mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-01 00:49:43 +00:00
84 lines
2.5 KiB
C
84 lines
2.5 KiB
C
|
/*
|
||
|
|
* [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 */
|
||
|
|
}
|