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Other Parts Discussed in Thread: TAS5825P, TAS5805M
https://e2e.ti.com/support/audio-group/audio/f/audio-forum/1222065/tas5825p-sample-code
器件型号：TAS5825P您好！
我是否可以知道有 TAS5825P 的示例代码？ 
谢谢！
Jeff
Jeff、您好！
有关示例代码、请参阅该主题： https://e2e.ti.com/support/audio-group/audio/f/audio-forum/722027/linux-tas5825m-linux-drivers
此致、
路易斯
Jeff、您好！
TAS5805M 和 TAS5825P 的示例非常相似、但请注意有关如何生成头文件的指南、因为其中将包含您在 PPC3中生成的所有器件配置。 此代码仅供参考、任何其他修改需要由您的固件设计人员处理、因为我们不提供软件支持。
/*
* 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");