LXR linux/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
  40static struct clk *tlv320aic23_mclk;
  41
  42static int osk_startup(struct snd_pcm_substream *substream)
  43{
  44        return clk_enable(tlv320aic23_mclk);
  45}
  46
  47static void osk_shutdown(struct snd_pcm_substream *substream)
  48{
  49        clk_disable(tlv320aic23_mclk);
  50}
  51
  52static 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
  71static struct snd_soc_ops osk_ops = {
  72        .startup = osk_startup,
  73        .hw_params = osk_hw_params,
  74        .shutdown = osk_shutdown,
  75};
  76
  77static 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
  83static 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 */
  94static 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-pcm-audio",
 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 */
 107static 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
 119static struct platform_device *osk_snd_device;
 120
 121static 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
 165err3:
 166        clk_put(tlv320aic23_mclk);
 167err2:
 168        platform_device_del(osk_snd_device);
 169err1:
 170        platform_device_put(osk_snd_device);
 171
 172        return err;
 173
 174}
 175
 176static void __exit osk_soc_exit(void)
 177{
 178        clk_put(tlv320aic23_mclk);
 179        platform_device_unregister(osk_snd_device);
 180}
 181
 182module_init(osk_soc_init);
 183module_exit(osk_soc_exit);
 184
 185MODULE_AUTHOR("Arun KS <arunks@mistralsolutions.com>");
 186MODULE_DESCRIPTION("ALSA SoC OSK 5912");
 187MODULE_LICENSE("GPL");
 188