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linux-stable/sound/soc/tegra/tegra210_ope.c
Uwe Kleine-König 37831f8c14
ASoC: tegra: tegra210_ope: Convert to platform remove callback returning void 
The .remove() callback for a platform driver returns an int which makes
many driver authors wrongly assume it's possible to do error handling by
returning an error code. However the value returned is (mostly) ignored
and this typically results in resource leaks. To improve here there is a
quest to make the remove callback return void. In the first step of this
quest all drivers are converted to .remove_new() which already returns
void.

Trivially convert this driver from always returning zero in the remove
callback to the void returning variant.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: Takashi Iwai <tiwai@suse.de>
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Link: https://lore.kernel.org/r/20230315150745.67084-158-u.kleine-koenig@pengutronix.de
Signed-off-by: Mark Brown <broonie@kernel.org>
2023-03-20 13:09:22 +00:00

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// SPDX-License-Identifier: GPL-2.0-only
//
// tegra210_ope.c - Tegra210 OPE driver
//
// Copyright (c) 2022, NVIDIA CORPORATION. All rights reserved.
#include <linux/clk.h>
#include <linux/device.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/regmap.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include "tegra210_mbdrc.h"
#include "tegra210_ope.h"
#include "tegra210_peq.h"
#include "tegra_cif.h"
static const struct reg_default tegra210_ope_reg_defaults[] = {
{ TEGRA210_OPE_RX_INT_MASK, 0x00000001},
{ TEGRA210_OPE_RX_CIF_CTRL, 0x00007700},
{ TEGRA210_OPE_TX_INT_MASK, 0x00000001},
{ TEGRA210_OPE_TX_CIF_CTRL, 0x00007700},
{ TEGRA210_OPE_CG, 0x1},
};
static int tegra210_ope_set_audio_cif(struct tegra210_ope *ope,
struct snd_pcm_hw_params *params,
unsigned int reg)
{
int channels, audio_bits;
struct tegra_cif_conf cif_conf;
memset(&cif_conf, 0, sizeof(struct tegra_cif_conf));
channels = params_channels(params);
if (channels < 2)
return -EINVAL;
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_S16_LE:
audio_bits = TEGRA_ACIF_BITS_16;
break;
case SNDRV_PCM_FORMAT_S32_LE:
audio_bits = TEGRA_ACIF_BITS_32;
break;
default:
return -EINVAL;
}
cif_conf.audio_ch = channels;
cif_conf.client_ch = channels;
cif_conf.audio_bits = audio_bits;
cif_conf.client_bits = audio_bits;
tegra_set_cif(ope->regmap, reg, &cif_conf);
return 0;
}
static int tegra210_ope_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct device *dev = dai->dev;
struct tegra210_ope *ope = snd_soc_dai_get_drvdata(dai);
int err;
/* Set RX and TX CIF */
err = tegra210_ope_set_audio_cif(ope, params,
TEGRA210_OPE_RX_CIF_CTRL);
if (err) {
dev_err(dev, "Can't set OPE RX CIF: %d\n", err);
return err;
}
err = tegra210_ope_set_audio_cif(ope, params,
TEGRA210_OPE_TX_CIF_CTRL);
if (err) {
dev_err(dev, "Can't set OPE TX CIF: %d\n", err);
return err;
}
tegra210_mbdrc_hw_params(dai->component);
return err;
}
static int tegra210_ope_component_probe(struct snd_soc_component *cmpnt)
{
struct tegra210_ope *ope = dev_get_drvdata(cmpnt->dev);
tegra210_peq_component_init(cmpnt);
tegra210_mbdrc_component_init(cmpnt);
/*
* The OPE, PEQ and MBDRC functionalities are combined under one
* device registered by OPE driver. In fact OPE HW block includes
* sub blocks PEQ and MBDRC. However driver registers separate
* regmap interfaces for each of these. ASoC core depends on
* dev_get_regmap() to populate the regmap field for a given ASoC
* component. A component can have one regmap reference and since
* the DAPM routes depend on OPE regmap only, below explicit
* assignment is done to highlight this. This is needed for ASoC
* core to access correct regmap during DAPM path setup.
*/
snd_soc_component_init_regmap(cmpnt, ope->regmap);
return 0;
}
static const struct snd_soc_dai_ops tegra210_ope_dai_ops = {
.hw_params = tegra210_ope_hw_params,
};
static struct snd_soc_dai_driver tegra210_ope_dais[] = {
{
.name = "OPE-RX-CIF",
.playback = {
.stream_name = "RX-CIF-Playback",
.channels_min = 1,
.channels_max = 8,
.rates = SNDRV_PCM_RATE_8000_192000,
.formats = SNDRV_PCM_FMTBIT_S8 |
SNDRV_PCM_FMTBIT_S16_LE |
SNDRV_PCM_FMTBIT_S32_LE,
},
.capture = {
.stream_name = "RX-CIF-Capture",
.channels_min = 1,
.channels_max = 8,
.rates = SNDRV_PCM_RATE_8000_192000,
.formats = SNDRV_PCM_FMTBIT_S8 |
SNDRV_PCM_FMTBIT_S16_LE |
SNDRV_PCM_FMTBIT_S32_LE,
},
},
{
.name = "OPE-TX-CIF",
.playback = {
.stream_name = "TX-CIF-Playback",
.channels_min = 1,
.channels_max = 8,
.rates = SNDRV_PCM_RATE_8000_192000,
.formats = SNDRV_PCM_FMTBIT_S8 |
SNDRV_PCM_FMTBIT_S16_LE |
SNDRV_PCM_FMTBIT_S32_LE,
},
.capture = {
.stream_name = "TX-CIF-Capture",
.channels_min = 1,
.channels_max = 8,
.rates = SNDRV_PCM_RATE_8000_192000,
.formats = SNDRV_PCM_FMTBIT_S8 |
SNDRV_PCM_FMTBIT_S16_LE |
SNDRV_PCM_FMTBIT_S32_LE,
},
.ops = &tegra210_ope_dai_ops,
}
};
static const struct snd_soc_dapm_widget tegra210_ope_widgets[] = {
SND_SOC_DAPM_AIF_IN("RX", NULL, 0, SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_AIF_OUT("TX", NULL, 0, TEGRA210_OPE_ENABLE,
TEGRA210_OPE_EN_SHIFT, 0),
};
#define OPE_ROUTES(sname) \
{ "RX XBAR-" sname, NULL, "XBAR-TX" }, \
{ "RX-CIF-" sname, NULL, "RX XBAR-" sname }, \
{ "RX", NULL, "RX-CIF-" sname }, \
{ "TX-CIF-" sname, NULL, "TX" }, \
{ "TX XBAR-" sname, NULL, "TX-CIF-" sname }, \
{ "XBAR-RX", NULL, "TX XBAR-" sname }
static const struct snd_soc_dapm_route tegra210_ope_routes[] = {
{ "TX", NULL, "RX" },
OPE_ROUTES("Playback"),
OPE_ROUTES("Capture"),
};
static const char * const tegra210_ope_data_dir_text[] = {
"MBDRC to PEQ",
"PEQ to MBDRC"
};
static const struct soc_enum tegra210_ope_data_dir_enum =
SOC_ENUM_SINGLE(TEGRA210_OPE_DIR, TEGRA210_OPE_DIR_SHIFT,
2, tegra210_ope_data_dir_text);
static int tegra210_ope_get_data_dir(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_component *cmpnt = snd_soc_kcontrol_component(kcontrol);
struct tegra210_ope *ope = snd_soc_component_get_drvdata(cmpnt);
ucontrol->value.enumerated.item[0] = ope->data_dir;
return 0;
}
static int tegra210_ope_put_data_dir(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_component *cmpnt = snd_soc_kcontrol_component(kcontrol);
struct tegra210_ope *ope = snd_soc_component_get_drvdata(cmpnt);
unsigned int value = ucontrol->value.enumerated.item[0];
if (value == ope->data_dir)
return 0;
ope->data_dir = value;
return 1;
}
static const struct snd_kcontrol_new tegra210_ope_controls[] = {
SOC_ENUM_EXT("Data Flow Direction", tegra210_ope_data_dir_enum,
tegra210_ope_get_data_dir, tegra210_ope_put_data_dir),
};
static const struct snd_soc_component_driver tegra210_ope_cmpnt = {
.probe = tegra210_ope_component_probe,
.dapm_widgets = tegra210_ope_widgets,
.num_dapm_widgets = ARRAY_SIZE(tegra210_ope_widgets),
.dapm_routes = tegra210_ope_routes,
.num_dapm_routes = ARRAY_SIZE(tegra210_ope_routes),
.controls = tegra210_ope_controls,
.num_controls = ARRAY_SIZE(tegra210_ope_controls),
};
static bool tegra210_ope_wr_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
case TEGRA210_OPE_RX_INT_MASK ... TEGRA210_OPE_RX_CIF_CTRL:
case TEGRA210_OPE_TX_INT_MASK ... TEGRA210_OPE_TX_CIF_CTRL:
case TEGRA210_OPE_ENABLE ... TEGRA210_OPE_CG:
case TEGRA210_OPE_DIR:
return true;
default:
return false;
}
}
static bool tegra210_ope_rd_reg(struct device *dev, unsigned int reg)
{
if (tegra210_ope_wr_reg(dev, reg))
return true;
switch (reg) {
case TEGRA210_OPE_RX_STATUS:
case TEGRA210_OPE_RX_INT_STATUS:
case TEGRA210_OPE_TX_STATUS:
case TEGRA210_OPE_TX_INT_STATUS:
case TEGRA210_OPE_STATUS:
case TEGRA210_OPE_INT_STATUS:
return true;
default:
return false;
}
}
static bool tegra210_ope_volatile_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
case TEGRA210_OPE_RX_STATUS:
case TEGRA210_OPE_RX_INT_STATUS:
case TEGRA210_OPE_TX_STATUS:
case TEGRA210_OPE_TX_INT_STATUS:
case TEGRA210_OPE_SOFT_RESET:
case TEGRA210_OPE_STATUS:
case TEGRA210_OPE_INT_STATUS:
return true;
default:
return false;
}
}
static const struct regmap_config tegra210_ope_regmap_config = {
.reg_bits = 32,
.reg_stride = 4,
.val_bits = 32,
.max_register = TEGRA210_OPE_DIR,
.writeable_reg = tegra210_ope_wr_reg,
.readable_reg = tegra210_ope_rd_reg,
.volatile_reg = tegra210_ope_volatile_reg,
.reg_defaults = tegra210_ope_reg_defaults,
.num_reg_defaults = ARRAY_SIZE(tegra210_ope_reg_defaults),
.cache_type = REGCACHE_FLAT,
};
static int tegra210_ope_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct tegra210_ope *ope;
void __iomem *regs;
int err;
ope = devm_kzalloc(dev, sizeof(*ope), GFP_KERNEL);
if (!ope)
return -ENOMEM;
regs = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(regs))
return PTR_ERR(regs);
ope->regmap = devm_regmap_init_mmio(dev, regs,
&tegra210_ope_regmap_config);
if (IS_ERR(ope->regmap)) {
dev_err(dev, "regmap init failed\n");
return PTR_ERR(ope->regmap);
}
regcache_cache_only(ope->regmap, true);
dev_set_drvdata(dev, ope);
err = tegra210_peq_regmap_init(pdev);
if (err < 0) {
dev_err(dev, "PEQ init failed\n");
return err;
}
err = tegra210_mbdrc_regmap_init(pdev);
if (err < 0) {
dev_err(dev, "MBDRC init failed\n");
return err;
}
err = devm_snd_soc_register_component(dev, &tegra210_ope_cmpnt,
tegra210_ope_dais,
ARRAY_SIZE(tegra210_ope_dais));
if (err) {
dev_err(dev, "can't register OPE component, err: %d\n", err);
return err;
}
pm_runtime_enable(dev);
return 0;
}
static void tegra210_ope_remove(struct platform_device *pdev)
{
pm_runtime_disable(&pdev->dev);
}
static int __maybe_unused tegra210_ope_runtime_suspend(struct device *dev)
{
struct tegra210_ope *ope = dev_get_drvdata(dev);
tegra210_peq_save(ope->peq_regmap, ope->peq_biquad_gains,
ope->peq_biquad_shifts);
regcache_cache_only(ope->mbdrc_regmap, true);
regcache_cache_only(ope->peq_regmap, true);
regcache_cache_only(ope->regmap, true);
regcache_mark_dirty(ope->regmap);
regcache_mark_dirty(ope->peq_regmap);
regcache_mark_dirty(ope->mbdrc_regmap);
return 0;
}
static int __maybe_unused tegra210_ope_runtime_resume(struct device *dev)
{
struct tegra210_ope *ope = dev_get_drvdata(dev);
regcache_cache_only(ope->regmap, false);
regcache_cache_only(ope->peq_regmap, false);
regcache_cache_only(ope->mbdrc_regmap, false);
regcache_sync(ope->regmap);
regcache_sync(ope->peq_regmap);
regcache_sync(ope->mbdrc_regmap);
tegra210_peq_restore(ope->peq_regmap, ope->peq_biquad_gains,
ope->peq_biquad_shifts);
return 0;
}
static const struct dev_pm_ops tegra210_ope_pm_ops = {
SET_RUNTIME_PM_OPS(tegra210_ope_runtime_suspend,
tegra210_ope_runtime_resume, NULL)
SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
pm_runtime_force_resume)
};
static const struct of_device_id tegra210_ope_of_match[] = {
{ .compatible = "nvidia,tegra210-ope" },
{},
};
MODULE_DEVICE_TABLE(of, tegra210_ope_of_match);
static struct platform_driver tegra210_ope_driver = {
.driver = {
.name = "tegra210-ope",
.of_match_table = tegra210_ope_of_match,
.pm = &tegra210_ope_pm_ops,
},
.probe = tegra210_ope_probe,
.remove_new = tegra210_ope_remove,
};
module_platform_driver(tegra210_ope_driver)
MODULE_AUTHOR("Sumit Bhattacharya <sumitb@nvidia.com>");
MODULE_DESCRIPTION("Tegra210 OPE ASoC driver");
MODULE_LICENSE("GPL");
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