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 const 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 const struct snd_soc_dapm_widget mxs_sgtl5000_dapm_widgets[] = {
  97         SND_SOC_DAPM_MIC("Mic Jack", NULL),
  98         SND_SOC_DAPM_LINE("Line In Jack", NULL),
  99         SND_SOC_DAPM_HP("Headphone Jack", NULL),
 100         SND_SOC_DAPM_SPK("Line Out Jack", NULL),
 101         SND_SOC_DAPM_SPK("Ext Spk", NULL),
 102 };
 103
 104 static struct snd_soc_card mxs_sgtl5000 = {
 105         .name           = "mxs_sgtl5000",
 106         .owner          = THIS_MODULE,
 107         .dai_link       = mxs_sgtl5000_dai,
 108         .num_links      = ARRAY_SIZE(mxs_sgtl5000_dai),
 109 };
 110
 111 static int mxs_sgtl5000_probe(struct platform_device *pdev)
 112 {
 113         struct snd_soc_card *card = &mxs_sgtl5000;
 114         int ret, i;
 115         struct device_node *np = pdev->dev.of_node;
 116         struct device_node *saif_np[2], *codec_np;
 117
 118         saif_np[0] = of_parse_phandle(np, "saif-controllers", 0);
 119         saif_np[1] = of_parse_phandle(np, "saif-controllers", 1);
 120         codec_np = of_parse_phandle(np, "audio-codec", 0);
 121         if (!saif_np[0] || !saif_np[1] || !codec_np) {
 122                 dev_err(&pdev->dev, "phandle missing or invalid\n");
 123                 return -EINVAL;
 124         }
 125
 126         for (i = 0; i < 2; i++) {
 127                 mxs_sgtl5000_dai[i].codec_name = NULL;
 128                 mxs_sgtl5000_dai[i].codec_of_node = codec_np;
 129                 mxs_sgtl5000_dai[i].cpu_dai_name = NULL;
 130                 mxs_sgtl5000_dai[i].cpu_of_node = saif_np[i];
 131                 mxs_sgtl5000_dai[i].platform_name = NULL;
 132                 mxs_sgtl5000_dai[i].platform_of_node = saif_np[i];
 133         }
 134
 135         of_node_put(codec_np);
 136         of_node_put(saif_np[0]);
 137         of_node_put(saif_np[1]);
 138
 139         /*
 140          * Set an init clock(11.28Mhz) for sgtl5000 initialization(i2c r/w).
 141          * The Sgtl5000 sysclk is derived from saif0 mclk and it's range
 142          * should be >= 8MHz and <= 27M.
 143          */
 144         ret = mxs_saif_get_mclk(0, 44100 * 256, 44100);
 145         if (ret) {
 146                 dev_err(&pdev->dev, "failed to get mclk\n");
 147                 return ret;
 148         }
 149
 150         card->dev = &pdev->dev;
 151
 152         if (of_find_property(np, "audio-routing", NULL)) {
 153                 card->dapm_widgets = mxs_sgtl5000_dapm_widgets;
 154                 card->num_dapm_widgets = ARRAY_SIZE(mxs_sgtl5000_dapm_widgets);
 155
 156                 ret = snd_soc_of_parse_audio_routing(card, "audio-routing");
 157                 if (ret) {
 158                         dev_err(&pdev->dev, "failed to parse audio-routing (%d)\n",
 159                                 ret);
 160                         return ret;
 161                 }
 162         }
 163
 164         ret = devm_snd_soc_register_card(&pdev->dev, card);
 165         if (ret) {
 166                 if (ret != -EPROBE_DEFER)
 167                         dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
 168                                 ret);
 169                 return ret;
 170         }
 171
 172         return 0;
 173 }
 174
 175 static int mxs_sgtl5000_remove(struct platform_device *pdev)
 176 {
 177         mxs_saif_put_mclk(0);
 178
 179         return 0;
 180 }
 181
 182 static const struct of_device_id mxs_sgtl5000_dt_ids[] = {
 183         { .compatible = "fsl,mxs-audio-sgtl5000", },
 184         { /* sentinel */ }
 185 };
 186 MODULE_DEVICE_TABLE(of, mxs_sgtl5000_dt_ids);
 187
 188 static struct platform_driver mxs_sgtl5000_audio_driver = {
 189         .driver = {
 190                 .name = "mxs-sgtl5000",
 191                 .of_match_table = mxs_sgtl5000_dt_ids,
 192         },
 193         .probe = mxs_sgtl5000_probe,
 194         .remove = mxs_sgtl5000_remove,
 195 };
 196
 197 module_platform_driver(mxs_sgtl5000_audio_driver);
 198
 199 MODULE_AUTHOR("Freescale Semiconductor, Inc.");
 200 MODULE_DESCRIPTION("MXS ALSA SoC Machine driver");
 201 MODULE_LICENSE("GPL");
 202 MODULE_ALIAS("platform:mxs-sgtl5000");