release/src-rt-6.x.4708/linux/linux-2.6.36/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, 0,
  78                                     clk_get_rate(pout), 0);
  79
  80         snd_soc_dapm_new_controls(codec, zylonite_dapm_widgets,
  81                                   ARRAY_SIZE(zylonite_dapm_widgets));
  82
  83         snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
  84
  85         /* Static setup for now */
  86         snd_soc_dapm_enable_pin(codec, "Headphone");
  87         snd_soc_dapm_enable_pin(codec, "Headset Earpiece");
  88
  89         snd_soc_dapm_sync(codec);
  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->dai->codec_dai;
  98         struct snd_soc_dai *cpu_dai = rtd->dai->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         .cpu_dai = &pxa_ac97_dai[PXA2XX_DAI_AC97_HIFI],
 167         .codec_dai = &wm9713_dai[WM9713_DAI_AC97_HIFI],
 168         .init = zylonite_wm9713_init,
 169 },
 170 {
 171         .name = "AC97 Aux",
 172         .stream_name = "AC97 Aux",
 173         .cpu_dai = &pxa_ac97_dai[PXA2XX_DAI_AC97_AUX],
 174         .codec_dai = &wm9713_dai[WM9713_DAI_AC97_AUX],
 175 },
 176 {
 177         .name = "WM9713 Voice",
 178         .stream_name = "WM9713 Voice",
 179         .cpu_dai = &pxa_ssp_dai[PXA_DAI_SSP3],
 180         .codec_dai = &wm9713_dai[WM9713_DAI_PCM_VOICE],
 181         .ops = &zylonite_voice_ops,
 182 },
 183 };
 184
 185 static int zylonite_probe(struct platform_device *pdev)
 186 {
 187         int ret;
 188
 189         if (clk_pout) {
 190                 pout = clk_get(NULL, "CLK_POUT");
 191                 if (IS_ERR(pout)) {
 192                         dev_err(&pdev->dev, "Unable to obtain CLK_POUT: %ld\n",
 193                                 PTR_ERR(pout));
 194                         return PTR_ERR(pout);
 195                 }
 196
 197                 ret = clk_enable(pout);
 198                 if (ret != 0) {
 199                         dev_err(&pdev->dev, "Unable to enable CLK_POUT: %d\n",
 200                                 ret);
 201                         clk_put(pout);
 202                         return ret;
 203                 }
 204
 205                 dev_dbg(&pdev->dev, "MCLK enabled at %luHz\n",
 206                         clk_get_rate(pout));
 207         }
 208
 209         return 0;
 210 }
 211
 212 static int zylonite_remove(struct platform_device *pdev)
 213 {
 214         if (clk_pout) {
 215                 clk_disable(pout);
 216                 clk_put(pout);
 217         }
 218
 219         return 0;
 220 }
 221
 222 static int zylonite_suspend_post(struct platform_device *pdev,
 223                                  pm_message_t state)
 224 {
 225         if (clk_pout)
 226                 clk_disable(pout);
 227
 228         return 0;
 229 }
 230
 231 static int zylonite_resume_pre(struct platform_device *pdev)
 232 {
 233         int ret = 0;
 234
 235         if (clk_pout) {
 236                 ret = clk_enable(pout);
 237                 if (ret != 0)
 238                         dev_err(&pdev->dev, "Unable to enable CLK_POUT: %d\n",
 239                                 ret);
 240         }
 241
 242         return ret;
 243 }
 244
 245 static struct snd_soc_card zylonite = {
 246         .name = "Zylonite",
 247         .probe = &zylonite_probe,
 248         .remove = &zylonite_remove,
 249         .suspend_post = &zylonite_suspend_post,
 250         .resume_pre = &zylonite_resume_pre,
 251         .platform = &pxa2xx_soc_platform,
 252         .dai_link = zylonite_dai,
 253         .num_links = ARRAY_SIZE(zylonite_dai),
 254 };
 255
 256 static struct snd_soc_device zylonite_snd_ac97_devdata = {
 257         .card = &zylonite,
 258         .codec_dev = &soc_codec_dev_wm9713,
 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,
 272                              &zylonite_snd_ac97_devdata);
 273         zylonite_snd_ac97_devdata.dev = &zylonite_snd_ac97_device->dev;
 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");