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/* sound/soc/samsung/smartq_wm8987.c
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* Copyright 2010 Maurus Cuelenaere <mcuelenaere@gmail.com>
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* Based on smdk6410_wm8987.c
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* Copyright 2007 Wolfson Microelectronics PLC. - linux@wolfsonmicro.com
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* Graeme Gregory - graeme.gregory@wolfsonmicro.com
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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#include <linux/gpio.h>
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#include <linux/module.h>
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#include <sound/soc.h>
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#include <sound/jack.h>
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#include <asm/mach-types.h>
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#include "../codecs/wm8750.h"
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* WM8987 is register compatible with WM8750, so using that as base driver.
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static struct snd_soc_card snd_soc_smartq;
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static int smartq_hifi_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params)
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct snd_soc_dai *codec_dai = rtd->codec_dai;
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struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
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switch (params_rate(params)) {
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/* set codec DAI configuration */
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ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
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SND_SOC_DAIFMT_NB_NF |
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SND_SOC_DAIFMT_CBS_CFS);
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/* set cpu DAI configuration */
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ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
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SND_SOC_DAIFMT_NB_NF |
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SND_SOC_DAIFMT_CBS_CFS);
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/* Use PCLK for I2S signal generation */
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ret = snd_soc_dai_set_sysclk(cpu_dai, SAMSUNG_I2S_RCLKSRC_0,
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/* Gate the RCLK output on PAD */
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ret = snd_soc_dai_set_sysclk(cpu_dai, SAMSUNG_I2S_CDCLK,
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/* set the codec system clock for DAC and ADC */
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ret = snd_soc_dai_set_sysclk(codec_dai, WM8750_SYSCLK, clk,
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* SmartQ WM8987 HiFi DAI operations.
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static struct snd_soc_ops smartq_hifi_ops = {
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.hw_params = smartq_hifi_hw_params,
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static struct snd_soc_jack smartq_jack;
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static struct snd_soc_jack_pin smartq_jack_pins[] = {
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/* Disable speaker when headphone is plugged in */
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.pin = "Internal Speaker",
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.mask = SND_JACK_HEADPHONE,
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static struct snd_soc_jack_gpio smartq_jack_gpios[] = {
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.gpio = S3C64XX_GPL(12),
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.name = "headphone detect",
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.report = SND_JACK_HEADPHONE,
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.debounce_time = 200,
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static const struct snd_kcontrol_new wm8987_smartq_controls[] = {
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SOC_DAPM_PIN_SWITCH("Internal Speaker"),
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SOC_DAPM_PIN_SWITCH("Headphone Jack"),
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SOC_DAPM_PIN_SWITCH("Internal Mic"),
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static int smartq_speaker_event(struct snd_soc_dapm_widget *w,
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struct snd_kcontrol *k,
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gpio_set_value(S3C64XX_GPK(12), SND_SOC_DAPM_EVENT_OFF(event));
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static const struct snd_soc_dapm_widget wm8987_dapm_widgets[] = {
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SND_SOC_DAPM_SPK("Internal Speaker", smartq_speaker_event),
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SND_SOC_DAPM_HP("Headphone Jack", NULL),
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SND_SOC_DAPM_MIC("Internal Mic", NULL),
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static const struct snd_soc_dapm_route audio_map[] = {
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{"Headphone Jack", NULL, "LOUT2"},
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{"Headphone Jack", NULL, "ROUT2"},
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{"Internal Speaker", NULL, "LOUT2"},
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{"Internal Speaker", NULL, "ROUT2"},
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{"Mic Bias", NULL, "Internal Mic"},
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{"LINPUT2", NULL, "Mic Bias"},
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static int smartq_wm8987_init(struct snd_soc_pcm_runtime *rtd)
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struct snd_soc_codec *codec = rtd->codec;
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struct snd_soc_dapm_context *dapm = &codec->dapm;
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/* set endpoints to not connected */
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snd_soc_dapm_nc_pin(dapm, "LINPUT1");
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snd_soc_dapm_nc_pin(dapm, "RINPUT1");
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snd_soc_dapm_nc_pin(dapm, "OUT3");
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snd_soc_dapm_nc_pin(dapm, "ROUT1");
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/* set endpoints to default off mode */
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snd_soc_dapm_enable_pin(dapm, "Internal Speaker");
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snd_soc_dapm_enable_pin(dapm, "Internal Mic");
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snd_soc_dapm_disable_pin(dapm, "Headphone Jack");
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/* Headphone jack detection */
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err = snd_soc_jack_new(codec, "Headphone Jack",
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SND_JACK_HEADPHONE, &smartq_jack);
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err = snd_soc_jack_add_pins(&smartq_jack, ARRAY_SIZE(smartq_jack_pins),
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err = snd_soc_jack_add_gpios(&smartq_jack,
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ARRAY_SIZE(smartq_jack_gpios),
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static struct snd_soc_dai_link smartq_dai[] = {
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.stream_name = "SmartQ Hi-Fi",
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.cpu_dai_name = "samsung-i2s.0",
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.codec_dai_name = "wm8750-hifi",
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.platform_name = "samsung-audio",
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.codec_name = "wm8750.0-0x1a",
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.init = smartq_wm8987_init,
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.ops = &smartq_hifi_ops,
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static struct snd_soc_card snd_soc_smartq = {
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.dai_link = smartq_dai,
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.num_links = ARRAY_SIZE(smartq_dai),
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.dapm_widgets = wm8987_dapm_widgets,
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.num_dapm_widgets = ARRAY_SIZE(wm8987_dapm_widgets),
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.dapm_routes = audio_map,
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.num_dapm_routes = ARRAY_SIZE(audio_map),
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.controls = wm8987_smartq_controls,
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.num_controls = ARRAY_SIZE(wm8987_smartq_controls),
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static struct platform_device *smartq_snd_device;
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static int __init smartq_init(void)
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if (!machine_is_smartq7() && !machine_is_smartq5()) {
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pr_info("Only SmartQ is supported by this ASoC driver\n");
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smartq_snd_device = platform_device_alloc("soc-audio", -1);
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if (!smartq_snd_device)
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platform_set_drvdata(smartq_snd_device, &snd_soc_smartq);
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ret = platform_device_add(smartq_snd_device);
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platform_device_put(smartq_snd_device);
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/* Initialise GPIOs used by amplifiers */
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ret = gpio_request(S3C64XX_GPK(12), "amplifiers shutdown");
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dev_err(&smartq_snd_device->dev, "Failed to register GPK12\n");
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goto err_unregister_device;
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/* Disable amplifiers */
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ret = gpio_direction_output(S3C64XX_GPK(12), 1);
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dev_err(&smartq_snd_device->dev, "Failed to configure GPK12\n");
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goto err_free_gpio_amp_shut;
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err_free_gpio_amp_shut:
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gpio_free(S3C64XX_GPK(12));
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err_unregister_device:
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platform_device_unregister(smartq_snd_device);
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static void __exit smartq_exit(void)
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gpio_free(S3C64XX_GPK(12));
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snd_soc_jack_free_gpios(&smartq_jack, ARRAY_SIZE(smartq_jack_gpios),
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platform_device_unregister(smartq_snd_device);
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module_init(smartq_init);
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module_exit(smartq_exit);
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/* Module information */
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MODULE_AUTHOR("Maurus Cuelenaere <mcuelenaere@gmail.com>");
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MODULE_DESCRIPTION("ALSA SoC SmartQ WM8987");
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MODULE_LICENSE("GPL");