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/*
* 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 const 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);
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