summaryrefslogtreecommitdiff
path: root/sound/i2c/other/tea575x-tuner.c
diff options
context:
space:
mode:
Diffstat (limited to 'sound/i2c/other/tea575x-tuner.c')
-rw-r--r--sound/i2c/other/tea575x-tuner.c153
1 files changed, 112 insertions, 41 deletions
diff --git a/sound/i2c/other/tea575x-tuner.c b/sound/i2c/other/tea575x-tuner.c
index ee538f1ae846..4831800239d3 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
@@ -77,27 +77,95 @@ static struct v4l2_queryctrl radio_qctrl[] = {
* lowlevel part
*/
+static void snd_tea575x_write(struct snd_tea575x *tea, unsigned int val)
+{
+ u16 l;
+ u8 data;
+
+ tea->ops->set_direction(tea, 1);
+ udelay(16);
+
+ for (l = 25; l > 0; l--) {
+ data = (val >> 24) & TEA575X_DATA;
+ val <<= 1; /* shift data */
+ tea->ops->set_pins(tea, data | TEA575X_WREN);
+ udelay(2);
+ tea->ops->set_pins(tea, data | TEA575X_WREN | TEA575X_CLK);
+ udelay(2);
+ tea->ops->set_pins(tea, data | TEA575X_WREN);
+ udelay(2);
+ }
+
+ if (!tea->mute)
+ tea->ops->set_pins(tea, 0);
+}
+
+static unsigned int snd_tea575x_read(struct snd_tea575x *tea)
+{
+ u16 l, rdata;
+ u32 data = 0;
+
+ tea->ops->set_direction(tea, 0);
+ tea->ops->set_pins(tea, 0);
+ udelay(16);
+
+ for (l = 24; l--;) {
+ tea->ops->set_pins(tea, TEA575X_CLK);
+ udelay(2);
+ if (!l)
+ tea->tuned = tea->ops->get_pins(tea) & TEA575X_MOST ? 0 : 1;
+ tea->ops->set_pins(tea, 0);
+ udelay(2);
+ data <<= 1; /* shift data */
+ rdata = tea->ops->get_pins(tea);
+ if (!l)
+ tea->stereo = (rdata & TEA575X_MOST) ? 0 : 1;
+ if (rdata & TEA575X_DATA)
+ data++;
+ udelay(2);
+ }
+
+ if (tea->mute)
+ tea->ops->set_pins(tea, TEA575X_WREN);
+
+ return data;
+}
+
+static void snd_tea575x_get_freq(struct snd_tea575x *tea)
+{
+ unsigned long freq;
+
+ freq = snd_tea575x_read(tea) & TEA575X_BIT_FREQ_MASK;
+ /* freq *= 12.5 */
+ freq *= 125;
+ freq /= 10;
+ /* crystal fixup */
+ if (tea->tea5759)
+ freq += TEA575X_FMIF;
+ else
+ freq -= TEA575X_FMIF;
+
+ 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;
+ freq -= TEA575X_FMIF;
else
- freq += tea->freq_fixup;
+ freq += TEA575X_FMIF;
/* freq /= 12.5 */
freq *= 10;
freq /= 125;
tea->val &= ~TEA575X_BIT_FREQ_MASK;
tea->val |= freq & TEA575X_BIT_FREQ_MASK;
- tea->ops->write(tea, tea->val);
+ snd_tea575x_write(tea, tea->val);
}
/*
@@ -109,29 +177,34 @@ 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));
- sprintf(v->bus_info, "PCI");
+ strlcpy(v->card, tea->card, sizeof(v->card));
+ strlcat(v->card, tea->tea5759 ? " TEA5759" : " TEA5757", sizeof(v->card));
+ strlcpy(v->bus_info, tea->bus_info, sizeof(v->bus_info));
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;
+ snd_tea575x_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 +221,10 @@ 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 +234,9 @@ 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;
@@ -209,10 +288,8 @@ static int vidioc_g_ctrl(struct file *file, void *priv,
switch (ctrl->id) {
case V4L2_CID_AUDIO_MUTE:
- if (tea->ops->mute) {
- ctrl->value = tea->mute;
- return 0;
- }
+ ctrl->value = tea->mute;
+ return 0;
}
return -EINVAL;
}
@@ -224,11 +301,11 @@ static int vidioc_s_ctrl(struct file *file, void *priv,
switch (ctrl->id) {
case V4L2_CID_AUDIO_MUTE:
- if (tea->ops->mute) {
- tea->ops->mute(tea, ctrl->value);
+ if (tea->mute != ctrl->value) {
tea->mute = ctrl->value;
- return 0;
+ snd_tea575x_set_freq(tea);
}
+ return 0;
}
return -EINVAL;
}
@@ -293,18 +370,16 @@ static struct video_device tea575x_radio = {
/*
* initialize all the tea575x chips
*/
-void snd_tea575x_init(struct snd_tea575x *tea)
+int snd_tea575x_init(struct snd_tea575x *tea)
{
int retval;
- unsigned int val;
struct video_device *tea575x_radio_inst;
- val = tea->ops->read(tea);
- if (val == 0x1ffffff || val == 0) {
- snd_printk(KERN_ERR
- "tea575x-tuner: Cannot find TEA575x chip\n");
- return;
- }
+ tea->mute = 1;
+
+ snd_tea575x_write(tea, 0x55AA);
+ if (snd_tea575x_read(tea) != 0x55AA)
+ return -ENODEV;
tea->in_use = 0;
tea->val = TEA575X_BIT_BAND_FM | TEA575X_BIT_SEARCH_10_40;
@@ -313,7 +388,7 @@ void snd_tea575x_init(struct snd_tea575x *tea)
tea575x_radio_inst = video_device_alloc();
if (tea575x_radio_inst == NULL) {
printk(KERN_ERR "tea575x-tuner: not enough memory\n");
- return;
+ return -ENOMEM;
}
memcpy(tea575x_radio_inst, &tea575x_radio, sizeof(tea575x_radio));
@@ -328,17 +403,13 @@ void snd_tea575x_init(struct snd_tea575x *tea)
if (retval) {
printk(KERN_ERR "tea575x-tuner: can't register video device!\n");
kfree(tea575x_radio_inst);
- return;
+ return retval;
}
snd_tea575x_set_freq(tea);
-
- /* mute on init */
- if (tea->ops->mute) {
- tea->ops->mute(tea, 1);
- tea->mute = 1;
- }
tea->vd = tea575x_radio_inst;
+
+ return 0;
}
void snd_tea575x_exit(struct snd_tea575x *tea)
generated by cgit v1.2.3 (git 2.0.4) at 2024-05-23 13:07:54 +0000