1 files changed, 386 insertions, 0 deletions

diff --git a/sound/soc/sof/compress.c b/sound/soc/sof/compress.c
new file mode 100644
index 000000000..8e1a9ba11
--- /dev/null
+++ b/sound/soc/sof/compress.c
@@ -0,0 +1,386 @@
+// SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
+//
+// Copyright 2021 NXP
+//
+// Author: Daniel Baluta <daniel.baluta@nxp.com>
+
+#include <sound/soc.h>
+#include <sound/sof.h>
+#include <sound/compress_driver.h>
+#include "sof-audio.h"
+#include "sof-priv.h"
+#include "sof-utils.h"
+
+static void sof_set_transferred_bytes(struct sof_compr_stream *sstream,
+				      u64 host_pos, u64 buffer_size)
+{
+	u64 prev_pos;
+	unsigned int copied;
+
+	div64_u64_rem(sstream->copied_total, buffer_size, &prev_pos);
+
+	if (host_pos < prev_pos)
+		copied = (buffer_size - prev_pos) + host_pos;
+	else
+		copied = host_pos - prev_pos;
+
+	sstream->copied_total += copied;
+}
+
+static void snd_sof_compr_fragment_elapsed_work(struct work_struct *work)
+{
+	struct snd_sof_pcm_stream *sps =
+		container_of(work, struct snd_sof_pcm_stream,
+			     period_elapsed_work);
+
+	snd_compr_fragment_elapsed(sps->cstream);
+}
+
+void snd_sof_compr_init_elapsed_work(struct work_struct *work)
+{
+	INIT_WORK(work, snd_sof_compr_fragment_elapsed_work);
+}
+
+/*
+ * sof compr fragment elapse, this could be called in irq thread context
+ */
+void snd_sof_compr_fragment_elapsed(struct snd_compr_stream *cstream)
+{
+	struct snd_soc_pcm_runtime *rtd;
+	struct snd_compr_runtime *crtd;
+	struct snd_soc_component *component;
+	struct sof_compr_stream *sstream;
+	struct snd_sof_pcm *spcm;
+
+	if (!cstream)
+		return;
+
+	rtd = cstream->private_data;
+	crtd = cstream->runtime;
+	sstream = crtd->private_data;
+	component = snd_soc_rtdcom_lookup(rtd, SOF_AUDIO_PCM_DRV_NAME);
+
+	spcm = snd_sof_find_spcm_dai(component, rtd);
+	if (!spcm) {
+		dev_err(component->dev,
+			"fragment elapsed called for unknown stream!\n");
+		return;
+	}
+
+	sof_set_transferred_bytes(sstream, spcm->stream[cstream->direction].posn.host_posn,
+				  crtd->buffer_size);
+
+	/* use the same workqueue-based solution as for PCM, cf. snd_sof_pcm_elapsed */
+	schedule_work(&spcm->stream[cstream->direction].period_elapsed_work);
+}
+
+static int create_page_table(struct snd_soc_component *component,
+			     struct snd_compr_stream *cstream,
+			     unsigned char *dma_area, size_t size)
+{
+	struct snd_dma_buffer *dmab = cstream->runtime->dma_buffer_p;
+	struct snd_soc_pcm_runtime *rtd = cstream->private_data;
+	int dir = cstream->direction;
+	struct snd_sof_pcm *spcm;
+
+	spcm = snd_sof_find_spcm_dai(component, rtd);
+	if (!spcm)
+		return -EINVAL;
+
+	return snd_sof_create_page_table(component->dev, dmab,
+					 spcm->stream[dir].page_table.area, size);
+}
+
+static int sof_compr_open(struct snd_soc_component *component,
+			  struct snd_compr_stream *cstream)
+{
+	struct snd_soc_pcm_runtime *rtd = cstream->private_data;
+	struct snd_compr_runtime *crtd = cstream->runtime;
+	struct sof_compr_stream *sstream;
+	struct snd_sof_pcm *spcm;
+	int dir;
+
+	sstream = kzalloc(sizeof(*sstream), GFP_KERNEL);
+	if (!sstream)
+		return -ENOMEM;
+
+	spcm = snd_sof_find_spcm_dai(component, rtd);
+	if (!spcm) {
+		kfree(sstream);
+		return -EINVAL;
+	}
+
+	dir = cstream->direction;
+
+	if (spcm->stream[dir].cstream) {
+		kfree(sstream);
+		return -EBUSY;
+	}
+
+	spcm->stream[dir].cstream = cstream;
+	spcm->stream[dir].posn.host_posn = 0;
+	spcm->stream[dir].posn.dai_posn = 0;
+	spcm->prepared[dir] = false;
+
+	crtd->private_data = sstream;
+
+	return 0;
+}
+
+static int sof_compr_free(struct snd_soc_component *component,
+			  struct snd_compr_stream *cstream)
+{
+	struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
+	struct sof_compr_stream *sstream = cstream->runtime->private_data;
+	struct snd_soc_pcm_runtime *rtd = cstream->private_data;
+	struct sof_ipc_stream stream;
+	struct sof_ipc_reply reply;
+	struct snd_sof_pcm *spcm;
+	int ret = 0;
+
+	spcm = snd_sof_find_spcm_dai(component, rtd);
+	if (!spcm)
+		return -EINVAL;
+
+	stream.hdr.size = sizeof(stream);
+	stream.hdr.cmd = SOF_IPC_GLB_STREAM_MSG | SOF_IPC_STREAM_PCM_FREE;
+	stream.comp_id = spcm->stream[cstream->direction].comp_id;
+
+	if (spcm->prepared[cstream->direction]) {
+		ret = sof_ipc_tx_message(sdev->ipc, &stream, sizeof(stream),
+					 &reply, sizeof(reply));
+		if (!ret)
+			spcm->prepared[cstream->direction] = false;
+	}
+
+	cancel_work_sync(&spcm->stream[cstream->direction].period_elapsed_work);
+	spcm->stream[cstream->direction].cstream = NULL;
+	kfree(sstream);
+
+	return ret;
+}
+
+static int sof_compr_set_params(struct snd_soc_component *component,
+				struct snd_compr_stream *cstream, struct snd_compr_params *params)
+{
+	struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
+	struct snd_soc_pcm_runtime *rtd = cstream->private_data;
+	struct snd_compr_runtime *crtd = cstream->runtime;
+	struct sof_ipc_pcm_params_reply ipc_params_reply;
+	struct sof_ipc_fw_ready *ready = &sdev->fw_ready;
+	struct sof_ipc_fw_version *v = &ready->version;
+	struct sof_compr_stream *sstream;
+	struct sof_ipc_pcm_params *pcm;
+	struct snd_sof_pcm *spcm;
+	size_t ext_data_size;
+	int ret;
+
+	if (v->abi_version < SOF_ABI_VER(3, 22, 0)) {
+		dev_err(component->dev,
+			"Compress params not supported with FW ABI version %d:%d:%d\n",
+			SOF_ABI_VERSION_MAJOR(v->abi_version),
+			SOF_ABI_VERSION_MINOR(v->abi_version),
+			SOF_ABI_VERSION_PATCH(v->abi_version));
+		return -EINVAL;
+	}
+
+	sstream = crtd->private_data;
+
+	spcm = snd_sof_find_spcm_dai(component, rtd);
+
+	if (!spcm)
+		return -EINVAL;
+
+	ext_data_size = sizeof(params->codec);
+
+	if (sizeof(*pcm) + ext_data_size > sdev->ipc->max_payload_size)
+		return -EINVAL;
+
+	pcm = kzalloc(sizeof(*pcm) + ext_data_size, GFP_KERNEL);
+	if (!pcm)
+		return -ENOMEM;
+
+	cstream->dma_buffer.dev.type = SNDRV_DMA_TYPE_DEV_SG;
+	cstream->dma_buffer.dev.dev = sdev->dev;
+	ret = snd_compr_malloc_pages(cstream, crtd->buffer_size);
+	if (ret < 0)
+		goto out;
+
+	ret = create_page_table(component, cstream, crtd->dma_area, crtd->dma_bytes);
+	if (ret < 0)
+		goto out;
+
+	pcm->params.buffer.pages = PFN_UP(crtd->dma_bytes);
+	pcm->hdr.size = sizeof(*pcm) + ext_data_size;
+	pcm->hdr.cmd = SOF_IPC_GLB_STREAM_MSG | SOF_IPC_STREAM_PCM_PARAMS;
+
+	pcm->comp_id = spcm->stream[cstream->direction].comp_id;
+	pcm->params.hdr.size = sizeof(pcm->params) + ext_data_size;
+	pcm->params.buffer.phy_addr = spcm->stream[cstream->direction].page_table.addr;
+	pcm->params.buffer.size = crtd->dma_bytes;
+	pcm->params.direction = cstream->direction;
+	pcm->params.channels = params->codec.ch_out;
+	pcm->params.rate = params->codec.sample_rate;
+	pcm->params.buffer_fmt = SOF_IPC_BUFFER_INTERLEAVED;
+	pcm->params.frame_fmt = SOF_IPC_FRAME_S32_LE;
+	pcm->params.sample_container_bytes =
+		snd_pcm_format_physical_width(SNDRV_PCM_FORMAT_S32) >> 3;
+	pcm->params.host_period_bytes = params->buffer.fragment_size;
+	pcm->params.ext_data_length = ext_data_size;
+
+	memcpy((u8 *)pcm->params.ext_data, &params->codec, ext_data_size);
+
+	ret = sof_ipc_tx_message(sdev->ipc, pcm, sizeof(*pcm) + ext_data_size,
+				 &ipc_params_reply, sizeof(ipc_params_reply));
+	if (ret < 0) {
+		dev_err(component->dev, "error ipc failed\n");
+		goto out;
+	}
+
+	sstream->sampling_rate = params->codec.sample_rate;
+	sstream->channels = params->codec.ch_out;
+	sstream->sample_container_bytes = pcm->params.sample_container_bytes;
+
+	spcm->prepared[cstream->direction] = true;
+
+out:
+	kfree(pcm);
+
+	return ret;
+}
+
+static int sof_compr_get_params(struct snd_soc_component *component,
+				struct snd_compr_stream *cstream, struct snd_codec *params)
+{
+	/* TODO: we don't query the supported codecs for now, if the
+	 * application asks for an unsupported codec the set_params() will fail.
+	 */
+	return 0;
+}
+
+static int sof_compr_trigger(struct snd_soc_component *component,
+			     struct snd_compr_stream *cstream, int cmd)
+{
+	struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
+	struct snd_soc_pcm_runtime *rtd = cstream->private_data;
+	struct sof_ipc_stream stream;
+	struct sof_ipc_reply reply;
+	struct snd_sof_pcm *spcm;
+
+	spcm = snd_sof_find_spcm_dai(component, rtd);
+	if (!spcm)
+		return -EINVAL;
+
+	stream.hdr.size = sizeof(stream);
+	stream.hdr.cmd = SOF_IPC_GLB_STREAM_MSG;
+	stream.comp_id = spcm->stream[cstream->direction].comp_id;
+
+	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_START:
+		stream.hdr.cmd |= SOF_IPC_STREAM_TRIG_START;
+		break;
+	case SNDRV_PCM_TRIGGER_STOP:
+		stream.hdr.cmd |= SOF_IPC_STREAM_TRIG_STOP;
+		break;
+	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+		stream.hdr.cmd |= SOF_IPC_STREAM_TRIG_PAUSE;
+		break;
+	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+		stream.hdr.cmd |= SOF_IPC_STREAM_TRIG_RELEASE;
+		break;
+	default:
+		dev_err(component->dev, "error: unhandled trigger cmd %d\n", cmd);
+		break;
+	}
+
+	return sof_ipc_tx_message(sdev->ipc, &stream, sizeof(stream),
+				  &reply, sizeof(reply));
+}
+
+static int sof_compr_copy_playback(struct snd_compr_runtime *rtd,
+				   char __user *buf, size_t count)
+{
+	void *ptr;
+	unsigned int offset, n;
+	int ret;
+
+	div_u64_rem(rtd->total_bytes_available, rtd->buffer_size, &offset);
+	ptr = rtd->dma_area + offset;
+	n = rtd->buffer_size - offset;
+
+	if (count < n) {
+		ret = copy_from_user(ptr, buf, count);
+	} else {
+		ret = copy_from_user(ptr, buf, n);
+		ret += copy_from_user(rtd->dma_area, buf + n, count - n);
+	}
+
+	return count - ret;
+}
+
+static int sof_compr_copy_capture(struct snd_compr_runtime *rtd,
+				  char __user *buf, size_t count)
+{
+	void *ptr;
+	unsigned int offset, n;
+	int ret;
+
+	div_u64_rem(rtd->total_bytes_transferred, rtd->buffer_size, &offset);
+	ptr = rtd->dma_area + offset;
+	n = rtd->buffer_size - offset;
+
+	if (count < n) {
+		ret = copy_to_user(buf, ptr, count);
+	} else {
+		ret = copy_to_user(buf, ptr, n);
+		ret += copy_to_user(buf + n, rtd->dma_area, count - n);
+	}
+
+	return count - ret;
+}
+
+static int sof_compr_copy(struct snd_soc_component *component,
+			  struct snd_compr_stream *cstream,
+			  char __user *buf, size_t count)
+{
+	struct snd_compr_runtime *rtd = cstream->runtime;
+
+	if (count > rtd->buffer_size)
+		count = rtd->buffer_size;
+
+	if (cstream->direction == SND_COMPRESS_PLAYBACK)
+		return sof_compr_copy_playback(rtd, buf, count);
+	else
+		return sof_compr_copy_capture(rtd, buf, count);
+}
+
+static int sof_compr_pointer(struct snd_soc_component *component,
+			     struct snd_compr_stream *cstream,
+			     struct snd_compr_tstamp *tstamp)
+{
+	struct snd_sof_pcm *spcm;
+	struct snd_soc_pcm_runtime *rtd = cstream->private_data;
+	struct sof_compr_stream *sstream = cstream->runtime->private_data;
+
+	spcm = snd_sof_find_spcm_dai(component, rtd);
+	if (!spcm)
+		return -EINVAL;
+
+	tstamp->sampling_rate = sstream->sampling_rate;
+	tstamp->copied_total = sstream->copied_total;
+	tstamp->pcm_io_frames = div_u64(spcm->stream[cstream->direction].posn.dai_posn,
+					sstream->channels * sstream->sample_container_bytes);
+
+	return 0;
+}
+
+struct snd_compress_ops sof_compressed_ops = {
+	.open		= sof_compr_open,
+	.free		= sof_compr_free,
+	.set_params	= sof_compr_set_params,
+	.get_params	= sof_compr_get_params,
+	.trigger	= sof_compr_trigger,
+	.pointer	= sof_compr_pointer,
+	.copy		= sof_compr_copy,
+};
+EXPORT_SYMBOL(sof_compressed_ops);