259 lines
6.6 KiB
C
259 lines
6.6 KiB
C
/*
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* PCM1792A 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 <linux/spi/spi.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 <linux/of_device.h>
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#include "pcm1792a.h"
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#define PCM1792A_DAC_VOL_LEFT 0x10
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#define PCM1792A_DAC_VOL_RIGHT 0x11
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#define PCM1792A_FMT_CONTROL 0x12
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#define PCM1792A_SOFT_MUTE PCM1792A_FMT_CONTROL
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#define PCM1792A_FMT_MASK 0x70
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#define PCM1792A_FMT_SHIFT 4
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#define PCM1792A_MUTE_MASK 0x01
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#define PCM1792A_MUTE_SHIFT 0
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#define PCM1792A_ATLD_ENABLE (1 << 7)
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static const struct reg_default pcm1792a_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 pcm1792a_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 pcm1792a_writeable_reg(struct device *dev, unsigned register reg)
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{
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bool accessible;
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accessible = pcm1792a_accessible_reg(dev, reg);
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return accessible && reg != 0x16 && reg != 0x17;
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}
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struct pcm1792a_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 pcm1792a_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 pcm1792a_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 pcm1792a_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 pcm1792a_private *priv = snd_soc_codec_get_drvdata(codec);
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int ret;
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ret = regmap_update_bits(priv->regmap, PCM1792A_SOFT_MUTE,
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PCM1792A_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 pcm1792a_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 pcm1792a_private *priv = snd_soc_codec_get_drvdata(codec);
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int val = 0, ret;
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int pcm_format = params_format(params);
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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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if (pcm_format == SNDRV_PCM_FORMAT_S24_LE ||
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pcm_format == SNDRV_PCM_FORMAT_S32_LE)
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val = 0x02;
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else if (pcm_format == SNDRV_PCM_FORMAT_S16_LE)
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val = 0x00;
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break;
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case SND_SOC_DAIFMT_I2S:
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if (pcm_format == SNDRV_PCM_FORMAT_S24_LE ||
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pcm_format == SNDRV_PCM_FORMAT_S32_LE)
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val = 0x05;
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else if (pcm_format == SNDRV_PCM_FORMAT_S16_LE)
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val = 0x04;
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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 << PCM1792A_FMT_SHIFT | PCM1792A_ATLD_ENABLE;
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ret = regmap_update_bits(priv->regmap, PCM1792A_FMT_CONTROL,
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PCM1792A_FMT_MASK | PCM1792A_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 pcm1792a_dai_ops = {
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.set_fmt = pcm1792a_set_dai_fmt,
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.hw_params = pcm1792a_hw_params,
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.digital_mute = pcm1792a_digital_mute,
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};
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static const DECLARE_TLV_DB_SCALE(pcm1792a_dac_tlv, -12000, 50, 1);
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static const struct snd_kcontrol_new pcm1792a_controls[] = {
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SOC_DOUBLE_R_RANGE_TLV("DAC Playback Volume", PCM1792A_DAC_VOL_LEFT,
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PCM1792A_DAC_VOL_RIGHT, 0, 0xf, 0xff, 0,
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pcm1792a_dac_tlv),
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};
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static const struct snd_soc_dapm_widget pcm1792a_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 pcm1792a_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 pcm1792a_dai = {
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.name = "pcm1792a-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 = PCM1792A_RATES,
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.formats = PCM1792A_FORMATS, },
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.ops = &pcm1792a_dai_ops,
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};
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static const struct of_device_id pcm1792a_of_match[] = {
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{ .compatible = "ti,pcm1792a", },
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{ }
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};
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MODULE_DEVICE_TABLE(of, pcm1792a_of_match);
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static const struct regmap_config pcm1792a_regmap = {
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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 = pcm1792a_reg_defaults,
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.num_reg_defaults = ARRAY_SIZE(pcm1792a_reg_defaults),
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.writeable_reg = pcm1792a_writeable_reg,
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.readable_reg = pcm1792a_accessible_reg,
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};
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static struct snd_soc_codec_driver soc_codec_dev_pcm1792a = {
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.controls = pcm1792a_controls,
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.num_controls = ARRAY_SIZE(pcm1792a_controls),
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.dapm_widgets = pcm1792a_dapm_widgets,
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.num_dapm_widgets = ARRAY_SIZE(pcm1792a_dapm_widgets),
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.dapm_routes = pcm1792a_dapm_routes,
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.num_dapm_routes = ARRAY_SIZE(pcm1792a_dapm_routes),
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};
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static int pcm1792a_spi_probe(struct spi_device *spi)
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{
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struct pcm1792a_private *pcm1792a;
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int ret;
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pcm1792a = devm_kzalloc(&spi->dev, sizeof(struct pcm1792a_private),
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GFP_KERNEL);
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if (!pcm1792a)
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return -ENOMEM;
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spi_set_drvdata(spi, pcm1792a);
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pcm1792a->regmap = devm_regmap_init_spi(spi, &pcm1792a_regmap);
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if (IS_ERR(pcm1792a->regmap)) {
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ret = PTR_ERR(pcm1792a->regmap);
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dev_err(&spi->dev, "Failed to register regmap: %d\n", ret);
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return ret;
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}
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return snd_soc_register_codec(&spi->dev,
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&soc_codec_dev_pcm1792a, &pcm1792a_dai, 1);
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}
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static int pcm1792a_spi_remove(struct spi_device *spi)
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{
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snd_soc_unregister_codec(&spi->dev);
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return 0;
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}
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static const struct spi_device_id pcm1792a_spi_ids[] = {
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{ "pcm1792a", 0 },
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{ },
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};
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MODULE_DEVICE_TABLE(spi, pcm1792a_spi_ids);
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static struct spi_driver pcm1792a_codec_driver = {
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.driver = {
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.name = "pcm1792a",
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.owner = THIS_MODULE,
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.of_match_table = of_match_ptr(pcm1792a_of_match),
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},
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.id_table = pcm1792a_spi_ids,
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.probe = pcm1792a_spi_probe,
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.remove = pcm1792a_spi_remove,
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};
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module_spi_driver(pcm1792a_codec_driver);
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MODULE_DESCRIPTION("ASoC PCM1792A driver");
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MODULE_AUTHOR("Michael Trimarchi <michael@amarulasolutions.com>");
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MODULE_LICENSE("GPL");
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