mirror of https://gitee.com/openkylin/linux.git
ASoC: mxs: add mxs-sgtl5000 machine driver
The driver only supports playback firstly. For recording, as we have to use two saif instances to implement full duplex (playback & recording) due to hardware limitation, we need to figure out a good design to fit in ASoC. Signed-off-by: Dong Aisheng <b29396@freescale.com> Acked-by: Liam Girdwood <lrg@ti.com> Tested-by: Wolfram Sang <w.sang@pengutronix.de> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Dong Aisheng
Mark Brown
parent
2a24f2ce89
commit
fcb5e47eff
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/*
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* Copyright 2011 Freescale Semiconductor, Inc.
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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 along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include <linux/module.h>
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#include <linux/device.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include <sound/soc.h>
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#include <sound/jack.h>
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#include <sound/soc-dapm.h>
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#include <asm/mach-types.h>
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#include "../codecs/sgtl5000.h"
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#include "mxs-saif.h"
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static int mxs_sgtl5000_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params)
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{
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct snd_soc_dai *codec_dai = rtd->codec_dai;
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struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
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unsigned int rate = params_rate(params);
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u32 dai_format, mclk;
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int ret;
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/* sgtl5000 does not support 512*rate when in 96000 fs */
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switch (rate) {
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case 96000:
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mclk = 256 * rate;
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break;
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default:
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mclk = 512 * rate;
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break;
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}
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/* Sgtl5000 sysclk should be >= 8MHz and <= 27M */
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if (mclk < 8000000 || mclk > 27000000)
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return -EINVAL;
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/* Set SGTL5000's SYSCLK (provided by SAIF MCLK) */
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ret = snd_soc_dai_set_sysclk(codec_dai, SGTL5000_SYSCLK, mclk, 0);
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if (ret)
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return ret;
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/* The SAIF MCLK should be the same as SGTL5000_SYSCLK */
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ret = snd_soc_dai_set_sysclk(cpu_dai, MXS_SAIF_MCLK, mclk, 0);
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if (ret)
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return ret;
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/* set codec to slave mode */
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dai_format = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
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SND_SOC_DAIFMT_CBS_CFS;
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/* set codec DAI configuration */
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ret = snd_soc_dai_set_fmt(codec_dai, dai_format);
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if (ret)
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return ret;
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/* set cpu DAI configuration */
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ret = snd_soc_dai_set_fmt(cpu_dai, dai_format);
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if (ret)
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return ret;
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return 0;
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}
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static struct snd_soc_ops mxs_sgtl5000_hifi_ops = {
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.hw_params = mxs_sgtl5000_hw_params,
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};
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static struct snd_soc_dai_link mxs_sgtl5000_dai[] = {
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{
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.name = "HiFi",
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.stream_name = "HiFi Playback",
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.codec_dai_name = "sgtl5000",
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.codec_name = "sgtl5000.0-000a",
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.cpu_dai_name = "mxs-saif.0",
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.platform_name = "mxs-pcm-audio.0",
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.ops = &mxs_sgtl5000_hifi_ops,
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},
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};
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static struct snd_soc_card mxs_sgtl5000 = {
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.name = "mxs_sgtl5000",
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.dai_link = mxs_sgtl5000_dai,
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.num_links = ARRAY_SIZE(mxs_sgtl5000_dai),
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};
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static int __devinit mxs_sgtl5000_probe(struct platform_device *pdev)
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{
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struct snd_soc_card *card = &mxs_sgtl5000;
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int ret;
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/*
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* Set an init clock(11.28Mhz) for sgtl5000 initialization(i2c r/w).
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* The Sgtl5000 sysclk is derived from saif0 mclk and it's range
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* should be >= 8MHz and <= 27M.
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*/
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ret = mxs_saif_get_mclk(0, 44100 * 256, 44100);
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if (ret)
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return ret;
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card->dev = &pdev->dev;
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platform_set_drvdata(pdev, card);
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ret = snd_soc_register_card(card);
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if (ret) {
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dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
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ret);
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return ret;
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}
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return 0;
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}
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static int __devexit mxs_sgtl5000_remove(struct platform_device *pdev)
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{
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struct snd_soc_card *card = platform_get_drvdata(pdev);
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mxs_saif_put_mclk(0);
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snd_soc_unregister_card(card);
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return 0;
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}
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static struct platform_driver mxs_sgtl5000_audio_driver = {
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.driver = {
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.name = "mxs-sgtl5000",
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.owner = THIS_MODULE,
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},
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.probe = mxs_sgtl5000_probe,
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.remove = __devexit_p(mxs_sgtl5000_remove),
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};
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static int __init mxs_sgtl5000_init(void)
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{
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return platform_driver_register(&mxs_sgtl5000_audio_driver);
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}
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module_init(mxs_sgtl5000_init);
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static void __exit mxs_sgtl5000_exit(void)
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{
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platform_driver_unregister(&mxs_sgtl5000_audio_driver);
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}
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module_exit(mxs_sgtl5000_exit);
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MODULE_AUTHOR("Freescale Semiconductor, Inc.");
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MODULE_DESCRIPTION("MXS ALSA SoC Machine driver");
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MODULE_LICENSE("GPL");
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