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  */
  33 static int clk_pout;
  34 module_param(clk_pout, int, 0);
  35 MODULE_PARM_DESC(clk_pout, "Use CLK_POUT as WM9713 MCLK (SW15 on board).");
  36
  37 static struct clk *pout;
  38
  39 static struct snd_soc_card zylonite;
  40
  41 static 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 */
  50 static 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
  72 static 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         return 0;
  91 }
  92
  93 static int zylonite_voice_hw_params(struct snd_pcm_substream *substream,
  94                                     struct snd_pcm_hw_params *params)
  95 {
  96         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  97         struct snd_soc_dai *codec_dai = rtd->codec_dai;
  98         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  99         unsigned int pll_out = 0;
 100         unsigned int wm9713_div = 0;
 101         int ret = 0;
 102         int rate = params_rate(params);
 103         int width = snd_pcm_format_physical_width(params_format(params));
 104
 105         /* Only support ratios that we can generate neatly from the AC97
 106          * based master clock - in particular, this excludes 44.1kHz.
 107          * In most applications the voice DAC will be used for telephony
 108          * data so multiples of 8kHz will be the common case.
 109          */
 110         switch (rate) {
 111         case 8000:
 112                 wm9713_div = 12;
 113                 break;
 114         case 16000:
 115                 wm9713_div = 6;
 116                 break;
 117         case 48000:
 118                 wm9713_div = 2;
 119                 break;
 120         default:
 121                 /* Don't support OSS emulation */
 122                 return -EINVAL;
 123         }
 124
 125         /* Add 1 to the width for the leading clock cycle */
 126         pll_out = rate * (width + 1) * 8;
 127
 128         ret = snd_soc_dai_set_sysclk(cpu_dai, PXA_SSP_CLK_AUDIO, 0, 1);
 129         if (ret < 0)
 130                 return ret;
 131
 132         ret = snd_soc_dai_set_pll(cpu_dai, 0, 0, 0, pll_out);
 133         if (ret < 0)
 134                 return ret;
 135
 136         if (clk_pout)
 137                 ret = snd_soc_dai_set_clkdiv(codec_dai, WM9713_PCMCLK_PLL_DIV,
 138                                              WM9713_PCMDIV(wm9713_div));
 139         else
 140                 ret = snd_soc_dai_set_clkdiv(codec_dai, WM9713_PCMCLK_DIV,
 141                                              WM9713_PCMDIV(wm9713_div));
 142         if (ret < 0)
 143                 return ret;
 144
 145         ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
 146                 SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
 147         if (ret < 0)
 148                 return ret;
 149
 150         ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
 151                 SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
 152         if (ret < 0)
 153                 return ret;
 154
 155         return 0;
 156 }
 157
 158 static struct snd_soc_ops zylonite_voice_ops = {
 159         .hw_params = zylonite_voice_hw_params,
 160 };
 161
 162 static struct snd_soc_dai_link zylonite_dai[] = {
 163 {
 164         .name = "AC97",
 165         .stream_name = "AC97 HiFi",
 166         .codec_name = "wm9713-codec",
 167         .platform_name = "pxa-pcm-audio",
 168         .cpu_dai_name = "pxa2xx-ac97",
 169         .codec_dai_name = "wm9713-hifi",
 170         .init = zylonite_wm9713_init,
 171 },
 172 {
 173         .name = "AC97 Aux",
 174         .stream_name = "AC97 Aux",
 175         .codec_name = "wm9713-codec",
 176         .platform_name = "pxa-pcm-audio",
 177         .cpu_dai_name = "pxa2xx-ac97-aux",
 178         .codec_dai_name = "wm9713-aux",
 179 },
 180 {
 181         .name = "WM9713 Voice",
 182         .stream_name = "WM9713 Voice",
 183         .codec_name = "wm9713-codec",
 184         .platform_name = "pxa-pcm-audio",
 185         .cpu_dai_name = "pxa-ssp-dai.2",
 186         .codec_dai_name = "wm9713-voice",
 187         .ops = &zylonite_voice_ops,
 188 },
 189 };
 190
 191 static int zylonite_probe(struct snd_soc_card *card)
 192 {
 193         int ret;
 194
 195         if (clk_pout) {
 196                 pout = clk_get(NULL, "CLK_POUT");
 197                 if (IS_ERR(pout)) {
 198                         dev_err(card->dev, "Unable to obtain CLK_POUT: %ld\n",
 199                                 PTR_ERR(pout));
 200                         return PTR_ERR(pout);
 201                 }
 202
 203                 ret = clk_enable(pout);
 204                 if (ret != 0) {
 205                         dev_err(card->dev, "Unable to enable CLK_POUT: %d\n",
 206                                 ret);
 207                         clk_put(pout);
 208                         return ret;
 209                 }
 210
 211                 dev_dbg(card->dev, "MCLK enabled at %luHz\n",
 212                         clk_get_rate(pout));
 213         }
 214
 215         return 0;
 216 }
 217
 218 static int zylonite_remove(struct snd_soc_card *card)
 219 {
 220         if (clk_pout) {
 221                 clk_disable(pout);
 222                 clk_put(pout);
 223         }
 224
 225         return 0;
 226 }
 227
 228 static int zylonite_suspend_post(struct snd_soc_card *card)
 229 {
 230         if (clk_pout)
 231                 clk_disable(pout);
 232
 233         return 0;
 234 }
 235
 236 static int zylonite_resume_pre(struct snd_soc_card *card)
 237 {
 238         int ret = 0;
 239
 240         if (clk_pout) {
 241                 ret = clk_enable(pout);
 242                 if (ret != 0)
 243                         dev_err(card->dev, "Unable to enable CLK_POUT: %d\n",
 244                                 ret);
 245         }
 246
 247         return ret;
 248 }
 249
 250 static struct snd_soc_card zylonite = {
 251         .name = "Zylonite",
 252         .owner = THIS_MODULE,
 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 };
 260
 261 static struct platform_device *zylonite_snd_ac97_device;
 262
 263 static int __init zylonite_init(void)
 264 {
 265         int ret;
 266
 267         zylonite_snd_ac97_device = platform_device_alloc("soc-audio", -1);
 268         if (!zylonite_snd_ac97_device)
 269                 return -ENOMEM;
 270
 271         platform_set_drvdata(zylonite_snd_ac97_device, &zylonite);
 272
 273         ret = platform_device_add(zylonite_snd_ac97_device);
 274         if (ret != 0)
 275                 platform_device_put(zylonite_snd_ac97_device);
 276
 277         return ret;
 278 }
 279
 280 static void __exit zylonite_exit(void)
 281 {
 282         platform_device_unregister(zylonite_snd_ac97_device);
 283 }
 284
 285 module_init(zylonite_init);
 286 module_exit(zylonite_exit);
 287
 288 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
 289 MODULE_DESCRIPTION("ALSA SoC WM9713 Zylonite");
 290 MODULE_LICENSE("GPL");