Initial commit of the Cirrus Logic CS4341. This is a very simple, playback only, stereo DAC.

Signed-off-by: Alexander Shiyan shc_work@mail.ru --- sound/soc/codecs/Kconfig | 7 ++ sound/soc/codecs/Makefile | 1 + sound/soc/codecs/cs4341.c | 281 ++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 289 insertions(+) create mode 100644 sound/soc/codecs/cs4341.c

diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig index 1cd6ab3..9853e79 100644 --- a/sound/soc/codecs/Kconfig +++ b/sound/soc/codecs/Kconfig @@ -458,6 +458,13 @@ config SND_SOC_CS42XX8_I2C select SND_SOC_CS42XX8 select REGMAP_I2C

+config SND_SOC_CS4341 + tristate "Cirrus Logic CS4341 CODEC" + depends on SPI_MASTER + select REGMAP_SPI + help + Enable support for Cirrus Logic (Crystal) CS4341 CODEC. + # Cirrus Logic CS4349 HiFi DAC config SND_SOC_CS4349 tristate "Cirrus Logic CS4349 CODEC" diff --git a/sound/soc/codecs/Makefile b/sound/soc/codecs/Makefile index 58036af..f699105 100644 --- a/sound/soc/codecs/Makefile +++ b/sound/soc/codecs/Makefile @@ -50,6 +50,7 @@ snd-soc-cs4271-i2c-objs := cs4271-i2c.o snd-soc-cs4271-spi-objs := cs4271-spi.o snd-soc-cs42xx8-objs := cs42xx8.o snd-soc-cs42xx8-i2c-objs := cs42xx8-i2c.o +snd-soc-cs4341-objs := cs4341.o snd-soc-cs4349-objs := cs4349.o snd-soc-cs47l24-objs := cs47l24.o snd-soc-cs53l30-objs := cs53l30.o diff --git a/sound/soc/codecs/cs4341.c b/sound/soc/codecs/cs4341.c new file mode 100644 index 0000000..74907ad --- /dev/null +++ b/sound/soc/codecs/cs4341.c @@ -0,0 +1,281 @@ +/* + * Cirrus Logic CS4341A ALSA SoC Codec Driver + * + * Author: Alexander Shiyan shc_work@mail.ru, 2016 + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ + +#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> + +/* + * CS4341 registers: + * High byte - SPI chip address (0x20) + * Low byte - Memory Address Pointer + */ +#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 bool cs4341_reg_readable(struct device *dev, unsigned int reg) +{ + return false; +} + +static int cs4341_set_fmt(struct snd_soc_dai *dai, unsigned int format) +{ + struct snd_soc_codec *codec = dai->codec; + struct cs4341_priv *cs4341 = snd_soc_codec_get_drvdata(codec); + + switch (format & SND_SOC_DAIFMT_MASTER_MASK) { + case SND_SOC_DAIFMT_CBS_CFS: + break; + default: + goto fmt_err; + } + + switch (format & SND_SOC_DAIFMT_INV_MASK) { + case SND_SOC_DAIFMT_NB_NF: + break; + default: + goto fmt_err; + } + + 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; + return 0; + default: + break; + } + +fmt_err: + dev_err(codec->dev, "Invalid DAI format 0x%08x\n", format); + + return -EINVAL; +} + +static int cs4341_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params, + struct snd_soc_dai *dai) +{ + struct snd_soc_codec *codec = dai->codec; + struct cs4341_priv *cs4341 = snd_soc_codec_get_drvdata(codec); + int bits24 = 0; + + switch (params_format(params)) { + case SNDRV_PCM_FORMAT_S24_LE: + bits24 = 1; + break; + case SNDRV_PCM_FORMAT_S16_LE: + break; + default: + dev_err(codec->dev, "Unsupported PCM format\n"); + return -EINVAL; + } + + switch (cs4341->fmt) { + case SND_SOC_DAIFMT_I2S: + snd_soc_update_bits(codec, CS4341_REG_MODE2, CS4341_MODE2_DIF, + bits24 ? CS4341_MODE2_DIF_I2S_24 : + CS4341_MODE2_DIF_I2S_16); + break; + case SND_SOC_DAIFMT_LEFT_J: + snd_soc_update_bits(codec, CS4341_REG_MODE2, CS4341_MODE2_DIF, + CS4341_MODE2_DIF_LJ_24); + break; + case SND_SOC_DAIFMT_RIGHT_J: + snd_soc_update_bits(codec, CS4341_REG_MODE2, CS4341_MODE2_DIF, + bits24 ? CS4341_MODE2_DIF_RJ_24 : + CS4341_MODE2_DIF_RJ_16); + break; + default: + dev_err(codec->dev, "Unsupported DAI format\n"); + return -EINVAL; + } + + return 0; +} + +static int cs4341_digital_mute(struct snd_soc_dai *dai, int mute) +{ + struct snd_soc_codec *codec = dai->codec; + int ret; + + ret = snd_soc_update_bits(codec, CS4341_REG_VOLA, CS4341_VOLX_MUTE, + mute ? CS4341_VOLX_MUTE : 0); + if (ret < 0) + return ret; + + return snd_soc_update_bits(codec, CS4341_REG_VOLB, CS4341_VOLX_MUTE, + mute ? CS4341_VOLX_MUTE : 0); +} + +static DECLARE_TLV_DB_SCALE(out_tlv, -9000, 100, 0); + +static const char *deemph[] = { + "Disabled", "44.1 kHz", "48 kHz", "32 kHz", +}; + +static const struct soc_enum deemph_enum = + SOC_ENUM_SINGLE(CS4341_REG_MODE2, 2, 4, deemph); + +static const char *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 Control", 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, + .digital_mute = cs4341_digital_mute, +}; + +static struct snd_soc_dai_driver cs4341_dai = { + .name = "cs4341a-hifi", + .symmetric_rates = 1, + .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, +}; + +static struct snd_soc_codec_driver soc_codec_cs4341 = { + .dapm_widgets = cs4341_dapm_widgets, + .num_dapm_widgets = ARRAY_SIZE(cs4341_dapm_widgets), + .dapm_routes = cs4341_routes, + .num_dapm_routes = ARRAY_SIZE(cs4341_routes), + .controls = cs4341_controls, + .num_controls = ARRAY_SIZE(cs4341_controls), +}; + +static int cs4341_spi_probe(struct spi_device *spi) +{ + struct cs4341_priv *cs4341; + int i, ret; + + cs4341 = devm_kzalloc(&spi->dev, sizeof(*cs4341), GFP_KERNEL); + if (!cs4341) + return -ENOMEM; + + spi->bits_per_word = spi->bits_per_word ? : 8; + spi->max_speed_hz = spi->max_speed_hz ? : 6000000; + ret = spi_setup(spi); + if (ret) + return ret; + + 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); + + spi_set_drvdata(spi, cs4341); + + 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 snd_soc_register_codec(&spi->dev, &soc_codec_cs4341, &cs4341_dai, 1); +} + +static int cs4341_spi_remove(struct spi_device *spi) +{ + snd_soc_unregister_codec(&spi->dev); + + return 0; +} + +static const struct of_device_id __maybe_unused cs4341_dt_ids[] = { + { .compatible = "cirrus,cs4341a", }, + { } +}; +MODULE_DEVICE_TABLE(of, cs4341_dt_ids); + +static struct spi_driver cs4341_spi_driver = { + .driver = { + .name = "cs4341", + .of_match_table = of_match_ptr(cs4341_dt_ids), + }, + .probe = cs4341_spi_probe, + .remove = cs4341_spi_remove, +}; +module_spi_driver(cs4341_spi_driver); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Alexander Shiyan shc_work@mail.ru"); +MODULE_DESCRIPTION("Cirrus Logic CS4341 ALSA SoC Codec Driver");