LXR linux/sound/soc/samsung/smdk

   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
  29static 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 */
  96static struct snd_soc_ops smdk_ops = {
  97        .hw_params = smdk_hw_params,
  98};
  99
 100/* SMDK Playback widgets */
 101static 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 */
 111static 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
 132static 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
 142enum {
 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
 150static 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
 174static 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
 186static struct platform_device *smdk_snd_device;
 187
 188static 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}
 204module_init(smdk_audio_init);
 205
 206static void __exit smdk_audio_exit(void)
 207{
 208        platform_device_unregister(smdk_snd_device);
 209}
 210module_exit(smdk_audio_exit);
 211
 212MODULE_AUTHOR("Jaswinder Singh, jassisinghbrar@gmail.com");
 213MODULE_DESCRIPTION("ALSA SoC SMDK WM8580");
 214MODULE_LICENSE("GPL");
 215