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_width(params)) {
  41         case 8:
  42                 bfs = 16;
  43                 break;
  44         case 16:
  45                 bfs = 32;
  46                 break;
  47         default:
  48                 return -EINVAL;
  49         }
  50
  51         /* The Fvco for WM8580 PLLs must fall within [90,100]MHz.
  52          * This criterion can't be met if we request PLL output
  53          * as {8000x256, 64000x256, 11025x256}Hz.
  54          * As a wayout, we rather change rfs to a minimum value that
  55          * results in (params_rate(params) * rfs), and itself, acceptable
  56          * to both - the CODEC and the CPU.
  57          */
  58         switch (params_rate(params)) {
  59         case 16000:
  60         case 22050:
  61         case 32000:
  62         case 44100:
  63         case 48000:
  64         case 88200:
  65         case 96000:
  66                 rfs = 256;
  67                 break;
  68         case 64000:
  69                 rfs = 384;
  70                 break;
  71         case 8000:
  72         case 11025:
  73                 rfs = 512;
  74                 break;
  75         default:
  76                 return -EINVAL;
  77         }
  78         pll_out = params_rate(params) * rfs;
  79
  80         /* Set the Codec DAI configuration */
  81         ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S
  82                                          | SND_SOC_DAIFMT_NB_NF
  83                                          | SND_SOC_DAIFMT_CBM_CFM);
  84         if (ret < 0)
  85                 return ret;
  86
  87         /* Set the AP DAI configuration */
  88         ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S
  89                                          | SND_SOC_DAIFMT_NB_NF
  90                                          | SND_SOC_DAIFMT_CBM_CFM);
  91         if (ret < 0)
  92                 return ret;
  93
  94         /* Set WM8580 to drive MCLK from its PLLA */
  95         ret = snd_soc_dai_set_clkdiv(codec_dai, WM8580_MCLK,
  96                                         WM8580_CLKSRC_PLLA);
  97         if (ret < 0)
  98                 return ret;
  99
 100         ret = snd_soc_dai_set_pll(codec_dai, WM8580_PLLA, 0,
 101                                         SMDK_WM8580_FREQ, pll_out);
 102         if (ret < 0)
 103                 return ret;
 104
 105         ret = snd_soc_dai_set_sysclk(codec_dai, WM8580_CLKSRC_PLLA,
 106                                      pll_out, SND_SOC_CLOCK_IN);
 107         if (ret < 0)
 108                 return ret;
 109
 110         return 0;
 111 }
 112
 113 /*
 114  * SMDK WM8580 DAI operations.
 115  */
 116 static struct snd_soc_ops smdk_ops = {
 117         .hw_params = smdk_hw_params,
 118 };
 119
 120 /* SMDK Playback widgets */
 121 static const struct snd_soc_dapm_widget smdk_wm8580_dapm_widgets[] = {
 122         SND_SOC_DAPM_HP("Front", NULL),
 123         SND_SOC_DAPM_HP("Center+Sub", NULL),
 124         SND_SOC_DAPM_HP("Rear", NULL),
 125
 126         SND_SOC_DAPM_MIC("MicIn", NULL),
 127         SND_SOC_DAPM_LINE("LineIn", NULL),
 128 };
 129
 130 /* SMDK-PAIFTX connections */
 131 static const struct snd_soc_dapm_route smdk_wm8580_audio_map[] = {
 132         /* MicIn feeds AINL */
 133         {"AINL", NULL, "MicIn"},
 134
 135         /* LineIn feeds AINL/R */
 136         {"AINL", NULL, "LineIn"},
 137         {"AINR", NULL, "LineIn"},
 138
 139         /* Front Left/Right are fed VOUT1L/R */
 140         {"Front", NULL, "VOUT1L"},
 141         {"Front", NULL, "VOUT1R"},
 142
 143         /* Center/Sub are fed VOUT2L/R */
 144         {"Center+Sub", NULL, "VOUT2L"},
 145         {"Center+Sub", NULL, "VOUT2R"},
 146
 147         /* Rear Left/Right are fed VOUT3L/R */
 148         {"Rear", NULL, "VOUT3L"},
 149         {"Rear", NULL, "VOUT3R"},
 150 };
 151
 152 static int smdk_wm8580_init_paiftx(struct snd_soc_pcm_runtime *rtd)
 153 {
 154         struct snd_soc_codec *codec = rtd->codec;
 155         struct snd_soc_dapm_context *dapm = &codec->dapm;
 156
 157         /* Enabling the microphone requires the fitting of a 0R
 158          * resistor to connect the line from the microphone jack.
 159          */
 160         snd_soc_dapm_disable_pin(dapm, "MicIn");
 161
 162         return 0;
 163 }
 164
 165 enum {
 166         PRI_PLAYBACK = 0,
 167         PRI_CAPTURE,
 168         SEC_PLAYBACK,
 169 };
 170
 171 static struct snd_soc_dai_link smdk_dai[] = {
 172         [PRI_PLAYBACK] = { /* Primary Playback i/f */
 173                 .name = "WM8580 PAIF RX",
 174                 .stream_name = "Playback",
 175                 .cpu_dai_name = "samsung-i2s.0",
 176                 .codec_dai_name = "wm8580-hifi-playback",
 177                 .platform_name = "samsung-i2s.0",
 178                 .codec_name = "wm8580.0-001b",
 179                 .ops = &smdk_ops,
 180         },
 181         [PRI_CAPTURE] = { /* Primary Capture i/f */
 182                 .name = "WM8580 PAIF TX",
 183                 .stream_name = "Capture",
 184                 .cpu_dai_name = "samsung-i2s.0",
 185                 .codec_dai_name = "wm8580-hifi-capture",
 186                 .platform_name = "samsung-i2s.0",
 187                 .codec_name = "wm8580.0-001b",
 188                 .init = smdk_wm8580_init_paiftx,
 189                 .ops = &smdk_ops,
 190         },
 191         [SEC_PLAYBACK] = { /* Sec_Fifo Playback i/f */
 192                 .name = "Sec_FIFO TX",
 193                 .stream_name = "Playback",
 194                 .cpu_dai_name = "samsung-i2s-sec",
 195                 .codec_dai_name = "wm8580-hifi-playback",
 196                 .platform_name = "samsung-i2s-sec",
 197                 .codec_name = "wm8580.0-001b",
 198                 .ops = &smdk_ops,
 199         },
 200 };
 201
 202 static struct snd_soc_card smdk = {
 203         .name = "SMDK-I2S",
 204         .owner = THIS_MODULE,
 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         } else if (machine_is_smdk6410()) {
 225                 str = (char *)smdk_dai[PRI_PLAYBACK].cpu_dai_name;
 226                 str[strlen(str) - 1] = '2';
 227                 str = (char *)smdk_dai[PRI_CAPTURE].cpu_dai_name;
 228                 str[strlen(str) - 1] = '2';
 229         }
 230
 231         smdk_snd_device = platform_device_alloc("soc-audio", -1);
 232         if (!smdk_snd_device)
 233                 return -ENOMEM;
 234
 235         platform_set_drvdata(smdk_snd_device, &smdk);
 236         ret = platform_device_add(smdk_snd_device);
 237
 238         if (ret)
 239                 platform_device_put(smdk_snd_device);
 240
 241         return ret;
 242 }
 243 module_init(smdk_audio_init);
 244
 245 static void __exit smdk_audio_exit(void)
 246 {
 247         platform_device_unregister(smdk_snd_device);
 248 }
 249 module_exit(smdk_audio_exit);
 250
 251 MODULE_AUTHOR("Jaswinder Singh, jassisinghbrar@gmail.com");
 252 MODULE_DESCRIPTION("ALSA SoC SMDK WM8580");
 253 MODULE_LICENSE("GPL");