1 files changed, 250 insertions, 0 deletions
diff --git a/sound/soc/sof/intel/hda-pcm.c b/sound/soc/sof/intel/hda-pcm.c
new file mode 100644
index 000000000..b527d5958
--- /dev/null
+++ b/sound/soc/sof/intel/hda-pcm.c
@@ -0,0 +1,250 @@
+// 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/hda_register.h>
+#include <sound/pcm_params.h>
+#include "../sof-audio.h"
+#include "../ops.h"
+#include "hda.h"
+
+#define SDnFMT_BASE(x)	((x) << 14)
+#define SDnFMT_MULT(x)	(((x) - 1) << 11)
+#define SDnFMT_DIV(x)	(((x) - 1) << 8)
+#define SDnFMT_BITS(x)	((x) << 4)
+#define SDnFMT_CHAN(x)	((x) << 0)
+
+u32 hda_dsp_get_mult_div(struct snd_sof_dev *sdev, int rate)
+{
+	switch (rate) {
+	case 8000:
+		return SDnFMT_DIV(6);
+	case 9600:
+		return SDnFMT_DIV(5);
+	case 11025:
+		return SDnFMT_BASE(1) | SDnFMT_DIV(4);
+	case 16000:
+		return SDnFMT_DIV(3);
+	case 22050:
+		return SDnFMT_BASE(1) | SDnFMT_DIV(2);
+	case 32000:
+		return SDnFMT_DIV(3) | SDnFMT_MULT(2);
+	case 44100:
+		return SDnFMT_BASE(1);
+	case 48000:
+		return 0;
+	case 88200:
+		return SDnFMT_BASE(1) | SDnFMT_MULT(2);
+	case 96000:
+		return SDnFMT_MULT(2);
+	case 176400:
+		return SDnFMT_BASE(1) | SDnFMT_MULT(4);
+	case 192000:
+		return SDnFMT_MULT(4);
+	default:
+		dev_warn(sdev->dev, "can't find div rate %d using 48kHz\n",
+			 rate);
+		return 0; /* use 48KHz if not found */
+	}
+};
+
+u32 hda_dsp_get_bits(struct snd_sof_dev *sdev, int sample_bits)
+{
+	switch (sample_bits) {
+	case 8:
+		return SDnFMT_BITS(0);
+	case 16:
+		return SDnFMT_BITS(1);
+	case 20:
+		return SDnFMT_BITS(2);
+	case 24:
+		return SDnFMT_BITS(3);
+	case 32:
+		return SDnFMT_BITS(4);
+	default:
+		dev_warn(sdev->dev, "can't find %d bits using 16bit\n",
+			 sample_bits);
+		return SDnFMT_BITS(1); /* use 16bits format if not found */
+	}
+};
+
+int hda_dsp_pcm_hw_params(struct snd_sof_dev *sdev,
+			  struct snd_pcm_substream *substream,
+			  struct snd_pcm_hw_params *params,
+			  struct sof_ipc_stream_params *ipc_params)
+{
+	struct hdac_stream *hstream = substream->runtime->private_data;
+	struct hdac_ext_stream *stream = stream_to_hdac_ext_stream(hstream);
+	struct sof_intel_hda_dev *hda = sdev->pdata->hw_pdata;
+	struct snd_dma_buffer *dmab;
+	struct sof_ipc_fw_version *v = &sdev->fw_ready.version;
+	int ret;
+	u32 size, rate, bits;
+
+	size = params_buffer_bytes(params);
+	rate = hda_dsp_get_mult_div(sdev, params_rate(params));
+	bits = hda_dsp_get_bits(sdev, params_width(params));
+
+	hstream->substream = substream;
+
+	dmab = substream->runtime->dma_buffer_p;
+
+	hstream->format_val = rate | bits | (params_channels(params) - 1);
+	hstream->bufsize = size;
+	hstream->period_bytes = params_period_bytes(params);
+	hstream->no_period_wakeup  =
+			(params->info & SNDRV_PCM_INFO_NO_PERIOD_WAKEUP) &&
+			(params->flags & SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP);
+
+	ret = hda_dsp_stream_hw_params(sdev, stream, dmab, params);
+	if (ret < 0) {
+		dev_err(sdev->dev, "error: hdac prepare failed: %x\n", ret);
+		return ret;
+	}
+
+	/* disable SPIB, to enable buffer wrap for stream */
+	hda_dsp_stream_spib_config(sdev, stream, HDA_DSP_SPIB_DISABLE, 0);
+
+	/* update no_stream_position flag for ipc params */
+	if (hda && hda->no_ipc_position) {
+		/* For older ABIs set host_period_bytes to zero to inform
+		 * FW we don't want position updates. Newer versions use
+		 * no_stream_position for this purpose.
+		 */
+		if (v->abi_version < SOF_ABI_VER(3, 10, 0))
+			ipc_params->host_period_bytes = 0;
+		else
+			ipc_params->no_stream_position = 1;
+	}
+
+	ipc_params->stream_tag = hstream->stream_tag;
+
+	return 0;
+}
+
+int hda_dsp_pcm_trigger(struct snd_sof_dev *sdev,
+			struct snd_pcm_substream *substream, int cmd)
+{
+	struct hdac_stream *hstream = substream->runtime->private_data;
+	struct hdac_ext_stream *stream = stream_to_hdac_ext_stream(hstream);
+
+	return hda_dsp_stream_trigger(sdev, stream, cmd);
+}
+
+snd_pcm_uframes_t hda_dsp_pcm_pointer(struct snd_sof_dev *sdev,
+				      struct snd_pcm_substream *substream)
+{
+	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
+	struct snd_soc_component *scomp = sdev->component;
+	struct hdac_stream *hstream = substream->runtime->private_data;
+	struct sof_intel_hda_dev *hda = sdev->pdata->hw_pdata;
+	struct snd_sof_pcm *spcm;
+	snd_pcm_uframes_t pos;
+
+	spcm = snd_sof_find_spcm_dai(scomp, rtd);
+	if (!spcm) {
+		dev_warn_ratelimited(sdev->dev, "warn: can't find PCM with DAI ID %d\n",
+				     rtd->dai_link->id);
+		return 0;
+	}
+
+	if (hda && !hda->no_ipc_position) {
+		/* read position from IPC position */
+		pos = spcm->stream[substream->stream].posn.host_posn;
+		goto found;
+	}
+
+	/*
+	 * DPIB/posbuf position mode:
+	 * For Playback, Use DPIB register from HDA space which
+	 * reflects the actual data transferred.
+	 * For Capture, Use the position buffer for pointer, as DPIB
+	 * is not accurate enough, its update may be completed
+	 * earlier than the data written to DDR.
+	 */
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+		pos = snd_sof_dsp_read(sdev, HDA_DSP_HDA_BAR,
+				       AZX_REG_VS_SDXDPIB_XBASE +
+				       (AZX_REG_VS_SDXDPIB_XINTERVAL *
+					hstream->index));
+	} else {
+		/*
+		 * For capture stream, we need more workaround to fix the
+		 * position incorrect issue:
+		 *
+		 * 1. Wait at least 20us before reading position buffer after
+		 * the interrupt generated(IOC), to make sure position update
+		 * happens on frame boundary i.e. 20.833uSec for 48KHz.
+		 * 2. Perform a dummy Read to DPIB register to flush DMA
+		 * position value.
+		 * 3. Read the DMA Position from posbuf. Now the readback
+		 * value should be >= period boundary.
+		 */
+		usleep_range(20, 21);
+		snd_sof_dsp_read(sdev, HDA_DSP_HDA_BAR,
+				 AZX_REG_VS_SDXDPIB_XBASE +
+				 (AZX_REG_VS_SDXDPIB_XINTERVAL *
+				  hstream->index));
+		pos = snd_hdac_stream_get_pos_posbuf(hstream);
+	}
+
+	if (pos >= hstream->bufsize)
+		pos = 0;
+
+found:
+	pos = bytes_to_frames(substream->runtime, pos);
+
+	dev_vdbg(sdev->dev, "PCM: stream %d dir %d position %lu\n",
+		 hstream->index, substream->stream, pos);
+	return pos;
+}
+
+int hda_dsp_pcm_open(struct snd_sof_dev *sdev,
+		     struct snd_pcm_substream *substream)
+{
+	struct hdac_ext_stream *dsp_stream;
+	int direction = substream->stream;
+
+	dsp_stream = hda_dsp_stream_get(sdev, direction);
+
+	if (!dsp_stream) {
+		dev_err(sdev->dev, "error: no stream available\n");
+		return -ENODEV;
+	}
+
+	/* binding pcm substream to hda stream */
+	substream->runtime->private_data = &dsp_stream->hstream;
+	return 0;
+}
+
+int hda_dsp_pcm_close(struct snd_sof_dev *sdev,
+		      struct snd_pcm_substream *substream)
+{
+	struct hdac_stream *hstream = substream->runtime->private_data;
+	int direction = substream->stream;
+	int ret;
+
+	ret = hda_dsp_stream_put(sdev, direction, hstream->stream_tag);
+
+	if (ret) {
+		dev_dbg(sdev->dev, "stream %s not opened!\n", substream->name);
+		return -ENODEV;
+	}
+
+	/* unbinding pcm substream to hda stream */
+	substream->runtime->private_data = NULL;
+	return 0;
+}