sound/soc/pxa/z2.c

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