| Stephen Warren | f0d8af4 | 2011-01-07 22:36:12 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * tegra_das.h - Definitions for Tegra DAS driver |
| 3 | * |
| 4 | * Author: Stephen Warren <swarren@nvidia.com> |
| 5 | * Copyright (C) 2010 - NVIDIA, Inc. |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or |
| 8 | * modify it under the terms of the GNU General Public License |
| 9 | * version 2 as published by the Free Software Foundation. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, but |
| 12 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14 | * General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA |
| 19 | * 02110-1301 USA |
| 20 | * |
| 21 | */ |
| 22 | |
| 23 | #ifndef __TEGRA_DAS_H__ |
| 24 | #define __TEGRA_DAS_H__ |
| 25 | |
| 26 | /* Register TEGRA_DAS_DAP_CTRL_SEL */ |
| 27 | #define TEGRA_DAS_DAP_CTRL_SEL 0x00 |
| 28 | #define TEGRA_DAS_DAP_CTRL_SEL_COUNT 5 |
| 29 | #define TEGRA_DAS_DAP_CTRL_SEL_STRIDE 4 |
| 30 | #define TEGRA_DAS_DAP_CTRL_SEL_DAP_MS_SEL_P 31 |
| 31 | #define TEGRA_DAS_DAP_CTRL_SEL_DAP_MS_SEL_S 1 |
| 32 | #define TEGRA_DAS_DAP_CTRL_SEL_DAP_SDATA1_TX_RX_P 30 |
| 33 | #define TEGRA_DAS_DAP_CTRL_SEL_DAP_SDATA1_TX_RX_S 1 |
| 34 | #define TEGRA_DAS_DAP_CTRL_SEL_DAP_SDATA2_TX_RX_P 29 |
| 35 | #define TEGRA_DAS_DAP_CTRL_SEL_DAP_SDATA2_TX_RX_S 1 |
| 36 | #define TEGRA_DAS_DAP_CTRL_SEL_DAP_CTRL_SEL_P 0 |
| 37 | #define TEGRA_DAS_DAP_CTRL_SEL_DAP_CTRL_SEL_S 5 |
| 38 | |
| 39 | /* Values for field TEGRA_DAS_DAP_CTRL_SEL_DAP_CTRL_SEL */ |
| 40 | #define TEGRA_DAS_DAP_SEL_DAC1 0 |
| 41 | #define TEGRA_DAS_DAP_SEL_DAC2 1 |
| 42 | #define TEGRA_DAS_DAP_SEL_DAC3 2 |
| 43 | #define TEGRA_DAS_DAP_SEL_DAP1 16 |
| 44 | #define TEGRA_DAS_DAP_SEL_DAP2 17 |
| 45 | #define TEGRA_DAS_DAP_SEL_DAP3 18 |
| 46 | #define TEGRA_DAS_DAP_SEL_DAP4 19 |
| 47 | #define TEGRA_DAS_DAP_SEL_DAP5 20 |
| 48 | |
| 49 | /* Register TEGRA_DAS_DAC_INPUT_DATA_CLK_SEL */ |
| 50 | #define TEGRA_DAS_DAC_INPUT_DATA_CLK_SEL 0x40 |
| 51 | #define TEGRA_DAS_DAC_INPUT_DATA_CLK_SEL_COUNT 3 |
| 52 | #define TEGRA_DAS_DAC_INPUT_DATA_CLK_SEL_STRIDE 4 |
| 53 | #define TEGRA_DAS_DAC_INPUT_DATA_CLK_SEL_DAC_SDATA2_SEL_P 28 |
| 54 | #define TEGRA_DAS_DAC_INPUT_DATA_CLK_SEL_DAC_SDATA2_SEL_S 4 |
| 55 | #define TEGRA_DAS_DAC_INPUT_DATA_CLK_SEL_DAC_SDATA1_SEL_P 24 |
| 56 | #define TEGRA_DAS_DAC_INPUT_DATA_CLK_SEL_DAC_SDATA1_SEL_S 4 |
| 57 | #define TEGRA_DAS_DAC_INPUT_DATA_CLK_SEL_DAC_CLK_SEL_P 0 |
| 58 | #define TEGRA_DAS_DAC_INPUT_DATA_CLK_SEL_DAC_CLK_SEL_S 4 |
| 59 | |
| 60 | /* |
| 61 | * Values for: |
| 62 | * TEGRA_DAS_DAC_INPUT_DATA_CLK_SEL_DAC_SDATA2_SEL |
| 63 | * TEGRA_DAS_DAC_INPUT_DATA_CLK_SEL_DAC_SDATA1_SEL |
| 64 | * TEGRA_DAS_DAC_INPUT_DATA_CLK_SEL_DAC_CLK_SEL |
| 65 | */ |
| 66 | #define TEGRA_DAS_DAC_SEL_DAP1 0 |
| 67 | #define TEGRA_DAS_DAC_SEL_DAP2 1 |
| 68 | #define TEGRA_DAS_DAC_SEL_DAP3 2 |
| 69 | #define TEGRA_DAS_DAC_SEL_DAP4 3 |
| 70 | #define TEGRA_DAS_DAC_SEL_DAP5 4 |
| 71 | |
| 72 | /* |
| 73 | * Names/IDs of the DACs/DAPs. |
| 74 | */ |
| 75 | |
| 76 | #define TEGRA_DAS_DAP_ID_1 0 |
| 77 | #define TEGRA_DAS_DAP_ID_2 1 |
| 78 | #define TEGRA_DAS_DAP_ID_3 2 |
| 79 | #define TEGRA_DAS_DAP_ID_4 3 |
| 80 | #define TEGRA_DAS_DAP_ID_5 4 |
| 81 | |
| 82 | #define TEGRA_DAS_DAC_ID_1 0 |
| 83 | #define TEGRA_DAS_DAC_ID_2 1 |
| 84 | #define TEGRA_DAS_DAC_ID_3 2 |
| 85 | |
| 86 | struct tegra_das { |
| 87 | struct device *dev; |
| 88 | void __iomem *regs; |
| 89 | struct dentry *debug; |
| 90 | }; |
| 91 | |
| 92 | /* |
| 93 | * Terminology: |
| 94 | * DAS: Digital audio switch (HW module controlled by this driver) |
| 95 | * DAP: Digital audio port (port/pins on Tegra device) |
| 96 | * DAC: Digital audio controller (e.g. I2S or AC97 controller elsewhere) |
| 97 | * |
| 98 | * The Tegra DAS is a mux/cross-bar which can connect each DAP to a specific |
| 99 | * DAC, or another DAP. When DAPs are connected, one must be the master and |
| 100 | * one the slave. Each DAC allows selection of a specific DAP for input, to |
| 101 | * cater for the case where N DAPs are connected to 1 DAC for broadcast |
| 102 | * output. |
| 103 | * |
| 104 | * This driver is dumb; no attempt is made to ensure that a valid routing |
| 105 | * configuration is programmed. |
| 106 | */ |
| 107 | |
| 108 | /* |
| 109 | * Connect a DAP to to a DAC |
| 110 | * dap_id: DAP to connect: TEGRA_DAS_DAP_ID_* |
| 111 | * dac_sel: DAC to connect to: TEGRA_DAS_DAP_SEL_DAC* |
| 112 | */ |
| 113 | extern int tegra_das_connect_dap_to_dac(int dap_id, int dac_sel); |
| 114 | |
| 115 | /* |
| 116 | * Connect a DAP to to another DAP |
| 117 | * dap_id: DAP to connect: TEGRA_DAS_DAP_ID_* |
| 118 | * other_dap_sel: DAP to connect to: TEGRA_DAS_DAP_SEL_DAP* |
| 119 | * master: Is this DAP the master (1) or slave (0) |
| 120 | * sdata1rx: Is this DAP's SDATA1 pin RX (1) or TX (0) |
| 121 | * sdata2rx: Is this DAP's SDATA2 pin RX (1) or TX (0) |
| 122 | */ |
| 123 | extern int tegra_das_connect_dap_to_dap(int dap_id, int other_dap_sel, |
| 124 | int master, int sdata1rx, |
| 125 | int sdata2rx); |
| 126 | |
| 127 | /* |
| 128 | * Connect a DAC's input to a DAP |
| 129 | * (DAC outputs are selected by the DAP) |
| 130 | * dac_id: DAC ID to connect: TEGRA_DAS_DAC_ID_* |
| 131 | * dap_sel: DAP to receive input from: TEGRA_DAS_DAC_SEL_DAP* |
| 132 | */ |
| 133 | extern int tegra_das_connect_dac_to_dap(int dac_id, int dap_sel); |
| 134 | |
| 135 | #endif |