156 lines
4.0 KiB
C
156 lines
4.0 KiB
C
/*
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* tda1997x.c -- tda1997x ALSA SoC Audio driver
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*
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* Copyright (C) 2013 Gateworks Corporation
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/clk.h>
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#include <linux/init.h>
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#include <linux/delay.h>
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#include <linux/mfd/tda1997x-core.h>
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/of_device.h>
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#include <linux/pm.h>
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#include <linux/regulator/driver.h>
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#include <linux/regulator/machine.h>
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#include <linux/slab.h>
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#include <sound/core.h>
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#include <sound/initval.h>
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#include <sound/soc.h>
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#include <sound/soc-dapm.h>
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#include <sound/tlv.h>
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#include <sound/pcm.h>
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#include <sound/pcm_params.h>
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/* refine sample-rate based on HDMI source */
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static int tda1997x_pcm_startup(struct snd_pcm_substream *substream,
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struct snd_soc_dai *dai)
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{
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struct snd_soc_codec *codec = dai->codec;
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struct snd_pcm_runtime *rtd = substream->runtime;
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tda1997x_audout_fmt_t fmt;
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int rate, ret;
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ret = tda1997x_get_audout_fmt(&fmt);
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if (ret) {
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dev_err(codec->dev, "failed to obtain tda1997x info: %d\n",
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ret);
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return -EIO;
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}
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rate = fmt.samplerate;
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ret = snd_pcm_hw_constraint_minmax(rtd, SNDRV_PCM_HW_PARAM_RATE,
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rate, rate);
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if (ret > 0)
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dev_info(codec->dev, "set samplerate constraint to %dHz\n",
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rate);
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else
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dev_err(codec->dev, "failed to set samplerate constraint "
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"to %dHz: %d\n", rate, ret);
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return 0;
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}
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static const struct snd_soc_dai_ops tda1997x_ops = {
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.startup = tda1997x_pcm_startup,
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};
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static struct snd_soc_dai_driver tda1997x_codec_dai = {
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.name = "tda1997x",
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.capture = {
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.stream_name = "Capture",
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.channels_min = 2,
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.channels_max = 2,
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/* rate and foramat are dependent on the HDMI source */
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.rates = SNDRV_PCM_RATE_32000 |
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SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |
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SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000 |
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SNDRV_PCM_RATE_176400 | SNDRV_PCM_RATE_192000,
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.formats = SNDRV_PCM_FMTBIT_S16_LE,
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},
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.ops = &tda1997x_ops,
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};
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static int tda1997x_probe(struct snd_soc_codec *codec)
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{
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pr_debug("%s\n", __func__);
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return 0;
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}
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static int tda1997x_remove(struct snd_soc_codec *codec)
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{
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pr_debug("%s\n", __func__);
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return 0;
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}
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static struct snd_soc_codec_driver tda1997x_codec_driver = {
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.probe = tda1997x_probe,
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.remove = tda1997x_remove,
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.reg_word_size = sizeof(u16),
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};
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static int tda1997x_codec_probe(struct platform_device *pdev)
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{
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int ret = 0;
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dev_info(&pdev->dev, "TDA1997x HDMI Audio In\n");
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ret = snd_soc_register_codec(&pdev->dev,
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&tda1997x_codec_driver, &tda1997x_codec_dai, 1);
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if (ret) {
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dev_err(&pdev->dev, "Failed to register codec: %d\n", ret);
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return ret;
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}
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pr_debug("%s registered codec and codec_dai\n", __func__);
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return 0;
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}
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static int tda1997x_codec_remove(struct platform_device *pdev)
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{
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snd_soc_unregister_codec(&pdev->dev);
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return 0;
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}
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static const struct of_device_id tda1997x_dt_ids[] = {
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{ .compatible = "nxp,tda1997x-codec", },
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{ /* sentinel */ }
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};
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MODULE_DEVICE_TABLE(of, tda1997x_dt_ids);
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struct platform_driver tda1997x_driver = {
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.driver = {
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.name = "tda1997x_codec",
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.owner = THIS_MODULE,
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.of_match_table = tda1997x_dt_ids,
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},
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.probe = tda1997x_codec_probe,
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.remove = tda1997x_codec_remove,
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};
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module_platform_driver(tda1997x_driver);
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MODULE_DESCRIPTION("NXP TDA1997x ALSA SoC Codec Driver");
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MODULE_AUTHOR("Tim Harvey <tharvey@gateworks.com>");
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MODULE_LICENSE("GPL v2");
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MODULE_ALIAS("platform:tda1997x-audio");
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