--- /dev/null
+// SPDX-License-Identifier: GPL-2.0-only
+//
+// uda1334.c -- UDA1334 ALSA SoC Audio driver
+//
+// Based on WM8523 ALSA SoC Audio driver written by Mark Brown
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <linux/gpio/consumer.h>
+#include <linux/of_device.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/initval.h>
+
+#define UDA1334_NUM_RATES 6
+
+/* codec private data */
+struct uda1334_priv {
+ struct gpio_desc *mute;
+ struct gpio_desc *deemph;
+ unsigned int sysclk;
+ unsigned int rate_constraint_list[UDA1334_NUM_RATES];
+ struct snd_pcm_hw_constraint_list rate_constraint;
+};
+
+static const struct snd_soc_dapm_widget uda1334_dapm_widgets[] = {
+SND_SOC_DAPM_DAC("DAC", "Playback", SND_SOC_NOPM, 0, 0),
+SND_SOC_DAPM_OUTPUT("LINEVOUTL"),
+SND_SOC_DAPM_OUTPUT("LINEVOUTR"),
+};
+
+static const struct snd_soc_dapm_route uda1334_dapm_routes[] = {
+ { "LINEVOUTL", NULL, "DAC" },
+ { "LINEVOUTR", NULL, "DAC" },
+};
+
+static int uda1334_put_deemph(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
+ struct uda1334_priv *uda1334 = snd_soc_component_get_drvdata(component);
+ int deemph = ucontrol->value.integer.value[0];
+
+ if (deemph > 1)
+ return -EINVAL;
+
+ gpiod_set_value_cansleep(uda1334->deemph, deemph);
+
+ return 0;
+};
+
+static int uda1334_get_deemph(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
+ struct uda1334_priv *uda1334 = snd_soc_component_get_drvdata(component);
+ int ret;
+
+ ret = gpiod_get_value_cansleep(uda1334->deemph);
+ if (ret < 0)
+ return -EINVAL;
+
+ ucontrol->value.integer.value[0] = ret;
+
+ return 0;
+};
+
+static const struct snd_kcontrol_new uda1334_snd_controls[] = {
+ SOC_SINGLE_BOOL_EXT("Playback Deemphasis Switch", 0,
+ uda1334_get_deemph, uda1334_put_deemph),
+};
+
+static const struct {
+ int value;
+ int ratio;
+} lrclk_ratios[UDA1334_NUM_RATES] = {
+ { 1, 128 },
+ { 2, 192 },
+ { 3, 256 },
+ { 4, 384 },
+ { 5, 512 },
+ { 6, 768 },
+};
+
+static int uda1334_startup(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_component *component = dai->component;
+ struct uda1334_priv *uda1334 = snd_soc_component_get_drvdata(component);
+
+ /*
+ * The set of sample rates that can be supported depends on the
+ * MCLK supplied to the CODEC - enforce this.
+ */
+ if (!uda1334->sysclk) {
+ dev_err(component->dev,
+ "No MCLK configured, call set_sysclk() on init\n");
+ return -EINVAL;
+ }
+
+ snd_pcm_hw_constraint_list(substream->runtime, 0,
+ SNDRV_PCM_HW_PARAM_RATE,
+ &uda1334->rate_constraint);
+
+ gpiod_set_value_cansleep(uda1334->mute, 1);
+
+ return 0;
+}
+
+static void uda1334_shutdown(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_component *component = dai->component;
+ struct uda1334_priv *uda1334 = snd_soc_component_get_drvdata(component);
+
+ gpiod_set_value_cansleep(uda1334->mute, 0);
+}
+
+static int uda1334_set_dai_sysclk(struct snd_soc_dai *codec_dai,
+ int clk_id, unsigned int freq, int dir)
+{
+ struct snd_soc_component *component = codec_dai->component;
+ struct uda1334_priv *uda1334 = snd_soc_component_get_drvdata(component);
+ unsigned int val;
+ int i, j = 0;
+
+ uda1334->sysclk = freq;
+
+ uda1334->rate_constraint.count = 0;
+ for (i = 0; i < ARRAY_SIZE(lrclk_ratios); i++) {
+ val = freq / lrclk_ratios[i].ratio;
+ /*
+ * Check that it's a standard rate since core can't
+ * cope with others and having the odd rates confuses
+ * constraint matching.
+ */
+
+ switch (val) {
+ case 8000:
+ case 32000:
+ case 44100:
+ case 48000:
+ case 64000:
+ case 88200:
+ case 96000:
+ dev_dbg(component->dev, "Supported sample rate: %dHz\n",
+ val);
+ uda1334->rate_constraint_list[j++] = val;
+ uda1334->rate_constraint.count++;
+ break;
+ default:
+ dev_dbg(component->dev, "Skipping sample rate: %dHz\n",
+ val);
+ }
+ }
+
+ /* Need at least one supported rate... */
+ if (uda1334->rate_constraint.count == 0)
+ return -EINVAL;
+
+ return 0;
+}
+
+static int uda1334_set_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt)
+{
+ fmt &= (SND_SOC_DAIFMT_FORMAT_MASK | SND_SOC_DAIFMT_INV_MASK |
+ SND_SOC_DAIFMT_MASTER_MASK);
+
+ if (fmt != (SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
+ SND_SOC_DAIFMT_CBS_CFS)) {
+ dev_err(codec_dai->dev, "Invalid DAI format\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int uda1334_mute_stream(struct snd_soc_dai *dai, int mute, int stream)
+{
+ struct uda1334_priv *uda1334 = snd_soc_component_get_drvdata(dai->component);
+
+ if (uda1334->mute)
+ gpiod_set_value_cansleep(uda1334->mute, mute);
+
+ return 0;
+}
+
+#define UDA1334_RATES SNDRV_PCM_RATE_8000_96000
+
+#define UDA1334_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE)
+
+static const struct snd_soc_dai_ops uda1334_dai_ops = {
+ .startup = uda1334_startup,
+ .shutdown = uda1334_shutdown,
+ .set_sysclk = uda1334_set_dai_sysclk,
+ .set_fmt = uda1334_set_fmt,
+ .mute_stream = uda1334_mute_stream,
+};
+
+static struct snd_soc_dai_driver uda1334_dai = {
+ .name = "uda1334-hifi",
+ .playback = {
+ .stream_name = "Playback",
+ .channels_min = 2,
+ .channels_max = 2,
+ .rates = UDA1334_RATES,
+ .formats = UDA1334_FORMATS,
+ },
+ .ops = &uda1334_dai_ops,
+};
+
+static int uda1334_probe(struct snd_soc_component *component)
+{
+ struct uda1334_priv *uda1334 = snd_soc_component_get_drvdata(component);
+
+ uda1334->rate_constraint.list = &uda1334->rate_constraint_list[0];
+ uda1334->rate_constraint.count =
+ ARRAY_SIZE(uda1334->rate_constraint_list);
+
+ return 0;
+}
+
+static const struct snd_soc_component_driver soc_component_dev_uda1334 = {
+ .probe = uda1334_probe,
+ .controls = uda1334_snd_controls,
+ .num_controls = ARRAY_SIZE(uda1334_snd_controls),
+ .dapm_widgets = uda1334_dapm_widgets,
+ .num_dapm_widgets = ARRAY_SIZE(uda1334_dapm_widgets),
+ .dapm_routes = uda1334_dapm_routes,
+ .num_dapm_routes = ARRAY_SIZE(uda1334_dapm_routes),
+ .idle_bias_on = 1,
+ .use_pmdown_time = 1,
+ .endianness = 1,
+ .non_legacy_dai_naming = 1,
+};
+
+static const struct of_device_id uda1334_of_match[] = {
+ { .compatible = "nxp,uda1334" },
+ { /* sentinel*/ }
+};
+MODULE_DEVICE_TABLE(of, uda1334_of_match);
+
+static int uda1334_codec_probe(struct platform_device *pdev)
+{
+ struct uda1334_priv *uda1334;
+ int ret;
+
+ uda1334 = devm_kzalloc(&pdev->dev, sizeof(struct uda1334_priv),
+ GFP_KERNEL);
+ if (!uda1334)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, uda1334);
+
+ uda1334->mute = devm_gpiod_get(&pdev->dev, "nxp,mute", GPIOD_OUT_LOW);
+ if (IS_ERR(uda1334->mute)) {
+ ret = PTR_ERR(uda1334->mute);
+ dev_err(&pdev->dev, "Failed to get mute line: %d\n", ret);
+ return ret;
+ }
+
+ uda1334->deemph = devm_gpiod_get(&pdev->dev, "nxp,deemph", GPIOD_OUT_LOW);
+ if (IS_ERR(uda1334->deemph)) {
+ ret = PTR_ERR(uda1334->deemph);
+ dev_err(&pdev->dev, "Failed to get deemph line: %d\n", ret);
+ return ret;
+ }
+
+ ret = devm_snd_soc_register_component(&pdev->dev,
+ &soc_component_dev_uda1334,
+ &uda1334_dai, 1);
+ if (ret < 0)
+ dev_err(&pdev->dev, "Failed to register component: %d\n", ret);
+
+ return ret;
+}
+
+static struct platform_driver uda1334_codec_driver = {
+ .probe = uda1334_codec_probe,
+ .driver = {
+ .name = "uda1334-codec",
+ .of_match_table = uda1334_of_match,
+ },
+};
+module_platform_driver(uda1334_codec_driver);
+
+MODULE_DESCRIPTION("ASoC UDA1334 driver");
+MODULE_AUTHOR("Andra Danciu <andradanciu1997@gmail.com>");
+MODULE_ALIAS("platform:uda1334-codec");
+MODULE_LICENSE("GPL v2");
projects / platform / kernel / linux-rpi.git / commitdiff