kernel/sound/soc/omap/osk5912.c

   1 /*
   2  * osk5912.c  --  SoC audio for OSK 5912
   3  *
   4  * Copyright (C) 2008 Mistral Solutions
   5  *
   6  * Contact: Arun KS  <arunks@mistralsolutions.com>
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License
  10  * version 2 as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  20  * 02110-1301 USA
  21  *
  22  */
  23
  24 #include <linux/clk.h>
  25 #include <linux/platform_device.h>
  26 #include <sound/core.h>
  27 #include <sound/pcm.h>
  28 #include <sound/soc.h>
  29
  30 #include <asm/mach-types.h>
  31 #include <linux/gpio.h>
  32 #include <linux/module.h>
  33 #include <linux/platform_data/asoc-ti-mcbsp.h>
  34
  35 #include "omap-mcbsp.h"
  36 #include "../codecs/tlv320aic23.h"
  37
  38 #define CODEC_CLOCK     12000000
  39
  40 static struct clk *tlv320aic23_mclk;
  41
  42 static int osk_startup(struct snd_pcm_substream *substream)
  43 {
  44         return clk_enable(tlv320aic23_mclk);
  45 }
  46
  47 static void osk_shutdown(struct snd_pcm_substream *substream)
  48 {
  49         clk_disable(tlv320aic23_mclk);
  50 }
  51
  52 static int osk_hw_params(struct snd_pcm_substream *substream,
  53                          struct snd_pcm_hw_params *params)
  54 {
  55         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  56         struct snd_soc_dai *codec_dai = rtd->codec_dai;
  57         int err;
  58
  59         /* Set the codec system clock for DAC and ADC */
  60         err =
  61             snd_soc_dai_set_sysclk(codec_dai, 0, CODEC_CLOCK, SND_SOC_CLOCK_IN);
  62
  63         if (err < 0) {
  64                 printk(KERN_ERR "can't set codec system clock\n");
  65                 return err;
  66         }
  67
  68         return err;
  69 }
  70
  71 static struct snd_soc_ops osk_ops = {
  72         .startup = osk_startup,
  73         .hw_params = osk_hw_params,
  74         .shutdown = osk_shutdown,
  75 };
  76
  77 static const struct snd_soc_dapm_widget tlv320aic23_dapm_widgets[] = {
  78         SND_SOC_DAPM_HP("Headphone Jack", NULL),
  79         SND_SOC_DAPM_LINE("Line In", NULL),
  80         SND_SOC_DAPM_MIC("Mic Jack", NULL),
  81 };
  82
  83 static const struct snd_soc_dapm_route audio_map[] = {
  84         {"Headphone Jack", NULL, "LHPOUT"},
  85         {"Headphone Jack", NULL, "RHPOUT"},
  86
  87         {"LLINEIN", NULL, "Line In"},
  88         {"RLINEIN", NULL, "Line In"},
  89
  90         {"MICIN", NULL, "Mic Jack"},
  91 };
  92
  93 /* Digital audio interface glue - connects codec <--> CPU */
  94 static struct snd_soc_dai_link osk_dai = {
  95         .name = "TLV320AIC23",
  96         .stream_name = "AIC23",
  97         .cpu_dai_name = "omap-mcbsp.1",
  98         .codec_dai_name = "tlv320aic23-hifi",
  99         .platform_name = "omap-mcbsp.1",
 100         .codec_name = "tlv320aic23-codec",
 101         .dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_NB_NF |
 102                    SND_SOC_DAIFMT_CBM_CFM,
 103         .ops = &osk_ops,
 104 };
 105
 106 /* Audio machine driver */
 107 static struct snd_soc_card snd_soc_card_osk = {
 108         .name = "OSK5912",
 109         .owner = THIS_MODULE,
 110         .dai_link = &osk_dai,
 111         .num_links = 1,
 112
 113         .dapm_widgets = tlv320aic23_dapm_widgets,
 114         .num_dapm_widgets = ARRAY_SIZE(tlv320aic23_dapm_widgets),
 115         .dapm_routes = audio_map,
 116         .num_dapm_routes = ARRAY_SIZE(audio_map),
 117 };
 118
 119 static struct platform_device *osk_snd_device;
 120
 121 static int __init osk_soc_init(void)
 122 {
 123         int err;
 124         u32 curRate;
 125         struct device *dev;
 126
 127         if (!(machine_is_omap_osk()))
 128                 return -ENODEV;
 129
 130         osk_snd_device = platform_device_alloc("soc-audio", -1);
 131         if (!osk_snd_device)
 132                 return -ENOMEM;
 133
 134         platform_set_drvdata(osk_snd_device, &snd_soc_card_osk);
 135         err = platform_device_add(osk_snd_device);
 136         if (err)
 137                 goto err1;
 138
 139         dev = &osk_snd_device->dev;
 140
 141         tlv320aic23_mclk = clk_get(dev, "mclk");
 142         if (IS_ERR(tlv320aic23_mclk)) {
 143                 printk(KERN_ERR "Could not get mclk clock\n");
 144                 err = PTR_ERR(tlv320aic23_mclk);
 145                 goto err2;
 146         }
 147
 148         /*
 149          * Configure 12 MHz output on MCLK.
 150          */
 151         curRate = (uint) clk_get_rate(tlv320aic23_mclk);
 152         if (curRate != CODEC_CLOCK) {
 153                 if (clk_set_rate(tlv320aic23_mclk, CODEC_CLOCK)) {
 154                         printk(KERN_ERR "Cannot set MCLK for AIC23 CODEC\n");
 155                         err = -ECANCELED;
 156                         goto err3;
 157                 }
 158         }
 159
 160         printk(KERN_INFO "MCLK = %d [%d]\n",
 161                (uint) clk_get_rate(tlv320aic23_mclk), CODEC_CLOCK);
 162
 163         return 0;
 164
 165 err3:
 166         clk_put(tlv320aic23_mclk);
 167 err2:
 168         platform_device_del(osk_snd_device);
 169 err1:
 170         platform_device_put(osk_snd_device);
 171
 172         return err;
 173
 174 }
 175
 176 static void __exit osk_soc_exit(void)
 177 {
 178         clk_put(tlv320aic23_mclk);
 179         platform_device_unregister(osk_snd_device);
 180 }
 181
 182 module_init(osk_soc_init);
 183 module_exit(osk_soc_exit);
 184
 185 MODULE_AUTHOR("Arun KS <arunks@mistralsolutions.com>");
 186 MODULE_DESCRIPTION("ALSA SoC OSK 5912");
 187 MODULE_LICENSE("GPL");