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linux-stable/sound/soc/codecs/max9867.c
Bhumika Goyal a180ba45b1 ASoC: codecs: add const to snd_soc_codec_driver structures 
Declare snd_soc_codec_driver structures as const as they are only passed
as an argument to the function snd_soc_register_codec. This argument is
of type const, so declare the structures with this property as const.
In file codecs/sn95031.c, snd_soc_codec_driver structure is also used in
a copy operation along with getting passed to snd_soc_register_codec.
So, it can be made const too.
Done using Coccinelle:

@match disable optional_qualifier@
identifier s;
position p;
@@
static struct snd_soc_codec_driver s@p={...};

@good1@
identifier match.s;
position p;
@@
snd_soc_register_codec(...,&s@p,...)

@bad@
identifier match.s;
position p!={match.p,good1.p};
@@
s@p

@depends on !bad disable optional_qualifier@
identifier match.s;
@@
static
+const
struct snd_soc_codec_driver s={...};

Signed-off-by: Bhumika Goyal <bhumirks@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2017-08-10 16:10:50 +01:00

546 lines
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/*
* max9867.c -- max9867 ALSA SoC Audio driver
*
* Copyright 2013-15 Maxim Integrated Products
*
* 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.
*/
#include <linux/delay.h>
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/regmap.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/tlv.h>
#include "max9867.h"
static const char *const max9867_spmode[] = {
"Stereo Diff", "Mono Diff",
"Stereo Cap", "Mono Cap",
"Stereo Single", "Mono Single",
"Stereo Single Fast", "Mono Single Fast"
};
static const char *const max9867_sidetone_text[] = {
"None", "Left", "Right", "LeftRight", "LeftRightDiv2",
};
static const char *const max9867_filter_text[] = {"IIR", "FIR"};
static SOC_ENUM_SINGLE_DECL(max9867_filter, MAX9867_CODECFLTR, 7,
max9867_filter_text);
static SOC_ENUM_SINGLE_DECL(max9867_spkmode, MAX9867_MODECONFIG, 0,
max9867_spmode);
static SOC_ENUM_SINGLE_DECL(max9867_sidetone, MAX9867_DACGAIN, 6,
max9867_sidetone_text);
static DECLARE_TLV_DB_SCALE(max9860_capture_tlv, -600, 200, 0);
static DECLARE_TLV_DB_SCALE(max9860_mic_tlv, 2000, 100, 1);
static DECLARE_TLV_DB_SCALE(max9860_adc_left_tlv, -1200, 100, 1);
static DECLARE_TLV_DB_SCALE(max9860_adc_right_tlv, -1200, 100, 1);
static const SNDRV_CTL_TLVD_DECLARE_DB_RANGE(max98088_micboost_tlv,
0, 1, TLV_DB_SCALE_ITEM(0, 2000, 0),
2, 2, TLV_DB_SCALE_ITEM(3000, 0, 0),
);
static const struct snd_kcontrol_new max9867_snd_controls[] = {
SOC_DOUBLE_R("Master Playback Volume", MAX9867_LEFTVOL,
MAX9867_RIGHTVOL, 0, 63, 1),
SOC_DOUBLE_R_TLV("Capture Volume", MAX9867_LEFTMICGAIN,
MAX9867_RIGHTMICGAIN,
0, 15, 1, max9860_capture_tlv),
SOC_DOUBLE_R_TLV("Mic Volume", MAX9867_LEFTMICGAIN,
MAX9867_RIGHTMICGAIN, 0, 31, 1, max9860_mic_tlv),
SOC_DOUBLE_R_TLV("Mic Boost Volume", MAX9867_LEFTMICGAIN,
MAX9867_RIGHTMICGAIN, 5, 3, 0, max98088_micboost_tlv),
SOC_ENUM("Digital Sidetone Src", max9867_sidetone),
SOC_SINGLE("Sidetone Volume", MAX9867_DACGAIN, 0, 31, 1),
SOC_SINGLE("DAC Volume", MAX9867_DACLEVEL, 4, 3, 0),
SOC_SINGLE("DAC Attenuation", MAX9867_DACLEVEL, 0, 15, 1),
SOC_SINGLE_TLV("ADC Left Volume", MAX9867_ADCLEVEL,
4, 15, 1, max9860_adc_left_tlv),
SOC_SINGLE_TLV("ADC Right Volume", MAX9867_ADCLEVEL,
0, 15, 1, max9860_adc_right_tlv),
SOC_ENUM("Speaker Mode", max9867_spkmode),
SOC_SINGLE("Volume Smoothing Switch", MAX9867_MODECONFIG, 6, 1, 0),
SOC_SINGLE("ZCD Switch", MAX9867_MODECONFIG, 5, 1, 0),
SOC_ENUM("DSP Filter", max9867_filter),
};
static const char *const max9867_mux[] = {"None", "Mic", "Line", "Mic_Line"};
static SOC_ENUM_SINGLE_DECL(max9867_mux_enum,
MAX9867_INPUTCONFIG, MAX9867_INPUT_SHIFT,
max9867_mux);
static const struct snd_kcontrol_new max9867_dapm_mux_controls =
SOC_DAPM_ENUM("Route", max9867_mux_enum);
static const struct snd_kcontrol_new max9867_left_dapm_control =
SOC_DAPM_SINGLE("Switch", MAX9867_PWRMAN, 6, 1, 0);
static const struct snd_kcontrol_new max9867_right_dapm_control =
SOC_DAPM_SINGLE("Switch", MAX9867_PWRMAN, 5, 1, 0);
static const struct snd_kcontrol_new max9867_line_dapm_control =
SOC_DAPM_SINGLE("Switch", MAX9867_LEFTLINELVL, 6, 1, 1);
static const struct snd_soc_dapm_widget max9867_dapm_widgets[] = {
SND_SOC_DAPM_AIF_IN("DAI_OUT", "HiFi Playback", 0, SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_DAC("Left DAC", NULL, MAX9867_PWRMAN, 3, 0),
SND_SOC_DAPM_DAC("Right DAC", NULL, MAX9867_PWRMAN, 2, 0),
SND_SOC_DAPM_MIXER("Output Mixer", SND_SOC_NOPM, 0, 0, NULL, 0),
SND_SOC_DAPM_OUTPUT("HPOUT"),
SND_SOC_DAPM_AIF_IN("DAI_IN", "HiFi Capture", 0, SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_ADC("Left ADC", "HiFi Capture", MAX9867_PWRMAN, 1, 0),
SND_SOC_DAPM_ADC("Right ADC", "HiFi Capture", MAX9867_PWRMAN, 0, 0),
SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0,
&max9867_dapm_mux_controls),
SND_SOC_DAPM_MIXER("Input Mixer", SND_SOC_NOPM, 0, 0, NULL, 0),
SND_SOC_DAPM_SWITCH("Left Line", MAX9867_LEFTLINELVL, 6, 1,
&max9867_left_dapm_control),
SND_SOC_DAPM_SWITCH("Right Line", MAX9867_RIGTHLINELVL, 6, 1,
&max9867_right_dapm_control),
SND_SOC_DAPM_SWITCH("Line Mixer", SND_SOC_NOPM, 0, 0,
&max9867_line_dapm_control),
SND_SOC_DAPM_INPUT("LINE_IN"),
};
static const struct snd_soc_dapm_route max9867_audio_map[] = {
{"Left DAC", NULL, "DAI_OUT"},
{"Right DAC", NULL, "DAI_OUT"},
{"Output Mixer", NULL, "Left DAC"},
{"Output Mixer", NULL, "Right DAC"},
{"HPOUT", NULL, "Output Mixer"},
{"Left ADC", NULL, "DAI_IN"},
{"Right ADC", NULL, "DAI_IN"},
{"Input Mixer", NULL, "Left ADC"},
{"Input Mixer", NULL, "Right ADC"},
{"Input Mux", "Line", "Input Mixer"},
{"Input Mux", "Mic", "Input Mixer"},
{"Input Mux", "Mic_Line", "Input Mixer"},
{"Right Line", "Switch", "Input Mux"},
{"Left Line", "Switch", "Input Mux"},
{"LINE_IN", NULL, "Left Line"},
{"LINE_IN", NULL, "Right Line"},
};
enum rates {
pcm_rate_8, pcm_rate_16, pcm_rate_24,
pcm_rate_32, pcm_rate_44,
pcm_rate_48, max_pcm_rate,
};
static const struct ni_div_rates {
u32 mclk;
u16 ni[max_pcm_rate];
} ni_div[] = {
{11289600, {0x116A, 0x22D4, 0x343F, 0x45A9, 0x6000, 0x687D} },
{12000000, {0x1062, 0x20C5, 0x3127, 0x4189, 0x5A51, 0x624E} },
{12288000, {0x1000, 0x2000, 0x3000, 0x4000, 0x5833, 0x6000} },
{13000000, {0x0F20, 0x1E3F, 0x2D5F, 0x3C7F, 0x535F, 0x5ABE} },
{19200000, {0x0A3D, 0x147B, 0x1EB8, 0x28F6, 0x3873, 0x3D71} },
{24000000, {0x1062, 0x20C5, 0x1893, 0x4189, 0x5A51, 0x624E} },
{26000000, {0x0F20, 0x1E3F, 0x16AF, 0x3C7F, 0x535F, 0x5ABE} },
{27000000, {0x0E90, 0x1D21, 0x15D8, 0x3A41, 0x5048, 0x5762} },
};
static inline int get_ni_value(int mclk, int rate)
{
int i, ret = 0;
/* find the closest rate index*/
for (i = 0; i < ARRAY_SIZE(ni_div); i++) {
if (ni_div[i].mclk >= mclk)
break;
}
if (i == ARRAY_SIZE(ni_div))
return -EINVAL;
switch (rate) {
case 8000:
return ni_div[i].ni[pcm_rate_8];
case 16000:
return ni_div[i].ni[pcm_rate_16];
case 32000:
return ni_div[i].ni[pcm_rate_32];
case 44100:
return ni_div[i].ni[pcm_rate_44];
case 48000:
return ni_div[i].ni[pcm_rate_48];
default:
pr_err("%s wrong rate %d\n", __func__, rate);
ret = -EINVAL;
}
return ret;
}
static int max9867_dai_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
{
struct snd_soc_codec *codec = dai->codec;
struct max9867_priv *max9867 = snd_soc_codec_get_drvdata(codec);
unsigned int ni_h, ni_l;
int value;
value = get_ni_value(max9867->sysclk, params_rate(params));
if (value < 0)
return value;
ni_h = (0xFF00 & value) >> 8;
ni_l = 0x00FF & value;
/* set up the ni value */
regmap_update_bits(max9867->regmap, MAX9867_AUDIOCLKHIGH,
MAX9867_NI_HIGH_MASK, ni_h);
regmap_update_bits(max9867->regmap, MAX9867_AUDIOCLKLOW,
MAX9867_NI_LOW_MASK, ni_l);
if (!max9867->master) {
/*
* digital pll locks on to any externally supplied LRCLK signal
* and also enable rapid lock mode.
*/
regmap_update_bits(max9867->regmap, MAX9867_AUDIOCLKLOW,
MAX9867_RAPID_LOCK, MAX9867_RAPID_LOCK);
regmap_update_bits(max9867->regmap, MAX9867_AUDIOCLKHIGH,
MAX9867_PLL, MAX9867_PLL);
} else {
unsigned long int bclk_rate, pclk_bclk_ratio;
int bclk_value;
bclk_rate = params_rate(params) * 2 * params_width(params);
pclk_bclk_ratio = max9867->pclk/bclk_rate;
switch (params_width(params)) {
case 8:
case 16:
switch (pclk_bclk_ratio) {
case 2:
bclk_value = MAX9867_IFC1B_PCLK_2;
break;
case 4:
bclk_value = MAX9867_IFC1B_PCLK_4;
break;
case 8:
bclk_value = MAX9867_IFC1B_PCLK_8;
break;
case 16:
bclk_value = MAX9867_IFC1B_PCLK_16;
break;
default:
dev_err(codec->dev,
"unsupported sampling rate\n");
return -EINVAL;
}
break;
case 24:
bclk_value = MAX9867_IFC1B_24BIT;
break;
case 32:
bclk_value = MAX9867_IFC1B_32BIT;
break;
default:
dev_err(codec->dev, "unsupported sampling rate\n");
return -EINVAL;
}
regmap_update_bits(max9867->regmap, MAX9867_IFC1B,
MAX9867_IFC1B_BCLK_MASK, bclk_value);
}
return 0;
}
static int max9867_prepare(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct snd_soc_codec *codec = dai->codec;
struct max9867_priv *max9867 = snd_soc_codec_get_drvdata(codec);
regmap_update_bits(max9867->regmap, MAX9867_PWRMAN,
MAX9867_SHTDOWN_MASK, MAX9867_SHTDOWN_MASK);
return 0;
}
static int max9867_mute(struct snd_soc_dai *dai, int mute)
{
struct snd_soc_codec *codec = dai->codec;
struct max9867_priv *max9867 = snd_soc_codec_get_drvdata(codec);
if (mute)
regmap_update_bits(max9867->regmap, MAX9867_DACLEVEL,
MAX9867_DAC_MUTE_MASK, MAX9867_DAC_MUTE_MASK);
else
regmap_update_bits(max9867->regmap, MAX9867_DACLEVEL,
MAX9867_DAC_MUTE_MASK, 0);
return 0;
}
static int max9867_set_dai_sysclk(struct snd_soc_dai *codec_dai,
int clk_id, unsigned int freq, int dir)
{
struct snd_soc_codec *codec = codec_dai->codec;
struct max9867_priv *max9867 = snd_soc_codec_get_drvdata(codec);
int value = 0;
/* Set the prescaler based on the master clock frequency*/
if (freq >= 10000000 && freq <= 20000000) {
value |= MAX9867_PSCLK_10_20;
max9867->pclk = freq;
} else if (freq >= 20000000 && freq <= 40000000) {
value |= MAX9867_PSCLK_20_40;
max9867->pclk = freq/2;
} else if (freq >= 40000000 && freq <= 60000000) {
value |= MAX9867_PSCLK_40_60;
max9867->pclk = freq/4;
} else {
pr_err("bad clock frequency %d", freq);
return -EINVAL;
}
value = value << MAX9867_PSCLK_SHIFT;
max9867->sysclk = freq;
/* exact integer mode is not supported */
value &= ~MAX9867_FREQ_MASK;
regmap_update_bits(max9867->regmap, MAX9867_SYSCLK,
MAX9867_PSCLK_MASK, value);
return 0;
}
static int max9867_dai_set_fmt(struct snd_soc_dai *codec_dai,
unsigned int fmt)
{
struct snd_soc_codec *codec = codec_dai->codec;
struct max9867_priv *max9867 = snd_soc_codec_get_drvdata(codec);
u8 iface1A = 0, iface1B = 0;
switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
case SND_SOC_DAIFMT_CBM_CFM:
max9867->master = 1;
iface1A |= MAX9867_MASTER;
break;
case SND_SOC_DAIFMT_CBS_CFS:
max9867->master = 0;
iface1A &= ~MAX9867_MASTER;
break;
default:
return -EINVAL;
}
/* for i2s compatible mode */
iface1A |= MAX9867_I2S_DLY;
/* SDOUT goes to hiz state after all data is transferred */
iface1A |= MAX9867_SDOUT_HIZ;
/* Clock inversion bits, BCI and WCI */
switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
case SND_SOC_DAIFMT_NB_NF:
break;
case SND_SOC_DAIFMT_IB_IF:
iface1A |= MAX9867_WCI_MODE | MAX9867_BCI_MODE;
break;
case SND_SOC_DAIFMT_IB_NF:
iface1A |= MAX9867_BCI_MODE;
break;
case SND_SOC_DAIFMT_NB_IF:
iface1A |= MAX9867_WCI_MODE;
break;
default:
return -EINVAL;
}
regmap_write(max9867->regmap, MAX9867_IFC1A, iface1A);
regmap_write(max9867->regmap, MAX9867_IFC1B, iface1B);
return 0;
}
static struct snd_soc_dai_ops max9867_dai_ops = {
.set_fmt = max9867_dai_set_fmt,
.set_sysclk = max9867_set_dai_sysclk,
.prepare = max9867_prepare,
.digital_mute = max9867_mute,
.hw_params = max9867_dai_hw_params,
};
#define MAX9867_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 |\
SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000)
#define MAX9867_FORMATS (SNDRV_PCM_FMTBIT_S16_LE)
static struct snd_soc_dai_driver max9867_dai[] = {
{
.name = "max9867-aif1",
.playback = {
.stream_name = "HiFi Playback",
.channels_min = 1,
.channels_max = 2,
.rates = MAX9867_RATES,
.formats = MAX9867_FORMATS,
},
.capture = {
.stream_name = "HiFi Capture",
.channels_min = 1,
.channels_max = 2,
.rates = MAX9867_RATES,
.formats = MAX9867_FORMATS,
},
.ops = &max9867_dai_ops,
}
};
#ifdef CONFIG_PM_SLEEP
static int max9867_suspend(struct device *dev)
{
struct max9867_priv *max9867 = dev_get_drvdata(dev);
/* Drop down to power saving mode when system is suspended */
regmap_update_bits(max9867->regmap, MAX9867_PWRMAN,
MAX9867_SHTDOWN_MASK, ~MAX9867_SHTDOWN_MASK);
return 0;
}
static int max9867_resume(struct device *dev)
{
struct max9867_priv *max9867 = dev_get_drvdata(dev);
regmap_update_bits(max9867->regmap, MAX9867_PWRMAN,
MAX9867_SHTDOWN_MASK, MAX9867_SHTDOWN_MASK);
return 0;
}
#endif
static int max9867_probe(struct snd_soc_codec *codec)
{
struct max9867_priv *max9867 = snd_soc_codec_get_drvdata(codec);
dev_dbg(codec->dev, "max98090_probe\n");
max9867->codec = codec;
return 0;
}
static const struct snd_soc_codec_driver max9867_codec = {
.probe = max9867_probe,
.component_driver = {
.controls = max9867_snd_controls,
.num_controls = ARRAY_SIZE(max9867_snd_controls),
.dapm_routes = max9867_audio_map,
.num_dapm_routes = ARRAY_SIZE(max9867_audio_map),
.dapm_widgets = max9867_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(max9867_dapm_widgets),
},
};
static bool max9867_volatile_register(struct device *dev, unsigned int reg)
{
switch (reg) {
case MAX9867_STATUS:
case MAX9867_JACKSTATUS:
case MAX9867_AUXHIGH:
case MAX9867_AUXLOW:
return true;
default:
return false;
}
}
static const struct reg_default max9867_reg[] = {
{ 0x04, 0x00 },
{ 0x05, 0x00 },
{ 0x06, 0x00 },
{ 0x07, 0x00 },
{ 0x08, 0x00 },
{ 0x09, 0x00 },
{ 0x0A, 0x00 },
{ 0x0B, 0x00 },
{ 0x0C, 0x00 },
{ 0x0D, 0x00 },
{ 0x0E, 0x00 },
{ 0x0F, 0x00 },
{ 0x10, 0x00 },
{ 0x11, 0x00 },
{ 0x12, 0x00 },
{ 0x13, 0x00 },
{ 0x14, 0x00 },
{ 0x15, 0x00 },
{ 0x16, 0x00 },
{ 0x17, 0x00 },
};
static const struct regmap_config max9867_regmap = {
.reg_bits = 8,
.val_bits = 8,
.max_register = MAX9867_REVISION,
.reg_defaults = max9867_reg,
.num_reg_defaults = ARRAY_SIZE(max9867_reg),
.volatile_reg = max9867_volatile_register,
.cache_type = REGCACHE_RBTREE,
};
static int max9867_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
struct max9867_priv *max9867;
int ret = 0, reg;
max9867 = devm_kzalloc(&i2c->dev,
sizeof(*max9867), GFP_KERNEL);
if (!max9867)
return -ENOMEM;
i2c_set_clientdata(i2c, max9867);
max9867->regmap = devm_regmap_init_i2c(i2c, &max9867_regmap);
if (IS_ERR(max9867->regmap)) {
ret = PTR_ERR(max9867->regmap);
dev_err(&i2c->dev,
"Failed to allocate regmap: %d\n", ret);
return ret;
}
ret = regmap_read(max9867->regmap,
MAX9867_REVISION, &reg);
if (ret < 0) {
dev_err(&i2c->dev, "Failed to read: %d\n", ret);
return ret;
}
dev_info(&i2c->dev, "device revision: %x\n", reg);
ret = snd_soc_register_codec(&i2c->dev, &max9867_codec,
max9867_dai, ARRAY_SIZE(max9867_dai));
if (ret < 0) {
dev_err(&i2c->dev, "Failed to register codec: %d\n", ret);
return ret;
}
return ret;
}
static int max9867_i2c_remove(struct i2c_client *client)
{
snd_soc_unregister_codec(&client->dev);
return 0;
}
static const struct i2c_device_id max9867_i2c_id[] = {
{ "max9867", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, max9867_i2c_id);
static const struct of_device_id max9867_of_match[] = {
{ .compatible = "maxim,max9867", },
{ }
};
MODULE_DEVICE_TABLE(of, max9867_of_match);
static const struct dev_pm_ops max9867_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(max9867_suspend, max9867_resume)
};
static struct i2c_driver max9867_i2c_driver = {
.driver = {
.name = "max9867",
.of_match_table = of_match_ptr(max9867_of_match),
.pm = &max9867_pm_ops,
},
.probe = max9867_i2c_probe,
.remove = max9867_i2c_remove,
.id_table = max9867_i2c_id,
};
module_i2c_driver(max9867_i2c_driver);
MODULE_AUTHOR("anish kumar <yesanishhere@gmail.com>");
MODULE_DESCRIPTION("ALSA SoC MAX9867 driver");
MODULE_LICENSE("GPL");
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