150 lines
4.0 KiB
C
150 lines
4.0 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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// Copyright 2017-2020 NXP
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#include <linux/module.h>
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#include <linux/of_platform.h>
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#include <linux/of_reserved_mem.h>
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#include <linux/i2c.h>
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#include <linux/of_gpio.h>
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#include <linux/slab.h>
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#include <linux/gpio.h>
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#include <linux/clk.h>
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#include <sound/soc.h>
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#include <sound/jack.h>
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#include <sound/control.h>
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#include <sound/pcm_params.h>
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#include <sound/soc-dapm.h>
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#include "imx-pcm-rpmsg.h"
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struct imx_rpmsg {
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struct snd_soc_dai_link dai;
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struct snd_soc_card card;
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};
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static const struct snd_soc_dapm_widget imx_rpmsg_dapm_widgets[] = {
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SND_SOC_DAPM_HP("Headphone Jack", NULL),
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SND_SOC_DAPM_SPK("Ext Spk", NULL),
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SND_SOC_DAPM_MIC("Mic Jack", NULL),
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SND_SOC_DAPM_MIC("Main MIC", NULL),
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};
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static int imx_rpmsg_probe(struct platform_device *pdev)
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{
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struct snd_soc_dai_link_component *dlc;
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struct device *dev = pdev->dev.parent;
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/* rpmsg_pdev is the platform device for the rpmsg node that probed us */
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struct platform_device *rpmsg_pdev = to_platform_device(dev);
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struct device_node *np = rpmsg_pdev->dev.of_node;
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struct of_phandle_args args;
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struct imx_rpmsg *data;
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int ret = 0;
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dlc = devm_kzalloc(&pdev->dev, 3 * sizeof(*dlc), GFP_KERNEL);
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if (!dlc)
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return -ENOMEM;
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data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
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if (!data) {
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ret = -ENOMEM;
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goto fail;
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}
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ret = of_reserved_mem_device_init_by_idx(&pdev->dev, np, 0);
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if (ret)
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dev_warn(&pdev->dev, "no reserved DMA memory\n");
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data->dai.cpus = &dlc[0];
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data->dai.num_cpus = 1;
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data->dai.platforms = &dlc[1];
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data->dai.num_platforms = 1;
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data->dai.codecs = &dlc[2];
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data->dai.num_codecs = 1;
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data->dai.name = "rpmsg hifi";
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data->dai.stream_name = "rpmsg hifi";
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data->dai.dai_fmt = SND_SOC_DAIFMT_I2S |
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SND_SOC_DAIFMT_NB_NF |
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SND_SOC_DAIFMT_CBC_CFC;
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/* Optional codec node */
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ret = of_parse_phandle_with_fixed_args(np, "audio-codec", 0, 0, &args);
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if (ret) {
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data->dai.codecs->dai_name = "snd-soc-dummy-dai";
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data->dai.codecs->name = "snd-soc-dummy";
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} else {
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data->dai.codecs->of_node = args.np;
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ret = snd_soc_get_dai_name(&args, &data->dai.codecs->dai_name);
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if (ret) {
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dev_err(&pdev->dev, "Unable to get codec_dai_name\n");
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goto fail;
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}
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}
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data->dai.cpus->dai_name = dev_name(&rpmsg_pdev->dev);
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data->dai.platforms->name = IMX_PCM_DRV_NAME;
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data->dai.playback_only = true;
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data->dai.capture_only = true;
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data->card.num_links = 1;
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data->card.dai_link = &data->dai;
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if (of_property_read_bool(np, "fsl,rpmsg-out"))
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data->dai.capture_only = false;
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if (of_property_read_bool(np, "fsl,rpmsg-in"))
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data->dai.playback_only = false;
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if (data->dai.playback_only && data->dai.capture_only) {
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dev_err(&pdev->dev, "no enabled rpmsg DAI link\n");
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ret = -EINVAL;
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goto fail;
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}
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data->card.dev = &pdev->dev;
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data->card.owner = THIS_MODULE;
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data->card.dapm_widgets = imx_rpmsg_dapm_widgets;
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data->card.num_dapm_widgets = ARRAY_SIZE(imx_rpmsg_dapm_widgets);
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/*
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* Inoder to use common api to get card name and audio routing.
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* Use parent of_node for this device, revert it after finishing using
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*/
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data->card.dev->of_node = np;
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ret = snd_soc_of_parse_card_name(&data->card, "model");
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if (ret)
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goto fail;
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if (of_property_read_bool(np, "audio-routing")) {
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ret = snd_soc_of_parse_audio_routing(&data->card, "audio-routing");
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if (ret) {
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dev_err(&pdev->dev, "failed to parse audio-routing: %d\n", ret);
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goto fail;
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}
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}
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platform_set_drvdata(pdev, &data->card);
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snd_soc_card_set_drvdata(&data->card, data);
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ret = devm_snd_soc_register_card(&pdev->dev, &data->card);
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if (ret) {
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dev_err_probe(&pdev->dev, ret, "snd_soc_register_card failed\n");
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goto fail;
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}
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fail:
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pdev->dev.of_node = NULL;
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return ret;
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}
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static struct platform_driver imx_rpmsg_driver = {
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.driver = {
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.name = "imx-audio-rpmsg",
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.pm = &snd_soc_pm_ops,
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},
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.probe = imx_rpmsg_probe,
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};
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module_platform_driver(imx_rpmsg_driver);
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MODULE_DESCRIPTION("Freescale SoC Audio RPMSG Machine Driver");
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MODULE_AUTHOR("Shengjiu Wang <shengjiu.wang@nxp.com>");
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MODULE_ALIAS("platform:imx-audio-rpmsg");
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MODULE_LICENSE("GPL v2");
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