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
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 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 }
55 EXPORT_SYMBOL_NS(acp_pcm_hw_params, SND_SOC_SOF_AMD_COMMON);
56
57 int 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 }
70 EXPORT_SYMBOL_NS(acp_pcm_open, SND_SOC_SOF_AMD_COMMON);
71
72 int 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 }
87 EXPORT_SYMBOL_NS(acp_pcm_close, SND_SOC_SOF_AMD_COMMON);
88
89 snd_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 }
120 EXPORT_SYMBOL_NS(acp_pcm_pointer, SND_SOC_SOF_AMD_COMMON);
121
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