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210 lines
5.2 KiB
210 lines
5.2 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* sam9x5_wm8731 -- SoC audio for AT91SAM9X5-based boards |
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* that are using WM8731 as codec. |
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* |
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* Copyright (C) 2011 Atmel, |
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* Nicolas Ferre <[email protected]> |
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* |
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* Copyright (C) 2013 Paratronic, |
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* Richard Genoud <[email protected]> |
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* |
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* Based on sam9g20_wm8731.c by: |
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* Sedji Gaouaou <[email protected]> |
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*/ |
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#include <linux/of.h> |
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#include <linux/export.h> |
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#include <linux/module.h> |
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#include <linux/mod_devicetable.h> |
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#include <linux/platform_device.h> |
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#include <linux/device.h> |
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#include <sound/soc.h> |
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#include <sound/soc-dai.h> |
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#include <sound/soc-dapm.h> |
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#include "../codecs/wm8731.h" |
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#include "atmel_ssc_dai.h" |
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#define MCLK_RATE 12288000 |
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#define DRV_NAME "sam9x5-snd-wm8731" |
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struct sam9x5_drvdata { |
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int ssc_id; |
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}; |
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/* |
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* Logic for a wm8731 as connected on a at91sam9x5ek based board. |
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*/ |
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static int sam9x5_wm8731_init(struct snd_soc_pcm_runtime *rtd) |
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{ |
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struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0); |
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struct device *dev = rtd->dev; |
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int ret; |
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dev_dbg(dev, "%s called\n", __func__); |
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/* set the codec system clock for DAC and ADC */ |
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ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_XTAL, |
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MCLK_RATE, SND_SOC_CLOCK_IN); |
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if (ret < 0) { |
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dev_err(dev, "Failed to set WM8731 SYSCLK: %d\n", ret); |
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return ret; |
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} |
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return 0; |
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} |
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/* |
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* Audio paths on at91sam9x5ek board: |
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* |
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* |A| ------------> | | ---R----> Headphone Jack |
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* |T| <----\ | WM | ---L--/ |
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* |9| ---> CLK <--> | 8731 | <--R----- Line In Jack |
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* |1| <------------ | | <--L--/ |
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*/ |
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static const struct snd_soc_dapm_widget sam9x5_dapm_widgets[] = { |
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SND_SOC_DAPM_HP("Headphone Jack", NULL), |
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SND_SOC_DAPM_LINE("Line In Jack", NULL), |
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}; |
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static int sam9x5_wm8731_driver_probe(struct platform_device *pdev) |
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{ |
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struct device_node *np = pdev->dev.of_node; |
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struct device_node *codec_np, *cpu_np; |
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struct snd_soc_card *card; |
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struct snd_soc_dai_link *dai; |
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struct sam9x5_drvdata *priv; |
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struct snd_soc_dai_link_component *comp; |
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int ret; |
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if (!np) { |
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dev_err(&pdev->dev, "No device node supplied\n"); |
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return -EINVAL; |
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} |
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card = devm_kzalloc(&pdev->dev, sizeof(*card), GFP_KERNEL); |
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priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); |
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dai = devm_kzalloc(&pdev->dev, sizeof(*dai), GFP_KERNEL); |
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comp = devm_kzalloc(&pdev->dev, 3 * sizeof(*comp), GFP_KERNEL); |
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if (!dai || !card || !priv || !comp) { |
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ret = -ENOMEM; |
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goto out; |
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} |
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snd_soc_card_set_drvdata(card, priv); |
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card->dev = &pdev->dev; |
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card->owner = THIS_MODULE; |
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card->dai_link = dai; |
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card->num_links = 1; |
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card->dapm_widgets = sam9x5_dapm_widgets; |
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card->num_dapm_widgets = ARRAY_SIZE(sam9x5_dapm_widgets); |
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dai->cpus = &comp[0]; |
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dai->num_cpus = 1; |
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dai->codecs = &comp[1]; |
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dai->num_codecs = 1; |
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dai->platforms = &comp[2]; |
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dai->num_platforms = 1; |
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dai->name = "WM8731"; |
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dai->stream_name = "WM8731 PCM"; |
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dai->codecs->dai_name = "wm8731-hifi"; |
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dai->init = sam9x5_wm8731_init; |
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dai->dai_fmt = SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_NB_NF |
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| SND_SOC_DAIFMT_CBM_CFM; |
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ret = snd_soc_of_parse_card_name(card, "atmel,model"); |
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if (ret) { |
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dev_err(&pdev->dev, "atmel,model node missing\n"); |
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goto out; |
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} |
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ret = snd_soc_of_parse_audio_routing(card, "atmel,audio-routing"); |
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if (ret) { |
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dev_err(&pdev->dev, "atmel,audio-routing node missing\n"); |
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goto out; |
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} |
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codec_np = of_parse_phandle(np, "atmel,audio-codec", 0); |
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if (!codec_np) { |
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dev_err(&pdev->dev, "atmel,audio-codec node missing\n"); |
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ret = -EINVAL; |
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goto out; |
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} |
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dai->codecs->of_node = codec_np; |
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cpu_np = of_parse_phandle(np, "atmel,ssc-controller", 0); |
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if (!cpu_np) { |
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dev_err(&pdev->dev, "atmel,ssc-controller node missing\n"); |
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ret = -EINVAL; |
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goto out; |
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} |
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dai->cpus->of_node = cpu_np; |
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dai->platforms->of_node = cpu_np; |
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priv->ssc_id = of_alias_get_id(cpu_np, "ssc"); |
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ret = atmel_ssc_set_audio(priv->ssc_id); |
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if (ret != 0) { |
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dev_err(&pdev->dev, "Failed to set SSC %d for audio: %d\n", |
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ret, priv->ssc_id); |
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goto out; |
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} |
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of_node_put(codec_np); |
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of_node_put(cpu_np); |
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ret = snd_soc_register_card(card); |
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if (ret) { |
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dev_err(&pdev->dev, "Platform device allocation failed\n"); |
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goto out_put_audio; |
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} |
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dev_dbg(&pdev->dev, "%s ok\n", __func__); |
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return ret; |
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out_put_audio: |
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atmel_ssc_put_audio(priv->ssc_id); |
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out: |
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return ret; |
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} |
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static int sam9x5_wm8731_driver_remove(struct platform_device *pdev) |
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{ |
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struct snd_soc_card *card = platform_get_drvdata(pdev); |
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struct sam9x5_drvdata *priv = card->drvdata; |
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snd_soc_unregister_card(card); |
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atmel_ssc_put_audio(priv->ssc_id); |
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return 0; |
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} |
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static const struct of_device_id sam9x5_wm8731_of_match[] = { |
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{ .compatible = "atmel,sam9x5-wm8731-audio", }, |
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{}, |
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}; |
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MODULE_DEVICE_TABLE(of, sam9x5_wm8731_of_match); |
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static struct platform_driver sam9x5_wm8731_driver = { |
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.driver = { |
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.name = DRV_NAME, |
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.of_match_table = of_match_ptr(sam9x5_wm8731_of_match), |
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}, |
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.probe = sam9x5_wm8731_driver_probe, |
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.remove = sam9x5_wm8731_driver_remove, |
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}; |
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module_platform_driver(sam9x5_wm8731_driver); |
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/* Module information */ |
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MODULE_AUTHOR("Nicolas Ferre <[email protected]>"); |
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MODULE_AUTHOR("Richard Genoud <[email protected]>"); |
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MODULE_DESCRIPTION("ALSA SoC machine driver for AT91SAM9x5 - WM8731"); |
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MODULE_LICENSE("GPL"); |
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MODULE_ALIAS("platform:" DRV_NAME);
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