release/src-rt-6.x.4708/linux/linux-2.6.36/sound/soc/s3c24xx/smdk64xx_wm8580.c

   1 /*
   2  *  smdk64xx_wm8580.c
   3  *
   4  *  Copyright (c) 2009 Samsung Electronics Co. Ltd
   5  *  Author: Jaswinder Singh <jassi.brar@samsung.com>
   6  *
   7  *  This program is free software; you can redistribute  it and/or modify it
   8  *  under  the terms of  the GNU General  Public License as published by the
   9  *  Free Software Foundation;  either version 2 of the  License, or (at your
  10  *  option) any later version.
  11  */
  12
  13 #include <linux/platform_device.h>
  14 #include <linux/clk.h>
  15 #include <sound/core.h>
  16 #include <sound/pcm.h>
  17 #include <sound/pcm_params.h>
  18 #include <sound/soc.h>
  19 #include <sound/soc-dapm.h>
  20
  21 #include "../codecs/wm8580.h"
  22 #include "s3c-dma.h"
  23 #include "s3c64xx-i2s.h"
  24
  25 /* SMDK64XX has a 12MHZ crystal attached to WM8580 */
  26 #define SMDK64XX_WM8580_FREQ 12000000
  27
  28 static int smdk64xx_hw_params(struct snd_pcm_substream *substream,
  29         struct snd_pcm_hw_params *params)
  30 {
  31         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  32         struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
  33         struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
  34         unsigned int pll_out;
  35         int bfs, rfs, ret;
  36
  37         switch (params_format(params)) {
  38         case SNDRV_PCM_FORMAT_U8:
  39         case SNDRV_PCM_FORMAT_S8:
  40                 bfs = 16;
  41                 break;
  42         case SNDRV_PCM_FORMAT_U16_LE:
  43         case SNDRV_PCM_FORMAT_S16_LE:
  44                 bfs = 32;
  45                 break;
  46         default:
  47                 return -EINVAL;
  48         }
  49
  50         /* The Fvco for WM8580 PLLs must fall within [90,100]MHz.
  51          * This criterion can't be met if we request PLL output
  52          * as {8000x256, 64000x256, 11025x256}Hz.
  53          * As a wayout, we rather change rfs to a minimum value that
  54          * results in (params_rate(params) * rfs), and itself, acceptable
  55          * to both - the CODEC and the CPU.
  56          */
  57         switch (params_rate(params)) {
  58         case 16000:
  59         case 22050:
  60         case 32000:
  61         case 44100:
  62         case 48000:
  63         case 88200:
  64         case 96000:
  65                 rfs = 256;
  66                 break;
  67         case 64000:
  68                 rfs = 384;
  69                 break;
  70         case 8000:
  71         case 11025:
  72                 rfs = 512;
  73                 break;
  74         default:
  75                 return -EINVAL;
  76         }
  77         pll_out = params_rate(params) * rfs;
  78
  79         /* Set the Codec DAI configuration */
  80         ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S
  81                                          | SND_SOC_DAIFMT_NB_NF
  82                                          | SND_SOC_DAIFMT_CBM_CFM);
  83         if (ret < 0)
  84                 return ret;
  85
  86         /* Set the AP DAI configuration */
  87         ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S
  88                                          | SND_SOC_DAIFMT_NB_NF
  89                                          | SND_SOC_DAIFMT_CBM_CFM);
  90         if (ret < 0)
  91                 return ret;
  92
  93         ret = snd_soc_dai_set_sysclk(cpu_dai, S3C64XX_CLKSRC_CDCLK,
  94                                         0, SND_SOC_CLOCK_IN);
  95         if (ret < 0)
  96                 return ret;
  97
  98         /* We use PCLK for basic ops in SoC-Slave mode */
  99         ret = snd_soc_dai_set_sysclk(cpu_dai, S3C64XX_CLKSRC_PCLK,
 100                                         0, SND_SOC_CLOCK_IN);
 101         if (ret < 0)
 102                 return ret;
 103
 104         /* Set WM8580 to drive MCLK from its PLLA */
 105         ret = snd_soc_dai_set_clkdiv(codec_dai, WM8580_MCLK,
 106                                         WM8580_CLKSRC_PLLA);
 107         if (ret < 0)
 108                 return ret;
 109
 110         /* Explicitly set WM8580-DAC to source from MCLK */
 111         ret = snd_soc_dai_set_clkdiv(codec_dai, WM8580_DAC_CLKSEL,
 112                                         WM8580_CLKSRC_MCLK);
 113         if (ret < 0)
 114                 return ret;
 115
 116         ret = snd_soc_dai_set_pll(codec_dai, WM8580_PLLA, 0,
 117                                         SMDK64XX_WM8580_FREQ, pll_out);
 118         if (ret < 0)
 119                 return ret;
 120
 121         ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C_I2SV2_DIV_BCLK, bfs);
 122         if (ret < 0)
 123                 return ret;
 124
 125         ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C_I2SV2_DIV_RCLK, rfs);
 126         if (ret < 0)
 127                 return ret;
 128
 129         return 0;
 130 }
 131
 132 /*
 133  * SMDK64XX WM8580 DAI operations.
 134  */
 135 static struct snd_soc_ops smdk64xx_ops = {
 136         .hw_params = smdk64xx_hw_params,
 137 };
 138
 139 /* SMDK64xx Playback widgets */
 140 static const struct snd_soc_dapm_widget wm8580_dapm_widgets_pbk[] = {
 141         SND_SOC_DAPM_HP("Front-L/R", NULL),
 142         SND_SOC_DAPM_HP("Center/Sub", NULL),
 143         SND_SOC_DAPM_HP("Rear-L/R", NULL),
 144 };
 145
 146 /* SMDK64xx Capture widgets */
 147 static const struct snd_soc_dapm_widget wm8580_dapm_widgets_cpt[] = {
 148         SND_SOC_DAPM_MIC("MicIn", NULL),
 149         SND_SOC_DAPM_LINE("LineIn", NULL),
 150 };
 151
 152 /* SMDK-PAIFTX connections */
 153 static const struct snd_soc_dapm_route audio_map_tx[] = {
 154         /* MicIn feeds AINL */
 155         {"AINL", NULL, "MicIn"},
 156
 157         /* LineIn feeds AINL/R */
 158         {"AINL", NULL, "LineIn"},
 159         {"AINR", NULL, "LineIn"},
 160 };
 161
 162 /* SMDK-PAIFRX connections */
 163 static const struct snd_soc_dapm_route audio_map_rx[] = {
 164         /* Front Left/Right are fed VOUT1L/R */
 165         {"Front-L/R", NULL, "VOUT1L"},
 166         {"Front-L/R", NULL, "VOUT1R"},
 167
 168         /* Center/Sub are fed VOUT2L/R */
 169         {"Center/Sub", NULL, "VOUT2L"},
 170         {"Center/Sub", NULL, "VOUT2R"},
 171
 172         /* Rear Left/Right are fed VOUT3L/R */
 173         {"Rear-L/R", NULL, "VOUT3L"},
 174         {"Rear-L/R", NULL, "VOUT3R"},
 175 };
 176
 177 static int smdk64xx_wm8580_init_paiftx(struct snd_soc_codec *codec)
 178 {
 179         /* Add smdk64xx specific Capture widgets */
 180         snd_soc_dapm_new_controls(codec, wm8580_dapm_widgets_cpt,
 181                                   ARRAY_SIZE(wm8580_dapm_widgets_cpt));
 182
 183         /* Set up PAIFTX audio path */
 184         snd_soc_dapm_add_routes(codec, audio_map_tx, ARRAY_SIZE(audio_map_tx));
 185
 186         /* Enabling the microphone requires the fitting of a 0R
 187          * resistor to connect the line from the microphone jack.
 188          */
 189         snd_soc_dapm_disable_pin(codec, "MicIn");
 190
 191         /* signal a DAPM event */
 192         snd_soc_dapm_sync(codec);
 193
 194         return 0;
 195 }
 196
 197 static int smdk64xx_wm8580_init_paifrx(struct snd_soc_codec *codec)
 198 {
 199         /* Add smdk64xx specific Playback widgets */
 200         snd_soc_dapm_new_controls(codec, wm8580_dapm_widgets_pbk,
 201                                   ARRAY_SIZE(wm8580_dapm_widgets_pbk));
 202
 203         /* Set up PAIFRX audio path */
 204         snd_soc_dapm_add_routes(codec, audio_map_rx, ARRAY_SIZE(audio_map_rx));
 205
 206         /* signal a DAPM event */
 207         snd_soc_dapm_sync(codec);
 208
 209         return 0;
 210 }
 211
 212 static struct snd_soc_dai_link smdk64xx_dai[] = {
 213 { /* Primary Playback i/f */
 214         .name = "WM8580 PAIF RX",
 215         .stream_name = "Playback",
 216         .cpu_dai = &s3c64xx_i2s_v4_dai,
 217         .codec_dai = &wm8580_dai[WM8580_DAI_PAIFRX],
 218         .init = smdk64xx_wm8580_init_paifrx,
 219         .ops = &smdk64xx_ops,
 220 },
 221 { /* Primary Capture i/f */
 222         .name = "WM8580 PAIF TX",
 223         .stream_name = "Capture",
 224         .cpu_dai = &s3c64xx_i2s_v4_dai,
 225         .codec_dai = &wm8580_dai[WM8580_DAI_PAIFTX],
 226         .init = smdk64xx_wm8580_init_paiftx,
 227         .ops = &smdk64xx_ops,
 228 },
 229 };
 230
 231 static struct snd_soc_card smdk64xx = {
 232         .name = "smdk64xx",
 233         .platform = &s3c24xx_soc_platform,
 234         .dai_link = smdk64xx_dai,
 235         .num_links = ARRAY_SIZE(smdk64xx_dai),
 236 };
 237
 238 static struct snd_soc_device smdk64xx_snd_devdata = {
 239         .card = &smdk64xx,
 240         .codec_dev = &soc_codec_dev_wm8580,
 241 };
 242
 243 static struct platform_device *smdk64xx_snd_device;
 244
 245 static int __init smdk64xx_audio_init(void)
 246 {
 247         int ret;
 248
 249         smdk64xx_snd_device = platform_device_alloc("soc-audio", -1);
 250         if (!smdk64xx_snd_device)
 251                 return -ENOMEM;
 252
 253         platform_set_drvdata(smdk64xx_snd_device, &smdk64xx_snd_devdata);
 254         smdk64xx_snd_devdata.dev = &smdk64xx_snd_device->dev;
 255         ret = platform_device_add(smdk64xx_snd_device);
 256
 257         if (ret)
 258                 platform_device_put(smdk64xx_snd_device);
 259
 260         return ret;
 261 }
 262 module_init(smdk64xx_audio_init);
 263
 264 MODULE_AUTHOR("Jaswinder Singh, jassi.brar@samsung.com");
 265 MODULE_DESCRIPTION("ALSA SoC SMDK64XX WM8580");
 266 MODULE_LICENSE("GPL");