sound/soc/blackfin/bf5xx-ssm2602.c

   1 /*
   2  * File:         sound/soc/blackfin/bf5xx-ssm2602.c
   3  * Author:       Cliff Cai <Cliff.Cai@analog.com>
   4  *
   5  * Created:      Tue June 06 2008
   6  * Description:  board driver for SSM2602 sound chip
   7  *
   8  * Modified:
   9  *               Copyright 2008 Analog Devices Inc.
  10  *
  11  * Bugs:         Enter bugs at http://blackfin.uclinux.org/
  12  *
  13  * This program is free software; you can redistribute it and/or modify
  14  * it under the terms of the GNU General Public License as published by
  15  * the Free Software Foundation; either version 2 of the License, or
  16  * (at your option) any later version.
  17  *
  18  * This program is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU General Public License for more details.
  22  *
  23  * You should have received a copy of the GNU General Public License
  24  * along with this program; if not, see the file COPYING, or write
  25  * to the Free Software Foundation, Inc.,
  26  * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  27  */
  28
  29 #include <linux/module.h>
  30 #include <linux/moduleparam.h>
  31 #include <linux/device.h>
  32
  33 #include <sound/core.h>
  34 #include <sound/pcm.h>
  35 #include <sound/soc.h>
  36 #include <sound/pcm_params.h>
  37
  38 #include <asm/dma.h>
  39 #include <asm/portmux.h>
  40 #include <linux/gpio.h>
  41 #include "../codecs/ssm2602.h"
  42 #include "bf5xx-sport.h"
  43 #include "bf5xx-i2s-pcm.h"
  44
  45 static struct snd_soc_card bf5xx_ssm2602;
  46
  47 static int bf5xx_ssm2602_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 *codec_dai = rtd->codec_dai;
  52         unsigned int clk = 0;
  53         int ret = 0;
  54
  55         pr_debug("%s rate %d format %x\n", __func__, params_rate(params),
  56                 params_format(params));
  57         /*
  58          * If you are using a crystal source which frequency is not 12MHz
  59          * then modify the below case statement with frequency of the crystal.
  60          *
  61          * If you are using the SPORT to generate clocking then this is
  62          * where to do it.
  63          */
  64
  65         switch (params_rate(params)) {
  66         case 8000:
  67         case 16000:
  68         case 48000:
  69         case 96000:
  70         case 11025:
  71         case 22050:
  72         case 44100:
  73                 clk = 12000000;
  74                 break;
  75         }
  76
  77         ret = snd_soc_dai_set_sysclk(codec_dai, SSM2602_SYSCLK, clk,
  78                 SND_SOC_CLOCK_IN);
  79         if (ret < 0)
  80                 return ret;
  81
  82         return 0;
  83 }
  84
  85 static struct snd_soc_ops bf5xx_ssm2602_ops = {
  86         .hw_params = bf5xx_ssm2602_hw_params,
  87 };
  88
  89 /* CODEC is master for BCLK and LRC in this configuration. */
  90 #define BF5XX_SSM2602_DAIFMT (SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | \
  91                                 SND_SOC_DAIFMT_CBM_CFM)
  92
  93 static struct snd_soc_dai_link bf5xx_ssm2602_dai[] = {
  94         {
  95                 .name = "ssm2602",
  96                 .stream_name = "SSM2602",
  97                 .cpu_dai_name = "bfin-i2s.0",
  98                 .codec_dai_name = "ssm2602-hifi",
  99                 .platform_name = "bfin-i2s-pcm-audio",
 100                 .codec_name = "ssm2602.0-001b",
 101                 .ops = &bf5xx_ssm2602_ops,
 102         },
 103         {
 104                 .name = "ssm2602",
 105                 .stream_name = "SSM2602",
 106                 .cpu_dai_name = "bfin-i2s.1",
 107                 .codec_dai_name = "ssm2602-hifi",
 108                 .platform_name = "bfin-i2s-pcm-audio",
 109                 .codec_name = "ssm2602.0-001b",
 110                 .ops = &bf5xx_ssm2602_ops,
 111         },
 112 };
 113
 114 static struct snd_soc_card bf5xx_ssm2602 = {
 115         .name = "bfin-ssm2602",
 116         .owner = THIS_MODULE,
 117         .dai_link = &bf5xx_ssm2602_dai[CONFIG_SND_BF5XX_SPORT_NUM],
 118         .num_links = 1,
 119 };
 120
 121 static struct platform_device *bf5xx_ssm2602_snd_device;
 122
 123 static int __init bf5xx_ssm2602_init(void)
 124 {
 125         int ret;
 126
 127         pr_debug("%s enter\n", __func__);
 128         bf5xx_ssm2602_snd_device = platform_device_alloc("soc-audio", -1);
 129         if (!bf5xx_ssm2602_snd_device)
 130                 return -ENOMEM;
 131
 132         platform_set_drvdata(bf5xx_ssm2602_snd_device, &bf5xx_ssm2602);
 133         ret = platform_device_add(bf5xx_ssm2602_snd_device);
 134
 135         if (ret)
 136                 platform_device_put(bf5xx_ssm2602_snd_device);
 137
 138         return ret;
 139 }
 140
 141 static void __exit bf5xx_ssm2602_exit(void)
 142 {
 143         pr_debug("%s enter\n", __func__);
 144         platform_device_unregister(bf5xx_ssm2602_snd_device);
 145 }
 146
 147 module_init(bf5xx_ssm2602_init);
 148 module_exit(bf5xx_ssm2602_exit);
 149
 150 /* Module information */
 151 MODULE_AUTHOR("Cliff Cai");
 152 MODULE_DESCRIPTION("ALSA SoC SSM2602 BF527-EZKIT");
 153 MODULE_LICENSE("GPL");
 154