// SPDX-License-Identifier: GPL-2.0 /* * Copyright 2017 NXP * * The code contained herein is licensed under the GNU General Public * License. You may obtain a copy of the GNU General Public License * Version 2 or later at the following locations: * * https://www.opensource.org/licenses/gpl-license.html * https://www.gnu.org/copyleft/gpl.html */ #include #include #include #include #include #include #include "fsl_sai.h" #include "fsl_audmix.h" struct imx_audmix { struct platform_device *pdev; struct snd_soc_card card; struct platform_device *audmix_pdev; struct platform_device *out_pdev; struct clk *cpu_mclk; int num_dai; struct snd_soc_dai_link *dai; int num_dai_conf; struct snd_soc_codec_conf *dai_conf; int num_dapm_routes; struct snd_soc_dapm_route *dapm_routes; }; static const u32 imx_audmix_rates[] = { 8000, 12000, 16000, 24000, 32000, 48000, 64000, 96000, }; static const struct snd_pcm_hw_constraint_list imx_audmix_rate_constraints = { .count = ARRAY_SIZE(imx_audmix_rates), .list = imx_audmix_rates, }; static int imx_audmix_fe_startup(struct snd_pcm_substream *substream) { struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); struct imx_audmix *priv = snd_soc_card_get_drvdata(rtd->card); struct snd_pcm_runtime *runtime = substream->runtime; struct device *dev = rtd->card->dev; unsigned long clk_rate = clk_get_rate(priv->cpu_mclk); int ret; if (clk_rate % 24576000 == 0) { ret = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, &imx_audmix_rate_constraints); if (ret < 0) return ret; } else { dev_warn(dev, "mclk may be not supported %lu\n", clk_rate); } ret = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS, 1, 8); if (ret < 0) return ret; return snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, FSL_AUDMIX_FORMATS); } static int imx_audmix_fe_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params) { struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); struct device *dev = rtd->card->dev; bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; unsigned int fmt = SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_NB_NF; u32 channels = params_channels(params); int ret, dir; /* For playback the AUDMIX is slave, and for record is master */ fmt |= tx ? SND_SOC_DAIFMT_CBS_CFS : SND_SOC_DAIFMT_CBM_CFM; dir = tx ? SND_SOC_CLOCK_OUT : SND_SOC_CLOCK_IN; /* set DAI configuration */ ret = snd_soc_dai_set_fmt(asoc_rtd_to_cpu(rtd, 0), fmt); if (ret) { dev_err(dev, "failed to set cpu dai fmt: %d\n", ret); return ret; } ret = snd_soc_dai_set_sysclk(asoc_rtd_to_cpu(rtd, 0), FSL_SAI_CLK_MAST1, 0, dir); if (ret) { dev_err(dev, "failed to set cpu sysclk: %d\n", ret); return ret; } /* * Per datasheet, AUDMIX expects 8 slots and 32 bits * for every slot in TDM mode. */ ret = snd_soc_dai_set_tdm_slot(asoc_rtd_to_cpu(rtd, 0), BIT(channels) - 1, BIT(channels) - 1, 8, 32); if (ret) dev_err(dev, "failed to set cpu dai tdm slot: %d\n", ret); return ret; } static int imx_audmix_be_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params) { struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); struct device *dev = rtd->card->dev; bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; unsigned int fmt = SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_NB_NF; int ret; if (!tx) return 0; /* For playback the AUDMIX is slave */ fmt |= SND_SOC_DAIFMT_CBM_CFM; /* set AUDMIX DAI configuration */ ret = snd_soc_dai_set_fmt(asoc_rtd_to_cpu(rtd, 0), fmt); if (ret) dev_err(dev, "failed to set AUDMIX DAI fmt: %d\n", ret); return ret; } static struct snd_soc_ops imx_audmix_fe_ops = { .startup = imx_audmix_fe_startup, .hw_params = imx_audmix_fe_hw_params, }; static struct snd_soc_ops imx_audmix_be_ops = { .hw_params = imx_audmix_be_hw_params, }; static int imx_audmix_probe(struct platform_device *pdev) { struct device_node *np = pdev->dev.of_node; struct device_node *audmix_np = NULL, *out_cpu_np = NULL; struct platform_device *audmix_pdev = NULL; struct platform_device *cpu_pdev; struct of_phandle_args args; struct imx_audmix *priv; int i, num_dai, ret; const char *fe_name_pref = "HiFi-AUDMIX-FE-"; char *be_name, *be_pb, *be_cp, *dai_name, *capture_dai_name; if (pdev->dev.parent) { audmix_np = pdev->dev.parent->of_node; } else { dev_err(&pdev->dev, "Missing parent device.\n"); return -EINVAL; } if (!audmix_np) { dev_err(&pdev->dev, "Missing DT node for parent device.\n"); return -EINVAL; } audmix_pdev = of_find_device_by_node(audmix_np); if (!audmix_pdev) { dev_err(&pdev->dev, "Missing AUDMIX platform device for %s\n", np->full_name); return -EINVAL; } put_device(&audmix_pdev->dev); num_dai = of_count_phandle_with_args(audmix_np, "dais", NULL); if (num_dai != FSL_AUDMIX_MAX_DAIS) { dev_err(&pdev->dev, "Need 2 dais to be provided for %s\n", audmix_np->full_name); return -EINVAL; } priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); if (!priv) return -ENOMEM; priv->num_dai = 2 * num_dai; priv->dai = devm_kcalloc(&pdev->dev, priv->num_dai, sizeof(struct snd_soc_dai_link), GFP_KERNEL); if (!priv->dai) return -ENOMEM; priv->num_dai_conf = num_dai; priv->dai_conf = devm_kcalloc(&pdev->dev, priv->num_dai_conf, sizeof(struct snd_soc_codec_conf), GFP_KERNEL); if (!priv->dai_conf) return -ENOMEM; priv->num_dapm_routes = 3 * num_dai; priv->dapm_routes = devm_kcalloc(&pdev->dev, priv->num_dapm_routes, sizeof(struct snd_soc_dapm_route), GFP_KERNEL); if (!priv->dapm_routes) return -ENOMEM; for (i = 0; i < num_dai; i++) { struct snd_soc_dai_link_component *dlc; /* for CPU/Codec/Platform x 2 */ dlc = devm_kcalloc(&pdev->dev, 6, sizeof(*dlc), GFP_KERNEL); if (!dlc) return -ENOMEM; ret = of_parse_phandle_with_args(audmix_np, "dais", NULL, i, &args); if (ret < 0) { dev_err(&pdev->dev, "of_parse_phandle_with_args failed\n"); return ret; } cpu_pdev = of_find_device_by_node(args.np); if (!cpu_pdev) { dev_err(&pdev->dev, "failed to find SAI platform device\n"); return -EINVAL; } put_device(&cpu_pdev->dev); dai_name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s%s", fe_name_pref, args.np->full_name + 1); if (!dai_name) return -ENOMEM; dev_info(pdev->dev.parent, "DAI FE name:%s\n", dai_name); if (i == 0) { out_cpu_np = args.np; capture_dai_name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s %s", dai_name, "CPU-Capture"); if (!capture_dai_name) return -ENOMEM; } priv->dai[i].cpus = &dlc[0]; priv->dai[i].codecs = &dlc[1]; priv->dai[i].platforms = &dlc[2]; priv->dai[i].num_cpus = 1; priv->dai[i].num_codecs = 1; priv->dai[i].num_platforms = 1; priv->dai[i].name = dai_name; priv->dai[i].stream_name = "HiFi-AUDMIX-FE"; priv->dai[i].codecs->dai_name = "snd-soc-dummy-dai"; priv->dai[i].codecs->name = "snd-soc-dummy"; priv->dai[i].cpus->of_node = args.np; priv->dai[i].cpus->dai_name = dev_name(&cpu_pdev->dev); priv->dai[i].platforms->of_node = args.np; priv->dai[i].dynamic = 1; priv->dai[i].dpcm_playback = 1; priv->dai[i].dpcm_capture = (i == 0 ? 1 : 0); priv->dai[i].ignore_pmdown_time = 1; priv->dai[i].ops = &imx_audmix_fe_ops; /* Add AUDMIX Backend */ be_name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "audmix-%d", i); be_pb = devm_kasprintf(&pdev->dev, GFP_KERNEL, "AUDMIX-Playback-%d", i); be_cp = devm_kasprintf(&pdev->dev, GFP_KERNEL, "AUDMIX-Capture-%d", i); if (!be_name || !be_pb || !be_cp) return -ENOMEM; priv->dai[num_dai + i].cpus = &dlc[3]; priv->dai[num_dai + i].codecs = &dlc[4]; priv->dai[num_dai + i].platforms = &dlc[5]; priv->dai[num_dai + i].num_cpus = 1; priv->dai[num_dai + i].num_codecs = 1; priv->dai[num_dai + i].num_platforms = 1; priv->dai[num_dai + i].name = be_name; priv->dai[num_dai + i].codecs->dai_name = "snd-soc-dummy-dai"; priv->dai[num_dai + i].codecs->name = "snd-soc-dummy"; priv->dai[num_dai + i].cpus->of_node = audmix_np; priv->dai[num_dai + i].cpus->dai_name = be_name; priv->dai[num_dai + i].platforms->name = "snd-soc-dummy"; priv->dai[num_dai + i].no_pcm = 1; priv->dai[num_dai + i].dpcm_playback = 1; priv->dai[num_dai + i].dpcm_capture = 1; priv->dai[num_dai + i].ignore_pmdown_time = 1; priv->dai[num_dai + i].ops = &imx_audmix_be_ops; priv->dai_conf[i].dlc.of_node = args.np; priv->dai_conf[i].name_prefix = dai_name; priv->dapm_routes[i].source = devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s %s", dai_name, "CPU-Playback"); if (!priv->dapm_routes[i].source) return -ENOMEM; priv->dapm_routes[i].sink = be_pb; priv->dapm_routes[num_dai + i].source = be_pb; priv->dapm_routes[num_dai + i].sink = be_cp; priv->dapm_routes[2 * num_dai + i].source = be_cp; priv->dapm_routes[2 * num_dai + i].sink = capture_dai_name; } cpu_pdev = of_find_device_by_node(out_cpu_np); if (!cpu_pdev) { dev_err(&pdev->dev, "failed to find SAI platform device\n"); return -EINVAL; } put_device(&cpu_pdev->dev); priv->cpu_mclk = devm_clk_get(&cpu_pdev->dev, "mclk1"); if (IS_ERR(priv->cpu_mclk)) { ret = PTR_ERR(priv->cpu_mclk); dev_err(&cpu_pdev->dev, "failed to get DAI mclk1: %d\n", ret); return ret; } priv->audmix_pdev = audmix_pdev; priv->out_pdev = cpu_pdev; priv->card.dai_link = priv->dai; priv->card.num_links = priv->num_dai; priv->card.codec_conf = priv->dai_conf; priv->card.num_configs = priv->num_dai_conf; priv->card.dapm_routes = priv->dapm_routes; priv->card.num_dapm_routes = priv->num_dapm_routes; priv->card.dev = &pdev->dev; priv->card.owner = THIS_MODULE; priv->card.name = "imx-audmix"; platform_set_drvdata(pdev, &priv->card); snd_soc_card_set_drvdata(&priv->card, priv); ret = devm_snd_soc_register_card(&pdev->dev, &priv->card); if (ret) { dev_err(&pdev->dev, "snd_soc_register_card failed\n"); return ret; } return ret; } static struct platform_driver imx_audmix_driver = { .probe = imx_audmix_probe, .driver = { .name = "imx-audmix", .pm = &snd_soc_pm_ops, }, }; module_platform_driver(imx_audmix_driver); MODULE_DESCRIPTION("NXP AUDMIX ASoC machine driver"); MODULE_AUTHOR("Viorel Suman "); MODULE_ALIAS("platform:imx-audmix"); MODULE_LICENSE("GPL v2");