| // 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: |
| * |
| * http://www.opensource.org/licenses/gpl-license.html |
| * http://www.gnu.org/copyleft/gpl.html |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/of_platform.h> |
| #include <linux/clk.h> |
| #include <sound/soc.h> |
| #include <sound/soc-dapm.h> |
| #include <linux/pm_runtime.h> |
| #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 = substream->private_data; |
| 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 = substream->private_data; |
| 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 = substream->private_data; |
| 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_kzalloc(&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_kzalloc(&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_kzalloc(&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_kzalloc(&pdev->dev, 6 * sizeof(*dlc), GFP_KERNEL); |
| if (!dlc) { |
| dev_err(&pdev->dev, "failed to allocate dai_link\n"); |
| 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); |
| |
| 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"); |
| } |
| |
| 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); |
| |
| 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"); |
| 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 -EINVAL; |
| } |
| |
| 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 <viorel.suman@nxp.com>"); |
| MODULE_ALIAS("platform:imx-audmix"); |
| MODULE_LICENSE("GPL v2"); |