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201 lines
5.0 KiB
201 lines
5.0 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* atmel_wm8904 - Atmel ASoC driver for boards with WM8904 codec. |
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* |
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* Copyright (C) 2012 Atmel |
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* |
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* Author: Bo Shen <[email protected]> |
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*/ |
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#include <linux/clk.h> |
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#include <linux/module.h> |
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#include <linux/of.h> |
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#include <linux/of_device.h> |
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#include <sound/soc.h> |
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#include "../codecs/wm8904.h" |
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#include "atmel_ssc_dai.h" |
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static const struct snd_soc_dapm_widget atmel_asoc_wm8904_dapm_widgets[] = { |
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SND_SOC_DAPM_HP("Headphone Jack", NULL), |
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SND_SOC_DAPM_MIC("Mic", NULL), |
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SND_SOC_DAPM_LINE("Line In Jack", NULL), |
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}; |
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static int atmel_asoc_wm8904_hw_params(struct snd_pcm_substream *substream, |
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struct snd_pcm_hw_params *params) |
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{ |
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struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); |
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struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0); |
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int ret; |
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ret = snd_soc_dai_set_pll(codec_dai, WM8904_FLL_MCLK, WM8904_FLL_MCLK, |
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32768, params_rate(params) * 256); |
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if (ret < 0) { |
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pr_err("%s - failed to set wm8904 codec PLL.", __func__); |
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return ret; |
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} |
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/* |
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* As here wm8904 use FLL output as its system clock |
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* so calling set_sysclk won't care freq parameter |
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* then we pass 0 |
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*/ |
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ret = snd_soc_dai_set_sysclk(codec_dai, WM8904_CLK_FLL, |
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0, SND_SOC_CLOCK_IN); |
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if (ret < 0) { |
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pr_err("%s -failed to set wm8904 SYSCLK\n", __func__); |
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return ret; |
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} |
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return 0; |
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} |
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static const struct snd_soc_ops atmel_asoc_wm8904_ops = { |
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.hw_params = atmel_asoc_wm8904_hw_params, |
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}; |
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SND_SOC_DAILINK_DEFS(pcm, |
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DAILINK_COMP_ARRAY(COMP_EMPTY()), |
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DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "wm8904-hifi")), |
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DAILINK_COMP_ARRAY(COMP_EMPTY())); |
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static struct snd_soc_dai_link atmel_asoc_wm8904_dailink = { |
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.name = "WM8904", |
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.stream_name = "WM8904 PCM", |
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.dai_fmt = SND_SOC_DAIFMT_I2S |
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| SND_SOC_DAIFMT_NB_NF |
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| SND_SOC_DAIFMT_CBM_CFM, |
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.ops = &atmel_asoc_wm8904_ops, |
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SND_SOC_DAILINK_REG(pcm), |
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}; |
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static struct snd_soc_card atmel_asoc_wm8904_card = { |
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.name = "atmel_asoc_wm8904", |
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.owner = THIS_MODULE, |
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.dai_link = &atmel_asoc_wm8904_dailink, |
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.num_links = 1, |
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.dapm_widgets = atmel_asoc_wm8904_dapm_widgets, |
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.num_dapm_widgets = ARRAY_SIZE(atmel_asoc_wm8904_dapm_widgets), |
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.fully_routed = true, |
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}; |
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static int atmel_asoc_wm8904_dt_init(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 = &atmel_asoc_wm8904_card; |
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struct snd_soc_dai_link *dailink = &atmel_asoc_wm8904_dailink; |
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int ret; |
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if (!np) { |
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dev_err(&pdev->dev, "only device tree supported\n"); |
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return -EINVAL; |
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} |
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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, "failed to parse card name\n"); |
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return ret; |
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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, "failed to parse audio routing\n"); |
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return ret; |
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} |
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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, "failed to get dai and pcm info\n"); |
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ret = -EINVAL; |
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return ret; |
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} |
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dailink->cpus->of_node = cpu_np; |
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dailink->platforms->of_node = cpu_np; |
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of_node_put(cpu_np); |
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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, "failed to get codec info\n"); |
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ret = -EINVAL; |
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return ret; |
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} |
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dailink->codecs->of_node = codec_np; |
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of_node_put(codec_np); |
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return 0; |
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} |
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static int atmel_asoc_wm8904_probe(struct platform_device *pdev) |
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{ |
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struct snd_soc_card *card = &atmel_asoc_wm8904_card; |
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struct snd_soc_dai_link *dailink = &atmel_asoc_wm8904_dailink; |
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int id, ret; |
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card->dev = &pdev->dev; |
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ret = atmel_asoc_wm8904_dt_init(pdev); |
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if (ret) { |
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dev_err(&pdev->dev, "failed to init dt info\n"); |
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return ret; |
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} |
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id = of_alias_get_id((struct device_node *)dailink->cpus->of_node, "ssc"); |
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ret = atmel_ssc_set_audio(id); |
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if (ret != 0) { |
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dev_err(&pdev->dev, "failed to set SSC %d for audio\n", id); |
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return ret; |
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} |
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ret = snd_soc_register_card(card); |
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if (ret) { |
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dev_err(&pdev->dev, "snd_soc_register_card failed\n"); |
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goto err_set_audio; |
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} |
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return 0; |
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err_set_audio: |
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atmel_ssc_put_audio(id); |
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return ret; |
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} |
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static int atmel_asoc_wm8904_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 snd_soc_dai_link *dailink = &atmel_asoc_wm8904_dailink; |
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int id; |
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id = of_alias_get_id((struct device_node *)dailink->cpus->of_node, "ssc"); |
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snd_soc_unregister_card(card); |
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atmel_ssc_put_audio(id); |
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return 0; |
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} |
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#ifdef CONFIG_OF |
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static const struct of_device_id atmel_asoc_wm8904_dt_ids[] = { |
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{ .compatible = "atmel,asoc-wm8904", }, |
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{ } |
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}; |
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MODULE_DEVICE_TABLE(of, atmel_asoc_wm8904_dt_ids); |
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#endif |
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static struct platform_driver atmel_asoc_wm8904_driver = { |
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.driver = { |
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.name = "atmel-wm8904-audio", |
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.of_match_table = of_match_ptr(atmel_asoc_wm8904_dt_ids), |
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.pm = &snd_soc_pm_ops, |
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}, |
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.probe = atmel_asoc_wm8904_probe, |
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.remove = atmel_asoc_wm8904_remove, |
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}; |
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module_platform_driver(atmel_asoc_wm8904_driver); |
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/* Module information */ |
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MODULE_AUTHOR("Bo Shen <[email protected]>"); |
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MODULE_DESCRIPTION("ALSA SoC machine driver for Atmel EK with WM8904 codec"); |
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MODULE_LICENSE("GPL");
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