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linux-stable/sound/soc/codecs/max9850.c
Alexander A. Klimov 5856d8bd30
ASoC: Replace HTTP links with HTTPS ones 
Rationale:
Reduces attack surface on kernel devs opening the links for MITM
as HTTPS traffic is much harder to manipulate.

Deterministic algorithm:
For each file:
  If not .svg:
    For each line:
      If doesn't contain `\bxmlns\b`:
        For each link, `\bhttp://[^# \t\r\n]*(?:\w|/)`:
	  If neither `\bgnu\.org/license`, nor `\bmozilla\.org/MPL\b`:
            If both the HTTP and HTTPS versions
            return 200 OK and serve the same content:
              Replace HTTP with HTTPS.

Signed-off-by: Alexander A. Klimov <grandmaster@al2klimov.de>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20200719153822.59788-1-grandmaster@al2klimov.de
Signed-off-by: Mark Brown <broonie@kernel.org>
2020-07-22 14:31:55 +01:00

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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* max9850.c -- codec driver for max9850
*
* Copyright (C) 2011 taskit GmbH
*
* Author: Christian Glindkamp <christian.glindkamp@taskit.de>
*
* Initial development of this code was funded by
* MICRONIC Computer Systeme GmbH, https://www.mcsberlin.de/
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/i2c.h>
#include <linux/regmap.h>
#include <linux/slab.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/tlv.h>
#include "max9850.h"
struct max9850_priv {
struct regmap *regmap;
unsigned int sysclk;
};
/* these registers are not used at the moment but provided for the sake of
* completeness */
static bool max9850_volatile_register(struct device *dev, unsigned int reg)
{
switch (reg) {
case MAX9850_STATUSA:
case MAX9850_STATUSB:
return true;
default:
return false;
}
}
static const struct regmap_config max9850_regmap = {
.reg_bits = 8,
.val_bits = 8,
.max_register = MAX9850_DIGITAL_AUDIO,
.volatile_reg = max9850_volatile_register,
.cache_type = REGCACHE_RBTREE,
};
static const DECLARE_TLV_DB_RANGE(max9850_tlv,
0x18, 0x1f, TLV_DB_SCALE_ITEM(-7450, 400, 0),
0x20, 0x33, TLV_DB_SCALE_ITEM(-4150, 200, 0),
0x34, 0x37, TLV_DB_SCALE_ITEM(-150, 100, 0),
0x38, 0x3f, TLV_DB_SCALE_ITEM(250, 50, 0)
);
static const struct snd_kcontrol_new max9850_controls[] = {
SOC_SINGLE_TLV("Headphone Volume", MAX9850_VOLUME, 0, 0x3f, 1, max9850_tlv),
SOC_SINGLE("Headphone Switch", MAX9850_VOLUME, 7, 1, 1),
SOC_SINGLE("Mono Switch", MAX9850_GENERAL_PURPOSE, 2, 1, 0),
};
static const struct snd_kcontrol_new max9850_mixer_controls[] = {
SOC_DAPM_SINGLE("Line In Switch", MAX9850_ENABLE, 1, 1, 0),
};
static const struct snd_soc_dapm_widget max9850_dapm_widgets[] = {
SND_SOC_DAPM_SUPPLY("Charge Pump 1", MAX9850_ENABLE, 4, 0, NULL, 0),
SND_SOC_DAPM_SUPPLY("Charge Pump 2", MAX9850_ENABLE, 5, 0, NULL, 0),
SND_SOC_DAPM_SUPPLY("MCLK", MAX9850_ENABLE, 6, 0, NULL, 0),
SND_SOC_DAPM_SUPPLY("SHDN", MAX9850_ENABLE, 7, 0, NULL, 0),
SND_SOC_DAPM_MIXER_NAMED_CTL("Output Mixer", MAX9850_ENABLE, 2, 0,
&max9850_mixer_controls[0],
ARRAY_SIZE(max9850_mixer_controls)),
SND_SOC_DAPM_PGA("Headphone Output", MAX9850_ENABLE, 3, 0, NULL, 0),
SND_SOC_DAPM_DAC("DAC", "HiFi Playback", MAX9850_ENABLE, 0, 0),
SND_SOC_DAPM_OUTPUT("OUTL"),
SND_SOC_DAPM_OUTPUT("HPL"),
SND_SOC_DAPM_OUTPUT("OUTR"),
SND_SOC_DAPM_OUTPUT("HPR"),
SND_SOC_DAPM_MIXER("Line Input", SND_SOC_NOPM, 0, 0, NULL, 0),
SND_SOC_DAPM_INPUT("INL"),
SND_SOC_DAPM_INPUT("INR"),
};
static const struct snd_soc_dapm_route max9850_dapm_routes[] = {
/* output mixer */
{"Output Mixer", NULL, "DAC"},
{"Output Mixer", "Line In Switch", "Line Input"},
/* outputs */
{"Headphone Output", NULL, "Output Mixer"},
{"HPL", NULL, "Headphone Output"},
{"HPR", NULL, "Headphone Output"},
{"OUTL", NULL, "Output Mixer"},
{"OUTR", NULL, "Output Mixer"},
/* inputs */
{"Line Input", NULL, "INL"},
{"Line Input", NULL, "INR"},
/* supplies */
{"Output Mixer", NULL, "Charge Pump 1"},
{"Output Mixer", NULL, "Charge Pump 2"},
{"Output Mixer", NULL, "SHDN"},
{"DAC", NULL, "MCLK"},
};
static int max9850_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct snd_soc_component *component = dai->component;
struct max9850_priv *max9850 = snd_soc_component_get_drvdata(component);
u64 lrclk_div;
u8 sf, da;
if (!max9850->sysclk)
return -EINVAL;
/* lrclk_div = 2^22 * rate / iclk with iclk = mclk / sf */
sf = (snd_soc_component_read(component, MAX9850_CLOCK) >> 2) + 1;
lrclk_div = (1 << 22);
lrclk_div *= params_rate(params);
lrclk_div *= sf;
do_div(lrclk_div, max9850->sysclk);
snd_soc_component_write(component, MAX9850_LRCLK_MSB, (lrclk_div >> 8) & 0x7f);
snd_soc_component_write(component, MAX9850_LRCLK_LSB, lrclk_div & 0xff);
switch (params_width(params)) {
case 16:
da = 0;
break;
case 20:
da = 0x2;
break;
case 24:
da = 0x3;
break;
default:
return -EINVAL;
}
snd_soc_component_update_bits(component, MAX9850_DIGITAL_AUDIO, 0x3, da);
return 0;
}
static int max9850_set_dai_sysclk(struct snd_soc_dai *codec_dai,
int clk_id, unsigned int freq, int dir)
{
struct snd_soc_component *component = codec_dai->component;
struct max9850_priv *max9850 = snd_soc_component_get_drvdata(component);
/* calculate mclk -> iclk divider */
if (freq <= 13000000)
snd_soc_component_write(component, MAX9850_CLOCK, 0x0);
else if (freq <= 26000000)
snd_soc_component_write(component, MAX9850_CLOCK, 0x4);
else if (freq <= 40000000)
snd_soc_component_write(component, MAX9850_CLOCK, 0x8);
else
return -EINVAL;
max9850->sysclk = freq;
return 0;
}
static int max9850_set_dai_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt)
{
struct snd_soc_component *component = codec_dai->component;
u8 da = 0;
/* set master/slave audio interface */
switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
case SND_SOC_DAIFMT_CBM_CFM:
da |= MAX9850_MASTER;
break;
case SND_SOC_DAIFMT_CBS_CFS:
break;
default:
return -EINVAL;
}
/* interface format */
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_I2S:
da |= MAX9850_DLY;
break;
case SND_SOC_DAIFMT_RIGHT_J:
da |= MAX9850_RTJ;
break;
case SND_SOC_DAIFMT_LEFT_J:
break;
default:
return -EINVAL;
}
/* clock inversion */
switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
case SND_SOC_DAIFMT_NB_NF:
break;
case SND_SOC_DAIFMT_IB_IF:
da |= MAX9850_BCINV | MAX9850_INV;
break;
case SND_SOC_DAIFMT_IB_NF:
da |= MAX9850_BCINV;
break;
case SND_SOC_DAIFMT_NB_IF:
da |= MAX9850_INV;
break;
default:
return -EINVAL;
}
/* set da */
snd_soc_component_write(component, MAX9850_DIGITAL_AUDIO, da);
return 0;
}
static int max9850_set_bias_level(struct snd_soc_component *component,
enum snd_soc_bias_level level)
{
struct max9850_priv *max9850 = snd_soc_component_get_drvdata(component);
int ret;
switch (level) {
case SND_SOC_BIAS_ON:
break;
case SND_SOC_BIAS_PREPARE:
break;
case SND_SOC_BIAS_STANDBY:
if (snd_soc_component_get_bias_level(component) == SND_SOC_BIAS_OFF) {
ret = regcache_sync(max9850->regmap);
if (ret) {
dev_err(component->dev,
"Failed to sync cache: %d\n", ret);
return ret;
}
}
break;
case SND_SOC_BIAS_OFF:
break;
}
return 0;
}
#define MAX9850_RATES SNDRV_PCM_RATE_8000_48000
#define MAX9850_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
SNDRV_PCM_FMTBIT_S24_LE)
static const struct snd_soc_dai_ops max9850_dai_ops = {
.hw_params = max9850_hw_params,
.set_sysclk = max9850_set_dai_sysclk,
.set_fmt = max9850_set_dai_fmt,
};
static struct snd_soc_dai_driver max9850_dai = {
.name = "max9850-hifi",
.playback = {
.stream_name = "Playback",
.channels_min = 1,
.channels_max = 2,
.rates = MAX9850_RATES,
.formats = MAX9850_FORMATS
},
.ops = &max9850_dai_ops,
};
static int max9850_probe(struct snd_soc_component *component)
{
/* enable zero-detect */
snd_soc_component_update_bits(component, MAX9850_GENERAL_PURPOSE, 1, 1);
/* enable slew-rate control */
snd_soc_component_update_bits(component, MAX9850_VOLUME, 0x40, 0x40);
/* set slew-rate 125ms */
snd_soc_component_update_bits(component, MAX9850_CHARGE_PUMP, 0xff, 0xc0);
return 0;
}
static const struct snd_soc_component_driver soc_component_dev_max9850 = {
.probe = max9850_probe,
.set_bias_level = max9850_set_bias_level,
.controls = max9850_controls,
.num_controls = ARRAY_SIZE(max9850_controls),
.dapm_widgets = max9850_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(max9850_dapm_widgets),
.dapm_routes = max9850_dapm_routes,
.num_dapm_routes = ARRAY_SIZE(max9850_dapm_routes),
.suspend_bias_off = 1,
.idle_bias_on = 1,
.use_pmdown_time = 1,
.endianness = 1,
.non_legacy_dai_naming = 1,
};
static int max9850_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
struct max9850_priv *max9850;
int ret;
max9850 = devm_kzalloc(&i2c->dev, sizeof(struct max9850_priv),
GFP_KERNEL);
if (max9850 == NULL)
return -ENOMEM;
max9850->regmap = devm_regmap_init_i2c(i2c, &max9850_regmap);
if (IS_ERR(max9850->regmap))
return PTR_ERR(max9850->regmap);
i2c_set_clientdata(i2c, max9850);
ret = devm_snd_soc_register_component(&i2c->dev,
&soc_component_dev_max9850, &max9850_dai, 1);
return ret;
}
static const struct i2c_device_id max9850_i2c_id[] = {
{ "max9850", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, max9850_i2c_id);
static struct i2c_driver max9850_i2c_driver = {
.driver = {
.name = "max9850",
},
.probe = max9850_i2c_probe,
.id_table = max9850_i2c_id,
};
module_i2c_driver(max9850_i2c_driver);
MODULE_AUTHOR("Christian Glindkamp <christian.glindkamp@taskit.de>");
MODULE_DESCRIPTION("ASoC MAX9850 codec driver");
MODULE_LICENSE("GPL");
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