tegra_das.h
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/*
* tegra_das.h - Definitions for Tegra DAS driver
*
* Author: Stephen Warren <swarren@nvidia.com>
* Copyright (C) 2010 - 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 __TEGRA_DAS_H__
#define __TEGRA_DAS_H__
/* Register TEGRA_DAS_DAP_CTRL_SEL */
#define TEGRA_DAS_DAP_CTRL_SEL 0x00
#define TEGRA_DAS_DAP_CTRL_SEL_COUNT 5
#define TEGRA_DAS_DAP_CTRL_SEL_STRIDE 4
#define TEGRA_DAS_DAP_CTRL_SEL_DAP_MS_SEL_P 31
#define TEGRA_DAS_DAP_CTRL_SEL_DAP_MS_SEL_S 1
#define TEGRA_DAS_DAP_CTRL_SEL_DAP_SDATA1_TX_RX_P 30
#define TEGRA_DAS_DAP_CTRL_SEL_DAP_SDATA1_TX_RX_S 1
#define TEGRA_DAS_DAP_CTRL_SEL_DAP_SDATA2_TX_RX_P 29
#define TEGRA_DAS_DAP_CTRL_SEL_DAP_SDATA2_TX_RX_S 1
#define TEGRA_DAS_DAP_CTRL_SEL_DAP_CTRL_SEL_P 0
#define TEGRA_DAS_DAP_CTRL_SEL_DAP_CTRL_SEL_S 5
/* Values for field TEGRA_DAS_DAP_CTRL_SEL_DAP_CTRL_SEL */
#define TEGRA_DAS_DAP_SEL_DAC1 0
#define TEGRA_DAS_DAP_SEL_DAC2 1
#define TEGRA_DAS_DAP_SEL_DAC3 2
#define TEGRA_DAS_DAP_SEL_DAP1 16
#define TEGRA_DAS_DAP_SEL_DAP2 17
#define TEGRA_DAS_DAP_SEL_DAP3 18
#define TEGRA_DAS_DAP_SEL_DAP4 19
#define TEGRA_DAS_DAP_SEL_DAP5 20
/* Register TEGRA_DAS_DAC_INPUT_DATA_CLK_SEL */
#define TEGRA_DAS_DAC_INPUT_DATA_CLK_SEL 0x40
#define TEGRA_DAS_DAC_INPUT_DATA_CLK_SEL_COUNT 3
#define TEGRA_DAS_DAC_INPUT_DATA_CLK_SEL_STRIDE 4
#define TEGRA_DAS_DAC_INPUT_DATA_CLK_SEL_DAC_SDATA2_SEL_P 28
#define TEGRA_DAS_DAC_INPUT_DATA_CLK_SEL_DAC_SDATA2_SEL_S 4
#define TEGRA_DAS_DAC_INPUT_DATA_CLK_SEL_DAC_SDATA1_SEL_P 24
#define TEGRA_DAS_DAC_INPUT_DATA_CLK_SEL_DAC_SDATA1_SEL_S 4
#define TEGRA_DAS_DAC_INPUT_DATA_CLK_SEL_DAC_CLK_SEL_P 0
#define TEGRA_DAS_DAC_INPUT_DATA_CLK_SEL_DAC_CLK_SEL_S 4
/*
* Values for:
* TEGRA_DAS_DAC_INPUT_DATA_CLK_SEL_DAC_SDATA2_SEL
* TEGRA_DAS_DAC_INPUT_DATA_CLK_SEL_DAC_SDATA1_SEL
* TEGRA_DAS_DAC_INPUT_DATA_CLK_SEL_DAC_CLK_SEL
*/
#define TEGRA_DAS_DAC_SEL_DAP1 0
#define TEGRA_DAS_DAC_SEL_DAP2 1
#define TEGRA_DAS_DAC_SEL_DAP3 2
#define TEGRA_DAS_DAC_SEL_DAP4 3
#define TEGRA_DAS_DAC_SEL_DAP5 4
/*
* Names/IDs of the DACs/DAPs.
*/
#define TEGRA_DAS_DAP_ID_1 0
#define TEGRA_DAS_DAP_ID_2 1
#define TEGRA_DAS_DAP_ID_3 2
#define TEGRA_DAS_DAP_ID_4 3
#define TEGRA_DAS_DAP_ID_5 4
#define TEGRA_DAS_DAC_ID_1 0
#define TEGRA_DAS_DAC_ID_2 1
#define TEGRA_DAS_DAC_ID_3 2
struct tegra_das {
struct device *dev;
void __iomem *regs;
struct dentry *debug;
};
/*
* 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: TEGRA_DAS_DAP_ID_*
* dac_sel: DAC to connect to: TEGRA_DAS_DAP_SEL_DAC*
*/
extern int tegra_das_connect_dap_to_dac(int dap_id, int dac_sel);
/*
* Connect a DAP to to another DAP
* dap_id: DAP to connect: TEGRA_DAS_DAP_ID_*
* other_dap_sel: DAP to connect to: TEGRA_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 tegra_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: TEGRA_DAS_DAC_ID_*
* dap_sel: DAP to receive input from: TEGRA_DAS_DAC_SEL_DAP*
*/
extern int tegra_das_connect_dac_to_dap(int dac_id, int dap_sel);
#endif