board_bwct.c revision 185305
1155324Simp/*- 2185305Simp * Copyright (c) 2005-2008 Olivier Houchard. All rights reserved. 3185305Simp * Copyright (c) 2005-2008 Warner Losh. All rights reserved. 4155324Simp * 5155324Simp * Redistribution and use in source and binary forms, with or without 6155324Simp * modification, are permitted provided that the following conditions 7155324Simp * are met: 8155324Simp * 1. Redistributions of source code must retain the above copyright 9155324Simp * notice, this list of conditions and the following disclaimer. 10155324Simp * 2. Redistributions in binary form must reproduce the above copyright 11155324Simp * notice, this list of conditions and the following disclaimer in the 12155324Simp * documentation and/or other materials provided with the distribution. 13155324Simp * 14185305Simp * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15185305Simp * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16185305Simp * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17185305Simp * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE 18185305Simp * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19185305Simp * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20185305Simp * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21155324Simp * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22155324Simp * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23155324Simp * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24155324Simp * SUCH DAMAGE. 25155324Simp */ 26155324Simp 27160363Simp#include "opt_at91.h" 28155324Simp 29155324Simp#include <sys/cdefs.h> 30155324Simp__FBSDID("$FreeBSD: head/sys/arm/at91/board_kb920x.c 185305 2008-11-25 18:40:40Z imp $"); 31155324Simp#include <sys/param.h> 32155324Simp#include <sys/systm.h> 33155324Simp 34185305Simp#include <arm/at91/at91board.h> 35155324Simp#include <arm/at91/at91rm92reg.h> 36160363Simp#include <arm/at91/at91_piovar.h> 37160363Simp#include <arm/at91/at91_pio_rm9200.h> 38155324Simp 39185305Simplong 40160363Simpboard_init(void) 41160363Simp{ 42160363Simp /* 43174880Sstas * Since the USART supports RS-485 multidrop mode, it allows the 44160363Simp * TX pins to float. However, for RS-232 operations, we don't want 45160363Simp * these pins to float. Instead, they should be pulled up to avoid 46160363Simp * mismatches. Linux does something similar when it configures the 47160363Simp * TX lines. This implies that we also allow the RX lines to float 48160363Simp * rather than be in the state they are left in by the boot loader. 49160363Simp * Since they are input pins, I think that this is the right thing 50160363Simp * to do. 51160363Simp */ 52160363Simp 53160363Simp /* PIOA's A periph: Turn USART 0 and 2's TX/RX pins */ 54160363Simp at91_pio_use_periph_a(AT91RM92_PIOA_BASE, 55160363Simp AT91C_PA18_RXD0 | AT91C_PA22_RXD2, 0); 56160363Simp at91_pio_use_periph_a(AT91RM92_PIOA_BASE, 57160363Simp AT91C_PA17_TXD0 | AT91C_PA23_TXD2, 1); 58160363Simp /* PIOA's B periph: Turn USART 3's TX/RX pins */ 59160363Simp at91_pio_use_periph_b(AT91RM92_PIOA_BASE, AT91C_PA6_RXD3, 0); 60160363Simp at91_pio_use_periph_b(AT91RM92_PIOA_BASE, AT91C_PA5_TXD3, 1); 61160453Scognet#ifdef AT91_TSC 62160363Simp /* We're using TC0's A1 and A2 input */ 63160363Simp at91_pio_use_periph_b(AT91RM92_PIOA_BASE, 64160363Simp AT91C_PA19_TIOA1 | AT91C_PA21_TIOA2, 0); 65160363Simp#endif 66160363Simp /* PIOB's A periph: Turn USART 1's TX/RX pins */ 67160363Simp at91_pio_use_periph_a(AT91RM92_PIOB_BASE, AT91C_PB21_RXD1, 0); 68160363Simp at91_pio_use_periph_a(AT91RM92_PIOB_BASE, AT91C_PB20_TXD1, 1); 69160363Simp 70160363Simp /* Pin assignment */ 71160453Scognet#ifdef AT91_TSC 72160363Simp /* Assert PA24 low -- talk to rubidium */ 73160363Simp at91_pio_use_gpio(AT91RM92_PIOA_BASE, AT91C_PIO_PA24); 74160363Simp at91_pio_gpio_output(AT91RM92_PIOA_BASE, AT91C_PIO_PA24, 0); 75160363Simp at91_pio_gpio_clear(AT91RM92_PIOA_BASE, AT91C_PIO_PA24); 76163521Simp at91_pio_use_gpio(AT91RM92_PIOB_BASE, 77163521Simp AT91C_PIO_PB16 | AT91C_PIO_PB17 | AT91C_PIO_PB18 | AT91C_PIO_PB19); 78160363Simp#endif 79160363Simp 80185305Simp return (at91_ramsize()); 81160363Simp} 82