/* * PCM1792A ASoC codec driver * * Copyright (c) Amarula Solutions B.V. 2013 * * Michael Trimarchi * * 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 #include #include #include #include #include #include #include #include #include #include #include #include "pcm1792a.h" #define PCM1792A_DAC_VOL_LEFT 0x10 #define PCM1792A_DAC_VOL_RIGHT 0x11 #define PCM1792A_FMT_CONTROL 0x12 #define PCM1792A_SOFT_MUTE PCM1792A_FMT_CONTROL #define PCM1792A_FMT_MASK 0x70 #define PCM1792A_FMT_SHIFT 4 #define PCM1792A_MUTE_MASK 0x01 #define PCM1792A_MUTE_SHIFT 0 #define PCM1792A_ATLD_ENABLE (1 << 7) static const struct reg_default pcm1792a_reg_defaults[] = { { 0x10, 0xff }, { 0x11, 0xff }, { 0x12, 0x50 }, { 0x13, 0x00 }, { 0x14, 0x00 }, { 0x15, 0x01 }, { 0x16, 0x00 }, { 0x17, 0x00 }, }; static bool pcm1792a_accessible_reg(struct device *dev, unsigned int reg) { return reg >= 0x10 && reg <= 0x17; } static bool pcm1792a_writeable_reg(struct device *dev, unsigned register reg) { bool accessible; accessible = pcm1792a_accessible_reg(dev, reg); return accessible && reg != 0x16 && reg != 0x17; } struct pcm1792a_private { struct regmap *regmap; unsigned int format; unsigned int rate; }; static int pcm1792a_set_dai_fmt(struct snd_soc_dai *codec_dai, unsigned int format) { struct snd_soc_codec *codec = codec_dai->codec; struct pcm1792a_private *priv = snd_soc_codec_get_drvdata(codec); priv->format = format; return 0; } static int pcm1792a_digital_mute(struct snd_soc_dai *dai, int mute) { struct snd_soc_codec *codec = dai->codec; struct pcm1792a_private *priv = snd_soc_codec_get_drvdata(codec); int ret; ret = regmap_update_bits(priv->regmap, PCM1792A_SOFT_MUTE, PCM1792A_MUTE_MASK, !!mute); if (ret < 0) return ret; return 0; } static int pcm1792a_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 pcm1792a_private *priv = snd_soc_codec_get_drvdata(codec); int val = 0, ret; int pcm_format = params_format(params); priv->rate = params_rate(params); switch (priv->format & SND_SOC_DAIFMT_FORMAT_MASK) { case SND_SOC_DAIFMT_RIGHT_J: if (pcm_format == SNDRV_PCM_FORMAT_S24_LE || pcm_format == SNDRV_PCM_FORMAT_S32_LE) val = 0x02; else if (pcm_format == SNDRV_PCM_FORMAT_S16_LE) val = 0x00; break; case SND_SOC_DAIFMT_I2S: if (pcm_format == SNDRV_PCM_FORMAT_S24_LE || pcm_format == SNDRV_PCM_FORMAT_S32_LE) val = 0x05; else if (pcm_format == SNDRV_PCM_FORMAT_S16_LE) val = 0x04; break; default: dev_err(codec->dev, "Invalid DAI format\n"); return -EINVAL; } val = val << PCM1792A_FMT_SHIFT | PCM1792A_ATLD_ENABLE; ret = regmap_update_bits(priv->regmap, PCM1792A_FMT_CONTROL, PCM1792A_FMT_MASK | PCM1792A_ATLD_ENABLE, val); if (ret < 0) return ret; return 0; } static const struct snd_soc_dai_ops pcm1792a_dai_ops = { .set_fmt = pcm1792a_set_dai_fmt, .hw_params = pcm1792a_hw_params, .digital_mute = pcm1792a_digital_mute, }; static const DECLARE_TLV_DB_SCALE(pcm1792a_dac_tlv, -12000, 50, 1); static const struct snd_kcontrol_new pcm1792a_controls[] = { SOC_DOUBLE_R_RANGE_TLV("DAC Playback Volume", PCM1792A_DAC_VOL_LEFT, PCM1792A_DAC_VOL_RIGHT, 0, 0xf, 0xff, 0, pcm1792a_dac_tlv), }; static const struct snd_soc_dapm_widget pcm1792a_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 pcm1792a_dapm_routes[] = { { "IOUTL+", NULL, "Playback" }, { "IOUTL-", NULL, "Playback" }, { "IOUTR+", NULL, "Playback" }, { "IOUTR-", NULL, "Playback" }, }; static struct snd_soc_dai_driver pcm1792a_dai = { .name = "pcm1792a-hifi", .playback = { .stream_name = "Playback", .channels_min = 2, .channels_max = 2, .rates = PCM1792A_RATES, .formats = PCM1792A_FORMATS, }, .ops = &pcm1792a_dai_ops, }; static const struct of_device_id pcm1792a_of_match[] = { { .compatible = "ti,pcm1792a", }, { } }; MODULE_DEVICE_TABLE(of, pcm1792a_of_match); static const struct regmap_config pcm1792a_regmap = { .reg_bits = 8, .val_bits = 8, .max_register = 23, .reg_defaults = pcm1792a_reg_defaults, .num_reg_defaults = ARRAY_SIZE(pcm1792a_reg_defaults), .writeable_reg = pcm1792a_writeable_reg, .readable_reg = pcm1792a_accessible_reg, }; static struct snd_soc_codec_driver soc_codec_dev_pcm1792a = { .controls = pcm1792a_controls, .num_controls = ARRAY_SIZE(pcm1792a_controls), .dapm_widgets = pcm1792a_dapm_widgets, .num_dapm_widgets = ARRAY_SIZE(pcm1792a_dapm_widgets), .dapm_routes = pcm1792a_dapm_routes, .num_dapm_routes = ARRAY_SIZE(pcm1792a_dapm_routes), }; static int pcm1792a_spi_probe(struct spi_device *spi) { struct pcm1792a_private *pcm1792a; int ret; pcm1792a = devm_kzalloc(&spi->dev, sizeof(struct pcm1792a_private), GFP_KERNEL); if (!pcm1792a) return -ENOMEM; spi_set_drvdata(spi, pcm1792a); pcm1792a->regmap = devm_regmap_init_spi(spi, &pcm1792a_regmap); if (IS_ERR(pcm1792a->regmap)) { ret = PTR_ERR(pcm1792a->regmap); dev_err(&spi->dev, "Failed to register regmap: %d\n", ret); return ret; } return snd_soc_register_codec(&spi->dev, &soc_codec_dev_pcm1792a, &pcm1792a_dai, 1); } static int pcm1792a_spi_remove(struct spi_device *spi) { snd_soc_unregister_codec(&spi->dev); return 0; } static const struct spi_device_id pcm1792a_spi_ids[] = { { "pcm1792a", 0 }, { }, }; MODULE_DEVICE_TABLE(spi, pcm1792a_spi_ids); static struct spi_driver pcm1792a_codec_driver = { .driver = { .name = "pcm1792a", .owner = THIS_MODULE, .of_match_table = of_match_ptr(pcm1792a_of_match), }, .id_table = pcm1792a_spi_ids, .probe = pcm1792a_spi_probe, .remove = pcm1792a_spi_remove, }; module_spi_driver(pcm1792a_codec_driver); MODULE_DESCRIPTION("ASoC PCM1792A driver"); MODULE_AUTHOR("Michael Trimarchi "); MODULE_LICENSE("GPL");