ASoC: tegra: add tegra+MAX98090 machine driver

NVIDIA Tegra audio complex, with MAX98090 CODEC

Required properties:

- compatible : "nvidia,tegra-audio-max98090"

- clocks : Must contain an entry for each entry in clock-names.

  See ../clocks/clock-bindings.txt for details.

- clock-names : Must include the following entries:

  - pll_a

  - pll_a_out0

  - mclk (The Tegra cdev1/extern1 clock, which feeds the CODEC's mclk)

- 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 MAX98090's pins (as documented in its binding), and the jacks

  on the board:

  * Headphones

  * Speakers

  * Mic Jack

- nvidia,i2s-controller : The phandle of the Tegra I2S controller that's

  connected to the CODEC.

- nvidia,audio-codec : The phandle of the MAX98090 audio codec.

Optional properties:

- nvidia,hp-det-gpios : The GPIO that detect headphones are plugged in

Example:

sound {

	compatible = "nvidia,tegra-audio-max98090-venice2",

		     "nvidia,tegra-audio-max98090";

	nvidia,model = "NVIDIA Tegra Venice2";

	nvidia,audio-routing =

		"Headphones", "HPR",

		"Headphones", "HPL",

		"Speakers", "SPKR",

		"Speakers", "SPKL",

		"Mic Jack", "MICBIAS",

		"IN34", "Mic Jack";

	nvidia,i2s-controller = <&tegra_i2s1>;

	nvidia,audio-codec = <&acodec>;

	clocks = <&tegra_car TEGRA124_CLK_PLL_A>,

		 <&tegra_car TEGRA124_CLK_PLL_A_OUT0>,

		 <&tegra_car TEGRA124_CLK_EXTERN1>;

	clock-names = "pll_a", "pll_a_out0", "mclk";

};

	help

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

	  Toshiba AC100 netbook.

config SND_SOC_TEGRA_MAX98090

	tristate "SoC Audio support for Tegra boards using a MAX98090 codec"

	depends on SND_SOC_TEGRA && I2C && GPIOLIB

	select SND_SOC_TEGRA20_I2S if ARCH_TEGRA_2x_SOC

	select SND_SOC_TEGRA30_I2S if ARCH_TEGRA_3x_SOC

	select SND_SOC_MAX98090

	help

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

	  boards using the MAX98090 codec, such as Venice2.

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

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

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

snd-soc-tegra-max98090-objs := tegra_max98090.o

obj-$(CONFIG_SND_SOC_TEGRA_RT5640) += snd-soc-tegra-rt5640.o

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

obj-$(CONFIG_SND_SOC_TEGRA_MAX98090) += snd-soc-tegra-max98090.o

/*

 * Tegra machine ASoC driver for boards using a MAX90809 CODEC.

 *

 * Copyright (c) 2013, NVIDIA CORPORATION.  All rights reserved.

 *

 * This program is free software; you can redistribute it and/or modify it

 * under the terms and conditions of the GNU General Public License,

 * version 2, as published by the Free Software Foundation.

 *

 * This program is distributed in the hope 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, see <http://www.gnu.org/licenses/>.

 *

 * Based on code copyright/by:

 *

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

 * Copyright (C) 2011 The AC100 Kernel Team <ac100@lists.lauchpad.net>

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

 * Copyright 2007 Wolfson Microelectronics PLC.

 */

#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 "tegra_asoc_utils.h"

#define DRV_NAME "tegra-snd-max98090"

struct tegra_max98090 {

	struct tegra_asoc_utils_data util_data;

	int gpio_hp_det;

};

static int tegra_max98090_asoc_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 = codec_dai->codec;

	struct snd_soc_card *card = codec->card;

	struct tegra_max98090 *machine = snd_soc_card_get_drvdata(card);

	int srate, mclk;

	int err;

	srate = params_rate(params);

	switch (srate) {

	case 8000:

	case 16000:

	case 24000:

	case 32000:

	case 48000:

	case 64000:

	case 96000:

		mclk = 12288000;

		break;

	case 11025:

	case 22050:

	case 44100:

	case 88200:

		mclk = 11289600;

		break;

	default:

		mclk = 12000000;

		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, 0, 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_max98090_ops = {

	.hw_params = tegra_max98090_asoc_hw_params,

};

static struct snd_soc_jack tegra_max98090_hp_jack;

static struct snd_soc_jack_pin tegra_max98090_hp_jack_pins[] = {

	{

		.pin = "Headphones",

		.mask = SND_JACK_HEADPHONE,

	},

};

static struct snd_soc_jack_gpio tegra_max98090_hp_jack_gpio = {

	.name = "Headphone detection",

	.report = SND_JACK_HEADPHONE,

	.debounce_time = 150,

	.invert = 1,

};

static const struct snd_soc_dapm_widget tegra_max98090_dapm_widgets[] = {

	SND_SOC_DAPM_HP("Headphones", NULL),

	SND_SOC_DAPM_SPK("Speakers", NULL),

	SND_SOC_DAPM_MIC("Mic Jack", NULL),

};

static const struct snd_kcontrol_new tegra_max98090_controls[] = {

	SOC_DAPM_PIN_SWITCH("Speakers"),

};

static int tegra_max98090_asoc_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 tegra_max98090 *machine = snd_soc_card_get_drvdata(codec->card);

	if (gpio_is_valid(machine->gpio_hp_det)) {

		snd_soc_jack_new(codec, "Headphones", SND_JACK_HEADPHONE,

				&tegra_max98090_hp_jack);

		snd_soc_jack_add_pins(&tegra_max98090_hp_jack,

				ARRAY_SIZE(tegra_max98090_hp_jack_pins),

				tegra_max98090_hp_jack_pins);

		tegra_max98090_hp_jack_gpio.gpio = machine->gpio_hp_det;

		snd_soc_jack_add_gpios(&tegra_max98090_hp_jack,

					1,

					&tegra_max98090_hp_jack_gpio);

	}

	return 0;

}

static struct snd_soc_dai_link tegra_max98090_dai = {

	.name = "max98090",

	.stream_name = "max98090 PCM",

	.codec_dai_name = "HiFi",

	.init = tegra_max98090_asoc_init,

	.ops = &tegra_max98090_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_max98090 = {

	.name = "tegra-max98090",

	.owner = THIS_MODULE,

	.dai_link = &tegra_max98090_dai,

	.num_links = 1,

	.controls = tegra_max98090_controls,

	.num_controls = ARRAY_SIZE(tegra_max98090_controls),

	.dapm_widgets = tegra_max98090_dapm_widgets,

	.num_dapm_widgets = ARRAY_SIZE(tegra_max98090_dapm_widgets),

	.fully_routed = true,

};

static int tegra_max98090_probe(struct platform_device *pdev)

{

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

	struct snd_soc_card *card = &snd_soc_tegra_max98090;

	struct tegra_max98090 *machine;

	int ret;

	machine = devm_kzalloc(&pdev->dev,

			sizeof(struct tegra_max98090), GFP_KERNEL);

	if (!machine) {

		dev_err(&pdev->dev, "Can't allocate tegra_max98090\n");

		return -ENOMEM;

	}

	card->dev = &pdev->dev;

	platform_set_drvdata(pdev, card);

	snd_soc_card_set_drvdata(card, machine);

	machine->gpio_hp_det = of_get_named_gpio(np, "nvidia,hp-det-gpios", 0);

	if (machine->gpio_hp_det == -EPROBE_DEFER)

		return -EPROBE_DEFER;

	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_max98090_dai.codec_of_node = of_parse_phandle(np,

			"nvidia,audio-codec", 0);

	if (!tegra_max98090_dai.codec_of_node) {

		dev_err(&pdev->dev,

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

		ret = -EINVAL;

		goto err;

	}

	tegra_max98090_dai.cpu_of_node = of_parse_phandle(np,

			"nvidia,i2s-controller", 0);

	if (!tegra_max98090_dai.cpu_of_node) {

		dev_err(&pdev->dev,

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

		ret = -EINVAL;

		goto err;

	}

	tegra_max98090_dai.platform_of_node = tegra_max98090_dai.cpu_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 tegra_max98090_remove(struct platform_device *pdev)

{

	struct snd_soc_card *card = platform_get_drvdata(pdev);

	struct tegra_max98090 *machine = snd_soc_card_get_drvdata(card);

	snd_soc_jack_free_gpios(&tegra_max98090_hp_jack, 1,

				&tegra_max98090_hp_jack_gpio);

	snd_soc_unregister_card(card);

	tegra_asoc_utils_fini(&machine->util_data);

	return 0;

}

static const struct of_device_id tegra_max98090_of_match[] = {

	{ .compatible = "nvidia,tegra-audio-max98090", },

	{},

};

static struct platform_driver tegra_max98090_driver = {

	.driver = {

		.name = DRV_NAME,

		.owner = THIS_MODULE,

		.pm = &snd_soc_pm_ops,

		.of_match_table = tegra_max98090_of_match,

	},

	.probe = tegra_max98090_probe,

	.remove = tegra_max98090_remove,

};

module_platform_driver(tegra_max98090_driver);

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

MODULE_DESCRIPTION("Tegra max98090 machine ASoC driver");

MODULE_LICENSE("GPL v2");

MODULE_ALIAS("platform:" DRV_NAME);

MODULE_DEVICE_TABLE(of, tegra_max98090_of_match);