| #include <media/saa7146_vv.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; |
| } |
| |
| 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; |
| } |
| |
| 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 scatterlist *list = buf->vb.dma.sglist; |
| int length = buf->vb.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 = buf->vb.dma.sglist->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(cap->driver, "saa7146 v4l2"); |
| strlcpy(cap->card, dev->ext->name, sizeof(cap->card)); |
| sprintf(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(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; |
| } |
| 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; |
| mutex_lock(&q->lock); |
| err = videobuf_mmap_setup(q,gbuffers,gbufsize, |
| V4L2_MEMORY_MMAP); |
| if (err < 0) { |
| mutex_unlock(&q->lock); |
| return err; |
| } |
| memset(mbuf,0,sizeof(*mbuf)); |
| mbuf->frames = gbuffers; |
| mbuf->size = gbuffers * gbufsize; |
| for (i = 0; i < gbuffers; i++) |
| mbuf->offsets[i] = i * gbufsize; |
| mutex_unlock(&q->lock); |
| return 0; |
| } |
| 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 = STATE_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 (STATE_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 = STATE_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_init(&fh->video_q, &video_qops, |
| dev->pci, &dev->slock, |
| V4L2_BUF_TYPE_VIDEO_CAPTURE, |
| V4L2_FIELD_INTERLACED, |
| sizeof(struct saa7146_buf), |
| file); |
| |
| mutex_init(&fh->video_q.lock); |
| |
| 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; |
| 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); |
| } |
| |
| /* 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,STATE_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, |
| }; |