diff options
Diffstat (limited to 'linux/drivers/media/video/saa7146/saa7146_video.c')
| -rw-r--r-- | linux/drivers/media/video/saa7146/saa7146_video.c | 1509 |
1 files changed, 0 insertions, 1509 deletions
diff --git a/linux/drivers/media/video/saa7146/saa7146_video.c b/linux/drivers/media/video/saa7146/saa7146_video.c deleted file mode 100644 index b68c6288b..000000000 --- a/linux/drivers/media/video/saa7146/saa7146_video.c +++ /dev/null @@ -1,1509 +0,0 @@ -#include <media/saa7146_vv.h> -#include "compat.h" - -static int max_memory = 32; - -module_param(max_memory, int, 0644); -MODULE_PARM_DESC(max_memory, "maximum memory usage for capture buffers (default: 32Mb)"); - -#define IS_CAPTURE_ACTIVE(fh) \ - (((vv->video_status & STATUS_CAPTURE) != 0) && (vv->video_fh == fh)) - -#define IS_OVERLAY_ACTIVE(fh) \ - (((vv->video_status & STATUS_OVERLAY) != 0) && (vv->video_fh == fh)) - -/* format descriptions for capture and preview */ -static struct saa7146_format formats[] = { - { - .name = "RGB-8 (3-3-2)", - .pixelformat = V4L2_PIX_FMT_RGB332, - .trans = RGB08_COMPOSED, - .depth = 8, - .flags = 0, - }, { - .name = "RGB-16 (5/B-6/G-5/R)", - .pixelformat = V4L2_PIX_FMT_RGB565, - .trans = RGB16_COMPOSED, - .depth = 16, - .flags = 0, - }, { - .name = "RGB-24 (B-G-R)", - .pixelformat = V4L2_PIX_FMT_BGR24, - .trans = RGB24_COMPOSED, - .depth = 24, - .flags = 0, - }, { - .name = "RGB-32 (B-G-R)", - .pixelformat = V4L2_PIX_FMT_BGR32, - .trans = RGB32_COMPOSED, - .depth = 32, - .flags = 0, - }, { - .name = "RGB-32 (R-G-B)", - .pixelformat = V4L2_PIX_FMT_RGB32, - .trans = RGB32_COMPOSED, - .depth = 32, - .flags = 0, - .swap = 0x2, - }, { - .name = "Greyscale-8", - .pixelformat = V4L2_PIX_FMT_GREY, - .trans = Y8, - .depth = 8, - .flags = 0, - }, { - .name = "YUV 4:2:2 planar (Y-Cb-Cr)", - .pixelformat = V4L2_PIX_FMT_YUV422P, - .trans = YUV422_DECOMPOSED, - .depth = 16, - .flags = FORMAT_BYTE_SWAP|FORMAT_IS_PLANAR, - }, { - .name = "YVU 4:2:0 planar (Y-Cb-Cr)", - .pixelformat = V4L2_PIX_FMT_YVU420, - .trans = YUV420_DECOMPOSED, - .depth = 12, - .flags = FORMAT_BYTE_SWAP|FORMAT_IS_PLANAR, - }, { - .name = "YUV 4:2:0 planar (Y-Cb-Cr)", - .pixelformat = V4L2_PIX_FMT_YUV420, - .trans = YUV420_DECOMPOSED, - .depth = 12, - .flags = FORMAT_IS_PLANAR, - }, { - .name = "YUV 4:2:2 (U-Y-V-Y)", - .pixelformat = V4L2_PIX_FMT_UYVY, - .trans = YUV422_COMPOSED, - .depth = 16, - .flags = 0, - } -}; - -/* unfortunately, the saa7146 contains a bug which prevents it from doing on-the-fly byte swaps. - due to this, it's impossible to provide additional *packed* formats, which are simply byte swapped - (like V4L2_PIX_FMT_YUYV) ... 8-( */ - -static int NUM_FORMATS = sizeof(formats)/sizeof(struct saa7146_format); - -struct saa7146_format* format_by_fourcc(struct saa7146_dev *dev, int fourcc) -{ - int i, j = NUM_FORMATS; - - for (i = 0; i < j; i++) { - if (formats[i].pixelformat == fourcc) { - return formats+i; - } - } - - DEB_D(("unknown pixelformat:'%4.4s'\n",(char *)&fourcc)); - return NULL; -} - -static int g_fmt(struct saa7146_fh *fh, struct v4l2_format *f) -{ - struct saa7146_dev *dev = fh->dev; - DEB_EE(("dev:%p, fh:%p\n",dev,fh)); - - switch (f->type) { - case V4L2_BUF_TYPE_VIDEO_CAPTURE: - f->fmt.pix = fh->video_fmt; - return 0; - case V4L2_BUF_TYPE_VIDEO_OVERLAY: - f->fmt.win = fh->ov.win; - return 0; - case V4L2_BUF_TYPE_VBI_CAPTURE: - { - f->fmt.vbi = fh->vbi_fmt; - return 0; - } - default: - DEB_D(("invalid format type '%d'.\n",f->type)); - return -EINVAL; - } -} - -static int try_win(struct saa7146_dev *dev, struct v4l2_window *win) -{ - struct saa7146_vv *vv = dev->vv_data; - 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 try_fmt(struct saa7146_fh *fh, struct v4l2_format *f) -{ - struct saa7146_dev *dev = fh->dev; - struct saa7146_vv *vv = dev->vv_data; - int err; - - switch (f->type) { - case V4L2_BUF_TYPE_VIDEO_CAPTURE: - { - 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 = 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; - 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; - } - case V4L2_BUF_TYPE_VIDEO_OVERLAY: - DEB_EE(("V4L2_BUF_TYPE_VIDEO_OVERLAY: dev:%p, fh:%p\n",dev,fh)); - err = try_win(dev,&f->fmt.win); - if (0 != err) { - return err; - } - return 0; - default: - DEB_EE(("unknown format type '%d'\n",f->type)); - return -EINVAL; - } -} - -int saa7146_start_preview(struct saa7146_fh *fh) -{ - struct saa7146_dev *dev = fh->dev; - struct saa7146_vv *vv = dev->vv_data; - int ret = 0, err = 0; - - DEB_EE(("dev:%p, fh:%p\n",dev,fh)); - - /* check if we have overlay informations */ - if( NULL == fh->ov.fh ) { - DEB_D(("no overlay data available. try S_FMT first.\n")); - return -EAGAIN; - } - - /* check if streaming capture is running */ - if (IS_CAPTURE_ACTIVE(fh) != 0) { - DEB_D(("streaming capture is active.\n")); - return -EBUSY; - } - - /* check if overlay is running */ - if (IS_OVERLAY_ACTIVE(fh) != 0) { - if (vv->video_fh == fh) { - DEB_D(("overlay is already active.\n")); - return 0; - } - DEB_D(("overlay is already active in another open.\n")); - return -EBUSY; - } - - if (0 == saa7146_res_get(fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP)) { - DEB_D(("cannot get necessary overlay resources\n")); - return -EBUSY; - } - - err = try_win(dev,&fh->ov.win); - if (0 != err) { - saa7146_res_free(vv->video_fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP); - return -EBUSY; - } - - vv->ov_data = &fh->ov; - - DEB_D(("%dx%d+%d+%d %s field=%s\n", - fh->ov.win.w.width,fh->ov.win.w.height, - fh->ov.win.w.left,fh->ov.win.w.top, - vv->ov_fmt->name,v4l2_field_names[fh->ov.win.field])); - - if (0 != (ret = saa7146_enable_overlay(fh))) { - DEB_D(("enabling overlay failed: %d\n",ret)); - saa7146_res_free(vv->video_fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP); - return ret; - } - - vv->video_status = STATUS_OVERLAY; - vv->video_fh = fh; - - return 0; -} -EXPORT_SYMBOL_GPL(saa7146_start_preview); - -int saa7146_stop_preview(struct saa7146_fh *fh) -{ - struct saa7146_dev *dev = fh->dev; - struct saa7146_vv *vv = dev->vv_data; - - DEB_EE(("dev:%p, fh:%p\n",dev,fh)); - - /* check if streaming capture is running */ - if (IS_CAPTURE_ACTIVE(fh) != 0) { - DEB_D(("streaming capture is active.\n")); - return -EBUSY; - } - - /* check if overlay is running at all */ - if ((vv->video_status & STATUS_OVERLAY) == 0) { - DEB_D(("no active overlay.\n")); - return 0; - } - - if (vv->video_fh != fh) { - DEB_D(("overlay is active, but in another open.\n")); - return -EBUSY; - } - - vv->video_status = 0; - vv->video_fh = NULL; - - saa7146_disable_overlay(fh); - - saa7146_res_free(fh, RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP); - - return 0; -} -EXPORT_SYMBOL_GPL(saa7146_stop_preview); - -static int s_fmt(struct saa7146_fh *fh, struct v4l2_format *f) -{ - struct saa7146_dev *dev = fh->dev; - struct saa7146_vv *vv = dev->vv_data; - - int err; - - switch (f->type) { - case V4L2_BUF_TYPE_VIDEO_CAPTURE: - 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 = try_fmt(fh,f); - if (0 != err) - return err; - fh->video_fmt = f->fmt.pix; - DEB_EE(("set to pixelformat '%4.4s'\n",(char *)&fh->video_fmt.pixelformat)); - return 0; - case V4L2_BUF_TYPE_VIDEO_OVERLAY: - DEB_EE(("V4L2_BUF_TYPE_VIDEO_OVERLAY: dev:%p, fh:%p\n",dev,fh)); - err = try_win(dev,&f->fmt.win); - if (0 != err) - return err; - mutex_lock(&dev->lock); - fh->ov.win = f->fmt.win; - fh->ov.nclips = f->fmt.win.clipcount; - if (fh->ov.nclips > 16) - fh->ov.nclips = 16; - if (copy_from_user(fh->ov.clips,f->fmt.win.clips,sizeof(struct v4l2_clip)*fh->ov.nclips)) { - mutex_unlock(&dev->lock); - return -EFAULT; - } - - /* fh->ov.fh is used to indicate that we have valid overlay informations, too */ - fh->ov.fh = fh; - - mutex_unlock(&dev->lock); - - /* check if our current overlay is active */ - if (IS_OVERLAY_ACTIVE(fh) != 0) { - saa7146_stop_preview(fh); - saa7146_start_preview(fh); - } - return 0; - default: - DEB_D(("unknown format type '%d'\n",f->type)); - return -EINVAL; - } -} - -/********************************************************************************/ -/* device controls */ - -static struct v4l2_queryctrl controls[] = { - { - .id = V4L2_CID_BRIGHTNESS, - .name = "Brightness", - .minimum = 0, - .maximum = 255, - .step = 1, - .default_value = 128, - .type = V4L2_CTRL_TYPE_INTEGER, - },{ - .id = V4L2_CID_CONTRAST, - .name = "Contrast", - .minimum = 0, - .maximum = 127, - .step = 1, - .default_value = 64, - .type = V4L2_CTRL_TYPE_INTEGER, - },{ - .id = V4L2_CID_SATURATION, - .name = "Saturation", - .minimum = 0, - .maximum = 127, - .step = 1, - .default_value = 64, - .type = V4L2_CTRL_TYPE_INTEGER, - },{ - .id = V4L2_CID_VFLIP, - .name = "Vertical flip", - .minimum = 0, - .maximum = 1, - .type = V4L2_CTRL_TYPE_BOOLEAN, - },{ - .id = V4L2_CID_HFLIP, - .name = "Horizontal flip", - .minimum = 0, - .maximum = 1, - .type = V4L2_CTRL_TYPE_BOOLEAN, - }, -}; -static int NUM_CONTROLS = sizeof(controls)/sizeof(struct v4l2_queryctrl); - -#define V4L2_CID_PRIVATE_LASTP1 (V4L2_CID_PRIVATE_BASE + 0) - -static struct v4l2_queryctrl* ctrl_by_id(int id) -{ - int i; - - for (i = 0; i < NUM_CONTROLS; i++) - if (controls[i].id == id) - return controls+i; - return NULL; -} - -static int get_control(struct saa7146_fh *fh, struct v4l2_control *c) -{ - struct saa7146_dev *dev = fh->dev; - struct saa7146_vv *vv = dev->vv_data; - - const struct v4l2_queryctrl* ctrl; - u32 value = 0; - - ctrl = ctrl_by_id(c->id); - if (NULL == ctrl) - return -EINVAL; - switch (c->id) { - case V4L2_CID_BRIGHTNESS: - value = saa7146_read(dev, BCS_CTRL); - c->value = 0xff & (value >> 24); - DEB_D(("V4L2_CID_BRIGHTNESS: %d\n",c->value)); - break; - case V4L2_CID_CONTRAST: - value = saa7146_read(dev, BCS_CTRL); - c->value = 0x7f & (value >> 16); - DEB_D(("V4L2_CID_CONTRAST: %d\n",c->value)); - break; - case V4L2_CID_SATURATION: - value = saa7146_read(dev, BCS_CTRL); - c->value = 0x7f & (value >> 0); - DEB_D(("V4L2_CID_SATURATION: %d\n",c->value)); - break; - case V4L2_CID_VFLIP: - c->value = vv->vflip; - DEB_D(("V4L2_CID_VFLIP: %d\n",c->value)); - break; - case V4L2_CID_HFLIP: - c->value = vv->hflip; - DEB_D(("V4L2_CID_HFLIP: %d\n",c->value)); - break; - default: - return -EINVAL; - } - - return 0; -} - -static int set_control(struct saa7146_fh *fh, struct v4l2_control *c) -{ - struct saa7146_dev *dev = fh->dev; - struct saa7146_vv *vv = dev->vv_data; - - const struct v4l2_queryctrl* ctrl; - - ctrl = ctrl_by_id(c->id); - if (NULL == ctrl) { - DEB_D(("unknown control %d\n",c->id)); - return -EINVAL; - } - - mutex_lock(&dev->lock); - - switch (ctrl->type) { - case V4L2_CTRL_TYPE_BOOLEAN: - case V4L2_CTRL_TYPE_MENU: - case V4L2_CTRL_TYPE_INTEGER: - if (c->value < ctrl->minimum) - c->value = ctrl->minimum; - if (c->value > ctrl->maximum) - c->value = ctrl->maximum; - break; - default: - /* nothing */; - }; - - switch (c->id) { - case V4L2_CID_BRIGHTNESS: { - u32 value = saa7146_read(dev, BCS_CTRL); - value &= 0x00ffffff; - value |= (c->value << 24); - saa7146_write(dev, BCS_CTRL, value); - saa7146_write(dev, MC2, MASK_22 | MASK_06 ); - break; - } - case V4L2_CID_CONTRAST: { - u32 value = saa7146_read(dev, BCS_CTRL); - value &= 0xff00ffff; - value |= (c->value << 16); - saa7146_write(dev, BCS_CTRL, value); - saa7146_write(dev, MC2, MASK_22 | MASK_06 ); - break; - } - case V4L2_CID_SATURATION: { - u32 value = saa7146_read(dev, BCS_CTRL); - value &= 0xffffff00; - value |= (c->value << 0); - saa7146_write(dev, BCS_CTRL, value); - saa7146_write(dev, MC2, MASK_22 | MASK_06 ); - break; - } - case V4L2_CID_HFLIP: - /* fixme: we can support changing VFLIP and HFLIP here... */ - if (IS_CAPTURE_ACTIVE(fh) != 0) { - DEB_D(("V4L2_CID_HFLIP while active capture.\n")); - mutex_unlock(&dev->lock); - return -EINVAL; - } - vv->hflip = c->value; - break; - case V4L2_CID_VFLIP: - if (IS_CAPTURE_ACTIVE(fh) != 0) { - DEB_D(("V4L2_CID_VFLIP while active capture.\n")); - mutex_unlock(&dev->lock); - return -EINVAL; - } - vv->vflip = c->value; - break; - default: { - return -EINVAL; - } - } - mutex_unlock(&dev->lock); - - if (IS_OVERLAY_ACTIVE(fh) != 0) { - saa7146_stop_preview(fh); - saa7146_start_preview(fh); - } - return 0; -} - -/********************************************************************************/ -/* common pagetable functions */ - -static int saa7146_pgtable_build(struct saa7146_dev *dev, struct saa7146_buf *buf) -{ - struct pci_dev *pci = dev->pci; - struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb); - struct scatterlist *list = dma->sglist; - int length = dma->sglen; - struct saa7146_format *sfmt = format_by_fourcc(dev,buf->fmt->pixelformat); - - DEB_EE(("dev:%p, buf:%p, sg_len:%d\n",dev,buf,length)); - - if( 0 != IS_PLANAR(sfmt->trans)) { - struct saa7146_pgtable *pt1 = &buf->pt[0]; - struct saa7146_pgtable *pt2 = &buf->pt[1]; - struct saa7146_pgtable *pt3 = &buf->pt[2]; - u32 *ptr1, *ptr2, *ptr3; - u32 fill; - - int size = buf->fmt->width*buf->fmt->height; - int i,p,m1,m2,m3,o1,o2; - - switch( sfmt->depth ) { - case 12: { - /* create some offsets inside the page table */ - m1 = ((size+PAGE_SIZE)/PAGE_SIZE)-1; - m2 = ((size+(size/4)+PAGE_SIZE)/PAGE_SIZE)-1; - m3 = ((size+(size/2)+PAGE_SIZE)/PAGE_SIZE)-1; - o1 = size%PAGE_SIZE; - o2 = (size+(size/4))%PAGE_SIZE; - DEB_CAP(("size:%d, m1:%d, m2:%d, m3:%d, o1:%d, o2:%d\n",size,m1,m2,m3,o1,o2)); - break; - } - case 16: { - /* create some offsets inside the page table */ - m1 = ((size+PAGE_SIZE)/PAGE_SIZE)-1; - m2 = ((size+(size/2)+PAGE_SIZE)/PAGE_SIZE)-1; - m3 = ((2*size+PAGE_SIZE)/PAGE_SIZE)-1; - o1 = size%PAGE_SIZE; - o2 = (size+(size/2))%PAGE_SIZE; - DEB_CAP(("size:%d, m1:%d, m2:%d, m3:%d, o1:%d, o2:%d\n",size,m1,m2,m3,o1,o2)); - break; - } - default: { - return -1; - } - } - - ptr1 = pt1->cpu; - ptr2 = pt2->cpu; - ptr3 = pt3->cpu; - - /* walk all pages, copy all page addresses to ptr1 */ - for (i = 0; i < length; i++, list++) { - for (p = 0; p * 4096 < list->length; p++, ptr1++) { - *ptr1 = cpu_to_le32(sg_dma_address(list) - list->offset); - } - } -/* - ptr1 = pt1->cpu; - for(j=0;j<40;j++) { - printk("ptr1 %d: 0x%08x\n",j,ptr1[j]); - } -*/ - - /* if we have a user buffer, the first page may not be - aligned to a page boundary. */ - pt1->offset = list->offset; - pt2->offset = pt1->offset+o1; - pt3->offset = pt1->offset+o2; - - /* create video-dma2 page table */ - ptr1 = pt1->cpu; - for(i = m1; i <= m2 ; i++, ptr2++) { - *ptr2 = ptr1[i]; - } - fill = *(ptr2-1); - for(;i<1024;i++,ptr2++) { - *ptr2 = fill; - } - /* create video-dma3 page table */ - ptr1 = pt1->cpu; - for(i = m2; i <= m3; i++,ptr3++) { - *ptr3 = ptr1[i]; - } - fill = *(ptr3-1); - for(;i<1024;i++,ptr3++) { - *ptr3 = fill; - } - /* finally: finish up video-dma1 page table */ - ptr1 = pt1->cpu+m1; - fill = pt1->cpu[m1]; - for(i=m1;i<1024;i++,ptr1++) { - *ptr1 = fill; - } -/* - ptr1 = pt1->cpu; - ptr2 = pt2->cpu; - ptr3 = pt3->cpu; - for(j=0;j<40;j++) { - printk("ptr1 %d: 0x%08x\n",j,ptr1[j]); - } - for(j=0;j<40;j++) { - printk("ptr2 %d: 0x%08x\n",j,ptr2[j]); - } - for(j=0;j<40;j++) { - printk("ptr3 %d: 0x%08x\n",j,ptr3[j]); - } -*/ - } else { - struct saa7146_pgtable *pt = &buf->pt[0]; - return saa7146_pgtable_build_single(pci, pt, list, length); - } - - return 0; -} - - -/********************************************************************************/ -/* file operations */ - -static int video_begin(struct saa7146_fh *fh) -{ - struct saa7146_dev *dev = fh->dev; - struct saa7146_vv *vv = dev->vv_data; - struct saa7146_format *fmt = NULL; - unsigned int resource; - int ret = 0, err = 0; - - DEB_EE(("dev:%p, fh:%p\n",dev,fh)); - - if ((vv->video_status & STATUS_CAPTURE) != 0) { - if (vv->video_fh == fh) { - DEB_S(("already capturing.\n")); - return 0; - } - DEB_S(("already capturing in another open.\n")); - return -EBUSY; - } - - if ((vv->video_status & STATUS_OVERLAY) != 0) { - DEB_S(("warning: suspending overlay video for streaming capture.\n")); - 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; - } - } - - fmt = format_by_fourcc(dev,fh->video_fmt.pixelformat); - /* we need to have a valid format set here */ - BUG_ON(NULL == fmt); - - if (0 != (fmt->flags & FORMAT_IS_PLANAR)) { - resource = RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP|RESOURCE_DMA3_BRS; - } else { - resource = RESOURCE_DMA1_HPS; - } - - ret = saa7146_res_get(fh, resource); - if (0 == ret) { - DEB_S(("cannot get capture resource %d\n",resource)); - if (vv->ov_suspend != NULL) { - saa7146_start_preview(vv->ov_suspend); - vv->ov_suspend = NULL; - } - return -EBUSY; - } - - /* clear out beginning of streaming bit (rps register 0)*/ - saa7146_write(dev, MC2, MASK_27 ); - - /* enable rps0 irqs */ - SAA7146_IER_ENABLE(dev, MASK_27); - - vv->video_fh = fh; - vv->video_status = STATUS_CAPTURE; - - return 0; -} - -static int video_end(struct saa7146_fh *fh, struct file *file) -{ - struct saa7146_dev *dev = fh->dev; - struct saa7146_vv *vv = dev->vv_data; - struct saa7146_format *fmt = NULL; - unsigned long flags; - unsigned int resource; - u32 dmas = 0; - DEB_EE(("dev:%p, fh:%p\n",dev,fh)); - - 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; - } - - fmt = format_by_fourcc(dev,fh->video_fmt.pixelformat); - /* we need to have a valid format set here */ - BUG_ON(NULL == fmt); - - if (0 != (fmt->flags & FORMAT_IS_PLANAR)) { - resource = RESOURCE_DMA1_HPS|RESOURCE_DMA2_CLP|RESOURCE_DMA3_BRS; - dmas = MASK_22 | MASK_21 | MASK_20; - } else { - resource = RESOURCE_DMA1_HPS; - dmas = MASK_22; - } - spin_lock_irqsave(&dev->slock,flags); - - /* disable rps0 */ - saa7146_write(dev, MC1, MASK_28); - - /* disable rps0 irqs */ - SAA7146_IER_DISABLE(dev, MASK_27); - - /* shut down all used video dma transfers */ - saa7146_write(dev, MC1, dmas); - - spin_unlock_irqrestore(&dev->slock, flags); - - vv->video_fh = NULL; - vv->video_status = 0; - - saa7146_res_free(fh, resource); - - if (vv->ov_suspend != NULL) { - saa7146_start_preview(vv->ov_suspend); - vv->ov_suspend = NULL; - } - - return 0; -} - -/* - * This function is _not_ called directly, but from - * video_generic_ioctl (and maybe others). userspace - * copying is done already, arg is a kernel pointer. - */ - -int saa7146_video_do_ioctl(struct inode *inode, struct file *file, unsigned int cmd, void *arg) -{ - struct saa7146_fh *fh = file->private_data; - struct saa7146_dev *dev = fh->dev; - struct saa7146_vv *vv = dev->vv_data; - - int err = 0, result = 0, ee = 0; - - struct saa7146_use_ops *ops; - struct videobuf_queue *q; - - /* check if extension handles the command */ - for(ee = 0; dev->ext_vv_data->ioctls[ee].flags != 0; ee++) { - if( cmd == dev->ext_vv_data->ioctls[ee].cmd ) - break; - } - - if( 0 != (dev->ext_vv_data->ioctls[ee].flags & SAA7146_EXCLUSIVE) ) { - DEB_D(("extension handles ioctl exclusive.\n")); - result = dev->ext_vv_data->ioctl(fh, cmd, arg); - return result; - } - if( 0 != (dev->ext_vv_data->ioctls[ee].flags & SAA7146_BEFORE) ) { - DEB_D(("extension handles ioctl before.\n")); - result = dev->ext_vv_data->ioctl(fh, cmd, arg); - if( -EAGAIN != result ) { - return result; - } - } - - /* fixme: add handle "after" case (is it still needed?) */ - - switch (fh->type) { - case V4L2_BUF_TYPE_VIDEO_CAPTURE: { - ops = &saa7146_video_uops; - q = &fh->video_q; - break; - } - case V4L2_BUF_TYPE_VBI_CAPTURE: { - ops = &saa7146_vbi_uops; - q = &fh->vbi_q; - break; - } - default: - BUG(); - return 0; - } - - switch (cmd) { - case VIDIOC_QUERYCAP: - { - struct v4l2_capability *cap = arg; - memset(cap,0,sizeof(*cap)); - - DEB_EE(("VIDIOC_QUERYCAP\n")); - - strcpy((char *)cap->driver, "saa7146 v4l2"); - strlcpy((char *)cap->card, dev->ext->name, sizeof(cap->card)); - sprintf((char *)cap->bus_info,"PCI:%s", pci_name(dev->pci)); - cap->version = SAA7146_VERSION_CODE; - cap->capabilities = - V4L2_CAP_VIDEO_CAPTURE | - V4L2_CAP_VIDEO_OVERLAY | - V4L2_CAP_READWRITE | - V4L2_CAP_STREAMING; - cap->capabilities |= dev->ext_vv_data->capabilities; - return 0; - } - case VIDIOC_G_FBUF: - { - struct v4l2_framebuffer *fb = arg; - - DEB_EE(("VIDIOC_G_FBUF\n")); - - *fb = vv->ov_fb; - fb->capability = V4L2_FBUF_CAP_LIST_CLIPPING; - return 0; - } - case VIDIOC_S_FBUF: - { - struct v4l2_framebuffer *fb = arg; - struct saa7146_format *fmt; - - DEB_EE(("VIDIOC_S_FBUF\n")); - - if(!capable(CAP_SYS_ADMIN) && - !capable(CAP_SYS_RAWIO)) - return -EPERM; - - /* check args */ - fmt = format_by_fourcc(dev,fb->fmt.pixelformat); - if (NULL == fmt) { - return -EINVAL; - } - - /* planar formats are not allowed for overlay video, clipping and video dma would clash */ - if (0 != (fmt->flags & FORMAT_IS_PLANAR)) { - DEB_S(("planar pixelformat '%4.4s' not allowed for overlay\n",(char *)&fmt->pixelformat)); - } - - /* check if overlay is running */ - if (IS_OVERLAY_ACTIVE(fh) != 0) { - if (vv->video_fh != fh) { - DEB_D(("refusing to change framebuffer informations while overlay is active in another open.\n")); - return -EBUSY; - } - } - - mutex_lock(&dev->lock); - - /* ok, accept it */ - vv->ov_fb = *fb; - vv->ov_fmt = fmt; - if (0 == vv->ov_fb.fmt.bytesperline) - vv->ov_fb.fmt.bytesperline = - vv->ov_fb.fmt.width*fmt->depth/8; - - mutex_unlock(&dev->lock); - - return 0; - } - case VIDIOC_ENUM_FMT: - { - struct v4l2_fmtdesc *f = arg; - int index; - - switch (f->type) { - case V4L2_BUF_TYPE_VIDEO_CAPTURE: - case V4L2_BUF_TYPE_VIDEO_OVERLAY: { - index = f->index; - if (index < 0 || index >= NUM_FORMATS) { - return -EINVAL; - } - memset(f,0,sizeof(*f)); - f->index = index; - strlcpy((char *)f->description,formats[index].name,sizeof(f->description)); - f->pixelformat = formats[index].pixelformat; - break; - } - default: - return -EINVAL; - } - - DEB_EE(("VIDIOC_ENUM_FMT: type:%d, index:%d\n",f->type,f->index)); - return 0; - } - case VIDIOC_QUERYCTRL: - { - const struct v4l2_queryctrl *ctrl; - struct v4l2_queryctrl *c = arg; - - if ((c->id < V4L2_CID_BASE || - c->id >= V4L2_CID_LASTP1) && - (c->id < V4L2_CID_PRIVATE_BASE || - c->id >= V4L2_CID_PRIVATE_LASTP1)) - return -EINVAL; - - ctrl = ctrl_by_id(c->id); - if( NULL == ctrl ) { - return -EINVAL; -/* - c->flags = V4L2_CTRL_FLAG_DISABLED; - return 0; -*/ - } - - DEB_EE(("VIDIOC_QUERYCTRL: id:%d\n",c->id)); - *c = *ctrl; - return 0; - } - case VIDIOC_G_CTRL: { - DEB_EE(("VIDIOC_G_CTRL\n")); - return get_control(fh,arg); - } - case VIDIOC_S_CTRL: - { - DEB_EE(("VIDIOC_S_CTRL\n")); - err = set_control(fh,arg); - return err; - } - case VIDIOC_G_PARM: - { - struct v4l2_streamparm *parm = arg; - if( parm->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ) { - return -EINVAL; - } - memset(&parm->parm.capture,0,sizeof(struct v4l2_captureparm)); - parm->parm.capture.readbuffers = 1; - // fixme: only for PAL! - parm->parm.capture.timeperframe.numerator = 1; - parm->parm.capture.timeperframe.denominator = 25; - return 0; - } - case VIDIOC_G_FMT: - { - struct v4l2_format *f = arg; - DEB_EE(("VIDIOC_G_FMT\n")); - return g_fmt(fh,f); - } - case VIDIOC_S_FMT: - { - struct v4l2_format *f = arg; - DEB_EE(("VIDIOC_S_FMT\n")); - return s_fmt(fh,f); - } - case VIDIOC_TRY_FMT: - { - struct v4l2_format *f = arg; - DEB_EE(("VIDIOC_TRY_FMT\n")); - return try_fmt(fh,f); - } - case VIDIOC_G_STD: - { - v4l2_std_id *id = arg; - DEB_EE(("VIDIOC_G_STD\n")); - *id = 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; - } - case VIDIOC_S_STD: - { - v4l2_std_id *id = arg; - int found = 0; - int i, err; - - 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; - } - } - - mutex_lock(&dev->lock); - - 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; - } - - mutex_unlock(&dev->lock); - - if (vv->ov_suspend != NULL) { - saa7146_start_preview(vv->ov_suspend); - vv->ov_suspend = NULL; - } - - if( 0 == 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; - } - case VIDIOC_OVERLAY: - { - int on = *(int *)arg; - int err = 0; - - DEB_D(("VIDIOC_OVERLAY on:%d\n",on)); - if (on != 0) { - err = saa7146_start_preview(fh); - } else { - err = saa7146_stop_preview(fh); - } - return err; - } - case VIDIOC_REQBUFS: { - struct v4l2_requestbuffers *req = arg; - DEB_D(("VIDIOC_REQBUFS, type:%d\n",req->type)); - return videobuf_reqbufs(q,req); - } - case VIDIOC_QUERYBUF: { - struct v4l2_buffer *buf = arg; - DEB_D(("VIDIOC_QUERYBUF, type:%d, offset:%d\n",buf->type,buf->m.offset)); - return videobuf_querybuf(q,buf); - } - case VIDIOC_QBUF: { - struct v4l2_buffer *buf = arg; - int ret = 0; - ret = videobuf_qbuf(q,buf); - DEB_D(("VIDIOC_QBUF: ret:%d, index:%d\n",ret,buf->index)); - return ret; - } - case VIDIOC_DQBUF: { - struct v4l2_buffer *buf = arg; - int ret = 0; - ret = videobuf_dqbuf(q,buf,file->f_flags & O_NONBLOCK); - DEB_D(("VIDIOC_DQBUF: ret:%d, index:%d\n",ret,buf->index)); - return ret; - } - case VIDIOC_STREAMON: { - int *type = arg; - DEB_D(("VIDIOC_STREAMON, type:%d\n",*type)); - - err = video_begin(fh); - if( 0 != err) { - return err; - } - err = videobuf_streamon(q); - return err; - } - case VIDIOC_STREAMOFF: { - int *type = arg; - - 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 = videobuf_streamoff(q); - if (0 != err) { - DEB_D(("warning: videobuf_streamoff() failed.\n")); - video_end(fh, file); - } else { - err = video_end(fh, file); - } - return err; - } -#ifdef CONFIG_VIDEO_V4L1_COMPAT - case VIDIOCGMBUF: - { - struct video_mbuf *mbuf = arg; - struct videobuf_queue *q; - int i; - - /* fixme: number of capture buffers and sizes for v4l apps */ - int gbuffers = 2; - int gbufsize = 768*576*4; - - DEB_D(("VIDIOCGMBUF \n")); - - q = &fh->video_q; - err = videobuf_mmap_setup(q,gbuffers,gbufsize, - V4L2_MEMORY_MMAP); - if (err < 0) - return err; - - gbuffers = err; - memset(mbuf,0,sizeof(*mbuf)); - mbuf->frames = gbuffers; - mbuf->size = gbuffers * gbufsize; - for (i = 0; i < gbuffers; i++) - mbuf->offsets[i] = i * gbufsize; - return 0; - } -#endif - default: - return v4l_compat_translate_ioctl(inode,file,cmd,arg, - saa7146_video_do_ioctl); - } - return 0; -} - -/*********************************************************************************/ -/* 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_q.timeout, jiffies+BUFFER_TIMEOUT); - return 0; -} - -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 (fh->video_fmt.width < 48 || - fh->video_fmt.height < 32 || - fh->video_fmt.width > vv->standard->h_max_out || - fh->video_fmt.height > vv->standard->v_max_out) { - DEB_D(("w (%d) / h (%d) out of bounds.\n",fh->video_fmt.width,fh->video_fmt.height)); - return -EINVAL; - } - - size = fh->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", - fh->video_fmt.width,fh->video_fmt.height,size,v4l2_field_names[fh->video_fmt.field])); - if (buf->vb.width != fh->video_fmt.width || - buf->vb.bytesperline != fh->video_fmt.bytesperline || - buf->vb.height != fh->video_fmt.height || - buf->vb.size != size || - buf->vb.field != field || - buf->vb.field != fh->video_fmt.field || - buf->fmt != &fh->video_fmt) { - saa7146_dma_free(dev,q,buf); - } - - if (VIDEOBUF_NEEDS_INIT == buf->vb.state) { - struct saa7146_format *sfmt; - - buf->vb.bytesperline = fh->video_fmt.bytesperline; - buf->vb.width = fh->video_fmt.width; - buf->vb.height = fh->video_fmt.height; - buf->vb.size = size; - buf->vb.field = field; - buf->fmt = &fh->video_fmt; - buf->vb.field = fh->video_fmt.field; - - sfmt = format_by_fourcc(dev,buf->fmt->pixelformat); - - if( 0 != IS_PLANAR(sfmt->trans)) { - saa7146_pgtable_free(dev->pci, &buf->pt[0]); - saa7146_pgtable_free(dev->pci, &buf->pt[1]); - saa7146_pgtable_free(dev->pci, &buf->pt[2]); - - 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_free(dev->pci, &buf->pt[0]); - 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; - - if (0 == *count || *count > MAX_SAA7146_CAPTURE_BUFFERS) - *count = MAX_SAA7146_CAPTURE_BUFFERS; - - *size = fh->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_q,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); -} - -static 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_q.queue); - - init_timer(&vv->video_q.timeout); - vv->video_q.timeout.function = saa7146_buffer_timeout; - vv->video_q.timeout.data = (unsigned long)(&vv->video_q); - vv->video_q.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 = (struct saa7146_fh *)file->private_data; - struct saa7146_format *sfmt; - - fh->video_fmt.width = 384; - fh->video_fmt.height = 288; - fh->video_fmt.pixelformat = V4L2_PIX_FMT_BGR24; - fh->video_fmt.bytesperline = 0; - fh->video_fmt.field = V4L2_FIELD_ANY; - sfmt = format_by_fourcc(dev,fh->video_fmt.pixelformat); - fh->video_fmt.sizeimage = (fh->video_fmt.width * fh->video_fmt.height * sfmt->depth)/8; - - 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); - - return 0; -} - - -static void video_close(struct saa7146_dev *dev, struct file *file) -{ - struct saa7146_fh *fh = (struct saa7146_fh *)file->private_data; - struct saa7146_vv *vv = dev->vv_data; - struct videobuf_queue *q = &fh->video_q; - int err; - - if (IS_CAPTURE_ACTIVE(fh) != 0) { - err = video_end(fh, file); - } else if (IS_OVERLAY_ACTIVE(fh) != 0) { - err = saa7146_stop_preview(fh); - } - - videobuf_stop(q); - - /* hmm, why is this function declared void? */ - /* return err */ -} - - -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_q; - - 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; -} - -struct saa7146_use_ops saa7146_video_uops = { - .init = video_init, - .open = video_open, - .release = video_close, - .irq_done = video_irq_done, - .read = video_read, -}; |