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 acds = 0;
 100         unsigned int wm9713_div = 0;
 101         int ret = 0;
 102
 103         switch (params_rate(params)) {
 104         case 8000:
 105                 wm9713_div = 12;
 106                 pll_out = 2048000;
 107                 break;
 108         case 16000:
 109                 wm9713_div = 6;
 110                 pll_out = 4096000;
 111                 break;
 112         case 48000:
 113         default:
 114                 wm9713_div = 2;
 115                 pll_out = 12288000;
 116                 acds = 1;
 117                 break;
 118         }
 119
 120         ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
 121                 SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
 122         if (ret < 0)
 123                 return ret;
 124
 125         ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
 126                 SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
 127         if (ret < 0)
 128                 return ret;
 129
 130         /* Use network mode for stereo, one slot per channel. */
 131         if (params_channels(params) > 1)
 132                 ret = snd_soc_dai_set_tdm_slot(cpu_dai, 0x3, 2);
 133         else
 134                 ret = snd_soc_dai_set_tdm_slot(cpu_dai, 1, 1);
 135         if (ret < 0)
 136                 return ret;
 137
 138         ret = snd_soc_dai_set_pll(cpu_dai, 0, 0, pll_out);
 139         if (ret < 0)
 140                 return ret;
 141
 142         ret = snd_soc_dai_set_clkdiv(cpu_dai, PXA_SSP_AUDIO_DIV_ACDS, acds);
 143         if (ret < 0)
 144                 return ret;
 145
 146         ret = snd_soc_dai_set_sysclk(cpu_dai, PXA_SSP_CLK_AUDIO, 0, 1);
 147         if (ret < 0)
 148                 return ret;
 149
 150         if (clk_pout)
 151                 ret = snd_soc_dai_set_clkdiv(codec_dai, WM9713_PCMCLK_PLL_DIV,
 152                                              WM9713_PCMDIV(wm9713_div));
 153         else
 154                 ret = snd_soc_dai_set_clkdiv(codec_dai, WM9713_PCMCLK_DIV,
 155                                              WM9713_PCMDIV(wm9713_div));
 156         if (ret < 0)
 157                 return ret;
 158
 159         return 0;
 160 }
 161
 162 static struct snd_soc_ops zylonite_voice_ops = {
 163         .hw_params = zylonite_voice_hw_params,
 164 };
 165
 166 static struct snd_soc_dai_link zylonite_dai[] = {
 167 {
 168         .name = "AC97",
 169         .stream_name = "AC97 HiFi",
 170         .cpu_dai = &pxa_ac97_dai[PXA2XX_DAI_AC97_HIFI],
 171         .codec_dai = &wm9713_dai[WM9713_DAI_AC97_HIFI],
 172         .init = zylonite_wm9713_init,
 173 },
 174 {
 175         .name = "AC97 Aux",
 176         .stream_name = "AC97 Aux",
 177         .cpu_dai = &pxa_ac97_dai[PXA2XX_DAI_AC97_AUX],
 178         .codec_dai = &wm9713_dai[WM9713_DAI_AC97_AUX],
 179 },
 180 {
 181         .name = "WM9713 Voice",
 182         .stream_name = "WM9713 Voice",
 183         .cpu_dai = &pxa_ssp_dai[PXA_DAI_SSP3],
 184         .codec_dai = &wm9713_dai[WM9713_DAI_PCM_VOICE],
 185         .ops = &zylonite_voice_ops,
 186 },
 187 };
 188
 189 static int zylonite_probe(struct platform_device *pdev)
 190 {
 191         int ret;
 192
 193         if (clk_pout) {
 194                 pout = clk_get(NULL, "CLK_POUT");
 195                 if (IS_ERR(pout)) {
 196                         dev_err(&pdev->dev, "Unable to obtain CLK_POUT: %ld\n",
 197                                 PTR_ERR(pout));
 198                         return PTR_ERR(pout);
 199                 }
 200
 201                 ret = clk_enable(pout);
 202                 if (ret != 0) {
 203                         dev_err(&pdev->dev, "Unable to enable CLK_POUT: %d\n",
 204                                 ret);
 205                         clk_put(pout);
 206                         return ret;
 207                 }
 208
 209                 dev_dbg(&pdev->dev, "MCLK enabled at %luHz\n",
 210                         clk_get_rate(pout));
 211         }
 212
 213         return 0;
 214 }
 215
 216 static int zylonite_remove(struct platform_device *pdev)
 217 {
 218         if (clk_pout) {
 219                 clk_disable(pout);
 220                 clk_put(pout);
 221         }
 222
 223         return 0;
 224 }
 225
 226 static int zylonite_suspend_post(struct platform_device *pdev,
 227                                  pm_message_t state)
 228 {
 229         if (clk_pout)
 230                 clk_disable(pout);
 231
 232         return 0;
 233 }
 234
 235 static int zylonite_resume_pre(struct platform_device *pdev)
 236 {
 237         int ret = 0;
 238
 239         if (clk_pout) {
 240                 ret = clk_enable(pout);
 241                 if (ret != 0)
 242                         dev_err(&pdev->dev, "Unable to enable CLK_POUT: %d\n",
 243                                 ret);
 244         }
 245
 246         return ret;
 247 }
 248
 249 static struct snd_soc_card zylonite = {
 250         .name = "Zylonite",
 251         .probe = &zylonite_probe,
 252         .remove = &zylonite_remove,
 253         .suspend_post = &zylonite_suspend_post,
 254         .resume_pre = &zylonite_resume_pre,
 255         .platform = &pxa2xx_soc_platform,
 256         .dai_link = zylonite_dai,
 257         .num_links = ARRAY_SIZE(zylonite_dai),
 258 };
 259
 260 static struct snd_soc_device zylonite_snd_ac97_devdata = {
 261         .card = &zylonite,
 262         .codec_dev = &soc_codec_dev_wm9713,
 263 };
 264
 265 static struct platform_device *zylonite_snd_ac97_device;
 266
 267 static int __init zylonite_init(void)
 268 {
 269         int ret;
 270
 271         zylonite_snd_ac97_device = platform_device_alloc("soc-audio", -1);
 272         if (!zylonite_snd_ac97_device)
 273                 return -ENOMEM;
 274
 275         platform_set_drvdata(zylonite_snd_ac97_device,
 276                              &zylonite_snd_ac97_devdata);
 277         zylonite_snd_ac97_devdata.dev = &zylonite_snd_ac97_device->dev;
 278
 279         ret = platform_device_add(zylonite_snd_ac97_device);
 280         if (ret != 0)
 281                 platform_device_put(zylonite_snd_ac97_device);
 282
 283         return ret;
 284 }
 285
 286 static void __exit zylonite_exit(void)
 287 {
 288         platform_device_unregister(zylonite_snd_ac97_device);
 289 }
 290
 291 module_init(zylonite_init);
 292 module_exit(zylonite_exit);
 293
 294 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
 295 MODULE_DESCRIPTION("ALSA SoC WM9713 Zylonite");
 296 MODULE_LICENSE("GPL");