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acrn-kernel/sound/soc/tegra/harmony.c

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/*
* harmony.c - Harmony machine ASoC driver
*
* Author: Stephen Warren <swarren@nvidia.com>
* Copyright (C) 2010-2011 - NVIDIA, Inc.
*
* Based on code copyright/by:
*
* (c) 2009, 2010 Nvidia Graphics Pvt. Ltd.
*
* Copyright 2007 Wolfson Microelectronics PLC.
* Author: Graeme Gregory
* graeme.gregory@wolfsonmicro.com or linux@wolfsonmicro.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.
*
* 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 St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
*/
#include <asm/mach-types.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/gpio.h>
#include <mach/harmony_audio.h>
#include <sound/core.h>
#include <sound/jack.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include "../codecs/wm8903.h"
#include "tegra_das.h"
#include "tegra_i2s.h"
#include "tegra_pcm.h"
#include "tegra_asoc_utils.h"
#define DRV_NAME "tegra-snd-harmony"
#define GPIO_SPKR_EN BIT(0)
#define GPIO_INT_MIC_EN BIT(1)
#define GPIO_EXT_MIC_EN BIT(2)
struct tegra_harmony {
struct tegra_asoc_utils_data util_data;
struct harmony_audio_platform_data *pdata;
int gpio_requested;
};
static int harmony_asoc_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;
struct snd_soc_codec *codec = rtd->codec;
struct snd_soc_card *card = codec->card;
struct tegra_harmony *harmony = snd_soc_card_get_drvdata(card);
int srate, mclk, mclk_change;
int err;
srate = params_rate(params);
switch (srate) {
case 64000:
case 88200:
case 96000:
mclk = 128 * srate;
break;
default:
mclk = 256 * srate;
break;
}
/* FIXME: Codec only requires >= 3MHz if OSR==0 */
while (mclk < 6000000)
mclk *= 2;
err = tegra_asoc_utils_set_rate(&harmony->util_data, srate, mclk,
&mclk_change);
if (err < 0) {
dev_err(card->dev, "Can't configure clocks\n");
return err;
}
err = snd_soc_dai_set_fmt(codec_dai,
SND_SOC_DAIFMT_I2S |
SND_SOC_DAIFMT_NB_NF |
SND_SOC_DAIFMT_CBS_CFS);
if (err < 0) {
dev_err(card->dev, "codec_dai fmt not set\n");
return err;
}
err = snd_soc_dai_set_fmt(cpu_dai,
SND_SOC_DAIFMT_I2S |
SND_SOC_DAIFMT_NB_NF |
SND_SOC_DAIFMT_CBS_CFS);
if (err < 0) {
dev_err(card->dev, "cpu_dai fmt not set\n");
return err;
}
if (mclk_change) {
err = snd_soc_dai_set_sysclk(codec_dai, 0, mclk,
SND_SOC_CLOCK_IN);
if (err < 0) {
dev_err(card->dev, "codec_dai clock not set\n");
return err;
}
}
return 0;
}
static struct snd_soc_ops harmony_asoc_ops = {
.hw_params = harmony_asoc_hw_params,
};
static struct snd_soc_jack harmony_hp_jack;
static struct snd_soc_jack_pin harmony_hp_jack_pins[] = {
{
.pin = "Headphone Jack",
.mask = SND_JACK_HEADPHONE,
},
};
static struct snd_soc_jack_gpio harmony_hp_jack_gpios[] = {
{
.name = "headphone detect",
.report = SND_JACK_HEADPHONE,
.debounce_time = 150,
.invert = 1,
}
};
static struct snd_soc_jack harmony_mic_jack;
static struct snd_soc_jack_pin harmony_mic_jack_pins[] = {
{
.pin = "Mic Jack",
.mask = SND_JACK_MICROPHONE,
},
};
static int harmony_event_int_spk(struct snd_soc_dapm_widget *w,
struct snd_kcontrol *k, int event)
{
struct snd_soc_codec *codec = w->codec;
struct snd_soc_card *card = codec->card;
struct tegra_harmony *harmony = snd_soc_card_get_drvdata(card);
struct harmony_audio_platform_data *pdata = harmony->pdata;
gpio_set_value_cansleep(pdata->gpio_spkr_en,
SND_SOC_DAPM_EVENT_ON(event));
return 0;
}
static const struct snd_soc_dapm_widget harmony_dapm_widgets[] = {
SND_SOC_DAPM_SPK("Int Spk", harmony_event_int_spk),
SND_SOC_DAPM_HP("Headphone Jack", NULL),
SND_SOC_DAPM_MIC("Mic Jack", NULL),
};
static const struct snd_soc_dapm_route harmony_audio_map[] = {
{"Headphone Jack", NULL, "HPOUTR"},
{"Headphone Jack", NULL, "HPOUTL"},
{"Int Spk", NULL, "ROP"},
{"Int Spk", NULL, "RON"},
{"Int Spk", NULL, "LOP"},
{"Int Spk", NULL, "LON"},
{"Mic Bias", NULL, "Mic Jack"},
{"IN1L", NULL, "Mic Bias"},
};
static const struct snd_kcontrol_new harmony_controls[] = {
SOC_DAPM_PIN_SWITCH("Int Spk"),
};
static int harmony_asoc_init(struct snd_soc_pcm_runtime *rtd)
{
struct snd_soc_codec *codec = rtd->codec;
struct snd_soc_dapm_context *dapm = &codec->dapm;
struct snd_soc_card *card = codec->card;
struct tegra_harmony *harmony = snd_soc_card_get_drvdata(card);
struct harmony_audio_platform_data *pdata = harmony->pdata;
int ret;
ret = gpio_request(pdata->gpio_spkr_en, "spkr_en");
if (ret) {
dev_err(card->dev, "cannot get spkr_en gpio\n");
return ret;
}
harmony->gpio_requested |= GPIO_SPKR_EN;
gpio_direction_output(pdata->gpio_spkr_en, 0);
ret = gpio_request(pdata->gpio_int_mic_en, "int_mic_en");
if (ret) {
dev_err(card->dev, "cannot get int_mic_en gpio\n");
return ret;
}
harmony->gpio_requested |= GPIO_INT_MIC_EN;
/* Disable int mic; enable signal is active-high */
gpio_direction_output(pdata->gpio_int_mic_en, 0);
ret = gpio_request(pdata->gpio_ext_mic_en, "ext_mic_en");
if (ret) {
dev_err(card->dev, "cannot get ext_mic_en gpio\n");
return ret;
}
harmony->gpio_requested |= GPIO_EXT_MIC_EN;
/* Enable ext mic; enable signal is active-low */
gpio_direction_output(pdata->gpio_ext_mic_en, 0);
ret = snd_soc_add_controls(codec, harmony_controls,
ARRAY_SIZE(harmony_controls));
if (ret < 0)
return ret;
snd_soc_dapm_new_controls(dapm, harmony_dapm_widgets,
ARRAY_SIZE(harmony_dapm_widgets));
snd_soc_dapm_add_routes(dapm, harmony_audio_map,
ARRAY_SIZE(harmony_audio_map));
harmony_hp_jack_gpios[0].gpio = pdata->gpio_hp_det;
snd_soc_jack_new(codec, "Headphone Jack", SND_JACK_HEADPHONE,
&harmony_hp_jack);
snd_soc_jack_add_pins(&harmony_hp_jack,
ARRAY_SIZE(harmony_hp_jack_pins),
harmony_hp_jack_pins);
snd_soc_jack_add_gpios(&harmony_hp_jack,
ARRAY_SIZE(harmony_hp_jack_gpios),
harmony_hp_jack_gpios);
snd_soc_jack_new(codec, "Mic Jack", SND_JACK_MICROPHONE,
&harmony_mic_jack);
snd_soc_jack_add_pins(&harmony_mic_jack,
ARRAY_SIZE(harmony_mic_jack_pins),
harmony_mic_jack_pins);
wm8903_mic_detect(codec, &harmony_mic_jack, SND_JACK_MICROPHONE, 0);
snd_soc_dapm_force_enable_pin(dapm, "Mic Bias");
snd_soc_dapm_nc_pin(dapm, "IN3L");
snd_soc_dapm_nc_pin(dapm, "IN3R");
snd_soc_dapm_nc_pin(dapm, "LINEOUTL");
snd_soc_dapm_nc_pin(dapm, "LINEOUTR");
snd_soc_dapm_sync(dapm);
return 0;
}
static struct snd_soc_dai_link harmony_wm8903_dai = {
.name = "WM8903",
.stream_name = "WM8903 PCM",
.codec_name = "wm8903.0-001a",
.platform_name = "tegra-pcm-audio",
.cpu_dai_name = "tegra-i2s.0",
.codec_dai_name = "wm8903-hifi",
.init = harmony_asoc_init,
.ops = &harmony_asoc_ops,
};
static struct snd_soc_card snd_soc_harmony = {
.name = "tegra-harmony",
.dai_link = &harmony_wm8903_dai,
.num_links = 1,
};
static __devinit int tegra_snd_harmony_probe(struct platform_device *pdev)
{
struct snd_soc_card *card = &snd_soc_harmony;
struct tegra_harmony *harmony;
struct harmony_audio_platform_data *pdata;
int ret;
if (!machine_is_harmony()) {
dev_err(&pdev->dev, "Not running on Tegra Harmony!\n");
return -ENODEV;
}
pdata = pdev->dev.platform_data;
if (!pdata) {
dev_err(&pdev->dev, "no platform data supplied\n");
return -EINVAL;
}
harmony = kzalloc(sizeof(struct tegra_harmony), GFP_KERNEL);
if (!harmony) {
dev_err(&pdev->dev, "Can't allocate tegra_harmony\n");
return -ENOMEM;
}
harmony->pdata = pdata;
ret = tegra_asoc_utils_init(&harmony->util_data, &pdev->dev);
if (ret)
goto err_free_harmony;
card->dev = &pdev->dev;
platform_set_drvdata(pdev, card);
snd_soc_card_set_drvdata(card, harmony);
ret = snd_soc_register_card(card);
if (ret) {
dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
ret);
goto err_clear_drvdata;
}
return 0;
err_clear_drvdata:
snd_soc_card_set_drvdata(card, NULL);
platform_set_drvdata(pdev, NULL);
card->dev = NULL;
tegra_asoc_utils_fini(&harmony->util_data);
err_free_harmony:
kfree(harmony);
return ret;
}
static int __devexit tegra_snd_harmony_remove(struct platform_device *pdev)
{
struct snd_soc_card *card = platform_get_drvdata(pdev);
struct tegra_harmony *harmony = snd_soc_card_get_drvdata(card);
struct harmony_audio_platform_data *pdata = harmony->pdata;
snd_soc_unregister_card(card);
snd_soc_card_set_drvdata(card, NULL);
platform_set_drvdata(pdev, NULL);
card->dev = NULL;
tegra_asoc_utils_fini(&harmony->util_data);
if (harmony->gpio_requested & GPIO_EXT_MIC_EN)
gpio_free(pdata->gpio_ext_mic_en);
if (harmony->gpio_requested & GPIO_INT_MIC_EN)
gpio_free(pdata->gpio_int_mic_en);
if (harmony->gpio_requested & GPIO_SPKR_EN)
gpio_free(pdata->gpio_spkr_en);
kfree(harmony);
return 0;
}
static struct platform_driver tegra_snd_harmony_driver = {
.driver = {
.name = DRV_NAME,
.owner = THIS_MODULE,
},
.probe = tegra_snd_harmony_probe,
.remove = __devexit_p(tegra_snd_harmony_remove),
};
static int __init snd_tegra_harmony_init(void)
{
return platform_driver_register(&tegra_snd_harmony_driver);
}
module_init(snd_tegra_harmony_init);
static void __exit snd_tegra_harmony_exit(void)
{
platform_driver_unregister(&tegra_snd_harmony_driver);
}
module_exit(snd_tegra_harmony_exit);
MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
MODULE_DESCRIPTION("Harmony machine ASoC driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:" DRV_NAME);
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