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alistair23-linux/drivers/media/i2c/tda7432.c
Mauro Carvalho Chehab 1ac051631a media: get rid of i2c-addr.h 
In the past, the same I2C address were used on multiple places.
After I2C rebinding changes, this is no longer needed. So, we
can just get rid of this header, placing the I2C address where
they belong, e. g. either at bttv driver or at tvtuner.

Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
2017-12-18 11:52:24 -05:00

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/*
* 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)
*/
#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/v4l2-ctrls.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_PARM_DESC(debug, "Set debugging level from 0 to 3. Default is off(0).");
module_param(loudness, int, S_IRUGO);
MODULE_PARM_DESC(loudness, "Turn loudness on(1) else off(0). Default is off(0).");
module_param(maxvol, int, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(maxvol, "Set maximium volume to +20dB(0) else +0dB(1). Default is +20dB(0).");
/* Structure of address and subaddresses for the tda7432 */
struct tda7432 {
struct v4l2_subdev sd;
struct v4l2_ctrl_handler hdl;
struct {
/* bass/treble cluster */
struct v4l2_ctrl *bass;
struct v4l2_ctrl *treble;
};
struct {
/* mute/balance cluster */
struct v4l2_ctrl *mute;
struct v4l2_ctrl *balance;
};
};
static inline struct tda7432 *to_state(struct v4l2_subdev *sd)
{
return container_of(sd, struct tda7432, sd);
}
static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl)
{
return &container_of(ctrl->handler, struct tda7432, hdl)->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);
unsigned char buf[16];
buf[0] = TDA7432_IN;
buf[1] = TDA7432_STEREO_IN | /* Main (stereo) input */
TDA7432_BASS_SYM | /* Symmetric bass cut */
TDA7432_BASS_NORM; /* Normal bass range */
buf[2] = 0x3b;
if (loudness) /* Turn loudness on? */
buf[2] |= TDA7432_LD_ON;
buf[3] = TDA7432_TREBLE_0DB | (TDA7432_BASS_0DB << 4);
buf[4] = TDA7432_ATTEN_0DB;
buf[5] = TDA7432_ATTEN_0DB;
buf[6] = TDA7432_ATTEN_0DB;
buf[7] = TDA7432_ATTEN_0DB;
buf[8] = loudness;
if (9 != i2c_master_send(client, buf, 9)) {
v4l2_err(sd, "I/O error, trying tda7432_set\n");
return -1;
}
return 0;
}
static int tda7432_log_status(struct v4l2_subdev *sd)
{
struct tda7432 *state = to_state(sd);
v4l2_ctrl_handler_log_status(&state->hdl, sd->name);
return 0;
}
static int tda7432_s_ctrl(struct v4l2_ctrl *ctrl)
{
struct v4l2_subdev *sd = to_sd(ctrl);
struct tda7432 *t = to_state(sd);
u8 bass, treble, volume;
u8 lf, lr, rf, rr;
switch (ctrl->id) {
case V4L2_CID_AUDIO_MUTE:
if (t->balance->val < 0) {
/* shifted to left, attenuate right */
rr = rf = -t->balance->val;
lr = lf = TDA7432_ATTEN_0DB;
} else if (t->balance->val > 0) {
/* shifted to right, attenuate left */
rr = rf = TDA7432_ATTEN_0DB;
lr = lf = t->balance->val;
} else {
/* centered */
rr = rf = TDA7432_ATTEN_0DB;
lr = lf = TDA7432_ATTEN_0DB;
}
if (t->mute->val) {
lf |= TDA7432_MUTE;
lr |= TDA7432_MUTE;
rf |= TDA7432_MUTE;
rr |= TDA7432_MUTE;
}
/* Mute & update balance*/
tda7432_write(sd, TDA7432_LF, lf);
tda7432_write(sd, TDA7432_LR, lr);
tda7432_write(sd, TDA7432_RF, rf);
tda7432_write(sd, TDA7432_RR, rr);
return 0;
case V4L2_CID_AUDIO_VOLUME:
volume = 0x6f - ctrl->val;
if (loudness) /* Turn on the loudness bit */
volume |= TDA7432_LD_ON;
tda7432_write(sd, TDA7432_VL, volume);
return 0;
case V4L2_CID_AUDIO_BASS:
bass = t->bass->val;
treble = t->treble->val;
if (bass >= 0x8)
bass = 14 - (bass - 8);
if (treble >= 0x8)
treble = 14 - (treble - 8);
tda7432_write(sd, TDA7432_TN, 0x10 | (bass << 4) | treble);
return 0;
}
return -EINVAL;
}
/* ----------------------------------------------------------------------- */
static const struct v4l2_ctrl_ops tda7432_ctrl_ops = {
.s_ctrl = tda7432_s_ctrl,
};
static const struct v4l2_subdev_core_ops tda7432_core_ops = {
.log_status = tda7432_log_status,
};
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 = devm_kzalloc(&client->dev, sizeof(*t), GFP_KERNEL);
if (!t)
return -ENOMEM;
sd = &t->sd;
v4l2_i2c_subdev_init(sd, client, &tda7432_ops);
v4l2_ctrl_handler_init(&t->hdl, 5);
v4l2_ctrl_new_std(&t->hdl, &tda7432_ctrl_ops,
V4L2_CID_AUDIO_VOLUME, 0, maxvol ? 0x68 : 0x4f, 1, maxvol ? 0x5d : 0x47);
t->mute = v4l2_ctrl_new_std(&t->hdl, &tda7432_ctrl_ops,
V4L2_CID_AUDIO_MUTE, 0, 1, 1, 0);
t->balance = v4l2_ctrl_new_std(&t->hdl, &tda7432_ctrl_ops,
V4L2_CID_AUDIO_BALANCE, -31, 31, 1, 0);
t->bass = v4l2_ctrl_new_std(&t->hdl, &tda7432_ctrl_ops,
V4L2_CID_AUDIO_BASS, 0, 14, 1, 7);
t->treble = v4l2_ctrl_new_std(&t->hdl, &tda7432_ctrl_ops,
V4L2_CID_AUDIO_TREBLE, 0, 14, 1, 7);
sd->ctrl_handler = &t->hdl;
if (t->hdl.error) {
int err = t->hdl.error;
v4l2_ctrl_handler_free(&t->hdl);
return err;
}
v4l2_ctrl_cluster(2, &t->bass);
v4l2_ctrl_cluster(2, &t->mute);
v4l2_ctrl_handler_setup(&t->hdl);
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;
}
tda7432_set(sd);
return 0;
}
static int tda7432_remove(struct i2c_client *client)
{
struct v4l2_subdev *sd = i2c_get_clientdata(client);
struct tda7432 *t = to_state(sd);
tda7432_set(sd);
v4l2_device_unregister_subdev(sd);
v4l2_ctrl_handler_free(&t->hdl);
return 0;
}
static const struct i2c_device_id tda7432_id[] = {
{ "tda7432", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, tda7432_id);
static struct i2c_driver tda7432_driver = {
.driver = {
.name = "tda7432",
},
.probe = tda7432_probe,
.remove = tda7432_remove,
.id_table = tda7432_id,
};
module_i2c_driver(tda7432_driver);
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