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1287 lines
33 KiB
1287 lines
33 KiB
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
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#include <media/drv-intf/saa7146_vv.h> |
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#include <media/v4l2-event.h> |
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#include <media/v4l2-ctrls.h> |
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#include <linux/module.h> |
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#include <linux/kernel.h> |
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static int max_memory = 32; |
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module_param(max_memory, int, 0644); |
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MODULE_PARM_DESC(max_memory, "maximum memory usage for capture buffers (default: 32Mb)"); |
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#define IS_CAPTURE_ACTIVE(fh) \ |
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(((vv->video_status & STATUS_CAPTURE) != 0) && (vv->video_fh == fh)) |
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#define IS_OVERLAY_ACTIVE(fh) \ |
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(((vv->video_status & STATUS_OVERLAY) != 0) && (vv->video_fh == fh)) |
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/* format descriptions for capture and preview */ |
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static struct saa7146_format formats[] = { |
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{ |
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.pixelformat = V4L2_PIX_FMT_RGB332, |
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.trans = RGB08_COMPOSED, |
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.depth = 8, |
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.flags = 0, |
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}, { |
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.pixelformat = V4L2_PIX_FMT_RGB565, |
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.trans = RGB16_COMPOSED, |
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.depth = 16, |
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.flags = 0, |
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}, { |
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.pixelformat = V4L2_PIX_FMT_BGR24, |
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.trans = RGB24_COMPOSED, |
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.depth = 24, |
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.flags = 0, |
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}, { |
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.pixelformat = V4L2_PIX_FMT_BGR32, |
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.trans = RGB32_COMPOSED, |
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.depth = 32, |
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.flags = 0, |
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}, { |
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.pixelformat = V4L2_PIX_FMT_RGB32, |
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.trans = RGB32_COMPOSED, |
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.depth = 32, |
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.flags = 0, |
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.swap = 0x2, |
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}, { |
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.pixelformat = V4L2_PIX_FMT_GREY, |
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.trans = Y8, |
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.depth = 8, |
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.flags = 0, |
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}, { |
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.pixelformat = V4L2_PIX_FMT_YUV422P, |
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.trans = YUV422_DECOMPOSED, |
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.depth = 16, |
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.flags = FORMAT_BYTE_SWAP|FORMAT_IS_PLANAR, |
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}, { |
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.pixelformat = V4L2_PIX_FMT_YVU420, |
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.trans = YUV420_DECOMPOSED, |
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.depth = 12, |
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.flags = FORMAT_BYTE_SWAP|FORMAT_IS_PLANAR, |
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}, { |
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.pixelformat = V4L2_PIX_FMT_YUV420, |
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.trans = YUV420_DECOMPOSED, |
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.depth = 12, |
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.flags = FORMAT_IS_PLANAR, |
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}, { |
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.pixelformat = V4L2_PIX_FMT_UYVY, |
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.trans = YUV422_COMPOSED, |
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.depth = 16, |
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.flags = 0, |
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} |
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}; |
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/* unfortunately, the saa7146 contains a bug which prevents it from doing on-the-fly byte swaps. |
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due to this, it's impossible to provide additional *packed* formats, which are simply byte swapped |
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(like V4L2_PIX_FMT_YUYV) ... 8-( */ |
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struct saa7146_format* saa7146_format_by_fourcc(struct saa7146_dev *dev, int fourcc) |
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{ |
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int i; |
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for (i = 0; i < ARRAY_SIZE(formats); i++) { |
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if (formats[i].pixelformat == fourcc) { |
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return formats+i; |
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} |
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} |
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DEB_D("unknown pixelformat:'%4.4s'\n", (char *)&fourcc); |
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return NULL; |
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} |
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static int vidioc_try_fmt_vid_overlay(struct file *file, void *fh, struct v4l2_format *f); |
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int saa7146_start_preview(struct saa7146_fh *fh) |
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{ |
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struct saa7146_dev *dev = fh->dev; |
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struct saa7146_vv *vv = dev->vv_data; |
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struct v4l2_format fmt; |
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int ret = 0, err = 0; |
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DEB_EE("dev:%p, fh:%p\n", dev, fh); |
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/* check if we have overlay information */ |
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if (vv->ov.fh == NULL) { |
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DEB_D("no overlay data available. try S_FMT first.\n"); |
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return -EAGAIN; |
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} |
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/* check if streaming capture is running */ |
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if (IS_CAPTURE_ACTIVE(fh) != 0) { |
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DEB_D("streaming capture is active\n"); |
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return -EBUSY; |
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} |
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/* check if overlay is running */ |
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if (IS_OVERLAY_ACTIVE(fh) != 0) { |
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if (vv->video_fh == fh) { |
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DEB_D("overlay is already active\n"); |
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return 0; |
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} |
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DEB_D("overlay is already active in another open\n"); |
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return -EBUSY; |
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} |
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if (0 == saa7146_res_get(fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP)) { |
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DEB_D("cannot get necessary overlay resources\n"); |
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return -EBUSY; |
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} |
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fmt.fmt.win = vv->ov.win; |
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err = vidioc_try_fmt_vid_overlay(NULL, fh, &fmt); |
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if (0 != err) { |
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saa7146_res_free(vv->video_fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP); |
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return -EBUSY; |
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} |
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vv->ov.win = fmt.fmt.win; |
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DEB_D("%dx%d+%d+%d 0x%08x field=%s\n", |
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vv->ov.win.w.width, vv->ov.win.w.height, |
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vv->ov.win.w.left, vv->ov.win.w.top, |
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vv->ov_fmt->pixelformat, v4l2_field_names[vv->ov.win.field]); |
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if (0 != (ret = saa7146_enable_overlay(fh))) { |
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DEB_D("enabling overlay failed: %d\n", ret); |
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saa7146_res_free(vv->video_fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP); |
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return ret; |
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} |
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vv->video_status = STATUS_OVERLAY; |
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vv->video_fh = fh; |
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return 0; |
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} |
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EXPORT_SYMBOL_GPL(saa7146_start_preview); |
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int saa7146_stop_preview(struct saa7146_fh *fh) |
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{ |
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struct saa7146_dev *dev = fh->dev; |
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struct saa7146_vv *vv = dev->vv_data; |
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DEB_EE("dev:%p, fh:%p\n", dev, fh); |
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/* check if streaming capture is running */ |
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if (IS_CAPTURE_ACTIVE(fh) != 0) { |
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DEB_D("streaming capture is active\n"); |
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return -EBUSY; |
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} |
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/* check if overlay is running at all */ |
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if ((vv->video_status & STATUS_OVERLAY) == 0) { |
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DEB_D("no active overlay\n"); |
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return 0; |
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} |
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if (vv->video_fh != fh) { |
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DEB_D("overlay is active, but in another open\n"); |
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return -EBUSY; |
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} |
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vv->video_status = 0; |
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vv->video_fh = NULL; |
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saa7146_disable_overlay(fh); |
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saa7146_res_free(fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP); |
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return 0; |
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} |
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EXPORT_SYMBOL_GPL(saa7146_stop_preview); |
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/********************************************************************************/ |
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/* common pagetable functions */ |
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static int saa7146_pgtable_build(struct saa7146_dev *dev, struct saa7146_buf *buf) |
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{ |
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struct pci_dev *pci = dev->pci; |
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struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb); |
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struct scatterlist *list = dma->sglist; |
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int length = dma->sglen; |
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struct saa7146_format *sfmt = saa7146_format_by_fourcc(dev,buf->fmt->pixelformat); |
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DEB_EE("dev:%p, buf:%p, sg_len:%d\n", dev, buf, length); |
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if( 0 != IS_PLANAR(sfmt->trans)) { |
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struct saa7146_pgtable *pt1 = &buf->pt[0]; |
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struct saa7146_pgtable *pt2 = &buf->pt[1]; |
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struct saa7146_pgtable *pt3 = &buf->pt[2]; |
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__le32 *ptr1, *ptr2, *ptr3; |
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__le32 fill; |
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int size = buf->fmt->width*buf->fmt->height; |
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int i,p,m1,m2,m3,o1,o2; |
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switch( sfmt->depth ) { |
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case 12: { |
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/* create some offsets inside the page table */ |
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m1 = ((size+PAGE_SIZE)/PAGE_SIZE)-1; |
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m2 = ((size+(size/4)+PAGE_SIZE)/PAGE_SIZE)-1; |
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m3 = ((size+(size/2)+PAGE_SIZE)/PAGE_SIZE)-1; |
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o1 = size%PAGE_SIZE; |
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o2 = (size+(size/4))%PAGE_SIZE; |
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DEB_CAP("size:%d, m1:%d, m2:%d, m3:%d, o1:%d, o2:%d\n", |
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size, m1, m2, m3, o1, o2); |
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break; |
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} |
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case 16: { |
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/* create some offsets inside the page table */ |
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m1 = ((size+PAGE_SIZE)/PAGE_SIZE)-1; |
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m2 = ((size+(size/2)+PAGE_SIZE)/PAGE_SIZE)-1; |
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m3 = ((2*size+PAGE_SIZE)/PAGE_SIZE)-1; |
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o1 = size%PAGE_SIZE; |
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o2 = (size+(size/2))%PAGE_SIZE; |
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DEB_CAP("size:%d, m1:%d, m2:%d, m3:%d, o1:%d, o2:%d\n", |
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size, m1, m2, m3, o1, o2); |
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break; |
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} |
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default: { |
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return -1; |
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} |
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} |
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ptr1 = pt1->cpu; |
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ptr2 = pt2->cpu; |
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ptr3 = pt3->cpu; |
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/* walk all pages, copy all page addresses to ptr1 */ |
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for (i = 0; i < length; i++, list++) { |
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for (p = 0; p * 4096 < sg_dma_len(list); p++, ptr1++) |
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*ptr1 = cpu_to_le32(sg_dma_address(list) - list->offset); |
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} |
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/* |
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ptr1 = pt1->cpu; |
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for(j=0;j<40;j++) { |
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printk("ptr1 %d: 0x%08x\n",j,ptr1[j]); |
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} |
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*/ |
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/* if we have a user buffer, the first page may not be |
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aligned to a page boundary. */ |
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pt1->offset = dma->sglist->offset; |
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pt2->offset = pt1->offset+o1; |
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pt3->offset = pt1->offset+o2; |
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/* create video-dma2 page table */ |
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ptr1 = pt1->cpu; |
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for(i = m1; i <= m2 ; i++, ptr2++) { |
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*ptr2 = ptr1[i]; |
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} |
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fill = *(ptr2-1); |
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for(;i<1024;i++,ptr2++) { |
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*ptr2 = fill; |
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} |
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/* create video-dma3 page table */ |
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ptr1 = pt1->cpu; |
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for(i = m2; i <= m3; i++,ptr3++) { |
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*ptr3 = ptr1[i]; |
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} |
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fill = *(ptr3-1); |
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for(;i<1024;i++,ptr3++) { |
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*ptr3 = fill; |
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} |
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/* finally: finish up video-dma1 page table */ |
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ptr1 = pt1->cpu+m1; |
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fill = pt1->cpu[m1]; |
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for(i=m1;i<1024;i++,ptr1++) { |
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*ptr1 = fill; |
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} |
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/* |
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ptr1 = pt1->cpu; |
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ptr2 = pt2->cpu; |
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ptr3 = pt3->cpu; |
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for(j=0;j<40;j++) { |
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printk("ptr1 %d: 0x%08x\n",j,ptr1[j]); |
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} |
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for(j=0;j<40;j++) { |
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printk("ptr2 %d: 0x%08x\n",j,ptr2[j]); |
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} |
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for(j=0;j<40;j++) { |
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printk("ptr3 %d: 0x%08x\n",j,ptr3[j]); |
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} |
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*/ |
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} else { |
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struct saa7146_pgtable *pt = &buf->pt[0]; |
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return saa7146_pgtable_build_single(pci, pt, list, length); |
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} |
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return 0; |
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} |
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/********************************************************************************/ |
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/* file operations */ |
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static int video_begin(struct saa7146_fh *fh) |
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{ |
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struct saa7146_dev *dev = fh->dev; |
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struct saa7146_vv *vv = dev->vv_data; |
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struct saa7146_format *fmt = NULL; |
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unsigned int resource; |
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int ret = 0, err = 0; |
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DEB_EE("dev:%p, fh:%p\n", dev, fh); |
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if ((vv->video_status & STATUS_CAPTURE) != 0) { |
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if (vv->video_fh == fh) { |
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DEB_S("already capturing\n"); |
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return 0; |
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} |
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DEB_S("already capturing in another open\n"); |
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return -EBUSY; |
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} |
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if ((vv->video_status & STATUS_OVERLAY) != 0) { |
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DEB_S("warning: suspending overlay video for streaming capture\n"); |
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vv->ov_suspend = vv->video_fh; |
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err = saa7146_stop_preview(vv->video_fh); /* side effect: video_status is now 0, video_fh is NULL */ |
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if (0 != err) { |
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DEB_D("suspending video failed. aborting\n"); |
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return err; |
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} |
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} |
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fmt = saa7146_format_by_fourcc(dev, vv->video_fmt.pixelformat); |
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/* we need to have a valid format set here */ |
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if (!fmt) |
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return -EINVAL; |
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if (0 != (fmt->flags & FORMAT_IS_PLANAR)) { |
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resource = RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP|RESOURCE_DMA3_BRS; |
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} else { |
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resource = RESOURCE_DMA1_HPS; |
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} |
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ret = saa7146_res_get(fh, resource); |
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if (0 == ret) { |
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DEB_S("cannot get capture resource %d\n", resource); |
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if (vv->ov_suspend != NULL) { |
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saa7146_start_preview(vv->ov_suspend); |
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vv->ov_suspend = NULL; |
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} |
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return -EBUSY; |
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} |
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/* clear out beginning of streaming bit (rps register 0)*/ |
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saa7146_write(dev, MC2, MASK_27 ); |
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/* enable rps0 irqs */ |
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SAA7146_IER_ENABLE(dev, MASK_27); |
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vv->video_fh = fh; |
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vv->video_status = STATUS_CAPTURE; |
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return 0; |
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} |
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static int video_end(struct saa7146_fh *fh, struct file *file) |
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{ |
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struct saa7146_dev *dev = fh->dev; |
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struct saa7146_vv *vv = dev->vv_data; |
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struct saa7146_dmaqueue *q = &vv->video_dmaq; |
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struct saa7146_format *fmt = NULL; |
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unsigned long flags; |
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unsigned int resource; |
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u32 dmas = 0; |
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DEB_EE("dev:%p, fh:%p\n", dev, fh); |
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if ((vv->video_status & STATUS_CAPTURE) != STATUS_CAPTURE) { |
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DEB_S("not capturing\n"); |
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return 0; |
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} |
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if (vv->video_fh != fh) { |
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DEB_S("capturing, but in another open\n"); |
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return -EBUSY; |
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} |
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fmt = saa7146_format_by_fourcc(dev, vv->video_fmt.pixelformat); |
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/* we need to have a valid format set here */ |
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if (!fmt) |
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return -EINVAL; |
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if (0 != (fmt->flags & FORMAT_IS_PLANAR)) { |
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resource = RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP|RESOURCE_DMA3_BRS; |
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dmas = MASK_22 | MASK_21 | MASK_20; |
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} else { |
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resource = RESOURCE_DMA1_HPS; |
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dmas = MASK_22; |
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} |
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spin_lock_irqsave(&dev->slock,flags); |
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/* disable rps0 */ |
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saa7146_write(dev, MC1, MASK_28); |
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/* disable rps0 irqs */ |
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SAA7146_IER_DISABLE(dev, MASK_27); |
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/* shut down all used video dma transfers */ |
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saa7146_write(dev, MC1, dmas); |
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if (q->curr) |
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saa7146_buffer_finish(dev, q, VIDEOBUF_DONE); |
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spin_unlock_irqrestore(&dev->slock, flags); |
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vv->video_fh = NULL; |
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vv->video_status = 0; |
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saa7146_res_free(fh, resource); |
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if (vv->ov_suspend != NULL) { |
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saa7146_start_preview(vv->ov_suspend); |
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vv->ov_suspend = NULL; |
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} |
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return 0; |
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} |
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static int vidioc_querycap(struct file *file, void *fh, struct v4l2_capability *cap) |
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{ |
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struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev; |
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strscpy((char *)cap->driver, "saa7146 v4l2", sizeof(cap->driver)); |
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strscpy((char *)cap->card, dev->ext->name, sizeof(cap->card)); |
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sprintf((char *)cap->bus_info, "PCI:%s", pci_name(dev->pci)); |
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cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OVERLAY | |
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V4L2_CAP_READWRITE | V4L2_CAP_STREAMING | |
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V4L2_CAP_DEVICE_CAPS; |
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cap->capabilities |= dev->ext_vv_data->capabilities; |
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return 0; |
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} |
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static int vidioc_g_fbuf(struct file *file, void *fh, struct v4l2_framebuffer *fb) |
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{ |
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struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev; |
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struct saa7146_vv *vv = dev->vv_data; |
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|
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*fb = vv->ov_fb; |
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fb->capability = V4L2_FBUF_CAP_LIST_CLIPPING; |
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fb->flags = V4L2_FBUF_FLAG_PRIMARY; |
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return 0; |
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} |
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static int vidioc_s_fbuf(struct file *file, void *fh, const struct v4l2_framebuffer *fb) |
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{ |
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struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev; |
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struct saa7146_vv *vv = dev->vv_data; |
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struct saa7146_format *fmt; |
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DEB_EE("VIDIOC_S_FBUF\n"); |
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|
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if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO)) |
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return -EPERM; |
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|
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/* check args */ |
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fmt = saa7146_format_by_fourcc(dev, fb->fmt.pixelformat); |
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if (NULL == fmt) |
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return -EINVAL; |
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|
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/* planar formats are not allowed for overlay video, clipping and video dma would clash */ |
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if (fmt->flags & FORMAT_IS_PLANAR) |
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DEB_S("planar pixelformat '%4.4s' not allowed for overlay\n", |
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(char *)&fmt->pixelformat); |
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|
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/* check if overlay is running */ |
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if (IS_OVERLAY_ACTIVE(fh) != 0) { |
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if (vv->video_fh != fh) { |
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DEB_D("refusing to change framebuffer information while overlay is active in another open\n"); |
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return -EBUSY; |
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} |
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} |
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|
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/* ok, accept it */ |
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vv->ov_fb = *fb; |
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vv->ov_fmt = fmt; |
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|
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if (vv->ov_fb.fmt.bytesperline < vv->ov_fb.fmt.width) { |
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vv->ov_fb.fmt.bytesperline = vv->ov_fb.fmt.width * fmt->depth / 8; |
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DEB_D("setting bytesperline to %d\n", vv->ov_fb.fmt.bytesperline); |
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} |
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return 0; |
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} |
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|
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static int vidioc_enum_fmt_vid_cap(struct file *file, void *fh, struct v4l2_fmtdesc *f) |
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{ |
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if (f->index >= ARRAY_SIZE(formats)) |
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return -EINVAL; |
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f->pixelformat = formats[f->index].pixelformat; |
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return 0; |
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} |
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|
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int saa7146_s_ctrl(struct v4l2_ctrl *ctrl) |
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{ |
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struct saa7146_dev *dev = container_of(ctrl->handler, |
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struct saa7146_dev, ctrl_handler); |
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struct saa7146_vv *vv = dev->vv_data; |
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u32 val; |
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|
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switch (ctrl->id) { |
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case V4L2_CID_BRIGHTNESS: |
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val = saa7146_read(dev, BCS_CTRL); |
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val &= 0x00ffffff; |
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val |= (ctrl->val << 24); |
|
saa7146_write(dev, BCS_CTRL, val); |
|
saa7146_write(dev, MC2, MASK_22 | MASK_06); |
|
break; |
|
|
|
case V4L2_CID_CONTRAST: |
|
val = saa7146_read(dev, BCS_CTRL); |
|
val &= 0xff00ffff; |
|
val |= (ctrl->val << 16); |
|
saa7146_write(dev, BCS_CTRL, val); |
|
saa7146_write(dev, MC2, MASK_22 | MASK_06); |
|
break; |
|
|
|
case V4L2_CID_SATURATION: |
|
val = saa7146_read(dev, BCS_CTRL); |
|
val &= 0xffffff00; |
|
val |= (ctrl->val << 0); |
|
saa7146_write(dev, BCS_CTRL, val); |
|
saa7146_write(dev, MC2, MASK_22 | MASK_06); |
|
break; |
|
|
|
case V4L2_CID_HFLIP: |
|
/* fixme: we can support changing VFLIP and HFLIP here... */ |
|
if ((vv->video_status & STATUS_CAPTURE)) |
|
return -EBUSY; |
|
vv->hflip = ctrl->val; |
|
break; |
|
|
|
case V4L2_CID_VFLIP: |
|
if ((vv->video_status & STATUS_CAPTURE)) |
|
return -EBUSY; |
|
vv->vflip = ctrl->val; |
|
break; |
|
|
|
default: |
|
return -EINVAL; |
|
} |
|
|
|
if ((vv->video_status & STATUS_OVERLAY) != 0) { /* CHECK: && (vv->video_fh == fh)) */ |
|
struct saa7146_fh *fh = vv->video_fh; |
|
|
|
saa7146_stop_preview(fh); |
|
saa7146_start_preview(fh); |
|
} |
|
return 0; |
|
} |
|
|
|
static int vidioc_g_parm(struct file *file, void *fh, |
|
struct v4l2_streamparm *parm) |
|
{ |
|
struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev; |
|
struct saa7146_vv *vv = dev->vv_data; |
|
|
|
if (parm->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
|
return -EINVAL; |
|
parm->parm.capture.readbuffers = 1; |
|
v4l2_video_std_frame_period(vv->standard->id, |
|
&parm->parm.capture.timeperframe); |
|
return 0; |
|
} |
|
|
|
static int vidioc_g_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *f) |
|
{ |
|
struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev; |
|
struct saa7146_vv *vv = dev->vv_data; |
|
|
|
f->fmt.pix = vv->video_fmt; |
|
return 0; |
|
} |
|
|
|
static int vidioc_g_fmt_vid_overlay(struct file *file, void *fh, struct v4l2_format *f) |
|
{ |
|
struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev; |
|
struct saa7146_vv *vv = dev->vv_data; |
|
|
|
f->fmt.win = vv->ov.win; |
|
return 0; |
|
} |
|
|
|
static int vidioc_g_fmt_vbi_cap(struct file *file, void *fh, struct v4l2_format *f) |
|
{ |
|
struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev; |
|
struct saa7146_vv *vv = dev->vv_data; |
|
|
|
f->fmt.vbi = vv->vbi_fmt; |
|
return 0; |
|
} |
|
|
|
static int vidioc_try_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *f) |
|
{ |
|
struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev; |
|
struct saa7146_vv *vv = dev->vv_data; |
|
struct saa7146_format *fmt; |
|
enum v4l2_field field; |
|
int maxw, maxh; |
|
int calc_bpl; |
|
|
|
DEB_EE("V4L2_BUF_TYPE_VIDEO_CAPTURE: dev:%p, fh:%p\n", dev, fh); |
|
|
|
fmt = saa7146_format_by_fourcc(dev, f->fmt.pix.pixelformat); |
|
if (NULL == fmt) |
|
return -EINVAL; |
|
|
|
field = f->fmt.pix.field; |
|
maxw = vv->standard->h_max_out; |
|
maxh = vv->standard->v_max_out; |
|
|
|
if (V4L2_FIELD_ANY == field) { |
|
field = (f->fmt.pix.height > maxh / 2) |
|
? V4L2_FIELD_INTERLACED |
|
: V4L2_FIELD_BOTTOM; |
|
} |
|
switch (field) { |
|
case V4L2_FIELD_ALTERNATE: |
|
vv->last_field = V4L2_FIELD_TOP; |
|
maxh = maxh / 2; |
|
break; |
|
case V4L2_FIELD_TOP: |
|
case V4L2_FIELD_BOTTOM: |
|
vv->last_field = V4L2_FIELD_INTERLACED; |
|
maxh = maxh / 2; |
|
break; |
|
case V4L2_FIELD_INTERLACED: |
|
vv->last_field = V4L2_FIELD_INTERLACED; |
|
break; |
|
default: |
|
DEB_D("no known field mode '%d'\n", field); |
|
return -EINVAL; |
|
} |
|
|
|
f->fmt.pix.field = field; |
|
f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M; |
|
if (f->fmt.pix.width > maxw) |
|
f->fmt.pix.width = maxw; |
|
if (f->fmt.pix.height > maxh) |
|
f->fmt.pix.height = maxh; |
|
|
|
calc_bpl = (f->fmt.pix.width * fmt->depth) / 8; |
|
|
|
if (f->fmt.pix.bytesperline < calc_bpl) |
|
f->fmt.pix.bytesperline = calc_bpl; |
|
|
|
if (f->fmt.pix.bytesperline > (2 * PAGE_SIZE * fmt->depth) / 8) /* arbitrary constraint */ |
|
f->fmt.pix.bytesperline = calc_bpl; |
|
|
|
f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * f->fmt.pix.height; |
|
DEB_D("w:%d, h:%d, bytesperline:%d, sizeimage:%d\n", |
|
f->fmt.pix.width, f->fmt.pix.height, |
|
f->fmt.pix.bytesperline, f->fmt.pix.sizeimage); |
|
|
|
return 0; |
|
} |
|
|
|
|
|
static int vidioc_try_fmt_vid_overlay(struct file *file, void *fh, struct v4l2_format *f) |
|
{ |
|
struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev; |
|
struct saa7146_vv *vv = dev->vv_data; |
|
struct v4l2_window *win = &f->fmt.win; |
|
enum v4l2_field field; |
|
int maxw, maxh; |
|
|
|
DEB_EE("dev:%p\n", dev); |
|
|
|
if (NULL == vv->ov_fb.base) { |
|
DEB_D("no fb base set\n"); |
|
return -EINVAL; |
|
} |
|
if (NULL == vv->ov_fmt) { |
|
DEB_D("no fb fmt set\n"); |
|
return -EINVAL; |
|
} |
|
if (win->w.width < 48 || win->w.height < 32) { |
|
DEB_D("min width/height. (%d,%d)\n", |
|
win->w.width, win->w.height); |
|
return -EINVAL; |
|
} |
|
if (win->clipcount > 16) { |
|
DEB_D("clipcount too big\n"); |
|
return -EINVAL; |
|
} |
|
|
|
field = win->field; |
|
maxw = vv->standard->h_max_out; |
|
maxh = vv->standard->v_max_out; |
|
|
|
if (V4L2_FIELD_ANY == field) { |
|
field = (win->w.height > maxh / 2) |
|
? V4L2_FIELD_INTERLACED |
|
: V4L2_FIELD_TOP; |
|
} |
|
switch (field) { |
|
case V4L2_FIELD_TOP: |
|
case V4L2_FIELD_BOTTOM: |
|
case V4L2_FIELD_ALTERNATE: |
|
maxh = maxh / 2; |
|
break; |
|
case V4L2_FIELD_INTERLACED: |
|
break; |
|
default: |
|
DEB_D("no known field mode '%d'\n", field); |
|
return -EINVAL; |
|
} |
|
|
|
win->field = field; |
|
if (win->w.width > maxw) |
|
win->w.width = maxw; |
|
if (win->w.height > maxh) |
|
win->w.height = maxh; |
|
|
|
return 0; |
|
} |
|
|
|
static int vidioc_s_fmt_vid_cap(struct file *file, void *__fh, struct v4l2_format *f) |
|
{ |
|
struct saa7146_fh *fh = __fh; |
|
struct saa7146_dev *dev = fh->dev; |
|
struct saa7146_vv *vv = dev->vv_data; |
|
int err; |
|
|
|
DEB_EE("V4L2_BUF_TYPE_VIDEO_CAPTURE: dev:%p, fh:%p\n", dev, fh); |
|
if (IS_CAPTURE_ACTIVE(fh) != 0) { |
|
DEB_EE("streaming capture is active\n"); |
|
return -EBUSY; |
|
} |
|
err = vidioc_try_fmt_vid_cap(file, fh, f); |
|
if (0 != err) |
|
return err; |
|
vv->video_fmt = f->fmt.pix; |
|
DEB_EE("set to pixelformat '%4.4s'\n", |
|
(char *)&vv->video_fmt.pixelformat); |
|
return 0; |
|
} |
|
|
|
static int vidioc_s_fmt_vid_overlay(struct file *file, void *__fh, struct v4l2_format *f) |
|
{ |
|
struct saa7146_fh *fh = __fh; |
|
struct saa7146_dev *dev = fh->dev; |
|
struct saa7146_vv *vv = dev->vv_data; |
|
int err; |
|
|
|
DEB_EE("V4L2_BUF_TYPE_VIDEO_OVERLAY: dev:%p, fh:%p\n", dev, fh); |
|
err = vidioc_try_fmt_vid_overlay(file, fh, f); |
|
if (0 != err) |
|
return err; |
|
vv->ov.win = f->fmt.win; |
|
vv->ov.nclips = f->fmt.win.clipcount; |
|
if (vv->ov.nclips > 16) |
|
vv->ov.nclips = 16; |
|
memcpy(vv->ov.clips, f->fmt.win.clips, |
|
sizeof(struct v4l2_clip) * vv->ov.nclips); |
|
|
|
/* vv->ov.fh is used to indicate that we have valid overlay information, too */ |
|
vv->ov.fh = fh; |
|
|
|
/* check if our current overlay is active */ |
|
if (IS_OVERLAY_ACTIVE(fh) != 0) { |
|
saa7146_stop_preview(fh); |
|
saa7146_start_preview(fh); |
|
} |
|
return 0; |
|
} |
|
|
|
static int vidioc_g_std(struct file *file, void *fh, v4l2_std_id *norm) |
|
{ |
|
struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev; |
|
struct saa7146_vv *vv = dev->vv_data; |
|
|
|
*norm = vv->standard->id; |
|
return 0; |
|
} |
|
|
|
/* the saa7146 supfhrts (used in conjunction with the saa7111a for example) |
|
PAL / NTSC / SECAM. if your hardware does not (or does more) |
|
-- override this function in your extension */ |
|
/* |
|
case VIDIOC_ENUMSTD: |
|
{ |
|
struct v4l2_standard *e = arg; |
|
if (e->index < 0 ) |
|
return -EINVAL; |
|
if( e->index < dev->ext_vv_data->num_stds ) { |
|
DEB_EE("VIDIOC_ENUMSTD: index:%d\n", e->index); |
|
v4l2_video_std_construct(e, dev->ext_vv_data->stds[e->index].id, dev->ext_vv_data->stds[e->index].name); |
|
return 0; |
|
} |
|
return -EINVAL; |
|
} |
|
*/ |
|
|
|
static int vidioc_s_std(struct file *file, void *fh, v4l2_std_id id) |
|
{ |
|
struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev; |
|
struct saa7146_vv *vv = dev->vv_data; |
|
int found = 0; |
|
int err, i; |
|
|
|
DEB_EE("VIDIOC_S_STD\n"); |
|
|
|
if ((vv->video_status & STATUS_CAPTURE) == STATUS_CAPTURE) { |
|
DEB_D("cannot change video standard while streaming capture is active\n"); |
|
return -EBUSY; |
|
} |
|
|
|
if ((vv->video_status & STATUS_OVERLAY) != 0) { |
|
vv->ov_suspend = vv->video_fh; |
|
err = saa7146_stop_preview(vv->video_fh); /* side effect: video_status is now 0, video_fh is NULL */ |
|
if (0 != err) { |
|
DEB_D("suspending video failed. aborting\n"); |
|
return err; |
|
} |
|
} |
|
|
|
for (i = 0; i < dev->ext_vv_data->num_stds; i++) |
|
if (id & dev->ext_vv_data->stds[i].id) |
|
break; |
|
if (i != dev->ext_vv_data->num_stds) { |
|
vv->standard = &dev->ext_vv_data->stds[i]; |
|
if (NULL != dev->ext_vv_data->std_callback) |
|
dev->ext_vv_data->std_callback(dev, vv->standard); |
|
found = 1; |
|
} |
|
|
|
if (vv->ov_suspend != NULL) { |
|
saa7146_start_preview(vv->ov_suspend); |
|
vv->ov_suspend = NULL; |
|
} |
|
|
|
if (!found) { |
|
DEB_EE("VIDIOC_S_STD: standard not found\n"); |
|
return -EINVAL; |
|
} |
|
|
|
DEB_EE("VIDIOC_S_STD: set to standard to '%s'\n", vv->standard->name); |
|
return 0; |
|
} |
|
|
|
static int vidioc_overlay(struct file *file, void *fh, unsigned int on) |
|
{ |
|
int err; |
|
|
|
DEB_D("VIDIOC_OVERLAY on:%d\n", on); |
|
if (on) |
|
err = saa7146_start_preview(fh); |
|
else |
|
err = saa7146_stop_preview(fh); |
|
return err; |
|
} |
|
|
|
static int vidioc_reqbufs(struct file *file, void *__fh, struct v4l2_requestbuffers *b) |
|
{ |
|
struct saa7146_fh *fh = __fh; |
|
|
|
if (b->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) |
|
return videobuf_reqbufs(&fh->video_q, b); |
|
if (b->type == V4L2_BUF_TYPE_VBI_CAPTURE) |
|
return videobuf_reqbufs(&fh->vbi_q, b); |
|
return -EINVAL; |
|
} |
|
|
|
static int vidioc_querybuf(struct file *file, void *__fh, struct v4l2_buffer *buf) |
|
{ |
|
struct saa7146_fh *fh = __fh; |
|
|
|
if (buf->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) |
|
return videobuf_querybuf(&fh->video_q, buf); |
|
if (buf->type == V4L2_BUF_TYPE_VBI_CAPTURE) |
|
return videobuf_querybuf(&fh->vbi_q, buf); |
|
return -EINVAL; |
|
} |
|
|
|
static int vidioc_qbuf(struct file *file, void *__fh, struct v4l2_buffer *buf) |
|
{ |
|
struct saa7146_fh *fh = __fh; |
|
|
|
if (buf->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) |
|
return videobuf_qbuf(&fh->video_q, buf); |
|
if (buf->type == V4L2_BUF_TYPE_VBI_CAPTURE) |
|
return videobuf_qbuf(&fh->vbi_q, buf); |
|
return -EINVAL; |
|
} |
|
|
|
static int vidioc_dqbuf(struct file *file, void *__fh, struct v4l2_buffer *buf) |
|
{ |
|
struct saa7146_fh *fh = __fh; |
|
|
|
if (buf->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) |
|
return videobuf_dqbuf(&fh->video_q, buf, file->f_flags & O_NONBLOCK); |
|
if (buf->type == V4L2_BUF_TYPE_VBI_CAPTURE) |
|
return videobuf_dqbuf(&fh->vbi_q, buf, file->f_flags & O_NONBLOCK); |
|
return -EINVAL; |
|
} |
|
|
|
static int vidioc_streamon(struct file *file, void *__fh, enum v4l2_buf_type type) |
|
{ |
|
struct saa7146_fh *fh = __fh; |
|
int err; |
|
|
|
DEB_D("VIDIOC_STREAMON, type:%d\n", type); |
|
|
|
err = video_begin(fh); |
|
if (err) |
|
return err; |
|
if (type == V4L2_BUF_TYPE_VIDEO_CAPTURE) |
|
return videobuf_streamon(&fh->video_q); |
|
if (type == V4L2_BUF_TYPE_VBI_CAPTURE) |
|
return videobuf_streamon(&fh->vbi_q); |
|
return -EINVAL; |
|
} |
|
|
|
static int vidioc_streamoff(struct file *file, void *__fh, enum v4l2_buf_type type) |
|
{ |
|
struct saa7146_fh *fh = __fh; |
|
struct saa7146_dev *dev = fh->dev; |
|
struct saa7146_vv *vv = dev->vv_data; |
|
int err; |
|
|
|
DEB_D("VIDIOC_STREAMOFF, type:%d\n", type); |
|
|
|
/* ugly: we need to copy some checks from video_end(), |
|
because videobuf_streamoff() relies on the capture running. |
|
check and fix this */ |
|
if ((vv->video_status & STATUS_CAPTURE) != STATUS_CAPTURE) { |
|
DEB_S("not capturing\n"); |
|
return 0; |
|
} |
|
|
|
if (vv->video_fh != fh) { |
|
DEB_S("capturing, but in another open\n"); |
|
return -EBUSY; |
|
} |
|
|
|
err = -EINVAL; |
|
if (type == V4L2_BUF_TYPE_VIDEO_CAPTURE) |
|
err = videobuf_streamoff(&fh->video_q); |
|
else if (type == V4L2_BUF_TYPE_VBI_CAPTURE) |
|
err = videobuf_streamoff(&fh->vbi_q); |
|
if (0 != err) { |
|
DEB_D("warning: videobuf_streamoff() failed\n"); |
|
video_end(fh, file); |
|
} else { |
|
err = video_end(fh, file); |
|
} |
|
return err; |
|
} |
|
|
|
const struct v4l2_ioctl_ops saa7146_video_ioctl_ops = { |
|
.vidioc_querycap = vidioc_querycap, |
|
.vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, |
|
.vidioc_enum_fmt_vid_overlay = vidioc_enum_fmt_vid_cap, |
|
.vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap, |
|
.vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap, |
|
.vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, |
|
.vidioc_g_fmt_vid_overlay = vidioc_g_fmt_vid_overlay, |
|
.vidioc_try_fmt_vid_overlay = vidioc_try_fmt_vid_overlay, |
|
.vidioc_s_fmt_vid_overlay = vidioc_s_fmt_vid_overlay, |
|
|
|
.vidioc_overlay = vidioc_overlay, |
|
.vidioc_g_fbuf = vidioc_g_fbuf, |
|
.vidioc_s_fbuf = vidioc_s_fbuf, |
|
.vidioc_reqbufs = vidioc_reqbufs, |
|
.vidioc_querybuf = vidioc_querybuf, |
|
.vidioc_qbuf = vidioc_qbuf, |
|
.vidioc_dqbuf = vidioc_dqbuf, |
|
.vidioc_g_std = vidioc_g_std, |
|
.vidioc_s_std = vidioc_s_std, |
|
.vidioc_streamon = vidioc_streamon, |
|
.vidioc_streamoff = vidioc_streamoff, |
|
.vidioc_g_parm = vidioc_g_parm, |
|
.vidioc_subscribe_event = v4l2_ctrl_subscribe_event, |
|
.vidioc_unsubscribe_event = v4l2_event_unsubscribe, |
|
}; |
|
|
|
const struct v4l2_ioctl_ops saa7146_vbi_ioctl_ops = { |
|
.vidioc_querycap = vidioc_querycap, |
|
.vidioc_g_fmt_vbi_cap = vidioc_g_fmt_vbi_cap, |
|
|
|
.vidioc_reqbufs = vidioc_reqbufs, |
|
.vidioc_querybuf = vidioc_querybuf, |
|
.vidioc_qbuf = vidioc_qbuf, |
|
.vidioc_dqbuf = vidioc_dqbuf, |
|
.vidioc_g_std = vidioc_g_std, |
|
.vidioc_s_std = vidioc_s_std, |
|
.vidioc_streamon = vidioc_streamon, |
|
.vidioc_streamoff = vidioc_streamoff, |
|
.vidioc_g_parm = vidioc_g_parm, |
|
.vidioc_subscribe_event = v4l2_ctrl_subscribe_event, |
|
.vidioc_unsubscribe_event = v4l2_event_unsubscribe, |
|
}; |
|
|
|
/*********************************************************************************/ |
|
/* buffer handling functions */ |
|
|
|
static int buffer_activate (struct saa7146_dev *dev, |
|
struct saa7146_buf *buf, |
|
struct saa7146_buf *next) |
|
{ |
|
struct saa7146_vv *vv = dev->vv_data; |
|
|
|
buf->vb.state = VIDEOBUF_ACTIVE; |
|
saa7146_set_capture(dev,buf,next); |
|
|
|
mod_timer(&vv->video_dmaq.timeout, jiffies+BUFFER_TIMEOUT); |
|
return 0; |
|
} |
|
|
|
static void release_all_pagetables(struct saa7146_dev *dev, struct saa7146_buf *buf) |
|
{ |
|
saa7146_pgtable_free(dev->pci, &buf->pt[0]); |
|
saa7146_pgtable_free(dev->pci, &buf->pt[1]); |
|
saa7146_pgtable_free(dev->pci, &buf->pt[2]); |
|
} |
|
|
|
static int buffer_prepare(struct videobuf_queue *q, |
|
struct videobuf_buffer *vb, enum v4l2_field field) |
|
{ |
|
struct file *file = q->priv_data; |
|
struct saa7146_fh *fh = file->private_data; |
|
struct saa7146_dev *dev = fh->dev; |
|
struct saa7146_vv *vv = dev->vv_data; |
|
struct saa7146_buf *buf = (struct saa7146_buf *)vb; |
|
int size,err = 0; |
|
|
|
DEB_CAP("vbuf:%p\n", vb); |
|
|
|
/* sanity checks */ |
|
if (vv->video_fmt.width < 48 || |
|
vv->video_fmt.height < 32 || |
|
vv->video_fmt.width > vv->standard->h_max_out || |
|
vv->video_fmt.height > vv->standard->v_max_out) { |
|
DEB_D("w (%d) / h (%d) out of bounds\n", |
|
vv->video_fmt.width, vv->video_fmt.height); |
|
return -EINVAL; |
|
} |
|
|
|
size = vv->video_fmt.sizeimage; |
|
if (0 != buf->vb.baddr && buf->vb.bsize < size) { |
|
DEB_D("size mismatch\n"); |
|
return -EINVAL; |
|
} |
|
|
|
DEB_CAP("buffer_prepare [size=%dx%d,bytes=%d,fields=%s]\n", |
|
vv->video_fmt.width, vv->video_fmt.height, |
|
size, v4l2_field_names[vv->video_fmt.field]); |
|
if (buf->vb.width != vv->video_fmt.width || |
|
buf->vb.bytesperline != vv->video_fmt.bytesperline || |
|
buf->vb.height != vv->video_fmt.height || |
|
buf->vb.size != size || |
|
buf->vb.field != field || |
|
buf->vb.field != vv->video_fmt.field || |
|
buf->fmt != &vv->video_fmt) { |
|
saa7146_dma_free(dev,q,buf); |
|
} |
|
|
|
if (VIDEOBUF_NEEDS_INIT == buf->vb.state) { |
|
struct saa7146_format *sfmt; |
|
|
|
buf->vb.bytesperline = vv->video_fmt.bytesperline; |
|
buf->vb.width = vv->video_fmt.width; |
|
buf->vb.height = vv->video_fmt.height; |
|
buf->vb.size = size; |
|
buf->vb.field = field; |
|
buf->fmt = &vv->video_fmt; |
|
buf->vb.field = vv->video_fmt.field; |
|
|
|
sfmt = saa7146_format_by_fourcc(dev,buf->fmt->pixelformat); |
|
|
|
release_all_pagetables(dev, buf); |
|
if( 0 != IS_PLANAR(sfmt->trans)) { |
|
saa7146_pgtable_alloc(dev->pci, &buf->pt[0]); |
|
saa7146_pgtable_alloc(dev->pci, &buf->pt[1]); |
|
saa7146_pgtable_alloc(dev->pci, &buf->pt[2]); |
|
} else { |
|
saa7146_pgtable_alloc(dev->pci, &buf->pt[0]); |
|
} |
|
|
|
err = videobuf_iolock(q,&buf->vb, &vv->ov_fb); |
|
if (err) |
|
goto oops; |
|
err = saa7146_pgtable_build(dev,buf); |
|
if (err) |
|
goto oops; |
|
} |
|
buf->vb.state = VIDEOBUF_PREPARED; |
|
buf->activate = buffer_activate; |
|
|
|
return 0; |
|
|
|
oops: |
|
DEB_D("error out\n"); |
|
saa7146_dma_free(dev,q,buf); |
|
|
|
return err; |
|
} |
|
|
|
static int buffer_setup(struct videobuf_queue *q, unsigned int *count, unsigned int *size) |
|
{ |
|
struct file *file = q->priv_data; |
|
struct saa7146_fh *fh = file->private_data; |
|
struct saa7146_vv *vv = fh->dev->vv_data; |
|
|
|
if (0 == *count || *count > MAX_SAA7146_CAPTURE_BUFFERS) |
|
*count = MAX_SAA7146_CAPTURE_BUFFERS; |
|
|
|
*size = vv->video_fmt.sizeimage; |
|
|
|
/* check if we exceed the "max_memory" parameter */ |
|
if( (*count * *size) > (max_memory*1048576) ) { |
|
*count = (max_memory*1048576) / *size; |
|
} |
|
|
|
DEB_CAP("%d buffers, %d bytes each\n", *count, *size); |
|
|
|
return 0; |
|
} |
|
|
|
static void buffer_queue(struct videobuf_queue *q, struct videobuf_buffer *vb) |
|
{ |
|
struct file *file = q->priv_data; |
|
struct saa7146_fh *fh = file->private_data; |
|
struct saa7146_dev *dev = fh->dev; |
|
struct saa7146_vv *vv = dev->vv_data; |
|
struct saa7146_buf *buf = (struct saa7146_buf *)vb; |
|
|
|
DEB_CAP("vbuf:%p\n", vb); |
|
saa7146_buffer_queue(fh->dev, &vv->video_dmaq, buf); |
|
} |
|
|
|
static void buffer_release(struct videobuf_queue *q, struct videobuf_buffer *vb) |
|
{ |
|
struct file *file = q->priv_data; |
|
struct saa7146_fh *fh = file->private_data; |
|
struct saa7146_dev *dev = fh->dev; |
|
struct saa7146_buf *buf = (struct saa7146_buf *)vb; |
|
|
|
DEB_CAP("vbuf:%p\n", vb); |
|
|
|
saa7146_dma_free(dev,q,buf); |
|
|
|
release_all_pagetables(dev, buf); |
|
} |
|
|
|
static const struct videobuf_queue_ops video_qops = { |
|
.buf_setup = buffer_setup, |
|
.buf_prepare = buffer_prepare, |
|
.buf_queue = buffer_queue, |
|
.buf_release = buffer_release, |
|
}; |
|
|
|
/********************************************************************************/ |
|
/* file operations */ |
|
|
|
static void video_init(struct saa7146_dev *dev, struct saa7146_vv *vv) |
|
{ |
|
INIT_LIST_HEAD(&vv->video_dmaq.queue); |
|
|
|
timer_setup(&vv->video_dmaq.timeout, saa7146_buffer_timeout, 0); |
|
vv->video_dmaq.dev = dev; |
|
|
|
/* set some default values */ |
|
vv->standard = &dev->ext_vv_data->stds[0]; |
|
|
|
/* FIXME: what's this? */ |
|
vv->current_hps_source = SAA7146_HPS_SOURCE_PORT_A; |
|
vv->current_hps_sync = SAA7146_HPS_SYNC_PORT_A; |
|
} |
|
|
|
|
|
static int video_open(struct saa7146_dev *dev, struct file *file) |
|
{ |
|
struct saa7146_fh *fh = file->private_data; |
|
|
|
videobuf_queue_sg_init(&fh->video_q, &video_qops, |
|
&dev->pci->dev, &dev->slock, |
|
V4L2_BUF_TYPE_VIDEO_CAPTURE, |
|
V4L2_FIELD_INTERLACED, |
|
sizeof(struct saa7146_buf), |
|
file, &dev->v4l2_lock); |
|
|
|
return 0; |
|
} |
|
|
|
|
|
static void video_close(struct saa7146_dev *dev, struct file *file) |
|
{ |
|
struct saa7146_fh *fh = file->private_data; |
|
struct saa7146_vv *vv = dev->vv_data; |
|
struct videobuf_queue *q = &fh->video_q; |
|
|
|
if (IS_CAPTURE_ACTIVE(fh) != 0) |
|
video_end(fh, file); |
|
else if (IS_OVERLAY_ACTIVE(fh) != 0) |
|
saa7146_stop_preview(fh); |
|
|
|
videobuf_stop(q); |
|
/* hmm, why is this function declared void? */ |
|
} |
|
|
|
|
|
static void video_irq_done(struct saa7146_dev *dev, unsigned long st) |
|
{ |
|
struct saa7146_vv *vv = dev->vv_data; |
|
struct saa7146_dmaqueue *q = &vv->video_dmaq; |
|
|
|
spin_lock(&dev->slock); |
|
DEB_CAP("called\n"); |
|
|
|
/* only finish the buffer if we have one... */ |
|
if( NULL != q->curr ) { |
|
saa7146_buffer_finish(dev,q,VIDEOBUF_DONE); |
|
} |
|
saa7146_buffer_next(dev,q,0); |
|
|
|
spin_unlock(&dev->slock); |
|
} |
|
|
|
static ssize_t video_read(struct file *file, char __user *data, size_t count, loff_t *ppos) |
|
{ |
|
struct saa7146_fh *fh = file->private_data; |
|
struct saa7146_dev *dev = fh->dev; |
|
struct saa7146_vv *vv = dev->vv_data; |
|
ssize_t ret = 0; |
|
|
|
DEB_EE("called\n"); |
|
|
|
if ((vv->video_status & STATUS_CAPTURE) != 0) { |
|
/* fixme: should we allow read() captures while streaming capture? */ |
|
if (vv->video_fh == fh) { |
|
DEB_S("already capturing\n"); |
|
return -EBUSY; |
|
} |
|
DEB_S("already capturing in another open\n"); |
|
return -EBUSY; |
|
} |
|
|
|
ret = video_begin(fh); |
|
if( 0 != ret) { |
|
goto out; |
|
} |
|
|
|
ret = videobuf_read_one(&fh->video_q , data, count, ppos, |
|
file->f_flags & O_NONBLOCK); |
|
if (ret != 0) { |
|
video_end(fh, file); |
|
} else { |
|
ret = video_end(fh, file); |
|
} |
|
out: |
|
/* restart overlay if it was active before */ |
|
if (vv->ov_suspend != NULL) { |
|
saa7146_start_preview(vv->ov_suspend); |
|
vv->ov_suspend = NULL; |
|
} |
|
|
|
return ret; |
|
} |
|
|
|
const struct saa7146_use_ops saa7146_video_uops = { |
|
.init = video_init, |
|
.open = video_open, |
|
.release = video_close, |
|
.irq_done = video_irq_done, |
|
.read = video_read, |
|
};
|
|
|