linux_old1/sound/pci/hda/hda_jack.c

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/*
* 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 <sound/core.h>
#include <sound/control.h>
#include "hda_codec.h"
#include "hda_local.h"
#include "hda_jack.h"
/* execute pin sense measurement */
static u32 read_pin_sense(struct hda_codec *codec, hda_nid_t nid)
{
u32 pincap;
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);
}
return snd_hda_codec_read(codec, nid, 0,
AC_VERB_GET_PIN_SENSE, 0);
}
/**
* snd_hda_jack_tbl_get - query the jack-table entry for the given NID
*/
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_HDA(snd_hda_jack_tbl_get);
/**
* snd_hda_jack_tbl_new - create a jack-table entry for the given NID
*/
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;
snd_array_init(&codec->jacktbl, sizeof(*jack), 16);
jack = snd_array_new(&codec->jacktbl);
if (!jack)
return NULL;
jack->nid = nid;
jack->jack_dirty = 1;
return jack;
}
void snd_hda_jack_tbl_clear(struct hda_codec *codec)
{
snd_array_free(&codec->jacktbl);
}
/* 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 || !jack->jack_cachable) {
unsigned int val = read_pin_sense(codec, jack->nid);
jack->jack_dirty = 0;
if (val != jack->pin_sense) {
jack->need_notify = 1;
jack->pin_sense = val;
}
}
}
/**
* snd_hda_set_dirty_all - Mark all the cached as dirty
*
* 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_HDA(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_HDA(snd_hda_pin_sense);
/**
* snd_hda_jack_detect - 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.
*/
int snd_hda_jack_detect(struct hda_codec *codec, hda_nid_t nid)
{
u32 sense = snd_hda_pin_sense(codec, nid);
return !!(sense & AC_PINSENSE_PRESENCE);
}
EXPORT_SYMBOL_HDA(snd_hda_jack_detect);
/**
* snd_hda_jack_detect_enable - enable the jack-detection
*/
int snd_hda_jack_detect_enable(struct hda_codec *codec, hda_nid_t nid,
unsigned int tag)
{
struct hda_jack_tbl *jack = snd_hda_jack_tbl_new(codec, nid);
if (!jack)
return -ENOMEM;
if (jack->jack_cachable)
return 0; /* already registered */
jack->jack_cachable = 1;
return snd_hda_codec_write_cache(codec, nid, 0,
AC_VERB_SET_UNSOLICITED_ENABLE,
AC_USRSP_EN | tag);
}
EXPORT_SYMBOL_HDA(snd_hda_jack_detect_enable);
/* queue the notification when needed */
static void jack_detect_report(struct hda_codec *codec,
struct hda_jack_tbl *jack)
{
jack_detect_update(codec, jack);
if (jack->need_notify) {
snd_ctl_notify(codec->bus->card, SNDRV_CTL_EVENT_MASK_VALUE,
&jack->kctl->id);
jack->need_notify = 0;
}
}
/**
* snd_hda_jack_report - notify kctl when the jack state was changed
*/
void snd_hda_jack_report(struct hda_codec *codec, hda_nid_t nid)
{
struct hda_jack_tbl *jack = snd_hda_jack_tbl_get(codec, nid);
if (jack)
jack_detect_report(codec, jack);
}
EXPORT_SYMBOL_HDA(snd_hda_jack_report);
/**
* snd_hda_jack_report_sync - sync the states of all jacks and report if changed
*/
void snd_hda_jack_report_sync(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_detect_update(codec, jack);
jack_detect_report(codec, jack);
}
}
EXPORT_SYMBOL_HDA(snd_hda_jack_report_sync);
/*
* jack-detection kcontrols
*/
#define jack_detect_kctl_info snd_ctl_boolean_mono_info
static int jack_detect_kctl_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
hda_nid_t nid = kcontrol->private_value;
ucontrol->value.integer.value[0] = snd_hda_jack_detect(codec, nid);
return 0;
}
static struct snd_kcontrol_new jack_detect_kctl = {
/* name is filled later */
.iface = SNDRV_CTL_ELEM_IFACE_CARD,
.access = SNDRV_CTL_ELEM_ACCESS_READ,
.info = jack_detect_kctl_info,
.get = jack_detect_kctl_get,
};
/**
* snd_hda_jack_add_kctl - Add a kctl for the given pin
*
* 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, int idx)
{
struct hda_jack_tbl *jack;
struct snd_kcontrol *kctl;
jack = snd_hda_jack_tbl_get(codec, nid);
if (!jack)
return 0;
if (jack->kctl)
return 0; /* already created */
kctl = snd_ctl_new1(&jack_detect_kctl, codec);
if (!kctl)
return -ENOMEM;
snprintf(kctl->id.name, sizeof(kctl->id.name), "%s Jack", name);
kctl->id.index = idx;
kctl->private_value = nid;
if (snd_hda_ctl_add(codec, nid, kctl) < 0)
return -ENOMEM;
jack->kctl = kctl;
return 0;
}
static int add_jack_kctl(struct hda_codec *codec, hda_nid_t nid, int idx,
const struct auto_pin_cfg *cfg)
{
if (!nid)
return 0;
if (!is_jack_detectable(codec, nid))
return 0;
return snd_hda_jack_add_kctl(codec, nid,
snd_hda_get_pin_label(codec, nid, cfg),
idx);
}
/**
* snd_hda_jack_add_kctls - Add kctls for all pins included in the given pincfg
*
* As of now, it assigns only to the pins that enabled the detection.
* Usually this is called at the end of build_controls callback.
*/
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, p = cfg->line_out_pins; i < cfg->line_outs; i++, p++) {
err = add_jack_kctl(codec, *p, i, cfg);
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, i, cfg);
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, i, cfg);
if (err < 0)
return err;
}
for (i = 0; i < cfg->num_inputs; i++) {
err = add_jack_kctl(codec, cfg->inputs[i].pin, 0, cfg);
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, i, cfg);
if (err < 0)
return err;
}
err = add_jack_kctl(codec, cfg->dig_in_pin, 0, cfg);
if (err < 0)
return err;
err = add_jack_kctl(codec, cfg->mono_out_pin, 0, cfg);
if (err < 0)
return err;
return 0;
}
EXPORT_SYMBOL_HDA(snd_hda_jack_add_kctls);