1// SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
2//
3// This file is provided under a dual BSD/GPLv2 license. When using or
4// redistributing this file, you may do so under either license.
5//
6// Copyright(c) 2021 Advanced Micro Devices, Inc.
7//
8// Authors: Ajit Kumar Pandey <AjitKumar.Pandey@amd.com>
9
10/*
11 * PCM interface for generic AMD audio ACP DSP block
12 */
13#include <sound/pcm_params.h>
14
15#include "../ops.h"
16#include "acp.h"
17#include "acp-dsp-offset.h"
18
19int acp_pcm_hw_params(struct snd_sof_dev *sdev, struct snd_pcm_substream *substream,
20		      struct snd_pcm_hw_params *params,
21		      struct snd_sof_platform_stream_params *platform_params)
22{
23	struct snd_pcm_runtime *runtime = substream->runtime;
24	struct acp_dsp_stream *stream = runtime->private_data;
25	unsigned int buf_offset, index;
26	u32 size;
27	int ret;
28
29	size = runtime->dma_bytes;
30	stream->num_pages = PFN_UP(runtime->dma_bytes);
31	stream->dmab = substream->runtime->dma_buffer_p;
32
33	ret = acp_dsp_stream_config(sdev, stream);
34	if (ret < 0) {
35		dev_err(sdev->dev, "stream configuration failed\n");
36		return ret;
37	}
38
39	platform_params->use_phy_address = true;
40	platform_params->phy_addr = stream->reg_offset;
41	platform_params->stream_tag = stream->stream_tag;
42	platform_params->cont_update_posn = 1;
43
44	/* write buffer size of stream in scratch memory */
45
46	buf_offset = sdev->debug_box.offset +
47		     offsetof(struct scratch_reg_conf, buf_size);
48	index = stream->stream_tag - 1;
49	buf_offset = buf_offset + index * 4;
50
51	snd_sof_dsp_write(sdev, ACP_DSP_BAR, ACP_SCRATCH_REG_0 + buf_offset, size);
52
53	return 0;
54}
55EXPORT_SYMBOL_NS(acp_pcm_hw_params, SND_SOC_SOF_AMD_COMMON);
56
57int acp_pcm_open(struct snd_sof_dev *sdev, struct snd_pcm_substream *substream)
58{
59	struct acp_dsp_stream *stream;
60
61	stream = acp_dsp_stream_get(sdev, 0);
62	if (!stream)
63		return -ENODEV;
64
65	substream->runtime->private_data = stream;
66	stream->substream = substream;
67
68	return 0;
69}
70EXPORT_SYMBOL_NS(acp_pcm_open, SND_SOC_SOF_AMD_COMMON);
71
72int acp_pcm_close(struct snd_sof_dev *sdev, struct snd_pcm_substream *substream)
73{
74	struct acp_dsp_stream *stream;
75
76	stream = substream->runtime->private_data;
77	if (!stream) {
78		dev_err(sdev->dev, "No open stream\n");
79		return -EINVAL;
80	}
81
82	stream->substream = NULL;
83	substream->runtime->private_data = NULL;
84
85	return acp_dsp_stream_put(sdev, stream);
86}
87EXPORT_SYMBOL_NS(acp_pcm_close, SND_SOC_SOF_AMD_COMMON);
88
89snd_pcm_uframes_t acp_pcm_pointer(struct snd_sof_dev *sdev,
90				  struct snd_pcm_substream *substream)
91{
92	struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
93	struct snd_soc_component *scomp = sdev->component;
94	struct snd_sof_pcm_stream *stream;
95	struct sof_ipc_stream_posn posn;
96	struct snd_sof_pcm *spcm;
97	snd_pcm_uframes_t pos;
98	int ret;
99
100	spcm = snd_sof_find_spcm_dai(scomp, rtd);
101	if (!spcm) {
102		dev_warn_ratelimited(sdev->dev, "warn: can't find PCM with DAI ID %d\n",
103				     rtd->dai_link->id);
104		return 0;
105	}
106
107	stream = &spcm->stream[substream->stream];
108	ret = snd_sof_ipc_msg_data(sdev, stream, &posn, sizeof(posn));
109	if (ret < 0) {
110		dev_warn(sdev->dev, "failed to read stream position: %d\n", ret);
111		return 0;
112	}
113
114	memcpy(&stream->posn, &posn, sizeof(posn));
115	pos = spcm->stream[substream->stream].posn.host_posn;
116	pos = bytes_to_frames(substream->runtime, pos);
117
118	return pos;
119}
120EXPORT_SYMBOL_NS(acp_pcm_pointer, SND_SOC_SOF_AMD_COMMON);
121