ASoC: tegra: add tegra+RT5640 machine driver

NVIDIA Tegra audio complex, with RT5640 CODEC

Required properties:

- compatible : "nvidia,tegra-audio-rt5640"

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

- clock-names : Must include the following entries:

  "pll_a" (The Tegra clock of that name),

  "pll_a_out0" (The Tegra clock of that name),

  "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 RT5640's pins, and the jacks on the board:

  RT5640 pins:

  * DMIC1

  * DMIC2

  * MICBIAS1

  * IN1P

  * IN1R

  * IN2P

  * IN2R

  * HPOL

  * HPOR

  * LOUTL

  * LOUTR

  * MONOP

  * MONON

  * SPOLP

  * SPOLN

  * SPORP

  * SPORN

  Board connectors:

  * Headphones

  * Speakers

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

  connected to the CODEC.

- nvidia,audio-codec : The phandle of the RT5640 audio codec. This binding

  assumes that AIF1 on the CODEC is connected to Tegra.

Optional properties:

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

Example:

sound {

	compatible = "nvidia,tegra-audio-rt5640-dalmore",

			"nvidia,tegra-audio-rt5640";

	nvidia,model = "NVIDIA Tegra Dalmore";

	nvidia,audio-routing =

		"Headphones", "HPOR",

		"Headphones", "HPOL",

		"Speakers", "SPORP",

		"Speakers", "SPORN",

		"Speakers", "SPOLP",

		"Speakers", "SPOLN";

	nvidia,i2s-controller = <&tegra_i2s1>;

	nvidia,audio-codec = <&rt5640>;

	nvidia,hp-det-gpios = <&gpio 143 0>; /* GPIO PR7 */

	clocks = <&tegra_car 216>, <&tegra_car 217>, <&tegra_car 120>;

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

};

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

	  machine drivers to support below.

config SND_SOC_TEGRA_RT5640

	tristate "SoC Audio support for Tegra boards using an RT5640 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_RT5640

	help

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

	  boards using the RT5640 codec, such as Dalmore.

config SND_SOC_TEGRA_WM8753

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

	depends on SND_SOC_TEGRA && I2C

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

# Tegra machine Support

snd-soc-tegra-rt5640-objs := tegra_rt5640.o

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_RT5640) += snd-soc-tegra-rt5640.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

/*

* tegra_rt5640.c - Tegra machine ASoC driver for boards using WM8903 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 "../codecs/rt5640.h"

#include "tegra_asoc_utils.h"

#define DRV_NAME "tegra-snd-rt5640"

struct tegra_rt5640 {

	struct tegra_asoc_utils_data util_data;

	int gpio_hp_det;

};

static int tegra_rt5640_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_rt5640 *machine = snd_soc_card_get_drvdata(card);

	int srate, mclk;

	int err;

	srate = params_rate(params);

	mclk = 256 * srate;

	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, RT5640_SCLK_S_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_rt5640_ops = {

	.hw_params = tegra_rt5640_asoc_hw_params,

};

static struct snd_soc_jack tegra_rt5640_hp_jack;

static struct snd_soc_jack_pin tegra_rt5640_hp_jack_pins[] = {

	{

		.pin = "Headphones",

		.mask = SND_JACK_HEADPHONE,

	},

};

static struct snd_soc_jack_gpio tegra_rt5640_hp_jack_gpio = {

	.name = "Headphone detection",

	.report = SND_JACK_HEADPHONE,

	.debounce_time = 150,

	.invert = 1,

};

static const struct snd_soc_dapm_widget tegra_rt5640_dapm_widgets[] = {

	SND_SOC_DAPM_HP("Headphones", NULL),

	SND_SOC_DAPM_SPK("Speakers", NULL),

};

static const struct snd_kcontrol_new tegra_rt5640_controls[] = {

	SOC_DAPM_PIN_SWITCH("Speakers"),

};

static int tegra_rt5640_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_rt5640 *machine = snd_soc_card_get_drvdata(codec->card);

	snd_soc_jack_new(codec, "Headphones", SND_JACK_HEADPHONE,

			 &tegra_rt5640_hp_jack);

	snd_soc_jack_add_pins(&tegra_rt5640_hp_jack,

			ARRAY_SIZE(tegra_rt5640_hp_jack_pins),

			tegra_rt5640_hp_jack_pins);

	if (gpio_is_valid(machine->gpio_hp_det)) {

		tegra_rt5640_hp_jack_gpio.gpio = machine->gpio_hp_det;

		snd_soc_jack_add_gpios(&tegra_rt5640_hp_jack,

						1,

						&tegra_rt5640_hp_jack_gpio);

	}

	return 0;

}

static struct snd_soc_dai_link tegra_rt5640_dai = {

	.name = "RT5640",

	.stream_name = "RT5640 PCM",

	.codec_dai_name = "rt5640-aif1",

	.init = tegra_rt5640_asoc_init,

	.ops = &tegra_rt5640_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_rt5640 = {

	.name = "tegra-rt5640",

	.owner = THIS_MODULE,

	.dai_link = &tegra_rt5640_dai,

	.num_links = 1,

	.controls = tegra_rt5640_controls,

	.num_controls = ARRAY_SIZE(tegra_rt5640_controls),

	.dapm_widgets = tegra_rt5640_dapm_widgets,

	.num_dapm_widgets = ARRAY_SIZE(tegra_rt5640_dapm_widgets),

	.fully_routed = true,

};

static int tegra_rt5640_probe(struct platform_device *pdev)

{

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

	struct snd_soc_card *card = &snd_soc_tegra_rt5640;

	struct tegra_rt5640 *machine;

	int ret;

	machine = devm_kzalloc(&pdev->dev,

			sizeof(struct tegra_rt5640), GFP_KERNEL);

	if (!machine) {

		dev_err(&pdev->dev, "Can't allocate tegra_rt5640\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_rt5640_dai.codec_of_node = of_parse_phandle(np,

			"nvidia,audio-codec", 0);

	if (!tegra_rt5640_dai.codec_of_node) {

		dev_err(&pdev->dev,

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

		ret = -EINVAL;

		goto err;

	}

	tegra_rt5640_dai.cpu_of_node = of_parse_phandle(np,

			"nvidia,i2s-controller", 0);

	if (!tegra_rt5640_dai.cpu_of_node) {

		dev_err(&pdev->dev,

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

		ret = -EINVAL;

		goto err;

	}

	tegra_rt5640_dai.platform_of_node = tegra_rt5640_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_rt5640_remove(struct platform_device *pdev)

{

	struct snd_soc_card *card = platform_get_drvdata(pdev);

	struct tegra_rt5640 *machine = snd_soc_card_get_drvdata(card);

	snd_soc_jack_free_gpios(&tegra_rt5640_hp_jack, 1,

				&tegra_rt5640_hp_jack_gpio);

	snd_soc_unregister_card(card);

	tegra_asoc_utils_fini(&machine->util_data);

	return 0;

}

static const struct of_device_id tegra_rt5640_of_match[] = {

	{ .compatible = "nvidia,tegra-audio-rt5640", },

	{},

};

static struct platform_driver tegra_rt5640_driver = {

	.driver = {

		.name = DRV_NAME,

		.owner = THIS_MODULE,

		.pm = &snd_soc_pm_ops,

		.of_match_table = tegra_rt5640_of_match,

	},

	.probe = tegra_rt5640_probe,

	.remove = tegra_rt5640_remove,

};

module_platform_driver(tegra_rt5640_driver);

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

MODULE_DESCRIPTION("Tegra+RT5640 machine ASoC driver");

MODULE_LICENSE("GPL v2");

MODULE_ALIAS("platform:" DRV_NAME);

MODULE_DEVICE_TABLE(of, tegra_rt5640_of_match);