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/*
* linux/sound/soc/pxa/z2.c
*
* SoC Audio driver for Aeronix Zipit Z2
*
* Copyright (C) 2009 Ken McGuire <kenm@desertweyr.com>
* Copyright (C) 2010 Marek Vasut <marek.vasut@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/timer.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/gpio.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include <sound/jack.h>
#include <asm/mach-types.h>
#include <mach/hardware.h>
#include <mach/audio.h>
#include <mach/z2.h>
#include "../codecs/wm8750.h"
#include "pxa2xx-i2s.h"
static struct snd_soc_card snd_soc_z2;
static int z2_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_dai *codec_dai = rtd->codec_dai;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
unsigned int clk = 0;
int ret = 0;
switch (params_rate(params)) {
case 8000:
case 16000:
case 48000:
case 96000:
clk = 12288000;
break;
case 11025:
case 22050:
case 44100:
clk = 11289600;
break;
}
/* set the codec system clock for DAC and ADC */
ret = snd_soc_dai_set_sysclk(codec_dai, WM8750_SYSCLK, clk,
SND_SOC_CLOCK_IN);
if (ret < 0)
return ret;
/* set the I2S system clock as input (unused) */
ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, 0,
SND_SOC_CLOCK_IN);
if (ret < 0)
return ret;
return 0;
}
static struct snd_soc_jack hs_jack;
/* Headset jack detection DAPM pins */
static struct snd_soc_jack_pin hs_jack_pins[] = {
{
.pin = "Mic Jack",
.mask = SND_JACK_MICROPHONE,
},
{
.pin = "Headphone Jack",
.mask = SND_JACK_HEADPHONE,
},
{
.pin = "Ext Spk",
.mask = SND_JACK_HEADPHONE,
.invert = 1
},
};
/* Headset jack detection gpios */
static struct snd_soc_jack_gpio hs_jack_gpios[] = {
{
.gpio = GPIO37_ZIPITZ2_HEADSET_DETECT,
.name = "hsdet-gpio",
.report = SND_JACK_HEADSET,
.debounce_time = 200,
.invert = 1,
},
};
/* z2 machine dapm widgets */
static const struct snd_soc_dapm_widget wm8750_dapm_widgets[] = {
SND_SOC_DAPM_HP("Headphone Jack", NULL),
SND_SOC_DAPM_MIC("Mic Jack", NULL),
SND_SOC_DAPM_SPK("Ext Spk", NULL),
/* headset is a mic and mono headphone */
SND_SOC_DAPM_HP("Headset Jack", NULL),
};
/* Z2 machine audio_map */
static const struct snd_soc_dapm_route audio_map[] = {
/* headphone connected to LOUT1, ROUT1 */
{"Headphone Jack", NULL, "LOUT1"},
{"Headphone Jack", NULL, "ROUT1"},
/* ext speaker connected to LOUT2, ROUT2 */
{"Ext Spk", NULL , "ROUT2"},
{"Ext Spk", NULL , "LOUT2"},
/* mic is connected to R input 2 - with bias */
{"RINPUT2", NULL, "Mic Bias"},
{"Mic Bias", NULL, "Mic Jack"},
};
/*
* Logic for a wm8750 as connected on a Z2 Device
*/
static int z2_wm8750_init(struct snd_soc_pcm_runtime *rtd)
{
struct snd_soc_codec *codec = rtd->codec;
struct snd_soc_dapm_context *dapm = &codec->dapm;
int ret;
/* NC codec pins */
snd_soc_dapm_disable_pin(dapm, "LINPUT3");
snd_soc_dapm_disable_pin(dapm, "RINPUT3");
snd_soc_dapm_disable_pin(dapm, "OUT3");
snd_soc_dapm_disable_pin(dapm, "MONO1");
/* Add z2 specific widgets */
snd_soc_dapm_new_controls(dapm, wm8750_dapm_widgets,
ARRAY_SIZE(wm8750_dapm_widgets));
/* Set up z2 specific audio paths */
snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map));
/* Jack detection API stuff */
ret = snd_soc_jack_new(codec, "Headset Jack", SND_JACK_HEADSET,
&hs_jack);
if (ret)
goto err;
ret = snd_soc_jack_add_pins(&hs_jack, ARRAY_SIZE(hs_jack_pins),
hs_jack_pins);
if (ret)
goto err;
ret = snd_soc_jack_add_gpios(&hs_jack, ARRAY_SIZE(hs_jack_gpios),
hs_jack_gpios);
if (ret)
goto err;
return 0;
err:
return ret;
}
static struct snd_soc_ops z2_ops = {
.hw_params = z2_hw_params,
};
/* z2 digital audio interface glue - connects codec <--> CPU */
static struct snd_soc_dai_link z2_dai = {
.name = "wm8750",
.stream_name = "WM8750",
.cpu_dai_name = "pxa2xx-i2s",
.codec_dai_name = "wm8750-hifi",
.platform_name = "pxa-pcm-audio",
.codec_name = "wm8750.0-001b",
.init = z2_wm8750_init,
.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
SND_SOC_DAIFMT_CBS_CFS,
.ops = &z2_ops,
};
/* z2 audio machine driver */
static struct snd_soc_card snd_soc_z2 = {
.name = "Z2",
.owner = THIS_MODULE,
.dai_link = &z2_dai,
.num_links = 1,
};
static struct platform_device *z2_snd_device;
static int __init z2_init(void)
{
int ret;
if (!machine_is_zipit2())
return -ENODEV;
z2_snd_device = platform_device_alloc("soc-audio", -1);
if (!z2_snd_device)
return -ENOMEM;
platform_set_drvdata(z2_snd_device, &snd_soc_z2);
ret = platform_device_add(z2_snd_device);
if (ret)
platform_device_put(z2_snd_device);
return ret;
}
static void __exit z2_exit(void)
{
platform_device_unregister(z2_snd_device);
}
module_init(z2_init);
module_exit(z2_exit);
MODULE_AUTHOR("Ken McGuire <kenm@desertweyr.com>, "
"Marek Vasut <marek.vasut@gmail.com>");
MODULE_DESCRIPTION("ALSA SoC ZipitZ2");
MODULE_LICENSE("GPL");
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