Merge tag 'sound-5.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai...

[sfrench/cifs-2.6.git] / sound / soc / fsl / imx-rpmsg.c

diff --git a/sound/soc/fsl/imx-rpmsg.c b/sound/soc/fsl/imx-rpmsg.c
new file mode 100644 (file)
index 0000000..5a9a470
--- /dev/null
+++ b/sound/soc/fsl/imx-rpmsg.c
@@ -0,0 +1,150 @@
+// 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;
+};
+
+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_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;
+       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_CBS_CFS;
+
+       /* Optional codec node */
+       ret = of_parse_phandle_with_fixed_args(np, "audio-codec", 0, 0, &args);
+       if (ret) {
+               data->dai.codecs->dai_name = "snd-soc-dummy-dai";
+               data->dai.codecs->name = "snd-soc-dummy";
+       } else {
+               data->dai.codecs->of_node = args.np;
+               ret = snd_soc_get_dai_name(&args, &data->dai.codecs->dai_name);
+               if (ret) {
+                       dev_err(&pdev->dev, "Unable to get codec_dai_name\n");
+                       goto fail;
+               }
+       }
+
+       data->dai.cpus->dai_name = dev_name(&rpmsg_pdev->dev);
+       data->dai.platforms->name = IMX_PCM_DRV_NAME;
+       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);
+       /*
+        * 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(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
+               goto fail;
+       }
+
+fail:
+       pdev->dev.of_node = NULL;
+       return ret;
+}
+
+static struct platform_driver imx_rpmsg_driver = {
+       .driver = {
+               .name = "imx-audio-rpmsg",
+               .owner = THIS_MODULE,
+               .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");