diff options
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/cpu/armv7/tegra2/Makefile | 2 | ||||
| -rw-r--r-- | arch/arm/cpu/armv7/tegra2/funcmux.c | 58 | ||||
| -rw-r--r-- | arch/arm/include/asm/arch-tegra2/funcmux.h | 41 |
3 files changed, 100 insertions, 1 deletions
diff --git a/arch/arm/cpu/armv7/tegra2/Makefile b/arch/arm/cpu/armv7/tegra2/Makefile index 955c3b6..f668a81 100644 --- a/arch/arm/cpu/armv7/tegra2/Makefile +++ b/arch/arm/cpu/armv7/tegra2/Makefile @@ -33,7 +33,7 @@ include $(TOPDIR)/config.mk LIB = $(obj)lib$(SOC).o SOBJS := lowlevel_init.o -COBJS := ap20.o board.o clock.o pinmux.o sys_info.o timer.o +COBJS := ap20.o board.o clock.o funcmux.o pinmux.o sys_info.o timer.o SRCS := $(SOBJS:.o=.S) $(COBJS:.o=.c) OBJS := $(addprefix $(obj),$(COBJS) $(SOBJS)) diff --git a/arch/arm/cpu/armv7/tegra2/funcmux.c b/arch/arm/cpu/armv7/tegra2/funcmux.c new file mode 100644 index 0000000..0878f51 --- /dev/null +++ b/arch/arm/cpu/armv7/tegra2/funcmux.c @@ -0,0 +1,58 @@ +/* + * Copyright (c) 2011 The Chromium OS Authors. + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * 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., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +/* Tegra2 high-level function multiplexing */ +#include <common.h> +#include <asm/arch/clock.h> +#include <asm/arch/pinmux.h> + +int funcmux_select(enum periph_id id, int config) +{ + if (config != 0) { + debug("%s: invalid config %d for periph_id %d", __func__, + config, id); + return -1; + } + switch (id) { + case PERIPH_ID_UART1: + pinmux_set_func(PINGRP_IRRX, PMUX_FUNC_UARTA); + pinmux_set_func(PINGRP_IRTX, PMUX_FUNC_UARTA); + pinmux_tristate_disable(PINGRP_IRRX); + pinmux_tristate_disable(PINGRP_IRTX); + break; + + case PERIPH_ID_UART2: + pinmux_set_func(PINGRP_UAD, PMUX_FUNC_IRDA); + pinmux_tristate_disable(PINGRP_UAD); + break; + + case PERIPH_ID_UART4: + pinmux_set_func(PINGRP_GMC, PMUX_FUNC_UARTD); + pinmux_tristate_disable(PINGRP_GMC); + break; + + default: + debug("%s: invalid periph_id %d", __func__, id); + return -1; + } + + return 0; +} diff --git a/arch/arm/include/asm/arch-tegra2/funcmux.h b/arch/arm/include/asm/arch-tegra2/funcmux.h new file mode 100644 index 0000000..2d724a2 --- /dev/null +++ b/arch/arm/include/asm/arch-tegra2/funcmux.h @@ -0,0 +1,41 @@ +/* + * Copyright (c) 2011 The Chromium OS Authors. + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * 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., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +/* Tegra2 high-level function multiplexing */ + +#ifndef __FUNCMUX_H +#define __FUNCMUX_H + +/** + * Select a config for a particular peripheral. + * + * Each peripheral can operate through a number of configurations, + * which are sets of pins that it uses to bring out its signals. + * The basic config is 0, and higher numbers indicate different + * pinmux settings to bring the peripheral out on other pins, + * + * @param id Peripheral id + * @param config Configuration to use (generally 0) + * @return 0 if ok, -1 on error (e.g. incorrect id or config) + */ +int funcmux_select(enum periph_id id, int config); + +#endif |