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 codec DAI configuration */
  69         ret = snd_soc_dai_set_fmt(codec_dai,
  70                         SND_SOC_DAIFMT_MSB | SND_SOC_DAIFMT_NB_NF |
  71                         SND_SOC_DAIFMT_CBS_CFS);
  72         if (ret < 0)
  73                 return ret;
  74
  75         /* set cpu DAI configuration */
  76         ret = snd_soc_dai_set_fmt(cpu_dai,
  77                         SND_SOC_DAIFMT_MSB | SND_SOC_DAIFMT_NB_NF |
  78                         SND_SOC_DAIFMT_CBS_CFS);
  79         if (ret < 0)
  80                 return ret;
  81
  82         /* set the I2S system clock as output */
  83         ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, 0,
  84                         SND_SOC_CLOCK_OUT);
  85         if (ret < 0)
  86                 return ret;
  87
  88         /* inform codec driver about clock freq *
  89          * (PXA I2S always uses divider 256)    */
  90         ret = snd_soc_dai_set_sysclk(codec_dai, 0, 256 * params_rate(params),
  91                         SND_SOC_CLOCK_IN);
  92         if (ret < 0)
  93                 return ret;
  94
  95         return 0;
  96 }
  97
  98 static struct snd_soc_ops hx4700_ops = {
  99         .hw_params = hx4700_hw_params,
 100 };
 101
 102 static int hx4700_spk_power(struct snd_soc_dapm_widget *w,
 103                             struct snd_kcontrol *k, int event)
 104 {
 105         gpio_set_value(GPIO107_HX4700_SPK_nSD, !!SND_SOC_DAPM_EVENT_ON(event));
 106         return 0;
 107 }
 108
 109 static int hx4700_hp_power(struct snd_soc_dapm_widget *w,
 110                            struct snd_kcontrol *k, int event)
 111 {
 112         gpio_set_value(GPIO92_HX4700_HP_DRIVER, !!SND_SOC_DAPM_EVENT_ON(event));
 113         return 0;
 114 }
 115
 116 /* hx4700 machine dapm widgets */
 117 static const struct snd_soc_dapm_widget hx4700_dapm_widgets[] = {
 118         SND_SOC_DAPM_HP("Headphone Jack", hx4700_hp_power),
 119         SND_SOC_DAPM_SPK("Speaker", hx4700_spk_power),
 120         SND_SOC_DAPM_MIC("Built-in Microphone", NULL),
 121 };
 122
 123 /* hx4700 machine audio_map */
 124 static const struct snd_soc_dapm_route hx4700_audio_map[] = {
 125
 126         /* Headphone connected to LOUT, ROUT */
 127         {"Headphone Jack", NULL, "LOUT"},
 128         {"Headphone Jack", NULL, "ROUT"},
 129
 130         /* Speaker connected to MOUT2 */
 131         {"Speaker", NULL, "MOUT2"},
 132
 133         /* Microphone connected to MICIN */
 134         {"MICIN", NULL, "Built-in Microphone"},
 135         {"AIN", NULL, "MICOUT"},
 136 };
 137
 138 /*
 139  * Logic for a ak4641 as connected on a HP iPAQ hx4700
 140  */
 141 static int hx4700_ak4641_init(struct snd_soc_pcm_runtime *rtd)
 142 {
 143         struct snd_soc_codec *codec = rtd->codec;
 144         struct snd_soc_dapm_context *dapm = &codec->dapm;
 145         int err;
 146
 147         /* NC codec pins */
 148         /* FIXME: is anything connected here? */
 149         snd_soc_dapm_nc_pin(dapm, "MOUT1");
 150         snd_soc_dapm_nc_pin(dapm, "MICEXT");
 151         snd_soc_dapm_nc_pin(dapm, "AUX");
 152
 153         /* Jack detection API stuff */
 154         err = snd_soc_jack_new(codec, "Headphone Jack",
 155                                 SND_JACK_HEADPHONE, &hs_jack);
 156         if (err)
 157                 return err;
 158
 159         err = snd_soc_jack_add_pins(&hs_jack, ARRAY_SIZE(hs_jack_pin),
 160                                         hs_jack_pin);
 161         if (err)
 162                 return err;
 163
 164         err = snd_soc_jack_add_gpios(&hs_jack, 1, &hs_jack_gpio);
 165
 166         return err;
 167 }
 168
 169 /* hx4700 digital audio interface glue - connects codec <--> CPU */
 170 static struct snd_soc_dai_link hx4700_dai = {
 171         .name = "ak4641",
 172         .stream_name = "AK4641",
 173         .cpu_dai_name = "pxa2xx-i2s",
 174         .codec_dai_name = "ak4641-hifi",
 175         .platform_name = "pxa-pcm-audio",
 176         .codec_name = "ak4641.0-0012",
 177         .init = hx4700_ak4641_init,
 178         .ops = &hx4700_ops,
 179 };
 180
 181 /* hx4700 audio machine driver */
 182 static struct snd_soc_card snd_soc_card_hx4700 = {
 183         .name                   = "iPAQ hx4700",
 184         .dai_link               = &hx4700_dai,
 185         .num_links              = 1,
 186         .dapm_widgets           = hx4700_dapm_widgets,
 187         .num_dapm_widgets       = ARRAY_SIZE(hx4700_dapm_widgets),
 188         .dapm_routes            = hx4700_audio_map,
 189         .num_dapm_routes        = ARRAY_SIZE(hx4700_audio_map),
 190 };
 191
 192 static struct gpio hx4700_audio_gpios[] = {
 193         { GPIO107_HX4700_SPK_nSD, GPIOF_OUT_INIT_HIGH, "SPK_POWER" },
 194         { GPIO92_HX4700_HP_DRIVER, GPIOF_OUT_INIT_LOW, "EP_POWER" },
 195 };
 196
 197 static int __devinit hx4700_audio_probe(struct platform_device *pdev)
 198 {
 199         int ret;
 200
 201         if (!machine_is_h4700())
 202                 return -ENODEV;
 203
 204         ret = gpio_request_array(hx4700_audio_gpios,
 205                                 ARRAY_SIZE(hx4700_audio_gpios));
 206         if (ret)
 207                 return ret;
 208
 209         snd_soc_card_hx4700.dev = &pdev->dev;
 210         ret = snd_soc_register_card(&snd_soc_card_hx4700);
 211         if (ret)
 212                 return ret;
 213
 214         return 0;
 215 }
 216
 217 static int __devexit hx4700_audio_remove(struct platform_device *pdev)
 218 {
 219         snd_soc_jack_free_gpios(&hs_jack, 1, &hs_jack_gpio);
 220         snd_soc_unregister_card(&snd_soc_card_hx4700);
 221
 222         gpio_set_value(GPIO92_HX4700_HP_DRIVER, 0);
 223         gpio_set_value(GPIO107_HX4700_SPK_nSD, 0);
 224
 225         gpio_free_array(hx4700_audio_gpios, ARRAY_SIZE(hx4700_audio_gpios));
 226         return 0;
 227 }
 228
 229 static struct platform_driver hx4700_audio_driver = {
 230         .driver = {
 231                 .name = "hx4700-audio",
 232                 .owner = THIS_MODULE,
 233                 .pm = &snd_soc_pm_ops,
 234         },
 235         .probe  = hx4700_audio_probe,
 236         .remove = __devexit_p(hx4700_audio_remove),
 237 };
 238
 239 static int __init hx4700_modinit(void)
 240 {
 241         return platform_driver_register(&hx4700_audio_driver);
 242 }
 243 module_init(hx4700_modinit);
 244
 245 static void __exit hx4700_modexit(void)
 246 {
 247         platform_driver_unregister(&hx4700_audio_driver);
 248 }
 249
 250 module_exit(hx4700_modexit);
 251
 252 MODULE_AUTHOR("Philipp Zabel");
 253 MODULE_DESCRIPTION("ALSA SoC iPAQ hx4700");
 254 MODULE_LICENSE("GPL");
 255 MODULE_ALIAS("platform:hx4700-audio");