sound/soc/blackfin/bf5xx-ad1938.c

   1 /*
   2  * File:         sound/soc/blackfin/bf5xx-ad1938.c
   3  * Author:       Barry Song <Barry.Song@analog.com>
   4  *
   5  * Created:      Thur June 4 2009
   6  * Description:  Board driver for ad1938 sound chip
   7  *
   8  * Bugs:         Enter bugs at http://blackfin.uclinux.org/
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, see the file COPYING, or write
  22  * to the Free Software Foundation, Inc.,
  23  * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  24  */
  25
  26 #include <linux/module.h>
  27 #include <linux/moduleparam.h>
  28 #include <linux/device.h>
  29 #include <sound/core.h>
  30 #include <sound/pcm.h>
  31 #include <sound/soc.h>
  32 #include <sound/soc-dapm.h>
  33 #include <sound/pcm_params.h>
  34
  35 #include <asm/blackfin.h>
  36 #include <asm/cacheflush.h>
  37 #include <asm/irq.h>
  38 #include <asm/dma.h>
  39 #include <asm/portmux.h>
  40
  41 #include "../codecs/ad1938.h"
  42 #include "bf5xx-sport.h"
  43
  44 #include "bf5xx-tdm-pcm.h"
  45 #include "bf5xx-tdm.h"
  46
  47 static struct snd_soc_card bf5xx_ad1938;
  48
  49 static int bf5xx_ad1938_startup(struct snd_pcm_substream *substream)
  50 {
  51         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  52         struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
  53
  54         cpu_dai->private_data = sport_handle;
  55         return 0;
  56 }
  57
  58 static int bf5xx_ad1938_hw_params(struct snd_pcm_substream *substream,
  59         struct snd_pcm_hw_params *params)
  60 {
  61         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  62         struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
  63         struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
  64         int ret = 0;
  65         /* set cpu DAI configuration */
  66         ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_DSP_A |
  67                 SND_SOC_DAIFMT_IB_IF | SND_SOC_DAIFMT_CBM_CFM);
  68         if (ret < 0)
  69                 return ret;
  70
  71         /* set codec DAI configuration */
  72         ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_DSP_A |
  73                 SND_SOC_DAIFMT_IB_IF | SND_SOC_DAIFMT_CBM_CFM);
  74         if (ret < 0)
  75                 return ret;
  76
  77         /* set codec DAI slots, 8 channels, all channels are enabled */
  78         ret = snd_soc_dai_set_tdm_slot(codec_dai, 0xFF, 8);
  79         if (ret < 0)
  80                 return ret;
  81
  82         return 0;
  83 }
  84
  85 static struct snd_soc_ops bf5xx_ad1938_ops = {
  86         .startup = bf5xx_ad1938_startup,
  87         .hw_params = bf5xx_ad1938_hw_params,
  88 };
  89
  90 static struct snd_soc_dai_link bf5xx_ad1938_dai = {
  91         .name = "ad1938",
  92         .stream_name = "AD1938",
  93         .cpu_dai = &bf5xx_tdm_dai,
  94         .codec_dai = &ad1938_dai,
  95         .ops = &bf5xx_ad1938_ops,
  96 };
  97
  98 static struct snd_soc_card bf5xx_ad1938 = {
  99         .name = "bf5xx_ad1938",
 100         .platform = &bf5xx_tdm_soc_platform,
 101         .dai_link = &bf5xx_ad1938_dai,
 102         .num_links = 1,
 103 };
 104
 105 static struct snd_soc_device bf5xx_ad1938_snd_devdata = {
 106         .card = &bf5xx_ad1938,
 107         .codec_dev = &soc_codec_dev_ad1938,
 108 };
 109
 110 static struct platform_device *bfxx_ad1938_snd_device;
 111
 112 static int __init bf5xx_ad1938_init(void)
 113 {
 114         int ret;
 115
 116         bfxx_ad1938_snd_device = platform_device_alloc("soc-audio", -1);
 117         if (!bfxx_ad1938_snd_device)
 118                 return -ENOMEM;
 119
 120         platform_set_drvdata(bfxx_ad1938_snd_device, &bf5xx_ad1938_snd_devdata);
 121         bf5xx_ad1938_snd_devdata.dev = &bfxx_ad1938_snd_device->dev;
 122         ret = platform_device_add(bfxx_ad1938_snd_device);
 123
 124         if (ret)
 125                 platform_device_put(bfxx_ad1938_snd_device);
 126
 127         return ret;
 128 }
 129
 130 static void __exit bf5xx_ad1938_exit(void)
 131 {
 132         platform_device_unregister(bfxx_ad1938_snd_device);
 133 }
 134
 135 module_init(bf5xx_ad1938_init);
 136 module_exit(bf5xx_ad1938_exit);
 137
 138 /* Module information */
 139 MODULE_AUTHOR("Barry Song");
 140 MODULE_DESCRIPTION("ALSA SoC AD1938 board driver");
 141 MODULE_LICENSE("GPL");
 142