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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/sound/soc/tegra/tegra_das.h
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/*

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 * tegra_das.h - Definitions for Tegra DAS driver

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 *

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 * Author: Stephen Warren <[email protected]>

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 * Copyright (C) 2010 - NVIDIA, Inc.

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 *

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 * This program is free software; you can redistribute it and/or

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 * modify it under the terms of the GNU General Public License

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 * version 2 as published by the Free Software Foundation.

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 *

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 * This program is distributed in the hope that it will be useful, but

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 * WITHOUT ANY WARRANTY; without even the implied warranty of

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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

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 * General Public License for more details.

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 *

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 * You should have received a copy of the GNU General Public License

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 * along with this program; if not, write to the Free Software

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 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA

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 * 02110-1301 USA

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 *

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 */

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#ifndef __TEGRA_DAS_H__

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#define __TEGRA_DAS_H__

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/* Register TEGRA_DAS_DAP_CTRL_SEL */

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#define TEGRA_DAS_DAP_CTRL_SEL				0x00

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#define TEGRA_DAS_DAP_CTRL_SEL_COUNT			5

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#define TEGRA_DAS_DAP_CTRL_SEL_STRIDE			4

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#define TEGRA_DAS_DAP_CTRL_SEL_DAP_MS_SEL_P		31

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#define TEGRA_DAS_DAP_CTRL_SEL_DAP_MS_SEL_S		1

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#define TEGRA_DAS_DAP_CTRL_SEL_DAP_SDATA1_TX_RX_P	30

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#define TEGRA_DAS_DAP_CTRL_SEL_DAP_SDATA1_TX_RX_S	1

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#define TEGRA_DAS_DAP_CTRL_SEL_DAP_SDATA2_TX_RX_P	29

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#define TEGRA_DAS_DAP_CTRL_SEL_DAP_SDATA2_TX_RX_S	1

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#define TEGRA_DAS_DAP_CTRL_SEL_DAP_CTRL_SEL_P		0

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#define TEGRA_DAS_DAP_CTRL_SEL_DAP_CTRL_SEL_S		5

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/* Values for field TEGRA_DAS_DAP_CTRL_SEL_DAP_CTRL_SEL */

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#define TEGRA_DAS_DAP_SEL_DAC1	0

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#define TEGRA_DAS_DAP_SEL_DAC2	1

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#define TEGRA_DAS_DAP_SEL_DAC3	2

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#define TEGRA_DAS_DAP_SEL_DAP1	16

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#define TEGRA_DAS_DAP_SEL_DAP2	17

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#define TEGRA_DAS_DAP_SEL_DAP3	18

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#define TEGRA_DAS_DAP_SEL_DAP4	19

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#define TEGRA_DAS_DAP_SEL_DAP5	20

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/* Register TEGRA_DAS_DAC_INPUT_DATA_CLK_SEL */

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#define TEGRA_DAS_DAC_INPUT_DATA_CLK_SEL			0x40

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#define TEGRA_DAS_DAC_INPUT_DATA_CLK_SEL_COUNT			3

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#define TEGRA_DAS_DAC_INPUT_DATA_CLK_SEL_STRIDE			4

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#define TEGRA_DAS_DAC_INPUT_DATA_CLK_SEL_DAC_SDATA2_SEL_P	28

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#define TEGRA_DAS_DAC_INPUT_DATA_CLK_SEL_DAC_SDATA2_SEL_S	4

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#define TEGRA_DAS_DAC_INPUT_DATA_CLK_SEL_DAC_SDATA1_SEL_P	24

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#define TEGRA_DAS_DAC_INPUT_DATA_CLK_SEL_DAC_SDATA1_SEL_S	4

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#define TEGRA_DAS_DAC_INPUT_DATA_CLK_SEL_DAC_CLK_SEL_P		0

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#define TEGRA_DAS_DAC_INPUT_DATA_CLK_SEL_DAC_CLK_SEL_S		4

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/*

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 * Values for:

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 * TEGRA_DAS_DAC_INPUT_DATA_CLK_SEL_DAC_SDATA2_SEL

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 * TEGRA_DAS_DAC_INPUT_DATA_CLK_SEL_DAC_SDATA1_SEL

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 * TEGRA_DAS_DAC_INPUT_DATA_CLK_SEL_DAC_CLK_SEL

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 */

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#define TEGRA_DAS_DAC_SEL_DAP1	0

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#define TEGRA_DAS_DAC_SEL_DAP2	1

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#define TEGRA_DAS_DAC_SEL_DAP3	2

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#define TEGRA_DAS_DAC_SEL_DAP4	3

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#define TEGRA_DAS_DAC_SEL_DAP5	4

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/*

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 * Names/IDs of the DACs/DAPs.

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 */

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#define TEGRA_DAS_DAP_ID_1 0

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#define TEGRA_DAS_DAP_ID_2 1

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#define TEGRA_DAS_DAP_ID_3 2

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#define TEGRA_DAS_DAP_ID_4 3

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#define TEGRA_DAS_DAP_ID_5 4

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#define TEGRA_DAS_DAC_ID_1 0

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#define TEGRA_DAS_DAC_ID_2 1

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#define TEGRA_DAS_DAC_ID_3 2

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struct tegra_das {

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	struct device *dev;

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	void __iomem *regs;

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	struct dentry *debug;

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};

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/*

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 * Terminology:

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 * DAS: Digital audio switch (HW module controlled by this driver)

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 * DAP: Digital audio port (port/pins on Tegra device)

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 * DAC: Digital audio controller (e.g. I2S or AC97 controller elsewhere)

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 * 

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 * The Tegra DAS is a mux/cross-bar which can connect each DAP to a specific

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 * DAC, or another DAP. When DAPs are connected, one must be the master and

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 * one the slave. Each DAC allows selection of a specific DAP for input, to

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 * cater for the case where N DAPs are connected to 1 DAC for broadcast

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 * output.

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 *

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 * This driver is dumb; no attempt is made to ensure that a valid routing

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 * configuration is programmed.

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 */

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/*

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 * Connect a DAP to to a DAC

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 * dap_id: DAP to connect: TEGRA_DAS_DAP_ID_*

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 * dac_sel: DAC to connect to: TEGRA_DAS_DAP_SEL_DAC*

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 */

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extern int tegra_das_connect_dap_to_dac(int dap_id, int dac_sel);

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/*

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 * Connect a DAP to to another DAP

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 * dap_id: DAP to connect: TEGRA_DAS_DAP_ID_*

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 * other_dap_sel: DAP to connect to: TEGRA_DAS_DAP_SEL_DAP*

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 * master: Is this DAP the master (1) or slave (0)

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 * sdata1rx: Is this DAP's SDATA1 pin RX (1) or TX (0)

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 * sdata2rx: Is this DAP's SDATA2 pin RX (1) or TX (0)

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 */

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extern int tegra_das_connect_dap_to_dap(int dap_id, int other_dap_sel,

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					int master, int sdata1rx,

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					int sdata2rx);

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/*

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 * Connect a DAC's input to a DAP

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 * (DAC outputs are selected by the DAP)

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 * dac_id: DAC ID to connect: TEGRA_DAS_DAC_ID_*

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 * dap_sel: DAP to receive input from: TEGRA_DAS_DAC_SEL_DAP*

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 */

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extern int tegra_das_connect_dac_to_dap(int dac_id, int dap_sel);

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#endif

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