sound/soc/pxa/z2.c

   1 /*
   2  * linux/sound/soc/pxa/z2.c
   3  *
   4  * SoC Audio driver for Aeronix Zipit Z2
   5  *
   6  * Copyright (C) 2009 Ken McGuire <kenm@desertweyr.com>
   7  * Copyright (C) 2010 Marek Vasut <marek.vasut@gmail.com>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  */
  13
  14 #include <linux/module.h>
  15 #include <linux/moduleparam.h>
  16 #include <linux/timer.h>
  17 #include <linux/interrupt.h>
  18 #include <linux/platform_device.h>
  19 #include <linux/gpio.h>
  20
  21 #include <sound/core.h>
  22 #include <sound/pcm.h>
  23 #include <sound/soc.h>
  24 #include <sound/soc-dapm.h>
  25 #include <sound/jack.h>
  26
  27 #include <asm/mach-types.h>
  28 #include <mach/hardware.h>
  29 #include <mach/audio.h>
  30 #include <mach/z2.h>
  31
  32 #include "../codecs/wm8750.h"
  33 #include "pxa2xx-i2s.h"
  34
  35 static struct snd_soc_card snd_soc_z2;
  36
  37 static int z2_hw_params(struct snd_pcm_substream *substream,
  38         struct snd_pcm_hw_params *params)
  39 {
  40         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  41         struct snd_soc_dai *codec_dai = rtd->codec_dai;
  42         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  43         unsigned int clk = 0;
  44         int ret = 0;
  45
  46         switch (params_rate(params)) {
  47         case 8000:
  48         case 16000:
  49         case 48000:
  50         case 96000:
  51                 clk = 12288000;
  52                 break;
  53         case 11025:
  54         case 22050:
  55         case 44100:
  56                 clk = 11289600;
  57                 break;
  58         }
  59
  60         /* set codec DAI configuration */
  61         ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
  62                 SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
  63         if (ret < 0)
  64                 return ret;
  65
  66         /* set cpu DAI configuration */
  67         ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
  68                 SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
  69         if (ret < 0)
  70                 return ret;
  71
  72         /* set the codec system clock for DAC and ADC */
  73         ret = snd_soc_dai_set_sysclk(codec_dai, WM8750_SYSCLK, clk,
  74                 SND_SOC_CLOCK_IN);
  75         if (ret < 0)
  76                 return ret;
  77
  78         /* set the I2S system clock as input (unused) */
  79         ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, 0,
  80                 SND_SOC_CLOCK_IN);
  81         if (ret < 0)
  82                 return ret;
  83
  84         return 0;
  85 }
  86
  87 static struct snd_soc_jack hs_jack;
  88
  89 /* Headset jack detection DAPM pins */
  90 static struct snd_soc_jack_pin hs_jack_pins[] = {
  91         {
  92                 .pin    = "Mic Jack",
  93                 .mask   = SND_JACK_MICROPHONE,
  94         },
  95         {
  96                 .pin    = "Headphone Jack",
  97                 .mask   = SND_JACK_HEADPHONE,
  98         },
  99 };
 100
 101 /* Headset jack detection gpios */
 102 static struct snd_soc_jack_gpio hs_jack_gpios[] = {
 103         {
 104                 .gpio           = GPIO37_ZIPITZ2_HEADSET_DETECT,
 105                 .name           = "hsdet-gpio",
 106                 .report         = SND_JACK_HEADSET,
 107                 .debounce_time  = 200,
 108         },
 109 };
 110
 111 /* z2 machine dapm widgets */
 112 static const struct snd_soc_dapm_widget wm8750_dapm_widgets[] = {
 113         SND_SOC_DAPM_HP("Headphone Jack", NULL),
 114         SND_SOC_DAPM_MIC("Mic Jack", NULL),
 115         SND_SOC_DAPM_SPK("Ext Spk", NULL),
 116
 117         /* headset is a mic and mono headphone */
 118         SND_SOC_DAPM_HP("Headset Jack", NULL),
 119 };
 120
 121 /* Z2 machine audio_map */
 122 static const struct snd_soc_dapm_route audio_map[] = {
 123
 124         /* headphone connected to LOUT1, ROUT1 */
 125         {"Headphone Jack", NULL, "LOUT1"},
 126         {"Headphone Jack", NULL, "ROUT1"},
 127
 128         /* ext speaker connected to LOUT2, ROUT2  */
 129         {"Ext Spk", NULL , "ROUT2"},
 130         {"Ext Spk", NULL , "LOUT2"},
 131
 132         /* mic is connected to R input 2 - with bias */
 133         {"RINPUT2", NULL, "Mic Bias"},
 134         {"Mic Bias", NULL, "Mic Jack"},
 135 };
 136
 137 /*
 138  * Logic for a wm8750 as connected on a Z2 Device
 139  */
 140 static int z2_wm8750_init(struct snd_soc_pcm_runtime *rtd)
 141 {
 142         struct snd_soc_codec *codec = rtd->codec;
 143         int ret;
 144
 145         /* NC codec pins */
 146         snd_soc_dapm_disable_pin(codec, "LINPUT3");
 147         snd_soc_dapm_disable_pin(codec, "RINPUT3");
 148         snd_soc_dapm_disable_pin(codec, "OUT3");
 149         snd_soc_dapm_disable_pin(codec, "MONO");
 150
 151         /* Add z2 specific widgets */
 152         snd_soc_dapm_new_controls(codec, wm8750_dapm_widgets,
 153                                  ARRAY_SIZE(wm8750_dapm_widgets));
 154
 155         /* Set up z2 specific audio paths */
 156         snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
 157
 158         ret = snd_soc_dapm_sync(codec);
 159         if (ret)
 160                 goto err;
 161
 162         /* Jack detection API stuff */
 163         ret = snd_soc_jack_new(codec, "Headset Jack", SND_JACK_HEADSET,
 164                                 &hs_jack);
 165         if (ret)
 166                 goto err;
 167
 168         ret = snd_soc_jack_add_pins(&hs_jack, ARRAY_SIZE(hs_jack_pins),
 169                                 hs_jack_pins);
 170         if (ret)
 171                 goto err;
 172
 173         ret = snd_soc_jack_add_gpios(&hs_jack, ARRAY_SIZE(hs_jack_gpios),
 174                                 hs_jack_gpios);
 175         if (ret)
 176                 goto err;
 177
 178         return 0;
 179
 180 err:
 181         return ret;
 182 }
 183
 184 static struct snd_soc_ops z2_ops = {
 185         .hw_params = z2_hw_params,
 186 };
 187
 188 /* z2 digital audio interface glue - connects codec <--> CPU */
 189 static struct snd_soc_dai_link z2_dai = {
 190         .name           = "wm8750",
 191         .stream_name    = "WM8750",
 192         .cpu_dai_name   = "pxa2xx-i2s",
 193         .codec_dai_name = "wm8750-hifi",
 194         .platform_name = "pxa-pcm-audio",
 195         .codec_name     = "wm8750-codec.0-001a",
 196         .init           = z2_wm8750_init,
 197         .ops            = &z2_ops,
 198 };
 199
 200 /* z2 audio machine driver */
 201 static struct snd_soc_card snd_soc_z2 = {
 202         .name           = "Z2",
 203         .dai_link       = &z2_dai,
 204         .num_links      = 1,
 205 };
 206
 207 static struct platform_device *z2_snd_device;
 208
 209 static int __init z2_init(void)
 210 {
 211         int ret;
 212
 213         if (!machine_is_zipit2())
 214                 return -ENODEV;
 215
 216         z2_snd_device = platform_device_alloc("soc-audio", -1);
 217         if (!z2_snd_device)
 218                 return -ENOMEM;
 219
 220         platform_set_drvdata(z2_snd_device, &snd_soc_z2);
 221         ret = platform_device_add(z2_snd_device);
 222
 223         if (ret)
 224                 platform_device_put(z2_snd_device);
 225
 226         return ret;
 227 }
 228
 229 static void __exit z2_exit(void)
 230 {
 231         platform_device_unregister(z2_snd_device);
 232 }
 233
 234 module_init(z2_init);
 235 module_exit(z2_exit);
 236
 237 MODULE_AUTHOR("Ken McGuire <kenm@desertweyr.com>, "
 238                 "Marek Vasut <marek.vasut@gmail.com>");
 239 MODULE_DESCRIPTION("ALSA SoC ZipitZ2");
 240 MODULE_LICENSE("GPL");