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 #include "bf5xx-i2s.h"
  46
  47 static struct snd_soc_card bf5xx_ssm2602;
  48
  49 static int bf5xx_ssm2602_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         pr_debug("%s enter\n", __func__);
  55         cpu_dai->private_data = sport_handle;
  56         return 0;
  57 }
  58
  59 static int bf5xx_ssm2602_hw_params(struct snd_pcm_substream *substream,
  60         struct snd_pcm_hw_params *params)
  61 {
  62         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  63         struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
  64         struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
  65         unsigned int clk = 0;
  66         int ret = 0;
  67
  68         pr_debug("%s rate %d format %x\n", __func__, params_rate(params),
  69                 params_format(params));
  70         /*
  71          * If you are using a crystal source which frequency is not 12MHz
  72          * then modify the below case statement with frequency of the crystal.
  73          *
  74          * If you are using the SPORT to generate clocking then this is
  75          * where to do it.
  76          */
  77
  78         switch (params_rate(params)) {
  79         case 8000:
  80         case 16000:
  81         case 48000:
  82         case 96000:
  83         case 11025:
  84         case 22050:
  85         case 44100:
  86                 clk = 12000000;
  87                 break;
  88         }
  89
  90         /*
  91          * CODEC is master for BCLK and LRC in this configuration.
  92          */
  93
  94         /* set codec DAI configuration */
  95         ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
  96                 SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM);
  97         if (ret < 0)
  98                 return ret;
  99         /* set cpu DAI configuration */
 100         ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
 101                 SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM);
 102         if (ret < 0)
 103                 return ret;
 104
 105         ret = snd_soc_dai_set_sysclk(codec_dai, SSM2602_SYSCLK, clk,
 106                 SND_SOC_CLOCK_IN);
 107         if (ret < 0)
 108                 return ret;
 109
 110         return 0;
 111 }
 112
 113 static struct snd_soc_ops bf5xx_ssm2602_ops = {
 114         .startup = bf5xx_ssm2602_startup,
 115         .hw_params = bf5xx_ssm2602_hw_params,
 116 };
 117
 118 static struct snd_soc_dai_link bf5xx_ssm2602_dai = {
 119         .name = "ssm2602",
 120         .stream_name = "SSM2602",
 121         .cpu_dai = &bf5xx_i2s_dai,
 122         .codec_dai = &ssm2602_dai,
 123         .ops = &bf5xx_ssm2602_ops,
 124 };
 125
 126 /*
 127  * SSM2602 2 wire address is determined by CSB
 128  * state during powerup.
 129  *    low  = 0x1a
 130  *    high = 0x1b
 131  */
 132
 133 static struct ssm2602_setup_data bf5xx_ssm2602_setup = {
 134         .i2c_bus = 0,
 135         .i2c_address = 0x1b,
 136 };
 137
 138 static struct snd_soc_card bf5xx_ssm2602 = {
 139         .name = "bf5xx_ssm2602",
 140         .platform = &bf5xx_i2s_soc_platform,
 141         .dai_link = &bf5xx_ssm2602_dai,
 142         .num_links = 1,
 143 };
 144
 145 static struct snd_soc_device bf5xx_ssm2602_snd_devdata = {
 146         .card = &bf5xx_ssm2602,
 147         .codec_dev = &soc_codec_dev_ssm2602,
 148         .codec_data = &bf5xx_ssm2602_setup,
 149 };
 150
 151 static struct platform_device *bf52x_ssm2602_snd_device;
 152
 153 static int __init bf5xx_ssm2602_init(void)
 154 {
 155         int ret;
 156
 157         pr_debug("%s enter\n", __func__);
 158         bf52x_ssm2602_snd_device = platform_device_alloc("soc-audio", -1);
 159         if (!bf52x_ssm2602_snd_device)
 160                 return -ENOMEM;
 161
 162         platform_set_drvdata(bf52x_ssm2602_snd_device,
 163                                 &bf5xx_ssm2602_snd_devdata);
 164         bf5xx_ssm2602_snd_devdata.dev = &bf52x_ssm2602_snd_device->dev;
 165         ret = platform_device_add(bf52x_ssm2602_snd_device);
 166
 167         if (ret)
 168                 platform_device_put(bf52x_ssm2602_snd_device);
 169
 170         return ret;
 171 }
 172
 173 static void __exit bf5xx_ssm2602_exit(void)
 174 {
 175         pr_debug("%s enter\n", __func__);
 176         platform_device_unregister(bf52x_ssm2602_snd_device);
 177 }
 178
 179 module_init(bf5xx_ssm2602_init);
 180 module_exit(bf5xx_ssm2602_exit);
 181
 182 /* Module information */
 183 MODULE_AUTHOR("Cliff Cai");
 184 MODULE_DESCRIPTION("ALSA SoC SSM2602 BF527-EZKIT");
 185 MODULE_LICENSE("GPL");
 186