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