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-rw-r--r--sound/soc/sof/intel/hda-trace.c95
1 files changed, 95 insertions, 0 deletions
diff --git a/sound/soc/sof/intel/hda-trace.c b/sound/soc/sof/intel/hda-trace.c
new file mode 100644
index 0000000000..cbb9bd7770
--- /dev/null
+++ b/sound/soc/sof/intel/hda-trace.c
@@ -0,0 +1,95 @@
+// 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) 2018 Intel Corporation. All rights reserved.
+//
+// Authors: Liam Girdwood <liam.r.girdwood@linux.intel.com>
+// Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
+// Rander Wang <rander.wang@intel.com>
+// Keyon Jie <yang.jie@linux.intel.com>
+//
+
+/*
+ * Hardware interface for generic Intel audio DSP HDA IP
+ */
+
+#include <sound/hdaudio_ext.h>
+#include "../ops.h"
+#include "hda.h"
+
+static int hda_dsp_trace_prepare(struct snd_sof_dev *sdev, struct snd_dma_buffer *dmab)
+{
+ struct sof_intel_hda_dev *hda = sdev->pdata->hw_pdata;
+ struct hdac_ext_stream *hext_stream = hda->dtrace_stream;
+ struct hdac_stream *hstream = &hext_stream->hstream;
+ int ret;
+
+ hstream->period_bytes = 0;/* initialize period_bytes */
+ hstream->bufsize = dmab->bytes;
+
+ ret = hda_dsp_stream_hw_params(sdev, hext_stream, dmab, NULL);
+ if (ret < 0)
+ dev_err(sdev->dev, "error: hdac prepare failed: %d\n", ret);
+
+ return ret;
+}
+
+int hda_dsp_trace_init(struct snd_sof_dev *sdev, struct snd_dma_buffer *dmab,
+ struct sof_ipc_dma_trace_params_ext *dtrace_params)
+{
+ struct sof_intel_hda_dev *hda = sdev->pdata->hw_pdata;
+ int ret;
+
+ hda->dtrace_stream = hda_dsp_stream_get(sdev, SNDRV_PCM_STREAM_CAPTURE,
+ SOF_HDA_STREAM_DMI_L1_COMPATIBLE);
+
+ if (!hda->dtrace_stream) {
+ dev_err(sdev->dev,
+ "error: no available capture stream for DMA trace\n");
+ return -ENODEV;
+ }
+
+ dtrace_params->stream_tag = hda->dtrace_stream->hstream.stream_tag;
+
+ /*
+ * initialize capture stream, set BDL address and return corresponding
+ * stream tag which will be sent to the firmware by IPC message.
+ */
+ ret = hda_dsp_trace_prepare(sdev, dmab);
+ if (ret < 0) {
+ dev_err(sdev->dev, "error: hdac trace init failed: %d\n", ret);
+ hda_dsp_stream_put(sdev, SNDRV_PCM_STREAM_CAPTURE,
+ dtrace_params->stream_tag);
+ hda->dtrace_stream = NULL;
+ dtrace_params->stream_tag = 0;
+ }
+
+ return ret;
+}
+
+int hda_dsp_trace_release(struct snd_sof_dev *sdev)
+{
+ struct sof_intel_hda_dev *hda = sdev->pdata->hw_pdata;
+ struct hdac_stream *hstream;
+
+ if (hda->dtrace_stream) {
+ hstream = &hda->dtrace_stream->hstream;
+ hda_dsp_stream_put(sdev,
+ SNDRV_PCM_STREAM_CAPTURE,
+ hstream->stream_tag);
+ hda->dtrace_stream = NULL;
+ return 0;
+ }
+
+ dev_dbg(sdev->dev, "DMA trace stream is not opened!\n");
+ return -ENODEV;
+}
+
+int hda_dsp_trace_trigger(struct snd_sof_dev *sdev, int cmd)
+{
+ struct sof_intel_hda_dev *hda = sdev->pdata->hw_pdata;
+
+ return hda_dsp_stream_trigger(sdev, hda->dtrace_stream, cmd);
+}