[ARM] tegra: driver for spdif audio

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>

1 files changed, 56 insertions, 0 deletions

diff --git a/include/linux/tegra_spdif.h b/include/linux/tegra_spdif.h
new file mode 100644
index 000000000000..8d7f6457a0d1
--- /dev/null
+++ b/include/linux/tegra_spdif.h
@@ -0,0 +1,56 @@
+/* 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*/