[people/ms/u-boot.git] / arch / arm / cpu / arm920t / at91 / at91rm9200_devices.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 */
}
Commit	Line	Data
d703355f AB	1	/*
	2	* [partely copied from arch/arm/cpu/arm926ejs/at91/arm9260_devices.c]
	3	*
	4	* (C) Copyright 2011
	5	* Andreas Bießmann <andreas.devel@googlemail.com>
	6	*
	7	* (C) Copyright 2007-2008
	8	* Stelian Pop <stelian.pop@leadtechdesign.com>
	9	* Lead Tech Design <www.leadtechdesign.com>
	10	*
	11	* See file CREDITS for list of people who contributed to this
	12	* project.
	13	*
	14	* This program is free software; you can redistribute it and/or
	15	* modify it under the terms of the GNU General Public License as
	16	* published by the Free Software Foundation; either version 2 of
	17	* the License, or (at your option) any later version.
	18	*
	19	* This program is distributed in the hope that it will be useful,
	20	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	21	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	22	* GNU General Public License for more details.
	23	*
	24	* You should have received a copy of the GNU General Public License
	25	* along with this program; if not, write to the Free Software
	26	* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
	27	* MA 02111-1307 USA
	28	*/
	29
	30	#include <common.h>
	31	#include <asm/io.h>
	32	#include <asm/arch/at91_common.h>
	33	#include <asm/arch/at91_pmc.h>
	34	#include <asm/arch/gpio.h>
	35
	36	/*
	37	* if CONFIG_AT91_GPIO_PULLUP ist set, keep pullups on on all
	38	* peripheral pins. Good to have if hardware is soldered optionally
	39	* or in case of SPI no slave is selected. Avoid lines to float
	40	* needlessly. Use a short local PUP define.
	41	*
	42	* Due to errata "TXD floats when CTS is inactive" pullups are always
	43	* on for TXD pins.
	44	*/
	45	#ifdef CONFIG_AT91_GPIO_PULLUP
	46	# define PUP CONFIG_AT91_GPIO_PULLUP
	47	#else
	48	# define PUP 0
	49	#endif
	50
	51	void at91_serial0_hw_init(void)
	52	{
	53	at91_pmc_t pmc = (at91_pmc_t )ATMEL_BASE_PMC;
	54
	55	at91_set_a_periph(AT91_PIO_PORTA, 17, 1); /* TXD0 */
	56	at91_set_a_periph(AT91_PIO_PORTA, 18, PUP); /* RXD0 */
	57	writel(1 << ATMEL_ID_USART0, &pmc->pcer);
	58	}
	59
	60	void at91_serial1_hw_init(void)
	61	{
	62	at91_pmc_t pmc = (at91_pmc_t )ATMEL_BASE_PMC;
	63
	64	at91_set_a_periph(AT91_PIO_PORTB, 20, PUP); /* RXD1 */
65	at91_set_a_periph(AT91_PIO_PORTB, 21, 1); /* TXD1 */
66	writel(1 << ATMEL_ID_USART1, &pmc->pcer);
67	}
68
69	void at91_serial2_hw_init(void)
70	{
71	at91_pmc_t pmc = (at91_pmc_t )ATMEL_BASE_PMC;
72
73	at91_set_a_periph(AT91_PIO_PORTA, 22, PUP); /* RXD2 */
74	at91_set_a_periph(AT91_PIO_PORTA, 23, 1); /* TXD2 */
75	writel(1 << ATMEL_ID_USART2, &pmc->pcer);
76	}
77
d703355f AB	78	void at91_seriald_hw_init(void)
	79	{
	80	at91_set_a_periph(AT91_PIO_PORTA, 30, PUP); /* DRXD */
	81	at91_set_a_periph(AT91_PIO_PORTA, 31, 1); /* DTXD */
	82	/* writing SYS to PCER has no effect on AT91RM9200 */
	83	}