LXR linux/sound/soc/fsl/imx-rpmsg.c

   1// SPDX-License-Identifier: GPL-2.0+
   2// Copyright 2017-2020 NXP
   3
   4#include <linux/module.h>
   5#include <linux/of_platform.h>
   6#include <linux/of_reserved_mem.h>
   7#include <linux/i2c.h>
   8#include <linux/of_gpio.h>
   9#include <linux/slab.h>
  10#include <linux/gpio.h>
  11#include <linux/clk.h>
  12#include <sound/soc.h>
  13#include <sound/jack.h>
  14#include <sound/control.h>
  15#include <sound/pcm_params.h>
  16#include <sound/soc-dapm.h>
  17#include "imx-pcm-rpmsg.h"
  18
  19struct imx_rpmsg {
  20        struct snd_soc_dai_link dai;
  21        struct snd_soc_card card;
  22};
  23
  24static const struct snd_soc_dapm_widget imx_rpmsg_dapm_widgets[] = {
  25        SND_SOC_DAPM_HP("Headphone Jack", NULL),
  26        SND_SOC_DAPM_SPK("Ext Spk", NULL),
  27        SND_SOC_DAPM_MIC("Mic Jack", NULL),
  28        SND_SOC_DAPM_MIC("Main MIC", NULL),
  29};
  30
  31static int imx_rpmsg_probe(struct platform_device *pdev)
  32{
  33        struct snd_soc_dai_link_component *dlc;
  34        struct device *dev = pdev->dev.parent;
  35        /* rpmsg_pdev is the platform device for the rpmsg node that probed us */
  36        struct platform_device *rpmsg_pdev = to_platform_device(dev);
  37        struct device_node *np = rpmsg_pdev->dev.of_node;
  38        struct of_phandle_args args;
  39        struct imx_rpmsg *data;
  40        int ret = 0;
  41
  42        dlc = devm_kzalloc(&pdev->dev, 3 * sizeof(*dlc), GFP_KERNEL);
  43        if (!dlc)
  44                return -ENOMEM;
  45
  46        data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
  47        if (!data) {
  48                ret = -ENOMEM;
  49                goto fail;
  50        }
  51
  52        ret = of_reserved_mem_device_init_by_idx(&pdev->dev, np, 0);
  53        if (ret)
  54                dev_warn(&pdev->dev, "no reserved DMA memory\n");
  55
  56        data->dai.cpus = &dlc[0];
  57        data->dai.num_cpus = 1;
  58        data->dai.platforms = &dlc[1];
  59        data->dai.num_platforms = 1;
  60        data->dai.codecs = &dlc[2];
  61        data->dai.num_codecs = 1;
  62
  63        data->dai.name = "rpmsg hifi";
  64        data->dai.stream_name = "rpmsg hifi";
  65        data->dai.dai_fmt = SND_SOC_DAIFMT_I2S |
  66                            SND_SOC_DAIFMT_NB_NF |
  67                            SND_SOC_DAIFMT_CBS_CFS;
  68
  69        /* Optional codec node */
  70        ret = of_parse_phandle_with_fixed_args(np, "audio-codec", 0, 0, &args);
  71        if (ret) {
  72                data->dai.codecs->dai_name = "snd-soc-dummy-dai";
  73                data->dai.codecs->name = "snd-soc-dummy";
  74        } else {
  75                data->dai.codecs->of_node = args.np;
  76                ret = snd_soc_get_dai_name(&args, &data->dai.codecs->dai_name);
  77                if (ret) {
  78                        dev_err(&pdev->dev, "Unable to get codec_dai_name\n");
  79                        goto fail;
  80                }
  81        }
  82
  83        data->dai.cpus->dai_name = dev_name(&rpmsg_pdev->dev);
  84        data->dai.platforms->name = IMX_PCM_DRV_NAME;
  85        data->dai.playback_only = true;
  86        data->dai.capture_only = true;
  87        data->card.num_links = 1;
  88        data->card.dai_link = &data->dai;
  89
  90        if (of_property_read_bool(np, "fsl,rpmsg-out"))
  91                data->dai.capture_only = false;
  92
  93        if (of_property_read_bool(np, "fsl,rpmsg-in"))
  94                data->dai.playback_only = false;
  95
  96        if (data->dai.playback_only && data->dai.capture_only) {
  97                dev_err(&pdev->dev, "no enabled rpmsg DAI link\n");
  98                ret = -EINVAL;
  99                goto fail;
 100        }
 101
 102        data->card.dev = &pdev->dev;
 103        data->card.owner = THIS_MODULE;
 104        data->card.dapm_widgets = imx_rpmsg_dapm_widgets;
 105        data->card.num_dapm_widgets = ARRAY_SIZE(imx_rpmsg_dapm_widgets);
 106        /*
 107         * Inoder to use common api to get card name and audio routing.
 108         * Use parent of_node for this device, revert it after finishing using
 109         */
 110        data->card.dev->of_node = np;
 111
 112        ret = snd_soc_of_parse_card_name(&data->card, "model");
 113        if (ret)
 114                goto fail;
 115
 116        if (of_property_read_bool(np, "audio-routing")) {
 117                ret = snd_soc_of_parse_audio_routing(&data->card, "audio-routing");
 118                if (ret) {
 119                        dev_err(&pdev->dev, "failed to parse audio-routing: %d\n", ret);
 120                        goto fail;
 121                }
 122        }
 123
 124        platform_set_drvdata(pdev, &data->card);
 125        snd_soc_card_set_drvdata(&data->card, data);
 126        ret = devm_snd_soc_register_card(&pdev->dev, &data->card);
 127        if (ret) {
 128                dev_err_probe(&pdev->dev, ret, "snd_soc_register_card failed\n");
 129                goto fail;
 130        }
 131
 132fail:
 133        pdev->dev.of_node = NULL;
 134        return ret;
 135}
 136
 137static struct platform_driver imx_rpmsg_driver = {
 138        .driver = {
 139                .name = "imx-audio-rpmsg",
 140                .pm = &snd_soc_pm_ops,
 141        },
 142        .probe = imx_rpmsg_probe,
 143};
 144module_platform_driver(imx_rpmsg_driver);
 145
 146MODULE_DESCRIPTION("Freescale SoC Audio RPMSG Machine Driver");
 147MODULE_AUTHOR("Shengjiu Wang <shengjiu.wang@nxp.com>");
 148MODULE_ALIAS("platform:imx-audio-rpmsg");
 149MODULE_LICENSE("GPL v2");
 150