a180ba45b1
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>
246 lines
6.0 KiB
C
246 lines
6.0 KiB
C
/*
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* PCM179X ASoC codec driver
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*
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* Copyright (c) Amarula Solutions B.V. 2013
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*
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* Michael Trimarchi <michael@amarulasolutions.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/kernel.h>
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#include <linux/device.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include <sound/pcm_params.h>
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#include <sound/initval.h>
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#include <sound/soc.h>
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#include <sound/tlv.h>
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#include <linux/of.h>
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#include "pcm179x.h"
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#define PCM179X_DAC_VOL_LEFT 0x10
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#define PCM179X_DAC_VOL_RIGHT 0x11
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#define PCM179X_FMT_CONTROL 0x12
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#define PCM179X_MODE_CONTROL 0x13
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#define PCM179X_SOFT_MUTE PCM179X_FMT_CONTROL
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#define PCM179X_FMT_MASK 0x70
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#define PCM179X_FMT_SHIFT 4
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#define PCM179X_MUTE_MASK 0x01
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#define PCM179X_MUTE_SHIFT 0
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#define PCM179X_ATLD_ENABLE (1 << 7)
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static const struct reg_default pcm179x_reg_defaults[] = {
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{ 0x10, 0xff },
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{ 0x11, 0xff },
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{ 0x12, 0x50 },
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{ 0x13, 0x00 },
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{ 0x14, 0x00 },
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{ 0x15, 0x01 },
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{ 0x16, 0x00 },
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{ 0x17, 0x00 },
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};
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static bool pcm179x_accessible_reg(struct device *dev, unsigned int reg)
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{
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return reg >= 0x10 && reg <= 0x17;
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}
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static bool pcm179x_writeable_reg(struct device *dev, unsigned int reg)
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{
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bool accessible;
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accessible = pcm179x_accessible_reg(dev, reg);
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return accessible && reg != 0x16 && reg != 0x17;
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}
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struct pcm179x_private {
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struct regmap *regmap;
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unsigned int format;
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unsigned int rate;
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};
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static int pcm179x_set_dai_fmt(struct snd_soc_dai *codec_dai,
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unsigned int format)
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{
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struct snd_soc_codec *codec = codec_dai->codec;
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struct pcm179x_private *priv = snd_soc_codec_get_drvdata(codec);
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priv->format = format;
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return 0;
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}
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static int pcm179x_digital_mute(struct snd_soc_dai *dai, int mute)
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{
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struct snd_soc_codec *codec = dai->codec;
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struct pcm179x_private *priv = snd_soc_codec_get_drvdata(codec);
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int ret;
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ret = regmap_update_bits(priv->regmap, PCM179X_SOFT_MUTE,
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PCM179X_MUTE_MASK, !!mute);
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if (ret < 0)
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return ret;
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return 0;
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}
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static int pcm179x_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params,
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struct snd_soc_dai *dai)
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{
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struct snd_soc_codec *codec = dai->codec;
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struct pcm179x_private *priv = snd_soc_codec_get_drvdata(codec);
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int val = 0, ret;
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priv->rate = params_rate(params);
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switch (priv->format & SND_SOC_DAIFMT_FORMAT_MASK) {
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case SND_SOC_DAIFMT_RIGHT_J:
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switch (params_width(params)) {
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case 24:
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case 32:
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val = 2;
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break;
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case 16:
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val = 0;
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break;
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default:
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return -EINVAL;
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}
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break;
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case SND_SOC_DAIFMT_I2S:
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switch (params_width(params)) {
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case 24:
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case 32:
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val = 5;
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break;
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case 16:
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val = 4;
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break;
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default:
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return -EINVAL;
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}
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break;
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default:
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dev_err(codec->dev, "Invalid DAI format\n");
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return -EINVAL;
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}
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val = val << PCM179X_FMT_SHIFT | PCM179X_ATLD_ENABLE;
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ret = regmap_update_bits(priv->regmap, PCM179X_FMT_CONTROL,
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PCM179X_FMT_MASK | PCM179X_ATLD_ENABLE, val);
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if (ret < 0)
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return ret;
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return 0;
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}
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static const struct snd_soc_dai_ops pcm179x_dai_ops = {
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.set_fmt = pcm179x_set_dai_fmt,
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.hw_params = pcm179x_hw_params,
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.digital_mute = pcm179x_digital_mute,
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};
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static const DECLARE_TLV_DB_SCALE(pcm179x_dac_tlv, -12000, 50, 1);
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static const struct snd_kcontrol_new pcm179x_controls[] = {
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SOC_DOUBLE_R_RANGE_TLV("DAC Playback Volume", PCM179X_DAC_VOL_LEFT,
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PCM179X_DAC_VOL_RIGHT, 0, 0xf, 0xff, 0,
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pcm179x_dac_tlv),
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SOC_SINGLE("DAC Invert Output Switch", PCM179X_MODE_CONTROL, 7, 1, 0),
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SOC_SINGLE("DAC Rolloff Filter Switch", PCM179X_MODE_CONTROL, 1, 1, 0),
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};
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static const struct snd_soc_dapm_widget pcm179x_dapm_widgets[] = {
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SND_SOC_DAPM_OUTPUT("IOUTL+"),
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SND_SOC_DAPM_OUTPUT("IOUTL-"),
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SND_SOC_DAPM_OUTPUT("IOUTR+"),
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SND_SOC_DAPM_OUTPUT("IOUTR-"),
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};
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static const struct snd_soc_dapm_route pcm179x_dapm_routes[] = {
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{ "IOUTL+", NULL, "Playback" },
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{ "IOUTL-", NULL, "Playback" },
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{ "IOUTR+", NULL, "Playback" },
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{ "IOUTR-", NULL, "Playback" },
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};
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static struct snd_soc_dai_driver pcm179x_dai = {
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.name = "pcm179x-hifi",
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.playback = {
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.stream_name = "Playback",
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.channels_min = 2,
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.channels_max = 2,
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.rates = SNDRV_PCM_RATE_CONTINUOUS,
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.rate_min = 10000,
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.rate_max = 200000,
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.formats = PCM1792A_FORMATS, },
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.ops = &pcm179x_dai_ops,
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};
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const struct regmap_config pcm179x_regmap_config = {
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.reg_bits = 8,
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.val_bits = 8,
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.max_register = 23,
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.reg_defaults = pcm179x_reg_defaults,
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.num_reg_defaults = ARRAY_SIZE(pcm179x_reg_defaults),
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.writeable_reg = pcm179x_writeable_reg,
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.readable_reg = pcm179x_accessible_reg,
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};
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EXPORT_SYMBOL_GPL(pcm179x_regmap_config);
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static const struct snd_soc_codec_driver soc_codec_dev_pcm179x = {
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.component_driver = {
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.controls = pcm179x_controls,
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.num_controls = ARRAY_SIZE(pcm179x_controls),
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.dapm_widgets = pcm179x_dapm_widgets,
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.num_dapm_widgets = ARRAY_SIZE(pcm179x_dapm_widgets),
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.dapm_routes = pcm179x_dapm_routes,
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.num_dapm_routes = ARRAY_SIZE(pcm179x_dapm_routes),
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},
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};
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int pcm179x_common_init(struct device *dev, struct regmap *regmap)
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{
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struct pcm179x_private *pcm179x;
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pcm179x = devm_kzalloc(dev, sizeof(struct pcm179x_private),
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GFP_KERNEL);
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if (!pcm179x)
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return -ENOMEM;
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pcm179x->regmap = regmap;
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dev_set_drvdata(dev, pcm179x);
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return snd_soc_register_codec(dev,
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&soc_codec_dev_pcm179x, &pcm179x_dai, 1);
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}
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EXPORT_SYMBOL_GPL(pcm179x_common_init);
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int pcm179x_common_exit(struct device *dev)
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{
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snd_soc_unregister_codec(dev);
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return 0;
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}
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EXPORT_SYMBOL_GPL(pcm179x_common_exit);
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MODULE_DESCRIPTION("ASoC PCM179X driver");
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MODULE_AUTHOR("Michael Trimarchi <michael@amarulasolutions.com>");
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MODULE_LICENSE("GPL");
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