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Diffstat (limited to 'sound/soc/samsung/snow.c')
-rw-r--r--sound/soc/samsung/snow.c258
1 files changed, 258 insertions, 0 deletions
diff --git a/sound/soc/samsung/snow.c b/sound/soc/samsung/snow.c
new file mode 100644
index 000000000..5d8efc2d5
--- /dev/null
+++ b/sound/soc/samsung/snow.c
@@ -0,0 +1,258 @@
+/*
+ * ASoC machine driver for Snow boards
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * 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
+
+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;
+
+ rtd = snd_soc_get_pcm_runtime(card, card->dai_link[0].name);
+
+ /* 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;
+
+ /* 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,
+ .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 *cpu, *codec;
+ struct snd_soc_dai_link *link;
+ struct snow_priv *priv;
+ int ret;
+
+ 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;
+
+ 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;
+ }
+ }
+
+ 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");
+
+ 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;
+ }
+
+ 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", },
+ { .compatible = "google,snow-audio-max98095", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, snow_of_match);
+
+static struct platform_driver snow_driver = {
+ .driver = {
+ .name = "snow-audio",
+ .pm = &snd_soc_pm_ops,
+ .of_match_table = snow_of_match,
+ },
+ .probe = snow_probe,
+ .remove = snow_remove,
+};
+
+module_platform_driver(snow_driver);
+
+MODULE_DESCRIPTION("ALSA SoC Audio machine driver for Snow");
+MODULE_LICENSE("GPL");
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-28 12:27:31 +0000