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