cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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imx-rpmsg.c (4117B)

      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_CBC_CFC;
     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");