kernel-ark/sound/pci/hda/hda_beep.h
Takashi Iwai fa79796631 ALSA: hda - Fix digital beep tone calculation
The digital beep tone is calculated in two different ways depending
on the codec chip.  The standard one is using a divider, and another
one is a linear tone for IDT/STAC codecs.  Currently, only the
latter type is used for all codecs, which resulted in a wrong tone
pitch.

This patch adds the calculation of the standard HD-audio type.
Also clean-up the fields in hda_beep struct.

Reference: bko#13162
	http://bugzilla.kernel.org/show_bug.cgi?id=13162

Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-05-19 12:54:55 +02:00

47 lines
1.5 KiB
C

/*
* Digital Beep Input Interface for HD-audio codec
*
* Author: Matthew Ranostay <mranostay@embeddedalley.com>
* Copyright (c) 2008 Embedded Alley Solutions Inc
*
* 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.
*
* This driver is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef __SOUND_HDA_BEEP_H
#define __SOUND_HDA_BEEP_H
#include "hda_codec.h"
/* beep information */
struct hda_beep {
struct input_dev *dev;
struct hda_codec *codec;
char phys[32];
int tone;
hda_nid_t nid;
unsigned int enabled:1;
unsigned int linear_tone:1; /* linear tone for IDT/STAC codec */
struct work_struct beep_work; /* scheduled task for beep event */
};
#ifdef CONFIG_SND_HDA_INPUT_BEEP
int snd_hda_attach_beep_device(struct hda_codec *codec, int nid);
void snd_hda_detach_beep_device(struct hda_codec *codec);
#else
#define snd_hda_attach_beep_device(...) 0
#define snd_hda_detach_beep_device(...)
#endif
#endif