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/*
* SoC audio for HP iPAQ hx4700
*
* Copyright (c) 2009 Philipp Zabel
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
*/
#include <linux/module.h>
#include <linux/timer.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/delay.h>
#include <linux/gpio.h>
#include <sound/core.h>
#include <sound/jack.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <mach/hx4700.h>
#include <asm/mach-types.h>
#include "pxa2xx-i2s.h"
static struct snd_soc_jack hs_jack;
/* Headphones jack detection DAPM pin */
static struct snd_soc_jack_pin hs_jack_pin[] = {
{
.pin = "Headphone Jack",
.mask = SND_JACK_HEADPHONE,
},
{
.pin = "Speaker",
/* disable speaker when hp jack is inserted */
.mask = SND_JACK_HEADPHONE,
.invert = 1,
},
};
/* Headphones jack detection GPIO */
static struct snd_soc_jack_gpio hs_jack_gpio = {
.gpio = GPIO75_HX4700_EARPHONE_nDET,
.invert = true,
.name = "hp-gpio",
.report = SND_JACK_HEADPHONE,
.debounce_time = 200,
};
/*
* iPAQ hx4700 uses I2S for capture and playback.
*/
static int hx4700_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;
int ret = 0;
/* set the I2S system clock as output */
ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, 0,
SND_SOC_CLOCK_OUT);
if (ret < 0)
return ret;
/* inform codec driver about clock freq *
* (PXA I2S always uses divider 256) */
ret = snd_soc_dai_set_sysclk(codec_dai, 0, 256 * params_rate(params),
SND_SOC_CLOCK_IN);
if (ret < 0)
return ret;
return 0;
}
static struct snd_soc_ops hx4700_ops = {
.hw_params = hx4700_hw_params,
};
static int hx4700_spk_power(struct snd_soc_dapm_widget *w,
struct snd_kcontrol *k, int event)
{
gpio_set_value(GPIO107_HX4700_SPK_nSD, !!SND_SOC_DAPM_EVENT_ON(event));
return 0;
}
static int hx4700_hp_power(struct snd_soc_dapm_widget *w,
struct snd_kcontrol *k, int event)
{
gpio_set_value(GPIO92_HX4700_HP_DRIVER, !!SND_SOC_DAPM_EVENT_ON(event));
return 0;
}
/* hx4700 machine dapm widgets */
static const struct snd_soc_dapm_widget hx4700_dapm_widgets[] = {
SND_SOC_DAPM_HP("Headphone Jack", hx4700_hp_power),
SND_SOC_DAPM_SPK("Speaker", hx4700_spk_power),
SND_SOC_DAPM_MIC("Built-in Microphone", NULL),
};
/* hx4700 machine audio_map */
static const struct snd_soc_dapm_route hx4700_audio_map[] = {
/* Headphone connected to LOUT, ROUT */
{"Headphone Jack", NULL, "LOUT"},
{"Headphone Jack", NULL, "ROUT"},
/* Speaker connected to MOUT2 */
{"Speaker", NULL, "MOUT2"},
/* Microphone connected to MICIN */
{"MICIN", NULL, "Built-in Microphone"},
{"AIN", NULL, "MICOUT"},
};
/*
* Logic for a ak4641 as connected on a HP iPAQ hx4700
*/
static int hx4700_ak4641_init(struct snd_soc_pcm_runtime *rtd)
{
int err;
/* Jack detection API stuff */
err = snd_soc_card_jack_new(rtd->card, "Headphone Jack",
SND_JACK_HEADPHONE, &hs_jack, hs_jack_pin,
ARRAY_SIZE(hs_jack_pin));
if (err)
return err;
err = snd_soc_jack_add_gpios(&hs_jack, 1, &hs_jack_gpio);
return err;
}
static int hx4700_card_remove(struct snd_soc_card *card)
{
snd_soc_jack_free_gpios(&hs_jack, 1, &hs_jack_gpio);
return 0;
}
/* hx4700 digital audio interface glue - connects codec <--> CPU */
static struct snd_soc_dai_link hx4700_dai = {
.name = "ak4641",
.stream_name = "AK4641",
.cpu_dai_name = "pxa2xx-i2s",
.codec_dai_name = "ak4641-hifi",
.platform_name = "pxa-pcm-audio",
.codec_name = "ak4641.0-0012",
.init = hx4700_ak4641_init,
.dai_fmt = SND_SOC_DAIFMT_MSB | SND_SOC_DAIFMT_NB_NF |
SND_SOC_DAIFMT_CBS_CFS,
.ops = &hx4700_ops,
};
/* hx4700 audio machine driver */
static struct snd_soc_card snd_soc_card_hx4700 = {
.name = "iPAQ hx4700",
.owner = THIS_MODULE,
.remove = hx4700_card_remove,
.dai_link = &hx4700_dai,
.num_links = 1,
.dapm_widgets = hx4700_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(hx4700_dapm_widgets),
.dapm_routes = hx4700_audio_map,
.num_dapm_routes = ARRAY_SIZE(hx4700_audio_map),
.fully_routed = true,
};
static struct gpio hx4700_audio_gpios[] = {
{ GPIO107_HX4700_SPK_nSD, GPIOF_OUT_INIT_HIGH, "SPK_POWER" },
{ GPIO92_HX4700_HP_DRIVER, GPIOF_OUT_INIT_LOW, "EP_POWER" },
};
static int hx4700_audio_probe(struct platform_device *pdev)
{
int ret;
if (!machine_is_h4700())
return -ENODEV;
ret = gpio_request_array(hx4700_audio_gpios,
ARRAY_SIZE(hx4700_audio_gpios));
if (ret)
return ret;
snd_soc_card_hx4700.dev = &pdev->dev;
ret = devm_snd_soc_register_card(&pdev->dev, &snd_soc_card_hx4700);
if (ret)
gpio_free_array(hx4700_audio_gpios,
ARRAY_SIZE(hx4700_audio_gpios));
return ret;
}
static int hx4700_audio_remove(struct platform_device *pdev)
{
gpio_set_value(GPIO92_HX4700_HP_DRIVER, 0);
gpio_set_value(GPIO107_HX4700_SPK_nSD, 0);
gpio_free_array(hx4700_audio_gpios, ARRAY_SIZE(hx4700_audio_gpios));
return 0;
}
static struct platform_driver hx4700_audio_driver = {
.driver = {
.name = "hx4700-audio",
.pm = &snd_soc_pm_ops,
},
.probe = hx4700_audio_probe,
.remove = hx4700_audio_remove,
};
module_platform_driver(hx4700_audio_driver);
MODULE_AUTHOR("Philipp Zabel");
MODULE_DESCRIPTION("ALSA SoC iPAQ hx4700");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:hx4700-audio");
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