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 = saa7146_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 = saa7146_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;
}
static int vidioc_s_fbuf(struct file *file, void *fh, struct v4l2_framebuffer *fb)
{
struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
struct saa7146_vv *vv = dev->vv_data;
struct saa7146_format *fmt;
DEB_EE(("VIDIOC_S_FBUF\n"));
if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO))
return -EPERM;
/* check args */
fmt = saa7146_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 (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 (vv->ov_fb.fmt.bytesperline < vv->ov_fb.fmt.width) {
vv->ov_fb.fmt.bytesperline = vv->ov_fb.fmt.width * fmt->depth / 8;
DEB_D(("setting bytesperline to %d\n", vv->ov_fb.fmt.bytesperline));
}
mutex_unlock(&dev->lock);
return 0;
}
static int video_open(struct saa7146_dev *dev, struct file *file)
{
struct saa7146_fh *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 = saa7146_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, &dev->v4l2_lock);
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;
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 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 = saa7146_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];
__le32 *ptr1, *ptr2, *ptr3;
__le32 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 = 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;
}
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 = 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;
}
