1 files changed, 735 insertions, 0 deletions

diff --git a/sound/soc/fsl/fsl_qmc_audio.c b/sound/soc/fsl/fsl_qmc_audio.c
new file mode 100644
index 000000000000..7cbb8e4758cc
--- /dev/null
+++ b/sound/soc/fsl/fsl_qmc_audio.c
@@ -0,0 +1,735 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * ALSA SoC using the QUICC Multichannel Controller (QMC)
+ *
+ * Copyright 2022 CS GROUP France
+ *
+ * Author: Herve Codina <herve.codina@bootlin.com>
+ */
+
+#include <linux/dma-mapping.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <soc/fsl/qe/qmc.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+
+struct qmc_dai {
+	char *name;
+	int id;
+	struct device *dev;
+	struct qmc_chan *qmc_chan;
+	unsigned int nb_tx_ts;
+	unsigned int nb_rx_ts;
+};
+
+struct qmc_audio {
+	struct device *dev;
+	unsigned int num_dais;
+	struct qmc_dai *dais;
+	struct snd_soc_dai_driver *dai_drivers;
+};
+
+struct qmc_dai_prtd {
+	struct qmc_dai *qmc_dai;
+	dma_addr_t dma_buffer_start;
+	dma_addr_t period_ptr_submitted;
+	dma_addr_t period_ptr_ended;
+	dma_addr_t dma_buffer_end;
+	size_t period_size;
+	struct snd_pcm_substream *substream;
+};
+
+static int qmc_audio_pcm_construct(struct snd_soc_component *component,
+				   struct snd_soc_pcm_runtime *rtd)
+{
+	struct snd_card *card = rtd->card->snd_card;
+	int ret;
+
+	ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));
+	if (ret)
+		return ret;
+
+	snd_pcm_set_managed_buffer_all(rtd->pcm, SNDRV_DMA_TYPE_DEV, card->dev,
+				       64*1024, 64*1024);
+	return 0;
+}
+
+static int qmc_audio_pcm_hw_params(struct snd_soc_component *component,
+				   struct snd_pcm_substream *substream,
+				   struct snd_pcm_hw_params *params)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct qmc_dai_prtd *prtd = substream->runtime->private_data;
+
+	prtd->dma_buffer_start = runtime->dma_addr;
+	prtd->dma_buffer_end = runtime->dma_addr + params_buffer_bytes(params);
+	prtd->period_size = params_period_bytes(params);
+	prtd->period_ptr_submitted = prtd->dma_buffer_start;
+	prtd->period_ptr_ended = prtd->dma_buffer_start;
+	prtd->substream = substream;
+
+	return 0;
+}
+
+static void qmc_audio_pcm_write_complete(void *context)
+{
+	struct qmc_dai_prtd *prtd = context;
+	int ret;
+
+	prtd->period_ptr_ended += prtd->period_size;
+	if (prtd->period_ptr_ended >= prtd->dma_buffer_end)
+		prtd->period_ptr_ended = prtd->dma_buffer_start;
+
+	prtd->period_ptr_submitted += prtd->period_size;
+	if (prtd->period_ptr_submitted >= prtd->dma_buffer_end)
+		prtd->period_ptr_submitted = prtd->dma_buffer_start;
+
+	ret = qmc_chan_write_submit(prtd->qmc_dai->qmc_chan,
+		prtd->period_ptr_submitted, prtd->period_size,
+		qmc_audio_pcm_write_complete, prtd);
+	if (ret) {
+		dev_err(prtd->qmc_dai->dev, "write_submit failed %d\n",
+			ret);
+	}
+
+	snd_pcm_period_elapsed(prtd->substream);
+}
+
+static void qmc_audio_pcm_read_complete(void *context, size_t length)
+{
+	struct qmc_dai_prtd *prtd = context;
+	int ret;
+
+	if (length != prtd->period_size) {
+		dev_err(prtd->qmc_dai->dev, "read complete length = %zu, exp %zu\n",
+			length, prtd->period_size);
+	}
+
+	prtd->period_ptr_ended += prtd->period_size;
+	if (prtd->period_ptr_ended >= prtd->dma_buffer_end)
+		prtd->period_ptr_ended = prtd->dma_buffer_start;
+
+	prtd->period_ptr_submitted += prtd->period_size;
+	if (prtd->period_ptr_submitted >= prtd->dma_buffer_end)
+		prtd->period_ptr_submitted = prtd->dma_buffer_start;
+
+	ret = qmc_chan_read_submit(prtd->qmc_dai->qmc_chan,
+		prtd->period_ptr_submitted, prtd->period_size,
+		qmc_audio_pcm_read_complete, prtd);
+	if (ret) {
+		dev_err(prtd->qmc_dai->dev, "read_submit failed %d\n",
+			ret);
+	}
+
+	snd_pcm_period_elapsed(prtd->substream);
+}
+
+static int qmc_audio_pcm_trigger(struct snd_soc_component *component,
+				 struct snd_pcm_substream *substream, int cmd)
+{
+	struct qmc_dai_prtd *prtd = substream->runtime->private_data;
+	int ret;
+
+	if (!prtd->qmc_dai) {
+		dev_err(component->dev, "qmc_dai is not set\n");
+		return -EINVAL;
+	}
+
+	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_START:
+		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+			/* Submit first chunk ... */
+			ret = qmc_chan_write_submit(prtd->qmc_dai->qmc_chan,
+				prtd->period_ptr_submitted, prtd->period_size,
+				qmc_audio_pcm_write_complete, prtd);
+			if (ret) {
+				dev_err(component->dev, "write_submit failed %d\n",
+					ret);
+				return ret;
+			}
+
+			/* ... prepare next one ... */
+			prtd->period_ptr_submitted += prtd->period_size;
+			if (prtd->period_ptr_submitted >= prtd->dma_buffer_end)
+				prtd->period_ptr_submitted = prtd->dma_buffer_start;
+
+			/* ... and send it */
+			ret = qmc_chan_write_submit(prtd->qmc_dai->qmc_chan,
+				prtd->period_ptr_submitted, prtd->period_size,
+				qmc_audio_pcm_write_complete, prtd);
+			if (ret) {
+				dev_err(component->dev, "write_submit failed %d\n",
+					ret);
+				return ret;
+			}
+		} else {
+			/* Submit first chunk ... */
+			ret = qmc_chan_read_submit(prtd->qmc_dai->qmc_chan,
+				prtd->period_ptr_submitted, prtd->period_size,
+				qmc_audio_pcm_read_complete, prtd);
+			if (ret) {
+				dev_err(component->dev, "read_submit failed %d\n",
+					ret);
+				return ret;
+			}
+
+			/* ... prepare next one ... */
+			prtd->period_ptr_submitted += prtd->period_size;
+			if (prtd->period_ptr_submitted >= prtd->dma_buffer_end)
+				prtd->period_ptr_submitted = prtd->dma_buffer_start;
+
+			/* ... and send it */
+			ret = qmc_chan_read_submit(prtd->qmc_dai->qmc_chan,
+				prtd->period_ptr_submitted, prtd->period_size,
+				qmc_audio_pcm_read_complete, prtd);
+			if (ret) {
+				dev_err(component->dev, "write_submit failed %d\n",
+					ret);
+				return ret;
+			}
+		}
+		break;
+
+	case SNDRV_PCM_TRIGGER_RESUME:
+	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+		break;
+
+	case SNDRV_PCM_TRIGGER_STOP:
+	case SNDRV_PCM_TRIGGER_SUSPEND:
+	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+		break;
+
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static snd_pcm_uframes_t qmc_audio_pcm_pointer(struct snd_soc_component *component,
+					       struct snd_pcm_substream *substream)
+{
+	struct qmc_dai_prtd *prtd = substream->runtime->private_data;
+
+	return bytes_to_frames(substream->runtime,
+			       prtd->period_ptr_ended - prtd->dma_buffer_start);
+}
+
+static int qmc_audio_of_xlate_dai_name(struct snd_soc_component *component,
+					const struct of_phandle_args *args,
+					const char **dai_name)
+{
+	struct qmc_audio *qmc_audio = dev_get_drvdata(component->dev);
+	struct snd_soc_dai_driver *dai_driver;
+	int id = args->args[0];
+	int i;
+
+	for (i = 0; i  < qmc_audio->num_dais; i++) {
+		dai_driver = qmc_audio->dai_drivers + i;
+		if (dai_driver->id == id) {
+			*dai_name = dai_driver->name;
+			return 0;
+		}
+	}
+
+	return -EINVAL;
+}
+
+static const struct snd_pcm_hardware qmc_audio_pcm_hardware = {
+	.info			= SNDRV_PCM_INFO_MMAP |
+				  SNDRV_PCM_INFO_MMAP_VALID |
+				  SNDRV_PCM_INFO_INTERLEAVED |
+				  SNDRV_PCM_INFO_PAUSE,
+	.period_bytes_min	= 32,
+	.period_bytes_max	= 64*1024,
+	.periods_min		= 2,
+	.periods_max		= 2*1024,
+	.buffer_bytes_max	= 64*1024,
+};
+
+static int qmc_audio_pcm_open(struct snd_soc_component *component,
+			      struct snd_pcm_substream *substream)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct qmc_dai_prtd *prtd;
+	int ret;
+
+	snd_soc_set_runtime_hwparams(substream, &qmc_audio_pcm_hardware);
+
+	/* ensure that buffer size is a multiple of period size */
+	ret = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
+	if (ret < 0)
+		return ret;
+
+	prtd = kzalloc(sizeof(*prtd), GFP_KERNEL);
+	if (prtd == NULL)
+		return -ENOMEM;
+
+	runtime->private_data = prtd;
+
+	return 0;
+}
+
+static int qmc_audio_pcm_close(struct snd_soc_component *component,
+			       struct snd_pcm_substream *substream)
+{
+	struct qmc_dai_prtd *prtd = substream->runtime->private_data;
+
+	kfree(prtd);
+	return 0;
+}
+
+static const struct snd_soc_component_driver qmc_audio_soc_platform = {
+	.open			= qmc_audio_pcm_open,
+	.close			= qmc_audio_pcm_close,
+	.hw_params		= qmc_audio_pcm_hw_params,
+	.trigger		= qmc_audio_pcm_trigger,
+	.pointer		= qmc_audio_pcm_pointer,
+	.pcm_construct		= qmc_audio_pcm_construct,
+	.of_xlate_dai_name	= qmc_audio_of_xlate_dai_name,
+};
+
+static unsigned int qmc_dai_get_index(struct snd_soc_dai *dai)
+{
+	struct qmc_audio *qmc_audio = snd_soc_dai_get_drvdata(dai);
+
+	return dai->driver - qmc_audio->dai_drivers;
+}
+
+static struct qmc_dai *qmc_dai_get_data(struct snd_soc_dai *dai)
+{
+	struct qmc_audio *qmc_audio = snd_soc_dai_get_drvdata(dai);
+	unsigned int index;
+
+	index = qmc_dai_get_index(dai);
+	if (index > qmc_audio->num_dais)
+		return NULL;
+
+	return qmc_audio->dais + index;
+}
+
+/*
+ * The constraints for format/channel is to match with the number of 8bit
+ * time-slots available.
+ */
+static int qmc_dai_hw_rule_channels_by_format(struct qmc_dai *qmc_dai,
+					      struct snd_pcm_hw_params *params,
+					      unsigned int nb_ts)
+{
+	struct snd_interval *c = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
+	snd_pcm_format_t format = params_format(params);
+	struct snd_interval ch = {0};
+
+	switch (snd_pcm_format_physical_width(format)) {
+	case 8:
+		ch.max = nb_ts;
+		break;
+	case 16:
+		ch.max = nb_ts/2;
+		break;
+	case 32:
+		ch.max = nb_ts/4;
+		break;
+	case 64:
+		ch.max = nb_ts/8;
+		break;
+	default:
+		dev_err(qmc_dai->dev, "format physical width %u not supported\n",
+			snd_pcm_format_physical_width(format));
+		return -EINVAL;
+	}
+
+	ch.min = ch.max ? 1 : 0;
+
+	return snd_interval_refine(c, &ch);
+}
+
+static int qmc_dai_hw_rule_playback_channels_by_format(struct snd_pcm_hw_params *params,
+						       struct snd_pcm_hw_rule *rule)
+{
+	struct qmc_dai *qmc_dai = rule->private;
+
+	return qmc_dai_hw_rule_channels_by_format(qmc_dai, params, qmc_dai->nb_tx_ts);
+}
+
+static int qmc_dai_hw_rule_capture_channels_by_format(
+			struct snd_pcm_hw_params *params,
+			struct snd_pcm_hw_rule *rule)
+{
+	struct qmc_dai *qmc_dai = rule->private;
+
+	return qmc_dai_hw_rule_channels_by_format(qmc_dai, params, qmc_dai->nb_rx_ts);
+}
+
+static int qmc_dai_hw_rule_format_by_channels(struct qmc_dai *qmc_dai,
+					      struct snd_pcm_hw_params *params,
+					      unsigned int nb_ts)
+{
+	struct snd_mask *f_old = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
+	unsigned int channels = params_channels(params);
+	unsigned int slot_width;
+	struct snd_mask f_new;
+	unsigned int i;
+
+	if (!channels || channels > nb_ts) {
+		dev_err(qmc_dai->dev, "channels %u not supported\n",
+			nb_ts);
+		return -EINVAL;
+	}
+
+	slot_width = (nb_ts / channels) * 8;
+
+	snd_mask_none(&f_new);
+	for (i = 0; i <= SNDRV_PCM_FORMAT_LAST; i++) {
+		if (snd_mask_test(f_old, i)) {
+			if (snd_pcm_format_physical_width(i) <= slot_width)
+				snd_mask_set(&f_new, i);
+		}
+	}
+
+	return snd_mask_refine(f_old, &f_new);
+}
+
+static int qmc_dai_hw_rule_playback_format_by_channels(
+			struct snd_pcm_hw_params *params,
+			struct snd_pcm_hw_rule *rule)
+{
+	struct qmc_dai *qmc_dai = rule->private;
+
+	return qmc_dai_hw_rule_format_by_channels(qmc_dai, params, qmc_dai->nb_tx_ts);
+}
+
+static int qmc_dai_hw_rule_capture_format_by_channels(
+			struct snd_pcm_hw_params *params,
+			struct snd_pcm_hw_rule *rule)
+{
+	struct qmc_dai *qmc_dai = rule->private;
+
+	return qmc_dai_hw_rule_format_by_channels(qmc_dai, params, qmc_dai->nb_rx_ts);
+}
+
+static int qmc_dai_startup(struct snd_pcm_substream *substream,
+			     struct snd_soc_dai *dai)
+{
+	struct qmc_dai_prtd *prtd = substream->runtime->private_data;
+	snd_pcm_hw_rule_func_t hw_rule_channels_by_format;
+	snd_pcm_hw_rule_func_t hw_rule_format_by_channels;
+	struct qmc_dai *qmc_dai;
+	unsigned int frame_bits;
+	int ret;
+
+	qmc_dai = qmc_dai_get_data(dai);
+	if (!qmc_dai) {
+		dev_err(dai->dev, "Invalid dai\n");
+		return -EINVAL;
+	}
+
+	prtd->qmc_dai = qmc_dai;
+
+	if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
+		hw_rule_channels_by_format = qmc_dai_hw_rule_capture_channels_by_format;
+		hw_rule_format_by_channels = qmc_dai_hw_rule_capture_format_by_channels;
+		frame_bits = qmc_dai->nb_rx_ts * 8;
+	} else {
+		hw_rule_channels_by_format = qmc_dai_hw_rule_playback_channels_by_format;
+		hw_rule_format_by_channels = qmc_dai_hw_rule_playback_format_by_channels;
+		frame_bits = qmc_dai->nb_tx_ts * 8;
+	}
+
+	ret = snd_pcm_hw_rule_add(substream->runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
+				  hw_rule_channels_by_format, qmc_dai,
+				  SNDRV_PCM_HW_PARAM_FORMAT, -1);
+	if (ret) {
+		dev_err(dai->dev, "Failed to add channels rule (%d)\n", ret);
+		return ret;
+	}
+
+	ret = snd_pcm_hw_rule_add(substream->runtime, 0,  SNDRV_PCM_HW_PARAM_FORMAT,
+				  hw_rule_format_by_channels, qmc_dai,
+				  SNDRV_PCM_HW_PARAM_CHANNELS, -1);
+	if (ret) {
+		dev_err(dai->dev, "Failed to add format rule (%d)\n", ret);
+		return ret;
+	}
+
+	ret = snd_pcm_hw_constraint_single(substream->runtime,
+					   SNDRV_PCM_HW_PARAM_FRAME_BITS,
+					   frame_bits);
+	if (ret < 0) {
+		dev_err(dai->dev, "Failed to add frame_bits constraint (%d)\n", ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+static int qmc_dai_hw_params(struct snd_pcm_substream *substream,
+			     struct snd_pcm_hw_params *params,
+			     struct snd_soc_dai *dai)
+{
+	struct qmc_chan_param chan_param = {0};
+	struct qmc_dai *qmc_dai;
+	int ret;
+
+	qmc_dai = qmc_dai_get_data(dai);
+	if (!qmc_dai) {
+		dev_err(dai->dev, "Invalid dai\n");
+		return -EINVAL;
+	}
+
+	if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
+		chan_param.mode = QMC_TRANSPARENT;
+		chan_param.transp.max_rx_buf_size = params_period_bytes(params);
+		ret = qmc_chan_set_param(qmc_dai->qmc_chan, &chan_param);
+		if (ret) {
+			dev_err(dai->dev, "set param failed %d\n",
+				ret);
+			return ret;
+		}
+	}
+
+	return 0;
+}
+
+static int qmc_dai_trigger(struct snd_pcm_substream *substream, int cmd,
+			   struct snd_soc_dai *dai)
+{
+	struct qmc_dai *qmc_dai;
+	int direction;
+	int ret;
+
+	qmc_dai = qmc_dai_get_data(dai);
+	if (!qmc_dai) {
+		dev_err(dai->dev, "Invalid dai\n");
+		return -EINVAL;
+	}
+
+	direction = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
+		    QMC_CHAN_WRITE : QMC_CHAN_READ;
+
+	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_START:
+	case SNDRV_PCM_TRIGGER_RESUME:
+	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+		ret = qmc_chan_start(qmc_dai->qmc_chan, direction);
+		if (ret)
+			return ret;
+		break;
+
+	case SNDRV_PCM_TRIGGER_STOP:
+		ret = qmc_chan_stop(qmc_dai->qmc_chan, direction);
+		if (ret)
+			return ret;
+		ret = qmc_chan_reset(qmc_dai->qmc_chan, direction);
+		if (ret)
+			return ret;
+		break;
+
+	case SNDRV_PCM_TRIGGER_SUSPEND:
+	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+		ret = qmc_chan_stop(qmc_dai->qmc_chan, direction);
+		if (ret)
+			return ret;
+		break;
+
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static const struct snd_soc_dai_ops qmc_dai_ops = {
+	.startup	= qmc_dai_startup,
+	.trigger	= qmc_dai_trigger,
+	.hw_params	= qmc_dai_hw_params,
+};
+
+static u64 qmc_audio_formats(u8 nb_ts)
+{
+	u64 formats;
+	unsigned int chan_width;
+	unsigned int format_width;
+	int i;
+
+	if (!nb_ts)
+		return 0;
+
+	formats = 0;
+	chan_width = nb_ts * 8;
+	for (i = 0; i <= SNDRV_PCM_FORMAT_LAST; i++) {
+		/*
+		 * Support format other than little-endian (ie big-endian or
+		 * without endianness such as 8bit formats)
+		 */
+		if (snd_pcm_format_little_endian(i) == 1)
+			continue;
+
+		/* Support physical width multiple of 8bit */
+		format_width = snd_pcm_format_physical_width(i);
+		if (format_width == 0 || format_width % 8)
+			continue;
+
+		/*
+		 * And support physical width that can fit N times in the
+		 * channel
+		 */
+		if (format_width > chan_width || chan_width % format_width)
+			continue;
+
+		formats |= (1ULL << i);
+	}
+	return formats;
+}
+
+static int qmc_audio_dai_parse(struct qmc_audio *qmc_audio, struct device_node *np,
+	struct qmc_dai *qmc_dai, struct snd_soc_dai_driver *qmc_soc_dai_driver)
+{
+	struct qmc_chan_info info;
+	u32 val;
+	int ret;
+
+	qmc_dai->dev = qmc_audio->dev;
+
+	ret = of_property_read_u32(np, "reg", &val);
+	if (ret) {
+		dev_err(qmc_audio->dev, "%pOF: failed to read reg\n", np);
+		return ret;
+	}
+	qmc_dai->id = val;
+
+	qmc_dai->name = devm_kasprintf(qmc_audio->dev, GFP_KERNEL, "%s.%d",
+				       np->parent->name, qmc_dai->id);
+
+	qmc_dai->qmc_chan = devm_qmc_chan_get_byphandle(qmc_audio->dev, np,
+							"fsl,qmc-chan");
+	if (IS_ERR(qmc_dai->qmc_chan)) {
+		ret = PTR_ERR(qmc_dai->qmc_chan);
+		return dev_err_probe(qmc_audio->dev, ret,
+				     "dai %d get QMC channel failed\n", qmc_dai->id);
+	}
+
+	qmc_soc_dai_driver->id = qmc_dai->id;
+	qmc_soc_dai_driver->name = qmc_dai->name;
+
+	ret = qmc_chan_get_info(qmc_dai->qmc_chan, &info);
+	if (ret) {
+		dev_err(qmc_audio->dev, "dai %d get QMC channel info failed %d\n",
+			qmc_dai->id, ret);
+		return ret;
+	}
+	dev_info(qmc_audio->dev, "dai %d QMC channel mode %d, nb_tx_ts %u, nb_rx_ts %u\n",
+		 qmc_dai->id, info.mode, info.nb_tx_ts, info.nb_rx_ts);
+
+	if (info.mode != QMC_TRANSPARENT) {
+		dev_err(qmc_audio->dev, "dai %d QMC chan mode %d is not QMC_TRANSPARENT\n",
+			qmc_dai->id, info.mode);
+		return -EINVAL;
+	}
+	qmc_dai->nb_tx_ts = info.nb_tx_ts;
+	qmc_dai->nb_rx_ts = info.nb_rx_ts;
+
+	qmc_soc_dai_driver->playback.channels_min = 0;
+	qmc_soc_dai_driver->playback.channels_max = 0;
+	if (qmc_dai->nb_tx_ts) {
+		qmc_soc_dai_driver->playback.channels_min = 1;
+		qmc_soc_dai_driver->playback.channels_max = qmc_dai->nb_tx_ts;
+	}
+	qmc_soc_dai_driver->playback.formats = qmc_audio_formats(qmc_dai->nb_tx_ts);
+
+	qmc_soc_dai_driver->capture.channels_min = 0;
+	qmc_soc_dai_driver->capture.channels_max = 0;
+	if (qmc_dai->nb_rx_ts) {
+		qmc_soc_dai_driver->capture.channels_min = 1;
+		qmc_soc_dai_driver->capture.channels_max = qmc_dai->nb_rx_ts;
+	}
+	qmc_soc_dai_driver->capture.formats = qmc_audio_formats(qmc_dai->nb_rx_ts);
+
+	qmc_soc_dai_driver->playback.rates = snd_pcm_rate_to_rate_bit(info.tx_fs_rate);
+	qmc_soc_dai_driver->playback.rate_min = info.tx_fs_rate;
+	qmc_soc_dai_driver->playback.rate_max = info.tx_fs_rate;
+	qmc_soc_dai_driver->capture.rates = snd_pcm_rate_to_rate_bit(info.rx_fs_rate);
+	qmc_soc_dai_driver->capture.rate_min = info.rx_fs_rate;
+	qmc_soc_dai_driver->capture.rate_max = info.rx_fs_rate;
+
+	qmc_soc_dai_driver->ops = &qmc_dai_ops;
+
+	return 0;
+}
+
+static int qmc_audio_probe(struct platform_device *pdev)
+{
+	struct device_node *np = pdev->dev.of_node;
+	struct qmc_audio *qmc_audio;
+	struct device_node *child;
+	unsigned int i;
+	int ret;
+
+	qmc_audio = devm_kzalloc(&pdev->dev, sizeof(*qmc_audio), GFP_KERNEL);
+	if (!qmc_audio)
+		return -ENOMEM;
+
+	qmc_audio->dev = &pdev->dev;
+
+	qmc_audio->num_dais = of_get_available_child_count(np);
+	if (qmc_audio->num_dais) {
+		qmc_audio->dais = devm_kcalloc(&pdev->dev, qmc_audio->num_dais,
+					       sizeof(*qmc_audio->dais),
+					       GFP_KERNEL);
+		if (!qmc_audio->dais)
+			return -ENOMEM;
+
+		qmc_audio->dai_drivers = devm_kcalloc(&pdev->dev, qmc_audio->num_dais,
+						      sizeof(*qmc_audio->dai_drivers),
+						      GFP_KERNEL);
+		if (!qmc_audio->dai_drivers)
+			return -ENOMEM;
+	}
+
+	i = 0;
+	for_each_available_child_of_node(np, child) {
+		ret = qmc_audio_dai_parse(qmc_audio, child,
+					  qmc_audio->dais + i,
+					  qmc_audio->dai_drivers + i);
+		if (ret) {
+			of_node_put(child);
+			return ret;
+		}
+		i++;
+	}
+
+
+	platform_set_drvdata(pdev, qmc_audio);
+
+	ret = devm_snd_soc_register_component(qmc_audio->dev,
+					      &qmc_audio_soc_platform,
+					      qmc_audio->dai_drivers,
+					      qmc_audio->num_dais);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+static const struct of_device_id qmc_audio_id_table[] = {
+	{ .compatible = "fsl,qmc-audio" },
+	{} /* sentinel */
+};
+MODULE_DEVICE_TABLE(of, qmc_audio_id_table);
+
+static struct platform_driver qmc_audio_driver = {
+	.driver = {
+		.name = "fsl-qmc-audio",
+		.of_match_table = of_match_ptr(qmc_audio_id_table),
+	},
+	.probe = qmc_audio_probe,
+};
+module_platform_driver(qmc_audio_driver);
+
+MODULE_AUTHOR("Herve Codina <herve.codina@bootlin.com>");
+MODULE_DESCRIPTION("CPM/QE QMC audio driver");
+MODULE_LICENSE("GPL");