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