1 files changed, 339 insertions, 0 deletions

diff --git a/sound/soc/fsl/imx-audmix.c b/sound/soc/fsl/imx-audmix.c
new file mode 100644
index 000000000000..dac5d4ddacd6
--- /dev/null
+++ b/sound/soc/fsl/imx-audmix.c
@@ -0,0 +1,339 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright 2017 NXP
+ *
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * https://www.opensource.org/licenses/gpl-license.html
+ * https://www.gnu.org/copyleft/gpl.html
+ */
+
+#include <linux/module.h>
+#include <linux/of_platform.h>
+#include <linux/clk.h>
+#include <sound/soc.h>
+#include <sound/soc-dapm.h>
+#include "fsl_sai.h"
+#include "fsl_audmix.h"
+
+struct imx_audmix {
+	struct platform_device *pdev;
+	struct snd_soc_card card;
+	struct platform_device *audmix_pdev;
+	struct platform_device *out_pdev;
+	int num_dai;
+	struct snd_soc_dai_link *dai;
+	int num_dai_conf;
+	struct snd_soc_codec_conf *dai_conf;
+	int num_dapm_routes;
+	struct snd_soc_dapm_route *dapm_routes;
+};
+
+static int imx_audmix_fe_startup(struct snd_pcm_substream *substream)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	int ret;
+
+	ret = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
+					   1, 8);
+	if (ret < 0)
+		return ret;
+
+	return snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT,
+					    FSL_AUDMIX_FORMATS);
+}
+
+static int imx_audmix_fe_hw_params(struct snd_pcm_substream *substream,
+				   struct snd_pcm_hw_params *params)
+{
+	struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
+	struct device *dev = rtd->card->dev;
+	bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
+	unsigned int fmt = SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_NB_NF;
+	u32 channels = params_channels(params);
+	int ret, dir;
+
+	/* For playback the AUDMIX is consumer, and for record is provider */
+	fmt |= tx ? SND_SOC_DAIFMT_BP_FP : SND_SOC_DAIFMT_BC_FC;
+	dir  = tx ? SND_SOC_CLOCK_OUT : SND_SOC_CLOCK_IN;
+
+	/* set DAI configuration */
+	ret = snd_soc_dai_set_fmt(snd_soc_rtd_to_cpu(rtd, 0), fmt);
+	if (ret) {
+		dev_err(dev, "failed to set cpu dai fmt: %d\n", ret);
+		return ret;
+	}
+
+	ret = snd_soc_dai_set_sysclk(snd_soc_rtd_to_cpu(rtd, 0), FSL_SAI_CLK_MAST1, 0, dir);
+	if (ret) {
+		dev_err(dev, "failed to set cpu sysclk: %d\n", ret);
+		return ret;
+	}
+
+	/*
+	 * Per datasheet, AUDMIX expects 8 slots and 32 bits
+	 * for every slot in TDM mode.
+	 */
+	ret = snd_soc_dai_set_tdm_slot(snd_soc_rtd_to_cpu(rtd, 0), BIT(channels) - 1,
+				       BIT(channels) - 1, 8, 32);
+	if (ret)
+		dev_err(dev, "failed to set cpu dai tdm slot: %d\n", ret);
+
+	return ret;
+}
+
+static int imx_audmix_be_hw_params(struct snd_pcm_substream *substream,
+				   struct snd_pcm_hw_params *params)
+{
+	struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
+	struct device *dev = rtd->card->dev;
+	bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
+	unsigned int fmt = SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_NB_NF;
+	int ret;
+
+	if (!tx)
+		return 0;
+
+	/* For playback the AUDMIX is consumer */
+	fmt |= SND_SOC_DAIFMT_BC_FC;
+
+	/* set AUDMIX DAI configuration */
+	ret = snd_soc_dai_set_fmt(snd_soc_rtd_to_cpu(rtd, 0), fmt);
+	if (ret)
+		dev_err(dev, "failed to set AUDMIX DAI fmt: %d\n", ret);
+
+	return ret;
+}
+
+static const struct snd_soc_ops imx_audmix_fe_ops = {
+	.startup = imx_audmix_fe_startup,
+	.hw_params = imx_audmix_fe_hw_params,
+};
+
+static const struct snd_soc_ops imx_audmix_be_ops = {
+	.hw_params = imx_audmix_be_hw_params,
+};
+
+static const char *name[][3] = {
+	{"HiFi-AUDMIX-FE-0", "HiFi-AUDMIX-FE-1", "HiFi-AUDMIX-FE-2"},
+	{"sai-tx", "sai-tx", "sai-rx"},
+	{"AUDMIX-Playback-0", "AUDMIX-Playback-1", "SAI-Capture"},
+	{"SAI-Playback", "SAI-Playback", "AUDMIX-Capture-0"},
+};
+
+static int imx_audmix_probe(struct platform_device *pdev)
+{
+	struct device_node *np = pdev->dev.of_node;
+	struct device_node *audmix_np = NULL, *out_cpu_np = NULL;
+	struct platform_device *audmix_pdev = NULL;
+	struct platform_device *cpu_pdev;
+	struct of_phandle_args args;
+	struct imx_audmix *priv;
+	int i, num_dai, ret;
+	const char *fe_name_pref = "HiFi-AUDMIX-FE-";
+	char *be_name, *dai_name;
+
+	if (pdev->dev.parent) {
+		audmix_np = pdev->dev.parent->of_node;
+	} else {
+		dev_err(&pdev->dev, "Missing parent device.\n");
+		return -EINVAL;
+	}
+
+	if (!audmix_np) {
+		dev_err(&pdev->dev, "Missing DT node for parent device.\n");
+		return -EINVAL;
+	}
+
+	audmix_pdev = of_find_device_by_node(audmix_np);
+	if (!audmix_pdev) {
+		dev_err(&pdev->dev, "Missing AUDMIX platform device for %s\n",
+			np->full_name);
+		return -EINVAL;
+	}
+	put_device(&audmix_pdev->dev);
+
+	num_dai = of_count_phandle_with_args(audmix_np, "dais", NULL);
+	if (num_dai != FSL_AUDMIX_MAX_DAIS) {
+		dev_err(&pdev->dev, "Need 2 dais to be provided for %s\n",
+			audmix_np->full_name);
+		return -EINVAL;
+	}
+
+	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	num_dai += 1;
+	priv->num_dai = 2 * num_dai;
+	priv->dai = devm_kcalloc(&pdev->dev, priv->num_dai,
+				 sizeof(struct snd_soc_dai_link), GFP_KERNEL);
+	if (!priv->dai)
+		return -ENOMEM;
+
+	priv->num_dai_conf = num_dai;
+	priv->dai_conf = devm_kcalloc(&pdev->dev, priv->num_dai_conf,
+				      sizeof(struct snd_soc_codec_conf),
+				      GFP_KERNEL);
+	if (!priv->dai_conf)
+		return -ENOMEM;
+
+	priv->num_dapm_routes = num_dai;
+	priv->dapm_routes = devm_kcalloc(&pdev->dev, priv->num_dapm_routes,
+					 sizeof(struct snd_soc_dapm_route),
+					 GFP_KERNEL);
+	if (!priv->dapm_routes)
+		return -ENOMEM;
+
+	for (i = 0; i < num_dai; i++) {
+		struct snd_soc_dai_link_component *dlc;
+
+		/* for CPU x 2 */
+		dlc = devm_kcalloc(&pdev->dev, 2, sizeof(*dlc), GFP_KERNEL);
+		if (!dlc)
+			return -ENOMEM;
+
+		if (i == num_dai - 1)
+			ret = of_parse_phandle_with_args(audmix_np, "dais", NULL, 0,
+							 &args);
+		else
+			ret = of_parse_phandle_with_args(audmix_np, "dais", NULL, i,
+							 &args);
+		if (ret < 0) {
+			dev_err(&pdev->dev, "of_parse_phandle_with_args failed\n");
+			return ret;
+		}
+
+		cpu_pdev = of_find_device_by_node(args.np);
+		if (!cpu_pdev) {
+			dev_err(&pdev->dev, "failed to find SAI platform device\n");
+			return -EINVAL;
+		}
+		put_device(&cpu_pdev->dev);
+
+		dai_name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s%s",
+					  fe_name_pref, args.np->full_name);
+		if (!dai_name)
+			return -ENOMEM;
+
+		dev_info(pdev->dev.parent, "DAI FE name:%s\n", dai_name);
+
+		if (i == num_dai - 1)
+			out_cpu_np = args.np;
+
+		/*
+		 * CPU == Platform
+		 * platform is using soc-generic-dmaengine-pcm
+		 */
+		priv->dai[i].cpus	=
+		priv->dai[i].platforms	= &dlc[0];
+		priv->dai[i].codecs	= &snd_soc_dummy_dlc;
+
+		priv->dai[i].num_cpus = 1;
+		priv->dai[i].num_codecs = 1;
+		priv->dai[i].num_platforms = 1;
+		priv->dai[i].name = name[0][i];
+		priv->dai[i].stream_name = "HiFi-AUDMIX-FE";
+		priv->dai[i].cpus->of_node = args.np;
+		priv->dai[i].cpus->dai_name = name[1][i];
+
+		priv->dai[i].dynamic = 1;
+		if (i == num_dai - 1)
+			priv->dai[i].capture_only  = 1;
+		else
+			priv->dai[i].playback_only = 1;
+		priv->dai[i].ignore_pmdown_time = 1;
+		priv->dai[i].ops = &imx_audmix_fe_ops;
+
+		/* Add AUDMIX Backend */
+		be_name = devm_kasprintf(&pdev->dev, GFP_KERNEL,
+					 "audmix-%d", i);
+		if (!be_name)
+			return -ENOMEM;
+
+		priv->dai[num_dai + i].cpus	= &dlc[1];
+		priv->dai[num_dai + i].codecs	= &snd_soc_dummy_dlc;
+
+		priv->dai[num_dai + i].num_cpus = 1;
+		priv->dai[num_dai + i].num_codecs = 1;
+
+		priv->dai[num_dai + i].name = be_name;
+		priv->dai[num_dai + i].cpus->of_node = audmix_np;
+		priv->dai[num_dai + i].cpus->dai_name = be_name;
+		priv->dai[num_dai + i].no_pcm = 1;
+		if (i == num_dai - 1)
+			priv->dai[num_dai + i].capture_only  = 1;
+		else
+			priv->dai[num_dai + i].playback_only = 1;
+		priv->dai[num_dai + i].ignore_pmdown_time = 1;
+		priv->dai[num_dai + i].ops = &imx_audmix_be_ops;
+
+		priv->dai_conf[i].dlc.of_node = args.np;
+		priv->dai_conf[i].name_prefix = dai_name;
+
+		if (i == num_dai - 1) {
+			priv->dapm_routes[i].sink =
+				devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s %s",
+					       dai_name, name[2][i]);
+			if (!priv->dapm_routes[i].sink)
+				return -ENOMEM;
+
+			priv->dapm_routes[i].source = name[3][i];
+		} else {
+			priv->dapm_routes[i].source =
+				devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s %s",
+					       dai_name, name[3][i]);
+			if (!priv->dapm_routes[i].source)
+				return -ENOMEM;
+
+			priv->dapm_routes[i].sink = name[2][i];
+		}
+	}
+
+	cpu_pdev = of_find_device_by_node(out_cpu_np);
+	if (!cpu_pdev) {
+		dev_err(&pdev->dev, "failed to find SAI platform device\n");
+		return -EINVAL;
+	}
+	put_device(&cpu_pdev->dev);
+
+	priv->audmix_pdev = audmix_pdev;
+	priv->out_pdev  = cpu_pdev;
+
+	priv->card.dai_link = priv->dai;
+	priv->card.num_links = priv->num_dai;
+	priv->card.codec_conf = priv->dai_conf;
+	priv->card.num_configs = priv->num_dai_conf;
+	priv->card.dapm_routes = priv->dapm_routes;
+	priv->card.num_dapm_routes = priv->num_dapm_routes;
+	priv->card.dev = &pdev->dev;
+	priv->card.owner = THIS_MODULE;
+	priv->card.name = "imx-audmix";
+
+	platform_set_drvdata(pdev, &priv->card);
+	snd_soc_card_set_drvdata(&priv->card, priv);
+
+	ret = devm_snd_soc_register_card(&pdev->dev, &priv->card);
+	if (ret) {
+		dev_err(&pdev->dev, "snd_soc_register_card failed\n");
+		return ret;
+	}
+
+	return ret;
+}
+
+static struct platform_driver imx_audmix_driver = {
+	.probe = imx_audmix_probe,
+	.driver = {
+		.name = "imx-audmix",
+		.pm = &snd_soc_pm_ops,
+	},
+};
+module_platform_driver(imx_audmix_driver);
+
+MODULE_DESCRIPTION("NXP AUDMIX ASoC machine driver");
+MODULE_AUTHOR("Viorel Suman <viorel.suman@nxp.com>");
+MODULE_ALIAS("platform:imx-audmix");
+MODULE_LICENSE("GPL v2");