// SPDX-License-Identifier: GPL-2.0-only /* * ASoC driver for TI DAVINCI EVM platform * * Author: Vladimir Barinov, * Copyright: (C) 2007 MontaVista Software, Inc., */ #include #include #include #include #include #include #include #include #include #include #include #include #include struct snd_soc_card_drvdata_davinci { struct clk *mclk; unsigned sysclk; }; static int evm_startup(struct snd_pcm_substream *substream) { struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); struct snd_soc_card *soc_card = rtd->card; struct snd_soc_card_drvdata_davinci *drvdata = snd_soc_card_get_drvdata(soc_card); if (drvdata->mclk) return clk_prepare_enable(drvdata->mclk); return 0; } static void evm_shutdown(struct snd_pcm_substream *substream) { struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); struct snd_soc_card *soc_card = rtd->card; struct snd_soc_card_drvdata_davinci *drvdata = snd_soc_card_get_drvdata(soc_card); clk_disable_unprepare(drvdata->mclk); } static int evm_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params) { struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0); struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0); struct snd_soc_card *soc_card = rtd->card; int ret = 0; unsigned sysclk = ((struct snd_soc_card_drvdata_davinci *) snd_soc_card_get_drvdata(soc_card))->sysclk; /* set the codec system clock */ ret = snd_soc_dai_set_sysclk(codec_dai, 0, sysclk, SND_SOC_CLOCK_OUT); if (ret < 0) return ret; /* set the CPU system clock */ ret = snd_soc_dai_set_sysclk(cpu_dai, 0, sysclk, SND_SOC_CLOCK_OUT); if (ret < 0 && ret != -ENOTSUPP) return ret; return 0; } static const struct snd_soc_ops evm_ops = { .startup = evm_startup, .shutdown = evm_shutdown, .hw_params = evm_hw_params, }; /* davinci-evm machine dapm widgets */ static const struct snd_soc_dapm_widget aic3x_dapm_widgets[] = { SND_SOC_DAPM_HP("Headphone Jack", NULL), SND_SOC_DAPM_LINE("Line Out", NULL), SND_SOC_DAPM_MIC("Mic Jack", NULL), SND_SOC_DAPM_LINE("Line In", NULL), }; /* davinci-evm machine audio_mapnections to the codec pins */ static const struct snd_soc_dapm_route audio_map[] = { /* Headphone connected to HPLOUT, HPROUT */ {"Headphone Jack", NULL, "HPLOUT"}, {"Headphone Jack", NULL, "HPROUT"}, /* Line Out connected to LLOUT, RLOUT */ {"Line Out", NULL, "LLOUT"}, {"Line Out", NULL, "RLOUT"}, /* Mic connected to (MIC3L | MIC3R) */ {"MIC3L", NULL, "Mic Bias"}, {"MIC3R", NULL, "Mic Bias"}, {"Mic Bias", NULL, "Mic Jack"}, /* Line In connected to (LINE1L | LINE2L), (LINE1R | LINE2R) */ {"LINE1L", NULL, "Line In"}, {"LINE2L", NULL, "Line In"}, {"LINE1R", NULL, "Line In"}, {"LINE2R", NULL, "Line In"}, }; /* Logic for a aic3x as connected on a davinci-evm */ static int evm_aic3x_init(struct snd_soc_pcm_runtime *rtd) { struct snd_soc_card *card = rtd->card; struct device_node *np = card->dev->of_node; int ret; /* Add davinci-evm specific widgets */ snd_soc_dapm_new_controls(&card->dapm, aic3x_dapm_widgets, ARRAY_SIZE(aic3x_dapm_widgets)); if (np) { ret = snd_soc_of_parse_audio_routing(card, "ti,audio-routing"); if (ret) return ret; } else { /* Set up davinci-evm specific audio path audio_map */ snd_soc_dapm_add_routes(&card->dapm, audio_map, ARRAY_SIZE(audio_map)); } /* not connected */ snd_soc_dapm_nc_pin(&card->dapm, "MONO_LOUT"); snd_soc_dapm_nc_pin(&card->dapm, "HPLCOM"); snd_soc_dapm_nc_pin(&card->dapm, "HPRCOM"); return 0; } /* * The struct is used as place holder. It will be completely * filled with data from dt node. */ SND_SOC_DAILINK_DEFS(evm, DAILINK_COMP_ARRAY(COMP_EMPTY()), DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "tlv320aic3x-hifi")), DAILINK_COMP_ARRAY(COMP_EMPTY())); static struct snd_soc_dai_link evm_dai_tlv320aic3x = { .name = "TLV320AIC3X", .stream_name = "AIC3X", .ops = &evm_ops, .init = evm_aic3x_init, .dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_CBM_CFM | SND_SOC_DAIFMT_IB_NF, SND_SOC_DAILINK_REG(evm), }; static const struct of_device_id davinci_evm_dt_ids[] = { { .compatible = "ti,da830-evm-audio", .data = (void *) &evm_dai_tlv320aic3x, }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(of, davinci_evm_dt_ids); /* davinci evm audio machine driver */ static struct snd_soc_card evm_soc_card = { .owner = THIS_MODULE, .num_links = 1, }; static int davinci_evm_probe(struct platform_device *pdev) { struct device_node *np = pdev->dev.of_node; struct snd_soc_dai_link *dai; struct snd_soc_card_drvdata_davinci *drvdata = NULL; struct clk *mclk; int ret = 0; dai = (struct snd_soc_dai_link *) device_get_match_data(&pdev->dev); if (!dai) { dev_err(&pdev->dev, "Error: No device match found\n"); return -ENODEV; } evm_soc_card.dai_link = dai; dai->codecs->of_node = of_parse_phandle(np, "ti,audio-codec", 0); if (!dai->codecs->of_node) return -EINVAL; dai->cpus->of_node = of_parse_phandle(np, "ti,mcasp-controller", 0); if (!dai->cpus->of_node) return -EINVAL; dai->platforms->of_node = dai->cpus->of_node; evm_soc_card.dev = &pdev->dev; ret = snd_soc_of_parse_card_name(&evm_soc_card, "ti,model"); if (ret) return ret; mclk = devm_clk_get(&pdev->dev, "mclk"); if (PTR_ERR(mclk) == -EPROBE_DEFER) { return -EPROBE_DEFER; } else if (IS_ERR(mclk)) { dev_dbg(&pdev->dev, "mclk not found.\n"); mclk = NULL; } drvdata = devm_kzalloc(&pdev->dev, sizeof(*drvdata), GFP_KERNEL); if (!drvdata) return -ENOMEM; drvdata->mclk = mclk; ret = of_property_read_u32(np, "ti,codec-clock-rate", &drvdata->sysclk); if (ret < 0) { if (!drvdata->mclk) { dev_err(&pdev->dev, "No clock or clock rate defined.\n"); return -EINVAL; } drvdata->sysclk = clk_get_rate(drvdata->mclk); } else if (drvdata->mclk) { unsigned int requestd_rate = drvdata->sysclk; clk_set_rate(drvdata->mclk, drvdata->sysclk); drvdata->sysclk = clk_get_rate(drvdata->mclk); if (drvdata->sysclk != requestd_rate) dev_warn(&pdev->dev, "Could not get requested rate %u using %u.\n", requestd_rate, drvdata->sysclk); } snd_soc_card_set_drvdata(&evm_soc_card, drvdata); ret = devm_snd_soc_register_card(&pdev->dev, &evm_soc_card); if (ret) dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret); return ret; } static struct platform_driver davinci_evm_driver = { .probe = davinci_evm_probe, .driver = { .name = "davinci_evm", .pm = &snd_soc_pm_ops, .of_match_table = davinci_evm_dt_ids, }, }; module_platform_driver(davinci_evm_driver); MODULE_AUTHOR("Vladimir Barinov"); MODULE_DESCRIPTION("TI DAVINCI EVM ASoC driver"); MODULE_LICENSE("GPL");