![Bo Shen](/assets/img/avatar_default.png)
Signed-off-by: Bo Shen <voice.shen@atmel.com> Signed-off-by: Mark Brown <broonie@linaro.org>
197 lines
4.8 KiB
C
197 lines
4.8 KiB
C
/*
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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 <voice.shen@atmel.com>
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*
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* GPLv2 or later
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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 = substream->private_data;
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struct snd_soc_dai *codec_dai = rtd->codec_dai;
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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 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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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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.codec_dai_name = "wm8904-hifi",
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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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};
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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->cpu_of_node = cpu_np;
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dailink->platform_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->codec_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->cpu_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->cpu_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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#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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.owner = THIS_MODULE,
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.of_match_table = of_match_ptr(atmel_asoc_wm8904_dt_ids),
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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 <voice.shen@atmel.com>");
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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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