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linux/sound/soc/sti/uniperif_player.c

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/*
* 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/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
/*
* Driver specific types.
*/
#define UNIPERIF_PLAYER_CLK_ADJ_MIN -999999
#define UNIPERIF_PLAYER_CLK_ADJ_MAX 1000000
#define UNIPERIF_PLAYER_I2S_OUT 1 /* player id connected to I2S/TDM TX bus */
/*
* 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
*/
static 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
};
/*
* 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;
spin_lock(&player->irq_lock);
if (!player->substream)
goto irq_spin_unlock;
snd_pcm_stream_lock(player->substream);
if (player->state == UNIPERIF_STATE_STOPPED)
goto stream_unlock;
/* 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\n");
/* Interrupt is just for information when underflow recovery */
if (player->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_stop(player->substream, SNDRV_PCM_STATE_XRUN);
}
ret = IRQ_HANDLED;
}
/* Check for dma error (overrun) */
if (unlikely(status & UNIPERIF_ITS_DMA_ERROR_MASK(player))) {
dev_err(player->dev, "DMA error detected\n");
/* Disable interrupt so doesn't continually fire */
SET_UNIPERIF_ITM_BCLR_DMA_ERROR(player);
/* Stop the player */
snd_pcm_stop(player->substream, SNDRV_PCM_STATE_XRUN);
ret = IRQ_HANDLED;
}
/* Check for underflow recovery done */
if (unlikely(status & UNIPERIF_ITM_UNDERFLOW_REC_DONE_MASK(player))) {
if (!player->underflow_enabled) {
dev_err(player->dev,
"unexpected Underflow recovering\n");
ret = -EPERM;
goto stream_unlock;
}
/* Read the underflow recovery duration */
tmp = GET_UNIPERIF_STATUS_1_UNDERFLOW_DURATION(player);
dev_dbg(player->dev, "Underflow recovered (%d LR clocks max)\n",
tmp);
/* 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\n");
/* Stop the player */
snd_pcm_stop(player->substream, SNDRV_PCM_STATE_XRUN);
ret = IRQ_HANDLED;
}
stream_unlock:
snd_pcm_stream_unlock(player->substream);
irq_spin_unlock:
spin_unlock(&player->irq_lock);
return ret;
}
static int uni_player_clk_set_rate(struct uniperif *player, unsigned long rate)
{
int rate_adjusted, rate_achieved, delta, ret;
int adjustment = player->clk_adj;
/*
* a
* F = f + --------- * f = f + d
* 1000000
*
* a
* d = --------- * f
* 1000000
*
* where:
* f - nominal rate
* a - adjustment in ppm (parts per milion)
* F - rate to be set in synthesizer
* d - delta (difference) between f and F
*/
if (adjustment < 0) {
/* div64_64 operates on unsigned values... */
delta = -1;
adjustment = -adjustment;
} else {
delta = 1;
}
/* 500000 ppm is 0.5, which is used to round up values */
delta *= (int)div64_u64((uint64_t)rate *
(uint64_t)adjustment + 500000, 1000000);
rate_adjusted = rate + delta;
/* Adjusted rate should never be == 0 */
if (!rate_adjusted)
return -EINVAL;
ret = clk_set_rate(player->clk, rate_adjusted);
if (ret < 0)
return ret;
rate_achieved = clk_get_rate(player->clk);
if (!rate_achieved)
/* If value is 0 means that clock or parent not valid */
return -EINVAL;
/*
* Using ALSA's adjustment control, we can modify the rate to be up
* to twice as much as requested, but no more
*/
delta = rate_achieved - rate;
if (delta < 0) {
/* div64_64 operates on unsigned values... */
delta = -delta;
adjustment = -1;
} else {
adjustment = 1;
}
/* Frequency/2 is added to round up result */
adjustment *= (int)div64_u64((uint64_t)delta * 1000000 + rate / 2,
rate);
player->clk_adj = adjustment;
return 0;
}
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.
*/
mutex_lock(&player->ctrl_lock);
if (runtime) {
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);
}
mutex_unlock(&player->ctrl_lock);
/* 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\n",
__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\n");
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
slot_width = snd_pcm_format_width(runtime->format);
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\n", __func__);
return -EINVAL;
}
if ((slot_width == 16) && (clk_div % 64)) {
dev_err(player->dev, "%s: invalid clk_div\n", __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\n");
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\n");
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\n", __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);
/* No iec958 formatting as outputting to DAC */
SET_UNIPERIF_CTRL_SPDIF_FMT_OFF(player);
return 0;
}
static int uni_player_prepare_tdm(struct uniperif *player,
struct snd_pcm_runtime *runtime)
{
int tdm_frame_size; /* unip tdm frame size in bytes */
int user_frame_size; /* user tdm frame size in bytes */
/* default unip TDM_WORD_POS_X_Y */
unsigned int word_pos[4] = {
0x04060002, 0x0C0E080A, 0x14161012, 0x1C1E181A};
int freq, ret;
tdm_frame_size =
sti_uniperiph_get_unip_tdm_frame_size(player);
user_frame_size =
sti_uniperiph_get_user_frame_size(runtime);
/* fix 16/0 format */
SET_UNIPERIF_CONFIG_MEM_FMT_16_0(player);
SET_UNIPERIF_I2S_FMT_DATA_SIZE_32(player);
/* number of words inserted on the TDM line */
SET_UNIPERIF_I2S_FMT_NUM_CH(player, user_frame_size / 4 / 2);
SET_UNIPERIF_I2S_FMT_ORDER_MSB(player);
SET_UNIPERIF_I2S_FMT_ALIGN_LEFT(player);
/* Enable the tdm functionality */
SET_UNIPERIF_TDM_ENABLE_TDM_ENABLE(player);
/* number of 8 bits timeslots avail in unip tdm frame */
SET_UNIPERIF_TDM_FS_REF_DIV_NUM_TIMESLOT(player, tdm_frame_size);
/* set the timeslot allocation for words in FIFO */
sti_uniperiph_get_tdm_word_pos(player, word_pos);
SET_UNIPERIF_TDM_WORD_POS(player, 1_2, word_pos[WORD_1_2]);
SET_UNIPERIF_TDM_WORD_POS(player, 3_4, word_pos[WORD_3_4]);
SET_UNIPERIF_TDM_WORD_POS(player, 5_6, word_pos[WORD_5_6]);
SET_UNIPERIF_TDM_WORD_POS(player, 7_8, word_pos[WORD_7_8]);
/* set unip clk rate (not done vai set_sysclk ops) */
freq = runtime->rate * tdm_frame_size * 8;
mutex_lock(&player->ctrl_lock);
ret = uni_player_clk_set_rate(player, freq);
if (!ret)
player->mclk = freq;
mutex_unlock(&player->ctrl_lock);
return 0;
}
/*
* ALSA uniperipheral iec958 controls
*/
static int uni_player_ctl_iec958_info(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo)
{
uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
uinfo->count = 1;
return 0;
}
static int uni_player_ctl_iec958_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol);
struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai);
struct uniperif *player = priv->dai_data.uni;
struct snd_aes_iec958 *iec958 = &player->stream_settings.iec958;
mutex_lock(&player->ctrl_lock);
ucontrol->value.iec958.status[0] = iec958->status[0];
ucontrol->value.iec958.status[1] = iec958->status[1];
ucontrol->value.iec958.status[2] = iec958->status[2];
ucontrol->value.iec958.status[3] = iec958->status[3];
mutex_unlock(&player->ctrl_lock);
return 0;
}
static int uni_player_ctl_iec958_put(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol);
struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai);
struct uniperif *player = priv->dai_data.uni;
struct snd_aes_iec958 *iec958 = &player->stream_settings.iec958;
unsigned long flags;
mutex_lock(&player->ctrl_lock);
iec958->status[0] = ucontrol->value.iec958.status[0];
iec958->status[1] = ucontrol->value.iec958.status[1];
iec958->status[2] = ucontrol->value.iec958.status[2];
iec958->status[3] = ucontrol->value.iec958.status[3];
mutex_unlock(&player->ctrl_lock);
spin_lock_irqsave(&player->irq_lock, flags);
if (player->substream && player->substream->runtime)
uni_player_set_channel_status(player,
player->substream->runtime);
else
uni_player_set_channel_status(player, NULL);
spin_unlock_irqrestore(&player->irq_lock, flags);
return 0;
}
static struct snd_kcontrol_new uni_player_iec958_ctl = {
.iface = SNDRV_CTL_ELEM_IFACE_PCM,
.name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, DEFAULT),
.info = uni_player_ctl_iec958_info,
.get = uni_player_ctl_iec958_get,
.put = uni_player_ctl_iec958_put,
};
/*
* uniperif rate adjustement control
*/
static int snd_sti_clk_adjustment_info(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo)
{
uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
uinfo->count = 1;
uinfo->value.integer.min = UNIPERIF_PLAYER_CLK_ADJ_MIN;
uinfo->value.integer.max = UNIPERIF_PLAYER_CLK_ADJ_MAX;
uinfo->value.integer.step = 1;
return 0;
}
static int snd_sti_clk_adjustment_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol);
struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai);
struct uniperif *player = priv->dai_data.uni;
mutex_lock(&player->ctrl_lock);
ucontrol->value.integer.value[0] = player->clk_adj;
mutex_unlock(&player->ctrl_lock);
return 0;
}
static int snd_sti_clk_adjustment_put(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol);
struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai);
struct uniperif *player = priv->dai_data.uni;
int ret = 0;
if ((ucontrol->value.integer.value[0] < UNIPERIF_PLAYER_CLK_ADJ_MIN) ||
(ucontrol->value.integer.value[0] > UNIPERIF_PLAYER_CLK_ADJ_MAX))
return -EINVAL;
mutex_lock(&player->ctrl_lock);
player->clk_adj = ucontrol->value.integer.value[0];
if (player->mclk)
ret = uni_player_clk_set_rate(player, player->mclk);
mutex_unlock(&player->ctrl_lock);
return ret;
}
static struct snd_kcontrol_new uni_player_clk_adj_ctl = {
.iface = SNDRV_CTL_ELEM_IFACE_PCM,
.name = "PCM Playback Oversampling Freq. Adjustment",
.info = snd_sti_clk_adjustment_info,
.get = snd_sti_clk_adjustment_get,
.put = snd_sti_clk_adjustment_put,
};
static struct snd_kcontrol_new *snd_sti_pcm_ctl[] = {
&uni_player_clk_adj_ctl,
};
static struct snd_kcontrol_new *snd_sti_iec_ctl[] = {
&uni_player_iec958_ctl,
&uni_player_clk_adj_ctl,
};
static int uni_player_startup(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;
unsigned long flags;
int ret;
spin_lock_irqsave(&player->irq_lock, flags);
player->substream = substream;
spin_unlock_irqrestore(&player->irq_lock, flags);
player->clk_adj = 0;
if (!UNIPERIF_TYPE_IS_TDM(player))
return 0;
/* refine hw constraint in tdm mode */
ret = snd_pcm_hw_rule_add(substream->runtime, 0,
SNDRV_PCM_HW_PARAM_CHANNELS,
sti_uniperiph_fix_tdm_chan,
player, SNDRV_PCM_HW_PARAM_CHANNELS,
-1);
if (ret < 0)
return ret;
return snd_pcm_hw_rule_add(substream->runtime, 0,
SNDRV_PCM_HW_PARAM_FORMAT,
sti_uniperiph_fix_tdm_format,
player, SNDRV_PCM_HW_PARAM_FORMAT,
-1);
}
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;
int ret;
if (UNIPERIF_TYPE_IS_TDM(player) || (dir == SND_SOC_CLOCK_IN))
return 0;
if (clk_id != 0)
return -EINVAL;
mutex_lock(&player->ctrl_lock);
ret = uni_player_clk_set_rate(player, freq);
if (!ret)
player->mclk = freq;
mutex_unlock(&player->ctrl_lock);
return ret;
}
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\n", __func__,
player->state);
return -EINVAL;
}
/* Calculate transfer size (in fifo cells and bytes) for frame count */
if (player->type == SND_ST_UNIPERIF_TYPE_TDM) {
/* transfer size = user frame size (in 32 bits FIFO cell) */
transfer_size =
sti_uniperiph_get_user_frame_size(runtime) / 4;
} else {
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\n",
trigger_limit);
return -EINVAL;
}
SET_UNIPERIF_CONFIG_DMA_TRIG_LIMIT(player, trigger_limit);
/* Uniperipheral setup depends on player type */
switch (player->type) {
case SND_ST_UNIPERIF_TYPE_HDMI:
ret = uni_player_prepare_iec958(player, runtime);
break;
case SND_ST_UNIPERIF_TYPE_PCM:
ret = uni_player_prepare_pcm(player, runtime);
break;
case SND_ST_UNIPERIF_TYPE_SPDIF:
ret = uni_player_prepare_iec958(player, runtime);
break;
case SND_ST_UNIPERIF_TYPE_TDM:
ret = uni_player_prepare_tdm(player, runtime);
break;
default:
dev_err(player->dev, "invalid player type\n");
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);
break;
}
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\n");
return -EINVAL;
}
SET_UNIPERIF_I2S_FMT_NO_OF_SAMPLES_TO_READ(player, 0);
return sti_uniperiph_reset(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\n", __func__);
return -EINVAL;
}
ret = clk_prepare_enable(player->clk);
if (ret) {
dev_err(player->dev, "%s: Failed to enable clock\n", __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->underflow_enabled) {
SET_UNIPERIF_ITM_BSET_UNDERFLOW_REC_DONE(player);
SET_UNIPERIF_ITM_BSET_UNDERFLOW_REC_FAILED(player);
}
ret = sti_uniperiph_reset(player);
if (ret < 0) {
clk_disable_unprepare(player->clk);
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_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\n", __func__);
return -EINVAL;
}
/* Turn the player off */
SET_UNIPERIF_CTRL_OPERATION_OFF(player);
ret = sti_uniperiph_reset(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\n",
__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;
unsigned long flags;
spin_lock_irqsave(&player->irq_lock, flags);
if (player->state != UNIPERIF_STATE_STOPPED)
/* Stop the player */
uni_player_stop(player);
player->substream = NULL;
spin_unlock_irqrestore(&player->irq_lock, flags);
}
static int uni_player_parse_dt_audio_glue(struct platform_device *pdev,
struct uniperif *player)
{
struct device_node *node = pdev->dev.of_node;
struct regmap *regmap;
struct reg_field regfield[2] = {
/* PCM_CLK_SEL */
REG_FIELD(SYS_CFG_AUDIO_GLUE,
8 + player->id,
8 + player->id),
/* PCMP_VALID_SEL */
REG_FIELD(SYS_CFG_AUDIO_GLUE, 0, 1)
};
regmap = syscon_regmap_lookup_by_phandle(node, "st,syscfg");
if (IS_ERR(regmap)) {
dev_err(&pdev->dev, "sti-audio-clk-glue syscf not found\n");
return PTR_ERR(regmap);
}
player->clk_sel = regmap_field_alloc(regmap, regfield[0]);
player->valid_sel = regmap_field_alloc(regmap, regfield[1]);
return 0;
}
static const struct snd_soc_dai_ops uni_player_dai_ops = {
.startup = uni_player_startup,
.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,
.set_tdm_slot = sti_uniperiph_set_tdm_slot
};
int uni_player_init(struct platform_device *pdev,
struct uniperif *player)
{
int ret = 0;
player->dev = &pdev->dev;
player->state = UNIPERIF_STATE_STOPPED;
player->dai_ops = &uni_player_dai_ops;
/* Get PCM_CLK_SEL & PCMP_VALID_SEL from audio-glue-ctrl SoC reg */
ret = uni_player_parse_dt_audio_glue(pdev, player);
if (ret < 0) {
dev_err(player->dev, "Failed to parse DeviceTree\n");
return ret;
}
/* Underflow recovery is only supported on later ip revisions */
if (player->ver >= SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0)
player->underflow_enabled = 1;
if (UNIPERIF_TYPE_IS_TDM(player))
player->hw = &uni_tdm_hw;
else
player->hw = &uni_player_pcm_hw;
/* Get uniperif resource */
player->clk = of_clk_get(pdev->dev.of_node, 0);
if (IS_ERR(player->clk)) {
dev_err(player->dev, "Failed to get clock\n");
return 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\n",
__func__);
return ret;
}
}
/* connect to I2S/TDM TX bus */
if (player->valid_sel &&
(player->id == UNIPERIF_PLAYER_I2S_OUT)) {
ret = regmap_field_write(player->valid_sel, player->id);
if (ret) {
dev_err(player->dev,
"%s: unable to connect to tdm bus\n", __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) {
dev_err(player->dev, "unable to request IRQ %d\n", player->irq);
return ret;
}
mutex_init(&player->ctrl_lock);
spin_lock_init(&player->irq_lock);
/* 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_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;
player->num_ctrls = ARRAY_SIZE(snd_sti_iec_ctl);
player->snd_ctrls = snd_sti_iec_ctl[0];
} else {
player->num_ctrls = ARRAY_SIZE(snd_sti_pcm_ctl);
player->snd_ctrls = snd_sti_pcm_ctl[0];
}
return 0;
}
EXPORT_SYMBOL_GPL(uni_player_init);
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