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authorRobert Jarzmik <robert.jarzmik@free.fr>2017-09-02 22:54:04 +0300
committerMark Brown <broonie@kernel.org>2017-09-04 20:24:56 +0300
commit74426fbff66eea8e8d1f42c8238c268d1e63a832 (patch)
tree98b6d36b8fc9f8059cbbb2114ce592dab5a94be7 /sound/ac97/ac97_core.h
parent8e4f7d9b8c652b4eb3ceb790e1e9fe433f9e3b58 (diff)
downloadlinux-74426fbff66eea8e8d1f42c8238c268d1e63a832.tar.xz
ALSA: ac97: add an ac97 bus
AC97 is a bus for sound usage. It enables for a AC97 AC-Link to link one controller to 0 to 4 AC97 codecs. The goal of this new implementation is to implement a device/driver model for AC97, with an automatic scan of the bus and automatic discovery of AC97 codec devices. Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr> Reviewed-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound/ac97/ac97_core.h')
-rw-r--r--sound/ac97/ac97_core.h16
1 files changed, 16 insertions, 0 deletions
diff --git a/sound/ac97/ac97_core.h b/sound/ac97/ac97_core.h
new file mode 100644
index 000000000000..08441a4fda7c
--- /dev/null
+++ b/sound/ac97/ac97_core.h
@@ -0,0 +1,16 @@
+/*
+ * Copyright (C) 2016 Robert Jarzmik <robert.jarzmik@free.fr>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+unsigned int snd_ac97_bus_scan_one(struct ac97_controller *ac97,
+ unsigned int codec_num);
+
+static inline bool ac97_ids_match(unsigned int id1, unsigned int id2,
+ unsigned int mask)
+{
+ return (id1 & mask) == (id2 & mask);
+}