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
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)19 int 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
43 /* write buffer size of stream in scratch memory */
44
45 buf_offset = offsetof(struct scratch_reg_conf, buf_size);
46 index = stream->stream_tag - 1;
47 buf_offset = buf_offset + index * 4;
48
49 snd_sof_dsp_write(sdev, ACP_DSP_BAR, ACP_SCRATCH_REG_0 + buf_offset, size);
50
51 return 0;
52 }
53 EXPORT_SYMBOL_NS(acp_pcm_hw_params, SND_SOC_SOF_AMD_COMMON);
54
acp_pcm_open(struct snd_sof_dev * sdev,struct snd_pcm_substream * substream)55 int acp_pcm_open(struct snd_sof_dev *sdev, struct snd_pcm_substream *substream)
56 {
57 struct acp_dsp_stream *stream;
58
59 stream = acp_dsp_stream_get(sdev, 0);
60 if (!stream)
61 return -ENODEV;
62
63 substream->runtime->private_data = stream;
64 stream->substream = substream;
65
66 return 0;
67 }
68 EXPORT_SYMBOL_NS(acp_pcm_open, SND_SOC_SOF_AMD_COMMON);
69
acp_pcm_close(struct snd_sof_dev * sdev,struct snd_pcm_substream * substream)70 int acp_pcm_close(struct snd_sof_dev *sdev, struct snd_pcm_substream *substream)
71 {
72 struct acp_dsp_stream *stream;
73
74 stream = substream->runtime->private_data;
75 if (!stream) {
76 dev_err(sdev->dev, "No open stream\n");
77 return -EINVAL;
78 }
79
80 stream->substream = NULL;
81 substream->runtime->private_data = NULL;
82
83 return acp_dsp_stream_put(sdev, stream);
84 }
85 EXPORT_SYMBOL_NS(acp_pcm_close, SND_SOC_SOF_AMD_COMMON);
86