sound/soc/samsung/smdk_wm8580.c

   1 /*
   2  *  smdk_wm8580.c
   3  *
   4  *  Copyright (c) 2009 Samsung Electronics Co. Ltd
   5  *  Author: Jaswinder Singh <jassisinghbrar@gmail.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/module.h>
  14 #include <sound/soc.h>
  15 #include <sound/pcm_params.h>
  16
  17 #include <asm/mach-types.h>
  18
  19 #include "../codecs/wm8580.h"
  20 #include "i2s.h"
  21
  22 /*
  23  * Default CFG switch settings to use this driver:
  24  *
  25  *   SMDK6410: Set CFG1 1-3 Off, CFG2 1-4 On
  26  */
  27
  28 /* SMDK has a 12MHZ crystal attached to WM8580 */
  29 #define SMDK_WM8580_FREQ 12000000
  30
  31 static int smdk_hw_params(struct snd_pcm_substream *substream,
  32         struct snd_pcm_hw_params *params)
  33 {
  34         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  35         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  36         struct snd_soc_dai *codec_dai = rtd->codec_dai;
  37         unsigned int pll_out;
  38         int bfs, rfs, ret;
  39
  40         switch (params_format(params)) {
  41         case SNDRV_PCM_FORMAT_U8:
  42         case SNDRV_PCM_FORMAT_S8:
  43                 bfs = 16;
  44                 break;
  45         case SNDRV_PCM_FORMAT_U16_LE:
  46         case SNDRV_PCM_FORMAT_S16_LE:
  47                 bfs = 32;
  48                 break;
  49         default:
  50                 return -EINVAL;
  51         }
  52
  53         /* The Fvco for WM8580 PLLs must fall within [90,100]MHz.
  54          * This criterion can't be met if we request PLL output
  55          * as {8000x256, 64000x256, 11025x256}Hz.
  56          * As a wayout, we rather change rfs to a minimum value that
  57          * results in (params_rate(params) * rfs), and itself, acceptable
  58          * to both - the CODEC and the CPU.
  59          */
  60         switch (params_rate(params)) {
  61         case 16000:
  62         case 22050:
  63         case 32000:
  64         case 44100:
  65         case 48000:
  66         case 88200:
  67         case 96000:
  68                 rfs = 256;
  69                 break;
  70         case 64000:
  71                 rfs = 384;
  72                 break;
  73         case 8000:
  74         case 11025:
  75                 rfs = 512;
  76                 break;
  77         default:
  78                 return -EINVAL;
  79         }
  80         pll_out = params_rate(params) * rfs;
  81
  82         /* Set the Codec DAI configuration */
  83         ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S
  84                                          | SND_SOC_DAIFMT_NB_NF
  85                                          | SND_SOC_DAIFMT_CBM_CFM);
  86         if (ret < 0)
  87                 return ret;
  88
  89         /* Set the AP DAI configuration */
  90         ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S
  91                                          | SND_SOC_DAIFMT_NB_NF
  92                                          | SND_SOC_DAIFMT_CBM_CFM);
  93         if (ret < 0)
  94                 return ret;
  95
  96         /* Set WM8580 to drive MCLK from its PLLA */
  97         ret = snd_soc_dai_set_clkdiv(codec_dai, WM8580_MCLK,
  98                                         WM8580_CLKSRC_PLLA);
  99         if (ret < 0)
 100                 return ret;
 101
 102         ret = snd_soc_dai_set_pll(codec_dai, WM8580_PLLA, 0,
 103                                         SMDK_WM8580_FREQ, pll_out);
 104         if (ret < 0)
 105                 return ret;
 106
 107         ret = snd_soc_dai_set_sysclk(codec_dai, WM8580_CLKSRC_PLLA,
 108                                      pll_out, SND_SOC_CLOCK_IN);
 109         if (ret < 0)
 110                 return ret;
 111
 112         return 0;
 113 }
 114
 115 /*
 116  * SMDK WM8580 DAI operations.
 117  */
 118 static struct snd_soc_ops smdk_ops = {
 119         .hw_params = smdk_hw_params,
 120 };
 121
 122 /* SMDK Playback widgets */
 123 static const struct snd_soc_dapm_widget smdk_wm8580_dapm_widgets[] = {
 124         SND_SOC_DAPM_HP("Front", NULL),
 125         SND_SOC_DAPM_HP("Center+Sub", NULL),
 126         SND_SOC_DAPM_HP("Rear", NULL),
 127
 128         SND_SOC_DAPM_MIC("MicIn", NULL),
 129         SND_SOC_DAPM_LINE("LineIn", NULL),
 130 };
 131
 132 /* SMDK-PAIFTX connections */
 133 static const struct snd_soc_dapm_route smdk_wm8580_audio_map[] = {
 134         /* MicIn feeds AINL */
 135         {"AINL", NULL, "MicIn"},
 136
 137         /* LineIn feeds AINL/R */
 138         {"AINL", NULL, "LineIn"},
 139         {"AINR", NULL, "LineIn"},
 140
 141         /* Front Left/Right are fed VOUT1L/R */
 142         {"Front", NULL, "VOUT1L"},
 143         {"Front", NULL, "VOUT1R"},
 144
 145         /* Center/Sub are fed VOUT2L/R */
 146         {"Center+Sub", NULL, "VOUT2L"},
 147         {"Center+Sub", NULL, "VOUT2R"},
 148
 149         /* Rear Left/Right are fed VOUT3L/R */
 150         {"Rear", NULL, "VOUT3L"},
 151         {"Rear", NULL, "VOUT3R"},
 152 };
 153
 154 static int smdk_wm8580_init_paiftx(struct snd_soc_pcm_runtime *rtd)
 155 {
 156         struct snd_soc_codec *codec = rtd->codec;
 157         struct snd_soc_dapm_context *dapm = &codec->dapm;
 158
 159         /* Enabling the microphone requires the fitting of a 0R
 160          * resistor to connect the line from the microphone jack.
 161          */
 162         snd_soc_dapm_disable_pin(dapm, "MicIn");
 163
 164         return 0;
 165 }
 166
 167 enum {
 168         PRI_PLAYBACK = 0,
 169         PRI_CAPTURE,
 170         SEC_PLAYBACK,
 171 };
 172
 173 static struct snd_soc_dai_link smdk_dai[] = {
 174         [PRI_PLAYBACK] = { /* Primary Playback i/f */
 175                 .name = "WM8580 PAIF RX",
 176                 .stream_name = "Playback",
 177                 .cpu_dai_name = "samsung-i2s.0",
 178                 .codec_dai_name = "wm8580-hifi-playback",
 179                 .platform_name = "samsung-i2s.0",
 180                 .codec_name = "wm8580.0-001b",
 181                 .ops = &smdk_ops,
 182         },
 183         [PRI_CAPTURE] = { /* Primary Capture i/f */
 184                 .name = "WM8580 PAIF TX",
 185                 .stream_name = "Capture",
 186                 .cpu_dai_name = "samsung-i2s.0",
 187                 .codec_dai_name = "wm8580-hifi-capture",
 188                 .platform_name = "samsung-i2s.0",
 189                 .codec_name = "wm8580.0-001b",
 190                 .init = smdk_wm8580_init_paiftx,
 191                 .ops = &smdk_ops,
 192         },
 193         [SEC_PLAYBACK] = { /* Sec_Fifo Playback i/f */
 194                 .name = "Sec_FIFO TX",
 195                 .stream_name = "Playback",
 196                 .cpu_dai_name = "samsung-i2s.x",
 197                 .codec_dai_name = "wm8580-hifi-playback",
 198                 .platform_name = "samsung-i2s.x",
 199                 .codec_name = "wm8580.0-001b",
 200                 .ops = &smdk_ops,
 201         },
 202 };
 203
 204 static struct snd_soc_card smdk = {
 205         .name = "SMDK-I2S",
 206         .owner = THIS_MODULE,
 207         .dai_link = smdk_dai,
 208         .num_links = 2,
 209
 210         .dapm_widgets = smdk_wm8580_dapm_widgets,
 211         .num_dapm_widgets = ARRAY_SIZE(smdk_wm8580_dapm_widgets),
 212         .dapm_routes = smdk_wm8580_audio_map,
 213         .num_dapm_routes = ARRAY_SIZE(smdk_wm8580_audio_map),
 214 };
 215
 216 static struct platform_device *smdk_snd_device;
 217
 218 static int __init smdk_audio_init(void)
 219 {
 220         int ret;
 221         char *str;
 222
 223         if (machine_is_smdkc100()
 224                         || machine_is_smdkv210() || machine_is_smdkc110()) {
 225                 smdk.num_links = 3;
 226                 /* Secondary is at offset SAMSUNG_I2S_SECOFF from Primary */
 227                 str = (char *)smdk_dai[SEC_PLAYBACK].cpu_dai_name;
 228                 str[strlen(str) - 1] = '0' + SAMSUNG_I2S_SECOFF;
 229         } else if (machine_is_smdk6410()) {
 230                 str = (char *)smdk_dai[PRI_PLAYBACK].cpu_dai_name;
 231                 str[strlen(str) - 1] = '2';
 232                 str = (char *)smdk_dai[PRI_CAPTURE].cpu_dai_name;
 233                 str[strlen(str) - 1] = '2';
 234         }
 235
 236         smdk_snd_device = platform_device_alloc("soc-audio", -1);
 237         if (!smdk_snd_device)
 238                 return -ENOMEM;
 239
 240         platform_set_drvdata(smdk_snd_device, &smdk);
 241         ret = platform_device_add(smdk_snd_device);
 242
 243         if (ret)
 244                 platform_device_put(smdk_snd_device);
 245
 246         return ret;
 247 }
 248 module_init(smdk_audio_init);
 249
 250 static void __exit smdk_audio_exit(void)
 251 {
 252         platform_device_unregister(smdk_snd_device);
 253 }
 254 module_exit(smdk_audio_exit);
 255
 256 MODULE_AUTHOR("Jaswinder Singh, jassisinghbrar@gmail.com");
 257 MODULE_DESCRIPTION("ALSA SoC SMDK WM8580");
 258 MODULE_LICENSE("GPL");