/* * 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 <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 "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 int 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_component *component = codec_dai->component; struct pcm179x_private *priv = snd_soc_component_get_drvdata(component); priv->format = format; return 0; } static int pcm179x_digital_mute(struct snd_soc_dai *dai, int mute) { struct snd_soc_component *component = dai->component; struct pcm179x_private *priv = snd_soc_component_get_drvdata(component); 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_component *component = dai->component; struct pcm179x_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: 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(component->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 = SNDRV_PCM_RATE_CONTINUOUS, .rate_min = 10000, .rate_max = 200000, .formats = PCM1792A_FORMATS, }, .ops = &pcm179x_dai_ops, }; const struct regmap_config pcm179x_regmap_config = { .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, }; EXPORT_SYMBOL_GPL(pcm179x_regmap_config); static const struct snd_soc_component_driver soc_component_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), .idle_bias_on = 1, .use_pmdown_time = 1, .endianness = 1, .non_legacy_dai_naming = 1, }; int pcm179x_common_init(struct device *dev, struct regmap *regmap) { struct pcm179x_private *pcm179x; pcm179x = devm_kzalloc(dev, sizeof(struct pcm179x_private), GFP_KERNEL); if (!pcm179x) return -ENOMEM; pcm179x->regmap = regmap; dev_set_drvdata(dev, pcm179x); return devm_snd_soc_register_component(dev, &soc_component_dev_pcm179x, &pcm179x_dai, 1); } EXPORT_SYMBOL_GPL(pcm179x_common_init); MODULE_DESCRIPTION("ASoC PCM179X driver"); MODULE_AUTHOR("Michael Trimarchi <michael@amarulasolutions.com>"); MODULE_LICENSE("GPL");