ASoC: tegra: add tegra machine driver using wm9712 codec

NVIDIA Tegra audio complex

Required properties:

- compatible : "nvidia,tegra-audio-wm9712"

- nvidia,model : The user-visible name of this sound complex.

- nvidia,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 for sources and

  sinks are the WM9712's pins, and the jacks on the board:

  WM9712 pins:

  * MONOOUT

  * HPOUTL

  * HPOUTR

  * LOUT2

  * ROUT2

  * OUT3

  * LINEINL

  * LINEINR

  * PHONE

  * PCBEEP

  * MIC1

  * MIC2

  * Mic Bias

  Board connectors:

  * Headphone

  * LineIn

  * Mic

- nvidia,ac97-controller : The phandle of the Tegra AC97 controller

Example:

sound {

	compatible = "nvidia,tegra-audio-wm9712-colibri_t20",

		         "nvidia,tegra-audio-wm9712";

	nvidia,model = "Toradex Colibri T20";

	nvidia,audio-routing =

		"Headphone", "HPOUTL",

		"Headphone", "HPOUTR",

		"LineIn", "LINEINL",

		"LineIn", "LINEINR",

		"Mic", "MIC1";

	nvidia,ac97-controller = <&ac97>;

};

	  boards using the WM8093 codec. Currently, the supported boards are

	  Harmony, Ventana, Seaboard, Kaen, and Aebl.

config SND_SOC_TEGRA_WM9712

	tristate "SoC Audio support for Tegra boards using a WM9712 codec"

	depends on SND_SOC_TEGRA && ARCH_TEGRA_2x_SOC

	select SND_SOC_TEGRA20_AC97

	select SND_SOC_WM9712

	help

	  Say Y or M here if you want to add support for SoC audio on Tegra

	  boards using the WM9712 (or compatible) codec.

config SND_SOC_TEGRA_TRIMSLICE

	tristate "SoC Audio support for TrimSlice board"

	depends on SND_SOC_TEGRA && I2C

# Tegra machine Support

snd-soc-tegra-wm8753-objs := tegra_wm8753.o

snd-soc-tegra-wm8903-objs := tegra_wm8903.o

snd-soc-tegra-wm9712-objs := tegra_wm9712.o

snd-soc-tegra-trimslice-objs := trimslice.o

snd-soc-tegra-alc5632-objs := tegra_alc5632.o

obj-$(CONFIG_SND_SOC_TEGRA_WM8753) += snd-soc-tegra-wm8753.o

obj-$(CONFIG_SND_SOC_TEGRA_WM8903) += snd-soc-tegra-wm8903.o

obj-$(CONFIG_SND_SOC_TEGRA_WM9712) += snd-soc-tegra-wm9712.o

obj-$(CONFIG_SND_SOC_TEGRA_TRIMSLICE) += snd-soc-tegra-trimslice.o

obj-$(CONFIG_SND_SOC_TEGRA_ALC5632) += snd-soc-tegra-alc5632.o

/*

 * tegra20_wm9712.c - Tegra machine ASoC driver for boards using WM9712 codec.

 *

 * Copyright 2012 Lucas Stach <dev@lynxeye.de>

 *

 * Partly based on code copyright/by:

 * Copyright 2011,2012 Toradex Inc.

 *

 * 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/module.h>

#include <linux/platform_device.h>

#include <linux/slab.h>

#include <linux/gpio.h>

#include <linux/of_gpio.h>

#include <sound/core.h>

#include <sound/jack.h>

#include <sound/pcm.h>

#include <sound/pcm_params.h>

#include <sound/soc.h>

#define DRV_NAME "tegra-snd-wm9712"

struct tegra_wm9712 {

	struct platform_device *codec;

};

static const struct snd_soc_dapm_widget tegra_wm9712_dapm_widgets[] = {

	SND_SOC_DAPM_HP("Headphone", NULL),

	SND_SOC_DAPM_LINE("LineIn", NULL),

	SND_SOC_DAPM_MIC("Mic", NULL),

};

static int tegra_wm9712_init(struct snd_soc_pcm_runtime *rtd)

{

	struct snd_soc_dai *codec_dai = rtd->codec_dai;

	struct snd_soc_codec *codec = codec_dai->codec;

	struct snd_soc_dapm_context *dapm = &codec->dapm;

	snd_soc_dapm_force_enable_pin(dapm, "Mic Bias");

	return snd_soc_dapm_sync(dapm);

}

static struct snd_soc_dai_link tegra_wm9712_dai = {

	.name = "AC97 HiFi",

	.stream_name = "AC97 HiFi",

	.cpu_dai_name = "tegra-ac97-pcm",

	.codec_dai_name = "wm9712-hifi",

	.codec_name = "wm9712-codec",

	.init = tegra_wm9712_init,

};

static struct snd_soc_card snd_soc_tegra_wm9712 = {

	.name = "tegra-wm9712",

	.owner = THIS_MODULE,

	.dai_link = &tegra_wm9712_dai,

	.num_links = 1,

	.dapm_widgets = tegra_wm9712_dapm_widgets,

	.num_dapm_widgets = ARRAY_SIZE(tegra_wm9712_dapm_widgets),

	.fully_routed = true,

};

static int tegra_wm9712_driver_probe(struct platform_device *pdev)

{

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

	struct snd_soc_card *card = &snd_soc_tegra_wm9712;

	struct tegra_wm9712 *machine;

	int ret;

	if (!pdev->dev.of_node) {

		dev_err(&pdev->dev, "No platform data supplied\n");

		return -EINVAL;

	}

	machine = devm_kzalloc(&pdev->dev, sizeof(struct tegra_wm9712),

			       GFP_KERNEL);

	if (!machine) {

		dev_err(&pdev->dev, "Can't allocate tegra_wm9712 struct\n");

		return -ENOMEM;

	}

	card->dev = &pdev->dev;

	platform_set_drvdata(pdev, card);

	snd_soc_card_set_drvdata(card, machine);

	machine->codec = platform_device_alloc("wm9712-codec", -1);

	if (!machine->codec) {

		dev_err(&pdev->dev, "Can't allocate wm9712 platform device\n");

		return -ENOMEM;

	}

	ret = platform_device_add(machine->codec);

	if (ret)

		goto codec_put;

	ret = snd_soc_of_parse_card_name(card, "nvidia,model");

	if (ret)

		goto codec_unregister;

	ret = snd_soc_of_parse_audio_routing(card, "nvidia,audio-routing");

	if (ret)

		goto codec_unregister;

	tegra_wm9712_dai.cpu_of_node = of_parse_phandle(np,

				       "nvidia,ac97-controller", 0);

	if (!tegra_wm9712_dai.cpu_of_node) {

		dev_err(&pdev->dev,

			"Property 'nvidia,ac97-controller' missing or invalid\n");

		ret = -EINVAL;

		goto codec_unregister;

	}

	tegra_wm9712_dai.platform_of_node = tegra_wm9712_dai.cpu_of_node;

	ret = snd_soc_register_card(card);

	if (ret) {

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

			ret);

		goto codec_unregister;

	}

	return 0;

codec_unregister:

	platform_device_del(machine->codec);

codec_put:

	platform_device_put(machine->codec);

	return ret;

}

static int tegra_wm9712_driver_remove(struct platform_device *pdev)

{

	struct snd_soc_card *card = platform_get_drvdata(pdev);

	struct tegra_wm9712 *machine = snd_soc_card_get_drvdata(card);

	snd_soc_unregister_card(card);

	platform_device_unregister(machine->codec);

	return 0;

}

static const struct of_device_id tegra_wm9712_of_match[] __devinitconst = {

	{ .compatible = "nvidia,tegra-audio-wm9712", },

	{},

};

static struct platform_driver tegra_wm9712_driver = {

	.driver = {

		.name = DRV_NAME,

		.owner = THIS_MODULE,

		.pm = &snd_soc_pm_ops,

		.of_match_table = tegra_wm9712_of_match,

	},

	.probe = tegra_wm9712_driver_probe,

	.remove = tegra_wm9712_driver_remove,

};

module_platform_driver(tegra_wm9712_driver);

MODULE_AUTHOR("Lucas Stach");

MODULE_DESCRIPTION("Tegra+WM9712 machine ASoC driver");

MODULE_LICENSE("GPL v2");

MODULE_ALIAS("platform:" DRV_NAME);

MODULE_DEVICE_TABLE(of, tegra_wm9712_of_match);