sound/soc/pxa/e740_wm9705.c

   1 /*
   2  * e740-wm9705.c  --  SoC audio for e740
   3  *
   4  * Copyright 2007 (c) Ian Molton <spyro@f2s.com>
   5  *
   6  *  This program is free software; you can redistribute  it and/or modify it
   7  *  under  the terms of  the GNU General  Public License as published by the
   8  *  Free Software Foundation; version 2 ONLY.
   9  *
  10  */
  11
  12 #include <linux/module.h>
  13 #include <linux/moduleparam.h>
  14 #include <linux/gpio.h>
  15
  16 #include <sound/core.h>
  17 #include <sound/pcm.h>
  18 #include <sound/soc.h>
  19
  20 #include <mach/audio.h>
  21 #include <mach/eseries-gpio.h>
  22
  23 #include <asm/mach-types.h>
  24
  25 #include "pxa2xx-ac97.h"
  26
  27
  28 #define E740_AUDIO_OUT 1
  29 #define E740_AUDIO_IN  2
  30
  31 static int e740_audio_power;
  32
  33 static void e740_sync_audio_power(int status)
  34 {
  35         gpio_set_value(GPIO_E740_WM9705_nAVDD2, !status);
  36         gpio_set_value(GPIO_E740_AMP_ON, (status & E740_AUDIO_OUT) ? 1 : 0);
  37         gpio_set_value(GPIO_E740_MIC_ON, (status & E740_AUDIO_IN) ? 1 : 0);
  38 }
  39
  40 static int e740_mic_amp_event(struct snd_soc_dapm_widget *w,
  41                                 struct snd_kcontrol *kcontrol, int event)
  42 {
  43         if (event & SND_SOC_DAPM_PRE_PMU)
  44                 e740_audio_power |= E740_AUDIO_IN;
  45         else if (event & SND_SOC_DAPM_POST_PMD)
  46                 e740_audio_power &= ~E740_AUDIO_IN;
  47
  48         e740_sync_audio_power(e740_audio_power);
  49
  50         return 0;
  51 }
  52
  53 static int e740_output_amp_event(struct snd_soc_dapm_widget *w,
  54                                 struct snd_kcontrol *kcontrol, int event)
  55 {
  56         if (event & SND_SOC_DAPM_PRE_PMU)
  57                 e740_audio_power |= E740_AUDIO_OUT;
  58         else if (event & SND_SOC_DAPM_POST_PMD)
  59                 e740_audio_power &= ~E740_AUDIO_OUT;
  60
  61         e740_sync_audio_power(e740_audio_power);
  62
  63         return 0;
  64 }
  65
  66 static const struct snd_soc_dapm_widget e740_dapm_widgets[] = {
  67         SND_SOC_DAPM_HP("Headphone Jack", NULL),
  68         SND_SOC_DAPM_SPK("Speaker", NULL),
  69         SND_SOC_DAPM_MIC("Mic (Internal)", NULL),
  70         SND_SOC_DAPM_PGA_E("Output Amp", SND_SOC_NOPM, 0, 0, NULL, 0,
  71                         e740_output_amp_event, SND_SOC_DAPM_PRE_PMU |
  72                         SND_SOC_DAPM_POST_PMD),
  73         SND_SOC_DAPM_PGA_E("Mic Amp", SND_SOC_NOPM, 0, 0, NULL, 0,
  74                         e740_mic_amp_event, SND_SOC_DAPM_PRE_PMU |
  75                         SND_SOC_DAPM_POST_PMD),
  76 };
  77
  78 static const struct snd_soc_dapm_route audio_map[] = {
  79         {"Output Amp", NULL, "LOUT"},
  80         {"Output Amp", NULL, "ROUT"},
  81         {"Output Amp", NULL, "MONOOUT"},
  82
  83         {"Speaker", NULL, "Output Amp"},
  84         {"Headphone Jack", NULL, "Output Amp"},
  85
  86         {"MIC1", NULL, "Mic Amp"},
  87         {"Mic Amp", NULL, "Mic (Internal)"},
  88 };
  89
  90 static struct snd_soc_dai_link e740_dai[] = {
  91         {
  92                 .name = "AC97",
  93                 .stream_name = "AC97 HiFi",
  94                 .cpu_dai_name = "pxa2xx-ac97",
  95                 .codec_dai_name = "wm9705-hifi",
  96                 .platform_name = "pxa-pcm-audio",
  97                 .codec_name = "wm9705-codec",
  98         },
  99         {
 100                 .name = "AC97 Aux",
 101                 .stream_name = "AC97 Aux",
 102                 .cpu_dai_name = "pxa2xx-ac97-aux",
 103                 .codec_dai_name = "wm9705-aux",
 104                 .platform_name = "pxa-pcm-audio",
 105                 .codec_name = "wm9705-codec",
 106         },
 107 };
 108
 109 static struct snd_soc_card e740 = {
 110         .name = "Toshiba e740",
 111         .owner = THIS_MODULE,
 112         .dai_link = e740_dai,
 113         .num_links = ARRAY_SIZE(e740_dai),
 114
 115         .dapm_widgets = e740_dapm_widgets,
 116         .num_dapm_widgets = ARRAY_SIZE(e740_dapm_widgets),
 117         .dapm_routes = audio_map,
 118         .num_dapm_routes = ARRAY_SIZE(audio_map),
 119         .fully_routed = true,
 120 };
 121
 122 static struct gpio e740_audio_gpios[] = {
 123         { GPIO_E740_MIC_ON, GPIOF_OUT_INIT_LOW, "Mic amp" },
 124         { GPIO_E740_AMP_ON, GPIOF_OUT_INIT_LOW, "Output amp" },
 125         { GPIO_E740_WM9705_nAVDD2, GPIOF_OUT_INIT_HIGH, "Audio power" },
 126 };
 127
 128 static int e740_probe(struct platform_device *pdev)
 129 {
 130         struct snd_soc_card *card = &e740;
 131         int ret;
 132
 133         ret = gpio_request_array(e740_audio_gpios,
 134                                  ARRAY_SIZE(e740_audio_gpios));
 135         if (ret)
 136                 return ret;
 137
 138         card->dev = &pdev->dev;
 139
 140         ret = devm_snd_soc_register_card(&pdev->dev, card);
 141         if (ret) {
 142                 dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
 143                         ret);
 144                 gpio_free_array(e740_audio_gpios, ARRAY_SIZE(e740_audio_gpios));
 145         }
 146         return ret;
 147 }
 148
 149 static int e740_remove(struct platform_device *pdev)
 150 {
 151         gpio_free_array(e740_audio_gpios, ARRAY_SIZE(e740_audio_gpios));
 152         return 0;
 153 }
 154
 155 static struct platform_driver e740_driver = {
 156         .driver         = {
 157                 .name   = "e740-audio",
 158                 .pm     = &snd_soc_pm_ops,
 159         },
 160         .probe          = e740_probe,
 161         .remove         = e740_remove,
 162 };
 163
 164 module_platform_driver(e740_driver);
 165
 166 /* Module information */
 167 MODULE_AUTHOR("Ian Molton <spyro@f2s.com>");
 168 MODULE_DESCRIPTION("ALSA SoC driver for e740");
 169 MODULE_LICENSE("GPL v2");
 170 MODULE_ALIAS("platform:e740-audio");