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