sound/soc/tegra/tegra20_das.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * tegra20_das.h - Definitions for Tegra20 DAS driver
   4  *
   5  * Author: Stephen Warren <swarren@nvidia.com>
   6  * Copyright (C) 2010,2012 - NVIDIA, Inc.
   7  */
   8
   9 #ifndef __TEGRA20_DAS_H__
  10 #define __TEGRA20_DAS_H__
  11
  12 /* Register TEGRA20_DAS_DAP_CTRL_SEL */
  13 #define TEGRA20_DAS_DAP_CTRL_SEL                        0x00
  14 #define TEGRA20_DAS_DAP_CTRL_SEL_COUNT                  5
  15 #define TEGRA20_DAS_DAP_CTRL_SEL_STRIDE                 4
  16 #define TEGRA20_DAS_DAP_CTRL_SEL_DAP_MS_SEL_P           31
  17 #define TEGRA20_DAS_DAP_CTRL_SEL_DAP_MS_SEL_S           1
  18 #define TEGRA20_DAS_DAP_CTRL_SEL_DAP_SDATA1_TX_RX_P     30
  19 #define TEGRA20_DAS_DAP_CTRL_SEL_DAP_SDATA1_TX_RX_S     1
  20 #define TEGRA20_DAS_DAP_CTRL_SEL_DAP_SDATA2_TX_RX_P     29
  21 #define TEGRA20_DAS_DAP_CTRL_SEL_DAP_SDATA2_TX_RX_S     1
  22 #define TEGRA20_DAS_DAP_CTRL_SEL_DAP_CTRL_SEL_P         0
  23 #define TEGRA20_DAS_DAP_CTRL_SEL_DAP_CTRL_SEL_S         5
  24
  25 /* Values for field TEGRA20_DAS_DAP_CTRL_SEL_DAP_CTRL_SEL */
  26 #define TEGRA20_DAS_DAP_SEL_DAC1        0
  27 #define TEGRA20_DAS_DAP_SEL_DAC2        1
  28 #define TEGRA20_DAS_DAP_SEL_DAC3        2
  29 #define TEGRA20_DAS_DAP_SEL_DAP1        16
  30 #define TEGRA20_DAS_DAP_SEL_DAP2        17
  31 #define TEGRA20_DAS_DAP_SEL_DAP3        18
  32 #define TEGRA20_DAS_DAP_SEL_DAP4        19
  33 #define TEGRA20_DAS_DAP_SEL_DAP5        20
  34
  35 /* Register TEGRA20_DAS_DAC_INPUT_DATA_CLK_SEL */
  36 #define TEGRA20_DAS_DAC_INPUT_DATA_CLK_SEL                      0x40
  37 #define TEGRA20_DAS_DAC_INPUT_DATA_CLK_SEL_COUNT                3
  38 #define TEGRA20_DAS_DAC_INPUT_DATA_CLK_SEL_STRIDE               4
  39 #define TEGRA20_DAS_DAC_INPUT_DATA_CLK_SEL_DAC_SDATA2_SEL_P     28
  40 #define TEGRA20_DAS_DAC_INPUT_DATA_CLK_SEL_DAC_SDATA2_SEL_S     4
  41 #define TEGRA20_DAS_DAC_INPUT_DATA_CLK_SEL_DAC_SDATA1_SEL_P     24
  42 #define TEGRA20_DAS_DAC_INPUT_DATA_CLK_SEL_DAC_SDATA1_SEL_S     4
  43 #define TEGRA20_DAS_DAC_INPUT_DATA_CLK_SEL_DAC_CLK_SEL_P        0
  44 #define TEGRA20_DAS_DAC_INPUT_DATA_CLK_SEL_DAC_CLK_SEL_S        4
  45
  46 /*
  47  * Values for:
  48  * TEGRA20_DAS_DAC_INPUT_DATA_CLK_SEL_DAC_SDATA2_SEL
  49  * TEGRA20_DAS_DAC_INPUT_DATA_CLK_SEL_DAC_SDATA1_SEL
  50  * TEGRA20_DAS_DAC_INPUT_DATA_CLK_SEL_DAC_CLK_SEL
  51  */
  52 #define TEGRA20_DAS_DAC_SEL_DAP1        0
  53 #define TEGRA20_DAS_DAC_SEL_DAP2        1
  54 #define TEGRA20_DAS_DAC_SEL_DAP3        2
  55 #define TEGRA20_DAS_DAC_SEL_DAP4        3
  56 #define TEGRA20_DAS_DAC_SEL_DAP5        4
  57
  58 /*
  59  * Names/IDs of the DACs/DAPs.
  60  */
  61
  62 #define TEGRA20_DAS_DAP_ID_1 0
  63 #define TEGRA20_DAS_DAP_ID_2 1
  64 #define TEGRA20_DAS_DAP_ID_3 2
  65 #define TEGRA20_DAS_DAP_ID_4 3
  66 #define TEGRA20_DAS_DAP_ID_5 4
  67
  68 #define TEGRA20_DAS_DAC_ID_1 0
  69 #define TEGRA20_DAS_DAC_ID_2 1
  70 #define TEGRA20_DAS_DAC_ID_3 2
  71
  72 struct tegra20_das {
  73         struct device *dev;
  74         struct regmap *regmap;
  75 };
  76
  77 /*
  78  * Terminology:
  79  * DAS: Digital audio switch (HW module controlled by this driver)
  80  * DAP: Digital audio port (port/pins on Tegra device)
  81  * DAC: Digital audio controller (e.g. I2S or AC97 controller elsewhere)
  82  *
  83  * The Tegra DAS is a mux/cross-bar which can connect each DAP to a specific
  84  * DAC, or another DAP. When DAPs are connected, one must be the master and
  85  * one the slave. Each DAC allows selection of a specific DAP for input, to
  86  * cater for the case where N DAPs are connected to 1 DAC for broadcast
  87  * output.
  88  *
  89  * This driver is dumb; no attempt is made to ensure that a valid routing
  90  * configuration is programmed.
  91  */
  92
  93 /*
  94  * Connect a DAP to a DAC
  95  * dap_id: DAP to connect: TEGRA20_DAS_DAP_ID_*
  96  * dac_sel: DAC to connect to: TEGRA20_DAS_DAP_SEL_DAC*
  97  */
  98 extern int tegra20_das_connect_dap_to_dac(int dap_id, int dac_sel);
  99
 100 /*
 101  * Connect a DAP to another DAP
 102  * dap_id: DAP to connect: TEGRA20_DAS_DAP_ID_*
 103  * other_dap_sel: DAP to connect to: TEGRA20_DAS_DAP_SEL_DAP*
 104  * master: Is this DAP the master (1) or slave (0)
 105  * sdata1rx: Is this DAP's SDATA1 pin RX (1) or TX (0)
 106  * sdata2rx: Is this DAP's SDATA2 pin RX (1) or TX (0)
 107  */
 108 extern int tegra20_das_connect_dap_to_dap(int dap_id, int other_dap_sel,
 109                                           int master, int sdata1rx,
 110                                           int sdata2rx);
 111
 112 /*
 113  * Connect a DAC's input to a DAP
 114  * (DAC outputs are selected by the DAP)
 115  * dac_id: DAC ID to connect: TEGRA20_DAS_DAC_ID_*
 116  * dap_sel: DAP to receive input from: TEGRA20_DAS_DAC_SEL_DAP*
 117  */
 118 extern int tegra20_das_connect_dac_to_dap(int dac_id, int dap_sel);
 119
 120 #endif