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| author | Rafael Ignacio Zurita <rizurita@yahoo.com> | 2009-11-03 17:16:27 -0300 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2009-11-04 09:17:40 +0100 |
| commit | 9dcaa7b25f2c8f6a0485854cd3641f585a154072 (patch) | |
| tree | 1f3453a235682f5ba4b4357633f3546a4dbf4e2b /include/sound | |
| parent | bcc2c6b7cb320d10c7fcccd87dce87f4384b4332 (diff) | |
| download | lwn-9dcaa7b25f2c8f6a0485854cd3641f585a154072.tar.gz lwn-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/sound')
| -rw-r--r-- | include/sound/sh_dac_audio.h | 21 |
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 */ |