64 lines
2.7 KiB
C
64 lines
2.7 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);
|
||
|
|
/* 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);
|
||
|
|
|
||
|
|
return (at91_ramsize());
|
||
|
|
}
|