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