sound/soc/pxa/hx4700.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * SoC audio for HP iPAQ hx4700
   4  *
   5  * Copyright (c) 2009 Philipp Zabel
   6  */
   7
   8 #include <linux/module.h>
   9 #include <linux/timer.h>
  10 #include <linux/interrupt.h>
  11 #include <linux/platform_device.h>
  12 #include <linux/delay.h>
  13 #include <linux/gpio.h>
  14
  15 #include <sound/core.h>
  16 #include <sound/jack.h>
  17 #include <sound/pcm.h>
  18 #include <sound/pcm_params.h>
  19 #include <sound/soc.h>
  20
  21 #include <mach/hx4700.h>
  22 #include <asm/mach-types.h>
  23 #include "pxa2xx-i2s.h"
  24
  25 static struct snd_soc_jack hs_jack;
  26
  27 /* Headphones jack detection DAPM pin */
  28 static struct snd_soc_jack_pin hs_jack_pin[] = {
  29         {
  30                 .pin    = "Headphone Jack",
  31                 .mask   = SND_JACK_HEADPHONE,
  32         },
  33         {
  34                 .pin    = "Speaker",
  35                 /* disable speaker when hp jack is inserted */
  36                 .mask   = SND_JACK_HEADPHONE,
  37                 .invert = 1,
  38         },
  39 };
  40
  41 /* Headphones jack detection GPIO */
  42 static struct snd_soc_jack_gpio hs_jack_gpio = {
  43         .gpio           = GPIO75_HX4700_EARPHONE_nDET,
  44         .invert         = true,
  45         .name           = "hp-gpio",
  46         .report         = SND_JACK_HEADPHONE,
  47         .debounce_time  = 200,
  48 };
  49
  50 /*
  51  * iPAQ hx4700 uses I2S for capture and playback.
  52  */
  53 static int hx4700_hw_params(struct snd_pcm_substream *substream,
  54                             struct snd_pcm_hw_params *params)
  55 {
  56         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  57         struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
  58         struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
  59         int ret = 0;
  60
  61         /* set the I2S system clock as output */
  62         ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, 0,
  63                         SND_SOC_CLOCK_OUT);
  64         if (ret < 0)
  65                 return ret;
  66
  67         /* inform codec driver about clock freq *
  68          * (PXA I2S always uses divider 256)    */
  69         ret = snd_soc_dai_set_sysclk(codec_dai, 0, 256 * params_rate(params),
  70                         SND_SOC_CLOCK_IN);
  71         if (ret < 0)
  72                 return ret;
  73
  74         return 0;
  75 }
  76
  77 static const struct snd_soc_ops hx4700_ops = {
  78         .hw_params = hx4700_hw_params,
  79 };
  80
  81 static int hx4700_spk_power(struct snd_soc_dapm_widget *w,
  82                             struct snd_kcontrol *k, int event)
  83 {
  84         gpio_set_value(GPIO107_HX4700_SPK_nSD, !!SND_SOC_DAPM_EVENT_ON(event));
  85         return 0;
  86 }
  87
  88 static int hx4700_hp_power(struct snd_soc_dapm_widget *w,
  89                            struct snd_kcontrol *k, int event)
  90 {
  91         gpio_set_value(GPIO92_HX4700_HP_DRIVER, !!SND_SOC_DAPM_EVENT_ON(event));
  92         return 0;
  93 }
  94
  95 /* hx4700 machine dapm widgets */
  96 static const struct snd_soc_dapm_widget hx4700_dapm_widgets[] = {
  97         SND_SOC_DAPM_HP("Headphone Jack", hx4700_hp_power),
  98         SND_SOC_DAPM_SPK("Speaker", hx4700_spk_power),
  99         SND_SOC_DAPM_MIC("Built-in Microphone", NULL),
 100 };
 101
 102 /* hx4700 machine audio_map */
 103 static const struct snd_soc_dapm_route hx4700_audio_map[] = {
 104
 105         /* Headphone connected to LOUT, ROUT */
 106         {"Headphone Jack", NULL, "LOUT"},
 107         {"Headphone Jack", NULL, "ROUT"},
 108
 109         /* Speaker connected to MOUT2 */
 110         {"Speaker", NULL, "MOUT2"},
 111
 112         /* Microphone connected to MICIN */
 113         {"MICIN", NULL, "Built-in Microphone"},
 114         {"AIN", NULL, "MICOUT"},
 115 };
 116
 117 /*
 118  * Logic for a ak4641 as connected on a HP iPAQ hx4700
 119  */
 120 static int hx4700_ak4641_init(struct snd_soc_pcm_runtime *rtd)
 121 {
 122         int err;
 123
 124         /* Jack detection API stuff */
 125         err = snd_soc_card_jack_new(rtd->card, "Headphone Jack",
 126                                     SND_JACK_HEADPHONE, &hs_jack, hs_jack_pin,
 127                                     ARRAY_SIZE(hs_jack_pin));
 128         if (err)
 129                 return err;
 130
 131         err = snd_soc_jack_add_gpios(&hs_jack, 1, &hs_jack_gpio);
 132
 133         return err;
 134 }
 135
 136 /* hx4700 digital audio interface glue - connects codec <--> CPU */
 137 SND_SOC_DAILINK_DEFS(ak4641,
 138         DAILINK_COMP_ARRAY(COMP_CPU("pxa2xx-i2s")),
 139         DAILINK_COMP_ARRAY(COMP_CODEC("ak4641.0-0012", "ak4641-hifi")),
 140         DAILINK_COMP_ARRAY(COMP_PLATFORM("pxa-pcm-audio")));
 141
 142 static struct snd_soc_dai_link hx4700_dai = {
 143         .name = "ak4641",
 144         .stream_name = "AK4641",
 145         .init = hx4700_ak4641_init,
 146         .dai_fmt = SND_SOC_DAIFMT_MSB | SND_SOC_DAIFMT_NB_NF |
 147                    SND_SOC_DAIFMT_CBS_CFS,
 148         .ops = &hx4700_ops,
 149         SND_SOC_DAILINK_REG(ak4641),
 150 };
 151
 152 /* hx4700 audio machine driver */
 153 static struct snd_soc_card snd_soc_card_hx4700 = {
 154         .name                   = "iPAQ hx4700",
 155         .owner                  = THIS_MODULE,
 156         .dai_link               = &hx4700_dai,
 157         .num_links              = 1,
 158         .dapm_widgets           = hx4700_dapm_widgets,
 159         .num_dapm_widgets       = ARRAY_SIZE(hx4700_dapm_widgets),
 160         .dapm_routes            = hx4700_audio_map,
 161         .num_dapm_routes        = ARRAY_SIZE(hx4700_audio_map),
 162         .fully_routed           = true,
 163 };
 164
 165 static struct gpio hx4700_audio_gpios[] = {
 166         { GPIO107_HX4700_SPK_nSD, GPIOF_OUT_INIT_HIGH, "SPK_POWER" },
 167         { GPIO92_HX4700_HP_DRIVER, GPIOF_OUT_INIT_LOW, "EP_POWER" },
 168 };
 169
 170 static int hx4700_audio_probe(struct platform_device *pdev)
 171 {
 172         int ret;
 173
 174         if (!machine_is_h4700())
 175                 return -ENODEV;
 176
 177         ret = gpio_request_array(hx4700_audio_gpios,
 178                                 ARRAY_SIZE(hx4700_audio_gpios));
 179         if (ret)
 180                 return ret;
 181
 182         snd_soc_card_hx4700.dev = &pdev->dev;
 183         ret = devm_snd_soc_register_card(&pdev->dev, &snd_soc_card_hx4700);
 184         if (ret)
 185                 gpio_free_array(hx4700_audio_gpios,
 186                                 ARRAY_SIZE(hx4700_audio_gpios));
 187
 188         return ret;
 189 }
 190
 191 static int hx4700_audio_remove(struct platform_device *pdev)
 192 {
 193         gpio_set_value(GPIO92_HX4700_HP_DRIVER, 0);
 194         gpio_set_value(GPIO107_HX4700_SPK_nSD, 0);
 195
 196         gpio_free_array(hx4700_audio_gpios, ARRAY_SIZE(hx4700_audio_gpios));
 197         return 0;
 198 }
 199
 200 static struct platform_driver hx4700_audio_driver = {
 201         .driver = {
 202                 .name = "hx4700-audio",
 203                 .pm = &snd_soc_pm_ops,
 204         },
 205         .probe  = hx4700_audio_probe,
 206         .remove = hx4700_audio_remove,
 207 };
 208
 209 module_platform_driver(hx4700_audio_driver);
 210
 211 MODULE_AUTHOR("Philipp Zabel");
 212 MODULE_DESCRIPTION("ALSA SoC iPAQ hx4700");
 213 MODULE_LICENSE("GPL");
 214 MODULE_ALIAS("platform:hx4700-audio");