MLK-18497-12: ASoC: fsl: imx-dsp: Add DSP machine driver

Finally! We register DSP as a sound card.

Reviewed-by: Cosmin-Gabriel Samoila <cosmin.samoila@nxp.com>
Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Signed-off-by: Daniel Baluta <daniel.baluta@nxp.com>
(cherry picked from commit 3e993bbaa64fb366fc99650a7f837e30fa1b466d)
(Vipul: Fixed merge conflicts)
Signed-off-by: Vipul Kumar <vipul_kumar@mentor.com>

sound/soc/fsl/Kconfig

@@ -529,6 +529,15 @@ config SND_SOC_IMX_CDNHDMI
 	  Say Y if you want to add support for SoC audio on an i.MX board with
 	  IMX CDN HDMI.
 
+config SND_SOC_IMX_DSP
+	tristate "SoC Audio support for i.MX boards with DSP port"
+	select SND_SOC_FSL_DSP
+	select SND_SOC_COMPRESS
+	help
+	  SoC Audio support for i.MX boards with DSP audio
+	  Say Y if you want to add support for SoC audio on an i.MX board with
+	  IMX DSP.
+
 config SND_SOC_IMX_PDM_MIC
 	tristate "SoC Audio support for i.MX boards with PDM mic on SAI"
 	depends on OF

sound/soc/fsl/Makefile

@@ -89,6 +89,8 @@ snd-soc-imx-pdm-objs := imx-pdm.o
 snd-soc-imx-ak4458-objs := imx-ak4458.o
 snd-soc-imx-ak5558-objs := imx-ak5558.o
 snd-soc-imx-ak4497-objs := imx-ak4497.o
+snd-soc-imx-micfil-objs := imx-micfil.o
+snd-soc-imx-dsp-objs := imx-dsp.o
 
 obj-$(CONFIG_SND_SOC_EUKREA_TLV320) += snd-soc-eukrea-tlv320.o
 obj-$(CONFIG_SND_SOC_PHYCORE_AC97) += snd-soc-phycore-ac97.o
@@ -116,5 +118,6 @@ obj-$(CONFIG_SND_SOC_IMX_AK4497) += snd-soc-imx-ak4497.o
 obj-$(CONFIG_SND_SOC_IMX_AK5558) += snd-soc-imx-ak5558.o
 obj-$(CONFIG_SND_SOC_IMX_CDNHDMI) += snd-soc-imx-cdnhdmi.o
 obj-$(CONFIG_SND_SOC_IMX_HDMI) += snd-soc-imx-hdmi.o
+obj-$(CONFIG_SND_SOC_IMX_DSP) += snd-soc-imx-dsp.o
 
 AFLAGS_hdmi_pcm.o := -march=armv7-a -mtune=cortex-a9 -mfpu=neon -mfloat-abi=softfp

sound/soc/fsl/imx-dsp.c

+// SPDX-License-Identifier: (GPL-2.0+
+//
+// DSP machine driver
+//
+// Copyright (c) 2012-2013 by Tensilica Inc. ALL RIGHTS RESERVED.
+// Copyright 2018 NXP
+
+#include <linux/module.h>
+#include <linux/of_platform.h>
+#include <linux/i2c.h>
+#include <linux/of_gpio.h>
+#include <linux/slab.h>
+#include <linux/gpio.h>
+#include <linux/clk.h>
+#include <sound/soc.h>
+#include <sound/jack.h>
+#include <sound/control.h>
+#include <sound/pcm_params.h>
+#include <sound/soc-dapm.h>
+
+struct imx_dsp_audio_data {
+	struct snd_soc_dai_link dai[2];
+	struct snd_soc_card card;
+};
+
+static int imx_dsp_hw_params(struct snd_pcm_substream *substream,
+					 struct snd_pcm_hw_params *params)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct snd_soc_dai *codec_dai = rtd->codec_dai;
+	int ret;
+	u32 dai_format = SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_LEFT_J |
+			SND_SOC_DAIFMT_CBS_CFS;
+
+	ret = snd_soc_dai_set_sysclk(codec_dai, 0,
+					24576000, SND_SOC_CLOCK_IN);
+	if (ret) {
+		dev_err(rtd->dev, "failed to set codec sysclk: %d\n", ret);
+		return ret;
+	}
+
+	ret = snd_soc_dai_set_fmt(codec_dai, dai_format);
+	if (ret) {
+		dev_err(rtd->dev, "failed to set codec dai fmt: %d\n", ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+static struct snd_soc_ops imx_dsp_ops_be = {
+	.hw_params = imx_dsp_hw_params,
+};
+
+static int be_hw_params_fixup(struct snd_soc_pcm_runtime *rtd,
+				struct snd_pcm_hw_params *params) {
+
+	struct snd_interval *rate;
+	struct snd_interval *channels;
+	struct snd_mask *mask;
+
+	rate = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
+	rate->max = rate->min = 48000;
+
+	channels = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
+	channels->max = channels->min = 2;
+
+	mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
+	snd_mask_none(mask);
+	snd_mask_set(mask, SNDRV_PCM_FORMAT_S16_LE);
+
+	return 0;
+}
+
+static const struct snd_soc_dapm_route imx_dsp_audio_map[] = {
+	{"Playback",  NULL, "Compress Playback"},/* dai route for be and fe */
+	{"Playback",  NULL, "Playback"},
+};
+
+static int imx_dsp_audio_probe(struct platform_device *pdev)
+{
+	struct device_node *cpu_np=NULL, *codec_np=NULL, *platform_np=NULL;
+	struct platform_device *cpu_pdev;
+	struct imx_dsp_audio_data *data;
+	int ret;
+
+	data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
+	if (!data) {
+		ret = -ENOMEM;
+		goto fail;
+	}
+
+	cpu_np = of_parse_phandle(pdev->dev.of_node, "cpu-dai", 0);
+	if (!cpu_np) {
+		dev_err(&pdev->dev, "cpu dai phandle missing or invalid\n");
+		ret = -EINVAL;
+		goto fail;
+	}
+
+	cpu_pdev = of_find_device_by_node(cpu_np);
+	if (!cpu_pdev) {
+		dev_err(&pdev->dev, "failed to find rpmsg platform device\n");
+		ret = -EINVAL;
+		goto fail;
+	}
+
+        codec_np = of_parse_phandle(pdev->dev.of_node, "audio-codec", 0);
+        if (!codec_np) {
+                dev_err(&pdev->dev, "phandle missing or invalid\n");
+                ret = -EINVAL;
+                goto fail;
+        }
+
+        platform_np = of_parse_phandle(pdev->dev.of_node, "audio-platform", 0);
+        if (!platform_np) {
+                dev_err(&pdev->dev, "platform missing or invalid\n");
+                ret = -EINVAL;
+                goto fail;
+        }
+
+	data->dai[0].name = "dsp hifi fe";
+	data->dai[0].stream_name = "dsp hifi fe";
+	data->dai[0].codec_dai_name = "snd-soc-dummy-dai";
+	data->dai[0].codec_name = "snd-soc-dummy";
+	data->dai[0].cpu_dai_name = dev_name(&cpu_pdev->dev);
+	data->dai[0].cpu_of_node = cpu_np;
+	data->dai[0].platform_of_node = platform_np;
+	data->dai[0].playback_only = true;
+	data->dai[0].capture_only = false;
+	data->dai[0].dpcm_playback = 1;
+	data->dai[0].dpcm_capture = 0;
+	data->dai[0].dynamic = 1,
+	data->dai[0].ignore_pmdown_time = 1,
+	data->dai[0].dai_fmt = SND_SOC_DAIFMT_LEFT_J |
+			    SND_SOC_DAIFMT_NB_NF |
+			    SND_SOC_DAIFMT_CBS_CFS;
+
+	data->dai[1].name = "dsp hifi be";
+	data->dai[1].stream_name = "dsp hifi be";
+	data->dai[1].codec_dai_name = "cs42888";
+	data->dai[1].codec_of_node = codec_np;
+	data->dai[1].cpu_dai_name = "snd-soc-dummy-dai";
+	data->dai[1].cpu_name = "snd-soc-dummy";
+	data->dai[1].platform_name = "snd-soc-dummy";
+	data->dai[1].playback_only = true;
+	data->dai[1].capture_only = false;
+	data->dai[1].dpcm_playback = 1;
+	data->dai[1].dpcm_capture = 0;
+	data->dai[1].no_pcm = 1,
+	data->dai[1].ignore_pmdown_time = 1,
+	data->dai[1].dai_fmt = SND_SOC_DAIFMT_LEFT_J |
+			    SND_SOC_DAIFMT_NB_NF |
+			    SND_SOC_DAIFMT_CBS_CFS;
+	data->dai[1].ops = &imx_dsp_ops_be;
+	data->dai[1].be_hw_params_fixup = be_hw_params_fixup;
+
+	data->card.dapm_routes = imx_dsp_audio_map;
+	data->card.num_dapm_routes = ARRAY_SIZE(imx_dsp_audio_map);
+	data->card.num_links = 2;
+	data->card.dai_link = data->dai;
+
+	data->card.dev = &pdev->dev;
+	data->card.owner = THIS_MODULE;
+	ret = snd_soc_of_parse_card_name(&data->card, "model");
+	if (ret)
+		goto fail;
+
+	platform_set_drvdata(pdev, &data->card);
+	snd_soc_card_set_drvdata(&data->card, data);
+	ret = devm_snd_soc_register_card(&pdev->dev, &data->card);
+	if (ret) {
+		dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
+		goto fail;
+	}
+
+fail:
+	if (cpu_np)
+		of_node_put(cpu_np);
+	if (codec_np)
+		of_node_put(codec_np);
+	if (platform_np)
+		of_node_put(platform_np);
+	return ret;
+}
+
+static const struct of_device_id imx_dsp_audio_dt_ids[] = {
+	{ .compatible = "fsl,imx-dsp-audio", },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, imx_dsp_audio_dt_ids);
+
+static struct platform_driver imx_dsp_audio_driver = {
+	.driver = {
+		.name = "imx-dsp-audio",
+		.owner = THIS_MODULE,
+		.pm = &snd_soc_pm_ops,
+		.of_match_table = imx_dsp_audio_dt_ids,
+	},
+	.probe = imx_dsp_audio_probe,
+};
+module_platform_driver(imx_dsp_audio_driver);
+
+MODULE_LICENSE("GPL v2");