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 static struct snd_soc_jack hs_jack;
  31
  32 /* Headphones jack detection DAPM pin */
  33 static struct snd_soc_jack_pin hs_jack_pin[] = {
  34         {
  35                 .pin    = "Headphone Jack",
  36                 .mask   = SND_JACK_HEADPHONE,
  37         },
  38         {
  39                 .pin    = "Speaker",
  40                 /* disable speaker when hp jack is inserted */
  41                 .mask   = SND_JACK_HEADPHONE,
  42                 .invert = 1,
  43         },
  44 };
  45
  46 /* Headphones jack detection GPIO */
  47 static struct snd_soc_jack_gpio hs_jack_gpio = {
  48         .gpio           = GPIO75_HX4700_EARPHONE_nDET,
  49         .invert         = true,
  50         .name           = "hp-gpio",
  51         .report         = SND_JACK_HEADPHONE,
  52         .debounce_time  = 200,
  53 };
  54
  55 /*
  56  * iPAQ hx4700 uses I2S for capture and playback.
  57  */
  58 static int hx4700_hw_params(struct snd_pcm_substream *substream,
  59                             struct snd_pcm_hw_params *params)
  60 {
  61         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  62         struct snd_soc_dai *codec_dai = rtd->codec_dai;
  63         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  64         int ret = 0;
  65
  66         /* set the I2S system clock as output */
  67         ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, 0,
  68                         SND_SOC_CLOCK_OUT);
  69         if (ret < 0)
  70                 return ret;
  71
  72         /* inform codec driver about clock freq *
  73          * (PXA I2S always uses divider 256)    */
  74         ret = snd_soc_dai_set_sysclk(codec_dai, 0, 256 * params_rate(params),
  75                         SND_SOC_CLOCK_IN);
  76         if (ret < 0)
  77                 return ret;
  78
  79         return 0;
  80 }
  81
  82 static struct snd_soc_ops hx4700_ops = {
  83         .hw_params = hx4700_hw_params,
  84 };
  85
  86 static int hx4700_spk_power(struct snd_soc_dapm_widget *w,
  87                             struct snd_kcontrol *k, int event)
  88 {
  89         gpio_set_value(GPIO107_HX4700_SPK_nSD, !!SND_SOC_DAPM_EVENT_ON(event));
  90         return 0;
  91 }
  92
  93 static int hx4700_hp_power(struct snd_soc_dapm_widget *w,
  94                            struct snd_kcontrol *k, int event)
  95 {
  96         gpio_set_value(GPIO92_HX4700_HP_DRIVER, !!SND_SOC_DAPM_EVENT_ON(event));
  97         return 0;
  98 }
  99
 100 /* hx4700 machine dapm widgets */
 101 static const struct snd_soc_dapm_widget hx4700_dapm_widgets[] = {
 102         SND_SOC_DAPM_HP("Headphone Jack", hx4700_hp_power),
 103         SND_SOC_DAPM_SPK("Speaker", hx4700_spk_power),
 104         SND_SOC_DAPM_MIC("Built-in Microphone", NULL),
 105 };
 106
 107 /* hx4700 machine audio_map */
 108 static const struct snd_soc_dapm_route hx4700_audio_map[] = {
 109
 110         /* Headphone connected to LOUT, ROUT */
 111         {"Headphone Jack", NULL, "LOUT"},
 112         {"Headphone Jack", NULL, "ROUT"},
 113
 114         /* Speaker connected to MOUT2 */
 115         {"Speaker", NULL, "MOUT2"},
 116
 117         /* Microphone connected to MICIN */
 118         {"MICIN", NULL, "Built-in Microphone"},
 119         {"AIN", NULL, "MICOUT"},
 120 };
 121
 122 /*
 123  * Logic for a ak4641 as connected on a HP iPAQ hx4700
 124  */
 125 static int hx4700_ak4641_init(struct snd_soc_pcm_runtime *rtd)
 126 {
 127         int err;
 128
 129         /* Jack detection API stuff */
 130         err = snd_soc_card_jack_new(rtd->card, "Headphone Jack",
 131                                     SND_JACK_HEADPHONE, &hs_jack, hs_jack_pin,
 132                                     ARRAY_SIZE(hs_jack_pin));
 133         if (err)
 134                 return err;
 135
 136         err = snd_soc_jack_add_gpios(&hs_jack, 1, &hs_jack_gpio);
 137
 138         return err;
 139 }
 140
 141 static int hx4700_card_remove(struct snd_soc_card *card)
 142 {
 143         snd_soc_jack_free_gpios(&hs_jack, 1, &hs_jack_gpio);
 144
 145         return 0;
 146 }
 147
 148 /* hx4700 digital audio interface glue - connects codec <--> CPU */
 149 static struct snd_soc_dai_link hx4700_dai = {
 150         .name = "ak4641",
 151         .stream_name = "AK4641",
 152         .cpu_dai_name = "pxa2xx-i2s",
 153         .codec_dai_name = "ak4641-hifi",
 154         .platform_name = "pxa-pcm-audio",
 155         .codec_name = "ak4641.0-0012",
 156         .init = hx4700_ak4641_init,
 157         .dai_fmt = SND_SOC_DAIFMT_MSB | SND_SOC_DAIFMT_NB_NF |
 158                    SND_SOC_DAIFMT_CBS_CFS,
 159         .ops = &hx4700_ops,
 160 };
 161
 162 /* hx4700 audio machine driver */
 163 static struct snd_soc_card snd_soc_card_hx4700 = {
 164         .name                   = "iPAQ hx4700",
 165         .owner                  = THIS_MODULE,
 166         .remove                 = hx4700_card_remove,
 167         .dai_link               = &hx4700_dai,
 168         .num_links              = 1,
 169         .dapm_widgets           = hx4700_dapm_widgets,
 170         .num_dapm_widgets       = ARRAY_SIZE(hx4700_dapm_widgets),
 171         .dapm_routes            = hx4700_audio_map,
 172         .num_dapm_routes        = ARRAY_SIZE(hx4700_audio_map),
 173         .fully_routed           = true,
 174 };
 175
 176 static struct gpio hx4700_audio_gpios[] = {
 177         { GPIO107_HX4700_SPK_nSD, GPIOF_OUT_INIT_HIGH, "SPK_POWER" },
 178         { GPIO92_HX4700_HP_DRIVER, GPIOF_OUT_INIT_LOW, "EP_POWER" },
 179 };
 180
 181 static int hx4700_audio_probe(struct platform_device *pdev)
 182 {
 183         int ret;
 184
 185         if (!machine_is_h4700())
 186                 return -ENODEV;
 187
 188         ret = gpio_request_array(hx4700_audio_gpios,
 189                                 ARRAY_SIZE(hx4700_audio_gpios));
 190         if (ret)
 191                 return ret;
 192
 193         snd_soc_card_hx4700.dev = &pdev->dev;
 194         ret = devm_snd_soc_register_card(&pdev->dev, &snd_soc_card_hx4700);
 195         if (ret)
 196                 gpio_free_array(hx4700_audio_gpios,
 197                                 ARRAY_SIZE(hx4700_audio_gpios));
 198
 199         return ret;
 200 }
 201
 202 static int hx4700_audio_remove(struct platform_device *pdev)
 203 {
 204         gpio_set_value(GPIO92_HX4700_HP_DRIVER, 0);
 205         gpio_set_value(GPIO107_HX4700_SPK_nSD, 0);
 206
 207         gpio_free_array(hx4700_audio_gpios, ARRAY_SIZE(hx4700_audio_gpios));
 208         return 0;
 209 }
 210
 211 static struct platform_driver hx4700_audio_driver = {
 212         .driver = {
 213                 .name = "hx4700-audio",
 214                 .pm = &snd_soc_pm_ops,
 215         },
 216         .probe  = hx4700_audio_probe,
 217         .remove = hx4700_audio_remove,
 218 };
 219
 220 module_platform_driver(hx4700_audio_driver);
 221
 222 MODULE_AUTHOR("Philipp Zabel");
 223 MODULE_DESCRIPTION("ALSA SoC iPAQ hx4700");
 224 MODULE_LICENSE("GPL");
 225 MODULE_ALIAS("platform:hx4700-audio");