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->cpu_dai;
  39         struct snd_soc_dai *codec_dai = rtd->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         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_sysclk(codec_dai, WM8580_CLKSRC_PLLA,
 122                                      pll_out, SND_SOC_CLOCK_IN);
 123         if (ret < 0)
 124                 return ret;
 125
 126         ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C_I2SV2_DIV_BCLK, bfs);
 127         if (ret < 0)
 128                 return ret;
 129
 130         ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C_I2SV2_DIV_RCLK, rfs);
 131         if (ret < 0)
 132                 return ret;
 133
 134         return 0;
 135 }
 136
 137 /*
 138  * SMDK64XX WM8580 DAI operations.
 139  */
 140 static struct snd_soc_ops smdk64xx_ops = {
 141         .hw_params = smdk64xx_hw_params,
 142 };
 143
 144 /* SMDK64xx Playback widgets */
 145 static const struct snd_soc_dapm_widget wm8580_dapm_widgets_pbk[] = {
 146         SND_SOC_DAPM_HP("Front", NULL),
 147         SND_SOC_DAPM_HP("Center+Sub", NULL),
 148         SND_SOC_DAPM_HP("Rear", NULL),
 149 };
 150
 151 /* SMDK64xx Capture widgets */
 152 static const struct snd_soc_dapm_widget wm8580_dapm_widgets_cpt[] = {
 153         SND_SOC_DAPM_MIC("MicIn", NULL),
 154         SND_SOC_DAPM_LINE("LineIn", NULL),
 155 };
 156
 157 /* SMDK-PAIFTX connections */
 158 static const struct snd_soc_dapm_route audio_map_tx[] = {
 159         /* MicIn feeds AINL */
 160         {"AINL", NULL, "MicIn"},
 161
 162         /* LineIn feeds AINL/R */
 163         {"AINL", NULL, "LineIn"},
 164         {"AINR", NULL, "LineIn"},
 165 };
 166
 167 /* SMDK-PAIFRX connections */
 168 static const struct snd_soc_dapm_route audio_map_rx[] = {
 169         /* Front Left/Right are fed VOUT1L/R */
 170         {"Front", NULL, "VOUT1L"},
 171         {"Front", NULL, "VOUT1R"},
 172
 173         /* Center/Sub are fed VOUT2L/R */
 174         {"Center+Sub", NULL, "VOUT2L"},
 175         {"Center+Sub", NULL, "VOUT2R"},
 176
 177         /* Rear Left/Right are fed VOUT3L/R */
 178         {"Rear", NULL, "VOUT3L"},
 179         {"Rear", NULL, "VOUT3R"},
 180 };
 181
 182 static int smdk64xx_wm8580_init_paiftx(struct snd_soc_pcm_runtime *rtd)
 183 {
 184         struct snd_soc_codec *codec = rtd->codec;
 185         struct snd_soc_dapm_context *dapm = &codec->dapm;
 186
 187         /* Add smdk64xx specific Capture widgets */
 188         snd_soc_dapm_new_controls(dapm, wm8580_dapm_widgets_cpt,
 189                                   ARRAY_SIZE(wm8580_dapm_widgets_cpt));
 190
 191         /* Set up PAIFTX audio path */
 192         snd_soc_dapm_add_routes(dapm, audio_map_tx, ARRAY_SIZE(audio_map_tx));
 193
 194         /* Enabling the microphone requires the fitting of a 0R
 195          * resistor to connect the line from the microphone jack.
 196          */
 197         snd_soc_dapm_disable_pin(dapm, "MicIn");
 198
 199         /* signal a DAPM event */
 200         snd_soc_dapm_sync(dapm);
 201
 202         return 0;
 203 }
 204
 205 static int smdk64xx_wm8580_init_paifrx(struct snd_soc_pcm_runtime *rtd)
 206 {
 207         struct snd_soc_codec *codec = rtd->codec;
 208         struct snd_soc_dapm_context *dapm = &codec->dapm;
 209
 210         /* Add smdk64xx specific Playback widgets */
 211         snd_soc_dapm_new_controls(dapm, wm8580_dapm_widgets_pbk,
 212                                   ARRAY_SIZE(wm8580_dapm_widgets_pbk));
 213
 214         /* Set up PAIFRX audio path */
 215         snd_soc_dapm_add_routes(dapm, audio_map_rx, ARRAY_SIZE(audio_map_rx));
 216
 217         /* signal a DAPM event */
 218         snd_soc_dapm_sync(dapm);
 219
 220         return 0;
 221 }
 222
 223 static struct snd_soc_dai_link smdk64xx_dai[] = {
 224 { /* Primary Playback i/f */
 225         .name = "WM8580 PAIF RX",
 226         .stream_name = "Playback",
 227         .cpu_dai_name = "s3c64xx-iis-v4",
 228         .codec_dai_name = "wm8580-hifi-playback",
 229         .platform_name = "s3c24xx-pcm-audio",
 230         .codec_name = "wm8580-codec.0-001b",
 231         .init = smdk64xx_wm8580_init_paifrx,
 232         .ops = &smdk64xx_ops,
 233 },
 234 { /* Primary Capture i/f */
 235         .name = "WM8580 PAIF TX",
 236         .stream_name = "Capture",
 237         .cpu_dai_name = "s3c64xx-iis-v4",
 238         .codec_dai_name = "wm8580-hifi-capture",
 239         .platform_name = "s3c24xx-pcm-audio",
 240         .codec_name = "wm8580-codec.0-001b",
 241         .init = smdk64xx_wm8580_init_paiftx,
 242         .ops = &smdk64xx_ops,
 243 },
 244 };
 245
 246 static struct snd_soc_card smdk64xx = {
 247         .name = "SMDK64xx 5.1",
 248         .dai_link = smdk64xx_dai,
 249         .num_links = ARRAY_SIZE(smdk64xx_dai),
 250 };
 251
 252 static struct platform_device *smdk64xx_snd_device;
 253
 254 static int __init smdk64xx_audio_init(void)
 255 {
 256         int ret;
 257
 258         smdk64xx_snd_device = platform_device_alloc("soc-audio", -1);
 259         if (!smdk64xx_snd_device)
 260                 return -ENOMEM;
 261
 262         platform_set_drvdata(smdk64xx_snd_device, &smdk64xx);
 263         ret = platform_device_add(smdk64xx_snd_device);
 264
 265         if (ret)
 266                 platform_device_put(smdk64xx_snd_device);
 267
 268         return ret;
 269 }
 270 module_init(smdk64xx_audio_init);
 271
 272 MODULE_AUTHOR("Jaswinder Singh, jassi.brar@samsung.com");
 273 MODULE_DESCRIPTION("ALSA SoC SMDK64XX WM8580");
 274 MODULE_LICENSE("GPL");