diff options
Diffstat (limited to 'arch/arm/cpu/arm920t')
| -rw-r--r-- | arch/arm/cpu/arm920t/at91/Makefile | 1 | ||||
| -rw-r--r-- | arch/arm/cpu/arm920t/at91/at91rm9200_devices.c | 85 |
2 files changed, 86 insertions, 0 deletions
diff --git a/arch/arm/cpu/arm920t/at91/Makefile b/arch/arm/cpu/arm920t/at91/Makefile index 4417dfe..309bcd6 100644 --- a/arch/arm/cpu/arm920t/at91/Makefile +++ b/arch/arm/cpu/arm920t/at91/Makefile @@ -30,6 +30,7 @@ COBJS += reset.o COBJS += timer.o COBJS += clock.o COBJS += cpu.o +COBJS += at91rm9200_devices.o SRCS := $(SOBJS:.o=.S) $(COBJS:.o=.c) OBJS := $(addprefix $(obj),$(SOBJS) $(COBJS)) diff --git a/arch/arm/cpu/arm920t/at91/at91rm9200_devices.c b/arch/arm/cpu/arm920t/at91/at91rm9200_devices.c new file mode 100644 index 0000000..f610a1e --- /dev/null +++ b/arch/arm/cpu/arm920t/at91/at91rm9200_devices.c @@ -0,0 +1,85 @@ +/* + * [partely copied from arch/arm/cpu/arm926ejs/at91/arm9260_devices.c] + * + * (C) Copyright 2011 + * Andreas Bießmann <andreas.devel@googlemail.com> + * + * (C) Copyright 2007-2008 + * Stelian Pop <stelian.pop@leadtechdesign.com> + * Lead Tech Design <www.leadtechdesign.com> + * + * 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 + */ + +#include <common.h> +#include <asm/io.h> +#include <asm/arch/at91_common.h> +#include <asm/arch/at91_pmc.h> +#include <asm/arch/gpio.h> + +/* + * if CONFIG_AT91_GPIO_PULLUP ist set, keep pullups on on all + * peripheral pins. Good to have if hardware is soldered optionally + * or in case of SPI no slave is selected. Avoid lines to float + * needlessly. Use a short local PUP define. + * + * Due to errata "TXD floats when CTS is inactive" pullups are always + * on for TXD pins. + */ +#ifdef CONFIG_AT91_GPIO_PULLUP +# define PUP CONFIG_AT91_GPIO_PULLUP +#else +# define PUP 0 +#endif + +void at91_serial0_hw_init(void) +{ + at91_pmc_t *pmc = (at91_pmc_t *)ATMEL_BASE_PMC; + + at91_set_a_periph(AT91_PIO_PORTA, 17, 1); /* TXD0 */ + at91_set_a_periph(AT91_PIO_PORTA, 18, PUP); /* RXD0 */ + writel(1 << ATMEL_ID_USART0, &pmc->pcer); +} + +void at91_serial1_hw_init(void) +{ + at91_pmc_t *pmc = (at91_pmc_t *)ATMEL_BASE_PMC; + + at91_set_a_periph(AT91_PIO_PORTB, 20, PUP); /* RXD1 */ + at91_set_a_periph(AT91_PIO_PORTB, 21, 1); /* TXD1 */ + writel(1 << ATMEL_ID_USART1, &pmc->pcer); +} + +void at91_serial2_hw_init(void) +{ + at91_pmc_t *pmc = (at91_pmc_t *)ATMEL_BASE_PMC; + + at91_set_a_periph(AT91_PIO_PORTA, 22, PUP); /* RXD2 */ + at91_set_a_periph(AT91_PIO_PORTA, 23, 1); /* TXD2 */ + writel(1 << ATMEL_ID_USART2, &pmc->pcer); +} + + +void at91_seriald_hw_init(void) +{ + at91_set_a_periph(AT91_PIO_PORTA, 30, PUP); /* DRXD */ + at91_set_a_periph(AT91_PIO_PORTA, 31, 1); /* DTXD */ + /* writing SYS to PCER has no effect on AT91RM9200 */ +} + |