blob: ec921ec99c2621eaa58b7d0c5e4eb97b861971de [file] [log] [blame]
Mark Brown7aae8162009-11-10 16:08:04 +00001/*
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
Mark Brown848dd8b2011-04-27 18:16:32 +010016#include <linux/platform_device.h>
Mark Brown7aae8162009-11-10 16:08:04 +000017#include <sound/core.h>
18#include <sound/pcm.h>
19#include <sound/pcm_params.h>
20#include <sound/soc.h>
21
22int snd_soc_calc_frame_size(int sample_size, int channels, int tdm_slots)
23{
24 return sample_size * channels * tdm_slots;
25}
26EXPORT_SYMBOL_GPL(snd_soc_calc_frame_size);
27
28int snd_soc_params_to_frame_size(struct snd_pcm_hw_params *params)
29{
30 int sample_size;
31
Mark Brown3d8b2ce2011-01-31 20:14:38 +000032 sample_size = snd_pcm_format_width(params_format(params));
33 if (sample_size < 0)
34 return sample_size;
Mark Brown7aae8162009-11-10 16:08:04 +000035
36 return snd_soc_calc_frame_size(sample_size, params_channels(params),
37 1);
38}
39EXPORT_SYMBOL_GPL(snd_soc_params_to_frame_size);
40
Mark Brownc0fa59d2009-11-19 11:36:10 +000041int 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}
45EXPORT_SYMBOL_GPL(snd_soc_calc_bclk);
46
Mark Brown7aae8162009-11-10 16:08:04 +000047int 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}
58EXPORT_SYMBOL_GPL(snd_soc_params_to_bclk);
Mark Brown848dd8b2011-04-27 18:16:32 +010059
60static struct snd_soc_platform_driver dummy_platform;
61
62static __devinit int snd_soc_dummy_probe(struct platform_device *pdev)
63{
64 return snd_soc_register_platform(&pdev->dev, &dummy_platform);
65}
66
67static __devexit int snd_soc_dummy_remove(struct platform_device *pdev)
68{
69 snd_soc_unregister_platform(&pdev->dev);
70
71 return 0;
72}
73
74static struct platform_driver soc_dummy_driver = {
75 .driver = {
76 .name = "snd-soc-dummy",
77 .owner = THIS_MODULE,
78 },
79 .probe = snd_soc_dummy_probe,
80 .remove = __devexit_p(snd_soc_dummy_remove),
81};
82
83static struct platform_device *soc_dummy_dev;
84
Mark Brownfb257892011-04-28 10:57:54 +010085int __init snd_soc_util_init(void)
Mark Brown848dd8b2011-04-27 18:16:32 +010086{
87 int ret;
88
89 soc_dummy_dev = platform_device_alloc("snd-soc-dummy", -1);
90 if (!soc_dummy_dev)
91 return -ENOMEM;
92
93 ret = platform_device_add(soc_dummy_dev);
94 if (ret != 0) {
95 platform_device_put(soc_dummy_dev);
96 return ret;
97 }
98
99 ret = platform_driver_register(&soc_dummy_driver);
100 if (ret != 0)
101 platform_device_unregister(soc_dummy_dev);
102
103 return ret;
104}
Mark Brown848dd8b2011-04-27 18:16:32 +0100105
Mark Brownfb257892011-04-28 10:57:54 +0100106void __exit snd_soc_util_exit(void)
Mark Brown848dd8b2011-04-27 18:16:32 +0100107{
108 platform_device_unregister(soc_dummy_dev);
109 platform_driver_unregister(&soc_dummy_driver);
110}