353 lines
8.7 KiB
C
353 lines
8.7 KiB
C
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/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* Cirrus Logic CS4341A ALSA SoC Codec Driver
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* Author: Alexander Shiyan <shc_work@mail.ru>
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*/
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#include <linux/i2c.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/regmap.h>
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#include <linux/spi/spi.h>
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#include <sound/pcm.h>
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#include <sound/pcm_params.h>
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#include <sound/soc.h>
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#include <sound/tlv.h>
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#define CS4341_REG_MODE1 0x00
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#define CS4341_REG_MODE2 0x01
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#define CS4341_REG_MIX 0x02
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#define CS4341_REG_VOLA 0x03
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#define CS4341_REG_VOLB 0x04
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#define CS4341_MODE2_DIF (7 << 4)
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#define CS4341_MODE2_DIF_I2S_24 (0 << 4)
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#define CS4341_MODE2_DIF_I2S_16 (1 << 4)
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#define CS4341_MODE2_DIF_LJ_24 (2 << 4)
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#define CS4341_MODE2_DIF_RJ_24 (3 << 4)
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#define CS4341_MODE2_DIF_RJ_16 (5 << 4)
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#define CS4341_VOLX_MUTE (1 << 7)
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struct cs4341_priv {
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unsigned int fmt;
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struct regmap *regmap;
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struct regmap_config regcfg;
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};
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static const struct reg_default cs4341_reg_defaults[] = {
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{ CS4341_REG_MODE1, 0x00 },
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{ CS4341_REG_MODE2, 0x82 },
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{ CS4341_REG_MIX, 0x49 },
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{ CS4341_REG_VOLA, 0x80 },
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{ CS4341_REG_VOLB, 0x80 },
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};
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static int cs4341_set_fmt(struct snd_soc_dai *dai, unsigned int format)
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{
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struct snd_soc_component *component = dai->component;
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struct cs4341_priv *cs4341 = snd_soc_component_get_drvdata(component);
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switch (format & SND_SOC_DAIFMT_MASTER_MASK) {
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case SND_SOC_DAIFMT_CBS_CFS:
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break;
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default:
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return -EINVAL;
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}
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switch (format & SND_SOC_DAIFMT_INV_MASK) {
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case SND_SOC_DAIFMT_NB_NF:
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break;
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default:
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return -EINVAL;
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}
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switch (format & SND_SOC_DAIFMT_FORMAT_MASK) {
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case SND_SOC_DAIFMT_I2S:
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case SND_SOC_DAIFMT_LEFT_J:
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case SND_SOC_DAIFMT_RIGHT_J:
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cs4341->fmt = format & SND_SOC_DAIFMT_FORMAT_MASK;
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break;
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default:
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return -EINVAL;
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}
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return 0;
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}
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static int cs4341_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_component *component = dai->component;
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struct cs4341_priv *cs4341 = snd_soc_component_get_drvdata(component);
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unsigned int mode = 0;
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int b24 = 0;
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switch (params_format(params)) {
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case SNDRV_PCM_FORMAT_S24_LE:
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b24 = 1;
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break;
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case SNDRV_PCM_FORMAT_S16_LE:
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break;
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default:
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dev_err(component->dev, "Unsupported PCM format 0x%08x.\n",
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params_format(params));
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return -EINVAL;
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}
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switch (cs4341->fmt) {
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case SND_SOC_DAIFMT_I2S:
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mode = b24 ? CS4341_MODE2_DIF_I2S_24 : CS4341_MODE2_DIF_I2S_16;
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break;
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case SND_SOC_DAIFMT_LEFT_J:
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mode = CS4341_MODE2_DIF_LJ_24;
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break;
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case SND_SOC_DAIFMT_RIGHT_J:
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mode = b24 ? CS4341_MODE2_DIF_RJ_24 : CS4341_MODE2_DIF_RJ_16;
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break;
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default:
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dev_err(component->dev, "Unsupported DAI format 0x%08x.\n",
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cs4341->fmt);
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return -EINVAL;
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}
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return snd_soc_component_update_bits(component, CS4341_REG_MODE2,
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CS4341_MODE2_DIF, mode);
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}
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static int cs4341_mute(struct snd_soc_dai *dai, int mute, int direction)
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{
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struct snd_soc_component *component = dai->component;
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int ret;
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ret = snd_soc_component_update_bits(component, CS4341_REG_VOLA,
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CS4341_VOLX_MUTE,
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mute ? CS4341_VOLX_MUTE : 0);
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if (ret < 0)
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return ret;
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return snd_soc_component_update_bits(component, CS4341_REG_VOLB,
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CS4341_VOLX_MUTE,
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mute ? CS4341_VOLX_MUTE : 0);
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}
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static DECLARE_TLV_DB_SCALE(out_tlv, -9000, 100, 0);
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static const char * const deemph[] = {
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"None", "44.1k", "48k", "32k",
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};
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static const struct soc_enum deemph_enum =
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SOC_ENUM_SINGLE(CS4341_REG_MODE2, 2, 4, deemph);
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static const char * const srzc[] = {
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"Immediate", "Zero Cross", "Soft Ramp", "SR on ZC",
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};
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static const struct soc_enum srzc_enum =
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SOC_ENUM_SINGLE(CS4341_REG_MIX, 5, 4, srzc);
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static const struct snd_soc_dapm_widget cs4341_dapm_widgets[] = {
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SND_SOC_DAPM_DAC("HiFi DAC", NULL, SND_SOC_NOPM, 0, 0),
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SND_SOC_DAPM_OUTPUT("OutA"),
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SND_SOC_DAPM_OUTPUT("OutB"),
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};
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static const struct snd_soc_dapm_route cs4341_routes[] = {
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{ "OutA", NULL, "HiFi DAC" },
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{ "OutB", NULL, "HiFi DAC" },
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{ "DAC Playback", NULL, "OutA" },
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{ "DAC Playback", NULL, "OutB" },
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};
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static const struct snd_kcontrol_new cs4341_controls[] = {
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SOC_DOUBLE_R_TLV("Master Playback Volume",
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CS4341_REG_VOLA, CS4341_REG_VOLB, 0, 90, 1, out_tlv),
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SOC_ENUM("De-Emphasis Control", deemph_enum),
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SOC_ENUM("Soft Ramp Zero Cross Control", srzc_enum),
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SOC_SINGLE("Auto-Mute Switch", CS4341_REG_MODE2, 7, 1, 0),
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SOC_SINGLE("Popguard Transient Switch", CS4341_REG_MODE2, 1, 1, 0),
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};
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static const struct snd_soc_dai_ops cs4341_dai_ops = {
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.set_fmt = cs4341_set_fmt,
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.hw_params = cs4341_hw_params,
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.mute_stream = cs4341_mute,
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.no_capture_mute = 1,
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};
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static struct snd_soc_dai_driver cs4341_dai = {
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.name = "cs4341a-hifi",
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.playback = {
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.stream_name = "DAC Playback",
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.channels_min = 1,
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.channels_max = 2,
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.rates = SNDRV_PCM_RATE_8000_96000,
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.formats = SNDRV_PCM_FMTBIT_S16_LE |
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SNDRV_PCM_FMTBIT_S24_LE,
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},
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.ops = &cs4341_dai_ops,
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.symmetric_rate = 1,
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};
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static const struct snd_soc_component_driver soc_component_cs4341 = {
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.controls = cs4341_controls,
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.num_controls = ARRAY_SIZE(cs4341_controls),
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.dapm_widgets = cs4341_dapm_widgets,
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.num_dapm_widgets = ARRAY_SIZE(cs4341_dapm_widgets),
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.dapm_routes = cs4341_routes,
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.num_dapm_routes = ARRAY_SIZE(cs4341_routes),
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.idle_bias_on = 1,
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.use_pmdown_time = 1,
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.endianness = 1,
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};
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static const struct of_device_id __maybe_unused cs4341_dt_ids[] = {
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{ .compatible = "cirrus,cs4341a", },
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{ }
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};
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MODULE_DEVICE_TABLE(of, cs4341_dt_ids);
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static int cs4341_probe(struct device *dev)
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{
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struct cs4341_priv *cs4341 = dev_get_drvdata(dev);
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int i;
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for (i = 0; i < ARRAY_SIZE(cs4341_reg_defaults); i++)
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regmap_write(cs4341->regmap, cs4341_reg_defaults[i].reg,
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cs4341_reg_defaults[i].def);
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return devm_snd_soc_register_component(dev, &soc_component_cs4341,
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&cs4341_dai, 1);
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}
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#if IS_ENABLED(CONFIG_I2C)
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static int cs4341_i2c_probe(struct i2c_client *i2c)
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{
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struct cs4341_priv *cs4341;
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cs4341 = devm_kzalloc(&i2c->dev, sizeof(*cs4341), GFP_KERNEL);
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if (!cs4341)
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return -ENOMEM;
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i2c_set_clientdata(i2c, cs4341);
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cs4341->regcfg.reg_bits = 8;
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cs4341->regcfg.val_bits = 8;
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cs4341->regcfg.max_register = CS4341_REG_VOLB;
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cs4341->regcfg.cache_type = REGCACHE_FLAT;
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cs4341->regcfg.reg_defaults = cs4341_reg_defaults;
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cs4341->regcfg.num_reg_defaults = ARRAY_SIZE(cs4341_reg_defaults);
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cs4341->regmap = devm_regmap_init_i2c(i2c, &cs4341->regcfg);
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if (IS_ERR(cs4341->regmap))
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return PTR_ERR(cs4341->regmap);
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return cs4341_probe(&i2c->dev);
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}
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static const struct i2c_device_id cs4341_i2c_id[] = {
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{ "cs4341", 0 },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, cs4341_i2c_id);
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static struct i2c_driver cs4341_i2c_driver = {
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.driver = {
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.name = "cs4341-i2c",
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.of_match_table = of_match_ptr(cs4341_dt_ids),
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},
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.probe_new = cs4341_i2c_probe,
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.id_table = cs4341_i2c_id,
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};
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#endif
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#if defined(CONFIG_SPI_MASTER)
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static bool cs4341_reg_readable(struct device *dev, unsigned int reg)
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{
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return false;
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}
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static int cs4341_spi_probe(struct spi_device *spi)
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{
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struct cs4341_priv *cs4341;
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int ret;
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cs4341 = devm_kzalloc(&spi->dev, sizeof(*cs4341), GFP_KERNEL);
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if (!cs4341)
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return -ENOMEM;
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if (!spi->bits_per_word)
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spi->bits_per_word = 8;
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if (!spi->max_speed_hz)
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spi->max_speed_hz = 6000000;
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ret = spi_setup(spi);
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if (ret)
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return ret;
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spi_set_drvdata(spi, cs4341);
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cs4341->regcfg.reg_bits = 16;
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cs4341->regcfg.val_bits = 8;
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cs4341->regcfg.write_flag_mask = 0x20;
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cs4341->regcfg.max_register = CS4341_REG_VOLB;
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cs4341->regcfg.cache_type = REGCACHE_FLAT;
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cs4341->regcfg.readable_reg = cs4341_reg_readable;
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cs4341->regcfg.reg_defaults = cs4341_reg_defaults;
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cs4341->regcfg.num_reg_defaults = ARRAY_SIZE(cs4341_reg_defaults);
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cs4341->regmap = devm_regmap_init_spi(spi, &cs4341->regcfg);
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if (IS_ERR(cs4341->regmap))
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return PTR_ERR(cs4341->regmap);
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return cs4341_probe(&spi->dev);
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}
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static const struct spi_device_id cs4341_spi_ids[] = {
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{ "cs4341a" },
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{ }
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};
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MODULE_DEVICE_TABLE(spi, cs4341_spi_ids);
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static struct spi_driver cs4341_spi_driver = {
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.driver = {
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.name = "cs4341-spi",
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.of_match_table = of_match_ptr(cs4341_dt_ids),
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},
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.probe = cs4341_spi_probe,
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.id_table = cs4341_spi_ids,
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};
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#endif
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static int __init cs4341_init(void)
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{
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int ret = 0;
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#if IS_ENABLED(CONFIG_I2C)
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ret = i2c_add_driver(&cs4341_i2c_driver);
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if (ret)
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return ret;
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#endif
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#if defined(CONFIG_SPI_MASTER)
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ret = spi_register_driver(&cs4341_spi_driver);
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#endif
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return ret;
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}
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module_init(cs4341_init);
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static void __exit cs4341_exit(void)
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{
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#if IS_ENABLED(CONFIG_I2C)
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i2c_del_driver(&cs4341_i2c_driver);
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#endif
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#if defined(CONFIG_SPI_MASTER)
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spi_unregister_driver(&cs4341_spi_driver);
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#endif
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}
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module_exit(cs4341_exit);
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MODULE_AUTHOR("Alexander Shiyan <shc_work@mail.ru>");
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MODULE_DESCRIPTION("Cirrus Logic CS4341 ALSA SoC Codec Driver");
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MODULE_LICENSE("GPL");
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