diff options
Diffstat (limited to 'sound/soc/fsl/imx-rpmsg.c')
| -rw-r--r-- | sound/soc/fsl/imx-rpmsg.c | 188 |
1 files changed, 188 insertions, 0 deletions
diff --git a/sound/soc/fsl/imx-rpmsg.c b/sound/soc/fsl/imx-rpmsg.c new file mode 100644 index 0000000000..b578f9a32d --- /dev/null +++ b/sound/soc/fsl/imx-rpmsg.c @@ -0,0 +1,188 @@ +// 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; + unsigned long sysclk; +}; + +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_late_probe(struct snd_soc_card *card) +{ + struct imx_rpmsg *data = snd_soc_card_get_drvdata(card); + struct snd_soc_pcm_runtime *rtd = list_first_entry(&card->rtd_list, + struct snd_soc_pcm_runtime, list); + struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0); + struct device *dev = card->dev; + int ret; + + if (!data->sysclk) + return 0; + + ret = snd_soc_dai_set_sysclk(codec_dai, 0, data->sysclk, SND_SOC_CLOCK_IN); + if (ret && ret != -ENOTSUPP) { + dev_err(dev, "failed to set sysclk in %s\n", __func__); + return ret; + } + + return 0; +} + +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; + const char *platform_name; + 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_CBC_CFC; + + /* + * i.MX rpmsg sound cards work on codec slave mode. MCLK will be + * disabled by CPU DAI driver in hw_free(). Some codec requires MCLK + * present at power up/down sequence. So need to set ignore_pmdown_time + * to power down codec immediately before MCLK is turned off. + */ + data->dai.ignore_pmdown_time = 1; + + /* Optional codec node */ + ret = of_parse_phandle_with_fixed_args(np, "audio-codec", 0, 0, &args); + if (ret) { + *data->dai.codecs = asoc_dummy_dlc; + } else { + struct clk *clk; + + ret = snd_soc_get_dlc(&args, data->dai.codecs); + if (ret) { + dev_err(&pdev->dev, "Unable to get codec_dai_name\n"); + goto fail; + } + + clk = devm_get_clk_from_child(&pdev->dev, args.np, NULL); + if (!IS_ERR(clk)) + data->sysclk = clk_get_rate(clk); + } + + data->dai.cpus->dai_name = dev_name(&rpmsg_pdev->dev); + if (!of_property_read_string(np, "fsl,rpmsg-channel-name", &platform_name)) + data->dai.platforms->name = platform_name; + else + data->dai.platforms->name = "rpmsg-audio-channel"; + 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); + data->card.late_probe = imx_rpmsg_late_probe; + /* + * 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_probe(&pdev->dev, ret, "snd_soc_register_card failed\n"); + goto fail; + } + +fail: + pdev->dev.of_node = NULL; + return ret; +} + +static struct platform_driver imx_rpmsg_driver = { + .driver = { + .name = "imx-audio-rpmsg", + .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"); |