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 <sound/core.h>
  25 #include <sound/pcm.h>
  26 #include <sound/soc.h>
  27
  28 #include <asm/mach-types.h>
  29 #include <mach/hardware.h>
  30 #include <mach/gpio.h>
  31 #include <mach/board-zoom.h>
  32 #include <plat/mcbsp.h>
  33
  34 /* Register descriptions for twl4030 codec part */
  35 #include <linux/mfd/twl4030-audio.h>
  36
  37 #include "omap-mcbsp.h"
  38 #include "omap-pcm.h"
  39
  40 #define ZOOM2_HEADSET_MUX_GPIO          (OMAP_MAX_GPIO_LINES + 15)
  41
  42 static int zoom2_hw_params(struct snd_pcm_substream *substream,
  43                                 struct snd_pcm_hw_params *params)
  44 {
  45         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  46         struct snd_soc_dai *codec_dai = rtd->codec_dai;
  47         int ret;
  48
  49         /* Set the codec system clock for DAC and ADC */
  50         ret = snd_soc_dai_set_sysclk(codec_dai, 0, 26000000,
  51                                         SND_SOC_CLOCK_IN);
  52         if (ret < 0) {
  53                 printk(KERN_ERR "can't set codec system clock\n");
  54                 return ret;
  55         }
  56
  57         return 0;
  58 }
  59
  60 static struct snd_soc_ops zoom2_ops = {
  61         .hw_params = zoom2_hw_params,
  62 };
  63
  64 /* Zoom2 machine DAPM */
  65 static const struct snd_soc_dapm_widget zoom2_twl4030_dapm_widgets[] = {
  66         SND_SOC_DAPM_MIC("Ext Mic", NULL),
  67         SND_SOC_DAPM_SPK("Ext Spk", NULL),
  68         SND_SOC_DAPM_MIC("Headset Mic", NULL),
  69         SND_SOC_DAPM_HP("Headset Stereophone", NULL),
  70         SND_SOC_DAPM_LINE("Aux In", NULL),
  71 };
  72
  73 static const struct snd_soc_dapm_route audio_map[] = {
  74         /* External Mics: MAINMIC, SUBMIC with bias*/
  75         {"MAINMIC", NULL, "Mic Bias 1"},
  76         {"SUBMIC", NULL, "Mic Bias 2"},
  77         {"Mic Bias 1", NULL, "Ext Mic"},
  78         {"Mic Bias 2", NULL, "Ext Mic"},
  79
  80         /* External Speakers: HFL, HFR */
  81         {"Ext Spk", NULL, "HFL"},
  82         {"Ext Spk", NULL, "HFR"},
  83
  84         /* Headset Stereophone:  HSOL, HSOR */
  85         {"Headset Stereophone", NULL, "HSOL"},
  86         {"Headset Stereophone", NULL, "HSOR"},
  87
  88         /* Headset Mic: HSMIC with bias */
  89         {"HSMIC", NULL, "Headset Mic Bias"},
  90         {"Headset Mic Bias", NULL, "Headset Mic"},
  91
  92         /* Aux In: AUXL, AUXR */
  93         {"Aux In", NULL, "AUXL"},
  94         {"Aux In", NULL, "AUXR"},
  95 };
  96
  97 static int zoom2_twl4030_init(struct snd_soc_pcm_runtime *rtd)
  98 {
  99         struct snd_soc_codec *codec = rtd->codec;
 100         struct snd_soc_dapm_context *dapm = &codec->dapm;
 101
 102         /* TWL4030 not connected pins */
 103         snd_soc_dapm_nc_pin(dapm, "CARKITMIC");
 104         snd_soc_dapm_nc_pin(dapm, "DIGIMIC0");
 105         snd_soc_dapm_nc_pin(dapm, "DIGIMIC1");
 106         snd_soc_dapm_nc_pin(dapm, "EARPIECE");
 107         snd_soc_dapm_nc_pin(dapm, "PREDRIVEL");
 108         snd_soc_dapm_nc_pin(dapm, "PREDRIVER");
 109         snd_soc_dapm_nc_pin(dapm, "CARKITL");
 110         snd_soc_dapm_nc_pin(dapm, "CARKITR");
 111
 112         return 0;
 113 }
 114
 115 static int zoom2_twl4030_voice_init(struct snd_soc_pcm_runtime *rtd)
 116 {
 117         struct snd_soc_codec *codec = rtd->codec;
 118         unsigned short reg;
 119
 120         /* Enable voice interface */
 121         reg = codec->driver->read(codec, TWL4030_REG_VOICE_IF);
 122         reg |= TWL4030_VIF_DIN_EN | TWL4030_VIF_DOUT_EN | TWL4030_VIF_EN;
 123         codec->driver->write(codec, TWL4030_REG_VOICE_IF, reg);
 124
 125         return 0;
 126 }
 127
 128 /* Digital audio interface glue - connects codec <--> CPU */
 129 static struct snd_soc_dai_link zoom2_dai[] = {
 130         {
 131                 .name = "TWL4030 I2S",
 132                 .stream_name = "TWL4030 Audio",
 133                 .cpu_dai_name = "omap-mcbsp-dai.1",
 134                 .codec_dai_name = "twl4030-hifi",
 135                 .platform_name = "omap-pcm-audio",
 136                 .codec_name = "twl4030-codec",
 137                 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
 138                            SND_SOC_DAIFMT_CBM_CFM,
 139                 .init = zoom2_twl4030_init,
 140                 .ops = &zoom2_ops,
 141         },
 142         {
 143                 .name = "TWL4030 PCM",
 144                 .stream_name = "TWL4030 Voice",
 145                 .cpu_dai_name = "omap-mcbsp-dai.2",
 146                 .codec_dai_name = "twl4030-voice",
 147                 .platform_name = "omap-pcm-audio",
 148                 .codec_name = "twl4030-codec",
 149                 .dai_fmt = SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_IB_NF |
 150                            SND_SOC_DAIFMT_CBM_CFM,
 151                 .init = zoom2_twl4030_voice_init,
 152                 .ops = &zoom2_ops,
 153         },
 154 };
 155
 156 /* Audio machine driver */
 157 static struct snd_soc_card snd_soc_zoom2 = {
 158         .name = "Zoom2",
 159         .dai_link = zoom2_dai,
 160         .num_links = ARRAY_SIZE(zoom2_dai),
 161
 162         .dapm_widgets = zoom2_twl4030_dapm_widgets,
 163         .num_dapm_widgets = ARRAY_SIZE(zoom2_twl4030_dapm_widgets),
 164         .dapm_routes = audio_map,
 165         .num_dapm_routes = ARRAY_SIZE(audio_map),
 166 };
 167
 168 static struct platform_device *zoom2_snd_device;
 169
 170 static int __init zoom2_soc_init(void)
 171 {
 172         int ret;
 173
 174         if (!machine_is_omap_zoom2())
 175                 return -ENODEV;
 176         printk(KERN_INFO "Zoom2 SoC init\n");
 177
 178         zoom2_snd_device = platform_device_alloc("soc-audio", -1);
 179         if (!zoom2_snd_device) {
 180                 printk(KERN_ERR "Platform device allocation failed\n");
 181                 return -ENOMEM;
 182         }
 183
 184         platform_set_drvdata(zoom2_snd_device, &snd_soc_zoom2);
 185         ret = platform_device_add(zoom2_snd_device);
 186         if (ret)
 187                 goto err1;
 188
 189         BUG_ON(gpio_request(ZOOM2_HEADSET_MUX_GPIO, "hs_mux") < 0);
 190         gpio_direction_output(ZOOM2_HEADSET_MUX_GPIO, 0);
 191
 192         BUG_ON(gpio_request(ZOOM2_HEADSET_EXTMUTE_GPIO, "ext_mute") < 0);
 193         gpio_direction_output(ZOOM2_HEADSET_EXTMUTE_GPIO, 0);
 194
 195         return 0;
 196
 197 err1:
 198         printk(KERN_ERR "Unable to add platform device\n");
 199         platform_device_put(zoom2_snd_device);
 200
 201         return ret;
 202 }
 203 module_init(zoom2_soc_init);
 204
 205 static void __exit zoom2_soc_exit(void)
 206 {
 207         gpio_free(ZOOM2_HEADSET_MUX_GPIO);
 208         gpio_free(ZOOM2_HEADSET_EXTMUTE_GPIO);
 209
 210         platform_device_unregister(zoom2_snd_device);
 211 }
 212 module_exit(zoom2_soc_exit);
 213
 214 MODULE_AUTHOR("Misael Lopez Cruz <x0052729@ti.com>");
 215 MODULE_DESCRIPTION("ALSA SoC Zoom2");
 216 MODULE_LICENSE("GPL");
 217