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/*
* sound/soc/tegra/tegra_wired_jack.c
*
* Copyright (c) 2011, NVIDIA Corporation.
*
* 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.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <linux/types.h>
#include <linux/switch.h>
#include <linux/notifier.h>
#include <sound/jack.h>
#include <sound/soc.h>
#include <mach/audio.h>
#include "tegra_soc.h"
#define HEAD_DET_GPIO 0
/* jack */
static struct snd_soc_jack *tegra_wired_jack;
static struct snd_soc_jack_pin hs_jack_pins[] = {
{
.pin = "Headset Jack",
.mask = SND_JACK_HEADSET,
},
{
.pin = "Headphone Jack",
.mask = SND_JACK_HEADPHONE,
},
{
.pin = "Mic Jack",
.mask = SND_JACK_MICROPHONE,
},
};
static struct snd_soc_jack_gpio hs_jack_gpios[] = {
{
/* gpio pin depends on board traits */
.name = "headphone-detect-gpio",
.report = SND_JACK_HEADPHONE,
.invert = 1,
.debounce_time = 200,
},
};
static struct switch_dev wired_switch_dev = {
.name = "h2w",
};
static int wired_swith_notify(struct notifier_block *self,
unsigned long action, void* dev)
{
int state = 0;
switch (action) {
case SND_JACK_HEADSET:
state = 1;
break;
case SND_JACK_HEADPHONE:
state = 2;
break;
default:
state = 0;
}
switch_set_state(&wired_switch_dev, state);
return NOTIFY_OK;
}
static struct notifier_block wired_switch_nb = {
.notifier_call = wired_swith_notify,
};
/* platform driver */
static int tegra_wired_jack_probe(struct platform_device *pdev)
{
int ret;
int hp_det_n;
struct tegra_wired_jack_conf *pdata;
pdata = (struct tegra_wired_jack_conf *)pdev->dev.platform_data;
if (!pdata || !pdata->hp_det_n) {
pr_err("Please set up gpio pins for jack.\n");
return -EBUSY;
}
hp_det_n = pdata->hp_det_n;
hs_jack_gpios[HEAD_DET_GPIO].gpio = hp_det_n;
ret = snd_soc_jack_add_gpios(tegra_wired_jack,
ARRAY_SIZE(hs_jack_gpios),
hs_jack_gpios);
if (ret) {
pr_err("Could NOT set up gpio pins for jack.\n");
snd_soc_jack_free_gpios(tegra_wired_jack,
ARRAY_SIZE(hs_jack_gpios),
hs_jack_gpios);
return ret;
}
return 0;
}
static int tegra_wired_jack_remove(struct platform_device *pdev)
{
snd_soc_jack_free_gpios(tegra_wired_jack,
ARRAY_SIZE(hs_jack_gpios),
hs_jack_gpios);
return 0;
}
static struct platform_driver tegra_wired_jack_driver = {
.probe = tegra_wired_jack_probe,
.remove = __devexit_p(tegra_wired_jack_remove),
.driver = {
.name = "tegra_wired_jack",
.owner = THIS_MODULE,
},
};
int tegra_jack_init(struct snd_soc_codec *codec)
{
int ret;
if (!codec)
return -1;
tegra_wired_jack = kzalloc(sizeof(*tegra_wired_jack), GFP_KERNEL);
if (!tegra_wired_jack) {
pr_err("failed to allocate tegra_wired_jack \n");
return -ENOMEM;
}
/* Add jack detection */
ret = snd_soc_jack_new(codec->socdev->card, "Headset Jack",
SND_JACK_HEADSET, tegra_wired_jack);
if (ret < 0)
goto failed;
ret = snd_soc_jack_add_pins(tegra_wired_jack,
ARRAY_SIZE(hs_jack_pins),
hs_jack_pins);
if (ret < 0)
goto failed;
/* Addd h2w swith class support */
ret = switch_dev_register(&wired_switch_dev);
if (ret < 0)
goto switch_dev_failed;
snd_soc_jack_notifier_register(tegra_wired_jack,
&wired_switch_nb);
ret = platform_driver_register(&tegra_wired_jack_driver);
if (ret < 0)
goto platform_dev_failed;
return 0;
switch_dev_failed:
switch_dev_unregister(&wired_switch_dev);
platform_dev_failed:
platform_driver_unregister(&tegra_wired_jack_driver);
failed:
if (tegra_wired_jack) {
kfree(tegra_wired_jack);
tegra_wired_jack = 0;
}
return ret;
}
void tegra_jack_exit(void)
{
switch_dev_unregister(&wired_switch_dev);
platform_driver_unregister(&tegra_wired_jack_driver);
if (tegra_wired_jack) {
kfree(tegra_wired_jack);
tegra_wired_jack = 0;
}
}
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