1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Driver for the NXP SAA7164 PCIe bridge 4 * 5 * Copyright (c) 2010-2015 Steven Toth <stoth@kernellabs.com> 6 */ 7 8 #include "saa7164.h" 9 10 /* Take the encoder configuration from the port struct and 11 * flush it to the hardware. 12 */ 13 static void saa7164_vbi_configure(struct saa7164_port *port) 14 { 15 struct saa7164_dev *dev = port->dev; 16 dprintk(DBGLVL_VBI, "%s()\n", __func__); 17 18 port->vbi_params.width = port->enc_port->width; 19 port->vbi_params.height = port->enc_port->height; 20 port->vbi_params.is_50hz = 21 (port->enc_port->encodernorm.id & V4L2_STD_625_50) != 0; 22 23 /* Set up the DIF (enable it) for analog mode by default */ 24 saa7164_api_initialize_dif(port); 25 dprintk(DBGLVL_VBI, "%s() ends\n", __func__); 26 } 27 28 static int saa7164_vbi_buffers_dealloc(struct saa7164_port *port) 29 { 30 struct list_head *c, *n, *p, *q, *l, *v; 31 struct saa7164_dev *dev = port->dev; 32 struct saa7164_buffer *buf; 33 struct saa7164_user_buffer *ubuf; 34 35 /* Remove any allocated buffers */ 36 mutex_lock(&port->dmaqueue_lock); 37 38 dprintk(DBGLVL_VBI, "%s(port=%d) dmaqueue\n", __func__, port->nr); 39 list_for_each_safe(c, n, &port->dmaqueue.list) { 40 buf = list_entry(c, struct saa7164_buffer, list); 41 list_del(c); 42 saa7164_buffer_dealloc(buf); 43 } 44 45 dprintk(DBGLVL_VBI, "%s(port=%d) used\n", __func__, port->nr); 46 list_for_each_safe(p, q, &port->list_buf_used.list) { 47 ubuf = list_entry(p, struct saa7164_user_buffer, list); 48 list_del(p); 49 saa7164_buffer_dealloc_user(ubuf); 50 } 51 52 dprintk(DBGLVL_VBI, "%s(port=%d) free\n", __func__, port->nr); 53 list_for_each_safe(l, v, &port->list_buf_free.list) { 54 ubuf = list_entry(l, struct saa7164_user_buffer, list); 55 list_del(l); 56 saa7164_buffer_dealloc_user(ubuf); 57 } 58 59 mutex_unlock(&port->dmaqueue_lock); 60 dprintk(DBGLVL_VBI, "%s(port=%d) done\n", __func__, port->nr); 61 62 return 0; 63 } 64 65 /* Dynamic buffer switch at vbi start time */ 66 static int saa7164_vbi_buffers_alloc(struct saa7164_port *port) 67 { 68 struct saa7164_dev *dev = port->dev; 69 struct saa7164_buffer *buf; 70 struct saa7164_user_buffer *ubuf; 71 struct tmHWStreamParameters *params = &port->hw_streamingparams; 72 int result = -ENODEV, i; 73 int len = 0; 74 75 dprintk(DBGLVL_VBI, "%s()\n", __func__); 76 77 /* TODO: NTSC SPECIFIC */ 78 /* Init and establish defaults */ 79 params->samplesperline = 1440; 80 params->numberoflines = 18; 81 params->pitch = 1440; 82 params->numpagetables = 2 + 83 ((params->numberoflines * params->pitch) / PAGE_SIZE); 84 params->bitspersample = 8; 85 params->linethreshold = 0; 86 params->pagetablelistvirt = NULL; 87 params->pagetablelistphys = NULL; 88 params->numpagetableentries = port->hwcfg.buffercount; 89 90 /* Allocate the PCI resources, buffers (hard) */ 91 for (i = 0; i < port->hwcfg.buffercount; i++) { 92 buf = saa7164_buffer_alloc(port, 93 params->numberoflines * 94 params->pitch); 95 96 if (!buf) { 97 printk(KERN_ERR "%s() failed (errno = %d), unable to allocate buffer\n", 98 __func__, result); 99 result = -ENOMEM; 100 goto failed; 101 } else { 102 103 mutex_lock(&port->dmaqueue_lock); 104 list_add_tail(&buf->list, &port->dmaqueue.list); 105 mutex_unlock(&port->dmaqueue_lock); 106 107 } 108 } 109 110 /* Allocate some kernel buffers for copying 111 * to userpsace. 112 */ 113 len = params->numberoflines * params->pitch; 114 115 if (vbi_buffers < 16) 116 vbi_buffers = 16; 117 if (vbi_buffers > 512) 118 vbi_buffers = 512; 119 120 for (i = 0; i < vbi_buffers; i++) { 121 122 ubuf = saa7164_buffer_alloc_user(dev, len); 123 if (ubuf) { 124 mutex_lock(&port->dmaqueue_lock); 125 list_add_tail(&ubuf->list, &port->list_buf_free.list); 126 mutex_unlock(&port->dmaqueue_lock); 127 } 128 129 } 130 131 result = 0; 132 133 failed: 134 return result; 135 } 136 137 138 static int saa7164_vbi_initialize(struct saa7164_port *port) 139 { 140 saa7164_vbi_configure(port); 141 return 0; 142 } 143 144 /* -- V4L2 --------------------------------------------------------- */ 145 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id id) 146 { 147 struct saa7164_vbi_fh *fh = file->private_data; 148 149 return saa7164_s_std(fh->port->enc_port, id); 150 } 151 152 static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *id) 153 { 154 struct saa7164_encoder_fh *fh = file->private_data; 155 156 return saa7164_g_std(fh->port->enc_port, id); 157 } 158 159 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i) 160 { 161 struct saa7164_vbi_fh *fh = file->private_data; 162 163 return saa7164_g_input(fh->port->enc_port, i); 164 } 165 166 static int vidioc_s_input(struct file *file, void *priv, unsigned int i) 167 { 168 struct saa7164_vbi_fh *fh = file->private_data; 169 170 return saa7164_s_input(fh->port->enc_port, i); 171 } 172 173 static int vidioc_g_frequency(struct file *file, void *priv, 174 struct v4l2_frequency *f) 175 { 176 struct saa7164_vbi_fh *fh = file->private_data; 177 178 return saa7164_g_frequency(fh->port->enc_port, f); 179 } 180 181 static int vidioc_s_frequency(struct file *file, void *priv, 182 const struct v4l2_frequency *f) 183 { 184 struct saa7164_vbi_fh *fh = file->private_data; 185 int ret = saa7164_s_frequency(fh->port->enc_port, f); 186 187 if (ret == 0) 188 saa7164_vbi_initialize(fh->port); 189 return ret; 190 } 191 192 static int vidioc_querycap(struct file *file, void *priv, 193 struct v4l2_capability *cap) 194 { 195 struct saa7164_vbi_fh *fh = file->private_data; 196 struct saa7164_port *port = fh->port; 197 struct saa7164_dev *dev = port->dev; 198 199 strscpy(cap->driver, dev->name, sizeof(cap->driver)); 200 strscpy(cap->card, saa7164_boards[dev->board].name, 201 sizeof(cap->card)); 202 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE | 203 V4L2_CAP_TUNER | V4L2_CAP_VBI_CAPTURE | 204 V4L2_CAP_DEVICE_CAPS; 205 return 0; 206 } 207 208 static int saa7164_vbi_stop_port(struct saa7164_port *port) 209 { 210 struct saa7164_dev *dev = port->dev; 211 int ret; 212 213 ret = saa7164_api_transition_port(port, SAA_DMASTATE_STOP); 214 if ((ret != SAA_OK) && (ret != SAA_ERR_ALREADY_STOPPED)) { 215 printk(KERN_ERR "%s() stop transition failed, ret = 0x%x\n", 216 __func__, ret); 217 ret = -EIO; 218 } else { 219 dprintk(DBGLVL_VBI, "%s() Stopped\n", __func__); 220 ret = 0; 221 } 222 223 return ret; 224 } 225 226 static int saa7164_vbi_acquire_port(struct saa7164_port *port) 227 { 228 struct saa7164_dev *dev = port->dev; 229 int ret; 230 231 ret = saa7164_api_transition_port(port, SAA_DMASTATE_ACQUIRE); 232 if ((ret != SAA_OK) && (ret != SAA_ERR_ALREADY_STOPPED)) { 233 printk(KERN_ERR "%s() acquire transition failed, ret = 0x%x\n", 234 __func__, ret); 235 ret = -EIO; 236 } else { 237 dprintk(DBGLVL_VBI, "%s() Acquired\n", __func__); 238 ret = 0; 239 } 240 241 return ret; 242 } 243 244 static int saa7164_vbi_pause_port(struct saa7164_port *port) 245 { 246 struct saa7164_dev *dev = port->dev; 247 int ret; 248 249 ret = saa7164_api_transition_port(port, SAA_DMASTATE_PAUSE); 250 if ((ret != SAA_OK) && (ret != SAA_ERR_ALREADY_STOPPED)) { 251 printk(KERN_ERR "%s() pause transition failed, ret = 0x%x\n", 252 __func__, ret); 253 ret = -EIO; 254 } else { 255 dprintk(DBGLVL_VBI, "%s() Paused\n", __func__); 256 ret = 0; 257 } 258 259 return ret; 260 } 261 262 /* Firmware is very windows centric, meaning you have to transition 263 * the part through AVStream / KS Windows stages, forwards or backwards. 264 * States are: stopped, acquired (h/w), paused, started. 265 * We have to leave here will all of the soft buffers on the free list, 266 * else the cfg_post() func won't have soft buffers to correctly configure. 267 */ 268 static int saa7164_vbi_stop_streaming(struct saa7164_port *port) 269 { 270 struct saa7164_dev *dev = port->dev; 271 struct saa7164_buffer *buf; 272 struct saa7164_user_buffer *ubuf; 273 struct list_head *c, *n; 274 int ret; 275 276 dprintk(DBGLVL_VBI, "%s(port=%d)\n", __func__, port->nr); 277 278 ret = saa7164_vbi_pause_port(port); 279 ret = saa7164_vbi_acquire_port(port); 280 ret = saa7164_vbi_stop_port(port); 281 282 dprintk(DBGLVL_VBI, "%s(port=%d) Hardware stopped\n", __func__, 283 port->nr); 284 285 /* Reset the state of any allocated buffer resources */ 286 mutex_lock(&port->dmaqueue_lock); 287 288 /* Reset the hard and soft buffer state */ 289 list_for_each_safe(c, n, &port->dmaqueue.list) { 290 buf = list_entry(c, struct saa7164_buffer, list); 291 buf->flags = SAA7164_BUFFER_FREE; 292 buf->pos = 0; 293 } 294 295 list_for_each_safe(c, n, &port->list_buf_used.list) { 296 ubuf = list_entry(c, struct saa7164_user_buffer, list); 297 ubuf->pos = 0; 298 list_move_tail(&ubuf->list, &port->list_buf_free.list); 299 } 300 301 mutex_unlock(&port->dmaqueue_lock); 302 303 /* Free any allocated resources */ 304 saa7164_vbi_buffers_dealloc(port); 305 306 dprintk(DBGLVL_VBI, "%s(port=%d) Released\n", __func__, port->nr); 307 308 return ret; 309 } 310 311 static int saa7164_vbi_start_streaming(struct saa7164_port *port) 312 { 313 struct saa7164_dev *dev = port->dev; 314 int result, ret = 0; 315 316 dprintk(DBGLVL_VBI, "%s(port=%d)\n", __func__, port->nr); 317 318 port->done_first_interrupt = 0; 319 320 /* allocate all of the PCIe DMA buffer resources on the fly, 321 * allowing switching between TS and PS payloads without 322 * requiring a complete driver reload. 323 */ 324 saa7164_vbi_buffers_alloc(port); 325 326 /* Configure the encoder with any cache values */ 327 #if 0 328 saa7164_api_set_encoder(port); 329 saa7164_api_get_encoder(port); 330 #endif 331 332 /* Place the empty buffers on the hardware */ 333 saa7164_buffer_cfg_port(port); 334 335 /* Negotiate format */ 336 if (saa7164_api_set_vbi_format(port) != SAA_OK) { 337 printk(KERN_ERR "%s() No supported VBI format\n", __func__); 338 ret = -EIO; 339 goto out; 340 } 341 342 /* Acquire the hardware */ 343 result = saa7164_api_transition_port(port, SAA_DMASTATE_ACQUIRE); 344 if ((result != SAA_OK) && (result != SAA_ERR_ALREADY_STOPPED)) { 345 printk(KERN_ERR "%s() acquire transition failed, res = 0x%x\n", 346 __func__, result); 347 348 ret = -EIO; 349 goto out; 350 } else 351 dprintk(DBGLVL_VBI, "%s() Acquired\n", __func__); 352 353 /* Pause the hardware */ 354 result = saa7164_api_transition_port(port, SAA_DMASTATE_PAUSE); 355 if ((result != SAA_OK) && (result != SAA_ERR_ALREADY_STOPPED)) { 356 printk(KERN_ERR "%s() pause transition failed, res = 0x%x\n", 357 __func__, result); 358 359 /* Stop the hardware, regardless */ 360 result = saa7164_vbi_stop_port(port); 361 if (result != SAA_OK) { 362 printk(KERN_ERR "%s() pause/forced stop transition failed, res = 0x%x\n", 363 __func__, result); 364 } 365 366 ret = -EIO; 367 goto out; 368 } else 369 dprintk(DBGLVL_VBI, "%s() Paused\n", __func__); 370 371 /* Start the hardware */ 372 result = saa7164_api_transition_port(port, SAA_DMASTATE_RUN); 373 if ((result != SAA_OK) && (result != SAA_ERR_ALREADY_STOPPED)) { 374 printk(KERN_ERR "%s() run transition failed, result = 0x%x\n", 375 __func__, result); 376 377 /* Stop the hardware, regardless */ 378 result = saa7164_vbi_acquire_port(port); 379 result = saa7164_vbi_stop_port(port); 380 if (result != SAA_OK) { 381 printk(KERN_ERR "%s() run/forced stop transition failed, res = 0x%x\n", 382 __func__, result); 383 } 384 385 ret = -EIO; 386 } else 387 dprintk(DBGLVL_VBI, "%s() Running\n", __func__); 388 389 out: 390 return ret; 391 } 392 393 static int saa7164_vbi_fmt(struct file *file, void *priv, 394 struct v4l2_format *f) 395 { 396 /* ntsc */ 397 f->fmt.vbi.samples_per_line = 1440; 398 f->fmt.vbi.sampling_rate = 27000000; 399 f->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY; 400 f->fmt.vbi.offset = 0; 401 f->fmt.vbi.flags = 0; 402 f->fmt.vbi.start[0] = 10; 403 f->fmt.vbi.count[0] = 18; 404 f->fmt.vbi.start[1] = 263 + 10 + 1; 405 f->fmt.vbi.count[1] = 18; 406 memset(f->fmt.vbi.reserved, 0, sizeof(f->fmt.vbi.reserved)); 407 return 0; 408 } 409 410 static int fops_open(struct file *file) 411 { 412 struct saa7164_dev *dev; 413 struct saa7164_port *port; 414 struct saa7164_vbi_fh *fh; 415 416 port = (struct saa7164_port *)video_get_drvdata(video_devdata(file)); 417 if (!port) 418 return -ENODEV; 419 420 dev = port->dev; 421 422 dprintk(DBGLVL_VBI, "%s()\n", __func__); 423 424 /* allocate + initialize per filehandle data */ 425 fh = kzalloc(sizeof(*fh), GFP_KERNEL); 426 if (NULL == fh) 427 return -ENOMEM; 428 429 fh->port = port; 430 v4l2_fh_init(&fh->fh, video_devdata(file)); 431 v4l2_fh_add(&fh->fh); 432 file->private_data = fh; 433 434 return 0; 435 } 436 437 static int fops_release(struct file *file) 438 { 439 struct saa7164_vbi_fh *fh = file->private_data; 440 struct saa7164_port *port = fh->port; 441 struct saa7164_dev *dev = port->dev; 442 443 dprintk(DBGLVL_VBI, "%s()\n", __func__); 444 445 /* Shut device down on last close */ 446 if (atomic_cmpxchg(&fh->v4l_reading, 1, 0) == 1) { 447 if (atomic_dec_return(&port->v4l_reader_count) == 0) { 448 /* stop vbi capture then cancel buffers */ 449 saa7164_vbi_stop_streaming(port); 450 } 451 } 452 453 v4l2_fh_del(&fh->fh); 454 v4l2_fh_exit(&fh->fh); 455 kfree(fh); 456 457 return 0; 458 } 459 460 static struct 461 saa7164_user_buffer *saa7164_vbi_next_buf(struct saa7164_port *port) 462 { 463 struct saa7164_user_buffer *ubuf = NULL; 464 struct saa7164_dev *dev = port->dev; 465 u32 crc; 466 467 mutex_lock(&port->dmaqueue_lock); 468 if (!list_empty(&port->list_buf_used.list)) { 469 ubuf = list_first_entry(&port->list_buf_used.list, 470 struct saa7164_user_buffer, list); 471 472 if (crc_checking) { 473 crc = crc32(0, ubuf->data, ubuf->actual_size); 474 if (crc != ubuf->crc) { 475 printk(KERN_ERR "%s() ubuf %p crc became invalid, was 0x%x became 0x%x\n", 476 __func__, 477 ubuf, ubuf->crc, crc); 478 } 479 } 480 481 } 482 mutex_unlock(&port->dmaqueue_lock); 483 484 dprintk(DBGLVL_VBI, "%s() returns %p\n", __func__, ubuf); 485 486 return ubuf; 487 } 488 489 static ssize_t fops_read(struct file *file, char __user *buffer, 490 size_t count, loff_t *pos) 491 { 492 struct saa7164_vbi_fh *fh = file->private_data; 493 struct saa7164_port *port = fh->port; 494 struct saa7164_user_buffer *ubuf = NULL; 495 struct saa7164_dev *dev = port->dev; 496 int ret = 0; 497 int rem, cnt; 498 u8 *p; 499 500 port->last_read_msecs_diff = port->last_read_msecs; 501 port->last_read_msecs = jiffies_to_msecs(jiffies); 502 port->last_read_msecs_diff = port->last_read_msecs - 503 port->last_read_msecs_diff; 504 505 saa7164_histogram_update(&port->read_interval, 506 port->last_read_msecs_diff); 507 508 if (*pos) { 509 printk(KERN_ERR "%s() ESPIPE\n", __func__); 510 return -ESPIPE; 511 } 512 513 if (atomic_cmpxchg(&fh->v4l_reading, 0, 1) == 0) { 514 if (atomic_inc_return(&port->v4l_reader_count) == 1) { 515 516 if (saa7164_vbi_initialize(port) < 0) { 517 printk(KERN_ERR "%s() EINVAL\n", __func__); 518 return -EINVAL; 519 } 520 521 saa7164_vbi_start_streaming(port); 522 msleep(200); 523 } 524 } 525 526 /* blocking wait for buffer */ 527 if ((file->f_flags & O_NONBLOCK) == 0) { 528 if (wait_event_interruptible(port->wait_read, 529 saa7164_vbi_next_buf(port))) { 530 printk(KERN_ERR "%s() ERESTARTSYS\n", __func__); 531 return -ERESTARTSYS; 532 } 533 } 534 535 /* Pull the first buffer from the used list */ 536 ubuf = saa7164_vbi_next_buf(port); 537 538 while ((count > 0) && ubuf) { 539 540 /* set remaining bytes to copy */ 541 rem = ubuf->actual_size - ubuf->pos; 542 cnt = rem > count ? count : rem; 543 544 p = ubuf->data + ubuf->pos; 545 546 dprintk(DBGLVL_VBI, 547 "%s() count=%d cnt=%d rem=%d buf=%p buf->pos=%d\n", 548 __func__, (int)count, cnt, rem, ubuf, ubuf->pos); 549 550 if (copy_to_user(buffer, p, cnt)) { 551 printk(KERN_ERR "%s() copy_to_user failed\n", __func__); 552 if (!ret) { 553 printk(KERN_ERR "%s() EFAULT\n", __func__); 554 ret = -EFAULT; 555 } 556 goto err; 557 } 558 559 ubuf->pos += cnt; 560 count -= cnt; 561 buffer += cnt; 562 ret += cnt; 563 564 if (ubuf->pos > ubuf->actual_size) 565 printk(KERN_ERR "read() pos > actual, huh?\n"); 566 567 if (ubuf->pos == ubuf->actual_size) { 568 569 /* finished with current buffer, take next buffer */ 570 571 /* Requeue the buffer on the free list */ 572 ubuf->pos = 0; 573 574 mutex_lock(&port->dmaqueue_lock); 575 list_move_tail(&ubuf->list, &port->list_buf_free.list); 576 mutex_unlock(&port->dmaqueue_lock); 577 578 /* Dequeue next */ 579 if ((file->f_flags & O_NONBLOCK) == 0) { 580 if (wait_event_interruptible(port->wait_read, 581 saa7164_vbi_next_buf(port))) { 582 break; 583 } 584 } 585 ubuf = saa7164_vbi_next_buf(port); 586 } 587 } 588 err: 589 if (!ret && !ubuf) { 590 printk(KERN_ERR "%s() EAGAIN\n", __func__); 591 ret = -EAGAIN; 592 } 593 594 return ret; 595 } 596 597 static __poll_t fops_poll(struct file *file, poll_table *wait) 598 { 599 struct saa7164_vbi_fh *fh = (struct saa7164_vbi_fh *)file->private_data; 600 struct saa7164_port *port = fh->port; 601 __poll_t mask = 0; 602 603 port->last_poll_msecs_diff = port->last_poll_msecs; 604 port->last_poll_msecs = jiffies_to_msecs(jiffies); 605 port->last_poll_msecs_diff = port->last_poll_msecs - 606 port->last_poll_msecs_diff; 607 608 saa7164_histogram_update(&port->poll_interval, 609 port->last_poll_msecs_diff); 610 611 if (!video_is_registered(port->v4l_device)) 612 return EPOLLERR; 613 614 if (atomic_cmpxchg(&fh->v4l_reading, 0, 1) == 0) { 615 if (atomic_inc_return(&port->v4l_reader_count) == 1) { 616 if (saa7164_vbi_initialize(port) < 0) 617 return EPOLLERR; 618 saa7164_vbi_start_streaming(port); 619 msleep(200); 620 } 621 } 622 623 /* blocking wait for buffer */ 624 if ((file->f_flags & O_NONBLOCK) == 0) { 625 if (wait_event_interruptible(port->wait_read, 626 saa7164_vbi_next_buf(port))) { 627 return EPOLLERR; 628 } 629 } 630 631 /* Pull the first buffer from the used list */ 632 if (!list_empty(&port->list_buf_used.list)) 633 mask |= EPOLLIN | EPOLLRDNORM; 634 635 return mask; 636 } 637 static const struct v4l2_file_operations vbi_fops = { 638 .owner = THIS_MODULE, 639 .open = fops_open, 640 .release = fops_release, 641 .read = fops_read, 642 .poll = fops_poll, 643 .unlocked_ioctl = video_ioctl2, 644 }; 645 646 static const struct v4l2_ioctl_ops vbi_ioctl_ops = { 647 .vidioc_s_std = vidioc_s_std, 648 .vidioc_g_std = vidioc_g_std, 649 .vidioc_enum_input = saa7164_enum_input, 650 .vidioc_g_input = vidioc_g_input, 651 .vidioc_s_input = vidioc_s_input, 652 .vidioc_g_tuner = saa7164_g_tuner, 653 .vidioc_s_tuner = saa7164_s_tuner, 654 .vidioc_g_frequency = vidioc_g_frequency, 655 .vidioc_s_frequency = vidioc_s_frequency, 656 .vidioc_querycap = vidioc_querycap, 657 .vidioc_g_fmt_vbi_cap = saa7164_vbi_fmt, 658 .vidioc_try_fmt_vbi_cap = saa7164_vbi_fmt, 659 .vidioc_s_fmt_vbi_cap = saa7164_vbi_fmt, 660 }; 661 662 static struct video_device saa7164_vbi_template = { 663 .name = "saa7164", 664 .fops = &vbi_fops, 665 .ioctl_ops = &vbi_ioctl_ops, 666 .minor = -1, 667 .tvnorms = SAA7164_NORMS, 668 .device_caps = V4L2_CAP_VBI_CAPTURE | V4L2_CAP_READWRITE | 669 V4L2_CAP_TUNER, 670 }; 671 672 static struct video_device *saa7164_vbi_alloc( 673 struct saa7164_port *port, 674 struct pci_dev *pci, 675 struct video_device *template, 676 char *type) 677 { 678 struct video_device *vfd; 679 struct saa7164_dev *dev = port->dev; 680 681 dprintk(DBGLVL_VBI, "%s()\n", __func__); 682 683 vfd = video_device_alloc(); 684 if (NULL == vfd) 685 return NULL; 686 687 *vfd = *template; 688 snprintf(vfd->name, sizeof(vfd->name), "%s %s (%s)", dev->name, 689 type, saa7164_boards[dev->board].name); 690 691 vfd->v4l2_dev = &dev->v4l2_dev; 692 vfd->release = video_device_release; 693 return vfd; 694 } 695 696 int saa7164_vbi_register(struct saa7164_port *port) 697 { 698 struct saa7164_dev *dev = port->dev; 699 int result = -ENODEV; 700 701 dprintk(DBGLVL_VBI, "%s()\n", __func__); 702 703 BUG_ON(port->type != SAA7164_MPEG_VBI); 704 705 /* Sanity check that the PCI configuration space is active */ 706 if (port->hwcfg.BARLocation == 0) { 707 printk(KERN_ERR "%s() failed (errno = %d), NO PCI configuration\n", 708 __func__, result); 709 result = -ENOMEM; 710 goto failed; 711 } 712 713 /* Establish VBI defaults here */ 714 715 /* Allocate and register the video device node */ 716 port->v4l_device = saa7164_vbi_alloc(port, 717 dev->pci, &saa7164_vbi_template, "vbi"); 718 719 if (!port->v4l_device) { 720 printk(KERN_INFO "%s: can't allocate vbi device\n", 721 dev->name); 722 result = -ENOMEM; 723 goto failed; 724 } 725 726 port->enc_port = &dev->ports[port->nr - 2]; 727 video_set_drvdata(port->v4l_device, port); 728 result = video_register_device(port->v4l_device, 729 VFL_TYPE_VBI, -1); 730 if (result < 0) { 731 printk(KERN_INFO "%s: can't register vbi device\n", 732 dev->name); 733 /* TODO: We're going to leak here if we don't dealloc 734 The buffers above. The unreg function can't deal wit it. 735 */ 736 goto failed; 737 } 738 739 printk(KERN_INFO "%s: registered device vbi%d [vbi]\n", 740 dev->name, port->v4l_device->num); 741 742 /* Configure the hardware defaults */ 743 744 result = 0; 745 failed: 746 return result; 747 } 748 749 void saa7164_vbi_unregister(struct saa7164_port *port) 750 { 751 struct saa7164_dev *dev = port->dev; 752 753 dprintk(DBGLVL_VBI, "%s(port=%d)\n", __func__, port->nr); 754 755 BUG_ON(port->type != SAA7164_MPEG_VBI); 756 757 if (port->v4l_device) { 758 if (port->v4l_device->minor != -1) 759 video_unregister_device(port->v4l_device); 760 else 761 video_device_release(port->v4l_device); 762 763 port->v4l_device = NULL; 764 } 765 766 } 767