sound/soc/atmel/snd-soc-afeb9260.c

   1 /*
   2  * afeb9260.c  --  SoC audio for AFEB9260
   3  *
   4  * Copyright (C) 2009 Sergey Lapin <slapin@ossfans.org>
   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/module.h>
  23 #include <linux/moduleparam.h>
  24 #include <linux/kernel.h>
  25 #include <linux/clk.h>
  26 #include <linux/platform_device.h>
  27
  28 #include <linux/atmel-ssc.h>
  29 #include <sound/core.h>
  30 #include <sound/pcm.h>
  31 #include <sound/pcm_params.h>
  32 #include <sound/soc.h>
  33
  34 #include <asm/mach-types.h>
  35 #include <mach/hardware.h>
  36 #include <linux/gpio.h>
  37
  38 #include "../codecs/tlv320aic23.h"
  39 #include "atmel-pcm.h"
  40 #include "atmel_ssc_dai.h"
  41
  42 #define CODEC_CLOCK     12000000
  43
  44 static int afeb9260_hw_params(struct snd_pcm_substream *substream,
  45                          struct snd_pcm_hw_params *params)
  46 {
  47         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  48         struct snd_soc_dai *codec_dai = rtd->codec_dai;
  49         int err;
  50
  51         /* Set the codec system clock for DAC and ADC */
  52         err =
  53             snd_soc_dai_set_sysclk(codec_dai, 0, CODEC_CLOCK, SND_SOC_CLOCK_IN);
  54
  55         if (err < 0) {
  56                 printk(KERN_ERR "can't set codec system clock\n");
  57                 return err;
  58         }
  59
  60         return err;
  61 }
  62
  63 static struct snd_soc_ops afeb9260_ops = {
  64         .hw_params = afeb9260_hw_params,
  65 };
  66
  67 static const struct snd_soc_dapm_widget tlv320aic23_dapm_widgets[] = {
  68         SND_SOC_DAPM_HP("Headphone Jack", NULL),
  69         SND_SOC_DAPM_LINE("Line In", NULL),
  70         SND_SOC_DAPM_MIC("Mic Jack", NULL),
  71 };
  72
  73 static const struct snd_soc_dapm_route afeb9260_audio_map[] = {
  74         {"Headphone Jack", NULL, "LHPOUT"},
  75         {"Headphone Jack", NULL, "RHPOUT"},
  76
  77         {"LLINEIN", NULL, "Line In"},
  78         {"RLINEIN", NULL, "Line In"},
  79
  80         {"MICIN", NULL, "Mic Jack"},
  81 };
  82
  83
  84 /* Digital audio interface glue - connects codec <--> CPU */
  85 static struct snd_soc_dai_link afeb9260_dai = {
  86         .name = "TLV320AIC23",
  87         .stream_name = "AIC23",
  88         .cpu_dai_name = "atmel-ssc-dai.0",
  89         .codec_dai_name = "tlv320aic23-hifi",
  90         .platform_name = "atmel_pcm-audio",
  91         .codec_name = "tlv320aic23-codec.0-001a",
  92         .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_IF |
  93                    SND_SOC_DAIFMT_CBM_CFM,
  94         .ops = &afeb9260_ops,
  95 };
  96
  97 /* Audio machine driver */
  98 static struct snd_soc_card snd_soc_machine_afeb9260 = {
  99         .name = "AFEB9260",
 100         .owner = THIS_MODULE,
 101         .dai_link = &afeb9260_dai,
 102         .num_links = 1,
 103
 104         .dapm_widgets = tlv320aic23_dapm_widgets,
 105         .num_dapm_widgets = ARRAY_SIZE(tlv320aic23_dapm_widgets),
 106         .dapm_routes = afeb9260_audio_map,
 107         .num_dapm_routes = ARRAY_SIZE(afeb9260_audio_map),
 108 };
 109
 110 static struct platform_device *afeb9260_snd_device;
 111
 112 static int __init afeb9260_soc_init(void)
 113 {
 114         int err;
 115         struct device *dev;
 116
 117         if (!(machine_is_afeb9260()))
 118                 return -ENODEV;
 119
 120
 121         afeb9260_snd_device = platform_device_alloc("soc-audio", -1);
 122         if (!afeb9260_snd_device) {
 123                 printk(KERN_ERR "ASoC: Platform device allocation failed\n");
 124                 return -ENOMEM;
 125         }
 126
 127         platform_set_drvdata(afeb9260_snd_device, &snd_soc_machine_afeb9260);
 128         err = platform_device_add(afeb9260_snd_device);
 129         if (err)
 130                 goto err1;
 131
 132         dev = &afeb9260_snd_device->dev;
 133
 134         return 0;
 135 err1:
 136         platform_device_put(afeb9260_snd_device);
 137         return err;
 138 }
 139
 140 static void __exit afeb9260_soc_exit(void)
 141 {
 142         platform_device_unregister(afeb9260_snd_device);
 143 }
 144
 145 module_init(afeb9260_soc_init);
 146 module_exit(afeb9260_soc_exit);
 147
 148 MODULE_AUTHOR("Sergey Lapin <slapin@ossfans.org>");
 149 MODULE_DESCRIPTION("ALSA SoC for AFEB9260");
 150 MODULE_LICENSE("GPL");
 151