release/src-rt-6.x.4708/linux/linux-2.6.36/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-pcm.h"
  34 #include "pxa2xx-i2s.h"
  35
  36 static struct snd_soc_card snd_soc_z2;
  37
  38 static int z2_hw_params(struct snd_pcm_substream *substream,
  39         struct snd_pcm_hw_params *params)
  40 {
  41         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  42         struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
  43         struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
  44         unsigned int clk = 0;
  45         int ret = 0;
  46
  47         switch (params_rate(params)) {
  48         case 8000:
  49         case 16000:
  50         case 48000:
  51         case 96000:
  52                 clk = 12288000;
  53                 break;
  54         case 11025:
  55         case 22050:
  56         case 44100:
  57                 clk = 11289600;
  58                 break;
  59         }
  60
  61         /* set codec DAI configuration */
  62         ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
  63                 SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
  64         if (ret < 0)
  65                 return ret;
  66
  67         /* set cpu DAI configuration */
  68         ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
  69                 SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
  70         if (ret < 0)
  71                 return ret;
  72
  73         /* set the codec system clock for DAC and ADC */
  74         ret = snd_soc_dai_set_sysclk(codec_dai, WM8750_SYSCLK, clk,
  75                 SND_SOC_CLOCK_IN);
  76         if (ret < 0)
  77                 return ret;
  78
  79         /* set the I2S system clock as input (unused) */
  80         ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, 0,
  81                 SND_SOC_CLOCK_IN);
  82         if (ret < 0)
  83                 return ret;
  84
  85         return 0;
  86 }
  87
  88 static struct snd_soc_jack hs_jack;
  89
  90 /* Headset jack detection DAPM pins */
  91 static struct snd_soc_jack_pin hs_jack_pins[] = {
  92         {
  93                 .pin    = "Mic Jack",
  94                 .mask   = SND_JACK_MICROPHONE,
  95         },
  96         {
  97                 .pin    = "Headphone Jack",
  98                 .mask   = SND_JACK_HEADPHONE,
  99         },
 100 };
 101
 102 /* Headset jack detection gpios */
 103 static struct snd_soc_jack_gpio hs_jack_gpios[] = {
 104         {
 105                 .gpio           = GPIO37_ZIPITZ2_HEADSET_DETECT,
 106                 .name           = "hsdet-gpio",
 107                 .report         = SND_JACK_HEADSET,
 108                 .debounce_time  = 200,
 109         },
 110 };
 111
 112 /* z2 machine dapm widgets */
 113 static const struct snd_soc_dapm_widget wm8750_dapm_widgets[] = {
 114         SND_SOC_DAPM_HP("Headphone Jack", NULL),
 115         SND_SOC_DAPM_MIC("Mic Jack", NULL),
 116         SND_SOC_DAPM_SPK("Ext Spk", NULL),
 117
 118         /* headset is a mic and mono headphone */
 119         SND_SOC_DAPM_HP("Headset Jack", NULL),
 120 };
 121
 122 /* Z2 machine audio_map */
 123 static const struct snd_soc_dapm_route audio_map[] = {
 124
 125         /* headphone connected to LOUT1, ROUT1 */
 126         {"Headphone Jack", NULL, "LOUT1"},
 127         {"Headphone Jack", NULL, "ROUT1"},
 128
 129         /* ext speaker connected to LOUT2, ROUT2  */
 130         {"Ext Spk", NULL , "ROUT2"},
 131         {"Ext Spk", NULL , "LOUT2"},
 132
 133         /* mic is connected to R input 2 - with bias */
 134         {"RINPUT2", NULL, "Mic Bias"},
 135         {"Mic Bias", NULL, "Mic Jack"},
 136 };
 137
 138 /*
 139  * Logic for a wm8750 as connected on a Z2 Device
 140  */
 141 static int z2_wm8750_init(struct snd_soc_codec *codec)
 142 {
 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(&snd_soc_z2, "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        = &pxa_i2s_dai,
 193         .codec_dai      = &wm8750_dai,
 194         .init           = z2_wm8750_init,
 195         .ops            = &z2_ops,
 196 };
 197
 198 /* z2 audio machine driver */
 199 static struct snd_soc_card snd_soc_z2 = {
 200         .name           = "Z2",
 201         .platform       = &pxa2xx_soc_platform,
 202         .dai_link       = &z2_dai,
 203         .num_links      = 1,
 204 };
 205
 206 /* z2 audio subsystem */
 207 static struct snd_soc_device z2_snd_devdata = {
 208         .card           = &snd_soc_z2,
 209         .codec_dev      = &soc_codec_dev_wm8750,
 210 };
 211
 212 static struct platform_device *z2_snd_device;
 213
 214 static int __init z2_init(void)
 215 {
 216         int ret;
 217
 218         if (!machine_is_zipit2())
 219                 return -ENODEV;
 220
 221         z2_snd_device = platform_device_alloc("soc-audio", -1);
 222         if (!z2_snd_device)
 223                 return -ENOMEM;
 224
 225         platform_set_drvdata(z2_snd_device, &z2_snd_devdata);
 226         z2_snd_devdata.dev = &z2_snd_device->dev;
 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");