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 /*
  26  * Default CFG switch settings to use this driver:
  27  *
  28  *   SMDK6410: Set CFG1 1-3 Off, CFG2 1-4 On
  29  */
  30
  31 /* SMDK64XX has a 12MHZ crystal attached to WM8580 */
  32 #define SMDK64XX_WM8580_FREQ 12000000
  33
  34 static int smdk64xx_hw_params(struct snd_pcm_substream *substream,
  35         struct snd_pcm_hw_params *params)
  36 {
  37         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  38         struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
  39         struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
  40         unsigned int pll_out;
  41         int bfs, rfs, ret;
  42
  43         switch (params_format(params)) {
  44         case SNDRV_PCM_FORMAT_U8:
  45         case SNDRV_PCM_FORMAT_S8:
  46                 bfs = 16;
  47                 break;
  48         case SNDRV_PCM_FORMAT_U16_LE:
  49         case SNDRV_PCM_FORMAT_S16_LE:
  50                 bfs = 32;
  51                 break;
  52         default:
  53                 return -EINVAL;
  54         }
  55
  56         /* The Fvco for WM8580 PLLs must fall within [90,100]MHz.
  57          * This criterion can't be met if we request PLL output
  58          * as {8000x256, 64000x256, 11025x256}Hz.
  59          * As a wayout, we rather change rfs to a minimum value that
  60          * results in (params_rate(params) * rfs), and itself, acceptable
  61          * to both - the CODEC and the CPU.
  62          */
  63         switch (params_rate(params)) {
  64         case 16000:
  65         case 22050:
  66         case 32000:
  67         case 44100:
  68         case 48000:
  69         case 88200:
  70         case 96000:
  71                 rfs = 256;
  72                 break;
  73         case 64000:
  74                 rfs = 384;
  75                 break;
  76         case 8000:
  77         case 11025:
  78                 rfs = 512;
  79                 break;
  80         default:
  81                 return -EINVAL;
  82         }
  83         pll_out = params_rate(params) * rfs;
  84
  85         /* Set the Codec DAI configuration */
  86         ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S
  87                                          | SND_SOC_DAIFMT_NB_NF
  88                                          | SND_SOC_DAIFMT_CBM_CFM);
  89         if (ret < 0)
  90                 return ret;
  91
  92         /* Set the AP DAI configuration */
  93         ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S
  94                                          | SND_SOC_DAIFMT_NB_NF
  95                                          | SND_SOC_DAIFMT_CBM_CFM);
  96         if (ret < 0)
  97                 return ret;
  98
  99         ret = snd_soc_dai_set_sysclk(cpu_dai, S3C64XX_CLKSRC_CDCLK,
 100                                         0, SND_SOC_CLOCK_IN);
 101         if (ret < 0)
 102                 return ret;
 103
 104         /* We use PCLK for basic ops in SoC-Slave mode */
 105         ret = snd_soc_dai_set_sysclk(cpu_dai, S3C64XX_CLKSRC_PCLK,
 106                                         0, SND_SOC_CLOCK_IN);
 107         if (ret < 0)
 108                 return ret;
 109
 110         /* Set WM8580 to drive MCLK from its PLLA */
 111         ret = snd_soc_dai_set_clkdiv(codec_dai, WM8580_MCLK,
 112                                         WM8580_CLKSRC_PLLA);
 113         if (ret < 0)
 114                 return ret;
 115
 116         /* Explicitly set WM8580-DAC to source from MCLK */
 117         ret = snd_soc_dai_set_clkdiv(codec_dai, WM8580_DAC_CLKSEL,
 118                                         WM8580_CLKSRC_MCLK);
 119         if (ret < 0)
 120                 return ret;
 121
 122         ret = snd_soc_dai_set_pll(codec_dai, WM8580_PLLA, 0,
 123                                         SMDK64XX_WM8580_FREQ, pll_out);
 124         if (ret < 0)
 125                 return ret;
 126
 127         ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C_I2SV2_DIV_BCLK, bfs);
 128         if (ret < 0)
 129                 return ret;
 130
 131         ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C_I2SV2_DIV_RCLK, rfs);
 132         if (ret < 0)
 133                 return ret;
 134
 135         return 0;
 136 }
 137
 138 /*
 139  * SMDK64XX WM8580 DAI operations.
 140  */
 141 static struct snd_soc_ops smdk64xx_ops = {
 142         .hw_params = smdk64xx_hw_params,
 143 };
 144
 145 /* SMDK64xx Playback widgets */
 146 static const struct snd_soc_dapm_widget wm8580_dapm_widgets_pbk[] = {
 147         SND_SOC_DAPM_HP("Front", NULL),
 148         SND_SOC_DAPM_HP("Center+Sub", NULL),
 149         SND_SOC_DAPM_HP("Rear", NULL),
 150 };
 151
 152 /* SMDK64xx Capture widgets */
 153 static const struct snd_soc_dapm_widget wm8580_dapm_widgets_cpt[] = {
 154         SND_SOC_DAPM_MIC("MicIn", NULL),
 155         SND_SOC_DAPM_LINE("LineIn", NULL),
 156 };
 157
 158 /* SMDK-PAIFTX connections */
 159 static const struct snd_soc_dapm_route audio_map_tx[] = {
 160         /* MicIn feeds AINL */
 161         {"AINL", NULL, "MicIn"},
 162
 163         /* LineIn feeds AINL/R */
 164         {"AINL", NULL, "LineIn"},
 165         {"AINR", NULL, "LineIn"},
 166 };
 167
 168 /* SMDK-PAIFRX connections */
 169 static const struct snd_soc_dapm_route audio_map_rx[] = {
 170         /* Front Left/Right are fed VOUT1L/R */
 171         {"Front", NULL, "VOUT1L"},
 172         {"Front", NULL, "VOUT1R"},
 173
 174         /* Center/Sub are fed VOUT2L/R */
 175         {"Center+Sub", NULL, "VOUT2L"},
 176         {"Center+Sub", NULL, "VOUT2R"},
 177
 178         /* Rear Left/Right are fed VOUT3L/R */
 179         {"Rear", NULL, "VOUT3L"},
 180         {"Rear", NULL, "VOUT3R"},
 181 };
 182
 183 static int smdk64xx_wm8580_init_paiftx(struct snd_soc_codec *codec)
 184 {
 185         /* Add smdk64xx specific Capture widgets */
 186         snd_soc_dapm_new_controls(codec, wm8580_dapm_widgets_cpt,
 187                                   ARRAY_SIZE(wm8580_dapm_widgets_cpt));
 188
 189         /* Set up PAIFTX audio path */
 190         snd_soc_dapm_add_routes(codec, audio_map_tx, ARRAY_SIZE(audio_map_tx));
 191
 192         /* Enabling the microphone requires the fitting of a 0R
 193          * resistor to connect the line from the microphone jack.
 194          */
 195         snd_soc_dapm_disable_pin(codec, "MicIn");
 196
 197         /* signal a DAPM event */
 198         snd_soc_dapm_sync(codec);
 199
 200         return 0;
 201 }
 202
 203 static int smdk64xx_wm8580_init_paifrx(struct snd_soc_codec *codec)
 204 {
 205         /* Add smdk64xx specific Playback widgets */
 206         snd_soc_dapm_new_controls(codec, wm8580_dapm_widgets_pbk,
 207                                   ARRAY_SIZE(wm8580_dapm_widgets_pbk));
 208
 209         /* Set up PAIFRX audio path */
 210         snd_soc_dapm_add_routes(codec, audio_map_rx, ARRAY_SIZE(audio_map_rx));
 211
 212         /* signal a DAPM event */
 213         snd_soc_dapm_sync(codec);
 214
 215         return 0;
 216 }
 217
 218 static struct snd_soc_dai_link smdk64xx_dai[] = {
 219 { /* Primary Playback i/f */
 220         .name = "WM8580 PAIF RX",
 221         .stream_name = "Playback",
 222         .cpu_dai = &s3c64xx_i2s_v4_dai,
 223         .codec_dai = &wm8580_dai[WM8580_DAI_PAIFRX],
 224         .init = smdk64xx_wm8580_init_paifrx,
 225         .ops = &smdk64xx_ops,
 226 },
 227 { /* Primary Capture i/f */
 228         .name = "WM8580 PAIF TX",
 229         .stream_name = "Capture",
 230         .cpu_dai = &s3c64xx_i2s_v4_dai,
 231         .codec_dai = &wm8580_dai[WM8580_DAI_PAIFTX],
 232         .init = smdk64xx_wm8580_init_paiftx,
 233         .ops = &smdk64xx_ops,
 234 },
 235 };
 236
 237 static struct snd_soc_card smdk64xx = {
 238         .name = "smdk64xx",
 239         .platform = &s3c24xx_soc_platform,
 240         .dai_link = smdk64xx_dai,
 241         .num_links = ARRAY_SIZE(smdk64xx_dai),
 242 };
 243
 244 static struct snd_soc_device smdk64xx_snd_devdata = {
 245         .card = &smdk64xx,
 246         .codec_dev = &soc_codec_dev_wm8580,
 247 };
 248
 249 static struct platform_device *smdk64xx_snd_device;
 250
 251 static int __init smdk64xx_audio_init(void)
 252 {
 253         int ret;
 254
 255         smdk64xx_snd_device = platform_device_alloc("soc-audio", -1);
 256         if (!smdk64xx_snd_device)
 257                 return -ENOMEM;
 258
 259         platform_set_drvdata(smdk64xx_snd_device, &smdk64xx_snd_devdata);
 260         smdk64xx_snd_devdata.dev = &smdk64xx_snd_device->dev;
 261         ret = platform_device_add(smdk64xx_snd_device);
 262
 263         if (ret)
 264                 platform_device_put(smdk64xx_snd_device);
 265
 266         return ret;
 267 }
 268 module_init(smdk64xx_audio_init);
 269
 270 MODULE_AUTHOR("Jaswinder Singh, jassi.brar@samsung.com");
 271 MODULE_DESCRIPTION("ALSA SoC SMDK64XX WM8580");
 272 MODULE_LICENSE("GPL");