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         snd_soc_dapm_sync(dapm);
  91         return 0;
  92 }
  93
  94 static 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
 159 static struct snd_soc_ops zylonite_voice_ops = {
 160         .hw_params = zylonite_voice_hw_params,
 161 };
 162
 163 static 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 = "pxa-ac97.0",
 170         .codec_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 = "pxa-ac97.1",
 179         .codec_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_name = "wm9713-voice",
 188         .ops = &zylonite_voice_ops,
 189 },
 190 };
 191
 192 static int zylonite_probe(struct platform_device *pdev)
 193 {
 194         int ret;
 195
 196         if (clk_pout) {
 197                 pout = clk_get(NULL, "CLK_POUT");
 198                 if (IS_ERR(pout)) {
 199                         dev_err(&pdev->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(&pdev->dev, "Unable to enable CLK_POUT: %d\n",
 207                                 ret);
 208                         clk_put(pout);
 209                         return ret;
 210                 }
 211
 212                 dev_dbg(&pdev->dev, "MCLK enabled at %luHz\n",
 213                         clk_get_rate(pout));
 214         }
 215
 216         return 0;
 217 }
 218
 219 static int zylonite_remove(struct platform_device *pdev)
 220 {
 221         if (clk_pout) {
 222                 clk_disable(pout);
 223                 clk_put(pout);
 224         }
 225
 226         return 0;
 227 }
 228
 229 static int zylonite_suspend_post(struct platform_device *pdev,
 230                                  pm_message_t state)
 231 {
 232         if (clk_pout)
 233                 clk_disable(pout);
 234
 235         return 0;
 236 }
 237
 238 static int zylonite_resume_pre(struct platform_device *pdev)
 239 {
 240         int ret = 0;
 241
 242         if (clk_pout) {
 243                 ret = clk_enable(pout);
 244                 if (ret != 0)
 245                         dev_err(&pdev->dev, "Unable to enable CLK_POUT: %d\n",
 246                                 ret);
 247         }
 248
 249         return ret;
 250 }
 251
 252 static struct snd_soc_card zylonite = {
 253         .name = "Zylonite",
 254         .probe = &zylonite_probe,
 255         .remove = &zylonite_remove,
 256         .suspend_post = &zylonite_suspend_post,
 257         .resume_pre = &zylonite_resume_pre,
 258         .dai_link = zylonite_dai,
 259         .num_links = ARRAY_SIZE(zylonite_dai),
 260         .owner = THIS_MODULE,
 261 };
 262
 263 static struct platform_device *zylonite_snd_ac97_device;
 264
 265 static int __init zylonite_init(void)
 266 {
 267         int ret;
 268
 269         zylonite_snd_ac97_device = platform_device_alloc("soc-audio", -1);
 270         if (!zylonite_snd_ac97_device)
 271                 return -ENOMEM;
 272
 273         platform_set_drvdata(zylonite_snd_ac97_device, &zylonite);
 274
 275         ret = platform_device_add(zylonite_snd_ac97_device);
 276         if (ret != 0)
 277                 platform_device_put(zylonite_snd_ac97_device);
 278
 279         return ret;
 280 }
 281
 282 static void __exit zylonite_exit(void)
 283 {
 284         platform_device_unregister(zylonite_snd_ac97_device);
 285 }
 286
 287 module_init(zylonite_init);
 288 module_exit(zylonite_exit);
 289
 290 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
 291 MODULE_DESCRIPTION("ALSA SoC WM9713 Zylonite");
 292 MODULE_LICENSE("GPL");