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 <mach/hardware.h>
  32 #include <linux/gpio.h>
  33 #include <plat/mcbsp.h>
  34
  35 #include "omap-mcbsp.h"
  36 #include "omap-pcm.h"
  37 #include "../codecs/tlv320aic23.h"
  38
  39 #define CODEC_CLOCK     12000000
  40
  41 static struct clk *tlv320aic23_mclk;
  42
  43 static int osk_startup(struct snd_pcm_substream *substream)
  44 {
  45         return clk_enable(tlv320aic23_mclk);
  46 }
  47
  48 static void osk_shutdown(struct snd_pcm_substream *substream)
  49 {
  50         clk_disable(tlv320aic23_mclk);
  51 }
  52
  53 static int osk_hw_params(struct snd_pcm_substream *substream,
  54                          struct snd_pcm_hw_params *params)
  55 {
  56         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  57         struct snd_soc_dai *codec_dai = rtd->codec_dai;
  58         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  59         int err;
  60
  61         /* Set codec DAI configuration */
  62         err = snd_soc_dai_set_fmt(codec_dai,
  63                                   SND_SOC_DAIFMT_DSP_B |
  64                                   SND_SOC_DAIFMT_NB_NF |
  65                                   SND_SOC_DAIFMT_CBM_CFM);
  66         if (err < 0) {
  67                 printk(KERN_ERR "can't set codec DAI configuration\n");
  68                 return err;
  69         }
  70
  71         /* Set cpu DAI configuration */
  72         err = snd_soc_dai_set_fmt(cpu_dai,
  73                                   SND_SOC_DAIFMT_DSP_B |
  74                                   SND_SOC_DAIFMT_NB_NF |
  75                                   SND_SOC_DAIFMT_CBM_CFM);
  76         if (err < 0) {
  77                 printk(KERN_ERR "can't set cpu DAI configuration\n");
  78                 return err;
  79         }
  80
  81         /* Set the codec system clock for DAC and ADC */
  82         err =
  83             snd_soc_dai_set_sysclk(codec_dai, 0, CODEC_CLOCK, SND_SOC_CLOCK_IN);
  84
  85         if (err < 0) {
  86                 printk(KERN_ERR "can't set codec system clock\n");
  87                 return err;
  88         }
  89
  90         return err;
  91 }
  92
  93 static struct snd_soc_ops osk_ops = {
  94         .startup = osk_startup,
  95         .hw_params = osk_hw_params,
  96         .shutdown = osk_shutdown,
  97 };
  98
  99 static const struct snd_soc_dapm_widget tlv320aic23_dapm_widgets[] = {
 100         SND_SOC_DAPM_HP("Headphone Jack", NULL),
 101         SND_SOC_DAPM_LINE("Line In", NULL),
 102         SND_SOC_DAPM_MIC("Mic Jack", NULL),
 103 };
 104
 105 static const struct snd_soc_dapm_route audio_map[] = {
 106         {"Headphone Jack", NULL, "LHPOUT"},
 107         {"Headphone Jack", NULL, "RHPOUT"},
 108
 109         {"LLINEIN", NULL, "Line In"},
 110         {"RLINEIN", NULL, "Line In"},
 111
 112         {"MICIN", NULL, "Mic Jack"},
 113 };
 114
 115 static int osk_tlv320aic23_init(struct snd_soc_pcm_runtime *rtd)
 116 {
 117         struct snd_soc_codec *codec = rtd->codec;
 118         struct snd_soc_dapm_context *dapm = &codec->dapm;
 119
 120         /* Add osk5912 specific widgets */
 121         snd_soc_dapm_new_controls(dapm, tlv320aic23_dapm_widgets,
 122                                   ARRAY_SIZE(tlv320aic23_dapm_widgets));
 123
 124         /* Set up osk5912 specific audio path audio_map */
 125         snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map));
 126
 127         snd_soc_dapm_enable_pin(dapm, "Headphone Jack");
 128         snd_soc_dapm_enable_pin(dapm, "Line In");
 129         snd_soc_dapm_enable_pin(dapm, "Mic Jack");
 130
 131         snd_soc_dapm_sync(dapm);
 132
 133         return 0;
 134 }
 135
 136 /* Digital audio interface glue - connects codec <--> CPU */
 137 static struct snd_soc_dai_link osk_dai = {
 138         .name = "TLV320AIC23",
 139         .stream_name = "AIC23",
 140         .cpu_dai_name = "omap-mcbsp-dai.0",
 141         .codec_dai_name = "tlv320aic23-hifi",
 142         .platform_name = "omap-pcm-audio",
 143         .codec_name = "tlv320aic23-codec",
 144         .init = osk_tlv320aic23_init,
 145         .ops = &osk_ops,
 146 };
 147
 148 /* Audio machine driver */
 149 static struct snd_soc_card snd_soc_card_osk = {
 150         .name = "OSK5912",
 151         .dai_link = &osk_dai,
 152         .num_links = 1,
 153 };
 154
 155 static struct platform_device *osk_snd_device;
 156
 157 static int __init osk_soc_init(void)
 158 {
 159         int err;
 160         u32 curRate;
 161         struct device *dev;
 162
 163         if (!(machine_is_omap_osk()))
 164                 return -ENODEV;
 165
 166         osk_snd_device = platform_device_alloc("soc-audio", -1);
 167         if (!osk_snd_device)
 168                 return -ENOMEM;
 169
 170         platform_set_drvdata(osk_snd_device, &snd_soc_card_osk);
 171         err = platform_device_add(osk_snd_device);
 172         if (err)
 173                 goto err1;
 174
 175         dev = &osk_snd_device->dev;
 176
 177         tlv320aic23_mclk = clk_get(dev, "mclk");
 178         if (IS_ERR(tlv320aic23_mclk)) {
 179                 printk(KERN_ERR "Could not get mclk clock\n");
 180                 err = PTR_ERR(tlv320aic23_mclk);
 181                 goto err2;
 182         }
 183
 184         /*
 185          * Configure 12 MHz output on MCLK.
 186          */
 187         curRate = (uint) clk_get_rate(tlv320aic23_mclk);
 188         if (curRate != CODEC_CLOCK) {
 189                 if (clk_set_rate(tlv320aic23_mclk, CODEC_CLOCK)) {
 190                         printk(KERN_ERR "Cannot set MCLK for AIC23 CODEC\n");
 191                         err = -ECANCELED;
 192                         goto err3;
 193                 }
 194         }
 195
 196         printk(KERN_INFO "MCLK = %d [%d]\n",
 197                (uint) clk_get_rate(tlv320aic23_mclk), CODEC_CLOCK);
 198
 199         return 0;
 200
 201 err3:
 202         clk_put(tlv320aic23_mclk);
 203 err2:
 204         platform_device_del(osk_snd_device);
 205 err1:
 206         platform_device_put(osk_snd_device);
 207
 208         return err;
 209
 210 }
 211
 212 static void __exit osk_soc_exit(void)
 213 {
 214         clk_put(tlv320aic23_mclk);
 215         platform_device_unregister(osk_snd_device);
 216 }
 217
 218 module_init(osk_soc_init);
 219 module_exit(osk_soc_exit);
 220
 221 MODULE_AUTHOR("Arun KS <arunks@mistralsolutions.com>");
 222 MODULE_DESCRIPTION("ALSA SoC OSK 5912");
 223 MODULE_LICENSE("GPL");