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
  19 struct imx_rpmsg {
  20         struct snd_soc_dai_link dai;
  21         struct snd_soc_card card;
  22 };
  23
  24 static 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
  31 static 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
 132 fail:
 133         pdev->dev.of_node = NULL;
 134         return ret;
 135 }
 136
 137 static 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 };
 144 module_platform_driver(imx_rpmsg_driver);
 145
 146 MODULE_DESCRIPTION("Freescale SoC Audio RPMSG Machine Driver");
 147 MODULE_AUTHOR("Shengjiu Wang <[email protected]>");
 148 MODULE_ALIAS("platform:imx-audio-rpmsg");
 149 MODULE_LICENSE("GPL v2");