release/src-rt-6.x.4708/linux/linux-2.6.36/sound/soc/blackfin/bf5xx-ad1980.c

   1 /*
   2  * File:         sound/soc/blackfin/bf5xx-ad1980.c
   3  * Author:       Cliff Cai <Cliff.Cai@analog.com>
   4  *
   5  * Created:      Tue June 06 2008
   6  * Description:  Board driver for AD1980/1 audio codec
   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 /*
  30  * WARNING:
  31  *
  32  * Because Analog Devices Inc. discontinued the ad1980 sound chip since
  33  * Sep. 2009, this ad1980 driver is not maintained, tested and supported
  34  * by ADI now.
  35  */
  36
  37 #include <linux/module.h>
  38 #include <linux/moduleparam.h>
  39 #include <linux/device.h>
  40 #include <asm/dma.h>
  41
  42 #include <sound/core.h>
  43 #include <sound/pcm.h>
  44 #include <sound/soc.h>
  45
  46 #include <linux/gpio.h>
  47 #include <asm/portmux.h>
  48
  49 #include "../codecs/ad1980.h"
  50 #include "bf5xx-sport.h"
  51 #include "bf5xx-ac97-pcm.h"
  52 #include "bf5xx-ac97.h"
  53
  54 static struct snd_soc_card bf5xx_board;
  55
  56 static int bf5xx_board_startup(struct snd_pcm_substream *substream)
  57 {
  58         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  59         struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
  60
  61         pr_debug("%s enter\n", __func__);
  62         cpu_dai->private_data = sport_handle;
  63         return 0;
  64 }
  65
  66 static struct snd_soc_ops bf5xx_board_ops = {
  67         .startup = bf5xx_board_startup,
  68 };
  69
  70 static struct snd_soc_dai_link bf5xx_board_dai = {
  71         .name = "AC97",
  72         .stream_name = "AC97 HiFi",
  73         .cpu_dai = &bfin_ac97_dai,
  74         .codec_dai = &ad1980_dai,
  75         .ops = &bf5xx_board_ops,
  76 };
  77
  78 static struct snd_soc_card bf5xx_board = {
  79         .name = "bf5xx-board",
  80         .platform = &bf5xx_ac97_soc_platform,
  81         .dai_link = &bf5xx_board_dai,
  82         .num_links = 1,
  83 };
  84
  85 static struct snd_soc_device bf5xx_board_snd_devdata = {
  86         .card = &bf5xx_board,
  87         .codec_dev = &soc_codec_dev_ad1980,
  88 };
  89
  90 static struct platform_device *bf5xx_board_snd_device;
  91
  92 static int __init bf5xx_board_init(void)
  93 {
  94         int ret;
  95
  96         bf5xx_board_snd_device = platform_device_alloc("soc-audio", -1);
  97         if (!bf5xx_board_snd_device)
  98                 return -ENOMEM;
  99
 100         platform_set_drvdata(bf5xx_board_snd_device, &bf5xx_board_snd_devdata);
 101         bf5xx_board_snd_devdata.dev = &bf5xx_board_snd_device->dev;
 102         ret = platform_device_add(bf5xx_board_snd_device);
 103
 104         if (ret)
 105                 platform_device_put(bf5xx_board_snd_device);
 106
 107         return ret;
 108 }
 109
 110 static void __exit bf5xx_board_exit(void)
 111 {
 112         platform_device_unregister(bf5xx_board_snd_device);
 113 }
 114
 115 module_init(bf5xx_board_init);
 116 module_exit(bf5xx_board_exit);
 117
 118 /* Module information */
 119 MODULE_AUTHOR("Cliff Cai");
 120 MODULE_DESCRIPTION("ALSA SoC AD1980/1 BF5xx board (Obsolete)");
 121 MODULE_LICENSE("GPL");