x86/xen: resume timer irqs early
[linux/fpc-iii.git] / sound / soc / cirrus / edb93xx.c
blobc43fb214558a78f4bfef1c51ba316e860e3f3e13
1 /*
2 * SoC audio for EDB93xx
4 * Copyright (c) 2010 Alexander Sverdlin <subaparts@yandex.ru>
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version 2
9 * of the License, or (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * This driver support CS4271 codec being master or slave, working
17 * in control port mode, connected either via SPI or I2C.
18 * The data format accepted is I2S or left-justified.
19 * DAPM support not implemented.
22 #include <linux/platform_device.h>
23 #include <linux/gpio.h>
24 #include <linux/module.h>
25 #include <sound/core.h>
26 #include <sound/pcm.h>
27 #include <sound/soc.h>
28 #include <asm/mach-types.h>
29 #include <mach/hardware.h>
31 static int edb93xx_hw_params(struct snd_pcm_substream *substream,
32 struct snd_pcm_hw_params *params)
34 struct snd_soc_pcm_runtime *rtd = substream->private_data;
35 struct snd_soc_dai *codec_dai = rtd->codec_dai;
36 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
37 int err;
38 unsigned int mclk_rate;
39 unsigned int rate = params_rate(params);
42 * According to CS4271 datasheet we use MCLK/LRCK=256 for
43 * rates below 50kHz and 128 for higher sample rates
45 if (rate < 50000)
46 mclk_rate = rate * 64 * 4;
47 else
48 mclk_rate = rate * 64 * 2;
50 err = snd_soc_dai_set_sysclk(codec_dai, 0, mclk_rate,
51 SND_SOC_CLOCK_IN);
52 if (err)
53 return err;
55 return snd_soc_dai_set_sysclk(cpu_dai, 0, mclk_rate,
56 SND_SOC_CLOCK_OUT);
59 static struct snd_soc_ops edb93xx_ops = {
60 .hw_params = edb93xx_hw_params,
63 static struct snd_soc_dai_link edb93xx_dai = {
64 .name = "CS4271",
65 .stream_name = "CS4271 HiFi",
66 .platform_name = "ep93xx-pcm-audio",
67 .cpu_dai_name = "ep93xx-i2s",
68 .codec_name = "spi0.0",
69 .codec_dai_name = "cs4271-hifi",
70 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_IF |
71 SND_SOC_DAIFMT_CBS_CFS,
72 .ops = &edb93xx_ops,
75 static struct snd_soc_card snd_soc_edb93xx = {
76 .name = "EDB93XX",
77 .owner = THIS_MODULE,
78 .dai_link = &edb93xx_dai,
79 .num_links = 1,
82 static int edb93xx_probe(struct platform_device *pdev)
84 struct snd_soc_card *card = &snd_soc_edb93xx;
85 int ret;
87 ret = ep93xx_i2s_acquire();
88 if (ret)
89 return ret;
91 card->dev = &pdev->dev;
93 ret = snd_soc_register_card(card);
94 if (ret) {
95 dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
96 ret);
97 ep93xx_i2s_release();
100 return ret;
103 static int edb93xx_remove(struct platform_device *pdev)
105 struct snd_soc_card *card = platform_get_drvdata(pdev);
107 snd_soc_unregister_card(card);
108 ep93xx_i2s_release();
110 return 0;
113 static struct platform_driver edb93xx_driver = {
114 .driver = {
115 .name = "edb93xx-audio",
116 .owner = THIS_MODULE,
118 .probe = edb93xx_probe,
119 .remove = edb93xx_remove,
122 module_platform_driver(edb93xx_driver);
124 MODULE_AUTHOR("Alexander Sverdlin <subaparts@yandex.ru>");
125 MODULE_DESCRIPTION("ALSA SoC EDB93xx");
126 MODULE_LICENSE("GPL");
127 MODULE_ALIAS("platform:edb93xx-audio");