sound/soc/pxa/tosa.c - linux - Git at Google

 /*
  * tosa.c  --  SoC audio for Tosa
  *
  * Copyright 2005 Wolfson Microelectronics PLC.
  * Copyright 2005 Openedhand Ltd.
  *
  * Authors: Liam Girdwood <lrg@slimlogic.co.uk>
  *          Richard Purdie <richard@openedhand.com>
  *
  *  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.
  *
  * GPIO's
  *  1 - Jack Insertion
  *  5 - Hookswitch (headset answer/hang up switch)
  *
  */

 #include <linux/module.h>
 #include <linux/moduleparam.h>
 #include <linux/device.h>
 #include <linux/gpio.h>

 #include <sound/core.h>
 #include <sound/pcm.h>
 #include <sound/soc.h>

 #include <asm/mach-types.h>
 #include <mach/tosa.h>
 #include <mach/audio.h>

 #define TOSA_HP        0
 #define TOSA_MIC_INT   1
 #define TOSA_HEADSET   2
 #define TOSA_HP_OFF    3
 #define TOSA_SPK_ON    0
 #define TOSA_SPK_OFF   1

 static int tosa_jack_func;
 static int tosa_spk_func;

 static void tosa_ext_control(struct snd_soc_dapm_context *dapm)
 {

 	snd_soc_dapm_mutex_lock(dapm);

 	/* set up jack connection */
 	switch (tosa_jack_func) {
 	case TOSA_HP:
 		snd_soc_dapm_disable_pin_unlocked(dapm, "Mic (Internal)");
 		snd_soc_dapm_enable_pin_unlocked(dapm, "Headphone Jack");
 		snd_soc_dapm_disable_pin_unlocked(dapm, "Headset Jack");
 		break;
 	case TOSA_MIC_INT:
 		snd_soc_dapm_enable_pin_unlocked(dapm, "Mic (Internal)");
 		snd_soc_dapm_disable_pin_unlocked(dapm, "Headphone Jack");
 		snd_soc_dapm_disable_pin_unlocked(dapm, "Headset Jack");
 		break;
 	case TOSA_HEADSET:
 		snd_soc_dapm_disable_pin_unlocked(dapm, "Mic (Internal)");
 		snd_soc_dapm_disable_pin_unlocked(dapm, "Headphone Jack");
 		snd_soc_dapm_enable_pin_unlocked(dapm, "Headset Jack");
 		break;
 	}

 	if (tosa_spk_func == TOSA_SPK_ON)
 		snd_soc_dapm_enable_pin_unlocked(dapm, "Speaker");
 	else
 		snd_soc_dapm_disable_pin_unlocked(dapm, "Speaker");

 	snd_soc_dapm_sync_unlocked(dapm);

 	snd_soc_dapm_mutex_unlock(dapm);
 }

 static int tosa_startup(struct snd_pcm_substream *substream)
 {
 	struct snd_soc_pcm_runtime *rtd = substream->private_data;

 	/* check the jack status at stream startup */
 	tosa_ext_control(&rtd->card->dapm);

 	return 0;
 }

 static struct snd_soc_ops tosa_ops = {
 	.startup = tosa_startup,
 };

 static int tosa_get_jack(struct snd_kcontrol *kcontrol,
 	struct snd_ctl_elem_value *ucontrol)
 {
 	ucontrol->value.enumerated.item[0] = tosa_jack_func;
 	return 0;
 }

 static int tosa_set_jack(struct snd_kcontrol *kcontrol,
 	struct snd_ctl_elem_value *ucontrol)
 {
 	struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);

 	if (tosa_jack_func == ucontrol->value.enumerated.item[0])
 		return 0;

 	tosa_jack_func = ucontrol->value.enumerated.item[0];
 	tosa_ext_control(&card->dapm);
 	return 1;
 }

 static int tosa_get_spk(struct snd_kcontrol *kcontrol,
 	struct snd_ctl_elem_value *ucontrol)
 {
 	ucontrol->value.enumerated.item[0] = tosa_spk_func;
 	return 0;
 }

 static int tosa_set_spk(struct snd_kcontrol *kcontrol,
 	struct snd_ctl_elem_value *ucontrol)
 {
 	struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);

 	if (tosa_spk_func == ucontrol->value.enumerated.item[0])
 		return 0;

 	tosa_spk_func = ucontrol->value.enumerated.item[0];
 	tosa_ext_control(&card->dapm);
 	return 1;
 }

 /* tosa dapm event handlers */
 static int tosa_hp_event(struct snd_soc_dapm_widget *w,
 	struct snd_kcontrol *k, int event)
 {
 	gpio_set_value(TOSA_GPIO_L_MUTE, SND_SOC_DAPM_EVENT_ON(event) ? 1 :0);
 	return 0;
 }

 /* tosa machine dapm widgets */
 static const struct snd_soc_dapm_widget tosa_dapm_widgets[] = {
 SND_SOC_DAPM_HP("Headphone Jack", tosa_hp_event),
 SND_SOC_DAPM_HP("Headset Jack", NULL),
 SND_SOC_DAPM_MIC("Mic (Internal)", NULL),
 SND_SOC_DAPM_SPK("Speaker", NULL),
 };

 /* tosa audio map */
 static const struct snd_soc_dapm_route audio_map[] = {

 	/* headphone connected to HPOUTL, HPOUTR */
 	{"Headphone Jack", NULL, "HPOUTL"},
 	{"Headphone Jack", NULL, "HPOUTR"},

 	/* ext speaker connected to LOUT2, ROUT2 */
 	{"Speaker", NULL, "LOUT2"},
 	{"Speaker", NULL, "ROUT2"},

 	/* internal mic is connected to mic1, mic2 differential - with bias */
 	{"MIC1", NULL, "Mic Bias"},
 	{"MIC2", NULL, "Mic Bias"},
 	{"Mic Bias", NULL, "Mic (Internal)"},

 	/* headset is connected to HPOUTR, and LINEINR with bias */
 	{"Headset Jack", NULL, "HPOUTR"},
 	{"LINEINR", NULL, "Mic Bias"},
 	{"Mic Bias", NULL, "Headset Jack"},
 };

 static const char * const jack_function[] = {"Headphone", "Mic", "Line",
 	"Headset", "Off"};
 static const char * const spk_function[] = {"On", "Off"};
 static const struct soc_enum tosa_enum[] = {
 	SOC_ENUM_SINGLE_EXT(5, jack_function),
 	SOC_ENUM_SINGLE_EXT(2, spk_function),
 };

 static const struct snd_kcontrol_new tosa_controls[] = {
 	SOC_ENUM_EXT("Jack Function", tosa_enum[0], tosa_get_jack,
 		tosa_set_jack),
 	SOC_ENUM_EXT("Speaker Function", tosa_enum[1], tosa_get_spk,
 		tosa_set_spk),
 };

 static struct snd_soc_dai_link tosa_dai[] = {
 {
 	.name = "AC97",
 	.stream_name = "AC97 HiFi",
 	.cpu_dai_name = "pxa2xx-ac97",
 	.codec_dai_name = "wm9712-hifi",
 	.platform_name = "pxa-pcm-audio",
 	.codec_name = "wm9712-codec",
 	.ops = &tosa_ops,
 },
 {
 	.name = "AC97 Aux",
 	.stream_name = "AC97 Aux",
 	.cpu_dai_name = "pxa2xx-ac97-aux",
 	.codec_dai_name = "wm9712-aux",
 	.platform_name = "pxa-pcm-audio",
 	.codec_name = "wm9712-codec",
 	.ops = &tosa_ops,
 },
 };

 static struct snd_soc_card tosa = {
 	.name = "Tosa",
 	.owner = THIS_MODULE,
 	.dai_link = tosa_dai,
 	.num_links = ARRAY_SIZE(tosa_dai),

 	.controls = tosa_controls,
 	.num_controls = ARRAY_SIZE(tosa_controls),
 	.dapm_widgets = tosa_dapm_widgets,
 	.num_dapm_widgets = ARRAY_SIZE(tosa_dapm_widgets),
 	.dapm_routes = audio_map,
 	.num_dapm_routes = ARRAY_SIZE(audio_map),
 	.fully_routed = true,
 };

 static int tosa_probe(struct platform_device *pdev)
 {
 	struct snd_soc_card *card = &tosa;
 	int ret;

 	ret = gpio_request_one(TOSA_GPIO_L_MUTE, GPIOF_OUT_INIT_LOW,
 			       "Headphone Jack");
 	if (ret)
 		return ret;

 	card->dev = &pdev->dev;

 	ret = devm_snd_soc_register_card(&pdev->dev, card);
 	if (ret) {
 		dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
 			ret);
 		gpio_free(TOSA_GPIO_L_MUTE);
 	}
 	return ret;
 }

 static int tosa_remove(struct platform_device *pdev)
 {
 	gpio_free(TOSA_GPIO_L_MUTE);
 	return 0;
 }

 static struct platform_driver tosa_driver = {
 	.driver		= {
 		.name	= "tosa-audio",
 		.pm     = &snd_soc_pm_ops,
 	},
 	.probe		= tosa_probe,
 	.remove		= tosa_remove,
 };

 module_platform_driver(tosa_driver);

 /* Module information */
 MODULE_AUTHOR("Richard Purdie");
 MODULE_DESCRIPTION("ALSA SoC Tosa");
 MODULE_LICENSE("GPL");
 MODULE_ALIAS("platform:tosa-audio");
	/*
	* tosa.c -- SoC audio for Tosa
	*
	* Copyright 2005 Wolfson Microelectronics PLC.
	* Copyright 2005 Openedhand Ltd.
	*
	* Authors: Liam Girdwood <lrg@slimlogic.co.uk>
	* Richard Purdie <richard@openedhand.com>
	*
	* 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.
	*
	* GPIO's
	* 1 - Jack Insertion
	* 5 - Hookswitch (headset answer/hang up switch)
	*
	*/

	#include <linux/module.h>
	#include <linux/moduleparam.h>
	#include <linux/device.h>
	#include <linux/gpio.h>

	#include <sound/core.h>
	#include <sound/pcm.h>
	#include <sound/soc.h>

	#include <asm/mach-types.h>
	#include <mach/tosa.h>
	#include <mach/audio.h>

	#define TOSA_HP 0
	#define TOSA_MIC_INT 1
	#define TOSA_HEADSET 2
	#define TOSA_HP_OFF 3
	#define TOSA_SPK_ON 0
	#define TOSA_SPK_OFF 1

	static int tosa_jack_func;
	static int tosa_spk_func;

	static void tosa_ext_control(struct snd_soc_dapm_context *dapm)
	{

	snd_soc_dapm_mutex_lock(dapm);

	/* set up jack connection */
	switch (tosa_jack_func) {
	case TOSA_HP:
	snd_soc_dapm_disable_pin_unlocked(dapm, "Mic (Internal)");
	snd_soc_dapm_enable_pin_unlocked(dapm, "Headphone Jack");
	snd_soc_dapm_disable_pin_unlocked(dapm, "Headset Jack");
	break;
	case TOSA_MIC_INT:
	snd_soc_dapm_enable_pin_unlocked(dapm, "Mic (Internal)");
	snd_soc_dapm_disable_pin_unlocked(dapm, "Headphone Jack");
	snd_soc_dapm_disable_pin_unlocked(dapm, "Headset Jack");
	break;
	case TOSA_HEADSET:
	snd_soc_dapm_disable_pin_unlocked(dapm, "Mic (Internal)");
	snd_soc_dapm_disable_pin_unlocked(dapm, "Headphone Jack");
	snd_soc_dapm_enable_pin_unlocked(dapm, "Headset Jack");
	break;
	}

	if (tosa_spk_func == TOSA_SPK_ON)
	snd_soc_dapm_enable_pin_unlocked(dapm, "Speaker");
	else
	snd_soc_dapm_disable_pin_unlocked(dapm, "Speaker");

	snd_soc_dapm_sync_unlocked(dapm);

	snd_soc_dapm_mutex_unlock(dapm);
	}

	static int tosa_startup(struct snd_pcm_substream *substream)
	{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;

	/* check the jack status at stream startup */
	tosa_ext_control(&rtd->card->dapm);

	return 0;
	}

	static struct snd_soc_ops tosa_ops = {
	.startup = tosa_startup,
	};

	static int tosa_get_jack(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
	{
	ucontrol->value.enumerated.item[0] = tosa_jack_func;
	return 0;
	}

	static int tosa_set_jack(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
	{
	struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);

	if (tosa_jack_func == ucontrol->value.enumerated.item[0])
	return 0;

	tosa_jack_func = ucontrol->value.enumerated.item[0];
	tosa_ext_control(&card->dapm);
	return 1;
	}

	static int tosa_get_spk(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
	{
	ucontrol->value.enumerated.item[0] = tosa_spk_func;
	return 0;
	}

	static int tosa_set_spk(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
	{
	struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);

	if (tosa_spk_func == ucontrol->value.enumerated.item[0])
	return 0;

	tosa_spk_func = ucontrol->value.enumerated.item[0];
	tosa_ext_control(&card->dapm);
	return 1;
	}

	/* tosa dapm event handlers */
	static int tosa_hp_event(struct snd_soc_dapm_widget *w,
	struct snd_kcontrol *k, int event)
	{
	gpio_set_value(TOSA_GPIO_L_MUTE, SND_SOC_DAPM_EVENT_ON(event) ? 1 :0);
	return 0;
	}

	/* tosa machine dapm widgets */
	static const struct snd_soc_dapm_widget tosa_dapm_widgets[] = {
	SND_SOC_DAPM_HP("Headphone Jack", tosa_hp_event),
	SND_SOC_DAPM_HP("Headset Jack", NULL),
	SND_SOC_DAPM_MIC("Mic (Internal)", NULL),
	SND_SOC_DAPM_SPK("Speaker", NULL),
	};

	/* tosa audio map */
	static const struct snd_soc_dapm_route audio_map[] = {

	/* headphone connected to HPOUTL, HPOUTR */
	{"Headphone Jack", NULL, "HPOUTL"},
	{"Headphone Jack", NULL, "HPOUTR"},

	/* ext speaker connected to LOUT2, ROUT2 */
	{"Speaker", NULL, "LOUT2"},
	{"Speaker", NULL, "ROUT2"},

	/* internal mic is connected to mic1, mic2 differential - with bias */
	{"MIC1", NULL, "Mic Bias"},
	{"MIC2", NULL, "Mic Bias"},
	{"Mic Bias", NULL, "Mic (Internal)"},

	/* headset is connected to HPOUTR, and LINEINR with bias */
	{"Headset Jack", NULL, "HPOUTR"},
	{"LINEINR", NULL, "Mic Bias"},
	{"Mic Bias", NULL, "Headset Jack"},
	};

	static const char * const jack_function[] = {"Headphone", "Mic", "Line",
	"Headset", "Off"};
	static const char * const spk_function[] = {"On", "Off"};
	static const struct soc_enum tosa_enum[] = {
	SOC_ENUM_SINGLE_EXT(5, jack_function),
	SOC_ENUM_SINGLE_EXT(2, spk_function),
	};

	static const struct snd_kcontrol_new tosa_controls[] = {
	SOC_ENUM_EXT("Jack Function", tosa_enum[0], tosa_get_jack,
	tosa_set_jack),
	SOC_ENUM_EXT("Speaker Function", tosa_enum[1], tosa_get_spk,
	tosa_set_spk),
	};

	static struct snd_soc_dai_link tosa_dai[] = {
	{
	.name = "AC97",
	.stream_name = "AC97 HiFi",
	.cpu_dai_name = "pxa2xx-ac97",
	.codec_dai_name = "wm9712-hifi",
	.platform_name = "pxa-pcm-audio",
	.codec_name = "wm9712-codec",
	.ops = &tosa_ops,
	},
	{
	.name = "AC97 Aux",
	.stream_name = "AC97 Aux",
	.cpu_dai_name = "pxa2xx-ac97-aux",
	.codec_dai_name = "wm9712-aux",
	.platform_name = "pxa-pcm-audio",
	.codec_name = "wm9712-codec",
	.ops = &tosa_ops,
	},
	};

	static struct snd_soc_card tosa = {
	.name = "Tosa",
	.owner = THIS_MODULE,
	.dai_link = tosa_dai,
	.num_links = ARRAY_SIZE(tosa_dai),

	.controls = tosa_controls,
	.num_controls = ARRAY_SIZE(tosa_controls),
	.dapm_widgets = tosa_dapm_widgets,
	.num_dapm_widgets = ARRAY_SIZE(tosa_dapm_widgets),
	.dapm_routes = audio_map,
	.num_dapm_routes = ARRAY_SIZE(audio_map),
	.fully_routed = true,
	};

	static int tosa_probe(struct platform_device *pdev)
	{
	struct snd_soc_card *card = &tosa;
	int ret;

	ret = gpio_request_one(TOSA_GPIO_L_MUTE, GPIOF_OUT_INIT_LOW,
	"Headphone Jack");
	if (ret)
	return ret;

	card->dev = &pdev->dev;

	ret = devm_snd_soc_register_card(&pdev->dev, card);
	if (ret) {
	dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
	ret);
	gpio_free(TOSA_GPIO_L_MUTE);
	}
	return ret;
	}

	static int tosa_remove(struct platform_device *pdev)
	{
	gpio_free(TOSA_GPIO_L_MUTE);
	return 0;
	}

	static struct platform_driver tosa_driver = {
	.driver = {
	.name = "tosa-audio",
	.pm = &snd_soc_pm_ops,
	},
	.probe = tosa_probe,
	.remove = tosa_remove,
	};

	module_platform_driver(tosa_driver);

	/* Module information */
	MODULE_AUTHOR("Richard Purdie");
	MODULE_DESCRIPTION("ALSA SoC Tosa");
	MODULE_LICENSE("GPL");
	MODULE_ALIAS("platform:tosa-audio");