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/*-
* Copyright (c) 2012 M. 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 <sys/bus.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/module.h>
#define _ARM32_BUS_DMA_PRIVATE
#include <machine/bus.h>
#include <arm/at91/at91var.h>
#include <arm/at91/at91board.h>
#include <arm/at91/at91rm92reg.h>
#include <arm/at91/at91rm9200var.h>
#include <arm/at91/at91_pioreg.h>
#include <arm/at91/at91_piovar.h>
/*
* The AT91RM9200 uses the same silicon for both the BGA and PQFP
* packages. There's no documented way to detect this at runtime,
* so we require the board code to register what type of SoC is on the
* board in question. The pinouts are not quite compatible, and we
* use this information to cope with the slight differences.
*/
void
at91rm9200_set_subtype(enum at91_soc_subtype st)
{
switch (st) {
case AT91_ST_RM9200_BGA:
case AT91_ST_RM9200_PQFP:
soc_info.subtype = st;
break;
default:
panic("Bad SoC subtype %d for at91rm9200_set_subtype.", st);
break;
}
}
void
at91rm9200_config_uart(unsigned devid, unsigned unit, unsigned pinmask)
{
/*
* 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.
*/
switch (devid) {
case AT91_ID_DBGU:
at91_pio_use_periph_a(AT91RM92_PIOA_BASE, AT91C_PIO_PA30, 0); /* DRXD */
at91_pio_use_periph_a(AT91RM92_PIOA_BASE, AT91C_PIO_PA31, 1); /* DTXD */
break;
case AT91RM9200_ID_USART0:
at91_pio_use_periph_a(AT91RM92_PIOA_BASE, AT91C_PIO_PA17, 1); /* TXD0 */
at91_pio_use_periph_a(AT91RM92_PIOA_BASE, AT91C_PIO_PA19, 0); /* RXD0 */
/* CTS PA20 */
/* RTS -- errata #39 PA21 */
break;
case AT91RM9200_ID_USART1:
at91_pio_use_periph_a(AT91RM92_PIOB_BASE, AT91C_PIO_PB20, 1); /* TXD1 */
at91_pio_use_periph_a(AT91RM92_PIOB_BASE, AT91C_PIO_PB21, 0); /* RXD1 */
/* RI - PB18 */
/* DTR - PB19 */
/* DCD - PB23 */
/* CTS - PB24 */
/* DSR - PB25 */
/* RTS - PB26 */
break;
case AT91RM9200_ID_USART2:
at91_pio_use_periph_a(AT91RM92_PIOA_BASE, AT91C_PIO_PA22, 0); /* RXD2 */
at91_pio_use_periph_a(AT91RM92_PIOA_BASE, AT91C_PIO_PA23, 1); /* TXD2 */
/* CTS - PA30 B periph */
/* RTS - PA31 B periph */
break;
case AT91RM9200_ID_USART3:
at91_pio_use_periph_b(AT91RM92_PIOA_BASE, AT91C_PIO_PA5, 1); /* TXD3 */
at91_pio_use_periph_b(AT91RM92_PIOA_BASE, AT91C_PIO_PA6, 0); /* RXD3 */
/* CTS - PB0 B periph */
/* RTS - PB1 B periph */
break;
default:
break;
}
}
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