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 <linux/module.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->codec_dai;
  59         int err;
  60
  61         /* Set the codec system clock for DAC and ADC */
  62         err =
  63             snd_soc_dai_set_sysclk(codec_dai, 0, CODEC_CLOCK, SND_SOC_CLOCK_IN);
  64
  65         if (err < 0) {
  66                 printk(KERN_ERR "can't set codec system clock\n");
  67                 return err;
  68         }
  69
  70         return err;
  71 }
  72
  73 static struct snd_soc_ops osk_ops = {
  74         .startup = osk_startup,
  75         .hw_params = osk_hw_params,
  76         .shutdown = osk_shutdown,
  77 };
  78
  79 static const struct snd_soc_dapm_widget tlv320aic23_dapm_widgets[] = {
  80         SND_SOC_DAPM_HP("Headphone Jack", NULL),
  81         SND_SOC_DAPM_LINE("Line In", NULL),
  82         SND_SOC_DAPM_MIC("Mic Jack", NULL),
  83 };
  84
  85 static const struct snd_soc_dapm_route audio_map[] = {
  86         {"Headphone Jack", NULL, "LHPOUT"},
  87         {"Headphone Jack", NULL, "RHPOUT"},
  88
  89         {"LLINEIN", NULL, "Line In"},
  90         {"RLINEIN", NULL, "Line In"},
  91
  92         {"MICIN", NULL, "Mic Jack"},
  93 };
  94
  95 /* Digital audio interface glue - connects codec <--> CPU */
  96 static struct snd_soc_dai_link osk_dai = {
  97         .name = "TLV320AIC23",
  98         .stream_name = "AIC23",
  99         .cpu_dai_name = "omap-mcbsp.1",
 100         .codec_dai_name = "tlv320aic23-hifi",
 101         .platform_name = "omap-pcm-audio",
 102         .codec_name = "tlv320aic23-codec",
 103         .dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_NB_NF |
 104                    SND_SOC_DAIFMT_CBM_CFM,
 105         .ops = &osk_ops,
 106 };
 107
 108 /* Audio machine driver */
 109 static struct snd_soc_card snd_soc_card_osk = {
 110         .name = "OSK5912",
 111         .owner = THIS_MODULE,
 112         .dai_link = &osk_dai,
 113         .num_links = 1,
 114
 115         .dapm_widgets = tlv320aic23_dapm_widgets,
 116         .num_dapm_widgets = ARRAY_SIZE(tlv320aic23_dapm_widgets),
 117         .dapm_routes = audio_map,
 118         .num_dapm_routes = ARRAY_SIZE(audio_map),
 119 };
 120
 121 static struct platform_device *osk_snd_device;
 122
 123 static int __init osk_soc_init(void)
 124 {
 125         int err;
 126         u32 curRate;
 127         struct device *dev;
 128
 129         if (!(machine_is_omap_osk()))
 130                 return -ENODEV;
 131
 132         osk_snd_device = platform_device_alloc("soc-audio", -1);
 133         if (!osk_snd_device)
 134                 return -ENOMEM;
 135
 136         platform_set_drvdata(osk_snd_device, &snd_soc_card_osk);
 137         err = platform_device_add(osk_snd_device);
 138         if (err)
 139                 goto err1;
 140
 141         dev = &osk_snd_device->dev;
 142
 143         tlv320aic23_mclk = clk_get(dev, "mclk");
 144         if (IS_ERR(tlv320aic23_mclk)) {
 145                 printk(KERN_ERR "Could not get mclk clock\n");
 146                 err = PTR_ERR(tlv320aic23_mclk);
 147                 goto err2;
 148         }
 149
 150         /*
 151          * Configure 12 MHz output on MCLK.
 152          */
 153         curRate = (uint) clk_get_rate(tlv320aic23_mclk);
 154         if (curRate != CODEC_CLOCK) {
 155                 if (clk_set_rate(tlv320aic23_mclk, CODEC_CLOCK)) {
 156                         printk(KERN_ERR "Cannot set MCLK for AIC23 CODEC\n");
 157                         err = -ECANCELED;
 158                         goto err3;
 159                 }
 160         }
 161
 162         printk(KERN_INFO "MCLK = %d [%d]\n",
 163                (uint) clk_get_rate(tlv320aic23_mclk), CODEC_CLOCK);
 164
 165         return 0;
 166
 167 err3:
 168         clk_put(tlv320aic23_mclk);
 169 err2:
 170         platform_device_del(osk_snd_device);
 171 err1:
 172         platform_device_put(osk_snd_device);
 173
 174         return err;
 175
 176 }
 177
 178 static void __exit osk_soc_exit(void)
 179 {
 180         clk_put(tlv320aic23_mclk);
 181         platform_device_unregister(osk_snd_device);
 182 }
 183
 184 module_init(osk_soc_init);
 185 module_exit(osk_soc_exit);
 186
 187 MODULE_AUTHOR("Arun KS <arunks@mistralsolutions.com>");
 188 MODULE_DESCRIPTION("ALSA SoC OSK 5912");
 189 MODULE_LICENSE("GPL");