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 "../codecs/wm8580.h"
  18 #include "i2s.h"
  19
  20 /*
  21  * Default CFG switch settings to use this driver:
  22  *
  23  *   SMDK6410: Set CFG1 1-3 Off, CFG2 1-4 On
  24  */
  25
  26 /* SMDK has a 12MHZ crystal attached to WM8580 */
  27 #define SMDK_WM8580_FREQ 12000000
  28
  29 static int smdk_hw_params(struct snd_pcm_substream *substream,
  30         struct snd_pcm_hw_params *params)
  31 {
  32         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  33         struct snd_soc_dai *codec_dai = rtd->codec_dai;
  34         unsigned int pll_out;
  35         int rfs, ret;
  36
  37         switch (params_width(params)) {
  38         case 8:
  39         case 16:
  40                 break;
  41         default:
  42                 return -EINVAL;
  43         }
  44
  45         /* The Fvco for WM8580 PLLs must fall within [90,100]MHz.
  46          * This criterion can't be met if we request PLL output
  47          * as {8000x256, 64000x256, 11025x256}Hz.
  48          * As a wayout, we rather change rfs to a minimum value that
  49          * results in (params_rate(params) * rfs), and itself, acceptable
  50          * to both - the CODEC and the CPU.
  51          */
  52         switch (params_rate(params)) {
  53         case 16000:
  54         case 22050:
  55         case 32000:
  56         case 44100:
  57         case 48000:
  58         case 88200:
  59         case 96000:
  60                 rfs = 256;
  61                 break;
  62         case 64000:
  63                 rfs = 384;
  64                 break;
  65         case 8000:
  66         case 11025:
  67                 rfs = 512;
  68                 break;
  69         default:
  70                 return -EINVAL;
  71         }
  72         pll_out = params_rate(params) * rfs;
  73
  74         /* Set WM8580 to drive MCLK from its PLLA */
  75         ret = snd_soc_dai_set_clkdiv(codec_dai, WM8580_MCLK,
  76                                         WM8580_CLKSRC_PLLA);
  77         if (ret < 0)
  78                 return ret;
  79
  80         ret = snd_soc_dai_set_pll(codec_dai, WM8580_PLLA, 0,
  81                                         SMDK_WM8580_FREQ, pll_out);
  82         if (ret < 0)
  83                 return ret;
  84
  85         ret = snd_soc_dai_set_sysclk(codec_dai, WM8580_CLKSRC_PLLA,
  86                                      pll_out, SND_SOC_CLOCK_IN);
  87         if (ret < 0)
  88                 return ret;
  89
  90         return 0;
  91 }
  92
  93 /*
  94  * SMDK WM8580 DAI operations.
  95  */
  96 static struct snd_soc_ops smdk_ops = {
  97         .hw_params = smdk_hw_params,
  98 };
  99
 100 /* SMDK Playback widgets */
 101 static const struct snd_soc_dapm_widget smdk_wm8580_dapm_widgets[] = {
 102         SND_SOC_DAPM_HP("Front", NULL),
 103         SND_SOC_DAPM_HP("Center+Sub", NULL),
 104         SND_SOC_DAPM_HP("Rear", NULL),
 105
 106         SND_SOC_DAPM_MIC("MicIn", NULL),
 107         SND_SOC_DAPM_LINE("LineIn", NULL),
 108 };
 109
 110 /* SMDK-PAIFTX connections */
 111 static const struct snd_soc_dapm_route smdk_wm8580_audio_map[] = {
 112         /* MicIn feeds AINL */
 113         {"AINL", NULL, "MicIn"},
 114
 115         /* LineIn feeds AINL/R */
 116         {"AINL", NULL, "LineIn"},
 117         {"AINR", NULL, "LineIn"},
 118
 119         /* Front Left/Right are fed VOUT1L/R */
 120         {"Front", NULL, "VOUT1L"},
 121         {"Front", NULL, "VOUT1R"},
 122
 123         /* Center/Sub are fed VOUT2L/R */
 124         {"Center+Sub", NULL, "VOUT2L"},
 125         {"Center+Sub", NULL, "VOUT2R"},
 126
 127         /* Rear Left/Right are fed VOUT3L/R */
 128         {"Rear", NULL, "VOUT3L"},
 129         {"Rear", NULL, "VOUT3R"},
 130 };
 131
 132 static int smdk_wm8580_init_paiftx(struct snd_soc_pcm_runtime *rtd)
 133 {
 134         /* Enabling the microphone requires the fitting of a 0R
 135          * resistor to connect the line from the microphone jack.
 136          */
 137         snd_soc_dapm_disable_pin(&rtd->card->dapm, "MicIn");
 138
 139         return 0;
 140 }
 141
 142 enum {
 143         PRI_PLAYBACK = 0,
 144         PRI_CAPTURE,
 145 };
 146
 147 #define SMDK_DAI_FMT (SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | \
 148         SND_SOC_DAIFMT_CBM_CFM)
 149
 150 static struct snd_soc_dai_link smdk_dai[] = {
 151         [PRI_PLAYBACK] = { /* Primary Playback i/f */
 152                 .name = "WM8580 PAIF RX",
 153                 .stream_name = "Playback",
 154                 .cpu_dai_name = "samsung-i2s.2",
 155                 .codec_dai_name = "wm8580-hifi-playback",
 156                 .platform_name = "samsung-i2s.0",
 157                 .codec_name = "wm8580.0-001b",
 158                 .dai_fmt = SMDK_DAI_FMT,
 159                 .ops = &smdk_ops,
 160         },
 161         [PRI_CAPTURE] = { /* Primary Capture i/f */
 162                 .name = "WM8580 PAIF TX",
 163                 .stream_name = "Capture",
 164                 .cpu_dai_name = "samsung-i2s.2",
 165                 .codec_dai_name = "wm8580-hifi-capture",
 166                 .platform_name = "samsung-i2s.0",
 167                 .codec_name = "wm8580.0-001b",
 168                 .dai_fmt = SMDK_DAI_FMT,
 169                 .init = smdk_wm8580_init_paiftx,
 170                 .ops = &smdk_ops,
 171         },
 172 };
 173
 174 static struct snd_soc_card smdk = {
 175         .name = "SMDK-I2S",
 176         .owner = THIS_MODULE,
 177         .dai_link = smdk_dai,
 178         .num_links = ARRAY_SIZE(smdk_dai),
 179
 180         .dapm_widgets = smdk_wm8580_dapm_widgets,
 181         .num_dapm_widgets = ARRAY_SIZE(smdk_wm8580_dapm_widgets),
 182         .dapm_routes = smdk_wm8580_audio_map,
 183         .num_dapm_routes = ARRAY_SIZE(smdk_wm8580_audio_map),
 184 };
 185
 186 static struct platform_device *smdk_snd_device;
 187
 188 static int __init smdk_audio_init(void)
 189 {
 190         int ret;
 191
 192         smdk_snd_device = platform_device_alloc("soc-audio", -1);
 193         if (!smdk_snd_device)
 194                 return -ENOMEM;
 195
 196         platform_set_drvdata(smdk_snd_device, &smdk);
 197         ret = platform_device_add(smdk_snd_device);
 198
 199         if (ret)
 200                 platform_device_put(smdk_snd_device);
 201
 202         return ret;
 203 }
 204 module_init(smdk_audio_init);
 205
 206 static void __exit smdk_audio_exit(void)
 207 {
 208         platform_device_unregister(smdk_snd_device);
 209 }
 210 module_exit(smdk_audio_exit);
 211
 212 MODULE_AUTHOR("Jaswinder Singh, jassisinghbrar@gmail.com");
 213 MODULE_DESCRIPTION("ALSA SoC SMDK WM8580");
 214 MODULE_LICENSE("GPL");