sound/soc/pxa/hx4700.c

   1 /*
   2  * SoC audio for HP iPAQ hx4700
   3  *
   4  * Copyright (c) 2009 Philipp Zabel
   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;  either version 2 of the  License, or (at your
   9  *  option) any later version.
  10  *
  11  */
  12
  13 #include <linux/module.h>
  14 #include <linux/timer.h>
  15 #include <linux/interrupt.h>
  16 #include <linux/platform_device.h>
  17 #include <linux/delay.h>
  18 #include <linux/gpio.h>
  19
  20 #include <sound/core.h>
  21 #include <sound/jack.h>
  22 #include <sound/pcm.h>
  23 #include <sound/pcm_params.h>
  24 #include <sound/soc.h>
  25
  26 #include <mach/hx4700.h>
  27 #include <asm/mach-types.h>
  28 #include "pxa2xx-i2s.h"
  29
  30 #include "../codecs/ak4641.h"
  31
  32 static struct snd_soc_jack hs_jack;
  33
  34 /* Headphones jack detection DAPM pin */
  35 static struct snd_soc_jack_pin hs_jack_pin[] = {
  36         {
  37                 .pin    = "Headphone Jack",
  38                 .mask   = SND_JACK_HEADPHONE,
  39         },
  40         {
  41                 .pin    = "Speaker",
  42                 /* disable speaker when hp jack is inserted */
  43                 .mask   = SND_JACK_HEADPHONE,
  44                 .invert = 1,
  45         },
  46 };
  47
  48 /* Headphones jack detection GPIO */
  49 static struct snd_soc_jack_gpio hs_jack_gpio = {
  50         .gpio           = GPIO75_HX4700_EARPHONE_nDET,
  51         .invert         = true,
  52         .name           = "hp-gpio",
  53         .report         = SND_JACK_HEADPHONE,
  54         .debounce_time  = 200,
  55 };
  56
  57 /*
  58  * iPAQ hx4700 uses I2S for capture and playback.
  59  */
  60 static int hx4700_hw_params(struct snd_pcm_substream *substream,
  61                             struct snd_pcm_hw_params *params)
  62 {
  63         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  64         struct snd_soc_dai *codec_dai = rtd->codec_dai;
  65         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  66         int ret = 0;
  67
  68         /* set the I2S system clock as output */
  69         ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, 0,
  70                         SND_SOC_CLOCK_OUT);
  71         if (ret < 0)
  72                 return ret;
  73
  74         /* inform codec driver about clock freq *
  75          * (PXA I2S always uses divider 256)    */
  76         ret = snd_soc_dai_set_sysclk(codec_dai, 0, 256 * params_rate(params),
  77                         SND_SOC_CLOCK_IN);
  78         if (ret < 0)
  79                 return ret;
  80
  81         return 0;
  82 }
  83
  84 static struct snd_soc_ops hx4700_ops = {
  85         .hw_params = hx4700_hw_params,
  86 };
  87
  88 static int hx4700_spk_power(struct snd_soc_dapm_widget *w,
  89                             struct snd_kcontrol *k, int event)
  90 {
  91         gpio_set_value(GPIO107_HX4700_SPK_nSD, !!SND_SOC_DAPM_EVENT_ON(event));
  92         return 0;
  93 }
  94
  95 static int hx4700_hp_power(struct snd_soc_dapm_widget *w,
  96                            struct snd_kcontrol *k, int event)
  97 {
  98         gpio_set_value(GPIO92_HX4700_HP_DRIVER, !!SND_SOC_DAPM_EVENT_ON(event));
  99         return 0;
 100 }
 101
 102 /* hx4700 machine dapm widgets */
 103 static const struct snd_soc_dapm_widget hx4700_dapm_widgets[] = {
 104         SND_SOC_DAPM_HP("Headphone Jack", hx4700_hp_power),
 105         SND_SOC_DAPM_SPK("Speaker", hx4700_spk_power),
 106         SND_SOC_DAPM_MIC("Built-in Microphone", NULL),
 107 };
 108
 109 /* hx4700 machine audio_map */
 110 static const struct snd_soc_dapm_route hx4700_audio_map[] = {
 111
 112         /* Headphone connected to LOUT, ROUT */
 113         {"Headphone Jack", NULL, "LOUT"},
 114         {"Headphone Jack", NULL, "ROUT"},
 115
 116         /* Speaker connected to MOUT2 */
 117         {"Speaker", NULL, "MOUT2"},
 118
 119         /* Microphone connected to MICIN */
 120         {"MICIN", NULL, "Built-in Microphone"},
 121         {"AIN", NULL, "MICOUT"},
 122 };
 123
 124 /*
 125  * Logic for a ak4641 as connected on a HP iPAQ hx4700
 126  */
 127 static int hx4700_ak4641_init(struct snd_soc_pcm_runtime *rtd)
 128 {
 129         struct snd_soc_codec *codec = rtd->codec;
 130         struct snd_soc_dapm_context *dapm = &codec->dapm;
 131         int err;
 132
 133         /* NC codec pins */
 134         /* FIXME: is anything connected here? */
 135         snd_soc_dapm_nc_pin(dapm, "MOUT1");
 136         snd_soc_dapm_nc_pin(dapm, "MICEXT");
 137         snd_soc_dapm_nc_pin(dapm, "AUX");
 138
 139         /* Jack detection API stuff */
 140         err = snd_soc_jack_new(codec, "Headphone Jack",
 141                                 SND_JACK_HEADPHONE, &hs_jack);
 142         if (err)
 143                 return err;
 144
 145         err = snd_soc_jack_add_pins(&hs_jack, ARRAY_SIZE(hs_jack_pin),
 146                                         hs_jack_pin);
 147         if (err)
 148                 return err;
 149
 150         err = snd_soc_jack_add_gpios(&hs_jack, 1, &hs_jack_gpio);
 151
 152         return err;
 153 }
 154
 155 /* hx4700 digital audio interface glue - connects codec <--> CPU */
 156 static struct snd_soc_dai_link hx4700_dai = {
 157         .name = "ak4641",
 158         .stream_name = "AK4641",
 159         .cpu_dai_name = "pxa2xx-i2s",
 160         .codec_dai_name = "ak4641-hifi",
 161         .platform_name = "pxa-pcm-audio",
 162         .codec_name = "ak4641.0-0012",
 163         .init = hx4700_ak4641_init,
 164         .dai_fmt = SND_SOC_DAIFMT_MSB | SND_SOC_DAIFMT_NB_NF |
 165                    SND_SOC_DAIFMT_CBS_CFS,
 166         .ops = &hx4700_ops,
 167 };
 168
 169 /* hx4700 audio machine driver */
 170 static struct snd_soc_card snd_soc_card_hx4700 = {
 171         .name                   = "iPAQ hx4700",
 172         .owner                  = THIS_MODULE,
 173         .dai_link               = &hx4700_dai,
 174         .num_links              = 1,
 175         .dapm_widgets           = hx4700_dapm_widgets,
 176         .num_dapm_widgets       = ARRAY_SIZE(hx4700_dapm_widgets),
 177         .dapm_routes            = hx4700_audio_map,
 178         .num_dapm_routes        = ARRAY_SIZE(hx4700_audio_map),
 179 };
 180
 181 static struct gpio hx4700_audio_gpios[] = {
 182         { GPIO107_HX4700_SPK_nSD, GPIOF_OUT_INIT_HIGH, "SPK_POWER" },
 183         { GPIO92_HX4700_HP_DRIVER, GPIOF_OUT_INIT_LOW, "EP_POWER" },
 184 };
 185
 186 static int hx4700_audio_probe(struct platform_device *pdev)
 187 {
 188         int ret;
 189
 190         if (!machine_is_h4700())
 191                 return -ENODEV;
 192
 193         ret = gpio_request_array(hx4700_audio_gpios,
 194                                 ARRAY_SIZE(hx4700_audio_gpios));
 195         if (ret)
 196                 return ret;
 197
 198         snd_soc_card_hx4700.dev = &pdev->dev;
 199         ret = snd_soc_register_card(&snd_soc_card_hx4700);
 200         if (ret)
 201                 gpio_free_array(hx4700_audio_gpios,
 202                                 ARRAY_SIZE(hx4700_audio_gpios));
 203
 204         return ret;
 205 }
 206
 207 static int hx4700_audio_remove(struct platform_device *pdev)
 208 {
 209         snd_soc_jack_free_gpios(&hs_jack, 1, &hs_jack_gpio);
 210         snd_soc_unregister_card(&snd_soc_card_hx4700);
 211
 212         gpio_set_value(GPIO92_HX4700_HP_DRIVER, 0);
 213         gpio_set_value(GPIO107_HX4700_SPK_nSD, 0);
 214
 215         gpio_free_array(hx4700_audio_gpios, ARRAY_SIZE(hx4700_audio_gpios));
 216         return 0;
 217 }
 218
 219 static struct platform_driver hx4700_audio_driver = {
 220         .driver = {
 221                 .name = "hx4700-audio",
 222                 .owner = THIS_MODULE,
 223                 .pm = &snd_soc_pm_ops,
 224         },
 225         .probe  = hx4700_audio_probe,
 226         .remove = hx4700_audio_remove,
 227 };
 228
 229 module_platform_driver(hx4700_audio_driver);
 230
 231 MODULE_AUTHOR("Philipp Zabel");
 232 MODULE_DESCRIPTION("ALSA SoC iPAQ hx4700");
 233 MODULE_LICENSE("GPL");
 234 MODULE_ALIAS("platform:hx4700-audio");