| // 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; |
| 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->dai_name = "snd-soc-dummy-dai"; |
| data->dai.codecs->name = "snd-soc-dummy"; |
| } else { |
| struct clk *clk; |
| |
| data->dai.codecs->of_node = args.np; |
| ret = snd_soc_get_dai_name(&args, &data->dai.codecs->dai_name); |
| 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); |
| data->dai.platforms->name = IMX_PCM_DRV_NAME; |
| 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"); |