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/pcm_params.h>
  33
  34 #include <asm/blackfin.h>
  35 #include <asm/cacheflush.h>
  36 #include <asm/irq.h>
  37 #include <asm/dma.h>
  38 #include <asm/portmux.h>
  39
  40 #include "../codecs/ad193x.h"
  41
  42 #include "bf5xx-tdm-pcm.h"
  43 #include "bf5xx-tdm.h"
  44
  45 static struct snd_soc_card bf5xx_ad193x;
  46
  47 static int bf5xx_ad193x_hw_params(struct snd_pcm_substream *substream,
  48         struct snd_pcm_hw_params *params)
  49 {
  50         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  51         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  52         struct snd_soc_dai *codec_dai = rtd->codec_dai;
  53         unsigned int clk = 0;
  54         unsigned int channel_map[] = {0, 1, 2, 3, 4, 5, 6, 7};
  55         int ret = 0;
  56
  57         switch (params_rate(params)) {
  58         case 48000:
  59                 clk = 24576000;
  60                 break;
  61         }
  62
  63         /* set cpu DAI configuration */
  64         ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_DSP_A |
  65                 SND_SOC_DAIFMT_IB_IF | SND_SOC_DAIFMT_CBM_CFM);
  66         if (ret < 0)
  67                 return ret;
  68
  69         /* set codec DAI configuration */
  70         ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_DSP_A |
  71                 SND_SOC_DAIFMT_IB_IF | SND_SOC_DAIFMT_CBM_CFM);
  72         if (ret < 0)
  73                 return ret;
  74
  75         /* set the codec system clock for DAC and ADC */
  76         ret = snd_soc_dai_set_sysclk(codec_dai, 0, clk,
  77                 SND_SOC_CLOCK_IN);
  78         if (ret < 0)
  79                 return ret;
  80
  81         /* set codec DAI slots, 8 channels, all channels are enabled */
  82         ret = snd_soc_dai_set_tdm_slot(codec_dai, 0xFF, 0xFF, 8, 32);
  83         if (ret < 0)
  84                 return ret;
  85
  86         /* set cpu DAI channel mapping */
  87         ret = snd_soc_dai_set_channel_map(cpu_dai, ARRAY_SIZE(channel_map),
  88                 channel_map, ARRAY_SIZE(channel_map), channel_map);
  89         if (ret < 0)
  90                 return ret;
  91
  92         return 0;
  93 }
  94
  95 static struct snd_soc_ops bf5xx_ad193x_ops = {
  96         .hw_params = bf5xx_ad193x_hw_params,
  97 };
  98
  99 static struct snd_soc_dai_link bf5xx_ad193x_dai[] = {
 100         {
 101                 .name = "ad193x",
 102                 .stream_name = "AD193X",
 103                 .cpu_dai_name = "bfin-tdm.0",
 104                 .codec_dai_name ="ad193x-hifi",
 105                 .platform_name = "bfin-tdm-pcm-audio",
 106                 .codec_name = "spi0.5",
 107                 .ops = &bf5xx_ad193x_ops,
 108         },
 109         {
 110                 .name = "ad193x",
 111                 .stream_name = "AD193X",
 112                 .cpu_dai_name = "bfin-tdm.1",
 113                 .codec_dai_name ="ad193x-hifi",
 114                 .platform_name = "bfin-tdm-pcm-audio",
 115                 .codec_name = "spi0.5",
 116                 .ops = &bf5xx_ad193x_ops,
 117         },
 118 };
 119
 120 static struct snd_soc_card bf5xx_ad193x = {
 121         .name = "bfin-ad193x",
 122         .dai_link = &bf5xx_ad193x_dai[CONFIG_SND_BF5XX_SPORT_NUM],
 123         .num_links = 1,
 124 };
 125
 126 static struct platform_device *bfxx_ad193x_snd_device;
 127
 128 static int __init bf5xx_ad193x_init(void)
 129 {
 130         int ret;
 131
 132         bfxx_ad193x_snd_device = platform_device_alloc("soc-audio", -1);
 133         if (!bfxx_ad193x_snd_device)
 134                 return -ENOMEM;
 135
 136         platform_set_drvdata(bfxx_ad193x_snd_device, &bf5xx_ad193x);
 137         ret = platform_device_add(bfxx_ad193x_snd_device);
 138
 139         if (ret)
 140                 platform_device_put(bfxx_ad193x_snd_device);
 141
 142         return ret;
 143 }
 144
 145 static void __exit bf5xx_ad193x_exit(void)
 146 {
 147         platform_device_unregister(bfxx_ad193x_snd_device);
 148 }
 149
 150 module_init(bf5xx_ad193x_init);
 151 module_exit(bf5xx_ad193x_exit);
 152
 153 /* Module information */
 154 MODULE_AUTHOR("Barry Song");
 155 MODULE_DESCRIPTION("ALSA SoC AD193X board driver");
 156 MODULE_LICENSE("GPL");
 157