368 lines
8.9 KiB
C
368 lines
8.9 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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//
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// Copyright (C) 2017 Samsung Electronics Co., Ltd.
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#include <linux/clk.h>
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#include <linux/clk-provider.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <linux/module.h>
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#include <sound/soc.h>
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#include <sound/pcm_params.h>
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#include "i2s.h"
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#include "i2s-regs.h"
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struct odroid_priv {
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struct snd_soc_card card;
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struct clk *clk_i2s_bus;
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struct clk *sclk_i2s;
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/* Spinlock protecting fields below */
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spinlock_t lock;
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unsigned int be_sample_rate;
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bool be_active;
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};
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static int odroid_card_fe_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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snd_pcm_hw_constraint_single(runtime, SNDRV_PCM_HW_PARAM_CHANNELS, 2);
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return 0;
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}
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static int odroid_card_fe_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 odroid_priv *priv = snd_soc_card_get_drvdata(rtd->card);
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unsigned long flags;
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int ret = 0;
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spin_lock_irqsave(&priv->lock, flags);
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if (priv->be_active && priv->be_sample_rate != params_rate(params))
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ret = -EINVAL;
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spin_unlock_irqrestore(&priv->lock, flags);
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return ret;
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}
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static const struct snd_soc_ops odroid_card_fe_ops = {
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.startup = odroid_card_fe_startup,
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.hw_params = odroid_card_fe_hw_params,
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};
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static int odroid_card_be_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 odroid_priv *priv = snd_soc_card_get_drvdata(rtd->card);
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unsigned int pll_freq, rclk_freq, rfs;
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unsigned long flags;
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int ret;
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switch (params_rate(params)) {
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case 64000:
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pll_freq = 196608001U;
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rfs = 384;
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break;
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case 44100:
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case 88200:
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pll_freq = 180633609U;
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rfs = 512;
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break;
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case 32000:
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case 48000:
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case 96000:
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pll_freq = 196608001U;
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rfs = 512;
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break;
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default:
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return -EINVAL;
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}
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ret = clk_set_rate(priv->clk_i2s_bus, pll_freq / 2 + 1);
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if (ret < 0)
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return ret;
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/*
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* We add 2 to the rclk_freq value in order to avoid too low clock
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* frequency values due to the EPLL output frequency not being exact
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* multiple of the audio sampling rate.
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*/
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rclk_freq = params_rate(params) * rfs + 2;
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ret = clk_set_rate(priv->sclk_i2s, rclk_freq);
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if (ret < 0)
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return ret;
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if (rtd->dai_link->num_codecs > 1) {
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struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 1);
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ret = snd_soc_dai_set_sysclk(codec_dai, 0, rclk_freq,
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SND_SOC_CLOCK_IN);
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if (ret < 0)
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return ret;
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}
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spin_lock_irqsave(&priv->lock, flags);
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priv->be_sample_rate = params_rate(params);
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spin_unlock_irqrestore(&priv->lock, flags);
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return 0;
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}
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static int odroid_card_be_trigger(struct snd_pcm_substream *substream, int cmd)
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{
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struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
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struct odroid_priv *priv = snd_soc_card_get_drvdata(rtd->card);
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unsigned long flags;
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spin_lock_irqsave(&priv->lock, flags);
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switch (cmd) {
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case SNDRV_PCM_TRIGGER_START:
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case SNDRV_PCM_TRIGGER_RESUME:
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case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
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priv->be_active = true;
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break;
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case SNDRV_PCM_TRIGGER_STOP:
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case SNDRV_PCM_TRIGGER_SUSPEND:
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case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
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priv->be_active = false;
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break;
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}
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spin_unlock_irqrestore(&priv->lock, flags);
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return 0;
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}
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static const struct snd_soc_ops odroid_card_be_ops = {
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.hw_params = odroid_card_be_hw_params,
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.trigger = odroid_card_be_trigger,
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};
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/* DAPM routes for backward compatibility with old DTS */
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static const struct snd_soc_dapm_route odroid_dapm_routes[] = {
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{ "I2S Playback", NULL, "Mixer DAI TX" },
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{ "HiFi Playback", NULL, "Mixer DAI TX" },
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};
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SND_SOC_DAILINK_DEFS(primary,
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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_PLATFORM("3830000.i2s")));
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SND_SOC_DAILINK_DEFS(mixer,
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DAILINK_COMP_ARRAY(COMP_DUMMY()),
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DAILINK_COMP_ARRAY(COMP_EMPTY()),
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DAILINK_COMP_ARRAY(COMP_DUMMY()));
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SND_SOC_DAILINK_DEFS(secondary,
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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_PLATFORM("3830000.i2s-sec")));
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static struct snd_soc_dai_link odroid_card_dais[] = {
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{
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/* Primary FE <-> BE link */
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.ops = &odroid_card_fe_ops,
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.name = "Primary",
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.stream_name = "Primary",
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.dynamic = 1,
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.dpcm_playback = 1,
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SND_SOC_DAILINK_REG(primary),
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}, {
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/* BE <-> CODECs link */
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.name = "I2S Mixer",
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.ops = &odroid_card_be_ops,
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.no_pcm = 1,
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.dpcm_playback = 1,
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.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
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SND_SOC_DAIFMT_CBS_CFS,
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SND_SOC_DAILINK_REG(mixer),
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}, {
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/* Secondary FE <-> BE link */
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.playback_only = 1,
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.ops = &odroid_card_fe_ops,
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.name = "Secondary",
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.stream_name = "Secondary",
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.dynamic = 1,
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.dpcm_playback = 1,
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SND_SOC_DAILINK_REG(secondary),
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}
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};
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static int odroid_audio_probe(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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struct device_node *cpu_dai = NULL;
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struct device_node *cpu, *codec;
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struct odroid_priv *priv;
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struct snd_soc_card *card;
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struct snd_soc_dai_link *link, *codec_link;
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int num_pcms, ret, i;
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struct of_phandle_args args = {};
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priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
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if (!priv)
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return -ENOMEM;
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card = &priv->card;
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card->dev = dev;
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card->owner = THIS_MODULE;
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card->fully_routed = true;
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spin_lock_init(&priv->lock);
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snd_soc_card_set_drvdata(card, priv);
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ret = snd_soc_of_parse_card_name(card, "model");
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if (ret < 0)
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return ret;
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if (of_property_read_bool(dev->of_node, "samsung,audio-widgets")) {
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ret = snd_soc_of_parse_audio_simple_widgets(card,
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"samsung,audio-widgets");
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if (ret < 0)
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return ret;
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}
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if (of_property_read_bool(dev->of_node, "samsung,audio-routing")) {
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ret = snd_soc_of_parse_audio_routing(card,
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"samsung,audio-routing");
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if (ret < 0)
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return ret;
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}
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card->dai_link = odroid_card_dais;
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card->num_links = ARRAY_SIZE(odroid_card_dais);
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cpu = of_get_child_by_name(dev->of_node, "cpu");
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codec = of_get_child_by_name(dev->of_node, "codec");
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link = card->dai_link;
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codec_link = &card->dai_link[1];
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/*
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* For backwards compatibility create the secondary CPU DAI link only
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* if there are 2 CPU DAI entries in the cpu sound-dai property in DT.
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* Also add required DAPM routes not available in old DTS.
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*/
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num_pcms = of_count_phandle_with_args(cpu, "sound-dai",
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"#sound-dai-cells");
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if (num_pcms == 1) {
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card->dapm_routes = odroid_dapm_routes;
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card->num_dapm_routes = ARRAY_SIZE(odroid_dapm_routes);
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card->num_links--;
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}
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for (i = 0; i < num_pcms; i++, link += 2) {
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ret = of_parse_phandle_with_args(cpu, "sound-dai",
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"#sound-dai-cells", i, &args);
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if (ret < 0)
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break;
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if (!args.np) {
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dev_err(dev, "sound-dai property parse error: %d\n", ret);
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ret = -EINVAL;
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break;
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}
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ret = snd_soc_get_dai_name(&args, &link->cpus->dai_name);
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of_node_put(args.np);
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if (ret < 0)
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break;
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}
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if (ret == 0) {
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cpu_dai = of_parse_phandle(cpu, "sound-dai", 0);
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if (!cpu_dai)
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ret = -EINVAL;
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}
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of_node_put(cpu);
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if (ret < 0)
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goto err_put_node;
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ret = snd_soc_of_get_dai_link_codecs(dev, codec, codec_link);
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if (ret < 0)
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goto err_put_cpu_dai;
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/* Set capture capability only for boards with the MAX98090 CODEC */
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if (codec_link->num_codecs > 1) {
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card->dai_link[0].dpcm_capture = 1;
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card->dai_link[1].dpcm_capture = 1;
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}
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priv->sclk_i2s = of_clk_get_by_name(cpu_dai, "i2s_opclk1");
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if (IS_ERR(priv->sclk_i2s)) {
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ret = PTR_ERR(priv->sclk_i2s);
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goto err_put_cpu_dai;
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}
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priv->clk_i2s_bus = of_clk_get_by_name(cpu_dai, "iis");
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if (IS_ERR(priv->clk_i2s_bus)) {
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ret = PTR_ERR(priv->clk_i2s_bus);
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goto err_put_sclk;
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}
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ret = devm_snd_soc_register_card(dev, card);
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if (ret < 0) {
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dev_err_probe(dev, ret, "snd_soc_register_card() failed\n");
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goto err_put_clk_i2s;
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}
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of_node_put(cpu_dai);
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of_node_put(codec);
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return 0;
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err_put_clk_i2s:
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clk_put(priv->clk_i2s_bus);
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err_put_sclk:
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clk_put(priv->sclk_i2s);
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err_put_cpu_dai:
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of_node_put(cpu_dai);
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snd_soc_of_put_dai_link_codecs(codec_link);
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err_put_node:
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of_node_put(codec);
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return ret;
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}
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static int odroid_audio_remove(struct platform_device *pdev)
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{
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struct odroid_priv *priv = platform_get_drvdata(pdev);
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snd_soc_of_put_dai_link_codecs(&priv->card.dai_link[1]);
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clk_put(priv->sclk_i2s);
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clk_put(priv->clk_i2s_bus);
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return 0;
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}
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static const struct of_device_id odroid_audio_of_match[] = {
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{ .compatible = "hardkernel,odroid-xu3-audio" },
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{ .compatible = "hardkernel,odroid-xu4-audio" },
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{ .compatible = "samsung,odroid-xu3-audio" },
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{ .compatible = "samsung,odroid-xu4-audio" },
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{ },
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};
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MODULE_DEVICE_TABLE(of, odroid_audio_of_match);
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static struct platform_driver odroid_audio_driver = {
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.driver = {
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.name = "odroid-audio",
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.of_match_table = odroid_audio_of_match,
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.pm = &snd_soc_pm_ops,
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},
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.probe = odroid_audio_probe,
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.remove = odroid_audio_remove,
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};
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module_platform_driver(odroid_audio_driver);
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||
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MODULE_AUTHOR("Sylwester Nawrocki <s.nawrocki@samsung.com>");
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MODULE_DESCRIPTION("Odroid XU3/XU4 audio support");
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||
|
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MODULE_LICENSE("GPL v2");
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