1 /* 2 * dvbdev.c 3 * 4 * Copyright (C) 2000 Ralph Metzler <ralph@convergence.de> 5 * & Marcus Metzler <marcus@convergence.de> 6 * for convergence integrated media GmbH 7 * 8 * This program is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU Lesser General Public License 10 * as published by the Free Software Foundation; either version 2.1 11 * of the License, or (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 */ 19 20 #define pr_fmt(fmt) "dvbdev: " fmt 21 22 #include <linux/types.h> 23 #include <linux/errno.h> 24 #include <linux/string.h> 25 #include <linux/module.h> 26 #include <linux/kernel.h> 27 #include <linux/init.h> 28 #include <linux/slab.h> 29 #include <linux/device.h> 30 #include <linux/fs.h> 31 #include <linux/cdev.h> 32 #include <linux/mutex.h> 33 #include <media/dvbdev.h> 34 35 /* Due to enum tuner_pad_index */ 36 #include <media/tuner.h> 37 38 static DEFINE_MUTEX(dvbdev_mutex); 39 static int dvbdev_debug; 40 41 module_param(dvbdev_debug, int, 0644); 42 MODULE_PARM_DESC(dvbdev_debug, "Turn on/off device debugging (default:off)."); 43 44 #define dprintk(fmt, arg...) do { \ 45 if (dvbdev_debug) \ 46 printk(KERN_DEBUG pr_fmt("%s: " fmt), \ 47 __func__, ##arg); \ 48 } while (0) 49 50 static LIST_HEAD(dvb_adapter_list); 51 static DEFINE_MUTEX(dvbdev_register_lock); 52 53 static const char * const dnames[] = { 54 [DVB_DEVICE_VIDEO] = "video", 55 [DVB_DEVICE_AUDIO] = "audio", 56 [DVB_DEVICE_SEC] = "sec", 57 [DVB_DEVICE_FRONTEND] = "frontend", 58 [DVB_DEVICE_DEMUX] = "demux", 59 [DVB_DEVICE_DVR] = "dvr", 60 [DVB_DEVICE_CA] = "ca", 61 [DVB_DEVICE_NET] = "net", 62 [DVB_DEVICE_OSD] = "osd" 63 }; 64 65 #ifdef CONFIG_DVB_DYNAMIC_MINORS 66 #define MAX_DVB_MINORS 256 67 #define DVB_MAX_IDS MAX_DVB_MINORS 68 #else 69 #define DVB_MAX_IDS 4 70 71 static const u8 minor_type[] = { 72 [DVB_DEVICE_VIDEO] = 0, 73 [DVB_DEVICE_AUDIO] = 1, 74 [DVB_DEVICE_SEC] = 2, 75 [DVB_DEVICE_FRONTEND] = 3, 76 [DVB_DEVICE_DEMUX] = 4, 77 [DVB_DEVICE_DVR] = 5, 78 [DVB_DEVICE_CA] = 6, 79 [DVB_DEVICE_NET] = 7, 80 [DVB_DEVICE_OSD] = 8, 81 }; 82 83 #define nums2minor(num, type, id) \ 84 (((num) << 6) | ((id) << 4) | minor_type[type]) 85 86 #define MAX_DVB_MINORS (DVB_MAX_ADAPTERS*64) 87 #endif 88 89 static struct class *dvb_class; 90 91 static struct dvb_device *dvb_minors[MAX_DVB_MINORS]; 92 static DECLARE_RWSEM(minor_rwsem); 93 94 static int dvb_device_open(struct inode *inode, struct file *file) 95 { 96 struct dvb_device *dvbdev; 97 98 mutex_lock(&dvbdev_mutex); 99 down_read(&minor_rwsem); 100 dvbdev = dvb_minors[iminor(inode)]; 101 102 if (dvbdev && dvbdev->fops) { 103 int err = 0; 104 const struct file_operations *new_fops; 105 106 new_fops = fops_get(dvbdev->fops); 107 if (!new_fops) 108 goto fail; 109 file->private_data = dvbdev; 110 replace_fops(file, new_fops); 111 if (file->f_op->open) 112 err = file->f_op->open(inode, file); 113 up_read(&minor_rwsem); 114 mutex_unlock(&dvbdev_mutex); 115 return err; 116 } 117 fail: 118 up_read(&minor_rwsem); 119 mutex_unlock(&dvbdev_mutex); 120 return -ENODEV; 121 } 122 123 124 static const struct file_operations dvb_device_fops = 125 { 126 .owner = THIS_MODULE, 127 .open = dvb_device_open, 128 .llseek = noop_llseek, 129 }; 130 131 static struct cdev dvb_device_cdev; 132 133 int dvb_generic_open(struct inode *inode, struct file *file) 134 { 135 struct dvb_device *dvbdev = file->private_data; 136 137 if (!dvbdev) 138 return -ENODEV; 139 140 if (!dvbdev->users) 141 return -EBUSY; 142 143 if ((file->f_flags & O_ACCMODE) == O_RDONLY) { 144 if (!dvbdev->readers) 145 return -EBUSY; 146 dvbdev->readers--; 147 } else { 148 if (!dvbdev->writers) 149 return -EBUSY; 150 dvbdev->writers--; 151 } 152 153 dvbdev->users--; 154 return 0; 155 } 156 EXPORT_SYMBOL(dvb_generic_open); 157 158 159 int dvb_generic_release(struct inode *inode, struct file *file) 160 { 161 struct dvb_device *dvbdev = file->private_data; 162 163 if (!dvbdev) 164 return -ENODEV; 165 166 if ((file->f_flags & O_ACCMODE) == O_RDONLY) { 167 dvbdev->readers++; 168 } else { 169 dvbdev->writers++; 170 } 171 172 dvbdev->users++; 173 return 0; 174 } 175 EXPORT_SYMBOL(dvb_generic_release); 176 177 178 long dvb_generic_ioctl(struct file *file, 179 unsigned int cmd, unsigned long arg) 180 { 181 struct dvb_device *dvbdev = file->private_data; 182 183 if (!dvbdev) 184 return -ENODEV; 185 186 if (!dvbdev->kernel_ioctl) 187 return -EINVAL; 188 189 return dvb_usercopy(file, cmd, arg, dvbdev->kernel_ioctl); 190 } 191 EXPORT_SYMBOL(dvb_generic_ioctl); 192 193 194 static int dvbdev_get_free_id (struct dvb_adapter *adap, int type) 195 { 196 u32 id = 0; 197 198 while (id < DVB_MAX_IDS) { 199 struct dvb_device *dev; 200 list_for_each_entry(dev, &adap->device_list, list_head) 201 if (dev->type == type && dev->id == id) 202 goto skip; 203 return id; 204 skip: 205 id++; 206 } 207 return -ENFILE; 208 } 209 210 static void dvb_media_device_free(struct dvb_device *dvbdev) 211 { 212 #if defined(CONFIG_MEDIA_CONTROLLER_DVB) 213 if (dvbdev->entity) { 214 media_device_unregister_entity(dvbdev->entity); 215 kfree(dvbdev->entity); 216 kfree(dvbdev->pads); 217 dvbdev->entity = NULL; 218 dvbdev->pads = NULL; 219 } 220 221 if (dvbdev->tsout_entity) { 222 int i; 223 224 for (i = 0; i < dvbdev->tsout_num_entities; i++) { 225 media_device_unregister_entity(&dvbdev->tsout_entity[i]); 226 kfree(dvbdev->tsout_entity[i].name); 227 } 228 kfree(dvbdev->tsout_entity); 229 kfree(dvbdev->tsout_pads); 230 dvbdev->tsout_entity = NULL; 231 dvbdev->tsout_pads = NULL; 232 233 dvbdev->tsout_num_entities = 0; 234 } 235 236 if (dvbdev->intf_devnode) { 237 media_devnode_remove(dvbdev->intf_devnode); 238 dvbdev->intf_devnode = NULL; 239 } 240 241 if (dvbdev->adapter->conn) { 242 media_device_unregister_entity(dvbdev->adapter->conn); 243 dvbdev->adapter->conn = NULL; 244 kfree(dvbdev->adapter->conn_pads); 245 dvbdev->adapter->conn_pads = NULL; 246 } 247 #endif 248 } 249 250 #if defined(CONFIG_MEDIA_CONTROLLER_DVB) 251 static int dvb_create_tsout_entity(struct dvb_device *dvbdev, 252 const char *name, int npads) 253 { 254 int i, ret = 0; 255 256 dvbdev->tsout_pads = kcalloc(npads, sizeof(*dvbdev->tsout_pads), 257 GFP_KERNEL); 258 if (!dvbdev->tsout_pads) 259 return -ENOMEM; 260 261 dvbdev->tsout_entity = kcalloc(npads, sizeof(*dvbdev->tsout_entity), 262 GFP_KERNEL); 263 if (!dvbdev->tsout_entity) 264 return -ENOMEM; 265 266 dvbdev->tsout_num_entities = npads; 267 268 for (i = 0; i < npads; i++) { 269 struct media_pad *pads = &dvbdev->tsout_pads[i]; 270 struct media_entity *entity = &dvbdev->tsout_entity[i]; 271 272 entity->name = kasprintf(GFP_KERNEL, "%s #%d", name, i); 273 if (!entity->name) 274 return -ENOMEM; 275 276 entity->function = MEDIA_ENT_F_IO_DTV; 277 pads->flags = MEDIA_PAD_FL_SINK; 278 279 ret = media_entity_pads_init(entity, 1, pads); 280 if (ret < 0) 281 return ret; 282 283 ret = media_device_register_entity(dvbdev->adapter->mdev, 284 entity); 285 if (ret < 0) 286 return ret; 287 } 288 return 0; 289 } 290 291 #define DEMUX_TSOUT "demux-tsout" 292 #define DVR_TSOUT "dvr-tsout" 293 294 static int dvb_create_media_entity(struct dvb_device *dvbdev, 295 int type, int demux_sink_pads) 296 { 297 int i, ret, npads; 298 299 switch (type) { 300 case DVB_DEVICE_FRONTEND: 301 npads = 2; 302 break; 303 case DVB_DEVICE_DVR: 304 ret = dvb_create_tsout_entity(dvbdev, DVR_TSOUT, 305 demux_sink_pads); 306 return ret; 307 case DVB_DEVICE_DEMUX: 308 npads = 1 + demux_sink_pads; 309 ret = dvb_create_tsout_entity(dvbdev, DEMUX_TSOUT, 310 demux_sink_pads); 311 if (ret < 0) 312 return ret; 313 break; 314 case DVB_DEVICE_CA: 315 npads = 2; 316 break; 317 case DVB_DEVICE_NET: 318 /* 319 * We should be creating entities for the MPE/ULE 320 * decapsulation hardware (or software implementation). 321 * 322 * However, the number of for the MPE/ULE decaps may not be 323 * fixed. As we don't have yet dynamic support for PADs at 324 * the Media Controller, let's not create the decap 325 * entities yet. 326 */ 327 return 0; 328 default: 329 return 0; 330 } 331 332 dvbdev->entity = kzalloc(sizeof(*dvbdev->entity), GFP_KERNEL); 333 if (!dvbdev->entity) 334 return -ENOMEM; 335 336 dvbdev->entity->name = dvbdev->name; 337 338 if (npads) { 339 dvbdev->pads = kcalloc(npads, sizeof(*dvbdev->pads), 340 GFP_KERNEL); 341 if (!dvbdev->pads) 342 return -ENOMEM; 343 } 344 345 switch (type) { 346 case DVB_DEVICE_FRONTEND: 347 dvbdev->entity->function = MEDIA_ENT_F_DTV_DEMOD; 348 dvbdev->pads[0].flags = MEDIA_PAD_FL_SINK; 349 dvbdev->pads[1].flags = MEDIA_PAD_FL_SOURCE; 350 break; 351 case DVB_DEVICE_DEMUX: 352 dvbdev->entity->function = MEDIA_ENT_F_TS_DEMUX; 353 dvbdev->pads[0].flags = MEDIA_PAD_FL_SINK; 354 for (i = 1; i < npads; i++) 355 dvbdev->pads[i].flags = MEDIA_PAD_FL_SOURCE; 356 break; 357 case DVB_DEVICE_CA: 358 dvbdev->entity->function = MEDIA_ENT_F_DTV_CA; 359 dvbdev->pads[0].flags = MEDIA_PAD_FL_SINK; 360 dvbdev->pads[1].flags = MEDIA_PAD_FL_SOURCE; 361 break; 362 default: 363 /* Should never happen, as the first switch prevents it */ 364 kfree(dvbdev->entity); 365 kfree(dvbdev->pads); 366 dvbdev->entity = NULL; 367 dvbdev->pads = NULL; 368 return 0; 369 } 370 371 if (npads) { 372 ret = media_entity_pads_init(dvbdev->entity, npads, dvbdev->pads); 373 if (ret) 374 return ret; 375 } 376 ret = media_device_register_entity(dvbdev->adapter->mdev, 377 dvbdev->entity); 378 if (ret) 379 return ret; 380 381 pr_info("%s: media entity '%s' registered.\n", 382 __func__, dvbdev->entity->name); 383 384 return 0; 385 } 386 #endif 387 388 static int dvb_register_media_device(struct dvb_device *dvbdev, 389 int type, int minor, 390 unsigned demux_sink_pads) 391 { 392 #if defined(CONFIG_MEDIA_CONTROLLER_DVB) 393 struct media_link *link; 394 u32 intf_type; 395 int ret; 396 397 if (!dvbdev->adapter->mdev) 398 return 0; 399 400 ret = dvb_create_media_entity(dvbdev, type, demux_sink_pads); 401 if (ret) 402 return ret; 403 404 switch (type) { 405 case DVB_DEVICE_FRONTEND: 406 intf_type = MEDIA_INTF_T_DVB_FE; 407 break; 408 case DVB_DEVICE_DEMUX: 409 intf_type = MEDIA_INTF_T_DVB_DEMUX; 410 break; 411 case DVB_DEVICE_DVR: 412 intf_type = MEDIA_INTF_T_DVB_DVR; 413 break; 414 case DVB_DEVICE_CA: 415 intf_type = MEDIA_INTF_T_DVB_CA; 416 break; 417 case DVB_DEVICE_NET: 418 intf_type = MEDIA_INTF_T_DVB_NET; 419 break; 420 default: 421 return 0; 422 } 423 424 dvbdev->intf_devnode = media_devnode_create(dvbdev->adapter->mdev, 425 intf_type, 0, 426 DVB_MAJOR, minor); 427 428 if (!dvbdev->intf_devnode) 429 return -ENOMEM; 430 431 /* 432 * Create the "obvious" link, e. g. the ones that represent 433 * a direct association between an interface and an entity. 434 * Other links should be created elsewhere, like: 435 * DVB FE intf -> tuner 436 * DVB demux intf -> dvr 437 */ 438 439 if (!dvbdev->entity) 440 return 0; 441 442 link = media_create_intf_link(dvbdev->entity, &dvbdev->intf_devnode->intf, 443 MEDIA_LNK_FL_ENABLED); 444 if (!link) 445 return -ENOMEM; 446 #endif 447 return 0; 448 } 449 450 int dvb_register_device(struct dvb_adapter *adap, struct dvb_device **pdvbdev, 451 const struct dvb_device *template, void *priv, 452 enum dvb_device_type type, int demux_sink_pads) 453 { 454 struct dvb_device *dvbdev; 455 struct file_operations *dvbdevfops; 456 struct device *clsdev; 457 int minor; 458 int id, ret; 459 460 mutex_lock(&dvbdev_register_lock); 461 462 if ((id = dvbdev_get_free_id (adap, type)) < 0){ 463 mutex_unlock(&dvbdev_register_lock); 464 *pdvbdev = NULL; 465 pr_err("%s: couldn't find free device id\n", __func__); 466 return -ENFILE; 467 } 468 469 *pdvbdev = dvbdev = kzalloc(sizeof(*dvbdev), GFP_KERNEL); 470 471 if (!dvbdev){ 472 mutex_unlock(&dvbdev_register_lock); 473 return -ENOMEM; 474 } 475 476 dvbdevfops = kzalloc(sizeof(struct file_operations), GFP_KERNEL); 477 478 if (!dvbdevfops){ 479 kfree (dvbdev); 480 mutex_unlock(&dvbdev_register_lock); 481 return -ENOMEM; 482 } 483 484 memcpy(dvbdev, template, sizeof(struct dvb_device)); 485 dvbdev->type = type; 486 dvbdev->id = id; 487 dvbdev->adapter = adap; 488 dvbdev->priv = priv; 489 dvbdev->fops = dvbdevfops; 490 init_waitqueue_head (&dvbdev->wait_queue); 491 492 memcpy(dvbdevfops, template->fops, sizeof(struct file_operations)); 493 dvbdevfops->owner = adap->module; 494 495 list_add_tail (&dvbdev->list_head, &adap->device_list); 496 497 down_write(&minor_rwsem); 498 #ifdef CONFIG_DVB_DYNAMIC_MINORS 499 for (minor = 0; minor < MAX_DVB_MINORS; minor++) 500 if (dvb_minors[minor] == NULL) 501 break; 502 503 if (minor == MAX_DVB_MINORS) { 504 kfree(dvbdevfops); 505 kfree(dvbdev); 506 up_write(&minor_rwsem); 507 mutex_unlock(&dvbdev_register_lock); 508 return -EINVAL; 509 } 510 #else 511 minor = nums2minor(adap->num, type, id); 512 #endif 513 514 dvbdev->minor = minor; 515 dvb_minors[minor] = dvbdev; 516 up_write(&minor_rwsem); 517 518 ret = dvb_register_media_device(dvbdev, type, minor, demux_sink_pads); 519 if (ret) { 520 pr_err("%s: dvb_register_media_device failed to create the mediagraph\n", 521 __func__); 522 523 dvb_media_device_free(dvbdev); 524 kfree(dvbdevfops); 525 kfree(dvbdev); 526 up_write(&minor_rwsem); 527 mutex_unlock(&dvbdev_register_lock); 528 return ret; 529 } 530 531 mutex_unlock(&dvbdev_register_lock); 532 533 clsdev = device_create(dvb_class, adap->device, 534 MKDEV(DVB_MAJOR, minor), 535 dvbdev, "dvb%d.%s%d", adap->num, dnames[type], id); 536 if (IS_ERR(clsdev)) { 537 pr_err("%s: failed to create device dvb%d.%s%d (%ld)\n", 538 __func__, adap->num, dnames[type], id, PTR_ERR(clsdev)); 539 return PTR_ERR(clsdev); 540 } 541 dprintk("DVB: register adapter%d/%s%d @ minor: %i (0x%02x)\n", 542 adap->num, dnames[type], id, minor, minor); 543 544 return 0; 545 } 546 EXPORT_SYMBOL(dvb_register_device); 547 548 549 void dvb_remove_device(struct dvb_device *dvbdev) 550 { 551 if (!dvbdev) 552 return; 553 554 down_write(&minor_rwsem); 555 dvb_minors[dvbdev->minor] = NULL; 556 up_write(&minor_rwsem); 557 558 dvb_media_device_free(dvbdev); 559 560 device_destroy(dvb_class, MKDEV(DVB_MAJOR, dvbdev->minor)); 561 562 list_del (&dvbdev->list_head); 563 } 564 EXPORT_SYMBOL(dvb_remove_device); 565 566 567 void dvb_free_device(struct dvb_device *dvbdev) 568 { 569 if (!dvbdev) 570 return; 571 572 kfree (dvbdev->fops); 573 kfree (dvbdev); 574 } 575 EXPORT_SYMBOL(dvb_free_device); 576 577 578 void dvb_unregister_device(struct dvb_device *dvbdev) 579 { 580 dvb_remove_device(dvbdev); 581 dvb_free_device(dvbdev); 582 } 583 EXPORT_SYMBOL(dvb_unregister_device); 584 585 586 #ifdef CONFIG_MEDIA_CONTROLLER_DVB 587 588 static int dvb_create_io_intf_links(struct dvb_adapter *adap, 589 struct media_interface *intf, 590 char *name) 591 { 592 struct media_device *mdev = adap->mdev; 593 struct media_entity *entity; 594 struct media_link *link; 595 596 media_device_for_each_entity(entity, mdev) { 597 if (entity->function == MEDIA_ENT_F_IO_DTV) { 598 if (strncmp(entity->name, name, strlen(name))) 599 continue; 600 link = media_create_intf_link(entity, intf, 601 MEDIA_LNK_FL_ENABLED); 602 if (!link) 603 return -ENOMEM; 604 } 605 } 606 return 0; 607 } 608 609 int dvb_create_media_graph(struct dvb_adapter *adap, 610 bool create_rf_connector) 611 { 612 struct media_device *mdev = adap->mdev; 613 struct media_entity *entity, *tuner = NULL, *demod = NULL, *conn; 614 struct media_entity *demux = NULL, *ca = NULL; 615 struct media_link *link; 616 struct media_interface *intf; 617 unsigned demux_pad = 0; 618 unsigned dvr_pad = 0; 619 unsigned ntuner = 0, ndemod = 0; 620 int ret; 621 static const char *connector_name = "Television"; 622 623 if (!mdev) 624 return 0; 625 626 media_device_for_each_entity(entity, mdev) { 627 switch (entity->function) { 628 case MEDIA_ENT_F_TUNER: 629 tuner = entity; 630 ntuner++; 631 break; 632 case MEDIA_ENT_F_DTV_DEMOD: 633 demod = entity; 634 ndemod++; 635 break; 636 case MEDIA_ENT_F_TS_DEMUX: 637 demux = entity; 638 break; 639 case MEDIA_ENT_F_DTV_CA: 640 ca = entity; 641 break; 642 } 643 } 644 645 /* 646 * Prepare to signalize to media_create_pad_links() that multiple 647 * entities of the same type exists and a 1:n or n:1 links need to be 648 * created. 649 * NOTE: if both tuner and demod have multiple instances, it is up 650 * to the caller driver to create such links. 651 */ 652 if (ntuner > 1) 653 tuner = NULL; 654 if (ndemod > 1) 655 demod = NULL; 656 657 if (create_rf_connector) { 658 conn = kzalloc(sizeof(*conn), GFP_KERNEL); 659 if (!conn) 660 return -ENOMEM; 661 adap->conn = conn; 662 663 adap->conn_pads = kzalloc(sizeof(*adap->conn_pads), GFP_KERNEL); 664 if (!adap->conn_pads) 665 return -ENOMEM; 666 667 conn->flags = MEDIA_ENT_FL_CONNECTOR; 668 conn->function = MEDIA_ENT_F_CONN_RF; 669 conn->name = connector_name; 670 adap->conn_pads->flags = MEDIA_PAD_FL_SOURCE; 671 672 ret = media_entity_pads_init(conn, 1, adap->conn_pads); 673 if (ret) 674 return ret; 675 676 ret = media_device_register_entity(mdev, conn); 677 if (ret) 678 return ret; 679 680 if (!ntuner) 681 ret = media_create_pad_links(mdev, 682 MEDIA_ENT_F_CONN_RF, 683 conn, 0, 684 MEDIA_ENT_F_DTV_DEMOD, 685 demod, 0, 686 MEDIA_LNK_FL_ENABLED, 687 false); 688 else 689 ret = media_create_pad_links(mdev, 690 MEDIA_ENT_F_CONN_RF, 691 conn, 0, 692 MEDIA_ENT_F_TUNER, 693 tuner, TUNER_PAD_RF_INPUT, 694 MEDIA_LNK_FL_ENABLED, 695 false); 696 if (ret) 697 return ret; 698 } 699 700 if (ntuner && ndemod) { 701 ret = media_create_pad_links(mdev, 702 MEDIA_ENT_F_TUNER, 703 tuner, TUNER_PAD_OUTPUT, 704 MEDIA_ENT_F_DTV_DEMOD, 705 demod, 0, MEDIA_LNK_FL_ENABLED, 706 false); 707 if (ret) 708 return ret; 709 } 710 711 if (ndemod && demux) { 712 ret = media_create_pad_links(mdev, 713 MEDIA_ENT_F_DTV_DEMOD, 714 demod, 1, 715 MEDIA_ENT_F_TS_DEMUX, 716 demux, 0, MEDIA_LNK_FL_ENABLED, 717 false); 718 if (ret) 719 return ret; 720 } 721 if (demux && ca) { 722 ret = media_create_pad_link(demux, 1, ca, 723 0, MEDIA_LNK_FL_ENABLED); 724 if (ret) 725 return ret; 726 } 727 728 /* Create demux links for each ringbuffer/pad */ 729 if (demux) { 730 media_device_for_each_entity(entity, mdev) { 731 if (entity->function == MEDIA_ENT_F_IO_DTV) { 732 if (!strncmp(entity->name, DVR_TSOUT, 733 strlen(DVR_TSOUT))) { 734 ret = media_create_pad_link(demux, 735 ++dvr_pad, 736 entity, 0, 0); 737 if (ret) 738 return ret; 739 } 740 if (!strncmp(entity->name, DEMUX_TSOUT, 741 strlen(DEMUX_TSOUT))) { 742 ret = media_create_pad_link(demux, 743 ++demux_pad, 744 entity, 0, 0); 745 if (ret) 746 return ret; 747 } 748 } 749 } 750 } 751 752 /* Create interface links for FE->tuner, DVR->demux and CA->ca */ 753 media_device_for_each_intf(intf, mdev) { 754 if (intf->type == MEDIA_INTF_T_DVB_CA && ca) { 755 link = media_create_intf_link(ca, intf, 756 MEDIA_LNK_FL_ENABLED); 757 if (!link) 758 return -ENOMEM; 759 } 760 761 if (intf->type == MEDIA_INTF_T_DVB_FE && tuner) { 762 link = media_create_intf_link(tuner, intf, 763 MEDIA_LNK_FL_ENABLED); 764 if (!link) 765 return -ENOMEM; 766 } 767 #if 0 768 /* 769 * Indirect link - let's not create yet, as we don't know how 770 * to handle indirect links, nor if this will 771 * actually be needed. 772 */ 773 if (intf->type == MEDIA_INTF_T_DVB_DVR && demux) { 774 link = media_create_intf_link(demux, intf, 775 MEDIA_LNK_FL_ENABLED); 776 if (!link) 777 return -ENOMEM; 778 } 779 #endif 780 if (intf->type == MEDIA_INTF_T_DVB_DVR) { 781 ret = dvb_create_io_intf_links(adap, intf, DVR_TSOUT); 782 if (ret) 783 return ret; 784 } 785 if (intf->type == MEDIA_INTF_T_DVB_DEMUX) { 786 ret = dvb_create_io_intf_links(adap, intf, DEMUX_TSOUT); 787 if (ret) 788 return ret; 789 } 790 } 791 return 0; 792 } 793 EXPORT_SYMBOL_GPL(dvb_create_media_graph); 794 #endif 795 796 static int dvbdev_check_free_adapter_num(int num) 797 { 798 struct list_head *entry; 799 list_for_each(entry, &dvb_adapter_list) { 800 struct dvb_adapter *adap; 801 adap = list_entry(entry, struct dvb_adapter, list_head); 802 if (adap->num == num) 803 return 0; 804 } 805 return 1; 806 } 807 808 static int dvbdev_get_free_adapter_num (void) 809 { 810 int num = 0; 811 812 while (num < DVB_MAX_ADAPTERS) { 813 if (dvbdev_check_free_adapter_num(num)) 814 return num; 815 num++; 816 } 817 818 return -ENFILE; 819 } 820 821 822 int dvb_register_adapter(struct dvb_adapter *adap, const char *name, 823 struct module *module, struct device *device, 824 short *adapter_nums) 825 { 826 int i, num; 827 828 mutex_lock(&dvbdev_register_lock); 829 830 for (i = 0; i < DVB_MAX_ADAPTERS; ++i) { 831 num = adapter_nums[i]; 832 if (num >= 0 && num < DVB_MAX_ADAPTERS) { 833 /* use the one the driver asked for */ 834 if (dvbdev_check_free_adapter_num(num)) 835 break; 836 } else { 837 num = dvbdev_get_free_adapter_num(); 838 break; 839 } 840 num = -1; 841 } 842 843 if (num < 0) { 844 mutex_unlock(&dvbdev_register_lock); 845 return -ENFILE; 846 } 847 848 memset (adap, 0, sizeof(struct dvb_adapter)); 849 INIT_LIST_HEAD (&adap->device_list); 850 851 pr_info("DVB: registering new adapter (%s)\n", name); 852 853 adap->num = num; 854 adap->name = name; 855 adap->module = module; 856 adap->device = device; 857 adap->mfe_shared = 0; 858 adap->mfe_dvbdev = NULL; 859 mutex_init (&adap->mfe_lock); 860 861 list_add_tail (&adap->list_head, &dvb_adapter_list); 862 863 mutex_unlock(&dvbdev_register_lock); 864 865 return num; 866 } 867 EXPORT_SYMBOL(dvb_register_adapter); 868 869 870 int dvb_unregister_adapter(struct dvb_adapter *adap) 871 { 872 mutex_lock(&dvbdev_register_lock); 873 list_del (&adap->list_head); 874 mutex_unlock(&dvbdev_register_lock); 875 return 0; 876 } 877 EXPORT_SYMBOL(dvb_unregister_adapter); 878 879 /* if the miracle happens and "generic_usercopy()" is included into 880 the kernel, then this can vanish. please don't make the mistake and 881 define this as video_usercopy(). this will introduce a dependecy 882 to the v4l "videodev.o" module, which is unnecessary for some 883 cards (ie. the budget dvb-cards don't need the v4l module...) */ 884 int dvb_usercopy(struct file *file, 885 unsigned int cmd, unsigned long arg, 886 int (*func)(struct file *file, 887 unsigned int cmd, void *arg)) 888 { 889 char sbuf[128]; 890 void *mbuf = NULL; 891 void *parg = NULL; 892 int err = -EINVAL; 893 894 /* Copy arguments into temp kernel buffer */ 895 switch (_IOC_DIR(cmd)) { 896 case _IOC_NONE: 897 /* 898 * For this command, the pointer is actually an integer 899 * argument. 900 */ 901 parg = (void *) arg; 902 break; 903 case _IOC_READ: /* some v4l ioctls are marked wrong ... */ 904 case _IOC_WRITE: 905 case (_IOC_WRITE | _IOC_READ): 906 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) { 907 parg = sbuf; 908 } else { 909 /* too big to allocate from stack */ 910 mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL); 911 if (NULL == mbuf) 912 return -ENOMEM; 913 parg = mbuf; 914 } 915 916 err = -EFAULT; 917 if (copy_from_user(parg, (void __user *)arg, _IOC_SIZE(cmd))) 918 goto out; 919 break; 920 } 921 922 /* call driver */ 923 if ((err = func(file, cmd, parg)) == -ENOIOCTLCMD) 924 err = -ENOTTY; 925 926 if (err < 0) 927 goto out; 928 929 /* Copy results into user buffer */ 930 switch (_IOC_DIR(cmd)) 931 { 932 case _IOC_READ: 933 case (_IOC_WRITE | _IOC_READ): 934 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd))) 935 err = -EFAULT; 936 break; 937 } 938 939 out: 940 kfree(mbuf); 941 return err; 942 } 943 944 static int dvb_uevent(struct device *dev, struct kobj_uevent_env *env) 945 { 946 struct dvb_device *dvbdev = dev_get_drvdata(dev); 947 948 add_uevent_var(env, "DVB_ADAPTER_NUM=%d", dvbdev->adapter->num); 949 add_uevent_var(env, "DVB_DEVICE_TYPE=%s", dnames[dvbdev->type]); 950 add_uevent_var(env, "DVB_DEVICE_NUM=%d", dvbdev->id); 951 return 0; 952 } 953 954 static char *dvb_devnode(struct device *dev, umode_t *mode) 955 { 956 struct dvb_device *dvbdev = dev_get_drvdata(dev); 957 958 return kasprintf(GFP_KERNEL, "dvb/adapter%d/%s%d", 959 dvbdev->adapter->num, dnames[dvbdev->type], dvbdev->id); 960 } 961 962 963 static int __init init_dvbdev(void) 964 { 965 int retval; 966 dev_t dev = MKDEV(DVB_MAJOR, 0); 967 968 if ((retval = register_chrdev_region(dev, MAX_DVB_MINORS, "DVB")) != 0) { 969 pr_err("dvb-core: unable to get major %d\n", DVB_MAJOR); 970 return retval; 971 } 972 973 cdev_init(&dvb_device_cdev, &dvb_device_fops); 974 if ((retval = cdev_add(&dvb_device_cdev, dev, MAX_DVB_MINORS)) != 0) { 975 pr_err("dvb-core: unable register character device\n"); 976 goto error; 977 } 978 979 dvb_class = class_create(THIS_MODULE, "dvb"); 980 if (IS_ERR(dvb_class)) { 981 retval = PTR_ERR(dvb_class); 982 goto error; 983 } 984 dvb_class->dev_uevent = dvb_uevent; 985 dvb_class->devnode = dvb_devnode; 986 return 0; 987 988 error: 989 cdev_del(&dvb_device_cdev); 990 unregister_chrdev_region(dev, MAX_DVB_MINORS); 991 return retval; 992 } 993 994 995 static void __exit exit_dvbdev(void) 996 { 997 class_destroy(dvb_class); 998 cdev_del(&dvb_device_cdev); 999 unregister_chrdev_region(MKDEV(DVB_MAJOR, 0), MAX_DVB_MINORS); 1000 } 1001 1002 subsys_initcall(init_dvbdev); 1003 module_exit(exit_dvbdev); 1004 1005 MODULE_DESCRIPTION("DVB Core Driver"); 1006 MODULE_AUTHOR("Marcus Metzler, Ralph Metzler, Holger Waechtler"); 1007 MODULE_LICENSE("GPL"); 1008