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/soc-dapm.h>
  37 #include <sound/pcm_params.h>
  38
  39 #include <asm/dma.h>
  40 #include <asm/portmux.h>
  41 #include <linux/gpio.h>
  42 #include "../codecs/ssm2602.h"
  43 #include "bf5xx-sport.h"
  44 #include "bf5xx-i2s-pcm.h"
  45
  46 static struct snd_soc_card bf5xx_ssm2602;
  47
  48 static int bf5xx_ssm2602_startup(struct snd_pcm_substream *substream)
  49 {
  50         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  51         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  52
  53         pr_debug("%s enter\n", __func__);
  54         snd_soc_dai_set_drvdata(cpu_dai, sport_handle);
  55         return 0;
  56 }
  57
  58 static int bf5xx_ssm2602_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 *codec_dai = rtd->codec_dai;
  63         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  64         unsigned int clk = 0;
  65         int ret = 0;
  66
  67         pr_debug("%s rate %d format %x\n", __func__, params_rate(params),
  68                 params_format(params));
  69         /*
  70          * If you are using a crystal source which frequency is not 12MHz
  71          * then modify the below case statement with frequency of the crystal.
  72          *
  73          * If you are using the SPORT to generate clocking then this is
  74          * where to do it.
  75          */
  76
  77         switch (params_rate(params)) {
  78         case 8000:
  79         case 16000:
  80         case 48000:
  81         case 96000:
  82         case 11025:
  83         case 22050:
  84         case 44100:
  85                 clk = 12000000;
  86                 break;
  87         }
  88
  89         /*
  90          * CODEC is master for BCLK and LRC in this configuration.
  91          */
  92
  93         /* set codec DAI configuration */
  94         ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
  95                 SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM);
  96         if (ret < 0)
  97                 return ret;
  98         /* set cpu DAI configuration */
  99         ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
 100                 SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM);
 101         if (ret < 0)
 102                 return ret;
 103
 104         ret = snd_soc_dai_set_sysclk(codec_dai, SSM2602_SYSCLK, clk,
 105                 SND_SOC_CLOCK_IN);
 106         if (ret < 0)
 107                 return ret;
 108
 109         return 0;
 110 }
 111
 112 static struct snd_soc_ops bf5xx_ssm2602_ops = {
 113         .startup = bf5xx_ssm2602_startup,
 114         .hw_params = bf5xx_ssm2602_hw_params,
 115 };
 116
 117 static struct snd_soc_dai_link bf5xx_ssm2602_dai = {
 118         .name = "ssm2602",
 119         .stream_name = "SSM2602",
 120         .cpu_dai_name = "bf5xx-i2s",
 121         .codec_dai_name = "ssm2602-hifi",
 122         .platform_name = "bf5xx-pcm-audio",
 123         .codec_name = "ssm2602-codec.0-0x1b",
 124         .ops = &bf5xx_ssm2602_ops,
 125 };
 126
 127 static struct snd_soc_card bf5xx_ssm2602 = {
 128         .name = "bf5xx_ssm2602",
 129         .dai_link = &bf5xx_ssm2602_dai,
 130         .num_links = 1,
 131 };
 132
 133 static struct platform_device *bf5xx_ssm2602_snd_device;
 134
 135 static int __init bf5xx_ssm2602_init(void)
 136 {
 137         int ret;
 138
 139         pr_debug("%s enter\n", __func__);
 140         bf5xx_ssm2602_snd_device = platform_device_alloc("soc-audio", -1);
 141         if (!bf5xx_ssm2602_snd_device)
 142                 return -ENOMEM;
 143
 144         platform_set_drvdata(bf5xx_ssm2602_snd_device, &bf5xx_ssm2602);
 145         ret = platform_device_add(bf5xx_ssm2602_snd_device);
 146
 147         if (ret)
 148                 platform_device_put(bf5xx_ssm2602_snd_device);
 149
 150         return ret;
 151 }
 152
 153 static void __exit bf5xx_ssm2602_exit(void)
 154 {
 155         pr_debug("%s enter\n", __func__);
 156         platform_device_unregister(bf5xx_ssm2602_snd_device);
 157 }
 158
 159 module_init(bf5xx_ssm2602_init);
 160 module_exit(bf5xx_ssm2602_exit);
 161
 162 /* Module information */
 163 MODULE_AUTHOR("Cliff Cai");
 164 MODULE_DESCRIPTION("ALSA SoC SSM2602 BF527-EZKIT");
 165 MODULE_LICENSE("GPL");
 166