diff options
Diffstat (limited to 'sound/soc/codecs/pcm1789.c')
| -rw-r--r-- | sound/soc/codecs/pcm1789.c | 273 |
1 files changed, 273 insertions, 0 deletions
diff --git a/sound/soc/codecs/pcm1789.c b/sound/soc/codecs/pcm1789.c new file mode 100644 index 000000000..8df6447c7 --- /dev/null +++ b/sound/soc/codecs/pcm1789.c @@ -0,0 +1,273 @@ +// SPDX-License-Identifier: GPL-2.0 +// Audio driver for PCM1789 +// Copyright (C) 2018 Bootlin +// Mylène Josserand <mylene.josserand@bootlin.com> + +#include <linux/gpio/consumer.h> +#include <linux/module.h> +#include <linux/workqueue.h> + +#include <sound/pcm_params.h> +#include <sound/soc.h> +#include <sound/tlv.h> + +#include "pcm1789.h" + +#define PCM1789_MUTE_CONTROL 0x10 +#define PCM1789_FMT_CONTROL 0x11 +#define PCM1789_SOFT_MUTE 0x14 +#define PCM1789_DAC_VOL_LEFT 0x18 +#define PCM1789_DAC_VOL_RIGHT 0x19 + +#define PCM1789_FMT_MASK 0x07 +#define PCM1789_MUTE_MASK 0x03 +#define PCM1789_MUTE_SRET 0x06 + +struct pcm1789_private { + struct regmap *regmap; + unsigned int format; + unsigned int rate; + struct gpio_desc *reset; + struct work_struct work; + struct device *dev; +}; + +static const struct reg_default pcm1789_reg_defaults[] = { + { PCM1789_FMT_CONTROL, 0x00 }, + { PCM1789_SOFT_MUTE, 0x00 }, + { PCM1789_DAC_VOL_LEFT, 0xff }, + { PCM1789_DAC_VOL_RIGHT, 0xff }, +}; + +static bool pcm1789_accessible_reg(struct device *dev, unsigned int reg) +{ + return reg >= PCM1789_MUTE_CONTROL && reg <= PCM1789_DAC_VOL_RIGHT; +} + +static bool pcm1789_writeable_reg(struct device *dev, unsigned int reg) +{ + return pcm1789_accessible_reg(dev, reg); +} + +static int pcm1789_set_dai_fmt(struct snd_soc_dai *codec_dai, + unsigned int format) +{ + struct snd_soc_component *component = codec_dai->component; + struct pcm1789_private *priv = snd_soc_component_get_drvdata(component); + + priv->format = format; + + return 0; +} + +static int pcm1789_digital_mute(struct snd_soc_dai *codec_dai, int mute) +{ + struct snd_soc_component *component = codec_dai->component; + struct pcm1789_private *priv = snd_soc_component_get_drvdata(component); + + return regmap_update_bits(priv->regmap, PCM1789_SOFT_MUTE, + PCM1789_MUTE_MASK, + mute ? 0 : PCM1789_MUTE_MASK); +} + +static int pcm1789_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params, + struct snd_soc_dai *codec_dai) +{ + struct snd_soc_component *component = codec_dai->component; + struct pcm1789_private *priv = snd_soc_component_get_drvdata(component); + 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: + val = 2; + break; + case 16: + val = 3; + break; + default: + return -EINVAL; + } + break; + case SND_SOC_DAIFMT_I2S: + switch (params_width(params)) { + case 16: + case 24: + case 32: + val = 0; + break; + default: + return -EINVAL; + } + break; + case SND_SOC_DAIFMT_LEFT_J: + switch (params_width(params)) { + case 16: + case 24: + case 32: + val = 1; + break; + default: + return -EINVAL; + } + break; + default: + dev_err(component->dev, "Invalid DAI format\n"); + return -EINVAL; + } + + ret = regmap_update_bits(priv->regmap, PCM1789_FMT_CONTROL, + PCM1789_FMT_MASK, val); + if (ret < 0) + return ret; + + return 0; +} + +static void pcm1789_work_queue(struct work_struct *work) +{ + struct pcm1789_private *priv = container_of(work, + struct pcm1789_private, + work); + + /* Perform a software reset to remove codec from desynchronized state */ + if (regmap_update_bits(priv->regmap, PCM1789_MUTE_CONTROL, + 0x3 << PCM1789_MUTE_SRET, 0) < 0) + dev_err(priv->dev, "Error while setting SRET"); +} + +static int pcm1789_trigger(struct snd_pcm_substream *substream, int cmd, + struct snd_soc_dai *dai) +{ + struct snd_soc_component *component = dai->component; + struct pcm1789_private *priv = snd_soc_component_get_drvdata(component); + int ret = 0; + + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + case SNDRV_PCM_TRIGGER_RESUME: + case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: + schedule_work(&priv->work); + break; + case SNDRV_PCM_TRIGGER_STOP: + case SNDRV_PCM_TRIGGER_SUSPEND: + case SNDRV_PCM_TRIGGER_PAUSE_PUSH: + break; + default: + ret = -EINVAL; + } + + return ret; +} + +static const struct snd_soc_dai_ops pcm1789_dai_ops = { + .set_fmt = pcm1789_set_dai_fmt, + .hw_params = pcm1789_hw_params, + .digital_mute = pcm1789_digital_mute, + .trigger = pcm1789_trigger, +}; + +static const DECLARE_TLV_DB_SCALE(pcm1789_dac_tlv, -12000, 50, 1); + +static const struct snd_kcontrol_new pcm1789_controls[] = { + SOC_DOUBLE_R_RANGE_TLV("DAC Playback Volume", PCM1789_DAC_VOL_LEFT, + PCM1789_DAC_VOL_RIGHT, 0, 0xf, 0xff, 0, + pcm1789_dac_tlv), +}; + +static const struct snd_soc_dapm_widget pcm1789_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 pcm1789_dapm_routes[] = { + { "IOUTL+", NULL, "Playback" }, + { "IOUTL-", NULL, "Playback" }, + { "IOUTR+", NULL, "Playback" }, + { "IOUTR-", NULL, "Playback" }, +}; + +static struct snd_soc_dai_driver pcm1789_dai = { + .name = "pcm1789-hifi", + .playback = { + .stream_name = "Playback", + .channels_min = 2, + .channels_max = 2, + .rates = SNDRV_PCM_RATE_CONTINUOUS, + .rate_min = 10000, + .rate_max = 200000, + .formats = PCM1789_FORMATS, + }, + .ops = &pcm1789_dai_ops, +}; + +const struct regmap_config pcm1789_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + .max_register = PCM1789_DAC_VOL_RIGHT, + .reg_defaults = pcm1789_reg_defaults, + .num_reg_defaults = ARRAY_SIZE(pcm1789_reg_defaults), + .writeable_reg = pcm1789_writeable_reg, + .readable_reg = pcm1789_accessible_reg, +}; +EXPORT_SYMBOL_GPL(pcm1789_regmap_config); + +static const struct snd_soc_component_driver soc_component_dev_pcm1789 = { + .controls = pcm1789_controls, + .num_controls = ARRAY_SIZE(pcm1789_controls), + .dapm_widgets = pcm1789_dapm_widgets, + .num_dapm_widgets = ARRAY_SIZE(pcm1789_dapm_widgets), + .dapm_routes = pcm1789_dapm_routes, + .num_dapm_routes = ARRAY_SIZE(pcm1789_dapm_routes), + .idle_bias_on = 1, + .use_pmdown_time = 1, + .endianness = 1, + .non_legacy_dai_naming = 1, +}; + +int pcm1789_common_init(struct device *dev, struct regmap *regmap) +{ + struct pcm1789_private *pcm1789; + + pcm1789 = devm_kzalloc(dev, sizeof(struct pcm1789_private), + GFP_KERNEL); + if (!pcm1789) + return -ENOMEM; + + pcm1789->regmap = regmap; + pcm1789->dev = dev; + dev_set_drvdata(dev, pcm1789); + + pcm1789->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH); + if (IS_ERR(pcm1789->reset)) + return PTR_ERR(pcm1789->reset); + + gpiod_set_value_cansleep(pcm1789->reset, 0); + msleep(300); + + INIT_WORK(&pcm1789->work, pcm1789_work_queue); + + return devm_snd_soc_register_component(dev, &soc_component_dev_pcm1789, + &pcm1789_dai, 1); +} +EXPORT_SYMBOL_GPL(pcm1789_common_init); + +int pcm1789_common_exit(struct device *dev) +{ + struct pcm1789_private *priv = dev_get_drvdata(dev); + + flush_work(&priv->work); + + return 0; +} +EXPORT_SYMBOL_GPL(pcm1789_common_exit); + +MODULE_DESCRIPTION("ASoC PCM1789 driver"); +MODULE_AUTHOR("Mylène Josserand <mylene.josserand@free-electrons.com>"); +MODULE_LICENSE("GPL"); |