sound/soc/samsung/smdk_wm8580.c

   1 /*
   2  *  smdk_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 <sound/soc.h>
  14 #include <sound/pcm_params.h>
  15
  16 #include <asm/mach-types.h>
  17
  18 #include "../codecs/wm8580.h"
  19 #include "i2s.h"
  20
  21 /*
  22  * Default CFG switch settings to use this driver:
  23  *
  24  *   SMDK6410: Set CFG1 1-3 Off, CFG2 1-4 On
  25  */
  26
  27 /* SMDK has a 12MHZ crystal attached to WM8580 */
  28 #define SMDK_WM8580_FREQ 12000000
  29
  30 static int smdk_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->cpu_dai;
  35         struct snd_soc_dai *codec_dai = rtd->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         /* Set WM8580 to drive MCLK from its PLLA */
  96         ret = snd_soc_dai_set_clkdiv(codec_dai, WM8580_MCLK,
  97                                         WM8580_CLKSRC_PLLA);
  98         if (ret < 0)
  99                 return ret;
 100
 101         ret = snd_soc_dai_set_pll(codec_dai, WM8580_PLLA, 0,
 102                                         SMDK_WM8580_FREQ, pll_out);
 103         if (ret < 0)
 104                 return ret;
 105
 106         ret = snd_soc_dai_set_sysclk(codec_dai, WM8580_CLKSRC_PLLA,
 107                                      pll_out, SND_SOC_CLOCK_IN);
 108         if (ret < 0)
 109                 return ret;
 110
 111         return 0;
 112 }
 113
 114 /*
 115  * SMDK WM8580 DAI operations.
 116  */
 117 static struct snd_soc_ops smdk_ops = {
 118         .hw_params = smdk_hw_params,
 119 };
 120
 121 /* SMDK Playback widgets */
 122 static const struct snd_soc_dapm_widget smdk_wm8580_dapm_widgets[] = {
 123         SND_SOC_DAPM_HP("Front", NULL),
 124         SND_SOC_DAPM_HP("Center+Sub", NULL),
 125         SND_SOC_DAPM_HP("Rear", NULL),
 126
 127         SND_SOC_DAPM_MIC("MicIn", NULL),
 128         SND_SOC_DAPM_LINE("LineIn", NULL),
 129 };
 130
 131 /* SMDK-PAIFTX connections */
 132 static const struct snd_soc_dapm_route smdk_wm8580_audio_map[] = {
 133         /* MicIn feeds AINL */
 134         {"AINL", NULL, "MicIn"},
 135
 136         /* LineIn feeds AINL/R */
 137         {"AINL", NULL, "LineIn"},
 138         {"AINR", NULL, "LineIn"},
 139
 140         /* Front Left/Right are fed VOUT1L/R */
 141         {"Front", NULL, "VOUT1L"},
 142         {"Front", NULL, "VOUT1R"},
 143
 144         /* Center/Sub are fed VOUT2L/R */
 145         {"Center+Sub", NULL, "VOUT2L"},
 146         {"Center+Sub", NULL, "VOUT2R"},
 147
 148         /* Rear Left/Right are fed VOUT3L/R */
 149         {"Rear", NULL, "VOUT3L"},
 150         {"Rear", NULL, "VOUT3R"},
 151 };
 152
 153 static int smdk_wm8580_init_paiftx(struct snd_soc_pcm_runtime *rtd)
 154 {
 155         struct snd_soc_codec *codec = rtd->codec;
 156         struct snd_soc_dapm_context *dapm = &codec->dapm;
 157
 158         /* Enabling the microphone requires the fitting of a 0R
 159          * resistor to connect the line from the microphone jack.
 160          */
 161         snd_soc_dapm_disable_pin(dapm, "MicIn");
 162
 163         return 0;
 164 }
 165
 166 enum {
 167         PRI_PLAYBACK = 0,
 168         PRI_CAPTURE,
 169         SEC_PLAYBACK,
 170 };
 171
 172 static struct snd_soc_dai_link smdk_dai[] = {
 173         [PRI_PLAYBACK] = { /* Primary Playback i/f */
 174                 .name = "WM8580 PAIF RX",
 175                 .stream_name = "Playback",
 176                 .cpu_dai_name = "samsung-i2s.0",
 177                 .codec_dai_name = "wm8580-hifi-playback",
 178                 .platform_name = "samsung-audio",
 179                 .codec_name = "wm8580.0-001b",
 180                 .ops = &smdk_ops,
 181         },
 182         [PRI_CAPTURE] = { /* Primary Capture i/f */
 183                 .name = "WM8580 PAIF TX",
 184                 .stream_name = "Capture",
 185                 .cpu_dai_name = "samsung-i2s.0",
 186                 .codec_dai_name = "wm8580-hifi-capture",
 187                 .platform_name = "samsung-audio",
 188                 .codec_name = "wm8580.0-001b",
 189                 .init = smdk_wm8580_init_paiftx,
 190                 .ops = &smdk_ops,
 191         },
 192         [SEC_PLAYBACK] = { /* Sec_Fifo Playback i/f */
 193                 .name = "Sec_FIFO TX",
 194                 .stream_name = "Playback",
 195                 .cpu_dai_name = "samsung-i2s.x",
 196                 .codec_dai_name = "wm8580-hifi-playback",
 197                 .platform_name = "samsung-audio",
 198                 .codec_name = "wm8580.0-001b",
 199                 .ops = &smdk_ops,
 200         },
 201 };
 202
 203 static struct snd_soc_card smdk = {
 204         .name = "SMDK-I2S",
 205         .dai_link = smdk_dai,
 206         .num_links = 2,
 207
 208         .dapm_widgets = smdk_wm8580_dapm_widgets,
 209         .num_dapm_widgets = ARRAY_SIZE(smdk_wm8580_dapm_widgets),
 210         .dapm_routes = smdk_wm8580_audio_map,
 211         .num_dapm_routes = ARRAY_SIZE(smdk_wm8580_audio_map),
 212 };
 213
 214 static struct platform_device *smdk_snd_device;
 215
 216 static int __init smdk_audio_init(void)
 217 {
 218         int ret;
 219         char *str;
 220
 221         if (machine_is_smdkc100()
 222                         || machine_is_smdkv210() || machine_is_smdkc110()) {
 223                 smdk.num_links = 3;
 224                 /* Secondary is at offset SAMSUNG_I2S_SECOFF from Primary */
 225                 str = (char *)smdk_dai[SEC_PLAYBACK].cpu_dai_name;
 226                 str[strlen(str) - 1] = '0' + SAMSUNG_I2S_SECOFF;
 227         } else if (machine_is_smdk6410()) {
 228                 str = (char *)smdk_dai[PRI_PLAYBACK].cpu_dai_name;
 229                 str[strlen(str) - 1] = '2';
 230                 str = (char *)smdk_dai[PRI_CAPTURE].cpu_dai_name;
 231                 str[strlen(str) - 1] = '2';
 232         }
 233
 234         smdk_snd_device = platform_device_alloc("soc-audio", -1);
 235         if (!smdk_snd_device)
 236                 return -ENOMEM;
 237
 238         platform_set_drvdata(smdk_snd_device, &smdk);
 239         ret = platform_device_add(smdk_snd_device);
 240
 241         if (ret)
 242                 platform_device_put(smdk_snd_device);
 243
 244         return ret;
 245 }
 246 module_init(smdk_audio_init);
 247
 248 static void __exit smdk_audio_exit(void)
 249 {
 250         platform_device_unregister(smdk_snd_device);
 251 }
 252 module_exit(smdk_audio_exit);
 253
 254 MODULE_AUTHOR("Jaswinder Singh, jassi.brar@samsung.com");
 255 MODULE_DESCRIPTION("ALSA SoC SMDK WM8580");
 256 MODULE_LICENSE("GPL");