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/*
* [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@popies.net>
* Lead Tech Design <www.leadtechdesign.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#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 */
}
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