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 #include <linux/dma-mapping.h> 27 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 = driver_create_file(&drv->drv, &driver_attr_new_id); 315 return error; 316 } 317 318 319 /** 320 * pcmcia_register_driver - register a PCMCIA driver with the bus core 321 * @driver: the &driver being registered 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 * @driver: the &driver being unregistered 357 */ 358 void pcmcia_unregister_driver(struct pcmcia_driver *driver) 359 { 360 ds_dbg(3, "unregistering driver %s\n", driver->drv.name); 361 driver_unregister(&driver->drv); 362 pcmcia_free_dynids(driver); 363 } 364 EXPORT_SYMBOL(pcmcia_unregister_driver); 365 366 367 /* pcmcia_device handling */ 368 369 struct pcmcia_device * pcmcia_get_dev(struct pcmcia_device *p_dev) 370 { 371 struct device *tmp_dev; 372 tmp_dev = get_device(&p_dev->dev); 373 if (!tmp_dev) 374 return NULL; 375 return to_pcmcia_dev(tmp_dev); 376 } 377 378 void pcmcia_put_dev(struct pcmcia_device *p_dev) 379 { 380 if (p_dev) 381 put_device(&p_dev->dev); 382 } 383 384 static void pcmcia_release_function(struct kref *ref) 385 { 386 struct config_t *c = container_of(ref, struct config_t, ref); 387 ds_dbg(1, "releasing config_t\n"); 388 kfree(c); 389 } 390 391 static void pcmcia_release_dev(struct device *dev) 392 { 393 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 394 ds_dbg(1, "releasing device %s\n", p_dev->dev.bus_id); 395 pcmcia_put_socket(p_dev->socket); 396 kfree(p_dev->devname); 397 kref_put(&p_dev->function_config->ref, pcmcia_release_function); 398 kfree(p_dev); 399 } 400 401 static void pcmcia_add_device_later(struct pcmcia_socket *s, int mfc) 402 { 403 if (!s->pcmcia_state.device_add_pending) { 404 ds_dbg(1, "scheduling to add %s secondary" 405 " device to %d\n", mfc ? "mfc" : "pfc", s->sock); 406 s->pcmcia_state.device_add_pending = 1; 407 s->pcmcia_state.mfc_pfc = mfc; 408 schedule_work(&s->device_add); 409 } 410 return; 411 } 412 413 static int pcmcia_device_probe(struct device * dev) 414 { 415 struct pcmcia_device *p_dev; 416 struct pcmcia_driver *p_drv; 417 struct pcmcia_device_id *did; 418 struct pcmcia_socket *s; 419 cistpl_config_t cis_config; 420 int ret = 0; 421 422 dev = get_device(dev); 423 if (!dev) 424 return -ENODEV; 425 426 p_dev = to_pcmcia_dev(dev); 427 p_drv = to_pcmcia_drv(dev->driver); 428 s = p_dev->socket; 429 430 /* The PCMCIA code passes the match data in via dev->driver_data 431 * which is an ugly hack. Once the driver probe is called it may 432 * and often will overwrite the match data so we must save it first 433 * 434 * handle pseudo multifunction devices: 435 * there are at most two pseudo multifunction devices. 436 * if we're matching against the first, schedule a 437 * call which will then check whether there are two 438 * pseudo devices, and if not, add the second one. 439 */ 440 did = p_dev->dev.driver_data; 441 442 ds_dbg(1, "trying to bind %s to %s\n", p_dev->dev.bus_id, 443 p_drv->drv.name); 444 445 if ((!p_drv->probe) || (!p_dev->function_config) || 446 (!try_module_get(p_drv->owner))) { 447 ret = -EINVAL; 448 goto put_dev; 449 } 450 451 /* set up some more device information */ 452 ret = pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_CONFIG, 453 &cis_config); 454 if (!ret) { 455 p_dev->conf.ConfigBase = cis_config.base; 456 p_dev->conf.Present = cis_config.rmask[0]; 457 } else { 458 printk(KERN_INFO "pcmcia: could not parse base and rmask0 of CIS\n"); 459 p_dev->conf.ConfigBase = 0; 460 p_dev->conf.Present = 0; 461 } 462 463 ret = p_drv->probe(p_dev); 464 if (ret) { 465 ds_dbg(1, "binding %s to %s failed with %d\n", 466 p_dev->dev.bus_id, p_drv->drv.name, ret); 467 goto put_module; 468 } 469 470 if (did && (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) && 471 (p_dev->socket->device_count == 1) && (p_dev->device_no == 0)) 472 pcmcia_add_device_later(p_dev->socket, 0); 473 474 put_module: 475 if (ret) 476 module_put(p_drv->owner); 477 put_dev: 478 if (ret) 479 put_device(dev); 480 return (ret); 481 } 482 483 484 /* 485 * Removes a PCMCIA card from the device tree and socket list. 486 */ 487 static void pcmcia_card_remove(struct pcmcia_socket *s, struct pcmcia_device *leftover) 488 { 489 struct pcmcia_device *p_dev; 490 struct pcmcia_device *tmp; 491 unsigned long flags; 492 493 ds_dbg(2, "pcmcia_card_remove(%d) %s\n", s->sock, 494 leftover ? leftover->devname : ""); 495 496 if (!leftover) 497 s->device_count = 0; 498 else 499 s->device_count = 1; 500 501 /* unregister all pcmcia_devices registered with this socket, except leftover */ 502 list_for_each_entry_safe(p_dev, tmp, &s->devices_list, socket_device_list) { 503 if (p_dev == leftover) 504 continue; 505 506 spin_lock_irqsave(&pcmcia_dev_list_lock, flags); 507 list_del(&p_dev->socket_device_list); 508 p_dev->_removed=1; 509 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags); 510 511 ds_dbg(2, "unregistering device %s\n", p_dev->dev.bus_id); 512 device_unregister(&p_dev->dev); 513 } 514 515 return; 516 } 517 518 static int pcmcia_device_remove(struct device * dev) 519 { 520 struct pcmcia_device *p_dev; 521 struct pcmcia_driver *p_drv; 522 struct pcmcia_device_id *did; 523 int i; 524 525 p_dev = to_pcmcia_dev(dev); 526 p_drv = to_pcmcia_drv(dev->driver); 527 528 ds_dbg(1, "removing device %s\n", p_dev->dev.bus_id); 529 530 /* If we're removing the primary module driving a 531 * pseudo multi-function card, we need to unbind 532 * all devices 533 */ 534 did = p_dev->dev.driver_data; 535 if (did && (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) && 536 (p_dev->socket->device_count != 0) && 537 (p_dev->device_no == 0)) 538 pcmcia_card_remove(p_dev->socket, p_dev); 539 540 /* detach the "instance" */ 541 if (!p_drv) 542 return 0; 543 544 if (p_drv->remove) 545 p_drv->remove(p_dev); 546 547 p_dev->dev_node = NULL; 548 549 /* check for proper unloading */ 550 if (p_dev->_irq || p_dev->_io || p_dev->_locked) 551 printk(KERN_INFO "pcmcia: driver %s did not release config properly\n", 552 p_drv->drv.name); 553 554 for (i = 0; i < MAX_WIN; i++) 555 if (p_dev->_win & CLIENT_WIN_REQ(i)) 556 printk(KERN_INFO "pcmcia: driver %s did not release windows properly\n", 557 p_drv->drv.name); 558 559 /* references from pcmcia_probe_device */ 560 pcmcia_put_dev(p_dev); 561 module_put(p_drv->owner); 562 563 return 0; 564 } 565 566 567 /* 568 * pcmcia_device_query -- determine information about a pcmcia device 569 */ 570 static int pcmcia_device_query(struct pcmcia_device *p_dev) 571 { 572 cistpl_manfid_t manf_id; 573 cistpl_funcid_t func_id; 574 cistpl_vers_1_t *vers1; 575 unsigned int i; 576 577 vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL); 578 if (!vers1) 579 return -ENOMEM; 580 581 if (!pccard_read_tuple(p_dev->socket, p_dev->func, 582 CISTPL_MANFID, &manf_id)) { 583 p_dev->manf_id = manf_id.manf; 584 p_dev->card_id = manf_id.card; 585 p_dev->has_manf_id = 1; 586 p_dev->has_card_id = 1; 587 } 588 589 if (!pccard_read_tuple(p_dev->socket, p_dev->func, 590 CISTPL_FUNCID, &func_id)) { 591 p_dev->func_id = func_id.func; 592 p_dev->has_func_id = 1; 593 } else { 594 /* rule of thumb: cards with no FUNCID, but with 595 * common memory device geometry information, are 596 * probably memory cards (from pcmcia-cs) */ 597 cistpl_device_geo_t *devgeo; 598 599 devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL); 600 if (!devgeo) { 601 kfree(vers1); 602 return -ENOMEM; 603 } 604 if (!pccard_read_tuple(p_dev->socket, p_dev->func, 605 CISTPL_DEVICE_GEO, devgeo)) { 606 ds_dbg(0, "mem device geometry probably means " 607 "FUNCID_MEMORY\n"); 608 p_dev->func_id = CISTPL_FUNCID_MEMORY; 609 p_dev->has_func_id = 1; 610 } 611 kfree(devgeo); 612 } 613 614 if (!pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_VERS_1, 615 vers1)) { 616 for (i=0; i < vers1->ns; i++) { 617 char *tmp; 618 unsigned int length; 619 620 tmp = vers1->str + vers1->ofs[i]; 621 622 length = strlen(tmp) + 1; 623 if ((length < 2) || (length > 255)) 624 continue; 625 626 p_dev->prod_id[i] = kmalloc(sizeof(char) * length, 627 GFP_KERNEL); 628 if (!p_dev->prod_id[i]) 629 continue; 630 631 p_dev->prod_id[i] = strncpy(p_dev->prod_id[i], 632 tmp, length); 633 } 634 } 635 636 kfree(vers1); 637 return 0; 638 } 639 640 641 /* device_add_lock is needed to avoid double registration by cardmgr and kernel. 642 * Serializes pcmcia_device_add; will most likely be removed in future. 643 * 644 * While it has the caveat that adding new PCMCIA devices inside(!) device_register() 645 * won't work, this doesn't matter much at the moment: the driver core doesn't 646 * support it either. 647 */ 648 static DEFINE_MUTEX(device_add_lock); 649 650 struct pcmcia_device * pcmcia_device_add(struct pcmcia_socket *s, unsigned int function) 651 { 652 struct pcmcia_device *p_dev, *tmp_dev; 653 unsigned long flags; 654 int bus_id_len; 655 656 s = pcmcia_get_socket(s); 657 if (!s) 658 return NULL; 659 660 mutex_lock(&device_add_lock); 661 662 ds_dbg(3, "adding device to %d, function %d\n", s->sock, function); 663 664 /* max of 4 devices per card */ 665 if (s->device_count == 4) 666 goto err_put; 667 668 p_dev = kzalloc(sizeof(struct pcmcia_device), GFP_KERNEL); 669 if (!p_dev) 670 goto err_put; 671 672 p_dev->socket = s; 673 p_dev->device_no = (s->device_count++); 674 p_dev->func = function; 675 676 p_dev->dev.bus = &pcmcia_bus_type; 677 p_dev->dev.parent = s->dev.parent; 678 p_dev->dev.release = pcmcia_release_dev; 679 /* by default don't allow DMA */ 680 p_dev->dma_mask = DMA_MASK_NONE; 681 p_dev->dev.dma_mask = &p_dev->dma_mask; 682 bus_id_len = sprintf (p_dev->dev.bus_id, "%d.%d", p_dev->socket->sock, p_dev->device_no); 683 684 p_dev->devname = kmalloc(6 + bus_id_len + 1, GFP_KERNEL); 685 if (!p_dev->devname) 686 goto err_free; 687 sprintf (p_dev->devname, "pcmcia%s", p_dev->dev.bus_id); 688 ds_dbg(3, "devname is %s\n", p_dev->devname); 689 690 spin_lock_irqsave(&pcmcia_dev_list_lock, flags); 691 692 /* 693 * p_dev->function_config must be the same for all card functions. 694 * Note that this is serialized by the device_add_lock, so that 695 * only one such struct will be created. 696 */ 697 list_for_each_entry(tmp_dev, &s->devices_list, socket_device_list) 698 if (p_dev->func == tmp_dev->func) { 699 p_dev->function_config = tmp_dev->function_config; 700 kref_get(&p_dev->function_config->ref); 701 } 702 703 /* Add to the list in pcmcia_bus_socket */ 704 list_add(&p_dev->socket_device_list, &s->devices_list); 705 706 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags); 707 708 if (!p_dev->function_config) { 709 ds_dbg(3, "creating config_t for %s\n", p_dev->dev.bus_id); 710 p_dev->function_config = kzalloc(sizeof(struct config_t), 711 GFP_KERNEL); 712 if (!p_dev->function_config) 713 goto err_unreg; 714 kref_init(&p_dev->function_config->ref); 715 } 716 717 printk(KERN_NOTICE "pcmcia: registering new device %s\n", 718 p_dev->devname); 719 720 pcmcia_device_query(p_dev); 721 722 if (device_register(&p_dev->dev)) 723 goto err_unreg; 724 725 mutex_unlock(&device_add_lock); 726 727 return p_dev; 728 729 err_unreg: 730 spin_lock_irqsave(&pcmcia_dev_list_lock, flags); 731 list_del(&p_dev->socket_device_list); 732 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags); 733 734 err_free: 735 kfree(p_dev->devname); 736 kfree(p_dev); 737 s->device_count--; 738 err_put: 739 mutex_unlock(&device_add_lock); 740 pcmcia_put_socket(s); 741 742 return NULL; 743 } 744 745 746 static int pcmcia_card_add(struct pcmcia_socket *s) 747 { 748 cistpl_longlink_mfc_t mfc; 749 unsigned int no_funcs, i, no_chains; 750 int ret = 0; 751 752 if (!(s->resource_setup_done)) { 753 ds_dbg(3, "no resources available, delaying card_add\n"); 754 return -EAGAIN; /* try again, but later... */ 755 } 756 757 if (pcmcia_validate_mem(s)) { 758 ds_dbg(3, "validating mem resources failed, " 759 "delaying card_add\n"); 760 return -EAGAIN; /* try again, but later... */ 761 } 762 763 ret = pccard_validate_cis(s, BIND_FN_ALL, &no_chains); 764 if (ret || !no_chains) { 765 ds_dbg(0, "invalid CIS or invalid resources\n"); 766 return -ENODEV; 767 } 768 769 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc)) 770 no_funcs = mfc.nfn; 771 else 772 no_funcs = 1; 773 s->functions = no_funcs; 774 775 for (i=0; i < no_funcs; i++) 776 pcmcia_device_add(s, i); 777 778 return (ret); 779 } 780 781 782 static void pcmcia_delayed_add_device(struct work_struct *work) 783 { 784 struct pcmcia_socket *s = 785 container_of(work, struct pcmcia_socket, device_add); 786 ds_dbg(1, "adding additional device to %d\n", s->sock); 787 pcmcia_device_add(s, s->pcmcia_state.mfc_pfc); 788 s->pcmcia_state.device_add_pending = 0; 789 s->pcmcia_state.mfc_pfc = 0; 790 } 791 792 static int pcmcia_requery(struct device *dev, void * _data) 793 { 794 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 795 if (!p_dev->dev.driver) { 796 ds_dbg(1, "update device information for %s\n", 797 p_dev->dev.bus_id); 798 pcmcia_device_query(p_dev); 799 } 800 801 return 0; 802 } 803 804 static void pcmcia_bus_rescan(struct pcmcia_socket *skt, int new_cis) 805 { 806 int no_devices = 0; 807 int ret = 0; 808 unsigned long flags; 809 810 /* must be called with skt_mutex held */ 811 ds_dbg(0, "re-scanning socket %d\n", skt->sock); 812 813 spin_lock_irqsave(&pcmcia_dev_list_lock, flags); 814 if (list_empty(&skt->devices_list)) 815 no_devices = 1; 816 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags); 817 818 /* If this is because of a CIS override, start over */ 819 if (new_cis && !no_devices) 820 pcmcia_card_remove(skt, NULL); 821 822 /* if no devices were added for this socket yet because of 823 * missing resource information or other trouble, we need to 824 * do this now. */ 825 if (no_devices || new_cis) { 826 ret = pcmcia_card_add(skt); 827 if (ret) 828 return; 829 } 830 831 /* some device information might have changed because of a CIS 832 * update or because we can finally read it correctly... so 833 * determine it again, overwriting old values if necessary. */ 834 bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery); 835 836 /* we re-scan all devices, not just the ones connected to this 837 * socket. This does not matter, though. */ 838 ret = bus_rescan_devices(&pcmcia_bus_type); 839 if (ret) 840 printk(KERN_INFO "pcmcia: bus_rescan_devices failed\n"); 841 } 842 843 #ifdef CONFIG_PCMCIA_LOAD_CIS 844 845 /** 846 * pcmcia_load_firmware - load CIS from userspace if device-provided is broken 847 * @dev: the pcmcia device which needs a CIS override 848 * @filename: requested filename in /lib/firmware/ 849 * 850 * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if 851 * the one provided by the card is broken. The firmware files reside in 852 * /lib/firmware/ in userspace. 853 */ 854 static int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename) 855 { 856 struct pcmcia_socket *s = dev->socket; 857 const struct firmware *fw; 858 char path[FIRMWARE_NAME_MAX]; 859 int ret = -ENOMEM; 860 int no_funcs; 861 int old_funcs; 862 cisdump_t *cis; 863 cistpl_longlink_mfc_t mfc; 864 865 if (!filename) 866 return -EINVAL; 867 868 ds_dbg(1, "trying to load CIS file %s\n", filename); 869 870 if (strlen(filename) > (FIRMWARE_NAME_MAX - 1)) { 871 printk(KERN_WARNING "pcmcia: CIS filename is too long [%s]\n", 872 filename); 873 return -EINVAL; 874 } 875 876 snprintf(path, sizeof(path), "%s", filename); 877 878 if (request_firmware(&fw, path, &dev->dev) == 0) { 879 if (fw->size >= CISTPL_MAX_CIS_SIZE) { 880 ret = -EINVAL; 881 printk(KERN_ERR "pcmcia: CIS override is too big\n"); 882 goto release; 883 } 884 885 cis = kzalloc(sizeof(cisdump_t), GFP_KERNEL); 886 if (!cis) { 887 ret = -ENOMEM; 888 goto release; 889 } 890 891 cis->Length = fw->size + 1; 892 memcpy(cis->Data, fw->data, fw->size); 893 894 if (!pcmcia_replace_cis(s, cis)) 895 ret = 0; 896 else { 897 printk(KERN_ERR "pcmcia: CIS override failed\n"); 898 goto release; 899 } 900 901 902 /* update information */ 903 pcmcia_device_query(dev); 904 905 /* does this cis override add or remove functions? */ 906 old_funcs = s->functions; 907 908 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc)) 909 no_funcs = mfc.nfn; 910 else 911 no_funcs = 1; 912 s->functions = no_funcs; 913 914 if (old_funcs > no_funcs) 915 pcmcia_card_remove(s, dev); 916 else if (no_funcs > old_funcs) 917 pcmcia_add_device_later(s, 1); 918 } 919 release: 920 release_firmware(fw); 921 922 return (ret); 923 } 924 925 #else /* !CONFIG_PCMCIA_LOAD_CIS */ 926 927 static inline int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename) 928 { 929 return -ENODEV; 930 } 931 932 #endif 933 934 935 static inline int pcmcia_devmatch(struct pcmcia_device *dev, 936 struct pcmcia_device_id *did) 937 { 938 if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) { 939 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id)) 940 return 0; 941 } 942 943 if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) { 944 if ((!dev->has_card_id) || (dev->card_id != did->card_id)) 945 return 0; 946 } 947 948 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) { 949 if (dev->func != did->function) 950 return 0; 951 } 952 953 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) { 954 if (!dev->prod_id[0]) 955 return 0; 956 if (strcmp(did->prod_id[0], dev->prod_id[0])) 957 return 0; 958 } 959 960 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) { 961 if (!dev->prod_id[1]) 962 return 0; 963 if (strcmp(did->prod_id[1], dev->prod_id[1])) 964 return 0; 965 } 966 967 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) { 968 if (!dev->prod_id[2]) 969 return 0; 970 if (strcmp(did->prod_id[2], dev->prod_id[2])) 971 return 0; 972 } 973 974 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) { 975 if (!dev->prod_id[3]) 976 return 0; 977 if (strcmp(did->prod_id[3], dev->prod_id[3])) 978 return 0; 979 } 980 981 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) { 982 if (dev->device_no != did->device_no) 983 return 0; 984 } 985 986 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) { 987 if ((!dev->has_func_id) || (dev->func_id != did->func_id)) 988 return 0; 989 990 /* if this is a pseudo-multi-function device, 991 * we need explicit matches */ 992 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) 993 return 0; 994 if (dev->device_no) 995 return 0; 996 997 /* also, FUNC_ID matching needs to be activated by userspace 998 * after it has re-checked that there is no possible module 999 * with a prod_id/manf_id/card_id match. 1000 */ 1001 ds_dbg(0, "skipping FUNC_ID match for %s until userspace " 1002 "interaction\n", dev->dev.bus_id); 1003 if (!dev->allow_func_id_match) 1004 return 0; 1005 } 1006 1007 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) { 1008 ds_dbg(0, "device %s needs a fake CIS\n", dev->dev.bus_id); 1009 if (!dev->socket->fake_cis) 1010 pcmcia_load_firmware(dev, did->cisfile); 1011 1012 if (!dev->socket->fake_cis) 1013 return 0; 1014 } 1015 1016 if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) { 1017 int i; 1018 for (i=0; i<4; i++) 1019 if (dev->prod_id[i]) 1020 return 0; 1021 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id) 1022 return 0; 1023 } 1024 1025 dev->dev.driver_data = (void *) did; 1026 1027 return 1; 1028 } 1029 1030 1031 static int pcmcia_bus_match(struct device * dev, struct device_driver * drv) { 1032 struct pcmcia_device * p_dev = to_pcmcia_dev(dev); 1033 struct pcmcia_driver * p_drv = to_pcmcia_drv(drv); 1034 struct pcmcia_device_id *did = p_drv->id_table; 1035 struct pcmcia_dynid *dynid; 1036 1037 /* match dynamic devices first */ 1038 spin_lock(&p_drv->dynids.lock); 1039 list_for_each_entry(dynid, &p_drv->dynids.list, node) { 1040 ds_dbg(3, "trying to match %s to %s\n", dev->bus_id, 1041 drv->name); 1042 if (pcmcia_devmatch(p_dev, &dynid->id)) { 1043 ds_dbg(0, "matched %s to %s\n", dev->bus_id, 1044 drv->name); 1045 spin_unlock(&p_drv->dynids.lock); 1046 return 1; 1047 } 1048 } 1049 spin_unlock(&p_drv->dynids.lock); 1050 1051 #ifdef CONFIG_PCMCIA_IOCTL 1052 /* matching by cardmgr */ 1053 if (p_dev->cardmgr == p_drv) { 1054 ds_dbg(0, "cardmgr matched %s to %s\n", dev->bus_id, 1055 drv->name); 1056 return 1; 1057 } 1058 #endif 1059 1060 while (did && did->match_flags) { 1061 ds_dbg(3, "trying to match %s to %s\n", dev->bus_id, 1062 drv->name); 1063 if (pcmcia_devmatch(p_dev, did)) { 1064 ds_dbg(0, "matched %s to %s\n", dev->bus_id, 1065 drv->name); 1066 return 1; 1067 } 1068 did++; 1069 } 1070 1071 return 0; 1072 } 1073 1074 #ifdef CONFIG_HOTPLUG 1075 1076 static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env) 1077 { 1078 struct pcmcia_device *p_dev; 1079 int i; 1080 u32 hash[4] = { 0, 0, 0, 0}; 1081 1082 if (!dev) 1083 return -ENODEV; 1084 1085 p_dev = to_pcmcia_dev(dev); 1086 1087 /* calculate hashes */ 1088 for (i=0; i<4; i++) { 1089 if (!p_dev->prod_id[i]) 1090 continue; 1091 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i])); 1092 } 1093 1094 if (add_uevent_var(env, "SOCKET_NO=%u", p_dev->socket->sock)) 1095 return -ENOMEM; 1096 1097 if (add_uevent_var(env, "DEVICE_NO=%02X", p_dev->device_no)) 1098 return -ENOMEM; 1099 1100 if (add_uevent_var(env, "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X" 1101 "pa%08Xpb%08Xpc%08Xpd%08X", 1102 p_dev->has_manf_id ? p_dev->manf_id : 0, 1103 p_dev->has_card_id ? p_dev->card_id : 0, 1104 p_dev->has_func_id ? p_dev->func_id : 0, 1105 p_dev->func, 1106 p_dev->device_no, 1107 hash[0], 1108 hash[1], 1109 hash[2], 1110 hash[3])) 1111 return -ENOMEM; 1112 1113 return 0; 1114 } 1115 1116 #else 1117 1118 static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env) 1119 { 1120 return -ENODEV; 1121 } 1122 1123 #endif 1124 1125 /************************ runtime PM support ***************************/ 1126 1127 static int pcmcia_dev_suspend(struct device *dev, pm_message_t state); 1128 static int pcmcia_dev_resume(struct device *dev); 1129 1130 static int runtime_suspend(struct device *dev) 1131 { 1132 int rc; 1133 1134 down(&dev->sem); 1135 rc = pcmcia_dev_suspend(dev, PMSG_SUSPEND); 1136 up(&dev->sem); 1137 return rc; 1138 } 1139 1140 static void runtime_resume(struct device *dev) 1141 { 1142 int rc; 1143 1144 down(&dev->sem); 1145 rc = pcmcia_dev_resume(dev); 1146 up(&dev->sem); 1147 } 1148 1149 /************************ per-device sysfs output ***************************/ 1150 1151 #define pcmcia_device_attr(field, test, format) \ 1152 static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf) \ 1153 { \ 1154 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \ 1155 return p_dev->test ? sprintf (buf, format, p_dev->field) : -ENODEV; \ 1156 } 1157 1158 #define pcmcia_device_stringattr(name, field) \ 1159 static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf) \ 1160 { \ 1161 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \ 1162 return p_dev->field ? sprintf (buf, "%s\n", p_dev->field) : -ENODEV; \ 1163 } 1164 1165 pcmcia_device_attr(func, socket, "0x%02x\n"); 1166 pcmcia_device_attr(func_id, has_func_id, "0x%02x\n"); 1167 pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n"); 1168 pcmcia_device_attr(card_id, has_card_id, "0x%04x\n"); 1169 pcmcia_device_stringattr(prod_id1, prod_id[0]); 1170 pcmcia_device_stringattr(prod_id2, prod_id[1]); 1171 pcmcia_device_stringattr(prod_id3, prod_id[2]); 1172 pcmcia_device_stringattr(prod_id4, prod_id[3]); 1173 1174 1175 static ssize_t pcmcia_show_pm_state(struct device *dev, struct device_attribute *attr, char *buf) 1176 { 1177 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1178 1179 if (p_dev->suspended) 1180 return sprintf(buf, "off\n"); 1181 else 1182 return sprintf(buf, "on\n"); 1183 } 1184 1185 static ssize_t pcmcia_store_pm_state(struct device *dev, struct device_attribute *attr, 1186 const char *buf, size_t count) 1187 { 1188 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1189 int ret = 0; 1190 1191 if (!count) 1192 return -EINVAL; 1193 1194 if ((!p_dev->suspended) && !strncmp(buf, "off", 3)) 1195 ret = runtime_suspend(dev); 1196 else if (p_dev->suspended && !strncmp(buf, "on", 2)) 1197 runtime_resume(dev); 1198 1199 return ret ? ret : count; 1200 } 1201 1202 1203 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf) 1204 { 1205 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1206 int i; 1207 u32 hash[4] = { 0, 0, 0, 0}; 1208 1209 /* calculate hashes */ 1210 for (i=0; i<4; i++) { 1211 if (!p_dev->prod_id[i]) 1212 continue; 1213 hash[i] = crc32(0,p_dev->prod_id[i],strlen(p_dev->prod_id[i])); 1214 } 1215 return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X" 1216 "pa%08Xpb%08Xpc%08Xpd%08X\n", 1217 p_dev->has_manf_id ? p_dev->manf_id : 0, 1218 p_dev->has_card_id ? p_dev->card_id : 0, 1219 p_dev->has_func_id ? p_dev->func_id : 0, 1220 p_dev->func, p_dev->device_no, 1221 hash[0], hash[1], hash[2], hash[3]); 1222 } 1223 1224 static ssize_t pcmcia_store_allow_func_id_match(struct device *dev, 1225 struct device_attribute *attr, const char *buf, size_t count) 1226 { 1227 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1228 int ret; 1229 1230 if (!count) 1231 return -EINVAL; 1232 1233 mutex_lock(&p_dev->socket->skt_mutex); 1234 p_dev->allow_func_id_match = 1; 1235 mutex_unlock(&p_dev->socket->skt_mutex); 1236 1237 ret = bus_rescan_devices(&pcmcia_bus_type); 1238 if (ret) 1239 printk(KERN_INFO "pcmcia: bus_rescan_devices failed after " 1240 "allowing func_id matches\n"); 1241 1242 return count; 1243 } 1244 1245 static struct device_attribute pcmcia_dev_attrs[] = { 1246 __ATTR(function, 0444, func_show, NULL), 1247 __ATTR(pm_state, 0644, pcmcia_show_pm_state, pcmcia_store_pm_state), 1248 __ATTR_RO(func_id), 1249 __ATTR_RO(manf_id), 1250 __ATTR_RO(card_id), 1251 __ATTR_RO(prod_id1), 1252 __ATTR_RO(prod_id2), 1253 __ATTR_RO(prod_id3), 1254 __ATTR_RO(prod_id4), 1255 __ATTR_RO(modalias), 1256 __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match), 1257 __ATTR_NULL, 1258 }; 1259 1260 /* PM support, also needed for reset */ 1261 1262 static int pcmcia_dev_suspend(struct device * dev, pm_message_t state) 1263 { 1264 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1265 struct pcmcia_driver *p_drv = NULL; 1266 int ret = 0; 1267 1268 if (p_dev->suspended) 1269 return 0; 1270 1271 ds_dbg(2, "suspending %s\n", dev->bus_id); 1272 1273 if (dev->driver) 1274 p_drv = to_pcmcia_drv(dev->driver); 1275 1276 if (!p_drv) 1277 goto out; 1278 1279 if (p_drv->suspend) { 1280 ret = p_drv->suspend(p_dev); 1281 if (ret) { 1282 printk(KERN_ERR "pcmcia: device %s (driver %s) did " 1283 "not want to go to sleep (%d)\n", 1284 p_dev->devname, p_drv->drv.name, ret); 1285 goto out; 1286 } 1287 } 1288 1289 if (p_dev->device_no == p_dev->func) { 1290 ds_dbg(2, "releasing configuration for %s\n", dev->bus_id); 1291 pcmcia_release_configuration(p_dev); 1292 } 1293 1294 out: 1295 if (!ret) 1296 p_dev->suspended = 1; 1297 return ret; 1298 } 1299 1300 1301 static int pcmcia_dev_resume(struct device * dev) 1302 { 1303 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1304 struct pcmcia_driver *p_drv = NULL; 1305 int ret = 0; 1306 1307 if (!p_dev->suspended) 1308 return 0; 1309 1310 ds_dbg(2, "resuming %s\n", dev->bus_id); 1311 1312 if (dev->driver) 1313 p_drv = to_pcmcia_drv(dev->driver); 1314 1315 if (!p_drv) 1316 goto out; 1317 1318 if (p_dev->device_no == p_dev->func) { 1319 ds_dbg(2, "requesting configuration for %s\n", dev->bus_id); 1320 ret = pcmcia_request_configuration(p_dev, &p_dev->conf); 1321 if (ret) 1322 goto out; 1323 } 1324 1325 if (p_drv->resume) 1326 ret = p_drv->resume(p_dev); 1327 1328 out: 1329 if (!ret) 1330 p_dev->suspended = 0; 1331 return ret; 1332 } 1333 1334 1335 static int pcmcia_bus_suspend_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 return runtime_suspend(dev); 1344 } 1345 1346 static int pcmcia_bus_resume_callback(struct device *dev, void * _data) 1347 { 1348 struct pcmcia_socket *skt = _data; 1349 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1350 1351 if (p_dev->socket != skt || !p_dev->suspended) 1352 return 0; 1353 1354 runtime_resume(dev); 1355 1356 return 0; 1357 } 1358 1359 static int pcmcia_bus_resume(struct pcmcia_socket *skt) 1360 { 1361 ds_dbg(2, "resuming socket %d\n", skt->sock); 1362 bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback); 1363 return 0; 1364 } 1365 1366 static int pcmcia_bus_suspend(struct pcmcia_socket *skt) 1367 { 1368 ds_dbg(2, "suspending socket %d\n", skt->sock); 1369 if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt, 1370 pcmcia_bus_suspend_callback)) { 1371 pcmcia_bus_resume(skt); 1372 return -EIO; 1373 } 1374 return 0; 1375 } 1376 1377 1378 /*====================================================================== 1379 1380 The card status event handler. 1381 1382 ======================================================================*/ 1383 1384 /* Normally, the event is passed to individual drivers after 1385 * informing userspace. Only for CS_EVENT_CARD_REMOVAL this 1386 * is inversed to maintain historic compatibility. 1387 */ 1388 1389 static int ds_event(struct pcmcia_socket *skt, event_t event, int priority) 1390 { 1391 struct pcmcia_socket *s = pcmcia_get_socket(skt); 1392 1393 if (!s) { 1394 printk(KERN_ERR "PCMCIA obtaining reference to socket %p " \ 1395 "failed, event 0x%x lost!\n", skt, event); 1396 return -ENODEV; 1397 } 1398 1399 ds_dbg(1, "ds_event(0x%06x, %d, 0x%p)\n", 1400 event, priority, skt); 1401 1402 switch (event) { 1403 case CS_EVENT_CARD_REMOVAL: 1404 s->pcmcia_state.present = 0; 1405 pcmcia_card_remove(skt, NULL); 1406 handle_event(skt, event); 1407 break; 1408 1409 case CS_EVENT_CARD_INSERTION: 1410 s->pcmcia_state.present = 1; 1411 pcmcia_card_add(skt); 1412 handle_event(skt, event); 1413 break; 1414 1415 case CS_EVENT_EJECTION_REQUEST: 1416 break; 1417 1418 case CS_EVENT_PM_SUSPEND: 1419 case CS_EVENT_PM_RESUME: 1420 case CS_EVENT_RESET_PHYSICAL: 1421 case CS_EVENT_CARD_RESET: 1422 default: 1423 handle_event(skt, event); 1424 break; 1425 } 1426 1427 pcmcia_put_socket(s); 1428 1429 return 0; 1430 } /* ds_event */ 1431 1432 1433 struct pcmcia_device * pcmcia_dev_present(struct pcmcia_device *_p_dev) 1434 { 1435 struct pcmcia_device *p_dev; 1436 struct pcmcia_device *ret = NULL; 1437 1438 p_dev = pcmcia_get_dev(_p_dev); 1439 if (!p_dev) 1440 return NULL; 1441 1442 if (!p_dev->socket->pcmcia_state.present) 1443 goto out; 1444 1445 if (p_dev->_removed) 1446 goto out; 1447 1448 if (p_dev->suspended) 1449 goto out; 1450 1451 ret = p_dev; 1452 out: 1453 pcmcia_put_dev(p_dev); 1454 return ret; 1455 } 1456 EXPORT_SYMBOL(pcmcia_dev_present); 1457 1458 1459 static struct pcmcia_callback pcmcia_bus_callback = { 1460 .owner = THIS_MODULE, 1461 .event = ds_event, 1462 .requery = pcmcia_bus_rescan, 1463 .suspend = pcmcia_bus_suspend, 1464 .resume = pcmcia_bus_resume, 1465 }; 1466 1467 static int __devinit pcmcia_bus_add_socket(struct device *dev, 1468 struct class_interface *class_intf) 1469 { 1470 struct pcmcia_socket *socket = dev_get_drvdata(dev); 1471 int ret; 1472 1473 socket = pcmcia_get_socket(socket); 1474 if (!socket) { 1475 printk(KERN_ERR "PCMCIA obtaining reference to socket %p failed\n", socket); 1476 return -ENODEV; 1477 } 1478 1479 /* 1480 * Ugly. But we want to wait for the socket threads to have started up. 1481 * We really should let the drivers themselves drive some of this.. 1482 */ 1483 msleep(250); 1484 1485 #ifdef CONFIG_PCMCIA_IOCTL 1486 init_waitqueue_head(&socket->queue); 1487 #endif 1488 INIT_LIST_HEAD(&socket->devices_list); 1489 INIT_WORK(&socket->device_add, pcmcia_delayed_add_device); 1490 memset(&socket->pcmcia_state, 0, sizeof(u8)); 1491 socket->device_count = 0; 1492 1493 ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback); 1494 if (ret) { 1495 printk(KERN_ERR "PCMCIA registration PCCard core failed for socket %p\n", socket); 1496 pcmcia_put_socket(socket); 1497 return (ret); 1498 } 1499 1500 return 0; 1501 } 1502 1503 static void pcmcia_bus_remove_socket(struct device *dev, 1504 struct class_interface *class_intf) 1505 { 1506 struct pcmcia_socket *socket = dev_get_drvdata(dev); 1507 1508 if (!socket) 1509 return; 1510 1511 socket->pcmcia_state.dead = 1; 1512 pccard_register_pcmcia(socket, NULL); 1513 1514 /* unregister any unbound devices */ 1515 mutex_lock(&socket->skt_mutex); 1516 pcmcia_card_remove(socket, NULL); 1517 mutex_unlock(&socket->skt_mutex); 1518 1519 pcmcia_put_socket(socket); 1520 1521 return; 1522 } 1523 1524 1525 /* the pcmcia_bus_interface is used to handle pcmcia socket devices */ 1526 static struct class_interface pcmcia_bus_interface __refdata = { 1527 .class = &pcmcia_socket_class, 1528 .add_dev = &pcmcia_bus_add_socket, 1529 .remove_dev = &pcmcia_bus_remove_socket, 1530 }; 1531 1532 1533 struct bus_type pcmcia_bus_type = { 1534 .name = "pcmcia", 1535 .uevent = pcmcia_bus_uevent, 1536 .match = pcmcia_bus_match, 1537 .dev_attrs = pcmcia_dev_attrs, 1538 .probe = pcmcia_device_probe, 1539 .remove = pcmcia_device_remove, 1540 .suspend = pcmcia_dev_suspend, 1541 .resume = pcmcia_dev_resume, 1542 }; 1543 1544 1545 static int __init init_pcmcia_bus(void) 1546 { 1547 int ret; 1548 1549 spin_lock_init(&pcmcia_dev_list_lock); 1550 1551 ret = bus_register(&pcmcia_bus_type); 1552 if (ret < 0) { 1553 printk(KERN_WARNING "pcmcia: bus_register error: %d\n", ret); 1554 return ret; 1555 } 1556 ret = class_interface_register(&pcmcia_bus_interface); 1557 if (ret < 0) { 1558 printk(KERN_WARNING 1559 "pcmcia: class_interface_register error: %d\n", ret); 1560 bus_unregister(&pcmcia_bus_type); 1561 return ret; 1562 } 1563 1564 pcmcia_setup_ioctl(); 1565 1566 return 0; 1567 } 1568 fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that 1569 * pcmcia_socket_class is already registered */ 1570 1571 1572 static void __exit exit_pcmcia_bus(void) 1573 { 1574 pcmcia_cleanup_ioctl(); 1575 1576 class_interface_unregister(&pcmcia_bus_interface); 1577 1578 bus_unregister(&pcmcia_bus_type); 1579 } 1580 module_exit(exit_pcmcia_bus); 1581 1582 1583 MODULE_ALIAS("ds"); 1584