--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+// Audio driver for PCM1789 I2C
+// Copyright (C) 2018 Bootlin
+// Mylène Josserand <mylene.josserand@bootlin.com>
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/regmap.h>
+
+#include "pcm1789.h"
+
+static int pcm1789_i2c_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct regmap *regmap;
+ int ret;
+
+ regmap = devm_regmap_init_i2c(client, &pcm1789_regmap_config);
+ if (IS_ERR(regmap)) {
+ ret = PTR_ERR(regmap);
+ dev_err(&client->dev, "Failed to allocate regmap: %d\n", ret);
+ return ret;
+ }
+
+ return pcm1789_common_init(&client->dev, regmap);
+}
+
+static int pcm1789_i2c_remove(struct i2c_client *client)
+{
+ return pcm1789_common_exit(&client->dev);
+}
+
+static const struct of_device_id pcm1789_of_match[] = {
+ { .compatible = "ti,pcm1789", },
+ { }
+};
+MODULE_DEVICE_TABLE(of, pcm1789_of_match);
+
+static const struct i2c_device_id pcm1789_i2c_ids[] = {
+ { "pcm1789", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, pcm1789_i2c_ids);
+
+static struct i2c_driver pcm1789_i2c_driver = {
+ .driver = {
+ .name = "pcm1789",
+ .of_match_table = of_match_ptr(pcm1789_of_match),
+ },
+ .id_table = pcm1789_i2c_ids,
+ .probe = pcm1789_i2c_probe,
+ .remove = pcm1789_i2c_remove,
+};
+
+module_i2c_driver(pcm1789_i2c_driver);
+
+MODULE_DESCRIPTION("ASoC PCM1789 I2C driver");
+MODULE_AUTHOR("Mylène Josserand <mylene.josserand@bootlin.com>");
+MODULE_LICENSE("GPL");
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+// Audio driver for PCM1789
+// Copyright (C) 2018 Bootlin
+// Mylène Josserand <mylene.josserand@bootlin.com>
+
+#include <linux/gpio.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);
+
+ if (&priv->work)
+ 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");
projects / linux.git / commitdiff