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 dai_format, 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         /* Sgtl5000 sysclk should be >= 8MHz and <= 27M */
  53         if (mclk < 8000000 || mclk > 27000000) {
  54                 dev_err(codec_dai->dev, "Invalid mclk frequency: %u.%03uMHz\n",
  55                         mclk / 1000000, mclk / 1000 % 1000);
  56                 return -EINVAL;
  57         }
  58
  59         /* Set SGTL5000's SYSCLK (provided by SAIF MCLK) */
  60         ret = snd_soc_dai_set_sysclk(codec_dai, SGTL5000_SYSCLK, mclk, 0);
  61         if (ret) {
  62                 dev_err(codec_dai->dev, "Failed to set sysclk to %u.%03uMHz\n",
  63                         mclk / 1000000, mclk / 1000 % 1000);
  64                 return ret;
  65         }
  66
  67         /* The SAIF MCLK should be the same as SGTL5000_SYSCLK */
  68         ret = snd_soc_dai_set_sysclk(cpu_dai, MXS_SAIF_MCLK, mclk, 0);
  69         if (ret) {
  70                 dev_err(cpu_dai->dev, "Failed to set sysclk to %u.%03uMHz\n",
  71                         mclk / 1000000, mclk / 1000 % 1000);
  72                 return ret;
  73         }
  74
  75         /* set codec to slave mode */
  76         dai_format = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
  77                         SND_SOC_DAIFMT_CBS_CFS;
  78
  79         /* set codec DAI configuration */
  80         ret = snd_soc_dai_set_fmt(codec_dai, dai_format);
  81         if (ret) {
  82                 dev_err(codec_dai->dev, "Failed to set dai format to %08x\n",
  83                         dai_format);
  84                 return ret;
  85         }
  86
  87         /* set cpu DAI configuration */
  88         ret = snd_soc_dai_set_fmt(cpu_dai, dai_format);
  89         if (ret) {
  90                 dev_err(cpu_dai->dev, "Failed to set dai format to %08x\n",
  91                         dai_format);
  92                 return ret;
  93         }
  94
  95         return 0;
  96 }
  97
  98 static struct snd_soc_ops mxs_sgtl5000_hifi_ops = {
  99         .hw_params = mxs_sgtl5000_hw_params,
 100 };
 101
 102 static struct snd_soc_dai_link mxs_sgtl5000_dai[] = {
 103         {
 104                 .name           = "HiFi Tx",
 105                 .stream_name    = "HiFi Playback",
 106                 .codec_dai_name = "sgtl5000",
 107                 .ops            = &mxs_sgtl5000_hifi_ops,
 108                 .playback_only  = true,
 109         }, {
 110                 .name           = "HiFi Rx",
 111                 .stream_name    = "HiFi Capture",
 112                 .codec_dai_name = "sgtl5000",
 113                 .ops            = &mxs_sgtl5000_hifi_ops,
 114                 .capture_only   = true,
 115         },
 116 };
 117
 118 static struct snd_soc_card mxs_sgtl5000 = {
 119         .name           = "mxs_sgtl5000",
 120         .owner          = THIS_MODULE,
 121         .dai_link       = mxs_sgtl5000_dai,
 122         .num_links      = ARRAY_SIZE(mxs_sgtl5000_dai),
 123 };
 124
 125 static int mxs_sgtl5000_probe_dt(struct platform_device *pdev)
 126 {
 127         struct device_node *np = pdev->dev.of_node;
 128         struct device_node *saif_np[2], *codec_np;
 129         int i;
 130
 131         if (!np)
 132                 return 1; /* no device tree */
 133
 134         saif_np[0] = of_parse_phandle(np, "saif-controllers", 0);
 135         saif_np[1] = of_parse_phandle(np, "saif-controllers", 1);
 136         codec_np = of_parse_phandle(np, "audio-codec", 0);
 137         if (!saif_np[0] || !saif_np[1] || !codec_np) {
 138                 dev_err(&pdev->dev, "phandle missing or invalid\n");
 139                 return -EINVAL;
 140         }
 141
 142         for (i = 0; i < 2; i++) {
 143                 mxs_sgtl5000_dai[i].codec_name = NULL;
 144                 mxs_sgtl5000_dai[i].codec_of_node = codec_np;
 145                 mxs_sgtl5000_dai[i].cpu_dai_name = NULL;
 146                 mxs_sgtl5000_dai[i].cpu_of_node = saif_np[i];
 147                 mxs_sgtl5000_dai[i].platform_name = NULL;
 148                 mxs_sgtl5000_dai[i].platform_of_node = saif_np[i];
 149         }
 150
 151         of_node_put(codec_np);
 152         of_node_put(saif_np[0]);
 153         of_node_put(saif_np[1]);
 154
 155         return 0;
 156 }
 157
 158 static int mxs_sgtl5000_probe(struct platform_device *pdev)
 159 {
 160         struct snd_soc_card *card = &mxs_sgtl5000;
 161         int ret;
 162
 163         ret = mxs_sgtl5000_probe_dt(pdev);
 164         if (ret < 0)
 165                 return ret;
 166
 167         /*
 168          * Set an init clock(11.28Mhz) for sgtl5000 initialization(i2c r/w).
 169          * The Sgtl5000 sysclk is derived from saif0 mclk and it's range
 170          * should be >= 8MHz and <= 27M.
 171          */
 172         ret = mxs_saif_get_mclk(0, 44100 * 256, 44100);
 173         if (ret) {
 174                 dev_err(&pdev->dev, "failed to get mclk\n");
 175                 return ret;
 176         }
 177
 178         card->dev = &pdev->dev;
 179         platform_set_drvdata(pdev, card);
 180
 181         ret = snd_soc_register_card(card);
 182         if (ret) {
 183                 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
 184                         ret);
 185                 return ret;
 186         }
 187
 188         return 0;
 189 }
 190
 191 static int mxs_sgtl5000_remove(struct platform_device *pdev)
 192 {
 193         struct snd_soc_card *card = platform_get_drvdata(pdev);
 194
 195         mxs_saif_put_mclk(0);
 196
 197         snd_soc_unregister_card(card);
 198
 199         return 0;
 200 }
 201
 202 static const struct of_device_id mxs_sgtl5000_dt_ids[] = {
 203         { .compatible = "fsl,mxs-audio-sgtl5000", },
 204         { /* sentinel */ }
 205 };
 206 MODULE_DEVICE_TABLE(of, mxs_sgtl5000_dt_ids);
 207
 208 static struct platform_driver mxs_sgtl5000_audio_driver = {
 209         .driver = {
 210                 .name = "mxs-sgtl5000",
 211                 .owner = THIS_MODULE,
 212                 .of_match_table = mxs_sgtl5000_dt_ids,
 213         },
 214         .probe = mxs_sgtl5000_probe,
 215         .remove = mxs_sgtl5000_remove,
 216 };
 217
 218 module_platform_driver(mxs_sgtl5000_audio_driver);
 219
 220 MODULE_AUTHOR("Freescale Semiconductor, Inc.");
 221 MODULE_DESCRIPTION("MXS ALSA SoC Machine driver");
 222 MODULE_LICENSE("GPL");
 223 MODULE_ALIAS("platform:mxs-sgtl5000");