sound/soc/omap/omap-twl4030.c

   1 /*
   2  * omap-twl4030.c  --  SoC audio for TI SoC based boards with twl4030 codec
   3  *
   4  * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com
   5  * All rights reserved.
   6  *
   7  * Author: Peter Ujfalusi <peter.ujfalusi@ti.com>
   8  *
   9  * This driver replaces the following machine drivers:
  10  * omap3beagle (Author: Steve Sakoman <steve@sakoman.com>)
  11  * omap3evm (Author: Anuj Aggarwal <anuj.aggarwal@ti.com>)
  12  * overo (Author: Steve Sakoman <steve@sakoman.com>)
  13  * igep0020 (Author: Enric Balletbo i Serra <eballetbo@iseebcn.com>)
  14  *
  15  * This program is free software; you can redistribute it and/or
  16  * modify it under the terms of the GNU General Public License
  17  * version 2 as published by the Free Software Foundation.
  18  *
  19  * This program is distributed in the hope that it will be useful, but
  20  * WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  22  * General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU General Public License
  25  * along with this program; if not, write to the Free Software
  26  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  27  * 02110-1301 USA
  28  *
  29  */
  30
  31 #include <linux/platform_device.h>
  32 #include <linux/platform_data/omap-twl4030.h>
  33 #include <linux/module.h>
  34 #include <linux/of.h>
  35
  36 #include <sound/core.h>
  37 #include <sound/pcm.h>
  38 #include <sound/soc.h>
  39
  40 #include "omap-mcbsp.h"
  41 #include "omap-pcm.h"
  42
  43 static int omap_twl4030_hw_params(struct snd_pcm_substream *substream,
  44         struct snd_pcm_hw_params *params)
  45 {
  46         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  47         struct snd_soc_dai *codec_dai = rtd->codec_dai;
  48         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  49         struct snd_soc_codec *codec = rtd->codec;
  50         struct snd_soc_card *card = codec->card;
  51         unsigned int fmt;
  52         int ret;
  53
  54         switch (params_channels(params)) {
  55         case 2: /* Stereo I2S mode */
  56                 fmt =   SND_SOC_DAIFMT_I2S |
  57                         SND_SOC_DAIFMT_NB_NF |
  58                         SND_SOC_DAIFMT_CBM_CFM;
  59                 break;
  60         case 4: /* Four channel TDM mode */
  61                 fmt =   SND_SOC_DAIFMT_DSP_A |
  62                         SND_SOC_DAIFMT_IB_NF |
  63                         SND_SOC_DAIFMT_CBM_CFM;
  64                 break;
  65         default:
  66                 return -EINVAL;
  67         }
  68
  69         /* Set codec DAI configuration */
  70         ret = snd_soc_dai_set_fmt(codec_dai, fmt);
  71         if (ret < 0) {
  72                 dev_err(card->dev, "can't set codec DAI configuration\n");
  73                 return ret;
  74         }
  75
  76         /* Set cpu DAI configuration */
  77         ret = snd_soc_dai_set_fmt(cpu_dai, fmt);
  78         if (ret < 0) {
  79                 dev_err(card->dev, "can't set cpu DAI configuration\n");
  80                 return ret;
  81         }
  82
  83         return 0;
  84 }
  85
  86 static struct snd_soc_ops omap_twl4030_ops = {
  87         .hw_params = omap_twl4030_hw_params,
  88 };
  89
  90 /* Digital audio interface glue - connects codec <--> CPU */
  91 static struct snd_soc_dai_link omap_twl4030_dai_links[] = {
  92         {
  93                 .name = "TWL4030",
  94                 .stream_name = "TWL4030",
  95                 .cpu_dai_name = "omap-mcbsp.2",
  96                 .codec_dai_name = "twl4030-hifi",
  97                 .platform_name = "omap-pcm-audio",
  98                 .codec_name = "twl4030-codec",
  99                 .ops = &omap_twl4030_ops,
 100         },
 101 };
 102
 103 /* Audio machine driver */
 104 static struct snd_soc_card omap_twl4030_card = {
 105         .owner = THIS_MODULE,
 106         .dai_link = omap_twl4030_dai_links,
 107         .num_links = ARRAY_SIZE(omap_twl4030_dai_links),
 108 };
 109
 110 static int omap_twl4030_probe(struct platform_device *pdev)
 111 {
 112         struct omap_tw4030_pdata *pdata = dev_get_platdata(&pdev->dev);
 113         struct device_node *node = pdev->dev.of_node;
 114         struct snd_soc_card *card = &omap_twl4030_card;
 115         int ret = 0;
 116
 117         card->dev = &pdev->dev;
 118
 119         if (node) {
 120                 struct device_node *dai_node;
 121
 122                 if (snd_soc_of_parse_card_name(card, "ti,model")) {
 123                         dev_err(&pdev->dev, "Card name is not provided\n");
 124                         return -ENODEV;
 125                 }
 126
 127                 dai_node = of_parse_phandle(node, "ti,mcbsp", 0);
 128                 if (!dai_node) {
 129                         dev_err(&pdev->dev, "McBSP node is not provided\n");
 130                         return -EINVAL;
 131                 }
 132                 omap_twl4030_dai_links[0].cpu_dai_name  = NULL;
 133                 omap_twl4030_dai_links[0].cpu_of_node = dai_node;
 134
 135         } else if (pdata) {
 136                 if (pdata->card_name) {
 137                         card->name = pdata->card_name;
 138                 } else {
 139                         dev_err(&pdev->dev, "Card name is not provided\n");
 140                         return -ENODEV;
 141                 }
 142         } else {
 143                 dev_err(&pdev->dev, "Missing pdata\n");
 144                 return -ENODEV;
 145         }
 146
 147         ret = snd_soc_register_card(card);
 148         if (ret) {
 149                 dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
 150                         ret);
 151                 return ret;
 152         }
 153
 154         return 0;
 155 }
 156
 157 static int omap_twl4030_remove(struct platform_device *pdev)
 158 {
 159         struct snd_soc_card *card = platform_get_drvdata(pdev);
 160
 161         snd_soc_unregister_card(card);
 162
 163         return 0;
 164 }
 165
 166 static const struct of_device_id omap_twl4030_of_match[] = {
 167         {.compatible = "ti,omap-twl4030", },
 168         { },
 169 };
 170 MODULE_DEVICE_TABLE(of, omap_twl4030_of_match);
 171
 172 static struct platform_driver omap_twl4030_driver = {
 173         .driver = {
 174                 .name = "omap-twl4030",
 175                 .owner = THIS_MODULE,
 176                 .pm = &snd_soc_pm_ops,
 177                 .of_match_table = omap_twl4030_of_match,
 178         },
 179         .probe = omap_twl4030_probe,
 180         .remove = omap_twl4030_remove,
 181 };
 182
 183 module_platform_driver(omap_twl4030_driver);
 184
 185 MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@ti.com>");
 186 MODULE_DESCRIPTION("ALSA SoC for TI SoC based boards with twl4030 codec");
 187 MODULE_LICENSE("GPL");
 188 MODULE_ALIAS("platform:omap-twl4030");