ALSA: hda: digital pc-beep support hd-audio codecs

Added digital pc-beep support using linear tone generation for hd-codecs along
with initial support for several IDT codecs.

Signed-off-by: Matthew Ranostay <mranostay@embeddedalley.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>

1 files changed, 44 insertions, 0 deletions

diff --git a/sound/pci/hda/hda_beep.h b/sound/pci/hda/hda_beep.h
new file mode 100644
index 000000000000..de4036e6e710
--- /dev/null
+++ b/sound/pci/hda/hda_beep.h
@@ -0,0 +1,44 @@
+/*
+ * 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;
+        int nid;
+        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(...)
+#define snd_hda_detach_beep_device(...)
+#endif
+#endif