// 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, "%s", 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;
/* Get current state */
reg_val = snd_soc_component_read(comp, FSL_AUDMIX_CTR);
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;
/* Get current state */
reg_val = snd_soc_component_read(comp, FSL_AUDMIX_CTR);
/* "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 consumer, and for record is provider */
switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
case SND_SOC_DAIFMT_BC_FC:
case SND_SOC_DAIFMT_BP_FP:
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);
unsigned long lock_flags;
/* 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:
spin_lock_irqsave(&priv->lock, lock_flags);
priv->tdms |= BIT(dai->driver->id);
spin_unlock_irqrestore(&priv->lock, lock_flags);
break;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_SUSPEND:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
spin_lock_irqsave(&priv->lock, lock_flags);
priv->tdms &= ~BIT(dai->driver->id);
spin_unlock_irqrestore(&priv->lock, lock_flags);
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,
},
.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,
},
.ops = &fsl_audmix_dai_ops,
},
{
.id = 2,
.name = "audmix-2",
.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,
},
};
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 const struct of_device_id fsl_audmix_ids[] = {
{
.compatible = "fsl,imx8qm-audmix",
},
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, fsl_audmix_ids);
static int fsl_audmix_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct fsl_audmix *priv;
void __iomem *regs;
int ret;
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
/* Get the addresses */
regs = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(regs))
return PTR_ERR(regs);
priv->regmap = devm_regmap_init_mmio(dev, regs, &fsl_audmix_regmap_config);
if (IS_ERR(priv->regmap)) {
dev_err(dev, "failed to init regmap\n");
return PTR_ERR(priv->regmap);
}
priv->ipg_clk = devm_clk_get(dev, "ipg");
if (IS_ERR(priv->ipg_clk)) {
dev_err(dev, "failed to get ipg clock\n");
return PTR_ERR(priv->ipg_clk);
}
spin_lock_init(&priv->lock);
platform_set_drvdata(pdev, priv);
pm_runtime_enable(dev);
ret = devm_snd_soc_register_component(dev, &fsl_audmix_component,
fsl_audmix_dai,
ARRAY_SIZE(fsl_audmix_dai));
if (ret) {
dev_err(dev, "failed to register ASoC DAI\n");
goto err_disable_pm;
}
priv->pdev = platform_device_register_data(dev, "imx-audmix", 0, NULL, 0);
if (IS_ERR(priv->pdev)) {
ret = PTR_ERR(priv->pdev);
dev_err(dev, "failed to register platform: %d\n", ret);
goto err_disable_pm;
}
return 0;
err_disable_pm:
pm_runtime_disable(dev);
return ret;
}
static void fsl_audmix_remove(struct platform_device *pdev)
{
struct fsl_audmix *priv = dev_get_drvdata(&pdev->dev);
pm_runtime_disable(&pdev->dev);
if (priv->pdev)
platform_device_unregister(priv->pdev);
}
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;
}
static const struct dev_pm_ops fsl_audmix_pm = {
RUNTIME_PM_OPS(fsl_audmix_runtime_suspend, fsl_audmix_runtime_resume,
NULL)
SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, pm_runtime_force_resume)
};
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 = pm_ptr(&fsl_audmix_pm),
},
};
module_platform_driver(fsl_audmix_driver);
MODULE_DESCRIPTION("NXP AUDMIX ASoC DAI driver");
MODULE_AUTHOR("Viorel Suman <[email protected]>");
MODULE_ALIAS("platform:fsl-audmix");
MODULE_LICENSE("GPL v2");
Codebase Browser
linux