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path: root/drivers/media/radio/radio-zoltrix.c
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Diffstat (limited to 'drivers/media/radio/radio-zoltrix.c')
-rw-r--r--drivers/media/radio/radio-zoltrix.c51
1 files changed, 34 insertions, 17 deletions
diff --git a/drivers/media/radio/radio-zoltrix.c b/drivers/media/radio/radio-zoltrix.c
index 51d57ed3b3e1..15b10bad6796 100644
--- a/drivers/media/radio/radio-zoltrix.c
+++ b/drivers/media/radio/radio-zoltrix.c
@@ -69,6 +69,7 @@ static int io = CONFIG_RADIO_ZOLTRIX_PORT;
static int radio_nr = -1;
struct zol_device {
+ unsigned long in_use;
int port;
int curvol;
unsigned long curfreq;
@@ -122,8 +123,11 @@ static int zol_setfreq(struct zol_device *dev, unsigned long freq)
unsigned int stereo = dev->stereo;
int i;
- if (freq == 0)
- return 1;
+ if (freq == 0) {
+ printk(KERN_WARNING "zoltrix: received zero freq. Failed to set.\n");
+ return -EINVAL;
+ }
+
m = (freq / 160 - 8800) * 2;
f = (unsigned long long) m + 0x4d1c;
@@ -245,8 +249,7 @@ static int vidioc_querycap(struct file *file, void *priv,
static int vidioc_g_tuner(struct file *file, void *priv,
struct v4l2_tuner *v)
{
- struct video_device *dev = video_devdata(file);
- struct zol_device *zol = dev->priv;
+ struct zol_device *zol = video_drvdata(file);
if (v->index > 0)
return -EINVAL;
@@ -276,19 +279,20 @@ static int vidioc_s_tuner(struct file *file, void *priv,
static int vidioc_s_frequency(struct file *file, void *priv,
struct v4l2_frequency *f)
{
- struct video_device *dev = video_devdata(file);
- struct zol_device *zol = dev->priv;
+ struct zol_device *zol = video_drvdata(file);
zol->curfreq = f->frequency;
- zol_setfreq(zol, zol->curfreq);
+ if (zol_setfreq(zol, zol->curfreq) != 0) {
+ printk(KERN_WARNING "zoltrix: Set frequency failed.\n");
+ return -EINVAL;
+ }
return 0;
}
static int vidioc_g_frequency(struct file *file, void *priv,
struct v4l2_frequency *f)
{
- struct video_device *dev = video_devdata(file);
- struct zol_device *zol = dev->priv;
+ struct zol_device *zol = video_drvdata(file);
f->type = V4L2_TUNER_RADIO;
f->frequency = zol->curfreq;
@@ -313,8 +317,7 @@ static int vidioc_queryctrl(struct file *file, void *priv,
static int vidioc_g_ctrl(struct file *file, void *priv,
struct v4l2_control *ctrl)
{
- struct video_device *dev = video_devdata(file);
- struct zol_device *zol = dev->priv;
+ struct zol_device *zol = video_drvdata(file);
switch (ctrl->id) {
case V4L2_CID_AUDIO_MUTE:
@@ -330,8 +333,7 @@ static int vidioc_g_ctrl(struct file *file, void *priv,
static int vidioc_s_ctrl(struct file *file, void *priv,
struct v4l2_control *ctrl)
{
- struct video_device *dev = video_devdata(file);
- struct zol_device *zol = dev->priv;
+ struct zol_device *zol = video_drvdata(file);
switch (ctrl->id) {
case V4L2_CID_AUDIO_MUTE:
@@ -347,7 +349,10 @@ static int vidioc_s_ctrl(struct file *file, void *priv,
return 0;
}
zol->stereo = 1;
- zol_setfreq(zol, zol->curfreq);
+ if (zol_setfreq(zol, zol->curfreq) != 0) {
+ printk(KERN_WARNING "zoltrix: Set frequency failed.\n");
+ return -EINVAL;
+ }
#if 0
/* FIXME: Implement stereo/mono switch on V4L2 */
if (v->mode & VIDEO_SOUND_STEREO) {
@@ -396,11 +401,22 @@ static int vidioc_s_audio(struct file *file, void *priv,
static struct zol_device zoltrix_unit;
+static int zoltrix_exclusive_open(struct inode *inode, struct file *file)
+{
+ return test_and_set_bit(0, &zoltrix_unit.in_use) ? -EBUSY : 0;
+}
+
+static int zoltrix_exclusive_release(struct inode *inode, struct file *file)
+{
+ clear_bit(0, &zoltrix_unit.in_use);
+ return 0;
+}
+
static const struct file_operations zoltrix_fops =
{
.owner = THIS_MODULE,
- .open = video_exclusive_open,
- .release = video_exclusive_release,
+ .open = zoltrix_exclusive_open,
+ .release = zoltrix_exclusive_release,
.ioctl = video_ioctl2,
#ifdef CONFIG_COMPAT
.compat_ioctl = v4l_compat_ioctl32,
@@ -427,6 +443,7 @@ static struct video_device zoltrix_radio = {
.name = "Zoltrix Radio Plus",
.fops = &zoltrix_fops,
.ioctl_ops = &zoltrix_ioctl_ops,
+ .release = video_device_release_empty,
};
static int __init zoltrix_init(void)
@@ -440,7 +457,7 @@ static int __init zoltrix_init(void)
return -ENXIO;
}
- zoltrix_radio.priv = &zoltrix_unit;
+ video_set_drvdata(&zoltrix_radio, &zoltrix_unit);
if (!request_region(io, 2, "zoltrix")) {
printk(KERN_ERR "zoltrix: port 0x%x already in use\n", io);
return -EBUSY;