tegra_wm8903.c
/*
* tegra_wm8903.c - Tegra machine ASoC driver for boards using WM8903 codec.
*
* Author: Stephen Warren <swarren@nvidia.com>
* Copyright (C) 2010-2012 - 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 <linux/module.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/gpio.h>
#include <linux/of_gpio.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_asoc_utils.h"
#define DRV_NAME "tegra-snd-wm8903"
struct tegra_wm8903 {
int gpio_spkr_en;
int gpio_hp_det;
int gpio_hp_mute;
int gpio_int_mic_en;
int gpio_ext_mic_en;
struct tegra_asoc_utils_data util_data;
};
static int tegra_wm8903_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_codec *codec = codec_dai->codec;
struct snd_soc_card *card = codec->card;
struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
int srate, mclk;
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(&machine->util_data, srate, mclk);
if (err < 0) {
dev_err(card->dev, "Can't configure clocks\n");
return err;
}
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 tegra_wm8903_ops = {
.hw_params = tegra_wm8903_hw_params,
};
static struct snd_soc_jack tegra_wm8903_hp_jack;
static struct snd_soc_jack_pin tegra_wm8903_hp_jack_pins[] = {
{
.pin = "Headphone Jack",
.mask = SND_JACK_HEADPHONE,
},
};
static struct snd_soc_jack_gpio tegra_wm8903_hp_jack_gpio = {
.name = "headphone detect",
.report = SND_JACK_HEADPHONE,
.debounce_time = 150,
.invert = 1,
};
static struct snd_soc_jack tegra_wm8903_mic_jack;
static struct snd_soc_jack_pin tegra_wm8903_mic_jack_pins[] = {
{
.pin = "Mic Jack",
.mask = SND_JACK_MICROPHONE,
},
};
static int tegra_wm8903_event_int_spk(struct snd_soc_dapm_widget *w,
struct snd_kcontrol *k, int event)
{
struct snd_soc_dapm_context *dapm = w->dapm;
struct snd_soc_card *card = dapm->card;
struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
if (!gpio_is_valid(machine->gpio_spkr_en))
return 0;
gpio_set_value_cansleep(machine->gpio_spkr_en,
SND_SOC_DAPM_EVENT_ON(event));
return 0;
}
static int tegra_wm8903_event_hp(struct snd_soc_dapm_widget *w,
struct snd_kcontrol *k, int event)
{
struct snd_soc_dapm_context *dapm = w->dapm;
struct snd_soc_card *card = dapm->card;
struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
if (!gpio_is_valid(machine->gpio_hp_mute))
return 0;
gpio_set_value_cansleep(machine->gpio_hp_mute,
!SND_SOC_DAPM_EVENT_ON(event));
return 0;
}
static const struct snd_soc_dapm_widget tegra_wm8903_dapm_widgets[] = {
SND_SOC_DAPM_SPK("Int Spk", tegra_wm8903_event_int_spk),
SND_SOC_DAPM_HP("Headphone Jack", tegra_wm8903_event_hp),
SND_SOC_DAPM_MIC("Mic Jack", NULL),
};
static const struct snd_kcontrol_new tegra_wm8903_controls[] = {
SOC_DAPM_PIN_SWITCH("Int Spk"),
};
static int tegra_wm8903_init(struct snd_soc_pcm_runtime *rtd)
{
struct snd_soc_dai *codec_dai = rtd->codec_dai;
struct snd_soc_codec *codec = codec_dai->codec;
struct snd_soc_dapm_context *dapm = &codec->dapm;
struct snd_soc_card *card = codec->card;
struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
if (gpio_is_valid(machine->gpio_hp_det)) {
tegra_wm8903_hp_jack_gpio.gpio = machine->gpio_hp_det;
snd_soc_jack_new(codec, "Headphone Jack", SND_JACK_HEADPHONE,
&tegra_wm8903_hp_jack);
snd_soc_jack_add_pins(&tegra_wm8903_hp_jack,
ARRAY_SIZE(tegra_wm8903_hp_jack_pins),
tegra_wm8903_hp_jack_pins);
snd_soc_jack_add_gpios(&tegra_wm8903_hp_jack,
1,
&tegra_wm8903_hp_jack_gpio);
}
snd_soc_jack_new(codec, "Mic Jack", SND_JACK_MICROPHONE,
&tegra_wm8903_mic_jack);
snd_soc_jack_add_pins(&tegra_wm8903_mic_jack,
ARRAY_SIZE(tegra_wm8903_mic_jack_pins),
tegra_wm8903_mic_jack_pins);
wm8903_mic_detect(codec, &tegra_wm8903_mic_jack, SND_JACK_MICROPHONE,
0);
snd_soc_dapm_force_enable_pin(dapm, "MICBIAS");
return 0;
}
static int tegra_wm8903_remove(struct snd_soc_card *card)
{
struct snd_soc_pcm_runtime *rtd = &(card->rtd[0]);
struct snd_soc_dai *codec_dai = rtd->codec_dai;
struct snd_soc_codec *codec = codec_dai->codec;
struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
if (gpio_is_valid(machine->gpio_hp_det)) {
snd_soc_jack_free_gpios(&tegra_wm8903_hp_jack, 1,
&tegra_wm8903_hp_jack_gpio);
}
wm8903_mic_detect(codec, NULL, 0, 0);
return 0;
}
static struct snd_soc_dai_link tegra_wm8903_dai = {
.name = "WM8903",
.stream_name = "WM8903 PCM",
.codec_dai_name = "wm8903-hifi",
.init = tegra_wm8903_init,
.ops = &tegra_wm8903_ops,
.dai_fmt = SND_SOC_DAIFMT_I2S |
SND_SOC_DAIFMT_NB_NF |
SND_SOC_DAIFMT_CBS_CFS,
};
static struct snd_soc_card snd_soc_tegra_wm8903 = {
.name = "tegra-wm8903",
.owner = THIS_MODULE,
.dai_link = &tegra_wm8903_dai,
.num_links = 1,
.remove = tegra_wm8903_remove,
.controls = tegra_wm8903_controls,
.num_controls = ARRAY_SIZE(tegra_wm8903_controls),
.dapm_widgets = tegra_wm8903_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(tegra_wm8903_dapm_widgets),
.fully_routed = true,
};
static int tegra_wm8903_driver_probe(struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
struct snd_soc_card *card = &snd_soc_tegra_wm8903;
struct tegra_wm8903 *machine;
int ret;
machine = devm_kzalloc(&pdev->dev, sizeof(struct tegra_wm8903),
GFP_KERNEL);
if (!machine) {
dev_err(&pdev->dev, "Can't allocate tegra_wm8903 struct\n");
return -ENOMEM;
}
card->dev = &pdev->dev;
platform_set_drvdata(pdev, card);
snd_soc_card_set_drvdata(card, machine);
machine->gpio_spkr_en = of_get_named_gpio(np, "nvidia,spkr-en-gpios",
0);
if (machine->gpio_spkr_en == -EPROBE_DEFER)
return -EPROBE_DEFER;
if (gpio_is_valid(machine->gpio_spkr_en)) {
ret = devm_gpio_request_one(&pdev->dev, machine->gpio_spkr_en,
GPIOF_OUT_INIT_LOW, "spkr_en");
if (ret) {
dev_err(card->dev, "cannot get spkr_en gpio\n");
return ret;
}
}
machine->gpio_hp_mute = of_get_named_gpio(np, "nvidia,hp-mute-gpios",
0);
if (machine->gpio_hp_mute == -EPROBE_DEFER)
return -EPROBE_DEFER;
if (gpio_is_valid(machine->gpio_hp_mute)) {
ret = devm_gpio_request_one(&pdev->dev, machine->gpio_hp_mute,
GPIOF_OUT_INIT_HIGH, "hp_mute");
if (ret) {
dev_err(card->dev, "cannot get hp_mute gpio\n");
return ret;
}
}
machine->gpio_hp_det = of_get_named_gpio(np, "nvidia,hp-det-gpios", 0);
if (machine->gpio_hp_det == -EPROBE_DEFER)
return -EPROBE_DEFER;
machine->gpio_int_mic_en = of_get_named_gpio(np,
"nvidia,int-mic-en-gpios", 0);
if (machine->gpio_int_mic_en == -EPROBE_DEFER)
return -EPROBE_DEFER;
if (gpio_is_valid(machine->gpio_int_mic_en)) {
/* Disable int mic; enable signal is active-high */
ret = devm_gpio_request_one(&pdev->dev,
machine->gpio_int_mic_en,
GPIOF_OUT_INIT_LOW, "int_mic_en");
if (ret) {
dev_err(card->dev, "cannot get int_mic_en gpio\n");
return ret;
}
}
machine->gpio_ext_mic_en = of_get_named_gpio(np,
"nvidia,ext-mic-en-gpios", 0);
if (machine->gpio_ext_mic_en == -EPROBE_DEFER)
return -EPROBE_DEFER;
if (gpio_is_valid(machine->gpio_ext_mic_en)) {
/* Enable ext mic; enable signal is active-low */
ret = devm_gpio_request_one(&pdev->dev,
machine->gpio_ext_mic_en,
GPIOF_OUT_INIT_LOW, "ext_mic_en");
if (ret) {
dev_err(card->dev, "cannot get ext_mic_en gpio\n");
return ret;
}
}
ret = snd_soc_of_parse_card_name(card, "nvidia,model");
if (ret)
goto err;
ret = snd_soc_of_parse_audio_routing(card, "nvidia,audio-routing");
if (ret)
goto err;
tegra_wm8903_dai.codec_of_node = of_parse_phandle(np,
"nvidia,audio-codec", 0);
if (!tegra_wm8903_dai.codec_of_node) {
dev_err(&pdev->dev,
"Property 'nvidia,audio-codec' missing or invalid\n");
ret = -EINVAL;
goto err;
}
tegra_wm8903_dai.cpu_of_node = of_parse_phandle(np,
"nvidia,i2s-controller", 0);
if (!tegra_wm8903_dai.cpu_of_node) {
dev_err(&pdev->dev,
"Property 'nvidia,i2s-controller' missing or invalid\n");
ret = -EINVAL;
goto err;
}
tegra_wm8903_dai.platform_of_node = tegra_wm8903_dai.cpu_of_node;
ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev);
if (ret)
goto err;
ret = snd_soc_register_card(card);
if (ret) {
dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
ret);
goto err_fini_utils;
}
return 0;
err_fini_utils:
tegra_asoc_utils_fini(&machine->util_data);
err:
return ret;
}
static int tegra_wm8903_driver_remove(struct platform_device *pdev)
{
struct snd_soc_card *card = platform_get_drvdata(pdev);
struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
snd_soc_unregister_card(card);
tegra_asoc_utils_fini(&machine->util_data);
return 0;
}
static const struct of_device_id tegra_wm8903_of_match[] = {
{ .compatible = "nvidia,tegra-audio-wm8903", },
{},
};
static struct platform_driver tegra_wm8903_driver = {
.driver = {
.name = DRV_NAME,
.owner = THIS_MODULE,
.pm = &snd_soc_pm_ops,
.of_match_table = tegra_wm8903_of_match,
},
.probe = tegra_wm8903_driver_probe,
.remove = tegra_wm8903_driver_remove,
};
module_platform_driver(tegra_wm8903_driver);
MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
MODULE_DESCRIPTION("Tegra+WM8903 machine ASoC driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:" DRV_NAME);
MODULE_DEVICE_TABLE(of, tegra_wm8903_of_match);