release/src-rt-6.x.4708/linux/linux-2.6.36/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 #include <sound/soc-dapm.h>
  30
  31 #include <asm/mach-types.h>
  32 #include <mach/hardware.h>
  33 #include <linux/gpio.h>
  34 #include <plat/mcbsp.h>
  35
  36 #include "omap-mcbsp.h"
  37 #include "omap-pcm.h"
  38 #include "../codecs/tlv320aic23.h"
  39
  40 #define CODEC_CLOCK     12000000
  41
  42 static struct clk *tlv320aic23_mclk;
  43
  44 static int osk_startup(struct snd_pcm_substream *substream)
  45 {
  46         return clk_enable(tlv320aic23_mclk);
  47 }
  48
  49 static void osk_shutdown(struct snd_pcm_substream *substream)
  50 {
  51         clk_disable(tlv320aic23_mclk);
  52 }
  53
  54 static int osk_hw_params(struct snd_pcm_substream *substream,
  55                          struct snd_pcm_hw_params *params)
  56 {
  57         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  58         struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
  59         struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
  60         int err;
  61
  62         /* Set codec DAI configuration */
  63         err = snd_soc_dai_set_fmt(codec_dai,
  64                                   SND_SOC_DAIFMT_DSP_B |
  65                                   SND_SOC_DAIFMT_NB_NF |
  66                                   SND_SOC_DAIFMT_CBM_CFM);
  67         if (err < 0) {
  68                 printk(KERN_ERR "can't set codec DAI configuration\n");
  69                 return err;
  70         }
  71
  72         /* Set cpu DAI configuration */
  73         err = snd_soc_dai_set_fmt(cpu_dai,
  74                                   SND_SOC_DAIFMT_DSP_B |
  75                                   SND_SOC_DAIFMT_NB_NF |
  76                                   SND_SOC_DAIFMT_CBM_CFM);
  77         if (err < 0) {
  78                 printk(KERN_ERR "can't set cpu DAI configuration\n");
  79                 return err;
  80         }
  81
  82         /* Set the codec system clock for DAC and ADC */
  83         err =
  84             snd_soc_dai_set_sysclk(codec_dai, 0, CODEC_CLOCK, SND_SOC_CLOCK_IN);
  85
  86         if (err < 0) {
  87                 printk(KERN_ERR "can't set codec system clock\n");
  88                 return err;
  89         }
  90
  91         return err;
  92 }
  93
  94 static struct snd_soc_ops osk_ops = {
  95         .startup = osk_startup,
  96         .hw_params = osk_hw_params,
  97         .shutdown = osk_shutdown,
  98 };
  99
 100 static const struct snd_soc_dapm_widget tlv320aic23_dapm_widgets[] = {
 101         SND_SOC_DAPM_HP("Headphone Jack", NULL),
 102         SND_SOC_DAPM_LINE("Line In", NULL),
 103         SND_SOC_DAPM_MIC("Mic Jack", NULL),
 104 };
 105
 106 static const struct snd_soc_dapm_route audio_map[] = {
 107         {"Headphone Jack", NULL, "LHPOUT"},
 108         {"Headphone Jack", NULL, "RHPOUT"},
 109
 110         {"LLINEIN", NULL, "Line In"},
 111         {"RLINEIN", NULL, "Line In"},
 112
 113         {"MICIN", NULL, "Mic Jack"},
 114 };
 115
 116 static int osk_tlv320aic23_init(struct snd_soc_codec *codec)
 117 {
 118
 119         /* Add osk5912 specific widgets */
 120         snd_soc_dapm_new_controls(codec, tlv320aic23_dapm_widgets,
 121                                   ARRAY_SIZE(tlv320aic23_dapm_widgets));
 122
 123         /* Set up osk5912 specific audio path audio_map */
 124         snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
 125
 126         snd_soc_dapm_enable_pin(codec, "Headphone Jack");
 127         snd_soc_dapm_enable_pin(codec, "Line In");
 128         snd_soc_dapm_enable_pin(codec, "Mic Jack");
 129
 130         snd_soc_dapm_sync(codec);
 131
 132         return 0;
 133 }
 134
 135 /* Digital audio interface glue - connects codec <--> CPU */
 136 static struct snd_soc_dai_link osk_dai = {
 137         .name = "TLV320AIC23",
 138         .stream_name = "AIC23",
 139         .cpu_dai = &omap_mcbsp_dai[0],
 140         .codec_dai = &tlv320aic23_dai,
 141         .init = osk_tlv320aic23_init,
 142         .ops = &osk_ops,
 143 };
 144
 145 /* Audio machine driver */
 146 static struct snd_soc_card snd_soc_card_osk = {
 147         .name = "OSK5912",
 148         .platform = &omap_soc_platform,
 149         .dai_link = &osk_dai,
 150         .num_links = 1,
 151 };
 152
 153 /* Audio subsystem */
 154 static struct snd_soc_device osk_snd_devdata = {
 155         .card = &snd_soc_card_osk,
 156         .codec_dev = &soc_codec_dev_tlv320aic23,
 157 };
 158
 159 static struct platform_device *osk_snd_device;
 160
 161 static int __init osk_soc_init(void)
 162 {
 163         int err;
 164         u32 curRate;
 165         struct device *dev;
 166
 167         if (!(machine_is_omap_osk()))
 168                 return -ENODEV;
 169
 170         osk_snd_device = platform_device_alloc("soc-audio", -1);
 171         if (!osk_snd_device)
 172                 return -ENOMEM;
 173
 174         platform_set_drvdata(osk_snd_device, &osk_snd_devdata);
 175         osk_snd_devdata.dev = &osk_snd_device->dev;
 176         *(unsigned int *)osk_dai.cpu_dai->private_data = 0;     /* McBSP1 */
 177         err = platform_device_add(osk_snd_device);
 178         if (err)
 179                 goto err1;
 180
 181         dev = &osk_snd_device->dev;
 182
 183         tlv320aic23_mclk = clk_get(dev, "mclk");
 184         if (IS_ERR(tlv320aic23_mclk)) {
 185                 printk(KERN_ERR "Could not get mclk clock\n");
 186                 return -ENODEV;
 187         }
 188
 189         /*
 190          * Configure 12 MHz output on MCLK.
 191          */
 192         curRate = (uint) clk_get_rate(tlv320aic23_mclk);
 193         if (curRate != CODEC_CLOCK) {
 194                 if (clk_set_rate(tlv320aic23_mclk, CODEC_CLOCK)) {
 195                         printk(KERN_ERR "Cannot set MCLK for AIC23 CODEC\n");
 196                         err = -ECANCELED;
 197                         goto err1;
 198                 }
 199         }
 200
 201         printk(KERN_INFO "MCLK = %d [%d]\n",
 202                (uint) clk_get_rate(tlv320aic23_mclk), CODEC_CLOCK);
 203
 204         return 0;
 205 err1:
 206         clk_put(tlv320aic23_mclk);
 207         platform_device_del(osk_snd_device);
 208         platform_device_put(osk_snd_device);
 209
 210         return err;
 211
 212 }
 213
 214 static void __exit osk_soc_exit(void)
 215 {
 216         platform_device_unregister(osk_snd_device);
 217 }
 218
 219 module_init(osk_soc_init);
 220 module_exit(osk_soc_exit);
 221
 222 MODULE_AUTHOR("Arun KS <arunks@mistralsolutions.com>");
 223 MODULE_DESCRIPTION("ALSA SoC OSK 5912");
 224 MODULE_LICENSE("GPL");