sound/soc/omap/zoom2.c

   1 /*
   2  * zoom2.c  --  SoC audio for Zoom2
   3  *
   4  * Author: Misael Lopez Cruz <x0052729@ti.com>
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * version 2 as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  18  * 02110-1301 USA
  19  *
  20  */
  21
  22 #include <linux/clk.h>
  23 #include <linux/platform_device.h>
  24 #include <linux/gpio.h>
  25 #include <sound/core.h>
  26 #include <sound/pcm.h>
  27 #include <sound/soc.h>
  28
  29 #include <asm/mach-types.h>
  30 #include <linux/platform_data/asoc-ti-mcbsp.h>
  31 #include <linux/platform_data/gpio-omap.h>
  32
  33 /* Register descriptions for twl4030 codec part */
  34 #include <linux/mfd/twl4030-audio.h>
  35 #include <linux/module.h>
  36
  37 #include "omap-mcbsp.h"
  38 #include "omap-pcm.h"
  39
  40 static int zoom2_hw_params(struct snd_pcm_substream *substream,
  41                                 struct snd_pcm_hw_params *params)
  42 {
  43         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  44         struct snd_soc_dai *codec_dai = rtd->codec_dai;
  45         int ret;
  46
  47         /* Set the codec system clock for DAC and ADC */
  48         ret = snd_soc_dai_set_sysclk(codec_dai, 0, 26000000,
  49                                         SND_SOC_CLOCK_IN);
  50         if (ret < 0) {
  51                 printk(KERN_ERR "can't set codec system clock\n");
  52                 return ret;
  53         }
  54
  55         return 0;
  56 }
  57
  58 static struct snd_soc_ops zoom2_ops = {
  59         .hw_params = zoom2_hw_params,
  60 };
  61
  62 /* Zoom2 machine DAPM */
  63 static const struct snd_soc_dapm_widget zoom2_twl4030_dapm_widgets[] = {
  64         SND_SOC_DAPM_MIC("Ext Mic", NULL),
  65         SND_SOC_DAPM_SPK("Ext Spk", NULL),
  66         SND_SOC_DAPM_MIC("Headset Mic", NULL),
  67         SND_SOC_DAPM_HP("Headset Stereophone", NULL),
  68         SND_SOC_DAPM_LINE("Aux In", NULL),
  69 };
  70
  71 static const struct snd_soc_dapm_route audio_map[] = {
  72         /* External Mics: MAINMIC, SUBMIC with bias*/
  73         {"MAINMIC", NULL, "Mic Bias 1"},
  74         {"SUBMIC", NULL, "Mic Bias 2"},
  75         {"Mic Bias 1", NULL, "Ext Mic"},
  76         {"Mic Bias 2", NULL, "Ext Mic"},
  77
  78         /* External Speakers: HFL, HFR */
  79         {"Ext Spk", NULL, "HFL"},
  80         {"Ext Spk", NULL, "HFR"},
  81
  82         /* Headset Stereophone:  HSOL, HSOR */
  83         {"Headset Stereophone", NULL, "HSOL"},
  84         {"Headset Stereophone", NULL, "HSOR"},
  85
  86         /* Headset Mic: HSMIC with bias */
  87         {"HSMIC", NULL, "Headset Mic Bias"},
  88         {"Headset Mic Bias", NULL, "Headset Mic"},
  89
  90         /* Aux In: AUXL, AUXR */
  91         {"Aux In", NULL, "AUXL"},
  92         {"Aux In", NULL, "AUXR"},
  93 };
  94
  95 static int zoom2_twl4030_init(struct snd_soc_pcm_runtime *rtd)
  96 {
  97         struct snd_soc_codec *codec = rtd->codec;
  98         struct snd_soc_dapm_context *dapm = &codec->dapm;
  99
 100         /* TWL4030 not connected pins */
 101         snd_soc_dapm_nc_pin(dapm, "CARKITMIC");
 102         snd_soc_dapm_nc_pin(dapm, "DIGIMIC0");
 103         snd_soc_dapm_nc_pin(dapm, "DIGIMIC1");
 104         snd_soc_dapm_nc_pin(dapm, "EARPIECE");
 105         snd_soc_dapm_nc_pin(dapm, "PREDRIVEL");
 106         snd_soc_dapm_nc_pin(dapm, "PREDRIVER");
 107         snd_soc_dapm_nc_pin(dapm, "CARKITL");
 108         snd_soc_dapm_nc_pin(dapm, "CARKITR");
 109
 110         return 0;
 111 }
 112
 113 static int zoom2_twl4030_voice_init(struct snd_soc_pcm_runtime *rtd)
 114 {
 115         struct snd_soc_codec *codec = rtd->codec;
 116         unsigned short reg;
 117
 118         /* Enable voice interface */
 119         reg = codec->driver->read(codec, TWL4030_REG_VOICE_IF);
 120         reg |= TWL4030_VIF_DIN_EN | TWL4030_VIF_DOUT_EN | TWL4030_VIF_EN;
 121         codec->driver->write(codec, TWL4030_REG_VOICE_IF, reg);
 122
 123         return 0;
 124 }
 125
 126 /* Digital audio interface glue - connects codec <--> CPU */
 127 static struct snd_soc_dai_link zoom2_dai[] = {
 128         {
 129                 .name = "TWL4030 I2S",
 130                 .stream_name = "TWL4030 Audio",
 131                 .cpu_dai_name = "omap-mcbsp.2",
 132                 .codec_dai_name = "twl4030-hifi",
 133                 .platform_name = "omap-pcm-audio",
 134                 .codec_name = "twl4030-codec",
 135                 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
 136                            SND_SOC_DAIFMT_CBM_CFM,
 137                 .init = zoom2_twl4030_init,
 138                 .ops = &zoom2_ops,
 139         },
 140         {
 141                 .name = "TWL4030 PCM",
 142                 .stream_name = "TWL4030 Voice",
 143                 .cpu_dai_name = "omap-mcbsp.3",
 144                 .codec_dai_name = "twl4030-voice",
 145                 .platform_name = "omap-pcm-audio",
 146                 .codec_name = "twl4030-codec",
 147                 .dai_fmt = SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_IB_NF |
 148                            SND_SOC_DAIFMT_CBM_CFM,
 149                 .init = zoom2_twl4030_voice_init,
 150                 .ops = &zoom2_ops,
 151         },
 152 };
 153
 154 /* Audio machine driver */
 155 static struct snd_soc_card snd_soc_zoom2 = {
 156         .name = "Zoom2",
 157         .owner = THIS_MODULE,
 158         .dai_link = zoom2_dai,
 159         .num_links = ARRAY_SIZE(zoom2_dai),
 160
 161         .dapm_widgets = zoom2_twl4030_dapm_widgets,
 162         .num_dapm_widgets = ARRAY_SIZE(zoom2_twl4030_dapm_widgets),
 163         .dapm_routes = audio_map,
 164         .num_dapm_routes = ARRAY_SIZE(audio_map),
 165 };
 166
 167 static struct platform_device *zoom2_snd_device;
 168
 169 static int __init zoom2_soc_init(void)
 170 {
 171         int ret;
 172
 173         if (!machine_is_omap_zoom2())
 174                 return -ENODEV;
 175         printk(KERN_INFO "Zoom2 SoC init\n");
 176
 177         zoom2_snd_device = platform_device_alloc("soc-audio", -1);
 178         if (!zoom2_snd_device) {
 179                 printk(KERN_ERR "Platform device allocation failed\n");
 180                 return -ENOMEM;
 181         }
 182
 183         platform_set_drvdata(zoom2_snd_device, &snd_soc_zoom2);
 184         ret = platform_device_add(zoom2_snd_device);
 185         if (ret)
 186                 goto err1;
 187
 188         return 0;
 189
 190 err1:
 191         printk(KERN_ERR "Unable to add platform device\n");
 192         platform_device_put(zoom2_snd_device);
 193
 194         return ret;
 195 }
 196 module_init(zoom2_soc_init);
 197
 198 static void __exit zoom2_soc_exit(void)
 199 {
 200         platform_device_unregister(zoom2_snd_device);
 201 }
 202 module_exit(zoom2_soc_exit);
 203
 204 MODULE_AUTHOR("Misael Lopez Cruz <x0052729@ti.com>");
 205 MODULE_DESCRIPTION("ALSA SoC Zoom2");
 206 MODULE_LICENSE("GPL");
 207