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 = driver_create_file(&drv->drv, &driver_attr_new_id); 316 return error; 317 } 318 319 320 /** 321 * pcmcia_register_driver - register a PCMCIA driver with the bus core 322 * @driver: the &driver being registered 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 * @driver: the &driver being unregistered 358 */ 359 void pcmcia_unregister_driver(struct pcmcia_driver *driver) 360 { 361 ds_dbg(3, "unregistering driver %s\n", driver->drv.name); 362 driver_unregister(&driver->drv); 363 pcmcia_free_dynids(driver); 364 } 365 EXPORT_SYMBOL(pcmcia_unregister_driver); 366 367 368 /* pcmcia_device handling */ 369 370 struct pcmcia_device * pcmcia_get_dev(struct pcmcia_device *p_dev) 371 { 372 struct device *tmp_dev; 373 tmp_dev = get_device(&p_dev->dev); 374 if (!tmp_dev) 375 return NULL; 376 return to_pcmcia_dev(tmp_dev); 377 } 378 379 void pcmcia_put_dev(struct pcmcia_device *p_dev) 380 { 381 if (p_dev) 382 put_device(&p_dev->dev); 383 } 384 385 static void pcmcia_release_function(struct kref *ref) 386 { 387 struct config_t *c = container_of(ref, struct config_t, ref); 388 ds_dbg(1, "releasing config_t\n"); 389 kfree(c); 390 } 391 392 static void pcmcia_release_dev(struct device *dev) 393 { 394 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 395 ds_dbg(1, "releasing device %s\n", p_dev->dev.bus_id); 396 pcmcia_put_socket(p_dev->socket); 397 kfree(p_dev->devname); 398 kref_put(&p_dev->function_config->ref, pcmcia_release_function); 399 kfree(p_dev); 400 } 401 402 static void pcmcia_add_device_later(struct pcmcia_socket *s, int mfc) 403 { 404 if (!s->pcmcia_state.device_add_pending) { 405 ds_dbg(1, "scheduling to add %s secondary" 406 " device to %d\n", mfc ? "mfc" : "pfc", s->sock); 407 s->pcmcia_state.device_add_pending = 1; 408 s->pcmcia_state.mfc_pfc = mfc; 409 schedule_work(&s->device_add); 410 } 411 return; 412 } 413 414 static int pcmcia_device_probe(struct device * dev) 415 { 416 struct pcmcia_device *p_dev; 417 struct pcmcia_driver *p_drv; 418 struct pcmcia_device_id *did; 419 struct pcmcia_socket *s; 420 cistpl_config_t cis_config; 421 int ret = 0; 422 423 dev = get_device(dev); 424 if (!dev) 425 return -ENODEV; 426 427 p_dev = to_pcmcia_dev(dev); 428 p_drv = to_pcmcia_drv(dev->driver); 429 s = p_dev->socket; 430 431 ds_dbg(1, "trying to bind %s to %s\n", p_dev->dev.bus_id, 432 p_drv->drv.name); 433 434 if ((!p_drv->probe) || (!p_dev->function_config) || 435 (!try_module_get(p_drv->owner))) { 436 ret = -EINVAL; 437 goto put_dev; 438 } 439 440 /* set up some more device information */ 441 ret = pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_CONFIG, 442 &cis_config); 443 if (!ret) { 444 p_dev->conf.ConfigBase = cis_config.base; 445 p_dev->conf.Present = cis_config.rmask[0]; 446 } else { 447 printk(KERN_INFO "pcmcia: could not parse base and rmask0 of CIS\n"); 448 p_dev->conf.ConfigBase = 0; 449 p_dev->conf.Present = 0; 450 } 451 452 ret = p_drv->probe(p_dev); 453 if (ret) { 454 ds_dbg(1, "binding %s to %s failed with %d\n", 455 p_dev->dev.bus_id, p_drv->drv.name, ret); 456 goto put_module; 457 } 458 459 /* handle pseudo multifunction devices: 460 * there are at most two pseudo multifunction devices. 461 * if we're matching against the first, schedule a 462 * call which will then check whether there are two 463 * pseudo devices, and if not, add the second one. 464 */ 465 did = p_dev->dev.driver_data; 466 if (did && (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) && 467 (p_dev->socket->device_count == 1) && (p_dev->device_no == 0)) 468 pcmcia_add_device_later(p_dev->socket, 0); 469 470 put_module: 471 if (ret) 472 module_put(p_drv->owner); 473 put_dev: 474 if (ret) 475 put_device(dev); 476 return (ret); 477 } 478 479 480 /* 481 * Removes a PCMCIA card from the device tree and socket list. 482 */ 483 static void pcmcia_card_remove(struct pcmcia_socket *s, struct pcmcia_device *leftover) 484 { 485 struct pcmcia_device *p_dev; 486 struct pcmcia_device *tmp; 487 unsigned long flags; 488 489 ds_dbg(2, "pcmcia_card_remove(%d) %s\n", s->sock, 490 leftover ? leftover->devname : ""); 491 492 if (!leftover) 493 s->device_count = 0; 494 else 495 s->device_count = 1; 496 497 /* unregister all pcmcia_devices registered with this socket, except leftover */ 498 list_for_each_entry_safe(p_dev, tmp, &s->devices_list, socket_device_list) { 499 if (p_dev == leftover) 500 continue; 501 502 spin_lock_irqsave(&pcmcia_dev_list_lock, flags); 503 list_del(&p_dev->socket_device_list); 504 p_dev->_removed=1; 505 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags); 506 507 ds_dbg(2, "unregistering device %s\n", p_dev->dev.bus_id); 508 device_unregister(&p_dev->dev); 509 } 510 511 return; 512 } 513 514 static int pcmcia_device_remove(struct device * dev) 515 { 516 struct pcmcia_device *p_dev; 517 struct pcmcia_driver *p_drv; 518 struct pcmcia_device_id *did; 519 int i; 520 521 p_dev = to_pcmcia_dev(dev); 522 p_drv = to_pcmcia_drv(dev->driver); 523 524 ds_dbg(1, "removing device %s\n", p_dev->dev.bus_id); 525 526 /* If we're removing the primary module driving a 527 * pseudo multi-function card, we need to unbind 528 * all devices 529 */ 530 did = p_dev->dev.driver_data; 531 if (did && (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) && 532 (p_dev->socket->device_count != 0) && 533 (p_dev->device_no == 0)) 534 pcmcia_card_remove(p_dev->socket, p_dev); 535 536 /* detach the "instance" */ 537 if (!p_drv) 538 return 0; 539 540 if (p_drv->remove) 541 p_drv->remove(p_dev); 542 543 p_dev->dev_node = NULL; 544 545 /* check for proper unloading */ 546 if (p_dev->_irq || p_dev->_io || p_dev->_locked) 547 printk(KERN_INFO "pcmcia: driver %s did not release config properly\n", 548 p_drv->drv.name); 549 550 for (i = 0; i < MAX_WIN; i++) 551 if (p_dev->_win & CLIENT_WIN_REQ(i)) 552 printk(KERN_INFO "pcmcia: driver %s did not release windows properly\n", 553 p_drv->drv.name); 554 555 /* references from pcmcia_probe_device */ 556 pcmcia_put_dev(p_dev); 557 module_put(p_drv->owner); 558 559 return 0; 560 } 561 562 563 /* 564 * pcmcia_device_query -- determine information about a pcmcia device 565 */ 566 static int pcmcia_device_query(struct pcmcia_device *p_dev) 567 { 568 cistpl_manfid_t manf_id; 569 cistpl_funcid_t func_id; 570 cistpl_vers_1_t *vers1; 571 unsigned int i; 572 573 vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL); 574 if (!vers1) 575 return -ENOMEM; 576 577 if (!pccard_read_tuple(p_dev->socket, p_dev->func, 578 CISTPL_MANFID, &manf_id)) { 579 p_dev->manf_id = manf_id.manf; 580 p_dev->card_id = manf_id.card; 581 p_dev->has_manf_id = 1; 582 p_dev->has_card_id = 1; 583 } 584 585 if (!pccard_read_tuple(p_dev->socket, p_dev->func, 586 CISTPL_FUNCID, &func_id)) { 587 p_dev->func_id = func_id.func; 588 p_dev->has_func_id = 1; 589 } else { 590 /* rule of thumb: cards with no FUNCID, but with 591 * common memory device geometry information, are 592 * probably memory cards (from pcmcia-cs) */ 593 cistpl_device_geo_t *devgeo; 594 595 devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL); 596 if (!devgeo) { 597 kfree(vers1); 598 return -ENOMEM; 599 } 600 if (!pccard_read_tuple(p_dev->socket, p_dev->func, 601 CISTPL_DEVICE_GEO, devgeo)) { 602 ds_dbg(0, "mem device geometry probably means " 603 "FUNCID_MEMORY\n"); 604 p_dev->func_id = CISTPL_FUNCID_MEMORY; 605 p_dev->has_func_id = 1; 606 } 607 kfree(devgeo); 608 } 609 610 if (!pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_VERS_1, 611 vers1)) { 612 for (i=0; i < vers1->ns; i++) { 613 char *tmp; 614 unsigned int length; 615 616 tmp = vers1->str + vers1->ofs[i]; 617 618 length = strlen(tmp) + 1; 619 if ((length < 2) || (length > 255)) 620 continue; 621 622 p_dev->prod_id[i] = kmalloc(sizeof(char) * length, 623 GFP_KERNEL); 624 if (!p_dev->prod_id[i]) 625 continue; 626 627 p_dev->prod_id[i] = strncpy(p_dev->prod_id[i], 628 tmp, length); 629 } 630 } 631 632 kfree(vers1); 633 return 0; 634 } 635 636 637 /* device_add_lock is needed to avoid double registration by cardmgr and kernel. 638 * Serializes pcmcia_device_add; will most likely be removed in future. 639 * 640 * While it has the caveat that adding new PCMCIA devices inside(!) device_register() 641 * won't work, this doesn't matter much at the moment: the driver core doesn't 642 * support it either. 643 */ 644 static DEFINE_MUTEX(device_add_lock); 645 646 struct pcmcia_device * pcmcia_device_add(struct pcmcia_socket *s, unsigned int function) 647 { 648 struct pcmcia_device *p_dev, *tmp_dev; 649 unsigned long flags; 650 int bus_id_len; 651 652 s = pcmcia_get_socket(s); 653 if (!s) 654 return NULL; 655 656 mutex_lock(&device_add_lock); 657 658 ds_dbg(3, "adding device to %d, function %d\n", s->sock, function); 659 660 /* max of 4 devices per card */ 661 if (s->device_count == 4) 662 goto err_put; 663 664 p_dev = kzalloc(sizeof(struct pcmcia_device), GFP_KERNEL); 665 if (!p_dev) 666 goto err_put; 667 668 p_dev->socket = s; 669 p_dev->device_no = (s->device_count++); 670 p_dev->func = function; 671 672 p_dev->dev.bus = &pcmcia_bus_type; 673 p_dev->dev.parent = s->dev.parent; 674 p_dev->dev.release = pcmcia_release_dev; 675 /* by default don't allow DMA */ 676 p_dev->dma_mask = DMA_MASK_NONE; 677 p_dev->dev.dma_mask = &p_dev->dma_mask; 678 bus_id_len = sprintf (p_dev->dev.bus_id, "%d.%d", p_dev->socket->sock, p_dev->device_no); 679 680 p_dev->devname = kmalloc(6 + bus_id_len + 1, GFP_KERNEL); 681 if (!p_dev->devname) 682 goto err_free; 683 sprintf (p_dev->devname, "pcmcia%s", p_dev->dev.bus_id); 684 ds_dbg(3, "devname is %s\n", p_dev->devname); 685 686 spin_lock_irqsave(&pcmcia_dev_list_lock, flags); 687 688 /* 689 * p_dev->function_config must be the same for all card functions. 690 * Note that this is serialized by the device_add_lock, so that 691 * only one such struct will be created. 692 */ 693 list_for_each_entry(tmp_dev, &s->devices_list, socket_device_list) 694 if (p_dev->func == tmp_dev->func) { 695 p_dev->function_config = tmp_dev->function_config; 696 kref_get(&p_dev->function_config->ref); 697 } 698 699 /* Add to the list in pcmcia_bus_socket */ 700 list_add(&p_dev->socket_device_list, &s->devices_list); 701 702 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags); 703 704 if (!p_dev->function_config) { 705 ds_dbg(3, "creating config_t for %s\n", p_dev->dev.bus_id); 706 p_dev->function_config = kzalloc(sizeof(struct config_t), 707 GFP_KERNEL); 708 if (!p_dev->function_config) 709 goto err_unreg; 710 kref_init(&p_dev->function_config->ref); 711 } 712 713 printk(KERN_NOTICE "pcmcia: registering new device %s\n", 714 p_dev->devname); 715 716 pcmcia_device_query(p_dev); 717 718 if (device_register(&p_dev->dev)) 719 goto err_unreg; 720 721 mutex_unlock(&device_add_lock); 722 723 return p_dev; 724 725 err_unreg: 726 spin_lock_irqsave(&pcmcia_dev_list_lock, flags); 727 list_del(&p_dev->socket_device_list); 728 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags); 729 730 err_free: 731 kfree(p_dev->devname); 732 kfree(p_dev); 733 s->device_count--; 734 err_put: 735 mutex_unlock(&device_add_lock); 736 pcmcia_put_socket(s); 737 738 return NULL; 739 } 740 741 742 static int pcmcia_card_add(struct pcmcia_socket *s) 743 { 744 cisinfo_t cisinfo; 745 cistpl_longlink_mfc_t mfc; 746 unsigned int no_funcs, i; 747 int ret = 0; 748 749 if (!(s->resource_setup_done)) { 750 ds_dbg(3, "no resources available, delaying card_add\n"); 751 return -EAGAIN; /* try again, but later... */ 752 } 753 754 if (pcmcia_validate_mem(s)) { 755 ds_dbg(3, "validating mem resources failed, " 756 "delaying card_add\n"); 757 return -EAGAIN; /* try again, but later... */ 758 } 759 760 ret = pccard_validate_cis(s, BIND_FN_ALL, &cisinfo); 761 if (ret || !cisinfo.Chains) { 762 ds_dbg(0, "invalid CIS or invalid resources\n"); 763 return -ENODEV; 764 } 765 766 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc)) 767 no_funcs = mfc.nfn; 768 else 769 no_funcs = 1; 770 s->functions = no_funcs; 771 772 for (i=0; i < no_funcs; i++) 773 pcmcia_device_add(s, i); 774 775 return (ret); 776 } 777 778 779 static void pcmcia_delayed_add_device(struct work_struct *work) 780 { 781 struct pcmcia_socket *s = 782 container_of(work, struct pcmcia_socket, device_add); 783 ds_dbg(1, "adding additional device to %d\n", s->sock); 784 pcmcia_device_add(s, s->pcmcia_state.mfc_pfc); 785 s->pcmcia_state.device_add_pending = 0; 786 s->pcmcia_state.mfc_pfc = 0; 787 } 788 789 static int pcmcia_requery(struct device *dev, void * _data) 790 { 791 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 792 if (!p_dev->dev.driver) { 793 ds_dbg(1, "update device information for %s\n", 794 p_dev->dev.bus_id); 795 pcmcia_device_query(p_dev); 796 } 797 798 return 0; 799 } 800 801 static void pcmcia_bus_rescan(struct pcmcia_socket *skt, int new_cis) 802 { 803 int no_devices = 0; 804 int ret = 0; 805 unsigned long flags; 806 807 /* must be called with skt_mutex held */ 808 ds_dbg(0, "re-scanning socket %d\n", skt->sock); 809 810 spin_lock_irqsave(&pcmcia_dev_list_lock, flags); 811 if (list_empty(&skt->devices_list)) 812 no_devices = 1; 813 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags); 814 815 /* If this is because of a CIS override, start over */ 816 if (new_cis && !no_devices) 817 pcmcia_card_remove(skt, NULL); 818 819 /* if no devices were added for this socket yet because of 820 * missing resource information or other trouble, we need to 821 * do this now. */ 822 if (no_devices || new_cis) { 823 ret = pcmcia_card_add(skt); 824 if (ret) 825 return; 826 } 827 828 /* some device information might have changed because of a CIS 829 * update or because we can finally read it correctly... so 830 * determine it again, overwriting old values if necessary. */ 831 bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery); 832 833 /* we re-scan all devices, not just the ones connected to this 834 * socket. This does not matter, though. */ 835 ret = bus_rescan_devices(&pcmcia_bus_type); 836 if (ret) 837 printk(KERN_INFO "pcmcia: bus_rescan_devices failed\n"); 838 } 839 840 #ifdef CONFIG_PCMCIA_LOAD_CIS 841 842 /** 843 * pcmcia_load_firmware - load CIS from userspace if device-provided is broken 844 * @dev: the pcmcia device which needs a CIS override 845 * @filename: requested filename in /lib/firmware/ 846 * 847 * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if 848 * the one provided by the card is broken. The firmware files reside in 849 * /lib/firmware/ in userspace. 850 */ 851 static int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename) 852 { 853 struct pcmcia_socket *s = dev->socket; 854 const struct firmware *fw; 855 char path[20]; 856 int ret = -ENOMEM; 857 int no_funcs; 858 int old_funcs; 859 cisdump_t *cis; 860 cistpl_longlink_mfc_t mfc; 861 862 if (!filename) 863 return -EINVAL; 864 865 ds_dbg(1, "trying to load CIS file %s\n", filename); 866 867 if (strlen(filename) > 14) { 868 printk(KERN_WARNING "pcmcia: CIS filename is too long\n"); 869 return -EINVAL; 870 } 871 872 snprintf(path, 20, "%s", filename); 873 874 if (request_firmware(&fw, path, &dev->dev) == 0) { 875 if (fw->size >= CISTPL_MAX_CIS_SIZE) { 876 ret = -EINVAL; 877 printk(KERN_ERR "pcmcia: CIS override is too big\n"); 878 goto release; 879 } 880 881 cis = kzalloc(sizeof(cisdump_t), GFP_KERNEL); 882 if (!cis) { 883 ret = -ENOMEM; 884 goto release; 885 } 886 887 cis->Length = fw->size + 1; 888 memcpy(cis->Data, fw->data, fw->size); 889 890 if (!pcmcia_replace_cis(s, cis)) 891 ret = 0; 892 else { 893 printk(KERN_ERR "pcmcia: CIS override failed\n"); 894 goto release; 895 } 896 897 898 /* update information */ 899 pcmcia_device_query(dev); 900 901 /* does this cis override add or remove functions? */ 902 old_funcs = s->functions; 903 904 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc)) 905 no_funcs = mfc.nfn; 906 else 907 no_funcs = 1; 908 s->functions = no_funcs; 909 910 if (old_funcs > no_funcs) 911 pcmcia_card_remove(s, dev); 912 else if (no_funcs > old_funcs) 913 pcmcia_add_device_later(s, 1); 914 } 915 release: 916 release_firmware(fw); 917 918 return (ret); 919 } 920 921 #else /* !CONFIG_PCMCIA_LOAD_CIS */ 922 923 static inline int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename) 924 { 925 return -ENODEV; 926 } 927 928 #endif 929 930 931 static inline int pcmcia_devmatch(struct pcmcia_device *dev, 932 struct pcmcia_device_id *did) 933 { 934 if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) { 935 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id)) 936 return 0; 937 } 938 939 if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) { 940 if ((!dev->has_card_id) || (dev->card_id != did->card_id)) 941 return 0; 942 } 943 944 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) { 945 if (dev->func != did->function) 946 return 0; 947 } 948 949 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) { 950 if (!dev->prod_id[0]) 951 return 0; 952 if (strcmp(did->prod_id[0], dev->prod_id[0])) 953 return 0; 954 } 955 956 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) { 957 if (!dev->prod_id[1]) 958 return 0; 959 if (strcmp(did->prod_id[1], dev->prod_id[1])) 960 return 0; 961 } 962 963 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) { 964 if (!dev->prod_id[2]) 965 return 0; 966 if (strcmp(did->prod_id[2], dev->prod_id[2])) 967 return 0; 968 } 969 970 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) { 971 if (!dev->prod_id[3]) 972 return 0; 973 if (strcmp(did->prod_id[3], dev->prod_id[3])) 974 return 0; 975 } 976 977 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) { 978 if (dev->device_no != did->device_no) 979 return 0; 980 } 981 982 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) { 983 if ((!dev->has_func_id) || (dev->func_id != did->func_id)) 984 return 0; 985 986 /* if this is a pseudo-multi-function device, 987 * we need explicit matches */ 988 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) 989 return 0; 990 if (dev->device_no) 991 return 0; 992 993 /* also, FUNC_ID matching needs to be activated by userspace 994 * after it has re-checked that there is no possible module 995 * with a prod_id/manf_id/card_id match. 996 */ 997 ds_dbg(0, "skipping FUNC_ID match for %s until userspace " 998 "interaction\n", dev->dev.bus_id); 999 if (!dev->allow_func_id_match) 1000 return 0; 1001 } 1002 1003 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) { 1004 ds_dbg(0, "device %s needs a fake CIS\n", dev->dev.bus_id); 1005 if (!dev->socket->fake_cis) 1006 pcmcia_load_firmware(dev, did->cisfile); 1007 1008 if (!dev->socket->fake_cis) 1009 return 0; 1010 } 1011 1012 if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) { 1013 int i; 1014 for (i=0; i<4; i++) 1015 if (dev->prod_id[i]) 1016 return 0; 1017 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id) 1018 return 0; 1019 } 1020 1021 dev->dev.driver_data = (void *) did; 1022 1023 return 1; 1024 } 1025 1026 1027 static int pcmcia_bus_match(struct device * dev, struct device_driver * drv) { 1028 struct pcmcia_device * p_dev = to_pcmcia_dev(dev); 1029 struct pcmcia_driver * p_drv = to_pcmcia_drv(drv); 1030 struct pcmcia_device_id *did = p_drv->id_table; 1031 struct pcmcia_dynid *dynid; 1032 1033 /* match dynamic devices first */ 1034 spin_lock(&p_drv->dynids.lock); 1035 list_for_each_entry(dynid, &p_drv->dynids.list, node) { 1036 ds_dbg(3, "trying to match %s to %s\n", dev->bus_id, 1037 drv->name); 1038 if (pcmcia_devmatch(p_dev, &dynid->id)) { 1039 ds_dbg(0, "matched %s to %s\n", dev->bus_id, 1040 drv->name); 1041 spin_unlock(&p_drv->dynids.lock); 1042 return 1; 1043 } 1044 } 1045 spin_unlock(&p_drv->dynids.lock); 1046 1047 #ifdef CONFIG_PCMCIA_IOCTL 1048 /* matching by cardmgr */ 1049 if (p_dev->cardmgr == p_drv) { 1050 ds_dbg(0, "cardmgr matched %s to %s\n", dev->bus_id, 1051 drv->name); 1052 return 1; 1053 } 1054 #endif 1055 1056 while (did && did->match_flags) { 1057 ds_dbg(3, "trying to match %s to %s\n", dev->bus_id, 1058 drv->name); 1059 if (pcmcia_devmatch(p_dev, did)) { 1060 ds_dbg(0, "matched %s to %s\n", dev->bus_id, 1061 drv->name); 1062 return 1; 1063 } 1064 did++; 1065 } 1066 1067 return 0; 1068 } 1069 1070 #ifdef CONFIG_HOTPLUG 1071 1072 static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env) 1073 { 1074 struct pcmcia_device *p_dev; 1075 int i; 1076 u32 hash[4] = { 0, 0, 0, 0}; 1077 1078 if (!dev) 1079 return -ENODEV; 1080 1081 p_dev = to_pcmcia_dev(dev); 1082 1083 /* calculate hashes */ 1084 for (i=0; i<4; i++) { 1085 if (!p_dev->prod_id[i]) 1086 continue; 1087 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i])); 1088 } 1089 1090 if (add_uevent_var(env, "SOCKET_NO=%u", p_dev->socket->sock)) 1091 return -ENOMEM; 1092 1093 if (add_uevent_var(env, "DEVICE_NO=%02X", p_dev->device_no)) 1094 return -ENOMEM; 1095 1096 if (add_uevent_var(env, "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X" 1097 "pa%08Xpb%08Xpc%08Xpd%08X", 1098 p_dev->has_manf_id ? p_dev->manf_id : 0, 1099 p_dev->has_card_id ? p_dev->card_id : 0, 1100 p_dev->has_func_id ? p_dev->func_id : 0, 1101 p_dev->func, 1102 p_dev->device_no, 1103 hash[0], 1104 hash[1], 1105 hash[2], 1106 hash[3])) 1107 return -ENOMEM; 1108 1109 return 0; 1110 } 1111 1112 #else 1113 1114 static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env) 1115 { 1116 return -ENODEV; 1117 } 1118 1119 #endif 1120 1121 /************************ runtime PM support ***************************/ 1122 1123 static int pcmcia_dev_suspend(struct device *dev, pm_message_t state); 1124 static int pcmcia_dev_resume(struct device *dev); 1125 1126 static int runtime_suspend(struct device *dev) 1127 { 1128 int rc; 1129 1130 down(&dev->sem); 1131 rc = pcmcia_dev_suspend(dev, PMSG_SUSPEND); 1132 up(&dev->sem); 1133 if (!rc) 1134 dev->power.power_state.event = PM_EVENT_SUSPEND; 1135 return rc; 1136 } 1137 1138 static void runtime_resume(struct device *dev) 1139 { 1140 int rc; 1141 1142 down(&dev->sem); 1143 rc = pcmcia_dev_resume(dev); 1144 up(&dev->sem); 1145 if (!rc) 1146 dev->power.power_state.event = PM_EVENT_ON; 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 ds_dbg(2, "suspending %s\n", dev->bus_id); 1269 1270 if (dev->driver) 1271 p_drv = to_pcmcia_drv(dev->driver); 1272 1273 if (!p_drv) 1274 goto out; 1275 1276 if (p_drv->suspend) { 1277 ret = p_drv->suspend(p_dev); 1278 if (ret) { 1279 printk(KERN_ERR "pcmcia: device %s (driver %s) did " 1280 "not want to go to sleep (%d)\n", 1281 p_dev->devname, p_drv->drv.name, ret); 1282 goto out; 1283 } 1284 } 1285 1286 if (p_dev->device_no == p_dev->func) { 1287 ds_dbg(2, "releasing configuration for %s\n", dev->bus_id); 1288 pcmcia_release_configuration(p_dev); 1289 } 1290 1291 out: 1292 if (!ret) 1293 p_dev->suspended = 1; 1294 return ret; 1295 } 1296 1297 1298 static int pcmcia_dev_resume(struct device * dev) 1299 { 1300 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1301 struct pcmcia_driver *p_drv = NULL; 1302 int ret = 0; 1303 1304 ds_dbg(2, "resuming %s\n", dev->bus_id); 1305 1306 if (dev->driver) 1307 p_drv = to_pcmcia_drv(dev->driver); 1308 1309 if (!p_drv) 1310 goto out; 1311 1312 if (p_dev->device_no == p_dev->func) { 1313 ds_dbg(2, "requesting configuration for %s\n", dev->bus_id); 1314 ret = pcmcia_request_configuration(p_dev, &p_dev->conf); 1315 if (ret) 1316 goto out; 1317 } 1318 1319 if (p_drv->resume) 1320 ret = p_drv->resume(p_dev); 1321 1322 out: 1323 if (!ret) 1324 p_dev->suspended = 0; 1325 return ret; 1326 } 1327 1328 1329 static int pcmcia_bus_suspend_callback(struct device *dev, void * _data) 1330 { 1331 struct pcmcia_socket *skt = _data; 1332 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1333 1334 if (p_dev->socket != skt || p_dev->suspended) 1335 return 0; 1336 1337 return runtime_suspend(dev); 1338 } 1339 1340 static int pcmcia_bus_resume_callback(struct device *dev, void * _data) 1341 { 1342 struct pcmcia_socket *skt = _data; 1343 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1344 1345 if (p_dev->socket != skt || !p_dev->suspended) 1346 return 0; 1347 1348 runtime_resume(dev); 1349 1350 return 0; 1351 } 1352 1353 static int pcmcia_bus_resume(struct pcmcia_socket *skt) 1354 { 1355 ds_dbg(2, "resuming socket %d\n", skt->sock); 1356 bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback); 1357 return 0; 1358 } 1359 1360 static int pcmcia_bus_suspend(struct pcmcia_socket *skt) 1361 { 1362 ds_dbg(2, "suspending socket %d\n", skt->sock); 1363 if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt, 1364 pcmcia_bus_suspend_callback)) { 1365 pcmcia_bus_resume(skt); 1366 return -EIO; 1367 } 1368 return 0; 1369 } 1370 1371 1372 /*====================================================================== 1373 1374 The card status event handler. 1375 1376 ======================================================================*/ 1377 1378 /* Normally, the event is passed to individual drivers after 1379 * informing userspace. Only for CS_EVENT_CARD_REMOVAL this 1380 * is inversed to maintain historic compatibility. 1381 */ 1382 1383 static int ds_event(struct pcmcia_socket *skt, event_t event, int priority) 1384 { 1385 struct pcmcia_socket *s = pcmcia_get_socket(skt); 1386 1387 if (!s) { 1388 printk(KERN_ERR "PCMCIA obtaining reference to socket %p " \ 1389 "failed, event 0x%x lost!\n", skt, event); 1390 return -ENODEV; 1391 } 1392 1393 ds_dbg(1, "ds_event(0x%06x, %d, 0x%p)\n", 1394 event, priority, skt); 1395 1396 switch (event) { 1397 case CS_EVENT_CARD_REMOVAL: 1398 s->pcmcia_state.present = 0; 1399 pcmcia_card_remove(skt, NULL); 1400 handle_event(skt, event); 1401 break; 1402 1403 case CS_EVENT_CARD_INSERTION: 1404 s->pcmcia_state.present = 1; 1405 pcmcia_card_add(skt); 1406 handle_event(skt, event); 1407 break; 1408 1409 case CS_EVENT_EJECTION_REQUEST: 1410 break; 1411 1412 case CS_EVENT_PM_SUSPEND: 1413 case CS_EVENT_PM_RESUME: 1414 case CS_EVENT_RESET_PHYSICAL: 1415 case CS_EVENT_CARD_RESET: 1416 default: 1417 handle_event(skt, event); 1418 break; 1419 } 1420 1421 pcmcia_put_socket(s); 1422 1423 return 0; 1424 } /* ds_event */ 1425 1426 1427 struct pcmcia_device * pcmcia_dev_present(struct pcmcia_device *_p_dev) 1428 { 1429 struct pcmcia_device *p_dev; 1430 struct pcmcia_device *ret = NULL; 1431 1432 p_dev = pcmcia_get_dev(_p_dev); 1433 if (!p_dev) 1434 return NULL; 1435 1436 if (!p_dev->socket->pcmcia_state.present) 1437 goto out; 1438 1439 if (p_dev->_removed) 1440 goto out; 1441 1442 if (p_dev->suspended) 1443 goto out; 1444 1445 ret = p_dev; 1446 out: 1447 pcmcia_put_dev(p_dev); 1448 return ret; 1449 } 1450 EXPORT_SYMBOL(pcmcia_dev_present); 1451 1452 1453 static struct pcmcia_callback pcmcia_bus_callback = { 1454 .owner = THIS_MODULE, 1455 .event = ds_event, 1456 .requery = pcmcia_bus_rescan, 1457 .suspend = pcmcia_bus_suspend, 1458 .resume = pcmcia_bus_resume, 1459 }; 1460 1461 static int __devinit pcmcia_bus_add_socket(struct device *dev, 1462 struct class_interface *class_intf) 1463 { 1464 struct pcmcia_socket *socket = dev_get_drvdata(dev); 1465 int ret; 1466 1467 socket = pcmcia_get_socket(socket); 1468 if (!socket) { 1469 printk(KERN_ERR "PCMCIA obtaining reference to socket %p failed\n", socket); 1470 return -ENODEV; 1471 } 1472 1473 /* 1474 * Ugly. But we want to wait for the socket threads to have started up. 1475 * We really should let the drivers themselves drive some of this.. 1476 */ 1477 msleep(250); 1478 1479 #ifdef CONFIG_PCMCIA_IOCTL 1480 init_waitqueue_head(&socket->queue); 1481 #endif 1482 INIT_LIST_HEAD(&socket->devices_list); 1483 INIT_WORK(&socket->device_add, pcmcia_delayed_add_device); 1484 memset(&socket->pcmcia_state, 0, sizeof(u8)); 1485 socket->device_count = 0; 1486 1487 ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback); 1488 if (ret) { 1489 printk(KERN_ERR "PCMCIA registration PCCard core failed for socket %p\n", socket); 1490 pcmcia_put_socket(socket); 1491 return (ret); 1492 } 1493 1494 return 0; 1495 } 1496 1497 static void pcmcia_bus_remove_socket(struct device *dev, 1498 struct class_interface *class_intf) 1499 { 1500 struct pcmcia_socket *socket = dev_get_drvdata(dev); 1501 1502 if (!socket) 1503 return; 1504 1505 socket->pcmcia_state.dead = 1; 1506 pccard_register_pcmcia(socket, NULL); 1507 1508 /* unregister any unbound devices */ 1509 mutex_lock(&socket->skt_mutex); 1510 pcmcia_card_remove(socket, NULL); 1511 mutex_unlock(&socket->skt_mutex); 1512 1513 pcmcia_put_socket(socket); 1514 1515 return; 1516 } 1517 1518 1519 /* the pcmcia_bus_interface is used to handle pcmcia socket devices */ 1520 static struct class_interface pcmcia_bus_interface = { 1521 .class = &pcmcia_socket_class, 1522 .add_dev = &pcmcia_bus_add_socket, 1523 .remove_dev = &pcmcia_bus_remove_socket, 1524 }; 1525 1526 1527 struct bus_type pcmcia_bus_type = { 1528 .name = "pcmcia", 1529 .uevent = pcmcia_bus_uevent, 1530 .match = pcmcia_bus_match, 1531 .dev_attrs = pcmcia_dev_attrs, 1532 .probe = pcmcia_device_probe, 1533 .remove = pcmcia_device_remove, 1534 .suspend = pcmcia_dev_suspend, 1535 .resume = pcmcia_dev_resume, 1536 }; 1537 1538 1539 static int __init init_pcmcia_bus(void) 1540 { 1541 int ret; 1542 1543 spin_lock_init(&pcmcia_dev_list_lock); 1544 1545 ret = bus_register(&pcmcia_bus_type); 1546 if (ret < 0) { 1547 printk(KERN_WARNING "pcmcia: bus_register error: %d\n", ret); 1548 return ret; 1549 } 1550 ret = class_interface_register(&pcmcia_bus_interface); 1551 if (ret < 0) { 1552 printk(KERN_WARNING 1553 "pcmcia: class_interface_register error: %d\n", ret); 1554 bus_unregister(&pcmcia_bus_type); 1555 return ret; 1556 } 1557 1558 pcmcia_setup_ioctl(); 1559 1560 return 0; 1561 } 1562 fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that 1563 * pcmcia_socket_class is already registered */ 1564 1565 1566 static void __exit exit_pcmcia_bus(void) 1567 { 1568 pcmcia_cleanup_ioctl(); 1569 1570 class_interface_unregister(&pcmcia_bus_interface); 1571 1572 bus_unregister(&pcmcia_bus_type); 1573 } 1574 module_exit(exit_pcmcia_bus); 1575 1576 1577 MODULE_ALIAS("ds"); 1578