[alsa-devel] [PATCH v1 3/4] ASoC: Add codec machine driver for RK3036

[Shunqian Zheng]

From: ZhengShunQian <zhengsq at rock-chips.com>

This patch add the machine driver for rk3036.

RK3036 SoC is integrated with Inno codec,
this patch should work for all RK3036 board.

Signed-off-by: ZhengShunQian <zhengsq at rock-chips.com>
---
 sound/soc/rockchip/Kconfig           |  10 +++
 sound/soc/rockchip/Makefile          |   2 +
 sound/soc/rockchip/rockchip_rk3036.c | 147 +++++++++++++++++++++++++++++++++++
 3 files changed, 159 insertions(+)
 create mode 100644 sound/soc/rockchip/rockchip_rk3036.c

diff --git a/sound/soc/rockchip/Kconfig b/sound/soc/rockchip/Kconfig
index 5709057..3d48bda 100644
--- a/sound/soc/rockchip/Kconfig
+++ b/sound/soc/rockchip/Kconfig
@@ -33,3 +33,13 @@ config SND_SOC_ROCKCHIP_RT5645
 	help
 	  Say Y or M here if you want to add support for SoC audio on Rockchip
 	  boards using the RT5645/RT5650 codec, such as Veyron.
+
+config SND_SOC_ROCKCHIP_RK3036
+	tristate "ASoC support for RK3036 inner codec"
+	depends on SND_SOC_ROCKCHIP
+	select SND_SOC_ROCKCHIP_I2S
+	help
+	  Say Y or M here if you want to add support for SoC audio on Rockchip
+	  RK3036.
+
+
diff --git a/sound/soc/rockchip/Makefile b/sound/soc/rockchip/Makefile
index e9ba558..9a770c8 100644
--- a/sound/soc/rockchip/Makefile
+++ b/sound/soc/rockchip/Makefile
@@ -4,7 +4,9 @@ snd-soc-rockchip-i2s-objs := rockchip_i2s.o
 obj-$(CONFIG_SND_SOC_ROCKCHIP_I2S) += snd-soc-rockchip-i2s.o
 
 snd-soc-rockchip-max98090-objs := rockchip_max98090.o
+snd-soc-rockchip-rk3036-objs := rockchip_rk3036.o
 snd-soc-rockchip-rt5645-objs := rockchip_rt5645.o
 
 obj-$(CONFIG_SND_SOC_ROCKCHIP_MAX98090) += snd-soc-rockchip-max98090.o
+obj-$(CONFIG_SND_SOC_ROCKCHIP_RK3036) += snd-soc-rockchip-rk3036.o
 obj-$(CONFIG_SND_SOC_ROCKCHIP_RT5645) += snd-soc-rockchip-rt5645.o
diff --git a/sound/soc/rockchip/rockchip_rk3036.c b/sound/soc/rockchip/rockchip_rk3036.c
new file mode 100644
index 0000000..3747d90
--- /dev/null
+++ b/sound/soc/rockchip/rockchip_rk3036.c
@@ -0,0 +1,147 @@
+/*
+ * Machine driver for rk3036 audio codec.
+ *
+ * Copyright (c) 2015, ROCKCHIP CORPORATION.  All rights reserved.
+ *
+ * Author: Zheng ShunQian<zhengsq at rock-chips.com>
+ */
+
+#include <linux/device.h>
+#include <linux/of.h>
+#include <linux/module.h>
+
+#include <sound/soc.h>
+#include <sound/pcm.h>
+#include <sound/soc-dapm.h>
+
+static int rk3036_hw_params(struct snd_pcm_substream *substream,
+			    struct snd_pcm_hw_params *params)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct snd_soc_dai *codec_dai = rtd->codec_dai;
+	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+	unsigned int dai_fmt = rtd->dai_link->dai_fmt;
+	int mclk, ret;
+
+	dev_dbg(rtd->dev, "codec machine: %s\n", __func__);
+	/* set codec DAI configuration */
+	ret = snd_soc_dai_set_fmt(codec_dai, dai_fmt);
+	if (ret < 0)
+		return ret;
+
+	/* set cpu DAI configuration */
+	ret = snd_soc_dai_set_fmt(cpu_dai, dai_fmt);
+	if (ret < 0)
+		return ret;
+
+	switch (params_rate(params)) {
+	case 8000:
+	case 16000:
+	case 24000:
+	case 32000:
+	case 48000:
+		mclk = 12288000;
+		break;
+	case 44100:
+		mclk = 11289600;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	/*Set the system clk for codec*/
+	ret = snd_soc_dai_set_sysclk(codec_dai, 0, mclk, SND_SOC_CLOCK_IN);
+	if (ret < 0)
+		return ret;
+
+	ret = snd_soc_dai_set_sysclk(cpu_dai, 0, mclk, SND_SOC_CLOCK_OUT);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static struct snd_soc_ops rk3036_ops = {
+	  .hw_params = rk3036_hw_params,
+};
+
+static int rk30_rk3036_codec_init(struct snd_soc_pcm_runtime *rtd)
+{
+	return 0;
+}
+
+static struct snd_soc_dai_link rk3036_dai = {
+	.name = "INNO-RK3036",
+	.stream_name = "RK3036 CODEC PCM",
+	.codec_dai_name = "rk3036-codec-dai",
+	.init = rk30_rk3036_codec_init,
+	.ops = &rk3036_ops,
+	/* set codec as slave */
+	.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
+		   SND_SOC_DAIFMT_CBS_CFS,
+};
+
+static struct snd_soc_card rockchip_rk3036_snd_card = {
+	.name = "ROCKCHIP-I2S",
+	.dai_link = &rk3036_dai,
+	.num_links = 1,
+};
+
+static int rockchip_rk3036_audio_probe(struct platform_device *pdev)
+{
+	struct snd_soc_card *card = &rockchip_rk3036_snd_card;
+	struct device_node *np = pdev->dev.of_node;
+
+	platform_set_drvdata(pdev, card);
+	card->dev = &pdev->dev;
+
+	rk3036_dai.codec_of_node = of_parse_phandle(np,
+			"rockchip,audio-codec", 0);
+	if (!rk3036_dai.codec_of_node) {
+		dev_err(&pdev->dev, "Property 'rockchip,audio-codec' "
+			"missing or invalid\n");
+		return -EINVAL;
+	}
+
+	rk3036_dai.cpu_of_node = of_parse_phandle(np,
+			"rockchip,i2s-controller", 0);
+	if (!rk3036_dai.cpu_of_node) {
+		dev_err(&pdev->dev, "Property 'rockchip,i2s-controller' "
+			"missing or invalid\n");
+		return -EINVAL;
+	}
+
+	rk3036_dai.platform_of_node = rk3036_dai.cpu_of_node;
+
+	return snd_soc_register_card(card);
+}
+
+static int rockchip_rk3036_audio_remove(struct platform_device *pdev)
+{
+	struct snd_soc_card *card = platform_get_drvdata(pdev);
+
+	snd_soc_unregister_card(card);
+
+	return 0;
+}
+
+static const struct of_device_id rockchip_rk3036_of_match[] = {
+		{ .compatible = "rockchip,rk3036-audio", },
+		{},
+};
+MODULE_DEVICE_TABLE(of, rockchip_rk3036_of_match);
+
+static struct platform_driver rockchip_rk3036_audio_driver = {
+	.driver = {
+		.name   = "rk3036-audio",
+		.owner  = THIS_MODULE,
+		.of_match_table = of_match_ptr(rockchip_rk3036_of_match),
+	},
+	.probe      = rockchip_rk3036_audio_probe,
+	.remove     = rockchip_rk3036_audio_remove,
+};
+module_platform_driver(rockchip_rk3036_audio_driver);
+
+MODULE_AUTHOR("Rockchip Inc.");
+MODULE_DESCRIPTION("Rockchip RK3036 Inno codec machine ASoC driver");
+MODULE_LICENSE("GPL");
-- 
1.9.1