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 <mach/hardware.h>
  32#include <linux/gpio.h>
  33#include <linux/module.h>
  34#include <linux/platform_data/asoc-ti-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
  42static struct clk *tlv320aic23_mclk;
  43
  44static int osk_startup(struct snd_pcm_substream *substream)
  45{
  46        return clk_enable(tlv320aic23_mclk);
  47}
  48
  49static void osk_shutdown(struct snd_pcm_substream *substream)
  50{
  51        clk_disable(tlv320aic23_mclk);
  52}
  53
  54static 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
  73static struct snd_soc_ops osk_ops = {
  74        .startup = osk_startup,
  75        .hw_params = osk_hw_params,
  76        .shutdown = osk_shutdown,
  77};
  78
  79static 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
  85static 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 */
  96static 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 */
 109static 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
 121static struct platform_device *osk_snd_device;
 122
 123static 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
 167err3:
 168        clk_put(tlv320aic23_mclk);
 169err2:
 170        platform_device_del(osk_snd_device);
 171err1:
 172        platform_device_put(osk_snd_device);
 173
 174        return err;
 175
 176}
 177
 178static void __exit osk_soc_exit(void)
 179{
 180        clk_put(tlv320aic23_mclk);
 181        platform_device_unregister(osk_snd_device);
 182}
 183
 184module_init(osk_soc_init);
 185module_exit(osk_soc_exit);
 186
 187MODULE_AUTHOR("Arun KS <arunks@mistralsolutions.com>");
 188MODULE_DESCRIPTION("ALSA SoC OSK 5912");
 189MODULE_LICENSE("GPL");
 190