LXR linux/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
  40static 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
  58static struct snd_soc_ops zoom2_ops = {
  59        .hw_params = zoom2_hw_params,
  60};
  61
  62/* Zoom2 machine DAPM */
  63static 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
  71static 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
  95static 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
 113static 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 */
 127static 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 */
 155static 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
 167static struct platform_device *zoom2_snd_device;
 168
 169static 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
 190err1:
 191        printk(KERN_ERR "Unable to add platform device\n");
 192        platform_device_put(zoom2_snd_device);
 193
 194        return ret;
 195}
 196module_init(zoom2_soc_init);
 197
 198static void __exit zoom2_soc_exit(void)
 199{
 200        platform_device_unregister(zoom2_snd_device);
 201}
 202module_exit(zoom2_soc_exit);
 203
 204MODULE_AUTHOR("Misael Lopez Cruz <x0052729@ti.com>");
 205MODULE_DESCRIPTION("ALSA SoC Zoom2");
 206MODULE_LICENSE("GPL");
 207
 208