MLK-10056-1 ASoC: imx-wm8960: add wm8960 machine driver

Add wm8960 machine driver.

Signed-off-by: Zidan Wang <zidan.wang@freescale.com>

3 files changed, 317 insertions, 0 deletions

diff --git a/sound/soc/fsl/Kconfig b/sound/soc/fsl/Kconfig
index 5b5b245d6534..3798af88ace9 100644
--- a/sound/soc/fsl/Kconfig
+++ b/sound/soc/fsl/Kconfig
@@ -266,6 +266,19 @@ config SND_SOC_IMX_WM8958
 	 Say Y if you want to add support for SoC audio on an i.MX board with
 	 a wm8958 codec.
 
+config SND_SOC_IMX_WM8960
+	tristate "SoC Audio support for i.MX boards with wm8960"
+	depends on OF && I2C
+	select SND_SOC_WM8960
+	select SND_SOC_IMX_PCM_DMA
+	select SND_SOC_FSL_SAI
+	select SND_SOC_FSL_UTILS
+	select SND_KCTL_JACK
+	help
+	 SoC Audio support for i.MX boards with WM8960
+	 Say Y if you want to add support for SoC audio on an i.MX board with
+	 a wm8960 codec.
+
 config SND_SOC_IMX_WM8962
 	tristate "SoC Audio support for i.MX boards with wm8962"
 	depends on OF && I2C
diff --git a/sound/soc/fsl/Makefile b/sound/soc/fsl/Makefile
index d0a90a1b5f74..01a3caa61983 100644
--- a/sound/soc/fsl/Makefile
+++ b/sound/soc/fsl/Makefile
@@ -56,6 +56,7 @@ snd-soc-wm1133-ev1-objs := wm1133-ev1.o
 snd-soc-imx-cs42888-objs := imx-cs42888.o
 snd-soc-imx-sgtl5000-objs := imx-sgtl5000.o
 snd-soc-imx-wm8958-objs := imx-wm8958.o
+snd-soc-imx-wm8960-objs := imx-wm8960.o
 snd-soc-imx-wm8962-objs := imx-wm8962.o
 snd-soc-imx-spdif-objs := imx-spdif.o
 snd-soc-imx-mc13783-objs := imx-mc13783.o
@@ -71,6 +72,7 @@ obj-$(CONFIG_SND_SOC_IMX_CS42888) += snd-soc-imx-cs42888.o
 obj-$(CONFIG_SND_SOC_IMX_SGTL5000) += snd-soc-imx-sgtl5000.o
 obj-$(CONFIG_SND_SOC_IMX_WM8962) += snd-soc-imx-wm8962.o
 obj-${CONFIG_SND_SOC_IMX_WM8958} += snd-soc-imx-wm8958.o
+obj-${CONFIG_SND_SOC_IMX_WM8960} += snd-soc-imx-wm8960.o
 obj-$(CONFIG_SND_SOC_IMX_SPDIF) += snd-soc-imx-spdif.o
 obj-$(CONFIG_SND_SOC_IMX_MC13783) += snd-soc-imx-mc13783.o
 obj-$(CONFIG_SND_SOC_IMX_HDMI) += snd-soc-imx-hdmi.o
diff --git a/sound/soc/fsl/imx-wm8960.c b/sound/soc/fsl/imx-wm8960.c
new file mode 100644
index 000000000000..e8554498e2ba
--- /dev/null
+++ b/sound/soc/fsl/imx-wm8960.c
@@ -0,0 +1,302 @@
+/*
+ * Copyright (C) 2015 Freescale Semiconductor, Inc.
+ *
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+
+#include <linux/module.h>
+#include <linux/of_platform.h>
+#include <linux/i2c.h>
+#include <linux/of_gpio.h>
+#include <linux/slab.h>
+#include <linux/gpio.h>
+#include <linux/clk.h>
+#include <sound/soc.h>
+#include <sound/jack.h>
+#include <sound/control.h>
+#include <sound/pcm_params.h>
+#include <sound/soc-dapm.h>
+#include <linux/pinctrl/consumer.h>
+#include "../codecs/wm8960.h"
+
+#define DAI_NAME_SIZE	32
+#define DEFAULT_MCLK_FREQ (12000000)
+
+struct imx_wm8960_data {
+	struct snd_soc_dai_link dai;
+	struct snd_soc_card card;
+	char codec_dai_name[DAI_NAME_SIZE];
+	char platform_name[DAI_NAME_SIZE];
+	struct clk *codec_clk;
+	unsigned int clk_frequency;
+	bool is_codec_master;
+};
+
+struct imx_priv {
+	struct snd_soc_codec *codec;
+	struct platform_device *pdev;
+	struct snd_card *snd_card;
+};
+static struct imx_priv card_priv;
+
+/* -1 for reserved value */
+static const int sysclk_divs[] = { 1, -1, 2, -1 };
+
+/* Multiply 256 for internal 256 div */
+static const int dac_divs[] = { 256, 384, 512, 768, 1024, 1408, 1536 };
+
+/* Multiply 10 to eliminate decimials */
+static const int bclk_divs[] = {
+	10, 15, 20, 30, 40, 55, 60, 80, 110,
+	120, 160, 220, 240, 320, 320, 320
+};
+
+static int imx_hifi_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;
+	struct snd_soc_card *card = codec_dai->codec->card;
+	struct imx_wm8960_data *data = snd_soc_card_get_drvdata(card);
+	struct device *dev = card->dev;
+	unsigned int sample_rate = params_rate(params);
+	unsigned int sysclk, pll_out;
+	int i, j, k, ret = 0;
+	int bclk = snd_soc_params_to_bclk(params);
+
+	if (params_channels(params) == 1)
+		bclk *= 2;
+
+	/* set cpu DAI configuration */
+	ret = snd_soc_dai_set_fmt(cpu_dai, data->dai.dai_fmt);
+	if (ret) {
+		dev_err(dev, "failed to set cpu dai fmt: %d\n", ret);
+		return ret;
+	}
+	/* set codec DAI configuration */
+	ret = snd_soc_dai_set_fmt(codec_dai, data->dai.dai_fmt);
+	if (ret) {
+		dev_err(dev, "failed to set codec dai fmt: %d\n", ret);
+		return ret;
+	}
+
+	/**
+	 * codec ADCLRC pin configured as GPIO, DACLRC pin is used as a frame
+	 * clock for ADCs and DACs
+	 **/
+	snd_soc_update_bits(codec_dai->codec, WM8960_IFACE2, 1<<6, 1<<6);
+	snd_soc_update_bits(codec_dai->codec, WM8960_ADDCTL4, 7<<4, 1<<4);
+
+	/* Enable headphone jack detect */
+	snd_soc_update_bits(codec_dai->codec, WM8960_ADDCTL2, 1<<6, 1<<6);
+	snd_soc_update_bits(codec_dai->codec, WM8960_ADDCTL4, 3<<2, 2<<2);
+	snd_soc_update_bits(codec_dai->codec, WM8960_ADDCTL1, 1, 1);
+
+	if (!data->is_codec_master) {
+		ret = snd_soc_dai_set_sysclk(cpu_dai, 0, 0, SND_SOC_CLOCK_OUT);
+		if (ret) {
+			dev_err(dev, "failed to set cpu sysclk: %d\n", ret);
+			return ret;
+		}
+		return 0;
+	} else {
+		ret = snd_soc_dai_set_sysclk(cpu_dai, 0, 0, SND_SOC_CLOCK_IN);
+		if (ret) {
+			dev_err(dev, "failed to set cpu sysclk: %d\n", ret);
+			return ret;
+		}
+	}
+
+	data->clk_frequency = clk_get_rate(data->codec_clk);
+	if (data->clk_frequency != DEFAULT_MCLK_FREQ) {
+		ret = clk_set_rate(data->codec_clk, DEFAULT_MCLK_FREQ);
+		if (ret < 0)
+			dev_dbg(dev, "fail to set codec clock frequency.\n");
+		else
+			data->clk_frequency = DEFAULT_MCLK_FREQ;
+	}
+
+	/* Use MCLK to provide sysclk directly*/
+	sysclk = data->clk_frequency;
+
+	for (i = 0; i < ARRAY_SIZE(sysclk_divs); ++i) {
+		if (sysclk_divs[i] == -1)
+			continue;
+		sysclk /= sysclk_divs[i];
+		for (j = 0; j < ARRAY_SIZE(dac_divs); ++j) {
+			if (sysclk == sample_rate * dac_divs[j]) {
+				for (k = 0; k < ARRAY_SIZE(bclk_divs); ++k)
+					if (sysclk == bclk * bclk_divs[k] / 10) {
+						snd_soc_dai_set_sysclk(codec_dai, WM8960_SYSCLK_MCLK, sysclk, 0);
+						snd_soc_dai_set_clkdiv(codec_dai, WM8960_SYSCLKDIV, i << 1);
+						return 0;
+					}
+			}
+		}
+	}
+
+	/* Use PLL to provide sysclk */
+	for (i = 0; i < ARRAY_SIZE(sysclk_divs); ++i) {
+		if (sysclk_divs[i] == -1)
+			continue;
+		for (j = 0; j < ARRAY_SIZE(dac_divs); ++j) {
+			sysclk = sample_rate * dac_divs[j];
+			pll_out = sysclk * sysclk_divs[i];
+
+			for (k = 0; k < ARRAY_SIZE(bclk_divs); ++k) {
+				if (sysclk == bclk * bclk_divs[k] / 10) {
+					/* Set codec pll */
+					ret = snd_soc_dai_set_pll(codec_dai, 0, 0, data->clk_frequency, pll_out);
+					if (ret != 0)
+						continue;
+					/* Set codec sysclk */
+					snd_soc_dai_set_sysclk(codec_dai, WM8960_SYSCLK_PLL, sysclk, 0);
+					snd_soc_dai_set_clkdiv(codec_dai, WM8960_SYSCLKDIV, i << 1);
+					return 0;
+				}
+			}
+		}
+	}
+
+	dev_err(dev, "failed to configure system clock");
+	return -EINVAL;
+}
+
+static int imx_hifi_hw_free(struct snd_pcm_substream *substream)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct snd_soc_dai *codec_dai = rtd->codec_dai;
+	struct snd_soc_card *card = codec_dai->codec->card;
+	struct imx_wm8960_data *data = snd_soc_card_get_drvdata(card);
+
+	/* Power down PLL to save power*/
+	if (data->is_codec_master)
+		snd_soc_dai_set_pll(codec_dai, 0, 0, 0, 0);
+
+	return 0;
+}
+
+static struct snd_soc_ops imx_hifi_ops = {
+	.hw_params = imx_hifi_hw_params,
+	.hw_free = imx_hifi_hw_free,
+};
+
+static int imx_wm8960_probe(struct platform_device *pdev)
+{
+	struct device_node *cpu_np, *codec_np;
+	struct platform_device *cpu_pdev;
+	struct imx_priv *priv = &card_priv;
+	struct i2c_client *codec_dev;
+	struct imx_wm8960_data *data;
+	int ret;
+
+	priv->pdev = pdev;
+
+	cpu_np = of_parse_phandle(pdev->dev.of_node, "cpu-dai", 0);
+	if (!cpu_np) {
+		dev_err(&pdev->dev, "cpu dai phandle missing or invalid\n");
+		ret = -EINVAL;
+		goto fail;
+	}
+
+	codec_np = of_parse_phandle(pdev->dev.of_node, "audio-codec", 0);
+	if (!codec_np) {
+		dev_err(&pdev->dev, "phandle missing or invalid\n");
+		ret = -EINVAL;
+		goto fail;
+	}
+
+	cpu_pdev = of_find_device_by_node(cpu_np);
+	if (!cpu_pdev) {
+		dev_err(&pdev->dev, "failed to find SAI platform device\n");
+		ret = -EINVAL;
+		goto fail;
+	}
+
+	codec_dev = of_find_i2c_device_by_node(codec_np);
+	if (!codec_dev || !codec_dev->dev.driver) {
+		dev_err(&pdev->dev, "failed to find codec platform device\n");
+		ret = -EINVAL;
+		goto fail;
+	}
+
+	data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
+	if (!data) {
+		ret = -ENOMEM;
+		goto fail;
+	}
+
+	if (of_property_read_bool(pdev->dev.of_node, "codec-master")) {
+		data->dai.dai_fmt = SND_SOC_DAIFMT_CBM_CFM;
+		data->is_codec_master = true;
+	} else
+		data->dai.dai_fmt = SND_SOC_DAIFMT_CBS_CFS;
+
+	data->codec_clk = devm_clk_get(&codec_dev->dev, "mclk");
+	if (IS_ERR(data->codec_clk)) {
+		ret = PTR_ERR(data->codec_clk);
+		dev_err(&pdev->dev, "failed to get codec clk: %d\n", ret);
+		goto fail;
+	}
+
+	data->dai.name = "HiFi";
+	data->dai.stream_name = "HiFi";
+	data->dai.codec_dai_name = "wm8960-hifi";
+	data->dai.codec_of_node = codec_np;
+	data->dai.cpu_dai_name = dev_name(&cpu_pdev->dev);
+	data->dai.platform_of_node = cpu_np;
+	data->dai.ops = &imx_hifi_ops;
+	data->dai.dai_fmt |= SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF;
+
+	data->card.dev = &pdev->dev;
+	ret = snd_soc_of_parse_card_name(&data->card, "model");
+	if (ret)
+		goto fail;
+	data->card.num_links = 1;
+	data->card.dai_link = &data->dai;
+
+	platform_set_drvdata(pdev, &data->card);
+	snd_soc_card_set_drvdata(&data->card, data);
+	ret = devm_snd_soc_register_card(&pdev->dev, &data->card);
+	if (ret) {
+		dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
+		goto fail;
+	}
+
+	priv->snd_card = data->card.snd_card;
+fail:
+	if (cpu_np)
+		of_node_put(cpu_np);
+	if (codec_np)
+		of_node_put(codec_np);
+
+	return ret;
+}
+
+static const struct of_device_id imx_wm8960_dt_ids[] = {
+	{ .compatible = "fsl,imx-audio-wm8960", },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, imx_wm8960_dt_ids);
+
+static struct platform_driver imx_wm8960_driver = {
+	.driver = {
+		.name = "imx-wm8960",
+		.owner = THIS_MODULE,
+		.pm = &snd_soc_pm_ops,
+		.of_match_table = imx_wm8960_dt_ids,
+	},
+	.probe = imx_wm8960_probe,
+};
+module_platform_driver(imx_wm8960_driver);
+
+MODULE_AUTHOR("Freescale Semiconductor, Inc.");
+MODULE_DESCRIPTION("Freescale i.MX WM8960 ASoC machine driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:imx-wm8960");