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7aae816d MB |
1 | /* |
2 | * soc-util.c -- ALSA SoC Audio Layer utility functions | |
3 | * | |
4 | * Copyright 2009 Wolfson Microelectronics PLC. | |
5 | * | |
6 | * Author: Mark Brown <broonie@opensource.wolfsonmicro.com> | |
7 | * Liam Girdwood <lrg@slimlogic.co.uk> | |
8 | * | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify it | |
11 | * under the terms of the GNU General Public License as published by the | |
12 | * Free Software Foundation; either version 2 of the License, or (at your | |
13 | * option) any later version. | |
14 | */ | |
15 | ||
848dd8be | 16 | #include <linux/platform_device.h> |
d81a6d71 | 17 | #include <linux/export.h> |
7aae816d MB |
18 | #include <sound/core.h> |
19 | #include <sound/pcm.h> | |
20 | #include <sound/pcm_params.h> | |
21 | #include <sound/soc.h> | |
22 | ||
23 | int snd_soc_calc_frame_size(int sample_size, int channels, int tdm_slots) | |
24 | { | |
25 | return sample_size * channels * tdm_slots; | |
26 | } | |
27 | EXPORT_SYMBOL_GPL(snd_soc_calc_frame_size); | |
28 | ||
29 | int snd_soc_params_to_frame_size(struct snd_pcm_hw_params *params) | |
30 | { | |
31 | int sample_size; | |
32 | ||
3d8b2ce0 MB |
33 | sample_size = snd_pcm_format_width(params_format(params)); |
34 | if (sample_size < 0) | |
35 | return sample_size; | |
7aae816d MB |
36 | |
37 | return snd_soc_calc_frame_size(sample_size, params_channels(params), | |
38 | 1); | |
39 | } | |
40 | EXPORT_SYMBOL_GPL(snd_soc_params_to_frame_size); | |
41 | ||
c0fa59df MB |
42 | int snd_soc_calc_bclk(int fs, int sample_size, int channels, int tdm_slots) |
43 | { | |
44 | return fs * snd_soc_calc_frame_size(sample_size, channels, tdm_slots); | |
45 | } | |
46 | EXPORT_SYMBOL_GPL(snd_soc_calc_bclk); | |
47 | ||
7aae816d MB |
48 | int snd_soc_params_to_bclk(struct snd_pcm_hw_params *params) |
49 | { | |
50 | int ret; | |
51 | ||
52 | ret = snd_soc_params_to_frame_size(params); | |
53 | ||
54 | if (ret > 0) | |
55 | return ret * params_rate(params); | |
56 | else | |
57 | return ret; | |
58 | } | |
59 | EXPORT_SYMBOL_GPL(snd_soc_params_to_bclk); | |
848dd8be | 60 | |
cefcc03f | 61 | static const struct snd_pcm_hardware dummy_dma_hardware = { |
cefcc03f MB |
62 | /* Random values to keep userspace happy when checking constraints */ |
63 | .info = SNDRV_PCM_INFO_INTERLEAVED | | |
64 | SNDRV_PCM_INFO_BLOCK_TRANSFER, | |
65 | .buffer_bytes_max = 128*1024, | |
66 | .period_bytes_min = PAGE_SIZE, | |
67 | .period_bytes_max = PAGE_SIZE*2, | |
68 | .periods_min = 2, | |
69 | .periods_max = 128, | |
70 | }; | |
71 | ||
72 | static int dummy_dma_open(struct snd_pcm_substream *substream) | |
73 | { | |
7f05cc98 LG |
74 | struct snd_soc_pcm_runtime *rtd = substream->private_data; |
75 | ||
76 | /* BE's dont need dummy params */ | |
77 | if (!rtd->dai_link->no_pcm) | |
78 | snd_soc_set_runtime_hwparams(substream, &dummy_dma_hardware); | |
cefcc03f MB |
79 | |
80 | return 0; | |
81 | } | |
82 | ||
83 | static struct snd_pcm_ops dummy_dma_ops = { | |
84 | .open = dummy_dma_open, | |
85 | .ioctl = snd_pcm_lib_ioctl, | |
86 | }; | |
87 | ||
88 | static struct snd_soc_platform_driver dummy_platform = { | |
89 | .ops = &dummy_dma_ops, | |
90 | }; | |
848dd8be | 91 | |
7aca69f9 | 92 | static struct snd_soc_codec_driver dummy_codec; |
60b6f1a1 SS |
93 | |
94 | #define STUB_RATES SNDRV_PCM_RATE_8000_192000 | |
95 | #define STUB_FORMATS (SNDRV_PCM_FMTBIT_S8 | \ | |
96 | SNDRV_PCM_FMTBIT_U8 | \ | |
97 | SNDRV_PCM_FMTBIT_S16_LE | \ | |
98 | SNDRV_PCM_FMTBIT_U16_LE | \ | |
99 | SNDRV_PCM_FMTBIT_S24_LE | \ | |
100 | SNDRV_PCM_FMTBIT_U24_LE | \ | |
101 | SNDRV_PCM_FMTBIT_S32_LE | \ | |
102 | SNDRV_PCM_FMTBIT_U32_LE | \ | |
103 | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE) | |
d76f4198 AP |
104 | /* |
105 | * The dummy CODEC is only meant to be used in situations where there is no | |
106 | * actual hardware. | |
107 | * | |
108 | * If there is actual hardware even if it does not have a control bus | |
109 | * the hardware will still have constraints like supported samplerates, etc. | |
110 | * which should be modelled. And the data flow graph also should be modelled | |
111 | * using DAPM. | |
112 | */ | |
7aca69f9 LG |
113 | static struct snd_soc_dai_driver dummy_dai = { |
114 | .name = "snd-soc-dummy-dai", | |
60b6f1a1 SS |
115 | .playback = { |
116 | .stream_name = "Playback", | |
117 | .channels_min = 1, | |
118 | .channels_max = 384, | |
119 | .rates = STUB_RATES, | |
120 | .formats = STUB_FORMATS, | |
121 | }, | |
122 | .capture = { | |
123 | .stream_name = "Capture", | |
124 | .channels_min = 1, | |
125 | .channels_max = 384, | |
126 | .rates = STUB_RATES, | |
127 | .formats = STUB_FORMATS, | |
128 | }, | |
7aca69f9 LG |
129 | }; |
130 | ||
bece9e95 LG |
131 | int snd_soc_dai_is_dummy(struct snd_soc_dai *dai) |
132 | { | |
133 | if (dai->driver == &dummy_dai) | |
134 | return 1; | |
135 | return 0; | |
136 | } | |
137 | ||
e51e97ee | 138 | static int snd_soc_dummy_probe(struct platform_device *pdev) |
848dd8be | 139 | { |
7aca69f9 LG |
140 | int ret; |
141 | ||
142 | ret = snd_soc_register_codec(&pdev->dev, &dummy_codec, &dummy_dai, 1); | |
143 | if (ret < 0) | |
144 | return ret; | |
145 | ||
146 | ret = snd_soc_register_platform(&pdev->dev, &dummy_platform); | |
147 | if (ret < 0) { | |
148 | snd_soc_unregister_codec(&pdev->dev); | |
149 | return ret; | |
150 | } | |
151 | ||
152 | return ret; | |
848dd8be MB |
153 | } |
154 | ||
e51e97ee | 155 | static int snd_soc_dummy_remove(struct platform_device *pdev) |
848dd8be MB |
156 | { |
157 | snd_soc_unregister_platform(&pdev->dev); | |
7aca69f9 | 158 | snd_soc_unregister_codec(&pdev->dev); |
848dd8be MB |
159 | |
160 | return 0; | |
161 | } | |
162 | ||
163 | static struct platform_driver soc_dummy_driver = { | |
164 | .driver = { | |
165 | .name = "snd-soc-dummy", | |
848dd8be MB |
166 | }, |
167 | .probe = snd_soc_dummy_probe, | |
e51e97ee | 168 | .remove = snd_soc_dummy_remove, |
848dd8be MB |
169 | }; |
170 | ||
171 | static struct platform_device *soc_dummy_dev; | |
172 | ||
fb257897 | 173 | int __init snd_soc_util_init(void) |
848dd8be MB |
174 | { |
175 | int ret; | |
176 | ||
7d0cd223 UKK |
177 | soc_dummy_dev = |
178 | platform_device_register_simple("snd-soc-dummy", -1, NULL, 0); | |
179 | if (IS_ERR(soc_dummy_dev)) | |
180 | return PTR_ERR(soc_dummy_dev); | |
848dd8be MB |
181 | |
182 | ret = platform_driver_register(&soc_dummy_driver); | |
183 | if (ret != 0) | |
184 | platform_device_unregister(soc_dummy_dev); | |
185 | ||
186 | return ret; | |
187 | } | |
848dd8be | 188 | |
fb257897 | 189 | void __exit snd_soc_util_exit(void) |
848dd8be MB |
190 | { |
191 | platform_device_unregister(soc_dummy_dev); | |
192 | platform_driver_unregister(&soc_dummy_driver); | |
193 | } |