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632628df KM |
1 | // SPDX-License-Identifier: GPL-2.0+ |
2 | // | |
3 | // soc-util.c -- ALSA SoC Audio Layer utility functions | |
4 | // | |
5 | // Copyright 2009 Wolfson Microelectronics PLC. | |
6 | // | |
7 | // Author: Mark Brown <broonie@opensource.wolfsonmicro.com> | |
8 | // Liam Girdwood <lrg@slimlogic.co.uk> | |
7aae816d | 9 | |
848dd8be | 10 | #include <linux/platform_device.h> |
d81a6d71 | 11 | #include <linux/export.h> |
7aae816d MB |
12 | #include <sound/core.h> |
13 | #include <sound/pcm.h> | |
14 | #include <sound/pcm_params.h> | |
15 | #include <sound/soc.h> | |
16 | ||
17 | int snd_soc_calc_frame_size(int sample_size, int channels, int tdm_slots) | |
18 | { | |
19 | return sample_size * channels * tdm_slots; | |
20 | } | |
21 | EXPORT_SYMBOL_GPL(snd_soc_calc_frame_size); | |
22 | ||
23 | int snd_soc_params_to_frame_size(struct snd_pcm_hw_params *params) | |
24 | { | |
25 | int sample_size; | |
26 | ||
3d8b2ce0 MB |
27 | sample_size = snd_pcm_format_width(params_format(params)); |
28 | if (sample_size < 0) | |
29 | return sample_size; | |
7aae816d MB |
30 | |
31 | return snd_soc_calc_frame_size(sample_size, params_channels(params), | |
32 | 1); | |
33 | } | |
34 | EXPORT_SYMBOL_GPL(snd_soc_params_to_frame_size); | |
35 | ||
c0fa59df MB |
36 | int snd_soc_calc_bclk(int fs, int sample_size, int channels, int tdm_slots) |
37 | { | |
38 | return fs * snd_soc_calc_frame_size(sample_size, channels, tdm_slots); | |
39 | } | |
40 | EXPORT_SYMBOL_GPL(snd_soc_calc_bclk); | |
41 | ||
7aae816d MB |
42 | int snd_soc_params_to_bclk(struct snd_pcm_hw_params *params) |
43 | { | |
44 | int ret; | |
45 | ||
46 | ret = snd_soc_params_to_frame_size(params); | |
47 | ||
48 | if (ret > 0) | |
49 | return ret * params_rate(params); | |
50 | else | |
51 | return ret; | |
52 | } | |
53 | EXPORT_SYMBOL_GPL(snd_soc_params_to_bclk); | |
848dd8be | 54 | |
cefcc03f | 55 | static const struct snd_pcm_hardware dummy_dma_hardware = { |
cefcc03f MB |
56 | /* Random values to keep userspace happy when checking constraints */ |
57 | .info = SNDRV_PCM_INFO_INTERLEAVED | | |
58 | SNDRV_PCM_INFO_BLOCK_TRANSFER, | |
59 | .buffer_bytes_max = 128*1024, | |
60 | .period_bytes_min = PAGE_SIZE, | |
61 | .period_bytes_max = PAGE_SIZE*2, | |
62 | .periods_min = 2, | |
63 | .periods_max = 128, | |
64 | }; | |
65 | ||
a49e460f KM |
66 | static int dummy_dma_open(struct snd_soc_component *component, |
67 | struct snd_pcm_substream *substream) | |
cefcc03f | 68 | { |
0ceef681 | 69 | struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); |
7f05cc98 LG |
70 | |
71 | /* BE's dont need dummy params */ | |
72 | if (!rtd->dai_link->no_pcm) | |
73 | snd_soc_set_runtime_hwparams(substream, &dummy_dma_hardware); | |
cefcc03f MB |
74 | |
75 | return 0; | |
76 | } | |
77 | ||
2d59ebd3 | 78 | static const struct snd_soc_component_driver dummy_platform = { |
a49e460f | 79 | .open = dummy_dma_open, |
cefcc03f | 80 | }; |
848dd8be | 81 | |
03a0dded KM |
82 | static const struct snd_soc_component_driver dummy_codec = { |
83 | .idle_bias_on = 1, | |
84 | .use_pmdown_time = 1, | |
85 | .endianness = 1, | |
86 | .non_legacy_dai_naming = 1, | |
87 | }; | |
60b6f1a1 | 88 | |
abc17b29 | 89 | #define STUB_RATES SNDRV_PCM_RATE_8000_384000 |
60b6f1a1 SS |
90 | #define STUB_FORMATS (SNDRV_PCM_FMTBIT_S8 | \ |
91 | SNDRV_PCM_FMTBIT_U8 | \ | |
92 | SNDRV_PCM_FMTBIT_S16_LE | \ | |
93 | SNDRV_PCM_FMTBIT_U16_LE | \ | |
94 | SNDRV_PCM_FMTBIT_S24_LE | \ | |
abc17b29 | 95 | SNDRV_PCM_FMTBIT_S24_3LE | \ |
60b6f1a1 SS |
96 | SNDRV_PCM_FMTBIT_U24_LE | \ |
97 | SNDRV_PCM_FMTBIT_S32_LE | \ | |
98 | SNDRV_PCM_FMTBIT_U32_LE | \ | |
99 | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE) | |
ba9e82a1 KM |
100 | |
101 | /* | |
102 | * Select these from Sound Card Manually | |
103 | * SND_SOC_POSSIBLE_DAIFMT_CBP_CFP | |
104 | * SND_SOC_POSSIBLE_DAIFMT_CBP_CFC | |
105 | * SND_SOC_POSSIBLE_DAIFMT_CBC_CFP | |
106 | * SND_SOC_POSSIBLE_DAIFMT_CBC_CFC | |
107 | */ | |
108 | static u64 dummy_dai_formats = | |
109 | SND_SOC_POSSIBLE_DAIFMT_I2S | | |
110 | SND_SOC_POSSIBLE_DAIFMT_RIGHT_J | | |
111 | SND_SOC_POSSIBLE_DAIFMT_LEFT_J | | |
112 | SND_SOC_POSSIBLE_DAIFMT_DSP_A | | |
113 | SND_SOC_POSSIBLE_DAIFMT_DSP_B | | |
114 | SND_SOC_POSSIBLE_DAIFMT_AC97 | | |
115 | SND_SOC_POSSIBLE_DAIFMT_PDM | | |
116 | SND_SOC_POSSIBLE_DAIFMT_GATED | | |
117 | SND_SOC_POSSIBLE_DAIFMT_CONT | | |
118 | SND_SOC_POSSIBLE_DAIFMT_NB_NF | | |
119 | SND_SOC_POSSIBLE_DAIFMT_NB_IF | | |
120 | SND_SOC_POSSIBLE_DAIFMT_IB_NF | | |
121 | SND_SOC_POSSIBLE_DAIFMT_IB_IF; | |
122 | ||
123 | static const struct snd_soc_dai_ops dummy_dai_ops = { | |
124 | .auto_selectable_formats = &dummy_dai_formats, | |
125 | .num_auto_selectable_formats = 1, | |
126 | }; | |
127 | ||
d76f4198 AP |
128 | /* |
129 | * The dummy CODEC is only meant to be used in situations where there is no | |
130 | * actual hardware. | |
131 | * | |
132 | * If there is actual hardware even if it does not have a control bus | |
133 | * the hardware will still have constraints like supported samplerates, etc. | |
134 | * which should be modelled. And the data flow graph also should be modelled | |
135 | * using DAPM. | |
136 | */ | |
7aca69f9 LG |
137 | static struct snd_soc_dai_driver dummy_dai = { |
138 | .name = "snd-soc-dummy-dai", | |
60b6f1a1 SS |
139 | .playback = { |
140 | .stream_name = "Playback", | |
141 | .channels_min = 1, | |
142 | .channels_max = 384, | |
143 | .rates = STUB_RATES, | |
144 | .formats = STUB_FORMATS, | |
145 | }, | |
146 | .capture = { | |
147 | .stream_name = "Capture", | |
148 | .channels_min = 1, | |
149 | .channels_max = 384, | |
150 | .rates = STUB_RATES, | |
151 | .formats = STUB_FORMATS, | |
152 | }, | |
ba9e82a1 | 153 | .ops = &dummy_dai_ops, |
7aca69f9 LG |
154 | }; |
155 | ||
bece9e95 LG |
156 | int snd_soc_dai_is_dummy(struct snd_soc_dai *dai) |
157 | { | |
158 | if (dai->driver == &dummy_dai) | |
159 | return 1; | |
160 | return 0; | |
161 | } | |
162 | ||
8f1a1681 KM |
163 | int snd_soc_component_is_dummy(struct snd_soc_component *component) |
164 | { | |
165 | return ((component->driver == &dummy_platform) || | |
166 | (component->driver == &dummy_codec)); | |
167 | } | |
168 | ||
e51e97ee | 169 | static int snd_soc_dummy_probe(struct platform_device *pdev) |
848dd8be | 170 | { |
7aca69f9 LG |
171 | int ret; |
172 | ||
03a0dded KM |
173 | ret = devm_snd_soc_register_component(&pdev->dev, |
174 | &dummy_codec, &dummy_dai, 1); | |
7aca69f9 LG |
175 | if (ret < 0) |
176 | return ret; | |
177 | ||
2d59ebd3 KM |
178 | ret = devm_snd_soc_register_component(&pdev->dev, &dummy_platform, |
179 | NULL, 0); | |
7aca69f9 LG |
180 | |
181 | return ret; | |
848dd8be MB |
182 | } |
183 | ||
848dd8be MB |
184 | static struct platform_driver soc_dummy_driver = { |
185 | .driver = { | |
186 | .name = "snd-soc-dummy", | |
848dd8be MB |
187 | }, |
188 | .probe = snd_soc_dummy_probe, | |
848dd8be MB |
189 | }; |
190 | ||
191 | static struct platform_device *soc_dummy_dev; | |
192 | ||
fb257897 | 193 | int __init snd_soc_util_init(void) |
848dd8be MB |
194 | { |
195 | int ret; | |
196 | ||
7d0cd223 UKK |
197 | soc_dummy_dev = |
198 | platform_device_register_simple("snd-soc-dummy", -1, NULL, 0); | |
199 | if (IS_ERR(soc_dummy_dev)) | |
200 | return PTR_ERR(soc_dummy_dev); | |
848dd8be MB |
201 | |
202 | ret = platform_driver_register(&soc_dummy_driver); | |
203 | if (ret != 0) | |
204 | platform_device_unregister(soc_dummy_dev); | |
205 | ||
206 | return ret; | |
207 | } | |
848dd8be | 208 | |
fb257897 | 209 | void __exit snd_soc_util_exit(void) |
848dd8be | 210 | { |
848dd8be | 211 | platform_driver_unregister(&soc_dummy_driver); |
b66c9b91 | 212 | platform_device_unregister(soc_dummy_dev); |
848dd8be | 213 | } |