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linuxdebug/sound/soc/fsl/fsl_rpmsg.c

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// SPDX-License-Identifier: GPL-2.0+
// Copyright 2018-2021 NXP
#include <linux/clk.h>
#include <linux/clk-provider.h>
#include <linux/delay.h>
#include <linux/dmaengine.h>
#include <linux/module.h>
#include <linux/of_device.h>
#include <linux/of_address.h>
#include <linux/pm_runtime.h>
#include <linux/rpmsg.h>
#include <linux/slab.h>
#include <sound/core.h>
#include <sound/dmaengine_pcm.h>
#include <sound/pcm_params.h>
#include "fsl_rpmsg.h"
#include "imx-pcm.h"
#define FSL_RPMSG_RATES (SNDRV_PCM_RATE_8000 | \
SNDRV_PCM_RATE_16000 | \
SNDRV_PCM_RATE_48000)
#define FSL_RPMSG_FORMATS SNDRV_PCM_FMTBIT_S16_LE
/* 192kHz/32bit/2ch/60s size is 0x574e00 */
#define LPA_LARGE_BUFFER_SIZE (0x6000000)
static const unsigned int fsl_rpmsg_rates[] = {
8000, 11025, 16000, 22050, 44100,
32000, 48000, 96000, 88200, 176400, 192000,
352800, 384000, 705600, 768000, 1411200, 2822400,
};
static const struct snd_pcm_hw_constraint_list fsl_rpmsg_rate_constraints = {
.count = ARRAY_SIZE(fsl_rpmsg_rates),
.list = fsl_rpmsg_rates,
};
static int fsl_rpmsg_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct fsl_rpmsg *rpmsg = snd_soc_dai_get_drvdata(dai);
struct clk *p = rpmsg->mclk, *pll = NULL, *npll = NULL;
u64 rate = params_rate(params);
int ret = 0;
/* Get current pll parent */
while (p && rpmsg->pll8k && rpmsg->pll11k) {
struct clk *pp = clk_get_parent(p);
if (clk_is_match(pp, rpmsg->pll8k) ||
clk_is_match(pp, rpmsg->pll11k)) {
pll = pp;
break;
}
p = pp;
}
/* Switch to another pll parent if needed. */
if (pll) {
npll = (do_div(rate, 8000) ? rpmsg->pll11k : rpmsg->pll8k);
if (!clk_is_match(pll, npll)) {
ret = clk_set_parent(p, npll);
if (ret < 0)
dev_warn(dai->dev, "failed to set parent %s: %d\n",
__clk_get_name(npll), ret);
}
}
if (!(rpmsg->mclk_streams & BIT(substream->stream))) {
ret = clk_prepare_enable(rpmsg->mclk);
if (ret) {
dev_err(dai->dev, "failed to enable mclk: %d\n", ret);
return ret;
}
rpmsg->mclk_streams |= BIT(substream->stream);
}
return ret;
}
static int fsl_rpmsg_hw_free(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct fsl_rpmsg *rpmsg = snd_soc_dai_get_drvdata(dai);
if (rpmsg->mclk_streams & BIT(substream->stream)) {
clk_disable_unprepare(rpmsg->mclk);
rpmsg->mclk_streams &= ~BIT(substream->stream);
}
return 0;
}
static int fsl_rpmsg_startup(struct snd_pcm_substream *substream,
struct snd_soc_dai *cpu_dai)
{
int ret;
ret = snd_pcm_hw_constraint_list(substream->runtime, 0,
SNDRV_PCM_HW_PARAM_RATE,
&fsl_rpmsg_rate_constraints);
return ret;
}
static const struct snd_soc_dai_ops fsl_rpmsg_dai_ops = {
.startup = fsl_rpmsg_startup,
.hw_params = fsl_rpmsg_hw_params,
.hw_free = fsl_rpmsg_hw_free,
};
static struct snd_soc_dai_driver fsl_rpmsg_dai = {
.playback = {
.stream_name = "CPU-Playback",
.channels_min = 2,
.channels_max = 2,
.rates = SNDRV_PCM_RATE_KNOT,
.formats = FSL_RPMSG_FORMATS,
},
.capture = {
.stream_name = "CPU-Capture",
.channels_min = 2,
.channels_max = 2,
.rates = SNDRV_PCM_RATE_KNOT,
.formats = FSL_RPMSG_FORMATS,
},
.symmetric_rate = 1,
.symmetric_channels = 1,
.symmetric_sample_bits = 1,
.ops = &fsl_rpmsg_dai_ops,
};
static const struct snd_soc_component_driver fsl_component = {
.name = "fsl-rpmsg",
.legacy_dai_naming = 1,
};
static const struct fsl_rpmsg_soc_data imx7ulp_data = {
.rates = SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 |
SNDRV_PCM_RATE_48000,
.formats = SNDRV_PCM_FMTBIT_S16_LE,
};
static const struct fsl_rpmsg_soc_data imx8mm_data = {
.rates = SNDRV_PCM_RATE_KNOT,
.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE |
SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_DSD_U8 |
SNDRV_PCM_FMTBIT_DSD_U16_LE | SNDRV_PCM_FMTBIT_DSD_U32_LE,
};
static const struct fsl_rpmsg_soc_data imx8mn_data = {
.rates = SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |
SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |
SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 |
SNDRV_PCM_RATE_192000,
.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE |
SNDRV_PCM_FMTBIT_S32_LE,
};
static const struct fsl_rpmsg_soc_data imx8mp_data = {
.rates = SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |
SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |
SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 |
SNDRV_PCM_RATE_192000,
.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE |
SNDRV_PCM_FMTBIT_S32_LE,
};
static const struct of_device_id fsl_rpmsg_ids[] = {
{ .compatible = "fsl,imx7ulp-rpmsg-audio", .data = &imx7ulp_data},
{ .compatible = "fsl,imx8mm-rpmsg-audio", .data = &imx8mm_data},
{ .compatible = "fsl,imx8mn-rpmsg-audio", .data = &imx8mn_data},
{ .compatible = "fsl,imx8mp-rpmsg-audio", .data = &imx8mp_data},
{ .compatible = "fsl,imx8ulp-rpmsg-audio", .data = &imx7ulp_data},
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, fsl_rpmsg_ids);
static int fsl_rpmsg_probe(struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
struct fsl_rpmsg *rpmsg;
int ret;
rpmsg = devm_kzalloc(&pdev->dev, sizeof(struct fsl_rpmsg), GFP_KERNEL);
if (!rpmsg)
return -ENOMEM;
rpmsg->soc_data = of_device_get_match_data(&pdev->dev);
fsl_rpmsg_dai.playback.rates = rpmsg->soc_data->rates;
fsl_rpmsg_dai.capture.rates = rpmsg->soc_data->rates;
fsl_rpmsg_dai.playback.formats = rpmsg->soc_data->formats;
fsl_rpmsg_dai.capture.formats = rpmsg->soc_data->formats;
if (of_property_read_bool(np, "fsl,enable-lpa")) {
rpmsg->enable_lpa = 1;
rpmsg->buffer_size = LPA_LARGE_BUFFER_SIZE;
} else {
rpmsg->buffer_size = IMX_DEFAULT_DMABUF_SIZE;
}
/* Get the optional clocks */
rpmsg->ipg = devm_clk_get_optional(&pdev->dev, "ipg");
if (IS_ERR(rpmsg->ipg))
return PTR_ERR(rpmsg->ipg);
rpmsg->mclk = devm_clk_get_optional(&pdev->dev, "mclk");
if (IS_ERR(rpmsg->mclk))
return PTR_ERR(rpmsg->mclk);
rpmsg->dma = devm_clk_get_optional(&pdev->dev, "dma");
if (IS_ERR(rpmsg->dma))
return PTR_ERR(rpmsg->dma);
rpmsg->pll8k = devm_clk_get_optional(&pdev->dev, "pll8k");
if (IS_ERR(rpmsg->pll8k))
return PTR_ERR(rpmsg->pll8k);
rpmsg->pll11k = devm_clk_get_optional(&pdev->dev, "pll11k");
if (IS_ERR(rpmsg->pll11k))
return PTR_ERR(rpmsg->pll11k);
platform_set_drvdata(pdev, rpmsg);
pm_runtime_enable(&pdev->dev);
ret = devm_snd_soc_register_component(&pdev->dev, &fsl_component,
&fsl_rpmsg_dai, 1);
if (ret)
return ret;
rpmsg->card_pdev = platform_device_register_data(&pdev->dev,
"imx-audio-rpmsg",
PLATFORM_DEVID_NONE,
NULL,
0);
if (IS_ERR(rpmsg->card_pdev)) {
dev_err(&pdev->dev, "failed to register rpmsg card\n");
ret = PTR_ERR(rpmsg->card_pdev);
return ret;
}
return 0;
}
static int fsl_rpmsg_remove(struct platform_device *pdev)
{
struct fsl_rpmsg *rpmsg = platform_get_drvdata(pdev);
if (rpmsg->card_pdev)
platform_device_unregister(rpmsg->card_pdev);
return 0;
}
#ifdef CONFIG_PM
static int fsl_rpmsg_runtime_resume(struct device *dev)
{
struct fsl_rpmsg *rpmsg = dev_get_drvdata(dev);
int ret;
ret = clk_prepare_enable(rpmsg->ipg);
if (ret) {
dev_err(dev, "failed to enable ipg clock: %d\n", ret);
goto ipg_err;
}
ret = clk_prepare_enable(rpmsg->dma);
if (ret) {
dev_err(dev, "Failed to enable dma clock %d\n", ret);
goto dma_err;
}
return 0;
dma_err:
clk_disable_unprepare(rpmsg->ipg);
ipg_err:
return ret;
}
static int fsl_rpmsg_runtime_suspend(struct device *dev)
{
struct fsl_rpmsg *rpmsg = dev_get_drvdata(dev);
clk_disable_unprepare(rpmsg->dma);
clk_disable_unprepare(rpmsg->ipg);
return 0;
}
#endif
static const struct dev_pm_ops fsl_rpmsg_pm_ops = {
SET_RUNTIME_PM_OPS(fsl_rpmsg_runtime_suspend,
fsl_rpmsg_runtime_resume,
NULL)
};
static struct platform_driver fsl_rpmsg_driver = {
.probe = fsl_rpmsg_probe,
.remove = fsl_rpmsg_remove,
.driver = {
.name = "fsl_rpmsg",
.pm = &fsl_rpmsg_pm_ops,
.of_match_table = fsl_rpmsg_ids,
},
};
module_platform_driver(fsl_rpmsg_driver);
MODULE_DESCRIPTION("Freescale SoC Audio PRMSG CPU Interface");
MODULE_AUTHOR("Shengjiu Wang <shengjiu.wang@nxp.com>");
MODULE_ALIAS("platform:fsl_rpmsg");
MODULE_LICENSE("GPL");
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