[alsa-devel] Applied "ASoC: sti: Add CPU DAI driver for capture" to the asoc tree
Mark Brown
broonie at kernel.org
Thu Jul 16 23:01:26 CEST 2015
The patch
ASoC: sti: Add CPU DAI driver for capture
has been applied to the asoc tree at
git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git
All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.
You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.
If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.
Please add any relevant lists and maintainers to the CCs when replying
to this mail.
Thanks,
Mark
>From c3a0003aaf0dc2ffd006a3bb5abc1f5b639552a7 Mon Sep 17 00:00:00 2001
From: Arnaud Pouliquen <arnaud.pouliquen at st.com>
Date: Thu, 16 Jul 2015 11:36:03 +0200
Subject: [PATCH] ASoC: sti: Add CPU DAI driver for capture
Add code to manage Uniperipheral reader IP instances.
These DAIs are dedicated to capture and support I2S and IEC modes.
Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen at st.com>
Signed-off-by: Mark Brown <broonie at kernel.org>
---
sound/soc/sti/uniperif.h | 3 +
sound/soc/sti/uniperif_reader.c | 362 ++++++++++++++++++++++++++++++++++++++++
2 files changed, 365 insertions(+)
create mode 100644 sound/soc/sti/uniperif_reader.c
diff --git a/sound/soc/sti/uniperif.h b/sound/soc/sti/uniperif.h
index a8d9e94..f396958 100644
--- a/sound/soc/sti/uniperif.h
+++ b/sound/soc/sti/uniperif.h
@@ -1212,4 +1212,7 @@ int uni_player_init(struct platform_device *pdev,
struct uniperif *uni_player);
int uni_player_resume(struct uniperif *player);
+/* uniperiph reader */
+int uni_reader_init(struct platform_device *pdev,
+ struct uniperif *uni_reader);
#endif
diff --git a/sound/soc/sti/uniperif_reader.c b/sound/soc/sti/uniperif_reader.c
new file mode 100644
index 0000000..7d83827
--- /dev/null
+++ b/sound/soc/sti/uniperif_reader.c
@@ -0,0 +1,362 @@
+/*
+ * 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 <sound/soc.h>
+
+#include "uniperif.h"
+
+/*
+ * Note: snd_pcm_hardware is linked to DMA controller but is declared here to
+ * integrate unireader capability in term of rate and supported channels
+ */
+const struct snd_pcm_hardware uni_reader_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 = 96000,
+
+ .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_reader_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_reader_irq_handler(int irq, void *dev_id)
+{
+ irqreturn_t ret = IRQ_NONE;
+ struct uniperif *reader = dev_id;
+ unsigned int status;
+
+ if (reader->state == UNIPERIF_STATE_STOPPED) {
+ /* Unexpected IRQ: do nothing */
+ dev_warn(reader->dev, "unexpected IRQ ");
+ return IRQ_HANDLED;
+ }
+
+ /* Get interrupt status & clear them immediately */
+ status = GET_UNIPERIF_ITS(reader);
+ SET_UNIPERIF_ITS_BCLR(reader, status);
+
+ /* Check for fifo overflow error */
+ if (unlikely(status & UNIPERIF_ITS_FIFO_ERROR_MASK(reader))) {
+ dev_err(reader->dev, "FIFO error detected");
+
+ snd_pcm_stream_lock(reader->substream);
+ snd_pcm_stop(reader->substream, SNDRV_PCM_STATE_XRUN);
+ snd_pcm_stream_unlock(reader->substream);
+
+ return IRQ_HANDLED;
+ }
+
+ return ret;
+}
+
+static int uni_reader_prepare(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai);
+ struct uniperif *reader = priv->dai_data.uni;
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ int transfer_size, trigger_limit;
+ int slot_width;
+ int count = 10;
+
+ /* The reader should be stopped */
+ if (reader->state != UNIPERIF_STATE_STOPPED) {
+ dev_err(reader->dev, "%s: invalid reader state %d", __func__,
+ reader->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 (reader->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(reader))) {
+ dev_err(reader->dev, "invalid trigger limit %d", trigger_limit);
+ return -EINVAL;
+ }
+
+ SET_UNIPERIF_CONFIG_DMA_TRIG_LIMIT(reader, trigger_limit);
+
+ switch (reader->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(reader);
+ break;
+ default:
+ SET_UNIPERIF_I2S_FMT_LR_POL_LOW(reader);
+ }
+
+ /* Force slot width to 32 in I2S mode */
+ if ((reader->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;
+ }
+ }
+
+ /* Number of bits per subframe (i.e one channel sample) on input. */
+ switch (slot_width) {
+ case 32:
+ SET_UNIPERIF_I2S_FMT_NBIT_32(reader);
+ SET_UNIPERIF_I2S_FMT_DATA_SIZE_32(reader);
+ break;
+ case 16:
+ SET_UNIPERIF_I2S_FMT_NBIT_16(reader);
+ SET_UNIPERIF_I2S_FMT_DATA_SIZE_16(reader);
+ break;
+ default:
+ dev_err(reader->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(reader);
+ break;
+
+ case SNDRV_PCM_FORMAT_S32_LE:
+ /*
+ * Actually "16 bits/0 bits" means "32/28/24/20/18/16 bits
+ * on the MSB then zeros (if less than 32 bytes)"...
+ */
+ SET_UNIPERIF_CONFIG_MEM_FMT_16_0(reader);
+ break;
+
+ default:
+ dev_err(reader->dev, "format not supported");
+ return -EINVAL;
+ }
+
+ switch (reader->daifmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+ case SND_SOC_DAIFMT_I2S:
+ SET_UNIPERIF_I2S_FMT_ALIGN_LEFT(reader);
+ SET_UNIPERIF_I2S_FMT_PADDING_I2S_MODE(reader);
+ break;
+ case SND_SOC_DAIFMT_LEFT_J:
+ SET_UNIPERIF_I2S_FMT_ALIGN_LEFT(reader);
+ SET_UNIPERIF_I2S_FMT_PADDING_SONY_MODE(reader);
+ break;
+ case SND_SOC_DAIFMT_RIGHT_J:
+ SET_UNIPERIF_I2S_FMT_ALIGN_RIGHT(reader);
+ SET_UNIPERIF_I2S_FMT_PADDING_SONY_MODE(reader);
+ break;
+ default:
+ dev_err(reader->dev, "format not supported");
+ return -EINVAL;
+ }
+
+ SET_UNIPERIF_I2S_FMT_ORDER_MSB(reader);
+
+ /* Data clocking (changing) on the rising edge */
+ SET_UNIPERIF_I2S_FMT_SCLK_EDGE_RISING(reader);
+
+ /* Number of channels must be even */
+
+ if ((runtime->channels % 2) || (runtime->channels < 2) ||
+ (runtime->channels > 10)) {
+ dev_err(reader->dev, "%s: invalid nb of channels", __func__);
+ return -EINVAL;
+ }
+
+ SET_UNIPERIF_I2S_FMT_NUM_CH(reader, runtime->channels / 2);
+
+ /* Clear any pending interrupts */
+ SET_UNIPERIF_ITS_BCLR(reader, GET_UNIPERIF_ITS(reader));
+
+ SET_UNIPERIF_I2S_FMT_NO_OF_SAMPLES_TO_READ(reader, 0);
+
+ /* Set the interrupt mask */
+ SET_UNIPERIF_ITM_BSET_DMA_ERROR(reader);
+ SET_UNIPERIF_ITM_BSET_FIFO_ERROR(reader);
+ SET_UNIPERIF_ITM_BSET_MEM_BLK_READ(reader);
+
+ /* Enable underflow recovery interrupts */
+ if (reader->info->underflow_enabled) {
+ SET_UNIPERIF_ITM_BSET_UNDERFLOW_REC_DONE(reader);
+ SET_UNIPERIF_ITM_BSET_UNDERFLOW_REC_FAILED(reader);
+ }
+
+ /* Reset uniperipheral reader */
+ SET_UNIPERIF_SOFT_RST_SOFT_RST(reader);
+
+ while (GET_UNIPERIF_SOFT_RST_SOFT_RST(reader)) {
+ udelay(5);
+ count--;
+ }
+ if (!count) {
+ dev_err(reader->dev, "Failed to reset uniperif");
+ return -EIO;
+ }
+
+ return 0;
+}
+
+static int uni_reader_start(struct uniperif *reader)
+{
+ /* The reader should be stopped */
+ if (reader->state != UNIPERIF_STATE_STOPPED) {
+ dev_err(reader->dev, "%s: invalid reader state", __func__);
+ return -EINVAL;
+ }
+
+ /* Enable reader interrupts (and clear possible stalled ones) */
+ SET_UNIPERIF_ITS_BCLR_FIFO_ERROR(reader);
+ SET_UNIPERIF_ITM_BSET_FIFO_ERROR(reader);
+
+ /* Launch the reader */
+ SET_UNIPERIF_CTRL_OPERATION_PCM_DATA(reader);
+
+ /* Update state to started */
+ reader->state = UNIPERIF_STATE_STARTED;
+ return 0;
+}
+
+static int uni_reader_stop(struct uniperif *reader)
+{
+ /* The reader should not be in stopped state */
+ if (reader->state == UNIPERIF_STATE_STOPPED) {
+ dev_err(reader->dev, "%s: invalid reader state", __func__);
+ return -EINVAL;
+ }
+
+ /* Turn the reader off */
+ SET_UNIPERIF_CTRL_OPERATION_OFF(reader);
+
+ /* Disable interrupts */
+ SET_UNIPERIF_ITM_BCLR(reader, GET_UNIPERIF_ITM(reader));
+
+ /* Update state to stopped and return */
+ reader->state = UNIPERIF_STATE_STOPPED;
+
+ return 0;
+}
+
+static int uni_reader_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 *reader = priv->dai_data.uni;
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ return uni_reader_start(reader);
+ case SNDRV_PCM_TRIGGER_STOP:
+ return uni_reader_stop(reader);
+ default:
+ return -EINVAL;
+ }
+}
+
+static void uni_reader_shutdown(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai);
+ struct uniperif *reader = priv->dai_data.uni;
+
+ if (reader->state != UNIPERIF_STATE_STOPPED) {
+ /* Stop the reader */
+ uni_reader_stop(reader);
+ }
+}
+
+static int uni_reader_parse_dt(struct platform_device *pdev,
+ struct uniperif *reader)
+{
+ struct uniperif_info *info;
+ struct device_node *node = pdev->dev.of_node;
+
+ /* Allocate memory for the info structure */
+ info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
+ if (!info)
+ return -ENOMEM;
+
+ of_property_read_u32(node, "version", &reader->ver);
+
+ /* Save the info structure */
+ reader->info = info;
+
+ return 0;
+}
+
+const struct snd_soc_dai_ops uni_reader_dai_ops = {
+ .shutdown = uni_reader_shutdown,
+ .prepare = uni_reader_prepare,
+ .trigger = uni_reader_trigger,
+ .hw_params = sti_uniperiph_dai_hw_params,
+ .set_fmt = sti_uniperiph_dai_set_fmt,
+};
+
+int uni_reader_init(struct platform_device *pdev,
+ struct uniperif *reader)
+{
+ int ret = 0;
+
+ reader->dev = &pdev->dev;
+ reader->state = UNIPERIF_STATE_STOPPED;
+ reader->hw = &uni_reader_pcm_hw;
+ reader->dai_ops = &uni_reader_dai_ops;
+
+ dev_err(reader->dev, "%s: enter\n", __func__);
+ ret = uni_reader_parse_dt(pdev, reader);
+ if (ret < 0) {
+ dev_err(reader->dev, "Failed to parse DeviceTree");
+ return ret;
+ }
+
+ ret = devm_request_irq(&pdev->dev, reader->irq,
+ uni_reader_irq_handler, IRQF_SHARED,
+ dev_name(&pdev->dev), reader);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "Failed to request IRQ");
+ return -EBUSY;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(uni_reader_init);
--
2.1.4
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