sound/soc/mxs/mxs-sgtl5000.c

   1 /*
   2  * Copyright 2011 Freescale Semiconductor, Inc.
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along
  15  * with this program; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  17  */
  18
  19 #include <linux/module.h>
  20 #include <linux/device.h>
  21 #include <sound/core.h>
  22 #include <sound/pcm.h>
  23 #include <sound/soc.h>
  24 #include <sound/jack.h>
  25 #include <sound/soc-dapm.h>
  26 #include <asm/mach-types.h>
  27
  28 #include "../codecs/sgtl5000.h"
  29 #include "mxs-saif.h"
  30
  31 static int mxs_sgtl5000_hw_params(struct snd_pcm_substream *substream,
  32         struct snd_pcm_hw_params *params)
  33 {
  34         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  35         struct snd_soc_dai *codec_dai = rtd->codec_dai;
  36         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  37         unsigned int rate = params_rate(params);
  38         u32 dai_format, mclk;
  39         int ret;
  40
  41         /* sgtl5000 does not support 512*rate when in 96000 fs */
  42         switch (rate) {
  43         case 96000:
  44                 mclk = 256 * rate;
  45                 break;
  46         default:
  47                 mclk = 512 * rate;
  48                 break;
  49         }
  50
  51         /* Sgtl5000 sysclk should be >= 8MHz and <= 27M */
  52         if (mclk < 8000000 || mclk > 27000000)
  53                 return -EINVAL;
  54
  55         /* Set SGTL5000's SYSCLK (provided by SAIF MCLK) */
  56         ret = snd_soc_dai_set_sysclk(codec_dai, SGTL5000_SYSCLK, mclk, 0);
  57         if (ret)
  58                 return ret;
  59
  60         /* The SAIF MCLK should be the same as SGTL5000_SYSCLK */
  61         ret = snd_soc_dai_set_sysclk(cpu_dai, MXS_SAIF_MCLK, mclk, 0);
  62         if (ret)
  63                 return ret;
  64
  65         /* set codec to slave mode */
  66         dai_format = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
  67                         SND_SOC_DAIFMT_CBS_CFS;
  68
  69         /* set codec DAI configuration */
  70         ret = snd_soc_dai_set_fmt(codec_dai, dai_format);
  71         if (ret)
  72                 return ret;
  73
  74         /* set cpu DAI configuration */
  75         ret = snd_soc_dai_set_fmt(cpu_dai, dai_format);
  76         if (ret)
  77                 return ret;
  78
  79         return 0;
  80 }
  81
  82 static struct snd_soc_ops mxs_sgtl5000_hifi_ops = {
  83         .hw_params = mxs_sgtl5000_hw_params,
  84 };
  85
  86 static struct snd_soc_dai_link mxs_sgtl5000_dai[] = {
  87         {
  88                 .name           = "HiFi Tx",
  89                 .stream_name    = "HiFi Playback",
  90                 .codec_dai_name = "sgtl5000",
  91                 .codec_name     = "sgtl5000.0-000a",
  92                 .cpu_dai_name   = "mxs-saif.0",
  93                 .platform_name  = "mxs-pcm-audio.0",
  94                 .ops            = &mxs_sgtl5000_hifi_ops,
  95         }, {
  96                 .name           = "HiFi Rx",
  97                 .stream_name    = "HiFi Capture",
  98                 .codec_dai_name = "sgtl5000",
  99                 .codec_name     = "sgtl5000.0-000a",
 100                 .cpu_dai_name   = "mxs-saif.1",
 101                 .platform_name  = "mxs-pcm-audio.1",
 102                 .ops            = &mxs_sgtl5000_hifi_ops,
 103         },
 104 };
 105
 106 static struct snd_soc_card mxs_sgtl5000 = {
 107         .name           = "mxs_sgtl5000",
 108         .dai_link       = mxs_sgtl5000_dai,
 109         .num_links      = ARRAY_SIZE(mxs_sgtl5000_dai),
 110 };
 111
 112 static int __devinit mxs_sgtl5000_probe(struct platform_device *pdev)
 113 {
 114         struct snd_soc_card *card = &mxs_sgtl5000;
 115         int ret;
 116
 117         /*
 118          * Set an init clock(11.28Mhz) for sgtl5000 initialization(i2c r/w).
 119          * The Sgtl5000 sysclk is derived from saif0 mclk and it's range
 120          * should be >= 8MHz and <= 27M.
 121          */
 122         ret = mxs_saif_get_mclk(0, 44100 * 256, 44100);
 123         if (ret)
 124                 return ret;
 125
 126         card->dev = &pdev->dev;
 127         platform_set_drvdata(pdev, card);
 128
 129         ret = snd_soc_register_card(card);
 130         if (ret) {
 131                 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
 132                         ret);
 133                 return ret;
 134         }
 135
 136         return 0;
 137 }
 138
 139 static int __devexit mxs_sgtl5000_remove(struct platform_device *pdev)
 140 {
 141         struct snd_soc_card *card = platform_get_drvdata(pdev);
 142
 143         mxs_saif_put_mclk(0);
 144
 145         snd_soc_unregister_card(card);
 146
 147         return 0;
 148 }
 149
 150 static struct platform_driver mxs_sgtl5000_audio_driver = {
 151         .driver = {
 152                 .name = "mxs-sgtl5000",
 153                 .owner = THIS_MODULE,
 154         },
 155         .probe = mxs_sgtl5000_probe,
 156         .remove = __devexit_p(mxs_sgtl5000_remove),
 157 };
 158
 159 static int __init mxs_sgtl5000_init(void)
 160 {
 161         return platform_driver_register(&mxs_sgtl5000_audio_driver);
 162 }
 163 module_init(mxs_sgtl5000_init);
 164
 165 static void __exit mxs_sgtl5000_exit(void)
 166 {
 167         platform_driver_unregister(&mxs_sgtl5000_audio_driver);
 168 }
 169 module_exit(mxs_sgtl5000_exit);
 170
 171 MODULE_AUTHOR("Freescale Semiconductor, Inc.");
 172 MODULE_DESCRIPTION("MXS ALSA SoC Machine driver");
 173 MODULE_LICENSE("GPL");
 174 MODULE_ALIAS("platform:mxs-sgtl5000");