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 acds = 0;
  99         unsigned int wm9713_div = 0;
 100         int ret = 0;
 101
 102         switch (params_rate(params)) {
 103         case 8000:
 104                 wm9713_div = 12;
 105                 break;
 106         case 16000:
 107                 wm9713_div = 6;
 108                 break;
 109         case 48000:
 110         default:
 111                 wm9713_div = 2;
 112                 acds = 1;
 113                 break;
 114         }
 115
 116         ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
 117                 SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
 118         if (ret < 0)
 119                 return ret;
 120
 121         ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
 122                 SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
 123         if (ret < 0)
 124                 return ret;
 125
 126         ret = snd_soc_dai_set_tdm_slot(cpu_dai,
 127                                        params_channels(params),
 128                                        params_channels(params));
 129         if (ret < 0)
 130                 return ret;
 131
 132         ret = snd_soc_dai_set_clkdiv(cpu_dai, PXA_SSP_AUDIO_DIV_ACDS, acds);
 133         if (ret < 0)
 134                 return ret;
 135
 136         ret = snd_soc_dai_set_sysclk(cpu_dai, PXA_SSP_CLK_AUDIO, 0, 1);
 137         if (ret < 0)
 138                 return ret;
 139
 140         if (clk_pout)
 141                 ret = snd_soc_dai_set_clkdiv(codec_dai, WM9713_PCMCLK_PLL_DIV,
 142                                              WM9713_PCMDIV(wm9713_div));
 143         else
 144                 ret = snd_soc_dai_set_clkdiv(codec_dai, WM9713_PCMCLK_DIV,
 145                                              WM9713_PCMDIV(wm9713_div));
 146         if (ret < 0)
 147                 return ret;
 148
 149         return 0;
 150 }
 151
 152 static struct snd_soc_ops zylonite_voice_ops = {
 153         .hw_params = zylonite_voice_hw_params,
 154 };
 155
 156 static struct snd_soc_dai_link zylonite_dai[] = {
 157 {
 158         .name = "AC97",
 159         .stream_name = "AC97 HiFi",
 160         .cpu_dai = &pxa_ac97_dai[PXA2XX_DAI_AC97_HIFI],
 161         .codec_dai = &wm9713_dai[WM9713_DAI_AC97_HIFI],
 162         .init = zylonite_wm9713_init,
 163 },
 164 {
 165         .name = "AC97 Aux",
 166         .stream_name = "AC97 Aux",
 167         .cpu_dai = &pxa_ac97_dai[PXA2XX_DAI_AC97_AUX],
 168         .codec_dai = &wm9713_dai[WM9713_DAI_AC97_AUX],
 169 },
 170 {
 171         .name = "WM9713 Voice",
 172         .stream_name = "WM9713 Voice",
 173         .cpu_dai = &pxa_ssp_dai[PXA_DAI_SSP3],
 174         .codec_dai = &wm9713_dai[WM9713_DAI_PCM_VOICE],
 175         .ops = &zylonite_voice_ops,
 176 },
 177 };
 178
 179 static int zylonite_probe(struct platform_device *pdev)
 180 {
 181         int ret;
 182
 183         if (clk_pout) {
 184                 pout = clk_get(NULL, "CLK_POUT");
 185                 if (IS_ERR(pout)) {
 186                         dev_err(&pdev->dev, "Unable to obtain CLK_POUT: %ld\n",
 187                                 PTR_ERR(pout));
 188                         return PTR_ERR(pout);
 189                 }
 190
 191                 ret = clk_enable(pout);
 192                 if (ret != 0) {
 193                         dev_err(&pdev->dev, "Unable to enable CLK_POUT: %d\n",
 194                                 ret);
 195                         clk_put(pout);
 196                         return ret;
 197                 }
 198
 199                 dev_dbg(&pdev->dev, "MCLK enabled at %luHz\n",
 200                         clk_get_rate(pout));
 201         }
 202
 203         return 0;
 204 }
 205
 206 static int zylonite_remove(struct platform_device *pdev)
 207 {
 208         if (clk_pout) {
 209                 clk_disable(pout);
 210                 clk_put(pout);
 211         }
 212
 213         return 0;
 214 }
 215
 216 static int zylonite_suspend_post(struct platform_device *pdev,
 217                                  pm_message_t state)
 218 {
 219         if (clk_pout)
 220                 clk_disable(pout);
 221
 222         return 0;
 223 }
 224
 225 static int zylonite_resume_pre(struct platform_device *pdev)
 226 {
 227         int ret = 0;
 228
 229         if (clk_pout) {
 230                 ret = clk_enable(pout);
 231                 if (ret != 0)
 232                         dev_err(&pdev->dev, "Unable to enable CLK_POUT: %d\n",
 233                                 ret);
 234         }
 235
 236         return ret;
 237 }
 238
 239 static struct snd_soc_card zylonite = {
 240         .name = "Zylonite",
 241         .probe = &zylonite_probe,
 242         .remove = &zylonite_remove,
 243         .suspend_post = &zylonite_suspend_post,
 244         .resume_pre = &zylonite_resume_pre,
 245         .platform = &pxa2xx_soc_platform,
 246         .dai_link = zylonite_dai,
 247         .num_links = ARRAY_SIZE(zylonite_dai),
 248 };
 249
 250 static struct snd_soc_device zylonite_snd_ac97_devdata = {
 251         .card = &zylonite,
 252         .codec_dev = &soc_codec_dev_wm9713,
 253 };
 254
 255 static struct platform_device *zylonite_snd_ac97_device;
 256
 257 static int __init zylonite_init(void)
 258 {
 259         int ret;
 260
 261         zylonite_snd_ac97_device = platform_device_alloc("soc-audio", -1);
 262         if (!zylonite_snd_ac97_device)
 263                 return -ENOMEM;
 264
 265         platform_set_drvdata(zylonite_snd_ac97_device,
 266                              &zylonite_snd_ac97_devdata);
 267         zylonite_snd_ac97_devdata.dev = &zylonite_snd_ac97_device->dev;
 268
 269         ret = platform_device_add(zylonite_snd_ac97_device);
 270         if (ret != 0)
 271                 platform_device_put(zylonite_snd_ac97_device);
 272
 273         return ret;
 274 }
 275
 276 static void __exit zylonite_exit(void)
 277 {
 278         platform_device_unregister(zylonite_snd_ac97_device);
 279 }
 280
 281 module_init(zylonite_init);
 282 module_exit(zylonite_exit);
 283
 284 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
 285 MODULE_DESCRIPTION("ALSA SoC WM9713 Zylonite");
 286 MODULE_LICENSE("GPL");