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 <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
  20 #include <asm/mach-types.h>
  21
  22 #include "../codecs/wm8580.h"
  23 #include "dma.h"
  24 #include "i2s.h"
  25
  26 /*
  27  * Default CFG switch settings to use this driver:
  28  *
  29  *   SMDK6410: Set CFG1 1-3 Off, CFG2 1-4 On
  30  */
  31
  32 /* SMDK has a 12MHZ crystal attached to WM8580 */
  33 #define SMDK_WM8580_FREQ 12000000
  34
  35 static int smdk_hw_params(struct snd_pcm_substream *substream,
  36         struct snd_pcm_hw_params *params)
  37 {
  38         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  39         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  40         struct snd_soc_dai *codec_dai = rtd->codec_dai;
  41         unsigned int pll_out;
  42         int bfs, rfs, ret;
  43
  44         switch (params_format(params)) {
  45         case SNDRV_PCM_FORMAT_U8:
  46         case SNDRV_PCM_FORMAT_S8:
  47                 bfs = 16;
  48                 break;
  49         case SNDRV_PCM_FORMAT_U16_LE:
  50         case SNDRV_PCM_FORMAT_S16_LE:
  51                 bfs = 32;
  52                 break;
  53         default:
  54                 return -EINVAL;
  55         }
  56
  57         /* The Fvco for WM8580 PLLs must fall within [90,100]MHz.
  58          * This criterion can't be met if we request PLL output
  59          * as {8000x256, 64000x256, 11025x256}Hz.
  60          * As a wayout, we rather change rfs to a minimum value that
  61          * results in (params_rate(params) * rfs), and itself, acceptable
  62          * to both - the CODEC and the CPU.
  63          */
  64         switch (params_rate(params)) {
  65         case 16000:
  66         case 22050:
  67         case 32000:
  68         case 44100:
  69         case 48000:
  70         case 88200:
  71         case 96000:
  72                 rfs = 256;
  73                 break;
  74         case 64000:
  75                 rfs = 384;
  76                 break;
  77         case 8000:
  78         case 11025:
  79                 rfs = 512;
  80                 break;
  81         default:
  82                 return -EINVAL;
  83         }
  84         pll_out = params_rate(params) * rfs;
  85
  86         /* Set the Codec DAI configuration */
  87         ret = snd_soc_dai_set_fmt(codec_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         /* Set the AP DAI configuration */
  94         ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S
  95                                          | SND_SOC_DAIFMT_NB_NF
  96                                          | SND_SOC_DAIFMT_CBM_CFM);
  97         if (ret < 0)
  98                 return ret;
  99
 100         /* Set WM8580 to drive MCLK from its PLLA */
 101         ret = snd_soc_dai_set_clkdiv(codec_dai, WM8580_MCLK,
 102                                         WM8580_CLKSRC_PLLA);
 103         if (ret < 0)
 104                 return ret;
 105
 106         ret = snd_soc_dai_set_pll(codec_dai, WM8580_PLLA, 0,
 107                                         SMDK_WM8580_FREQ, pll_out);
 108         if (ret < 0)
 109                 return ret;
 110
 111         ret = snd_soc_dai_set_sysclk(codec_dai, WM8580_CLKSRC_PLLA,
 112                                      pll_out, SND_SOC_CLOCK_IN);
 113         if (ret < 0)
 114                 return ret;
 115
 116         return 0;
 117 }
 118
 119 /*
 120  * SMDK WM8580 DAI operations.
 121  */
 122 static struct snd_soc_ops smdk_ops = {
 123         .hw_params = smdk_hw_params,
 124 };
 125
 126 /* SMDK Playback widgets */
 127 static const struct snd_soc_dapm_widget wm8580_dapm_widgets_pbk[] = {
 128         SND_SOC_DAPM_HP("Front", NULL),
 129         SND_SOC_DAPM_HP("Center+Sub", NULL),
 130         SND_SOC_DAPM_HP("Rear", NULL),
 131 };
 132
 133 /* SMDK Capture widgets */
 134 static const struct snd_soc_dapm_widget wm8580_dapm_widgets_cpt[] = {
 135         SND_SOC_DAPM_MIC("MicIn", NULL),
 136         SND_SOC_DAPM_LINE("LineIn", NULL),
 137 };
 138
 139 /* SMDK-PAIFTX connections */
 140 static const struct snd_soc_dapm_route audio_map_tx[] = {
 141         /* MicIn feeds AINL */
 142         {"AINL", NULL, "MicIn"},
 143
 144         /* LineIn feeds AINL/R */
 145         {"AINL", NULL, "LineIn"},
 146         {"AINR", NULL, "LineIn"},
 147 };
 148
 149 /* SMDK-PAIFRX connections */
 150 static const struct snd_soc_dapm_route audio_map_rx[] = {
 151         /* Front Left/Right are fed VOUT1L/R */
 152         {"Front", NULL, "VOUT1L"},
 153         {"Front", NULL, "VOUT1R"},
 154
 155         /* Center/Sub are fed VOUT2L/R */
 156         {"Center+Sub", NULL, "VOUT2L"},
 157         {"Center+Sub", NULL, "VOUT2R"},
 158
 159         /* Rear Left/Right are fed VOUT3L/R */
 160         {"Rear", NULL, "VOUT3L"},
 161         {"Rear", NULL, "VOUT3R"},
 162 };
 163
 164 static int smdk_wm8580_init_paiftx(struct snd_soc_pcm_runtime *rtd)
 165 {
 166         struct snd_soc_codec *codec = rtd->codec;
 167         struct snd_soc_dapm_context *dapm = &codec->dapm;
 168
 169         /* Add smdk specific Capture widgets */
 170         snd_soc_dapm_new_controls(dapm, wm8580_dapm_widgets_cpt,
 171                                   ARRAY_SIZE(wm8580_dapm_widgets_cpt));
 172
 173         /* Set up PAIFTX audio path */
 174         snd_soc_dapm_add_routes(dapm, audio_map_tx, ARRAY_SIZE(audio_map_tx));
 175
 176         /* Enabling the microphone requires the fitting of a 0R
 177          * resistor to connect the line from the microphone jack.
 178          */
 179         snd_soc_dapm_disable_pin(dapm, "MicIn");
 180
 181         /* signal a DAPM event */
 182         snd_soc_dapm_sync(dapm);
 183
 184         return 0;
 185 }
 186
 187 static int smdk_wm8580_init_paifrx(struct snd_soc_pcm_runtime *rtd)
 188 {
 189         struct snd_soc_codec *codec = rtd->codec;
 190         struct snd_soc_dapm_context *dapm = &codec->dapm;
 191
 192         /* Add smdk specific Playback widgets */
 193         snd_soc_dapm_new_controls(dapm, wm8580_dapm_widgets_pbk,
 194                                   ARRAY_SIZE(wm8580_dapm_widgets_pbk));
 195
 196         /* Set up PAIFRX audio path */
 197         snd_soc_dapm_add_routes(dapm, audio_map_rx, ARRAY_SIZE(audio_map_rx));
 198
 199         /* signal a DAPM event */
 200         snd_soc_dapm_sync(dapm);
 201
 202         return 0;
 203 }
 204
 205 enum {
 206         PRI_PLAYBACK = 0,
 207         PRI_CAPTURE,
 208         SEC_PLAYBACK,
 209 };
 210
 211 static struct snd_soc_dai_link smdk_dai[] = {
 212         [PRI_PLAYBACK] = { /* Primary Playback i/f */
 213                 .name = "WM8580 PAIF RX",
 214                 .stream_name = "Playback",
 215                 .cpu_dai_name = "samsung-i2s.0",
 216                 .codec_dai_name = "wm8580-hifi-playback",
 217                 .platform_name = "samsung-audio",
 218                 .codec_name = "wm8580-codec.0-001b",
 219                 .init = smdk_wm8580_init_paifrx,
 220                 .ops = &smdk_ops,
 221         },
 222         [PRI_CAPTURE] = { /* Primary Capture i/f */
 223                 .name = "WM8580 PAIF TX",
 224                 .stream_name = "Capture",
 225                 .cpu_dai_name = "samsung-i2s.0",
 226                 .codec_dai_name = "wm8580-hifi-capture",
 227                 .platform_name = "samsung-audio",
 228                 .codec_name = "wm8580-codec.0-001b",
 229                 .init = smdk_wm8580_init_paiftx,
 230                 .ops = &smdk_ops,
 231         },
 232         [SEC_PLAYBACK] = { /* Sec_Fifo Playback i/f */
 233                 .name = "Sec_FIFO TX",
 234                 .stream_name = "Playback",
 235                 .cpu_dai_name = "samsung-i2s.x",
 236                 .codec_dai_name = "wm8580-hifi-playback",
 237                 .platform_name = "samsung-audio",
 238                 .codec_name = "wm8580-codec.0-001b",
 239                 .init = smdk_wm8580_init_paifrx,
 240                 .ops = &smdk_ops,
 241         },
 242 };
 243
 244 static struct snd_soc_card smdk = {
 245         .name = "SMDK-I2S",
 246         .dai_link = smdk_dai,
 247         .num_links = 2,
 248 };
 249
 250 static struct platform_device *smdk_snd_device;
 251
 252 static int __init smdk_audio_init(void)
 253 {
 254         int ret;
 255         char *str;
 256
 257         if (machine_is_smdkc100() || machine_is_smdk6442()
 258                         || machine_is_smdkv210() || machine_is_smdkc110()) {
 259                 smdk.num_links = 3;
 260                 /* Secondary is at offset SAMSUNG_I2S_SECOFF from Primary */
 261                 str = (char *)smdk_dai[SEC_PLAYBACK].cpu_dai_name;
 262                 str[strlen(str) - 1] = '0' + SAMSUNG_I2S_SECOFF;
 263         } else if (machine_is_smdk6410()) {
 264                 str = (char *)smdk_dai[PRI_PLAYBACK].cpu_dai_name;
 265                 str[strlen(str) - 1] = '2';
 266                 str = (char *)smdk_dai[PRI_CAPTURE].cpu_dai_name;
 267                 str[strlen(str) - 1] = '2';
 268         }
 269
 270         smdk_snd_device = platform_device_alloc("soc-audio", -1);
 271         if (!smdk_snd_device)
 272                 return -ENOMEM;
 273
 274         platform_set_drvdata(smdk_snd_device, &smdk);
 275         ret = platform_device_add(smdk_snd_device);
 276
 277         if (ret)
 278                 platform_device_put(smdk_snd_device);
 279
 280         return ret;
 281 }
 282 module_init(smdk_audio_init);
 283
 284 static void __exit smdk_audio_exit(void)
 285 {
 286         platform_device_unregister(smdk_snd_device);
 287 }
 288 module_exit(smdk_audio_exit);
 289
 290 MODULE_AUTHOR("Jaswinder Singh, jassi.brar@samsung.com");
 291 MODULE_DESCRIPTION("ALSA SoC SMDK WM8580");
 292 MODULE_LICENSE("GPL");