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Hello Jeff,
Refer to this thread for example code: https://e2e.ti.com/support/audio-group/audio/f/audio-forum/722027/linux-tas5825m-linux-drivers
best regards,
Luis
Hello Jeff,
The example is very similar for TAS5805M and TAS5825P, but please note the guide on how to generate the header file as this will have all your device configuration that you generate in PPC3. This code is only for reference and any additional modifications needs to be handled by your firmware designers as we do not provide software support.
/*
* Driver for the TAS5825M Audio Amplifier
*
* Author: Andy Liu <andy-liu@ti.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*/
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/slab.h>
#include <linux/of.h>
#include <linux/init.h>
#include <linux/i2c.h>
#include <linux/regmap.h>
#include <sound/soc.h>
#include <sound/pcm.h>
#include <sound/initval.h>
#define TAS5825M_DRV_NAME "tas5825m"
#define TAS5825M_RATES (SNDRV_PCM_RATE_48000)
#define TAS5825M_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
#define TAS5825M_REG_00 (0x00)
#define TAS5825M_REG_03 (0x03)
#define TAS5825M_REG_0C (0x0c)
#define TAS5825M_REG_0D (0x0d)
#define TAS5825M_REG_0E (0x0e)
#define TAS5825M_REG_0F (0x0f)
#define TAS5825M_REG_10 (0x10)
#define TAS5825M_REG_11 (0x11)
#define TAS5825M_REG_12 (0x12)
#define TAS5825M_REG_13 (0x13)
#define TAS5825M_REG_35 (0x35)
#define TAS5825M_REG_7F (0x7f)
#define TAS5825M_PAGE_00 (0x00)
#define TAS5825M_PAGE_0B (0x0b)
#define TAS5825M_BOOK_00 (0x00)
#define TAS5825M_BOOK_8C (0x8c)
#define TAS5825M_VOLUME_MAX (158)
#define TAS5825M_VOLUME_MIN (0)
const uint32_t tas5825m_volume[] = {
0x0000001B, //0, -110dB
0x0000001E, //1, -109dB
0x00000021, //2, -108dB
0x00000025, //3, -107dB
0x0000002A, //4, -106dB
0x0000002F, //5, -105dB
0x00000035, //6, -104dB
0x0000003B, //7, -103dB
0x00000043, //8, -102dB
0x0000004B, //9, -101dB
0x00000054, //10, -100dB
0x0000005E, //11, -99dB
0x0000006A, //12, -98dB
0x00000076, //13, -97dB
0x00000085, //14, -96dB
0x00000095, //15, -95dB
0x000000A7, //16, -94dB
0x000000BC, //17, -93dB
0x000000D3, //18, -92dB
0x000000EC, //19, -91dB
0x00000109, //20, -90dB
0x0000012A, //21, -89dB
0x0000014E, //22, -88dB
0x00000177, //23, -87dB
0x000001A4, //24, -86dB
0x000001D8, //25, -85dB
0x00000211, //26, -84dB
0x00000252, //27, -83dB
0x0000029A, //28, -82dB
0x000002EC, //29, -81dB
0x00000347, //30, -80dB
0x000003AD, //31, -79dB
0x00000420, //32, -78dB
0x000004A1, //33, -77dB
0x00000532, //34, -76dB
0x000005D4, //35, -75dB
0x0000068A, //36, -74dB
0x00000756, //37, -73dB
0x0000083B, //38, -72dB
0x0000093C, //39, -71dB
0x00000A5D, //40, -70dB
0x00000BA0, //41, -69dB
0x00000D0C, //42, -68dB
0x00000EA3, //43, -67dB
0x0000106C, //44, -66dB
0x0000126D, //45, -65dB
0x000014AD, //46, -64dB
0x00001733, //47, -63dB
0x00001A07, //48, -62dB
0x00001D34, //49, -61dB
0x000020C5, //50, -60dB
0x000024C4, //51, -59dB
0x00002941, //52, -58dB
0x00002E49, //53, -57dB
0x000033EF, //54, -56dB
0x00003A45, //55, -55dB
0x00004161, //56, -54dB
0x0000495C, //57, -53dB
0x0000524F, //58, -52dB
0x00005C5A, //59, -51dB
0x0000679F, //60, -50dB
0x00007444, //61, -49dB
0x00008274, //62, -48dB
0x0000925F, //63, -47dB
0x0000A43B, //64, -46dB
0x0000B845, //65, -45dB
0x0000CEC1, //66, -44dB
0x0000E7FB, //67, -43dB
0x00010449, //68, -42dB
0x0001240C, //69, -41dB
0x000147AE, //70, -40dB
0x00016FAA, //71, -39dB
0x00019C86, //72, -38dB
0x0001CEDC, //73, -37dB
0x00020756, //74, -36dB
0x000246B5, //75, -35dB
0x00028DCF, //76, -34dB
0x0002DD96, //77, -33dB
0x00033718, //78, -32dB
0x00039B87, //79, -31dB
0x00040C37, //80, -30dB
0x00048AA7, //81, -29dB
0x00051884, //82, -28dB
0x0005B7B1, //83, -27dB
0x00066A4A, //84, -26dB
0x000732AE, //85, -25dB
0x00081385, //86, -24dB
0x00090FCC, //87, -23dB
0x000A2ADB, //88, -22dB
0x000B6873, //89, -21dB
0x000CCCCD, //90, -20dB
0x000E5CA1, //91, -19dB
0x00101D3F, //92, -18dB
0x0012149A, //93, -17dB
0x00144961, //94, -16dB
0x0016C311, //95, -15dB
0x00198A13, //96, -14dB
0x001CA7D7, //97, -13dB
0x002026F3, //98, -12dB
0x00241347, //99, -11dB
0x00287A27, //100, -10dB
0x002D6A86, //101, -9dB
0x0032F52D, //102, -8dB
0x00392CEE, //103, -7dB
0x004026E7, //104, -6dB
0x0047FACD, //105, -5dB
0x0050C336, //106, -4dB
0x005A9DF8, //107, -3dB
0x0065AC8C, //108, -2dB
0x00721483, //109, -1dB
0x00800000, //110, 0dB
0x008F9E4D, //111, 1dB
0x00A12478, //112, 2dB
0x00B4CE08, //113, 3dB
0x00CADDC8, //114, 4dB
0x00E39EA9, //115, 5dB
0x00FF64C1, //116, 6dB
0x011E8E6A, //117, 7dB
0x0141857F, //118, 8dB
0x0168C0C6, //119, 9dB
0x0194C584, //120, 10dB
0x01C62940, //121, 11dB
0x01FD93C2, //122, 12dB
0x023BC148, //123, 13dB
0x02818508, //124, 14dB
0x02CFCC01, //125, 15dB
0x0327A01A, //126, 16dB
0x038A2BAD, //127, 17dB
0x03F8BD7A, //128, 18dB
0x0474CD1B, //129, 19dB
0x05000000, //130, 20dB
0x059C2F02, //131, 21dB
0x064B6CAE, //132, 22dB
0x07100C4D, //133, 23dB
0x07ECA9CD, //134, 24dB
0x08E43299, //135, 25dB
0x09F9EF8E, //136, 26dB
0x0B319025, //137, 27dB
0x0C8F36F2, //138, 28dB
0x0E1787B8, //139, 29dB
0x0FCFB725, //140, 30dB
0x11BD9C84, //141, 31dB
0x13E7C594, //142, 32dB
0x16558CCB, //143, 33dB
0x190F3254, //144, 34dB
0x1C1DF80E, //145, 35dB
0x1F8C4107, //146, 36dB
0x2365B4BF, //147, 37dB
0x27B766C2, //148, 38dB
0x2C900313, //149, 39dB
0x32000000, //150, 40dB
0x3819D612, //151, 41dB
0x3EF23ECA, //152, 42dB
0x46A07B07, //153, 43dB
0x4F3EA203, //154, 44dB
0x58E9F9F9, //155, 45dB
0x63C35B8E, //156, 46dB
0x6FEFA16D, //157, 47dB
0x7D982575, //158, 48dB
};
struct tas5825m_priv {
struct regmap *regmap;
struct mutex lock;
int vol;
};
const struct regmap_config tas5825m_regmap = {
.reg_bits = 8,
.val_bits = 8,
.cache_type = REGCACHE_RBTREE,
};
static int tas5825m_vol_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
{
uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
uinfo->access = (SNDRV_CTL_ELEM_ACCESS_TLV_READ | SNDRV_CTL_ELEM_ACCESS_READWRITE);
uinfo->count = 1;
uinfo->value.integer.min = TAS5825M_VOLUME_MIN;
uinfo->value.integer.max = TAS5825M_VOLUME_MAX;
uinfo->value.integer.step = 1;
return 0;
}
static int tas5825m_vol_locked_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
struct tas5825m_priv *tas5825m = snd_soc_codec_get_drvdata(codec);
mutex_lock(&tas5825m->lock);
ucontrol->value.integer.value[0] = tas5825m->vol;
mutex_unlock(&tas5825m->lock);
return 0;
}
static inline int get_volume_index(int vol)
{
int index;
index = vol;
if (index < TAS5825M_VOLUME_MIN)
index = TAS5825M_VOLUME_MIN;
if (index > TAS5825M_VOLUME_MAX)
index = TAS5825M_VOLUME_MAX;
return index;
}
static void tas5825m_set_volume(struct snd_soc_codec *codec, int vol)
{
unsigned int index;
uint32_t volume_hex;
uint8_t byte4;
uint8_t byte3;
uint8_t byte2;
uint8_t byte1;
index = get_volume_index(vol);
volume_hex = tas5825m_volume[index];
byte4 = ((volume_hex >> 24) & 0xFF);
byte3 = ((volume_hex >> 16) & 0xFF);
byte2 = ((volume_hex >> 8) & 0xFF);
byte1 = ((volume_hex >> 0) & 0xFF);
//w 98 00 00
snd_soc_write(codec, TAS5825M_REG_00, TAS5825M_PAGE_00);
//w 98 7f 8c
snd_soc_write(codec, TAS5825M_REG_7F, TAS5825M_BOOK_8C);
//w 98 00 0b
snd_soc_write(codec, TAS5825M_REG_00, TAS5825M_PAGE_0B);
//w 98 0c xx xx xx xx
snd_soc_write(codec, TAS5825M_REG_0C, byte4);
snd_soc_write(codec, TAS5825M_REG_0D, byte3);
snd_soc_write(codec, TAS5825M_REG_0E, byte2);
snd_soc_write(codec, TAS5825M_REG_0F, byte1);
//w 98 10 xx xx xx xx
snd_soc_write(codec, TAS5825M_REG_10, byte4);
snd_soc_write(codec, TAS5825M_REG_11, byte3);
snd_soc_write(codec, TAS5825M_REG_12, byte2);
snd_soc_write(codec, TAS5825M_REG_13, byte1);
}
static int tas5825m_vol_locked_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
struct tas5825m_priv *tas5825m = snd_soc_codec_get_drvdata(codec);
mutex_lock(&tas5825m->lock);
tas5825m->vol = ucontrol->value.integer.value[0];
tas5825m_set_volume(codec, tas5825m->vol);
mutex_unlock(&tas5825m->lock);
return 0;
}
static const struct snd_kcontrol_new tas5825m_vol_control =
{
.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
.name = "Master Playback Volume",
.info = tas5825m_vol_info,
.get = tas5825m_vol_locked_get,
.put = tas5825m_vol_locked_put,
};
static int tas5825m_snd_probe(struct snd_soc_codec *codec)
{
int ret;
ret = snd_soc_add_codec_controls(codec, &tas5825m_vol_control, 1);
return ret;
}
static struct snd_soc_codec_driver soc_codec_tas5825m = {
.probe = tas5825m_snd_probe,
};
static int tas5825m_mute(struct snd_soc_dai *dai, int mute)
{
u8 reg03_value = 0;
u8 reg35_value = 0;
struct snd_soc_codec *codec = dai->codec;
if (mute)
{
//mute both left & right channels
reg03_value = 0x0b;
reg35_value = 0x00;
}
else
{
//umute
reg03_value = 0x03;
reg35_value = 0x11;
}
snd_soc_write(codec, TAS5825M_REG_00, TAS5825M_PAGE_00);
snd_soc_write(codec, TAS5825M_REG_7F, TAS5825M_BOOK_00);
snd_soc_write(codec, TAS5825M_REG_00, TAS5825M_PAGE_00);
snd_soc_write(codec, TAS5825M_REG_03, reg03_value);
snd_soc_write(codec, TAS5825M_REG_35, reg35_value);
return 0;
}
static const struct snd_soc_dai_ops tas5825m_dai_ops = {
.digital_mute = tas5825m_mute,
};
static struct snd_soc_dai_driver tas5825m_dai = {
.name = "tas5825m-amplifier",
.playback = {
.stream_name = "Playback",
.channels_min = 2,
.channels_max = 2,
.rates = TAS5825M_RATES,
.formats = TAS5825M_FORMATS,
},
.ops = &tas5825m_dai_ops,
};
#if 1
/*
#Get TAS5825M into play mode
w 98 00 00
w 98 7f 00
w 98 00 00
w 98 03 03
# Clear FAULT
w 98 78 80
*/
static const struct reg_sequence tas5825m_init_sequence[] = {
{ 0x00, 0x00 },
{ 0x7f, 0x00 },
{ 0x00, 0x00 },
{ 0x03, 0x03 },
{ 0x78, 0x80 },
};
#endif
static int tas5825m_probe(struct device *dev, struct regmap *regmap)
{
struct tas5825m_priv *tas5825m;
int ret;
tas5825m = devm_kzalloc(dev, sizeof(struct tas5825m_priv), GFP_KERNEL);
if (!tas5825m)
return -ENOMEM;
dev_set_drvdata(dev, tas5825m);
tas5825m->regmap = regmap;
tas5825m->vol = 100; //100, -10dB
mutex_init(&tas5825m->lock);
ret = regmap_register_patch(regmap, tas5825m_init_sequence, ARRAY_SIZE(tas5825m_init_sequence));
if (ret != 0)
{
dev_err(dev, "Failed to initialize TAS5825M: %d\n",ret);
goto err;
}
ret = snd_soc_register_codec(dev,
&soc_codec_tas5825m,
&tas5825m_dai,
1);
if (ret != 0)
{
dev_err(dev, "Failed to register CODEC: %d\n", ret);
goto err;
}
return 0;
err:
return ret;
}
static int tas5825m_i2c_probe(struct i2c_client *i2c, const struct i2c_device_id *id)
{
struct regmap *regmap;
struct regmap_config config = tas5825m_regmap;
regmap = devm_regmap_init_i2c(i2c, &config);
if (IS_ERR(regmap))
return PTR_ERR(regmap);
return tas5825m_probe(&i2c->dev, regmap);
}
static int tas5825m_remove(struct device *dev)
{
snd_soc_unregister_codec(dev);
return 0;
}
static int tas5825m_i2c_remove(struct i2c_client *i2c)
{
tas5825m_remove(&i2c->dev);
return 0;
}
static const struct i2c_device_id tas5825m_i2c_id[] = {
{ "tas5825m", },
{ }
};
MODULE_DEVICE_TABLE(i2c, tas5825m_i2c_id);
#ifdef CONFIG_OF
static const struct of_device_id tas5825m_of_match[] = {
{ .compatible = "ti,tas5825m", },
{ }
};
MODULE_DEVICE_TABLE(of, tas5825m_of_match);
#endif
static struct i2c_driver tas5825m_i2c_driver = {
.probe = tas5825m_i2c_probe,
.remove = tas5825m_i2c_remove,
.id_table = tas5825m_i2c_id,
.driver = {
.name = TAS5825M_DRV_NAME,
.of_match_table = tas5825m_of_match,
},
};
module_i2c_driver(tas5825m_i2c_driver);
MODULE_AUTHOR("Andy Liu <andy-liu@ti.com>");
MODULE_DESCRIPTION("TAS5825M Audio Amplifier Driver");
MODULE_LICENSE("GPL v2");