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[ARM] tegra: driver for spdif audio

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Creates /dev/spdif_out and /dev/spdif_out_ctl for playback and control
settings.  Playback is working.

Signed-off-by: Iliyan Malchev <malchev@google.com>
This commit is contained in:
Ravindra Lokhande
2010-09-27 12:53:41 -05:00
committed by Iliyan Malchev
parent 624287cd63
commit 53bb435d8d
4 changed files with 1845 additions and 0 deletions
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56
include/linux/tegra_spdif.h Normal file
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/* include/linux/tegra_spdif.h
*
* SPDIF audio driver for NVIDIA Tegra SoCs
*
* Copyright (c) 2008-2009, NVIDIA Corporation.
*
* This program 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 program 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#ifndef _TEGRA_SPDIF_H
#define _TEGRA_SPDIF_H
#include <linux/ioctl.h>
#define TEGRA_SPDIF_MAGIC 's'
struct tegra_audio_buf_config {
unsigned size; /* order */
unsigned threshold; /* order */
unsigned chunk; /* order */
};
#define TEGRA_AUDIO_OUT_SET_BUF_CONFIG _IOW(TEGRA_SPDIF_MAGIC, 0, \
const struct tegra_audio_buf_config *)
#define TEGRA_AUDIO_OUT_GET_BUF_CONFIG _IOR(TEGRA_SPDIF_MAGIC, 1, \
struct tegra_audio_buf_config *)
#define TEGRA_AUDIO_OUT_GET_ERROR_COUNT _IOR(TEGRA_SPDIF_MAGIC, 2, \
unsigned *)
struct tegra_audio_out_preload {
void *data;
size_t len;
size_t len_written;
};
#define TEGRA_AUDIO_OUT_PRELOAD_FIFO _IOWR(TEGRA_SPDIF_MAGIC, 3, \
struct tegra_audio_out_preload *)
#endif/*_TEGRA_SPDIF_H*/