmcia_dev_resume, 1290 }; 1291 1292 1293 static int __init init_pcmcia_bus(void) 1294 { 1295 spin_lock_init(&pcmcia_dev_list_lock); 1296 1297 bus_register(&pcmcia_bus_type); 1298 class_interface_register(&pcmcia_bus_interface); 1299 1300 pcmcia_setup_ioctl(); 1301 1302 return 0; 1303 } 1304 fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that 1305 * pcmcia_socket_class is already registered */ 1306 1307 1308 static void __exit exit_pcmcia_bus(void) 1309 { 1310 pcmcia_cleanup_ioctl(); 1311 1312 class_interface_unregister(&pcmcia_bus_interface); 1313 1314 bus_unregister(&pcmcia_bus_type); 1315 } 1316 module_exit(exit_pcmcia_bus); 1317 1318 1319 MODULE_ALIAS("ds"); 1320