LXR linux/sound/soc/blackfin/bf5xx-ssm2602.c

   1/*
   2 * File:         sound/soc/blackfin/bf5xx-ssm2602.c
   3 * Author:       Cliff Cai <Cliff.Cai@analog.com>
   4 *
   5 * Created:      Tue June 06 2008
   6 * Description:  board driver for SSM2602 sound chip
   7 *
   8 * Modified:
   9 *               Copyright 2008 Analog Devices Inc.
  10 *
  11 * Bugs:         Enter bugs at http://blackfin.uclinux.org/
  12 *
  13 * This program is free software; you can redistribute it and/or modify
  14 * it under the terms of the GNU General Public License as published by
  15 * the Free Software Foundation; either version 2 of the License, or
  16 * (at your option) any later version.
  17 *
  18 * This program is distributed in the hope that it will be useful,
  19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21 * GNU General Public License for more details.
  22 *
  23 * You should have received a copy of the GNU General Public License
  24 * along with this program; if not, see the file COPYING, or write
  25 * to the Free Software Foundation, Inc.,
  26 * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  27 */
  28
  29#include <linux/module.h>
  30#include <linux/moduleparam.h>
  31#include <linux/device.h>
  32
  33#include <sound/core.h>
  34#include <sound/pcm.h>
  35#include <sound/soc.h>
  36#include <sound/pcm_params.h>
  37
  38#include <asm/dma.h>
  39#include <asm/portmux.h>
  40#include <linux/gpio.h>
  41#include "../codecs/ssm2602.h"
  42#include "bf5xx-sport.h"
  43
  44static struct snd_soc_card bf5xx_ssm2602;
  45
  46static int bf5xx_ssm2602_dai_init(struct snd_soc_pcm_runtime *rtd)
  47{
  48        /*
  49         * If you are using a crystal source which frequency is not 12MHz
  50         * then modify the below case statement with frequency of the crystal.
  51         *
  52         * If you are using the SPORT to generate clocking then this is
  53         * where to do it.
  54         */
  55        return snd_soc_dai_set_sysclk(rtd->codec_dai, SSM2602_SYSCLK, 12000000,
  56                SND_SOC_CLOCK_IN);
  57}
  58
  59/* CODEC is master for BCLK and LRC in this configuration. */
  60#define BF5XX_SSM2602_DAIFMT (SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | \
  61                                SND_SOC_DAIFMT_CBM_CFM)
  62
  63static struct snd_soc_dai_link bf5xx_ssm2602_dai[] = {
  64        {
  65                .name = "ssm2602",
  66                .stream_name = "SSM2602",
  67                .cpu_dai_name = "bfin-i2s.0",
  68                .codec_dai_name = "ssm2602-hifi",
  69                .platform_name = "bfin-i2s-pcm-audio",
  70                .codec_name = "ssm2602.0-001b",
  71                .init = bf5xx_ssm2602_dai_init,
  72                .dai_fmt = BF5XX_SSM2602_DAIFMT,
  73        },
  74        {
  75                .name = "ssm2602",
  76                .stream_name = "SSM2602",
  77                .cpu_dai_name = "bfin-i2s.1",
  78                .codec_dai_name = "ssm2602-hifi",
  79                .platform_name = "bfin-i2s-pcm-audio",
  80                .codec_name = "ssm2602.0-001b",
  81                .init = bf5xx_ssm2602_dai_init,
  82                .dai_fmt = BF5XX_SSM2602_DAIFMT,
  83        },
  84};
  85
  86static struct snd_soc_card bf5xx_ssm2602 = {
  87        .name = "bfin-ssm2602",
  88        .owner = THIS_MODULE,
  89        .dai_link = &bf5xx_ssm2602_dai[CONFIG_SND_BF5XX_SPORT_NUM],
  90        .num_links = 1,
  91};
  92
  93static struct platform_device *bf5xx_ssm2602_snd_device;
  94
  95static int __init bf5xx_ssm2602_init(void)
  96{
  97        int ret;
  98
  99        pr_debug("%s enter\n", __func__);
 100        bf5xx_ssm2602_snd_device = platform_device_alloc("soc-audio", -1);
 101        if (!bf5xx_ssm2602_snd_device)
 102                return -ENOMEM;
 103
 104        platform_set_drvdata(bf5xx_ssm2602_snd_device, &bf5xx_ssm2602);
 105        ret = platform_device_add(bf5xx_ssm2602_snd_device);
 106
 107        if (ret)
 108                platform_device_put(bf5xx_ssm2602_snd_device);
 109
 110        return ret;
 111}
 112
 113static void __exit bf5xx_ssm2602_exit(void)
 114{
 115        pr_debug("%s enter\n", __func__);
 116        platform_device_unregister(bf5xx_ssm2602_snd_device);
 117}
 118
 119module_init(bf5xx_ssm2602_init);
 120module_exit(bf5xx_ssm2602_exit);
 121
 122/* Module information */
 123MODULE_AUTHOR("Cliff Cai");
 124MODULE_DESCRIPTION("ALSA SoC SSM2602 BF527-EZKIT");
 125MODULE_LICENSE("GPL");
 126
 127