sound/soc/pxa/zylonite.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * zylonite.c  --  SoC audio for Zylonite
   4  *
   5  * Copyright 2008 Wolfson Microelectronics PLC.
   6  * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
   7  */
   8
   9 #include <linux/module.h>
  10 #include <linux/moduleparam.h>
  11 #include <linux/device.h>
  12 #include <linux/clk.h>
  13 #include <linux/i2c.h>
  14 #include <sound/core.h>
  15 #include <sound/pcm.h>
  16 #include <sound/pcm_params.h>
  17 #include <sound/soc.h>
  18
  19 #include "../codecs/wm9713.h"
  20 #include "pxa-ssp.h"
  21
  22 /*
  23  * There is a physical switch SW15 on the board which changes the MCLK
  24  * for the WM9713 between the standard AC97 master clock and the
  25  * output of the CLK_POUT signal from the PXA.
  26  */
  27 static int clk_pout;
  28 module_param(clk_pout, int, 0);
  29 MODULE_PARM_DESC(clk_pout, "Use CLK_POUT as WM9713 MCLK (SW15 on board).");
  30
  31 static struct clk *pout;
  32
  33 static struct snd_soc_card zylonite;
  34
  35 static const struct snd_soc_dapm_widget zylonite_dapm_widgets[] = {
  36         SND_SOC_DAPM_HP("Headphone", NULL),
  37         SND_SOC_DAPM_MIC("Headset Microphone", NULL),
  38         SND_SOC_DAPM_MIC("Handset Microphone", NULL),
  39         SND_SOC_DAPM_SPK("Multiactor", NULL),
  40         SND_SOC_DAPM_SPK("Headset Earpiece", NULL),
  41 };
  42
  43 /* Currently supported audio map */
  44 static const struct snd_soc_dapm_route audio_map[] = {
  45
  46         /* Headphone output connected to HPL/HPR */
  47         { "Headphone", NULL,  "HPL" },
  48         { "Headphone", NULL,  "HPR" },
  49
  50         /* On-board earpiece */
  51         { "Headset Earpiece", NULL, "OUT3" },
  52
  53         /* Headphone mic */
  54         { "MIC2A", NULL, "Mic Bias" },
  55         { "Mic Bias", NULL, "Headset Microphone" },
  56
  57         /* On-board mic */
  58         { "MIC1", NULL, "Mic Bias" },
  59         { "Mic Bias", NULL, "Handset Microphone" },
  60
  61         /* Multiactor differentially connected over SPKL/SPKR */
  62         { "Multiactor", NULL, "SPKL" },
  63         { "Multiactor", NULL, "SPKR" },
  64 };
  65
  66 static int zylonite_wm9713_init(struct snd_soc_pcm_runtime *rtd)
  67 {
  68         if (clk_pout)
  69                 snd_soc_dai_set_pll(rtd->codec_dai, 0, 0,
  70                                     clk_get_rate(pout), 0);
  71
  72         return 0;
  73 }
  74
  75 static int zylonite_voice_hw_params(struct snd_pcm_substream *substream,
  76                                     struct snd_pcm_hw_params *params)
  77 {
  78         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  79         struct snd_soc_dai *codec_dai = rtd->codec_dai;
  80         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  81         unsigned int wm9713_div = 0;
  82         int ret = 0;
  83         int rate = params_rate(params);
  84
  85         /* Only support ratios that we can generate neatly from the AC97
  86          * based master clock - in particular, this excludes 44.1kHz.
  87          * In most applications the voice DAC will be used for telephony
  88          * data so multiples of 8kHz will be the common case.
  89          */
  90         switch (rate) {
  91         case 8000:
  92                 wm9713_div = 12;
  93                 break;
  94         case 16000:
  95                 wm9713_div = 6;
  96                 break;
  97         case 48000:
  98                 wm9713_div = 2;
  99                 break;
 100         default:
 101                 /* Don't support OSS emulation */
 102                 return -EINVAL;
 103         }
 104
 105         ret = snd_soc_dai_set_sysclk(cpu_dai, PXA_SSP_CLK_AUDIO, 0, 1);
 106         if (ret < 0)
 107                 return ret;
 108
 109         if (clk_pout)
 110                 ret = snd_soc_dai_set_clkdiv(codec_dai, WM9713_PCMCLK_PLL_DIV,
 111                                              WM9713_PCMDIV(wm9713_div));
 112         else
 113                 ret = snd_soc_dai_set_clkdiv(codec_dai, WM9713_PCMCLK_DIV,
 114                                              WM9713_PCMDIV(wm9713_div));
 115         if (ret < 0)
 116                 return ret;
 117
 118         return 0;
 119 }
 120
 121 static const struct snd_soc_ops zylonite_voice_ops = {
 122         .hw_params = zylonite_voice_hw_params,
 123 };
 124
 125 static struct snd_soc_dai_link zylonite_dai[] = {
 126 {
 127         .name = "AC97",
 128         .stream_name = "AC97 HiFi",
 129         .codec_name = "wm9713-codec",
 130         .platform_name = "pxa-pcm-audio",
 131         .cpu_dai_name = "pxa2xx-ac97",
 132         .codec_dai_name = "wm9713-hifi",
 133         .init = zylonite_wm9713_init,
 134 },
 135 {
 136         .name = "AC97 Aux",
 137         .stream_name = "AC97 Aux",
 138         .codec_name = "wm9713-codec",
 139         .platform_name = "pxa-pcm-audio",
 140         .cpu_dai_name = "pxa2xx-ac97-aux",
 141         .codec_dai_name = "wm9713-aux",
 142 },
 143 {
 144         .name = "WM9713 Voice",
 145         .stream_name = "WM9713 Voice",
 146         .codec_name = "wm9713-codec",
 147         .platform_name = "pxa-pcm-audio",
 148         .cpu_dai_name = "pxa-ssp-dai.2",
 149         .codec_dai_name = "wm9713-voice",
 150         .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
 151                    SND_SOC_DAIFMT_CBS_CFS,
 152         .ops = &zylonite_voice_ops,
 153 },
 154 };
 155
 156 static int zylonite_probe(struct snd_soc_card *card)
 157 {
 158         int ret;
 159
 160         if (clk_pout) {
 161                 pout = clk_get(NULL, "CLK_POUT");
 162                 if (IS_ERR(pout)) {
 163                         dev_err(card->dev, "Unable to obtain CLK_POUT: %ld\n",
 164                                 PTR_ERR(pout));
 165                         return PTR_ERR(pout);
 166                 }
 167
 168                 ret = clk_enable(pout);
 169                 if (ret != 0) {
 170                         dev_err(card->dev, "Unable to enable CLK_POUT: %d\n",
 171                                 ret);
 172                         clk_put(pout);
 173                         return ret;
 174                 }
 175
 176                 dev_dbg(card->dev, "MCLK enabled at %luHz\n",
 177                         clk_get_rate(pout));
 178         }
 179
 180         return 0;
 181 }
 182
 183 static int zylonite_remove(struct snd_soc_card *card)
 184 {
 185         if (clk_pout) {
 186                 clk_disable(pout);
 187                 clk_put(pout);
 188         }
 189
 190         return 0;
 191 }
 192
 193 static int zylonite_suspend_post(struct snd_soc_card *card)
 194 {
 195         if (clk_pout)
 196                 clk_disable(pout);
 197
 198         return 0;
 199 }
 200
 201 static int zylonite_resume_pre(struct snd_soc_card *card)
 202 {
 203         int ret = 0;
 204
 205         if (clk_pout) {
 206                 ret = clk_enable(pout);
 207                 if (ret != 0)
 208                         dev_err(card->dev, "Unable to enable CLK_POUT: %d\n",
 209                                 ret);
 210         }
 211
 212         return ret;
 213 }
 214
 215 static struct snd_soc_card zylonite = {
 216         .name = "Zylonite",
 217         .owner = THIS_MODULE,
 218         .probe = &zylonite_probe,
 219         .remove = &zylonite_remove,
 220         .suspend_post = &zylonite_suspend_post,
 221         .resume_pre = &zylonite_resume_pre,
 222         .dai_link = zylonite_dai,
 223         .num_links = ARRAY_SIZE(zylonite_dai),
 224
 225         .dapm_widgets = zylonite_dapm_widgets,
 226         .num_dapm_widgets = ARRAY_SIZE(zylonite_dapm_widgets),
 227         .dapm_routes = audio_map,
 228         .num_dapm_routes = ARRAY_SIZE(audio_map),
 229 };
 230
 231 static struct platform_device *zylonite_snd_ac97_device;
 232
 233 static int __init zylonite_init(void)
 234 {
 235         int ret;
 236
 237         zylonite_snd_ac97_device = platform_device_alloc("soc-audio", -1);
 238         if (!zylonite_snd_ac97_device)
 239                 return -ENOMEM;
 240
 241         platform_set_drvdata(zylonite_snd_ac97_device, &zylonite);
 242
 243         ret = platform_device_add(zylonite_snd_ac97_device);
 244         if (ret != 0)
 245                 platform_device_put(zylonite_snd_ac97_device);
 246
 247         return ret;
 248 }
 249
 250 static void __exit zylonite_exit(void)
 251 {
 252         platform_device_unregister(zylonite_snd_ac97_device);
 253 }
 254
 255 module_init(zylonite_init);
 256 module_exit(zylonite_exit);
 257
 258 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
 259 MODULE_DESCRIPTION("ALSA SoC WM9713 Zylonite");
 260 MODULE_LICENSE("GPL");