// SPDX-License-Identifier: GPL-2.0-only
//
// tegra210_i2s.c - Tegra210 I2S driver
//
// Copyright (c) 2020 NVIDIA CORPORATION. All rights reserved.
#include <linux/clk.h>
#include <linux/device.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/of_graph.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/regmap.h>
#include <sound/core.h>
#include <sound/pcm_params.h>
#include <sound/simple_card_utils.h>
#include <sound/soc.h>
#include "tegra210_i2s.h"
#include "tegra_cif.h"
static const struct reg_default tegra210_i2s_reg_defaults[] = {
{ TEGRA210_I2S_RX_INT_MASK, 0x00000003 },
{ TEGRA210_I2S_RX_CIF_CTRL, 0x00007700 },
{ TEGRA210_I2S_TX_INT_MASK, 0x00000003 },
{ TEGRA210_I2S_TX_CIF_CTRL, 0x00007700 },
{ TEGRA210_I2S_CG, 0x1 },
{ TEGRA210_I2S_TIMING, 0x0000001f },
{ TEGRA210_I2S_ENABLE, 0x1 },
/*
* Below update does not have any effect on Tegra186 and Tegra194.
* On Tegra210, I2S4 has "i2s4a" and "i2s4b" pins and below update
* is required to select i2s4b for it to be functional for I2S
* operation.
*/
{ TEGRA210_I2S_CYA, 0x1 },
};
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_TX_SLOT_CTRL, tx_slot_mask);
regmap_write(regmap, TEGRA210_I2S_RX_SLOT_CTRL, rx_slot_mask);
}
static int tegra210_i2s_set_clock_rate(struct device *dev,
unsigned int clock_rate)
{
struct tegra210_i2s *i2s = dev_get_drvdata(dev);
unsigned int val;
int err;
regmap_read(i2s->regmap, TEGRA210_I2S_CTRL, &val);
/* No need to set rates if I2S is being operated in slave */
if (!(val & I2S_CTRL_MASTER_EN))
return 0;
err = clk_set_rate(i2s->clk_i2s, clock_rate);
if (err) {
dev_err(dev, "can't set I2S bit clock rate %u, err: %d\n",
clock_rate, err);
return err;
}
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.
*/
err = clk_set_rate(i2s->clk_sync_input, clock_rate);
if (err) {
dev_err(dev,
"can't set I2S sync input rate %u, err = %d\n",
clock_rate, err);
return err;
}
}
return 0;
}
static int tegra210_i2s_sw_reset(struct snd_soc_component *compnt,
int stream)
{
struct device *dev = compnt->dev;
struct tegra210_i2s *i2s = dev_get_drvdata(dev);
unsigned int reset_mask = I2S_SOFT_RESET_MASK;
unsigned int reset_en = I2S_SOFT_RESET_EN;
unsigned int reset_reg, cif_reg, stream_reg;
unsigned int cif_ctrl, stream_ctrl, i2s_ctrl, val;
int err;
if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
reset_reg = TEGRA210_I2S_RX_SOFT_RESET;
cif_reg = TEGRA210_I2S_RX_CIF_CTRL;
stream_reg = TEGRA210_I2S_RX_CTRL;
} else {
reset_reg = TEGRA210_I2S_TX_SOFT_RESET;
cif_reg = TEGRA210_I2S_TX_CIF_CTRL;
stream_reg = TEGRA210_I2S_TX_CTRL;
}
/* Store CIF and I2S control values */
regmap_read(i2s->regmap, cif_reg, &cif_ctrl);
regmap_read(i2s->regmap, stream_reg, &stream_ctrl);
regmap_read(i2s->regmap, TEGRA210_I2S_CTRL, &i2s_ctrl);
/* Reset to make sure the previous transactions are clean */
regmap_update_bits(i2s->regmap, reset_reg, reset_mask, reset_en);
err = regmap_read_poll_timeout(i2s->regmap, reset_reg, val,
!(val & reset_mask & reset_en),
10, 10000);
if (err) {
dev_err(dev, "timeout: failed to reset I2S for %s\n",
snd_pcm_direction_name(stream));
return err;
}
/* Restore CIF and I2S control values */
regmap_write(i2s->regmap, cif_reg, cif_ctrl);
regmap_write(i2s->regmap, stream_reg, stream_ctrl);
regmap_write(i2s->regmap, TEGRA210_I2S_CTRL, i2s_ctrl);
return 0;
}
static int tegra210_i2s_init(struct snd_soc_dapm_widget *w,
struct snd_kcontrol *kcontrol, int event)
{
struct snd_soc_component *compnt = snd_soc_dapm_to_component(w->dapm);
struct device *dev = compnt->dev;
struct tegra210_i2s *i2s = dev_get_drvdata(dev);
unsigned int val, status_reg;
int stream;
int err;
switch (w->reg) {
case TEGRA210_I2S_RX_ENABLE:
stream = SNDRV_PCM_STREAM_PLAYBACK;
status_reg = TEGRA210_I2S_RX_STATUS;
break;
case TEGRA210_I2S_TX_ENABLE:
stream = SNDRV_PCM_STREAM_CAPTURE;
status_reg = TEGRA210_I2S_TX_STATUS;
break;
default:
return -EINVAL;
}
/* Ensure I2S is in disabled state before new session */
err = regmap_read_poll_timeout(i2s->regmap, status_reg, val,
!(val & I2S_EN_MASK & I2S_EN),
10, 10000);
if (err) {
dev_err(dev, "timeout: previous I2S %s is still active\n",
snd_pcm_direction_name(stream));
return err;
}
return tegra210_i2s_sw_reset(compnt, stream);
}
static int __maybe_unused tegra210_i2s_runtime_suspend(struct device *dev)
{
struct tegra210_i2s *i2s = dev_get_drvdata(dev);
regcache_cache_only(i2s->regmap, true);
regcache_mark_dirty(i2s->regmap);
clk_disable_unprepare(i2s->clk_i2s);
return 0;
}
static int __maybe_unused tegra210_i2s_runtime_resume(struct device *dev)
{
struct tegra210_i2s *i2s = dev_get_drvdata(dev);
int err;
err = clk_prepare_enable(i2s->clk_i2s);
if (err) {
dev_err(dev, "failed to enable I2S bit clock, err: %d\n", err);
return err;
}
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)
{
/* Capture path */
regmap_update_bits(i2s->regmap, TEGRA210_I2S_TX_CTRL,
I2S_CTRL_DATA_OFFSET_MASK,
data_offset << I2S_DATA_SHIFT);
/* Playback path */
regmap_update_bits(i2s->regmap, TEGRA210_I2S_RX_CTRL,
I2S_CTRL_DATA_OFFSET_MASK,
data_offset << I2S_DATA_SHIFT);
}
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 = I2S_CTRL_MASTER_EN_MASK;
switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
case SND_SOC_DAIFMT_BC_FC:
val = 0;
break;
case SND_SOC_DAIFMT_BP_FP:
val = I2S_CTRL_MASTER_EN;
break;
default:
return -EINVAL;
}
mask |= I2S_CTRL_FRAME_FMT_MASK | I2S_CTRL_LRCK_POL_MASK;
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_DSP_A:
val |= I2S_CTRL_FRAME_FMT_FSYNC_MODE;
val |= I2S_CTRL_LRCK_POL_HIGH;
tegra210_i2s_set_data_offset(i2s, 1);
break;
case SND_SOC_DAIFMT_DSP_B:
val |= I2S_CTRL_FRAME_FMT_FSYNC_MODE;
val |= I2S_CTRL_LRCK_POL_HIGH;
tegra210_i2s_set_data_offset(i2s, 0);
break;
/* I2S mode has data offset of 1 */
case SND_SOC_DAIFMT_I2S:
val |= I2S_CTRL_FRAME_FMT_LRCK_MODE;
val |= I2S_CTRL_LRCK_POL_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 |= I2S_CTRL_FRAME_FMT_LRCK_MODE;
val |= I2S_CTRL_LRCK_POL_HIGH;
break;
case SND_SOC_DAIFMT_LEFT_J:
val |= I2S_CTRL_FRAME_FMT_LRCK_MODE;
val |= I2S_CTRL_LRCK_POL_HIGH;
tegra210_i2s_set_data_offset(i2s, 0);
break;
default:
return -EINVAL;
}
mask |= I2S_CTRL_EDGE_CTRL_MASK;
switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
case SND_SOC_DAIFMT_NB_NF:
val |= I2S_CTRL_EDGE_CTRL_POS_EDGE;
break;
case SND_SOC_DAIFMT_NB_IF:
val |= I2S_CTRL_EDGE_CTRL_POS_EDGE;
val ^= I2S_CTRL_LRCK_POL_MASK;
break;
case SND_SOC_DAIFMT_IB_NF:
val |= I2S_CTRL_EDGE_CTRL_NEG_EDGE;
break;
case SND_SOC_DAIFMT_IB_IF:
val |= I2S_CTRL_EDGE_CTRL_NEG_EDGE;
val ^= I2S_CTRL_LRCK_POL_MASK;
break;
default:
return -EINVAL;
}
regmap_update_bits(i2s->regmap, TEGRA210_I2S_CTRL, mask, val);
i2s->dai_fmt = 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 > DEFAULT_I2S_SLOT_MASK) ?
DEFAULT_I2S_SLOT_MASK : tx_mask;
i2s->rx_mask = (rx_mask > DEFAULT_I2S_SLOT_MASK) ?
DEFAULT_I2S_SLOT_MASK : rx_mask;
return 0;
}
static int tegra210_i2s_get_loopback(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_component *compnt = snd_soc_kcontrol_component(kcontrol);
struct tegra210_i2s *i2s = snd_soc_component_get_drvdata(compnt);
ucontrol->value.integer.value[0] = i2s->loopback;
return 0;
}
static int tegra210_i2s_put_loopback(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_component *compnt = snd_soc_kcontrol_component(kcontrol);
struct tegra210_i2s *i2s = snd_soc_component_get_drvdata(compnt);
int value = ucontrol->value.integer.value[0];
if (value == i2s->loopback)
return 0;
i2s->loopback = value;
regmap_update_bits(i2s->regmap, TEGRA210_I2S_CTRL, I2S_CTRL_LPBK_MASK,
i2s->loopback << I2S_CTRL_LPBK_SHIFT);
return 1;
}
static int tegra210_i2s_get_fsync_width(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_component *compnt = snd_soc_kcontrol_component(kcontrol);
struct tegra210_i2s *i2s = snd_soc_component_get_drvdata(compnt);
ucontrol->value.integer.value[0] = i2s->fsync_width;
return 0;
}
static int tegra210_i2s_put_fsync_width(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_component *compnt = snd_soc_kcontrol_component(kcontrol);
struct tegra210_i2s *i2s = snd_soc_component_get_drvdata(compnt);
int value = ucontrol->value.integer.value[0];
if (value == i2s->fsync_width)
return 0;
i2s->fsync_width = value;
/*
* Frame sync width is used only for FSYNC modes and not
* applicable for LRCK modes. Reset value for this field is "0",
* which means the width is one bit clock wide.
* The width requirement may depend on the codec and in such
* cases mixer control is used to update custom values. A value
* of "N" here means, width is "N + 1" bit clock wide.
*/
regmap_update_bits(i2s->regmap, TEGRA210_I2S_CTRL,
I2S_CTRL_FSYNC_WIDTH_MASK,
i2s->fsync_width << I2S_FSYNC_WIDTH_SHIFT);
return 1;
}
static int tegra210_i2s_cget_stereo_to_mono(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_component *compnt = snd_soc_kcontrol_component(kcontrol);
struct tegra210_i2s *i2s = snd_soc_component_get_drvdata(compnt);
ucontrol->value.enumerated.item[0] = i2s->stereo_to_mono[I2S_TX_PATH];
return 0;
}
static int tegra210_i2s_cput_stereo_to_mono(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_component *compnt = snd_soc_kcontrol_component(kcontrol);
struct tegra210_i2s *i2s = snd_soc_component_get_drvdata(compnt);
unsigned int value = ucontrol->value.enumerated.item[0];
if (value == i2s->stereo_to_mono[I2S_TX_PATH])
return 0;
i2s->stereo_to_mono[I2S_TX_PATH] = value;
return 1;
}
static int tegra210_i2s_cget_mono_to_stereo(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_component *compnt = snd_soc_kcontrol_component(kcontrol);
struct tegra210_i2s *i2s = snd_soc_component_get_drvdata(compnt);
ucontrol->value.enumerated.item[0] = i2s->mono_to_stereo[I2S_TX_PATH];
return 0;
}
static int tegra210_i2s_cput_mono_to_stereo(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_component *compnt = snd_soc_kcontrol_component(kcontrol);
struct tegra210_i2s *i2s = snd_soc_component_get_drvdata(compnt);
unsigned int value = ucontrol->value.enumerated.item[0];
if (value == i2s->mono_to_stereo[I2S_TX_PATH])
return 0;
i2s->mono_to_stereo[I2S_TX_PATH] = value;
return 1;
}
static int tegra210_i2s_pget_stereo_to_mono(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_component *compnt = snd_soc_kcontrol_component(kcontrol);
struct tegra210_i2s *i2s = snd_soc_component_get_drvdata(compnt);
ucontrol->value.enumerated.item[0] = i2s->stereo_to_mono[I2S_RX_PATH];
return 0;
}
static int tegra210_i2s_pput_stereo_to_mono(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_component *compnt = snd_soc_kcontrol_component(kcontrol);
struct tegra210_i2s *i2s = snd_soc_component_get_drvdata(compnt);
unsigned int value = ucontrol->value.enumerated.item[0];
if (value == i2s->stereo_to_mono[I2S_RX_PATH])
return 0;
i2s->stereo_to_mono[I2S_RX_PATH] = value;
return 1;
}
static int tegra210_i2s_pget_mono_to_stereo(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_component *compnt = snd_soc_kcontrol_component(kcontrol);
struct tegra210_i2s *i2s = snd_soc_component_get_drvdata(compnt);
ucontrol->value.enumerated.item[0] = i2s->mono_to_stereo[I2S_RX_PATH];
return 0;
}
static int tegra210_i2s_pput_mono_to_stereo(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_component *compnt = snd_soc_kcontrol_component(kcontrol);
struct tegra210_i2s *i2s = snd_soc_component_get_drvdata(compnt);
unsigned int value = ucontrol->value.enumerated.item[0];
if (value == i2s->mono_to_stereo[I2S_RX_PATH])
return 0;
i2s->mono_to_stereo[I2S_RX_PATH] = value;
return 1;
}
static int tegra210_i2s_pget_fifo_th(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_component *compnt = snd_soc_kcontrol_component(kcontrol);
struct tegra210_i2s *i2s = snd_soc_component_get_drvdata(compnt);
ucontrol->value.integer.value[0] = i2s->rx_fifo_th;
return 0;
}
static int tegra210_i2s_pput_fifo_th(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_component *compnt = snd_soc_kcontrol_component(kcontrol);
struct tegra210_i2s *i2s = snd_soc_component_get_drvdata(compnt);
int value = ucontrol->value.integer.value[0];
if (value == i2s->rx_fifo_th)
return 0;
i2s->rx_fifo_th = value;
return 1;
}
static int tegra210_i2s_get_bclk_ratio(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_component *compnt = snd_soc_kcontrol_component(kcontrol);
struct tegra210_i2s *i2s = snd_soc_component_get_drvdata(compnt);
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_component *compnt = snd_soc_kcontrol_component(kcontrol);
struct tegra210_i2s *i2s = snd_soc_component_get_drvdata(compnt);
int value = ucontrol->value.integer.value[0];
if (value == i2s->bclk_ratio)
return 0;
i2s->bclk_ratio = value;
return 1;
}
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_set_timing_params(struct device *dev,
unsigned int sample_size,
unsigned int srate,
unsigned int channels)
{
struct tegra210_i2s *i2s = dev_get_drvdata(dev);
unsigned int val, bit_count, bclk_rate, num_bclk = sample_size;
int err;
if (i2s->bclk_ratio)
num_bclk *= i2s->bclk_ratio;
if (i2s->dai_fmt == SND_SOC_DAIFMT_RIGHT_J)
tegra210_i2s_set_data_offset(i2s, num_bclk - sample_size);
/* I2S bit clock rate */
bclk_rate = srate * channels * num_bclk;
err = tegra210_i2s_set_clock_rate(dev, bclk_rate);
if (err) {
dev_err(dev, "can't set I2S bit clock rate %u, err: %d\n",
bclk_rate, err);
return err;
}
regmap_read(i2s->regmap, TEGRA210_I2S_CTRL, &val);
/*
* For LRCK mode, channel bit count depends on number of bit clocks
* on the left channel, where as for FSYNC mode bit count depends on
* the number of bit clocks in both left and right channels for DSP
* mode or the number of bit clocks in one TDM frame.
*
*/
switch (val & I2S_CTRL_FRAME_FMT_MASK) {
case I2S_CTRL_FRAME_FMT_LRCK_MODE:
bit_count = (bclk_rate / (srate * 2)) - 1;
break;
case I2S_CTRL_FRAME_FMT_FSYNC_MODE:
bit_count = (bclk_rate / srate) - 1;
tegra210_i2s_set_slot_ctrl(i2s->regmap, channels,
i2s->tx_mask, i2s->rx_mask);
break;
default:
dev_err(dev, "invalid I2S frame format\n");
return -EINVAL;
}
if (bit_count > I2S_TIMING_CH_BIT_CNT_MASK) {
dev_err(dev, "invalid I2S channel bit count %u\n", bit_count);
return -EINVAL;
}
regmap_write(i2s->regmap, TEGRA210_I2S_TIMING,
bit_count << I2S_TIMING_CH_BIT_CNT_SHIFT);
return 0;
}
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 sample_size, channels, srate, val, reg, path;
struct tegra_cif_conf cif_conf;
snd_pcm_format_t sample_format;
memset(&cif_conf, 0, sizeof(struct tegra_cif_conf));
channels = params_channels(params);
if (channels < 1) {
dev_err(dev, "invalid I2S %d channel configuration\n",
channels);
return -EINVAL;
}
cif_conf.audio_ch = channels;
cif_conf.client_ch = channels;
if (i2s->client_channels)
cif_conf.client_ch = i2s->client_channels;
/* AHUB CIF Audio bits configs */
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_S8:
cif_conf.audio_bits = TEGRA_ACIF_BITS_8;
break;
case SNDRV_PCM_FORMAT_S16_LE:
cif_conf.audio_bits = TEGRA_ACIF_BITS_16;
break;
case SNDRV_PCM_FORMAT_S32_LE:
cif_conf.audio_bits = TEGRA_ACIF_BITS_32;
break;
default:
dev_err(dev, "unsupported params audio bit format!\n");
return -EOPNOTSUPP;
}
sample_format = params_format(params);
if (i2s->client_sample_format >= 0)
sample_format = (snd_pcm_format_t)i2s->client_sample_format;
/*
* Format of the I2S for sending/receiving the audio
* to/from external device.
*/
switch (sample_format) {
case SNDRV_PCM_FORMAT_S8:
val = I2S_BITS_8;
sample_size = 8;
cif_conf.client_bits = TEGRA_ACIF_BITS_8;
break;
case SNDRV_PCM_FORMAT_S16_LE:
val = I2S_BITS_16;
sample_size = 16;
cif_conf.client_bits = TEGRA_ACIF_BITS_16;
break;
case SNDRV_PCM_FORMAT_S32_LE:
val = I2S_BITS_32;
sample_size = 32;
cif_conf.client_bits = TEGRA_ACIF_BITS_32;
break;
default:
dev_err(dev, "unsupported client bit format!\n");
return -EOPNOTSUPP;
}
/* Program sample size */
regmap_update_bits(i2s->regmap, TEGRA210_I2S_CTRL,
I2S_CTRL_BIT_SIZE_MASK, val);
srate = params_rate(params);
/* For playback I2S RX-CIF and for capture TX-CIF is used */
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
path = I2S_RX_PATH;
else
path = I2S_TX_PATH;
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
unsigned int max_th;
/* FIFO threshold in terms of frames */
max_th = (I2S_RX_FIFO_DEPTH / cif_conf.audio_ch) - 1;
if (i2s->rx_fifo_th > max_th)
i2s->rx_fifo_th = max_th;
cif_conf.threshold = i2s->rx_fifo_th;
reg = TEGRA210_I2S_RX_CIF_CTRL;
} else {
reg = TEGRA210_I2S_TX_CIF_CTRL;
}
cif_conf.mono_conv = i2s->mono_to_stereo[path];
cif_conf.stereo_conv = i2s->stereo_to_mono[path];
tegra_set_cif(i2s->regmap, reg, &cif_conf);
return tegra210_i2s_set_timing_params(dev, sample_size, srate,
cif_conf.client_ch);
}
static const 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,
};
static struct snd_soc_dai_driver tegra210_i2s_dais[] = {
{
.name = "I2S-CIF",
.playback = {
.stream_name = "CIF-Playback",
.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_S32_LE,
},
.capture = {
.stream_name = "CIF-Capture",
.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_S32_LE,
},
},
{
.name = "I2S-DAP",
.playback = {
.stream_name = "DAP-Playback",
.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_S32_LE,
},
.capture = {
.stream_name = "DAP-Capture",
.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_S32_LE,
},
.ops = &tegra210_i2s_dai_ops,
.symmetric_rate = 1,
},
};
static const char * const tegra210_i2s_stereo_conv_text[] = {
"CH0", "CH1", "AVG",
};
static const char * const tegra210_i2s_mono_conv_text[] = {
"Zero", "Copy",
};
static const struct soc_enum tegra210_i2s_mono_conv_enum =
SOC_ENUM_SINGLE(0, 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(0, 0, ARRAY_SIZE(tegra210_i2s_stereo_conv_text),
tegra210_i2s_stereo_conv_text);
static const struct snd_kcontrol_new tegra210_i2s_controls[] = {
SOC_SINGLE_EXT("Loopback", 0, 0, 1, 0, tegra210_i2s_get_loopback,
tegra210_i2s_put_loopback),
SOC_SINGLE_EXT("FSYNC Width", 0, 0, 255, 0,
tegra210_i2s_get_fsync_width,
tegra210_i2s_put_fsync_width),
SOC_ENUM_EXT("Capture Stereo To Mono", tegra210_i2s_stereo_conv_enum,
tegra210_i2s_cget_stereo_to_mono,
tegra210_i2s_cput_stereo_to_mono),
SOC_ENUM_EXT("Capture Mono To Stereo", tegra210_i2s_mono_conv_enum,
tegra210_i2s_cget_mono_to_stereo,
tegra210_i2s_cput_mono_to_stereo),
SOC_ENUM_EXT("Playback Stereo To Mono", tegra210_i2s_stereo_conv_enum,
tegra210_i2s_pget_mono_to_stereo,
tegra210_i2s_pput_mono_to_stereo),
SOC_ENUM_EXT("Playback Mono To Stereo", tegra210_i2s_mono_conv_enum,
tegra210_i2s_pget_stereo_to_mono,
tegra210_i2s_pput_stereo_to_mono),
SOC_SINGLE_EXT("Playback FIFO Threshold", 0, 0, I2S_RX_FIFO_DEPTH - 1,
0, tegra210_i2s_pget_fifo_th, tegra210_i2s_pput_fifo_th),
SOC_SINGLE_EXT("BCLK Ratio", 0, 0, INT_MAX, 0,
tegra210_i2s_get_bclk_ratio,
tegra210_i2s_put_bclk_ratio),
};
static const struct snd_soc_dapm_widget tegra210_i2s_widgets[] = {
SND_SOC_DAPM_AIF_IN_E("RX", NULL, 0, TEGRA210_I2S_RX_ENABLE,
0, 0, tegra210_i2s_init, SND_SOC_DAPM_PRE_PMU),
SND_SOC_DAPM_AIF_OUT_E("TX", NULL, 0, TEGRA210_I2S_TX_ENABLE,
0, 0, tegra210_i2s_init, SND_SOC_DAPM_PRE_PMU),
SND_SOC_DAPM_MIC("MIC", NULL),
SND_SOC_DAPM_SPK("SPK", NULL),
};
static const struct snd_soc_dapm_route tegra210_i2s_routes[] = {
/* Playback route from XBAR */
{ "XBAR-Playback", NULL, "XBAR-TX" },
{ "CIF-Playback", NULL, "XBAR-Playback" },
{ "RX", NULL, "CIF-Playback" },
{ "DAP-Playback", NULL, "RX" },
{ "SPK", NULL, "DAP-Playback" },
/* Capture route to XBAR */
{ "XBAR-RX", NULL, "XBAR-Capture" },
{ "XBAR-Capture", NULL, "CIF-Capture" },
{ "CIF-Capture", NULL, "TX" },
{ "TX", NULL, "DAP-Capture" },
{ "DAP-Capture", NULL, "MIC" },
};
static const struct snd_soc_component_driver tegra210_i2s_cmpnt = {
.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_RX_ENABLE ... TEGRA210_I2S_RX_SOFT_RESET:
case TEGRA210_I2S_RX_INT_MASK ... TEGRA210_I2S_RX_CLK_TRIM:
case TEGRA210_I2S_TX_ENABLE ... TEGRA210_I2S_TX_SOFT_RESET:
case TEGRA210_I2S_TX_INT_MASK ... TEGRA210_I2S_TX_CLK_TRIM:
case TEGRA210_I2S_ENABLE ... TEGRA210_I2S_CG:
case TEGRA210_I2S_CTRL ... TEGRA210_I2S_CYA:
return true;
default:
return false;
}
}
static bool tegra210_i2s_rd_reg(struct device *dev, unsigned int reg)
{
if (tegra210_i2s_wr_reg(dev, reg))
return true;
switch (reg) {
case TEGRA210_I2S_RX_STATUS:
case TEGRA210_I2S_RX_INT_STATUS:
case TEGRA210_I2S_RX_CIF_FIFO_STATUS:
case TEGRA210_I2S_TX_STATUS:
case TEGRA210_I2S_TX_INT_STATUS:
case TEGRA210_I2S_TX_CIF_FIFO_STATUS:
case TEGRA210_I2S_STATUS:
case TEGRA210_I2S_INT_STATUS:
return true;
default:
return false;
}
}
static bool tegra210_i2s_volatile_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
case TEGRA210_I2S_RX_STATUS:
case TEGRA210_I2S_RX_INT_STATUS:
case TEGRA210_I2S_RX_CIF_FIFO_STATUS:
case TEGRA210_I2S_TX_STATUS:
case TEGRA210_I2S_TX_INT_STATUS:
case TEGRA210_I2S_TX_CIF_FIFO_STATUS:
case TEGRA210_I2S_STATUS:
case TEGRA210_I2S_INT_STATUS:
case TEGRA210_I2S_RX_SOFT_RESET:
case TEGRA210_I2S_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,
};
/*
* The AHUB HW modules are interconnected with CIF which are capable of
* supporting Channel and Sample bit format conversion. This needs different
* CIF Audio and client configuration. As one of the config comes from
* params_channels() or params_format(), the extra configuration is passed from
* CIF Port of DT I2S node which can help to perform this conversion.
*
* 4ch audio = 4ch client = 2ch 2ch
* -----> ADMAIF -----------> CIF -------------> I2S ---->
*/
static void tegra210_parse_client_convert(struct device *dev)
{
struct tegra210_i2s *i2s = dev_get_drvdata(dev);
struct device_node *ports, *ep;
struct simple_util_data data = {};
int cif_port = 0;
ports = of_get_child_by_name(dev->of_node, "ports");
if (ports) {
ep = of_graph_get_endpoint_by_regs(ports, cif_port, -1);
if (ep) {
simple_util_parse_convert(ep, NULL, &data);
of_node_put(ep);
}
of_node_put(ports);
}
if (data.convert_channels)
i2s->client_channels = data.convert_channels;
if (data.convert_sample_format)
i2s->client_sample_format = simple_util_get_sample_fmt(&data);
}
static int tegra210_i2s_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct tegra210_i2s *i2s;
void __iomem *regs;
int err;
i2s = devm_kzalloc(dev, sizeof(*i2s), GFP_KERNEL);
if (!i2s)
return -ENOMEM;
i2s->rx_fifo_th = DEFAULT_I2S_RX_FIFO_THRESHOLD;
i2s->tx_mask = DEFAULT_I2S_SLOT_MASK;
i2s->rx_mask = DEFAULT_I2S_SLOT_MASK;
i2s->loopback = false;
i2s->client_sample_format = -EINVAL;
dev_set_drvdata(dev, i2s);
i2s->clk_i2s = devm_clk_get(dev, "i2s");
if (IS_ERR(i2s->clk_i2s)) {
dev_err(dev, "can't retrieve I2S bit clock\n");
return PTR_ERR(i2s->clk_i2s);
}
/*
* Not an error, as this clock is needed only when some other I/O
* requires input clock from current I2S instance, which is
* configurable from DT.
*/
i2s->clk_sync_input = devm_clk_get(dev, "sync_input");
if (IS_ERR(i2s->clk_sync_input))
dev_dbg(dev, "can't retrieve I2S sync input clock\n");
regs = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(regs))
return PTR_ERR(regs);
i2s->regmap = devm_regmap_init_mmio(dev, regs,
&tegra210_i2s_regmap_config);
if (IS_ERR(i2s->regmap)) {
dev_err(dev, "regmap init failed\n");
return PTR_ERR(i2s->regmap);
}
tegra210_parse_client_convert(dev);
regcache_cache_only(i2s->regmap, true);
err = devm_snd_soc_register_component(dev, &tegra210_i2s_cmpnt,
tegra210_i2s_dais,
ARRAY_SIZE(tegra210_i2s_dais));
if (err) {
dev_err(dev, "can't register I2S component, err: %d\n", err);
return err;
}
pm_runtime_enable(dev);
return 0;
}
static void tegra210_i2s_remove(struct platform_device *pdev)
{
pm_runtime_disable(&pdev->dev);
}
static const struct dev_pm_ops tegra210_i2s_pm_ops = {
SET_RUNTIME_PM_OPS(tegra210_i2s_runtime_suspend,
tegra210_i2s_runtime_resume, NULL)
SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
pm_runtime_force_resume)
};
static const struct of_device_id tegra210_i2s_of_match[] = {
{ .compatible = "nvidia,tegra210-i2s" },
{},
};
MODULE_DEVICE_TABLE(of, tegra210_i2s_of_match);
static struct platform_driver tegra210_i2s_driver = {
.driver = {
.name = "tegra210-i2s",
.of_match_table = tegra210_i2s_of_match,
.pm = &tegra210_i2s_pm_ops,
},
.probe = tegra210_i2s_probe,
.remove = tegra210_i2s_remove,
};
module_platform_driver(tegra210_i2s_driver)
MODULE_AUTHOR("Songhee Baek <[email protected]>");
MODULE_DESCRIPTION("Tegra210 ASoC I2S driver");
MODULE_LICENSE("GPL v2");
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