--- /dev/null
+/*
+ * 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 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, },
+ .capture = {
+ .channels_min = 0,
+ .channels_max = 0,
+ },
+ .ops = &pcm1792a_dai_ops,
+};
+
+#ifdef CONFIG_OF
+static const struct of_device_id pcm1792a_of_match[] = {
+ { .compatible = "ti,pcm1792a", },
+ { }
+};
+MODULE_DEVICE_TABLE(of, pcm1792a_of_match);
+#endif
+
+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),
+};
+
+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 = 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");
projects / deliverable / linux.git / commitdiff
