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diff --git a/kernel/sound/soc/tegra/tegra20_das.h b/kernel/sound/soc/tegra/tegra20_das.h
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+/*
+ * tegra20_das.h - Definitions for Tegra20 DAS driver
+ *
+ * Author: Stephen Warren <swarren@nvidia.com>
+ * Copyright (C) 2010,2012 - NVIDIA, Inc.
+ *
+ * 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.
+ *
+ * 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 St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ *
+ */
+
+#ifndef __TEGRA20_DAS_H__
+#define __TEGRA20_DAS_H__
+
+/* Register TEGRA20_DAS_DAP_CTRL_SEL */
+#define TEGRA20_DAS_DAP_CTRL_SEL 0x00
+#define TEGRA20_DAS_DAP_CTRL_SEL_COUNT 5
+#define TEGRA20_DAS_DAP_CTRL_SEL_STRIDE 4
+#define TEGRA20_DAS_DAP_CTRL_SEL_DAP_MS_SEL_P 31
+#define TEGRA20_DAS_DAP_CTRL_SEL_DAP_MS_SEL_S 1
+#define TEGRA20_DAS_DAP_CTRL_SEL_DAP_SDATA1_TX_RX_P 30
+#define TEGRA20_DAS_DAP_CTRL_SEL_DAP_SDATA1_TX_RX_S 1
+#define TEGRA20_DAS_DAP_CTRL_SEL_DAP_SDATA2_TX_RX_P 29
+#define TEGRA20_DAS_DAP_CTRL_SEL_DAP_SDATA2_TX_RX_S 1
+#define TEGRA20_DAS_DAP_CTRL_SEL_DAP_CTRL_SEL_P 0
+#define TEGRA20_DAS_DAP_CTRL_SEL_DAP_CTRL_SEL_S 5
+
+/* Values for field TEGRA20_DAS_DAP_CTRL_SEL_DAP_CTRL_SEL */
+#define TEGRA20_DAS_DAP_SEL_DAC1 0
+#define TEGRA20_DAS_DAP_SEL_DAC2 1
+#define TEGRA20_DAS_DAP_SEL_DAC3 2
+#define TEGRA20_DAS_DAP_SEL_DAP1 16
+#define TEGRA20_DAS_DAP_SEL_DAP2 17
+#define TEGRA20_DAS_DAP_SEL_DAP3 18
+#define TEGRA20_DAS_DAP_SEL_DAP4 19
+#define TEGRA20_DAS_DAP_SEL_DAP5 20
+
+/* Register TEGRA20_DAS_DAC_INPUT_DATA_CLK_SEL */
+#define TEGRA20_DAS_DAC_INPUT_DATA_CLK_SEL 0x40
+#define TEGRA20_DAS_DAC_INPUT_DATA_CLK_SEL_COUNT 3
+#define TEGRA20_DAS_DAC_INPUT_DATA_CLK_SEL_STRIDE 4
+#define TEGRA20_DAS_DAC_INPUT_DATA_CLK_SEL_DAC_SDATA2_SEL_P 28
+#define TEGRA20_DAS_DAC_INPUT_DATA_CLK_SEL_DAC_SDATA2_SEL_S 4
+#define TEGRA20_DAS_DAC_INPUT_DATA_CLK_SEL_DAC_SDATA1_SEL_P 24
+#define TEGRA20_DAS_DAC_INPUT_DATA_CLK_SEL_DAC_SDATA1_SEL_S 4
+#define TEGRA20_DAS_DAC_INPUT_DATA_CLK_SEL_DAC_CLK_SEL_P 0
+#define TEGRA20_DAS_DAC_INPUT_DATA_CLK_SEL_DAC_CLK_SEL_S 4
+
+/*
+ * Values for:
+ * TEGRA20_DAS_DAC_INPUT_DATA_CLK_SEL_DAC_SDATA2_SEL
+ * TEGRA20_DAS_DAC_INPUT_DATA_CLK_SEL_DAC_SDATA1_SEL
+ * TEGRA20_DAS_DAC_INPUT_DATA_CLK_SEL_DAC_CLK_SEL
+ */
+#define TEGRA20_DAS_DAC_SEL_DAP1 0
+#define TEGRA20_DAS_DAC_SEL_DAP2 1
+#define TEGRA20_DAS_DAC_SEL_DAP3 2
+#define TEGRA20_DAS_DAC_SEL_DAP4 3
+#define TEGRA20_DAS_DAC_SEL_DAP5 4
+
+/*
+ * Names/IDs of the DACs/DAPs.
+ */
+
+#define TEGRA20_DAS_DAP_ID_1 0
+#define TEGRA20_DAS_DAP_ID_2 1
+#define TEGRA20_DAS_DAP_ID_3 2
+#define TEGRA20_DAS_DAP_ID_4 3
+#define TEGRA20_DAS_DAP_ID_5 4
+
+#define TEGRA20_DAS_DAC_ID_1 0
+#define TEGRA20_DAS_DAC_ID_2 1
+#define TEGRA20_DAS_DAC_ID_3 2
+
+struct tegra20_das {
+ struct device *dev;
+ struct regmap *regmap;
+};
+
+/*
+ * Terminology:
+ * DAS: Digital audio switch (HW module controlled by this driver)
+ * DAP: Digital audio port (port/pins on Tegra device)
+ * DAC: Digital audio controller (e.g. I2S or AC97 controller elsewhere)
+ *
+ * The Tegra DAS is a mux/cross-bar which can connect each DAP to a specific
+ * DAC, or another DAP. When DAPs are connected, one must be the master and
+ * one the slave. Each DAC allows selection of a specific DAP for input, to
+ * cater for the case where N DAPs are connected to 1 DAC for broadcast
+ * output.
+ *
+ * This driver is dumb; no attempt is made to ensure that a valid routing
+ * configuration is programmed.
+ */
+
+/*
+ * Connect a DAP to to a DAC
+ * dap_id: DAP to connect: TEGRA20_DAS_DAP_ID_*
+ * dac_sel: DAC to connect to: TEGRA20_DAS_DAP_SEL_DAC*
+ */
+extern int tegra20_das_connect_dap_to_dac(int dap_id, int dac_sel);
+
+/*
+ * Connect a DAP to to another DAP
+ * dap_id: DAP to connect: TEGRA20_DAS_DAP_ID_*
+ * other_dap_sel: DAP to connect to: TEGRA20_DAS_DAP_SEL_DAP*
+ * master: Is this DAP the master (1) or slave (0)
+ * sdata1rx: Is this DAP's SDATA1 pin RX (1) or TX (0)
+ * sdata2rx: Is this DAP's SDATA2 pin RX (1) or TX (0)
+ */
+extern int tegra20_das_connect_dap_to_dap(int dap_id, int other_dap_sel,
+ int master, int sdata1rx,
+ int sdata2rx);
+
+/*
+ * Connect a DAC's input to a DAP
+ * (DAC outputs are selected by the DAP)
+ * dac_id: DAC ID to connect: TEGRA20_DAS_DAC_ID_*
+ * dap_sel: DAP to receive input from: TEGRA20_DAS_DAC_SEL_DAP*
+ */
+extern int tegra20_das_connect_dac_to_dap(int dac_id, int dap_sel);
+
+#endif