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/cis/ 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/cis/ 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 static int pcmcia_device_probe(struct device *dev); 302 static int pcmcia_device_remove(struct device * dev); 303 304 int pcmcia_register_driver(struct pcmcia_driver *driver) 305 { 306 if (!driver) 307 return -EINVAL; 308 309 pcmcia_check_driver(driver); 310 311 /* initialize common fields */ 312 driver->drv.bus = &pcmcia_bus_type; 313 driver->drv.owner = driver->owner; 314 315 return driver_register(&driver->drv); 316 } 317 EXPORT_SYMBOL(pcmcia_register_driver); 318 319 /** 320 * pcmcia_unregister_driver - unregister a PCMCIA driver with the bus core 321 */ 322 void pcmcia_unregister_driver(struct pcmcia_driver *driver) 323 { 324 driver_unregister(&driver->drv); 325 } 326 EXPORT_SYMBOL(pcmcia_unregister_driver); 327 328 329 /* pcmcia_device handling */ 330 331 struct pcmcia_device * pcmcia_get_dev(struct pcmcia_device *p_dev) 332 { 333 struct device *tmp_dev; 334 tmp_dev = get_device(&p_dev->dev); 335 if (!tmp_dev) 336 return NULL; 337 return to_pcmcia_dev(tmp_dev); 338 } 339 340 void pcmcia_put_dev(struct pcmcia_device *p_dev) 341 { 342 if (p_dev) 343 put_device(&p_dev->dev); 344 } 345 346 static void pcmcia_release_function(struct kref *ref) 347 { 348 struct config_t *c = container_of(ref, struct config_t, ref); 349 kfree(c); 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->devname); 358 kref_put(&p_dev->function_config->ref, pcmcia_release_function); 359 kfree(p_dev); 360 } 361 362 static void pcmcia_add_pseudo_device(struct pcmcia_socket *s) 363 { 364 if (!s->pcmcia_state.device_add_pending) { 365 s->pcmcia_state.device_add_pending = 1; 366 schedule_work(&s->device_add); 367 } 368 return; 369 } 370 371 static int pcmcia_device_probe(struct device * dev) 372 { 373 struct pcmcia_device *p_dev; 374 struct pcmcia_driver *p_drv; 375 struct pcmcia_device_id *did; 376 struct pcmcia_socket *s; 377 int ret = 0; 378 379 dev = get_device(dev); 380 if (!dev) 381 return -ENODEV; 382 383 p_dev = to_pcmcia_dev(dev); 384 p_drv = to_pcmcia_drv(dev->driver); 385 s = p_dev->socket; 386 387 if ((!p_drv->probe) || (!p_dev->function_config) || 388 (!try_module_get(p_drv->owner))) { 389 ret = -EINVAL; 390 goto put_dev; 391 } 392 393 ret = p_drv->probe(p_dev); 394 if (ret) 395 goto put_module; 396 397 /* handle pseudo multifunction devices: 398 * there are at most two pseudo multifunction devices. 399 * if we're matching against the first, schedule a 400 * call which will then check whether there are two 401 * pseudo devices, and if not, add the second one. 402 */ 403 did = (struct pcmcia_device_id *) p_dev->dev.driver_data; 404 if (did && (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) && 405 (p_dev->socket->device_count == 1) && (p_dev->device_no == 0)) 406 pcmcia_add_pseudo_device(p_dev->socket); 407 408 put_module: 409 if (ret) 410 module_put(p_drv->owner); 411 put_dev: 412 if (ret) 413 put_device(dev); 414 return (ret); 415 } 416 417 418 /* 419 * Removes a PCMCIA card from the device tree and socket list. 420 */ 421 static void pcmcia_card_remove(struct pcmcia_socket *s, struct pcmcia_device *leftover) 422 { 423 struct pcmcia_device *p_dev; 424 struct pcmcia_device *tmp; 425 unsigned long flags; 426 427 ds_dbg(2, "unbind_request(%d)\n", s->sock); 428 429 430 if (!leftover) 431 s->device_count = 0; 432 else 433 s->device_count = 1; 434 435 /* unregister all pcmcia_devices registered with this socket, except leftover */ 436 list_for_each_entry_safe(p_dev, tmp, &s->devices_list, socket_device_list) { 437 if (p_dev == leftover) 438 continue; 439 440 spin_lock_irqsave(&pcmcia_dev_list_lock, flags); 441 list_del(&p_dev->socket_device_list); 442 p_dev->_removed=1; 443 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags); 444 445 device_unregister(&p_dev->dev); 446 } 447 448 return; 449 } 450 451 452 static int pcmcia_device_remove(struct device * dev) 453 { 454 struct pcmcia_device *p_dev; 455 struct pcmcia_driver *p_drv; 456 struct pcmcia_device_id *did; 457 int i; 458 459 p_dev = to_pcmcia_dev(dev); 460 p_drv = to_pcmcia_drv(dev->driver); 461 462 /* If we're removing the primary module driving a 463 * pseudo multi-function card, we need to unbind 464 * all devices 465 */ 466 did = (struct pcmcia_device_id *) p_dev->dev.driver_data; 467 if (did && (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) && 468 (p_dev->socket->device_count != 0) && 469 (p_dev->device_no == 0)) 470 pcmcia_card_remove(p_dev->socket, p_dev); 471 472 /* detach the "instance" */ 473 if (!p_drv) 474 return 0; 475 476 if (p_drv->remove) 477 p_drv->remove(p_dev); 478 479 /* check for proper unloading */ 480 if (p_dev->_irq || p_dev->_io || p_dev->_locked) 481 printk(KERN_INFO "pcmcia: driver %s did not release config properly\n", 482 p_drv->drv.name); 483 484 for (i = 0; i < MAX_WIN; i++) 485 if (p_dev->_win & CLIENT_WIN_REQ(i)) 486 printk(KERN_INFO "pcmcia: driver %s did not release windows properly\n", 487 p_drv->drv.name); 488 489 /* references from pcmcia_probe_device */ 490 pcmcia_put_dev(p_dev); 491 module_put(p_drv->owner); 492 493 return 0; 494 } 495 496 497 /* 498 * pcmcia_device_query -- determine information about a pcmcia device 499 */ 500 static int pcmcia_device_query(struct pcmcia_device *p_dev) 501 { 502 cistpl_manfid_t manf_id; 503 cistpl_funcid_t func_id; 504 cistpl_vers_1_t *vers1; 505 unsigned int i; 506 507 vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL); 508 if (!vers1) 509 return -ENOMEM; 510 511 if (!pccard_read_tuple(p_dev->socket, p_dev->func, 512 CISTPL_MANFID, &manf_id)) { 513 p_dev->manf_id = manf_id.manf; 514 p_dev->card_id = manf_id.card; 515 p_dev->has_manf_id = 1; 516 p_dev->has_card_id = 1; 517 } 518 519 if (!pccard_read_tuple(p_dev->socket, p_dev->func, 520 CISTPL_FUNCID, &func_id)) { 521 p_dev->func_id = func_id.func; 522 p_dev->has_func_id = 1; 523 } else { 524 /* rule of thumb: cards with no FUNCID, but with 525 * common memory device geometry information, are 526 * probably memory cards (from pcmcia-cs) */ 527 cistpl_device_geo_t *devgeo; 528 529 devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL); 530 if (!devgeo) { 531 kfree(vers1); 532 return -ENOMEM; 533 } 534 if (!pccard_read_tuple(p_dev->socket, p_dev->func, 535 CISTPL_DEVICE_GEO, devgeo)) { 536 ds_dbg(0, "mem device geometry probably means " 537 "FUNCID_MEMORY\n"); 538 p_dev->func_id = CISTPL_FUNCID_MEMORY; 539 p_dev->has_func_id = 1; 540 } 541 kfree(devgeo); 542 } 543 544 if (!pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_VERS_1, 545 vers1)) { 546 for (i=0; i < vers1->ns; i++) { 547 char *tmp; 548 unsigned int length; 549 550 tmp = vers1->str + vers1->ofs[i]; 551 552 length = strlen(tmp) + 1; 553 if ((length < 2) || (length > 255)) 554 continue; 555 556 p_dev->prod_id[i] = kmalloc(sizeof(char) * length, 557 GFP_KERNEL); 558 if (!p_dev->prod_id[i]) 559 continue; 560 561 p_dev->prod_id[i] = strncpy(p_dev->prod_id[i], 562 tmp, length); 563 } 564 } 565 566 kfree(vers1); 567 return 0; 568 } 569 570 571 /* device_add_lock is needed to avoid double registration by cardmgr and kernel. 572 * Serializes pcmcia_device_add; will most likely be removed in future. 573 * 574 * While it has the caveat that adding new PCMCIA devices inside(!) device_register() 575 * won't work, this doesn't matter much at the moment: the driver core doesn't 576 * support it either. 577 */ 578 static DEFINE_MUTEX(device_add_lock); 579 580 struct pcmcia_device * pcmcia_device_add(struct pcmcia_socket *s, unsigned int function) 581 { 582 struct pcmcia_device *p_dev, *tmp_dev; 583 unsigned long flags; 584 int bus_id_len; 585 586 s = pcmcia_get_socket(s); 587 if (!s) 588 return NULL; 589 590 mutex_lock(&device_add_lock); 591 592 /* max of 2 devices per card */ 593 if (s->device_count == 2) 594 goto err_put; 595 596 p_dev = kzalloc(sizeof(struct pcmcia_device), GFP_KERNEL); 597 if (!p_dev) 598 goto err_put; 599 600 p_dev->socket = s; 601 p_dev->device_no = (s->device_count++); 602 p_dev->func = function; 603 if (s->functions <= function) 604 s->functions = function + 1; 605 606 p_dev->dev.bus = &pcmcia_bus_type; 607 p_dev->dev.parent = s->dev.dev; 608 p_dev->dev.release = pcmcia_release_dev; 609 bus_id_len = sprintf (p_dev->dev.bus_id, "%d.%d", p_dev->socket->sock, p_dev->device_no); 610 611 p_dev->devname = kmalloc(6 + bus_id_len + 1, GFP_KERNEL); 612 if (!p_dev->devname) 613 goto err_free; 614 sprintf (p_dev->devname, "pcmcia%s", p_dev->dev.bus_id); 615 616 /* compat */ 617 spin_lock_irqsave(&pcmcia_dev_list_lock, flags); 618 619 /* 620 * p_dev->function_config must be the same for all card functions. 621 * Note that this is serialized by the device_add_lock, so that 622 * only one such struct will be created. 623 */ 624 list_for_each_entry(tmp_dev, &s->devices_list, socket_device_list) 625 if (p_dev->func == tmp_dev->func) { 626 p_dev->function_config = tmp_dev->function_config; 627 kref_get(&p_dev->function_config->ref); 628 } 629 630 /* Add to the list in pcmcia_bus_socket */ 631 list_add_tail(&p_dev->socket_device_list, &s->devices_list); 632 633 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags); 634 635 if (!p_dev->function_config) { 636 p_dev->function_config = kzalloc(sizeof(struct config_t), 637 GFP_KERNEL); 638 if (!p_dev->function_config) 639 goto err_unreg; 640 kref_init(&p_dev->function_config->ref); 641 } 642 643 printk(KERN_NOTICE "pcmcia: registering new device %s\n", 644 p_dev->devname); 645 646 pcmcia_device_query(p_dev); 647 648 if (device_register(&p_dev->dev)) 649 goto err_unreg; 650 651 mutex_unlock(&device_add_lock); 652 653 return p_dev; 654 655 err_unreg: 656 spin_lock_irqsave(&pcmcia_dev_list_lock, flags); 657 list_del(&p_dev->socket_device_list); 658 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags); 659 660 err_free: 661 kfree(p_dev->devname); 662 kfree(p_dev); 663 s->device_count--; 664 err_put: 665 mutex_unlock(&device_add_lock); 666 pcmcia_put_socket(s); 667 668 return NULL; 669 } 670 671 672 static int pcmcia_card_add(struct pcmcia_socket *s) 673 { 674 cisinfo_t cisinfo; 675 cistpl_longlink_mfc_t mfc; 676 unsigned int no_funcs, i; 677 int ret = 0; 678 679 if (!(s->resource_setup_done)) 680 return -EAGAIN; /* try again, but later... */ 681 682 if (pcmcia_validate_mem(s)) 683 return -EAGAIN; /* try again, but later... */ 684 685 ret = pccard_validate_cis(s, BIND_FN_ALL, &cisinfo); 686 if (ret || !cisinfo.Chains) { 687 ds_dbg(0, "invalid CIS or invalid resources\n"); 688 return -ENODEV; 689 } 690 691 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc)) 692 no_funcs = mfc.nfn; 693 else 694 no_funcs = 1; 695 696 for (i=0; i < no_funcs; i++) 697 pcmcia_device_add(s, i); 698 699 return (ret); 700 } 701 702 703 static void pcmcia_delayed_add_pseudo_device(void *data) 704 { 705 struct pcmcia_socket *s = data; 706 pcmcia_device_add(s, 0); 707 s->pcmcia_state.device_add_pending = 0; 708 } 709 710 static int pcmcia_requery(struct device *dev, void * _data) 711 { 712 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 713 if (!p_dev->dev.driver) 714 pcmcia_device_query(p_dev); 715 716 return 0; 717 } 718 719 static void pcmcia_bus_rescan(struct pcmcia_socket *skt) 720 { 721 int no_devices=0; 722 unsigned long flags; 723 724 /* must be called with skt_mutex held */ 725 spin_lock_irqsave(&pcmcia_dev_list_lock, flags); 726 if (list_empty(&skt->devices_list)) 727 no_devices=1; 728 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags); 729 730 /* if no devices were added for this socket yet because of 731 * missing resource information or other trouble, we need to 732 * do this now. */ 733 if (no_devices) { 734 int ret = pcmcia_card_add(skt); 735 if (ret) 736 return; 737 } 738 739 /* some device information might have changed because of a CIS 740 * update or because we can finally read it correctly... so 741 * determine it again, overwriting old values if necessary. */ 742 bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery); 743 744 /* we re-scan all devices, not just the ones connected to this 745 * socket. This does not matter, though. */ 746 bus_rescan_devices(&pcmcia_bus_type); 747 } 748 749 static inline int pcmcia_devmatch(struct pcmcia_device *dev, 750 struct pcmcia_device_id *did) 751 { 752 if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) { 753 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id)) 754 return 0; 755 } 756 757 if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) { 758 if ((!dev->has_card_id) || (dev->card_id != did->card_id)) 759 return 0; 760 } 761 762 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) { 763 if (dev->func != did->function) 764 return 0; 765 } 766 767 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) { 768 if (!dev->prod_id[0]) 769 return 0; 770 if (strcmp(did->prod_id[0], dev->prod_id[0])) 771 return 0; 772 } 773 774 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) { 775 if (!dev->prod_id[1]) 776 return 0; 777 if (strcmp(did->prod_id[1], dev->prod_id[1])) 778 return 0; 779 } 780 781 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) { 782 if (!dev->prod_id[2]) 783 return 0; 784 if (strcmp(did->prod_id[2], dev->prod_id[2])) 785 return 0; 786 } 787 788 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) { 789 if (!dev->prod_id[3]) 790 return 0; 791 if (strcmp(did->prod_id[3], dev->prod_id[3])) 792 return 0; 793 } 794 795 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) { 796 if (dev->device_no != did->device_no) 797 return 0; 798 } 799 800 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) { 801 if ((!dev->has_func_id) || (dev->func_id != did->func_id)) 802 return 0; 803 804 /* if this is a pseudo-multi-function device, 805 * we need explicit matches */ 806 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) 807 return 0; 808 if (dev->device_no) 809 return 0; 810 811 /* also, FUNC_ID matching needs to be activated by userspace 812 * after it has re-checked that there is no possible module 813 * with a prod_id/manf_id/card_id match. 814 */ 815 if (!dev->allow_func_id_match) 816 return 0; 817 } 818 819 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) { 820 if (!dev->socket->fake_cis) 821 pcmcia_load_firmware(dev, did->cisfile); 822 823 if (!dev->socket->fake_cis) 824 return 0; 825 } 826 827 if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) { 828 int i; 829 for (i=0; i<4; i++) 830 if (dev->prod_id[i]) 831 return 0; 832 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id) 833 return 0; 834 } 835 836 dev->dev.driver_data = (void *) did; 837 838 return 1; 839 } 840 841 842 static int pcmcia_bus_match(struct device * dev, struct device_driver * drv) { 843 struct pcmcia_device * p_dev = to_pcmcia_dev(dev); 844 struct pcmcia_driver * p_drv = to_pcmcia_drv(drv); 845 struct pcmcia_device_id *did = p_drv->id_table; 846 847 #ifdef CONFIG_PCMCIA_IOCTL 848 /* matching by cardmgr */ 849 if (p_dev->cardmgr == p_drv) 850 return 1; 851 #endif 852 853 while (did && did->match_flags) { 854 if (pcmcia_devmatch(p_dev, did)) 855 return 1; 856 did++; 857 } 858 859 return 0; 860 } 861 862 #ifdef CONFIG_HOTPLUG 863 864 static int pcmcia_bus_uevent(struct device *dev, char **envp, int num_envp, 865 char *buffer, int buffer_size) 866 { 867 struct pcmcia_device *p_dev; 868 int i, length = 0; 869 u32 hash[4] = { 0, 0, 0, 0}; 870 871 if (!dev) 872 return -ENODEV; 873 874 p_dev = to_pcmcia_dev(dev); 875 876 /* calculate hashes */ 877 for (i=0; i<4; i++) { 878 if (!p_dev->prod_id[i]) 879 continue; 880 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i])); 881 } 882 883 i = 0; 884 885 if (add_uevent_var(envp, num_envp, &i, 886 buffer, buffer_size, &length, 887 "SOCKET_NO=%u", 888 p_dev->socket->sock)) 889 return -ENOMEM; 890 891 if (add_uevent_var(envp, num_envp, &i, 892 buffer, buffer_size, &length, 893 "DEVICE_NO=%02X", 894 p_dev->device_no)) 895 return -ENOMEM; 896 897 if (add_uevent_var(envp, num_envp, &i, 898 buffer, buffer_size, &length, 899 "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X" 900 "pa%08Xpb%08Xpc%08Xpd%08X", 901 p_dev->has_manf_id ? p_dev->manf_id : 0, 902 p_dev->has_card_id ? p_dev->card_id : 0, 903 p_dev->has_func_id ? p_dev->func_id : 0, 904 p_dev->func, 905 p_dev->device_no, 906 hash[0], 907 hash[1], 908 hash[2], 909 hash[3])) 910 return -ENOMEM; 911 912 envp[i] = NULL; 913 914 return 0; 915 } 916 917 #else 918 919 static int pcmcia_bus_uevent(struct device *dev, char **envp, int num_envp, 920 char *buffer, int buffer_size) 921 { 922 return -ENODEV; 923 } 924 925 #endif 926 927 /************************ per-device sysfs output ***************************/ 928 929 #define pcmcia_device_attr(field, test, format) \ 930 static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf) \ 931 { \ 932 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \ 933 return p_dev->test ? sprintf (buf, format, p_dev->field) : -ENODEV; \ 934 } 935 936 #define pcmcia_device_stringattr(name, field) \ 937 static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf) \ 938 { \ 939 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \ 940 return p_dev->field ? sprintf (buf, "%s\n", p_dev->field) : -ENODEV; \ 941 } 942 943 pcmcia_device_attr(func, socket, "0x%02x\n"); 944 pcmcia_device_attr(func_id, has_func_id, "0x%02x\n"); 945 pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n"); 946 pcmcia_device_attr(card_id, has_card_id, "0x%04x\n"); 947 pcmcia_device_stringattr(prod_id1, prod_id[0]); 948 pcmcia_device_stringattr(prod_id2, prod_id[1]); 949 pcmcia_device_stringattr(prod_id3, prod_id[2]); 950 pcmcia_device_stringattr(prod_id4, prod_id[3]); 951 952 953 static ssize_t pcmcia_show_pm_state(struct device *dev, struct device_attribute *attr, char *buf) 954 { 955 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 956 957 if (p_dev->suspended) 958 return sprintf(buf, "off\n"); 959 else 960 return sprintf(buf, "on\n"); 961 } 962 963 static ssize_t pcmcia_store_pm_state(struct device *dev, struct device_attribute *attr, 964 const char *buf, size_t count) 965 { 966 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 967 int ret = 0; 968 969 if (!count) 970 return -EINVAL; 971 972 if ((!p_dev->suspended) && !strncmp(buf, "off", 3)) 973 ret = dpm_runtime_suspend(dev, PMSG_SUSPEND); 974 else if (p_dev->suspended && !strncmp(buf, "on", 2)) 975 dpm_runtime_resume(dev); 976 977 return ret ? ret : count; 978 } 979 980 981 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf) 982 { 983 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 984 int i; 985 u32 hash[4] = { 0, 0, 0, 0}; 986 987 /* calculate hashes */ 988 for (i=0; i<4; i++) { 989 if (!p_dev->prod_id[i]) 990 continue; 991 hash[i] = crc32(0,p_dev->prod_id[i],strlen(p_dev->prod_id[i])); 992 } 993 return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X" 994 "pa%08Xpb%08Xpc%08Xpd%08X\n", 995 p_dev->has_manf_id ? p_dev->manf_id : 0, 996 p_dev->has_card_id ? p_dev->card_id : 0, 997 p_dev->has_func_id ? p_dev->func_id : 0, 998 p_dev->func, p_dev->device_no, 999 hash[0], hash[1], hash[2], hash[3]); 1000 } 1001 1002 static ssize_t pcmcia_store_allow_func_id_match(struct device *dev, 1003 struct device_attribute *attr, const char *buf, size_t count) 1004 { 1005 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1006 1007 if (!count) 1008 return -EINVAL; 1009 1010 mutex_lock(&p_dev->socket->skt_mutex); 1011 p_dev->allow_func_id_match = 1; 1012 mutex_unlock(&p_dev->socket->skt_mutex); 1013 1014 bus_rescan_devices(&pcmcia_bus_type); 1015 1016 return count; 1017 } 1018 1019 static struct device_attribute pcmcia_dev_attrs[] = { 1020 __ATTR(function, 0444, func_show, NULL), 1021 __ATTR(pm_state, 0644, pcmcia_show_pm_state, pcmcia_store_pm_state), 1022 __ATTR_RO(func_id), 1023 __ATTR_RO(manf_id), 1024 __ATTR_RO(card_id), 1025 __ATTR_RO(prod_id1), 1026 __ATTR_RO(prod_id2), 1027 __ATTR_RO(prod_id3), 1028 __ATTR_RO(prod_id4), 1029 __ATTR_RO(modalias), 1030 __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match), 1031 __ATTR_NULL, 1032 }; 1033 1034 /* PM support, also needed for reset */ 1035 1036 static int pcmcia_dev_suspend(struct device * dev, pm_message_t state) 1037 { 1038 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1039 struct pcmcia_driver *p_drv = NULL; 1040 int ret = 0; 1041 1042 if (dev->driver) 1043 p_drv = to_pcmcia_drv(dev->driver); 1044 1045 if (!p_drv) 1046 goto out; 1047 1048 if (p_drv->suspend) { 1049 ret = p_drv->suspend(p_dev); 1050 if (ret) 1051 goto out; 1052 } 1053 1054 if (p_dev->device_no == p_dev->func) 1055 pcmcia_release_configuration(p_dev); 1056 1057 out: 1058 if (!ret) 1059 p_dev->suspended = 1; 1060 return ret; 1061 } 1062 1063 1064 static int pcmcia_dev_resume(struct device * dev) 1065 { 1066 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1067 struct pcmcia_driver *p_drv = NULL; 1068 int ret = 0; 1069 1070 if (dev->driver) 1071 p_drv = to_pcmcia_drv(dev->driver); 1072 1073 if (!p_drv) 1074 goto out; 1075 1076 if (p_dev->device_no == p_dev->func) { 1077 ret = pcmcia_request_configuration(p_dev, &p_dev->conf); 1078 if (ret) 1079 goto out; 1080 } 1081 1082 if (p_drv->resume) 1083 ret = p_drv->resume(p_dev); 1084 1085 out: 1086 if (!ret) 1087 p_dev->suspended = 0; 1088 return ret; 1089 } 1090 1091 1092 static int pcmcia_bus_suspend_callback(struct device *dev, void * _data) 1093 { 1094 struct pcmcia_socket *skt = _data; 1095 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1096 1097 if (p_dev->socket != skt) 1098 return 0; 1099 1100 return dpm_runtime_suspend(dev, PMSG_SUSPEND); 1101 } 1102 1103 static int pcmcia_bus_resume_callback(struct device *dev, void * _data) 1104 { 1105 struct pcmcia_socket *skt = _data; 1106 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1107 1108 if (p_dev->socket != skt) 1109 return 0; 1110 1111 dpm_runtime_resume(dev); 1112 1113 return 0; 1114 } 1115 1116 static int pcmcia_bus_resume(struct pcmcia_socket *skt) 1117 { 1118 bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback); 1119 return 0; 1120 } 1121 1122 static int pcmcia_bus_suspend(struct pcmcia_socket *skt) 1123 { 1124 if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt, 1125 pcmcia_bus_suspend_callback)) { 1126 pcmcia_bus_resume(skt); 1127 return -EIO; 1128 } 1129 return 0; 1130 } 1131 1132 1133 /*====================================================================== 1134 1135 The card status event handler. 1136 1137 ======================================================================*/ 1138 1139 /* Normally, the event is passed to individual drivers after 1140 * informing userspace. Only for CS_EVENT_CARD_REMOVAL this 1141 * is inversed to maintain historic compatibility. 1142 */ 1143 1144 static int ds_event(struct pcmcia_socket *skt, event_t event, int priority) 1145 { 1146 struct pcmcia_socket *s = pcmcia_get_socket(skt); 1147 1148 ds_dbg(1, "ds_event(0x%06x, %d, 0x%p)\n", 1149 event, priority, skt); 1150 1151 switch (event) { 1152 case CS_EVENT_CARD_REMOVAL: 1153 s->pcmcia_state.present = 0; 1154 pcmcia_card_remove(skt, NULL); 1155 handle_event(skt, event); 1156 break; 1157 1158 case CS_EVENT_CARD_INSERTION: 1159 s->pcmcia_state.present = 1; 1160 pcmcia_card_add(skt); 1161 handle_event(skt, event); 1162 break; 1163 1164 case CS_EVENT_EJECTION_REQUEST: 1165 break; 1166 1167 case CS_EVENT_PM_SUSPEND: 1168 case CS_EVENT_PM_RESUME: 1169 case CS_EVENT_RESET_PHYSICAL: 1170 case CS_EVENT_CARD_RESET: 1171 default: 1172 handle_event(skt, event); 1173 break; 1174 } 1175 1176 pcmcia_put_socket(s); 1177 1178 return 0; 1179 } /* ds_event */ 1180 1181 1182 struct pcmcia_device * pcmcia_dev_present(struct pcmcia_device *_p_dev) 1183 { 1184 struct pcmcia_device *p_dev; 1185 struct pcmcia_device *ret = NULL; 1186 1187 p_dev = pcmcia_get_dev(_p_dev); 1188 if (!p_dev) 1189 return NULL; 1190 1191 if (!p_dev->socket->pcmcia_state.present) 1192 goto out; 1193 1194 if (p_dev->_removed) 1195 goto out; 1196 1197 if (p_dev->suspended) 1198 goto out; 1199 1200 ret = p_dev; 1201 out: 1202 pcmcia_put_dev(p_dev); 1203 return ret; 1204 } 1205 EXPORT_SYMBOL(pcmcia_dev_present); 1206 1207 1208 static struct pcmcia_callback pcmcia_bus_callback = { 1209 .owner = THIS_MODULE, 1210 .event = ds_event, 1211 .requery = pcmcia_bus_rescan, 1212 .suspend = pcmcia_bus_suspend, 1213 .resume = pcmcia_bus_resume, 1214 }; 1215 1216 static int __devinit pcmcia_bus_add_socket(struct class_device *class_dev, 1217 struct class_interface *class_intf) 1218 { 1219 struct pcmcia_socket *socket = class_get_devdata(class_dev); 1220 int ret; 1221 1222 socket = pcmcia_get_socket(socket); 1223 if (!socket) { 1224 printk(KERN_ERR "PCMCIA obtaining reference to socket %p failed\n", socket); 1225 return -ENODEV; 1226 } 1227 1228 /* 1229 * Ugly. But we want to wait for the socket threads to have started up. 1230 * We really should let the drivers themselves drive some of this.. 1231 */ 1232 msleep(250); 1233 1234 #ifdef CONFIG_PCMCIA_IOCTL 1235 init_waitqueue_head(&socket->queue); 1236 #endif 1237 INIT_LIST_HEAD(&socket->devices_list); 1238 INIT_WORK(&socket->device_add, pcmcia_delayed_add_pseudo_device, socket); 1239 memset(&socket->pcmcia_state, 0, sizeof(u8)); 1240 socket->device_count = 0; 1241 1242 ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback); 1243 if (ret) { 1244 printk(KERN_ERR "PCMCIA registration PCCard core failed for socket %p\n", socket); 1245 pcmcia_put_socket(socket); 1246 return (ret); 1247 } 1248 1249 return 0; 1250 } 1251 1252 static void pcmcia_bus_remove_socket(struct class_device *class_dev, 1253 struct class_interface *class_intf) 1254 { 1255 struct pcmcia_socket *socket = class_get_devdata(class_dev); 1256 1257 if (!socket) 1258 return; 1259 1260 socket->pcmcia_state.dead = 1; 1261 pccard_register_pcmcia(socket, NULL); 1262 1263 pcmcia_put_socket(socket); 1264 1265 return; 1266 } 1267 1268 1269 /* the pcmcia_bus_interface is used to handle pcmcia socket devices */ 1270 static struct class_interface pcmcia_bus_interface = { 1271 .class = &pcmcia_socket_class, 1272 .add = &pcmcia_bus_add_socket, 1273 .remove = &pcmcia_bus_remove_socket, 1274 }; 1275 1276 1277 struct bus_type pcmcia_bus_type = { 1278 .name = "pcmcia", 1279 .uevent = pcmcia_bus_uevent, 1280 .match = pcmcia_bus_match, 1281 .dev_attrs = pcmcia_dev_attrs, 1282 .probe = pcmcia_device_probe, 1283 .remove = pcmcia_device_remove, 1284 .suspend = pcmcia_dev_suspend, 1285 .resume = pcmcia_dev_resume, 1286 }; 1287 1288 1289 static int __init init_pcmcia_bus(void) 1290 { 1291 spin_lock_init(&pcmcia_dev_list_lock); 1292 1293 bus_register(&pcmcia_bus_type); 1294 class_interface_register(&pcmcia_bus_interface); 1295 1296 pcmcia_setup_ioctl(); 1297 1298 return 0; 1299 } 1300 fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that 1301 * pcmcia_socket_class is already registered */ 1302 1303 1304 static void __exit exit_pcmcia_bus(void) 1305 { 1306 pcmcia_cleanup_ioctl(); 1307 1308 class_interface_unregister(&pcmcia_bus_interface); 1309 1310 bus_unregister(&pcmcia_bus_type); 1311 } 1312 module_exit(exit_pcmcia_bus); 1313 1314 1315 MODULE_ALIAS("ds"); 1316