8304b99a75
arm platform. Add all the atmel boards to the ATMEL kernel for testing purposes. Until boot loader arg parsing of baord type is done, this won't actually be able to do the runtime selection.
79 lines
3.3 KiB
C
79 lines
3.3 KiB
C
/*-
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* Copyright (c) 2005-2008 Olivier Houchard. All rights reserved.
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* Copyright (c) 2005-2008 Warner Losh. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <machine/board.h>
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#include <arm/at91/at91board.h>
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#include <arm/at91/at91rm92reg.h>
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#include <arm/at91/at91_piovar.h>
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#include <arm/at91/at91_pio_rm9200.h>
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BOARD_INIT long
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board_init(void)
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{
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/*
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* Since the USART supports RS-485 multidrop mode, it allows the
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* TX pins to float. However, for RS-232 operations, we don't want
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* these pins to float. Instead, they should be pulled up to avoid
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* mismatches. Linux does something similar when it configures the
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* TX lines. This implies that we also allow the RX lines to float
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* rather than be in the state they are left in by the boot loader.
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* Since they are input pins, I think that this is the right thing
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* to do.
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*/
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/* PIOA's A periph: Turn USART 0 and 2's TX/RX pins */
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at91_pio_use_periph_a(AT91RM92_PIOA_BASE,
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AT91C_PA18_RXD0 | AT91C_PA22_RXD2, 0);
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at91_pio_use_periph_a(AT91RM92_PIOA_BASE,
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AT91C_PA17_TXD0 | AT91C_PA23_TXD2, 1);
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/* PIOA's B periph: Turn USART 3's TX/RX pins */
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at91_pio_use_periph_b(AT91RM92_PIOA_BASE, AT91C_PA6_RXD3, 0);
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at91_pio_use_periph_b(AT91RM92_PIOA_BASE, AT91C_PA5_TXD3, 1);
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/* We're using TC0's A1 and A2 input */
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at91_pio_use_periph_b(AT91RM92_PIOA_BASE,
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AT91C_PA19_TIOA1 | AT91C_PA21_TIOA2, 0);
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/* PIOB's A periph: Turn USART 1's TX/RX pins */
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at91_pio_use_periph_a(AT91RM92_PIOB_BASE, AT91C_PB21_RXD1, 0);
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at91_pio_use_periph_a(AT91RM92_PIOB_BASE, AT91C_PB20_TXD1, 1);
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/* Pin assignment */
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/* Assert PA24 low -- talk to rubidium */
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at91_pio_use_gpio(AT91RM92_PIOA_BASE, AT91C_PIO_PA24);
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at91_pio_gpio_output(AT91RM92_PIOA_BASE, AT91C_PIO_PA24, 0);
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at91_pio_gpio_clear(AT91RM92_PIOA_BASE, AT91C_PIO_PA24);
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at91_pio_use_gpio(AT91RM92_PIOB_BASE,
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AT91C_PIO_PB16 | AT91C_PIO_PB17 | AT91C_PIO_PB18 | AT91C_PIO_PB19);
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return (at91_ramsize());
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}
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ARM_BOARD(NONE, "TSC4370 Controller Board");
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