diff options
Diffstat (limited to 'sound/soc/codecs/pcm179x.c')
| -rw-r--r-- | sound/soc/codecs/pcm179x.c | 271 |
1 files changed, 271 insertions, 0 deletions
diff --git a/sound/soc/codecs/pcm179x.c b/sound/soc/codecs/pcm179x.c new file mode 100644 index 000000000000..a56c7b767d90 --- /dev/null +++ b/sound/soc/codecs/pcm179x.c @@ -0,0 +1,271 @@ +/* + * PCM179X ASoC codec driver + * + * Copyright (c) Amarula Solutions B.V. 2013 + * + * Michael Trimarchi <michael@amarulasolutions.com> + * + * 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. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/kernel.h> +#include <linux/device.h> +#include <linux/spi/spi.h> + +#include <sound/core.h> +#include <sound/pcm.h> +#include <sound/pcm_params.h> +#include <sound/initval.h> +#include <sound/soc.h> +#include <sound/tlv.h> +#include <linux/of.h> +#include <linux/of_device.h> + +#include "pcm179x.h" + +#define PCM179X_DAC_VOL_LEFT 0x10 +#define PCM179X_DAC_VOL_RIGHT 0x11 +#define PCM179X_FMT_CONTROL 0x12 +#define PCM179X_MODE_CONTROL 0x13 +#define PCM179X_SOFT_MUTE PCM179X_FMT_CONTROL + +#define PCM179X_FMT_MASK 0x70 +#define PCM179X_FMT_SHIFT 4 +#define PCM179X_MUTE_MASK 0x01 +#define PCM179X_MUTE_SHIFT 0 +#define PCM179X_ATLD_ENABLE (1 << 7) + +static const struct reg_default pcm179x_reg_defaults[] = { + { 0x10, 0xff }, + { 0x11, 0xff }, + { 0x12, 0x50 }, + { 0x13, 0x00 }, + { 0x14, 0x00 }, + { 0x15, 0x01 }, + { 0x16, 0x00 }, + { 0x17, 0x00 }, +}; + +static bool pcm179x_accessible_reg(struct device *dev, unsigned int reg) +{ + return reg >= 0x10 && reg <= 0x17; +} + +static bool pcm179x_writeable_reg(struct device *dev, unsigned register reg) +{ + bool accessible; + + accessible = pcm179x_accessible_reg(dev, reg); + + return accessible && reg != 0x16 && reg != 0x17; +} + +struct pcm179x_private { + struct regmap *regmap; + unsigned int format; + unsigned int rate; +}; + +static int pcm179x_set_dai_fmt(struct snd_soc_dai *codec_dai, + unsigned int format) +{ + struct snd_soc_codec *codec = codec_dai->codec; + struct pcm179x_private *priv = snd_soc_codec_get_drvdata(codec); + + priv->format = format; + + return 0; +} + +static int pcm179x_digital_mute(struct snd_soc_dai *dai, int mute) +{ + struct snd_soc_codec *codec = dai->codec; + struct pcm179x_private *priv = snd_soc_codec_get_drvdata(codec); + int ret; + + ret = regmap_update_bits(priv->regmap, PCM179X_SOFT_MUTE, + PCM179X_MUTE_MASK, !!mute); + if (ret < 0) + return ret; + + return 0; +} + +static int pcm179x_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 pcm179x_private *priv = snd_soc_codec_get_drvdata(codec); + int val = 0, ret; + + priv->rate = params_rate(params); + + switch (priv->format & SND_SOC_DAIFMT_FORMAT_MASK) { + case SND_SOC_DAIFMT_RIGHT_J: + switch (params_width(params)) { + case 24: + case 32: + val = 2; + break; + case 16: + val = 0; + break; + default: + return -EINVAL; + } + break; + case SND_SOC_DAIFMT_I2S: + switch (params_width(params)) { + case 24: + case 32: + val = 5; + break; + case 16: + val = 4; + break; + default: + return -EINVAL; + } + break; + default: + dev_err(codec->dev, "Invalid DAI format\n"); + return -EINVAL; + } + + val = val << PCM179X_FMT_SHIFT | PCM179X_ATLD_ENABLE; + + ret = regmap_update_bits(priv->regmap, PCM179X_FMT_CONTROL, + PCM179X_FMT_MASK | PCM179X_ATLD_ENABLE, val); + if (ret < 0) + return ret; + + return 0; +} + +static const struct snd_soc_dai_ops pcm179x_dai_ops = { + .set_fmt = pcm179x_set_dai_fmt, + .hw_params = pcm179x_hw_params, + .digital_mute = pcm179x_digital_mute, +}; + +static const DECLARE_TLV_DB_SCALE(pcm179x_dac_tlv, -12000, 50, 1); + +static const struct snd_kcontrol_new pcm179x_controls[] = { + SOC_DOUBLE_R_RANGE_TLV("DAC Playback Volume", PCM179X_DAC_VOL_LEFT, + PCM179X_DAC_VOL_RIGHT, 0, 0xf, 0xff, 0, + pcm179x_dac_tlv), + SOC_SINGLE("DAC Invert Output Switch", PCM179X_MODE_CONTROL, 7, 1, 0), + SOC_SINGLE("DAC Rolloff Filter Switch", PCM179X_MODE_CONTROL, 1, 1, 0), +}; + +static const struct snd_soc_dapm_widget pcm179x_dapm_widgets[] = { +SND_SOC_DAPM_OUTPUT("IOUTL+"), +SND_SOC_DAPM_OUTPUT("IOUTL-"), +SND_SOC_DAPM_OUTPUT("IOUTR+"), +SND_SOC_DAPM_OUTPUT("IOUTR-"), +}; + +static const struct snd_soc_dapm_route pcm179x_dapm_routes[] = { + { "IOUTL+", NULL, "Playback" }, + { "IOUTL-", NULL, "Playback" }, + { "IOUTR+", NULL, "Playback" }, + { "IOUTR-", NULL, "Playback" }, +}; + +static struct snd_soc_dai_driver pcm179x_dai = { + .name = "pcm179x-hifi", + .playback = { + .stream_name = "Playback", + .channels_min = 2, + .channels_max = 2, + .rates = PCM1792A_RATES, + .formats = PCM1792A_FORMATS, }, + .ops = &pcm179x_dai_ops, +}; + +static const struct of_device_id pcm179x_of_match[] = { + { .compatible = "ti,pcm1792a", }, + { } +}; +MODULE_DEVICE_TABLE(of, pcm179x_of_match); + +static const struct regmap_config pcm179x_regmap = { + .reg_bits = 8, + .val_bits = 8, + .max_register = 23, + .reg_defaults = pcm179x_reg_defaults, + .num_reg_defaults = ARRAY_SIZE(pcm179x_reg_defaults), + .writeable_reg = pcm179x_writeable_reg, + .readable_reg = pcm179x_accessible_reg, +}; + +static struct snd_soc_codec_driver soc_codec_dev_pcm179x = { + .controls = pcm179x_controls, + .num_controls = ARRAY_SIZE(pcm179x_controls), + .dapm_widgets = pcm179x_dapm_widgets, + .num_dapm_widgets = ARRAY_SIZE(pcm179x_dapm_widgets), + .dapm_routes = pcm179x_dapm_routes, + .num_dapm_routes = ARRAY_SIZE(pcm179x_dapm_routes), +}; + +static int pcm179x_spi_probe(struct spi_device *spi) +{ + struct pcm179x_private *pcm179x; + int ret; + + pcm179x = devm_kzalloc(&spi->dev, sizeof(struct pcm179x_private), + GFP_KERNEL); + if (!pcm179x) + return -ENOMEM; + + spi_set_drvdata(spi, pcm179x); + + pcm179x->regmap = devm_regmap_init_spi(spi, &pcm179x_regmap); + if (IS_ERR(pcm179x->regmap)) { + ret = PTR_ERR(pcm179x->regmap); + dev_err(&spi->dev, "Failed to register regmap: %d\n", ret); + return ret; + } + + return snd_soc_register_codec(&spi->dev, + &soc_codec_dev_pcm179x, &pcm179x_dai, 1); +} + +static int pcm179x_spi_remove(struct spi_device *spi) +{ + snd_soc_unregister_codec(&spi->dev); + return 0; +} + +static const struct spi_device_id pcm179x_spi_ids[] = { + { "pcm179x", 0 }, + { }, +}; +MODULE_DEVICE_TABLE(spi, pcm179x_spi_ids); + +static struct spi_driver pcm179x_codec_driver = { + .driver = { + .name = "pcm179x", + .of_match_table = of_match_ptr(pcm179x_of_match), + }, + .id_table = pcm179x_spi_ids, + .probe = pcm179x_spi_probe, + .remove = pcm179x_spi_remove, +}; + +module_spi_driver(pcm179x_codec_driver); + +MODULE_DESCRIPTION("ASoC PCM179X driver"); +MODULE_AUTHOR("Michael Trimarchi <michael@amarulasolutions.com>"); +MODULE_LICENSE("GPL"); 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