int ivtv_v4l2_open(struct file *filp)
{
int res;
struct ivtv *itv = NULL;
struct ivtv_stream *s = NULL;
struct video_device *vdev = video_devdata(filp);
s = video_get_drvdata(vdev);
itv = s->itv;
mutex_lock(&itv->serialize_lock);
if (ivtv_init_on_first_open(itv)) {
IVTV_ERR("Failed to initialize on minor %d\n",
vdev->minor);
mutex_unlock(&itv->serialize_lock);
return -ENXIO;
}
res = ivtv_serialized_open(s, filp);
mutex_unlock(&itv->serialize_lock);
return res;
}
int ivtv_v4l2_open(struct inode *inode, struct file *filp)
{
int res, x, y = 0;
struct ivtv *itv = NULL;
struct ivtv_stream *s = NULL;
int minor = iminor(inode);
/* Find which card this open was on */
spin_lock(&ivtv_cards_lock);
for (x = 0; itv == NULL && x < ivtv_cards_active; x++) {
if (ivtv_cards[x] == NULL)
continue;
/* find out which stream this open was on */
for (y = 0; y < IVTV_MAX_STREAMS; y++) {
s = &ivtv_cards[x]->streams[y];
if (s->v4l2dev && s->v4l2dev->minor == minor) {
itv = ivtv_cards[x];
break;
}
}
}
spin_unlock(&ivtv_cards_lock);
if (itv == NULL) {
/* Couldn't find a device registered
on that minor, shouldn't happen! */
printk(KERN_WARNING "No ivtv device found on minor %d\n", minor);
return -ENXIO;
}
mutex_lock(&itv->serialize_lock);
if (ivtv_init_on_first_open(itv)) {
IVTV_ERR("Failed to initialize on minor %d\n", minor);
mutex_unlock(&itv->serialize_lock);
return -ENXIO;
}
res = ivtv_serialized_open(s, filp);
mutex_unlock(&itv->serialize_lock);
return res;
}
static int ivtv_serialized_open(struct ivtv_stream *s, struct file *filp)
{
#ifdef CONFIG_VIDEO_ADV_DEBUG
struct video_device *vdev = video_devdata(filp);
#endif
struct ivtv *itv = s->itv;
struct ivtv_open_id *item;
int res = 0;
IVTV_DEBUG_FILE("open %s\n", s->name);
#ifdef CONFIG_VIDEO_ADV_DEBUG
/* Unless ivtv_fw_debug is set, error out if firmware dead. */
if (ivtv_fw_debug) {
IVTV_WARN("Opening %s with dead firmware lockout disabled\n",
video_device_node_name(vdev));
IVTV_WARN("Selected firmware errors will be ignored\n");
} else {
#else
if (1) {
#endif
res = ivtv_firmware_check(itv, "ivtv_serialized_open");
if (res == -EAGAIN)
res = ivtv_firmware_check(itv, "ivtv_serialized_open");
if (res < 0)
return -EIO;
}
if (s->type == IVTV_DEC_STREAM_TYPE_MPG &&
test_bit(IVTV_F_S_CLAIMED, &itv->streams[IVTV_DEC_STREAM_TYPE_YUV].s_flags))
return -EBUSY;
if (s->type == IVTV_DEC_STREAM_TYPE_YUV &&
test_bit(IVTV_F_S_CLAIMED, &itv->streams[IVTV_DEC_STREAM_TYPE_MPG].s_flags))
return -EBUSY;
if (s->type == IVTV_DEC_STREAM_TYPE_YUV) {
if (read_reg(0x82c) == 0) {
IVTV_ERR("Tried to open YUV output device but need to send data to mpeg decoder before it can be used\n");
/* return -ENODEV; */
}
ivtv_udma_alloc(itv);
}
/* Allocate memory */
item = kzalloc(sizeof(struct ivtv_open_id), GFP_KERNEL);
if (NULL == item) {
IVTV_DEBUG_WARN("nomem on v4l2 open\n");
return -ENOMEM;
}
v4l2_fh_init(&item->fh, s->vdev);
if (res < 0) {
v4l2_fh_exit(&item->fh);
kfree(item);
return res;
}
item->itv = itv;
item->type = s->type;
item->open_id = itv->open_id++;
filp->private_data = &item->fh;
if (item->type == IVTV_ENC_STREAM_TYPE_RAD) {
/* Try to claim this stream */
if (ivtv_claim_stream(item, item->type)) {
/* No, it's already in use */
v4l2_fh_exit(&item->fh);
kfree(item);
return -EBUSY;
}
if (!test_bit(IVTV_F_I_RADIO_USER, &itv->i_flags)) {
if (atomic_read(&itv->capturing) > 0) {
/* switching to radio while capture is
in progress is not polite */
ivtv_release_stream(s);
v4l2_fh_exit(&item->fh);
kfree(item);
return -EBUSY;
}
}
/* Mark that the radio is being used. */
set_bit(IVTV_F_I_RADIO_USER, &itv->i_flags);
/* We have the radio */
ivtv_mute(itv);
/* Switch tuner to radio */
ivtv_call_all(itv, tuner, s_radio);
/* Select the correct audio input (i.e. radio tuner) */
ivtv_audio_set_io(itv);
if (itv->hw_flags & IVTV_HW_SAA711X) {
ivtv_call_hw(itv, IVTV_HW_SAA711X, video, s_crystal_freq,
SAA7115_FREQ_32_11_MHZ, SAA7115_FREQ_FL_APLL);
}
/* Done! Unmute and continue. */
ivtv_unmute(itv);
}
/* YUV or MPG Decoding Mode? */
if (s->type == IVTV_DEC_STREAM_TYPE_MPG) {
clear_bit(IVTV_F_I_DEC_YUV, &itv->i_flags);
} else if (s->type == IVTV_DEC_STREAM_TYPE_YUV) {
set_bit(IVTV_F_I_DEC_YUV, &itv->i_flags);
/* For yuv, we need to know the dma size before we start */
itv->dma_data_req_size =
1080 * ((itv->yuv_info.v4l2_src_h + 31) & ~31);
itv->yuv_info.stream_size = 0;
}
v4l2_fh_add(&item->fh);
return 0;
}
int ivtv_v4l2_open(struct file *filp)
{
int res;
struct ivtv *itv = NULL;
struct ivtv_stream *s = NULL;
struct video_device *vdev = video_devdata(filp);
s = video_get_drvdata(vdev);
itv = s->itv;
mutex_lock(&itv->serialize_lock);
if (ivtv_init_on_first_open(itv)) {
IVTV_ERR("Failed to initialize on device %s\n",
video_device_node_name(vdev));
mutex_unlock(&itv->serialize_lock);
return -ENXIO;
}
res = ivtv_serialized_open(s, filp);
mutex_unlock(&itv->serialize_lock);
return res;
}
