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ASoC: meson: aiu: add i2s and spdif support 

Add support for the i2s and spdif audio outputs (AIU) found in the
amlogic Gx SoC family

Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Link: https://lore.kernel.org/r/20200213155159.3235792-5-jbrunet@baylibre.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Jerome Brunet 2020-02-13 16:51:54 +01:00 коммит произвёл Mark Brown
Родитель 06b7282438
Коммит 6ae9ca9ce9
Не найден ключ, соответствующий данной подписи
Идентификатор ключа GPG: 24D68B725D5487D0
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7
sound/soc/meson/Kconfig
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@ -2,6 +2,13 @@
menu "ASoC support for Amlogic platforms"
depends on ARCH_MESON || COMPILE_TEST
config SND_MESON_AIU
tristate "Amlogic AIU"
select SND_PCM_IEC958
help
Select Y or M to add support for the Audio output subsystem found
in the Amlogic GX SoC family
config SND_MESON_AXG_FIFO
tristate
select REGMAP_MMIO

7
sound/soc/meson/Makefile
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@ -1,5 +1,11 @@
# SPDX-License-Identifier: (GPL-2.0 OR MIT)
snd-soc-meson-aiu-objs := aiu.o
snd-soc-meson-aiu-objs += aiu-encoder-i2s.o
snd-soc-meson-aiu-objs += aiu-encoder-spdif.o
snd-soc-meson-aiu-objs += aiu-fifo.o
snd-soc-meson-aiu-objs += aiu-fifo-i2s.o
snd-soc-meson-aiu-objs += aiu-fifo-spdif.o
snd-soc-meson-axg-fifo-objs := axg-fifo.o
snd-soc-meson-axg-frddr-objs := axg-frddr.o
snd-soc-meson-axg-toddr-objs := axg-toddr.o
@ -14,6 +20,7 @@ snd-soc-meson-axg-pdm-objs := axg-pdm.o
snd-soc-meson-codec-glue-objs := meson-codec-glue.o
snd-soc-meson-g12a-tohdmitx-objs := g12a-tohdmitx.o
obj-$(CONFIG_SND_MESON_AIU) += snd-soc-meson-aiu.o
obj-$(CONFIG_SND_MESON_AXG_FIFO) += snd-soc-meson-axg-fifo.o
obj-$(CONFIG_SND_MESON_AXG_FRDDR) += snd-soc-meson-axg-frddr.o
obj-$(CONFIG_SND_MESON_AXG_TODDR) += snd-soc-meson-axg-toddr.o

324
sound/soc/meson/aiu-encoder-i2s.c Normal file
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@ -0,0 +1,324 @@
// SPDX-License-Identifier: GPL-2.0
//
// Copyright (c) 2020 BayLibre, SAS.
// Author: Jerome Brunet <jbrunet@baylibre.com>
#include <linux/bitfield.h>
#include <linux/clk.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/soc-dai.h>
#include "aiu.h"
#define AIU_I2S_SOURCE_DESC_MODE_8CH BIT(0)
#define AIU_I2S_SOURCE_DESC_MODE_24BIT BIT(5)
#define AIU_I2S_SOURCE_DESC_MODE_32BIT BIT(9)
#define AIU_I2S_SOURCE_DESC_MODE_SPLIT BIT(11)
#define AIU_RST_SOFT_I2S_FAST BIT(0)
#define AIU_I2S_DAC_CFG_MSB_FIRST BIT(2)
#define AIU_I2S_MISC_HOLD_EN BIT(2)
#define AIU_CLK_CTRL_I2S_DIV_EN BIT(0)
#define AIU_CLK_CTRL_I2S_DIV GENMASK(3, 2)
#define AIU_CLK_CTRL_AOCLK_INVERT BIT(6)
#define AIU_CLK_CTRL_LRCLK_INVERT BIT(7)
#define AIU_CLK_CTRL_LRCLK_SKEW GENMASK(9, 8)
#define AIU_CLK_CTRL_MORE_HDMI_AMCLK BIT(6)
#define AIU_CLK_CTRL_MORE_I2S_DIV GENMASK(5, 0)
#define AIU_CODEC_DAC_LRCLK_CTRL_DIV GENMASK(11, 0)
struct aiu_encoder_i2s {
struct clk *aoclk;
struct clk *mclk;
struct clk *mixer;
struct clk *pclk;
};
static void aiu_encoder_i2s_divider_enable(struct snd_soc_component *component,
bool enable)
{
snd_soc_component_update_bits(component, AIU_CLK_CTRL,
AIU_CLK_CTRL_I2S_DIV_EN,
enable ? AIU_CLK_CTRL_I2S_DIV_EN : 0);
}
static void aiu_encoder_i2s_hold(struct snd_soc_component *component,
bool enable)
{
snd_soc_component_update_bits(component, AIU_I2S_MISC,
AIU_I2S_MISC_HOLD_EN,
enable ? AIU_I2S_MISC_HOLD_EN : 0);
}
static int aiu_encoder_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
struct snd_soc_dai *dai)
{
struct snd_soc_component *component = dai->component;
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
aiu_encoder_i2s_hold(component, false);
return 0;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_SUSPEND:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
aiu_encoder_i2s_hold(component, true);
return 0;
default:
return -EINVAL;
}
}
static int aiu_encoder_i2s_setup_desc(struct snd_soc_component *component,
struct snd_pcm_hw_params *params)
{
/* Always operate in split (classic interleaved) mode */
unsigned int desc = AIU_I2S_SOURCE_DESC_MODE_SPLIT;
unsigned int val;
/* Reset required to update the pipeline */
snd_soc_component_write(component, AIU_RST_SOFT, AIU_RST_SOFT_I2S_FAST);
snd_soc_component_read(component, AIU_I2S_SYNC, &val);
switch (params_physical_width(params)) {
case 16: /* Nothing to do */
break;
case 32:
desc |= (AIU_I2S_SOURCE_DESC_MODE_24BIT |
AIU_I2S_SOURCE_DESC_MODE_32BIT);
break;
default:
return -EINVAL;
}
switch (params_channels(params)) {
case 2: /* Nothing to do */
break;
case 8:
desc |= AIU_I2S_SOURCE_DESC_MODE_8CH;
break;
default:
return -EINVAL;
}
snd_soc_component_update_bits(component, AIU_I2S_SOURCE_DESC,
AIU_I2S_SOURCE_DESC_MODE_8CH |
AIU_I2S_SOURCE_DESC_MODE_24BIT |
AIU_I2S_SOURCE_DESC_MODE_32BIT |
AIU_I2S_SOURCE_DESC_MODE_SPLIT,
desc);
return 0;
}
static int aiu_encoder_i2s_set_clocks(struct snd_soc_component *component,
struct snd_pcm_hw_params *params)
{
struct aiu *aiu = snd_soc_component_get_drvdata(component);
unsigned int srate = params_rate(params);
unsigned int fs, bs;
/* Get the oversampling factor */
fs = DIV_ROUND_CLOSEST(clk_get_rate(aiu->i2s.clks[MCLK].clk), srate);
if (fs % 64)
return -EINVAL;
/* Send data MSB first */
snd_soc_component_update_bits(component, AIU_I2S_DAC_CFG,
AIU_I2S_DAC_CFG_MSB_FIRST,
AIU_I2S_DAC_CFG_MSB_FIRST);
/* Set bclk to lrlck ratio */
snd_soc_component_update_bits(component, AIU_CODEC_DAC_LRCLK_CTRL,
AIU_CODEC_DAC_LRCLK_CTRL_DIV,
FIELD_PREP(AIU_CODEC_DAC_LRCLK_CTRL_DIV,
64 - 1));
/* Use CLK_MORE for mclk to bclk divider */
snd_soc_component_update_bits(component, AIU_CLK_CTRL,
AIU_CLK_CTRL_I2S_DIV, 0);
/*
* NOTE: this HW is odd.
* In most configuration, the i2s divider is 'mclk / blck'.
* However, in 16 bits - 8ch mode, this factor needs to be
* increased by 50% to get the correct output rate.
* No idea why !
*/
bs = fs / 64;
if (params_width(params) == 16 && params_channels(params) == 8) {
if (bs % 2) {
dev_err(component->dev,
"Cannot increase i2s divider by 50%%\n");
return -EINVAL;
}
bs += bs / 2;
}
snd_soc_component_update_bits(component, AIU_CLK_CTRL_MORE,
AIU_CLK_CTRL_MORE_I2S_DIV,
FIELD_PREP(AIU_CLK_CTRL_MORE_I2S_DIV,
bs - 1));
/* Make sure amclk is used for HDMI i2s as well */
snd_soc_component_update_bits(component, AIU_CLK_CTRL_MORE,
AIU_CLK_CTRL_MORE_HDMI_AMCLK,
AIU_CLK_CTRL_MORE_HDMI_AMCLK);
return 0;
}
static int aiu_encoder_i2s_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct snd_soc_component *component = dai->component;
int ret;
/* Disable the clock while changing the settings */
aiu_encoder_i2s_divider_enable(component, false);
ret = aiu_encoder_i2s_setup_desc(component, params);
if (ret) {
dev_err(dai->dev, "setting i2s desc failed\n");
return ret;
}
ret = aiu_encoder_i2s_set_clocks(component, params);
if (ret) {
dev_err(dai->dev, "setting i2s clocks failed\n");
return ret;
}
aiu_encoder_i2s_divider_enable(component, true);
return 0;
}
static int aiu_encoder_i2s_hw_free(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct snd_soc_component *component = dai->component;
aiu_encoder_i2s_divider_enable(component, false);
return 0;
}
static int aiu_encoder_i2s_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
{
struct snd_soc_component *component = dai->component;
unsigned int inv = fmt & SND_SOC_DAIFMT_INV_MASK;
unsigned int val = 0;
unsigned int skew;
/* Only CPU Master / Codec Slave supported ATM */
if ((fmt & SND_SOC_DAIFMT_MASTER_MASK) != SND_SOC_DAIFMT_CBS_CFS)
return -EINVAL;
if (inv == SND_SOC_DAIFMT_NB_IF ||
inv == SND_SOC_DAIFMT_IB_IF)
val |= AIU_CLK_CTRL_LRCLK_INVERT;
if (inv == SND_SOC_DAIFMT_IB_NF ||
inv == SND_SOC_DAIFMT_IB_IF)
val |= AIU_CLK_CTRL_AOCLK_INVERT;
/* Signal skew */
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_I2S:
/* Invert sample clock for i2s */
val ^= AIU_CLK_CTRL_LRCLK_INVERT;
skew = 1;
break;
case SND_SOC_DAIFMT_LEFT_J:
skew = 0;
break;
default:
return -EINVAL;
}
val |= FIELD_PREP(AIU_CLK_CTRL_LRCLK_SKEW, skew);
snd_soc_component_update_bits(component, AIU_CLK_CTRL,
AIU_CLK_CTRL_LRCLK_INVERT |
AIU_CLK_CTRL_AOCLK_INVERT |
AIU_CLK_CTRL_LRCLK_SKEW,
val);
return 0;
}
static int aiu_encoder_i2s_set_sysclk(struct snd_soc_dai *dai, int clk_id,
unsigned int freq, int dir)
{
struct aiu *aiu = snd_soc_component_get_drvdata(dai->component);
int ret;
if (WARN_ON(clk_id != 0))
return -EINVAL;
if (dir == SND_SOC_CLOCK_IN)
return 0;
ret = clk_set_rate(aiu->i2s.clks[MCLK].clk, freq);
if (ret)
dev_err(dai->dev, "Failed to set sysclk to %uHz", freq);
return ret;
}
static const unsigned int hw_channels[] = {2, 8};
static const struct snd_pcm_hw_constraint_list hw_channel_constraints = {
.list = hw_channels,
.count = ARRAY_SIZE(hw_channels),
.mask = 0,
};
static int aiu_encoder_i2s_startup(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct aiu *aiu = snd_soc_component_get_drvdata(dai->component);
int ret;
/* Make sure the encoder gets either 2 or 8 channels */
ret = snd_pcm_hw_constraint_list(substream->runtime, 0,
SNDRV_PCM_HW_PARAM_CHANNELS,
&hw_channel_constraints);
if (ret) {
dev_err(dai->dev, "adding channels constraints failed\n");
return ret;
}
ret = clk_bulk_prepare_enable(aiu->i2s.clk_num, aiu->i2s.clks);
if (ret)
dev_err(dai->dev, "failed to enable i2s clocks\n");
return ret;
}
static void aiu_encoder_i2s_shutdown(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct aiu *aiu = snd_soc_component_get_drvdata(dai->component);
clk_bulk_disable_unprepare(aiu->i2s.clk_num, aiu->i2s.clks);
}
const struct snd_soc_dai_ops aiu_encoder_i2s_dai_ops = {
.trigger = aiu_encoder_i2s_trigger,
.hw_params = aiu_encoder_i2s_hw_params,
.hw_free = aiu_encoder_i2s_hw_free,
.set_fmt = aiu_encoder_i2s_set_fmt,
.set_sysclk = aiu_encoder_i2s_set_sysclk,
.startup = aiu_encoder_i2s_startup,
.shutdown = aiu_encoder_i2s_shutdown,
};

209
sound/soc/meson/aiu-encoder-spdif.c Normal file
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@ -0,0 +1,209 @@
// SPDX-License-Identifier: GPL-2.0
//
// Copyright (c) 2020 BayLibre, SAS.
// Author: Jerome Brunet <jbrunet@baylibre.com>
#include <linux/bitfield.h>
#include <linux/clk.h>
#include <sound/pcm_params.h>
#include <sound/pcm_iec958.h>
#include <sound/soc.h>
#include <sound/soc-dai.h>
#include "aiu.h"
#define AIU_958_MISC_NON_PCM BIT(0)
#define AIU_958_MISC_MODE_16BITS BIT(1)
#define AIU_958_MISC_16BITS_ALIGN GENMASK(6, 5)
#define AIU_958_MISC_MODE_32BITS BIT(7)
#define AIU_958_MISC_U_FROM_STREAM BIT(12)
#define AIU_958_MISC_FORCE_LR BIT(13)
#define AIU_958_CTRL_HOLD_EN BIT(0)
#define AIU_CLK_CTRL_958_DIV_EN BIT(1)
#define AIU_CLK_CTRL_958_DIV GENMASK(5, 4)
#define AIU_CLK_CTRL_958_DIV_MORE BIT(12)
#define AIU_CS_WORD_LEN 4
#define AIU_958_INTERNAL_DIV 2
static void
aiu_encoder_spdif_divider_enable(struct snd_soc_component *component,
bool enable)
{
snd_soc_component_update_bits(component, AIU_CLK_CTRL,
AIU_CLK_CTRL_958_DIV_EN,
enable ? AIU_CLK_CTRL_958_DIV_EN : 0);
}
static void aiu_encoder_spdif_hold(struct snd_soc_component *component,
bool enable)
{
snd_soc_component_update_bits(component, AIU_958_CTRL,
AIU_958_CTRL_HOLD_EN,
enable ? AIU_958_CTRL_HOLD_EN : 0);
}
static int
aiu_encoder_spdif_trigger(struct snd_pcm_substream *substream, int cmd,
struct snd_soc_dai *dai)
{
struct snd_soc_component *component = dai->component;
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
aiu_encoder_spdif_hold(component, false);
return 0;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_SUSPEND:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
aiu_encoder_spdif_hold(component, true);
return 0;
default:
return -EINVAL;
}
}
static int aiu_encoder_spdif_setup_cs_word(struct snd_soc_component *component,
struct snd_pcm_hw_params *params)
{
u8 cs[AIU_CS_WORD_LEN];
unsigned int val;
int ret;
ret = snd_pcm_create_iec958_consumer_hw_params(params, cs,
AIU_CS_WORD_LEN);
if (ret < 0)
return ret;
/* Write the 1st half word */
val = cs[1] | cs[0] << 8;
snd_soc_component_write(component, AIU_958_CHSTAT_L0, val);
snd_soc_component_write(component, AIU_958_CHSTAT_R0, val);
/* Write the 2nd half word */
val = cs[3] | cs[2] << 8;
snd_soc_component_write(component, AIU_958_CHSTAT_L1, val);
snd_soc_component_write(component, AIU_958_CHSTAT_R1, val);
return 0;
}
static int aiu_encoder_spdif_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct snd_soc_component *component = dai->component;
struct aiu *aiu = snd_soc_component_get_drvdata(component);
unsigned int val = 0, mrate;
int ret;
/* Disable the clock while changing the settings */
aiu_encoder_spdif_divider_enable(component, false);
switch (params_physical_width(params)) {
case 16:
val |= AIU_958_MISC_MODE_16BITS;
val |= FIELD_PREP(AIU_958_MISC_16BITS_ALIGN, 2);
break;
case 32:
val |= AIU_958_MISC_MODE_32BITS;
break;
default:
dev_err(dai->dev, "Unsupport physical width\n");
return -EINVAL;
}
snd_soc_component_update_bits(component, AIU_958_MISC,
AIU_958_MISC_NON_PCM |
AIU_958_MISC_MODE_16BITS |
AIU_958_MISC_16BITS_ALIGN |
AIU_958_MISC_MODE_32BITS |
AIU_958_MISC_FORCE_LR |
AIU_958_MISC_U_FROM_STREAM,
val);
/* Set the stream channel status word */
ret = aiu_encoder_spdif_setup_cs_word(component, params);
if (ret) {
dev_err(dai->dev, "failed to set channel status word\n");
return ret;
}
snd_soc_component_update_bits(component, AIU_CLK_CTRL,
AIU_CLK_CTRL_958_DIV |
AIU_CLK_CTRL_958_DIV_MORE,
FIELD_PREP(AIU_CLK_CTRL_958_DIV,
__ffs(AIU_958_INTERNAL_DIV)));
/* 2 * 32bits per subframe * 2 channels = 128 */
mrate = params_rate(params) * 128 * AIU_958_INTERNAL_DIV;
ret = clk_set_rate(aiu->spdif.clks[MCLK].clk, mrate);
if (ret) {
dev_err(dai->dev, "failed to set mclk rate\n");
return ret;
}
aiu_encoder_spdif_divider_enable(component, true);
return 0;
}
static int aiu_encoder_spdif_hw_free(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct snd_soc_component *component = dai->component;
aiu_encoder_spdif_divider_enable(component, false);
return 0;
}
static int aiu_encoder_spdif_startup(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct aiu *aiu = snd_soc_component_get_drvdata(dai->component);
int ret;
/*
* NOTE: Make sure the spdif block is on its own divider.
*
* The spdif can be clocked by the i2s master clock or its own
* clock. We should (in theory) change the source depending on the
* origin of the data.
*
* However, considering the clocking scheme used on these platforms,
* the master clocks will pick the same PLL source when they are
* playing from the same FIFO. The clock should be in sync so, it
* should not be necessary to reparent the spdif master clock.
*/
ret = clk_set_parent(aiu->spdif.clks[MCLK].clk,
aiu->spdif_mclk);
if (ret)
return ret;
ret = clk_bulk_prepare_enable(aiu->spdif.clk_num, aiu->spdif.clks);
if (ret)
dev_err(dai->dev, "failed to enable spdif clocks\n");
return ret;
}
static void aiu_encoder_spdif_shutdown(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct aiu *aiu = snd_soc_component_get_drvdata(dai->component);
clk_bulk_disable_unprepare(aiu->spdif.clk_num, aiu->spdif.clks);
}
const struct snd_soc_dai_ops aiu_encoder_spdif_dai_ops = {
.trigger = aiu_encoder_spdif_trigger,
.hw_params = aiu_encoder_spdif_hw_params,
.hw_free = aiu_encoder_spdif_hw_free,
.startup = aiu_encoder_spdif_startup,
.shutdown = aiu_encoder_spdif_shutdown,
};

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sound/soc/meson/aiu-fifo-i2s.c Normal file
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// SPDX-License-Identifier: GPL-2.0
//
// Copyright (c) 2020 BayLibre, SAS.
// Author: Jerome Brunet <jbrunet@baylibre.com>
#include <linux/bitfield.h>
#include <linux/clk.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/soc-dai.h>
#include "aiu.h"
#include "aiu-fifo.h"
#define AIU_I2S_SOURCE_DESC_MODE_8CH BIT(0)
#define AIU_I2S_SOURCE_DESC_MODE_24BIT BIT(5)
#define AIU_I2S_SOURCE_DESC_MODE_32BIT BIT(9)
#define AIU_I2S_SOURCE_DESC_MODE_SPLIT BIT(11)
#define AIU_MEM_I2S_MASKS_IRQ_BLOCK GENMASK(31, 16)
#define AIU_MEM_I2S_CONTROL_MODE_16BIT BIT(6)
#define AIU_MEM_I2S_BUF_CNTL_INIT BIT(0)
#define AIU_RST_SOFT_I2S_FAST BIT(0)
#define AIU_FIFO_I2S_BLOCK 256
static struct snd_pcm_hardware fifo_i2s_pcm = {
.info = (SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_MMAP |
SNDRV_PCM_INFO_MMAP_VALID |
SNDRV_PCM_INFO_PAUSE),
.formats = AIU_FORMATS,
.rate_min = 5512,
.rate_max = 192000,
.channels_min = 2,
.channels_max = 8,
.period_bytes_min = AIU_FIFO_I2S_BLOCK,
.period_bytes_max = AIU_FIFO_I2S_BLOCK * USHRT_MAX,
.periods_min = 2,
.periods_max = UINT_MAX,
/* No real justification for this */
.buffer_bytes_max = 1 * 1024 * 1024,
};
static int aiu_fifo_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
struct snd_soc_dai *dai)
{
struct snd_soc_component *component = dai->component;
unsigned int val;
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
snd_soc_component_write(component, AIU_RST_SOFT,
AIU_RST_SOFT_I2S_FAST);
snd_soc_component_read(component, AIU_I2S_SYNC, &val);
break;
}
return aiu_fifo_trigger(substream, cmd, dai);
}
static int aiu_fifo_i2s_prepare(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct snd_soc_component *component = dai->component;
int ret;
ret = aiu_fifo_prepare(substream, dai);
if (ret)
return ret;
snd_soc_component_update_bits(component,
AIU_MEM_I2S_BUF_CNTL,
AIU_MEM_I2S_BUF_CNTL_INIT,
AIU_MEM_I2S_BUF_CNTL_INIT);
snd_soc_component_update_bits(component,
AIU_MEM_I2S_BUF_CNTL,
AIU_MEM_I2S_BUF_CNTL_INIT, 0);
return 0;
}
static int aiu_fifo_i2s_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct snd_soc_component *component = dai->component;
struct aiu_fifo *fifo = dai->playback_dma_data;
unsigned int val;
int ret;
ret = aiu_fifo_hw_params(substream, params, dai);
if (ret)
return ret;
switch (params_physical_width(params)) {
case 16:
val = AIU_MEM_I2S_CONTROL_MODE_16BIT;
break;
case 32:
val = 0;
break;
default:
dev_err(dai->dev, "Unsupported physical width %u\n",
params_physical_width(params));
return -EINVAL;
}
snd_soc_component_update_bits(component, AIU_MEM_I2S_CONTROL,
AIU_MEM_I2S_CONTROL_MODE_16BIT,
val);
/* Setup the irq periodicity */
val = params_period_bytes(params) / fifo->fifo_block;
val = FIELD_PREP(AIU_MEM_I2S_MASKS_IRQ_BLOCK, val);
snd_soc_component_update_bits(component, AIU_MEM_I2S_MASKS,
AIU_MEM_I2S_MASKS_IRQ_BLOCK, val);
return 0;
}
const struct snd_soc_dai_ops aiu_fifo_i2s_dai_ops = {
.trigger = aiu_fifo_i2s_trigger,
.prepare = aiu_fifo_i2s_prepare,
.hw_params = aiu_fifo_i2s_hw_params,
.hw_free = aiu_fifo_hw_free,
.startup = aiu_fifo_startup,
.shutdown = aiu_fifo_shutdown,
};
int aiu_fifo_i2s_dai_probe(struct snd_soc_dai *dai)
{
struct snd_soc_component *component = dai->component;
struct aiu *aiu = snd_soc_component_get_drvdata(component);
struct aiu_fifo *fifo;
int ret;
ret = aiu_fifo_dai_probe(dai);
if (ret)
return ret;
fifo = dai->playback_dma_data;
fifo->pcm = &fifo_i2s_pcm;
fifo->mem_offset = AIU_MEM_I2S_START;
fifo->fifo_block = AIU_FIFO_I2S_BLOCK;
fifo->pclk = aiu->i2s.clks[PCLK].clk;
fifo->irq = aiu->i2s.irq;
return 0;
}

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// SPDX-License-Identifier: GPL-2.0
//
// Copyright (c) 2020 BayLibre, SAS.
// Author: Jerome Brunet <jbrunet@baylibre.com>
#include <linux/clk.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/soc-dai.h>
#include "aiu.h"
#include "aiu-fifo.h"
#define AIU_IEC958_DCU_FF_CTRL_EN BIT(0)
#define AIU_IEC958_DCU_FF_CTRL_AUTO_DISABLE BIT(1)
#define AIU_IEC958_DCU_FF_CTRL_IRQ_MODE GENMASK(3, 2)
#define AIU_IEC958_DCU_FF_CTRL_IRQ_OUT_THD BIT(2)
#define AIU_IEC958_DCU_FF_CTRL_IRQ_FRAME_READ BIT(3)
#define AIU_IEC958_DCU_FF_CTRL_SYNC_HEAD_EN BIT(4)
#define AIU_IEC958_DCU_FF_CTRL_BYTE_SEEK BIT(5)
#define AIU_IEC958_DCU_FF_CTRL_CONTINUE BIT(6)
#define AIU_MEM_IEC958_CONTROL_ENDIAN GENMASK(5, 3)
#define AIU_MEM_IEC958_CONTROL_RD_DDR BIT(6)
#define AIU_MEM_IEC958_CONTROL_MODE_16BIT BIT(7)
#define AIU_MEM_IEC958_CONTROL_MODE_LINEAR BIT(8)
#define AIU_MEM_IEC958_BUF_CNTL_INIT BIT(0)
#define AIU_FIFO_SPDIF_BLOCK 8
static struct snd_pcm_hardware fifo_spdif_pcm = {
.info = (SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_MMAP |
SNDRV_PCM_INFO_MMAP_VALID |
SNDRV_PCM_INFO_PAUSE),
.formats = AIU_FORMATS,
.rate_min = 5512,
.rate_max = 192000,
.channels_min = 2,
.channels_max = 2,
.period_bytes_min = AIU_FIFO_SPDIF_BLOCK,
.period_bytes_max = AIU_FIFO_SPDIF_BLOCK * USHRT_MAX,
.periods_min = 2,
.periods_max = UINT_MAX,
/* No real justification for this */
.buffer_bytes_max = 1 * 1024 * 1024,
};
static void fifo_spdif_dcu_enable(struct snd_soc_component *component,
bool enable)
{
snd_soc_component_update_bits(component, AIU_IEC958_DCU_FF_CTRL,
AIU_IEC958_DCU_FF_CTRL_EN,
enable ? AIU_IEC958_DCU_FF_CTRL_EN : 0);
}
static int fifo_spdif_trigger(struct snd_pcm_substream *substream, int cmd,
struct snd_soc_dai *dai)
{
struct snd_soc_component *component = dai->component;
int ret;
ret = aiu_fifo_trigger(substream, cmd, dai);
if (ret)
return ret;
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
fifo_spdif_dcu_enable(component, true);
break;
case SNDRV_PCM_TRIGGER_SUSPEND:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
case SNDRV_PCM_TRIGGER_STOP:
fifo_spdif_dcu_enable(component, false);
break;
default:
return -EINVAL;
}
return 0;
}
static int fifo_spdif_prepare(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct snd_soc_component *component = dai->component;
int ret;
ret = aiu_fifo_prepare(substream, dai);
if (ret)
return ret;
snd_soc_component_update_bits(component,
AIU_MEM_IEC958_BUF_CNTL,
AIU_MEM_IEC958_BUF_CNTL_INIT,
AIU_MEM_IEC958_BUF_CNTL_INIT);
snd_soc_component_update_bits(component,
AIU_MEM_IEC958_BUF_CNTL,
AIU_MEM_IEC958_BUF_CNTL_INIT, 0);
return 0;
}
static int fifo_spdif_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct snd_soc_component *component = dai->component;
unsigned int val;
int ret;
ret = aiu_fifo_hw_params(substream, params, dai);
if (ret)
return ret;
val = AIU_MEM_IEC958_CONTROL_RD_DDR |
AIU_MEM_IEC958_CONTROL_MODE_LINEAR;
switch (params_physical_width(params)) {
case 16:
val |= AIU_MEM_IEC958_CONTROL_MODE_16BIT;
break;
case 32:
break;
default:
dev_err(dai->dev, "Unsupported physical width %u\n",
params_physical_width(params));
return -EINVAL;
}
snd_soc_component_update_bits(component, AIU_MEM_IEC958_CONTROL,
AIU_MEM_IEC958_CONTROL_ENDIAN |
AIU_MEM_IEC958_CONTROL_RD_DDR |
AIU_MEM_IEC958_CONTROL_MODE_LINEAR |
AIU_MEM_IEC958_CONTROL_MODE_16BIT,
val);
/* Number bytes read by the FIFO between each IRQ */
snd_soc_component_write(component, AIU_IEC958_BPF,
params_period_bytes(params));
/*
* AUTO_DISABLE and SYNC_HEAD are enabled by default but
* this should be disabled in PCM (uncompressed) mode
*/
snd_soc_component_update_bits(component, AIU_IEC958_DCU_FF_CTRL,
AIU_IEC958_DCU_FF_CTRL_AUTO_DISABLE |
AIU_IEC958_DCU_FF_CTRL_IRQ_MODE |
AIU_IEC958_DCU_FF_CTRL_SYNC_HEAD_EN,
AIU_IEC958_DCU_FF_CTRL_IRQ_FRAME_READ);
return 0;
}
const struct snd_soc_dai_ops aiu_fifo_spdif_dai_ops = {
.trigger = fifo_spdif_trigger,
.prepare = fifo_spdif_prepare,
.hw_params = fifo_spdif_hw_params,
.hw_free = aiu_fifo_hw_free,
.startup = aiu_fifo_startup,
.shutdown = aiu_fifo_shutdown,
};
int aiu_fifo_spdif_dai_probe(struct snd_soc_dai *dai)
{
struct snd_soc_component *component = dai->component;
struct aiu *aiu = snd_soc_component_get_drvdata(component);
struct aiu_fifo *fifo;
int ret;
ret = aiu_fifo_dai_probe(dai);
if (ret)
return ret;
fifo = dai->playback_dma_data;
fifo->pcm = &fifo_spdif_pcm;
fifo->mem_offset = AIU_MEM_IEC958_START;
fifo->fifo_block = 1;
fifo->pclk = aiu->spdif.clks[PCLK].clk;
fifo->irq = aiu->spdif.irq;
return 0;
}

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sound/soc/meson/aiu-fifo.c Normal file
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// SPDX-License-Identifier: GPL-2.0
//
// Copyright (c) 2020 BayLibre, SAS.
// Author: Jerome Brunet <jbrunet@baylibre.com>
#include <linux/bitfield.h>
#include <linux/clk.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/soc-dai.h>
#include "aiu-fifo.h"
#define AIU_MEM_START 0x00
#define AIU_MEM_RD 0x04
#define AIU_MEM_END 0x08
#define AIU_MEM_MASKS 0x0c
#define AIU_MEM_MASK_CH_RD GENMASK(7, 0)
#define AIU_MEM_MASK_CH_MEM GENMASK(15, 8)
#define AIU_MEM_CONTROL 0x10
#define AIU_MEM_CONTROL_INIT BIT(0)
#define AIU_MEM_CONTROL_FILL_EN BIT(1)
#define AIU_MEM_CONTROL_EMPTY_EN BIT(2)
static struct snd_soc_dai *aiu_fifo_dai(struct snd_pcm_substream *ss)
{
struct snd_soc_pcm_runtime *rtd = ss->private_data;
return rtd->cpu_dai;
}
snd_pcm_uframes_t aiu_fifo_pointer(struct snd_soc_component *component,
struct snd_pcm_substream *substream)
{
struct snd_soc_dai *dai = aiu_fifo_dai(substream);
struct aiu_fifo *fifo = dai->playback_dma_data;
struct snd_pcm_runtime *runtime = substream->runtime;
unsigned int addr;
snd_soc_component_read(component, fifo->mem_offset + AIU_MEM_RD,
&addr);
return bytes_to_frames(runtime, addr - (unsigned int)runtime->dma_addr);
}
static void aiu_fifo_enable(struct snd_soc_dai *dai, bool enable)
{
struct snd_soc_component *component = dai->component;
struct aiu_fifo *fifo = dai->playback_dma_data;
unsigned int en_mask = (AIU_MEM_CONTROL_FILL_EN |
AIU_MEM_CONTROL_EMPTY_EN);
snd_soc_component_update_bits(component,
fifo->mem_offset + AIU_MEM_CONTROL,
en_mask, enable ? en_mask : 0);
}
int aiu_fifo_trigger(struct snd_pcm_substream *substream, int cmd,
struct snd_soc_dai *dai)
{
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
aiu_fifo_enable(dai, true);
break;
case SNDRV_PCM_TRIGGER_SUSPEND:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
case SNDRV_PCM_TRIGGER_STOP:
aiu_fifo_enable(dai, false);
break;
default:
return -EINVAL;
}
return 0;
}
int aiu_fifo_prepare(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct snd_soc_component *component = dai->component;
struct aiu_fifo *fifo = dai->playback_dma_data;
snd_soc_component_update_bits(component,
fifo->mem_offset + AIU_MEM_CONTROL,
AIU_MEM_CONTROL_INIT,
AIU_MEM_CONTROL_INIT);
snd_soc_component_update_bits(component,
fifo->mem_offset + AIU_MEM_CONTROL,
AIU_MEM_CONTROL_INIT, 0);
return 0;
}
int aiu_fifo_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct snd_soc_component *component = dai->component;
struct aiu_fifo *fifo = dai->playback_dma_data;
dma_addr_t end;
int ret;
ret = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
if (ret < 0)
return ret;
/* Setup the fifo boundaries */
end = runtime->dma_addr + runtime->dma_bytes - fifo->fifo_block;
snd_soc_component_write(component, fifo->mem_offset + AIU_MEM_START,
runtime->dma_addr);
snd_soc_component_write(component, fifo->mem_offset + AIU_MEM_RD,
runtime->dma_addr);
snd_soc_component_write(component, fifo->mem_offset + AIU_MEM_END,
end);
/* Setup the fifo to read all the memory - no skip */
snd_soc_component_update_bits(component,
fifo->mem_offset + AIU_MEM_MASKS,
AIU_MEM_MASK_CH_RD | AIU_MEM_MASK_CH_MEM,
FIELD_PREP(AIU_MEM_MASK_CH_RD, 0xff) |
FIELD_PREP(AIU_MEM_MASK_CH_MEM, 0xff));
return 0;
}
int aiu_fifo_hw_free(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
return snd_pcm_lib_free_pages(substream);
}
static irqreturn_t aiu_fifo_isr(int irq, void *dev_id)
{
struct snd_pcm_substream *playback = dev_id;
snd_pcm_period_elapsed(playback);
return IRQ_HANDLED;
}
int aiu_fifo_startup(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct aiu_fifo *fifo = dai->playback_dma_data;
int ret;
snd_soc_set_runtime_hwparams(substream, fifo->pcm);
/*
* Make sure the buffer and period size are multiple of the fifo burst
* size
*/
ret = snd_pcm_hw_constraint_step(substream->runtime, 0,
SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
fifo->fifo_block);
if (ret)
return ret;
ret = snd_pcm_hw_constraint_step(substream->runtime, 0,
SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
fifo->fifo_block);
if (ret)
return ret;
ret = clk_prepare_enable(fifo->pclk);
if (ret)
return ret;
ret = request_irq(fifo->irq, aiu_fifo_isr, 0, dev_name(dai->dev),
substream);
if (ret)
clk_disable_unprepare(fifo->pclk);
return ret;
}
void aiu_fifo_shutdown(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct aiu_fifo *fifo = dai->playback_dma_data;
free_irq(fifo->irq, substream);
clk_disable_unprepare(fifo->pclk);
}
int aiu_fifo_pcm_new(struct snd_soc_pcm_runtime *rtd,
struct snd_soc_dai *dai)
{
struct snd_pcm_substream *substream =
rtd->pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream;
struct snd_card *card = rtd->card->snd_card;
struct aiu_fifo *fifo = dai->playback_dma_data;
size_t size = fifo->pcm->buffer_bytes_max;
snd_pcm_lib_preallocate_pages(substream,
SNDRV_DMA_TYPE_DEV,
card->dev, size, size);
return 0;
}
int aiu_fifo_dai_probe(struct snd_soc_dai *dai)
{
struct aiu_fifo *fifo;
fifo = kzalloc(sizeof(*fifo), GFP_KERNEL);
if (!fifo)
return -ENOMEM;
dai->playback_dma_data = fifo;
return 0;
}
int aiu_fifo_dai_remove(struct snd_soc_dai *dai)
{
kfree(dai->playback_dma_data);
return 0;
}

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sound/soc/meson/aiu-fifo.h Normal file
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/* SPDX-License-Identifier: (GPL-2.0 OR MIT) */
/*
* Copyright (c) 2020 BayLibre, SAS.
* Author: Jerome Brunet <jbrunet@baylibre.com>
*/
#ifndef _MESON_AIU_FIFO_H
#define _MESON_AIU_FIFO_H
struct snd_pcm_hardware;
struct snd_soc_component_driver;
struct snd_soc_dai_driver;
struct clk;
struct snd_pcm_ops;
struct snd_pcm_substream;
struct snd_soc_dai;
struct snd_pcm_hw_params;
struct platform_device;
struct aiu_fifo {
struct snd_pcm_hardware *pcm;
unsigned int mem_offset;
unsigned int fifo_block;
struct clk *pclk;
int irq;
};
int aiu_fifo_dai_probe(struct snd_soc_dai *dai);
int aiu_fifo_dai_remove(struct snd_soc_dai *dai);
snd_pcm_uframes_t aiu_fifo_pointer(struct snd_soc_component *component,
struct snd_pcm_substream *substream);
int aiu_fifo_trigger(struct snd_pcm_substream *substream, int cmd,
struct snd_soc_dai *dai);
int aiu_fifo_prepare(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai);
int aiu_fifo_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai);
int aiu_fifo_hw_free(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai);
int aiu_fifo_startup(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai);
void aiu_fifo_shutdown(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai);
int aiu_fifo_pcm_new(struct snd_soc_pcm_runtime *rtd,
struct snd_soc_dai *dai);
#endif /* _MESON_AIU_FIFO_H */

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// SPDX-License-Identifier: GPL-2.0
//
// Copyright (c) 2020 BayLibre, SAS.
// Author: Jerome Brunet <jbrunet@baylibre.com>
#include <linux/bitfield.h>
#include <linux/clk.h>
#include <linux/module.h>
#include <linux/of_platform.h>
#include <linux/regmap.h>
#include <linux/reset.h>
#include <sound/soc.h>
#include <sound/soc-dai.h>
#include <dt-bindings/sound/meson-aiu.h>
#include "aiu.h"
#include "aiu-fifo.h"
#define AIU_I2S_MISC_958_SRC_SHIFT 3
static const char * const aiu_spdif_encode_sel_texts[] = {
"SPDIF", "I2S",
};
static SOC_ENUM_SINGLE_DECL(aiu_spdif_encode_sel_enum, AIU_I2S_MISC,
AIU_I2S_MISC_958_SRC_SHIFT,
aiu_spdif_encode_sel_texts);
static const struct snd_kcontrol_new aiu_spdif_encode_mux =
SOC_DAPM_ENUM("SPDIF Buffer Src", aiu_spdif_encode_sel_enum);
static const struct snd_soc_dapm_widget aiu_cpu_dapm_widgets[] = {
SND_SOC_DAPM_MUX("SPDIF SRC SEL", SND_SOC_NOPM, 0, 0,
&aiu_spdif_encode_mux),
};
static const struct snd_soc_dapm_route aiu_cpu_dapm_routes[] = {
{ "I2S Encoder Playback", NULL, "I2S FIFO Playback" },
{ "SPDIF SRC SEL", "SPDIF", "SPDIF FIFO Playback" },
{ "SPDIF SRC SEL", "I2S", "I2S FIFO Playback" },
{ "SPDIF Encoder Playback", NULL, "SPDIF SRC SEL" },
};
int aiu_of_xlate_dai_name(struct snd_soc_component *component,
struct of_phandle_args *args,
const char **dai_name,
unsigned int component_id)
{
struct snd_soc_dai *dai;
int id;
if (args->args_count != 2)
return -EINVAL;
if (args->args[0] != component_id)
return -EINVAL;
id = args->args[1];
if (id < 0 || id >= component->num_dai)
return -EINVAL;
for_each_component_dais(component, dai) {
if (id == 0)
break;
id--;
}
*dai_name = dai->driver->name;
return 0;
}
static int aiu_cpu_of_xlate_dai_name(struct snd_soc_component *component,
struct of_phandle_args *args,
const char **dai_name)
{
return aiu_of_xlate_dai_name(component, args, dai_name, AIU_CPU);
}
static int aiu_cpu_component_probe(struct snd_soc_component *component)
{
struct aiu *aiu = snd_soc_component_get_drvdata(component);
/* Required for the SPDIF Source control operation */
return clk_prepare_enable(aiu->i2s.clks[PCLK].clk);
}
static void aiu_cpu_component_remove(struct snd_soc_component *component)
{
struct aiu *aiu = snd_soc_component_get_drvdata(component);
clk_disable_unprepare(aiu->i2s.clks[PCLK].clk);
}
static const struct snd_soc_component_driver aiu_cpu_component = {
.name = "AIU CPU",
.dapm_widgets = aiu_cpu_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(aiu_cpu_dapm_widgets),
.dapm_routes = aiu_cpu_dapm_routes,
.num_dapm_routes = ARRAY_SIZE(aiu_cpu_dapm_routes),
.of_xlate_dai_name = aiu_cpu_of_xlate_dai_name,
.pointer = aiu_fifo_pointer,
.probe = aiu_cpu_component_probe,
.remove = aiu_cpu_component_remove,
};
static struct snd_soc_dai_driver aiu_cpu_dai_drv[] = {
[CPU_I2S_FIFO] = {
.name = "I2S FIFO",
.playback = {
.stream_name = "I2S FIFO Playback",
.channels_min = 2,
.channels_max = 8,
.rates = SNDRV_PCM_RATE_CONTINUOUS,
.rate_min = 5512,
.rate_max = 192000,
.formats = AIU_FORMATS,
},
.ops = &aiu_fifo_i2s_dai_ops,
.pcm_new = aiu_fifo_pcm_new,
.probe = aiu_fifo_i2s_dai_probe,
.remove = aiu_fifo_dai_remove,
},
[CPU_SPDIF_FIFO] = {
.name = "SPDIF FIFO",
.playback = {
.stream_name = "SPDIF FIFO Playback",
.channels_min = 2,
.channels_max = 2,
.rates = SNDRV_PCM_RATE_CONTINUOUS,
.rate_min = 5512,
.rate_max = 192000,
.formats = AIU_FORMATS,
},
.ops = &aiu_fifo_spdif_dai_ops,
.pcm_new = aiu_fifo_pcm_new,
.probe = aiu_fifo_spdif_dai_probe,
.remove = aiu_fifo_dai_remove,
},
[CPU_I2S_ENCODER] = {
.name = "I2S Encoder",
.playback = {
.stream_name = "I2S Encoder Playback",
.channels_min = 2,
.channels_max = 8,
.rates = SNDRV_PCM_RATE_8000_192000,
.formats = AIU_FORMATS,
},
.ops = &aiu_encoder_i2s_dai_ops,
},
[CPU_SPDIF_ENCODER] = {
.name = "SPDIF Encoder",
.playback = {
.stream_name = "SPDIF Encoder Playback",
.channels_min = 2,
.channels_max = 2,
.rates = (SNDRV_PCM_RATE_32000 |
SNDRV_PCM_RATE_44100 |
SNDRV_PCM_RATE_48000 |
SNDRV_PCM_RATE_88200 |
SNDRV_PCM_RATE_96000 |
SNDRV_PCM_RATE_176400 |
SNDRV_PCM_RATE_192000),
.formats = AIU_FORMATS,
},
.ops = &aiu_encoder_spdif_dai_ops,
}
};
static const struct regmap_config aiu_regmap_cfg = {
.reg_bits = 32,
.val_bits = 32,
.reg_stride = 4,
.max_register = 0x2ac,
};
static int aiu_clk_bulk_get(struct device *dev,
const char * const *ids,
unsigned int num,
struct aiu_interface *interface)
{
struct clk_bulk_data *clks;
int i, ret;
clks = devm_kcalloc(dev, num, sizeof(clks), GFP_KERNEL);
if (!clks)
return -ENOMEM;
for (i = 0; i < num; i++)
clks[i].id = ids[i];
ret = devm_clk_bulk_get(dev, num, clks);
if (ret < 0)
return ret;
interface->clks = clks;
interface->clk_num = num;
return 0;
}
static const char * const aiu_i2s_ids[] = {
[PCLK] = "i2s_pclk",
[AOCLK] = "i2s_aoclk",
[MCLK] = "i2s_mclk",
[MIXER] = "i2s_mixer",
};
static const char * const aiu_spdif_ids[] = {
[PCLK] = "spdif_pclk",
[AOCLK] = "spdif_aoclk",
[MCLK] = "spdif_mclk_sel"
};
static int aiu_clk_get(struct device *dev)
{
struct aiu *aiu = dev_get_drvdata(dev);
int ret;
aiu->pclk = devm_clk_get(dev, "pclk");
if (IS_ERR(aiu->pclk)) {
if (PTR_ERR(aiu->pclk) != -EPROBE_DEFER)
dev_err(dev, "Can't get the aiu pclk\n");
return PTR_ERR(aiu->pclk);
}
aiu->spdif_mclk = devm_clk_get(dev, "spdif_mclk");
if (IS_ERR(aiu->spdif_mclk)) {
if (PTR_ERR(aiu->spdif_mclk) != -EPROBE_DEFER)
dev_err(dev, "Can't get the aiu spdif master clock\n");
return PTR_ERR(aiu->spdif_mclk);
}
ret = aiu_clk_bulk_get(dev, aiu_i2s_ids, ARRAY_SIZE(aiu_i2s_ids),
&aiu->i2s);
if (ret) {
if (ret != -EPROBE_DEFER)
dev_err(dev, "Can't get the i2s clocks\n");
return ret;
}
ret = aiu_clk_bulk_get(dev, aiu_spdif_ids, ARRAY_SIZE(aiu_spdif_ids),
&aiu->spdif);
if (ret) {
if (ret != -EPROBE_DEFER)
dev_err(dev, "Can't get the spdif clocks\n");
return ret;
}
ret = clk_prepare_enable(aiu->pclk);
if (ret) {
dev_err(dev, "peripheral clock enable failed\n");
return ret;
}
ret = devm_add_action_or_reset(dev,
(void(*)(void *))clk_disable_unprepare,
aiu->pclk);
if (ret)
dev_err(dev, "failed to add reset action on pclk");
return ret;
}
static int aiu_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
void __iomem *regs;
struct regmap *map;
struct aiu *aiu;
int ret;
aiu = devm_kzalloc(dev, sizeof(*aiu), GFP_KERNEL);
if (!aiu)
return -ENOMEM;
platform_set_drvdata(pdev, aiu);
ret = device_reset(dev);
if (ret) {
if (ret != -EPROBE_DEFER)
dev_err(dev, "Failed to reset device\n");
return ret;
}
regs = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(regs))
return PTR_ERR(regs);
map = devm_regmap_init_mmio(dev, regs, &aiu_regmap_cfg);
if (IS_ERR(map)) {
dev_err(dev, "failed to init regmap: %ld\n",
PTR_ERR(map));
return PTR_ERR(map);
}
aiu->i2s.irq = platform_get_irq_byname(pdev, "i2s");
if (aiu->i2s.irq < 0) {
dev_err(dev, "Can't get i2s irq\n");
return aiu->i2s.irq;
}
aiu->spdif.irq = platform_get_irq_byname(pdev, "spdif");
if (aiu->spdif.irq < 0) {
dev_err(dev, "Can't get spdif irq\n");
return aiu->spdif.irq;
}
ret = aiu_clk_get(dev);
if (ret)
return ret;
/* Register the cpu component of the aiu */
ret = snd_soc_register_component(dev, &aiu_cpu_component,
aiu_cpu_dai_drv,
ARRAY_SIZE(aiu_cpu_dai_drv));
if (ret)
dev_err(dev, "Failed to register cpu component\n");
return ret;
}
static int aiu_remove(struct platform_device *pdev)
{
snd_soc_unregister_component(&pdev->dev);
return 0;
}
static const struct of_device_id aiu_of_match[] = {
{ .compatible = "amlogic,aiu-gxbb", },
{ .compatible = "amlogic,aiu-gxl", },
{}
};
MODULE_DEVICE_TABLE(of, aiu_of_match);
static struct platform_driver aiu_pdrv = {
.probe = aiu_probe,
.remove = aiu_remove,
.driver = {
.name = "meson-aiu",
.of_match_table = aiu_of_match,
},
};
module_platform_driver(aiu_pdrv);
MODULE_DESCRIPTION("Meson AIU Driver");
MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>");
MODULE_LICENSE("GPL v2");

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sound/soc/meson/aiu.h Normal file
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/* SPDX-License-Identifier: (GPL-2.0 OR MIT) */
/*
* Copyright (c) 2018 BayLibre, SAS.
* Author: Jerome Brunet <jbrunet@baylibre.com>
*/
#ifndef _MESON_AIU_H
#define _MESON_AIU_H
struct clk;
struct clk_bulk_data;
struct device;
struct of_phandle_args;
struct snd_soc_component_driver;
struct snd_soc_dai;
struct snd_soc_dai_driver;
struct snd_soc_dai_ops;
enum aiu_clk_ids {
PCLK = 0,
AOCLK,
MCLK,
MIXER
};
struct aiu_interface {
struct clk_bulk_data *clks;
unsigned int clk_num;
unsigned int irq;
};
struct aiu {
struct clk *pclk;
struct clk *spdif_mclk;
struct aiu_interface i2s;
struct aiu_interface spdif;
};
#define AIU_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \
SNDRV_PCM_FMTBIT_S20_LE | \
SNDRV_PCM_FMTBIT_S24_LE)
int aiu_of_xlate_dai_name(struct snd_soc_component *component,
struct of_phandle_args *args,
const char **dai_name,
unsigned int component_id);
int aiu_fifo_i2s_dai_probe(struct snd_soc_dai *dai);
int aiu_fifo_spdif_dai_probe(struct snd_soc_dai *dai);
extern const struct snd_soc_dai_ops aiu_fifo_i2s_dai_ops;
extern const struct snd_soc_dai_ops aiu_fifo_spdif_dai_ops;
extern const struct snd_soc_dai_ops aiu_encoder_i2s_dai_ops;
extern const struct snd_soc_dai_ops aiu_encoder_spdif_dai_ops;
#define AIU_IEC958_BPF 0x000
#define AIU_958_MISC 0x010
#define AIU_IEC958_DCU_FF_CTRL 0x01c
#define AIU_958_CHSTAT_L0 0x020
#define AIU_958_CHSTAT_L1 0x024
#define AIU_958_CTRL 0x028
#define AIU_I2S_SOURCE_DESC 0x034
#define AIU_I2S_DAC_CFG 0x040
#define AIU_I2S_SYNC 0x044
#define AIU_I2S_MISC 0x048
#define AIU_RST_SOFT 0x054
#define AIU_CLK_CTRL 0x058
#define AIU_CLK_CTRL_MORE 0x064
#define AIU_CODEC_DAC_LRCLK_CTRL 0x0a0
#define AIU_HDMI_CLK_DATA_CTRL 0x0a8
#define AIU_ACODEC_CTRL 0x0b0
#define AIU_958_CHSTAT_R0 0x0c0
#define AIU_958_CHSTAT_R1 0x0c4
#define AIU_MEM_I2S_START 0x180
#define AIU_MEM_I2S_MASKS 0x18c
#define AIU_MEM_I2S_CONTROL 0x190
#define AIU_MEM_IEC958_START 0x194
#define AIU_MEM_IEC958_CONTROL 0x1a4
#define AIU_MEM_I2S_BUF_CNTL 0x1d8
#define AIU_MEM_IEC958_BUF_CNTL 0x1fc
#endif /* _MESON_AIU_H */