| /* |
| * PCM1792A 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_device.h> |
| |
| #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 = 24, |
| .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 <michael@amarulasolutions.com>"); |
| MODULE_LICENSE("GPL"); |