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Diffstat (limited to 'sound/soc/sti/uniperif_player.c')
-rw-r--r--sound/soc/sti/uniperif_player.c1148
1 files changed, 1148 insertions, 0 deletions
diff --git a/sound/soc/sti/uniperif_player.c b/sound/soc/sti/uniperif_player.c
new file mode 100644
index 000000000..dd9013c47
--- /dev/null
+++ b/sound/soc/sti/uniperif_player.c
@@ -0,0 +1,1148 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) STMicroelectronics SA 2015
+ * Authors: Arnaud Pouliquen <arnaud.pouliquen@st.com>
+ * for STMicroelectronics.
+ */
+
+#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.
+ */
+ 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);
+ }
+
+ /* 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);
+
+ mutex_lock(&player->ctrl_lock);
+ /* Update the channel status */
+ uni_player_set_channel_status(player, runtime);
+ mutex_unlock(&player->ctrl_lock);
+
+ /* 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];
+
+ 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);
+ mutex_unlock(&player->ctrl_lock);
+
+ 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);
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-12 20:21:28 +0000