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 - 2005 Dominik Brodowski 14 */ 15 16 #include <linux/config.h> 17 #include <linux/kernel.h> 18 #include <linux/module.h> 19 #include <linux/init.h> 20 #include <linux/errno.h> 21 #include <linux/list.h> 22 #include <linux/delay.h> 23 #include <linux/workqueue.h> 24 #include <linux/crc32.h> 25 #include <linux/firmware.h> 26 27 #define IN_CARD_SERVICES 28 #include <pcmcia/cs_types.h> 29 #include <pcmcia/cs.h> 30 #include <pcmcia/cistpl.h> 31 #include <pcmcia/ds.h> 32 #include <pcmcia/ss.h> 33 34 #include "cs_internal.h" 35 #include "ds_internal.h" 36 37 /*====================================================================*/ 38 39 /* Module parameters */ 40 41 MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>"); 42 MODULE_DESCRIPTION("PCMCIA Driver Services"); 43 MODULE_LICENSE("GPL"); 44 45 #ifdef DEBUG 46 int ds_pc_debug; 47 48 module_param_named(pc_debug, ds_pc_debug, int, 0644); 49 50 #define ds_dbg(lvl, fmt, arg...) do { \ 51 if (ds_pc_debug > (lvl)) \ 52 printk(KERN_DEBUG "ds: " fmt , ## arg); \ 53 } while (0) 54 #else 55 #define ds_dbg(lvl, fmt, arg...) do { } while (0) 56 #endif 57 58 spinlock_t pcmcia_dev_list_lock; 59 60 /*====================================================================*/ 61 62 /* code which was in cs.c before */ 63 64 /* String tables for error messages */ 65 66 typedef struct lookup_t { 67 int key; 68 char *msg; 69 } lookup_t; 70 71 static const lookup_t error_table[] = { 72 { CS_SUCCESS, "Operation succeeded" }, 73 { CS_BAD_ADAPTER, "Bad adapter" }, 74 { CS_BAD_ATTRIBUTE, "Bad attribute", }, 75 { CS_BAD_BASE, "Bad base address" }, 76 { CS_BAD_EDC, "Bad EDC" }, 77 { CS_BAD_IRQ, "Bad IRQ" }, 78 { CS_BAD_OFFSET, "Bad offset" }, 79 { CS_BAD_PAGE, "Bad page number" }, 80 { CS_READ_FAILURE, "Read failure" }, 81 { CS_BAD_SIZE, "Bad size" }, 82 { CS_BAD_SOCKET, "Bad socket" }, 83 { CS_BAD_TYPE, "Bad type" }, 84 { CS_BAD_VCC, "Bad Vcc" }, 85 { CS_BAD_VPP, "Bad Vpp" }, 86 { CS_BAD_WINDOW, "Bad window" }, 87 { CS_WRITE_FAILURE, "Write failure" }, 88 { CS_NO_CARD, "No card present" }, 89 { CS_UNSUPPORTED_FUNCTION, "Usupported function" }, 90 { CS_UNSUPPORTED_MODE, "Unsupported mode" }, 91 { CS_BAD_SPEED, "Bad speed" }, 92 { CS_BUSY, "Resource busy" }, 93 { CS_GENERAL_FAILURE, "General failure" }, 94 { CS_WRITE_PROTECTED, "Write protected" }, 95 { CS_BAD_ARG_LENGTH, "Bad argument length" }, 96 { CS_BAD_ARGS, "Bad arguments" }, 97 { CS_CONFIGURATION_LOCKED, "Configuration locked" }, 98 { CS_IN_USE, "Resource in use" }, 99 { CS_NO_MORE_ITEMS, "No more items" }, 100 { CS_OUT_OF_RESOURCE, "Out of resource" }, 101 { CS_BAD_HANDLE, "Bad handle" }, 102 { CS_BAD_TUPLE, "Bad CIS tuple" } 103 }; 104 105 106 static const lookup_t service_table[] = { 107 { AccessConfigurationRegister, "AccessConfigurationRegister" }, 108 { AddSocketServices, "AddSocketServices" }, 109 { AdjustResourceInfo, "AdjustResourceInfo" }, 110 { CheckEraseQueue, "CheckEraseQueue" }, 111 { CloseMemory, "CloseMemory" }, 112 { DeregisterClient, "DeregisterClient" }, 113 { DeregisterEraseQueue, "DeregisterEraseQueue" }, 114 { GetCardServicesInfo, "GetCardServicesInfo" }, 115 { GetClientInfo, "GetClientInfo" }, 116 { GetConfigurationInfo, "GetConfigurationInfo" }, 117 { GetEventMask, "GetEventMask" }, 118 { GetFirstClient, "GetFirstClient" }, 119 { GetFirstRegion, "GetFirstRegion" }, 120 { GetFirstTuple, "GetFirstTuple" }, 121 { GetNextClient, "GetNextClient" }, 122 { GetNextRegion, "GetNextRegion" }, 123 { GetNextTuple, "GetNextTuple" }, 124 { GetStatus, "GetStatus" }, 125 { GetTupleData, "GetTupleData" }, 126 { MapMemPage, "MapMemPage" }, 127 { ModifyConfiguration, "ModifyConfiguration" }, 128 { ModifyWindow, "ModifyWindow" }, 129 { OpenMemory, "OpenMemory" }, 130 { ParseTuple, "ParseTuple" }, 131 { ReadMemory, "ReadMemory" }, 132 { RegisterClient, "RegisterClient" }, 133 { RegisterEraseQueue, "RegisterEraseQueue" }, 134 { RegisterMTD, "RegisterMTD" }, 135 { ReleaseConfiguration, "ReleaseConfiguration" }, 136 { ReleaseIO, "ReleaseIO" }, 137 { ReleaseIRQ, "ReleaseIRQ" }, 138 { ReleaseWindow, "ReleaseWindow" }, 139 { RequestConfiguration, "RequestConfiguration" }, 140 { RequestIO, "RequestIO" }, 141 { RequestIRQ, "RequestIRQ" }, 142 { RequestSocketMask, "RequestSocketMask" }, 143 { RequestWindow, "RequestWindow" }, 144 { ResetCard, "ResetCard" }, 145 { SetEventMask, "SetEventMask" }, 146 { ValidateCIS, "ValidateCIS" }, 147 { WriteMemory, "WriteMemory" }, 148 { BindDevice, "BindDevice" }, 149 { BindMTD, "BindMTD" }, 150 { ReportError, "ReportError" }, 151 { SuspendCard, "SuspendCard" }, 152 { ResumeCard, "ResumeCard" }, 153 { EjectCard, "EjectCard" }, 154 { InsertCard, "InsertCard" }, 155 { ReplaceCIS, "ReplaceCIS" } 156 }; 157 158 159 static int pcmcia_report_error(struct pcmcia_device *p_dev, error_info_t *err) 160 { 161 int i; 162 char *serv; 163 164 if (!p_dev) 165 printk(KERN_NOTICE); 166 else 167 printk(KERN_NOTICE "%s: ", p_dev->dev.bus_id); 168 169 for (i = 0; i < ARRAY_SIZE(service_table); i++) 170 if (service_table[i].key == err->func) 171 break; 172 if (i < ARRAY_SIZE(service_table)) 173 serv = service_table[i].msg; 174 else 175 serv = "Unknown service number"; 176 177 for (i = 0; i < ARRAY_SIZE(error_table); i++) 178 if (error_table[i].key == err->retcode) 179 break; 180 if (i < ARRAY_SIZE(error_table)) 181 printk("%s: %s\n", serv, error_table[i].msg); 182 else 183 printk("%s: Unknown error code %#x\n", serv, err->retcode); 184 185 return CS_SUCCESS; 186 } /* report_error */ 187 188 /* end of code which was in cs.c before */ 189 190 /*======================================================================*/ 191 192 void cs_error(struct pcmcia_device *p_dev, int func, int ret) 193 { 194 error_info_t err = { func, ret }; 195 pcmcia_report_error(p_dev, &err); 196 } 197 EXPORT_SYMBOL(cs_error); 198 199 200 static void pcmcia_check_driver(struct pcmcia_driver *p_drv) 201 { 202 struct pcmcia_device_id *did = p_drv->id_table; 203 unsigned int i; 204 u32 hash; 205 206 if (!p_drv->probe || !p_drv->remove) 207 printk(KERN_DEBUG "pcmcia: %s lacks a requisite callback " 208 "function\n", p_drv->drv.name); 209 210 while (did && did->match_flags) { 211 for (i=0; i<4; i++) { 212 if (!did->prod_id[i]) 213 continue; 214 215 hash = crc32(0, did->prod_id[i], strlen(did->prod_id[i])); 216 if (hash == did->prod_id_hash[i]) 217 continue; 218 219 printk(KERN_DEBUG "pcmcia: %s: invalid hash for " 220 "product string \"%s\": is 0x%x, should " 221 "be 0x%x\n", p_drv->drv.name, did->prod_id[i], 222 did->prod_id_hash[i], hash); 223 printk(KERN_DEBUG "pcmcia: see " 224 "Documentation/pcmcia/devicetable.txt for " 225 "details\n"); 226 } 227 did++; 228 } 229 230 return; 231 } 232 233 234 #ifdef CONFIG_PCMCIA_LOAD_CIS 235 236 /** 237 * pcmcia_load_firmware - load CIS from userspace if device-provided is broken 238 * @dev - the pcmcia device which needs a CIS override 239 * @filename - requested filename in /lib/firmware/cis/ 240 * 241 * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if 242 * the one provided by the card is broken. The firmware files reside in 243 * /lib/firmware/cis/ in userspace. 244 */ 245 static int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename) 246 { 247 struct pcmcia_socket *s = dev->socket; 248 const struct firmware *fw; 249 char path[20]; 250 int ret=-ENOMEM; 251 cisdump_t *cis; 252 253 if (!filename) 254 return -EINVAL; 255 256 ds_dbg(1, "trying to load firmware %s\n", filename); 257 258 if (strlen(filename) > 14) 259 return -EINVAL; 260 261 snprintf(path, 20, "%s", filename); 262 263 if (request_firmware(&fw, path, &dev->dev) == 0) { 264 if (fw->size >= CISTPL_MAX_CIS_SIZE) 265 goto release; 266 267 cis = kzalloc(sizeof(cisdump_t), GFP_KERNEL); 268 if (!cis) 269 goto release; 270 271 cis->Length = fw->size + 1; 272 memcpy(cis->Data, fw->data, fw->size); 273 274 if (!pcmcia_replace_cis(s, cis)) 275 ret = 0; 276 } 277 release: 278 release_firmware(fw); 279 280 return (ret); 281 } 282 283 #else /* !CONFIG_PCMCIA_LOAD_CIS */ 284 285 static inline int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename) 286 { 287 return -ENODEV; 288 } 289 290 #endif 291 292 293 /*======================================================================*/ 294 295 296 /** 297 * pcmcia_register_driver - register a PCMCIA driver with the bus core 298 * 299 * Registers a PCMCIA driver with the PCMCIA bus core. 300 */ 301 static int pcmcia_device_probe(struct device *dev); 302 static int pcmcia_device_remove(struct device * dev); 303 304 int pcmcia_register_driver(struct pcmcia_driver *driver) 305 { 306 if (!driver) 307 return -EINVAL; 308 309 pcmcia_check_driver(driver); 310 311 /* initialize common fields */ 312 driver->drv.bus = &pcmcia_bus_type; 313 driver->drv.owner = driver->owner; 314 driver->drv.probe = pcmcia_device_probe; 315 driver->drv.remove = pcmcia_device_remove; 316 317 return driver_register(&driver->drv); 318 } 319 EXPORT_SYMBOL(pcmcia_register_driver); 320 321 /** 322 * pcmcia_unregister_driver - unregister a PCMCIA driver with the bus core 323 */ 324 void pcmcia_unregister_driver(struct pcmcia_driver *driver) 325 { 326 driver_unregister(&driver->drv); 327 } 328 EXPORT_SYMBOL(pcmcia_unregister_driver); 329 330 331 /* pcmcia_device handling */ 332 333 struct pcmcia_device * pcmcia_get_dev(struct pcmcia_device *p_dev) 334 { 335 struct device *tmp_dev; 336 tmp_dev = get_device(&p_dev->dev); 337 if (!tmp_dev) 338 return NULL; 339 return to_pcmcia_dev(tmp_dev); 340 } 341 342 void pcmcia_put_dev(struct pcmcia_device *p_dev) 343 { 344 if (p_dev) 345 put_device(&p_dev->dev); 346 } 347 348 static void pcmcia_release_dev(struct device *dev) 349 { 350 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 351 ds_dbg(1, "releasing dev %p\n", p_dev); 352 pcmcia_put_socket(p_dev->socket); 353 kfree(p_dev->devname); 354 kfree(p_dev); 355 } 356 357 358 static int pcmcia_device_probe(struct device * dev) 359 { 360 struct pcmcia_device *p_dev; 361 struct pcmcia_driver *p_drv; 362 struct pcmcia_socket *s; 363 int ret = 0; 364 365 dev = get_device(dev); 366 if (!dev) 367 return -ENODEV; 368 369 p_dev = to_pcmcia_dev(dev); 370 p_drv = to_pcmcia_drv(dev->driver); 371 s = p_dev->socket; 372 373 if ((!p_drv->probe) || (!try_module_get(p_drv->owner))) { 374 ret = -EINVAL; 375 goto put_dev; 376 } 377 378 p_dev->state &= ~CLIENT_UNBOUND; 379 380 /* set up the device configuration, if it hasn't been done before */ 381 if (!s->functions) { 382 cistpl_longlink_mfc_t mfc; 383 if (pccard_read_tuple(s, p_dev->func, CISTPL_LONGLINK_MFC, 384 &mfc) == CS_SUCCESS) 385 s->functions = mfc.nfn; 386 else 387 s->functions = 1; 388 s->config = kzalloc(sizeof(config_t) * s->functions, 389 GFP_KERNEL); 390 if (!s->config) { 391 ret = -ENOMEM; 392 goto put_module; 393 } 394 } 395 396 ret = p_drv->probe(p_dev); 397 398 put_module: 399 if (ret) 400 module_put(p_drv->owner); 401 put_dev: 402 if (ret) 403 put_device(dev); 404 return (ret); 405 } 406 407 408 static int pcmcia_device_remove(struct device * dev) 409 { 410 struct pcmcia_device *p_dev; 411 struct pcmcia_driver *p_drv; 412 int i; 413 414 /* detach the "instance" */ 415 p_dev = to_pcmcia_dev(dev); 416 p_drv = to_pcmcia_drv(dev->driver); 417 if (!p_drv) 418 return 0; 419 420 if (p_drv->remove) 421 p_drv->remove(p_dev); 422 423 /* check for proper unloading */ 424 if (p_dev->state & (CLIENT_IRQ_REQ|CLIENT_IO_REQ|CLIENT_CONFIG_LOCKED)) 425 printk(KERN_INFO "pcmcia: driver %s did not release config properly\n", 426 p_drv->drv.name); 427 428 for (i = 0; i < MAX_WIN; i++) 429 if (p_dev->state & CLIENT_WIN_REQ(i)) 430 printk(KERN_INFO "pcmcia: driver %s did not release windows properly\n", 431 p_drv->drv.name); 432 433 /* references from pcmcia_probe_device */ 434 p_dev->state = CLIENT_UNBOUND; 435 pcmcia_put_dev(p_dev); 436 module_put(p_drv->owner); 437 438 return 0; 439 } 440 441 442 /* 443 * Removes a PCMCIA card from the device tree and socket list. 444 */ 445 static void pcmcia_card_remove(struct pcmcia_socket *s) 446 { 447 struct pcmcia_device *p_dev; 448 unsigned long flags; 449 450 ds_dbg(2, "unbind_request(%d)\n", s->sock); 451 452 s->device_count = 0; 453 454 for (;;) { 455 /* unregister all pcmcia_devices registered with this socket*/ 456 spin_lock_irqsave(&pcmcia_dev_list_lock, flags); 457 if (list_empty(&s->devices_list)) { 458 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags); 459 return; 460 } 461 p_dev = list_entry((&s->devices_list)->next, struct pcmcia_device, socket_device_list); 462 list_del(&p_dev->socket_device_list); 463 p_dev->state |= CLIENT_STALE; 464 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags); 465 466 device_unregister(&p_dev->dev); 467 } 468 469 return; 470 } /* unbind_request */ 471 472 473 /* 474 * pcmcia_device_query -- determine information about a pcmcia device 475 */ 476 static int pcmcia_device_query(struct pcmcia_device *p_dev) 477 { 478 cistpl_manfid_t manf_id; 479 cistpl_funcid_t func_id; 480 cistpl_vers_1_t *vers1; 481 unsigned int i; 482 483 vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL); 484 if (!vers1) 485 return -ENOMEM; 486 487 if (!pccard_read_tuple(p_dev->socket, p_dev->func, 488 CISTPL_MANFID, &manf_id)) { 489 p_dev->manf_id = manf_id.manf; 490 p_dev->card_id = manf_id.card; 491 p_dev->has_manf_id = 1; 492 p_dev->has_card_id = 1; 493 } 494 495 if (!pccard_read_tuple(p_dev->socket, p_dev->func, 496 CISTPL_FUNCID, &func_id)) { 497 p_dev->func_id = func_id.func; 498 p_dev->has_func_id = 1; 499 } else { 500 /* rule of thumb: cards with no FUNCID, but with 501 * common memory device geometry information, are 502 * probably memory cards (from pcmcia-cs) */ 503 cistpl_device_geo_t *devgeo; 504 505 devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL); 506 if (!devgeo) { 507 kfree(vers1); 508 return -ENOMEM; 509 } 510 if (!pccard_read_tuple(p_dev->socket, p_dev->func, 511 CISTPL_DEVICE_GEO, devgeo)) { 512 ds_dbg(0, "mem device geometry probably means " 513 "FUNCID_MEMORY\n"); 514 p_dev->func_id = CISTPL_FUNCID_MEMORY; 515 p_dev->has_func_id = 1; 516 } 517 kfree(devgeo); 518 } 519 520 if (!pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_VERS_1, 521 vers1)) { 522 for (i=0; i < vers1->ns; i++) { 523 char *tmp; 524 unsigned int length; 525 526 tmp = vers1->str + vers1->ofs[i]; 527 528 length = strlen(tmp) + 1; 529 if ((length < 3) || (length > 255)) 530 continue; 531 532 p_dev->prod_id[i] = kmalloc(sizeof(char) * length, 533 GFP_KERNEL); 534 if (!p_dev->prod_id[i]) 535 continue; 536 537 p_dev->prod_id[i] = strncpy(p_dev->prod_id[i], 538 tmp, length); 539 } 540 } 541 542 kfree(vers1); 543 return 0; 544 } 545 546 547 /* device_add_lock is needed to avoid double registration by cardmgr and kernel. 548 * Serializes pcmcia_device_add; will most likely be removed in future. 549 * 550 * While it has the caveat that adding new PCMCIA devices inside(!) device_register() 551 * won't work, this doesn't matter much at the moment: the driver core doesn't 552 * support it either. 553 */ 554 static DECLARE_MUTEX(device_add_lock); 555 556 struct pcmcia_device * pcmcia_device_add(struct pcmcia_socket *s, unsigned int function) 557 { 558 struct pcmcia_device *p_dev; 559 unsigned long flags; 560 int bus_id_len; 561 562 s = pcmcia_get_socket(s); 563 if (!s) 564 return NULL; 565 566 down(&device_add_lock); 567 568 /* max of 2 devices per card */ 569 if (s->device_count == 2) 570 goto err_put; 571 572 p_dev = kzalloc(sizeof(struct pcmcia_device), GFP_KERNEL); 573 if (!p_dev) 574 goto err_put; 575 576 p_dev->socket = s; 577 p_dev->device_no = (s->device_count++); 578 p_dev->func = function; 579 580 p_dev->dev.bus = &pcmcia_bus_type; 581 p_dev->dev.parent = s->dev.dev; 582 p_dev->dev.release = pcmcia_release_dev; 583 bus_id_len = sprintf (p_dev->dev.bus_id, "%d.%d", p_dev->socket->sock, p_dev->device_no); 584 585 p_dev->devname = kmalloc(6 + bus_id_len + 1, GFP_KERNEL); 586 if (!p_dev->devname) 587 goto err_free; 588 sprintf (p_dev->devname, "pcmcia%s", p_dev->dev.bus_id); 589 590 /* compat */ 591 p_dev->state = CLIENT_UNBOUND; 592 593 /* Add to the list in pcmcia_bus_socket */ 594 spin_lock_irqsave(&pcmcia_dev_list_lock, flags); 595 list_add_tail(&p_dev->socket_device_list, &s->devices_list); 596 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags); 597 598 printk(KERN_NOTICE "pcmcia: registering new device %s\n", 599 p_dev->devname); 600 601 pcmcia_device_query(p_dev); 602 603 if (device_register(&p_dev->dev)) { 604 spin_lock_irqsave(&pcmcia_dev_list_lock, flags); 605 list_del(&p_dev->socket_device_list); 606 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags); 607 608 goto err_free; 609 } 610 611 up(&device_add_lock); 612 613 return p_dev; 614 615 err_free: 616 kfree(p_dev->devname); 617 kfree(p_dev); 618 s->device_count--; 619 err_put: 620 up(&device_add_lock); 621 pcmcia_put_socket(s); 622 623 return NULL; 624 } 625 626 627 static int pcmcia_card_add(struct pcmcia_socket *s) 628 { 629 cisinfo_t cisinfo; 630 cistpl_longlink_mfc_t mfc; 631 unsigned int no_funcs, i; 632 int ret = 0; 633 634 if (!(s->resource_setup_done)) 635 return -EAGAIN; /* try again, but later... */ 636 637 if (pcmcia_validate_mem(s)) 638 return -EAGAIN; /* try again, but later... */ 639 640 ret = pccard_validate_cis(s, BIND_FN_ALL, &cisinfo); 641 if (ret || !cisinfo.Chains) { 642 ds_dbg(0, "invalid CIS or invalid resources\n"); 643 return -ENODEV; 644 } 645 646 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc)) 647 no_funcs = mfc.nfn; 648 else 649 no_funcs = 1; 650 651 for (i=0; i < no_funcs; i++) 652 pcmcia_device_add(s, i); 653 654 return (ret); 655 } 656 657 658 static void pcmcia_delayed_add_pseudo_device(void *data) 659 { 660 struct pcmcia_socket *s = data; 661 pcmcia_device_add(s, 0); 662 s->pcmcia_state.device_add_pending = 0; 663 } 664 665 static inline void pcmcia_add_pseudo_device(struct pcmcia_socket *s) 666 { 667 if (!s->pcmcia_state.device_add_pending) { 668 s->pcmcia_state.device_add_pending = 1; 669 schedule_work(&s->device_add); 670 } 671 return; 672 } 673 674 static int pcmcia_requery(struct device *dev, void * _data) 675 { 676 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 677 if (!p_dev->dev.driver) 678 pcmcia_device_query(p_dev); 679 680 return 0; 681 } 682 683 static void pcmcia_bus_rescan(struct pcmcia_socket *skt) 684 { 685 int no_devices=0; 686 unsigned long flags; 687 688 /* must be called with skt_sem held */ 689 spin_lock_irqsave(&pcmcia_dev_list_lock, flags); 690 if (list_empty(&skt->devices_list)) 691 no_devices=1; 692 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags); 693 694 /* if no devices were added for this socket yet because of 695 * missing resource information or other trouble, we need to 696 * do this now. */ 697 if (no_devices) { 698 int ret = pcmcia_card_add(skt); 699 if (ret) 700 return; 701 } 702 703 /* some device information might have changed because of a CIS 704 * update or because we can finally read it correctly... so 705 * determine it again, overwriting old values if necessary. */ 706 bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery); 707 708 /* we re-scan all devices, not just the ones connected to this 709 * socket. This does not matter, though. */ 710 bus_rescan_devices(&pcmcia_bus_type); 711 } 712 713 static inline int pcmcia_devmatch(struct pcmcia_device *dev, 714 struct pcmcia_device_id *did) 715 { 716 if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) { 717 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id)) 718 return 0; 719 } 720 721 if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) { 722 if ((!dev->has_card_id) || (dev->card_id != did->card_id)) 723 return 0; 724 } 725 726 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) { 727 if (dev->func != did->function) 728 return 0; 729 } 730 731 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) { 732 if (!dev->prod_id[0]) 733 return 0; 734 if (strcmp(did->prod_id[0], dev->prod_id[0])) 735 return 0; 736 } 737 738 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) { 739 if (!dev->prod_id[1]) 740 return 0; 741 if (strcmp(did->prod_id[1], dev->prod_id[1])) 742 return 0; 743 } 744 745 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) { 746 if (!dev->prod_id[2]) 747 return 0; 748 if (strcmp(did->prod_id[2], dev->prod_id[2])) 749 return 0; 750 } 751 752 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) { 753 if (!dev->prod_id[3]) 754 return 0; 755 if (strcmp(did->prod_id[3], dev->prod_id[3])) 756 return 0; 757 } 758 759 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) { 760 /* handle pseudo multifunction devices: 761 * there are at most two pseudo multifunction devices. 762 * if we're matching against the first, schedule a 763 * call which will then check whether there are two 764 * pseudo devices, and if not, add the second one. 765 */ 766 if (dev->device_no == 0) 767 pcmcia_add_pseudo_device(dev->socket); 768 769 if (dev->device_no != did->device_no) 770 return 0; 771 } 772 773 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) { 774 if ((!dev->has_func_id) || (dev->func_id != did->func_id)) 775 return 0; 776 777 /* if this is a pseudo-multi-function device, 778 * we need explicit matches */ 779 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) 780 return 0; 781 if (dev->device_no) 782 return 0; 783 784 /* also, FUNC_ID matching needs to be activated by userspace 785 * after it has re-checked that there is no possible module 786 * with a prod_id/manf_id/card_id match. 787 */ 788 if (!dev->allow_func_id_match) 789 return 0; 790 } 791 792 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) { 793 if (!dev->socket->fake_cis) 794 pcmcia_load_firmware(dev, did->cisfile); 795 796 if (!dev->socket->fake_cis) 797 return 0; 798 } 799 800 if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) { 801 int i; 802 for (i=0; i<4; i++) 803 if (dev->prod_id[i]) 804 return 0; 805 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id) 806 return 0; 807 } 808 809 dev->dev.driver_data = (void *) did; 810 811 return 1; 812 } 813 814 815 static int pcmcia_bus_match(struct device * dev, struct device_driver * drv) { 816 struct pcmcia_device * p_dev = to_pcmcia_dev(dev); 817 struct pcmcia_driver * p_drv = to_pcmcia_drv(drv); 818 struct pcmcia_device_id *did = p_drv->id_table; 819 820 /* matching by cardmgr */ 821 if (p_dev->cardmgr == p_drv) 822 return 1; 823 824 while (did && did->match_flags) { 825 if (pcmcia_devmatch(p_dev, did)) 826 return 1; 827 did++; 828 } 829 830 return 0; 831 } 832 833 #ifdef CONFIG_HOTPLUG 834 835 static int pcmcia_bus_uevent(struct device *dev, char **envp, int num_envp, 836 char *buffer, int buffer_size) 837 { 838 struct pcmcia_device *p_dev; 839 int i, length = 0; 840 u32 hash[4] = { 0, 0, 0, 0}; 841 842 if (!dev) 843 return -ENODEV; 844 845 p_dev = to_pcmcia_dev(dev); 846 847 /* calculate hashes */ 848 for (i=0; i<4; i++) { 849 if (!p_dev->prod_id[i]) 850 continue; 851 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i])); 852 } 853 854 i = 0; 855 856 if (add_uevent_var(envp, num_envp, &i, 857 buffer, buffer_size, &length, 858 "SOCKET_NO=%u", 859 p_dev->socket->sock)) 860 return -ENOMEM; 861 862 if (add_uevent_var(envp, num_envp, &i, 863 buffer, buffer_size, &length, 864 "DEVICE_NO=%02X", 865 p_dev->device_no)) 866 return -ENOMEM; 867 868 if (add_uevent_var(envp, num_envp, &i, 869 buffer, buffer_size, &length, 870 "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X" 871 "pa%08Xpb%08Xpc%08Xpd%08X", 872 p_dev->has_manf_id ? p_dev->manf_id : 0, 873 p_dev->has_card_id ? p_dev->card_id : 0, 874 p_dev->has_func_id ? p_dev->func_id : 0, 875 p_dev->func, 876 p_dev->device_no, 877 hash[0], 878 hash[1], 879 hash[2], 880 hash[3])) 881 return -ENOMEM; 882 883 envp[i] = NULL; 884 885 return 0; 886 } 887 888 #else 889 890 static int pcmcia_bus_uevent(struct device *dev, char **envp, int num_envp, 891 char *buffer, int buffer_size) 892 { 893 return -ENODEV; 894 } 895 896 #endif 897 898 /************************ per-device sysfs output ***************************/ 899 900 #define pcmcia_device_attr(field, test, format) \ 901 static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf) \ 902 { \ 903 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \ 904 return p_dev->test ? sprintf (buf, format, p_dev->field) : -ENODEV; \ 905 } 906 907 #define pcmcia_device_stringattr(name, field) \ 908 static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf) \ 909 { \ 910 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \ 911 return p_dev->field ? sprintf (buf, "%s\n", p_dev->field) : -ENODEV; \ 912 } 913 914 pcmcia_device_attr(func, socket, "0x%02x\n"); 915 pcmcia_device_attr(func_id, has_func_id, "0x%02x\n"); 916 pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n"); 917 pcmcia_device_attr(card_id, has_card_id, "0x%04x\n"); 918 pcmcia_device_stringattr(prod_id1, prod_id[0]); 919 pcmcia_device_stringattr(prod_id2, prod_id[1]); 920 pcmcia_device_stringattr(prod_id3, prod_id[2]); 921 pcmcia_device_stringattr(prod_id4, prod_id[3]); 922 923 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf) 924 { 925 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 926 int i; 927 u32 hash[4] = { 0, 0, 0, 0}; 928 929 /* calculate hashes */ 930 for (i=0; i<4; i++) { 931 if (!p_dev->prod_id[i]) 932 continue; 933 hash[i] = crc32(0,p_dev->prod_id[i],strlen(p_dev->prod_id[i])); 934 } 935 return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X" 936 "pa%08Xpb%08Xpc%08Xpd%08X\n", 937 p_dev->has_manf_id ? p_dev->manf_id : 0, 938 p_dev->has_card_id ? p_dev->card_id : 0, 939 p_dev->has_func_id ? p_dev->func_id : 0, 940 p_dev->func, p_dev->device_no, 941 hash[0], hash[1], hash[2], hash[3]); 942 } 943 944 static ssize_t pcmcia_store_allow_func_id_match(struct device *dev, 945 struct device_attribute *attr, const char *buf, size_t count) 946 { 947 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 948 if (!count) 949 return -EINVAL; 950 951 down(&p_dev->socket->skt_sem); 952 p_dev->allow_func_id_match = 1; 953 up(&p_dev->socket->skt_sem); 954 955 bus_rescan_devices(&pcmcia_bus_type); 956 957 return count; 958 } 959 960 static struct device_attribute pcmcia_dev_attrs[] = { 961 __ATTR(function, 0444, func_show, NULL), 962 __ATTR_RO(func_id), 963 __ATTR_RO(manf_id), 964 __ATTR_RO(card_id), 965 __ATTR_RO(prod_id1), 966 __ATTR_RO(prod_id2), 967 __ATTR_RO(prod_id3), 968 __ATTR_RO(prod_id4), 969 __ATTR_RO(modalias), 970 __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match), 971 __ATTR_NULL, 972 }; 973 974 /* PM support, also needed for reset */ 975 976 static int pcmcia_dev_suspend(struct device * dev, pm_message_t state) 977 { 978 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 979 struct pcmcia_driver *p_drv = NULL; 980 981 if (dev->driver) 982 p_drv = to_pcmcia_drv(dev->driver); 983 984 if (p_drv && p_drv->suspend) 985 return p_drv->suspend(p_dev); 986 987 return 0; 988 } 989 990 991 static int pcmcia_dev_resume(struct device * dev) 992 { 993 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 994 struct pcmcia_driver *p_drv = NULL; 995 996 if (dev->driver) 997 p_drv = to_pcmcia_drv(dev->driver); 998 999 if (p_drv && p_drv->resume) 1000 return p_drv->resume(p_dev); 1001 1002 return 0; 1003 } 1004 1005 1006 static int pcmcia_bus_suspend_callback(struct device *dev, void * _data) 1007 { 1008 struct pcmcia_socket *skt = _data; 1009 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1010 1011 if (p_dev->socket != skt) 1012 return 0; 1013 1014 return dpm_runtime_suspend(dev, PMSG_SUSPEND); 1015 } 1016 1017 static int pcmcia_bus_resume_callback(struct device *dev, void * _data) 1018 { 1019 struct pcmcia_socket *skt = _data; 1020 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1021 1022 if (p_dev->socket != skt) 1023 return 0; 1024 1025 dpm_runtime_resume(dev); 1026 1027 return 0; 1028 } 1029 1030 static int pcmcia_bus_resume(struct pcmcia_socket *skt) 1031 { 1032 bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback); 1033 return 0; 1034 } 1035 1036 static int pcmcia_bus_suspend(struct pcmcia_socket *skt) 1037 { 1038 if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt, 1039 pcmcia_bus_suspend_callback)) { 1040 pcmcia_bus_resume(skt); 1041 return -EIO; 1042 } 1043 return 0; 1044 } 1045 1046 1047 /*====================================================================== 1048 1049 The card status event handler. 1050 1051 ======================================================================*/ 1052 1053 /* Normally, the event is passed to individual drivers after 1054 * informing userspace. Only for CS_EVENT_CARD_REMOVAL this 1055 * is inversed to maintain historic compatibility. 1056 */ 1057 1058 static int ds_event(struct pcmcia_socket *skt, event_t event, int priority) 1059 { 1060 struct pcmcia_socket *s = pcmcia_get_socket(skt); 1061 1062 ds_dbg(1, "ds_event(0x%06x, %d, 0x%p)\n", 1063 event, priority, skt); 1064 1065 switch (event) { 1066 case CS_EVENT_CARD_REMOVAL: 1067 s->pcmcia_state.present = 0; 1068 pcmcia_card_remove(skt); 1069 handle_event(skt, event); 1070 break; 1071 1072 case CS_EVENT_CARD_INSERTION: 1073 s->pcmcia_state.present = 1; 1074 pcmcia_card_add(skt); 1075 handle_event(skt, event); 1076 break; 1077 1078 case CS_EVENT_EJECTION_REQUEST: 1079 break; 1080 1081 case CS_EVENT_PM_SUSPEND: 1082 case CS_EVENT_PM_RESUME: 1083 case CS_EVENT_RESET_PHYSICAL: 1084 case CS_EVENT_CARD_RESET: 1085 default: 1086 handle_event(skt, event); 1087 break; 1088 } 1089 1090 pcmcia_put_socket(s); 1091 1092 return 0; 1093 } /* ds_event */ 1094 1095 1096 static struct pcmcia_callback pcmcia_bus_callback = { 1097 .owner = THIS_MODULE, 1098 .event = ds_event, 1099 .requery = pcmcia_bus_rescan, 1100 .suspend = pcmcia_bus_suspend, 1101 .resume = pcmcia_bus_resume, 1102 }; 1103 1104 static int __devinit pcmcia_bus_add_socket(struct class_device *class_dev, 1105 struct class_interface *class_intf) 1106 { 1107 struct pcmcia_socket *socket = class_get_devdata(class_dev); 1108 int ret; 1109 1110 socket = pcmcia_get_socket(socket); 1111 if (!socket) { 1112 printk(KERN_ERR "PCMCIA obtaining reference to socket %p failed\n", socket); 1113 return -ENODEV; 1114 } 1115 1116 /* 1117 * Ugly. But we want to wait for the socket threads to have started up. 1118 * We really should let the drivers themselves drive some of this.. 1119 */ 1120 msleep(250); 1121 1122 #ifdef CONFIG_PCMCIA_IOCTL 1123 init_waitqueue_head(&socket->queue); 1124 #endif 1125 INIT_LIST_HEAD(&socket->devices_list); 1126 INIT_WORK(&socket->device_add, pcmcia_delayed_add_pseudo_device, socket); 1127 memset(&socket->pcmcia_state, 0, sizeof(u8)); 1128 socket->device_count = 0; 1129 1130 ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback); 1131 if (ret) { 1132 printk(KERN_ERR "PCMCIA registration PCCard core failed for socket %p\n", socket); 1133 pcmcia_put_socket(socket); 1134 return (ret); 1135 } 1136 1137 return 0; 1138 } 1139 1140 static void pcmcia_bus_remove_socket(struct class_device *class_dev, 1141 struct class_interface *class_intf) 1142 { 1143 struct pcmcia_socket *socket = class_get_devdata(class_dev); 1144 1145 if (!socket) 1146 return; 1147 1148 socket->pcmcia_state.dead = 1; 1149 pccard_register_pcmcia(socket, NULL); 1150 1151 pcmcia_put_socket(socket); 1152 1153 return; 1154 } 1155 1156 1157 /* the pcmcia_bus_interface is used to handle pcmcia socket devices */ 1158 static struct class_interface pcmcia_bus_interface = { 1159 .class = &pcmcia_socket_class, 1160 .add = &pcmcia_bus_add_socket, 1161 .remove = &pcmcia_bus_remove_socket, 1162 }; 1163 1164 1165 struct bus_type pcmcia_bus_type = { 1166 .name = "pcmcia", 1167 .uevent = pcmcia_bus_uevent, 1168 .match = pcmcia_bus_match, 1169 .dev_attrs = pcmcia_dev_attrs, 1170 .suspend = pcmcia_dev_suspend, 1171 .resume = pcmcia_dev_resume, 1172 }; 1173 1174 1175 static int __init init_pcmcia_bus(void) 1176 { 1177 spin_lock_init(&pcmcia_dev_list_lock); 1178 1179 bus_register(&pcmcia_bus_type); 1180 class_interface_register(&pcmcia_bus_interface); 1181 1182 pcmcia_setup_ioctl(); 1183 1184 return 0; 1185 } 1186 fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that 1187 * pcmcia_socket_class is already registered */ 1188 1189 1190 static void __exit exit_pcmcia_bus(void) 1191 { 1192 pcmcia_cleanup_ioctl(); 1193 1194 class_interface_unregister(&pcmcia_bus_interface); 1195 1196 bus_unregister(&pcmcia_bus_type); 1197 } 1198 module_exit(exit_pcmcia_bus); 1199 1200 1201 MODULE_ALIAS("ds"); 1202