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 #define S3C64XX_I2S_V4 2
  26
  27 /* SMDK64XX has a 12MHZ crystal attached to WM8580 */
  28 #define SMDK64XX_WM8580_FREQ 12000000
  29
  30 static int smdk64xx_hw_params(struct snd_pcm_substream *substream,
  31         struct snd_pcm_hw_params *params)
  32 {
  33         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  34         struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
  35         struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
  36         unsigned int pll_out;
  37         int bfs, rfs, ret;
  38
  39         switch (params_format(params)) {
  40         case SNDRV_PCM_FORMAT_U8:
  41         case SNDRV_PCM_FORMAT_S8:
  42                 bfs = 16;
  43                 break;
  44         case SNDRV_PCM_FORMAT_U16_LE:
  45         case SNDRV_PCM_FORMAT_S16_LE:
  46                 bfs = 32;
  47                 break;
  48         default:
  49                 return -EINVAL;
  50         }
  51
  52         /* The Fvco for WM8580 PLLs must fall within [90,100]MHz.
  53          * This criterion can't be met if we request PLL output
  54          * as {8000x256, 64000x256, 11025x256}Hz.
  55          * As a wayout, we rather change rfs to a minimum value that
  56          * results in (params_rate(params) * rfs), and itself, acceptable
  57          * to both - the CODEC and the CPU.
  58          */
  59         switch (params_rate(params)) {
  60         case 16000:
  61         case 22050:
  62         case 32000:
  63         case 44100:
  64         case 48000:
  65         case 88200:
  66         case 96000:
  67                 rfs = 256;
  68                 break;
  69         case 64000:
  70                 rfs = 384;
  71                 break;
  72         case 8000:
  73         case 11025:
  74                 rfs = 512;
  75                 break;
  76         default:
  77                 return -EINVAL;
  78         }
  79         pll_out = params_rate(params) * rfs;
  80
  81         /* Set the Codec DAI configuration */
  82         ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S
  83                                          | SND_SOC_DAIFMT_NB_NF
  84                                          | SND_SOC_DAIFMT_CBM_CFM);
  85         if (ret < 0)
  86                 return ret;
  87
  88         /* Set the AP DAI configuration */
  89         ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S
  90                                          | SND_SOC_DAIFMT_NB_NF
  91                                          | SND_SOC_DAIFMT_CBM_CFM);
  92         if (ret < 0)
  93                 return ret;
  94
  95         ret = snd_soc_dai_set_sysclk(cpu_dai, S3C64XX_CLKSRC_CDCLK,
  96                                         0, SND_SOC_CLOCK_IN);
  97         if (ret < 0)
  98                 return ret;
  99
 100         /* We use PCLK for basic ops in SoC-Slave mode */
 101         ret = snd_soc_dai_set_sysclk(cpu_dai, S3C64XX_CLKSRC_PCLK,
 102                                         0, SND_SOC_CLOCK_IN);
 103         if (ret < 0)
 104                 return ret;
 105
 106         /* Set WM8580 to drive MCLK from its PLLA */
 107         ret = snd_soc_dai_set_clkdiv(codec_dai, WM8580_MCLK,
 108                                         WM8580_CLKSRC_PLLA);
 109         if (ret < 0)
 110                 return ret;
 111
 112         /* Explicitly set WM8580-DAC to source from MCLK */
 113         ret = snd_soc_dai_set_clkdiv(codec_dai, WM8580_DAC_CLKSEL,
 114                                         WM8580_CLKSRC_MCLK);
 115         if (ret < 0)
 116                 return ret;
 117
 118         ret = snd_soc_dai_set_pll(codec_dai, WM8580_PLLA, 0,
 119                                         SMDK64XX_WM8580_FREQ, pll_out);
 120         if (ret < 0)
 121                 return ret;
 122
 123         ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C_I2SV2_DIV_BCLK, bfs);
 124         if (ret < 0)
 125                 return ret;
 126
 127         ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C_I2SV2_DIV_RCLK, rfs);
 128         if (ret < 0)
 129                 return ret;
 130
 131         return 0;
 132 }
 133
 134 /*
 135  * SMDK64XX WM8580 DAI operations.
 136  */
 137 static struct snd_soc_ops smdk64xx_ops = {
 138         .hw_params = smdk64xx_hw_params,
 139 };
 140
 141 /* SMDK64xx Playback widgets */
 142 static const struct snd_soc_dapm_widget wm8580_dapm_widgets_pbk[] = {
 143         SND_SOC_DAPM_HP("Front-L/R", NULL),
 144         SND_SOC_DAPM_HP("Center/Sub", NULL),
 145         SND_SOC_DAPM_HP("Rear-L/R", NULL),
 146 };
 147
 148 /* SMDK64xx Capture widgets */
 149 static const struct snd_soc_dapm_widget wm8580_dapm_widgets_cpt[] = {
 150         SND_SOC_DAPM_MIC("MicIn", NULL),
 151         SND_SOC_DAPM_LINE("LineIn", NULL),
 152 };
 153
 154 /* SMDK-PAIFTX connections */
 155 static const struct snd_soc_dapm_route audio_map_tx[] = {
 156         /* MicIn feeds AINL */
 157         {"AINL", NULL, "MicIn"},
 158
 159         /* LineIn feeds AINL/R */
 160         {"AINL", NULL, "LineIn"},
 161         {"AINR", NULL, "LineIn"},
 162 };
 163
 164 /* SMDK-PAIFRX connections */
 165 static const struct snd_soc_dapm_route audio_map_rx[] = {
 166         /* Front Left/Right are fed VOUT1L/R */
 167         {"Front-L/R", NULL, "VOUT1L"},
 168         {"Front-L/R", NULL, "VOUT1R"},
 169
 170         /* Center/Sub are fed VOUT2L/R */
 171         {"Center/Sub", NULL, "VOUT2L"},
 172         {"Center/Sub", NULL, "VOUT2R"},
 173
 174         /* Rear Left/Right are fed VOUT3L/R */
 175         {"Rear-L/R", NULL, "VOUT3L"},
 176         {"Rear-L/R", NULL, "VOUT3R"},
 177 };
 178
 179 static int smdk64xx_wm8580_init_paiftx(struct snd_soc_codec *codec)
 180 {
 181         /* Add smdk64xx specific Capture widgets */
 182         snd_soc_dapm_new_controls(codec, wm8580_dapm_widgets_cpt,
 183                                   ARRAY_SIZE(wm8580_dapm_widgets_cpt));
 184
 185         /* Set up PAIFTX audio path */
 186         snd_soc_dapm_add_routes(codec, audio_map_tx, ARRAY_SIZE(audio_map_tx));
 187
 188         /* Enabling the microphone requires the fitting of a 0R
 189          * resistor to connect the line from the microphone jack.
 190          */
 191         snd_soc_dapm_disable_pin(codec, "MicIn");
 192
 193         /* signal a DAPM event */
 194         snd_soc_dapm_sync(codec);
 195
 196         return 0;
 197 }
 198
 199 static int smdk64xx_wm8580_init_paifrx(struct snd_soc_codec *codec)
 200 {
 201         /* Add smdk64xx specific Playback widgets */
 202         snd_soc_dapm_new_controls(codec, wm8580_dapm_widgets_pbk,
 203                                   ARRAY_SIZE(wm8580_dapm_widgets_pbk));
 204
 205         /* Set up PAIFRX audio path */
 206         snd_soc_dapm_add_routes(codec, audio_map_rx, ARRAY_SIZE(audio_map_rx));
 207
 208         /* signal a DAPM event */
 209         snd_soc_dapm_sync(codec);
 210
 211         return 0;
 212 }
 213
 214 static struct snd_soc_dai_link smdk64xx_dai[] = {
 215 { /* Primary Playback i/f */
 216         .name = "WM8580 PAIF RX",
 217         .stream_name = "Playback",
 218         .cpu_dai = &s3c64xx_i2s_dai[S3C64XX_I2S_V4],
 219         .codec_dai = &wm8580_dai[WM8580_DAI_PAIFRX],
 220         .init = smdk64xx_wm8580_init_paifrx,
 221         .ops = &smdk64xx_ops,
 222 },
 223 { /* Primary Capture i/f */
 224         .name = "WM8580 PAIF TX",
 225         .stream_name = "Capture",
 226         .cpu_dai = &s3c64xx_i2s_dai[S3C64XX_I2S_V4],
 227         .codec_dai = &wm8580_dai[WM8580_DAI_PAIFTX],
 228         .init = smdk64xx_wm8580_init_paiftx,
 229         .ops = &smdk64xx_ops,
 230 },
 231 };
 232
 233 static struct snd_soc_card smdk64xx = {
 234         .name = "smdk64xx",
 235         .platform = &s3c24xx_soc_platform,
 236         .dai_link = smdk64xx_dai,
 237         .num_links = ARRAY_SIZE(smdk64xx_dai),
 238 };
 239
 240 static struct snd_soc_device smdk64xx_snd_devdata = {
 241         .card = &smdk64xx,
 242         .codec_dev = &soc_codec_dev_wm8580,
 243 };
 244
 245 static struct platform_device *smdk64xx_snd_device;
 246
 247 static int __init smdk64xx_audio_init(void)
 248 {
 249         int ret;
 250
 251         smdk64xx_snd_device = platform_device_alloc("soc-audio", -1);
 252         if (!smdk64xx_snd_device)
 253                 return -ENOMEM;
 254
 255         platform_set_drvdata(smdk64xx_snd_device, &smdk64xx_snd_devdata);
 256         smdk64xx_snd_devdata.dev = &smdk64xx_snd_device->dev;
 257         ret = platform_device_add(smdk64xx_snd_device);
 258
 259         if (ret)
 260                 platform_device_put(smdk64xx_snd_device);
 261
 262         return ret;
 263 }
 264 module_init(smdk64xx_audio_init);
 265
 266 MODULE_AUTHOR("Jaswinder Singh, jassi.brar@samsung.com");
 267 MODULE_DESCRIPTION("ALSA SoC SMDK64XX WM8580");
 268 MODULE_LICENSE("GPL");