/*
* For the STS-Thompson TDA7432 audio processor chip
- *
+ *
* Handles audio functions: volume, balance, tone, loudness
- * This driver will not complain if used with any
+ * This driver will not complain if used with any
* other i2c device with the same address.
*
* Muting and tone control by Jonathan Isom <jisom@ematic.com>
MODULE_DESCRIPTION("bttv driver for the tda7432 audio processor chip");
MODULE_LICENSE("GPL");
-MODULE_PARM(debug,"i");
-MODULE_PARM(loudness,"i");
+static int maxvol;
+static int loudness; /* disable loudness by default */
+static int debug; /* insmod parameter */
+module_param(debug, int, S_IRUGO | S_IWUSR);
+module_param(loudness, int, S_IRUGO);
MODULE_PARM_DESC(maxvol,"Set maximium volume to +20db (0), default is 0db(1)");
-MODULE_PARM(maxvol,"i");
-static int maxvol = 0;
-static int loudness = 0; /* disable loudness by default */
-static int debug = 0; /* insmod parameter */
+module_param(maxvol, int, S_IRUGO | S_IWUSR);
/* Address to scan (I2C address of this chip) */
* output (for front and rear). Since most vidcap cards probably
* don't have 4 channel output, this driver will set front & rear
* together (no independent control).
- */
+ */
/* Subaddresses for TDA7432 */
* 0x03 - Mute (Using Attenuators Plays better with modules)
* Mono probably isn't used - I'm guessing only the stereo
* input is connected on most cards, so we'll set it to stereo.
- *
+ *
* Bit 3 controls bass cut: 0/1 is non-symmetric/symmetric bass cut
* Bit 4 controls bass range: 0/1 is extended/standard bass range
- *
+ *
* Highest 3 bits not used
*/
-
+
#define TDA7432_STEREO_IN 0
#define TDA7432_MONO_IN 2 /* Probably won't be used */
#define TDA7432_BASS_SYM 1 << 3
#define TDA7432_LD_ON 1 << 7
-/* Subaddress 0x02 - Tone control */
+/* Subaddress 0x02 - Tone control */
/* Bits 0,1,2 control absolute treble gain from 0dB to 14dB
* 0x0 is 14dB, 0x7 is 0dB
* Bits 4,5,6 control absolute bass gain from 0dB to 14dB
* (This is only true for normal base range, set in 0x00)
* 0x0 << 4 is 14dB, 0x7 is 0dB
- *
+ *
* Bit 7 controls bass attenuation/gain (sign)
* 1 << 7 = gain (+)
- * 0 << 7 = attenuation (-)
+ * 0 << 7 = attenuation (-)
*
* Example:
* 1 1 0 1 0 1 0 1 is +4dB bass, -4dB treble
*/
-#define TDA7432_TREBLE_0DB 0xf
+#define TDA7432_TREBLE_0DB 0xf
#define TDA7432_TREBLE 7
#define TDA7432_TREBLE_GAIN 1 << 3
#define TDA7432_BASS_0DB 0xf
#define TDA7432_BASS 7 << 4
#define TDA7432_BASS_GAIN 1 << 7
-
+
/* Subaddress 0x03 - Left Front attenuation */
/* Subaddress 0x04 - Left Rear attenuation */
/* Subaddress 0x05 - Right Front attenuation */
* 0x1f is -37.5dB
*
* Bit 5 mutes that channel when set (1 = mute, 0 = unmute)
- * We'll use the mute on the input, though (above)
+ * We'll use the mute on the input, though (above)
* Bits 6,7 unused
*/
*
* Bits 5,6,7 unused
*/
-
-
+
+
/* Begin code */
printk(KERN_WARNING "tda7432: I/O error, trying (read)\n");
return -1;
}
- dprintk("tda7432: Read 0x%02x\n", buffer);
+ dprintk("tda7432: Read 0x%02x\n", buffer);
return buffer;
}
#endif
struct tda7432 *t = i2c_get_clientdata(client);
unsigned char buf[16];
d2printk("tda7432: In tda7432_set\n");
-
- dprintk(KERN_INFO
+
+ dprintk(KERN_INFO
"tda7432: 7432_set(0x%02x,0x%02x,0x%02x,0x%02x,0x%02x,0x%02x,0x%02x,0x%02x,0x%02x)\n",
t->input,t->volume,t->bass,t->treble,t->lf,t->lr,t->rf,t->rr,t->loud);
buf[0] = TDA7432_IN;
t->input = TDA7432_STEREO_IN | /* Main (stereo) input */
TDA7432_BASS_SYM | /* Symmetric bass cut */
- TDA7432_BASS_NORM; /* Normal bass range */
+ TDA7432_BASS_NORM; /* Normal bass range */
t->volume = 0x3b ; /* -27dB Volume */
if (loudness) /* Turn loudness on? */
- t->volume |= TDA7432_LD_ON;
+ t->volume |= TDA7432_LD_ON;
t->muted = VIDEO_AUDIO_MUTE;
t->treble = TDA7432_TREBLE_0DB; /* 0dB Treble */
t->bass = TDA7432_BASS_0DB; /* 0dB Bass */
client->adapter = adap;
client->addr = addr;
i2c_set_clientdata(client, t);
-
+
do_tda7432_init(client);
printk(KERN_INFO "tda7432: init\n");
do_tda7432_init(client);
i2c_detach_client(client);
-
+
kfree(t);
return 0;
}
/* --- v4l ioctls --- */
/* take care: bttv does userspace copying, we'll get a
kernel pointer here... */
-
+
/* Query card - scale from TDA7432 settings to V4L settings */
case VIDIOCGAUDIO:
{
va->mode |= VIDEO_SOUND_STEREO;
/* Master volume control
* V4L volume is min 0, max 65535
- * TDA7432 Volume:
+ * TDA7432 Volume:
* Min (-79dB) is 0x6f
* Max (+20dB) is 0x07 (630)
* Max (0dB) is 0x20 (829)
} else { /* max 0db */
va->volume = ( 0x6f - (t->volume & 0x7F) ) * 829;
}
-
+
/* Balance depends on L,R attenuation
* V4L balance is 0 to 65535, middle is 32768
* TDA7432 attenuation: min (0dB) is 0, max (-37.5dB) is 0x1f
* attenuation exists for lf, lr, rf, rr
* we use only lf and rf (front channels)
*/
-
+
if ( (t->lf) < (t->rf) )
/* right is attenuated, balance shifted left */
va->balance = (32768 - 1057*(t->rf));
else
/* left is attenuated, balance shifted right */
va->balance = (32768 + 1057*(t->lf));
-
- /* Bass/treble 4 bits each */
+
+ /* Bass/treble 4 bits each */
va->bass=t->bass;
if(va->bass >= 0x8)
va->bass = ~(va->bass - 0x8) & 0xf;
if(va->treble >= 0x8)
va->treble = ~(va->treble - 0x8) & 0xf;
va->treble = (va->treble << 12)+(va->treble << 8)+(va->treble << 4)+(va->treble);
-
+
break; /* VIDIOCGAUDIO case */
}
} else { /* max 0db */
t->volume = 0x6f - ((va->volume)/829);
}
-
+
if (loudness) /* Turn on the loudness bit */
t->volume |= TDA7432_LD_ON;
-
+
tda7432_write(client,TDA7432_VL, t->volume);
}
-
+
if(va->flags & VIDEO_AUDIO_BASS)
{
t->bass = va->bass >> 12;
}
if(va->flags & (VIDEO_AUDIO_TREBLE| VIDEO_AUDIO_BASS))
tda7432_write(client,TDA7432_TN, 0x10 | (t->bass << 4) | t->treble );
-
+
if(va->flags & VIDEO_AUDIO_BALANCE) {
- if (va->balance < 32768)
+ if (va->balance < 32768)
{
/* shifted to left, attenuate right */
t->rr = (32768 - va->balance)/1057;
t->rf = t->rr;
t->lr = TDA7432_ATTEN_0DB;
- t->lf = TDA7432_ATTEN_0DB;
+ t->lf = TDA7432_ATTEN_0DB;
}
else if(va->balance > 32769)
{
t->lf = (va->balance - 32768)/1057;
t->lr = t->lf;
t->rr = TDA7432_ATTEN_0DB;
- t->rf = TDA7432_ATTEN_0DB;
+ t->rf = TDA7432_ATTEN_0DB;
}
- else
+ else
{
- /* centered */
+ /* centered */
t->rr = TDA7432_ATTEN_0DB;
t->rf = TDA7432_ATTEN_0DB;
t->lf = TDA7432_ATTEN_0DB;
t->lr = TDA7432_ATTEN_0DB;
}
}
-
- t->muted=(va->flags & VIDEO_AUDIO_MUTE);
+
+ t->muted=(va->flags & VIDEO_AUDIO_MUTE);
if (t->muted)
{
- /* Mute & update balance*/
+ /* Mute & update balance*/
tda7432_write(client,TDA7432_LF, t->lf | TDA7432_MUTE);
tda7432_write(client,TDA7432_LR, t->lr | TDA7432_MUTE);
tda7432_write(client,TDA7432_RF, t->rf | TDA7432_MUTE);
tda7432_write(client,TDA7432_RF, t->rf);
tda7432_write(client,TDA7432_RR, t->rr);
}
-
+
break;
} /* end of VIDEOCSAUDIO case */
{
I2C_DEVNAME("tda7432"),
.id = -1,
- .driver = &driver,
+ .driver = &driver,
};
static int __init tda7432_init(void)
git://git.onelab.eu / linux-2.6.git / blobdiff