root/sound/soc/pxa/z2.c

DEFINITIONS

1. z2_hw_params
2. z2_wm8750_init
3. z2_init
4. z2_exit

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * linux/sound/soc/pxa/z2.c
   4  *
   5  * SoC Audio driver for Aeronix Zipit Z2
   6  *
   7  * Copyright (C) 2009 Ken McGuire <kenm@desertweyr.com>
   8  * Copyright (C) 2010 Marek Vasut <marek.vasut@gmail.com>
   9  */
  10 
  11 #include <linux/module.h>
  12 #include <linux/moduleparam.h>
  13 #include <linux/timer.h>
  14 #include <linux/interrupt.h>
  15 #include <linux/platform_device.h>
  16 #include <linux/gpio.h>
  17 
  18 #include <sound/core.h>
  19 #include <sound/pcm.h>
  20 #include <sound/soc.h>
  21 #include <sound/jack.h>
  22 
  23 #include <asm/mach-types.h>
  24 #include <mach/hardware.h>
  25 #include <mach/audio.h>
  26 #include <mach/z2.h>
  27 
  28 #include "../codecs/wm8750.h"
  29 #include "pxa2xx-i2s.h"
  30 
  31 static struct snd_soc_card snd_soc_z2;
  32 
  33 static int z2_hw_params(struct snd_pcm_substream *substream,
  34         struct snd_pcm_hw_params *params)
  35 {
  36         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  37         struct snd_soc_dai *codec_dai = rtd->codec_dai;
  38         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  39         unsigned int clk = 0;
  40         int ret = 0;
  41 
  42         switch (params_rate(params)) {
  43         case 8000:
  44         case 16000:
  45         case 48000:
  46         case 96000:
  47                 clk = 12288000;
  48                 break;
  49         case 11025:
  50         case 22050:
  51         case 44100:
  52                 clk = 11289600;
  53                 break;
  54         }
  55 
  56         /* set the codec system clock for DAC and ADC */
  57         ret = snd_soc_dai_set_sysclk(codec_dai, WM8750_SYSCLK, clk,
  58                 SND_SOC_CLOCK_IN);
  59         if (ret < 0)
  60                 return ret;
  61 
  62         /* set the I2S system clock as input (unused) */
  63         ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, 0,
  64                 SND_SOC_CLOCK_IN);
  65         if (ret < 0)
  66                 return ret;
  67 
  68         return 0;
  69 }
  70 
  71 static struct snd_soc_jack hs_jack;
  72 
  73 /* Headset jack detection DAPM pins */
  74 static struct snd_soc_jack_pin hs_jack_pins[] = {
  75         {
  76                 .pin    = "Mic Jack",
  77                 .mask   = SND_JACK_MICROPHONE,
  78         },
  79         {
  80                 .pin    = "Headphone Jack",
  81                 .mask   = SND_JACK_HEADPHONE,
  82         },
  83         {
  84                 .pin    = "Ext Spk",
  85                 .mask   = SND_JACK_HEADPHONE,
  86                 .invert = 1
  87         },
  88 };
  89 
  90 /* Headset jack detection gpios */
  91 static struct snd_soc_jack_gpio hs_jack_gpios[] = {
  92         {
  93                 .gpio           = GPIO37_ZIPITZ2_HEADSET_DETECT,
  94                 .name           = "hsdet-gpio",
  95                 .report         = SND_JACK_HEADSET,
  96                 .debounce_time  = 200,
  97                 .invert         = 1,
  98         },
  99 };
 100 
 101 /* z2 machine dapm widgets */
 102 static const struct snd_soc_dapm_widget wm8750_dapm_widgets[] = {
 103         SND_SOC_DAPM_HP("Headphone Jack", NULL),
 104         SND_SOC_DAPM_MIC("Mic Jack", NULL),
 105         SND_SOC_DAPM_SPK("Ext Spk", NULL),
 106 
 107         /* headset is a mic and mono headphone */
 108         SND_SOC_DAPM_HP("Headset Jack", NULL),
 109 };
 110 
 111 /* Z2 machine audio_map */
 112 static const struct snd_soc_dapm_route z2_audio_map[] = {
 113 
 114         /* headphone connected to LOUT1, ROUT1 */
 115         {"Headphone Jack", NULL, "LOUT1"},
 116         {"Headphone Jack", NULL, "ROUT1"},
 117 
 118         /* ext speaker connected to LOUT2, ROUT2  */
 119         {"Ext Spk", NULL, "ROUT2"},
 120         {"Ext Spk", NULL, "LOUT2"},
 121 
 122         /* mic is connected to R input 2 - with bias */
 123         {"RINPUT2", NULL, "Mic Bias"},
 124         {"Mic Bias", NULL, "Mic Jack"},
 125 };
 126 
 127 /*
 128  * Logic for a wm8750 as connected on a Z2 Device
 129  */
 130 static int z2_wm8750_init(struct snd_soc_pcm_runtime *rtd)
 131 {
 132         int ret;
 133 
 134         /* Jack detection API stuff */
 135         ret = snd_soc_card_jack_new(rtd->card, "Headset Jack", SND_JACK_HEADSET,
 136                                     &hs_jack, hs_jack_pins,
 137                                     ARRAY_SIZE(hs_jack_pins));
 138         if (ret)
 139                 goto err;
 140 
 141         ret = snd_soc_jack_add_gpios(&hs_jack, ARRAY_SIZE(hs_jack_gpios),
 142                                 hs_jack_gpios);
 143         if (ret)
 144                 goto err;
 145 
 146         return 0;
 147 
 148 err:
 149         return ret;
 150 }
 151 
 152 static const struct snd_soc_ops z2_ops = {
 153         .hw_params = z2_hw_params,
 154 };
 155 
 156 /* z2 digital audio interface glue - connects codec <--> CPU */
 157 SND_SOC_DAILINK_DEFS(wm8750,
 158         DAILINK_COMP_ARRAY(COMP_CPU("pxa2xx-i2s")),
 159         DAILINK_COMP_ARRAY(COMP_CODEC("wm8750.0-001b", "wm8750-hifi")),
 160         DAILINK_COMP_ARRAY(COMP_PLATFORM("pxa-pcm-audio")));
 161 
 162 static struct snd_soc_dai_link z2_dai = {
 163         .name           = "wm8750",
 164         .stream_name    = "WM8750",
 165         .init           = z2_wm8750_init,
 166         .dai_fmt        = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
 167                           SND_SOC_DAIFMT_CBS_CFS,
 168         .ops            = &z2_ops,
 169         SND_SOC_DAILINK_REG(wm8750),
 170 };
 171 
 172 /* z2 audio machine driver */
 173 static struct snd_soc_card snd_soc_z2 = {
 174         .name           = "Z2",
 175         .owner          = THIS_MODULE,
 176         .dai_link       = &z2_dai,
 177         .num_links      = 1,
 178 
 179         .dapm_widgets = wm8750_dapm_widgets,
 180         .num_dapm_widgets = ARRAY_SIZE(wm8750_dapm_widgets),
 181         .dapm_routes = z2_audio_map,
 182         .num_dapm_routes = ARRAY_SIZE(z2_audio_map),
 183         .fully_routed = true,
 184 };
 185 
 186 static struct platform_device *z2_snd_device;
 187 
 188 static int __init z2_init(void)
 189 {
 190         int ret;
 191 
 192         if (!machine_is_zipit2())
 193                 return -ENODEV;
 194 
 195         z2_snd_device = platform_device_alloc("soc-audio", -1);
 196         if (!z2_snd_device)
 197                 return -ENOMEM;
 198 
 199         platform_set_drvdata(z2_snd_device, &snd_soc_z2);
 200         ret = platform_device_add(z2_snd_device);
 201 
 202         if (ret)
 203                 platform_device_put(z2_snd_device);
 204 
 205         return ret;
 206 }
 207 
 208 static void __exit z2_exit(void)
 209 {
 210         platform_device_unregister(z2_snd_device);
 211 }
 212 
 213 module_init(z2_init);
 214 module_exit(z2_exit);
 215 
 216 MODULE_AUTHOR("Ken McGuire <kenm@desertweyr.com>, "
 217                 "Marek Vasut <marek.vasut@gmail.com>");
 218 MODULE_DESCRIPTION("ALSA SoC ZipitZ2");
 219 MODULE_LICENSE("GPL");