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 #define IN_CARD_SERVICES 29 #include <pcmcia/cs_types.h> 30 #include <pcmcia/cs.h> 31 #include <pcmcia/cistpl.h> 32 #include <pcmcia/ds.h> 33 #include <pcmcia/ss.h> 34 35 #include "cs_internal.h" 36 #include "ds_internal.h" 37 38 /*====================================================================*/ 39 40 /* Module parameters */ 41 42 MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>"); 43 MODULE_DESCRIPTION("PCMCIA Driver Services"); 44 MODULE_LICENSE("GPL"); 45 46 #ifdef DEBUG 47 int ds_pc_debug; 48 49 module_param_named(pc_debug, ds_pc_debug, int, 0644); 50 51 #define ds_dbg(lvl, fmt, arg...) do { \ 52 if (ds_pc_debug > (lvl)) \ 53 printk(KERN_DEBUG "ds: " fmt , ## arg); \ 54 } while (0) 55 #else 56 #define ds_dbg(lvl, fmt, arg...) do { } while (0) 57 #endif 58 59 spinlock_t pcmcia_dev_list_lock; 60 61 /*====================================================================*/ 62 63 /* code which was in cs.c before */ 64 65 /* String tables for error messages */ 66 67 typedef struct lookup_t { 68 int key; 69 char *msg; 70 } lookup_t; 71 72 static const lookup_t error_table[] = { 73 { CS_SUCCESS, "Operation succeeded" }, 74 { CS_BAD_ADAPTER, "Bad adapter" }, 75 { CS_BAD_ATTRIBUTE, "Bad attribute", }, 76 { CS_BAD_BASE, "Bad base address" }, 77 { CS_BAD_EDC, "Bad EDC" }, 78 { CS_BAD_IRQ, "Bad IRQ" }, 79 { CS_BAD_OFFSET, "Bad offset" }, 80 { CS_BAD_PAGE, "Bad page number" }, 81 { CS_READ_FAILURE, "Read failure" }, 82 { CS_BAD_SIZE, "Bad size" }, 83 { CS_BAD_SOCKET, "Bad socket" }, 84 { CS_BAD_TYPE, "Bad type" }, 85 { CS_BAD_VCC, "Bad Vcc" }, 86 { CS_BAD_VPP, "Bad Vpp" }, 87 { CS_BAD_WINDOW, "Bad window" }, 88 { CS_WRITE_FAILURE, "Write failure" }, 89 { CS_NO_CARD, "No card present" }, 90 { CS_UNSUPPORTED_FUNCTION, "Usupported function" }, 91 { CS_UNSUPPORTED_MODE, "Unsupported mode" }, 92 { CS_BAD_SPEED, "Bad speed" }, 93 { CS_BUSY, "Resource busy" }, 94 { CS_GENERAL_FAILURE, "General failure" }, 95 { CS_WRITE_PROTECTED, "Write protected" }, 96 { CS_BAD_ARG_LENGTH, "Bad argument length" }, 97 { CS_BAD_ARGS, "Bad arguments" }, 98 { CS_CONFIGURATION_LOCKED, "Configuration locked" }, 99 { CS_IN_USE, "Resource in use" }, 100 { CS_NO_MORE_ITEMS, "No more items" }, 101 { CS_OUT_OF_RESOURCE, "Out of resource" }, 102 { CS_BAD_HANDLE, "Bad handle" }, 103 { CS_BAD_TUPLE, "Bad CIS tuple" } 104 }; 105 106 107 static const lookup_t service_table[] = { 108 { AccessConfigurationRegister, "AccessConfigurationRegister" }, 109 { AddSocketServices, "AddSocketServices" }, 110 { AdjustResourceInfo, "AdjustResourceInfo" }, 111 { CheckEraseQueue, "CheckEraseQueue" }, 112 { CloseMemory, "CloseMemory" }, 113 { DeregisterClient, "DeregisterClient" }, 114 { DeregisterEraseQueue, "DeregisterEraseQueue" }, 115 { GetCardServicesInfo, "GetCardServicesInfo" }, 116 { GetClientInfo, "GetClientInfo" }, 117 { GetConfigurationInfo, "GetConfigurationInfo" }, 118 { GetEventMask, "GetEventMask" }, 119 { GetFirstClient, "GetFirstClient" }, 120 { GetFirstRegion, "GetFirstRegion" }, 121 { GetFirstTuple, "GetFirstTuple" }, 122 { GetNextClient, "GetNextClient" }, 123 { GetNextRegion, "GetNextRegion" }, 124 { GetNextTuple, "GetNextTuple" }, 125 { GetStatus, "GetStatus" }, 126 { GetTupleData, "GetTupleData" }, 127 { MapMemPage, "MapMemPage" }, 128 { ModifyConfiguration, "ModifyConfiguration" }, 129 { ModifyWindow, "ModifyWindow" }, 130 { OpenMemory, "OpenMemory" }, 131 { ParseTuple, "ParseTuple" }, 132 { ReadMemory, "ReadMemory" }, 133 { RegisterClient, "RegisterClient" }, 134 { RegisterEraseQueue, "RegisterEraseQueue" }, 135 { RegisterMTD, "RegisterMTD" }, 136 { ReleaseConfiguration, "ReleaseConfiguration" }, 137 { ReleaseIO, "ReleaseIO" }, 138 { ReleaseIRQ, "ReleaseIRQ" }, 139 { ReleaseWindow, "ReleaseWindow" }, 140 { RequestConfiguration, "RequestConfiguration" }, 141 { RequestIO, "RequestIO" }, 142 { RequestIRQ, "RequestIRQ" }, 143 { RequestSocketMask, "RequestSocketMask" }, 144 { RequestWindow, "RequestWindow" }, 145 { ResetCard, "ResetCard" }, 146 { SetEventMask, "SetEventMask" }, 147 { ValidateCIS, "ValidateCIS" }, 148 { WriteMemory, "WriteMemory" }, 149 { BindDevice, "BindDevice" }, 150 { BindMTD, "BindMTD" }, 151 { ReportError, "ReportError" }, 152 { SuspendCard, "SuspendCard" }, 153 { ResumeCard, "ResumeCard" }, 154 { EjectCard, "EjectCard" }, 155 { InsertCard, "InsertCard" }, 156 { ReplaceCIS, "ReplaceCIS" } 157 }; 158 159 160 static int pcmcia_report_error(struct pcmcia_device *p_dev, error_info_t *err) 161 { 162 int i; 163 char *serv; 164 165 if (!p_dev) 166 printk(KERN_NOTICE); 167 else 168 printk(KERN_NOTICE "%s: ", p_dev->dev.bus_id); 169 170 for (i = 0; i < ARRAY_SIZE(service_table); i++) 171 if (service_table[i].key == err->func) 172 break; 173 if (i < ARRAY_SIZE(service_table)) 174 serv = service_table[i].msg; 175 else 176 serv = "Unknown service number"; 177 178 for (i = 0; i < ARRAY_SIZE(error_table); i++) 179 if (error_table[i].key == err->retcode) 180 break; 181 if (i < ARRAY_SIZE(error_table)) 182 printk("%s: %s\n", serv, error_table[i].msg); 183 else 184 printk("%s: Unknown error code %#x\n", serv, err->retcode); 185 186 return CS_SUCCESS; 187 } /* report_error */ 188 189 /* end of code which was in cs.c before */ 190 191 /*======================================================================*/ 192 193 void cs_error(struct pcmcia_device *p_dev, int func, int ret) 194 { 195 error_info_t err = { func, ret }; 196 pcmcia_report_error(p_dev, &err); 197 } 198 EXPORT_SYMBOL(cs_error); 199 200 201 static void pcmcia_check_driver(struct pcmcia_driver *p_drv) 202 { 203 struct pcmcia_device_id *did = p_drv->id_table; 204 unsigned int i; 205 u32 hash; 206 207 if (!p_drv->probe || !p_drv->remove) 208 printk(KERN_DEBUG "pcmcia: %s lacks a requisite callback " 209 "function\n", p_drv->drv.name); 210 211 while (did && did->match_flags) { 212 for (i=0; i<4; i++) { 213 if (!did->prod_id[i]) 214 continue; 215 216 hash = crc32(0, did->prod_id[i], strlen(did->prod_id[i])); 217 if (hash == did->prod_id_hash[i]) 218 continue; 219 220 printk(KERN_DEBUG "pcmcia: %s: invalid hash for " 221 "product string \"%s\": is 0x%x, should " 222 "be 0x%x\n", p_drv->drv.name, did->prod_id[i], 223 did->prod_id_hash[i], hash); 224 printk(KERN_DEBUG "pcmcia: see " 225 "Documentation/pcmcia/devicetable.txt for " 226 "details\n"); 227 } 228 did++; 229 } 230 231 return; 232 } 233 234 235 /*======================================================================*/ 236 237 238 struct pcmcia_dynid { 239 struct list_head node; 240 struct pcmcia_device_id id; 241 }; 242 243 /** 244 * pcmcia_store_new_id - add a new PCMCIA device ID to this driver and re-probe devices 245 * @driver: target device driver 246 * @buf: buffer for scanning device ID data 247 * @count: input size 248 * 249 * Adds a new dynamic PCMCIA device ID to this driver, 250 * and causes the driver to probe for all devices again. 251 */ 252 static ssize_t 253 pcmcia_store_new_id(struct device_driver *driver, const char *buf, size_t count) 254 { 255 struct pcmcia_dynid *dynid; 256 struct pcmcia_driver *pdrv = to_pcmcia_drv(driver); 257 __u16 match_flags, manf_id, card_id; 258 __u8 func_id, function, device_no; 259 __u32 prod_id_hash[4] = {0, 0, 0, 0}; 260 int fields=0; 261 int retval = 0; 262 263 fields = sscanf(buf, "%hx %hx %hx %hhx %hhx %hhx %x %x %x %x", 264 &match_flags, &manf_id, &card_id, &func_id, &function, &device_no, 265 &prod_id_hash[0], &prod_id_hash[1], &prod_id_hash[2], &prod_id_hash[3]); 266 if (fields < 6) 267 return -EINVAL; 268 269 dynid = kzalloc(sizeof(struct pcmcia_dynid), GFP_KERNEL); 270 if (!dynid) 271 return -ENOMEM; 272 273 INIT_LIST_HEAD(&dynid->node); 274 dynid->id.match_flags = match_flags; 275 dynid->id.manf_id = manf_id; 276 dynid->id.card_id = card_id; 277 dynid->id.func_id = func_id; 278 dynid->id.function = function; 279 dynid->id.device_no = device_no; 280 memcpy(dynid->id.prod_id_hash, prod_id_hash, sizeof(__u32) * 4); 281 282 spin_lock(&pdrv->dynids.lock); 283 list_add_tail(&pdrv->dynids.list, &dynid->node); 284 spin_unlock(&pdrv->dynids.lock); 285 286 if (get_driver(&pdrv->drv)) { 287 retval = driver_attach(&pdrv->drv); 288 put_driver(&pdrv->drv); 289 } 290 291 if (retval) 292 return retval; 293 return count; 294 } 295 static DRIVER_ATTR(new_id, S_IWUSR, NULL, pcmcia_store_new_id); 296 297 static void 298 pcmcia_free_dynids(struct pcmcia_driver *drv) 299 { 300 struct pcmcia_dynid *dynid, *n; 301 302 spin_lock(&drv->dynids.lock); 303 list_for_each_entry_safe(dynid, n, &drv->dynids.list, node) { 304 list_del(&dynid->node); 305 kfree(dynid); 306 } 307 spin_unlock(&drv->dynids.lock); 308 } 309 310 static int 311 pcmcia_create_newid_file(struct pcmcia_driver *drv) 312 { 313 int error = 0; 314 if (drv->probe != NULL) 315 error = sysfs_create_file(&drv->drv.kobj, 316 &driver_attr_new_id.attr); 317 return error; 318 } 319 320 321 /** 322 * pcmcia_register_driver - register a PCMCIA driver with the bus core 323 * 324 * Registers a PCMCIA driver with the PCMCIA bus core. 325 */ 326 int pcmcia_register_driver(struct pcmcia_driver *driver) 327 { 328 int error; 329 330 if (!driver) 331 return -EINVAL; 332 333 pcmcia_check_driver(driver); 334 335 /* initialize common fields */ 336 driver->drv.bus = &pcmcia_bus_type; 337 driver->drv.owner = driver->owner; 338 spin_lock_init(&driver->dynids.lock); 339 INIT_LIST_HEAD(&driver->dynids.list); 340 341 ds_dbg(3, "registering driver %s\n", driver->drv.name); 342 343 error = driver_register(&driver->drv); 344 if (error < 0) 345 return error; 346 347 error = pcmcia_create_newid_file(driver); 348 if (error) 349 driver_unregister(&driver->drv); 350 351 return error; 352 } 353 EXPORT_SYMBOL(pcmcia_register_driver); 354 355 /** 356 * pcmcia_unregister_driver - unregister a PCMCIA driver with the bus core 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 ds_dbg(1, "trying to bind %s to %s\n", p_dev->dev.bus_id, 431 p_drv->drv.name); 432 433 if ((!p_drv->probe) || (!p_dev->function_config) || 434 (!try_module_get(p_drv->owner))) { 435 ret = -EINVAL; 436 goto put_dev; 437 } 438 439 /* set up some more device information */ 440 ret = pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_CONFIG, 441 &cis_config); 442 if (!ret) { 443 p_dev->conf.ConfigBase = cis_config.base; 444 p_dev->conf.Present = cis_config.rmask[0]; 445 } else { 446 printk(KERN_INFO "pcmcia: could not parse base and rmask0 of CIS\n"); 447 p_dev->conf.ConfigBase = 0; 448 p_dev->conf.Present = 0; 449 } 450 451 ret = p_drv->probe(p_dev); 452 if (ret) { 453 ds_dbg(1, "binding %s to %s failed with %d\n", 454 p_dev->dev.bus_id, p_drv->drv.name, ret); 455 goto put_module; 456 } 457 458 /* handle pseudo multifunction devices: 459 * there are at most two pseudo multifunction devices. 460 * if we're matching against the first, schedule a 461 * call which will then check whether there are two 462 * pseudo devices, and if not, add the second one. 463 */ 464 did = p_dev->dev.driver_data; 465 if (did && (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) && 466 (p_dev->socket->device_count == 1) && (p_dev->device_no == 0)) 467 pcmcia_add_device_later(p_dev->socket, 0); 468 469 put_module: 470 if (ret) 471 module_put(p_drv->owner); 472 put_dev: 473 if (ret) 474 put_device(dev); 475 return (ret); 476 } 477 478 479 /* 480 * Removes a PCMCIA card from the device tree and socket list. 481 */ 482 static void pcmcia_card_remove(struct pcmcia_socket *s, struct pcmcia_device *leftover) 483 { 484 struct pcmcia_device *p_dev; 485 struct pcmcia_device *tmp; 486 unsigned long flags; 487 488 ds_dbg(2, "pcmcia_card_remove(%d) %s\n", s->sock, 489 leftover ? leftover->devname : ""); 490 491 if (!leftover) 492 s->device_count = 0; 493 else 494 s->device_count = 1; 495 496 /* unregister all pcmcia_devices registered with this socket, except leftover */ 497 list_for_each_entry_safe(p_dev, tmp, &s->devices_list, socket_device_list) { 498 if (p_dev == leftover) 499 continue; 500 501 spin_lock_irqsave(&pcmcia_dev_list_lock, flags); 502 list_del(&p_dev->socket_device_list); 503 p_dev->_removed=1; 504 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags); 505 506 ds_dbg(2, "unregistering device %s\n", p_dev->dev.bus_id); 507 device_unregister(&p_dev->dev); 508 } 509 510 return; 511 } 512 513 static int pcmcia_device_remove(struct device * dev) 514 { 515 struct pcmcia_device *p_dev; 516 struct pcmcia_driver *p_drv; 517 struct pcmcia_device_id *did; 518 int i; 519 520 p_dev = to_pcmcia_dev(dev); 521 p_drv = to_pcmcia_drv(dev->driver); 522 523 ds_dbg(1, "removing device %s\n", p_dev->dev.bus_id); 524 525 /* If we're removing the primary module driving a 526 * pseudo multi-function card, we need to unbind 527 * all devices 528 */ 529 did = p_dev->dev.driver_data; 530 if (did && (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) && 531 (p_dev->socket->device_count != 0) && 532 (p_dev->device_no == 0)) 533 pcmcia_card_remove(p_dev->socket, p_dev); 534 535 /* detach the "instance" */ 536 if (!p_drv) 537 return 0; 538 539 if (p_drv->remove) 540 p_drv->remove(p_dev); 541 542 p_dev->dev_node = NULL; 543 544 /* check for proper unloading */ 545 if (p_dev->_irq || p_dev->_io || p_dev->_locked) 546 printk(KERN_INFO "pcmcia: driver %s did not release config properly\n", 547 p_drv->drv.name); 548 549 for (i = 0; i < MAX_WIN; i++) 550 if (p_dev->_win & CLIENT_WIN_REQ(i)) 551 printk(KERN_INFO "pcmcia: driver %s did not release windows properly\n", 552 p_drv->drv.name); 553 554 /* references from pcmcia_probe_device */ 555 pcmcia_put_dev(p_dev); 556 module_put(p_drv->owner); 557 558 return 0; 559 } 560 561 562 /* 563 * pcmcia_device_query -- determine information about a pcmcia device 564 */ 565 static int pcmcia_device_query(struct pcmcia_device *p_dev) 566 { 567 cistpl_manfid_t manf_id; 568 cistpl_funcid_t func_id; 569 cistpl_vers_1_t *vers1; 570 unsigned int i; 571 572 vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL); 573 if (!vers1) 574 return -ENOMEM; 575 576 if (!pccard_read_tuple(p_dev->socket, p_dev->func, 577 CISTPL_MANFID, &manf_id)) { 578 p_dev->manf_id = manf_id.manf; 579 p_dev->card_id = manf_id.card; 580 p_dev->has_manf_id = 1; 581 p_dev->has_card_id = 1; 582 } 583 584 if (!pccard_read_tuple(p_dev->socket, p_dev->func, 585 CISTPL_FUNCID, &func_id)) { 586 p_dev->func_id = func_id.func; 587 p_dev->has_func_id = 1; 588 } else { 589 /* rule of thumb: cards with no FUNCID, but with 590 * common memory device geometry information, are 591 * probably memory cards (from pcmcia-cs) */ 592 cistpl_device_geo_t *devgeo; 593 594 devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL); 595 if (!devgeo) { 596 kfree(vers1); 597 return -ENOMEM; 598 } 599 if (!pccard_read_tuple(p_dev->socket, p_dev->func, 600 CISTPL_DEVICE_GEO, devgeo)) { 601 ds_dbg(0, "mem device geometry probably means " 602 "FUNCID_MEMORY\n"); 603 p_dev->func_id = CISTPL_FUNCID_MEMORY; 604 p_dev->has_func_id = 1; 605 } 606 kfree(devgeo); 607 } 608 609 if (!pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_VERS_1, 610 vers1)) { 611 for (i=0; i < vers1->ns; i++) { 612 char *tmp; 613 unsigned int length; 614 615 tmp = vers1->str + vers1->ofs[i]; 616 617 length = strlen(tmp) + 1; 618 if ((length < 2) || (length > 255)) 619 continue; 620 621 p_dev->prod_id[i] = kmalloc(sizeof(char) * length, 622 GFP_KERNEL); 623 if (!p_dev->prod_id[i]) 624 continue; 625 626 p_dev->prod_id[i] = strncpy(p_dev->prod_id[i], 627 tmp, length); 628 } 629 } 630 631 kfree(vers1); 632 return 0; 633 } 634 635 636 /* device_add_lock is needed to avoid double registration by cardmgr and kernel. 637 * Serializes pcmcia_device_add; will most likely be removed in future. 638 * 639 * While it has the caveat that adding new PCMCIA devices inside(!) device_register() 640 * won't work, this doesn't matter much at the moment: the driver core doesn't 641 * support it either. 642 */ 643 static DEFINE_MUTEX(device_add_lock); 644 645 struct pcmcia_device * pcmcia_device_add(struct pcmcia_socket *s, unsigned int function) 646 { 647 struct pcmcia_device *p_dev, *tmp_dev; 648 unsigned long flags; 649 int bus_id_len; 650 651 s = pcmcia_get_socket(s); 652 if (!s) 653 return NULL; 654 655 mutex_lock(&device_add_lock); 656 657 ds_dbg(3, "adding device to %d, function %d\n", s->sock, function); 658 659 /* max of 4 devices per card */ 660 if (s->device_count == 4) 661 goto err_put; 662 663 p_dev = kzalloc(sizeof(struct pcmcia_device), GFP_KERNEL); 664 if (!p_dev) 665 goto err_put; 666 667 p_dev->socket = s; 668 p_dev->device_no = (s->device_count++); 669 p_dev->func = function; 670 671 p_dev->dev.bus = &pcmcia_bus_type; 672 p_dev->dev.parent = s->dev.parent; 673 p_dev->dev.release = pcmcia_release_dev; 674 /* by default don't allow DMA */ 675 p_dev->dma_mask = DMA_MASK_NONE; 676 p_dev->dev.dma_mask = &p_dev->dma_mask; 677 bus_id_len = sprintf (p_dev->dev.bus_id, "%d.%d", p_dev->socket->sock, p_dev->device_no); 678 679 p_dev->devname = kmalloc(6 + bus_id_len + 1, GFP_KERNEL); 680 if (!p_dev->devname) 681 goto err_free; 682 sprintf (p_dev->devname, "pcmcia%s", p_dev->dev.bus_id); 683 ds_dbg(3, "devname is %s\n", p_dev->devname); 684 685 spin_lock_irqsave(&pcmcia_dev_list_lock, flags); 686 687 /* 688 * p_dev->function_config must be the same for all card functions. 689 * Note that this is serialized by the device_add_lock, so that 690 * only one such struct will be created. 691 */ 692 list_for_each_entry(tmp_dev, &s->devices_list, socket_device_list) 693 if (p_dev->func == tmp_dev->func) { 694 p_dev->function_config = tmp_dev->function_config; 695 kref_get(&p_dev->function_config->ref); 696 } 697 698 /* Add to the list in pcmcia_bus_socket */ 699 list_add(&p_dev->socket_device_list, &s->devices_list); 700 701 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags); 702 703 if (!p_dev->function_config) { 704 ds_dbg(3, "creating config_t for %s\n", p_dev->dev.bus_id); 705 p_dev->function_config = kzalloc(sizeof(struct config_t), 706 GFP_KERNEL); 707 if (!p_dev->function_config) 708 goto err_unreg; 709 kref_init(&p_dev->function_config->ref); 710 } 711 712 printk(KERN_NOTICE "pcmcia: registering new device %s\n", 713 p_dev->devname); 714 715 pcmcia_device_query(p_dev); 716 717 if (device_register(&p_dev->dev)) 718 goto err_unreg; 719 720 mutex_unlock(&device_add_lock); 721 722 return p_dev; 723 724 err_unreg: 725 spin_lock_irqsave(&pcmcia_dev_list_lock, flags); 726 list_del(&p_dev->socket_device_list); 727 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags); 728 729 err_free: 730 kfree(p_dev->devname); 731 kfree(p_dev); 732 s->device_count--; 733 err_put: 734 mutex_unlock(&device_add_lock); 735 pcmcia_put_socket(s); 736 737 return NULL; 738 } 739 740 741 static int pcmcia_card_add(struct pcmcia_socket *s) 742 { 743 cisinfo_t cisinfo; 744 cistpl_longlink_mfc_t mfc; 745 unsigned int no_funcs, i; 746 int ret = 0; 747 748 if (!(s->resource_setup_done)) { 749 ds_dbg(3, "no resources available, delaying card_add\n"); 750 return -EAGAIN; /* try again, but later... */ 751 } 752 753 if (pcmcia_validate_mem(s)) { 754 ds_dbg(3, "validating mem resources failed, " 755 "delaying card_add\n"); 756 return -EAGAIN; /* try again, but later... */ 757 } 758 759 ret = pccard_validate_cis(s, BIND_FN_ALL, &cisinfo); 760 if (ret || !cisinfo.Chains) { 761 ds_dbg(0, "invalid CIS or invalid resources\n"); 762 return -ENODEV; 763 } 764 765 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc)) 766 no_funcs = mfc.nfn; 767 else 768 no_funcs = 1; 769 s->functions = no_funcs; 770 771 for (i=0; i < no_funcs; i++) 772 pcmcia_device_add(s, i); 773 774 return (ret); 775 } 776 777 778 static void pcmcia_delayed_add_device(struct work_struct *work) 779 { 780 struct pcmcia_socket *s = 781 container_of(work, struct pcmcia_socket, device_add); 782 ds_dbg(1, "adding additional device to %d\n", s->sock); 783 pcmcia_device_add(s, s->pcmcia_state.mfc_pfc); 784 s->pcmcia_state.device_add_pending = 0; 785 s->pcmcia_state.mfc_pfc = 0; 786 } 787 788 static int pcmcia_requery(struct device *dev, void * _data) 789 { 790 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 791 if (!p_dev->dev.driver) { 792 ds_dbg(1, "update device information for %s\n", 793 p_dev->dev.bus_id); 794 pcmcia_device_query(p_dev); 795 } 796 797 return 0; 798 } 799 800 static void pcmcia_bus_rescan(struct pcmcia_socket *skt, int new_cis) 801 { 802 int no_devices = 0; 803 int ret = 0; 804 unsigned long flags; 805 806 /* must be called with skt_mutex held */ 807 ds_dbg(0, "re-scanning socket %d\n", skt->sock); 808 809 spin_lock_irqsave(&pcmcia_dev_list_lock, flags); 810 if (list_empty(&skt->devices_list)) 811 no_devices = 1; 812 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags); 813 814 /* If this is because of a CIS override, start over */ 815 if (new_cis && !no_devices) 816 pcmcia_card_remove(skt, NULL); 817 818 /* if no devices were added for this socket yet because of 819 * missing resource information or other trouble, we need to 820 * do this now. */ 821 if (no_devices || new_cis) { 822 ret = pcmcia_card_add(skt); 823 if (ret) 824 return; 825 } 826 827 /* some device information might have changed because of a CIS 828 * update or because we can finally read it correctly... so 829 * determine it again, overwriting old values if necessary. */ 830 bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery); 831 832 /* we re-scan all devices, not just the ones connected to this 833 * socket. This does not matter, though. */ 834 ret = bus_rescan_devices(&pcmcia_bus_type); 835 if (ret) 836 printk(KERN_INFO "pcmcia: bus_rescan_devices failed\n"); 837 } 838 839 #ifdef CONFIG_PCMCIA_LOAD_CIS 840 841 /** 842 * pcmcia_load_firmware - load CIS from userspace if device-provided is broken 843 * @dev - the pcmcia device which needs a CIS override 844 * @filename - requested filename in /lib/firmware/ 845 * 846 * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if 847 * the one provided by the card is broken. The firmware files reside in 848 * /lib/firmware/ in userspace. 849 */ 850 static int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename) 851 { 852 struct pcmcia_socket *s = dev->socket; 853 const struct firmware *fw; 854 char path[20]; 855 int ret = -ENOMEM; 856 int no_funcs; 857 int old_funcs; 858 cisdump_t *cis; 859 cistpl_longlink_mfc_t mfc; 860 861 if (!filename) 862 return -EINVAL; 863 864 ds_dbg(1, "trying to load CIS file %s\n", filename); 865 866 if (strlen(filename) > 14) { 867 printk(KERN_WARNING "pcmcia: CIS filename is too long\n"); 868 return -EINVAL; 869 } 870 871 snprintf(path, 20, "%s", filename); 872 873 if (request_firmware(&fw, path, &dev->dev) == 0) { 874 if (fw->size >= CISTPL_MAX_CIS_SIZE) { 875 ret = -EINVAL; 876 printk(KERN_ERR "pcmcia: CIS override is too big\n"); 877 goto release; 878 } 879 880 cis = kzalloc(sizeof(cisdump_t), GFP_KERNEL); 881 if (!cis) { 882 ret = -ENOMEM; 883 goto release; 884 } 885 886 cis->Length = fw->size + 1; 887 memcpy(cis->Data, fw->data, fw->size); 888 889 if (!pcmcia_replace_cis(s, cis)) 890 ret = 0; 891 else { 892 printk(KERN_ERR "pcmcia: CIS override failed\n"); 893 goto release; 894 } 895 896 897 /* update information */ 898 pcmcia_device_query(dev); 899 900 /* does this cis override add or remove functions? */ 901 old_funcs = s->functions; 902 903 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc)) 904 no_funcs = mfc.nfn; 905 else 906 no_funcs = 1; 907 s->functions = no_funcs; 908 909 if (old_funcs > no_funcs) 910 pcmcia_card_remove(s, dev); 911 else if (no_funcs > old_funcs) 912 pcmcia_add_device_later(s, 1); 913 } 914 release: 915 release_firmware(fw); 916 917 return (ret); 918 } 919 920 #else /* !CONFIG_PCMCIA_LOAD_CIS */ 921 922 static inline int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename) 923 { 924 return -ENODEV; 925 } 926 927 #endif 928 929 930 static inline int pcmcia_devmatch(struct pcmcia_device *dev, 931 struct pcmcia_device_id *did) 932 { 933 if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) { 934 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id)) 935 return 0; 936 } 937 938 if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) { 939 if ((!dev->has_card_id) || (dev->card_id != did->card_id)) 940 return 0; 941 } 942 943 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) { 944 if (dev->func != did->function) 945 return 0; 946 } 947 948 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) { 949 if (!dev->prod_id[0]) 950 return 0; 951 if (strcmp(did->prod_id[0], dev->prod_id[0])) 952 return 0; 953 } 954 955 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) { 956 if (!dev->prod_id[1]) 957 return 0; 958 if (strcmp(did->prod_id[1], dev->prod_id[1])) 959 return 0; 960 } 961 962 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) { 963 if (!dev->prod_id[2]) 964 return 0; 965 if (strcmp(did->prod_id[2], dev->prod_id[2])) 966 return 0; 967 } 968 969 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) { 970 if (!dev->prod_id[3]) 971 return 0; 972 if (strcmp(did->prod_id[3], dev->prod_id[3])) 973 return 0; 974 } 975 976 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) { 977 if (dev->device_no != did->device_no) 978 return 0; 979 } 980 981 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) { 982 if ((!dev->has_func_id) || (dev->func_id != did->func_id)) 983 return 0; 984 985 /* if this is a pseudo-multi-function device, 986 * we need explicit matches */ 987 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) 988 return 0; 989 if (dev->device_no) 990 return 0; 991 992 /* also, FUNC_ID matching needs to be activated by userspace 993 * after it has re-checked that there is no possible module 994 * with a prod_id/manf_id/card_id match. 995 */ 996 ds_dbg(0, "skipping FUNC_ID match for %s until userspace " 997 "interaction\n", dev->dev.bus_id); 998 if (!dev->allow_func_id_match) 999 return 0; 1000 } 1001 1002 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) { 1003 ds_dbg(0, "device %s needs a fake CIS\n", dev->dev.bus_id); 1004 if (!dev->socket->fake_cis) 1005 pcmcia_load_firmware(dev, did->cisfile); 1006 1007 if (!dev->socket->fake_cis) 1008 return 0; 1009 } 1010 1011 if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) { 1012 int i; 1013 for (i=0; i<4; i++) 1014 if (dev->prod_id[i]) 1015 return 0; 1016 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id) 1017 return 0; 1018 } 1019 1020 dev->dev.driver_data = (void *) did; 1021 1022 return 1; 1023 } 1024 1025 1026 static int pcmcia_bus_match(struct device * dev, struct device_driver * drv) { 1027 struct pcmcia_device * p_dev = to_pcmcia_dev(dev); 1028 struct pcmcia_driver * p_drv = to_pcmcia_drv(drv); 1029 struct pcmcia_device_id *did = p_drv->id_table; 1030 struct pcmcia_dynid *dynid; 1031 1032 /* match dynamic devices first */ 1033 spin_lock(&p_drv->dynids.lock); 1034 list_for_each_entry(dynid, &p_drv->dynids.list, node) { 1035 ds_dbg(3, "trying to match %s to %s\n", dev->bus_id, 1036 drv->name); 1037 if (pcmcia_devmatch(p_dev, &dynid->id)) { 1038 ds_dbg(0, "matched %s to %s\n", dev->bus_id, 1039 drv->name); 1040 spin_unlock(&p_drv->dynids.lock); 1041 return 1; 1042 } 1043 } 1044 spin_unlock(&p_drv->dynids.lock); 1045 1046 #ifdef CONFIG_PCMCIA_IOCTL 1047 /* matching by cardmgr */ 1048 if (p_dev->cardmgr == p_drv) { 1049 ds_dbg(0, "cardmgr matched %s to %s\n", dev->bus_id, 1050 drv->name); 1051 return 1; 1052 } 1053 #endif 1054 1055 while (did && did->match_flags) { 1056 ds_dbg(3, "trying to match %s to %s\n", dev->bus_id, 1057 drv->name); 1058 if (pcmcia_devmatch(p_dev, did)) { 1059 ds_dbg(0, "matched %s to %s\n", dev->bus_id, 1060 drv->name); 1061 return 1; 1062 } 1063 did++; 1064 } 1065 1066 return 0; 1067 } 1068 1069 #ifdef CONFIG_HOTPLUG 1070 1071 static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env) 1072 { 1073 struct pcmcia_device *p_dev; 1074 int i; 1075 u32 hash[4] = { 0, 0, 0, 0}; 1076 1077 if (!dev) 1078 return -ENODEV; 1079 1080 p_dev = to_pcmcia_dev(dev); 1081 1082 /* calculate hashes */ 1083 for (i=0; i<4; i++) { 1084 if (!p_dev->prod_id[i]) 1085 continue; 1086 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i])); 1087 } 1088 1089 if (add_uevent_var(env, "SOCKET_NO=%u", p_dev->socket->sock)) 1090 return -ENOMEM; 1091 1092 if (add_uevent_var(env, "DEVICE_NO=%02X", p_dev->device_no)) 1093 return -ENOMEM; 1094 1095 if (add_uevent_var(env, "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X" 1096 "pa%08Xpb%08Xpc%08Xpd%08X", 1097 p_dev->has_manf_id ? p_dev->manf_id : 0, 1098 p_dev->has_card_id ? p_dev->card_id : 0, 1099 p_dev->has_func_id ? p_dev->func_id : 0, 1100 p_dev->func, 1101 p_dev->device_no, 1102 hash[0], 1103 hash[1], 1104 hash[2], 1105 hash[3])) 1106 return -ENOMEM; 1107 1108 return 0; 1109 } 1110 1111 #else 1112 1113 static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env) 1114 { 1115 return -ENODEV; 1116 } 1117 1118 #endif 1119 1120 /************************ runtime PM support ***************************/ 1121 1122 static int pcmcia_dev_suspend(struct device *dev, pm_message_t state); 1123 static int pcmcia_dev_resume(struct device *dev); 1124 1125 static int runtime_suspend(struct device *dev) 1126 { 1127 int rc; 1128 1129 down(&dev->sem); 1130 rc = pcmcia_dev_suspend(dev, PMSG_SUSPEND); 1131 up(&dev->sem); 1132 if (!rc) 1133 dev->power.power_state.event = PM_EVENT_SUSPEND; 1134 return rc; 1135 } 1136 1137 static void runtime_resume(struct device *dev) 1138 { 1139 int rc; 1140 1141 down(&dev->sem); 1142 rc = pcmcia_dev_resume(dev); 1143 up(&dev->sem); 1144 if (!rc) 1145 dev->power.power_state.event = PM_EVENT_ON; 1146 } 1147 1148 /************************ per-device sysfs output ***************************/ 1149 1150 #define pcmcia_device_attr(field, test, format) \ 1151 static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf) \ 1152 { \ 1153 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \ 1154 return p_dev->test ? sprintf (buf, format, p_dev->field) : -ENODEV; \ 1155 } 1156 1157 #define pcmcia_device_stringattr(name, field) \ 1158 static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf) \ 1159 { \ 1160 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \ 1161 return p_dev->field ? sprintf (buf, "%s\n", p_dev->field) : -ENODEV; \ 1162 } 1163 1164 pcmcia_device_attr(func, socket, "0x%02x\n"); 1165 pcmcia_device_attr(func_id, has_func_id, "0x%02x\n"); 1166 pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n"); 1167 pcmcia_device_attr(card_id, has_card_id, "0x%04x\n"); 1168 pcmcia_device_stringattr(prod_id1, prod_id[0]); 1169 pcmcia_device_stringattr(prod_id2, prod_id[1]); 1170 pcmcia_device_stringattr(prod_id3, prod_id[2]); 1171 pcmcia_device_stringattr(prod_id4, prod_id[3]); 1172 1173 1174 static ssize_t pcmcia_show_pm_state(struct device *dev, struct device_attribute *attr, char *buf) 1175 { 1176 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1177 1178 if (p_dev->suspended) 1179 return sprintf(buf, "off\n"); 1180 else 1181 return sprintf(buf, "on\n"); 1182 } 1183 1184 static ssize_t pcmcia_store_pm_state(struct device *dev, struct device_attribute *attr, 1185 const char *buf, size_t count) 1186 { 1187 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1188 int ret = 0; 1189 1190 if (!count) 1191 return -EINVAL; 1192 1193 if ((!p_dev->suspended) && !strncmp(buf, "off", 3)) 1194 ret = runtime_suspend(dev); 1195 else if (p_dev->suspended && !strncmp(buf, "on", 2)) 1196 runtime_resume(dev); 1197 1198 return ret ? ret : count; 1199 } 1200 1201 1202 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf) 1203 { 1204 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1205 int i; 1206 u32 hash[4] = { 0, 0, 0, 0}; 1207 1208 /* calculate hashes */ 1209 for (i=0; i<4; i++) { 1210 if (!p_dev->prod_id[i]) 1211 continue; 1212 hash[i] = crc32(0,p_dev->prod_id[i],strlen(p_dev->prod_id[i])); 1213 } 1214 return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X" 1215 "pa%08Xpb%08Xpc%08Xpd%08X\n", 1216 p_dev->has_manf_id ? p_dev->manf_id : 0, 1217 p_dev->has_card_id ? p_dev->card_id : 0, 1218 p_dev->has_func_id ? p_dev->func_id : 0, 1219 p_dev->func, p_dev->device_no, 1220 hash[0], hash[1], hash[2], hash[3]); 1221 } 1222 1223 static ssize_t pcmcia_store_allow_func_id_match(struct device *dev, 1224 struct device_attribute *attr, const char *buf, size_t count) 1225 { 1226 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1227 int ret; 1228 1229 if (!count) 1230 return -EINVAL; 1231 1232 mutex_lock(&p_dev->socket->skt_mutex); 1233 p_dev->allow_func_id_match = 1; 1234 mutex_unlock(&p_dev->socket->skt_mutex); 1235 1236 ret = bus_rescan_devices(&pcmcia_bus_type); 1237 if (ret) 1238 printk(KERN_INFO "pcmcia: bus_rescan_devices failed after " 1239 "allowing func_id matches\n"); 1240 1241 return count; 1242 } 1243 1244 static struct device_attribute pcmcia_dev_attrs[] = { 1245 __ATTR(function, 0444, func_show, NULL), 1246 __ATTR(pm_state, 0644, pcmcia_show_pm_state, pcmcia_store_pm_state), 1247 __ATTR_RO(func_id), 1248 __ATTR_RO(manf_id), 1249 __ATTR_RO(card_id), 1250 __ATTR_RO(prod_id1), 1251 __ATTR_RO(prod_id2), 1252 __ATTR_RO(prod_id3), 1253 __ATTR_RO(prod_id4), 1254 __ATTR_RO(modalias), 1255 __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match), 1256 __ATTR_NULL, 1257 }; 1258 1259 /* PM support, also needed for reset */ 1260 1261 static int pcmcia_dev_suspend(struct device * dev, pm_message_t state) 1262 { 1263 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1264 struct pcmcia_driver *p_drv = NULL; 1265 int ret = 0; 1266 1267 ds_dbg(2, "suspending %s\n", dev->bus_id); 1268 1269 if (dev->driver) 1270 p_drv = to_pcmcia_drv(dev->driver); 1271 1272 if (!p_drv) 1273 goto out; 1274 1275 if (p_drv->suspend) { 1276 ret = p_drv->suspend(p_dev); 1277 if (ret) { 1278 printk(KERN_ERR "pcmcia: device %s (driver %s) did " 1279 "not want to go to sleep (%d)\n", 1280 p_dev->devname, p_drv->drv.name, ret); 1281 goto out; 1282 } 1283 } 1284 1285 if (p_dev->device_no == p_dev->func) { 1286 ds_dbg(2, "releasing configuration for %s\n", dev->bus_id); 1287 pcmcia_release_configuration(p_dev); 1288 } 1289 1290 out: 1291 if (!ret) 1292 p_dev->suspended = 1; 1293 return ret; 1294 } 1295 1296 1297 static int pcmcia_dev_resume(struct device * dev) 1298 { 1299 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1300 struct pcmcia_driver *p_drv = NULL; 1301 int ret = 0; 1302 1303 ds_dbg(2, "resuming %s\n", dev->bus_id); 1304 1305 if (dev->driver) 1306 p_drv = to_pcmcia_drv(dev->driver); 1307 1308 if (!p_drv) 1309 goto out; 1310 1311 if (p_dev->device_no == p_dev->func) { 1312 ds_dbg(2, "requesting configuration for %s\n", dev->bus_id); 1313 ret = pcmcia_request_configuration(p_dev, &p_dev->conf); 1314 if (ret) 1315 goto out; 1316 } 1317 1318 if (p_drv->resume) 1319 ret = p_drv->resume(p_dev); 1320 1321 out: 1322 if (!ret) 1323 p_dev->suspended = 0; 1324 return ret; 1325 } 1326 1327 1328 static int pcmcia_bus_suspend_callback(struct device *dev, void * _data) 1329 { 1330 struct pcmcia_socket *skt = _data; 1331 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1332 1333 if (p_dev->socket != skt || p_dev->suspended) 1334 return 0; 1335 1336 return runtime_suspend(dev); 1337 } 1338 1339 static int pcmcia_bus_resume_callback(struct device *dev, void * _data) 1340 { 1341 struct pcmcia_socket *skt = _data; 1342 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1343 1344 if (p_dev->socket != skt || !p_dev->suspended) 1345 return 0; 1346 1347 runtime_resume(dev); 1348 1349 return 0; 1350 } 1351 1352 static int pcmcia_bus_resume(struct pcmcia_socket *skt) 1353 { 1354 ds_dbg(2, "resuming socket %d\n", skt->sock); 1355 bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback); 1356 return 0; 1357 } 1358 1359 static int pcmcia_bus_suspend(struct pcmcia_socket *skt) 1360 { 1361 ds_dbg(2, "suspending socket %d\n", skt->sock); 1362 if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt, 1363 pcmcia_bus_suspend_callback)) { 1364 pcmcia_bus_resume(skt); 1365 return -EIO; 1366 } 1367 return 0; 1368 } 1369 1370 1371 /*====================================================================== 1372 1373 The card status event handler. 1374 1375 ======================================================================*/ 1376 1377 /* Normally, the event is passed to individual drivers after 1378 * informing userspace. Only for CS_EVENT_CARD_REMOVAL this 1379 * is inversed to maintain historic compatibility. 1380 */ 1381 1382 static int ds_event(struct pcmcia_socket *skt, event_t event, int priority) 1383 { 1384 struct pcmcia_socket *s = pcmcia_get_socket(skt); 1385 1386 if (!s) { 1387 printk(KERN_ERR "PCMCIA obtaining reference to socket %p " \ 1388 "failed, event 0x%x lost!\n", skt, event); 1389 return -ENODEV; 1390 } 1391 1392 ds_dbg(1, "ds_event(0x%06x, %d, 0x%p)\n", 1393 event, priority, skt); 1394 1395 switch (event) { 1396 case CS_EVENT_CARD_REMOVAL: 1397 s->pcmcia_state.present = 0; 1398 pcmcia_card_remove(skt, NULL); 1399 handle_event(skt, event); 1400 break; 1401 1402 case CS_EVENT_CARD_INSERTION: 1403 s->pcmcia_state.present = 1; 1404 pcmcia_card_add(skt); 1405 handle_event(skt, event); 1406 break; 1407 1408 case CS_EVENT_EJECTION_REQUEST: 1409 break; 1410 1411 case CS_EVENT_PM_SUSPEND: 1412 case CS_EVENT_PM_RESUME: 1413 case CS_EVENT_RESET_PHYSICAL: 1414 case CS_EVENT_CARD_RESET: 1415 default: 1416 handle_event(skt, event); 1417 break; 1418 } 1419 1420 pcmcia_put_socket(s); 1421 1422 return 0; 1423 } /* ds_event */ 1424 1425 1426 struct pcmcia_device * pcmcia_dev_present(struct pcmcia_device *_p_dev) 1427 { 1428 struct pcmcia_device *p_dev; 1429 struct pcmcia_device *ret = NULL; 1430 1431 p_dev = pcmcia_get_dev(_p_dev); 1432 if (!p_dev) 1433 return NULL; 1434 1435 if (!p_dev->socket->pcmcia_state.present) 1436 goto out; 1437 1438 if (p_dev->_removed) 1439 goto out; 1440 1441 if (p_dev->suspended) 1442 goto out; 1443 1444 ret = p_dev; 1445 out: 1446 pcmcia_put_dev(p_dev); 1447 return ret; 1448 } 1449 EXPORT_SYMBOL(pcmcia_dev_present); 1450 1451 1452 static struct pcmcia_callback pcmcia_bus_callback = { 1453 .owner = THIS_MODULE, 1454 .event = ds_event, 1455 .requery = pcmcia_bus_rescan, 1456 .suspend = pcmcia_bus_suspend, 1457 .resume = pcmcia_bus_resume, 1458 }; 1459 1460 static int __devinit pcmcia_bus_add_socket(struct device *dev, 1461 struct class_interface *class_intf) 1462 { 1463 struct pcmcia_socket *socket = dev_get_drvdata(dev); 1464 int ret; 1465 1466 socket = pcmcia_get_socket(socket); 1467 if (!socket) { 1468 printk(KERN_ERR "PCMCIA obtaining reference to socket %p failed\n", socket); 1469 return -ENODEV; 1470 } 1471 1472 /* 1473 * Ugly. But we want to wait for the socket threads to have started up. 1474 * We really should let the drivers themselves drive some of this.. 1475 */ 1476 msleep(250); 1477 1478 #ifdef CONFIG_PCMCIA_IOCTL 1479 init_waitqueue_head(&socket->queue); 1480 #endif 1481 INIT_LIST_HEAD(&socket->devices_list); 1482 INIT_WORK(&socket->device_add, pcmcia_delayed_add_device); 1483 memset(&socket->pcmcia_state, 0, sizeof(u8)); 1484 socket->device_count = 0; 1485 1486 ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback); 1487 if (ret) { 1488 printk(KERN_ERR "PCMCIA registration PCCard core failed for socket %p\n", socket); 1489 pcmcia_put_socket(socket); 1490 return (ret); 1491 } 1492 1493 return 0; 1494 } 1495 1496 static void pcmcia_bus_remove_socket(struct device *dev, 1497 struct class_interface *class_intf) 1498 { 1499 struct pcmcia_socket *socket = dev_get_drvdata(dev); 1500 1501 if (!socket) 1502 return; 1503 1504 socket->pcmcia_state.dead = 1; 1505 pccard_register_pcmcia(socket, NULL); 1506 1507 /* unregister any unbound devices */ 1508 mutex_lock(&socket->skt_mutex); 1509 pcmcia_card_remove(socket, NULL); 1510 mutex_unlock(&socket->skt_mutex); 1511 1512 pcmcia_put_socket(socket); 1513 1514 return; 1515 } 1516 1517 1518 /* the pcmcia_bus_interface is used to handle pcmcia socket devices */ 1519 static struct class_interface pcmcia_bus_interface = { 1520 .class = &pcmcia_socket_class, 1521 .add_dev = &pcmcia_bus_add_socket, 1522 .remove_dev = &pcmcia_bus_remove_socket, 1523 }; 1524 1525 1526 struct bus_type pcmcia_bus_type = { 1527 .name = "pcmcia", 1528 .uevent = pcmcia_bus_uevent, 1529 .match = pcmcia_bus_match, 1530 .dev_attrs = pcmcia_dev_attrs, 1531 .probe = pcmcia_device_probe, 1532 .remove = pcmcia_device_remove, 1533 .suspend = pcmcia_dev_suspend, 1534 .resume = pcmcia_dev_resume, 1535 }; 1536 1537 1538 static int __init init_pcmcia_bus(void) 1539 { 1540 int ret; 1541 1542 spin_lock_init(&pcmcia_dev_list_lock); 1543 1544 ret = bus_register(&pcmcia_bus_type); 1545 if (ret < 0) { 1546 printk(KERN_WARNING "pcmcia: bus_register error: %d\n", ret); 1547 return ret; 1548 } 1549 ret = class_interface_register(&pcmcia_bus_interface); 1550 if (ret < 0) { 1551 printk(KERN_WARNING 1552 "pcmcia: class_interface_register error: %d\n", ret); 1553 bus_unregister(&pcmcia_bus_type); 1554 return ret; 1555 } 1556 1557 pcmcia_setup_ioctl(); 1558 1559 return 0; 1560 } 1561 fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that 1562 * pcmcia_socket_class is already registered */ 1563 1564 1565 static void __exit exit_pcmcia_bus(void) 1566 { 1567 pcmcia_cleanup_ioctl(); 1568 1569 class_interface_unregister(&pcmcia_bus_interface); 1570 1571 bus_unregister(&pcmcia_bus_type); 1572 } 1573 module_exit(exit_pcmcia_bus); 1574 1575 1576 MODULE_ALIAS("ds"); 1577