LXR linux/sound/soc/pxa/zylonite.c

   1/*
   2 * zylonite.c  --  SoC audio for Zylonite
   3 *
   4 * Copyright 2008 Wolfson Microelectronics PLC.
   5 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
   6 *
   7 * This program is free software; you can redistribute it and/or
   8 * modify it under the terms of the GNU General Public License as
   9 * published by the Free Software Foundation; either version 2 of the
  10 * License, or (at your option) any later version.
  11 *
  12 */
  13
  14#include <linux/module.h>
  15#include <linux/moduleparam.h>
  16#include <linux/device.h>
  17#include <linux/clk.h>
  18#include <linux/i2c.h>
  19#include <sound/core.h>
  20#include <sound/pcm.h>
  21#include <sound/pcm_params.h>
  22#include <sound/soc.h>
  23
  24#include "../codecs/wm9713.h"
  25#include "pxa2xx-ac97.h"
  26#include "pxa-ssp.h"
  27
  28/*
  29 * There is a physical switch SW15 on the board which changes the MCLK
  30 * for the WM9713 between the standard AC97 master clock and the
  31 * output of the CLK_POUT signal from the PXA.
  32 */
  33static int clk_pout;
  34module_param(clk_pout, int, 0);
  35MODULE_PARM_DESC(clk_pout, "Use CLK_POUT as WM9713 MCLK (SW15 on board).");
  36
  37static struct clk *pout;
  38
  39static struct snd_soc_card zylonite;
  40
  41static const struct snd_soc_dapm_widget zylonite_dapm_widgets[] = {
  42        SND_SOC_DAPM_HP("Headphone", NULL),
  43        SND_SOC_DAPM_MIC("Headset Microphone", NULL),
  44        SND_SOC_DAPM_MIC("Handset Microphone", NULL),
  45        SND_SOC_DAPM_SPK("Multiactor", NULL),
  46        SND_SOC_DAPM_SPK("Headset Earpiece", NULL),
  47};
  48
  49/* Currently supported audio map */
  50static const struct snd_soc_dapm_route audio_map[] = {
  51
  52        /* Headphone output connected to HPL/HPR */
  53        { "Headphone", NULL,  "HPL" },
  54        { "Headphone", NULL,  "HPR" },
  55
  56        /* On-board earpiece */
  57        { "Headset Earpiece", NULL, "OUT3" },
  58
  59        /* Headphone mic */
  60        { "MIC2A", NULL, "Mic Bias" },
  61        { "Mic Bias", NULL, "Headset Microphone" },
  62
  63        /* On-board mic */
  64        { "MIC1", NULL, "Mic Bias" },
  65        { "Mic Bias", NULL, "Handset Microphone" },
  66
  67        /* Multiactor differentially connected over SPKL/SPKR */
  68        { "Multiactor", NULL, "SPKL" },
  69        { "Multiactor", NULL, "SPKR" },
  70};
  71
  72static int zylonite_wm9713_init(struct snd_soc_pcm_runtime *rtd)
  73{
  74        struct snd_soc_codec *codec = rtd->codec;
  75        struct snd_soc_dapm_context *dapm = &codec->dapm;
  76
  77        if (clk_pout)
  78                snd_soc_dai_set_pll(rtd->codec_dai, 0, 0,
  79                                    clk_get_rate(pout), 0);
  80
  81        snd_soc_dapm_new_controls(dapm, zylonite_dapm_widgets,
  82                                  ARRAY_SIZE(zylonite_dapm_widgets));
  83
  84        snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map));
  85
  86        /* Static setup for now */
  87        snd_soc_dapm_enable_pin(dapm, "Headphone");
  88        snd_soc_dapm_enable_pin(dapm, "Headset Earpiece");
  89
  90        snd_soc_dapm_sync(dapm);
  91        return 0;
  92}
  93
  94static int zylonite_voice_hw_params(struct snd_pcm_substream *substream,
  95                                    struct snd_pcm_hw_params *params)
  96{
  97        struct snd_soc_pcm_runtime *rtd = substream->private_data;
  98        struct snd_soc_dai *codec_dai = rtd->codec_dai;
  99        struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 100        unsigned int pll_out = 0;
 101        unsigned int wm9713_div = 0;
 102        int ret = 0;
 103        int rate = params_rate(params);
 104        int width = snd_pcm_format_physical_width(params_format(params));
 105
 106        /* Only support ratios that we can generate neatly from the AC97
 107         * based master clock - in particular, this excludes 44.1kHz.
 108         * In most applications the voice DAC will be used for telephony
 109         * data so multiples of 8kHz will be the common case.
 110         */
 111        switch (rate) {
 112        case 8000:
 113                wm9713_div = 12;
 114                break;
 115        case 16000:
 116                wm9713_div = 6;
 117                break;
 118        case 48000:
 119                wm9713_div = 2;
 120                break;
 121        default:
 122                /* Don't support OSS emulation */
 123                return -EINVAL;
 124        }
 125
 126        /* Add 1 to the width for the leading clock cycle */
 127        pll_out = rate * (width + 1) * 8;
 128
 129        ret = snd_soc_dai_set_sysclk(cpu_dai, PXA_SSP_CLK_AUDIO, 0, 1);
 130        if (ret < 0)
 131                return ret;
 132
 133        ret = snd_soc_dai_set_pll(cpu_dai, 0, 0, 0, pll_out);
 134        if (ret < 0)
 135                return ret;
 136
 137        if (clk_pout)
 138                ret = snd_soc_dai_set_clkdiv(codec_dai, WM9713_PCMCLK_PLL_DIV,
 139                                             WM9713_PCMDIV(wm9713_div));
 140        else
 141                ret = snd_soc_dai_set_clkdiv(codec_dai, WM9713_PCMCLK_DIV,
 142                                             WM9713_PCMDIV(wm9713_div));
 143        if (ret < 0)
 144                return ret;
 145
 146        ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
 147                SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
 148        if (ret < 0)
 149                return ret;
 150
 151        ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
 152                SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
 153        if (ret < 0)
 154                return ret;
 155
 156        return 0;
 157}
 158
 159static struct snd_soc_ops zylonite_voice_ops = {
 160        .hw_params = zylonite_voice_hw_params,
 161};
 162
 163static struct snd_soc_dai_link zylonite_dai[] = {
 164{
 165        .name = "AC97",
 166        .stream_name = "AC97 HiFi",
 167        .codec_name = "wm9713-codec",
 168        .platform_name = "pxa-pcm-audio",
 169        .cpu_dai_name = "pxa2xx-ac97",
 170        .codec_dai_name = "wm9713-hifi",
 171        .init = zylonite_wm9713_init,
 172},
 173{
 174        .name = "AC97 Aux",
 175        .stream_name = "AC97 Aux",
 176        .codec_name = "wm9713-codec",
 177        .platform_name = "pxa-pcm-audio",
 178        .cpu_dai_name = "pxa2xx-ac97-aux",
 179        .codec_dai_name = "wm9713-aux",
 180},
 181{
 182        .name = "WM9713 Voice",
 183        .stream_name = "WM9713 Voice",
 184        .codec_name = "wm9713-codec",
 185        .platform_name = "pxa-pcm-audio",
 186        .cpu_dai_name = "pxa-ssp-dai.2",
 187        .codec_dai_name = "wm9713-voice",
 188        .ops = &zylonite_voice_ops,
 189},
 190};
 191
 192static int zylonite_probe(struct snd_soc_card *card)
 193{
 194        int ret;
 195
 196        if (clk_pout) {
 197                pout = clk_get(NULL, "CLK_POUT");
 198                if (IS_ERR(pout)) {
 199                        dev_err(card->dev, "Unable to obtain CLK_POUT: %ld\n",
 200                                PTR_ERR(pout));
 201                        return PTR_ERR(pout);
 202                }
 203
 204                ret = clk_enable(pout);
 205                if (ret != 0) {
 206                        dev_err(card->dev, "Unable to enable CLK_POUT: %d\n",
 207                                ret);
 208                        clk_put(pout);
 209                        return ret;
 210                }
 211
 212                dev_dbg(card->dev, "MCLK enabled at %luHz\n",
 213                        clk_get_rate(pout));
 214        }
 215
 216        return 0;
 217}
 218
 219static int zylonite_remove(struct snd_soc_card *card)
 220{
 221        if (clk_pout) {
 222                clk_disable(pout);
 223                clk_put(pout);
 224        }
 225
 226        return 0;
 227}
 228
 229static int zylonite_suspend_post(struct snd_soc_card *card)
 230{
 231        if (clk_pout)
 232                clk_disable(pout);
 233
 234        return 0;
 235}
 236
 237static int zylonite_resume_pre(struct snd_soc_card *card)
 238{
 239        int ret = 0;
 240
 241        if (clk_pout) {
 242                ret = clk_enable(pout);
 243                if (ret != 0)
 244                        dev_err(card->dev, "Unable to enable CLK_POUT: %d\n",
 245                                ret);
 246        }
 247
 248        return ret;
 249}
 250
 251static struct snd_soc_card zylonite = {
 252        .name = "Zylonite",
 253        .probe = &zylonite_probe,
 254        .remove = &zylonite_remove,
 255        .suspend_post = &zylonite_suspend_post,
 256        .resume_pre = &zylonite_resume_pre,
 257        .dai_link = zylonite_dai,
 258        .num_links = ARRAY_SIZE(zylonite_dai),
 259        .owner = THIS_MODULE,
 260};
 261
 262static struct platform_device *zylonite_snd_ac97_device;
 263
 264static int __init zylonite_init(void)
 265{
 266        int ret;
 267
 268        zylonite_snd_ac97_device = platform_device_alloc("soc-audio", -1);
 269        if (!zylonite_snd_ac97_device)
 270                return -ENOMEM;
 271
 272        platform_set_drvdata(zylonite_snd_ac97_device, &zylonite);
 273
 274        ret = platform_device_add(zylonite_snd_ac97_device);
 275        if (ret != 0)
 276                platform_device_put(zylonite_snd_ac97_device);
 277
 278        return ret;
 279}
 280
 281static void __exit zylonite_exit(void)
 282{
 283        platform_device_unregister(zylonite_snd_ac97_device);
 284}
 285
 286module_init(zylonite_init);
 287module_exit(zylonite_exit);
 288
 289MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
 290MODULE_DESCRIPTION("ALSA SoC WM9713 Zylonite");
 291MODULE_LICENSE("GPL");
 292