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// SPDX-License-Identifier: GPL-2.0+
// Copyright 2017-2020 NXP
#include <linux/module.h>
#include <linux/of_platform.h>
#include <linux/of_reserved_mem.h>
#include <linux/i2c.h>
#include <linux/of_gpio.h>
#include <linux/slab.h>
#include <linux/gpio.h>
#include <linux/clk.h>
#include <sound/soc.h>
#include <sound/jack.h>
#include <sound/control.h>
#include <sound/pcm_params.h>
#include <sound/soc-dapm.h>
#include "imx-pcm-rpmsg.h"
struct imx_rpmsg {
struct snd_soc_dai_link dai;
struct snd_soc_card card;
unsigned long sysclk;
bool lpa;
};
static struct dev_pm_ops lpa_pm;
static const struct snd_soc_dapm_widget imx_rpmsg_dapm_widgets[] = {
SND_SOC_DAPM_HP("Headphone Jack", NULL),
SND_SOC_DAPM_SPK("Ext Spk", NULL),
SND_SOC_DAPM_MIC("Mic Jack", NULL),
SND_SOC_DAPM_MIC("Main MIC", NULL),
};
static int imx_rpmsg_late_probe(struct snd_soc_card *card)
{
struct imx_rpmsg *data = snd_soc_card_get_drvdata(card);
struct snd_soc_pcm_runtime *rtd = list_first_entry(&card->rtd_list,
struct snd_soc_pcm_runtime, list);
struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0);
struct device *dev = card->dev;
int ret;
if (data->lpa) {
struct snd_soc_component *codec_comp;
struct device_node *codec_np;
struct device_driver *codec_drv;
struct device *codec_dev = NULL;
codec_np = data->dai.codecs->of_node;
if (codec_np) {
struct platform_device *codec_pdev;
struct i2c_client *codec_i2c;
codec_i2c = of_find_i2c_device_by_node(codec_np);
if (codec_i2c)
codec_dev = &codec_i2c->dev;
if (!codec_dev) {
codec_pdev = of_find_device_by_node(codec_np);
if (codec_pdev)
codec_dev = &codec_pdev->dev;
}
}
if (codec_dev) {
codec_comp = snd_soc_lookup_component_nolocked(codec_dev, NULL);
if (codec_comp) {
int i, num_widgets;
const char *widgets;
struct snd_soc_dapm_context *dapm;
num_widgets = of_property_count_strings(data->card.dev->of_node,
"ignore-suspend-widgets");
for (i = 0; i < num_widgets; i++) {
of_property_read_string_index(data->card.dev->of_node,
"ignore-suspend-widgets",
i, &widgets);
dapm = snd_soc_component_get_dapm(codec_comp);
snd_soc_dapm_ignore_suspend(dapm, widgets);
}
}
codec_drv = codec_dev->driver;
if (codec_drv->pm) {
memcpy(&lpa_pm, codec_drv->pm, sizeof(lpa_pm));
lpa_pm.suspend = NULL;
lpa_pm.resume = NULL;
lpa_pm.freeze = NULL;
lpa_pm.thaw = NULL;
lpa_pm.poweroff = NULL;
lpa_pm.restore = NULL;
codec_drv->pm = &lpa_pm;
}
put_device(codec_dev);
}
}
if (!data->sysclk)
return 0;
ret = snd_soc_dai_set_sysclk(codec_dai, 0, data->sysclk, SND_SOC_CLOCK_IN);
if (ret && ret != -ENOTSUPP) {
dev_err(dev, "failed to set sysclk in %s\n", __func__);
return ret;
}
return 0;
}
static int imx_rpmsg_probe(struct platform_device *pdev)
{
struct snd_soc_dai_link_component *dlc;
struct device *dev = pdev->dev.parent;
/* rpmsg_pdev is the platform device for the rpmsg node that probed us */
struct platform_device *rpmsg_pdev = to_platform_device(dev);
struct device_node *np = rpmsg_pdev->dev.of_node;
struct of_phandle_args args;
const char *platform_name;
struct imx_rpmsg *data;
int ret = 0;
dlc = devm_kzalloc(&pdev->dev, 3 * sizeof(*dlc), GFP_KERNEL);
if (!dlc)
return -ENOMEM;
data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
if (!data) {
ret = -ENOMEM;
goto fail;
}
ret = of_reserved_mem_device_init_by_idx(&pdev->dev, np, 0);
if (ret)
dev_warn(&pdev->dev, "no reserved DMA memory\n");
data->dai.cpus = &dlc[0];
data->dai.num_cpus = 1;
data->dai.platforms = &dlc[1];
data->dai.num_platforms = 1;
data->dai.codecs = &dlc[2];
data->dai.num_codecs = 1;
data->dai.name = "rpmsg hifi";
data->dai.stream_name = "rpmsg hifi";
data->dai.dai_fmt = SND_SOC_DAIFMT_I2S |
SND_SOC_DAIFMT_NB_NF |
SND_SOC_DAIFMT_CBC_CFC;
/*
* i.MX rpmsg sound cards work on codec slave mode. MCLK will be
* disabled by CPU DAI driver in hw_free(). Some codec requires MCLK
* present at power up/down sequence. So need to set ignore_pmdown_time
* to power down codec immediately before MCLK is turned off.
*/
data->dai.ignore_pmdown_time = 1;
/* Optional codec node */
ret = of_parse_phandle_with_fixed_args(np, "audio-codec", 0, 0, &args);
if (ret) {
*data->dai.codecs = snd_soc_dummy_dlc;
} else {
struct clk *clk;
ret = snd_soc_get_dlc(&args, data->dai.codecs);
if (ret) {
dev_err(&pdev->dev, "Unable to get codec_dai_name\n");
goto fail;
}
clk = devm_get_clk_from_child(&pdev->dev, args.np, NULL);
if (!IS_ERR(clk))
data->sysclk = clk_get_rate(clk);
}
data->dai.cpus->dai_name = dev_name(&rpmsg_pdev->dev);
if (!of_property_read_string(np, "fsl,rpmsg-channel-name", &platform_name))
data->dai.platforms->name = platform_name;
else
data->dai.platforms->name = "rpmsg-audio-channel";
data->dai.playback_only = true;
data->dai.capture_only = true;
data->card.num_links = 1;
data->card.dai_link = &data->dai;
if (of_property_read_bool(np, "fsl,rpmsg-out"))
data->dai.capture_only = false;
if (of_property_read_bool(np, "fsl,rpmsg-in"))
data->dai.playback_only = false;
if (data->dai.playback_only && data->dai.capture_only) {
dev_err(&pdev->dev, "no enabled rpmsg DAI link\n");
ret = -EINVAL;
goto fail;
}
if (of_property_read_bool(np, "fsl,enable-lpa"))
data->lpa = true;
data->card.dev = &pdev->dev;
data->card.owner = THIS_MODULE;
data->card.dapm_widgets = imx_rpmsg_dapm_widgets;
data->card.num_dapm_widgets = ARRAY_SIZE(imx_rpmsg_dapm_widgets);
data->card.late_probe = imx_rpmsg_late_probe;
/*
* Inoder to use common api to get card name and audio routing.
* Use parent of_node for this device, revert it after finishing using
*/
data->card.dev->of_node = np;
ret = snd_soc_of_parse_card_name(&data->card, "model");
if (ret)
goto fail;
if (of_property_read_bool(np, "audio-routing")) {
ret = snd_soc_of_parse_audio_routing(&data->card, "audio-routing");
if (ret) {
dev_err(&pdev->dev, "failed to parse audio-routing: %d\n", ret);
goto fail;
}
}
platform_set_drvdata(pdev, &data->card);
snd_soc_card_set_drvdata(&data->card, data);
ret = devm_snd_soc_register_card(&pdev->dev, &data->card);
if (ret) {
dev_err_probe(&pdev->dev, ret, "snd_soc_register_card failed\n");
goto fail;
}
fail:
pdev->dev.of_node = NULL;
return ret;
}
static struct platform_driver imx_rpmsg_driver = {
.driver = {
.name = "imx-audio-rpmsg",
.pm = &snd_soc_pm_ops,
},
.probe = imx_rpmsg_probe,
};
module_platform_driver(imx_rpmsg_driver);
MODULE_DESCRIPTION("Freescale SoC Audio RPMSG Machine Driver");
MODULE_AUTHOR("Shengjiu Wang <shengjiu.wang@nxp.com>");
MODULE_ALIAS("platform:imx-audio-rpmsg");
MODULE_LICENSE("GPL v2");
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