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authorOndrej Zary <linux@rainbow-software.org>2011-03-19 18:32:53 +0300
committerTakashi Iwai <tiwai@suse.de>2011-03-21 14:43:54 +0300
commit375d135818f32bbe7b3f071bd54d977c4ff8d84a (patch)
tree776c6a3597d05c6801bc19771b23e3cd0ee85f68 /sound/i2c
parent75eb1c311da47d32ba47825226e110df703b35d0 (diff)
downloadlinux-375d135818f32bbe7b3f071bd54d977c4ff8d84a.tar.xz
ALSA: tea575x-tuner: various improvements
Improve tea575x-tuner with various good things from radio-maestro: - extend frequency range to 50-150MHz - fix querycap(): card name, CAP_RADIO - improve g_tuner(): CAP_STEREO, stereo and tuned indication - improve g_frequency(): tuner index checking and reading frequency from HW - improve s_frequency(): tuner index and type checking Signed-off-by: Ondrej Zary <linux@rainbow-software.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/i2c')
-rw-r--r--sound/i2c/other/tea575x-tuner.c52
1 files changed, 38 insertions, 14 deletions
diff --git a/sound/i2c/other/tea575x-tuner.c b/sound/i2c/other/tea575x-tuner.c
index ee538f1ae846..9f35f378a17d 100644
--- a/sound/i2c/other/tea575x-tuner.c
+++ b/sound/i2c/other/tea575x-tuner.c
@@ -37,8 +37,8 @@ static int radio_nr = -1;
module_param(radio_nr, int, 0);
#define RADIO_VERSION KERNEL_VERSION(0, 0, 2)
-#define FREQ_LO (87 * 16000)
-#define FREQ_HI (108 * 16000)
+#define FREQ_LO (50UL * 16000)
+#define FREQ_HI (150UL * 16000)
/*
* definitions
@@ -77,15 +77,29 @@ static struct v4l2_queryctrl radio_qctrl[] = {
* lowlevel part
*/
+static void snd_tea575x_get_freq(struct snd_tea575x *tea)
+{
+ unsigned long freq;
+
+ freq = tea->ops->read(tea) & TEA575X_BIT_FREQ_MASK;
+ /* freq *= 12.5 */
+ freq *= 125;
+ freq /= 10;
+ /* crystal fixup */
+ if (tea->tea5759)
+ freq += tea->freq_fixup;
+ else
+ freq -= tea->freq_fixup;
+
+ tea->freq = freq * 16; /* from kHz */
+}
+
static void snd_tea575x_set_freq(struct snd_tea575x *tea)
{
unsigned long freq;
- freq = tea->freq / 16; /* to kHz */
- if (freq > 108000)
- freq = 108000;
- if (freq < 87000)
- freq = 87000;
+ freq = clamp(tea->freq, FREQ_LO, FREQ_HI);
+ freq /= 16; /* to kHz */
/* crystal fixup */
if (tea->tea5759)
freq -= tea->freq_fixup;
@@ -109,29 +123,33 @@ static int vidioc_querycap(struct file *file, void *priv,
{
struct snd_tea575x *tea = video_drvdata(file);
- strcpy(v->card, tea->tea5759 ? "TEA5759" : "TEA5757");
strlcpy(v->driver, "tea575x-tuner", sizeof(v->driver));
- strlcpy(v->card, "Maestro Radio", sizeof(v->card));
+ strlcpy(v->card, tea->tea5759 ? "TEA5759" : "TEA5757", sizeof(v->card));
sprintf(v->bus_info, "PCI");
v->version = RADIO_VERSION;
- v->capabilities = V4L2_CAP_TUNER;
+ v->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
return 0;
}
static int vidioc_g_tuner(struct file *file, void *priv,
struct v4l2_tuner *v)
{
+ struct snd_tea575x *tea = video_drvdata(file);
+
if (v->index > 0)
return -EINVAL;
+ tea->ops->read(tea);
+
strcpy(v->name, "FM");
v->type = V4L2_TUNER_RADIO;
+ v->capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO;
v->rangelow = FREQ_LO;
v->rangehigh = FREQ_HI;
- v->rxsubchans = V4L2_TUNER_SUB_MONO|V4L2_TUNER_SUB_STEREO;
- v->capability = V4L2_TUNER_CAP_LOW;
- v->audmode = V4L2_TUNER_MODE_MONO;
- v->signal = 0xffff;
+ v->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO;
+ v->audmode = tea->stereo ? V4L2_TUNER_MODE_STEREO : V4L2_TUNER_MODE_MONO;
+ v->signal = tea->tuned ? 0xffff : 0;
+
return 0;
}
@@ -148,7 +166,10 @@ static int vidioc_g_frequency(struct file *file, void *priv,
{
struct snd_tea575x *tea = video_drvdata(file);
+ if (f->tuner != 0)
+ return -EINVAL;
f->type = V4L2_TUNER_RADIO;
+ snd_tea575x_get_freq(tea);
f->frequency = tea->freq;
return 0;
}
@@ -158,6 +179,9 @@ static int vidioc_s_frequency(struct file *file, void *priv,
{
struct snd_tea575x *tea = video_drvdata(file);
+ if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO)
+ return -EINVAL;
+
if (f->frequency < FREQ_LO || f->frequency > FREQ_HI)
return -EINVAL;