Commit 8de2ae2a authored by Nicolin Chen's avatar Nicolin Chen Committed by Mark Brown
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ASoC: fsl: add imx-wm8962 machine driver 



This is the initial imx-wm8962 device-tree-only machine driver working with
fsl_ssi driver. More features can be added on top of it later.

Signed-off-by: default avatarNicolin Chen <b42378@freescale.com>
Signed-off-by: default avatarMark Brown <broonie@linaro.org>
parent dbdf6b54

Documentation/devicetree/bindings/sound/imx-audio-wm8962.txt

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Freescale i.MX audio complex with WM8962 codec



Required properties:

- compatible : "fsl,imx-audio-wm8962"

- model : The user-visible name of this sound complex

- ssi-controller : The phandle of the i.MX SSI controller

- audio-codec : The phandle of the WM8962 audio codec

- audio-routing : A list of the connections between audio components.

  Each entry is a pair of strings, the first being the connection's sink,

  the second being the connection's source. Valid names could be power

  supplies, WM8962 pins, and the jacks on the board:



  Power supplies:

   * Mic Bias



  Board connectors:

   * Mic Jack

   * Headphone Jack

   * Ext Spk



- mux-int-port : The internal port of the i.MX audio muxer (AUDMUX)

- mux-ext-port : The external port of the i.MX audio muxer



Note: The AUDMUX port numbering should start at 1, which is consistent with

hardware manual.



Example:



sound {

	compatible = "fsl,imx6q-sabresd-wm8962",

		     "fsl,imx-audio-wm8962";

	model = "wm8962-audio";

	ssi-controller = <&ssi2>;

	audio-codec = <&codec>;

		audio-routing =

		"Headphone Jack", "HPOUTL",

		"Headphone Jack", "HPOUTR",

		"Ext Spk", "SPKOUTL",

		"Ext Spk", "SPKOUTR",

		"MICBIAS", "AMIC",

		"IN3R", "MICBIAS",

		"DMIC", "MICBIAS",

		"DMICDAT", "DMIC";

	mux-int-port = <2>;

	mux-ext-port = <3>;

};

sound/soc/fsl/Kconfig

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@@ -168,6 +168,18 @@ config SND_SOC_EUKREA_TLV320 
	  Enable I2S based access to the TLV320AIC23B codec attached

	  to the SSI interface



config SND_SOC_IMX_WM8962

	tristate "SoC Audio support for i.MX boards with wm8962"

	depends on OF && I2C

	select SND_SOC_WM8962

	select SND_SOC_IMX_PCM_DMA

	select SND_SOC_IMX_AUDMUX

	select SND_SOC_FSL_SSI

	select SND_SOC_FSL_UTILS

	help

	  Say Y if you want to add support for SoC audio on an i.MX board with

	  a wm8962 codec.



config SND_SOC_IMX_SGTL5000

	tristate "SoC Audio support for i.MX boards with sgtl5000"

	depends on OF && I2C

sound/soc/fsl/Makefile

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@@ -42,6 +42,7 @@ snd-soc-phycore-ac97-objs := phycore-ac97.o 
snd-soc-mx27vis-aic32x4-objs := mx27vis-aic32x4.o

snd-soc-wm1133-ev1-objs := wm1133-ev1.o

snd-soc-imx-sgtl5000-objs := imx-sgtl5000.o

snd-soc-imx-wm8962-objs := imx-wm8962.o

snd-soc-imx-mc13783-objs := imx-mc13783.o



obj-$(CONFIG_SND_SOC_EUKREA_TLV320) += snd-soc-eukrea-tlv320.o
@@ -49,4 +50,5 @@ obj-$(CONFIG_SND_SOC_PHYCORE_AC97) += snd-soc-phycore-ac97.o 
obj-$(CONFIG_SND_SOC_MX27VIS_AIC32X4) += snd-soc-mx27vis-aic32x4.o

obj-$(CONFIG_SND_MXC_SOC_WM1133_EV1) += snd-soc-wm1133-ev1.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_MC13783) += snd-soc-imx-mc13783.o

sound/soc/fsl/imx-wm8962.c

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/*

 * Copyright 2013 Freescale Semiconductor, Inc.

 *

 * Based on imx-sgtl5000.c

 * Copyright 2012 Freescale Semiconductor, Inc.

 * Copyright 2012 Linaro Ltd.

 *

 * 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/of_i2c.h>

#include <linux/slab.h>

#include <linux/clk.h>

#include <sound/soc.h>

#include <sound/pcm_params.h>

#include <sound/soc-dapm.h>

#include <linux/pinctrl/consumer.h>



#include "../codecs/wm8962.h"

#include "imx-audmux.h"



#define DAI_NAME_SIZE	32



struct imx_wm8962_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;

};



struct imx_priv {

	struct platform_device *pdev;

};

static struct imx_priv card_priv;



static const struct snd_soc_dapm_widget imx_wm8962_dapm_widgets[] = {

	SND_SOC_DAPM_HP("Headphone Jack", NULL),

	SND_SOC_DAPM_SPK("Ext Spk", NULL),

	SND_SOC_DAPM_MIC("AMIC", NULL),

	SND_SOC_DAPM_MIC("DMIC", NULL),

};



static int sample_rate = 44100;

static snd_pcm_format_t sample_format = SNDRV_PCM_FORMAT_S16_LE;



static int imx_hifi_hw_params(struct snd_pcm_substream *substream,

		struct snd_pcm_hw_params *params)

{

	sample_rate = params_rate(params);

	sample_format = params_format(params);



	return 0;

}



static struct snd_soc_ops imx_hifi_ops = {

	.hw_params = imx_hifi_hw_params,

};



static int imx_wm8962_set_bias_level(struct snd_soc_card *card,

					struct snd_soc_dapm_context *dapm,

					enum snd_soc_bias_level level)

{

	struct snd_soc_dai *codec_dai = card->rtd[0].codec_dai;

	struct imx_priv *priv = &card_priv;

	struct imx_wm8962_data *data = platform_get_drvdata(priv->pdev);

	struct device *dev = &priv->pdev->dev;

	unsigned int pll_out;

	int ret;



	if (dapm->dev != codec_dai->dev)

		return 0;



	switch (level) {

	case SND_SOC_BIAS_PREPARE:

		if (dapm->bias_level == SND_SOC_BIAS_STANDBY) {

			if (sample_format == SNDRV_PCM_FORMAT_S24_LE)

				pll_out = sample_rate * 384;

			else

				pll_out = sample_rate * 256;



			ret = snd_soc_dai_set_pll(codec_dai, WM8962_FLL,

					WM8962_FLL_MCLK, data->clk_frequency,

					pll_out);

			if (ret < 0) {

				dev_err(dev, "failed to start FLL: %d\n", ret);

				return ret;

			}



			ret = snd_soc_dai_set_sysclk(codec_dai,

					WM8962_SYSCLK_FLL, pll_out,

					SND_SOC_CLOCK_IN);

			if (ret < 0) {

				dev_err(dev, "failed to set SYSCLK: %d\n", ret);

				return ret;

			}

		}

		break;



	case SND_SOC_BIAS_STANDBY:

		if (dapm->bias_level == SND_SOC_BIAS_PREPARE) {

			ret = snd_soc_dai_set_sysclk(codec_dai,

					WM8962_SYSCLK_MCLK, data->clk_frequency,

					SND_SOC_CLOCK_IN);

			if (ret < 0) {

				dev_err(dev,

					"failed to switch away from FLL: %d\n",

					ret);

				return ret;

			}



			ret = snd_soc_dai_set_pll(codec_dai, WM8962_FLL,

					0, 0, 0);

			if (ret < 0) {

				dev_err(dev, "failed to stop FLL: %d\n", ret);

				return ret;

			}

		}

		break;



	default:

		break;

	}



	dapm->bias_level = level;



	return 0;

}



static int imx_wm8962_late_probe(struct snd_soc_card *card)

{

	struct snd_soc_dai *codec_dai = card->rtd[0].codec_dai;

	struct imx_priv *priv = &card_priv;

	struct imx_wm8962_data *data = platform_get_drvdata(priv->pdev);

	struct device *dev = &priv->pdev->dev;

	int ret;



	ret = snd_soc_dai_set_sysclk(codec_dai, WM8962_SYSCLK_MCLK,

			data->clk_frequency, SND_SOC_CLOCK_IN);

	if (ret < 0)

		dev_err(dev, "failed to set sysclk in %s\n", __func__);



	return ret;

}



static int imx_wm8962_probe(struct platform_device *pdev)

{

	struct device_node *np = pdev->dev.of_node;

	struct device_node *ssi_np, *codec_np;

	struct platform_device *ssi_pdev;

	struct imx_priv *priv = &card_priv;

	struct i2c_client *codec_dev;

	struct imx_wm8962_data *data;

	int int_port, ext_port;

	int ret;



	priv->pdev = pdev;



	ret = of_property_read_u32(np, "mux-int-port", &int_port);

	if (ret) {

		dev_err(&pdev->dev, "mux-int-port missing or invalid\n");

		return ret;

	}

	ret = of_property_read_u32(np, "mux-ext-port", &ext_port);

	if (ret) {

		dev_err(&pdev->dev, "mux-ext-port missing or invalid\n");

		return ret;

	}



	/*

	 * The port numbering in the hardware manual starts at 1, while

	 * the audmux API expects it starts at 0.

	 */

	int_port--;

	ext_port--;

	ret = imx_audmux_v2_configure_port(int_port,

			IMX_AUDMUX_V2_PTCR_SYN |

			IMX_AUDMUX_V2_PTCR_TFSEL(ext_port) |

			IMX_AUDMUX_V2_PTCR_TCSEL(ext_port) |

			IMX_AUDMUX_V2_PTCR_TFSDIR |

			IMX_AUDMUX_V2_PTCR_TCLKDIR,

			IMX_AUDMUX_V2_PDCR_RXDSEL(ext_port));

	if (ret) {

		dev_err(&pdev->dev, "audmux internal port setup failed\n");

		return ret;

	}

	imx_audmux_v2_configure_port(ext_port,

			IMX_AUDMUX_V2_PTCR_SYN,

			IMX_AUDMUX_V2_PDCR_RXDSEL(int_port));

	if (ret) {

		dev_err(&pdev->dev, "audmux external port setup failed\n");

		return ret;

	}



	ssi_np = of_parse_phandle(pdev->dev.of_node, "ssi-controller", 0);

	codec_np = of_parse_phandle(pdev->dev.of_node, "audio-codec", 0);

	if (!ssi_np || !codec_np) {

		dev_err(&pdev->dev, "phandle missing or invalid\n");

		ret = -EINVAL;

		goto fail;

	}



	ssi_pdev = of_find_device_by_node(ssi_np);

	if (!ssi_pdev) {

		dev_err(&pdev->dev, "failed to find SSI platform device\n");

		ret = -EINVAL;

		goto fail;

	}

	codec_dev = of_find_i2c_device_by_node(codec_np);

	if (!codec_dev || !codec_dev->driver) {

		dev_err(&pdev->dev, "failed to find codec platform device\n");

		return -EINVAL;

	}



	data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);

	if (!data) {

		ret = -ENOMEM;

		goto fail;

	}



	data->codec_clk = devm_clk_get(&codec_dev->dev, NULL);

	if (IS_ERR(data->codec_clk)) {

		ret = PTR_ERR(data->codec_clk);

		dev_err(&codec_dev->dev, "failed to get codec clk: %d\n", ret);

		goto fail;

	}



	data->clk_frequency = clk_get_rate(data->codec_clk);

	ret = clk_prepare_enable(data->codec_clk);

	if (ret) {

		dev_err(&codec_dev->dev, "failed to enable codec clk: %d\n", ret);

		goto fail;

	}



	data->dai.name = "HiFi";

	data->dai.stream_name = "HiFi";

	data->dai.codec_dai_name = "wm8962";

	data->dai.codec_of_node = codec_np;

	data->dai.cpu_dai_name = dev_name(&ssi_pdev->dev);

	data->dai.platform_of_node = ssi_np;

	data->dai.ops = &imx_hifi_ops;

	data->dai.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |

			    SND_SOC_DAIFMT_CBM_CFM;



	data->card.dev = &pdev->dev;

	ret = snd_soc_of_parse_card_name(&data->card, "model");

	if (ret)

		goto clk_fail;

	ret = snd_soc_of_parse_audio_routing(&data->card, "audio-routing");

	if (ret)

		goto clk_fail;

	data->card.num_links = 1;

	data->card.dai_link = &data->dai;

	data->card.dapm_widgets = imx_wm8962_dapm_widgets;

	data->card.num_dapm_widgets = ARRAY_SIZE(imx_wm8962_dapm_widgets);



	data->card.late_probe = imx_wm8962_late_probe;

	data->card.set_bias_level = imx_wm8962_set_bias_level;



	ret = snd_soc_register_card(&data->card);

	if (ret) {

		dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);

		goto clk_fail;

	}



	platform_set_drvdata(pdev, data);

	of_node_put(ssi_np);

	of_node_put(codec_np);



	return 0;



clk_fail:

	if (!IS_ERR(data->codec_clk))

		clk_disable_unprepare(data->codec_clk);

fail:

	if (ssi_np)

		of_node_put(ssi_np);

	if (codec_np)

		of_node_put(codec_np);



	return ret;

}



static int imx_wm8962_remove(struct platform_device *pdev)

{

	struct imx_wm8962_data *data = platform_get_drvdata(pdev);



	if (!IS_ERR(data->codec_clk))

		clk_disable_unprepare(data->codec_clk);

	snd_soc_unregister_card(&data->card);



	return 0;

}



static const struct of_device_id imx_wm8962_dt_ids[] = {

	{ .compatible = "fsl,imx-audio-wm8962", },

	{ /* sentinel */ }

};

MODULE_DEVICE_TABLE(of, imx_wm8962_dt_ids);



static struct platform_driver imx_wm8962_driver = {

	.driver = {

		.name = "imx-wm8962",

		.owner = THIS_MODULE,

		.of_match_table = imx_wm8962_dt_ids,

	},

	.probe = imx_wm8962_probe,

	.remove = imx_wm8962_remove,

};

module_platform_driver(imx_wm8962_driver);



MODULE_AUTHOR("Freescale Semiconductor, Inc.");

MODULE_DESCRIPTION("Freescale i.MX WM8962 ASoC machine driver");

MODULE_LICENSE("GPL v2");

MODULE_ALIAS("platform:imx-wm8962");

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