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/*
* Copyright 2011 Freescale Semiconductor, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* 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 Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <linux/module.h>
#include <linux/device.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include <sound/jack.h>
#include <sound/soc-dapm.h>
#include "../codecs/sgtl5000.h"
#include "mxs-saif.h"
static int mxs_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_dai *cpu_dai = rtd->cpu_dai;
unsigned int rate = params_rate(params);
u32 dai_format, mclk;
int ret;
/* sgtl5000 does not support 512*rate when in 96000 fs */
switch (rate) {
case 96000:
mclk = 256 * rate;
break;
default:
mclk = 512 * rate;
break;
}
/* Sgtl5000 sysclk should be >= 8MHz and <= 27M */
if (mclk < 8000000 || mclk > 27000000) {
dev_err(codec_dai->dev, "Invalid mclk frequency: %u.%03uMHz\n",
mclk / 1000000, mclk / 1000 % 1000);
return -EINVAL;
}
/* Set SGTL5000's SYSCLK (provided by SAIF MCLK) */
ret = snd_soc_dai_set_sysclk(codec_dai, SGTL5000_SYSCLK, mclk, 0);
if (ret) {
dev_err(codec_dai->dev, "Failed to set sysclk to %u.%03uMHz\n",
mclk / 1000000, mclk / 1000 % 1000);
return ret;
}
/* The SAIF MCLK should be the same as SGTL5000_SYSCLK */
ret = snd_soc_dai_set_sysclk(cpu_dai, MXS_SAIF_MCLK, mclk, 0);
if (ret) {
dev_err(cpu_dai->dev, "Failed to set sysclk to %u.%03uMHz\n",
mclk / 1000000, mclk / 1000 % 1000);
return ret;
}
/* set codec to slave mode */
dai_format = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
SND_SOC_DAIFMT_CBS_CFS;
/* set codec DAI configuration */
ret = snd_soc_dai_set_fmt(codec_dai, dai_format);
if (ret) {
dev_err(codec_dai->dev, "Failed to set dai format to %08x\n",
dai_format);
return ret;
}
/* set cpu DAI configuration */
ret = snd_soc_dai_set_fmt(cpu_dai, dai_format);
if (ret) {
dev_err(cpu_dai->dev, "Failed to set dai format to %08x\n",
dai_format);
return ret;
}
return 0;
}
static struct snd_soc_ops mxs_sgtl5000_hifi_ops = {
.hw_params = mxs_sgtl5000_hw_params,
};
static struct snd_soc_dai_link mxs_sgtl5000_dai[] = {
{
.name = "HiFi Tx",
.stream_name = "HiFi Playback",
.codec_dai_name = "sgtl5000",
.ops = &mxs_sgtl5000_hifi_ops,
.playback_only = true,
}, {
.name = "HiFi Rx",
.stream_name = "HiFi Capture",
.codec_dai_name = "sgtl5000",
.ops = &mxs_sgtl5000_hifi_ops,
.capture_only = true,
},
};
static struct snd_soc_card mxs_sgtl5000 = {
.name = "mxs_sgtl5000",
.owner = THIS_MODULE,
.dai_link = mxs_sgtl5000_dai,
.num_links = ARRAY_SIZE(mxs_sgtl5000_dai),
};
static int mxs_sgtl5000_probe_dt(struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
struct device_node *saif_np[2], *codec_np;
int i;
if (!np)
return 1; /* no device tree */
saif_np[0] = of_parse_phandle(np, "saif-controllers", 0);
saif_np[1] = of_parse_phandle(np, "saif-controllers", 1);
codec_np = of_parse_phandle(np, "audio-codec", 0);
if (!saif_np[0] || !saif_np[1] || !codec_np) {
dev_err(&pdev->dev, "phandle missing or invalid\n");
return -EINVAL;
}
for (i = 0; i < 2; i++) {
mxs_sgtl5000_dai[i].codec_name = NULL;
mxs_sgtl5000_dai[i].codec_of_node = codec_np;
mxs_sgtl5000_dai[i].cpu_dai_name = NULL;
mxs_sgtl5000_dai[i].cpu_of_node = saif_np[i];
mxs_sgtl5000_dai[i].platform_name = NULL;
mxs_sgtl5000_dai[i].platform_of_node = saif_np[i];
}
of_node_put(codec_np);
of_node_put(saif_np[0]);
of_node_put(saif_np[1]);
return 0;
}
static int mxs_sgtl5000_probe(struct platform_device *pdev)
{
struct snd_soc_card *card = &mxs_sgtl5000;
int ret;
ret = mxs_sgtl5000_probe_dt(pdev);
if (ret < 0)
return ret;
/*
* Set an init clock(11.28Mhz) for sgtl5000 initialization(i2c r/w).
* The Sgtl5000 sysclk is derived from saif0 mclk and it's range
* should be >= 8MHz and <= 27M.
*/
ret = mxs_saif_get_mclk(0, 44100 * 256, 44100);
if (ret) {
dev_err(&pdev->dev, "failed to get mclk\n");
return ret;
}
card->dev = &pdev->dev;
platform_set_drvdata(pdev, card);
ret = snd_soc_register_card(card);
if (ret) {
dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
ret);
return ret;
}
return 0;
}
static int mxs_sgtl5000_remove(struct platform_device *pdev)
{
struct snd_soc_card *card = platform_get_drvdata(pdev);
mxs_saif_put_mclk(0);
snd_soc_unregister_card(card);
return 0;
}
static const struct of_device_id mxs_sgtl5000_dt_ids[] = {
{ .compatible = "fsl,mxs-audio-sgtl5000", },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, mxs_sgtl5000_dt_ids);
static struct platform_driver mxs_sgtl5000_audio_driver = {
.driver = {
.name = "mxs-sgtl5000",
.owner = THIS_MODULE,
.of_match_table = mxs_sgtl5000_dt_ids,
},
.probe = mxs_sgtl5000_probe,
.remove = mxs_sgtl5000_remove,
};
module_platform_driver(mxs_sgtl5000_audio_driver);
MODULE_AUTHOR("Freescale Semiconductor, Inc.");
MODULE_DESCRIPTION("MXS ALSA SoC Machine driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:mxs-sgtl5000");
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