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
  29 #include "../codecs/sgtl5000.h"
  30 #include "mxs-saif.h"
  31
  32 static int mxs_sgtl5000_hw_params(struct snd_pcm_substream *substream,
  33         struct snd_pcm_hw_params *params)
  34 {
  35         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  36         struct snd_soc_dai *codec_dai = rtd->codec_dai;
  37         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  38         unsigned int rate = params_rate(params);
  39         u32 mclk;
  40         int ret;
  41
  42         /* sgtl5000 does not support 512*rate when in 96000 fs */
  43         switch (rate) {
  44         case 96000:
  45                 mclk = 256 * rate;
  46                 break;
  47         default:
  48                 mclk = 512 * rate;
  49                 break;
  50         }
  51
  52         /* Set SGTL5000's SYSCLK (provided by SAIF MCLK) */
  53         ret = snd_soc_dai_set_sysclk(codec_dai, SGTL5000_SYSCLK, mclk, 0);
  54         if (ret) {
  55                 dev_err(codec_dai->dev, "Failed to set sysclk to %u.%03uMHz\n",
  56                         mclk / 1000000, mclk / 1000 % 1000);
  57                 return ret;
  58         }
  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                 dev_err(cpu_dai->dev, "Failed to set sysclk to %u.%03uMHz\n",
  64                         mclk / 1000000, mclk / 1000 % 1000);
  65                 return ret;
  66         }
  67
  68         return 0;
  69 }
  70
  71 static struct snd_soc_ops mxs_sgtl5000_hifi_ops = {
  72         .hw_params = mxs_sgtl5000_hw_params,
  73 };
  74
  75 #define MXS_SGTL5000_DAI_FMT (SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | \
  76         SND_SOC_DAIFMT_CBS_CFS)
  77
  78 static struct snd_soc_dai_link mxs_sgtl5000_dai[] = {
  79         {
  80                 .name           = "HiFi Tx",
  81                 .stream_name    = "HiFi Playback",
  82                 .codec_dai_name = "sgtl5000",
  83                 .dai_fmt        = MXS_SGTL5000_DAI_FMT,
  84                 .ops            = &mxs_sgtl5000_hifi_ops,
  85                 .playback_only  = true,
  86         }, {
  87                 .name           = "HiFi Rx",
  88                 .stream_name    = "HiFi Capture",
  89                 .codec_dai_name = "sgtl5000",
  90                 .dai_fmt        = MXS_SGTL5000_DAI_FMT,
  91                 .ops            = &mxs_sgtl5000_hifi_ops,
  92                 .capture_only   = true,
  93         },
  94 };
  95
  96 static struct snd_soc_card mxs_sgtl5000 = {
  97         .name           = "mxs_sgtl5000",
  98         .owner          = THIS_MODULE,
  99         .dai_link       = mxs_sgtl5000_dai,
 100         .num_links      = ARRAY_SIZE(mxs_sgtl5000_dai),
 101 };
 102
 103 static int mxs_sgtl5000_probe(struct platform_device *pdev)
 104 {
 105         struct snd_soc_card *card = &mxs_sgtl5000;
 106         int ret, i;
 107         struct device_node *np = pdev->dev.of_node;
 108         struct device_node *saif_np[2], *codec_np;
 109
 110         saif_np[0] = of_parse_phandle(np, "saif-controllers", 0);
 111         saif_np[1] = of_parse_phandle(np, "saif-controllers", 1);
 112         codec_np = of_parse_phandle(np, "audio-codec", 0);
 113         if (!saif_np[0] || !saif_np[1] || !codec_np) {
 114                 dev_err(&pdev->dev, "phandle missing or invalid\n");
 115                 return -EINVAL;
 116         }
 117
 118         for (i = 0; i < 2; i++) {
 119                 mxs_sgtl5000_dai[i].codec_name = NULL;
 120                 mxs_sgtl5000_dai[i].codec_of_node = codec_np;
 121                 mxs_sgtl5000_dai[i].cpu_dai_name = NULL;
 122                 mxs_sgtl5000_dai[i].cpu_of_node = saif_np[i];
 123                 mxs_sgtl5000_dai[i].platform_name = NULL;
 124                 mxs_sgtl5000_dai[i].platform_of_node = saif_np[i];
 125         }
 126
 127         of_node_put(codec_np);
 128         of_node_put(saif_np[0]);
 129         of_node_put(saif_np[1]);
 130
 131         /*
 132          * Set an init clock(11.28Mhz) for sgtl5000 initialization(i2c r/w).
 133          * The Sgtl5000 sysclk is derived from saif0 mclk and it's range
 134          * should be >= 8MHz and <= 27M.
 135          */
 136         ret = mxs_saif_get_mclk(0, 44100 * 256, 44100);
 137         if (ret) {
 138                 dev_err(&pdev->dev, "failed to get mclk\n");
 139                 return ret;
 140         }
 141
 142         card->dev = &pdev->dev;
 143         platform_set_drvdata(pdev, card);
 144
 145         ret = snd_soc_register_card(card);
 146         if (ret) {
 147                 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
 148                         ret);
 149                 return ret;
 150         }
 151
 152         return 0;
 153 }
 154
 155 static int mxs_sgtl5000_remove(struct platform_device *pdev)
 156 {
 157         struct snd_soc_card *card = platform_get_drvdata(pdev);
 158
 159         mxs_saif_put_mclk(0);
 160
 161         snd_soc_unregister_card(card);
 162
 163         return 0;
 164 }
 165
 166 static const struct of_device_id mxs_sgtl5000_dt_ids[] = {
 167         { .compatible = "fsl,mxs-audio-sgtl5000", },
 168         { /* sentinel */ }
 169 };
 170 MODULE_DEVICE_TABLE(of, mxs_sgtl5000_dt_ids);
 171
 172 static struct platform_driver mxs_sgtl5000_audio_driver = {
 173         .driver = {
 174                 .name = "mxs-sgtl5000",
 175                 .of_match_table = mxs_sgtl5000_dt_ids,
 176         },
 177         .probe = mxs_sgtl5000_probe,
 178         .remove = mxs_sgtl5000_remove,
 179 };
 180
 181 module_platform_driver(mxs_sgtl5000_audio_driver);
 182
 183 MODULE_AUTHOR("Freescale Semiconductor, Inc.");
 184 MODULE_DESCRIPTION("MXS ALSA SoC Machine driver");
 185 MODULE_LICENSE("GPL");
 186 MODULE_ALIAS("platform:mxs-sgtl5000");