ASoC: dapm: Use DAPM mutex for DAPM ops instead of codec mutex
[linux-2.6.git] / sound / soc / soc-utils.c
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
16 #include <linux/platform_device.h>
17 #include <sound/core.h>
18 #include <sound/pcm.h>
19 #include <sound/pcm_params.h>
20 #include <sound/soc.h>
21
22 int snd_soc_calc_frame_size(int sample_size, int channels, int tdm_slots)
23 {
24         return sample_size * channels * tdm_slots;
25 }
26 EXPORT_SYMBOL_GPL(snd_soc_calc_frame_size);
27
28 int snd_soc_params_to_frame_size(struct snd_pcm_hw_params *params)
29 {
30         int sample_size;
31
32         sample_size = snd_pcm_format_width(params_format(params));
33         if (sample_size < 0)
34                 return sample_size;
35
36         return snd_soc_calc_frame_size(sample_size, params_channels(params),
37                                        1);
38 }
39 EXPORT_SYMBOL_GPL(snd_soc_params_to_frame_size);
40
41 int snd_soc_calc_bclk(int fs, int sample_size, int channels, int tdm_slots)
42 {
43         return fs * snd_soc_calc_frame_size(sample_size, channels, tdm_slots);
44 }
45 EXPORT_SYMBOL_GPL(snd_soc_calc_bclk);
46
47 int snd_soc_params_to_bclk(struct snd_pcm_hw_params *params)
48 {
49         int ret;
50
51         ret = snd_soc_params_to_frame_size(params);
52
53         if (ret > 0)
54                 return ret * params_rate(params);
55         else
56                 return ret;
57 }
58 EXPORT_SYMBOL_GPL(snd_soc_params_to_bclk);
59
60 static const struct snd_pcm_hardware dummy_dma_hardware = {
61         .formats                = 0xffffffff,
62         .channels_min           = 1,
63         .channels_max           = UINT_MAX,
64
65         /* Random values to keep userspace happy when checking constraints */
66         .info                   = SNDRV_PCM_INFO_INTERLEAVED |
67                                   SNDRV_PCM_INFO_BLOCK_TRANSFER,
68         .buffer_bytes_max       = 128*1024,
69         .period_bytes_min       = PAGE_SIZE,
70         .period_bytes_max       = PAGE_SIZE*2,
71         .periods_min            = 2,
72         .periods_max            = 128,
73 };
74
75 static int dummy_dma_open(struct snd_pcm_substream *substream)
76 {
77         snd_soc_set_runtime_hwparams(substream, &dummy_dma_hardware);
78
79         return 0;
80 }
81
82 static struct snd_pcm_ops dummy_dma_ops = {
83         .open           = dummy_dma_open,
84         .ioctl          = snd_pcm_lib_ioctl,
85 };
86
87 static struct snd_soc_platform_driver dummy_platform = {
88         .ops = &dummy_dma_ops,
89 };
90
91 static __devinit int snd_soc_dummy_probe(struct platform_device *pdev)
92 {
93         return snd_soc_register_platform(&pdev->dev, &dummy_platform);
94 }
95
96 static __devexit int snd_soc_dummy_remove(struct platform_device *pdev)
97 {
98         snd_soc_unregister_platform(&pdev->dev);
99
100         return 0;
101 }
102
103 static struct platform_driver soc_dummy_driver = {
104         .driver = {
105                 .name = "snd-soc-dummy",
106                 .owner = THIS_MODULE,
107         },
108         .probe = snd_soc_dummy_probe,
109         .remove = __devexit_p(snd_soc_dummy_remove),
110 };
111
112 static struct platform_device *soc_dummy_dev;
113
114 int __init snd_soc_util_init(void)
115 {
116         int ret;
117
118         soc_dummy_dev = platform_device_alloc("snd-soc-dummy", -1);
119         if (!soc_dummy_dev)
120                 return -ENOMEM;
121
122         ret = platform_device_add(soc_dummy_dev);
123         if (ret != 0) {
124                 platform_device_put(soc_dummy_dev);
125                 return ret;
126         }
127
128         ret = platform_driver_register(&soc_dummy_driver);
129         if (ret != 0)
130                 platform_device_unregister(soc_dummy_dev);
131
132         return ret;
133 }
134
135 void __exit snd_soc_util_exit(void)
136 {
137         platform_device_unregister(soc_dummy_dev);
138         platform_driver_unregister(&soc_dummy_driver);
139 }