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/jack.h>
  25
  26 #include <asm/mach-types.h>
  27 #include <mach/hardware.h>
  28 #include <mach/audio.h>
  29 #include <mach/z2.h>
  30
  31 #include "../codecs/wm8750.h"
  32 #include "pxa2xx-i2s.h"
  33
  34 static struct snd_soc_card snd_soc_z2;
  35
  36 static int z2_hw_params(struct snd_pcm_substream *substream,
  37         struct snd_pcm_hw_params *params)
  38 {
  39         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  40         struct snd_soc_dai *codec_dai = rtd->codec_dai;
  41         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  42         unsigned int clk = 0;
  43         int ret = 0;
  44
  45         switch (params_rate(params)) {
  46         case 8000:
  47         case 16000:
  48         case 48000:
  49         case 96000:
  50                 clk = 12288000;
  51                 break;
  52         case 11025:
  53         case 22050:
  54         case 44100:
  55                 clk = 11289600;
  56                 break;
  57         }
  58
  59         /* set codec DAI configuration */
  60         ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
  61                 SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
  62         if (ret < 0)
  63                 return ret;
  64
  65         /* set cpu DAI configuration */
  66         ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
  67                 SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
  68         if (ret < 0)
  69                 return ret;
  70
  71         /* set the codec system clock for DAC and ADC */
  72         ret = snd_soc_dai_set_sysclk(codec_dai, WM8750_SYSCLK, clk,
  73                 SND_SOC_CLOCK_IN);
  74         if (ret < 0)
  75                 return ret;
  76
  77         /* set the I2S system clock as input (unused) */
  78         ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, 0,
  79                 SND_SOC_CLOCK_IN);
  80         if (ret < 0)
  81                 return ret;
  82
  83         return 0;
  84 }
  85
  86 static struct snd_soc_jack hs_jack;
  87
  88 /* Headset jack detection DAPM pins */
  89 static struct snd_soc_jack_pin hs_jack_pins[] = {
  90         {
  91                 .pin    = "Mic Jack",
  92                 .mask   = SND_JACK_MICROPHONE,
  93         },
  94         {
  95                 .pin    = "Headphone Jack",
  96                 .mask   = SND_JACK_HEADPHONE,
  97         },
  98         {
  99                 .pin    = "Ext Spk",
 100                 .mask   = SND_JACK_HEADPHONE,
 101                 .invert = 1
 102         },
 103 };
 104
 105 /* Headset jack detection gpios */
 106 static struct snd_soc_jack_gpio hs_jack_gpios[] = {
 107         {
 108                 .gpio           = GPIO37_ZIPITZ2_HEADSET_DETECT,
 109                 .name           = "hsdet-gpio",
 110                 .report         = SND_JACK_HEADSET,
 111                 .debounce_time  = 200,
 112                 .invert         = 1,
 113         },
 114 };
 115
 116 /* z2 machine dapm widgets */
 117 static const struct snd_soc_dapm_widget wm8750_dapm_widgets[] = {
 118         SND_SOC_DAPM_HP("Headphone Jack", NULL),
 119         SND_SOC_DAPM_MIC("Mic Jack", NULL),
 120         SND_SOC_DAPM_SPK("Ext Spk", NULL),
 121
 122         /* headset is a mic and mono headphone */
 123         SND_SOC_DAPM_HP("Headset Jack", NULL),
 124 };
 125
 126 /* Z2 machine audio_map */
 127 static const struct snd_soc_dapm_route audio_map[] = {
 128
 129         /* headphone connected to LOUT1, ROUT1 */
 130         {"Headphone Jack", NULL, "LOUT1"},
 131         {"Headphone Jack", NULL, "ROUT1"},
 132
 133         /* ext speaker connected to LOUT2, ROUT2  */
 134         {"Ext Spk", NULL , "ROUT2"},
 135         {"Ext Spk", NULL , "LOUT2"},
 136
 137         /* mic is connected to R input 2 - with bias */
 138         {"RINPUT2", NULL, "Mic Bias"},
 139         {"Mic Bias", NULL, "Mic Jack"},
 140 };
 141
 142 /*
 143  * Logic for a wm8750 as connected on a Z2 Device
 144  */
 145 static int z2_wm8750_init(struct snd_soc_pcm_runtime *rtd)
 146 {
 147         struct snd_soc_codec *codec = rtd->codec;
 148         struct snd_soc_dapm_context *dapm = &codec->dapm;
 149         int ret;
 150
 151         /* NC codec pins */
 152         snd_soc_dapm_disable_pin(dapm, "LINPUT3");
 153         snd_soc_dapm_disable_pin(dapm, "RINPUT3");
 154         snd_soc_dapm_disable_pin(dapm, "OUT3");
 155         snd_soc_dapm_disable_pin(dapm, "MONO1");
 156
 157         /* Add z2 specific widgets */
 158         snd_soc_dapm_new_controls(dapm, wm8750_dapm_widgets,
 159                                  ARRAY_SIZE(wm8750_dapm_widgets));
 160
 161         /* Set up z2 specific audio paths */
 162         snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map));
 163
 164         ret = snd_soc_dapm_sync(dapm);
 165         if (ret)
 166                 goto err;
 167
 168         /* Jack detection API stuff */
 169         ret = snd_soc_jack_new(codec, "Headset Jack", SND_JACK_HEADSET,
 170                                 &hs_jack);
 171         if (ret)
 172                 goto err;
 173
 174         ret = snd_soc_jack_add_pins(&hs_jack, ARRAY_SIZE(hs_jack_pins),
 175                                 hs_jack_pins);
 176         if (ret)
 177                 goto err;
 178
 179         ret = snd_soc_jack_add_gpios(&hs_jack, ARRAY_SIZE(hs_jack_gpios),
 180                                 hs_jack_gpios);
 181         if (ret)
 182                 goto err;
 183
 184         return 0;
 185
 186 err:
 187         return ret;
 188 }
 189
 190 static struct snd_soc_ops z2_ops = {
 191         .hw_params = z2_hw_params,
 192 };
 193
 194 /* z2 digital audio interface glue - connects codec <--> CPU */
 195 static struct snd_soc_dai_link z2_dai = {
 196         .name           = "wm8750",
 197         .stream_name    = "WM8750",
 198         .cpu_dai_name   = "pxa2xx-i2s",
 199         .codec_dai_name = "wm8750-hifi",
 200         .platform_name = "pxa-pcm-audio",
 201         .codec_name     = "wm8750-codec.0-001b",
 202         .init           = z2_wm8750_init,
 203         .ops            = &z2_ops,
 204 };
 205
 206 /* z2 audio machine driver */
 207 static struct snd_soc_card snd_soc_z2 = {
 208         .name           = "Z2",
 209         .dai_link       = &z2_dai,
 210         .num_links      = 1,
 211 };
 212
 213 static struct platform_device *z2_snd_device;
 214
 215 static int __init z2_init(void)
 216 {
 217         int ret;
 218
 219         if (!machine_is_zipit2())
 220                 return -ENODEV;
 221
 222         z2_snd_device = platform_device_alloc("soc-audio", -1);
 223         if (!z2_snd_device)
 224                 return -ENOMEM;
 225
 226         platform_set_drvdata(z2_snd_device, &snd_soc_z2);
 227         ret = platform_device_add(z2_snd_device);
 228
 229         if (ret)
 230                 platform_device_put(z2_snd_device);
 231
 232         return ret;
 233 }
 234
 235 static void __exit z2_exit(void)
 236 {
 237         platform_device_unregister(z2_snd_device);
 238 }
 239
 240 module_init(z2_init);
 241 module_exit(z2_exit);
 242
 243 MODULE_AUTHOR("Ken McGuire <kenm@desertweyr.com>, "
 244                 "Marek Vasut <marek.vasut@gmail.com>");
 245 MODULE_DESCRIPTION("ALSA SoC ZipitZ2");
 246 MODULE_LICENSE("GPL");