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_buf *buf = (struct saa7146_buf *)vb;
int err = 0;
int lines, llength, size;
lines = 16 * 2 ; /* 2 fields */
llength = vbi_pixel_to_capture;
size = lines * llength;
DEB_VBI("vb:%p\n", vb);
if (0 != buf->vb.baddr && buf->vb.bsize < size) {
DEB_VBI("size mismatch\n");
return -EINVAL;
}
if (buf->vb.size != size)
saa7146_dma_free(dev,q,buf);
if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb);
buf->vb.width = llength;
buf->vb.height = lines;
buf->vb.size = size;
buf->vb.field = field; // FIXME: check this
saa7146_pgtable_free(dev->pci, &buf->pt[2]);
saa7146_pgtable_alloc(dev->pci, &buf->pt[2]);
err = videobuf_iolock(q,&buf->vb, NULL);
if (err)
goto oops;
err = saa7146_pgtable_build_single(dev->pci, &buf->pt[2],
dma->sglist, dma->sglen);
if (0 != err)
return err;
}
buf->vb.state = VIDEOBUF_PREPARED;
buf->activate = buffer_activate;
return 0;
oops:
DEB_VBI("error out\n");
saa7146_dma_free(dev,q,buf);
return err;
}
void *saa7146_vmalloc_build_pgtable(struct pci_dev *pci, long length, struct saa7146_pgtable *pt)
{
int pages = (length+PAGE_SIZE-1)/PAGE_SIZE;
void *mem = vmalloc_32(length);
int slen = 0;
if (NULL == mem)
goto err_null;
if (!(pt->slist = vmalloc_to_sg(mem, pages)))
goto err_free_mem;
if (saa7146_pgtable_alloc(pci, pt))
goto err_free_slist;
pt->nents = pages;
slen = pci_map_sg(pci,pt->slist,pt->nents,PCI_DMA_FROMDEVICE);
if (0 == slen)
goto err_free_pgtable;
if (0 != saa7146_pgtable_build_single(pci, pt, pt->slist, slen))
goto err_unmap_sg;
return mem;
err_unmap_sg:
pci_unmap_sg(pci, pt->slist, pt->nents, PCI_DMA_FROMDEVICE);
err_free_pgtable:
saa7146_pgtable_free(pci, pt);
err_free_slist:
kfree(pt->slist);
pt->slist = NULL;
err_free_mem:
vfree(mem);
err_null:
return NULL;
}
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,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(dev->pci,&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,buf);
return err;
}
