329 lines
7.8 KiB
C
329 lines
7.8 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Digital Beep Input Interface for HD-audio codec
|
|
*
|
|
* Author: Matt Ranostay <matt.ranostay@konsulko.com>
|
|
* Copyright (c) 2008 Embedded Alley Solutions Inc
|
|
*/
|
|
|
|
#include <linux/input.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/workqueue.h>
|
|
#include <linux/export.h>
|
|
#include <sound/core.h>
|
|
#include "hda_beep.h"
|
|
#include "hda_local.h"
|
|
|
|
enum {
|
|
DIGBEEP_HZ_STEP = 46875, /* 46.875 Hz */
|
|
DIGBEEP_HZ_MIN = 93750, /* 93.750 Hz */
|
|
DIGBEEP_HZ_MAX = 12000000, /* 12 KHz */
|
|
};
|
|
|
|
/* generate or stop tone */
|
|
static void generate_tone(struct hda_beep *beep, int tone)
|
|
{
|
|
struct hda_codec *codec = beep->codec;
|
|
|
|
if (tone && !beep->playing) {
|
|
snd_hda_power_up(codec);
|
|
if (beep->power_hook)
|
|
beep->power_hook(beep, true);
|
|
beep->playing = 1;
|
|
}
|
|
snd_hda_codec_write(codec, beep->nid, 0,
|
|
AC_VERB_SET_BEEP_CONTROL, tone);
|
|
if (!tone && beep->playing) {
|
|
beep->playing = 0;
|
|
if (beep->power_hook)
|
|
beep->power_hook(beep, false);
|
|
snd_hda_power_down(codec);
|
|
}
|
|
}
|
|
|
|
static void snd_hda_generate_beep(struct work_struct *work)
|
|
{
|
|
struct hda_beep *beep =
|
|
container_of(work, struct hda_beep, beep_work);
|
|
|
|
if (beep->enabled)
|
|
generate_tone(beep, beep->tone);
|
|
}
|
|
|
|
/* (non-standard) Linear beep tone calculation for IDT/STAC codecs
|
|
*
|
|
* The tone frequency of beep generator on IDT/STAC codecs is
|
|
* defined from the 8bit tone parameter, in Hz,
|
|
* freq = 48000 * (257 - tone) / 1024
|
|
* that is from 12kHz to 93.75Hz in steps of 46.875 Hz
|
|
*/
|
|
static int beep_linear_tone(struct hda_beep *beep, int hz)
|
|
{
|
|
if (hz <= 0)
|
|
return 0;
|
|
hz *= 1000; /* fixed point */
|
|
hz = hz - DIGBEEP_HZ_MIN
|
|
+ DIGBEEP_HZ_STEP / 2; /* round to nearest step */
|
|
if (hz < 0)
|
|
hz = 0; /* turn off PC beep*/
|
|
else if (hz >= (DIGBEEP_HZ_MAX - DIGBEEP_HZ_MIN))
|
|
hz = 1; /* max frequency */
|
|
else {
|
|
hz /= DIGBEEP_HZ_STEP;
|
|
hz = 255 - hz;
|
|
}
|
|
return hz;
|
|
}
|
|
|
|
/* HD-audio standard beep tone parameter calculation
|
|
*
|
|
* The tone frequency in Hz is calculated as
|
|
* freq = 48000 / (tone * 4)
|
|
* from 47Hz to 12kHz
|
|
*/
|
|
static int beep_standard_tone(struct hda_beep *beep, int hz)
|
|
{
|
|
if (hz <= 0)
|
|
return 0; /* disabled */
|
|
hz = 12000 / hz;
|
|
if (hz > 0xff)
|
|
return 0xff;
|
|
if (hz <= 0)
|
|
return 1;
|
|
return hz;
|
|
}
|
|
|
|
static int snd_hda_beep_event(struct input_dev *dev, unsigned int type,
|
|
unsigned int code, int hz)
|
|
{
|
|
struct hda_beep *beep = input_get_drvdata(dev);
|
|
|
|
switch (code) {
|
|
case SND_BELL:
|
|
if (hz)
|
|
hz = 1000;
|
|
/* fallthru */
|
|
case SND_TONE:
|
|
if (beep->linear_tone)
|
|
beep->tone = beep_linear_tone(beep, hz);
|
|
else
|
|
beep->tone = beep_standard_tone(beep, hz);
|
|
break;
|
|
default:
|
|
return -1;
|
|
}
|
|
|
|
/* schedule beep event */
|
|
schedule_work(&beep->beep_work);
|
|
return 0;
|
|
}
|
|
|
|
static void turn_off_beep(struct hda_beep *beep)
|
|
{
|
|
cancel_work_sync(&beep->beep_work);
|
|
if (beep->playing) {
|
|
/* turn off beep */
|
|
generate_tone(beep, 0);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* snd_hda_enable_beep_device - Turn on/off beep sound
|
|
* @codec: the HDA codec
|
|
* @enable: flag to turn on/off
|
|
*/
|
|
int snd_hda_enable_beep_device(struct hda_codec *codec, int enable)
|
|
{
|
|
struct hda_beep *beep = codec->beep;
|
|
if (!beep)
|
|
return 0;
|
|
enable = !!enable;
|
|
if (beep->enabled != enable) {
|
|
beep->enabled = enable;
|
|
if (!enable)
|
|
turn_off_beep(beep);
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(snd_hda_enable_beep_device);
|
|
|
|
static int beep_dev_register(struct snd_device *device)
|
|
{
|
|
struct hda_beep *beep = device->device_data;
|
|
int err;
|
|
|
|
err = input_register_device(beep->dev);
|
|
if (!err)
|
|
beep->registered = true;
|
|
return err;
|
|
}
|
|
|
|
static int beep_dev_disconnect(struct snd_device *device)
|
|
{
|
|
struct hda_beep *beep = device->device_data;
|
|
|
|
if (beep->registered)
|
|
input_unregister_device(beep->dev);
|
|
else
|
|
input_free_device(beep->dev);
|
|
turn_off_beep(beep);
|
|
return 0;
|
|
}
|
|
|
|
static int beep_dev_free(struct snd_device *device)
|
|
{
|
|
struct hda_beep *beep = device->device_data;
|
|
|
|
beep->codec->beep = NULL;
|
|
kfree(beep);
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* snd_hda_attach_beep_device - Attach a beep input device
|
|
* @codec: the HDA codec
|
|
* @nid: beep NID
|
|
*
|
|
* Attach a beep object to the given widget. If beep hint is turned off
|
|
* explicitly or beep_mode of the codec is turned off, this doesn't nothing.
|
|
*
|
|
* Currently, only one beep device is allowed to each codec.
|
|
*/
|
|
int snd_hda_attach_beep_device(struct hda_codec *codec, int nid)
|
|
{
|
|
static const struct snd_device_ops ops = {
|
|
.dev_register = beep_dev_register,
|
|
.dev_disconnect = beep_dev_disconnect,
|
|
.dev_free = beep_dev_free,
|
|
};
|
|
struct input_dev *input_dev;
|
|
struct hda_beep *beep;
|
|
int err;
|
|
|
|
if (!snd_hda_get_bool_hint(codec, "beep"))
|
|
return 0; /* disabled explicitly by hints */
|
|
if (codec->beep_mode == HDA_BEEP_MODE_OFF)
|
|
return 0; /* disabled by module option */
|
|
|
|
beep = kzalloc(sizeof(*beep), GFP_KERNEL);
|
|
if (beep == NULL)
|
|
return -ENOMEM;
|
|
snprintf(beep->phys, sizeof(beep->phys),
|
|
"card%d/codec#%d/beep0", codec->card->number, codec->addr);
|
|
/* enable linear scale */
|
|
snd_hda_codec_write_cache(codec, nid, 0,
|
|
AC_VERB_SET_DIGI_CONVERT_2, 0x01);
|
|
|
|
beep->nid = nid;
|
|
beep->codec = codec;
|
|
codec->beep = beep;
|
|
|
|
INIT_WORK(&beep->beep_work, &snd_hda_generate_beep);
|
|
mutex_init(&beep->mutex);
|
|
|
|
input_dev = input_allocate_device();
|
|
if (!input_dev) {
|
|
err = -ENOMEM;
|
|
goto err_free;
|
|
}
|
|
|
|
/* setup digital beep device */
|
|
input_dev->name = "HDA Digital PCBeep";
|
|
input_dev->phys = beep->phys;
|
|
input_dev->id.bustype = BUS_PCI;
|
|
input_dev->dev.parent = &codec->card->card_dev;
|
|
|
|
input_dev->id.vendor = codec->core.vendor_id >> 16;
|
|
input_dev->id.product = codec->core.vendor_id & 0xffff;
|
|
input_dev->id.version = 0x01;
|
|
|
|
input_dev->evbit[0] = BIT_MASK(EV_SND);
|
|
input_dev->sndbit[0] = BIT_MASK(SND_BELL) | BIT_MASK(SND_TONE);
|
|
input_dev->event = snd_hda_beep_event;
|
|
input_set_drvdata(input_dev, beep);
|
|
|
|
beep->dev = input_dev;
|
|
|
|
err = snd_device_new(codec->card, SNDRV_DEV_JACK, beep, &ops);
|
|
if (err < 0)
|
|
goto err_input;
|
|
|
|
return 0;
|
|
|
|
err_input:
|
|
input_free_device(beep->dev);
|
|
err_free:
|
|
kfree(beep);
|
|
codec->beep = NULL;
|
|
return err;
|
|
}
|
|
EXPORT_SYMBOL_GPL(snd_hda_attach_beep_device);
|
|
|
|
/**
|
|
* snd_hda_detach_beep_device - Detach the beep device
|
|
* @codec: the HDA codec
|
|
*/
|
|
void snd_hda_detach_beep_device(struct hda_codec *codec)
|
|
{
|
|
if (!codec->bus->shutdown && codec->beep)
|
|
snd_device_free(codec->card, codec->beep);
|
|
}
|
|
EXPORT_SYMBOL_GPL(snd_hda_detach_beep_device);
|
|
|
|
static bool ctl_has_mute(struct snd_kcontrol *kcontrol)
|
|
{
|
|
struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
|
|
return query_amp_caps(codec, get_amp_nid(kcontrol),
|
|
get_amp_direction(kcontrol)) & AC_AMPCAP_MUTE;
|
|
}
|
|
|
|
/* get/put callbacks for beep mute mixer switches */
|
|
|
|
/**
|
|
* snd_hda_mixer_amp_switch_get_beep - Get callback for beep controls
|
|
* @kcontrol: ctl element
|
|
* @ucontrol: pointer to get/store the data
|
|
*/
|
|
int snd_hda_mixer_amp_switch_get_beep(struct snd_kcontrol *kcontrol,
|
|
struct snd_ctl_elem_value *ucontrol)
|
|
{
|
|
struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
|
|
struct hda_beep *beep = codec->beep;
|
|
if (beep && (!beep->enabled || !ctl_has_mute(kcontrol))) {
|
|
ucontrol->value.integer.value[0] =
|
|
ucontrol->value.integer.value[1] = beep->enabled;
|
|
return 0;
|
|
}
|
|
return snd_hda_mixer_amp_switch_get(kcontrol, ucontrol);
|
|
}
|
|
EXPORT_SYMBOL_GPL(snd_hda_mixer_amp_switch_get_beep);
|
|
|
|
/**
|
|
* snd_hda_mixer_amp_switch_put_beep - Put callback for beep controls
|
|
* @kcontrol: ctl element
|
|
* @ucontrol: pointer to get/store the data
|
|
*/
|
|
int snd_hda_mixer_amp_switch_put_beep(struct snd_kcontrol *kcontrol,
|
|
struct snd_ctl_elem_value *ucontrol)
|
|
{
|
|
struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
|
|
struct hda_beep *beep = codec->beep;
|
|
if (beep) {
|
|
u8 chs = get_amp_channels(kcontrol);
|
|
int enable = 0;
|
|
long *valp = ucontrol->value.integer.value;
|
|
if (chs & 1) {
|
|
enable |= *valp;
|
|
valp++;
|
|
}
|
|
if (chs & 2)
|
|
enable |= *valp;
|
|
snd_hda_enable_beep_device(codec, enable);
|
|
}
|
|
if (!ctl_has_mute(kcontrol))
|
|
return 0;
|
|
return snd_hda_mixer_amp_switch_put(kcontrol, ucontrol);
|
|
}
|
|
EXPORT_SYMBOL_GPL(snd_hda_mixer_amp_switch_put_beep);
|