ASoC: tegra: Add machine driver for WM8753 codec

NVIDIA Tegra audio complex

Required properties:

- compatible : "nvidia,tegra-audio-wm8753"

- 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 WM8753's pins, and the jacks on the board:

  WM8753 pins:

  * LOUT1

  * LOUT2

  * ROUT1

  * ROUT2

  * MONO1

  * MONO2

  * OUT3

  * OUT4

  * LINE1

  * LINE2

  * RXP

  * RXN

  * ACIN

  * ACOP

  * MIC1N

  * MIC1

  * MIC2N

  * MIC2

  * Mic Bias

  Board connectors:

  * Headphone Jack

  * Mic Jack

- nvidia,i2s-controller : The phandle of the Tegra I2S1 controller

- nvidia,audio-codec : The phandle of the WM8753 audio codec

Example:

sound {

	compatible = "nvidia,tegra-audio-wm8753-whistler",

		     "nvidia,tegra-audio-wm8753"

	nvidia,model = "tegra-wm8753-harmony";

	nvidia,audio-routing =

		"Headphone Jack", "LOUT1",

		"Headphone Jack", "ROUT1";

	nvidia,i2s-controller = <&i2s1>;

	nvidia,audio-codec = <&wm8753>;

};

	  Tegra30 I2S interface. You will also need to select the individual

	  machine drivers to support below.

config SND_SOC_TEGRA_WM8753

	tristate "SoC Audio support for Tegra boards using a WM8753 codec"

	depends on SND_SOC_TEGRA && I2C

	select SND_SOC_TEGRA20_I2S if ARCH_TEGRA_2x_SOC

	select SND_SOC_TEGRA30_I2S if ARCH_TEGRA_3x_SOC

	select SND_SOC_WM8753

	help

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

	  boards using the WM8753 codec, such as Whistler.

config MACH_HAS_SND_SOC_TEGRA_WM8903

	bool

	help

obj-$(CONFIG_SND_SOC_TEGRA30_I2S) += snd-soc-tegra30-i2s.o

# Tegra machine Support

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

snd-soc-tegra-wm8903-objs := tegra_wm8903.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_TRIMSLICE) += snd-soc-tegra-trimslice.o

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

/*

 * tegra_wm8753.c - Tegra machine ASoC driver for boards using WM8753 codec.

 *

 * Author: Stephen Warren <swarren@nvidia.com>

 * Copyright (C) 2010-2012 - NVIDIA, Inc.

 *

 * Based on code copyright/by:

 *

 * (c) 2009, 2010 Nvidia Graphics Pvt. Ltd.

 *

 * Copyright 2007 Wolfson Microelectronics PLC.

 * Author: Graeme Gregory

 *         graeme.gregory@wolfsonmicro.com or linux@wolfsonmicro.com

 *

 * 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.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA

 * 02110-1301 USA

 *

 */

#include <asm/mach-types.h>

#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>

#include "../codecs/wm8753.h"

#include "tegra_asoc_utils.h"

#define DRV_NAME "tegra-snd-wm8753"

struct tegra_wm8753 {

	struct tegra_asoc_utils_data util_data;

};

static int tegra_wm8753_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_codec *codec = rtd->codec;

	struct snd_soc_card *card = codec->card;

	struct tegra_wm8753 *machine = snd_soc_card_get_drvdata(card);

	int srate, mclk;

	int err;

	srate = params_rate(params);

	switch (srate) {

	case 11025:

	case 22050:

	case 44100:

	case 88200:

		mclk = 11289600;

		break;

	default:

		mclk = 12288000;

		break;

	}

	err = tegra_asoc_utils_set_rate(&machine->util_data, srate, mclk);

	if (err < 0) {

		dev_err(card->dev, "Can't configure clocks\n");

		return err;

	}

	err = snd_soc_dai_set_sysclk(codec_dai, WM8753_MCLK, mclk,

					SND_SOC_CLOCK_IN);

	if (err < 0) {

		dev_err(card->dev, "codec_dai clock not set\n");

		return err;

	}

	return 0;

}

static struct snd_soc_ops tegra_wm8753_ops = {

	.hw_params = tegra_wm8753_hw_params,

};

static const struct snd_soc_dapm_widget tegra_wm8753_dapm_widgets[] = {

	SND_SOC_DAPM_HP("Headphone Jack", NULL),

	SND_SOC_DAPM_MIC("Mic Jack", NULL),

};

static struct snd_soc_dai_link tegra_wm8753_dai = {

	.name = "WM8753",

	.stream_name = "WM8753 PCM",

	.codec_dai_name = "wm8753-hifi",

	.ops = &tegra_wm8753_ops,

	.dai_fmt = SND_SOC_DAIFMT_I2S |

			SND_SOC_DAIFMT_NB_NF |

			SND_SOC_DAIFMT_CBS_CFS,

};

static struct snd_soc_card snd_soc_tegra_wm8753 = {

	.name = "tegra-wm8753",

	.owner = THIS_MODULE,

	.dai_link = &tegra_wm8753_dai,

	.num_links = 1,

	.dapm_widgets = tegra_wm8753_dapm_widgets,

	.num_dapm_widgets = ARRAY_SIZE(tegra_wm8753_dapm_widgets),

	.fully_routed = true,

};

static __devinit int tegra_wm8753_driver_probe(struct platform_device *pdev)

{

	struct snd_soc_card *card = &snd_soc_tegra_wm8753;

	struct tegra_wm8753 *machine;

	int ret;

	machine = devm_kzalloc(&pdev->dev, sizeof(struct tegra_wm8753),

			       GFP_KERNEL);

	if (!machine) {

		dev_err(&pdev->dev, "Can't allocate tegra_wm8753 struct\n");

		ret = -ENOMEM;

		goto err;

	}

	card->dev = &pdev->dev;

	platform_set_drvdata(pdev, card);

	snd_soc_card_set_drvdata(card, machine);

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

	if (ret)

		goto err;

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

	if (ret)

		goto err;

	tegra_wm8753_dai.codec_of_node = of_parse_phandle(

			pdev->dev.of_node, "nvidia,audio-codec", 0);

	if (!tegra_wm8753_dai.codec_of_node) {

		dev_err(&pdev->dev,

			"Property 'nvidia,audio-codec' missing or invalid\n");

		ret = -EINVAL;

		goto err;

	}

	tegra_wm8753_dai.cpu_dai_of_node = of_parse_phandle(

			pdev->dev.of_node, "nvidia,i2s-controller", 0);

	if (!tegra_wm8753_dai.cpu_dai_of_node) {

		dev_err(&pdev->dev,

			"Property 'nvidia,i2s-controller' missing or invalid\n");

		ret = -EINVAL;

		goto err;

	}

	tegra_wm8753_dai.platform_of_node =

				tegra_wm8753_dai.cpu_dai_of_node;

	ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev);

	if (ret)

		goto err;

	ret = snd_soc_register_card(card);

	if (ret) {

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

			ret);

		goto err_fini_utils;

	}

	return 0;

err_fini_utils:

	tegra_asoc_utils_fini(&machine->util_data);

err:

	return ret;

}

static int __devexit tegra_wm8753_driver_remove(struct platform_device *pdev)

{

	struct snd_soc_card *card = platform_get_drvdata(pdev);

	struct tegra_wm8753 *machine = snd_soc_card_get_drvdata(card);

	snd_soc_unregister_card(card);

	tegra_asoc_utils_fini(&machine->util_data);

	return 0;

}

static const struct of_device_id tegra_wm8753_of_match[] __devinitconst = {

	{ .compatible = "nvidia,tegra-audio-wm8753", },

	{},

};

static struct platform_driver tegra_wm8753_driver = {

	.driver = {

		.name = DRV_NAME,

		.owner = THIS_MODULE,

		.pm = &snd_soc_pm_ops,

		.of_match_table = tegra_wm8753_of_match,

	},

	.probe = tegra_wm8753_driver_probe,

	.remove = __devexit_p(tegra_wm8753_driver_remove),

};

module_platform_driver(tegra_wm8753_driver);

MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");

MODULE_DESCRIPTION("Tegra+WM8753 machine ASoC driver");

MODULE_LICENSE("GPL");

MODULE_ALIAS("platform:" DRV_NAME);

MODULE_DEVICE_TABLE(of, tegra_wm8753_of_match);