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[media] v4l2: add core support for the new VIDIOC_ENUM_FREQ_BANDS ioctl 

This adds the usual core support code for this new ioctl.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Hans Verkuil 2012-07-05 06:37:08 -03:00 committed by Mauro Carvalho Chehab
parent 3d687b49ff
commit 82b655bfc3
4 changed files with 86 additions and 2 deletions
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1
drivers/media/video/v4l2-compat-ioctl32.c
View File

@ -1025,6 +1025,7 @@ long v4l2_compat_ioctl32(struct file *file, unsigned int cmd, unsigned long arg)
case VIDIOC_ENUM_DV_TIMINGS:
case VIDIOC_QUERY_DV_TIMINGS:
case VIDIOC_DV_TIMINGS_CAP:
case VIDIOC_ENUM_FREQ_BANDS:
ret = do_video_ioctl(file, cmd, arg);
break;

2
drivers/media/video/v4l2-dev.c
View File

@ -730,6 +730,8 @@ static void determine_valid_ioctls(struct video_device *vdev)
SET_VALID_IOCTL(ops, VIDIOC_UNSUBSCRIBE_EVENT, vidioc_unsubscribe_event);
SET_VALID_IOCTL(ops, VIDIOC_CREATE_BUFS, vidioc_create_bufs);
SET_VALID_IOCTL(ops, VIDIOC_PREPARE_BUF, vidioc_prepare_buf);
if (ops->vidioc_enum_freq_bands || ops->vidioc_g_tuner || ops->vidioc_g_modulator)
set_bit(_IOC_NR(VIDIOC_ENUM_FREQ_BANDS), valid_ioctls);
bitmap_andnot(vdev->valid_ioctls, valid_ioctls, vdev->valid_ioctls,
BASE_VIDIOC_PRIVATE);
}

83
drivers/media/video/v4l2-ioctl.c
View File

@ -825,6 +825,17 @@ static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only)
p->service_lines[1][i]);
}
static void v4l_print_freq_band(const void *arg, bool write_only)
{
const struct v4l2_frequency_band *p = arg;
pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, "
"rangelow=%u, rangehigh=%u, modulation=0x%x\n",
p->tuner, p->type, p->index,
p->capability, p->rangelow,
p->rangehigh, p->modulation);
}
static void v4l_print_u32(const void *arg, bool write_only)
{
pr_cont("value=%u\n", *(const u32 *)arg);
@ -1245,10 +1256,14 @@ static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops,
{
struct video_device *vfd = video_devdata(file);
struct v4l2_tuner *p = arg;
int err;
p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
return ops->vidioc_g_tuner(file, fh, p);
err = ops->vidioc_g_tuner(file, fh, p);
if (!err)
p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
return err;
}
static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops,
@ -1262,6 +1277,18 @@ static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops,
return ops->vidioc_s_tuner(file, fh, p);
}
static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops,
struct file *file, void *fh, void *arg)
{
struct v4l2_modulator *p = arg;
int err;
err = ops->vidioc_g_modulator(file, fh, p);
if (!err)
p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
return err;
}
static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops,
struct file *file, void *fh, void *arg)
{
@ -1805,6 +1832,57 @@ static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops,
return ops->vidioc_g_sliced_vbi_cap(file, fh, p);
}
static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops,
struct file *file, void *fh, void *arg)
{
struct video_device *vfd = video_devdata(file);
struct v4l2_frequency_band *p = arg;
enum v4l2_tuner_type type;
int err;
type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
if (type != p->type)
return -EINVAL;
if (ops->vidioc_enum_freq_bands)
return ops->vidioc_enum_freq_bands(file, fh, p);
if (ops->vidioc_g_tuner) {
struct v4l2_tuner t = {
.index = p->tuner,
.type = type,
};
err = ops->vidioc_g_tuner(file, fh, &t);
if (err)
return err;
p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS;
p->rangelow = t.rangelow;
p->rangehigh = t.rangehigh;
p->modulation = (type == V4L2_TUNER_RADIO) ?
V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
return 0;
}
if (ops->vidioc_g_modulator) {
struct v4l2_modulator m = {
.index = p->tuner,
};
if (type != V4L2_TUNER_RADIO)
return -EINVAL;
err = ops->vidioc_g_modulator(file, fh, &m);
if (err)
return err;
p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS;
p->rangelow = m.rangelow;
p->rangehigh = m.rangehigh;
p->modulation = (type == V4L2_TUNER_RADIO) ?
V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
return 0;
}
return -ENOTTY;
}
struct v4l2_ioctl_info {
unsigned int ioctl;
u32 flags;
@ -1886,7 +1964,7 @@ static struct v4l2_ioctl_info v4l2_ioctls[] = {
IOCTL_INFO_FNC(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)),
IOCTL_INFO_STD(VIDIOC_G_AUDOUT, vidioc_g_audout, v4l_print_audioout, 0),
IOCTL_INFO_STD(VIDIOC_S_AUDOUT, vidioc_s_audout, v4l_print_audioout, INFO_FL_PRIO),
IOCTL_INFO_STD(VIDIOC_G_MODULATOR, vidioc_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)),
IOCTL_INFO_FNC(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)),
IOCTL_INFO_STD(VIDIOC_S_MODULATOR, vidioc_s_modulator, v4l_print_modulator, INFO_FL_PRIO),
IOCTL_INFO_FNC(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)),
IOCTL_INFO_FNC(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO),
@ -1933,6 +2011,7 @@ static struct v4l2_ioctl_info v4l2_ioctls[] = {
IOCTL_INFO_STD(VIDIOC_ENUM_DV_TIMINGS, vidioc_enum_dv_timings, v4l_print_enum_dv_timings, 0),
IOCTL_INFO_STD(VIDIOC_QUERY_DV_TIMINGS, vidioc_query_dv_timings, v4l_print_dv_timings, 0),
IOCTL_INFO_STD(VIDIOC_DV_TIMINGS_CAP, vidioc_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, type)),
IOCTL_INFO_FNC(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0),
};
#define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)

2
include/media/v4l2-ioctl.h
View File

@ -230,6 +230,8 @@ struct v4l2_ioctl_ops {
struct v4l2_frequency *a);
int (*vidioc_s_frequency) (struct file *file, void *fh,
struct v4l2_frequency *a);
int (*vidioc_enum_freq_bands) (struct file *file, void *fh,
struct v4l2_frequency_band *band);
/* Sliced VBI cap */
int (*vidioc_g_sliced_vbi_cap) (struct file *file, void *fh,