1#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 2 3#include <media/saa7146_vv.h> 4#include <media/v4l2-event.h> 5#include <media/v4l2-ctrls.h> 6#include <linux/module.h> 7 8static int max_memory = 32; 9 10module_param(max_memory, int, 0644); 11MODULE_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 */ 20static 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 89static int NUM_FORMATS = sizeof(formats)/sizeof(struct saa7146_format); 90 91struct 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 105static int vidioc_try_fmt_vid_overlay(struct file *file, void *fh, struct v4l2_format *f); 106 107int 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} 167EXPORT_SYMBOL_GPL(saa7146_start_preview); 168 169int 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} 202EXPORT_SYMBOL_GPL(saa7146_stop_preview); 203 204/********************************************************************************/ 205/* common pagetable functions */ 206 207static 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 328static 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 389static 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_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 spin_unlock_irqrestore(&dev->slock, flags); 432 433 vv->video_fh = NULL; 434 vv->video_status = 0; 435 436 saa7146_res_free(fh, resource); 437 438 if (vv->ov_suspend != NULL) { 439 saa7146_start_preview(vv->ov_suspend); 440 vv->ov_suspend = NULL; 441 } 442 443 return 0; 444} 445 446static int vidioc_querycap(struct file *file, void *fh, struct v4l2_capability *cap) 447{ 448 struct video_device *vdev = video_devdata(file); 449 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev; 450 451 strcpy((char *)cap->driver, "saa7146 v4l2"); 452 strlcpy((char *)cap->card, dev->ext->name, sizeof(cap->card)); 453 sprintf((char *)cap->bus_info, "PCI:%s", pci_name(dev->pci)); 454 cap->device_caps = 455 V4L2_CAP_VIDEO_CAPTURE | 456 V4L2_CAP_VIDEO_OVERLAY | 457 V4L2_CAP_READWRITE | 458 V4L2_CAP_STREAMING; 459 cap->device_caps |= dev->ext_vv_data->capabilities; 460 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS; 461 if (vdev->vfl_type == VFL_TYPE_GRABBER) 462 cap->device_caps &= 463 ~(V4L2_CAP_VBI_CAPTURE | V4L2_CAP_SLICED_VBI_OUTPUT); 464 else 465 cap->device_caps &= 466 ~(V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OVERLAY | V4L2_CAP_AUDIO); 467 return 0; 468} 469 470static int vidioc_g_fbuf(struct file *file, void *fh, struct v4l2_framebuffer *fb) 471{ 472 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev; 473 struct saa7146_vv *vv = dev->vv_data; 474 475 *fb = vv->ov_fb; 476 fb->capability = V4L2_FBUF_CAP_LIST_CLIPPING; 477 fb->flags = V4L2_FBUF_FLAG_PRIMARY; 478 return 0; 479} 480 481static int vidioc_s_fbuf(struct file *file, void *fh, const struct v4l2_framebuffer *fb) 482{ 483 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev; 484 struct saa7146_vv *vv = dev->vv_data; 485 struct saa7146_format *fmt; 486 487 DEB_EE("VIDIOC_S_FBUF\n"); 488 489 if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO)) 490 return -EPERM; 491 492 /* check args */ 493 fmt = saa7146_format_by_fourcc(dev, fb->fmt.pixelformat); 494 if (NULL == fmt) 495 return -EINVAL; 496 497 /* planar formats are not allowed for overlay video, clipping and video dma would clash */ 498 if (fmt->flags & FORMAT_IS_PLANAR) 499 DEB_S("planar pixelformat '%4.4s' not allowed for overlay\n", 500 (char *)&fmt->pixelformat); 501 502 /* check if overlay is running */ 503 if (IS_OVERLAY_ACTIVE(fh) != 0) { 504 if (vv->video_fh != fh) { 505 DEB_D("refusing to change framebuffer informations while overlay is active in another open\n"); 506 return -EBUSY; 507 } 508 } 509 510 /* ok, accept it */ 511 vv->ov_fb = *fb; 512 vv->ov_fmt = fmt; 513 514 if (vv->ov_fb.fmt.bytesperline < vv->ov_fb.fmt.width) { 515 vv->ov_fb.fmt.bytesperline = vv->ov_fb.fmt.width * fmt->depth / 8; 516 DEB_D("setting bytesperline to %d\n", vv->ov_fb.fmt.bytesperline); 517 } 518 return 0; 519} 520 521static int vidioc_enum_fmt_vid_cap(struct file *file, void *fh, struct v4l2_fmtdesc *f) 522{ 523 if (f->index >= NUM_FORMATS) 524 return -EINVAL; 525 strlcpy((char *)f->description, formats[f->index].name, 526 sizeof(f->description)); 527 f->pixelformat = formats[f->index].pixelformat; 528 return 0; 529} 530 531int saa7146_s_ctrl(struct v4l2_ctrl *ctrl) 532{ 533 struct saa7146_dev *dev = container_of(ctrl->handler, 534 struct saa7146_dev, ctrl_handler); 535 struct saa7146_vv *vv = dev->vv_data; 536 u32 val; 537 538 switch (ctrl->id) { 539 case V4L2_CID_BRIGHTNESS: 540 val = saa7146_read(dev, BCS_CTRL); 541 val &= 0x00ffffff; 542 val |= (ctrl->val << 24); 543 saa7146_write(dev, BCS_CTRL, val); 544 saa7146_write(dev, MC2, MASK_22 | MASK_06); 545 break; 546 547 case V4L2_CID_CONTRAST: 548 val = saa7146_read(dev, BCS_CTRL); 549 val &= 0xff00ffff; 550 val |= (ctrl->val << 16); 551 saa7146_write(dev, BCS_CTRL, val); 552 saa7146_write(dev, MC2, MASK_22 | MASK_06); 553 break; 554 555 case V4L2_CID_SATURATION: 556 val = saa7146_read(dev, BCS_CTRL); 557 val &= 0xffffff00; 558 val |= (ctrl->val << 0); 559 saa7146_write(dev, BCS_CTRL, val); 560 saa7146_write(dev, MC2, MASK_22 | MASK_06); 561 break; 562 563 case V4L2_CID_HFLIP: 564 /* fixme: we can support changing VFLIP and HFLIP here... */ 565 if ((vv->video_status & STATUS_CAPTURE)) 566 return -EBUSY; 567 vv->hflip = ctrl->val; 568 break; 569 570 case V4L2_CID_VFLIP: 571 if ((vv->video_status & STATUS_CAPTURE)) 572 return -EBUSY; 573 vv->vflip = ctrl->val; 574 break; 575 576 default: 577 return -EINVAL; 578 } 579 580 if ((vv->video_status & STATUS_OVERLAY) != 0) { /* CHECK: && (vv->video_fh == fh)) */ 581 struct saa7146_fh *fh = vv->video_fh; 582 583 saa7146_stop_preview(fh); 584 saa7146_start_preview(fh); 585 } 586 return 0; 587} 588 589static int vidioc_g_parm(struct file *file, void *fh, 590 struct v4l2_streamparm *parm) 591{ 592 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev; 593 struct saa7146_vv *vv = dev->vv_data; 594 595 if (parm->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) 596 return -EINVAL; 597 parm->parm.capture.readbuffers = 1; 598 v4l2_video_std_frame_period(vv->standard->id, 599 &parm->parm.capture.timeperframe); 600 return 0; 601} 602 603static int vidioc_g_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *f) 604{ 605 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev; 606 struct saa7146_vv *vv = dev->vv_data; 607 608 f->fmt.pix = vv->video_fmt; 609 return 0; 610} 611 612static int vidioc_g_fmt_vid_overlay(struct file *file, void *fh, struct v4l2_format *f) 613{ 614 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev; 615 struct saa7146_vv *vv = dev->vv_data; 616 617 f->fmt.win = vv->ov.win; 618 return 0; 619} 620 621static int vidioc_g_fmt_vbi_cap(struct file *file, void *fh, struct v4l2_format *f) 622{ 623 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev; 624 struct saa7146_vv *vv = dev->vv_data; 625 626 f->fmt.vbi = vv->vbi_fmt; 627 return 0; 628} 629 630static int vidioc_try_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *f) 631{ 632 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev; 633 struct saa7146_vv *vv = dev->vv_data; 634 struct saa7146_format *fmt; 635 enum v4l2_field field; 636 int maxw, maxh; 637 int calc_bpl; 638 639 DEB_EE("V4L2_BUF_TYPE_VIDEO_CAPTURE: dev:%p, fh:%p\n", dev, fh); 640 641 fmt = saa7146_format_by_fourcc(dev, f->fmt.pix.pixelformat); 642 if (NULL == fmt) 643 return -EINVAL; 644 645 field = f->fmt.pix.field; 646 maxw = vv->standard->h_max_out; 647 maxh = vv->standard->v_max_out; 648 649 if (V4L2_FIELD_ANY == field) { 650 field = (f->fmt.pix.height > maxh / 2) 651 ? V4L2_FIELD_INTERLACED 652 : V4L2_FIELD_BOTTOM; 653 } 654 switch (field) { 655 case V4L2_FIELD_ALTERNATE: 656 vv->last_field = V4L2_FIELD_TOP; 657 maxh = maxh / 2; 658 break; 659 case V4L2_FIELD_TOP: 660 case V4L2_FIELD_BOTTOM: 661 vv->last_field = V4L2_FIELD_INTERLACED; 662 maxh = maxh / 2; 663 break; 664 case V4L2_FIELD_INTERLACED: 665 vv->last_field = V4L2_FIELD_INTERLACED; 666 break; 667 default: 668 DEB_D("no known field mode '%d'\n", field); 669 return -EINVAL; 670 } 671 672 f->fmt.pix.field = field; 673 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M; 674 if (f->fmt.pix.width > maxw) 675 f->fmt.pix.width = maxw; 676 if (f->fmt.pix.height > maxh) 677 f->fmt.pix.height = maxh; 678 679 calc_bpl = (f->fmt.pix.width * fmt->depth) / 8; 680 681 if (f->fmt.pix.bytesperline < calc_bpl) 682 f->fmt.pix.bytesperline = calc_bpl; 683 684 if (f->fmt.pix.bytesperline > (2 * PAGE_SIZE * fmt->depth) / 8) /* arbitrary constraint */ 685 f->fmt.pix.bytesperline = calc_bpl; 686 687 f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * f->fmt.pix.height; 688 DEB_D("w:%d, h:%d, bytesperline:%d, sizeimage:%d\n", 689 f->fmt.pix.width, f->fmt.pix.height, 690 f->fmt.pix.bytesperline, f->fmt.pix.sizeimage); 691 692 return 0; 693} 694 695 696static int vidioc_try_fmt_vid_overlay(struct file *file, void *fh, struct v4l2_format *f) 697{ 698 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev; 699 struct saa7146_vv *vv = dev->vv_data; 700 struct v4l2_window *win = &f->fmt.win; 701 enum v4l2_field field; 702 int maxw, maxh; 703 704 DEB_EE("dev:%p\n", dev); 705 706 if (NULL == vv->ov_fb.base) { 707 DEB_D("no fb base set\n"); 708 return -EINVAL; 709 } 710 if (NULL == vv->ov_fmt) { 711 DEB_D("no fb fmt set\n"); 712 return -EINVAL; 713 } 714 if (win->w.width < 48 || win->w.height < 32) { 715 DEB_D("min width/height. (%d,%d)\n", 716 win->w.width, win->w.height); 717 return -EINVAL; 718 } 719 if (win->clipcount > 16) { 720 DEB_D("clipcount too big\n"); 721 return -EINVAL; 722 } 723 724 field = win->field; 725 maxw = vv->standard->h_max_out; 726 maxh = vv->standard->v_max_out; 727 728 if (V4L2_FIELD_ANY == field) { 729 field = (win->w.height > maxh / 2) 730 ? V4L2_FIELD_INTERLACED 731 : V4L2_FIELD_TOP; 732 } 733 switch (field) { 734 case V4L2_FIELD_TOP: 735 case V4L2_FIELD_BOTTOM: 736 case V4L2_FIELD_ALTERNATE: 737 maxh = maxh / 2; 738 break; 739 case V4L2_FIELD_INTERLACED: 740 break; 741 default: 742 DEB_D("no known field mode '%d'\n", field); 743 return -EINVAL; 744 } 745 746 win->field = field; 747 if (win->w.width > maxw) 748 win->w.width = maxw; 749 if (win->w.height > maxh) 750 win->w.height = maxh; 751 752 return 0; 753} 754 755static int vidioc_s_fmt_vid_cap(struct file *file, void *__fh, struct v4l2_format *f) 756{ 757 struct saa7146_fh *fh = __fh; 758 struct saa7146_dev *dev = fh->dev; 759 struct saa7146_vv *vv = dev->vv_data; 760 int err; 761 762 DEB_EE("V4L2_BUF_TYPE_VIDEO_CAPTURE: dev:%p, fh:%p\n", dev, fh); 763 if (IS_CAPTURE_ACTIVE(fh) != 0) { 764 DEB_EE("streaming capture is active\n"); 765 return -EBUSY; 766 } 767 err = vidioc_try_fmt_vid_cap(file, fh, f); 768 if (0 != err) 769 return err; 770 vv->video_fmt = f->fmt.pix; 771 DEB_EE("set to pixelformat '%4.4s'\n", 772 (char *)&vv->video_fmt.pixelformat); 773 return 0; 774} 775 776static int vidioc_s_fmt_vid_overlay(struct file *file, void *__fh, struct v4l2_format *f) 777{ 778 struct saa7146_fh *fh = __fh; 779 struct saa7146_dev *dev = fh->dev; 780 struct saa7146_vv *vv = dev->vv_data; 781 int err; 782 783 DEB_EE("V4L2_BUF_TYPE_VIDEO_OVERLAY: dev:%p, fh:%p\n", dev, fh); 784 err = vidioc_try_fmt_vid_overlay(file, fh, f); 785 if (0 != err) 786 return err; 787 vv->ov.win = f->fmt.win; 788 vv->ov.nclips = f->fmt.win.clipcount; 789 if (vv->ov.nclips > 16) 790 vv->ov.nclips = 16; 791 if (copy_from_user(vv->ov.clips, f->fmt.win.clips, 792 sizeof(struct v4l2_clip) * vv->ov.nclips)) { 793 return -EFAULT; 794 } 795 796 /* vv->ov.fh is used to indicate that we have valid overlay informations, too */ 797 vv->ov.fh = fh; 798 799 /* check if our current overlay is active */ 800 if (IS_OVERLAY_ACTIVE(fh) != 0) { 801 saa7146_stop_preview(fh); 802 saa7146_start_preview(fh); 803 } 804 return 0; 805} 806 807static int vidioc_g_std(struct file *file, void *fh, v4l2_std_id *norm) 808{ 809 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev; 810 struct saa7146_vv *vv = dev->vv_data; 811 812 *norm = vv->standard->id; 813 return 0; 814} 815 816 /* the saa7146 supfhrts (used in conjunction with the saa7111a for example) 817 PAL / NTSC / SECAM. if your hardware does not (or does more) 818 -- override this function in your extension */ 819/* 820 case VIDIOC_ENUMSTD: 821 { 822 struct v4l2_standard *e = arg; 823 if (e->index < 0 ) 824 return -EINVAL; 825 if( e->index < dev->ext_vv_data->num_stds ) { 826 DEB_EE("VIDIOC_ENUMSTD: index:%d\n", e->index); 827 v4l2_video_std_construct(e, dev->ext_vv_data->stds[e->index].id, dev->ext_vv_data->stds[e->index].name); 828 return 0; 829 } 830 return -EINVAL; 831 } 832 */ 833 834static int vidioc_s_std(struct file *file, void *fh, v4l2_std_id id) 835{ 836 struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev; 837 struct saa7146_vv *vv = dev->vv_data; 838 int found = 0; 839 int err, i; 840 841 DEB_EE("VIDIOC_S_STD\n"); 842 843 if ((vv->video_status & STATUS_CAPTURE) == STATUS_CAPTURE) { 844 DEB_D("cannot change video standard while streaming capture is active\n"); 845 return -EBUSY; 846 } 847 848 if ((vv->video_status & STATUS_OVERLAY) != 0) { 849 vv->ov_suspend = vv->video_fh; 850 err = saa7146_stop_preview(vv->video_fh); /* side effect: video_status is now 0, video_fh is NULL */ 851 if (0 != err) { 852 DEB_D("suspending video failed. aborting\n"); 853 return err; 854 } 855 } 856 857 for (i = 0; i < dev->ext_vv_data->num_stds; i++) 858 if (id & dev->ext_vv_data->stds[i].id) 859 break; 860 if (i != dev->ext_vv_data->num_stds) { 861 vv->standard = &dev->ext_vv_data->stds[i]; 862 if (NULL != dev->ext_vv_data->std_callback) 863 dev->ext_vv_data->std_callback(dev, vv->standard); 864 found = 1; 865 } 866 867 if (vv->ov_suspend != NULL) { 868 saa7146_start_preview(vv->ov_suspend); 869 vv->ov_suspend = NULL; 870 } 871 872 if (!found) { 873 DEB_EE("VIDIOC_S_STD: standard not found\n"); 874 return -EINVAL; 875 } 876 877 DEB_EE("VIDIOC_S_STD: set to standard to '%s'\n", vv->standard->name); 878 return 0; 879} 880 881static int vidioc_overlay(struct file *file, void *fh, unsigned int on) 882{ 883 int err; 884 885 DEB_D("VIDIOC_OVERLAY on:%d\n", on); 886 if (on) 887 err = saa7146_start_preview(fh); 888 else 889 err = saa7146_stop_preview(fh); 890 return err; 891} 892 893static int vidioc_reqbufs(struct file *file, void *__fh, struct v4l2_requestbuffers *b) 894{ 895 struct saa7146_fh *fh = __fh; 896 897 if (b->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) 898 return videobuf_reqbufs(&fh->video_q, b); 899 if (b->type == V4L2_BUF_TYPE_VBI_CAPTURE) 900 return videobuf_reqbufs(&fh->vbi_q, b); 901 return -EINVAL; 902} 903 904static int vidioc_querybuf(struct file *file, void *__fh, struct v4l2_buffer *buf) 905{ 906 struct saa7146_fh *fh = __fh; 907 908 if (buf->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) 909 return videobuf_querybuf(&fh->video_q, buf); 910 if (buf->type == V4L2_BUF_TYPE_VBI_CAPTURE) 911 return videobuf_querybuf(&fh->vbi_q, buf); 912 return -EINVAL; 913} 914 915static int vidioc_qbuf(struct file *file, void *__fh, struct v4l2_buffer *buf) 916{ 917 struct saa7146_fh *fh = __fh; 918 919 if (buf->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) 920 return videobuf_qbuf(&fh->video_q, buf); 921 if (buf->type == V4L2_BUF_TYPE_VBI_CAPTURE) 922 return videobuf_qbuf(&fh->vbi_q, buf); 923 return -EINVAL; 924} 925 926static int vidioc_dqbuf(struct file *file, void *__fh, struct v4l2_buffer *buf) 927{ 928 struct saa7146_fh *fh = __fh; 929 930 if (buf->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) 931 return videobuf_dqbuf(&fh->video_q, buf, file->f_flags & O_NONBLOCK); 932 if (buf->type == V4L2_BUF_TYPE_VBI_CAPTURE) 933 return videobuf_dqbuf(&fh->vbi_q, buf, file->f_flags & O_NONBLOCK); 934 return -EINVAL; 935} 936 937static int vidioc_streamon(struct file *file, void *__fh, enum v4l2_buf_type type) 938{ 939 struct saa7146_fh *fh = __fh; 940 int err; 941 942 DEB_D("VIDIOC_STREAMON, type:%d\n", type); 943 944 err = video_begin(fh); 945 if (err) 946 return err; 947 if (type == V4L2_BUF_TYPE_VIDEO_CAPTURE) 948 return videobuf_streamon(&fh->video_q); 949 if (type == V4L2_BUF_TYPE_VBI_CAPTURE) 950 return videobuf_streamon(&fh->vbi_q); 951 return -EINVAL; 952} 953 954static int vidioc_streamoff(struct file *file, void *__fh, enum v4l2_buf_type type) 955{ 956 struct saa7146_fh *fh = __fh; 957 struct saa7146_dev *dev = fh->dev; 958 struct saa7146_vv *vv = dev->vv_data; 959 int err; 960 961 DEB_D("VIDIOC_STREAMOFF, type:%d\n", type); 962 963 /* ugly: we need to copy some checks from video_end(), 964 because videobuf_streamoff() relies on the capture running. 965 check and fix this */ 966 if ((vv->video_status & STATUS_CAPTURE) != STATUS_CAPTURE) { 967 DEB_S("not capturing\n"); 968 return 0; 969 } 970 971 if (vv->video_fh != fh) { 972 DEB_S("capturing, but in another open\n"); 973 return -EBUSY; 974 } 975 976 err = -EINVAL; 977 if (type == V4L2_BUF_TYPE_VIDEO_CAPTURE) 978 err = videobuf_streamoff(&fh->video_q); 979 else if (type == V4L2_BUF_TYPE_VBI_CAPTURE) 980 err = videobuf_streamoff(&fh->vbi_q); 981 if (0 != err) { 982 DEB_D("warning: videobuf_streamoff() failed\n"); 983 video_end(fh, file); 984 } else { 985 err = video_end(fh, file); 986 } 987 return err; 988} 989 990const struct v4l2_ioctl_ops saa7146_video_ioctl_ops = { 991 .vidioc_querycap = vidioc_querycap, 992 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, 993 .vidioc_enum_fmt_vid_overlay = vidioc_enum_fmt_vid_cap, 994 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap, 995 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap, 996 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, 997 .vidioc_g_fmt_vid_overlay = vidioc_g_fmt_vid_overlay, 998 .vidioc_try_fmt_vid_overlay = vidioc_try_fmt_vid_overlay, 999 .vidioc_s_fmt_vid_overlay = vidioc_s_fmt_vid_overlay, 1000 1001 .vidioc_overlay = vidioc_overlay, 1002 .vidioc_g_fbuf = vidioc_g_fbuf, 1003 .vidioc_s_fbuf = vidioc_s_fbuf, 1004 .vidioc_reqbufs = vidioc_reqbufs, 1005 .vidioc_querybuf = vidioc_querybuf, 1006 .vidioc_qbuf = vidioc_qbuf, 1007 .vidioc_dqbuf = vidioc_dqbuf, 1008 .vidioc_g_std = vidioc_g_std, 1009 .vidioc_s_std = vidioc_s_std, 1010 .vidioc_streamon = vidioc_streamon, 1011 .vidioc_streamoff = vidioc_streamoff, 1012 .vidioc_g_parm = vidioc_g_parm, 1013 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, 1014 .vidioc_unsubscribe_event = v4l2_event_unsubscribe, 1015}; 1016 1017const struct v4l2_ioctl_ops saa7146_vbi_ioctl_ops = { 1018 .vidioc_querycap = vidioc_querycap, 1019 .vidioc_g_fmt_vbi_cap = vidioc_g_fmt_vbi_cap, 1020 1021 .vidioc_reqbufs = vidioc_reqbufs, 1022 .vidioc_querybuf = vidioc_querybuf, 1023 .vidioc_qbuf = vidioc_qbuf, 1024 .vidioc_dqbuf = vidioc_dqbuf, 1025 .vidioc_g_std = vidioc_g_std, 1026 .vidioc_s_std = vidioc_s_std, 1027 .vidioc_streamon = vidioc_streamon, 1028 .vidioc_streamoff = vidioc_streamoff, 1029 .vidioc_g_parm = vidioc_g_parm, 1030 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, 1031 .vidioc_unsubscribe_event = v4l2_event_unsubscribe, 1032}; 1033 1034/*********************************************************************************/ 1035/* buffer handling functions */ 1036 1037static int buffer_activate (struct saa7146_dev *dev, 1038 struct saa7146_buf *buf, 1039 struct saa7146_buf *next) 1040{ 1041 struct saa7146_vv *vv = dev->vv_data; 1042 1043 buf->vb.state = VIDEOBUF_ACTIVE; 1044 saa7146_set_capture(dev,buf,next); 1045 1046 mod_timer(&vv->video_dmaq.timeout, jiffies+BUFFER_TIMEOUT); 1047 return 0; 1048} 1049 1050static void release_all_pagetables(struct saa7146_dev *dev, struct saa7146_buf *buf) 1051{ 1052 saa7146_pgtable_free(dev->pci, &buf->pt[0]); 1053 saa7146_pgtable_free(dev->pci, &buf->pt[1]); 1054 saa7146_pgtable_free(dev->pci, &buf->pt[2]); 1055} 1056 1057static int buffer_prepare(struct videobuf_queue *q, 1058 struct videobuf_buffer *vb, enum v4l2_field field) 1059{ 1060 struct file *file = q->priv_data; 1061 struct saa7146_fh *fh = file->private_data; 1062 struct saa7146_dev *dev = fh->dev; 1063 struct saa7146_vv *vv = dev->vv_data; 1064 struct saa7146_buf *buf = (struct saa7146_buf *)vb; 1065 int size,err = 0; 1066 1067 DEB_CAP("vbuf:%p\n", vb); 1068 1069 /* sanity checks */ 1070 if (vv->video_fmt.width < 48 || 1071 vv->video_fmt.height < 32 || 1072 vv->video_fmt.width > vv->standard->h_max_out || 1073 vv->video_fmt.height > vv->standard->v_max_out) { 1074 DEB_D("w (%d) / h (%d) out of bounds\n", 1075 vv->video_fmt.width, vv->video_fmt.height); 1076 return -EINVAL; 1077 } 1078 1079 size = vv->video_fmt.sizeimage; 1080 if (0 != buf->vb.baddr && buf->vb.bsize < size) { 1081 DEB_D("size mismatch\n"); 1082 return -EINVAL; 1083 } 1084 1085 DEB_CAP("buffer_prepare [size=%dx%d,bytes=%d,fields=%s]\n", 1086 vv->video_fmt.width, vv->video_fmt.height, 1087 size, v4l2_field_names[vv->video_fmt.field]); 1088 if (buf->vb.width != vv->video_fmt.width || 1089 buf->vb.bytesperline != vv->video_fmt.bytesperline || 1090 buf->vb.height != vv->video_fmt.height || 1091 buf->vb.size != size || 1092 buf->vb.field != field || 1093 buf->vb.field != vv->video_fmt.field || 1094 buf->fmt != &vv->video_fmt) { 1095 saa7146_dma_free(dev,q,buf); 1096 } 1097 1098 if (VIDEOBUF_NEEDS_INIT == buf->vb.state) { 1099 struct saa7146_format *sfmt; 1100 1101 buf->vb.bytesperline = vv->video_fmt.bytesperline; 1102 buf->vb.width = vv->video_fmt.width; 1103 buf->vb.height = vv->video_fmt.height; 1104 buf->vb.size = size; 1105 buf->vb.field = field; 1106 buf->fmt = &vv->video_fmt; 1107 buf->vb.field = vv->video_fmt.field; 1108 1109 sfmt = saa7146_format_by_fourcc(dev,buf->fmt->pixelformat); 1110 1111 release_all_pagetables(dev, buf); 1112 if( 0 != IS_PLANAR(sfmt->trans)) { 1113 saa7146_pgtable_alloc(dev->pci, &buf->pt[0]); 1114 saa7146_pgtable_alloc(dev->pci, &buf->pt[1]); 1115 saa7146_pgtable_alloc(dev->pci, &buf->pt[2]); 1116 } else { 1117 saa7146_pgtable_alloc(dev->pci, &buf->pt[0]); 1118 } 1119 1120 err = videobuf_iolock(q,&buf->vb, &vv->ov_fb); 1121 if (err) 1122 goto oops; 1123 err = saa7146_pgtable_build(dev,buf); 1124 if (err) 1125 goto oops; 1126 } 1127 buf->vb.state = VIDEOBUF_PREPARED; 1128 buf->activate = buffer_activate; 1129 1130 return 0; 1131 1132 oops: 1133 DEB_D("error out\n"); 1134 saa7146_dma_free(dev,q,buf); 1135 1136 return err; 1137} 1138 1139static int buffer_setup(struct videobuf_queue *q, unsigned int *count, unsigned int *size) 1140{ 1141 struct file *file = q->priv_data; 1142 struct saa7146_fh *fh = file->private_data; 1143 struct saa7146_vv *vv = fh->dev->vv_data; 1144 1145 if (0 == *count || *count > MAX_SAA7146_CAPTURE_BUFFERS) 1146 *count = MAX_SAA7146_CAPTURE_BUFFERS; 1147 1148 *size = vv->video_fmt.sizeimage; 1149 1150 /* check if we exceed the "max_memory" parameter */ 1151 if( (*count * *size) > (max_memory*1048576) ) { 1152 *count = (max_memory*1048576) / *size; 1153 } 1154 1155 DEB_CAP("%d buffers, %d bytes each\n", *count, *size); 1156 1157 return 0; 1158} 1159 1160static void buffer_queue(struct videobuf_queue *q, struct videobuf_buffer *vb) 1161{ 1162 struct file *file = q->priv_data; 1163 struct saa7146_fh *fh = file->private_data; 1164 struct saa7146_dev *dev = fh->dev; 1165 struct saa7146_vv *vv = dev->vv_data; 1166 struct saa7146_buf *buf = (struct saa7146_buf *)vb; 1167 1168 DEB_CAP("vbuf:%p\n", vb); 1169 saa7146_buffer_queue(fh->dev, &vv->video_dmaq, buf); 1170} 1171 1172static void buffer_release(struct videobuf_queue *q, struct videobuf_buffer *vb) 1173{ 1174 struct file *file = q->priv_data; 1175 struct saa7146_fh *fh = file->private_data; 1176 struct saa7146_dev *dev = fh->dev; 1177 struct saa7146_buf *buf = (struct saa7146_buf *)vb; 1178 1179 DEB_CAP("vbuf:%p\n", vb); 1180 1181 saa7146_dma_free(dev,q,buf); 1182 1183 release_all_pagetables(dev, buf); 1184} 1185 1186static struct videobuf_queue_ops video_qops = { 1187 .buf_setup = buffer_setup, 1188 .buf_prepare = buffer_prepare, 1189 .buf_queue = buffer_queue, 1190 .buf_release = buffer_release, 1191}; 1192 1193/********************************************************************************/ 1194/* file operations */ 1195 1196static void video_init(struct saa7146_dev *dev, struct saa7146_vv *vv) 1197{ 1198 INIT_LIST_HEAD(&vv->video_dmaq.queue); 1199 1200 init_timer(&vv->video_dmaq.timeout); 1201 vv->video_dmaq.timeout.function = saa7146_buffer_timeout; 1202 vv->video_dmaq.timeout.data = (unsigned long)(&vv->video_dmaq); 1203 vv->video_dmaq.dev = dev; 1204 1205 /* set some default values */ 1206 vv->standard = &dev->ext_vv_data->stds[0]; 1207 1208 /* FIXME: what's this? */ 1209 vv->current_hps_source = SAA7146_HPS_SOURCE_PORT_A; 1210 vv->current_hps_sync = SAA7146_HPS_SYNC_PORT_A; 1211} 1212 1213 1214static int video_open(struct saa7146_dev *dev, struct file *file) 1215{ 1216 struct saa7146_fh *fh = file->private_data; 1217 1218 videobuf_queue_sg_init(&fh->video_q, &video_qops, 1219 &dev->pci->dev, &dev->slock, 1220 V4L2_BUF_TYPE_VIDEO_CAPTURE, 1221 V4L2_FIELD_INTERLACED, 1222 sizeof(struct saa7146_buf), 1223 file, &dev->v4l2_lock); 1224 1225 return 0; 1226} 1227 1228 1229static void video_close(struct saa7146_dev *dev, struct file *file) 1230{ 1231 struct saa7146_fh *fh = file->private_data; 1232 struct saa7146_vv *vv = dev->vv_data; 1233 struct videobuf_queue *q = &fh->video_q; 1234 1235 if (IS_CAPTURE_ACTIVE(fh) != 0) 1236 video_end(fh, file); 1237 else if (IS_OVERLAY_ACTIVE(fh) != 0) 1238 saa7146_stop_preview(fh); 1239 1240 videobuf_stop(q); 1241 /* hmm, why is this function declared void? */ 1242} 1243 1244 1245static void video_irq_done(struct saa7146_dev *dev, unsigned long st) 1246{ 1247 struct saa7146_vv *vv = dev->vv_data; 1248 struct saa7146_dmaqueue *q = &vv->video_dmaq; 1249 1250 spin_lock(&dev->slock); 1251 DEB_CAP("called\n"); 1252 1253 /* only finish the buffer if we have one... */ 1254 if( NULL != q->curr ) { 1255 saa7146_buffer_finish(dev,q,VIDEOBUF_DONE); 1256 } 1257 saa7146_buffer_next(dev,q,0); 1258 1259 spin_unlock(&dev->slock); 1260} 1261 1262static ssize_t video_read(struct file *file, char __user *data, size_t count, loff_t *ppos) 1263{ 1264 struct saa7146_fh *fh = file->private_data; 1265 struct saa7146_dev *dev = fh->dev; 1266 struct saa7146_vv *vv = dev->vv_data; 1267 ssize_t ret = 0; 1268 1269 DEB_EE("called\n"); 1270 1271 if ((vv->video_status & STATUS_CAPTURE) != 0) { 1272 /* fixme: should we allow read() captures while streaming capture? */ 1273 if (vv->video_fh == fh) { 1274 DEB_S("already capturing\n"); 1275 return -EBUSY; 1276 } 1277 DEB_S("already capturing in another open\n"); 1278 return -EBUSY; 1279 } 1280 1281 ret = video_begin(fh); 1282 if( 0 != ret) { 1283 goto out; 1284 } 1285 1286 ret = videobuf_read_one(&fh->video_q , data, count, ppos, 1287 file->f_flags & O_NONBLOCK); 1288 if (ret != 0) { 1289 video_end(fh, file); 1290 } else { 1291 ret = video_end(fh, file); 1292 } 1293out: 1294 /* restart overlay if it was active before */ 1295 if (vv->ov_suspend != NULL) { 1296 saa7146_start_preview(vv->ov_suspend); 1297 vv->ov_suspend = NULL; 1298 } 1299 1300 return ret; 1301} 1302 1303struct saa7146_use_ops saa7146_video_uops = { 1304 .init = video_init, 1305 .open = video_open, 1306 .release = video_close, 1307 .irq_done = video_irq_done, 1308 .read = video_read, 1309}; 1310