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 vidioc_try_fmt_vid_cap(struct file *file, void *priv, struct v4l2_format *f)
{
struct unicorn_fmt *fmt;
enum v4l2_field field;
unsigned int maxw, maxh;
unsigned int minw, minh;
fmt = format_by_fourcc(f->fmt.pix.pixelformat);
if (NULL == fmt)
{
printk(KERN_INFO "%s format_by_fourcc_fail fmt == NULL format %d \n",__func__,f->fmt.pix.pixelformat);
return -EINVAL;
}
field = f->fmt.pix.field;
maxw = 1280;
maxh = 960;
minw = 160;
minh = 120;
if (f->fmt.pix.height < minh)
f->fmt.pix.height = minh;
if (f->fmt.pix.height > maxh)
f->fmt.pix.height = maxh;
if (f->fmt.pix.width < minw)
f->fmt.pix.width = minw;
if (f->fmt.pix.width > maxw)
f->fmt.pix.width = maxw;
f->fmt.pix.bytesperline = (f->fmt.pix.width * fmt->depth) >> 3;
f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
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;
}
static int video_open(struct file *file)
{
struct video_device *vdev = video_devdata(file);
struct cx25821_dev *dev = video_drvdata(file);
struct cx25821_fh *fh;
enum v4l2_buf_type type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
u32 pix_format;
printk("open dev=%s type=%s\n", video_device_node_name(vdev),
v4l2_type_names[type]);
/* allocate + initialize per filehandle data */
fh = kzalloc(sizeof(*fh), GFP_KERNEL);
if (NULL == fh)
return -ENOMEM;
lock_kernel();
file->private_data = fh;
fh->dev = dev;
fh->type = type;
fh->width = 720;
if (dev->tvnorm & V4L2_STD_PAL_BG || dev->tvnorm & V4L2_STD_PAL_DK)
fh->height = 576;
else
fh->height = 480;
dev->channel_opened = SRAM_CH01;
pix_format =
(dev->pixel_formats[dev->channel_opened] ==
PIXEL_FRMT_411) ? V4L2_PIX_FMT_Y41P : V4L2_PIX_FMT_YUYV;
fh->fmt = format_by_fourcc(pix_format);
v4l2_prio_open(&dev->prio, &fh->prio);
videobuf_queue_sg_init(&fh->vidq, &cx25821_video_qops,
&dev->pci->dev, &dev->slock,
V4L2_BUF_TYPE_VIDEO_CAPTURE,
V4L2_FIELD_INTERLACED,
sizeof(struct cx25821_buffer), fh);
dprintk(1, "post videobuf_queue_init()\n");
unlock_kernel();
return 0;
}
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;
}
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;
}
}
down(&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;
up(&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;
}
}
down(&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;
}
up(&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;
down(&q->lock);
err = videobuf_mmap_setup(q,gbuffers,gbufsize,
V4L2_MEMORY_MMAP);
if (err < 0) {
up(&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;
up(&q->lock);
return 0;
}
default:
return v4l_compat_translate_ioctl(inode,file,cmd,arg,
saa7146_video_do_ioctl);
}
return 0;
}
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;
}
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;
}
}
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;
}
static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
struct unicorn_fh *fh = priv;
struct unicorn_dev *dev = ((struct unicorn_fh *)priv)->dev;
int err;
if (fh) {
err = v4l2_prio_check(&dev->prio, &fh->prio);
if (0 != err)
{
printk(KERN_INFO "%s()v4l2_prio_check fail \n", __func__);
return err;
}
}
dprintk_video(1, dev->name, "%s()\n", __func__);
if(fh->input == MIRE_VIDEO_INPUT)
{
dprintk_video(1, dev->name, "%s() MIRE input selected\n", __func__);
}
else if(dev->sensor[fh->input]==NULL)
{
printk(KERN_INFO "%s() no device on this input %d \n", __func__,fh->input);
return -EINVAL;
}
err = vidioc_try_fmt_vid_cap(file, priv, f);
if (0 != err)
{
printk(KERN_WARNING "%s() vidioc_try_fmt_vid_cap fail\n", __func__);
return err;
}
fh->fmt = format_by_fourcc(f->fmt.pix.pixelformat);
fh->vidq.field = f->fmt.pix.field;
if (fh->fmt->fourcc != V4L2_PIX_FMT_YUYV){
printk(KERN_INFO "%s() expected 0x%x \n", __func__,V4L2_PIX_FMT_YUYV);
printk(KERN_INFO "%s()0x%x pixel format not supported \n", __func__,fh->fmt->fourcc);
return -EINVAL;
}
if(fh->input == MIRE_VIDEO_INPUT)
{
err = 0;
}
else
{
err = v4l2_subdev_call(dev->sensor[fh->input], video, s_fmt, f);
}
fh->width = f->fmt.pix.width;
fh->height = f->fmt.pix.height;
dprintk_video(1, dev->name, "%s() width=%d height=%d field=%d err=%d\n", __func__, fh->width,
fh->height, fh->vidq.field, err);
return err;
}
