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Unverified Commit be1df61c authored by Viorel Suman's avatar Viorel Suman Committed by Mark Brown
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ASoC: fsl: Add Audio Mixer CPU DAI driver 

This patch implements Audio Mixer CPU DAI driver for NXP iMX8 SOCs.
The Audio Mixer is a on-chip functional module that allows mixing of
two audio streams into a single audio stream.

Audio Mixer datasheet is available here:
https://www.nxp.com/docs/en/reference-manual/IMX8DQXPRM.pdf



Signed-off-by: default avatarViorel Suman <viorel.suman@nxp.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 64f01d2b

sound/soc/fsl/Kconfig

+7 −0
Original line number Diff line number Diff line
@@ -24,6 +24,13 @@ config SND_SOC_FSL_SAI 
	  This option is only useful for out-of-tree drivers since

	  in-tree drivers select it automatically.



config SND_SOC_FSL_AUDMIX

	tristate "Audio Mixer (AUDMIX) module support"

	select REGMAP_MMIO

	help

	  Say Y if you want to add Audio Mixer (AUDMIX)

	  support for the NXP iMX CPUs.



config SND_SOC_FSL_SSI

	tristate "Synchronous Serial Interface module (SSI) support"

	select SND_SOC_IMX_PCM_DMA if SND_IMX_SOC != n

sound/soc/fsl/Makefile

+3 −0
Original line number Diff line number Diff line
@@ -12,6 +12,7 @@ snd-soc-p1022-rdk-objs := p1022_rdk.o 
obj-$(CONFIG_SND_SOC_P1022_RDK) += snd-soc-p1022-rdk.o



# Freescale SSI/DMA/SAI/SPDIF Support

snd-soc-fsl-audmix-objs := fsl_audmix.o

snd-soc-fsl-asoc-card-objs := fsl-asoc-card.o

snd-soc-fsl-asrc-objs := fsl_asrc.o fsl_asrc_dma.o

snd-soc-fsl-sai-objs := fsl_sai.o
@@ -22,6 +23,8 @@ snd-soc-fsl-esai-objs := fsl_esai.o 
snd-soc-fsl-micfil-objs := fsl_micfil.o

snd-soc-fsl-utils-objs := fsl_utils.o

snd-soc-fsl-dma-objs := fsl_dma.o



obj-$(CONFIG_SND_SOC_FSL_AUDMIX) += snd-soc-fsl-audmix.o

obj-$(CONFIG_SND_SOC_FSL_ASOC_CARD) += snd-soc-fsl-asoc-card.o

obj-$(CONFIG_SND_SOC_FSL_ASRC) += snd-soc-fsl-asrc.o

obj-$(CONFIG_SND_SOC_FSL_SAI) += snd-soc-fsl-sai.o

sound/soc/fsl/fsl_audmix.c

0 → 100644
+576 −0
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0

/*

 * NXP AUDMIX ALSA SoC Digital Audio Interface (DAI) driver

 *

 * Copyright 2017 NXP

 */



#include <linux/clk.h>

#include <linux/module.h>

#include <linux/of_platform.h>

#include <linux/pm_runtime.h>

#include <sound/soc.h>

#include <sound/pcm_params.h>



#include "fsl_audmix.h"



#define SOC_ENUM_SINGLE_S(xreg, xshift, xtexts) \

	SOC_ENUM_SINGLE(xreg, xshift, ARRAY_SIZE(xtexts), xtexts)



static const char

	*tdm_sel[] = { "TDM1", "TDM2", },

	*mode_sel[] = { "Disabled", "TDM1", "TDM2", "Mixed", },

	*width_sel[] = { "16b", "18b", "20b", "24b", "32b", },

	*endis_sel[] = { "Disabled", "Enabled", },

	*updn_sel[] = { "Downward", "Upward", },

	*mask_sel[] = { "Unmask", "Mask", };



static const struct soc_enum fsl_audmix_enum[] = {

/* FSL_AUDMIX_CTR enums */

SOC_ENUM_SINGLE_S(FSL_AUDMIX_CTR, FSL_AUDMIX_CTR_MIXCLK_SHIFT, tdm_sel),

SOC_ENUM_SINGLE_S(FSL_AUDMIX_CTR, FSL_AUDMIX_CTR_OUTSRC_SHIFT, mode_sel),

SOC_ENUM_SINGLE_S(FSL_AUDMIX_CTR, FSL_AUDMIX_CTR_OUTWIDTH_SHIFT, width_sel),

SOC_ENUM_SINGLE_S(FSL_AUDMIX_CTR, FSL_AUDMIX_CTR_MASKRTDF_SHIFT, mask_sel),

SOC_ENUM_SINGLE_S(FSL_AUDMIX_CTR, FSL_AUDMIX_CTR_MASKCKDF_SHIFT, mask_sel),

SOC_ENUM_SINGLE_S(FSL_AUDMIX_CTR, FSL_AUDMIX_CTR_SYNCMODE_SHIFT, endis_sel),

SOC_ENUM_SINGLE_S(FSL_AUDMIX_CTR, FSL_AUDMIX_CTR_SYNCSRC_SHIFT, tdm_sel),

/* FSL_AUDMIX_ATCR0 enums */

SOC_ENUM_SINGLE_S(FSL_AUDMIX_ATCR0, 0, endis_sel),

SOC_ENUM_SINGLE_S(FSL_AUDMIX_ATCR0, 1, updn_sel),

/* FSL_AUDMIX_ATCR1 enums */

SOC_ENUM_SINGLE_S(FSL_AUDMIX_ATCR1, 0, endis_sel),

SOC_ENUM_SINGLE_S(FSL_AUDMIX_ATCR1, 1, updn_sel),

};



struct fsl_audmix_state {

	u8 tdms;

	u8 clk;

	char msg[64];

};



static const struct fsl_audmix_state prms[4][4] = {{

	/* DIS->DIS, do nothing */

	{ .tdms = 0, .clk = 0, .msg = "" },

	/* DIS->TDM1*/

	{ .tdms = 1, .clk = 1, .msg = "DIS->TDM1: TDM1 not started!\n" },

	/* DIS->TDM2*/

	{ .tdms = 2, .clk = 2, .msg = "DIS->TDM2: TDM2 not started!\n" },

	/* DIS->MIX */

	{ .tdms = 3, .clk = 0, .msg = "DIS->MIX: Please start both TDMs!\n" }

}, {	/* TDM1->DIS */

	{ .tdms = 1, .clk = 0, .msg = "TDM1->DIS: TDM1 not started!\n" },

	/* TDM1->TDM1, do nothing */

	{ .tdms = 0, .clk = 0, .msg = "" },

	/* TDM1->TDM2 */

	{ .tdms = 3, .clk = 2, .msg = "TDM1->TDM2: Please start both TDMs!\n" },

	/* TDM1->MIX */

	{ .tdms = 3, .clk = 0, .msg = "TDM1->MIX: Please start both TDMs!\n" }

}, {	/* TDM2->DIS */

	{ .tdms = 2, .clk = 0, .msg = "TDM2->DIS: TDM2 not started!\n" },

	/* TDM2->TDM1 */

	{ .tdms = 3, .clk = 1, .msg = "TDM2->TDM1: Please start both TDMs!\n" },

	/* TDM2->TDM2, do nothing */

	{ .tdms = 0, .clk = 0, .msg = "" },

	/* TDM2->MIX */

	{ .tdms = 3, .clk = 0, .msg = "TDM2->MIX: Please start both TDMs!\n" }

}, {	/* MIX->DIS */

	{ .tdms = 3, .clk = 0, .msg = "MIX->DIS: Please start both TDMs!\n" },

	/* MIX->TDM1 */

	{ .tdms = 3, .clk = 1, .msg = "MIX->TDM1: Please start both TDMs!\n" },

	/* MIX->TDM2 */

	{ .tdms = 3, .clk = 2, .msg = "MIX->TDM2: Please start both TDMs!\n" },

	/* MIX->MIX, do nothing */

	{ .tdms = 0, .clk = 0, .msg = "" }

}, };



static int fsl_audmix_state_trans(struct snd_soc_component *comp,

				  unsigned int *mask, unsigned int *ctr,

				  const struct fsl_audmix_state prm)

{

	struct fsl_audmix *priv = snd_soc_component_get_drvdata(comp);

	/* Enforce all required TDMs are started */

	if ((priv->tdms & prm.tdms) != prm.tdms) {

		dev_dbg(comp->dev, prm.msg);

		return -EINVAL;

	}



	switch (prm.clk) {

	case 1:

	case 2:

		/* Set mix clock */

		(*mask) |= FSL_AUDMIX_CTR_MIXCLK_MASK;

		(*ctr)  |= FSL_AUDMIX_CTR_MIXCLK(prm.clk - 1);

		break;

	default:

		break;

	}



	return 0;

}



static int fsl_audmix_put_mix_clk_src(struct snd_kcontrol *kcontrol,

				      struct snd_ctl_elem_value *ucontrol)

{

	struct snd_soc_component *comp = snd_kcontrol_chip(kcontrol);

	struct fsl_audmix *priv = snd_soc_component_get_drvdata(comp);

	struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;

	unsigned int *item = ucontrol->value.enumerated.item;

	unsigned int reg_val, val, mix_clk;

	int ret = 0;



	/* Get current state */

	ret = snd_soc_component_read(comp, FSL_AUDMIX_CTR, &reg_val);

	if (ret)

		return ret;



	mix_clk = ((reg_val & FSL_AUDMIX_CTR_MIXCLK_MASK)

			>> FSL_AUDMIX_CTR_MIXCLK_SHIFT);

	val = snd_soc_enum_item_to_val(e, item[0]);



	dev_dbg(comp->dev, "TDMs=x%08x, val=x%08x\n", priv->tdms, val);



	/**

	 * Ensure the current selected mixer clock is available

	 * for configuration propagation

	 */

	if (!(priv->tdms & BIT(mix_clk))) {

		dev_err(comp->dev,

			"Started TDM%d needed for config propagation!\n",

			mix_clk + 1);

		return -EINVAL;

	}



	if (!(priv->tdms & BIT(val))) {

		dev_err(comp->dev,

			"The selected clock source has no TDM%d enabled!\n",

			val + 1);

		return -EINVAL;

	}



	return snd_soc_put_enum_double(kcontrol, ucontrol);

}



static int fsl_audmix_put_out_src(struct snd_kcontrol *kcontrol,

				  struct snd_ctl_elem_value *ucontrol)

{

	struct snd_soc_component *comp = snd_kcontrol_chip(kcontrol);

	struct fsl_audmix *priv = snd_soc_component_get_drvdata(comp);

	struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;

	unsigned int *item = ucontrol->value.enumerated.item;

	u32 out_src, mix_clk;

	unsigned int reg_val, val, mask = 0, ctr = 0;

	int ret = 0;



	/* Get current state */

	ret = snd_soc_component_read(comp, FSL_AUDMIX_CTR, &reg_val);

	if (ret)

		return ret;



	/* "From" state */

	out_src = ((reg_val & FSL_AUDMIX_CTR_OUTSRC_MASK)

			>> FSL_AUDMIX_CTR_OUTSRC_SHIFT);

	mix_clk = ((reg_val & FSL_AUDMIX_CTR_MIXCLK_MASK)

			>> FSL_AUDMIX_CTR_MIXCLK_SHIFT);



	/* "To" state */

	val = snd_soc_enum_item_to_val(e, item[0]);



	dev_dbg(comp->dev, "TDMs=x%08x, val=x%08x\n", priv->tdms, val);



	/* Check if state is changing ... */

	if (out_src == val)

		return 0;

	/**

	 * Ensure the current selected mixer clock is available

	 * for configuration propagation

	 */

	if (!(priv->tdms & BIT(mix_clk))) {

		dev_err(comp->dev,

			"Started TDM%d needed for config propagation!\n",

			mix_clk + 1);

		return -EINVAL;

	}



	/* Check state transition constraints */

	ret = fsl_audmix_state_trans(comp, &mask, &ctr, prms[out_src][val]);

	if (ret)

		return ret;



	/* Complete transition to new state */

	mask |= FSL_AUDMIX_CTR_OUTSRC_MASK;

	ctr  |= FSL_AUDMIX_CTR_OUTSRC(val);



	return snd_soc_component_update_bits(comp, FSL_AUDMIX_CTR, mask, ctr);

}



static const struct snd_kcontrol_new fsl_audmix_snd_controls[] = {

	/* FSL_AUDMIX_CTR controls */

	SOC_ENUM_EXT("Mixing Clock Source", fsl_audmix_enum[0],

		     snd_soc_get_enum_double, fsl_audmix_put_mix_clk_src),

	SOC_ENUM_EXT("Output Source", fsl_audmix_enum[1],

		     snd_soc_get_enum_double, fsl_audmix_put_out_src),

	SOC_ENUM("Output Width", fsl_audmix_enum[2]),

	SOC_ENUM("Frame Rate Diff Error", fsl_audmix_enum[3]),

	SOC_ENUM("Clock Freq Diff Error", fsl_audmix_enum[4]),

	SOC_ENUM("Sync Mode Config", fsl_audmix_enum[5]),

	SOC_ENUM("Sync Mode Clk Source", fsl_audmix_enum[6]),

	/* TDM1 Attenuation controls */

	SOC_ENUM("TDM1 Attenuation", fsl_audmix_enum[7]),

	SOC_ENUM("TDM1 Attenuation Direction", fsl_audmix_enum[8]),

	SOC_SINGLE("TDM1 Attenuation Step Divider", FSL_AUDMIX_ATCR0,

		   2, 0x00fff, 0),

	SOC_SINGLE("TDM1 Attenuation Initial Value", FSL_AUDMIX_ATIVAL0,

		   0, 0x3ffff, 0),

	SOC_SINGLE("TDM1 Attenuation Step Up Factor", FSL_AUDMIX_ATSTPUP0,

		   0, 0x3ffff, 0),

	SOC_SINGLE("TDM1 Attenuation Step Down Factor", FSL_AUDMIX_ATSTPDN0,

		   0, 0x3ffff, 0),

	SOC_SINGLE("TDM1 Attenuation Step Target", FSL_AUDMIX_ATSTPTGT0,

		   0, 0x3ffff, 0),

	/* TDM2 Attenuation controls */

	SOC_ENUM("TDM2 Attenuation", fsl_audmix_enum[9]),

	SOC_ENUM("TDM2 Attenuation Direction", fsl_audmix_enum[10]),

	SOC_SINGLE("TDM2 Attenuation Step Divider", FSL_AUDMIX_ATCR1,

		   2, 0x00fff, 0),

	SOC_SINGLE("TDM2 Attenuation Initial Value", FSL_AUDMIX_ATIVAL1,

		   0, 0x3ffff, 0),

	SOC_SINGLE("TDM2 Attenuation Step Up Factor", FSL_AUDMIX_ATSTPUP1,

		   0, 0x3ffff, 0),

	SOC_SINGLE("TDM2 Attenuation Step Down Factor", FSL_AUDMIX_ATSTPDN1,

		   0, 0x3ffff, 0),

	SOC_SINGLE("TDM2 Attenuation Step Target", FSL_AUDMIX_ATSTPTGT1,

		   0, 0x3ffff, 0),

};



static int fsl_audmix_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)

{

	struct snd_soc_component *comp = dai->component;

	u32 mask = 0, ctr = 0;



	/* AUDMIX is working in DSP_A format only */

	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {

	case SND_SOC_DAIFMT_DSP_A:

		break;

	default:

		return -EINVAL;

	}



	/* For playback the AUDMIX is slave, and for record is master */

	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {

	case SND_SOC_DAIFMT_CBM_CFM:

	case SND_SOC_DAIFMT_CBS_CFS:

		break;

	default:

		return -EINVAL;

	}



	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {

	case SND_SOC_DAIFMT_IB_NF:

		/* Output data will be written on positive edge of the clock */

		ctr |= FSL_AUDMIX_CTR_OUTCKPOL(0);

		break;

	case SND_SOC_DAIFMT_NB_NF:

		/* Output data will be written on negative edge of the clock */

		ctr |= FSL_AUDMIX_CTR_OUTCKPOL(1);

		break;

	default:

		return -EINVAL;

	}



	mask |= FSL_AUDMIX_CTR_OUTCKPOL_MASK;



	return snd_soc_component_update_bits(comp, FSL_AUDMIX_CTR, mask, ctr);

}



static int fsl_audmix_dai_trigger(struct snd_pcm_substream *substream, int cmd,

				  struct snd_soc_dai *dai)

{

	struct fsl_audmix *priv = snd_soc_dai_get_drvdata(dai);



	/* Capture stream shall not be handled */

	if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)

		return 0;



	switch (cmd) {

	case SNDRV_PCM_TRIGGER_START:

	case SNDRV_PCM_TRIGGER_RESUME:

	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:

		priv->tdms |= BIT(dai->driver->id);

		break;

	case SNDRV_PCM_TRIGGER_STOP:

	case SNDRV_PCM_TRIGGER_SUSPEND:

	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:

		priv->tdms &= ~BIT(dai->driver->id);

		break;

	default:

		return -EINVAL;

	}



	return 0;

}



static const struct snd_soc_dai_ops fsl_audmix_dai_ops = {

	.set_fmt      = fsl_audmix_dai_set_fmt,

	.trigger      = fsl_audmix_dai_trigger,

};



static struct snd_soc_dai_driver fsl_audmix_dai[] = {

	{

		.id   = 0,

		.name = "audmix-0",

		.playback = {

			.stream_name = "AUDMIX-Playback-0",

			.channels_min = 8,

			.channels_max = 8,

			.rate_min = 8000,

			.rate_max = 96000,

			.rates = SNDRV_PCM_RATE_8000_96000,

			.formats = FSL_AUDMIX_FORMATS,

		},

		.capture = {

			.stream_name = "AUDMIX-Capture-0",

			.channels_min = 8,

			.channels_max = 8,

			.rate_min = 8000,

			.rate_max = 96000,

			.rates = SNDRV_PCM_RATE_8000_96000,

			.formats = FSL_AUDMIX_FORMATS,

		},

		.ops = &fsl_audmix_dai_ops,

	},

	{

		.id   = 1,

		.name = "audmix-1",

		.playback = {

			.stream_name = "AUDMIX-Playback-1",

			.channels_min = 8,

			.channels_max = 8,

			.rate_min = 8000,

			.rate_max = 96000,

			.rates = SNDRV_PCM_RATE_8000_96000,

			.formats = FSL_AUDMIX_FORMATS,

		},

		.capture = {

			.stream_name = "AUDMIX-Capture-1",

			.channels_min = 8,

			.channels_max = 8,

			.rate_min = 8000,

			.rate_max = 96000,

			.rates = SNDRV_PCM_RATE_8000_96000,

			.formats = FSL_AUDMIX_FORMATS,

		},

		.ops = &fsl_audmix_dai_ops,

	},

};



static const struct snd_soc_component_driver fsl_audmix_component = {

	.name		  = "fsl-audmix-dai",

	.controls	  = fsl_audmix_snd_controls,

	.num_controls	  = ARRAY_SIZE(fsl_audmix_snd_controls),

};



static bool fsl_audmix_readable_reg(struct device *dev, unsigned int reg)

{

	switch (reg) {

	case FSL_AUDMIX_CTR:

	case FSL_AUDMIX_STR:

	case FSL_AUDMIX_ATCR0:

	case FSL_AUDMIX_ATIVAL0:

	case FSL_AUDMIX_ATSTPUP0:

	case FSL_AUDMIX_ATSTPDN0:

	case FSL_AUDMIX_ATSTPTGT0:

	case FSL_AUDMIX_ATTNVAL0:

	case FSL_AUDMIX_ATSTP0:

	case FSL_AUDMIX_ATCR1:

	case FSL_AUDMIX_ATIVAL1:

	case FSL_AUDMIX_ATSTPUP1:

	case FSL_AUDMIX_ATSTPDN1:

	case FSL_AUDMIX_ATSTPTGT1:

	case FSL_AUDMIX_ATTNVAL1:

	case FSL_AUDMIX_ATSTP1:

		return true;

	default:

		return false;

	}

}



static bool fsl_audmix_writeable_reg(struct device *dev, unsigned int reg)

{

	switch (reg) {

	case FSL_AUDMIX_CTR:

	case FSL_AUDMIX_ATCR0:

	case FSL_AUDMIX_ATIVAL0:

	case FSL_AUDMIX_ATSTPUP0:

	case FSL_AUDMIX_ATSTPDN0:

	case FSL_AUDMIX_ATSTPTGT0:

	case FSL_AUDMIX_ATCR1:

	case FSL_AUDMIX_ATIVAL1:

	case FSL_AUDMIX_ATSTPUP1:

	case FSL_AUDMIX_ATSTPDN1:

	case FSL_AUDMIX_ATSTPTGT1:

		return true;

	default:

		return false;

	}

}



static const struct reg_default fsl_audmix_reg[] = {

	{ FSL_AUDMIX_CTR,       0x00060 },

	{ FSL_AUDMIX_STR,       0x00003 },

	{ FSL_AUDMIX_ATCR0,     0x00000 },

	{ FSL_AUDMIX_ATIVAL0,   0x3FFFF },

	{ FSL_AUDMIX_ATSTPUP0,  0x2AAAA },

	{ FSL_AUDMIX_ATSTPDN0,  0x30000 },

	{ FSL_AUDMIX_ATSTPTGT0, 0x00010 },

	{ FSL_AUDMIX_ATTNVAL0,  0x00000 },

	{ FSL_AUDMIX_ATSTP0,    0x00000 },

	{ FSL_AUDMIX_ATCR1,     0x00000 },

	{ FSL_AUDMIX_ATIVAL1,   0x3FFFF },

	{ FSL_AUDMIX_ATSTPUP1,  0x2AAAA },

	{ FSL_AUDMIX_ATSTPDN1,  0x30000 },

	{ FSL_AUDMIX_ATSTPTGT1, 0x00010 },

	{ FSL_AUDMIX_ATTNVAL1,  0x00000 },

	{ FSL_AUDMIX_ATSTP1,    0x00000 },

};



static const struct regmap_config fsl_audmix_regmap_config = {

	.reg_bits = 32,

	.reg_stride = 4,

	.val_bits = 32,

	.max_register = FSL_AUDMIX_ATSTP1,

	.reg_defaults = fsl_audmix_reg,

	.num_reg_defaults = ARRAY_SIZE(fsl_audmix_reg),

	.readable_reg = fsl_audmix_readable_reg,

	.writeable_reg = fsl_audmix_writeable_reg,

	.cache_type = REGCACHE_FLAT,

};



static int fsl_audmix_probe(struct platform_device *pdev)

{

	struct fsl_audmix *priv;

	struct resource *res;

	void __iomem *regs;

	int ret;

	const char *sprop;



	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);

	if (!priv)

		return -ENOMEM;



	/* Get the addresses */

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);

	regs = devm_ioremap_resource(&pdev->dev, res);

	if (IS_ERR(regs))

		return PTR_ERR(regs);



	priv->regmap = devm_regmap_init_mmio_clk(&pdev->dev, "ipg", regs,

						 &fsl_audmix_regmap_config);

	if (IS_ERR(priv->regmap)) {

		dev_err(&pdev->dev, "failed to init regmap\n");

		return PTR_ERR(priv->regmap);

	}



	priv->ipg_clk = devm_clk_get(&pdev->dev, "ipg");

	if (IS_ERR(priv->ipg_clk)) {

		dev_err(&pdev->dev, "failed to get ipg clock\n");

		return PTR_ERR(priv->ipg_clk);

	}



	platform_set_drvdata(pdev, priv);

	pm_runtime_enable(&pdev->dev);



	ret = devm_snd_soc_register_component(&pdev->dev, &fsl_audmix_component,

					      fsl_audmix_dai,

					      ARRAY_SIZE(fsl_audmix_dai));

	if (ret) {

		dev_err(&pdev->dev, "failed to register ASoC DAI\n");

		return ret;

	}



	sprop = of_get_property(pdev->dev.of_node, "model", NULL);

	if (sprop) {

		priv->pdev = platform_device_register_data(&pdev->dev, sprop, 0,

							   NULL, 0);

		if (IS_ERR(priv->pdev)) {

			ret = PTR_ERR(priv->pdev);

			dev_err(&pdev->dev,

				"failed to register platform %s: %d\n", sprop,

				 ret);

		}

	} else {

		dev_err(&pdev->dev, "[model] attribute missing.\n");

		ret = -EINVAL;

	}



	return ret;

}



static int fsl_audmix_remove(struct platform_device *pdev)

{

	struct fsl_audmix *priv = dev_get_drvdata(&pdev->dev);



	if (priv->pdev)

		platform_device_unregister(priv->pdev);



	return 0;

}



#ifdef CONFIG_PM

static int fsl_audmix_runtime_resume(struct device *dev)

{

	struct fsl_audmix *priv = dev_get_drvdata(dev);

	int ret;



	ret = clk_prepare_enable(priv->ipg_clk);

	if (ret) {

		dev_err(dev, "Failed to enable IPG clock: %d\n", ret);

		return ret;

	}



	regcache_cache_only(priv->regmap, false);

	regcache_mark_dirty(priv->regmap);



	return regcache_sync(priv->regmap);

}



static int fsl_audmix_runtime_suspend(struct device *dev)

{

	struct fsl_audmix *priv = dev_get_drvdata(dev);



	regcache_cache_only(priv->regmap, true);



	clk_disable_unprepare(priv->ipg_clk);



	return 0;

}

#endif /* CONFIG_PM */



static const struct dev_pm_ops fsl_audmix_pm = {

	SET_RUNTIME_PM_OPS(fsl_audmix_runtime_suspend,

			   fsl_audmix_runtime_resume,

			   NULL)

	SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,

				pm_runtime_force_resume)

};



static const struct of_device_id fsl_audmix_ids[] = {

	{ .compatible = "fsl,imx8qm-audmix", },

	{ /* sentinel */ }

};

MODULE_DEVICE_TABLE(of, fsl_audmix_ids);



static struct platform_driver fsl_audmix_driver = {

	.probe = fsl_audmix_probe,

	.remove = fsl_audmix_remove,

	.driver = {

		.name = "fsl-audmix",

		.of_match_table = fsl_audmix_ids,

		.pm = &fsl_audmix_pm,

	},

};

module_platform_driver(fsl_audmix_driver);



MODULE_DESCRIPTION("NXP AUDMIX ASoC DAI driver");

MODULE_AUTHOR("Viorel Suman <viorel.suman@nxp.com>");

MODULE_ALIAS("platform:fsl-audmix");

MODULE_LICENSE("GPL v2");

sound/soc/fsl/fsl_audmix.h

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/* SPDX-License-Identifier: GPL-2.0 */

/*

 * NXP AUDMIX ALSA SoC Digital Audio Interface (DAI) driver

 *

 * Copyright 2017 NXP

 */



#ifndef __FSL_AUDMIX_H

#define __FSL_AUDMIX_H



#define FSL_AUDMIX_FORMATS (SNDRV_PCM_FMTBIT_S16_LE |\

			SNDRV_PCM_FMTBIT_S24_LE |\

			SNDRV_PCM_FMTBIT_S32_LE)

/* AUDMIX Registers */

#define FSL_AUDMIX_CTR		0x200 /* Control */

#define FSL_AUDMIX_STR		0x204 /* Status */



#define FSL_AUDMIX_ATCR0	0x208 /* Attenuation Control */

#define FSL_AUDMIX_ATIVAL0	0x20c /* Attenuation Initial Value */

#define FSL_AUDMIX_ATSTPUP0	0x210 /* Attenuation step up factor */

#define FSL_AUDMIX_ATSTPDN0	0x214 /* Attenuation step down factor */

#define FSL_AUDMIX_ATSTPTGT0	0x218 /* Attenuation step target */

#define FSL_AUDMIX_ATTNVAL0	0x21c /* Attenuation Value */

#define FSL_AUDMIX_ATSTP0	0x220 /* Attenuation step number */



#define FSL_AUDMIX_ATCR1	0x228 /* Attenuation Control */

#define FSL_AUDMIX_ATIVAL1	0x22c /* Attenuation Initial Value */

#define FSL_AUDMIX_ATSTPUP1	0x230 /* Attenuation step up factor */

#define FSL_AUDMIX_ATSTPDN1	0x234 /* Attenuation step down factor */

#define FSL_AUDMIX_ATSTPTGT1	0x238 /* Attenuation step target */

#define FSL_AUDMIX_ATTNVAL1	0x23c /* Attenuation Value */

#define FSL_AUDMIX_ATSTP1	0x240 /* Attenuation step number */



/* AUDMIX Control Register */

#define FSL_AUDMIX_CTR_MIXCLK_SHIFT	0

#define FSL_AUDMIX_CTR_MIXCLK_MASK	BIT(FSL_AUDMIX_CTR_MIXCLK_SHIFT)

#define FSL_AUDMIX_CTR_MIXCLK(i)	((i) << FSL_AUDMIX_CTR_MIXCLK_SHIFT)

#define FSL_AUDMIX_CTR_OUTSRC_SHIFT	1

#define FSL_AUDMIX_CTR_OUTSRC_MASK	(0x3 << FSL_AUDMIX_CTR_OUTSRC_SHIFT)

#define FSL_AUDMIX_CTR_OUTSRC(i)	(((i) << FSL_AUDMIX_CTR_OUTSRC_SHIFT)\

					      & FSL_AUDMIX_CTR_OUTSRC_MASK)

#define FSL_AUDMIX_CTR_OUTWIDTH_SHIFT	3

#define FSL_AUDMIX_CTR_OUTWIDTH_MASK	(0x7 << FSL_AUDMIX_CTR_OUTWIDTH_SHIFT)

#define FSL_AUDMIX_CTR_OUTWIDTH(i)	(((i) << FSL_AUDMIX_CTR_OUTWIDTH_SHIFT)\

					      & FSL_AUDMIX_CTR_OUTWIDTH_MASK)

#define FSL_AUDMIX_CTR_OUTCKPOL_SHIFT	6

#define FSL_AUDMIX_CTR_OUTCKPOL_MASK	BIT(FSL_AUDMIX_CTR_OUTCKPOL_SHIFT)

#define FSL_AUDMIX_CTR_OUTCKPOL(i)	((i) << FSL_AUDMIX_CTR_OUTCKPOL_SHIFT)

#define FSL_AUDMIX_CTR_MASKRTDF_SHIFT	7

#define FSL_AUDMIX_CTR_MASKRTDF_MASK	BIT(FSL_AUDMIX_CTR_MASKRTDF_SHIFT)

#define FSL_AUDMIX_CTR_MASKRTDF(i)	((i) << FSL_AUDMIX_CTR_MASKRTDF_SHIFT)

#define FSL_AUDMIX_CTR_MASKCKDF_SHIFT	8

#define FSL_AUDMIX_CTR_MASKCKDF_MASK	BIT(FSL_AUDMIX_CTR_MASKCKDF_SHIFT)

#define FSL_AUDMIX_CTR_MASKCKDF(i)	((i) << FSL_AUDMIX_CTR_MASKCKDF_SHIFT)

#define FSL_AUDMIX_CTR_SYNCMODE_SHIFT	9

#define FSL_AUDMIX_CTR_SYNCMODE_MASK	BIT(FSL_AUDMIX_CTR_SYNCMODE_SHIFT)

#define FSL_AUDMIX_CTR_SYNCMODE(i)	((i) << FSL_AUDMIX_CTR_SYNCMODE_SHIFT)

#define FSL_AUDMIX_CTR_SYNCSRC_SHIFT	10

#define FSL_AUDMIX_CTR_SYNCSRC_MASK	BIT(FSL_AUDMIX_CTR_SYNCSRC_SHIFT)

#define FSL_AUDMIX_CTR_SYNCSRC(i)	((i) << FSL_AUDMIX_CTR_SYNCSRC_SHIFT)



/* AUDMIX Status Register */

#define FSL_AUDMIX_STR_RATEDIFF		BIT(0)

#define FSL_AUDMIX_STR_CLKDIFF		BIT(1)

#define FSL_AUDMIX_STR_MIXSTAT_SHIFT	2

#define FSL_AUDMIX_STR_MIXSTAT_MASK	(0x3 << FSL_AUDMIX_STR_MIXSTAT_SHIFT)

#define FSL_AUDMIX_STR_MIXSTAT(i)	(((i) & FSL_AUDMIX_STR_MIXSTAT_MASK) \

					   >> FSL_AUDMIX_STR_MIXSTAT_SHIFT)

/* AUDMIX Attenuation Control Register */

#define FSL_AUDMIX_ATCR_AT_EN		BIT(0)

#define FSL_AUDMIX_ATCR_AT_UPDN		BIT(1)

#define FSL_AUDMIX_ATCR_ATSTPDIF_SHIFT	2

#define FSL_AUDMIX_ATCR_ATSTPDFI_MASK	\

				(0xfff << FSL_AUDMIX_ATCR_ATSTPDIF_SHIFT)



/* AUDMIX Attenuation Initial Value Register */

#define FSL_AUDMIX_ATIVAL_ATINVAL_MASK	0x3FFFF



/* AUDMIX Attenuation Step Up Factor Register */

#define FSL_AUDMIX_ATSTPUP_ATSTEPUP_MASK	0x3FFFF



/* AUDMIX Attenuation Step Down Factor Register */

#define FSL_AUDMIX_ATSTPDN_ATSTEPDN_MASK	0x3FFFF



/* AUDMIX Attenuation Step Target Register */

#define FSL_AUDMIX_ATSTPTGT_ATSTPTG_MASK	0x3FFFF



/* AUDMIX Attenuation Value Register */

#define FSL_AUDMIX_ATTNVAL_ATCURVAL_MASK	0x3FFFF



/* AUDMIX Attenuation Step Number Register */

#define FSL_AUDMIX_ATSTP_STPCTR_MASK	0x3FFFF



#define FSL_AUDMIX_MAX_DAIS		2

struct fsl_audmix {

	struct platform_device *pdev;

	struct regmap *regmap;

	struct clk *ipg_clk;

	u8 tdms;

};



#endif /* __FSL_AUDMIX_H */