mirror of
https://github.com/torvalds/linux.git
synced 2024-12-27 13:22:23 +00:00
267ea2a9dc
tda7432 is no longer used with the old-style i2c API, so I can remove the support for that. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
495 lines
13 KiB
C
495 lines
13 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>
|
|
* Copyright (c) 2006 Mauro Carvalho Chehab <mchehab@infradead.org>
|
|
* 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/string.h>
|
|
#include <linux/timer.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/videodev2.h>
|
|
#include <linux/i2c.h>
|
|
|
|
#include <media/v4l2-device.h>
|
|
#include <media/v4l2-ioctl.h>
|
|
#include <media/i2c-addr.h>
|
|
#include <media/v4l2-i2c-drv.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);
|
|
|
|
|
|
|
|
/* Structure of address and subaddresses for the tda7432 */
|
|
|
|
struct tda7432 {
|
|
struct v4l2_subdev sd;
|
|
int addr;
|
|
int input;
|
|
int volume;
|
|
int muted;
|
|
int bass, treble;
|
|
int lf, lr, rf, rr;
|
|
int loud;
|
|
};
|
|
|
|
static inline struct tda7432 *to_state(struct v4l2_subdev *sd)
|
|
{
|
|
return container_of(sd, struct tda7432, sd);
|
|
}
|
|
|
|
/* 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 v4l2_subdev *sd, int subaddr, int val)
|
|
{
|
|
struct i2c_client *client = v4l2_get_subdevdata(sd);
|
|
unsigned char buffer[2];
|
|
|
|
v4l2_dbg(2, debug, sd, "In tda7432_write\n");
|
|
v4l2_dbg(1, debug, sd, "Writing %d 0x%x\n", subaddr, val);
|
|
buffer[0] = subaddr;
|
|
buffer[1] = val;
|
|
if (2 != i2c_master_send(client, buffer, 2)) {
|
|
v4l2_err(sd, "I/O error, trying (write %d 0x%x)\n",
|
|
subaddr, val);
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int tda7432_set(struct v4l2_subdev *sd)
|
|
{
|
|
struct i2c_client *client = v4l2_get_subdevdata(sd);
|
|
struct tda7432 *t = to_state(sd);
|
|
unsigned char buf[16];
|
|
|
|
v4l2_dbg(1, debug, sd,
|
|
"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)) {
|
|
v4l2_err(sd, "I/O error, trying tda7432_set\n");
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void do_tda7432_init(struct v4l2_subdev *sd)
|
|
{
|
|
struct tda7432 *t = to_state(sd);
|
|
|
|
v4l2_dbg(2, debug, sd, "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 = 1;
|
|
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(sd);
|
|
}
|
|
|
|
static int tda7432_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
|
|
{
|
|
struct tda7432 *t = to_state(sd);
|
|
|
|
switch (ctrl->id) {
|
|
case V4L2_CID_AUDIO_MUTE:
|
|
ctrl->value=t->muted;
|
|
return 0;
|
|
case V4L2_CID_AUDIO_VOLUME:
|
|
if (!maxvol){ /* max +20db */
|
|
ctrl->value = ( 0x6f - (t->volume & 0x7F) ) * 630;
|
|
} else { /* max 0db */
|
|
ctrl->value = ( 0x6f - (t->volume & 0x7F) ) * 829;
|
|
}
|
|
return 0;
|
|
case V4L2_CID_AUDIO_BALANCE:
|
|
{
|
|
if ( (t->lf) < (t->rf) )
|
|
/* right is attenuated, balance shifted left */
|
|
ctrl->value = (32768 - 1057*(t->rf));
|
|
else
|
|
/* left is attenuated, balance shifted right */
|
|
ctrl->value = (32768 + 1057*(t->lf));
|
|
return 0;
|
|
}
|
|
case V4L2_CID_AUDIO_BASS:
|
|
{
|
|
/* Bass/treble 4 bits each */
|
|
int bass=t->bass;
|
|
if(bass >= 0x8)
|
|
bass = ~(bass - 0x8) & 0xf;
|
|
ctrl->value = (bass << 12)+(bass << 8)+(bass << 4)+(bass);
|
|
return 0;
|
|
}
|
|
case V4L2_CID_AUDIO_TREBLE:
|
|
{
|
|
int treble=t->treble;
|
|
if(treble >= 0x8)
|
|
treble = ~(treble - 0x8) & 0xf;
|
|
ctrl->value = (treble << 12)+(treble << 8)+(treble << 4)+(treble);
|
|
return 0;
|
|
}
|
|
}
|
|
return -EINVAL;
|
|
}
|
|
|
|
static int tda7432_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
|
|
{
|
|
struct tda7432 *t = to_state(sd);
|
|
|
|
switch (ctrl->id) {
|
|
case V4L2_CID_AUDIO_MUTE:
|
|
t->muted=ctrl->value;
|
|
break;
|
|
case V4L2_CID_AUDIO_VOLUME:
|
|
if(!maxvol){ /* max +20db */
|
|
t->volume = 0x6f - ((ctrl->value)/630);
|
|
} else { /* max 0db */
|
|
t->volume = 0x6f - ((ctrl->value)/829);
|
|
}
|
|
if (loudness) /* Turn on the loudness bit */
|
|
t->volume |= TDA7432_LD_ON;
|
|
|
|
tda7432_write(sd, TDA7432_VL, t->volume);
|
|
return 0;
|
|
case V4L2_CID_AUDIO_BALANCE:
|
|
if (ctrl->value < 32768) {
|
|
/* shifted to left, attenuate right */
|
|
t->rr = (32768 - ctrl->value)/1057;
|
|
t->rf = t->rr;
|
|
t->lr = TDA7432_ATTEN_0DB;
|
|
t->lf = TDA7432_ATTEN_0DB;
|
|
} else if(ctrl->value > 32769) {
|
|
/* shifted to right, attenuate left */
|
|
t->lf = (ctrl->value - 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;
|
|
}
|
|
break;
|
|
case V4L2_CID_AUDIO_BASS:
|
|
t->bass = ctrl->value >> 12;
|
|
if(t->bass>= 0x8)
|
|
t->bass = (~t->bass & 0xf) + 0x8 ;
|
|
|
|
tda7432_write(sd, TDA7432_TN, 0x10 | (t->bass << 4) | t->treble);
|
|
return 0;
|
|
case V4L2_CID_AUDIO_TREBLE:
|
|
t->treble= ctrl->value >> 12;
|
|
if(t->treble>= 0x8)
|
|
t->treble = (~t->treble & 0xf) + 0x8 ;
|
|
|
|
tda7432_write(sd, TDA7432_TN, 0x10 | (t->bass << 4) | t->treble);
|
|
return 0;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* Used for both mute and balance changes */
|
|
if (t->muted)
|
|
{
|
|
/* Mute & update balance*/
|
|
tda7432_write(sd, TDA7432_LF, t->lf | TDA7432_MUTE);
|
|
tda7432_write(sd, TDA7432_LR, t->lr | TDA7432_MUTE);
|
|
tda7432_write(sd, TDA7432_RF, t->rf | TDA7432_MUTE);
|
|
tda7432_write(sd, TDA7432_RR, t->rr | TDA7432_MUTE);
|
|
} else {
|
|
tda7432_write(sd, TDA7432_LF, t->lf);
|
|
tda7432_write(sd, TDA7432_LR, t->lr);
|
|
tda7432_write(sd, TDA7432_RF, t->rf);
|
|
tda7432_write(sd, TDA7432_RR, t->rr);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int tda7432_queryctrl(struct v4l2_subdev *sd, struct v4l2_queryctrl *qc)
|
|
{
|
|
switch (qc->id) {
|
|
case V4L2_CID_AUDIO_VOLUME:
|
|
return v4l2_ctrl_query_fill(qc, 0, 65535, 65535 / 100, 58880);
|
|
case V4L2_CID_AUDIO_MUTE:
|
|
return v4l2_ctrl_query_fill(qc, 0, 1, 1, 0);
|
|
case V4L2_CID_AUDIO_BALANCE:
|
|
case V4L2_CID_AUDIO_BASS:
|
|
case V4L2_CID_AUDIO_TREBLE:
|
|
return v4l2_ctrl_query_fill(qc, 0, 65535, 65535 / 100, 32768);
|
|
}
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* ----------------------------------------------------------------------- */
|
|
|
|
static const struct v4l2_subdev_core_ops tda7432_core_ops = {
|
|
.queryctrl = tda7432_queryctrl,
|
|
.g_ctrl = tda7432_g_ctrl,
|
|
.s_ctrl = tda7432_s_ctrl,
|
|
};
|
|
|
|
static const struct v4l2_subdev_ops tda7432_ops = {
|
|
.core = &tda7432_core_ops,
|
|
};
|
|
|
|
/* ----------------------------------------------------------------------- */
|
|
|
|
/* *********************** *
|
|
* i2c interface functions *
|
|
* *********************** */
|
|
|
|
static int tda7432_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
struct tda7432 *t;
|
|
struct v4l2_subdev *sd;
|
|
|
|
v4l_info(client, "chip found @ 0x%02x (%s)\n",
|
|
client->addr << 1, client->adapter->name);
|
|
|
|
t = kzalloc(sizeof(*t), GFP_KERNEL);
|
|
if (!t)
|
|
return -ENOMEM;
|
|
sd = &t->sd;
|
|
v4l2_i2c_subdev_init(sd, client, &tda7432_ops);
|
|
if (loudness < 0 || loudness > 15) {
|
|
v4l2_warn(sd, "loudness parameter must be between 0 and 15\n");
|
|
if (loudness < 0)
|
|
loudness = 0;
|
|
if (loudness > 15)
|
|
loudness = 15;
|
|
}
|
|
|
|
do_tda7432_init(sd);
|
|
return 0;
|
|
}
|
|
|
|
static int tda7432_remove(struct i2c_client *client)
|
|
{
|
|
struct v4l2_subdev *sd = i2c_get_clientdata(client);
|
|
|
|
do_tda7432_init(sd);
|
|
v4l2_device_unregister_subdev(sd);
|
|
kfree(to_state(sd));
|
|
return 0;
|
|
}
|
|
|
|
static const struct i2c_device_id tda7432_id[] = {
|
|
{ "tda7432", 0 },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, tda7432_id);
|
|
|
|
static struct v4l2_i2c_driver_data v4l2_i2c_data = {
|
|
.name = "tda7432",
|
|
.probe = tda7432_probe,
|
|
.remove = tda7432_remove,
|
|
.id_table = tda7432_id,
|
|
};
|