557 lines
15 KiB
C
557 lines
15 KiB
C
/*
|
|
* For the STS-Thompson TDA7432 audio processor chip
|
|
*
|
|
* Handles audio functions: volume, balance, tone, loudness
|
|
* 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>
|
|
*
|
|
* Copyright (c) 2000 Eric Sandeen <eric_sandeen@bigfoot.com>
|
|
* This code is placed under the terms of the GNU General Public License
|
|
* Based on tda9855.c by Steve VanDeBogart (vandebo@uclink.berkeley.edu)
|
|
* Which was based on tda8425.c by Greg Alexander (c) 1998
|
|
*
|
|
* OPTIONS:
|
|
* debug - set to 1 if you'd like to see debug messages
|
|
* set to 2 if you'd like to be inundated with debug messages
|
|
*
|
|
* loudness - set between 0 and 15 for varying degrees of loudness effect
|
|
*
|
|
* maxvol - set maximium volume to +20db (1), default is 0db(0)
|
|
*
|
|
*
|
|
* Revision: 0.7 - maxvol module parm to set maximium volume 0db or +20db
|
|
* store if muted so we can return it
|
|
* change balance only if flaged to
|
|
* Revision: 0.6 - added tone controls
|
|
* Revision: 0.5 - Fixed odd balance problem
|
|
* Revision: 0.4 - added muting
|
|
* Revision: 0.3 - Fixed silly reversed volume controls. :)
|
|
* Revision: 0.2 - Cleaned up #defines
|
|
* fixed volume control
|
|
* Added I2C_DRIVERID_TDA7432
|
|
* added loudness insmod control
|
|
* Revision: 0.1 - initial version
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/init.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/string.h>
|
|
#include <linux/timer.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/videodev.h>
|
|
#include <linux/i2c.h>
|
|
#include <linux/i2c-algo-bit.h>
|
|
|
|
#include "bttv.h"
|
|
#include <media/audiochip.h>
|
|
#include <media/id.h>
|
|
|
|
#ifndef VIDEO_AUDIO_BALANCE
|
|
# define VIDEO_AUDIO_BALANCE 32
|
|
#endif
|
|
|
|
MODULE_AUTHOR("Eric Sandeen <eric_sandeen@bigfoot.com>");
|
|
MODULE_DESCRIPTION("bttv driver for the tda7432 audio processor chip");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
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_param(maxvol, int, S_IRUGO | S_IWUSR);
|
|
|
|
|
|
/* Address to scan (I2C address of this chip) */
|
|
static unsigned short normal_i2c[] = {
|
|
I2C_TDA7432 >> 1,
|
|
I2C_CLIENT_END,
|
|
};
|
|
static unsigned short normal_i2c_range[] = { I2C_CLIENT_END, I2C_CLIENT_END };
|
|
I2C_CLIENT_INSMOD;
|
|
|
|
/* Structure of address and subaddresses for the tda7432 */
|
|
|
|
struct tda7432 {
|
|
int addr;
|
|
int input;
|
|
int volume;
|
|
int muted;
|
|
int bass, treble;
|
|
int lf, lr, rf, rr;
|
|
int loud;
|
|
struct i2c_client c;
|
|
};
|
|
static struct i2c_driver driver;
|
|
static struct i2c_client client_template;
|
|
|
|
#define dprintk if (debug) printk
|
|
#define d2printk if (debug > 1) printk
|
|
|
|
/* The TDA7432 is made by STS-Thompson
|
|
* http://www.st.com
|
|
* http://us.st.com/stonline/books/pdf/docs/4056.pdf
|
|
*
|
|
* TDA7432: I2C-bus controlled basic audio processor
|
|
*
|
|
* The TDA7432 controls basic audio functions like volume, balance,
|
|
* and tone control (including loudness). It also has four channel
|
|
* 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 */
|
|
|
|
#define TDA7432_IN 0x00 /* Input select */
|
|
#define TDA7432_VL 0x01 /* Volume */
|
|
#define TDA7432_TN 0x02 /* Bass, Treble (Tone) */
|
|
#define TDA7432_LF 0x03 /* Attenuation LF (Left Front) */
|
|
#define TDA7432_LR 0x04 /* Attenuation LR (Left Rear) */
|
|
#define TDA7432_RF 0x05 /* Attenuation RF (Right Front) */
|
|
#define TDA7432_RR 0x06 /* Attenuation RR (Right Rear) */
|
|
#define TDA7432_LD 0x07 /* Loudness */
|
|
|
|
|
|
/* Masks for bits in TDA7432 subaddresses */
|
|
|
|
/* Many of these not used - just for documentation */
|
|
|
|
/* Subaddress 0x00 - Input selection and bass control */
|
|
|
|
/* Bits 0,1,2 control input:
|
|
* 0x00 - Stereo input
|
|
* 0x02 - Mono input
|
|
* 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_BASS_NORM 1 << 4
|
|
|
|
/* Subaddress 0x01 - Volume */
|
|
|
|
/* Lower 7 bits control volume from -79dB to +32dB in 1dB steps
|
|
* Recommended maximum is +20 dB
|
|
*
|
|
* +32dB: 0x00
|
|
* +20dB: 0x0c
|
|
* 0dB: 0x20
|
|
* -79dB: 0x6f
|
|
*
|
|
* MSB (bit 7) controls loudness: 1/0 is loudness on/off
|
|
*/
|
|
|
|
#define TDA7432_VOL_0DB 0x20
|
|
#define TDA7432_LD_ON 1 << 7
|
|
|
|
|
|
/* Subaddress 0x02 - Tone control */
|
|
|
|
/* Bits 0,1,2 control absolute treble gain from 0dB to 14dB
|
|
* 0x0 is 14dB, 0x7 is 0dB
|
|
*
|
|
* Bit 3 controls treble attenuation/gain (sign)
|
|
* 1 = gain (+)
|
|
* 0 = attenuation (-)
|
|
*
|
|
* 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 (-)
|
|
*
|
|
* Example:
|
|
* 1 1 0 1 0 1 0 1 is +4dB bass, -4dB treble
|
|
*/
|
|
|
|
#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 */
|
|
/* Subaddress 0x06 - Right Rear attenuation */
|
|
|
|
/* Bits 0,1,2,3,4 control attenuation from 0dB to -37.5dB
|
|
* in 1.5dB steps.
|
|
*
|
|
* 0x00 is 0dB
|
|
* 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)
|
|
* Bits 6,7 unused
|
|
*/
|
|
|
|
#define TDA7432_ATTEN_0DB 0x00
|
|
#define TDA7432_MUTE 0x1 << 5
|
|
|
|
|
|
/* Subaddress 0x07 - Loudness Control */
|
|
|
|
/* Bits 0,1,2,3 control loudness from 0dB to -15dB in 1dB steps
|
|
* when bit 4 is NOT set
|
|
*
|
|
* 0x0 is 0dB
|
|
* 0xf is -15dB
|
|
*
|
|
* If bit 4 is set, then there is a flat attenuation according to
|
|
* the lower 4 bits, as above.
|
|
*
|
|
* Bits 5,6,7 unused
|
|
*/
|
|
|
|
|
|
|
|
/* Begin code */
|
|
|
|
static int tda7432_write(struct i2c_client *client, int subaddr, int val)
|
|
{
|
|
unsigned char buffer[2];
|
|
d2printk("tda7432: In tda7432_write\n");
|
|
dprintk("tda7432: Writing %d 0x%x\n", subaddr, val);
|
|
buffer[0] = subaddr;
|
|
buffer[1] = val;
|
|
if (2 != i2c_master_send(client,buffer,2)) {
|
|
printk(KERN_WARNING "tda7432: I/O error, trying (write %d 0x%x)\n",
|
|
subaddr, val);
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* I don't think we ever actually _read_ the chip... */
|
|
#if 0
|
|
static int tda7432_read(struct i2c_client *client)
|
|
{
|
|
unsigned char buffer;
|
|
d2printk("tda7432: In tda7432_read\n");
|
|
if (1 != i2c_master_recv(client,&buffer,1)) {
|
|
printk(KERN_WARNING "tda7432: I/O error, trying (read)\n");
|
|
return -1;
|
|
}
|
|
dprintk("tda7432: Read 0x%02x\n", buffer);
|
|
return buffer;
|
|
}
|
|
#endif
|
|
|
|
static int tda7432_set(struct i2c_client *client)
|
|
{
|
|
struct tda7432 *t = i2c_get_clientdata(client);
|
|
unsigned char buf[16];
|
|
d2printk("tda7432: In tda7432_set\n");
|
|
|
|
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;
|
|
buf[1] = t->input;
|
|
buf[2] = t->volume;
|
|
buf[3] = t->bass;
|
|
buf[4] = t->treble;
|
|
buf[5] = t->lf;
|
|
buf[6] = t->lr;
|
|
buf[7] = t->rf;
|
|
buf[8] = t->rr;
|
|
buf[9] = t->loud;
|
|
if (10 != i2c_master_send(client,buf,10)) {
|
|
printk(KERN_WARNING "tda7432: I/O error, trying tda7432_set\n");
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void do_tda7432_init(struct i2c_client *client)
|
|
{
|
|
struct tda7432 *t = i2c_get_clientdata(client);
|
|
d2printk("tda7432: In tda7432_init\n");
|
|
|
|
t->input = TDA7432_STEREO_IN | /* Main (stereo) input */
|
|
TDA7432_BASS_SYM | /* Symmetric bass cut */
|
|
TDA7432_BASS_NORM; /* Normal bass range */
|
|
t->volume = 0x3b ; /* -27dB Volume */
|
|
if (loudness) /* Turn loudness 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 */
|
|
t->lf = TDA7432_ATTEN_0DB; /* 0dB attenuation */
|
|
t->lr = TDA7432_ATTEN_0DB; /* 0dB attenuation */
|
|
t->rf = TDA7432_ATTEN_0DB; /* 0dB attenuation */
|
|
t->rr = TDA7432_ATTEN_0DB; /* 0dB attenuation */
|
|
t->loud = loudness; /* insmod parameter */
|
|
|
|
tda7432_set(client);
|
|
}
|
|
|
|
/* *********************** *
|
|
* i2c interface functions *
|
|
* *********************** */
|
|
|
|
static int tda7432_attach(struct i2c_adapter *adap, int addr, int kind)
|
|
{
|
|
struct tda7432 *t;
|
|
struct i2c_client *client;
|
|
d2printk("tda7432: In tda7432_attach\n");
|
|
|
|
t = kmalloc(sizeof *t,GFP_KERNEL);
|
|
if (!t)
|
|
return -ENOMEM;
|
|
memset(t,0,sizeof *t);
|
|
|
|
client = &t->c;
|
|
memcpy(client,&client_template,sizeof(struct i2c_client));
|
|
client->adapter = adap;
|
|
client->addr = addr;
|
|
i2c_set_clientdata(client, t);
|
|
|
|
do_tda7432_init(client);
|
|
printk(KERN_INFO "tda7432: init\n");
|
|
|
|
i2c_attach_client(client);
|
|
return 0;
|
|
}
|
|
|
|
static int tda7432_probe(struct i2c_adapter *adap)
|
|
{
|
|
#ifdef I2C_CLASS_TV_ANALOG
|
|
if (adap->class & I2C_CLASS_TV_ANALOG)
|
|
return i2c_probe(adap, &addr_data, tda7432_attach);
|
|
#else
|
|
if (adap->id == (I2C_ALGO_BIT | I2C_HW_B_BT848))
|
|
return i2c_probe(adap, &addr_data, tda7432_attach);
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
static int tda7432_detach(struct i2c_client *client)
|
|
{
|
|
struct tda7432 *t = i2c_get_clientdata(client);
|
|
|
|
do_tda7432_init(client);
|
|
i2c_detach_client(client);
|
|
|
|
kfree(t);
|
|
return 0;
|
|
}
|
|
|
|
static int tda7432_command(struct i2c_client *client,
|
|
unsigned int cmd, void *arg)
|
|
{
|
|
struct tda7432 *t = i2c_get_clientdata(client);
|
|
d2printk("tda7432: In tda7432_command\n");
|
|
|
|
switch (cmd) {
|
|
/* --- 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:
|
|
{
|
|
struct video_audio *va = arg;
|
|
dprintk("tda7432: VIDIOCGAUDIO\n");
|
|
|
|
va->flags |= VIDEO_AUDIO_VOLUME |
|
|
VIDEO_AUDIO_BASS |
|
|
VIDEO_AUDIO_TREBLE |
|
|
VIDEO_AUDIO_MUTABLE;
|
|
if (t->muted)
|
|
va->flags |= VIDEO_AUDIO_MUTE;
|
|
va->mode |= VIDEO_SOUND_STEREO;
|
|
/* Master volume control
|
|
* V4L volume is min 0, max 65535
|
|
* TDA7432 Volume:
|
|
* Min (-79dB) is 0x6f
|
|
* Max (+20dB) is 0x07 (630)
|
|
* Max (0dB) is 0x20 (829)
|
|
* (Mask out bit 7 of vol - it's for the loudness setting)
|
|
*/
|
|
if (!maxvol){ /* max +20db */
|
|
va->volume = ( 0x6f - (t->volume & 0x7F) ) * 630;
|
|
} 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
|
|
* to scale up to V4L numbers, mult by 1057
|
|
* 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 */
|
|
va->bass=t->bass;
|
|
if(va->bass >= 0x8)
|
|
va->bass = ~(va->bass - 0x8) & 0xf;
|
|
va->bass = (va->bass << 12)+(va->bass << 8)+(va->bass << 4)+(va->bass);
|
|
va->treble=t->treble;
|
|
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 */
|
|
}
|
|
|
|
/* Set card - scale from V4L settings to TDA7432 settings */
|
|
case VIDIOCSAUDIO:
|
|
{
|
|
struct video_audio *va = arg;
|
|
dprintk("tda7432: VIDEOCSAUDIO\n");
|
|
|
|
if(va->flags & VIDEO_AUDIO_VOLUME){
|
|
if(!maxvol){ /* max +20db */
|
|
t->volume = 0x6f - ((va->volume)/630);
|
|
} 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(t->bass>= 0x8)
|
|
t->bass = (~t->bass & 0xf) + 0x8 ;
|
|
}
|
|
if(va->flags & VIDEO_AUDIO_TREBLE)
|
|
{
|
|
t->treble= va->treble >> 12;
|
|
if(t->treble>= 0x8)
|
|
t->treble = (~t->treble & 0xf) + 0x8 ;
|
|
}
|
|
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)
|
|
{
|
|
/* 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;
|
|
}
|
|
else if(va->balance > 32769)
|
|
{
|
|
/* shifted to right, attenuate left */
|
|
t->lf = (va->balance - 32768)/1057;
|
|
t->lr = t->lf;
|
|
t->rr = TDA7432_ATTEN_0DB;
|
|
t->rf = TDA7432_ATTEN_0DB;
|
|
}
|
|
else
|
|
{
|
|
/* 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);
|
|
if (t->muted)
|
|
{
|
|
/* 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_RR, t->rr | TDA7432_MUTE);
|
|
} else {
|
|
tda7432_write(client,TDA7432_LF, t->lf);
|
|
tda7432_write(client,TDA7432_LR, t->lr);
|
|
tda7432_write(client,TDA7432_RF, t->rf);
|
|
tda7432_write(client,TDA7432_RR, t->rr);
|
|
}
|
|
|
|
break;
|
|
|
|
} /* end of VIDEOCSAUDIO case */
|
|
|
|
default: /* Not VIDEOCGAUDIO or VIDEOCSAUDIO */
|
|
|
|
/* nothing */
|
|
d2printk("tda7432: Default\n");
|
|
|
|
} /* end of (cmd) switch */
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct i2c_driver driver = {
|
|
.owner = THIS_MODULE,
|
|
.name = "i2c tda7432 driver",
|
|
.id = I2C_DRIVERID_TDA7432,
|
|
.flags = I2C_DF_NOTIFY,
|
|
.attach_adapter = tda7432_probe,
|
|
.detach_client = tda7432_detach,
|
|
.command = tda7432_command,
|
|
};
|
|
|
|
static struct i2c_client client_template =
|
|
{
|
|
I2C_DEVNAME("tda7432"),
|
|
.driver = &driver,
|
|
};
|
|
|
|
static int __init tda7432_init(void)
|
|
{
|
|
if ( (loudness < 0) || (loudness > 15) ) {
|
|
printk(KERN_ERR "tda7432: loudness parameter must be between 0 and 15\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
return i2c_add_driver(&driver);
|
|
}
|
|
|
|
static void __exit tda7432_fini(void)
|
|
{
|
|
i2c_del_driver(&driver);
|
|
}
|
|
|
|
module_init(tda7432_init);
|
|
module_exit(tda7432_fini);
|
|
|
|
/*
|
|
* Local variables:
|
|
* c-basic-offset: 8
|
|
* End:
|
|
*/
|