kernel/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 *codec_dai = rtd->codec_dai;
  36         unsigned int pll_out;
  37         int bfs, rfs, ret;
  38
  39         switch (params_width(params)) {
  40         case 8:
  41                 bfs = 16;
  42                 break;
  43         case 16:
  44                 bfs = 32;
  45                 break;
  46         default:
  47                 return -EINVAL;
  48         }
  49
  50         /* The Fvco for WM8580 PLLs must fall within [90,100]MHz.
  51          * This criterion can't be met if we request PLL output
  52          * as {8000x256, 64000x256, 11025x256}Hz.
  53          * As a wayout, we rather change rfs to a minimum value that
  54          * results in (params_rate(params) * rfs), and itself, acceptable
  55          * to both - the CODEC and the CPU.
  56          */
  57         switch (params_rate(params)) {
  58         case 16000:
  59         case 22050:
  60         case 32000:
  61         case 44100:
  62         case 48000:
  63         case 88200:
  64         case 96000:
  65                 rfs = 256;
  66                 break;
  67         case 64000:
  68                 rfs = 384;
  69                 break;
  70         case 8000:
  71         case 11025:
  72                 rfs = 512;
  73                 break;
  74         default:
  75                 return -EINVAL;
  76         }
  77         pll_out = params_rate(params) * rfs;
  78
  79         /* Set WM8580 to drive MCLK from its PLLA */
  80         ret = snd_soc_dai_set_clkdiv(codec_dai, WM8580_MCLK,
  81                                         WM8580_CLKSRC_PLLA);
  82         if (ret < 0)
  83                 return ret;
  84
  85         ret = snd_soc_dai_set_pll(codec_dai, WM8580_PLLA, 0,
  86                                         SMDK_WM8580_FREQ, pll_out);
  87         if (ret < 0)
  88                 return ret;
  89
  90         ret = snd_soc_dai_set_sysclk(codec_dai, WM8580_CLKSRC_PLLA,
  91                                      pll_out, SND_SOC_CLOCK_IN);
  92         if (ret < 0)
  93                 return ret;
  94
  95         return 0;
  96 }
  97
  98 /*
  99  * SMDK WM8580 DAI operations.
 100  */
 101 static struct snd_soc_ops smdk_ops = {
 102         .hw_params = smdk_hw_params,
 103 };
 104
 105 /* SMDK Playback widgets */
 106 static const struct snd_soc_dapm_widget smdk_wm8580_dapm_widgets[] = {
 107         SND_SOC_DAPM_HP("Front", NULL),
 108         SND_SOC_DAPM_HP("Center+Sub", NULL),
 109         SND_SOC_DAPM_HP("Rear", NULL),
 110
 111         SND_SOC_DAPM_MIC("MicIn", NULL),
 112         SND_SOC_DAPM_LINE("LineIn", NULL),
 113 };
 114
 115 /* SMDK-PAIFTX connections */
 116 static const struct snd_soc_dapm_route smdk_wm8580_audio_map[] = {
 117         /* MicIn feeds AINL */
 118         {"AINL", NULL, "MicIn"},
 119
 120         /* LineIn feeds AINL/R */
 121         {"AINL", NULL, "LineIn"},
 122         {"AINR", NULL, "LineIn"},
 123
 124         /* Front Left/Right are fed VOUT1L/R */
 125         {"Front", NULL, "VOUT1L"},
 126         {"Front", NULL, "VOUT1R"},
 127
 128         /* Center/Sub are fed VOUT2L/R */
 129         {"Center+Sub", NULL, "VOUT2L"},
 130         {"Center+Sub", NULL, "VOUT2R"},
 131
 132         /* Rear Left/Right are fed VOUT3L/R */
 133         {"Rear", NULL, "VOUT3L"},
 134         {"Rear", NULL, "VOUT3R"},
 135 };
 136
 137 static int smdk_wm8580_init_paiftx(struct snd_soc_pcm_runtime *rtd)
 138 {
 139         /* Enabling the microphone requires the fitting of a 0R
 140          * resistor to connect the line from the microphone jack.
 141          */
 142         snd_soc_dapm_disable_pin(&rtd->card->dapm, "MicIn");
 143
 144         return 0;
 145 }
 146
 147 enum {
 148         PRI_PLAYBACK = 0,
 149         PRI_CAPTURE,
 150         SEC_PLAYBACK,
 151 };
 152
 153 #define SMDK_DAI_FMT (SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | \
 154         SND_SOC_DAIFMT_CBM_CFM)
 155
 156 static struct snd_soc_dai_link smdk_dai[] = {
 157         [PRI_PLAYBACK] = { /* Primary Playback i/f */
 158                 .name = "WM8580 PAIF RX",
 159                 .stream_name = "Playback",
 160                 .cpu_dai_name = "samsung-i2s.0",
 161                 .codec_dai_name = "wm8580-hifi-playback",
 162                 .platform_name = "samsung-i2s.0",
 163                 .codec_name = "wm8580.0-001b",
 164                 .dai_fmt = SMDK_DAI_FMT,
 165                 .ops = &smdk_ops,
 166         },
 167         [PRI_CAPTURE] = { /* Primary Capture i/f */
 168                 .name = "WM8580 PAIF TX",
 169                 .stream_name = "Capture",
 170                 .cpu_dai_name = "samsung-i2s.0",
 171                 .codec_dai_name = "wm8580-hifi-capture",
 172                 .platform_name = "samsung-i2s.0",
 173                 .codec_name = "wm8580.0-001b",
 174                 .dai_fmt = SMDK_DAI_FMT,
 175                 .init = smdk_wm8580_init_paiftx,
 176                 .ops = &smdk_ops,
 177         },
 178         [SEC_PLAYBACK] = { /* Sec_Fifo Playback i/f */
 179                 .name = "Sec_FIFO TX",
 180                 .stream_name = "Playback",
 181                 .cpu_dai_name = "samsung-i2s-sec",
 182                 .codec_dai_name = "wm8580-hifi-playback",
 183                 .platform_name = "samsung-i2s-sec",
 184                 .codec_name = "wm8580.0-001b",
 185                 .dai_fmt = SMDK_DAI_FMT,
 186                 .ops = &smdk_ops,
 187         },
 188 };
 189
 190 static struct snd_soc_card smdk = {
 191         .name = "SMDK-I2S",
 192         .owner = THIS_MODULE,
 193         .dai_link = smdk_dai,
 194         .num_links = 2,
 195
 196         .dapm_widgets = smdk_wm8580_dapm_widgets,
 197         .num_dapm_widgets = ARRAY_SIZE(smdk_wm8580_dapm_widgets),
 198         .dapm_routes = smdk_wm8580_audio_map,
 199         .num_dapm_routes = ARRAY_SIZE(smdk_wm8580_audio_map),
 200 };
 201
 202 static struct platform_device *smdk_snd_device;
 203
 204 static int __init smdk_audio_init(void)
 205 {
 206         int ret;
 207         char *str;
 208
 209         if (machine_is_smdkc100()
 210                         || machine_is_smdkv210() || machine_is_smdkc110()) {
 211                 smdk.num_links = 3;
 212         } else if (machine_is_smdk6410()) {
 213                 str = (char *)smdk_dai[PRI_PLAYBACK].cpu_dai_name;
 214                 str[strlen(str) - 1] = '2';
 215                 str = (char *)smdk_dai[PRI_CAPTURE].cpu_dai_name;
 216                 str[strlen(str) - 1] = '2';
 217         }
 218
 219         smdk_snd_device = platform_device_alloc("soc-audio", -1);
 220         if (!smdk_snd_device)
 221                 return -ENOMEM;
 222
 223         platform_set_drvdata(smdk_snd_device, &smdk);
 224         ret = platform_device_add(smdk_snd_device);
 225
 226         if (ret)
 227                 platform_device_put(smdk_snd_device);
 228
 229         return ret;
 230 }
 231 module_init(smdk_audio_init);
 232
 233 static void __exit smdk_audio_exit(void)
 234 {
 235         platform_device_unregister(smdk_snd_device);
 236 }
 237 module_exit(smdk_audio_exit);
 238
 239 MODULE_AUTHOR("Jaswinder Singh, jassisinghbrar@gmail.com");
 240 MODULE_DESCRIPTION("ALSA SoC SMDK WM8580");
 241 MODULE_LICENSE("GPL");