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 /*======================================================================*/ 235 236 237 struct pcmcia_dynid { 238 struct list_head node; 239 struct pcmcia_device_id id; 240 }; 241 242 /** 243 * pcmcia_store_new_id - add a new PCMCIA device ID to this driver and re-probe devices 244 * @driver: target device driver 245 * @buf: buffer for scanning device ID data 246 * @count: input size 247 * 248 * Adds a new dynamic PCMCIA device ID to this driver, 249 * and causes the driver to probe for all devices again. 250 */ 251 static ssize_t 252 pcmcia_store_new_id(struct device_driver *driver, const char *buf, size_t count) 253 { 254 struct pcmcia_dynid *dynid; 255 struct pcmcia_driver *pdrv = to_pcmcia_drv(driver); 256 __u16 match_flags, manf_id, card_id; 257 __u8 func_id, function, device_no; 258 __u32 prod_id_hash[4] = {0, 0, 0, 0}; 259 int fields=0; 260 int retval = 0; 261 262 fields = sscanf(buf, "%hx %hx %hx %hhx %hhx %hhx %x %x %x %x", 263 &match_flags, &manf_id, &card_id, &func_id, &function, &device_no, 264 &prod_id_hash[0], &prod_id_hash[1], &prod_id_hash[2], &prod_id_hash[3]); 265 if (fields < 6) 266 return -EINVAL; 267 268 dynid = kzalloc(sizeof(struct pcmcia_dynid), GFP_KERNEL); 269 if (!dynid) 270 return -ENOMEM; 271 272 INIT_LIST_HEAD(&dynid->node); 273 dynid->id.match_flags = match_flags; 274 dynid->id.manf_id = manf_id; 275 dynid->id.card_id = card_id; 276 dynid->id.func_id = func_id; 277 dynid->id.function = function; 278 dynid->id.device_no = device_no; 279 memcpy(dynid->id.prod_id_hash, prod_id_hash, sizeof(__u32) * 4); 280 281 spin_lock(&pdrv->dynids.lock); 282 list_add_tail(&pdrv->dynids.list, &dynid->node); 283 spin_unlock(&pdrv->dynids.lock); 284 285 if (get_driver(&pdrv->drv)) { 286 retval = driver_attach(&pdrv->drv); 287 put_driver(&pdrv->drv); 288 } 289 290 if (retval) 291 return retval; 292 return count; 293 } 294 static DRIVER_ATTR(new_id, S_IWUSR, NULL, pcmcia_store_new_id); 295 296 static void 297 pcmcia_free_dynids(struct pcmcia_driver *drv) 298 { 299 struct pcmcia_dynid *dynid, *n; 300 301 spin_lock(&drv->dynids.lock); 302 list_for_each_entry_safe(dynid, n, &drv->dynids.list, node) { 303 list_del(&dynid->node); 304 kfree(dynid); 305 } 306 spin_unlock(&drv->dynids.lock); 307 } 308 309 static int 310 pcmcia_create_newid_file(struct pcmcia_driver *drv) 311 { 312 int error = 0; 313 if (drv->probe != NULL) 314 error = sysfs_create_file(&drv->drv.kobj, 315 &driver_attr_new_id.attr); 316 return error; 317 } 318 319 320 /** 321 * pcmcia_register_driver - register a PCMCIA driver with the bus core 322 * 323 * Registers a PCMCIA driver with the PCMCIA bus core. 324 */ 325 int pcmcia_register_driver(struct pcmcia_driver *driver) 326 { 327 int error; 328 329 if (!driver) 330 return -EINVAL; 331 332 pcmcia_check_driver(driver); 333 334 /* initialize common fields */ 335 driver->drv.bus = &pcmcia_bus_type; 336 driver->drv.owner = driver->owner; 337 spin_lock_init(&driver->dynids.lock); 338 INIT_LIST_HEAD(&driver->dynids.list); 339 340 ds_dbg(3, "registering driver %s\n", driver->drv.name); 341 342 error = driver_register(&driver->drv); 343 if (error < 0) 344 return error; 345 346 error = pcmcia_create_newid_file(driver); 347 if (error) 348 driver_unregister(&driver->drv); 349 350 return error; 351 } 352 EXPORT_SYMBOL(pcmcia_register_driver); 353 354 /** 355 * pcmcia_unregister_driver - unregister a PCMCIA driver with the bus core 356 */ 357 void pcmcia_unregister_driver(struct pcmcia_driver *driver) 358 { 359 ds_dbg(3, "unregistering driver %s\n", driver->drv.name); 360 driver_unregister(&driver->drv); 361 pcmcia_free_dynids(driver); 362 } 363 EXPORT_SYMBOL(pcmcia_unregister_driver); 364 365 366 /* pcmcia_device handling */ 367 368 struct pcmcia_device * pcmcia_get_dev(struct pcmcia_device *p_dev) 369 { 370 struct device *tmp_dev; 371 tmp_dev = get_device(&p_dev->dev); 372 if (!tmp_dev) 373 return NULL; 374 return to_pcmcia_dev(tmp_dev); 375 } 376 377 void pcmcia_put_dev(struct pcmcia_device *p_dev) 378 { 379 if (p_dev) 380 put_device(&p_dev->dev); 381 } 382 383 static void pcmcia_release_function(struct kref *ref) 384 { 385 struct config_t *c = container_of(ref, struct config_t, ref); 386 ds_dbg(1, "releasing config_t\n"); 387 kfree(c); 388 } 389 390 static void pcmcia_release_dev(struct device *dev) 391 { 392 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 393 ds_dbg(1, "releasing device %s\n", p_dev->dev.bus_id); 394 pcmcia_put_socket(p_dev->socket); 395 kfree(p_dev->devname); 396 kref_put(&p_dev->function_config->ref, pcmcia_release_function); 397 kfree(p_dev); 398 } 399 400 static void pcmcia_add_device_later(struct pcmcia_socket *s, int mfc) 401 { 402 if (!s->pcmcia_state.device_add_pending) { 403 ds_dbg(1, "scheduling to add %s secondary" 404 " device to %d\n", mfc ? "mfc" : "pfc", s->sock); 405 s->pcmcia_state.device_add_pending = 1; 406 s->pcmcia_state.mfc_pfc = mfc; 407 schedule_work(&s->device_add); 408 } 409 return; 410 } 411 412 static int pcmcia_device_probe(struct device * dev) 413 { 414 struct pcmcia_device *p_dev; 415 struct pcmcia_driver *p_drv; 416 struct pcmcia_device_id *did; 417 struct pcmcia_socket *s; 418 cistpl_config_t cis_config; 419 int ret = 0; 420 421 dev = get_device(dev); 422 if (!dev) 423 return -ENODEV; 424 425 p_dev = to_pcmcia_dev(dev); 426 p_drv = to_pcmcia_drv(dev->driver); 427 s = p_dev->socket; 428 429 ds_dbg(1, "trying to bind %s to %s\n", p_dev->dev.bus_id, 430 p_drv->drv.name); 431 432 if ((!p_drv->probe) || (!p_dev->function_config) || 433 (!try_module_get(p_drv->owner))) { 434 ret = -EINVAL; 435 goto put_dev; 436 } 437 438 /* set up some more device information */ 439 ret = pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_CONFIG, 440 &cis_config); 441 if (!ret) { 442 p_dev->conf.ConfigBase = cis_config.base; 443 p_dev->conf.Present = cis_config.rmask[0]; 444 } else { 445 printk(KERN_INFO "pcmcia: could not parse base and rmask0 of CIS\n"); 446 p_dev->conf.ConfigBase = 0; 447 p_dev->conf.Present = 0; 448 } 449 450 ret = p_drv->probe(p_dev); 451 if (ret) { 452 ds_dbg(1, "binding %s to %s failed with %d\n", 453 p_dev->dev.bus_id, p_drv->drv.name, ret); 454 goto put_module; 455 } 456 457 /* handle pseudo multifunction devices: 458 * there are at most two pseudo multifunction devices. 459 * if we're matching against the first, schedule a 460 * call which will then check whether there are two 461 * pseudo devices, and if not, add the second one. 462 */ 463 did = p_dev->dev.driver_data; 464 if (did && (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) && 465 (p_dev->socket->device_count == 1) && (p_dev->device_no == 0)) 466 pcmcia_add_device_later(p_dev->socket, 0); 467 468 put_module: 469 if (ret) 470 module_put(p_drv->owner); 471 put_dev: 472 if (ret) 473 put_device(dev); 474 return (ret); 475 } 476 477 478 /* 479 * Removes a PCMCIA card from the device tree and socket list. 480 */ 481 static void pcmcia_card_remove(struct pcmcia_socket *s, struct pcmcia_device *leftover) 482 { 483 struct pcmcia_device *p_dev; 484 struct pcmcia_device *tmp; 485 unsigned long flags; 486 487 ds_dbg(2, "pcmcia_card_remove(%d) %s\n", s->sock, 488 leftover ? leftover->devname : ""); 489 490 if (!leftover) 491 s->device_count = 0; 492 else 493 s->device_count = 1; 494 495 /* unregister all pcmcia_devices registered with this socket, except leftover */ 496 list_for_each_entry_safe(p_dev, tmp, &s->devices_list, socket_device_list) { 497 if (p_dev == leftover) 498 continue; 499 500 spin_lock_irqsave(&pcmcia_dev_list_lock, flags); 501 list_del(&p_dev->socket_device_list); 502 p_dev->_removed=1; 503 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags); 504 505 ds_dbg(2, "unregistering device %s\n", p_dev->dev.bus_id); 506 device_unregister(&p_dev->dev); 507 } 508 509 return; 510 } 511 512 static int pcmcia_device_remove(struct device * dev) 513 { 514 struct pcmcia_device *p_dev; 515 struct pcmcia_driver *p_drv; 516 struct pcmcia_device_id *did; 517 int i; 518 519 p_dev = to_pcmcia_dev(dev); 520 p_drv = to_pcmcia_drv(dev->driver); 521 522 ds_dbg(1, "removing device %s\n", p_dev->dev.bus_id); 523 524 /* If we're removing the primary module driving a 525 * pseudo multi-function card, we need to unbind 526 * all devices 527 */ 528 did = p_dev->dev.driver_data; 529 if (did && (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) && 530 (p_dev->socket->device_count != 0) && 531 (p_dev->device_no == 0)) 532 pcmcia_card_remove(p_dev->socket, p_dev); 533 534 /* detach the "instance" */ 535 if (!p_drv) 536 return 0; 537 538 if (p_drv->remove) 539 p_drv->remove(p_dev); 540 541 p_dev->dev_node = NULL; 542 543 /* check for proper unloading */ 544 if (p_dev->_irq || p_dev->_io || p_dev->_locked) 545 printk(KERN_INFO "pcmcia: driver %s did not release config properly\n", 546 p_drv->drv.name); 547 548 for (i = 0; i < MAX_WIN; i++) 549 if (p_dev->_win & CLIENT_WIN_REQ(i)) 550 printk(KERN_INFO "pcmcia: driver %s did not release windows properly\n", 551 p_drv->drv.name); 552 553 /* references from pcmcia_probe_device */ 554 pcmcia_put_dev(p_dev); 555 module_put(p_drv->owner); 556 557 return 0; 558 } 559 560 561 /* 562 * pcmcia_device_query -- determine information about a pcmcia device 563 */ 564 static int pcmcia_device_query(struct pcmcia_device *p_dev) 565 { 566 cistpl_manfid_t manf_id; 567 cistpl_funcid_t func_id; 568 cistpl_vers_1_t *vers1; 569 unsigned int i; 570 571 vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL); 572 if (!vers1) 573 return -ENOMEM; 574 575 if (!pccard_read_tuple(p_dev->socket, p_dev->func, 576 CISTPL_MANFID, &manf_id)) { 577 p_dev->manf_id = manf_id.manf; 578 p_dev->card_id = manf_id.card; 579 p_dev->has_manf_id = 1; 580 p_dev->has_card_id = 1; 581 } 582 583 if (!pccard_read_tuple(p_dev->socket, p_dev->func, 584 CISTPL_FUNCID, &func_id)) { 585 p_dev->func_id = func_id.func; 586 p_dev->has_func_id = 1; 587 } else { 588 /* rule of thumb: cards with no FUNCID, but with 589 * common memory device geometry information, are 590 * probably memory cards (from pcmcia-cs) */ 591 cistpl_device_geo_t *devgeo; 592 593 devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL); 594 if (!devgeo) { 595 kfree(vers1); 596 return -ENOMEM; 597 } 598 if (!pccard_read_tuple(p_dev->socket, p_dev->func, 599 CISTPL_DEVICE_GEO, devgeo)) { 600 ds_dbg(0, "mem device geometry probably means " 601 "FUNCID_MEMORY\n"); 602 p_dev->func_id = CISTPL_FUNCID_MEMORY; 603 p_dev->has_func_id = 1; 604 } 605 kfree(devgeo); 606 } 607 608 if (!pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_VERS_1, 609 vers1)) { 610 for (i=0; i < vers1->ns; i++) { 611 char *tmp; 612 unsigned int length; 613 614 tmp = vers1->str + vers1->ofs[i]; 615 616 length = strlen(tmp) + 1; 617 if ((length < 2) || (length > 255)) 618 continue; 619 620 p_dev->prod_id[i] = kmalloc(sizeof(char) * length, 621 GFP_KERNEL); 622 if (!p_dev->prod_id[i]) 623 continue; 624 625 p_dev->prod_id[i] = strncpy(p_dev->prod_id[i], 626 tmp, length); 627 } 628 } 629 630 kfree(vers1); 631 return 0; 632 } 633 634 635 /* device_add_lock is needed to avoid double registration by cardmgr and kernel. 636 * Serializes pcmcia_device_add; will most likely be removed in future. 637 * 638 * While it has the caveat that adding new PCMCIA devices inside(!) device_register() 639 * won't work, this doesn't matter much at the moment: the driver core doesn't 640 * support it either. 641 */ 642 static DEFINE_MUTEX(device_add_lock); 643 644 struct pcmcia_device * pcmcia_device_add(struct pcmcia_socket *s, unsigned int function) 645 { 646 struct pcmcia_device *p_dev, *tmp_dev; 647 unsigned long flags; 648 int bus_id_len; 649 650 s = pcmcia_get_socket(s); 651 if (!s) 652 return NULL; 653 654 mutex_lock(&device_add_lock); 655 656 ds_dbg(3, "adding device to %d, function %d\n", s->sock, function); 657 658 /* max of 4 devices per card */ 659 if (s->device_count == 4) 660 goto err_put; 661 662 p_dev = kzalloc(sizeof(struct pcmcia_device), GFP_KERNEL); 663 if (!p_dev) 664 goto err_put; 665 666 p_dev->socket = s; 667 p_dev->device_no = (s->device_count++); 668 p_dev->func = function; 669 670 p_dev->dev.bus = &pcmcia_bus_type; 671 p_dev->dev.parent = s->dev.parent; 672 p_dev->dev.release = pcmcia_release_dev; 673 bus_id_len = sprintf (p_dev->dev.bus_id, "%d.%d", p_dev->socket->sock, p_dev->device_no); 674 675 p_dev->devname = kmalloc(6 + bus_id_len + 1, GFP_KERNEL); 676 if (!p_dev->devname) 677 goto err_free; 678 sprintf (p_dev->devname, "pcmcia%s", p_dev->dev.bus_id); 679 ds_dbg(3, "devname is %s\n", p_dev->devname); 680 681 spin_lock_irqsave(&pcmcia_dev_list_lock, flags); 682 683 /* 684 * p_dev->function_config must be the same for all card functions. 685 * Note that this is serialized by the device_add_lock, so that 686 * only one such struct will be created. 687 */ 688 list_for_each_entry(tmp_dev, &s->devices_list, socket_device_list) 689 if (p_dev->func == tmp_dev->func) { 690 p_dev->function_config = tmp_dev->function_config; 691 kref_get(&p_dev->function_config->ref); 692 } 693 694 /* Add to the list in pcmcia_bus_socket */ 695 list_add(&p_dev->socket_device_list, &s->devices_list); 696 697 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags); 698 699 if (!p_dev->function_config) { 700 ds_dbg(3, "creating config_t for %s\n", p_dev->dev.bus_id); 701 p_dev->function_config = kzalloc(sizeof(struct config_t), 702 GFP_KERNEL); 703 if (!p_dev->function_config) 704 goto err_unreg; 705 kref_init(&p_dev->function_config->ref); 706 } 707 708 printk(KERN_NOTICE "pcmcia: registering new device %s\n", 709 p_dev->devname); 710 711 pcmcia_device_query(p_dev); 712 713 if (device_register(&p_dev->dev)) 714 goto err_unreg; 715 716 mutex_unlock(&device_add_lock); 717 718 return p_dev; 719 720 err_unreg: 721 spin_lock_irqsave(&pcmcia_dev_list_lock, flags); 722 list_del(&p_dev->socket_device_list); 723 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags); 724 725 err_free: 726 kfree(p_dev->devname); 727 kfree(p_dev); 728 s->device_count--; 729 err_put: 730 mutex_unlock(&device_add_lock); 731 pcmcia_put_socket(s); 732 733 return NULL; 734 } 735 736 737 static int pcmcia_card_add(struct pcmcia_socket *s) 738 { 739 cisinfo_t cisinfo; 740 cistpl_longlink_mfc_t mfc; 741 unsigned int no_funcs, i; 742 int ret = 0; 743 744 if (!(s->resource_setup_done)) { 745 ds_dbg(3, "no resources available, delaying card_add\n"); 746 return -EAGAIN; /* try again, but later... */ 747 } 748 749 if (pcmcia_validate_mem(s)) { 750 ds_dbg(3, "validating mem resources failed, " 751 "delaying card_add\n"); 752 return -EAGAIN; /* try again, but later... */ 753 } 754 755 ret = pccard_validate_cis(s, BIND_FN_ALL, &cisinfo); 756 if (ret || !cisinfo.Chains) { 757 ds_dbg(0, "invalid CIS or invalid resources\n"); 758 return -ENODEV; 759 } 760 761 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc)) 762 no_funcs = mfc.nfn; 763 else 764 no_funcs = 1; 765 s->functions = no_funcs; 766 767 for (i=0; i < no_funcs; i++) 768 pcmcia_device_add(s, i); 769 770 return (ret); 771 } 772 773 774 static void pcmcia_delayed_add_device(struct work_struct *work) 775 { 776 struct pcmcia_socket *s = 777 container_of(work, struct pcmcia_socket, device_add); 778 ds_dbg(1, "adding additional device to %d\n", s->sock); 779 pcmcia_device_add(s, s->pcmcia_state.mfc_pfc); 780 s->pcmcia_state.device_add_pending = 0; 781 s->pcmcia_state.mfc_pfc = 0; 782 } 783 784 static int pcmcia_requery(struct device *dev, void * _data) 785 { 786 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 787 if (!p_dev->dev.driver) { 788 ds_dbg(1, "update device information for %s\n", 789 p_dev->dev.bus_id); 790 pcmcia_device_query(p_dev); 791 } 792 793 return 0; 794 } 795 796 static void pcmcia_bus_rescan(struct pcmcia_socket *skt, int new_cis) 797 { 798 int no_devices = 0; 799 int ret = 0; 800 unsigned long flags; 801 802 /* must be called with skt_mutex held */ 803 ds_dbg(0, "re-scanning socket %d\n", skt->sock); 804 805 spin_lock_irqsave(&pcmcia_dev_list_lock, flags); 806 if (list_empty(&skt->devices_list)) 807 no_devices = 1; 808 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags); 809 810 /* If this is because of a CIS override, start over */ 811 if (new_cis && !no_devices) 812 pcmcia_card_remove(skt, NULL); 813 814 /* if no devices were added for this socket yet because of 815 * missing resource information or other trouble, we need to 816 * do this now. */ 817 if (no_devices || new_cis) { 818 ret = pcmcia_card_add(skt); 819 if (ret) 820 return; 821 } 822 823 /* some device information might have changed because of a CIS 824 * update or because we can finally read it correctly... so 825 * determine it again, overwriting old values if necessary. */ 826 bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery); 827 828 /* we re-scan all devices, not just the ones connected to this 829 * socket. This does not matter, though. */ 830 ret = bus_rescan_devices(&pcmcia_bus_type); 831 if (ret) 832 printk(KERN_INFO "pcmcia: bus_rescan_devices failed\n"); 833 } 834 835 #ifdef CONFIG_PCMCIA_LOAD_CIS 836 837 /** 838 * pcmcia_load_firmware - load CIS from userspace if device-provided is broken 839 * @dev - the pcmcia device which needs a CIS override 840 * @filename - requested filename in /lib/firmware/ 841 * 842 * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if 843 * the one provided by the card is broken. The firmware files reside in 844 * /lib/firmware/ in userspace. 845 */ 846 static int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename) 847 { 848 struct pcmcia_socket *s = dev->socket; 849 const struct firmware *fw; 850 char path[20]; 851 int ret = -ENOMEM; 852 int no_funcs; 853 int old_funcs; 854 cisdump_t *cis; 855 cistpl_longlink_mfc_t mfc; 856 857 if (!filename) 858 return -EINVAL; 859 860 ds_dbg(1, "trying to load CIS file %s\n", filename); 861 862 if (strlen(filename) > 14) { 863 printk(KERN_WARNING "pcmcia: CIS filename is too long\n"); 864 return -EINVAL; 865 } 866 867 snprintf(path, 20, "%s", filename); 868 869 if (request_firmware(&fw, path, &dev->dev) == 0) { 870 if (fw->size >= CISTPL_MAX_CIS_SIZE) { 871 ret = -EINVAL; 872 printk(KERN_ERR "pcmcia: CIS override is too big\n"); 873 goto release; 874 } 875 876 cis = kzalloc(sizeof(cisdump_t), GFP_KERNEL); 877 if (!cis) { 878 ret = -ENOMEM; 879 goto release; 880 } 881 882 cis->Length = fw->size + 1; 883 memcpy(cis->Data, fw->data, fw->size); 884 885 if (!pcmcia_replace_cis(s, cis)) 886 ret = 0; 887 else { 888 printk(KERN_ERR "pcmcia: CIS override failed\n"); 889 goto release; 890 } 891 892 893 /* update information */ 894 pcmcia_device_query(dev); 895 896 /* does this cis override add or remove functions? */ 897 old_funcs = s->functions; 898 899 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc)) 900 no_funcs = mfc.nfn; 901 else 902 no_funcs = 1; 903 s->functions = no_funcs; 904 905 if (old_funcs > no_funcs) 906 pcmcia_card_remove(s, dev); 907 else if (no_funcs > old_funcs) 908 pcmcia_add_device_later(s, 1); 909 } 910 release: 911 release_firmware(fw); 912 913 return (ret); 914 } 915 916 #else /* !CONFIG_PCMCIA_LOAD_CIS */ 917 918 static inline int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename) 919 { 920 return -ENODEV; 921 } 922 923 #endif 924 925 926 static inline int pcmcia_devmatch(struct pcmcia_device *dev, 927 struct pcmcia_device_id *did) 928 { 929 if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) { 930 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id)) 931 return 0; 932 } 933 934 if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) { 935 if ((!dev->has_card_id) || (dev->card_id != did->card_id)) 936 return 0; 937 } 938 939 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) { 940 if (dev->func != did->function) 941 return 0; 942 } 943 944 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) { 945 if (!dev->prod_id[0]) 946 return 0; 947 if (strcmp(did->prod_id[0], dev->prod_id[0])) 948 return 0; 949 } 950 951 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) { 952 if (!dev->prod_id[1]) 953 return 0; 954 if (strcmp(did->prod_id[1], dev->prod_id[1])) 955 return 0; 956 } 957 958 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) { 959 if (!dev->prod_id[2]) 960 return 0; 961 if (strcmp(did->prod_id[2], dev->prod_id[2])) 962 return 0; 963 } 964 965 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) { 966 if (!dev->prod_id[3]) 967 return 0; 968 if (strcmp(did->prod_id[3], dev->prod_id[3])) 969 return 0; 970 } 971 972 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) { 973 if (dev->device_no != did->device_no) 974 return 0; 975 } 976 977 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) { 978 if ((!dev->has_func_id) || (dev->func_id != did->func_id)) 979 return 0; 980 981 /* if this is a pseudo-multi-function device, 982 * we need explicit matches */ 983 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) 984 return 0; 985 if (dev->device_no) 986 return 0; 987 988 /* also, FUNC_ID matching needs to be activated by userspace 989 * after it has re-checked that there is no possible module 990 * with a prod_id/manf_id/card_id match. 991 */ 992 ds_dbg(0, "skipping FUNC_ID match for %s until userspace " 993 "interaction\n", dev->dev.bus_id); 994 if (!dev->allow_func_id_match) 995 return 0; 996 } 997 998 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) { 999 ds_dbg(0, "device %s needs a fake CIS\n", dev->dev.bus_id); 1000 if (!dev->socket->fake_cis) 1001 pcmcia_load_firmware(dev, did->cisfile); 1002 1003 if (!dev->socket->fake_cis) 1004 return 0; 1005 } 1006 1007 if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) { 1008 int i; 1009 for (i=0; i<4; i++) 1010 if (dev->prod_id[i]) 1011 return 0; 1012 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id) 1013 return 0; 1014 } 1015 1016 dev->dev.driver_data = (void *) did; 1017 1018 return 1; 1019 } 1020 1021 1022 static int pcmcia_bus_match(struct device * dev, struct device_driver * drv) { 1023 struct pcmcia_device * p_dev = to_pcmcia_dev(dev); 1024 struct pcmcia_driver * p_drv = to_pcmcia_drv(drv); 1025 struct pcmcia_device_id *did = p_drv->id_table; 1026 struct pcmcia_dynid *dynid; 1027 1028 /* match dynamic devices first */ 1029 spin_lock(&p_drv->dynids.lock); 1030 list_for_each_entry(dynid, &p_drv->dynids.list, node) { 1031 ds_dbg(3, "trying to match %s to %s\n", dev->bus_id, 1032 drv->name); 1033 if (pcmcia_devmatch(p_dev, &dynid->id)) { 1034 ds_dbg(0, "matched %s to %s\n", dev->bus_id, 1035 drv->name); 1036 spin_unlock(&p_drv->dynids.lock); 1037 return 1; 1038 } 1039 } 1040 spin_unlock(&p_drv->dynids.lock); 1041 1042 #ifdef CONFIG_PCMCIA_IOCTL 1043 /* matching by cardmgr */ 1044 if (p_dev->cardmgr == p_drv) { 1045 ds_dbg(0, "cardmgr matched %s to %s\n", dev->bus_id, 1046 drv->name); 1047 return 1; 1048 } 1049 #endif 1050 1051 while (did && did->match_flags) { 1052 ds_dbg(3, "trying to match %s to %s\n", dev->bus_id, 1053 drv->name); 1054 if (pcmcia_devmatch(p_dev, did)) { 1055 ds_dbg(0, "matched %s to %s\n", dev->bus_id, 1056 drv->name); 1057 return 1; 1058 } 1059 did++; 1060 } 1061 1062 return 0; 1063 } 1064 1065 #ifdef CONFIG_HOTPLUG 1066 1067 static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env) 1068 { 1069 struct pcmcia_device *p_dev; 1070 int i; 1071 u32 hash[4] = { 0, 0, 0, 0}; 1072 1073 if (!dev) 1074 return -ENODEV; 1075 1076 p_dev = to_pcmcia_dev(dev); 1077 1078 /* calculate hashes */ 1079 for (i=0; i<4; i++) { 1080 if (!p_dev->prod_id[i]) 1081 continue; 1082 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i])); 1083 } 1084 1085 if (add_uevent_var(env, "SOCKET_NO=%u", p_dev->socket->sock)) 1086 return -ENOMEM; 1087 1088 if (add_uevent_var(env, "DEVICE_NO=%02X", p_dev->device_no)) 1089 return -ENOMEM; 1090 1091 if (add_uevent_var(env, "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X" 1092 "pa%08Xpb%08Xpc%08Xpd%08X", 1093 p_dev->has_manf_id ? p_dev->manf_id : 0, 1094 p_dev->has_card_id ? p_dev->card_id : 0, 1095 p_dev->has_func_id ? p_dev->func_id : 0, 1096 p_dev->func, 1097 p_dev->device_no, 1098 hash[0], 1099 hash[1], 1100 hash[2], 1101 hash[3])) 1102 return -ENOMEM; 1103 1104 return 0; 1105 } 1106 1107 #else 1108 1109 static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env) 1110 { 1111 return -ENODEV; 1112 } 1113 1114 #endif 1115 1116 /************************ runtime PM support ***************************/ 1117 1118 static int pcmcia_dev_suspend(struct device *dev, pm_message_t state); 1119 static int pcmcia_dev_resume(struct device *dev); 1120 1121 static int runtime_suspend(struct device *dev) 1122 { 1123 int rc; 1124 1125 down(&dev->sem); 1126 rc = pcmcia_dev_suspend(dev, PMSG_SUSPEND); 1127 up(&dev->sem); 1128 if (!rc) 1129 dev->power.power_state.event = PM_EVENT_SUSPEND; 1130 return rc; 1131 } 1132 1133 static void runtime_resume(struct device *dev) 1134 { 1135 int rc; 1136 1137 down(&dev->sem); 1138 rc = pcmcia_dev_resume(dev); 1139 up(&dev->sem); 1140 if (!rc) 1141 dev->power.power_state.event = PM_EVENT_ON; 1142 } 1143 1144 /************************ per-device sysfs output ***************************/ 1145 1146 #define pcmcia_device_attr(field, test, format) \ 1147 static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf) \ 1148 { \ 1149 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \ 1150 return p_dev->test ? sprintf (buf, format, p_dev->field) : -ENODEV; \ 1151 } 1152 1153 #define pcmcia_device_stringattr(name, field) \ 1154 static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf) \ 1155 { \ 1156 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \ 1157 return p_dev->field ? sprintf (buf, "%s\n", p_dev->field) : -ENODEV; \ 1158 } 1159 1160 pcmcia_device_attr(func, socket, "0x%02x\n"); 1161 pcmcia_device_attr(func_id, has_func_id, "0x%02x\n"); 1162 pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n"); 1163 pcmcia_device_attr(card_id, has_card_id, "0x%04x\n"); 1164 pcmcia_device_stringattr(prod_id1, prod_id[0]); 1165 pcmcia_device_stringattr(prod_id2, prod_id[1]); 1166 pcmcia_device_stringattr(prod_id3, prod_id[2]); 1167 pcmcia_device_stringattr(prod_id4, prod_id[3]); 1168 1169 1170 static ssize_t pcmcia_show_pm_state(struct device *dev, struct device_attribute *attr, char *buf) 1171 { 1172 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1173 1174 if (p_dev->suspended) 1175 return sprintf(buf, "off\n"); 1176 else 1177 return sprintf(buf, "on\n"); 1178 } 1179 1180 static ssize_t pcmcia_store_pm_state(struct device *dev, struct device_attribute *attr, 1181 const char *buf, size_t count) 1182 { 1183 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1184 int ret = 0; 1185 1186 if (!count) 1187 return -EINVAL; 1188 1189 if ((!p_dev->suspended) && !strncmp(buf, "off", 3)) 1190 ret = runtime_suspend(dev); 1191 else if (p_dev->suspended && !strncmp(buf, "on", 2)) 1192 runtime_resume(dev); 1193 1194 return ret ? ret : count; 1195 } 1196 1197 1198 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf) 1199 { 1200 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1201 int i; 1202 u32 hash[4] = { 0, 0, 0, 0}; 1203 1204 /* calculate hashes */ 1205 for (i=0; i<4; i++) { 1206 if (!p_dev->prod_id[i]) 1207 continue; 1208 hash[i] = crc32(0,p_dev->prod_id[i],strlen(p_dev->prod_id[i])); 1209 } 1210 return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X" 1211 "pa%08Xpb%08Xpc%08Xpd%08X\n", 1212 p_dev->has_manf_id ? p_dev->manf_id : 0, 1213 p_dev->has_card_id ? p_dev->card_id : 0, 1214 p_dev->has_func_id ? p_dev->func_id : 0, 1215 p_dev->func, p_dev->device_no, 1216 hash[0], hash[1], hash[2], hash[3]); 1217 } 1218 1219 static ssize_t pcmcia_store_allow_func_id_match(struct device *dev, 1220 struct device_attribute *attr, const char *buf, size_t count) 1221 { 1222 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1223 int ret; 1224 1225 if (!count) 1226 return -EINVAL; 1227 1228 mutex_lock(&p_dev->socket->skt_mutex); 1229 p_dev->allow_func_id_match = 1; 1230 mutex_unlock(&p_dev->socket->skt_mutex); 1231 1232 ret = bus_rescan_devices(&pcmcia_bus_type); 1233 if (ret) 1234 printk(KERN_INFO "pcmcia: bus_rescan_devices failed after " 1235 "allowing func_id matches\n"); 1236 1237 return count; 1238 } 1239 1240 static struct device_attribute pcmcia_dev_attrs[] = { 1241 __ATTR(function, 0444, func_show, NULL), 1242 __ATTR(pm_state, 0644, pcmcia_show_pm_state, pcmcia_store_pm_state), 1243 __ATTR_RO(func_id), 1244 __ATTR_RO(manf_id), 1245 __ATTR_RO(card_id), 1246 __ATTR_RO(prod_id1), 1247 __ATTR_RO(prod_id2), 1248 __ATTR_RO(prod_id3), 1249 __ATTR_RO(prod_id4), 1250 __ATTR_RO(modalias), 1251 __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match), 1252 __ATTR_NULL, 1253 }; 1254 1255 /* PM support, also needed for reset */ 1256 1257 static int pcmcia_dev_suspend(struct device * dev, pm_message_t state) 1258 { 1259 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1260 struct pcmcia_driver *p_drv = NULL; 1261 int ret = 0; 1262 1263 ds_dbg(2, "suspending %s\n", dev->bus_id); 1264 1265 if (dev->driver) 1266 p_drv = to_pcmcia_drv(dev->driver); 1267 1268 if (!p_drv) 1269 goto out; 1270 1271 if (p_drv->suspend) { 1272 ret = p_drv->suspend(p_dev); 1273 if (ret) { 1274 printk(KERN_ERR "pcmcia: device %s (driver %s) did " 1275 "not want to go to sleep (%d)\n", 1276 p_dev->devname, p_drv->drv.name, ret); 1277 goto out; 1278 } 1279 } 1280 1281 if (p_dev->device_no == p_dev->func) { 1282 ds_dbg(2, "releasing configuration for %s\n", dev->bus_id); 1283 pcmcia_release_configuration(p_dev); 1284 } 1285 1286 out: 1287 if (!ret) 1288 p_dev->suspended = 1; 1289 return ret; 1290 } 1291 1292 1293 static int pcmcia_dev_resume(struct device * dev) 1294 { 1295 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1296 struct pcmcia_driver *p_drv = NULL; 1297 int ret = 0; 1298 1299 ds_dbg(2, "resuming %s\n", dev->bus_id); 1300 1301 if (dev->driver) 1302 p_drv = to_pcmcia_drv(dev->driver); 1303 1304 if (!p_drv) 1305 goto out; 1306 1307 if (p_dev->device_no == p_dev->func) { 1308 ds_dbg(2, "requesting configuration for %s\n", dev->bus_id); 1309 ret = pcmcia_request_configuration(p_dev, &p_dev->conf); 1310 if (ret) 1311 goto out; 1312 } 1313 1314 if (p_drv->resume) 1315 ret = p_drv->resume(p_dev); 1316 1317 out: 1318 if (!ret) 1319 p_dev->suspended = 0; 1320 return ret; 1321 } 1322 1323 1324 static int pcmcia_bus_suspend_callback(struct device *dev, void * _data) 1325 { 1326 struct pcmcia_socket *skt = _data; 1327 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1328 1329 if (p_dev->socket != skt || p_dev->suspended) 1330 return 0; 1331 1332 return runtime_suspend(dev); 1333 } 1334 1335 static int pcmcia_bus_resume_callback(struct device *dev, void * _data) 1336 { 1337 struct pcmcia_socket *skt = _data; 1338 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1339 1340 if (p_dev->socket != skt || !p_dev->suspended) 1341 return 0; 1342 1343 runtime_resume(dev); 1344 1345 return 0; 1346 } 1347 1348 static int pcmcia_bus_resume(struct pcmcia_socket *skt) 1349 { 1350 ds_dbg(2, "resuming socket %d\n", skt->sock); 1351 bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback); 1352 return 0; 1353 } 1354 1355 static int pcmcia_bus_suspend(struct pcmcia_socket *skt) 1356 { 1357 ds_dbg(2, "suspending socket %d\n", skt->sock); 1358 if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt, 1359 pcmcia_bus_suspend_callback)) { 1360 pcmcia_bus_resume(skt); 1361 return -EIO; 1362 } 1363 return 0; 1364 } 1365 1366 1367 /*====================================================================== 1368 1369 The card status event handler. 1370 1371 ======================================================================*/ 1372 1373 /* Normally, the event is passed to individual drivers after 1374 * informing userspace. Only for CS_EVENT_CARD_REMOVAL this 1375 * is inversed to maintain historic compatibility. 1376 */ 1377 1378 static int ds_event(struct pcmcia_socket *skt, event_t event, int priority) 1379 { 1380 struct pcmcia_socket *s = pcmcia_get_socket(skt); 1381 1382 if (!s) { 1383 printk(KERN_ERR "PCMCIA obtaining reference to socket %p " \ 1384 "failed, event 0x%x lost!\n", skt, event); 1385 return -ENODEV; 1386 } 1387 1388 ds_dbg(1, "ds_event(0x%06x, %d, 0x%p)\n", 1389 event, priority, skt); 1390 1391 switch (event) { 1392 case CS_EVENT_CARD_REMOVAL: 1393 s->pcmcia_state.present = 0; 1394 pcmcia_card_remove(skt, NULL); 1395 handle_event(skt, event); 1396 break; 1397 1398 case CS_EVENT_CARD_INSERTION: 1399 s->pcmcia_state.present = 1; 1400 pcmcia_card_add(skt); 1401 handle_event(skt, event); 1402 break; 1403 1404 case CS_EVENT_EJECTION_REQUEST: 1405 break; 1406 1407 case CS_EVENT_PM_SUSPEND: 1408 case CS_EVENT_PM_RESUME: 1409 case CS_EVENT_RESET_PHYSICAL: 1410 case CS_EVENT_CARD_RESET: 1411 default: 1412 handle_event(skt, event); 1413 break; 1414 } 1415 1416 pcmcia_put_socket(s); 1417 1418 return 0; 1419 } /* ds_event */ 1420 1421 1422 struct pcmcia_device * pcmcia_dev_present(struct pcmcia_device *_p_dev) 1423 { 1424 struct pcmcia_device *p_dev; 1425 struct pcmcia_device *ret = NULL; 1426 1427 p_dev = pcmcia_get_dev(_p_dev); 1428 if (!p_dev) 1429 return NULL; 1430 1431 if (!p_dev->socket->pcmcia_state.present) 1432 goto out; 1433 1434 if (p_dev->_removed) 1435 goto out; 1436 1437 if (p_dev->suspended) 1438 goto out; 1439 1440 ret = p_dev; 1441 out: 1442 pcmcia_put_dev(p_dev); 1443 return ret; 1444 } 1445 EXPORT_SYMBOL(pcmcia_dev_present); 1446 1447 1448 static struct pcmcia_callback pcmcia_bus_callback = { 1449 .owner = THIS_MODULE, 1450 .event = ds_event, 1451 .requery = pcmcia_bus_rescan, 1452 .suspend = pcmcia_bus_suspend, 1453 .resume = pcmcia_bus_resume, 1454 }; 1455 1456 static int __devinit pcmcia_bus_add_socket(struct device *dev, 1457 struct class_interface *class_intf) 1458 { 1459 struct pcmcia_socket *socket = dev_get_drvdata(dev); 1460 int ret; 1461 1462 socket = pcmcia_get_socket(socket); 1463 if (!socket) { 1464 printk(KERN_ERR "PCMCIA obtaining reference to socket %p failed\n", socket); 1465 return -ENODEV; 1466 } 1467 1468 /* 1469 * Ugly. But we want to wait for the socket threads to have started up. 1470 * We really should let the drivers themselves drive some of this.. 1471 */ 1472 msleep(250); 1473 1474 #ifdef CONFIG_PCMCIA_IOCTL 1475 init_waitqueue_head(&socket->queue); 1476 #endif 1477 INIT_LIST_HEAD(&socket->devices_list); 1478 INIT_WORK(&socket->device_add, pcmcia_delayed_add_device); 1479 memset(&socket->pcmcia_state, 0, sizeof(u8)); 1480 socket->device_count = 0; 1481 1482 ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback); 1483 if (ret) { 1484 printk(KERN_ERR "PCMCIA registration PCCard core failed for socket %p\n", socket); 1485 pcmcia_put_socket(socket); 1486 return (ret); 1487 } 1488 1489 return 0; 1490 } 1491 1492 static void pcmcia_bus_remove_socket(struct device *dev, 1493 struct class_interface *class_intf) 1494 { 1495 struct pcmcia_socket *socket = dev_get_drvdata(dev); 1496 1497 if (!socket) 1498 return; 1499 1500 socket->pcmcia_state.dead = 1; 1501 pccard_register_pcmcia(socket, NULL); 1502 1503 /* unregister any unbound devices */ 1504 mutex_lock(&socket->skt_mutex); 1505 pcmcia_card_remove(socket, NULL); 1506 mutex_unlock(&socket->skt_mutex); 1507 1508 pcmcia_put_socket(socket); 1509 1510 return; 1511 } 1512 1513 1514 /* the pcmcia_bus_interface is used to handle pcmcia socket devices */ 1515 static struct class_interface pcmcia_bus_interface = { 1516 .class = &pcmcia_socket_class, 1517 .add_dev = &pcmcia_bus_add_socket, 1518 .remove_dev = &pcmcia_bus_remove_socket, 1519 }; 1520 1521 1522 struct bus_type pcmcia_bus_type = { 1523 .name = "pcmcia", 1524 .uevent = pcmcia_bus_uevent, 1525 .match = pcmcia_bus_match, 1526 .dev_attrs = pcmcia_dev_attrs, 1527 .probe = pcmcia_device_probe, 1528 .remove = pcmcia_device_remove, 1529 .suspend = pcmcia_dev_suspend, 1530 .resume = pcmcia_dev_resume, 1531 }; 1532 1533 1534 static int __init init_pcmcia_bus(void) 1535 { 1536 int ret; 1537 1538 spin_lock_init(&pcmcia_dev_list_lock); 1539 1540 ret = bus_register(&pcmcia_bus_type); 1541 if (ret < 0) { 1542 printk(KERN_WARNING "pcmcia: bus_register error: %d\n", ret); 1543 return ret; 1544 } 1545 ret = class_interface_register(&pcmcia_bus_interface); 1546 if (ret < 0) { 1547 printk(KERN_WARNING 1548 "pcmcia: class_interface_register error: %d\n", ret); 1549 bus_unregister(&pcmcia_bus_type); 1550 return ret; 1551 } 1552 1553 pcmcia_setup_ioctl(); 1554 1555 return 0; 1556 } 1557 fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that 1558 * pcmcia_socket_class is already registered */ 1559 1560 1561 static void __exit exit_pcmcia_bus(void) 1562 { 1563 pcmcia_cleanup_ioctl(); 1564 1565 class_interface_unregister(&pcmcia_bus_interface); 1566 1567 bus_unregister(&pcmcia_bus_type); 1568 } 1569 module_exit(exit_pcmcia_bus); 1570 1571 1572 MODULE_ALIAS("ds"); 1573