292 lines
7.3 KiB
C
292 lines
7.3 KiB
C
/*
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* Copyright 2012, 2014-2016 Freescale Semiconductor, Inc.
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* Copyright 2012 Linaro Ltd.
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*
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* The code contained herein is licensed under the GNU General Public
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* License. You may obtain a copy of the GNU General Public License
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* Version 2 or later at the following locations:
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*
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* http://www.opensource.org/licenses/gpl-license.html
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* http://www.gnu.org/copyleft/gpl.html
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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_platform.h>
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#include <sound/soc.h>
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#include <sound/pcm_params.h>
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#define SUPPORT_RATE_NUM 10
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struct imx_priv {
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struct clk *codec_clk;
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unsigned int mclk_freq;
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struct platform_device *pdev;
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struct platform_device *asrc_pdev;
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u32 asrc_rate;
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u32 asrc_format;
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};
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static struct imx_priv card_priv;
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static int imx_mqs_startup(struct snd_pcm_substream *substream)
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{
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struct snd_pcm_runtime *runtime = substream->runtime;
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static struct snd_pcm_hw_constraint_list constraint_rates;
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struct imx_priv *priv = &card_priv;
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struct device *dev = &priv->pdev->dev;
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static u32 support_rates[SUPPORT_RATE_NUM];
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int ret;
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priv->mclk_freq = clk_get_rate(priv->codec_clk);
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if (priv->mclk_freq % 24576000 == 0) {
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support_rates[0] = 48000;
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constraint_rates.list = support_rates;
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constraint_rates.count = 1;
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ret = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
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&constraint_rates);
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if (ret)
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return ret;
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} else
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dev_warn(dev, "mclk may be not supported %d\n", priv->mclk_freq);
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return 0;
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}
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static int imx_mqs_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 *cpu_dai = rtd->cpu_dai;
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struct snd_soc_card *card = rtd->card;
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int ret;
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ret = snd_soc_dai_set_tdm_slot(cpu_dai, 0, 0, 2, params_width(params));
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if (ret) {
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dev_err(card->dev, "failed to set cpu dai tdm slot: %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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static struct snd_soc_ops imx_mqs_ops = {
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.startup = imx_mqs_startup,
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.hw_params = imx_mqs_hw_params,
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};
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static struct snd_soc_ops imx_mqs_ops_be = {
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.hw_params = imx_mqs_hw_params,
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};
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static const struct snd_soc_dapm_route audio_map[] = {
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{"CPU-Playback", NULL, "ASRC-Playback"},
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{"Playback", NULL, "CPU-Playback"},/* dai route for be and fe */
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};
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static int be_hw_params_fixup(struct snd_soc_pcm_runtime *rtd,
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struct snd_pcm_hw_params *params) {
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struct imx_priv *priv = &card_priv;
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struct snd_interval *rate;
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struct snd_mask *mask;
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if (!priv->asrc_pdev)
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return -EINVAL;
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rate = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
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rate->max = rate->min = priv->asrc_rate;
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mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
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snd_mask_none(mask);
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snd_mask_set(mask, priv->asrc_format);
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return 0;
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}
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SND_SOC_DAILINK_DEFS(hifi,
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DAILINK_COMP_ARRAY(COMP_EMPTY()),
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DAILINK_COMP_ARRAY(COMP_EMPTY()),
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DAILINK_COMP_ARRAY(COMP_EMPTY()));
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SND_SOC_DAILINK_DEFS(hifi_fe,
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DAILINK_COMP_ARRAY(COMP_EMPTY()),
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DAILINK_COMP_ARRAY(COMP_DUMMY()),
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DAILINK_COMP_ARRAY(COMP_EMPTY()));
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SND_SOC_DAILINK_DEFS(hifi_be,
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DAILINK_COMP_ARRAY(COMP_EMPTY()),
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DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "fsl-mqs-dai")),
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DAILINK_COMP_ARRAY(COMP_DUMMY()));
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static struct snd_soc_dai_link imx_mqs_dai[] = {
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{
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.name = "HiFi",
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.stream_name = "HiFi",
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.dai_fmt = SND_SOC_DAIFMT_LEFT_J | SND_SOC_DAIFMT_NB_NF |
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SND_SOC_DAIFMT_CBS_CFS,
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.ops = &imx_mqs_ops,
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SND_SOC_DAILINK_REG(hifi),
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},
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{
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.name = "HiFi-ASRC-FE",
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.stream_name = "HiFi-ASRC-FE",
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.dynamic = 1,
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.ignore_pmdown_time = 1,
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.dpcm_playback = 1,
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.dpcm_capture = 0,
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.dpcm_merged_chan = 1,
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SND_SOC_DAILINK_REG(hifi_fe),
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},
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{
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.name = "HiFi-ASRC-BE",
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.stream_name = "HiFi-ASRC-BE",
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.dai_fmt = SND_SOC_DAIFMT_LEFT_J | SND_SOC_DAIFMT_NB_NF |
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SND_SOC_DAIFMT_CBS_CFS,
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.no_pcm = 1,
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.ignore_pmdown_time = 1,
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.dpcm_playback = 1,
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.dpcm_capture = 0,
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.ops = &imx_mqs_ops_be,
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.be_hw_params_fixup = be_hw_params_fixup,
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SND_SOC_DAILINK_REG(hifi_be),
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},
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};
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static struct snd_soc_card snd_soc_card_imx_mqs = {
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.name = "mqs-audio",
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.dai_link = imx_mqs_dai,
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.owner = THIS_MODULE,
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.dapm_routes = audio_map,
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.num_dapm_routes = ARRAY_SIZE(audio_map),
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};
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static int imx_mqs_probe(struct platform_device *pdev)
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{
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struct device_node *cpu_np, *codec_np;
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struct imx_priv *priv = &card_priv;
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struct platform_device *codec_dev;
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struct platform_device *asrc_pdev = NULL;
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struct platform_device *cpu_pdev;
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struct device_node *asrc_np;
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int ret;
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u32 width;
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priv->pdev = pdev;
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cpu_np = of_parse_phandle(pdev->dev.of_node, "cpu-dai", 0);
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if (!cpu_np) {
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ret = -EINVAL;
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goto fail;
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}
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cpu_pdev = of_find_device_by_node(cpu_np);
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if (!cpu_pdev) {
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dev_err(&pdev->dev, "failed to find cpu dai device\n");
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ret = -EINVAL;
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goto fail;
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}
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asrc_np = of_parse_phandle(pdev->dev.of_node, "asrc-controller", 0);
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if (asrc_np) {
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asrc_pdev = of_find_device_by_node(asrc_np);
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priv->asrc_pdev = asrc_pdev;
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}
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codec_np = of_parse_phandle(pdev->dev.of_node, "audio-codec", 0);
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if (!codec_np) {
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dev_err(&pdev->dev, "phandle missing or invalid\n");
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ret = -EINVAL;
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goto fail;
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}
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codec_dev = of_find_device_by_node(codec_np);
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if (!codec_dev) {
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dev_err(&codec_dev->dev, "failed to find codec device\n");
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ret = -EINVAL;
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goto fail;
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}
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priv->codec_clk = devm_clk_get(&codec_dev->dev, "mclk");
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if (IS_ERR(priv->codec_clk)) {
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ret = PTR_ERR(priv->codec_clk);
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dev_err(&codec_dev->dev, "failed to get codec clk: %d\n", ret);
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goto fail;
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}
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imx_mqs_dai[0].codecs->dai_name = "fsl-mqs-dai";
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if (!asrc_pdev) {
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imx_mqs_dai[0].codecs->of_node = codec_np;
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imx_mqs_dai[0].cpus->dai_name = dev_name(&cpu_pdev->dev);
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imx_mqs_dai[0].platforms->of_node = cpu_np;
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snd_soc_card_imx_mqs.num_links = 1;
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} else {
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imx_mqs_dai[0].codecs->of_node = codec_np;
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imx_mqs_dai[0].cpus->dai_name = dev_name(&cpu_pdev->dev);
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imx_mqs_dai[0].platforms->of_node = cpu_np;
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imx_mqs_dai[1].cpus->of_node = asrc_np;
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imx_mqs_dai[1].platforms->of_node = asrc_np;
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imx_mqs_dai[2].codecs->of_node = codec_np;
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imx_mqs_dai[2].cpus->dai_name = dev_name(&cpu_pdev->dev);
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snd_soc_card_imx_mqs.num_links = 3;
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ret = of_property_read_u32(asrc_np, "fsl,asrc-rate",
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&priv->asrc_rate);
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if (ret) {
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dev_err(&pdev->dev, "failed to get output rate\n");
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ret = -EINVAL;
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goto fail;
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}
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ret = of_property_read_u32(asrc_np, "fsl,asrc-width", &width);
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if (ret) {
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dev_err(&pdev->dev, "failed to get output rate\n");
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ret = -EINVAL;
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goto fail;
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}
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if (width == 24)
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priv->asrc_format = SNDRV_PCM_FORMAT_S24_LE;
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else
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priv->asrc_format = SNDRV_PCM_FORMAT_S16_LE;
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}
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snd_soc_card_imx_mqs.dev = &pdev->dev;
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ret = devm_snd_soc_register_card(&pdev->dev, &snd_soc_card_imx_mqs);
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if (ret) {
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dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
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goto fail;
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}
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fail:
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if (cpu_np)
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of_node_put(cpu_np);
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return ret;
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}
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static const struct of_device_id imx_mqs_dt_ids[] = {
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{ .compatible = "fsl,imx-audio-mqs", },
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{ /* sentinel */ }
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};
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MODULE_DEVICE_TABLE(of, imx_mqs_dt_ids);
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static struct platform_driver imx_mqs_driver = {
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.driver = {
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.name = "imx-mqs",
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.pm = &snd_soc_pm_ops,
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.of_match_table = imx_mqs_dt_ids,
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},
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.probe = imx_mqs_probe,
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};
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module_platform_driver(imx_mqs_driver);
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MODULE_AUTHOR("Nicolin Chen <Guangyu.Chen@freescale.com>");
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MODULE_DESCRIPTION("Freescale i.MX MQS ASoC machine driver");
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MODULE_ALIAS("platform:imx-mqs");
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MODULE_LICENSE("GPL v2");
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