release/src-rt-6.x.4708/linux/linux-2.6.36/sound/soc/s3c24xx/jive_wm8750.c

   1 /* sound/soc/s3c24xx/jive_wm8750.c
   2  *
   3  * Copyright 2007,2008 Simtec Electronics
   4  *
   5  * Based on sound/soc/pxa/spitz.c
   6  *      Copyright 2005 Wolfson Microelectronics PLC.
   7  *      Copyright 2005 Openedhand Ltd.
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12 */
  13
  14 #include <linux/module.h>
  15 #include <linux/moduleparam.h>
  16 #include <linux/timer.h>
  17 #include <linux/interrupt.h>
  18 #include <linux/platform_device.h>
  19 #include <linux/clk.h>
  20
  21 #include <sound/core.h>
  22 #include <sound/pcm.h>
  23 #include <sound/soc.h>
  24 #include <sound/soc-dapm.h>
  25
  26 #include <asm/mach-types.h>
  27
  28 #include "s3c-dma.h"
  29 #include "s3c2412-i2s.h"
  30
  31 #include "../codecs/wm8750.h"
  32
  33 static const struct snd_soc_dapm_route audio_map[] = {
  34         { "Headphone Jack", NULL, "LOUT1" },
  35         { "Headphone Jack", NULL, "ROUT1" },
  36         { "Internal Speaker", NULL, "LOUT2" },
  37         { "Internal Speaker", NULL, "ROUT2" },
  38         { "LINPUT1", NULL, "Line Input" },
  39         { "RINPUT1", NULL, "Line Input" },
  40 };
  41
  42 static const struct snd_soc_dapm_widget wm8750_dapm_widgets[] = {
  43         SND_SOC_DAPM_HP("Headphone Jack", NULL),
  44         SND_SOC_DAPM_SPK("Internal Speaker", NULL),
  45         SND_SOC_DAPM_LINE("Line In", NULL),
  46 };
  47
  48 static int jive_hw_params(struct snd_pcm_substream *substream,
  49                           struct snd_pcm_hw_params *params)
  50 {
  51         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  52         struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
  53         struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
  54         struct s3c_i2sv2_rate_calc div;
  55         unsigned int clk = 0;
  56         int ret = 0;
  57
  58         switch (params_rate(params)) {
  59         case 8000:
  60         case 16000:
  61         case 48000:
  62         case 96000:
  63                 clk = 12288000;
  64                 break;
  65         case 11025:
  66         case 22050:
  67         case 44100:
  68                 clk = 11289600;
  69                 break;
  70         }
  71
  72         s3c_i2sv2_iis_calc_rate(&div, NULL, params_rate(params),
  73                                 s3c_i2sv2_get_clock(cpu_dai));
  74
  75         /* set codec DAI configuration */
  76         ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
  77                                   SND_SOC_DAIFMT_NB_NF |
  78                                   SND_SOC_DAIFMT_CBS_CFS);
  79         if (ret < 0)
  80                 return ret;
  81
  82         /* set cpu DAI configuration */
  83         ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
  84                                   SND_SOC_DAIFMT_NB_NF |
  85                                   SND_SOC_DAIFMT_CBS_CFS);
  86         if (ret < 0)
  87                 return ret;
  88
  89         /* set the codec system clock for DAC and ADC */
  90         ret = snd_soc_dai_set_sysclk(codec_dai, WM8750_SYSCLK, clk,
  91                                      SND_SOC_CLOCK_IN);
  92         if (ret < 0)
  93                 return ret;
  94
  95         ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C2412_DIV_RCLK, div.fs_div);
  96         if (ret < 0)
  97                 return ret;
  98
  99         ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C2412_DIV_PRESCALER,
 100                                      div.clk_div - 1);
 101         if (ret < 0)
 102                 return ret;
 103
 104         return 0;
 105 }
 106
 107 static struct snd_soc_ops jive_ops = {
 108         .hw_params      = jive_hw_params,
 109 };
 110
 111 static int jive_wm8750_init(struct snd_soc_codec *codec)
 112 {
 113         int err;
 114
 115         /* These endpoints are not being used. */
 116         snd_soc_dapm_nc_pin(codec, "LINPUT2");
 117         snd_soc_dapm_nc_pin(codec, "RINPUT2");
 118         snd_soc_dapm_nc_pin(codec, "LINPUT3");
 119         snd_soc_dapm_nc_pin(codec, "RINPUT3");
 120         snd_soc_dapm_nc_pin(codec, "OUT3");
 121         snd_soc_dapm_nc_pin(codec, "MONO");
 122
 123         /* Add jive specific widgets */
 124         err = snd_soc_dapm_new_controls(codec, wm8750_dapm_widgets,
 125                                         ARRAY_SIZE(wm8750_dapm_widgets));
 126         if (err) {
 127                 printk(KERN_ERR "%s: failed to add widgets (%d)\n",
 128                        __func__, err);
 129                 return err;
 130         }
 131
 132         snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
 133         snd_soc_dapm_sync(codec);
 134
 135         return 0;
 136 }
 137
 138 static struct snd_soc_dai_link jive_dai = {
 139         .name           = "wm8750",
 140         .stream_name    = "WM8750",
 141         .cpu_dai        = &s3c2412_i2s_dai,
 142         .codec_dai      = &wm8750_dai,
 143         .init           = jive_wm8750_init,
 144         .ops            = &jive_ops,
 145 };
 146
 147 /* jive audio machine driver */
 148 static struct snd_soc_card snd_soc_machine_jive = {
 149         .name           = "Jive",
 150         .platform       = &s3c24xx_soc_platform,
 151         .dai_link       = &jive_dai,
 152         .num_links      = 1,
 153 };
 154
 155 /* jive audio subsystem */
 156 static struct snd_soc_device jive_snd_devdata = {
 157         .card           = &snd_soc_machine_jive,
 158         .codec_dev      = &soc_codec_dev_wm8750,
 159 };
 160
 161 static struct platform_device *jive_snd_device;
 162
 163 static int __init jive_init(void)
 164 {
 165         int ret;
 166
 167         if (!machine_is_jive())
 168                 return 0;
 169
 170         printk("JIVE WM8750 Audio support\n");
 171
 172         jive_snd_device = platform_device_alloc("soc-audio", -1);
 173         if (!jive_snd_device)
 174                 return -ENOMEM;
 175
 176         platform_set_drvdata(jive_snd_device, &jive_snd_devdata);
 177         jive_snd_devdata.dev = &jive_snd_device->dev;
 178         ret = platform_device_add(jive_snd_device);
 179
 180         if (ret)
 181                 platform_device_put(jive_snd_device);
 182
 183         return ret;
 184 }
 185
 186 static void __exit jive_exit(void)
 187 {
 188         platform_device_unregister(jive_snd_device);
 189 }
 190
 191 module_init(jive_init);
 192 module_exit(jive_exit);
 193
 194 MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>");
 195 MODULE_DESCRIPTION("ALSA SoC Jive Audio support");
 196 MODULE_LICENSE("GPL");