[alsa-devel] [PATCH 3/7] Asoc: sti: add CPU DAI driver for playback
Arnaud Pouliquen
arnaud.pouliquen at st.com
Tue Apr 14 15:35:27 CEST 2015
Add code to manage Uniperipheral player IP instances.
These DAIs are dedicated to playback and support I2S and IEC mode.
Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen at st.com>
---
sound/soc/sti/uniperif.h | 133 ++++
sound/soc/sti/uniperif_player.c | 1367 +++++++++++++++++++++++++++++++++++++++
2 files changed, 1500 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..02ac9a8 100644
--- a/sound/soc/sti/uniperif.h
+++ b/sound/soc/sti/uniperif.h
@@ -1097,3 +1097,136 @@
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 */
+
+#define UNIPERIF_MIN_RATE 8000
+#define UNIPERIF_MAX_RATE 192000
+
+#define UNIPERIF_MIN_CHANNELS 2
+#define UNIPERIF_MAX_CHANNELS 8
+
+#define UNIPERIF_PERIODS_BYTES_MIN 128
+#define UNIPERIF_PERIODS_BYTES_MAX (64 * PAGE_SIZE)
+#define UNIPERIF_PERIODS_MIN 2
+#define UNIPERIF_PERIODS_MAX 48
+#define UNIPERIF_BUFFER_BYTES_MAX (2048 * PAGE_SIZE)
+
+/*
+ * 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 ver;
+ int uni_num; /* instance value of the uniperipheral IP */
+ enum uniperif_type player_type;
+ int underflow_enabled; /* Underflow recovery mode */
+ int standby_enabled;
+ unsigned int suspend_delay;
+};
+
+struct uniperif_iec958_settings {
+ enum uniperif_iec958_encoding_mode encoding_mode;
+ struct snd_aes_iec958 iec958;
+};
+
+struct uniperif;
+
+struct uniperif_ops {
+ int (*open)(struct uniperif *player);
+ void (*close)(struct uniperif *player);
+ int (*prepare)(struct uniperif *player,
+ struct snd_pcm_runtime *runtime);
+ int (*trigger)(struct uniperif *player, int cmd);
+};
+
+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 clk_div;
+ int clk_adj;
+ int rate;
+
+ /* Runtime data */
+ enum uniperif_state state;
+
+ struct snd_pcm_substream *substream;
+
+ /* Specific to IEC958 player */
+ struct uniperif_iec958_settings stream_settings;
+ spinlock_t lock; /* lock on resource updated by alsa controls */
+
+ /*alsa ctrl*/
+ struct snd_kcontrol_new *snd_ctrls;
+ int num_ctrls;
+
+ /* dai properties */
+ unsigned int daifmt;
+
+ /* DAI callbacks */
+ const struct uniperif_ops *ops;
+
+ /* work struct */
+ struct delayed_work delayed_work;
+};
+
+/* uniperiph player*/
+int uni_player_init(struct platform_device *pdev, struct device_node *node,
+ struct uniperif **uni_player, int idx);
+int uni_player_remove(struct platform_device *pdev);
+
+#endif
diff --git a/sound/soc/sti/uniperif_player.c b/sound/soc/sti/uniperif_player.c
new file mode 100644
index 0000000..702bcd5
--- /dev/null
+++ b/sound/soc/sti/uniperif_player.c
@@ -0,0 +1,1367 @@
+/*
+ * 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
+ */
+
+#define DEFAULT_OVERSAMPLING 128 /* make all ip's running at same rate*/
+
+#define MIN_IEC958_SAMPLE_RATE 32000
+
+/* 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))
+
+#define DUMP_REGISTER(r) \
+ snd_iprintf(buffer, "AUD_UNIPERIF_%-23s (offset 0x%04x) = " \
+ "0x%08x\n", __stringify(r), \
+ UNIPERIF_##r##_OFFSET(player), \
+ GET_UNIPERIF_##r(player))
+
+#define UNIPERIF_PLAYER_CLK_ADJ_MIN -999999
+#define UNIPERIF_PLAYER_CLK_ADJ_MAX 1000000
+#define UNIPERIF_PLAYER_CLK_ADJ_STEP 1
+
+#define MIN_AUTOSUPEND_DELAY_MS 100
+
+static int uni_player_suspend(struct uniperif *player);
+
+static struct workqueue_struct *uni_player_wq;
+
+const struct snd_pcm_hardware uni_player_pcm_hw = {
+ .info = (
+ SNDRV_PCM_INFO_INTERLEAVED |
+ SNDRV_PCM_INFO_BLOCK_TRANSFER |
+ SNDRV_PCM_INFO_PAUSE),
+ .formats = (SNDRV_PCM_FMTBIT_S32_LE |
+ SNDRV_PCM_FMTBIT_S16_LE),
+
+ .rates = SNDRV_PCM_RATE_CONTINUOUS,
+ .rate_min = UNIPERIF_MIN_RATE,
+ .rate_max = UNIPERIF_MAX_RATE,
+
+ .channels_min = UNIPERIF_MIN_CHANNELS,
+ .channels_max = UNIPERIF_MAX_CHANNELS,
+
+ .periods_min = UNIPERIF_PERIODS_MIN,
+ .periods_max = UNIPERIF_PERIODS_MAX,
+
+ .period_bytes_min = UNIPERIF_PERIODS_BYTES_MIN,
+ .period_bytes_max = UNIPERIF_PERIODS_BYTES_MAX,
+ .buffer_bytes_max = UNIPERIF_BUFFER_BYTES_MAX
+};
+
+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;
+}
+
+static inline int get_property_hdl(struct device *dev, struct device_node *np,
+ const char *prop, int idx)
+{
+ int sz = 0;
+ const __be32 *phandle;
+
+ phandle = of_get_property(np, prop, &sz);
+
+ if (!phandle) {
+ dev_err(dev, "%s: ERROR: DT-property '%s' missing or invalid!",
+ __func__, prop);
+ return -EINVAL;
+ }
+
+ if (idx >= sz) {
+ dev_err(dev, "%s: ERROR: Array-index (%u) >= array-size (%u)!",
+ __func__, idx, sz);
+ return -EINVAL;
+ }
+
+ return be32_to_cpup(phandle + idx);
+}
+
+/*
+ * Uniperipheral player implementation
+ */
+
+static void uni_player_work(struct work_struct *work)
+{
+ struct uniperif *player =
+ container_of(work, struct uniperif, delayed_work.work);
+
+ spin_lock(&player->lock);
+ if (uni_player_suspend(player))
+ dev_err(player->dev, "%s: failed to suspend player", __func__);
+ spin_unlock(&player->lock);
+}
+
+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;
+
+ /* Get interrupt status & clear them immediately */
+ preempt_disable();
+ status = GET_UNIPERIF_ITS(player);
+ SET_UNIPERIF_ITS_BCLR(player, status);
+ preempt_enable();
+
+ if ((player->state == UNIPERIF_STATE_STANDBY) ||
+ (player->state == UNIPERIF_STATE_STOPPED)) {
+ /* unexpected IRQ: do nothing */
+ dev_warn(player->dev, "unexpected IRQ: status flag: %#x",
+ status);
+ return IRQ_HANDLED;
+ };
+
+ snd_pcm_stream_lock(player->substream);
+ /* Check for fifo error (under run) */
+ 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_stop(player->substream, SNDRV_PCM_STATE_XRUN);
+ }
+
+ ret = IRQ_HANDLED;
+ }
+
+ /* Check for dma error (over run) */
+ 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_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->info->underflow_enabled) {
+ dev_err(player->dev, "unexpected Underflow recovering");
+ snd_pcm_stream_unlock(player->substream);
+ 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;
+ }
+
+ if (unlikely(status &
+ UNIPERIF_ITS_MEM_BLK_READ_MASK(player))) {
+ ret = IRQ_HANDLED;
+ }
+
+ /* Checkf or 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_stop(player->substream, SNDRV_PCM_STATE_XRUN);
+
+ ret = IRQ_HANDLED;
+ }
+
+ /* error on unhandled interrupt */
+ if (ret != IRQ_HANDLED)
+ dev_err(player->dev, "IRQ status : %#x", status);
+
+ snd_pcm_stream_unlock(player->substream);
+ return ret;
+}
+
+int uni_player_clk_set_rate(struct uniperif *player, unsigned long rate)
+{
+ int rate_adjusted, rate_achieved, delta;
+ 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;
+
+ if (clk_set_rate(player->clk, rate_adjusted) < 0) {
+ dev_err(player->dev, "Failed to clk set rate %d !\n",
+ rate_adjusted);
+ return -EINVAL;
+ }
+
+ rate_achieved = clk_get_rate(player->clk);
+ if (!rate_achieved)
+ 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.
+ */
+ spin_lock(&player->lock);
+ 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;
+ case 768000:
+ player->stream_settings.iec958.status[3] =
+ IEC958_AES3_CON_FS_768000;
+ 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);
+ }
+ spin_unlock(&player->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)
+{
+ if (!runtime) {
+ dev_err(player->dev, "%s: invalid pointer(s)", __func__);
+ return -EINVAL;
+ }
+
+ /* Oversampling must be multiple of 128 as iec958 frame is 32-bits */
+ if ((player->clk_div % 128) ||
+ (player->clk_div <= 0)) {
+ dev_err(player->dev, "%s: invalid clk_div %d",
+ __func__, player->clk_div);
+ return -EINVAL;
+ }
+
+ /* No sample rates below 32kHz are supported for iec958 */
+ if (runtime->rate < MIN_IEC958_SAMPLE_RATE) {
+ dev_err(player->dev, "Invalid rate (%d)", runtime->rate);
+ 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 lr clock polarity and i2s mode using platform configuration */
+ /* Set data output on rising edge */
+ SET_UNIPERIF_I2S_FMT_SCLK_EDGE_RISING(player);
+
+ /* Set data aligned to left with respect to left-right clock polarity */
+ SET_UNIPERIF_I2S_FMT_ALIGN_LEFT(player);
+
+ /* Set data output as MSB first */
+ SET_UNIPERIF_I2S_FMT_ORDER_MSB(player);
+
+ /* Set the number of channels (maximum supported by spdif is 2) */
+ if (UNIPERIF_PLAYER_TYPE_IS_SPDIF(player) &&
+ (runtime->channels != 2)) {
+ dev_err(player->dev, "invalid nb of channels");
+ return -EINVAL;
+ }
+
+ 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,
+ 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;
+
+ if (!runtime) {
+ dev_err(player->dev, "%s: invalid pointer(s)", __func__);
+ return -EINVAL;
+ }
+
+ /* 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;
+
+ if (player->clk_div <= 0) {
+ dev_err(player->dev, "%s: invalid clk_div", __func__);
+ return -EINVAL;
+ }
+
+ /* For 32 bits subframe clk_div must be a multiple of 128,
+ * for 16 bits - of 64 */
+ if ((slot_width == 32) && (player->clk_div % 128)) {
+ dev_err(player->dev, "%s: invalid clk_div", __func__);
+ return -EINVAL;
+ }
+
+ if ((slot_width == 16) && (player->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,
+ player->clk_div / (2 * output_frame_size));
+
+ /* Number of channels... */
+
+ 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;
+}
+
+/*
+ * 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 uniperif *player = snd_kcontrol_chip(kcontrol);
+ struct snd_aes_iec958 *iec958 = &player->stream_settings.iec958;
+
+ spin_lock(&player->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];
+ spin_unlock(&player->lock);
+ return 0;
+}
+
+static int uni_player_ctl_iec958_put(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct uniperif *player = snd_kcontrol_chip(kcontrol);
+ struct snd_aes_iec958 *iec958 = &player->stream_settings.iec958;
+
+ spin_lock(&player->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_unlock(&player->lock);
+
+ uni_player_set_channel_status(player, NULL);
+
+ 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 = UNIPERIF_PLAYER_CLK_ADJ_STEP;
+
+ return 0;
+}
+
+static int snd_sti_clk_adjustment_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct uniperif *player = snd_kcontrol_chip(kcontrol);
+
+ spin_lock(&player->lock);
+ ucontrol->value.integer.value[0] = player->clk_adj;
+ spin_unlock(&player->lock);
+
+ return 0;
+}
+
+static int snd_sti_clk_adjustment_put(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct uniperif *player = snd_kcontrol_chip(kcontrol);
+ 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;
+
+ spin_lock(&player->lock);
+ player->clk_adj = ucontrol->value.integer.value[0];
+
+ if (player->rate)
+ ret = uni_player_clk_set_rate(player,
+ player->rate * player->clk_div);
+ spin_unlock(&player->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_open(struct uniperif *player)
+{
+ /* cancel pending delayed work (suspend) */
+ if (!cancel_delayed_work(&player->delayed_work))
+ flush_workqueue(uni_player_wq);
+
+ spin_lock(&player->lock);
+ player->rate = 0;
+ player->clk_adj = 0;
+ spin_unlock(&player->lock);
+
+ return 0;
+}
+
+static int uni_player_prepare(struct uniperif *player,
+ struct snd_pcm_runtime *runtime)
+{
+ int transfer_size, trigger_limit;
+ int ret;
+
+ /* The player should be stopped or in standby */
+ if ((player->state != UNIPERIF_STATE_STOPPED) &&
+ (player->state != UNIPERIF_STATE_STANDBY)) {
+ 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 is depend 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_IB_IF:
+ case SND_SOC_DAIFMT_NB_IF:
+ SET_UNIPERIF_I2S_FMT_LR_POL_HIG(player);
+ break;
+ default:
+ SET_UNIPERIF_I2S_FMT_LR_POL_LOW(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 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);
+ }
+
+ /* Set clock rate */
+ spin_lock(&player->lock);
+ ret = uni_player_clk_set_rate(player,
+ runtime->rate * player->clk_div);
+ if (ret) {
+ dev_err(player->dev, "Failed to set clock rate");
+ spin_unlock(&player->lock);
+ return ret;
+ }
+
+ player->rate = runtime->rate;
+ spin_unlock(&player->lock);
+
+ if (player->state == UNIPERIF_STATE_STANDBY) {
+ /* We are moving from standby to started
+ *Synchronise transition out of standby
+ */
+ if ((UNIPERIF_PLAYER_TYPE_IS_IEC958(player)) &&
+ (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);
+ return 0;
+ }
+
+ 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 ot in standby */
+ if ((player->state != UNIPERIF_STATE_STOPPED) &&
+ (player->state != UNIPERIF_STATE_STANDBY)) {
+ dev_err(player->dev, "%s: invalid player state", __func__);
+ return -EINVAL;
+ }
+
+ /* pinctrl: switch pinstate to default */
+ ret = pinctrl_pm_select_default_state(player->dev);
+ if (ret) {
+ dev_err(player->dev,
+ "%s: failed to select default pinctrl state",
+ __func__);
+ return ret;
+ }
+
+ /* Check if we are moving from standby state to started */
+ if (player->state == UNIPERIF_STATE_STANDBY) {
+ /* Set the player to audio/pcm data mode */
+ SET_UNIPERIF_CTRL_OPERATION_AUDIO_DATA(player);
+
+ /* Clear any pending interrupts */
+ SET_UNIPERIF_ITS_BCLR(player, GET_UNIPERIF_ITS(player));
+
+ /* Enable player interrupts */
+ enable_irq(player->irq);
+
+ /* Update state to started and return */
+ player->state = UNIPERIF_STATE_STARTED;
+ return 0;
+ }
+
+ 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));
+
+ /* Enable player interrupts */
+ enable_irq(player->irq);
+
+ /* 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;
+
+ if (player->state != UNIPERIF_STATE_STANDBY) {
+ /* Disable interrupts */
+ SET_UNIPERIF_ITM_BCLR(player, GET_UNIPERIF_ITM(player));
+ disable_irq_nosync(player->irq);
+ }
+
+ /* Disable clock */
+ clk_disable_unprepare(player->clk);
+
+ /* Update state to stopped and return */
+ player->state = UNIPERIF_STATE_STOPPED;
+
+ /* pinctrl: switch pinstate to sleep */
+ ret = pinctrl_pm_select_sleep_state(player->dev);
+ if (ret) {
+ dev_err(player->dev,
+ "%s: failed to select sleep pinctrl state",
+ __func__);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int uni_player_standby(struct uniperif *player)
+{
+ /* Check if we should enable standby mode */
+ if ((player->state == UNIPERIF_STATE_STARTED) &&
+ (player->info->standby_enabled == 1)) {
+ /* Disable interrupts */
+ SET_UNIPERIF_ITM_BCLR(player, GET_UNIPERIF_ITM(player));
+ disable_irq_nosync(player->irq);
+
+ /* Set standby mode */
+ SET_UNIPERIF_CTRL_OPERATION_STANDBY(player);
+
+ /* Update state to standby and return */
+ player->state = UNIPERIF_STATE_STANDBY;
+ return 0;
+ }
+
+ return uni_player_stop(player);
+}
+
+static int uni_player_suspend(struct uniperif *player)
+{
+ /* The player should be in stopped or standby state */
+ if ((player->state != UNIPERIF_STATE_STOPPED) &&
+ (player->state != UNIPERIF_STATE_STANDBY)) {
+ dev_err(player->dev, "%s: invalid player state( %d)",
+ __func__, (int)player->state);
+ return -EBUSY;
+ }
+ if (player->state == UNIPERIF_STATE_STANDBY)
+ return uni_player_stop(player);
+
+ return 0;
+}
+
+static 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;
+ }
+ }
+
+ /* cancel pending delayed work (suspend) */
+ if (!cancel_delayed_work(&player->delayed_work))
+ flush_workqueue(uni_player_wq);
+
+ 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;
+}
+
+static int uni_player_trigger(struct uniperif *player, int cmd)
+{
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ return uni_player_start(player);
+ case SNDRV_PCM_TRIGGER_STOP:
+ return uni_player_standby(player);
+ case SNDRV_PCM_TRIGGER_SUSPEND:
+ return uni_player_suspend(player);
+ case SNDRV_PCM_TRIGGER_RESUME:
+ return uni_player_resume(player);
+ default:
+ return -EINVAL;
+ }
+}
+
+static void uni_player_close(struct uniperif *player)
+{
+ if (player->state == UNIPERIF_STATE_STANDBY) {
+ /* Keep uni player in standby and trigger delayed suspend */
+ if (player->info->suspend_delay)
+ queue_delayed_work(uni_player_wq,
+ &player->delayed_work,
+ msecs_to_jiffies(player->info->suspend_delay));
+ return;
+ }
+
+ if (player->state != UNIPERIF_STATE_STOPPED) {
+ /* Stop the player */
+ uni_player_stop(player);
+ }
+}
+
+/*
+ * Platform driver routines
+ */
+
+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->uni_num;
+
+ 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 device_node *pnode,
+ struct uniperif *player)
+{
+ struct uniperif_info *info;
+ struct device *dev = &pdev->dev;
+ const char *mode;
+
+ /* Allocate memory for the info structure */
+ info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL);
+ if (!info)
+ return -ENOMEM;
+
+ if (!pnode) {
+ dev_err(dev, "%s: invalid pnode", __func__);
+ return -EINVAL;
+ }
+
+ of_property_read_u32(pnode, "version", &info->ver);
+
+ of_property_read_u32(pnode, "uniperiph-id", &info->uni_num);
+
+ /* 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;
+
+ /* Read the device features properties */
+ of_property_read_u32(pnode, "underflow", &info->underflow_enabled);
+ of_property_read_u32(pnode, "standby", &info->standby_enabled);
+
+ /* 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;
+
+ of_property_read_u32(pnode, "auto-suspend-delay",
+ &info->suspend_delay);
+ if (info->suspend_delay)
+ if (info->suspend_delay < MIN_AUTOSUPEND_DELAY_MS) {
+ info->suspend_delay = MIN_AUTOSUPEND_DELAY_MS;
+ dev_info(dev,
+ "%s: auto-suspend-delay set to min: %d ms",
+ __func__, info->suspend_delay);
+ }
+
+ return 0;
+}
+
+const struct uniperif_ops uni_player_ops = {
+ .open = uni_player_open,
+ .close = uni_player_close,
+ .prepare = uni_player_prepare,
+ .trigger = uni_player_trigger
+};
+
+int uni_player_init(struct platform_device *pdev, struct device_node *node,
+ struct uniperif **uni_player, int idx)
+{
+ struct uniperif *player;
+ int ret = 0;
+
+ player = devm_kzalloc(&pdev->dev, sizeof(*player), GFP_KERNEL);
+
+ if (!player)
+ return -ENOMEM;
+
+ player->dev = &pdev->dev;
+ player->state = UNIPERIF_STATE_STOPPED;
+ player->hw = &uni_player_pcm_hw;
+ player->ops = &uni_player_ops;
+
+ ret = uni_player_parse_dt(pdev, node, 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, idx);
+
+ if (IS_ERR(player->clk)) {
+ ret = (int)PTR_ERR(player->clk);
+ dev_err(player->dev, "%s: ERROR: clk_get failed (%d)!\n",
+ __func__, ret);
+ return -EINVAL;
+ }
+
+ /* 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;
+ }
+ }
+
+ if (player->info->ver == SND_ST_UNIPERIF_VERSION_UNKNOWN) {
+ dev_err(player->dev, "Unknown uniperipheral version ");
+ return -EINVAL;
+ }
+ player->ver = player->info->ver;
+
+ /* Check for underflow recovery being enabled */
+ if (player->info->underflow_enabled)
+ /* Underflow recovery is only supported on later ip revisions */
+ if (player->ver < SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0) {
+ dev_err(player->dev,
+ "underflow recovery not supported");
+ player->info->underflow_enabled = 0;
+ }
+
+ /* Get resources */
+
+ player->mem_region = platform_get_resource(pdev, IORESOURCE_MEM, idx);
+
+ if (!player->mem_region) {
+ dev_err(&pdev->dev, "Failed to get memory resource");
+ return -ENODEV;
+ }
+
+ player->base = devm_ioremap_resource(&pdev->dev,
+ player->mem_region);
+
+ if (!player->base) {
+ dev_err(&pdev->dev, "Failed to ioremap memory region");
+ return -ENXIO;
+ }
+
+ player->fifo_phys_address = player->mem_region->start +
+ UNIPERIF_FIFO_DATA_OFFSET(player);
+
+ player->irq = platform_get_irq(pdev, idx);
+
+ if (player->irq < 0) {
+ dev_err(&pdev->dev, "Failed to get IRQ resource");
+ return -ENXIO;
+ }
+
+ ret = devm_request_irq(&pdev->dev, player->irq,
+ uni_player_irq_handler, IRQF_SHARED,
+ dev_name(&pdev->dev), player);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "Failed to request IRQ");
+ return -EBUSY;
+ }
+
+ /* request_irq() enables the interrupt immediately; as it is
+ * lethal in concurrent audio environment, we want to have
+ * it disabled for most of the time...
+ */
+ disable_irq(player->irq);
+
+ player->clk_div = DEFAULT_OVERSAMPLING;
+
+ *uni_player = player;
+
+ spin_lock_init(&player->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_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;
+
+ 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];
+ }
+
+ uni_player_wq = create_workqueue("uni_player_workqueue");
+ if (!uni_player_wq)
+ return -ENOMEM;
+
+ INIT_DELAYED_WORK(&player->delayed_work, uni_player_work);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(uni_player_init);
+
+int uni_player_remove(struct platform_device *pdev)
+{
+ struct uniperif *player = platform_get_drvdata(pdev);
+
+ if (player->clk)
+ clk_put(player->clk);
+
+ if (uni_player_wq)
+ destroy_workqueue(uni_player_wq);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(uni_player_remove);
--
1.9.1
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