linux/sound/soc/pxa/z2.c
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   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 * linux/sound/soc/pxa/z2.c
   4 *
   5 * SoC Audio driver for Aeronix Zipit Z2
   6 *
   7 * Copyright (C) 2009 Ken McGuire <kenm@desertweyr.com>
   8 * Copyright (C) 2010 Marek Vasut <marek.vasut@gmail.com>
   9 */
  10
  11#include <linux/module.h>
  12#include <linux/moduleparam.h>
  13#include <linux/timer.h>
  14#include <linux/interrupt.h>
  15#include <linux/platform_device.h>
  16#include <linux/gpio.h>
  17
  18#include <sound/core.h>
  19#include <sound/pcm.h>
  20#include <sound/soc.h>
  21#include <sound/jack.h>
  22
  23#include <asm/mach-types.h>
  24#include <mach/hardware.h>
  25#include <mach/audio.h>
  26#include <mach/z2.h>
  27
  28#include "../codecs/wm8750.h"
  29#include "pxa2xx-i2s.h"
  30
  31static struct snd_soc_card snd_soc_z2;
  32
  33static int z2_hw_params(struct snd_pcm_substream *substream,
  34        struct snd_pcm_hw_params *params)
  35{
  36        struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
  37        struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
  38        struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
  39        unsigned int clk = 0;
  40        int ret = 0;
  41
  42        switch (params_rate(params)) {
  43        case 8000:
  44        case 16000:
  45        case 48000:
  46        case 96000:
  47                clk = 12288000;
  48                break;
  49        case 11025:
  50        case 22050:
  51        case 44100:
  52                clk = 11289600;
  53                break;
  54        }
  55
  56        /* set the codec system clock for DAC and ADC */
  57        ret = snd_soc_dai_set_sysclk(codec_dai, WM8750_SYSCLK, clk,
  58                SND_SOC_CLOCK_IN);
  59        if (ret < 0)
  60                return ret;
  61
  62        /* set the I2S system clock as input (unused) */
  63        ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, 0,
  64                SND_SOC_CLOCK_IN);
  65        if (ret < 0)
  66                return ret;
  67
  68        return 0;
  69}
  70
  71static struct snd_soc_jack hs_jack;
  72
  73/* Headset jack detection DAPM pins */
  74static struct snd_soc_jack_pin hs_jack_pins[] = {
  75        {
  76                .pin    = "Mic Jack",
  77                .mask   = SND_JACK_MICROPHONE,
  78        },
  79        {
  80                .pin    = "Headphone Jack",
  81                .mask   = SND_JACK_HEADPHONE,
  82        },
  83        {
  84                .pin    = "Ext Spk",
  85                .mask   = SND_JACK_HEADPHONE,
  86                .invert = 1
  87        },
  88};
  89
  90/* Headset jack detection gpios */
  91static struct snd_soc_jack_gpio hs_jack_gpios[] = {
  92        {
  93                .gpio           = GPIO37_ZIPITZ2_HEADSET_DETECT,
  94                .name           = "hsdet-gpio",
  95                .report         = SND_JACK_HEADSET,
  96                .debounce_time  = 200,
  97                .invert         = 1,
  98        },
  99};
 100
 101/* z2 machine dapm widgets */
 102static const struct snd_soc_dapm_widget wm8750_dapm_widgets[] = {
 103        SND_SOC_DAPM_HP("Headphone Jack", NULL),
 104        SND_SOC_DAPM_MIC("Mic Jack", NULL),
 105        SND_SOC_DAPM_SPK("Ext Spk", NULL),
 106
 107        /* headset is a mic and mono headphone */
 108        SND_SOC_DAPM_HP("Headset Jack", NULL),
 109};
 110
 111/* Z2 machine audio_map */
 112static const struct snd_soc_dapm_route z2_audio_map[] = {
 113
 114        /* headphone connected to LOUT1, ROUT1 */
 115        {"Headphone Jack", NULL, "LOUT1"},
 116        {"Headphone Jack", NULL, "ROUT1"},
 117
 118        /* ext speaker connected to LOUT2, ROUT2  */
 119        {"Ext Spk", NULL, "ROUT2"},
 120        {"Ext Spk", NULL, "LOUT2"},
 121
 122        /* mic is connected to R input 2 - with bias */
 123        {"RINPUT2", NULL, "Mic Bias"},
 124        {"Mic Bias", NULL, "Mic Jack"},
 125};
 126
 127/*
 128 * Logic for a wm8750 as connected on a Z2 Device
 129 */
 130static int z2_wm8750_init(struct snd_soc_pcm_runtime *rtd)
 131{
 132        int ret;
 133
 134        /* Jack detection API stuff */
 135        ret = snd_soc_card_jack_new(rtd->card, "Headset Jack", SND_JACK_HEADSET,
 136                                    &hs_jack, hs_jack_pins,
 137                                    ARRAY_SIZE(hs_jack_pins));
 138        if (ret)
 139                goto err;
 140
 141        ret = snd_soc_jack_add_gpios(&hs_jack, ARRAY_SIZE(hs_jack_gpios),
 142                                hs_jack_gpios);
 143        if (ret)
 144                goto err;
 145
 146        return 0;
 147
 148err:
 149        return ret;
 150}
 151
 152static const struct snd_soc_ops z2_ops = {
 153        .hw_params = z2_hw_params,
 154};
 155
 156/* z2 digital audio interface glue - connects codec <--> CPU */
 157SND_SOC_DAILINK_DEFS(wm8750,
 158        DAILINK_COMP_ARRAY(COMP_CPU("pxa2xx-i2s")),
 159        DAILINK_COMP_ARRAY(COMP_CODEC("wm8750.0-001b", "wm8750-hifi")),
 160        DAILINK_COMP_ARRAY(COMP_PLATFORM("pxa-pcm-audio")));
 161
 162static struct snd_soc_dai_link z2_dai = {
 163        .name           = "wm8750",
 164        .stream_name    = "WM8750",
 165        .init           = z2_wm8750_init,
 166        .dai_fmt        = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
 167                          SND_SOC_DAIFMT_CBS_CFS,
 168        .ops            = &z2_ops,
 169        SND_SOC_DAILINK_REG(wm8750),
 170};
 171
 172/* z2 audio machine driver */
 173static struct snd_soc_card snd_soc_z2 = {
 174        .name           = "Z2",
 175        .owner          = THIS_MODULE,
 176        .dai_link       = &z2_dai,
 177        .num_links      = 1,
 178
 179        .dapm_widgets = wm8750_dapm_widgets,
 180        .num_dapm_widgets = ARRAY_SIZE(wm8750_dapm_widgets),
 181        .dapm_routes = z2_audio_map,
 182        .num_dapm_routes = ARRAY_SIZE(z2_audio_map),
 183        .fully_routed = true,
 184};
 185
 186static struct platform_device *z2_snd_device;
 187
 188static int __init z2_init(void)
 189{
 190        int ret;
 191
 192        if (!machine_is_zipit2())
 193                return -ENODEV;
 194
 195        z2_snd_device = platform_device_alloc("soc-audio", -1);
 196        if (!z2_snd_device)
 197                return -ENOMEM;
 198
 199        platform_set_drvdata(z2_snd_device, &snd_soc_z2);
 200        ret = platform_device_add(z2_snd_device);
 201
 202        if (ret)
 203                platform_device_put(z2_snd_device);
 204
 205        return ret;
 206}
 207
 208static void __exit z2_exit(void)
 209{
 210        platform_device_unregister(z2_snd_device);
 211}
 212
 213module_init(z2_init);
 214module_exit(z2_exit);
 215
 216MODULE_AUTHOR("Ken McGuire <kenm@desertweyr.com>, "
 217                "Marek Vasut <marek.vasut@gmail.com>");
 218MODULE_DESCRIPTION("ALSA SoC ZipitZ2");
 219MODULE_LICENSE("GPL");
 220