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 136