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 #include <sound/soc-dapm.h>
  24
  25 #include "../codecs/wm9713.h"
  26 #include "pxa2xx-pcm.h"
  27 #include "pxa2xx-ac97.h"
  28 #include "pxa-ssp.h"
  29
  30 /*
  31  * There is a physical switch SW15 on the board which changes the MCLK
  32  * for the WM9713 between the standard AC97 master clock and the
  33  * output of the CLK_POUT signal from the PXA.
  34  */
  35 static int clk_pout;
  36 module_param(clk_pout, int, 0);
  37 MODULE_PARM_DESC(clk_pout, "Use CLK_POUT as WM9713 MCLK (SW15 on board).");
  38
  39 static struct clk *pout;
  40
  41 static struct snd_soc_card zylonite;
  42
  43 static const struct snd_soc_dapm_widget zylonite_dapm_widgets[] = {
  44         SND_SOC_DAPM_HP("Headphone", NULL),
  45         SND_SOC_DAPM_MIC("Headset Microphone", NULL),
  46         SND_SOC_DAPM_MIC("Handset Microphone", NULL),
  47         SND_SOC_DAPM_SPK("Multiactor", NULL),
  48         SND_SOC_DAPM_SPK("Headset Earpiece", NULL),
  49 };
  50
  51 /* Currently supported audio map */
  52 static const struct snd_soc_dapm_route audio_map[] = {
  53
  54         /* Headphone output connected to HPL/HPR */
  55         { "Headphone", NULL,  "HPL" },
  56         { "Headphone", NULL,  "HPR" },
  57
  58         /* On-board earpiece */
  59         { "Headset Earpiece", NULL, "OUT3" },
  60
  61         /* Headphone mic */
  62         { "MIC2A", NULL, "Mic Bias" },
  63         { "Mic Bias", NULL, "Headset Microphone" },
  64
  65         /* On-board mic */
  66         { "MIC1", NULL, "Mic Bias" },
  67         { "Mic Bias", NULL, "Handset Microphone" },
  68
  69         /* Multiactor differentially connected over SPKL/SPKR */
  70         { "Multiactor", NULL, "SPKL" },
  71         { "Multiactor", NULL, "SPKR" },
  72 };
  73
  74 static int zylonite_wm9713_init(struct snd_soc_codec *codec)
  75 {
  76         if (clk_pout)
  77                 snd_soc_dai_set_pll(&codec->dai[0], 0, clk_get_rate(pout), 0);
  78
  79         snd_soc_dapm_new_controls(codec, zylonite_dapm_widgets,
  80                                   ARRAY_SIZE(zylonite_dapm_widgets));
  81
  82         snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
  83
  84         /* Static setup for now */
  85         snd_soc_dapm_enable_pin(codec, "Headphone");
  86         snd_soc_dapm_enable_pin(codec, "Headset Earpiece");
  87
  88         snd_soc_dapm_sync(codec);
  89         return 0;
  90 }
  91
  92 static int zylonite_voice_hw_params(struct snd_pcm_substream *substream,
  93                                     struct snd_pcm_hw_params *params)
  94 {
  95         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  96         struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
  97         struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
  98         unsigned int pll_out = 0;
  99         unsigned int wm9713_div = 0;
 100         int ret = 0;
 101         int rate = params_rate(params);
 102         int width = snd_pcm_format_physical_width(params_format(params));
 103
 104         /* Only support ratios that we can generate neatly from the AC97
 105          * based master clock - in particular, this excludes 44.1kHz.
 106          * In most applications the voice DAC will be used for telephony
 107          * data so multiples of 8kHz will be the common case.
 108          */
 109         switch (rate) {
 110         case 8000:
 111                 wm9713_div = 12;
 112                 break;
 113         case 16000:
 114                 wm9713_div = 6;
 115                 break;
 116         case 48000:
 117                 wm9713_div = 2;
 118                 break;
 119         default:
 120                 /* Don't support OSS emulation */
 121                 return -EINVAL;
 122         }
 123
 124         /* Add 1 to the width for the leading clock cycle */
 125         pll_out = rate * (width + 1) * 8;
 126
 127         ret = snd_soc_dai_set_sysclk(cpu_dai, PXA_SSP_CLK_AUDIO, 0, 1);
 128         if (ret < 0)
 129                 return ret;
 130
 131         ret = snd_soc_dai_set_pll(cpu_dai, 0, 0, pll_out);
 132         if (ret < 0)
 133                 return ret;
 134
 135         if (clk_pout)
 136                 ret = snd_soc_dai_set_clkdiv(codec_dai, WM9713_PCMCLK_PLL_DIV,
 137                                              WM9713_PCMDIV(wm9713_div));
 138         else
 139                 ret = snd_soc_dai_set_clkdiv(codec_dai, WM9713_PCMCLK_DIV,
 140                                              WM9713_PCMDIV(wm9713_div));
 141         if (ret < 0)
 142                 return ret;
 143
 144         ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
 145                 SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
 146         if (ret < 0)
 147                 return ret;
 148
 149         ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
 150                 SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
 151         if (ret < 0)
 152                 return ret;
 153
 154         return 0;
 155 }
 156
 157 static struct snd_soc_ops zylonite_voice_ops = {
 158         .hw_params = zylonite_voice_hw_params,
 159 };
 160
 161 static struct snd_soc_dai_link zylonite_dai[] = {
 162 {
 163         .name = "AC97",
 164         .stream_name = "AC97 HiFi",
 165         .cpu_dai = &pxa_ac97_dai[PXA2XX_DAI_AC97_HIFI],
 166         .codec_dai = &wm9713_dai[WM9713_DAI_AC97_HIFI],
 167         .init = zylonite_wm9713_init,
 168 },
 169 {
 170         .name = "AC97 Aux",
 171         .stream_name = "AC97 Aux",
 172         .cpu_dai = &pxa_ac97_dai[PXA2XX_DAI_AC97_AUX],
 173         .codec_dai = &wm9713_dai[WM9713_DAI_AC97_AUX],
 174 },
 175 {
 176         .name = "WM9713 Voice",
 177         .stream_name = "WM9713 Voice",
 178         .cpu_dai = &pxa_ssp_dai[PXA_DAI_SSP3],
 179         .codec_dai = &wm9713_dai[WM9713_DAI_PCM_VOICE],
 180         .ops = &zylonite_voice_ops,
 181 },
 182 };
 183
 184 static int zylonite_probe(struct platform_device *pdev)
 185 {
 186         int ret;
 187
 188         if (clk_pout) {
 189                 pout = clk_get(NULL, "CLK_POUT");
 190                 if (IS_ERR(pout)) {
 191                         dev_err(&pdev->dev, "Unable to obtain CLK_POUT: %ld\n",
 192                                 PTR_ERR(pout));
 193                         return PTR_ERR(pout);
 194                 }
 195
 196                 ret = clk_enable(pout);
 197                 if (ret != 0) {
 198                         dev_err(&pdev->dev, "Unable to enable CLK_POUT: %d\n",
 199                                 ret);
 200                         clk_put(pout);
 201                         return ret;
 202                 }
 203
 204                 dev_dbg(&pdev->dev, "MCLK enabled at %luHz\n",
 205                         clk_get_rate(pout));
 206         }
 207
 208         return 0;
 209 }
 210
 211 static int zylonite_remove(struct platform_device *pdev)
 212 {
 213         if (clk_pout) {
 214                 clk_disable(pout);
 215                 clk_put(pout);
 216         }
 217
 218         return 0;
 219 }
 220
 221 static int zylonite_suspend_post(struct platform_device *pdev,
 222                                  pm_message_t state)
 223 {
 224         if (clk_pout)
 225                 clk_disable(pout);
 226
 227         return 0;
 228 }
 229
 230 static int zylonite_resume_pre(struct platform_device *pdev)
 231 {
 232         int ret = 0;
 233
 234         if (clk_pout) {
 235                 ret = clk_enable(pout);
 236                 if (ret != 0)
 237                         dev_err(&pdev->dev, "Unable to enable CLK_POUT: %d\n",
 238                                 ret);
 239         }
 240
 241         return ret;
 242 }
 243
 244 static struct snd_soc_card zylonite = {
 245         .name = "Zylonite",
 246         .probe = &zylonite_probe,
 247         .remove = &zylonite_remove,
 248         .suspend_post = &zylonite_suspend_post,
 249         .resume_pre = &zylonite_resume_pre,
 250         .platform = &pxa2xx_soc_platform,
 251         .dai_link = zylonite_dai,
 252         .num_links = ARRAY_SIZE(zylonite_dai),
 253 };
 254
 255 static struct snd_soc_device zylonite_snd_ac97_devdata = {
 256         .card = &zylonite,
 257         .codec_dev = &soc_codec_dev_wm9713,
 258 };
 259
 260 static struct platform_device *zylonite_snd_ac97_device;
 261
 262 static int __init zylonite_init(void)
 263 {
 264         int ret;
 265
 266         zylonite_snd_ac97_device = platform_device_alloc("soc-audio", -1);
 267         if (!zylonite_snd_ac97_device)
 268                 return -ENOMEM;
 269
 270         platform_set_drvdata(zylonite_snd_ac97_device,
 271                              &zylonite_snd_ac97_devdata);
 272         zylonite_snd_ac97_devdata.dev = &zylonite_snd_ac97_device->dev;
 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
 281 static void __exit zylonite_exit(void)
 282 {
 283         platform_device_unregister(zylonite_snd_ac97_device);
 284 }
 285
 286 module_init(zylonite_init);
 287 module_exit(zylonite_exit);
 288
 289 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
 290 MODULE_DESCRIPTION("ALSA SoC WM9713 Zylonite");
 291 MODULE_LICENSE("GPL");