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-rw-r--r--sound/soc/samsung/odroid.c367
1 files changed, 367 insertions, 0 deletions
diff --git a/sound/soc/samsung/odroid.c b/sound/soc/samsung/odroid.c
new file mode 100644
index 000000000..1e0fefa89
--- /dev/null
+++ b/sound/soc/samsung/odroid.c
@@ -0,0 +1,367 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// Copyright (C) 2017 Samsung Electronics Co., Ltd.
+
+#include <linux/clk.h>
+#include <linux/clk-provider.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/module.h>
+#include <sound/soc.h>
+#include <sound/pcm_params.h>
+#include "i2s.h"
+#include "i2s-regs.h"
+
+struct odroid_priv {
+ struct snd_soc_card card;
+ struct clk *clk_i2s_bus;
+ struct clk *sclk_i2s;
+
+ /* Spinlock protecting fields below */
+ spinlock_t lock;
+ unsigned int be_sample_rate;
+ bool be_active;
+};
+
+static int odroid_card_fe_startup(struct snd_pcm_substream *substream)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+
+ snd_pcm_hw_constraint_single(runtime, SNDRV_PCM_HW_PARAM_CHANNELS, 2);
+
+ return 0;
+}
+
+static int odroid_card_fe_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params)
+{
+ struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
+ struct odroid_priv *priv = snd_soc_card_get_drvdata(rtd->card);
+ unsigned long flags;
+ int ret = 0;
+
+ spin_lock_irqsave(&priv->lock, flags);
+ if (priv->be_active && priv->be_sample_rate != params_rate(params))
+ ret = -EINVAL;
+ spin_unlock_irqrestore(&priv->lock, flags);
+
+ return ret;
+}
+
+static const struct snd_soc_ops odroid_card_fe_ops = {
+ .startup = odroid_card_fe_startup,
+ .hw_params = odroid_card_fe_hw_params,
+};
+
+static int odroid_card_be_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params)
+{
+ struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
+ struct odroid_priv *priv = snd_soc_card_get_drvdata(rtd->card);
+ unsigned int pll_freq, rclk_freq, rfs;
+ unsigned long flags;
+ int ret;
+
+ switch (params_rate(params)) {
+ case 64000:
+ pll_freq = 196608001U;
+ rfs = 384;
+ break;
+ case 44100:
+ case 88200:
+ pll_freq = 180633609U;
+ rfs = 512;
+ break;
+ case 32000:
+ case 48000:
+ case 96000:
+ pll_freq = 196608001U;
+ rfs = 512;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ ret = clk_set_rate(priv->clk_i2s_bus, pll_freq / 2 + 1);
+ if (ret < 0)
+ return ret;
+
+ /*
+ * We add 2 to the rclk_freq value in order to avoid too low clock
+ * frequency values due to the EPLL output frequency not being exact
+ * multiple of the audio sampling rate.
+ */
+ rclk_freq = params_rate(params) * rfs + 2;
+
+ ret = clk_set_rate(priv->sclk_i2s, rclk_freq);
+ if (ret < 0)
+ return ret;
+
+ if (rtd->dai_link->num_codecs > 1) {
+ struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 1);
+
+ ret = snd_soc_dai_set_sysclk(codec_dai, 0, rclk_freq,
+ SND_SOC_CLOCK_IN);
+ if (ret < 0)
+ return ret;
+ }
+
+ spin_lock_irqsave(&priv->lock, flags);
+ priv->be_sample_rate = params_rate(params);
+ spin_unlock_irqrestore(&priv->lock, flags);
+
+ return 0;
+}
+
+static int odroid_card_be_trigger(struct snd_pcm_substream *substream, int cmd)
+{
+ struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
+ struct odroid_priv *priv = snd_soc_card_get_drvdata(rtd->card);
+ unsigned long flags;
+
+ spin_lock_irqsave(&priv->lock, flags);
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ case SNDRV_PCM_TRIGGER_RESUME:
+ case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+ priv->be_active = true;
+ break;
+
+ case SNDRV_PCM_TRIGGER_STOP:
+ case SNDRV_PCM_TRIGGER_SUSPEND:
+ case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+ priv->be_active = false;
+ break;
+ }
+
+ spin_unlock_irqrestore(&priv->lock, flags);
+
+ return 0;
+}
+
+static const struct snd_soc_ops odroid_card_be_ops = {
+ .hw_params = odroid_card_be_hw_params,
+ .trigger = odroid_card_be_trigger,
+};
+
+/* DAPM routes for backward compatibility with old DTS */
+static const struct snd_soc_dapm_route odroid_dapm_routes[] = {
+ { "I2S Playback", NULL, "Mixer DAI TX" },
+ { "HiFi Playback", NULL, "Mixer DAI TX" },
+};
+
+SND_SOC_DAILINK_DEFS(primary,
+ DAILINK_COMP_ARRAY(COMP_EMPTY()),
+ DAILINK_COMP_ARRAY(COMP_DUMMY()),
+ DAILINK_COMP_ARRAY(COMP_PLATFORM("3830000.i2s")));
+
+SND_SOC_DAILINK_DEFS(mixer,
+ DAILINK_COMP_ARRAY(COMP_DUMMY()),
+ DAILINK_COMP_ARRAY(COMP_EMPTY()),
+ DAILINK_COMP_ARRAY(COMP_DUMMY()));
+
+SND_SOC_DAILINK_DEFS(secondary,
+ DAILINK_COMP_ARRAY(COMP_EMPTY()),
+ DAILINK_COMP_ARRAY(COMP_DUMMY()),
+ DAILINK_COMP_ARRAY(COMP_PLATFORM("3830000.i2s-sec")));
+
+static struct snd_soc_dai_link odroid_card_dais[] = {
+ {
+ /* Primary FE <-> BE link */
+ .ops = &odroid_card_fe_ops,
+ .name = "Primary",
+ .stream_name = "Primary",
+ .dynamic = 1,
+ .dpcm_playback = 1,
+ SND_SOC_DAILINK_REG(primary),
+ }, {
+ /* BE <-> CODECs link */
+ .name = "I2S Mixer",
+ .ops = &odroid_card_be_ops,
+ .no_pcm = 1,
+ .dpcm_playback = 1,
+ .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
+ SND_SOC_DAIFMT_CBS_CFS,
+ SND_SOC_DAILINK_REG(mixer),
+ }, {
+ /* Secondary FE <-> BE link */
+ .playback_only = 1,
+ .ops = &odroid_card_fe_ops,
+ .name = "Secondary",
+ .stream_name = "Secondary",
+ .dynamic = 1,
+ .dpcm_playback = 1,
+ SND_SOC_DAILINK_REG(secondary),
+ }
+};
+
+static int odroid_audio_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct device_node *cpu_dai = NULL;
+ struct device_node *cpu, *codec;
+ struct odroid_priv *priv;
+ struct snd_soc_card *card;
+ struct snd_soc_dai_link *link, *codec_link;
+ int num_pcms, ret, i;
+ struct of_phandle_args args = {};
+
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ card = &priv->card;
+ card->dev = dev;
+
+ card->owner = THIS_MODULE;
+ card->fully_routed = true;
+
+ spin_lock_init(&priv->lock);
+ snd_soc_card_set_drvdata(card, priv);
+
+ ret = snd_soc_of_parse_card_name(card, "model");
+ if (ret < 0)
+ return ret;
+
+ if (of_property_read_bool(dev->of_node, "samsung,audio-widgets")) {
+ ret = snd_soc_of_parse_audio_simple_widgets(card,
+ "samsung,audio-widgets");
+ if (ret < 0)
+ return ret;
+ }
+
+ if (of_property_read_bool(dev->of_node, "samsung,audio-routing")) {
+ ret = snd_soc_of_parse_audio_routing(card,
+ "samsung,audio-routing");
+ if (ret < 0)
+ return ret;
+ }
+
+ card->dai_link = odroid_card_dais;
+ card->num_links = ARRAY_SIZE(odroid_card_dais);
+
+ cpu = of_get_child_by_name(dev->of_node, "cpu");
+ codec = of_get_child_by_name(dev->of_node, "codec");
+ link = card->dai_link;
+ codec_link = &card->dai_link[1];
+
+ /*
+ * For backwards compatibility create the secondary CPU DAI link only
+ * if there are 2 CPU DAI entries in the cpu sound-dai property in DT.
+ * Also add required DAPM routes not available in old DTS.
+ */
+ num_pcms = of_count_phandle_with_args(cpu, "sound-dai",
+ "#sound-dai-cells");
+ if (num_pcms == 1) {
+ card->dapm_routes = odroid_dapm_routes;
+ card->num_dapm_routes = ARRAY_SIZE(odroid_dapm_routes);
+ card->num_links--;
+ }
+
+ for (i = 0; i < num_pcms; i++, link += 2) {
+ ret = of_parse_phandle_with_args(cpu, "sound-dai",
+ "#sound-dai-cells", i, &args);
+ if (ret < 0)
+ break;
+
+ if (!args.np) {
+ dev_err(dev, "sound-dai property parse error: %d\n", ret);
+ ret = -EINVAL;
+ break;
+ }
+
+ ret = snd_soc_get_dai_name(&args, &link->cpus->dai_name);
+ of_node_put(args.np);
+
+ if (ret < 0)
+ break;
+ }
+ if (ret == 0) {
+ cpu_dai = of_parse_phandle(cpu, "sound-dai", 0);
+ if (!cpu_dai)
+ ret = -EINVAL;
+ }
+
+ of_node_put(cpu);
+ if (ret < 0)
+ goto err_put_node;
+
+ ret = snd_soc_of_get_dai_link_codecs(dev, codec, codec_link);
+ if (ret < 0)
+ goto err_put_cpu_dai;
+
+ /* Set capture capability only for boards with the MAX98090 CODEC */
+ if (codec_link->num_codecs > 1) {
+ card->dai_link[0].dpcm_capture = 1;
+ card->dai_link[1].dpcm_capture = 1;
+ }
+
+ priv->sclk_i2s = of_clk_get_by_name(cpu_dai, "i2s_opclk1");
+ if (IS_ERR(priv->sclk_i2s)) {
+ ret = PTR_ERR(priv->sclk_i2s);
+ goto err_put_cpu_dai;
+ }
+
+ priv->clk_i2s_bus = of_clk_get_by_name(cpu_dai, "iis");
+ if (IS_ERR(priv->clk_i2s_bus)) {
+ ret = PTR_ERR(priv->clk_i2s_bus);
+ goto err_put_sclk;
+ }
+
+ ret = devm_snd_soc_register_card(dev, card);
+ if (ret < 0) {
+ dev_err_probe(dev, ret, "snd_soc_register_card() failed\n");
+ goto err_put_clk_i2s;
+ }
+
+ of_node_put(cpu_dai);
+ of_node_put(codec);
+ return 0;
+
+err_put_clk_i2s:
+ clk_put(priv->clk_i2s_bus);
+err_put_sclk:
+ clk_put(priv->sclk_i2s);
+err_put_cpu_dai:
+ of_node_put(cpu_dai);
+ snd_soc_of_put_dai_link_codecs(codec_link);
+err_put_node:
+ of_node_put(codec);
+ return ret;
+}
+
+static int odroid_audio_remove(struct platform_device *pdev)
+{
+ struct odroid_priv *priv = platform_get_drvdata(pdev);
+
+ snd_soc_of_put_dai_link_codecs(&priv->card.dai_link[1]);
+ clk_put(priv->sclk_i2s);
+ clk_put(priv->clk_i2s_bus);
+
+ return 0;
+}
+
+static const struct of_device_id odroid_audio_of_match[] = {
+ { .compatible = "hardkernel,odroid-xu3-audio" },
+ { .compatible = "hardkernel,odroid-xu4-audio" },
+ { .compatible = "samsung,odroid-xu3-audio" },
+ { .compatible = "samsung,odroid-xu4-audio" },
+ { },
+};
+MODULE_DEVICE_TABLE(of, odroid_audio_of_match);
+
+static struct platform_driver odroid_audio_driver = {
+ .driver = {
+ .name = "odroid-audio",
+ .of_match_table = odroid_audio_of_match,
+ .pm = &snd_soc_pm_ops,
+ },
+ .probe = odroid_audio_probe,
+ .remove = odroid_audio_remove,
+};
+module_platform_driver(odroid_audio_driver);
+
+MODULE_AUTHOR("Sylwester Nawrocki <s.nawrocki@samsung.com>");
+MODULE_DESCRIPTION("Odroid XU3/XU4 audio support");
+MODULE_LICENSE("GPL v2");