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/*
* tegra_dummy_machine.c - Tegra machine ASoC driver for boards
* that doesn't have codecs.
*
* Copyright (c) 2014, NVIDIA CORPORATION. All rights reserved.
* 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 <linux/module.h>
#include <linux/slab.h>
#include <sound/soc.h>
#include "tegra_asoc_utils.h"
#define DRV_NAME "tegra-snd-dummy"
#define DAI_LINK_SPDIF 0
#define NUM_DAI_LINKS 1
struct tegra_dummy_machine {
struct tegra_asoc_utils_data util_data;
struct snd_soc_card *pcard;
};
static int tegra_dummy_machine_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_card *card = rtd->card;
struct tegra_dummy_machine *machine = snd_soc_card_get_drvdata(card);
int srate, mclk, min_mclk;
int err;
srate = params_rate(params);
switch (srate) {
case 11025:
case 22050:
case 44100:
case 88200:
mclk = 11289600;
break;
case 8000:
case 16000:
case 32000:
case 48000:
case 64000:
case 96000:
mclk = 12288000;
break;
default:
return -EINVAL;
}
min_mclk = 128 * srate;
err = tegra_asoc_utils_set_rate(&machine->util_data, srate, mclk);
if (err < 0) {
if (!(machine->util_data.set_mclk % min_mclk))
mclk = machine->util_data.set_mclk;
else {
dev_err(card->dev, "Can't configure clocks\n");
return err;
}
}
tegra_asoc_utils_lock_clk_rate(&machine->util_data, 1);
return 0;
}
static int tegra_hw_free(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_card *card = rtd->card;
struct tegra_dummy_machine *machine = snd_soc_card_get_drvdata(card);
tegra_asoc_utils_lock_clk_rate(&machine->util_data, 0);
return 0;
}
static struct snd_soc_ops tegra_dummy_machine_ops = {
.hw_params = tegra_dummy_machine_hw_params,
.hw_free = tegra_hw_free,
};
static struct snd_soc_dai_link tegra_dummy_machine_dai[NUM_DAI_LINKS] = {
[DAI_LINK_SPDIF] = {
.name = "SPDIF",
.stream_name = "SPDIF PCM",
.codec_name = "spdif-dit.0",
.platform_name = "tegra30-spdif",
.cpu_dai_name = "tegra30-spdif",
.codec_dai_name = "dit-hifi",
.ops = &tegra_dummy_machine_ops,
},
};
static struct snd_soc_card snd_soc_tegra_dummy_machine = {
.name = "tegra-dummy",
.owner = THIS_MODULE,
.dai_link = tegra_dummy_machine_dai,
.num_links = ARRAY_SIZE(tegra_dummy_machine_dai),
.fully_routed = true,
};
static int tegra_dummy_machine_driver_probe(struct platform_device *pdev)
{
struct snd_soc_card *card = &snd_soc_tegra_dummy_machine;
struct tegra_dummy_machine *machine;
int ret;
machine = kzalloc(sizeof(struct tegra_dummy_machine), GFP_KERNEL);
if (!machine) {
dev_err(&pdev->dev, "Can't allocate tegra_dummy_machine struct\n");
return -ENOMEM;
}
machine->pcard = card;
ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev, card);
if (ret)
goto err_free_machine;
card->dev = &pdev->dev;
platform_set_drvdata(pdev, card);
snd_soc_card_set_drvdata(card, machine);
ret = snd_soc_register_card(card);
if (ret) {
dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
ret);
goto err_unregister_switch;
}
if (!card->instantiated) {
ret = -ENODEV;
dev_err(&pdev->dev, "sound card not instantiated (%d)\n",
ret);
goto err_unregister_card;
}
return 0;
err_unregister_card:
snd_soc_unregister_card(card);
err_unregister_switch:
tegra_asoc_utils_fini(&machine->util_data);
err_free_machine:
kfree(machine);
return ret;
}
static int tegra_dummy_machine_driver_remove(struct platform_device *pdev)
{
struct snd_soc_card *card = platform_get_drvdata(pdev);
struct tegra_dummy_machine *machine = snd_soc_card_get_drvdata(card);
snd_soc_unregister_card(card);
tegra_asoc_utils_fini(&machine->util_data);
kfree(machine);
return 0;
}
static const struct of_device_id tegra_dummy_machine_of_match[] = {
{ .compatible = "nvidia,tegra-audio-dummy", },
{},
};
static struct platform_driver tegra_dummy_machine_driver = {
.driver = {
.name = DRV_NAME,
.owner = THIS_MODULE,
.pm = &snd_soc_pm_ops,
.of_match_table = tegra_dummy_machine_of_match,
},
.probe = tegra_dummy_machine_driver_probe,
.remove = tegra_dummy_machine_driver_remove,
};
static int __init tegra_dummy_machine_modinit(void)
{
return platform_driver_register(&tegra_dummy_machine_driver);
}
module_init(tegra_dummy_machine_modinit);
static void __exit tegra_dummy_machine_modexit(void)
{
platform_driver_unregister(&tegra_dummy_machine_driver);
}
module_exit(tegra_dummy_machine_modexit);
MODULE_AUTHOR("Arun Kannan <akannan@nvidia.com>");
MODULE_DESCRIPTION("Tegra+dummy machine ASoC driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:" DRV_NAME);
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