ASoC: sti: Add CPU DAI driver for playback

Add code to manage Uniperipheral player IP instances.
These DAIs are dedicated to playback and support I2S and IEC modes.

Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@st.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Arnaud Pouliquen 2015-06-22 16:31:07 +02:00 committed by Mark Brown
parent e1ecace6a6
commit 76c2145ded
2 changed files with 1006 additions and 0 deletions

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@ -10,6 +10,8 @@
#include <linux/regmap.h>
#include <sound/dmaengine_pcm.h>
/*
* Register access macros
*/
@ -1097,3 +1099,117 @@
UNIPERIF_DBG_STANDBY_LEFT_SP_OFFSET(ip), \
UNIPERIF_DBG_STANDBY_LEFT_SP_SHIFT(ip), \
UNIPERIF_DBG_STANDBY_LEFT_SP_MASK(ip), value)
/*
* uniperipheral IP capabilities
*/
#define UNIPERIF_FIFO_SIZE 70 /* FIFO is 70 cells deep */
#define UNIPERIF_FIFO_FRAMES 4 /* FDMA trigger limit in frames */
/*
* Uniperipheral IP revisions
*/
enum uniperif_version {
SND_ST_UNIPERIF_VERSION_UNKNOWN,
/* SASG1 (Orly), Newman */
SND_ST_UNIPERIF_VERSION_C6AUD0_UNI_1_0,
/* SASC1, SASG2 (Orly2) */
SND_ST_UNIPERIF_VERSION_UNI_PLR_1_0,
/* SASC1, SASG2 (Orly2), TELSS, Cannes */
SND_ST_UNIPERIF_VERSION_UNI_RDR_1_0,
/* TELSS (SASC1) */
SND_ST_UNIPERIF_VERSION_TDM_PLR_1_0,
/* Cannes/Monaco */
SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0
};
enum uniperif_type {
SND_ST_UNIPERIF_PLAYER_TYPE_NONE,
SND_ST_UNIPERIF_PLAYER_TYPE_HDMI,
SND_ST_UNIPERIF_PLAYER_TYPE_PCM,
SND_ST_UNIPERIF_PLAYER_TYPE_SPDIF
};
enum uniperif_state {
UNIPERIF_STATE_STOPPED,
UNIPERIF_STATE_STARTED,
UNIPERIF_STATE_STANDBY,
UNIPERIF_STATE_UNDERFLOW,
UNIPERIF_STATE_OVERFLOW = UNIPERIF_STATE_UNDERFLOW,
UNIPERIF_STATE_XRUN
};
enum uniperif_iec958_encoding_mode {
UNIPERIF_IEC958_ENCODING_MODE_PCM,
UNIPERIF_IEC958_ENCODING_MODE_ENCODED
};
struct uniperif_info {
int id; /* instance value of the uniperipheral IP */
enum uniperif_type player_type;
int underflow_enabled; /* Underflow recovery mode */
};
struct uniperif_iec958_settings {
enum uniperif_iec958_encoding_mode encoding_mode;
struct snd_aes_iec958 iec958;
};
struct uniperif {
/* System information */
struct uniperif_info *info;
struct device *dev;
int ver; /* IP version, used by register access macros */
struct regmap_field *clk_sel;
/* capabilities */
const struct snd_pcm_hardware *hw;
/* Resources */
struct resource *mem_region;
void *base;
unsigned long fifo_phys_address;
int irq;
/* Clocks */
struct clk *clk;
int mclk;
/* Runtime data */
enum uniperif_state state;
struct snd_pcm_substream *substream;
/* Specific to IEC958 player */
struct uniperif_iec958_settings stream_settings;
/*alsa ctrl*/
struct snd_kcontrol_new *snd_ctrls;
int num_ctrls;
/* dai properties */
unsigned int daifmt;
/* DAI callbacks */
const struct snd_soc_dai_ops *dai_ops;
};
struct sti_uniperiph_dai {
int stream;
struct uniperif *uni;
struct snd_dmaengine_dai_dma_data dma_data;
};
struct sti_uniperiph_data {
struct platform_device *pdev;
struct snd_soc_dai_driver *dai;
struct sti_uniperiph_dai dai_data;
};
/* uniperiph player*/
int uni_player_init(struct platform_device *pdev,
struct uniperif *uni_player);
int uni_player_resume(struct uniperif *player);
#endif

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@ -0,0 +1,890 @@
/*
* Copyright (C) STMicroelectronics SA 2015
* Authors: Arnaud Pouliquen <arnaud.pouliquen@st.com>
* for STMicroelectronics.
* License terms: GNU General Public License (GPL), version 2
*/
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/io.h>
#include <linux/mfd/syscon.h>
#include <sound/asoundef.h>
#include <sound/soc.h>
#include "uniperif.h"
/*
* Some hardware-related definitions
*/
/* sys config registers definitions */
#define SYS_CFG_AUDIO_GLUE 0xA4
#define SYS_CFG_AUDI0_GLUE_PCM_CLKX 8
/*
* Driver specific types.
*/
#define UNIPERIF_PLAYER_TYPE_IS_HDMI(p) \
((p)->info->player_type == SND_ST_UNIPERIF_PLAYER_TYPE_HDMI)
#define UNIPERIF_PLAYER_TYPE_IS_PCM(p) \
((p)->info->player_type == SND_ST_UNIPERIF_PLAYER_TYPE_PCM)
#define UNIPERIF_PLAYER_TYPE_IS_SPDIF(p) \
((p)->info->player_type == SND_ST_UNIPERIF_PLAYER_TYPE_SPDIF)
#define UNIPERIF_PLAYER_TYPE_IS_IEC958(p) \
(UNIPERIF_PLAYER_TYPE_IS_HDMI(p) || \
UNIPERIF_PLAYER_TYPE_IS_SPDIF(p))
/*
* Note: snd_pcm_hardware is linked to DMA controller but is declared here to
* integrate DAI_CPU capability in term of rate and supported channels
*/
const struct snd_pcm_hardware uni_player_pcm_hw = {
.info = SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER |
SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_MMAP |
SNDRV_PCM_INFO_MMAP_VALID,
.formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S16_LE,
.rates = SNDRV_PCM_RATE_CONTINUOUS,
.rate_min = 8000,
.rate_max = 192000,
.channels_min = 2,
.channels_max = 8,
.periods_min = 2,
.periods_max = 48,
.period_bytes_min = 128,
.period_bytes_max = 64 * PAGE_SIZE,
.buffer_bytes_max = 256 * PAGE_SIZE
};
static inline int reset_player(struct uniperif *player)
{
int count = 10;
if (player->ver < SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0) {
while (GET_UNIPERIF_SOFT_RST_SOFT_RST(player) && count) {
udelay(5);
count--;
}
}
if (!count) {
dev_err(player->dev, "Failed to reset uniperif");
return -EIO;
}
return 0;
}
/*
* uni_player_irq_handler
* In case of error audio stream is stopped; stop action is protected via PCM
* stream lock to avoid race condition with trigger callback.
*/
static irqreturn_t uni_player_irq_handler(int irq, void *dev_id)
{
irqreturn_t ret = IRQ_NONE;
struct uniperif *player = dev_id;
unsigned int status;
unsigned int tmp;
if (player->state == UNIPERIF_STATE_STOPPED) {
/* Unexpected IRQ: do nothing */
return IRQ_NONE;
}
/* Get interrupt status & clear them immediately */
status = GET_UNIPERIF_ITS(player);
SET_UNIPERIF_ITS_BCLR(player, status);
/* Check for fifo error (underrun) */
if (unlikely(status & UNIPERIF_ITS_FIFO_ERROR_MASK(player))) {
dev_err(player->dev, "FIFO underflow error detected");
/* Interrupt is just for information when underflow recovery */
if (player->info->underflow_enabled) {
/* Update state to underflow */
player->state = UNIPERIF_STATE_UNDERFLOW;
} else {
/* Disable interrupt so doesn't continually fire */
SET_UNIPERIF_ITM_BCLR_FIFO_ERROR(player);
/* Stop the player */
snd_pcm_stream_lock(player->substream);
snd_pcm_stop(player->substream, SNDRV_PCM_STATE_XRUN);
snd_pcm_stream_unlock(player->substream);
}
ret = IRQ_HANDLED;
}
/* Check for dma error (overrun) */
if (unlikely(status & UNIPERIF_ITS_DMA_ERROR_MASK(player))) {
dev_err(player->dev, "DMA error detected");
/* Disable interrupt so doesn't continually fire */
SET_UNIPERIF_ITM_BCLR_DMA_ERROR(player);
/* Stop the player */
snd_pcm_stream_lock(player->substream);
snd_pcm_stop(player->substream, SNDRV_PCM_STATE_XRUN);
snd_pcm_stream_unlock(player->substream);
ret = IRQ_HANDLED;
}
/* Check for underflow recovery done */
if (unlikely(status & UNIPERIF_ITM_UNDERFLOW_REC_DONE_MASK(player))) {
if (!player->info->underflow_enabled) {
dev_err(player->dev, "unexpected Underflow recovering");
return -EPERM;
}
/* Read the underflow recovery duration */
tmp = GET_UNIPERIF_STATUS_1_UNDERFLOW_DURATION(player);
/* Clear the underflow recovery duration */
SET_UNIPERIF_BIT_CONTROL_CLR_UNDERFLOW_DURATION(player);
/* Update state to started */
player->state = UNIPERIF_STATE_STARTED;
ret = IRQ_HANDLED;
}
/* Check if underflow recovery failed */
if (unlikely(status &
UNIPERIF_ITM_UNDERFLOW_REC_FAILED_MASK(player))) {
dev_err(player->dev, "Underflow recovery failed");
/* Stop the player */
snd_pcm_stream_lock(player->substream);
snd_pcm_stop(player->substream, SNDRV_PCM_STATE_XRUN);
snd_pcm_stream_unlock(player->substream);
ret = IRQ_HANDLED;
}
return ret;
}
static void uni_player_set_channel_status(struct uniperif *player,
struct snd_pcm_runtime *runtime)
{
int n;
unsigned int status;
/*
* Some AVRs and TVs require the channel status to contain a correct
* sampling frequency. If no sample rate is already specified, then
* set one.
*/
if (runtime && (player->stream_settings.iec958.status[3]
== IEC958_AES3_CON_FS_NOTID)) {
switch (runtime->rate) {
case 22050:
player->stream_settings.iec958.status[3] =
IEC958_AES3_CON_FS_22050;
break;
case 44100:
player->stream_settings.iec958.status[3] =
IEC958_AES3_CON_FS_44100;
break;
case 88200:
player->stream_settings.iec958.status[3] =
IEC958_AES3_CON_FS_88200;
break;
case 176400:
player->stream_settings.iec958.status[3] =
IEC958_AES3_CON_FS_176400;
break;
case 24000:
player->stream_settings.iec958.status[3] =
IEC958_AES3_CON_FS_24000;
break;
case 48000:
player->stream_settings.iec958.status[3] =
IEC958_AES3_CON_FS_48000;
break;
case 96000:
player->stream_settings.iec958.status[3] =
IEC958_AES3_CON_FS_96000;
break;
case 192000:
player->stream_settings.iec958.status[3] =
IEC958_AES3_CON_FS_192000;
break;
case 32000:
player->stream_settings.iec958.status[3] =
IEC958_AES3_CON_FS_32000;
break;
default:
/* Mark as sampling frequency not indicated */
player->stream_settings.iec958.status[3] =
IEC958_AES3_CON_FS_NOTID;
break;
}
}
/* Audio mode:
* Use audio mode status to select PCM or encoded mode
*/
if (player->stream_settings.iec958.status[0] & IEC958_AES0_NONAUDIO)
player->stream_settings.encoding_mode =
UNIPERIF_IEC958_ENCODING_MODE_ENCODED;
else
player->stream_settings.encoding_mode =
UNIPERIF_IEC958_ENCODING_MODE_PCM;
if (player->stream_settings.encoding_mode ==
UNIPERIF_IEC958_ENCODING_MODE_PCM)
/* Clear user validity bits */
SET_UNIPERIF_USER_VALIDITY_VALIDITY_LR(player, 0);
else
/* Set user validity bits */
SET_UNIPERIF_USER_VALIDITY_VALIDITY_LR(player, 1);
/* Program the new channel status */
for (n = 0; n < 6; ++n) {
status =
player->stream_settings.iec958.status[0 + (n * 4)] & 0xf;
status |=
player->stream_settings.iec958.status[1 + (n * 4)] << 8;
status |=
player->stream_settings.iec958.status[2 + (n * 4)] << 16;
status |=
player->stream_settings.iec958.status[3 + (n * 4)] << 24;
SET_UNIPERIF_CHANNEL_STA_REGN(player, n, status);
}
/* Update the channel status */
if (player->ver < SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0)
SET_UNIPERIF_CONFIG_CHL_STS_UPDATE(player);
else
SET_UNIPERIF_BIT_CONTROL_CHL_STS_UPDATE(player);
}
static int uni_player_prepare_iec958(struct uniperif *player,
struct snd_pcm_runtime *runtime)
{
int clk_div;
clk_div = player->mclk / runtime->rate;
/* Oversampling must be multiple of 128 as iec958 frame is 32-bits */
if ((clk_div % 128) || (clk_div <= 0)) {
dev_err(player->dev, "%s: invalid clk_div %d",
__func__, clk_div);
return -EINVAL;
}
switch (runtime->format) {
case SNDRV_PCM_FORMAT_S16_LE:
/* 16/16 memory format */
SET_UNIPERIF_CONFIG_MEM_FMT_16_16(player);
/* 16-bits per sub-frame */
SET_UNIPERIF_I2S_FMT_NBIT_32(player);
/* Set 16-bit sample precision */
SET_UNIPERIF_I2S_FMT_DATA_SIZE_16(player);
break;
case SNDRV_PCM_FORMAT_S32_LE:
/* 16/0 memory format */
SET_UNIPERIF_CONFIG_MEM_FMT_16_0(player);
/* 32-bits per sub-frame */
SET_UNIPERIF_I2S_FMT_NBIT_32(player);
/* Set 24-bit sample precision */
SET_UNIPERIF_I2S_FMT_DATA_SIZE_24(player);
break;
default:
dev_err(player->dev, "format not supported");
return -EINVAL;
}
/* Set parity to be calculated by the hardware */
SET_UNIPERIF_CONFIG_PARITY_CNTR_BY_HW(player);
/* Set channel status bits to be inserted by the hardware */
SET_UNIPERIF_CONFIG_CHANNEL_STA_CNTR_BY_HW(player);
/* Set user data bits to be inserted by the hardware */
SET_UNIPERIF_CONFIG_USER_DAT_CNTR_BY_HW(player);
/* Set validity bits to be inserted by the hardware */
SET_UNIPERIF_CONFIG_VALIDITY_DAT_CNTR_BY_HW(player);
/* Set full software control to disabled */
SET_UNIPERIF_CONFIG_SPDIF_SW_CTRL_DISABLE(player);
SET_UNIPERIF_CTRL_ZERO_STUFF_HW(player);
/* Update the channel status */
uni_player_set_channel_status(player, runtime);
/* Clear the user validity user bits */
SET_UNIPERIF_USER_VALIDITY_VALIDITY_LR(player, 0);
/* Disable one-bit audio mode */
SET_UNIPERIF_CONFIG_ONE_BIT_AUD_DISABLE(player);
/* Enable consecutive frames repetition of Z preamble (not for HBRA) */
SET_UNIPERIF_CONFIG_REPEAT_CHL_STS_ENABLE(player);
/* Change to SUF0_SUBF1 and left/right channels swap! */
SET_UNIPERIF_CONFIG_SUBFRAME_SEL_SUBF1_SUBF0(player);
/* Set data output as MSB first */
SET_UNIPERIF_I2S_FMT_ORDER_MSB(player);
if (player->stream_settings.encoding_mode ==
UNIPERIF_IEC958_ENCODING_MODE_ENCODED)
SET_UNIPERIF_CTRL_EXIT_STBY_ON_EOBLOCK_ON(player);
else
SET_UNIPERIF_CTRL_EXIT_STBY_ON_EOBLOCK_OFF(player);
SET_UNIPERIF_I2S_FMT_NUM_CH(player, runtime->channels / 2);
/* Set rounding to off */
SET_UNIPERIF_CTRL_ROUNDING_OFF(player);
/* Set clock divisor */
SET_UNIPERIF_CTRL_DIVIDER(player, clk_div / 128);
/* Set the spdif latency to not wait before starting player */
SET_UNIPERIF_CTRL_SPDIF_LAT_OFF(player);
/*
* Ensure iec958 formatting is off. It will be enabled in function
* uni_player_start() at the same time as the operation
* mode is set to work around a silicon issue.
*/
if (player->ver < SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0)
SET_UNIPERIF_CTRL_SPDIF_FMT_OFF(player);
else
SET_UNIPERIF_CTRL_SPDIF_FMT_ON(player);
return 0;
}
static int uni_player_prepare_pcm(struct uniperif *player,
struct snd_pcm_runtime *runtime)
{
int output_frame_size, slot_width, clk_div;
/* Force slot width to 32 in I2S mode (HW constraint) */
if ((player->daifmt & SND_SOC_DAIFMT_FORMAT_MASK) ==
SND_SOC_DAIFMT_I2S) {
slot_width = 32;
} else {
switch (runtime->format) {
case SNDRV_PCM_FORMAT_S16_LE:
slot_width = 16;
break;
default:
slot_width = 32;
break;
}
}
output_frame_size = slot_width * runtime->channels;
clk_div = player->mclk / runtime->rate;
/*
* For 32 bits subframe clk_div must be a multiple of 128,
* for 16 bits must be a multiple of 64
*/
if ((slot_width == 32) && (clk_div % 128)) {
dev_err(player->dev, "%s: invalid clk_div", __func__);
return -EINVAL;
}
if ((slot_width == 16) && (clk_div % 64)) {
dev_err(player->dev, "%s: invalid clk_div", __func__);
return -EINVAL;
}
/*
* Number of bits per subframe (which is one channel sample)
* on output - Transfer 16 or 32 bits from FIFO
*/
switch (slot_width) {
case 32:
SET_UNIPERIF_I2S_FMT_NBIT_32(player);
SET_UNIPERIF_I2S_FMT_DATA_SIZE_32(player);
break;
case 16:
SET_UNIPERIF_I2S_FMT_NBIT_16(player);
SET_UNIPERIF_I2S_FMT_DATA_SIZE_16(player);
break;
default:
dev_err(player->dev, "subframe format not supported");
return -EINVAL;
}
/* Configure data memory format */
switch (runtime->format) {
case SNDRV_PCM_FORMAT_S16_LE:
/* One data word contains two samples */
SET_UNIPERIF_CONFIG_MEM_FMT_16_16(player);
break;
case SNDRV_PCM_FORMAT_S32_LE:
/*
* Actually "16 bits/0 bits" means "32/28/24/20/18/16 bits
* on the left than zeros (if less than 32 bytes)"... ;-)
*/
SET_UNIPERIF_CONFIG_MEM_FMT_16_0(player);
break;
default:
dev_err(player->dev, "format not supported");
return -EINVAL;
}
/* Set rounding to off */
SET_UNIPERIF_CTRL_ROUNDING_OFF(player);
/* Set clock divisor */
SET_UNIPERIF_CTRL_DIVIDER(player, clk_div / (2 * output_frame_size));
/* Number of channelsmust be even*/
if ((runtime->channels % 2) || (runtime->channels < 2) ||
(runtime->channels > 10)) {
dev_err(player->dev, "%s: invalid nb of channels", __func__);
return -EINVAL;
}
SET_UNIPERIF_I2S_FMT_NUM_CH(player, runtime->channels / 2);
/* Set 1-bit audio format to disabled */
SET_UNIPERIF_CONFIG_ONE_BIT_AUD_DISABLE(player);
SET_UNIPERIF_I2S_FMT_ORDER_MSB(player);
SET_UNIPERIF_I2S_FMT_SCLK_EDGE_FALLING(player);
/* No iec958 formatting as outputting to DAC */
SET_UNIPERIF_CTRL_SPDIF_FMT_OFF(player);
return 0;
}
static int uni_player_set_sysclk(struct snd_soc_dai *dai, int clk_id,
unsigned int freq, int dir)
{
struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai);
struct uniperif *player = priv->dai_data.uni;
if (dir == SND_SOC_CLOCK_IN)
return 0;
if (clk_id != 0)
return -EINVAL;
player->mclk = freq;
return clk_set_rate(player->clk, freq);
}
static int uni_player_prepare(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai);
struct uniperif *player = priv->dai_data.uni;
struct snd_pcm_runtime *runtime = substream->runtime;
int transfer_size, trigger_limit;
int ret;
/* The player should be stopped */
if (player->state != UNIPERIF_STATE_STOPPED) {
dev_err(player->dev, "%s: invalid player state %d", __func__,
player->state);
return -EINVAL;
}
/* Calculate transfer size (in fifo cells and bytes) for frame count */
transfer_size = runtime->channels * UNIPERIF_FIFO_FRAMES;
/* Calculate number of empty cells available before asserting DREQ */
if (player->ver < SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0) {
trigger_limit = UNIPERIF_FIFO_SIZE - transfer_size;
} else {
/*
* Since SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0
* FDMA_TRIGGER_LIMIT also controls when the state switches
* from OFF or STANDBY to AUDIO DATA.
*/
trigger_limit = transfer_size;
}
/* Trigger limit must be an even number */
if ((!trigger_limit % 2) || (trigger_limit != 1 && transfer_size % 2) ||
(trigger_limit > UNIPERIF_CONFIG_DMA_TRIG_LIMIT_MASK(player))) {
dev_err(player->dev, "invalid trigger limit %d", trigger_limit);
return -EINVAL;
}
SET_UNIPERIF_CONFIG_DMA_TRIG_LIMIT(player, trigger_limit);
/* Uniperipheral setup depends on player type */
switch (player->info->player_type) {
case SND_ST_UNIPERIF_PLAYER_TYPE_HDMI:
ret = uni_player_prepare_iec958(player, runtime);
break;
case SND_ST_UNIPERIF_PLAYER_TYPE_PCM:
ret = uni_player_prepare_pcm(player, runtime);
break;
case SND_ST_UNIPERIF_PLAYER_TYPE_SPDIF:
ret = uni_player_prepare_iec958(player, runtime);
break;
default:
dev_err(player->dev, "invalid player type");
return -EINVAL;
}
if (ret)
return ret;
switch (player->daifmt & SND_SOC_DAIFMT_INV_MASK) {
case SND_SOC_DAIFMT_NB_NF:
SET_UNIPERIF_I2S_FMT_LR_POL_LOW(player);
SET_UNIPERIF_I2S_FMT_SCLK_EDGE_RISING(player);
break;
case SND_SOC_DAIFMT_NB_IF:
SET_UNIPERIF_I2S_FMT_LR_POL_HIG(player);
SET_UNIPERIF_I2S_FMT_SCLK_EDGE_RISING(player);
break;
case SND_SOC_DAIFMT_IB_NF:
SET_UNIPERIF_I2S_FMT_LR_POL_LOW(player);
SET_UNIPERIF_I2S_FMT_SCLK_EDGE_FALLING(player);
break;
case SND_SOC_DAIFMT_IB_IF:
SET_UNIPERIF_I2S_FMT_LR_POL_HIG(player);
SET_UNIPERIF_I2S_FMT_SCLK_EDGE_FALLING(player);
}
switch (player->daifmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_I2S:
SET_UNIPERIF_I2S_FMT_ALIGN_LEFT(player);
SET_UNIPERIF_I2S_FMT_PADDING_I2S_MODE(player);
break;
case SND_SOC_DAIFMT_LEFT_J:
SET_UNIPERIF_I2S_FMT_ALIGN_LEFT(player);
SET_UNIPERIF_I2S_FMT_PADDING_SONY_MODE(player);
break;
case SND_SOC_DAIFMT_RIGHT_J:
SET_UNIPERIF_I2S_FMT_ALIGN_RIGHT(player);
SET_UNIPERIF_I2S_FMT_PADDING_SONY_MODE(player);
break;
default:
dev_err(player->dev, "format not supported");
return -EINVAL;
}
SET_UNIPERIF_I2S_FMT_NO_OF_SAMPLES_TO_READ(player, 0);
/* Reset uniperipheral player */
SET_UNIPERIF_SOFT_RST_SOFT_RST(player);
return reset_player(player);
}
static int uni_player_start(struct uniperif *player)
{
int ret;
/* The player should be stopped */
if (player->state != UNIPERIF_STATE_STOPPED) {
dev_err(player->dev, "%s: invalid player state", __func__);
return -EINVAL;
}
ret = clk_prepare_enable(player->clk);
if (ret) {
dev_err(player->dev, "%s: Failed to enable clock", __func__);
return ret;
}
/* Clear any pending interrupts */
SET_UNIPERIF_ITS_BCLR(player, GET_UNIPERIF_ITS(player));
/* Set the interrupt mask */
SET_UNIPERIF_ITM_BSET_DMA_ERROR(player);
SET_UNIPERIF_ITM_BSET_FIFO_ERROR(player);
/* Enable underflow recovery interrupts */
if (player->info->underflow_enabled) {
SET_UNIPERIF_ITM_BSET_UNDERFLOW_REC_DONE(player);
SET_UNIPERIF_ITM_BSET_UNDERFLOW_REC_FAILED(player);
}
/* Reset uniperipheral player */
SET_UNIPERIF_SOFT_RST_SOFT_RST(player);
ret = reset_player(player);
if (ret < 0)
return ret;
/*
* Does not use IEC61937 features of the uniperipheral hardware.
* Instead it performs IEC61937 in software and inserts it directly
* into the audio data stream. As such, when encoded mode is selected,
* linear pcm mode is still used, but with the differences of the
* channel status bits set for encoded mode and the validity bits set.
*/
SET_UNIPERIF_CTRL_OPERATION_PCM_DATA(player);
/*
* If iec958 formatting is required for hdmi or spdif, then it must be
* enabled after the operation mode is set. If set prior to this, it
* will not take affect and hang the player.
*/
if (player->ver < SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0)
if (UNIPERIF_PLAYER_TYPE_IS_IEC958(player))
SET_UNIPERIF_CTRL_SPDIF_FMT_ON(player);
/* Force channel status update (no update if clk disable) */
if (player->ver < SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0)
SET_UNIPERIF_CONFIG_CHL_STS_UPDATE(player);
else
SET_UNIPERIF_BIT_CONTROL_CHL_STS_UPDATE(player);
/* Update state to started */
player->state = UNIPERIF_STATE_STARTED;
return 0;
}
static int uni_player_stop(struct uniperif *player)
{
int ret;
/* The player should not be in stopped state */
if (player->state == UNIPERIF_STATE_STOPPED) {
dev_err(player->dev, "%s: invalid player state", __func__);
return -EINVAL;
}
/* Turn the player off */
SET_UNIPERIF_CTRL_OPERATION_OFF(player);
/* Soft reset the player */
SET_UNIPERIF_SOFT_RST_SOFT_RST(player);
ret = reset_player(player);
if (ret < 0)
return ret;
/* Disable interrupts */
SET_UNIPERIF_ITM_BCLR(player, GET_UNIPERIF_ITM(player));
/* Disable clock */
clk_disable_unprepare(player->clk);
/* Update state to stopped and return */
player->state = UNIPERIF_STATE_STOPPED;
return 0;
}
int uni_player_resume(struct uniperif *player)
{
int ret;
/* Select the frequency synthesizer clock */
if (player->clk_sel) {
ret = regmap_field_write(player->clk_sel, 1);
if (ret) {
dev_err(player->dev,
"%s: Failed to select freq synth clock",
__func__);
return ret;
}
}
SET_UNIPERIF_CONFIG_BACK_STALL_REQ_DISABLE(player);
SET_UNIPERIF_CTRL_ROUNDING_OFF(player);
SET_UNIPERIF_CTRL_SPDIF_LAT_OFF(player);
SET_UNIPERIF_CONFIG_IDLE_MOD_DISABLE(player);
return 0;
}
EXPORT_SYMBOL_GPL(uni_player_resume);
static int uni_player_trigger(struct snd_pcm_substream *substream,
int cmd, struct snd_soc_dai *dai)
{
struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai);
struct uniperif *player = priv->dai_data.uni;
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
return uni_player_start(player);
case SNDRV_PCM_TRIGGER_STOP:
return uni_player_stop(player);
case SNDRV_PCM_TRIGGER_RESUME:
return uni_player_resume(player);
default:
return -EINVAL;
}
}
static void uni_player_shutdown(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai);
struct uniperif *player = priv->dai_data.uni;
if (player->state != UNIPERIF_STATE_STOPPED)
/* Stop the player */
uni_player_stop(player);
}
static int uni_player_parse_dt_clk_glue(struct platform_device *pdev,
struct uniperif *player)
{
int bit_offset;
struct device_node *node = pdev->dev.of_node;
struct regmap *regmap;
bit_offset = SYS_CFG_AUDI0_GLUE_PCM_CLKX + player->info->id;
regmap = syscon_regmap_lookup_by_phandle(node, "st,syscfg");
if (regmap) {
struct reg_field regfield =
REG_FIELD(SYS_CFG_AUDIO_GLUE, bit_offset, bit_offset);
player->clk_sel = regmap_field_alloc(regmap, regfield);
} else {
dev_err(&pdev->dev, "sti-audio-clk-glue syscf not found\n");
return -EINVAL;
}
return 0;
}
static int uni_player_parse_dt(struct platform_device *pdev,
struct uniperif *player)
{
struct uniperif_info *info;
struct device *dev = &pdev->dev;
struct device_node *pnode = pdev->dev.of_node;
const char *mode;
/* Allocate memory for the info structure */
info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL);
if (!info)
return -ENOMEM;
of_property_read_u32(pnode, "version", &player->ver);
if (player->ver == SND_ST_UNIPERIF_VERSION_UNKNOWN) {
dev_err(dev, "Unknown uniperipheral version ");
return -EINVAL;
}
/* Underflow recovery is only supported on later ip revisions */
if (player->ver >= SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0)
info->underflow_enabled = 1;
of_property_read_u32(pnode, "uniperiph-id", &info->id);
/* Read the device mode property */
of_property_read_string(pnode, "mode", &mode);
if (strcasecmp(mode, "hdmi") == 0)
info->player_type = SND_ST_UNIPERIF_PLAYER_TYPE_HDMI;
else if (strcasecmp(mode, "pcm") == 0)
info->player_type = SND_ST_UNIPERIF_PLAYER_TYPE_PCM;
else if (strcasecmp(mode, "spdif") == 0)
info->player_type = SND_ST_UNIPERIF_PLAYER_TYPE_SPDIF;
else
info->player_type = SND_ST_UNIPERIF_PLAYER_TYPE_NONE;
/* Save the info structure */
player->info = info;
/* Get the PCM_CLK_SEL bit from audio-glue-ctrl SoC register */
if (uni_player_parse_dt_clk_glue(pdev, player))
return -EINVAL;
return 0;
}
const struct snd_soc_dai_ops uni_player_dai_ops = {
.shutdown = uni_player_shutdown,
.prepare = uni_player_prepare,
.trigger = uni_player_trigger,
.hw_params = sti_uniperiph_dai_hw_params,
.set_fmt = sti_uniperiph_dai_set_fmt,
.set_sysclk = uni_player_set_sysclk
};
int uni_player_init(struct platform_device *pdev,
struct uniperif *player)
{
int ret = 0;
player->dev = &pdev->dev;
player->state = UNIPERIF_STATE_STOPPED;
player->hw = &uni_player_pcm_hw;
player->dai_ops = &uni_player_dai_ops;
ret = uni_player_parse_dt(pdev, player);
if (ret < 0) {
dev_err(player->dev, "Failed to parse DeviceTree");
return ret;
}
/* Get uniperif resource */
player->clk = of_clk_get(pdev->dev.of_node, 0);
if (IS_ERR(player->clk))
ret = (int)PTR_ERR(player->clk);
/* Select the frequency synthesizer clock */
if (player->clk_sel) {
ret = regmap_field_write(player->clk_sel, 1);
if (ret) {
dev_err(player->dev,
"%s: Failed to select freq synth clock",
__func__);
return ret;
}
}
ret = devm_request_irq(&pdev->dev, player->irq,
uni_player_irq_handler, IRQF_SHARED,
dev_name(&pdev->dev), player);
if (ret < 0)
return ret;
/* Ensure that disabled by default */
SET_UNIPERIF_CONFIG_BACK_STALL_REQ_DISABLE(player);
SET_UNIPERIF_CTRL_ROUNDING_OFF(player);
SET_UNIPERIF_CTRL_SPDIF_LAT_OFF(player);
SET_UNIPERIF_CONFIG_IDLE_MOD_DISABLE(player);
if (UNIPERIF_PLAYER_TYPE_IS_IEC958(player)) {
/* Set default iec958 status bits */
/* Consumer, PCM, copyright, 2ch, mode 0 */
player->stream_settings.iec958.status[0] = 0x00;
/* Broadcast reception category */
player->stream_settings.iec958.status[1] =
IEC958_AES1_CON_GENERAL;
/* Do not take into account source or channel number */
player->stream_settings.iec958.status[2] =
IEC958_AES2_CON_SOURCE_UNSPEC;
/* Sampling frequency not indicated */
player->stream_settings.iec958.status[3] =
IEC958_AES3_CON_FS_NOTID;
/* Max sample word 24-bit, sample word length not indicated */
player->stream_settings.iec958.status[4] =
IEC958_AES4_CON_MAX_WORDLEN_24 |
IEC958_AES4_CON_WORDLEN_24_20;
}
return 0;
}
EXPORT_SYMBOL_GPL(uni_player_init);