1 files changed, 86 insertions, 0 deletions
diff --git a/sound/soc/sof/amd/acp-pcm.c b/sound/soc/sof/amd/acp-pcm.c
new file mode 100644
index 000000000..727c3a784
--- /dev/null
+++ b/sound/soc/sof/amd/acp-pcm.c
@@ -0,0 +1,86 @@
+// SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
+//
+// This file is provided under a dual BSD/GPLv2 license. When using or
+// redistributing this file, you may do so under either license.
+//
+// Copyright(c) 2021 Advanced Micro Devices, Inc.
+//
+// Authors: Ajit Kumar Pandey <AjitKumar.Pandey@amd.com>
+
+/*
+ * PCM interface for generic AMD audio ACP DSP block
+ */
+#include <sound/pcm_params.h>
+
+#include "../ops.h"
+#include "acp.h"
+#include "acp-dsp-offset.h"
+
+int acp_pcm_hw_params(struct snd_sof_dev *sdev, struct snd_pcm_substream *substream,
+		      struct snd_pcm_hw_params *params,
+		      struct snd_sof_platform_stream_params *platform_params)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct acp_dsp_stream *stream = runtime->private_data;
+	unsigned int buf_offset, index;
+	u32 size;
+	int ret;
+
+	size = runtime->dma_bytes;
+	stream->num_pages = PFN_UP(runtime->dma_bytes);
+	stream->dmab = substream->runtime->dma_buffer_p;
+
+	ret = acp_dsp_stream_config(sdev, stream);
+	if (ret < 0) {
+		dev_err(sdev->dev, "stream configuration failed\n");
+		return ret;
+	}
+
+	platform_params->use_phy_address = true;
+	platform_params->phy_addr = stream->reg_offset;
+	platform_params->stream_tag = stream->stream_tag;
+
+	/* write buffer size of stream in scratch memory */
+
+	buf_offset = sdev->debug_box.offset +
+		     offsetof(struct scratch_reg_conf, buf_size);
+	index = stream->stream_tag - 1;
+	buf_offset = buf_offset + index * 4;
+
+	snd_sof_dsp_write(sdev, ACP_DSP_BAR, ACP_SCRATCH_REG_0 + buf_offset, size);
+
+	return 0;
+}
+EXPORT_SYMBOL_NS(acp_pcm_hw_params, SND_SOC_SOF_AMD_COMMON);
+
+int acp_pcm_open(struct snd_sof_dev *sdev, struct snd_pcm_substream *substream)
+{
+	struct acp_dsp_stream *stream;
+
+	stream = acp_dsp_stream_get(sdev, 0);
+	if (!stream)
+		return -ENODEV;
+
+	substream->runtime->private_data = stream;
+	stream->substream = substream;
+
+	return 0;
+}
+EXPORT_SYMBOL_NS(acp_pcm_open, SND_SOC_SOF_AMD_COMMON);
+
+int acp_pcm_close(struct snd_sof_dev *sdev, struct snd_pcm_substream *substream)
+{
+	struct acp_dsp_stream *stream;
+
+	stream = substream->runtime->private_data;
+	if (!stream) {
+		dev_err(sdev->dev, "No open stream\n");
+		return -EINVAL;
+	}
+
+	stream->substream = NULL;
+	substream->runtime->private_data = NULL;
+
+	return acp_dsp_stream_put(sdev, stream);
+}
+EXPORT_SYMBOL_NS(acp_pcm_close, SND_SOC_SOF_AMD_COMMON);