release/src-rt-6.x.4708/linux/linux-2.6.36/sound/soc/blackfin/bf5xx-ad193x.c

   1 /*
   2  * File:         sound/soc/blackfin/bf5xx-ad193x.c
   3  * Author:       Barry Song <Barry.Song@analog.com>
   4  *
   5  * Created:      Thur June 4 2009
   6  * Description:  Board driver for ad193x 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/ad193x.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_ad193x;
  48
  49 static int bf5xx_ad193x_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_ad193x_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         unsigned int channel_map[] = {0, 1, 2, 3, 4, 5, 6, 7};
  65         int ret = 0;
  66         /* set cpu DAI configuration */
  67         ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_DSP_A |
  68                 SND_SOC_DAIFMT_IB_IF | SND_SOC_DAIFMT_CBM_CFM);
  69         if (ret < 0)
  70                 return ret;
  71
  72         /* set codec DAI configuration */
  73         ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_DSP_A |
  74                 SND_SOC_DAIFMT_IB_IF | SND_SOC_DAIFMT_CBM_CFM);
  75         if (ret < 0)
  76                 return ret;
  77
  78         /* set codec DAI slots, 8 channels, all channels are enabled */
  79         ret = snd_soc_dai_set_tdm_slot(codec_dai, 0xFF, 0xFF, 8, 32);
  80         if (ret < 0)
  81                 return ret;
  82
  83         /* set cpu DAI channel mapping */
  84         ret = snd_soc_dai_set_channel_map(cpu_dai, ARRAY_SIZE(channel_map),
  85                 channel_map, ARRAY_SIZE(channel_map), channel_map);
  86         if (ret < 0)
  87                 return ret;
  88
  89         return 0;
  90 }
  91
  92 static struct snd_soc_ops bf5xx_ad193x_ops = {
  93         .startup = bf5xx_ad193x_startup,
  94         .hw_params = bf5xx_ad193x_hw_params,
  95 };
  96
  97 static struct snd_soc_dai_link bf5xx_ad193x_dai = {
  98         .name = "ad193x",
  99         .stream_name = "AD193X",
 100         .cpu_dai = &bf5xx_tdm_dai,
 101         .codec_dai = &ad193x_dai,
 102         .ops = &bf5xx_ad193x_ops,
 103 };
 104
 105 static struct snd_soc_card bf5xx_ad193x = {
 106         .name = "bf5xx_ad193x",
 107         .platform = &bf5xx_tdm_soc_platform,
 108         .dai_link = &bf5xx_ad193x_dai,
 109         .num_links = 1,
 110 };
 111
 112 static struct snd_soc_device bf5xx_ad193x_snd_devdata = {
 113         .card = &bf5xx_ad193x,
 114         .codec_dev = &soc_codec_dev_ad193x,
 115 };
 116
 117 static struct platform_device *bfxx_ad193x_snd_device;
 118
 119 static int __init bf5xx_ad193x_init(void)
 120 {
 121         int ret;
 122
 123         bfxx_ad193x_snd_device = platform_device_alloc("soc-audio", -1);
 124         if (!bfxx_ad193x_snd_device)
 125                 return -ENOMEM;
 126
 127         platform_set_drvdata(bfxx_ad193x_snd_device, &bf5xx_ad193x_snd_devdata);
 128         bf5xx_ad193x_snd_devdata.dev = &bfxx_ad193x_snd_device->dev;
 129         ret = platform_device_add(bfxx_ad193x_snd_device);
 130
 131         if (ret)
 132                 platform_device_put(bfxx_ad193x_snd_device);
 133
 134         return ret;
 135 }
 136
 137 static void __exit bf5xx_ad193x_exit(void)
 138 {
 139         platform_device_unregister(bfxx_ad193x_snd_device);
 140 }
 141
 142 module_init(bf5xx_ad193x_init);
 143 module_exit(bf5xx_ad193x_exit);
 144
 145 /* Module information */
 146 MODULE_AUTHOR("Barry Song");
 147 MODULE_DESCRIPTION("ALSA SoC AD193X board driver");
 148 MODULE_LICENSE("GPL");