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authorRafael Ignacio Zurita <rizurita@yahoo.com>2009-11-03 17:16:27 -0300
committerTakashi Iwai <tiwai@suse.de>2009-11-04 09:17:40 +0100
commit9dcaa7b25f2c8f6a0485854cd3641f585a154072 (patch)
tree1f3453a235682f5ba4b4357633f3546a4dbf4e2b /include
parentALSA: snd-pcsp: add nopcm mode (diff)
downloadlinux-dev-9dcaa7b25f2c8f6a0485854cd3641f585a154072.tar.xz
linux-dev-9dcaa7b25f2c8f6a0485854cd3641f585a154072.zip
ALSA: sh: add SuperH DAC audio driver for ALSA V4
This is a port of the sound/oss/sh_dac_audio.c driver. The driver uses an on-chip 8-bit D/A converter, which has a speaker connected to one of its channels, found in several ancient HP machines. For interrupts it uses a high-resolution timer (hrtimer). Tested on SH7709 based hp6xx (HP Jornada 680/690 and HP Palmtop 620lx/660lx). Also, since OSS Emulation works, the old OSS sound/oss/sh_dac_audio.c driver would be obsolete soon, and it could be removed. Signed-off-by: Rafael Ignacio Zurita <rizurita@yahoo.com> Acked-by: Paul Mundt <lethal@linux-sh.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'include')
-rw-r--r--include/sound/sh_dac_audio.h21
1 files changed, 21 insertions, 0 deletions
diff --git a/include/sound/sh_dac_audio.h b/include/sound/sh_dac_audio.h
new file mode 100644
index 000000000000..f5deaf1ddb9f
--- /dev/null
+++ b/include/sound/sh_dac_audio.h
@@ -0,0 +1,21 @@
+/*
+ * SH_DAC specific configuration, for the dac_audio platform_device
+ *
+ * Copyright (C) 2009 Rafael Ignacio Zurita <rizurita@yahoo.com>
+ *
+ * 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.
+ */
+
+#ifndef __INCLUDE_SH_DAC_AUDIO_H
+#define __INCLUDE_SH_DAC_AUDIO_H
+
+struct dac_audio_pdata {
+ int buffer_size;
+ int channel;
+ void (*start)(struct dac_audio_pdata *pd);
+ void (*stop)(struct dac_audio_pdata *pd);
+};
+
+#endif /* __INCLUDE_SH_DAC_AUDIO_H */