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; 314 315 return driver_register(&driver->drv); 316 } 317 EXPORT_SYMBOL(pcmcia_register_driver); 318 319 /** 320 * pcmcia_unregister_driver - unregister a PCMCIA driver with the bus core 321 */ 322 void pcmcia_unregister_driver(struct pcmcia_driver *driver) 323 { 324 driver_unregister(&driver->drv); 325 } 326 EXPORT_SYMBOL(pcmcia_unregister_driver); 327 328 329 /* pcmcia_device handling */ 330 331 struct pcmcia_device * pcmcia_get_dev(struct pcmcia_device *p_dev) 332 { 333 struct device *tmp_dev; 334 tmp_dev = get_device(&p_dev->dev); 335 if (!tmp_dev) 336 return NULL; 337 return to_pcmcia_dev(tmp_dev); 338 } 339 340 void pcmcia_put_dev(struct pcmcia_device *p_dev) 341 { 342 if (p_dev) 343 put_device(&p_dev->dev); 344 } 345 346 static void pcmcia_release_dev(struct device *dev) 347 { 348 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 349 ds_dbg(1, "releasing dev %p\n", p_dev); 350 pcmcia_put_socket(p_dev->socket); 351 kfree(p_dev->devname); 352 kfree(p_dev); 353 } 354 355 static void pcmcia_add_pseudo_device(struct pcmcia_socket *s) 356 { 357 if (!s->pcmcia_state.device_add_pending) { 358 s->pcmcia_state.device_add_pending = 1; 359 schedule_work(&s->device_add); 360 } 361 return; 362 } 363 364 static int pcmcia_device_probe(struct device * dev) 365 { 366 struct pcmcia_device *p_dev; 367 struct pcmcia_driver *p_drv; 368 struct pcmcia_device_id *did; 369 struct pcmcia_socket *s; 370 int ret = 0; 371 372 dev = get_device(dev); 373 if (!dev) 374 return -ENODEV; 375 376 p_dev = to_pcmcia_dev(dev); 377 p_drv = to_pcmcia_drv(dev->driver); 378 s = p_dev->socket; 379 380 if ((!p_drv->probe) || (!try_module_get(p_drv->owner))) { 381 ret = -EINVAL; 382 goto put_dev; 383 } 384 385 p_dev->state &= ~CLIENT_UNBOUND; 386 387 /* set up the device configuration, if it hasn't been done before */ 388 if (!s->functions) { 389 cistpl_longlink_mfc_t mfc; 390 if (pccard_read_tuple(s, p_dev->func, CISTPL_LONGLINK_MFC, 391 &mfc) == CS_SUCCESS) 392 s->functions = mfc.nfn; 393 else 394 s->functions = 1; 395 s->config = kzalloc(sizeof(config_t) * s->functions, 396 GFP_KERNEL); 397 if (!s->config) { 398 ret = -ENOMEM; 399 goto put_module; 400 } 401 } 402 403 ret = p_drv->probe(p_dev); 404 if (ret) 405 goto put_module; 406 407 /* handle pseudo multifunction devices: 408 * there are at most two pseudo multifunction devices. 409 * if we're matching against the first, schedule a 410 * call which will then check whether there are two 411 * pseudo devices, and if not, add the second one. 412 */ 413 did = (struct pcmcia_device_id *) p_dev->dev.driver_data; 414 if (did && (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) && 415 (p_dev->socket->device_count == 1) && (p_dev->device_no == 0)) 416 pcmcia_add_pseudo_device(p_dev->socket); 417 418 put_module: 419 if (ret) 420 module_put(p_drv->owner); 421 put_dev: 422 if (ret) 423 put_device(dev); 424 return (ret); 425 } 426 427 428 static int pcmcia_device_remove(struct device * dev) 429 { 430 struct pcmcia_device *p_dev; 431 struct pcmcia_driver *p_drv; 432 int i; 433 434 /* detach the "instance" */ 435 p_dev = to_pcmcia_dev(dev); 436 p_drv = to_pcmcia_drv(dev->driver); 437 if (!p_drv) 438 return 0; 439 440 if (p_drv->remove) 441 p_drv->remove(p_dev); 442 443 /* check for proper unloading */ 444 if (p_dev->state & (CLIENT_IRQ_REQ|CLIENT_IO_REQ|CLIENT_CONFIG_LOCKED)) 445 printk(KERN_INFO "pcmcia: driver %s did not release config properly\n", 446 p_drv->drv.name); 447 448 for (i = 0; i < MAX_WIN; i++) 449 if (p_dev->state & CLIENT_WIN_REQ(i)) 450 printk(KERN_INFO "pcmcia: driver %s did not release windows properly\n", 451 p_drv->drv.name); 452 453 /* references from pcmcia_probe_device */ 454 p_dev->state = CLIENT_UNBOUND; 455 pcmcia_put_dev(p_dev); 456 module_put(p_drv->owner); 457 458 return 0; 459 } 460 461 462 /* 463 * Removes a PCMCIA card from the device tree and socket list. 464 */ 465 static void pcmcia_card_remove(struct pcmcia_socket *s) 466 { 467 struct pcmcia_device *p_dev; 468 unsigned long flags; 469 470 ds_dbg(2, "unbind_request(%d)\n", s->sock); 471 472 s->device_count = 0; 473 474 for (;;) { 475 /* unregister all pcmcia_devices registered with this socket*/ 476 spin_lock_irqsave(&pcmcia_dev_list_lock, flags); 477 if (list_empty(&s->devices_list)) { 478 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags); 479 return; 480 } 481 p_dev = list_entry((&s->devices_list)->next, struct pcmcia_device, socket_device_list); 482 list_del(&p_dev->socket_device_list); 483 p_dev->state |= CLIENT_STALE; 484 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags); 485 486 device_unregister(&p_dev->dev); 487 } 488 489 return; 490 } /* unbind_request */ 491 492 493 /* 494 * pcmcia_device_query -- determine information about a pcmcia device 495 */ 496 static int pcmcia_device_query(struct pcmcia_device *p_dev) 497 { 498 cistpl_manfid_t manf_id; 499 cistpl_funcid_t func_id; 500 cistpl_vers_1_t *vers1; 501 unsigned int i; 502 503 vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL); 504 if (!vers1) 505 return -ENOMEM; 506 507 if (!pccard_read_tuple(p_dev->socket, p_dev->func, 508 CISTPL_MANFID, &manf_id)) { 509 p_dev->manf_id = manf_id.manf; 510 p_dev->card_id = manf_id.card; 511 p_dev->has_manf_id = 1; 512 p_dev->has_card_id = 1; 513 } 514 515 if (!pccard_read_tuple(p_dev->socket, p_dev->func, 516 CISTPL_FUNCID, &func_id)) { 517 p_dev->func_id = func_id.func; 518 p_dev->has_func_id = 1; 519 } else { 520 /* rule of thumb: cards with no FUNCID, but with 521 * common memory device geometry information, are 522 * probably memory cards (from pcmcia-cs) */ 523 cistpl_device_geo_t *devgeo; 524 525 devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL); 526 if (!devgeo) { 527 kfree(vers1); 528 return -ENOMEM; 529 } 530 if (!pccard_read_tuple(p_dev->socket, p_dev->func, 531 CISTPL_DEVICE_GEO, devgeo)) { 532 ds_dbg(0, "mem device geometry probably means " 533 "FUNCID_MEMORY\n"); 534 p_dev->func_id = CISTPL_FUNCID_MEMORY; 535 p_dev->has_func_id = 1; 536 } 537 kfree(devgeo); 538 } 539 540 if (!pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_VERS_1, 541 vers1)) { 542 for (i=0; i < vers1->ns; i++) { 543 char *tmp; 544 unsigned int length; 545 546 tmp = vers1->str + vers1->ofs[i]; 547 548 length = strlen(tmp) + 1; 549 if ((length < 3) || (length > 255)) 550 continue; 551 552 p_dev->prod_id[i] = kmalloc(sizeof(char) * length, 553 GFP_KERNEL); 554 if (!p_dev->prod_id[i]) 555 continue; 556 557 p_dev->prod_id[i] = strncpy(p_dev->prod_id[i], 558 tmp, length); 559 } 560 } 561 562 kfree(vers1); 563 return 0; 564 } 565 566 567 /* device_add_lock is needed to avoid double registration by cardmgr and kernel. 568 * Serializes pcmcia_device_add; will most likely be removed in future. 569 * 570 * While it has the caveat that adding new PCMCIA devices inside(!) device_register() 571 * won't work, this doesn't matter much at the moment: the driver core doesn't 572 * support it either. 573 */ 574 static DECLARE_MUTEX(device_add_lock); 575 576 struct pcmcia_device * pcmcia_device_add(struct pcmcia_socket *s, unsigned int function) 577 { 578 struct pcmcia_device *p_dev; 579 unsigned long flags; 580 int bus_id_len; 581 582 s = pcmcia_get_socket(s); 583 if (!s) 584 return NULL; 585 586 down(&device_add_lock); 587 588 /* max of 2 devices per card */ 589 if (s->device_count == 2) 590 goto err_put; 591 592 p_dev = kzalloc(sizeof(struct pcmcia_device), GFP_KERNEL); 593 if (!p_dev) 594 goto err_put; 595 596 p_dev->socket = s; 597 p_dev->device_no = (s->device_count++); 598 p_dev->func = function; 599 600 p_dev->dev.bus = &pcmcia_bus_type; 601 p_dev->dev.parent = s->dev.dev; 602 p_dev->dev.release = pcmcia_release_dev; 603 bus_id_len = sprintf (p_dev->dev.bus_id, "%d.%d", p_dev->socket->sock, p_dev->device_no); 604 605 p_dev->devname = kmalloc(6 + bus_id_len + 1, GFP_KERNEL); 606 if (!p_dev->devname) 607 goto err_free; 608 sprintf (p_dev->devname, "pcmcia%s", p_dev->dev.bus_id); 609 610 /* compat */ 611 p_dev->state = CLIENT_UNBOUND; 612 613 /* Add to the list in pcmcia_bus_socket */ 614 spin_lock_irqsave(&pcmcia_dev_list_lock, flags); 615 list_add_tail(&p_dev->socket_device_list, &s->devices_list); 616 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags); 617 618 printk(KERN_NOTICE "pcmcia: registering new device %s\n", 619 p_dev->devname); 620 621 pcmcia_device_query(p_dev); 622 623 if (device_register(&p_dev->dev)) { 624 spin_lock_irqsave(&pcmcia_dev_list_lock, flags); 625 list_del(&p_dev->socket_device_list); 626 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags); 627 628 goto err_free; 629 } 630 631 up(&device_add_lock); 632 633 return p_dev; 634 635 err_free: 636 kfree(p_dev->devname); 637 kfree(p_dev); 638 s->device_count--; 639 err_put: 640 up(&device_add_lock); 641 pcmcia_put_socket(s); 642 643 return NULL; 644 } 645 646 647 static int pcmcia_card_add(struct pcmcia_socket *s) 648 { 649 cisinfo_t cisinfo; 650 cistpl_longlink_mfc_t mfc; 651 unsigned int no_funcs, i; 652 int ret = 0; 653 654 if (!(s->resource_setup_done)) 655 return -EAGAIN; /* try again, but later... */ 656 657 if (pcmcia_validate_mem(s)) 658 return -EAGAIN; /* try again, but later... */ 659 660 ret = pccard_validate_cis(s, BIND_FN_ALL, &cisinfo); 661 if (ret || !cisinfo.Chains) { 662 ds_dbg(0, "invalid CIS or invalid resources\n"); 663 return -ENODEV; 664 } 665 666 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc)) 667 no_funcs = mfc.nfn; 668 else 669 no_funcs = 1; 670 671 for (i=0; i < no_funcs; i++) 672 pcmcia_device_add(s, i); 673 674 return (ret); 675 } 676 677 678 static void pcmcia_delayed_add_pseudo_device(void *data) 679 { 680 struct pcmcia_socket *s = data; 681 pcmcia_device_add(s, 0); 682 s->pcmcia_state.device_add_pending = 0; 683 } 684 685 static int pcmcia_requery(struct device *dev, void * _data) 686 { 687 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 688 if (!p_dev->dev.driver) 689 pcmcia_device_query(p_dev); 690 691 return 0; 692 } 693 694 static void pcmcia_bus_rescan(struct pcmcia_socket *skt) 695 { 696 int no_devices=0; 697 unsigned long flags; 698 699 /* must be called with skt_sem held */ 700 spin_lock_irqsave(&pcmcia_dev_list_lock, flags); 701 if (list_empty(&skt->devices_list)) 702 no_devices=1; 703 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags); 704 705 /* if no devices were added for this socket yet because of 706 * missing resource information or other trouble, we need to 707 * do this now. */ 708 if (no_devices) { 709 int ret = pcmcia_card_add(skt); 710 if (ret) 711 return; 712 } 713 714 /* some device information might have changed because of a CIS 715 * update or because we can finally read it correctly... so 716 * determine it again, overwriting old values if necessary. */ 717 bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery); 718 719 /* we re-scan all devices, not just the ones connected to this 720 * socket. This does not matter, though. */ 721 bus_rescan_devices(&pcmcia_bus_type); 722 } 723 724 static inline int pcmcia_devmatch(struct pcmcia_device *dev, 725 struct pcmcia_device_id *did) 726 { 727 if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) { 728 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id)) 729 return 0; 730 } 731 732 if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) { 733 if ((!dev->has_card_id) || (dev->card_id != did->card_id)) 734 return 0; 735 } 736 737 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) { 738 if (dev->func != did->function) 739 return 0; 740 } 741 742 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) { 743 if (!dev->prod_id[0]) 744 return 0; 745 if (strcmp(did->prod_id[0], dev->prod_id[0])) 746 return 0; 747 } 748 749 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) { 750 if (!dev->prod_id[1]) 751 return 0; 752 if (strcmp(did->prod_id[1], dev->prod_id[1])) 753 return 0; 754 } 755 756 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) { 757 if (!dev->prod_id[2]) 758 return 0; 759 if (strcmp(did->prod_id[2], dev->prod_id[2])) 760 return 0; 761 } 762 763 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) { 764 if (!dev->prod_id[3]) 765 return 0; 766 if (strcmp(did->prod_id[3], dev->prod_id[3])) 767 return 0; 768 } 769 770 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) { 771 if (dev->device_no != did->device_no) 772 return 0; 773 } 774 775 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) { 776 if ((!dev->has_func_id) || (dev->func_id != did->func_id)) 777 return 0; 778 779 /* if this is a pseudo-multi-function device, 780 * we need explicit matches */ 781 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) 782 return 0; 783 if (dev->device_no) 784 return 0; 785 786 /* also, FUNC_ID matching needs to be activated by userspace 787 * after it has re-checked that there is no possible module 788 * with a prod_id/manf_id/card_id match. 789 */ 790 if (!dev->allow_func_id_match) 791 return 0; 792 } 793 794 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) { 795 if (!dev->socket->fake_cis) 796 pcmcia_load_firmware(dev, did->cisfile); 797 798 if (!dev->socket->fake_cis) 799 return 0; 800 } 801 802 if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) { 803 int i; 804 for (i=0; i<4; i++) 805 if (dev->prod_id[i]) 806 return 0; 807 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id) 808 return 0; 809 } 810 811 dev->dev.driver_data = (void *) did; 812 813 return 1; 814 } 815 816 817 static int pcmcia_bus_match(struct device * dev, struct device_driver * drv) { 818 struct pcmcia_device * p_dev = to_pcmcia_dev(dev); 819 struct pcmcia_driver * p_drv = to_pcmcia_drv(drv); 820 struct pcmcia_device_id *did = p_drv->id_table; 821 822 /* matching by cardmgr */ 823 if (p_dev->cardmgr == p_drv) 824 return 1; 825 826 while (did && did->match_flags) { 827 if (pcmcia_devmatch(p_dev, did)) 828 return 1; 829 did++; 830 } 831 832 return 0; 833 } 834 835 #ifdef CONFIG_HOTPLUG 836 837 static int pcmcia_bus_uevent(struct device *dev, char **envp, int num_envp, 838 char *buffer, int buffer_size) 839 { 840 struct pcmcia_device *p_dev; 841 int i, length = 0; 842 u32 hash[4] = { 0, 0, 0, 0}; 843 844 if (!dev) 845 return -ENODEV; 846 847 p_dev = to_pcmcia_dev(dev); 848 849 /* calculate hashes */ 850 for (i=0; i<4; i++) { 851 if (!p_dev->prod_id[i]) 852 continue; 853 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i])); 854 } 855 856 i = 0; 857 858 if (add_uevent_var(envp, num_envp, &i, 859 buffer, buffer_size, &length, 860 "SOCKET_NO=%u", 861 p_dev->socket->sock)) 862 return -ENOMEM; 863 864 if (add_uevent_var(envp, num_envp, &i, 865 buffer, buffer_size, &length, 866 "DEVICE_NO=%02X", 867 p_dev->device_no)) 868 return -ENOMEM; 869 870 if (add_uevent_var(envp, num_envp, &i, 871 buffer, buffer_size, &length, 872 "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X" 873 "pa%08Xpb%08Xpc%08Xpd%08X", 874 p_dev->has_manf_id ? p_dev->manf_id : 0, 875 p_dev->has_card_id ? p_dev->card_id : 0, 876 p_dev->has_func_id ? p_dev->func_id : 0, 877 p_dev->func, 878 p_dev->device_no, 879 hash[0], 880 hash[1], 881 hash[2], 882 hash[3])) 883 return -ENOMEM; 884 885 envp[i] = NULL; 886 887 return 0; 888 } 889 890 #else 891 892 static int pcmcia_bus_uevent(struct device *dev, char **envp, int num_envp, 893 char *buffer, int buffer_size) 894 { 895 return -ENODEV; 896 } 897 898 #endif 899 900 /************************ per-device sysfs output ***************************/ 901 902 #define pcmcia_device_attr(field, test, format) \ 903 static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf) \ 904 { \ 905 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \ 906 return p_dev->test ? sprintf (buf, format, p_dev->field) : -ENODEV; \ 907 } 908 909 #define pcmcia_device_stringattr(name, field) \ 910 static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf) \ 911 { \ 912 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \ 913 return p_dev->field ? sprintf (buf, "%s\n", p_dev->field) : -ENODEV; \ 914 } 915 916 pcmcia_device_attr(func, socket, "0x%02x\n"); 917 pcmcia_device_attr(func_id, has_func_id, "0x%02x\n"); 918 pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n"); 919 pcmcia_device_attr(card_id, has_card_id, "0x%04x\n"); 920 pcmcia_device_stringattr(prod_id1, prod_id[0]); 921 pcmcia_device_stringattr(prod_id2, prod_id[1]); 922 pcmcia_device_stringattr(prod_id3, prod_id[2]); 923 pcmcia_device_stringattr(prod_id4, prod_id[3]); 924 925 926 static ssize_t pcmcia_show_pm_state(struct device *dev, struct device_attribute *attr, char *buf) 927 { 928 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 929 930 if (p_dev->dev.power.power_state.event != PM_EVENT_ON) 931 return sprintf(buf, "off\n"); 932 else 933 return sprintf(buf, "on\n"); 934 } 935 936 static ssize_t pcmcia_store_pm_state(struct device *dev, struct device_attribute *attr, 937 const char *buf, size_t count) 938 { 939 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 940 int ret = 0; 941 942 if (!count) 943 return -EINVAL; 944 945 if ((p_dev->dev.power.power_state.event == PM_EVENT_ON) && 946 (!strncmp(buf, "off", 3))) 947 ret = dpm_runtime_suspend(dev, PMSG_SUSPEND); 948 else if ((p_dev->dev.power.power_state.event != PM_EVENT_ON) && 949 (!strncmp(buf, "on", 2))) 950 dpm_runtime_resume(dev); 951 952 return ret ? ret : count; 953 } 954 955 956 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf) 957 { 958 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 959 int i; 960 u32 hash[4] = { 0, 0, 0, 0}; 961 962 /* calculate hashes */ 963 for (i=0; i<4; i++) { 964 if (!p_dev->prod_id[i]) 965 continue; 966 hash[i] = crc32(0,p_dev->prod_id[i],strlen(p_dev->prod_id[i])); 967 } 968 return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X" 969 "pa%08Xpb%08Xpc%08Xpd%08X\n", 970 p_dev->has_manf_id ? p_dev->manf_id : 0, 971 p_dev->has_card_id ? p_dev->card_id : 0, 972 p_dev->has_func_id ? p_dev->func_id : 0, 973 p_dev->func, p_dev->device_no, 974 hash[0], hash[1], hash[2], hash[3]); 975 } 976 977 static ssize_t pcmcia_store_allow_func_id_match(struct device *dev, 978 struct device_attribute *attr, const char *buf, size_t count) 979 { 980 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 981 982 if (!count) 983 return -EINVAL; 984 985 down(&p_dev->socket->skt_sem); 986 p_dev->allow_func_id_match = 1; 987 up(&p_dev->socket->skt_sem); 988 989 bus_rescan_devices(&pcmcia_bus_type); 990 991 return count; 992 } 993 994 static struct device_attribute pcmcia_dev_attrs[] = { 995 __ATTR(function, 0444, func_show, NULL), 996 __ATTR(pm_state, 0644, pcmcia_show_pm_state, pcmcia_store_pm_state), 997 __ATTR_RO(func_id), 998 __ATTR_RO(manf_id), 999 __ATTR_RO(card_id), 1000 __ATTR_RO(prod_id1), 1001 __ATTR_RO(prod_id2), 1002 __ATTR_RO(prod_id3), 1003 __ATTR_RO(prod_id4), 1004 __ATTR_RO(modalias), 1005 __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match), 1006 __ATTR_NULL, 1007 }; 1008 1009 /* PM support, also needed for reset */ 1010 1011 static int pcmcia_dev_suspend(struct device * dev, pm_message_t state) 1012 { 1013 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1014 struct pcmcia_driver *p_drv = NULL; 1015 1016 if (dev->driver) 1017 p_drv = to_pcmcia_drv(dev->driver); 1018 1019 if (p_drv && p_drv->suspend) 1020 return p_drv->suspend(p_dev); 1021 1022 return 0; 1023 } 1024 1025 1026 static int pcmcia_dev_resume(struct device * dev) 1027 { 1028 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1029 struct pcmcia_driver *p_drv = NULL; 1030 1031 if (dev->driver) 1032 p_drv = to_pcmcia_drv(dev->driver); 1033 1034 if (p_drv && p_drv->resume) 1035 return p_drv->resume(p_dev); 1036 1037 return 0; 1038 } 1039 1040 1041 static int pcmcia_bus_suspend_callback(struct device *dev, void * _data) 1042 { 1043 struct pcmcia_socket *skt = _data; 1044 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1045 1046 if (p_dev->socket != skt) 1047 return 0; 1048 1049 return dpm_runtime_suspend(dev, PMSG_SUSPEND); 1050 } 1051 1052 static int pcmcia_bus_resume_callback(struct device *dev, void * _data) 1053 { 1054 struct pcmcia_socket *skt = _data; 1055 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); 1056 1057 if (p_dev->socket != skt) 1058 return 0; 1059 1060 dpm_runtime_resume(dev); 1061 1062 return 0; 1063 } 1064 1065 static int pcmcia_bus_resume(struct pcmcia_socket *skt) 1066 { 1067 bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback); 1068 return 0; 1069 } 1070 1071 static int pcmcia_bus_suspend(struct pcmcia_socket *skt) 1072 { 1073 if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt, 1074 pcmcia_bus_suspend_callback)) { 1075 pcmcia_bus_resume(skt); 1076 return -EIO; 1077 } 1078 return 0; 1079 } 1080 1081 1082 /*====================================================================== 1083 1084 The card status event handler. 1085 1086 ======================================================================*/ 1087 1088 /* Normally, the event is passed to individual drivers after 1089 * informing userspace. Only for CS_EVENT_CARD_REMOVAL this 1090 * is inversed to maintain historic compatibility. 1091 */ 1092 1093 static int ds_event(struct pcmcia_socket *skt, event_t event, int priority) 1094 { 1095 struct pcmcia_socket *s = pcmcia_get_socket(skt); 1096 1097 ds_dbg(1, "ds_event(0x%06x, %d, 0x%p)\n", 1098 event, priority, skt); 1099 1100 switch (event) { 1101 case CS_EVENT_CARD_REMOVAL: 1102 s->pcmcia_state.present = 0; 1103 pcmcia_card_remove(skt); 1104 handle_event(skt, event); 1105 break; 1106 1107 case CS_EVENT_CARD_INSERTION: 1108 s->pcmcia_state.present = 1; 1109 pcmcia_card_add(skt); 1110 handle_event(skt, event); 1111 break; 1112 1113 case CS_EVENT_EJECTION_REQUEST: 1114 break; 1115 1116 case CS_EVENT_PM_SUSPEND: 1117 case CS_EVENT_PM_RESUME: 1118 case CS_EVENT_RESET_PHYSICAL: 1119 case CS_EVENT_CARD_RESET: 1120 default: 1121 handle_event(skt, event); 1122 break; 1123 } 1124 1125 pcmcia_put_socket(s); 1126 1127 return 0; 1128 } /* ds_event */ 1129 1130 1131 static struct pcmcia_callback pcmcia_bus_callback = { 1132 .owner = THIS_MODULE, 1133 .event = ds_event, 1134 .requery = pcmcia_bus_rescan, 1135 .suspend = pcmcia_bus_suspend, 1136 .resume = pcmcia_bus_resume, 1137 }; 1138 1139 static int __devinit pcmcia_bus_add_socket(struct class_device *class_dev, 1140 struct class_interface *class_intf) 1141 { 1142 struct pcmcia_socket *socket = class_get_devdata(class_dev); 1143 int ret; 1144 1145 socket = pcmcia_get_socket(socket); 1146 if (!socket) { 1147 printk(KERN_ERR "PCMCIA obtaining reference to socket %p failed\n", socket); 1148 return -ENODEV; 1149 } 1150 1151 /* 1152 * Ugly. But we want to wait for the socket threads to have started up. 1153 * We really should let the drivers themselves drive some of this.. 1154 */ 1155 msleep(250); 1156 1157 #ifdef CONFIG_PCMCIA_IOCTL 1158 init_waitqueue_head(&socket->queue); 1159 #endif 1160 INIT_LIST_HEAD(&socket->devices_list); 1161 INIT_WORK(&socket->device_add, pcmcia_delayed_add_pseudo_device, socket); 1162 memset(&socket->pcmcia_state, 0, sizeof(u8)); 1163 socket->device_count = 0; 1164 1165 ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback); 1166 if (ret) { 1167 printk(KERN_ERR "PCMCIA registration PCCard core failed for socket %p\n", socket); 1168 pcmcia_put_socket(socket); 1169 return (ret); 1170 } 1171 1172 return 0; 1173 } 1174 1175 static void pcmcia_bus_remove_socket(struct class_device *class_dev, 1176 struct class_interface *class_intf) 1177 { 1178 struct pcmcia_socket *socket = class_get_devdata(class_dev); 1179 1180 if (!socket) 1181 return; 1182 1183 socket->pcmcia_state.dead = 1; 1184 pccard_register_pcmcia(socket, NULL); 1185 1186 pcmcia_put_socket(socket); 1187 1188 return; 1189 } 1190 1191 1192 /* the pcmcia_bus_interface is used to handle pcmcia socket devices */ 1193 static struct class_interface pcmcia_bus_interface = { 1194 .class = &pcmcia_socket_class, 1195 .add = &pcmcia_bus_add_socket, 1196 .remove = &pcmcia_bus_remove_socket, 1197 }; 1198 1199 1200 struct bus_type pcmcia_bus_type = { 1201 .name = "pcmcia", 1202 .uevent = pcmcia_bus_uevent, 1203 .match = pcmcia_bus_match, 1204 .dev_attrs = pcmcia_dev_attrs, 1205 .probe = pcmcia_device_probe, 1206 .remove = pcmcia_device_remove, 1207 .suspend = pcmcia_dev_suspend, 1208 .resume = pcmcia_dev_resume, 1209 }; 1210 1211 1212 static int __init init_pcmcia_bus(void) 1213 { 1214 spin_lock_init(&pcmcia_dev_list_lock); 1215 1216 bus_register(&pcmcia_bus_type); 1217 class_interface_register(&pcmcia_bus_interface); 1218 1219 pcmcia_setup_ioctl(); 1220 1221 return 0; 1222 } 1223 fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that 1224 * pcmcia_socket_class is already registered */ 1225 1226 1227 static void __exit exit_pcmcia_bus(void) 1228 { 1229 pcmcia_cleanup_ioctl(); 1230 1231 class_interface_unregister(&pcmcia_bus_interface); 1232 1233 bus_unregister(&pcmcia_bus_type); 1234 } 1235 module_exit(exit_pcmcia_bus); 1236 1237 1238 MODULE_ALIAS("ds"); 1239