LXR linux/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
  34static struct snd_soc_card snd_soc_z2;
  35
  36static 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
  74static struct snd_soc_jack hs_jack;
  75
  76/* Headset jack detection DAPM pins */
  77static 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 */
  94static 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 */
 105static 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 */
 115static 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 */
 133static int z2_wm8750_init(struct snd_soc_pcm_runtime *rtd)
 134{
 135        struct snd_soc_codec *codec = rtd->codec;
 136        struct snd_soc_dapm_context *dapm = &codec->dapm;
 137        int ret;
 138
 139        /* NC codec pins */
 140        snd_soc_dapm_disable_pin(dapm, "LINPUT3");
 141        snd_soc_dapm_disable_pin(dapm, "RINPUT3");
 142        snd_soc_dapm_disable_pin(dapm, "OUT3");
 143        snd_soc_dapm_disable_pin(dapm, "MONO1");
 144
 145        /* Jack detection API stuff */
 146        ret = snd_soc_jack_new(codec, "Headset Jack", SND_JACK_HEADSET,
 147                                &hs_jack);
 148        if (ret)
 149                goto err;
 150
 151        ret = snd_soc_jack_add_pins(&hs_jack, ARRAY_SIZE(hs_jack_pins),
 152                                hs_jack_pins);
 153        if (ret)
 154                goto err;
 155
 156        ret = snd_soc_jack_add_gpios(&hs_jack, ARRAY_SIZE(hs_jack_gpios),
 157                                hs_jack_gpios);
 158        if (ret)
 159                goto err;
 160
 161        return 0;
 162
 163err:
 164        return ret;
 165}
 166
 167static struct snd_soc_ops z2_ops = {
 168        .hw_params = z2_hw_params,
 169};
 170
 171/* z2 digital audio interface glue - connects codec <--> CPU */
 172static struct snd_soc_dai_link z2_dai = {
 173        .name           = "wm8750",
 174        .stream_name    = "WM8750",
 175        .cpu_dai_name   = "pxa2xx-i2s",
 176        .codec_dai_name = "wm8750-hifi",
 177        .platform_name = "pxa-pcm-audio",
 178        .codec_name     = "wm8750.0-001b",
 179        .init           = z2_wm8750_init,
 180        .dai_fmt        = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
 181                          SND_SOC_DAIFMT_CBS_CFS,
 182        .ops            = &z2_ops,
 183};
 184
 185/* z2 audio machine driver */
 186static struct snd_soc_card snd_soc_z2 = {
 187        .name           = "Z2",
 188        .owner          = THIS_MODULE,
 189        .dai_link       = &z2_dai,
 190        .num_links      = 1,
 191
 192        .dapm_widgets = wm8750_dapm_widgets,
 193        .num_dapm_widgets = ARRAY_SIZE(wm8750_dapm_widgets),
 194        .dapm_routes = z2_audio_map,
 195        .num_dapm_routes = ARRAY_SIZE(z2_audio_map),
 196};
 197
 198static struct platform_device *z2_snd_device;
 199
 200static int __init z2_init(void)
 201{
 202        int ret;
 203
 204        if (!machine_is_zipit2())
 205                return -ENODEV;
 206
 207        z2_snd_device = platform_device_alloc("soc-audio", -1);
 208        if (!z2_snd_device)
 209                return -ENOMEM;
 210
 211        platform_set_drvdata(z2_snd_device, &snd_soc_z2);
 212        ret = platform_device_add(z2_snd_device);
 213
 214        if (ret)
 215                platform_device_put(z2_snd_device);
 216
 217        return ret;
 218}
 219
 220static void __exit z2_exit(void)
 221{
 222        platform_device_unregister(z2_snd_device);
 223}
 224
 225module_init(z2_init);
 226module_exit(z2_exit);
 227
 228MODULE_AUTHOR("Ken McGuire <kenm@desertweyr.com>, "
 229                "Marek Vasut <marek.vasut@gmail.com>");
 230MODULE_DESCRIPTION("ALSA SoC ZipitZ2");
 231MODULE_LICENSE("GPL");
 232