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Jetpack/kernel/nvidia/sound/soc/tegra-alt/tegra210_i2s_alt.c

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/*
* tegra210_i2s.c - Tegra210 I2S driver
*
* Copyright (c) 2014-2019 NVIDIA CORPORATION. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <linux/delay.h>
#include <linux/clk.h>
#include <linux/device.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/of.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 <linux/pinctrl/pinconf-tegra.h>
#include <linux/regulator/consumer.h>
#include <linux/of_device.h>
#include <soc/tegra/chip-id.h>
#include <linux/pm_domain.h>
#include "tegra210_xbar_alt.h"
#include "tegra210_i2s_alt.h"
#define DRV_NAME "tegra210-i2s"
static const struct reg_default tegra210_i2s_reg_defaults[] = {
{ TEGRA210_I2S_AXBAR_RX_INT_MASK, 0x00000003},
{ TEGRA210_I2S_AXBAR_RX_CIF_CTRL, 0x00007700},
{ TEGRA210_I2S_AXBAR_TX_INT_MASK, 0x00000003},
{ TEGRA210_I2S_AXBAR_TX_CIF_CTRL, 0x00007700},
{ TEGRA210_I2S_CG, 0x1},
{ TEGRA210_I2S_TIMING, 0x0000001f},
};
static void tegra210_i2s_set_slot_ctrl(struct regmap *regmap,
unsigned int total_slots,
unsigned int tx_slot_mask,
unsigned int rx_slot_mask)
{
regmap_write(regmap, TEGRA210_I2S_SLOT_CTRL, total_slots - 1);
regmap_write(regmap, TEGRA210_I2S_AXBAR_TX_SLOT_CTRL,
tx_slot_mask);
regmap_write(regmap, TEGRA210_I2S_AXBAR_RX_SLOT_CTRL,
rx_slot_mask);
}
static int tegra210_i2s_set_clock_rate(struct device *dev, int clock_rate)
{
unsigned int val;
struct tegra210_i2s *i2s = dev_get_drvdata(dev);
int ret;
regmap_read(i2s->regmap, TEGRA210_I2S_CTRL, &val);
val &= TEGRA210_I2S_CTRL_MASTER_EN;
/* no need to set rates if I2S is being operated in slave */
if (!val)
return 0;
/* skip for fpga units */
if (tegra_platform_is_unit_fpga() || tegra_platform_is_fpga())
return 0;
ret = clk_set_rate(i2s->clk_i2s, clock_rate);
if (ret) {
dev_err(dev, "Can't set I2S clock rate: %d\n", ret);
return ret;
}
if (!IS_ERR(i2s->clk_sync_input)) {
/*
* other I/O modules in AHUB can use i2s bclk as reference
* clock. Below sets sync input clock rate as per bclk,
* which can be used as input to other I/O modules.
*/
ret = clk_set_rate(i2s->clk_sync_input, clock_rate);
if (ret) {
dev_err(dev, "Can't set I2S sync input clock rate\n");
return ret;
}
}
return 0;
}
static int tegra210_i2s_sw_reset(struct tegra210_i2s *i2s,
int direction, int timeout)
{
unsigned int sw_reset_reg, sw_reset_mask, sw_reset_en, sw_reset_default;
unsigned int tx_cif_ctrl, rx_cif_ctrl, tx_ctrl, rx_ctrl, ctrl, val;
int wait = timeout;
regmap_read(i2s->regmap, TEGRA210_I2S_AXBAR_TX_CIF_CTRL, &tx_cif_ctrl);
regmap_read(i2s->regmap, TEGRA210_I2S_AXBAR_RX_CIF_CTRL, &rx_cif_ctrl);
regmap_read(i2s->regmap, TEGRA210_I2S_AXBAR_TX_CTRL, &tx_ctrl);
regmap_read(i2s->regmap, TEGRA210_I2S_AXBAR_RX_CTRL, &rx_ctrl);
regmap_read(i2s->regmap, TEGRA210_I2S_CTRL, &ctrl);
if (direction == SNDRV_PCM_STREAM_PLAYBACK) {
sw_reset_reg = TEGRA210_I2S_AXBAR_RX_SOFT_RESET;
sw_reset_mask = TEGRA210_I2S_AXBAR_RX_SOFT_RESET_MASK;
sw_reset_en = TEGRA210_I2S_AXBAR_RX_SOFT_RESET_EN;
sw_reset_default = TEGRA210_I2S_AXBAR_RX_SOFT_RESET_DEFAULT;
} else {
sw_reset_reg = TEGRA210_I2S_AXBAR_TX_SOFT_RESET;
sw_reset_mask = TEGRA210_I2S_AXBAR_TX_SOFT_RESET_MASK;
sw_reset_en = TEGRA210_I2S_AXBAR_TX_SOFT_RESET_EN;
sw_reset_default = TEGRA210_I2S_AXBAR_TX_SOFT_RESET_DEFAULT;
}
regmap_update_bits(i2s->regmap, sw_reset_reg, sw_reset_mask, sw_reset_en);
do {
regmap_read(i2s->regmap, sw_reset_reg, &val);
wait--;
if (!wait)
return -EINVAL;
} while (val & sw_reset_mask);
regmap_update_bits(i2s->regmap, sw_reset_reg, sw_reset_mask, sw_reset_default);
regmap_write(i2s->regmap, TEGRA210_I2S_AXBAR_TX_CIF_CTRL, tx_cif_ctrl);
regmap_write(i2s->regmap, TEGRA210_I2S_AXBAR_RX_CIF_CTRL, rx_cif_ctrl);
regmap_write(i2s->regmap, TEGRA210_I2S_AXBAR_TX_CTRL, tx_ctrl);
regmap_write(i2s->regmap, TEGRA210_I2S_AXBAR_RX_CTRL, rx_ctrl);
regmap_write(i2s->regmap, TEGRA210_I2S_CTRL, ctrl);
return 0;
}
static int tegra210_i2s_get_status(struct tegra210_i2s *i2s,
int direction)
{
unsigned int status_reg, val;
status_reg = (direction == SNDRV_PCM_STREAM_PLAYBACK) ?
TEGRA210_I2S_AXBAR_RX_STATUS :
TEGRA210_I2S_AXBAR_TX_STATUS;
regmap_read(i2s->regmap, status_reg, &val);
val = val & 0x00000001;
return val;
}
static int tegra210_i2s_rx_stop(struct snd_soc_dapm_widget *w,
struct snd_kcontrol *kcontrol, int event)
{
struct snd_soc_codec *codec = snd_soc_dapm_to_codec(w->dapm);
struct device *dev = codec->dev;
struct tegra210_i2s *i2s = dev_get_drvdata(dev);
int dcnt = 10, ret;
/* wait until I2S RX status is disabled;
ADMAIF is first disabled followed by I2S */
while (tegra210_i2s_get_status(i2s, SNDRV_PCM_STREAM_CAPTURE) &&
dcnt--)
udelay(100);
/* HW needs sw reset to make sure previous transaction be clean */
ret = tegra210_i2s_sw_reset(i2s, SNDRV_PCM_STREAM_CAPTURE, 0xffff);
if (ret) {
dev_err(dev, "Failed at I2S%d_RX sw reset\n", dev->id);
return ret;
}
return 0;
}
static int tegra210_i2s_tx_stop(struct snd_soc_dapm_widget *w,
struct snd_kcontrol *kcontrol, int event)
{
struct snd_soc_codec *codec = snd_soc_dapm_to_codec(w->dapm);
struct device *dev = codec->dev;
struct tegra210_i2s *i2s = dev_get_drvdata(dev);
int dcnt = 10, ret;
/* wait until I2S TX status is disabled;
ADMAIF is first disabled followed by I2S */
while (tegra210_i2s_get_status(i2s, SNDRV_PCM_STREAM_PLAYBACK) &&
dcnt--)
udelay(100);
/* HW needs sw reset to make sure previous transaction be clean */
ret = tegra210_i2s_sw_reset(i2s, SNDRV_PCM_STREAM_PLAYBACK, 0xffff);
if (ret) {
dev_err(dev, "Failed at I2S%d_TX sw reset\n", dev->id);
return ret;
}
return 0;
}
static int tegra210_i2s_runtime_suspend(struct device *dev)
{
struct tegra210_i2s *i2s = dev_get_drvdata(dev);
regcache_cache_only(i2s->regmap, true);
if (!(tegra_platform_is_unit_fpga() || tegra_platform_is_fpga())) {
regcache_mark_dirty(i2s->regmap);
clk_disable_unprepare(i2s->clk_i2s);
}
return 0;
}
static int tegra210_i2s_runtime_resume(struct device *dev)
{
struct tegra210_i2s *i2s = dev_get_drvdata(dev);
int ret;
if (!(tegra_platform_is_unit_fpga() || tegra_platform_is_fpga())) {
ret = clk_prepare_enable(i2s->clk_i2s);
if (ret) {
dev_err(dev, "clk_enable failed: %d\n", ret);
return ret;
}
}
regcache_cache_only(i2s->regmap, false);
regcache_sync(i2s->regmap);
return 0;
}
static void tegra210_i2s_set_data_offset(struct tegra210_i2s *i2s,
unsigned int data_offset)
{
unsigned int reg, mask, shift;
reg = TEGRA210_I2S_AXBAR_TX_CTRL;
mask = TEGRA210_I2S_AXBAR_TX_CTRL_DATA_OFFSET_MASK;
shift = TEGRA210_I2S_AXBAR_TX_CTRL_DATA_OFFSET_SHIFT;
regmap_update_bits(i2s->regmap, reg, mask, data_offset << shift);
reg = TEGRA210_I2S_AXBAR_RX_CTRL;
mask = TEGRA210_I2S_AXBAR_RX_CTRL_DATA_OFFSET_MASK;
shift = TEGRA210_I2S_AXBAR_RX_CTRL_DATA_OFFSET_SHIFT;
regmap_update_bits(i2s->regmap, reg, mask, data_offset << shift);
}
static void tegra210_i2s_set_rjm_offset(struct tegra210_i2s *i2s,
unsigned int sample_size)
{
unsigned int data_offset;
if (i2s->bclk_ratio > 1)
data_offset = sample_size * (i2s->bclk_ratio - 1);
else
data_offset = 0;
tegra210_i2s_set_data_offset(i2s, data_offset);
}
static int tegra210_i2s_set_fmt(struct snd_soc_dai *dai,
unsigned int fmt)
{
struct tegra210_i2s *i2s = snd_soc_dai_get_drvdata(dai);
unsigned int mask, val;
mask = TEGRA210_I2S_CTRL_MASTER_EN_MASK;
switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
case SND_SOC_DAIFMT_CBS_CFS:
val = 0;
break;
case SND_SOC_DAIFMT_CBM_CFM:
val = TEGRA210_I2S_CTRL_MASTER_EN;
break;
default:
return -EINVAL;
}
mask |= TEGRA210_I2S_CTRL_FRAME_FORMAT_MASK |
TEGRA210_I2S_CTRL_LRCK_POLARITY_MASK;
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_DSP_A:
val |= TEGRA210_I2S_CTRL_FRAME_FORMAT_FSYNC_MODE;
val |= TEGRA210_I2S_CTRL_LRCK_POLARITY_HIGH;
tegra210_i2s_set_data_offset(i2s, 1);
break;
case SND_SOC_DAIFMT_DSP_B:
val |= TEGRA210_I2S_CTRL_FRAME_FORMAT_FSYNC_MODE;
val |= TEGRA210_I2S_CTRL_LRCK_POLARITY_HIGH;
tegra210_i2s_set_data_offset(i2s, 0);
break;
/* I2S mode has data offset of 1 */
case SND_SOC_DAIFMT_I2S:
val |= TEGRA210_I2S_CTRL_FRAME_FORMAT_LRCK_MODE;
val |= TEGRA210_I2S_CTRL_LRCK_POLARITY_LOW;
tegra210_i2s_set_data_offset(i2s, 1);
break;
/*
* For RJ mode data offset is dependent on the sample size
* and the bclk ratio, and so is set when hw_params is called.
*/
case SND_SOC_DAIFMT_RIGHT_J:
val |= TEGRA210_I2S_CTRL_FRAME_FORMAT_LRCK_MODE;
val |= TEGRA210_I2S_CTRL_LRCK_POLARITY_HIGH;
break;
case SND_SOC_DAIFMT_LEFT_J:
val |= TEGRA210_I2S_CTRL_FRAME_FORMAT_LRCK_MODE;
val |= TEGRA210_I2S_CTRL_LRCK_POLARITY_HIGH;
tegra210_i2s_set_data_offset(i2s, 0);
break;
default:
return -EINVAL;
}
mask |= TEGRA210_I2S_CTRL_EDGE_CTRL_MASK;
switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
case SND_SOC_DAIFMT_NB_NF:
val |= TEGRA210_I2S_CTRL_EDGE_CTRL_POS_EDGE;
break;
case SND_SOC_DAIFMT_NB_IF:
val |= TEGRA210_I2S_CTRL_EDGE_CTRL_POS_EDGE;
val ^= TEGRA210_I2S_CTRL_LRCK_POLARITY_MASK;
break;
case SND_SOC_DAIFMT_IB_NF:
val |= TEGRA210_I2S_CTRL_EDGE_CTRL_NEG_EDGE;
break;
case SND_SOC_DAIFMT_IB_IF:
val |= TEGRA210_I2S_CTRL_EDGE_CTRL_NEG_EDGE;
val ^= TEGRA210_I2S_CTRL_LRCK_POLARITY_MASK;
break;
default:
return -EINVAL;
}
regmap_update_bits(i2s->regmap, TEGRA210_I2S_CTRL, mask, val);
/* FIXME: global enabling */
regmap_update_bits(i2s->regmap, TEGRA210_I2S_ENABLE,
TEGRA210_I2S_EN_MASK, TEGRA210_I2S_EN);
regmap_update_bits(i2s->regmap, TEGRA210_I2S_CTRL,
TEGRA210_I2S_CTRL_FSYNC_WIDTH_MASK,
i2s->fsync_width << TEGRA210_I2S_CTRL_FSYNC_WIDTH_SHIFT);
i2s->format = fmt & SND_SOC_DAIFMT_FORMAT_MASK;
return 0;
}
static int tegra210_i2s_set_tdm_slot(struct snd_soc_dai *dai,
unsigned int tx_mask, unsigned int rx_mask,
int slots, int slot_width)
{
struct tegra210_i2s *i2s = snd_soc_dai_get_drvdata(dai);
/* copy the required tx and rx mask */
i2s->tx_mask = (tx_mask > 0xFFFF) ? 0xFFFF : tx_mask;
i2s->rx_mask = (rx_mask > 0xFFFF) ? 0xFFFF : rx_mask;
return 0;
}
static int tegra210_i2s_set_dai_bclk_ratio(struct snd_soc_dai *dai,
unsigned int ratio)
{
struct tegra210_i2s *i2s = snd_soc_dai_get_drvdata(dai);
i2s->bclk_ratio = ratio;
return 0;
}
static int tegra210_i2s_get_format(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
struct tegra210_i2s *i2s = snd_soc_codec_get_drvdata(codec);
/* get the format control flag */
if (strstr(kcontrol->id.name, "input"))
ucontrol->value.integer.value[0] = i2s->format_in;
else if (strstr(kcontrol->id.name, "codec"))
ucontrol->value.integer.value[0] = i2s->codec_bit_format;
else if (strstr(kcontrol->id.name, "Sample Rate"))
ucontrol->value.integer.value[0] = i2s->sample_rate_via_control;
else if (strstr(kcontrol->id.name, "Channels"))
ucontrol->value.integer.value[0] = i2s->channels_via_control;
else if (strstr(kcontrol->id.name, "Capture stereo to mono"))
ucontrol->value.integer.value[0] =
i2s->stereo_to_mono[I2S_TX_PATH];
else if (strstr(kcontrol->id.name, "Capture mono to stereo"))
ucontrol->value.integer.value[0] =
i2s->mono_to_stereo[I2S_TX_PATH];
else if (strstr(kcontrol->id.name, "Playback stereo to mono"))
ucontrol->value.integer.value[0] =
i2s->stereo_to_mono[I2S_RX_PATH];
else if (strstr(kcontrol->id.name, "Playback mono to stereo"))
ucontrol->value.integer.value[0] =
i2s->mono_to_stereo[I2S_RX_PATH];
else if (strstr(kcontrol->id.name, "Playback FIFO threshold"))
ucontrol->value.integer.value[0] = i2s->rx_fifo_th;
else if (strstr(kcontrol->id.name, "BCLK Ratio"))
ucontrol->value.integer.value[0] = i2s->bclk_ratio;
return 0;
}
static int tegra210_i2s_put_format(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
struct tegra210_i2s *i2s = snd_soc_codec_get_drvdata(codec);
int value = ucontrol->value.integer.value[0];
/* set the format control flag */
if (strstr(kcontrol->id.name, "input"))
i2s->format_in = value;
else if (strstr(kcontrol->id.name, "codec"))
i2s->codec_bit_format = value;
else if (strstr(kcontrol->id.name, "Sample Rate"))
i2s->sample_rate_via_control = value;
else if (strstr(kcontrol->id.name, "Channels"))
i2s->channels_via_control = value;
else if (strstr(kcontrol->id.name, "Capture stereo to mono"))
i2s->stereo_to_mono[I2S_TX_PATH] = value;
else if (strstr(kcontrol->id.name, "Capture mono to stereo"))
i2s->mono_to_stereo[I2S_TX_PATH] = value;
else if (strstr(kcontrol->id.name, "Playback stereo to mono"))
i2s->stereo_to_mono[I2S_RX_PATH] = value;
else if (strstr(kcontrol->id.name, "Playback mono to stereo"))
i2s->mono_to_stereo[I2S_RX_PATH] = value;
else if (strstr(kcontrol->id.name, "Playback FIFO threshold")) {
if (value >= 0 && value < TEGRA210_I2S_RX_FIFO_DEPTH)
i2s->rx_fifo_th = value;
else
return -EINVAL;
} else if (strstr(kcontrol->id.name, "BCLK Ratio"))
i2s->bclk_ratio = value;
return 0;
}
static const char * const tegra210_i2s_format_text[] = {
"None",
"16",
"32",
};
static const int tegra210_i2s_fmt_values[] = {
0,
TEGRA210_AUDIOCIF_BITS_16,
TEGRA210_AUDIOCIF_BITS_32,
};
static const int tegra210_i2s_sample_size[] = {
0,
16,
32,
};
static const struct soc_enum tegra210_i2s_format_enum =
SOC_ENUM_SINGLE(SND_SOC_NOPM, 0,
ARRAY_SIZE(tegra210_i2s_format_text),
tegra210_i2s_format_text);
static int tegra210_i2s_startup(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct device *dev = dai->dev;
struct tegra210_i2s *i2s = dev_get_drvdata(dev);
int ret;
if (!(tegra_platform_is_unit_fpga() || tegra_platform_is_fpga()) &&
!i2s->loopback) {
if (i2s->prod_name != NULL) {
ret = tegra_pinctrl_config_prod(dev, i2s->prod_name);
if (ret < 0) {
dev_warn(dev, "Failed to set %s setting\n",
i2s->prod_name);
}
}
if (i2s->num_supplies > 0) {
ret = regulator_bulk_enable(i2s->num_supplies,
i2s->supplies);
if (ret < 0)
dev_err(dev, "failed to enable i2s io regulator\n");
}
}
return 0;
}
static void tegra210_i2s_shutdown(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct device *dev = dai->dev;
struct tegra210_i2s *i2s = dev_get_drvdata(dev);
int ret;
if (!(tegra_platform_is_unit_fpga() || tegra_platform_is_fpga())) {
if (i2s->num_supplies > 0) {
ret = regulator_bulk_disable(i2s->num_supplies,
i2s->supplies);
if (ret < 0) {
dev_err(dev,
"failed to disable i2s io regulator\n");
}
}
}
}
static int tegra210_i2s_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_i2s *i2s = snd_soc_dai_get_drvdata(dai);
unsigned int mask, val, reg, frame_format, rx_mask, tx_mask;
int ret, sample_size, channels, srate, i2sclock, bitcnt, max_th;
struct tegra210_xbar_cif_conf cif_conf;
memset(&cif_conf, 0, sizeof(struct tegra210_xbar_cif_conf));
channels = params_channels(params);
if (channels < 1) {
dev_err(dev, "Doesn't support %d channels\n", channels);
return -EINVAL;
}
mask = TEGRA210_I2S_CTRL_BIT_SIZE_MASK;
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_S8:
val = TEGRA210_I2S_CTRL_BIT_SIZE_8;
sample_size = 8;
cif_conf.audio_bits = TEGRA210_AUDIOCIF_BITS_8;
cif_conf.client_bits = TEGRA210_AUDIOCIF_BITS_8;
break;
case SNDRV_PCM_FORMAT_S16_LE:
val = TEGRA210_I2S_CTRL_BIT_SIZE_16;
sample_size = 16;
cif_conf.audio_bits = TEGRA210_AUDIOCIF_BITS_16;
cif_conf.client_bits = TEGRA210_AUDIOCIF_BITS_16;
break;
case SNDRV_PCM_FORMAT_S24_LE:
val = TEGRA210_I2S_CTRL_BIT_SIZE_24;
sample_size = 24;
cif_conf.audio_bits = TEGRA210_AUDIOCIF_BITS_24;
cif_conf.client_bits = TEGRA210_AUDIOCIF_BITS_24;
break;
case SNDRV_PCM_FORMAT_S32_LE:
val = TEGRA210_I2S_CTRL_BIT_SIZE_32;
sample_size = 32;
cif_conf.audio_bits = TEGRA210_AUDIOCIF_BITS_32;
cif_conf.client_bits = TEGRA210_AUDIOCIF_BITS_32;
break;
default:
dev_err(dev, "Wrong format!\n");
return -EINVAL;
}
if (i2s->codec_bit_format) {
val = tegra210_i2s_fmt_values[i2s->codec_bit_format];
sample_size = tegra210_i2s_sample_size[i2s->codec_bit_format];
cif_conf.client_bits = tegra210_i2s_fmt_values[i2s->codec_bit_format];
}
regmap_update_bits(i2s->regmap, TEGRA210_I2S_CTRL, mask, val);
srate = params_rate(params);
if (i2s->sample_rate_via_control)
srate = i2s->sample_rate_via_control;
if (i2s->channels_via_control) {
channels = i2s->channels_via_control;
rx_mask = tx_mask = (1 << channels) - 1;
} else {
rx_mask = i2s->rx_mask;
tx_mask = i2s->tx_mask;
}
regmap_read(i2s->regmap, TEGRA210_I2S_CTRL, &val);
frame_format = val & TEGRA210_I2S_CTRL_FRAME_FORMAT_MASK;
if (frame_format == TEGRA210_I2S_CTRL_FRAME_FORMAT_FSYNC_MODE) {
tegra210_i2s_set_slot_ctrl(i2s->regmap, channels, tx_mask,
rx_mask);
cif_conf.audio_channels = channels;
cif_conf.client_channels = channels;
} else {
cif_conf.audio_channels = channels;
cif_conf.client_channels = (channels == 1) ? 2 : channels;
}
i2sclock = srate * sample_size * cif_conf.client_channels;
if (i2s->bclk_ratio != 0)
i2sclock *= i2s->bclk_ratio;
bitcnt = (i2sclock / srate) - 1;
if (frame_format == TEGRA210_I2S_FRAME_FORMAT_LRCK)
bitcnt >>= 1;
if ((bitcnt < 0) ||
(bitcnt > TEGRA210_I2S_TIMING_CHANNEL_BIT_CNT_MASK)) {
dev_err(dev, "Can't set channel bit count\n");
return -EINVAL;
}
ret = tegra210_i2s_set_clock_rate(dev, i2sclock);
if (ret) {
dev_err(dev, "Can't set I2S clock rate: %d\n", ret);
return ret;
}
val = bitcnt << TEGRA210_I2S_TIMING_CHANNEL_BIT_CNT_SHIFT;
if (i2sclock % (2 * srate))
val |= TEGRA210_I2S_TIMING_NON_SYM_EN;
regmap_write(i2s->regmap, TEGRA210_I2S_TIMING, val);
/* As a COCEC DAI, CAPTURE is transmit */
if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
reg = TEGRA210_I2S_AXBAR_RX_CIF_CTRL;
if (i2s->mono_to_stereo[I2S_RX_PATH] > 0) {
cif_conf.audio_channels = 1;
cif_conf.client_channels = 2;
cif_conf.mono_conv =
i2s->mono_to_stereo[I2S_RX_PATH] - 1;
} else if (i2s->stereo_to_mono[I2S_RX_PATH] > 0) {
cif_conf.audio_channels = 2;
cif_conf.client_channels = 1;
cif_conf.stereo_conv =
i2s->stereo_to_mono[I2S_RX_PATH] - 1;
}
/* RX FIFO threshold interms of frames */
max_th = (TEGRA210_I2S_RX_FIFO_DEPTH / channels) - 1;
if (i2s->rx_fifo_th > max_th) { /* error handling */
cif_conf.threshold = max_th;
i2s->rx_fifo_th = max_th;
} else
cif_conf.threshold = i2s->rx_fifo_th;
} else {
if (i2s->mono_to_stereo[I2S_TX_PATH] > 0) {
cif_conf.audio_channels = 2;
cif_conf.client_channels = 1;
cif_conf.mono_conv =
i2s->mono_to_stereo[I2S_TX_PATH] - 1;
} else if (i2s->stereo_to_mono[I2S_TX_PATH] > 0) {
cif_conf.audio_channels = 1;
cif_conf.client_channels = 2;
cif_conf.stereo_conv =
i2s->stereo_to_mono[I2S_TX_PATH] - 1;
}
if (i2s->format_in)
cif_conf.audio_bits =
tegra210_i2s_fmt_values[i2s->format_in];
reg = TEGRA210_I2S_AXBAR_TX_CIF_CTRL;
}
tegra210_xbar_set_cif(i2s->regmap, reg, &cif_conf);
if (i2s->format == SND_SOC_DAIFMT_RIGHT_J)
tegra210_i2s_set_rjm_offset(i2s, sample_size);
if (i2s->enable_cya)
regmap_write(i2s->regmap, TEGRA210_I2S_CYA, 1);
return 0;
}
static struct snd_soc_dai_ops tegra210_i2s_dai_ops = {
.set_fmt = tegra210_i2s_set_fmt,
.hw_params = tegra210_i2s_hw_params,
.set_bclk_ratio = tegra210_i2s_set_dai_bclk_ratio,
.set_tdm_slot = tegra210_i2s_set_tdm_slot,
.startup = tegra210_i2s_startup,
.shutdown = tegra210_i2s_shutdown,
};
static struct snd_soc_dai_driver tegra210_i2s_dais[] = {
{
.name = "CIF",
.playback = {
.stream_name = "CIF Receive",
.channels_min = 1,
.channels_max = 16,
.rates = SNDRV_PCM_RATE_8000_192000,
.formats = SNDRV_PCM_FMTBIT_S8 |
SNDRV_PCM_FMTBIT_S16_LE |
SNDRV_PCM_FMTBIT_S24_LE |
SNDRV_PCM_FMTBIT_S32_LE,
},
.capture = {
.stream_name = "CIF Transmit",
.channels_min = 1,
.channels_max = 16,
.rates = SNDRV_PCM_RATE_8000_192000,
.formats = SNDRV_PCM_FMTBIT_S8 |
SNDRV_PCM_FMTBIT_S16_LE |
SNDRV_PCM_FMTBIT_S24_LE |
SNDRV_PCM_FMTBIT_S32_LE,
},
},
{
.name = "DAP",
.playback = {
.stream_name = "DAP Receive",
.channels_min = 1,
.channels_max = 16,
.rates = SNDRV_PCM_RATE_8000_192000,
.formats = SNDRV_PCM_FMTBIT_S8 |
SNDRV_PCM_FMTBIT_S16_LE |
SNDRV_PCM_FMTBIT_S24_LE |
SNDRV_PCM_FMTBIT_S32_LE,
},
.capture = {
.stream_name = "DAP Transmit",
.channels_min = 1,
.channels_max = 16,
.rates = SNDRV_PCM_RATE_8000_192000,
.formats = SNDRV_PCM_FMTBIT_S8 |
SNDRV_PCM_FMTBIT_S16_LE |
SNDRV_PCM_FMTBIT_S24_LE |
SNDRV_PCM_FMTBIT_S32_LE,
},
.ops = &tegra210_i2s_dai_ops,
.symmetric_rates = 1,
}
};
static int tegra210_i2s_loopback_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
struct tegra210_i2s *i2s = snd_soc_codec_get_drvdata(codec);
ucontrol->value.integer.value[0] = i2s->loopback;
return 0;
}
static int tegra210_i2s_loopback_put(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
struct tegra210_i2s *i2s = snd_soc_codec_get_drvdata(codec);
i2s->loopback = ucontrol->value.integer.value[0];
regmap_update_bits(i2s->regmap, TEGRA210_I2S_CTRL,
TEGRA210_I2S_CTRL_LPBK_MASK,
i2s->loopback << TEGRA210_I2S_CTRL_LPBK_SHIFT);
return 0;
}
static int tegra210_i2s_get_bclk_ratio(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
struct tegra210_i2s *i2s = snd_soc_codec_get_drvdata(codec);
ucontrol->value.integer.value[0] = i2s->bclk_ratio;
return 0;
}
static int tegra210_i2s_put_bclk_ratio(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
struct tegra210_i2s *i2s = snd_soc_codec_get_drvdata(codec);
i2s->bclk_ratio = ucontrol->value.integer.value[0];
return 0;
}
static int tegra210_i2s_fsync_width_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
struct tegra210_i2s *i2s = snd_soc_codec_get_drvdata(codec);
ucontrol->value.integer.value[0] = i2s->fsync_width;
return 0;
}
static int tegra210_i2s_fsync_width_put(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
struct tegra210_i2s *i2s = snd_soc_codec_get_drvdata(codec);
i2s->fsync_width = ucontrol->value.integer.value[0];
regmap_update_bits(i2s->regmap, TEGRA210_I2S_CTRL,
TEGRA210_I2S_CTRL_FSYNC_WIDTH_MASK,
i2s->fsync_width <<
TEGRA210_I2S_CTRL_FSYNC_WIDTH_SHIFT);
return 0;
}
static const char * const tegra210_i2s_stereo_conv_text[] = {
"None", "CH0", "CH1", "AVG",
};
static const char * const tegra210_i2s_mono_conv_text[] = {
"None", "ZERO", "COPY",
};
static const struct soc_enum tegra210_i2s_mono_conv_enum =
SOC_ENUM_SINGLE(SND_SOC_NOPM, 0,
ARRAY_SIZE(tegra210_i2s_mono_conv_text),
tegra210_i2s_mono_conv_text);
static const struct soc_enum tegra210_i2s_stereo_conv_enum =
SOC_ENUM_SINGLE(SND_SOC_NOPM, 0,
ARRAY_SIZE(tegra210_i2s_stereo_conv_text),
tegra210_i2s_stereo_conv_text);
#define NV_SOC_SINGLE_RANGE_EXT(xname, xmin, xmax, xget, xput) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = (xname), \
.info = snd_soc_info_xr_sx, .get = xget, .put = xput, \
.private_value = (unsigned long)&(struct soc_mixer_control) \
{.invert = 0, .min = xmin, .max = xmax, \
.platform_max = xmax}}
static const struct snd_kcontrol_new tegra210_i2s_controls[] = {
SOC_SINGLE_EXT("Loopback", SND_SOC_NOPM, 0, 1, 0,
tegra210_i2s_loopback_get, tegra210_i2s_loopback_put),
SOC_ENUM_EXT("input bit format", tegra210_i2s_format_enum,
tegra210_i2s_get_format, tegra210_i2s_put_format),
SOC_ENUM_EXT("codec bit format", tegra210_i2s_format_enum,
tegra210_i2s_get_format, tegra210_i2s_put_format),
SOC_SINGLE_EXT("fsync width", SND_SOC_NOPM, 0, 255, 0,
tegra210_i2s_fsync_width_get, tegra210_i2s_fsync_width_put),
SOC_SINGLE_EXT("Sample Rate", 0, 0, 192000, 0,
tegra210_i2s_get_format, tegra210_i2s_put_format),
SOC_SINGLE_EXT("Channels", 0, 0, 16, 0,
tegra210_i2s_get_format, tegra210_i2s_put_format),
SOC_SINGLE_EXT("BCLK Ratio", SND_SOC_NOPM, 0, INT_MAX, 0,
tegra210_i2s_get_bclk_ratio,
tegra210_i2s_put_bclk_ratio),
SOC_ENUM_EXT("Capture stereo to mono conv",
tegra210_i2s_stereo_conv_enum, tegra210_i2s_get_format,
tegra210_i2s_put_format),
SOC_ENUM_EXT("Capture mono to stereo conv",
tegra210_i2s_mono_conv_enum, tegra210_i2s_get_format,
tegra210_i2s_put_format),
SOC_ENUM_EXT("Playback stereo to mono conv",
tegra210_i2s_stereo_conv_enum, tegra210_i2s_get_format,
tegra210_i2s_put_format),
SOC_ENUM_EXT("Playback mono to stereo conv",
tegra210_i2s_mono_conv_enum, tegra210_i2s_get_format,
tegra210_i2s_put_format),
NV_SOC_SINGLE_RANGE_EXT("Playback FIFO threshold", 0,
TEGRA210_I2S_RX_FIFO_DEPTH - 1,
tegra210_i2s_get_format,
tegra210_i2s_put_format),
};
static const struct snd_soc_dapm_widget tegra210_i2s_widgets[] = {
SND_SOC_DAPM_AIF_IN("CIF RX", NULL, 0, SND_SOC_NOPM,
0, 0),
SND_SOC_DAPM_AIF_OUT("CIF TX", NULL, 0, SND_SOC_NOPM,
0, 0),
SND_SOC_DAPM_AIF_IN_E("DAP RX", NULL, 0, TEGRA210_I2S_AXBAR_TX_ENABLE,
TEGRA210_I2S_AXBAR_TX_EN_SHIFT, 0,
tegra210_i2s_rx_stop, SND_SOC_DAPM_PRE_PMU),
SND_SOC_DAPM_AIF_OUT_E("DAP TX", NULL, 0, TEGRA210_I2S_AXBAR_RX_ENABLE,
TEGRA210_I2S_AXBAR_RX_EN_SHIFT, 0,
tegra210_i2s_tx_stop, SND_SOC_DAPM_PRE_PMU),
};
static const struct snd_soc_dapm_route tegra210_i2s_routes[] = {
{ "CIF RX", NULL, "CIF Receive" },
{ "DAP TX", NULL, "CIF RX" },
{ "DAP Transmit", NULL, "DAP TX" },
{ "DAP RX", NULL, "DAP Receive" },
{ "CIF TX", NULL, "DAP RX" },
{ "CIF Transmit", NULL, "CIF TX" },
};
static struct snd_soc_codec_driver tegra210_i2s_codec = {
.idle_bias_off = 1,
.component_driver = {
.dapm_widgets = tegra210_i2s_widgets,
.num_dapm_widgets = ARRAY_SIZE(tegra210_i2s_widgets),
.dapm_routes = tegra210_i2s_routes,
.num_dapm_routes = ARRAY_SIZE(tegra210_i2s_routes),
.controls = tegra210_i2s_controls,
.num_controls = ARRAY_SIZE(tegra210_i2s_controls),
},
};
static bool tegra210_i2s_wr_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
case TEGRA210_I2S_AXBAR_RX_ENABLE:
case TEGRA210_I2S_AXBAR_RX_SOFT_RESET:
case TEGRA210_I2S_AXBAR_RX_INT_MASK:
case TEGRA210_I2S_AXBAR_RX_INT_SET:
case TEGRA210_I2S_AXBAR_RX_INT_CLEAR:
case TEGRA210_I2S_AXBAR_RX_CIF_CTRL:
case TEGRA210_I2S_AXBAR_RX_CTRL:
case TEGRA210_I2S_AXBAR_RX_SLOT_CTRL:
case TEGRA210_I2S_AXBAR_RX_CLK_TRIM:
case TEGRA210_I2S_AXBAR_TX_ENABLE:
case TEGRA210_I2S_AXBAR_TX_SOFT_RESET:
case TEGRA210_I2S_AXBAR_TX_INT_MASK:
case TEGRA210_I2S_AXBAR_TX_INT_SET:
case TEGRA210_I2S_AXBAR_TX_INT_CLEAR:
case TEGRA210_I2S_AXBAR_TX_CIF_CTRL:
case TEGRA210_I2S_AXBAR_TX_CTRL:
case TEGRA210_I2S_AXBAR_TX_SLOT_CTRL:
case TEGRA210_I2S_AXBAR_TX_CLK_TRIM:
case TEGRA210_I2S_ENABLE:
case TEGRA210_I2S_SOFT_RESET:
case TEGRA210_I2S_CG:
case TEGRA210_I2S_CTRL:
case TEGRA210_I2S_TIMING:
case TEGRA210_I2S_SLOT_CTRL:
case TEGRA210_I2S_CLK_TRIM:
case TEGRA210_I2S_CYA:
return true;
default:
return false;
};
}
static bool tegra210_i2s_rd_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
case TEGRA210_I2S_AXBAR_RX_STATUS:
case TEGRA210_I2S_AXBAR_RX_CIF_FIFO_STATUS:
case TEGRA210_I2S_AXBAR_RX_ENABLE:
case TEGRA210_I2S_AXBAR_RX_INT_MASK:
case TEGRA210_I2S_AXBAR_RX_INT_SET:
case TEGRA210_I2S_AXBAR_RX_INT_CLEAR:
case TEGRA210_I2S_AXBAR_RX_CIF_CTRL:
case TEGRA210_I2S_AXBAR_RX_CTRL:
case TEGRA210_I2S_AXBAR_RX_SLOT_CTRL:
case TEGRA210_I2S_AXBAR_RX_CLK_TRIM:
case TEGRA210_I2S_AXBAR_RX_INT_STATUS:
case TEGRA210_I2S_AXBAR_RX_SOFT_RESET:
case TEGRA210_I2S_AXBAR_TX_STATUS:
case TEGRA210_I2S_AXBAR_TX_CIF_FIFO_STATUS:
case TEGRA210_I2S_AXBAR_TX_ENABLE:
case TEGRA210_I2S_AXBAR_TX_INT_MASK:
case TEGRA210_I2S_AXBAR_TX_INT_SET:
case TEGRA210_I2S_AXBAR_TX_INT_CLEAR:
case TEGRA210_I2S_AXBAR_TX_CIF_CTRL:
case TEGRA210_I2S_AXBAR_TX_CTRL:
case TEGRA210_I2S_AXBAR_TX_SLOT_CTRL:
case TEGRA210_I2S_AXBAR_TX_CLK_TRIM:
case TEGRA210_I2S_AXBAR_TX_INT_STATUS:
case TEGRA210_I2S_AXBAR_TX_SOFT_RESET:
case TEGRA210_I2S_ENABLE:
case TEGRA210_I2S_STATUS:
case TEGRA210_I2S_SOFT_RESET:
case TEGRA210_I2S_CG:
case TEGRA210_I2S_CTRL:
case TEGRA210_I2S_TIMING:
case TEGRA210_I2S_SLOT_CTRL:
case TEGRA210_I2S_CLK_TRIM:
case TEGRA210_I2S_INT_STATUS:
case TEGRA210_I2S_CYA:
return true;
default:
return false;
};
}
static bool tegra210_i2s_volatile_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
case TEGRA210_I2S_AXBAR_RX_INT_STATUS:
case TEGRA210_I2S_AXBAR_RX_STATUS:
case TEGRA210_I2S_AXBAR_TX_STATUS:
case TEGRA210_I2S_AXBAR_TX_INT_STATUS:
case TEGRA210_I2S_INT_STATUS:
case TEGRA210_I2S_AXBAR_RX_SOFT_RESET:
case TEGRA210_I2S_AXBAR_TX_SOFT_RESET:
return true;
default:
return false;
};
}
static const struct regmap_config tegra210_i2s_regmap_config = {
.reg_bits = 32,
.reg_stride = 4,
.val_bits = 32,
.max_register = TEGRA210_I2S_CYA,
.writeable_reg = tegra210_i2s_wr_reg,
.readable_reg = tegra210_i2s_rd_reg,
.volatile_reg = tegra210_i2s_volatile_reg,
.reg_defaults = tegra210_i2s_reg_defaults,
.num_reg_defaults = ARRAY_SIZE(tegra210_i2s_reg_defaults),
.cache_type = REGCACHE_FLAT,
};
static const struct of_device_id tegra210_i2s_of_match[] = {
{ .compatible = "nvidia,tegra210-i2s" },
{},
};
static int tegra210_i2s_platform_probe(struct platform_device *pdev)
{
const struct of_device_id *match;
struct device_node *np = pdev->dev.of_node;
struct tegra210_i2s *i2s;
struct resource *mem;
struct property *prop;
void __iomem *regs;
int ret = 0, count = 0, num_supplies;
const char *supply;
match = of_match_device(tegra210_i2s_of_match, &pdev->dev);
if (!match) {
dev_err(&pdev->dev, "Error: No device match found\n");
return -ENODEV;
}
i2s = devm_kzalloc(&pdev->dev, sizeof(*i2s), GFP_KERNEL);
if (!i2s)
return -ENOMEM;
i2s->tx_mask = i2s->rx_mask = 0xFFFF;
i2s->enable_cya = false;
i2s->loopback = 0;
i2s->prod_name = NULL;
/* default threshold settings */
i2s->rx_fifo_th = 3;
dev_set_drvdata(&pdev->dev, i2s);
if (!(tegra_platform_is_unit_fpga() || tegra_platform_is_fpga())) {
i2s->clk_i2s = devm_clk_get(&pdev->dev, "i2s");
if (IS_ERR(i2s->clk_i2s)) {
dev_err(&pdev->dev, "Can't retrieve i2s clock\n");
return PTR_ERR(i2s->clk_i2s);
}
i2s->clk_sync_input =
devm_clk_get(&pdev->dev, "clk_sync_input");
if (IS_ERR(i2s->clk_sync_input))
dev_dbg(&pdev->dev, "Can't get i2s sync input clock\n");
}
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
regs = devm_ioremap_resource(&pdev->dev, mem);
if (IS_ERR(regs))
return PTR_ERR(regs);
i2s->regmap = devm_regmap_init_mmio(&pdev->dev, regs,
&tegra210_i2s_regmap_config);
if (IS_ERR(i2s->regmap)) {
dev_err(&pdev->dev, "regmap init failed\n");
return PTR_ERR(i2s->regmap);
}
regcache_cache_only(i2s->regmap, true);
ret = of_property_read_u32(np, "nvidia,ahub-i2s-id",
&pdev->dev.id);
if (ret < 0) {
dev_err(&pdev->dev, "Missing property nvidia,ahub-i2s-id\n");
return ret;
}
if (of_property_read_u32(pdev->dev.of_node, "bclk-ratio",
&i2s->bclk_ratio) < 0) {
dev_dbg(&pdev->dev, "Missing prop bclk-ratio for I2S%d\n",
pdev->dev.id);
i2s->bclk_ratio = 1;
}
if (of_property_read_u32(pdev->dev.of_node,
"fsync-width", &i2s->fsync_width) < 0) {
dev_info(&pdev->dev, "Missing prop fsync-width for I2S%d\n",
pdev->dev.id);
i2s->fsync_width = 31;
}
if (i2s->fsync_width > 255) {
dev_warn(&pdev->dev, "Default fsync-width to 31 for I2S%d\n",
pdev->dev.id);
i2s->fsync_width = 31;
}
i2s->enable_cya = of_property_read_bool(pdev->dev.of_node,
"enable-cya");
if (!(tegra_platform_is_unit_fpga() || tegra_platform_is_fpga())) {
if (of_property_read_string(np, "prod-name",
&i2s->prod_name) == 0)
tegra_pinctrl_config_prod(&pdev->dev, i2s->prod_name);
num_supplies = of_property_count_strings(np,
"regulator-supplies");
if (num_supplies > 0) {
i2s->num_supplies = num_supplies;
i2s->supplies = devm_kzalloc(&pdev->dev, num_supplies *
sizeof(*i2s->supplies),
GFP_KERNEL);
if (!i2s->supplies)
return -ENOMEM;
of_property_for_each_string(np, "regulator-supplies",
prop, supply)
i2s->supplies[count++].supply = supply;
ret = devm_regulator_bulk_get(&pdev->dev,
i2s->num_supplies,
i2s->supplies);
if (ret) {
dev_err(&pdev->dev,
"Failed to get supplies: %d\n", ret);
return ret;
}
}
}
pm_runtime_enable(&pdev->dev);
ret = snd_soc_register_codec(&pdev->dev, &tegra210_i2s_codec,
tegra210_i2s_dais,
ARRAY_SIZE(tegra210_i2s_dais));
if (ret != 0) {
dev_err(&pdev->dev, "Could not register CODEC: %d\n", ret);
pm_runtime_disable(&pdev->dev);
return ret;
}
return 0;
}
static int tegra210_i2s_platform_remove(struct platform_device *pdev)
{
snd_soc_unregister_codec(&pdev->dev);
pm_runtime_disable(&pdev->dev);
if (!pm_runtime_status_suspended(&pdev->dev))
tegra210_i2s_runtime_suspend(&pdev->dev);
return 0;
}
static const struct dev_pm_ops tegra210_i2s_pm_ops = {
SET_RUNTIME_PM_OPS(tegra210_i2s_runtime_suspend,
tegra210_i2s_runtime_resume, NULL)
SET_LATE_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
pm_runtime_force_resume)
};
static struct platform_driver tegra210_i2s_driver = {
.driver = {
.name = DRV_NAME,
.owner = THIS_MODULE,
.of_match_table = tegra210_i2s_of_match,
.pm = &tegra210_i2s_pm_ops,
},
.probe = tegra210_i2s_platform_probe,
.remove = tegra210_i2s_platform_remove,
};
module_platform_driver(tegra210_i2s_driver)
MODULE_AUTHOR("Songhee Baek <sbaek@nvidia.com>");
MODULE_DESCRIPTION("Tegra210 I2S ASoC driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:" DRV_NAME);
MODULE_DEVICE_TABLE(of, tegra210_i2s_of_match);
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