Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 188 insertions, 0 deletions

diff --git a/sound/soc/fsl/imx-rpmsg.c b/sound/soc/fsl/imx-rpmsg.c
new file mode 100644
index 0000000000..b578f9a32d
--- /dev/null
+++ b/sound/soc/fsl/imx-rpmsg.c
@@ -0,0 +1,188 @@
+// SPDX-License-Identifier: GPL-2.0+
+// Copyright 2017-2020 NXP
+
+#include <linux/module.h>
+#include <linux/of_platform.h>
+#include <linux/of_reserved_mem.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>
+#include "imx-pcm-rpmsg.h"
+
+struct imx_rpmsg {
+	struct snd_soc_dai_link dai;
+	struct snd_soc_card card;
+	unsigned long sysclk;
+};
+
+static const struct snd_soc_dapm_widget imx_rpmsg_dapm_widgets[] = {
+	SND_SOC_DAPM_HP("Headphone Jack", NULL),
+	SND_SOC_DAPM_SPK("Ext Spk", NULL),
+	SND_SOC_DAPM_MIC("Mic Jack", NULL),
+	SND_SOC_DAPM_MIC("Main MIC", NULL),
+};
+
+static int imx_rpmsg_late_probe(struct snd_soc_card *card)
+{
+	struct imx_rpmsg *data = snd_soc_card_get_drvdata(card);
+	struct snd_soc_pcm_runtime *rtd = list_first_entry(&card->rtd_list,
+							   struct snd_soc_pcm_runtime, list);
+	struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
+	struct device *dev = card->dev;
+	int ret;
+
+	if (!data->sysclk)
+		return 0;
+
+	ret = snd_soc_dai_set_sysclk(codec_dai, 0, data->sysclk, SND_SOC_CLOCK_IN);
+	if (ret && ret != -ENOTSUPP) {
+		dev_err(dev, "failed to set sysclk in %s\n", __func__);
+		return ret;
+	}
+
+	return 0;
+}
+
+static int imx_rpmsg_probe(struct platform_device *pdev)
+{
+	struct snd_soc_dai_link_component *dlc;
+	struct device *dev = pdev->dev.parent;
+	/* rpmsg_pdev is the platform device for the rpmsg node that probed us */
+	struct platform_device *rpmsg_pdev = to_platform_device(dev);
+	struct device_node *np = rpmsg_pdev->dev.of_node;
+	struct of_phandle_args args;
+	const char *platform_name;
+	struct imx_rpmsg *data;
+	int ret = 0;
+
+	dlc = devm_kzalloc(&pdev->dev, 3 * sizeof(*dlc), GFP_KERNEL);
+	if (!dlc)
+		return -ENOMEM;
+
+	data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
+	if (!data) {
+		ret = -ENOMEM;
+		goto fail;
+	}
+
+	ret = of_reserved_mem_device_init_by_idx(&pdev->dev, np, 0);
+	if (ret)
+		dev_warn(&pdev->dev, "no reserved DMA memory\n");
+
+	data->dai.cpus = &dlc[0];
+	data->dai.num_cpus = 1;
+	data->dai.platforms = &dlc[1];
+	data->dai.num_platforms = 1;
+	data->dai.codecs = &dlc[2];
+	data->dai.num_codecs = 1;
+
+	data->dai.name = "rpmsg hifi";
+	data->dai.stream_name = "rpmsg hifi";
+	data->dai.dai_fmt = SND_SOC_DAIFMT_I2S |
+			    SND_SOC_DAIFMT_NB_NF |
+			    SND_SOC_DAIFMT_CBC_CFC;
+
+	/*
+	 * i.MX rpmsg sound cards work on codec slave mode. MCLK will be
+	 * disabled by CPU DAI driver in hw_free(). Some codec requires MCLK
+	 * present at power up/down sequence. So need to set ignore_pmdown_time
+	 * to power down codec immediately before MCLK is turned off.
+	 */
+	data->dai.ignore_pmdown_time = 1;
+
+	/* Optional codec node */
+	ret = of_parse_phandle_with_fixed_args(np, "audio-codec", 0, 0, &args);
+	if (ret) {
+		*data->dai.codecs = asoc_dummy_dlc;
+	} else {
+		struct clk *clk;
+
+		ret = snd_soc_get_dlc(&args, data->dai.codecs);
+		if (ret) {
+			dev_err(&pdev->dev, "Unable to get codec_dai_name\n");
+			goto fail;
+		}
+
+		clk = devm_get_clk_from_child(&pdev->dev, args.np, NULL);
+		if (!IS_ERR(clk))
+			data->sysclk = clk_get_rate(clk);
+	}
+
+	data->dai.cpus->dai_name = dev_name(&rpmsg_pdev->dev);
+	if (!of_property_read_string(np, "fsl,rpmsg-channel-name", &platform_name))
+		data->dai.platforms->name = platform_name;
+	else
+		data->dai.platforms->name = "rpmsg-audio-channel";
+	data->dai.playback_only = true;
+	data->dai.capture_only = true;
+	data->card.num_links = 1;
+	data->card.dai_link = &data->dai;
+
+	if (of_property_read_bool(np, "fsl,rpmsg-out"))
+		data->dai.capture_only = false;
+
+	if (of_property_read_bool(np, "fsl,rpmsg-in"))
+		data->dai.playback_only = false;
+
+	if (data->dai.playback_only && data->dai.capture_only) {
+		dev_err(&pdev->dev, "no enabled rpmsg DAI link\n");
+		ret = -EINVAL;
+		goto fail;
+	}
+
+	data->card.dev = &pdev->dev;
+	data->card.owner = THIS_MODULE;
+	data->card.dapm_widgets = imx_rpmsg_dapm_widgets;
+	data->card.num_dapm_widgets = ARRAY_SIZE(imx_rpmsg_dapm_widgets);
+	data->card.late_probe = imx_rpmsg_late_probe;
+	/*
+	 * Inoder to use common api to get card name and audio routing.
+	 * Use parent of_node for this device, revert it after finishing using
+	 */
+	data->card.dev->of_node = np;
+
+	ret = snd_soc_of_parse_card_name(&data->card, "model");
+	if (ret)
+		goto fail;
+
+	if (of_property_read_bool(np, "audio-routing")) {
+		ret = snd_soc_of_parse_audio_routing(&data->card, "audio-routing");
+		if (ret) {
+			dev_err(&pdev->dev, "failed to parse audio-routing: %d\n", 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_probe(&pdev->dev, ret, "snd_soc_register_card failed\n");
+		goto fail;
+	}
+
+fail:
+	pdev->dev.of_node = NULL;
+	return ret;
+}
+
+static struct platform_driver imx_rpmsg_driver = {
+	.driver = {
+		.name = "imx-audio-rpmsg",
+		.pm = &snd_soc_pm_ops,
+	},
+	.probe = imx_rpmsg_probe,
+};
+module_platform_driver(imx_rpmsg_driver);
+
+MODULE_DESCRIPTION("Freescale SoC Audio RPMSG Machine Driver");
+MODULE_AUTHOR("Shengjiu Wang <shengjiu.wang@nxp.com>");
+MODULE_ALIAS("platform:imx-audio-rpmsg");
+MODULE_LICENSE("GPL v2");