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