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