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 saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev; 452 453 strscpy((char *)cap->driver, "saa7146 v4l2", sizeof(cap->driver)); 454 strscpy((char *)cap->card, dev->ext->name, sizeof(cap->card)); 455 sprintf((char *)cap->bus_info, "PCI:%s", pci_name(dev->pci)); 456 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OVERLAY | 457 V4L2_CAP_READWRITE | V4L2_CAP_STREAMING | 458 V4L2_CAP_DEVICE_CAPS; 459 cap->capabilities |= dev->ext_vv_data->capabilities; 460 return 0; 461 } 462 463 static int vidioc_g_fbuf(struct file *file, void *fh, struct v4l2_framebuffer *fb) 464 { 465 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev; 466 struct saa7146_vv *vv = dev->vv_data; 467 468 *fb = vv->ov_fb; 469 fb->capability = V4L2_FBUF_CAP_LIST_CLIPPING; 470 fb->flags = V4L2_FBUF_FLAG_PRIMARY; 471 return 0; 472 } 473 474 static int vidioc_s_fbuf(struct file *file, void *fh, const struct v4l2_framebuffer *fb) 475 { 476 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev; 477 struct saa7146_vv *vv = dev->vv_data; 478 struct saa7146_format *fmt; 479 480 DEB_EE("VIDIOC_S_FBUF\n"); 481 482 if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO)) 483 return -EPERM; 484 485 /* check args */ 486 fmt = saa7146_format_by_fourcc(dev, fb->fmt.pixelformat); 487 if (NULL == fmt) 488 return -EINVAL; 489 490 /* planar formats are not allowed for overlay video, clipping and video dma would clash */ 491 if (fmt->flags & FORMAT_IS_PLANAR) 492 DEB_S("planar pixelformat '%4.4s' not allowed for overlay\n", 493 (char *)&fmt->pixelformat); 494 495 /* check if overlay is running */ 496 if (IS_OVERLAY_ACTIVE(fh) != 0) { 497 if (vv->video_fh != fh) { 498 DEB_D("refusing to change framebuffer information while overlay is active in another open\n"); 499 return -EBUSY; 500 } 501 } 502 503 /* ok, accept it */ 504 vv->ov_fb = *fb; 505 vv->ov_fmt = fmt; 506 507 if (vv->ov_fb.fmt.bytesperline < vv->ov_fb.fmt.width) { 508 vv->ov_fb.fmt.bytesperline = vv->ov_fb.fmt.width * fmt->depth / 8; 509 DEB_D("setting bytesperline to %d\n", vv->ov_fb.fmt.bytesperline); 510 } 511 return 0; 512 } 513 514 static int vidioc_enum_fmt_vid_cap(struct file *file, void *fh, struct v4l2_fmtdesc *f) 515 { 516 if (f->index >= ARRAY_SIZE(formats)) 517 return -EINVAL; 518 strscpy((char *)f->description, formats[f->index].name, 519 sizeof(f->description)); 520 f->pixelformat = formats[f->index].pixelformat; 521 return 0; 522 } 523 524 int saa7146_s_ctrl(struct v4l2_ctrl *ctrl) 525 { 526 struct saa7146_dev *dev = container_of(ctrl->handler, 527 struct saa7146_dev, ctrl_handler); 528 struct saa7146_vv *vv = dev->vv_data; 529 u32 val; 530 531 switch (ctrl->id) { 532 case V4L2_CID_BRIGHTNESS: 533 val = saa7146_read(dev, BCS_CTRL); 534 val &= 0x00ffffff; 535 val |= (ctrl->val << 24); 536 saa7146_write(dev, BCS_CTRL, val); 537 saa7146_write(dev, MC2, MASK_22 | MASK_06); 538 break; 539 540 case V4L2_CID_CONTRAST: 541 val = saa7146_read(dev, BCS_CTRL); 542 val &= 0xff00ffff; 543 val |= (ctrl->val << 16); 544 saa7146_write(dev, BCS_CTRL, val); 545 saa7146_write(dev, MC2, MASK_22 | MASK_06); 546 break; 547 548 case V4L2_CID_SATURATION: 549 val = saa7146_read(dev, BCS_CTRL); 550 val &= 0xffffff00; 551 val |= (ctrl->val << 0); 552 saa7146_write(dev, BCS_CTRL, val); 553 saa7146_write(dev, MC2, MASK_22 | MASK_06); 554 break; 555 556 case V4L2_CID_HFLIP: 557 /* fixme: we can support changing VFLIP and HFLIP here... */ 558 if ((vv->video_status & STATUS_CAPTURE)) 559 return -EBUSY; 560 vv->hflip = ctrl->val; 561 break; 562 563 case V4L2_CID_VFLIP: 564 if ((vv->video_status & STATUS_CAPTURE)) 565 return -EBUSY; 566 vv->vflip = ctrl->val; 567 break; 568 569 default: 570 return -EINVAL; 571 } 572 573 if ((vv->video_status & STATUS_OVERLAY) != 0) { /* CHECK: && (vv->video_fh == fh)) */ 574 struct saa7146_fh *fh = vv->video_fh; 575 576 saa7146_stop_preview(fh); 577 saa7146_start_preview(fh); 578 } 579 return 0; 580 } 581 582 static int vidioc_g_parm(struct file *file, void *fh, 583 struct v4l2_streamparm *parm) 584 { 585 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev; 586 struct saa7146_vv *vv = dev->vv_data; 587 588 if (parm->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) 589 return -EINVAL; 590 parm->parm.capture.readbuffers = 1; 591 v4l2_video_std_frame_period(vv->standard->id, 592 &parm->parm.capture.timeperframe); 593 return 0; 594 } 595 596 static int vidioc_g_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *f) 597 { 598 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev; 599 struct saa7146_vv *vv = dev->vv_data; 600 601 f->fmt.pix = vv->video_fmt; 602 return 0; 603 } 604 605 static int vidioc_g_fmt_vid_overlay(struct file *file, void *fh, struct v4l2_format *f) 606 { 607 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev; 608 struct saa7146_vv *vv = dev->vv_data; 609 610 f->fmt.win = vv->ov.win; 611 return 0; 612 } 613 614 static int vidioc_g_fmt_vbi_cap(struct file *file, void *fh, struct v4l2_format *f) 615 { 616 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev; 617 struct saa7146_vv *vv = dev->vv_data; 618 619 f->fmt.vbi = vv->vbi_fmt; 620 return 0; 621 } 622 623 static int vidioc_try_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *f) 624 { 625 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev; 626 struct saa7146_vv *vv = dev->vv_data; 627 struct saa7146_format *fmt; 628 enum v4l2_field field; 629 int maxw, maxh; 630 int calc_bpl; 631 632 DEB_EE("V4L2_BUF_TYPE_VIDEO_CAPTURE: dev:%p, fh:%p\n", dev, fh); 633 634 fmt = saa7146_format_by_fourcc(dev, f->fmt.pix.pixelformat); 635 if (NULL == fmt) 636 return -EINVAL; 637 638 field = f->fmt.pix.field; 639 maxw = vv->standard->h_max_out; 640 maxh = vv->standard->v_max_out; 641 642 if (V4L2_FIELD_ANY == field) { 643 field = (f->fmt.pix.height > maxh / 2) 644 ? V4L2_FIELD_INTERLACED 645 : V4L2_FIELD_BOTTOM; 646 } 647 switch (field) { 648 case V4L2_FIELD_ALTERNATE: 649 vv->last_field = V4L2_FIELD_TOP; 650 maxh = maxh / 2; 651 break; 652 case V4L2_FIELD_TOP: 653 case V4L2_FIELD_BOTTOM: 654 vv->last_field = V4L2_FIELD_INTERLACED; 655 maxh = maxh / 2; 656 break; 657 case V4L2_FIELD_INTERLACED: 658 vv->last_field = V4L2_FIELD_INTERLACED; 659 break; 660 default: 661 DEB_D("no known field mode '%d'\n", field); 662 return -EINVAL; 663 } 664 665 f->fmt.pix.field = field; 666 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M; 667 if (f->fmt.pix.width > maxw) 668 f->fmt.pix.width = maxw; 669 if (f->fmt.pix.height > maxh) 670 f->fmt.pix.height = maxh; 671 672 calc_bpl = (f->fmt.pix.width * fmt->depth) / 8; 673 674 if (f->fmt.pix.bytesperline < calc_bpl) 675 f->fmt.pix.bytesperline = calc_bpl; 676 677 if (f->fmt.pix.bytesperline > (2 * PAGE_SIZE * fmt->depth) / 8) /* arbitrary constraint */ 678 f->fmt.pix.bytesperline = calc_bpl; 679 680 f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * f->fmt.pix.height; 681 DEB_D("w:%d, h:%d, bytesperline:%d, sizeimage:%d\n", 682 f->fmt.pix.width, f->fmt.pix.height, 683 f->fmt.pix.bytesperline, f->fmt.pix.sizeimage); 684 685 return 0; 686 } 687 688 689 static int vidioc_try_fmt_vid_overlay(struct file *file, void *fh, struct v4l2_format *f) 690 { 691 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev; 692 struct saa7146_vv *vv = dev->vv_data; 693 struct v4l2_window *win = &f->fmt.win; 694 enum v4l2_field field; 695 int maxw, maxh; 696 697 DEB_EE("dev:%p\n", dev); 698 699 if (NULL == vv->ov_fb.base) { 700 DEB_D("no fb base set\n"); 701 return -EINVAL; 702 } 703 if (NULL == vv->ov_fmt) { 704 DEB_D("no fb fmt set\n"); 705 return -EINVAL; 706 } 707 if (win->w.width < 48 || win->w.height < 32) { 708 DEB_D("min width/height. (%d,%d)\n", 709 win->w.width, win->w.height); 710 return -EINVAL; 711 } 712 if (win->clipcount > 16) { 713 DEB_D("clipcount too big\n"); 714 return -EINVAL; 715 } 716 717 field = win->field; 718 maxw = vv->standard->h_max_out; 719 maxh = vv->standard->v_max_out; 720 721 if (V4L2_FIELD_ANY == field) { 722 field = (win->w.height > maxh / 2) 723 ? V4L2_FIELD_INTERLACED 724 : V4L2_FIELD_TOP; 725 } 726 switch (field) { 727 case V4L2_FIELD_TOP: 728 case V4L2_FIELD_BOTTOM: 729 case V4L2_FIELD_ALTERNATE: 730 maxh = maxh / 2; 731 break; 732 case V4L2_FIELD_INTERLACED: 733 break; 734 default: 735 DEB_D("no known field mode '%d'\n", field); 736 return -EINVAL; 737 } 738 739 win->field = field; 740 if (win->w.width > maxw) 741 win->w.width = maxw; 742 if (win->w.height > maxh) 743 win->w.height = maxh; 744 745 return 0; 746 } 747 748 static int vidioc_s_fmt_vid_cap(struct file *file, void *__fh, struct v4l2_format *f) 749 { 750 struct saa7146_fh *fh = __fh; 751 struct saa7146_dev *dev = fh->dev; 752 struct saa7146_vv *vv = dev->vv_data; 753 int err; 754 755 DEB_EE("V4L2_BUF_TYPE_VIDEO_CAPTURE: dev:%p, fh:%p\n", dev, fh); 756 if (IS_CAPTURE_ACTIVE(fh) != 0) { 757 DEB_EE("streaming capture is active\n"); 758 return -EBUSY; 759 } 760 err = vidioc_try_fmt_vid_cap(file, fh, f); 761 if (0 != err) 762 return err; 763 vv->video_fmt = f->fmt.pix; 764 DEB_EE("set to pixelformat '%4.4s'\n", 765 (char *)&vv->video_fmt.pixelformat); 766 return 0; 767 } 768 769 static int vidioc_s_fmt_vid_overlay(struct file *file, void *__fh, struct v4l2_format *f) 770 { 771 struct saa7146_fh *fh = __fh; 772 struct saa7146_dev *dev = fh->dev; 773 struct saa7146_vv *vv = dev->vv_data; 774 int err; 775 776 DEB_EE("V4L2_BUF_TYPE_VIDEO_OVERLAY: dev:%p, fh:%p\n", dev, fh); 777 err = vidioc_try_fmt_vid_overlay(file, fh, f); 778 if (0 != err) 779 return err; 780 vv->ov.win = f->fmt.win; 781 vv->ov.nclips = f->fmt.win.clipcount; 782 if (vv->ov.nclips > 16) 783 vv->ov.nclips = 16; 784 if (copy_from_user(vv->ov.clips, f->fmt.win.clips, 785 sizeof(struct v4l2_clip) * vv->ov.nclips)) { 786 return -EFAULT; 787 } 788 789 /* vv->ov.fh is used to indicate that we have valid overlay information, too */ 790 vv->ov.fh = fh; 791 792 /* check if our current overlay is active */ 793 if (IS_OVERLAY_ACTIVE(fh) != 0) { 794 saa7146_stop_preview(fh); 795 saa7146_start_preview(fh); 796 } 797 return 0; 798 } 799 800 static int vidioc_g_std(struct file *file, void *fh, v4l2_std_id *norm) 801 { 802 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev; 803 struct saa7146_vv *vv = dev->vv_data; 804 805 *norm = vv->standard->id; 806 return 0; 807 } 808 809 /* the saa7146 supfhrts (used in conjunction with the saa7111a for example) 810 PAL / NTSC / SECAM. if your hardware does not (or does more) 811 -- override this function in your extension */ 812 /* 813 case VIDIOC_ENUMSTD: 814 { 815 struct v4l2_standard *e = arg; 816 if (e->index < 0 ) 817 return -EINVAL; 818 if( e->index < dev->ext_vv_data->num_stds ) { 819 DEB_EE("VIDIOC_ENUMSTD: index:%d\n", e->index); 820 v4l2_video_std_construct(e, dev->ext_vv_data->stds[e->index].id, dev->ext_vv_data->stds[e->index].name); 821 return 0; 822 } 823 return -EINVAL; 824 } 825 */ 826 827 static int vidioc_s_std(struct file *file, void *fh, v4l2_std_id id) 828 { 829 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev; 830 struct saa7146_vv *vv = dev->vv_data; 831 int found = 0; 832 int err, i; 833 834 DEB_EE("VIDIOC_S_STD\n"); 835 836 if ((vv->video_status & STATUS_CAPTURE) == STATUS_CAPTURE) { 837 DEB_D("cannot change video standard while streaming capture is active\n"); 838 return -EBUSY; 839 } 840 841 if ((vv->video_status & STATUS_OVERLAY) != 0) { 842 vv->ov_suspend = vv->video_fh; 843 err = saa7146_stop_preview(vv->video_fh); /* side effect: video_status is now 0, video_fh is NULL */ 844 if (0 != err) { 845 DEB_D("suspending video failed. aborting\n"); 846 return err; 847 } 848 } 849 850 for (i = 0; i < dev->ext_vv_data->num_stds; i++) 851 if (id & dev->ext_vv_data->stds[i].id) 852 break; 853 if (i != dev->ext_vv_data->num_stds) { 854 vv->standard = &dev->ext_vv_data->stds[i]; 855 if (NULL != dev->ext_vv_data->std_callback) 856 dev->ext_vv_data->std_callback(dev, vv->standard); 857 found = 1; 858 } 859 860 if (vv->ov_suspend != NULL) { 861 saa7146_start_preview(vv->ov_suspend); 862 vv->ov_suspend = NULL; 863 } 864 865 if (!found) { 866 DEB_EE("VIDIOC_S_STD: standard not found\n"); 867 return -EINVAL; 868 } 869 870 DEB_EE("VIDIOC_S_STD: set to standard to '%s'\n", vv->standard->name); 871 return 0; 872 } 873 874 static int vidioc_overlay(struct file *file, void *fh, unsigned int on) 875 { 876 int err; 877 878 DEB_D("VIDIOC_OVERLAY on:%d\n", on); 879 if (on) 880 err = saa7146_start_preview(fh); 881 else 882 err = saa7146_stop_preview(fh); 883 return err; 884 } 885 886 static int vidioc_reqbufs(struct file *file, void *__fh, struct v4l2_requestbuffers *b) 887 { 888 struct saa7146_fh *fh = __fh; 889 890 if (b->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) 891 return videobuf_reqbufs(&fh->video_q, b); 892 if (b->type == V4L2_BUF_TYPE_VBI_CAPTURE) 893 return videobuf_reqbufs(&fh->vbi_q, b); 894 return -EINVAL; 895 } 896 897 static int vidioc_querybuf(struct file *file, void *__fh, struct v4l2_buffer *buf) 898 { 899 struct saa7146_fh *fh = __fh; 900 901 if (buf->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) 902 return videobuf_querybuf(&fh->video_q, buf); 903 if (buf->type == V4L2_BUF_TYPE_VBI_CAPTURE) 904 return videobuf_querybuf(&fh->vbi_q, buf); 905 return -EINVAL; 906 } 907 908 static int vidioc_qbuf(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_qbuf(&fh->video_q, buf); 914 if (buf->type == V4L2_BUF_TYPE_VBI_CAPTURE) 915 return videobuf_qbuf(&fh->vbi_q, buf); 916 return -EINVAL; 917 } 918 919 static int vidioc_dqbuf(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_dqbuf(&fh->video_q, buf, file->f_flags & O_NONBLOCK); 925 if (buf->type == V4L2_BUF_TYPE_VBI_CAPTURE) 926 return videobuf_dqbuf(&fh->vbi_q, buf, file->f_flags & O_NONBLOCK); 927 return -EINVAL; 928 } 929 930 static int vidioc_streamon(struct file *file, void *__fh, enum v4l2_buf_type type) 931 { 932 struct saa7146_fh *fh = __fh; 933 int err; 934 935 DEB_D("VIDIOC_STREAMON, type:%d\n", type); 936 937 err = video_begin(fh); 938 if (err) 939 return err; 940 if (type == V4L2_BUF_TYPE_VIDEO_CAPTURE) 941 return videobuf_streamon(&fh->video_q); 942 if (type == V4L2_BUF_TYPE_VBI_CAPTURE) 943 return videobuf_streamon(&fh->vbi_q); 944 return -EINVAL; 945 } 946 947 static int vidioc_streamoff(struct file *file, void *__fh, enum v4l2_buf_type type) 948 { 949 struct saa7146_fh *fh = __fh; 950 struct saa7146_dev *dev = fh->dev; 951 struct saa7146_vv *vv = dev->vv_data; 952 int err; 953 954 DEB_D("VIDIOC_STREAMOFF, type:%d\n", type); 955 956 /* ugly: we need to copy some checks from video_end(), 957 because videobuf_streamoff() relies on the capture running. 958 check and fix this */ 959 if ((vv->video_status & STATUS_CAPTURE) != STATUS_CAPTURE) { 960 DEB_S("not capturing\n"); 961 return 0; 962 } 963 964 if (vv->video_fh != fh) { 965 DEB_S("capturing, but in another open\n"); 966 return -EBUSY; 967 } 968 969 err = -EINVAL; 970 if (type == V4L2_BUF_TYPE_VIDEO_CAPTURE) 971 err = videobuf_streamoff(&fh->video_q); 972 else if (type == V4L2_BUF_TYPE_VBI_CAPTURE) 973 err = videobuf_streamoff(&fh->vbi_q); 974 if (0 != err) { 975 DEB_D("warning: videobuf_streamoff() failed\n"); 976 video_end(fh, file); 977 } else { 978 err = video_end(fh, file); 979 } 980 return err; 981 } 982 983 const struct v4l2_ioctl_ops saa7146_video_ioctl_ops = { 984 .vidioc_querycap = vidioc_querycap, 985 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, 986 .vidioc_enum_fmt_vid_overlay = vidioc_enum_fmt_vid_cap, 987 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap, 988 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap, 989 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, 990 .vidioc_g_fmt_vid_overlay = vidioc_g_fmt_vid_overlay, 991 .vidioc_try_fmt_vid_overlay = vidioc_try_fmt_vid_overlay, 992 .vidioc_s_fmt_vid_overlay = vidioc_s_fmt_vid_overlay, 993 994 .vidioc_overlay = vidioc_overlay, 995 .vidioc_g_fbuf = vidioc_g_fbuf, 996 .vidioc_s_fbuf = vidioc_s_fbuf, 997 .vidioc_reqbufs = vidioc_reqbufs, 998 .vidioc_querybuf = vidioc_querybuf, 999 .vidioc_qbuf = vidioc_qbuf, 1000 .vidioc_dqbuf = vidioc_dqbuf, 1001 .vidioc_g_std = vidioc_g_std, 1002 .vidioc_s_std = vidioc_s_std, 1003 .vidioc_streamon = vidioc_streamon, 1004 .vidioc_streamoff = vidioc_streamoff, 1005 .vidioc_g_parm = vidioc_g_parm, 1006 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, 1007 .vidioc_unsubscribe_event = v4l2_event_unsubscribe, 1008 }; 1009 1010 const struct v4l2_ioctl_ops saa7146_vbi_ioctl_ops = { 1011 .vidioc_querycap = vidioc_querycap, 1012 .vidioc_g_fmt_vbi_cap = vidioc_g_fmt_vbi_cap, 1013 1014 .vidioc_reqbufs = vidioc_reqbufs, 1015 .vidioc_querybuf = vidioc_querybuf, 1016 .vidioc_qbuf = vidioc_qbuf, 1017 .vidioc_dqbuf = vidioc_dqbuf, 1018 .vidioc_g_std = vidioc_g_std, 1019 .vidioc_s_std = vidioc_s_std, 1020 .vidioc_streamon = vidioc_streamon, 1021 .vidioc_streamoff = vidioc_streamoff, 1022 .vidioc_g_parm = vidioc_g_parm, 1023 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, 1024 .vidioc_unsubscribe_event = v4l2_event_unsubscribe, 1025 }; 1026 1027 /*********************************************************************************/ 1028 /* buffer handling functions */ 1029 1030 static int buffer_activate (struct saa7146_dev *dev, 1031 struct saa7146_buf *buf, 1032 struct saa7146_buf *next) 1033 { 1034 struct saa7146_vv *vv = dev->vv_data; 1035 1036 buf->vb.state = VIDEOBUF_ACTIVE; 1037 saa7146_set_capture(dev,buf,next); 1038 1039 mod_timer(&vv->video_dmaq.timeout, jiffies+BUFFER_TIMEOUT); 1040 return 0; 1041 } 1042 1043 static void release_all_pagetables(struct saa7146_dev *dev, struct saa7146_buf *buf) 1044 { 1045 saa7146_pgtable_free(dev->pci, &buf->pt[0]); 1046 saa7146_pgtable_free(dev->pci, &buf->pt[1]); 1047 saa7146_pgtable_free(dev->pci, &buf->pt[2]); 1048 } 1049 1050 static int buffer_prepare(struct videobuf_queue *q, 1051 struct videobuf_buffer *vb, enum v4l2_field field) 1052 { 1053 struct file *file = q->priv_data; 1054 struct saa7146_fh *fh = file->private_data; 1055 struct saa7146_dev *dev = fh->dev; 1056 struct saa7146_vv *vv = dev->vv_data; 1057 struct saa7146_buf *buf = (struct saa7146_buf *)vb; 1058 int size,err = 0; 1059 1060 DEB_CAP("vbuf:%p\n", vb); 1061 1062 /* sanity checks */ 1063 if (vv->video_fmt.width < 48 || 1064 vv->video_fmt.height < 32 || 1065 vv->video_fmt.width > vv->standard->h_max_out || 1066 vv->video_fmt.height > vv->standard->v_max_out) { 1067 DEB_D("w (%d) / h (%d) out of bounds\n", 1068 vv->video_fmt.width, vv->video_fmt.height); 1069 return -EINVAL; 1070 } 1071 1072 size = vv->video_fmt.sizeimage; 1073 if (0 != buf->vb.baddr && buf->vb.bsize < size) { 1074 DEB_D("size mismatch\n"); 1075 return -EINVAL; 1076 } 1077 1078 DEB_CAP("buffer_prepare [size=%dx%d,bytes=%d,fields=%s]\n", 1079 vv->video_fmt.width, vv->video_fmt.height, 1080 size, v4l2_field_names[vv->video_fmt.field]); 1081 if (buf->vb.width != vv->video_fmt.width || 1082 buf->vb.bytesperline != vv->video_fmt.bytesperline || 1083 buf->vb.height != vv->video_fmt.height || 1084 buf->vb.size != size || 1085 buf->vb.field != field || 1086 buf->vb.field != vv->video_fmt.field || 1087 buf->fmt != &vv->video_fmt) { 1088 saa7146_dma_free(dev,q,buf); 1089 } 1090 1091 if (VIDEOBUF_NEEDS_INIT == buf->vb.state) { 1092 struct saa7146_format *sfmt; 1093 1094 buf->vb.bytesperline = vv->video_fmt.bytesperline; 1095 buf->vb.width = vv->video_fmt.width; 1096 buf->vb.height = vv->video_fmt.height; 1097 buf->vb.size = size; 1098 buf->vb.field = field; 1099 buf->fmt = &vv->video_fmt; 1100 buf->vb.field = vv->video_fmt.field; 1101 1102 sfmt = saa7146_format_by_fourcc(dev,buf->fmt->pixelformat); 1103 1104 release_all_pagetables(dev, buf); 1105 if( 0 != IS_PLANAR(sfmt->trans)) { 1106 saa7146_pgtable_alloc(dev->pci, &buf->pt[0]); 1107 saa7146_pgtable_alloc(dev->pci, &buf->pt[1]); 1108 saa7146_pgtable_alloc(dev->pci, &buf->pt[2]); 1109 } else { 1110 saa7146_pgtable_alloc(dev->pci, &buf->pt[0]); 1111 } 1112 1113 err = videobuf_iolock(q,&buf->vb, &vv->ov_fb); 1114 if (err) 1115 goto oops; 1116 err = saa7146_pgtable_build(dev,buf); 1117 if (err) 1118 goto oops; 1119 } 1120 buf->vb.state = VIDEOBUF_PREPARED; 1121 buf->activate = buffer_activate; 1122 1123 return 0; 1124 1125 oops: 1126 DEB_D("error out\n"); 1127 saa7146_dma_free(dev,q,buf); 1128 1129 return err; 1130 } 1131 1132 static int buffer_setup(struct videobuf_queue *q, unsigned int *count, unsigned int *size) 1133 { 1134 struct file *file = q->priv_data; 1135 struct saa7146_fh *fh = file->private_data; 1136 struct saa7146_vv *vv = fh->dev->vv_data; 1137 1138 if (0 == *count || *count > MAX_SAA7146_CAPTURE_BUFFERS) 1139 *count = MAX_SAA7146_CAPTURE_BUFFERS; 1140 1141 *size = vv->video_fmt.sizeimage; 1142 1143 /* check if we exceed the "max_memory" parameter */ 1144 if( (*count * *size) > (max_memory*1048576) ) { 1145 *count = (max_memory*1048576) / *size; 1146 } 1147 1148 DEB_CAP("%d buffers, %d bytes each\n", *count, *size); 1149 1150 return 0; 1151 } 1152 1153 static void buffer_queue(struct videobuf_queue *q, struct videobuf_buffer *vb) 1154 { 1155 struct file *file = q->priv_data; 1156 struct saa7146_fh *fh = file->private_data; 1157 struct saa7146_dev *dev = fh->dev; 1158 struct saa7146_vv *vv = dev->vv_data; 1159 struct saa7146_buf *buf = (struct saa7146_buf *)vb; 1160 1161 DEB_CAP("vbuf:%p\n", vb); 1162 saa7146_buffer_queue(fh->dev, &vv->video_dmaq, buf); 1163 } 1164 1165 static void buffer_release(struct videobuf_queue *q, struct videobuf_buffer *vb) 1166 { 1167 struct file *file = q->priv_data; 1168 struct saa7146_fh *fh = file->private_data; 1169 struct saa7146_dev *dev = fh->dev; 1170 struct saa7146_buf *buf = (struct saa7146_buf *)vb; 1171 1172 DEB_CAP("vbuf:%p\n", vb); 1173 1174 saa7146_dma_free(dev,q,buf); 1175 1176 release_all_pagetables(dev, buf); 1177 } 1178 1179 static const struct videobuf_queue_ops video_qops = { 1180 .buf_setup = buffer_setup, 1181 .buf_prepare = buffer_prepare, 1182 .buf_queue = buffer_queue, 1183 .buf_release = buffer_release, 1184 }; 1185 1186 /********************************************************************************/ 1187 /* file operations */ 1188 1189 static void video_init(struct saa7146_dev *dev, struct saa7146_vv *vv) 1190 { 1191 INIT_LIST_HEAD(&vv->video_dmaq.queue); 1192 1193 timer_setup(&vv->video_dmaq.timeout, saa7146_buffer_timeout, 0); 1194 vv->video_dmaq.dev = dev; 1195 1196 /* set some default values */ 1197 vv->standard = &dev->ext_vv_data->stds[0]; 1198 1199 /* FIXME: what's this? */ 1200 vv->current_hps_source = SAA7146_HPS_SOURCE_PORT_A; 1201 vv->current_hps_sync = SAA7146_HPS_SYNC_PORT_A; 1202 } 1203 1204 1205 static int video_open(struct saa7146_dev *dev, struct file *file) 1206 { 1207 struct saa7146_fh *fh = file->private_data; 1208 1209 videobuf_queue_sg_init(&fh->video_q, &video_qops, 1210 &dev->pci->dev, &dev->slock, 1211 V4L2_BUF_TYPE_VIDEO_CAPTURE, 1212 V4L2_FIELD_INTERLACED, 1213 sizeof(struct saa7146_buf), 1214 file, &dev->v4l2_lock); 1215 1216 return 0; 1217 } 1218 1219 1220 static void video_close(struct saa7146_dev *dev, struct file *file) 1221 { 1222 struct saa7146_fh *fh = file->private_data; 1223 struct saa7146_vv *vv = dev->vv_data; 1224 struct videobuf_queue *q = &fh->video_q; 1225 1226 if (IS_CAPTURE_ACTIVE(fh) != 0) 1227 video_end(fh, file); 1228 else if (IS_OVERLAY_ACTIVE(fh) != 0) 1229 saa7146_stop_preview(fh); 1230 1231 videobuf_stop(q); 1232 /* hmm, why is this function declared void? */ 1233 } 1234 1235 1236 static void video_irq_done(struct saa7146_dev *dev, unsigned long st) 1237 { 1238 struct saa7146_vv *vv = dev->vv_data; 1239 struct saa7146_dmaqueue *q = &vv->video_dmaq; 1240 1241 spin_lock(&dev->slock); 1242 DEB_CAP("called\n"); 1243 1244 /* only finish the buffer if we have one... */ 1245 if( NULL != q->curr ) { 1246 saa7146_buffer_finish(dev,q,VIDEOBUF_DONE); 1247 } 1248 saa7146_buffer_next(dev,q,0); 1249 1250 spin_unlock(&dev->slock); 1251 } 1252 1253 static ssize_t video_read(struct file *file, char __user *data, size_t count, loff_t *ppos) 1254 { 1255 struct saa7146_fh *fh = file->private_data; 1256 struct saa7146_dev *dev = fh->dev; 1257 struct saa7146_vv *vv = dev->vv_data; 1258 ssize_t ret = 0; 1259 1260 DEB_EE("called\n"); 1261 1262 if ((vv->video_status & STATUS_CAPTURE) != 0) { 1263 /* fixme: should we allow read() captures while streaming capture? */ 1264 if (vv->video_fh == fh) { 1265 DEB_S("already capturing\n"); 1266 return -EBUSY; 1267 } 1268 DEB_S("already capturing in another open\n"); 1269 return -EBUSY; 1270 } 1271 1272 ret = video_begin(fh); 1273 if( 0 != ret) { 1274 goto out; 1275 } 1276 1277 ret = videobuf_read_one(&fh->video_q , data, count, ppos, 1278 file->f_flags & O_NONBLOCK); 1279 if (ret != 0) { 1280 video_end(fh, file); 1281 } else { 1282 ret = video_end(fh, file); 1283 } 1284 out: 1285 /* restart overlay if it was active before */ 1286 if (vv->ov_suspend != NULL) { 1287 saa7146_start_preview(vv->ov_suspend); 1288 vv->ov_suspend = NULL; 1289 } 1290 1291 return ret; 1292 } 1293 1294 const struct saa7146_use_ops saa7146_video_uops = { 1295 .init = video_init, 1296 .open = video_open, 1297 .release = video_close, 1298 .irq_done = video_irq_done, 1299 .read = video_read, 1300 }; 1301