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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>
This commit is contained in:
Ondrej Zary 2011-03-19 16:32:53 +01:00 committed by Takashi Iwai
parent 75eb1c311d
commit 375d135818
2 changed files with 42 additions and 16 deletions
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6
include/sound/tea575x-tuner.h
View File

@ -38,8 +38,10 @@ struct snd_tea575x {
struct snd_card *card;
struct video_device *vd; /* video device */
int dev_nr; /* requested device number + 1 */
int tea5759; /* 5759 chip is present */
int mute; /* Device is muted? */
bool tea5759; /* 5759 chip is present */
bool mute; /* Device is muted? */
bool stereo; /* receiving stereo */
bool tuned; /* tuned to a station */
unsigned int freq_fixup; /* crystal onboard */
unsigned int val; /* hw value */
unsigned long freq; /* frequency */

52
sound/i2c/other/tea575x-tuner.c
View File

@ -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;