ASoC: tegra: add tegra sgtl5000 machine driver

NVIDIA Tegra audio complex, with SGTL5000 CODEC

Required properties:

- compatible : "nvidia,tegra-audio-sgtl5000"

- 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 SGTL5000's pins (as documented in its binding), and the jacks

  on the board:

  * Headphone Jack

  * Line In Jack

  * 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 SGTL5000 audio codec.

Example:

sound {

	compatible = "toradex,tegra-audio-sgtl5000-apalis_t30",

		     "nvidia,tegra-audio-sgtl5000";

	nvidia,model = "Toradex Apalis T30";

	nvidia,audio-routing =

		"Headphone Jack", "HP_OUT",

		"LINE_IN", "Line In Jack",

		"MIC_IN", "Mic Jack";

	nvidia,i2s-controller = <&tegra_i2s2>;

	nvidia,audio-codec = <&sgtl5000>;

	clocks = <&tegra_car TEGRA30_CLK_PLL_A>,

		 <&tegra_car TEGRA30_CLK_PLL_A_OUT0>,

		 <&tegra_car TEGRA30_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 Tegra

	  boards using the RT5677 codec, such as Ryu.

config SND_SOC_TEGRA_SGTL5000

	tristate "SoC Audio support for Tegra boards using a SGTL5000 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_SGTL5000

	help

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

	  boards using the SGTL5000 codec, such as Apalis T30, Apalis TK1 or

	  Colibri T30.

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

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

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

snd-soc-tegra-sgtl5000-objs := tegra_sgtl5000.o

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

obj-$(CONFIG_SND_SOC_TEGRA_RT5677) += snd-soc-tegra-rt5677.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

obj-$(CONFIG_SND_SOC_TEGRA_SGTL5000) += snd-soc-tegra-sgtl5000.o

 No newline at end of file

/*

 * tegra_sgtl5000.c - Tegra machine ASoC driver for boards using SGTL5000 codec

 *

 * Author: Marcel Ziswiler <marcel@ziswiler.com>

 *

 * 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.

 * (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/pcm.h>

#include <sound/pcm_params.h>

#include <sound/soc.h>

#include "../codecs/sgtl5000.h"

#include "tegra_asoc_utils.h"

#define DRV_NAME "tegra-snd-sgtl5000"

struct tegra_sgtl5000 {

	struct tegra_asoc_utils_data util_data;

};

static int tegra_sgtl5000_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_card *card = rtd->card;

	struct tegra_sgtl5000 *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, SGTL5000_SYSCLK, 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_sgtl5000_ops = {

	.hw_params = tegra_sgtl5000_hw_params,

};

static const struct snd_soc_dapm_widget tegra_sgtl5000_dapm_widgets[] = {

	SND_SOC_DAPM_HP("Headphone Jack", NULL),

	SND_SOC_DAPM_LINE("Line In Jack", NULL),

	SND_SOC_DAPM_MIC("Mic Jack", NULL),

};

static struct snd_soc_dai_link tegra_sgtl5000_dai = {

	.name = "sgtl5000",

	.stream_name = "HiFi",

	.codec_dai_name = "sgtl5000",

	.ops = &tegra_sgtl5000_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_sgtl5000 = {

	.name = "tegra-sgtl5000",

	.owner = THIS_MODULE,

	.dai_link = &tegra_sgtl5000_dai,

	.num_links = 1,

	.dapm_widgets = tegra_sgtl5000_dapm_widgets,

	.num_dapm_widgets = ARRAY_SIZE(tegra_sgtl5000_dapm_widgets),

	.fully_routed = true,

};

static int tegra_sgtl5000_driver_probe(struct platform_device *pdev)

{

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

	struct snd_soc_card *card = &snd_soc_tegra_sgtl5000;

	struct tegra_sgtl5000 *machine;

	int ret;

	machine = devm_kzalloc(&pdev->dev, sizeof(struct tegra_sgtl5000),

			       GFP_KERNEL);

	if (!machine) {

		dev_err(&pdev->dev, "Can't allocate tegra_sgtl5000 struct\n");

		return -ENOMEM;

	}

	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_sgtl5000_dai.codec_of_node = of_parse_phandle(np,

			"nvidia,audio-codec", 0);

	if (!tegra_sgtl5000_dai.codec_of_node) {

		dev_err(&pdev->dev,

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

		ret = -EINVAL;

		goto err;

	}

	tegra_sgtl5000_dai.cpu_of_node = of_parse_phandle(np,

			"nvidia,i2s-controller", 0);

	if (!tegra_sgtl5000_dai.cpu_of_node) {

		dev_err(&pdev->dev,

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

		ret = -EINVAL;

		goto err;

	}

	tegra_sgtl5000_dai.platform_of_node = tegra_sgtl5000_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_sgtl5000_driver_remove(struct platform_device *pdev)

{

	struct snd_soc_card *card = platform_get_drvdata(pdev);

	struct tegra_sgtl5000 *machine = snd_soc_card_get_drvdata(card);

	int ret;

	ret = snd_soc_unregister_card(card);

	tegra_asoc_utils_fini(&machine->util_data);

	return ret;

}

static const struct of_device_id tegra_sgtl5000_of_match[] = {

	{ .compatible = "nvidia,tegra-audio-sgtl5000", },

	{ /* sentinel */ },

};

static struct platform_driver tegra_sgtl5000_driver = {

	.driver = {

		.name = DRV_NAME,

		.pm = &snd_soc_pm_ops,

		.of_match_table = tegra_sgtl5000_of_match,

	},

	.probe = tegra_sgtl5000_driver_probe,

	.remove = tegra_sgtl5000_driver_remove,

};

module_platform_driver(tegra_sgtl5000_driver);

MODULE_AUTHOR("Marcel Ziswiler <marcel@ziswiler.com>");

MODULE_DESCRIPTION("Tegra SGTL5000 machine ASoC driver");

MODULE_LICENSE("GPL v2");

MODULE_ALIAS("platform:" DRV_NAME);

MODULE_DEVICE_TABLE(of, tegra_sgtl5000_of_match);