1 files changed, 177 insertions, 52 deletions

diff --git a/sound/soc/samsung/snow.c b/sound/soc/samsung/snow.c
index d8ac907bbb0d..5d8efc2d5c38 100644
--- a/sound/soc/samsung/snow.c
+++ b/sound/soc/samsung/snow.c
@@ -11,97 +11,207 @@
  * General Public License for more details.
  */
 
+#include <linux/clk.h>
 #include <linux/module.h>
 #include <linux/platform_device.h>
 #include <linux/of.h>
 #include <linux/of_device.h>
-
+#include <sound/pcm_params.h>
 #include <sound/soc.h>
 
 #include "i2s.h"
 
 #define FIN_PLL_RATE		24000000
 
-static struct snd_soc_dai_link snow_dai[] = {
-	{
-		.name = "Primary",
-		.stream_name = "Primary",
-		.codec_dai_name = "HiFi",
-		.dai_fmt = SND_SOC_DAIFMT_I2S |
-				SND_SOC_DAIFMT_NB_NF |
-				SND_SOC_DAIFMT_CBS_CFS,
-	},
+struct snow_priv {
+	struct snd_soc_dai_link dai_link;
+	struct clk *clk_i2s_bus;
+};
+
+static int snow_card_hw_params(struct snd_pcm_substream *substream,
+				      struct snd_pcm_hw_params *params)
+{
+	static const unsigned int pll_rate[] = {
+		73728000U, 67737602U, 49152000U, 45158401U, 32768001U
+	};
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct snow_priv *priv = snd_soc_card_get_drvdata(rtd->card);
+	int bfs, psr, rfs, bitwidth;
+	unsigned long int rclk;
+	long int freq = -EINVAL;
+	int ret, i;
+
+	bitwidth = snd_pcm_format_width(params_format(params));
+	if (bitwidth < 0) {
+		dev_err(rtd->card->dev, "Invalid bit-width: %d\n", bitwidth);
+		return bitwidth;
+	}
+
+	if (bitwidth != 16 && bitwidth != 24) {
+		dev_err(rtd->card->dev, "Unsupported bit-width: %d\n", bitwidth);
+		return -EINVAL;
+	}
+
+	bfs = 2 * bitwidth;
+
+	switch (params_rate(params)) {
+	case 16000:
+	case 22050:
+	case 24000:
+	case 32000:
+	case 44100:
+	case 48000:
+	case 88200:
+	case 96000:
+		rfs = 8 * bfs;
+		break;
+	case 64000:
+		rfs = 384;
+		break;
+	case 8000:
+	case 11025:
+	case 12000:
+		rfs = 16 * bfs;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	rclk = params_rate(params) * rfs;
+
+	for (psr = 8; psr > 0; psr /= 2) {
+		for (i = 0; i < ARRAY_SIZE(pll_rate); i++) {
+			if ((pll_rate[i] - rclk * psr) <= 2) {
+				freq = pll_rate[i];
+				break;
+			}
+		}
+	}
+	if (freq < 0) {
+		dev_err(rtd->card->dev, "Unsupported RCLK rate: %lu\n", rclk);
+		return -EINVAL;
+	}
+
+	ret = clk_set_rate(priv->clk_i2s_bus, freq);
+	if (ret < 0) {
+		dev_err(rtd->card->dev, "I2S bus clock rate set failed\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+static const struct snd_soc_ops snow_card_ops = {
+	.hw_params = snow_card_hw_params,
 };
 
 static int snow_late_probe(struct snd_soc_card *card)
 {
 	struct snd_soc_pcm_runtime *rtd;
 	struct snd_soc_dai *codec_dai;
-	struct snd_soc_dai *cpu_dai;
-	int ret;
 
 	rtd = snd_soc_get_pcm_runtime(card, card->dai_link[0].name);
-	codec_dai = rtd->codec_dai;
-	cpu_dai = rtd->cpu_dai;
 
-	/* Set the MCLK rate for the codec */
-	ret = snd_soc_dai_set_sysclk(codec_dai, 0,
-					FIN_PLL_RATE, SND_SOC_CLOCK_IN);
-	if (ret < 0)
-		return ret;
+	/* In the multi-codec case codec_dais 0 is MAX98095 and 1 is HDMI. */
+	if (rtd->num_codecs > 1)
+		codec_dai = rtd->codec_dais[0];
+	else
+		codec_dai = rtd->codec_dai;
 
-	/* Select I2S Bus clock to set RCLK and BCLK */
-	ret = snd_soc_dai_set_sysclk(cpu_dai, SAMSUNG_I2S_RCLKSRC_0,
-					0, SND_SOC_CLOCK_IN);
-	if (ret < 0)
-		return ret;
-
-	return 0;
+	/* Set the MCLK rate for the codec */
+	return snd_soc_dai_set_sysclk(codec_dai, 0,
+				FIN_PLL_RATE, SND_SOC_CLOCK_IN);
 }
 
 static struct snd_soc_card snow_snd = {
 	.name = "Snow-I2S",
 	.owner = THIS_MODULE,
-	.dai_link = snow_dai,
-	.num_links = ARRAY_SIZE(snow_dai),
-
 	.late_probe = snow_late_probe,
 };
 
 static int snow_probe(struct platform_device *pdev)
 {
+	struct device *dev = &pdev->dev;
 	struct snd_soc_card *card = &snow_snd;
-	struct device_node *i2s_node, *codec_node;
-	int i, ret;
-
-	i2s_node = of_parse_phandle(pdev->dev.of_node,
-				    "samsung,i2s-controller", 0);
-	if (!i2s_node) {
-		dev_err(&pdev->dev,
-			"Property 'i2s-controller' missing or invalid\n");
-		return -EINVAL;
-	}
+	struct device_node *cpu, *codec;
+	struct snd_soc_dai_link *link;
+	struct snow_priv *priv;
+	int ret;
 
-	codec_node = of_parse_phandle(pdev->dev.of_node,
-				      "samsung,audio-codec", 0);
-	if (!codec_node) {
-		dev_err(&pdev->dev,
-			"Property 'audio-codec' missing or invalid\n");
-		return -EINVAL;
-	}
+	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	link = &priv->dai_link;
+
+	link->dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
+			SND_SOC_DAIFMT_CBS_CFS;
+
+	link->name = "Primary";
+	link->stream_name = link->name;
+
+	card->dai_link = link;
+	card->num_links = 1;
+	card->dev = dev;
+
+	/* Try new DT bindings with HDMI support first. */
+	cpu = of_get_child_by_name(dev->of_node, "cpu");
+
+	if (cpu) {
+		link->ops = &snow_card_ops;
 
-	for (i = 0; i < ARRAY_SIZE(snow_dai); i++) {
-		snow_dai[i].codec_of_node = codec_node;
-		snow_dai[i].cpu_of_node = i2s_node;
-		snow_dai[i].platform_of_node = i2s_node;
+		link->cpu_of_node = of_parse_phandle(cpu, "sound-dai", 0);
+		of_node_put(cpu);
+
+		if (!link->cpu_of_node) {
+			dev_err(dev, "Failed parsing cpu/sound-dai property\n");
+			return -EINVAL;
+		}
+
+		codec = of_get_child_by_name(dev->of_node, "codec");
+		ret = snd_soc_of_get_dai_link_codecs(dev, codec, link);
+		of_node_put(codec);
+
+		if (ret < 0) {
+			of_node_put(link->cpu_of_node);
+			dev_err(dev, "Failed parsing codec node\n");
+			return ret;
+		}
+
+		priv->clk_i2s_bus = of_clk_get_by_name(link->cpu_of_node,
+						       "i2s_opclk0");
+		if (IS_ERR(priv->clk_i2s_bus)) {
+			snd_soc_of_put_dai_link_codecs(link);
+			of_node_put(link->cpu_of_node);
+			return PTR_ERR(priv->clk_i2s_bus);
+		}
+	} else {
+		link->codec_dai_name = "HiFi",
+
+		link->cpu_of_node = of_parse_phandle(dev->of_node,
+						"samsung,i2s-controller", 0);
+		if (!link->cpu_of_node) {
+			dev_err(dev, "i2s-controller property parse error\n");
+			return -EINVAL;
+		}
+
+		link->codec_of_node = of_parse_phandle(dev->of_node,
+						"samsung,audio-codec", 0);
+		if (!link->codec_of_node) {
+			of_node_put(link->cpu_of_node);
+			dev_err(dev, "audio-codec property parse error\n");
+			return -EINVAL;
+		}
 	}
 
-	card->dev = &pdev->dev;
+	link->platform_of_node = link->cpu_of_node;
 
 	/* Update card-name if provided through DT, else use default name */
 	snd_soc_of_parse_card_name(card, "samsung,model");
 
-	ret = devm_snd_soc_register_card(&pdev->dev, card);
+	snd_soc_card_set_drvdata(card, priv);
+
+	ret = devm_snd_soc_register_card(dev, card);
 	if (ret) {
 		dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
 		return ret;
@@ -110,6 +220,20 @@ static int snow_probe(struct platform_device *pdev)
 	return ret;
 }
 
+static int snow_remove(struct platform_device *pdev)
+{
+	struct snow_priv *priv = platform_get_drvdata(pdev);
+	struct snd_soc_dai_link *link = &priv->dai_link;
+
+	of_node_put(link->cpu_of_node);
+	of_node_put(link->codec_of_node);
+	snd_soc_of_put_dai_link_codecs(link);
+
+	clk_put(priv->clk_i2s_bus);
+
+	return 0;
+}
+
 static const struct of_device_id snow_of_match[] = {
 	{ .compatible = "google,snow-audio-max98090", },
 	{ .compatible = "google,snow-audio-max98091", },
@@ -125,6 +249,7 @@ static struct platform_driver snow_driver = {
 		.of_match_table = snow_of_match,
 	},
 	.probe = snow_probe,
+	.remove = snow_remove,
 };
 
 module_platform_driver(snow_driver);