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_startup(struct snd_pcm_substream *substream)
  48 {
  49         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  50         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  51
  52         pr_debug("%s enter\n", __func__);
  53         snd_soc_dai_set_drvdata(cpu_dai, sport_handle);
  54         return 0;
  55 }
  56
  57 static int bf5xx_ssm2602_hw_params(struct snd_pcm_substream *substream,
  58         struct snd_pcm_hw_params *params)
  59 {
  60         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  61         struct snd_soc_dai *codec_dai = rtd->codec_dai;
  62         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  63         unsigned int clk = 0;
  64         int ret = 0;
  65
  66         pr_debug("%s rate %d format %x\n", __func__, params_rate(params),
  67                 params_format(params));
  68         /*
  69          * If you are using a crystal source which frequency is not 12MHz
  70          * then modify the below case statement with frequency of the crystal.
  71          *
  72          * If you are using the SPORT to generate clocking then this is
  73          * where to do it.
  74          */
  75
  76         switch (params_rate(params)) {
  77         case 8000:
  78         case 16000:
  79         case 48000:
  80         case 96000:
  81         case 11025:
  82         case 22050:
  83         case 44100:
  84                 clk = 12000000;
  85                 break;
  86         }
  87
  88         /*
  89          * CODEC is master for BCLK and LRC in this configuration.
  90          */
  91
  92         /* set codec DAI configuration */
  93         ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
  94                 SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM);
  95         if (ret < 0)
  96                 return ret;
  97         /* set cpu DAI configuration */
  98         ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
  99                 SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM);
 100         if (ret < 0)
 101                 return ret;
 102
 103         ret = snd_soc_dai_set_sysclk(codec_dai, SSM2602_SYSCLK, clk,
 104                 SND_SOC_CLOCK_IN);
 105         if (ret < 0)
 106                 return ret;
 107
 108         return 0;
 109 }
 110
 111 static struct snd_soc_ops bf5xx_ssm2602_ops = {
 112         .startup = bf5xx_ssm2602_startup,
 113         .hw_params = bf5xx_ssm2602_hw_params,
 114 };
 115
 116 static struct snd_soc_dai_link bf5xx_ssm2602_dai = {
 117         .name = "ssm2602",
 118         .stream_name = "SSM2602",
 119         .cpu_dai_name = "bf5xx-i2s",
 120         .codec_dai_name = "ssm2602-hifi",
 121         .platform_name = "bf5xx-pcm-audio",
 122         .codec_name = "ssm2602-codec.0-001b",
 123         .ops = &bf5xx_ssm2602_ops,
 124 };
 125
 126 static struct snd_soc_card bf5xx_ssm2602 = {
 127         .name = "bf5xx_ssm2602",
 128         .dai_link = &bf5xx_ssm2602_dai,
 129         .num_links = 1,
 130 };
 131
 132 static struct platform_device *bf5xx_ssm2602_snd_device;
 133
 134 static int __init bf5xx_ssm2602_init(void)
 135 {
 136         int ret;
 137
 138         pr_debug("%s enter\n", __func__);
 139         bf5xx_ssm2602_snd_device = platform_device_alloc("soc-audio", -1);
 140         if (!bf5xx_ssm2602_snd_device)
 141                 return -ENOMEM;
 142
 143         platform_set_drvdata(bf5xx_ssm2602_snd_device, &bf5xx_ssm2602);
 144         ret = platform_device_add(bf5xx_ssm2602_snd_device);
 145
 146         if (ret)
 147                 platform_device_put(bf5xx_ssm2602_snd_device);
 148
 149         return ret;
 150 }
 151
 152 static void __exit bf5xx_ssm2602_exit(void)
 153 {
 154         pr_debug("%s enter\n", __func__);
 155         platform_device_unregister(bf5xx_ssm2602_snd_device);
 156 }
 157
 158 module_init(bf5xx_ssm2602_init);
 159 module_exit(bf5xx_ssm2602_exit);
 160
 161 /* Module information */
 162 MODULE_AUTHOR("Cliff Cai");
 163 MODULE_DESCRIPTION("ALSA SoC SSM2602 BF527-EZKIT");
 164 MODULE_LICENSE("GPL");
 165