1 /* 2 * Copyright (c) 2011 The Chromium OS Authors. 3 * See file CREDITS for list of people who contributed to this 4 * project. 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public License as 8 * published by the Free Software Foundation; either version 2 of 9 * the License, or (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU 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., 59 Temple Place, Suite 330, Boston, 19 * MA 02111-1307 USA 20 */ 21 22 /* Tegra20 high-level function multiplexing */ 23 24 #ifndef __FUNCMUX_H 25 #define __FUNCMUX_H 26 27 /* Configs supported by the func mux */ 28 enum { 29 FUNCMUX_DEFAULT = 0, /* default config */ 30 31 /* UART configs */ 32 FUNCMUX_UART1_IRRX_IRTX = 0, 33 FUNCMUX_UART1_UAA_UAB, 34 FUNCMUX_UART1_GPU, 35 FUNCMUX_UART1_SDIO1, 36 FUNCMUX_UART2_IRDA = 0, 37 FUNCMUX_UART4_GMC = 0, 38 39 /* I2C configs */ 40 FUNCMUX_DVC_I2CP = 0, 41 FUNCMUX_I2C1_RM = 0, 42 FUNCMUX_I2C2_DDC = 0, 43 FUNCMUX_I2C2_PTA, 44 FUNCMUX_I2C3_DTF = 0, 45 46 /* SDMMC configs */ 47 FUNCMUX_SDMMC1_SDIO1_4BIT = 0, 48 FUNCMUX_SDMMC2_DTA_DTD_8BIT = 0, 49 FUNCMUX_SDMMC3_SDB_4BIT = 0, 50 FUNCMUX_SDMMC3_SDB_SLXA_8BIT, 51 FUNCMUX_SDMMC4_ATC_ATD_8BIT = 0, 52 FUNCMUX_SDMMC4_ATB_GMA_4_BIT, 53 FUNCMUX_SDMMC4_ATB_GMA_GME_8_BIT, 54 55 /* USB configs */ 56 FUNCMUX_USB2_ULPI = 0, 57 58 /* Serial Flash configs */ 59 FUNCMUX_SPI1_GMC_GMD = 0, 60 61 /* NAND flags */ 62 FUNCMUX_NDFLASH_ATC = 0, 63 }; 64 65 /** 66 * Select a config for a particular peripheral. 67 * 68 * Each peripheral can operate through a number of configurations, 69 * which are sets of pins that it uses to bring out its signals. 70 * The basic config is 0, and higher numbers indicate different 71 * pinmux settings to bring the peripheral out on other pins, 72 * 73 * This function also disables tristate for the function's pins, 74 * so that they operate in normal mode. 75 * 76 * @param id Peripheral id 77 * @param config Configuration to use (FUNCMUX_...), 0 for default 78 * @return 0 if ok, -1 on error (e.g. incorrect id or config) 79 */ 80 int funcmux_select(enum periph_id id, int config); 81 82 #endif 83