sound/pci/hda/hda_jack.c - third_party/kernel - Git at Google

 /*
  * Jack-detection handling for HD-audio
  *
  * Copyright (c) 2011 Takashi Iwai <tiwai@suse.de>
  *
  * This driver 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.
  */

 #include <linux/init.h>
 #include <linux/slab.h>
 #include <linux/export.h>
 #include <sound/core.h>
 #include <sound/control.h>
 #include <sound/jack.h>
 #include "hda_codec.h"
 #include "hda_local.h"
 #include "hda_auto_parser.h"
 #include "hda_jack.h"

 /**
  * is_jack_detectable - Check whether the given pin is jack-detectable
  * @codec: the HDA codec
  * @nid: pin NID
  *
  * Check whether the given pin is capable to report the jack detection.
  * The jack detection might not work by various reasons, e.g. the jack
  * detection is prohibited in the codec level, the pin config has
  * AC_DEFCFG_MISC_NO_PRESENCE bit, no unsol support, etc.
  */
 bool is_jack_detectable(struct hda_codec *codec, hda_nid_t nid)
 {
 	if (codec->no_jack_detect)
 		return false;
 	if (!(snd_hda_query_pin_caps(codec, nid) & AC_PINCAP_PRES_DETECT))
 		return false;
 	if (get_defcfg_misc(snd_hda_codec_get_pincfg(codec, nid)) &
 	     AC_DEFCFG_MISC_NO_PRESENCE)
 		return false;
 	if (!(get_wcaps(codec, nid) & AC_WCAP_UNSOL_CAP) &&
 	    !codec->jackpoll_interval)
 		return false;
 	return true;
 }
 EXPORT_SYMBOL_GPL(is_jack_detectable);

 /* execute pin sense measurement */
 static u32 read_pin_sense(struct hda_codec *codec, hda_nid_t nid)
 {
 	u32 pincap;
 	u32 val;

 	if (!codec->no_trigger_sense) {
 		pincap = snd_hda_query_pin_caps(codec, nid);
 		if (pincap & AC_PINCAP_TRIG_REQ) /* need trigger? */
 			snd_hda_codec_read(codec, nid, 0,
 					AC_VERB_SET_PIN_SENSE, 0);
 	}
 	val = snd_hda_codec_read(codec, nid, 0,
 				  AC_VERB_GET_PIN_SENSE, 0);
 	if (codec->inv_jack_detect)
 		val ^= AC_PINSENSE_PRESENCE;
 	return val;
 }

 /**
  * snd_hda_jack_tbl_get - query the jack-table entry for the given NID
  * @codec: the HDA codec
  * @nid: pin NID to refer to
  */
 struct hda_jack_tbl *
 snd_hda_jack_tbl_get(struct hda_codec *codec, hda_nid_t nid)
 {
 	struct hda_jack_tbl *jack = codec->jacktbl.list;
 	int i;

 	if (!nid || !jack)
 		return NULL;
 	for (i = 0; i < codec->jacktbl.used; i++, jack++)
 		if (jack->nid == nid)
 			return jack;
 	return NULL;
 }
 EXPORT_SYMBOL_GPL(snd_hda_jack_tbl_get);

 /**
  * snd_hda_jack_tbl_get_from_tag - query the jack-table entry for the given tag
  * @codec: the HDA codec
  * @tag: tag value to refer to
  */
 struct hda_jack_tbl *
 snd_hda_jack_tbl_get_from_tag(struct hda_codec *codec, unsigned char tag)
 {
 	struct hda_jack_tbl *jack = codec->jacktbl.list;
 	int i;

 	if (!tag || !jack)
 		return NULL;
 	for (i = 0; i < codec->jacktbl.used; i++, jack++)
 		if (jack->tag == tag)
 			return jack;
 	return NULL;
 }
 EXPORT_SYMBOL_GPL(snd_hda_jack_tbl_get_from_tag);

 /**
  * snd_hda_jack_tbl_new - create a jack-table entry for the given NID
  * @codec: the HDA codec
  * @nid: pin NID to assign
  */
 static struct hda_jack_tbl *
 snd_hda_jack_tbl_new(struct hda_codec *codec, hda_nid_t nid)
 {
 	struct hda_jack_tbl *jack = snd_hda_jack_tbl_get(codec, nid);
 	if (jack)
 		return jack;
 	jack = snd_array_new(&codec->jacktbl);
 	if (!jack)
 		return NULL;
 	jack->nid = nid;
 	jack->jack_dirty = 1;
 	jack->tag = codec->jacktbl.used;
 	return jack;
 }

 void snd_hda_jack_tbl_clear(struct hda_codec *codec)
 {
 	struct hda_jack_tbl *jack = codec->jacktbl.list;
 	int i;

 	for (i = 0; i < codec->jacktbl.used; i++, jack++) {
 		struct hda_jack_callback *cb, *next;

 		/* free jack instances manually when clearing/reconfiguring */
 		if (!codec->bus->shutdown && jack->jack)
 			snd_device_free(codec->card, jack->jack);

 		for (cb = jack->callback; cb; cb = next) {
 			next = cb->next;
 			kfree(cb);
 		}
 	}
 	snd_array_free(&codec->jacktbl);
 }

 #define get_jack_plug_state(sense) !!(sense & AC_PINSENSE_PRESENCE)

 /* update the cached value and notification flag if needed */
 static void jack_detect_update(struct hda_codec *codec,
 			       struct hda_jack_tbl *jack)
 {
 	if (!jack->jack_dirty)
 		return;

 	if (jack->phantom_jack)
 		jack->pin_sense = AC_PINSENSE_PRESENCE;
 	else
 		jack->pin_sense = read_pin_sense(codec, jack->nid);

 	/* A gating jack indicates the jack is invalid if gating is unplugged */
 	if (jack->gating_jack && !snd_hda_jack_detect(codec, jack->gating_jack))
 		jack->pin_sense &= ~AC_PINSENSE_PRESENCE;

 	jack->jack_dirty = 0;

 	/* If a jack is gated by this one update it. */
 	if (jack->gated_jack) {
 		struct hda_jack_tbl *gated =
 			snd_hda_jack_tbl_get(codec, jack->gated_jack);
 		if (gated) {
 			gated->jack_dirty = 1;
 			jack_detect_update(codec, gated);
 		}
 	}
 }

 /**
  * snd_hda_set_dirty_all - Mark all the cached as dirty
  * @codec: the HDA codec
  *
  * This function sets the dirty flag to all entries of jack table.
  * It's called from the resume path in hda_codec.c.
  */
 void snd_hda_jack_set_dirty_all(struct hda_codec *codec)
 {
 	struct hda_jack_tbl *jack = codec->jacktbl.list;
 	int i;

 	for (i = 0; i < codec->jacktbl.used; i++, jack++)
 		if (jack->nid)
 			jack->jack_dirty = 1;
 }
 EXPORT_SYMBOL_GPL(snd_hda_jack_set_dirty_all);

 /**
  * snd_hda_pin_sense - execute pin sense measurement
  * @codec: the CODEC to sense
  * @nid: the pin NID to sense
  *
  * Execute necessary pin sense measurement and return its Presence Detect,
  * Impedance, ELD Valid etc. status bits.
  */
 u32 snd_hda_pin_sense(struct hda_codec *codec, hda_nid_t nid)
 {
 	struct hda_jack_tbl *jack = snd_hda_jack_tbl_get(codec, nid);
 	if (jack) {
 		jack_detect_update(codec, jack);
 		return jack->pin_sense;
 	}
 	return read_pin_sense(codec, nid);
 }
 EXPORT_SYMBOL_GPL(snd_hda_pin_sense);

 /**
  * snd_hda_jack_detect_state - query pin Presence Detect status
  * @codec: the CODEC to sense
  * @nid: the pin NID to sense
  *
  * Query and return the pin's Presence Detect status, as either
  * HDA_JACK_NOT_PRESENT, HDA_JACK_PRESENT or HDA_JACK_PHANTOM.
  */
 int snd_hda_jack_detect_state(struct hda_codec *codec, hda_nid_t nid)
 {
 	struct hda_jack_tbl *jack = snd_hda_jack_tbl_get(codec, nid);
 	if (jack && jack->phantom_jack)
 		return HDA_JACK_PHANTOM;
 	else if (snd_hda_pin_sense(codec, nid) & AC_PINSENSE_PRESENCE)
 		return HDA_JACK_PRESENT;
 	else
 		return HDA_JACK_NOT_PRESENT;
 }
 EXPORT_SYMBOL_GPL(snd_hda_jack_detect_state);

 /**
  * snd_hda_jack_detect_enable - enable the jack-detection
  * @codec: the HDA codec
  * @nid: pin NID to enable
  * @func: callback function to register
  *
  * In the case of error, the return value will be a pointer embedded with
  * errno.  Check and handle the return value appropriately with standard
  * macros such as @IS_ERR() and @PTR_ERR().
  */
 struct hda_jack_callback *
 snd_hda_jack_detect_enable_callback(struct hda_codec *codec, hda_nid_t nid,
 				    hda_jack_callback_fn func)
 {
 	struct hda_jack_tbl *jack;
 	struct hda_jack_callback *callback = NULL;
 	int err;

 	jack = snd_hda_jack_tbl_new(codec, nid);
 	if (!jack)
 		return ERR_PTR(-ENOMEM);
 	if (func) {
 		callback = kzalloc(sizeof(*callback), GFP_KERNEL);
 		if (!callback)
 			return ERR_PTR(-ENOMEM);
 		callback->func = func;
 		callback->nid = jack->nid;
 		callback->next = jack->callback;
 		jack->callback = callback;
 	}

 	if (jack->jack_detect)
 		return callback; /* already registered */
 	jack->jack_detect = 1;
 	if (codec->jackpoll_interval > 0)
 		return callback; /* No unsol if we're polling instead */
 	err = snd_hda_codec_write_cache(codec, nid, 0,
 					 AC_VERB_SET_UNSOLICITED_ENABLE,
 					 AC_USRSP_EN | jack->tag);
 	if (err < 0)
 		return ERR_PTR(err);
 	return callback;
 }
 EXPORT_SYMBOL_GPL(snd_hda_jack_detect_enable_callback);

 /**
  * snd_hda_jack_detect_enable - Enable the jack detection on the given pin
  * @codec: the HDA codec
  * @nid: pin NID to enable jack detection
  *
  * Enable the jack detection with the default callback.  Returns zero if
  * successful or a negative error code.
  */
 int snd_hda_jack_detect_enable(struct hda_codec *codec, hda_nid_t nid)
 {
 	return PTR_ERR_OR_ZERO(snd_hda_jack_detect_enable_callback(codec, nid, NULL));
 }
 EXPORT_SYMBOL_GPL(snd_hda_jack_detect_enable);

 /**
  * snd_hda_jack_set_gating_jack - Set gating jack.
  * @codec: the HDA codec
  * @gated_nid: gated pin NID
  * @gating_nid: gating pin NID
  *
  * Indicates the gated jack is only valid when the gating jack is plugged.
  */
 int snd_hda_jack_set_gating_jack(struct hda_codec *codec, hda_nid_t gated_nid,
 				 hda_nid_t gating_nid)
 {
 	struct hda_jack_tbl *gated = snd_hda_jack_tbl_new(codec, gated_nid);
 	struct hda_jack_tbl *gating = snd_hda_jack_tbl_new(codec, gating_nid);

 	if (!gated || !gating)
 		return -EINVAL;

 	gated->gating_jack = gating_nid;
 	gating->gated_jack = gated_nid;

 	return 0;
 }
 EXPORT_SYMBOL_GPL(snd_hda_jack_set_gating_jack);

 /**
  * snd_hda_jack_report_sync - sync the states of all jacks and report if changed
  * @codec: the HDA codec
  */
 void snd_hda_jack_report_sync(struct hda_codec *codec)
 {
 	struct hda_jack_tbl *jack;
 	int i, state;

 	/* update all jacks at first */
 	jack = codec->jacktbl.list;
 	for (i = 0; i < codec->jacktbl.used; i++, jack++)
 		if (jack->nid)
 			jack_detect_update(codec, jack);

 	/* report the updated jacks; it's done after updating all jacks
 	 * to make sure that all gating jacks properly have been set
 	 */
 	jack = codec->jacktbl.list;
 	for (i = 0; i < codec->jacktbl.used; i++, jack++)
 		if (jack->nid) {
 			if (!jack->jack || jack->block_report)
 				continue;
 			state = get_jack_plug_state(jack->pin_sense);
 			snd_jack_report(jack->jack,
 					state ? jack->type : 0);
 		}
 }
 EXPORT_SYMBOL_GPL(snd_hda_jack_report_sync);

 /* guess the jack type from the pin-config */
 static int get_input_jack_type(struct hda_codec *codec, hda_nid_t nid)
 {
 	unsigned int def_conf = snd_hda_codec_get_pincfg(codec, nid);
 	switch (get_defcfg_device(def_conf)) {
 	case AC_JACK_LINE_OUT:
 	case AC_JACK_SPEAKER:
 		return SND_JACK_LINEOUT;
 	case AC_JACK_HP_OUT:
 		return SND_JACK_HEADPHONE;
 	case AC_JACK_SPDIF_OUT:
 	case AC_JACK_DIG_OTHER_OUT:
 		return SND_JACK_AVOUT;
 	case AC_JACK_MIC_IN:
 		return SND_JACK_MICROPHONE;
 	default:
 		return SND_JACK_LINEIN;
 	}
 }

 static void hda_free_jack_priv(struct snd_jack *jack)
 {
 	struct hda_jack_tbl *jacks = jack->private_data;
 	jacks->nid = 0;
 	jacks->jack = NULL;
 }

 /**
  * snd_hda_jack_add_kctl - Add a kctl for the given pin
  * @codec: the HDA codec
  * @nid: pin NID to assign
  * @name: string name for the jack
  * @phantom_jack: flag to deal as a phantom jack
  *
  * This assigns a jack-detection kctl to the given pin.  The kcontrol
  * will have the given name and index.
  */
 int snd_hda_jack_add_kctl(struct hda_codec *codec, hda_nid_t nid,
 			  const char *name, bool phantom_jack)
 {
 	struct hda_jack_tbl *jack;
 	int err, state, type;

 	jack = snd_hda_jack_tbl_new(codec, nid);
 	if (!jack)
 		return 0;
 	if (jack->jack)
 		return 0; /* already created */

 	type = get_input_jack_type(codec, nid);
 	err = snd_jack_new(codec->card, name, type,
 			   &jack->jack, true, phantom_jack);
 	if (err < 0)
 		return err;

 	jack->phantom_jack = !!phantom_jack;
 	jack->type = type;
 	jack->jack->private_data = jack;
 	jack->jack->private_free = hda_free_jack_priv;
 	state = snd_hda_jack_detect(codec, nid);
 	snd_jack_report(jack->jack, state ? jack->type : 0);

 	return 0;
 }
 EXPORT_SYMBOL_GPL(snd_hda_jack_add_kctl);

 static int add_jack_kctl(struct hda_codec *codec, hda_nid_t nid,
 			 const struct auto_pin_cfg *cfg,
 			 const char *base_name)
 {
 	unsigned int def_conf, conn;
 	char name[SNDRV_CTL_ELEM_ID_NAME_MAXLEN];
 	int err;
 	bool phantom_jack;

 	if (!nid)
 		return 0;
 	def_conf = snd_hda_codec_get_pincfg(codec, nid);
 	conn = get_defcfg_connect(def_conf);
 	if (conn == AC_JACK_PORT_NONE)
 		return 0;
 	phantom_jack = (conn != AC_JACK_PORT_COMPLEX) ||
 		       !is_jack_detectable(codec, nid);

 	if (base_name)
 		strlcpy(name, base_name, sizeof(name));
 	else
 		snd_hda_get_pin_label(codec, nid, cfg, name, sizeof(name), NULL);
 	if (phantom_jack)
 		/* Example final name: "Internal Mic Phantom Jack" */
 		strncat(name, " Phantom", sizeof(name) - strlen(name) - 1);
 	err = snd_hda_jack_add_kctl(codec, nid, name, phantom_jack);
 	if (err < 0)
 		return err;

 	if (!phantom_jack)
 		return snd_hda_jack_detect_enable(codec, nid);
 	return 0;
 }

 /**
  * snd_hda_jack_add_kctls - Add kctls for all pins included in the given pincfg
  * @codec: the HDA codec
  * @cfg: pin config table to parse
  */
 int snd_hda_jack_add_kctls(struct hda_codec *codec,
 			   const struct auto_pin_cfg *cfg)
 {
 	const hda_nid_t *p;
 	int i, err;

 	for (i = 0; i < cfg->num_inputs; i++) {
 		/* If we have headphone mics; make sure they get the right name
 		   before grabbed by output pins */
 		if (cfg->inputs[i].is_headphone_mic) {
 			if (auto_cfg_hp_outs(cfg) == 1)
 				err = add_jack_kctl(codec, auto_cfg_hp_pins(cfg)[0],
 						    cfg, "Headphone Mic");
 			else
 				err = add_jack_kctl(codec, cfg->inputs[i].pin,
 						    cfg, "Headphone Mic");
 		} else
 			err = add_jack_kctl(codec, cfg->inputs[i].pin, cfg,
 					    NULL);
 		if (err < 0)
 			return err;
 	}

 	for (i = 0, p = cfg->line_out_pins; i < cfg->line_outs; i++, p++) {
 		err = add_jack_kctl(codec, *p, cfg, NULL);
 		if (err < 0)
 			return err;
 	}
 	for (i = 0, p = cfg->hp_pins; i < cfg->hp_outs; i++, p++) {
 		if (*p == *cfg->line_out_pins) /* might be duplicated */
 			break;
 		err = add_jack_kctl(codec, *p, cfg, NULL);
 		if (err < 0)
 			return err;
 	}
 	for (i = 0, p = cfg->speaker_pins; i < cfg->speaker_outs; i++, p++) {
 		if (*p == *cfg->line_out_pins) /* might be duplicated */
 			break;
 		err = add_jack_kctl(codec, *p, cfg, NULL);
 		if (err < 0)
 			return err;
 	}
 	for (i = 0, p = cfg->dig_out_pins; i < cfg->dig_outs; i++, p++) {
 		err = add_jack_kctl(codec, *p, cfg, NULL);
 		if (err < 0)
 			return err;
 	}
 	err = add_jack_kctl(codec, cfg->dig_in_pin, cfg, NULL);
 	if (err < 0)
 		return err;
 	err = add_jack_kctl(codec, cfg->mono_out_pin, cfg, NULL);
 	if (err < 0)
 		return err;
 	return 0;
 }
 EXPORT_SYMBOL_GPL(snd_hda_jack_add_kctls);

 static void call_jack_callback(struct hda_codec *codec,
 			       struct hda_jack_tbl *jack)
 {
 	struct hda_jack_callback *cb;

 	for (cb = jack->callback; cb; cb = cb->next)
 		cb->func(codec, cb);
 	if (jack->gated_jack) {
 		struct hda_jack_tbl *gated =
 			snd_hda_jack_tbl_get(codec, jack->gated_jack);
 		if (gated) {
 			for (cb = gated->callback; cb; cb = cb->next)
 				cb->func(codec, cb);
 		}
 	}
 }

 /**
  * snd_hda_jack_unsol_event - Handle an unsolicited event
  * @codec: the HDA codec
  * @res: the unsolicited event data
  */
 void snd_hda_jack_unsol_event(struct hda_codec *codec, unsigned int res)
 {
 	struct hda_jack_tbl *event;
 	int tag = (res >> AC_UNSOL_RES_TAG_SHIFT) & 0x7f;

 	event = snd_hda_jack_tbl_get_from_tag(codec, tag);
 	if (!event)
 		return;
 	event->jack_dirty = 1;

 	call_jack_callback(codec, event);
 	snd_hda_jack_report_sync(codec);
 }
 EXPORT_SYMBOL_GPL(snd_hda_jack_unsol_event);

 /**
  * snd_hda_jack_poll_all - Poll all jacks
  * @codec: the HDA codec
  *
  * Poll all detectable jacks with dirty flag, update the status, call
  * callbacks and call snd_hda_jack_report_sync() if any changes are found.
  */
 void snd_hda_jack_poll_all(struct hda_codec *codec)
 {
 	struct hda_jack_tbl *jack = codec->jacktbl.list;
 	int i, changes = 0;

 	for (i = 0; i < codec->jacktbl.used; i++, jack++) {
 		unsigned int old_sense;
 		if (!jack->nid || !jack->jack_dirty || jack->phantom_jack)
 			continue;
 		old_sense = get_jack_plug_state(jack->pin_sense);
 		jack_detect_update(codec, jack);
 		if (old_sense == get_jack_plug_state(jack->pin_sense))
 			continue;
 		changes = 1;
 		call_jack_callback(codec, jack);
 	}
 	if (changes)
 		snd_hda_jack_report_sync(codec);
 }
 EXPORT_SYMBOL_GPL(snd_hda_jack_poll_all);
	/*
	* Jack-detection handling for HD-audio
	*
	* Copyright (c) 2011 Takashi Iwai <tiwai@suse.de>
	*
	* This driver 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.
	*/

	#include <linux/init.h>
	#include <linux/slab.h>
	#include <linux/export.h>
	#include <sound/core.h>
	#include <sound/control.h>
	#include <sound/jack.h>
	#include "hda_codec.h"
	#include "hda_local.h"
	#include "hda_auto_parser.h"
	#include "hda_jack.h"

	/**
	* is_jack_detectable - Check whether the given pin is jack-detectable
	* @codec: the HDA codec
	* @nid: pin NID
	*
	* Check whether the given pin is capable to report the jack detection.
	* The jack detection might not work by various reasons, e.g. the jack
	* detection is prohibited in the codec level, the pin config has
	* AC_DEFCFG_MISC_NO_PRESENCE bit, no unsol support, etc.
	*/
	bool is_jack_detectable(struct hda_codec *codec, hda_nid_t nid)
	{
	if (codec->no_jack_detect)
	return false;
	if (!(snd_hda_query_pin_caps(codec, nid) & AC_PINCAP_PRES_DETECT))
	return false;
	if (get_defcfg_misc(snd_hda_codec_get_pincfg(codec, nid)) &
	AC_DEFCFG_MISC_NO_PRESENCE)
	return false;
	if (!(get_wcaps(codec, nid) & AC_WCAP_UNSOL_CAP) &&
	!codec->jackpoll_interval)
	return false;
	return true;
	}
	EXPORT_SYMBOL_GPL(is_jack_detectable);

	/* execute pin sense measurement */
	static u32 read_pin_sense(struct hda_codec *codec, hda_nid_t nid)
	{
	u32 pincap;
	u32 val;

	if (!codec->no_trigger_sense) {
	pincap = snd_hda_query_pin_caps(codec, nid);
	if (pincap & AC_PINCAP_TRIG_REQ) /* need trigger? */
	snd_hda_codec_read(codec, nid, 0,
	AC_VERB_SET_PIN_SENSE, 0);
	}
	val = snd_hda_codec_read(codec, nid, 0,
	AC_VERB_GET_PIN_SENSE, 0);
	if (codec->inv_jack_detect)
	val ^= AC_PINSENSE_PRESENCE;
	return val;
	}

	/**
	* snd_hda_jack_tbl_get - query the jack-table entry for the given NID
	* @codec: the HDA codec
	* @nid: pin NID to refer to
	*/
	struct hda_jack_tbl *
	snd_hda_jack_tbl_get(struct hda_codec *codec, hda_nid_t nid)
	{
	struct hda_jack_tbl *jack = codec->jacktbl.list;
	int i;

	if (!nid \|\| !jack)
	return NULL;
	for (i = 0; i < codec->jacktbl.used; i++, jack++)
	if (jack->nid == nid)
	return jack;
	return NULL;
	}
	EXPORT_SYMBOL_GPL(snd_hda_jack_tbl_get);

	/**
	* snd_hda_jack_tbl_get_from_tag - query the jack-table entry for the given tag
	* @codec: the HDA codec
	* @tag: tag value to refer to
	*/
	struct hda_jack_tbl *
	snd_hda_jack_tbl_get_from_tag(struct hda_codec *codec, unsigned char tag)
	{
	struct hda_jack_tbl *jack = codec->jacktbl.list;
	int i;

	if (!tag \|\| !jack)
	return NULL;
	for (i = 0; i < codec->jacktbl.used; i++, jack++)
	if (jack->tag == tag)
	return jack;
	return NULL;
	}
	EXPORT_SYMBOL_GPL(snd_hda_jack_tbl_get_from_tag);

	/**
	* snd_hda_jack_tbl_new - create a jack-table entry for the given NID
	* @codec: the HDA codec
	* @nid: pin NID to assign
	*/
	static struct hda_jack_tbl *
	snd_hda_jack_tbl_new(struct hda_codec *codec, hda_nid_t nid)
	{
	struct hda_jack_tbl *jack = snd_hda_jack_tbl_get(codec, nid);
	if (jack)
	return jack;
	jack = snd_array_new(&codec->jacktbl);
	if (!jack)
	return NULL;
	jack->nid = nid;
	jack->jack_dirty = 1;
	jack->tag = codec->jacktbl.used;
	return jack;
	}

	void snd_hda_jack_tbl_clear(struct hda_codec *codec)
	{
	struct hda_jack_tbl *jack = codec->jacktbl.list;
	int i;

	for (i = 0; i < codec->jacktbl.used; i++, jack++) {
	struct hda_jack_callback cb, next;

	/* free jack instances manually when clearing/reconfiguring */
	if (!codec->bus->shutdown && jack->jack)
	snd_device_free(codec->card, jack->jack);

	for (cb = jack->callback; cb; cb = next) {
	next = cb->next;
	kfree(cb);
	}
	}
	snd_array_free(&codec->jacktbl);
	}

	#define get_jack_plug_state(sense) !!(sense & AC_PINSENSE_PRESENCE)

	/* update the cached value and notification flag if needed */
	static void jack_detect_update(struct hda_codec *codec,
	struct hda_jack_tbl *jack)
	{
	if (!jack->jack_dirty)
	return;

	if (jack->phantom_jack)
	jack->pin_sense = AC_PINSENSE_PRESENCE;
	else
	jack->pin_sense = read_pin_sense(codec, jack->nid);

	/* A gating jack indicates the jack is invalid if gating is unplugged */
	if (jack->gating_jack && !snd_hda_jack_detect(codec, jack->gating_jack))
	jack->pin_sense &= ~AC_PINSENSE_PRESENCE;

	jack->jack_dirty = 0;

	/* If a jack is gated by this one update it. */
	if (jack->gated_jack) {
	struct hda_jack_tbl *gated =
	snd_hda_jack_tbl_get(codec, jack->gated_jack);
	if (gated) {
	gated->jack_dirty = 1;
	jack_detect_update(codec, gated);
	}
	}
	}

	/**
	* snd_hda_set_dirty_all - Mark all the cached as dirty
	* @codec: the HDA codec
	*
	* This function sets the dirty flag to all entries of jack table.
	* It's called from the resume path in hda_codec.c.
	*/
	void snd_hda_jack_set_dirty_all(struct hda_codec *codec)
	{
	struct hda_jack_tbl *jack = codec->jacktbl.list;
	int i;

	for (i = 0; i < codec->jacktbl.used; i++, jack++)
	if (jack->nid)
	jack->jack_dirty = 1;
	}
	EXPORT_SYMBOL_GPL(snd_hda_jack_set_dirty_all);

	/**
	* snd_hda_pin_sense - execute pin sense measurement
	* @codec: the CODEC to sense
	* @nid: the pin NID to sense
	*
	* Execute necessary pin sense measurement and return its Presence Detect,
	* Impedance, ELD Valid etc. status bits.
	*/
	u32 snd_hda_pin_sense(struct hda_codec *codec, hda_nid_t nid)
	{
	struct hda_jack_tbl *jack = snd_hda_jack_tbl_get(codec, nid);
	if (jack) {
	jack_detect_update(codec, jack);
	return jack->pin_sense;
	}
	return read_pin_sense(codec, nid);
	}
	EXPORT_SYMBOL_GPL(snd_hda_pin_sense);

	/**
	* snd_hda_jack_detect_state - query pin Presence Detect status
	* @codec: the CODEC to sense
	* @nid: the pin NID to sense
	*
	* Query and return the pin's Presence Detect status, as either
	* HDA_JACK_NOT_PRESENT, HDA_JACK_PRESENT or HDA_JACK_PHANTOM.
	*/
	int snd_hda_jack_detect_state(struct hda_codec *codec, hda_nid_t nid)
	{
	struct hda_jack_tbl *jack = snd_hda_jack_tbl_get(codec, nid);
	if (jack && jack->phantom_jack)
	return HDA_JACK_PHANTOM;
	else if (snd_hda_pin_sense(codec, nid) & AC_PINSENSE_PRESENCE)
	return HDA_JACK_PRESENT;
	else
	return HDA_JACK_NOT_PRESENT;
	}
	EXPORT_SYMBOL_GPL(snd_hda_jack_detect_state);

	/**
	* snd_hda_jack_detect_enable - enable the jack-detection
	* @codec: the HDA codec
	* @nid: pin NID to enable
	* @func: callback function to register
	*
	* In the case of error, the return value will be a pointer embedded with
	* errno. Check and handle the return value appropriately with standard
	* macros such as @IS_ERR() and @PTR_ERR().
	*/
	struct hda_jack_callback *
	snd_hda_jack_detect_enable_callback(struct hda_codec *codec, hda_nid_t nid,
	hda_jack_callback_fn func)
	{
	struct hda_jack_tbl *jack;
	struct hda_jack_callback *callback = NULL;
	int err;

	jack = snd_hda_jack_tbl_new(codec, nid);
	if (!jack)
	return ERR_PTR(-ENOMEM);
	if (func) {
	callback = kzalloc(sizeof(*callback), GFP_KERNEL);
	if (!callback)
	return ERR_PTR(-ENOMEM);
	callback->func = func;
	callback->nid = jack->nid;
	callback->next = jack->callback;
	jack->callback = callback;
	}

	if (jack->jack_detect)
	return callback; /* already registered */
	jack->jack_detect = 1;
	if (codec->jackpoll_interval > 0)
	return callback; /* No unsol if we're polling instead */
	err = snd_hda_codec_write_cache(codec, nid, 0,
	AC_VERB_SET_UNSOLICITED_ENABLE,
	AC_USRSP_EN \| jack->tag);
	if (err < 0)
	return ERR_PTR(err);
	return callback;
	}
	EXPORT_SYMBOL_GPL(snd_hda_jack_detect_enable_callback);

	/**
	* snd_hda_jack_detect_enable - Enable the jack detection on the given pin
	* @codec: the HDA codec
	* @nid: pin NID to enable jack detection
	*
	* Enable the jack detection with the default callback. Returns zero if
	* successful or a negative error code.
	*/
	int snd_hda_jack_detect_enable(struct hda_codec *codec, hda_nid_t nid)
	{
	return PTR_ERR_OR_ZERO(snd_hda_jack_detect_enable_callback(codec, nid, NULL));
	}
	EXPORT_SYMBOL_GPL(snd_hda_jack_detect_enable);

	/**
	* snd_hda_jack_set_gating_jack - Set gating jack.
	* @codec: the HDA codec
	* @gated_nid: gated pin NID
	* @gating_nid: gating pin NID
	*
	* Indicates the gated jack is only valid when the gating jack is plugged.
	*/
	int snd_hda_jack_set_gating_jack(struct hda_codec *codec, hda_nid_t gated_nid,
	hda_nid_t gating_nid)
	{
	struct hda_jack_tbl *gated = snd_hda_jack_tbl_new(codec, gated_nid);
	struct hda_jack_tbl *gating = snd_hda_jack_tbl_new(codec, gating_nid);

	if (!gated \|\| !gating)
	return -EINVAL;

	gated->gating_jack = gating_nid;
	gating->gated_jack = gated_nid;

	return 0;
	}
	EXPORT_SYMBOL_GPL(snd_hda_jack_set_gating_jack);

	/**
	* snd_hda_jack_report_sync - sync the states of all jacks and report if changed
	* @codec: the HDA codec
	*/
	void snd_hda_jack_report_sync(struct hda_codec *codec)
	{
	struct hda_jack_tbl *jack;
	int i, state;

	/* update all jacks at first */
	jack = codec->jacktbl.list;
	for (i = 0; i < codec->jacktbl.used; i++, jack++)
	if (jack->nid)
	jack_detect_update(codec, jack);

	/* report the updated jacks; it's done after updating all jacks
	* to make sure that all gating jacks properly have been set
	*/
	jack = codec->jacktbl.list;
	for (i = 0; i < codec->jacktbl.used; i++, jack++)
	if (jack->nid) {
	if (!jack->jack \|\| jack->block_report)
	continue;
	state = get_jack_plug_state(jack->pin_sense);
	snd_jack_report(jack->jack,
	state ? jack->type : 0);
	}
	}
	EXPORT_SYMBOL_GPL(snd_hda_jack_report_sync);

	/* guess the jack type from the pin-config */
	static int get_input_jack_type(struct hda_codec *codec, hda_nid_t nid)
	{
	unsigned int def_conf = snd_hda_codec_get_pincfg(codec, nid);
	switch (get_defcfg_device(def_conf)) {
	case AC_JACK_LINE_OUT:
	case AC_JACK_SPEAKER:
	return SND_JACK_LINEOUT;
	case AC_JACK_HP_OUT:
	return SND_JACK_HEADPHONE;
	case AC_JACK_SPDIF_OUT:
	case AC_JACK_DIG_OTHER_OUT:
	return SND_JACK_AVOUT;
	case AC_JACK_MIC_IN:
	return SND_JACK_MICROPHONE;
	default:
	return SND_JACK_LINEIN;
	}
	}

	static void hda_free_jack_priv(struct snd_jack *jack)
	{
	struct hda_jack_tbl *jacks = jack->private_data;
	jacks->nid = 0;
	jacks->jack = NULL;
	}

	/**
	* snd_hda_jack_add_kctl - Add a kctl for the given pin
	* @codec: the HDA codec
	* @nid: pin NID to assign
	* @name: string name for the jack
	* @phantom_jack: flag to deal as a phantom jack
	*
	* This assigns a jack-detection kctl to the given pin. The kcontrol
	* will have the given name and index.
	*/
	int snd_hda_jack_add_kctl(struct hda_codec *codec, hda_nid_t nid,
	const char *name, bool phantom_jack)
	{
	struct hda_jack_tbl *jack;
	int err, state, type;

	jack = snd_hda_jack_tbl_new(codec, nid);
	if (!jack)
	return 0;
	if (jack->jack)
	return 0; /* already created */

	type = get_input_jack_type(codec, nid);
	err = snd_jack_new(codec->card, name, type,
	&jack->jack, true, phantom_jack);
	if (err < 0)
	return err;

	jack->phantom_jack = !!phantom_jack;
	jack->type = type;
	jack->jack->private_data = jack;
	jack->jack->private_free = hda_free_jack_priv;
	state = snd_hda_jack_detect(codec, nid);
	snd_jack_report(jack->jack, state ? jack->type : 0);

	return 0;
	}
	EXPORT_SYMBOL_GPL(snd_hda_jack_add_kctl);

	static int add_jack_kctl(struct hda_codec *codec, hda_nid_t nid,
	const struct auto_pin_cfg *cfg,
	const char *base_name)
	{
	unsigned int def_conf, conn;
	char name[SNDRV_CTL_ELEM_ID_NAME_MAXLEN];
	int err;
	bool phantom_jack;

	if (!nid)
	return 0;
	def_conf = snd_hda_codec_get_pincfg(codec, nid);
	conn = get_defcfg_connect(def_conf);
	if (conn == AC_JACK_PORT_NONE)
	return 0;
	phantom_jack = (conn != AC_JACK_PORT_COMPLEX) \|\|
	!is_jack_detectable(codec, nid);

	if (base_name)
	strlcpy(name, base_name, sizeof(name));
	else
	snd_hda_get_pin_label(codec, nid, cfg, name, sizeof(name), NULL);
	if (phantom_jack)
	/* Example final name: "Internal Mic Phantom Jack" */
	strncat(name, " Phantom", sizeof(name) - strlen(name) - 1);
	err = snd_hda_jack_add_kctl(codec, nid, name, phantom_jack);
	if (err < 0)
	return err;

	if (!phantom_jack)
	return snd_hda_jack_detect_enable(codec, nid);
	return 0;
	}

	/**
	* snd_hda_jack_add_kctls - Add kctls for all pins included in the given pincfg
	* @codec: the HDA codec
	* @cfg: pin config table to parse
	*/
	int snd_hda_jack_add_kctls(struct hda_codec *codec,
	const struct auto_pin_cfg *cfg)
	{
	const hda_nid_t *p;
	int i, err;

	for (i = 0; i < cfg->num_inputs; i++) {
	/* If we have headphone mics; make sure they get the right name
	before grabbed by output pins */
	if (cfg->inputs[i].is_headphone_mic) {
	if (auto_cfg_hp_outs(cfg) == 1)
	err = add_jack_kctl(codec, auto_cfg_hp_pins(cfg)[0],
	cfg, "Headphone Mic");
	else
	err = add_jack_kctl(codec, cfg->inputs[i].pin,
	cfg, "Headphone Mic");
	} else
	err = add_jack_kctl(codec, cfg->inputs[i].pin, cfg,
	NULL);
	if (err < 0)
	return err;
	}

	for (i = 0, p = cfg->line_out_pins; i < cfg->line_outs; i++, p++) {
	err = add_jack_kctl(codec, *p, cfg, NULL);
	if (err < 0)
	return err;
	}
	for (i = 0, p = cfg->hp_pins; i < cfg->hp_outs; i++, p++) {
	if (p == cfg->line_out_pins) /* might be duplicated */
	break;
	err = add_jack_kctl(codec, *p, cfg, NULL);
	if (err < 0)
	return err;
	}
	for (i = 0, p = cfg->speaker_pins; i < cfg->speaker_outs; i++, p++) {
	if (p == cfg->line_out_pins) /* might be duplicated */
	break;
	err = add_jack_kctl(codec, *p, cfg, NULL);
	if (err < 0)
	return err;
	}
	for (i = 0, p = cfg->dig_out_pins; i < cfg->dig_outs; i++, p++) {
	err = add_jack_kctl(codec, *p, cfg, NULL);
	if (err < 0)
	return err;
	}
	err = add_jack_kctl(codec, cfg->dig_in_pin, cfg, NULL);
	if (err < 0)
	return err;
	err = add_jack_kctl(codec, cfg->mono_out_pin, cfg, NULL);
	if (err < 0)
	return err;
	return 0;
	}
	EXPORT_SYMBOL_GPL(snd_hda_jack_add_kctls);

	static void call_jack_callback(struct hda_codec *codec,
	struct hda_jack_tbl *jack)
	{
	struct hda_jack_callback *cb;

	for (cb = jack->callback; cb; cb = cb->next)
	cb->func(codec, cb);
	if (jack->gated_jack) {
	struct hda_jack_tbl *gated =
	snd_hda_jack_tbl_get(codec, jack->gated_jack);
	if (gated) {
	for (cb = gated->callback; cb; cb = cb->next)
	cb->func(codec, cb);
	}
	}
	}

	/**
	* snd_hda_jack_unsol_event - Handle an unsolicited event
	* @codec: the HDA codec
	* @res: the unsolicited event data
	*/
	void snd_hda_jack_unsol_event(struct hda_codec *codec, unsigned int res)
	{
	struct hda_jack_tbl *event;
	int tag = (res >> AC_UNSOL_RES_TAG_SHIFT) & 0x7f;

	event = snd_hda_jack_tbl_get_from_tag(codec, tag);
	if (!event)
	return;
	event->jack_dirty = 1;

	call_jack_callback(codec, event);
	snd_hda_jack_report_sync(codec);
	}
	EXPORT_SYMBOL_GPL(snd_hda_jack_unsol_event);

	/**
	* snd_hda_jack_poll_all - Poll all jacks
	* @codec: the HDA codec
	*
	* Poll all detectable jacks with dirty flag, update the status, call
	* callbacks and call snd_hda_jack_report_sync() if any changes are found.
	*/
	void snd_hda_jack_poll_all(struct hda_codec *codec)
	{
	struct hda_jack_tbl *jack = codec->jacktbl.list;
	int i, changes = 0;

	for (i = 0; i < codec->jacktbl.used; i++, jack++) {
	unsigned int old_sense;
	if (!jack->nid \|\| !jack->jack_dirty \|\| jack->phantom_jack)
	continue;
	old_sense = get_jack_plug_state(jack->pin_sense);
	jack_detect_update(codec, jack);
	if (old_sense == get_jack_plug_state(jack->pin_sense))
	continue;
	changes = 1;
	call_jack_callback(codec, jack);
	}
	if (changes)
	snd_hda_jack_report_sync(codec);
	}
	EXPORT_SYMBOL_GPL(snd_hda_jack_poll_all);