--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+//
+// Lochnagar sound card driver
+//
+// Copyright (c) 2017-2019 Cirrus Logic, Inc. and
+// Cirrus Logic International Semiconductor Ltd.
+//
+// Author: Charles Keepax <ckeepax@opensource.cirrus.com>
+// Piotr Stankiewicz <piotrs@opensource.cirrus.com>
+
+#include <linux/clk.h>
+#include <linux/module.h>
+#include <sound/soc.h>
+
+#include <linux/mfd/lochnagar.h>
+#include <linux/mfd/lochnagar1_regs.h>
+#include <linux/mfd/lochnagar2_regs.h>
+
+struct lochnagar_sc_priv {
+ struct clk *mclk;
+};
+
+static const struct snd_soc_dapm_widget lochnagar_sc_widgets[] = {
+ SND_SOC_DAPM_LINE("Line Jack", NULL),
+ SND_SOC_DAPM_LINE("USB Audio", NULL),
+};
+
+static const struct snd_soc_dapm_route lochnagar_sc_routes[] = {
+ { "Line Jack", NULL, "AIF1 Playback" },
+ { "AIF1 Capture", NULL, "Line Jack" },
+
+ { "USB Audio", NULL, "USB1 Playback" },
+ { "USB Audio", NULL, "USB2 Playback" },
+ { "USB1 Capture", NULL, "USB Audio" },
+ { "USB2 Capture", NULL, "USB Audio" },
+};
+
+static const unsigned int lochnagar_sc_chan_vals[] = {
+ 4, 8,
+};
+
+static const struct snd_pcm_hw_constraint_list lochnagar_sc_chan_constraint = {
+ .count = ARRAY_SIZE(lochnagar_sc_chan_vals),
+ .list = lochnagar_sc_chan_vals,
+};
+
+static const unsigned int lochnagar_sc_rate_vals[] = {
+ 8000, 16000, 24000, 32000, 48000, 96000, 192000,
+ 22050, 44100, 88200, 176400,
+};
+
+static const struct snd_pcm_hw_constraint_list lochnagar_sc_rate_constraint = {
+ .count = ARRAY_SIZE(lochnagar_sc_rate_vals),
+ .list = lochnagar_sc_rate_vals,
+};
+
+static int lochnagar_sc_hw_rule_rate(struct snd_pcm_hw_params *params,
+ struct snd_pcm_hw_rule *rule)
+{
+ struct snd_interval range = {
+ .min = 8000,
+ .max = 24576000 / hw_param_interval(params, rule->deps[0])->max,
+ };
+
+ return snd_interval_refine(hw_param_interval(params, rule->var),
+ &range);
+}
+
+static int lochnagar_sc_startup(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_component *comp = dai->component;
+ struct lochnagar_sc_priv *priv = snd_soc_component_get_drvdata(comp);
+ int ret;
+
+ ret = snd_pcm_hw_constraint_list(substream->runtime, 0,
+ SNDRV_PCM_HW_PARAM_RATE,
+ &lochnagar_sc_rate_constraint);
+ if (ret)
+ return ret;
+
+ return snd_pcm_hw_rule_add(substream->runtime, 0,
+ SNDRV_PCM_HW_PARAM_RATE,
+ lochnagar_sc_hw_rule_rate, priv,
+ SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
+}
+
+static int lochnagar_sc_line_startup(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_component *comp = dai->component;
+ struct lochnagar_sc_priv *priv = snd_soc_component_get_drvdata(comp);
+ int ret;
+
+ ret = clk_prepare_enable(priv->mclk);
+ if (ret < 0) {
+ dev_err(dai->dev, "Failed to enable MCLK: %d\n", ret);
+ return ret;
+ }
+
+ ret = lochnagar_sc_startup(substream, dai);
+ if (ret)
+ return ret;
+
+ return snd_pcm_hw_constraint_list(substream->runtime, 0,
+ SNDRV_PCM_HW_PARAM_CHANNELS,
+ &lochnagar_sc_chan_constraint);
+}
+
+static void lochnagar_sc_line_shutdown(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_component *comp = dai->component;
+ struct lochnagar_sc_priv *priv = snd_soc_component_get_drvdata(comp);
+
+ clk_disable_unprepare(priv->mclk);
+}
+
+static int lochnagar_sc_check_fmt(struct snd_soc_dai *dai, unsigned int fmt,
+ unsigned int tar)
+{
+ tar |= SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF;
+
+ if ((fmt & ~SND_SOC_DAIFMT_CLOCK_MASK) != tar)
+ return -EINVAL;
+
+ return 0;
+}
+
+static int lochnagar_sc_set_line_fmt(struct snd_soc_dai *dai, unsigned int fmt)
+{
+ return lochnagar_sc_check_fmt(dai, fmt, SND_SOC_DAIFMT_CBS_CFS);
+}
+
+static int lochnagar_sc_set_usb_fmt(struct snd_soc_dai *dai, unsigned int fmt)
+{
+ return lochnagar_sc_check_fmt(dai, fmt, SND_SOC_DAIFMT_CBM_CFM);
+}
+
+static const struct snd_soc_dai_ops lochnagar_sc_line_ops = {
+ .startup = lochnagar_sc_line_startup,
+ .shutdown = lochnagar_sc_line_shutdown,
+ .set_fmt = lochnagar_sc_set_line_fmt,
+};
+
+static const struct snd_soc_dai_ops lochnagar_sc_usb_ops = {
+ .startup = lochnagar_sc_startup,
+ .set_fmt = lochnagar_sc_set_usb_fmt,
+};
+
+static struct snd_soc_dai_driver lochnagar_sc_dai[] = {
+ {
+ .name = "lochnagar-line",
+ .playback = {
+ .stream_name = "AIF1 Playback",
+ .channels_min = 4,
+ .channels_max = 8,
+ .rates = SNDRV_PCM_RATE_KNOT,
+ .formats = SNDRV_PCM_FMTBIT_S32_LE,
+ },
+ .capture = {
+ .stream_name = "AIF1 Capture",
+ .channels_min = 4,
+ .channels_max = 8,
+ .rates = SNDRV_PCM_RATE_KNOT,
+ .formats = SNDRV_PCM_FMTBIT_S32_LE,
+ },
+ .ops = &lochnagar_sc_line_ops,
+ .symmetric_rates = true,
+ .symmetric_samplebits = true,
+ },
+ {
+ .name = "lochnagar-usb1",
+ .playback = {
+ .stream_name = "USB1 Playback",
+ .channels_min = 1,
+ .channels_max = 8,
+ .rates = SNDRV_PCM_RATE_KNOT,
+ .formats = SNDRV_PCM_FMTBIT_S32_LE,
+ },
+ .capture = {
+ .stream_name = "USB1 Capture",
+ .channels_min = 1,
+ .channels_max = 8,
+ .rates = SNDRV_PCM_RATE_KNOT,
+ .formats = SNDRV_PCM_FMTBIT_S32_LE,
+ },
+ .ops = &lochnagar_sc_usb_ops,
+ .symmetric_rates = true,
+ .symmetric_samplebits = true,
+ },
+ {
+ .name = "lochnagar-usb2",
+ .playback = {
+ .stream_name = "USB2 Playback",
+ .channels_min = 1,
+ .channels_max = 8,
+ .rates = SNDRV_PCM_RATE_KNOT,
+ .formats = SNDRV_PCM_FMTBIT_S32_LE,
+ },
+ .capture = {
+ .stream_name = "USB2 Capture",
+ .channels_min = 1,
+ .channels_max = 8,
+ .rates = SNDRV_PCM_RATE_KNOT,
+ .formats = SNDRV_PCM_FMTBIT_S32_LE,
+ },
+ .ops = &lochnagar_sc_usb_ops,
+ .symmetric_rates = true,
+ .symmetric_samplebits = true,
+ },
+};
+
+static const struct snd_soc_component_driver lochnagar_sc_driver = {
+ .non_legacy_dai_naming = 1,
+
+ .dapm_widgets = lochnagar_sc_widgets,
+ .num_dapm_widgets = ARRAY_SIZE(lochnagar_sc_widgets),
+ .dapm_routes = lochnagar_sc_routes,
+ .num_dapm_routes = ARRAY_SIZE(lochnagar_sc_routes),
+};
+
+static int lochnagar_sc_probe(struct platform_device *pdev)
+{
+ struct lochnagar_sc_priv *priv;
+ int ret;
+
+ priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ priv->mclk = devm_clk_get(&pdev->dev, "mclk");
+ if (IS_ERR(priv->mclk)) {
+ ret = PTR_ERR(priv->mclk);
+ dev_err(&pdev->dev, "Failed to get MCLK: %d\n", ret);
+ return ret;
+ }
+
+ platform_set_drvdata(pdev, priv);
+
+ return devm_snd_soc_register_component(&pdev->dev,
+ &lochnagar_sc_driver,
+ lochnagar_sc_dai,
+ ARRAY_SIZE(lochnagar_sc_dai));
+}
+
+static const struct of_device_id lochnagar_of_match[] = {
+ { .compatible = "cirrus,lochnagar2-soundcard" },
+ {}
+};
+MODULE_DEVICE_TABLE(of, lochnagar_of_match);
+
+static struct platform_driver lochnagar_sc_codec_driver = {
+ .driver = {
+ .name = "lochnagar-soundcard",
+ .of_match_table = of_match_ptr(lochnagar_of_match),
+ },
+
+ .probe = lochnagar_sc_probe,
+};
+module_platform_driver(lochnagar_sc_codec_driver);
+
+MODULE_DESCRIPTION("ASoC Lochnagar Sound Card Driver");
+MODULE_AUTHOR("Piotr Stankiewicz <piotrs@opensource.cirrus.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:lochnagar-soundcard");
projects / openwrt / staging / blogic.git / commitdiff