[alsa-devel] [PATCH v3 3/9] ASoC: sti: Add CPU DAI driver for playback
Arnaud Pouliquen
arnaud.pouliquen at st.com
Mon Jun 22 16:31:07 CEST 2015
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 at st.com>
---
sound/soc/sti/uniperif.h | 116 ++++++
sound/soc/sti/uniperif_player.c | 890 ++++++++++++++++++++++++++++++++++++++++
2 files changed, 1006 insertions(+)
create mode 100644 sound/soc/sti/uniperif_player.c
diff --git a/sound/soc/sti/uniperif.h b/sound/soc/sti/uniperif.h
index 043853e..a8d9e94 100644
--- a/sound/soc/sti/uniperif.h
+++ b/sound/soc/sti/uniperif.h
@@ -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
diff --git a/sound/soc/sti/uniperif_player.c b/sound/soc/sti/uniperif_player.c
new file mode 100644
index 0000000..d66d633
--- /dev/null
+++ b/sound/soc/sti/uniperif_player.c
@@ -0,0 +1,890 @@
+/*
+ * Copyright (C) STMicroelectronics SA 2015
+ * Authors: Arnaud Pouliquen <arnaud.pouliquen at 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);
--
1.9.1
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