1 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 2 3 #include <media/drv-intf/saa7146_vv.h> 4 #include <media/v4l2-event.h> 5 #include <media/v4l2-ctrls.h> 6 #include <linux/module.h> 7 8 static int max_memory = 32; 9 10 module_param(max_memory, int, 0644); 11 MODULE_PARM_DESC(max_memory, "maximum memory usage for capture buffers (default: 32Mb)"); 12 13 #define IS_CAPTURE_ACTIVE(fh) \ 14 (((vv->video_status & STATUS_CAPTURE) != 0) && (vv->video_fh == fh)) 15 16 #define IS_OVERLAY_ACTIVE(fh) \ 17 (((vv->video_status & STATUS_OVERLAY) != 0) && (vv->video_fh == fh)) 18 19 /* format descriptions for capture and preview */ 20 static struct saa7146_format formats[] = { 21 { 22 .name = "RGB-8 (3-3-2)", 23 .pixelformat = V4L2_PIX_FMT_RGB332, 24 .trans = RGB08_COMPOSED, 25 .depth = 8, 26 .flags = 0, 27 }, { 28 .name = "RGB-16 (5/B-6/G-5/R)", 29 .pixelformat = V4L2_PIX_FMT_RGB565, 30 .trans = RGB16_COMPOSED, 31 .depth = 16, 32 .flags = 0, 33 }, { 34 .name = "RGB-24 (B-G-R)", 35 .pixelformat = V4L2_PIX_FMT_BGR24, 36 .trans = RGB24_COMPOSED, 37 .depth = 24, 38 .flags = 0, 39 }, { 40 .name = "RGB-32 (B-G-R)", 41 .pixelformat = V4L2_PIX_FMT_BGR32, 42 .trans = RGB32_COMPOSED, 43 .depth = 32, 44 .flags = 0, 45 }, { 46 .name = "RGB-32 (R-G-B)", 47 .pixelformat = V4L2_PIX_FMT_RGB32, 48 .trans = RGB32_COMPOSED, 49 .depth = 32, 50 .flags = 0, 51 .swap = 0x2, 52 }, { 53 .name = "Greyscale-8", 54 .pixelformat = V4L2_PIX_FMT_GREY, 55 .trans = Y8, 56 .depth = 8, 57 .flags = 0, 58 }, { 59 .name = "YUV 4:2:2 planar (Y-Cb-Cr)", 60 .pixelformat = V4L2_PIX_FMT_YUV422P, 61 .trans = YUV422_DECOMPOSED, 62 .depth = 16, 63 .flags = FORMAT_BYTE_SWAP|FORMAT_IS_PLANAR, 64 }, { 65 .name = "YVU 4:2:0 planar (Y-Cb-Cr)", 66 .pixelformat = V4L2_PIX_FMT_YVU420, 67 .trans = YUV420_DECOMPOSED, 68 .depth = 12, 69 .flags = FORMAT_BYTE_SWAP|FORMAT_IS_PLANAR, 70 }, { 71 .name = "YUV 4:2:0 planar (Y-Cb-Cr)", 72 .pixelformat = V4L2_PIX_FMT_YUV420, 73 .trans = YUV420_DECOMPOSED, 74 .depth = 12, 75 .flags = FORMAT_IS_PLANAR, 76 }, { 77 .name = "YUV 4:2:2 (U-Y-V-Y)", 78 .pixelformat = V4L2_PIX_FMT_UYVY, 79 .trans = YUV422_COMPOSED, 80 .depth = 16, 81 .flags = 0, 82 } 83 }; 84 85 /* unfortunately, the saa7146 contains a bug which prevents it from doing on-the-fly byte swaps. 86 due to this, it's impossible to provide additional *packed* formats, which are simply byte swapped 87 (like V4L2_PIX_FMT_YUYV) ... 8-( */ 88 89 static int NUM_FORMATS = sizeof(formats)/sizeof(struct saa7146_format); 90 91 struct saa7146_format* saa7146_format_by_fourcc(struct saa7146_dev *dev, int fourcc) 92 { 93 int i, j = NUM_FORMATS; 94 95 for (i = 0; i < j; i++) { 96 if (formats[i].pixelformat == fourcc) { 97 return formats+i; 98 } 99 } 100 101 DEB_D("unknown pixelformat:'%4.4s'\n", (char *)&fourcc); 102 return NULL; 103 } 104 105 static int vidioc_try_fmt_vid_overlay(struct file *file, void *fh, struct v4l2_format *f); 106 107 int saa7146_start_preview(struct saa7146_fh *fh) 108 { 109 struct saa7146_dev *dev = fh->dev; 110 struct saa7146_vv *vv = dev->vv_data; 111 struct v4l2_format fmt; 112 int ret = 0, err = 0; 113 114 DEB_EE("dev:%p, fh:%p\n", dev, fh); 115 116 /* check if we have overlay information */ 117 if (vv->ov.fh == NULL) { 118 DEB_D("no overlay data available. try S_FMT first.\n"); 119 return -EAGAIN; 120 } 121 122 /* check if streaming capture is running */ 123 if (IS_CAPTURE_ACTIVE(fh) != 0) { 124 DEB_D("streaming capture is active\n"); 125 return -EBUSY; 126 } 127 128 /* check if overlay is running */ 129 if (IS_OVERLAY_ACTIVE(fh) != 0) { 130 if (vv->video_fh == fh) { 131 DEB_D("overlay is already active\n"); 132 return 0; 133 } 134 DEB_D("overlay is already active in another open\n"); 135 return -EBUSY; 136 } 137 138 if (0 == saa7146_res_get(fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP)) { 139 DEB_D("cannot get necessary overlay resources\n"); 140 return -EBUSY; 141 } 142 143 fmt.fmt.win = vv->ov.win; 144 err = vidioc_try_fmt_vid_overlay(NULL, fh, &fmt); 145 if (0 != err) { 146 saa7146_res_free(vv->video_fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP); 147 return -EBUSY; 148 } 149 vv->ov.win = fmt.fmt.win; 150 151 DEB_D("%dx%d+%d+%d %s field=%s\n", 152 vv->ov.win.w.width, vv->ov.win.w.height, 153 vv->ov.win.w.left, vv->ov.win.w.top, 154 vv->ov_fmt->name, v4l2_field_names[vv->ov.win.field]); 155 156 if (0 != (ret = saa7146_enable_overlay(fh))) { 157 DEB_D("enabling overlay failed: %d\n", ret); 158 saa7146_res_free(vv->video_fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP); 159 return ret; 160 } 161 162 vv->video_status = STATUS_OVERLAY; 163 vv->video_fh = fh; 164 165 return 0; 166 } 167 EXPORT_SYMBOL_GPL(saa7146_start_preview); 168 169 int saa7146_stop_preview(struct saa7146_fh *fh) 170 { 171 struct saa7146_dev *dev = fh->dev; 172 struct saa7146_vv *vv = dev->vv_data; 173 174 DEB_EE("dev:%p, fh:%p\n", dev, fh); 175 176 /* check if streaming capture is running */ 177 if (IS_CAPTURE_ACTIVE(fh) != 0) { 178 DEB_D("streaming capture is active\n"); 179 return -EBUSY; 180 } 181 182 /* check if overlay is running at all */ 183 if ((vv->video_status & STATUS_OVERLAY) == 0) { 184 DEB_D("no active overlay\n"); 185 return 0; 186 } 187 188 if (vv->video_fh != fh) { 189 DEB_D("overlay is active, but in another open\n"); 190 return -EBUSY; 191 } 192 193 vv->video_status = 0; 194 vv->video_fh = NULL; 195 196 saa7146_disable_overlay(fh); 197 198 saa7146_res_free(fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP); 199 200 return 0; 201 } 202 EXPORT_SYMBOL_GPL(saa7146_stop_preview); 203 204 /********************************************************************************/ 205 /* common pagetable functions */ 206 207 static int saa7146_pgtable_build(struct saa7146_dev *dev, struct saa7146_buf *buf) 208 { 209 struct pci_dev *pci = dev->pci; 210 struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb); 211 struct scatterlist *list = dma->sglist; 212 int length = dma->sglen; 213 struct saa7146_format *sfmt = saa7146_format_by_fourcc(dev,buf->fmt->pixelformat); 214 215 DEB_EE("dev:%p, buf:%p, sg_len:%d\n", dev, buf, length); 216 217 if( 0 != IS_PLANAR(sfmt->trans)) { 218 struct saa7146_pgtable *pt1 = &buf->pt[0]; 219 struct saa7146_pgtable *pt2 = &buf->pt[1]; 220 struct saa7146_pgtable *pt3 = &buf->pt[2]; 221 __le32 *ptr1, *ptr2, *ptr3; 222 __le32 fill; 223 224 int size = buf->fmt->width*buf->fmt->height; 225 int i,p,m1,m2,m3,o1,o2; 226 227 switch( sfmt->depth ) { 228 case 12: { 229 /* create some offsets inside the page table */ 230 m1 = ((size+PAGE_SIZE)/PAGE_SIZE)-1; 231 m2 = ((size+(size/4)+PAGE_SIZE)/PAGE_SIZE)-1; 232 m3 = ((size+(size/2)+PAGE_SIZE)/PAGE_SIZE)-1; 233 o1 = size%PAGE_SIZE; 234 o2 = (size+(size/4))%PAGE_SIZE; 235 DEB_CAP("size:%d, m1:%d, m2:%d, m3:%d, o1:%d, o2:%d\n", 236 size, m1, m2, m3, o1, o2); 237 break; 238 } 239 case 16: { 240 /* create some offsets inside the page table */ 241 m1 = ((size+PAGE_SIZE)/PAGE_SIZE)-1; 242 m2 = ((size+(size/2)+PAGE_SIZE)/PAGE_SIZE)-1; 243 m3 = ((2*size+PAGE_SIZE)/PAGE_SIZE)-1; 244 o1 = size%PAGE_SIZE; 245 o2 = (size+(size/2))%PAGE_SIZE; 246 DEB_CAP("size:%d, m1:%d, m2:%d, m3:%d, o1:%d, o2:%d\n", 247 size, m1, m2, m3, o1, o2); 248 break; 249 } 250 default: { 251 return -1; 252 } 253 } 254 255 ptr1 = pt1->cpu; 256 ptr2 = pt2->cpu; 257 ptr3 = pt3->cpu; 258 259 /* walk all pages, copy all page addresses to ptr1 */ 260 for (i = 0; i < length; i++, list++) { 261 for (p = 0; p * 4096 < list->length; p++, ptr1++) { 262 *ptr1 = cpu_to_le32(sg_dma_address(list) - list->offset); 263 } 264 } 265 /* 266 ptr1 = pt1->cpu; 267 for(j=0;j<40;j++) { 268 printk("ptr1 %d: 0x%08x\n",j,ptr1[j]); 269 } 270 */ 271 272 /* if we have a user buffer, the first page may not be 273 aligned to a page boundary. */ 274 pt1->offset = dma->sglist->offset; 275 pt2->offset = pt1->offset+o1; 276 pt3->offset = pt1->offset+o2; 277 278 /* create video-dma2 page table */ 279 ptr1 = pt1->cpu; 280 for(i = m1; i <= m2 ; i++, ptr2++) { 281 *ptr2 = ptr1[i]; 282 } 283 fill = *(ptr2-1); 284 for(;i<1024;i++,ptr2++) { 285 *ptr2 = fill; 286 } 287 /* create video-dma3 page table */ 288 ptr1 = pt1->cpu; 289 for(i = m2; i <= m3; i++,ptr3++) { 290 *ptr3 = ptr1[i]; 291 } 292 fill = *(ptr3-1); 293 for(;i<1024;i++,ptr3++) { 294 *ptr3 = fill; 295 } 296 /* finally: finish up video-dma1 page table */ 297 ptr1 = pt1->cpu+m1; 298 fill = pt1->cpu[m1]; 299 for(i=m1;i<1024;i++,ptr1++) { 300 *ptr1 = fill; 301 } 302 /* 303 ptr1 = pt1->cpu; 304 ptr2 = pt2->cpu; 305 ptr3 = pt3->cpu; 306 for(j=0;j<40;j++) { 307 printk("ptr1 %d: 0x%08x\n",j,ptr1[j]); 308 } 309 for(j=0;j<40;j++) { 310 printk("ptr2 %d: 0x%08x\n",j,ptr2[j]); 311 } 312 for(j=0;j<40;j++) { 313 printk("ptr3 %d: 0x%08x\n",j,ptr3[j]); 314 } 315 */ 316 } else { 317 struct saa7146_pgtable *pt = &buf->pt[0]; 318 return saa7146_pgtable_build_single(pci, pt, list, length); 319 } 320 321 return 0; 322 } 323 324 325 /********************************************************************************/ 326 /* file operations */ 327 328 static int video_begin(struct saa7146_fh *fh) 329 { 330 struct saa7146_dev *dev = fh->dev; 331 struct saa7146_vv *vv = dev->vv_data; 332 struct saa7146_format *fmt = NULL; 333 unsigned int resource; 334 int ret = 0, err = 0; 335 336 DEB_EE("dev:%p, fh:%p\n", dev, fh); 337 338 if ((vv->video_status & STATUS_CAPTURE) != 0) { 339 if (vv->video_fh == fh) { 340 DEB_S("already capturing\n"); 341 return 0; 342 } 343 DEB_S("already capturing in another open\n"); 344 return -EBUSY; 345 } 346 347 if ((vv->video_status & STATUS_OVERLAY) != 0) { 348 DEB_S("warning: suspending overlay video for streaming capture\n"); 349 vv->ov_suspend = vv->video_fh; 350 err = saa7146_stop_preview(vv->video_fh); /* side effect: video_status is now 0, video_fh is NULL */ 351 if (0 != err) { 352 DEB_D("suspending video failed. aborting\n"); 353 return err; 354 } 355 } 356 357 fmt = saa7146_format_by_fourcc(dev, vv->video_fmt.pixelformat); 358 /* we need to have a valid format set here */ 359 BUG_ON(NULL == fmt); 360 361 if (0 != (fmt->flags & FORMAT_IS_PLANAR)) { 362 resource = RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP|RESOURCE_DMA3_BRS; 363 } else { 364 resource = RESOURCE_DMA1_HPS; 365 } 366 367 ret = saa7146_res_get(fh, resource); 368 if (0 == ret) { 369 DEB_S("cannot get capture resource %d\n", resource); 370 if (vv->ov_suspend != NULL) { 371 saa7146_start_preview(vv->ov_suspend); 372 vv->ov_suspend = NULL; 373 } 374 return -EBUSY; 375 } 376 377 /* clear out beginning of streaming bit (rps register 0)*/ 378 saa7146_write(dev, MC2, MASK_27 ); 379 380 /* enable rps0 irqs */ 381 SAA7146_IER_ENABLE(dev, MASK_27); 382 383 vv->video_fh = fh; 384 vv->video_status = STATUS_CAPTURE; 385 386 return 0; 387 } 388 389 static int video_end(struct saa7146_fh *fh, struct file *file) 390 { 391 struct saa7146_dev *dev = fh->dev; 392 struct saa7146_vv *vv = dev->vv_data; 393 struct saa7146_dmaqueue *q = &vv->video_dmaq; 394 struct saa7146_format *fmt = NULL; 395 unsigned long flags; 396 unsigned int resource; 397 u32 dmas = 0; 398 DEB_EE("dev:%p, fh:%p\n", dev, fh); 399 400 if ((vv->video_status & STATUS_CAPTURE) != STATUS_CAPTURE) { 401 DEB_S("not capturing\n"); 402 return 0; 403 } 404 405 if (vv->video_fh != fh) { 406 DEB_S("capturing, but in another open\n"); 407 return -EBUSY; 408 } 409 410 fmt = saa7146_format_by_fourcc(dev, vv->video_fmt.pixelformat); 411 /* we need to have a valid format set here */ 412 BUG_ON(NULL == fmt); 413 414 if (0 != (fmt->flags & FORMAT_IS_PLANAR)) { 415 resource = RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP|RESOURCE_DMA3_BRS; 416 dmas = MASK_22 | MASK_21 | MASK_20; 417 } else { 418 resource = RESOURCE_DMA1_HPS; 419 dmas = MASK_22; 420 } 421 spin_lock_irqsave(&dev->slock,flags); 422 423 /* disable rps0 */ 424 saa7146_write(dev, MC1, MASK_28); 425 426 /* disable rps0 irqs */ 427 SAA7146_IER_DISABLE(dev, MASK_27); 428 429 /* shut down all used video dma transfers */ 430 saa7146_write(dev, MC1, dmas); 431 432 if (q->curr) 433 saa7146_buffer_finish(dev, q, VIDEOBUF_DONE); 434 435 spin_unlock_irqrestore(&dev->slock, flags); 436 437 vv->video_fh = NULL; 438 vv->video_status = 0; 439 440 saa7146_res_free(fh, resource); 441 442 if (vv->ov_suspend != NULL) { 443 saa7146_start_preview(vv->ov_suspend); 444 vv->ov_suspend = NULL; 445 } 446 447 return 0; 448 } 449 450 static int vidioc_querycap(struct file *file, void *fh, struct v4l2_capability *cap) 451 { 452 struct video_device *vdev = video_devdata(file); 453 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev; 454 455 strcpy((char *)cap->driver, "saa7146 v4l2"); 456 strlcpy((char *)cap->card, dev->ext->name, sizeof(cap->card)); 457 sprintf((char *)cap->bus_info, "PCI:%s", pci_name(dev->pci)); 458 cap->device_caps = 459 V4L2_CAP_VIDEO_CAPTURE | 460 V4L2_CAP_VIDEO_OVERLAY | 461 V4L2_CAP_READWRITE | 462 V4L2_CAP_STREAMING; 463 cap->device_caps |= dev->ext_vv_data->capabilities; 464 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS; 465 if (vdev->vfl_type == VFL_TYPE_GRABBER) 466 cap->device_caps &= 467 ~(V4L2_CAP_VBI_CAPTURE | V4L2_CAP_SLICED_VBI_OUTPUT); 468 else 469 cap->device_caps &= 470 ~(V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OVERLAY | V4L2_CAP_AUDIO); 471 return 0; 472 } 473 474 static int vidioc_g_fbuf(struct file *file, void *fh, struct v4l2_framebuffer *fb) 475 { 476 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev; 477 struct saa7146_vv *vv = dev->vv_data; 478 479 *fb = vv->ov_fb; 480 fb->capability = V4L2_FBUF_CAP_LIST_CLIPPING; 481 fb->flags = V4L2_FBUF_FLAG_PRIMARY; 482 return 0; 483 } 484 485 static int vidioc_s_fbuf(struct file *file, void *fh, const struct v4l2_framebuffer *fb) 486 { 487 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev; 488 struct saa7146_vv *vv = dev->vv_data; 489 struct saa7146_format *fmt; 490 491 DEB_EE("VIDIOC_S_FBUF\n"); 492 493 if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO)) 494 return -EPERM; 495 496 /* check args */ 497 fmt = saa7146_format_by_fourcc(dev, fb->fmt.pixelformat); 498 if (NULL == fmt) 499 return -EINVAL; 500 501 /* planar formats are not allowed for overlay video, clipping and video dma would clash */ 502 if (fmt->flags & FORMAT_IS_PLANAR) 503 DEB_S("planar pixelformat '%4.4s' not allowed for overlay\n", 504 (char *)&fmt->pixelformat); 505 506 /* check if overlay is running */ 507 if (IS_OVERLAY_ACTIVE(fh) != 0) { 508 if (vv->video_fh != fh) { 509 DEB_D("refusing to change framebuffer information while overlay is active in another open\n"); 510 return -EBUSY; 511 } 512 } 513 514 /* ok, accept it */ 515 vv->ov_fb = *fb; 516 vv->ov_fmt = fmt; 517 518 if (vv->ov_fb.fmt.bytesperline < vv->ov_fb.fmt.width) { 519 vv->ov_fb.fmt.bytesperline = vv->ov_fb.fmt.width * fmt->depth / 8; 520 DEB_D("setting bytesperline to %d\n", vv->ov_fb.fmt.bytesperline); 521 } 522 return 0; 523 } 524 525 static int vidioc_enum_fmt_vid_cap(struct file *file, void *fh, struct v4l2_fmtdesc *f) 526 { 527 if (f->index >= NUM_FORMATS) 528 return -EINVAL; 529 strlcpy((char *)f->description, formats[f->index].name, 530 sizeof(f->description)); 531 f->pixelformat = formats[f->index].pixelformat; 532 return 0; 533 } 534 535 int saa7146_s_ctrl(struct v4l2_ctrl *ctrl) 536 { 537 struct saa7146_dev *dev = container_of(ctrl->handler, 538 struct saa7146_dev, ctrl_handler); 539 struct saa7146_vv *vv = dev->vv_data; 540 u32 val; 541 542 switch (ctrl->id) { 543 case V4L2_CID_BRIGHTNESS: 544 val = saa7146_read(dev, BCS_CTRL); 545 val &= 0x00ffffff; 546 val |= (ctrl->val << 24); 547 saa7146_write(dev, BCS_CTRL, val); 548 saa7146_write(dev, MC2, MASK_22 | MASK_06); 549 break; 550 551 case V4L2_CID_CONTRAST: 552 val = saa7146_read(dev, BCS_CTRL); 553 val &= 0xff00ffff; 554 val |= (ctrl->val << 16); 555 saa7146_write(dev, BCS_CTRL, val); 556 saa7146_write(dev, MC2, MASK_22 | MASK_06); 557 break; 558 559 case V4L2_CID_SATURATION: 560 val = saa7146_read(dev, BCS_CTRL); 561 val &= 0xffffff00; 562 val |= (ctrl->val << 0); 563 saa7146_write(dev, BCS_CTRL, val); 564 saa7146_write(dev, MC2, MASK_22 | MASK_06); 565 break; 566 567 case V4L2_CID_HFLIP: 568 /* fixme: we can support changing VFLIP and HFLIP here... */ 569 if ((vv->video_status & STATUS_CAPTURE)) 570 return -EBUSY; 571 vv->hflip = ctrl->val; 572 break; 573 574 case V4L2_CID_VFLIP: 575 if ((vv->video_status & STATUS_CAPTURE)) 576 return -EBUSY; 577 vv->vflip = ctrl->val; 578 break; 579 580 default: 581 return -EINVAL; 582 } 583 584 if ((vv->video_status & STATUS_OVERLAY) != 0) { /* CHECK: && (vv->video_fh == fh)) */ 585 struct saa7146_fh *fh = vv->video_fh; 586 587 saa7146_stop_preview(fh); 588 saa7146_start_preview(fh); 589 } 590 return 0; 591 } 592 593 static int vidioc_g_parm(struct file *file, void *fh, 594 struct v4l2_streamparm *parm) 595 { 596 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev; 597 struct saa7146_vv *vv = dev->vv_data; 598 599 if (parm->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) 600 return -EINVAL; 601 parm->parm.capture.readbuffers = 1; 602 v4l2_video_std_frame_period(vv->standard->id, 603 &parm->parm.capture.timeperframe); 604 return 0; 605 } 606 607 static int vidioc_g_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *f) 608 { 609 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev; 610 struct saa7146_vv *vv = dev->vv_data; 611 612 f->fmt.pix = vv->video_fmt; 613 return 0; 614 } 615 616 static int vidioc_g_fmt_vid_overlay(struct file *file, void *fh, struct v4l2_format *f) 617 { 618 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev; 619 struct saa7146_vv *vv = dev->vv_data; 620 621 f->fmt.win = vv->ov.win; 622 return 0; 623 } 624 625 static int vidioc_g_fmt_vbi_cap(struct file *file, void *fh, struct v4l2_format *f) 626 { 627 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev; 628 struct saa7146_vv *vv = dev->vv_data; 629 630 f->fmt.vbi = vv->vbi_fmt; 631 return 0; 632 } 633 634 static int vidioc_try_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *f) 635 { 636 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev; 637 struct saa7146_vv *vv = dev->vv_data; 638 struct saa7146_format *fmt; 639 enum v4l2_field field; 640 int maxw, maxh; 641 int calc_bpl; 642 643 DEB_EE("V4L2_BUF_TYPE_VIDEO_CAPTURE: dev:%p, fh:%p\n", dev, fh); 644 645 fmt = saa7146_format_by_fourcc(dev, f->fmt.pix.pixelformat); 646 if (NULL == fmt) 647 return -EINVAL; 648 649 field = f->fmt.pix.field; 650 maxw = vv->standard->h_max_out; 651 maxh = vv->standard->v_max_out; 652 653 if (V4L2_FIELD_ANY == field) { 654 field = (f->fmt.pix.height > maxh / 2) 655 ? V4L2_FIELD_INTERLACED 656 : V4L2_FIELD_BOTTOM; 657 } 658 switch (field) { 659 case V4L2_FIELD_ALTERNATE: 660 vv->last_field = V4L2_FIELD_TOP; 661 maxh = maxh / 2; 662 break; 663 case V4L2_FIELD_TOP: 664 case V4L2_FIELD_BOTTOM: 665 vv->last_field = V4L2_FIELD_INTERLACED; 666 maxh = maxh / 2; 667 break; 668 case V4L2_FIELD_INTERLACED: 669 vv->last_field = V4L2_FIELD_INTERLACED; 670 break; 671 default: 672 DEB_D("no known field mode '%d'\n", field); 673 return -EINVAL; 674 } 675 676 f->fmt.pix.field = field; 677 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M; 678 if (f->fmt.pix.width > maxw) 679 f->fmt.pix.width = maxw; 680 if (f->fmt.pix.height > maxh) 681 f->fmt.pix.height = maxh; 682 683 calc_bpl = (f->fmt.pix.width * fmt->depth) / 8; 684 685 if (f->fmt.pix.bytesperline < calc_bpl) 686 f->fmt.pix.bytesperline = calc_bpl; 687 688 if (f->fmt.pix.bytesperline > (2 * PAGE_SIZE * fmt->depth) / 8) /* arbitrary constraint */ 689 f->fmt.pix.bytesperline = calc_bpl; 690 691 f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * f->fmt.pix.height; 692 DEB_D("w:%d, h:%d, bytesperline:%d, sizeimage:%d\n", 693 f->fmt.pix.width, f->fmt.pix.height, 694 f->fmt.pix.bytesperline, f->fmt.pix.sizeimage); 695 696 return 0; 697 } 698 699 700 static int vidioc_try_fmt_vid_overlay(struct file *file, void *fh, struct v4l2_format *f) 701 { 702 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev; 703 struct saa7146_vv *vv = dev->vv_data; 704 struct v4l2_window *win = &f->fmt.win; 705 enum v4l2_field field; 706 int maxw, maxh; 707 708 DEB_EE("dev:%p\n", dev); 709 710 if (NULL == vv->ov_fb.base) { 711 DEB_D("no fb base set\n"); 712 return -EINVAL; 713 } 714 if (NULL == vv->ov_fmt) { 715 DEB_D("no fb fmt set\n"); 716 return -EINVAL; 717 } 718 if (win->w.width < 48 || win->w.height < 32) { 719 DEB_D("min width/height. (%d,%d)\n", 720 win->w.width, win->w.height); 721 return -EINVAL; 722 } 723 if (win->clipcount > 16) { 724 DEB_D("clipcount too big\n"); 725 return -EINVAL; 726 } 727 728 field = win->field; 729 maxw = vv->standard->h_max_out; 730 maxh = vv->standard->v_max_out; 731 732 if (V4L2_FIELD_ANY == field) { 733 field = (win->w.height > maxh / 2) 734 ? V4L2_FIELD_INTERLACED 735 : V4L2_FIELD_TOP; 736 } 737 switch (field) { 738 case V4L2_FIELD_TOP: 739 case V4L2_FIELD_BOTTOM: 740 case V4L2_FIELD_ALTERNATE: 741 maxh = maxh / 2; 742 break; 743 case V4L2_FIELD_INTERLACED: 744 break; 745 default: 746 DEB_D("no known field mode '%d'\n", field); 747 return -EINVAL; 748 } 749 750 win->field = field; 751 if (win->w.width > maxw) 752 win->w.width = maxw; 753 if (win->w.height > maxh) 754 win->w.height = maxh; 755 756 return 0; 757 } 758 759 static int vidioc_s_fmt_vid_cap(struct file *file, void *__fh, struct v4l2_format *f) 760 { 761 struct saa7146_fh *fh = __fh; 762 struct saa7146_dev *dev = fh->dev; 763 struct saa7146_vv *vv = dev->vv_data; 764 int err; 765 766 DEB_EE("V4L2_BUF_TYPE_VIDEO_CAPTURE: dev:%p, fh:%p\n", dev, fh); 767 if (IS_CAPTURE_ACTIVE(fh) != 0) { 768 DEB_EE("streaming capture is active\n"); 769 return -EBUSY; 770 } 771 err = vidioc_try_fmt_vid_cap(file, fh, f); 772 if (0 != err) 773 return err; 774 vv->video_fmt = f->fmt.pix; 775 DEB_EE("set to pixelformat '%4.4s'\n", 776 (char *)&vv->video_fmt.pixelformat); 777 return 0; 778 } 779 780 static int vidioc_s_fmt_vid_overlay(struct file *file, void *__fh, struct v4l2_format *f) 781 { 782 struct saa7146_fh *fh = __fh; 783 struct saa7146_dev *dev = fh->dev; 784 struct saa7146_vv *vv = dev->vv_data; 785 int err; 786 787 DEB_EE("V4L2_BUF_TYPE_VIDEO_OVERLAY: dev:%p, fh:%p\n", dev, fh); 788 err = vidioc_try_fmt_vid_overlay(file, fh, f); 789 if (0 != err) 790 return err; 791 vv->ov.win = f->fmt.win; 792 vv->ov.nclips = f->fmt.win.clipcount; 793 if (vv->ov.nclips > 16) 794 vv->ov.nclips = 16; 795 if (copy_from_user(vv->ov.clips, f->fmt.win.clips, 796 sizeof(struct v4l2_clip) * vv->ov.nclips)) { 797 return -EFAULT; 798 } 799 800 /* vv->ov.fh is used to indicate that we have valid overlay informations, too */ 801 vv->ov.fh = fh; 802 803 /* check if our current overlay is active */ 804 if (IS_OVERLAY_ACTIVE(fh) != 0) { 805 saa7146_stop_preview(fh); 806 saa7146_start_preview(fh); 807 } 808 return 0; 809 } 810 811 static int vidioc_g_std(struct file *file, void *fh, v4l2_std_id *norm) 812 { 813 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev; 814 struct saa7146_vv *vv = dev->vv_data; 815 816 *norm = vv->standard->id; 817 return 0; 818 } 819 820 /* the saa7146 supfhrts (used in conjunction with the saa7111a for example) 821 PAL / NTSC / SECAM. if your hardware does not (or does more) 822 -- override this function in your extension */ 823 /* 824 case VIDIOC_ENUMSTD: 825 { 826 struct v4l2_standard *e = arg; 827 if (e->index < 0 ) 828 return -EINVAL; 829 if( e->index < dev->ext_vv_data->num_stds ) { 830 DEB_EE("VIDIOC_ENUMSTD: index:%d\n", e->index); 831 v4l2_video_std_construct(e, dev->ext_vv_data->stds[e->index].id, dev->ext_vv_data->stds[e->index].name); 832 return 0; 833 } 834 return -EINVAL; 835 } 836 */ 837 838 static int vidioc_s_std(struct file *file, void *fh, v4l2_std_id id) 839 { 840 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev; 841 struct saa7146_vv *vv = dev->vv_data; 842 int found = 0; 843 int err, i; 844 845 DEB_EE("VIDIOC_S_STD\n"); 846 847 if ((vv->video_status & STATUS_CAPTURE) == STATUS_CAPTURE) { 848 DEB_D("cannot change video standard while streaming capture is active\n"); 849 return -EBUSY; 850 } 851 852 if ((vv->video_status & STATUS_OVERLAY) != 0) { 853 vv->ov_suspend = vv->video_fh; 854 err = saa7146_stop_preview(vv->video_fh); /* side effect: video_status is now 0, video_fh is NULL */ 855 if (0 != err) { 856 DEB_D("suspending video failed. aborting\n"); 857 return err; 858 } 859 } 860 861 for (i = 0; i < dev->ext_vv_data->num_stds; i++) 862 if (id & dev->ext_vv_data->stds[i].id) 863 break; 864 if (i != dev->ext_vv_data->num_stds) { 865 vv->standard = &dev->ext_vv_data->stds[i]; 866 if (NULL != dev->ext_vv_data->std_callback) 867 dev->ext_vv_data->std_callback(dev, vv->standard); 868 found = 1; 869 } 870 871 if (vv->ov_suspend != NULL) { 872 saa7146_start_preview(vv->ov_suspend); 873 vv->ov_suspend = NULL; 874 } 875 876 if (!found) { 877 DEB_EE("VIDIOC_S_STD: standard not found\n"); 878 return -EINVAL; 879 } 880 881 DEB_EE("VIDIOC_S_STD: set to standard to '%s'\n", vv->standard->name); 882 return 0; 883 } 884 885 static int vidioc_overlay(struct file *file, void *fh, unsigned int on) 886 { 887 int err; 888 889 DEB_D("VIDIOC_OVERLAY on:%d\n", on); 890 if (on) 891 err = saa7146_start_preview(fh); 892 else 893 err = saa7146_stop_preview(fh); 894 return err; 895 } 896 897 static int vidioc_reqbufs(struct file *file, void *__fh, struct v4l2_requestbuffers *b) 898 { 899 struct saa7146_fh *fh = __fh; 900 901 if (b->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) 902 return videobuf_reqbufs(&fh->video_q, b); 903 if (b->type == V4L2_BUF_TYPE_VBI_CAPTURE) 904 return videobuf_reqbufs(&fh->vbi_q, b); 905 return -EINVAL; 906 } 907 908 static int vidioc_querybuf(struct file *file, void *__fh, struct v4l2_buffer *buf) 909 { 910 struct saa7146_fh *fh = __fh; 911 912 if (buf->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) 913 return videobuf_querybuf(&fh->video_q, buf); 914 if (buf->type == V4L2_BUF_TYPE_VBI_CAPTURE) 915 return videobuf_querybuf(&fh->vbi_q, buf); 916 return -EINVAL; 917 } 918 919 static int vidioc_qbuf(struct file *file, void *__fh, struct v4l2_buffer *buf) 920 { 921 struct saa7146_fh *fh = __fh; 922 923 if (buf->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) 924 return videobuf_qbuf(&fh->video_q, buf); 925 if (buf->type == V4L2_BUF_TYPE_VBI_CAPTURE) 926 return videobuf_qbuf(&fh->vbi_q, buf); 927 return -EINVAL; 928 } 929 930 static int vidioc_dqbuf(struct file *file, void *__fh, struct v4l2_buffer *buf) 931 { 932 struct saa7146_fh *fh = __fh; 933 934 if (buf->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) 935 return videobuf_dqbuf(&fh->video_q, buf, file->f_flags & O_NONBLOCK); 936 if (buf->type == V4L2_BUF_TYPE_VBI_CAPTURE) 937 return videobuf_dqbuf(&fh->vbi_q, buf, file->f_flags & O_NONBLOCK); 938 return -EINVAL; 939 } 940 941 static int vidioc_streamon(struct file *file, void *__fh, enum v4l2_buf_type type) 942 { 943 struct saa7146_fh *fh = __fh; 944 int err; 945 946 DEB_D("VIDIOC_STREAMON, type:%d\n", type); 947 948 err = video_begin(fh); 949 if (err) 950 return err; 951 if (type == V4L2_BUF_TYPE_VIDEO_CAPTURE) 952 return videobuf_streamon(&fh->video_q); 953 if (type == V4L2_BUF_TYPE_VBI_CAPTURE) 954 return videobuf_streamon(&fh->vbi_q); 955 return -EINVAL; 956 } 957 958 static int vidioc_streamoff(struct file *file, void *__fh, enum v4l2_buf_type type) 959 { 960 struct saa7146_fh *fh = __fh; 961 struct saa7146_dev *dev = fh->dev; 962 struct saa7146_vv *vv = dev->vv_data; 963 int err; 964 965 DEB_D("VIDIOC_STREAMOFF, type:%d\n", type); 966 967 /* ugly: we need to copy some checks from video_end(), 968 because videobuf_streamoff() relies on the capture running. 969 check and fix this */ 970 if ((vv->video_status & STATUS_CAPTURE) != STATUS_CAPTURE) { 971 DEB_S("not capturing\n"); 972 return 0; 973 } 974 975 if (vv->video_fh != fh) { 976 DEB_S("capturing, but in another open\n"); 977 return -EBUSY; 978 } 979 980 err = -EINVAL; 981 if (type == V4L2_BUF_TYPE_VIDEO_CAPTURE) 982 err = videobuf_streamoff(&fh->video_q); 983 else if (type == V4L2_BUF_TYPE_VBI_CAPTURE) 984 err = videobuf_streamoff(&fh->vbi_q); 985 if (0 != err) { 986 DEB_D("warning: videobuf_streamoff() failed\n"); 987 video_end(fh, file); 988 } else { 989 err = video_end(fh, file); 990 } 991 return err; 992 } 993 994 const struct v4l2_ioctl_ops saa7146_video_ioctl_ops = { 995 .vidioc_querycap = vidioc_querycap, 996 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, 997 .vidioc_enum_fmt_vid_overlay = vidioc_enum_fmt_vid_cap, 998 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap, 999 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap, 1000 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, 1001 .vidioc_g_fmt_vid_overlay = vidioc_g_fmt_vid_overlay, 1002 .vidioc_try_fmt_vid_overlay = vidioc_try_fmt_vid_overlay, 1003 .vidioc_s_fmt_vid_overlay = vidioc_s_fmt_vid_overlay, 1004 1005 .vidioc_overlay = vidioc_overlay, 1006 .vidioc_g_fbuf = vidioc_g_fbuf, 1007 .vidioc_s_fbuf = vidioc_s_fbuf, 1008 .vidioc_reqbufs = vidioc_reqbufs, 1009 .vidioc_querybuf = vidioc_querybuf, 1010 .vidioc_qbuf = vidioc_qbuf, 1011 .vidioc_dqbuf = vidioc_dqbuf, 1012 .vidioc_g_std = vidioc_g_std, 1013 .vidioc_s_std = vidioc_s_std, 1014 .vidioc_streamon = vidioc_streamon, 1015 .vidioc_streamoff = vidioc_streamoff, 1016 .vidioc_g_parm = vidioc_g_parm, 1017 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, 1018 .vidioc_unsubscribe_event = v4l2_event_unsubscribe, 1019 }; 1020 1021 const struct v4l2_ioctl_ops saa7146_vbi_ioctl_ops = { 1022 .vidioc_querycap = vidioc_querycap, 1023 .vidioc_g_fmt_vbi_cap = vidioc_g_fmt_vbi_cap, 1024 1025 .vidioc_reqbufs = vidioc_reqbufs, 1026 .vidioc_querybuf = vidioc_querybuf, 1027 .vidioc_qbuf = vidioc_qbuf, 1028 .vidioc_dqbuf = vidioc_dqbuf, 1029 .vidioc_g_std = vidioc_g_std, 1030 .vidioc_s_std = vidioc_s_std, 1031 .vidioc_streamon = vidioc_streamon, 1032 .vidioc_streamoff = vidioc_streamoff, 1033 .vidioc_g_parm = vidioc_g_parm, 1034 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, 1035 .vidioc_unsubscribe_event = v4l2_event_unsubscribe, 1036 }; 1037 1038 /*********************************************************************************/ 1039 /* buffer handling functions */ 1040 1041 static int buffer_activate (struct saa7146_dev *dev, 1042 struct saa7146_buf *buf, 1043 struct saa7146_buf *next) 1044 { 1045 struct saa7146_vv *vv = dev->vv_data; 1046 1047 buf->vb.state = VIDEOBUF_ACTIVE; 1048 saa7146_set_capture(dev,buf,next); 1049 1050 mod_timer(&vv->video_dmaq.timeout, jiffies+BUFFER_TIMEOUT); 1051 return 0; 1052 } 1053 1054 static void release_all_pagetables(struct saa7146_dev *dev, struct saa7146_buf *buf) 1055 { 1056 saa7146_pgtable_free(dev->pci, &buf->pt[0]); 1057 saa7146_pgtable_free(dev->pci, &buf->pt[1]); 1058 saa7146_pgtable_free(dev->pci, &buf->pt[2]); 1059 } 1060 1061 static int buffer_prepare(struct videobuf_queue *q, 1062 struct videobuf_buffer *vb, enum v4l2_field field) 1063 { 1064 struct file *file = q->priv_data; 1065 struct saa7146_fh *fh = file->private_data; 1066 struct saa7146_dev *dev = fh->dev; 1067 struct saa7146_vv *vv = dev->vv_data; 1068 struct saa7146_buf *buf = (struct saa7146_buf *)vb; 1069 int size,err = 0; 1070 1071 DEB_CAP("vbuf:%p\n", vb); 1072 1073 /* sanity checks */ 1074 if (vv->video_fmt.width < 48 || 1075 vv->video_fmt.height < 32 || 1076 vv->video_fmt.width > vv->standard->h_max_out || 1077 vv->video_fmt.height > vv->standard->v_max_out) { 1078 DEB_D("w (%d) / h (%d) out of bounds\n", 1079 vv->video_fmt.width, vv->video_fmt.height); 1080 return -EINVAL; 1081 } 1082 1083 size = vv->video_fmt.sizeimage; 1084 if (0 != buf->vb.baddr && buf->vb.bsize < size) { 1085 DEB_D("size mismatch\n"); 1086 return -EINVAL; 1087 } 1088 1089 DEB_CAP("buffer_prepare [size=%dx%d,bytes=%d,fields=%s]\n", 1090 vv->video_fmt.width, vv->video_fmt.height, 1091 size, v4l2_field_names[vv->video_fmt.field]); 1092 if (buf->vb.width != vv->video_fmt.width || 1093 buf->vb.bytesperline != vv->video_fmt.bytesperline || 1094 buf->vb.height != vv->video_fmt.height || 1095 buf->vb.size != size || 1096 buf->vb.field != field || 1097 buf->vb.field != vv->video_fmt.field || 1098 buf->fmt != &vv->video_fmt) { 1099 saa7146_dma_free(dev,q,buf); 1100 } 1101 1102 if (VIDEOBUF_NEEDS_INIT == buf->vb.state) { 1103 struct saa7146_format *sfmt; 1104 1105 buf->vb.bytesperline = vv->video_fmt.bytesperline; 1106 buf->vb.width = vv->video_fmt.width; 1107 buf->vb.height = vv->video_fmt.height; 1108 buf->vb.size = size; 1109 buf->vb.field = field; 1110 buf->fmt = &vv->video_fmt; 1111 buf->vb.field = vv->video_fmt.field; 1112 1113 sfmt = saa7146_format_by_fourcc(dev,buf->fmt->pixelformat); 1114 1115 release_all_pagetables(dev, buf); 1116 if( 0 != IS_PLANAR(sfmt->trans)) { 1117 saa7146_pgtable_alloc(dev->pci, &buf->pt[0]); 1118 saa7146_pgtable_alloc(dev->pci, &buf->pt[1]); 1119 saa7146_pgtable_alloc(dev->pci, &buf->pt[2]); 1120 } else { 1121 saa7146_pgtable_alloc(dev->pci, &buf->pt[0]); 1122 } 1123 1124 err = videobuf_iolock(q,&buf->vb, &vv->ov_fb); 1125 if (err) 1126 goto oops; 1127 err = saa7146_pgtable_build(dev,buf); 1128 if (err) 1129 goto oops; 1130 } 1131 buf->vb.state = VIDEOBUF_PREPARED; 1132 buf->activate = buffer_activate; 1133 1134 return 0; 1135 1136 oops: 1137 DEB_D("error out\n"); 1138 saa7146_dma_free(dev,q,buf); 1139 1140 return err; 1141 } 1142 1143 static int buffer_setup(struct videobuf_queue *q, unsigned int *count, unsigned int *size) 1144 { 1145 struct file *file = q->priv_data; 1146 struct saa7146_fh *fh = file->private_data; 1147 struct saa7146_vv *vv = fh->dev->vv_data; 1148 1149 if (0 == *count || *count > MAX_SAA7146_CAPTURE_BUFFERS) 1150 *count = MAX_SAA7146_CAPTURE_BUFFERS; 1151 1152 *size = vv->video_fmt.sizeimage; 1153 1154 /* check if we exceed the "max_memory" parameter */ 1155 if( (*count * *size) > (max_memory*1048576) ) { 1156 *count = (max_memory*1048576) / *size; 1157 } 1158 1159 DEB_CAP("%d buffers, %d bytes each\n", *count, *size); 1160 1161 return 0; 1162 } 1163 1164 static void buffer_queue(struct videobuf_queue *q, struct videobuf_buffer *vb) 1165 { 1166 struct file *file = q->priv_data; 1167 struct saa7146_fh *fh = file->private_data; 1168 struct saa7146_dev *dev = fh->dev; 1169 struct saa7146_vv *vv = dev->vv_data; 1170 struct saa7146_buf *buf = (struct saa7146_buf *)vb; 1171 1172 DEB_CAP("vbuf:%p\n", vb); 1173 saa7146_buffer_queue(fh->dev, &vv->video_dmaq, buf); 1174 } 1175 1176 static void buffer_release(struct videobuf_queue *q, struct videobuf_buffer *vb) 1177 { 1178 struct file *file = q->priv_data; 1179 struct saa7146_fh *fh = file->private_data; 1180 struct saa7146_dev *dev = fh->dev; 1181 struct saa7146_buf *buf = (struct saa7146_buf *)vb; 1182 1183 DEB_CAP("vbuf:%p\n", vb); 1184 1185 saa7146_dma_free(dev,q,buf); 1186 1187 release_all_pagetables(dev, buf); 1188 } 1189 1190 static struct videobuf_queue_ops video_qops = { 1191 .buf_setup = buffer_setup, 1192 .buf_prepare = buffer_prepare, 1193 .buf_queue = buffer_queue, 1194 .buf_release = buffer_release, 1195 }; 1196 1197 /********************************************************************************/ 1198 /* file operations */ 1199 1200 static void video_init(struct saa7146_dev *dev, struct saa7146_vv *vv) 1201 { 1202 INIT_LIST_HEAD(&vv->video_dmaq.queue); 1203 1204 setup_timer(&vv->video_dmaq.timeout, saa7146_buffer_timeout, 1205 (unsigned long)(&vv->video_dmaq)); 1206 vv->video_dmaq.dev = dev; 1207 1208 /* set some default values */ 1209 vv->standard = &dev->ext_vv_data->stds[0]; 1210 1211 /* FIXME: what's this? */ 1212 vv->current_hps_source = SAA7146_HPS_SOURCE_PORT_A; 1213 vv->current_hps_sync = SAA7146_HPS_SYNC_PORT_A; 1214 } 1215 1216 1217 static int video_open(struct saa7146_dev *dev, struct file *file) 1218 { 1219 struct saa7146_fh *fh = file->private_data; 1220 1221 videobuf_queue_sg_init(&fh->video_q, &video_qops, 1222 &dev->pci->dev, &dev->slock, 1223 V4L2_BUF_TYPE_VIDEO_CAPTURE, 1224 V4L2_FIELD_INTERLACED, 1225 sizeof(struct saa7146_buf), 1226 file, &dev->v4l2_lock); 1227 1228 return 0; 1229 } 1230 1231 1232 static void video_close(struct saa7146_dev *dev, struct file *file) 1233 { 1234 struct saa7146_fh *fh = file->private_data; 1235 struct saa7146_vv *vv = dev->vv_data; 1236 struct videobuf_queue *q = &fh->video_q; 1237 1238 if (IS_CAPTURE_ACTIVE(fh) != 0) 1239 video_end(fh, file); 1240 else if (IS_OVERLAY_ACTIVE(fh) != 0) 1241 saa7146_stop_preview(fh); 1242 1243 videobuf_stop(q); 1244 /* hmm, why is this function declared void? */ 1245 } 1246 1247 1248 static void video_irq_done(struct saa7146_dev *dev, unsigned long st) 1249 { 1250 struct saa7146_vv *vv = dev->vv_data; 1251 struct saa7146_dmaqueue *q = &vv->video_dmaq; 1252 1253 spin_lock(&dev->slock); 1254 DEB_CAP("called\n"); 1255 1256 /* only finish the buffer if we have one... */ 1257 if( NULL != q->curr ) { 1258 saa7146_buffer_finish(dev,q,VIDEOBUF_DONE); 1259 } 1260 saa7146_buffer_next(dev,q,0); 1261 1262 spin_unlock(&dev->slock); 1263 } 1264 1265 static ssize_t video_read(struct file *file, char __user *data, size_t count, loff_t *ppos) 1266 { 1267 struct saa7146_fh *fh = file->private_data; 1268 struct saa7146_dev *dev = fh->dev; 1269 struct saa7146_vv *vv = dev->vv_data; 1270 ssize_t ret = 0; 1271 1272 DEB_EE("called\n"); 1273 1274 if ((vv->video_status & STATUS_CAPTURE) != 0) { 1275 /* fixme: should we allow read() captures while streaming capture? */ 1276 if (vv->video_fh == fh) { 1277 DEB_S("already capturing\n"); 1278 return -EBUSY; 1279 } 1280 DEB_S("already capturing in another open\n"); 1281 return -EBUSY; 1282 } 1283 1284 ret = video_begin(fh); 1285 if( 0 != ret) { 1286 goto out; 1287 } 1288 1289 ret = videobuf_read_one(&fh->video_q , data, count, ppos, 1290 file->f_flags & O_NONBLOCK); 1291 if (ret != 0) { 1292 video_end(fh, file); 1293 } else { 1294 ret = video_end(fh, file); 1295 } 1296 out: 1297 /* restart overlay if it was active before */ 1298 if (vv->ov_suspend != NULL) { 1299 saa7146_start_preview(vv->ov_suspend); 1300 vv->ov_suspend = NULL; 1301 } 1302 1303 return ret; 1304 } 1305 1306 struct saa7146_use_ops saa7146_video_uops = { 1307 .init = video_init, 1308 .open = video_open, 1309 .release = video_close, 1310 .irq_done = video_irq_done, 1311 .read = video_read, 1312 }; 1313