freebsd-dev/sys/arm/at91/board_tsc4370.c
Warner Losh 7558f3d5f0 Convert BWCT and HL200 over to new board mechanism as well. The
TSC4370 config file wasn't committed to this tree, so I don't know if
my changes will work on it or not.
2008-11-25 19:05:46 +00:00

76 lines
3.2 KiB
C

/*-
* Copyright (c) 2005-2008 Olivier Houchard. All rights reserved.
* Copyright (c) 2005-2008 Warner Losh. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <arm/at91/at91board.h>
#include <arm/at91/at91rm92reg.h>
#include <arm/at91/at91_piovar.h>
#include <arm/at91/at91_pio_rm9200.h>
long
board_init(void)
{
/*
* Since the USART supports RS-485 multidrop mode, it allows the
* TX pins to float. However, for RS-232 operations, we don't want
* these pins to float. Instead, they should be pulled up to avoid
* mismatches. Linux does something similar when it configures the
* TX lines. This implies that we also allow the RX lines to float
* rather than be in the state they are left in by the boot loader.
* Since they are input pins, I think that this is the right thing
* to do.
*/
/* PIOA's A periph: Turn USART 0 and 2's TX/RX pins */
at91_pio_use_periph_a(AT91RM92_PIOA_BASE,
AT91C_PA18_RXD0 | AT91C_PA22_RXD2, 0);
at91_pio_use_periph_a(AT91RM92_PIOA_BASE,
AT91C_PA17_TXD0 | AT91C_PA23_TXD2, 1);
/* PIOA's B periph: Turn USART 3's TX/RX pins */
at91_pio_use_periph_b(AT91RM92_PIOA_BASE, AT91C_PA6_RXD3, 0);
at91_pio_use_periph_b(AT91RM92_PIOA_BASE, AT91C_PA5_TXD3, 1);
/* We're using TC0's A1 and A2 input */
at91_pio_use_periph_b(AT91RM92_PIOA_BASE,
AT91C_PA19_TIOA1 | AT91C_PA21_TIOA2, 0);
/* PIOB's A periph: Turn USART 1's TX/RX pins */
at91_pio_use_periph_a(AT91RM92_PIOB_BASE, AT91C_PB21_RXD1, 0);
at91_pio_use_periph_a(AT91RM92_PIOB_BASE, AT91C_PB20_TXD1, 1);
/* Pin assignment */
/* Assert PA24 low -- talk to rubidium */
at91_pio_use_gpio(AT91RM92_PIOA_BASE, AT91C_PIO_PA24);
at91_pio_gpio_output(AT91RM92_PIOA_BASE, AT91C_PIO_PA24, 0);
at91_pio_gpio_clear(AT91RM92_PIOA_BASE, AT91C_PIO_PA24);
at91_pio_use_gpio(AT91RM92_PIOB_BASE,
AT91C_PIO_PB16 | AT91C_PIO_PB17 | AT91C_PIO_PB18 | AT91C_PIO_PB19);
return (at91_ramsize());
}