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 <linux/of.h>
  22 #include <linux/of_device.h>
  23 #include <sound/core.h>
  24 #include <sound/pcm.h>
  25 #include <sound/soc.h>
  26 #include <sound/jack.h>
  27 #include <sound/soc-dapm.h>
  28 #include <asm/mach-types.h>
  29
  30 #include "../codecs/sgtl5000.h"
  31 #include "mxs-saif.h"
  32
  33 static int mxs_sgtl5000_hw_params(struct snd_pcm_substream *substream,
  34         struct snd_pcm_hw_params *params)
  35 {
  36         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  37         struct snd_soc_dai *codec_dai = rtd->codec_dai;
  38         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  39         unsigned int rate = params_rate(params);
  40         u32 dai_format, mclk;
  41         int ret;
  42
  43         /* sgtl5000 does not support 512*rate when in 96000 fs */
  44         switch (rate) {
  45         case 96000:
  46                 mclk = 256 * rate;
  47                 break;
  48         default:
  49                 mclk = 512 * rate;
  50                 break;
  51         }
  52
  53         /* Sgtl5000 sysclk should be >= 8MHz and <= 27M */
  54         if (mclk < 8000000 || mclk > 27000000)
  55                 return -EINVAL;
  56
  57         /* Set SGTL5000's SYSCLK (provided by SAIF MCLK) */
  58         ret = snd_soc_dai_set_sysclk(codec_dai, SGTL5000_SYSCLK, mclk, 0);
  59         if (ret)
  60                 return ret;
  61
  62         /* The SAIF MCLK should be the same as SGTL5000_SYSCLK */
  63         ret = snd_soc_dai_set_sysclk(cpu_dai, MXS_SAIF_MCLK, mclk, 0);
  64         if (ret)
  65                 return ret;
  66
  67         /* set codec to slave mode */
  68         dai_format = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
  69                         SND_SOC_DAIFMT_CBS_CFS;
  70
  71         /* set codec DAI configuration */
  72         ret = snd_soc_dai_set_fmt(codec_dai, dai_format);
  73         if (ret)
  74                 return ret;
  75
  76         /* set cpu DAI configuration */
  77         ret = snd_soc_dai_set_fmt(cpu_dai, dai_format);
  78         if (ret)
  79                 return ret;
  80
  81         return 0;
  82 }
  83
  84 static struct snd_soc_ops mxs_sgtl5000_hifi_ops = {
  85         .hw_params = mxs_sgtl5000_hw_params,
  86 };
  87
  88 static struct snd_soc_dai_link mxs_sgtl5000_dai[] = {
  89         {
  90                 .name           = "HiFi Tx",
  91                 .stream_name    = "HiFi Playback",
  92                 .codec_dai_name = "sgtl5000",
  93                 .codec_name     = "sgtl5000.0-000a",
  94                 .cpu_dai_name   = "mxs-saif.0",
  95                 .platform_name  = "mxs-saif.0",
  96                 .ops            = &mxs_sgtl5000_hifi_ops,
  97         }, {
  98                 .name           = "HiFi Rx",
  99                 .stream_name    = "HiFi Capture",
 100                 .codec_dai_name = "sgtl5000",
 101                 .codec_name     = "sgtl5000.0-000a",
 102                 .cpu_dai_name   = "mxs-saif.1",
 103                 .platform_name  = "mxs-saif.1",
 104                 .ops            = &mxs_sgtl5000_hifi_ops,
 105         },
 106 };
 107
 108 static struct snd_soc_card mxs_sgtl5000 = {
 109         .name           = "mxs_sgtl5000",
 110         .owner          = THIS_MODULE,
 111         .dai_link       = mxs_sgtl5000_dai,
 112         .num_links      = ARRAY_SIZE(mxs_sgtl5000_dai),
 113 };
 114
 115 static int __devinit mxs_sgtl5000_probe_dt(struct platform_device *pdev)
 116 {
 117         struct device_node *np = pdev->dev.of_node;
 118         struct device_node *saif_np[2], *codec_np;
 119         int i, ret = 0;
 120
 121         if (!np)
 122                 return 1; /* no device tree */
 123
 124         saif_np[0] = of_parse_phandle(np, "saif-controllers", 0);
 125         saif_np[1] = of_parse_phandle(np, "saif-controllers", 1);
 126         codec_np = of_parse_phandle(np, "audio-codec", 0);
 127         if (!saif_np[0] || !saif_np[1] || !codec_np) {
 128                 dev_err(&pdev->dev, "phandle missing or invalid\n");
 129                 return -EINVAL;
 130         }
 131
 132         for (i = 0; i < 2; i++) {
 133                 mxs_sgtl5000_dai[i].codec_name = NULL;
 134                 mxs_sgtl5000_dai[i].codec_of_node = codec_np;
 135                 mxs_sgtl5000_dai[i].cpu_dai_name = NULL;
 136                 mxs_sgtl5000_dai[i].cpu_of_node = saif_np[i];
 137                 mxs_sgtl5000_dai[i].platform_name = NULL;
 138                 mxs_sgtl5000_dai[i].platform_of_node = saif_np[i];
 139         }
 140
 141         of_node_put(codec_np);
 142         of_node_put(saif_np[0]);
 143         of_node_put(saif_np[1]);
 144
 145         return ret;
 146 }
 147
 148 static int __devinit mxs_sgtl5000_probe(struct platform_device *pdev)
 149 {
 150         struct snd_soc_card *card = &mxs_sgtl5000;
 151         int ret;
 152
 153         ret = mxs_sgtl5000_probe_dt(pdev);
 154         if (ret < 0)
 155                 return ret;
 156
 157         /*
 158          * Set an init clock(11.28Mhz) for sgtl5000 initialization(i2c r/w).
 159          * The Sgtl5000 sysclk is derived from saif0 mclk and it's range
 160          * should be >= 8MHz and <= 27M.
 161          */
 162         ret = mxs_saif_get_mclk(0, 44100 * 256, 44100);
 163         if (ret)
 164                 return ret;
 165
 166         card->dev = &pdev->dev;
 167         platform_set_drvdata(pdev, card);
 168
 169         ret = snd_soc_register_card(card);
 170         if (ret) {
 171                 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
 172                         ret);
 173                 return ret;
 174         }
 175
 176         return 0;
 177 }
 178
 179 static int __devexit mxs_sgtl5000_remove(struct platform_device *pdev)
 180 {
 181         struct snd_soc_card *card = platform_get_drvdata(pdev);
 182
 183         mxs_saif_put_mclk(0);
 184
 185         snd_soc_unregister_card(card);
 186
 187         return 0;
 188 }
 189
 190 static const struct of_device_id mxs_sgtl5000_dt_ids[] = {
 191         { .compatible = "fsl,mxs-audio-sgtl5000", },
 192         { /* sentinel */ }
 193 };
 194 MODULE_DEVICE_TABLE(of, mxs_sgtl5000_dt_ids);
 195
 196 static struct platform_driver mxs_sgtl5000_audio_driver = {
 197         .driver = {
 198                 .name = "mxs-sgtl5000",
 199                 .owner = THIS_MODULE,
 200                 .of_match_table = mxs_sgtl5000_dt_ids,
 201         },
 202         .probe = mxs_sgtl5000_probe,
 203         .remove = __devexit_p(mxs_sgtl5000_remove),
 204 };
 205
 206 module_platform_driver(mxs_sgtl5000_audio_driver);
 207
 208 MODULE_AUTHOR("Freescale Semiconductor, Inc.");
 209 MODULE_DESCRIPTION("MXS ALSA SoC Machine driver");
 210 MODULE_LICENSE("GPL");
 211 MODULE_ALIAS("platform:mxs-sgtl5000");