// SPDX-License-Identifier: GPL-2.0
/*
* Copyright 2017 NXP
*
* The code contained herein is licensed under the GNU General Public
* License. You may obtain a copy of the GNU General Public License
* Version 2 or later at the following locations:
*
* http://www.opensource.org/licenses/gpl-license.html
* http://www.gnu.org/copyleft/gpl.html
*/
#include <linux/module.h>
#include <linux/of_platform.h>
#include <linux/clk.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>
#include <linux/pm_runtime.h>
#include "fsl_sai.h"
#include "fsl_audmix.h"
struct imx_audmix {
struct platform_device *pdev;
struct snd_soc_card card;
struct platform_device *audmix_pdev;
struct platform_device *out_pdev;
struct clk *cpu_mclk;
int num_dai;
struct snd_soc_dai_link *dai;
int num_dai_conf;
struct snd_soc_codec_conf *dai_conf;
int num_dapm_routes;
struct snd_soc_dapm_route *dapm_routes;
};
static const u32 imx_audmix_rates[] = {
8000, 12000, 16000, 24000, 32000, 48000, 64000, 96000,
};
static const struct snd_pcm_hw_constraint_list imx_audmix_rate_constraints = {
.count = ARRAY_SIZE(imx_audmix_rates),
.list = imx_audmix_rates,
};
static int imx_audmix_fe_startup(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct imx_audmix *priv = snd_soc_card_get_drvdata(rtd->card);
struct snd_pcm_runtime *runtime = substream->runtime;
struct device *dev = rtd->card->dev;
unsigned long clk_rate = clk_get_rate(priv->cpu_mclk);
int ret;
if (clk_rate % 24576000 == 0) {
ret = snd_pcm_hw_constraint_list(runtime, 0,
SNDRV_PCM_HW_PARAM_RATE,
&imx_audmix_rate_constraints);
if (ret < 0)
return ret;
} else {
dev_warn(dev, "mclk may be not supported %lu\n", clk_rate);
}
ret = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
1, 8);
if (ret < 0)
return ret;
return snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT,
FSL_AUDMIX_FORMATS);
}
static int imx_audmix_fe_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct device *dev = rtd->card->dev;
bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
unsigned int fmt = SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_NB_NF;
u32 channels = params_channels(params);
int ret, dir;
/* For playback the AUDMIX is slave, and for record is master */
fmt |= tx ? SND_SOC_DAIFMT_CBS_CFS : SND_SOC_DAIFMT_CBM_CFM;
dir = tx ? SND_SOC_CLOCK_OUT : SND_SOC_CLOCK_IN;
/* set DAI configuration */
ret = snd_soc_dai_set_fmt(rtd->cpu_dai, fmt);
if (ret) {
dev_err(dev, "failed to set cpu dai fmt: %d\n", ret);
return ret;
}
ret = snd_soc_dai_set_sysclk(rtd->cpu_dai, FSL_SAI_CLK_MAST1, 0, dir);
if (ret) {
dev_err(dev, "failed to set cpu sysclk: %d\n", ret);
return ret;
}
/*
* Per datasheet, AUDMIX expects 8 slots and 32 bits
* for every slot in TDM mode.
*/
ret = snd_soc_dai_set_tdm_slot(rtd->cpu_dai, BIT(channels) - 1,
BIT(channels) - 1, 8, 32);
if (ret)
dev_err(dev, "failed to set cpu dai tdm slot: %d\n", ret);
return ret;
}
static int imx_audmix_be_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct device *dev = rtd->card->dev;
bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
unsigned int fmt = SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_NB_NF;
int ret;
if (!tx)
return 0;
/* For playback the AUDMIX is slave */
fmt |= SND_SOC_DAIFMT_CBM_CFM;
/* set AUDMIX DAI configuration */
ret = snd_soc_dai_set_fmt(rtd->cpu_dai, fmt);
if (ret)
dev_err(dev, "failed to set AUDMIX DAI fmt: %d\n", ret);
return ret;
}
static struct snd_soc_ops imx_audmix_fe_ops = {
.startup = imx_audmix_fe_startup,
.hw_params = imx_audmix_fe_hw_params,
};
static struct snd_soc_ops imx_audmix_be_ops = {
.hw_params = imx_audmix_be_hw_params,
};
static int imx_audmix_probe(struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
struct device_node *audmix_np = NULL, *out_cpu_np = NULL;
struct platform_device *audmix_pdev = NULL;
struct platform_device *cpu_pdev;
struct of_phandle_args args;
struct imx_audmix *priv;
int i, num_dai, ret;
const char *fe_name_pref = "HiFi-AUDMIX-FE-";
char *be_name, *be_pb, *be_cp, *dai_name, *capture_dai_name;
if (pdev->dev.parent) {
audmix_np = pdev->dev.parent->of_node;
} else {
dev_err(&pdev->dev, "Missing parent device.\n");
return -EINVAL;
}
if (!audmix_np) {
dev_err(&pdev->dev, "Missing DT node for parent device.\n");
return -EINVAL;
}
audmix_pdev = of_find_device_by_node(audmix_np);
if (!audmix_pdev) {
dev_err(&pdev->dev, "Missing AUDMIX platform device for %s\n",
np->full_name);
return -EINVAL;
}
put_device(&audmix_pdev->dev);
num_dai = of_count_phandle_with_args(audmix_np, "dais", NULL);
if (num_dai != FSL_AUDMIX_MAX_DAIS) {
dev_err(&pdev->dev, "Need 2 dais to be provided for %s\n",
audmix_np->full_name);
return -EINVAL;
}
priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
priv->num_dai = 2 * num_dai;
priv->dai = devm_kzalloc(&pdev->dev, priv->num_dai *
sizeof(struct snd_soc_dai_link), GFP_KERNEL);
if (!priv->dai)
return -ENOMEM;
priv->num_dai_conf = num_dai;
priv->dai_conf = devm_kzalloc(&pdev->dev, priv->num_dai_conf *
sizeof(struct snd_soc_codec_conf),
GFP_KERNEL);
if (!priv->dai_conf)
return -ENOMEM;
priv->num_dapm_routes = 3 * num_dai;
priv->dapm_routes = devm_kzalloc(&pdev->dev, priv->num_dapm_routes *
sizeof(struct snd_soc_dapm_route),
GFP_KERNEL);
if (!priv->dapm_routes)
return -ENOMEM;
for (i = 0; i < num_dai; i++) {
struct snd_soc_dai_link_component *dlc;
/* for CPU/Codec/Platform x 2 */
dlc = devm_kzalloc(&pdev->dev, 6 * sizeof(*dlc), GFP_KERNEL);
if (!dlc) {
dev_err(&pdev->dev, "failed to allocate dai_link\n");
return -ENOMEM;
}
ret = of_parse_phandle_with_args(audmix_np, "dais", NULL, i,
&args);
if (ret < 0) {
dev_err(&pdev->dev, "of_parse_phandle_with_args failed\n");
return ret;
}
cpu_pdev = of_find_device_by_node(args.np);
if (!cpu_pdev) {
dev_err(&pdev->dev, "failed to find SAI platform device\n");
return -EINVAL;
}
put_device(&cpu_pdev->dev);
dai_name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s%s",
fe_name_pref, args.np->full_name + 1);
dev_info(pdev->dev.parent, "DAI FE name:%s\n", dai_name);
if (i == 0) {
out_cpu_np = args.np;
capture_dai_name =
devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s %s",
dai_name, "CPU-Capture");
}
priv->dai[i].cpus = &dlc[0];
priv->dai[i].codecs = &dlc[1];
priv->dai[i].platforms = &dlc[2];
priv->dai[i].num_cpus = 1;
priv->dai[i].num_codecs = 1;
priv->dai[i].num_platforms = 1;
priv->dai[i].name = dai_name;
priv->dai[i].stream_name = "HiFi-AUDMIX-FE";
priv->dai[i].codecs->dai_name = "snd-soc-dummy-dai";
priv->dai[i].codecs->name = "snd-soc-dummy";
priv->dai[i].cpus->of_node = args.np;
priv->dai[i].cpus->dai_name = dev_name(&cpu_pdev->dev);
priv->dai[i].platforms->of_node = args.np;
priv->dai[i].dynamic = 1;
priv->dai[i].dpcm_playback = 1;
priv->dai[i].dpcm_capture = (i == 0 ? 1 : 0);
priv->dai[i].ignore_pmdown_time = 1;
priv->dai[i].ops = &imx_audmix_fe_ops;
/* Add AUDMIX Backend */
be_name = devm_kasprintf(&pdev->dev, GFP_KERNEL,
"audmix-%d", i);
be_pb = devm_kasprintf(&pdev->dev, GFP_KERNEL,
"AUDMIX-Playback-%d", i);
be_cp = devm_kasprintf(&pdev->dev, GFP_KERNEL,
"AUDMIX-Capture-%d", i);
priv->dai[num_dai + i].cpus = &dlc[3];
priv->dai[num_dai + i].codecs = &dlc[4];
priv->dai[num_dai + i].platforms = &dlc[5];
priv->dai[num_dai + i].num_cpus = 1;
priv->dai[num_dai + i].num_codecs = 1;
priv->dai[num_dai + i].num_platforms = 1;
priv->dai[num_dai + i].name = be_name;
priv->dai[num_dai + i].codecs->dai_name = "snd-soc-dummy-dai";
priv->dai[num_dai + i].codecs->name = "snd-soc-dummy";
priv->dai[num_dai + i].cpus->of_node = audmix_np;
priv->dai[num_dai + i].cpus->dai_name = be_name;
priv->dai[num_dai + i].platforms->name = "snd-soc-dummy";
priv->dai[num_dai + i].no_pcm = 1;
priv->dai[num_dai + i].dpcm_playback = 1;
priv->dai[num_dai + i].dpcm_capture = 1;
priv->dai[num_dai + i].ignore_pmdown_time = 1;
priv->dai[num_dai + i].ops = &imx_audmix_be_ops;
priv->dai_conf[i].of_node = args.np;
priv->dai_conf[i].name_prefix = dai_name;
priv->dapm_routes[i].source =
devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s %s",
dai_name, "CPU-Playback");
priv->dapm_routes[i].sink = be_pb;
priv->dapm_routes[num_dai + i].source = be_pb;
priv->dapm_routes[num_dai + i].sink = be_cp;
priv->dapm_routes[2 * num_dai + i].source = be_cp;
priv->dapm_routes[2 * num_dai + i].sink = capture_dai_name;
}
cpu_pdev = of_find_device_by_node(out_cpu_np);
if (!cpu_pdev) {
dev_err(&pdev->dev, "failed to find SAI platform device\n");
return -EINVAL;
}
put_device(&cpu_pdev->dev);
priv->cpu_mclk = devm_clk_get(&cpu_pdev->dev, "mclk1");
if (IS_ERR(priv->cpu_mclk)) {
ret = PTR_ERR(priv->cpu_mclk);
dev_err(&cpu_pdev->dev, "failed to get DAI mclk1: %d\n", ret);
return -EINVAL;
}
priv->audmix_pdev = audmix_pdev;
priv->out_pdev = cpu_pdev;
priv->card.dai_link = priv->dai;
priv->card.num_links = priv->num_dai;
priv->card.codec_conf = priv->dai_conf;
priv->card.num_configs = priv->num_dai_conf;
priv->card.dapm_routes = priv->dapm_routes;
priv->card.num_dapm_routes = priv->num_dapm_routes;
priv->card.dev = pdev->dev.parent;
priv->card.owner = THIS_MODULE;
priv->card.name = "imx-audmix";
platform_set_drvdata(pdev, &priv->card);
snd_soc_card_set_drvdata(&priv->card, priv);
ret = devm_snd_soc_register_card(pdev->dev.parent, &priv->card);
if (ret) {
dev_err(&pdev->dev, "snd_soc_register_card failed\n");
return ret;
}
return ret;
}
static struct platform_driver imx_audmix_driver = {
.probe = imx_audmix_probe,
.driver = {
.name = "imx-audmix",
.pm = &snd_soc_pm_ops,
},
};
module_platform_driver(imx_audmix_driver);
MODULE_DESCRIPTION("NXP AUDMIX ASoC machine driver");
MODULE_AUTHOR("Viorel Suman <viorel.suman@nxp.com>");
MODULE_ALIAS("platform:imx-audmix");
MODULE_LICENSE("GPL v2");
